Commit | Line | Data |
---|---|---|
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> | |
14 | #include <linux/types.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/rculist.h> | |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/in.h> | |
22 | #include <linux/ip.h> | |
23 | #include <linux/udp.h> | |
24 | #include <linux/igmp.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/if_ether.h> | |
1eaa8178 | 27 | #include <linux/if_vlan.h> |
d342894c | 28 | #include <linux/hash.h> |
1b13c97f | 29 | #include <linux/ethtool.h> |
e4f67add DS |
30 | #include <net/arp.h> |
31 | #include <net/ndisc.h> | |
d342894c | 32 | #include <net/ip.h> |
c5441932 | 33 | #include <net/ip_tunnels.h> |
d342894c | 34 | #include <net/icmp.h> |
35 | #include <net/udp.h> | |
3ee64f39 | 36 | #include <net/udp_tunnel.h> |
d342894c | 37 | #include <net/rtnetlink.h> |
38 | #include <net/route.h> | |
39 | #include <net/dsfield.h> | |
40 | #include <net/inet_ecn.h> | |
41 | #include <net/net_namespace.h> | |
42 | #include <net/netns/generic.h> | |
012a5729 | 43 | #include <net/vxlan.h> |
dc01e7d3 | 44 | #include <net/protocol.h> |
acbf74a7 | 45 | #include <net/udp_tunnel.h> |
e4c7ed41 CW |
46 | #if IS_ENABLED(CONFIG_IPV6) |
47 | #include <net/ipv6.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/ip6_tunnel.h> | |
660d98ca | 50 | #include <net/ip6_checksum.h> |
e4c7ed41 | 51 | #endif |
ee122c79 | 52 | #include <net/dst_metadata.h> |
d342894c | 53 | |
54 | #define VXLAN_VERSION "0.1" | |
55 | ||
553675fb | 56 | #define PORT_HASH_BITS 8 |
57 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 58 | #define FDB_AGE_DEFAULT 300 /* 5 min */ |
59 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
60 | ||
23c578bf | 61 | /* UDP port for VXLAN traffic. |
62 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 63 | * for compatibility with early adopters. |
23c578bf | 64 | */ |
9daaa397 SH |
65 | static unsigned short vxlan_port __read_mostly = 8472; |
66 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 67 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
68 | ||
69 | static bool log_ecn_error = true; | |
70 | module_param(log_ecn_error, bool, 0644); | |
71 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
72 | ||
60d9d4c6 | 73 | static int vxlan_net_id; |
0dfbdf41 | 74 | static struct rtnl_link_ops vxlan_link_ops; |
553675fb | 75 | |
afbd8bae MR |
76 | static const u8 all_zeros_mac[ETH_ALEN]; |
77 | ||
614732ea TG |
78 | static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
79 | bool no_share, u32 flags); | |
80 | ||
553675fb | 81 | /* per-network namespace private data for this module */ |
82 | struct vxlan_net { | |
83 | struct list_head vxlan_list; | |
84 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 85 | spinlock_t sock_lock; |
553675fb | 86 | }; |
87 | ||
d342894c | 88 | /* Forwarding table entry */ |
89 | struct vxlan_fdb { | |
90 | struct hlist_node hlist; /* linked list of entries */ | |
91 | struct rcu_head rcu; | |
92 | unsigned long updated; /* jiffies */ | |
93 | unsigned long used; | |
3e61aa8f | 94 | struct list_head remotes; |
7177a3b0 | 95 | u8 eth_addr[ETH_ALEN]; |
d342894c | 96 | u16 state; /* see ndm_state */ |
ae884082 | 97 | u8 flags; /* see ndm_flags */ |
d342894c | 98 | }; |
99 | ||
d342894c | 100 | /* salt for hash table */ |
101 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 102 | static struct workqueue_struct *vxlan_wq; |
d342894c | 103 | |
ee122c79 TG |
104 | static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
105 | { | |
e7030878 TG |
106 | return vs->flags & VXLAN_F_COLLECT_METADATA || |
107 | ip_tunnel_collect_metadata(); | |
ee122c79 TG |
108 | } |
109 | ||
e4c7ed41 CW |
110 | #if IS_ENABLED(CONFIG_IPV6) |
111 | static inline | |
112 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
113 | { | |
f0ef3126 JB |
114 | if (a->sa.sa_family != b->sa.sa_family) |
115 | return false; | |
116 | if (a->sa.sa_family == AF_INET6) | |
117 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
118 | else | |
119 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
e4c7ed41 CW |
120 | } |
121 | ||
122 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
123 | { | |
f0ef3126 JB |
124 | if (ipa->sa.sa_family == AF_INET6) |
125 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
126 | else | |
127 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
e4c7ed41 CW |
128 | } |
129 | ||
130 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
131 | { | |
f0ef3126 JB |
132 | if (ipa->sa.sa_family == AF_INET6) |
133 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
134 | else | |
135 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
e4c7ed41 CW |
136 | } |
137 | ||
138 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
139 | { | |
f0ef3126 | 140 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
67b61f6c | 141 | ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
f0ef3126 JB |
142 | ip->sa.sa_family = AF_INET6; |
143 | return 0; | |
144 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 145 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
146 | ip->sa.sa_family = AF_INET; |
147 | return 0; | |
148 | } else { | |
149 | return -EAFNOSUPPORT; | |
150 | } | |
e4c7ed41 CW |
151 | } |
152 | ||
153 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 154 | const union vxlan_addr *ip) |
e4c7ed41 | 155 | { |
f0ef3126 | 156 | if (ip->sa.sa_family == AF_INET6) |
930345ea | 157 | return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
f0ef3126 | 158 | else |
930345ea | 159 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
160 | } |
161 | ||
162 | #else /* !CONFIG_IPV6 */ | |
163 | ||
164 | static inline | |
165 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
166 | { | |
f0ef3126 | 167 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
e4c7ed41 CW |
168 | } |
169 | ||
170 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
171 | { | |
f0ef3126 | 172 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); |
e4c7ed41 CW |
173 | } |
174 | ||
175 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
176 | { | |
f0ef3126 | 177 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); |
e4c7ed41 CW |
178 | } |
179 | ||
180 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
181 | { | |
f0ef3126 JB |
182 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
183 | return -EAFNOSUPPORT; | |
184 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 185 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
186 | ip->sa.sa_family = AF_INET; |
187 | return 0; | |
188 | } else { | |
189 | return -EAFNOSUPPORT; | |
190 | } | |
e4c7ed41 CW |
191 | } |
192 | ||
193 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 194 | const union vxlan_addr *ip) |
e4c7ed41 | 195 | { |
930345ea | 196 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
197 | } |
198 | #endif | |
199 | ||
553675fb | 200 | /* Virtual Network hash table head */ |
201 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
202 | { | |
203 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
204 | } | |
205 | ||
206 | /* Socket hash table head */ | |
207 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 208 | { |
209 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
210 | ||
553675fb | 211 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
212 | } | |
213 | ||
3e61aa8f SH |
214 | /* First remote destination for a forwarding entry. |
215 | * Guaranteed to be non-NULL because remotes are never deleted. | |
216 | */ | |
5ca5461c | 217 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 218 | { |
5ca5461c | 219 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
220 | } | |
221 | ||
222 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
223 | { | |
224 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
225 | } |
226 | ||
ac5132d1 TG |
227 | /* Find VXLAN socket based on network namespace, address family and UDP port |
228 | * and enabled unshareable flags. | |
229 | */ | |
230 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
231 | __be16 port, u32 flags) | |
553675fb | 232 | { |
233 | struct vxlan_sock *vs; | |
af33c1ad TH |
234 | |
235 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 236 | |
237 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 238 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
705cc62f | 239 | vxlan_get_sk_family(vs) == family && |
af33c1ad | 240 | vs->flags == flags) |
553675fb | 241 | return vs; |
242 | } | |
243 | return NULL; | |
d342894c | 244 | } |
245 | ||
5cfccc5a | 246 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id) |
d342894c | 247 | { |
248 | struct vxlan_dev *vxlan; | |
d342894c | 249 | |
553675fb | 250 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { |
c7995c43 | 251 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 252 | return vxlan; |
253 | } | |
254 | ||
255 | return NULL; | |
256 | } | |
257 | ||
5cfccc5a | 258 | /* Look up VNI in a per net namespace table */ |
19ca9fc1 | 259 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, |
ac5132d1 TG |
260 | sa_family_t family, __be16 port, |
261 | u32 flags) | |
5cfccc5a PS |
262 | { |
263 | struct vxlan_sock *vs; | |
264 | ||
ac5132d1 | 265 | vs = vxlan_find_sock(net, family, port, flags); |
5cfccc5a PS |
266 | if (!vs) |
267 | return NULL; | |
268 | ||
269 | return vxlan_vs_find_vni(vs, id); | |
270 | } | |
271 | ||
d342894c | 272 | /* Fill in neighbour message in skbuff. */ |
273 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
274 | const struct vxlan_fdb *fdb, |
275 | u32 portid, u32 seq, int type, unsigned int flags, | |
276 | const struct vxlan_rdst *rdst) | |
d342894c | 277 | { |
278 | unsigned long now = jiffies; | |
279 | struct nda_cacheinfo ci; | |
280 | struct nlmsghdr *nlh; | |
281 | struct ndmsg *ndm; | |
e4f67add | 282 | bool send_ip, send_eth; |
d342894c | 283 | |
284 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
285 | if (nlh == NULL) | |
286 | return -EMSGSIZE; | |
287 | ||
288 | ndm = nlmsg_data(nlh); | |
289 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
290 | |
291 | send_eth = send_ip = true; | |
292 | ||
293 | if (type == RTM_GETNEIGH) { | |
294 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 295 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
296 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
297 | } else | |
298 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 299 | ndm->ndm_state = fdb->state; |
300 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 301 | ndm->ndm_flags = fdb->flags; |
545469f7 | 302 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 303 | |
193523bf | 304 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 305 | nla_put_s32(skb, NDA_LINK_NETNSID, |
7a0877d4 | 306 | peernet2id_alloc(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
307 | goto nla_put_failure; |
308 | ||
e4f67add | 309 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 310 | goto nla_put_failure; |
311 | ||
e4c7ed41 | 312 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
313 | goto nla_put_failure; |
314 | ||
0dfbdf41 | 315 | if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && |
6681712d DS |
316 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
317 | goto nla_put_failure; | |
c7995c43 | 318 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 319 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
320 | goto nla_put_failure; |
321 | if (rdst->remote_ifindex && | |
322 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 323 | goto nla_put_failure; |
324 | ||
325 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
326 | ci.ndm_confirmed = 0; | |
327 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
328 | ci.ndm_refcnt = 0; | |
329 | ||
330 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
331 | goto nla_put_failure; | |
332 | ||
053c095a JB |
333 | nlmsg_end(skb, nlh); |
334 | return 0; | |
d342894c | 335 | |
336 | nla_put_failure: | |
337 | nlmsg_cancel(skb, nlh); | |
338 | return -EMSGSIZE; | |
339 | } | |
340 | ||
341 | static inline size_t vxlan_nlmsg_size(void) | |
342 | { | |
343 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
344 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 345 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 346 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
347 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
348 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 349 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 350 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
351 | } | |
352 | ||
9e4b93f9 ND |
353 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
354 | struct vxlan_rdst *rd, int type) | |
d342894c | 355 | { |
356 | struct net *net = dev_net(vxlan->dev); | |
357 | struct sk_buff *skb; | |
358 | int err = -ENOBUFS; | |
359 | ||
360 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
361 | if (skb == NULL) | |
362 | goto errout; | |
363 | ||
9e4b93f9 | 364 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 365 | if (err < 0) { |
366 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
367 | WARN_ON(err == -EMSGSIZE); | |
368 | kfree_skb(skb); | |
369 | goto errout; | |
370 | } | |
371 | ||
372 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
373 | return; | |
374 | errout: | |
375 | if (err < 0) | |
376 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
377 | } | |
378 | ||
e4c7ed41 | 379 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
380 | { |
381 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
382 | struct vxlan_fdb f = { |
383 | .state = NUD_STALE, | |
384 | }; | |
385 | struct vxlan_rdst remote = { | |
e4c7ed41 | 386 | .remote_ip = *ipa, /* goes to NDA_DST */ |
bb3fd687 SH |
387 | .remote_vni = VXLAN_N_VID, |
388 | }; | |
3e61aa8f | 389 | |
9e4b93f9 | 390 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
391 | } |
392 | ||
393 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
394 | { | |
bb3fd687 SH |
395 | struct vxlan_fdb f = { |
396 | .state = NUD_STALE, | |
397 | }; | |
9e4b93f9 | 398 | struct vxlan_rdst remote = { }; |
e4f67add | 399 | |
e4f67add DS |
400 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
401 | ||
9e4b93f9 | 402 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
403 | } |
404 | ||
d342894c | 405 | /* Hash Ethernet address */ |
406 | static u32 eth_hash(const unsigned char *addr) | |
407 | { | |
408 | u64 value = get_unaligned((u64 *)addr); | |
409 | ||
410 | /* only want 6 bytes */ | |
411 | #ifdef __BIG_ENDIAN | |
d342894c | 412 | value >>= 16; |
321fb991 | 413 | #else |
