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Commit | Line | Data |
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d342894c | 1 | /* |
eb5ce439 | 2 | * VXLAN: Virtual eXtensible Local Area Network |
d342894c | 3 | * |
3b8df3c6 | 4 | * Copyright (c) 2012-2013 Vyatta Inc. |
d342894c | 5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
d342894c | 9 | */ |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
d342894c | 14 | #include <linux/module.h> |
15 | #include <linux/errno.h> | |
16 | #include <linux/slab.h> | |
d342894c | 17 | #include <linux/udp.h> |
18 | #include <linux/igmp.h> | |
11cd9476 | 19 | #include <linux/inetdevice.h> |
d342894c | 20 | #include <linux/if_ether.h> |
1b13c97f | 21 | #include <linux/ethtool.h> |
e4f67add DS |
22 | #include <net/arp.h> |
23 | #include <net/ndisc.h> | |
d342894c | 24 | #include <net/ip.h> |
25 | #include <net/icmp.h> | |
d342894c | 26 | #include <net/rtnetlink.h> |
d342894c | 27 | #include <net/inet_ecn.h> |
28 | #include <net/net_namespace.h> | |
29 | #include <net/netns/generic.h> | |
012a5729 | 30 | #include <net/vxlan.h> |
40d29af0 | 31 | |
e4c7ed41 | 32 | #if IS_ENABLED(CONFIG_IPV6) |
e4c7ed41 | 33 | #include <net/ip6_tunnel.h> |
660d98ca | 34 | #include <net/ip6_checksum.h> |
e4c7ed41 | 35 | #endif |
d342894c | 36 | |
37 | #define VXLAN_VERSION "0.1" | |
38 | ||
553675fb | 39 | #define PORT_HASH_BITS 8 |
40 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 41 | #define FDB_AGE_DEFAULT 300 /* 5 min */ |
42 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
43 | ||
23c578bf | 44 | /* UDP port for VXLAN traffic. |
45 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 46 | * for compatibility with early adopters. |
23c578bf | 47 | */ |
9daaa397 SH |
48 | static unsigned short vxlan_port __read_mostly = 8472; |
49 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 50 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
51 | ||
52 | static bool log_ecn_error = true; | |
53 | module_param(log_ecn_error, bool, 0644); | |
54 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
55 | ||
c7d03a00 | 56 | static unsigned int vxlan_net_id; |
0dfbdf41 | 57 | static struct rtnl_link_ops vxlan_link_ops; |
553675fb | 58 | |
7256eac1 | 59 | static const u8 all_zeros_mac[ETH_ALEN + 2]; |
afbd8bae | 60 | |
205f356d | 61 | static int vxlan_sock_add(struct vxlan_dev *vxlan); |
614732ea | 62 | |
a53cb29b MB |
63 | static void vxlan_vs_del_dev(struct vxlan_dev *vxlan); |
64 | ||
553675fb | 65 | /* per-network namespace private data for this module */ |
66 | struct vxlan_net { | |
67 | struct list_head vxlan_list; | |
68 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 69 | spinlock_t sock_lock; |
553675fb | 70 | }; |
71 | ||
d342894c | 72 | /* Forwarding table entry */ |
73 | struct vxlan_fdb { | |
74 | struct hlist_node hlist; /* linked list of entries */ | |
75 | struct rcu_head rcu; | |
76 | unsigned long updated; /* jiffies */ | |
77 | unsigned long used; | |
3e61aa8f | 78 | struct list_head remotes; |
7177a3b0 | 79 | u8 eth_addr[ETH_ALEN]; |
d342894c | 80 | u16 state; /* see ndm_state */ |
3ad7a4b1 | 81 | __be32 vni; |
ae884082 | 82 | u8 flags; /* see ndm_flags */ |
d342894c | 83 | }; |
84 | ||
d342894c | 85 | /* salt for hash table */ |
86 | static u32 vxlan_salt __read_mostly; | |
87 | ||
ee122c79 TG |
88 | static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
89 | { | |
e7030878 TG |
90 | return vs->flags & VXLAN_F_COLLECT_METADATA || |
91 | ip_tunnel_collect_metadata(); | |
ee122c79 TG |
92 | } |
93 | ||
11cd9476 JV |
94 | static struct ip_fan_map *vxlan_fan_find_map(struct vxlan_dev *vxlan, __be32 daddr) |
95 | { | |
96 | struct ip_fan_map *fan_map; | |
97 | ||
98 | rcu_read_lock(); | |
99 | list_for_each_entry_rcu(fan_map, &vxlan->fan.fan_maps, list) { | |
100 | if (fan_map->overlay == | |
101 | (daddr & inet_make_mask(fan_map->overlay_prefix))) { | |
102 | rcu_read_unlock(); | |
103 | return fan_map; | |
104 | } | |
105 | } | |
106 | rcu_read_unlock(); | |
107 | ||
108 | return NULL; | |
109 | } | |
110 | ||
111 | static void vxlan_fan_flush_map(struct vxlan_dev *vxlan) | |
112 | { | |
113 | struct ip_fan_map *fan_map; | |
114 | ||
115 | list_for_each_entry_rcu(fan_map, &vxlan->fan.fan_maps, list) { | |
116 | list_del_rcu(&fan_map->list); | |
117 | kfree_rcu(fan_map, rcu); | |
118 | } | |
119 | } | |
120 | ||
121 | static int vxlan_fan_del_map(struct vxlan_dev *vxlan, __be32 overlay) | |
122 | { | |
123 | struct ip_fan_map *fan_map; | |
124 | ||
125 | fan_map = vxlan_fan_find_map(vxlan, overlay); | |
126 | if (!fan_map) | |
127 | return -ENOENT; | |
128 | ||
129 | list_del_rcu(&fan_map->list); | |
130 | kfree_rcu(fan_map, rcu); | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static int vxlan_fan_add_map(struct vxlan_dev *vxlan, struct ifla_fan_map *map) | |
136 | { | |
137 | __be32 overlay_mask, underlay_mask; | |
138 | struct ip_fan_map *fan_map; | |
139 | ||
140 | overlay_mask = inet_make_mask(map->overlay_prefix); | |
141 | underlay_mask = inet_make_mask(map->underlay_prefix); | |
142 | ||
143 | netdev_dbg(vxlan->dev, "vfam: map: o %x/%d u %x/%d om %x um %x\n", | |
144 | map->overlay, map->overlay_prefix, | |
145 | map->underlay, map->underlay_prefix, | |
146 | overlay_mask, underlay_mask); | |
147 | ||
148 | if ((map->overlay & ~overlay_mask) || (map->underlay & ~underlay_mask)) | |
149 | return -EINVAL; | |
150 | ||
151 | if (!(map->overlay & overlay_mask) && (map->underlay & underlay_mask)) | |
152 | return -EINVAL; | |
153 | ||
154 | /* Special case: overlay 0 and underlay 0: flush all mappings */ | |
155 | if (!map->overlay && !map->underlay) { | |
156 | vxlan_fan_flush_map(vxlan); | |
157 | return 0; | |
158 | } | |
159 | ||
160 | /* Special case: overlay set and underlay 0: clear map for overlay */ | |
161 | if (!map->underlay) | |
162 | return vxlan_fan_del_map(vxlan, map->overlay); | |
163 | ||
164 | if (vxlan_fan_find_map(vxlan, map->overlay)) | |
165 | return -EEXIST; | |
166 | ||
167 | fan_map = kmalloc(sizeof(*fan_map), GFP_KERNEL); | |
168 | fan_map->underlay = map->underlay; | |
169 | fan_map->overlay = map->overlay; | |
170 | fan_map->underlay_prefix = map->underlay_prefix; | |
171 | fan_map->overlay_mask = ntohl(overlay_mask); | |
172 | fan_map->overlay_prefix = map->overlay_prefix; | |
173 | ||
174 | list_add_tail_rcu(&fan_map->list, &vxlan->fan.fan_maps); | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static int vxlan_parse_fan_map(struct nlattr *data[], struct vxlan_dev *vxlan) | |
180 | { | |
181 | struct ifla_fan_map *map; | |
182 | struct nlattr *attr; | |
183 | int rem, rv; | |
184 | ||
185 | nla_for_each_nested(attr, data[IFLA_IPTUN_FAN_MAP], rem) { | |
186 | map = nla_data(attr); | |
187 | rv = vxlan_fan_add_map(vxlan, map); | |
188 | if (rv) | |
189 | return rv; | |
190 | } | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | static int vxlan_fan_build_rdst(struct vxlan_dev *vxlan, struct sk_buff *skb, | |
196 | struct vxlan_rdst *fan_rdst) | |
197 | { | |
198 | struct ip_fan_map *f_map; | |
199 | union vxlan_addr *va; | |
200 | u32 daddr, underlay; | |
201 | struct arphdr *arp; | |
202 | void *arp_ptr; | |
203 | struct ethhdr *eth; | |
204 | struct iphdr *iph; | |
205 | ||
206 | eth = eth_hdr(skb); | |
207 | switch (eth->h_proto) { | |
208 | case htons(ETH_P_IP): | |
209 | iph = ip_hdr(skb); | |
210 | if (!iph) | |
211 | return -EINVAL; | |
212 | daddr = iph->daddr; | |
213 | break; | |
214 | case htons(ETH_P_ARP): | |
215 | arp = arp_hdr(skb); | |
216 | if (!arp) | |
217 | return -EINVAL; | |
218 | arp_ptr = arp + 1; | |
219 | netdev_dbg(vxlan->dev, | |
220 | "vfbr: arp sha %pM sip %pI4 tha %pM tip %pI4\n", | |
221 | arp_ptr, arp_ptr + skb->dev->addr_len, | |
222 | arp_ptr + skb->dev->addr_len + 4, | |
223 | arp_ptr + (skb->dev->addr_len * 2) + 4); | |
224 | arp_ptr += (skb->dev->addr_len * 2) + 4; | |
225 | memcpy(&daddr, arp_ptr, 4); | |
226 | break; | |
227 | default: | |
228 | netdev_dbg(vxlan->dev, "vfbr: unknown eth p %x\n", eth->h_proto); | |
229 | return -EINVAL; | |
230 | } | |
231 | ||
232 | f_map = vxlan_fan_find_map(vxlan, daddr); | |
233 | if (!f_map) | |
234 | return -EINVAL; | |
235 | ||
236 | daddr = ntohl(daddr); | |
237 | underlay = ntohl(f_map->underlay); | |
238 | if (!underlay) | |
239 | return -EINVAL; | |
240 | ||
241 | memset(fan_rdst, 0, sizeof(*fan_rdst)); | |
242 | va = &fan_rdst->remote_ip; | |
243 | va->sa.sa_family = AF_INET; | |
244 | fan_rdst->remote_vni = vxlan->default_dst.remote_vni; | |
245 | va->sin.sin_addr.s_addr = htonl(underlay | | |
246 | ((daddr & ~f_map->overlay_mask) >> | |
247 | (32 - f_map->overlay_prefix - | |
248 | (32 - f_map->underlay_prefix)))); | |
249 | netdev_dbg(vxlan->dev, "vfbr: daddr %x ul %x dst %x\n", | |
250 | daddr, underlay, va->sin.sin_addr.s_addr); | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
e4c7ed41 CW |
255 | #if IS_ENABLED(CONFIG_IPV6) |
256 | static inline | |
257 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
258 | { | |
f0ef3126 JB |
259 | if (a->sa.sa_family != b->sa.sa_family) |
260 | return false; | |
261 | if (a->sa.sa_family == AF_INET6) | |
262 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
263 | else | |
264 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
e4c7ed41 CW |
265 | } |
266 | ||
267 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
268 | { | |
f0ef3126 JB |
269 | if (ipa->sa.sa_family == AF_INET6) |
270 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
271 | else | |
272 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
e4c7ed41 CW |
273 | } |
274 | ||
275 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
276 | { | |
f0ef3126 JB |
277 | if (ipa->sa.sa_family == AF_INET6) |
278 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
279 | else | |
280 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
e4c7ed41 CW |
281 | } |
282 | ||
283 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
284 | { | |
f0ef3126 | 285 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
67b61f6c | 286 | ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
f0ef3126 JB |
287 | ip->sa.sa_family = AF_INET6; |
288 | return 0; | |
289 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 290 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
291 | ip->sa.sa_family = AF_INET; |
292 | return 0; | |
293 | } else { | |
294 | return -EAFNOSUPPORT; | |
295 | } | |
e4c7ed41 CW |
296 | } |
297 | ||
298 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 299 | const union vxlan_addr *ip) |
e4c7ed41 | 300 | { |
f0ef3126 | 301 | if (ip->sa.sa_family == AF_INET6) |
930345ea | 302 | return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
f0ef3126 | 303 | else |
930345ea | 304 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
305 | } |
306 | ||
307 | #else /* !CONFIG_IPV6 */ | |
308 | ||
309 | static inline | |
310 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
311 | { | |
f0ef3126 | 312 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
e4c7ed41 CW |
313 | } |
314 | ||
315 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
316 | { | |
f0ef3126 | 317 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); |
e4c7ed41 CW |
318 | } |
319 | ||
320 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
321 | { | |
f0ef3126 | 322 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); |
e4c7ed41 CW |
323 | } |
324 | ||
325 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
326 | { | |
f0ef3126 JB |
327 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
328 | return -EAFNOSUPPORT; | |
329 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 330 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
331 | ip->sa.sa_family = AF_INET; |
332 | return 0; | |
333 | } else { | |
334 | return -EAFNOSUPPORT; | |
335 | } | |
e4c7ed41 CW |
336 | } |
337 | ||
338 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 339 | const union vxlan_addr *ip) |
e4c7ed41 | 340 | { |
930345ea | 341 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
342 | } |
343 | #endif | |
344 | ||
553675fb | 345 | /* Virtual Network hash table head */ |
54bfd872 | 346 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni) |
553675fb | 347 | { |
54bfd872 | 348 | return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)]; |
553675fb | 349 | } |
350 | ||
351 | /* Socket hash table head */ | |
352 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 353 | { |
354 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
355 | ||
553675fb | 356 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
357 | } | |
358 | ||
3e61aa8f SH |
359 | /* First remote destination for a forwarding entry. |
360 | * Guaranteed to be non-NULL because remotes are never deleted. | |
361 | */ | |
5ca5461c | 362 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 363 | { |
5ca5461c | 364 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
365 | } | |
366 | ||
367 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
368 | { | |
369 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
370 | } |
371 | ||
ac5132d1 TG |
372 | /* Find VXLAN socket based on network namespace, address family and UDP port |
373 | * and enabled unshareable flags. | |
374 | */ | |
375 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
376 | __be16 port, u32 flags) | |
553675fb | 377 | { |
378 | struct vxlan_sock *vs; | |
af33c1ad TH |
379 | |
380 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 381 | |
382 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 383 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
705cc62f | 384 | vxlan_get_sk_family(vs) == family && |
af33c1ad | 385 | vs->flags == flags) |
553675fb | 386 | return vs; |
387 | } | |
388 | return NULL; | |
d342894c | 389 | } |
390 | ||
49f810f0 MS |
391 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, int ifindex, |
392 | __be32 vni) | |
d342894c | 393 | { |
69e76661 | 394 | struct vxlan_dev_node *node; |
d342894c | 395 | |
b9167b2e JB |
396 | /* For flow based devices, map all packets to VNI 0 */ |
397 | if (vs->flags & VXLAN_F_COLLECT_METADATA) | |
398 | vni = 0; | |
399 | ||
69e76661 JB |
400 | hlist_for_each_entry_rcu(node, vni_head(vs, vni), hlist) { |
401 | if (node->vxlan->default_dst.remote_vni != vni) | |
49f810f0 MS |
402 | continue; |
403 | ||
404 | if (IS_ENABLED(CONFIG_IPV6)) { | |
69e76661 | 405 | const struct vxlan_config *cfg = &node->vxlan->cfg; |
49f810f0 MS |
406 | |
407 | if ((cfg->flags & VXLAN_F_IPV6_LINKLOCAL) && | |
408 | cfg->remote_ifindex != ifindex) | |
409 | continue; | |
410 | } | |
411 | ||
69e76661 | 412 | return node->vxlan; |
d342894c | 413 | } |
414 | ||
415 | return NULL; | |
416 | } | |
417 | ||
5cfccc5a | 418 | /* Look up VNI in a per net namespace table */ |
49f810f0 MS |
419 | static struct vxlan_dev *vxlan_find_vni(struct net *net, int ifindex, |
420 | __be32 vni, sa_family_t family, | |
421 | __be16 port, u32 flags) | |
5cfccc5a PS |
422 | { |
423 | struct vxlan_sock *vs; | |
424 | ||
ac5132d1 | 425 | vs = vxlan_find_sock(net, family, port, flags); |
5cfccc5a PS |
426 | if (!vs) |
427 | return NULL; | |
428 | ||
49f810f0 | 429 | return vxlan_vs_find_vni(vs, ifindex, vni); |
5cfccc5a PS |
430 | } |
431 | ||
d342894c | 432 | /* Fill in neighbour message in skbuff. */ |
433 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
434 | const struct vxlan_fdb *fdb, |
435 | u32 portid, u32 seq, int type, unsigned int flags, | |
436 | const struct vxlan_rdst *rdst) | |
d342894c | 437 | { |
438 | unsigned long now = jiffies; | |
439 | struct nda_cacheinfo ci; | |
440 | struct nlmsghdr *nlh; | |
441 | struct ndmsg *ndm; | |
e4f67add | 442 | bool send_ip, send_eth; |
d342894c | 443 | |
444 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
445 | if (nlh == NULL) | |
446 | return -EMSGSIZE; | |
447 | ||
448 | ndm = nlmsg_data(nlh); | |
449 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
450 | |
451 | send_eth = send_ip = true; | |
452 | ||
453 | if (type == RTM_GETNEIGH) { | |
e4c7ed41 | 454 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add | 455 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
8f48ba71 | 456 | ndm->ndm_family = send_ip ? rdst->remote_ip.sa.sa_family : AF_INET; |
e4f67add DS |
457 | } else |
458 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 459 | ndm->ndm_state = fdb->state; |
460 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 461 | ndm->ndm_flags = fdb->flags; |
545469f7 | 462 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 463 | |
193523bf | 464 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 465 | nla_put_s32(skb, NDA_LINK_NETNSID, |
38f507f1 | 466 | peernet2id(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
467 | goto nla_put_failure; |
468 | ||
e4f67add | 469 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 470 | goto nla_put_failure; |
471 | ||
e4c7ed41 | 472 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
473 | goto nla_put_failure; |
474 | ||
0dfbdf41 | 475 | if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && |
6681712d DS |
476 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
477 | goto nla_put_failure; | |
c7995c43 | 478 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
54bfd872 | 479 | nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni))) |
6681712d | 480 | goto nla_put_failure; |
dc5321d7 | 481 | if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && fdb->vni && |
3ad7a4b1 RP |
482 | nla_put_u32(skb, NDA_SRC_VNI, |
483 | be32_to_cpu(fdb->vni))) | |
484 | goto nla_put_failure; | |
6681712d DS |
485 | if (rdst->remote_ifindex && |
486 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 487 | goto nla_put_failure; |
488 | ||
489 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
490 | ci.ndm_confirmed = 0; | |
491 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
492 | ci.ndm_refcnt = 0; | |
493 | ||
494 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
495 | goto nla_put_failure; | |
496 | ||
053c095a JB |
497 | nlmsg_end(skb, nlh); |
498 | return 0; | |
d342894c | 499 | |
500 | nla_put_failure: | |
501 | nlmsg_cancel(skb, nlh); | |
502 | return -EMSGSIZE; | |
503 | } | |
504 | ||
505 | static inline size_t vxlan_nlmsg_size(void) | |
506 | { | |
507 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
508 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 509 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 510 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
511 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
512 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 513 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 514 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
515 | } | |
516 | ||
9e4b93f9 ND |
517 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
518 | struct vxlan_rdst *rd, int type) | |
d342894c | 519 | { |
