blob: 54615bb9d91636084bb97026a62f2cc4b84e0d94 [file] [log] [blame]
stephen hemmingerd3428942012-10-01 12:32:35 +00001/*
Rami Roseneb5ce432012-11-13 13:29:15 +00002 * VXLAN: Virtual eXtensible Local Area Network
stephen hemmingerd3428942012-10-01 12:32:35 +00003 *
stephen hemminger3b8df3c2013-04-27 11:31:52 +00004 * Copyright (c) 2012-2013 Vyatta Inc.
stephen hemmingerd3428942012-10-01 12:32:35 +00005 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
stephen hemmingerd3428942012-10-01 12:32:35 +00009 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <linux/kernel.h>
14#include <linux/types.h>
15#include <linux/module.h>
16#include <linux/errno.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/rculist.h>
20#include <linux/netdevice.h>
21#include <linux/in.h>
22#include <linux/ip.h>
23#include <linux/udp.h>
24#include <linux/igmp.h>
25#include <linux/etherdevice.h>
26#include <linux/if_ether.h>
Pravin B Shelar1eaa8172013-08-19 11:23:29 -070027#include <linux/if_vlan.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000028#include <linux/hash.h>
Yan Burman1b13c972013-01-29 23:43:07 +000029#include <linux/ethtool.h>
David Stevense4f67ad2012-11-20 02:50:14 +000030#include <net/arp.h>
31#include <net/ndisc.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000032#include <net/ip.h>
Pravin B Shelarc5441932013-03-25 14:49:35 +000033#include <net/ip_tunnels.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000034#include <net/icmp.h>
35#include <net/udp.h>
Tom Herbert3ee64f32014-07-13 19:49:42 -070036#include <net/udp_tunnel.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000037#include <net/rtnetlink.h>
38#include <net/route.h>
39#include <net/dsfield.h>
40#include <net/inet_ecn.h>
41#include <net/net_namespace.h>
42#include <net/netns/generic.h>
Pravin B Shelar012a5722013-08-19 11:23:07 -070043#include <net/vxlan.h>
Or Gerlitzdc01e7d2014-01-20 13:59:21 +020044#include <net/protocol.h>
Andy Zhouacbf74a2014-09-16 17:31:18 -070045#include <net/udp_tunnel.h>
Cong Wange4c7ed42013-08-31 13:44:33 +080046#if IS_ENABLED(CONFIG_IPV6)
47#include <net/ipv6.h>
48#include <net/addrconf.h>
49#include <net/ip6_tunnel.h>
Cong Wang660d98c2013-09-02 10:06:52 +080050#include <net/ip6_checksum.h>
Cong Wange4c7ed42013-08-31 13:44:33 +080051#endif
Thomas Grafee122c72015-07-21 10:43:58 +020052#include <net/dst_metadata.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000053
54#define VXLAN_VERSION "0.1"
55
stephen hemminger553675f2013-05-16 11:35:20 +000056#define PORT_HASH_BITS 8
57#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
stephen hemmingerd3428942012-10-01 12:32:35 +000058#define FDB_AGE_DEFAULT 300 /* 5 min */
59#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
60
stephen hemminger23c578b2013-04-27 11:31:53 +000061/* UDP port for VXLAN traffic.
62 * The IANA assigned port is 4789, but the Linux default is 8472
Stephen Hemminger234f5b72013-06-17 14:16:41 -070063 * for compatibility with early adopters.
stephen hemminger23c578b2013-04-27 11:31:53 +000064 */
Stephen Hemminger9daaa392013-06-17 14:16:12 -070065static unsigned short vxlan_port __read_mostly = 8472;
66module_param_named(udp_port, vxlan_port, ushort, 0444);
stephen hemmingerd3428942012-10-01 12:32:35 +000067MODULE_PARM_DESC(udp_port, "Destination UDP port");
68
69static bool log_ecn_error = true;
70module_param(log_ecn_error, bool, 0644);
71MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
72
Pravin B Shelar60d9d4c2013-06-20 00:26:31 -070073static int vxlan_net_id;
Thomas Graf0dfbdf42015-07-21 10:44:02 +020074static struct rtnl_link_ops vxlan_link_ops;
stephen hemminger553675f2013-05-16 11:35:20 +000075
Mike Rapoportafbd8ba2013-06-25 16:01:51 +030076static const u8 all_zeros_mac[ETH_ALEN];
77
Thomas Graf614732e2015-07-21 10:44:06 +020078static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
79 bool no_share, u32 flags);
80
stephen hemminger553675f2013-05-16 11:35:20 +000081/* per-network namespace private data for this module */
82struct vxlan_net {
83 struct list_head vxlan_list;
84 struct hlist_head sock_list[PORT_HASH_SIZE];
Stephen Hemminger1c51a912013-06-17 14:16:11 -070085 spinlock_t sock_lock;
stephen hemminger553675f2013-05-16 11:35:20 +000086};
87
stephen hemmingerd3428942012-10-01 12:32:35 +000088/* Forwarding table entry */
89struct vxlan_fdb {
90 struct hlist_node hlist; /* linked list of entries */
91 struct rcu_head rcu;
92 unsigned long updated; /* jiffies */
93 unsigned long used;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -070094 struct list_head remotes;
Sowmini Varadhan7177a3b2015-07-20 09:54:50 +020095 u8 eth_addr[ETH_ALEN];
stephen hemmingerd3428942012-10-01 12:32:35 +000096 u16 state; /* see ndm_state */
David Stevensae884082013-04-19 00:36:26 +000097 u8 flags; /* see ndm_flags */
stephen hemmingerd3428942012-10-01 12:32:35 +000098};
99
stephen hemmingerd3428942012-10-01 12:32:35 +0000100/* salt for hash table */
101static u32 vxlan_salt __read_mostly;
Stephen Hemminger758c57d2013-06-17 14:16:09 -0700102static struct workqueue_struct *vxlan_wq;
stephen hemmingerd3428942012-10-01 12:32:35 +0000103
Thomas Grafee122c72015-07-21 10:43:58 +0200104static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
105{
Thomas Grafe7030872015-07-21 10:44:01 +0200106 return vs->flags & VXLAN_F_COLLECT_METADATA ||
107 ip_tunnel_collect_metadata();
Thomas Grafee122c72015-07-21 10:43:58 +0200108}
109
Cong Wange4c7ed42013-08-31 13:44:33 +0800110#if IS_ENABLED(CONFIG_IPV6)
111static inline
112bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
113{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200114 if (a->sa.sa_family != b->sa.sa_family)
115 return false;
116 if (a->sa.sa_family == AF_INET6)
117 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
118 else
119 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
Cong Wange4c7ed42013-08-31 13:44:33 +0800120}
121
122static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
123{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200124 if (ipa->sa.sa_family == AF_INET6)
125 return ipv6_addr_any(&ipa->sin6.sin6_addr);
126 else
127 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
Cong Wange4c7ed42013-08-31 13:44:33 +0800128}
129
130static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
131{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200132 if (ipa->sa.sa_family == AF_INET6)
133 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
134 else
135 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
Cong Wange4c7ed42013-08-31 13:44:33 +0800136}
137
138static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
139{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200140 if (nla_len(nla) >= sizeof(struct in6_addr)) {
Jiri Benc67b61f62015-03-29 16:59:26 +0200141 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200142 ip->sa.sa_family = AF_INET6;
143 return 0;
144 } else if (nla_len(nla) >= sizeof(__be32)) {
Jiri Benc67b61f62015-03-29 16:59:26 +0200145 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200146 ip->sa.sa_family = AF_INET;
147 return 0;
148 } else {
149 return -EAFNOSUPPORT;
150 }
Cong Wange4c7ed42013-08-31 13:44:33 +0800151}
152
153static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
Jiri Bencf0ef3122015-03-29 16:17:37 +0200154 const union vxlan_addr *ip)
Cong Wange4c7ed42013-08-31 13:44:33 +0800155{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200156 if (ip->sa.sa_family == AF_INET6)
Jiri Benc930345e2015-03-29 16:59:25 +0200157 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200158 else
Jiri Benc930345e2015-03-29 16:59:25 +0200159 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
Cong Wange4c7ed42013-08-31 13:44:33 +0800160}
161
162#else /* !CONFIG_IPV6 */
163
164static inline
165bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
166{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200167 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
Cong Wange4c7ed42013-08-31 13:44:33 +0800168}
169
170static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
171{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200172 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
Cong Wange4c7ed42013-08-31 13:44:33 +0800173}
174
175static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
176{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200177 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
Cong Wange4c7ed42013-08-31 13:44:33 +0800178}
179
180static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
181{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200182 if (nla_len(nla) >= sizeof(struct in6_addr)) {
183 return -EAFNOSUPPORT;
184 } else if (nla_len(nla) >= sizeof(__be32)) {
Jiri Benc67b61f62015-03-29 16:59:26 +0200185 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200186 ip->sa.sa_family = AF_INET;
187 return 0;
188 } else {
189 return -EAFNOSUPPORT;
190 }
Cong Wange4c7ed42013-08-31 13:44:33 +0800191}
192
193static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
Jiri Bencf0ef3122015-03-29 16:17:37 +0200194 const union vxlan_addr *ip)
Cong Wange4c7ed42013-08-31 13:44:33 +0800195{
Jiri Benc930345e2015-03-29 16:59:25 +0200196 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
Cong Wange4c7ed42013-08-31 13:44:33 +0800197}
198#endif
199
stephen hemminger553675f2013-05-16 11:35:20 +0000200/* Virtual Network hash table head */
201static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id)
202{
203 return &vs->vni_list[hash_32(id, VNI_HASH_BITS)];
204}
205
206/* Socket hash table head */
207static inline struct hlist_head *vs_head(struct net *net, __be16 port)
stephen hemmingerd3428942012-10-01 12:32:35 +0000208{
209 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
210
stephen hemminger553675f2013-05-16 11:35:20 +0000211 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
212}
213
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700214/* First remote destination for a forwarding entry.