414 | value <<= 16; | |
d342894c | 415 | #endif |
416 | return hash_64(value, FDB_HASH_BITS); | |
417 | } | |
418 | ||
419 | /* Hash chain to use given mac address */ | |
420 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
421 | const u8 *mac) | |
422 | { | |
423 | return &vxlan->fdb_head[eth_hash(mac)]; | |
424 | } | |
425 | ||
426 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 427 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 428 | const u8 *mac) |
d342894c | 429 | { |
430 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
431 | struct vxlan_fdb *f; | |
d342894c | 432 | |
b67bfe0d | 433 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 434 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 435 | return f; |
436 | } | |
437 | ||
438 | return NULL; | |
439 | } | |
440 | ||
014be2c8 SS |
441 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
442 | const u8 *mac) | |
443 | { | |
444 | struct vxlan_fdb *f; | |
445 | ||
446 | f = __vxlan_find_mac(vxlan, mac); | |
447 | if (f) | |
448 | f->used = jiffies; | |
449 | ||
450 | return f; | |
451 | } | |
452 | ||
a5e7c10a MR |
453 | /* caller should hold vxlan->hash_lock */ |
454 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 455 | union vxlan_addr *ip, __be16 port, |
a5e7c10a | 456 | __u32 vni, __u32 ifindex) |
6681712d | 457 | { |
3e61aa8f | 458 | struct vxlan_rdst *rd; |
6681712d | 459 | |
3e61aa8f | 460 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 461 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
462 | rd->remote_port == port && |
463 | rd->remote_vni == vni && | |
464 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 465 | return rd; |
6681712d | 466 | } |
3e61aa8f | 467 | |
a5e7c10a MR |
468 | return NULL; |
469 | } | |
470 | ||
906dc186 TR |
471 | /* Replace destination of unicast mac */ |
472 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
e4c7ed41 | 473 | union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex) |
906dc186 TR |
474 | { |
475 | struct vxlan_rdst *rd; | |
476 | ||
477 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
478 | if (rd) | |
479 | return 0; | |
480 | ||
481 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
482 | if (!rd) | |
483 | return 0; | |
e4c7ed41 | 484 | rd->remote_ip = *ip; |
906dc186 TR |
485 | rd->remote_port = port; |
486 | rd->remote_vni = vni; | |
487 | rd->remote_ifindex = ifindex; | |
488 | return 1; | |
489 | } | |
490 | ||
a5e7c10a MR |
491 | /* Add/update destinations for multicast */ |
492 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
9e4b93f9 ND |
493 | union vxlan_addr *ip, __be16 port, __u32 vni, |
494 | __u32 ifindex, struct vxlan_rdst **rdp) | |
a5e7c10a MR |
495 | { |
496 | struct vxlan_rdst *rd; | |
497 | ||
498 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
499 | if (rd) | |
500 | return 0; | |
501 | ||
6681712d DS |
502 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
503 | if (rd == NULL) | |
504 | return -ENOBUFS; | |
e4c7ed41 | 505 | rd->remote_ip = *ip; |
6681712d DS |
506 | rd->remote_port = port; |
507 | rd->remote_vni = vni; | |
508 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
509 | |
510 | list_add_tail_rcu(&rd->list, &f->remotes); | |
511 | ||
9e4b93f9 | 512 | *rdp = rd; |
6681712d DS |
513 | return 1; |
514 | } | |
515 | ||
dfd8645e TH |
516 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
517 | unsigned int off, | |
518 | struct vxlanhdr *vh, size_t hdrlen, | |
0ace2ca8 TH |
519 | u32 data, struct gro_remcsum *grc, |
520 | bool nopartial) | |
dfd8645e | 521 | { |
b7fe10e5 | 522 | size_t start, offset; |
dfd8645e TH |
523 | |
524 | if (skb->remcsum_offload) | |
b7fe10e5 | 525 | return vh; |
dfd8645e TH |
526 | |
527 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
528 | return NULL; | |
529 | ||
530 | start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; | |
531 | offset = start + ((data & VXLAN_RCO_UDP) ? | |
532 | offsetof(struct udphdr, check) : | |
533 | offsetof(struct tcphdr, check)); | |
534 | ||
b7fe10e5 TH |
535 | vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
536 | start, offset, grc, nopartial); | |
dfd8645e TH |
537 | |
538 | skb->remcsum_offload = 1; | |
539 | ||
540 | return vh; | |
541 | } | |
542 | ||
a2b12f3c TH |
543 | static struct sk_buff **vxlan_gro_receive(struct sk_buff **head, |
544 | struct sk_buff *skb, | |
545 | struct udp_offload *uoff) | |
dc01e7d3 OG |
546 | { |
547 | struct sk_buff *p, **pp = NULL; | |
548 | struct vxlanhdr *vh, *vh2; | |
9b174d88 | 549 | unsigned int hlen, off_vx; |
dc01e7d3 | 550 | int flush = 1; |
dfd8645e TH |
551 | struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock, |
552 | udp_offloads); | |
553 | u32 flags; | |
26c4f7da TH |
554 | struct gro_remcsum grc; |
555 | ||
556 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
557 | |
558 | off_vx = skb_gro_offset(skb); | |
559 | hlen = off_vx + sizeof(*vh); | |
560 | vh = skb_gro_header_fast(skb, off_vx); | |
561 | if (skb_gro_header_hard(skb, hlen)) { | |
562 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
563 | if (unlikely(!vh)) | |
564 | goto out; | |
565 | } | |
dc01e7d3 | 566 | |
dfd8645e TH |
567 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
568 | ||
569 | flags = ntohl(vh->vx_flags); | |
570 | ||
571 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
572 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
0ace2ca8 TH |
573 | ntohl(vh->vx_vni), &grc, |
574 | !!(vs->flags & | |
575 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
576 | |
577 | if (!vh) | |
578 | goto out; | |
579 | } | |
580 | ||
b7fe10e5 TH |
581 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
582 | ||
dc01e7d3 OG |
583 | flush = 0; |
584 | ||
585 | for (p = *head; p; p = p->next) { | |
586 | if (!NAPI_GRO_CB(p)->same_flow) | |
587 | continue; | |
588 | ||
589 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
590 | if (vh->vx_flags != vh2->vx_flags || |
591 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
592 | NAPI_GRO_CB(p)->same_flow = 0; |
593 | continue; | |
594 | } | |
dc01e7d3 OG |
595 | } |
596 | ||
9b174d88 | 597 | pp = eth_gro_receive(head, skb); |
dc01e7d3 | 598 | |
dc01e7d3 | 599 | out: |
26c4f7da | 600 | skb_gro_remcsum_cleanup(skb, &grc); |
dc01e7d3 OG |
601 | NAPI_GRO_CB(skb)->flush |= flush; |
602 | ||
603 | return pp; | |
604 | } | |
605 | ||
a2b12f3c TH |
606 | static int vxlan_gro_complete(struct sk_buff *skb, int nhoff, |
607 | struct udp_offload *uoff) | |
dc01e7d3 | 608 | { |
cfdf1e1b JG |
609 | udp_tunnel_gro_complete(skb, nhoff); |
610 | ||
9b174d88 | 611 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
612 | } |
613 | ||
53cf5275 | 614 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 615 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
616 | { |
617 | struct net_device *dev; | |
dc01e7d3 | 618 | struct sock *sk = vs->sock->sk; |
53cf5275 | 619 | struct net *net = sock_net(sk); |
705cc62f | 620 | sa_family_t sa_family = vxlan_get_sk_family(vs); |
35e42379 | 621 | __be16 port = inet_sk(sk)->inet_sport; |
dc01e7d3 OG |
622 | int err; |
623 | ||
624 | if (sa_family == AF_INET) { | |
625 | err = udp_add_offload(&vs->udp_offloads); | |
626 | if (err) | |
627 | pr_warn("vxlan: udp_add_offload failed with status %d\n", err); | |
628 | } | |
53cf5275 JG |
629 | |
630 | rcu_read_lock(); | |
631 | for_each_netdev_rcu(net, dev) { | |
632 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
633 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
634 | port); | |
635 | } | |
636 | rcu_read_unlock(); | |
637 | } | |
638 | ||
639 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 640 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
641 | { |
642 | struct net_device *dev; | |
dc01e7d3 | 643 | struct sock *sk = vs->sock->sk; |
53cf5275 | 644 | struct net *net = sock_net(sk); |
705cc62f | 645 | sa_family_t sa_family = vxlan_get_sk_family(vs); |
35e42379 | 646 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
647 | |
648 | rcu_read_lock(); | |
649 | for_each_netdev_rcu(net, dev) { | |
650 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
651 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
652 | port); | |
653 | } | |
654 | rcu_read_unlock(); | |
dc01e7d3 OG |
655 | |
656 | if (sa_family == AF_INET) | |
657 | udp_del_offload(&vs->udp_offloads); | |
53cf5275 JG |
658 | } |
659 | ||
d342894c | 660 | /* Add new entry to forwarding table -- assumes lock held */ |
661 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 662 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 663 | __u16 state, __u16 flags, |
73cf3317 | 664 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 665 | __u8 ndm_flags) |
d342894c | 666 | { |
9e4b93f9 | 667 | struct vxlan_rdst *rd = NULL; |
d342894c | 668 | struct vxlan_fdb *f; |
669 | int notify = 0; | |
670 | ||
014be2c8 | 671 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 672 | if (f) { |
673 | if (flags & NLM_F_EXCL) { | |
674 | netdev_dbg(vxlan->dev, | |
675 | "lost race to create %pM\n", mac); | |
676 | return -EEXIST; | |
677 | } | |
678 | if (f->state != state) { | |
679 | f->state = state; | |
680 | f->updated = jiffies; | |
681 | notify = 1; | |
682 | } | |
ae884082 DS |
683 | if (f->flags != ndm_flags) { |
684 | f->flags = ndm_flags; | |
685 | f->updated = jiffies; | |
686 | notify = 1; | |
687 | } | |
906dc186 TR |
688 | if ((flags & NLM_F_REPLACE)) { |
689 | /* Only change unicasts */ | |
690 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
691 | is_zero_ether_addr(f->eth_addr))) { | |
60840429 | 692 | notify |= vxlan_fdb_replace(f, ip, port, vni, |
906dc186 | 693 | ifindex); |
906dc186 TR |
694 | } else |
695 | return -EOPNOTSUPP; | |
696 | } | |
6681712d | 697 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
698 | (is_multicast_ether_addr(f->eth_addr) || |
699 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
700 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
701 | &rd); | |
6681712d DS |
702 | |
703 | if (rc < 0) | |
704 | return rc; | |
705 | notify |= rc; | |
706 | } | |
d342894c | 707 | } else { |
708 | if (!(flags & NLM_F_CREATE)) | |
709 | return -ENOENT; | |
710 | ||
0dfbdf41 TG |
711 | if (vxlan->cfg.addrmax && |
712 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
d342894c | 713 | return -ENOSPC; |
714 | ||
906dc186 TR |
715 | /* Disallow replace to add a multicast entry */ |
716 | if ((flags & NLM_F_REPLACE) && | |
717 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
718 | return -EOPNOTSUPP; | |
719 | ||
e4c7ed41 | 720 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 721 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
722 | if (!f) | |
723 | return -ENOMEM; | |
724 | ||
725 | notify = 1; | |
d342894c | 726 | f->state = state; |
ae884082 | 727 | f->flags = ndm_flags; |
d342894c | 728 | f->updated = f->used = jiffies; |
3e61aa8f | 729 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 730 | memcpy(f->eth_addr, mac, ETH_ALEN); |
731 | ||
9e4b93f9 | 732 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 733 | |
d342894c | 734 | ++vxlan->addrcnt; |
735 | hlist_add_head_rcu(&f->hlist, | |
736 | vxlan_fdb_head(vxlan, mac)); | |
737 | } | |
738 | ||
9e4b93f9 ND |
739 | if (notify) { |
740 | if (rd == NULL) | |
741 | rd = first_remote_rtnl(f); | |
742 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
743 | } | |
d342894c | 744 | |
745 | return 0; | |
746 | } | |
747 | ||
6706c82e | 748 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
749 | { |
750 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 751 | struct vxlan_rdst *rd, *nd; |
6681712d | 752 | |
3e61aa8f | 753 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 754 | kfree(rd); |
6681712d DS |
755 | kfree(f); |
756 | } | |
757 | ||
d342894c | 758 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
759 | { | |
760 | netdev_dbg(vxlan->dev, | |
761 | "delete %pM\n", f->eth_addr); | |
762 | ||
763 | --vxlan->addrcnt; | |
9e4b93f9 | 764 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 765 | |
766 | hlist_del_rcu(&f->hlist); | |
6681712d | 767 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 768 | } |
769 | ||
f0b074be | 770 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
e4c7ed41 | 771 | union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex) |
d342894c | 772 | { |
6681712d | 773 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 774 | int err; |
d342894c | 775 | |
f0b074be | 776 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
777 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
778 | if (err) | |
779 | return err; | |
f0b074be | 780 | } else { |
e4c7ed41 CW |
781 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
782 | if (remote->sa.sa_family == AF_INET) { | |
783 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
784 | ip->sa.sa_family = AF_INET; | |
785 | #if IS_ENABLED(CONFIG_IPV6) | |
786 | } else { | |
787 | ip->sin6.sin6_addr = in6addr_any; | |
788 | ip->sa.sa_family = AF_INET6; | |
789 | #endif | |
790 | } | |
f0b074be | 791 | } |
d342894c | 792 | |
6681712d | 793 | if (tb[NDA_PORT]) { |
73cf3317 | 794 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 795 | return -EINVAL; |
f0b074be MR |
796 | *port = nla_get_be16(tb[NDA_PORT]); |
797 | } else { | |
0dfbdf41 | 798 | *port = vxlan->cfg.dst_port; |
f0b074be | 799 | } |
6681712d DS |
800 | |
801 | if (tb[NDA_VNI]) { | |
802 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
803 | return -EINVAL; | |
f0b074be MR |
804 | *vni = nla_get_u32(tb[NDA_VNI]); |
805 | } else { | |
806 | *vni = vxlan->default_dst.remote_vni; | |
807 | } | |
6681712d DS |
808 | |
809 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 810 | struct net_device *tdev; |
6681712d DS |
811 | |
812 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
813 | return -EINVAL; | |
f0b074be | 814 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 815 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 816 | if (!tdev) |
6681712d | 817 | return -EADDRNOTAVAIL; |
f0b074be MR |
818 | } else { |
819 | *ifindex = 0; | |
820 | } | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | /* Add static entry (via netlink) */ | |
826 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
827 | struct net_device *dev, | |
f6f6424b | 828 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
829 | { |
830 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
831 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 832 | union vxlan_addr ip; |
f0b074be MR |
833 | __be16 port; |
834 | u32 vni, ifindex; | |
835 | int err; | |
836 | ||