520 | struct net *net = dev_net(vxlan->dev); | |
521 | struct sk_buff *skb; | |
522 | int err = -ENOBUFS; | |
523 | ||
524 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
525 | if (skb == NULL) | |
526 | goto errout; | |
527 | ||
9e4b93f9 | 528 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 529 | if (err < 0) { |
530 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
531 | WARN_ON(err == -EMSGSIZE); | |
532 | kfree_skb(skb); | |
533 | goto errout; | |
534 | } | |
535 | ||
536 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
537 | return; | |
538 | errout: | |
539 | if (err < 0) | |
540 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
541 | } | |
542 | ||
e4c7ed41 | 543 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
544 | { |
545 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
546 | struct vxlan_fdb f = { |
547 | .state = NUD_STALE, | |
548 | }; | |
549 | struct vxlan_rdst remote = { | |
e4c7ed41 | 550 | .remote_ip = *ipa, /* goes to NDA_DST */ |
54bfd872 | 551 | .remote_vni = cpu_to_be32(VXLAN_N_VID), |
bb3fd687 | 552 | }; |
3e61aa8f | 553 | |
9e4b93f9 | 554 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
555 | } |
556 | ||
557 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
558 | { | |
bb3fd687 SH |
559 | struct vxlan_fdb f = { |
560 | .state = NUD_STALE, | |
561 | }; | |
9e4b93f9 | 562 | struct vxlan_rdst remote = { }; |
e4f67add | 563 | |
e4f67add DS |
564 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
565 | ||
9e4b93f9 | 566 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
567 | } |
568 | ||
d342894c | 569 | /* Hash Ethernet address */ |
570 | static u32 eth_hash(const unsigned char *addr) | |
571 | { | |
572 | u64 value = get_unaligned((u64 *)addr); | |
573 | ||
574 | /* only want 6 bytes */ | |
575 | #ifdef __BIG_ENDIAN | |
d342894c | 576 | value >>= 16; |
321fb991 | 577 | #else |
578 | value <<= 16; | |
d342894c | 579 | #endif |
580 | return hash_64(value, FDB_HASH_BITS); | |
581 | } | |
582 | ||
3ad7a4b1 RP |
583 | static u32 eth_vni_hash(const unsigned char *addr, __be32 vni) |
584 | { | |
585 | /* use 1 byte of OUI and 3 bytes of NIC */ | |
586 | u32 key = get_unaligned((u32 *)(addr + 2)); | |
587 | ||
588 | return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1); | |
589 | } | |
590 | ||
d342894c | 591 | /* Hash chain to use given mac address */ |
592 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
3ad7a4b1 | 593 | const u8 *mac, __be32 vni) |
d342894c | 594 | { |
dc5321d7 | 595 | if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) |
3ad7a4b1 RP |
596 | return &vxlan->fdb_head[eth_vni_hash(mac, vni)]; |
597 | else | |
598 | return &vxlan->fdb_head[eth_hash(mac)]; | |
d342894c | 599 | } |
600 | ||
601 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 602 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 603 | const u8 *mac, __be32 vni) |
d342894c | 604 | { |
3ad7a4b1 | 605 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni); |
d342894c | 606 | struct vxlan_fdb *f; |
d342894c | 607 | |
b67bfe0d | 608 | hlist_for_each_entry_rcu(f, head, hlist) { |
3ad7a4b1 | 609 | if (ether_addr_equal(mac, f->eth_addr)) { |
dc5321d7 | 610 | if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) { |
3ad7a4b1 RP |
611 | if (vni == f->vni) |
612 | return f; | |
613 | } else { | |
614 | return f; | |
615 | } | |
616 | } | |
d342894c | 617 | } |
618 | ||
619 | return NULL; | |
620 | } | |
621 | ||
014be2c8 | 622 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 623 | const u8 *mac, __be32 vni) |
014be2c8 SS |
624 | { |
625 | struct vxlan_fdb *f; | |
626 | ||
3ad7a4b1 | 627 | f = __vxlan_find_mac(vxlan, mac, vni); |
014be2c8 SS |
628 | if (f) |
629 | f->used = jiffies; | |
630 | ||
631 | return f; | |
632 | } | |
633 | ||
a5e7c10a MR |
634 | /* caller should hold vxlan->hash_lock */ |
635 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 636 | union vxlan_addr *ip, __be16 port, |
54bfd872 | 637 | __be32 vni, __u32 ifindex) |
6681712d | 638 | { |
3e61aa8f | 639 | struct vxlan_rdst *rd; |
6681712d | 640 | |
3e61aa8f | 641 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 642 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
643 | rd->remote_port == port && |
644 | rd->remote_vni == vni && | |
645 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 646 | return rd; |
6681712d | 647 | } |
3e61aa8f | 648 | |
a5e7c10a MR |
649 | return NULL; |
650 | } | |
651 | ||
906dc186 TR |
652 | /* Replace destination of unicast mac */ |
653 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
54bfd872 JB |
654 | union vxlan_addr *ip, __be16 port, __be32 vni, |
655 | __u32 ifindex) | |
906dc186 TR |
656 | { |
657 | struct vxlan_rdst *rd; | |
658 | ||
659 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
660 | if (rd) | |
661 | return 0; | |
662 | ||
663 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
664 | if (!rd) | |
665 | return 0; | |
0c1d70af PA |
666 | |
667 | dst_cache_reset(&rd->dst_cache); | |
e4c7ed41 | 668 | rd->remote_ip = *ip; |
906dc186 TR |
669 | rd->remote_port = port; |
670 | rd->remote_vni = vni; | |
671 | rd->remote_ifindex = ifindex; | |
672 | return 1; | |
673 | } | |
674 | ||
a5e7c10a MR |
675 | /* Add/update destinations for multicast */ |
676 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
54bfd872 | 677 | union vxlan_addr *ip, __be16 port, __be32 vni, |
9e4b93f9 | 678 | __u32 ifindex, struct vxlan_rdst **rdp) |
a5e7c10a MR |
679 | { |
680 | struct vxlan_rdst *rd; | |
681 | ||
682 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
683 | if (rd) | |
684 | return 0; | |
685 | ||
6681712d DS |
686 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
687 | if (rd == NULL) | |
688 | return -ENOBUFS; | |
0c1d70af PA |
689 | |
690 | if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) { | |
691 | kfree(rd); | |
692 | return -ENOBUFS; | |
693 | } | |
694 | ||
e4c7ed41 | 695 | rd->remote_ip = *ip; |
6681712d DS |
696 | rd->remote_port = port; |
697 | rd->remote_vni = vni; | |
698 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
699 | |
700 | list_add_tail_rcu(&rd->list, &f->remotes); | |
701 | ||
9e4b93f9 | 702 | *rdp = rd; |
6681712d DS |
703 | return 1; |
704 | } | |
705 | ||
dfd8645e TH |
706 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
707 | unsigned int off, | |
708 | struct vxlanhdr *vh, size_t hdrlen, | |
54bfd872 JB |
709 | __be32 vni_field, |
710 | struct gro_remcsum *grc, | |
0ace2ca8 | 711 | bool nopartial) |
dfd8645e | 712 | { |
b7fe10e5 | 713 | size_t start, offset; |
dfd8645e TH |
714 | |
715 | if (skb->remcsum_offload) | |
b7fe10e5 | 716 | return vh; |
dfd8645e TH |
717 | |
718 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
719 | return NULL; | |
720 | ||
54bfd872 JB |
721 | start = vxlan_rco_start(vni_field); |
722 | offset = start + vxlan_rco_offset(vni_field); | |
dfd8645e | 723 | |
b7fe10e5 TH |
724 | vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
725 | start, offset, grc, nopartial); | |
dfd8645e TH |
726 | |
727 | skb->remcsum_offload = 1; | |
728 | ||
729 | return vh; | |
730 | } | |
731 | ||
5602c48c TH |
732 | static struct sk_buff **vxlan_gro_receive(struct sock *sk, |
733 | struct sk_buff **head, | |
734 | struct sk_buff *skb) | |
dc01e7d3 OG |
735 | { |
736 | struct sk_buff *p, **pp = NULL; | |
737 | struct vxlanhdr *vh, *vh2; | |
9b174d88 | 738 | unsigned int hlen, off_vx; |
dc01e7d3 | 739 | int flush = 1; |
5602c48c | 740 | struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk); |
54bfd872 | 741 | __be32 flags; |
26c4f7da TH |
742 | struct gro_remcsum grc; |
743 | ||
744 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
745 | |
746 | off_vx = skb_gro_offset(skb); | |
747 | hlen = off_vx + sizeof(*vh); | |
748 | vh = skb_gro_header_fast(skb, off_vx); | |
749 | if (skb_gro_header_hard(skb, hlen)) { | |
750 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
751 | if (unlikely(!vh)) | |
752 | goto out; | |
753 | } | |
dc01e7d3 | 754 | |
dfd8645e TH |
755 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
756 | ||
54bfd872 | 757 | flags = vh->vx_flags; |
dfd8645e TH |
758 | |
759 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
760 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
54bfd872 | 761 | vh->vx_vni, &grc, |
0ace2ca8 TH |
762 | !!(vs->flags & |
763 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
764 | |
765 | if (!vh) | |
766 | goto out; | |
767 | } | |
768 | ||
b7fe10e5 TH |
769 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
770 | ||
dc01e7d3 OG |
771 | for (p = *head; p; p = p->next) { |
772 | if (!NAPI_GRO_CB(p)->same_flow) | |
773 | continue; | |
774 | ||
775 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
776 | if (vh->vx_flags != vh2->vx_flags || |
777 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
778 | NAPI_GRO_CB(p)->same_flow = 0; |
779 | continue; | |
780 | } | |
dc01e7d3 OG |
781 | } |
782 | ||
fcd91dd4 | 783 | pp = call_gro_receive(eth_gro_receive, head, skb); |
c194cf93 | 784 | flush = 0; |
dc01e7d3 | 785 | |
dc01e7d3 | 786 | out: |
26c4f7da | 787 | skb_gro_remcsum_cleanup(skb, &grc); |
be73b304 | 788 | skb->remcsum_offload = 0; |
dc01e7d3 OG |
789 | NAPI_GRO_CB(skb)->flush |= flush; |
790 | ||
791 | return pp; | |
792 | } | |
793 | ||
5602c48c | 794 | static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff) |
dc01e7d3 | 795 | { |
229740c6 JR |
796 | /* Sets 'skb->inner_mac_header' since we are always called with |
797 | * 'skb->encapsulation' set. | |
798 | */ | |
9b174d88 | 799 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
800 | } |
801 | ||
d342894c | 802 | /* Add new entry to forwarding table -- assumes lock held */ |
803 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 804 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 805 | __u16 state, __u16 flags, |
3ad7a4b1 RP |
806 | __be16 port, __be32 src_vni, __be32 vni, |
807 | __u32 ifindex, __u8 ndm_flags) | |
d342894c | 808 | { |
9e4b93f9 | 809 | struct vxlan_rdst *rd = NULL; |
d342894c | 810 | struct vxlan_fdb *f; |
811 | int notify = 0; | |
17b46365 | 812 | int rc; |
d342894c | 813 | |
3ad7a4b1 | 814 | f = __vxlan_find_mac(vxlan, mac, src_vni); |
d342894c | 815 | if (f) { |
816 | if (flags & NLM_F_EXCL) { | |
817 | netdev_dbg(vxlan->dev, | |
818 | "lost race to create %pM\n", mac); | |
819 | return -EEXIST; | |
820 | } | |
821 | if (f->state != state) { | |
822 | f->state = state; | |
823 | f->updated = jiffies; | |
824 | notify = 1; | |
825 | } | |
ae884082 DS |
826 | if (f->flags != ndm_flags) { |
827 | f->flags = ndm_flags; | |
828 | f->updated = jiffies; | |
829 | notify = 1; | |
830 | } | |
906dc186 TR |
831 | if ((flags & NLM_F_REPLACE)) { |
832 | /* Only change unicasts */ | |
833 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
834 | is_zero_ether_addr(f->eth_addr))) { | |
60840429 | 835 | notify |= vxlan_fdb_replace(f, ip, port, vni, |
906dc186 | 836 | ifindex); |
906dc186 TR |
837 | } else |
838 | return -EOPNOTSUPP; | |
839 | } | |
6681712d | 840 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
841 | (is_multicast_ether_addr(f->eth_addr) || |
842 | is_zero_ether_addr(f->eth_addr))) { | |
17b46365 | 843 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
6681712d DS |
844 | |
845 | if (rc < 0) | |
846 | return rc; | |
847 | notify |= rc; | |
848 | } | |
d342894c | 849 | } else { |
850 | if (!(flags & NLM_F_CREATE)) | |
851 | return -ENOENT; | |
852 | ||
0dfbdf41 TG |
853 | if (vxlan->cfg.addrmax && |
854 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
d342894c | 855 | return -ENOSPC; |
856 | ||
906dc186 TR |
857 | /* Disallow replace to add a multicast entry */ |
858 | if ((flags & NLM_F_REPLACE) && | |
859 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
860 | return -EOPNOTSUPP; | |
861 | ||
e4c7ed41 | 862 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 863 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
864 | if (!f) | |
865 | return -ENOMEM; | |
866 | ||
867 | notify = 1; | |
d342894c | 868 | f->state = state; |
ae884082 | 869 | f->flags = ndm_flags; |
d342894c | 870 | f->updated = f->used = jiffies; |
3ad7a4b1 | 871 | f->vni = src_vni; |
3e61aa8f | 872 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 873 | memcpy(f->eth_addr, mac, ETH_ALEN); |
874 | ||
17b46365 HY |
875 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
876 | if (rc < 0) { | |
877 | kfree(f); | |
878 | return rc; | |
879 | } | |
3e61aa8f | 880 | |
d342894c | 881 | ++vxlan->addrcnt; |
882 | hlist_add_head_rcu(&f->hlist, | |
3ad7a4b1 | 883 | vxlan_fdb_head(vxlan, mac, src_vni)); |
d342894c | 884 | } |
885 | ||
9e4b93f9 ND |
886 | if (notify) { |
887 | if (rd == NULL) | |
888 | rd = first_remote_rtnl(f); | |
889 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
890 | } | |
d342894c | 891 | |
892 | return 0; | |
893 | } | |
894 | ||
6706c82e | 895 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
896 | { |
897 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 898 | struct vxlan_rdst *rd, *nd; |
6681712d | 899 | |
0c1d70af PA |
900 | list_for_each_entry_safe(rd, nd, &f->remotes, list) { |
901 | dst_cache_destroy(&rd->dst_cache); | |
6681712d | 902 | kfree(rd); |
0c1d70af | 903 | } |
6681712d DS |
904 | kfree(f); |
905 | } | |
906 | ||
d342894c | 907 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
908 | { | |
909 | netdev_dbg(vxlan->dev, | |
910 | "delete %pM\n", f->eth_addr); | |
911 | ||
912 | --vxlan->addrcnt; | |
9e4b93f9 | 913 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 914 | |
915 | hlist_del_rcu(&f->hlist); | |
6681712d | 916 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 917 | } |
918 | ||
35cf2845 LR |
919 | static void vxlan_dst_free(struct rcu_head *head) |
920 | { | |
921 | struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); | |
922 | ||
923 | dst_cache_destroy(&rd->dst_cache); | |
924 | kfree(rd); | |
925 | } | |
926 | ||
927 | static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f, | |
928 | struct vxlan_rdst *rd) | |
929 | { | |
930 | list_del_rcu(&rd->list); | |
931 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); | |
932 | call_rcu(&rd->rcu, vxlan_dst_free); | |
933 | } | |
934 | ||
f0b074be | 935 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
3ad7a4b1 RP |
936 | union vxlan_addr *ip, __be16 *port, __be32 *src_vni, |
937 | __be32 *vni, u32 *ifindex) | |
d342894c | 938 | { |
6681712d | 939 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 940 | int err; |
d342894c | 941 | |
f0b074be | 942 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
943 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
944 | if (err) | |
945 | return err; | |
f0b074be | 946 | } else { |
e4c7ed41 CW |
947 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
948 | if (remote->sa.sa_family == AF_INET) { | |
949 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
950 | ip->sa.sa_family = AF_INET; | |
951 | #if IS_ENABLED(CONFIG_IPV6) | |
952 | } else { | |
953 | ip->sin6.sin6_addr = in6addr_any; | |
954 | ip->sa.sa_family = AF_INET6; | |
955 | #endif | |
956 | } | |
f0b074be | 957 | } |
d342894c | 958 | |
6681712d | 959 | if (tb[NDA_PORT]) { |
73cf3317 | 960 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 961 | return -EINVAL; |
f0b074be MR |
962 | *port = nla_get_be16(tb[NDA_PORT]); |
963 | } else { | |
0dfbdf41 | 964 | *port = vxlan->cfg.dst_port; |
f0b074be | 965 | } |
6681712d DS |
966 | |
967 | if (tb[NDA_VNI]) { | |
968 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
969 | return -EINVAL; | |
54bfd872 | 970 | *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); |
f0b074be MR |
971 | } else { |
972 | *vni = vxlan->default_dst.remote_vni; | |
973 | } | |
6681712d | 974 | |
3ad7a4b1 RP |
975 | if (tb[NDA_SRC_VNI]) { |
976 | if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32)) | |
977 | return -EINVAL; | |
978 | *src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI])); | |
979 | } else { | |
980 | *src_vni = vxlan->default_dst.remote_vni; | |
981 | } | |
982 | ||
6681712d | 983 | if (tb[NDA_IFINDEX]) { |
5abb0029 | 984 | struct net_device *tdev; |
6681712d DS |
985 | |
986 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
987 | return -EINVAL; | |
f0b074be | 988 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 989 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 990 | if (!tdev) |
6681712d | 991 | return -EADDRNOTAVAIL; |
f0b074be MR |
992 | } else { |
993 | *ifindex = 0; | |
994 | } | |
995 | ||
996 | return 0; | |
997 | } | |
998 | ||
999 | /* Add static entry (via netlink) */ | |
1000 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
1001 | struct net_device *dev, | |
f6f6424b | 1002 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
1003 | { |
1004 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1005 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 1006 | union vxlan_addr ip; |
f0b074be | 1007 | __be16 port; |
3ad7a4b1 | 1008 | __be32 src_vni, vni; |
54bfd872 | 1009 | u32 ifindex; |
f0b074be MR |
1010 | int err; |
1011 | ||
1012 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
1013 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
1014 | ndm->ndm_state); | |
1015 | return -EINVAL; | |
1016 | } | |
1017 | ||
1018 | if (tb[NDA_DST] == NULL) | |
1019 | return -EINVAL; | |
1020 | ||
3ad7a4b1 | 1021 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex); |
f0b074be MR |
1022 | if (err) |
1023 | return err; | |
6681712d | 1024 | |
5933a7bb MR |
1025 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
1026 | return -EAFNOSUPPORT; | |
1027 | ||
d342894c | 1028 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 1029 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
3ad7a4b1 | 1030 | port, src_vni, vni, ifindex, ndm->ndm_flags); |
d342894c | 1031 | spin_unlock_bh(&vxlan->hash_lock); |
1032 | ||
1033 | return err; | |
1034 | } | |
1035 | ||
3ad7a4b1 RP |
1036 | static int __vxlan_fdb_delete(struct vxlan_dev *vxlan, |
1037 | const unsigned char *addr, union vxlan_addr ip, | |
1038 | __be16 port, __be32 src_vni, u32 vni, u32 ifindex, | |
1039 | u16 vid) | |
d342894c | 1040 | { |
d342894c | 1041 | struct vxlan_fdb *f; |
bc7892ba | 1042 | struct vxlan_rdst *rd = NULL; |
3ad7a4b1 | 1043 | int err = -ENOENT; |
bc7892ba | 1044 | |
3ad7a4b1 | 1045 | f = vxlan_find_mac(vxlan, addr, src_vni); |
bc7892ba | 1046 | if (!f) |
3ad7a4b1 | 1047 | return err; |
bc7892ba | 1048 | |
e4c7ed41 CW |
1049 | if (!vxlan_addr_any(&ip)) { |
1050 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
1051 | if (!rd) |
1052 | goto out; | |
1053 | } | |
1054 | ||
bc7892ba MR |
1055 | /* remove a destination if it's not the only one on the list, |
1056 | * otherwise destroy the fdb entry | |
1057 | */ | |
1058 | if (rd && !list_is_singular(&f->remotes)) { | |
35cf2845 | 1059 | vxlan_fdb_dst_destroy(vxlan, f, rd); |
