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stephen hemmingerd3428942012-10-01 12:32:35 +00001/*
Rami Roseneb5ce432012-11-13 13:29:15 +00002 * VXLAN: Virtual eXtensible Local Area Network
stephen hemmingerd3428942012-10-01 12:32:35 +00003 *
stephen hemminger3b8df3c2013-04-27 11:31:52 +00004 * Copyright (c) 2012-2013 Vyatta Inc.
stephen hemmingerd3428942012-10-01 12:32:35 +00005 *
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.
stephen hemmingerd3428942012-10-01 12:32:35 +00009 */
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>
Pravin B Shelar1eaa8172013-08-19 11:23:29 -070027#include <linux/if_vlan.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000028#include <linux/hash.h>
Yan Burman1b13c972013-01-29 23:43:07 +000029#include <linux/ethtool.h>
David Stevense4f67ad2012-11-20 02:50:14 +000030#include <net/arp.h>
31#include <net/ndisc.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000032#include <net/ip.h>
Pravin B Shelarc5441932013-03-25 14:49:35 +000033#include <net/ip_tunnels.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000034#include <net/icmp.h>
35#include <net/udp.h>
Tom Herbert3ee64f32014-07-13 19:49:42 -070036#include <net/udp_tunnel.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000037#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>
Pravin B Shelar012a5722013-08-19 11:23:07 -070043#include <net/vxlan.h>
Or Gerlitzdc01e7d2014-01-20 13:59:21 +020044#include <net/protocol.h>
Andy Zhouacbf74a2014-09-16 17:31:18 -070045#include <net/udp_tunnel.h>
Cong Wange4c7ed42013-08-31 13:44:33 +080046#if IS_ENABLED(CONFIG_IPV6)
47#include <net/ipv6.h>
48#include <net/addrconf.h>
49#include <net/ip6_tunnel.h>
Cong Wang660d98c2013-09-02 10:06:52 +080050#include <net/ip6_checksum.h>
Cong Wange4c7ed42013-08-31 13:44:33 +080051#endif
stephen hemmingerd3428942012-10-01 12:32:35 +000052
53#define VXLAN_VERSION "0.1"
54
stephen hemminger553675f2013-05-16 11:35:20 +000055#define PORT_HASH_BITS 8
56#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
stephen hemmingerd3428942012-10-01 12:32:35 +000057#define VNI_HASH_BITS 10
58#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
59#define FDB_HASH_BITS 8
60#define FDB_HASH_SIZE (1<<FDB_HASH_BITS)
61#define FDB_AGE_DEFAULT 300 /* 5 min */
62#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
63
64#define VXLAN_N_VID (1u << 24)
65#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
Pravin B Shelar7ce04752013-08-19 11:22:54 -070066#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
stephen hemmingerd3428942012-10-01 12:32:35 +000067
68#define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */
69
stephen hemminger23c578b2013-04-27 11:31:53 +000070/* UDP port for VXLAN traffic.
71 * The IANA assigned port is 4789, but the Linux default is 8472
Stephen Hemminger234f5b72013-06-17 14:16:41 -070072 * for compatibility with early adopters.
stephen hemminger23c578b2013-04-27 11:31:53 +000073 */
Stephen Hemminger9daaa392013-06-17 14:16:12 -070074static unsigned short vxlan_port __read_mostly = 8472;
75module_param_named(udp_port, vxlan_port, ushort, 0444);
stephen hemmingerd3428942012-10-01 12:32:35 +000076MODULE_PARM_DESC(udp_port, "Destination UDP port");
77
78static bool log_ecn_error = true;
79module_param(log_ecn_error, bool, 0644);
80MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
81
Pravin B Shelar60d9d4c2013-06-20 00:26:31 -070082static int vxlan_net_id;
stephen hemminger553675f2013-05-16 11:35:20 +000083
Mike Rapoportafbd8ba2013-06-25 16:01:51 +030084static const u8 all_zeros_mac[ETH_ALEN];
85
stephen hemminger553675f2013-05-16 11:35:20 +000086/* per-network namespace private data for this module */
87struct vxlan_net {
88 struct list_head vxlan_list;
89 struct hlist_head sock_list[PORT_HASH_SIZE];
Stephen Hemminger1c51a912013-06-17 14:16:11 -070090 spinlock_t sock_lock;
stephen hemminger553675f2013-05-16 11:35:20 +000091};
92
Cong Wange4c7ed42013-08-31 13:44:33 +080093union vxlan_addr {
94 struct sockaddr_in sin;
95 struct sockaddr_in6 sin6;
96 struct sockaddr sa;
97};
98
David Stevens66817122013-03-15 04:35:51 +000099struct vxlan_rdst {
Cong Wange4c7ed42013-08-31 13:44:33 +0800100 union vxlan_addr remote_ip;
David Stevens66817122013-03-15 04:35:51 +0000101 __be16 remote_port;
102 u32 remote_vni;
103 u32 remote_ifindex;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700104 struct list_head list;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300105 struct rcu_head rcu;
David Stevens66817122013-03-15 04:35:51 +0000106};
107
stephen hemmingerd3428942012-10-01 12:32:35 +0000108/* Forwarding table entry */
109struct vxlan_fdb {
110 struct hlist_node hlist; /* linked list of entries */
111 struct rcu_head rcu;
112 unsigned long updated; /* jiffies */
113 unsigned long used;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700114 struct list_head remotes;
stephen hemmingerd3428942012-10-01 12:32:35 +0000115 u16 state; /* see ndm_state */
David Stevensae884082013-04-19 00:36:26 +0000116 u8 flags; /* see ndm_flags */
stephen hemmingerd3428942012-10-01 12:32:35 +0000117 u8 eth_addr[ETH_ALEN];
118};
119
stephen hemmingerd3428942012-10-01 12:32:35 +0000120/* Pseudo network device */
121struct vxlan_dev {
stephen hemminger553675f2013-05-16 11:35:20 +0000122 struct hlist_node hlist; /* vni hash table */
123 struct list_head next; /* vxlan's per namespace list */
124 struct vxlan_sock *vn_sock; /* listening socket */
stephen hemmingerd3428942012-10-01 12:32:35 +0000125 struct net_device *dev;
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +0200126 struct net *net; /* netns for packet i/o */
Atzm Watanabec7995c42013-04-16 02:50:52 +0000127 struct vxlan_rdst default_dst; /* default destination */
Cong Wange4c7ed42013-08-31 13:44:33 +0800128 union vxlan_addr saddr; /* source address */
stephen hemminger823aa872013-04-27 11:31:57 +0000129 __be16 dst_port;
stephen hemminger05f47d62012-10-09 20:35:50 +0000130 __u16 port_min; /* source port range */
131 __u16 port_max;
stephen hemmingerd3428942012-10-01 12:32:35 +0000132 __u8 tos; /* TOS override */
133 __u8 ttl;
Tom Herbert359a0ea2014-06-04 17:20:29 -0700134 u32 flags; /* VXLAN_F_* in vxlan.h */
stephen hemmingerd3428942012-10-01 12:32:35 +0000135
Stephen Hemminger1c51a912013-06-17 14:16:11 -0700136 struct work_struct sock_work;
stephen hemminger3fc2de22013-07-18 08:40:15 -0700137 struct work_struct igmp_join;
138 struct work_struct igmp_leave;
Stephen Hemminger1c51a912013-06-17 14:16:11 -0700139
stephen hemmingerd3428942012-10-01 12:32:35 +0000140 unsigned long age_interval;
141 struct timer_list age_timer;
142 spinlock_t hash_lock;
143 unsigned int addrcnt;
144 unsigned int addrmax;
stephen hemmingerd3428942012-10-01 12:32:35 +0000145
146 struct hlist_head fdb_head[FDB_HASH_SIZE];
147};
148
149/* salt for hash table */
150static u32 vxlan_salt __read_mostly;
Stephen Hemminger758c57d2013-06-17 14:16:09 -0700151static struct workqueue_struct *vxlan_wq;
stephen hemmingerd3428942012-10-01 12:32:35 +0000152
Stephen Hemminger1c51a912013-06-17 14:16:11 -0700153static void vxlan_sock_work(struct work_struct *work);
154
Cong Wange4c7ed42013-08-31 13:44:33 +0800155#if IS_ENABLED(CONFIG_IPV6)
156static inline
157bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
158{
159 if (a->sa.sa_family != b->sa.sa_family)
160 return false;
161 if (a->sa.sa_family == AF_INET6)
162 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
163 else
164 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
165}
166
167static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
168{
169 if (ipa->sa.sa_family == AF_INET6)
170 return ipv6_addr_any(&ipa->sin6.sin6_addr);
171 else
172 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
173}
174
175static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
176{
177 if (ipa->sa.sa_family == AF_INET6)
178 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
179 else
180 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
181}
182
183static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
184{
185 if (nla_len(nla) >= sizeof(struct in6_addr)) {
186 nla_memcpy(&ip->sin6.sin6_addr, nla, sizeof(struct in6_addr));
187 ip->sa.sa_family = AF_INET6;
188 return 0;
189 } else if (nla_len(nla) >= sizeof(__be32)) {
190 ip->sin.sin_addr.s_addr = nla_get_be32(nla);
191 ip->sa.sa_family = AF_INET;
192 return 0;
193 } else {
194 return -EAFNOSUPPORT;
195 }
196}
197
198static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
199 const union vxlan_addr *ip)
200{
201 if (ip->sa.sa_family == AF_INET6)
202 return nla_put(skb, attr, sizeof(struct in6_addr), &ip->sin6.sin6_addr);
203 else
204 return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr);
205}
206
207#else /* !CONFIG_IPV6 */
208
209static inline
210bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
211{
212 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
213}
214
215static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
216{
217 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
218}
219
220static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
221{
222 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
223}
224
225static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
226{
227 if (nla_len(nla) >= sizeof(struct in6_addr)) {
228 return -EAFNOSUPPORT;
229 } else if (nla_len(nla) >= sizeof(__be32)) {
230 ip->sin.sin_addr.s_addr = nla_get_be32(nla);
231 ip->sa.sa_family = AF_INET;
232 return 0;
233 } else {
234 return -EAFNOSUPPORT;
235 }
236}
237
238static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
239 const union vxlan_addr *ip)
240{
241 return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr);
242}
243#endif
244
stephen hemminger553675f2013-05-16 11:35:20 +0000245/* Virtual Network hash table head */
246static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id)
247{
248 return &vs->vni_list[hash_32(id, VNI_HASH_BITS)];
249}
250
251/* Socket hash table head */
252static inline struct hlist_head *vs_head(struct net *net, __be16 port)
stephen hemmingerd3428942012-10-01 12:32:35 +0000253{
254 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
255
stephen hemminger553675f2013-05-16 11:35:20 +0000256 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
257}
258
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700259/* First remote destination for a forwarding entry.
260 * Guaranteed to be non-NULL because remotes are never deleted.
261 */
stephen hemminger5ca54612013-08-04 17:17:39 -0700262static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700263{
stephen hemminger5ca54612013-08-04 17:17:39 -0700264 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
265}
266
267static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
268{
269 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700270}
271
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -0200272/* Find VXLAN socket based on network namespace, address family and UDP port */
273static struct vxlan_sock *vxlan_find_sock(struct net *net,
274 sa_family_t family, __be16 port)
stephen hemminger553675f2013-05-16 11:35:20 +0000275{
276 struct vxlan_sock *vs;
277
278 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -0200279 if (inet_sk(vs->sock->sk)->inet_sport == port &&
280 inet_sk(vs->sock->sk)->sk.sk_family == family)
stephen hemminger553675f2013-05-16 11:35:20 +0000281 return vs;
282 }
283 return NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +0000284}
285
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700286static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id)
stephen hemmingerd3428942012-10-01 12:32:35 +0000287{
288 struct vxlan_dev *vxlan;
stephen hemmingerd3428942012-10-01 12:32:35 +0000289
stephen hemminger553675f2013-05-16 11:35:20 +0000290 hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) {
Atzm Watanabec7995c42013-04-16 02:50:52 +0000291 if (vxlan->default_dst.remote_vni == id)
stephen hemmingerd3428942012-10-01 12:32:35 +0000292 return vxlan;
293 }
294
295 return NULL;
296}
297
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700298/* Look up VNI in a per net namespace table */
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -0200299static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id,
300 sa_family_t family, __be16 port)
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700301{
302 struct vxlan_sock *vs;
303
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -0200304 vs = vxlan_find_sock(net, family, port);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700305 if (!vs)
306 return NULL;
307
308 return vxlan_vs_find_vni(vs, id);
309}
310
stephen hemmingerd3428942012-10-01 12:32:35 +0000311/* Fill in neighbour message in skbuff. */
312static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
Stephen Hemminger234f5b72013-06-17 14:16:41 -0700313 const struct vxlan_fdb *fdb,
314 u32 portid, u32 seq, int type, unsigned int flags,
315 const struct vxlan_rdst *rdst)
stephen hemmingerd3428942012-10-01 12:32:35 +0000316{
317 unsigned long now = jiffies;
318 struct nda_cacheinfo ci;
319 struct nlmsghdr *nlh;
320 struct ndmsg *ndm;
David Stevense4f67ad2012-11-20 02:50:14 +0000321 bool send_ip, send_eth;
stephen hemmingerd3428942012-10-01 12:32:35 +0000322
323 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
324 if (nlh == NULL)
325 return -EMSGSIZE;
326
327 ndm = nlmsg_data(nlh);
328 memset(ndm, 0, sizeof(*ndm));
David Stevense4f67ad2012-11-20 02:50:14 +0000329
330 send_eth = send_ip = true;
331
332 if (type == RTM_GETNEIGH) {
333 ndm->ndm_family = AF_INET;
Cong Wange4c7ed42013-08-31 13:44:33 +0800334 send_ip = !vxlan_addr_any(&rdst->remote_ip);
David Stevense4f67ad2012-11-20 02:50:14 +0000335 send_eth = !is_zero_ether_addr(fdb->eth_addr);
336 } else
337 ndm->ndm_family = AF_BRIDGE;
stephen hemmingerd3428942012-10-01 12:32:35 +0000338 ndm->ndm_state = fdb->state;
339 ndm->ndm_ifindex = vxlan->dev->ifindex;
David Stevensae884082013-04-19 00:36:26 +0000340 ndm->ndm_flags = fdb->flags;
Jun Zhao545469f2014-07-26 00:38:59 +0800341 ndm->ndm_type = RTN_UNICAST;
stephen hemmingerd3428942012-10-01 12:32:35 +0000342
David Stevense4f67ad2012-11-20 02:50:14 +0000343 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
stephen hemmingerd3428942012-10-01 12:32:35 +0000344 goto nla_put_failure;
345
Cong Wange4c7ed42013-08-31 13:44:33 +0800346 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
David Stevens66817122013-03-15 04:35:51 +0000347 goto nla_put_failure;
348
stephen hemminger823aa872013-04-27 11:31:57 +0000349 if (rdst->remote_port && rdst->remote_port != vxlan->dst_port &&
David Stevens66817122013-03-15 04:35:51 +0000350 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
351 goto nla_put_failure;
Atzm Watanabec7995c42013-04-16 02:50:52 +0000352 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
Pravin B Shelar60d9d4c2013-06-20 00:26:31 -0700353 nla_put_u32(skb, NDA_VNI, rdst->remote_vni))
David Stevens66817122013-03-15 04:35:51 +0000354 goto nla_put_failure;