837 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
838 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
839 | ndm->ndm_state); | |
840 | return -EINVAL; | |
841 | } | |
842 | ||
843 | if (tb[NDA_DST] == NULL) | |
844 | return -EINVAL; | |
845 | ||
846 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
847 | if (err) | |
848 | return err; | |
6681712d | 849 | |
5933a7bb MR |
850 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
851 | return -EAFNOSUPPORT; | |
852 | ||
d342894c | 853 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 854 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 855 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 856 | spin_unlock_bh(&vxlan->hash_lock); |
857 | ||
858 | return err; | |
859 | } | |
860 | ||
861 | /* Delete entry (via netlink) */ | |
1690be63 VY |
862 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
863 | struct net_device *dev, | |
f6f6424b | 864 | const unsigned char *addr, u16 vid) |
d342894c | 865 | { |
866 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
867 | struct vxlan_fdb *f; | |
bc7892ba | 868 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 869 | union vxlan_addr ip; |
bc7892ba MR |
870 | __be16 port; |
871 | u32 vni, ifindex; | |
872 | int err; | |
873 | ||
874 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
875 | if (err) | |
876 | return err; | |
877 | ||
878 | err = -ENOENT; | |
d342894c | 879 | |
880 | spin_lock_bh(&vxlan->hash_lock); | |
881 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
882 | if (!f) |
883 | goto out; | |
884 | ||
e4c7ed41 CW |
885 | if (!vxlan_addr_any(&ip)) { |
886 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
887 | if (!rd) |
888 | goto out; | |
889 | } | |
890 | ||
891 | err = 0; | |
892 | ||
893 | /* remove a destination if it's not the only one on the list, | |
894 | * otherwise destroy the fdb entry | |
895 | */ | |
896 | if (rd && !list_is_singular(&f->remotes)) { | |
897 | list_del_rcu(&rd->list); | |
9e4b93f9 | 898 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 899 | kfree_rcu(rd, rcu); |
bc7892ba | 900 | goto out; |
d342894c | 901 | } |
bc7892ba MR |
902 | |
903 | vxlan_fdb_destroy(vxlan, f); | |
904 | ||
905 | out: | |
d342894c | 906 | spin_unlock_bh(&vxlan->hash_lock); |
907 | ||
908 | return err; | |
909 | } | |
910 | ||
911 | /* Dump forwarding table */ | |
912 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 JHS |
913 | struct net_device *dev, |
914 | struct net_device *filter_dev, int idx) | |
d342894c | 915 | { |
916 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
917 | unsigned int h; | |
918 | ||
919 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
920 | struct vxlan_fdb *f; | |
d342894c | 921 | int err; |
922 | ||
b67bfe0d | 923 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 924 | struct vxlan_rdst *rd; |
6681712d | 925 | |
3e61aa8f | 926 | list_for_each_entry_rcu(rd, &f->remotes, list) { |
07a51cd3 AW |
927 | if (idx < cb->args[0]) |
928 | goto skip; | |
929 | ||
6681712d DS |
930 | err = vxlan_fdb_info(skb, vxlan, f, |
931 | NETLINK_CB(cb->skb).portid, | |
932 | cb->nlh->nlmsg_seq, | |
933 | RTM_NEWNEIGH, | |
934 | NLM_F_MULTI, rd); | |
935 | if (err < 0) | |
3e61aa8f | 936 | goto out; |
3e61aa8f | 937 | skip: |
07a51cd3 AW |
938 | ++idx; |
939 | } | |
d342894c | 940 | } |
941 | } | |
3e61aa8f | 942 | out: |
d342894c | 943 | return idx; |
944 | } | |
945 | ||
946 | /* Watch incoming packets to learn mapping between Ethernet address | |
947 | * and Tunnel endpoint. | |
c4b49512 | 948 | * Return true if packet is bogus and should be dropped. |
d342894c | 949 | */ |
26a41ae6 | 950 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 951 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 952 | { |
953 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
954 | struct vxlan_fdb *f; | |
d342894c | 955 | |
956 | f = vxlan_find_mac(vxlan, src_mac); | |
957 | if (likely(f)) { | |
5ca5461c | 958 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 959 | |
e4c7ed41 | 960 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 961 | return false; |
962 | ||
963 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 964 | if (f->state & NUD_NOARP) |
26a41ae6 | 965 | return true; |
d342894c | 966 | |
967 | if (net_ratelimit()) | |
968 | netdev_info(dev, | |
e4c7ed41 | 969 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 970 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 971 | |
e4c7ed41 | 972 | rdst->remote_ip = *src_ip; |
d342894c | 973 | f->updated = jiffies; |
9e4b93f9 | 974 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 975 | } else { |
976 | /* learned new entry */ | |
977 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 978 | |
979 | /* close off race between vxlan_flush and incoming packets */ | |
980 | if (netif_running(dev)) | |
981 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
982 | NUD_REACHABLE, | |
983 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 984 | vxlan->cfg.dst_port, |
3bf74b1a | 985 | vxlan->default_dst.remote_vni, |
986 | 0, NTF_SELF); | |
d342894c | 987 | spin_unlock(&vxlan->hash_lock); |
988 | } | |
26a41ae6 | 989 | |
990 | return false; | |
d342894c | 991 | } |
992 | ||
d342894c | 993 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 994 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 995 | { |
553675fb | 996 | struct vxlan_dev *vxlan; |
d342894c | 997 | |
95ab0991 G |
998 | /* The vxlan_sock is only used by dev, leaving group has |
999 | * no effect on other vxlan devices. | |
1000 | */ | |
1001 | if (atomic_read(&dev->vn_sock->refcnt) == 1) | |
1002 | return false; | |
1003 | ||
553675fb | 1004 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1005 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1006 | continue; |
d342894c | 1007 | |
95ab0991 G |
1008 | if (vxlan->vn_sock != dev->vn_sock) |
1009 | continue; | |
1010 | ||
1011 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1012 | &dev->default_dst.remote_ip)) | |
1013 | continue; | |
1014 | ||
1015 | if (vxlan->default_dst.remote_ifindex != | |
1016 | dev->default_dst.remote_ifindex) | |
1017 | continue; | |
1018 | ||
1019 | return true; | |
553675fb | 1020 | } |
d342894c | 1021 | |
1022 | return false; | |
1023 | } | |
1024 | ||
614732ea | 1025 | static void vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 1026 | { |
53cf5275 JG |
1027 | struct sock *sk = vs->sock->sk; |
1028 | struct net *net = sock_net(sk); | |
1029 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
012a5729 | 1030 | |
7c47cedf SH |
1031 | if (!atomic_dec_and_test(&vs->refcnt)) |
1032 | return; | |
d342894c | 1033 | |
1c51a915 | 1034 | spin_lock(&vn->sock_lock); |
7c47cedf | 1035 | hlist_del_rcu(&vs->hlist); |
dc01e7d3 | 1036 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1037 | spin_unlock(&vn->sock_lock); |
1038 | ||
7c47cedf | 1039 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 1040 | } |
1041 | ||
56ef9c90 | 1042 | /* Update multicast group membership when first VNI on |
c4b49512 | 1043 | * multicast address is brought up |
7c47cedf | 1044 | */ |
56ef9c90 | 1045 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1046 | { |
7c47cedf SH |
1047 | struct vxlan_sock *vs = vxlan->vn_sock; |
1048 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1049 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1050 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1051 | int ret = -EINVAL; |
d342894c | 1052 | |
d342894c | 1053 | lock_sock(sk); |
e4c7ed41 CW |
1054 | if (ip->sa.sa_family == AF_INET) { |
1055 | struct ip_mreqn mreq = { | |
1056 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1057 | .imr_ifindex = ifindex, | |
1058 | }; | |
1059 | ||
56ef9c90 | 1060 | ret = ip_mc_join_group(sk, &mreq); |
e4c7ed41 CW |
1061 | #if IS_ENABLED(CONFIG_IPV6) |
1062 | } else { | |
56ef9c90 MRL |
1063 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1064 | &ip->sin6.sin6_addr); | |
e4c7ed41 CW |
1065 | #endif |
1066 | } | |
3fc2de2f | 1067 | release_sock(sk); |
1068 | ||
56ef9c90 | 1069 | return ret; |
3fc2de2f | 1070 | } |
1071 | ||
1072 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1073 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1074 | { |
3fc2de2f | 1075 | struct vxlan_sock *vs = vxlan->vn_sock; |
1076 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1077 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1078 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1079 | int ret = -EINVAL; |
3fc2de2f | 1080 | |
1081 | lock_sock(sk); | |
e4c7ed41 CW |
1082 | if (ip->sa.sa_family == AF_INET) { |
1083 | struct ip_mreqn mreq = { | |
1084 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1085 | .imr_ifindex = ifindex, | |
1086 | }; | |
1087 | ||
56ef9c90 | 1088 | ret = ip_mc_leave_group(sk, &mreq); |
e4c7ed41 CW |
1089 | #if IS_ENABLED(CONFIG_IPV6) |
1090 | } else { | |
56ef9c90 MRL |
1091 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1092 | &ip->sin6.sin6_addr); | |
e4c7ed41 CW |
1093 | #endif |
1094 | } | |
d342894c | 1095 | release_sock(sk); |
d342894c | 1096 | |
56ef9c90 | 1097 | return ret; |
d342894c | 1098 | } |
1099 | ||
dfd8645e | 1100 | static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh, |
0ace2ca8 | 1101 | size_t hdrlen, u32 data, bool nopartial) |
dfd8645e TH |
1102 | { |
1103 | size_t start, offset, plen; | |
dfd8645e | 1104 | |
b7fe10e5 TH |
1105 | if (skb->remcsum_offload) |
1106 | return vh; | |
1107 | ||
dfd8645e TH |
1108 | start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; |
1109 | offset = start + ((data & VXLAN_RCO_UDP) ? | |
1110 | offsetof(struct udphdr, check) : | |
1111 | offsetof(struct tcphdr, check)); | |
1112 | ||
1113 | plen = hdrlen + offset + sizeof(u16); | |
1114 | ||
1115 | if (!pskb_may_pull(skb, plen)) | |
1116 | return NULL; | |
1117 | ||
1118 | vh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
1119 | ||
0ace2ca8 TH |
1120 | skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset, |
1121 | nopartial); | |
dfd8645e TH |
1122 | |
1123 | return vh; | |
1124 | } | |
1125 | ||
614732ea TG |
1126 | static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb, |
1127 | struct vxlan_metadata *md, u32 vni, | |
1128 | struct metadata_dst *tun_dst) | |
1129 | { | |
1130 | struct iphdr *oip = NULL; | |
1131 | struct ipv6hdr *oip6 = NULL; | |
1132 | struct vxlan_dev *vxlan; | |
1133 | struct pcpu_sw_netstats *stats; | |
1134 | union vxlan_addr saddr; | |
1135 | int err = 0; | |
1136 | union vxlan_addr *remote_ip; | |
1137 | ||
1138 | /* For flow based devices, map all packets to VNI 0 */ | |
da8b43c0 | 1139 | if (vs->flags & VXLAN_F_COLLECT_METADATA) |
614732ea TG |
1140 | vni = 0; |
1141 | ||
1142 | /* Is this VNI defined? */ | |
1143 | vxlan = vxlan_vs_find_vni(vs, vni); | |
1144 | if (!vxlan) | |
1145 | goto drop; | |
1146 | ||
1147 | remote_ip = &vxlan->default_dst.remote_ip; | |
1148 | skb_reset_mac_header(skb); | |
1149 | skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev))); | |
1150 | skb->protocol = eth_type_trans(skb, vxlan->dev); | |
1151 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1152 | ||
1153 | /* Ignore packet loops (and multicast echo) */ | |
1154 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1155 | goto drop; | |
1156 | ||
1157 | /* Re-examine inner Ethernet packet */ | |
1158 | if (remote_ip->sa.sa_family == AF_INET) { | |
1159 | oip = ip_hdr(skb); | |
1160 | saddr.sin.sin_addr.s_addr = oip->saddr; | |
1161 | saddr.sa.sa_family = AF_INET; | |
1162 | #if IS_ENABLED(CONFIG_IPV6) | |
1163 | } else { | |
1164 | oip6 = ipv6_hdr(skb); | |
1165 | saddr.sin6.sin6_addr = oip6->saddr; | |
1166 | saddr.sa.sa_family = AF_INET6; | |
1167 | #endif | |
1168 | } | |
1169 | ||
1170 | if (tun_dst) { | |
1171 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
1172 | tun_dst = NULL; | |
1173 | } | |
1174 | ||
1175 | if ((vxlan->flags & VXLAN_F_LEARN) && | |
1176 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) | |
1177 | goto drop; | |
1178 | ||
1179 | skb_reset_network_header(skb); | |
1180 | /* In flow-based mode, GBP is carried in dst_metadata */ | |
da8b43c0 | 1181 | if (!(vs->flags & VXLAN_F_COLLECT_METADATA)) |
614732ea TG |
1182 | skb->mark = md->gbp; |
1183 | ||
1184 | if (oip6) | |
1185 | err = IP6_ECN_decapsulate(oip6, skb); | |
1186 | if (oip) | |
1187 | err = IP_ECN_decapsulate(oip, skb); | |
1188 | ||
1189 | if (unlikely(err)) { | |
1190 | if (log_ecn_error) { | |
1191 | if (oip6) | |
1192 | net_info_ratelimited("non-ECT from %pI6\n", | |
1193 | &oip6->saddr); | |
1194 | if (oip) | |
1195 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1196 | &oip->saddr, oip->tos); | |
1197 | } | |
1198 | if (err > 1) { | |
1199 | ++vxlan->dev->stats.rx_frame_errors; | |
1200 | ++vxlan->dev->stats.rx_errors; | |
1201 | goto drop; | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | stats = this_cpu_ptr(vxlan->dev->tstats); | |
1206 | u64_stats_update_begin(&stats->syncp); | |
1207 | stats->rx_packets++; | |
1208 | stats->rx_bytes += skb->len; | |
1209 | u64_stats_update_end(&stats->syncp); | |
1210 | ||
58ce31cc | 1211 | gro_cells_receive(&vxlan->gro_cells, skb); |
614732ea TG |
1212 | |
1213 | return; | |
1214 | drop: | |
1215 | if (tun_dst) | |
1216 | dst_release((struct dst_entry *)tun_dst); | |
1217 | ||
1218 | /* Consume bad packet */ | |
1219 | kfree_skb(skb); | |
1220 | } | |
1221 | ||
d342894c | 1222 | /* Callback from net/ipv4/udp.c to receive packets */ |
1223 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
1224 | { | |
ee122c79 | 1225 | struct metadata_dst *tun_dst = NULL; |
5cfccc5a | 1226 | struct vxlan_sock *vs; |
d342894c | 1227 | struct vxlanhdr *vxh; |
3bf39475 | 1228 | u32 flags, vni; |
ee122c79 TG |
1229 | struct vxlan_metadata _md; |
1230 | struct vxlan_metadata *md = &_md; | |
d342894c | 1231 | |
d342894c | 1232 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1233 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 1234 | goto error; |
1235 | ||
7ce04758 | 1236 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); |
3bf39475 TH |
1237 | flags = ntohl(vxh->vx_flags); |
1238 | vni = ntohl(vxh->vx_vni); | |
1239 | ||
1240 | if (flags & VXLAN_HF_VNI) { | |
1241 | flags &= ~VXLAN_HF_VNI; | |
1242 | } else { | |
1243 | /* VNI flag always required to be set */ | |
1244 | goto bad_flags; | |
d342894c | 1245 | } |
1246 | ||
5cfccc5a PS |
1247 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
1248 | goto drop; | |
dfd8645e | 1249 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); |
5cfccc5a | 1250 | |