215 * Guaranteed to be non-NULL because remotes are never deleted.
216 */
stephen hemminger5ca54612013-08-04 17:17:39 -0700217static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700218{
stephen hemminger5ca54612013-08-04 17:17:39 -0700219 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
220}
221
222static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
223{
224 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700225}
226
Thomas Grafac5132d2015-01-15 03:53:56 +0100227/* Find VXLAN socket based on network namespace, address family and UDP port
228 * and enabled unshareable flags.
229 */
230static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
231 __be16 port, u32 flags)
stephen hemminger553675f2013-05-16 11:35:20 +0000232{
233 struct vxlan_sock *vs;
Tom Herbertaf33c1a2015-01-20 11:23:05 -0800234
235 flags &= VXLAN_F_RCV_FLAGS;
stephen hemminger553675f2013-05-16 11:35:20 +0000236
237 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -0200238 if (inet_sk(vs->sock->sk)->inet_sport == port &&
Jiri Benc705cc622015-08-20 13:56:28 +0200239 vxlan_get_sk_family(vs) == family &&
Tom Herbertaf33c1a2015-01-20 11:23:05 -0800240 vs->flags == flags)
stephen hemminger553675f2013-05-16 11:35:20 +0000241 return vs;
242 }
243 return NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +0000244}
245
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700246static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id)
stephen hemmingerd3428942012-10-01 12:32:35 +0000247{
248 struct vxlan_dev *vxlan;
stephen hemmingerd3428942012-10-01 12:32:35 +0000249
stephen hemminger553675f2013-05-16 11:35:20 +0000250 hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) {
Atzm Watanabec7995c42013-04-16 02:50:52 +0000251 if (vxlan->default_dst.remote_vni == id)
stephen hemmingerd3428942012-10-01 12:32:35 +0000252 return vxlan;
253 }
254
255 return NULL;
256}
257
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700258/* Look up VNI in a per net namespace table */
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -0200259static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id,
Thomas Grafac5132d2015-01-15 03:53:56 +0100260 sa_family_t family, __be16 port,
261 u32 flags)
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700262{
263 struct vxlan_sock *vs;
264
Thomas Grafac5132d2015-01-15 03:53:56 +0100265 vs = vxlan_find_sock(net, family, port, flags);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700266 if (!vs)
267 return NULL;
268
269 return vxlan_vs_find_vni(vs, id);
270}
271
stephen hemmingerd3428942012-10-01 12:32:35 +0000272/* Fill in neighbour message in skbuff. */
273static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
Stephen Hemminger234f5b72013-06-17 14:16:41 -0700274 const struct vxlan_fdb *fdb,
275 u32 portid, u32 seq, int type, unsigned int flags,
276 const struct vxlan_rdst *rdst)
stephen hemmingerd3428942012-10-01 12:32:35 +0000277{
278 unsigned long now = jiffies;
279 struct nda_cacheinfo ci;
280 struct nlmsghdr *nlh;
281 struct ndmsg *ndm;
David Stevense4f67ad2012-11-20 02:50:14 +0000282 bool send_ip, send_eth;
stephen hemmingerd3428942012-10-01 12:32:35 +0000283
284 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
285 if (nlh == NULL)
286 return -EMSGSIZE;
287
288 ndm = nlmsg_data(nlh);
289 memset(ndm, 0, sizeof(*ndm));
David Stevense4f67ad2012-11-20 02:50:14 +0000290
291 send_eth = send_ip = true;
292
293 if (type == RTM_GETNEIGH) {
294 ndm->ndm_family = AF_INET;
Cong Wange4c7ed42013-08-31 13:44:33 +0800295 send_ip = !vxlan_addr_any(&rdst->remote_ip);
David Stevense4f67ad2012-11-20 02:50:14 +0000296 send_eth = !is_zero_ether_addr(fdb->eth_addr);
297 } else
298 ndm->ndm_family = AF_BRIDGE;
stephen hemmingerd3428942012-10-01 12:32:35 +0000299 ndm->ndm_state = fdb->state;
300 ndm->ndm_ifindex = vxlan->dev->ifindex;
David Stevensae884082013-04-19 00:36:26 +0000301 ndm->ndm_flags = fdb->flags;
Jun Zhao545469f2014-07-26 00:38:59 +0800302 ndm->ndm_type = RTN_UNICAST;
stephen hemmingerd3428942012-10-01 12:32:35 +0000303
Nicolas Dichtel193523b2015-01-20 15:15:47 +0100304 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
Nicolas Dichtel49670822015-01-26 14:10:53 +0100305 nla_put_s32(skb, NDA_LINK_NETNSID,
Nicolas Dichtel7a0877d2015-05-07 11:02:49 +0200306 peernet2id_alloc(dev_net(vxlan->dev), vxlan->net)))
Nicolas Dichtel193523b2015-01-20 15:15:47 +0100307 goto nla_put_failure;
308
David Stevense4f67ad2012-11-20 02:50:14 +0000309 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
stephen hemmingerd3428942012-10-01 12:32:35 +0000310 goto nla_put_failure;
311
Cong Wange4c7ed42013-08-31 13:44:33 +0800312 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
David Stevens66817122013-03-15 04:35:51 +0000313 goto nla_put_failure;
314
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200315 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
David Stevens66817122013-03-15 04:35:51 +0000316 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
317 goto nla_put_failure;
Atzm Watanabec7995c42013-04-16 02:50:52 +0000318 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
Pravin B Shelar60d9d4c2013-06-20 00:26:31 -0700319 nla_put_u32(skb, NDA_VNI, rdst->remote_vni))
David Stevens66817122013-03-15 04:35:51 +0000320 goto nla_put_failure;
321 if (rdst->remote_ifindex &&
322 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
stephen hemmingerd3428942012-10-01 12:32:35 +0000323 goto nla_put_failure;
324
325 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
326 ci.ndm_confirmed = 0;
327 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
328 ci.ndm_refcnt = 0;
329
330 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
331 goto nla_put_failure;
332
Johannes Berg053c0952015-01-16 22:09:00 +0100333 nlmsg_end(skb, nlh);
334 return 0;
stephen hemmingerd3428942012-10-01 12:32:35 +0000335
336nla_put_failure:
337 nlmsg_cancel(skb, nlh);
338 return -EMSGSIZE;
339}
340
341static inline size_t vxlan_nlmsg_size(void)
342{
343 return NLMSG_ALIGN(sizeof(struct ndmsg))
344 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
Cong Wange4c7ed42013-08-31 13:44:33 +0800345 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
stephen hemminger73cf3312013-04-27 11:31:54 +0000346 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
David Stevens66817122013-03-15 04:35:51 +0000347 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
348 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
Nicolas Dichtel49670822015-01-26 14:10:53 +0100349 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
stephen hemmingerd3428942012-10-01 12:32:35 +0000350 + nla_total_size(sizeof(struct nda_cacheinfo));
351}
352
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200353static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
354 struct vxlan_rdst *rd, int type)
stephen hemmingerd3428942012-10-01 12:32:35 +0000355{
356 struct net *net = dev_net(vxlan->dev);
357 struct sk_buff *skb;
358 int err = -ENOBUFS;
359
360 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
361 if (skb == NULL)
362 goto errout;
363
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200364 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
stephen hemmingerd3428942012-10-01 12:32:35 +0000365 if (err < 0) {
366 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
367 WARN_ON(err == -EMSGSIZE);
368 kfree_skb(skb);
369 goto errout;
370 }
371
372 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
373 return;
374errout:
375 if (err < 0)
376 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
377}
378
Cong Wange4c7ed42013-08-31 13:44:33 +0800379static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
David Stevense4f67ad2012-11-20 02:50:14 +0000380{
381 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700382 struct vxlan_fdb f = {
383 .state = NUD_STALE,
384 };
385 struct vxlan_rdst remote = {
Cong Wange4c7ed42013-08-31 13:44:33 +0800386 .remote_ip = *ipa, /* goes to NDA_DST */
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700387 .remote_vni = VXLAN_N_VID,
388 };
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700389
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200390 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
David Stevense4f67ad2012-11-20 02:50:14 +0000391}
392
393static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
394{
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700395 struct vxlan_fdb f = {
396 .state = NUD_STALE,
397 };
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200398 struct vxlan_rdst remote = { };
David Stevense4f67ad2012-11-20 02:50:14 +0000399
David Stevense4f67ad2012-11-20 02:50:14 +0000400 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
401