bc7892ba | 1060 | goto out; |
d342894c | 1061 | } |
bc7892ba MR |
1062 | |
1063 | vxlan_fdb_destroy(vxlan, f); | |
1064 | ||
1065 | out: | |
3ad7a4b1 RP |
1066 | return 0; |
1067 | } | |
1068 | ||
1069 | /* Delete entry (via netlink) */ | |
1070 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], | |
1071 | struct net_device *dev, | |
1072 | const unsigned char *addr, u16 vid) | |
1073 | { | |
1074 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1075 | union vxlan_addr ip; | |
1076 | __be32 src_vni, vni; | |
1077 | __be16 port; | |
1078 | u32 ifindex; | |
1079 | int err; | |
1080 | ||
1081 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex); | |
1082 | if (err) | |
1083 | return err; | |
1084 | ||
1085 | spin_lock_bh(&vxlan->hash_lock); | |
1086 | err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex, | |
1087 | vid); | |
d342894c | 1088 | spin_unlock_bh(&vxlan->hash_lock); |
1089 | ||
1090 | return err; | |
1091 | } | |
1092 | ||
1093 | /* Dump forwarding table */ | |
1094 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 | 1095 | struct net_device *dev, |
d297653d | 1096 | struct net_device *filter_dev, int *idx) |
d342894c | 1097 | { |
1098 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1099 | unsigned int h; | |
d297653d | 1100 | int err = 0; |
d342894c | 1101 | |
1102 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1103 | struct vxlan_fdb *f; | |
d342894c | 1104 | |
b67bfe0d | 1105 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 1106 | struct vxlan_rdst *rd; |
6681712d | 1107 | |
3e61aa8f | 1108 | list_for_each_entry_rcu(rd, &f->remotes, list) { |
d297653d | 1109 | if (*idx < cb->args[2]) |
07a51cd3 AW |
1110 | goto skip; |
1111 | ||
6681712d DS |
1112 | err = vxlan_fdb_info(skb, vxlan, f, |
1113 | NETLINK_CB(cb->skb).portid, | |
1114 | cb->nlh->nlmsg_seq, | |
1115 | RTM_NEWNEIGH, | |
1116 | NLM_F_MULTI, rd); | |
d297653d | 1117 | if (err < 0) |
3e61aa8f | 1118 | goto out; |
3e61aa8f | 1119 | skip: |
d297653d | 1120 | *idx += 1; |
07a51cd3 | 1121 | } |
d342894c | 1122 | } |
1123 | } | |
3e61aa8f | 1124 | out: |
d297653d | 1125 | return err; |
d342894c | 1126 | } |
1127 | ||
1128 | /* Watch incoming packets to learn mapping between Ethernet address | |
1129 | * and Tunnel endpoint. | |
c4b49512 | 1130 | * Return true if packet is bogus and should be dropped. |
d342894c | 1131 | */ |
26a41ae6 | 1132 | static bool vxlan_snoop(struct net_device *dev, |
3ad7a4b1 | 1133 | union vxlan_addr *src_ip, const u8 *src_mac, |
87613de9 | 1134 | u32 src_ifindex, __be32 vni) |
d342894c | 1135 | { |
1136 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1137 | struct vxlan_fdb *f; | |
87613de9 MS |
1138 | u32 ifindex = 0; |
1139 | ||
1140 | #if IS_ENABLED(CONFIG_IPV6) | |
1141 | if (src_ip->sa.sa_family == AF_INET6 && | |
1142 | (ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL)) | |
1143 | ifindex = src_ifindex; | |
1144 | #endif | |
d342894c | 1145 | |
3ad7a4b1 | 1146 | f = vxlan_find_mac(vxlan, src_mac, vni); |
d342894c | 1147 | if (likely(f)) { |
5ca5461c | 1148 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 1149 | |
87613de9 MS |
1150 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) && |
1151 | rdst->remote_ifindex == ifindex)) | |
26a41ae6 | 1152 | return false; |
1153 | ||
1154 | /* Don't migrate static entries, drop packets */ | |
e0090a9e | 1155 | if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
26a41ae6 | 1156 | return true; |
d342894c | 1157 | |
1158 | if (net_ratelimit()) | |
1159 | netdev_info(dev, | |
e4c7ed41 | 1160 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 1161 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 1162 | |
e4c7ed41 | 1163 | rdst->remote_ip = *src_ip; |
d342894c | 1164 | f->updated = jiffies; |
9e4b93f9 | 1165 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 1166 | } else { |
1167 | /* learned new entry */ | |
1168 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 1169 | |
1170 | /* close off race between vxlan_flush and incoming packets */ | |
1171 | if (netif_running(dev)) | |
1172 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
1173 | NUD_REACHABLE, | |
1174 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 1175 | vxlan->cfg.dst_port, |
3ad7a4b1 | 1176 | vni, |
3bf74b1a | 1177 | vxlan->default_dst.remote_vni, |
87613de9 | 1178 | ifindex, NTF_SELF); |
d342894c | 1179 | spin_unlock(&vxlan->hash_lock); |
1180 | } | |
26a41ae6 | 1181 | |
1182 | return false; | |
d342894c | 1183 | } |
1184 | ||
d342894c | 1185 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1186 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1187 | { |
553675fb | 1188 | struct vxlan_dev *vxlan; |
c6fcc4fc | 1189 | struct vxlan_sock *sock4; |
4053ab1b AB |
1190 | #if IS_ENABLED(CONFIG_IPV6) |
1191 | struct vxlan_sock *sock6; | |
1192 | #endif | |
b1be00a6 | 1193 | unsigned short family = dev->default_dst.remote_ip.sa.sa_family; |
d342894c | 1194 | |
c6fcc4fc | 1195 | sock4 = rtnl_dereference(dev->vn4_sock); |
1196 | ||
95ab0991 G |
1197 | /* The vxlan_sock is only used by dev, leaving group has |
1198 | * no effect on other vxlan devices. | |
1199 | */ | |
66af846f | 1200 | if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1) |
95ab0991 | 1201 | return false; |
b1be00a6 | 1202 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1203 | sock6 = rtnl_dereference(dev->vn6_sock); |
66af846f | 1204 | if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1) |
b1be00a6 JB |
1205 | return false; |
1206 | #endif | |
95ab0991 | 1207 | |
553675fb | 1208 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1209 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1210 | continue; |
d342894c | 1211 | |
c6fcc4fc | 1212 | if (family == AF_INET && |
1213 | rtnl_dereference(vxlan->vn4_sock) != sock4) | |
95ab0991 | 1214 | continue; |
b1be00a6 | 1215 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1216 | if (family == AF_INET6 && |
1217 | rtnl_dereference(vxlan->vn6_sock) != sock6) | |
b1be00a6 JB |
1218 | continue; |
1219 | #endif | |
95ab0991 G |
1220 | |
1221 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1222 | &dev->default_dst.remote_ip)) | |
1223 | continue; | |
1224 | ||
1225 | if (vxlan->default_dst.remote_ifindex != | |
1226 | dev->default_dst.remote_ifindex) | |
1227 | continue; | |
1228 | ||
1229 | return true; | |
553675fb | 1230 | } |
d342894c | 1231 | |
1232 | return false; | |
1233 | } | |
1234 | ||
544a773a | 1235 | static bool __vxlan_sock_release_prep(struct vxlan_sock *vs) |
7c47cedf | 1236 | { |
b1be00a6 | 1237 | struct vxlan_net *vn; |
012a5729 | 1238 | |
b1be00a6 | 1239 | if (!vs) |
544a773a | 1240 | return false; |
66af846f | 1241 | if (!refcount_dec_and_test(&vs->refcnt)) |
544a773a | 1242 | return false; |
d342894c | 1243 | |
b1be00a6 | 1244 | vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
1c51a915 | 1245 | spin_lock(&vn->sock_lock); |
7c47cedf | 1246 | hlist_del_rcu(&vs->hlist); |
e7b3db5e | 1247 | udp_tunnel_notify_del_rx_port(vs->sock, |
b9adcd69 AD |
1248 | (vs->flags & VXLAN_F_GPE) ? |
1249 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 1250 | UDP_TUNNEL_TYPE_VXLAN); |
1c51a915 SH |
1251 | spin_unlock(&vn->sock_lock); |
1252 | ||
544a773a | 1253 | return true; |
d342894c | 1254 | } |
1255 | ||
b1be00a6 JB |
1256 | static void vxlan_sock_release(struct vxlan_dev *vxlan) |
1257 | { | |
c6fcc4fc | 1258 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
b1be00a6 | 1259 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1260 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1261 | ||
57d88182 | 1262 | RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
544a773a HFS |
1263 | #endif |
1264 | ||
57d88182 | 1265 | RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
544a773a HFS |
1266 | synchronize_net(); |
1267 | ||
a53cb29b MB |
1268 | vxlan_vs_del_dev(vxlan); |
1269 | ||
c6fcc4fc | 1270 | if (__vxlan_sock_release_prep(sock4)) { |
1271 | udp_tunnel_sock_release(sock4->sock); | |
1272 | kfree(sock4); | |
544a773a HFS |
1273 | } |
1274 | ||
1275 | #if IS_ENABLED(CONFIG_IPV6) | |
c6fcc4fc | 1276 | if (__vxlan_sock_release_prep(sock6)) { |
1277 | udp_tunnel_sock_release(sock6->sock); | |
1278 | kfree(sock6); | |
544a773a | 1279 | } |
b1be00a6 JB |
1280 | #endif |
1281 | } | |
1282 | ||
56ef9c90 | 1283 | /* Update multicast group membership when first VNI on |
c4b49512 | 1284 | * multicast address is brought up |
7c47cedf | 1285 | */ |
56ef9c90 | 1286 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1287 | { |
b1be00a6 | 1288 | struct sock *sk; |
e4c7ed41 CW |
1289 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1290 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1291 | int ret = -EINVAL; |
d342894c | 1292 | |
e4c7ed41 | 1293 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1294 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1295 | struct ip_mreqn mreq = { |
1296 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1297 | .imr_ifindex = ifindex, | |
1298 | }; | |
1299 | ||
c6fcc4fc | 1300 | sk = sock4->sock->sk; |
b1be00a6 | 1301 | lock_sock(sk); |
56ef9c90 | 1302 | ret = ip_mc_join_group(sk, &mreq); |
b1be00a6 | 1303 | release_sock(sk); |
e4c7ed41 CW |
1304 | #if IS_ENABLED(CONFIG_IPV6) |
1305 | } else { | |
c6fcc4fc | 1306 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1307 | ||
1308 | sk = sock6->sock->sk; | |
b1be00a6 | 1309 | lock_sock(sk); |
56ef9c90 MRL |
1310 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1311 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1312 | release_sock(sk); |
e4c7ed41 CW |
1313 | #endif |
1314 | } | |
3fc2de2f | 1315 | |
56ef9c90 | 1316 | return ret; |
3fc2de2f | 1317 | } |
1318 | ||
1319 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1320 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1321 | { |
b1be00a6 | 1322 | struct sock *sk; |
e4c7ed41 CW |
1323 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1324 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1325 | int ret = -EINVAL; |
3fc2de2f | 1326 | |
e4c7ed41 | 1327 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1328 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1329 | struct ip_mreqn mreq = { |
1330 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1331 | .imr_ifindex = ifindex, | |
1332 | }; | |
1333 | ||
c6fcc4fc | 1334 | sk = sock4->sock->sk; |
b1be00a6 | 1335 | lock_sock(sk); |
56ef9c90 | 1336 | ret = ip_mc_leave_group(sk, &mreq); |
b1be00a6 | 1337 | release_sock(sk); |
e4c7ed41 CW |
1338 | #if IS_ENABLED(CONFIG_IPV6) |
1339 | } else { | |
c6fcc4fc | 1340 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1341 | ||
1342 | sk = sock6->sock->sk; | |
b1be00a6 | 1343 | lock_sock(sk); |
56ef9c90 MRL |
1344 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1345 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1346 | release_sock(sk); |
e4c7ed41 CW |
1347 | #endif |
1348 | } | |
d342894c | 1349 | |
56ef9c90 | 1350 | return ret; |
d342894c | 1351 | } |
1352 | ||
f14ecebb JB |
1353 | static bool vxlan_remcsum(struct vxlanhdr *unparsed, |
1354 | struct sk_buff *skb, u32 vxflags) | |
dfd8645e | 1355 | { |
7d34fa75 | 1356 | size_t start, offset; |
dfd8645e | 1357 | |
f14ecebb JB |
1358 | if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload) |
1359 | goto out; | |
b7fe10e5 | 1360 | |
f14ecebb JB |
1361 | start = vxlan_rco_start(unparsed->vx_vni); |
1362 | offset = start + vxlan_rco_offset(unparsed->vx_vni); | |
dfd8645e | 1363 | |
7d34fa75 | 1364 | if (!pskb_may_pull(skb, offset + sizeof(u16))) |
be5cfeab | 1365 | return false; |
dfd8645e | 1366 | |
be5cfeab JB |
1367 | skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset, |
1368 | !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
f14ecebb JB |
1369 | out: |
1370 | unparsed->vx_flags &= ~VXLAN_HF_RCO; | |
1371 | unparsed->vx_vni &= VXLAN_VNI_MASK; | |
be5cfeab | 1372 | return true; |
dfd8645e TH |
1373 | } |
1374 | ||
f14ecebb | 1375 | static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed, |
64f87d36 | 1376 | struct sk_buff *skb, u32 vxflags, |
10a5af23 | 1377 | struct vxlan_metadata *md) |
3288af08 | 1378 | { |
f14ecebb | 1379 | struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed; |
10a5af23 | 1380 | struct metadata_dst *tun_dst; |
f14ecebb JB |
1381 | |
1382 | if (!(unparsed->vx_flags & VXLAN_HF_GBP)) | |
1383 | goto out; | |
3288af08 | 1384 | |
3288af08 JB |
1385 | md->gbp = ntohs(gbp->policy_id); |
1386 | ||
10a5af23 | 1387 | tun_dst = (struct metadata_dst *)skb_dst(skb); |
810813c4 | 1388 | if (tun_dst) { |
3288af08 | 1389 | tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
810813c4 DM |
1390 | tun_dst->u.tun_info.options_len = sizeof(*md); |
1391 | } | |
3288af08 JB |
1392 | if (gbp->dont_learn) |
1393 | md->gbp |= VXLAN_GBP_DONT_LEARN; | |
1394 | ||
1395 | if (gbp->policy_applied) | |
1396 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; | |
f14ecebb | 1397 | |
64f87d36 JB |
1398 | /* In flow-based mode, GBP is carried in dst_metadata */ |
1399 | if (!(vxflags & VXLAN_F_COLLECT_METADATA)) | |
1400 | skb->mark = md->gbp; | |
f14ecebb JB |
1401 | out: |
1402 | unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS; | |
3288af08 JB |
1403 | } |
1404 | ||
e1e5314d | 1405 | static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed, |
61618eea | 1406 | __be16 *protocol, |
e1e5314d JB |
1407 | struct sk_buff *skb, u32 vxflags) |
1408 | { | |
1409 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed; | |
1410 | ||
1411 | /* Need to have Next Protocol set for interfaces in GPE mode. */ | |
1412 | if (!gpe->np_applied) | |
1413 | return false; | |
1414 | /* "The initial version is 0. If a receiver does not support the | |
1415 | * version indicated it MUST drop the packet. | |
1416 | */ | |
1417 | if (gpe->version != 0) | |
1418 | return false; | |
1419 | /* "When the O bit is set to 1, the packet is an OAM packet and OAM | |
1420 | * processing MUST occur." However, we don't implement OAM | |
1421 | * processing, thus drop the packet. | |
1422 | */ | |
1423 | if (gpe->oam_flag) | |
1424 | return false; | |
1425 | ||
1426 | switch (gpe->next_protocol) { | |
1427 | case VXLAN_GPE_NP_IPV4: | |
1428 | *protocol = htons(ETH_P_IP); | |
1429 | break; | |
1430 | case VXLAN_GPE_NP_IPV6: | |
1431 | *protocol = htons(ETH_P_IPV6); | |
1432 | break; | |
1433 | case VXLAN_GPE_NP_ETHERNET: | |
1434 | *protocol = htons(ETH_P_TEB); | |
1435 | break; | |
1436 | default: | |
1437 | return false; | |
1438 | } | |
1439 | ||
1440 | unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS; | |
1441 | return true; | |
1442 | } | |
1443 | ||
1ab016e2 JB |
1444 | static bool vxlan_set_mac(struct vxlan_dev *vxlan, |
1445 | struct vxlan_sock *vs, | |
3ad7a4b1 | 1446 | struct sk_buff *skb, __be32 vni) |
614732ea | 1447 | { |
614732ea | 1448 | union vxlan_addr saddr; |
87613de9 | 1449 | u32 ifindex = skb->dev->ifindex; |
614732ea | 1450 | |
614732ea | 1451 | skb_reset_mac_header(skb); |
614732ea TG |
1452 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
1453 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1454 | ||
1455 | /* Ignore packet loops (and multicast echo) */ | |
1456 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1ab016e2 | 1457 | return false; |
614732ea | 1458 | |
760c6805 | 1459 | /* Get address from the outer IP header */ |
ce212d0f | 1460 | if (vxlan_get_sk_family(vs) == AF_INET) { |
1ab016e2 | 1461 | saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; |
614732ea TG |
1462 | saddr.sa.sa_family = AF_INET; |
1463 | #if IS_ENABLED(CONFIG_IPV6) | |
1464 | } else { | |
1ab016e2 | 1465 | saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr; |
614732ea TG |
1466 | saddr.sa.sa_family = AF_INET6; |
1467 | #endif | |
1468 | } | |
1469 | ||
dc5321d7 | 1470 | if ((vxlan->cfg.flags & VXLAN_F_LEARN) && |
87613de9 | 1471 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni)) |
1ab016e2 JB |
1472 | return false; |
1473 | ||
1474 | return true; | |
1475 | } | |
1476 | ||
760c6805 JB |
1477 | static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph, |
1478 | struct sk_buff *skb) | |
1479 | { | |
1480 | int err = 0; | |
1481 | ||
1482 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1483 | err = IP_ECN_decapsulate(oiph, skb); | |
1484 | #if IS_ENABLED(CONFIG_IPV6) | |
1485 | else | |
1486 | err = IP6_ECN_decapsulate(oiph, skb); | |
1487 | #endif | |
1488 | ||
1489 | if (unlikely(err) && log_ecn_error) { | |
1490 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1491 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1492 | &((struct iphdr *)oiph)->saddr, | |
1493 | ((struct iphdr *)oiph)->tos); | |
1494 | else | |
1495 | net_info_ratelimited("non-ECT from %pI6\n", | |
1496 | &((struct ipv6hdr *)oiph)->saddr); | |
1497 | } | |
1498 | return err <= 1; | |
1499 | } | |
1500 | ||
d342894c | 1501 | /* Callback from net/ipv4/udp.c to receive packets */ |
f2d1968e | 1502 | static int vxlan_rcv(struct sock *sk, struct sk_buff *skb) |
d342894c | 1503 | { |
f2d1968e | 1504 | struct pcpu_sw_netstats *stats; |
c9e78efb | 1505 | struct vxlan_dev *vxlan; |
5cfccc5a | 1506 | struct vxlan_sock *vs; |
f14ecebb | 1507 | struct vxlanhdr unparsed; |
ee122c79 TG |
1508 | struct vxlan_metadata _md; |
1509 | struct vxlan_metadata *md = &_md; | |
61618eea | 1510 | __be16 protocol = htons(ETH_P_TEB); |
e1e5314d | 1511 | bool raw_proto = false; |
f2d1968e | 1512 | void *oiph; |
3ad7a4b1 | 1513 | __be32 vni = 0; |
d342894c | 1514 | |
e1e5314d | 1515 | /* Need UDP and VXLAN header to be present */ |
7ce04758 | 1516 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
e5aed006 | 1517 | goto drop; |
d342894c | 1518 | |
f14ecebb | 1519 | unparsed = *vxlan_hdr(skb); |
288b01c8 JB |
1520 | /* VNI flag always required to be set */ |
1521 | if (!(unparsed.vx_flags & VXLAN_HF_VNI)) { | |
1522 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1523 | ntohl(vxlan_hdr(skb)->vx_flags), | |
1524 | ntohl(vxlan_hdr(skb)->vx_vni)); | |
1525 | /* Return non vxlan pkt */ | |
e5aed006 | 1526 | goto drop; |
d342894c | 1527 | } |
288b01c8 JB |
1528 | unparsed.vx_flags &= ~VXLAN_HF_VNI; |
1529 | unparsed.vx_vni &= ~VXLAN_VNI_MASK; | |
d342894c | 1530 | |
559835ea | 1531 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1532 | if (!vs) |
d342894c | 1533 | goto drop; |
d342894c | 1534 | |
3ad7a4b1 RP |
1535 | vni = vxlan_vni(vxlan_hdr(skb)->vx_vni); |
1536 | ||
49f810f0 | 1537 | vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni); |
c9e78efb JB |
1538 | if (!vxlan) |
1539 | goto drop; | |
1540 | ||
e1e5314d JB |
1541 | /* For backwards compatibility, only allow reserved fields to be |
1542 | * used by VXLAN extensions if explicitly requested. | |
1543 | */ | |
1544 | if (vs->flags & VXLAN_F_GPE) { | |
1545 | if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags)) | |
1546 | goto drop; | |