559835ea | 1251 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1252 | if (!vs) |
d342894c | 1253 | goto drop; |
d342894c | 1254 | |
dfd8645e | 1255 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { |
0ace2ca8 TH |
1256 | vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni, |
1257 | !!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
1258 | if (!vxh) |
1259 | goto drop; | |
1260 | ||
1261 | flags &= ~VXLAN_HF_RCO; | |
40fb70f3 | 1262 | vni &= VXLAN_VNI_MASK; |
dfd8645e TH |
1263 | } |
1264 | ||
ee122c79 | 1265 | if (vxlan_collect_metadata(vs)) { |
c29a70d2 PS |
1266 | tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
1267 | cpu_to_be64(vni >> 8), sizeof(*md)); | |
1268 | ||
ee122c79 TG |
1269 | if (!tun_dst) |
1270 | goto drop; | |
1271 | ||
0f1b7354 | 1272 | md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
ee122c79 TG |
1273 | } else { |
1274 | memset(md, 0, sizeof(*md)); | |
1275 | } | |
1276 | ||
3511494c TG |
1277 | /* For backwards compatibility, only allow reserved fields to be |
1278 | * used by VXLAN extensions if explicitly requested. | |
1279 | */ | |
1280 | if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) { | |
1281 | struct vxlanhdr_gbp *gbp; | |
1282 | ||
1283 | gbp = (struct vxlanhdr_gbp *)vxh; | |
ee122c79 TG |
1284 | md->gbp = ntohs(gbp->policy_id); |
1285 | ||
1286 | if (tun_dst) | |
0f1b7354 | 1287 | tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
3511494c TG |
1288 | |
1289 | if (gbp->dont_learn) | |
ee122c79 | 1290 | md->gbp |= VXLAN_GBP_DONT_LEARN; |
3511494c TG |
1291 | |
1292 | if (gbp->policy_applied) | |
ee122c79 | 1293 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; |
3511494c TG |
1294 | |
1295 | flags &= ~VXLAN_GBP_USED_BITS; | |
1296 | } | |
1297 | ||
40fb70f3 | 1298 | if (flags || vni & ~VXLAN_VNI_MASK) { |
3bf39475 TH |
1299 | /* If there are any unprocessed flags remaining treat |
1300 | * this as a malformed packet. This behavior diverges from | |
1301 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1302 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1303 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1304 | * is more robust and provides a little more security in |
1305 | * adding extensions to VXLAN. | |
1306 | */ | |
1307 | ||
1308 | goto bad_flags; | |
1309 | } | |
1310 | ||
614732ea | 1311 | vxlan_rcv(vs, skb, md, vni >> 8, tun_dst); |
5cfccc5a PS |
1312 | return 0; |
1313 | ||
1314 | drop: | |
1315 | /* Consume bad packet */ | |
1316 | kfree_skb(skb); | |
1317 | return 0; | |
1318 | ||
3bf39475 TH |
1319 | bad_flags: |
1320 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1321 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
1322 | ||
5cfccc5a | 1323 | error: |
ee122c79 TG |
1324 | if (tun_dst) |
1325 | dst_release((struct dst_entry *)tun_dst); | |
1326 | ||
5cfccc5a PS |
1327 | /* Return non vxlan pkt */ |
1328 | return 1; | |
1329 | } | |
1330 | ||
e4f67add DS |
1331 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1332 | { | |
1333 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1334 | struct arphdr *parp; | |
1335 | u8 *arpptr, *sha; | |
1336 | __be32 sip, tip; | |
1337 | struct neighbour *n; | |
1338 | ||
1339 | if (dev->flags & IFF_NOARP) | |
1340 | goto out; | |
1341 | ||
1342 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1343 | dev->stats.tx_dropped++; | |
1344 | goto out; | |
1345 | } | |
1346 | parp = arp_hdr(skb); | |
1347 | ||
1348 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1349 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1350 | parp->ar_pro != htons(ETH_P_IP) || | |
1351 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1352 | parp->ar_hln != dev->addr_len || | |
1353 | parp->ar_pln != 4) | |
1354 | goto out; | |
1355 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1356 | sha = arpptr; | |
1357 | arpptr += dev->addr_len; /* sha */ | |
1358 | memcpy(&sip, arpptr, sizeof(sip)); | |
1359 | arpptr += sizeof(sip); | |
1360 | arpptr += dev->addr_len; /* tha */ | |
1361 | memcpy(&tip, arpptr, sizeof(tip)); | |
1362 | ||
1363 | if (ipv4_is_loopback(tip) || | |
1364 | ipv4_is_multicast(tip)) | |
1365 | goto out; | |
1366 | ||
1367 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1368 | ||
1369 | if (n) { | |
e4f67add DS |
1370 | struct vxlan_fdb *f; |
1371 | struct sk_buff *reply; | |
1372 | ||
1373 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1374 | neigh_release(n); | |
1375 | goto out; | |
1376 | } | |
1377 | ||
1378 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1379 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1380 | /* bridge-local neighbor */ |
1381 | neigh_release(n); | |
1382 | goto out; | |
1383 | } | |
1384 | ||
1385 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1386 | n->ha, sha); | |
1387 | ||
1388 | neigh_release(n); | |
1389 | ||
7346135d DS |
1390 | if (reply == NULL) |
1391 | goto out; | |
1392 | ||
e4f67add DS |
1393 | skb_reset_mac_header(reply); |
1394 | __skb_pull(reply, skb_network_offset(reply)); | |
1395 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1396 | reply->pkt_type = PACKET_HOST; | |
1397 | ||
1398 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1399 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1400 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1401 | union vxlan_addr ipa = { | |
1402 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1403 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1404 | }; |
1405 | ||
1406 | vxlan_ip_miss(dev, &ipa); | |
1407 | } | |
e4f67add DS |
1408 | out: |
1409 | consume_skb(skb); | |
1410 | return NETDEV_TX_OK; | |
1411 | } | |
1412 | ||
f564f45c | 1413 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1414 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1415 | struct neighbour *n, bool isrouter) | |
1416 | { | |
1417 | struct net_device *dev = request->dev; | |
1418 | struct sk_buff *reply; | |
1419 | struct nd_msg *ns, *na; | |
1420 | struct ipv6hdr *pip6; | |
1421 | u8 *daddr; | |
1422 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1423 | int ns_olen; | |
1424 | int i, len; | |
1425 | ||
1426 | if (dev == NULL) | |
1427 | return NULL; | |
1428 | ||
1429 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1430 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1431 | reply = alloc_skb(len, GFP_ATOMIC); | |
1432 | if (reply == NULL) | |
1433 | return NULL; | |
1434 | ||
1435 | reply->protocol = htons(ETH_P_IPV6); | |
1436 | reply->dev = dev; | |
1437 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1438 | skb_push(reply, sizeof(struct ethhdr)); | |
1439 | skb_set_mac_header(reply, 0); | |
1440 | ||
1441 | ns = (struct nd_msg *)skb_transport_header(request); | |
1442 | ||
1443 | daddr = eth_hdr(request)->h_source; | |
1444 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1445 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1446 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1447 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1448 | break; | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | /* Ethernet header */ | |
1453 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1454 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1455 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1456 | reply->protocol = htons(ETH_P_IPV6); | |
1457 | ||
1458 | skb_pull(reply, sizeof(struct ethhdr)); | |
1459 | skb_set_network_header(reply, 0); | |
1460 | skb_put(reply, sizeof(struct ipv6hdr)); | |
1461 | ||
1462 | /* IPv6 header */ | |
1463 | ||
1464 | pip6 = ipv6_hdr(reply); | |
1465 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1466 | pip6->version = 6; | |
1467 | pip6->priority = ipv6_hdr(request)->priority; | |
1468 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1469 | pip6->hop_limit = 255; | |
1470 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1471 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1472 | ||
1473 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
1474 | skb_set_transport_header(reply, 0); | |
1475 | ||
1476 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1477 | ||
1478 | /* Neighbor Advertisement */ | |
1479 | memset(na, 0, sizeof(*na)+na_olen); | |
1480 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1481 | na->icmph.icmp6_router = isrouter; | |
1482 | na->icmph.icmp6_override = 1; | |
1483 | na->icmph.icmp6_solicited = 1; | |
1484 | na->target = ns->target; | |
1485 | ether_addr_copy(&na->opt[2], n->ha); | |
1486 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1487 | na->opt[1] = na_olen >> 3; | |
1488 | ||
1489 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1490 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1491 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1492 | ||
1493 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1494 | ||
1495 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1496 | ||
1497 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1498 | ||
1499 | return reply; | |
1500 | } | |
1501 | ||
f564f45c CW |
1502 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1503 | { | |
1504 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1505 | struct nd_msg *msg; |
f564f45c CW |
1506 | const struct ipv6hdr *iphdr; |
1507 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1508 | struct neighbour *n; |
1509 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1510 | |
1511 | in6_dev = __in6_dev_get(dev); | |
1512 | if (!in6_dev) | |
1513 | goto out; | |
1514 | ||
f564f45c CW |
1515 | iphdr = ipv6_hdr(skb); |
1516 | saddr = &iphdr->saddr; | |
1517 | daddr = &iphdr->daddr; | |
1518 | ||
f564f45c CW |
1519 | msg = (struct nd_msg *)skb_transport_header(skb); |
1520 | if (msg->icmph.icmp6_code != 0 || | |
1521 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1522 | goto out; | |
1523 | ||
4b29dba9 DS |
1524 | if (ipv6_addr_loopback(daddr) || |
1525 | ipv6_addr_is_multicast(&msg->target)) | |
1526 | goto out; | |
1527 | ||
1528 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1529 | |
1530 | if (n) { | |
1531 | struct vxlan_fdb *f; | |
4b29dba9 | 1532 | struct sk_buff *reply; |
f564f45c CW |
1533 | |
1534 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1535 | neigh_release(n); | |
1536 | goto out; | |
1537 | } | |
1538 | ||
1539 | f = vxlan_find_mac(vxlan, n->ha); | |
1540 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1541 | /* bridge-local neighbor */ | |
1542 | neigh_release(n); | |
1543 | goto out; | |
1544 | } | |
1545 | ||
4b29dba9 DS |
1546 | reply = vxlan_na_create(skb, n, |
1547 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1548 | ||
f564f45c | 1549 | neigh_release(n); |
4b29dba9 DS |
1550 | |
1551 | if (reply == NULL) | |
1552 | goto out; | |
1553 | ||
1554 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1555 | dev->stats.rx_dropped++; | |
1556 | ||
f564f45c | 1557 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1558 | union vxlan_addr ipa = { |
1559 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1560 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1561 | }; |
1562 | ||
f564f45c CW |
1563 | vxlan_ip_miss(dev, &ipa); |
1564 | } | |
1565 | ||
1566 | out: | |
1567 | consume_skb(skb); | |
1568 | return NETDEV_TX_OK; | |
1569 | } | |
1570 | #endif | |
1571 | ||
e4f67add DS |
1572 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1573 | { | |
1574 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1575 | struct neighbour *n; | |
e4f67add DS |
1576 | |
1577 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1578 | return false; | |
1579 | ||
1580 | n = NULL; | |
1581 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1582 | case ETH_P_IP: | |
e15a00aa CW |
1583 | { |
1584 | struct iphdr *pip; | |
1585 | ||
e4f67add DS |
1586 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1587 | return false; | |
1588 | pip = ip_hdr(skb); | |
1589 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1590 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1591 | union vxlan_addr ipa = { | |
1592 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 1593 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1594 | }; |
1595 | ||
1596 | vxlan_ip_miss(dev, &ipa); | |
1597 | return false; | |
1598 | } | |
1599 | ||
e4f67add | 1600 | break; |
e15a00aa CW |
1601 | } |
1602 | #if IS_ENABLED(CONFIG_IPV6) | |
1603 | case ETH_P_IPV6: | |
1604 | { | |
1605 | struct ipv6hdr *pip6; | |
1606 | ||
1607 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1608 | return false; | |
1609 | pip6 = ipv6_hdr(skb); | |
1610 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1611 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1612 | union vxlan_addr ipa = { | |
1613 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 1614 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
1615 | }; |
1616 | ||
1617 | vxlan_ip_miss(dev, &ipa); | |
1618 | return false; | |
1619 | } | |
1620 | ||
1621 | break; | |
1622 | } | |
1623 | #endif | |
e4f67add DS |
1624 | default: |
1625 | return false; | |
1626 | } | |
1627 | ||
1628 | if (n) { | |
1629 | bool diff; | |
1630 | ||
7367d0b5 | 1631 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1632 | if (diff) { |
1633 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1634 | dev->addr_len); | |
1635 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1636 | } | |
1637 | neigh_release(n); | |
1638 | return diff; | |
e4c7ed41 CW |
1639 | } |
1640 | ||
e4f67add DS |
1641 | return false; |
1642 | } | |
1643 | ||
af33c1ad | 1644 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
1645 | struct vxlan_metadata *md) |
1646 | { | |
1647 | struct vxlanhdr_gbp *gbp; | |
1648 | ||
db79a621 TG |
1649 | if (!md->gbp) |
1650 | return; | |
1651 | ||
3511494c TG |
1652 | gbp = (struct vxlanhdr_gbp *)vxh; |
1653 | vxh->vx_flags |= htonl(VXLAN_HF_GBP); | |
1654 | ||
1655 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
1656 | gbp->dont_learn = 1; | |
1657 | ||
1658 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
1659 | gbp->policy_applied = 1; | |
1660 | ||
1661 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
1662 | } | |
1663 | ||
e4c7ed41 | 1664 | #if IS_ENABLED(CONFIG_IPV6) |
79b16aad DM |
1665 | static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
1666 | struct sk_buff *skb, | |
e4c7ed41 CW |
1667 | struct net_device *dev, struct in6_addr *saddr, |
1668 | struct in6_addr *daddr, __u8 prio, __u8 ttl, | |
6b6948dd | 1669 | __be16 src_port, __be16 dst_port, __be32 vni, |
af33c1ad | 1670 | struct vxlan_metadata *md, bool xnet, u32 vxflags) |
e4c7ed41 | 1671 | { |
