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> | |
1eaa8178 | 30 | #include <linux/if_vlan.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> |
c5441932 | 36 | #include <net/ip_tunnels.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> | |
012a5729 | 45 | #include <net/vxlan.h> |
d342894c | 46 | |
47 | #define VXLAN_VERSION "0.1" | |
48 | ||
553675fb | 49 | #define PORT_HASH_BITS 8 |
50 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 51 | #define VNI_HASH_BITS 10 |
52 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
53 | #define FDB_HASH_BITS 8 | |
54 | #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) | |
55 | #define FDB_AGE_DEFAULT 300 /* 5 min */ | |
56 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
57 | ||
58 | #define VXLAN_N_VID (1u << 24) | |
59 | #define VXLAN_VID_MASK (VXLAN_N_VID - 1) | |
52b702ff AD |
60 | /* IP header + UDP + VXLAN + Ethernet header */ |
61 | #define VXLAN_HEADROOM (20 + 8 + 8 + 14) | |
7ce04758 | 62 | #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) |
d342894c | 63 | |
64 | #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */ | |
65 | ||
66 | /* VXLAN protocol header */ | |
67 | struct vxlanhdr { | |
68 | __be32 vx_flags; | |
69 | __be32 vx_vni; | |
70 | }; | |
71 | ||
23c578bf | 72 | /* UDP port for VXLAN traffic. |
73 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 74 | * for compatibility with early adopters. |
23c578bf | 75 | */ |
9daaa397 SH |
76 | static unsigned short vxlan_port __read_mostly = 8472; |
77 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 78 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
79 | ||
80 | static bool log_ecn_error = true; | |
81 | module_param(log_ecn_error, bool, 0644); | |
82 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
83 | ||
60d9d4c6 | 84 | static int vxlan_net_id; |
553675fb | 85 | |
afbd8bae MR |
86 | static const u8 all_zeros_mac[ETH_ALEN]; |
87 | ||
553675fb | 88 | /* per-network namespace private data for this module */ |
89 | struct vxlan_net { | |
90 | struct list_head vxlan_list; | |
91 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 92 | spinlock_t sock_lock; |
553675fb | 93 | }; |
94 | ||
6681712d | 95 | struct vxlan_rdst { |
6681712d DS |
96 | __be32 remote_ip; |
97 | __be16 remote_port; | |
98 | u32 remote_vni; | |
99 | u32 remote_ifindex; | |
3e61aa8f | 100 | struct list_head list; |
bc7892ba | 101 | struct rcu_head rcu; |
6681712d DS |
102 | }; |
103 | ||
d342894c | 104 | /* Forwarding table entry */ |
105 | struct vxlan_fdb { | |
106 | struct hlist_node hlist; /* linked list of entries */ | |
107 | struct rcu_head rcu; | |
108 | unsigned long updated; /* jiffies */ | |
109 | unsigned long used; | |
3e61aa8f | 110 | struct list_head remotes; |
d342894c | 111 | u16 state; /* see ndm_state */ |
ae884082 | 112 | u8 flags; /* see ndm_flags */ |
d342894c | 113 | u8 eth_addr[ETH_ALEN]; |
114 | }; | |
115 | ||
d342894c | 116 | /* Pseudo network device */ |
117 | struct vxlan_dev { | |
553675fb | 118 | struct hlist_node hlist; /* vni hash table */ |
119 | struct list_head next; /* vxlan's per namespace list */ | |
120 | struct vxlan_sock *vn_sock; /* listening socket */ | |
d342894c | 121 | struct net_device *dev; |
c7995c43 | 122 | struct vxlan_rdst default_dst; /* default destination */ |
d342894c | 123 | __be32 saddr; /* source address */ |
823aa873 | 124 | __be16 dst_port; |
05f47d69 | 125 | __u16 port_min; /* source port range */ |
126 | __u16 port_max; | |
d342894c | 127 | __u8 tos; /* TOS override */ |
128 | __u8 ttl; | |
e4f67add | 129 | u32 flags; /* VXLAN_F_* below */ |
d342894c | 130 | |
1c51a915 | 131 | struct work_struct sock_work; |
3fc2de2f | 132 | struct work_struct igmp_join; |
133 | struct work_struct igmp_leave; | |
1c51a915 | 134 | |
d342894c | 135 | unsigned long age_interval; |
136 | struct timer_list age_timer; | |
137 | spinlock_t hash_lock; | |
138 | unsigned int addrcnt; | |
139 | unsigned int addrmax; | |
d342894c | 140 | |
141 | struct hlist_head fdb_head[FDB_HASH_SIZE]; | |
142 | }; | |
143 | ||
e4f67add DS |
144 | #define VXLAN_F_LEARN 0x01 |
145 | #define VXLAN_F_PROXY 0x02 | |
146 | #define VXLAN_F_RSC 0x04 | |
147 | #define VXLAN_F_L2MISS 0x08 | |
148 | #define VXLAN_F_L3MISS 0x10 | |
149 | ||
d342894c | 150 | /* salt for hash table */ |
151 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 152 | static struct workqueue_struct *vxlan_wq; |
d342894c | 153 | |
1c51a915 SH |
154 | static void vxlan_sock_work(struct work_struct *work); |
155 | ||
553675fb | 156 | /* Virtual Network hash table head */ |
157 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
158 | { | |
159 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
160 | } | |
161 | ||
162 | /* Socket hash table head */ | |
163 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 164 | { |
165 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
166 | ||
553675fb | 167 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
168 | } | |
169 | ||
3e61aa8f SH |
170 | /* First remote destination for a forwarding entry. |
171 | * Guaranteed to be non-NULL because remotes are never deleted. | |
172 | */ | |
5ca5461c | 173 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 174 | { |
5ca5461c | 175 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
176 | } | |
177 | ||
178 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
179 | { | |
180 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
181 | } |
182 | ||
553675fb | 183 | /* Find VXLAN socket based on network namespace and UDP port */ |
9c2e24e1 | 184 | static struct vxlan_sock *vxlan_find_sock(struct net *net, __be16 port) |
553675fb | 185 | { |
186 | struct vxlan_sock *vs; | |
187 | ||
188 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
189 | if (inet_sk(vs->sock->sk)->inet_sport == port) | |
190 | return vs; | |
191 | } | |
192 | return NULL; | |
d342894c | 193 | } |
194 | ||
5cfccc5a | 195 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id) |
d342894c | 196 | { |
197 | struct vxlan_dev *vxlan; | |
d342894c | 198 | |
553675fb | 199 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { |
c7995c43 | 200 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 201 | return vxlan; |
202 | } | |
203 | ||
204 | return NULL; | |
205 | } | |
206 | ||
5cfccc5a PS |
207 | /* Look up VNI in a per net namespace table */ |
208 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, __be16 port) | |
209 | { | |
210 | struct vxlan_sock *vs; | |
211 | ||
212 | vs = vxlan_find_sock(net, port); | |
213 | if (!vs) | |
214 | return NULL; | |
215 | ||
216 | return vxlan_vs_find_vni(vs, id); | |
217 | } | |
218 | ||
d342894c | 219 | /* Fill in neighbour message in skbuff. */ |
220 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
221 | const struct vxlan_fdb *fdb, |
222 | u32 portid, u32 seq, int type, unsigned int flags, | |
223 | const struct vxlan_rdst *rdst) | |
d342894c | 224 | { |
225 | unsigned long now = jiffies; | |
226 | struct nda_cacheinfo ci; | |
227 | struct nlmsghdr *nlh; | |
228 | struct ndmsg *ndm; | |
e4f67add | 229 | bool send_ip, send_eth; |
d342894c | 230 | |
231 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
232 | if (nlh == NULL) | |
233 | return -EMSGSIZE; | |
234 | ||
235 | ndm = nlmsg_data(nlh); | |
236 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
237 | |
238 | send_eth = send_ip = true; | |
239 | ||
240 | if (type == RTM_GETNEIGH) { | |
241 | ndm->ndm_family = AF_INET; | |
6681712d | 242 | send_ip = rdst->remote_ip != htonl(INADDR_ANY); |
e4f67add DS |
243 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
244 | } else | |
245 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 246 | ndm->ndm_state = fdb->state; |
247 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 248 | ndm->ndm_flags = fdb->flags; |
d342894c | 249 | ndm->ndm_type = NDA_DST; |
250 | ||
e4f67add | 251 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 252 | goto nla_put_failure; |
253 | ||
6681712d DS |
254 | if (send_ip && nla_put_be32(skb, NDA_DST, rdst->remote_ip)) |
255 | goto nla_put_failure; | |
256 | ||
823aa873 | 257 | if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && |
6681712d DS |
258 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
259 | goto nla_put_failure; | |
c7995c43 | 260 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 261 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
262 | goto nla_put_failure; |
263 | if (rdst->remote_ifindex && | |
264 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 265 | goto nla_put_failure; |
266 | ||
267 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
268 | ci.ndm_confirmed = 0; | |
269 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
270 | ci.ndm_refcnt = 0; | |
271 | ||
272 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
273 | goto nla_put_failure; | |
274 | ||
275 | return nlmsg_end(skb, nlh); | |
276 | ||
277 | nla_put_failure: | |
278 | nlmsg_cancel(skb, nlh); | |
279 | return -EMSGSIZE; | |
280 | } | |
281 | ||
282 | static inline size_t vxlan_nlmsg_size(void) | |
283 | { | |
284 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
285 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
