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Commit | Line | Data |
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a19920cc | 1 | /* |
e23775f2 | 2 | * GENEVE: Generic Network Virtualization Encapsulation |
a19920cc | 3 | * |
e23775f2 | 4 | * Copyright (c) 2015 Red Hat, Inc. |
a19920cc | 5 | * |
e23775f2 PS |
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. | |
a19920cc JG |
9 | */ |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
a19920cc | 14 | #include <linux/module.h> |
a19920cc | 15 | #include <linux/netdevice.h> |
a19920cc | 16 | #include <linux/etherdevice.h> |
e23775f2 PS |
17 | #include <linux/hash.h> |
18 | #include <linux/if_link.h> | |
8063e095 | 19 | #include <linux/if_vlan.h> |
e23775f2 | 20 | |
f2252c61 | 21 | #include <net/addrconf.h> |
e02c0ed7 | 22 | #include <net/dst_cache.h> |
e23775f2 | 23 | #include <net/dst_metadata.h> |
a19920cc JG |
24 | #include <net/net_namespace.h> |
25 | #include <net/netns/generic.h> | |
e23775f2 | 26 | #include <net/rtnetlink.h> |
a19920cc JG |
27 | #include <net/geneve.h> |
28 | #include <net/protocol.h> | |
f2252c61 PS |
29 | #include <net/udp_tunnel.h> |
30 | #include <net/ip6_route.h> | |
31 | #if IS_ENABLED(CONFIG_IPV6) | |
32 | #include <net/ipv6.h> | |
33 | #include <net/addrconf.h> | |
34 | #include <net/ip6_tunnel.h> | |
35 | #include <net/ip6_checksum.h> | |
36 | #endif | |
37 | ||
a19920cc | 38 | |
a19920cc | 39 | #include "gso.h" |
e23775f2 PS |
40 | #include "vport-netdev.h" |
41 | #include "compat.h" | |
42 | ||
1c95839f | 43 | #ifndef USE_UPSTREAM_TUNNEL |
f2252c61 | 44 | |
e23775f2 PS |
45 | #define GENEVE_NETDEV_VER "0.6" |
46 | ||
47 | #define GENEVE_UDP_PORT 6081 | |
48 | ||
49 | #define GENEVE_N_VID (1u << 24) | |
50 | #define GENEVE_VID_MASK (GENEVE_N_VID - 1) | |
a19920cc | 51 | |
e23775f2 PS |
52 | #define VNI_HASH_BITS 10 |
53 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
54 | ||
55 | #define GENEVE_VER 0 | |
56 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
57 | ||
58 | /* per-network namespace private data for this module */ | |
59 | struct geneve_net { | |
60 | struct list_head geneve_list; | |
61 | struct list_head sock_list; | |
62 | }; | |
63 | ||
64 | static int geneve_net_id; | |
65 | ||
f2252c61 PS |
66 | union geneve_addr { |
67 | struct sockaddr_in sin; | |
68 | struct sockaddr_in6 sin6; | |
69 | struct sockaddr sa; | |
70 | }; | |
71 | ||
72 | static union geneve_addr geneve_remote_unspec = { .sa.sa_family = AF_UNSPEC, }; | |
73 | ||
e23775f2 PS |
74 | /* Pseudo network device */ |
75 | struct geneve_dev { | |
76 | struct hlist_node hlist; /* vni hash table */ | |
77 | struct net *net; /* netns for packet i/o */ | |
78 | struct net_device *dev; /* netdev for geneve tunnel */ | |
f2252c61 PS |
79 | struct geneve_sock *sock4; /* IPv4 socket used for geneve tunnel */ |
80 | #if IS_ENABLED(CONFIG_IPV6) | |
81 | struct geneve_sock *sock6; /* IPv6 socket used for geneve tunnel */ | |
82 | #endif | |
e23775f2 PS |
83 | u8 vni[3]; /* virtual network ID for tunnel */ |
84 | u8 ttl; /* TTL override */ | |
85 | u8 tos; /* TOS override */ | |
f2252c61 | 86 | union geneve_addr remote; /* IP address for link partner */ |
e23775f2 | 87 | struct list_head next; /* geneve's per namespace list */ |
f2252c61 | 88 | __be32 label; /* IPv6 flowlabel override */ |
e23775f2 PS |
89 | __be16 dst_port; |
90 | bool collect_md; | |
f2252c61 | 91 | u32 flags; |
e02c0ed7 | 92 | struct dst_cache dst_cache; |
e23775f2 PS |
93 | }; |
94 | ||
f2252c61 PS |
95 | /* Geneve device flags */ |
96 | #define GENEVE_F_UDP_ZERO_CSUM_TX BIT(0) | |
97 | #define GENEVE_F_UDP_ZERO_CSUM6_TX BIT(1) | |
98 | #define GENEVE_F_UDP_ZERO_CSUM6_RX BIT(2) | |
99 | ||
e23775f2 PS |
100 | struct geneve_sock { |
101 | bool collect_md; | |
102 | struct list_head list; | |
103 | struct socket *sock; | |
104 | struct rcu_head rcu; | |
105 | int refcnt; | |
f2252c61 PS |
106 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
107 | u32 flags; | |
e23775f2 PS |
108 | #ifdef HAVE_UDP_OFFLOAD |
109 | struct udp_offload udp_offloads; | |
110 | #endif | |
e23775f2 PS |
111 | }; |
112 | ||
113 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
a19920cc | 114 | { |
e23775f2 | 115 | __u32 vnid; |
a19920cc | 116 | |
e23775f2 PS |
117 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; |
118 | return hash_32(vnid, VNI_HASH_BITS); | |
a19920cc JG |
119 | } |
120 | ||
e23775f2 | 121 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
a19920cc | 122 | { |
e23775f2 PS |
123 | #ifdef __BIG_ENDIAN |
124 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
125 | #else | |
126 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
127 | ((__force u64)vni[1] << 48) | | |
128 | ((__force u64)vni[2] << 56)); | |
129 | #endif | |
130 | } | |
131 | ||
f2252c61 PS |
132 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
133 | { | |
134 | return gs->sock->sk->sk_family; | |
135 | } | |
136 | ||
e23775f2 PS |
137 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
138 | __be32 addr, u8 vni[]) | |
139 | { | |
140 | struct hlist_head *vni_list_head; | |
141 | struct geneve_dev *geneve; | |
142 | __u32 hash; | |
143 | ||
144 | /* Find the device for this VNI */ | |
145 | hash = geneve_net_vni_hash(vni); | |
146 | vni_list_head = &gs->vni_list[hash]; | |
147 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
148 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
f2252c61 PS |
149 | addr == geneve->remote.sin.sin_addr.s_addr) |
150 | return geneve; | |
151 | } | |
152 | return NULL; | |
153 | } | |
154 | ||
155 | #if IS_ENABLED(CONFIG_IPV6) | |
156 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
157 | struct in6_addr addr6, u8 vni[]) | |
158 | { | |
159 | struct hlist_head *vni_list_head; | |
160 | struct geneve_dev *geneve; | |
161 | __u32 hash; | |
162 | ||
163 | /* Find the device for this VNI */ | |
164 | hash = geneve_net_vni_hash(vni); | |
165 | vni_list_head = &gs->vni_list[hash]; | |
166 | hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) { | |
167 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
168 | ipv6_addr_equal(&addr6, &geneve->remote.sin6.sin6_addr)) | |
e23775f2 PS |
169 | return geneve; |
170 | } | |
171 | return NULL; | |
172 | } | |
f2252c61 | 173 | #endif |
e23775f2 PS |
174 | |
175 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) | |
176 | { | |
177 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
178 | } | |
179 | ||
f2252c61 PS |
180 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
181 | struct sk_buff *skb) | |
e23775f2 | 182 | { |
e23775f2 PS |
183 | u8 *vni; |
184 | __be32 addr; | |
f2252c61 PS |
185 | static u8 zero_vni[3]; |
186 | #if IS_ENABLED(CONFIG_IPV6) | |
187 | static struct in6_addr zero_addr6; | |
188 | #endif | |
a19920cc | 189 | |
f2252c61 PS |
190 | if (geneve_get_sk_family(gs) == AF_INET) { |
191 | struct iphdr *iph; | |
a19920cc | 192 | |
f2252c61 | 193 | iph = ip_hdr(skb); /* outer IP header... */ |
e23775f2 | 194 | |
f2252c61 PS |
195 | if (gs->collect_md) { |
196 | vni = zero_vni; | |
197 | addr = 0; | |
198 | } else { | |
199 | vni = geneve_hdr(skb)->vni; | |
200 | addr = iph->saddr; | |
201 | } | |
202 | ||
203 | return geneve_lookup(gs, addr, vni); | |
204 | #if IS_ENABLED(CONFIG_IPV6) | |
205 | } else if (geneve_get_sk_family(gs) == AF_INET6) { | |
206 | struct ipv6hdr *ip6h; | |
207 | struct in6_addr addr6; | |
208 | ||
209 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ | |
210 | ||
211 | if (gs->collect_md) { | |
212 | vni = zero_vni; | |
213 | addr6 = zero_addr6; | |
214 | } else { | |
215 | vni = geneve_hdr(skb)->vni; | |
216 | addr6 = ip6h->saddr; | |
217 | } | |
218 | ||
219 | return geneve6_lookup(gs, addr6, vni); | |
220 | #endif | |
