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; |
3fc2de2f | 139 | struct work_struct igmp_join; |
140 | struct work_struct igmp_leave; | |
1c51a915 | 141 | |
d342894c | 142 | unsigned long age_interval; |
143 | struct timer_list age_timer; | |
144 | spinlock_t hash_lock; | |
145 | unsigned int addrcnt; | |
146 | unsigned int addrmax; | |
d342894c | 147 | |
148 | struct hlist_head fdb_head[FDB_HASH_SIZE]; | |
149 | }; | |
150 | ||
e4f67add DS |
151 | #define VXLAN_F_LEARN 0x01 |
152 | #define VXLAN_F_PROXY 0x02 | |
153 | #define VXLAN_F_RSC 0x04 | |
154 | #define VXLAN_F_L2MISS 0x08 | |
155 | #define VXLAN_F_L3MISS 0x10 | |
156 | ||
d342894c | 157 | /* salt for hash table */ |
158 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 159 | static struct workqueue_struct *vxlan_wq; |
d342894c | 160 | |
1c51a915 SH |
161 | static void vxlan_sock_work(struct work_struct *work); |
162 | ||
553675fb | 163 | /* Virtual Network hash table head */ |
164 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
165 | { | |
166 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
167 | } | |
168 | ||
169 | /* Socket hash table head */ | |
170 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 171 | { |
172 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
173 | ||
553675fb | 174 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
175 | } | |
176 | ||
3e61aa8f SH |
177 | /* First remote destination for a forwarding entry. |
178 | * Guaranteed to be non-NULL because remotes are never deleted. | |
179 | */ | |
180 | static inline struct vxlan_rdst *first_remote(struct vxlan_fdb *fdb) | |
181 | { | |
182 | return list_first_or_null_rcu(&fdb->remotes, struct vxlan_rdst, list); | |
183 | } | |
184 | ||
553675fb | 185 | /* Find VXLAN socket based on network namespace and UDP port */ |
186 | static struct vxlan_sock *vxlan_find_port(struct net *net, __be16 port) | |
187 | { | |
188 | struct vxlan_sock *vs; | |
189 | ||
190 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
191 | if (inet_sk(vs->sock->sk)->inet_sport == port) | |
192 | return vs; | |
193 | } | |
194 | return NULL; | |
d342894c | 195 | } |
196 | ||
197 | /* Look up VNI in a per net namespace table */ | |
553675fb | 198 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, __be16 port) |
d342894c | 199 | { |
553675fb | 200 | struct vxlan_sock *vs; |
d342894c | 201 | struct vxlan_dev *vxlan; |
d342894c | 202 | |
553675fb | 203 | vs = vxlan_find_port(net, port); |
204 | if (!vs) | |
205 | return NULL; | |
206 | ||
207 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { | |
c7995c43 | 208 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 209 | return vxlan; |
210 | } | |
211 | ||
212 | return NULL; | |
213 | } | |
214 | ||
215 | /* Fill in neighbour message in skbuff. */ | |
216 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
217 | const struct vxlan_fdb *fdb, |
218 | u32 portid, u32 seq, int type, unsigned int flags, | |
219 | const struct vxlan_rdst *rdst) | |
d342894c | 220 | { |
221 | unsigned long now = jiffies; | |
222 | struct nda_cacheinfo ci; | |
223 | struct nlmsghdr *nlh; | |
224 | struct ndmsg *ndm; | |
e4f67add | 225 | bool send_ip, send_eth; |
d342894c | 226 | |
227 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
228 | if (nlh == NULL) | |
229 | return -EMSGSIZE; | |
230 | ||
231 | ndm = nlmsg_data(nlh); | |
232 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
233 | |
234 | send_eth = send_ip = true; | |
235 | ||
236 | if (type == RTM_GETNEIGH) { | |
237 | ndm->ndm_family = AF_INET; | |
6681712d | 238 | send_ip = rdst->remote_ip != htonl(INADDR_ANY); |
e4f67add DS |
239 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
240 | } else | |
241 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 242 | ndm->ndm_state = fdb->state; |
243 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 244 | ndm->ndm_flags = fdb->flags; |
d342894c | 245 | ndm->ndm_type = NDA_DST; |
246 | ||
e4f67add | 247 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 248 | goto nla_put_failure; |
249 | ||
6681712d DS |
250 | if (send_ip && nla_put_be32(skb, NDA_DST, rdst->remote_ip)) |
251 | goto nla_put_failure; | |
252 | ||
823aa873 | 253 | if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && |
6681712d DS |
254 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
255 | goto nla_put_failure; | |
c7995c43 | 256 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 257 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
258 | goto nla_put_failure; |
259 | if (rdst->remote_ifindex && | |
260 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 261 | goto nla_put_failure; |
262 | ||
263 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
264 | ci.ndm_confirmed = 0; | |
265 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
266 | ci.ndm_refcnt = 0; | |
267 | ||
268 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
269 | goto nla_put_failure; | |
270 | ||
271 | return nlmsg_end(skb, nlh); | |
272 | ||
273 | nla_put_failure: | |
274 | nlmsg_cancel(skb, nlh); | |
275 | return -EMSGSIZE; | |
276 | } | |
277 | ||
278 | static inline size_t vxlan_nlmsg_size(void) | |
279 | { | |
280 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
281 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
282 | + nla_total_size(sizeof(__be32)) /* NDA_DST */ | |
73cf3317 | 283 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
284 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
285 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
d342894c | 286 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
287 | } | |
288 | ||
289 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, | |
3e61aa8f | 290 | struct vxlan_fdb *fdb, int type) |
d342894c | 291 | { |
292 | struct net *net = dev_net(vxlan->dev); | |
293 | struct sk_buff *skb; | |
294 | int err = -ENOBUFS; | |
295 | ||
296 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
297 | if (skb == NULL) | |
298 | goto errout; | |
299 | ||
3e61aa8f | 300 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, first_remote(fdb)); |
d342894c | 301 | if (err < 0) { |
302 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
303 | WARN_ON(err == -EMSGSIZE); | |
304 | kfree_skb(skb); | |
305 | goto errout; | |
306 | } | |
307 | ||
308 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
309 | return; | |
310 | errout: | |
311 | if (err < 0) | |
312 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
313 | } | |
314 | ||
e4f67add DS |
315 | static void vxlan_ip_miss(struct net_device *dev, __be32 ipa) |
316 | { | |
317 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
318 | struct vxlan_fdb f = { |
319 | .state = NUD_STALE, | |
320 | }; | |
321 | struct vxlan_rdst remote = { | |
322 | .remote_ip = ipa, /* goes to NDA_DST */ | |
323 | .remote_vni = VXLAN_N_VID, | |
324 | }; | |
3e61aa8f SH |
325 | |
326 | INIT_LIST_HEAD(&f.remotes); | |
327 | list_add_rcu(&remote.list, &f.remotes); | |
e4f67add DS |
328 | |
329 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
330 | } | |
331 | ||
332 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
333 | { | |
bb3fd687 SH |
334 | struct vxlan_fdb f = { |
335 | .state = NUD_STALE, | |
336 | }; | |
e4f67add | 337 | |
3e61aa8f | 338 | INIT_LIST_HEAD(&f.remotes); |
e4f67add DS |
339 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
340 | ||
341 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
342 | } | |
343 | ||
d342894c | 344 | /* Hash Ethernet address */ |
345 | static u32 eth_hash(const unsigned char *addr) | |
346 | { | |
347 | u64 value = get_unaligned((u64 *)addr); | |
348 | ||
349 | /* only want 6 bytes */ | |
350 | #ifdef __BIG_ENDIAN | |
d342894c | 351 | value >>= 16; |
321fb991 | 352 | #else |
353 | value <<= 16; | |
d342894c | 354 | #endif |
355 | return hash_64(value, FDB_HASH_BITS); | |
356 | } | |
357 | ||
358 | /* Hash chain to use given mac address */ | |
359 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
360 | const u8 *mac) | |
361 | { | |
362 | return &vxlan->fdb_head[eth_hash(mac)]; | |
363 | } | |
364 | ||
