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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>
stephen hemmingerd3428942012-10-01 12:32:35 +000014#include <linux/module.h>
15#include <linux/errno.h>
16#include <linux/slab.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000017#include <linux/udp.h>
18#include <linux/igmp.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000019#include <linux/if_ether.h>
Yan Burman1b13c972013-01-29 23:43:07 +000020#include <linux/ethtool.h>
David Stevense4f67ad2012-11-20 02:50:14 +000021#include <net/arp.h>
22#include <net/ndisc.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000023#include <net/ip.h>
24#include <net/icmp.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000025#include <net/rtnetlink.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000026#include <net/inet_ecn.h>
27#include <net/net_namespace.h>
28#include <net/netns/generic.h>
Pravin B Shelar012a5722013-08-19 11:23:07 -070029#include <net/vxlan.h>
stephen hemminger40d29af2016-02-09 22:07:29 -080030
Cong Wange4c7ed42013-08-31 13:44:33 +080031#if IS_ENABLED(CONFIG_IPV6)
Cong Wange4c7ed42013-08-31 13:44:33 +080032#include <net/ip6_tunnel.h>
Cong Wang660d98c2013-09-02 10:06:52 +080033#include <net/ip6_checksum.h>
Cong Wange4c7ed42013-08-31 13:44:33 +080034#endif
stephen hemmingerd3428942012-10-01 12:32:35 +000035
36#define VXLAN_VERSION "0.1"
37
stephen hemminger553675f2013-05-16 11:35:20 +000038#define PORT_HASH_BITS 8
39#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
stephen hemmingerd3428942012-10-01 12:32:35 +000040#define FDB_AGE_DEFAULT 300 /* 5 min */
41#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
42
stephen hemminger23c578b2013-04-27 11:31:53 +000043/* UDP port for VXLAN traffic.
44 * The IANA assigned port is 4789, but the Linux default is 8472
Stephen Hemminger234f5b72013-06-17 14:16:41 -070045 * for compatibility with early adopters.
stephen hemminger23c578b2013-04-27 11:31:53 +000046 */
Stephen Hemminger9daaa392013-06-17 14:16:12 -070047static unsigned short vxlan_port __read_mostly = 8472;
48module_param_named(udp_port, vxlan_port, ushort, 0444);
stephen hemmingerd3428942012-10-01 12:32:35 +000049MODULE_PARM_DESC(udp_port, "Destination UDP port");
50
51static bool log_ecn_error = true;
52module_param(log_ecn_error, bool, 0644);
53MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
54
Pravin B Shelar60d9d4c2013-06-20 00:26:31 -070055static int vxlan_net_id;
Thomas Graf0dfbdf42015-07-21 10:44:02 +020056static struct rtnl_link_ops vxlan_link_ops;
stephen hemminger553675f2013-05-16 11:35:20 +000057
Li RongQing7256eac2016-01-29 09:43:47 +080058static const u8 all_zeros_mac[ETH_ALEN + 2];
Mike Rapoportafbd8ba2013-06-25 16:01:51 +030059
Jiri Benc205f3562015-09-24 13:50:01 +020060static int vxlan_sock_add(struct vxlan_dev *vxlan);
Thomas Graf614732e2015-07-21 10:44:06 +020061
stephen hemminger553675f2013-05-16 11:35:20 +000062/* per-network namespace private data for this module */
63struct vxlan_net {
64 struct list_head vxlan_list;
65 struct hlist_head sock_list[PORT_HASH_SIZE];
Stephen Hemminger1c51a912013-06-17 14:16:11 -070066 spinlock_t sock_lock;
stephen hemminger553675f2013-05-16 11:35:20 +000067};
68
stephen hemmingerd3428942012-10-01 12:32:35 +000069/* Forwarding table entry */
70struct vxlan_fdb {
71 struct hlist_node hlist; /* linked list of entries */
72 struct rcu_head rcu;
73 unsigned long updated; /* jiffies */
74 unsigned long used;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -070075 struct list_head remotes;
Sowmini Varadhan7177a3b2015-07-20 09:54:50 +020076 u8 eth_addr[ETH_ALEN];
stephen hemmingerd3428942012-10-01 12:32:35 +000077 u16 state; /* see ndm_state */
David Stevensae884082013-04-19 00:36:26 +000078 u8 flags; /* see ndm_flags */
stephen hemmingerd3428942012-10-01 12:32:35 +000079};
80
stephen hemmingerd3428942012-10-01 12:32:35 +000081/* salt for hash table */
82static u32 vxlan_salt __read_mostly;
83
Thomas Grafee122c72015-07-21 10:43:58 +020084static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
85{
Thomas Grafe7030872015-07-21 10:44:01 +020086 return vs->flags & VXLAN_F_COLLECT_METADATA ||
87 ip_tunnel_collect_metadata();
Thomas Grafee122c72015-07-21 10:43:58 +020088}
89
Cong Wange4c7ed42013-08-31 13:44:33 +080090#if IS_ENABLED(CONFIG_IPV6)
91static inline
92bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
93{
Jiri Bencf0ef3122015-03-29 16:17:37 +020094 if (a->sa.sa_family != b->sa.sa_family)
95 return false;
96 if (a->sa.sa_family == AF_INET6)
97 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
98 else
99 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
Cong Wange4c7ed42013-08-31 13:44:33 +0800100}
101
102static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
103{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200104 if (ipa->sa.sa_family == AF_INET6)
105 return ipv6_addr_any(&ipa->sin6.sin6_addr);
106 else
107 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
Cong Wange4c7ed42013-08-31 13:44:33 +0800108}
109
110static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
111{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200112 if (ipa->sa.sa_family == AF_INET6)
113 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
114 else
115 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
Cong Wange4c7ed42013-08-31 13:44:33 +0800116}
117
118static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
119{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200120 if (nla_len(nla) >= sizeof(struct in6_addr)) {
Jiri Benc67b61f62015-03-29 16:59:26 +0200121 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200122 ip->sa.sa_family = AF_INET6;
123 return 0;
124 } else if (nla_len(nla) >= sizeof(__be32)) {
Jiri Benc67b61f62015-03-29 16:59:26 +0200125 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200126 ip->sa.sa_family = AF_INET;
127 return 0;
128 } else {
129 return -EAFNOSUPPORT;
130 }
Cong Wange4c7ed42013-08-31 13:44:33 +0800131}
132
133static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
Jiri Bencf0ef3122015-03-29 16:17:37 +0200134 const union vxlan_addr *ip)
Cong Wange4c7ed42013-08-31 13:44:33 +0800135{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200136 if (ip->sa.sa_family == AF_INET6)
Jiri Benc930345e2015-03-29 16:59:25 +0200137 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200138 else
Jiri Benc930345e2015-03-29 16:59:25 +0200139 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
Cong Wange4c7ed42013-08-31 13:44:33 +0800140}
141
142#else /* !CONFIG_IPV6 */
143
144static inline
145bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
146{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200147 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
Cong Wange4c7ed42013-08-31 13:44:33 +0800148}
149
150static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
151{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200152 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
Cong Wange4c7ed42013-08-31 13:44:33 +0800153}
154
155static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
156{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200157 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
Cong Wange4c7ed42013-08-31 13:44:33 +0800158}
159
160static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
161{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200162 if (nla_len(nla) >= sizeof(struct in6_addr)) {
163 return -EAFNOSUPPORT;
164 } else if (nla_len(nla) >= sizeof(__be32)) {
Jiri Benc67b61f62015-03-29 16:59:26 +0200165 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200166 ip->sa.sa_family = AF_INET;
167 return 0;
168 } else {
169 return -EAFNOSUPPORT;
170 }
Cong Wange4c7ed42013-08-31 13:44:33 +0800171}
172
173static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
Jiri Bencf0ef3122015-03-29 16:17:37 +0200174 const union vxlan_addr *ip)
Cong Wange4c7ed42013-08-31 13:44:33 +0800175{
Jiri Benc930345e2015-03-29 16:59:25 +0200176 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
Cong Wange4c7ed42013-08-31 13:44:33 +0800177}
178#endif
179
stephen hemminger553675f2013-05-16 11:35:20 +0000180/* Virtual Network hash table head */
Jiri Benc54bfd872016-02-16 21:58:58 +0100181static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni)
stephen hemminger553675f2013-05-16 11:35:20 +0000182{
Jiri Benc54bfd872016-02-16 21:58:58 +0100183 return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)];
stephen hemminger553675f2013-05-16 11:35:20 +0000184}
185
186/* Socket hash table head */
187static inline struct hlist_head *vs_head(struct net *net, __be16 port)
stephen hemmingerd3428942012-10-01 12:32:35 +0000188{
189 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
190
stephen hemminger553675f2013-05-16 11:35:20 +0000191 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
192}
193
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700194/* First remote destination for a forwarding entry.
195 * Guaranteed to be non-NULL because remotes are never deleted.
196 */
stephen hemminger5ca54612013-08-04 17:17:39 -0700197static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700198{
stephen hemminger5ca54612013-08-04 17:17:39 -0700199 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
200}
201
202static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
203{
204 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700205}
206
Thomas Grafac5132d2015-01-15 03:53:56 +0100207/* Find VXLAN socket based on network namespace, address family and UDP port
208 * and enabled unshareable flags.
209 */
210static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
211 __be16 port, u32 flags)
stephen hemminger553675f2013-05-16 11:35:20 +0000212{
213 struct vxlan_sock *vs;
Tom Herbertaf33c1a2015-01-20 11:23:05 -0800214
215 flags &= VXLAN_F_RCV_FLAGS;
stephen hemminger553675f2013-05-16 11:35:20 +0000216
217 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -0200218 if (inet_sk(vs->sock->sk)->inet_sport == port &&
Jiri Benc705cc622015-08-20 13:56:28 +0200219 vxlan_get_sk_family(vs) == family &&
Tom Herbertaf33c1a2015-01-20 11:23:05 -0800220 vs->flags == flags)
stephen hemminger553675f2013-05-16 11:35:20 +0000221 return vs;
222 }
223 return NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +0000224}
225
Jiri Benc54bfd872016-02-16 21:58:58 +0100226static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, __be32 vni)
stephen hemmingerd3428942012-10-01 12:32:35 +0000227{
228 struct vxlan_dev *vxlan;
stephen hemmingerd3428942012-10-01 12:32:35 +0000229
Jiri Bencb9167b22016-02-16 21:59:03 +0100230 /* For flow based devices, map all packets to VNI 0 */
231 if (vs->flags & VXLAN_F_COLLECT_METADATA)
232 vni = 0;
233
Jiri Benc54bfd872016-02-16 21:58:58 +0100234 hlist_for_each_entry_rcu(vxlan, vni_head(vs, vni), hlist) {
235 if (vxlan->default_dst.remote_vni == vni)
stephen hemmingerd3428942012-10-01 12:32:35 +0000236 return vxlan;
237 }
238
239 return NULL;
240}
241
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700242/* Look up VNI in a per net namespace table */
Jiri Benc54bfd872016-02-16 21:58:58 +0100243static struct vxlan_dev *vxlan_find_vni(struct net *net, __be32 vni,
Thomas Grafac5132d2015-01-15 03:53:56 +0100244 sa_family_t family, __be16 port,
245 u32 flags)
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700246{
247 struct vxlan_sock *vs;
248
Thomas Grafac5132d2015-01-15 03:53:56 +0100249 vs = vxlan_find_sock(net, family, port, flags);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700250 if (!vs)
251 return NULL;
252
Jiri Benc54bfd872016-02-16 21:58:58 +0100253 return vxlan_vs_find_vni(vs, vni);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700254}
255
stephen hemmingerd3428942012-10-01 12:32:35 +0000256/* Fill in neighbour message in skbuff. */
257static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
Stephen Hemminger234f5b72013-06-17 14:16:41 -0700258 const struct vxlan_fdb *fdb,
259 u32 portid, u32 seq, int type, unsigned int flags,
260 const struct vxlan_rdst *rdst)
stephen hemmingerd3428942012-10-01 12:32:35 +0000261{
262 unsigned long now = jiffies;
263 struct nda_cacheinfo ci;
264 struct nlmsghdr *nlh;
265 struct ndmsg *ndm;
David Stevense4f67ad2012-11-20 02:50:14 +0000266 bool send_ip, send_eth;
stephen hemmingerd3428942012-10-01 12:32:35 +0000267
268 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
269 if (nlh == NULL)
270 return -EMSGSIZE;
271
272 ndm = nlmsg_data(nlh);
273 memset(ndm, 0, sizeof(*ndm));
David Stevense4f67ad2012-11-20 02:50:14 +0000274
275 send_eth = send_ip = true;
276
277 if (type == RTM_GETNEIGH) {
278 ndm->ndm_family = AF_INET;
Cong Wange4c7ed42013-08-31 13:44:33 +0800279 send_ip = !vxlan_addr_any(&rdst->remote_ip);
David Stevense4f67ad2012-11-20 02:50:14 +0000280 send_eth = !is_zero_ether_addr(fdb->eth_addr);
281 } else
282 ndm->ndm_family = AF_BRIDGE;
stephen hemmingerd3428942012-10-01 12:32:35 +0000283 ndm->ndm_state = fdb->state;
284 ndm->ndm_ifindex = vxlan->dev->ifindex;
David Stevensae884082013-04-19 00:36:26 +0000285 ndm->ndm_flags = fdb->flags;
Jun Zhao545469f2014-07-26 00:38:59 +0800286 ndm->ndm_type = RTN_UNICAST;
stephen hemmingerd3428942012-10-01 12:32:35 +0000287
Nicolas Dichtel193523b2015-01-20 15:15:47 +0100288 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
Nicolas Dichtel49670822015-01-26 14:10:53 +0100289 nla_put_s32(skb, NDA_LINK_NETNSID,
WANG Cong38f507f2016-09-01 21:53:44 -0700290 peernet2id(dev_net(vxlan->dev), vxlan->net)))
Nicolas Dichtel193523b2015-01-20 15:15:47 +0100291 goto nla_put_failure;
292
David Stevense4f67ad2012-11-20 02:50:14 +0000293 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
stephen hemmingerd3428942012-10-01 12:32:35 +0000294 goto nla_put_failure;
295
Cong Wange4c7ed42013-08-31 13:44:33 +0800296 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
David Stevens66817122013-03-15 04:35:51 +0000297 goto nla_put_failure;
298
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200299 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
David Stevens66817122013-03-15 04:35:51 +0000300 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
301 goto nla_put_failure;
Atzm Watanabec7995c42013-04-16 02:50:52 +0000302 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
Jiri Benc54bfd872016-02-16 21:58:58 +0100303 nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni)))
David Stevens66817122013-03-15 04:35:51 +0000304 goto nla_put_failure;
305 if (rdst->remote_ifindex &&
306 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
stephen hemmingerd3428942012-10-01 12:32:35 +0000307 goto nla_put_failure;
308
309 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
310 ci.ndm_confirmed = 0;
311 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
312 ci.ndm_refcnt = 0;
313
314 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
315 goto nla_put_failure;
316
Johannes Berg053c0952015-01-16 22:09:00 +0100317 nlmsg_end(skb, nlh);
318 return 0;
stephen hemmingerd3428942012-10-01 12:32:35 +0000319
320nla_put_failure:
321 nlmsg_cancel(skb, nlh);
322 return -EMSGSIZE;
323}
324
325static inline size_t vxlan_nlmsg_size(void)
326{
327 return NLMSG_ALIGN(sizeof(struct ndmsg))
328 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
Cong Wange4c7ed42013-08-31 13:44:33 +0800329 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
stephen hemminger73cf3312013-04-27 11:31:54 +0000330 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
David Stevens66817122013-03-15 04:35:51 +0000331 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
332 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
Nicolas Dichtel49670822015-01-26 14:10:53 +0100333 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
stephen hemmingerd3428942012-10-01 12:32:35 +0000334 + nla_total_size(sizeof(struct nda_cacheinfo));
335}
336
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200337static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
338 struct vxlan_rdst *rd, int type)
stephen hemmingerd3428942012-10-01 12:32:35 +0000339{
340 struct net *net = dev_net(vxlan->dev);
341 struct sk_buff *skb;
342 int err = -ENOBUFS;
343
344 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
345 if (skb == NULL)
346 goto errout;
347
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200348 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
stephen hemmingerd3428942012-10-01 12:32:35 +0000349 if (err < 0) {
350 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
351 WARN_ON(err == -EMSGSIZE);
352 kfree_skb(skb);
353 goto errout;
354 }
355
356 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
357 return;
358errout:
359 if (err < 0)
360 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
361}
362
Cong Wange4c7ed42013-08-31 13:44:33 +0800363static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
David Stevense4f67ad2012-11-20 02:50:14 +0000364{
365 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700366 struct vxlan_fdb f = {
367 .state = NUD_STALE,
368 };
369 struct vxlan_rdst remote = {
Cong Wange4c7ed42013-08-31 13:44:33 +0800370 .remote_ip = *ipa, /* goes to NDA_DST */
Jiri Benc54bfd872016-02-16 21:58:58 +0100371 .remote_vni = cpu_to_be32(VXLAN_N_VID),
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700372 };
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700373
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200374 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
David Stevense4f67ad2012-11-20 02:50:14 +0000375}
376
377static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
378{
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700379 struct vxlan_fdb f = {
380 .state = NUD_STALE,
381 };
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200382 struct vxlan_rdst remote = { };
David Stevense4f67ad2012-11-20 02:50:14 +0000383
David Stevense4f67ad2012-11-20 02:50:14 +0000384 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
385
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200386 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
David Stevense4f67ad2012-11-20 02:50:14 +0000387}
388
stephen hemmingerd3428942012-10-01 12:32:35 +0000389/* Hash Ethernet address */
390static u32 eth_hash(const unsigned char *addr)
391{
392 u64 value = get_unaligned((u64 *)addr);
393
394 /* only want 6 bytes */
395#ifdef __BIG_ENDIAN
stephen hemmingerd3428942012-10-01 12:32:35 +0000396 value >>= 16;
stephen hemminger321fb992012-10-09 20:35:47 +0000397#else
398 value <<= 16;
stephen hemmingerd3428942012-10-01 12:32:35 +0000399#endif
400 return hash_64(value, FDB_HASH_BITS);
401}
402
403/* Hash chain to use given mac address */
404static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
405 const u8 *mac)
406{
407 return &vxlan->fdb_head[eth_hash(mac)];
408}
409
410/* Look up Ethernet address in forwarding table */
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000411static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
stephen hemmingerd3428942012-10-01 12:32:35 +0000412 const u8 *mac)
stephen hemmingerd3428942012-10-01 12:32:35 +0000413{
414 struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
415 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000416
Sasha Levinb67bfe02013-02-27 17:06:00 -0800417 hlist_for_each_entry_rcu(f, head, hlist) {
Joe Perches7367d0b2013-09-01 11:51:23 -0700418 if (ether_addr_equal(mac, f->eth_addr))
stephen hemmingerd3428942012-10-01 12:32:35 +0000419 return f;
420 }
421
422 return NULL;
423}
424
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000425static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
426 const u8 *mac)
427{
428 struct vxlan_fdb *f;
429
430 f = __vxlan_find_mac(vxlan, mac);
431 if (f)
432 f->used = jiffies;
433
434 return f;
435}
436
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300437/* caller should hold vxlan->hash_lock */
438static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