a19920cc | 221 | } |
f2252c61 PS |
222 | return NULL; |
223 | } | |
a19920cc | 224 | |
f2252c61 PS |
225 | /* geneve receive/decap routine */ |
226 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
227 | struct sk_buff *skb) | |
228 | { | |
229 | struct genevehdr *gnvh = geneve_hdr(skb); | |
230 | struct metadata_dst *tun_dst = NULL; | |
231 | struct pcpu_sw_netstats *stats; | |
232 | int err = 0; | |
233 | void *oiph; | |
234 | union { | |
235 | struct metadata_dst dst; | |
236 | char buf[sizeof(struct metadata_dst) + 256]; | |
237 | } buf; | |
a19920cc | 238 | |
e23775f2 PS |
239 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
240 | __be16 flags; | |
b13c9440 | 241 | |
e23775f2 PS |
242 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | |
243 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
244 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
a19920cc | 245 | |
e23775f2 | 246 | tun_dst = &buf.dst; |
a5d59bf3 | 247 | ovs_udp_tun_rx_dst(tun_dst, |
f2252c61 PS |
248 | skb, geneve_get_sk_family(gs), flags, |
249 | vni_to_tunnel_id(gnvh->vni), | |
250 | gnvh->opt_len * 4); | |
251 | if (!tun_dst) | |
252 | goto drop; | |
e23775f2 PS |
253 | /* Update tunnel dst according to Geneve options. */ |
254 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, | |
255 | gnvh->options, gnvh->opt_len * 4); | |
256 | } else { | |
257 | /* Drop packets w/ critical options, | |
258 | * since we don't support any... | |
259 | */ | |
e23775f2 PS |
260 | if (gnvh->critical) |
261 | goto drop; | |
262 | } | |
263 | ||
264 | skb_reset_mac_header(skb); | |
e23775f2 PS |
265 | skb->protocol = eth_type_trans(skb, geneve->dev); |
266 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
267 | ||
268 | if (tun_dst) | |
269 | ovs_skb_dst_set(skb, &tun_dst->dst); | |
f2252c61 | 270 | |
e23775f2 PS |
271 | /* Ignore packet loops (and multicast echo) */ |
272 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) | |
273 | goto drop; | |
274 | ||
f2252c61 | 275 | oiph = skb_network_header(skb); |
e23775f2 PS |
276 | skb_reset_network_header(skb); |
277 | ||
f2252c61 PS |
278 | if (geneve_get_sk_family(gs) == AF_INET) |
279 | err = IP_ECN_decapsulate(oiph, skb); | |
280 | #if IS_ENABLED(CONFIG_IPV6) | |
281 | else | |
282 | err = IP6_ECN_decapsulate(oiph, skb); | |
283 | #endif | |
284 | if (unlikely(err > 1)) { | |
285 | ++geneve->dev->stats.rx_frame_errors; | |
286 | ++geneve->dev->stats.rx_errors; | |
287 | goto drop; | |
e23775f2 | 288 | } |
a19920cc | 289 | |
f2252c61 | 290 | stats = this_cpu_ptr(geneve->dev->tstats); |
e23775f2 PS |
291 | u64_stats_update_begin(&stats->syncp); |
292 | stats->rx_packets++; | |
293 | stats->rx_bytes += skb->len; | |
294 | u64_stats_update_end(&stats->syncp); | |
f2252c61 PS |
295 | |
296 | netdev_port_receive(skb, skb_tunnel_info(skb)); | |
e23775f2 PS |
297 | return; |
298 | drop: | |
299 | /* Consume bad packet */ | |
300 | kfree_skb(skb); | |
301 | } | |
302 | ||
e23775f2 PS |
303 | /* Setup stats when device is created */ |
304 | static int geneve_init(struct net_device *dev) | |
305 | { | |
e02c0ed7 PS |
306 | struct geneve_dev *geneve = netdev_priv(dev); |
307 | int err; | |
308 | ||
f2252c61 | 309 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e23775f2 PS |
310 | if (!dev->tstats) |
311 | return -ENOMEM; | |
312 | ||
e02c0ed7 PS |
313 | err = dst_cache_init(&geneve->dst_cache, GFP_KERNEL); |
314 | if (err) { | |
315 | free_percpu(dev->tstats); | |
316 | return err; | |
317 | } | |
318 | ||
e23775f2 | 319 | return 0; |
a19920cc | 320 | } |
e23775f2 PS |
321 | |
322 | static void geneve_uninit(struct net_device *dev) | |
323 | { | |
e02c0ed7 PS |
324 | struct geneve_dev *geneve = netdev_priv(dev); |
325 | ||
326 | dst_cache_destroy(&geneve->dst_cache); | |
e23775f2 PS |
327 | free_percpu(dev->tstats); |
328 | } | |
a19920cc JG |
329 | |
330 | /* Callback from net/ipv4/udp.c to receive packets */ | |
331 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
332 | { | |
333 | struct genevehdr *geneveh; | |
f2252c61 | 334 | struct geneve_dev *geneve; |
a19920cc JG |
335 | struct geneve_sock *gs; |
336 | int opts_len; | |
337 | ||
338 | /* Need Geneve and inner Ethernet header to be present */ | |
339 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) | |
2b3397eb | 340 | goto drop; |
a19920cc JG |
341 | |
342 | /* Return packets with reserved bits set */ | |
343 | geneveh = geneve_hdr(skb); | |
a19920cc | 344 | if (unlikely(geneveh->ver != GENEVE_VER)) |
2b3397eb | 345 | goto drop; |
a19920cc JG |
346 | |
347 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
2b3397eb | 348 | goto drop; |
a19920cc | 349 | |
a19920cc JG |
350 | gs = rcu_dereference_sk_user_data(sk); |
351 | if (!gs) | |
352 | goto drop; | |
353 | ||
f2252c61 PS |
354 | #if IS_ENABLED(CONFIG_IPV6) |
355 | #ifdef OVS_CHECK_UDP_TUNNEL_ZERO_CSUM | |
356 | if (geneve_get_sk_family(gs) == AF_INET6 && | |
357 | !udp_hdr(skb)->check && | |
358 | !(gs->flags & GENEVE_F_UDP_ZERO_CSUM6_RX)) { | |
359 | udp6_csum_zero_error(skb); | |
360 | goto drop; | |
361 | } | |
362 | #endif | |
363 | #endif | |
364 | geneve = geneve_lookup_skb(gs, skb); | |
365 | if (!geneve) | |
366 | goto drop; | |
367 | ||
368 | opts_len = geneveh->opt_len * 4; | |
369 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
370 | htons(ETH_P_TEB), | |
371 | !net_eq(geneve->net, dev_net(geneve->dev)))) | |
372 | goto drop; | |
373 | ||
374 | geneve_rx(geneve, gs, skb); | |
a19920cc JG |
375 | return 0; |
376 | ||
377 | drop: | |
378 | /* Consume bad packet */ | |
379 | kfree_skb(skb); | |
380 | return 0; | |
a19920cc JG |
381 | } |
382 | ||
383 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, | |
f2252c61 | 384 | __be16 port, u32 flags) |
a19920cc JG |
385 | { |
386 | struct socket *sock; | |
387 | struct udp_port_cfg udp_conf; | |
388 | int err; | |
389 | ||
390 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
391 | ||
392 | if (ipv6) { | |
393 | udp_conf.family = AF_INET6; | |
f2252c61 PS |
394 | udp_conf.ipv6_v6only = 1; |
395 | udp_conf.use_udp6_rx_checksums = | |
396 | !(flags & GENEVE_F_UDP_ZERO_CSUM6_RX); | |
a19920cc JG |
397 | } else { |
398 | udp_conf.family = AF_INET; | |
399 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
400 | } | |
401 | ||
402 | udp_conf.local_udp_port = port; | |
403 | ||
404 | /* Open UDP socket */ | |
405 | err = udp_sock_create(net, &udp_conf, &sock); | |
406 | if (err < 0) | |
407 | return ERR_PTR(err); | |
408 | ||
409 | return sock; | |
410 | } | |
411 | ||
e23775f2 PS |
412 | static void geneve_notify_add_rx_port(struct geneve_sock *gs) |
413 | { | |
f2252c61 PS |
414 | #ifdef HAVE_NDO_ADD_GENEVE_PORT |
415 | struct net_device *dev; | |
416 | struct sock *sk = gs->sock->sk; | |
417 | struct net *net = sock_net(sk); | |
418 | sa_family_t sa_family = geneve_get_sk_family(gs); | |
419 | __be16 port = inet_sk(sk)->inet_sport; | |
420 | ||
421 | rcu_read_lock(); | |
422 | for_each_netdev_rcu(net, dev) { | |
423 | if (dev->netdev_ops->ndo_add_geneve_port) | |
424 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, | |
425 | port); | |
426 | } | |
427 | rcu_read_unlock(); | |
428 | #else | |
429 | #ifdef HAVE_UDP_OFFLOAD | |
e23775f2 PS |
430 | struct sock *sk = gs->sock->sk; |
431 | sa_family_t sa_family = sk->sk_family; | |
432 | int err; | |
433 | ||
434 | if (sa_family == AF_INET) { | |
435 | err = udp_add_offload(&gs->udp_offloads); | |
436 | if (err) | |
437 | pr_warn("geneve: udp_add_offload failed with status %d\n", | |
438 | err); | |
439 | } | |
f2252c61 PS |
440 | #endif |
441 | #endif | |
442 | ||
443 | } | |
444 | ||
445 | static void geneve_notify_del_rx_port(struct geneve_sock *gs) | |
446 | { | |
447 | #ifdef HAVE_NDO_ADD_GENEVE_PORT | |
