Commit | Line | Data |
---|---|---|
d342894c | 1 | /* |
eb5ce439 | 2 | * VXLAN: Virtual eXtensible Local Area Network |
d342894c | 3 | * |
3b8df3c6 | 4 | * Copyright (c) 2012-2013 Vyatta Inc. |
d342894c | 5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
d342894c | 9 | */ |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/rculist.h> | |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/in.h> | |
22 | #include <linux/ip.h> | |
23 | #include <linux/udp.h> | |
24 | #include <linux/igmp.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/if_ether.h> | |
1eaa8178 | 27 | #include <linux/if_vlan.h> |
d342894c | 28 | #include <linux/hash.h> |
1b13c97f | 29 | #include <linux/ethtool.h> |
e4f67add DS |
30 | #include <net/arp.h> |
31 | #include <net/ndisc.h> | |
d342894c | 32 | #include <net/ip.h> |
c5441932 | 33 | #include <net/ip_tunnels.h> |
d342894c | 34 | #include <net/icmp.h> |
35 | #include <net/udp.h> | |
3ee64f39 | 36 | #include <net/udp_tunnel.h> |
d342894c | 37 | #include <net/rtnetlink.h> |
38 | #include <net/route.h> | |
39 | #include <net/dsfield.h> | |
40 | #include <net/inet_ecn.h> | |
41 | #include <net/net_namespace.h> | |
42 | #include <net/netns/generic.h> | |
012a5729 | 43 | #include <net/vxlan.h> |
dc01e7d3 | 44 | #include <net/protocol.h> |
acbf74a7 | 45 | #include <net/udp_tunnel.h> |
e4c7ed41 CW |
46 | #if IS_ENABLED(CONFIG_IPV6) |
47 | #include <net/ipv6.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/ip6_tunnel.h> | |
660d98ca | 50 | #include <net/ip6_checksum.h> |
e4c7ed41 | 51 | #endif |
ee122c79 | 52 | #include <net/dst_metadata.h> |
d342894c | 53 | |
54 | #define VXLAN_VERSION "0.1" | |
55 | ||
553675fb | 56 | #define PORT_HASH_BITS 8 |
57 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 58 | #define FDB_AGE_DEFAULT 300 /* 5 min */ |
59 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
60 | ||
23c578bf | 61 | /* UDP port for VXLAN traffic. |
62 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 63 | * for compatibility with early adopters. |
23c578bf | 64 | */ |
9daaa397 SH |
65 | static unsigned short vxlan_port __read_mostly = 8472; |
66 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 67 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
68 | ||
69 | static bool log_ecn_error = true; | |
70 | module_param(log_ecn_error, bool, 0644); | |
71 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
72 | ||
60d9d4c6 | 73 | static int vxlan_net_id; |
0dfbdf41 | 74 | static struct rtnl_link_ops vxlan_link_ops; |
553675fb | 75 | |
afbd8bae MR |
76 | static const u8 all_zeros_mac[ETH_ALEN]; |
77 | ||
614732ea TG |
78 | static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
79 | bool no_share, u32 flags); | |
80 | ||
553675fb | 81 | /* per-network namespace private data for this module */ |
82 | struct vxlan_net { | |
83 | struct list_head vxlan_list; | |
84 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 85 | spinlock_t sock_lock; |
553675fb | 86 | }; |
87 | ||
d342894c | 88 | /* Forwarding table entry */ |
89 | struct vxlan_fdb { | |
90 | struct hlist_node hlist; /* linked list of entries */ | |
91 | struct rcu_head rcu; | |
92 | unsigned long updated; /* jiffies */ | |
93 | unsigned long used; | |
3e61aa8f | 94 | struct list_head remotes; |
7177a3b0 | 95 | u8 eth_addr[ETH_ALEN]; |
d342894c | 96 | u16 state; /* see ndm_state */ |
ae884082 | 97 | u8 flags; /* see ndm_flags */ |
d342894c | 98 | }; |
99 | ||
d342894c | 100 | /* salt for hash table */ |
101 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 102 | static struct workqueue_struct *vxlan_wq; |
d342894c | 103 | |
ee122c79 TG |
104 | static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
105 | { | |
e7030878 TG |
106 | return vs->flags & VXLAN_F_COLLECT_METADATA || |
107 | ip_tunnel_collect_metadata(); | |
ee122c79 TG |
108 | } |
109 | ||
e4c7ed41 CW |
110 | #if IS_ENABLED(CONFIG_IPV6) |
111 | static inline | |
112 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
113 | { | |
f0ef3126 JB |
114 | if (a->sa.sa_family != b->sa.sa_family) |
115 | return false; | |
116 | if (a->sa.sa_family == AF_INET6) | |
117 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
118 | else | |
119 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
e4c7ed41 CW |
120 | } |
121 | ||
122 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
123 | { | |
f0ef3126 JB |
124 | if (ipa->sa.sa_family == AF_INET6) |
125 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
126 | else | |
127 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
e4c7ed41 CW |
128 | } |
129 | ||
130 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
131 | { | |
f0ef3126 JB |
132 | if (ipa->sa.sa_family == AF_INET6) |
133 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
134 | else | |
135 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
e4c7ed41 CW |
136 | } |
137 | ||
138 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
139 | { | |
f0ef3126 | 140 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
67b61f6c | 141 | ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
f0ef3126 JB |
142 | ip->sa.sa_family = AF_INET6; |
143 | return 0; | |
144 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 145 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
146 | ip->sa.sa_family = AF_INET; |
147 | return 0; | |
148 | } else { | |
149 | return -EAFNOSUPPORT; | |
150 | } | |
e4c7ed41 CW |
151 | } |
152 | ||
153 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 154 | const union vxlan_addr *ip) |
e4c7ed41 | 155 | { |
f0ef3126 | 156 | if (ip->sa.sa_family == AF_INET6) |
930345ea | 157 | return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
f0ef3126 | 158 | else |
930345ea | 159 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
160 | } |
161 | ||
162 | #else /* !CONFIG_IPV6 */ | |
163 | ||
164 | static inline | |
165 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
166 | { | |
f0ef3126 | 167 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
e4c7ed41 CW |
168 | } |
169 | ||
170 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
171 | { | |
f0ef3126 | 172 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); |
e4c7ed41 CW |
173 | } |
174 | ||
175 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
176 | { | |
f0ef3126 | 177 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); |
e4c7ed41 CW |
178 | } |
179 | ||
180 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
181 | { | |
f0ef3126 JB |
182 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
183 | return -EAFNOSUPPORT; | |
184 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 185 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
186 | ip->sa.sa_family = AF_INET; |
187 | return 0; | |
188 | } else { | |
189 | return -EAFNOSUPPORT; | |
190 | } | |
e4c7ed41 CW |
191 | } |
192 | ||
193 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 194 | const union vxlan_addr *ip) |
e4c7ed41 | 195 | { |
930345ea | 196 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
197 | } |
198 | #endif | |
199 | ||
553675fb | 200 | /* Virtual Network hash table head */ |
201 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
202 | { | |
203 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
204 | } | |
205 | ||
206 | /* Socket hash table head */ | |
207 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 208 | { |
209 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
210 | ||
553675fb | 211 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
212 | } | |
213 | ||
3e61aa8f SH |
214 | /* First remote destination for a forwarding entry. |
215 | * Guaranteed to be non-NULL because remotes are never deleted. | |
216 | */ | |
5ca5461c | 217 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 218 | { |
5ca5461c | 219 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
220 | } | |
221 | ||
222 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
223 | { | |
224 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
225 | } |
226 | ||
ac5132d1 TG |
227 | /* Find VXLAN socket based on network namespace, address family and UDP port |
228 | * and enabled unshareable flags. | |
229 | */ | |
230 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
231 | __be16 port, u32 flags) | |
553675fb | 232 | { |
233 | struct vxlan_sock *vs; | |
af33c1ad TH |
234 | |
235 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 236 | |
237 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 238 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
ac5132d1 | 239 | inet_sk(vs->sock->sk)->sk.sk_family == family && |
af33c1ad | 240 | vs->flags == flags) |
553675fb | 241 | return vs; |
242 | } | |
243 | return NULL; | |
d342894c | 244 | } |
245 | ||
5cfccc5a | 246 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id) |
d342894c | 247 | { |
248 | struct vxlan_dev *vxlan; | |
d342894c | 249 | |
553675fb | 250 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { |
c7995c43 | 251 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 252 | return vxlan; |
253 | } | |
254 | ||
255 | return NULL; | |
256 | } | |
257 | ||
5cfccc5a | 258 | /* Look up VNI in a per net namespace table */ |
19ca9fc1 | 259 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, |
ac5132d1 TG |
260 | sa_family_t family, __be16 port, |
261 | u32 flags) | |
5cfccc5a PS |
262 | { |
263 | struct vxlan_sock *vs; | |
264 | ||
ac5132d1 | 265 | vs = vxlan_find_sock(net, family, port, flags); |
5cfccc5a PS |
266 | if (!vs) |
267 | return NULL; | |
268 | ||
269 | return vxlan_vs_find_vni(vs, id); | |
270 | } | |
271 | ||
d342894c | 272 | /* Fill in neighbour message in skbuff. */ |
273 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
274 | const struct vxlan_fdb *fdb, |
275 | u32 portid, u32 seq, int type, unsigned int flags, | |
276 | const struct vxlan_rdst *rdst) | |
d342894c | 277 | { |
278 | unsigned long now = jiffies; | |
279 | struct nda_cacheinfo ci; | |
280 | struct nlmsghdr *nlh; | |
281 | struct ndmsg *ndm; | |
e4f67add | 282 | bool send_ip, send_eth; |
d342894c | 283 | |
284 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
285 | if (nlh == NULL) | |
286 | return -EMSGSIZE; | |
287 | ||
288 | ndm = nlmsg_data(nlh); | |
289 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
290 | |
291 | send_eth = send_ip = true; | |
292 | ||
293 | if (type == RTM_GETNEIGH) { | |
294 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 295 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
296 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
297 | } else | |
298 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 299 | ndm->ndm_state = fdb->state; |
300 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 301 | ndm->ndm_flags = fdb->flags; |
545469f7 | 302 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 303 | |
193523bf | 304 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 305 | nla_put_s32(skb, NDA_LINK_NETNSID, |
7a0877d4 | 306 | peernet2id_alloc(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
307 | goto nla_put_failure; |
308 | ||
e4f67add | 309 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 310 | goto nla_put_failure; |
311 | ||
e4c7ed41 | 312 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
313 | goto nla_put_failure; |
314 | ||
0dfbdf41 | 315 | if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && |
6681712d DS |
316 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
317 | goto nla_put_failure; | |
c7995c43 | 318 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 319 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
320 | goto nla_put_failure; |
321 | if (rdst->remote_ifindex && | |
322 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 323 | goto nla_put_failure; |
324 | ||
325 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
326 | ci.ndm_confirmed = 0; | |
327 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
328 | ci.ndm_refcnt = 0; | |
329 | ||
330 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
331 | goto nla_put_failure; | |
332 | ||
053c095a JB |
333 | nlmsg_end(skb, nlh); |
334 | return 0; | |
d342894c | 335 | |
336 | nla_put_failure: | |
337 | nlmsg_cancel(skb, nlh); | |
338 | return -EMSGSIZE; | |
339 | } | |
340 | ||
341 | static inline size_t vxlan_nlmsg_size(void) | |
342 | { | |
343 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
344 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 345 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 346 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
347 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
348 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 349 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 350 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
351 | } | |
352 | ||
9e4b93f9 ND |
353 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
354 | struct vxlan_rdst *rd, int type) | |
d342894c | 355 | { |
356 | struct net *net = dev_net(vxlan->dev); | |
357 | struct sk_buff *skb; | |
358 | int err = -ENOBUFS; | |
359 | ||
360 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
361 | if (skb == NULL) | |
362 | goto errout; | |
363 | ||
9e4b93f9 | 364 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 365 | if (err < 0) { |
366 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
367 | WARN_ON(err == -EMSGSIZE); | |
368 | kfree_skb(skb); | |
369 | goto errout; | |
370 | } | |
371 | ||
372 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
373 | return; | |
374 | errout: | |
375 | if (err < 0) | |
376 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
377 | } | |
378 | ||
e4c7ed41 | 379 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
380 | { |
381 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
382 | struct vxlan_fdb f = { |
383 | .state = NUD_STALE, | |
384 | }; | |
385 | struct vxlan_rdst remote = { | |
e4c7ed41 | 386 | .remote_ip = *ipa, /* goes to NDA_DST */ |
bb3fd687 SH |
387 | .remote_vni = VXLAN_N_VID, |
388 | }; | |
3e61aa8f | 389 | |
9e4b93f9 | 390 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
391 | } |
392 | ||
393 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
394 | { | |
bb3fd687 SH |
395 | struct vxlan_fdb f = { |
396 | .state = NUD_STALE, | |
397 | }; | |
9e4b93f9 | 398 | struct vxlan_rdst remote = { }; |
e4f67add | 399 | |
e4f67add DS |
400 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
401 | ||
9e4b93f9 | 402 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
403 | } |
404 | ||
d342894c | 405 | /* Hash Ethernet address */ |
406 | static u32 eth_hash(const unsigned char *addr) | |
407 | { | |