1547 | raw_proto = true; | |
1548 | } | |
1549 | ||
1550 | if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto, | |
1551 | !net_eq(vxlan->net, dev_net(vxlan->dev)))) | |
1552 | goto drop; | |
c9e78efb | 1553 | |
ee122c79 | 1554 | if (vxlan_collect_metadata(vs)) { |
10a5af23 | 1555 | struct metadata_dst *tun_dst; |
07dabf20 | 1556 | |
c29a70d2 | 1557 | tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
d817f432 | 1558 | key32_to_tunnel_id(vni), sizeof(*md)); |
c29a70d2 | 1559 | |
ee122c79 TG |
1560 | if (!tun_dst) |
1561 | goto drop; | |
1562 | ||
0f1b7354 | 1563 | md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
10a5af23 JB |
1564 | |
1565 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
ee122c79 TG |
1566 | } else { |
1567 | memset(md, 0, sizeof(*md)); | |
1568 | } | |
1569 | ||
f14ecebb JB |
1570 | if (vs->flags & VXLAN_F_REMCSUM_RX) |
1571 | if (!vxlan_remcsum(&unparsed, skb, vs->flags)) | |
1572 | goto drop; | |
1573 | if (vs->flags & VXLAN_F_GBP) | |
10a5af23 | 1574 | vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md); |
e1e5314d JB |
1575 | /* Note that GBP and GPE can never be active together. This is |
1576 | * ensured in vxlan_dev_configure. | |
1577 | */ | |
3511494c | 1578 | |
f14ecebb | 1579 | if (unparsed.vx_flags || unparsed.vx_vni) { |
3bf39475 TH |
1580 | /* If there are any unprocessed flags remaining treat |
1581 | * this as a malformed packet. This behavior diverges from | |
1582 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1583 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1584 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1585 | * is more robust and provides a little more security in |
1586 | * adding extensions to VXLAN. | |
1587 | */ | |
288b01c8 | 1588 | goto drop; |
3bf39475 TH |
1589 | } |
1590 | ||
e1e5314d | 1591 | if (!raw_proto) { |
3ad7a4b1 | 1592 | if (!vxlan_set_mac(vxlan, vs, skb, vni)) |
e1e5314d JB |
1593 | goto drop; |
1594 | } else { | |
8be0cfa4 | 1595 | skb_reset_mac_header(skb); |
e1e5314d JB |
1596 | skb->dev = vxlan->dev; |
1597 | skb->pkt_type = PACKET_HOST; | |
1598 | } | |
f2d1968e | 1599 | |
f2d1968e JB |
1600 | oiph = skb_network_header(skb); |
1601 | skb_reset_network_header(skb); | |
1602 | ||
1603 | if (!vxlan_ecn_decapsulate(vs, oiph, skb)) { | |
1604 | ++vxlan->dev->stats.rx_frame_errors; | |
1605 | ++vxlan->dev->stats.rx_errors; | |
1606 | goto drop; | |
1607 | } | |
1608 | ||
1609 | stats = this_cpu_ptr(vxlan->dev->tstats); | |
1610 | u64_stats_update_begin(&stats->syncp); | |
1611 | stats->rx_packets++; | |
1612 | stats->rx_bytes += skb->len; | |
1613 | u64_stats_update_end(&stats->syncp); | |
1614 | ||
1615 | gro_cells_receive(&vxlan->gro_cells, skb); | |
5cfccc5a PS |
1616 | return 0; |
1617 | ||
1618 | drop: | |
288b01c8 JB |
1619 | /* Consume bad packet */ |
1620 | kfree_skb(skb); | |
1621 | return 0; | |
5cfccc5a PS |
1622 | } |
1623 | ||
3ad7a4b1 | 1624 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
e4f67add DS |
1625 | { |
1626 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1627 | struct arphdr *parp; | |
1628 | u8 *arpptr, *sha; | |
1629 | __be32 sip, tip; | |
1630 | struct neighbour *n; | |
1631 | ||
1632 | if (dev->flags & IFF_NOARP) | |
1633 | goto out; | |
1634 | ||
1635 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1636 | dev->stats.tx_dropped++; | |
1637 | goto out; | |
1638 | } | |
1639 | parp = arp_hdr(skb); | |
1640 | ||
1641 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1642 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1643 | parp->ar_pro != htons(ETH_P_IP) || | |
1644 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1645 | parp->ar_hln != dev->addr_len || | |
1646 | parp->ar_pln != 4) | |
1647 | goto out; | |
1648 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1649 | sha = arpptr; | |
1650 | arpptr += dev->addr_len; /* sha */ | |
1651 | memcpy(&sip, arpptr, sizeof(sip)); | |
1652 | arpptr += sizeof(sip); | |
1653 | arpptr += dev->addr_len; /* tha */ | |
1654 | memcpy(&tip, arpptr, sizeof(tip)); | |
1655 | ||
1656 | if (ipv4_is_loopback(tip) || | |
1657 | ipv4_is_multicast(tip)) | |
1658 | goto out; | |
1659 | ||
1660 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1661 | ||
1662 | if (n) { | |
e4f67add DS |
1663 | struct vxlan_fdb *f; |
1664 | struct sk_buff *reply; | |
1665 | ||
1666 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1667 | neigh_release(n); | |
1668 | goto out; | |
1669 | } | |
1670 | ||
3ad7a4b1 | 1671 | f = vxlan_find_mac(vxlan, n->ha, vni); |
e4c7ed41 | 1672 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1673 | /* bridge-local neighbor */ |
1674 | neigh_release(n); | |
1675 | goto out; | |
1676 | } | |
1677 | ||
1678 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1679 | n->ha, sha); | |
1680 | ||
1681 | neigh_release(n); | |
1682 | ||
7346135d DS |
1683 | if (reply == NULL) |
1684 | goto out; | |
1685 | ||
e4f67add DS |
1686 | skb_reset_mac_header(reply); |
1687 | __skb_pull(reply, skb_network_offset(reply)); | |
1688 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1689 | reply->pkt_type = PACKET_HOST; | |
1690 | ||
1691 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1692 | dev->stats.rx_dropped++; | |
dc5321d7 | 1693 | } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) { |
e4c7ed41 CW |
1694 | union vxlan_addr ipa = { |
1695 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1696 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1697 | }; |
1698 | ||
1699 | vxlan_ip_miss(dev, &ipa); | |
1700 | } | |
e4f67add DS |
1701 | out: |
1702 | consume_skb(skb); | |
1703 | return NETDEV_TX_OK; | |
1704 | } | |
1705 | ||
f564f45c | 1706 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1707 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1708 | struct neighbour *n, bool isrouter) | |
1709 | { | |
1710 | struct net_device *dev = request->dev; | |
1711 | struct sk_buff *reply; | |
1712 | struct nd_msg *ns, *na; | |
1713 | struct ipv6hdr *pip6; | |
1714 | u8 *daddr; | |
1715 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1716 | int ns_olen; | |
1717 | int i, len; | |
1718 | ||
f1fb08f6 | 1719 | if (dev == NULL || !pskb_may_pull(request, request->len)) |
4b29dba9 DS |
1720 | return NULL; |
1721 | ||
1722 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1723 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1724 | reply = alloc_skb(len, GFP_ATOMIC); | |
1725 | if (reply == NULL) | |
1726 | return NULL; | |
1727 | ||
1728 | reply->protocol = htons(ETH_P_IPV6); | |
1729 | reply->dev = dev; | |
1730 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1731 | skb_push(reply, sizeof(struct ethhdr)); | |
6297b91c | 1732 | skb_reset_mac_header(reply); |
4b29dba9 | 1733 | |
f1fb08f6 | 1734 | ns = (struct nd_msg *)(ipv6_hdr(request) + 1); |
4b29dba9 DS |
1735 | |
1736 | daddr = eth_hdr(request)->h_source; | |
f1fb08f6 VB |
1737 | ns_olen = request->len - skb_network_offset(request) - |
1738 | sizeof(struct ipv6hdr) - sizeof(*ns); | |
4b29dba9 DS |
1739 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { |
1740 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1741 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1742 | break; | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | /* Ethernet header */ | |
1747 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1748 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1749 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1750 | reply->protocol = htons(ETH_P_IPV6); | |
1751 | ||
1752 | skb_pull(reply, sizeof(struct ethhdr)); | |
6297b91c | 1753 | skb_reset_network_header(reply); |
4b29dba9 DS |
1754 | skb_put(reply, sizeof(struct ipv6hdr)); |
1755 | ||
1756 | /* IPv6 header */ | |
1757 | ||
1758 | pip6 = ipv6_hdr(reply); | |
1759 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1760 | pip6->version = 6; | |
1761 | pip6->priority = ipv6_hdr(request)->priority; | |
1762 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1763 | pip6->hop_limit = 255; | |
1764 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1765 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1766 | ||
1767 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
6297b91c | 1768 | skb_reset_transport_header(reply); |
4b29dba9 | 1769 | |
4b29dba9 | 1770 | /* Neighbor Advertisement */ |
b080db58 | 1771 | na = skb_put_zero(reply, sizeof(*na) + na_olen); |
4b29dba9 DS |
1772 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; |
1773 | na->icmph.icmp6_router = isrouter; | |
1774 | na->icmph.icmp6_override = 1; | |
1775 | na->icmph.icmp6_solicited = 1; | |
1776 | na->target = ns->target; | |
1777 | ether_addr_copy(&na->opt[2], n->ha); | |
1778 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1779 | na->opt[1] = na_olen >> 3; | |
1780 | ||
1781 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1782 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1783 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1784 | ||
1785 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1786 | ||
1787 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1788 | ||
1789 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1790 | ||
1791 | return reply; | |
1792 | } | |
1793 | ||
3ad7a4b1 | 1794 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
f564f45c CW |
1795 | { |
1796 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1797 | struct nd_msg *msg; |
f564f45c | 1798 | const struct ipv6hdr *iphdr; |
8dcd81a9 | 1799 | const struct in6_addr *daddr; |
4b29dba9 DS |
1800 | struct neighbour *n; |
1801 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1802 | |
1803 | in6_dev = __in6_dev_get(dev); | |
1804 | if (!in6_dev) | |
1805 | goto out; | |
1806 | ||
f1fb08f6 VB |
1807 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + sizeof(struct nd_msg))) |
1808 | goto out; | |
1809 | ||
f564f45c | 1810 | iphdr = ipv6_hdr(skb); |
f564f45c CW |
1811 | daddr = &iphdr->daddr; |
1812 | ||
f1fb08f6 | 1813 | msg = (struct nd_msg *)(iphdr + 1); |
f564f45c CW |
1814 | if (msg->icmph.icmp6_code != 0 || |
1815 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1816 | goto out; | |
1817 | ||
4b29dba9 DS |
1818 | if (ipv6_addr_loopback(daddr) || |
1819 | ipv6_addr_is_multicast(&msg->target)) | |
1820 | goto out; | |
1821 | ||
1822 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1823 | |
1824 | if (n) { | |
1825 | struct vxlan_fdb *f; | |
4b29dba9 | 1826 | struct sk_buff *reply; |
f564f45c CW |
1827 | |
1828 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1829 | neigh_release(n); | |
1830 | goto out; | |
1831 | } | |
1832 | ||
3ad7a4b1 | 1833 | f = vxlan_find_mac(vxlan, n->ha, vni); |
f564f45c CW |
1834 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
1835 | /* bridge-local neighbor */ | |
1836 | neigh_release(n); | |
1837 | goto out; | |
1838 | } | |
1839 | ||
4b29dba9 DS |
1840 | reply = vxlan_na_create(skb, n, |
1841 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1842 | ||
f564f45c | 1843 | neigh_release(n); |
4b29dba9 DS |
1844 | |
1845 | if (reply == NULL) | |
1846 | goto out; | |
1847 | ||
1848 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1849 | dev->stats.rx_dropped++; | |
1850 | ||
dc5321d7 | 1851 | } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1852 | union vxlan_addr ipa = { |
1853 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1854 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1855 | }; |
1856 | ||
f564f45c CW |
1857 | vxlan_ip_miss(dev, &ipa); |
1858 | } | |
1859 | ||
1860 | out: | |
1861 | consume_skb(skb); | |
1862 | return NETDEV_TX_OK; | |
1863 | } | |
1864 | #endif | |
1865 | ||
e4f67add DS |
1866 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1867 | { | |
1868 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1869 | struct neighbour *n; | |
e4f67add DS |
1870 | |
1871 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1872 | return false; | |
1873 | ||
1874 | n = NULL; | |
1875 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1876 | case ETH_P_IP: | |
e15a00aa CW |
1877 | { |
1878 | struct iphdr *pip; | |
1879 | ||
e4f67add DS |
1880 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1881 | return false; | |
1882 | pip = ip_hdr(skb); | |
1883 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
dc5321d7 | 1884 | if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) { |
e4c7ed41 CW |
1885 | union vxlan_addr ipa = { |
1886 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 1887 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1888 | }; |
1889 | ||
1890 | vxlan_ip_miss(dev, &ipa); | |
1891 | return false; | |
1892 | } | |
1893 | ||
e4f67add | 1894 | break; |
e15a00aa CW |
1895 | } |
1896 | #if IS_ENABLED(CONFIG_IPV6) | |
1897 | case ETH_P_IPV6: | |
1898 | { | |
1899 | struct ipv6hdr *pip6; | |
1900 | ||
1901 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1902 | return false; | |
1903 | pip6 = ipv6_hdr(skb); | |
1904 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
dc5321d7 | 1905 | if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) { |
e15a00aa CW |
1906 | union vxlan_addr ipa = { |
1907 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 1908 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
1909 | }; |
1910 | ||
1911 | vxlan_ip_miss(dev, &ipa); | |
1912 | return false; | |
1913 | } | |
1914 | ||
1915 | break; | |
1916 | } | |
1917 | #endif | |
e4f67add DS |
1918 | default: |
1919 | return false; | |
1920 | } | |
1921 | ||
1922 | if (n) { | |
1923 | bool diff; | |
1924 | ||
7367d0b5 | 1925 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1926 | if (diff) { |
1927 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1928 | dev->addr_len); | |
1929 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1930 | } | |
1931 | neigh_release(n); | |
1932 | return diff; | |
e4c7ed41 CW |
1933 | } |
1934 | ||
e4f67add DS |
1935 | return false; |
1936 | } | |
1937 | ||
af33c1ad | 1938 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
1939 | struct vxlan_metadata *md) |
1940 | { | |
1941 | struct vxlanhdr_gbp *gbp; | |
1942 | ||
db79a621 TG |
1943 | if (!md->gbp) |
1944 | return; | |
1945 | ||
3511494c | 1946 | gbp = (struct vxlanhdr_gbp *)vxh; |
54bfd872 | 1947 | vxh->vx_flags |= VXLAN_HF_GBP; |
3511494c TG |
1948 | |
1949 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
1950 | gbp->dont_learn = 1; | |
1951 | ||
1952 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
1953 | gbp->policy_applied = 1; | |
1954 | ||
1955 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
1956 | } | |
1957 | ||
e1e5314d JB |
1958 | static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags, |
1959 | __be16 protocol) | |
1960 | { | |
1961 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh; | |
1962 | ||
1963 | gpe->np_applied = 1; | |
1964 | ||
1965 | switch (protocol) { | |
1966 | case htons(ETH_P_IP): | |
1967 | gpe->next_protocol = VXLAN_GPE_NP_IPV4; | |
1968 | return 0; | |
1969 | case htons(ETH_P_IPV6): | |
1970 | gpe->next_protocol = VXLAN_GPE_NP_IPV6; | |
1971 | return 0; | |
1972 | case htons(ETH_P_TEB): | |
1973 | gpe->next_protocol = VXLAN_GPE_NP_ETHERNET; | |
1974 | return 0; | |
1975 | } | |
1976 | return -EPFNOSUPPORT; | |
1977 | } | |
1978 | ||
f491e56d JB |
1979 | static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst, |
1980 | int iphdr_len, __be32 vni, | |
1981 | struct vxlan_metadata *md, u32 vxflags, | |
b4ed5cad | 1982 | bool udp_sum) |
e4c7ed41 | 1983 | { |
e4c7ed41 | 1984 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
1985 | int min_headroom; |
1986 | int err; | |
dfd8645e | 1987 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
e1e5314d | 1988 | __be16 inner_protocol = htons(ETH_P_TEB); |
dfd8645e | 1989 | |
af33c1ad | 1990 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1991 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1992 | int csum_start = skb_checksum_start_offset(skb); | |
1993 | ||
1994 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1995 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1996 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
b5708501 | 1997 | skb->csum_offset == offsetof(struct tcphdr, check))) |
dfd8645e | 1998 | type |= SKB_GSO_TUNNEL_REMCSUM; |
dfd8645e | 1999 | } |
e4c7ed41 | 2000 | |
e4c7ed41 | 2001 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
4a4f86cc | 2002 | + VXLAN_HLEN + iphdr_len; |
649c5b8b PS |
2003 | |
2004 | /* Need space for new headers (invalidates iph ptr) */ | |
2005 | err = skb_cow_head(skb, min_headroom); | |
e1e5314d | 2006 | if (unlikely(err)) |
c46b7897 | 2007 | return err; |
649c5b8b | 2008 | |
aed069df AD |
2009 | err = iptunnel_handle_offloads(skb, type); |
2010 | if (err) | |
c46b7897 | 2011 | return err; |
b736a623 | 2012 | |
d58ff351 | 2013 | vxh = __skb_push(skb, sizeof(*vxh)); |
54bfd872 JB |
2014 | vxh->vx_flags = VXLAN_HF_VNI; |
2015 | vxh->vx_vni = vxlan_vni_field(vni); | |
49560532 | 2016 | |
dfd8645e | 2017 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
54bfd872 | 2018 | unsigned int start; |
dfd8645e | 2019 | |
54bfd872 JB |
2020 | start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr); |
2021 | vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset); | |
2022 | vxh->vx_flags |= VXLAN_HF_RCO; | |
dfd8645e TH |
2023 | |
2024 | if (!skb_is_gso(skb)) { | |
2025 | skb->ip_summed = CHECKSUM_NONE; | |
2026 | skb->encapsulation = 0; | |
2027 | } | |
2028 | } | |
2029 | ||
af33c1ad TH |
2030 | if (vxflags & VXLAN_F_GBP) |
2031 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
e1e5314d JB |
2032 | if (vxflags & VXLAN_F_GPE) { |
2033 | err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol); | |
2034 | if (err < 0) | |
c46b7897 | 2035 | return err; |
e1e5314d JB |
2036 | inner_protocol = skb->protocol; |
2037 | } | |
3511494c | 2038 | |
e1e5314d | 2039 | skb_set_inner_protocol(skb, inner_protocol); |
039f5062 | 2040 | return 0; |
49560532 | 2041 | } |
49560532 | 2042 | |
655c3de1 | 2043 | static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev, |
2044 | struct vxlan_sock *sock4, | |
1a8496ba | 2045 | struct sk_buff *skb, int oif, u8 tos, |
4ecb1d83 | 2046 | __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport, |
0c1d70af | 2047 | struct dst_cache *dst_cache, |
db3c6139 | 2048 | const struct ip_tunnel_info *info) |
1a8496ba | 2049 | { |
db3c6139 | 2050 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
1a8496ba JB |
2051 | struct rtable *rt = NULL; |
2052 | struct flowi4 fl4; | |
2053 | ||
655c3de1 | 2054 | if (!sock4) |
2055 | return ERR_PTR(-EIO); | |
2056 | ||
db3c6139 DB |
2057 | if (tos && !info) |
2058 | use_cache = false; | |
2059 | if (use_cache) { | |
0c1d70af PA |
2060 | rt = dst_cache_get_ip4(dst_cache, saddr); |
2061 | if (rt) | |
2062 | return rt; | |
2063 | } | |
2064 | ||
1a8496ba JB |
2065 | memset(&fl4, 0, sizeof(fl4)); |