Cong Wange4c7ed42013-08-31 13:44:33 +0800439 union vxlan_addr *ip, __be16 port,
Jiri Benc54bfd872016-02-16 21:58:58 +0100440 __be32 vni, __u32 ifindex)
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300441{
442 struct vxlan_rdst *rd;
443
444 list_for_each_entry(rd, &f->remotes, list) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800445 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300446 rd->remote_port == port &&
447 rd->remote_vni == vni &&
448 rd->remote_ifindex == ifindex)
449 return rd;
450 }
451
452 return NULL;
453}
454
Thomas Richter906dc182013-07-19 17:20:07 +0200455/* Replace destination of unicast mac */
456static int vxlan_fdb_replace(struct vxlan_fdb *f,
Jiri Benc54bfd872016-02-16 21:58:58 +0100457 union vxlan_addr *ip, __be16 port, __be32 vni,
458 __u32 ifindex)
Thomas Richter906dc182013-07-19 17:20:07 +0200459{
460 struct vxlan_rdst *rd;
461
462 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
463 if (rd)
464 return 0;
465
466 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
467 if (!rd)
468 return 0;
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100469
470 dst_cache_reset(&rd->dst_cache);
Cong Wange4c7ed42013-08-31 13:44:33 +0800471 rd->remote_ip = *ip;
Thomas Richter906dc182013-07-19 17:20:07 +0200472 rd->remote_port = port;
473 rd->remote_vni = vni;
474 rd->remote_ifindex = ifindex;
475 return 1;
476}
477
David Stevens66817122013-03-15 04:35:51 +0000478/* Add/update destinations for multicast */
479static int vxlan_fdb_append(struct vxlan_fdb *f,
Jiri Benc54bfd872016-02-16 21:58:58 +0100480 union vxlan_addr *ip, __be16 port, __be32 vni,
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200481 __u32 ifindex, struct vxlan_rdst **rdp)
David Stevens66817122013-03-15 04:35:51 +0000482{
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700483 struct vxlan_rdst *rd;
David Stevens66817122013-03-15 04:35:51 +0000484
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300485 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
486 if (rd)
487 return 0;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700488
David Stevens66817122013-03-15 04:35:51 +0000489 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
490 if (rd == NULL)
491 return -ENOBUFS;
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100492
493 if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) {
494 kfree(rd);
495 return -ENOBUFS;
496 }
497
Cong Wange4c7ed42013-08-31 13:44:33 +0800498 rd->remote_ip = *ip;
David Stevens66817122013-03-15 04:35:51 +0000499 rd->remote_port = port;
500 rd->remote_vni = vni;
501 rd->remote_ifindex = ifindex;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700502
503 list_add_tail_rcu(&rd->list, &f->remotes);
504
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200505 *rdp = rd;
David Stevens66817122013-03-15 04:35:51 +0000506 return 1;
507}
508
Tom Herbertdfd86452015-01-12 17:00:38 -0800509static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
510 unsigned int off,
511 struct vxlanhdr *vh, size_t hdrlen,
Jiri Benc54bfd872016-02-16 21:58:58 +0100512 __be32 vni_field,
513 struct gro_remcsum *grc,
Tom Herbert0ace2ca2015-02-10 16:30:32 -0800514 bool nopartial)
Tom Herbertdfd86452015-01-12 17:00:38 -0800515{
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700516 size_t start, offset;
Tom Herbertdfd86452015-01-12 17:00:38 -0800517
518 if (skb->remcsum_offload)
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700519 return vh;
Tom Herbertdfd86452015-01-12 17:00:38 -0800520
521 if (!NAPI_GRO_CB(skb)->csum_valid)
522 return NULL;
523
Jiri Benc54bfd872016-02-16 21:58:58 +0100524 start = vxlan_rco_start(vni_field);
525 offset = start + vxlan_rco_offset(vni_field);
Tom Herbertdfd86452015-01-12 17:00:38 -0800526
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700527 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
528 start, offset, grc, nopartial);
Tom Herbertdfd86452015-01-12 17:00:38 -0800529
530 skb->remcsum_offload = 1;
531
532 return vh;
533}
534
Tom Herbert5602c482016-04-05 08:22:53 -0700535static struct sk_buff **vxlan_gro_receive(struct sock *sk,
536 struct sk_buff **head,
537 struct sk_buff *skb)
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200538{
539 struct sk_buff *p, **pp = NULL;
540 struct vxlanhdr *vh, *vh2;
Jesse Gross9b174d82014-12-30 19:10:15 -0800541 unsigned int hlen, off_vx;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200542 int flush = 1;
Tom Herbert5602c482016-04-05 08:22:53 -0700543 struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk);
Jiri Benc54bfd872016-02-16 21:58:58 +0100544 __be32 flags;
Tom Herbert26c4f7d2015-02-10 16:30:27 -0800545 struct gro_remcsum grc;
546
547 skb_gro_remcsum_init(&grc);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200548
549 off_vx = skb_gro_offset(skb);
550 hlen = off_vx + sizeof(*vh);
551 vh = skb_gro_header_fast(skb, off_vx);
552 if (skb_gro_header_hard(skb, hlen)) {
553 vh = skb_gro_header_slow(skb, hlen, off_vx);
554 if (unlikely(!vh))
555 goto out;
556 }
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200557
Tom Herbertdfd86452015-01-12 17:00:38 -0800558 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
559
Jiri Benc54bfd872016-02-16 21:58:58 +0100560 flags = vh->vx_flags;
Tom Herbertdfd86452015-01-12 17:00:38 -0800561
562 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
563 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
Jiri Benc54bfd872016-02-16 21:58:58 +0100564 vh->vx_vni, &grc,
Tom Herbert0ace2ca2015-02-10 16:30:32 -0800565 !!(vs->flags &
566 VXLAN_F_REMCSUM_NOPARTIAL));
Tom Herbertdfd86452015-01-12 17:00:38 -0800567
568 if (!vh)
569 goto out;
570 }
571
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700572 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
573
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200574 for (p = *head; p; p = p->next) {
575 if (!NAPI_GRO_CB(p)->same_flow)
576 continue;
577
578 vh2 = (struct vxlanhdr *)(p->data + off_vx);
Thomas Graf35114942015-01-15 03:53:55 +0100579 if (vh->vx_flags != vh2->vx_flags ||
580 vh->vx_vni != vh2->vx_vni) {
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200581 NAPI_GRO_CB(p)->same_flow = 0;
582 continue;
583 }
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200584 }
585
Jesse Gross9b174d82014-12-30 19:10:15 -0800586 pp = eth_gro_receive(head, skb);
Alexander Duyckc194cf92016-03-09 09:24:23 -0800587 flush = 0;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200588
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200589out:
Tom Herbert26c4f7d2015-02-10 16:30:27 -0800590 skb_gro_remcsum_cleanup(skb, &grc);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200591 NAPI_GRO_CB(skb)->flush |= flush;
592
593 return pp;
594}
595
Tom Herbert5602c482016-04-05 08:22:53 -0700596static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff)
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200597{
Jarno Rajahalme229740c2016-05-03 16:10:21 -0700598 /* Sets 'skb->inner_mac_header' since we are always called with
599 * 'skb->encapsulation' set.
600 */
Jesse Gross9b174d82014-12-30 19:10:15 -0800601 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200602}
603
stephen hemmingerd3428942012-10-01 12:32:35 +0000604/* Add new entry to forwarding table -- assumes lock held */
605static int vxlan_fdb_create(struct vxlan_dev *vxlan,
Cong Wange4c7ed42013-08-31 13:44:33 +0800606 const u8 *mac, union vxlan_addr *ip,
David Stevens66817122013-03-15 04:35:51 +0000607 __u16 state, __u16 flags,
Jiri Benc54bfd872016-02-16 21:58:58 +0100608 __be16 port, __be32 vni, __u32 ifindex,
David Stevensae884082013-04-19 00:36:26 +0000609 __u8 ndm_flags)
stephen hemmingerd3428942012-10-01 12:32:35 +0000610{
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200611 struct vxlan_rdst *rd = NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +0000612 struct vxlan_fdb *f;
613 int notify = 0;
614
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000615 f = __vxlan_find_mac(vxlan, mac);
stephen hemmingerd3428942012-10-01 12:32:35 +0000616 if (f) {
617 if (flags & NLM_F_EXCL) {
618 netdev_dbg(vxlan->dev,
619 "lost race to create %pM\n", mac);
620 return -EEXIST;
621 }
622 if (f->state != state) {
623 f->state = state;
624 f->updated = jiffies;
625 notify = 1;
626 }
David Stevensae884082013-04-19 00:36:26 +0000627 if (f->flags != ndm_flags) {
628 f->flags = ndm_flags;
629 f->updated = jiffies;
630 notify = 1;
631 }
Thomas Richter906dc182013-07-19 17:20:07 +0200632 if ((flags & NLM_F_REPLACE)) {
633 /* Only change unicasts */
634 if (!(is_multicast_ether_addr(f->eth_addr) ||
635 is_zero_ether_addr(f->eth_addr))) {
Li RongQing60840422015-04-22 15:49:10 +0800636 notify |= vxlan_fdb_replace(f, ip, port, vni,
Thomas Richter906dc182013-07-19 17:20:07 +0200637 ifindex);
Thomas Richter906dc182013-07-19 17:20:07 +0200638 } else
639 return -EOPNOTSUPP;
640 }
David Stevens66817122013-03-15 04:35:51 +0000641 if ((flags & NLM_F_APPEND) &&
Mike Rapoport58e4c762013-06-25 16:01:56 +0300642 (is_multicast_ether_addr(f->eth_addr) ||
643 is_zero_ether_addr(f->eth_addr))) {
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200644 int rc = vxlan_fdb_append(f, ip, port, vni, ifindex,
645 &rd);
David Stevens66817122013-03-15 04:35:51 +0000646
647 if (rc < 0)
648 return rc;
649 notify |= rc;
650 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000651 } else {
652 if (!(flags & NLM_F_CREATE))
653 return -ENOENT;
654
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200655 if (vxlan->cfg.addrmax &&
656 vxlan->addrcnt >= vxlan->cfg.addrmax)
stephen hemmingerd3428942012-10-01 12:32:35 +0000657 return -ENOSPC;
658
Thomas Richter906dc182013-07-19 17:20:07 +0200659 /* Disallow replace to add a multicast entry */
660 if ((flags & NLM_F_REPLACE) &&
661 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
662 return -EOPNOTSUPP;
663
Cong Wange4c7ed42013-08-31 13:44:33 +0800664 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
stephen hemmingerd3428942012-10-01 12:32:35 +0000665 f = kmalloc(sizeof(*f), GFP_ATOMIC);
666 if (!f)
667 return -ENOMEM;
668
669 notify = 1;
stephen hemmingerd3428942012-10-01 12:32:35 +0000670 f->state = state;
David Stevensae884082013-04-19 00:36:26 +0000671 f->flags = ndm_flags;
stephen hemmingerd3428942012-10-01 12:32:35 +0000672 f->updated = f->used = jiffies;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700673 INIT_LIST_HEAD(&f->remotes);
stephen hemmingerd3428942012-10-01 12:32:35 +0000674 memcpy(f->eth_addr, mac, ETH_ALEN);
675
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200676 vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700677
stephen hemmingerd3428942012-10-01 12:32:35 +0000678 ++vxlan->addrcnt;
679 hlist_add_head_rcu(&f->hlist,
680 vxlan_fdb_head(vxlan, mac));
681 }
682
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200683 if (notify) {
684 if (rd == NULL)
685 rd = first_remote_rtnl(f);
686 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
687 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000688
689 return 0;
690}
691
Wei Yongjun6706c822013-04-11 19:00:35 +0000692static void vxlan_fdb_free(struct rcu_head *head)
David Stevens66817122013-03-15 04:35:51 +0000693{
694 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700695 struct vxlan_rdst *rd, *nd;
David Stevens66817122013-03-15 04:35:51 +0000696
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100697 list_for_each_entry_safe(rd, nd, &f->remotes, list) {
698 dst_cache_destroy(&rd->dst_cache);
David Stevens66817122013-03-15 04:35:51 +0000699 kfree(rd);
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100700 }
David Stevens66817122013-03-15 04:35:51 +0000701 kfree(f);
702}
703
stephen hemmingerd3428942012-10-01 12:32:35 +0000704static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
705{
706 netdev_dbg(vxlan->dev,
707 "delete %pM\n", f->eth_addr);
708
709 --vxlan->addrcnt;
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200710 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
stephen hemmingerd3428942012-10-01 12:32:35 +0000711
712 hlist_del_rcu(&f->hlist);
David Stevens66817122013-03-15 04:35:51 +0000713 call_rcu(&f->rcu, vxlan_fdb_free);
stephen hemmingerd3428942012-10-01 12:32:35 +0000714}
715
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300716static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
Jiri Benc54bfd872016-02-16 21:58:58 +0100717 union vxlan_addr *ip, __be16 *port, __be32 *vni,
718 u32 *ifindex)
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300719{
720 struct net *net = dev_net(vxlan->dev);
Cong Wange4c7ed42013-08-31 13:44:33 +0800721 int err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300722
723 if (tb[NDA_DST]) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800724 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
725 if (err)
726 return err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300727 } else {
Cong Wange4c7ed42013-08-31 13:44:33 +0800728 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
729 if (remote->sa.sa_family == AF_INET) {
730 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
731 ip->sa.sa_family = AF_INET;
732#if IS_ENABLED(CONFIG_IPV6)
733 } else {
734 ip->sin6.sin6_addr = in6addr_any;
735 ip->sa.sa_family = AF_INET6;
736#endif
737 }
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300738 }
739
740 if (tb[NDA_PORT]) {
741 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
742 return -EINVAL;
743 *port = nla_get_be16(tb[NDA_PORT]);
744 } else {
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200745 *port = vxlan->cfg.dst_port;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300746 }
747
748 if (tb[NDA_VNI]) {
749 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
750 return -EINVAL;
Jiri Benc54bfd872016-02-16 21:58:58 +0100751 *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300752 } else {
753 *vni = vxlan->default_dst.remote_vni;
754 }
755
756 if (tb[NDA_IFINDEX]) {
757 struct net_device *tdev;
758
759 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
760 return -EINVAL;
761 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
Ying Xue73763942014-01-15 10:23:41 +0800762 tdev = __dev_get_by_index(net, *ifindex);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300763 if (!tdev)
764 return -EADDRNOTAVAIL;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300765 } else {
766 *ifindex = 0;
767 }
768
769 return 0;
770}
771
stephen hemmingerd3428942012-10-01 12:32:35 +0000772/* Add static entry (via netlink) */
773static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
774 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100775 const unsigned char *addr, u16 vid, u16 flags)
stephen hemmingerd3428942012-10-01 12:32:35 +0000776{
777 struct vxlan_dev *vxlan = netdev_priv(dev);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300778 /* struct net *net = dev_net(vxlan->dev); */
Cong Wange4c7ed42013-08-31 13:44:33 +0800779 union vxlan_addr ip;
stephen hemminger73cf3312013-04-27 11:31:54 +0000780 __be16 port;
Jiri Benc54bfd872016-02-16 21:58:58 +0100781 __be32 vni;
782 u32 ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +0000783 int err;
784
785 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
786 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
787 ndm->ndm_state);
788 return -EINVAL;
789 }
790
791 if (tb[NDA_DST] == NULL)
792 return -EINVAL;
793
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300794 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
795 if (err)
796 return err;
David Stevens66817122013-03-15 04:35:51 +0000797
Mike Rapoport5933a7b2014-04-01 09:23:01 +0300798 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
799 return -EAFNOSUPPORT;
800
stephen hemmingerd3428942012-10-01 12:32:35 +0000801 spin_lock_bh(&vxlan->hash_lock);
Cong Wange4c7ed42013-08-31 13:44:33 +0800802 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
stephen hemminger73cf3312013-04-27 11:31:54 +0000803 port, vni, ifindex, ndm->ndm_flags);
stephen hemmingerd3428942012-10-01 12:32:35 +0000804 spin_unlock_bh(&vxlan->hash_lock);
805
806 return err;
807}
808
809/* Delete entry (via netlink) */
Vlad Yasevich1690be62013-02-13 12:00:18 +0000810static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
811 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100812 const unsigned char *addr, u16 vid)
stephen hemmingerd3428942012-10-01 12:32:35 +0000813{
814 struct vxlan_dev *vxlan = netdev_priv(dev);
815 struct vxlan_fdb *f;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300816 struct vxlan_rdst *rd = NULL;
Cong Wange4c7ed42013-08-31 13:44:33 +0800817 union vxlan_addr ip;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300818 __be16 port;
Jiri Benc54bfd872016-02-16 21:58:58 +0100819 __be32 vni;
820 u32 ifindex;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300821 int err;
822
823 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
824 if (err)
825 return err;
826
827 err = -ENOENT;
stephen hemmingerd3428942012-10-01 12:32:35 +0000828
829 spin_lock_bh(&vxlan->hash_lock);
830 f = vxlan_find_mac(vxlan, addr);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300831 if (!f)
832 goto out;
833
Cong Wange4c7ed42013-08-31 13:44:33 +0800834 if (!vxlan_addr_any(&ip)) {
835 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300836 if (!rd)
837 goto out;
stephen hemmingerd3428942012-10-01 12:32:35 +0000838 }
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300839
840 err = 0;
841
842 /* remove a destination if it's not the only one on the list,
843 * otherwise destroy the fdb entry
844 */
845 if (rd && !list_is_singular(&f->remotes)) {
846 list_del_rcu(&rd->list);
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200847 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
Wei Yongjundcdc7a52013-08-17 07:32:09 +0800848 kfree_rcu(rd, rcu);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300849 goto out;
850 }
851
852 vxlan_fdb_destroy(vxlan, f);
853
854out:
stephen hemmingerd3428942012-10-01 12:32:35 +0000855 spin_unlock_bh(&vxlan->hash_lock);
856
857 return err;
858}
859
860/* Dump forwarding table */
861static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
Jamal Hadi Salim5d5eacb2014-07-10 07:01:58 -0400862 struct net_device *dev,
Roopa Prabhud2976532016-08-30 21:56:45 -0700863 struct net_device *filter_dev, int *idx)
stephen hemmingerd3428942012-10-01 12:32:35 +0000864{
865 struct vxlan_dev *vxlan = netdev_priv(dev);
866 unsigned int h;
Roopa Prabhud2976532016-08-30 21:56:45 -0700867 int err = 0;
stephen hemmingerd3428942012-10-01 12:32:35 +0000868
869 for (h = 0; h < FDB_HASH_SIZE; ++h) {
870 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000871
Sasha Levinb67bfe02013-02-27 17:06:00 -0800872 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
David Stevens66817122013-03-15 04:35:51 +0000873 struct vxlan_rdst *rd;
stephen hemmingerd3428942012-10-01 12:32:35 +0000874
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700875 list_for_each_entry_rcu(rd, &f->remotes, list) {
Roopa Prabhud2976532016-08-30 21:56:45 -0700876 if (*idx < cb->args[2])
Atzm Watanabe07a51cd2015-08-10 23:39:09 +0900877 goto skip;
878
David Stevens66817122013-03-15 04:35:51 +0000879 err = vxlan_fdb_info(skb, vxlan, f,
880 NETLINK_CB(cb->skb).portid,
881 cb->nlh->nlmsg_seq,
882 RTM_NEWNEIGH,
883 NLM_F_MULTI, rd);
Roopa Prabhud2976532016-08-30 21:56:45 -0700884 if (err < 0)
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700885 goto out;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700886skip:
Roopa Prabhud2976532016-08-30 21:56:45 -0700887 *idx += 1;
Atzm Watanabe07a51cd2015-08-10 23:39:09 +0900888 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000889 }
890 }
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700891out:
Roopa Prabhud2976532016-08-30 21:56:45 -0700892 return err;
stephen hemmingerd3428942012-10-01 12:32:35 +0000893}
894
895/* Watch incoming packets to learn mapping between Ethernet address
896 * and Tunnel endpoint.