448 | struct net_device *dev; | |
449 | struct sock *sk = gs->sock->sk; | |
450 | struct net *net = sock_net(sk); | |
451 | sa_family_t sa_family = geneve_get_sk_family(gs); | |
452 | __be16 port = inet_sk(sk)->inet_sport; | |
453 | ||
454 | rcu_read_lock(); | |
455 | for_each_netdev_rcu(net, dev) { | |
456 | if (dev->netdev_ops->ndo_del_geneve_port) | |
457 | dev->netdev_ops->ndo_del_geneve_port(dev, sa_family, | |
458 | port); | |
459 | } | |
460 | ||
461 | rcu_read_unlock(); | |
462 | #else | |
463 | #ifdef HAVE_UDP_OFFLOAD | |
464 | struct sock *sk = gs->sock->sk; | |
465 | sa_family_t sa_family = sk->sk_family; | |
466 | ||
467 | if (sa_family == AF_INET) | |
468 | udp_del_offload(&gs->udp_offloads); | |
469 | #endif | |
470 | ||
471 | #endif | |
e23775f2 PS |
472 | } |
473 | ||
f2252c61 PS |
474 | #if defined(HAVE_UDP_OFFLOAD) || \ |
475 | defined(HAVE_UDP_TUNNEL_SOCK_CFG_GRO_RECEIVE) | |
476 | ||
e23775f2 PS |
477 | static int geneve_hlen(struct genevehdr *gh) |
478 | { | |
479 | return sizeof(*gh) + gh->opt_len * 4; | |
480 | } | |
481 | ||
482 | #ifndef HAVE_UDP_OFFLOAD_ARG_UOFF | |
483 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
484 | struct sk_buff *skb) | |
485 | #else | |
486 | static struct sk_buff **geneve_gro_receive(struct sk_buff **head, | |
487 | struct sk_buff *skb, | |
488 | struct udp_offload *uoff) | |
489 | #endif | |
490 | { | |
491 | struct sk_buff *p, **pp = NULL; | |
492 | struct genevehdr *gh, *gh2; | |
493 | unsigned int hlen, gh_len, off_gnv; | |
494 | const struct packet_offload *ptype; | |
495 | __be16 type; | |
496 | int flush = 1; | |
497 | ||
498 | off_gnv = skb_gro_offset(skb); | |
499 | hlen = off_gnv + sizeof(*gh); | |
500 | gh = skb_gro_header_fast(skb, off_gnv); | |
501 | if (skb_gro_header_hard(skb, hlen)) { | |
502 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
503 | if (unlikely(!gh)) | |
504 | goto out; | |
505 | } | |
506 | ||
507 | if (gh->ver != GENEVE_VER || gh->oam) | |
508 | goto out; | |
509 | gh_len = geneve_hlen(gh); | |
510 | ||
511 | hlen = off_gnv + gh_len; | |
512 | if (skb_gro_header_hard(skb, hlen)) { | |
513 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
514 | if (unlikely(!gh)) | |
515 | goto out; | |
516 | } | |
517 | ||
e23775f2 PS |
518 | for (p = *head; p; p = p->next) { |
519 | if (!NAPI_GRO_CB(p)->same_flow) | |
520 | continue; | |
521 | ||
522 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
523 | if (gh->opt_len != gh2->opt_len || | |
524 | memcmp(gh, gh2, gh_len)) { | |
525 | NAPI_GRO_CB(p)->same_flow = 0; | |
526 | continue; | |
527 | } | |
528 | } | |
529 | ||
530 | type = gh->proto_type; | |
531 | ||
532 | rcu_read_lock(); | |
533 | ptype = gro_find_receive_by_type(type); | |
f2252c61 | 534 | if (!ptype) |
e23775f2 | 535 | goto out_unlock; |
e23775f2 PS |
536 | |
537 | skb_gro_pull(skb, gh_len); | |
538 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
539 | pp = ptype->callbacks.gro_receive(head, skb); | |
f2252c61 | 540 | flush = 0; |
e23775f2 PS |
541 | |
542 | out_unlock: | |
543 | rcu_read_unlock(); | |
544 | out: | |
545 | NAPI_GRO_CB(skb)->flush |= flush; | |
546 | ||
547 | return pp; | |
548 | } | |
549 | ||
550 | #ifndef HAVE_UDP_OFFLOAD_ARG_UOFF | |
551 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff) | |
552 | #else | |
553 | static int geneve_gro_complete(struct sk_buff *skb, int nhoff, | |
554 | struct udp_offload *uoff) | |
555 | #endif | |
556 | { | |
557 | struct genevehdr *gh; | |
558 | struct packet_offload *ptype; | |
559 | __be16 type; | |
560 | int gh_len; | |
561 | int err = -ENOSYS; | |
562 | ||
563 | udp_tunnel_gro_complete(skb, nhoff); | |
564 | ||
565 | gh = (struct genevehdr *)(skb->data + nhoff); | |
566 | gh_len = geneve_hlen(gh); | |
567 | type = gh->proto_type; | |
568 | ||
569 | rcu_read_lock(); | |
570 | ptype = gro_find_complete_by_type(type); | |
571 | if (ptype) | |
572 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
573 | ||
574 | rcu_read_unlock(); | |
cc3af88e PS |
575 | |
576 | skb_set_inner_mac_header(skb, nhoff + gh_len); | |
e23775f2 PS |
577 | return err; |
578 | } | |
579 | #endif | |
580 | ||
a19920cc JG |
581 | /* Create new listen socket if needed */ |
582 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
f2252c61 | 583 | bool ipv6, u32 flags) |
a19920cc | 584 | { |
e23775f2 | 585 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
a19920cc JG |
586 | struct geneve_sock *gs; |
587 | struct socket *sock; | |
588 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
e23775f2 | 589 | int h; |
a19920cc JG |
590 | |
591 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
592 | if (!gs) | |
593 | return ERR_PTR(-ENOMEM); | |
594 | ||
f2252c61 | 595 | sock = geneve_create_sock(net, ipv6, port, flags); |
a19920cc JG |
596 | if (IS_ERR(sock)) { |
597 | kfree(gs); | |
598 | return ERR_CAST(sock); | |
599 | } | |
600 | ||
601 | gs->sock = sock; | |
e23775f2 PS |
602 | gs->refcnt = 1; |
603 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
604 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
a19920cc | 605 | |
e23775f2 PS |
606 | /* Initialize the geneve udp offloads structure */ |
607 | #ifdef HAVE_UDP_OFFLOAD | |
608 | gs->udp_offloads.port = port; | |
609 | gs->udp_offloads.callbacks.gro_receive = geneve_gro_receive; | |
610 | gs->udp_offloads.callbacks.gro_complete = geneve_gro_complete; | |
e23775f2 | 611 | #endif |
f2252c61 PS |
612 | |
613 | geneve_notify_add_rx_port(gs); | |
a19920cc | 614 | /* Mark socket as an encapsulation socket */ |
f2252c61 | 615 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
a19920cc JG |
616 | tunnel_cfg.sk_user_data = gs; |
617 | tunnel_cfg.encap_type = 1; | |
f2252c61 PS |
618 | #ifdef HAVE_UDP_TUNNEL_SOCK_CFG_GRO_RECEIVE |
619 | tunnel_cfg.gro_receive = geneve_gro_receive; | |
620 | tunnel_cfg.gro_complete = geneve_gro_complete; | |
621 | #endif | |
a19920cc JG |
622 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; |
623 | tunnel_cfg.encap_destroy = NULL; | |
624 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e23775f2 | 625 | list_add(&gs->list, &gn->sock_list); |
a19920cc JG |
626 | return gs; |
627 | } | |
628 | ||
f2252c61 | 629 | static void __geneve_sock_release(struct geneve_sock *gs) |
a19920cc | 630 | { |
f2252c61 | 631 | if (!gs || --gs->refcnt) |
e23775f2 PS |
632 | return; |
633 | ||
634 | list_del(&gs->list); | |
635 | geneve_notify_del_rx_port(gs); | |
a19920cc | 636 | udp_tunnel_sock_release(gs->sock); |
f2252c61 PS |
637 | kfree_rcu(gs, rcu); |
638 | } | |
639 | ||
640 | static void geneve_sock_release(struct geneve_dev *geneve) | |
641 | { | |
642 | __geneve_sock_release(geneve->sock4); | |
643 | #if IS_ENABLED(CONFIG_IPV6) | |
644 | __geneve_sock_release(geneve->sock6); | |
645 | #endif | |
a19920cc | 646 | } |
15c69d2d | 647 | |
e23775f2 | 648 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
f2252c61 | 649 | sa_family_t family, |
e23775f2 PS |
650 | __be16 dst_port) |
651 | { | |
652 | struct geneve_sock *gs; | |
653 | ||
654 | list_for_each_entry(gs, &gn->sock_list, list) { | |
8063e095 | 655 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && |
f2252c61 | 656 | geneve_get_sk_family(gs) == family) { |
e23775f2 PS |
657 | return gs; |
658 | } | |
659 | } | |
660 | return NULL; | |
661 | } | |
662 | ||
f2252c61 | 663 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
e23775f2 | 664 | { |
e23775f2 PS |
665 | struct net *net = geneve->net; |
666 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
667 | struct geneve_sock *gs; | |
668 | __u32 hash; | |
669 | ||
f2252c61 | 670 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->dst_port); |
e23775f2 PS |
671 | if (gs) { |
672 | gs->refcnt++; | |
673 | goto out; | |
674 | } | |
675 | ||