2066 | fl4.flowi4_oif = oif; | |
2067 | fl4.flowi4_tos = RT_TOS(tos); | |
2068 | fl4.flowi4_mark = skb->mark; | |
2069 | fl4.flowi4_proto = IPPROTO_UDP; | |
2070 | fl4.daddr = daddr; | |
272d96a5 | 2071 | fl4.saddr = *saddr; |
4ecb1d83 MP |
2072 | fl4.fl4_dport = dport; |
2073 | fl4.fl4_sport = sport; | |
1a8496ba JB |
2074 | |
2075 | rt = ip_route_output_key(vxlan->net, &fl4); | |
655c3de1 | 2076 | if (likely(!IS_ERR(rt))) { |
2077 | if (rt->dst.dev == dev) { | |
2078 | netdev_dbg(dev, "circular route to %pI4\n", &daddr); | |
2079 | ip_rt_put(rt); | |
2080 | return ERR_PTR(-ELOOP); | |
2081 | } | |
2082 | ||
1a8496ba | 2083 | *saddr = fl4.saddr; |
0c1d70af PA |
2084 | if (use_cache) |
2085 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); | |
655c3de1 | 2086 | } else { |
2087 | netdev_dbg(dev, "no route to %pI4\n", &daddr); | |
2088 | return ERR_PTR(-ENETUNREACH); | |
0c1d70af | 2089 | } |
1a8496ba JB |
2090 | return rt; |
2091 | } | |
2092 | ||
e5d4b29f JB |
2093 | #if IS_ENABLED(CONFIG_IPV6) |
2094 | static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan, | |
655c3de1 | 2095 | struct net_device *dev, |
03dc52a8 | 2096 | struct vxlan_sock *sock6, |
1400615d | 2097 | struct sk_buff *skb, int oif, u8 tos, |
e7f70af1 | 2098 | __be32 label, |
e5d4b29f | 2099 | const struct in6_addr *daddr, |
0c1d70af | 2100 | struct in6_addr *saddr, |
4ecb1d83 | 2101 | __be16 dport, __be16 sport, |
db3c6139 DB |
2102 | struct dst_cache *dst_cache, |
2103 | const struct ip_tunnel_info *info) | |
e5d4b29f | 2104 | { |
db3c6139 | 2105 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e5d4b29f JB |
2106 | struct dst_entry *ndst; |
2107 | struct flowi6 fl6; | |
2108 | int err; | |
2109 | ||
c6fcc4fc | 2110 | if (!sock6) |
2111 | return ERR_PTR(-EIO); | |
2112 | ||
1400615d DB |
2113 | if (tos && !info) |
2114 | use_cache = false; | |
db3c6139 | 2115 | if (use_cache) { |
0c1d70af PA |
2116 | ndst = dst_cache_get_ip6(dst_cache, saddr); |
2117 | if (ndst) | |
2118 | return ndst; | |
2119 | } | |
2120 | ||
e5d4b29f JB |
2121 | memset(&fl6, 0, sizeof(fl6)); |
2122 | fl6.flowi6_oif = oif; | |
2123 | fl6.daddr = *daddr; | |
272d96a5 | 2124 | fl6.saddr = *saddr; |
eaa93bf4 | 2125 | fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label); |
e5d4b29f JB |
2126 | fl6.flowi6_mark = skb->mark; |
2127 | fl6.flowi6_proto = IPPROTO_UDP; | |
4ecb1d83 MP |
2128 | fl6.fl6_dport = dport; |
2129 | fl6.fl6_sport = sport; | |
e5d4b29f JB |
2130 | |
2131 | err = ipv6_stub->ipv6_dst_lookup(vxlan->net, | |
c6fcc4fc | 2132 | sock6->sock->sk, |
e5d4b29f | 2133 | &ndst, &fl6); |
655c3de1 | 2134 | if (unlikely(err < 0)) { |
2135 | netdev_dbg(dev, "no route to %pI6\n", daddr); | |
2136 | return ERR_PTR(-ENETUNREACH); | |
2137 | } | |
2138 | ||
2139 | if (unlikely(ndst->dev == dev)) { | |
2140 | netdev_dbg(dev, "circular route to %pI6\n", daddr); | |
2141 | dst_release(ndst); | |
2142 | return ERR_PTR(-ELOOP); | |
2143 | } | |
e5d4b29f JB |
2144 | |
2145 | *saddr = fl6.saddr; | |
db3c6139 | 2146 | if (use_cache) |
0c1d70af | 2147 | dst_cache_set_ip6(dst_cache, ndst, saddr); |
e5d4b29f JB |
2148 | return ndst; |
2149 | } | |
2150 | #endif | |
2151 | ||
9dcc71e1 SS |
2152 | /* Bypass encapsulation if the destination is local */ |
2153 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
3ad7a4b1 | 2154 | struct vxlan_dev *dst_vxlan, __be32 vni) |
9dcc71e1 | 2155 | { |
8f84985f | 2156 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
2157 | union vxlan_addr loopback; |
2158 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
2159 | struct net_device *dev = skb->dev; |
2160 | int len = skb->len; | |
9dcc71e1 | 2161 | |
8f84985f LR |
2162 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
2163 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
2164 | skb->pkt_type = PACKET_HOST; |
2165 | skb->encapsulation = 0; | |
2166 | skb->dev = dst_vxlan->dev; | |
2167 | __skb_pull(skb, skb_network_offset(skb)); | |
2168 | ||
e4c7ed41 CW |
2169 | if (remote_ip->sa.sa_family == AF_INET) { |
2170 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
2171 | loopback.sa.sa_family = AF_INET; | |
2172 | #if IS_ENABLED(CONFIG_IPV6) | |
2173 | } else { | |
2174 | loopback.sin6.sin6_addr = in6addr_loopback; | |
2175 | loopback.sa.sa_family = AF_INET6; | |
2176 | #endif | |
2177 | } | |
2178 | ||
dc5321d7 | 2179 | if (dst_vxlan->cfg.flags & VXLAN_F_LEARN) |
87613de9 MS |
2180 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source, 0, |
2181 | vni); | |
9dcc71e1 SS |
2182 | |
2183 | u64_stats_update_begin(&tx_stats->syncp); | |
2184 | tx_stats->tx_packets++; | |
ce6502a8 | 2185 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
2186 | u64_stats_update_end(&tx_stats->syncp); |
2187 | ||
2188 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
2189 | u64_stats_update_begin(&rx_stats->syncp); | |
2190 | rx_stats->rx_packets++; | |
ce6502a8 | 2191 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
2192 | u64_stats_update_end(&rx_stats->syncp); |
2193 | } else { | |
ce6502a8 | 2194 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
2195 | } |
2196 | } | |
2197 | ||
fee1fad7 | 2198 | static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev, |
49f810f0 MS |
2199 | struct vxlan_dev *vxlan, |
2200 | union vxlan_addr *daddr, | |
2201 | __be16 dst_port, int dst_ifindex, __be32 vni, | |
2202 | struct dst_entry *dst, | |
fee1fad7 | 2203 | u32 rt_flags) |
2204 | { | |
2205 | #if IS_ENABLED(CONFIG_IPV6) | |
2206 | /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of | |
2207 | * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple | |
2208 | * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry. | |
2209 | */ | |
2210 | BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL); | |
2211 | #endif | |
2212 | /* Bypass encapsulation if the destination is local */ | |
2213 | if (rt_flags & RTCF_LOCAL && | |
2214 | !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
2215 | struct vxlan_dev *dst_vxlan; | |
2216 | ||
2217 | dst_release(dst); | |
49f810f0 | 2218 | dst_vxlan = vxlan_find_vni(vxlan->net, dst_ifindex, vni, |
fee1fad7 | 2219 | daddr->sa.sa_family, dst_port, |
dc5321d7 | 2220 | vxlan->cfg.flags); |
fee1fad7 | 2221 | if (!dst_vxlan) { |
2222 | dev->stats.tx_errors++; | |
2223 | kfree_skb(skb); | |
2224 | ||
2225 | return -ENOENT; | |
2226 | } | |
3ad7a4b1 | 2227 | vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni); |
fee1fad7 | 2228 | return 1; |
2229 | } | |
2230 | ||
2231 | return 0; | |
2232 | } | |
2233 | ||
4ad16930 | 2234 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
3ad7a4b1 RP |
2235 | __be32 default_vni, struct vxlan_rdst *rdst, |
2236 | bool did_rsc) | |
d342894c | 2237 | { |
d71785ff | 2238 | struct dst_cache *dst_cache; |
3093fbe7 | 2239 | struct ip_tunnel_info *info; |
d342894c | 2240 | struct vxlan_dev *vxlan = netdev_priv(dev); |
0770b53b | 2241 | const struct iphdr *old_iph = ip_hdr(skb); |
e4c7ed41 | 2242 | union vxlan_addr *dst; |
272d96a5 | 2243 | union vxlan_addr remote_ip, local_ip; |
ee122c79 TG |
2244 | struct vxlan_metadata _md; |
2245 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 2246 | __be16 src_port = 0, dst_port; |
655c3de1 | 2247 | struct dst_entry *ndst = NULL; |
e7f70af1 | 2248 | __be32 vni, label; |
d342894c | 2249 | __u8 tos, ttl; |
49f810f0 | 2250 | int ifindex; |
0e6fbc5b | 2251 | int err; |
dc5321d7 | 2252 | u32 flags = vxlan->cfg.flags; |
b4ed5cad | 2253 | bool udp_sum = false; |
f491e56d | 2254 | bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev)); |
d342894c | 2255 | |
61adedf3 | 2256 | info = skb_tunnel_info(skb); |
3093fbe7 | 2257 | |
ee122c79 | 2258 | if (rdst) { |
0770b53b | 2259 | dst = &rdst->remote_ip; |
2260 | if (vxlan_addr_any(dst)) { | |
2261 | if (did_rsc) { | |
2262 | /* short-circuited back to local bridge */ | |
3ad7a4b1 | 2263 | vxlan_encap_bypass(skb, vxlan, vxlan, default_vni); |
0770b53b | 2264 | return; |
2265 | } | |
2266 | goto drop; | |
2267 | } | |
2268 | ||
0dfbdf41 | 2269 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
3ad7a4b1 | 2270 | vni = (rdst->remote_vni) ? : default_vni; |
49f810f0 | 2271 | ifindex = rdst->remote_ifindex; |
1158632b | 2272 | local_ip = vxlan->cfg.saddr; |
d71785ff | 2273 | dst_cache = &rdst->dst_cache; |
0770b53b | 2274 | md->gbp = skb->mark; |
2275 | ttl = vxlan->cfg.ttl; | |
2276 | if (!ttl && vxlan_addr_multicast(dst)) | |
2277 | ttl = 1; | |
2278 | ||
2279 | tos = vxlan->cfg.tos; | |
2280 | if (tos == 1) | |
2281 | tos = ip_tunnel_get_dsfield(old_iph, skb); | |
2282 | ||
2283 | if (dst->sa.sa_family == AF_INET) | |
2284 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX); | |
2285 | else | |
2286 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); | |
2287 | label = vxlan->cfg.label; | |
ee122c79 TG |
2288 | } else { |
2289 | if (!info) { | |
2290 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
2291 | dev->name); | |
2292 | goto drop; | |
2293 | } | |
b1be00a6 | 2294 | remote_ip.sa.sa_family = ip_tunnel_info_af(info); |
272d96a5 | 2295 | if (remote_ip.sa.sa_family == AF_INET) { |
a725e514 | 2296 | remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; |
272d96a5 | 2297 | local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src; |
2298 | } else { | |
a725e514 | 2299 | remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; |
272d96a5 | 2300 | local_ip.sin6.sin6_addr = info->key.u.ipv6.src; |
2301 | } | |
ee122c79 | 2302 | dst = &remote_ip; |
0770b53b | 2303 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
2304 | vni = tunnel_id_to_key32(info->key.tun_id); | |
49f810f0 | 2305 | ifindex = 0; |
d71785ff | 2306 | dst_cache = &info->dst_cache; |
0770b53b | 2307 | if (info->options_len) |
2308 | md = ip_tunnel_info_opts(info); | |
a725e514 JB |
2309 | ttl = info->key.ttl; |
2310 | tos = info->key.tos; | |
e7f70af1 | 2311 | label = info->key.label; |
b4ed5cad | 2312 | udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
a725e514 | 2313 | } |
0770b53b | 2314 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
2315 | vxlan->cfg.port_max, true); | |
a725e514 | 2316 | |
56de859e | 2317 | rcu_read_lock(); |
e4c7ed41 | 2318 | if (dst->sa.sa_family == AF_INET) { |
c6fcc4fc | 2319 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
c46b7897 | 2320 | struct rtable *rt; |
0770b53b | 2321 | __be16 df = 0; |
c6fcc4fc | 2322 | |
49f810f0 | 2323 | rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos, |
272d96a5 | 2324 | dst->sin.sin_addr.s_addr, |
1158632b | 2325 | &local_ip.sin.sin_addr.s_addr, |
4ecb1d83 | 2326 | dst_port, src_port, |
d71785ff | 2327 | dst_cache, info); |
8ebd115b DM |
2328 | if (IS_ERR(rt)) { |
2329 | err = PTR_ERR(rt); | |
c46b7897 | 2330 | goto tx_error; |
8ebd115b | 2331 | } |
e4c7ed41 | 2332 | |
11cd9476 JV |
2333 | if (fan_has_map(&vxlan->fan) && rt->rt_flags & RTCF_LOCAL) { |
2334 | netdev_dbg(dev, "discard fan to localhost %pI4\n", | |
2335 | &dst->sin.sin_addr.s_addr); | |
2336 | ip_rt_put(rt); | |
2337 | goto tx_free; | |
2338 | } | |
2339 | ||
e4c7ed41 | 2340 | /* Bypass encapsulation if the destination is local */ |
fee1fad7 | 2341 | if (!info) { |
2342 | err = encap_bypass_if_local(skb, dev, vxlan, dst, | |
49f810f0 MS |
2343 | dst_port, ifindex, vni, |
2344 | &rt->dst, rt->rt_flags); | |
fee1fad7 | 2345 | if (err) |
56de859e | 2346 | goto out_unlock; |
fee1fad7 | 2347 | } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) { |
6ceb31ca | 2348 | df = htons(IP_DF); |
fee1fad7 | 2349 | } |
6ceb31ca | 2350 | |
c46b7897 | 2351 | ndst = &rt->dst; |
e4c7ed41 CW |
2352 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
2353 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
c46b7897 | 2354 | err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr), |
54bfd872 | 2355 | vni, md, flags, udp_sum); |
f491e56d | 2356 | if (err < 0) |
c46b7897 | 2357 | goto tx_error; |
f491e56d | 2358 | |
1158632b | 2359 | udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr, |
f491e56d JB |
2360 | dst->sin.sin_addr.s_addr, tos, ttl, df, |
2361 | src_port, dst_port, xnet, !udp_sum); | |
e4c7ed41 CW |
2362 | #if IS_ENABLED(CONFIG_IPV6) |
2363 | } else { | |
c6fcc4fc | 2364 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
e4c7ed41 | 2365 | |
49f810f0 | 2366 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, ifindex, tos, |
272d96a5 | 2367 | label, &dst->sin6.sin6_addr, |
1158632b | 2368 | &local_ip.sin6.sin6_addr, |
4ecb1d83 | 2369 | dst_port, src_port, |
db3c6139 | 2370 | dst_cache, info); |
e5d4b29f | 2371 | if (IS_ERR(ndst)) { |
8ebd115b | 2372 | err = PTR_ERR(ndst); |
c46b7897 | 2373 | ndst = NULL; |
9dcc71e1 | 2374 | goto tx_error; |
e4c7ed41 | 2375 | } |
655c3de1 | 2376 | |
fee1fad7 | 2377 | if (!info) { |
2378 | u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
49560532 | 2379 | |
fee1fad7 | 2380 | err = encap_bypass_if_local(skb, dev, vxlan, dst, |
49f810f0 MS |
2381 | dst_port, ifindex, vni, |
2382 | ndst, rt6i_flags); | |
fee1fad7 | 2383 | if (err) |
56de859e | 2384 | goto out_unlock; |
fee1fad7 | 2385 | } |
35e2d115 | 2386 | |
1400615d | 2387 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
e4c7ed41 | 2388 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
f491e56d JB |
2389 | skb_scrub_packet(skb, xnet); |
2390 | err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr), | |
54bfd872 | 2391 | vni, md, flags, udp_sum); |
c46b7897 | 2392 | if (err < 0) |
2393 | goto tx_error; | |
2394 | ||
0770b53b | 2395 | udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev, |
1158632b | 2396 | &local_ip.sin6.sin6_addr, |
272d96a5 | 2397 | &dst->sin6.sin6_addr, tos, ttl, |
e7f70af1 | 2398 | label, src_port, dst_port, !udp_sum); |
e4c7ed41 CW |
2399 | #endif |
2400 | } | |
56de859e JK |
2401 | out_unlock: |
2402 | rcu_read_unlock(); | |
4ad16930 | 2403 | return; |
d342894c | 2404 | |
2405 | drop: | |
2406 | dev->stats.tx_dropped++; | |
c46b7897 | 2407 | dev_kfree_skb(skb); |
2408 | return; | |
d342894c | 2409 | |
2410 | tx_error: | |
56de859e | 2411 | rcu_read_unlock(); |
655c3de1 | 2412 | if (err == -ELOOP) |
2413 | dev->stats.collisions++; | |
2414 | else if (err == -ENETUNREACH) | |
2415 | dev->stats.tx_carrier_errors++; | |
c46b7897 | 2416 | dst_release(ndst); |
d342894c | 2417 | dev->stats.tx_errors++; |
11cd9476 | 2418 | tx_free: |
c46b7897 | 2419 | kfree_skb(skb); |
d342894c | 2420 | } |
2421 | ||
6681712d DS |
2422 | /* Transmit local packets over Vxlan |
2423 | * | |
2424 | * Outer IP header inherits ECN and DF from inner header. | |
2425 | * Outer UDP destination is the VXLAN assigned port. | |
2426 | * source port is based on hash of flow | |
2427 | */ | |
2428 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2429 | { | |
2430 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3093fbe7 | 2431 | const struct ip_tunnel_info *info; |
6681712d DS |
2432 | struct ethhdr *eth; |
2433 | bool did_rsc = false; | |
8f646c92 | 2434 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 2435 | struct vxlan_fdb *f; |
3ad7a4b1 | 2436 | __be32 vni = 0; |
6681712d | 2437 | |
61adedf3 | 2438 | info = skb_tunnel_info(skb); |
3093fbe7 | 2439 | |
6681712d | 2440 | skb_reset_mac_header(skb); |
6681712d | 2441 | |
dc5321d7 | 2442 | if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) { |
3ad7a4b1 RP |
2443 | if (info && info->mode & IP_TUNNEL_INFO_BRIDGE && |
2444 | info->mode & IP_TUNNEL_INFO_TX) { | |
2445 | vni = tunnel_id_to_key32(info->key.tun_id); | |
2446 | } else { | |
2447 | if (info && info->mode & IP_TUNNEL_INFO_TX) | |
2448 | vxlan_xmit_one(skb, dev, vni, NULL, false); | |
2449 | else | |
2450 | kfree_skb(skb); | |
2451 | return NETDEV_TX_OK; | |
2452 | } | |
47e5d1b0 JB |
2453 | } |
2454 | ||
dc5321d7 | 2455 | if (vxlan->cfg.flags & VXLAN_F_PROXY) { |
47e5d1b0 | 2456 | eth = eth_hdr(skb); |
f564f45c | 2457 | if (ntohs(eth->h_proto) == ETH_P_ARP) |
3ad7a4b1 | 2458 | return arp_reduce(dev, skb, vni); |
f564f45c | 2459 | #if IS_ENABLED(CONFIG_IPV6) |
f1fb08f6 VB |
2460 | else if (ntohs(eth->h_proto) == ETH_P_IPV6) { |
2461 | struct ipv6hdr *hdr, _hdr; | |
2462 | if ((hdr = skb_header_pointer(skb, | |
2463 | skb_network_offset(skb), | |
2464 | sizeof(_hdr), &_hdr)) && | |
2465 | hdr->nexthdr == IPPROTO_ICMPV6) | |
2466 | return neigh_reduce(dev, skb, vni); | |
f564f45c CW |
2467 | } |
2468 | #endif | |
2469 | } | |
6681712d | 2470 | |
11cd9476 JV |
2471 | if (fan_has_map(&vxlan->fan)) { |
2472 | struct vxlan_rdst fan_rdst; | |
2473 | ||
2474 | netdev_dbg(vxlan->dev, "vxlan_xmit p %x d %pM\n", | |
2475 | eth->h_proto, eth->h_dest); | |
2476 | if (vxlan_fan_build_rdst(vxlan, skb, &fan_rdst)) { | |
2477 | dev->stats.tx_dropped++; | |
2478 | kfree_skb(skb); | |
2479 | return NETDEV_TX_OK; | |
2480 | } | |
2481 | vxlan_xmit_one(skb, dev, vni, &fan_rdst, 0); | |
2482 | return NETDEV_TX_OK; | |
2483 | } | |
2484 | ||
47e5d1b0 | 2485 | eth = eth_hdr(skb); |
3ad7a4b1 | 2486 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2487 | did_rsc = false; |
2488 | ||
dc5321d7 | 2489 | if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) && |
e15a00aa CW |
2490 | (ntohs(eth->h_proto) == ETH_P_IP || |
2491 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2492 | did_rsc = route_shortcircuit(dev, skb); |
2493 | if (did_rsc) | |
3ad7a4b1 | 2494 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2495 | } |
2496 | ||
6681712d | 2497 | if (f == NULL) { |
3ad7a4b1 | 2498 | f = vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae | 2499 | if (f == NULL) { |
dc5321d7 | 2500 | if ((vxlan->cfg.flags & VXLAN_F_L2MISS) && |
afbd8bae MR |
2501 | !is_multicast_ether_addr(eth->h_dest)) |
2502 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2503 | ||
2504 | dev->stats.tx_dropped++; | |
8f646c92 | 2505 | kfree_skb(skb); |
afbd8bae MR |
2506 | return NETDEV_TX_OK; |
2507 | } | |
2508 | } | |
6681712d | 2509 | |
afbd8bae MR |
2510 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2511 | struct sk_buff *skb1; | |
6681712d | 2512 | |
8f646c92 ED |
2513 | if (!fdst) { |
2514 | fdst = rdst; | |
2515 | continue; | |
2516 | } | |
afbd8bae MR |
2517 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2518 | if (skb1) | |
3ad7a4b1 | 2519 | vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc); |
6681712d DS |
2520 | } |
2521 | ||
8f646c92 | 2522 | if (fdst) |
3ad7a4b1 | 2523 | vxlan_xmit_one(skb, dev, vni, fdst, did_rsc); |
8f646c92 ED |
2524 | else |
2525 | kfree_skb(skb); | |
4ad16930 | 2526 | return NETDEV_TX_OK; |
6681712d DS |
2527 | } |
2528 | ||
d342894c | 2529 | /* Walk the forwarding table and purge stale entries */ |
2530 | static void vxlan_cleanup(unsigned long arg) | |
2531 | { | |
2532 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2533 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2534 | unsigned int h; | |
2535 | ||
2536 | if (!netif_running(vxlan->dev)) | |
2537 | return; | |
2538 | ||