Simon Hormanc4b49512015-04-02 11:17:58 +0900897 * Return true if packet is bogus and should be dropped.
stephen hemmingerd3428942012-10-01 12:32:35 +0000898 */
stephen hemminger26a41ae62013-06-17 12:09:58 -0700899static bool vxlan_snoop(struct net_device *dev,
Cong Wange4c7ed42013-08-31 13:44:33 +0800900 union vxlan_addr *src_ip, const u8 *src_mac)
stephen hemmingerd3428942012-10-01 12:32:35 +0000901{
902 struct vxlan_dev *vxlan = netdev_priv(dev);
903 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000904
905 f = vxlan_find_mac(vxlan, src_mac);
906 if (likely(f)) {
stephen hemminger5ca54612013-08-04 17:17:39 -0700907 struct vxlan_rdst *rdst = first_remote_rcu(f);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700908
Cong Wange4c7ed42013-08-31 13:44:33 +0800909 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip)))
stephen hemminger26a41ae62013-06-17 12:09:58 -0700910 return false;
911
912 /* Don't migrate static entries, drop packets */
stephen hemmingereb064c32013-06-18 14:27:01 -0700913 if (f->state & NUD_NOARP)
stephen hemminger26a41ae62013-06-17 12:09:58 -0700914 return true;
stephen hemmingerd3428942012-10-01 12:32:35 +0000915
916 if (net_ratelimit())
917 netdev_info(dev,
Cong Wange4c7ed42013-08-31 13:44:33 +0800918 "%pM migrated from %pIS to %pIS\n",
Rasmus Villemoesa4870f72015-02-07 03:17:31 +0100919 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
stephen hemmingerd3428942012-10-01 12:32:35 +0000920
Cong Wange4c7ed42013-08-31 13:44:33 +0800921 rdst->remote_ip = *src_ip;
stephen hemmingerd3428942012-10-01 12:32:35 +0000922 f->updated = jiffies;
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200923 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
stephen hemmingerd3428942012-10-01 12:32:35 +0000924 } else {
925 /* learned new entry */
926 spin_lock(&vxlan->hash_lock);
stephen hemminger3bf74b12013-06-17 12:09:57 -0700927
928 /* close off race between vxlan_flush and incoming packets */
929 if (netif_running(dev))
930 vxlan_fdb_create(vxlan, src_mac, src_ip,
931 NUD_REACHABLE,
932 NLM_F_EXCL|NLM_F_CREATE,
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200933 vxlan->cfg.dst_port,
stephen hemminger3bf74b12013-06-17 12:09:57 -0700934 vxlan->default_dst.remote_vni,
935 0, NTF_SELF);
stephen hemmingerd3428942012-10-01 12:32:35 +0000936 spin_unlock(&vxlan->hash_lock);
937 }
stephen hemminger26a41ae62013-06-17 12:09:58 -0700938
939 return false;
stephen hemmingerd3428942012-10-01 12:32:35 +0000940}
941
stephen hemmingerd3428942012-10-01 12:32:35 +0000942/* See if multicast group is already in use by other ID */
Gao feng95ab0992013-12-10 16:37:33 +0800943static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
stephen hemmingerd3428942012-10-01 12:32:35 +0000944{
stephen hemminger553675f2013-05-16 11:35:20 +0000945 struct vxlan_dev *vxlan;
Jiri Bencb1be00a2015-09-24 13:50:02 +0200946 unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
stephen hemmingerd3428942012-10-01 12:32:35 +0000947
Gao feng95ab0992013-12-10 16:37:33 +0800948 /* The vxlan_sock is only used by dev, leaving group has
949 * no effect on other vxlan devices.
950 */
Jiri Bencb1be00a2015-09-24 13:50:02 +0200951 if (family == AF_INET && dev->vn4_sock &&
952 atomic_read(&dev->vn4_sock->refcnt) == 1)
Gao feng95ab0992013-12-10 16:37:33 +0800953 return false;
Jiri Bencb1be00a2015-09-24 13:50:02 +0200954#if IS_ENABLED(CONFIG_IPV6)
955 if (family == AF_INET6 && dev->vn6_sock &&
956 atomic_read(&dev->vn6_sock->refcnt) == 1)
957 return false;
958#endif
Gao feng95ab0992013-12-10 16:37:33 +0800959
stephen hemminger553675f2013-05-16 11:35:20 +0000960 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
Gao feng95ab0992013-12-10 16:37:33 +0800961 if (!netif_running(vxlan->dev) || vxlan == dev)
stephen hemminger553675f2013-05-16 11:35:20 +0000962 continue;
stephen hemmingerd3428942012-10-01 12:32:35 +0000963
Jiri Bencb1be00a2015-09-24 13:50:02 +0200964 if (family == AF_INET && vxlan->vn4_sock != dev->vn4_sock)
Gao feng95ab0992013-12-10 16:37:33 +0800965 continue;
Jiri Bencb1be00a2015-09-24 13:50:02 +0200966#if IS_ENABLED(CONFIG_IPV6)
967 if (family == AF_INET6 && vxlan->vn6_sock != dev->vn6_sock)
968 continue;
969#endif
Gao feng95ab0992013-12-10 16:37:33 +0800970
971 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
972 &dev->default_dst.remote_ip))
973 continue;
974
975 if (vxlan->default_dst.remote_ifindex !=
976 dev->default_dst.remote_ifindex)
977 continue;
978
979 return true;
stephen hemminger553675f2013-05-16 11:35:20 +0000980 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000981
982 return false;
983}
984
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +0200985static bool __vxlan_sock_release_prep(struct vxlan_sock *vs)
stephen hemmingerd3428942012-10-01 12:32:35 +0000986{
Jiri Bencb1be00a2015-09-24 13:50:02 +0200987 struct vxlan_net *vn;
Pravin B Shelar012a5722013-08-19 11:23:07 -0700988
Jiri Bencb1be00a2015-09-24 13:50:02 +0200989 if (!vs)
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +0200990 return false;
Stephen Hemminger7c47ced2013-06-17 14:16:10 -0700991 if (!atomic_dec_and_test(&vs->refcnt))
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +0200992 return false;
Stephen Hemminger7c47ced2013-06-17 14:16:10 -0700993
Jiri Bencb1be00a2015-09-24 13:50:02 +0200994 vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id);
Stephen Hemminger1c51a912013-06-17 14:16:11 -0700995 spin_lock(&vn->sock_lock);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -0700996 hlist_del_rcu(&vs->hlist);
Alexander Duycke7b3db52016-06-16 12:20:52 -0700997 udp_tunnel_notify_del_rx_port(vs->sock,
Alexander Duyckb9adcd692016-06-16 12:23:19 -0700998 (vs->flags & VXLAN_F_GPE) ?
999 UDP_TUNNEL_TYPE_VXLAN_GPE :
Alexander Duycke7b3db52016-06-16 12:20:52 -07001000 UDP_TUNNEL_TYPE_VXLAN);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001001 spin_unlock(&vn->sock_lock);
1002
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001003 return true;
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001004}
1005
Jiri Bencb1be00a2015-09-24 13:50:02 +02001006static void vxlan_sock_release(struct vxlan_dev *vxlan)
1007{
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001008 bool ipv4 = __vxlan_sock_release_prep(vxlan->vn4_sock);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001009#if IS_ENABLED(CONFIG_IPV6)
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001010 bool ipv6 = __vxlan_sock_release_prep(vxlan->vn6_sock);
1011#endif
1012
1013 synchronize_net();
1014
1015 if (ipv4) {
1016 udp_tunnel_sock_release(vxlan->vn4_sock->sock);
1017 kfree(vxlan->vn4_sock);
1018 }
1019
1020#if IS_ENABLED(CONFIG_IPV6)
1021 if (ipv6) {
1022 udp_tunnel_sock_release(vxlan->vn6_sock->sock);
1023 kfree(vxlan->vn6_sock);
1024 }
Jiri Bencb1be00a2015-09-24 13:50:02 +02001025#endif
1026}
1027
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001028/* Update multicast group membership when first VNI on
Simon Hormanc4b49512015-04-02 11:17:58 +09001029 * multicast address is brought up
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001030 */
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001031static int vxlan_igmp_join(struct vxlan_dev *vxlan)
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001032{
Jiri Bencb1be00a2015-09-24 13:50:02 +02001033 struct sock *sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001034 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1035 int ifindex = vxlan->default_dst.remote_ifindex;
Marcelo Ricardo Leitner149d7542015-03-20 10:26:21 -03001036 int ret = -EINVAL;
stephen hemmingerd3428942012-10-01 12:32:35 +00001037
Cong Wange4c7ed42013-08-31 13:44:33 +08001038 if (ip->sa.sa_family == AF_INET) {
1039 struct ip_mreqn mreq = {
1040 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1041 .imr_ifindex = ifindex,
1042 };
1043
Jiri Bencb1be00a2015-09-24 13:50:02 +02001044 sk = vxlan->vn4_sock->sock->sk;
1045 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001046 ret = ip_mc_join_group(sk, &mreq);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001047 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001048#if IS_ENABLED(CONFIG_IPV6)
1049 } else {
Jiri Bencb1be00a2015-09-24 13:50:02 +02001050 sk = vxlan->vn6_sock->sock->sk;
1051 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001052 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1053 &ip->sin6.sin6_addr);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001054 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001055#endif
1056 }
stephen hemminger3fc2de22013-07-18 08:40:15 -07001057
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001058 return ret;
stephen hemminger3fc2de22013-07-18 08:40:15 -07001059}
1060
1061/* Inverse of vxlan_igmp_join when last VNI is brought down */
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001062static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
stephen hemminger3fc2de22013-07-18 08:40:15 -07001063{
Jiri Bencb1be00a2015-09-24 13:50:02 +02001064 struct sock *sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001065 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1066 int ifindex = vxlan->default_dst.remote_ifindex;
Marcelo Ricardo Leitner149d7542015-03-20 10:26:21 -03001067 int ret = -EINVAL;
stephen hemminger3fc2de22013-07-18 08:40:15 -07001068
Cong Wange4c7ed42013-08-31 13:44:33 +08001069 if (ip->sa.sa_family == AF_INET) {
1070 struct ip_mreqn mreq = {
1071 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1072 .imr_ifindex = ifindex,
1073 };
1074
Jiri Bencb1be00a2015-09-24 13:50:02 +02001075 sk = vxlan->vn4_sock->sock->sk;
1076 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001077 ret = ip_mc_leave_group(sk, &mreq);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001078 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001079#if IS_ENABLED(CONFIG_IPV6)
1080 } else {
Jiri Bencb1be00a2015-09-24 13:50:02 +02001081 sk = vxlan->vn6_sock->sock->sk;
1082 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001083 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1084 &ip->sin6.sin6_addr);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001085 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001086#endif
1087 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001088
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001089 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00001090}
1091
Jiri Bencf14eceb2016-02-16 21:59:01 +01001092static bool vxlan_remcsum(struct vxlanhdr *unparsed,
1093 struct sk_buff *skb, u32 vxflags)
Tom Herbertdfd86452015-01-12 17:00:38 -08001094{
Jiri Benc7d34fa72016-03-21 17:50:05 +01001095 size_t start, offset;
Tom Herbertdfd86452015-01-12 17:00:38 -08001096
Jiri Bencf14eceb2016-02-16 21:59:01 +01001097 if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload)
1098 goto out;
Tom Herbertb7fe10e2015-08-19 17:07:32 -07001099
Jiri Bencf14eceb2016-02-16 21:59:01 +01001100 start = vxlan_rco_start(unparsed->vx_vni);
1101 offset = start + vxlan_rco_offset(unparsed->vx_vni);
Tom Herbertdfd86452015-01-12 17:00:38 -08001102
Jiri Benc7d34fa72016-03-21 17:50:05 +01001103 if (!pskb_may_pull(skb, offset + sizeof(u16)))
Jiri Bencbe5cfea2016-02-16 21:58:59 +01001104 return false;
Tom Herbertdfd86452015-01-12 17:00:38 -08001105
Jiri Bencbe5cfea2016-02-16 21:58:59 +01001106 skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset,
1107 !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL));
Jiri Bencf14eceb2016-02-16 21:59:01 +01001108out:
1109 unparsed->vx_flags &= ~VXLAN_HF_RCO;
1110 unparsed->vx_vni &= VXLAN_VNI_MASK;
Jiri Bencbe5cfea2016-02-16 21:58:59 +01001111 return true;
Tom Herbertdfd86452015-01-12 17:00:38 -08001112}
1113
Jiri Bencf14eceb2016-02-16 21:59:01 +01001114static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed,
Jiri Benc64f87d32016-02-23 18:02:55 +01001115 struct sk_buff *skb, u32 vxflags,
Jiri Benc10a5af22016-02-23 18:02:59 +01001116 struct vxlan_metadata *md)
Jiri Benc3288af02016-02-16 21:59:00 +01001117{
Jiri Bencf14eceb2016-02-16 21:59:01 +01001118 struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed;
Jiri Benc10a5af22016-02-23 18:02:59 +01001119 struct metadata_dst *tun_dst;
Jiri Benc3288af02016-02-16 21:59:00 +01001120
Jiri Bencf14eceb2016-02-16 21:59:01 +01001121 if (!(unparsed->vx_flags & VXLAN_HF_GBP))
1122 goto out;
1123
Jiri Benc3288af02016-02-16 21:59:00 +01001124 md->gbp = ntohs(gbp->policy_id);
1125
Jiri Benc10a5af22016-02-23 18:02:59 +01001126 tun_dst = (struct metadata_dst *)skb_dst(skb);
David S. Miller810813c2016-03-08 12:34:12 -05001127 if (tun_dst) {
Jiri Benc3288af02016-02-16 21:59:00 +01001128 tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
David S. Miller810813c2016-03-08 12:34:12 -05001129 tun_dst->u.tun_info.options_len = sizeof(*md);
1130 }
Jiri Benc3288af02016-02-16 21:59:00 +01001131 if (gbp->dont_learn)
1132 md->gbp |= VXLAN_GBP_DONT_LEARN;
1133
1134 if (gbp->policy_applied)
1135 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
Jiri Bencf14eceb2016-02-16 21:59:01 +01001136
Jiri Benc64f87d32016-02-23 18:02:55 +01001137 /* In flow-based mode, GBP is carried in dst_metadata */
1138 if (!(vxflags & VXLAN_F_COLLECT_METADATA))
1139 skb->mark = md->gbp;
Jiri Bencf14eceb2016-02-16 21:59:01 +01001140out:
1141 unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
Jiri Benc3288af02016-02-16 21:59:00 +01001142}
1143
Jiri Bence1e53142016-04-05 14:47:13 +02001144static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed,
Jiri Benc61618ee2016-04-11 17:06:08 +02001145 __be16 *protocol,
Jiri Bence1e53142016-04-05 14:47:13 +02001146 struct sk_buff *skb, u32 vxflags)
1147{
1148 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed;
1149
1150 /* Need to have Next Protocol set for interfaces in GPE mode. */
1151 if (!gpe->np_applied)
1152 return false;
1153 /* "The initial version is 0. If a receiver does not support the
1154 * version indicated it MUST drop the packet.
1155 */
1156 if (gpe->version != 0)
1157 return false;
1158 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1159 * processing MUST occur." However, we don't implement OAM
1160 * processing, thus drop the packet.
1161 */
1162 if (gpe->oam_flag)
1163 return false;
1164
1165 switch (gpe->next_protocol) {
1166 case VXLAN_GPE_NP_IPV4:
1167 *protocol = htons(ETH_P_IP);
1168 break;
1169 case VXLAN_GPE_NP_IPV6:
1170 *protocol = htons(ETH_P_IPV6);
1171 break;
1172 case VXLAN_GPE_NP_ETHERNET:
1173 *protocol = htons(ETH_P_TEB);
1174 break;
1175 default:
1176 return false;
1177 }
1178
1179 unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS;
1180 return true;
1181}
1182
Jiri Benc1ab016e2016-02-23 18:02:56 +01001183static bool vxlan_set_mac(struct vxlan_dev *vxlan,
1184 struct vxlan_sock *vs,
1185 struct sk_buff *skb)
Thomas Graf614732e2015-07-21 10:44:06 +02001186{
Thomas Graf614732e2015-07-21 10:44:06 +02001187 union vxlan_addr saddr;
Thomas Graf614732e2015-07-21 10:44:06 +02001188
Thomas Graf614732e2015-07-21 10:44:06 +02001189 skb_reset_mac_header(skb);
Thomas Graf614732e2015-07-21 10:44:06 +02001190 skb->protocol = eth_type_trans(skb, vxlan->dev);
1191 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1192
1193 /* Ignore packet loops (and multicast echo) */
1194 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
Jiri Benc1ab016e2016-02-23 18:02:56 +01001195 return false;
Thomas Graf614732e2015-07-21 10:44:06 +02001196
Jiri Benc760c6802016-02-23 18:02:57 +01001197 /* Get address from the outer IP header */
Jiri Bencce212d02015-12-07 16:29:08 +01001198 if (vxlan_get_sk_family(vs) == AF_INET) {
Jiri Benc1ab016e2016-02-23 18:02:56 +01001199 saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
Thomas Graf614732e2015-07-21 10:44:06 +02001200 saddr.sa.sa_family = AF_INET;
1201#if IS_ENABLED(CONFIG_IPV6)
1202 } else {
Jiri Benc1ab016e2016-02-23 18:02:56 +01001203 saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
Thomas Graf614732e2015-07-21 10:44:06 +02001204 saddr.sa.sa_family = AF_INET6;
1205#endif
1206 }
1207
Jiri Benc1ab016e2016-02-23 18:02:56 +01001208 if ((vxlan->flags & VXLAN_F_LEARN) &&
1209 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source))
1210 return false;
1211
1212 return true;
1213}
1214
Jiri Benc760c6802016-02-23 18:02:57 +01001215static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph,
1216 struct sk_buff *skb)
1217{
1218 int err = 0;
1219
1220 if (vxlan_get_sk_family(vs) == AF_INET)
1221 err = IP_ECN_decapsulate(oiph, skb);
1222#if IS_ENABLED(CONFIG_IPV6)
1223 else
1224 err = IP6_ECN_decapsulate(oiph, skb);
1225#endif
1226
1227 if (unlikely(err) && log_ecn_error) {
1228 if (vxlan_get_sk_family(vs) == AF_INET)
1229 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1230 &((struct iphdr *)oiph)->saddr,
1231 ((struct iphdr *)oiph)->tos);
1232 else
1233 net_info_ratelimited("non-ECT from %pI6\n",
1234 &((struct ipv6hdr *)oiph)->saddr);
1235 }
1236 return err <= 1;
1237}
1238
stephen hemmingerd3428942012-10-01 12:32:35 +00001239/* Callback from net/ipv4/udp.c to receive packets */
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001240static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
stephen hemmingerd3428942012-10-01 12:32:35 +00001241{
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001242 struct pcpu_sw_netstats *stats;
Jiri Bencc9e78ef2016-02-18 11:22:51 +01001243 struct vxlan_dev *vxlan;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001244 struct vxlan_sock *vs;
Jiri Bencf14eceb2016-02-16 21:59:01 +01001245 struct vxlanhdr unparsed;
Thomas Grafee122c72015-07-21 10:43:58 +02001246 struct vxlan_metadata _md;
1247 struct vxlan_metadata *md = &_md;
Jiri Benc61618ee2016-04-11 17:06:08 +02001248 __be16 protocol = htons(ETH_P_TEB);
Jiri Bence1e53142016-04-05 14:47:13 +02001249 bool raw_proto = false;
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001250 void *oiph;
stephen hemmingerd3428942012-10-01 12:32:35 +00001251
Jiri Bence1e53142016-04-05 14:47:13 +02001252 /* Need UDP and VXLAN header to be present */
Pravin B Shelar7ce04752013-08-19 11:22:54 -07001253 if (!pskb_may_pull(skb, VXLAN_HLEN))
Hannes Frederic Sowae5aed002016-05-19 15:58:33 +02001254 goto drop;
stephen hemmingerd3428942012-10-01 12:32:35 +00001255
Jiri Bencf14eceb2016-02-16 21:59:01 +01001256 unparsed = *vxlan_hdr(skb);
Jiri Benc288b01c2016-02-16 21:59:02 +01001257 /* VNI flag always required to be set */
1258 if (!(unparsed.vx_flags & VXLAN_HF_VNI)) {
1259 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1260 ntohl(vxlan_hdr(skb)->vx_flags),
1261 ntohl(vxlan_hdr(skb)->vx_vni));
1262 /* Return non vxlan pkt */
Hannes Frederic Sowae5aed002016-05-19 15:58:33 +02001263 goto drop;
stephen hemmingerd3428942012-10-01 12:32:35 +00001264 }
Jiri Benc288b01c2016-02-16 21:59:02 +01001265 unparsed.vx_flags &= ~VXLAN_HF_VNI;
1266 unparsed.vx_vni &= ~VXLAN_VNI_MASK;
stephen hemmingerd3428942012-10-01 12:32:35 +00001267
Pravin B Shelar559835ea2013-09-24 10:25:40 -07001268 vs = rcu_dereference_sk_user_data(sk);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001269 if (!vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001270 goto drop;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001271
Jiri Bencc9e78ef2016-02-18 11:22:51 +01001272 vxlan = vxlan_vs_find_vni(vs, vxlan_vni(vxlan_hdr(skb)->vx_vni));
1273 if (!vxlan)
1274 goto drop;
1275
Jiri Bence1e53142016-04-05 14:47:13 +02001276 /* For backwards compatibility, only allow reserved fields to be
1277 * used by VXLAN extensions if explicitly requested.