355 if (rdst->remote_ifindex &&
356 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
stephen hemmingerd3428942012-10-01 12:32:35 +0000357 goto nla_put_failure;
358
359 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
360 ci.ndm_confirmed = 0;
361 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
362 ci.ndm_refcnt = 0;
363
364 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
365 goto nla_put_failure;
366
367 return nlmsg_end(skb, nlh);
368
369nla_put_failure:
370 nlmsg_cancel(skb, nlh);
371 return -EMSGSIZE;
372}
373
374static inline size_t vxlan_nlmsg_size(void)
375{
376 return NLMSG_ALIGN(sizeof(struct ndmsg))
377 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
Cong Wange4c7ed42013-08-31 13:44:33 +0800378 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
stephen hemminger73cf3312013-04-27 11:31:54 +0000379 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
David Stevens66817122013-03-15 04:35:51 +0000380 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
381 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
stephen hemmingerd3428942012-10-01 12:32:35 +0000382 + nla_total_size(sizeof(struct nda_cacheinfo));
383}
384
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200385static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
386 struct vxlan_rdst *rd, int type)
stephen hemmingerd3428942012-10-01 12:32:35 +0000387{
388 struct net *net = dev_net(vxlan->dev);
389 struct sk_buff *skb;
390 int err = -ENOBUFS;
391
392 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
393 if (skb == NULL)
394 goto errout;
395
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200396 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
stephen hemmingerd3428942012-10-01 12:32:35 +0000397 if (err < 0) {
398 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
399 WARN_ON(err == -EMSGSIZE);
400 kfree_skb(skb);
401 goto errout;
402 }
403
404 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
405 return;
406errout:
407 if (err < 0)
408 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
409}
410
Cong Wange4c7ed42013-08-31 13:44:33 +0800411static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
David Stevense4f67ad2012-11-20 02:50:14 +0000412{
413 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700414 struct vxlan_fdb f = {
415 .state = NUD_STALE,
416 };
417 struct vxlan_rdst remote = {
Cong Wange4c7ed42013-08-31 13:44:33 +0800418 .remote_ip = *ipa, /* goes to NDA_DST */
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700419 .remote_vni = VXLAN_N_VID,
420 };
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700421
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200422 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
David Stevense4f67ad2012-11-20 02:50:14 +0000423}
424
425static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
426{
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700427 struct vxlan_fdb f = {
428 .state = NUD_STALE,
429 };
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200430 struct vxlan_rdst remote = { };
David Stevense4f67ad2012-11-20 02:50:14 +0000431
David Stevense4f67ad2012-11-20 02:50:14 +0000432 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
433
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200434 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
David Stevense4f67ad2012-11-20 02:50:14 +0000435}
436
stephen hemmingerd3428942012-10-01 12:32:35 +0000437/* Hash Ethernet address */
438static u32 eth_hash(const unsigned char *addr)
439{
440 u64 value = get_unaligned((u64 *)addr);
441
442 /* only want 6 bytes */
443#ifdef __BIG_ENDIAN
stephen hemmingerd3428942012-10-01 12:32:35 +0000444 value >>= 16;
stephen hemminger321fb992012-10-09 20:35:47 +0000445#else
446 value <<= 16;
stephen hemmingerd3428942012-10-01 12:32:35 +0000447#endif
448 return hash_64(value, FDB_HASH_BITS);
449}
450
451/* Hash chain to use given mac address */
452static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
453 const u8 *mac)
454{
455 return &vxlan->fdb_head[eth_hash(mac)];
456}
457
458/* Look up Ethernet address in forwarding table */
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000459static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
stephen hemmingerd3428942012-10-01 12:32:35 +0000460 const u8 *mac)
stephen hemmingerd3428942012-10-01 12:32:35 +0000461{
462 struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
463 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000464
Sasha Levinb67bfe02013-02-27 17:06:00 -0800465 hlist_for_each_entry_rcu(f, head, hlist) {
Joe Perches7367d0b2013-09-01 11:51:23 -0700466 if (ether_addr_equal(mac, f->eth_addr))
stephen hemmingerd3428942012-10-01 12:32:35 +0000467 return f;
468 }
469
470 return NULL;
471}
472
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000473static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
474 const u8 *mac)
475{
476 struct vxlan_fdb *f;
477
478 f = __vxlan_find_mac(vxlan, mac);
479 if (f)
480 f->used = jiffies;
481
482 return f;
483}
484
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300485/* caller should hold vxlan->hash_lock */
486static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
Cong Wange4c7ed42013-08-31 13:44:33 +0800487 union vxlan_addr *ip, __be16 port,
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300488 __u32 vni, __u32 ifindex)
489{
490 struct vxlan_rdst *rd;
491
492 list_for_each_entry(rd, &f->remotes, list) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800493 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300494 rd->remote_port == port &&
495 rd->remote_vni == vni &&
496 rd->remote_ifindex == ifindex)
497 return rd;
498 }
499
500 return NULL;
501}
502
Thomas Richter906dc182013-07-19 17:20:07 +0200503/* Replace destination of unicast mac */
504static int vxlan_fdb_replace(struct vxlan_fdb *f,
Cong Wange4c7ed42013-08-31 13:44:33 +0800505 union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex)
Thomas Richter906dc182013-07-19 17:20:07 +0200506{
507 struct vxlan_rdst *rd;
508
509 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
510 if (rd)
511 return 0;
512
513 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
514 if (!rd)
515 return 0;
Cong Wange4c7ed42013-08-31 13:44:33 +0800516 rd->remote_ip = *ip;
Thomas Richter906dc182013-07-19 17:20:07 +0200517 rd->remote_port = port;
518 rd->remote_vni = vni;
519 rd->remote_ifindex = ifindex;
520 return 1;
521}
522
David Stevens66817122013-03-15 04:35:51 +0000523/* Add/update destinations for multicast */
524static int vxlan_fdb_append(struct vxlan_fdb *f,
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200525 union vxlan_addr *ip, __be16 port, __u32 vni,
526 __u32 ifindex, struct vxlan_rdst **rdp)
David Stevens66817122013-03-15 04:35:51 +0000527{
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700528 struct vxlan_rdst *rd;
David Stevens66817122013-03-15 04:35:51 +0000529
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300530 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
531 if (rd)
532 return 0;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700533
David Stevens66817122013-03-15 04:35:51 +0000534 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
535 if (rd == NULL)
536 return -ENOBUFS;
Cong Wange4c7ed42013-08-31 13:44:33 +0800537 rd->remote_ip = *ip;
David Stevens66817122013-03-15 04:35:51 +0000538 rd->remote_port = port;
539 rd->remote_vni = vni;
540 rd->remote_ifindex = ifindex;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700541
542 list_add_tail_rcu(&rd->list, &f->remotes);
543
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200544 *rdp = rd;
David Stevens66817122013-03-15 04:35:51 +0000545 return 1;
546}
547
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200548static struct sk_buff **vxlan_gro_receive(struct sk_buff **head, struct sk_buff *skb)
549{
550 struct sk_buff *p, **pp = NULL;
551 struct vxlanhdr *vh, *vh2;
552 struct ethhdr *eh, *eh2;
553 unsigned int hlen, off_vx, off_eth;
554 const struct packet_offload *ptype;
555 __be16 type;
556 int flush = 1;
557
558 off_vx = skb_gro_offset(skb);
559 hlen = off_vx + sizeof(*vh);
560 vh = skb_gro_header_fast(skb, off_vx);
561 if (skb_gro_header_hard(skb, hlen)) {
562 vh = skb_gro_header_slow(skb, hlen, off_vx);
563 if (unlikely(!vh))
564 goto out;
565 }
566 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
Tom Herbert6bae1d42014-06-10 18:54:26 -0700567 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200568
569 off_eth = skb_gro_offset(skb);
570 hlen = off_eth + sizeof(*eh);
571 eh = skb_gro_header_fast(skb, off_eth);
572 if (skb_gro_header_hard(skb, hlen)) {
573 eh = skb_gro_header_slow(skb, hlen, off_eth);
574 if (unlikely(!eh))
575 goto out;
576 }
577
578 flush = 0;
579
580 for (p = *head; p; p = p->next) {
581 if (!NAPI_GRO_CB(p)->same_flow)
582 continue;
583
584 vh2 = (struct vxlanhdr *)(p->data + off_vx);
585 eh2 = (struct ethhdr *)(p->data + off_eth);
586 if (vh->vx_vni != vh2->vx_vni || compare_ether_header(eh, eh2)) {
587 NAPI_GRO_CB(p)->same_flow = 0;
588 continue;
589 }
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200590 }
591
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200592 type = eh->h_proto;
593
594 rcu_read_lock();
595 ptype = gro_find_receive_by_type(type);
596 if (ptype == NULL) {
597 flush = 1;
598 goto out_unlock;
599 }
600
601 skb_gro_pull(skb, sizeof(*eh)); /* pull inner eth header */
Tom Herbert6bae1d42014-06-10 18:54:26 -0700602 skb_gro_postpull_rcsum(skb, eh, sizeof(*eh));
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200603 pp = ptype->callbacks.gro_receive(head, skb);
604
605out_unlock:
606 rcu_read_unlock();
607out:
608 NAPI_GRO_CB(skb)->flush |= flush;
609
610 return pp;
611}
612
613static int vxlan_gro_complete(struct sk_buff *skb, int nhoff)
614{
615 struct ethhdr *eh;
616 struct packet_offload *ptype;
617 __be16 type;
618 int vxlan_len = sizeof(struct vxlanhdr) + sizeof(struct ethhdr);
619 int err = -ENOSYS;
620
Jesse Grosscfdf1e12014-11-10 11:45:13 -0800621 udp_tunnel_gro_complete(skb, nhoff);
622
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200623 eh = (struct ethhdr *)(skb->data + nhoff + sizeof(struct vxlanhdr));
624 type = eh->h_proto;
625
626 rcu_read_lock();
627 ptype = gro_find_complete_by_type(type);
628 if (ptype != NULL)
629 err = ptype->callbacks.gro_complete(skb, nhoff + vxlan_len);
630
631 rcu_read_unlock();
632 return err;
633}
634
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700635/* Notify netdevs that UDP port started listening */
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200636static void vxlan_notify_add_rx_port(struct vxlan_sock *vs)
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700637{
638 struct net_device *dev;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200639 struct sock *sk = vs->sock->sk;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700640 struct net *net = sock_net(sk);
641 sa_family_t sa_family = sk->sk_family;
Joseph Gasparakis35e42372013-09-13 07:34:13 -0700642 __be16 port = inet_sk(sk)->inet_sport;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200643 int err;
644
645 if (sa_family == AF_INET) {
646 err = udp_add_offload(&vs->udp_offloads);
647 if (err)
648 pr_warn("vxlan: udp_add_offload failed with status %d\n", err);
649 }
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700650
651 rcu_read_lock();
652 for_each_netdev_rcu(net, dev) {
653 if (dev->netdev_ops->ndo_add_vxlan_port)
654 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
655 port);
656 }
657 rcu_read_unlock();
658}
659
660/* Notify netdevs that UDP port is no more listening */
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200661static void vxlan_notify_del_rx_port(struct vxlan_sock *vs)
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700662{
663 struct net_device *dev;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200664 struct sock *sk = vs->sock->sk;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700665 struct net *net = sock_net(sk);
666 sa_family_t sa_family = sk->sk_family;
Joseph Gasparakis35e42372013-09-13 07:34:13 -0700667 __be16 port = inet_sk(sk)->inet_sport;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700668
669 rcu_read_lock();
670 for_each_netdev_rcu(net, dev) {
671 if (dev->netdev_ops->ndo_del_vxlan_port)
672 dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family,
673 port);
674 }
675 rcu_read_unlock();
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200676
677 if (sa_family == AF_INET)
678 udp_del_offload(&vs->udp_offloads);
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700679}
680
stephen hemmingerd3428942012-10-01 12:32:35 +0000681/* Add new entry to forwarding table -- assumes lock held */
682static int vxlan_fdb_create(struct vxlan_dev *vxlan,
Cong Wange4c7ed42013-08-31 13:44:33 +0800683 const u8 *mac, union vxlan_addr *ip,
David Stevens66817122013-03-15 04:35:51 +0000684 __u16 state, __u16 flags,
stephen hemminger73cf3312013-04-27 11:31:54 +0000685 __be16 port, __u32 vni, __u32 ifindex,
David Stevensae884082013-04-19 00:36:26 +0000686 __u8 ndm_flags)
stephen hemmingerd3428942012-10-01 12:32:35 +0000687{
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200688 struct vxlan_rdst *rd = NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +0000689 struct vxlan_fdb *f;
690 int notify = 0;
691
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000692 f = __vxlan_find_mac(vxlan, mac);
stephen hemmingerd3428942012-10-01 12:32:35 +0000693 if (f) {
694 if (flags & NLM_F_EXCL) {
695 netdev_dbg(vxlan->dev,
696 "lost race to create %pM\n", mac);
697 return -EEXIST;
698 }
699 if (f->state != state) {
700 f->state = state;
701 f->updated = jiffies;
702 notify = 1;
703 }
David Stevensae884082013-04-19 00:36:26 +0000704 if (f->flags != ndm_flags) {
705 f->flags = ndm_flags;
706 f->updated = jiffies;
707 notify = 1;
708 }
Thomas Richter906dc182013-07-19 17:20:07 +0200709 if ((flags & NLM_F_REPLACE)) {
710 /* Only change unicasts */
711 if (!(is_multicast_ether_addr(f->eth_addr) ||
712 is_zero_ether_addr(f->eth_addr))) {
713 int rc = vxlan_fdb_replace(f, ip, port, vni,
714 ifindex);
715
716 if (rc < 0)
717 return rc;
718 notify |= rc;
719 } else
720 return -EOPNOTSUPP;
721 }
David Stevens66817122013-03-15 04:35:51 +0000722 if ((flags & NLM_F_APPEND) &&
Mike Rapoport58e4c762013-06-25 16:01:56 +0300723 (is_multicast_ether_addr(f->eth_addr) ||
724 is_zero_ether_addr(f->eth_addr))) {
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200725 int rc = vxlan_fdb_append(f, ip, port, vni, ifindex,
726 &rd);
David Stevens66817122013-03-15 04:35:51 +0000727
728 if (rc < 0)
729 return rc;
730 notify |= rc;
731 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000732 } else {
733 if (!(flags & NLM_F_CREATE))
734 return -ENOENT;
735
736 if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax)
737 return -ENOSPC;
738
