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. | |
9 | * | |
10 | * TODO | |
d342894c | 11 | * - IPv6 (not in RFC) |
12 | */ | |
13 | ||
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/skbuff.h> | |
22 | #include <linux/rculist.h> | |
23 | #include <linux/netdevice.h> | |
24 | #include <linux/in.h> | |
25 | #include <linux/ip.h> | |
26 | #include <linux/udp.h> | |
27 | #include <linux/igmp.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/if_ether.h> | |
d342894c | 30 | #include <linux/hash.h> |
1b13c97f | 31 | #include <linux/ethtool.h> |
e4f67add DS |
32 | #include <net/arp.h> |
33 | #include <net/ndisc.h> | |
d342894c | 34 | #include <net/ip.h> |
c5441932 | 35 | #include <net/ip_tunnels.h> |
d342894c | 36 | #include <net/icmp.h> |
37 | #include <net/udp.h> | |
38 | #include <net/rtnetlink.h> | |
39 | #include <net/route.h> | |
40 | #include <net/dsfield.h> | |
41 | #include <net/inet_ecn.h> | |
42 | #include <net/net_namespace.h> | |
43 | #include <net/netns/generic.h> | |
44 | ||
45 | #define VXLAN_VERSION "0.1" | |
46 | ||
553675fb | 47 | #define PORT_HASH_BITS 8 |
48 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 49 | #define VNI_HASH_BITS 10 |
50 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
51 | #define FDB_HASH_BITS 8 | |
52 | #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) | |
53 | #define FDB_AGE_DEFAULT 300 /* 5 min */ | |
54 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
55 | ||
56 | #define VXLAN_N_VID (1u << 24) | |
57 | #define VXLAN_VID_MASK (VXLAN_N_VID - 1) | |
52b702ff AD |
58 | /* IP header + UDP + VXLAN + Ethernet header */ |
59 | #define VXLAN_HEADROOM (20 + 8 + 8 + 14) | |
d342894c | 60 | |
61 | #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */ | |
62 | ||
63 | /* VXLAN protocol header */ | |
64 | struct vxlanhdr { | |
65 | __be32 vx_flags; | |
66 | __be32 vx_vni; | |
67 | }; | |
68 | ||
23c578bf | 69 | /* UDP port for VXLAN traffic. |
70 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 71 | * for compatibility with early adopters. |
23c578bf | 72 | */ |
9daaa397 SH |
73 | static unsigned short vxlan_port __read_mostly = 8472; |
74 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 75 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
76 | ||
77 | static bool log_ecn_error = true; | |
78 | module_param(log_ecn_error, bool, 0644); | |
79 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
80 | ||
60d9d4c6 | 81 | static int vxlan_net_id; |
553675fb | 82 | |
afbd8bae MR |
83 | static const u8 all_zeros_mac[ETH_ALEN]; |
84 | ||
553675fb | 85 | /* per UDP socket information */ |
86 | struct vxlan_sock { | |
87 | struct hlist_node hlist; | |
88 | struct rcu_head rcu; | |
89 | struct work_struct del_work; | |
7c47cedf | 90 | atomic_t refcnt; |
553675fb | 91 | struct socket *sock; |
d342894c | 92 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
93 | }; | |
94 | ||
553675fb | 95 | /* per-network namespace private data for this module */ |
96 | struct vxlan_net { | |
97 | struct list_head vxlan_list; | |
98 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 99 | spinlock_t sock_lock; |
553675fb | 100 | }; |
101 | ||
6681712d | 102 | struct vxlan_rdst { |
6681712d DS |
103 | __be32 remote_ip; |
104 | __be16 remote_port; | |
105 | u32 remote_vni; | |
106 | u32 remote_ifindex; | |
3e61aa8f | 107 | struct list_head list; |
bc7892ba | 108 | struct rcu_head rcu; |
6681712d DS |
109 | }; |
110 | ||
d342894c | 111 | /* Forwarding table entry */ |
112 | struct vxlan_fdb { | |
113 | struct hlist_node hlist; /* linked list of entries */ | |
114 | struct rcu_head rcu; | |
115 | unsigned long updated; /* jiffies */ | |
116 | unsigned long used; | |
3e61aa8f | 117 | struct list_head remotes; |
d342894c | 118 | u16 state; /* see ndm_state */ |
ae884082 | 119 | u8 flags; /* see ndm_flags */ |
d342894c | 120 | u8 eth_addr[ETH_ALEN]; |
121 | }; | |
122 | ||
d342894c | 123 | /* Pseudo network device */ |
124 | struct vxlan_dev { | |
553675fb | 125 | struct hlist_node hlist; /* vni hash table */ |
126 | struct list_head next; /* vxlan's per namespace list */ | |
127 | struct vxlan_sock *vn_sock; /* listening socket */ | |
d342894c | 128 | struct net_device *dev; |
c7995c43 | 129 | struct vxlan_rdst default_dst; /* default destination */ |
d342894c | 130 | __be32 saddr; /* source address */ |
823aa873 | 131 | __be16 dst_port; |
05f47d69 | 132 | __u16 port_min; /* source port range */ |
133 | __u16 port_max; | |
d342894c | 134 | __u8 tos; /* TOS override */ |
135 | __u8 ttl; | |
e4f67add | 136 | u32 flags; /* VXLAN_F_* below */ |
d342894c | 137 | |
1c51a915 | 138 | struct work_struct sock_work; |
7c47cedf | 139 | struct work_struct igmp_work; |
1c51a915 | 140 | |
d342894c | 141 | unsigned long age_interval; |
142 | struct timer_list age_timer; | |
143 | spinlock_t hash_lock; | |
144 | unsigned int addrcnt; | |
145 | unsigned int addrmax; | |
d342894c | 146 | |
147 | struct hlist_head fdb_head[FDB_HASH_SIZE]; | |
148 | }; | |
149 | ||
e4f67add DS |
150 | #define VXLAN_F_LEARN 0x01 |
151 | #define VXLAN_F_PROXY 0x02 | |
152 | #define VXLAN_F_RSC 0x04 | |
153 | #define VXLAN_F_L2MISS 0x08 | |
154 | #define VXLAN_F_L3MISS 0x10 | |
155 | ||
d342894c | 156 | /* salt for hash table */ |
157 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 158 | static struct workqueue_struct *vxlan_wq; |
d342894c | 159 | |
1c51a915 SH |
160 | static void vxlan_sock_work(struct work_struct *work); |
161 | ||
553675fb | 162 | /* Virtual Network hash table head */ |
163 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
164 | { | |
165 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
166 | } | |
167 | ||
168 | /* Socket hash table head */ | |
169 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 170 | { |
171 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
172 | ||
553675fb | 173 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
174 | } | |
175 | ||
3e61aa8f SH |
176 | /* First remote destination for a forwarding entry. |
177 | * Guaranteed to be non-NULL because remotes are never deleted. | |
178 | */ | |
179 | static inline struct vxlan_rdst *first_remote(struct vxlan_fdb *fdb) | |
180 | { | |
181 | return list_first_or_null_rcu(&fdb->remotes, struct vxlan_rdst, list); | |
182 | } | |
183 | ||
553675fb | 184 | /* Find VXLAN socket based on network namespace and UDP port */ |
185 | static struct vxlan_sock *vxlan_find_port(struct net *net, __be16 port) | |
186 | { | |
187 | struct vxlan_sock *vs; | |
188 | ||
189 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
190 | if (inet_sk(vs->sock->sk)->inet_sport == port) | |
191 | return vs; | |
192 | } | |
193 | return NULL; | |
d342894c | 194 | } |
195 | ||
196 | /* Look up VNI in a per net namespace table */ | |
553675fb | 197 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, __be16 port) |
d342894c | 198 | { |
553675fb | 199 | struct vxlan_sock *vs; |
d342894c | 200 | struct vxlan_dev *vxlan; |
d342894c | 201 | |
553675fb | 202 | vs = vxlan_find_port(net, port); |
203 | if (!vs) | |
204 | return NULL; | |
205 | ||
206 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { | |
c7995c43 | 207 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 208 | return vxlan; |
209 | } | |
210 | ||
211 | return NULL; | |
212 | } | |
213 | ||
214 | /* Fill in neighbour message in skbuff. */ | |
215 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
216 | const struct vxlan_fdb *fdb, |
217 | u32 portid, u32 seq, int type, unsigned int flags, | |
218 | const struct vxlan_rdst *rdst) | |
d342894c | 219 | { |
220 | unsigned long now = jiffies; | |
221 | struct nda_cacheinfo ci; | |
222 | struct nlmsghdr *nlh; | |
223 | struct ndmsg *ndm; | |
e4f67add | 224 | bool send_ip, send_eth; |
d342894c | 225 | |
226 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
227 | if (nlh == NULL) | |
228 | return -EMSGSIZE; | |
229 | ||
230 | ndm = nlmsg_data(nlh); | |
231 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
232 | |
233 | send_eth = send_ip = true; | |
234 | ||
235 | if (type == RTM_GETNEIGH) { | |
236 | ndm->ndm_family = AF_INET; | |
6681712d | 237 | send_ip = rdst->remote_ip != htonl(INADDR_ANY); |
e4f67add DS |
238 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
239 | } else | |
240 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 241 | ndm->ndm_state = fdb->state; |
242 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 243 | ndm->ndm_flags = fdb->flags; |
d342894c | 244 | ndm->ndm_type = NDA_DST; |
245 | ||
e4f67add | 246 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 247 | goto nla_put_failure; |
248 | ||
6681712d DS |