408 | u64 value = get_unaligned((u64 *)addr); | |
409 | ||
410 | /* only want 6 bytes */ | |
411 | #ifdef __BIG_ENDIAN | |
d342894c | 412 | value >>= 16; |
321fb991 | 413 | #else |
414 | value <<= 16; | |
d342894c | 415 | #endif |
416 | return hash_64(value, FDB_HASH_BITS); | |
417 | } | |
418 | ||
419 | /* Hash chain to use given mac address */ | |
420 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
421 | const u8 *mac) | |
422 | { | |
423 | return &vxlan->fdb_head[eth_hash(mac)]; | |
424 | } | |
425 | ||
426 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 427 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 428 | const u8 *mac) |
d342894c | 429 | { |
430 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
431 | struct vxlan_fdb *f; | |
d342894c | 432 | |
b67bfe0d | 433 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 434 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 435 | return f; |
436 | } | |
437 | ||
438 | return NULL; | |
439 | } | |
440 | ||
014be2c8 SS |
441 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
442 | const u8 *mac) | |
443 | { | |
444 | struct vxlan_fdb *f; | |
445 | ||
446 | f = __vxlan_find_mac(vxlan, mac); | |
447 | if (f) | |
448 | f->used = jiffies; | |
449 | ||
450 | return f; | |
451 | } | |
452 | ||
a5e7c10a MR |
453 | /* caller should hold vxlan->hash_lock */ |
454 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 455 | union vxlan_addr *ip, __be16 port, |
a5e7c10a | 456 | __u32 vni, __u32 ifindex) |
6681712d | 457 | { |
3e61aa8f | 458 | struct vxlan_rdst *rd; |
6681712d | 459 | |
3e61aa8f | 460 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 461 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
462 | rd->remote_port == port && |
463 | rd->remote_vni == vni && | |
464 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 465 | return rd; |
6681712d | 466 | } |
3e61aa8f | 467 | |
a5e7c10a MR |
468 | return NULL; |
469 | } | |
470 | ||
906dc186 TR |
471 | /* Replace destination of unicast mac */ |
472 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
e4c7ed41 | 473 | union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex) |
906dc186 TR |
474 | { |
475 | struct vxlan_rdst *rd; | |
476 | ||
477 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
478 | if (rd) | |
479 | return 0; | |
480 | ||
481 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
482 | if (!rd) | |
483 | return 0; | |
e4c7ed41 | 484 | rd->remote_ip = *ip; |
906dc186 TR |
485 | rd->remote_port = port; |
486 | rd->remote_vni = vni; | |
487 | rd->remote_ifindex = ifindex; | |
488 | return 1; | |
489 | } | |
490 | ||
a5e7c10a MR |
491 | /* Add/update destinations for multicast */ |
492 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
9e4b93f9 ND |
493 | union vxlan_addr *ip, __be16 port, __u32 vni, |
494 | __u32 ifindex, struct vxlan_rdst **rdp) | |
a5e7c10a MR |
495 | { |
496 | struct vxlan_rdst *rd; | |
497 | ||
498 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
499 | if (rd) | |
500 | return 0; | |
501 | ||
6681712d DS |
502 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
503 | if (rd == NULL) | |
504 | return -ENOBUFS; | |
e4c7ed41 | 505 | rd->remote_ip = *ip; |
6681712d DS |
506 | rd->remote_port = port; |
507 | rd->remote_vni = vni; | |
508 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
509 | |
510 | list_add_tail_rcu(&rd->list, &f->remotes); | |
511 | ||
9e4b93f9 | 512 | *rdp = rd; |
6681712d DS |
513 | return 1; |
514 | } | |
515 | ||
dfd8645e TH |
516 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
517 | unsigned int off, | |
518 | struct vxlanhdr *vh, size_t hdrlen, | |
0ace2ca8 TH |
519 | u32 data, struct gro_remcsum *grc, |
520 | bool nopartial) | |
dfd8645e TH |
521 | { |
522 | size_t start, offset, plen; | |
dfd8645e TH |
523 | |
524 | if (skb->remcsum_offload) | |
26c4f7da | 525 | return NULL; |
dfd8645e TH |
526 | |
527 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
528 | return NULL; | |
529 | ||
530 | start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; | |
531 | offset = start + ((data & VXLAN_RCO_UDP) ? | |
532 | offsetof(struct udphdr, check) : | |
533 | offsetof(struct tcphdr, check)); | |
534 | ||
535 | plen = hdrlen + offset + sizeof(u16); | |
536 | ||
537 | /* Pull checksum that will be written */ | |
538 | if (skb_gro_header_hard(skb, off + plen)) { | |
539 | vh = skb_gro_header_slow(skb, off + plen, off); | |
540 | if (!vh) | |
541 | return NULL; | |
542 | } | |
543 | ||
26c4f7da | 544 | skb_gro_remcsum_process(skb, (void *)vh + hdrlen, |
0ace2ca8 | 545 | start, offset, grc, nopartial); |
dfd8645e TH |
546 | |
547 | skb->remcsum_offload = 1; | |
548 | ||
549 | return vh; | |
550 | } | |
551 | ||
a2b12f3c TH |
552 | static struct sk_buff **vxlan_gro_receive(struct sk_buff **head, |
553 | struct sk_buff *skb, | |
554 | struct udp_offload *uoff) | |
dc01e7d3 OG |
555 | { |
556 | struct sk_buff *p, **pp = NULL; | |
557 | struct vxlanhdr *vh, *vh2; | |
9b174d88 | 558 | unsigned int hlen, off_vx; |
dc01e7d3 | 559 | int flush = 1; |
dfd8645e TH |
560 | struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock, |
561 | udp_offloads); | |
562 | u32 flags; | |
26c4f7da TH |
563 | struct gro_remcsum grc; |
564 | ||
565 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
566 | |
567 | off_vx = skb_gro_offset(skb); | |
568 | hlen = off_vx + sizeof(*vh); | |
569 | vh = skb_gro_header_fast(skb, off_vx); | |
570 | if (skb_gro_header_hard(skb, hlen)) { | |
571 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
572 | if (unlikely(!vh)) | |
573 | goto out; | |
574 | } | |
dc01e7d3 | 575 | |
dfd8645e TH |
576 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
577 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); | |
578 | ||
579 | flags = ntohl(vh->vx_flags); | |
580 | ||
581 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
582 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
0ace2ca8 TH |
583 | ntohl(vh->vx_vni), &grc, |
584 | !!(vs->flags & | |
585 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
586 | |
587 | if (!vh) | |
588 | goto out; | |
589 | } | |
590 | ||
dc01e7d3 OG |
591 | flush = 0; |
592 | ||
593 | for (p = *head; p; p = p->next) { | |
594 | if (!NAPI_GRO_CB(p)->same_flow) | |
595 | continue; | |
596 | ||
597 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
598 | if (vh->vx_flags != vh2->vx_flags || |
599 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
600 | NAPI_GRO_CB(p)->same_flow = 0; |
601 | continue; | |
602 | } | |
dc01e7d3 OG |
603 | } |
604 | ||
9b174d88 | 605 | pp = eth_gro_receive(head, skb); |
dc01e7d3 | 606 | |
dc01e7d3 | 607 | out: |
26c4f7da | 608 | skb_gro_remcsum_cleanup(skb, &grc); |
dc01e7d3 OG |
609 | NAPI_GRO_CB(skb)->flush |= flush; |
610 | ||
611 | return pp; | |
612 | } | |
613 | ||
a2b12f3c TH |
614 | static int vxlan_gro_complete(struct sk_buff *skb, int nhoff, |
615 | struct udp_offload *uoff) | |
dc01e7d3 | 616 | { |
cfdf1e1b JG |
617 | udp_tunnel_gro_complete(skb, nhoff); |
618 | ||
9b174d88 | 619 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
620 | } |
621 | ||
53cf5275 | 622 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 623 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
624 | { |
625 | struct net_device *dev; | |
dc01e7d3 | 626 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
627 | struct net *net = sock_net(sk); |
628 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 629 | __be16 port = inet_sk(sk)->inet_sport; |
dc01e7d3 OG |
630 | int err; |
631 | ||
632 | if (sa_family == AF_INET) { | |
633 | err = udp_add_offload(&vs->udp_offloads); | |
634 | if (err) | |
635 | pr_warn("vxlan: udp_add_offload failed with status %d\n", err); | |
636 | } | |
53cf5275 JG |
637 | |
638 | rcu_read_lock(); | |
639 | for_each_netdev_rcu(net, dev) { | |
640 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
641 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
642 | port); | |
643 | } | |
644 | rcu_read_unlock(); | |
645 | } | |
646 | ||
647 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 648 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
649 | { |
650 | struct net_device *dev; | |
dc01e7d3 | 651 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
652 | struct net *net = sock_net(sk); |
653 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 654 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
655 | |
656 | rcu_read_lock(); | |
657 | for_each_netdev_rcu(net, dev) { | |
658 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
659 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
660 | port); | |
661 | } | |
662 | rcu_read_unlock(); | |
dc01e7d3 OG |
663 | |
664 | if (sa_family == AF_INET) | |
665 | udp_del_offload(&vs->udp_offloads); | |
53cf5275 JG |
666 | } |
667 | ||
d342894c | 668 | /* Add new entry to forwarding table -- assumes lock held */ |
669 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 670 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 671 | __u16 state, __u16 flags, |
73cf3317 | 672 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 673 | __u8 ndm_flags) |
d342894c | 674 | { |
9e4b93f9 | 675 | struct vxlan_rdst *rd = NULL; |
d342894c | 676 | struct vxlan_fdb *f; |
677 | int notify = 0; | |
678 | ||
014be2c8 | 679 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 680 | if (f) { |
681 | if (flags & NLM_F_EXCL) { | |
682 | netdev_dbg(vxlan->dev, | |
683 | "lost race to create %pM\n", mac); | |
684 | return -EEXIST; | |
685 | } | |
686 | if (f->state != state) { | |
687 | f->state = state; | |
688 | f->updated = jiffies; | |
689 | notify = 1; | |
690 | } | |
ae884082 DS |
691 | if (f->flags != ndm_flags) { |
692 | f->flags = ndm_flags; | |
693 | f->updated = jiffies; | |
694 | notify = 1; | |
695 | } | |
906dc186 TR |
696 | if ((flags & NLM_F_REPLACE)) { |
697 | /* Only change unicasts */ | |
698 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
699 | is_zero_ether_addr(f->eth_addr))) { | |
60840429 | 700 | notify |= vxlan_fdb_replace(f, ip, port, vni, |
906dc186 | 701 | ifindex); |
906dc186 TR |
702 | } else |
703 | return -EOPNOTSUPP; | |
704 | } | |
6681712d | 705 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
706 | (is_multicast_ether_addr(f->eth_addr) || |
707 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
708 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
709 | &rd); | |
6681712d DS |
710 | |
711 | if (rc < 0) | |
712 | return rc; | |
713 | notify |= rc; | |
714 | } | |
d342894c | 715 | } else { |
716 | if (!(flags & NLM_F_CREATE)) | |
717 | return -ENOENT; | |
718 | ||
0dfbdf41 TG |
719 | if (vxlan->cfg.addrmax && |
720 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
d342894c | 721 | return -ENOSPC; |
722 | ||
906dc186 TR |
723 | /* Disallow replace to add a multicast entry */ |
724 | if ((flags & NLM_F_REPLACE) && | |
725 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
726 | return -EOPNOTSUPP; | |
727 | ||
e4c7ed41 | 728 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 729 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
730 | if (!f) | |
731 | return -ENOMEM; | |
732 | ||
733 | notify = 1; | |
d342894c | 734 | f->state = state; |
ae884082 | 735 | f->flags = ndm_flags; |
d342894c | 736 | f->updated = f->used = jiffies; |
3e61aa8f | 737 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 738 | memcpy(f->eth_addr, mac, ETH_ALEN); |
739 | ||
9e4b93f9 | 740 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 741 | |
d342894c | 742 | ++vxlan->addrcnt; |
743 | hlist_add_head_rcu(&f->hlist, | |
744 | vxlan_fdb_head(vxlan, mac)); | |
745 | } | |
746 | ||
9e4b93f9 ND |
747 | if (notify) { |
748 | if (rd == NULL) | |
749 | rd = first_remote_rtnl(f); | |
750 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
751 | } | |
d342894c | 752 | |
753 | return 0; | |
754 | } | |
755 | ||
6706c82e | 756 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
757 | { |
758 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 759 | struct vxlan_rdst *rd, *nd; |
6681712d | 760 | |
3e61aa8f | 761 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 762 | kfree(rd); |
6681712d DS |
763 | kfree(f); |
764 | } | |
765 | ||
d342894c | 766 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
767 | { | |
768 | netdev_dbg(vxlan->dev, | |
769 | "delete %pM\n", f->eth_addr); | |
770 | ||
771 | --vxlan->addrcnt; | |
9e4b93f9 | 772 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 773 | |
774 | hlist_del_rcu(&f->hlist); | |
6681712d | 775 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 776 | } |
777 | ||
f0b074be | 778 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
e4c7ed41 | 779 | union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex) |
d342894c | 780 | { |
6681712d | 781 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 782 | int err; |
d342894c | 783 | |
f0b074be | 784 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
785 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
786 | if (err) | |
787 | return err; | |
f0b074be | 788 | } else { |
e4c7ed41 CW |
789 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
790 | if (remote->sa.sa_family == AF_INET) { | |
791 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
792 | ip->sa.sa_family = AF_INET; | |
793 | #if IS_ENABLED(CONFIG_IPV6) | |
794 | } else { | |
795 | ip->sin6.sin6_addr = in6addr_any; | |
796 | ip->sa.sa_family = AF_INET6; | |
797 | #endif | |
798 | } | |
f0b074be | 799 | } |
d342894c | 800 | |
6681712d | 801 | if (tb[NDA_PORT]) { |
73cf3317 | 802 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 803 | return -EINVAL; |
f0b074be MR |
804 | *port = nla_get_be16(tb[NDA_PORT]); |
805 | } else { | |
0dfbdf41 | 806 | *port = vxlan->cfg.dst_port; |
f0b074be | 807 | } |
6681712d DS |
808 | |
809 | if (tb[NDA_VNI]) { | |
810 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
811 | return -EINVAL; | |
f0b074be MR |
812 | *vni = nla_get_u32(tb[NDA_VNI]); |
813 | } else { | |
814 | *vni = vxlan->default_dst.remote_vni; | |
815 | } | |
6681712d DS |
816 | |
817 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 818 | struct net_device *tdev; |
6681712d DS |
819 | |
820 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
821 | return -EINVAL; | |
f0b074be | 822 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 823 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 824 | if (!tdev) |
6681712d | 825 | return -EADDRNOTAVAIL; |
f0b074be MR |
826 | } else { |
827 | *ifindex = 0; | |
828 | } | |
829 | ||
830 | return 0; | |
831 | } | |
832 | ||
833 | /* Add static entry (via netlink) */ | |