Thomas Richter906dc182013-07-19 17:20:07 +0200739 /* Disallow replace to add a multicast entry */
740 if ((flags & NLM_F_REPLACE) &&
741 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
742 return -EOPNOTSUPP;
743
Cong Wange4c7ed42013-08-31 13:44:33 +0800744 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
stephen hemmingerd3428942012-10-01 12:32:35 +0000745 f = kmalloc(sizeof(*f), GFP_ATOMIC);
746 if (!f)
747 return -ENOMEM;
748
749 notify = 1;
stephen hemmingerd3428942012-10-01 12:32:35 +0000750 f->state = state;
David Stevensae884082013-04-19 00:36:26 +0000751 f->flags = ndm_flags;
stephen hemmingerd3428942012-10-01 12:32:35 +0000752 f->updated = f->used = jiffies;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700753 INIT_LIST_HEAD(&f->remotes);
stephen hemmingerd3428942012-10-01 12:32:35 +0000754 memcpy(f->eth_addr, mac, ETH_ALEN);
755
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200756 vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700757
stephen hemmingerd3428942012-10-01 12:32:35 +0000758 ++vxlan->addrcnt;
759 hlist_add_head_rcu(&f->hlist,
760 vxlan_fdb_head(vxlan, mac));
761 }
762
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200763 if (notify) {
764 if (rd == NULL)
765 rd = first_remote_rtnl(f);
766 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
767 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000768
769 return 0;
770}
771
Wei Yongjun6706c822013-04-11 19:00:35 +0000772static void vxlan_fdb_free(struct rcu_head *head)
David Stevens66817122013-03-15 04:35:51 +0000773{
774 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700775 struct vxlan_rdst *rd, *nd;
David Stevens66817122013-03-15 04:35:51 +0000776
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700777 list_for_each_entry_safe(rd, nd, &f->remotes, list)
David Stevens66817122013-03-15 04:35:51 +0000778 kfree(rd);
David Stevens66817122013-03-15 04:35:51 +0000779 kfree(f);
780}
781
stephen hemmingerd3428942012-10-01 12:32:35 +0000782static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
783{
784 netdev_dbg(vxlan->dev,
785 "delete %pM\n", f->eth_addr);
786
787 --vxlan->addrcnt;
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200788 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
stephen hemmingerd3428942012-10-01 12:32:35 +0000789
790 hlist_del_rcu(&f->hlist);
David Stevens66817122013-03-15 04:35:51 +0000791 call_rcu(&f->rcu, vxlan_fdb_free);
stephen hemmingerd3428942012-10-01 12:32:35 +0000792}
793
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300794static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
Cong Wange4c7ed42013-08-31 13:44:33 +0800795 union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex)
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300796{
797 struct net *net = dev_net(vxlan->dev);
Cong Wange4c7ed42013-08-31 13:44:33 +0800798 int err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300799
800 if (tb[NDA_DST]) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800801 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
802 if (err)
803 return err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300804 } else {
Cong Wange4c7ed42013-08-31 13:44:33 +0800805 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
806 if (remote->sa.sa_family == AF_INET) {
807 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
808 ip->sa.sa_family = AF_INET;
809#if IS_ENABLED(CONFIG_IPV6)
810 } else {
811 ip->sin6.sin6_addr = in6addr_any;
812 ip->sa.sa_family = AF_INET6;
813#endif
814 }
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300815 }
816
817 if (tb[NDA_PORT]) {
818 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
819 return -EINVAL;
820 *port = nla_get_be16(tb[NDA_PORT]);
821 } else {
822 *port = vxlan->dst_port;
823 }
824
825 if (tb[NDA_VNI]) {
826 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
827 return -EINVAL;
828 *vni = nla_get_u32(tb[NDA_VNI]);
829 } else {
830 *vni = vxlan->default_dst.remote_vni;
831 }
832
833 if (tb[NDA_IFINDEX]) {
834 struct net_device *tdev;
835
836 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
837 return -EINVAL;
838 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
Ying Xue73763942014-01-15 10:23:41 +0800839 tdev = __dev_get_by_index(net, *ifindex);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300840 if (!tdev)
841 return -EADDRNOTAVAIL;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300842 } else {
843 *ifindex = 0;
844 }
845
846 return 0;
847}
848
stephen hemmingerd3428942012-10-01 12:32:35 +0000849/* Add static entry (via netlink) */
850static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
851 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100852 const unsigned char *addr, u16 vid, u16 flags)
stephen hemmingerd3428942012-10-01 12:32:35 +0000853{
854 struct vxlan_dev *vxlan = netdev_priv(dev);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300855 /* struct net *net = dev_net(vxlan->dev); */
Cong Wange4c7ed42013-08-31 13:44:33 +0800856 union vxlan_addr ip;
stephen hemminger73cf3312013-04-27 11:31:54 +0000857 __be16 port;
858 u32 vni, ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +0000859 int err;
860
861 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
862 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
863 ndm->ndm_state);
864 return -EINVAL;
865 }
866
867 if (tb[NDA_DST] == NULL)
868 return -EINVAL;
869
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300870 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
871 if (err)
872 return err;
David Stevens66817122013-03-15 04:35:51 +0000873
Mike Rapoport5933a7b2014-04-01 09:23:01 +0300874 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
875 return -EAFNOSUPPORT;
876
stephen hemmingerd3428942012-10-01 12:32:35 +0000877 spin_lock_bh(&vxlan->hash_lock);
Cong Wange4c7ed42013-08-31 13:44:33 +0800878 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
stephen hemminger73cf3312013-04-27 11:31:54 +0000879 port, vni, ifindex, ndm->ndm_flags);
stephen hemmingerd3428942012-10-01 12:32:35 +0000880 spin_unlock_bh(&vxlan->hash_lock);
881
882 return err;
883}
884
885/* Delete entry (via netlink) */
Vlad Yasevich1690be62013-02-13 12:00:18 +0000886static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
887 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100888 const unsigned char *addr, u16 vid)
stephen hemmingerd3428942012-10-01 12:32:35 +0000889{
890 struct vxlan_dev *vxlan = netdev_priv(dev);
891 struct vxlan_fdb *f;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300892 struct vxlan_rdst *rd = NULL;
Cong Wange4c7ed42013-08-31 13:44:33 +0800893 union vxlan_addr ip;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300894 __be16 port;
895 u32 vni, ifindex;
896 int err;
897
898 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
899 if (err)
900 return err;
901
902 err = -ENOENT;
stephen hemmingerd3428942012-10-01 12:32:35 +0000903
904 spin_lock_bh(&vxlan->hash_lock);
905 f = vxlan_find_mac(vxlan, addr);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300906 if (!f)
907 goto out;
908
Cong Wange4c7ed42013-08-31 13:44:33 +0800909 if (!vxlan_addr_any(&ip)) {
910 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300911 if (!rd)
912 goto out;
stephen hemmingerd3428942012-10-01 12:32:35 +0000913 }
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300914
915 err = 0;
916
917 /* remove a destination if it's not the only one on the list,
918 * otherwise destroy the fdb entry
919 */
920 if (rd && !list_is_singular(&f->remotes)) {
921 list_del_rcu(&rd->list);
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200922 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
Wei Yongjundcdc7a52013-08-17 07:32:09 +0800923 kfree_rcu(rd, rcu);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300924 goto out;
925 }
926
927 vxlan_fdb_destroy(vxlan, f);
928
929out:
stephen hemmingerd3428942012-10-01 12:32:35 +0000930 spin_unlock_bh(&vxlan->hash_lock);
931
932 return err;
933}
934
935/* Dump forwarding table */
936static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
Jamal Hadi Salim5d5eacb2014-07-10 07:01:58 -0400937 struct net_device *dev,
938 struct net_device *filter_dev, int idx)
stephen hemmingerd3428942012-10-01 12:32:35 +0000939{
940 struct vxlan_dev *vxlan = netdev_priv(dev);
941 unsigned int h;
942
943 for (h = 0; h < FDB_HASH_SIZE; ++h) {
944 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000945 int err;
946
Sasha Levinb67bfe02013-02-27 17:06:00 -0800947 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
David Stevens66817122013-03-15 04:35:51 +0000948 struct vxlan_rdst *rd;
stephen hemmingerd3428942012-10-01 12:32:35 +0000949
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700950 if (idx < cb->args[0])
951 goto skip;
952
953 list_for_each_entry_rcu(rd, &f->remotes, list) {
David Stevens66817122013-03-15 04:35:51 +0000954 err = vxlan_fdb_info(skb, vxlan, f,
955 NETLINK_CB(cb->skb).portid,
956 cb->nlh->nlmsg_seq,
957 RTM_NEWNEIGH,
958 NLM_F_MULTI, rd);
959 if (err < 0)
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700960 goto out;
David Stevens66817122013-03-15 04:35:51 +0000961 }
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700962skip:
963 ++idx;
stephen hemmingerd3428942012-10-01 12:32:35 +0000964 }
965 }
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700966out:
stephen hemmingerd3428942012-10-01 12:32:35 +0000967 return idx;
968}
969
970/* Watch incoming packets to learn mapping between Ethernet address
971 * and Tunnel endpoint.
stephen hemminger26a41ae62013-06-17 12:09:58 -0700972 * Return true if packet is bogus and should be droppped.
stephen hemmingerd3428942012-10-01 12:32:35 +0000973 */
stephen hemminger26a41ae62013-06-17 12:09:58 -0700974static bool vxlan_snoop(struct net_device *dev,
Cong Wange4c7ed42013-08-31 13:44:33 +0800975 union vxlan_addr *src_ip, const u8 *src_mac)
stephen hemmingerd3428942012-10-01 12:32:35 +0000976{
977 struct vxlan_dev *vxlan = netdev_priv(dev);
978 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000979
980 f = vxlan_find_mac(vxlan, src_mac);
981 if (likely(f)) {
stephen hemminger5ca54612013-08-04 17:17:39 -0700982 struct vxlan_rdst *rdst = first_remote_rcu(f);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700983
Cong Wange4c7ed42013-08-31 13:44:33 +0800984 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip)))
stephen hemminger26a41ae62013-06-17 12:09:58 -0700985 return false;
986
987 /* Don't migrate static entries, drop packets */
stephen hemmingereb064c32013-06-18 14:27:01 -0700988 if (f->state & NUD_NOARP)
stephen hemminger26a41ae62013-06-17 12:09:58 -0700989 return true;
stephen hemmingerd3428942012-10-01 12:32:35 +0000990
991 if (net_ratelimit())
992 netdev_info(dev,
Cong Wange4c7ed42013-08-31 13:44:33 +0800993 "%pM migrated from %pIS to %pIS\n",
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700994 src_mac, &rdst->remote_ip, &src_ip);
stephen hemmingerd3428942012-10-01 12:32:35 +0000995
Cong Wange4c7ed42013-08-31 13:44:33 +0800996 rdst->remote_ip = *src_ip;
stephen hemmingerd3428942012-10-01 12:32:35 +0000997 f->updated = jiffies;
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200998 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
stephen hemmingerd3428942012-10-01 12:32:35 +0000999 } else {
1000 /* learned new entry */
1001 spin_lock(&vxlan->hash_lock);
stephen hemminger3bf74b12013-06-17 12:09:57 -07001002
1003 /* close off race between vxlan_flush and incoming packets */
1004 if (netif_running(dev))
1005 vxlan_fdb_create(vxlan, src_mac, src_ip,
1006 NUD_REACHABLE,
1007 NLM_F_EXCL|NLM_F_CREATE,
1008 vxlan->dst_port,
1009 vxlan->default_dst.remote_vni,
1010 0, NTF_SELF);
stephen hemmingerd3428942012-10-01 12:32:35 +00001011 spin_unlock(&vxlan->hash_lock);
1012 }
stephen hemminger26a41ae62013-06-17 12:09:58 -07001013
1014 return false;
stephen hemmingerd3428942012-10-01 12:32:35 +00001015}
1016
stephen hemmingerd3428942012-10-01 12:32:35 +00001017/* See if multicast group is already in use by other ID */
Gao feng95ab0992013-12-10 16:37:33 +08001018static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
stephen hemmingerd3428942012-10-01 12:32:35 +00001019{
stephen hemminger553675f2013-05-16 11:35:20 +00001020 struct vxlan_dev *vxlan;
stephen hemmingerd3428942012-10-01 12:32:35 +00001021
Gao feng95ab0992013-12-10 16:37:33 +08001022 /* The vxlan_sock is only used by dev, leaving group has
1023 * no effect on other vxlan devices.
1024 */
1025 if (atomic_read(&dev->vn_sock->refcnt) == 1)
1026 return false;
1027
stephen hemminger553675f2013-05-16 11:35:20 +00001028 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
Gao feng95ab0992013-12-10 16:37:33 +08001029 if (!netif_running(vxlan->dev) || vxlan == dev)
stephen hemminger553675f2013-05-16 11:35:20 +00001030 continue;
stephen hemmingerd3428942012-10-01 12:32:35 +00001031
Gao feng95ab0992013-12-10 16:37:33 +08001032 if (vxlan->vn_sock != dev->vn_sock)
1033 continue;
1034
1035 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1036 &dev->default_dst.remote_ip))
1037 continue;
1038
1039 if (vxlan->default_dst.remote_ifindex !=
1040 dev->default_dst.remote_ifindex)
1041 continue;
1042
1043 return true;
stephen hemminger553675f2013-05-16 11:35:20 +00001044 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001045
1046 return false;
1047}
1048
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001049static void vxlan_sock_hold(struct vxlan_sock *vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001050{
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001051 atomic_inc(&vs->refcnt);
stephen hemmingerd3428942012-10-01 12:32:35 +00001052}
1053
Pravin B Shelar012a5722013-08-19 11:23:07 -07001054void vxlan_sock_release(struct vxlan_sock *vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001055{
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07001056 struct sock *sk = vs->sock->sk;
1057 struct net *net = sock_net(sk);
1058 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Pravin B Shelar012a5722013-08-19 11:23:07 -07001059
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001060 if (!atomic_dec_and_test(&vs->refcnt))
1061 return;
1062
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001063 spin_lock(&vn->sock_lock);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001064 hlist_del_rcu(&vs->hlist);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02001065 vxlan_notify_del_rx_port(vs);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001066 spin_unlock(&vn->sock_lock);
1067
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001068 queue_work(vxlan_wq, &vs->del_work);
1069}
Pravin B Shelar012a5722013-08-19 11:23:07 -07001070EXPORT_SYMBOL_GPL(vxlan_sock_release);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001071
stephen hemminger3fc2de22013-07-18 08:40:15 -07001072/* Callback to update multicast group membership when first VNI on
1073 * multicast asddress is brought up
1074 * Done as workqueue because ip_mc_join_group acquires RTNL.