249 | if (send_ip && nla_put_be32(skb, NDA_DST, rdst->remote_ip)) |
250 | goto nla_put_failure; | |
251 | ||
823aa873 | 252 | if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && |
6681712d DS |
253 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
254 | goto nla_put_failure; | |
c7995c43 | 255 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 256 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
257 | goto nla_put_failure; |
258 | if (rdst->remote_ifindex && | |
259 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 260 | goto nla_put_failure; |
261 | ||
262 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
263 | ci.ndm_confirmed = 0; | |
264 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
265 | ci.ndm_refcnt = 0; | |
266 | ||
267 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
268 | goto nla_put_failure; | |
269 | ||
270 | return nlmsg_end(skb, nlh); | |
271 | ||
272 | nla_put_failure: | |
273 | nlmsg_cancel(skb, nlh); | |
274 | return -EMSGSIZE; | |
275 | } | |
276 | ||
277 | static inline size_t vxlan_nlmsg_size(void) | |
278 | { | |
279 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
280 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
281 | + nla_total_size(sizeof(__be32)) /* NDA_DST */ | |
73cf3317 | 282 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
283 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
284 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
d342894c | 285 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
286 | } | |
287 | ||
288 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, | |
3e61aa8f | 289 | struct vxlan_fdb *fdb, int type) |
d342894c | 290 | { |
291 | struct net *net = dev_net(vxlan->dev); | |
292 | struct sk_buff *skb; | |
293 | int err = -ENOBUFS; | |
294 | ||
295 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
296 | if (skb == NULL) | |
297 | goto errout; | |
298 | ||
3e61aa8f | 299 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, first_remote(fdb)); |
d342894c | 300 | if (err < 0) { |
301 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
302 | WARN_ON(err == -EMSGSIZE); | |
303 | kfree_skb(skb); | |
304 | goto errout; | |
305 | } | |
306 | ||
307 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
308 | return; | |
309 | errout: | |
310 | if (err < 0) | |
311 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
312 | } | |
313 | ||
e4f67add DS |
314 | static void vxlan_ip_miss(struct net_device *dev, __be32 ipa) |
315 | { | |
316 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
317 | struct vxlan_fdb f = { |
318 | .state = NUD_STALE, | |
319 | }; | |
320 | struct vxlan_rdst remote = { | |
321 | .remote_ip = ipa, /* goes to NDA_DST */ | |
322 | .remote_vni = VXLAN_N_VID, | |
323 | }; | |
3e61aa8f SH |
324 | |
325 | INIT_LIST_HEAD(&f.remotes); | |
326 | list_add_rcu(&remote.list, &f.remotes); | |
e4f67add DS |
327 | |
328 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
329 | } | |
330 | ||
331 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
332 | { | |
bb3fd687 SH |
333 | struct vxlan_fdb f = { |
334 | .state = NUD_STALE, | |
335 | }; | |
e4f67add | 336 | |
3e61aa8f | 337 | INIT_LIST_HEAD(&f.remotes); |
e4f67add DS |
338 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
339 | ||
340 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
341 | } | |
342 | ||
d342894c | 343 | /* Hash Ethernet address */ |
344 | static u32 eth_hash(const unsigned char *addr) | |
345 | { | |
346 | u64 value = get_unaligned((u64 *)addr); | |
347 | ||
348 | /* only want 6 bytes */ | |
349 | #ifdef __BIG_ENDIAN | |
d342894c | 350 | value >>= 16; |
321fb991 | 351 | #else |
352 | value <<= 16; | |
d342894c | 353 | #endif |
354 | return hash_64(value, FDB_HASH_BITS); | |
355 | } | |
356 | ||
357 | /* Hash chain to use given mac address */ | |
358 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
359 | const u8 *mac) | |
360 | { | |
361 | return &vxlan->fdb_head[eth_hash(mac)]; | |
362 | } | |
363 | ||
364 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 365 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 366 | const u8 *mac) |
367 | ||
368 | { | |
369 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
370 | struct vxlan_fdb *f; | |
d342894c | 371 | |
b67bfe0d | 372 | hlist_for_each_entry_rcu(f, head, hlist) { |
d342894c | 373 | if (compare_ether_addr(mac, f->eth_addr) == 0) |
374 | return f; | |
375 | } | |
376 | ||
377 | return NULL; | |
378 | } | |
379 | ||
014be2c8 SS |
380 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
381 | const u8 *mac) | |
382 | { | |
383 | struct vxlan_fdb *f; | |
384 | ||
385 | f = __vxlan_find_mac(vxlan, mac); | |
386 | if (f) | |
387 | f->used = jiffies; | |
388 | ||
389 | return f; | |
390 | } | |
391 | ||
a5e7c10a MR |
392 | /* caller should hold vxlan->hash_lock */ |
393 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
394 | __be32 ip, __be16 port, | |
395 | __u32 vni, __u32 ifindex) | |
6681712d | 396 | { |
3e61aa8f | 397 | struct vxlan_rdst *rd; |
6681712d | 398 | |
3e61aa8f | 399 | list_for_each_entry(rd, &f->remotes, list) { |
6681712d DS |
400 | if (rd->remote_ip == ip && |
401 | rd->remote_port == port && | |
402 | rd->remote_vni == vni && | |
403 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 404 | return rd; |
6681712d | 405 | } |
3e61aa8f | 406 | |
a5e7c10a MR |
407 | return NULL; |
408 | } | |
409 | ||
410 | /* Add/update destinations for multicast */ | |
411 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
412 | __be32 ip, __be16 port, __u32 vni, __u32 ifindex) | |
413 | { | |
414 | struct vxlan_rdst *rd; | |
415 | ||
416 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
417 | if (rd) | |
418 | return 0; | |
419 | ||
6681712d DS |
420 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
421 | if (rd == NULL) | |
422 | return -ENOBUFS; | |
423 | rd->remote_ip = ip; | |
424 | rd->remote_port = port; | |
425 | rd->remote_vni = vni; | |
426 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
427 | |
428 | list_add_tail_rcu(&rd->list, &f->remotes); | |
429 | ||
6681712d DS |
430 | return 1; |
431 | } | |
432 | ||
d342894c | 433 | /* Add new entry to forwarding table -- assumes lock held */ |
434 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
435 | const u8 *mac, __be32 ip, | |
6681712d | 436 | __u16 state, __u16 flags, |
73cf3317 | 437 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 438 | __u8 ndm_flags) |
d342894c | 439 | { |
440 | struct vxlan_fdb *f; | |
441 | int notify = 0; | |
442 | ||
014be2c8 | 443 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 444 | if (f) { |
445 | if (flags & NLM_F_EXCL) { | |
446 | netdev_dbg(vxlan->dev, | |
447 | "lost race to create %pM\n", mac); | |
448 | return -EEXIST; | |
449 | } | |
450 | if (f->state != state) { | |
451 | f->state = state; | |
452 | f->updated = jiffies; | |
453 | notify = 1; | |
454 | } | |
ae884082 DS |
455 | if (f->flags != ndm_flags) { |
456 | f->flags = ndm_flags; | |
457 | f->updated = jiffies; | |
458 | notify = 1; | |
459 | } | |
6681712d | 460 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
461 | (is_multicast_ether_addr(f->eth_addr) || |
462 | is_zero_ether_addr(f->eth_addr))) { | |
6681712d DS |
463 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex); |
464 | ||
465 | if (rc < 0) | |
466 | return rc; | |
467 | notify |= rc; | |
468 | } | |
d342894c | 469 | } else { |
470 | if (!(flags & NLM_F_CREATE)) | |
471 | return -ENOENT; | |
472 | ||
473 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
474 | return -ENOSPC; | |
475 | ||
476 | netdev_dbg(vxlan->dev, "add %pM -> %pI4\n", mac, &ip); | |
477 | f = kmalloc(sizeof(*f), GFP_ATOMIC); | |
478 | if (!f) | |
479 | return -ENOMEM; | |
480 | ||
481 | notify = 1; | |
d342894c | 482 | f->state = state; |
ae884082 | 483 | f->flags = ndm_flags; |
d342894c | 484 | f->updated = f->used = jiffies; |
3e61aa8f | 485 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 486 | memcpy(f->eth_addr, mac, ETH_ALEN); |
487 | ||
3e61aa8f SH |
488 | vxlan_fdb_append(f, ip, port, vni, ifindex); |
489 | ||
d342894c | 490 | ++vxlan->addrcnt; |
491 | hlist_add_head_rcu(&f->hlist, | |
492 | vxlan_fdb_head(vxlan, mac)); | |
493 | } | |
494 | ||
495 | if (notify) | |
496 | vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH); | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
bc7892ba MR |
501 | static void vxlan_fdb_free_rdst(struct rcu_head *head) |
502 | { | |
503 | struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); | |
504 | kfree(rd); | |
505 | } | |
506 | ||
6706c82e | 507 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