1278 */
1279 if (vs->flags & VXLAN_F_GPE) {
1280 if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags))
1281 goto drop;
1282 raw_proto = true;
1283 }
1284
1285 if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto,
1286 !net_eq(vxlan->net, dev_net(vxlan->dev))))
1287 goto drop;
Jiri Bencc9e78ef2016-02-18 11:22:51 +01001288
Thomas Grafee122c72015-07-21 10:43:58 +02001289 if (vxlan_collect_metadata(vs)) {
Jiri Benc07dabf22016-02-18 19:19:29 +01001290 __be32 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);
Jiri Benc10a5af22016-02-23 18:02:59 +01001291 struct metadata_dst *tun_dst;
Jiri Benc07dabf22016-02-18 19:19:29 +01001292
Pravin B Shelarc29a70d2015-08-26 23:46:50 -07001293 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
Jiri Benc07dabf22016-02-18 19:19:29 +01001294 vxlan_vni_to_tun_id(vni), sizeof(*md));
Pravin B Shelarc29a70d2015-08-26 23:46:50 -07001295
Thomas Grafee122c72015-07-21 10:43:58 +02001296 if (!tun_dst)
1297 goto drop;
1298
Geert Uytterhoeven0f1b7352015-09-04 12:49:32 +02001299 md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
Jiri Benc10a5af22016-02-23 18:02:59 +01001300
1301 skb_dst_set(skb, (struct dst_entry *)tun_dst);
Thomas Grafee122c72015-07-21 10:43:58 +02001302 } else {
1303 memset(md, 0, sizeof(*md));
1304 }
1305
Jiri Bencf14eceb2016-02-16 21:59:01 +01001306 if (vs->flags & VXLAN_F_REMCSUM_RX)
1307 if (!vxlan_remcsum(&unparsed, skb, vs->flags))
1308 goto drop;
1309 if (vs->flags & VXLAN_F_GBP)
Jiri Benc10a5af22016-02-23 18:02:59 +01001310 vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md);
Jiri Bence1e53142016-04-05 14:47:13 +02001311 /* Note that GBP and GPE can never be active together. This is
1312 * ensured in vxlan_dev_configure.
1313 */
Thomas Graf35114942015-01-15 03:53:55 +01001314
Jiri Bencf14eceb2016-02-16 21:59:01 +01001315 if (unparsed.vx_flags || unparsed.vx_vni) {
Tom Herbert3bf39472015-01-08 12:31:18 -08001316 /* If there are any unprocessed flags remaining treat
1317 * this as a malformed packet. This behavior diverges from
1318 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1319 * in reserved fields are to be ignored. The approach here
Simon Hormanc4b49512015-04-02 11:17:58 +09001320 * maintains compatibility with previous stack code, and also
Tom Herbert3bf39472015-01-08 12:31:18 -08001321 * is more robust and provides a little more security in
1322 * adding extensions to VXLAN.
1323 */
Jiri Benc288b01c2016-02-16 21:59:02 +01001324 goto drop;
Tom Herbert3bf39472015-01-08 12:31:18 -08001325 }
1326
Jiri Bence1e53142016-04-05 14:47:13 +02001327 if (!raw_proto) {
1328 if (!vxlan_set_mac(vxlan, vs, skb))
1329 goto drop;
1330 } else {
Jiri Benc8be0cfa2016-05-13 10:48:42 +02001331 skb_reset_mac_header(skb);
Jiri Bence1e53142016-04-05 14:47:13 +02001332 skb->dev = vxlan->dev;
1333 skb->pkt_type = PACKET_HOST;
1334 }
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001335
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001336 oiph = skb_network_header(skb);
1337 skb_reset_network_header(skb);
1338
1339 if (!vxlan_ecn_decapsulate(vs, oiph, skb)) {
1340 ++vxlan->dev->stats.rx_frame_errors;
1341 ++vxlan->dev->stats.rx_errors;
1342 goto drop;
1343 }
1344
1345 stats = this_cpu_ptr(vxlan->dev->tstats);
1346 u64_stats_update_begin(&stats->syncp);
1347 stats->rx_packets++;
1348 stats->rx_bytes += skb->len;
1349 u64_stats_update_end(&stats->syncp);
1350
1351 gro_cells_receive(&vxlan->gro_cells, skb);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001352 return 0;
1353
1354drop:
Jiri Benc288b01c2016-02-16 21:59:02 +01001355 /* Consume bad packet */
1356 kfree_skb(skb);
1357 return 0;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001358}
1359
David Stevense4f67ad2012-11-20 02:50:14 +00001360static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
1361{
1362 struct vxlan_dev *vxlan = netdev_priv(dev);
1363 struct arphdr *parp;
1364 u8 *arpptr, *sha;
1365 __be32 sip, tip;
1366 struct neighbour *n;
1367
1368 if (dev->flags & IFF_NOARP)
1369 goto out;
1370
1371 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1372 dev->stats.tx_dropped++;
1373 goto out;
1374 }
1375 parp = arp_hdr(skb);
1376
1377 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1378 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1379 parp->ar_pro != htons(ETH_P_IP) ||
1380 parp->ar_op != htons(ARPOP_REQUEST) ||
1381 parp->ar_hln != dev->addr_len ||
1382 parp->ar_pln != 4)
1383 goto out;
1384 arpptr = (u8 *)parp + sizeof(struct arphdr);
1385 sha = arpptr;
1386 arpptr += dev->addr_len; /* sha */
1387 memcpy(&sip, arpptr, sizeof(sip));
1388 arpptr += sizeof(sip);
1389 arpptr += dev->addr_len; /* tha */
1390 memcpy(&tip, arpptr, sizeof(tip));
1391
1392 if (ipv4_is_loopback(tip) ||
1393 ipv4_is_multicast(tip))
1394 goto out;
1395
1396 n = neigh_lookup(&arp_tbl, &tip, dev);
1397
1398 if (n) {
David Stevense4f67ad2012-11-20 02:50:14 +00001399 struct vxlan_fdb *f;
1400 struct sk_buff *reply;
1401
1402 if (!(n->nud_state & NUD_CONNECTED)) {
1403 neigh_release(n);
1404 goto out;
1405 }
1406
1407 f = vxlan_find_mac(vxlan, n->ha);
Cong Wange4c7ed42013-08-31 13:44:33 +08001408 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
David Stevense4f67ad2012-11-20 02:50:14 +00001409 /* bridge-local neighbor */
1410 neigh_release(n);
1411 goto out;
1412 }
1413
1414 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1415 n->ha, sha);
1416
1417 neigh_release(n);
1418
David Stevens73461352014-03-18 12:32:29 -04001419 if (reply == NULL)
1420 goto out;
1421
David Stevense4f67ad2012-11-20 02:50:14 +00001422 skb_reset_mac_header(reply);
1423 __skb_pull(reply, skb_network_offset(reply));
1424 reply->ip_summed = CHECKSUM_UNNECESSARY;
1425 reply->pkt_type = PACKET_HOST;
1426
1427 if (netif_rx_ni(reply) == NET_RX_DROP)
1428 dev->stats.rx_dropped++;
Cong Wange4c7ed42013-08-31 13:44:33 +08001429 } else if (vxlan->flags & VXLAN_F_L3MISS) {
1430 union vxlan_addr ipa = {
1431 .sin.sin_addr.s_addr = tip,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001432 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001433 };
1434
1435 vxlan_ip_miss(dev, &ipa);
1436 }
David Stevense4f67ad2012-11-20 02:50:14 +00001437out:
1438 consume_skb(skb);
1439 return NETDEV_TX_OK;
1440}
1441
Cong Wangf564f452013-08-31 13:44:36 +08001442#if IS_ENABLED(CONFIG_IPV6)
David Stevens4b29dba2014-03-24 10:39:58 -04001443static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1444 struct neighbour *n, bool isrouter)
1445{
1446 struct net_device *dev = request->dev;
1447 struct sk_buff *reply;
1448 struct nd_msg *ns, *na;
1449 struct ipv6hdr *pip6;
1450 u8 *daddr;
1451 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1452 int ns_olen;
1453 int i, len;
1454
1455 if (dev == NULL)
1456 return NULL;
1457
1458 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1459 sizeof(*na) + na_olen + dev->needed_tailroom;
1460 reply = alloc_skb(len, GFP_ATOMIC);
1461 if (reply == NULL)
1462 return NULL;
1463
1464 reply->protocol = htons(ETH_P_IPV6);
1465 reply->dev = dev;
1466 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1467 skb_push(reply, sizeof(struct ethhdr));
Zhang Shengju6297b912016-03-03 01:16:54 +00001468 skb_reset_mac_header(reply);
David Stevens4b29dba2014-03-24 10:39:58 -04001469
1470 ns = (struct nd_msg *)skb_transport_header(request);
1471
1472 daddr = eth_hdr(request)->h_source;
1473 ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns);
1474 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1475 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1476 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1477 break;
1478 }
1479 }
1480
1481 /* Ethernet header */
1482 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1483 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1484 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1485 reply->protocol = htons(ETH_P_IPV6);
1486
1487 skb_pull(reply, sizeof(struct ethhdr));
Zhang Shengju6297b912016-03-03 01:16:54 +00001488 skb_reset_network_header(reply);
David Stevens4b29dba2014-03-24 10:39:58 -04001489 skb_put(reply, sizeof(struct ipv6hdr));
1490
1491 /* IPv6 header */
1492
1493 pip6 = ipv6_hdr(reply);
1494 memset(pip6, 0, sizeof(struct ipv6hdr));
1495 pip6->version = 6;
1496 pip6->priority = ipv6_hdr(request)->priority;
1497 pip6->nexthdr = IPPROTO_ICMPV6;
1498 pip6->hop_limit = 255;
1499 pip6->daddr = ipv6_hdr(request)->saddr;
1500 pip6->saddr = *(struct in6_addr *)n->primary_key;
1501
1502 skb_pull(reply, sizeof(struct ipv6hdr));
Zhang Shengju6297b912016-03-03 01:16:54 +00001503 skb_reset_transport_header(reply);
David Stevens4b29dba2014-03-24 10:39:58 -04001504
1505 na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen);
1506
1507 /* Neighbor Advertisement */
1508 memset(na, 0, sizeof(*na)+na_olen);
1509 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1510 na->icmph.icmp6_router = isrouter;
1511 na->icmph.icmp6_override = 1;
1512 na->icmph.icmp6_solicited = 1;
1513 na->target = ns->target;
1514 ether_addr_copy(&na->opt[2], n->ha);
1515 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1516 na->opt[1] = na_olen >> 3;
1517
1518 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1519 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1520 csum_partial(na, sizeof(*na)+na_olen, 0));
1521
1522 pip6->payload_len = htons(sizeof(*na)+na_olen);
1523
1524 skb_push(reply, sizeof(struct ipv6hdr));
1525
1526 reply->ip_summed = CHECKSUM_UNNECESSARY;
1527
1528 return reply;
1529}
1530
Cong Wangf564f452013-08-31 13:44:36 +08001531static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
1532{
1533 struct vxlan_dev *vxlan = netdev_priv(dev);
David Stevens4b29dba2014-03-24 10:39:58 -04001534 struct nd_msg *msg;
Cong Wangf564f452013-08-31 13:44:36 +08001535 const struct ipv6hdr *iphdr;
1536 const struct in6_addr *saddr, *daddr;
David Stevens4b29dba2014-03-24 10:39:58 -04001537 struct neighbour *n;
1538 struct inet6_dev *in6_dev;
Cong Wangf564f452013-08-31 13:44:36 +08001539
1540 in6_dev = __in6_dev_get(dev);
1541 if (!in6_dev)
1542 goto out;
1543
Cong Wangf564f452013-08-31 13:44:36 +08001544 iphdr = ipv6_hdr(skb);
1545 saddr = &iphdr->saddr;
1546 daddr = &iphdr->daddr;
1547
Cong Wangf564f452013-08-31 13:44:36 +08001548 msg = (struct nd_msg *)skb_transport_header(skb);
1549 if (msg->icmph.icmp6_code != 0 ||
1550 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1551 goto out;
1552
David Stevens4b29dba2014-03-24 10:39:58 -04001553 if (ipv6_addr_loopback(daddr) ||
1554 ipv6_addr_is_multicast(&msg->target))
1555 goto out;
1556
1557 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
Cong Wangf564f452013-08-31 13:44:36 +08001558
1559 if (n) {
1560 struct vxlan_fdb *f;
David Stevens4b29dba2014-03-24 10:39:58 -04001561 struct sk_buff *reply;
Cong Wangf564f452013-08-31 13:44:36 +08001562
1563 if (!(n->nud_state & NUD_CONNECTED)) {
1564 neigh_release(n);
1565 goto out;
1566 }
1567
1568 f = vxlan_find_mac(vxlan, n->ha);
1569 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1570 /* bridge-local neighbor */
1571 neigh_release(n);
1572 goto out;
1573 }
1574
David Stevens4b29dba2014-03-24 10:39:58 -04001575 reply = vxlan_na_create(skb, n,
1576 !!(f ? f->flags & NTF_ROUTER : 0));
1577
Cong Wangf564f452013-08-31 13:44:36 +08001578 neigh_release(n);
David Stevens4b29dba2014-03-24 10:39:58 -04001579
1580 if (reply == NULL)
1581 goto out;
1582
1583 if (netif_rx_ni(reply) == NET_RX_DROP)
1584 dev->stats.rx_dropped++;
1585
Cong Wangf564f452013-08-31 13:44:36 +08001586 } else if (vxlan->flags & VXLAN_F_L3MISS) {
David Stevens4b29dba2014-03-24 10:39:58 -04001587 union vxlan_addr ipa = {
1588 .sin6.sin6_addr = msg->target,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001589 .sin6.sin6_family = AF_INET6,
David Stevens4b29dba2014-03-24 10:39:58 -04001590 };
1591
Cong Wangf564f452013-08-31 13:44:36 +08001592 vxlan_ip_miss(dev, &ipa);
1593 }
1594
1595out:
1596 consume_skb(skb);
1597 return NETDEV_TX_OK;
1598}
1599#endif
1600
David Stevense4f67ad2012-11-20 02:50:14 +00001601static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1602{
1603 struct vxlan_dev *vxlan = netdev_priv(dev);
1604 struct neighbour *n;
David Stevense4f67ad2012-11-20 02:50:14 +00001605
1606 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1607 return false;
1608
1609 n = NULL;
1610 switch (ntohs(eth_hdr(skb)->h_proto)) {
1611 case ETH_P_IP:
Cong Wange15a00a2013-08-31 13:44:34 +08001612 {
1613 struct iphdr *pip;
1614
David Stevense4f67ad2012-11-20 02:50:14 +00001615 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1616 return false;
1617 pip = ip_hdr(skb);
1618 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
Cong Wange4c7ed42013-08-31 13:44:33 +08001619 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1620 union vxlan_addr ipa = {
1621 .sin.sin_addr.s_addr = pip->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001622 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001623 };
1624
1625 vxlan_ip_miss(dev, &ipa);
1626 return false;
1627 }
1628
David Stevense4f67ad2012-11-20 02:50:14 +00001629 break;
Cong Wange15a00a2013-08-31 13:44:34 +08001630 }
1631#if IS_ENABLED(CONFIG_IPV6)
1632 case ETH_P_IPV6:
1633 {
1634 struct ipv6hdr *pip6;
1635
1636 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1637 return false;
1638 pip6 = ipv6_hdr(skb);
1639 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
1640 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1641 union vxlan_addr ipa = {
1642 .sin6.sin6_addr = pip6->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001643 .sin6.sin6_family = AF_INET6,
Cong Wange15a00a2013-08-31 13:44:34 +08001644 };
1645
1646 vxlan_ip_miss(dev, &ipa);
1647 return false;
1648 }
1649
1650 break;
1651 }
1652#endif
David Stevense4f67ad2012-11-20 02:50:14 +00001653 default:
1654 return false;
1655 }
1656
1657 if (n) {
1658 bool diff;
1659
Joe Perches7367d0b2013-09-01 11:51:23 -07001660 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
David Stevense4f67ad2012-11-20 02:50:14 +00001661 if (diff) {
1662 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1663 dev->addr_len);
1664 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1665 }
1666 neigh_release(n);
1667 return diff;
Cong Wange4c7ed42013-08-31 13:44:33 +08001668 }
1669
David Stevense4f67ad2012-11-20 02:50:14 +00001670 return false;
1671}
1672
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001673static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
Thomas Graf35114942015-01-15 03:53:55 +01001674 struct vxlan_metadata *md)
1675{
1676 struct vxlanhdr_gbp *gbp;
1677
Thomas Grafdb79a622015-02-04 17:00:04 +01001678 if (!md->gbp)
1679 return;
1680
Thomas Graf35114942015-01-15 03:53:55 +01001681 gbp = (struct vxlanhdr_gbp *)vxh;
Jiri Benc54bfd872016-02-16 21:58:58 +01001682 vxh->vx_flags |= VXLAN_HF_GBP;
Thomas Graf35114942015-01-15 03:53:55 +01001683
1684 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1685 gbp->dont_learn = 1;
1686
1687 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1688 gbp->policy_applied = 1;
1689
1690 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1691}
1692
Jiri Bence1e53142016-04-05 14:47:13 +02001693static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags,
1694 __be16 protocol)
1695{
1696 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh;
1697
1698 gpe->np_applied = 1;
1699
1700 switch (protocol) {
1701 case htons(ETH_P_IP):
1702 gpe->next_protocol = VXLAN_GPE_NP_IPV4;
1703 return 0;
1704 case htons(ETH_P_IPV6):
1705 gpe->next_protocol = VXLAN_GPE_NP_IPV6;
1706 return 0;
1707 case htons(ETH_P_TEB):
1708 gpe->next_protocol = VXLAN_GPE_NP_ETHERNET;
1709 return 0;
1710 }
1711 return -EPFNOSUPPORT;
1712}
1713
Jiri Bencf491e562016-02-02 18:09:16 +01001714static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
1715 int iphdr_len, __be32 vni,
1716 struct vxlan_metadata *md, u32 vxflags,
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01001717 bool udp_sum)
Cong Wange4c7ed42013-08-31 13:44:33 +08001718{
Cong Wange4c7ed42013-08-31 13:44:33 +08001719 struct vxlanhdr *vxh;
Cong Wange4c7ed42013-08-31 13:44:33 +08001720 int min_headroom;
1721 int err;
Tom Herbertdfd86452015-01-12 17:00:38 -08001722 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
Jiri Bence1e53142016-04-05 14:47:13 +02001723 __be16 inner_protocol = htons(ETH_P_TEB);
Cong Wange4c7ed42013-08-31 13:44:33 +08001724
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001725 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
Tom Herbertdfd86452015-01-12 17:00:38 -08001726 skb->ip_summed == CHECKSUM_PARTIAL) {
1727 int csum_start = skb_checksum_start_offset(skb);
1728
1729 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1730 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1731 (skb->csum_offset == offsetof(struct udphdr, check) ||
Edward Creeb5708502016-02-11 20:57:17 +00001732 skb->csum_offset == offsetof(struct tcphdr, check)))
Tom Herbertdfd86452015-01-12 17:00:38 -08001733 type |= SKB_GSO_TUNNEL_REMCSUM;
Tom Herbertdfd86452015-01-12 17:00:38 -08001734 }
1735
Cong Wange4c7ed42013-08-31 13:44:33 +08001736 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
Jiri Bencf491e562016-02-02 18:09:16 +01001737 + VXLAN_HLEN + iphdr_len
Jiri Pirkodf8a39d2015-01-13 17:13:44 +01001738 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001739
1740 /* Need space for new headers (invalidates iph ptr) */
1741 err = skb_cow_head(skb, min_headroom);
Jiri Bence1e53142016-04-05 14:47:13 +02001742 if (unlikely(err))
1743 goto out_free;
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001744
Jiri Pirko59682502014-11-19 14:04:59 +01001745 skb = vlan_hwaccel_push_inside(skb);
1746 if (WARN_ON(!skb))
1747 return -ENOMEM;
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07001748
Alexander Duyckaed069d2016-04-14 15:33:37 -04001749 err = iptunnel_handle_offloads(skb, type);
1750 if (err)
1751 goto out_free;
Jesse Grossb736a622015-04-09 11:19:14 -07001752
Pravin B Shelar49560532013-08-19 11:23:17 -07001753 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
Jiri Benc54bfd872016-02-16 21:58:58 +01001754 vxh->vx_flags = VXLAN_HF_VNI;
1755 vxh->vx_vni = vxlan_vni_field(vni);
Pravin B Shelar49560532013-08-19 11:23:17 -07001756
Tom Herbertdfd86452015-01-12 17:00:38 -08001757 if (type & SKB_GSO_TUNNEL_REMCSUM) {
Jiri Benc54bfd872016-02-16 21:58:58 +01001758 unsigned int start;
Tom Herbertdfd86452015-01-12 17:00:38 -08001759
Jiri Benc54bfd872016-02-16 21:58:58 +01001760 start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr);
1761 vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset);
1762 vxh->vx_flags |= VXLAN_HF_RCO;
Tom Herbertdfd86452015-01-12 17:00:38 -08001763
1764 if (!skb_is_gso(skb)) {
1765 skb->ip_summed = CHECKSUM_NONE;
1766 skb->encapsulation = 0;
1767 }
1768 }
1769
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001770 if (vxflags & VXLAN_F_GBP)