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200402 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
David Stevense4f67ad2012-11-20 02:50:14 +0000403}
404
stephen hemmingerd3428942012-10-01 12:32:35 +0000405/* Hash Ethernet address */
406static u32 eth_hash(const unsigned char *addr)
407{
408 u64 value = get_unaligned((u64 *)addr);
409
410 /* only want 6 bytes */
411#ifdef __BIG_ENDIAN
stephen hemmingerd3428942012-10-01 12:32:35 +0000412 value >>= 16;
stephen hemminger321fb992012-10-09 20:35:47 +0000413#else
414 value <<= 16;
stephen hemmingerd3428942012-10-01 12:32:35 +0000415#endif
416 return hash_64(value, FDB_HASH_BITS);
417}
418
419/* Hash chain to use given mac address */
420static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
421 const u8 *mac)
422{
423 return &vxlan->fdb_head[eth_hash(mac)];
424}
425
426/* Look up Ethernet address in forwarding table */
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000427static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
stephen hemmingerd3428942012-10-01 12:32:35 +0000428 const u8 *mac)
stephen hemmingerd3428942012-10-01 12:32:35 +0000429{
430 struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
431 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000432
Sasha Levinb67bfe02013-02-27 17:06:00 -0800433 hlist_for_each_entry_rcu(f, head, hlist) {
Joe Perches7367d0b2013-09-01 11:51:23 -0700434 if (ether_addr_equal(mac, f->eth_addr))
stephen hemmingerd3428942012-10-01 12:32:35 +0000435 return f;
436 }
437
438 return NULL;
439}
440
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000441static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
442 const u8 *mac)
443{
444 struct vxlan_fdb *f;
445
446 f = __vxlan_find_mac(vxlan, mac);
447 if (f)
448 f->used = jiffies;
449
450 return f;
451}
452
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300453/* caller should hold vxlan->hash_lock */
454static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
Cong Wange4c7ed42013-08-31 13:44:33 +0800455 union vxlan_addr *ip, __be16 port,
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300456 __u32 vni, __u32 ifindex)
457{
458 struct vxlan_rdst *rd;
459
460 list_for_each_entry(rd, &f->remotes, list) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800461 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300462 rd->remote_port == port &&
463 rd->remote_vni == vni &&
464 rd->remote_ifindex == ifindex)
465 return rd;
466 }
467
468 return NULL;
469}
470
Thomas Richter906dc182013-07-19 17:20:07 +0200471/* Replace destination of unicast mac */
472static int vxlan_fdb_replace(struct vxlan_fdb *f,
Cong Wange4c7ed42013-08-31 13:44:33 +0800473 union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex)
Thomas Richter906dc182013-07-19 17:20:07 +0200474{
475 struct vxlan_rdst *rd;
476
477 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
478 if (rd)
479 return 0;
480
481 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
482 if (!rd)
483 return 0;
Cong Wange4c7ed42013-08-31 13:44:33 +0800484 rd->remote_ip = *ip;
Thomas Richter906dc182013-07-19 17:20:07 +0200485 rd->remote_port = port;
486 rd->remote_vni = vni;
487 rd->remote_ifindex = ifindex;
488 return 1;
489}
490
David Stevens66817122013-03-15 04:35:51 +0000491/* Add/update destinations for multicast */
492static int vxlan_fdb_append(struct vxlan_fdb *f,
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200493 union vxlan_addr *ip, __be16 port, __u32 vni,
494 __u32 ifindex, struct vxlan_rdst **rdp)
David Stevens66817122013-03-15 04:35:51 +0000495{
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700496 struct vxlan_rdst *rd;
David Stevens66817122013-03-15 04:35:51 +0000497
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300498 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
499 if (rd)
500 return 0;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700501
David Stevens66817122013-03-15 04:35:51 +0000502 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
503 if (rd == NULL)
504 return -ENOBUFS;
Cong Wange4c7ed42013-08-31 13:44:33 +0800505 rd->remote_ip = *ip;
David Stevens66817122013-03-15 04:35:51 +0000506 rd->remote_port = port;
507 rd->remote_vni = vni;
508 rd->remote_ifindex = ifindex;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700509
510 list_add_tail_rcu(&rd->list, &f->remotes);
511
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200512 *rdp = rd;
David Stevens66817122013-03-15 04:35:51 +0000513 return 1;
514}
515
Tom Herbertdfd86452015-01-12 17:00:38 -0800516static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
517 unsigned int off,
518 struct vxlanhdr *vh, size_t hdrlen,
Tom Herbert0ace2ca2015-02-10 16:30:32 -0800519 u32 data, struct gro_remcsum *grc,
520 bool nopartial)
Tom Herbertdfd86452015-01-12 17:00:38 -0800521{
522 size_t start, offset, plen;
Tom Herbertdfd86452015-01-12 17:00:38 -0800523
524 if (skb->remcsum_offload)
Tom Herbert26c4f7d2015-02-10 16:30:27 -0800525 return NULL;
Tom Herbertdfd86452015-01-12 17:00:38 -0800526
527 if (!NAPI_GRO_CB(skb)->csum_valid)
528 return NULL;
529
530 start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
531 offset = start + ((data & VXLAN_RCO_UDP) ?
532 offsetof(struct udphdr, check) :
533 offsetof(struct tcphdr, check));
534
535 plen = hdrlen + offset + sizeof(u16);
536
537 /* Pull checksum that will be written */
538 if (skb_gro_header_hard(skb, off + plen)) {
539 vh = skb_gro_header_slow(skb, off + plen, off);
540 if (!vh)
541 return NULL;
542 }
543
Tom Herbert26c4f7d2015-02-10 16:30:27 -0800544 skb_gro_remcsum_process(skb, (void *)vh + hdrlen,
Tom Herbert0ace2ca2015-02-10 16:30:32 -0800545 start, offset, grc, nopartial);
Tom Herbertdfd86452015-01-12 17:00:38 -0800546
547 skb->remcsum_offload = 1;
548
549 return vh;
550}
551
Tom Herberta2b12f32015-01-12 17:00:37 -0800552static struct sk_buff **vxlan_gro_receive(struct sk_buff **head,
553 struct sk_buff *skb,
554 struct udp_offload *uoff)
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200555{
556 struct sk_buff *p, **pp = NULL;
557 struct vxlanhdr *vh, *vh2;
Jesse Gross9b174d82014-12-30 19:10:15 -0800558 unsigned int hlen, off_vx;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200559 int flush = 1;
Tom Herbertdfd86452015-01-12 17:00:38 -0800560 struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock,
561 udp_offloads);
562 u32 flags;
Tom Herbert26c4f7d2015-02-10 16:30:27 -0800563 struct gro_remcsum grc;
564
565 skb_gro_remcsum_init(&grc);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200566
567 off_vx = skb_gro_offset(skb);
568 hlen = off_vx + sizeof(*vh);
569 vh = skb_gro_header_fast(skb, off_vx);
570 if (skb_gro_header_hard(skb, hlen)) {
571 vh = skb_gro_header_slow(skb, hlen, off_vx);
572 if (unlikely(!vh))
573 goto out;
574 }
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200575
Tom Herbertdfd86452015-01-12 17:00:38 -0800576 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
577 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
578
579 flags = ntohl(vh->vx_flags);
580
581 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
582 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
Tom Herbert0ace2ca2015-02-10 16:30:32 -0800583 ntohl(vh->vx_vni), &grc,
584 !!(vs->flags &
585 VXLAN_F_REMCSUM_NOPARTIAL));
Tom Herbertdfd86452015-01-12 17:00:38 -0800586
587 if (!vh)
588 goto out;
589 }
590
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200591 flush = 0;
592
593 for (p = *head; p; p = p->next) {
594 if (!NAPI_GRO_CB(p)->same_flow)
595 continue;
596
597 vh2 = (struct vxlanhdr *)(p->data + off_vx);
Thomas Graf35114942015-01-15 03:53:55 +0100598 if (vh->vx_flags != vh2->vx_flags ||
599 vh->vx_vni != vh2->vx_vni) {
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200600 NAPI_GRO_CB(p)->same_flow = 0;
601 continue;
602 }
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200603 }
604
Jesse Gross9b174d82014-12-30 19:10:15 -0800605 pp = eth_gro_receive(head, skb);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200606
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200607out:
Tom Herbert26c4f7d2015-02-10 16:30:27 -0800608 skb_gro_remcsum_cleanup(skb, &grc);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200609 NAPI_GRO_CB(skb)->flush |= flush;
610
611 return pp;
612}
613
Tom Herberta2b12f32015-01-12 17:00:37 -0800614static int vxlan_gro_complete(struct sk_buff *skb, int nhoff,
615 struct udp_offload *uoff)
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200616{
Jesse Grosscfdf1e12014-11-10 11:45:13 -0800617 udp_tunnel_gro_complete(skb, nhoff);
618
Jesse Gross9b174d82014-12-30 19:10:15 -0800619 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200620}
621