365 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 366 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 367 | const u8 *mac) |
368 | ||
369 | { | |
370 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
371 | struct vxlan_fdb *f; | |
d342894c | 372 | |
b67bfe0d | 373 | hlist_for_each_entry_rcu(f, head, hlist) { |
d342894c | 374 | if (compare_ether_addr(mac, f->eth_addr) == 0) |
375 | return f; | |
376 | } | |
377 | ||
378 | return NULL; | |
379 | } | |
380 | ||
014be2c8 SS |
381 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
382 | const u8 *mac) | |
383 | { | |
384 | struct vxlan_fdb *f; | |
385 | ||
386 | f = __vxlan_find_mac(vxlan, mac); | |
387 | if (f) | |
388 | f->used = jiffies; | |
389 | ||
390 | return f; | |
391 | } | |
392 | ||
a5e7c10a MR |
393 | /* caller should hold vxlan->hash_lock */ |
394 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
395 | __be32 ip, __be16 port, | |
396 | __u32 vni, __u32 ifindex) | |
6681712d | 397 | { |
3e61aa8f | 398 | struct vxlan_rdst *rd; |
6681712d | 399 | |
3e61aa8f | 400 | list_for_each_entry(rd, &f->remotes, list) { |
6681712d DS |
401 | if (rd->remote_ip == ip && |
402 | rd->remote_port == port && | |
403 | rd->remote_vni == vni && | |
404 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 405 | return rd; |
6681712d | 406 | } |
3e61aa8f | 407 | |
a5e7c10a MR |
408 | return NULL; |
409 | } | |
410 | ||
411 | /* Add/update destinations for multicast */ | |
412 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
413 | __be32 ip, __be16 port, __u32 vni, __u32 ifindex) | |
414 | { | |
415 | struct vxlan_rdst *rd; | |
416 | ||
417 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
418 | if (rd) | |
419 | return 0; | |
420 | ||
6681712d DS |
421 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
422 | if (rd == NULL) | |
423 | return -ENOBUFS; | |
424 | rd->remote_ip = ip; | |
425 | rd->remote_port = port; | |
426 | rd->remote_vni = vni; | |
427 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
428 | |
429 | list_add_tail_rcu(&rd->list, &f->remotes); | |
430 | ||
6681712d DS |
431 | return 1; |
432 | } | |
433 | ||
d342894c | 434 | /* Add new entry to forwarding table -- assumes lock held */ |
435 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
436 | const u8 *mac, __be32 ip, | |
6681712d | 437 | __u16 state, __u16 flags, |
73cf3317 | 438 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 439 | __u8 ndm_flags) |
d342894c | 440 | { |
441 | struct vxlan_fdb *f; | |
442 | int notify = 0; | |
443 | ||
014be2c8 | 444 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 445 | if (f) { |
446 | if (flags & NLM_F_EXCL) { | |
447 | netdev_dbg(vxlan->dev, | |
448 | "lost race to create %pM\n", mac); | |
449 | return -EEXIST; | |
450 | } | |
451 | if (f->state != state) { | |
452 | f->state = state; | |
453 | f->updated = jiffies; | |
454 | notify = 1; | |
455 | } | |
ae884082 DS |
456 | if (f->flags != ndm_flags) { |
457 | f->flags = ndm_flags; | |
458 | f->updated = jiffies; | |
459 | notify = 1; | |
460 | } | |
6681712d | 461 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
462 | (is_multicast_ether_addr(f->eth_addr) || |
463 | is_zero_ether_addr(f->eth_addr))) { | |
6681712d DS |
464 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex); |
465 | ||
466 | if (rc < 0) | |
467 | return rc; | |
468 | notify |= rc; | |
469 | } | |
d342894c | 470 | } else { |
471 | if (!(flags & NLM_F_CREATE)) | |
472 | return -ENOENT; | |
473 | ||
474 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
475 | return -ENOSPC; | |
476 | ||
477 | netdev_dbg(vxlan->dev, "add %pM -> %pI4\n", mac, &ip); | |
478 | f = kmalloc(sizeof(*f), GFP_ATOMIC); | |
479 | if (!f) | |
480 | return -ENOMEM; | |
481 | ||
482 | notify = 1; | |
d342894c | 483 | f->state = state; |
ae884082 | 484 | f->flags = ndm_flags; |
d342894c | 485 | f->updated = f->used = jiffies; |
3e61aa8f | 486 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 487 | memcpy(f->eth_addr, mac, ETH_ALEN); |
488 | ||
3e61aa8f SH |
489 | vxlan_fdb_append(f, ip, port, vni, ifindex); |
490 | ||
d342894c | 491 | ++vxlan->addrcnt; |
492 | hlist_add_head_rcu(&f->hlist, | |
493 | vxlan_fdb_head(vxlan, mac)); | |
494 | } | |
495 | ||
496 | if (notify) | |
497 | vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH); | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
bc7892ba MR |
502 | static void vxlan_fdb_free_rdst(struct rcu_head *head) |
503 | { | |
504 | struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); | |
505 | kfree(rd); | |
506 | } | |
507 | ||
6706c82e | 508 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
509 | { |
510 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 511 | struct vxlan_rdst *rd, *nd; |
6681712d | 512 | |
3e61aa8f | 513 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 514 | kfree(rd); |
6681712d DS |
515 | kfree(f); |
516 | } | |
517 | ||
d342894c | 518 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
519 | { | |
520 | netdev_dbg(vxlan->dev, | |
521 | "delete %pM\n", f->eth_addr); | |
522 | ||
523 | --vxlan->addrcnt; | |
524 | vxlan_fdb_notify(vxlan, f, RTM_DELNEIGH); | |
525 | ||
526 | hlist_del_rcu(&f->hlist); | |
6681712d | 527 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 528 | } |
529 | ||
f0b074be MR |
530 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
531 | __be32 *ip, __be16 *port, u32 *vni, u32 *ifindex) | |
d342894c | 532 | { |
6681712d | 533 | struct net *net = dev_net(vxlan->dev); |
d342894c | 534 | |
f0b074be MR |
535 | if (tb[NDA_DST]) { |
536 | if (nla_len(tb[NDA_DST]) != sizeof(__be32)) | |
537 | return -EAFNOSUPPORT; | |
d342894c | 538 | |
f0b074be MR |
539 | *ip = nla_get_be32(tb[NDA_DST]); |
540 | } else { | |
541 | *ip = htonl(INADDR_ANY); | |
542 | } | |
d342894c | 543 | |
6681712d | 544 | if (tb[NDA_PORT]) { |
73cf3317 | 545 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 546 | return -EINVAL; |
f0b074be MR |
547 | *port = nla_get_be16(tb[NDA_PORT]); |
548 | } else { | |
549 | *port = vxlan->dst_port; | |
550 | } | |
6681712d DS |
551 | |
552 | if (tb[NDA_VNI]) { | |
553 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
554 | return -EINVAL; | |
f0b074be MR |
555 | *vni = nla_get_u32(tb[NDA_VNI]); |
556 | } else { | |
557 | *vni = vxlan->default_dst.remote_vni; | |
558 | } | |
6681712d DS |
559 | |
560 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 561 | struct net_device *tdev; |
6681712d DS |
562 | |
563 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
564 | return -EINVAL; | |
f0b074be MR |
565 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
566 | tdev = dev_get_by_index(net, *ifindex); | |
5abb0029 | 567 | if (!tdev) |
6681712d | 568 | return -EADDRNOTAVAIL; |
5abb0029 | 569 | dev_put(tdev); |
f0b074be MR |
570 | } else { |
571 | *ifindex = 0; | |
572 | } | |
573 | ||
574 | return 0; | |
575 | } | |
576 | ||
577 | /* Add static entry (via netlink) */ | |
578 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
579 | struct net_device *dev, | |
580 | const unsigned char *addr, u16 flags) | |
581 | { | |
582 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
583 | /* struct net *net = dev_net(vxlan->dev); */ | |
584 | __be32 ip; | |
585 | __be16 port; | |
586 | u32 vni, ifindex; | |
587 | int err; | |
588 | ||
589 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
590 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
591 | ndm->ndm_state); | |
592 | return -EINVAL; | |
593 | } | |
594 | ||
595 | if (tb[NDA_DST] == NULL) | |
596 | return -EINVAL; | |
597 | ||
598 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
599 | if (err) | |
600 | return err; | |
6681712d | 601 | |
d342894c | 602 | spin_lock_bh(&vxlan->hash_lock); |
73cf3317 | 603 | err = vxlan_fdb_create(vxlan, addr, ip, ndm->ndm_state, flags, |
604 | port, vni, ifindex, ndm->ndm_flags); | |
d342894c | 605 | spin_unlock_bh(&vxlan->hash_lock); |
606 | ||
607 | return err; | |
608 | } | |
609 | ||
610 | /* Delete entry (via netlink) */ | |
1690be63 VY |
611 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