e4c7ed41 | 1672 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
1673 | int min_headroom; |
1674 | int err; | |
af33c1ad | 1675 | bool udp_sum = !(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX); |
dfd8645e TH |
1676 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1677 | u16 hdrlen = sizeof(struct vxlanhdr); | |
1678 | ||
af33c1ad | 1679 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1680 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1681 | int csum_start = skb_checksum_start_offset(skb); | |
1682 | ||
1683 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1684 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1685 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
1686 | skb->csum_offset == offsetof(struct tcphdr, check))) { | |
1687 | udp_sum = false; | |
1688 | type |= SKB_GSO_TUNNEL_REMCSUM; | |
1689 | } | |
1690 | } | |
e4c7ed41 | 1691 | |
f01ec1c0 | 1692 | skb_scrub_packet(skb, xnet); |
963a88b3 | 1693 | |
e4c7ed41 CW |
1694 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
1695 | + VXLAN_HLEN + sizeof(struct ipv6hdr) | |
df8a39de | 1696 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
e4c7ed41 CW |
1697 | |
1698 | /* Need space for new headers (invalidates iph ptr) */ | |
1699 | err = skb_cow_head(skb, min_headroom); | |
74f47278 PS |
1700 | if (unlikely(err)) { |
1701 | kfree_skb(skb); | |
1702 | goto err; | |
1703 | } | |
e4c7ed41 | 1704 | |
5968250c | 1705 | skb = vlan_hwaccel_push_inside(skb); |
74f47278 PS |
1706 | if (WARN_ON(!skb)) { |
1707 | err = -ENOMEM; | |
1708 | goto err; | |
1709 | } | |
e4c7ed41 | 1710 | |
b736a623 JG |
1711 | skb = iptunnel_handle_offloads(skb, udp_sum, type); |
1712 | if (IS_ERR(skb)) { | |
1713 | err = -EINVAL; | |
1714 | goto err; | |
1715 | } | |
1716 | ||
e4c7ed41 | 1717 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
3bf39475 | 1718 | vxh->vx_flags = htonl(VXLAN_HF_VNI); |
614732ea | 1719 | vxh->vx_vni = vni; |
e4c7ed41 | 1720 | |
dfd8645e TH |
1721 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
1722 | u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> | |
1723 | VXLAN_RCO_SHIFT; | |
1724 | ||
1725 | if (skb->csum_offset == offsetof(struct udphdr, check)) | |
1726 | data |= VXLAN_RCO_UDP; | |
1727 | ||
1728 | vxh->vx_vni |= htonl(data); | |
1729 | vxh->vx_flags |= htonl(VXLAN_HF_RCO); | |
1730 | ||
1731 | if (!skb_is_gso(skb)) { | |
1732 | skb->ip_summed = CHECKSUM_NONE; | |
1733 | skb->encapsulation = 0; | |
1734 | } | |
1735 | } | |
1736 | ||
af33c1ad TH |
1737 | if (vxflags & VXLAN_F_GBP) |
1738 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
3511494c | 1739 | |
996c9fd1 TH |
1740 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
1741 | ||
79b16aad | 1742 | udp_tunnel6_xmit_skb(dst, sk, skb, dev, saddr, daddr, prio, |
d998f8ef | 1743 | ttl, src_port, dst_port, |
af33c1ad | 1744 | !!(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX)); |
e4c7ed41 | 1745 | return 0; |
74f47278 PS |
1746 | err: |
1747 | dst_release(dst); | |
1748 | return err; | |
e4c7ed41 CW |
1749 | } |
1750 | #endif | |
1751 | ||
614732ea TG |
1752 | static int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, |
1753 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, | |
6b6948dd | 1754 | __be16 src_port, __be16 dst_port, __be32 vni, |
614732ea | 1755 | struct vxlan_metadata *md, bool xnet, u32 vxflags) |
49560532 PS |
1756 | { |
1757 | struct vxlanhdr *vxh; | |
649c5b8b | 1758 | int min_headroom; |
49560532 | 1759 | int err; |
af33c1ad | 1760 | bool udp_sum = !!(vxflags & VXLAN_F_UDP_CSUM); |
dfd8645e TH |
1761 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1762 | u16 hdrlen = sizeof(struct vxlanhdr); | |
1763 | ||
af33c1ad | 1764 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1765 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1766 | int csum_start = skb_checksum_start_offset(skb); | |
1767 | ||
1768 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1769 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1770 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
1771 | skb->csum_offset == offsetof(struct tcphdr, check))) { | |
1772 | udp_sum = false; | |
1773 | type |= SKB_GSO_TUNNEL_REMCSUM; | |
1774 | } | |
1775 | } | |
49560532 | 1776 | |
649c5b8b | 1777 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 | 1778 | + VXLAN_HLEN + sizeof(struct iphdr) |
df8a39de | 1779 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
649c5b8b PS |
1780 | |
1781 | /* Need space for new headers (invalidates iph ptr) */ | |
1782 | err = skb_cow_head(skb, min_headroom); | |
74f47278 PS |
1783 | if (unlikely(err)) { |
1784 | kfree_skb(skb); | |
649c5b8b | 1785 | return err; |
74f47278 | 1786 | } |
649c5b8b | 1787 | |
5968250c JP |
1788 | skb = vlan_hwaccel_push_inside(skb); |
1789 | if (WARN_ON(!skb)) | |
1790 | return -ENOMEM; | |
1eaa8178 | 1791 | |
b736a623 JG |
1792 | skb = iptunnel_handle_offloads(skb, udp_sum, type); |
1793 | if (IS_ERR(skb)) | |
1794 | return PTR_ERR(skb); | |
1795 | ||
49560532 | 1796 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
3bf39475 | 1797 | vxh->vx_flags = htonl(VXLAN_HF_VNI); |
614732ea | 1798 | vxh->vx_vni = vni; |
49560532 | 1799 | |
dfd8645e TH |
1800 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
1801 | u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> | |
1802 | VXLAN_RCO_SHIFT; | |
1803 | ||
1804 | if (skb->csum_offset == offsetof(struct udphdr, check)) | |
1805 | data |= VXLAN_RCO_UDP; | |
1806 | ||
1807 | vxh->vx_vni |= htonl(data); | |
1808 | vxh->vx_flags |= htonl(VXLAN_HF_RCO); | |
1809 | ||
1810 | if (!skb_is_gso(skb)) { | |
1811 | skb->ip_summed = CHECKSUM_NONE; | |
1812 | skb->encapsulation = 0; | |
1813 | } | |
1814 | } | |
1815 | ||
af33c1ad TH |
1816 | if (vxflags & VXLAN_F_GBP) |
1817 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
3511494c | 1818 | |
996c9fd1 TH |
1819 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
1820 | ||
79b16aad | 1821 | return udp_tunnel_xmit_skb(rt, sk, skb, src, dst, tos, |
d998f8ef | 1822 | ttl, df, src_port, dst_port, xnet, |
af33c1ad | 1823 | !(vxflags & VXLAN_F_UDP_CSUM)); |
49560532 | 1824 | } |
49560532 | 1825 | |
9dcc71e1 SS |
1826 | /* Bypass encapsulation if the destination is local */ |
1827 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1828 | struct vxlan_dev *dst_vxlan) | |
1829 | { | |
8f84985f | 1830 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1831 | union vxlan_addr loopback; |
1832 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
1833 | struct net_device *dev = skb->dev; |
1834 | int len = skb->len; | |
9dcc71e1 | 1835 | |
8f84985f LR |
1836 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1837 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1838 | skb->pkt_type = PACKET_HOST; |
1839 | skb->encapsulation = 0; | |
1840 | skb->dev = dst_vxlan->dev; | |
1841 | __skb_pull(skb, skb_network_offset(skb)); | |
1842 | ||
e4c7ed41 CW |
1843 | if (remote_ip->sa.sa_family == AF_INET) { |
1844 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1845 | loopback.sa.sa_family = AF_INET; | |
1846 | #if IS_ENABLED(CONFIG_IPV6) | |
1847 | } else { | |
1848 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1849 | loopback.sa.sa_family = AF_INET6; | |
1850 | #endif | |
1851 | } | |
1852 | ||
9dcc71e1 | 1853 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1854 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1855 | |
1856 | u64_stats_update_begin(&tx_stats->syncp); | |
1857 | tx_stats->tx_packets++; | |
ce6502a8 | 1858 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
1859 | u64_stats_update_end(&tx_stats->syncp); |
1860 | ||
1861 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1862 | u64_stats_update_begin(&rx_stats->syncp); | |
1863 | rx_stats->rx_packets++; | |
ce6502a8 | 1864 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
1865 | u64_stats_update_end(&rx_stats->syncp); |
1866 | } else { | |
ce6502a8 | 1867 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
1868 | } |
1869 | } | |
1870 | ||
4ad16930 SH |
1871 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1872 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1873 | { |
3093fbe7 | 1874 | struct ip_tunnel_info *info; |
d342894c | 1875 | struct vxlan_dev *vxlan = netdev_priv(dev); |
79b16aad | 1876 | struct sock *sk = vxlan->vn_sock->sock->sk; |
a725e514 | 1877 | unsigned short family = vxlan_get_sk_family(vxlan->vn_sock); |
e4c7ed41 | 1878 | struct rtable *rt = NULL; |
d342894c | 1879 | const struct iphdr *old_iph; |
d342894c | 1880 | struct flowi4 fl4; |
e4c7ed41 | 1881 | union vxlan_addr *dst; |
ee122c79 TG |
1882 | union vxlan_addr remote_ip; |
1883 | struct vxlan_metadata _md; | |
1884 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 1885 | __be16 src_port = 0, dst_port; |
234f5b73 | 1886 | u32 vni; |
d342894c | 1887 | __be16 df = 0; |
1888 | __u8 tos, ttl; | |
0e6fbc5b | 1889 | int err; |
ee122c79 | 1890 | u32 flags = vxlan->flags; |
d342894c | 1891 | |
61adedf3 | 1892 | info = skb_tunnel_info(skb); |
3093fbe7 | 1893 | |
ee122c79 | 1894 | if (rdst) { |
0dfbdf41 | 1895 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
ee122c79 TG |
1896 | vni = rdst->remote_vni; |
1897 | dst = &rdst->remote_ip; | |
1898 | } else { | |
1899 | if (!info) { | |
1900 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
1901 | dev->name); | |
1902 | goto drop; | |
1903 | } | |
7f9562a1 JB |
1904 | if (family != ip_tunnel_info_af(info)) |
1905 | goto drop; | |
ee122c79 | 1906 | |
0dfbdf41 | 1907 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
ee122c79 | 1908 | vni = be64_to_cpu(info->key.tun_id); |
a725e514 JB |
1909 | remote_ip.sa.sa_family = family; |
1910 | if (family == AF_INET) | |
1911 | remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; | |
1912 | else | |
1913 | remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; | |
ee122c79 TG |
1914 | dst = &remote_ip; |
1915 | } | |
e4f67add | 1916 | |
e4c7ed41 | 1917 | if (vxlan_addr_any(dst)) { |
e4f67add | 1918 | if (did_rsc) { |
e4f67add | 1919 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1920 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1921 | return; |
e4f67add | 1922 | } |
ef59febe | 1923 | goto drop; |
e4f67add | 1924 | } |
ef59febe | 1925 | |
d342894c | 1926 | old_iph = ip_hdr(skb); |
1927 | ||
0dfbdf41 | 1928 | ttl = vxlan->cfg.ttl; |
e4c7ed41 | 1929 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1930 | ttl = 1; |
1931 | ||
0dfbdf41 | 1932 | tos = vxlan->cfg.tos; |
d342894c | 1933 | if (tos == 1) |
206aaafc | 1934 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1935 | |
0dfbdf41 TG |
1936 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
1937 | vxlan->cfg.port_max, true); | |
d342894c | 1938 | |
a725e514 JB |
1939 | if (info) { |
1940 | if (info->key.tun_flags & TUNNEL_CSUM) | |
1941 | flags |= VXLAN_F_UDP_CSUM; | |
1942 | else | |
1943 | flags &= ~VXLAN_F_UDP_CSUM; | |
1944 | ||
1945 | ttl = info->key.ttl; | |
1946 | tos = info->key.tos; | |
1947 | ||
1948 | if (info->options_len) | |
4c222798 | 1949 | md = ip_tunnel_info_opts(info); |
a725e514 JB |
1950 | } else { |
1951 | md->gbp = skb->mark; | |
1952 | } | |
1953 | ||
e4c7ed41 | 1954 | if (dst->sa.sa_family == AF_INET) { |
a725e514 JB |
1955 | if (info && (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)) |
1956 | df = htons(IP_DF); | |
ee122c79 | 1957 | |
e4c7ed41 | 1958 | memset(&fl4, 0, sizeof(fl4)); |
ee122c79 | 1959 | fl4.flowi4_oif = rdst ? rdst->remote_ifindex : 0; |
e4c7ed41 | 1960 | fl4.flowi4_tos = RT_TOS(tos); |
239fb791 TG |
1961 | fl4.flowi4_mark = skb->mark; |
1962 | fl4.flowi4_proto = IPPROTO_UDP; | |
e4c7ed41 | 1963 | fl4.daddr = dst->sin.sin_addr.s_addr; |
0dfbdf41 | 1964 | fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr; |
e4c7ed41 | 1965 | |
f01ec1c0 | 1966 | rt = ip_route_output_key(vxlan->net, &fl4); |
e4c7ed41 CW |
1967 | if (IS_ERR(rt)) { |
1968 | netdev_dbg(dev, "no route to %pI4\n", | |
1969 | &dst->sin.sin_addr.s_addr); | |
1970 | dev->stats.tx_carrier_errors++; | |
1971 | goto tx_error; | |
1972 | } | |
d342894c | 1973 | |
e4c7ed41 CW |
1974 | if (rt->dst.dev == dev) { |
1975 | netdev_dbg(dev, "circular route to %pI4\n", | |
1976 | &dst->sin.sin_addr.s_addr); | |
1977 | dev->stats.collisions++; | |
fffc15a5 | 1978 | goto rt_tx_error; |
e4c7ed41 CW |
1979 | } |
1980 | ||
1981 | /* Bypass encapsulation if the destination is local */ | |
1982 | if (rt->rt_flags & RTCF_LOCAL && | |
1983 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1984 | struct vxlan_dev *dst_vxlan; | |
1985 | ||
1986 | ip_rt_put(rt); | |
19ca9fc1 | 1987 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
1988 | dst->sa.sa_family, dst_port, |
1989 | vxlan->flags); | |
e4c7ed41 CW |
1990 | if (!dst_vxlan) |
1991 | goto tx_error; | |
1992 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1993 | return; | |
1994 | } | |
1995 | ||
1996 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); | |
1997 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
79b16aad | 1998 | err = vxlan_xmit_skb(rt, sk, skb, fl4.saddr, |
af33c1ad | 1999 | dst->sin.sin_addr.s_addr, tos, ttl, df, |
614732ea | 2000 | src_port, dst_port, htonl(vni << 8), md, |
af33c1ad | 2001 | !net_eq(vxlan->net, dev_net(vxlan->dev)), |
ee122c79 | 2002 | flags); |
74f47278 PS |
2003 | if (err < 0) { |
2004 | /* skb is already freed. */ | |
2005 | skb = NULL; | |
e4c7ed41 | 2006 | goto rt_tx_error; |
74f47278 PS |
2007 | } |
2008 | ||
e4c7ed41 CW |
2009 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); |
2010 | #if IS_ENABLED(CONFIG_IPV6) | |
2011 | } else { | |
e4c7ed41 CW |
2012 | struct dst_entry *ndst; |
2013 | struct flowi6 fl6; | |
6f264e47 | 2014 | u32 rt6i_flags; |
e4c7ed41 CW |
2015 | |
2016 | memset(&fl6, 0, sizeof(fl6)); | |
ee122c79 | 2017 | fl6.flowi6_oif = rdst ? rdst->remote_ifindex : 0; |
e4c7ed41 | 2018 | fl6.daddr = dst->sin6.sin6_addr; |
0dfbdf41 | 2019 | fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr; |
239fb791 | 2020 | fl6.flowi6_mark = skb->mark; |
8c1bb79f | 2021 | fl6.flowi6_proto = IPPROTO_UDP; |
e4c7ed41 | 2022 | |
343d60aa | 2023 | if (ipv6_stub->ipv6_dst_lookup(vxlan->net, sk, &ndst, &fl6)) { |
e4c7ed41 CW |
2024 | netdev_dbg(dev, "no route to %pI6\n", |
2025 | &dst->sin6.sin6_addr); | |
2026 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 2027 | goto tx_error; |
e4c7ed41 | 2028 | } |
d342894c | 2029 | |
e4c7ed41 CW |
2030 | if (ndst->dev == dev) { |
2031 | netdev_dbg(dev, "circular route to %pI6\n", | |
2032 | &dst->sin6.sin6_addr); | |
2033 | dst_release(ndst); | |