d342894c | 2539 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2540 | struct hlist_node *p, *n; | |
14e1d0fa SD |
2541 | |
2542 | spin_lock_bh(&vxlan->hash_lock); | |
d342894c | 2543 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2544 | struct vxlan_fdb *f | |
2545 | = container_of(p, struct vxlan_fdb, hlist); | |
2546 | unsigned long timeout; | |
2547 | ||
efb5f68f | 2548 | if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
d342894c | 2549 | continue; |
2550 | ||
def499c9 RP |
2551 | if (f->flags & NTF_EXT_LEARNED) |
2552 | continue; | |
2553 | ||
0dfbdf41 | 2554 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2555 | if (time_before_eq(timeout, jiffies)) { |
2556 | netdev_dbg(vxlan->dev, | |
2557 | "garbage collect %pM\n", | |
2558 | f->eth_addr); | |
2559 | f->state = NUD_STALE; | |
2560 | vxlan_fdb_destroy(vxlan, f); | |
2561 | } else if (time_before(timeout, next_timer)) | |
2562 | next_timer = timeout; | |
2563 | } | |
14e1d0fa | 2564 | spin_unlock_bh(&vxlan->hash_lock); |
d342894c | 2565 | } |
d342894c | 2566 | |
2567 | mod_timer(&vxlan->age_timer, next_timer); | |
2568 | } | |
2569 | ||
a53cb29b MB |
2570 | static void vxlan_vs_del_dev(struct vxlan_dev *vxlan) |
2571 | { | |
2572 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); | |
2573 | ||
2574 | spin_lock(&vn->sock_lock); | |
69e76661 JB |
2575 | hlist_del_init_rcu(&vxlan->hlist4.hlist); |
2576 | #if IS_ENABLED(CONFIG_IPV6) | |
2577 | hlist_del_init_rcu(&vxlan->hlist6.hlist); | |
2578 | #endif | |
a53cb29b MB |
2579 | spin_unlock(&vn->sock_lock); |
2580 | } | |
2581 | ||
69e76661 JB |
2582 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan, |
2583 | struct vxlan_dev_node *node) | |
9c2e24e1 | 2584 | { |
56ef9c90 | 2585 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
54bfd872 | 2586 | __be32 vni = vxlan->default_dst.remote_vni; |
9c2e24e1 | 2587 | |
69e76661 | 2588 | node->vxlan = vxlan; |
56ef9c90 | 2589 | spin_lock(&vn->sock_lock); |
69e76661 | 2590 | hlist_add_head_rcu(&node->hlist, vni_head(vs, vni)); |
56ef9c90 | 2591 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
2592 | } |
2593 | ||
d342894c | 2594 | /* Setup stats when device is created */ |
2595 | static int vxlan_init(struct net_device *dev) | |
2596 | { | |
1c213bd2 | 2597 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2598 | if (!dev->tstats) |
d342894c | 2599 | return -ENOMEM; |
2600 | ||
2601 | return 0; | |
2602 | } | |
2603 | ||
3ad7a4b1 | 2604 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni) |
afbd8bae MR |
2605 | { |
2606 | struct vxlan_fdb *f; | |
2607 | ||
2608 | spin_lock_bh(&vxlan->hash_lock); | |
3ad7a4b1 | 2609 | f = __vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae MR |
2610 | if (f) |
2611 | vxlan_fdb_destroy(vxlan, f); | |
2612 | spin_unlock_bh(&vxlan->hash_lock); | |
2613 | } | |
2614 | ||
ebf4063e SH |
2615 | static void vxlan_uninit(struct net_device *dev) |
2616 | { | |
2617 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 2618 | |
3ad7a4b1 | 2619 | vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni); |
afbd8bae | 2620 | |
ebf4063e SH |
2621 | free_percpu(dev->tstats); |
2622 | } | |
2623 | ||
d342894c | 2624 | /* Start ageing timer and join group when device is brought up */ |
2625 | static int vxlan_open(struct net_device *dev) | |
2626 | { | |
2627 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
205f356d | 2628 | int ret; |
56ef9c90 | 2629 | |
205f356d JB |
2630 | ret = vxlan_sock_add(vxlan); |
2631 | if (ret < 0) | |
2632 | return ret; | |
d342894c | 2633 | |
79d4a94f | 2634 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 | 2635 | ret = vxlan_igmp_join(vxlan); |
bef0057b MRL |
2636 | if (ret == -EADDRINUSE) |
2637 | ret = 0; | |
56ef9c90 | 2638 | if (ret) { |
205f356d | 2639 | vxlan_sock_release(vxlan); |
56ef9c90 MRL |
2640 | return ret; |
2641 | } | |
d342894c | 2642 | } |
2643 | ||
0dfbdf41 | 2644 | if (vxlan->cfg.age_interval) |
d342894c | 2645 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
2646 | ||
56ef9c90 | 2647 | return ret; |
d342894c | 2648 | } |
2649 | ||
2650 | /* Purge the forwarding table */ | |
8b3f9337 | 2651 | static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all) |
d342894c | 2652 | { |
31fec5aa | 2653 | unsigned int h; |
d342894c | 2654 | |
2655 | spin_lock_bh(&vxlan->hash_lock); | |
2656 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2657 | struct hlist_node *p, *n; | |
2658 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2659 | struct vxlan_fdb *f | |
2660 | = container_of(p, struct vxlan_fdb, hlist); | |
8b3f9337 RP |
2661 | if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP))) |
2662 | continue; | |
afbd8bae MR |
2663 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2664 | if (!is_zero_ether_addr(f->eth_addr)) | |
2665 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2666 | } |
2667 | } | |
2668 | spin_unlock_bh(&vxlan->hash_lock); | |
2669 | } | |
2670 | ||
2671 | /* Cleanup timer and forwarding table on shutdown */ | |
2672 | static int vxlan_stop(struct net_device *dev) | |
2673 | { | |
2674 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2675 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
56ef9c90 | 2676 | int ret = 0; |
d342894c | 2677 | |
24c0e683 | 2678 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 2679 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 2680 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 2681 | |
2682 | del_timer_sync(&vxlan->age_timer); | |
2683 | ||
8b3f9337 | 2684 | vxlan_flush(vxlan, false); |
205f356d | 2685 | vxlan_sock_release(vxlan); |
d342894c | 2686 | |
56ef9c90 | 2687 | return ret; |
d342894c | 2688 | } |
2689 | ||
d342894c | 2690 | /* Stub, nothing needs to be done. */ |
2691 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2692 | { | |
2693 | } | |
2694 | ||
91572088 | 2695 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
345010b5 | 2696 | { |
91572088 JW |
2697 | struct vxlan_dev *vxlan = netdev_priv(dev); |
2698 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2699 | struct net_device *lowerdev = __dev_get_by_index(vxlan->net, | |
2700 | dst->remote_ifindex); | |
ce44a4ae | 2701 | bool use_ipv6 = !!(vxlan->cfg.flags & VXLAN_F_IPV6); |
345010b5 | 2702 | |
91572088 JW |
2703 | /* This check is different than dev->max_mtu, because it looks at |
2704 | * the lowerdev->mtu, rather than the static dev->max_mtu | |
2705 | */ | |
2706 | if (lowerdev) { | |
2707 | int max_mtu = lowerdev->mtu - | |
2708 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); | |
2709 | if (new_mtu > max_mtu) | |
72564b59 | 2710 | return -EINVAL; |
72564b59 DW |
2711 | } |
2712 | ||
345010b5 DB |
2713 | dev->mtu = new_mtu; |
2714 | return 0; | |
2715 | } | |
2716 | ||
fc4099f1 PS |
2717 | static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
2718 | { | |
2719 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2720 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
2721 | __be16 sport, dport; | |
2722 | ||
2723 | sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, | |
2724 | vxlan->cfg.port_max, true); | |
2725 | dport = info->key.tp_dst ? : vxlan->cfg.dst_port; | |
2726 | ||
239e944f | 2727 | if (ip_tunnel_info_af(info) == AF_INET) { |
c6fcc4fc | 2728 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
1a8496ba JB |
2729 | struct rtable *rt; |
2730 | ||
655c3de1 | 2731 | rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos, |
1a8496ba | 2732 | info->key.u.ipv4.dst, |
22f0708a PA |
2733 | &info->key.u.ipv4.src, dport, sport, |
2734 | &info->dst_cache, info); | |
1a8496ba JB |
2735 | if (IS_ERR(rt)) |
2736 | return PTR_ERR(rt); | |
2737 | ip_rt_put(rt); | |
239e944f JB |
2738 | } else { |
2739 | #if IS_ENABLED(CONFIG_IPV6) | |
03dc52a8 | 2740 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
239e944f JB |
2741 | struct dst_entry *ndst; |
2742 | ||
655c3de1 | 2743 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos, |
e7f70af1 | 2744 | info->key.label, &info->key.u.ipv6.dst, |
22f0708a PA |
2745 | &info->key.u.ipv6.src, dport, sport, |
2746 | &info->dst_cache, info); | |
239e944f JB |
2747 | if (IS_ERR(ndst)) |
2748 | return PTR_ERR(ndst); | |
2749 | dst_release(ndst); | |
239e944f JB |
2750 | #else /* !CONFIG_IPV6 */ |
2751 | return -EPFNOSUPPORT; | |
2752 | #endif | |
2753 | } | |
1a8496ba JB |
2754 | info->key.tp_src = sport; |
2755 | info->key.tp_dst = dport; | |
239e944f | 2756 | return 0; |
fc4099f1 PS |
2757 | } |
2758 | ||
0c867c9b | 2759 | static const struct net_device_ops vxlan_netdev_ether_ops = { |
d342894c | 2760 | .ndo_init = vxlan_init, |
ebf4063e | 2761 | .ndo_uninit = vxlan_uninit, |
d342894c | 2762 | .ndo_open = vxlan_open, |
2763 | .ndo_stop = vxlan_stop, | |
2764 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2765 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2766 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2767 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2768 | .ndo_validate_addr = eth_validate_addr, |
2769 | .ndo_set_mac_address = eth_mac_addr, | |
2770 | .ndo_fdb_add = vxlan_fdb_add, | |
2771 | .ndo_fdb_del = vxlan_fdb_delete, | |
2772 | .ndo_fdb_dump = vxlan_fdb_dump, | |
fc4099f1 | 2773 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
d342894c | 2774 | }; |
2775 | ||
e1e5314d JB |
2776 | static const struct net_device_ops vxlan_netdev_raw_ops = { |
2777 | .ndo_init = vxlan_init, | |
2778 | .ndo_uninit = vxlan_uninit, | |
2779 | .ndo_open = vxlan_open, | |
2780 | .ndo_stop = vxlan_stop, | |
2781 | .ndo_start_xmit = vxlan_xmit, | |
2782 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
2783 | .ndo_change_mtu = vxlan_change_mtu, | |
2784 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, | |
2785 | }; | |
2786 | ||
d342894c | 2787 | /* Info for udev, that this is a virtual tunnel endpoint */ |
2788 | static struct device_type vxlan_type = { | |
2789 | .name = "vxlan", | |
2790 | }; | |
2791 | ||
e5de25dc | 2792 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
35e42379 | 2793 | * supply the listening VXLAN udp ports. Callers are expected |
e5de25dc | 2794 | * to implement the ndo_udp_tunnel_add. |
53cf5275 | 2795 | */ |
b7aade15 | 2796 | static void vxlan_push_rx_ports(struct net_device *dev) |
53cf5275 JG |
2797 | { |
2798 | struct vxlan_sock *vs; | |
2799 | struct net *net = dev_net(dev); | |
2800 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
35e42379 | 2801 | unsigned int i; |
53cf5275 JG |
2802 | |
2803 | spin_lock(&vn->sock_lock); | |
2804 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
e7b3db5e AD |
2805 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) |
2806 | udp_tunnel_push_rx_port(dev, vs->sock, | |
b9adcd69 AD |
2807 | (vs->flags & VXLAN_F_GPE) ? |
2808 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 2809 | UDP_TUNNEL_TYPE_VXLAN); |
53cf5275 JG |
2810 | } |
2811 | spin_unlock(&vn->sock_lock); | |
2812 | } | |
53cf5275 | 2813 | |
d342894c | 2814 | /* Initialize the device structure. */ |
2815 | static void vxlan_setup(struct net_device *dev) | |
2816 | { | |
2817 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2818 | unsigned int h; |
d342894c | 2819 | |
65226ef8 JB |
2820 | eth_hw_addr_random(dev); |
2821 | ether_setup(dev); | |
2822 | ||
cf124db5 | 2823 | dev->needs_free_netdev = true; |
d342894c | 2824 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2825 | ||
d342894c | 2826 | dev->features |= NETIF_F_LLTX; |
d6727fe3 | 2827 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2828 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2829 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2830 | |
1eaa8178 | 2831 | dev->vlan_features = dev->features; |
0afb1666 | 2832 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2833 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
02875878 | 2834 | netif_keep_dst(dev); |
0c867c9b | 2835 | dev->priv_flags |= IFF_NO_QUEUE; |
d342894c | 2836 | |
a985343b MS |
2837 | /* MTU range: 68 - 65535 */ |
2838 | dev->min_mtu = ETH_MIN_MTU; | |
2839 | dev->max_mtu = ETH_MAX_MTU; | |
2840 | ||
553675fb | 2841 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2842 | spin_lock_init(&vxlan->hash_lock); |
2843 | ||
2844 | init_timer_deferrable(&vxlan->age_timer); | |
2845 | vxlan->age_timer.function = vxlan_cleanup; | |
2846 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2847 | ||
2848 | vxlan->dev = dev; | |
2849 | ||
58ce31cc TH |
2850 | gro_cells_init(&vxlan->gro_cells, dev); |
2851 | ||
d342894c | 2852 | for (h = 0; h < FDB_HASH_SIZE; ++h) |
2853 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
11cd9476 JV |
2854 | |
2855 | INIT_LIST_HEAD(&vxlan->fan.fan_maps); | |
d342894c | 2856 | } |
2857 | ||
0c867c9b JB |
2858 | static void vxlan_ether_setup(struct net_device *dev) |
2859 | { | |
0c867c9b JB |
2860 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
2861 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
2862 | dev->netdev_ops = &vxlan_netdev_ether_ops; | |
2863 | } | |
2864 | ||
e1e5314d JB |
2865 | static void vxlan_raw_setup(struct net_device *dev) |
2866 | { | |
65226ef8 | 2867 | dev->header_ops = NULL; |
e1e5314d JB |
2868 | dev->type = ARPHRD_NONE; |
2869 | dev->hard_header_len = 0; | |
2870 | dev->addr_len = 0; | |
e1e5314d JB |
2871 | dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; |
2872 | dev->netdev_ops = &vxlan_netdev_raw_ops; | |
2873 | } | |
2874 | ||
d342894c | 2875 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { |
2876 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2877 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2878 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2879 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2880 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2881 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2882 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2883 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
e7f70af1 | 2884 | [IFLA_VXLAN_LABEL] = { .type = NLA_U32 }, |
d342894c | 2885 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, |
2886 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2887 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2888 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2889 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2890 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2891 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2892 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
f8a9b1bc | 2893 | [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
823aa873 | 2894 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
2895 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
2896 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
2897 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
2898 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
2899 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 2900 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
e1e5314d | 2901 | [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, }, |
0ace2ca8 | 2902 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
d342894c | 2903 | }; |
2904 | ||
a8b8a889 MS |
2905 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[], |
2906 | struct netlink_ext_ack *extack) | |
d342894c | 2907 | { |
2908 | if (tb[IFLA_ADDRESS]) { | |
2909 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2910 | pr_debug("invalid link address (not ethernet)\n"); | |
2911 | return -EINVAL; | |
2912 | } | |
2913 | ||
2914 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2915 | pr_debug("invalid all zero ethernet address\n"); | |
2916 | return -EADDRNOTAVAIL; | |
2917 | } | |
2918 | } | |
2919 | ||
a985343b | 2920 | if (tb[IFLA_MTU]) { |
019b13ae | 2921 | u32 mtu = nla_get_u32(tb[IFLA_MTU]); |
a985343b MS |
2922 | |
2923 | if (mtu < ETH_MIN_MTU || mtu > ETH_MAX_MTU) | |
2924 | return -EINVAL; | |
2925 | } | |
2926 | ||
d342894c | 2927 | if (!data) |
2928 | return -EINVAL; | |
2929 | ||
2930 | if (data[IFLA_VXLAN_ID]) { | |
a985343b MS |
2931 | u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); |
2932 | ||
4e37d691 | 2933 | if (id >= VXLAN_N_VID) |
d342894c | 2934 | return -ERANGE; |
2935 | } | |
2936 | ||
05f47d69 | 2937 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2938 | const struct ifla_vxlan_port_range *p | |
2939 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2940 | ||
2941 | if (ntohs(p->high) < ntohs(p->low)) { | |
2942 | pr_debug("port range %u .. %u not valid\n", | |
2943 | ntohs(p->low), ntohs(p->high)); | |
2944 | return -EINVAL; | |
2945 | } | |
2946 | } | |
2947 | ||
d342894c | 2948 | return 0; |
2949 | } | |
2950 | ||
1b13c97f YB |
2951 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2952 | struct ethtool_drvinfo *drvinfo) | |
2953 | { | |
2954 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2955 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2956 | } | |
2957 | ||
2958 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2959 | .get_drvinfo = vxlan_get_drvinfo, | |
2960 | .get_link = ethtool_op_get_link, | |
2961 | }; | |
2962 | ||
3ee64f39 TH |
2963 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2964 | __be16 port, u32 flags) | |
553675fb | 2965 | { |
e4c7ed41 | 2966 | struct socket *sock; |
3ee64f39 TH |
2967 | struct udp_port_cfg udp_conf; |
2968 | int err; | |
e4c7ed41 | 2969 | |
3ee64f39 | 2970 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2971 | |
3ee64f39 TH |
2972 | if (ipv6) { |
2973 | udp_conf.family = AF_INET6; | |
3ee64f39 | 2974 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 2975 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
a43a9ef6 | 2976 | udp_conf.ipv6_v6only = 1; |
3ee64f39 TH |
2977 | } else { |
2978 | udp_conf.family = AF_INET; | |
e4c7ed41 | 2979 | } |
e4c7ed41 | 2980 | |
3ee64f39 | 2981 | udp_conf.local_udp_port = port; |
553675fb | 2982 | |
3ee64f39 TH |
2983 | /* Open UDP socket */ |
2984 | err = udp_sock_create(net, &udp_conf, &sock); | |
2985 | if (err < 0) | |
2986 | return ERR_PTR(err); | |
e4c7ed41 | 2987 | |
39deb2c7 | 2988 | return sock; |
e4c7ed41 CW |
2989 | } |
2990 | ||
2991 | /* Create new listen socket if needed */ | |
b1be00a6 JB |
2992 | static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6, |
2993 | __be16 port, u32 flags) | |
e4c7ed41 CW |
2994 | { |
2995 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2996 | struct vxlan_sock *vs; | |
2997 | struct socket *sock; | |
e4c7ed41 | 2998 | unsigned int h; |
acbf74a7 | 2999 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 3000 | |
dc01e7d3 | 3001 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
3002 | if (!vs) |
3003 | return ERR_PTR(-ENOMEM); | |
3004 | ||
3005 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
3006 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
3007 | ||