1771 vxlan_build_gbp_hdr(vxh, vxflags, md);
Jiri Bence1e53142016-04-05 14:47:13 +02001772 if (vxflags & VXLAN_F_GPE) {
1773 err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol);
1774 if (err < 0)
1775 goto out_free;
1776 inner_protocol = skb->protocol;
1777 }
Thomas Graf35114942015-01-15 03:53:55 +01001778
Jiri Bence1e53142016-04-05 14:47:13 +02001779 skb_set_inner_protocol(skb, inner_protocol);
Pravin B Shelar039f5062015-12-24 14:34:54 -08001780 return 0;
Jiri Bence1e53142016-04-05 14:47:13 +02001781
1782out_free:
1783 kfree_skb(skb);
1784 return err;
Pravin B Shelar49560532013-08-19 11:23:17 -07001785}
Pravin B Shelar49560532013-08-19 11:23:17 -07001786
Jiri Benc1a8496b2016-02-02 18:09:14 +01001787static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan,
1788 struct sk_buff *skb, int oif, u8 tos,
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001789 __be32 daddr, __be32 *saddr,
1790 struct dst_cache *dst_cache,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001791 const struct ip_tunnel_info *info)
Jiri Benc1a8496b2016-02-02 18:09:14 +01001792{
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001793 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
Jiri Benc1a8496b2016-02-02 18:09:14 +01001794 struct rtable *rt = NULL;
1795 struct flowi4 fl4;
1796
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001797 if (tos && !info)
1798 use_cache = false;
1799 if (use_cache) {
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001800 rt = dst_cache_get_ip4(dst_cache, saddr);
1801 if (rt)
1802 return rt;
1803 }
1804
Jiri Benc1a8496b2016-02-02 18:09:14 +01001805 memset(&fl4, 0, sizeof(fl4));
1806 fl4.flowi4_oif = oif;
1807 fl4.flowi4_tos = RT_TOS(tos);
1808 fl4.flowi4_mark = skb->mark;
1809 fl4.flowi4_proto = IPPROTO_UDP;
1810 fl4.daddr = daddr;
pravin shelar272d96a2016-08-05 17:45:36 -07001811 fl4.saddr = *saddr;
Jiri Benc1a8496b2016-02-02 18:09:14 +01001812
1813 rt = ip_route_output_key(vxlan->net, &fl4);
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001814 if (!IS_ERR(rt)) {
Jiri Benc1a8496b2016-02-02 18:09:14 +01001815 *saddr = fl4.saddr;
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001816 if (use_cache)
1817 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
1818 }
Jiri Benc1a8496b2016-02-02 18:09:14 +01001819 return rt;
1820}
1821
Jiri Bence5d4b292015-12-07 13:04:30 +01001822#if IS_ENABLED(CONFIG_IPV6)
1823static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
Daniel Borkmann14006152016-03-04 15:15:08 +01001824 struct sk_buff *skb, int oif, u8 tos,
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01001825 __be32 label,
Jiri Bence5d4b292015-12-07 13:04:30 +01001826 const struct in6_addr *daddr,
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001827 struct in6_addr *saddr,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001828 struct dst_cache *dst_cache,
1829 const struct ip_tunnel_info *info)
Jiri Bence5d4b292015-12-07 13:04:30 +01001830{
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001831 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
Jiri Bence5d4b292015-12-07 13:04:30 +01001832 struct dst_entry *ndst;
1833 struct flowi6 fl6;
1834 int err;
1835
Daniel Borkmann14006152016-03-04 15:15:08 +01001836 if (tos && !info)
1837 use_cache = false;
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001838 if (use_cache) {
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001839 ndst = dst_cache_get_ip6(dst_cache, saddr);
1840 if (ndst)
1841 return ndst;
1842 }
1843
Jiri Bence5d4b292015-12-07 13:04:30 +01001844 memset(&fl6, 0, sizeof(fl6));
1845 fl6.flowi6_oif = oif;
1846 fl6.daddr = *daddr;
pravin shelar272d96a2016-08-05 17:45:36 -07001847 fl6.saddr = *saddr;
Daniel Borkmanneaa93bf2016-03-18 18:37:57 +01001848 fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label);
Jiri Bence5d4b292015-12-07 13:04:30 +01001849 fl6.flowi6_mark = skb->mark;
1850 fl6.flowi6_proto = IPPROTO_UDP;
1851
1852 err = ipv6_stub->ipv6_dst_lookup(vxlan->net,
1853 vxlan->vn6_sock->sock->sk,
1854 &ndst, &fl6);
1855 if (err < 0)
1856 return ERR_PTR(err);
1857
1858 *saddr = fl6.saddr;
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001859 if (use_cache)
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001860 dst_cache_set_ip6(dst_cache, ndst, saddr);
Jiri Bence5d4b292015-12-07 13:04:30 +01001861 return ndst;
1862}
1863#endif
1864
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001865/* Bypass encapsulation if the destination is local */
1866static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
1867 struct vxlan_dev *dst_vxlan)
1868{
Li RongQing8f849852014-01-04 13:57:59 +08001869 struct pcpu_sw_netstats *tx_stats, *rx_stats;
Cong Wange4c7ed42013-08-31 13:44:33 +08001870 union vxlan_addr loopback;
1871 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
Li RongQingce6502a2014-10-16 08:49:41 +08001872 struct net_device *dev = skb->dev;
1873 int len = skb->len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001874
Li RongQing8f849852014-01-04 13:57:59 +08001875 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
1876 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001877 skb->pkt_type = PACKET_HOST;
1878 skb->encapsulation = 0;
1879 skb->dev = dst_vxlan->dev;
1880 __skb_pull(skb, skb_network_offset(skb));
1881
Cong Wange4c7ed42013-08-31 13:44:33 +08001882 if (remote_ip->sa.sa_family == AF_INET) {
1883 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1884 loopback.sa.sa_family = AF_INET;
1885#if IS_ENABLED(CONFIG_IPV6)
1886 } else {
1887 loopback.sin6.sin6_addr = in6addr_loopback;
1888 loopback.sa.sa_family = AF_INET6;
1889#endif
1890 }
1891
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001892 if (dst_vxlan->flags & VXLAN_F_LEARN)
Cong Wange4c7ed42013-08-31 13:44:33 +08001893 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001894
1895 u64_stats_update_begin(&tx_stats->syncp);
1896 tx_stats->tx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08001897 tx_stats->tx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001898 u64_stats_update_end(&tx_stats->syncp);
1899
1900 if (netif_rx(skb) == NET_RX_SUCCESS) {
1901 u64_stats_update_begin(&rx_stats->syncp);
1902 rx_stats->rx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08001903 rx_stats->rx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001904 u64_stats_update_end(&rx_stats->syncp);
1905 } else {
Li RongQingce6502a2014-10-16 08:49:41 +08001906 dev->stats.rx_dropped++;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001907 }
1908}
1909
Stephen Hemminger4ad16932013-06-17 14:16:11 -07001910static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
1911 struct vxlan_rdst *rdst, bool did_rsc)
stephen hemmingerd3428942012-10-01 12:32:35 +00001912{
Paolo Abenid71785f2016-02-12 15:43:57 +01001913 struct dst_cache *dst_cache;
Thomas Graf3093fbe2015-07-21 10:44:00 +02001914 struct ip_tunnel_info *info;
stephen hemmingerd3428942012-10-01 12:32:35 +00001915 struct vxlan_dev *vxlan = netdev_priv(dev);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001916 struct sock *sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001917 struct rtable *rt = NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +00001918 const struct iphdr *old_iph;
Cong Wange4c7ed42013-08-31 13:44:33 +08001919 union vxlan_addr *dst;
pravin shelar272d96a2016-08-05 17:45:36 -07001920 union vxlan_addr remote_ip, local_ip;
1921 union vxlan_addr *src;
Thomas Grafee122c72015-07-21 10:43:58 +02001922 struct vxlan_metadata _md;
1923 struct vxlan_metadata *md = &_md;
Cong Wange4c7ed42013-08-31 13:44:33 +08001924 __be16 src_port = 0, dst_port;
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01001925 __be32 vni, label;
stephen hemmingerd3428942012-10-01 12:32:35 +00001926 __be16 df = 0;
1927 __u8 tos, ttl;
Pravin B Shelar0e6fbc52013-06-17 17:49:56 -07001928 int err;
Thomas Grafee122c72015-07-21 10:43:58 +02001929 u32 flags = vxlan->flags;
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01001930 bool udp_sum = false;
Jiri Bencf491e562016-02-02 18:09:16 +01001931 bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
stephen hemmingerd3428942012-10-01 12:32:35 +00001932
Jiri Benc61adedf2015-08-20 13:56:25 +02001933 info = skb_tunnel_info(skb);
Thomas Graf3093fbe2015-07-21 10:44:00 +02001934
Thomas Grafee122c72015-07-21 10:43:58 +02001935 if (rdst) {
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001936 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
Thomas Grafee122c72015-07-21 10:43:58 +02001937 vni = rdst->remote_vni;
1938 dst = &rdst->remote_ip;
pravin shelar272d96a2016-08-05 17:45:36 -07001939 src = &vxlan->cfg.saddr;
Paolo Abenid71785f2016-02-12 15:43:57 +01001940 dst_cache = &rdst->dst_cache;
Thomas Grafee122c72015-07-21 10:43:58 +02001941 } else {
1942 if (!info) {
1943 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1944 dev->name);
1945 goto drop;
1946 }
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001947 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
Jiri Benc54bfd872016-02-16 21:58:58 +01001948 vni = vxlan_tun_id_to_vni(info->key.tun_id);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001949 remote_ip.sa.sa_family = ip_tunnel_info_af(info);
pravin shelar272d96a2016-08-05 17:45:36 -07001950 if (remote_ip.sa.sa_family == AF_INET) {
Jiri Benca725e512015-08-20 13:56:30 +02001951 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
pravin shelar272d96a2016-08-05 17:45:36 -07001952 local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src;
1953 } else {
Jiri Benca725e512015-08-20 13:56:30 +02001954 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
pravin shelar272d96a2016-08-05 17:45:36 -07001955 local_ip.sin6.sin6_addr = info->key.u.ipv6.src;
1956 }
Thomas Grafee122c72015-07-21 10:43:58 +02001957 dst = &remote_ip;
pravin shelar272d96a2016-08-05 17:45:36 -07001958 src = &local_ip;
Paolo Abenid71785f2016-02-12 15:43:57 +01001959 dst_cache = &info->dst_cache;
Thomas Grafee122c72015-07-21 10:43:58 +02001960 }
David Stevense4f67ad2012-11-20 02:50:14 +00001961
Cong Wange4c7ed42013-08-31 13:44:33 +08001962 if (vxlan_addr_any(dst)) {
David Stevense4f67ad2012-11-20 02:50:14 +00001963 if (did_rsc) {
David Stevense4f67ad2012-11-20 02:50:14 +00001964 /* short-circuited back to local bridge */
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001965 vxlan_encap_bypass(skb, vxlan, vxlan);
Stephen Hemminger4ad16932013-06-17 14:16:11 -07001966 return;
David Stevense4f67ad2012-11-20 02:50:14 +00001967 }
stephen hemmingeref59feb2012-10-09 20:35:46 +00001968 goto drop;
David Stevense4f67ad2012-11-20 02:50:14 +00001969 }
stephen hemmingeref59feb2012-10-09 20:35:46 +00001970
stephen hemmingerd3428942012-10-01 12:32:35 +00001971 old_iph = ip_hdr(skb);
1972
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001973 ttl = vxlan->cfg.ttl;
Cong Wange4c7ed42013-08-31 13:44:33 +08001974 if (!ttl && vxlan_addr_multicast(dst))
stephen hemmingerd3428942012-10-01 12:32:35 +00001975 ttl = 1;
1976
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001977 tos = vxlan->cfg.tos;
stephen hemmingerd3428942012-10-01 12:32:35 +00001978 if (tos == 1)
Pravin B Shelar206aaaf2013-03-25 14:49:53 +00001979 tos = ip_tunnel_get_dsfield(old_iph, skb);
stephen hemmingerd3428942012-10-01 12:32:35 +00001980
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01001981 label = vxlan->cfg.label;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001982 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
1983 vxlan->cfg.port_max, true);
stephen hemmingerd3428942012-10-01 12:32:35 +00001984
Jiri Benca725e512015-08-20 13:56:30 +02001985 if (info) {
Jiri Benca725e512015-08-20 13:56:30 +02001986 ttl = info->key.ttl;
1987 tos = info->key.tos;
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01001988 label = info->key.label;
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01001989 udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
Jiri Benca725e512015-08-20 13:56:30 +02001990
1991 if (info->options_len)
Pravin B Shelar4c222792015-08-30 18:09:38 -07001992 md = ip_tunnel_info_opts(info);
Jiri Benca725e512015-08-20 13:56:30 +02001993 } else {
1994 md->gbp = skb->mark;
1995 }
1996
Cong Wange4c7ed42013-08-31 13:44:33 +08001997 if (dst->sa.sa_family == AF_INET) {
Jiri Bencb1be00a2015-09-24 13:50:02 +02001998 if (!vxlan->vn4_sock)
1999 goto drop;
2000 sk = vxlan->vn4_sock->sock->sk;
2001
Jiri Benc1a8496b2016-02-02 18:09:14 +01002002 rt = vxlan_get_route(vxlan, skb,
2003 rdst ? rdst->remote_ifindex : 0, tos,
pravin shelar272d96a2016-08-05 17:45:36 -07002004 dst->sin.sin_addr.s_addr,
2005 &src->sin.sin_addr.s_addr,
Paolo Abenid71785f2016-02-12 15:43:57 +01002006 dst_cache, info);
Cong Wange4c7ed42013-08-31 13:44:33 +08002007 if (IS_ERR(rt)) {
2008 netdev_dbg(dev, "no route to %pI4\n",
2009 &dst->sin.sin_addr.s_addr);
2010 dev->stats.tx_carrier_errors++;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002011 goto tx_error;
Cong Wange4c7ed42013-08-31 13:44:33 +08002012 }
2013
2014 if (rt->dst.dev == dev) {
2015 netdev_dbg(dev, "circular route to %pI4\n",
2016 &dst->sin.sin_addr.s_addr);
2017 dev->stats.collisions++;
Fan Dufffc15a2013-12-09 10:33:53 +08002018 goto rt_tx_error;
Cong Wange4c7ed42013-08-31 13:44:33 +08002019 }
2020
2021 /* Bypass encapsulation if the destination is local */
pravin shelarbbec7802016-08-05 17:45:37 -07002022 if (!info && rt->rt_flags & RTCF_LOCAL &&
Cong Wange4c7ed42013-08-31 13:44:33 +08002023 !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
2024 struct vxlan_dev *dst_vxlan;
2025
2026 ip_rt_put(rt);
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02002027 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
Thomas Grafac5132d2015-01-15 03:53:56 +01002028 dst->sa.sa_family, dst_port,
2029 vxlan->flags);
Cong Wange4c7ed42013-08-31 13:44:33 +08002030 if (!dst_vxlan)
2031 goto tx_error;
2032 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2033 return;
2034 }
2035
Alexander Duyck6ceb31c2016-02-19 11:26:31 -08002036 if (!info)
2037 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
2038 else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)
2039 df = htons(IP_DF);
2040
Cong Wange4c7ed42013-08-31 13:44:33 +08002041 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2042 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
Jiri Bencf491e562016-02-02 18:09:16 +01002043 err = vxlan_build_skb(skb, &rt->dst, sizeof(struct iphdr),
Jiri Benc54bfd872016-02-16 21:58:58 +01002044 vni, md, flags, udp_sum);
Jiri Bencf491e562016-02-02 18:09:16 +01002045 if (err < 0)
2046 goto xmit_tx_error;
2047
pravin shelar272d96a2016-08-05 17:45:36 -07002048 udp_tunnel_xmit_skb(rt, sk, skb, src->sin.sin_addr.s_addr,
Jiri Bencf491e562016-02-02 18:09:16 +01002049 dst->sin.sin_addr.s_addr, tos, ttl, df,
2050 src_port, dst_port, xnet, !udp_sum);
Cong Wange4c7ed42013-08-31 13:44:33 +08002051#if IS_ENABLED(CONFIG_IPV6)
2052 } else {
Cong Wange4c7ed42013-08-31 13:44:33 +08002053 struct dst_entry *ndst;
Jiri Benc6f264e42015-08-20 13:56:29 +02002054 u32 rt6i_flags;
Cong Wange4c7ed42013-08-31 13:44:33 +08002055
Jiri Bencb1be00a2015-09-24 13:50:02 +02002056 if (!vxlan->vn6_sock)
2057 goto drop;
2058 sk = vxlan->vn6_sock->sock->sk;
2059
Jiri Bence5d4b292015-12-07 13:04:30 +01002060 ndst = vxlan6_get_route(vxlan, skb,
Daniel Borkmann14006152016-03-04 15:15:08 +01002061 rdst ? rdst->remote_ifindex : 0, tos,
pravin shelar272d96a2016-08-05 17:45:36 -07002062 label, &dst->sin6.sin6_addr,
2063 &src->sin6.sin6_addr,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002064 dst_cache, info);
Jiri Bence5d4b292015-12-07 13:04:30 +01002065 if (IS_ERR(ndst)) {
Cong Wange4c7ed42013-08-31 13:44:33 +08002066 netdev_dbg(dev, "no route to %pI6\n",
2067 &dst->sin6.sin6_addr);
2068 dev->stats.tx_carrier_errors++;
2069 goto tx_error;
2070 }
2071
2072 if (ndst->dev == dev) {
2073 netdev_dbg(dev, "circular route to %pI6\n",
2074 &dst->sin6.sin6_addr);
2075 dst_release(ndst);
2076 dev->stats.collisions++;
2077 goto tx_error;
2078 }
2079
2080 /* Bypass encapsulation if the destination is local */
Jiri Benc6f264e42015-08-20 13:56:29 +02002081 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
pravin shelarbbec7802016-08-05 17:45:37 -07002082 if (!info && rt6i_flags & RTF_LOCAL &&
Jiri Benc6f264e42015-08-20 13:56:29 +02002083 !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
Cong Wange4c7ed42013-08-31 13:44:33 +08002084 struct vxlan_dev *dst_vxlan;
2085
2086 dst_release(ndst);
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02002087 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
Thomas Grafac5132d2015-01-15 03:53:56 +01002088 dst->sa.sa_family, dst_port,
2089 vxlan->flags);
Cong Wange4c7ed42013-08-31 13:44:33 +08002090 if (!dst_vxlan)
2091 goto tx_error;
2092 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2093 return;
2094 }
2095
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01002096 if (!info)
2097 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
Jesse Gross35e2d112016-01-20 16:22:47 -08002098
Daniel Borkmann14006152016-03-04 15:15:08 +01002099 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
Cong Wange4c7ed42013-08-31 13:44:33 +08002100 ttl = ttl ? : ip6_dst_hoplimit(ndst);
Jiri Bencf491e562016-02-02 18:09:16 +01002101 skb_scrub_packet(skb, xnet);
2102 err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
Jiri Benc54bfd872016-02-16 21:58:58 +01002103 vni, md, flags, udp_sum);
Jiri Bencf491e562016-02-02 18:09:16 +01002104 if (err < 0) {
2105 dst_release(ndst);
Haishuang Yan5e1e61a2016-09-04 18:52:51 +08002106 dev->stats.tx_errors++;
Jiri Bencf491e562016-02-02 18:09:16 +01002107 return;
2108 }
2109 udp_tunnel6_xmit_skb(ndst, sk, skb, dev,
pravin shelar272d96a2016-08-05 17:45:36 -07002110 &src->sin6.sin6_addr,
2111 &dst->sin6.sin6_addr, tos, ttl,
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002112 label, src_port, dst_port, !udp_sum);
Cong Wange4c7ed42013-08-31 13:44:33 +08002113#endif
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002114 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002115
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002116 return;
stephen hemmingerd3428942012-10-01 12:32:35 +00002117
2118drop:
2119 dev->stats.tx_dropped++;
2120 goto tx_free;
2121
Jiri Bencf491e562016-02-02 18:09:16 +01002122xmit_tx_error:
2123 /* skb is already freed. */
2124 skb = NULL;
Pravin B Shelar49560532013-08-19 11:23:17 -07002125rt_tx_error:
2126 ip_rt_put(rt);
stephen hemmingerd3428942012-10-01 12:32:35 +00002127tx_error:
2128 dev->stats.tx_errors++;
2129tx_free:
2130 dev_kfree_skb(skb);
stephen hemmingerd3428942012-10-01 12:32:35 +00002131}
2132
David Stevens66817122013-03-15 04:35:51 +00002133/* Transmit local packets over Vxlan
2134 *
2135 * Outer IP header inherits ECN and DF from inner header.
