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Commit | Line | Data |
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d342894c | 1 | /* |
eb5ce439 | 2 | * VXLAN: Virtual eXtensible Local Area Network |
d342894c | 3 | * |
4 | * Copyright (c) 2012 Vyatta Inc. | |
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 | |
11 | * - use IANA UDP port number (when defined) | |
12 | * - IPv6 (not in RFC) | |
13 | */ | |
14 | ||
15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/types.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/skbuff.h> | |
23 | #include <linux/rculist.h> | |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
27 | #include <linux/udp.h> | |
28 | #include <linux/igmp.h> | |
29 | #include <linux/etherdevice.h> | |
30 | #include <linux/if_ether.h> | |
d342894c | 31 | #include <linux/hash.h> |
1b13c97f | 32 | #include <linux/ethtool.h> |
e4f67add DS |
33 | #include <net/arp.h> |
34 | #include <net/ndisc.h> | |
d342894c | 35 | #include <net/ip.h> |
8dc98eb2 | 36 | #include <net/ipip.h> |
d342894c | 37 | #include <net/icmp.h> |
38 | #include <net/udp.h> | |
39 | #include <net/rtnetlink.h> | |
40 | #include <net/route.h> | |
41 | #include <net/dsfield.h> | |
42 | #include <net/inet_ecn.h> | |
43 | #include <net/net_namespace.h> | |
44 | #include <net/netns/generic.h> | |
45 | ||
46 | #define VXLAN_VERSION "0.1" | |
47 | ||
48 | #define VNI_HASH_BITS 10 | |
49 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
50 | #define FDB_HASH_BITS 8 | |
51 | #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) | |
52 | #define FDB_AGE_DEFAULT 300 /* 5 min */ | |
53 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
54 | ||
55 | #define VXLAN_N_VID (1u << 24) | |
56 | #define VXLAN_VID_MASK (VXLAN_N_VID - 1) | |
52b702ff AD |
57 | /* IP header + UDP + VXLAN + Ethernet header */ |
58 | #define VXLAN_HEADROOM (20 + 8 + 8 + 14) | |
d342894c | 59 | |
60 | #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */ | |
61 | ||
62 | /* VXLAN protocol header */ | |
63 | struct vxlanhdr { | |
64 | __be32 vx_flags; | |
65 | __be32 vx_vni; | |
66 | }; | |
67 | ||
68 | /* UDP port for VXLAN traffic. */ | |
69 | static unsigned int vxlan_port __read_mostly = 8472; | |
70 | module_param_named(udp_port, vxlan_port, uint, 0444); | |
71 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); | |
72 | ||
73 | static bool log_ecn_error = true; | |
74 | module_param(log_ecn_error, bool, 0644); | |
75 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
76 | ||
77 | /* per-net private data for this module */ | |
78 | static unsigned int vxlan_net_id; | |
79 | struct vxlan_net { | |
80 | struct socket *sock; /* UDP encap socket */ | |
81 | struct hlist_head vni_list[VNI_HASH_SIZE]; | |
82 | }; | |
83 | ||
84 | /* Forwarding table entry */ | |
85 | struct vxlan_fdb { | |
86 | struct hlist_node hlist; /* linked list of entries */ | |
87 | struct rcu_head rcu; | |
88 | unsigned long updated; /* jiffies */ | |
89 | unsigned long used; | |
90 | __be32 remote_ip; | |
91 | u16 state; /* see ndm_state */ | |
92 | u8 eth_addr[ETH_ALEN]; | |
93 | }; | |
94 | ||
95 | /* Per-cpu network traffic stats */ | |
96 | struct vxlan_stats { | |
97 | u64 rx_packets; | |
98 | u64 rx_bytes; | |
99 | u64 tx_packets; | |
100 | u64 tx_bytes; | |
101 | struct u64_stats_sync syncp; | |
102 | }; | |
103 | ||
104 | /* Pseudo network device */ | |
105 | struct vxlan_dev { | |
106 | struct hlist_node hlist; | |
107 | struct net_device *dev; | |
108 | struct vxlan_stats __percpu *stats; | |
109 | __u32 vni; /* virtual network id */ | |
110 | __be32 gaddr; /* multicast group */ | |
111 | __be32 saddr; /* source address */ | |
112 | unsigned int link; /* link to multicast over */ | |
05f47d69 | 113 | __u16 port_min; /* source port range */ |
114 | __u16 port_max; | |
d342894c | 115 | __u8 tos; /* TOS override */ |
116 | __u8 ttl; | |
e4f67add | 117 | u32 flags; /* VXLAN_F_* below */ |
d342894c | 118 | |
119 | unsigned long age_interval; | |
120 | struct timer_list age_timer; | |
121 | spinlock_t hash_lock; | |
122 | unsigned int addrcnt; | |
123 | unsigned int addrmax; | |
d342894c | 124 | |
125 | struct hlist_head fdb_head[FDB_HASH_SIZE]; | |
126 | }; | |
127 | ||
e4f67add DS |
128 | #define VXLAN_F_LEARN 0x01 |
129 | #define VXLAN_F_PROXY 0x02 | |
130 | #define VXLAN_F_RSC 0x04 | |
131 | #define VXLAN_F_L2MISS 0x08 | |
132 | #define VXLAN_F_L3MISS 0x10 | |
133 | ||
d342894c | 134 | /* salt for hash table */ |
135 | static u32 vxlan_salt __read_mostly; | |
136 | ||
137 | static inline struct hlist_head *vni_head(struct net *net, u32 id) | |
138 | { | |
139 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
140 | ||
141 | return &vn->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
142 | } | |
143 | ||
144 | /* Look up VNI in a per net namespace table */ | |
145 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id) | |
146 | { | |
147 | struct vxlan_dev *vxlan; | |
148 | struct hlist_node *node; | |
149 | ||
150 | hlist_for_each_entry_rcu(vxlan, node, vni_head(net, id), hlist) { | |
151 | if (vxlan->vni == id) | |
152 | return vxlan; | |
153 | } | |
154 | ||
155 | return NULL; | |
156 | } | |
157 | ||
158 | /* Fill in neighbour message in skbuff. */ | |
159 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
160 | const struct vxlan_fdb *fdb, | |
161 | u32 portid, u32 seq, int type, unsigned int flags) | |
162 | { | |
163 | unsigned long now = jiffies; | |
164 | struct nda_cacheinfo ci; | |
165 | struct nlmsghdr *nlh; | |
166 | struct ndmsg *ndm; | |
e4f67add | 167 | bool send_ip, send_eth; |
d342894c | 168 | |
169 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
170 | if (nlh == NULL) | |
171 | return -EMSGSIZE; | |
172 | ||
173 | ndm = nlmsg_data(nlh); | |
174 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
175 | |
176 | send_eth = send_ip = true; | |
177 | ||
178 | if (type == RTM_GETNEIGH) { | |
179 | ndm->ndm_family = AF_INET; | |
180 | send_ip = fdb->remote_ip != 0; | |
181 | send_eth = !is_zero_ether_addr(fdb->eth_addr); | |
182 | } else | |
183 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 184 | ndm->ndm_state = fdb->state; |
185 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
186 | ndm->ndm_flags = NTF_SELF; | |
187 | ndm->ndm_type = NDA_DST; | |
188 | ||
e4f67add | 189 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 190 | goto nla_put_failure; |
191 | ||
e4f67add | 192 | if (send_ip && nla_put_be32(skb, NDA_DST, fdb->remote_ip)) |
d342894c | 193 | goto nla_put_failure; |
194 | ||
195 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