f2252c61 | 676 | gs = geneve_socket_create(net, geneve->dst_port, ipv6, geneve->flags); |
e23775f2 PS |
677 | if (IS_ERR(gs)) |
678 | return PTR_ERR(gs); | |
679 | ||
680 | out: | |
681 | gs->collect_md = geneve->collect_md; | |
f2252c61 PS |
682 | gs->flags = geneve->flags; |
683 | #if IS_ENABLED(CONFIG_IPV6) | |
684 | if (ipv6) | |
685 | geneve->sock6 = gs; | |
686 | else | |
687 | #endif | |
688 | geneve->sock4 = gs; | |
e23775f2 PS |
689 | |
690 | hash = geneve_net_vni_hash(geneve->vni); | |
691 | hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]); | |
692 | return 0; | |
693 | } | |
694 | ||
f2252c61 PS |
695 | static int geneve_open(struct net_device *dev) |
696 | { | |
697 | struct geneve_dev *geneve = netdev_priv(dev); | |
698 | bool ipv6 = geneve->remote.sa.sa_family == AF_INET6; | |
699 | bool metadata = geneve->collect_md; | |
700 | int ret = 0; | |
701 | ||
702 | geneve->sock4 = NULL; | |
703 | #if IS_ENABLED(CONFIG_IPV6) | |
704 | geneve->sock6 = NULL; | |
705 | if (ipv6 || metadata) | |
706 | ret = geneve_sock_add(geneve, true); | |
707 | #endif | |
708 | ||
709 | if (!ret && (!ipv6 || metadata)) | |
710 | ret = geneve_sock_add(geneve, false); | |
711 | if (ret < 0) | |
712 | geneve_sock_release(geneve); | |
713 | ||
714 | return ret; | |
715 | } | |
716 | ||
e23775f2 PS |
717 | static int geneve_stop(struct net_device *dev) |
718 | { | |
719 | struct geneve_dev *geneve = netdev_priv(dev); | |
e23775f2 PS |
720 | |
721 | if (!hlist_unhashed(&geneve->hlist)) | |
722 | hlist_del_rcu(&geneve->hlist); | |
f2252c61 | 723 | geneve_sock_release(geneve); |
e23775f2 PS |
724 | return 0; |
725 | } | |
726 | ||
f2252c61 PS |
727 | static void geneve_build_header(struct genevehdr *geneveh, |
728 | __be16 tun_flags, u8 vni[3], | |
729 | u8 options_len, u8 *options) | |
730 | { | |
731 | geneveh->ver = GENEVE_VER; | |
732 | geneveh->opt_len = options_len / 4; | |
733 | geneveh->oam = !!(tun_flags & TUNNEL_OAM); | |
734 | geneveh->critical = !!(tun_flags & TUNNEL_CRIT_OPT); | |
735 | geneveh->rsvd1 = 0; | |
736 | memcpy(geneveh->vni, vni, 3); | |
737 | geneveh->proto_type = htons(ETH_P_TEB); | |
738 | geneveh->rsvd2 = 0; | |
739 | ||
740 | memcpy(geneveh->options, options, options_len); | |
741 | } | |
742 | ||
e23775f2 PS |
743 | static int geneve_build_skb(struct rtable *rt, struct sk_buff *skb, |
744 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
f2252c61 | 745 | u32 flags, bool xnet) |
e23775f2 PS |
746 | { |
747 | struct genevehdr *gnvh; | |
748 | int min_headroom; | |
749 | int err; | |
f2252c61 PS |
750 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM_TX); |
751 | ||
752 | skb_scrub_packet(skb, xnet); | |
e23775f2 | 753 | |
8063e095 | 754 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
f2252c61 | 755 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct iphdr); |
e23775f2 | 756 | err = skb_cow_head(skb, min_headroom); |
cf5789aa | 757 | if (unlikely(err)) |
e23775f2 | 758 | goto free_rt; |
e23775f2 | 759 | |
06aeda48 | 760 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
cf5789aa | 761 | if (err) |
e23775f2 | 762 | goto free_rt; |
f2252c61 | 763 | |
e23775f2 | 764 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); |
f2252c61 | 765 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); |
e23775f2 PS |
766 | |
767 | ovs_skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
768 | return 0; | |
769 | ||
770 | free_rt: | |
771 | ip_rt_put(rt); | |
772 | return err; | |
773 | } | |
774 | ||
f2252c61 PS |
775 | #if IS_ENABLED(CONFIG_IPV6) |
776 | static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb, | |
777 | __be16 tun_flags, u8 vni[3], u8 opt_len, u8 *opt, | |
778 | u32 flags, bool xnet) | |
779 | { | |
780 | struct genevehdr *gnvh; | |
781 | int min_headroom; | |
782 | int err; | |
783 | bool udp_sum = !(flags & GENEVE_F_UDP_ZERO_CSUM6_TX); | |
784 | ||
785 | skb_scrub_packet(skb, xnet); | |
786 | ||
787 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len | |
788 | + GENEVE_BASE_HLEN + opt_len + sizeof(struct ipv6hdr); | |
789 | err = skb_cow_head(skb, min_headroom); | |
790 | if (unlikely(err)) | |
791 | goto free_dst; | |
792 | ||
06aeda48 | 793 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
f2252c61 PS |
794 | if (err) |
795 | goto free_dst; | |
796 | ||
797 | gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); | |
798 | geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); | |
799 | ||
800 | ovs_skb_set_inner_protocol(skb, htons(ETH_P_TEB)); | |
801 | return 0; | |
802 | ||
803 | free_dst: | |
804 | dst_release(dst); | |
805 | return err; | |
806 | } | |
807 | #endif | |
808 | ||
809 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
810 | struct net_device *dev, | |
811 | struct flowi4 *fl4, | |
812 | struct ip_tunnel_info *info) | |
e23775f2 | 813 | { |
e02c0ed7 | 814 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e23775f2 | 815 | struct geneve_dev *geneve = netdev_priv(dev); |
e02c0ed7 | 816 | struct dst_cache *dst_cache; |
e23775f2 PS |
817 | struct rtable *rt = NULL; |
818 | __u8 tos; | |
819 | ||
820 | memset(fl4, 0, sizeof(*fl4)); | |
821 | fl4->flowi4_mark = skb->mark; | |
822 | fl4->flowi4_proto = IPPROTO_UDP; | |
823 | ||
824 | if (info) { | |
825 | fl4->daddr = info->key.u.ipv4.dst; | |
826 | fl4->saddr = info->key.u.ipv4.src; | |
827 | fl4->flowi4_tos = RT_TOS(info->key.tos); | |
e02c0ed7 | 828 | dst_cache = &info->dst_cache; |
e23775f2 PS |
829 | } else { |
830 | tos = geneve->tos; | |
831 | if (tos == 1) { | |
832 | const struct iphdr *iip = ip_hdr(skb); | |
833 | ||
834 | tos = ip_tunnel_get_dsfield(iip, skb); | |
e02c0ed7 | 835 | use_cache = false; |
e23775f2 PS |
836 | } |
837 | ||
838 | fl4->flowi4_tos = RT_TOS(tos); | |
f2252c61 | 839 | fl4->daddr = geneve->remote.sin.sin_addr.s_addr; |
e02c0ed7 PS |
840 | dst_cache = &geneve->dst_cache; |
841 | } | |
842 | ||
843 | if (use_cache) { | |
844 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
845 | if (rt) | |
846 | return rt; | |
e23775f2 PS |
847 | } |
848 | ||
849 | rt = ip_route_output_key(geneve->net, fl4); | |
850 | if (IS_ERR(rt)) { | |
851 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
aad7cb91 | 852 | return ERR_PTR(-ENETUNREACH); |
e23775f2 | 853 | } |
8063e095 | 854 | if (rt->dst.dev == dev) { /* is this necessary? */ |
e23775f2 | 855 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); |
e23775f2 | 856 | ip_rt_put(rt); |
aad7cb91 | 857 | return ERR_PTR(-ELOOP); |
e23775f2 | 858 | } |
e02c0ed7 PS |
859 | if (use_cache) |
860 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e23775f2 PS |
861 | return rt; |
862 | } | |
863 | ||
f2252c61 PS |
864 | #if IS_ENABLED(CONFIG_IPV6) |
865 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
866 | struct net_device *dev, | |
867 | struct flowi6 *fl6, | |
868 | struct ip_tunnel_info *info) | |
869 | { | |
e02c0ed7 | 870 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
f2252c61 PS |
871 | struct geneve_dev *geneve = netdev_priv(dev); |
872 | struct geneve_sock *gs6 = geneve->sock6; | |
873 | struct dst_entry *dst = NULL; | |
e02c0ed7 | 874 | struct dst_cache *dst_cache; |
f2252c61 PS |
875 | __u8 prio; |
876 | ||
877 | memset(fl6, 0, sizeof(*fl6)); | |
878 | fl6->flowi6_mark = skb->mark; | |
879 | fl6->flowi6_proto = IPPROTO_UDP; | |
880 | ||
881 | if (info) { | |
882 | fl6->daddr = info->key.u.ipv6.dst; | |
883 | fl6->saddr = info->key.u.ipv6.src; | |
884 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(info->key.tos), | |
885 | info->key.label); | |
e02c0ed7 | 886 | dst_cache = &info->dst_cache; |
f2252c61 PS |
887 | } else { |
888 | prio = geneve->tos; | |
889 | if (prio == 1) { | |
890 | const struct iphdr *iip = ip_hdr(skb); | |
891 | ||