834 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
835 | struct net_device *dev, | |
f6f6424b | 836 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
837 | { |
838 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
839 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 840 | union vxlan_addr ip; |
f0b074be MR |
841 | __be16 port; |
842 | u32 vni, ifindex; | |
843 | int err; | |
844 | ||
845 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
846 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
847 | ndm->ndm_state); | |
848 | return -EINVAL; | |
849 | } | |
850 | ||
851 | if (tb[NDA_DST] == NULL) | |
852 | return -EINVAL; | |
853 | ||
854 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
855 | if (err) | |
856 | return err; | |
6681712d | 857 | |
5933a7bb MR |
858 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
859 | return -EAFNOSUPPORT; | |
860 | ||
d342894c | 861 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 862 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 863 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 864 | spin_unlock_bh(&vxlan->hash_lock); |
865 | ||
866 | return err; | |
867 | } | |
868 | ||
869 | /* Delete entry (via netlink) */ | |
1690be63 VY |
870 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
871 | struct net_device *dev, | |
f6f6424b | 872 | const unsigned char *addr, u16 vid) |
d342894c | 873 | { |
874 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
875 | struct vxlan_fdb *f; | |
bc7892ba | 876 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 877 | union vxlan_addr ip; |
bc7892ba MR |
878 | __be16 port; |
879 | u32 vni, ifindex; | |
880 | int err; | |
881 | ||
882 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
883 | if (err) | |
884 | return err; | |
885 | ||
886 | err = -ENOENT; | |
d342894c | 887 | |
888 | spin_lock_bh(&vxlan->hash_lock); | |
889 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
890 | if (!f) |
891 | goto out; | |
892 | ||
e4c7ed41 CW |
893 | if (!vxlan_addr_any(&ip)) { |
894 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
895 | if (!rd) |
896 | goto out; | |
897 | } | |
898 | ||
899 | err = 0; | |
900 | ||
901 | /* remove a destination if it's not the only one on the list, | |
902 | * otherwise destroy the fdb entry | |
903 | */ | |
904 | if (rd && !list_is_singular(&f->remotes)) { | |
905 | list_del_rcu(&rd->list); | |
9e4b93f9 | 906 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 907 | kfree_rcu(rd, rcu); |
bc7892ba | 908 | goto out; |
d342894c | 909 | } |
bc7892ba MR |
910 | |
911 | vxlan_fdb_destroy(vxlan, f); | |
912 | ||
913 | out: | |
d342894c | 914 | spin_unlock_bh(&vxlan->hash_lock); |
915 | ||
916 | return err; | |
917 | } | |
918 | ||
919 | /* Dump forwarding table */ | |
920 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 JHS |
921 | struct net_device *dev, |
922 | struct net_device *filter_dev, int idx) | |
d342894c | 923 | { |
924 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
925 | unsigned int h; | |
926 | ||
927 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
928 | struct vxlan_fdb *f; | |
d342894c | 929 | int err; |
930 | ||
b67bfe0d | 931 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 932 | struct vxlan_rdst *rd; |
6681712d | 933 | |
3e61aa8f SH |
934 | if (idx < cb->args[0]) |
935 | goto skip; | |
936 | ||
937 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
938 | err = vxlan_fdb_info(skb, vxlan, f, |
939 | NETLINK_CB(cb->skb).portid, | |
940 | cb->nlh->nlmsg_seq, | |
941 | RTM_NEWNEIGH, | |
942 | NLM_F_MULTI, rd); | |
943 | if (err < 0) | |
3e61aa8f | 944 | goto out; |
6681712d | 945 | } |
3e61aa8f SH |
946 | skip: |
947 | ++idx; | |
d342894c | 948 | } |
949 | } | |
3e61aa8f | 950 | out: |
d342894c | 951 | return idx; |
952 | } | |
953 | ||
954 | /* Watch incoming packets to learn mapping between Ethernet address | |
955 | * and Tunnel endpoint. | |
c4b49512 | 956 | * Return true if packet is bogus and should be dropped. |
d342894c | 957 | */ |
26a41ae6 | 958 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 959 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 960 | { |
961 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
962 | struct vxlan_fdb *f; | |
d342894c | 963 | |
964 | f = vxlan_find_mac(vxlan, src_mac); | |
965 | if (likely(f)) { | |
5ca5461c | 966 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 967 | |
e4c7ed41 | 968 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 969 | return false; |
970 | ||
971 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 972 | if (f->state & NUD_NOARP) |
26a41ae6 | 973 | return true; |
d342894c | 974 | |
975 | if (net_ratelimit()) | |
976 | netdev_info(dev, | |
e4c7ed41 | 977 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 978 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 979 | |
e4c7ed41 | 980 | rdst->remote_ip = *src_ip; |
d342894c | 981 | f->updated = jiffies; |
9e4b93f9 | 982 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 983 | } else { |
984 | /* learned new entry */ | |
985 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 986 | |
987 | /* close off race between vxlan_flush and incoming packets */ | |
988 | if (netif_running(dev)) | |
989 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
990 | NUD_REACHABLE, | |
991 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 992 | vxlan->cfg.dst_port, |
3bf74b1a | 993 | vxlan->default_dst.remote_vni, |
994 | 0, NTF_SELF); | |
d342894c | 995 | spin_unlock(&vxlan->hash_lock); |
996 | } | |
26a41ae6 | 997 | |
998 | return false; | |
d342894c | 999 | } |
1000 | ||
d342894c | 1001 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1002 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1003 | { |
553675fb | 1004 | struct vxlan_dev *vxlan; |
d342894c | 1005 | |
95ab0991 G |
1006 | /* The vxlan_sock is only used by dev, leaving group has |
1007 | * no effect on other vxlan devices. | |
1008 | */ | |
1009 | if (atomic_read(&dev->vn_sock->refcnt) == 1) | |
1010 | return false; | |
1011 | ||
553675fb | 1012 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1013 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1014 | continue; |
d342894c | 1015 | |
95ab0991 G |
1016 | if (vxlan->vn_sock != dev->vn_sock) |
1017 | continue; | |
1018 | ||
1019 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1020 | &dev->default_dst.remote_ip)) | |
1021 | continue; | |
1022 | ||
1023 | if (vxlan->default_dst.remote_ifindex != | |
1024 | dev->default_dst.remote_ifindex) | |
1025 | continue; | |
1026 | ||
1027 | return true; | |
553675fb | 1028 | } |
d342894c | 1029 | |
1030 | return false; | |
1031 | } | |
1032 | ||
614732ea | 1033 | static void vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 1034 | { |
53cf5275 JG |
1035 | struct sock *sk = vs->sock->sk; |
1036 | struct net *net = sock_net(sk); | |
1037 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
012a5729 | 1038 | |
7c47cedf SH |
1039 | if (!atomic_dec_and_test(&vs->refcnt)) |
1040 | return; | |
d342894c | 1041 | |
1c51a915 | 1042 | spin_lock(&vn->sock_lock); |
7c47cedf | 1043 | hlist_del_rcu(&vs->hlist); |
dc01e7d3 | 1044 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1045 | spin_unlock(&vn->sock_lock); |
1046 | ||
7c47cedf | 1047 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 1048 | } |
1049 | ||
56ef9c90 | 1050 | /* Update multicast group membership when first VNI on |
c4b49512 | 1051 | * multicast address is brought up |
7c47cedf | 1052 | */ |
56ef9c90 | 1053 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1054 | { |
7c47cedf SH |
1055 | struct vxlan_sock *vs = vxlan->vn_sock; |
1056 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1057 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1058 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1059 | int ret = -EINVAL; |
d342894c | 1060 | |
d342894c | 1061 | lock_sock(sk); |
e4c7ed41 CW |
1062 | if (ip->sa.sa_family == AF_INET) { |
1063 | struct ip_mreqn mreq = { | |
1064 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1065 | .imr_ifindex = ifindex, | |
1066 | }; | |
1067 | ||
56ef9c90 | 1068 | ret = ip_mc_join_group(sk, &mreq); |
e4c7ed41 CW |
1069 | #if IS_ENABLED(CONFIG_IPV6) |
1070 | } else { | |
56ef9c90 MRL |
1071 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1072 | &ip->sin6.sin6_addr); | |
e4c7ed41 CW |
1073 | #endif |
1074 | } | |
3fc2de2f | 1075 | release_sock(sk); |
1076 | ||
56ef9c90 | 1077 | return ret; |
3fc2de2f | 1078 | } |
1079 | ||
1080 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1081 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1082 | { |
3fc2de2f | 1083 | struct vxlan_sock *vs = vxlan->vn_sock; |
1084 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1085 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1086 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1087 | int ret = -EINVAL; |
3fc2de2f | 1088 | |
1089 | lock_sock(sk); | |
e4c7ed41 CW |
1090 | if (ip->sa.sa_family == AF_INET) { |
1091 | struct ip_mreqn mreq = { | |
1092 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1093 | .imr_ifindex = ifindex, | |
1094 | }; | |
1095 | ||
56ef9c90 | 1096 | ret = ip_mc_leave_group(sk, &mreq); |
e4c7ed41 CW |
1097 | #if IS_ENABLED(CONFIG_IPV6) |
1098 | } else { | |
56ef9c90 MRL |
1099 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1100 | &ip->sin6.sin6_addr); | |
e4c7ed41 CW |
1101 | #endif |
1102 | } | |
d342894c | 1103 | release_sock(sk); |
d342894c | 1104 | |
56ef9c90 | 1105 | return ret; |
d342894c | 1106 | } |
1107 | ||
dfd8645e | 1108 | static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh, |
0ace2ca8 | 1109 | size_t hdrlen, u32 data, bool nopartial) |
dfd8645e TH |
1110 | { |
1111 | size_t start, offset, plen; | |
dfd8645e | 1112 | |
dfd8645e TH |
1113 | start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; |
1114 | offset = start + ((data & VXLAN_RCO_UDP) ? | |
1115 | offsetof(struct udphdr, check) : | |
1116 | offsetof(struct tcphdr, check)); | |
1117 | ||
1118 | plen = hdrlen + offset + sizeof(u16); | |
1119 | ||
1120 | if (!pskb_may_pull(skb, plen)) | |
1121 | return NULL; | |
1122 | ||
1123 | vh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
1124 | ||
0ace2ca8 TH |
1125 | skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset, |
1126 | nopartial); | |
dfd8645e TH |
1127 | |
1128 | return vh; | |
1129 | } | |
1130 | ||
614732ea TG |
1131 | static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb, |
1132 | struct vxlan_metadata *md, u32 vni, | |
1133 | struct metadata_dst *tun_dst) | |
1134 | { | |
1135 | struct iphdr *oip = NULL; | |
1136 | struct ipv6hdr *oip6 = NULL; | |
1137 | struct vxlan_dev *vxlan; | |
1138 | struct pcpu_sw_netstats *stats; | |
1139 | union vxlan_addr saddr; | |
1140 | int err = 0; | |
1141 | union vxlan_addr *remote_ip; | |
1142 | ||
1143 | /* For flow based devices, map all packets to VNI 0 */ | |
1144 | if (vs->flags & VXLAN_F_FLOW_BASED) | |
1145 | vni = 0; | |
1146 | ||
1147 | /* Is this VNI defined? */ | |
1148 | vxlan = vxlan_vs_find_vni(vs, vni); | |
1149 | if (!vxlan) | |
1150 | goto drop; | |
1151 | ||
1152 | remote_ip = &vxlan->default_dst.remote_ip; | |
1153 | skb_reset_mac_header(skb); | |
1154 | skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev))); | |
1155 | skb->protocol = eth_type_trans(skb, vxlan->dev); | |
1156 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1157 | ||
1158 | /* Ignore packet loops (and multicast echo) */ | |
1159 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1160 | goto drop; | |
1161 | ||
1162 | /* Re-examine inner Ethernet packet */ | |
1163 | if (remote_ip->sa.sa_family == AF_INET) { | |
1164 | oip = ip_hdr(skb); | |
1165 | saddr.sin.sin_addr.s_addr = oip->saddr; | |
1166 | saddr.sa.sa_family = AF_INET; | |
1167 | #if IS_ENABLED(CONFIG_IPV6) | |
1168 | } else { | |
1169 | oip6 = ipv6_hdr(skb); | |
1170 | saddr.sin6.sin6_addr = oip6->saddr; | |
1171 | saddr.sa.sa_family = AF_INET6; | |
1172 | #endif | |
1173 | } | |
1174 | ||
1175 | if (tun_dst) { | |
1176 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
1177 | tun_dst = NULL; | |
1178 | } | |
1179 | ||
1180 | if ((vxlan->flags & VXLAN_F_LEARN) && | |
1181 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) | |
1182 | goto drop; | |
1183 | ||
1184 | skb_reset_network_header(skb); | |
1185 | /* In flow-based mode, GBP is carried in dst_metadata */ | |
1186 | if (!(vs->flags & VXLAN_F_FLOW_BASED)) | |
1187 | skb->mark = md->gbp; | |
1188 | ||
1189 | if (oip6) | |
1190 | err = IP6_ECN_decapsulate(oip6, skb); | |
1191 | if (oip) | |
1192 | err = IP_ECN_decapsulate(oip, skb); | |
1193 | ||
1194 | if (unlikely(err)) { | |
1195 | if (log_ecn_error) { | |
1196 | if (oip6) | |
1197 | net_info_ratelimited("non-ECT from %pI6\n", | |
1198 | &oip6->saddr); | |
1199 | if (oip) | |
1200 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1201 | &oip->saddr, oip->tos); | |
1202 | } | |
1203 | if (err > 1) { | |
1204 | ++vxlan->dev->stats.rx_frame_errors; | |
1205 | ++vxlan->dev->stats.rx_errors; | |
1206 | goto drop; | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | stats = this_cpu_ptr(vxlan->dev->tstats); | |
1211 | u64_stats_update_begin(&stats->syncp); | |
1212 | stats->rx_packets++; | |
1213 | stats->rx_bytes += skb->len; | |
1214 | u64_stats_update_end(&stats->syncp); | |
1215 | ||
1216 | netif_rx(skb); | |
1217 | ||
1218 | return; | |
1219 | drop: | |
1220 | if (tun_dst) | |
1221 | dst_release((struct dst_entry *)tun_dst); | |
1222 | ||
1223 | /* Consume bad packet */ | |
1224 | kfree_skb(skb); | |
1225 | } | |
1226 | ||
d342894c | 1227 | /* Callback from net/ipv4/udp.c to receive packets */ |
1228 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
1229 | { | |
ee122c79 TG |
1230 | struct metadata_dst *tun_dst = NULL; |
1231 | struct ip_tunnel_info *info; | |
5cfccc5a | 1232 | struct vxlan_sock *vs; |
d342894c | 1233 | struct vxlanhdr *vxh; |
3bf39475 | 1234 | u32 flags, vni; |
ee122c79 TG |
1235 | struct vxlan_metadata _md; |
1236 | struct vxlan_metadata *md = &_md; | |
d342894c | 1237 | |
d342894c | 1238 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1239 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 1240 | goto error; |
1241 | ||
7ce04758 | 1242 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); |
3bf39475 TH |
1243 | flags = ntohl(vxh->vx_flags); |
1244 | vni = ntohl(vxh->vx_vni); | |
1245 | ||
1246 | if (flags & VXLAN_HF_VNI) { | |
1247 | flags &= ~VXLAN_HF_VNI; | |
1248 | } else { | |
1249 | /* VNI flag always required to be set */ | |
1250 | goto bad_flags; | |