196 | ci.ndm_confirmed = 0; | |
197 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
198 | ci.ndm_refcnt = 0; | |
199 | ||
200 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
201 | goto nla_put_failure; | |
202 | ||
203 | return nlmsg_end(skb, nlh); | |
204 | ||
205 | nla_put_failure: | |
206 | nlmsg_cancel(skb, nlh); | |
207 | return -EMSGSIZE; | |
208 | } | |
209 | ||
210 | static inline size_t vxlan_nlmsg_size(void) | |
211 | { | |
212 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
213 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
214 | + nla_total_size(sizeof(__be32)) /* NDA_DST */ | |
215 | + nla_total_size(sizeof(struct nda_cacheinfo)); | |
216 | } | |
217 | ||
218 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, | |
219 | const struct vxlan_fdb *fdb, int type) | |
220 | { | |
221 | struct net *net = dev_net(vxlan->dev); | |
222 | struct sk_buff *skb; | |
223 | int err = -ENOBUFS; | |
224 | ||
225 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
226 | if (skb == NULL) | |
227 | goto errout; | |
228 | ||
229 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0); | |
230 | if (err < 0) { | |
231 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
232 | WARN_ON(err == -EMSGSIZE); | |
233 | kfree_skb(skb); | |
234 | goto errout; | |
235 | } | |
236 | ||
237 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
238 | return; | |
239 | errout: | |
240 | if (err < 0) | |
241 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
242 | } | |
243 | ||
e4f67add DS |
244 | static void vxlan_ip_miss(struct net_device *dev, __be32 ipa) |
245 | { | |
246 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
247 | struct vxlan_fdb f; | |
248 | ||
249 | memset(&f, 0, sizeof f); | |
250 | f.state = NUD_STALE; | |
251 | f.remote_ip = ipa; /* goes to NDA_DST */ | |
252 | ||
253 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
254 | } | |
255 | ||
256 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
257 | { | |
258 | struct vxlan_fdb f; | |
259 | ||
260 | memset(&f, 0, sizeof f); | |
261 | f.state = NUD_STALE; | |
262 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); | |
263 | ||
264 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
265 | } | |
266 | ||
d342894c | 267 | /* Hash Ethernet address */ |
268 | static u32 eth_hash(const unsigned char *addr) | |
269 | { | |
270 | u64 value = get_unaligned((u64 *)addr); | |
271 | ||
272 | /* only want 6 bytes */ | |
273 | #ifdef __BIG_ENDIAN | |
d342894c | 274 | value >>= 16; |
321fb991 | 275 | #else |
276 | value <<= 16; | |
d342894c | 277 | #endif |
278 | return hash_64(value, FDB_HASH_BITS); | |
279 | } | |
280 | ||
281 | /* Hash chain to use given mac address */ | |
282 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
283 | const u8 *mac) | |
284 | { | |
285 | return &vxlan->fdb_head[eth_hash(mac)]; | |
286 | } | |
287 | ||
288 | /* Look up Ethernet address in forwarding table */ | |
289 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, | |
290 | const u8 *mac) | |
291 | ||
292 | { | |
293 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
294 | struct vxlan_fdb *f; | |
295 | struct hlist_node *node; | |
296 | ||
297 | hlist_for_each_entry_rcu(f, node, head, hlist) { | |
298 | if (compare_ether_addr(mac, f->eth_addr) == 0) | |
299 | return f; | |
300 | } | |
301 | ||
302 | return NULL; | |
303 | } | |
304 | ||
305 | /* Add new entry to forwarding table -- assumes lock held */ | |
306 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
307 | const u8 *mac, __be32 ip, | |
308 | __u16 state, __u16 flags) | |
309 | { | |
310 | struct vxlan_fdb *f; | |
311 | int notify = 0; | |
312 | ||
313 | f = vxlan_find_mac(vxlan, mac); | |
314 | if (f) { | |
315 | if (flags & NLM_F_EXCL) { | |
316 | netdev_dbg(vxlan->dev, | |
317 | "lost race to create %pM\n", mac); | |
318 | return -EEXIST; | |
319 | } | |
320 | if (f->state != state) { | |
321 | f->state = state; | |
322 | f->updated = jiffies; | |
323 | notify = 1; | |
324 | } | |
325 | } else { | |
326 | if (!(flags & NLM_F_CREATE)) | |
327 | return -ENOENT; | |
328 | ||
329 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
330 | return -ENOSPC; | |
331 | ||
332 | netdev_dbg(vxlan->dev, "add %pM -> %pI4\n", mac, &ip); | |
333 | f = kmalloc(sizeof(*f), GFP_ATOMIC); | |
334 | if (!f) | |
335 | return -ENOMEM; | |
336 | ||
337 | notify = 1; | |
338 | f->remote_ip = ip; | |
339 | f->state = state; | |
340 | f->updated = f->used = jiffies; | |
341 | memcpy(f->eth_addr, mac, ETH_ALEN); | |
342 | ||
343 | ++vxlan->addrcnt; | |
344 | hlist_add_head_rcu(&f->hlist, | |
345 | vxlan_fdb_head(vxlan, mac)); | |
346 | } | |
347 | ||
348 | if (notify) | |
349 | vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH); | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) | |
355 | { | |
356 | netdev_dbg(vxlan->dev, | |
357 | "delete %pM\n", f->eth_addr); | |
358 | ||
359 | --vxlan->addrcnt; | |
360 | vxlan_fdb_notify(vxlan, f, RTM_DELNEIGH); | |
361 | ||
362 | hlist_del_rcu(&f->hlist); | |
363 | kfree_rcu(f, rcu); | |
364 | } | |
365 | ||
366 | /* Add static entry (via netlink) */ | |
367 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
368 | struct net_device *dev, | |
369 | const unsigned char *addr, u16 flags) | |
370 | { | |
371 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
372 | __be32 ip; | |
373 | int err; | |
374 | ||
375 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
376 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
377 | ndm->ndm_state); | |
378 | return -EINVAL; | |
379 | } | |
380 | ||
381 | if (tb[NDA_DST] == NULL) | |
382 | return -EINVAL; | |
383 | ||
384 | if (nla_len(tb[NDA_DST]) != sizeof(__be32)) | |
385 | return -EAFNOSUPPORT; | |
386 | ||
387 | ip = nla_get_be32(tb[NDA_DST]); | |
388 | ||
389 | spin_lock_bh(&vxlan->hash_lock); | |
390 | err = vxlan_fdb_create(vxlan, addr, ip, ndm->ndm_state, flags); | |
391 | spin_unlock_bh(&vxlan->hash_lock); | |
392 | ||
393 | return err; | |
394 | } | |
395 | ||
396 | /* Delete entry (via netlink) */ | |
1690be63 VY |
397 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
398 | struct net_device *dev, | |
d342894c | 399 | const unsigned char *addr) |
400 | { | |
401 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
402 | struct vxlan_fdb *f; | |
403 | int err = -ENOENT; | |
404 | ||
405 | spin_lock_bh(&vxlan->hash_lock); | |
406 | f = vxlan_find_mac(vxlan, addr); | |
407 | if (f) { | |
408 | vxlan_fdb_destroy(vxlan, f); | |
409 | err = 0; | |
410 | } | |
411 | spin_unlock_bh(&vxlan->hash_lock); | |
412 | ||
413 | return err; | |