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700622/* Notify netdevs that UDP port started listening */
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200623static void vxlan_notify_add_rx_port(struct vxlan_sock *vs)
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700624{
625 struct net_device *dev;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200626 struct sock *sk = vs->sock->sk;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700627 struct net *net = sock_net(sk);
Jiri Benc705cc622015-08-20 13:56:28 +0200628 sa_family_t sa_family = vxlan_get_sk_family(vs);
Joseph Gasparakis35e42372013-09-13 07:34:13 -0700629 __be16 port = inet_sk(sk)->inet_sport;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200630 int err;
631
632 if (sa_family == AF_INET) {
633 err = udp_add_offload(&vs->udp_offloads);
634 if (err)
635 pr_warn("vxlan: udp_add_offload failed with status %d\n", err);
636 }
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700637
638 rcu_read_lock();
639 for_each_netdev_rcu(net, dev) {
640 if (dev->netdev_ops->ndo_add_vxlan_port)
641 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
642 port);
643 }
644 rcu_read_unlock();
645}
646
647/* Notify netdevs that UDP port is no more listening */
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200648static void vxlan_notify_del_rx_port(struct vxlan_sock *vs)
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700649{
650 struct net_device *dev;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200651 struct sock *sk = vs->sock->sk;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700652 struct net *net = sock_net(sk);
Jiri Benc705cc622015-08-20 13:56:28 +0200653 sa_family_t sa_family = vxlan_get_sk_family(vs);
Joseph Gasparakis35e42372013-09-13 07:34:13 -0700654 __be16 port = inet_sk(sk)->inet_sport;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700655
656 rcu_read_lock();
657 for_each_netdev_rcu(net, dev) {
658 if (dev->netdev_ops->ndo_del_vxlan_port)
659 dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family,
660 port);
661 }
662 rcu_read_unlock();
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200663
664 if (sa_family == AF_INET)
665 udp_del_offload(&vs->udp_offloads);
Joseph Gasparakis53cf52752013-09-04 02:13:38 -0700666}
667
stephen hemmingerd3428942012-10-01 12:32:35 +0000668/* Add new entry to forwarding table -- assumes lock held */
669static int vxlan_fdb_create(struct vxlan_dev *vxlan,
Cong Wange4c7ed42013-08-31 13:44:33 +0800670 const u8 *mac, union vxlan_addr *ip,
David Stevens66817122013-03-15 04:35:51 +0000671 __u16 state, __u16 flags,
stephen hemminger73cf3312013-04-27 11:31:54 +0000672 __be16 port, __u32 vni, __u32 ifindex,
David Stevensae884082013-04-19 00:36:26 +0000673 __u8 ndm_flags)
stephen hemmingerd3428942012-10-01 12:32:35 +0000674{
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200675 struct vxlan_rdst *rd = NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +0000676 struct vxlan_fdb *f;
677 int notify = 0;
678
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000679 f = __vxlan_find_mac(vxlan, mac);
stephen hemmingerd3428942012-10-01 12:32:35 +0000680 if (f) {
681 if (flags & NLM_F_EXCL) {
682 netdev_dbg(vxlan->dev,
683 "lost race to create %pM\n", mac);
684 return -EEXIST;
685 }
686 if (f->state != state) {
687 f->state = state;
688 f->updated = jiffies;
689 notify = 1;
690 }
David Stevensae884082013-04-19 00:36:26 +0000691 if (f->flags != ndm_flags) {
692 f->flags = ndm_flags;
693 f->updated = jiffies;
694 notify = 1;
695 }
Thomas Richter906dc182013-07-19 17:20:07 +0200696 if ((flags & NLM_F_REPLACE)) {
697 /* Only change unicasts */
698 if (!(is_multicast_ether_addr(f->eth_addr) ||
699 is_zero_ether_addr(f->eth_addr))) {
Li RongQing60840422015-04-22 15:49:10 +0800700 notify |= vxlan_fdb_replace(f, ip, port, vni,
Thomas Richter906dc182013-07-19 17:20:07 +0200701 ifindex);
Thomas Richter906dc182013-07-19 17:20:07 +0200702 } else
703 return -EOPNOTSUPP;
704 }
David Stevens66817122013-03-15 04:35:51 +0000705 if ((flags & NLM_F_APPEND) &&
Mike Rapoport58e4c762013-06-25 16:01:56 +0300706 (is_multicast_ether_addr(f->eth_addr) ||
707 is_zero_ether_addr(f->eth_addr))) {
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200708 int rc = vxlan_fdb_append(f, ip, port, vni, ifindex,
709 &rd);
David Stevens66817122013-03-15 04:35:51 +0000710
711 if (rc < 0)
712 return rc;
713 notify |= rc;
714 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000715 } else {
716 if (!(flags & NLM_F_CREATE))
717 return -ENOENT;
718
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200719 if (vxlan->cfg.addrmax &&
720 vxlan->addrcnt >= vxlan->cfg.addrmax)
stephen hemmingerd3428942012-10-01 12:32:35 +0000721 return -ENOSPC;
722
Thomas Richter906dc182013-07-19 17:20:07 +0200723 /* Disallow replace to add a multicast entry */
724 if ((flags & NLM_F_REPLACE) &&
725 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
726 return -EOPNOTSUPP;
727
Cong Wange4c7ed42013-08-31 13:44:33 +0800728 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
stephen hemmingerd3428942012-10-01 12:32:35 +0000729 f = kmalloc(sizeof(*f), GFP_ATOMIC);
730 if (!f)
731 return -ENOMEM;
732
733 notify = 1;
stephen hemmingerd3428942012-10-01 12:32:35 +0000734 f->state = state;
David Stevensae884082013-04-19 00:36:26 +0000735 f->flags = ndm_flags;
stephen hemmingerd3428942012-10-01 12:32:35 +0000736 f->updated = f->used = jiffies;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700737 INIT_LIST_HEAD(&f->remotes);
stephen hemmingerd3428942012-10-01 12:32:35 +0000738 memcpy(f->eth_addr, mac, ETH_ALEN);
739
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200740 vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700741
stephen hemmingerd3428942012-10-01 12:32:35 +0000742 ++vxlan->addrcnt;
743 hlist_add_head_rcu(&f->hlist,
744 vxlan_fdb_head(vxlan, mac));
745 }
746
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200747 if (notify) {
748 if (rd == NULL)
749 rd = first_remote_rtnl(f);
750 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
751 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000752
753 return 0;
754}
755
Wei Yongjun6706c822013-04-11 19:00:35 +0000756static void vxlan_fdb_free(struct rcu_head *head)
David Stevens66817122013-03-15 04:35:51 +0000757{
758 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700759 struct vxlan_rdst *rd, *nd;
David Stevens66817122013-03-15 04:35:51 +0000760
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700761 list_for_each_entry_safe(rd, nd, &f->remotes, list)
David Stevens66817122013-03-15 04:35:51 +0000762 kfree(rd);
David Stevens66817122013-03-15 04:35:51 +0000763 kfree(f);
764}
765
stephen hemmingerd3428942012-10-01 12:32:35 +0000766static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
767{
768 netdev_dbg(vxlan->dev,
769 "delete %pM\n", f->eth_addr);
770
771 --vxlan->addrcnt;
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200772 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
stephen hemmingerd3428942012-10-01 12:32:35 +0000773
774 hlist_del_rcu(&f->hlist);
David Stevens66817122013-03-15 04:35:51 +0000775 call_rcu(&f->rcu, vxlan_fdb_free);
stephen hemmingerd3428942012-10-01 12:32:35 +0000776}
777
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300778static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
Cong Wange4c7ed42013-08-31 13:44:33 +0800779 union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex)
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300780{
781 struct net *net = dev_net(vxlan->dev);
Cong Wange4c7ed42013-08-31 13:44:33 +0800782 int err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300783
784 if (tb[NDA_DST]) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800785 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
786 if (err)
787 return err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300788 } else {
Cong Wange4c7ed42013-08-31 13:44:33 +0800789 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
790 if (remote->sa.sa_family == AF_INET) {
791 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
792 ip->sa.sa_family = AF_INET;
793#if IS_ENABLED(CONFIG_IPV6)
794 } else {
795 ip->sin6.sin6_addr = in6addr_any;
796 ip->sa.sa_family = AF_INET6;
797#endif
798 }
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300799 }
800
801 if (tb[NDA_PORT]) {
802 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
803 return -EINVAL;
804 *port = nla_get_be16(tb[NDA_PORT]);
805 } else {
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200806 *port = vxlan->cfg.dst_port;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300807 }
808
809 if (tb[NDA_VNI]) {
810 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
811 return -EINVAL;