d342894c | 1251 | } |
1252 | ||
5cfccc5a PS |
1253 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
1254 | goto drop; | |
dfd8645e | 1255 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); |
5cfccc5a | 1256 | |
559835ea | 1257 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1258 | if (!vs) |
d342894c | 1259 | goto drop; |
d342894c | 1260 | |
dfd8645e | 1261 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { |
0ace2ca8 TH |
1262 | vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni, |
1263 | !!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
1264 | if (!vxh) |
1265 | goto drop; | |
1266 | ||
1267 | flags &= ~VXLAN_HF_RCO; | |
40fb70f3 | 1268 | vni &= VXLAN_VNI_MASK; |
dfd8645e TH |
1269 | } |
1270 | ||
ee122c79 TG |
1271 | if (vxlan_collect_metadata(vs)) { |
1272 | const struct iphdr *iph = ip_hdr(skb); | |
1273 | ||
1274 | tun_dst = metadata_dst_alloc(sizeof(*md), GFP_ATOMIC); | |
1275 | if (!tun_dst) | |
1276 | goto drop; | |
1277 | ||
1278 | info = &tun_dst->u.tun_info; | |
1279 | info->key.ipv4_src = iph->saddr; | |
1280 | info->key.ipv4_dst = iph->daddr; | |
1281 | info->key.ipv4_tos = iph->tos; | |
1282 | info->key.ipv4_ttl = iph->ttl; | |
1283 | info->key.tp_src = udp_hdr(skb)->source; | |
1284 | info->key.tp_dst = udp_hdr(skb)->dest; | |
1285 | ||
1286 | info->mode = IP_TUNNEL_INFO_RX; | |
1287 | info->key.tun_flags = TUNNEL_KEY; | |
1288 | info->key.tun_id = cpu_to_be64(vni >> 8); | |
1289 | if (udp_hdr(skb)->check != 0) | |
1290 | info->key.tun_flags |= TUNNEL_CSUM; | |
1291 | ||
1292 | md = ip_tunnel_info_opts(info, sizeof(*md)); | |
ee122c79 TG |
1293 | } else { |
1294 | memset(md, 0, sizeof(*md)); | |
1295 | } | |
1296 | ||
3511494c TG |
1297 | /* For backwards compatibility, only allow reserved fields to be |
1298 | * used by VXLAN extensions if explicitly requested. | |
1299 | */ | |
1300 | if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) { | |
1301 | struct vxlanhdr_gbp *gbp; | |
1302 | ||
1303 | gbp = (struct vxlanhdr_gbp *)vxh; | |
ee122c79 TG |
1304 | md->gbp = ntohs(gbp->policy_id); |
1305 | ||
1306 | if (tun_dst) | |
1307 | info->key.tun_flags |= TUNNEL_VXLAN_OPT; | |
3511494c TG |
1308 | |
1309 | if (gbp->dont_learn) | |
ee122c79 | 1310 | md->gbp |= VXLAN_GBP_DONT_LEARN; |
3511494c TG |
1311 | |
1312 | if (gbp->policy_applied) | |
ee122c79 | 1313 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; |
3511494c TG |
1314 | |
1315 | flags &= ~VXLAN_GBP_USED_BITS; | |
1316 | } | |
1317 | ||
40fb70f3 | 1318 | if (flags || vni & ~VXLAN_VNI_MASK) { |
3bf39475 TH |
1319 | /* If there are any unprocessed flags remaining treat |
1320 | * this as a malformed packet. This behavior diverges from | |
1321 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1322 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1323 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1324 | * is more robust and provides a little more security in |
1325 | * adding extensions to VXLAN. | |
1326 | */ | |
1327 | ||
1328 | goto bad_flags; | |
1329 | } | |
1330 | ||
614732ea | 1331 | vxlan_rcv(vs, skb, md, vni >> 8, tun_dst); |
5cfccc5a PS |
1332 | return 0; |
1333 | ||
1334 | drop: | |
1335 | /* Consume bad packet */ | |
1336 | kfree_skb(skb); | |
1337 | return 0; | |
1338 | ||
3bf39475 TH |
1339 | bad_flags: |
1340 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1341 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
1342 | ||
5cfccc5a | 1343 | error: |
ee122c79 TG |
1344 | if (tun_dst) |
1345 | dst_release((struct dst_entry *)tun_dst); | |
1346 | ||
5cfccc5a PS |
1347 | /* Return non vxlan pkt */ |
1348 | return 1; | |
1349 | } | |
1350 | ||
e4f67add DS |
1351 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1352 | { | |
1353 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1354 | struct arphdr *parp; | |
1355 | u8 *arpptr, *sha; | |
1356 | __be32 sip, tip; | |
1357 | struct neighbour *n; | |
1358 | ||
1359 | if (dev->flags & IFF_NOARP) | |
1360 | goto out; | |
1361 | ||
1362 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1363 | dev->stats.tx_dropped++; | |
1364 | goto out; | |
1365 | } | |
1366 | parp = arp_hdr(skb); | |
1367 | ||
1368 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1369 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1370 | parp->ar_pro != htons(ETH_P_IP) || | |
1371 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1372 | parp->ar_hln != dev->addr_len || | |
1373 | parp->ar_pln != 4) | |
1374 | goto out; | |
1375 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1376 | sha = arpptr; | |
1377 | arpptr += dev->addr_len; /* sha */ | |
1378 | memcpy(&sip, arpptr, sizeof(sip)); | |
1379 | arpptr += sizeof(sip); | |
1380 | arpptr += dev->addr_len; /* tha */ | |
1381 | memcpy(&tip, arpptr, sizeof(tip)); | |
1382 | ||
1383 | if (ipv4_is_loopback(tip) || | |
1384 | ipv4_is_multicast(tip)) | |
1385 | goto out; | |
1386 | ||
1387 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1388 | ||
1389 | if (n) { | |
e4f67add DS |
1390 | struct vxlan_fdb *f; |
1391 | struct sk_buff *reply; | |
1392 | ||
1393 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1394 | neigh_release(n); | |
1395 | goto out; | |
1396 | } | |
1397 | ||
1398 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1399 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1400 | /* bridge-local neighbor */ |
1401 | neigh_release(n); | |
1402 | goto out; | |
1403 | } | |
1404 | ||
1405 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1406 | n->ha, sha); | |
1407 | ||
1408 | neigh_release(n); | |
1409 | ||
7346135d DS |
1410 | if (reply == NULL) |
1411 | goto out; | |
1412 | ||
e4f67add DS |
1413 | skb_reset_mac_header(reply); |
1414 | __skb_pull(reply, skb_network_offset(reply)); | |
1415 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1416 | reply->pkt_type = PACKET_HOST; | |
1417 | ||
1418 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1419 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1420 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1421 | union vxlan_addr ipa = { | |
1422 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1423 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1424 | }; |
1425 | ||
1426 | vxlan_ip_miss(dev, &ipa); | |
1427 | } | |
e4f67add DS |
1428 | out: |
1429 | consume_skb(skb); | |
1430 | return NETDEV_TX_OK; | |
1431 | } | |
1432 | ||
f564f45c | 1433 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1434 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1435 | struct neighbour *n, bool isrouter) | |
1436 | { | |
1437 | struct net_device *dev = request->dev; | |
1438 | struct sk_buff *reply; | |
1439 | struct nd_msg *ns, *na; | |
1440 | struct ipv6hdr *pip6; | |
1441 | u8 *daddr; | |
1442 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1443 | int ns_olen; | |
1444 | int i, len; | |
1445 | ||
1446 | if (dev == NULL) | |
1447 | return NULL; | |
1448 | ||
1449 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1450 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1451 | reply = alloc_skb(len, GFP_ATOMIC); | |
1452 | if (reply == NULL) | |
1453 | return NULL; | |
1454 | ||
1455 | reply->protocol = htons(ETH_P_IPV6); | |
1456 | reply->dev = dev; | |
1457 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1458 | skb_push(reply, sizeof(struct ethhdr)); | |
1459 | skb_set_mac_header(reply, 0); | |
1460 | ||
1461 | ns = (struct nd_msg *)skb_transport_header(request); | |
1462 | ||
1463 | daddr = eth_hdr(request)->h_source; | |
1464 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1465 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1466 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1467 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1468 | break; | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | /* Ethernet header */ | |
1473 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1474 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1475 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1476 | reply->protocol = htons(ETH_P_IPV6); | |
1477 | ||
1478 | skb_pull(reply, sizeof(struct ethhdr)); | |
1479 | skb_set_network_header(reply, 0); | |
1480 | skb_put(reply, sizeof(struct ipv6hdr)); | |
1481 | ||
1482 | /* IPv6 header */ | |
1483 | ||
1484 | pip6 = ipv6_hdr(reply); | |
1485 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1486 | pip6->version = 6; | |
1487 | pip6->priority = ipv6_hdr(request)->priority; | |
1488 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1489 | pip6->hop_limit = 255; | |
1490 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1491 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1492 | ||
1493 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
1494 | skb_set_transport_header(reply, 0); | |
1495 | ||
1496 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1497 | ||
1498 | /* Neighbor Advertisement */ | |
1499 | memset(na, 0, sizeof(*na)+na_olen); | |
1500 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1501 | na->icmph.icmp6_router = isrouter; | |
1502 | na->icmph.icmp6_override = 1; | |
1503 | na->icmph.icmp6_solicited = 1; | |
1504 | na->target = ns->target; | |
1505 | ether_addr_copy(&na->opt[2], n->ha); | |
1506 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1507 | na->opt[1] = na_olen >> 3; | |
1508 | ||
1509 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1510 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1511 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1512 | ||
1513 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1514 | ||
1515 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1516 | ||
1517 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1518 | ||
1519 | return reply; | |
1520 | } | |
1521 | ||
f564f45c CW |
1522 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1523 | { | |
1524 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1525 | struct nd_msg *msg; |
f564f45c CW |
1526 | const struct ipv6hdr *iphdr; |
1527 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1528 | struct neighbour *n; |
1529 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1530 | |
1531 | in6_dev = __in6_dev_get(dev); | |
1532 | if (!in6_dev) | |
1533 | goto out; | |
1534 | ||
f564f45c CW |
1535 | iphdr = ipv6_hdr(skb); |
1536 | saddr = &iphdr->saddr; | |
1537 | daddr = &iphdr->daddr; | |
1538 | ||
f564f45c CW |
1539 | msg = (struct nd_msg *)skb_transport_header(skb); |
1540 | if (msg->icmph.icmp6_code != 0 || | |
1541 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1542 | goto out; | |
1543 | ||
4b29dba9 DS |
1544 | if (ipv6_addr_loopback(daddr) || |
1545 | ipv6_addr_is_multicast(&msg->target)) | |
1546 | goto out; | |
1547 | ||
1548 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1549 | |
1550 | if (n) { | |
1551 | struct vxlan_fdb *f; | |
4b29dba9 | 1552 | struct sk_buff *reply; |
f564f45c CW |
1553 | |
1554 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1555 | neigh_release(n); | |
1556 | goto out; | |
1557 | } | |
1558 | ||
1559 | f = vxlan_find_mac(vxlan, n->ha); | |
1560 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1561 | /* bridge-local neighbor */ | |
1562 | neigh_release(n); | |
1563 | goto out; | |
1564 | } | |
1565 | ||
4b29dba9 DS |
1566 | reply = vxlan_na_create(skb, n, |
1567 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1568 | ||
f564f45c | 1569 | neigh_release(n); |
4b29dba9 DS |
1570 | |
1571 | if (reply == NULL) | |
1572 | goto out; | |
1573 | ||
1574 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1575 | dev->stats.rx_dropped++; | |
1576 | ||
f564f45c | 1577 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1578 | union vxlan_addr ipa = { |
1579 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1580 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1581 | }; |
1582 | ||
f564f45c CW |
1583 | vxlan_ip_miss(dev, &ipa); |
1584 | } | |
1585 | ||
1586 | out: | |
1587 | consume_skb(skb); | |
1588 | return NETDEV_TX_OK; | |
1589 | } | |
1590 | #endif | |
1591 | ||
e4f67add DS |
1592 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1593 | { | |
1594 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1595 | struct neighbour *n; | |
e4f67add DS |
1596 | |
1597 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1598 | return false; | |
1599 | ||
1600 | n = NULL; | |
1601 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1602 | case ETH_P_IP: | |
e15a00aa CW |
1603 | { |
1604 | struct iphdr *pip; | |
1605 | ||
e4f67add DS |
1606 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1607 | return false; | |
1608 | pip = ip_hdr(skb); | |
1609 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1610 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1611 | union vxlan_addr ipa = { | |
1612 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 1613 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1614 | }; |
1615 | ||
1616 | vxlan_ip_miss(dev, &ipa); | |
1617 | return false; | |
1618 | } | |
1619 | ||
e4f67add | 1620 | break; |
e15a00aa CW |
1621 | } |
1622 | #if IS_ENABLED(CONFIG_IPV6) | |
1623 | case ETH_P_IPV6: | |
1624 | { | |
1625 | struct ipv6hdr *pip6; | |
1626 | ||
1627 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1628 | return false; | |
1629 | pip6 = ipv6_hdr(skb); | |
1630 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1631 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1632 | union vxlan_addr ipa = { | |
1633 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 1634 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
1635 | }; |
1636 | ||
1637 | vxlan_ip_miss(dev, &ipa); | |
1638 | return false; | |
1639 | } | |
1640 | ||
1641 | break; | |
1642 | } | |
1643 | #endif | |
e4f67add DS |
1644 | default: |
1645 | return false; | |
1646 | } | |
1647 | ||
1648 | if (n) { | |
1649 | bool diff; | |
1650 | ||
7367d0b5 | 1651 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1652 | if (diff) { |
1653 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1654 | dev->addr_len); | |
1655 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1656 | } | |
1657 | neigh_release(n); | |
1658 | return diff; | |
e4c7ed41 CW |
1659 | } |
1660 | ||
e4f67add DS |
1661 | return false; |
1662 | } | |
1663 | ||
af33c1ad | 1664 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
1665 | struct vxlan_metadata *md) |
1666 | { | |
1667 | struct vxlanhdr_gbp *gbp; | |
1668 | ||
db79a621 TG |
1669 | if (!md->gbp) |
1670 | return; | |
1671 | ||
3511494c TG |
1672 | gbp = (struct vxlanhdr_gbp *)vxh; |
1673 | vxh->vx_flags |= htonl(VXLAN_HF_GBP); | |
1674 | ||