612 | struct net_device *dev, | |
d342894c | 613 | const unsigned char *addr) |
614 | { | |
615 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
616 | struct vxlan_fdb *f; | |
bc7892ba MR |
617 | struct vxlan_rdst *rd = NULL; |
618 | __be32 ip; | |
619 | __be16 port; | |
620 | u32 vni, ifindex; | |
621 | int err; | |
622 | ||
623 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
624 | if (err) | |
625 | return err; | |
626 | ||
627 | err = -ENOENT; | |
d342894c | 628 | |
629 | spin_lock_bh(&vxlan->hash_lock); | |
630 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
631 | if (!f) |
632 | goto out; | |
633 | ||
634 | if (ip != htonl(INADDR_ANY)) { | |
635 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
636 | if (!rd) | |
637 | goto out; | |
638 | } | |
639 | ||
640 | err = 0; | |
641 | ||
642 | /* remove a destination if it's not the only one on the list, | |
643 | * otherwise destroy the fdb entry | |
644 | */ | |
645 | if (rd && !list_is_singular(&f->remotes)) { | |
646 | list_del_rcu(&rd->list); | |
647 | call_rcu(&rd->rcu, vxlan_fdb_free_rdst); | |
648 | goto out; | |
d342894c | 649 | } |
bc7892ba MR |
650 | |
651 | vxlan_fdb_destroy(vxlan, f); | |
652 | ||
653 | out: | |
d342894c | 654 | spin_unlock_bh(&vxlan->hash_lock); |
655 | ||
656 | return err; | |
657 | } | |
658 | ||
659 | /* Dump forwarding table */ | |
660 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
661 | struct net_device *dev, int idx) | |
662 | { | |
663 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
664 | unsigned int h; | |
665 | ||
666 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
667 | struct vxlan_fdb *f; | |
d342894c | 668 | int err; |
669 | ||
b67bfe0d | 670 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 671 | struct vxlan_rdst *rd; |
6681712d | 672 | |
3e61aa8f SH |
673 | if (idx < cb->args[0]) |
674 | goto skip; | |
675 | ||
676 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
677 | err = vxlan_fdb_info(skb, vxlan, f, |
678 | NETLINK_CB(cb->skb).portid, | |
679 | cb->nlh->nlmsg_seq, | |
680 | RTM_NEWNEIGH, | |
681 | NLM_F_MULTI, rd); | |
682 | if (err < 0) | |
3e61aa8f | 683 | goto out; |
6681712d | 684 | } |
3e61aa8f SH |
685 | skip: |
686 | ++idx; | |
d342894c | 687 | } |
688 | } | |
3e61aa8f | 689 | out: |
d342894c | 690 | return idx; |
691 | } | |
692 | ||
693 | /* Watch incoming packets to learn mapping between Ethernet address | |
694 | * and Tunnel endpoint. | |
26a41ae6 | 695 | * Return true if packet is bogus and should be droppped. |
d342894c | 696 | */ |
26a41ae6 | 697 | static bool vxlan_snoop(struct net_device *dev, |
d342894c | 698 | __be32 src_ip, const u8 *src_mac) |
699 | { | |
700 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
701 | struct vxlan_fdb *f; | |
d342894c | 702 | |
703 | f = vxlan_find_mac(vxlan, src_mac); | |
704 | if (likely(f)) { | |
3e61aa8f SH |
705 | struct vxlan_rdst *rdst = first_remote(f); |
706 | ||
707 | if (likely(rdst->remote_ip == src_ip)) | |
26a41ae6 | 708 | return false; |
709 | ||
710 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 711 | if (f->state & NUD_NOARP) |
26a41ae6 | 712 | return true; |
d342894c | 713 | |
714 | if (net_ratelimit()) | |
715 | netdev_info(dev, | |
716 | "%pM migrated from %pI4 to %pI4\n", | |
3e61aa8f | 717 | src_mac, &rdst->remote_ip, &src_ip); |
d342894c | 718 | |
3e61aa8f | 719 | rdst->remote_ip = src_ip; |
d342894c | 720 | f->updated = jiffies; |
8385f50a | 721 | vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH); |
d342894c | 722 | } else { |
723 | /* learned new entry */ | |
724 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 725 | |
726 | /* close off race between vxlan_flush and incoming packets */ | |
727 | if (netif_running(dev)) | |
728 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
729 | NUD_REACHABLE, | |
730 | NLM_F_EXCL|NLM_F_CREATE, | |
731 | vxlan->dst_port, | |
732 | vxlan->default_dst.remote_vni, | |
733 | 0, NTF_SELF); | |
d342894c | 734 | spin_unlock(&vxlan->hash_lock); |
735 | } | |
26a41ae6 | 736 | |
737 | return false; | |
d342894c | 738 | } |
739 | ||
d342894c | 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 | ||
3fc2de2f | 773 | /* Callback to update multicast group membership when first VNI on |
774 | * multicast asddress is brought up | |
775 | * Done as workqueue because ip_mc_join_group acquires RTNL. | |
7c47cedf | 776 | */ |
3fc2de2f | 777 | static void vxlan_igmp_join(struct work_struct *work) |
d342894c | 778 | { |
3fc2de2f | 779 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_join); |
7c47cedf SH |
780 | struct vxlan_net *vn = net_generic(dev_net(vxlan->dev), vxlan_net_id); |
781 | struct vxlan_sock *vs = vxlan->vn_sock; | |
782 | struct sock *sk = vs->sock->sk; | |
d342894c | 783 | struct ip_mreqn mreq = { |
c7995c43 AW |
784 | .imr_multiaddr.s_addr = vxlan->default_dst.remote_ip, |
785 | .imr_ifindex = vxlan->default_dst.remote_ifindex, | |
d342894c | 786 | }; |
787 | ||
d342894c | 788 | lock_sock(sk); |
3fc2de2f | 789 | ip_mc_join_group(sk, &mreq); |
790 | release_sock(sk); | |
791 | ||
792 | vxlan_sock_release(vn, vs); | |
793 | dev_put(vxlan->dev); | |
794 | } | |
795 | ||
796 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
797 | static void vxlan_igmp_leave(struct work_struct *work) | |
798 | { | |
799 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_leave); | |
800 | struct vxlan_net *vn = net_generic(dev_net(vxlan->dev), vxlan_net_id); | |
801 | struct vxlan_sock *vs = vxlan->vn_sock; | |
802 | struct sock *sk = vs->sock->sk; | |
803 | struct ip_mreqn mreq = { | |
804 | .imr_multiaddr.s_addr = vxlan->default_dst.remote_ip, | |
805 | .imr_ifindex = vxlan->default_dst.remote_ifindex, | |
806 | }; | |
807 | ||
808 | lock_sock(sk); | |
809 | ip_mc_leave_group(sk, &mreq); | |
d342894c | 810 | release_sock(sk); |
d342894c | 811 | |
1c51a915 | 812 | vxlan_sock_release(vn, vs); |
7c47cedf | 813 | dev_put(vxlan->dev); |
d342894c | 814 | } |
815 | ||
816 | /* Callback from net/ipv4/udp.c to receive packets */ | |
817 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
818 | { | |
819 | struct iphdr *oip; | |
820 | struct vxlanhdr *vxh; | |
821 | struct vxlan_dev *vxlan; | |
e8171045 | 822 | struct pcpu_tstats *stats; |
553675fb | 823 | __be16 port; |
d342894c | 824 | __u32 vni; |
825 | int err; | |
826 | ||
827 | /* pop off outer UDP header */ | |
828 | __skb_pull(skb, sizeof(struct udphdr)); | |
829 | ||
830 | /* Need Vxlan and inner Ethernet header to be present */ | |
831 | if (!pskb_may_pull(skb, sizeof(struct vxlanhdr))) | |
832 | goto error; | |
833 | ||
834 | /* Drop packets with reserved bits set */ | |
835 | vxh = (struct vxlanhdr *) skb->data; | |
836 | if (vxh->vx_flags != htonl(VXLAN_FLAGS) || | |
837 | (vxh->vx_vni & htonl(0xff))) { | |
838 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
839 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
840 | goto error; | |
841 | } | |
842 | ||
843 | __skb_pull(skb, sizeof(struct vxlanhdr)); | |
d342894c | 844 | |
845 | /* Is this VNI defined? */ | |
846 | vni = ntohl(vxh->vx_vni) >> 8; | |
553675fb | 847 | port = inet_sk(sk)->inet_sport; |
848 | vxlan = vxlan_find_vni(sock_net(sk), vni, port); | |
d342894c | 849 | if (!vxlan) { |
553675fb | 850 | netdev_dbg(skb->dev, "unknown vni %d port %u\n", |
851 | vni, ntohs(port)); | |
d342894c | 852 | goto drop; |
853 | } | |
854 | ||
855 | if (!pskb_may_pull(skb, ETH_HLEN)) { | |
856 | vxlan->dev->stats.rx_length_errors++; | |
857 | vxlan->dev->stats.rx_errors++; | |
858 | goto drop; | |
859 | } | |
860 | ||
e4f67add DS |
861 | skb_reset_mac_header(skb); |
862 | ||
d342894c | 863 | /* Re-examine inner Ethernet packet */ |
864 | oip = ip_hdr(skb); | |
865 | skb->protocol = eth_type_trans(skb, vxlan->dev); | |
d342894c | 866 | |
867 | /* Ignore packet loops (and multicast echo) */ | |
868 | if (compare_ether_addr(eth_hdr(skb)->h_source, | |
869 | vxlan->dev->dev_addr) == 0) | |
870 | goto drop; | |
871 | ||
26a41ae6 | 872 | if ((vxlan->flags & VXLAN_F_LEARN) && |
873 | vxlan_snoop(skb->dev, oip->saddr, eth_hdr(skb)->h_source)) | |