812 *vni = nla_get_u32(tb[NDA_VNI]);
813 } else {
814 *vni = vxlan->default_dst.remote_vni;
815 }
816
817 if (tb[NDA_IFINDEX]) {
818 struct net_device *tdev;
819
820 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
821 return -EINVAL;
822 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
Ying Xue73763942014-01-15 10:23:41 +0800823 tdev = __dev_get_by_index(net, *ifindex);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300824 if (!tdev)
825 return -EADDRNOTAVAIL;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300826 } else {
827 *ifindex = 0;
828 }
829
830 return 0;
831}
832
stephen hemmingerd3428942012-10-01 12:32:35 +0000833/* Add static entry (via netlink) */
834static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
835 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100836 const unsigned char *addr, u16 vid, u16 flags)
stephen hemmingerd3428942012-10-01 12:32:35 +0000837{
838 struct vxlan_dev *vxlan = netdev_priv(dev);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300839 /* struct net *net = dev_net(vxlan->dev); */
Cong Wange4c7ed42013-08-31 13:44:33 +0800840 union vxlan_addr ip;
stephen hemminger73cf3312013-04-27 11:31:54 +0000841 __be16 port;
842 u32 vni, ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +0000843 int err;
844
845 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
846 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
847 ndm->ndm_state);
848 return -EINVAL;
849 }
850
851 if (tb[NDA_DST] == NULL)
852 return -EINVAL;
853
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300854 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
855 if (err)
856 return err;
David Stevens66817122013-03-15 04:35:51 +0000857
Mike Rapoport5933a7b2014-04-01 09:23:01 +0300858 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
859 return -EAFNOSUPPORT;
860
stephen hemmingerd3428942012-10-01 12:32:35 +0000861 spin_lock_bh(&vxlan->hash_lock);
Cong Wange4c7ed42013-08-31 13:44:33 +0800862 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
stephen hemminger73cf3312013-04-27 11:31:54 +0000863 port, vni, ifindex, ndm->ndm_flags);
stephen hemmingerd3428942012-10-01 12:32:35 +0000864 spin_unlock_bh(&vxlan->hash_lock);
865
866 return err;
867}
868
869/* Delete entry (via netlink) */
Vlad Yasevich1690be62013-02-13 12:00:18 +0000870static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
871 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100872 const unsigned char *addr, u16 vid)
stephen hemmingerd3428942012-10-01 12:32:35 +0000873{
874 struct vxlan_dev *vxlan = netdev_priv(dev);
875 struct vxlan_fdb *f;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300876 struct vxlan_rdst *rd = NULL;
Cong Wange4c7ed42013-08-31 13:44:33 +0800877 union vxlan_addr ip;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300878 __be16 port;
879 u32 vni, ifindex;
880 int err;
881
882 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
883 if (err)
884 return err;
885
886 err = -ENOENT;
stephen hemmingerd3428942012-10-01 12:32:35 +0000887
888 spin_lock_bh(&vxlan->hash_lock);
889 f = vxlan_find_mac(vxlan, addr);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300890 if (!f)
891 goto out;
892
Cong Wange4c7ed42013-08-31 13:44:33 +0800893 if (!vxlan_addr_any(&ip)) {
894 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300895 if (!rd)
896 goto out;
stephen hemmingerd3428942012-10-01 12:32:35 +0000897 }
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300898
899 err = 0;
900
901 /* remove a destination if it's not the only one on the list,
902 * otherwise destroy the fdb entry
903 */
904 if (rd && !list_is_singular(&f->remotes)) {
905 list_del_rcu(&rd->list);
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200906 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
Wei Yongjundcdc7a52013-08-17 07:32:09 +0800907 kfree_rcu(rd, rcu);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300908 goto out;
909 }
910
911 vxlan_fdb_destroy(vxlan, f);
912
913out:
stephen hemmingerd3428942012-10-01 12:32:35 +0000914 spin_unlock_bh(&vxlan->hash_lock);
915
916 return err;
917}
918
919/* Dump forwarding table */
920static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
Jamal Hadi Salim5d5eacb2014-07-10 07:01:58 -0400921 struct net_device *dev,
922 struct net_device *filter_dev, int idx)
stephen hemmingerd3428942012-10-01 12:32:35 +0000923{
924 struct vxlan_dev *vxlan = netdev_priv(dev);
925 unsigned int h;
926
927 for (h = 0; h < FDB_HASH_SIZE; ++h) {
928 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000929 int err;
930
Sasha Levinb67bfe02013-02-27 17:06:00 -0800931 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
David Stevens66817122013-03-15 04:35:51 +0000932 struct vxlan_rdst *rd;
stephen hemmingerd3428942012-10-01 12:32:35 +0000933
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700934 list_for_each_entry_rcu(rd, &f->remotes, list) {
Atzm Watanabe07a51cd2015-08-10 23:39:09 +0900935 if (idx < cb->args[0])
936 goto skip;
937
David Stevens66817122013-03-15 04:35:51 +0000938 err = vxlan_fdb_info(skb, vxlan, f,
939 NETLINK_CB(cb->skb).portid,
940 cb->nlh->nlmsg_seq,
941 RTM_NEWNEIGH,
942 NLM_F_MULTI, rd);
943 if (err < 0)
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700944 goto out;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700945skip:
Atzm Watanabe07a51cd2015-08-10 23:39:09 +0900946 ++idx;
947 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000948 }
949 }
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700950out:
stephen hemmingerd3428942012-10-01 12:32:35 +0000951 return idx;
952}
953
954/* Watch incoming packets to learn mapping between Ethernet address
955 * and Tunnel endpoint.
Simon Hormanc4b49512015-04-02 11:17:58 +0900956 * Return true if packet is bogus and should be dropped.
stephen hemmingerd3428942012-10-01 12:32:35 +0000957 */
stephen hemminger26a41ae62013-06-17 12:09:58 -0700958static bool vxlan_snoop(struct net_device *dev,
Cong Wange4c7ed42013-08-31 13:44:33 +0800959 union vxlan_addr *src_ip, const u8 *src_mac)
stephen hemmingerd3428942012-10-01 12:32:35 +0000960{
961 struct vxlan_dev *vxlan = netdev_priv(dev);
962 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000963
964 f = vxlan_find_mac(vxlan, src_mac);
965 if (likely(f)) {
stephen hemminger5ca54612013-08-04 17:17:39 -0700966 struct vxlan_rdst *rdst = first_remote_rcu(f);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700967
Cong Wange4c7ed42013-08-31 13:44:33 +0800968 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip)))
stephen hemminger26a41ae62013-06-17 12:09:58 -0700969 return false;
970
971 /* Don't migrate static entries, drop packets */
stephen hemmingereb064c32013-06-18 14:27:01 -0700972 if (f->state & NUD_NOARP)
stephen hemminger26a41ae62013-06-17 12:09:58 -0700973 return true;
stephen hemmingerd3428942012-10-01 12:32:35 +0000974
975 if (net_ratelimit())
976 netdev_info(dev,
Cong Wange4c7ed42013-08-31 13:44:33 +0800977 "%pM migrated from %pIS to %pIS\n",
Rasmus Villemoesa4870f72015-02-07 03:17:31 +0100978 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
stephen hemmingerd3428942012-10-01 12:32:35 +0000979
Cong Wange4c7ed42013-08-31 13:44:33 +0800980 rdst->remote_ip = *src_ip;
stephen hemmingerd3428942012-10-01 12:32:35 +0000981 f->updated = jiffies;
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200982 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
stephen hemmingerd3428942012-10-01 12:32:35 +0000983 } else {
984 /* learned new entry */
985 spin_lock(&vxlan->hash_lock);
stephen hemminger3bf74b12013-06-17 12:09:57 -0700986
987 /* close off race between vxlan_flush and incoming packets */
988 if (netif_running(dev))
989 vxlan_fdb_create(vxlan, src_mac, src_ip,
990 NUD_REACHABLE,
991 NLM_F_EXCL|NLM_F_CREATE,
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200992 vxlan->cfg.dst_port,
stephen hemminger3bf74b12013-06-17 12:09:57 -0700993 vxlan->default_dst.remote_vni,
994 0, NTF_SELF);
stephen hemmingerd3428942012-10-01 12:32:35 +0000995 spin_unlock(&vxlan->hash_lock);
996 }
stephen hemminger26a41ae62013-06-17 12:09:58 -0700997
998 return false;
stephen hemmingerd3428942012-10-01 12:32:35 +0000999}
1000
stephen hemmingerd3428942012-10-01 12:32:35 +00001001/* See if multicast group is already in use by other ID */
Gao feng95ab0992013-12-10 16:37:33 +08001002static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
stephen hemmingerd3428942012-10-01 12:32:35 +00001003{
stephen hemminger553675f2013-05-16 11:35:20 +00001004 struct vxlan_dev *vxlan;
stephen hemmingerd3428942012-10-01 12:32:35 +00001005
Gao feng95ab0992013-12-10 16:37:33 +08001006 /* The vxlan_sock is only used by dev, leaving group has
1007 * no effect on other vxlan devices.