286 | + nla_total_size(sizeof(__be32)) /* NDA_DST */ | |
73cf3317 | 287 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
288 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
289 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
d342894c | 290 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
291 | } | |
292 | ||
293 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, | |
3e61aa8f | 294 | struct vxlan_fdb *fdb, int type) |
d342894c | 295 | { |
296 | struct net *net = dev_net(vxlan->dev); | |
297 | struct sk_buff *skb; | |
298 | int err = -ENOBUFS; | |
299 | ||
300 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
301 | if (skb == NULL) | |
302 | goto errout; | |
303 | ||
5ca5461c | 304 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, |
305 | first_remote_rtnl(fdb)); | |
d342894c | 306 | if (err < 0) { |
307 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
308 | WARN_ON(err == -EMSGSIZE); | |
309 | kfree_skb(skb); | |
310 | goto errout; | |
311 | } | |
312 | ||
313 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
314 | return; | |
315 | errout: | |
316 | if (err < 0) | |
317 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
318 | } | |
319 | ||
e4f67add DS |
320 | static void vxlan_ip_miss(struct net_device *dev, __be32 ipa) |
321 | { | |
322 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
323 | struct vxlan_fdb f = { |
324 | .state = NUD_STALE, | |
325 | }; | |
326 | struct vxlan_rdst remote = { | |
327 | .remote_ip = ipa, /* goes to NDA_DST */ | |
328 | .remote_vni = VXLAN_N_VID, | |
329 | }; | |
3e61aa8f SH |
330 | |
331 | INIT_LIST_HEAD(&f.remotes); | |
332 | list_add_rcu(&remote.list, &f.remotes); | |
e4f67add DS |
333 | |
334 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
335 | } | |
336 | ||
337 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
338 | { | |
bb3fd687 SH |
339 | struct vxlan_fdb f = { |
340 | .state = NUD_STALE, | |
341 | }; | |
e4f67add | 342 | |
3e61aa8f | 343 | INIT_LIST_HEAD(&f.remotes); |
e4f67add DS |
344 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
345 | ||
346 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
347 | } | |
348 | ||
d342894c | 349 | /* Hash Ethernet address */ |
350 | static u32 eth_hash(const unsigned char *addr) | |
351 | { | |
352 | u64 value = get_unaligned((u64 *)addr); | |
353 | ||
354 | /* only want 6 bytes */ | |
355 | #ifdef __BIG_ENDIAN | |
d342894c | 356 | value >>= 16; |
321fb991 | 357 | #else |
358 | value <<= 16; | |
d342894c | 359 | #endif |
360 | return hash_64(value, FDB_HASH_BITS); | |
361 | } | |
362 | ||
363 | /* Hash chain to use given mac address */ | |
364 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
365 | const u8 *mac) | |
366 | { | |
367 | return &vxlan->fdb_head[eth_hash(mac)]; | |
368 | } | |
369 | ||
370 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 371 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 372 | const u8 *mac) |
373 | ||
374 | { | |
375 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
376 | struct vxlan_fdb *f; | |
d342894c | 377 | |
b67bfe0d | 378 | hlist_for_each_entry_rcu(f, head, hlist) { |
d342894c | 379 | if (compare_ether_addr(mac, f->eth_addr) == 0) |
380 | return f; | |
381 | } | |
382 | ||
383 | return NULL; | |
384 | } | |
385 | ||
014be2c8 SS |
386 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
387 | const u8 *mac) | |
388 | { | |
389 | struct vxlan_fdb *f; | |
390 | ||
391 | f = __vxlan_find_mac(vxlan, mac); | |
392 | if (f) | |
393 | f->used = jiffies; | |
394 | ||
395 | return f; | |
396 | } | |
397 | ||
a5e7c10a MR |
398 | /* caller should hold vxlan->hash_lock */ |
399 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
400 | __be32 ip, __be16 port, | |
401 | __u32 vni, __u32 ifindex) | |
6681712d | 402 | { |
3e61aa8f | 403 | struct vxlan_rdst *rd; |
6681712d | 404 | |
3e61aa8f | 405 | list_for_each_entry(rd, &f->remotes, list) { |
6681712d DS |
406 | if (rd->remote_ip == ip && |
407 | rd->remote_port == port && | |
408 | rd->remote_vni == vni && | |
409 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 410 | return rd; |
6681712d | 411 | } |
3e61aa8f | 412 | |
a5e7c10a MR |
413 | return NULL; |
414 | } | |
415 | ||
906dc186 TR |
416 | /* Replace destination of unicast mac */ |
417 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
418 | __be32 ip, __be16 port, __u32 vni, __u32 ifindex) | |
419 | { | |
420 | struct vxlan_rdst *rd; | |
421 | ||
422 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
423 | if (rd) | |
424 | return 0; | |
425 | ||
426 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
427 | if (!rd) | |
428 | return 0; | |
429 | rd->remote_ip = ip; | |
430 | rd->remote_port = port; | |
431 | rd->remote_vni = vni; | |
432 | rd->remote_ifindex = ifindex; | |
433 | return 1; | |
434 | } | |
435 | ||
a5e7c10a MR |
436 | /* Add/update destinations for multicast */ |
437 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
438 | __be32 ip, __be16 port, __u32 vni, __u32 ifindex) | |
439 | { | |
440 | struct vxlan_rdst *rd; | |
441 | ||
442 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
443 | if (rd) | |
444 | return 0; | |
445 | ||
6681712d DS |
446 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
447 | if (rd == NULL) | |
448 | return -ENOBUFS; | |
449 | rd->remote_ip = ip; | |
450 | rd->remote_port = port; | |
451 | rd->remote_vni = vni; | |
452 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
453 | |
454 | list_add_tail_rcu(&rd->list, &f->remotes); | |
455 | ||
6681712d DS |
456 | return 1; |
457 | } | |
458 | ||
d342894c | 459 | /* Add new entry to forwarding table -- assumes lock held */ |
460 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
461 | const u8 *mac, __be32 ip, | |
6681712d | 462 | __u16 state, __u16 flags, |
73cf3317 | 463 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 464 | __u8 ndm_flags) |
d342894c | 465 | { |
466 | struct vxlan_fdb *f; | |
467 | int notify = 0; | |
468 | ||
014be2c8 | 469 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 470 | if (f) { |
471 | if (flags & NLM_F_EXCL) { | |
472 | netdev_dbg(vxlan->dev, | |
473 | "lost race to create %pM\n", mac); | |
474 | return -EEXIST; | |
475 | } | |
476 | if (f->state != state) { | |
477 | f->state = state; | |
478 | f->updated = jiffies; | |
479 | notify = 1; | |
480 | } | |
ae884082 DS |
481 | if (f->flags != ndm_flags) { |
482 | f->flags = ndm_flags; | |
483 | f->updated = jiffies; | |
484 | notify = 1; | |
485 | } | |
906dc186 TR |
486 | if ((flags & NLM_F_REPLACE)) { |
487 | /* Only change unicasts */ | |
488 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
489 | is_zero_ether_addr(f->eth_addr))) { | |
490 | int rc = vxlan_fdb_replace(f, ip, port, vni, | |
491 | ifindex); | |
492 | ||
493 | if (rc < 0) | |
494 | return rc; | |
495 | notify |= rc; | |
496 | } else | |
497 | return -EOPNOTSUPP; | |
498 | } | |
6681712d | 499 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
500 | (is_multicast_ether_addr(f->eth_addr) || |
501 | is_zero_ether_addr(f->eth_addr))) { | |
6681712d DS |
502 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex); |
503 | ||
504 | if (rc < 0) | |
505 | return rc; | |
506 | notify |= rc; | |
507 | } | |
d342894c | 508 | } else { |
509 | if (!(flags & NLM_F_CREATE)) | |
510 | return -ENOENT; | |
511 | ||
512 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
513 | return -ENOSPC; | |
514 | ||
906dc186 TR |
515 | /* Disallow replace to add a multicast entry */ |
516 | if ((flags & NLM_F_REPLACE) && | |
517 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
518 | return -EOPNOTSUPP; | |
519 | ||
d342894c | 520 | netdev_dbg(vxlan->dev, "add %pM -> %pI4\n", mac, &ip); |
521 | f = kmalloc(sizeof(*f), GFP_ATOMIC); | |
522 | if (!f) | |
523 | return -ENOMEM; | |
524 | ||
525 | notify = 1; | |
d342894c | 526 | f->state = state; |
ae884082 | 527 | f->flags = ndm_flags; |
d342894c | 528 | f->updated = f->used = jiffies; |
3e61aa8f | 529 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 530 | memcpy(f->eth_addr, mac, ETH_ALEN); |
531 | ||
3e61aa8f SH |
532 | vxlan_fdb_append(f, ip, port, vni, ifindex); |
533 | ||
d342894c | 534 | ++vxlan->addrcnt; |
535 | hlist_add_head_rcu(&f->hlist, | |
536 | vxlan_fdb_head(vxlan, mac)); | |
537 | } | |
538 | ||
539 | if (notify) | |
540 | vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH); | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
bc7892ba MR |
545 | static void vxlan_fdb_free_rdst(struct rcu_head *head) |
546 | { | |
547 | struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); | |
548 | kfree(rd); | |
549 | } | |
550 | ||
6706c82e | 551 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
552 | { |
553 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 554 | struct vxlan_rdst *rd, *nd; |
6681712d | 555 | |
3e61aa8f | 556 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 557 | kfree(rd); |
6681712d DS |
558 | kfree(f); |
559 | } | |
560 | ||
d342894c | 561 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
562 | { | |
563 | netdev_dbg(vxlan->dev, | |
564 | "delete %pM\n", f->eth_addr); | |
565 | ||
566 | --vxlan->addrcnt; | |