874 | goto drop; | |
d342894c | 875 | |
876 | __skb_tunnel_rx(skb, vxlan->dev); | |
877 | skb_reset_network_header(skb); | |
0afb1666 JG |
878 | |
879 | /* If the NIC driver gave us an encapsulated packet with | |
880 | * CHECKSUM_UNNECESSARY and Rx checksum feature is enabled, | |
881 | * leave the CHECKSUM_UNNECESSARY, the device checksummed it | |
882 | * for us. Otherwise force the upper layers to verify it. | |
883 | */ | |
884 | if (skb->ip_summed != CHECKSUM_UNNECESSARY || !skb->encapsulation || | |
885 | !(vxlan->dev->features & NETIF_F_RXCSUM)) | |
886 | skb->ip_summed = CHECKSUM_NONE; | |
887 | ||
888 | skb->encapsulation = 0; | |
d342894c | 889 | |
890 | err = IP_ECN_decapsulate(oip, skb); | |
891 | if (unlikely(err)) { | |
892 | if (log_ecn_error) | |
893 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
894 | &oip->saddr, oip->tos); | |
895 | if (err > 1) { | |
896 | ++vxlan->dev->stats.rx_frame_errors; | |
897 | ++vxlan->dev->stats.rx_errors; | |
898 | goto drop; | |
899 | } | |
900 | } | |
901 | ||
e8171045 | 902 | stats = this_cpu_ptr(vxlan->dev->tstats); |
d342894c | 903 | u64_stats_update_begin(&stats->syncp); |
904 | stats->rx_packets++; | |
905 | stats->rx_bytes += skb->len; | |
906 | u64_stats_update_end(&stats->syncp); | |
907 | ||
908 | netif_rx(skb); | |
909 | ||
910 | return 0; | |
911 | error: | |
912 | /* Put UDP header back */ | |
913 | __skb_push(skb, sizeof(struct udphdr)); | |
914 | ||
915 | return 1; | |
916 | drop: | |
917 | /* Consume bad packet */ | |
918 | kfree_skb(skb); | |
919 | return 0; | |
920 | } | |
921 | ||
e4f67add DS |
922 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
923 | { | |
924 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
925 | struct arphdr *parp; | |
926 | u8 *arpptr, *sha; | |
927 | __be32 sip, tip; | |
928 | struct neighbour *n; | |
929 | ||
930 | if (dev->flags & IFF_NOARP) | |
931 | goto out; | |
932 | ||
933 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
934 | dev->stats.tx_dropped++; | |
935 | goto out; | |
936 | } | |
937 | parp = arp_hdr(skb); | |
938 | ||
939 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
940 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
941 | parp->ar_pro != htons(ETH_P_IP) || | |
942 | parp->ar_op != htons(ARPOP_REQUEST) || | |
943 | parp->ar_hln != dev->addr_len || | |
944 | parp->ar_pln != 4) | |
945 | goto out; | |
946 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
947 | sha = arpptr; | |
948 | arpptr += dev->addr_len; /* sha */ | |
949 | memcpy(&sip, arpptr, sizeof(sip)); | |
950 | arpptr += sizeof(sip); | |
951 | arpptr += dev->addr_len; /* tha */ | |
952 | memcpy(&tip, arpptr, sizeof(tip)); | |
953 | ||
954 | if (ipv4_is_loopback(tip) || | |
955 | ipv4_is_multicast(tip)) | |
956 | goto out; | |
957 | ||
958 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
959 | ||
960 | if (n) { | |
e4f67add DS |
961 | struct vxlan_fdb *f; |
962 | struct sk_buff *reply; | |
963 | ||
964 | if (!(n->nud_state & NUD_CONNECTED)) { | |
965 | neigh_release(n); | |
966 | goto out; | |
967 | } | |
968 | ||
969 | f = vxlan_find_mac(vxlan, n->ha); | |
3e61aa8f | 970 | if (f && first_remote(f)->remote_ip == htonl(INADDR_ANY)) { |
e4f67add DS |
971 | /* bridge-local neighbor */ |
972 | neigh_release(n); | |
973 | goto out; | |
974 | } | |
975 | ||
976 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
977 | n->ha, sha); | |
978 | ||
979 | neigh_release(n); | |
980 | ||
981 | skb_reset_mac_header(reply); | |
982 | __skb_pull(reply, skb_network_offset(reply)); | |
983 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
984 | reply->pkt_type = PACKET_HOST; | |
985 | ||
986 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
987 | dev->stats.rx_dropped++; | |
988 | } else if (vxlan->flags & VXLAN_F_L3MISS) | |
989 | vxlan_ip_miss(dev, tip); | |
990 | out: | |
991 | consume_skb(skb); | |
992 | return NETDEV_TX_OK; | |
993 | } | |
994 | ||
995 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) | |
996 | { | |
997 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
998 | struct neighbour *n; | |
999 | struct iphdr *pip; | |
1000 | ||
1001 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1002 | return false; | |
1003 | ||
1004 | n = NULL; | |
1005 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1006 | case ETH_P_IP: | |
1007 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) | |
1008 | return false; | |
1009 | pip = ip_hdr(skb); | |
1010 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
1011 | break; | |
1012 | default: | |
1013 | return false; | |
1014 | } | |
1015 | ||
1016 | if (n) { | |
1017 | bool diff; | |
1018 | ||
1019 | diff = compare_ether_addr(eth_hdr(skb)->h_dest, n->ha) != 0; | |
1020 | if (diff) { | |
1021 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1022 | dev->addr_len); | |
1023 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1024 | } | |
1025 | neigh_release(n); | |
1026 | return diff; | |
1027 | } else if (vxlan->flags & VXLAN_F_L3MISS) | |
1028 | vxlan_ip_miss(dev, pip->daddr); | |
1029 | return false; | |
1030 | } | |
1031 | ||
553675fb | 1032 | static void vxlan_sock_put(struct sk_buff *skb) |
1cad8715 | 1033 | { |
1034 | sock_put(skb->sk); | |
1035 | } | |
1036 | ||
1037 | /* On transmit, associate with the tunnel socket */ | |
1038 | static void vxlan_set_owner(struct net_device *dev, struct sk_buff *skb) | |
1039 | { | |
553675fb | 1040 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1041 | struct sock *sk = vxlan->vn_sock->sock->sk; | |
1cad8715 | 1042 | |
1043 | skb_orphan(skb); | |
1044 | sock_hold(sk); | |
1045 | skb->sk = sk; | |
553675fb | 1046 | skb->destructor = vxlan_sock_put; |
1cad8715 | 1047 | } |
1048 | ||
05f47d69 | 1049 | /* Compute source port for outgoing packet |
1050 | * first choice to use L4 flow hash since it will spread | |
1051 | * better and maybe available from hardware | |
1052 | * secondary choice is to use jhash on the Ethernet header | |
1053 | */ | |
7d836a76 | 1054 | static __be16 vxlan_src_port(const struct vxlan_dev *vxlan, struct sk_buff *skb) |
05f47d69 | 1055 | { |
1056 | unsigned int range = (vxlan->port_max - vxlan->port_min) + 1; | |
1057 | u32 hash; | |
1058 | ||
1059 | hash = skb_get_rxhash(skb); | |
1060 | if (!hash) | |
1061 | hash = jhash(skb->data, 2 * ETH_ALEN, | |
1062 | (__force u32) skb->protocol); | |
1063 | ||
7d836a76 | 1064 | return htons((((u64) hash * range) >> 32) + vxlan->port_min); |
05f47d69 | 1065 | } |
1066 | ||
05c0db08 PS |
1067 | static int handle_offloads(struct sk_buff *skb) |
1068 | { | |
1069 | if (skb_is_gso(skb)) { | |
1070 | int err = skb_unclone(skb, GFP_ATOMIC); | |
1071 | if (unlikely(err)) | |
1072 | return err; | |
1073 | ||
f6ace502 | 1074 | skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL; |
05c0db08 PS |
1075 | } else if (skb->ip_summed != CHECKSUM_PARTIAL) |
1076 | skb->ip_summed = CHECKSUM_NONE; | |
1077 | ||
1078 | return 0; | |
1079 | } | |
1080 | ||
9dcc71e1 SS |
1081 | /* Bypass encapsulation if the destination is local */ |
1082 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1083 | struct vxlan_dev *dst_vxlan) | |
1084 | { | |
1085 | struct pcpu_tstats *tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); | |
1086 | struct pcpu_tstats *rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
1087 | ||
1088 | skb->pkt_type = PACKET_HOST; | |
1089 | skb->encapsulation = 0; | |
1090 | skb->dev = dst_vxlan->dev; | |
1091 | __skb_pull(skb, skb_network_offset(skb)); | |
1092 | ||
1093 | if (dst_vxlan->flags & VXLAN_F_LEARN) | |
9d9f163c MR |
1094 | vxlan_snoop(skb->dev, htonl(INADDR_LOOPBACK), |
1095 | eth_hdr(skb)->h_source); | |
9dcc71e1 SS |
1096 | |
1097 | u64_stats_update_begin(&tx_stats->syncp); | |
1098 | tx_stats->tx_packets++; | |
1099 | tx_stats->tx_bytes += skb->len; | |
1100 | u64_stats_update_end(&tx_stats->syncp); | |
1101 | ||
1102 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1103 | u64_stats_update_begin(&rx_stats->syncp); | |
1104 | rx_stats->rx_packets++; | |
1105 | rx_stats->rx_bytes += skb->len; | |
1106 | u64_stats_update_end(&rx_stats->syncp); | |