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001075 */
stephen hemminger3fc2de22013-07-18 08:40:15 -07001076static void vxlan_igmp_join(struct work_struct *work)
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001077{
stephen hemminger3fc2de22013-07-18 08:40:15 -07001078 struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_join);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001079 struct vxlan_sock *vs = vxlan->vn_sock;
1080 struct sock *sk = vs->sock->sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001081 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1082 int ifindex = vxlan->default_dst.remote_ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +00001083
stephen hemmingerd3428942012-10-01 12:32:35 +00001084 lock_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001085 if (ip->sa.sa_family == AF_INET) {
1086 struct ip_mreqn mreq = {
1087 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1088 .imr_ifindex = ifindex,
1089 };
1090
1091 ip_mc_join_group(sk, &mreq);
1092#if IS_ENABLED(CONFIG_IPV6)
1093 } else {
1094 ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1095 &ip->sin6.sin6_addr);
1096#endif
1097 }
stephen hemminger3fc2de22013-07-18 08:40:15 -07001098 release_sock(sk);
1099
Pravin B Shelar012a5722013-08-19 11:23:07 -07001100 vxlan_sock_release(vs);
stephen hemminger3fc2de22013-07-18 08:40:15 -07001101 dev_put(vxlan->dev);
1102}
1103
1104/* Inverse of vxlan_igmp_join when last VNI is brought down */
1105static void vxlan_igmp_leave(struct work_struct *work)
1106{
1107 struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_leave);
stephen hemminger3fc2de22013-07-18 08:40:15 -07001108 struct vxlan_sock *vs = vxlan->vn_sock;
1109 struct sock *sk = vs->sock->sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001110 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1111 int ifindex = vxlan->default_dst.remote_ifindex;
stephen hemminger3fc2de22013-07-18 08:40:15 -07001112
1113 lock_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001114 if (ip->sa.sa_family == AF_INET) {
1115 struct ip_mreqn mreq = {
1116 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1117 .imr_ifindex = ifindex,
1118 };
1119
1120 ip_mc_leave_group(sk, &mreq);
1121#if IS_ENABLED(CONFIG_IPV6)
1122 } else {
1123 ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1124 &ip->sin6.sin6_addr);
1125#endif
1126 }
1127
stephen hemmingerd3428942012-10-01 12:32:35 +00001128 release_sock(sk);
stephen hemmingerd3428942012-10-01 12:32:35 +00001129
Pravin B Shelar012a5722013-08-19 11:23:07 -07001130 vxlan_sock_release(vs);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001131 dev_put(vxlan->dev);
stephen hemmingerd3428942012-10-01 12:32:35 +00001132}
1133
1134/* Callback from net/ipv4/udp.c to receive packets */
1135static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
1136{
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001137 struct vxlan_sock *vs;
stephen hemmingerd3428942012-10-01 12:32:35 +00001138 struct vxlanhdr *vxh;
stephen hemmingerd3428942012-10-01 12:32:35 +00001139
stephen hemmingerd3428942012-10-01 12:32:35 +00001140 /* Need Vxlan and inner Ethernet header to be present */
Pravin B Shelar7ce04752013-08-19 11:22:54 -07001141 if (!pskb_may_pull(skb, VXLAN_HLEN))
stephen hemmingerd3428942012-10-01 12:32:35 +00001142 goto error;
1143
Pravin B Shelar7ce04752013-08-19 11:22:54 -07001144 /* Return packets with reserved bits set */
1145 vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
stephen hemmingerd3428942012-10-01 12:32:35 +00001146 if (vxh->vx_flags != htonl(VXLAN_FLAGS) ||
1147 (vxh->vx_vni & htonl(0xff))) {
1148 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1149 ntohl(vxh->vx_flags), ntohl(vxh->vx_vni));
1150 goto error;
1151 }
1152
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001153 if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB)))
stephen hemmingerd3428942012-10-01 12:32:35 +00001154 goto drop;
stephen hemmingerd3428942012-10-01 12:32:35 +00001155
Pravin B Shelar559835ea2013-09-24 10:25:40 -07001156 vs = rcu_dereference_sk_user_data(sk);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001157 if (!vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001158 goto drop;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001159
1160 vs->rcv(vs, skb, vxh->vx_vni);
1161 return 0;
1162
1163drop:
1164 /* Consume bad packet */
1165 kfree_skb(skb);
1166 return 0;
1167
1168error:
1169 /* Return non vxlan pkt */
1170 return 1;
1171}
1172
1173static void vxlan_rcv(struct vxlan_sock *vs,
1174 struct sk_buff *skb, __be32 vx_vni)
1175{
Cong Wange4c7ed42013-08-31 13:44:33 +08001176 struct iphdr *oip = NULL;
1177 struct ipv6hdr *oip6 = NULL;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001178 struct vxlan_dev *vxlan;
Li RongQing8f849852014-01-04 13:57:59 +08001179 struct pcpu_sw_netstats *stats;
Cong Wange4c7ed42013-08-31 13:44:33 +08001180 union vxlan_addr saddr;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001181 __u32 vni;
Cong Wange4c7ed42013-08-31 13:44:33 +08001182 int err = 0;
1183 union vxlan_addr *remote_ip;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001184
1185 vni = ntohl(vx_vni) >> 8;
1186 /* Is this VNI defined? */
1187 vxlan = vxlan_vs_find_vni(vs, vni);
1188 if (!vxlan)
1189 goto drop;
stephen hemmingerd3428942012-10-01 12:32:35 +00001190
Cong Wange4c7ed42013-08-31 13:44:33 +08001191 remote_ip = &vxlan->default_dst.remote_ip;
David Stevense4f67ad2012-11-20 02:50:14 +00001192 skb_reset_mac_header(skb);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02001193 skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev)));
stephen hemmingerd3428942012-10-01 12:32:35 +00001194 skb->protocol = eth_type_trans(skb, vxlan->dev);
Tom Herbertf79b0642014-06-14 23:24:36 -07001195 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
stephen hemmingerd3428942012-10-01 12:32:35 +00001196
1197 /* Ignore packet loops (and multicast echo) */
Joe Perches7367d0b2013-09-01 11:51:23 -07001198 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
stephen hemmingerd3428942012-10-01 12:32:35 +00001199 goto drop;
1200
Pravin B Shelar7ce04752013-08-19 11:22:54 -07001201 /* Re-examine inner Ethernet packet */
Cong Wange4c7ed42013-08-31 13:44:33 +08001202 if (remote_ip->sa.sa_family == AF_INET) {
1203 oip = ip_hdr(skb);
1204 saddr.sin.sin_addr.s_addr = oip->saddr;
1205 saddr.sa.sa_family = AF_INET;
1206#if IS_ENABLED(CONFIG_IPV6)
1207 } else {
1208 oip6 = ipv6_hdr(skb);
1209 saddr.sin6.sin6_addr = oip6->saddr;
1210 saddr.sa.sa_family = AF_INET6;
1211#endif
1212 }
1213
stephen hemminger26a41ae62013-06-17 12:09:58 -07001214 if ((vxlan->flags & VXLAN_F_LEARN) &&
Cong Wange4c7ed42013-08-31 13:44:33 +08001215 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source))
stephen hemminger26a41ae62013-06-17 12:09:58 -07001216 goto drop;
stephen hemmingerd3428942012-10-01 12:32:35 +00001217
stephen hemmingerd3428942012-10-01 12:32:35 +00001218 skb_reset_network_header(skb);
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00001219
Cong Wange4c7ed42013-08-31 13:44:33 +08001220 if (oip6)
1221 err = IP6_ECN_decapsulate(oip6, skb);
1222 if (oip)
1223 err = IP_ECN_decapsulate(oip, skb);
1224
stephen hemmingerd3428942012-10-01 12:32:35 +00001225 if (unlikely(err)) {
Cong Wange4c7ed42013-08-31 13:44:33 +08001226 if (log_ecn_error) {
1227 if (oip6)
1228 net_info_ratelimited("non-ECT from %pI6\n",
1229 &oip6->saddr);
1230 if (oip)
1231 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1232 &oip->saddr, oip->tos);
1233 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001234 if (err > 1) {
1235 ++vxlan->dev->stats.rx_frame_errors;
1236 ++vxlan->dev->stats.rx_errors;
1237 goto drop;
1238 }
1239 }
1240
Pravin B Shelare8171042013-03-25 14:49:46 +00001241 stats = this_cpu_ptr(vxlan->dev->tstats);
stephen hemmingerd3428942012-10-01 12:32:35 +00001242 u64_stats_update_begin(&stats->syncp);
1243 stats->rx_packets++;
1244 stats->rx_bytes += skb->len;
1245 u64_stats_update_end(&stats->syncp);
1246
1247 netif_rx(skb);
1248
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001249 return;
stephen hemmingerd3428942012-10-01 12:32:35 +00001250drop:
1251 /* Consume bad packet */
1252 kfree_skb(skb);
stephen hemmingerd3428942012-10-01 12:32:35 +00001253}
1254
David Stevense4f67ad2012-11-20 02:50:14 +00001255static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
1256{
1257 struct vxlan_dev *vxlan = netdev_priv(dev);
1258 struct arphdr *parp;
1259 u8 *arpptr, *sha;
1260 __be32 sip, tip;
1261 struct neighbour *n;
1262
1263 if (dev->flags & IFF_NOARP)
1264 goto out;
1265
1266 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1267 dev->stats.tx_dropped++;
1268 goto out;
1269 }
1270 parp = arp_hdr(skb);
1271
1272 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1273 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1274 parp->ar_pro != htons(ETH_P_IP) ||
1275 parp->ar_op != htons(ARPOP_REQUEST) ||
1276 parp->ar_hln != dev->addr_len ||
1277 parp->ar_pln != 4)
1278 goto out;
1279 arpptr = (u8 *)parp + sizeof(struct arphdr);
1280 sha = arpptr;
1281 arpptr += dev->addr_len; /* sha */
1282 memcpy(&sip, arpptr, sizeof(sip));
1283 arpptr += sizeof(sip);
1284 arpptr += dev->addr_len; /* tha */
1285 memcpy(&tip, arpptr, sizeof(tip));
1286
1287 if (ipv4_is_loopback(tip) ||
1288 ipv4_is_multicast(tip))
1289 goto out;
1290
1291 n = neigh_lookup(&arp_tbl, &tip, dev);
1292
1293 if (n) {
David Stevense4f67ad2012-11-20 02:50:14 +00001294 struct vxlan_fdb *f;
1295 struct sk_buff *reply;
1296
1297 if (!(n->nud_state & NUD_CONNECTED)) {
1298 neigh_release(n);
1299 goto out;
1300 }
1301
1302 f = vxlan_find_mac(vxlan, n->ha);
Cong Wange4c7ed42013-08-31 13:44:33 +08001303 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
David Stevense4f67ad2012-11-20 02:50:14 +00001304 /* bridge-local neighbor */
1305 neigh_release(n);
1306 goto out;
1307 }
1308
1309 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1310 n->ha, sha);
1311
1312 neigh_release(n);
1313
David Stevens73461352014-03-18 12:32:29 -04001314 if (reply == NULL)
1315 goto out;
1316
David Stevense4f67ad2012-11-20 02:50:14 +00001317 skb_reset_mac_header(reply);
1318 __skb_pull(reply, skb_network_offset(reply));
1319 reply->ip_summed = CHECKSUM_UNNECESSARY;
1320 reply->pkt_type = PACKET_HOST;
1321
1322 if (netif_rx_ni(reply) == NET_RX_DROP)
1323 dev->stats.rx_dropped++;
Cong Wange4c7ed42013-08-31 13:44:33 +08001324 } else if (vxlan->flags & VXLAN_F_L3MISS) {
1325 union vxlan_addr ipa = {
1326 .sin.sin_addr.s_addr = tip,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001327 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001328 };
1329
1330 vxlan_ip_miss(dev, &ipa);
1331 }
David Stevense4f67ad2012-11-20 02:50:14 +00001332out:
1333 consume_skb(skb);
1334 return NETDEV_TX_OK;
1335}
1336
Cong Wangf564f452013-08-31 13:44:36 +08001337#if IS_ENABLED(CONFIG_IPV6)
David Stevens4b29dba2014-03-24 10:39:58 -04001338static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1339 struct neighbour *n, bool isrouter)
1340{
1341 struct net_device *dev = request->dev;
1342 struct sk_buff *reply;
1343 struct nd_msg *ns, *na;
1344 struct ipv6hdr *pip6;
1345 u8 *daddr;
1346 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1347 int ns_olen;
1348 int i, len;
1349
1350 if (dev == NULL)
1351 return NULL;
1352
1353 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1354 sizeof(*na) + na_olen + dev->needed_tailroom;
1355 reply = alloc_skb(len, GFP_ATOMIC);
1356 if (reply == NULL)
1357 return NULL;
1358
1359 reply->protocol = htons(ETH_P_IPV6);
1360 reply->dev = dev;
1361 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1362 skb_push(reply, sizeof(struct ethhdr));
1363 skb_set_mac_header(reply, 0);
1364
1365 ns = (struct nd_msg *)skb_transport_header(request);
1366
1367 daddr = eth_hdr(request)->h_source;
1368 ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns);
1369 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1370 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1371 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1372 break;
1373 }
1374 }
1375
1376 /* Ethernet header */
1377 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1378 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1379 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1380 reply->protocol = htons(ETH_P_IPV6);
1381
1382 skb_pull(reply, sizeof(struct ethhdr));
1383 skb_set_network_header(reply, 0);
1384 skb_put(reply, sizeof(struct ipv6hdr));
1385
1386 /* IPv6 header */
1387
1388 pip6 = ipv6_hdr(reply);
1389 memset(pip6, 0, sizeof(struct ipv6hdr));
1390 pip6->version = 6;
1391 pip6->priority = ipv6_hdr(request)->priority;
1392 pip6->nexthdr = IPPROTO_ICMPV6;
1393 pip6->hop_limit = 255;
1394 pip6->daddr = ipv6_hdr(request)->saddr;
1395 pip6->saddr = *(struct in6_addr *)n->primary_key;
1396
1397 skb_pull(reply, sizeof(struct ipv6hdr));
1398 skb_set_transport_header(reply, 0);
1399
1400 na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen);
1401
1402 /* Neighbor Advertisement */
1403 memset(na, 0, sizeof(*na)+na_olen);
1404 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1405 na->icmph.icmp6_router = isrouter;
1406 na->icmph.icmp6_override = 1;
1407 na->icmph.icmp6_solicited = 1;
1408 na->target = ns->target;
1409 ether_addr_copy(&na->opt[2], n->ha);
1410 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1411 na->opt[1] = na_olen >> 3;
1412
1413 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1414 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1415 csum_partial(na, sizeof(*na)+na_olen, 0));
1416
1417 pip6->payload_len = htons(sizeof(*na)+na_olen);
1418
1419 skb_push(reply, sizeof(struct ipv6hdr));
1420
1421 reply->ip_summed = CHECKSUM_UNNECESSARY;
1422
1423 return reply;
1424}
1425
Cong Wangf564f452013-08-31 13:44:36 +08001426static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
1427{
1428 struct vxlan_dev *vxlan = netdev_priv(dev);
David Stevens4b29dba2014-03-24 10:39:58 -04001429 struct nd_msg *msg;
Cong Wangf564f452013-08-31 13:44:36 +08001430 const struct ipv6hdr *iphdr;
1431 const struct in6_addr *saddr, *daddr;
David Stevens4b29dba2014-03-24 10:39:58 -04001432 struct neighbour *n;
1433 struct inet6_dev *in6_dev;
Cong Wangf564f452013-08-31 13:44:36 +08001434
1435 in6_dev = __in6_dev_get(dev);
1436 if (!in6_dev)
1437 goto out;
1438
Cong Wangf564f452013-08-31 13:44:36 +08001439 iphdr = ipv6_hdr(skb);
1440 saddr = &iphdr->saddr;
1441 daddr = &iphdr->daddr;
1442
Cong Wangf564f452013-08-31 13:44:36 +08001443 msg = (struct nd_msg *)skb_transport_header(skb);
1444 if (msg->icmph.icmp6_code != 0 ||
1445 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1446 goto out;
1447
David Stevens4b29dba2014-03-24 10:39:58 -04001448 if (ipv6_addr_loopback(daddr) ||
1449 ipv6_addr_is_multicast(&msg->target))
1450 goto out;
1451
1452 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
Cong Wangf564f452013-08-31 13:44:36 +08001453
1454 if (n) {
1455 struct vxlan_fdb *f;
David Stevens4b29dba2014-03-24 10:39:58 -04001456 struct sk_buff *reply;
Cong Wangf564f452013-08-31 13:44:36 +08001457
1458 if (!(n->nud_state & NUD_CONNECTED)) {
1459 neigh_release(n);
1460 goto out;
1461 }
1462
1463 f = vxlan_find_mac(vxlan, n->ha);
1464 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1465 /* bridge-local neighbor */
1466 neigh_release(n);
1467 goto out;
1468 }
1469
David Stevens4b29dba2014-03-24 10:39:58 -04001470 reply = vxlan_na_create(skb, n,
1471 !!(f ? f->flags & NTF_ROUTER : 0));
1472
Cong Wangf564f452013-08-31 13:44:36 +08001473 neigh_release(n);
David Stevens4b29dba2014-03-24 10:39:58 -04001474
1475 if (reply == NULL)
1476 goto out;
1477
1478 if (netif_rx_ni(reply) == NET_RX_DROP)
1479 dev->stats.rx_dropped++;
1480
Cong Wangf564f452013-08-31 13:44:36 +08001481 } else if (vxlan->flags & VXLAN_F_L3MISS) {
David Stevens4b29dba2014-03-24 10:39:58 -04001482 union vxlan_addr ipa = {
1483 .sin6.sin6_addr = msg->target,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001484 .sin6.sin6_family = AF_INET6,
David Stevens4b29dba2014-03-24 10:39:58 -04001485 };
1486
Cong Wangf564f452013-08-31 13:44:36 +08001487 vxlan_ip_miss(dev, &ipa);
1488 }
1489
1490out:
1491 consume_skb(skb);
1492 return NETDEV_TX_OK;
1493}
1494#endif
1495
David Stevense4f67ad2012-11-20 02:50:14 +00001496static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1497{
1498 struct vxlan_dev *vxlan = netdev_priv(dev);
1499 struct neighbour *n;
David Stevense4f67ad2012-11-20 02:50:14 +00001500