508 | { |
509 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 510 | struct vxlan_rdst *rd, *nd; |
6681712d | 511 | |
3e61aa8f | 512 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 513 | kfree(rd); |
6681712d DS |
514 | kfree(f); |
515 | } | |
516 | ||
d342894c | 517 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
518 | { | |
519 | netdev_dbg(vxlan->dev, | |
520 | "delete %pM\n", f->eth_addr); | |
521 | ||
522 | --vxlan->addrcnt; | |
523 | vxlan_fdb_notify(vxlan, f, RTM_DELNEIGH); | |
524 | ||
525 | hlist_del_rcu(&f->hlist); | |
6681712d | 526 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 527 | } |
528 | ||
f0b074be MR |
529 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
530 | __be32 *ip, __be16 *port, u32 *vni, u32 *ifindex) | |
d342894c | 531 | { |
6681712d | 532 | struct net *net = dev_net(vxlan->dev); |
d342894c | 533 | |
f0b074be MR |
534 | if (tb[NDA_DST]) { |
535 | if (nla_len(tb[NDA_DST]) != sizeof(__be32)) | |
536 | return -EAFNOSUPPORT; | |
d342894c | 537 | |
f0b074be MR |
538 | *ip = nla_get_be32(tb[NDA_DST]); |
539 | } else { | |
540 | *ip = htonl(INADDR_ANY); | |
541 | } | |
d342894c | 542 | |
6681712d | 543 | if (tb[NDA_PORT]) { |
73cf3317 | 544 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 545 | return -EINVAL; |
f0b074be MR |
546 | *port = nla_get_be16(tb[NDA_PORT]); |
547 | } else { | |
548 | *port = vxlan->dst_port; | |
549 | } | |
6681712d DS |
550 | |
551 | if (tb[NDA_VNI]) { | |
552 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
553 | return -EINVAL; | |
f0b074be MR |
554 | *vni = nla_get_u32(tb[NDA_VNI]); |
555 | } else { | |
556 | *vni = vxlan->default_dst.remote_vni; | |
557 | } | |
6681712d DS |
558 | |
559 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 560 | struct net_device *tdev; |
6681712d DS |
561 | |
562 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
563 | return -EINVAL; | |
f0b074be MR |
564 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
565 | tdev = dev_get_by_index(net, *ifindex); | |
5abb0029 | 566 | if (!tdev) |
6681712d | 567 | return -EADDRNOTAVAIL; |
5abb0029 | 568 | dev_put(tdev); |
f0b074be MR |
569 | } else { |
570 | *ifindex = 0; | |
571 | } | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | /* Add static entry (via netlink) */ | |
577 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
578 | struct net_device *dev, | |
579 | const unsigned char *addr, u16 flags) | |
580 | { | |
581 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
582 | /* struct net *net = dev_net(vxlan->dev); */ | |
583 | __be32 ip; | |
584 | __be16 port; | |
585 | u32 vni, ifindex; | |
586 | int err; | |
587 | ||
588 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
589 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
590 | ndm->ndm_state); | |
591 | return -EINVAL; | |
592 | } | |
593 | ||
594 | if (tb[NDA_DST] == NULL) | |
595 | return -EINVAL; | |
596 | ||
597 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
598 | if (err) | |
599 | return err; | |
6681712d | 600 | |
d342894c | 601 | spin_lock_bh(&vxlan->hash_lock); |
73cf3317 | 602 | err = vxlan_fdb_create(vxlan, addr, ip, ndm->ndm_state, flags, |
603 | port, vni, ifindex, ndm->ndm_flags); | |
d342894c | 604 | spin_unlock_bh(&vxlan->hash_lock); |
605 | ||
606 | return err; | |
607 | } | |
608 | ||
609 | /* Delete entry (via netlink) */ | |
1690be63 VY |
610 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
611 | struct net_device *dev, | |
d342894c | 612 | const unsigned char *addr) |
613 | { | |
614 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
615 | struct vxlan_fdb *f; | |
bc7892ba MR |
616 | struct vxlan_rdst *rd = NULL; |
617 | __be32 ip; | |
618 | __be16 port; | |
619 | u32 vni, ifindex; | |
620 | int err; | |
621 | ||
622 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
623 | if (err) | |
624 | return err; | |
625 | ||
626 | err = -ENOENT; | |
d342894c | 627 | |
628 | spin_lock_bh(&vxlan->hash_lock); | |
629 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
630 | if (!f) |
631 | goto out; | |
632 | ||
633 | if (ip != htonl(INADDR_ANY)) { | |
634 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
635 | if (!rd) | |
636 | goto out; | |
637 | } | |
638 | ||
639 | err = 0; | |
640 | ||
641 | /* remove a destination if it's not the only one on the list, | |
642 | * otherwise destroy the fdb entry | |
643 | */ | |
644 | if (rd && !list_is_singular(&f->remotes)) { | |
645 | list_del_rcu(&rd->list); | |
646 | call_rcu(&rd->rcu, vxlan_fdb_free_rdst); | |
647 | goto out; | |
d342894c | 648 | } |
bc7892ba MR |
649 | |
650 | vxlan_fdb_destroy(vxlan, f); | |
651 | ||
652 | out: | |
d342894c | 653 | spin_unlock_bh(&vxlan->hash_lock); |
654 | ||
655 | return err; | |
656 | } | |
657 | ||
658 | /* Dump forwarding table */ | |
659 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
660 | struct net_device *dev, int idx) | |
661 | { | |
662 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
663 | unsigned int h; | |
664 | ||
665 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
666 | struct vxlan_fdb *f; | |
d342894c | 667 | int err; |
668 | ||
b67bfe0d | 669 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 670 | struct vxlan_rdst *rd; |
6681712d | 671 | |
3e61aa8f SH |
672 | if (idx < cb->args[0]) |
673 | goto skip; | |
674 | ||
675 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
676 | err = vxlan_fdb_info(skb, vxlan, f, |
677 | NETLINK_CB(cb->skb).portid, | |
678 | cb->nlh->nlmsg_seq, | |
679 | RTM_NEWNEIGH, | |
680 | NLM_F_MULTI, rd); | |
681 | if (err < 0) | |
3e61aa8f | 682 | goto out; |
6681712d | 683 | } |
3e61aa8f SH |
684 | skip: |
685 | ++idx; | |
d342894c | 686 | } |
687 | } | |
3e61aa8f | 688 | out: |
d342894c | 689 | return idx; |
690 | } | |
691 | ||
692 | /* Watch incoming packets to learn mapping between Ethernet address | |
693 | * and Tunnel endpoint. | |
26a41ae6 | 694 | * Return true if packet is bogus and should be droppped. |
d342894c | 695 | */ |
26a41ae6 | 696 | static bool vxlan_snoop(struct net_device *dev, |
d342894c | 697 | __be32 src_ip, const u8 *src_mac) |
698 | { | |
699 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
700 | struct vxlan_fdb *f; | |
d342894c | 701 | |
702 | f = vxlan_find_mac(vxlan, src_mac); | |
703 | if (likely(f)) { | |
3e61aa8f SH |
704 | struct vxlan_rdst *rdst = first_remote(f); |
705 | ||
706 | if (likely(rdst->remote_ip == src_ip)) | |
26a41ae6 | 707 | return false; |
708 | ||
709 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 710 | if (f->state & NUD_NOARP) |
26a41ae6 | 711 | return true; |
d342894c | 712 | |
713 | if (net_ratelimit()) | |
714 | netdev_info(dev, | |
715 | "%pM migrated from %pI4 to %pI4\n", | |
3e61aa8f | 716 | src_mac, &rdst->remote_ip, &src_ip); |
d342894c | 717 | |
3e61aa8f | 718 | rdst->remote_ip = src_ip; |
d342894c | 719 | f->updated = jiffies; |
8385f50a | 720 | vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH); |
d342894c | 721 | } else { |
722 | /* learned new entry */ | |
723 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 724 | |
725 | /* close off race between vxlan_flush and incoming packets */ | |
726 | if (netif_running(dev)) | |
727 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
728 | NUD_REACHABLE, | |
729 | NLM_F_EXCL|NLM_F_CREATE, | |
730 | vxlan->dst_port, | |
731 | vxlan->default_dst.remote_vni, | |
732 | 0, NTF_SELF); | |
d342894c | 733 | spin_unlock(&vxlan->hash_lock); |
734 | } | |
26a41ae6 | 735 | |
736 | return false; | |
d342894c | 737 | } |
738 | ||
739 | ||
740 | /* See if multicast group is already in use by other ID */ | |
7c47cedf | 741 | static bool vxlan_group_used(struct vxlan_net *vn, __be32 remote_ip) |
d342894c | 742 | { |
553675fb | 743 | struct vxlan_dev *vxlan; |
d342894c | 744 | |
553675fb | 745 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
553675fb | 746 | if (!netif_running(vxlan->dev)) |
747 | continue; | |
d342894c | 748 | |
7c47cedf | 749 | if (vxlan->default_dst.remote_ip == remote_ip) |
553675fb | 750 | return true; |
751 | } | |
d342894c | 752 | |
753 | return false; | |
754 | } | |
755 | ||
7c47cedf | 756 | static void vxlan_sock_hold(struct vxlan_sock *vs) |
d342894c | 757 | { |
7c47cedf SH |
758 | atomic_inc(&vs->refcnt); |
759 | } | |
d342894c | 760 | |
1c51a915 | 761 | static void vxlan_sock_release(struct vxlan_net *vn, struct vxlan_sock *vs) |
7c47cedf SH |
762 | { |
763 | if (!atomic_dec_and_test(&vs->refcnt)) | |
764 | return; | |
d342894c | 765 | |
1c51a915 | 766 | spin_lock(&vn->sock_lock); |
7c47cedf | 767 | hlist_del_rcu(&vs->hlist); |
1c51a915 SH |
768 | spin_unlock(&vn->sock_lock); |
769 | ||