1107 | } else { | |
1108 | skb->dev->stats.rx_dropped++; | |
1109 | } | |
1110 | } | |
1111 | ||
4ad16930 SH |
1112 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1113 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1114 | { |
1115 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1116 | struct rtable *rt; | |
d342894c | 1117 | const struct iphdr *old_iph; |
d342894c | 1118 | struct vxlanhdr *vxh; |
1119 | struct udphdr *uh; | |
1120 | struct flowi4 fl4; | |
d342894c | 1121 | __be32 dst; |
7d836a76 | 1122 | __be16 src_port, dst_port; |
234f5b73 | 1123 | u32 vni; |
d342894c | 1124 | __be16 df = 0; |
1125 | __u8 tos, ttl; | |
0e6fbc5b | 1126 | int err; |
d342894c | 1127 | |
823aa873 | 1128 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; |
6681712d DS |
1129 | vni = rdst->remote_vni; |
1130 | dst = rdst->remote_ip; | |
e4f67add DS |
1131 | |
1132 | if (!dst) { | |
1133 | if (did_rsc) { | |
e4f67add | 1134 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1135 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1136 | return; |
e4f67add | 1137 | } |
ef59febe | 1138 | goto drop; |
e4f67add | 1139 | } |
ef59febe | 1140 | |
d6727fe3 JG |
1141 | if (!skb->encapsulation) { |
1142 | skb_reset_inner_headers(skb); | |
1143 | skb->encapsulation = 1; | |
1144 | } | |
1145 | ||
d342894c | 1146 | /* Need space for new headers (invalidates iph ptr) */ |
1147 | if (skb_cow_head(skb, VXLAN_HEADROOM)) | |
1148 | goto drop; | |
1149 | ||
d342894c | 1150 | old_iph = ip_hdr(skb); |
1151 | ||
d342894c | 1152 | ttl = vxlan->ttl; |
1153 | if (!ttl && IN_MULTICAST(ntohl(dst))) | |
1154 | ttl = 1; | |
1155 | ||
1156 | tos = vxlan->tos; | |
1157 | if (tos == 1) | |
206aaafc | 1158 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1159 | |
05f47d69 | 1160 | src_port = vxlan_src_port(vxlan, skb); |
d342894c | 1161 | |
ca78f181 | 1162 | memset(&fl4, 0, sizeof(fl4)); |
6681712d | 1163 | fl4.flowi4_oif = rdst->remote_ifindex; |
ca78f181 | 1164 | fl4.flowi4_tos = RT_TOS(tos); |
1165 | fl4.daddr = dst; | |
1166 | fl4.saddr = vxlan->saddr; | |
1167 | ||
1168 | rt = ip_route_output_key(dev_net(dev), &fl4); | |
d342894c | 1169 | if (IS_ERR(rt)) { |
1170 | netdev_dbg(dev, "no route to %pI4\n", &dst); | |
1171 | dev->stats.tx_carrier_errors++; | |
1172 | goto tx_error; | |
1173 | } | |
1174 | ||
1175 | if (rt->dst.dev == dev) { | |
1176 | netdev_dbg(dev, "circular route to %pI4\n", &dst); | |
1177 | ip_rt_put(rt); | |
1178 | dev->stats.collisions++; | |
1179 | goto tx_error; | |
1180 | } | |
1181 | ||
9dcc71e1 | 1182 | /* Bypass encapsulation if the destination is local */ |
ab09a6d0 MR |
1183 | if (rt->rt_flags & RTCF_LOCAL && |
1184 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
9dcc71e1 SS |
1185 | struct vxlan_dev *dst_vxlan; |
1186 | ||
1187 | ip_rt_put(rt); | |
553675fb | 1188 | dst_vxlan = vxlan_find_vni(dev_net(dev), vni, dst_port); |
9dcc71e1 SS |
1189 | if (!dst_vxlan) |
1190 | goto tx_error; | |
1191 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
4ad16930 | 1192 | return; |
9dcc71e1 | 1193 | } |
d342894c | 1194 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
1195 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
6681712d | 1196 | vxh->vx_vni = htonl(vni << 8); |
d342894c | 1197 | |
1198 | __skb_push(skb, sizeof(*uh)); | |
1199 | skb_reset_transport_header(skb); | |
1200 | uh = udp_hdr(skb); | |
1201 | ||
73cf3317 | 1202 | uh->dest = dst_port; |
7d836a76 | 1203 | uh->source = src_port; |
d342894c | 1204 | |
1205 | uh->len = htons(skb->len); | |
1206 | uh->check = 0; | |
1207 | ||
1cad8715 | 1208 | vxlan_set_owner(dev, skb); |
1209 | ||
05c0db08 PS |
1210 | if (handle_offloads(skb)) |
1211 | goto drop; | |
d342894c | 1212 | |
0e6fbc5b PS |
1213 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
1214 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
1215 | ||
1216 | err = iptunnel_xmit(dev_net(dev), rt, skb, fl4.saddr, dst, | |
1217 | IPPROTO_UDP, tos, ttl, df); | |
1218 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
1219 | ||
4ad16930 | 1220 | return; |
d342894c | 1221 | |
1222 | drop: | |
1223 | dev->stats.tx_dropped++; | |
1224 | goto tx_free; | |
1225 | ||
1226 | tx_error: | |
1227 | dev->stats.tx_errors++; | |
1228 | tx_free: | |
1229 | dev_kfree_skb(skb); | |
d342894c | 1230 | } |
1231 | ||
6681712d DS |
1232 | /* Transmit local packets over Vxlan |
1233 | * | |
1234 | * Outer IP header inherits ECN and DF from inner header. | |
1235 | * Outer UDP destination is the VXLAN assigned port. | |
1236 | * source port is based on hash of flow | |
1237 | */ | |
1238 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
1239 | { | |
1240 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1241 | struct ethhdr *eth; | |
1242 | bool did_rsc = false; | |
afbd8bae | 1243 | struct vxlan_rdst *rdst; |
6681712d | 1244 | struct vxlan_fdb *f; |
6681712d DS |
1245 | |
1246 | skb_reset_mac_header(skb); | |
1247 | eth = eth_hdr(skb); | |
1248 | ||
1249 | if ((vxlan->flags & VXLAN_F_PROXY) && ntohs(eth->h_proto) == ETH_P_ARP) | |
1250 | return arp_reduce(dev, skb); | |
6681712d DS |
1251 | |
1252 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
ae884082 DS |
1253 | did_rsc = false; |
1254 | ||
1255 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
1256 | ntohs(eth->h_proto) == ETH_P_IP) { | |
1257 | did_rsc = route_shortcircuit(dev, skb); | |
1258 | if (did_rsc) | |
1259 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
1260 | } | |
1261 | ||
6681712d | 1262 | if (f == NULL) { |
afbd8bae MR |
1263 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
1264 | if (f == NULL) { | |
1265 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
1266 | !is_multicast_ether_addr(eth->h_dest)) | |
1267 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
1268 | ||
1269 | dev->stats.tx_dropped++; | |
1270 | dev_kfree_skb(skb); | |
1271 | return NETDEV_TX_OK; | |
1272 | } | |
1273 | } | |
6681712d | 1274 | |
afbd8bae MR |
1275 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
1276 | struct sk_buff *skb1; | |
6681712d | 1277 | |
afbd8bae MR |
1278 | skb1 = skb_clone(skb, GFP_ATOMIC); |
1279 | if (skb1) | |
1280 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
1281 | } |
1282 | ||
afbd8bae | 1283 | dev_kfree_skb(skb); |
4ad16930 | 1284 | return NETDEV_TX_OK; |
6681712d DS |
1285 | } |
1286 | ||
d342894c | 1287 | /* Walk the forwarding table and purge stale entries */ |
1288 | static void vxlan_cleanup(unsigned long arg) | |
1289 | { | |
1290 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
1291 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
1292 | unsigned int h; | |
1293 | ||
1294 | if (!netif_running(vxlan->dev)) | |
1295 | return; | |
1296 | ||
1297 | spin_lock_bh(&vxlan->hash_lock); | |
1298 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1299 | struct hlist_node *p, *n; | |
1300 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1301 | struct vxlan_fdb *f | |
1302 | = container_of(p, struct vxlan_fdb, hlist); | |
1303 | unsigned long timeout; | |
1304 | ||
3c172868 | 1305 | if (f->state & NUD_PERMANENT) |
d342894c | 1306 | continue; |
1307 | ||
1308 | timeout = f->used + vxlan->age_interval * HZ; | |
1309 | if (time_before_eq(timeout, jiffies)) { | |
1310 | netdev_dbg(vxlan->dev, | |
1311 | "garbage collect %pM\n", | |
1312 | f->eth_addr); | |
1313 | f->state = NUD_STALE; | |
1314 | vxlan_fdb_destroy(vxlan, f); | |
1315 | } else if (time_before(timeout, next_timer)) | |
1316 | next_timer = timeout; | |
1317 | } | |
1318 | } | |
1319 | spin_unlock_bh(&vxlan->hash_lock); | |
1320 | ||
1321 | mod_timer(&vxlan->age_timer, next_timer); | |
1322 | } | |
1323 | ||
1324 | /* Setup stats when device is created */ | |
1325 | static int vxlan_init(struct net_device *dev) | |
1326 | { | |
1c51a915 SH |
1327 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1328 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
1329 | struct vxlan_sock *vs; | |
1330 | __u32 vni = vxlan->default_dst.remote_vni; | |
1331 | ||
e8171045 PS |
1332 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