1501 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1502 return false;
1503
1504 n = NULL;
1505 switch (ntohs(eth_hdr(skb)->h_proto)) {
1506 case ETH_P_IP:
Cong Wange15a00a2013-08-31 13:44:34 +08001507 {
1508 struct iphdr *pip;
1509
David Stevense4f67ad2012-11-20 02:50:14 +00001510 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1511 return false;
1512 pip = ip_hdr(skb);
1513 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
Cong Wange4c7ed42013-08-31 13:44:33 +08001514 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1515 union vxlan_addr ipa = {
1516 .sin.sin_addr.s_addr = pip->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001517 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001518 };
1519
1520 vxlan_ip_miss(dev, &ipa);
1521 return false;
1522 }
1523
David Stevense4f67ad2012-11-20 02:50:14 +00001524 break;
Cong Wange15a00a2013-08-31 13:44:34 +08001525 }
1526#if IS_ENABLED(CONFIG_IPV6)
1527 case ETH_P_IPV6:
1528 {
1529 struct ipv6hdr *pip6;
1530
1531 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1532 return false;
1533 pip6 = ipv6_hdr(skb);
1534 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
1535 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1536 union vxlan_addr ipa = {
1537 .sin6.sin6_addr = pip6->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001538 .sin6.sin6_family = AF_INET6,
Cong Wange15a00a2013-08-31 13:44:34 +08001539 };
1540
1541 vxlan_ip_miss(dev, &ipa);
1542 return false;
1543 }
1544
1545 break;
1546 }
1547#endif
David Stevense4f67ad2012-11-20 02:50:14 +00001548 default:
1549 return false;
1550 }
1551
1552 if (n) {
1553 bool diff;
1554
Joe Perches7367d0b2013-09-01 11:51:23 -07001555 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
David Stevense4f67ad2012-11-20 02:50:14 +00001556 if (diff) {
1557 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1558 dev->addr_len);
1559 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1560 }
1561 neigh_release(n);
1562 return diff;
Cong Wange4c7ed42013-08-31 13:44:33 +08001563 }
1564
David Stevense4f67ad2012-11-20 02:50:14 +00001565 return false;
1566}
1567
Cong Wange4c7ed42013-08-31 13:44:33 +08001568#if IS_ENABLED(CONFIG_IPV6)
Nicolas Dichtel11796182013-09-02 15:34:55 +02001569static int vxlan6_xmit_skb(struct vxlan_sock *vs,
Cong Wange4c7ed42013-08-31 13:44:33 +08001570 struct dst_entry *dst, struct sk_buff *skb,
1571 struct net_device *dev, struct in6_addr *saddr,
1572 struct in6_addr *daddr, __u8 prio, __u8 ttl,
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02001573 __be16 src_port, __be16 dst_port, __be32 vni,
1574 bool xnet)
Cong Wange4c7ed42013-08-31 13:44:33 +08001575{
Cong Wange4c7ed42013-08-31 13:44:33 +08001576 struct vxlanhdr *vxh;
Cong Wange4c7ed42013-08-31 13:44:33 +08001577 int min_headroom;
1578 int err;
Andy Zhouacbf74a2014-09-16 17:31:18 -07001579 bool udp_sum = !udp_get_no_check6_tx(vs->sock->sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001580
Andy Zhouacbf74a2014-09-16 17:31:18 -07001581 skb = udp_tunnel_handle_offloads(skb, udp_sum);
Pravin B Shelar74f47272014-12-23 16:20:36 -08001582 if (IS_ERR(skb)) {
1583 err = -EINVAL;
1584 goto err;
1585 }
Cong Wange4c7ed42013-08-31 13:44:33 +08001586
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02001587 skb_scrub_packet(skb, xnet);
Nicolas Dichtel963a88b2013-09-02 15:34:57 +02001588
Cong Wange4c7ed42013-08-31 13:44:33 +08001589 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
1590 + VXLAN_HLEN + sizeof(struct ipv6hdr)
1591 + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0);
1592
1593 /* Need space for new headers (invalidates iph ptr) */
1594 err = skb_cow_head(skb, min_headroom);
Pravin B Shelar74f47272014-12-23 16:20:36 -08001595 if (unlikely(err)) {
1596 kfree_skb(skb);
1597 goto err;
1598 }
Cong Wange4c7ed42013-08-31 13:44:33 +08001599
Jiri Pirko59682502014-11-19 14:04:59 +01001600 skb = vlan_hwaccel_push_inside(skb);
Pravin B Shelar74f47272014-12-23 16:20:36 -08001601 if (WARN_ON(!skb)) {
1602 err = -ENOMEM;
1603 goto err;
1604 }
Cong Wange4c7ed42013-08-31 13:44:33 +08001605
1606 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
1607 vxh->vx_flags = htonl(VXLAN_FLAGS);
1608 vxh->vx_vni = vni;
1609
Tom Herbert996c9fd2014-09-29 20:22:33 -07001610 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1611
Andy Zhouacbf74a2014-09-16 17:31:18 -07001612 udp_tunnel6_xmit_skb(vs->sock, dst, skb, dev, saddr, daddr, prio,
1613 ttl, src_port, dst_port);
Cong Wange4c7ed42013-08-31 13:44:33 +08001614 return 0;
Pravin B Shelar74f47272014-12-23 16:20:36 -08001615err:
1616 dst_release(dst);
1617 return err;
Cong Wange4c7ed42013-08-31 13:44:33 +08001618}
1619#endif
1620
Nicolas Dichtel11796182013-09-02 15:34:55 +02001621int vxlan_xmit_skb(struct vxlan_sock *vs,
Pravin B Shelar49560532013-08-19 11:23:17 -07001622 struct rtable *rt, struct sk_buff *skb,
1623 __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02001624 __be16 src_port, __be16 dst_port, __be32 vni, bool xnet)
Pravin B Shelar49560532013-08-19 11:23:17 -07001625{
1626 struct vxlanhdr *vxh;
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001627 int min_headroom;
Pravin B Shelar49560532013-08-19 11:23:17 -07001628 int err;
Andy Zhouacbf74a2014-09-16 17:31:18 -07001629 bool udp_sum = !vs->sock->sk->sk_no_check_tx;
Pravin B Shelar49560532013-08-19 11:23:17 -07001630
Andy Zhouacbf74a2014-09-16 17:31:18 -07001631 skb = udp_tunnel_handle_offloads(skb, udp_sum);
Tom Herbert359a0ea2014-06-04 17:20:29 -07001632 if (IS_ERR(skb))
Pravin B Shelar74f47272014-12-23 16:20:36 -08001633 return PTR_ERR(skb);
Pravin B Shelar49560532013-08-19 11:23:17 -07001634
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001635 min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07001636 + VXLAN_HLEN + sizeof(struct iphdr)
1637 + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0);
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001638
1639 /* Need space for new headers (invalidates iph ptr) */
1640 err = skb_cow_head(skb, min_headroom);
Pravin B Shelar74f47272014-12-23 16:20:36 -08001641 if (unlikely(err)) {
1642 kfree_skb(skb);
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001643 return err;
Pravin B Shelar74f47272014-12-23 16:20:36 -08001644 }
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001645
Jiri Pirko59682502014-11-19 14:04:59 +01001646 skb = vlan_hwaccel_push_inside(skb);
1647 if (WARN_ON(!skb))
1648 return -ENOMEM;
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07001649
Pravin B Shelar49560532013-08-19 11:23:17 -07001650 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
1651 vxh->vx_flags = htonl(VXLAN_FLAGS);
1652 vxh->vx_vni = vni;
1653
Tom Herbert996c9fd2014-09-29 20:22:33 -07001654 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1655
Andy Zhouacbf74a2014-09-16 17:31:18 -07001656 return udp_tunnel_xmit_skb(vs->sock, rt, skb, src, dst, tos,
1657 ttl, df, src_port, dst_port, xnet);
Pravin B Shelar49560532013-08-19 11:23:17 -07001658}
1659EXPORT_SYMBOL_GPL(vxlan_xmit_skb);
1660
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001661/* Bypass encapsulation if the destination is local */
1662static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
1663 struct vxlan_dev *dst_vxlan)
1664{
Li RongQing8f849852014-01-04 13:57:59 +08001665 struct pcpu_sw_netstats *tx_stats, *rx_stats;
Cong Wange4c7ed42013-08-31 13:44:33 +08001666 union vxlan_addr loopback;
1667 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
Li RongQingce6502a2014-10-16 08:49:41 +08001668 struct net_device *dev = skb->dev;
1669 int len = skb->len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001670
Li RongQing8f849852014-01-04 13:57:59 +08001671 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
1672 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001673 skb->pkt_type = PACKET_HOST;
1674 skb->encapsulation = 0;
1675 skb->dev = dst_vxlan->dev;
1676 __skb_pull(skb, skb_network_offset(skb));
1677
Cong Wange4c7ed42013-08-31 13:44:33 +08001678 if (remote_ip->sa.sa_family == AF_INET) {
1679 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1680 loopback.sa.sa_family = AF_INET;
1681#if IS_ENABLED(CONFIG_IPV6)
1682 } else {
1683 loopback.sin6.sin6_addr = in6addr_loopback;
1684 loopback.sa.sa_family = AF_INET6;
1685#endif
1686 }
1687
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001688 if (dst_vxlan->flags & VXLAN_F_LEARN)
Cong Wange4c7ed42013-08-31 13:44:33 +08001689 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001690
1691 u64_stats_update_begin(&tx_stats->syncp);
1692 tx_stats->tx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08001693 tx_stats->tx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001694 u64_stats_update_end(&tx_stats->syncp);
1695
1696 if (netif_rx(skb) == NET_RX_SUCCESS) {
1697 u64_stats_update_begin(&rx_stats->syncp);
1698 rx_stats->rx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08001699 rx_stats->rx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001700 u64_stats_update_end(&rx_stats->syncp);
1701 } else {
Li RongQingce6502a2014-10-16 08:49:41 +08001702 dev->stats.rx_dropped++;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001703 }
1704}
1705
Stephen Hemminger4ad16932013-06-17 14:16:11 -07001706static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
1707 struct vxlan_rdst *rdst, bool did_rsc)
stephen hemmingerd3428942012-10-01 12:32:35 +00001708{
1709 struct vxlan_dev *vxlan = netdev_priv(dev);
Cong Wange4c7ed42013-08-31 13:44:33 +08001710 struct rtable *rt = NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +00001711 const struct iphdr *old_iph;
stephen hemmingerd3428942012-10-01 12:32:35 +00001712 struct flowi4 fl4;
Cong Wange4c7ed42013-08-31 13:44:33 +08001713 union vxlan_addr *dst;
1714 __be16 src_port = 0, dst_port;
Stephen Hemminger234f5b72013-06-17 14:16:41 -07001715 u32 vni;
stephen hemmingerd3428942012-10-01 12:32:35 +00001716 __be16 df = 0;
1717 __u8 tos, ttl;
Pravin B Shelar0e6fbc52013-06-17 17:49:56 -07001718 int err;
stephen hemmingerd3428942012-10-01 12:32:35 +00001719
stephen hemminger823aa872013-04-27 11:31:57 +00001720 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port;
David Stevens66817122013-03-15 04:35:51 +00001721 vni = rdst->remote_vni;
Cong Wange4c7ed42013-08-31 13:44:33 +08001722 dst = &rdst->remote_ip;
David Stevense4f67ad2012-11-20 02:50:14 +00001723
Cong Wange4c7ed42013-08-31 13:44:33 +08001724 if (vxlan_addr_any(dst)) {
David Stevense4f67ad2012-11-20 02:50:14 +00001725 if (did_rsc) {
David Stevense4f67ad2012-11-20 02:50:14 +00001726 /* short-circuited back to local bridge */
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001727 vxlan_encap_bypass(skb, vxlan, vxlan);
Stephen Hemminger4ad16932013-06-17 14:16:11 -07001728 return;
David Stevense4f67ad2012-11-20 02:50:14 +00001729 }
stephen hemmingeref59feb2012-10-09 20:35:46 +00001730 goto drop;
David Stevense4f67ad2012-11-20 02:50:14 +00001731 }
stephen hemmingeref59feb2012-10-09 20:35:46 +00001732
stephen hemmingerd3428942012-10-01 12:32:35 +00001733 old_iph = ip_hdr(skb);
1734
stephen hemmingerd3428942012-10-01 12:32:35 +00001735 ttl = vxlan->ttl;
Cong Wange4c7ed42013-08-31 13:44:33 +08001736 if (!ttl && vxlan_addr_multicast(dst))
stephen hemmingerd3428942012-10-01 12:32:35 +00001737 ttl = 1;
1738
1739 tos = vxlan->tos;
1740 if (tos == 1)
Pravin B Shelar206aaaf2013-03-25 14:49:53 +00001741 tos = ip_tunnel_get_dsfield(old_iph, skb);
stephen hemmingerd3428942012-10-01 12:32:35 +00001742
Tom Herbert535fb8d2014-07-01 21:32:49 -07001743 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->port_min,
1744 vxlan->port_max, true);
stephen hemmingerd3428942012-10-01 12:32:35 +00001745
Cong Wange4c7ed42013-08-31 13:44:33 +08001746 if (dst->sa.sa_family == AF_INET) {
1747 memset(&fl4, 0, sizeof(fl4));
1748 fl4.flowi4_oif = rdst->remote_ifindex;
1749 fl4.flowi4_tos = RT_TOS(tos);
1750 fl4.daddr = dst->sin.sin_addr.s_addr;
1751 fl4.saddr = vxlan->saddr.sin.sin_addr.s_addr;
stephen hemmingerca78f182012-10-09 20:35:48 +00001752
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02001753 rt = ip_route_output_key(vxlan->net, &fl4);
Cong Wange4c7ed42013-08-31 13:44:33 +08001754 if (IS_ERR(rt)) {
1755 netdev_dbg(dev, "no route to %pI4\n",
1756 &dst->sin.sin_addr.s_addr);
1757 dev->stats.tx_carrier_errors++;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001758 goto tx_error;
Cong Wange4c7ed42013-08-31 13:44:33 +08001759 }
1760
1761 if (rt->dst.dev == dev) {
1762 netdev_dbg(dev, "circular route to %pI4\n",
1763 &dst->sin.sin_addr.s_addr);
1764 dev->stats.collisions++;
Fan Dufffc15a2013-12-09 10:33:53 +08001765 goto rt_tx_error;
Cong Wange4c7ed42013-08-31 13:44:33 +08001766 }
1767
1768 /* Bypass encapsulation if the destination is local */
1769 if (rt->rt_flags & RTCF_LOCAL &&
1770 !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
1771 struct vxlan_dev *dst_vxlan;
1772
1773 ip_rt_put(rt);
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02001774 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
1775 dst->sa.sa_family, dst_port);
Cong Wange4c7ed42013-08-31 13:44:33 +08001776 if (!dst_vxlan)
1777 goto tx_error;
1778 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
1779 return;
1780 }
1781
1782 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
1783 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
1784
Andy Zhou3c4d1da2014-09-23 01:44:51 -07001785 err = vxlan_xmit_skb(vxlan->vn_sock, rt, skb,
1786 fl4.saddr, dst->sin.sin_addr.s_addr,
1787 tos, ttl, df, src_port, dst_port,
1788 htonl(vni << 8),
1789 !net_eq(vxlan->net, dev_net(vxlan->dev)));
Pravin B Shelar74f47272014-12-23 16:20:36 -08001790 if (err < 0) {
1791 /* skb is already freed. */
1792 skb = NULL;
Cong Wange4c7ed42013-08-31 13:44:33 +08001793 goto rt_tx_error;
Pravin B Shelar74f47272014-12-23 16:20:36 -08001794 }
1795
Cong Wange4c7ed42013-08-31 13:44:33 +08001796 iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
1797#if IS_ENABLED(CONFIG_IPV6)
1798 } else {
1799 struct sock *sk = vxlan->vn_sock->sock->sk;
1800 struct dst_entry *ndst;
1801 struct flowi6 fl6;
1802 u32 flags;
1803
1804 memset(&fl6, 0, sizeof(fl6));
1805 fl6.flowi6_oif = rdst->remote_ifindex;
1806 fl6.daddr = dst->sin6.sin6_addr;
1807 fl6.saddr = vxlan->saddr.sin6.sin6_addr;
Cong Wang8c1bb792013-09-02 10:06:51 +08001808 fl6.flowi6_proto = IPPROTO_UDP;
Cong Wange4c7ed42013-08-31 13:44:33 +08001809
1810 if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) {
1811 netdev_dbg(dev, "no route to %pI6\n",
1812 &dst->sin6.sin6_addr);
1813 dev->stats.tx_carrier_errors++;
1814 goto tx_error;
1815 }
1816
1817 if (ndst->dev == dev) {
1818 netdev_dbg(dev, "circular route to %pI6\n",
1819 &dst->sin6.sin6_addr);
1820 dst_release(ndst);
1821 dev->stats.collisions++;
1822 goto tx_error;
1823 }
1824
1825 /* Bypass encapsulation if the destination is local */
1826 flags = ((struct rt6_info *)ndst)->rt6i_flags;
1827 if (flags & RTF_LOCAL &&
1828 !(flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
1829 struct vxlan_dev *dst_vxlan;
1830
1831 dst_release(ndst);
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02001832 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
1833 dst->sa.sa_family, dst_port);
Cong Wange4c7ed42013-08-31 13:44:33 +08001834 if (!dst_vxlan)
1835 goto tx_error;
1836 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
1837 return;
1838 }
1839
1840 ttl = ttl ? : ip6_dst_hoplimit(ndst);
1841
Nicolas Dichtel11796182013-09-02 15:34:55 +02001842 err = vxlan6_xmit_skb(vxlan->vn_sock, ndst, skb,
Cong Wange4c7ed42013-08-31 13:44:33 +08001843 dev, &fl6.saddr, &fl6.daddr, 0, ttl,
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02001844 src_port, dst_port, htonl(vni << 8),
1845 !net_eq(vxlan->net, dev_net(vxlan->dev)));
Cong Wange4c7ed42013-08-31 13:44:33 +08001846#endif
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001847 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001848
Stephen Hemminger4ad16932013-06-17 14:16:11 -07001849 return;
stephen hemmingerd3428942012-10-01 12:32:35 +00001850
1851drop:
1852 dev->stats.tx_dropped++;
1853 goto tx_free;
1854
Pravin B Shelar49560532013-08-19 11:23:17 -07001855rt_tx_error:
1856 ip_rt_put(rt);
stephen hemmingerd3428942012-10-01 12:32:35 +00001857tx_error:
1858 dev->stats.tx_errors++;
1859tx_free:
1860 dev_kfree_skb(skb);
stephen hemmingerd3428942012-10-01 12:32:35 +00001861}
1862
David Stevens66817122013-03-15 04:35:51 +00001863/* Transmit local packets over Vxlan
1864 *
1865 * Outer IP header inherits ECN and DF from inner header.