2136 * Outer UDP destination is the VXLAN assigned port.
2137 * source port is based on hash of flow
2138 */
2139static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2140{
2141 struct vxlan_dev *vxlan = netdev_priv(dev);
Thomas Graf3093fbe2015-07-21 10:44:00 +02002142 const struct ip_tunnel_info *info;
David Stevens66817122013-03-15 04:35:51 +00002143 struct ethhdr *eth;
2144 bool did_rsc = false;
Eric Dumazet8f646c92014-01-06 09:54:31 -08002145 struct vxlan_rdst *rdst, *fdst = NULL;
David Stevens66817122013-03-15 04:35:51 +00002146 struct vxlan_fdb *f;
David Stevens66817122013-03-15 04:35:51 +00002147
Jiri Benc61adedf2015-08-20 13:56:25 +02002148 info = skb_tunnel_info(skb);
Thomas Graf3093fbe2015-07-21 10:44:00 +02002149
David Stevens66817122013-03-15 04:35:51 +00002150 skb_reset_mac_header(skb);
David Stevens66817122013-03-15 04:35:51 +00002151
Jiri Benc47e5d1b2016-04-05 14:47:11 +02002152 if (vxlan->flags & VXLAN_F_COLLECT_METADATA) {
2153 if (info && info->mode & IP_TUNNEL_INFO_TX)
2154 vxlan_xmit_one(skb, dev, NULL, false);
2155 else
2156 kfree_skb(skb);
2157 return NETDEV_TX_OK;
2158 }
2159
2160 if (vxlan->flags & VXLAN_F_PROXY) {
2161 eth = eth_hdr(skb);
Cong Wangf564f452013-08-31 13:44:36 +08002162 if (ntohs(eth->h_proto) == ETH_P_ARP)
2163 return arp_reduce(dev, skb);
2164#if IS_ENABLED(CONFIG_IPV6)
2165 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
Li RongQing91269e32014-10-16 09:17:18 +08002166 pskb_may_pull(skb, sizeof(struct ipv6hdr)
2167 + sizeof(struct nd_msg)) &&
Cong Wangf564f452013-08-31 13:44:36 +08002168 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2169 struct nd_msg *msg;
2170
2171 msg = (struct nd_msg *)skb_transport_header(skb);
2172 if (msg->icmph.icmp6_code == 0 &&
2173 msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
2174 return neigh_reduce(dev, skb);
2175 }
2176#endif
2177 }
David Stevens66817122013-03-15 04:35:51 +00002178
Jiri Benc47e5d1b2016-04-05 14:47:11 +02002179 eth = eth_hdr(skb);
David Stevens66817122013-03-15 04:35:51 +00002180 f = vxlan_find_mac(vxlan, eth->h_dest);
David Stevensae884082013-04-19 00:36:26 +00002181 did_rsc = false;
2182
2183 if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) &&
Cong Wange15a00a2013-08-31 13:44:34 +08002184 (ntohs(eth->h_proto) == ETH_P_IP ||
2185 ntohs(eth->h_proto) == ETH_P_IPV6)) {
David Stevensae884082013-04-19 00:36:26 +00002186 did_rsc = route_shortcircuit(dev, skb);
2187 if (did_rsc)
2188 f = vxlan_find_mac(vxlan, eth->h_dest);
2189 }
2190
David Stevens66817122013-03-15 04:35:51 +00002191 if (f == NULL) {
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002192 f = vxlan_find_mac(vxlan, all_zeros_mac);
2193 if (f == NULL) {
2194 if ((vxlan->flags & VXLAN_F_L2MISS) &&
2195 !is_multicast_ether_addr(eth->h_dest))
2196 vxlan_fdb_miss(vxlan, eth->h_dest);
David Stevens66817122013-03-15 04:35:51 +00002197
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002198 dev->stats.tx_dropped++;
Eric Dumazet8f646c92014-01-06 09:54:31 -08002199 kfree_skb(skb);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002200 return NETDEV_TX_OK;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07002201 }
David Stevens66817122013-03-15 04:35:51 +00002202 }
2203
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002204 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2205 struct sk_buff *skb1;
2206
Eric Dumazet8f646c92014-01-06 09:54:31 -08002207 if (!fdst) {
2208 fdst = rdst;
2209 continue;
2210 }
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002211 skb1 = skb_clone(skb, GFP_ATOMIC);
2212 if (skb1)
2213 vxlan_xmit_one(skb1, dev, rdst, did_rsc);
2214 }
2215
Eric Dumazet8f646c92014-01-06 09:54:31 -08002216 if (fdst)
2217 vxlan_xmit_one(skb, dev, fdst, did_rsc);
2218 else
2219 kfree_skb(skb);
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002220 return NETDEV_TX_OK;
David Stevens66817122013-03-15 04:35:51 +00002221}
2222
stephen hemmingerd3428942012-10-01 12:32:35 +00002223/* Walk the forwarding table and purge stale entries */
2224static void vxlan_cleanup(unsigned long arg)
2225{
2226 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
2227 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2228 unsigned int h;
2229
2230 if (!netif_running(vxlan->dev))
2231 return;
2232
stephen hemmingerd3428942012-10-01 12:32:35 +00002233 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2234 struct hlist_node *p, *n;
Sorin Dumitru14e1d0f2015-05-26 10:42:04 +03002235
2236 spin_lock_bh(&vxlan->hash_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00002237 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2238 struct vxlan_fdb *f
2239 = container_of(p, struct vxlan_fdb, hlist);
2240 unsigned long timeout;
2241
stephen hemminger3c172862012-10-26 06:24:34 +00002242 if (f->state & NUD_PERMANENT)
stephen hemmingerd3428942012-10-01 12:32:35 +00002243 continue;
2244
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002245 timeout = f->used + vxlan->cfg.age_interval * HZ;
stephen hemmingerd3428942012-10-01 12:32:35 +00002246 if (time_before_eq(timeout, jiffies)) {
2247 netdev_dbg(vxlan->dev,
2248 "garbage collect %pM\n",
2249 f->eth_addr);
2250 f->state = NUD_STALE;
2251 vxlan_fdb_destroy(vxlan, f);
2252 } else if (time_before(timeout, next_timer))
2253 next_timer = timeout;
2254 }
Sorin Dumitru14e1d0f2015-05-26 10:42:04 +03002255 spin_unlock_bh(&vxlan->hash_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00002256 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002257
2258 mod_timer(&vxlan->age_timer, next_timer);
2259}
2260
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002261static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
2262{
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002263 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Jiri Benc54bfd872016-02-16 21:58:58 +01002264 __be32 vni = vxlan->default_dst.remote_vni;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002265
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002266 spin_lock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002267 hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002268 spin_unlock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002269}
2270
stephen hemmingerd3428942012-10-01 12:32:35 +00002271/* Setup stats when device is created */
2272static int vxlan_init(struct net_device *dev)
2273{
WANG Cong1c213bd2014-02-13 11:46:28 -08002274 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
Pravin B Shelare8171042013-03-25 14:49:46 +00002275 if (!dev->tstats)
stephen hemmingerd3428942012-10-01 12:32:35 +00002276 return -ENOMEM;
2277
2278 return 0;
2279}
2280
Stephen Hemmingerba609e92013-06-25 17:06:01 -07002281static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan)
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002282{
2283 struct vxlan_fdb *f;
2284
2285 spin_lock_bh(&vxlan->hash_lock);
2286 f = __vxlan_find_mac(vxlan, all_zeros_mac);
2287 if (f)
2288 vxlan_fdb_destroy(vxlan, f);
2289 spin_unlock_bh(&vxlan->hash_lock);
2290}
2291
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002292static void vxlan_uninit(struct net_device *dev)
2293{
2294 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002295
Stephen Hemmingerba609e92013-06-25 17:06:01 -07002296 vxlan_fdb_delete_default(vxlan);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002297
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002298 free_percpu(dev->tstats);
2299}
2300
stephen hemmingerd3428942012-10-01 12:32:35 +00002301/* Start ageing timer and join group when device is brought up */
2302static int vxlan_open(struct net_device *dev)
2303{
2304 struct vxlan_dev *vxlan = netdev_priv(dev);
Jiri Benc205f3562015-09-24 13:50:01 +02002305 int ret;
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002306
Jiri Benc205f3562015-09-24 13:50:01 +02002307 ret = vxlan_sock_add(vxlan);
2308 if (ret < 0)
2309 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002310
Gao feng79d4a942013-12-10 16:37:32 +08002311 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002312 ret = vxlan_igmp_join(vxlan);
Marcelo Ricardo Leitnerbef00572015-08-25 20:22:35 -03002313 if (ret == -EADDRINUSE)
2314 ret = 0;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002315 if (ret) {
Jiri Benc205f3562015-09-24 13:50:01 +02002316 vxlan_sock_release(vxlan);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002317 return ret;
2318 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002319 }
2320
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002321 if (vxlan->cfg.age_interval)
stephen hemmingerd3428942012-10-01 12:32:35 +00002322 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2323
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002324 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002325}
2326
2327/* Purge the forwarding table */
2328static void vxlan_flush(struct vxlan_dev *vxlan)
2329{
Cong Wang31fec5a2013-05-27 22:35:52 +00002330 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002331
2332 spin_lock_bh(&vxlan->hash_lock);
2333 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2334 struct hlist_node *p, *n;
2335 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2336 struct vxlan_fdb *f
2337 = container_of(p, struct vxlan_fdb, hlist);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002338 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2339 if (!is_zero_ether_addr(f->eth_addr))
2340 vxlan_fdb_destroy(vxlan, f);
stephen hemmingerd3428942012-10-01 12:32:35 +00002341 }
2342 }
2343 spin_unlock_bh(&vxlan->hash_lock);
2344}
2345
2346/* Cleanup timer and forwarding table on shutdown */
2347static int vxlan_stop(struct net_device *dev)
2348{
2349 struct vxlan_dev *vxlan = netdev_priv(dev);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002350 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002351 int ret = 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00002352
Marcelo Ricardo Leitner24c0e682015-03-23 16:23:12 -03002353 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
WANG Congf13b1682015-04-08 14:48:30 -07002354 !vxlan_group_used(vn, vxlan))
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002355 ret = vxlan_igmp_leave(vxlan);
stephen hemmingerd3428942012-10-01 12:32:35 +00002356
2357 del_timer_sync(&vxlan->age_timer);
2358
2359 vxlan_flush(vxlan);
Jiri Benc205f3562015-09-24 13:50:01 +02002360 vxlan_sock_release(vxlan);
stephen hemmingerd3428942012-10-01 12:32:35 +00002361
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002362 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002363}
2364
stephen hemmingerd3428942012-10-01 12:32:35 +00002365/* Stub, nothing needs to be done. */
2366static void vxlan_set_multicast_list(struct net_device *dev)
2367{
2368}
2369
David Wragg72564b52016-02-10 00:05:55 +00002370static int __vxlan_change_mtu(struct net_device *dev,
2371 struct net_device *lowerdev,
2372 struct vxlan_rdst *dst, int new_mtu, bool strict)
2373{
2374 int max_mtu = IP_MAX_MTU;
2375
2376 if (lowerdev)
2377 max_mtu = lowerdev->mtu;
2378
2379 if (dst->remote_ip.sa.sa_family == AF_INET6)
2380 max_mtu -= VXLAN6_HEADROOM;
2381 else
2382 max_mtu -= VXLAN_HEADROOM;
2383
2384 if (new_mtu < 68)
2385 return -EINVAL;
2386
2387 if (new_mtu > max_mtu) {
2388 if (strict)
2389 return -EINVAL;
2390
2391 new_mtu = max_mtu;
2392 }
2393
2394 dev->mtu = new_mtu;
2395 return 0;
2396}
2397
Daniel Borkmann345010b2013-12-18 00:21:08 +01002398static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2399{
2400 struct vxlan_dev *vxlan = netdev_priv(dev);
2401 struct vxlan_rdst *dst = &vxlan->default_dst;
David Wragg72564b52016-02-10 00:05:55 +00002402 struct net_device *lowerdev = __dev_get_by_index(vxlan->net,
2403 dst->remote_ifindex);
2404 return __vxlan_change_mtu(dev, lowerdev, dst, new_mtu, true);
Daniel Borkmann345010b2013-12-18 00:21:08 +01002405}
2406
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07002407static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
2408{
2409 struct vxlan_dev *vxlan = netdev_priv(dev);
2410 struct ip_tunnel_info *info = skb_tunnel_info(skb);
2411 __be16 sport, dport;
2412
2413 sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2414 vxlan->cfg.port_max, true);
2415 dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
2416
Jiri Benc239e9442015-12-07 13:04:31 +01002417 if (ip_tunnel_info_af(info) == AF_INET) {
Jiri Benc1a8496b2016-02-02 18:09:14 +01002418 struct rtable *rt;
2419
Jiri Benc239e9442015-12-07 13:04:31 +01002420 if (!vxlan->vn4_sock)
2421 return -EINVAL;
Jiri Benc1a8496b2016-02-02 18:09:14 +01002422 rt = vxlan_get_route(vxlan, skb, 0, info->key.tos,
2423 info->key.u.ipv4.dst,
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002424 &info->key.u.ipv4.src, NULL, info);
Jiri Benc1a8496b2016-02-02 18:09:14 +01002425 if (IS_ERR(rt))
2426 return PTR_ERR(rt);
2427 ip_rt_put(rt);
Jiri Benc239e9442015-12-07 13:04:31 +01002428 } else {
2429#if IS_ENABLED(CONFIG_IPV6)
2430 struct dst_entry *ndst;
2431
2432 if (!vxlan->vn6_sock)
2433 return -EINVAL;
Daniel Borkmann14006152016-03-04 15:15:08 +01002434 ndst = vxlan6_get_route(vxlan, skb, 0, info->key.tos,
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002435 info->key.label, &info->key.u.ipv6.dst,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002436 &info->key.u.ipv6.src, NULL, info);
Jiri Benc239e9442015-12-07 13:04:31 +01002437 if (IS_ERR(ndst))
2438 return PTR_ERR(ndst);
2439 dst_release(ndst);
Jiri Benc239e9442015-12-07 13:04:31 +01002440#else /* !CONFIG_IPV6 */
2441 return -EPFNOSUPPORT;
2442#endif
2443 }
Jiri Benc1a8496b2016-02-02 18:09:14 +01002444 info->key.tp_src = sport;
2445 info->key.tp_dst = dport;
Jiri Benc239e9442015-12-07 13:04:31 +01002446 return 0;
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07002447}
2448
Jiri Benc0c867c92016-04-05 14:47:10 +02002449static const struct net_device_ops vxlan_netdev_ether_ops = {
stephen hemmingerd3428942012-10-01 12:32:35 +00002450 .ndo_init = vxlan_init,
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002451 .ndo_uninit = vxlan_uninit,
stephen hemmingerd3428942012-10-01 12:32:35 +00002452 .ndo_open = vxlan_open,
2453 .ndo_stop = vxlan_stop,
2454 .ndo_start_xmit = vxlan_xmit,
Pravin B Shelare8171042013-03-25 14:49:46 +00002455 .ndo_get_stats64 = ip_tunnel_get_stats64,
stephen hemmingerd3428942012-10-01 12:32:35 +00002456 .ndo_set_rx_mode = vxlan_set_multicast_list,
Daniel Borkmann345010b2013-12-18 00:21:08 +01002457 .ndo_change_mtu = vxlan_change_mtu,
stephen hemmingerd3428942012-10-01 12:32:35 +00002458 .ndo_validate_addr = eth_validate_addr,
2459 .ndo_set_mac_address = eth_mac_addr,
2460 .ndo_fdb_add = vxlan_fdb_add,
2461 .ndo_fdb_del = vxlan_fdb_delete,
2462 .ndo_fdb_dump = vxlan_fdb_dump,
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07002463 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
stephen hemmingerd3428942012-10-01 12:32:35 +00002464};
2465
Jiri Bence1e53142016-04-05 14:47:13 +02002466static const struct net_device_ops vxlan_netdev_raw_ops = {
2467 .ndo_init = vxlan_init,
2468 .ndo_uninit = vxlan_uninit,
2469 .ndo_open = vxlan_open,
2470 .ndo_stop = vxlan_stop,
2471 .ndo_start_xmit = vxlan_xmit,
2472 .ndo_get_stats64 = ip_tunnel_get_stats64,
2473 .ndo_change_mtu = vxlan_change_mtu,
2474 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
2475};
2476
stephen hemmingerd3428942012-10-01 12:32:35 +00002477/* Info for udev, that this is a virtual tunnel endpoint */
2478static struct device_type vxlan_type = {
2479 .name = "vxlan",
2480};
2481
Sabrina Dubrocae5de25d2016-07-11 13:12:28 +02002482/* Calls the ndo_udp_tunnel_add of the caller in order to
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002483 * supply the listening VXLAN udp ports. Callers are expected
Sabrina Dubrocae5de25d2016-07-11 13:12:28 +02002484 * to implement the ndo_udp_tunnel_add.
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002485 */
Hannes Frederic Sowab7aade12016-04-18 21:19:47 +02002486static void vxlan_push_rx_ports(struct net_device *dev)
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002487{
2488 struct vxlan_sock *vs;
2489 struct net *net = dev_net(dev);
2490 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002491 unsigned int i;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002492
2493 spin_lock(&vn->sock_lock);
2494 for (i = 0; i < PORT_HASH_SIZE; ++i) {
Alexander Duycke7b3db52016-06-16 12:20:52 -07002495 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist)
2496 udp_tunnel_push_rx_port(dev, vs->sock,
Alexander Duyckb9adcd692016-06-16 12:23:19 -07002497 (vs->flags & VXLAN_F_GPE) ?