3ee64f39 | 3008 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 3009 | if (IS_ERR(sock)) { |
553675fb | 3010 | kfree(vs); |
e50fddc8 | 3011 | return ERR_CAST(sock); |
553675fb | 3012 | } |
e4c7ed41 CW |
3013 | |
3014 | vs->sock = sock; | |
66af846f | 3015 | refcount_set(&vs->refcnt, 1); |
af33c1ad | 3016 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 3017 | |
9c2e24e1 PS |
3018 | spin_lock(&vn->sock_lock); |
3019 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
e7b3db5e | 3020 | udp_tunnel_notify_add_rx_port(sock, |
b9adcd69 AD |
3021 | (vs->flags & VXLAN_F_GPE) ? |
3022 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 3023 | UDP_TUNNEL_TYPE_VXLAN); |
9c2e24e1 | 3024 | spin_unlock(&vn->sock_lock); |
553675fb | 3025 | |
3026 | /* Mark socket as an encapsulation socket. */ | |
5602c48c | 3027 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
acbf74a7 AZ |
3028 | tunnel_cfg.sk_user_data = vs; |
3029 | tunnel_cfg.encap_type = 1; | |
f2d1968e | 3030 | tunnel_cfg.encap_rcv = vxlan_rcv; |
acbf74a7 | 3031 | tunnel_cfg.encap_destroy = NULL; |
5602c48c TH |
3032 | tunnel_cfg.gro_receive = vxlan_gro_receive; |
3033 | tunnel_cfg.gro_complete = vxlan_gro_complete; | |
acbf74a7 AZ |
3034 | |
3035 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 3036 | |
9c2e24e1 PS |
3037 | return vs; |
3038 | } | |
3039 | ||
b1be00a6 | 3040 | static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6) |
9c2e24e1 | 3041 | { |
205f356d JB |
3042 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
3043 | struct vxlan_sock *vs = NULL; | |
69e76661 | 3044 | struct vxlan_dev_node *node; |
9c2e24e1 | 3045 | |
205f356d | 3046 | if (!vxlan->cfg.no_share) { |
56ef9c90 | 3047 | spin_lock(&vn->sock_lock); |
205f356d | 3048 | vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
dc5321d7 | 3049 | vxlan->cfg.dst_port, vxlan->cfg.flags); |
66af846f | 3050 | if (vs && !refcount_inc_not_zero(&vs->refcnt)) { |
56ef9c90 | 3051 | spin_unlock(&vn->sock_lock); |
205f356d | 3052 | return -EBUSY; |
56ef9c90 MRL |
3053 | } |
3054 | spin_unlock(&vn->sock_lock); | |
3055 | } | |
205f356d | 3056 | if (!vs) |
b1be00a6 | 3057 | vs = vxlan_socket_create(vxlan->net, ipv6, |
dc5321d7 | 3058 | vxlan->cfg.dst_port, vxlan->cfg.flags); |
205f356d JB |
3059 | if (IS_ERR(vs)) |
3060 | return PTR_ERR(vs); | |
b1be00a6 | 3061 | #if IS_ENABLED(CONFIG_IPV6) |
69e76661 | 3062 | if (ipv6) { |
c6fcc4fc | 3063 | rcu_assign_pointer(vxlan->vn6_sock, vs); |
69e76661 JB |
3064 | node = &vxlan->hlist6; |
3065 | } else | |
b1be00a6 | 3066 | #endif |
69e76661 | 3067 | { |
c6fcc4fc | 3068 | rcu_assign_pointer(vxlan->vn4_sock, vs); |
69e76661 JB |
3069 | node = &vxlan->hlist4; |
3070 | } | |
3071 | vxlan_vs_add_dev(vs, vxlan, node); | |
205f356d | 3072 | return 0; |
553675fb | 3073 | } |
3074 | ||
b1be00a6 JB |
3075 | static int vxlan_sock_add(struct vxlan_dev *vxlan) |
3076 | { | |
dc5321d7 MS |
3077 | bool metadata = vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA; |
3078 | bool ipv6 = vxlan->cfg.flags & VXLAN_F_IPV6 || metadata; | |
d074bf96 | 3079 | bool ipv4 = !ipv6 || metadata; |
b1be00a6 JB |
3080 | int ret = 0; |
3081 | ||
c6fcc4fc | 3082 | RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
b1be00a6 | 3083 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 3084 | RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
d074bf96 | 3085 | if (ipv6) { |
b1be00a6 | 3086 | ret = __vxlan_sock_add(vxlan, true); |
d074bf96 JB |
3087 | if (ret < 0 && ret != -EAFNOSUPPORT) |
3088 | ipv4 = false; | |
3089 | } | |
b1be00a6 | 3090 | #endif |
d074bf96 | 3091 | if (ipv4) |
b1be00a6 JB |
3092 | ret = __vxlan_sock_add(vxlan, false); |
3093 | if (ret < 0) | |
3094 | vxlan_sock_release(vxlan); | |
3095 | return ret; | |
3096 | } | |
3097 | ||
a985343b MS |
3098 | static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf, |
3099 | struct net_device **lower, | |
3100 | struct vxlan_dev *old) | |
d342894c | 3101 | { |
33564bbb | 3102 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
a985343b | 3103 | struct vxlan_dev *tmp; |
e4c7ed41 | 3104 | bool use_ipv6 = false; |
d342894c | 3105 | |
a985343b MS |
3106 | if (conf->flags & VXLAN_F_GPE) { |
3107 | /* For now, allow GPE only together with | |
3108 | * COLLECT_METADATA. This can be relaxed later; in such | |
3109 | * case, the other side of the PtP link will have to be | |
3110 | * provided. | |
3111 | */ | |
3112 | if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) || | |
3113 | !(conf->flags & VXLAN_F_COLLECT_METADATA)) { | |
3114 | return -EINVAL; | |
3555621d | 3115 | } |
e1e5314d | 3116 | } |
0c867c9b | 3117 | |
ce44a4ae MS |
3118 | if (!conf->remote_ip.sa.sa_family && !conf->saddr.sa.sa_family) { |
3119 | /* Unless IPv6 is explicitly requested, assume IPv4 */ | |
a985343b | 3120 | conf->remote_ip.sa.sa_family = AF_INET; |
ce44a4ae MS |
3121 | conf->saddr.sa.sa_family = AF_INET; |
3122 | } else if (!conf->remote_ip.sa.sa_family) { | |
3123 | conf->remote_ip.sa.sa_family = conf->saddr.sa.sa_family; | |
3124 | } else if (!conf->saddr.sa.sa_family) { | |
3125 | conf->saddr.sa.sa_family = conf->remote_ip.sa.sa_family; | |
3126 | } | |
3127 | ||
3128 | if (conf->saddr.sa.sa_family != conf->remote_ip.sa.sa_family) | |
3129 | return -EINVAL; | |
e4c7ed41 | 3130 | |
0f22a3c6 MS |
3131 | if (vxlan_addr_multicast(&conf->saddr)) |
3132 | return -EINVAL; | |
3133 | ||
ce44a4ae | 3134 | if (conf->saddr.sa.sa_family == AF_INET6) { |
057ba29b JB |
3135 | if (!IS_ENABLED(CONFIG_IPV6)) |
3136 | return -EPFNOSUPPORT; | |
e4c7ed41 | 3137 | use_ipv6 = true; |
a985343b | 3138 | conf->flags |= VXLAN_F_IPV6; |
0f22a3c6 MS |
3139 | |
3140 | if (!(conf->flags & VXLAN_F_COLLECT_METADATA)) { | |
3141 | int local_type = | |
3142 | ipv6_addr_type(&conf->saddr.sin6.sin6_addr); | |
3143 | int remote_type = | |
3144 | ipv6_addr_type(&conf->remote_ip.sin6.sin6_addr); | |
3145 | ||
3146 | if (local_type & IPV6_ADDR_LINKLOCAL) { | |
3147 | if (!(remote_type & IPV6_ADDR_LINKLOCAL) && | |
3148 | (remote_type != IPV6_ADDR_ANY)) | |
3149 | return -EINVAL; | |
3150 | ||
3151 | conf->flags |= VXLAN_F_IPV6_LINKLOCAL; | |
3152 | } else { | |
3153 | if (remote_type == | |
3154 | (IPV6_ADDR_UNICAST | IPV6_ADDR_LINKLOCAL)) | |
3155 | return -EINVAL; | |
3156 | ||
3157 | conf->flags &= ~VXLAN_F_IPV6_LINKLOCAL; | |
3158 | } | |
3159 | } | |
057ba29b | 3160 | } |
d342894c | 3161 | |
a985343b | 3162 | if (conf->label && !use_ipv6) |
e7f70af1 | 3163 | return -EINVAL; |
e7f70af1 | 3164 | |
a985343b MS |
3165 | if (conf->remote_ifindex) { |
3166 | struct net_device *lowerdev; | |
34e02aa1 | 3167 | |
a985343b MS |
3168 | lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex); |
3169 | if (!lowerdev) | |
34e02aa1 | 3170 | return -ENODEV; |
d342894c | 3171 | |
e4c7ed41 CW |
3172 | #if IS_ENABLED(CONFIG_IPV6) |
3173 | if (use_ipv6) { | |
3174 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
a985343b | 3175 | if (idev && idev->cnf.disable_ipv6) |
e4c7ed41 | 3176 | return -EPERM; |
e4c7ed41 CW |
3177 | } |
3178 | #endif | |
3179 | ||
a985343b MS |
3180 | *lower = lowerdev; |
3181 | } else { | |
3182 | if (vxlan_addr_multicast(&conf->remote_ip)) | |
3183 | return -EINVAL; | |
1ba56fb4 | 3184 | |
0f22a3c6 MS |
3185 | #if IS_ENABLED(CONFIG_IPV6) |
3186 | if (conf->flags & VXLAN_F_IPV6_LINKLOCAL) | |
3187 | return -EINVAL; | |
3188 | #endif | |
3189 | ||
a985343b | 3190 | *lower = NULL; |
9dc2ad10 | 3191 | } |
d342894c | 3192 | |
a985343b MS |
3193 | if (!conf->dst_port) { |
3194 | if (conf->flags & VXLAN_F_GPE) | |
3195 | conf->dst_port = htons(4790); /* IANA VXLAN-GPE port */ | |
3196 | else | |
3197 | conf->dst_port = htons(vxlan_port); | |
d6acfeb1 FM |
3198 | } |
3199 | ||
a985343b MS |
3200 | if (!conf->age_interval) |
3201 | conf->age_interval = FDB_AGE_DEFAULT; | |
91572088 | 3202 | |
a985343b MS |
3203 | list_for_each_entry(tmp, &vn->vxlan_list, next) { |
3204 | if (tmp == old) | |
3205 | continue; | |
91572088 | 3206 | |
49f810f0 MS |
3207 | if (tmp->cfg.vni != conf->vni) |
3208 | continue; | |
3209 | if (tmp->cfg.dst_port != conf->dst_port) | |
3210 | continue; | |
3211 | if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) != | |
ce44a4ae | 3212 | (conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6))) |
49f810f0 MS |
3213 | continue; |
3214 | ||
3215 | if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) && | |
3216 | tmp->cfg.remote_ifindex != conf->remote_ifindex) | |
3217 | continue; | |
3218 | ||
3219 | return -EEXIST; | |
a985343b | 3220 | } |
91572088 | 3221 | |
a985343b MS |
3222 | return 0; |
3223 | } | |
3224 | ||
3225 | static void vxlan_config_apply(struct net_device *dev, | |
3226 | struct vxlan_config *conf, | |
889ce937 SD |
3227 | struct net_device *lowerdev, |
3228 | struct net *src_net, | |
3229 | bool changelink) | |
a985343b MS |
3230 | { |
3231 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3232 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3233 | unsigned short needed_headroom = ETH_HLEN; | |
3234 | bool use_ipv6 = !!(conf->flags & VXLAN_F_IPV6); | |
3235 | int max_mtu = ETH_MAX_MTU; | |
3236 | ||
3237 | if (!changelink) { | |
3238 | if (conf->flags & VXLAN_F_GPE) | |
3239 | vxlan_raw_setup(dev); | |
3240 | else | |
3241 | vxlan_ether_setup(dev); | |
3242 | ||
3243 | if (conf->mtu) | |
3244 | dev->mtu = conf->mtu; | |
889ce937 SD |
3245 | |
3246 | vxlan->net = src_net; | |
a985343b MS |
3247 | } |
3248 | ||
3249 | dst->remote_vni = conf->vni; | |
3250 | ||
3251 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); | |
3252 | ||
3253 | if (lowerdev) { | |
3254 | dst->remote_ifindex = conf->remote_ifindex; | |
3255 | ||
3256 | dev->gso_max_size = lowerdev->gso_max_size; | |
3257 | dev->gso_max_segs = lowerdev->gso_max_segs; | |
91572088 | 3258 | |
a985343b | 3259 | needed_headroom = lowerdev->hard_header_len; |
91572088 | 3260 | |
a985343b MS |
3261 | max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : |
3262 | VXLAN_HEADROOM); | |
7e059158 DW |
3263 | } |
3264 | ||
a985343b MS |
3265 | if (dev->mtu > max_mtu) |
3266 | dev->mtu = max_mtu; | |
3267 | ||
b1be00a6 JB |
3268 | if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) |
3269 | needed_headroom += VXLAN6_HEADROOM; | |
3270 | else | |
3271 | needed_headroom += VXLAN_HEADROOM; | |
3272 | dev->needed_headroom = needed_headroom; | |
3273 | ||
0dfbdf41 | 3274 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
a985343b | 3275 | } |
0dfbdf41 | 3276 | |
a985343b MS |
3277 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
3278 | struct vxlan_config *conf, | |
3279 | bool changelink) | |
3280 | { | |
3281 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3282 | struct net_device *lowerdev; | |
3283 | int ret; | |
0dfbdf41 | 3284 | |
a985343b MS |
3285 | ret = vxlan_config_validate(src_net, conf, &lowerdev, vxlan); |
3286 | if (ret) | |
3287 | return ret; | |
8bcdc4f3 | 3288 | |
889ce937 | 3289 | vxlan_config_apply(dev, conf, lowerdev, src_net, changelink); |
0dfbdf41 | 3290 | |
0dfbdf41 TG |
3291 | return 0; |
3292 | } | |
3293 | ||
c80498e3 ND |
3294 | static int __vxlan_dev_create(struct net *net, struct net_device *dev, |
3295 | struct vxlan_config *conf) | |
3296 | { | |
3297 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3298 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3299 | int err; | |
3300 | ||
3301 | err = vxlan_dev_configure(net, dev, conf, false); | |
3302 | if (err) | |
3303 | return err; | |
3304 | ||
3305 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
3306 | ||
3307 | /* create an fdb entry for a valid default destination */ | |
3308 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
3309 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
3310 | &vxlan->default_dst.remote_ip, | |
3311 | NUD_REACHABLE | NUD_PERMANENT, | |
3312 | NLM_F_EXCL | NLM_F_CREATE, | |
3313 | vxlan->cfg.dst_port, | |
3314 | vxlan->default_dst.remote_vni, | |
3315 | vxlan->default_dst.remote_vni, | |
3316 | vxlan->default_dst.remote_ifindex, | |
3317 | NTF_SELF); | |
3318 | if (err) | |
3319 | return err; | |
3320 | } | |
3321 | ||
3322 | err = register_netdevice(dev); | |
3323 | if (err) { | |
3324 | vxlan_fdb_delete_default(vxlan, vxlan->default_dst.remote_vni); | |
3325 | return err; | |
3326 | } | |
3327 | ||
3328 | list_add(&vxlan->next, &vn->vxlan_list); | |
3329 | return 0; | |
3330 | } | |
3331 | ||
8bcdc4f3 RP |
3332 | static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[], |
3333 | struct net_device *dev, struct vxlan_config *conf, | |
3334 | bool changelink) | |
0dfbdf41 | 3335 | { |
8bcdc4f3 | 3336 | struct vxlan_dev *vxlan = netdev_priv(dev); |
11cd9476 | 3337 | int err; |
0dfbdf41 | 3338 | |
8bcdc4f3 | 3339 | memset(conf, 0, sizeof(*conf)); |
e277de5f | 3340 | |
8bcdc4f3 RP |
3341 | /* if changelink operation, start with old existing cfg */ |
3342 | if (changelink) | |
3343 | memcpy(conf, &vxlan->cfg, sizeof(*conf)); | |
3344 | ||
3345 | if (data[IFLA_VXLAN_ID]) { | |
3346 | __be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); | |
3347 | ||
3348 | if (changelink && (vni != conf->vni)) | |
3349 | return -EOPNOTSUPP; | |
3350 | conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); | |
3351 | } | |
0dfbdf41 TG |
3352 | |
3353 | if (data[IFLA_VXLAN_GROUP]) { | |
ce44a4ae MS |
3354 | if (changelink && (conf->remote_ip.sa.sa_family != AF_INET)) |
3355 | return -EOPNOTSUPP; | |
3356 | ||
8bcdc4f3 | 3357 | conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); |
ce44a4ae | 3358 | conf->remote_ip.sa.sa_family = AF_INET; |
0dfbdf41 TG |
3359 | } else if (data[IFLA_VXLAN_GROUP6]) { |
3360 | if (!IS_ENABLED(CONFIG_IPV6)) | |
3361 | return -EPFNOSUPPORT; | |
3362 | ||
ce44a4ae MS |
3363 | if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6)) |
3364 | return -EOPNOTSUPP; | |
3365 | ||
8bcdc4f3 RP |
3366 | conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); |
3367 | conf->remote_ip.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
3368 | } |
3369 | ||
11cd9476 JV |
3370 | if (data[IFLA_VXLAN_FAN_MAP]) { |
3371 | err = vxlan_parse_fan_map(data, vxlan); | |
3372 | if (err) | |
3373 | return err; | |
3374 | } | |
3375 | ||
0dfbdf41 | 3376 | if (data[IFLA_VXLAN_LOCAL]) { |
ce44a4ae MS |
3377 | if (changelink && (conf->saddr.sa.sa_family != AF_INET)) |
3378 | return -EOPNOTSUPP; | |
3379 | ||
8bcdc4f3 RP |
3380 | conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); |
3381 | conf->saddr.sa.sa_family = AF_INET; | |
0dfbdf41 TG |
3382 | } else if (data[IFLA_VXLAN_LOCAL6]) { |
3383 | if (!IS_ENABLED(CONFIG_IPV6)) | |
3384 | return -EPFNOSUPPORT; | |
3385 | ||
ce44a4ae MS |
3386 | if (changelink && (conf->saddr.sa.sa_family != AF_INET6)) |
3387 | return -EOPNOTSUPP; | |
3388 | ||
0dfbdf41 | 3389 | /* TODO: respect scope id */ |
8bcdc4f3 RP |
3390 | conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); |
3391 | conf->saddr.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
3392 | } |
3393 | ||
3394 | if (data[IFLA_VXLAN_LINK]) | |
8bcdc4f3 | 3395 | conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); |
0dfbdf41 | 3396 | |
d342894c | 3397 | if (data[IFLA_VXLAN_TOS]) |
8bcdc4f3 | 3398 | conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 3399 | |
afb97186 | 3400 | if (data[IFLA_VXLAN_TTL]) |
8bcdc4f3 | 3401 | conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 3402 | |
e7f70af1 | 3403 | if (data[IFLA_VXLAN_LABEL]) |
8bcdc4f3 | 3404 | conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) & |
e7f70af1 DB |
3405 | IPV6_FLOWLABEL_MASK; |
3406 | ||
8bcdc4f3 | 3407 | if (data[IFLA_VXLAN_LEARNING]) { |
dc5321d7 | 3408 | if (nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
8bcdc4f3 | 3409 | conf->flags |= VXLAN_F_LEARN; |
dc5321d7 | 3410 | else |
8bcdc4f3 | 3411 | conf->flags &= ~VXLAN_F_LEARN; |
8bcdc4f3 RP |
3412 | } else if (!changelink) { |
3413 | /* default to learn on a new device */ | |
3414 | conf->flags |= VXLAN_F_LEARN; | |
3415 | } | |
d342894c | 3416 | |
8bcdc4f3 RP |
3417 | if (data[IFLA_VXLAN_AGEING]) { |
3418 | if (changelink) | |
3419 | return -EOPNOTSUPP; | |
3420 | conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
3421 | } | |
d342894c | 3422 | |
8bcdc4f3 RP |
3423 | if (data[IFLA_VXLAN_PROXY]) { |
3424 | if (changelink) | |
3425 | return -EOPNOTSUPP; | |
3426 | if (nla_get_u8(data[IFLA_VXLAN_PROXY])) | |
3427 | conf->flags |= VXLAN_F_PROXY; | |
3428 | } | |
e4f67add | 3429 | |
8bcdc4f3 RP |
3430 | if (data[IFLA_VXLAN_RSC]) { |
3431 | if (changelink) | |
3432 | return -EOPNOTSUPP; | |
3433 | if (nla_get_u8(data[IFLA_VXLAN_RSC])) | |
3434 | conf->flags |= VXLAN_F_RSC; | |
3435 | } | |
e4f67add | 3436 | |
8bcdc4f3 RP |
3437 | if (data[IFLA_VXLAN_L2MISS]) { |
3438 | if (changelink) | |
3439 | return -EOPNOTSUPP; | |
3440 | if (nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
3441 | conf->flags |= VXLAN_F_L2MISS; | |
3442 | } | |
e4f67add | 3443 | |
8bcdc4f3 RP |
3444 | if (data[IFLA_VXLAN_L3MISS]) { |
3445 | if (changelink) | |
3446 | return -EOPNOTSUPP; | |
3447 | if (nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
3448 | conf->flags |= VXLAN_F_L3MISS; | |
3449 | } | |
e4f67add | 3450 | |
8bcdc4f3 RP |
3451 | if (data[IFLA_VXLAN_LIMIT]) { |
3452 | if (changelink) | |
3453 | return -EOPNOTSUPP; | |
3454 | conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
3455 | } | |
d342894c | 3456 | |
8bcdc4f3 RP |
3457 | if (data[IFLA_VXLAN_COLLECT_METADATA]) { |
3458 | if (changelink) | |
3459 | return -EOPNOTSUPP; | |
3460 | if (nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA])) | |
3461 | conf->flags |= VXLAN_F_COLLECT_METADATA; | |
3462 | } | |
f8a9b1bc | 3463 | |
05f47d69 | 3464 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
8bcdc4f3 RP |
3465 | if (!changelink) { |
3466 | const struct ifla_vxlan_port_range *p | |
3467 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
3468 | conf->port_min = ntohs(p->low); | |
3469 | conf->port_max = ntohs(p->high); | |
3470 | } else { | |
3471 | return -EOPNOTSUPP; | |
3472 | } | |
05f47d69 | 3473 | } |
3474 | ||
8bcdc4f3 RP |
3475 | if (data[IFLA_VXLAN_PORT]) { |
3476 | if (changelink) | |
3477 | return -EOPNOTSUPP; | |
3478 | conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
3479 | } | |
823aa873 | 3480 | |
8bcdc4f3 RP |
3481 | if (data[IFLA_VXLAN_UDP_CSUM]) { |
3482 | if (changelink) | |
3483 | return -EOPNOTSUPP; | |
3484 | if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) | |
3485 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX; | |
3486 | } | |
359a0ea9 | 3487 | |
8bcdc4f3 RP |
3488 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) { |
3489 | if (changelink) | |
3490 | return -EOPNOTSUPP; | |
3491 | if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
3492 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; | |
3493 | } | |
359a0ea9 | 3494 | |
8bcdc4f3 RP |