1675 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
1676 | gbp->dont_learn = 1; | |
1677 | ||
1678 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
1679 | gbp->policy_applied = 1; | |
1680 | ||
1681 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
1682 | } | |
1683 | ||
e4c7ed41 | 1684 | #if IS_ENABLED(CONFIG_IPV6) |
79b16aad DM |
1685 | static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
1686 | struct sk_buff *skb, | |
e4c7ed41 CW |
1687 | struct net_device *dev, struct in6_addr *saddr, |
1688 | struct in6_addr *daddr, __u8 prio, __u8 ttl, | |
6b6948dd | 1689 | __be16 src_port, __be16 dst_port, __be32 vni, |
af33c1ad | 1690 | struct vxlan_metadata *md, bool xnet, u32 vxflags) |
e4c7ed41 | 1691 | { |
e4c7ed41 | 1692 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
1693 | int min_headroom; |
1694 | int err; | |
af33c1ad | 1695 | bool udp_sum = !(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX); |
dfd8645e TH |
1696 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1697 | u16 hdrlen = sizeof(struct vxlanhdr); | |
1698 | ||
af33c1ad | 1699 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1700 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1701 | int csum_start = skb_checksum_start_offset(skb); | |
1702 | ||
1703 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1704 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1705 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
1706 | skb->csum_offset == offsetof(struct tcphdr, check))) { | |
1707 | udp_sum = false; | |
1708 | type |= SKB_GSO_TUNNEL_REMCSUM; | |
1709 | } | |
1710 | } | |
e4c7ed41 | 1711 | |
f01ec1c0 | 1712 | skb_scrub_packet(skb, xnet); |
963a88b3 | 1713 | |
e4c7ed41 CW |
1714 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
1715 | + VXLAN_HLEN + sizeof(struct ipv6hdr) | |
df8a39de | 1716 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
e4c7ed41 CW |
1717 | |
1718 | /* Need space for new headers (invalidates iph ptr) */ | |
1719 | err = skb_cow_head(skb, min_headroom); | |
74f47278 PS |
1720 | if (unlikely(err)) { |
1721 | kfree_skb(skb); | |
1722 | goto err; | |
1723 | } | |
e4c7ed41 | 1724 | |
5968250c | 1725 | skb = vlan_hwaccel_push_inside(skb); |
74f47278 PS |
1726 | if (WARN_ON(!skb)) { |
1727 | err = -ENOMEM; | |
1728 | goto err; | |
1729 | } | |
e4c7ed41 | 1730 | |
b736a623 JG |
1731 | skb = iptunnel_handle_offloads(skb, udp_sum, type); |
1732 | if (IS_ERR(skb)) { | |
1733 | err = -EINVAL; | |
1734 | goto err; | |
1735 | } | |
1736 | ||
e4c7ed41 | 1737 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
3bf39475 | 1738 | vxh->vx_flags = htonl(VXLAN_HF_VNI); |
614732ea | 1739 | vxh->vx_vni = vni; |
e4c7ed41 | 1740 | |
dfd8645e TH |
1741 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
1742 | u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> | |
1743 | VXLAN_RCO_SHIFT; | |
1744 | ||
1745 | if (skb->csum_offset == offsetof(struct udphdr, check)) | |
1746 | data |= VXLAN_RCO_UDP; | |
1747 | ||
1748 | vxh->vx_vni |= htonl(data); | |
1749 | vxh->vx_flags |= htonl(VXLAN_HF_RCO); | |
1750 | ||
1751 | if (!skb_is_gso(skb)) { | |
1752 | skb->ip_summed = CHECKSUM_NONE; | |
1753 | skb->encapsulation = 0; | |
1754 | } | |
1755 | } | |
1756 | ||
af33c1ad TH |
1757 | if (vxflags & VXLAN_F_GBP) |
1758 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
3511494c | 1759 | |
996c9fd1 TH |
1760 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
1761 | ||
79b16aad | 1762 | udp_tunnel6_xmit_skb(dst, sk, skb, dev, saddr, daddr, prio, |
d998f8ef | 1763 | ttl, src_port, dst_port, |
af33c1ad | 1764 | !!(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX)); |
e4c7ed41 | 1765 | return 0; |
74f47278 PS |
1766 | err: |
1767 | dst_release(dst); | |
1768 | return err; | |
e4c7ed41 CW |
1769 | } |
1770 | #endif | |
1771 | ||
614732ea TG |
1772 | static int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, |
1773 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, | |
6b6948dd | 1774 | __be16 src_port, __be16 dst_port, __be32 vni, |
614732ea | 1775 | struct vxlan_metadata *md, bool xnet, u32 vxflags) |
49560532 PS |
1776 | { |
1777 | struct vxlanhdr *vxh; | |
649c5b8b | 1778 | int min_headroom; |
49560532 | 1779 | int err; |
af33c1ad | 1780 | bool udp_sum = !!(vxflags & VXLAN_F_UDP_CSUM); |
dfd8645e TH |
1781 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1782 | u16 hdrlen = sizeof(struct vxlanhdr); | |
1783 | ||
af33c1ad | 1784 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1785 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1786 | int csum_start = skb_checksum_start_offset(skb); | |
1787 | ||
1788 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1789 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1790 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
1791 | skb->csum_offset == offsetof(struct tcphdr, check))) { | |
1792 | udp_sum = false; | |
1793 | type |= SKB_GSO_TUNNEL_REMCSUM; | |
1794 | } | |
1795 | } | |
49560532 | 1796 | |
649c5b8b | 1797 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 | 1798 | + VXLAN_HLEN + sizeof(struct iphdr) |
df8a39de | 1799 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
649c5b8b PS |
1800 | |
1801 | /* Need space for new headers (invalidates iph ptr) */ | |
1802 | err = skb_cow_head(skb, min_headroom); | |
74f47278 PS |
1803 | if (unlikely(err)) { |
1804 | kfree_skb(skb); | |
649c5b8b | 1805 | return err; |
74f47278 | 1806 | } |
649c5b8b | 1807 | |
5968250c JP |
1808 | skb = vlan_hwaccel_push_inside(skb); |
1809 | if (WARN_ON(!skb)) | |
1810 | return -ENOMEM; | |
1eaa8178 | 1811 | |
b736a623 JG |
1812 | skb = iptunnel_handle_offloads(skb, udp_sum, type); |
1813 | if (IS_ERR(skb)) | |
1814 | return PTR_ERR(skb); | |
1815 | ||
49560532 | 1816 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
3bf39475 | 1817 | vxh->vx_flags = htonl(VXLAN_HF_VNI); |
614732ea | 1818 | vxh->vx_vni = vni; |
49560532 | 1819 | |
dfd8645e TH |
1820 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
1821 | u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> | |
1822 | VXLAN_RCO_SHIFT; | |
1823 | ||
1824 | if (skb->csum_offset == offsetof(struct udphdr, check)) | |
1825 | data |= VXLAN_RCO_UDP; | |
1826 | ||
1827 | vxh->vx_vni |= htonl(data); | |
1828 | vxh->vx_flags |= htonl(VXLAN_HF_RCO); | |
1829 | ||
1830 | if (!skb_is_gso(skb)) { | |
1831 | skb->ip_summed = CHECKSUM_NONE; | |
1832 | skb->encapsulation = 0; | |
1833 | } | |
1834 | } | |
1835 | ||
af33c1ad TH |
1836 | if (vxflags & VXLAN_F_GBP) |
1837 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
3511494c | 1838 | |
996c9fd1 TH |
1839 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
1840 | ||
79b16aad | 1841 | return udp_tunnel_xmit_skb(rt, sk, skb, src, dst, tos, |
d998f8ef | 1842 | ttl, df, src_port, dst_port, xnet, |
af33c1ad | 1843 | !(vxflags & VXLAN_F_UDP_CSUM)); |
49560532 | 1844 | } |
49560532 | 1845 | |
9dcc71e1 SS |
1846 | /* Bypass encapsulation if the destination is local */ |
1847 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1848 | struct vxlan_dev *dst_vxlan) | |
1849 | { | |
8f84985f | 1850 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1851 | union vxlan_addr loopback; |
1852 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
1853 | struct net_device *dev = skb->dev; |
1854 | int len = skb->len; | |
9dcc71e1 | 1855 | |
8f84985f LR |
1856 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1857 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1858 | skb->pkt_type = PACKET_HOST; |
1859 | skb->encapsulation = 0; | |
1860 | skb->dev = dst_vxlan->dev; | |
1861 | __skb_pull(skb, skb_network_offset(skb)); | |
1862 | ||
e4c7ed41 CW |
1863 | if (remote_ip->sa.sa_family == AF_INET) { |
1864 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1865 | loopback.sa.sa_family = AF_INET; | |
1866 | #if IS_ENABLED(CONFIG_IPV6) | |
1867 | } else { | |
1868 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1869 | loopback.sa.sa_family = AF_INET6; | |
1870 | #endif | |
1871 | } | |
1872 | ||
9dcc71e1 | 1873 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1874 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1875 | |
1876 | u64_stats_update_begin(&tx_stats->syncp); | |
1877 | tx_stats->tx_packets++; | |
ce6502a8 | 1878 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
1879 | u64_stats_update_end(&tx_stats->syncp); |
1880 | ||
1881 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1882 | u64_stats_update_begin(&rx_stats->syncp); | |
1883 | rx_stats->rx_packets++; | |
ce6502a8 | 1884 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
1885 | u64_stats_update_end(&rx_stats->syncp); |
1886 | } else { | |
ce6502a8 | 1887 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
1888 | } |
1889 | } | |
1890 | ||
4ad16930 SH |
1891 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1892 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1893 | { |
3093fbe7 | 1894 | struct ip_tunnel_info *info; |
d342894c | 1895 | struct vxlan_dev *vxlan = netdev_priv(dev); |
79b16aad | 1896 | struct sock *sk = vxlan->vn_sock->sock->sk; |
e4c7ed41 | 1897 | struct rtable *rt = NULL; |
d342894c | 1898 | const struct iphdr *old_iph; |
d342894c | 1899 | struct flowi4 fl4; |
e4c7ed41 | 1900 | union vxlan_addr *dst; |
ee122c79 TG |
1901 | union vxlan_addr remote_ip; |
1902 | struct vxlan_metadata _md; | |
1903 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 1904 | __be16 src_port = 0, dst_port; |
234f5b73 | 1905 | u32 vni; |
d342894c | 1906 | __be16 df = 0; |
1907 | __u8 tos, ttl; | |
0e6fbc5b | 1908 | int err; |
ee122c79 | 1909 | u32 flags = vxlan->flags; |
d342894c | 1910 | |
3093fbe7 TG |
1911 | /* FIXME: Support IPv6 */ |
1912 | info = skb_tunnel_info(skb, AF_INET); | |
1913 | ||
ee122c79 | 1914 | if (rdst) { |
0dfbdf41 | 1915 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
ee122c79 TG |
1916 | vni = rdst->remote_vni; |
1917 | dst = &rdst->remote_ip; | |
1918 | } else { | |
1919 | if (!info) { | |
1920 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
1921 | dev->name); | |
1922 | goto drop; | |
1923 | } | |
1924 | ||
0dfbdf41 | 1925 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
ee122c79 TG |
1926 | vni = be64_to_cpu(info->key.tun_id); |
1927 | remote_ip.sin.sin_family = AF_INET; | |
1928 | remote_ip.sin.sin_addr.s_addr = info->key.ipv4_dst; | |
1929 | dst = &remote_ip; | |
1930 | } | |
e4f67add | 1931 | |
e4c7ed41 | 1932 | if (vxlan_addr_any(dst)) { |
e4f67add | 1933 | if (did_rsc) { |
e4f67add | 1934 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1935 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1936 | return; |
e4f67add | 1937 | } |
ef59febe | 1938 | goto drop; |
e4f67add | 1939 | } |
ef59febe | 1940 | |
d342894c | 1941 | old_iph = ip_hdr(skb); |
1942 | ||
0dfbdf41 | 1943 | ttl = vxlan->cfg.ttl; |
e4c7ed41 | 1944 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1945 | ttl = 1; |
1946 | ||
0dfbdf41 | 1947 | tos = vxlan->cfg.tos; |
d342894c | 1948 | if (tos == 1) |
206aaafc | 1949 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1950 | |
0dfbdf41 TG |
1951 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
1952 | vxlan->cfg.port_max, true); | |
d342894c | 1953 | |
e4c7ed41 | 1954 | if (dst->sa.sa_family == AF_INET) { |
ee122c79 TG |
1955 | if (info) { |
1956 | if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) | |
1957 | df = htons(IP_DF); | |
1958 | if (info->key.tun_flags & TUNNEL_CSUM) | |
1959 | flags |= VXLAN_F_UDP_CSUM; | |
1960 | else | |
1961 | flags &= ~VXLAN_F_UDP_CSUM; | |
1962 | ||
1963 | ttl = info->key.ipv4_ttl; | |
1964 | tos = info->key.ipv4_tos; | |
1965 | ||
1966 | if (info->options_len) | |
1967 | md = ip_tunnel_info_opts(info, sizeof(*md)); | |
1968 | } else { | |
1969 | md->gbp = skb->mark; | |
1970 | } | |
1971 | ||
e4c7ed41 | 1972 | memset(&fl4, 0, sizeof(fl4)); |
ee122c79 | 1973 | fl4.flowi4_oif = rdst ? rdst->remote_ifindex : 0; |
e4c7ed41 | 1974 | fl4.flowi4_tos = RT_TOS(tos); |
239fb791 TG |
1975 | fl4.flowi4_mark = skb->mark; |
1976 | fl4.flowi4_proto = IPPROTO_UDP; | |
e4c7ed41 | 1977 | fl4.daddr = dst->sin.sin_addr.s_addr; |
0dfbdf41 | 1978 | fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr; |
e4c7ed41 | 1979 | |
f01ec1c0 | 1980 | rt = ip_route_output_key(vxlan->net, &fl4); |
e4c7ed41 CW |
1981 | if (IS_ERR(rt)) { |
1982 | netdev_dbg(dev, "no route to %pI4\n", | |
1983 | &dst->sin.sin_addr.s_addr); | |
1984 | dev->stats.tx_carrier_errors++; | |
1985 | goto tx_error; | |
1986 | } | |
d342894c | 1987 | |
e4c7ed41 CW |
1988 | if (rt->dst.dev == dev) { |
1989 | netdev_dbg(dev, "circular route to %pI4\n", | |
1990 | &dst->sin.sin_addr.s_addr); | |
1991 | dev->stats.collisions++; | |
fffc15a5 | 1992 | goto rt_tx_error; |
e4c7ed41 CW |
1993 | } |
1994 | ||
1995 | /* Bypass encapsulation if the destination is local */ | |
1996 | if (rt->rt_flags & RTCF_LOCAL && | |
1997 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1998 | struct vxlan_dev *dst_vxlan; | |
1999 | ||
2000 | ip_rt_put(rt); | |
19ca9fc1 | 2001 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
2002 | dst->sa.sa_family, dst_port, |
2003 | vxlan->flags); | |
e4c7ed41 CW |
2004 | if (!dst_vxlan) |
2005 | goto tx_error; | |
2006 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
2007 | return; | |
2008 | } | |
2009 | ||
2010 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); | |
2011 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
79b16aad | 2012 | err = vxlan_xmit_skb(rt, sk, skb, fl4.saddr, |
af33c1ad | 2013 | dst->sin.sin_addr.s_addr, tos, ttl, df, |
614732ea | 2014 | src_port, dst_port, htonl(vni << 8), md, |
af33c1ad | 2015 | !net_eq(vxlan->net, dev_net(vxlan->dev)), |
ee122c79 | 2016 | flags); |
74f47278 PS |
2017 | if (err < 0) { |
2018 | /* skb is already freed. */ | |
2019 | skb = NULL; | |
e4c7ed41 | 2020 | goto rt_tx_error; |
74f47278 PS |
2021 | } |
2022 | ||
e4c7ed41 CW |
2023 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); |
2024 | #if IS_ENABLED(CONFIG_IPV6) | |
2025 | } else { | |
e4c7ed41 CW |
2026 | struct dst_entry *ndst; |
2027 | struct flowi6 fl6; | |
2028 | u32 flags; | |
2029 | ||
2030 | memset(&fl6, 0, sizeof(fl6)); | |
ee122c79 | 2031 | fl6.flowi6_oif = rdst ? rdst->remote_ifindex : 0; |
e4c7ed41 | 2032 | fl6.daddr = dst->sin6.sin6_addr; |
0dfbdf41 | 2033 | fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr; |
239fb791 | 2034 | fl6.flowi6_mark = skb->mark; |
8c1bb79f | 2035 | fl6.flowi6_proto = IPPROTO_UDP; |
e4c7ed41 | 2036 | |
343d60aa | 2037 | if (ipv6_stub->ipv6_dst_lookup(vxlan->net, sk, &ndst, &fl6)) { |
e4c7ed41 CW |