2498 UDP_TUNNEL_TYPE_VXLAN_GPE :
Alexander Duycke7b3db52016-06-16 12:20:52 -07002499 UDP_TUNNEL_TYPE_VXLAN);
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002500 }
2501 spin_unlock(&vn->sock_lock);
2502}
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002503
stephen hemmingerd3428942012-10-01 12:32:35 +00002504/* Initialize the device structure. */
2505static void vxlan_setup(struct net_device *dev)
2506{
2507 struct vxlan_dev *vxlan = netdev_priv(dev);
Cong Wang31fec5a2013-05-27 22:35:52 +00002508 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002509
Jiri Benc65226ef2016-04-28 16:36:30 +02002510 eth_hw_addr_random(dev);
2511 ether_setup(dev);
2512
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002513 dev->destructor = free_netdev;
stephen hemmingerd3428942012-10-01 12:32:35 +00002514 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2515
stephen hemmingerd3428942012-10-01 12:32:35 +00002516 dev->features |= NETIF_F_LLTX;
Joseph Gasparakisd6727fe2012-12-07 14:14:16 +00002517 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002518 dev->features |= NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002519 dev->features |= NETIF_F_GSO_SOFTWARE;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002520
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07002521 dev->vlan_features = dev->features;
2522 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002523 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002524 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07002525 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
Eric Dumazet02875872014-10-05 18:38:35 -07002526 netif_keep_dst(dev);
Jiri Benc0c867c92016-04-05 14:47:10 +02002527 dev->priv_flags |= IFF_NO_QUEUE;
stephen hemmingerd3428942012-10-01 12:32:35 +00002528
stephen hemminger553675f2013-05-16 11:35:20 +00002529 INIT_LIST_HEAD(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00002530 spin_lock_init(&vxlan->hash_lock);
2531
2532 init_timer_deferrable(&vxlan->age_timer);
2533 vxlan->age_timer.function = vxlan_cleanup;
2534 vxlan->age_timer.data = (unsigned long) vxlan;
2535
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002536 vxlan->cfg.dst_port = htons(vxlan_port);
stephen hemminger05f47d62012-10-09 20:35:50 +00002537
stephen hemmingerd3428942012-10-01 12:32:35 +00002538 vxlan->dev = dev;
2539
Tom Herbert58ce31c2015-08-19 17:07:33 -07002540 gro_cells_init(&vxlan->gro_cells, dev);
2541
stephen hemmingerd3428942012-10-01 12:32:35 +00002542 for (h = 0; h < FDB_HASH_SIZE; ++h)
2543 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2544}
2545
Jiri Benc0c867c92016-04-05 14:47:10 +02002546static void vxlan_ether_setup(struct net_device *dev)
2547{
Jiri Benc0c867c92016-04-05 14:47:10 +02002548 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
2549 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2550 dev->netdev_ops = &vxlan_netdev_ether_ops;
2551}
2552
Jiri Bence1e53142016-04-05 14:47:13 +02002553static void vxlan_raw_setup(struct net_device *dev)
2554{
Jiri Benc65226ef2016-04-28 16:36:30 +02002555 dev->header_ops = NULL;
Jiri Bence1e53142016-04-05 14:47:13 +02002556 dev->type = ARPHRD_NONE;
2557 dev->hard_header_len = 0;
2558 dev->addr_len = 0;
Jiri Bence1e53142016-04-05 14:47:13 +02002559 dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2560 dev->netdev_ops = &vxlan_netdev_raw_ops;
2561}
2562
stephen hemmingerd3428942012-10-01 12:32:35 +00002563static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2564 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
stephen hemminger5d174dd2013-04-27 11:31:55 +00002565 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002566 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002567 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2568 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002569 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002570 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2571 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002572 [IFLA_VXLAN_LABEL] = { .type = NLA_U32 },
stephen hemmingerd3428942012-10-01 12:32:35 +00002573 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2574 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2575 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
stephen hemminger05f47d62012-10-09 20:35:50 +00002576 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
David Stevense4f67ad2012-11-20 02:50:14 +00002577 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2578 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2579 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2580 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
Alexei Starovoitovf8a9b1b2015-07-30 20:10:22 -07002581 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
stephen hemminger823aa872013-04-27 11:31:57 +00002582 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
Tom Herbert5c91ae02014-11-06 18:06:01 -08002583 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2584 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2585 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
Tom Herbertdfd86452015-01-12 17:00:38 -08002586 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2587 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
Thomas Graf35114942015-01-15 03:53:55 +01002588 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
Jiri Bence1e53142016-04-05 14:47:13 +02002589 [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, },
Tom Herbert0ace2ca2015-02-10 16:30:32 -08002590 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
stephen hemmingerd3428942012-10-01 12:32:35 +00002591};
2592
2593static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
2594{
2595 if (tb[IFLA_ADDRESS]) {
2596 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2597 pr_debug("invalid link address (not ethernet)\n");
2598 return -EINVAL;
2599 }
2600
2601 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2602 pr_debug("invalid all zero ethernet address\n");
2603 return -EADDRNOTAVAIL;
2604 }
2605 }
2606
2607 if (!data)
2608 return -EINVAL;
2609
2610 if (data[IFLA_VXLAN_ID]) {
2611 __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2612 if (id >= VXLAN_VID_MASK)
2613 return -ERANGE;
2614 }
2615
stephen hemminger05f47d62012-10-09 20:35:50 +00002616 if (data[IFLA_VXLAN_PORT_RANGE]) {
2617 const struct ifla_vxlan_port_range *p
2618 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2619
2620 if (ntohs(p->high) < ntohs(p->low)) {
2621 pr_debug("port range %u .. %u not valid\n",
2622 ntohs(p->low), ntohs(p->high));
2623 return -EINVAL;
2624 }
2625 }
2626
stephen hemmingerd3428942012-10-01 12:32:35 +00002627 return 0;
2628}
2629
Yan Burman1b13c972013-01-29 23:43:07 +00002630static void vxlan_get_drvinfo(struct net_device *netdev,
2631 struct ethtool_drvinfo *drvinfo)
2632{
2633 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2634 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2635}
2636
2637static const struct ethtool_ops vxlan_ethtool_ops = {
2638 .get_drvinfo = vxlan_get_drvinfo,
2639 .get_link = ethtool_op_get_link,
2640};
2641
Tom Herbert3ee64f32014-07-13 19:49:42 -07002642static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2643 __be16 port, u32 flags)
stephen hemminger553675f2013-05-16 11:35:20 +00002644{
Cong Wange4c7ed42013-08-31 13:44:33 +08002645 struct socket *sock;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002646 struct udp_port_cfg udp_conf;
2647 int err;
Cong Wange4c7ed42013-08-31 13:44:33 +08002648
Tom Herbert3ee64f32014-07-13 19:49:42 -07002649 memset(&udp_conf, 0, sizeof(udp_conf));
2650
2651 if (ipv6) {
2652 udp_conf.family = AF_INET6;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002653 udp_conf.use_udp6_rx_checksums =
Alexander Duyck3dc2b6a2014-11-24 20:08:38 -08002654 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
Jiri Benca43a9ef2015-08-28 20:48:22 +02002655 udp_conf.ipv6_v6only = 1;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002656 } else {
2657 udp_conf.family = AF_INET;
Cong Wange4c7ed42013-08-31 13:44:33 +08002658 }
2659
Tom Herbert3ee64f32014-07-13 19:49:42 -07002660 udp_conf.local_udp_port = port;
Cong Wange4c7ed42013-08-31 13:44:33 +08002661
Tom Herbert3ee64f32014-07-13 19:49:42 -07002662 /* Open UDP socket */
2663 err = udp_sock_create(net, &udp_conf, &sock);
2664 if (err < 0)
2665 return ERR_PTR(err);
Cong Wange4c7ed42013-08-31 13:44:33 +08002666
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002667 return sock;
Cong Wange4c7ed42013-08-31 13:44:33 +08002668}
2669
2670/* Create new listen socket if needed */
Jiri Bencb1be00a2015-09-24 13:50:02 +02002671static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
2672 __be16 port, u32 flags)
Cong Wange4c7ed42013-08-31 13:44:33 +08002673{
2674 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2675 struct vxlan_sock *vs;
2676 struct socket *sock;
Cong Wang31fec5a2013-05-27 22:35:52 +00002677 unsigned int h;
Andy Zhouacbf74a2014-09-16 17:31:18 -07002678 struct udp_tunnel_sock_cfg tunnel_cfg;
stephen hemminger553675f2013-05-16 11:35:20 +00002679
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02002680 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
Cong Wange4c7ed42013-08-31 13:44:33 +08002681 if (!vs)
stephen hemminger553675f2013-05-16 11:35:20 +00002682 return ERR_PTR(-ENOMEM);
2683
2684 for (h = 0; h < VNI_HASH_SIZE; ++h)
2685 INIT_HLIST_HEAD(&vs->vni_list[h]);
2686
Tom Herbert3ee64f32014-07-13 19:49:42 -07002687 sock = vxlan_create_sock(net, ipv6, port, flags);
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002688 if (IS_ERR(sock)) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002689 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port),
2690 PTR_ERR(sock));
stephen hemminger553675f2013-05-16 11:35:20 +00002691 kfree(vs);
Duan Jionge50fddc2013-11-01 13:09:43 +08002692 return ERR_CAST(sock);
stephen hemminger553675f2013-05-16 11:35:20 +00002693 }
2694
Cong Wange4c7ed42013-08-31 13:44:33 +08002695 vs->sock = sock;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002696 atomic_set(&vs->refcnt, 1);
Tom Herbertaf33c1a2015-01-20 11:23:05 -08002697 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
stephen hemminger553675f2013-05-16 11:35:20 +00002698
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002699 spin_lock(&vn->sock_lock);
2700 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
Alexander Duycke7b3db52016-06-16 12:20:52 -07002701 udp_tunnel_notify_add_rx_port(sock,
Alexander Duyckb9adcd692016-06-16 12:23:19 -07002702 (vs->flags & VXLAN_F_GPE) ?
2703 UDP_TUNNEL_TYPE_VXLAN_GPE :
Alexander Duycke7b3db52016-06-16 12:20:52 -07002704 UDP_TUNNEL_TYPE_VXLAN);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002705 spin_unlock(&vn->sock_lock);
stephen hemminger553675f2013-05-16 11:35:20 +00002706
2707 /* Mark socket as an encapsulation socket. */
Tom Herbert5602c482016-04-05 08:22:53 -07002708 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
Andy Zhouacbf74a2014-09-16 17:31:18 -07002709 tunnel_cfg.sk_user_data = vs;
2710 tunnel_cfg.encap_type = 1;
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01002711 tunnel_cfg.encap_rcv = vxlan_rcv;
Andy Zhouacbf74a2014-09-16 17:31:18 -07002712 tunnel_cfg.encap_destroy = NULL;
Tom Herbert5602c482016-04-05 08:22:53 -07002713 tunnel_cfg.gro_receive = vxlan_gro_receive;
2714 tunnel_cfg.gro_complete = vxlan_gro_complete;
Andy Zhouacbf74a2014-09-16 17:31:18 -07002715
2716 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
Cong Wange4c7ed42013-08-31 13:44:33 +08002717
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002718 return vs;
2719}
stephen hemminger553675f2013-05-16 11:35:20 +00002720
Jiri Bencb1be00a2015-09-24 13:50:02 +02002721static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6)
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002722{
Jiri Benc205f3562015-09-24 13:50:01 +02002723 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2724 struct vxlan_sock *vs = NULL;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002725
Jiri Benc205f3562015-09-24 13:50:01 +02002726 if (!vxlan->cfg.no_share) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002727 spin_lock(&vn->sock_lock);
Jiri Benc205f3562015-09-24 13:50:01 +02002728 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
2729 vxlan->cfg.dst_port, vxlan->flags);
2730 if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002731 spin_unlock(&vn->sock_lock);
Jiri Benc205f3562015-09-24 13:50:01 +02002732 return -EBUSY;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002733 }
2734 spin_unlock(&vn->sock_lock);
2735 }
Jiri Benc205f3562015-09-24 13:50:01 +02002736 if (!vs)
Jiri Bencb1be00a2015-09-24 13:50:02 +02002737 vs = vxlan_socket_create(vxlan->net, ipv6,
2738 vxlan->cfg.dst_port, vxlan->flags);
Jiri Benc205f3562015-09-24 13:50:01 +02002739 if (IS_ERR(vs))
2740 return PTR_ERR(vs);
Jiri Bencb1be00a2015-09-24 13:50:02 +02002741#if IS_ENABLED(CONFIG_IPV6)
2742 if (ipv6)
2743 vxlan->vn6_sock = vs;
2744 else
2745#endif
2746 vxlan->vn4_sock = vs;
Jiri Benc205f3562015-09-24 13:50:01 +02002747 vxlan_vs_add_dev(vs, vxlan);
2748 return 0;
stephen hemminger553675f2013-05-16 11:35:20 +00002749}
2750
Jiri Bencb1be00a2015-09-24 13:50:02 +02002751static int vxlan_sock_add(struct vxlan_dev *vxlan)
2752{
2753 bool ipv6 = vxlan->flags & VXLAN_F_IPV6;
2754 bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA;
2755 int ret = 0;
2756
2757 vxlan->vn4_sock = NULL;
2758#if IS_ENABLED(CONFIG_IPV6)
2759 vxlan->vn6_sock = NULL;
2760 if (ipv6 || metadata)
2761 ret = __vxlan_sock_add(vxlan, true);
2762#endif
2763 if (!ret && (!ipv6 || metadata))
2764 ret = __vxlan_sock_add(vxlan, false);
2765 if (ret < 0)
2766 vxlan_sock_release(vxlan);
2767 return ret;
2768}
2769
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002770static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
2771 struct vxlan_config *conf)
stephen hemmingerd3428942012-10-01 12:32:35 +00002772{
Nicolas Dichtel33564bb2015-01-26 22:28:14 +01002773 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
Nicolas Dichtel07b9b372016-01-07 11:26:53 +01002774 struct vxlan_dev *vxlan = netdev_priv(dev), *tmp;
Atzm Watanabec7995c42013-04-16 02:50:52 +00002775 struct vxlan_rdst *dst = &vxlan->default_dst;
Jiri Bencb1be00a2015-09-24 13:50:02 +02002776 unsigned short needed_headroom = ETH_HLEN;
stephen hemmingerd3428942012-10-01 12:32:35 +00002777 int err;
Cong Wange4c7ed42013-08-31 13:44:33 +08002778 bool use_ipv6 = false;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002779 __be16 default_port = vxlan->cfg.dst_port;
David Wragg7e059152016-02-10 00:05:58 +00002780 struct net_device *lowerdev = NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +00002781
Jiri Bence1e53142016-04-05 14:47:13 +02002782 if (conf->flags & VXLAN_F_GPE) {
2783 if (conf->flags & ~VXLAN_F_ALLOWED_GPE)
2784 return -EINVAL;
2785 /* For now, allow GPE only together with COLLECT_METADATA.
2786 * This can be relaxed later; in such case, the other side
2787 * of the PtP link will have to be provided.