3495 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) { |
3496 | if (changelink) | |
3497 | return -EOPNOTSUPP; | |
3498 | if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
3499 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; | |
3500 | } | |
359a0ea9 | 3501 | |
8bcdc4f3 RP |
3502 | if (data[IFLA_VXLAN_REMCSUM_TX]) { |
3503 | if (changelink) | |
3504 | return -EOPNOTSUPP; | |
3505 | if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
3506 | conf->flags |= VXLAN_F_REMCSUM_TX; | |
3507 | } | |
dfd8645e | 3508 | |
8bcdc4f3 RP |
3509 | if (data[IFLA_VXLAN_REMCSUM_RX]) { |
3510 | if (changelink) | |
3511 | return -EOPNOTSUPP; | |
3512 | if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
3513 | conf->flags |= VXLAN_F_REMCSUM_RX; | |
3514 | } | |
3515 | ||
3516 | if (data[IFLA_VXLAN_GBP]) { | |
3517 | if (changelink) | |
3518 | return -EOPNOTSUPP; | |
3519 | conf->flags |= VXLAN_F_GBP; | |
3520 | } | |
3521 | ||
3522 | if (data[IFLA_VXLAN_GPE]) { | |
3523 | if (changelink) | |
3524 | return -EOPNOTSUPP; | |
3525 | conf->flags |= VXLAN_F_GPE; | |
3526 | } | |
3527 | ||
3528 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) { | |
3529 | if (changelink) | |
3530 | return -EOPNOTSUPP; | |
3531 | conf->flags |= VXLAN_F_REMCSUM_NOPARTIAL; | |
3532 | } | |
3533 | ||
3534 | if (tb[IFLA_MTU]) { | |
3535 | if (changelink) | |
3536 | return -EOPNOTSUPP; | |
3537 | conf->mtu = nla_get_u32(tb[IFLA_MTU]); | |
3538 | } | |
3539 | ||
3540 | return 0; | |
3541 | } | |
3542 | ||
3543 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
7a3f4a18 MS |
3544 | struct nlattr *tb[], struct nlattr *data[], |
3545 | struct netlink_ext_ack *extack) | |
8bcdc4f3 | 3546 | { |
8bcdc4f3 RP |
3547 | struct vxlan_config conf; |
3548 | int err; | |
3549 | ||
3550 | err = vxlan_nl2conf(tb, data, dev, &conf, false); | |
3551 | if (err) | |
3552 | return err; | |
3553 | ||
c80498e3 | 3554 | return __vxlan_dev_create(src_net, dev, &conf); |
8bcdc4f3 | 3555 | } |
dfd8645e | 3556 | |
8bcdc4f3 | 3557 | static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[], |
ad744b22 MS |
3558 | struct nlattr *data[], |
3559 | struct netlink_ext_ack *extack) | |
8bcdc4f3 RP |
3560 | { |
3561 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3562 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3563 | struct vxlan_rdst old_dst; | |
3564 | struct vxlan_config conf; | |
3565 | int err; | |
3566 | ||
3567 | err = vxlan_nl2conf(tb, data, | |
3568 | dev, &conf, true); | |
3569 | if (err) | |
3570 | return err; | |
3511494c | 3571 | |
8bcdc4f3 | 3572 | memcpy(&old_dst, dst, sizeof(struct vxlan_rdst)); |
e1e5314d | 3573 | |
8bcdc4f3 RP |
3574 | err = vxlan_dev_configure(vxlan->net, dev, &conf, true); |
3575 | if (err) | |
3576 | return err; | |
0ace2ca8 | 3577 | |
8bcdc4f3 RP |
3578 | /* handle default dst entry */ |
3579 | if (!vxlan_addr_equal(&dst->remote_ip, &old_dst.remote_ip)) { | |
3580 | spin_lock_bh(&vxlan->hash_lock); | |
3581 | if (!vxlan_addr_any(&old_dst.remote_ip)) | |
3582 | __vxlan_fdb_delete(vxlan, all_zeros_mac, | |
3583 | old_dst.remote_ip, | |
3584 | vxlan->cfg.dst_port, | |
3585 | old_dst.remote_vni, | |
3586 | old_dst.remote_vni, | |
3587 | old_dst.remote_ifindex, 0); | |
3588 | ||
3589 | if (!vxlan_addr_any(&dst->remote_ip)) { | |
3590 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
3591 | &dst->remote_ip, | |
3592 | NUD_REACHABLE | NUD_PERMANENT, | |
3593 | NLM_F_CREATE | NLM_F_APPEND, | |
3594 | vxlan->cfg.dst_port, | |
3595 | dst->remote_vni, | |
3596 | dst->remote_vni, | |
3597 | dst->remote_ifindex, | |
3598 | NTF_SELF); | |
3599 | if (err) { | |
3600 | spin_unlock_bh(&vxlan->hash_lock); | |
3601 | return err; | |
3602 | } | |
3603 | } | |
3604 | spin_unlock_bh(&vxlan->hash_lock); | |
3605 | } | |
ce577668 | 3606 | |
8bcdc4f3 | 3607 | return 0; |
d342894c | 3608 | } |
3609 | ||
3610 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
3611 | { | |
3612 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3613 | ||
8b3f9337 RP |
3614 | vxlan_flush(vxlan, true); |
3615 | ||
58ce31cc | 3616 | gro_cells_destroy(&vxlan->gro_cells); |
553675fb | 3617 | list_del(&vxlan->next); |
d342894c | 3618 | unregister_netdevice_queue(dev, head); |
3619 | } | |
3620 | ||
3621 | static size_t vxlan_get_size(const struct net_device *dev) | |
3622 | { | |
3623 | ||
3624 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 3625 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 3626 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 3627 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 3628 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
3629 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
e7f70af1 | 3630 | nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */ |
d342894c | 3631 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ |
e4f67add DS |
3632 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
3633 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
3634 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
3635 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
da8b43c0 | 3636 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
d342894c | 3637 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
3638 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 3639 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
3640 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
3641 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
3642 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
3643 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
3644 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
3645 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
11cd9476 | 3646 | nla_total_size(sizeof(struct ip_fan_map) * 256) + |
d342894c | 3647 | 0; |
3648 | } | |
3649 | ||
3650 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
3651 | { | |
3652 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 3653 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 3654 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
3655 | .low = htons(vxlan->cfg.port_min), |
3656 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 3657 | }; |
d342894c | 3658 | |
54bfd872 | 3659 | if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni))) |
d342894c | 3660 | goto nla_put_failure; |
3661 | ||
e4c7ed41 CW |
3662 | if (!vxlan_addr_any(&dst->remote_ip)) { |
3663 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
3664 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
3665 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
3666 | goto nla_put_failure; |
3667 | #if IS_ENABLED(CONFIG_IPV6) | |
3668 | } else { | |
930345ea JB |
3669 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
3670 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
3671 | goto nla_put_failure; |
3672 | #endif | |
3673 | } | |
3674 | } | |
d342894c | 3675 | |
c7995c43 | 3676 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 3677 | goto nla_put_failure; |
3678 | ||
0dfbdf41 TG |
3679 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
3680 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 3681 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 3682 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
3683 | goto nla_put_failure; |
3684 | #if IS_ENABLED(CONFIG_IPV6) | |
3685 | } else { | |
930345ea | 3686 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 3687 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
3688 | goto nla_put_failure; |
3689 | #endif | |
3690 | } | |
3691 | } | |
d342894c | 3692 | |
11cd9476 JV |
3693 | if (fan_has_map(&vxlan->fan)) { |
3694 | struct nlattr *fan_nest; | |
3695 | struct ip_fan_map *fan_map; | |
3696 | ||
3697 | fan_nest = nla_nest_start(skb, IFLA_VXLAN_FAN_MAP); | |
3698 | if (!fan_nest) | |
3699 | goto nla_put_failure; | |
3700 | list_for_each_entry_rcu(fan_map, &vxlan->fan.fan_maps, list) { | |
3701 | struct ifla_fan_map map; | |
3702 | ||
3703 | map.underlay = fan_map->underlay; | |
3704 | map.underlay_prefix = fan_map->underlay_prefix; | |
3705 | map.overlay = fan_map->overlay; | |
3706 | map.overlay_prefix = fan_map->overlay_prefix; | |
3707 | if (nla_put(skb, IFLA_FAN_MAPPING, sizeof(map), &map)) | |
3708 | goto nla_put_failure; | |
3709 | } | |
3710 | nla_nest_end(skb, fan_nest); | |
3711 | } | |
3712 | ||
0dfbdf41 TG |
3713 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
3714 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || | |
e7f70af1 | 3715 | nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) || |
e4f67add | 3716 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
dc5321d7 | 3717 | !!(vxlan->cfg.flags & VXLAN_F_LEARN)) || |
e4f67add | 3718 | nla_put_u8(skb, IFLA_VXLAN_PROXY, |
dc5321d7 MS |
3719 | !!(vxlan->cfg.flags & VXLAN_F_PROXY)) || |
3720 | nla_put_u8(skb, IFLA_VXLAN_RSC, | |
3721 | !!(vxlan->cfg.flags & VXLAN_F_RSC)) || | |
e4f67add | 3722 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, |
dc5321d7 | 3723 | !!(vxlan->cfg.flags & VXLAN_F_L2MISS)) || |
e4f67add | 3724 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, |
dc5321d7 | 3725 | !!(vxlan->cfg.flags & VXLAN_F_L3MISS)) || |
da8b43c0 | 3726 | nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
dc5321d7 | 3727 | !!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)) || |
0dfbdf41 TG |
3728 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
3729 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
3730 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 | 3731 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
dc5321d7 | 3732 | !(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM_TX)) || |
359a0ea9 | 3733 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
dc5321d7 | 3734 | !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || |
359a0ea9 | 3735 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, |
dc5321d7 | 3736 | !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
dfd8645e | 3737 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, |
dc5321d7 | 3738 | !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_TX)) || |
dfd8645e | 3739 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, |
dc5321d7 | 3740 | !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_RX))) |
d342894c | 3741 | goto nla_put_failure; |
3742 | ||
05f47d69 | 3743 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
3744 | goto nla_put_failure; | |
3745 | ||
dc5321d7 | 3746 | if (vxlan->cfg.flags & VXLAN_F_GBP && |
3511494c TG |
3747 | nla_put_flag(skb, IFLA_VXLAN_GBP)) |
3748 | goto nla_put_failure; | |
3749 | ||
dc5321d7 | 3750 | if (vxlan->cfg.flags & VXLAN_F_GPE && |
e1e5314d JB |
3751 | nla_put_flag(skb, IFLA_VXLAN_GPE)) |
3752 | goto nla_put_failure; | |
3753 | ||
dc5321d7 | 3754 | if (vxlan->cfg.flags & VXLAN_F_REMCSUM_NOPARTIAL && |
0ace2ca8 TH |
3755 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) |
3756 | goto nla_put_failure; | |
3757 | ||
d342894c | 3758 | return 0; |
3759 | ||
3760 | nla_put_failure: | |
3761 | return -EMSGSIZE; | |
3762 | } | |
3763 | ||
1728d4fa ND |
3764 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
3765 | { | |
3766 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3767 | ||
3768 | return vxlan->net; | |
3769 | } | |
3770 | ||
d342894c | 3771 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
3772 | .kind = "vxlan", | |
3773 | .maxtype = IFLA_VXLAN_MAX, | |
3774 | .policy = vxlan_policy, | |
3775 | .priv_size = sizeof(struct vxlan_dev), | |
3776 | .setup = vxlan_setup, | |
3777 | .validate = vxlan_validate, | |
3778 | .newlink = vxlan_newlink, | |
8bcdc4f3 | 3779 | .changelink = vxlan_changelink, |
d342894c | 3780 | .dellink = vxlan_dellink, |
3781 | .get_size = vxlan_get_size, | |
3782 | .fill_info = vxlan_fill_info, | |
1728d4fa | 3783 | .get_link_net = vxlan_get_link_net, |
d342894c | 3784 | }; |
3785 | ||
cf5da330 ND |
3786 | struct net_device *vxlan_dev_create(struct net *net, const char *name, |
3787 | u8 name_assign_type, | |
3788 | struct vxlan_config *conf) | |
3789 | { | |
3790 | struct nlattr *tb[IFLA_MAX + 1]; | |
3791 | struct net_device *dev; | |
3792 | int err; | |
3793 | ||
3794 | memset(&tb, 0, sizeof(tb)); | |
3795 | ||
3796 | dev = rtnl_create_link(net, name, name_assign_type, | |
3797 | &vxlan_link_ops, tb); | |
3798 | if (IS_ERR(dev)) | |
3799 | return dev; | |
3800 | ||
c80498e3 | 3801 | err = __vxlan_dev_create(net, dev, conf); |
cf5da330 ND |
3802 | if (err < 0) { |
3803 | free_netdev(dev); | |
3804 | return ERR_PTR(err); | |
3805 | } | |
3806 | ||
3807 | err = rtnl_configure_link(dev, NULL); | |
3808 | if (err < 0) { | |
3809 | LIST_HEAD(list_kill); | |
3810 | ||
3811 | vxlan_dellink(dev, &list_kill); | |
3812 | unregister_netdevice_many(&list_kill); | |
3813 | return ERR_PTR(err); | |
3814 | } | |
3815 | ||
3816 | return dev; | |
3817 | } | |
3818 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
3819 | ||
acaf4e70 DB |
3820 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
3821 | struct net_device *dev) | |
3822 | { | |
3823 | struct vxlan_dev *vxlan, *next; | |
3824 | LIST_HEAD(list_kill); | |
3825 | ||
3826 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3827 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3828 | ||
3829 | /* In case we created vxlan device with carrier | |
3830 | * and we loose the carrier due to module unload | |
3831 | * we also need to remove vxlan device. In other | |
3832 | * cases, it's not necessary and remote_ifindex | |
3833 | * is 0 here, so no matches. | |
3834 | */ | |
3835 | if (dst->remote_ifindex == dev->ifindex) | |
3836 | vxlan_dellink(vxlan->dev, &list_kill); | |
3837 | } | |
3838 | ||
3839 | unregister_netdevice_many(&list_kill); | |
3840 | } | |
3841 | ||
b7aade15 HFS |
3842 | static int vxlan_netdevice_event(struct notifier_block *unused, |
3843 | unsigned long event, void *ptr) | |
acaf4e70 DB |
3844 | { |
3845 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 3846 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 3847 | |
783c1463 | 3848 | if (event == NETDEV_UNREGISTER) |
acaf4e70 | 3849 | vxlan_handle_lowerdev_unregister(vn, dev); |
7c46a640 | 3850 | else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO) |
b7aade15 | 3851 | vxlan_push_rx_ports(dev); |
acaf4e70 DB |
3852 | |
3853 | return NOTIFY_DONE; | |
3854 | } | |
3855 | ||
3856 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
b7aade15 | 3857 | .notifier_call = vxlan_netdevice_event, |
acaf4e70 DB |
3858 | }; |
3859 | ||
d342894c | 3860 | static __net_init int vxlan_init_net(struct net *net) |
3861 | { | |
3862 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 3863 | unsigned int h; |
d342894c | 3864 | |
553675fb | 3865 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 3866 | spin_lock_init(&vn->sock_lock); |
d342894c | 3867 | |
553675fb | 3868 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
3869 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 3870 | |
3871 | return 0; | |
3872 | } | |
3873 | ||
11cd9476 JV |
3874 | #ifdef CONFIG_SYSCTL |
3875 | static struct ctl_table_header *vxlan_fan_header; | |
3876 | static unsigned int vxlan_fan_version = 4; | |
3877 | ||
3878 | static struct ctl_table vxlan_fan_sysctls[] = { | |
3879 | { | |
3880 | .procname = "vxlan", | |
3881 | .data = &vxlan_fan_version, | |
3882 | .maxlen = sizeof(vxlan_fan_version), | |
3883 | .mode = 0444, | |
3884 | .proc_handler = proc_dointvec, | |
3885 | }, | |
3886 | {}, | |
3887 | }; | |
3888 | #endif /* CONFIG_SYSCTL */ | |
3889 | ||
f01ec1c0 ND |
3890 | static void __net_exit vxlan_exit_net(struct net *net) |
3891 | { | |
3892 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3893 | struct vxlan_dev *vxlan, *next; | |
3894 | struct net_device *dev, *aux; | |
3895 | LIST_HEAD(list); | |
3896 | ||
3897 | rtnl_lock(); | |
3898 | for_each_netdev_safe(net, dev, aux) | |
3899 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
3900 | unregister_netdevice_queue(dev, &list); | |
3901 | ||
3902 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3903 | /* If vxlan->dev is in the same netns, it has already been added | |
3904 | * to the list by the previous loop. | |
3905 | */ | |
58ce31cc TH |
3906 | if (!net_eq(dev_net(vxlan->dev), net)) { |
3907 | gro_cells_destroy(&vxlan->gro_cells); | |
13c3ed6a | 3908 | unregister_netdevice_queue(vxlan->dev, &list); |
58ce31cc | 3909 | } |
f01ec1c0 ND |
3910 | } |
3911 | ||
3912 | unregister_netdevice_many(&list); | |
3913 | rtnl_unlock(); | |
3914 | } | |
3915 | ||
d342894c | 3916 | static struct pernet_operations vxlan_net_ops = { |
3917 | .init = vxlan_init_net, | |
f01ec1c0 | 3918 | .exit = vxlan_exit_net, |
d342894c | 3919 | .id = &vxlan_net_id, |
3920 | .size = sizeof(struct vxlan_net), | |
3921 | }; | |
3922 | ||
3923 | static int __init vxlan_init_module(void) | |
3924 | { | |
3925 | int rc; | |
3926 | ||
3927 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); | |
3928 | ||
783c1463 | 3929 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 3930 | if (rc) |
3931 | goto out1; | |
3932 | ||
acaf4e70 | 3933 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 3934 | if (rc) |
3935 | goto out2; | |
3936 | ||
acaf4e70 DB |
3937 | rc = rtnl_link_register(&vxlan_link_ops); |
3938 | if (rc) | |
3939 | goto out3; | |
d342894c | 3940 | |
11cd9476 JV |
3941 | #ifdef CONFIG_SYSCTL |
3942 | vxlan_fan_header = register_net_sysctl(&init_net, "net/fan", | |
3943 | vxlan_fan_sysctls); | |
3944 | if (!vxlan_fan_header) { | |
3945 | rc = -ENOMEM; | |
3946 | goto sysctl_failed; | |
3947 | } | |
3948 | #endif /* CONFIG_SYSCTL */ | |
3949 | ||
acaf4e70 | 3950 | return 0; |
11cd9476 JV |
3951 | #ifdef CONFIG_SYSCTL |
3952 | sysctl_failed: | |
3953 | rtnl_link_unregister(&vxlan_link_ops); | |
3954 | #endif /* CONFIG_SYSCTL */ | |
acaf4e70 DB |
3955 | out3: |
3956 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 3957 | out2: |
783c1463 | 3958 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 3959 | out1: |
3960 | return rc; | |
3961 | } | |
7332a13b | 3962 | late_initcall(vxlan_init_module); |
d342894c | 3963 | |
3964 | static void __exit vxlan_cleanup_module(void) | |
3965 | { | |
11cd9476 JV |
3966 | #ifdef CONFIG_SYSCTL |
3967 | unregister_net_sysctl_table(vxlan_fan_header); | |
3968 | #endif /* CONFIG_SYSCTL */ | |
b7153984 | 3969 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 3970 | unregister_netdevice_notifier(&vxlan_notifier_block); |
783c1463 DB |
3971 | unregister_pernet_subsys(&vxlan_net_ops); |
3972 | /* rcu_barrier() is called by netns */ | |
d342894c | 3973 | } |
3974 | module_exit(vxlan_cleanup_module); | |
3975 | ||
3976 | MODULE_LICENSE("GPL"); | |
3977 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 3978 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 3979 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 3980 | MODULE_ALIAS_RTNL_LINK("vxlan"); |