1866 * Outer UDP destination is the VXLAN assigned port.
1867 * source port is based on hash of flow
1868 */
1869static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
1870{
1871 struct vxlan_dev *vxlan = netdev_priv(dev);
1872 struct ethhdr *eth;
1873 bool did_rsc = false;
Eric Dumazet8f646c92014-01-06 09:54:31 -08001874 struct vxlan_rdst *rdst, *fdst = NULL;
David Stevens66817122013-03-15 04:35:51 +00001875 struct vxlan_fdb *f;
David Stevens66817122013-03-15 04:35:51 +00001876
1877 skb_reset_mac_header(skb);
1878 eth = eth_hdr(skb);
1879
Cong Wangf564f452013-08-31 13:44:36 +08001880 if ((vxlan->flags & VXLAN_F_PROXY)) {
1881 if (ntohs(eth->h_proto) == ETH_P_ARP)
1882 return arp_reduce(dev, skb);
1883#if IS_ENABLED(CONFIG_IPV6)
1884 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
Li RongQing91269e32014-10-16 09:17:18 +08001885 pskb_may_pull(skb, sizeof(struct ipv6hdr)
1886 + sizeof(struct nd_msg)) &&
Cong Wangf564f452013-08-31 13:44:36 +08001887 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
1888 struct nd_msg *msg;
1889
1890 msg = (struct nd_msg *)skb_transport_header(skb);
1891 if (msg->icmph.icmp6_code == 0 &&
1892 msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
1893 return neigh_reduce(dev, skb);
1894 }
Li RongQing7a9f5262014-10-17 14:06:16 +08001895 eth = eth_hdr(skb);
Cong Wangf564f452013-08-31 13:44:36 +08001896#endif
1897 }
David Stevens66817122013-03-15 04:35:51 +00001898
1899 f = vxlan_find_mac(vxlan, eth->h_dest);
David Stevensae884082013-04-19 00:36:26 +00001900 did_rsc = false;
1901
1902 if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) &&
Cong Wange15a00a2013-08-31 13:44:34 +08001903 (ntohs(eth->h_proto) == ETH_P_IP ||
1904 ntohs(eth->h_proto) == ETH_P_IPV6)) {
David Stevensae884082013-04-19 00:36:26 +00001905 did_rsc = route_shortcircuit(dev, skb);
1906 if (did_rsc)
1907 f = vxlan_find_mac(vxlan, eth->h_dest);
1908 }
1909
David Stevens66817122013-03-15 04:35:51 +00001910 if (f == NULL) {
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03001911 f = vxlan_find_mac(vxlan, all_zeros_mac);
1912 if (f == NULL) {
1913 if ((vxlan->flags & VXLAN_F_L2MISS) &&
1914 !is_multicast_ether_addr(eth->h_dest))
1915 vxlan_fdb_miss(vxlan, eth->h_dest);
David Stevens66817122013-03-15 04:35:51 +00001916
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03001917 dev->stats.tx_dropped++;
Eric Dumazet8f646c92014-01-06 09:54:31 -08001918 kfree_skb(skb);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03001919 return NETDEV_TX_OK;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001920 }
David Stevens66817122013-03-15 04:35:51 +00001921 }
1922
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03001923 list_for_each_entry_rcu(rdst, &f->remotes, list) {
1924 struct sk_buff *skb1;
1925
Eric Dumazet8f646c92014-01-06 09:54:31 -08001926 if (!fdst) {
1927 fdst = rdst;
1928 continue;
1929 }
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03001930 skb1 = skb_clone(skb, GFP_ATOMIC);
1931 if (skb1)
1932 vxlan_xmit_one(skb1, dev, rdst, did_rsc);
1933 }
1934
Eric Dumazet8f646c92014-01-06 09:54:31 -08001935 if (fdst)
1936 vxlan_xmit_one(skb, dev, fdst, did_rsc);
1937 else
1938 kfree_skb(skb);
Stephen Hemminger4ad16932013-06-17 14:16:11 -07001939 return NETDEV_TX_OK;
David Stevens66817122013-03-15 04:35:51 +00001940}
1941
stephen hemmingerd3428942012-10-01 12:32:35 +00001942/* Walk the forwarding table and purge stale entries */
1943static void vxlan_cleanup(unsigned long arg)
1944{
1945 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
1946 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
1947 unsigned int h;
1948
1949 if (!netif_running(vxlan->dev))
1950 return;
1951
1952 spin_lock_bh(&vxlan->hash_lock);
1953 for (h = 0; h < FDB_HASH_SIZE; ++h) {
1954 struct hlist_node *p, *n;
1955 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
1956 struct vxlan_fdb *f
1957 = container_of(p, struct vxlan_fdb, hlist);
1958 unsigned long timeout;
1959
stephen hemminger3c172862012-10-26 06:24:34 +00001960 if (f->state & NUD_PERMANENT)
stephen hemmingerd3428942012-10-01 12:32:35 +00001961 continue;
1962
1963 timeout = f->used + vxlan->age_interval * HZ;
1964 if (time_before_eq(timeout, jiffies)) {
1965 netdev_dbg(vxlan->dev,
1966 "garbage collect %pM\n",
1967 f->eth_addr);
1968 f->state = NUD_STALE;
1969 vxlan_fdb_destroy(vxlan, f);
1970 } else if (time_before(timeout, next_timer))
1971 next_timer = timeout;
1972 }
1973 }
1974 spin_unlock_bh(&vxlan->hash_lock);
1975
1976 mod_timer(&vxlan->age_timer, next_timer);
1977}
1978
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07001979static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
1980{
1981 __u32 vni = vxlan->default_dst.remote_vni;
1982
1983 vxlan->vn_sock = vs;
1984 hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
1985}
1986
stephen hemmingerd3428942012-10-01 12:32:35 +00001987/* Setup stats when device is created */
1988static int vxlan_init(struct net_device *dev)
1989{
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001990 struct vxlan_dev *vxlan = netdev_priv(dev);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02001991 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001992 struct vxlan_sock *vs;
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02001993 bool ipv6 = vxlan->flags & VXLAN_F_IPV6;
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001994
WANG Cong1c213bd2014-02-13 11:46:28 -08001995 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
Pravin B Shelare8171042013-03-25 14:49:46 +00001996 if (!dev->tstats)
stephen hemmingerd3428942012-10-01 12:32:35 +00001997 return -ENOMEM;
1998
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001999 spin_lock(&vn->sock_lock);
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02002000 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
2001 vxlan->dst_port);
Marcelo Leitner00c83b02014-12-11 10:02:22 -02002002 if (vs && atomic_add_unless(&vs->refcnt, 1, 0)) {
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002003 /* If we have a socket with same port already, reuse it */
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002004 vxlan_vs_add_dev(vs, vxlan);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002005 } else {
2006 /* otherwise make new socket outside of RTNL */
2007 dev_hold(dev);
2008 queue_work(vxlan_wq, &vxlan->sock_work);
2009 }
2010 spin_unlock(&vn->sock_lock);
2011
stephen hemmingerd3428942012-10-01 12:32:35 +00002012 return 0;
2013}
2014
Stephen Hemmingerba609e92013-06-25 17:06:01 -07002015static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan)
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002016{
2017 struct vxlan_fdb *f;
2018
2019 spin_lock_bh(&vxlan->hash_lock);
2020 f = __vxlan_find_mac(vxlan, all_zeros_mac);
2021 if (f)
2022 vxlan_fdb_destroy(vxlan, f);
2023 spin_unlock_bh(&vxlan->hash_lock);
2024}
2025
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002026static void vxlan_uninit(struct net_device *dev)
2027{
2028 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002029 struct vxlan_sock *vs = vxlan->vn_sock;
2030
Stephen Hemmingerba609e92013-06-25 17:06:01 -07002031 vxlan_fdb_delete_default(vxlan);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002032
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002033 if (vs)
Pravin B Shelar012a5722013-08-19 11:23:07 -07002034 vxlan_sock_release(vs);
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002035 free_percpu(dev->tstats);
2036}
2037
stephen hemmingerd3428942012-10-01 12:32:35 +00002038/* Start ageing timer and join group when device is brought up */
2039static int vxlan_open(struct net_device *dev)
2040{
2041 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002042 struct vxlan_sock *vs = vxlan->vn_sock;
2043
2044 /* socket hasn't been created */
2045 if (!vs)
2046 return -ENOTCONN;
stephen hemmingerd3428942012-10-01 12:32:35 +00002047
Gao feng79d4a942013-12-10 16:37:32 +08002048 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002049 vxlan_sock_hold(vs);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07002050 dev_hold(dev);
stephen hemminger3fc2de22013-07-18 08:40:15 -07002051 queue_work(vxlan_wq, &vxlan->igmp_join);
stephen hemmingerd3428942012-10-01 12:32:35 +00002052 }
2053
2054 if (vxlan->age_interval)
2055 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2056
2057 return 0;
2058}
2059
2060/* Purge the forwarding table */
2061static void vxlan_flush(struct vxlan_dev *vxlan)
2062{
Cong Wang31fec5a2013-05-27 22:35:52 +00002063 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002064
2065 spin_lock_bh(&vxlan->hash_lock);
2066 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2067 struct hlist_node *p, *n;
2068 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2069 struct vxlan_fdb *f
2070 = container_of(p, struct vxlan_fdb, hlist);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002071 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2072 if (!is_zero_ether_addr(f->eth_addr))
2073 vxlan_fdb_destroy(vxlan, f);
stephen hemmingerd3428942012-10-01 12:32:35 +00002074 }
2075 }
2076 spin_unlock_bh(&vxlan->hash_lock);
2077}
2078
2079/* Cleanup timer and forwarding table on shutdown */
2080static int vxlan_stop(struct net_device *dev)
2081{
2082 struct vxlan_dev *vxlan = netdev_priv(dev);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002083 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002084 struct vxlan_sock *vs = vxlan->vn_sock;
stephen hemmingerd3428942012-10-01 12:32:35 +00002085
Cong Wange4c7ed42013-08-31 13:44:33 +08002086 if (vs && vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
Gao feng95ab0992013-12-10 16:37:33 +08002087 !vxlan_group_used(vn, vxlan)) {
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002088 vxlan_sock_hold(vs);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07002089 dev_hold(dev);
stephen hemminger3fc2de22013-07-18 08:40:15 -07002090 queue_work(vxlan_wq, &vxlan->igmp_leave);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07002091 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002092
2093 del_timer_sync(&vxlan->age_timer);
2094
2095 vxlan_flush(vxlan);
2096
2097 return 0;
2098}
2099
stephen hemmingerd3428942012-10-01 12:32:35 +00002100/* Stub, nothing needs to be done. */
2101static void vxlan_set_multicast_list(struct net_device *dev)
2102{
2103}
2104
Daniel Borkmann345010b2013-12-18 00:21:08 +01002105static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2106{
2107 struct vxlan_dev *vxlan = netdev_priv(dev);
2108 struct vxlan_rdst *dst = &vxlan->default_dst;
2109 struct net_device *lowerdev;
2110 int max_mtu;
2111
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002112 lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex);
Daniel Borkmann345010b2013-12-18 00:21:08 +01002113 if (lowerdev == NULL)
2114 return eth_change_mtu(dev, new_mtu);
2115
2116 if (dst->remote_ip.sa.sa_family == AF_INET6)
2117 max_mtu = lowerdev->mtu - VXLAN6_HEADROOM;
2118 else
2119 max_mtu = lowerdev->mtu - VXLAN_HEADROOM;
2120
2121 if (new_mtu < 68 || new_mtu > max_mtu)
2122 return -EINVAL;
2123
2124 dev->mtu = new_mtu;
2125 return 0;
2126}
2127
stephen hemmingerd3428942012-10-01 12:32:35 +00002128static const struct net_device_ops vxlan_netdev_ops = {
2129 .ndo_init = vxlan_init,
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002130 .ndo_uninit = vxlan_uninit,
stephen hemmingerd3428942012-10-01 12:32:35 +00002131 .ndo_open = vxlan_open,
2132 .ndo_stop = vxlan_stop,
2133 .ndo_start_xmit = vxlan_xmit,
Pravin B Shelare8171042013-03-25 14:49:46 +00002134 .ndo_get_stats64 = ip_tunnel_get_stats64,
stephen hemmingerd3428942012-10-01 12:32:35 +00002135 .ndo_set_rx_mode = vxlan_set_multicast_list,
Daniel Borkmann345010b2013-12-18 00:21:08 +01002136 .ndo_change_mtu = vxlan_change_mtu,
stephen hemmingerd3428942012-10-01 12:32:35 +00002137 .ndo_validate_addr = eth_validate_addr,
2138 .ndo_set_mac_address = eth_mac_addr,
2139 .ndo_fdb_add = vxlan_fdb_add,
2140 .ndo_fdb_del = vxlan_fdb_delete,
2141 .ndo_fdb_dump = vxlan_fdb_dump,
2142};
2143
2144/* Info for udev, that this is a virtual tunnel endpoint */
2145static struct device_type vxlan_type = {
2146 .name = "vxlan",
2147};
2148
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002149/* Calls the ndo_add_vxlan_port of the caller in order to
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002150 * supply the listening VXLAN udp ports. Callers are expected
2151 * to implement the ndo_add_vxlan_port.