892 | prio = ip_tunnel_get_dsfield(iip, skb); | |
e02c0ed7 | 893 | use_cache = false; |
f2252c61 PS |
894 | } |
895 | ||
896 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), | |
897 | geneve->label); | |
898 | fl6->daddr = geneve->remote.sin6.sin6_addr; | |
e02c0ed7 PS |
899 | dst_cache = &geneve->dst_cache; |
900 | } | |
901 | ||
902 | if (use_cache) { | |
903 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
904 | if (dst) | |
905 | return dst; | |
f2252c61 PS |
906 | } |
907 | ||
908 | #ifdef HAVE_IPV6_DST_LOOKUP_NET | |
909 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { | |
910 | #else | |
911 | #ifdef HAVE_IPV6_STUB | |
912 | if (ipv6_stub->ipv6_dst_lookup(gs6->sock->sk, &dst, fl6)) { | |
913 | #else | |
914 | if (ip6_dst_lookup(gs6->sock->sk, &dst, fl6)) { | |
915 | #endif | |
916 | #endif | |
917 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
918 | return ERR_PTR(-ENETUNREACH); | |
919 | } | |
920 | if (dst->dev == dev) { /* is this necessary? */ | |
921 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
922 | dst_release(dst); | |
923 | return ERR_PTR(-ELOOP); | |
924 | } | |
925 | ||
e02c0ed7 PS |
926 | if (use_cache) |
927 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
f2252c61 PS |
928 | return dst; |
929 | } | |
930 | #endif | |
931 | ||
e23775f2 PS |
932 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
933 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
934 | { | |
935 | #ifdef __BIG_ENDIAN | |
936 | vni[0] = (__force __u8)(tun_id >> 16); | |
937 | vni[1] = (__force __u8)(tun_id >> 8); | |
938 | vni[2] = (__force __u8)tun_id; | |
939 | #else | |
940 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
941 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
942 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
943 | #endif | |
944 | } | |
945 | ||
f2252c61 PS |
946 | static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
947 | struct ip_tunnel_info *info) | |
e23775f2 | 948 | { |
e23775f2 | 949 | struct geneve_dev *geneve = netdev_priv(dev); |
f2252c61 | 950 | struct geneve_sock *gs4 = geneve->sock4; |
e23775f2 PS |
951 | struct rtable *rt = NULL; |
952 | const struct iphdr *iip; /* interior IP header */ | |
aad7cb91 | 953 | int err = -EINVAL; |
e23775f2 PS |
954 | struct flowi4 fl4; |
955 | __u8 tos, ttl; | |
956 | __be16 sport; | |
e23775f2 | 957 | __be16 df; |
f2252c61 PS |
958 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
959 | u32 flags = geneve->flags; | |
e23775f2 PS |
960 | |
961 | if (geneve->collect_md) { | |
f2252c61 | 962 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { |
e23775f2 PS |
963 | netdev_dbg(dev, "no tunnel metadata\n"); |
964 | goto tx_error; | |
965 | } | |
966 | if (info && ip_tunnel_info_af(info) != AF_INET) | |
967 | goto tx_error; | |
968 | } | |
969 | ||
f2252c61 | 970 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); |
e23775f2 | 971 | if (IS_ERR(rt)) { |
aad7cb91 | 972 | err = PTR_ERR(rt); |
e23775f2 PS |
973 | goto tx_error; |
974 | } | |
975 | ||
976 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
977 | skb_reset_mac_header(skb); | |
978 | ||
979 | iip = ip_hdr(skb); | |
980 | ||
981 | if (info) { | |
982 | const struct ip_tunnel_key *key = &info->key; | |
983 | u8 *opts = NULL; | |
984 | u8 vni[3]; | |
985 | ||
986 | tunnel_id_to_vni(key->tun_id, vni); | |
f2252c61 | 987 | if (info->options_len) |
e23775f2 PS |
988 | opts = ip_tunnel_info_opts(info); |
989 | ||
f2252c61 PS |
990 | if (key->tun_flags & TUNNEL_CSUM) |
991 | flags &= ~GENEVE_F_UDP_ZERO_CSUM_TX; | |
992 | else | |
993 | flags |= GENEVE_F_UDP_ZERO_CSUM_TX; | |
994 | ||
e23775f2 | 995 | err = geneve_build_skb(rt, skb, key->tun_flags, vni, |
f2252c61 | 996 | info->options_len, opts, flags, xnet); |
e23775f2 | 997 | if (unlikely(err)) |
cf5789aa | 998 | goto tx_error; |
e23775f2 PS |
999 | |
1000 | tos = ip_tunnel_ecn_encap(key->tos, iip, skb); | |
1001 | ttl = key->ttl; | |
1002 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
1003 | } else { | |
e23775f2 | 1004 | err = geneve_build_skb(rt, skb, 0, geneve->vni, |
f2252c61 | 1005 | 0, NULL, flags, xnet); |
e23775f2 | 1006 | if (unlikely(err)) |
cf5789aa | 1007 | goto tx_error; |
e23775f2 PS |
1008 | |
1009 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, iip, skb); | |
1010 | ttl = geneve->ttl; | |
1011 | if (!ttl && IN_MULTICAST(ntohl(fl4.daddr))) | |
1012 | ttl = 1; | |
8063e095 | 1013 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
e23775f2 PS |
1014 | df = 0; |
1015 | } | |
f2252c61 | 1016 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
43dd2fce | 1017 | tos, ttl, df, sport, geneve->dst_port, |
f2252c61 PS |
1018 | !net_eq(geneve->net, dev_net(geneve->dev)), |
1019 | !!(flags & GENEVE_F_UDP_ZERO_CSUM_TX)); | |
1020 | ||
e23775f2 PS |
1021 | return NETDEV_TX_OK; |
1022 | ||
1023 | tx_error: | |
1024 | dev_kfree_skb(skb); | |
cf5789aa | 1025 | |
aad7cb91 PS |
1026 | if (err == -ELOOP) |
1027 | dev->stats.collisions++; | |
1028 | else if (err == -ENETUNREACH) | |
1029 | dev->stats.tx_carrier_errors++; | |
43038e79 PS |
1030 | |
1031 | dev->stats.tx_errors++; | |
e23775f2 PS |
1032 | return NETDEV_TX_OK; |
1033 | } | |
f2252c61 PS |
1034 | |
1035 | #if IS_ENABLED(CONFIG_IPV6) | |
1036 | static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, | |
1037 | struct ip_tunnel_info *info) | |
1038 | { | |
1039 | struct geneve_dev *geneve = netdev_priv(dev); | |
1040 | struct geneve_sock *gs6 = geneve->sock6; | |
1041 | struct dst_entry *dst = NULL; | |
1042 | const struct iphdr *iip; /* interior IP header */ | |
1043 | int err = -EINVAL; | |
1044 | struct flowi6 fl6; | |
1045 | __u8 prio, ttl; | |
1046 | __be16 sport; | |
1047 | __be32 label; | |
1048 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); | |
1049 | u32 flags = geneve->flags; | |
1050 | ||
1051 | if (geneve->collect_md) { | |
1052 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
1053 | netdev_dbg(dev, "no tunnel metadata\n"); | |
1054 | goto tx_error; | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1059 | if (IS_ERR(dst)) { | |
1060 | err = PTR_ERR(dst); | |
1061 | goto tx_error; | |
1062 | } | |
1063 | ||
1064 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); | |
1065 | skb_reset_mac_header(skb); | |
1066 | ||
1067 | iip = ip_hdr(skb); | |
1068 | ||
1069 | if (info) { | |
1070 | const struct ip_tunnel_key *key = &info->key; | |
1071 | u8 *opts = NULL; | |
1072 | u8 vni[3]; | |
1073 | ||
1074 | tunnel_id_to_vni(key->tun_id, vni); | |
1075 | if (info->options_len) | |
1076 | opts = ip_tunnel_info_opts(info); | |
1077 | ||
1078 | if (key->tun_flags & TUNNEL_CSUM) | |
1079 | flags &= ~GENEVE_F_UDP_ZERO_CSUM6_TX; | |
1080 | else | |
1081 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; | |
1082 | ||
1083 | err = geneve6_build_skb(dst, skb, key->tun_flags, vni, | |
1084 | info->options_len, opts, | |
1085 | flags, xnet); | |
1086 | if (unlikely(err)) | |
1087 | goto tx_error; | |
1088 | ||
1089 | prio = ip_tunnel_ecn_encap(key->tos, iip, skb); | |
1090 | ttl = key->ttl; | |
1091 | label = info->key.label; | |
1092 | } else { | |
1093 | err = geneve6_build_skb(dst, skb, 0, geneve->vni, | |
1094 | 0, NULL, flags, xnet); | |
1095 | if (unlikely(err)) | |
1096 | goto tx_error; | |
1097 | ||
1098 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), | |
1099 | iip, skb); | |
1100 | ttl = geneve->ttl; | |
1101 | if (!ttl && ipv6_addr_is_multicast(&fl6.daddr)) | |
1102 | ttl = 1; | |
1103 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
1104 | label = geneve->label; | |
1105 | } | |
1106 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, | |
1107 | &fl6.saddr, &fl6.daddr, prio, ttl, label, | |
1108 | sport, geneve->dst_port, | |
1109 | !!(flags & GENEVE_F_UDP_ZERO_CSUM6_TX)); | |