567 | vxlan_fdb_notify(vxlan, f, RTM_DELNEIGH); | |
568 | ||
569 | hlist_del_rcu(&f->hlist); | |
6681712d | 570 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 571 | } |
572 | ||
f0b074be MR |
573 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
574 | __be32 *ip, __be16 *port, u32 *vni, u32 *ifindex) | |
d342894c | 575 | { |
6681712d | 576 | struct net *net = dev_net(vxlan->dev); |
d342894c | 577 | |
f0b074be MR |
578 | if (tb[NDA_DST]) { |
579 | if (nla_len(tb[NDA_DST]) != sizeof(__be32)) | |
580 | return -EAFNOSUPPORT; | |
d342894c | 581 | |
f0b074be MR |
582 | *ip = nla_get_be32(tb[NDA_DST]); |
583 | } else { | |
584 | *ip = htonl(INADDR_ANY); | |
585 | } | |
d342894c | 586 | |
6681712d | 587 | if (tb[NDA_PORT]) { |
73cf3317 | 588 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 589 | return -EINVAL; |
f0b074be MR |
590 | *port = nla_get_be16(tb[NDA_PORT]); |
591 | } else { | |
592 | *port = vxlan->dst_port; | |
593 | } | |
6681712d DS |
594 | |
595 | if (tb[NDA_VNI]) { | |
596 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
597 | return -EINVAL; | |
f0b074be MR |
598 | *vni = nla_get_u32(tb[NDA_VNI]); |
599 | } else { | |
600 | *vni = vxlan->default_dst.remote_vni; | |
601 | } | |
6681712d DS |
602 | |
603 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 604 | struct net_device *tdev; |
6681712d DS |
605 | |
606 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
607 | return -EINVAL; | |
f0b074be MR |
608 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
609 | tdev = dev_get_by_index(net, *ifindex); | |
5abb0029 | 610 | if (!tdev) |
6681712d | 611 | return -EADDRNOTAVAIL; |
5abb0029 | 612 | dev_put(tdev); |
f0b074be MR |
613 | } else { |
614 | *ifindex = 0; | |
615 | } | |
616 | ||
617 | return 0; | |
618 | } | |
619 | ||
620 | /* Add static entry (via netlink) */ | |
621 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
622 | struct net_device *dev, | |
623 | const unsigned char *addr, u16 flags) | |
624 | { | |
625 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
626 | /* struct net *net = dev_net(vxlan->dev); */ | |
627 | __be32 ip; | |
628 | __be16 port; | |
629 | u32 vni, ifindex; | |
630 | int err; | |
631 | ||
632 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
633 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
634 | ndm->ndm_state); | |
635 | return -EINVAL; | |
636 | } | |
637 | ||
638 | if (tb[NDA_DST] == NULL) | |
639 | return -EINVAL; | |
640 | ||
641 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
642 | if (err) | |
643 | return err; | |
6681712d | 644 | |
d342894c | 645 | spin_lock_bh(&vxlan->hash_lock); |
73cf3317 | 646 | err = vxlan_fdb_create(vxlan, addr, ip, ndm->ndm_state, flags, |
647 | port, vni, ifindex, ndm->ndm_flags); | |
d342894c | 648 | spin_unlock_bh(&vxlan->hash_lock); |
649 | ||
650 | return err; | |
651 | } | |
652 | ||
653 | /* Delete entry (via netlink) */ | |
1690be63 VY |
654 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
655 | struct net_device *dev, | |
d342894c | 656 | const unsigned char *addr) |
657 | { | |
658 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
659 | struct vxlan_fdb *f; | |
bc7892ba MR |
660 | struct vxlan_rdst *rd = NULL; |
661 | __be32 ip; | |
662 | __be16 port; | |
663 | u32 vni, ifindex; | |
664 | int err; | |
665 | ||
666 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
667 | if (err) | |
668 | return err; | |
669 | ||
670 | err = -ENOENT; | |
d342894c | 671 | |
672 | spin_lock_bh(&vxlan->hash_lock); | |
673 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
674 | if (!f) |
675 | goto out; | |
676 | ||
677 | if (ip != htonl(INADDR_ANY)) { | |
678 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
679 | if (!rd) | |
680 | goto out; | |
681 | } | |
682 | ||
683 | err = 0; | |
684 | ||
685 | /* remove a destination if it's not the only one on the list, | |
686 | * otherwise destroy the fdb entry | |
687 | */ | |
688 | if (rd && !list_is_singular(&f->remotes)) { | |
689 | list_del_rcu(&rd->list); | |
690 | call_rcu(&rd->rcu, vxlan_fdb_free_rdst); | |
691 | goto out; | |
d342894c | 692 | } |
bc7892ba MR |
693 | |
694 | vxlan_fdb_destroy(vxlan, f); | |
695 | ||
696 | out: | |
d342894c | 697 | spin_unlock_bh(&vxlan->hash_lock); |
698 | ||
699 | return err; | |
700 | } | |
701 | ||
702 | /* Dump forwarding table */ | |
703 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
704 | struct net_device *dev, int idx) | |
705 | { | |
706 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
707 | unsigned int h; | |
708 | ||
709 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
710 | struct vxlan_fdb *f; | |
d342894c | 711 | int err; |
712 | ||
b67bfe0d | 713 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 714 | struct vxlan_rdst *rd; |
6681712d | 715 | |
3e61aa8f SH |
716 | if (idx < cb->args[0]) |
717 | goto skip; | |
718 | ||
719 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
720 | err = vxlan_fdb_info(skb, vxlan, f, |
721 | NETLINK_CB(cb->skb).portid, | |
722 | cb->nlh->nlmsg_seq, | |
723 | RTM_NEWNEIGH, | |
724 | NLM_F_MULTI, rd); | |
725 | if (err < 0) | |
3e61aa8f | 726 | goto out; |
6681712d | 727 | } |
3e61aa8f SH |
728 | skip: |
729 | ++idx; | |
d342894c | 730 | } |
731 | } | |
3e61aa8f | 732 | out: |
d342894c | 733 | return idx; |
734 | } | |
735 | ||
736 | /* Watch incoming packets to learn mapping between Ethernet address | |
737 | * and Tunnel endpoint. | |
26a41ae6 | 738 | * Return true if packet is bogus and should be droppped. |
d342894c | 739 | */ |
26a41ae6 | 740 | static bool vxlan_snoop(struct net_device *dev, |
d342894c | 741 | __be32 src_ip, const u8 *src_mac) |
742 | { | |
743 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
744 | struct vxlan_fdb *f; | |
d342894c | 745 | |
746 | f = vxlan_find_mac(vxlan, src_mac); | |
747 | if (likely(f)) { | |
5ca5461c | 748 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f SH |
749 | |
750 | if (likely(rdst->remote_ip == src_ip)) | |
26a41ae6 | 751 | return false; |
752 | ||
753 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 754 | if (f->state & NUD_NOARP) |
26a41ae6 | 755 | return true; |
d342894c | 756 | |
757 | if (net_ratelimit()) | |
758 | netdev_info(dev, | |
759 | "%pM migrated from %pI4 to %pI4\n", | |
3e61aa8f | 760 | src_mac, &rdst->remote_ip, &src_ip); |
d342894c | 761 | |
3e61aa8f | 762 | rdst->remote_ip = src_ip; |
d342894c | 763 | f->updated = jiffies; |
8385f50a | 764 | vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH); |
d342894c | 765 | } else { |
766 | /* learned new entry */ | |
767 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 768 | |
769 | /* close off race between vxlan_flush and incoming packets */ | |
770 | if (netif_running(dev)) | |
771 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
772 | NUD_REACHABLE, | |
773 | NLM_F_EXCL|NLM_F_CREATE, | |
774 | vxlan->dst_port, | |
775 | vxlan->default_dst.remote_vni, | |
776 | 0, NTF_SELF); | |
d342894c | 777 | spin_unlock(&vxlan->hash_lock); |
778 | } | |
26a41ae6 | 779 | |
780 | return false; | |
d342894c | 781 | } |
782 | ||
d342894c | 783 | /* See if multicast group is already in use by other ID */ |
7c47cedf | 784 | static bool vxlan_group_used(struct vxlan_net *vn, __be32 remote_ip) |
d342894c | 785 | { |
553675fb | 786 | struct vxlan_dev *vxlan; |
d342894c | 787 | |
553675fb | 788 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
553675fb | 789 | if (!netif_running(vxlan->dev)) |
790 | continue; | |
d342894c | 791 | |
7c47cedf | 792 | if (vxlan->default_dst.remote_ip == remote_ip) |
553675fb | 793 | return true; |
794 | } | |
d342894c | 795 | |
796 | return false; | |
797 | } | |
798 | ||
7c47cedf | 799 | static void vxlan_sock_hold(struct vxlan_sock *vs) |
d342894c | 800 | { |
7c47cedf SH |
801 | atomic_inc(&vs->refcnt); |
802 | } | |
d342894c | 803 | |
012a5729 | 804 | void vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 805 | { |
012a5729 PS |
806 | struct vxlan_net *vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
807 | ||
7c47cedf SH |
808 | if (!atomic_dec_and_test(&vs->refcnt)) |
809 | return; | |
d342894c | 810 | |
1c51a915 | 811 | spin_lock(&vn->sock_lock); |
7c47cedf | 812 | hlist_del_rcu(&vs->hlist); |
1c51a915 SH |
813 | spin_unlock(&vn->sock_lock); |
814 | ||
7c47cedf | 815 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 816 | } |
012a5729 | 817 | EXPORT_SYMBOL_GPL(vxlan_sock_release); |
d342894c | 818 | |
3fc2de2f | 819 | /* Callback to update multicast group membership when first VNI on |
820 | * multicast asddress is brought up | |
821 | * Done as workqueue because ip_mc_join_group acquires RTNL. | |
7c47cedf | 822 | */ |
3fc2de2f | 823 | static void vxlan_igmp_join(struct work_struct *work) |
d342894c | 824 | { |
3fc2de2f | 825 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_join); |
7c47cedf SH |
826 | struct vxlan_sock *vs = vxlan->vn_sock; |
827 | struct sock *sk = vs->sock->sk; | |
d342894c | 828 | struct ip_mreqn mreq = { |
c7995c43 AW |
829 | .imr_multiaddr.s_addr = vxlan->default_dst.remote_ip, |
830 | .imr_ifindex = vxlan->default_dst.remote_ifindex, | |
d342894c | 831 | }; |
832 | ||
d342894c | 833 | lock_sock(sk); |
3fc2de2f | 834 | ip_mc_join_group(sk, &mreq); |