1333 | if (!dev->tstats) | |
d342894c | 1334 | return -ENOMEM; |
1335 | ||
1c51a915 SH |
1336 | spin_lock(&vn->sock_lock); |
1337 | vs = vxlan_find_port(dev_net(dev), vxlan->dst_port); | |
1338 | if (vs) { | |
1339 | /* If we have a socket with same port already, reuse it */ | |
1340 | atomic_inc(&vs->refcnt); | |
1341 | vxlan->vn_sock = vs; | |
1342 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); | |
1343 | } else { | |
1344 | /* otherwise make new socket outside of RTNL */ | |
1345 | dev_hold(dev); | |
1346 | queue_work(vxlan_wq, &vxlan->sock_work); | |
1347 | } | |
1348 | spin_unlock(&vn->sock_lock); | |
1349 | ||
d342894c | 1350 | return 0; |
1351 | } | |
1352 | ||
ba609e9b | 1353 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
1354 | { |
1355 | struct vxlan_fdb *f; | |
1356 | ||
1357 | spin_lock_bh(&vxlan->hash_lock); | |
1358 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
1359 | if (f) | |
1360 | vxlan_fdb_destroy(vxlan, f); | |
1361 | spin_unlock_bh(&vxlan->hash_lock); | |
1362 | } | |
1363 | ||
ebf4063e SH |
1364 | static void vxlan_uninit(struct net_device *dev) |
1365 | { | |
1366 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1367 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
1368 | struct vxlan_sock *vs = vxlan->vn_sock; | |
1369 | ||
ba609e9b | 1370 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 1371 | |
ebf4063e SH |
1372 | if (vs) |
1373 | vxlan_sock_release(vn, vs); | |
1374 | free_percpu(dev->tstats); | |
1375 | } | |
1376 | ||
d342894c | 1377 | /* Start ageing timer and join group when device is brought up */ |
1378 | static int vxlan_open(struct net_device *dev) | |
1379 | { | |
3fc2de2f | 1380 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 1381 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1c51a915 SH |
1382 | struct vxlan_sock *vs = vxlan->vn_sock; |
1383 | ||
1384 | /* socket hasn't been created */ | |
1385 | if (!vs) | |
1386 | return -ENOTCONN; | |
d342894c | 1387 | |
3fc2de2f | 1388 | if (IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip)) && |
614334df | 1389 | vxlan_group_used(vn, vxlan->default_dst.remote_ip)) { |
1c51a915 | 1390 | vxlan_sock_hold(vs); |
7c47cedf | 1391 | dev_hold(dev); |
3fc2de2f | 1392 | queue_work(vxlan_wq, &vxlan->igmp_join); |
d342894c | 1393 | } |
1394 | ||
1395 | if (vxlan->age_interval) | |
1396 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
1397 | ||
1398 | return 0; | |
1399 | } | |
1400 | ||
1401 | /* Purge the forwarding table */ | |
1402 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
1403 | { | |
31fec5aa | 1404 | unsigned int h; |
d342894c | 1405 | |
1406 | spin_lock_bh(&vxlan->hash_lock); | |
1407 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1408 | struct hlist_node *p, *n; | |
1409 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1410 | struct vxlan_fdb *f | |
1411 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
1412 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
1413 | if (!is_zero_ether_addr(f->eth_addr)) | |
1414 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 1415 | } |
1416 | } | |
1417 | spin_unlock_bh(&vxlan->hash_lock); | |
1418 | } | |
1419 | ||
1420 | /* Cleanup timer and forwarding table on shutdown */ | |
1421 | static int vxlan_stop(struct net_device *dev) | |
1422 | { | |
3fc2de2f | 1423 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 1424 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1c51a915 | 1425 | struct vxlan_sock *vs = vxlan->vn_sock; |
d342894c | 1426 | |
3fc2de2f | 1427 | if (vs && IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip)) && |
1428 | ! vxlan_group_used(vn, vxlan->default_dst.remote_ip)) { | |
1c51a915 | 1429 | vxlan_sock_hold(vs); |
7c47cedf | 1430 | dev_hold(dev); |
3fc2de2f | 1431 | queue_work(vxlan_wq, &vxlan->igmp_leave); |
7c47cedf | 1432 | } |
d342894c | 1433 | |
1434 | del_timer_sync(&vxlan->age_timer); | |
1435 | ||
1436 | vxlan_flush(vxlan); | |
1437 | ||
1438 | return 0; | |
1439 | } | |
1440 | ||
d342894c | 1441 | /* Stub, nothing needs to be done. */ |
1442 | static void vxlan_set_multicast_list(struct net_device *dev) | |
1443 | { | |
1444 | } | |
1445 | ||
1446 | static const struct net_device_ops vxlan_netdev_ops = { | |
1447 | .ndo_init = vxlan_init, | |
ebf4063e | 1448 | .ndo_uninit = vxlan_uninit, |
d342894c | 1449 | .ndo_open = vxlan_open, |
1450 | .ndo_stop = vxlan_stop, | |
1451 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 1452 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 1453 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
1454 | .ndo_change_mtu = eth_change_mtu, | |
1455 | .ndo_validate_addr = eth_validate_addr, | |
1456 | .ndo_set_mac_address = eth_mac_addr, | |
1457 | .ndo_fdb_add = vxlan_fdb_add, | |
1458 | .ndo_fdb_del = vxlan_fdb_delete, | |
1459 | .ndo_fdb_dump = vxlan_fdb_dump, | |
1460 | }; | |
1461 | ||
1462 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1463 | static struct device_type vxlan_type = { | |
1464 | .name = "vxlan", | |
1465 | }; | |
1466 | ||
d342894c | 1467 | /* Initialize the device structure. */ |
1468 | static void vxlan_setup(struct net_device *dev) | |
1469 | { | |
1470 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 1471 | unsigned int h; |
05f47d69 | 1472 | int low, high; |
d342894c | 1473 | |
1474 | eth_hw_addr_random(dev); | |
1475 | ether_setup(dev); | |
2840bf22 | 1476 | dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM; |
d342894c | 1477 | |
1478 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 1479 | dev->destructor = free_netdev; |
d342894c | 1480 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
1481 | ||
1482 | dev->tx_queue_len = 0; | |
1483 | dev->features |= NETIF_F_LLTX; | |
1484 | dev->features |= NETIF_F_NETNS_LOCAL; | |
d6727fe3 | 1485 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 1486 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 1487 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 JG |
1488 | |
1489 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; | |
05c0db08 | 1490 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
d342894c | 1491 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
6602d007 | 1492 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 1493 | |
553675fb | 1494 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 1495 | spin_lock_init(&vxlan->hash_lock); |
3fc2de2f | 1496 | INIT_WORK(&vxlan->igmp_join, vxlan_igmp_join); |
1497 | INIT_WORK(&vxlan->igmp_leave, vxlan_igmp_leave); | |
1c51a915 | 1498 | INIT_WORK(&vxlan->sock_work, vxlan_sock_work); |
d342894c | 1499 | |
1500 | init_timer_deferrable(&vxlan->age_timer); | |
1501 | vxlan->age_timer.function = vxlan_cleanup; | |
1502 | vxlan->age_timer.data = (unsigned long) vxlan; | |
1503 | ||
05f47d69 | 1504 | inet_get_local_port_range(&low, &high); |
1505 | vxlan->port_min = low; | |
1506 | vxlan->port_max = high; | |
823aa873 | 1507 | vxlan->dst_port = htons(vxlan_port); |
05f47d69 | 1508 | |
d342894c | 1509 | vxlan->dev = dev; |
1510 | ||
1511 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
1512 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
1513 | } | |
1514 | ||
1515 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
1516 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 1517 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
d342894c | 1518 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
1519 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
1520 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, | |
1521 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
1522 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
1523 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
1524 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 1525 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
1526 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
1527 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
1528 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
1529 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