414 | } | |
415 | ||
416 | /* Dump forwarding table */ | |
417 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
418 | struct net_device *dev, int idx) | |
419 | { | |
420 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
421 | unsigned int h; | |
422 | ||
423 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
424 | struct vxlan_fdb *f; | |
425 | struct hlist_node *n; | |
426 | int err; | |
427 | ||
428 | hlist_for_each_entry_rcu(f, n, &vxlan->fdb_head[h], hlist) { | |
429 | if (idx < cb->args[0]) | |
430 | goto skip; | |
431 | ||
432 | err = vxlan_fdb_info(skb, vxlan, f, | |
433 | NETLINK_CB(cb->skb).portid, | |
434 | cb->nlh->nlmsg_seq, | |
435 | RTM_NEWNEIGH, | |
436 | NLM_F_MULTI); | |
437 | if (err < 0) | |
438 | break; | |
439 | skip: | |
440 | ++idx; | |
441 | } | |
442 | } | |
443 | ||
444 | return idx; | |
445 | } | |
446 | ||
447 | /* Watch incoming packets to learn mapping between Ethernet address | |
448 | * and Tunnel endpoint. | |
449 | */ | |
450 | static void vxlan_snoop(struct net_device *dev, | |
451 | __be32 src_ip, const u8 *src_mac) | |
452 | { | |
453 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
454 | struct vxlan_fdb *f; | |
455 | int err; | |
456 | ||
457 | f = vxlan_find_mac(vxlan, src_mac); | |
458 | if (likely(f)) { | |
459 | f->used = jiffies; | |
460 | if (likely(f->remote_ip == src_ip)) | |
461 | return; | |
462 | ||
463 | if (net_ratelimit()) | |
464 | netdev_info(dev, | |
465 | "%pM migrated from %pI4 to %pI4\n", | |
466 | src_mac, &f->remote_ip, &src_ip); | |
467 | ||
468 | f->remote_ip = src_ip; | |
469 | f->updated = jiffies; | |
470 | } else { | |
471 | /* learned new entry */ | |
472 | spin_lock(&vxlan->hash_lock); | |
473 | err = vxlan_fdb_create(vxlan, src_mac, src_ip, | |
474 | NUD_REACHABLE, | |
475 | NLM_F_EXCL|NLM_F_CREATE); | |
476 | spin_unlock(&vxlan->hash_lock); | |
477 | } | |
478 | } | |
479 | ||
480 | ||
481 | /* See if multicast group is already in use by other ID */ | |
482 | static bool vxlan_group_used(struct vxlan_net *vn, | |
483 | const struct vxlan_dev *this) | |
484 | { | |
485 | const struct vxlan_dev *vxlan; | |
486 | struct hlist_node *node; | |
487 | unsigned h; | |
488 | ||
489 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
490 | hlist_for_each_entry(vxlan, node, &vn->vni_list[h], hlist) { | |
491 | if (vxlan == this) | |
492 | continue; | |
493 | ||
494 | if (!netif_running(vxlan->dev)) | |
495 | continue; | |
496 | ||
497 | if (vxlan->gaddr == this->gaddr) | |
498 | return true; | |
499 | } | |
500 | ||
501 | return false; | |
502 | } | |
503 | ||
504 | /* kernel equivalent to IP_ADD_MEMBERSHIP */ | |
505 | static int vxlan_join_group(struct net_device *dev) | |
506 | { | |
507 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
508 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
509 | struct sock *sk = vn->sock->sk; | |
510 | struct ip_mreqn mreq = { | |
af9b078e YB |
511 | .imr_multiaddr.s_addr = vxlan->gaddr, |
512 | .imr_ifindex = vxlan->link, | |
d342894c | 513 | }; |
514 | int err; | |
515 | ||
516 | /* Already a member of group */ | |
517 | if (vxlan_group_used(vn, vxlan)) | |
518 | return 0; | |
519 | ||
520 | /* Need to drop RTNL to call multicast join */ | |
521 | rtnl_unlock(); | |
522 | lock_sock(sk); | |
523 | err = ip_mc_join_group(sk, &mreq); | |
524 | release_sock(sk); | |
525 | rtnl_lock(); | |
526 | ||
527 | return err; | |
528 | } | |
529 | ||
530 | ||
531 | /* kernel equivalent to IP_DROP_MEMBERSHIP */ | |
532 | static int vxlan_leave_group(struct net_device *dev) | |
533 | { | |
534 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
535 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
536 | int err = 0; | |
537 | struct sock *sk = vn->sock->sk; | |
538 | struct ip_mreqn mreq = { | |
af9b078e YB |
539 | .imr_multiaddr.s_addr = vxlan->gaddr, |
540 | .imr_ifindex = vxlan->link, | |
d342894c | 541 | }; |
542 | ||
543 | /* Only leave group when last vxlan is done. */ | |
544 | if (vxlan_group_used(vn, vxlan)) | |
545 | return 0; | |
546 | ||
547 | /* Need to drop RTNL to call multicast leave */ | |
548 | rtnl_unlock(); | |
549 | lock_sock(sk); | |
550 | err = ip_mc_leave_group(sk, &mreq); | |
551 | release_sock(sk); | |
552 | rtnl_lock(); | |
553 | ||
554 | return err; | |
555 | } | |
556 | ||
557 | /* Callback from net/ipv4/udp.c to receive packets */ | |
558 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
559 | { | |
560 | struct iphdr *oip; | |
561 | struct vxlanhdr *vxh; | |
562 | struct vxlan_dev *vxlan; | |
563 | struct vxlan_stats *stats; | |
564 | __u32 vni; | |
565 | int err; | |
566 | ||
567 | /* pop off outer UDP header */ | |
568 | __skb_pull(skb, sizeof(struct udphdr)); | |
569 | ||
570 | /* Need Vxlan and inner Ethernet header to be present */ | |
571 | if (!pskb_may_pull(skb, sizeof(struct vxlanhdr))) | |
572 | goto error; | |
573 | ||
574 | /* Drop packets with reserved bits set */ | |
575 | vxh = (struct vxlanhdr *) skb->data; | |
576 | if (vxh->vx_flags != htonl(VXLAN_FLAGS) || | |
577 | (vxh->vx_vni & htonl(0xff))) { | |
578 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
579 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
580 | goto error; | |
581 | } | |
582 | ||
583 | __skb_pull(skb, sizeof(struct vxlanhdr)); | |
d342894c | 584 | |
585 | /* Is this VNI defined? */ | |
586 | vni = ntohl(vxh->vx_vni) >> 8; | |
587 | vxlan = vxlan_find_vni(sock_net(sk), vni); | |
588 | if (!vxlan) { | |
589 | netdev_dbg(skb->dev, "unknown vni %d\n", vni); | |
590 | goto drop; | |
591 | } | |
592 | ||
593 | if (!pskb_may_pull(skb, ETH_HLEN)) { | |
594 | vxlan->dev->stats.rx_length_errors++; | |
595 | vxlan->dev->stats.rx_errors++; | |
596 | goto drop; | |
597 | } | |
598 | ||
e4f67add DS |
599 | skb_reset_mac_header(skb); |
600 | ||
d342894c | 601 | /* Re-examine inner Ethernet packet */ |
602 | oip = ip_hdr(skb); | |
603 | skb->protocol = eth_type_trans(skb, vxlan->dev); | |
d342894c | 604 | |
605 | /* Ignore packet loops (and multicast echo) */ | |
606 | if (compare_ether_addr(eth_hdr(skb)->h_source, | |
607 | vxlan->dev->dev_addr) == 0) | |
608 | goto drop; | |
609 | ||
e4f67add | 610 | if (vxlan->flags & VXLAN_F_LEARN) |
d342894c | 611 | vxlan_snoop(skb->dev, oip->saddr, eth_hdr(skb)->h_source); |
612 | ||
613 | __skb_tunnel_rx(skb, vxlan->dev); | |
614 | skb_reset_network_header(skb); | |
0afb1666 JG |
615 | |
616 | /* If the NIC driver gave us an encapsulated packet with | |
617 | * CHECKSUM_UNNECESSARY and Rx checksum feature is enabled, | |
618 | * leave the CHECKSUM_UNNECESSARY, the device checksummed it | |