7c47cedf | 770 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 771 | } |
772 | ||
7c47cedf SH |
773 | /* Callback to update multicast group membership. |
774 | * Scheduled when vxlan goes up/down. | |
775 | */ | |
776 | static void vxlan_igmp_work(struct work_struct *work) | |
d342894c | 777 | { |
7c47cedf SH |
778 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_work); |
779 | struct vxlan_net *vn = net_generic(dev_net(vxlan->dev), vxlan_net_id); | |
780 | struct vxlan_sock *vs = vxlan->vn_sock; | |
781 | struct sock *sk = vs->sock->sk; | |
d342894c | 782 | struct ip_mreqn mreq = { |
c7995c43 AW |
783 | .imr_multiaddr.s_addr = vxlan->default_dst.remote_ip, |
784 | .imr_ifindex = vxlan->default_dst.remote_ifindex, | |
d342894c | 785 | }; |
786 | ||
d342894c | 787 | lock_sock(sk); |
7c47cedf SH |
788 | if (vxlan_group_used(vn, vxlan->default_dst.remote_ip)) |
789 | ip_mc_join_group(sk, &mreq); | |
790 | else | |
791 | ip_mc_leave_group(sk, &mreq); | |
d342894c | 792 | release_sock(sk); |
d342894c | 793 | |
1c51a915 | 794 | vxlan_sock_release(vn, vs); |
7c47cedf | 795 | dev_put(vxlan->dev); |
d342894c | 796 | } |
797 | ||
798 | /* Callback from net/ipv4/udp.c to receive packets */ | |
799 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
800 | { | |
801 | struct iphdr *oip; | |
802 | struct vxlanhdr *vxh; | |
803 | struct vxlan_dev *vxlan; | |
e8171045 | 804 | struct pcpu_tstats *stats; |
553675fb | 805 | __be16 port; |
d342894c | 806 | __u32 vni; |
807 | int err; | |
808 | ||
809 | /* pop off outer UDP header */ | |
810 | __skb_pull(skb, sizeof(struct udphdr)); | |
811 | ||
812 | /* Need Vxlan and inner Ethernet header to be present */ | |
813 | if (!pskb_may_pull(skb, sizeof(struct vxlanhdr))) | |
814 | goto error; | |
815 | ||
816 | /* Drop packets with reserved bits set */ | |
817 | vxh = (struct vxlanhdr *) skb->data; | |
818 | if (vxh->vx_flags != htonl(VXLAN_FLAGS) || | |
819 | (vxh->vx_vni & htonl(0xff))) { | |
820 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
821 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
822 | goto error; | |
823 | } | |
824 | ||
825 | __skb_pull(skb, sizeof(struct vxlanhdr)); | |
d342894c | 826 | |
827 | /* Is this VNI defined? */ | |
828 | vni = ntohl(vxh->vx_vni) >> 8; | |
553675fb | 829 | port = inet_sk(sk)->inet_sport; |
830 | vxlan = vxlan_find_vni(sock_net(sk), vni, port); | |
d342894c | 831 | if (!vxlan) { |
553675fb | 832 | netdev_dbg(skb->dev, "unknown vni %d port %u\n", |
833 | vni, ntohs(port)); | |
d342894c | 834 | goto drop; |
835 | } | |
836 | ||
837 | if (!pskb_may_pull(skb, ETH_HLEN)) { | |
838 | vxlan->dev->stats.rx_length_errors++; | |
839 | vxlan->dev->stats.rx_errors++; | |
840 | goto drop; | |
841 | } | |
842 | ||
e4f67add DS |
843 | skb_reset_mac_header(skb); |
844 | ||
d342894c | 845 | /* Re-examine inner Ethernet packet */ |
846 | oip = ip_hdr(skb); | |
847 | skb->protocol = eth_type_trans(skb, vxlan->dev); | |
d342894c | 848 | |
849 | /* Ignore packet loops (and multicast echo) */ | |
850 | if (compare_ether_addr(eth_hdr(skb)->h_source, | |
851 | vxlan->dev->dev_addr) == 0) | |
852 | goto drop; | |
853 | ||
26a41ae6 | 854 | if ((vxlan->flags & VXLAN_F_LEARN) && |
855 | vxlan_snoop(skb->dev, oip->saddr, eth_hdr(skb)->h_source)) | |
856 | goto drop; | |
d342894c | 857 | |
858 | __skb_tunnel_rx(skb, vxlan->dev); | |
859 | skb_reset_network_header(skb); | |
0afb1666 JG |
860 | |
861 | /* If the NIC driver gave us an encapsulated packet with | |
862 | * CHECKSUM_UNNECESSARY and Rx checksum feature is enabled, | |
863 | * leave the CHECKSUM_UNNECESSARY, the device checksummed it | |
864 | * for us. Otherwise force the upper layers to verify it. | |
865 | */ | |
866 | if (skb->ip_summed != CHECKSUM_UNNECESSARY || !skb->encapsulation || | |
867 | !(vxlan->dev->features & NETIF_F_RXCSUM)) | |
868 | skb->ip_summed = CHECKSUM_NONE; | |
869 | ||
870 | skb->encapsulation = 0; | |
d342894c | 871 | |
872 | err = IP_ECN_decapsulate(oip, skb); | |
873 | if (unlikely(err)) { | |
874 | if (log_ecn_error) | |
875 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
876 | &oip->saddr, oip->tos); | |
877 | if (err > 1) { | |
878 | ++vxlan->dev->stats.rx_frame_errors; | |
879 | ++vxlan->dev->stats.rx_errors; | |
880 | goto drop; | |
881 | } | |
882 | } | |
883 | ||
e8171045 | 884 | stats = this_cpu_ptr(vxlan->dev->tstats); |
d342894c | 885 | u64_stats_update_begin(&stats->syncp); |
886 | stats->rx_packets++; | |
887 | stats->rx_bytes += skb->len; | |
888 | u64_stats_update_end(&stats->syncp); | |
889 | ||
890 | netif_rx(skb); | |
891 | ||
892 | return 0; | |
893 | error: | |
894 | /* Put UDP header back */ | |
895 | __skb_push(skb, sizeof(struct udphdr)); | |
896 | ||
897 | return 1; | |
898 | drop: | |
899 | /* Consume bad packet */ | |
900 | kfree_skb(skb); | |
901 | return 0; | |
902 | } | |
903 | ||
e4f67add DS |
904 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
905 | { | |
906 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
907 | struct arphdr *parp; | |
908 | u8 *arpptr, *sha; | |
909 | __be32 sip, tip; | |
910 | struct neighbour *n; | |
911 | ||
912 | if (dev->flags & IFF_NOARP) | |
913 | goto out; | |
914 | ||
915 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
916 | dev->stats.tx_dropped++; | |
917 | goto out; | |
918 | } | |
919 | parp = arp_hdr(skb); | |
920 | ||
921 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
922 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
923 | parp->ar_pro != htons(ETH_P_IP) || | |
924 | parp->ar_op != htons(ARPOP_REQUEST) || | |
925 | parp->ar_hln != dev->addr_len || | |
926 | parp->ar_pln != 4) | |
927 | goto out; | |
928 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
929 | sha = arpptr; | |
930 | arpptr += dev->addr_len; /* sha */ | |
931 | memcpy(&sip, arpptr, sizeof(sip)); | |
932 | arpptr += sizeof(sip); | |
933 | arpptr += dev->addr_len; /* tha */ | |
934 | memcpy(&tip, arpptr, sizeof(tip)); | |
935 | ||
936 | if (ipv4_is_loopback(tip) || | |
937 | ipv4_is_multicast(tip)) | |
938 | goto out; | |
939 | ||
940 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
941 | ||
942 | if (n) { | |
e4f67add DS |
943 | struct vxlan_fdb *f; |
944 | struct sk_buff *reply; | |
945 | ||
946 | if (!(n->nud_state & NUD_CONNECTED)) { | |
947 | neigh_release(n); | |
948 | goto out; | |
949 | } | |
950 | ||
951 | f = vxlan_find_mac(vxlan, n->ha); | |
3e61aa8f | 952 | if (f && first_remote(f)->remote_ip == htonl(INADDR_ANY)) { |
e4f67add DS |
953 | /* bridge-local neighbor */ |
954 | neigh_release(n); | |
955 | goto out; | |
956 | } | |
957 | ||
958 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
959 | n->ha, sha); | |
960 | ||
961 | neigh_release(n); | |
962 | ||
963 | skb_reset_mac_header(reply); | |
964 | __skb_pull(reply, skb_network_offset(reply)); | |
965 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
966 | reply->pkt_type = PACKET_HOST; | |
967 | ||
968 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
969 | dev->stats.rx_dropped++; | |
970 | } else if (vxlan->flags & VXLAN_F_L3MISS) | |
971 | vxlan_ip_miss(dev, tip); | |
972 | out: | |
973 | consume_skb(skb); | |
974 | return NETDEV_TX_OK; | |
975 | } | |
976 | ||
977 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) | |
978 | { | |
979 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
980 | struct neighbour *n; | |
981 | struct iphdr *pip; | |
982 | ||
983 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
984 | return false; | |
985 | ||
986 | n = NULL; | |
987 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
988 | case ETH_P_IP: | |
989 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) | |
990 | return false; | |
991 | pip = ip_hdr(skb); | |
992 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
993 | break; | |
994 | default: | |
995 | return false; | |
996 | } | |
997 | ||
998 | if (n) { | |
999 | bool diff; | |
1000 | ||
1001 | diff = compare_ether_addr(eth_hdr(skb)->h_dest, n->ha) != 0; | |
1002 | if (diff) { | |
1003 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1004 | dev->addr_len); | |
1005 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1006 | } | |
1007 | neigh_release(n); | |
1008 | return diff; | |
1009 | } else if (vxlan->flags & VXLAN_F_L3MISS) | |
1010 | vxlan_ip_miss(dev, pip->daddr); | |
1011 | return false; | |
1012 | } | |
1013 | ||
553675fb | 1014 | static void vxlan_sock_put(struct sk_buff *skb) |
1cad8715 | 1015 | { |
1016 | sock_put(skb->sk); | |
1017 | } | |
1018 | ||
1019 | /* On transmit, associate with the tunnel socket */ | |
1020 | static void vxlan_set_owner(struct net_device *dev, struct sk_buff *skb) | |