2788 */
2789 if (!(conf->flags & VXLAN_F_COLLECT_METADATA))
2790 return -EINVAL;
2791
2792 vxlan_raw_setup(dev);
2793 } else {
2794 vxlan_ether_setup(dev);
2795 }
Jiri Benc0c867c92016-04-05 14:47:10 +02002796
Nicolas Dichtel33564bb2015-01-26 22:28:14 +01002797 vxlan->net = src_net;
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002798
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002799 dst->remote_vni = conf->vni;
2800
2801 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
stephen hemmingerd3428942012-10-01 12:32:35 +00002802
Mike Rapoport5933a7b2014-04-01 09:23:01 +03002803 /* Unless IPv6 is explicitly requested, assume IPv4 */
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002804 if (!dst->remote_ip.sa.sa_family)
2805 dst->remote_ip.sa.sa_family = AF_INET;
stephen hemmingerd3428942012-10-01 12:32:35 +00002806
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002807 if (dst->remote_ip.sa.sa_family == AF_INET6 ||
Jiri Benc057ba292015-09-17 16:11:11 +02002808 vxlan->cfg.saddr.sa.sa_family == AF_INET6) {
2809 if (!IS_ENABLED(CONFIG_IPV6))
2810 return -EPFNOSUPPORT;
Cong Wange4c7ed42013-08-31 13:44:33 +08002811 use_ipv6 = true;
Jiri Bencb1be00a2015-09-24 13:50:02 +02002812 vxlan->flags |= VXLAN_F_IPV6;
Jiri Benc057ba292015-09-17 16:11:11 +02002813 }
Cong Wange4c7ed42013-08-31 13:44:33 +08002814
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002815 if (conf->label && !use_ipv6) {
2816 pr_info("label only supported in use with IPv6\n");
2817 return -EINVAL;
2818 }
2819
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002820 if (conf->remote_ifindex) {
David Wragg7e059152016-02-10 00:05:58 +00002821 lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex);
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002822 dst->remote_ifindex = conf->remote_ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +00002823
stephen hemminger34e02aa2012-10-09 20:35:53 +00002824 if (!lowerdev) {
Atzm Watanabec7995c42013-04-16 02:50:52 +00002825 pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
stephen hemminger34e02aa2012-10-09 20:35:53 +00002826 return -ENODEV;
stephen hemmingerd3428942012-10-01 12:32:35 +00002827 }
stephen hemminger34e02aa2012-10-09 20:35:53 +00002828
Cong Wange4c7ed42013-08-31 13:44:33 +08002829#if IS_ENABLED(CONFIG_IPV6)
2830 if (use_ipv6) {
2831 struct inet6_dev *idev = __in6_dev_get(lowerdev);
2832 if (idev && idev->cnf.disable_ipv6) {
2833 pr_info("IPv6 is disabled via sysctl\n");
2834 return -EPERM;
2835 }
Cong Wange4c7ed42013-08-31 13:44:33 +08002836 }
2837#endif
2838
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002839 if (!conf->mtu)
Cong Wange4c7ed42013-08-31 13:44:33 +08002840 dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
Alexander Duyck1ba56fb2012-11-13 13:10:59 +00002841
Jiri Bencb1be00a2015-09-24 13:50:02 +02002842 needed_headroom = lowerdev->hard_header_len;
Jiri Benc9dc2ad12015-09-17 16:11:10 +02002843 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002844
David Wragg7e059152016-02-10 00:05:58 +00002845 if (conf->mtu) {
2846 err = __vxlan_change_mtu(dev, lowerdev, dst, conf->mtu, false);
2847 if (err)
2848 return err;
2849 }
2850
Jiri Bencb1be00a2015-09-24 13:50:02 +02002851 if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
2852 needed_headroom += VXLAN6_HEADROOM;
2853 else
2854 needed_headroom += VXLAN_HEADROOM;
2855 dev->needed_headroom = needed_headroom;
2856
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002857 memcpy(&vxlan->cfg, conf, sizeof(*conf));
Jiri Bence1e53142016-04-05 14:47:13 +02002858 if (!vxlan->cfg.dst_port) {
2859 if (conf->flags & VXLAN_F_GPE)
2860 vxlan->cfg.dst_port = 4790; /* IANA assigned VXLAN-GPE port */
2861 else
2862 vxlan->cfg.dst_port = default_port;
2863 }
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002864 vxlan->flags |= conf->flags;
stephen hemmingerd3428942012-10-01 12:32:35 +00002865
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002866 if (!vxlan->cfg.age_interval)
2867 vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
Vincent Bernatafb97182012-10-30 10:27:16 +00002868
Nicolas Dichtel07b9b372016-01-07 11:26:53 +01002869 list_for_each_entry(tmp, &vn->vxlan_list, next) {
2870 if (tmp->cfg.vni == conf->vni &&
2871 (tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 ||
2872 tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 &&
2873 tmp->cfg.dst_port == vxlan->cfg.dst_port &&
2874 (tmp->flags & VXLAN_F_RCV_FLAGS) ==
2875 (vxlan->flags & VXLAN_F_RCV_FLAGS))
stephen hemminger553675f2013-05-16 11:35:20 +00002876 return -EEXIST;
Nicolas Dichtel07b9b372016-01-07 11:26:53 +01002877 }
stephen hemminger553675f2013-05-16 11:35:20 +00002878
Wilfried Klaebe7ad24ea2014-05-11 00:12:32 +00002879 dev->ethtool_ops = &vxlan_ethtool_ops;
Yan Burman1b13c972013-01-29 23:43:07 +00002880
Sridhar Samudrala2936b6a2013-09-17 12:12:40 -07002881 /* create an fdb entry for a valid default destination */
2882 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
2883 err = vxlan_fdb_create(vxlan, all_zeros_mac,
2884 &vxlan->default_dst.remote_ip,
2885 NUD_REACHABLE|NUD_PERMANENT,
2886 NLM_F_EXCL|NLM_F_CREATE,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002887 vxlan->cfg.dst_port,
Sridhar Samudrala2936b6a2013-09-17 12:12:40 -07002888 vxlan->default_dst.remote_vni,
2889 vxlan->default_dst.remote_ifindex,
2890 NTF_SELF);
2891 if (err)
2892 return err;
2893 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002894
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002895 err = register_netdevice(dev);
2896 if (err) {
Stephen Hemmingerba609e92013-06-25 17:06:01 -07002897 vxlan_fdb_delete_default(vxlan);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002898 return err;
2899 }
2900
stephen hemminger553675f2013-05-16 11:35:20 +00002901 list_add(&vxlan->next, &vn->vxlan_list);
stephen hemminger553675f2013-05-16 11:35:20 +00002902
2903 return 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00002904}
2905
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002906static int vxlan_newlink(struct net *src_net, struct net_device *dev,
2907 struct nlattr *tb[], struct nlattr *data[])
2908{
2909 struct vxlan_config conf;
2910 int err;
2911
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002912 memset(&conf, 0, sizeof(conf));
Jesse Grosse277de52015-10-16 16:36:00 -07002913
2914 if (data[IFLA_VXLAN_ID])
Jiri Benc54bfd872016-02-16 21:58:58 +01002915 conf.vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002916
2917 if (data[IFLA_VXLAN_GROUP]) {
2918 conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
2919 } else if (data[IFLA_VXLAN_GROUP6]) {
2920 if (!IS_ENABLED(CONFIG_IPV6))
2921 return -EPFNOSUPPORT;
2922
2923 conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
2924 conf.remote_ip.sa.sa_family = AF_INET6;
2925 }
2926
2927 if (data[IFLA_VXLAN_LOCAL]) {
2928 conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
2929 conf.saddr.sa.sa_family = AF_INET;
2930 } else if (data[IFLA_VXLAN_LOCAL6]) {
2931 if (!IS_ENABLED(CONFIG_IPV6))
2932 return -EPFNOSUPPORT;
2933
2934 /* TODO: respect scope id */
2935 conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
2936 conf.saddr.sa.sa_family = AF_INET6;
2937 }
2938
2939 if (data[IFLA_VXLAN_LINK])
2940 conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
2941
2942 if (data[IFLA_VXLAN_TOS])
2943 conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
2944
2945 if (data[IFLA_VXLAN_TTL])
2946 conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
2947
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002948 if (data[IFLA_VXLAN_LABEL])
2949 conf.label = nla_get_be32(data[IFLA_VXLAN_LABEL]) &
2950 IPV6_FLOWLABEL_MASK;
2951
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002952 if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
2953 conf.flags |= VXLAN_F_LEARN;
2954
2955 if (data[IFLA_VXLAN_AGEING])
2956 conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
2957
2958 if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
2959 conf.flags |= VXLAN_F_PROXY;
2960
2961 if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
2962 conf.flags |= VXLAN_F_RSC;
2963
2964 if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
2965 conf.flags |= VXLAN_F_L2MISS;
2966
2967 if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
2968 conf.flags |= VXLAN_F_L3MISS;
2969
2970 if (data[IFLA_VXLAN_LIMIT])
2971 conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
2972
Alexei Starovoitovf8a9b1b2015-07-30 20:10:22 -07002973 if (data[IFLA_VXLAN_COLLECT_METADATA] &&
2974 nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
2975 conf.flags |= VXLAN_F_COLLECT_METADATA;
2976
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002977 if (data[IFLA_VXLAN_PORT_RANGE]) {
2978 const struct ifla_vxlan_port_range *p
2979 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2980 conf.port_min = ntohs(p->low);
2981 conf.port_max = ntohs(p->high);
2982 }
2983
2984 if (data[IFLA_VXLAN_PORT])
2985 conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
2986
Alexander Duyck6ceb31c2016-02-19 11:26:31 -08002987 if (data[IFLA_VXLAN_UDP_CSUM] &&
2988 !nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
2989 conf.flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002990
2991 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
2992 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
2993 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
2994
2995 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
2996 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
2997 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
2998
2999 if (data[IFLA_VXLAN_REMCSUM_TX] &&
3000 nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
3001 conf.flags |= VXLAN_F_REMCSUM_TX;
3002
3003 if (data[IFLA_VXLAN_REMCSUM_RX] &&
3004 nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
3005 conf.flags |= VXLAN_F_REMCSUM_RX;
3006
3007 if (data[IFLA_VXLAN_GBP])
3008 conf.flags |= VXLAN_F_GBP;
3009
Jiri Bence1e53142016-04-05 14:47:13 +02003010 if (data[IFLA_VXLAN_GPE])
3011 conf.flags |= VXLAN_F_GPE;
3012
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003013 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
3014 conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
3015
Chen Haiquance577662016-05-27 10:49:11 +08003016 if (tb[IFLA_MTU])
3017 conf.mtu = nla_get_u32(tb[IFLA_MTU]);
3018
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003019 err = vxlan_dev_configure(src_net, dev, &conf);
3020 switch (err) {
3021 case -ENODEV:
3022 pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
3023 break;
3024
3025 case -EPERM:
3026 pr_info("IPv6 is disabled via sysctl\n");
3027 break;
3028
3029 case -EEXIST:
Jiri Benc54bfd872016-02-16 21:58:58 +01003030 pr_info("duplicate VNI %u\n", be32_to_cpu(conf.vni));
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003031 break;
Jiri Bence1e53142016-04-05 14:47:13 +02003032
3033 case -EINVAL:
3034 pr_info("unsupported combination of extensions\n");
3035 break;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003036 }
3037
3038 return err;
3039}
3040
stephen hemmingerd3428942012-10-01 12:32:35 +00003041static void vxlan_dellink(struct net_device *dev, struct list_head *head)
3042{
3043 struct vxlan_dev *vxlan = netdev_priv(dev);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003044 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
stephen hemmingerd3428942012-10-01 12:32:35 +00003045
stephen hemmingerfe5c3562013-07-13 10:18:18 -07003046 spin_lock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07003047 if (!hlist_unhashed(&vxlan->hlist))
3048 hlist_del_rcu(&vxlan->hlist);
stephen hemmingerfe5c3562013-07-13 10:18:18 -07003049 spin_unlock(&vn->sock_lock);
3050
Tom Herbert58ce31c2015-08-19 17:07:33 -07003051 gro_cells_destroy(&vxlan->gro_cells);
stephen hemminger553675f2013-05-16 11:35:20 +00003052 list_del(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00003053 unregister_netdevice_queue(dev, head);
3054}
3055
3056static size_t vxlan_get_size(const struct net_device *dev)
3057{
3058
3059 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
Cong Wange4c7ed42013-08-31 13:44:33 +08003060 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00003061 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
Cong Wange4c7ed42013-08-31 13:44:33 +08003062 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00003063 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
3064 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01003065 nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */
stephen hemmingerd3428942012-10-01 12:32:35 +00003066 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
David Stevense4f67ad2012-11-20 02:50:14 +00003067 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
3068 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
3069 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
3070 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07003071 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
stephen hemmingerd3428942012-10-01 12:32:35 +00003072 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
3073 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
stephen hemminger05f47d62012-10-09 20:35:50 +00003074 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
Tom Herbert359a0ea2014-06-04 17:20:29 -07003075 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
3076 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
3077 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3078 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
Tom Herbertdfd86452015-01-12 17:00:38 -08003079 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
3080 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
stephen hemmingerd3428942012-10-01 12:32:35 +00003081 0;
3082}
3083
3084static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
3085{
3086 const struct vxlan_dev *vxlan = netdev_priv(dev);
Atzm Watanabec7995c42013-04-16 02:50:52 +00003087 const struct vxlan_rdst *dst = &vxlan->default_dst;
stephen hemminger05f47d62012-10-09 20:35:50 +00003088 struct ifla_vxlan_port_range ports = {
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003089 .low = htons(vxlan->cfg.port_min),
3090 .high = htons(vxlan->cfg.port_max),
stephen hemminger05f47d62012-10-09 20:35:50 +00003091 };
stephen hemmingerd3428942012-10-01 12:32:35 +00003092
Jiri Benc54bfd872016-02-16 21:58:58 +01003093 if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni)))
stephen hemmingerd3428942012-10-01 12:32:35 +00003094 goto nla_put_failure;
3095
Cong Wange4c7ed42013-08-31 13:44:33 +08003096 if (!vxlan_addr_any(&dst->remote_ip)) {
3097 if (dst->remote_ip.sa.sa_family == AF_INET) {
Jiri Benc930345e2015-03-29 16:59:25 +02003098 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
3099 dst->remote_ip.sin.sin_addr.s_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003100 goto nla_put_failure;
3101#if IS_ENABLED(CONFIG_IPV6)
3102 } else {
Jiri Benc930345e2015-03-29 16:59:25 +02003103 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
3104 &dst->remote_ip.sin6.sin6_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003105 goto nla_put_failure;
3106#endif
3107 }
3108 }
stephen hemmingerd3428942012-10-01 12:32:35 +00003109
Atzm Watanabec7995c42013-04-16 02:50:52 +00003110 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
stephen hemmingerd3428942012-10-01 12:32:35 +00003111 goto nla_put_failure;
3112
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003113 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
3114 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
Jiri Benc930345e2015-03-29 16:59:25 +02003115 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003116 vxlan->cfg.saddr.sin.sin_addr.s_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003117 goto nla_put_failure;
3118#if IS_ENABLED(CONFIG_IPV6)
3119 } else {
Jiri Benc930345e2015-03-29 16:59:25 +02003120 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003121 &vxlan->cfg.saddr.sin6.sin6_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003122 goto nla_put_failure;
3123#endif
3124 }
3125 }
stephen hemmingerd3428942012-10-01 12:32:35 +00003126
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003127 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
3128 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01003129 nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) ||
David Stevense4f67ad2012-11-20 02:50:14 +00003130 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
3131 !!(vxlan->flags & VXLAN_F_LEARN)) ||
3132 nla_put_u8(skb, IFLA_VXLAN_PROXY,
3133 !!(vxlan->flags & VXLAN_F_PROXY)) ||
3134 nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) ||
3135 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
3136 !!(vxlan->flags & VXLAN_F_L2MISS)) ||
3137 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
3138 !!(vxlan->flags & VXLAN_F_L3MISS)) ||
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07003139 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
3140 !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) ||
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003141 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
3142 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
3143 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07003144 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
Alexander Duyck6ceb31c2016-02-19 11:26:31 -08003145 !(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM_TX)) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07003146 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
3147 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
3148 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
Tom Herbertdfd86452015-01-12 17:00:38 -08003149 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
3150 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
3151 !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) ||
3152 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
3153 !!(vxlan->flags & VXLAN_F_REMCSUM_RX)))
stephen hemmingerd3428942012-10-01 12:32:35 +00003154 goto nla_put_failure;
3155
stephen hemminger05f47d62012-10-09 20:35:50 +00003156 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
3157 goto nla_put_failure;
3158
Thomas Graf35114942015-01-15 03:53:55 +01003159 if (vxlan->flags & VXLAN_F_GBP &&
3160 nla_put_flag(skb, IFLA_VXLAN_GBP))
3161 goto nla_put_failure;
3162
Jiri Bence1e53142016-04-05 14:47:13 +02003163 if (vxlan->flags & VXLAN_F_GPE &&
3164 nla_put_flag(skb, IFLA_VXLAN_GPE))
3165 goto nla_put_failure;
3166
Tom Herbert0ace2ca2015-02-10 16:30:32 -08003167 if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL &&
3168 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3169 goto nla_put_failure;
3170
stephen hemmingerd3428942012-10-01 12:32:35 +00003171 return 0;
3172
3173nla_put_failure:
3174 return -EMSGSIZE;
3175}
3176
Nicolas Dichtel1728d4f2015-01-15 15:11:17 +01003177static struct net *vxlan_get_link_net(const struct net_device *dev)
3178{
3179 struct vxlan_dev *vxlan = netdev_priv(dev);
3180
3181 return vxlan->net;
3182}
3183
stephen hemmingerd3428942012-10-01 12:32:35 +00003184static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3185 .kind = "vxlan",
3186 .maxtype = IFLA_VXLAN_MAX,
3187 .policy = vxlan_policy,
3188 .priv_size = sizeof(struct vxlan_dev),
3189 .setup = vxlan_setup,
3190 .validate = vxlan_validate,
3191 .newlink = vxlan_newlink,
3192 .dellink = vxlan_dellink,
3193 .get_size = vxlan_get_size,
3194 .fill_info = vxlan_fill_info,
Nicolas Dichtel1728d4f2015-01-15 15:11:17 +01003195 .get_link_net = vxlan_get_link_net,
stephen hemmingerd3428942012-10-01 12:32:35 +00003196};
3197
Nicolas Dichtelcf5da332016-06-13 10:31:05 +02003198struct net_device *vxlan_dev_create(struct net *net, const char *name,
3199 u8 name_assign_type,
3200 struct vxlan_config *conf)
3201{
3202 struct nlattr *tb[IFLA_MAX + 1];
3203 struct net_device *dev;
3204 int err;
3205
3206 memset(&tb, 0, sizeof(tb));
3207
3208 dev = rtnl_create_link(net, name, name_assign_type,
3209 &vxlan_link_ops, tb);
3210 if (IS_ERR(dev))
3211 return dev;
3212
3213 err = vxlan_dev_configure(net, dev, conf);
3214 if (err < 0) {
3215 free_netdev(dev);
3216 return ERR_PTR(err);
3217 }
3218
3219 err = rtnl_configure_link(dev, NULL);
3220 if (err < 0) {
3221 LIST_HEAD(list_kill);
3222
3223 vxlan_dellink(dev, &list_kill);
3224 unregister_netdevice_many(&list_kill);
3225 return ERR_PTR(err);
3226 }
3227
3228 return dev;
3229}
3230EXPORT_SYMBOL_GPL(vxlan_dev_create);
3231
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003232static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3233 struct net_device *dev)
3234{
3235 struct vxlan_dev *vxlan, *next;
3236 LIST_HEAD(list_kill);
3237
3238 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3239 struct vxlan_rdst *dst = &vxlan->default_dst;
3240
3241 /* In case we created vxlan device with carrier
3242 * and we loose the carrier due to module unload
3243 * we also need to remove vxlan device. In other
3244 * cases, it's not necessary and remote_ifindex
3245 * is 0 here, so no matches.
3246 */
3247 if (dst->remote_ifindex == dev->ifindex)
3248 vxlan_dellink(vxlan->dev, &list_kill);
3249 }
3250
3251 unregister_netdevice_many(&list_kill);
3252}
3253
Hannes Frederic Sowab7aade12016-04-18 21:19:47 +02003254static int vxlan_netdevice_event(struct notifier_block *unused,
3255 unsigned long event, void *ptr)
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003256{
3257 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Daniel Borkmann783c1462014-01-22 21:07:53 +01003258 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003259
Daniel Borkmann783c1462014-01-22 21:07:53 +01003260 if (event == NETDEV_UNREGISTER)
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003261 vxlan_handle_lowerdev_unregister(vn, dev);
Alexander Duyck7c46a642016-06-16 12:21:00 -07003262 else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO)
Hannes Frederic Sowab7aade12016-04-18 21:19:47 +02003263 vxlan_push_rx_ports(dev);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003264
3265 return NOTIFY_DONE;
3266}
3267
3268static struct notifier_block vxlan_notifier_block __read_mostly = {
Hannes Frederic Sowab7aade12016-04-18 21:19:47 +02003269 .notifier_call = vxlan_netdevice_event,
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003270};
3271
stephen hemmingerd3428942012-10-01 12:32:35 +00003272static __net_init int vxlan_init_net(struct net *net)
3273{
3274 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Cong Wang31fec5a2013-05-27 22:35:52 +00003275 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00003276
stephen hemminger553675f2013-05-16 11:35:20 +00003277 INIT_LIST_HEAD(&vn->vxlan_list);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07003278 spin_lock_init(&vn->sock_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00003279
stephen hemminger553675f2013-05-16 11:35:20 +00003280 for (h = 0; h < PORT_HASH_SIZE; ++h)
3281 INIT_HLIST_HEAD(&vn->sock_list[h]);
stephen hemmingerd3428942012-10-01 12:32:35 +00003282
3283 return 0;
3284}
3285
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003286static void __net_exit vxlan_exit_net(struct net *net)
3287{
3288 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3289 struct vxlan_dev *vxlan, *next;
3290 struct net_device *dev, *aux;
3291 LIST_HEAD(list);
3292
3293 rtnl_lock();
3294 for_each_netdev_safe(net, dev, aux)
3295 if (dev->rtnl_link_ops == &vxlan_link_ops)
3296 unregister_netdevice_queue(dev, &list);
3297
3298 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3299 /* If vxlan->dev is in the same netns, it has already been added
3300 * to the list by the previous loop.
3301 */
Tom Herbert58ce31c2015-08-19 17:07:33 -07003302 if (!net_eq(dev_net(vxlan->dev), net)) {
3303 gro_cells_destroy(&vxlan->gro_cells);
John W. Linville13c3ed62015-05-18 13:51:24 -04003304 unregister_netdevice_queue(vxlan->dev, &list);
Tom Herbert58ce31c2015-08-19 17:07:33 -07003305 }
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003306 }
3307
3308 unregister_netdevice_many(&list);
3309 rtnl_unlock();
3310}
3311
stephen hemmingerd3428942012-10-01 12:32:35 +00003312static struct pernet_operations vxlan_net_ops = {
3313 .init = vxlan_init_net,
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003314 .exit = vxlan_exit_net,
stephen hemmingerd3428942012-10-01 12:32:35 +00003315 .id = &vxlan_net_id,
3316 .size = sizeof(struct vxlan_net),
3317};
3318
3319static int __init vxlan_init_module(void)
3320{
3321 int rc;
3322
3323 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3324
Daniel Borkmann783c1462014-01-22 21:07:53 +01003325 rc = register_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00003326 if (rc)
3327 goto out1;
3328
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003329 rc = register_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00003330 if (rc)
3331 goto out2;
3332
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003333 rc = rtnl_link_register(&vxlan_link_ops);
3334 if (rc)
3335 goto out3;
stephen hemmingerd3428942012-10-01 12:32:35 +00003336
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003337 return 0;
3338out3:
3339 unregister_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00003340out2:
Daniel Borkmann783c1462014-01-22 21:07:53 +01003341 unregister_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00003342out1:
3343 return rc;
3344}
Cong Wang7332a132013-05-27 22:35:53 +00003345late_initcall(vxlan_init_module);
stephen hemmingerd3428942012-10-01 12:32:35 +00003346
3347static void __exit vxlan_cleanup_module(void)
3348{
Stephen Hemmingerb7153982013-06-17 14:16:09 -07003349 rtnl_link_unregister(&vxlan_link_ops);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003350 unregister_netdevice_notifier(&vxlan_notifier_block);
Daniel Borkmann783c1462014-01-22 21:07:53 +01003351 unregister_pernet_subsys(&vxlan_net_ops);
3352 /* rcu_barrier() is called by netns */
stephen hemmingerd3428942012-10-01 12:32:35 +00003353}
3354module_exit(vxlan_cleanup_module);
3355
3356MODULE_LICENSE("GPL");
3357MODULE_VERSION(VXLAN_VERSION);
stephen hemminger3b8df3c2013-04-27 11:31:52 +00003358MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
Jesse Brandeburgead51392014-01-17 11:00:33 -08003359MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
stephen hemmingerd3428942012-10-01 12:32:35 +00003360MODULE_ALIAS_RTNL_LINK("vxlan");