619 | * for us. Otherwise force the upper layers to verify it. | |
620 | */ | |
621 | if (skb->ip_summed != CHECKSUM_UNNECESSARY || !skb->encapsulation || | |
622 | !(vxlan->dev->features & NETIF_F_RXCSUM)) | |
623 | skb->ip_summed = CHECKSUM_NONE; | |
624 | ||
625 | skb->encapsulation = 0; | |
d342894c | 626 | |
627 | err = IP_ECN_decapsulate(oip, skb); | |
628 | if (unlikely(err)) { | |
629 | if (log_ecn_error) | |
630 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
631 | &oip->saddr, oip->tos); | |
632 | if (err > 1) { | |
633 | ++vxlan->dev->stats.rx_frame_errors; | |
634 | ++vxlan->dev->stats.rx_errors; | |
635 | goto drop; | |
636 | } | |
637 | } | |
638 | ||
639 | stats = this_cpu_ptr(vxlan->stats); | |
640 | u64_stats_update_begin(&stats->syncp); | |
641 | stats->rx_packets++; | |
642 | stats->rx_bytes += skb->len; | |
643 | u64_stats_update_end(&stats->syncp); | |
644 | ||
645 | netif_rx(skb); | |
646 | ||
647 | return 0; | |
648 | error: | |
649 | /* Put UDP header back */ | |
650 | __skb_push(skb, sizeof(struct udphdr)); | |
651 | ||
652 | return 1; | |
653 | drop: | |
654 | /* Consume bad packet */ | |
655 | kfree_skb(skb); | |
656 | return 0; | |
657 | } | |
658 | ||
e4f67add DS |
659 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
660 | { | |
661 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
662 | struct arphdr *parp; | |
663 | u8 *arpptr, *sha; | |
664 | __be32 sip, tip; | |
665 | struct neighbour *n; | |
666 | ||
667 | if (dev->flags & IFF_NOARP) | |
668 | goto out; | |
669 | ||
670 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
671 | dev->stats.tx_dropped++; | |
672 | goto out; | |
673 | } | |
674 | parp = arp_hdr(skb); | |
675 | ||
676 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
677 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
678 | parp->ar_pro != htons(ETH_P_IP) || | |
679 | parp->ar_op != htons(ARPOP_REQUEST) || | |
680 | parp->ar_hln != dev->addr_len || | |
681 | parp->ar_pln != 4) | |
682 | goto out; | |
683 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
684 | sha = arpptr; | |
685 | arpptr += dev->addr_len; /* sha */ | |
686 | memcpy(&sip, arpptr, sizeof(sip)); | |
687 | arpptr += sizeof(sip); | |
688 | arpptr += dev->addr_len; /* tha */ | |
689 | memcpy(&tip, arpptr, sizeof(tip)); | |
690 | ||
691 | if (ipv4_is_loopback(tip) || | |
692 | ipv4_is_multicast(tip)) | |
693 | goto out; | |
694 | ||
695 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
696 | ||
697 | if (n) { | |
698 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
699 | struct vxlan_fdb *f; | |
700 | struct sk_buff *reply; | |
701 | ||
702 | if (!(n->nud_state & NUD_CONNECTED)) { | |
703 | neigh_release(n); | |
704 | goto out; | |
705 | } | |
706 | ||
707 | f = vxlan_find_mac(vxlan, n->ha); | |
708 | if (f && f->remote_ip == 0) { | |
709 | /* bridge-local neighbor */ | |
710 | neigh_release(n); | |
711 | goto out; | |
712 | } | |
713 | ||
714 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
715 | n->ha, sha); | |
716 | ||
717 | neigh_release(n); | |
718 | ||
719 | skb_reset_mac_header(reply); | |
720 | __skb_pull(reply, skb_network_offset(reply)); | |
721 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
722 | reply->pkt_type = PACKET_HOST; | |
723 | ||
724 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
725 | dev->stats.rx_dropped++; | |
726 | } else if (vxlan->flags & VXLAN_F_L3MISS) | |
727 | vxlan_ip_miss(dev, tip); | |
728 | out: | |
729 | consume_skb(skb); | |
730 | return NETDEV_TX_OK; | |
731 | } | |
732 | ||
733 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) | |
734 | { | |
735 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
736 | struct neighbour *n; | |
737 | struct iphdr *pip; | |
738 | ||
739 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
740 | return false; | |
741 | ||
742 | n = NULL; | |
743 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
744 | case ETH_P_IP: | |
745 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) | |
746 | return false; | |
747 | pip = ip_hdr(skb); | |
748 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
749 | break; | |
750 | default: | |
751 | return false; | |
752 | } | |
753 | ||
754 | if (n) { | |
755 | bool diff; | |
756 | ||
757 | diff = compare_ether_addr(eth_hdr(skb)->h_dest, n->ha) != 0; | |
758 | if (diff) { | |
759 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
760 | dev->addr_len); | |
761 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
762 | } | |
763 | neigh_release(n); | |
764 | return diff; | |
765 | } else if (vxlan->flags & VXLAN_F_L3MISS) | |
766 | vxlan_ip_miss(dev, pip->daddr); | |
767 | return false; | |
768 | } | |
769 | ||
d342894c | 770 | /* Extract dsfield from inner protocol */ |
771 | static inline u8 vxlan_get_dsfield(const struct iphdr *iph, | |
772 | const struct sk_buff *skb) | |
773 | { | |
774 | if (skb->protocol == htons(ETH_P_IP)) | |
775 | return iph->tos; | |
776 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
777 | return ipv6_get_dsfield((const struct ipv6hdr *)iph); | |
778 | else | |
779 | return 0; | |
780 | } | |
781 | ||
782 | /* Propogate ECN bits out */ | |
783 | static inline u8 vxlan_ecn_encap(u8 tos, | |
784 | const struct iphdr *iph, | |
785 | const struct sk_buff *skb) | |
786 | { | |
787 | u8 inner = vxlan_get_dsfield(iph, skb); | |
788 | ||
789 | return INET_ECN_encapsulate(tos, inner); | |
790 | } | |
791 | ||
1cad8715 | 792 | static void vxlan_sock_free(struct sk_buff *skb) |
793 | { | |
794 | sock_put(skb->sk); | |
795 | } | |
796 | ||
797 | /* On transmit, associate with the tunnel socket */ | |
798 | static void vxlan_set_owner(struct net_device *dev, struct sk_buff *skb) | |
799 | { | |
800 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
801 | struct sock *sk = vn->sock->sk; | |
802 | ||
803 | skb_orphan(skb); | |
804 | sock_hold(sk); | |
805 | skb->sk = sk; | |
806 | skb->destructor = vxlan_sock_free; | |
807 | } | |
808 | ||
05f47d69 | 809 | /* Compute source port for outgoing packet |
810 | * first choice to use L4 flow hash since it will spread | |
811 | * better and maybe available from hardware | |
812 | * secondary choice is to use jhash on the Ethernet header | |
813 | */ | |
814 | static u16 vxlan_src_port(const struct vxlan_dev *vxlan, struct sk_buff *skb) | |
815 | { | |
816 | unsigned int range = (vxlan->port_max - vxlan->port_min) + 1; | |
817 | u32 hash; | |
818 | ||
819 | hash = skb_get_rxhash(skb); | |
820 | if (!hash) | |
821 | hash = jhash(skb->data, 2 * ETH_ALEN, | |
822 | (__force u32) skb->protocol); | |