1021 | { | |
553675fb | 1022 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1023 | struct sock *sk = vxlan->vn_sock->sock->sk; | |
1cad8715 | 1024 | |
1025 | skb_orphan(skb); | |
1026 | sock_hold(sk); | |
1027 | skb->sk = sk; | |
553675fb | 1028 | skb->destructor = vxlan_sock_put; |
1cad8715 | 1029 | } |
1030 | ||
05f47d69 | 1031 | /* Compute source port for outgoing packet |
1032 | * first choice to use L4 flow hash since it will spread | |
1033 | * better and maybe available from hardware | |
1034 | * secondary choice is to use jhash on the Ethernet header | |
1035 | */ | |
7d836a76 | 1036 | static __be16 vxlan_src_port(const struct vxlan_dev *vxlan, struct sk_buff *skb) |
05f47d69 | 1037 | { |
1038 | unsigned int range = (vxlan->port_max - vxlan->port_min) + 1; | |
1039 | u32 hash; | |
1040 | ||
1041 | hash = skb_get_rxhash(skb); | |
1042 | if (!hash) | |
1043 | hash = jhash(skb->data, 2 * ETH_ALEN, | |
1044 | (__force u32) skb->protocol); | |
1045 | ||
7d836a76 | 1046 | return htons((((u64) hash * range) >> 32) + vxlan->port_min); |
05f47d69 | 1047 | } |
1048 | ||
05c0db08 PS |
1049 | static int handle_offloads(struct sk_buff *skb) |
1050 | { | |
1051 | if (skb_is_gso(skb)) { | |
1052 | int err = skb_unclone(skb, GFP_ATOMIC); | |
1053 | if (unlikely(err)) | |
1054 | return err; | |
1055 | ||
f6ace502 | 1056 | skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL; |
05c0db08 PS |
1057 | } else if (skb->ip_summed != CHECKSUM_PARTIAL) |
1058 | skb->ip_summed = CHECKSUM_NONE; | |
1059 | ||
1060 | return 0; | |
1061 | } | |
1062 | ||
9dcc71e1 SS |
1063 | /* Bypass encapsulation if the destination is local */ |
1064 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1065 | struct vxlan_dev *dst_vxlan) | |
1066 | { | |
1067 | struct pcpu_tstats *tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); | |
1068 | struct pcpu_tstats *rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
1069 | ||
1070 | skb->pkt_type = PACKET_HOST; | |
1071 | skb->encapsulation = 0; | |
1072 | skb->dev = dst_vxlan->dev; | |
1073 | __skb_pull(skb, skb_network_offset(skb)); | |
1074 | ||
1075 | if (dst_vxlan->flags & VXLAN_F_LEARN) | |
9d9f163c MR |
1076 | vxlan_snoop(skb->dev, htonl(INADDR_LOOPBACK), |
1077 | eth_hdr(skb)->h_source); | |
9dcc71e1 SS |
1078 | |
1079 | u64_stats_update_begin(&tx_stats->syncp); | |
1080 | tx_stats->tx_packets++; | |
1081 | tx_stats->tx_bytes += skb->len; | |
1082 | u64_stats_update_end(&tx_stats->syncp); | |
1083 | ||
1084 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1085 | u64_stats_update_begin(&rx_stats->syncp); | |
1086 | rx_stats->rx_packets++; | |
1087 | rx_stats->rx_bytes += skb->len; | |
1088 | u64_stats_update_end(&rx_stats->syncp); | |
1089 | } else { | |
1090 | skb->dev->stats.rx_dropped++; | |
1091 | } | |
1092 | } | |
1093 | ||
4ad16930 SH |
1094 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1095 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1096 | { |
1097 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1098 | struct rtable *rt; | |
d342894c | 1099 | const struct iphdr *old_iph; |
d342894c | 1100 | struct vxlanhdr *vxh; |
1101 | struct udphdr *uh; | |
1102 | struct flowi4 fl4; | |
d342894c | 1103 | __be32 dst; |
7d836a76 | 1104 | __be16 src_port, dst_port; |
234f5b73 | 1105 | u32 vni; |
d342894c | 1106 | __be16 df = 0; |
1107 | __u8 tos, ttl; | |
0e6fbc5b | 1108 | int err; |
d342894c | 1109 | |
823aa873 | 1110 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; |
6681712d DS |
1111 | vni = rdst->remote_vni; |
1112 | dst = rdst->remote_ip; | |
e4f67add DS |
1113 | |
1114 | if (!dst) { | |
1115 | if (did_rsc) { | |
e4f67add | 1116 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1117 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1118 | return; |
e4f67add | 1119 | } |
ef59febe | 1120 | goto drop; |
e4f67add | 1121 | } |
ef59febe | 1122 | |
d6727fe3 JG |
1123 | if (!skb->encapsulation) { |
1124 | skb_reset_inner_headers(skb); | |
1125 | skb->encapsulation = 1; | |
1126 | } | |
1127 | ||
d342894c | 1128 | /* Need space for new headers (invalidates iph ptr) */ |
1129 | if (skb_cow_head(skb, VXLAN_HEADROOM)) | |
1130 | goto drop; | |
1131 | ||
d342894c | 1132 | old_iph = ip_hdr(skb); |
1133 | ||
d342894c | 1134 | ttl = vxlan->ttl; |
1135 | if (!ttl && IN_MULTICAST(ntohl(dst))) | |
1136 | ttl = 1; | |
1137 | ||
1138 | tos = vxlan->tos; | |
1139 | if (tos == 1) | |
206aaafc | 1140 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1141 | |
05f47d69 | 1142 | src_port = vxlan_src_port(vxlan, skb); |
d342894c | 1143 | |
ca78f181 | 1144 | memset(&fl4, 0, sizeof(fl4)); |
6681712d | 1145 | fl4.flowi4_oif = rdst->remote_ifindex; |
ca78f181 | 1146 | fl4.flowi4_tos = RT_TOS(tos); |
1147 | fl4.daddr = dst; | |
1148 | fl4.saddr = vxlan->saddr; | |
1149 | ||
1150 | rt = ip_route_output_key(dev_net(dev), &fl4); | |
d342894c | 1151 | if (IS_ERR(rt)) { |
1152 | netdev_dbg(dev, "no route to %pI4\n", &dst); | |
1153 | dev->stats.tx_carrier_errors++; | |
1154 | goto tx_error; | |
1155 | } | |
1156 | ||
1157 | if (rt->dst.dev == dev) { | |
1158 | netdev_dbg(dev, "circular route to %pI4\n", &dst); | |
1159 | ip_rt_put(rt); | |
1160 | dev->stats.collisions++; | |
1161 | goto tx_error; | |
1162 | } | |
1163 | ||
9dcc71e1 | 1164 | /* Bypass encapsulation if the destination is local */ |
ab09a6d0 MR |
1165 | if (rt->rt_flags & RTCF_LOCAL && |
1166 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
9dcc71e1 SS |
1167 | struct vxlan_dev *dst_vxlan; |
1168 | ||
1169 | ip_rt_put(rt); | |
553675fb | 1170 | dst_vxlan = vxlan_find_vni(dev_net(dev), vni, dst_port); |
9dcc71e1 SS |
1171 | if (!dst_vxlan) |
1172 | goto tx_error; | |
1173 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
4ad16930 | 1174 | return; |
9dcc71e1 | 1175 | } |
d342894c | 1176 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
1177 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
6681712d | 1178 | vxh->vx_vni = htonl(vni << 8); |
d342894c | 1179 | |
1180 | __skb_push(skb, sizeof(*uh)); | |
1181 | skb_reset_transport_header(skb); | |
1182 | uh = udp_hdr(skb); | |
1183 | ||
73cf3317 | 1184 | uh->dest = dst_port; |
7d836a76 | 1185 | uh->source = src_port; |
d342894c | 1186 | |
1187 | uh->len = htons(skb->len); | |
1188 | uh->check = 0; | |
1189 | ||
1cad8715 | 1190 | vxlan_set_owner(dev, skb); |
1191 | ||
05c0db08 PS |
1192 | if (handle_offloads(skb)) |
1193 | goto drop; | |
d342894c | 1194 | |
0e6fbc5b PS |
1195 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
1196 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
1197 | ||
1198 | err = iptunnel_xmit(dev_net(dev), rt, skb, fl4.saddr, dst, | |
1199 | IPPROTO_UDP, tos, ttl, df); | |
1200 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
1201 | ||
4ad16930 | 1202 | return; |
d342894c | 1203 | |
1204 | drop: | |
1205 | dev->stats.tx_dropped++; | |
1206 | goto tx_free; | |
1207 | ||
1208 | tx_error: | |
1209 | dev->stats.tx_errors++; | |
1210 | tx_free: | |
1211 | dev_kfree_skb(skb); | |
d342894c | 1212 | } |
1213 | ||
6681712d DS |
1214 | /* Transmit local packets over Vxlan |
1215 | * | |
1216 | * Outer IP header inherits ECN and DF from inner header. | |
1217 | * Outer UDP destination is the VXLAN assigned port. | |
1218 | * source port is based on hash of flow | |
1219 | */ | |
1220 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
1221 | { | |
1222 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1223 | struct ethhdr *eth; | |
1224 | bool did_rsc = false; | |
afbd8bae | 1225 | struct vxlan_rdst *rdst; |
6681712d | 1226 | struct vxlan_fdb *f; |
6681712d DS |
1227 | |
1228 | skb_reset_mac_header(skb); | |
1229 | eth = eth_hdr(skb); | |
1230 | ||
1231 | if ((vxlan->flags & VXLAN_F_PROXY) && ntohs(eth->h_proto) == ETH_P_ARP) | |
1232 | return arp_reduce(dev, skb); | |
6681712d DS |
1233 | |
1234 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
ae884082 DS |
1235 | did_rsc = false; |
1236 | ||
1237 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
1238 | ntohs(eth->h_proto) == ETH_P_IP) { | |
1239 | did_rsc = route_shortcircuit(dev, skb); | |
1240 | if (did_rsc) | |
1241 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
1242 | } | |
1243 | ||
6681712d | 1244 | if (f == NULL) { |
afbd8bae MR |
1245 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
1246 | if (f == NULL) { | |
1247 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
1248 | !is_multicast_ether_addr(eth->h_dest)) | |
1249 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
1250 | ||
1251 | dev->stats.tx_dropped++; | |
1252 | dev_kfree_skb(skb); | |
1253 | return NETDEV_TX_OK; | |