1110 | return NETDEV_TX_OK; | |
1111 | ||
1112 | tx_error: | |
1113 | dev_kfree_skb(skb); | |
1114 | ||
1115 | if (err == -ELOOP) | |
1116 | dev->stats.collisions++; | |
1117 | else if (err == -ENETUNREACH) | |
1118 | dev->stats.tx_carrier_errors++; | |
43038e79 PS |
1119 | |
1120 | dev->stats.tx_errors++; | |
f2252c61 PS |
1121 | return NETDEV_TX_OK; |
1122 | } | |
1123 | #endif | |
1124 | ||
1125 | netdev_tx_t rpl_geneve_xmit(struct sk_buff *skb) | |
1126 | { | |
1127 | struct net_device *dev = skb->dev; | |
1128 | struct geneve_dev *geneve = netdev_priv(dev); | |
1129 | struct ip_tunnel_info *info = NULL; | |
1130 | ||
1131 | if (geneve->collect_md) | |
1132 | info = skb_tunnel_info(skb); | |
1133 | ||
1134 | #if IS_ENABLED(CONFIG_IPV6) | |
1135 | if ((info && ip_tunnel_info_af(info) == AF_INET6) || | |
1136 | (!info && geneve->remote.sa.sa_family == AF_INET6)) | |
1137 | return geneve6_xmit_skb(skb, dev, info); | |
1138 | #endif | |
1139 | return geneve_xmit_skb(skb, dev, info); | |
1140 | } | |
1141 | EXPORT_SYMBOL_GPL(rpl_geneve_xmit); | |
e23775f2 PS |
1142 | |
1143 | static netdev_tx_t geneve_dev_xmit(struct sk_buff *skb, struct net_device *dev) | |
1144 | { | |
1145 | /* Drop All packets coming from networking stack. OVS-CB is | |
1146 | * not initialized for these packets. | |
1147 | */ | |
1148 | ||
1149 | dev_kfree_skb(skb); | |
1150 | dev->stats.tx_dropped++; | |
1151 | return NETDEV_TX_OK; | |
1152 | } | |
1153 | ||
917b3b45 | 1154 | static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict) |
ef1d4fc0 | 1155 | { |
917b3b45 DW |
1156 | /* The max_mtu calculation does not take account of GENEVE |
1157 | * options, to avoid excluding potentially valid | |
1158 | * configurations. | |
ef1d4fc0 | 1159 | */ |
917b3b45 | 1160 | int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - sizeof(struct iphdr) |
f2252c61 | 1161 | - dev->hard_header_len; |
917b3b45 DW |
1162 | |
1163 | if (new_mtu < 68) | |
ef1d4fc0 | 1164 | return -EINVAL; |
917b3b45 DW |
1165 | |
1166 | if (new_mtu > max_mtu) { | |
1167 | if (strict) | |
1168 | return -EINVAL; | |
1169 | ||
1170 | new_mtu = max_mtu; | |
1171 | } | |
1172 | ||
ef1d4fc0 DW |
1173 | dev->mtu = new_mtu; |
1174 | return 0; | |
1175 | } | |
1176 | ||
917b3b45 DW |
1177 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
1178 | { | |
1179 | return __geneve_change_mtu(dev, new_mtu, true); | |
1180 | } | |
1181 | ||
aad7cb91 PS |
1182 | int ovs_geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1183 | { | |
1184 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1185 | struct geneve_dev *geneve = netdev_priv(dev); | |
1186 | struct rtable *rt; | |
1187 | struct flowi4 fl4; | |
362f222d PS |
1188 | #if IS_ENABLED(CONFIG_IPV6) |
1189 | struct dst_entry *dst; | |
1190 | struct flowi6 fl6; | |
1191 | #endif | |
aad7cb91 | 1192 | |
362f222d PS |
1193 | if (ip_tunnel_info_af(info) == AF_INET) { |
1194 | rt = geneve_get_v4_rt(skb, dev, &fl4, info); | |
1195 | if (IS_ERR(rt)) | |
1196 | return PTR_ERR(rt); | |
aad7cb91 | 1197 | |
362f222d PS |
1198 | ip_rt_put(rt); |
1199 | info->key.u.ipv4.src = fl4.saddr; | |
1200 | #if IS_ENABLED(CONFIG_IPV6) | |
1201 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
1202 | dst = geneve_get_v6_dst(skb, dev, &fl6, info); | |
1203 | if (IS_ERR(dst)) | |
1204 | return PTR_ERR(dst); | |
1205 | ||
1206 | dst_release(dst); | |
1207 | info->key.u.ipv6.src = fl6.saddr; | |
1208 | #endif | |
1209 | } else { | |
1210 | return -EINVAL; | |
1211 | } | |
aad7cb91 | 1212 | |
aad7cb91 PS |
1213 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1214 | 1, USHRT_MAX, true); | |
1215 | info->key.tp_dst = geneve->dst_port; | |
1216 | return 0; | |
1217 | } | |
1218 | EXPORT_SYMBOL_GPL(ovs_geneve_fill_metadata_dst); | |
1219 | ||
e23775f2 | 1220 | static const struct net_device_ops geneve_netdev_ops = { |
e23775f2 PS |
1221 | .ndo_init = geneve_init, |
1222 | .ndo_uninit = geneve_uninit, | |
e23775f2 PS |
1223 | .ndo_open = geneve_open, |
1224 | .ndo_stop = geneve_stop, | |
1225 | .ndo_start_xmit = geneve_dev_xmit, | |
f2252c61 | 1226 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
ef1d4fc0 | 1227 | .ndo_change_mtu = geneve_change_mtu, |
e23775f2 PS |
1228 | .ndo_validate_addr = eth_validate_addr, |
1229 | .ndo_set_mac_address = eth_mac_addr, | |
aad7cb91 | 1230 | #ifdef HAVE_NDO_FILL_METADATA_DST |
f2252c61 | 1231 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
aad7cb91 | 1232 | #endif |
e23775f2 PS |
1233 | }; |
1234 | ||
1235 | static void geneve_get_drvinfo(struct net_device *dev, | |
1236 | struct ethtool_drvinfo *drvinfo) | |
1237 | { | |
1238 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1239 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1240 | } | |
1241 | ||
1242 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1243 | .get_drvinfo = geneve_get_drvinfo, | |
1244 | .get_link = ethtool_op_get_link, | |
1245 | }; | |
1246 | ||
1247 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1248 | static struct device_type geneve_type = { | |
1249 | .name = "geneve", | |
1250 | }; | |
1251 | ||
f2252c61 PS |
1252 | /* Calls the ndo_add_geneve_port of the caller in order to |
1253 | * supply the listening GENEVE udp ports. Callers are expected | |
1254 | * to implement the ndo_add_geneve_port. | |
1255 | */ | |
1256 | static void geneve_push_rx_ports(struct net_device *dev) | |
1257 | { | |
1258 | #ifdef HAVE_NDO_ADD_GENEVE_PORT | |
1259 | struct net *net = dev_net(dev); | |
1260 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1261 | struct geneve_sock *gs; | |
1262 | sa_family_t sa_family; | |
1263 | struct sock *sk; | |
1264 | __be16 port; | |
1265 | ||
1266 | if (!dev->netdev_ops->ndo_add_geneve_port) | |
1267 | return; | |
1268 | ||
1269 | rcu_read_lock(); | |
1270 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { | |
1271 | sk = gs->sock->sk; | |
1272 | sa_family = sk->sk_family; | |
1273 | port = inet_sk(sk)->inet_sport; | |
1274 | dev->netdev_ops->ndo_add_geneve_port(dev, sa_family, port); | |
1275 | } | |
1276 | rcu_read_unlock(); | |
1277 | #endif | |
1278 | } | |
1279 | ||
e23775f2 PS |
1280 | /* Initialize the device structure. */ |
1281 | static void geneve_setup(struct net_device *dev) | |
1282 | { | |
1283 | ether_setup(dev); | |
1284 | ||
1285 | dev->netdev_ops = &geneve_netdev_ops; | |
1286 | dev->ethtool_ops = &geneve_ethtool_ops; | |
1287 | dev->destructor = free_netdev; | |
1288 | ||
1289 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1290 | ||
1291 | dev->features |= NETIF_F_LLTX; | |
1292 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1293 | dev->features |= NETIF_F_RXCSUM; | |
1294 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1295 | ||
e23775f2 PS |
1296 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1297 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
f2252c61 | 1298 | |
e23775f2 | 1299 | #if 0 |
e23775f2 PS |
1300 | netif_keep_dst(dev); |
1301 | #endif | |
f2252c61 | 1302 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
e23775f2 PS |
1303 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
1304 | eth_hw_addr_random(dev); | |
1305 | } | |
1306 | ||
1307 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1308 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1309 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
f2252c61 | 1310 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
e23775f2 PS |
1311 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
1312 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, | |
f2252c61 | 1313 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
e23775f2 PS |
1314 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