835 | release_sock(sk); | |
836 | ||
012a5729 | 837 | vxlan_sock_release(vs); |
3fc2de2f | 838 | dev_put(vxlan->dev); |
839 | } | |
840 | ||
841 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
842 | static void vxlan_igmp_leave(struct work_struct *work) | |
843 | { | |
844 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_leave); | |
3fc2de2f | 845 | struct vxlan_sock *vs = vxlan->vn_sock; |
846 | struct sock *sk = vs->sock->sk; | |
847 | struct ip_mreqn mreq = { | |
848 | .imr_multiaddr.s_addr = vxlan->default_dst.remote_ip, | |
849 | .imr_ifindex = vxlan->default_dst.remote_ifindex, | |
850 | }; | |
851 | ||
852 | lock_sock(sk); | |
853 | ip_mc_leave_group(sk, &mreq); | |
d342894c | 854 | release_sock(sk); |
d342894c | 855 | |
012a5729 | 856 | vxlan_sock_release(vs); |
7c47cedf | 857 | dev_put(vxlan->dev); |
d342894c | 858 | } |
859 | ||
860 | /* Callback from net/ipv4/udp.c to receive packets */ | |
861 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
862 | { | |
5cfccc5a | 863 | struct vxlan_sock *vs; |
d342894c | 864 | struct vxlanhdr *vxh; |
553675fb | 865 | __be16 port; |
d342894c | 866 | |
d342894c | 867 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 868 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 869 | goto error; |
870 | ||
7ce04758 PS |
871 | /* Return packets with reserved bits set */ |
872 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
d342894c | 873 | if (vxh->vx_flags != htonl(VXLAN_FLAGS) || |
874 | (vxh->vx_vni & htonl(0xff))) { | |
875 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
876 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
877 | goto error; | |
878 | } | |
879 | ||
5cfccc5a PS |
880 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
881 | goto drop; | |
882 | ||
553675fb | 883 | port = inet_sk(sk)->inet_sport; |
5cfccc5a PS |
884 | |
885 | vs = vxlan_find_sock(sock_net(sk), port); | |
886 | if (!vs) | |
d342894c | 887 | goto drop; |
d342894c | 888 | |
5cfccc5a PS |
889 | vs->rcv(vs, skb, vxh->vx_vni); |
890 | return 0; | |
891 | ||
892 | drop: | |
893 | /* Consume bad packet */ | |
894 | kfree_skb(skb); | |
895 | return 0; | |
896 | ||
897 | error: | |
898 | /* Return non vxlan pkt */ | |
899 | return 1; | |
900 | } | |
901 | ||
902 | static void vxlan_rcv(struct vxlan_sock *vs, | |
903 | struct sk_buff *skb, __be32 vx_vni) | |
904 | { | |
905 | struct iphdr *oip; | |
906 | struct vxlan_dev *vxlan; | |
907 | struct pcpu_tstats *stats; | |
908 | __u32 vni; | |
909 | int err; | |
910 | ||
911 | vni = ntohl(vx_vni) >> 8; | |
912 | /* Is this VNI defined? */ | |
913 | vxlan = vxlan_vs_find_vni(vs, vni); | |
914 | if (!vxlan) | |
d342894c | 915 | goto drop; |
d342894c | 916 | |
e4f67add | 917 | skb_reset_mac_header(skb); |
d342894c | 918 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
d342894c | 919 | |
920 | /* Ignore packet loops (and multicast echo) */ | |
921 | if (compare_ether_addr(eth_hdr(skb)->h_source, | |
922 | vxlan->dev->dev_addr) == 0) | |
923 | goto drop; | |
924 | ||
7ce04758 PS |
925 | /* Re-examine inner Ethernet packet */ |
926 | oip = ip_hdr(skb); | |
26a41ae6 | 927 | if ((vxlan->flags & VXLAN_F_LEARN) && |
928 | vxlan_snoop(skb->dev, oip->saddr, eth_hdr(skb)->h_source)) | |
929 | goto drop; | |
d342894c | 930 | |
d342894c | 931 | skb_reset_network_header(skb); |
0afb1666 JG |
932 | |
933 | /* If the NIC driver gave us an encapsulated packet with | |
934 | * CHECKSUM_UNNECESSARY and Rx checksum feature is enabled, | |
935 | * leave the CHECKSUM_UNNECESSARY, the device checksummed it | |
936 | * for us. Otherwise force the upper layers to verify it. | |
937 | */ | |
938 | if (skb->ip_summed != CHECKSUM_UNNECESSARY || !skb->encapsulation || | |
939 | !(vxlan->dev->features & NETIF_F_RXCSUM)) | |
940 | skb->ip_summed = CHECKSUM_NONE; | |
941 | ||
942 | skb->encapsulation = 0; | |
d342894c | 943 | |
944 | err = IP_ECN_decapsulate(oip, skb); | |
945 | if (unlikely(err)) { | |
946 | if (log_ecn_error) | |
947 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
948 | &oip->saddr, oip->tos); | |
949 | if (err > 1) { | |
950 | ++vxlan->dev->stats.rx_frame_errors; | |
951 | ++vxlan->dev->stats.rx_errors; | |
952 | goto drop; | |
953 | } | |
954 | } | |
955 | ||
e8171045 | 956 | stats = this_cpu_ptr(vxlan->dev->tstats); |
d342894c | 957 | u64_stats_update_begin(&stats->syncp); |
958 | stats->rx_packets++; | |
959 | stats->rx_bytes += skb->len; | |
960 | u64_stats_update_end(&stats->syncp); | |
961 | ||
962 | netif_rx(skb); | |
963 | ||
5cfccc5a | 964 | return; |
d342894c | 965 | drop: |
966 | /* Consume bad packet */ | |
967 | kfree_skb(skb); | |
d342894c | 968 | } |
969 | ||
e4f67add DS |
970 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
971 | { | |
972 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
973 | struct arphdr *parp; | |
974 | u8 *arpptr, *sha; | |
975 | __be32 sip, tip; | |
976 | struct neighbour *n; | |
977 | ||
978 | if (dev->flags & IFF_NOARP) | |
979 | goto out; | |
980 | ||
981 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
982 | dev->stats.tx_dropped++; | |
983 | goto out; | |
984 | } | |
985 | parp = arp_hdr(skb); | |
986 | ||
987 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
988 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
989 | parp->ar_pro != htons(ETH_P_IP) || | |
990 | parp->ar_op != htons(ARPOP_REQUEST) || | |
991 | parp->ar_hln != dev->addr_len || | |
992 | parp->ar_pln != 4) | |
993 | goto out; | |
994 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
995 | sha = arpptr; | |
996 | arpptr += dev->addr_len; /* sha */ | |
997 | memcpy(&sip, arpptr, sizeof(sip)); | |
998 | arpptr += sizeof(sip); | |
999 | arpptr += dev->addr_len; /* tha */ | |
1000 | memcpy(&tip, arpptr, sizeof(tip)); | |
1001 | ||
1002 | if (ipv4_is_loopback(tip) || | |
1003 | ipv4_is_multicast(tip)) | |
1004 | goto out; | |
1005 | ||
1006 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1007 | ||
1008 | if (n) { | |
e4f67add DS |
1009 | struct vxlan_fdb *f; |
1010 | struct sk_buff *reply; | |
1011 | ||
1012 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1013 | neigh_release(n); | |
1014 | goto out; | |
1015 | } | |
1016 | ||
1017 | f = vxlan_find_mac(vxlan, n->ha); | |
5ca5461c | 1018 | if (f && first_remote_rcu(f)->remote_ip == htonl(INADDR_ANY)) { |
e4f67add DS |
1019 | /* bridge-local neighbor */ |
1020 | neigh_release(n); | |
1021 | goto out; | |
1022 | } | |
1023 | ||
1024 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1025 | n->ha, sha); | |
1026 | ||
1027 | neigh_release(n); | |
1028 | ||
1029 | skb_reset_mac_header(reply); | |
1030 | __skb_pull(reply, skb_network_offset(reply)); | |
1031 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1032 | reply->pkt_type = PACKET_HOST; | |
1033 | ||
1034 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1035 | dev->stats.rx_dropped++; | |
1036 | } else if (vxlan->flags & VXLAN_F_L3MISS) | |
1037 | vxlan_ip_miss(dev, tip); | |
1038 | out: | |
1039 | consume_skb(skb); | |
1040 | return NETDEV_TX_OK; | |
1041 | } | |
1042 | ||
1043 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) | |
1044 | { | |
1045 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1046 | struct neighbour *n; | |
1047 | struct iphdr *pip; | |
1048 | ||
1049 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1050 | return false; | |
1051 | ||
1052 | n = NULL; | |
1053 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1054 | case ETH_P_IP: | |
1055 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) | |
1056 | return false; | |
1057 | pip = ip_hdr(skb); | |
1058 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
1059 | break; | |
1060 | default: | |
1061 | return false; | |
1062 | } | |
1063 | ||
1064 | if (n) { | |
1065 | bool diff; | |
1066 | ||
1067 | diff = compare_ether_addr(eth_hdr(skb)->h_dest, n->ha) != 0; | |
1068 | if (diff) { | |
1069 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1070 | dev->addr_len); | |
1071 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1072 | } | |
1073 | neigh_release(n); | |
1074 | return diff; | |
1075 | } else if (vxlan->flags & VXLAN_F_L3MISS) | |
1076 | vxlan_ip_miss(dev, pip->daddr); | |
1077 | return false; | |
1078 | } | |
1079 | ||
553675fb | 1080 | static void vxlan_sock_put(struct sk_buff *skb) |
1cad8715 | 1081 | { |
1082 | sock_put(skb->sk); | |
1083 | } | |
1084 | ||
1085 | /* On transmit, associate with the tunnel socket */ | |
49560532 | 1086 | static void vxlan_set_owner(struct sock *sk, struct sk_buff *skb) |
1cad8715 | 1087 | { |
1cad8715 | 1088 | skb_orphan(skb); |
1089 | sock_hold(sk); | |
1090 | skb->sk = sk; | |
553675fb | 1091 | skb->destructor = vxlan_sock_put; |
1cad8715 | 1092 | } |
1093 | ||
05f47d69 | 1094 | /* Compute source port for outgoing packet |
1095 | * first choice to use L4 flow hash since it will spread | |
1096 | * better and maybe available from hardware | |
1097 | * secondary choice is to use jhash on the Ethernet header | |
1098 | */ | |
49560532 | 1099 | __be16 vxlan_src_port(__u16 port_min, __u16 port_max, struct sk_buff *skb) |
05f47d69 | 1100 | { |
49560532 | 1101 | unsigned int range = (port_max - port_min) + 1; |