1008 */
1009 if (atomic_read(&dev->vn_sock->refcnt) == 1)
1010 return false;
1011
stephen hemminger553675f2013-05-16 11:35:20 +00001012 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
Gao feng95ab0992013-12-10 16:37:33 +08001013 if (!netif_running(vxlan->dev) || vxlan == dev)
stephen hemminger553675f2013-05-16 11:35:20 +00001014 continue;
stephen hemmingerd3428942012-10-01 12:32:35 +00001015
Gao feng95ab0992013-12-10 16:37:33 +08001016 if (vxlan->vn_sock != dev->vn_sock)
1017 continue;
1018
1019 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1020 &dev->default_dst.remote_ip))
1021 continue;
1022
1023 if (vxlan->default_dst.remote_ifindex !=
1024 dev->default_dst.remote_ifindex)
1025 continue;
1026
1027 return true;
stephen hemminger553675f2013-05-16 11:35:20 +00001028 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001029
1030 return false;
1031}
1032
Thomas Graf614732e2015-07-21 10:44:06 +02001033static void vxlan_sock_release(struct vxlan_sock *vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001034{
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07001035 struct sock *sk = vs->sock->sk;
1036 struct net *net = sock_net(sk);
1037 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Pravin B Shelar012a5722013-08-19 11:23:07 -07001038
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001039 if (!atomic_dec_and_test(&vs->refcnt))
1040 return;
1041
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001042 spin_lock(&vn->sock_lock);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001043 hlist_del_rcu(&vs->hlist);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02001044 vxlan_notify_del_rx_port(vs);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001045 spin_unlock(&vn->sock_lock);
1046
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001047 queue_work(vxlan_wq, &vs->del_work);
1048}
1049
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001050/* Update multicast group membership when first VNI on
Simon Hormanc4b49512015-04-02 11:17:58 +09001051 * multicast address is brought up
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001052 */
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001053static int vxlan_igmp_join(struct vxlan_dev *vxlan)
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001054{
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001055 struct vxlan_sock *vs = vxlan->vn_sock;
1056 struct sock *sk = vs->sock->sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001057 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1058 int ifindex = vxlan->default_dst.remote_ifindex;
Marcelo Ricardo Leitner149d7542015-03-20 10:26:21 -03001059 int ret = -EINVAL;
stephen hemmingerd3428942012-10-01 12:32:35 +00001060
stephen hemmingerd3428942012-10-01 12:32:35 +00001061 lock_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001062 if (ip->sa.sa_family == AF_INET) {
1063 struct ip_mreqn mreq = {
1064 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1065 .imr_ifindex = ifindex,
1066 };
1067
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001068 ret = ip_mc_join_group(sk, &mreq);
Cong Wange4c7ed42013-08-31 13:44:33 +08001069#if IS_ENABLED(CONFIG_IPV6)
1070 } else {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001071 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1072 &ip->sin6.sin6_addr);
Cong Wange4c7ed42013-08-31 13:44:33 +08001073#endif
1074 }
stephen hemminger3fc2de22013-07-18 08:40:15 -07001075 release_sock(sk);
1076
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001077 return ret;
stephen hemminger3fc2de22013-07-18 08:40:15 -07001078}
1079
1080/* Inverse of vxlan_igmp_join when last VNI is brought down */
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001081static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
stephen hemminger3fc2de22013-07-18 08:40:15 -07001082{
stephen hemminger3fc2de22013-07-18 08:40:15 -07001083 struct vxlan_sock *vs = vxlan->vn_sock;
1084 struct sock *sk = vs->sock->sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001085 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1086 int ifindex = vxlan->default_dst.remote_ifindex;
Marcelo Ricardo Leitner149d7542015-03-20 10:26:21 -03001087 int ret = -EINVAL;
stephen hemminger3fc2de22013-07-18 08:40:15 -07001088
1089 lock_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001090 if (ip->sa.sa_family == AF_INET) {
1091 struct ip_mreqn mreq = {
1092 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1093 .imr_ifindex = ifindex,
1094 };
1095
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001096 ret = ip_mc_leave_group(sk, &mreq);
Cong Wange4c7ed42013-08-31 13:44:33 +08001097#if IS_ENABLED(CONFIG_IPV6)
1098 } else {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001099 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1100 &ip->sin6.sin6_addr);
Cong Wange4c7ed42013-08-31 13:44:33 +08001101#endif
1102 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001103 release_sock(sk);
stephen hemmingerd3428942012-10-01 12:32:35 +00001104
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001105 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00001106}
1107
Tom Herbertdfd86452015-01-12 17:00:38 -08001108static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh,
Tom Herbert0ace2ca2015-02-10 16:30:32 -08001109 size_t hdrlen, u32 data, bool nopartial)
Tom Herbertdfd86452015-01-12 17:00:38 -08001110{
1111 size_t start, offset, plen;
Tom Herbertdfd86452015-01-12 17:00:38 -08001112
Tom Herbertdfd86452015-01-12 17:00:38 -08001113 start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
1114 offset = start + ((data & VXLAN_RCO_UDP) ?
1115 offsetof(struct udphdr, check) :
1116 offsetof(struct tcphdr, check));
1117
1118 plen = hdrlen + offset + sizeof(u16);
1119
1120 if (!pskb_may_pull(skb, plen))
1121 return NULL;
1122
1123 vh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
1124
Tom Herbert0ace2ca2015-02-10 16:30:32 -08001125 skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset,
1126 nopartial);
Tom Herbertdfd86452015-01-12 17:00:38 -08001127
1128 return vh;
1129}
1130
Thomas Graf614732e2015-07-21 10:44:06 +02001131static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb,
1132 struct vxlan_metadata *md, u32 vni,
1133 struct metadata_dst *tun_dst)
1134{
1135 struct iphdr *oip = NULL;
1136 struct ipv6hdr *oip6 = NULL;
1137 struct vxlan_dev *vxlan;
1138 struct pcpu_sw_netstats *stats;
1139 union vxlan_addr saddr;
1140 int err = 0;
1141 union vxlan_addr *remote_ip;
1142
1143 /* For flow based devices, map all packets to VNI 0 */
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07001144 if (vs->flags & VXLAN_F_COLLECT_METADATA)
Thomas Graf614732e2015-07-21 10:44:06 +02001145 vni = 0;
1146
1147 /* Is this VNI defined? */
1148 vxlan = vxlan_vs_find_vni(vs, vni);
1149 if (!vxlan)
1150 goto drop;
1151
1152 remote_ip = &vxlan->default_dst.remote_ip;
1153 skb_reset_mac_header(skb);
1154 skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev)));
1155 skb->protocol = eth_type_trans(skb, vxlan->dev);
1156 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1157
1158 /* Ignore packet loops (and multicast echo) */
1159 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
1160 goto drop;
1161
1162 /* Re-examine inner Ethernet packet */
1163 if (remote_ip->sa.sa_family == AF_INET) {
1164 oip = ip_hdr(skb);
1165 saddr.sin.sin_addr.s_addr = oip->saddr;
1166 saddr.sa.sa_family = AF_INET;
1167#if IS_ENABLED(CONFIG_IPV6)
1168 } else {
1169 oip6 = ipv6_hdr(skb);
1170 saddr.sin6.sin6_addr = oip6->saddr;
1171 saddr.sa.sa_family = AF_INET6;
1172#endif
1173 }
1174
1175 if (tun_dst) {
1176 skb_dst_set(skb, (struct dst_entry *)tun_dst);
1177 tun_dst = NULL;
1178 }
1179
1180 if ((vxlan->flags & VXLAN_F_LEARN) &&
1181 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source))
1182 goto drop;
1183
1184 skb_reset_network_header(skb);
1185 /* In flow-based mode, GBP is carried in dst_metadata */
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07001186 if (!(vs->flags & VXLAN_F_COLLECT_METADATA))
Thomas Graf614732e2015-07-21 10:44:06 +02001187 skb->mark = md->gbp;
1188
1189 if (oip6)
1190 err = IP6_ECN_decapsulate(oip6, skb);
1191 if (oip)
1192 err = IP_ECN_decapsulate(oip, skb);
1193
1194 if (unlikely(err)) {
1195 if (log_ecn_error) {
1196 if (oip6)
1197 net_info_ratelimited("non-ECT from %pI6\n",
1198 &oip6->saddr);
1199 if (oip)
1200 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1201 &oip->saddr, oip->tos);
1202 }
1203 if (err > 1) {
1204 ++vxlan->dev->stats.rx_frame_errors;
1205 ++vxlan->dev->stats.rx_errors;
1206 goto drop;
1207 }
1208 }
1209
1210 stats = this_cpu_ptr(vxlan->dev->tstats);
1211 u64_stats_update_begin(&stats->syncp);