2034 | dev->stats.collisions++; | |
2035 | goto tx_error; | |
2036 | } | |
0e6fbc5b | 2037 | |
e4c7ed41 | 2038 | /* Bypass encapsulation if the destination is local */ |
6f264e47 JB |
2039 | rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; |
2040 | if (rt6i_flags & RTF_LOCAL && | |
2041 | !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
e4c7ed41 CW |
2042 | struct vxlan_dev *dst_vxlan; |
2043 | ||
2044 | dst_release(ndst); | |
19ca9fc1 | 2045 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
2046 | dst->sa.sa_family, dst_port, |
2047 | vxlan->flags); | |
e4c7ed41 CW |
2048 | if (!dst_vxlan) |
2049 | goto tx_error; | |
2050 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
2051 | return; | |
2052 | } | |
49560532 | 2053 | |
e4c7ed41 | 2054 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
79b16aad | 2055 | err = vxlan6_xmit_skb(ndst, sk, skb, dev, &fl6.saddr, &fl6.daddr, |
614732ea | 2056 | 0, ttl, src_port, dst_port, htonl(vni << 8), md, |
af33c1ad | 2057 | !net_eq(vxlan->net, dev_net(vxlan->dev)), |
a725e514 | 2058 | flags); |
e4c7ed41 CW |
2059 | #endif |
2060 | } | |
0e6fbc5b | 2061 | |
4ad16930 | 2062 | return; |
d342894c | 2063 | |
2064 | drop: | |
2065 | dev->stats.tx_dropped++; | |
2066 | goto tx_free; | |
2067 | ||
49560532 PS |
2068 | rt_tx_error: |
2069 | ip_rt_put(rt); | |
d342894c | 2070 | tx_error: |
2071 | dev->stats.tx_errors++; | |
2072 | tx_free: | |
2073 | dev_kfree_skb(skb); | |
d342894c | 2074 | } |
2075 | ||
6681712d DS |
2076 | /* Transmit local packets over Vxlan |
2077 | * | |
2078 | * Outer IP header inherits ECN and DF from inner header. | |
2079 | * Outer UDP destination is the VXLAN assigned port. | |
2080 | * source port is based on hash of flow | |
2081 | */ | |
2082 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2083 | { | |
2084 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3093fbe7 | 2085 | const struct ip_tunnel_info *info; |
6681712d DS |
2086 | struct ethhdr *eth; |
2087 | bool did_rsc = false; | |
8f646c92 | 2088 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 2089 | struct vxlan_fdb *f; |
6681712d | 2090 | |
61adedf3 | 2091 | info = skb_tunnel_info(skb); |
3093fbe7 | 2092 | |
6681712d DS |
2093 | skb_reset_mac_header(skb); |
2094 | eth = eth_hdr(skb); | |
2095 | ||
f564f45c CW |
2096 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
2097 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
2098 | return arp_reduce(dev, skb); | |
2099 | #if IS_ENABLED(CONFIG_IPV6) | |
2100 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
91269e39 LR |
2101 | pskb_may_pull(skb, sizeof(struct ipv6hdr) |
2102 | + sizeof(struct nd_msg)) && | |
f564f45c CW |
2103 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { |
2104 | struct nd_msg *msg; | |
2105 | ||
2106 | msg = (struct nd_msg *)skb_transport_header(skb); | |
2107 | if (msg->icmph.icmp6_code == 0 && | |
2108 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
2109 | return neigh_reduce(dev, skb); | |
2110 | } | |
7a9f526f | 2111 | eth = eth_hdr(skb); |
f564f45c CW |
2112 | #endif |
2113 | } | |
6681712d | 2114 | |
da8b43c0 | 2115 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA && |
46fa062a | 2116 | info && info->mode & IP_TUNNEL_INFO_TX) { |
ee122c79 TG |
2117 | vxlan_xmit_one(skb, dev, NULL, false); |
2118 | return NETDEV_TX_OK; | |
2119 | } | |
2120 | ||
6681712d | 2121 | f = vxlan_find_mac(vxlan, eth->h_dest); |
ae884082 DS |
2122 | did_rsc = false; |
2123 | ||
2124 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
2125 | (ntohs(eth->h_proto) == ETH_P_IP || |
2126 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2127 | did_rsc = route_shortcircuit(dev, skb); |
2128 | if (did_rsc) | |
2129 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
2130 | } | |
2131 | ||
6681712d | 2132 | if (f == NULL) { |
afbd8bae MR |
2133 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
2134 | if (f == NULL) { | |
2135 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
2136 | !is_multicast_ether_addr(eth->h_dest)) | |
2137 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2138 | ||
2139 | dev->stats.tx_dropped++; | |
8f646c92 | 2140 | kfree_skb(skb); |
afbd8bae MR |
2141 | return NETDEV_TX_OK; |
2142 | } | |
2143 | } | |
6681712d | 2144 | |
afbd8bae MR |
2145 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2146 | struct sk_buff *skb1; | |
6681712d | 2147 | |
8f646c92 ED |
2148 | if (!fdst) { |
2149 | fdst = rdst; | |
2150 | continue; | |
2151 | } | |
afbd8bae MR |
2152 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2153 | if (skb1) | |
2154 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
2155 | } |
2156 | ||
8f646c92 ED |
2157 | if (fdst) |
2158 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
2159 | else | |
2160 | kfree_skb(skb); | |
4ad16930 | 2161 | return NETDEV_TX_OK; |
6681712d DS |
2162 | } |
2163 | ||
d342894c | 2164 | /* Walk the forwarding table and purge stale entries */ |
2165 | static void vxlan_cleanup(unsigned long arg) | |
2166 | { | |
2167 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2168 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2169 | unsigned int h; | |
2170 | ||
2171 | if (!netif_running(vxlan->dev)) | |
2172 | return; | |
2173 | ||
d342894c | 2174 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2175 | struct hlist_node *p, *n; | |
14e1d0fa SD |
2176 | |
2177 | spin_lock_bh(&vxlan->hash_lock); | |
d342894c | 2178 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2179 | struct vxlan_fdb *f | |
2180 | = container_of(p, struct vxlan_fdb, hlist); | |
2181 | unsigned long timeout; | |
2182 | ||
3c172868 | 2183 | if (f->state & NUD_PERMANENT) |
d342894c | 2184 | continue; |
2185 | ||
0dfbdf41 | 2186 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2187 | if (time_before_eq(timeout, jiffies)) { |
2188 | netdev_dbg(vxlan->dev, | |
2189 | "garbage collect %pM\n", | |
2190 | f->eth_addr); | |
2191 | f->state = NUD_STALE; | |
2192 | vxlan_fdb_destroy(vxlan, f); | |
2193 | } else if (time_before(timeout, next_timer)) | |
2194 | next_timer = timeout; | |
2195 | } | |
14e1d0fa | 2196 | spin_unlock_bh(&vxlan->hash_lock); |
d342894c | 2197 | } |
d342894c | 2198 | |
2199 | mod_timer(&vxlan->age_timer, next_timer); | |
2200 | } | |
2201 | ||
9c2e24e1 PS |
2202 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2203 | { | |
56ef9c90 | 2204 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
9c2e24e1 PS |
2205 | __u32 vni = vxlan->default_dst.remote_vni; |
2206 | ||
2207 | vxlan->vn_sock = vs; | |
56ef9c90 | 2208 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 2209 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); |
56ef9c90 | 2210 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
2211 | } |
2212 | ||
d342894c | 2213 | /* Setup stats when device is created */ |
2214 | static int vxlan_init(struct net_device *dev) | |
2215 | { | |
1c213bd2 | 2216 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2217 | if (!dev->tstats) |
d342894c | 2218 | return -ENOMEM; |
2219 | ||
2220 | return 0; | |
2221 | } | |
2222 | ||
ba609e9b | 2223 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2224 | { |
2225 | struct vxlan_fdb *f; | |
2226 | ||
2227 | spin_lock_bh(&vxlan->hash_lock); | |
2228 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2229 | if (f) | |
2230 | vxlan_fdb_destroy(vxlan, f); | |
2231 | spin_unlock_bh(&vxlan->hash_lock); | |
2232 | } | |
2233 | ||
ebf4063e SH |
2234 | static void vxlan_uninit(struct net_device *dev) |
2235 | { | |
2236 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 2237 | |
ba609e9b | 2238 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2239 | |
ebf4063e SH |
2240 | free_percpu(dev->tstats); |
2241 | } | |
2242 | ||
d342894c | 2243 | /* Start ageing timer and join group when device is brought up */ |
2244 | static int vxlan_open(struct net_device *dev) | |
2245 | { | |
2246 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
56ef9c90 MRL |
2247 | struct vxlan_sock *vs; |
2248 | int ret = 0; | |
1c51a915 | 2249 | |
614732ea TG |
2250 | vs = vxlan_sock_add(vxlan->net, vxlan->cfg.dst_port, |
2251 | vxlan->cfg.no_share, vxlan->flags); | |
56ef9c90 MRL |
2252 | if (IS_ERR(vs)) |
2253 | return PTR_ERR(vs); | |
2254 | ||
2255 | vxlan_vs_add_dev(vs, vxlan); | |
d342894c | 2256 | |
79d4a94f | 2257 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 | 2258 | ret = vxlan_igmp_join(vxlan); |
bef0057b MRL |
2259 | if (ret == -EADDRINUSE) |
2260 | ret = 0; | |
56ef9c90 MRL |
2261 | if (ret) { |
2262 | vxlan_sock_release(vs); | |
2263 | return ret; | |
2264 | } | |
d342894c | 2265 | } |
2266 | ||
0dfbdf41 | 2267 | if (vxlan->cfg.age_interval) |
d342894c | 2268 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
2269 | ||
56ef9c90 | 2270 | return ret; |
d342894c | 2271 | } |
2272 | ||
2273 | /* Purge the forwarding table */ | |
2274 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2275 | { | |
31fec5aa | 2276 | unsigned int h; |
d342894c | 2277 | |
2278 | spin_lock_bh(&vxlan->hash_lock); | |
2279 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2280 | struct hlist_node *p, *n; | |
2281 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2282 | struct vxlan_fdb *f | |
2283 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2284 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2285 | if (!is_zero_ether_addr(f->eth_addr)) | |
2286 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2287 | } |
2288 | } | |
2289 | spin_unlock_bh(&vxlan->hash_lock); | |
2290 | } | |
2291 | ||
2292 | /* Cleanup timer and forwarding table on shutdown */ | |
2293 | static int vxlan_stop(struct net_device *dev) | |
2294 | { | |
2295 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2296 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2297 | struct vxlan_sock *vs = vxlan->vn_sock; |
56ef9c90 | 2298 | int ret = 0; |
d342894c | 2299 | |
24c0e683 | 2300 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 2301 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 2302 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 2303 | |
2304 | del_timer_sync(&vxlan->age_timer); | |
2305 | ||
2306 | vxlan_flush(vxlan); | |
56ef9c90 | 2307 | vxlan_sock_release(vs); |
d342894c | 2308 | |
56ef9c90 | 2309 | return ret; |
d342894c | 2310 | } |
2311 | ||
d342894c | 2312 | /* Stub, nothing needs to be done. */ |
2313 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2314 | { | |
2315 | } | |
2316 | ||
345010b5 DB |
2317 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2318 | { | |
2319 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2320 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2321 | struct net_device *lowerdev; | |
2322 | int max_mtu; | |
2323 | ||
f01ec1c0 | 2324 | lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex); |
345010b5 DB |
2325 | if (lowerdev == NULL) |
2326 | return eth_change_mtu(dev, new_mtu); | |
2327 | ||
2328 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
2329 | max_mtu = lowerdev->mtu - VXLAN6_HEADROOM; | |
2330 | else | |
2331 | max_mtu = lowerdev->mtu - VXLAN_HEADROOM; | |
2332 | ||
2333 | if (new_mtu < 68 || new_mtu > max_mtu) | |
2334 | return -EINVAL; | |
2335 | ||
2336 | dev->mtu = new_mtu; | |
2337 | return 0; | |
2338 | } | |
2339 | ||
d342894c | 2340 | static const struct net_device_ops vxlan_netdev_ops = { |
2341 | .ndo_init = vxlan_init, | |
ebf4063e | 2342 | .ndo_uninit = vxlan_uninit, |
d342894c | 2343 | .ndo_open = vxlan_open, |
2344 | .ndo_stop = vxlan_stop, | |
2345 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2346 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2347 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2348 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2349 | .ndo_validate_addr = eth_validate_addr, |
2350 | .ndo_set_mac_address = eth_mac_addr, | |
2351 | .ndo_fdb_add = vxlan_fdb_add, | |
2352 | .ndo_fdb_del = vxlan_fdb_delete, | |
2353 | .ndo_fdb_dump = vxlan_fdb_dump, | |
2354 | }; | |
2355 | ||
2356 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2357 | static struct device_type vxlan_type = { | |
2358 | .name = "vxlan", | |
2359 | }; | |
2360 | ||
53cf5275 | 2361 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2362 | * supply the listening VXLAN udp ports. Callers are expected |
2363 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2364 | */ |
2365 | void vxlan_get_rx_port(struct net_device *dev) | |
2366 | { | |
2367 | struct vxlan_sock *vs; | |
2368 | struct net *net = dev_net(dev); | |
2369 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2370 | sa_family_t sa_family; | |
35e42379 JG |
2371 | __be16 port; |
2372 | unsigned int i; | |
53cf5275 JG |
2373 | |
2374 | spin_lock(&vn->sock_lock); | |
2375 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2376 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2377 | port = inet_sk(vs->sock->sk)->inet_sport; | |
705cc62f | 2378 | sa_family = vxlan_get_sk_family(vs); |
53cf5275 JG |
2379 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, |
2380 | port); | |
2381 | } | |
2382 | } | |
2383 | spin_unlock(&vn->sock_lock); | |
2384 | } | |
2385 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2386 | ||
d342894c | 2387 | /* Initialize the device structure. */ |
2388 | static void vxlan_setup(struct net_device *dev) | |
2389 | { | |
2390 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2391 | unsigned int h; |
d342894c | 2392 | |
2393 | eth_hw_addr_random(dev); | |
2394 | ether_setup(dev); | |
2395 | ||
2396 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 2397 | dev->destructor = free_netdev; |
d342894c | 2398 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2399 | ||
d342894c | 2400 | dev->features |= NETIF_F_LLTX; |
d6727fe3 | 2401 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2402 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2403 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2404 | |
1eaa8178 PS |
2405 | dev->vlan_features = dev->features; |
2406 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2407 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2408 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2409 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
02875878 | 2410 | netif_keep_dst(dev); |
22dba393 | 2411 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
d342894c | 2412 | |
553675fb | 2413 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2414 | spin_lock_init(&vxlan->hash_lock); |
2415 | ||
2416 | init_timer_deferrable(&vxlan->age_timer); | |
2417 | vxlan->age_timer.function = vxlan_cleanup; | |