2038 | netdev_dbg(dev, "no route to %pI6\n", |
2039 | &dst->sin6.sin6_addr); | |
2040 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 2041 | goto tx_error; |
e4c7ed41 | 2042 | } |
d342894c | 2043 | |
e4c7ed41 CW |
2044 | if (ndst->dev == dev) { |
2045 | netdev_dbg(dev, "circular route to %pI6\n", | |
2046 | &dst->sin6.sin6_addr); | |
2047 | dst_release(ndst); | |
2048 | dev->stats.collisions++; | |
2049 | goto tx_error; | |
2050 | } | |
0e6fbc5b | 2051 | |
e4c7ed41 CW |
2052 | /* Bypass encapsulation if the destination is local */ |
2053 | flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
2054 | if (flags & RTF_LOCAL && | |
2055 | !(flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
2056 | struct vxlan_dev *dst_vxlan; | |
2057 | ||
2058 | dst_release(ndst); | |
19ca9fc1 | 2059 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
2060 | dst->sa.sa_family, dst_port, |
2061 | vxlan->flags); | |
e4c7ed41 CW |
2062 | if (!dst_vxlan) |
2063 | goto tx_error; | |
2064 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
2065 | return; | |
2066 | } | |
49560532 | 2067 | |
e4c7ed41 | 2068 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
ee122c79 | 2069 | md->gbp = skb->mark; |
e4c7ed41 | 2070 | |
79b16aad | 2071 | err = vxlan6_xmit_skb(ndst, sk, skb, dev, &fl6.saddr, &fl6.daddr, |
614732ea | 2072 | 0, ttl, src_port, dst_port, htonl(vni << 8), md, |
af33c1ad TH |
2073 | !net_eq(vxlan->net, dev_net(vxlan->dev)), |
2074 | vxlan->flags); | |
e4c7ed41 CW |
2075 | #endif |
2076 | } | |
0e6fbc5b | 2077 | |
4ad16930 | 2078 | return; |
d342894c | 2079 | |
2080 | drop: | |
2081 | dev->stats.tx_dropped++; | |
2082 | goto tx_free; | |
2083 | ||
49560532 PS |
2084 | rt_tx_error: |
2085 | ip_rt_put(rt); | |
d342894c | 2086 | tx_error: |
2087 | dev->stats.tx_errors++; | |
2088 | tx_free: | |
2089 | dev_kfree_skb(skb); | |
d342894c | 2090 | } |
2091 | ||
6681712d DS |
2092 | /* Transmit local packets over Vxlan |
2093 | * | |
2094 | * Outer IP header inherits ECN and DF from inner header. | |
2095 | * Outer UDP destination is the VXLAN assigned port. | |
2096 | * source port is based on hash of flow | |
2097 | */ | |
2098 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2099 | { | |
2100 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3093fbe7 | 2101 | const struct ip_tunnel_info *info; |
6681712d DS |
2102 | struct ethhdr *eth; |
2103 | bool did_rsc = false; | |
8f646c92 | 2104 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 2105 | struct vxlan_fdb *f; |
6681712d | 2106 | |
3093fbe7 TG |
2107 | /* FIXME: Support IPv6 */ |
2108 | info = skb_tunnel_info(skb, AF_INET); | |
2109 | ||
6681712d DS |
2110 | skb_reset_mac_header(skb); |
2111 | eth = eth_hdr(skb); | |
2112 | ||
f564f45c CW |
2113 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
2114 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
2115 | return arp_reduce(dev, skb); | |
2116 | #if IS_ENABLED(CONFIG_IPV6) | |
2117 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
91269e39 LR |
2118 | pskb_may_pull(skb, sizeof(struct ipv6hdr) |
2119 | + sizeof(struct nd_msg)) && | |
f564f45c CW |
2120 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { |
2121 | struct nd_msg *msg; | |
2122 | ||
2123 | msg = (struct nd_msg *)skb_transport_header(skb); | |
2124 | if (msg->icmph.icmp6_code == 0 && | |
2125 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
2126 | return neigh_reduce(dev, skb); | |
2127 | } | |
7a9f526f | 2128 | eth = eth_hdr(skb); |
f564f45c CW |
2129 | #endif |
2130 | } | |
6681712d | 2131 | |
ee122c79 TG |
2132 | if (vxlan->flags & VXLAN_F_FLOW_BASED && |
2133 | info && info->mode == IP_TUNNEL_INFO_TX) { | |
2134 | vxlan_xmit_one(skb, dev, NULL, false); | |
2135 | return NETDEV_TX_OK; | |
2136 | } | |
2137 | ||
6681712d | 2138 | f = vxlan_find_mac(vxlan, eth->h_dest); |
ae884082 DS |
2139 | did_rsc = false; |
2140 | ||
2141 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
2142 | (ntohs(eth->h_proto) == ETH_P_IP || |
2143 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2144 | did_rsc = route_shortcircuit(dev, skb); |
2145 | if (did_rsc) | |
2146 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
2147 | } | |
2148 | ||
6681712d | 2149 | if (f == NULL) { |
afbd8bae MR |
2150 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
2151 | if (f == NULL) { | |
2152 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
2153 | !is_multicast_ether_addr(eth->h_dest)) | |
2154 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2155 | ||
2156 | dev->stats.tx_dropped++; | |
8f646c92 | 2157 | kfree_skb(skb); |
afbd8bae MR |
2158 | return NETDEV_TX_OK; |
2159 | } | |
2160 | } | |
6681712d | 2161 | |
afbd8bae MR |
2162 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2163 | struct sk_buff *skb1; | |
6681712d | 2164 | |
8f646c92 ED |
2165 | if (!fdst) { |
2166 | fdst = rdst; | |
2167 | continue; | |
2168 | } | |
afbd8bae MR |
2169 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2170 | if (skb1) | |
2171 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
2172 | } |
2173 | ||
8f646c92 ED |
2174 | if (fdst) |
2175 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
2176 | else | |
2177 | kfree_skb(skb); | |
4ad16930 | 2178 | return NETDEV_TX_OK; |
6681712d DS |
2179 | } |
2180 | ||
d342894c | 2181 | /* Walk the forwarding table and purge stale entries */ |
2182 | static void vxlan_cleanup(unsigned long arg) | |
2183 | { | |
2184 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2185 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2186 | unsigned int h; | |
2187 | ||
2188 | if (!netif_running(vxlan->dev)) | |
2189 | return; | |
2190 | ||
d342894c | 2191 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2192 | struct hlist_node *p, *n; | |
14e1d0fa SD |
2193 | |
2194 | spin_lock_bh(&vxlan->hash_lock); | |
d342894c | 2195 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2196 | struct vxlan_fdb *f | |
2197 | = container_of(p, struct vxlan_fdb, hlist); | |
2198 | unsigned long timeout; | |
2199 | ||
3c172868 | 2200 | if (f->state & NUD_PERMANENT) |
d342894c | 2201 | continue; |
2202 | ||
0dfbdf41 | 2203 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2204 | if (time_before_eq(timeout, jiffies)) { |
2205 | netdev_dbg(vxlan->dev, | |
2206 | "garbage collect %pM\n", | |
2207 | f->eth_addr); | |
2208 | f->state = NUD_STALE; | |
2209 | vxlan_fdb_destroy(vxlan, f); | |
2210 | } else if (time_before(timeout, next_timer)) | |
2211 | next_timer = timeout; | |
2212 | } | |
14e1d0fa | 2213 | spin_unlock_bh(&vxlan->hash_lock); |
d342894c | 2214 | } |
d342894c | 2215 | |
2216 | mod_timer(&vxlan->age_timer, next_timer); | |
2217 | } | |
2218 | ||
9c2e24e1 PS |
2219 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2220 | { | |
56ef9c90 | 2221 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
9c2e24e1 PS |
2222 | __u32 vni = vxlan->default_dst.remote_vni; |
2223 | ||
2224 | vxlan->vn_sock = vs; | |
56ef9c90 | 2225 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 2226 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); |
56ef9c90 | 2227 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
2228 | } |
2229 | ||
d342894c | 2230 | /* Setup stats when device is created */ |
2231 | static int vxlan_init(struct net_device *dev) | |
2232 | { | |
1c213bd2 | 2233 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2234 | if (!dev->tstats) |
d342894c | 2235 | return -ENOMEM; |
2236 | ||
2237 | return 0; | |
2238 | } | |
2239 | ||
ba609e9b | 2240 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2241 | { |
2242 | struct vxlan_fdb *f; | |
2243 | ||
2244 | spin_lock_bh(&vxlan->hash_lock); | |
2245 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2246 | if (f) | |
2247 | vxlan_fdb_destroy(vxlan, f); | |
2248 | spin_unlock_bh(&vxlan->hash_lock); | |
2249 | } | |
2250 | ||
ebf4063e SH |
2251 | static void vxlan_uninit(struct net_device *dev) |
2252 | { | |
2253 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 2254 | |
ba609e9b | 2255 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2256 | |
ebf4063e SH |
2257 | free_percpu(dev->tstats); |
2258 | } | |
2259 | ||
d342894c | 2260 | /* Start ageing timer and join group when device is brought up */ |
2261 | static int vxlan_open(struct net_device *dev) | |
2262 | { | |
2263 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
56ef9c90 MRL |
2264 | struct vxlan_sock *vs; |
2265 | int ret = 0; | |
1c51a915 | 2266 | |
614732ea TG |
2267 | vs = vxlan_sock_add(vxlan->net, vxlan->cfg.dst_port, |
2268 | vxlan->cfg.no_share, vxlan->flags); | |
56ef9c90 MRL |
2269 | if (IS_ERR(vs)) |
2270 | return PTR_ERR(vs); | |
2271 | ||
2272 | vxlan_vs_add_dev(vs, vxlan); | |
d342894c | 2273 | |
79d4a94f | 2274 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 MRL |
2275 | ret = vxlan_igmp_join(vxlan); |
2276 | if (ret) { | |
2277 | vxlan_sock_release(vs); | |
2278 | return ret; | |
2279 | } | |
d342894c | 2280 | } |
2281 | ||
0dfbdf41 | 2282 | if (vxlan->cfg.age_interval) |
d342894c | 2283 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
2284 | ||
56ef9c90 | 2285 | return ret; |
d342894c | 2286 | } |
2287 | ||
2288 | /* Purge the forwarding table */ | |
2289 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2290 | { | |
31fec5aa | 2291 | unsigned int h; |
d342894c | 2292 | |
2293 | spin_lock_bh(&vxlan->hash_lock); | |
2294 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2295 | struct hlist_node *p, *n; | |
2296 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2297 | struct vxlan_fdb *f | |
2298 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2299 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2300 | if (!is_zero_ether_addr(f->eth_addr)) | |
2301 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2302 | } |
2303 | } | |
2304 | spin_unlock_bh(&vxlan->hash_lock); | |
2305 | } | |
2306 | ||
2307 | /* Cleanup timer and forwarding table on shutdown */ | |
2308 | static int vxlan_stop(struct net_device *dev) | |
2309 | { | |
2310 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2311 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2312 | struct vxlan_sock *vs = vxlan->vn_sock; |
56ef9c90 | 2313 | int ret = 0; |
d342894c | 2314 | |
24c0e683 | 2315 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 2316 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 2317 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 2318 | |
2319 | del_timer_sync(&vxlan->age_timer); | |
2320 | ||
2321 | vxlan_flush(vxlan); | |
56ef9c90 | 2322 | vxlan_sock_release(vs); |
d342894c | 2323 | |
56ef9c90 | 2324 | return ret; |
d342894c | 2325 | } |
2326 | ||
d342894c | 2327 | /* Stub, nothing needs to be done. */ |
2328 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2329 | { | |
2330 | } | |
2331 | ||
345010b5 DB |
2332 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2333 | { | |
2334 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2335 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2336 | struct net_device *lowerdev; | |
2337 | int max_mtu; | |
2338 | ||
f01ec1c0 | 2339 | lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex); |
345010b5 DB |
2340 | if (lowerdev == NULL) |
2341 | return eth_change_mtu(dev, new_mtu); | |
2342 | ||
2343 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
2344 | max_mtu = lowerdev->mtu - VXLAN6_HEADROOM; | |
2345 | else | |
2346 | max_mtu = lowerdev->mtu - VXLAN_HEADROOM; | |
2347 | ||
2348 | if (new_mtu < 68 || new_mtu > max_mtu) | |
2349 | return -EINVAL; | |
2350 | ||
2351 | dev->mtu = new_mtu; | |
2352 | return 0; | |
2353 | } | |
2354 | ||
d342894c | 2355 | static const struct net_device_ops vxlan_netdev_ops = { |
2356 | .ndo_init = vxlan_init, | |
ebf4063e | 2357 | .ndo_uninit = vxlan_uninit, |
d342894c | 2358 | .ndo_open = vxlan_open, |
2359 | .ndo_stop = vxlan_stop, | |
2360 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2361 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2362 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2363 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2364 | .ndo_validate_addr = eth_validate_addr, |
2365 | .ndo_set_mac_address = eth_mac_addr, | |
2366 | .ndo_fdb_add = vxlan_fdb_add, | |
2367 | .ndo_fdb_del = vxlan_fdb_delete, | |
2368 | .ndo_fdb_dump = vxlan_fdb_dump, | |
2369 | }; | |
2370 | ||
2371 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2372 | static struct device_type vxlan_type = { | |
2373 | .name = "vxlan", | |
2374 | }; | |
2375 | ||
53cf5275 | 2376 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2377 | * supply the listening VXLAN udp ports. Callers are expected |
2378 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2379 | */ |
2380 | void vxlan_get_rx_port(struct net_device *dev) | |
2381 | { | |
2382 | struct vxlan_sock *vs; | |
2383 | struct net *net = dev_net(dev); | |
2384 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2385 | sa_family_t sa_family; | |
35e42379 JG |
2386 | __be16 port; |
2387 | unsigned int i; | |
53cf5275 JG |
2388 | |
2389 | spin_lock(&vn->sock_lock); | |
2390 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2391 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2392 | port = inet_sk(vs->sock->sk)->inet_sport; | |
53cf5275 JG |
2393 | sa_family = vs->sock->sk->sk_family; |
2394 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
2395 | port); | |
2396 | } | |
2397 | } | |
2398 | spin_unlock(&vn->sock_lock); | |
2399 | } | |
2400 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2401 | ||
d342894c | 2402 | /* Initialize the device structure. */ |
2403 | static void vxlan_setup(struct net_device *dev) | |
2404 | { | |
2405 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2406 | unsigned int h; |
d342894c | 2407 | |
2408 | eth_hw_addr_random(dev); | |
2409 | ether_setup(dev); | |
e4c7ed41 | 2410 | if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6) |
2853af6a | 2411 | dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM; |
e4c7ed41 | 2412 | else |
2853af6a | 2413 | dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM; |
d342894c | 2414 | |
2415 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 2416 | dev->destructor = free_netdev; |
d342894c | 2417 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2418 | ||
2419 | dev->tx_queue_len = 0; | |
2420 | dev->features |= NETIF_F_LLTX; | |
d6727fe3 | 2421 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2422 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2423 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2424 | |
1eaa8178 PS |
2425 | dev->vlan_features = dev->features; |