1315 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, | |
f2252c61 PS |
1316 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1317 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1318 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
e23775f2 PS |
1319 | }; |
1320 | ||
1321 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1322 | { | |
1323 | if (tb[IFLA_ADDRESS]) { | |
1324 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1325 | return -EINVAL; | |
1326 | ||
1327 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1328 | return -EADDRNOTAVAIL; | |
1329 | } | |
1330 | ||
1331 | if (!data) | |
1332 | return -EINVAL; | |
1333 | ||
1334 | if (data[IFLA_GENEVE_ID]) { | |
1335 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1336 | ||
1337 | if (vni >= GENEVE_VID_MASK) | |
1338 | return -ERANGE; | |
1339 | } | |
1340 | ||
1341 | return 0; | |
1342 | } | |
1343 | ||
1344 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, | |
1345 | __be16 dst_port, | |
f2252c61 | 1346 | union geneve_addr *remote, |
e23775f2 PS |
1347 | u8 vni[], |
1348 | bool *tun_on_same_port, | |
1349 | bool *tun_collect_md) | |
1350 | { | |
1351 | struct geneve_dev *geneve, *t; | |
1352 | ||
1353 | *tun_on_same_port = false; | |
1354 | *tun_collect_md = false; | |
1355 | t = NULL; | |
1356 | list_for_each_entry(geneve, &gn->geneve_list, next) { | |
1357 | if (geneve->dst_port == dst_port) { | |
1358 | *tun_collect_md = geneve->collect_md; | |
1359 | *tun_on_same_port = true; | |
1360 | } | |
1361 | if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) && | |
f2252c61 | 1362 | !memcmp(remote, &geneve->remote, sizeof(geneve->remote)) && |
e23775f2 PS |
1363 | dst_port == geneve->dst_port) |
1364 | t = geneve; | |
1365 | } | |
1366 | return t; | |
1367 | } | |
1368 | ||
1369 | static int geneve_configure(struct net *net, struct net_device *dev, | |
f2252c61 PS |
1370 | union geneve_addr *remote, |
1371 | __u32 vni, __u8 ttl, __u8 tos, __be32 label, | |
1372 | __be16 dst_port, bool metadata, u32 flags) | |
e23775f2 PS |
1373 | { |
1374 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1375 | struct geneve_dev *t, *geneve = netdev_priv(dev); | |
1376 | bool tun_collect_md, tun_on_same_port; | |
f2252c61 | 1377 | int err, encap_len; |
e23775f2 | 1378 | |
f2252c61 PS |
1379 | if (!remote) |
1380 | return -EINVAL; | |
1381 | if (metadata && | |
1382 | (remote->sa.sa_family != AF_UNSPEC || vni || tos || ttl || label)) | |
1383 | return -EINVAL; | |
e23775f2 PS |
1384 | |
1385 | geneve->net = net; | |
1386 | geneve->dev = dev; | |
1387 | ||
1388 | geneve->vni[0] = (vni & 0x00ff0000) >> 16; | |
1389 | geneve->vni[1] = (vni & 0x0000ff00) >> 8; | |
1390 | geneve->vni[2] = vni & 0x000000ff; | |
1391 | ||
f2252c61 PS |
1392 | if ((remote->sa.sa_family == AF_INET && |
1393 | IN_MULTICAST(ntohl(remote->sin.sin_addr.s_addr))) || | |
1394 | (remote->sa.sa_family == AF_INET6 && | |
1395 | ipv6_addr_is_multicast(&remote->sin6.sin6_addr))) | |
1396 | return -EINVAL; | |
1397 | if (label && remote->sa.sa_family != AF_INET6) | |
e23775f2 PS |
1398 | return -EINVAL; |
1399 | ||
f2252c61 PS |
1400 | geneve->remote = *remote; |
1401 | ||
e23775f2 PS |
1402 | geneve->ttl = ttl; |
1403 | geneve->tos = tos; | |
f2252c61 | 1404 | geneve->label = label; |
e23775f2 PS |
1405 | geneve->dst_port = dst_port; |
1406 | geneve->collect_md = metadata; | |
f2252c61 | 1407 | geneve->flags = flags; |
e23775f2 | 1408 | |
f2252c61 | 1409 | t = geneve_find_dev(gn, dst_port, remote, geneve->vni, |
e23775f2 PS |
1410 | &tun_on_same_port, &tun_collect_md); |
1411 | if (t) | |
1412 | return -EBUSY; | |
1413 | ||
f2252c61 PS |
1414 | /* make enough headroom for basic scenario */ |
1415 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
1416 | if (remote->sa.sa_family == AF_INET) | |
1417 | encap_len += sizeof(struct iphdr); | |
1418 | else | |
1419 | encap_len += sizeof(struct ipv6hdr); | |
1420 | dev->needed_headroom = encap_len + ETH_HLEN; | |
1421 | ||
e23775f2 PS |
1422 | if (metadata) { |
1423 | if (tun_on_same_port) | |
1424 | return -EPERM; | |
1425 | } else { | |
1426 | if (tun_collect_md) | |
1427 | return -EPERM; | |
1428 | } | |
1429 | ||
e02c0ed7 PS |
1430 | dst_cache_reset(&geneve->dst_cache); |
1431 | ||
e23775f2 PS |
1432 | err = register_netdevice(dev); |
1433 | if (err) | |
1434 | return err; | |
1435 | ||
1436 | list_add(&geneve->next, &gn->geneve_list); | |
1437 | return 0; | |
1438 | } | |
1439 | ||
e23775f2 PS |
1440 | static int geneve_newlink(struct net *net, struct net_device *dev, |
1441 | struct nlattr *tb[], struct nlattr *data[]) | |
1442 | { | |
e23775f2 PS |
1443 | __be16 dst_port = htons(GENEVE_UDP_PORT); |
1444 | __u8 ttl = 0, tos = 0; | |
1445 | bool metadata = false; | |
f2252c61 PS |
1446 | union geneve_addr remote = geneve_remote_unspec; |
1447 | __be32 label = 0; | |
1448 | __u32 vni = 0; | |
1449 | u32 flags = 0; | |
e23775f2 | 1450 | |
f2252c61 | 1451 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) |
e23775f2 PS |
1452 | return -EINVAL; |
1453 | ||
f2252c61 PS |
1454 | if (data[IFLA_GENEVE_REMOTE]) { |
1455 | remote.sa.sa_family = AF_INET; | |
1456 | remote.sin.sin_addr.s_addr = | |
1457 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); | |
1458 | } | |
1459 | ||
1460 | if (data[IFLA_GENEVE_REMOTE6]) { | |
1461 | if (!IS_ENABLED(CONFIG_IPV6)) | |
1462 | return -EPFNOSUPPORT; | |
1463 | ||
1464 | remote.sa.sa_family = AF_INET6; | |
1465 | remote.sin6.sin6_addr = | |
1466 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); | |
1467 | ||
1468 | if (ipv6_addr_type(&remote.sin6.sin6_addr) & | |
1469 | IPV6_ADDR_LINKLOCAL) { | |
1470 | netdev_dbg(dev, "link-local remote is unsupported\n"); | |
1471 | return -EINVAL; | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | if (data[IFLA_GENEVE_ID]) | |
1476 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
e23775f2 PS |
1477 | |
1478 | if (data[IFLA_GENEVE_TTL]) | |
1479 | ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); | |
1480 | ||
1481 | if (data[IFLA_GENEVE_TOS]) | |
1482 | tos = nla_get_u8(data[IFLA_GENEVE_TOS]); | |
1483 | ||
f2252c61 PS |
1484 | if (data[IFLA_GENEVE_LABEL]) |
1485 | label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & | |
1486 | IPV6_FLOWLABEL_MASK; | |
1487 | ||
e23775f2 PS |
1488 | if (data[IFLA_GENEVE_PORT]) |
1489 | dst_port = nla_get_be16(data[IFLA_GENEVE_PORT]); | |
1490 | ||
1491 | if (data[IFLA_GENEVE_COLLECT_METADATA]) | |
1492 | metadata = true; | |
1493 | ||
f2252c61 PS |
1494 | if (data[IFLA_GENEVE_UDP_CSUM] && |
1495 | !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) | |
1496 | flags |= GENEVE_F_UDP_ZERO_CSUM_TX; | |
1497 | ||
1498 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] && | |
1499 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) | |
1500 | flags |= GENEVE_F_UDP_ZERO_CSUM6_TX; | |
1501 | ||
1502 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX] && | |
1503 | nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) | |
1504 | flags |= GENEVE_F_UDP_ZERO_CSUM6_RX; | |
1505 | ||
1506 | return geneve_configure(net, dev, &remote, vni, ttl, tos, label, | |
1507 | dst_port, metadata, flags); | |
e23775f2 PS |
1508 | } |
1509 | ||
e23775f2 | 1510 | static void geneve_dellink(struct net_device *dev, struct list_head *head) |
e23775f2 PS |
1511 | { |
1512 | struct geneve_dev *geneve = netdev_priv(dev); | |
1513 | ||
1514 | list_del(&geneve->next); | |
1515 | unregister_netdevice_queue(dev, head); | |
1516 | } | |
1517 | ||
1518 | static size_t geneve_get_size(const struct net_device *dev) | |
1519 | { | |
1520 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
f2252c61 | 1521 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
e23775f2 PS |
1522 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