2418 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2419 | ||
0dfbdf41 | 2420 | vxlan->cfg.dst_port = htons(vxlan_port); |
05f47d69 | 2421 | |
d342894c | 2422 | vxlan->dev = dev; |
2423 | ||
58ce31cc TH |
2424 | gro_cells_init(&vxlan->gro_cells, dev); |
2425 | ||
d342894c | 2426 | for (h = 0; h < FDB_HASH_SIZE; ++h) |
2427 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2428 | } | |
2429 | ||
2430 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
2431 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2432 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2433 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2434 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2435 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2436 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2437 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2438 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
2439 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
2440 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2441 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2442 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2443 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2444 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2445 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2446 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
f8a9b1bc | 2447 | [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
823aa873 | 2448 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
2449 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
2450 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
2451 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
2452 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
2453 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 2454 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
0ace2ca8 | 2455 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
d342894c | 2456 | }; |
2457 | ||
2458 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2459 | { | |
2460 | if (tb[IFLA_ADDRESS]) { | |
2461 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2462 | pr_debug("invalid link address (not ethernet)\n"); | |
2463 | return -EINVAL; | |
2464 | } | |
2465 | ||
2466 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2467 | pr_debug("invalid all zero ethernet address\n"); | |
2468 | return -EADDRNOTAVAIL; | |
2469 | } | |
2470 | } | |
2471 | ||
2472 | if (!data) | |
2473 | return -EINVAL; | |
2474 | ||
2475 | if (data[IFLA_VXLAN_ID]) { | |
2476 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2477 | if (id >= VXLAN_VID_MASK) | |
2478 | return -ERANGE; | |
2479 | } | |
2480 | ||
05f47d69 | 2481 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2482 | const struct ifla_vxlan_port_range *p | |
2483 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2484 | ||
2485 | if (ntohs(p->high) < ntohs(p->low)) { | |
2486 | pr_debug("port range %u .. %u not valid\n", | |
2487 | ntohs(p->low), ntohs(p->high)); | |
2488 | return -EINVAL; | |
2489 | } | |
2490 | } | |
2491 | ||
d342894c | 2492 | return 0; |
2493 | } | |
2494 | ||
1b13c97f YB |
2495 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2496 | struct ethtool_drvinfo *drvinfo) | |
2497 | { | |
2498 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2499 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2500 | } | |
2501 | ||
2502 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2503 | .get_drvinfo = vxlan_get_drvinfo, | |
2504 | .get_link = ethtool_op_get_link, | |
2505 | }; | |
2506 | ||
553675fb | 2507 | static void vxlan_del_work(struct work_struct *work) |
2508 | { | |
2509 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
acbf74a7 | 2510 | udp_tunnel_sock_release(vs->sock); |
553675fb | 2511 | kfree_rcu(vs, rcu); |
2512 | } | |
2513 | ||
3ee64f39 TH |
2514 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2515 | __be16 port, u32 flags) | |
553675fb | 2516 | { |
e4c7ed41 | 2517 | struct socket *sock; |
3ee64f39 TH |
2518 | struct udp_port_cfg udp_conf; |
2519 | int err; | |
e4c7ed41 | 2520 | |
3ee64f39 | 2521 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2522 | |
3ee64f39 TH |
2523 | if (ipv6) { |
2524 | udp_conf.family = AF_INET6; | |
3ee64f39 | 2525 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 2526 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
a43a9ef6 | 2527 | udp_conf.ipv6_v6only = 1; |
3ee64f39 TH |
2528 | } else { |
2529 | udp_conf.family = AF_INET; | |
e4c7ed41 | 2530 | } |
e4c7ed41 | 2531 | |
3ee64f39 | 2532 | udp_conf.local_udp_port = port; |
553675fb | 2533 | |
3ee64f39 TH |
2534 | /* Open UDP socket */ |
2535 | err = udp_sock_create(net, &udp_conf, &sock); | |
2536 | if (err < 0) | |
2537 | return ERR_PTR(err); | |
e4c7ed41 | 2538 | |
39deb2c7 | 2539 | return sock; |
e4c7ed41 CW |
2540 | } |
2541 | ||
2542 | /* Create new listen socket if needed */ | |
2543 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, | |
359a0ea9 | 2544 | u32 flags) |
e4c7ed41 CW |
2545 | { |
2546 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2547 | struct vxlan_sock *vs; | |
2548 | struct socket *sock; | |
e4c7ed41 | 2549 | unsigned int h; |
359a0ea9 | 2550 | bool ipv6 = !!(flags & VXLAN_F_IPV6); |
acbf74a7 | 2551 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 2552 | |
dc01e7d3 | 2553 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2554 | if (!vs) |
2555 | return ERR_PTR(-ENOMEM); | |
2556 | ||
2557 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2558 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2559 | ||
2560 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2561 | ||
3ee64f39 | 2562 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 2563 | if (IS_ERR(sock)) { |
56ef9c90 MRL |
2564 | pr_info("Cannot bind port %d, err=%ld\n", ntohs(port), |
2565 | PTR_ERR(sock)); | |
553675fb | 2566 | kfree(vs); |
e50fddc8 | 2567 | return ERR_CAST(sock); |
553675fb | 2568 | } |
e4c7ed41 CW |
2569 | |
2570 | vs->sock = sock; | |
9c2e24e1 | 2571 | atomic_set(&vs->refcnt, 1); |
af33c1ad | 2572 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 2573 | |
dc01e7d3 OG |
2574 | /* Initialize the vxlan udp offloads structure */ |
2575 | vs->udp_offloads.port = port; | |
2576 | vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive; | |
2577 | vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete; | |
2578 | ||
9c2e24e1 PS |
2579 | spin_lock(&vn->sock_lock); |
2580 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2581 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2582 | spin_unlock(&vn->sock_lock); |
553675fb | 2583 | |
2584 | /* Mark socket as an encapsulation socket. */ | |
acbf74a7 AZ |
2585 | tunnel_cfg.sk_user_data = vs; |
2586 | tunnel_cfg.encap_type = 1; | |
2587 | tunnel_cfg.encap_rcv = vxlan_udp_encap_recv; | |
2588 | tunnel_cfg.encap_destroy = NULL; | |
2589 | ||
2590 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 2591 | |
9c2e24e1 PS |
2592 | return vs; |
2593 | } | |
2594 | ||
614732ea TG |
2595 | static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
2596 | bool no_share, u32 flags) | |
9c2e24e1 PS |
2597 | { |
2598 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2599 | struct vxlan_sock *vs; | |
19ca9fc1 | 2600 | bool ipv6 = flags & VXLAN_F_IPV6; |
9c2e24e1 | 2601 | |
56ef9c90 MRL |
2602 | if (!no_share) { |
2603 | spin_lock(&vn->sock_lock); | |
2604 | vs = vxlan_find_sock(net, ipv6 ? AF_INET6 : AF_INET, port, | |
2605 | flags); | |
614732ea | 2606 | if (vs) { |
56ef9c90 MRL |
2607 | if (!atomic_add_unless(&vs->refcnt, 1, 0)) |
2608 | vs = ERR_PTR(-EBUSY); | |
2609 | spin_unlock(&vn->sock_lock); | |
2610 | return vs; | |
2611 | } | |
2612 | spin_unlock(&vn->sock_lock); | |
2613 | } | |
9c2e24e1 | 2614 | |
614732ea | 2615 | return vxlan_socket_create(net, port, flags); |
553675fb | 2616 | } |
2617 | ||
0dfbdf41 TG |
2618 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
2619 | struct vxlan_config *conf) | |
d342894c | 2620 | { |
33564bbb | 2621 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
d342894c | 2622 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 2623 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 2624 | int err; |
e4c7ed41 | 2625 | bool use_ipv6 = false; |
0dfbdf41 | 2626 | __be16 default_port = vxlan->cfg.dst_port; |
d342894c | 2627 | |
33564bbb | 2628 | vxlan->net = src_net; |
f01ec1c0 | 2629 | |
0dfbdf41 | 2630 | dst->remote_vni = conf->vni; |
d342894c | 2631 | |
0dfbdf41 | 2632 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); |
d342894c | 2633 | |
0dfbdf41 TG |
2634 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2635 | if (!dst->remote_ip.sa.sa_family) | |
2636 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 | 2637 | |
0dfbdf41 | 2638 | if (dst->remote_ip.sa.sa_family == AF_INET6 || |
057ba29b JB |
2639 | vxlan->cfg.saddr.sa.sa_family == AF_INET6) { |
2640 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2641 | return -EPFNOSUPPORT; | |
e4c7ed41 | 2642 | use_ipv6 = true; |
057ba29b | 2643 | } |
d342894c | 2644 | |
0dfbdf41 | 2645 | if (conf->remote_ifindex) { |
34e02aa1 | 2646 | struct net_device *lowerdev |
0dfbdf41 TG |
2647 | = __dev_get_by_index(src_net, conf->remote_ifindex); |
2648 | ||
2649 | dst->remote_ifindex = conf->remote_ifindex; | |
34e02aa1 | 2650 | |
2651 | if (!lowerdev) { | |
c7995c43 | 2652 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2653 | return -ENODEV; |
2654 | } | |
d342894c | 2655 | |
e4c7ed41 CW |
2656 | #if IS_ENABLED(CONFIG_IPV6) |
2657 | if (use_ipv6) { | |
2658 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2659 | if (idev && idev->cnf.disable_ipv6) { | |
2660 | pr_info("IPv6 is disabled via sysctl\n"); | |
2661 | return -EPERM; | |
2662 | } | |
2663 | vxlan->flags |= VXLAN_F_IPV6; | |
2664 | } | |
2665 | #endif | |
2666 | ||
0dfbdf41 | 2667 | if (!conf->mtu) |
e4c7ed41 | 2668 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 | 2669 | |
2853af6a | 2670 | dev->needed_headroom = lowerdev->hard_header_len + |
e4c7ed41 | 2671 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
9dc2ad10 | 2672 | } else if (use_ipv6) { |
7bda701e | 2673 | vxlan->flags |= VXLAN_F_IPV6; |
9dc2ad10 JB |
2674 | dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM; |
2675 | } else { | |
2676 | dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM; | |
2677 | } | |
d342894c | 2678 | |
0dfbdf41 TG |
2679 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
2680 | if (!vxlan->cfg.dst_port) | |
2681 | vxlan->cfg.dst_port = default_port; | |
2682 | vxlan->flags |= conf->flags; | |
2683 | ||
2684 | if (!vxlan->cfg.age_interval) | |
2685 | vxlan->cfg.age_interval = FDB_AGE_DEFAULT; | |
2686 | ||
2687 | if (vxlan_find_vni(src_net, conf->vni, use_ipv6 ? AF_INET6 : AF_INET, | |
2688 | vxlan->cfg.dst_port, vxlan->flags)) | |
2689 | return -EEXIST; | |
2690 | ||
2691 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
2692 | ||
2693 | /* create an fdb entry for a valid default destination */ | |
2694 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2695 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2696 | &vxlan->default_dst.remote_ip, | |
2697 | NUD_REACHABLE|NUD_PERMANENT, | |
2698 | NLM_F_EXCL|NLM_F_CREATE, | |
2699 | vxlan->cfg.dst_port, | |
2700 | vxlan->default_dst.remote_vni, | |
2701 | vxlan->default_dst.remote_ifindex, | |
2702 | NTF_SELF); | |
2703 | if (err) | |
2704 | return err; | |
2705 | } | |
2706 | ||
2707 | err = register_netdevice(dev); | |
2708 | if (err) { | |
2709 | vxlan_fdb_delete_default(vxlan); | |
2710 | return err; | |
2711 | } | |
2712 | ||
2713 | list_add(&vxlan->next, &vn->vxlan_list); | |
2714 | ||
2715 | return 0; | |
2716 | } | |
2717 | ||
2718 | struct net_device *vxlan_dev_create(struct net *net, const char *name, | |
2719 | u8 name_assign_type, struct vxlan_config *conf) | |
2720 | { | |
2721 | struct nlattr *tb[IFLA_MAX+1]; | |
2722 | struct net_device *dev; | |
2723 | int err; | |
2724 | ||
2725 | memset(&tb, 0, sizeof(tb)); | |
2726 | ||
2727 | dev = rtnl_create_link(net, name, name_assign_type, | |
2728 | &vxlan_link_ops, tb); | |
2729 | if (IS_ERR(dev)) | |
2730 | return dev; | |
2731 | ||
2732 | err = vxlan_dev_configure(net, dev, conf); | |
2733 | if (err < 0) { | |
2734 | free_netdev(dev); | |
2735 | return ERR_PTR(err); | |
2736 | } | |
2737 | ||
2738 | return dev; | |
2739 | } | |
2740 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
2741 | ||
2742 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
2743 | struct nlattr *tb[], struct nlattr *data[]) | |
2744 | { | |
2745 | struct vxlan_config conf; | |
2746 | int err; | |
2747 | ||
2748 | if (!data[IFLA_VXLAN_ID]) | |
2749 | return -EINVAL; | |
2750 | ||
2751 | memset(&conf, 0, sizeof(conf)); | |
2752 | conf.vni = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2753 | ||
2754 | if (data[IFLA_VXLAN_GROUP]) { | |
2755 | conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); | |
2756 | } else if (data[IFLA_VXLAN_GROUP6]) { | |
2757 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2758 | return -EPFNOSUPPORT; | |
2759 | ||
2760 | conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); | |
2761 | conf.remote_ip.sa.sa_family = AF_INET6; | |
2762 | } | |
2763 | ||
2764 | if (data[IFLA_VXLAN_LOCAL]) { | |
2765 | conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); | |
2766 | conf.saddr.sa.sa_family = AF_INET; | |
2767 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2768 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2769 | return -EPFNOSUPPORT; | |
2770 | ||
2771 | /* TODO: respect scope id */ | |
2772 | conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); | |
2773 | conf.saddr.sa.sa_family = AF_INET6; | |
2774 | } | |
2775 | ||
2776 | if (data[IFLA_VXLAN_LINK]) | |
2777 | conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); | |
2778 | ||
d342894c | 2779 | if (data[IFLA_VXLAN_TOS]) |
0dfbdf41 | 2780 | conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 2781 | |
afb97186 | 2782 | if (data[IFLA_VXLAN_TTL]) |
0dfbdf41 | 2783 | conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 2784 | |
d342894c | 2785 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
0dfbdf41 | 2786 | conf.flags |= VXLAN_F_LEARN; |
d342894c | 2787 | |
2788 | if (data[IFLA_VXLAN_AGEING]) | |
0dfbdf41 | 2789 | conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); |
d342894c | 2790 | |
e4f67add | 2791 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
0dfbdf41 | 2792 | conf.flags |= VXLAN_F_PROXY; |
e4f67add DS |
2793 | |
2794 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