2426 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2427 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2428 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2429 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
02875878 | 2430 | netif_keep_dst(dev); |
6602d007 | 2431 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 2432 | |
553675fb | 2433 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2434 | spin_lock_init(&vxlan->hash_lock); |
2435 | ||
2436 | init_timer_deferrable(&vxlan->age_timer); | |
2437 | vxlan->age_timer.function = vxlan_cleanup; | |
2438 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2439 | ||
0dfbdf41 | 2440 | vxlan->cfg.dst_port = htons(vxlan_port); |
05f47d69 | 2441 | |
d342894c | 2442 | vxlan->dev = dev; |
2443 | ||
2444 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
2445 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2446 | } | |
2447 | ||
2448 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
2449 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2450 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2451 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2452 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2453 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2454 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2455 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2456 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
2457 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
2458 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2459 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2460 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2461 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2462 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2463 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2464 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
ee122c79 | 2465 | [IFLA_VXLAN_FLOWBASED] = { .type = NLA_U8 }, |
823aa873 | 2466 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
2467 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
2468 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
2469 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
2470 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
2471 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 2472 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
0ace2ca8 | 2473 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
d342894c | 2474 | }; |
2475 | ||
2476 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2477 | { | |
2478 | if (tb[IFLA_ADDRESS]) { | |
2479 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2480 | pr_debug("invalid link address (not ethernet)\n"); | |
2481 | return -EINVAL; | |
2482 | } | |
2483 | ||
2484 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2485 | pr_debug("invalid all zero ethernet address\n"); | |
2486 | return -EADDRNOTAVAIL; | |
2487 | } | |
2488 | } | |
2489 | ||
2490 | if (!data) | |
2491 | return -EINVAL; | |
2492 | ||
2493 | if (data[IFLA_VXLAN_ID]) { | |
2494 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2495 | if (id >= VXLAN_VID_MASK) | |
2496 | return -ERANGE; | |
2497 | } | |
2498 | ||
05f47d69 | 2499 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2500 | const struct ifla_vxlan_port_range *p | |
2501 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2502 | ||
2503 | if (ntohs(p->high) < ntohs(p->low)) { | |
2504 | pr_debug("port range %u .. %u not valid\n", | |
2505 | ntohs(p->low), ntohs(p->high)); | |
2506 | return -EINVAL; | |
2507 | } | |
2508 | } | |
2509 | ||
d342894c | 2510 | return 0; |
2511 | } | |
2512 | ||
1b13c97f YB |
2513 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2514 | struct ethtool_drvinfo *drvinfo) | |
2515 | { | |
2516 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2517 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2518 | } | |
2519 | ||
2520 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2521 | .get_drvinfo = vxlan_get_drvinfo, | |
2522 | .get_link = ethtool_op_get_link, | |
2523 | }; | |
2524 | ||
553675fb | 2525 | static void vxlan_del_work(struct work_struct *work) |
2526 | { | |
2527 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
acbf74a7 | 2528 | udp_tunnel_sock_release(vs->sock); |
553675fb | 2529 | kfree_rcu(vs, rcu); |
2530 | } | |
2531 | ||
3ee64f39 TH |
2532 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2533 | __be16 port, u32 flags) | |
553675fb | 2534 | { |
e4c7ed41 | 2535 | struct socket *sock; |
3ee64f39 TH |
2536 | struct udp_port_cfg udp_conf; |
2537 | int err; | |
e4c7ed41 | 2538 | |
3ee64f39 | 2539 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2540 | |
3ee64f39 TH |
2541 | if (ipv6) { |
2542 | udp_conf.family = AF_INET6; | |
3ee64f39 | 2543 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 2544 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
3ee64f39 TH |
2545 | } else { |
2546 | udp_conf.family = AF_INET; | |
e4c7ed41 | 2547 | } |
e4c7ed41 | 2548 | |
3ee64f39 | 2549 | udp_conf.local_udp_port = port; |
553675fb | 2550 | |
3ee64f39 TH |
2551 | /* Open UDP socket */ |
2552 | err = udp_sock_create(net, &udp_conf, &sock); | |
2553 | if (err < 0) | |
2554 | return ERR_PTR(err); | |
e4c7ed41 | 2555 | |
39deb2c7 | 2556 | return sock; |
e4c7ed41 CW |
2557 | } |
2558 | ||
2559 | /* Create new listen socket if needed */ | |
2560 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, | |
359a0ea9 | 2561 | u32 flags) |
e4c7ed41 CW |
2562 | { |
2563 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2564 | struct vxlan_sock *vs; | |
2565 | struct socket *sock; | |
e4c7ed41 | 2566 | unsigned int h; |
359a0ea9 | 2567 | bool ipv6 = !!(flags & VXLAN_F_IPV6); |
acbf74a7 | 2568 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 2569 | |
dc01e7d3 | 2570 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2571 | if (!vs) |
2572 | return ERR_PTR(-ENOMEM); | |
2573 | ||
2574 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2575 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2576 | ||
2577 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2578 | ||
3ee64f39 | 2579 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 2580 | if (IS_ERR(sock)) { |
56ef9c90 MRL |
2581 | pr_info("Cannot bind port %d, err=%ld\n", ntohs(port), |
2582 | PTR_ERR(sock)); | |
553675fb | 2583 | kfree(vs); |
e50fddc8 | 2584 | return ERR_CAST(sock); |
553675fb | 2585 | } |
e4c7ed41 CW |
2586 | |
2587 | vs->sock = sock; | |
9c2e24e1 | 2588 | atomic_set(&vs->refcnt, 1); |
af33c1ad | 2589 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 2590 | |
dc01e7d3 OG |
2591 | /* Initialize the vxlan udp offloads structure */ |
2592 | vs->udp_offloads.port = port; | |
2593 | vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive; | |
2594 | vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete; | |
2595 | ||
9c2e24e1 PS |
2596 | spin_lock(&vn->sock_lock); |
2597 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2598 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2599 | spin_unlock(&vn->sock_lock); |
553675fb | 2600 | |
2601 | /* Mark socket as an encapsulation socket. */ | |
acbf74a7 AZ |
2602 | tunnel_cfg.sk_user_data = vs; |
2603 | tunnel_cfg.encap_type = 1; | |
2604 | tunnel_cfg.encap_rcv = vxlan_udp_encap_recv; | |
2605 | tunnel_cfg.encap_destroy = NULL; | |
2606 | ||
2607 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 2608 | |
9c2e24e1 PS |
2609 | return vs; |
2610 | } | |
2611 | ||
614732ea TG |
2612 | static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
2613 | bool no_share, u32 flags) | |
9c2e24e1 PS |
2614 | { |
2615 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2616 | struct vxlan_sock *vs; | |
19ca9fc1 | 2617 | bool ipv6 = flags & VXLAN_F_IPV6; |
9c2e24e1 | 2618 | |
56ef9c90 MRL |
2619 | if (!no_share) { |
2620 | spin_lock(&vn->sock_lock); | |
2621 | vs = vxlan_find_sock(net, ipv6 ? AF_INET6 : AF_INET, port, | |
2622 | flags); | |
614732ea | 2623 | if (vs) { |
56ef9c90 MRL |
2624 | if (!atomic_add_unless(&vs->refcnt, 1, 0)) |
2625 | vs = ERR_PTR(-EBUSY); | |
2626 | spin_unlock(&vn->sock_lock); | |
2627 | return vs; | |
2628 | } | |
2629 | spin_unlock(&vn->sock_lock); | |
2630 | } | |
9c2e24e1 | 2631 | |
614732ea | 2632 | return vxlan_socket_create(net, port, flags); |
553675fb | 2633 | } |
2634 | ||
0dfbdf41 TG |
2635 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
2636 | struct vxlan_config *conf) | |
d342894c | 2637 | { |
33564bbb | 2638 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
d342894c | 2639 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 2640 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 2641 | int err; |
e4c7ed41 | 2642 | bool use_ipv6 = false; |
0dfbdf41 | 2643 | __be16 default_port = vxlan->cfg.dst_port; |
d342894c | 2644 | |
33564bbb | 2645 | vxlan->net = src_net; |
f01ec1c0 | 2646 | |
0dfbdf41 | 2647 | dst->remote_vni = conf->vni; |
d342894c | 2648 | |
0dfbdf41 | 2649 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); |
d342894c | 2650 | |
0dfbdf41 TG |
2651 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2652 | if (!dst->remote_ip.sa.sa_family) | |
2653 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 | 2654 | |
0dfbdf41 TG |
2655 | if (dst->remote_ip.sa.sa_family == AF_INET6 || |
2656 | vxlan->cfg.saddr.sa.sa_family == AF_INET6) | |
e4c7ed41 | 2657 | use_ipv6 = true; |
d342894c | 2658 | |
0dfbdf41 | 2659 | if (conf->remote_ifindex) { |
34e02aa1 | 2660 | struct net_device *lowerdev |
0dfbdf41 TG |
2661 | = __dev_get_by_index(src_net, conf->remote_ifindex); |
2662 | ||
2663 | dst->remote_ifindex = conf->remote_ifindex; | |
34e02aa1 | 2664 | |
2665 | if (!lowerdev) { | |
c7995c43 | 2666 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2667 | return -ENODEV; |
2668 | } | |
d342894c | 2669 | |
e4c7ed41 CW |
2670 | #if IS_ENABLED(CONFIG_IPV6) |
2671 | if (use_ipv6) { | |
2672 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2673 | if (idev && idev->cnf.disable_ipv6) { | |
2674 | pr_info("IPv6 is disabled via sysctl\n"); | |
2675 | return -EPERM; | |
2676 | } | |
2677 | vxlan->flags |= VXLAN_F_IPV6; | |
2678 | } | |
2679 | #endif | |
2680 | ||
0dfbdf41 | 2681 | if (!conf->mtu) |
e4c7ed41 | 2682 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 | 2683 | |
2853af6a | 2684 | dev->needed_headroom = lowerdev->hard_header_len + |
e4c7ed41 | 2685 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
7bda701e | 2686 | } else if (use_ipv6) |
2687 | vxlan->flags |= VXLAN_F_IPV6; | |
d342894c | 2688 | |
0dfbdf41 TG |
2689 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
2690 | if (!vxlan->cfg.dst_port) | |
2691 | vxlan->cfg.dst_port = default_port; | |
2692 | vxlan->flags |= conf->flags; | |
2693 | ||
2694 | if (!vxlan->cfg.age_interval) | |
2695 | vxlan->cfg.age_interval = FDB_AGE_DEFAULT; | |
2696 | ||
2697 | if (vxlan_find_vni(src_net, conf->vni, use_ipv6 ? AF_INET6 : AF_INET, | |
2698 | vxlan->cfg.dst_port, vxlan->flags)) | |
2699 | return -EEXIST; | |
2700 | ||
2701 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
2702 | ||
2703 | /* create an fdb entry for a valid default destination */ | |
2704 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2705 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2706 | &vxlan->default_dst.remote_ip, | |
2707 | NUD_REACHABLE|NUD_PERMANENT, | |
2708 | NLM_F_EXCL|NLM_F_CREATE, | |
2709 | vxlan->cfg.dst_port, | |
2710 | vxlan->default_dst.remote_vni, | |
2711 | vxlan->default_dst.remote_ifindex, | |
2712 | NTF_SELF); | |
2713 | if (err) | |
2714 | return err; | |
2715 | } | |
2716 | ||
2717 | err = register_netdevice(dev); | |
2718 | if (err) { | |
2719 | vxlan_fdb_delete_default(vxlan); | |
2720 | return err; | |
2721 | } | |
2722 | ||
2723 | list_add(&vxlan->next, &vn->vxlan_list); | |
2724 | ||
2725 | return 0; | |
2726 | } | |
2727 | ||
2728 | struct net_device *vxlan_dev_create(struct net *net, const char *name, | |
2729 | u8 name_assign_type, struct vxlan_config *conf) | |
2730 | { | |
2731 | struct nlattr *tb[IFLA_MAX+1]; | |
2732 | struct net_device *dev; | |
2733 | int err; | |
2734 | ||
2735 | memset(&tb, 0, sizeof(tb)); | |
2736 | ||
2737 | dev = rtnl_create_link(net, name, name_assign_type, | |
2738 | &vxlan_link_ops, tb); | |
2739 | if (IS_ERR(dev)) | |
2740 | return dev; | |
2741 | ||
2742 | err = vxlan_dev_configure(net, dev, conf); | |
2743 | if (err < 0) { | |
2744 | free_netdev(dev); | |
2745 | return ERR_PTR(err); | |
2746 | } | |
2747 | ||
2748 | return dev; | |
2749 | } | |
2750 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
2751 | ||
2752 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
2753 | struct nlattr *tb[], struct nlattr *data[]) | |
2754 | { | |
2755 | struct vxlan_config conf; | |
2756 | int err; | |
2757 | ||
2758 | if (!data[IFLA_VXLAN_ID]) | |
2759 | return -EINVAL; | |
2760 | ||
2761 | memset(&conf, 0, sizeof(conf)); | |
2762 | conf.vni = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2763 | ||
2764 | if (data[IFLA_VXLAN_GROUP]) { | |
2765 | conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); | |
2766 | } else if (data[IFLA_VXLAN_GROUP6]) { | |
2767 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2768 | return -EPFNOSUPPORT; | |
2769 | ||
2770 | conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); | |
2771 | conf.remote_ip.sa.sa_family = AF_INET6; | |
2772 | } | |
2773 | ||
2774 | if (data[IFLA_VXLAN_LOCAL]) { | |
2775 | conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); | |
2776 | conf.saddr.sa.sa_family = AF_INET; | |
2777 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2778 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2779 | return -EPFNOSUPPORT; | |
2780 | ||
2781 | /* TODO: respect scope id */ | |
2782 | conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); | |
2783 | conf.saddr.sa.sa_family = AF_INET6; | |
2784 | } | |
2785 | ||
2786 | if (data[IFLA_VXLAN_LINK]) | |
2787 | conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); | |
2788 | ||
d342894c | 2789 | if (data[IFLA_VXLAN_TOS]) |
0dfbdf41 | 2790 | conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 2791 | |
afb97186 | 2792 | if (data[IFLA_VXLAN_TTL]) |
0dfbdf41 | 2793 | conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 2794 | |
d342894c | 2795 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
0dfbdf41 | 2796 | conf.flags |= VXLAN_F_LEARN; |
d342894c | 2797 | |
2798 | if (data[IFLA_VXLAN_AGEING]) | |
0dfbdf41 | 2799 | conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); |
d342894c | 2800 | |