823 | ||
824 | return (((u64) hash * range) >> 32) + vxlan->port_min; | |
825 | } | |
826 | ||
d342894c | 827 | /* Transmit local packets over Vxlan |
828 | * | |
829 | * Outer IP header inherits ECN and DF from inner header. | |
830 | * Outer UDP destination is the VXLAN assigned port. | |
05f47d69 | 831 | * source port is based on hash of flow |
d342894c | 832 | */ |
833 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
834 | { | |
835 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
836 | struct rtable *rt; | |
d342894c | 837 | const struct iphdr *old_iph; |
e4f67add | 838 | struct ethhdr *eth; |
d342894c | 839 | struct iphdr *iph; |
840 | struct vxlanhdr *vxh; | |
841 | struct udphdr *uh; | |
842 | struct flowi4 fl4; | |
d342894c | 843 | unsigned int pkt_len = skb->len; |
d342894c | 844 | __be32 dst; |
05f47d69 | 845 | __u16 src_port; |
d342894c | 846 | __be16 df = 0; |
847 | __u8 tos, ttl; | |
848 | int err; | |
e4f67add DS |
849 | bool did_rsc = false; |
850 | const struct vxlan_fdb *f; | |
851 | ||
852 | skb_reset_mac_header(skb); | |
853 | eth = eth_hdr(skb); | |
854 | ||
855 | if ((vxlan->flags & VXLAN_F_PROXY) && ntohs(eth->h_proto) == ETH_P_ARP) | |
856 | return arp_reduce(dev, skb); | |
857 | else if ((vxlan->flags&VXLAN_F_RSC) && ntohs(eth->h_proto) == ETH_P_IP) | |
858 | did_rsc = route_shortcircuit(dev, skb); | |
d342894c | 859 | |
e4f67add DS |
860 | f = vxlan_find_mac(vxlan, eth->h_dest); |
861 | if (f == NULL) { | |
862 | did_rsc = false; | |
863 | dst = vxlan->gaddr; | |
864 | if (!dst && (vxlan->flags & VXLAN_F_L2MISS) && | |
865 | !is_multicast_ether_addr(eth->h_dest)) | |
866 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
867 | } else | |
868 | dst = f->remote_ip; | |
869 | ||
870 | if (!dst) { | |
871 | if (did_rsc) { | |
872 | __skb_pull(skb, skb_network_offset(skb)); | |
873 | skb->ip_summed = CHECKSUM_NONE; | |
874 | skb->pkt_type = PACKET_HOST; | |
875 | ||
876 | /* short-circuited back to local bridge */ | |
877 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
878 | struct vxlan_stats *stats = | |
879 | this_cpu_ptr(vxlan->stats); | |
880 | ||
881 | u64_stats_update_begin(&stats->syncp); | |
882 | stats->tx_packets++; | |
883 | stats->tx_bytes += pkt_len; | |
884 | u64_stats_update_end(&stats->syncp); | |
885 | } else { | |
886 | dev->stats.tx_errors++; | |
887 | dev->stats.tx_aborted_errors++; | |
888 | } | |
889 | return NETDEV_TX_OK; | |
890 | } | |
ef59febe | 891 | goto drop; |
e4f67add | 892 | } |
ef59febe | 893 | |
d6727fe3 JG |
894 | if (!skb->encapsulation) { |
895 | skb_reset_inner_headers(skb); | |
896 | skb->encapsulation = 1; | |
897 | } | |
898 | ||
d342894c | 899 | /* Need space for new headers (invalidates iph ptr) */ |
900 | if (skb_cow_head(skb, VXLAN_HEADROOM)) | |
901 | goto drop; | |
902 | ||
d342894c | 903 | old_iph = ip_hdr(skb); |
904 | ||
d342894c | 905 | ttl = vxlan->ttl; |
906 | if (!ttl && IN_MULTICAST(ntohl(dst))) | |
907 | ttl = 1; | |
908 | ||
909 | tos = vxlan->tos; | |
910 | if (tos == 1) | |
911 | tos = vxlan_get_dsfield(old_iph, skb); | |
912 | ||
05f47d69 | 913 | src_port = vxlan_src_port(vxlan, skb); |
d342894c | 914 | |
ca78f181 | 915 | memset(&fl4, 0, sizeof(fl4)); |
916 | fl4.flowi4_oif = vxlan->link; | |
917 | fl4.flowi4_tos = RT_TOS(tos); | |
918 | fl4.daddr = dst; | |
919 | fl4.saddr = vxlan->saddr; | |
920 | ||
921 | rt = ip_route_output_key(dev_net(dev), &fl4); | |
d342894c | 922 | if (IS_ERR(rt)) { |
923 | netdev_dbg(dev, "no route to %pI4\n", &dst); | |
924 | dev->stats.tx_carrier_errors++; | |
925 | goto tx_error; | |
926 | } | |
927 | ||
928 | if (rt->dst.dev == dev) { | |
929 | netdev_dbg(dev, "circular route to %pI4\n", &dst); | |
930 | ip_rt_put(rt); | |
931 | dev->stats.collisions++; | |
932 | goto tx_error; | |
933 | } | |
934 | ||
935 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); | |
936 | IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | | |
937 | IPSKB_REROUTED); | |
938 | skb_dst_drop(skb); | |
939 | skb_dst_set(skb, &rt->dst); | |
940 | ||
941 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); | |
942 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
943 | vxh->vx_vni = htonl(vxlan->vni << 8); | |
944 | ||
945 | __skb_push(skb, sizeof(*uh)); | |
946 | skb_reset_transport_header(skb); | |
947 | uh = udp_hdr(skb); | |
948 | ||
949 | uh->dest = htons(vxlan_port); | |
05f47d69 | 950 | uh->source = htons(src_port); |
d342894c | 951 | |
952 | uh->len = htons(skb->len); | |
953 | uh->check = 0; | |
954 | ||
955 | __skb_push(skb, sizeof(*iph)); | |
956 | skb_reset_network_header(skb); | |
957 | iph = ip_hdr(skb); | |
958 | iph->version = 4; | |
959 | iph->ihl = sizeof(struct iphdr) >> 2; | |
960 | iph->frag_off = df; | |
961 | iph->protocol = IPPROTO_UDP; | |
962 | iph->tos = vxlan_ecn_encap(tos, old_iph, skb); | |
ca78f181 | 963 | iph->daddr = dst; |
d342894c | 964 | iph->saddr = fl4.saddr; |
965 | iph->ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
8dc98eb2 | 966 | tunnel_ip_select_ident(skb, old_iph, &rt->dst); |
d342894c | 967 | |
1cad8715 | 968 | vxlan_set_owner(dev, skb); |
969 | ||
aa0010f8 | 970 | /* See iptunnel_xmit() */ |
d6727fe3 JG |
971 | if (skb->ip_summed != CHECKSUM_PARTIAL) |
972 | skb->ip_summed = CHECKSUM_NONE; | |
d342894c | 973 | |
974 | err = ip_local_out(skb); | |
975 | if (likely(net_xmit_eval(err) == 0)) { | |
976 | struct vxlan_stats *stats = this_cpu_ptr(vxlan->stats); | |
977 | ||
978 | u64_stats_update_begin(&stats->syncp); | |
979 | stats->tx_packets++; | |
980 | stats->tx_bytes += pkt_len; | |
981 | u64_stats_update_end(&stats->syncp); | |
982 | } else { | |
983 | dev->stats.tx_errors++; | |
984 | dev->stats.tx_aborted_errors++; | |
985 | } | |
986 | return NETDEV_TX_OK; | |
987 | ||
988 | drop: | |
989 | dev->stats.tx_dropped++; | |
990 | goto tx_free; | |
991 | ||
992 | tx_error: | |
993 | dev->stats.tx_errors++; | |
994 | tx_free: | |
995 | dev_kfree_skb(skb); | |
996 | return NETDEV_TX_OK; | |
997 | } | |
998 | ||
999 | /* Walk the forwarding table and purge stale entries */ | |
1000 | static void vxlan_cleanup(unsigned long arg) | |
1001 | { | |
1002 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
1003 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
1004 | unsigned int h; | |
1005 | ||
1006 | if (!netif_running(vxlan->dev)) | |
1007 | return; | |
1008 | ||
1009 | spin_lock_bh(&vxlan->hash_lock); | |
1010 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1011 | struct hlist_node *p, *n; | |
1012 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1013 | struct vxlan_fdb *f | |