0dfbdf41 | 2795 | conf.flags |= VXLAN_F_RSC; |
e4f67add DS |
2796 | |
2797 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
0dfbdf41 | 2798 | conf.flags |= VXLAN_F_L2MISS; |
e4f67add DS |
2799 | |
2800 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
0dfbdf41 | 2801 | conf.flags |= VXLAN_F_L3MISS; |
e4f67add | 2802 | |
d342894c | 2803 | if (data[IFLA_VXLAN_LIMIT]) |
0dfbdf41 | 2804 | conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); |
d342894c | 2805 | |
f8a9b1bc AS |
2806 | if (data[IFLA_VXLAN_COLLECT_METADATA] && |
2807 | nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA])) | |
2808 | conf.flags |= VXLAN_F_COLLECT_METADATA; | |
2809 | ||
05f47d69 | 2810 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2811 | const struct ifla_vxlan_port_range *p | |
2812 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
0dfbdf41 TG |
2813 | conf.port_min = ntohs(p->low); |
2814 | conf.port_max = ntohs(p->high); | |
05f47d69 | 2815 | } |
2816 | ||
823aa873 | 2817 | if (data[IFLA_VXLAN_PORT]) |
0dfbdf41 | 2818 | conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); |
823aa873 | 2819 | |
359a0ea9 | 2820 | if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) |
0dfbdf41 | 2821 | conf.flags |= VXLAN_F_UDP_CSUM; |
359a0ea9 TH |
2822 | |
2823 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && | |
2824 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
0dfbdf41 | 2825 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; |
359a0ea9 TH |
2826 | |
2827 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && | |
2828 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
0dfbdf41 | 2829 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; |
359a0ea9 | 2830 | |
dfd8645e TH |
2831 | if (data[IFLA_VXLAN_REMCSUM_TX] && |
2832 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
0dfbdf41 | 2833 | conf.flags |= VXLAN_F_REMCSUM_TX; |
dfd8645e TH |
2834 | |
2835 | if (data[IFLA_VXLAN_REMCSUM_RX] && | |
2836 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
0dfbdf41 | 2837 | conf.flags |= VXLAN_F_REMCSUM_RX; |
dfd8645e | 2838 | |
3511494c | 2839 | if (data[IFLA_VXLAN_GBP]) |
0dfbdf41 | 2840 | conf.flags |= VXLAN_F_GBP; |
3511494c | 2841 | |
0ace2ca8 | 2842 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) |
0dfbdf41 | 2843 | conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL; |
0ace2ca8 | 2844 | |
0dfbdf41 TG |
2845 | err = vxlan_dev_configure(src_net, dev, &conf); |
2846 | switch (err) { | |
2847 | case -ENODEV: | |
2848 | pr_info("ifindex %d does not exist\n", conf.remote_ifindex); | |
2849 | break; | |
1b13c97f | 2850 | |
0dfbdf41 TG |
2851 | case -EPERM: |
2852 | pr_info("IPv6 is disabled via sysctl\n"); | |
2853 | break; | |
d342894c | 2854 | |
0dfbdf41 TG |
2855 | case -EEXIST: |
2856 | pr_info("duplicate VNI %u\n", conf.vni); | |
2857 | break; | |
afbd8bae MR |
2858 | } |
2859 | ||
0dfbdf41 | 2860 | return err; |
d342894c | 2861 | } |
2862 | ||
2863 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2864 | { | |
2865 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2866 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 2867 | |
fe5c3561 | 2868 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2869 | if (!hlist_unhashed(&vxlan->hlist)) |
2870 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 2871 | spin_unlock(&vn->sock_lock); |
2872 | ||
58ce31cc | 2873 | gro_cells_destroy(&vxlan->gro_cells); |
553675fb | 2874 | list_del(&vxlan->next); |
d342894c | 2875 | unregister_netdevice_queue(dev, head); |
2876 | } | |
2877 | ||
2878 | static size_t vxlan_get_size(const struct net_device *dev) | |
2879 | { | |
2880 | ||
2881 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 2882 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 2883 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 2884 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 2885 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
2886 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
2887 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
2888 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
2889 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
2890 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
2891 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
da8b43c0 | 2892 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
d342894c | 2893 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
2894 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 2895 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
2896 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
2897 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
2898 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
2899 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
2900 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
2901 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 2902 | 0; |
2903 | } | |
2904 | ||
2905 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
2906 | { | |
2907 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 2908 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 2909 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
2910 | .low = htons(vxlan->cfg.port_min), |
2911 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 2912 | }; |
d342894c | 2913 | |
c7995c43 | 2914 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 2915 | goto nla_put_failure; |
2916 | ||
e4c7ed41 CW |
2917 | if (!vxlan_addr_any(&dst->remote_ip)) { |
2918 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
2919 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
2920 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
2921 | goto nla_put_failure; |
2922 | #if IS_ENABLED(CONFIG_IPV6) | |
2923 | } else { | |
930345ea JB |
2924 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
2925 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
2926 | goto nla_put_failure; |
2927 | #endif | |
2928 | } | |
2929 | } | |
d342894c | 2930 | |
c7995c43 | 2931 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 2932 | goto nla_put_failure; |
2933 | ||
0dfbdf41 TG |
2934 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
2935 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 2936 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 2937 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
2938 | goto nla_put_failure; |
2939 | #if IS_ENABLED(CONFIG_IPV6) | |
2940 | } else { | |
930345ea | 2941 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 2942 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
2943 | goto nla_put_failure; |
2944 | #endif | |
2945 | } | |
2946 | } | |
d342894c | 2947 | |
0dfbdf41 TG |
2948 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
2949 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || | |
e4f67add DS |
2950 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
2951 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
2952 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
2953 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
2954 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
2955 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
2956 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
2957 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
2958 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
da8b43c0 AS |
2959 | nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
2960 | !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) || | |
0dfbdf41 TG |
2961 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
2962 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
2963 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 TH |
2964 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
2965 | !!(vxlan->flags & VXLAN_F_UDP_CSUM)) || | |
2966 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, | |
2967 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
2968 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
dfd8645e TH |
2969 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
2970 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, | |
2971 | !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) || | |
2972 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, | |
2973 | !!(vxlan->flags & VXLAN_F_REMCSUM_RX))) | |
d342894c | 2974 | goto nla_put_failure; |
2975 | ||
05f47d69 | 2976 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
2977 | goto nla_put_failure; | |
2978 | ||
3511494c TG |
2979 | if (vxlan->flags & VXLAN_F_GBP && |
2980 | nla_put_flag(skb, IFLA_VXLAN_GBP)) | |
2981 | goto nla_put_failure; | |
2982 | ||
0ace2ca8 TH |
2983 | if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL && |
2984 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) | |
2985 | goto nla_put_failure; | |
2986 | ||
d342894c | 2987 | return 0; |
2988 | ||
2989 | nla_put_failure: | |
2990 | return -EMSGSIZE; | |
2991 | } | |
2992 | ||
1728d4fa ND |
2993 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
2994 | { | |
2995 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2996 | ||
2997 | return vxlan->net; | |
2998 | } | |
2999 | ||
d342894c | 3000 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
3001 | .kind = "vxlan", | |
3002 | .maxtype = IFLA_VXLAN_MAX, | |
3003 | .policy = vxlan_policy, | |
3004 | .priv_size = sizeof(struct vxlan_dev), | |
3005 | .setup = vxlan_setup, | |
3006 | .validate = vxlan_validate, | |
3007 | .newlink = vxlan_newlink, | |
3008 | .dellink = vxlan_dellink, | |
3009 | .get_size = vxlan_get_size, | |
3010 | .fill_info = vxlan_fill_info, | |
1728d4fa | 3011 | .get_link_net = vxlan_get_link_net, |
d342894c | 3012 | }; |
3013 | ||
acaf4e70 DB |
3014 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
3015 | struct net_device *dev) | |
3016 | { | |
3017 | struct vxlan_dev *vxlan, *next; | |
3018 | LIST_HEAD(list_kill); | |
3019 | ||
3020 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3021 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3022 | ||
3023 | /* In case we created vxlan device with carrier | |
3024 | * and we loose the carrier due to module unload | |
3025 | * we also need to remove vxlan device. In other | |
3026 | * cases, it's not necessary and remote_ifindex | |
3027 | * is 0 here, so no matches. | |
3028 | */ | |
3029 | if (dst->remote_ifindex == dev->ifindex) | |
3030 | vxlan_dellink(vxlan->dev, &list_kill); | |
3031 | } | |
3032 | ||
3033 | unregister_netdevice_many(&list_kill); | |
3034 | } | |
3035 | ||
3036 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
3037 | unsigned long event, void *ptr) | |
3038 | { | |
3039 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 3040 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 3041 | |
783c1463 | 3042 | if (event == NETDEV_UNREGISTER) |
acaf4e70 DB |
3043 | vxlan_handle_lowerdev_unregister(vn, dev); |
3044 | ||
3045 | return NOTIFY_DONE; | |
3046 | } | |
3047 | ||
3048 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
3049 | .notifier_call = vxlan_lowerdev_event, | |
3050 | }; | |
3051 | ||
d342894c | 3052 | static __net_init int vxlan_init_net(struct net *net) |
3053 | { | |
3054 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 3055 | unsigned int h; |
d342894c | 3056 | |
553675fb | 3057 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 3058 | spin_lock_init(&vn->sock_lock); |
d342894c | 3059 | |
553675fb | 3060 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
3061 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 3062 | |
3063 | return 0; | |
3064 | } | |
3065 | ||
f01ec1c0 ND |
3066 | static void __net_exit vxlan_exit_net(struct net *net) |
3067 | { | |
3068 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3069 | struct vxlan_dev *vxlan, *next; | |
3070 | struct net_device *dev, *aux; | |
3071 | LIST_HEAD(list); | |
3072 | ||
3073 | rtnl_lock(); | |
3074 | for_each_netdev_safe(net, dev, aux) | |
3075 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
3076 | unregister_netdevice_queue(dev, &list); | |
3077 | ||
3078 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3079 | /* If vxlan->dev is in the same netns, it has already been added | |
3080 | * to the list by the previous loop. | |
3081 | */ | |
58ce31cc TH |
3082 | if (!net_eq(dev_net(vxlan->dev), net)) { |
3083 | gro_cells_destroy(&vxlan->gro_cells); | |
13c3ed6a | 3084 | unregister_netdevice_queue(vxlan->dev, &list); |
58ce31cc | 3085 | } |
f01ec1c0 ND |
3086 | } |
3087 | ||
3088 | unregister_netdevice_many(&list); | |
3089 | rtnl_unlock(); | |
3090 | } | |
3091 | ||
d342894c | 3092 | static struct pernet_operations vxlan_net_ops = { |
3093 | .init = vxlan_init_net, | |
f01ec1c0 | 3094 | .exit = vxlan_exit_net, |
d342894c | 3095 | .id = &vxlan_net_id, |
3096 | .size = sizeof(struct vxlan_net), | |
3097 | }; | |
3098 | ||
3099 | static int __init vxlan_init_module(void) | |
3100 | { | |
3101 | int rc; | |
3102 | ||
758c57d1 SH |
3103 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
3104 | if (!vxlan_wq) | |
3105 | return -ENOMEM; | |
3106 | ||
d342894c | 3107 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
3108 | ||
783c1463 | 3109 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 3110 | if (rc) |
3111 | goto out1; | |
3112 | ||
acaf4e70 | 3113 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 3114 | if (rc) |
3115 | goto out2; | |
3116 | ||
acaf4e70 DB |
3117 | rc = rtnl_link_register(&vxlan_link_ops); |
3118 | if (rc) | |
3119 | goto out3; | |
d342894c | 3120 | |
acaf4e70 DB |
3121 | return 0; |
3122 | out3: | |
3123 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 3124 | out2: |
783c1463 | 3125 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 3126 | out1: |
758c57d1 | 3127 | destroy_workqueue(vxlan_wq); |
d342894c | 3128 | return rc; |
3129 | } | |
7332a13b | 3130 | late_initcall(vxlan_init_module); |
d342894c | 3131 | |
3132 | static void __exit vxlan_cleanup_module(void) | |
3133 | { | |
b7153984 | 3134 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 3135 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 3136 | destroy_workqueue(vxlan_wq); |
783c1463 DB |
3137 | unregister_pernet_subsys(&vxlan_net_ops); |
3138 | /* rcu_barrier() is called by netns */ | |
d342894c | 3139 | } |
3140 | module_exit(vxlan_cleanup_module); | |
3141 | ||
3142 | MODULE_LICENSE("GPL"); | |
3143 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 3144 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 3145 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 3146 | MODULE_ALIAS_RTNL_LINK("vxlan"); |