05f47d69 | 1102 | u32 hash; |
1103 | ||
1104 | hash = skb_get_rxhash(skb); | |
1105 | if (!hash) | |
1106 | hash = jhash(skb->data, 2 * ETH_ALEN, | |
1107 | (__force u32) skb->protocol); | |
1108 | ||
49560532 | 1109 | return htons((((u64) hash * range) >> 32) + port_min); |
05f47d69 | 1110 | } |
49560532 | 1111 | EXPORT_SYMBOL_GPL(vxlan_src_port); |
05f47d69 | 1112 | |
05c0db08 PS |
1113 | static int handle_offloads(struct sk_buff *skb) |
1114 | { | |
1115 | if (skb_is_gso(skb)) { | |
1116 | int err = skb_unclone(skb, GFP_ATOMIC); | |
1117 | if (unlikely(err)) | |
1118 | return err; | |
1119 | ||
f6ace502 | 1120 | skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL; |
05c0db08 PS |
1121 | } else if (skb->ip_summed != CHECKSUM_PARTIAL) |
1122 | skb->ip_summed = CHECKSUM_NONE; | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
49560532 PS |
1127 | int vxlan_xmit_skb(struct net *net, struct vxlan_sock *vs, |
1128 | struct rtable *rt, struct sk_buff *skb, | |
1129 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, | |
1130 | __be16 src_port, __be16 dst_port, __be32 vni) | |
1131 | { | |
1132 | struct vxlanhdr *vxh; | |
1133 | struct udphdr *uh; | |
649c5b8b | 1134 | int min_headroom; |
49560532 PS |
1135 | int err; |
1136 | ||
1137 | if (!skb->encapsulation) { | |
1138 | skb_reset_inner_headers(skb); | |
1139 | skb->encapsulation = 1; | |
1140 | } | |
1141 | ||
649c5b8b | 1142 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 PS |
1143 | + VXLAN_HLEN + sizeof(struct iphdr) |
1144 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
649c5b8b PS |
1145 | |
1146 | /* Need space for new headers (invalidates iph ptr) */ | |
1147 | err = skb_cow_head(skb, min_headroom); | |
1148 | if (unlikely(err)) | |
1149 | return err; | |
1150 | ||
1eaa8178 PS |
1151 | if (vlan_tx_tag_present(skb)) { |
1152 | if (WARN_ON(!__vlan_put_tag(skb, | |
1153 | skb->vlan_proto, | |
1154 | vlan_tx_tag_get(skb)))) | |
1155 | return -ENOMEM; | |
1156 | ||
1157 | skb->vlan_tci = 0; | |
1158 | } | |
1159 | ||
49560532 PS |
1160 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
1161 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1162 | vxh->vx_vni = vni; | |
1163 | ||
1164 | __skb_push(skb, sizeof(*uh)); | |
1165 | skb_reset_transport_header(skb); | |
1166 | uh = udp_hdr(skb); | |
1167 | ||
1168 | uh->dest = dst_port; | |
1169 | uh->source = src_port; | |
1170 | ||
1171 | uh->len = htons(skb->len); | |
1172 | uh->check = 0; | |
1173 | ||
1174 | vxlan_set_owner(vs->sock->sk, skb); | |
1175 | ||
1176 | err = handle_offloads(skb); | |
1177 | if (err) | |
1178 | return err; | |
1179 | ||
1180 | return iptunnel_xmit(net, rt, skb, src, dst, | |
1181 | IPPROTO_UDP, tos, ttl, df); | |
1182 | } | |
1183 | EXPORT_SYMBOL_GPL(vxlan_xmit_skb); | |
1184 | ||
9dcc71e1 SS |
1185 | /* Bypass encapsulation if the destination is local */ |
1186 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1187 | struct vxlan_dev *dst_vxlan) | |
1188 | { | |
1189 | struct pcpu_tstats *tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); | |
1190 | struct pcpu_tstats *rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
1191 | ||
1192 | skb->pkt_type = PACKET_HOST; | |
1193 | skb->encapsulation = 0; | |
1194 | skb->dev = dst_vxlan->dev; | |
1195 | __skb_pull(skb, skb_network_offset(skb)); | |
1196 | ||
1197 | if (dst_vxlan->flags & VXLAN_F_LEARN) | |
9d9f163c MR |
1198 | vxlan_snoop(skb->dev, htonl(INADDR_LOOPBACK), |
1199 | eth_hdr(skb)->h_source); | |
9dcc71e1 SS |
1200 | |
1201 | u64_stats_update_begin(&tx_stats->syncp); | |
1202 | tx_stats->tx_packets++; | |
1203 | tx_stats->tx_bytes += skb->len; | |
1204 | u64_stats_update_end(&tx_stats->syncp); | |
1205 | ||
1206 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1207 | u64_stats_update_begin(&rx_stats->syncp); | |
1208 | rx_stats->rx_packets++; | |
1209 | rx_stats->rx_bytes += skb->len; | |
1210 | u64_stats_update_end(&rx_stats->syncp); | |
1211 | } else { | |
1212 | skb->dev->stats.rx_dropped++; | |
1213 | } | |
1214 | } | |
1215 | ||
4ad16930 SH |
1216 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1217 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1218 | { |
1219 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1220 | struct rtable *rt; | |
d342894c | 1221 | const struct iphdr *old_iph; |
d342894c | 1222 | struct flowi4 fl4; |
d342894c | 1223 | __be32 dst; |
7d836a76 | 1224 | __be16 src_port, dst_port; |
234f5b73 | 1225 | u32 vni; |
d342894c | 1226 | __be16 df = 0; |
1227 | __u8 tos, ttl; | |
0e6fbc5b | 1228 | int err; |
d342894c | 1229 | |
823aa873 | 1230 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; |
6681712d DS |
1231 | vni = rdst->remote_vni; |
1232 | dst = rdst->remote_ip; | |
e4f67add DS |
1233 | |
1234 | if (!dst) { | |
1235 | if (did_rsc) { | |
e4f67add | 1236 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1237 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1238 | return; |
e4f67add | 1239 | } |
ef59febe | 1240 | goto drop; |
e4f67add | 1241 | } |
ef59febe | 1242 | |
d342894c | 1243 | old_iph = ip_hdr(skb); |
1244 | ||
d342894c | 1245 | ttl = vxlan->ttl; |
1246 | if (!ttl && IN_MULTICAST(ntohl(dst))) | |
1247 | ttl = 1; | |
1248 | ||
1249 | tos = vxlan->tos; | |
1250 | if (tos == 1) | |
206aaafc | 1251 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1252 | |
49560532 | 1253 | src_port = vxlan_src_port(vxlan->port_min, vxlan->port_max, skb); |
d342894c | 1254 | |
ca78f181 | 1255 | memset(&fl4, 0, sizeof(fl4)); |
6681712d | 1256 | fl4.flowi4_oif = rdst->remote_ifindex; |
ca78f181 | 1257 | fl4.flowi4_tos = RT_TOS(tos); |
1258 | fl4.daddr = dst; | |
1259 | fl4.saddr = vxlan->saddr; | |
1260 | ||
1261 | rt = ip_route_output_key(dev_net(dev), &fl4); | |
d342894c | 1262 | if (IS_ERR(rt)) { |
1263 | netdev_dbg(dev, "no route to %pI4\n", &dst); | |
1264 | dev->stats.tx_carrier_errors++; | |
1265 | goto tx_error; | |
1266 | } | |
1267 | ||
1268 | if (rt->dst.dev == dev) { | |
1269 | netdev_dbg(dev, "circular route to %pI4\n", &dst); | |
d342894c | 1270 | dev->stats.collisions++; |
49560532 | 1271 | goto rt_tx_error; |
d342894c | 1272 | } |
1273 | ||
9dcc71e1 | 1274 | /* Bypass encapsulation if the destination is local */ |
ab09a6d0 MR |
1275 | if (rt->rt_flags & RTCF_LOCAL && |
1276 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
9dcc71e1 SS |
1277 | struct vxlan_dev *dst_vxlan; |
1278 | ||
1279 | ip_rt_put(rt); | |
553675fb | 1280 | dst_vxlan = vxlan_find_vni(dev_net(dev), vni, dst_port); |
9dcc71e1 SS |
1281 | if (!dst_vxlan) |
1282 | goto tx_error; | |
1283 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
4ad16930 | 1284 | return; |
9dcc71e1 | 1285 | } |
d342894c | 1286 | |
0e6fbc5b PS |
1287 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
1288 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
1289 | ||
49560532 PS |
1290 | err = vxlan_xmit_skb(dev_net(dev), vxlan->vn_sock, rt, skb, |
1291 | fl4.saddr, dst, tos, ttl, df, | |
1292 | src_port, dst_port, htonl(vni << 8)); | |
1293 | ||
1294 | if (err < 0) | |
1295 | goto rt_tx_error; | |
0e6fbc5b PS |
1296 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); |
1297 | ||
4ad16930 | 1298 | return; |
d342894c | 1299 | |
1300 | drop: | |
1301 | dev->stats.tx_dropped++; | |
1302 | goto tx_free; | |
1303 | ||
49560532 PS |
1304 | rt_tx_error: |
1305 | ip_rt_put(rt); | |
d342894c | 1306 | tx_error: |
1307 | dev->stats.tx_errors++; | |
1308 | tx_free: | |
1309 | dev_kfree_skb(skb); | |
d342894c | 1310 | } |
1311 | ||
6681712d DS |
1312 | /* Transmit local packets over Vxlan |
1313 | * | |
1314 | * Outer IP header inherits ECN and DF from inner header. | |
1315 | * Outer UDP destination is the VXLAN assigned port. | |
1316 | * source port is based on hash of flow | |
1317 | */ | |
1318 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
1319 | { | |
1320 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1321 | struct ethhdr *eth; | |
1322 | bool did_rsc = false; | |
afbd8bae | 1323 | struct vxlan_rdst *rdst; |
6681712d | 1324 | struct vxlan_fdb *f; |
6681712d DS |
1325 | |
1326 | skb_reset_mac_header(skb); | |
1327 | eth = eth_hdr(skb); | |
1328 | ||
1329 | if ((vxlan->flags & VXLAN_F_PROXY) && ntohs(eth->h_proto) == ETH_P_ARP) | |
1330 | return arp_reduce(dev, skb); | |
6681712d DS |
1331 | |
1332 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
ae884082 DS |
1333 | did_rsc = false; |
1334 | ||
1335 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
1336 | ntohs(eth->h_proto) == ETH_P_IP) { | |
1337 | did_rsc = route_shortcircuit(dev, skb); | |
1338 | if (did_rsc) | |
1339 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
1340 | } | |
1341 | ||
6681712d | 1342 | if (f == NULL) { |
afbd8bae MR |
1343 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
1344 | if (f == NULL) { | |
1345 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
1346 | !is_multicast_ether_addr(eth->h_dest)) | |
1347 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
1348 | ||
1349 | dev->stats.tx_dropped++; | |
1350 | dev_kfree_skb(skb); | |
1351 | return NETDEV_TX_OK; | |
1352 | } | |
1353 | } | |
6681712d | 1354 | |
afbd8bae MR |
1355 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