1254 | } | |
1255 | } | |
6681712d | 1256 | |
afbd8bae MR |
1257 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
1258 | struct sk_buff *skb1; | |
6681712d | 1259 | |
afbd8bae MR |
1260 | skb1 = skb_clone(skb, GFP_ATOMIC); |
1261 | if (skb1) | |
1262 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
1263 | } |
1264 | ||
afbd8bae | 1265 | dev_kfree_skb(skb); |
4ad16930 | 1266 | return NETDEV_TX_OK; |
6681712d DS |
1267 | } |
1268 | ||
d342894c | 1269 | /* Walk the forwarding table and purge stale entries */ |
1270 | static void vxlan_cleanup(unsigned long arg) | |
1271 | { | |
1272 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
1273 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
1274 | unsigned int h; | |
1275 | ||
1276 | if (!netif_running(vxlan->dev)) | |
1277 | return; | |
1278 | ||
1279 | spin_lock_bh(&vxlan->hash_lock); | |
1280 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1281 | struct hlist_node *p, *n; | |
1282 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1283 | struct vxlan_fdb *f | |
1284 | = container_of(p, struct vxlan_fdb, hlist); | |
1285 | unsigned long timeout; | |
1286 | ||
3c172868 | 1287 | if (f->state & NUD_PERMANENT) |
d342894c | 1288 | continue; |
1289 | ||
1290 | timeout = f->used + vxlan->age_interval * HZ; | |
1291 | if (time_before_eq(timeout, jiffies)) { | |
1292 | netdev_dbg(vxlan->dev, | |
1293 | "garbage collect %pM\n", | |
1294 | f->eth_addr); | |
1295 | f->state = NUD_STALE; | |
1296 | vxlan_fdb_destroy(vxlan, f); | |
1297 | } else if (time_before(timeout, next_timer)) | |
1298 | next_timer = timeout; | |
1299 | } | |
1300 | } | |
1301 | spin_unlock_bh(&vxlan->hash_lock); | |
1302 | ||
1303 | mod_timer(&vxlan->age_timer, next_timer); | |
1304 | } | |
1305 | ||
1306 | /* Setup stats when device is created */ | |
1307 | static int vxlan_init(struct net_device *dev) | |
1308 | { | |
1c51a915 SH |
1309 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1310 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
1311 | struct vxlan_sock *vs; | |
1312 | __u32 vni = vxlan->default_dst.remote_vni; | |
1313 | ||
e8171045 PS |
1314 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
1315 | if (!dev->tstats) | |
d342894c | 1316 | return -ENOMEM; |
1317 | ||
1c51a915 SH |
1318 | spin_lock(&vn->sock_lock); |
1319 | vs = vxlan_find_port(dev_net(dev), vxlan->dst_port); | |
1320 | if (vs) { | |
1321 | /* If we have a socket with same port already, reuse it */ | |
1322 | atomic_inc(&vs->refcnt); | |
1323 | vxlan->vn_sock = vs; | |
1324 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); | |
1325 | } else { | |
1326 | /* otherwise make new socket outside of RTNL */ | |
1327 | dev_hold(dev); | |
1328 | queue_work(vxlan_wq, &vxlan->sock_work); | |
1329 | } | |
1330 | spin_unlock(&vn->sock_lock); | |
1331 | ||
d342894c | 1332 | return 0; |
1333 | } | |
1334 | ||
ba609e9b | 1335 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
1336 | { |
1337 | struct vxlan_fdb *f; | |
1338 | ||
1339 | spin_lock_bh(&vxlan->hash_lock); | |
1340 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
1341 | if (f) | |
1342 | vxlan_fdb_destroy(vxlan, f); | |
1343 | spin_unlock_bh(&vxlan->hash_lock); | |
1344 | } | |
1345 | ||
ebf4063e SH |
1346 | static void vxlan_uninit(struct net_device *dev) |
1347 | { | |
1348 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1349 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
1350 | struct vxlan_sock *vs = vxlan->vn_sock; | |
1351 | ||
ba609e9b | 1352 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 1353 | |
ebf4063e SH |
1354 | if (vs) |
1355 | vxlan_sock_release(vn, vs); | |
1356 | free_percpu(dev->tstats); | |
1357 | } | |
1358 | ||
d342894c | 1359 | /* Start ageing timer and join group when device is brought up */ |
1360 | static int vxlan_open(struct net_device *dev) | |
1361 | { | |
1362 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1c51a915 SH |
1363 | struct vxlan_sock *vs = vxlan->vn_sock; |
1364 | ||
1365 | /* socket hasn't been created */ | |
1366 | if (!vs) | |
1367 | return -ENOTCONN; | |
d342894c | 1368 | |
c7995c43 | 1369 | if (IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip))) { |
1c51a915 | 1370 | vxlan_sock_hold(vs); |
7c47cedf SH |
1371 | dev_hold(dev); |
1372 | queue_work(vxlan_wq, &vxlan->igmp_work); | |
d342894c | 1373 | } |
1374 | ||
1375 | if (vxlan->age_interval) | |
1376 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | /* Purge the forwarding table */ | |
1382 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
1383 | { | |
31fec5aa | 1384 | unsigned int h; |
d342894c | 1385 | |
1386 | spin_lock_bh(&vxlan->hash_lock); | |
1387 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1388 | struct hlist_node *p, *n; | |
1389 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1390 | struct vxlan_fdb *f | |
1391 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
1392 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
1393 | if (!is_zero_ether_addr(f->eth_addr)) | |
1394 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 1395 | } |
1396 | } | |
1397 | spin_unlock_bh(&vxlan->hash_lock); | |
1398 | } | |
1399 | ||
1400 | /* Cleanup timer and forwarding table on shutdown */ | |
1401 | static int vxlan_stop(struct net_device *dev) | |
1402 | { | |
1403 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1c51a915 | 1404 | struct vxlan_sock *vs = vxlan->vn_sock; |
d342894c | 1405 | |
1c51a915 SH |
1406 | if (vs && IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip))) { |
1407 | vxlan_sock_hold(vs); | |
7c47cedf SH |
1408 | dev_hold(dev); |
1409 | queue_work(vxlan_wq, &vxlan->igmp_work); | |
1410 | } | |
d342894c | 1411 | |
1412 | del_timer_sync(&vxlan->age_timer); | |
1413 | ||
1414 | vxlan_flush(vxlan); | |
1415 | ||
1416 | return 0; | |
1417 | } | |
1418 | ||
d342894c | 1419 | /* Stub, nothing needs to be done. */ |
1420 | static void vxlan_set_multicast_list(struct net_device *dev) | |
1421 | { | |
1422 | } | |
1423 | ||
1424 | static const struct net_device_ops vxlan_netdev_ops = { | |
1425 | .ndo_init = vxlan_init, | |
ebf4063e | 1426 | .ndo_uninit = vxlan_uninit, |
d342894c | 1427 | .ndo_open = vxlan_open, |
1428 | .ndo_stop = vxlan_stop, | |
1429 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 1430 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 1431 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
1432 | .ndo_change_mtu = eth_change_mtu, | |
1433 | .ndo_validate_addr = eth_validate_addr, | |
1434 | .ndo_set_mac_address = eth_mac_addr, | |
1435 | .ndo_fdb_add = vxlan_fdb_add, | |
1436 | .ndo_fdb_del = vxlan_fdb_delete, | |
1437 | .ndo_fdb_dump = vxlan_fdb_dump, | |
1438 | }; | |
1439 | ||
1440 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1441 | static struct device_type vxlan_type = { | |
1442 | .name = "vxlan", | |
1443 | }; | |
1444 | ||
d342894c | 1445 | /* Initialize the device structure. */ |
1446 | static void vxlan_setup(struct net_device *dev) | |
1447 | { | |
1448 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 1449 | unsigned int h; |
05f47d69 | 1450 | int low, high; |
d342894c | 1451 | |
1452 | eth_hw_addr_random(dev); | |
1453 | ether_setup(dev); | |
2840bf22 | 1454 | dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM; |
d342894c | 1455 | |
1456 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 1457 | dev->destructor = free_netdev; |
d342894c | 1458 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
1459 | ||
1460 | dev->tx_queue_len = 0; | |
1461 | dev->features |= NETIF_F_LLTX; | |
1462 | dev->features |= NETIF_F_NETNS_LOCAL; | |
d6727fe3 | 1463 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 1464 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 1465 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 JG |
1466 | |
1467 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; | |
05c0db08 | 1468 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
d342894c | 1469 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
6602d007 | 1470 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 1471 | |
553675fb | 1472 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 1473 | spin_lock_init(&vxlan->hash_lock); |
7c47cedf | 1474 | INIT_WORK(&vxlan->igmp_work, vxlan_igmp_work); |
1c51a915 | 1475 | INIT_WORK(&vxlan->sock_work, vxlan_sock_work); |
d342894c | 1476 | |
1477 | init_timer_deferrable(&vxlan->age_timer); | |
1478 | vxlan->age_timer.function = vxlan_cleanup; | |
1479 | vxlan->age_timer.data = (unsigned long) vxlan; | |
1480 | ||
05f47d69 | 1481 | inet_get_local_port_range(&low, &high); |
1482 | vxlan->port_min = low; | |
1483 | vxlan->port_max = high; | |