1014 | = container_of(p, struct vxlan_fdb, hlist); | |
1015 | unsigned long timeout; | |
1016 | ||
3c172868 | 1017 | if (f->state & NUD_PERMANENT) |
d342894c | 1018 | continue; |
1019 | ||
1020 | timeout = f->used + vxlan->age_interval * HZ; | |
1021 | if (time_before_eq(timeout, jiffies)) { | |
1022 | netdev_dbg(vxlan->dev, | |
1023 | "garbage collect %pM\n", | |
1024 | f->eth_addr); | |
1025 | f->state = NUD_STALE; | |
1026 | vxlan_fdb_destroy(vxlan, f); | |
1027 | } else if (time_before(timeout, next_timer)) | |
1028 | next_timer = timeout; | |
1029 | } | |
1030 | } | |
1031 | spin_unlock_bh(&vxlan->hash_lock); | |
1032 | ||
1033 | mod_timer(&vxlan->age_timer, next_timer); | |
1034 | } | |
1035 | ||
1036 | /* Setup stats when device is created */ | |
1037 | static int vxlan_init(struct net_device *dev) | |
1038 | { | |
1039 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1040 | ||
1041 | vxlan->stats = alloc_percpu(struct vxlan_stats); | |
1042 | if (!vxlan->stats) | |
1043 | return -ENOMEM; | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | /* Start ageing timer and join group when device is brought up */ | |
1049 | static int vxlan_open(struct net_device *dev) | |
1050 | { | |
1051 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1052 | int err; | |
1053 | ||
1054 | if (vxlan->gaddr) { | |
1055 | err = vxlan_join_group(dev); | |
1056 | if (err) | |
1057 | return err; | |
1058 | } | |
1059 | ||
1060 | if (vxlan->age_interval) | |
1061 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | /* Purge the forwarding table */ | |
1067 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
1068 | { | |
1069 | unsigned h; | |
1070 | ||
1071 | spin_lock_bh(&vxlan->hash_lock); | |
1072 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1073 | struct hlist_node *p, *n; | |
1074 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1075 | struct vxlan_fdb *f | |
1076 | = container_of(p, struct vxlan_fdb, hlist); | |
1077 | vxlan_fdb_destroy(vxlan, f); | |
1078 | } | |
1079 | } | |
1080 | spin_unlock_bh(&vxlan->hash_lock); | |
1081 | } | |
1082 | ||
1083 | /* Cleanup timer and forwarding table on shutdown */ | |
1084 | static int vxlan_stop(struct net_device *dev) | |
1085 | { | |
1086 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1087 | ||
1088 | if (vxlan->gaddr) | |
1089 | vxlan_leave_group(dev); | |
1090 | ||
1091 | del_timer_sync(&vxlan->age_timer); | |
1092 | ||
1093 | vxlan_flush(vxlan); | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | /* Merge per-cpu statistics */ | |
1099 | static struct rtnl_link_stats64 *vxlan_stats64(struct net_device *dev, | |
1100 | struct rtnl_link_stats64 *stats) | |
1101 | { | |
1102 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1103 | struct vxlan_stats tmp, sum = { 0 }; | |
1104 | unsigned int cpu; | |
1105 | ||
1106 | for_each_possible_cpu(cpu) { | |
1107 | unsigned int start; | |
1108 | const struct vxlan_stats *stats | |
1109 | = per_cpu_ptr(vxlan->stats, cpu); | |
1110 | ||
1111 | do { | |
1112 | start = u64_stats_fetch_begin_bh(&stats->syncp); | |
1113 | memcpy(&tmp, stats, sizeof(tmp)); | |
1114 | } while (u64_stats_fetch_retry_bh(&stats->syncp, start)); | |
1115 | ||
1116 | sum.tx_bytes += tmp.tx_bytes; | |
1117 | sum.tx_packets += tmp.tx_packets; | |
1118 | sum.rx_bytes += tmp.rx_bytes; | |
1119 | sum.rx_packets += tmp.rx_packets; | |
1120 | } | |
1121 | ||
1122 | stats->tx_bytes = sum.tx_bytes; | |
1123 | stats->tx_packets = sum.tx_packets; | |
1124 | stats->rx_bytes = sum.rx_bytes; | |
1125 | stats->rx_packets = sum.rx_packets; | |
1126 | ||
1127 | stats->multicast = dev->stats.multicast; | |
1128 | stats->rx_length_errors = dev->stats.rx_length_errors; | |
1129 | stats->rx_frame_errors = dev->stats.rx_frame_errors; | |
1130 | stats->rx_errors = dev->stats.rx_errors; | |
1131 | ||
1132 | stats->tx_dropped = dev->stats.tx_dropped; | |
1133 | stats->tx_carrier_errors = dev->stats.tx_carrier_errors; | |
1134 | stats->tx_aborted_errors = dev->stats.tx_aborted_errors; | |
1135 | stats->collisions = dev->stats.collisions; | |
1136 | stats->tx_errors = dev->stats.tx_errors; | |
1137 | ||
1138 | return stats; | |
1139 | } | |
1140 | ||
1141 | /* Stub, nothing needs to be done. */ | |
1142 | static void vxlan_set_multicast_list(struct net_device *dev) | |
1143 | { | |
1144 | } | |
1145 | ||
1146 | static const struct net_device_ops vxlan_netdev_ops = { | |
1147 | .ndo_init = vxlan_init, | |
1148 | .ndo_open = vxlan_open, | |
1149 | .ndo_stop = vxlan_stop, | |
1150 | .ndo_start_xmit = vxlan_xmit, | |
1151 | .ndo_get_stats64 = vxlan_stats64, | |
1152 | .ndo_set_rx_mode = vxlan_set_multicast_list, | |
1153 | .ndo_change_mtu = eth_change_mtu, | |
1154 | .ndo_validate_addr = eth_validate_addr, | |
1155 | .ndo_set_mac_address = eth_mac_addr, | |
1156 | .ndo_fdb_add = vxlan_fdb_add, | |
1157 | .ndo_fdb_del = vxlan_fdb_delete, | |
1158 | .ndo_fdb_dump = vxlan_fdb_dump, | |
1159 | }; | |
1160 | ||
1161 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1162 | static struct device_type vxlan_type = { | |
1163 | .name = "vxlan", | |
1164 | }; | |
1165 | ||
1166 | static void vxlan_free(struct net_device *dev) | |
1167 | { | |
1168 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1169 | ||
1170 | free_percpu(vxlan->stats); | |
1171 | free_netdev(dev); | |
1172 | } | |
1173 | ||
1174 | /* Initialize the device structure. */ | |
1175 | static void vxlan_setup(struct net_device *dev) | |
1176 | { | |
1177 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1178 | unsigned h; | |
05f47d69 | 1179 | int low, high; |
d342894c | 1180 | |
1181 | eth_hw_addr_random(dev); | |
1182 | ether_setup(dev); | |
2840bf22 | 1183 | dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM; |
d342894c | 1184 | |
1185 | dev->netdev_ops = &vxlan_netdev_ops; | |
1186 | dev->destructor = vxlan_free; | |
1187 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); | |
1188 | ||
1189 | dev->tx_queue_len = 0; | |
1190 | dev->features |= NETIF_F_LLTX; | |
1191 | dev->features |= NETIF_F_NETNS_LOCAL; | |
d6727fe3 | 1192 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 JG |
1193 | dev->features |= NETIF_F_RXCSUM; |
1194 | ||
1195 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; | |
d342894c | 1196 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
6602d007 | 1197 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 1198 | |
1199 | spin_lock_init(&vxlan->hash_lock); | |
1200 | ||
1201 | init_timer_deferrable(&vxlan->age_timer); | |
1202 | vxlan->age_timer.function = vxlan_cleanup; | |