1212 stats->rx_packets++;
1213 stats->rx_bytes += skb->len;
1214 u64_stats_update_end(&stats->syncp);
1215
1216 netif_rx(skb);
1217
1218 return;
1219drop:
1220 if (tun_dst)
1221 dst_release((struct dst_entry *)tun_dst);
1222
1223 /* Consume bad packet */
1224 kfree_skb(skb);
1225}
1226
stephen hemmingerd3428942012-10-01 12:32:35 +00001227/* Callback from net/ipv4/udp.c to receive packets */
1228static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
1229{
Thomas Grafee122c72015-07-21 10:43:58 +02001230 struct metadata_dst *tun_dst = NULL;
1231 struct ip_tunnel_info *info;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001232 struct vxlan_sock *vs;
stephen hemmingerd3428942012-10-01 12:32:35 +00001233 struct vxlanhdr *vxh;
Tom Herbert3bf39472015-01-08 12:31:18 -08001234 u32 flags, vni;
Thomas Grafee122c72015-07-21 10:43:58 +02001235 struct vxlan_metadata _md;
1236 struct vxlan_metadata *md = &_md;
stephen hemmingerd3428942012-10-01 12:32:35 +00001237
stephen hemmingerd3428942012-10-01 12:32:35 +00001238 /* Need Vxlan and inner Ethernet header to be present */
Pravin B Shelar7ce04752013-08-19 11:22:54 -07001239 if (!pskb_may_pull(skb, VXLAN_HLEN))
stephen hemmingerd3428942012-10-01 12:32:35 +00001240 goto error;
1241
Pravin B Shelar7ce04752013-08-19 11:22:54 -07001242 vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
Tom Herbert3bf39472015-01-08 12:31:18 -08001243 flags = ntohl(vxh->vx_flags);
1244 vni = ntohl(vxh->vx_vni);
1245
1246 if (flags & VXLAN_HF_VNI) {
1247 flags &= ~VXLAN_HF_VNI;
1248 } else {
1249 /* VNI flag always required to be set */
1250 goto bad_flags;
stephen hemmingerd3428942012-10-01 12:32:35 +00001251 }
1252
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001253 if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB)))
stephen hemmingerd3428942012-10-01 12:32:35 +00001254 goto drop;
Tom Herbertdfd86452015-01-12 17:00:38 -08001255 vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
stephen hemmingerd3428942012-10-01 12:32:35 +00001256
Pravin B Shelar559835ea2013-09-24 10:25:40 -07001257 vs = rcu_dereference_sk_user_data(sk);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001258 if (!vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001259 goto drop;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001260
Tom Herbertdfd86452015-01-12 17:00:38 -08001261 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
Tom Herbert0ace2ca2015-02-10 16:30:32 -08001262 vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni,
1263 !!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL));
Tom Herbertdfd86452015-01-12 17:00:38 -08001264 if (!vxh)
1265 goto drop;
1266
1267 flags &= ~VXLAN_HF_RCO;
Alexey Kodanev40fb70f2015-03-13 19:13:53 +03001268 vni &= VXLAN_VNI_MASK;
Tom Herbertdfd86452015-01-12 17:00:38 -08001269 }
1270
Thomas Grafee122c72015-07-21 10:43:58 +02001271 if (vxlan_collect_metadata(vs)) {
Thomas Grafee122c72015-07-21 10:43:58 +02001272 tun_dst = metadata_dst_alloc(sizeof(*md), GFP_ATOMIC);
1273 if (!tun_dst)
1274 goto drop;
1275
1276 info = &tun_dst->u.tun_info;
Jiri Benca725e512015-08-20 13:56:30 +02001277 if (vxlan_get_sk_family(vs) == AF_INET) {
1278 const struct iphdr *iph = ip_hdr(skb);
1279
1280 info->key.u.ipv4.src = iph->saddr;
1281 info->key.u.ipv4.dst = iph->daddr;
1282 info->key.tos = iph->tos;
1283 info->key.ttl = iph->ttl;
1284 } else {
1285 const struct ipv6hdr *ip6h = ipv6_hdr(skb);
1286
1287 info->key.u.ipv6.src = ip6h->saddr;
1288 info->key.u.ipv6.dst = ip6h->daddr;
1289 info->key.tos = ipv6_get_dsfield(ip6h);
1290 info->key.ttl = ip6h->hop_limit;
1291 }
1292
Thomas Grafee122c72015-07-21 10:43:58 +02001293 info->key.tp_src = udp_hdr(skb)->source;
1294 info->key.tp_dst = udp_hdr(skb)->dest;
1295
1296 info->mode = IP_TUNNEL_INFO_RX;
1297 info->key.tun_flags = TUNNEL_KEY;
1298 info->key.tun_id = cpu_to_be64(vni >> 8);
1299 if (udp_hdr(skb)->check != 0)
1300 info->key.tun_flags |= TUNNEL_CSUM;
1301
1302 md = ip_tunnel_info_opts(info, sizeof(*md));
Thomas Grafee122c72015-07-21 10:43:58 +02001303 } else {
1304 memset(md, 0, sizeof(*md));
1305 }
1306
Thomas Graf35114942015-01-15 03:53:55 +01001307 /* For backwards compatibility, only allow reserved fields to be
1308 * used by VXLAN extensions if explicitly requested.
1309 */
1310 if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) {
1311 struct vxlanhdr_gbp *gbp;
1312
1313 gbp = (struct vxlanhdr_gbp *)vxh;
Thomas Grafee122c72015-07-21 10:43:58 +02001314 md->gbp = ntohs(gbp->policy_id);
1315
1316 if (tun_dst)
1317 info->key.tun_flags |= TUNNEL_VXLAN_OPT;
Thomas Graf35114942015-01-15 03:53:55 +01001318
1319 if (gbp->dont_learn)
Thomas Grafee122c72015-07-21 10:43:58 +02001320 md->gbp |= VXLAN_GBP_DONT_LEARN;
Thomas Graf35114942015-01-15 03:53:55 +01001321
1322 if (gbp->policy_applied)
Thomas Grafee122c72015-07-21 10:43:58 +02001323 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
Thomas Graf35114942015-01-15 03:53:55 +01001324
1325 flags &= ~VXLAN_GBP_USED_BITS;
1326 }
1327
Alexey Kodanev40fb70f2015-03-13 19:13:53 +03001328 if (flags || vni & ~VXLAN_VNI_MASK) {
Tom Herbert3bf39472015-01-08 12:31:18 -08001329 /* If there are any unprocessed flags remaining treat
1330 * this as a malformed packet. This behavior diverges from
1331 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1332 * in reserved fields are to be ignored. The approach here
Simon Hormanc4b49512015-04-02 11:17:58 +09001333 * maintains compatibility with previous stack code, and also
Tom Herbert3bf39472015-01-08 12:31:18 -08001334 * is more robust and provides a little more security in
1335 * adding extensions to VXLAN.
1336 */
1337
1338 goto bad_flags;
1339 }
1340
Thomas Graf614732e2015-07-21 10:44:06 +02001341 vxlan_rcv(vs, skb, md, vni >> 8, tun_dst);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001342 return 0;
1343
1344drop:
1345 /* Consume bad packet */
1346 kfree_skb(skb);
1347 return 0;
1348
Tom Herbert3bf39472015-01-08 12:31:18 -08001349bad_flags:
1350 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1351 ntohl(vxh->vx_flags), ntohl(vxh->vx_vni));
1352
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001353error:
Thomas Grafee122c72015-07-21 10:43:58 +02001354 if (tun_dst)
1355 dst_release((struct dst_entry *)tun_dst);
1356
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001357 /* Return non vxlan pkt */
1358 return 1;
1359}
1360
David Stevense4f67ad2012-11-20 02:50:14 +00001361static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
1362{
1363 struct vxlan_dev *vxlan = netdev_priv(dev);
1364 struct arphdr *parp;
1365 u8 *arpptr, *sha;
1366 __be32 sip, tip;
1367 struct neighbour *n;
1368
1369 if (dev->flags & IFF_NOARP)
1370 goto out;
1371
1372 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1373 dev->stats.tx_dropped++;
1374 goto out;
1375 }
1376 parp = arp_hdr(skb);
1377
1378 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1379 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1380 parp->ar_pro != htons(ETH_P_IP) ||
1381 parp->ar_op != htons(ARPOP_REQUEST) ||
1382 parp->ar_hln != dev->addr_len ||
1383 parp->ar_pln != 4)
1384 goto out;
1385 arpptr = (u8 *)parp + sizeof(struct arphdr);
1386 sha = arpptr;
1387 arpptr += dev->addr_len; /* sha */
1388 memcpy(&sip, arpptr, sizeof(sip));
1389 arpptr += sizeof(sip);
1390 arpptr += dev->addr_len; /* tha */
1391 memcpy(&tip, arpptr, sizeof(tip));
1392
1393 if (ipv4_is_loopback(tip) ||
1394 ipv4_is_multicast(tip))
1395 goto out;
1396
1397 n = neigh_lookup(&arp_tbl, &tip, dev);
1398
1399 if (n) {
David Stevense4f67ad2012-11-20 02:50:14 +00001400 struct vxlan_fdb *f;
1401 struct sk_buff *reply;
1402
1403 if (!(n->nud_state & NUD_CONNECTED)) {
1404 neigh_release(n);
1405 goto out;
1406 }
1407
1408 f = vxlan_find_mac(vxlan, n->ha);
Cong Wange4c7ed42013-08-31 13:44:33 +08001409 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
David Stevense4f67ad2012-11-20 02:50:14 +00001410 /* bridge-local neighbor */
1411 neigh_release(n);
1412 goto out;
1413 }
1414
1415 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1416 n->ha, sha);
1417
1418 neigh_release(n);
1419
David Stevens73461352014-03-18 12:32:29 -04001420 if (reply == NULL)
1421 goto out;
1422
David Stevense4f67ad2012-11-20 02:50:14 +00001423 skb_reset_mac_header(reply);
1424 __skb_pull(reply, skb_network_offset(reply));
1425 reply->ip_summed = CHECKSUM_UNNECESSARY;
1426 reply->pkt_type = PACKET_HOST;
1427
1428 if (netif_rx_ni(reply) == NET_RX_DROP)
1429 dev->stats.rx_dropped++;
Cong Wange4c7ed42013-08-31 13:44:33 +08001430 } else if (vxlan->flags & VXLAN_F_L3MISS) {
1431 union vxlan_addr ipa = {
1432 .sin.sin_addr.s_addr = tip,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001433 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001434 };