1356 | struct sk_buff *skb1; | |
6681712d | 1357 | |
afbd8bae MR |
1358 | skb1 = skb_clone(skb, GFP_ATOMIC); |
1359 | if (skb1) | |
1360 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
1361 | } |
1362 | ||
afbd8bae | 1363 | dev_kfree_skb(skb); |
4ad16930 | 1364 | return NETDEV_TX_OK; |
6681712d DS |
1365 | } |
1366 | ||
d342894c | 1367 | /* Walk the forwarding table and purge stale entries */ |
1368 | static void vxlan_cleanup(unsigned long arg) | |
1369 | { | |
1370 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
1371 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
1372 | unsigned int h; | |
1373 | ||
1374 | if (!netif_running(vxlan->dev)) | |
1375 | return; | |
1376 | ||
1377 | spin_lock_bh(&vxlan->hash_lock); | |
1378 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1379 | struct hlist_node *p, *n; | |
1380 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1381 | struct vxlan_fdb *f | |
1382 | = container_of(p, struct vxlan_fdb, hlist); | |
1383 | unsigned long timeout; | |
1384 | ||
3c172868 | 1385 | if (f->state & NUD_PERMANENT) |
d342894c | 1386 | continue; |
1387 | ||
1388 | timeout = f->used + vxlan->age_interval * HZ; | |
1389 | if (time_before_eq(timeout, jiffies)) { | |
1390 | netdev_dbg(vxlan->dev, | |
1391 | "garbage collect %pM\n", | |
1392 | f->eth_addr); | |
1393 | f->state = NUD_STALE; | |
1394 | vxlan_fdb_destroy(vxlan, f); | |
1395 | } else if (time_before(timeout, next_timer)) | |
1396 | next_timer = timeout; | |
1397 | } | |
1398 | } | |
1399 | spin_unlock_bh(&vxlan->hash_lock); | |
1400 | ||
1401 | mod_timer(&vxlan->age_timer, next_timer); | |
1402 | } | |
1403 | ||
9c2e24e1 PS |
1404 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
1405 | { | |
1406 | __u32 vni = vxlan->default_dst.remote_vni; | |
1407 | ||
1408 | vxlan->vn_sock = vs; | |
1409 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); | |
1410 | } | |
1411 | ||
d342894c | 1412 | /* Setup stats when device is created */ |
1413 | static int vxlan_init(struct net_device *dev) | |
1414 | { | |
1c51a915 SH |
1415 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1416 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
1417 | struct vxlan_sock *vs; | |
1c51a915 | 1418 | |
e8171045 PS |
1419 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
1420 | if (!dev->tstats) | |
d342894c | 1421 | return -ENOMEM; |
1422 | ||
1c51a915 | 1423 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 1424 | vs = vxlan_find_sock(dev_net(dev), vxlan->dst_port); |
1c51a915 SH |
1425 | if (vs) { |
1426 | /* If we have a socket with same port already, reuse it */ | |
1427 | atomic_inc(&vs->refcnt); | |
9c2e24e1 | 1428 | vxlan_vs_add_dev(vs, vxlan); |
1c51a915 SH |
1429 | } else { |
1430 | /* otherwise make new socket outside of RTNL */ | |
1431 | dev_hold(dev); | |
1432 | queue_work(vxlan_wq, &vxlan->sock_work); | |
1433 | } | |
1434 | spin_unlock(&vn->sock_lock); | |
1435 | ||
d342894c | 1436 | return 0; |
1437 | } | |
1438 | ||
ba609e9b | 1439 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
1440 | { |
1441 | struct vxlan_fdb *f; | |
1442 | ||
1443 | spin_lock_bh(&vxlan->hash_lock); | |
1444 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
1445 | if (f) | |
1446 | vxlan_fdb_destroy(vxlan, f); | |
1447 | spin_unlock_bh(&vxlan->hash_lock); | |
1448 | } | |
1449 | ||
ebf4063e SH |
1450 | static void vxlan_uninit(struct net_device *dev) |
1451 | { | |
1452 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e SH |
1453 | struct vxlan_sock *vs = vxlan->vn_sock; |
1454 | ||
ba609e9b | 1455 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 1456 | |
ebf4063e | 1457 | if (vs) |
012a5729 | 1458 | vxlan_sock_release(vs); |
ebf4063e SH |
1459 | free_percpu(dev->tstats); |
1460 | } | |
1461 | ||
d342894c | 1462 | /* Start ageing timer and join group when device is brought up */ |
1463 | static int vxlan_open(struct net_device *dev) | |
1464 | { | |
3fc2de2f | 1465 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 1466 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1c51a915 SH |
1467 | struct vxlan_sock *vs = vxlan->vn_sock; |
1468 | ||
1469 | /* socket hasn't been created */ | |
1470 | if (!vs) | |
1471 | return -ENOTCONN; | |
d342894c | 1472 | |
3fc2de2f | 1473 | if (IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip)) && |
614334df | 1474 | vxlan_group_used(vn, vxlan->default_dst.remote_ip)) { |
1c51a915 | 1475 | vxlan_sock_hold(vs); |
7c47cedf | 1476 | dev_hold(dev); |
3fc2de2f | 1477 | queue_work(vxlan_wq, &vxlan->igmp_join); |
d342894c | 1478 | } |
1479 | ||
1480 | if (vxlan->age_interval) | |
1481 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
1482 | ||
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | /* Purge the forwarding table */ | |
1487 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
1488 | { | |
31fec5aa | 1489 | unsigned int h; |
d342894c | 1490 | |
1491 | spin_lock_bh(&vxlan->hash_lock); | |
1492 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1493 | struct hlist_node *p, *n; | |
1494 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1495 | struct vxlan_fdb *f | |
1496 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
1497 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
1498 | if (!is_zero_ether_addr(f->eth_addr)) | |
1499 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 1500 | } |
1501 | } | |
1502 | spin_unlock_bh(&vxlan->hash_lock); | |
1503 | } | |
1504 | ||
1505 | /* Cleanup timer and forwarding table on shutdown */ | |
1506 | static int vxlan_stop(struct net_device *dev) | |
1507 | { | |
3fc2de2f | 1508 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 1509 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1c51a915 | 1510 | struct vxlan_sock *vs = vxlan->vn_sock; |
d342894c | 1511 | |
3fc2de2f | 1512 | if (vs && IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip)) && |
1513 | ! vxlan_group_used(vn, vxlan->default_dst.remote_ip)) { | |
1c51a915 | 1514 | vxlan_sock_hold(vs); |
7c47cedf | 1515 | dev_hold(dev); |
3fc2de2f | 1516 | queue_work(vxlan_wq, &vxlan->igmp_leave); |
7c47cedf | 1517 | } |
d342894c | 1518 | |
1519 | del_timer_sync(&vxlan->age_timer); | |
1520 | ||
1521 | vxlan_flush(vxlan); | |
1522 | ||
1523 | return 0; | |
1524 | } | |
1525 | ||
d342894c | 1526 | /* Stub, nothing needs to be done. */ |
1527 | static void vxlan_set_multicast_list(struct net_device *dev) | |
1528 | { | |
1529 | } | |
1530 | ||
1531 | static const struct net_device_ops vxlan_netdev_ops = { | |
1532 | .ndo_init = vxlan_init, | |
ebf4063e | 1533 | .ndo_uninit = vxlan_uninit, |
d342894c | 1534 | .ndo_open = vxlan_open, |
1535 | .ndo_stop = vxlan_stop, | |
1536 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 1537 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 1538 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
1539 | .ndo_change_mtu = eth_change_mtu, | |
1540 | .ndo_validate_addr = eth_validate_addr, | |
1541 | .ndo_set_mac_address = eth_mac_addr, | |
1542 | .ndo_fdb_add = vxlan_fdb_add, | |
1543 | .ndo_fdb_del = vxlan_fdb_delete, | |
1544 | .ndo_fdb_dump = vxlan_fdb_dump, | |
1545 | }; | |
1546 | ||
1547 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1548 | static struct device_type vxlan_type = { | |
1549 | .name = "vxlan", | |
1550 | }; | |
1551 | ||
d342894c | 1552 | /* Initialize the device structure. */ |
1553 | static void vxlan_setup(struct net_device *dev) | |
1554 | { | |
1555 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 1556 | unsigned int h; |
05f47d69 | 1557 | int low, high; |
d342894c | 1558 | |
1559 | eth_hw_addr_random(dev); | |
1560 | ether_setup(dev); | |
2840bf22 | 1561 | dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM; |
d342894c | 1562 | |
1563 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 1564 | dev->destructor = free_netdev; |
d342894c | 1565 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
1566 | ||
1567 | dev->tx_queue_len = 0; | |
1568 | dev->features |= NETIF_F_LLTX; | |
1569 | dev->features |= NETIF_F_NETNS_LOCAL; | |
d6727fe3 | 1570 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 1571 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 1572 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 1573 | |
1eaa8178 PS |
1574 | dev->vlan_features = dev->features; |
1575 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 1576 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 1577 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 1578 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
d342894c | 1579 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
6602d007 | 1580 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 1581 | |
553675fb | 1582 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 1583 | spin_lock_init(&vxlan->hash_lock); |
3fc2de2f | 1584 | INIT_WORK(&vxlan->igmp_join, vxlan_igmp_join); |
1585 | INIT_WORK(&vxlan->igmp_leave, vxlan_igmp_leave); | |
1c51a915 | 1586 | INIT_WORK(&vxlan->sock_work, vxlan_sock_work); |
d342894c | 1587 | |
1588 | init_timer_deferrable(&vxlan->age_timer); | |
1589 | vxlan->age_timer.function = vxlan_cleanup; | |
1590 | vxlan->age_timer.data = (unsigned long) vxlan; | |