823aa873 | 1484 | vxlan->dst_port = htons(vxlan_port); |
05f47d69 | 1485 | |
d342894c | 1486 | vxlan->dev = dev; |
1487 | ||
1488 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
1489 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
1490 | } | |
1491 | ||
1492 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
1493 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 1494 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
d342894c | 1495 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
1496 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
1497 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, | |
1498 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
1499 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
1500 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
1501 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 1502 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
1503 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
1504 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
1505 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
1506 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
823aa873 | 1507 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
d342894c | 1508 | }; |
1509 | ||
1510 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1511 | { | |
1512 | if (tb[IFLA_ADDRESS]) { | |
1513 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
1514 | pr_debug("invalid link address (not ethernet)\n"); | |
1515 | return -EINVAL; | |
1516 | } | |
1517 | ||
1518 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
1519 | pr_debug("invalid all zero ethernet address\n"); | |
1520 | return -EADDRNOTAVAIL; | |
1521 | } | |
1522 | } | |
1523 | ||
1524 | if (!data) | |
1525 | return -EINVAL; | |
1526 | ||
1527 | if (data[IFLA_VXLAN_ID]) { | |
1528 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
1529 | if (id >= VXLAN_VID_MASK) | |
1530 | return -ERANGE; | |
1531 | } | |
1532 | ||
05f47d69 | 1533 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
1534 | const struct ifla_vxlan_port_range *p | |
1535 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
1536 | ||
1537 | if (ntohs(p->high) < ntohs(p->low)) { | |
1538 | pr_debug("port range %u .. %u not valid\n", | |
1539 | ntohs(p->low), ntohs(p->high)); | |
1540 | return -EINVAL; | |
1541 | } | |
1542 | } | |
1543 | ||
d342894c | 1544 | return 0; |
1545 | } | |
1546 | ||
1b13c97f YB |
1547 | static void vxlan_get_drvinfo(struct net_device *netdev, |
1548 | struct ethtool_drvinfo *drvinfo) | |
1549 | { | |
1550 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
1551 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
1552 | } | |
1553 | ||
1554 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
1555 | .get_drvinfo = vxlan_get_drvinfo, | |
1556 | .get_link = ethtool_op_get_link, | |
1557 | }; | |
1558 | ||
553675fb | 1559 | static void vxlan_del_work(struct work_struct *work) |
1560 | { | |
1561 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
1562 | ||
1563 | sk_release_kernel(vs->sock->sk); | |
1564 | kfree_rcu(vs, rcu); | |
1565 | } | |
1566 | ||
553675fb | 1567 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port) |
1568 | { | |
1569 | struct vxlan_sock *vs; | |
1570 | struct sock *sk; | |
1571 | struct sockaddr_in vxlan_addr = { | |
1572 | .sin_family = AF_INET, | |
1573 | .sin_addr.s_addr = htonl(INADDR_ANY), | |
bb3fd687 | 1574 | .sin_port = port, |
553675fb | 1575 | }; |
1576 | int rc; | |
31fec5aa | 1577 | unsigned int h; |
553675fb | 1578 | |
1579 | vs = kmalloc(sizeof(*vs), GFP_KERNEL); | |
1580 | if (!vs) | |
1581 | return ERR_PTR(-ENOMEM); | |
1582 | ||
1583 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
1584 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
1585 | ||
1586 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
1587 | ||
1588 | /* Create UDP socket for encapsulation receive. */ | |
1589 | rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &vs->sock); | |
1590 | if (rc < 0) { | |
1591 | pr_debug("UDP socket create failed\n"); | |
1592 | kfree(vs); | |
1593 | return ERR_PTR(rc); | |
1594 | } | |
1595 | ||
1596 | /* Put in proper namespace */ | |
1597 | sk = vs->sock->sk; | |
1598 | sk_change_net(sk, net); | |
1599 | ||
553675fb | 1600 | rc = kernel_bind(vs->sock, (struct sockaddr *) &vxlan_addr, |
1601 | sizeof(vxlan_addr)); | |
1602 | if (rc < 0) { | |
1603 | pr_debug("bind for UDP socket %pI4:%u (%d)\n", | |
1604 | &vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc); | |
1605 | sk_release_kernel(sk); | |
1606 | kfree(vs); | |
1607 | return ERR_PTR(rc); | |
1608 | } | |
1609 | ||
1610 | /* Disable multicast loopback */ | |
1611 | inet_sk(sk)->mc_loop = 0; | |
1612 | ||
1613 | /* Mark socket as an encapsulation socket. */ | |
1614 | udp_sk(sk)->encap_type = 1; | |
1615 | udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; | |
1616 | udp_encap_enable(); | |
7c47cedf | 1617 | atomic_set(&vs->refcnt, 1); |
553675fb | 1618 | |
553675fb | 1619 | return vs; |
1620 | } | |
1621 | ||
1c51a915 SH |
1622 | /* Scheduled at device creation to bind to a socket */ |
1623 | static void vxlan_sock_work(struct work_struct *work) | |
1624 | { | |
1625 | struct vxlan_dev *vxlan | |
1626 | = container_of(work, struct vxlan_dev, sock_work); | |
1627 | struct net_device *dev = vxlan->dev; | |
1628 | struct net *net = dev_net(dev); | |
1629 | __u32 vni = vxlan->default_dst.remote_vni; | |
1630 | __be16 port = vxlan->dst_port; | |
1631 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
1632 | struct vxlan_sock *nvs, *ovs; | |
1633 | ||
1634 | nvs = vxlan_socket_create(net, port); | |
1635 | if (IS_ERR(nvs)) { | |
1636 | netdev_err(vxlan->dev, "Can not create UDP socket, %ld\n", | |
1637 | PTR_ERR(nvs)); | |
1638 | goto out; | |
1639 | } | |
1640 | ||
1641 | spin_lock(&vn->sock_lock); | |
1642 | /* Look again to see if can reuse socket */ | |
1643 | ovs = vxlan_find_port(net, port); | |
1644 | if (ovs) { | |
1645 | atomic_inc(&ovs->refcnt); | |
1646 | vxlan->vn_sock = ovs; | |
1647 | hlist_add_head_rcu(&vxlan->hlist, vni_head(ovs, vni)); | |
1648 | spin_unlock(&vn->sock_lock); | |
1649 | ||
1650 | sk_release_kernel(nvs->sock->sk); | |
1651 | kfree(nvs); | |
1652 | } else { | |
1653 | vxlan->vn_sock = nvs; | |
1654 | hlist_add_head_rcu(&nvs->hlist, vs_head(net, port)); | |
1655 | hlist_add_head_rcu(&vxlan->hlist, vni_head(nvs, vni)); | |
1656 | spin_unlock(&vn->sock_lock); | |
1657 | } | |
1658 | out: | |
1659 | dev_put(dev); | |
1660 | } | |
1661 | ||
d342894c | 1662 | static int vxlan_newlink(struct net *net, struct net_device *dev, |
1663 | struct nlattr *tb[], struct nlattr *data[]) | |
1664 | { | |
553675fb | 1665 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
d342894c | 1666 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 1667 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 1668 | __u32 vni; |
1669 | int err; | |
1670 | ||
1671 | if (!data[IFLA_VXLAN_ID]) | |
1672 | return -EINVAL; | |
1673 | ||
1674 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); | |
c7995c43 | 1675 | dst->remote_vni = vni; |
d342894c | 1676 | |
5d174dd8 | 1677 | if (data[IFLA_VXLAN_GROUP]) |
1678 | dst->remote_ip = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
d342894c | 1679 | |
1680 | if (data[IFLA_VXLAN_LOCAL]) | |
1681 | vxlan->saddr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
1682 | ||
34e02aa1 | 1683 | if (data[IFLA_VXLAN_LINK] && |
c7995c43 | 1684 | (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { |
34e02aa1 | 1685 | struct net_device *lowerdev |
c7995c43 | 1686 | = __dev_get_by_index(net, dst->remote_ifindex); |
34e02aa1 | 1687 | |
1688 | if (!lowerdev) { | |
c7995c43 | 1689 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 1690 | return -ENODEV; |
1691 | } | |
d342894c | 1692 | |
34e02aa1 | 1693 | if (!tb[IFLA_MTU]) |
d342894c | 1694 | dev->mtu = lowerdev->mtu - VXLAN_HEADROOM; |
1ba56fb4 AD |
1695 | |
1696 | /* update header length based on lower device */ | |
1697 | dev->hard_header_len = lowerdev->hard_header_len + | |
1698 | VXLAN_HEADROOM; | |
d342894c | 1699 | } |
1700 | ||
1701 | if (data[IFLA_VXLAN_TOS]) | |
1702 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
1703 | ||
afb97186 VB |
1704 | if (data[IFLA_VXLAN_TTL]) |
1705 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
1706 | ||
d342894c | 1707 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 1708 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 1709 | |
1710 | if (data[IFLA_VXLAN_AGEING]) | |
1711 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
1712 | else | |