e4f67add | 2801 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
0dfbdf41 | 2802 | conf.flags |= VXLAN_F_PROXY; |
e4f67add DS |
2803 | |
2804 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
0dfbdf41 | 2805 | conf.flags |= VXLAN_F_RSC; |
e4f67add DS |
2806 | |
2807 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
0dfbdf41 | 2808 | conf.flags |= VXLAN_F_L2MISS; |
e4f67add DS |
2809 | |
2810 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
0dfbdf41 | 2811 | conf.flags |= VXLAN_F_L3MISS; |
e4f67add | 2812 | |
d342894c | 2813 | if (data[IFLA_VXLAN_LIMIT]) |
0dfbdf41 | 2814 | conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); |
d342894c | 2815 | |
ee122c79 TG |
2816 | if (data[IFLA_VXLAN_FLOWBASED] && |
2817 | nla_get_u8(data[IFLA_VXLAN_FLOWBASED])) | |
0dfbdf41 | 2818 | conf.flags |= VXLAN_F_FLOW_BASED; |
ee122c79 | 2819 | |
05f47d69 | 2820 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2821 | const struct ifla_vxlan_port_range *p | |
2822 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
0dfbdf41 TG |
2823 | conf.port_min = ntohs(p->low); |
2824 | conf.port_max = ntohs(p->high); | |
05f47d69 | 2825 | } |
2826 | ||
823aa873 | 2827 | if (data[IFLA_VXLAN_PORT]) |
0dfbdf41 | 2828 | conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); |
823aa873 | 2829 | |
359a0ea9 | 2830 | if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) |
0dfbdf41 | 2831 | conf.flags |= VXLAN_F_UDP_CSUM; |
359a0ea9 TH |
2832 | |
2833 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && | |
2834 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
0dfbdf41 | 2835 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; |
359a0ea9 TH |
2836 | |
2837 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && | |
2838 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
0dfbdf41 | 2839 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; |
359a0ea9 | 2840 | |
dfd8645e TH |
2841 | if (data[IFLA_VXLAN_REMCSUM_TX] && |
2842 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
0dfbdf41 | 2843 | conf.flags |= VXLAN_F_REMCSUM_TX; |
dfd8645e TH |
2844 | |
2845 | if (data[IFLA_VXLAN_REMCSUM_RX] && | |
2846 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
0dfbdf41 | 2847 | conf.flags |= VXLAN_F_REMCSUM_RX; |
dfd8645e | 2848 | |
3511494c | 2849 | if (data[IFLA_VXLAN_GBP]) |
0dfbdf41 | 2850 | conf.flags |= VXLAN_F_GBP; |
3511494c | 2851 | |
0ace2ca8 | 2852 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) |
0dfbdf41 | 2853 | conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL; |
0ace2ca8 | 2854 | |
0dfbdf41 TG |
2855 | err = vxlan_dev_configure(src_net, dev, &conf); |
2856 | switch (err) { | |
2857 | case -ENODEV: | |
2858 | pr_info("ifindex %d does not exist\n", conf.remote_ifindex); | |
2859 | break; | |
1b13c97f | 2860 | |
0dfbdf41 TG |
2861 | case -EPERM: |
2862 | pr_info("IPv6 is disabled via sysctl\n"); | |
2863 | break; | |
d342894c | 2864 | |
0dfbdf41 TG |
2865 | case -EEXIST: |
2866 | pr_info("duplicate VNI %u\n", conf.vni); | |
2867 | break; | |
afbd8bae MR |
2868 | } |
2869 | ||
0dfbdf41 | 2870 | return err; |
d342894c | 2871 | } |
2872 | ||
2873 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2874 | { | |
2875 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2876 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 2877 | |
fe5c3561 | 2878 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2879 | if (!hlist_unhashed(&vxlan->hlist)) |
2880 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 2881 | spin_unlock(&vn->sock_lock); |
2882 | ||
553675fb | 2883 | list_del(&vxlan->next); |
d342894c | 2884 | unregister_netdevice_queue(dev, head); |
2885 | } | |
2886 | ||
2887 | static size_t vxlan_get_size(const struct net_device *dev) | |
2888 | { | |
2889 | ||
2890 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 2891 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 2892 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 2893 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 2894 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
2895 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
2896 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
2897 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
2898 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
2899 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
2900 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
ee122c79 | 2901 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_FLOWBASED */ |
d342894c | 2902 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
2903 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 2904 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
2905 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
2906 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
2907 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
2908 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
2909 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
2910 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 2911 | 0; |
2912 | } | |
2913 | ||
2914 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
2915 | { | |
2916 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 2917 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 2918 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
2919 | .low = htons(vxlan->cfg.port_min), |
2920 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 2921 | }; |
d342894c | 2922 | |
c7995c43 | 2923 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 2924 | goto nla_put_failure; |
2925 | ||
e4c7ed41 CW |
2926 | if (!vxlan_addr_any(&dst->remote_ip)) { |
2927 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
2928 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
2929 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
2930 | goto nla_put_failure; |
2931 | #if IS_ENABLED(CONFIG_IPV6) | |
2932 | } else { | |
930345ea JB |
2933 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
2934 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
2935 | goto nla_put_failure; |
2936 | #endif | |
2937 | } | |
2938 | } | |
d342894c | 2939 | |
c7995c43 | 2940 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 2941 | goto nla_put_failure; |
2942 | ||
0dfbdf41 TG |
2943 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
2944 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 2945 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 2946 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
2947 | goto nla_put_failure; |
2948 | #if IS_ENABLED(CONFIG_IPV6) | |
2949 | } else { | |
930345ea | 2950 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 2951 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
2952 | goto nla_put_failure; |
2953 | #endif | |
2954 | } | |
2955 | } | |
d342894c | 2956 | |
0dfbdf41 TG |
2957 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
2958 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || | |
e4f67add DS |
2959 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
2960 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
2961 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
2962 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
2963 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
2964 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
2965 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
2966 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
2967 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
ee122c79 TG |
2968 | nla_put_u8(skb, IFLA_VXLAN_FLOWBASED, |
2969 | !!(vxlan->flags & VXLAN_F_FLOW_BASED)) || | |
0dfbdf41 TG |
2970 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
2971 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
2972 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 TH |
2973 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
2974 | !!(vxlan->flags & VXLAN_F_UDP_CSUM)) || | |
2975 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, | |
2976 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
2977 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
dfd8645e TH |
2978 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
2979 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, | |
2980 | !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) || | |
2981 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, | |
2982 | !!(vxlan->flags & VXLAN_F_REMCSUM_RX))) | |
d342894c | 2983 | goto nla_put_failure; |
2984 | ||
05f47d69 | 2985 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
2986 | goto nla_put_failure; | |
2987 | ||
3511494c TG |
2988 | if (vxlan->flags & VXLAN_F_GBP && |
2989 | nla_put_flag(skb, IFLA_VXLAN_GBP)) | |
2990 | goto nla_put_failure; | |
2991 | ||
0ace2ca8 TH |
2992 | if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL && |
2993 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) | |
2994 | goto nla_put_failure; | |
2995 | ||
d342894c | 2996 | return 0; |
2997 | ||
2998 | nla_put_failure: | |
2999 | return -EMSGSIZE; | |
3000 | } | |
3001 | ||
1728d4fa ND |
3002 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
3003 | { | |
3004 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3005 | ||
3006 | return vxlan->net; | |
3007 | } | |
3008 | ||
d342894c | 3009 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
3010 | .kind = "vxlan", | |
3011 | .maxtype = IFLA_VXLAN_MAX, | |
3012 | .policy = vxlan_policy, | |
3013 | .priv_size = sizeof(struct vxlan_dev), | |
3014 | .setup = vxlan_setup, | |
3015 | .validate = vxlan_validate, | |
3016 | .newlink = vxlan_newlink, | |
3017 | .dellink = vxlan_dellink, | |
3018 | .get_size = vxlan_get_size, | |
3019 | .fill_info = vxlan_fill_info, | |
1728d4fa | 3020 | .get_link_net = vxlan_get_link_net, |
d342894c | 3021 | }; |
3022 | ||
acaf4e70 DB |
3023 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
3024 | struct net_device *dev) | |
3025 | { | |
3026 | struct vxlan_dev *vxlan, *next; | |
3027 | LIST_HEAD(list_kill); | |
3028 | ||
3029 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3030 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3031 | ||
3032 | /* In case we created vxlan device with carrier | |
3033 | * and we loose the carrier due to module unload | |
3034 | * we also need to remove vxlan device. In other | |
3035 | * cases, it's not necessary and remote_ifindex | |
3036 | * is 0 here, so no matches. | |
3037 | */ | |
3038 | if (dst->remote_ifindex == dev->ifindex) | |
3039 | vxlan_dellink(vxlan->dev, &list_kill); | |
3040 | } | |
3041 | ||
3042 | unregister_netdevice_many(&list_kill); | |
3043 | } | |
3044 | ||
3045 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
3046 | unsigned long event, void *ptr) | |
3047 | { | |
3048 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 3049 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 3050 | |
783c1463 | 3051 | if (event == NETDEV_UNREGISTER) |
acaf4e70 DB |
3052 | vxlan_handle_lowerdev_unregister(vn, dev); |
3053 | ||
3054 | return NOTIFY_DONE; | |
3055 | } | |
3056 | ||
3057 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
3058 | .notifier_call = vxlan_lowerdev_event, | |
3059 | }; | |
3060 | ||
d342894c | 3061 | static __net_init int vxlan_init_net(struct net *net) |
3062 | { | |
3063 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 3064 | unsigned int h; |
d342894c | 3065 | |
553675fb | 3066 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 3067 | spin_lock_init(&vn->sock_lock); |
d342894c | 3068 | |
553675fb | 3069 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
3070 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 3071 | |
3072 | return 0; | |
3073 | } | |
3074 | ||
f01ec1c0 ND |
3075 | static void __net_exit vxlan_exit_net(struct net *net) |
3076 | { | |
3077 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3078 | struct vxlan_dev *vxlan, *next; | |
3079 | struct net_device *dev, *aux; | |
3080 | LIST_HEAD(list); | |
3081 | ||
3082 | rtnl_lock(); | |
3083 | for_each_netdev_safe(net, dev, aux) | |
3084 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
3085 | unregister_netdevice_queue(dev, &list); | |
3086 | ||
3087 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3088 | /* If vxlan->dev is in the same netns, it has already been added | |
3089 | * to the list by the previous loop. | |
3090 | */ | |
3091 | if (!net_eq(dev_net(vxlan->dev), net)) | |
13c3ed6a | 3092 | unregister_netdevice_queue(vxlan->dev, &list); |
f01ec1c0 ND |
3093 | } |
3094 | ||
3095 | unregister_netdevice_many(&list); | |
3096 | rtnl_unlock(); | |
3097 | } | |
3098 | ||
d342894c | 3099 | static struct pernet_operations vxlan_net_ops = { |
3100 | .init = vxlan_init_net, | |
f01ec1c0 | 3101 | .exit = vxlan_exit_net, |
d342894c | 3102 | .id = &vxlan_net_id, |
3103 | .size = sizeof(struct vxlan_net), | |
3104 | }; | |
3105 | ||
3106 | static int __init vxlan_init_module(void) | |
3107 | { | |
3108 | int rc; | |
3109 | ||
758c57d1 SH |
3110 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
3111 | if (!vxlan_wq) | |
3112 | return -ENOMEM; | |
3113 | ||
d342894c | 3114 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
3115 | ||
783c1463 | 3116 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 3117 | if (rc) |
3118 | goto out1; | |
3119 | ||
acaf4e70 | 3120 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 3121 | if (rc) |
3122 | goto out2; | |
3123 | ||
acaf4e70 DB |
3124 | rc = rtnl_link_register(&vxlan_link_ops); |
3125 | if (rc) | |
3126 | goto out3; | |
d342894c | 3127 | |
acaf4e70 DB |
3128 | return 0; |
3129 | out3: | |
3130 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 3131 | out2: |
783c1463 | 3132 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 3133 | out1: |
758c57d1 | 3134 | destroy_workqueue(vxlan_wq); |
d342894c | 3135 | return rc; |
3136 | } | |
7332a13b | 3137 | late_initcall(vxlan_init_module); |
d342894c | 3138 | |
3139 | static void __exit vxlan_cleanup_module(void) | |
3140 | { | |
b7153984 | 3141 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 3142 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 3143 | destroy_workqueue(vxlan_wq); |
783c1463 DB |
3144 | unregister_pernet_subsys(&vxlan_net_ops); |
3145 | /* rcu_barrier() is called by netns */ | |
d342894c | 3146 | } |
3147 | module_exit(vxlan_cleanup_module); | |
3148 | ||
3149 | MODULE_LICENSE("GPL"); | |
3150 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 3151 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 3152 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 3153 | MODULE_ALIAS_RTNL_LINK("vxlan"); |