1591 | ||
05f47d69 | 1592 | inet_get_local_port_range(&low, &high); |
1593 | vxlan->port_min = low; | |
1594 | vxlan->port_max = high; | |
823aa873 | 1595 | vxlan->dst_port = htons(vxlan_port); |
05f47d69 | 1596 | |
d342894c | 1597 | vxlan->dev = dev; |
1598 | ||
1599 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
1600 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
1601 | } | |
1602 | ||
1603 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
1604 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 1605 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
d342894c | 1606 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
1607 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
1608 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, | |
1609 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
1610 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
1611 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
1612 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 1613 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
1614 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
1615 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
1616 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
1617 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
823aa873 | 1618 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
d342894c | 1619 | }; |
1620 | ||
1621 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
1622 | { | |
1623 | if (tb[IFLA_ADDRESS]) { | |
1624 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
1625 | pr_debug("invalid link address (not ethernet)\n"); | |
1626 | return -EINVAL; | |
1627 | } | |
1628 | ||
1629 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
1630 | pr_debug("invalid all zero ethernet address\n"); | |
1631 | return -EADDRNOTAVAIL; | |
1632 | } | |
1633 | } | |
1634 | ||
1635 | if (!data) | |
1636 | return -EINVAL; | |
1637 | ||
1638 | if (data[IFLA_VXLAN_ID]) { | |
1639 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
1640 | if (id >= VXLAN_VID_MASK) | |
1641 | return -ERANGE; | |
1642 | } | |
1643 | ||
05f47d69 | 1644 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
1645 | const struct ifla_vxlan_port_range *p | |
1646 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
1647 | ||
1648 | if (ntohs(p->high) < ntohs(p->low)) { | |
1649 | pr_debug("port range %u .. %u not valid\n", | |
1650 | ntohs(p->low), ntohs(p->high)); | |
1651 | return -EINVAL; | |
1652 | } | |
1653 | } | |
1654 | ||
d342894c | 1655 | return 0; |
1656 | } | |
1657 | ||
1b13c97f YB |
1658 | static void vxlan_get_drvinfo(struct net_device *netdev, |
1659 | struct ethtool_drvinfo *drvinfo) | |
1660 | { | |
1661 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
1662 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
1663 | } | |
1664 | ||
1665 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
1666 | .get_drvinfo = vxlan_get_drvinfo, | |
1667 | .get_link = ethtool_op_get_link, | |
1668 | }; | |
1669 | ||
553675fb | 1670 | static void vxlan_del_work(struct work_struct *work) |
1671 | { | |
1672 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
1673 | ||
1674 | sk_release_kernel(vs->sock->sk); | |
1675 | kfree_rcu(vs, rcu); | |
1676 | } | |
1677 | ||
5cfccc5a | 1678 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, |
012a5729 | 1679 | vxlan_rcv_t *rcv, void *data) |
553675fb | 1680 | { |
9c2e24e1 | 1681 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
553675fb | 1682 | struct vxlan_sock *vs; |
1683 | struct sock *sk; | |
1684 | struct sockaddr_in vxlan_addr = { | |
1685 | .sin_family = AF_INET, | |
1686 | .sin_addr.s_addr = htonl(INADDR_ANY), | |
bb3fd687 | 1687 | .sin_port = port, |
553675fb | 1688 | }; |
1689 | int rc; | |
31fec5aa | 1690 | unsigned int h; |
553675fb | 1691 | |
1692 | vs = kmalloc(sizeof(*vs), GFP_KERNEL); | |
9c2e24e1 PS |
1693 | if (!vs) { |
1694 | pr_debug("memory alocation failure\n"); | |
553675fb | 1695 | return ERR_PTR(-ENOMEM); |
9c2e24e1 | 1696 | } |
553675fb | 1697 | |
1698 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
1699 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
1700 | ||
1701 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
1702 | ||
1703 | /* Create UDP socket for encapsulation receive. */ | |
1704 | rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &vs->sock); | |
1705 | if (rc < 0) { | |
1706 | pr_debug("UDP socket create failed\n"); | |
1707 | kfree(vs); | |
1708 | return ERR_PTR(rc); | |
1709 | } | |
1710 | ||
1711 | /* Put in proper namespace */ | |
1712 | sk = vs->sock->sk; | |
1713 | sk_change_net(sk, net); | |
1714 | ||
553675fb | 1715 | rc = kernel_bind(vs->sock, (struct sockaddr *) &vxlan_addr, |
1716 | sizeof(vxlan_addr)); | |
1717 | if (rc < 0) { | |
1718 | pr_debug("bind for UDP socket %pI4:%u (%d)\n", | |
1719 | &vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc); | |
1720 | sk_release_kernel(sk); | |
1721 | kfree(vs); | |
1722 | return ERR_PTR(rc); | |
1723 | } | |
9c2e24e1 | 1724 | atomic_set(&vs->refcnt, 1); |
5cfccc5a | 1725 | vs->rcv = rcv; |
012a5729 | 1726 | vs->data = data; |
553675fb | 1727 | |
1728 | /* Disable multicast loopback */ | |
1729 | inet_sk(sk)->mc_loop = 0; | |
9c2e24e1 PS |
1730 | spin_lock(&vn->sock_lock); |
1731 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
1732 | spin_unlock(&vn->sock_lock); | |
553675fb | 1733 | |
1734 | /* Mark socket as an encapsulation socket. */ | |
1735 | udp_sk(sk)->encap_type = 1; | |
1736 | udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; | |
1737 | udp_encap_enable(); | |
9c2e24e1 PS |
1738 | return vs; |
1739 | } | |
1740 | ||
012a5729 PS |
1741 | struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
1742 | vxlan_rcv_t *rcv, void *data, | |
1743 | bool no_share) | |
9c2e24e1 PS |
1744 | { |
1745 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
1746 | struct vxlan_sock *vs; | |
1747 | ||
012a5729 | 1748 | vs = vxlan_socket_create(net, port, rcv, data); |
9c2e24e1 PS |
1749 | if (!IS_ERR(vs)) |
1750 | return vs; | |
553675fb | 1751 | |
012a5729 PS |
1752 | if (no_share) /* Return error if sharing is not allowed. */ |
1753 | return vs; | |
1754 | ||
9c2e24e1 PS |
1755 | spin_lock(&vn->sock_lock); |
1756 | vs = vxlan_find_sock(net, port); | |
5cfccc5a PS |
1757 | if (vs) { |
1758 | if (vs->rcv == rcv) | |
1759 | atomic_inc(&vs->refcnt); | |
1760 | else | |
1761 | vs = ERR_PTR(-EBUSY); | |
1762 | } | |
1763 | spin_unlock(&vn->sock_lock); | |
1764 | ||
1765 | if (!vs) | |
9c2e24e1 PS |
1766 | vs = ERR_PTR(-EINVAL); |
1767 | ||
553675fb | 1768 | return vs; |
1769 | } | |
012a5729 | 1770 | EXPORT_SYMBOL_GPL(vxlan_sock_add); |
553675fb | 1771 | |
1c51a915 SH |
1772 | /* Scheduled at device creation to bind to a socket */ |
1773 | static void vxlan_sock_work(struct work_struct *work) | |
1774 | { | |
9c2e24e1 PS |
1775 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, sock_work); |
1776 | struct net *net = dev_net(vxlan->dev); | |
1c51a915 | 1777 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
9c2e24e1 PS |
1778 | __be16 port = vxlan->dst_port; |
1779 | struct vxlan_sock *nvs; | |
1c51a915 | 1780 | |
012a5729 | 1781 | nvs = vxlan_sock_add(net, port, vxlan_rcv, NULL, false); |
1c51a915 | 1782 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
1783 | if (!IS_ERR(nvs)) |
1784 | vxlan_vs_add_dev(nvs, vxlan); | |
1785 | spin_unlock(&vn->sock_lock); | |
1786 | ||
1787 | dev_put(vxlan->dev); | |
1c51a915 SH |
1788 | } |
1789 | ||
d342894c | 1790 | static int vxlan_newlink(struct net *net, struct net_device *dev, |
1791 | struct nlattr *tb[], struct nlattr *data[]) | |
1792 | { | |
553675fb | 1793 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
d342894c | 1794 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 1795 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 1796 | __u32 vni; |
1797 | int err; | |
1798 | ||
1799 | if (!data[IFLA_VXLAN_ID]) | |
1800 | return -EINVAL; | |
1801 | ||
1802 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); | |
c7995c43 | 1803 | dst->remote_vni = vni; |
d342894c | 1804 | |
5d174dd8 | 1805 | if (data[IFLA_VXLAN_GROUP]) |
1806 | dst->remote_ip = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
d342894c | 1807 | |
1808 | if (data[IFLA_VXLAN_LOCAL]) | |
1809 | vxlan->saddr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
1810 | ||
34e02aa1 | 1811 | if (data[IFLA_VXLAN_LINK] && |
c7995c43 | 1812 | (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { |
34e02aa1 | 1813 | struct net_device *lowerdev |
c7995c43 | 1814 | = __dev_get_by_index(net, dst->remote_ifindex); |
34e02aa1 | 1815 | |
1816 | if (!lowerdev) { | |
c7995c43 | 1817 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 1818 | return -ENODEV; |
1819 | } | |
d342894c | 1820 | |
34e02aa1 | 1821 | if (!tb[IFLA_MTU]) |
d342894c | 1822 | dev->mtu = lowerdev->mtu - VXLAN_HEADROOM; |
1ba56fb4 AD |
1823 | |
1824 | /* update header length based on lower device */ | |
1825 | dev->hard_header_len = lowerdev->hard_header_len + | |
1826 | VXLAN_HEADROOM; | |
d342894c | 1827 | } |
1828 | ||
1829 | if (data[IFLA_VXLAN_TOS]) | |
1830 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