1203 | vxlan->age_timer.data = (unsigned long) vxlan; | |
1204 | ||
05f47d69 | 1205 | inet_get_local_port_range(&low, &high); |
1206 | vxlan->port_min = low; | |
1207 | vxlan->port_max = high; | |
1208 | ||
d342894c | 1209 | vxlan->dev = dev; |
1210 | ||
1211 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
1212 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
1213 | } | |
1214 | ||
1215 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
1216 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
1217 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
1218 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, | |
1219 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
1220 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, | |
1221 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
1222 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
1223 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
1224 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 1225 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
1226 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
1227 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
1228 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
1229 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
d342894c | 1230 | }; |
1231 | ||
1232 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1233 | { | |
1234 | if (tb[IFLA_ADDRESS]) { | |
1235 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
1236 | pr_debug("invalid link address (not ethernet)\n"); | |
1237 | return -EINVAL; | |
1238 | } | |
1239 | ||
1240 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
1241 | pr_debug("invalid all zero ethernet address\n"); | |
1242 | return -EADDRNOTAVAIL; | |
1243 | } | |
1244 | } | |
1245 | ||
1246 | if (!data) | |
1247 | return -EINVAL; | |
1248 | ||
1249 | if (data[IFLA_VXLAN_ID]) { | |
1250 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
1251 | if (id >= VXLAN_VID_MASK) | |
1252 | return -ERANGE; | |
1253 | } | |
1254 | ||
1255 | if (data[IFLA_VXLAN_GROUP]) { | |
1256 | __be32 gaddr = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
1257 | if (!IN_MULTICAST(ntohl(gaddr))) { | |
1258 | pr_debug("group address is not IPv4 multicast\n"); | |
1259 | return -EADDRNOTAVAIL; | |
1260 | } | |
1261 | } | |
05f47d69 | 1262 | |
1263 | if (data[IFLA_VXLAN_PORT_RANGE]) { | |
1264 | const struct ifla_vxlan_port_range *p | |
1265 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
1266 | ||
1267 | if (ntohs(p->high) < ntohs(p->low)) { | |
1268 | pr_debug("port range %u .. %u not valid\n", | |
1269 | ntohs(p->low), ntohs(p->high)); | |
1270 | return -EINVAL; | |
1271 | } | |
1272 | } | |
1273 | ||
d342894c | 1274 | return 0; |
1275 | } | |
1276 | ||
1b13c97f YB |
1277 | static void vxlan_get_drvinfo(struct net_device *netdev, |
1278 | struct ethtool_drvinfo *drvinfo) | |
1279 | { | |
1280 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
1281 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
1282 | } | |
1283 | ||
1284 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
1285 | .get_drvinfo = vxlan_get_drvinfo, | |
1286 | .get_link = ethtool_op_get_link, | |
1287 | }; | |
1288 | ||
d342894c | 1289 | static int vxlan_newlink(struct net *net, struct net_device *dev, |
1290 | struct nlattr *tb[], struct nlattr *data[]) | |
1291 | { | |
1292 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1293 | __u32 vni; | |
1294 | int err; | |
1295 | ||
1296 | if (!data[IFLA_VXLAN_ID]) | |
1297 | return -EINVAL; | |
1298 | ||
1299 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); | |
1300 | if (vxlan_find_vni(net, vni)) { | |
1301 | pr_info("duplicate VNI %u\n", vni); | |
1302 | return -EEXIST; | |
1303 | } | |
1304 | vxlan->vni = vni; | |
1305 | ||
1306 | if (data[IFLA_VXLAN_GROUP]) | |
1307 | vxlan->gaddr = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
1308 | ||
1309 | if (data[IFLA_VXLAN_LOCAL]) | |
1310 | vxlan->saddr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
1311 | ||
34e02aa1 | 1312 | if (data[IFLA_VXLAN_LINK] && |
1313 | (vxlan->link = nla_get_u32(data[IFLA_VXLAN_LINK]))) { | |
1314 | struct net_device *lowerdev | |
1315 | = __dev_get_by_index(net, vxlan->link); | |
1316 | ||
1317 | if (!lowerdev) { | |
1318 | pr_info("ifindex %d does not exist\n", vxlan->link); | |
1319 | return -ENODEV; | |
1320 | } | |
d342894c | 1321 | |
34e02aa1 | 1322 | if (!tb[IFLA_MTU]) |
d342894c | 1323 | dev->mtu = lowerdev->mtu - VXLAN_HEADROOM; |
1ba56fb4 AD |
1324 | |
1325 | /* update header length based on lower device */ | |
1326 | dev->hard_header_len = lowerdev->hard_header_len + | |
1327 | VXLAN_HEADROOM; | |
d342894c | 1328 | } |
1329 | ||
1330 | if (data[IFLA_VXLAN_TOS]) | |
1331 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
1332 | ||
afb97186 VB |
1333 | if (data[IFLA_VXLAN_TTL]) |
1334 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
1335 | ||
d342894c | 1336 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 1337 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 1338 | |
1339 | if (data[IFLA_VXLAN_AGEING]) | |
1340 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
1341 | else | |
1342 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
1343 | ||
e4f67add DS |
1344 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
1345 | vxlan->flags |= VXLAN_F_PROXY; | |
1346 | ||
1347 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
1348 | vxlan->flags |= VXLAN_F_RSC; | |
1349 | ||
1350 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
1351 | vxlan->flags |= VXLAN_F_L2MISS; | |
1352 | ||
1353 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
1354 | vxlan->flags |= VXLAN_F_L3MISS; | |
1355 | ||
d342894c | 1356 | if (data[IFLA_VXLAN_LIMIT]) |
1357 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
1358 | ||
05f47d69 | 1359 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
1360 | const struct ifla_vxlan_port_range *p | |
1361 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
1362 | vxlan->port_min = ntohs(p->low); | |
1363 | vxlan->port_max = ntohs(p->high); | |
1364 | } | |
1365 | ||
1b13c97f YB |
1366 | SET_ETHTOOL_OPS(dev, &vxlan_ethtool_ops); |
1367 | ||
d342894c | 1368 | err = register_netdevice(dev); |
1369 | if (!err) | |
1370 | hlist_add_head_rcu(&vxlan->hlist, vni_head(net, vxlan->vni)); | |
1371 | ||
1372 | return err; | |
1373 | } | |
1374 | ||
1375 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
1376 | { | |
1377 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1378 | ||
1379 | hlist_del_rcu(&vxlan->hlist); | |
1380 | ||