823aa873 | 1530 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
d342894c | 1531 | }; |
1532 | ||
1533 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1534 | { | |
1535 | if (tb[IFLA_ADDRESS]) { | |
1536 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
1537 | pr_debug("invalid link address (not ethernet)\n"); | |
1538 | return -EINVAL; | |
1539 | } | |
1540 | ||
1541 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
1542 | pr_debug("invalid all zero ethernet address\n"); | |
1543 | return -EADDRNOTAVAIL; | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | if (!data) | |
1548 | return -EINVAL; | |
1549 | ||
1550 | if (data[IFLA_VXLAN_ID]) { | |
1551 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
1552 | if (id >= VXLAN_VID_MASK) | |
1553 | return -ERANGE; | |
1554 | } | |
1555 | ||
05f47d69 | 1556 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
1557 | const struct ifla_vxlan_port_range *p | |
1558 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
1559 | ||
1560 | if (ntohs(p->high) < ntohs(p->low)) { | |
1561 | pr_debug("port range %u .. %u not valid\n", | |
1562 | ntohs(p->low), ntohs(p->high)); | |
1563 | return -EINVAL; | |
1564 | } | |
1565 | } | |
1566 | ||
d342894c | 1567 | return 0; |
1568 | } | |
1569 | ||
1b13c97f YB |
1570 | static void vxlan_get_drvinfo(struct net_device *netdev, |
1571 | struct ethtool_drvinfo *drvinfo) | |
1572 | { | |
1573 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
1574 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
1575 | } | |
1576 | ||
1577 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
1578 | .get_drvinfo = vxlan_get_drvinfo, | |
1579 | .get_link = ethtool_op_get_link, | |
1580 | }; | |
1581 | ||
553675fb | 1582 | static void vxlan_del_work(struct work_struct *work) |
1583 | { | |
1584 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
1585 | ||
1586 | sk_release_kernel(vs->sock->sk); | |
1587 | kfree_rcu(vs, rcu); | |
1588 | } | |
1589 | ||
553675fb | 1590 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port) |
1591 | { | |
1592 | struct vxlan_sock *vs; | |
1593 | struct sock *sk; | |
1594 | struct sockaddr_in vxlan_addr = { | |
1595 | .sin_family = AF_INET, | |
1596 | .sin_addr.s_addr = htonl(INADDR_ANY), | |
bb3fd687 | 1597 | .sin_port = port, |
553675fb | 1598 | }; |
1599 | int rc; | |
31fec5aa | 1600 | unsigned int h; |
553675fb | 1601 | |
1602 | vs = kmalloc(sizeof(*vs), GFP_KERNEL); | |
1603 | if (!vs) | |
1604 | return ERR_PTR(-ENOMEM); | |
1605 | ||
1606 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
1607 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
1608 | ||
1609 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
1610 | ||
1611 | /* Create UDP socket for encapsulation receive. */ | |
1612 | rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &vs->sock); | |
1613 | if (rc < 0) { | |
1614 | pr_debug("UDP socket create failed\n"); | |
1615 | kfree(vs); | |
1616 | return ERR_PTR(rc); | |
1617 | } | |
1618 | ||
1619 | /* Put in proper namespace */ | |
1620 | sk = vs->sock->sk; | |
1621 | sk_change_net(sk, net); | |
1622 | ||
553675fb | 1623 | rc = kernel_bind(vs->sock, (struct sockaddr *) &vxlan_addr, |
1624 | sizeof(vxlan_addr)); | |
1625 | if (rc < 0) { | |
1626 | pr_debug("bind for UDP socket %pI4:%u (%d)\n", | |
1627 | &vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc); | |
1628 | sk_release_kernel(sk); | |
1629 | kfree(vs); | |
1630 | return ERR_PTR(rc); | |
1631 | } | |
1632 | ||
1633 | /* Disable multicast loopback */ | |
1634 | inet_sk(sk)->mc_loop = 0; | |
1635 | ||
1636 | /* Mark socket as an encapsulation socket. */ | |
1637 | udp_sk(sk)->encap_type = 1; | |
1638 | udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; | |
1639 | udp_encap_enable(); | |
7c47cedf | 1640 | atomic_set(&vs->refcnt, 1); |
553675fb | 1641 | |
553675fb | 1642 | return vs; |
1643 | } | |
1644 | ||
1c51a915 SH |
1645 | /* Scheduled at device creation to bind to a socket */ |
1646 | static void vxlan_sock_work(struct work_struct *work) | |
1647 | { | |
1648 | struct vxlan_dev *vxlan | |
1649 | = container_of(work, struct vxlan_dev, sock_work); | |
1650 | struct net_device *dev = vxlan->dev; | |
1651 | struct net *net = dev_net(dev); | |
1652 | __u32 vni = vxlan->default_dst.remote_vni; | |
1653 | __be16 port = vxlan->dst_port; | |
1654 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
1655 | struct vxlan_sock *nvs, *ovs; | |
1656 | ||
1657 | nvs = vxlan_socket_create(net, port); | |
1658 | if (IS_ERR(nvs)) { | |
1659 | netdev_err(vxlan->dev, "Can not create UDP socket, %ld\n", | |
1660 | PTR_ERR(nvs)); | |
1661 | goto out; | |
1662 | } | |
1663 | ||
1664 | spin_lock(&vn->sock_lock); | |
1665 | /* Look again to see if can reuse socket */ | |
1666 | ovs = vxlan_find_port(net, port); | |
1667 | if (ovs) { | |
1668 | atomic_inc(&ovs->refcnt); | |
1669 | vxlan->vn_sock = ovs; | |
1670 | hlist_add_head_rcu(&vxlan->hlist, vni_head(ovs, vni)); | |
1671 | spin_unlock(&vn->sock_lock); | |
1672 | ||
1673 | sk_release_kernel(nvs->sock->sk); | |
1674 | kfree(nvs); | |
1675 | } else { | |
1676 | vxlan->vn_sock = nvs; | |
1677 | hlist_add_head_rcu(&nvs->hlist, vs_head(net, port)); | |
1678 | hlist_add_head_rcu(&vxlan->hlist, vni_head(nvs, vni)); | |
1679 | spin_unlock(&vn->sock_lock); | |
1680 | } | |
1681 | out: | |
1682 | dev_put(dev); | |
1683 | } | |
1684 | ||
d342894c | 1685 | static int vxlan_newlink(struct net *net, struct net_device *dev, |
1686 | struct nlattr *tb[], struct nlattr *data[]) | |
1687 | { | |
553675fb | 1688 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
d342894c | 1689 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 1690 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 1691 | __u32 vni; |
1692 | int err; | |
1693 | ||
1694 | if (!data[IFLA_VXLAN_ID]) | |
1695 | return -EINVAL; | |
1696 | ||
1697 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); | |
c7995c43 | 1698 | dst->remote_vni = vni; |
d342894c | 1699 | |
5d174dd8 | 1700 | if (data[IFLA_VXLAN_GROUP]) |
1701 | dst->remote_ip = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
d342894c | 1702 | |
1703 | if (data[IFLA_VXLAN_LOCAL]) | |
1704 | vxlan->saddr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
1705 | ||
34e02aa1 | 1706 | if (data[IFLA_VXLAN_LINK] && |
c7995c43 | 1707 | (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { |
34e02aa1 | 1708 | struct net_device *lowerdev |
c7995c43 | 1709 | = __dev_get_by_index(net, dst->remote_ifindex); |
34e02aa1 | 1710 | |
1711 | if (!lowerdev) { | |
c7995c43 | 1712 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 1713 | return -ENODEV; |
1714 | } | |
d342894c | 1715 | |
34e02aa1 | 1716 | if (!tb[IFLA_MTU]) |
d342894c | 1717 | dev->mtu = lowerdev->mtu - VXLAN_HEADROOM; |
1ba56fb4 AD |
1718 | |
1719 | /* update header length based on lower device */ | |
1720 | dev->hard_header_len = lowerdev->hard_header_len + | |
1721 | VXLAN_HEADROOM; | |
d342894c | 1722 | } |
1723 | ||
1724 | if (data[IFLA_VXLAN_TOS]) | |
1725 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
1726 | ||
afb97186 VB |
1727 | if (data[IFLA_VXLAN_TTL]) |
1728 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
1729 | ||
d342894c | 1730 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 1731 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 1732 | |
1733 | if (data[IFLA_VXLAN_AGEING]) | |
1734 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
1735 | else | |
1736 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
1737 | ||
e4f67add DS |
1738 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
1739 | vxlan->flags |= VXLAN_F_PROXY; | |
1740 | ||
1741 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
1742 | vxlan->flags |= VXLAN_F_RSC; | |
1743 | ||
1744 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
1745 | vxlan->flags |= VXLAN_F_L2MISS; | |
1746 | ||
1747 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
1748 | vxlan->flags |= VXLAN_F_L3MISS; | |
1749 | ||
d342894c | 1750 | if (data[IFLA_VXLAN_LIMIT]) |
1751 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