1831 | ||
afb97186 VB |
1832 | if (data[IFLA_VXLAN_TTL]) |
1833 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
1834 | ||
d342894c | 1835 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 1836 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 1837 | |
1838 | if (data[IFLA_VXLAN_AGEING]) | |
1839 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
1840 | else | |
1841 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
1842 | ||
e4f67add DS |
1843 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
1844 | vxlan->flags |= VXLAN_F_PROXY; | |
1845 | ||
1846 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
1847 | vxlan->flags |= VXLAN_F_RSC; | |
1848 | ||
1849 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
1850 | vxlan->flags |= VXLAN_F_L2MISS; | |
1851 | ||
1852 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
1853 | vxlan->flags |= VXLAN_F_L3MISS; | |
1854 | ||
d342894c | 1855 | if (data[IFLA_VXLAN_LIMIT]) |
1856 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
1857 | ||
05f47d69 | 1858 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
1859 | const struct ifla_vxlan_port_range *p | |
1860 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
1861 | vxlan->port_min = ntohs(p->low); | |
1862 | vxlan->port_max = ntohs(p->high); | |
1863 | } | |
1864 | ||
823aa873 | 1865 | if (data[IFLA_VXLAN_PORT]) |
1866 | vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
1867 | ||
553675fb | 1868 | if (vxlan_find_vni(net, vni, vxlan->dst_port)) { |
1869 | pr_info("duplicate VNI %u\n", vni); | |
1870 | return -EEXIST; | |
1871 | } | |
1872 | ||
1b13c97f YB |
1873 | SET_ETHTOOL_OPS(dev, &vxlan_ethtool_ops); |
1874 | ||
afbd8bae MR |
1875 | /* create an fdb entry for default destination */ |
1876 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
1877 | vxlan->default_dst.remote_ip, | |
1878 | NUD_REACHABLE|NUD_PERMANENT, | |
1879 | NLM_F_EXCL|NLM_F_CREATE, | |
1880 | vxlan->dst_port, vxlan->default_dst.remote_vni, | |
1881 | vxlan->default_dst.remote_ifindex, NTF_SELF); | |
1c51a915 | 1882 | if (err) |
553675fb | 1883 | return err; |
d342894c | 1884 | |
afbd8bae MR |
1885 | err = register_netdevice(dev); |
1886 | if (err) { | |
ba609e9b | 1887 | vxlan_fdb_delete_default(vxlan); |
afbd8bae MR |
1888 | return err; |
1889 | } | |
1890 | ||
553675fb | 1891 | list_add(&vxlan->next, &vn->vxlan_list); |
553675fb | 1892 | |
1893 | return 0; | |
d342894c | 1894 | } |
1895 | ||
1896 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
1897 | { | |
fe5c3561 | 1898 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 1899 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1900 | ||
fe5c3561 | 1901 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
1902 | if (!hlist_unhashed(&vxlan->hlist)) |
1903 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 1904 | spin_unlock(&vn->sock_lock); |
1905 | ||
553675fb | 1906 | list_del(&vxlan->next); |
d342894c | 1907 | unregister_netdevice_queue(dev, head); |
1908 | } | |
1909 | ||
1910 | static size_t vxlan_get_size(const struct net_device *dev) | |
1911 | { | |
1912 | ||
1913 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
5d174dd8 | 1914 | nla_total_size(sizeof(__be32)) +/* IFLA_VXLAN_GROUP */ |
d342894c | 1915 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
1916 | nla_total_size(sizeof(__be32))+ /* IFLA_VXLAN_LOCAL */ | |
1917 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ | |
1918 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
1919 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
1920 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
1921 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
1922 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
1923 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 1924 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
1925 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 1926 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
823aa873 | 1927 | nla_total_size(sizeof(__be16))+ /* IFLA_VXLAN_PORT */ |
d342894c | 1928 | 0; |
1929 | } | |
1930 | ||
1931 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1932 | { | |
1933 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 1934 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 1935 | struct ifla_vxlan_port_range ports = { |
1936 | .low = htons(vxlan->port_min), | |
1937 | .high = htons(vxlan->port_max), | |
1938 | }; | |
d342894c | 1939 | |
c7995c43 | 1940 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 1941 | goto nla_put_failure; |
1942 | ||
5d174dd8 | 1943 | if (dst->remote_ip && nla_put_be32(skb, IFLA_VXLAN_GROUP, dst->remote_ip)) |
d342894c | 1944 | goto nla_put_failure; |
1945 | ||
c7995c43 | 1946 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 1947 | goto nla_put_failure; |
1948 | ||
7c41c42c | 1949 | if (vxlan->saddr && nla_put_be32(skb, IFLA_VXLAN_LOCAL, vxlan->saddr)) |
d342894c | 1950 | goto nla_put_failure; |
1951 | ||
1952 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
1953 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
1954 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
1955 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
1956 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
1957 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
1958 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
1959 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
1960 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
1961 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
1962 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 1963 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
823aa873 | 1964 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || |
1965 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port)) | |
d342894c | 1966 | goto nla_put_failure; |
1967 | ||
05f47d69 | 1968 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
1969 | goto nla_put_failure; | |
1970 | ||
d342894c | 1971 | return 0; |
1972 | ||
1973 | nla_put_failure: | |
1974 | return -EMSGSIZE; | |
1975 | } | |
1976 | ||
1977 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { | |
1978 | .kind = "vxlan", | |
1979 | .maxtype = IFLA_VXLAN_MAX, | |
1980 | .policy = vxlan_policy, | |
1981 | .priv_size = sizeof(struct vxlan_dev), | |
1982 | .setup = vxlan_setup, | |
1983 | .validate = vxlan_validate, | |
1984 | .newlink = vxlan_newlink, | |
1985 | .dellink = vxlan_dellink, | |
1986 | .get_size = vxlan_get_size, | |
1987 | .fill_info = vxlan_fill_info, | |
1988 | }; | |
1989 | ||
1990 | static __net_init int vxlan_init_net(struct net *net) | |
1991 | { | |
1992 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 1993 | unsigned int h; |
d342894c | 1994 | |
553675fb | 1995 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 1996 | spin_lock_init(&vn->sock_lock); |
d342894c | 1997 | |
553675fb | 1998 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
1999 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 2000 | |
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | static __net_exit void vxlan_exit_net(struct net *net) | |
2005 | { | |
2006 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
9cb6cb7e | 2007 | struct vxlan_dev *vxlan; |
372675a4 | 2008 | LIST_HEAD(list); |
9cb6cb7e ZM |
2009 | |
2010 | rtnl_lock(); | |
553675fb | 2011 | list_for_each_entry(vxlan, &vn->vxlan_list, next) |
372675a4 | 2012 | unregister_netdevice_queue(vxlan->dev, &list); |
2013 | unregister_netdevice_many(&list); | |
9cb6cb7e | 2014 | rtnl_unlock(); |
d342894c | 2015 | } |
2016 | ||
2017 | static struct pernet_operations vxlan_net_ops = { | |
2018 | .init = vxlan_init_net, | |
2019 | .exit = vxlan_exit_net, | |
2020 | .id = &vxlan_net_id, | |
2021 | .size = sizeof(struct vxlan_net), | |
2022 | }; | |
2023 | ||
2024 | static int __init vxlan_init_module(void) | |
2025 | { | |
2026 | int rc; | |
2027 | ||
758c57d1 SH |
2028 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
2029 | if (!vxlan_wq) | |
2030 | return -ENOMEM; | |
2031 | ||
d342894c | 2032 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
2033 | ||
2034 | rc = register_pernet_device(&vxlan_net_ops); | |
2035 | if (rc) | |
2036 | goto out1; | |
2037 | ||
2038 | rc = rtnl_link_register(&vxlan_link_ops); | |
2039 | if (rc) | |
2040 | goto out2; | |
2041 | ||
2042 | return 0; | |
2043 | ||
2044 | out2: | |
2045 | unregister_pernet_device(&vxlan_net_ops); | |
2046 | out1: | |
758c57d1 | 2047 | destroy_workqueue(vxlan_wq); |
d342894c | 2048 | return rc; |
2049 | } | |
7332a13b | 2050 | late_initcall(vxlan_init_module); |
d342894c | 2051 | |
2052 | static void __exit vxlan_cleanup_module(void) | |
2053 | { | |
b7153984 | 2054 | rtnl_link_unregister(&vxlan_link_ops); |
758c57d1 | 2055 | destroy_workqueue(vxlan_wq); |
f89e57c4 | 2056 | unregister_pernet_device(&vxlan_net_ops); |
6681712d | 2057 | rcu_barrier(); |
d342894c | 2058 | } |
2059 | module_exit(vxlan_cleanup_module); | |
2060 | ||
2061 | MODULE_LICENSE("GPL"); | |
2062 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 2063 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
d342894c | 2064 | MODULE_ALIAS_RTNL_LINK("vxlan"); |