1713 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
1714 | ||
e4f67add DS |
1715 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
1716 | vxlan->flags |= VXLAN_F_PROXY; | |
1717 | ||
1718 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
1719 | vxlan->flags |= VXLAN_F_RSC; | |
1720 | ||
1721 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
1722 | vxlan->flags |= VXLAN_F_L2MISS; | |
1723 | ||
1724 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
1725 | vxlan->flags |= VXLAN_F_L3MISS; | |
1726 | ||
d342894c | 1727 | if (data[IFLA_VXLAN_LIMIT]) |
1728 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
1729 | ||
05f47d69 | 1730 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
1731 | const struct ifla_vxlan_port_range *p | |
1732 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
1733 | vxlan->port_min = ntohs(p->low); | |
1734 | vxlan->port_max = ntohs(p->high); | |
1735 | } | |
1736 | ||
823aa873 | 1737 | if (data[IFLA_VXLAN_PORT]) |
1738 | vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
1739 | ||
553675fb | 1740 | if (vxlan_find_vni(net, vni, vxlan->dst_port)) { |
1741 | pr_info("duplicate VNI %u\n", vni); | |
1742 | return -EEXIST; | |
1743 | } | |
1744 | ||
1b13c97f YB |
1745 | SET_ETHTOOL_OPS(dev, &vxlan_ethtool_ops); |
1746 | ||
afbd8bae MR |
1747 | /* create an fdb entry for default destination */ |
1748 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
1749 | vxlan->default_dst.remote_ip, | |
1750 | NUD_REACHABLE|NUD_PERMANENT, | |
1751 | NLM_F_EXCL|NLM_F_CREATE, | |
1752 | vxlan->dst_port, vxlan->default_dst.remote_vni, | |
1753 | vxlan->default_dst.remote_ifindex, NTF_SELF); | |
1c51a915 | 1754 | if (err) |
553675fb | 1755 | return err; |
d342894c | 1756 | |
afbd8bae MR |
1757 | err = register_netdevice(dev); |
1758 | if (err) { | |
ba609e9b | 1759 | vxlan_fdb_delete_default(vxlan); |
afbd8bae MR |
1760 | return err; |
1761 | } | |
1762 | ||
553675fb | 1763 | list_add(&vxlan->next, &vn->vxlan_list); |
553675fb | 1764 | |
1765 | return 0; | |
d342894c | 1766 | } |
1767 | ||
1768 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
1769 | { | |
fe5c3561 | 1770 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 1771 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1772 | ||
fe5c3561 | 1773 | flush_workqueue(vxlan_wq); |
1774 | ||
1775 | spin_lock(&vn->sock_lock); | |
d342894c | 1776 | hlist_del_rcu(&vxlan->hlist); |
fe5c3561 | 1777 | spin_unlock(&vn->sock_lock); |
1778 | ||
553675fb | 1779 | list_del(&vxlan->next); |
d342894c | 1780 | unregister_netdevice_queue(dev, head); |
1781 | } | |
1782 | ||
1783 | static size_t vxlan_get_size(const struct net_device *dev) | |
1784 | { | |
1785 | ||
1786 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
5d174dd8 | 1787 | nla_total_size(sizeof(__be32)) +/* IFLA_VXLAN_GROUP */ |
d342894c | 1788 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
1789 | nla_total_size(sizeof(__be32))+ /* IFLA_VXLAN_LOCAL */ | |
1790 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ | |
1791 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
1792 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
1793 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
1794 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
1795 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
1796 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 1797 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
1798 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 1799 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
823aa873 | 1800 | nla_total_size(sizeof(__be16))+ /* IFLA_VXLAN_PORT */ |
d342894c | 1801 | 0; |
1802 | } | |
1803 | ||
1804 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1805 | { | |
1806 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 1807 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 1808 | struct ifla_vxlan_port_range ports = { |
1809 | .low = htons(vxlan->port_min), | |
1810 | .high = htons(vxlan->port_max), | |
1811 | }; | |
d342894c | 1812 | |
c7995c43 | 1813 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 1814 | goto nla_put_failure; |
1815 | ||
5d174dd8 | 1816 | if (dst->remote_ip && nla_put_be32(skb, IFLA_VXLAN_GROUP, dst->remote_ip)) |
d342894c | 1817 | goto nla_put_failure; |
1818 | ||
c7995c43 | 1819 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 1820 | goto nla_put_failure; |
1821 | ||
7c41c42c | 1822 | if (vxlan->saddr && nla_put_be32(skb, IFLA_VXLAN_LOCAL, vxlan->saddr)) |
d342894c | 1823 | goto nla_put_failure; |
1824 | ||
1825 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
1826 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
1827 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
1828 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
1829 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
1830 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
1831 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
1832 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
1833 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
1834 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
1835 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 1836 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
823aa873 | 1837 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || |
1838 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port)) | |
d342894c | 1839 | goto nla_put_failure; |
1840 | ||
05f47d69 | 1841 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
1842 | goto nla_put_failure; | |
1843 | ||
d342894c | 1844 | return 0; |
1845 | ||
1846 | nla_put_failure: | |
1847 | return -EMSGSIZE; | |
1848 | } | |
1849 | ||
1850 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { | |
1851 | .kind = "vxlan", | |
1852 | .maxtype = IFLA_VXLAN_MAX, | |
1853 | .policy = vxlan_policy, | |
1854 | .priv_size = sizeof(struct vxlan_dev), | |
1855 | .setup = vxlan_setup, | |
1856 | .validate = vxlan_validate, | |
1857 | .newlink = vxlan_newlink, | |
1858 | .dellink = vxlan_dellink, | |
1859 | .get_size = vxlan_get_size, | |
1860 | .fill_info = vxlan_fill_info, | |
1861 | }; | |
1862 | ||
1863 | static __net_init int vxlan_init_net(struct net *net) | |
1864 | { | |
1865 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 1866 | unsigned int h; |
d342894c | 1867 | |
553675fb | 1868 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 1869 | spin_lock_init(&vn->sock_lock); |
d342894c | 1870 | |
553675fb | 1871 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
1872 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 1873 | |
1874 | return 0; | |
1875 | } | |
1876 | ||
1877 | static __net_exit void vxlan_exit_net(struct net *net) | |
1878 | { | |
1879 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
9cb6cb7e | 1880 | struct vxlan_dev *vxlan; |
9cb6cb7e ZM |
1881 | |
1882 | rtnl_lock(); | |
553675fb | 1883 | list_for_each_entry(vxlan, &vn->vxlan_list, next) |
1884 | dev_close(vxlan->dev); | |
9cb6cb7e | 1885 | rtnl_unlock(); |
d342894c | 1886 | } |
1887 | ||
1888 | static struct pernet_operations vxlan_net_ops = { | |
1889 | .init = vxlan_init_net, | |
1890 | .exit = vxlan_exit_net, | |
1891 | .id = &vxlan_net_id, | |
1892 | .size = sizeof(struct vxlan_net), | |
1893 | }; | |
1894 | ||
1895 | static int __init vxlan_init_module(void) | |
1896 | { | |
1897 | int rc; | |
1898 | ||
758c57d1 SH |
1899 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
1900 | if (!vxlan_wq) | |
1901 | return -ENOMEM; | |
1902 | ||
d342894c | 1903 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
1904 | ||
1905 | rc = register_pernet_device(&vxlan_net_ops); | |
1906 | if (rc) | |
1907 | goto out1; | |
1908 | ||
1909 | rc = rtnl_link_register(&vxlan_link_ops); | |
1910 | if (rc) | |
1911 | goto out2; | |
1912 | ||
1913 | return 0; | |
1914 | ||
1915 | out2: | |
1916 | unregister_pernet_device(&vxlan_net_ops); | |
1917 | out1: | |
758c57d1 | 1918 | destroy_workqueue(vxlan_wq); |
d342894c | 1919 | return rc; |
1920 | } | |
7332a13b | 1921 | late_initcall(vxlan_init_module); |
d342894c | 1922 | |
1923 | static void __exit vxlan_cleanup_module(void) | |
1924 | { | |
b7153984 | 1925 | rtnl_link_unregister(&vxlan_link_ops); |
758c57d1 | 1926 | destroy_workqueue(vxlan_wq); |
f89e57c4 | 1927 | unregister_pernet_device(&vxlan_net_ops); |
6681712d | 1928 | rcu_barrier(); |
d342894c | 1929 | } |
1930 | module_exit(vxlan_cleanup_module); | |
1931 | ||
1932 | MODULE_LICENSE("GPL"); | |
1933 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 1934 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
d342894c | 1935 | MODULE_ALIAS_RTNL_LINK("vxlan"); |