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002152 */
2153void vxlan_get_rx_port(struct net_device *dev)
2154{
2155 struct vxlan_sock *vs;
2156 struct net *net = dev_net(dev);
2157 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2158 sa_family_t sa_family;
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002159 __be16 port;
2160 unsigned int i;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002161
2162 spin_lock(&vn->sock_lock);
2163 for (i = 0; i < PORT_HASH_SIZE; ++i) {
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002164 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2165 port = inet_sk(vs->sock->sk)->inet_sport;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002166 sa_family = vs->sock->sk->sk_family;
2167 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
2168 port);
2169 }
2170 }
2171 spin_unlock(&vn->sock_lock);
2172}
2173EXPORT_SYMBOL_GPL(vxlan_get_rx_port);
2174
stephen hemmingerd3428942012-10-01 12:32:35 +00002175/* Initialize the device structure. */
2176static void vxlan_setup(struct net_device *dev)
2177{
2178 struct vxlan_dev *vxlan = netdev_priv(dev);
Cong Wang31fec5a2013-05-27 22:35:52 +00002179 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002180
2181 eth_hw_addr_random(dev);
2182 ether_setup(dev);
Cong Wange4c7ed42013-08-31 13:44:33 +08002183 if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6)
Cong Wang2853af62014-06-12 11:53:10 -07002184 dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM;
Cong Wange4c7ed42013-08-31 13:44:33 +08002185 else
Cong Wang2853af62014-06-12 11:53:10 -07002186 dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM;
stephen hemmingerd3428942012-10-01 12:32:35 +00002187
2188 dev->netdev_ops = &vxlan_netdev_ops;
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002189 dev->destructor = free_netdev;
stephen hemmingerd3428942012-10-01 12:32:35 +00002190 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2191
2192 dev->tx_queue_len = 0;
2193 dev->features |= NETIF_F_LLTX;
Joseph Gasparakisd6727fe2012-12-07 14:14:16 +00002194 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002195 dev->features |= NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002196 dev->features |= NETIF_F_GSO_SOFTWARE;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002197
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07002198 dev->vlan_features = dev->features;
2199 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002200 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002201 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07002202 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
Eric Dumazet02875872014-10-05 18:38:35 -07002203 netif_keep_dst(dev);
stephen hemminger6602d002012-12-31 12:00:21 +00002204 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
stephen hemmingerd3428942012-10-01 12:32:35 +00002205
stephen hemminger553675f2013-05-16 11:35:20 +00002206 INIT_LIST_HEAD(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00002207 spin_lock_init(&vxlan->hash_lock);
stephen hemminger3fc2de22013-07-18 08:40:15 -07002208 INIT_WORK(&vxlan->igmp_join, vxlan_igmp_join);
2209 INIT_WORK(&vxlan->igmp_leave, vxlan_igmp_leave);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002210 INIT_WORK(&vxlan->sock_work, vxlan_sock_work);
stephen hemmingerd3428942012-10-01 12:32:35 +00002211
2212 init_timer_deferrable(&vxlan->age_timer);
2213 vxlan->age_timer.function = vxlan_cleanup;
2214 vxlan->age_timer.data = (unsigned long) vxlan;
2215
stephen hemminger823aa872013-04-27 11:31:57 +00002216 vxlan->dst_port = htons(vxlan_port);
stephen hemminger05f47d62012-10-09 20:35:50 +00002217
stephen hemmingerd3428942012-10-01 12:32:35 +00002218 vxlan->dev = dev;
2219
2220 for (h = 0; h < FDB_HASH_SIZE; ++h)
2221 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2222}
2223
2224static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2225 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
stephen hemminger5d174dd2013-04-27 11:31:55 +00002226 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002227 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002228 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2229 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002230 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002231 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2232 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
2233 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2234 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2235 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
stephen hemminger05f47d62012-10-09 20:35:50 +00002236 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
David Stevense4f67ad2012-11-20 02:50:14 +00002237 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2238 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2239 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2240 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
stephen hemminger823aa872013-04-27 11:31:57 +00002241 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
Tom Herbert5c91ae02014-11-06 18:06:01 -08002242 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2243 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2244 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
stephen hemmingerd3428942012-10-01 12:32:35 +00002245};
2246
2247static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
2248{
2249 if (tb[IFLA_ADDRESS]) {
2250 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2251 pr_debug("invalid link address (not ethernet)\n");
2252 return -EINVAL;
2253 }
2254
2255 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2256 pr_debug("invalid all zero ethernet address\n");
2257 return -EADDRNOTAVAIL;
2258 }
2259 }
2260
2261 if (!data)
2262 return -EINVAL;
2263
2264 if (data[IFLA_VXLAN_ID]) {
2265 __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2266 if (id >= VXLAN_VID_MASK)
2267 return -ERANGE;
2268 }
2269
stephen hemminger05f47d62012-10-09 20:35:50 +00002270 if (data[IFLA_VXLAN_PORT_RANGE]) {
2271 const struct ifla_vxlan_port_range *p
2272 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2273
2274 if (ntohs(p->high) < ntohs(p->low)) {
2275 pr_debug("port range %u .. %u not valid\n",
2276 ntohs(p->low), ntohs(p->high));
2277 return -EINVAL;
2278 }
2279 }
2280
stephen hemmingerd3428942012-10-01 12:32:35 +00002281 return 0;
2282}
2283
Yan Burman1b13c972013-01-29 23:43:07 +00002284static void vxlan_get_drvinfo(struct net_device *netdev,
2285 struct ethtool_drvinfo *drvinfo)
2286{
2287 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2288 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2289}
2290
2291static const struct ethtool_ops vxlan_ethtool_ops = {
2292 .get_drvinfo = vxlan_get_drvinfo,
2293 .get_link = ethtool_op_get_link,
2294};
2295
stephen hemminger553675f2013-05-16 11:35:20 +00002296static void vxlan_del_work(struct work_struct *work)
2297{
2298 struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
Andy Zhouacbf74a2014-09-16 17:31:18 -07002299 udp_tunnel_sock_release(vs->sock);
stephen hemminger553675f2013-05-16 11:35:20 +00002300 kfree_rcu(vs, rcu);
2301}
2302
Tom Herbert3ee64f32014-07-13 19:49:42 -07002303static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2304 __be16 port, u32 flags)
stephen hemminger553675f2013-05-16 11:35:20 +00002305{
Cong Wange4c7ed42013-08-31 13:44:33 +08002306 struct socket *sock;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002307 struct udp_port_cfg udp_conf;
2308 int err;
Cong Wange4c7ed42013-08-31 13:44:33 +08002309
Tom Herbert3ee64f32014-07-13 19:49:42 -07002310 memset(&udp_conf, 0, sizeof(udp_conf));
2311
2312 if (ipv6) {
2313 udp_conf.family = AF_INET6;
2314 udp_conf.use_udp6_tx_checksums =
Alexander Duyck3dc2b6a2014-11-24 20:08:38 -08002315 !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
Tom Herbert3ee64f32014-07-13 19:49:42 -07002316 udp_conf.use_udp6_rx_checksums =
Alexander Duyck3dc2b6a2014-11-24 20:08:38 -08002317 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
Tom Herbert3ee64f32014-07-13 19:49:42 -07002318 } else {
2319 udp_conf.family = AF_INET;
2320 udp_conf.local_ip.s_addr = INADDR_ANY;
2321 udp_conf.use_udp_checksums =
2322 !!(flags & VXLAN_F_UDP_CSUM);
Cong Wange4c7ed42013-08-31 13:44:33 +08002323 }
2324
Tom Herbert3ee64f32014-07-13 19:49:42 -07002325 udp_conf.local_udp_port = port;
Cong Wange4c7ed42013-08-31 13:44:33 +08002326
Tom Herbert3ee64f32014-07-13 19:49:42 -07002327 /* Open UDP socket */
2328 err = udp_sock_create(net, &udp_conf, &sock);
2329 if (err < 0)
2330 return ERR_PTR(err);
Cong Wange4c7ed42013-08-31 13:44:33 +08002331
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002332 return sock;
Cong Wange4c7ed42013-08-31 13:44:33 +08002333}
2334
2335/* Create new listen socket if needed */
2336static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
Tom Herbert359a0ea2014-06-04 17:20:29 -07002337 vxlan_rcv_t *rcv, void *data,
2338 u32 flags)
Cong Wange4c7ed42013-08-31 13:44:33 +08002339{
2340 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2341 struct vxlan_sock *vs;
2342 struct socket *sock;
Cong Wang31fec5a2013-05-27 22:35:52 +00002343 unsigned int h;
Tom Herbert359a0ea2014-06-04 17:20:29 -07002344 bool ipv6 = !!(flags & VXLAN_F_IPV6);
Andy Zhouacbf74a2014-09-16 17:31:18 -07002345 struct udp_tunnel_sock_cfg tunnel_cfg;
stephen hemminger553675f2013-05-16 11:35:20 +00002346
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02002347 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
Cong Wange4c7ed42013-08-31 13:44:33 +08002348 if (!vs)
stephen hemminger553675f2013-05-16 11:35:20 +00002349 return ERR_PTR(-ENOMEM);
2350
2351 for (h = 0; h < VNI_HASH_SIZE; ++h)
2352 INIT_HLIST_HEAD(&vs->vni_list[h]);
2353
2354 INIT_WORK(&vs->del_work, vxlan_del_work);
2355
Tom Herbert3ee64f32014-07-13 19:49:42 -07002356 sock = vxlan_create_sock(net, ipv6, port, flags);
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002357 if (IS_ERR(sock)) {
stephen hemminger553675f2013-05-16 11:35:20 +00002358 kfree(vs);
Duan Jionge50fddc2013-11-01 13:09:43 +08002359 return ERR_CAST(sock);
stephen hemminger553675f2013-05-16 11:35:20 +00002360 }
2361
Cong Wange4c7ed42013-08-31 13:44:33 +08002362 vs->sock = sock;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002363 atomic_set(&vs->refcnt, 1);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07002364 vs->rcv = rcv;
Pravin B Shelar012a5722013-08-19 11:23:07 -07002365 vs->data = data;
stephen hemminger553675f2013-05-16 11:35:20 +00002366
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02002367 /* Initialize the vxlan udp offloads structure */
2368 vs->udp_offloads.port = port;
2369 vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive;
2370 vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete;
2371
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002372 spin_lock(&vn->sock_lock);
2373 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02002374 vxlan_notify_add_rx_port(vs);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002375 spin_unlock(&vn->sock_lock);
stephen hemminger553675f2013-05-16 11:35:20 +00002376
2377 /* Mark socket as an encapsulation socket. */
Andy Zhouacbf74a2014-09-16 17:31:18 -07002378 tunnel_cfg.sk_user_data = vs;
2379 tunnel_cfg.encap_type = 1;
2380 tunnel_cfg.encap_rcv = vxlan_udp_encap_recv;
2381 tunnel_cfg.encap_destroy = NULL;
2382
2383 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
Cong Wange4c7ed42013-08-31 13:44:33 +08002384
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002385 return vs;
2386}
stephen hemminger553675f2013-05-16 11:35:20 +00002387
Pravin B Shelar012a5722013-08-19 11:23:07 -07002388struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
2389 vxlan_rcv_t *rcv, void *data,
Tom Herbert359a0ea2014-06-04 17:20:29 -07002390 bool no_share, u32 flags)
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002391{
2392 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2393 struct vxlan_sock *vs;
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02002394 bool ipv6 = flags & VXLAN_F_IPV6;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002395
Tom Herbert359a0ea2014-06-04 17:20:29 -07002396 vs = vxlan_socket_create(net, port, rcv, data, flags);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002397 if (!IS_ERR(vs))
2398 return vs;
2399
Pravin B Shelar012a5722013-08-19 11:23:07 -07002400 if (no_share) /* Return error if sharing is not allowed. */
2401 return vs;
2402
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002403 spin_lock(&vn->sock_lock);
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02002404 vs = vxlan_find_sock(net, ipv6 ? AF_INET6 : AF_INET, port);
Marcelo Leitner00c83b02014-12-11 10:02:22 -02002405 if (vs && ((vs->rcv != rcv) ||
2406 !atomic_add_unless(&vs->refcnt, 1, 0)))
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07002407 vs = ERR_PTR(-EBUSY);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07002408 spin_unlock(&vn->sock_lock);
2409
2410 if (!vs)
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002411 vs = ERR_PTR(-EINVAL);
2412
stephen hemminger553675f2013-05-16 11:35:20 +00002413 return vs;
2414}
Pravin B Shelar012a5722013-08-19 11:23:07 -07002415EXPORT_SYMBOL_GPL(vxlan_sock_add);
stephen hemminger553675f2013-05-16 11:35:20 +00002416
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002417/* Scheduled at device creation to bind to a socket */
2418static void vxlan_sock_work(struct work_struct *work)
2419{
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002420 struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, sock_work);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002421 struct net *net = vxlan->net;
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002422 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002423 __be16 port = vxlan->dst_port;
2424 struct vxlan_sock *nvs;
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002425
Tom Herbert359a0ea2014-06-04 17:20:29 -07002426 nvs = vxlan_sock_add(net, port, vxlan_rcv, NULL, false, vxlan->flags);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002427 spin_lock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002428 if (!IS_ERR(nvs))
2429 vxlan_vs_add_dev(nvs, vxlan);
2430 spin_unlock(&vn->sock_lock);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002431
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002432 dev_put(vxlan->dev);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002433}
2434
stephen hemmingerd3428942012-10-01 12:32:35 +00002435static int vxlan_newlink(struct net *net, struct net_device *dev,
2436 struct nlattr *tb[], struct nlattr *data[])
2437{
stephen hemminger553675f2013-05-16 11:35:20 +00002438 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
stephen hemmingerd3428942012-10-01 12:32:35 +00002439 struct vxlan_dev *vxlan = netdev_priv(dev);
Atzm Watanabec7995c42013-04-16 02:50:52 +00002440 struct vxlan_rdst *dst = &vxlan->default_dst;
stephen hemmingerd3428942012-10-01 12:32:35 +00002441 __u32 vni;
2442 int err;
Cong Wange4c7ed42013-08-31 13:44:33 +08002443 bool use_ipv6 = false;
stephen hemmingerd3428942012-10-01 12:32:35 +00002444
2445 if (!data[IFLA_VXLAN_ID])
2446 return -EINVAL;
2447
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002448 vxlan->net = dev_net(dev);
2449
stephen hemmingerd3428942012-10-01 12:32:35 +00002450 vni = nla_get_u32(data[IFLA_VXLAN_ID]);
Atzm Watanabec7995c42013-04-16 02:50:52 +00002451 dst->remote_vni = vni;
stephen hemmingerd3428942012-10-01 12:32:35 +00002452
Mike Rapoport5933a7b2014-04-01 09:23:01 +03002453 /* Unless IPv6 is explicitly requested, assume IPv4 */
2454 dst->remote_ip.sa.sa_family = AF_INET;
Cong Wange4c7ed42013-08-31 13:44:33 +08002455 if (data[IFLA_VXLAN_GROUP]) {
2456 dst->remote_ip.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_GROUP]);
Cong Wange4c7ed42013-08-31 13:44:33 +08002457 } else if (data[IFLA_VXLAN_GROUP6]) {
2458 if (!IS_ENABLED(CONFIG_IPV6))
2459 return -EPFNOSUPPORT;
stephen hemmingerd3428942012-10-01 12:32:35 +00002460
Cong Wange4c7ed42013-08-31 13:44:33 +08002461 nla_memcpy(&dst->remote_ip.sin6.sin6_addr, data[IFLA_VXLAN_GROUP6],
2462 sizeof(struct in6_addr));
2463 dst->remote_ip.sa.sa_family = AF_INET6;
2464 use_ipv6 = true;
2465 }
2466
2467 if (data[IFLA_VXLAN_LOCAL]) {
2468 vxlan->saddr.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_LOCAL]);
2469 vxlan->saddr.sa.sa_family = AF_INET;
2470 } else if (data[IFLA_VXLAN_LOCAL6]) {
2471 if (!IS_ENABLED(CONFIG_IPV6))
2472 return -EPFNOSUPPORT;
2473
2474 /* TODO: respect scope id */
2475 nla_memcpy(&vxlan->saddr.sin6.sin6_addr, data[IFLA_VXLAN_LOCAL6],
2476 sizeof(struct in6_addr));
2477 vxlan->saddr.sa.sa_family = AF_INET6;
2478 use_ipv6 = true;
2479 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002480
stephen hemminger34e02aa2012-10-09 20:35:53 +00002481 if (data[IFLA_VXLAN_LINK] &&