1752 | ||
05f47d69 | 1753 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
1754 | const struct ifla_vxlan_port_range *p | |
1755 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
1756 | vxlan->port_min = ntohs(p->low); | |
1757 | vxlan->port_max = ntohs(p->high); | |
1758 | } | |
1759 | ||
823aa873 | 1760 | if (data[IFLA_VXLAN_PORT]) |
1761 | vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
1762 | ||
553675fb | 1763 | if (vxlan_find_vni(net, vni, vxlan->dst_port)) { |
1764 | pr_info("duplicate VNI %u\n", vni); | |
1765 | return -EEXIST; | |
1766 | } | |
1767 | ||
1b13c97f YB |
1768 | SET_ETHTOOL_OPS(dev, &vxlan_ethtool_ops); |
1769 | ||
afbd8bae MR |
1770 | /* create an fdb entry for default destination */ |
1771 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
1772 | vxlan->default_dst.remote_ip, | |
1773 | NUD_REACHABLE|NUD_PERMANENT, | |
1774 | NLM_F_EXCL|NLM_F_CREATE, | |
1775 | vxlan->dst_port, vxlan->default_dst.remote_vni, | |
1776 | vxlan->default_dst.remote_ifindex, NTF_SELF); | |
1c51a915 | 1777 | if (err) |
553675fb | 1778 | return err; |
d342894c | 1779 | |
afbd8bae MR |
1780 | err = register_netdevice(dev); |
1781 | if (err) { | |
ba609e9b | 1782 | vxlan_fdb_delete_default(vxlan); |
afbd8bae MR |
1783 | return err; |
1784 | } | |
1785 | ||
553675fb | 1786 | list_add(&vxlan->next, &vn->vxlan_list); |
553675fb | 1787 | |
1788 | return 0; | |
d342894c | 1789 | } |
1790 | ||
1791 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
1792 | { | |
fe5c3561 | 1793 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 1794 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1795 | ||
fe5c3561 | 1796 | spin_lock(&vn->sock_lock); |
d342894c | 1797 | hlist_del_rcu(&vxlan->hlist); |
fe5c3561 | 1798 | spin_unlock(&vn->sock_lock); |
1799 | ||
553675fb | 1800 | list_del(&vxlan->next); |
d342894c | 1801 | unregister_netdevice_queue(dev, head); |
1802 | } | |
1803 | ||
1804 | static size_t vxlan_get_size(const struct net_device *dev) | |
1805 | { | |
1806 | ||
1807 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
5d174dd8 | 1808 | nla_total_size(sizeof(__be32)) +/* IFLA_VXLAN_GROUP */ |
d342894c | 1809 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
1810 | nla_total_size(sizeof(__be32))+ /* IFLA_VXLAN_LOCAL */ | |
1811 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ | |
1812 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
1813 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
1814 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
1815 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
1816 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
1817 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 1818 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
1819 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 1820 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
823aa873 | 1821 | nla_total_size(sizeof(__be16))+ /* IFLA_VXLAN_PORT */ |
d342894c | 1822 | 0; |
1823 | } | |
1824 | ||
1825 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1826 | { | |
1827 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 1828 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 1829 | struct ifla_vxlan_port_range ports = { |
1830 | .low = htons(vxlan->port_min), | |
1831 | .high = htons(vxlan->port_max), | |
1832 | }; | |
d342894c | 1833 | |
c7995c43 | 1834 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 1835 | goto nla_put_failure; |
1836 | ||
5d174dd8 | 1837 | if (dst->remote_ip && nla_put_be32(skb, IFLA_VXLAN_GROUP, dst->remote_ip)) |
d342894c | 1838 | goto nla_put_failure; |
1839 | ||
c7995c43 | 1840 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 1841 | goto nla_put_failure; |
1842 | ||
7c41c42c | 1843 | if (vxlan->saddr && nla_put_be32(skb, IFLA_VXLAN_LOCAL, vxlan->saddr)) |
d342894c | 1844 | goto nla_put_failure; |
1845 | ||
1846 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
1847 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
1848 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
1849 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
1850 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
1851 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
1852 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
1853 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
1854 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
1855 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
1856 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 1857 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
823aa873 | 1858 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || |
1859 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port)) | |
d342894c | 1860 | goto nla_put_failure; |
1861 | ||
05f47d69 | 1862 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
1863 | goto nla_put_failure; | |
1864 | ||
d342894c | 1865 | return 0; |
1866 | ||
1867 | nla_put_failure: | |
1868 | return -EMSGSIZE; | |
1869 | } | |
1870 | ||
1871 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { | |
1872 | .kind = "vxlan", | |
1873 | .maxtype = IFLA_VXLAN_MAX, | |
1874 | .policy = vxlan_policy, | |
1875 | .priv_size = sizeof(struct vxlan_dev), | |
1876 | .setup = vxlan_setup, | |
1877 | .validate = vxlan_validate, | |
1878 | .newlink = vxlan_newlink, | |
1879 | .dellink = vxlan_dellink, | |
1880 | .get_size = vxlan_get_size, | |
1881 | .fill_info = vxlan_fill_info, | |
1882 | }; | |
1883 | ||
1884 | static __net_init int vxlan_init_net(struct net *net) | |
1885 | { | |
1886 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 1887 | unsigned int h; |
d342894c | 1888 | |
553675fb | 1889 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 1890 | spin_lock_init(&vn->sock_lock); |
d342894c | 1891 | |
553675fb | 1892 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
1893 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 1894 | |
1895 | return 0; | |
1896 | } | |
1897 | ||
1898 | static __net_exit void vxlan_exit_net(struct net *net) | |
1899 | { | |
1900 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
9cb6cb7e | 1901 | struct vxlan_dev *vxlan; |
372675a4 | 1902 | LIST_HEAD(list); |
9cb6cb7e ZM |
1903 | |
1904 | rtnl_lock(); | |
553675fb | 1905 | list_for_each_entry(vxlan, &vn->vxlan_list, next) |
372675a4 | 1906 | unregister_netdevice_queue(vxlan->dev, &list); |
1907 | unregister_netdevice_many(&list); | |
9cb6cb7e | 1908 | rtnl_unlock(); |
d342894c | 1909 | } |
1910 | ||
1911 | static struct pernet_operations vxlan_net_ops = { | |
1912 | .init = vxlan_init_net, | |
1913 | .exit = vxlan_exit_net, | |
1914 | .id = &vxlan_net_id, | |
1915 | .size = sizeof(struct vxlan_net), | |
1916 | }; | |
1917 | ||
1918 | static int __init vxlan_init_module(void) | |
1919 | { | |
1920 | int rc; | |
1921 | ||
758c57d1 SH |
1922 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
1923 | if (!vxlan_wq) | |
1924 | return -ENOMEM; | |
1925 | ||
d342894c | 1926 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
1927 | ||
1928 | rc = register_pernet_device(&vxlan_net_ops); | |
1929 | if (rc) | |
1930 | goto out1; | |
1931 | ||
1932 | rc = rtnl_link_register(&vxlan_link_ops); | |
1933 | if (rc) | |
1934 | goto out2; | |
1935 | ||
1936 | return 0; | |
1937 | ||
1938 | out2: | |
1939 | unregister_pernet_device(&vxlan_net_ops); | |
1940 | out1: | |
758c57d1 | 1941 | destroy_workqueue(vxlan_wq); |
d342894c | 1942 | return rc; |
1943 | } | |
7332a13b | 1944 | late_initcall(vxlan_init_module); |
d342894c | 1945 | |
1946 | static void __exit vxlan_cleanup_module(void) | |
1947 | { | |
b7153984 | 1948 | rtnl_link_unregister(&vxlan_link_ops); |
758c57d1 | 1949 | destroy_workqueue(vxlan_wq); |
f89e57c4 | 1950 | unregister_pernet_device(&vxlan_net_ops); |
6681712d | 1951 | rcu_barrier(); |
d342894c | 1952 | } |
1953 | module_exit(vxlan_cleanup_module); | |
1954 | ||
1955 | MODULE_LICENSE("GPL"); | |
1956 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 1957 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
d342894c | 1958 | MODULE_ALIAS_RTNL_LINK("vxlan"); |