1381 | unregister_netdevice_queue(dev, head); | |
1382 | } | |
1383 | ||
1384 | static size_t vxlan_get_size(const struct net_device *dev) | |
1385 | { | |
1386 | ||
1387 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
1388 | nla_total_size(sizeof(__be32)) +/* IFLA_VXLAN_GROUP */ | |
1389 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ | |
1390 | nla_total_size(sizeof(__be32))+ /* IFLA_VXLAN_LOCAL */ | |
1391 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ | |
1392 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
1393 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
1394 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
1395 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
1396 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
1397 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 1398 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
1399 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 1400 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
d342894c | 1401 | 0; |
1402 | } | |
1403 | ||
1404 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1405 | { | |
1406 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
05f47d69 | 1407 | struct ifla_vxlan_port_range ports = { |
1408 | .low = htons(vxlan->port_min), | |
1409 | .high = htons(vxlan->port_max), | |
1410 | }; | |
d342894c | 1411 | |
1412 | if (nla_put_u32(skb, IFLA_VXLAN_ID, vxlan->vni)) | |
1413 | goto nla_put_failure; | |
1414 | ||
7c41c42c | 1415 | if (vxlan->gaddr && nla_put_be32(skb, IFLA_VXLAN_GROUP, vxlan->gaddr)) |
d342894c | 1416 | goto nla_put_failure; |
1417 | ||
1418 | if (vxlan->link && nla_put_u32(skb, IFLA_VXLAN_LINK, vxlan->link)) | |
1419 | goto nla_put_failure; | |
1420 | ||
7c41c42c | 1421 | if (vxlan->saddr && nla_put_be32(skb, IFLA_VXLAN_LOCAL, vxlan->saddr)) |
d342894c | 1422 | goto nla_put_failure; |
1423 | ||
1424 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
1425 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
1426 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
1427 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
1428 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
1429 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
1430 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
1431 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
1432 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
1433 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
1434 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 1435 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
1436 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax)) | |
1437 | goto nla_put_failure; | |
1438 | ||
05f47d69 | 1439 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
1440 | goto nla_put_failure; | |
1441 | ||
d342894c | 1442 | return 0; |
1443 | ||
1444 | nla_put_failure: | |
1445 | return -EMSGSIZE; | |
1446 | } | |
1447 | ||
1448 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { | |
1449 | .kind = "vxlan", | |
1450 | .maxtype = IFLA_VXLAN_MAX, | |
1451 | .policy = vxlan_policy, | |
1452 | .priv_size = sizeof(struct vxlan_dev), | |
1453 | .setup = vxlan_setup, | |
1454 | .validate = vxlan_validate, | |
1455 | .newlink = vxlan_newlink, | |
1456 | .dellink = vxlan_dellink, | |
1457 | .get_size = vxlan_get_size, | |
1458 | .fill_info = vxlan_fill_info, | |
1459 | }; | |
1460 | ||
1461 | static __net_init int vxlan_init_net(struct net *net) | |
1462 | { | |
1463 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
1464 | struct sock *sk; | |
1465 | struct sockaddr_in vxlan_addr = { | |
1466 | .sin_family = AF_INET, | |
1467 | .sin_addr.s_addr = htonl(INADDR_ANY), | |
1468 | }; | |
1469 | int rc; | |
1470 | unsigned h; | |
1471 | ||
1472 | /* Create UDP socket for encapsulation receive. */ | |
1473 | rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &vn->sock); | |
1474 | if (rc < 0) { | |
1475 | pr_debug("UDP socket create failed\n"); | |
1476 | return rc; | |
1477 | } | |
bfe1b9b1 | 1478 | /* Put in proper namespace */ |
1479 | sk = vn->sock->sk; | |
1480 | sk_change_net(sk, net); | |
d342894c | 1481 | |
1482 | vxlan_addr.sin_port = htons(vxlan_port); | |
1483 | ||
1484 | rc = kernel_bind(vn->sock, (struct sockaddr *) &vxlan_addr, | |
1485 | sizeof(vxlan_addr)); | |
1486 | if (rc < 0) { | |
1487 | pr_debug("bind for UDP socket %pI4:%u (%d)\n", | |
1488 | &vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc); | |
bfe1b9b1 | 1489 | sk_release_kernel(sk); |
d342894c | 1490 | vn->sock = NULL; |
1491 | return rc; | |
1492 | } | |
1493 | ||
1494 | /* Disable multicast loopback */ | |
d342894c | 1495 | inet_sk(sk)->mc_loop = 0; |
1496 | ||
1497 | /* Mark socket as an encapsulation socket. */ | |
1498 | udp_sk(sk)->encap_type = 1; | |
1499 | udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; | |
1500 | udp_encap_enable(); | |
1501 | ||
1502 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
1503 | INIT_HLIST_HEAD(&vn->vni_list[h]); | |
1504 | ||
1505 | return 0; | |
1506 | } | |
1507 | ||
1508 | static __net_exit void vxlan_exit_net(struct net *net) | |
1509 | { | |
1510 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
1511 | ||
1512 | if (vn->sock) { | |
bfe1b9b1 | 1513 | sk_release_kernel(vn->sock->sk); |
d342894c | 1514 | vn->sock = NULL; |
1515 | } | |
1516 | } | |
1517 | ||
1518 | static struct pernet_operations vxlan_net_ops = { | |
1519 | .init = vxlan_init_net, | |
1520 | .exit = vxlan_exit_net, | |
1521 | .id = &vxlan_net_id, | |
1522 | .size = sizeof(struct vxlan_net), | |
1523 | }; | |
1524 | ||
1525 | static int __init vxlan_init_module(void) | |
1526 | { | |
1527 | int rc; | |
1528 | ||
1529 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); | |
1530 | ||
1531 | rc = register_pernet_device(&vxlan_net_ops); | |
1532 | if (rc) | |
1533 | goto out1; | |
1534 | ||
1535 | rc = rtnl_link_register(&vxlan_link_ops); | |
1536 | if (rc) | |
1537 | goto out2; | |
1538 | ||
1539 | return 0; | |
1540 | ||
1541 | out2: | |
1542 | unregister_pernet_device(&vxlan_net_ops); | |
1543 | out1: | |
1544 | return rc; | |
1545 | } | |
1546 | module_init(vxlan_init_module); | |
1547 | ||
1548 | static void __exit vxlan_cleanup_module(void) | |
1549 | { | |
1550 | rtnl_link_unregister(&vxlan_link_ops); | |
1551 | unregister_pernet_device(&vxlan_net_ops); | |
1552 | } | |
1553 | module_exit(vxlan_cleanup_module); | |
1554 | ||
1555 | MODULE_LICENSE("GPL"); | |
1556 | MODULE_VERSION(VXLAN_VERSION); | |
1557 | MODULE_AUTHOR("Stephen Hemminger <shemminger@vyatta.com>"); | |
1558 | MODULE_ALIAS_RTNL_LINK("vxlan"); |