Atzm Watanabec7995c42013-04-16 02:50:52 +00002482 (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) {
stephen hemminger34e02aa2012-10-09 20:35:53 +00002483 struct net_device *lowerdev
Atzm Watanabec7995c42013-04-16 02:50:52 +00002484 = __dev_get_by_index(net, dst->remote_ifindex);
stephen hemmingerd3428942012-10-01 12:32:35 +00002485
stephen hemminger34e02aa2012-10-09 20:35:53 +00002486 if (!lowerdev) {
Atzm Watanabec7995c42013-04-16 02:50:52 +00002487 pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
stephen hemminger34e02aa2012-10-09 20:35:53 +00002488 return -ENODEV;
stephen hemmingerd3428942012-10-01 12:32:35 +00002489 }
stephen hemminger34e02aa2012-10-09 20:35:53 +00002490
Cong Wange4c7ed42013-08-31 13:44:33 +08002491#if IS_ENABLED(CONFIG_IPV6)
2492 if (use_ipv6) {
2493 struct inet6_dev *idev = __in6_dev_get(lowerdev);
2494 if (idev && idev->cnf.disable_ipv6) {
2495 pr_info("IPv6 is disabled via sysctl\n");
2496 return -EPERM;
2497 }
2498 vxlan->flags |= VXLAN_F_IPV6;
2499 }
2500#endif
2501
stephen hemminger34e02aa2012-10-09 20:35:53 +00002502 if (!tb[IFLA_MTU])
Cong Wange4c7ed42013-08-31 13:44:33 +08002503 dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
Alexander Duyck1ba56fb2012-11-13 13:10:59 +00002504
Cong Wang2853af62014-06-12 11:53:10 -07002505 dev->needed_headroom = lowerdev->hard_header_len +
Cong Wange4c7ed42013-08-31 13:44:33 +08002506 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
fan.du7bda7012014-01-03 10:18:58 +08002507 } else if (use_ipv6)
2508 vxlan->flags |= VXLAN_F_IPV6;
stephen hemmingerd3428942012-10-01 12:32:35 +00002509
2510 if (data[IFLA_VXLAN_TOS])
2511 vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
2512
Vincent Bernatafb97182012-10-30 10:27:16 +00002513 if (data[IFLA_VXLAN_TTL])
2514 vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
2515
stephen hemmingerd3428942012-10-01 12:32:35 +00002516 if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
David Stevense4f67ad2012-11-20 02:50:14 +00002517 vxlan->flags |= VXLAN_F_LEARN;
stephen hemmingerd3428942012-10-01 12:32:35 +00002518
2519 if (data[IFLA_VXLAN_AGEING])
2520 vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
2521 else
2522 vxlan->age_interval = FDB_AGE_DEFAULT;
2523
David Stevense4f67ad2012-11-20 02:50:14 +00002524 if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
2525 vxlan->flags |= VXLAN_F_PROXY;
2526
2527 if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
2528 vxlan->flags |= VXLAN_F_RSC;
2529
2530 if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
2531 vxlan->flags |= VXLAN_F_L2MISS;
2532
2533 if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
2534 vxlan->flags |= VXLAN_F_L3MISS;
2535
stephen hemmingerd3428942012-10-01 12:32:35 +00002536 if (data[IFLA_VXLAN_LIMIT])
2537 vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
2538
stephen hemminger05f47d62012-10-09 20:35:50 +00002539 if (data[IFLA_VXLAN_PORT_RANGE]) {
2540 const struct ifla_vxlan_port_range *p
2541 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2542 vxlan->port_min = ntohs(p->low);
2543 vxlan->port_max = ntohs(p->high);
2544 }
2545
stephen hemminger823aa872013-04-27 11:31:57 +00002546 if (data[IFLA_VXLAN_PORT])
2547 vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
2548
Tom Herbert359a0ea2014-06-04 17:20:29 -07002549 if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
2550 vxlan->flags |= VXLAN_F_UDP_CSUM;
2551
2552 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
2553 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
2554 vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
2555
2556 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
2557 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
2558 vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
2559
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02002560 if (vxlan_find_vni(net, vni, use_ipv6 ? AF_INET6 : AF_INET,
2561 vxlan->dst_port)) {
stephen hemminger553675f2013-05-16 11:35:20 +00002562 pr_info("duplicate VNI %u\n", vni);
2563 return -EEXIST;
2564 }
2565
Wilfried Klaebe7ad24ea2014-05-11 00:12:32 +00002566 dev->ethtool_ops = &vxlan_ethtool_ops;
Yan Burman1b13c972013-01-29 23:43:07 +00002567
Sridhar Samudrala2936b6a2013-09-17 12:12:40 -07002568 /* create an fdb entry for a valid default destination */
2569 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
2570 err = vxlan_fdb_create(vxlan, all_zeros_mac,
2571 &vxlan->default_dst.remote_ip,
2572 NUD_REACHABLE|NUD_PERMANENT,
2573 NLM_F_EXCL|NLM_F_CREATE,
2574 vxlan->dst_port,
2575 vxlan->default_dst.remote_vni,
2576 vxlan->default_dst.remote_ifindex,
2577 NTF_SELF);
2578 if (err)
2579 return err;
2580 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002581
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002582 err = register_netdevice(dev);
2583 if (err) {
Stephen Hemmingerba609e92013-06-25 17:06:01 -07002584 vxlan_fdb_delete_default(vxlan);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002585 return err;
2586 }
2587
stephen hemminger553675f2013-05-16 11:35:20 +00002588 list_add(&vxlan->next, &vn->vxlan_list);
stephen hemminger553675f2013-05-16 11:35:20 +00002589
2590 return 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00002591}
2592
2593static void vxlan_dellink(struct net_device *dev, struct list_head *head)
2594{
2595 struct vxlan_dev *vxlan = netdev_priv(dev);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002596 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
stephen hemmingerd3428942012-10-01 12:32:35 +00002597
stephen hemmingerfe5c3562013-07-13 10:18:18 -07002598 spin_lock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002599 if (!hlist_unhashed(&vxlan->hlist))
2600 hlist_del_rcu(&vxlan->hlist);
stephen hemmingerfe5c3562013-07-13 10:18:18 -07002601 spin_unlock(&vn->sock_lock);
2602
stephen hemminger553675f2013-05-16 11:35:20 +00002603 list_del(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00002604 unregister_netdevice_queue(dev, head);
2605}
2606
2607static size_t vxlan_get_size(const struct net_device *dev)
2608{
2609
2610 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
Cong Wange4c7ed42013-08-31 13:44:33 +08002611 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00002612 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
Cong Wange4c7ed42013-08-31 13:44:33 +08002613 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00002614 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
2615 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
2616 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
David Stevense4f67ad2012-11-20 02:50:14 +00002617 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
2618 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
2619 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
2620 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
stephen hemmingerd3428942012-10-01 12:32:35 +00002621 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
2622 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
stephen hemminger05f47d62012-10-09 20:35:50 +00002623 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
Tom Herbert359a0ea2014-06-04 17:20:29 -07002624 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
2625 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
2626 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
2627 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
stephen hemmingerd3428942012-10-01 12:32:35 +00002628 0;
2629}
2630
2631static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
2632{
2633 const struct vxlan_dev *vxlan = netdev_priv(dev);
Atzm Watanabec7995c42013-04-16 02:50:52 +00002634 const struct vxlan_rdst *dst = &vxlan->default_dst;
stephen hemminger05f47d62012-10-09 20:35:50 +00002635 struct ifla_vxlan_port_range ports = {
2636 .low = htons(vxlan->port_min),
2637 .high = htons(vxlan->port_max),
2638 };
stephen hemmingerd3428942012-10-01 12:32:35 +00002639
Atzm Watanabec7995c42013-04-16 02:50:52 +00002640 if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni))
stephen hemmingerd3428942012-10-01 12:32:35 +00002641 goto nla_put_failure;
2642
Cong Wange4c7ed42013-08-31 13:44:33 +08002643 if (!vxlan_addr_any(&dst->remote_ip)) {
2644 if (dst->remote_ip.sa.sa_family == AF_INET) {
2645 if (nla_put_be32(skb, IFLA_VXLAN_GROUP,
2646 dst->remote_ip.sin.sin_addr.s_addr))
2647 goto nla_put_failure;
2648#if IS_ENABLED(CONFIG_IPV6)
2649 } else {
2650 if (nla_put(skb, IFLA_VXLAN_GROUP6, sizeof(struct in6_addr),
2651 &dst->remote_ip.sin6.sin6_addr))
2652 goto nla_put_failure;
2653#endif
2654 }
2655 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002656
Atzm Watanabec7995c42013-04-16 02:50:52 +00002657 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
stephen hemmingerd3428942012-10-01 12:32:35 +00002658 goto nla_put_failure;
2659
Cong Wange4c7ed42013-08-31 13:44:33 +08002660 if (!vxlan_addr_any(&vxlan->saddr)) {
2661 if (vxlan->saddr.sa.sa_family == AF_INET) {
2662 if (nla_put_be32(skb, IFLA_VXLAN_LOCAL,
2663 vxlan->saddr.sin.sin_addr.s_addr))
2664 goto nla_put_failure;
2665#if IS_ENABLED(CONFIG_IPV6)
2666 } else {
2667 if (nla_put(skb, IFLA_VXLAN_LOCAL6, sizeof(struct in6_addr),
2668 &vxlan->saddr.sin6.sin6_addr))
2669 goto nla_put_failure;
2670#endif
2671 }
2672 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002673
2674 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) ||
2675 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) ||
David Stevense4f67ad2012-11-20 02:50:14 +00002676 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
2677 !!(vxlan->flags & VXLAN_F_LEARN)) ||
2678 nla_put_u8(skb, IFLA_VXLAN_PROXY,
2679 !!(vxlan->flags & VXLAN_F_PROXY)) ||
2680 nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) ||
2681 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
2682 !!(vxlan->flags & VXLAN_F_L2MISS)) ||
2683 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
2684 !!(vxlan->flags & VXLAN_F_L3MISS)) ||
stephen hemmingerd3428942012-10-01 12:32:35 +00002685 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) ||
stephen hemminger823aa872013-04-27 11:31:57 +00002686 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07002687 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port) ||
2688 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
2689 !!(vxlan->flags & VXLAN_F_UDP_CSUM)) ||
2690 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
2691 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
2692 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
2693 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)))
stephen hemmingerd3428942012-10-01 12:32:35 +00002694 goto nla_put_failure;
2695
stephen hemminger05f47d62012-10-09 20:35:50 +00002696 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
2697 goto nla_put_failure;
2698
stephen hemmingerd3428942012-10-01 12:32:35 +00002699 return 0;
2700
2701nla_put_failure:
2702 return -EMSGSIZE;
2703}
2704
2705static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
2706 .kind = "vxlan",
2707 .maxtype = IFLA_VXLAN_MAX,
2708 .policy = vxlan_policy,
2709 .priv_size = sizeof(struct vxlan_dev),
2710 .setup = vxlan_setup,
2711 .validate = vxlan_validate,
2712 .newlink = vxlan_newlink,
2713 .dellink = vxlan_dellink,
2714 .get_size = vxlan_get_size,
2715 .fill_info = vxlan_fill_info,
2716};
2717
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01002718static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
2719 struct net_device *dev)
2720{
2721 struct vxlan_dev *vxlan, *next;
2722 LIST_HEAD(list_kill);
2723
2724 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
2725 struct vxlan_rdst *dst = &vxlan->default_dst;
2726
2727 /* In case we created vxlan device with carrier
2728 * and we loose the carrier due to module unload
2729 * we also need to remove vxlan device. In other
2730 * cases, it's not necessary and remote_ifindex
2731 * is 0 here, so no matches.
2732 */
2733 if (dst->remote_ifindex == dev->ifindex)
2734 vxlan_dellink(vxlan->dev, &list_kill);
2735 }
2736
2737 unregister_netdevice_many(&list_kill);
2738}
2739
2740static int vxlan_lowerdev_event(struct notifier_block *unused,
2741 unsigned long event, void *ptr)
2742{
2743 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Daniel Borkmann783c1462014-01-22 21:07:53 +01002744 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01002745
Daniel Borkmann783c1462014-01-22 21:07:53 +01002746 if (event == NETDEV_UNREGISTER)
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01002747 vxlan_handle_lowerdev_unregister(vn, dev);
2748
2749 return NOTIFY_DONE;
2750}
2751
2752static struct notifier_block vxlan_notifier_block __read_mostly = {
2753 .notifier_call = vxlan_lowerdev_event,
2754};
2755
stephen hemmingerd3428942012-10-01 12:32:35 +00002756static __net_init int vxlan_init_net(struct net *net)
2757{
2758 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Cong Wang31fec5a2013-05-27 22:35:52 +00002759 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002760
stephen hemminger553675f2013-05-16 11:35:20 +00002761 INIT_LIST_HEAD(&vn->vxlan_list);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002762 spin_lock_init(&vn->sock_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00002763
stephen hemminger553675f2013-05-16 11:35:20 +00002764 for (h = 0; h < PORT_HASH_SIZE; ++h)
2765 INIT_HLIST_HEAD(&vn->sock_list[h]);
stephen hemmingerd3428942012-10-01 12:32:35 +00002766
2767 return 0;
2768}
2769
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002770static void __net_exit vxlan_exit_net(struct net *net)
2771{
2772 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2773 struct vxlan_dev *vxlan, *next;
2774 struct net_device *dev, *aux;
2775 LIST_HEAD(list);
2776
2777 rtnl_lock();
2778 for_each_netdev_safe(net, dev, aux)
2779 if (dev->rtnl_link_ops == &vxlan_link_ops)
2780 unregister_netdevice_queue(dev, &list);
2781
2782 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
2783 /* If vxlan->dev is in the same netns, it has already been added
2784 * to the list by the previous loop.
2785 */
2786 if (!net_eq(dev_net(vxlan->dev), net))
2787 unregister_netdevice_queue(dev, &list);
2788 }
2789
2790 unregister_netdevice_many(&list);
2791 rtnl_unlock();
2792}
2793
stephen hemmingerd3428942012-10-01 12:32:35 +00002794static struct pernet_operations vxlan_net_ops = {
2795 .init = vxlan_init_net,
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002796 .exit = vxlan_exit_net,
stephen hemmingerd3428942012-10-01 12:32:35 +00002797 .id = &vxlan_net_id,
2798 .size = sizeof(struct vxlan_net),
2799};
2800
2801static int __init vxlan_init_module(void)
2802{
2803 int rc;
2804
Stephen Hemminger758c57d2013-06-17 14:16:09 -07002805 vxlan_wq = alloc_workqueue("vxlan", 0, 0);
2806 if (!vxlan_wq)
2807 return -ENOMEM;
2808
stephen hemmingerd3428942012-10-01 12:32:35 +00002809 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
2810
Daniel Borkmann783c1462014-01-22 21:07:53 +01002811 rc = register_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00002812 if (rc)
2813 goto out1;
2814
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01002815 rc = register_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00002816 if (rc)
2817 goto out2;
2818
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01002819 rc = rtnl_link_register(&vxlan_link_ops);
2820 if (rc)
2821 goto out3;
stephen hemmingerd3428942012-10-01 12:32:35 +00002822
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01002823 return 0;
2824out3:
2825 unregister_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00002826out2:
Daniel Borkmann783c1462014-01-22 21:07:53 +01002827 unregister_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00002828out1:
Stephen Hemminger758c57d2013-06-17 14:16:09 -07002829 destroy_workqueue(vxlan_wq);
stephen hemmingerd3428942012-10-01 12:32:35 +00002830 return rc;
2831}
Cong Wang7332a132013-05-27 22:35:53 +00002832late_initcall(vxlan_init_module);
stephen hemmingerd3428942012-10-01 12:32:35 +00002833
2834static void __exit vxlan_cleanup_module(void)
2835{
Stephen Hemmingerb7153982013-06-17 14:16:09 -07002836 rtnl_link_unregister(&vxlan_link_ops);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01002837 unregister_netdevice_notifier(&vxlan_notifier_block);
Stephen Hemminger758c57d2013-06-17 14:16:09 -07002838 destroy_workqueue(vxlan_wq);
Daniel Borkmann783c1462014-01-22 21:07:53 +01002839 unregister_pernet_subsys(&vxlan_net_ops);
2840 /* rcu_barrier() is called by netns */
stephen hemmingerd3428942012-10-01 12:32:35 +00002841}
2842module_exit(vxlan_cleanup_module);
2843
2844MODULE_LICENSE("GPL");
2845MODULE_VERSION(VXLAN_VERSION);
stephen hemminger3b8df3c2013-04-27 11:31:52 +00002846MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
Jesse Brandeburgead51392014-01-17 11:00:33 -08002847MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
stephen hemmingerd3428942012-10-01 12:32:35 +00002848MODULE_ALIAS_RTNL_LINK("vxlan");