1523 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ | |
f2252c61 | 1524 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
e23775f2 PS |
1525 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
1526 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ | |
f2252c61 PS |
1527 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1528 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1529 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
e23775f2 PS |
1530 | 0; |
1531 | } | |
1532 | ||
1533 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1534 | { | |
1535 | struct geneve_dev *geneve = netdev_priv(dev); | |
1536 | __u32 vni; | |
1537 | ||
1538 | vni = (geneve->vni[0] << 16) | (geneve->vni[1] << 8) | geneve->vni[2]; | |
1539 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) | |
1540 | goto nla_put_failure; | |
1541 | ||
f2252c61 PS |
1542 | if (geneve->remote.sa.sa_family == AF_INET) { |
1543 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, | |
1544 | geneve->remote.sin.sin_addr.s_addr)) | |
1545 | goto nla_put_failure; | |
1546 | #if IS_ENABLED(CONFIG_IPV6) | |
1547 | } else { | |
1548 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, | |
1549 | &geneve->remote.sin6.sin6_addr)) | |
1550 | goto nla_put_failure; | |
1551 | #endif | |
1552 | } | |
e23775f2 PS |
1553 | |
1554 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, geneve->ttl) || | |
f2252c61 PS |
1555 | nla_put_u8(skb, IFLA_GENEVE_TOS, geneve->tos) || |
1556 | nla_put_be32(skb, IFLA_GENEVE_LABEL, geneve->label)) | |
e23775f2 PS |
1557 | goto nla_put_failure; |
1558 | ||
1559 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, geneve->dst_port)) | |
1560 | goto nla_put_failure; | |
1561 | ||
1562 | if (geneve->collect_md) { | |
1563 | if (nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) | |
1564 | goto nla_put_failure; | |
1565 | } | |
1566 | ||
f2252c61 PS |
1567 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
1568 | !(geneve->flags & GENEVE_F_UDP_ZERO_CSUM_TX)) || | |
1569 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, | |
1570 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_TX)) || | |
1571 | nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, | |
1572 | !!(geneve->flags & GENEVE_F_UDP_ZERO_CSUM6_RX))) | |
1573 | goto nla_put_failure; | |
1574 | ||
e23775f2 PS |
1575 | return 0; |
1576 | ||
1577 | nla_put_failure: | |
1578 | return -EMSGSIZE; | |
1579 | } | |
1580 | ||
1581 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
f2252c61 | 1582 | .kind = "geneve", |
e23775f2 PS |
1583 | .maxtype = IFLA_GENEVE_MAX, |
1584 | .policy = geneve_policy, | |
1585 | .priv_size = sizeof(struct geneve_dev), | |
1586 | .setup = geneve_setup, | |
1587 | .validate = geneve_validate, | |
1588 | .newlink = geneve_newlink, | |
1589 | .dellink = geneve_dellink, | |
1590 | .get_size = geneve_get_size, | |
1591 | .fill_info = geneve_fill_info, | |
1592 | }; | |
1593 | ||
1594 | struct net_device *rpl_geneve_dev_create_fb(struct net *net, const char *name, | |
f2252c61 | 1595 | u8 name_assign_type, u16 dst_port) |
e23775f2 PS |
1596 | { |
1597 | struct nlattr *tb[IFLA_MAX + 1]; | |
1598 | struct net_device *dev; | |
7cecb9c9 | 1599 | LIST_HEAD(list_kill); |
e23775f2 PS |
1600 | int err; |
1601 | ||
1602 | memset(tb, 0, sizeof(tb)); | |
f2252c61 | 1603 | dev = rtnl_create_link(net, name, name_assign_type, |
e23775f2 PS |
1604 | &geneve_link_ops, tb); |
1605 | if (IS_ERR(dev)) | |
1606 | return dev; | |
1607 | ||
f2252c61 PS |
1608 | err = geneve_configure(net, dev, &geneve_remote_unspec, |
1609 | 0, 0, 0, 0, htons(dst_port), true, | |
1610 | GENEVE_F_UDP_ZERO_CSUM6_RX); | |
7cecb9c9 PS |
1611 | if (err) { |
1612 | free_netdev(dev); | |
1613 | return ERR_PTR(err); | |
1614 | } | |
06f1a61a DW |
1615 | |
1616 | /* openvswitch users expect packet sizes to be unrestricted, | |
1617 | * so set the largest MTU we can. | |
1618 | */ | |
917b3b45 | 1619 | err = __geneve_change_mtu(dev, IP_MAX_MTU, false); |
06f1a61a DW |
1620 | if (err) |
1621 | goto err; | |
1622 | ||
74d56f0b PS |
1623 | err = rtnl_configure_link(dev, NULL); |
1624 | if (err < 0) | |
1625 | goto err; | |
1626 | ||
e23775f2 | 1627 | return dev; |
06f1a61a | 1628 | |
f2252c61 | 1629 | err: |
7cecb9c9 PS |
1630 | geneve_dellink(dev, &list_kill); |
1631 | unregister_netdevice_many(&list_kill); | |
06f1a61a | 1632 | return ERR_PTR(err); |
e23775f2 PS |
1633 | } |
1634 | EXPORT_SYMBOL_GPL(rpl_geneve_dev_create_fb); | |
1635 | ||
f2252c61 PS |
1636 | static int geneve_netdevice_event(struct notifier_block *unused, |
1637 | unsigned long event, void *ptr) | |
1638 | { | |
1639 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1640 | ||
1641 | if (event == NETDEV_OFFLOAD_PUSH_GENEVE) | |
1642 | geneve_push_rx_ports(dev); | |
1643 | ||
1644 | return NOTIFY_DONE; | |
1645 | } | |
1646 | ||
1647 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1648 | .notifier_call = geneve_netdevice_event, | |
1649 | }; | |
1650 | ||
e23775f2 PS |
1651 | static __net_init int geneve_init_net(struct net *net) |
1652 | { | |
1653 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1654 | ||
1655 | INIT_LIST_HEAD(&gn->geneve_list); | |
1656 | INIT_LIST_HEAD(&gn->sock_list); | |
1657 | return 0; | |
1658 | } | |
1659 | ||
1660 | static void __net_exit geneve_exit_net(struct net *net) | |
1661 | { | |
1662 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1663 | struct geneve_dev *geneve, *next; | |
1664 | struct net_device *dev, *aux; | |
1665 | LIST_HEAD(list); | |
1666 | ||
1667 | rtnl_lock(); | |
1668 | ||
1669 | /* gather any geneve devices that were moved into this ns */ | |
1670 | for_each_netdev_safe(net, dev, aux) | |
1671 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
1672 | unregister_netdevice_queue(dev, &list); | |
1673 | ||
1674 | /* now gather any other geneve devices that were created in this ns */ | |
1675 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1676 | /* If geneve->dev is in the same netns, it was already added | |
1677 | * to the list by the previous loop. | |
1678 | */ | |
1679 | if (!net_eq(dev_net(geneve->dev), net)) | |
1680 | unregister_netdevice_queue(geneve->dev, &list); | |
1681 | } | |
1682 | ||
1683 | /* unregister the devices gathered above */ | |
1684 | unregister_netdevice_many(&list); | |
1685 | rtnl_unlock(); | |
1686 | } | |
1687 | ||
1688 | static struct pernet_operations geneve_net_ops = { | |
1689 | .init = geneve_init_net, | |
1690 | .exit = geneve_exit_net, | |
1691 | .id = &geneve_net_id, | |
1692 | .size = sizeof(struct geneve_net), | |
1693 | }; | |
1694 | ||
e23775f2 PS |
1695 | int rpl_geneve_init_module(void) |
1696 | { | |
1697 | int rc; | |
1698 | ||
1699 | rc = register_pernet_subsys(&geneve_net_ops); | |
1700 | if (rc) | |
1701 | goto out1; | |
1702 | ||
f2252c61 | 1703 | rc = register_netdevice_notifier(&geneve_notifier_block); |
e23775f2 PS |
1704 | if (rc) |
1705 | goto out2; | |
1706 | ||
f2252c61 PS |
1707 | rc = rtnl_link_register(&geneve_link_ops); |
1708 | if (rc) | |
1709 | goto out3; | |
1710 | ||
e23775f2 PS |
1711 | pr_info("Geneve tunneling driver\n"); |
1712 | return 0; | |
f2252c61 PS |
1713 | |
1714 | out3: | |
1715 | unregister_netdevice_notifier(&geneve_notifier_block); | |
e23775f2 PS |
1716 | out2: |
1717 | unregister_pernet_subsys(&geneve_net_ops); | |
1718 | out1: | |
1719 | return rc; | |
1720 | } | |
1721 | ||
1722 | void rpl_geneve_cleanup_module(void) | |
1723 | { | |
1724 | rtnl_link_unregister(&geneve_link_ops); | |
f2252c61 | 1725 | unregister_netdevice_notifier(&geneve_notifier_block); |
e23775f2 PS |
1726 | unregister_pernet_subsys(&geneve_net_ops); |
1727 | } | |
f2252c61 | 1728 | |
e23775f2 | 1729 | #endif |