1435
1436 vxlan_ip_miss(dev, &ipa);
1437 }
David Stevense4f67ad2012-11-20 02:50:14 +00001438out:
1439 consume_skb(skb);
1440 return NETDEV_TX_OK;
1441}
1442
Cong Wangf564f452013-08-31 13:44:36 +08001443#if IS_ENABLED(CONFIG_IPV6)
David Stevens4b29dba2014-03-24 10:39:58 -04001444static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1445 struct neighbour *n, bool isrouter)
1446{
1447 struct net_device *dev = request->dev;
1448 struct sk_buff *reply;
1449 struct nd_msg *ns, *na;
1450 struct ipv6hdr *pip6;
1451 u8 *daddr;
1452 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1453 int ns_olen;
1454 int i, len;
1455
1456 if (dev == NULL)
1457 return NULL;
1458
1459 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1460 sizeof(*na) + na_olen + dev->needed_tailroom;
1461 reply = alloc_skb(len, GFP_ATOMIC);
1462 if (reply == NULL)
1463 return NULL;
1464
1465 reply->protocol = htons(ETH_P_IPV6);
1466 reply->dev = dev;
1467 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1468 skb_push(reply, sizeof(struct ethhdr));
1469 skb_set_mac_header(reply, 0);
1470
1471 ns = (struct nd_msg *)skb_transport_header(request);
1472
1473 daddr = eth_hdr(request)->h_source;
1474 ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns);
1475 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1476 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1477 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1478 break;
1479 }
1480 }
1481
1482 /* Ethernet header */
1483 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1484 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1485 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1486 reply->protocol = htons(ETH_P_IPV6);
1487
1488 skb_pull(reply, sizeof(struct ethhdr));
1489 skb_set_network_header(reply, 0);
1490 skb_put(reply, sizeof(struct ipv6hdr));
1491
1492 /* IPv6 header */
1493
1494 pip6 = ipv6_hdr(reply);
1495 memset(pip6, 0, sizeof(struct ipv6hdr));
1496 pip6->version = 6;
1497 pip6->priority = ipv6_hdr(request)->priority;
1498 pip6->nexthdr = IPPROTO_ICMPV6;
1499 pip6->hop_limit = 255;
1500 pip6->daddr = ipv6_hdr(request)->saddr;
1501 pip6->saddr = *(struct in6_addr *)n->primary_key;
1502
1503 skb_pull(reply, sizeof(struct ipv6hdr));
1504 skb_set_transport_header(reply, 0);
1505
1506 na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen);
1507
1508 /* Neighbor Advertisement */
1509 memset(na, 0, sizeof(*na)+na_olen);
1510 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1511 na->icmph.icmp6_router = isrouter;
1512 na->icmph.icmp6_override = 1;
1513 na->icmph.icmp6_solicited = 1;
1514 na->target = ns->target;
1515 ether_addr_copy(&na->opt[2], n->ha);
1516 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1517 na->opt[1] = na_olen >> 3;
1518
1519 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1520 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1521 csum_partial(na, sizeof(*na)+na_olen, 0));
1522
1523 pip6->payload_len = htons(sizeof(*na)+na_olen);
1524
1525 skb_push(reply, sizeof(struct ipv6hdr));
1526
1527 reply->ip_summed = CHECKSUM_UNNECESSARY;
1528
1529 return reply;
1530}
1531
Cong Wangf564f452013-08-31 13:44:36 +08001532static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
1533{
1534 struct vxlan_dev *vxlan = netdev_priv(dev);
David Stevens4b29dba2014-03-24 10:39:58 -04001535 struct nd_msg *msg;
Cong Wangf564f452013-08-31 13:44:36 +08001536 const struct ipv6hdr *iphdr;
1537 const struct in6_addr *saddr, *daddr;
David Stevens4b29dba2014-03-24 10:39:58 -04001538 struct neighbour *n;
1539 struct inet6_dev *in6_dev;
Cong Wangf564f452013-08-31 13:44:36 +08001540
1541 in6_dev = __in6_dev_get(dev);
1542 if (!in6_dev)
1543 goto out;
1544
Cong Wangf564f452013-08-31 13:44:36 +08001545 iphdr = ipv6_hdr(skb);
1546 saddr = &iphdr->saddr;
1547 daddr = &iphdr->daddr;
1548
Cong Wangf564f452013-08-31 13:44:36 +08001549 msg = (struct nd_msg *)skb_transport_header(skb);
1550 if (msg->icmph.icmp6_code != 0 ||
1551 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1552 goto out;
1553
David Stevens4b29dba2014-03-24 10:39:58 -04001554 if (ipv6_addr_loopback(daddr) ||
1555 ipv6_addr_is_multicast(&msg->target))
1556 goto out;
1557
1558 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
Cong Wangf564f452013-08-31 13:44:36 +08001559
1560 if (n) {
1561 struct vxlan_fdb *f;
David Stevens4b29dba2014-03-24 10:39:58 -04001562 struct sk_buff *reply;
Cong Wangf564f452013-08-31 13:44:36 +08001563
1564 if (!(n->nud_state & NUD_CONNECTED)) {
1565 neigh_release(n);
1566 goto out;
1567 }
1568
1569 f = vxlan_find_mac(vxlan, n->ha);
1570 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1571 /* bridge-local neighbor */
1572 neigh_release(n);
1573 goto out;
1574 }
1575
David Stevens4b29dba2014-03-24 10:39:58 -04001576 reply = vxlan_na_create(skb, n,
1577 !!(f ? f->flags & NTF_ROUTER : 0));
1578
Cong Wangf564f452013-08-31 13:44:36 +08001579 neigh_release(n);
David Stevens4b29dba2014-03-24 10:39:58 -04001580
1581 if (reply == NULL)
1582 goto out;
1583
1584 if (netif_rx_ni(reply) == NET_RX_DROP)
1585 dev->stats.rx_dropped++;
1586
Cong Wangf564f452013-08-31 13:44:36 +08001587 } else if (vxlan->flags & VXLAN_F_L3MISS) {
David Stevens4b29dba2014-03-24 10:39:58 -04001588 union vxlan_addr ipa = {
1589 .sin6.sin6_addr = msg->target,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001590 .sin6.sin6_family = AF_INET6,
David Stevens4b29dba2014-03-24 10:39:58 -04001591 };
1592
Cong Wangf564f452013-08-31 13:44:36 +08001593 vxlan_ip_miss(dev, &ipa);
1594 }
1595
1596out:
1597 consume_skb(skb);
1598 return NETDEV_TX_OK;
1599}
1600#endif
1601
David Stevense4f67ad2012-11-20 02:50:14 +00001602static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1603{
1604 struct vxlan_dev *vxlan = netdev_priv(dev);
1605 struct neighbour *n;
David Stevense4f67ad2012-11-20 02:50:14 +00001606
1607 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1608 return false;
1609
1610 n = NULL;
1611 switch (ntohs(eth_hdr(skb)->h_proto)) {
1612 case ETH_P_IP:
Cong Wange15a00a2013-08-31 13:44:34 +08001613 {
1614 struct iphdr *pip;
1615
David Stevense4f67ad2012-11-20 02:50:14 +00001616 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1617 return false;
1618 pip = ip_hdr(skb);
1619 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
Cong Wange4c7ed42013-08-31 13:44:33 +08001620 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1621 union vxlan_addr ipa = {
1622 .sin.sin_addr.s_addr = pip->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001623 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001624 };
1625
1626 vxlan_ip_miss(dev, &ipa);
1627 return false;
1628 }
1629
David Stevense4f67ad2012-11-20 02:50:14 +00001630 break;
Cong Wange15a00a2013-08-31 13:44:34 +08001631 }
1632#if IS_ENABLED(CONFIG_IPV6)
1633 case ETH_P_IPV6:
1634 {
1635 struct ipv6hdr *pip6;
1636
1637 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1638 return false;
1639 pip6 = ipv6_hdr(skb);
1640 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
1641 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1642 union vxlan_addr ipa = {
1643 .sin6.sin6_addr = pip6->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001644 .sin6.sin6_family = AF_INET6,
Cong Wange15a00a2013-08-31 13:44:34 +08001645 };
1646
1647 vxlan_ip_miss(dev, &ipa);
1648 return false;
1649 }
1650
1651 break;
1652 }
1653#endif
David Stevense4f67ad2012-11-20 02:50:14 +00001654 default:
1655 return false;
1656 }
1657
1658 if (n) {
1659 bool diff;
1660
Joe Perches7367d0b2013-09-01 11:51:23 -07001661 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
David Stevense4f67ad2012-11-20 02:50:14 +00001662 if (diff) {
1663 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1664 dev->addr_len);
1665 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1666 }
1667 neigh_release(n);
1668 return diff;
Cong Wange4c7ed42013-08-31 13:44:33 +08001669 }
1670
David Stevense4f67ad2012-11-20 02:50:14 +00001671 return false;
1672}
1673
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001674static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
Thomas Graf35114942015-01-15 03:53:55 +01001675 struct vxlan_metadata *md)
1676{
1677 struct vxlanhdr_gbp *gbp;
1678
Thomas Grafdb79a622015-02-04 17:00:04 +01001679 if (!md->gbp)
1680 return;
1681
Thomas Graf35114942015-01-15 03:53:55 +01001682 gbp = (struct vxlanhdr_gbp *)vxh;
1683 vxh->vx_flags |= htonl(VXLAN_HF_GBP);
1684
1685 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1686 gbp->dont_learn = 1;
1687
1688 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1689 gbp->policy_applied = 1;
1690
1691 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1692}
1693
Cong Wange4c7ed42013-08-31 13:44:33 +08001694#if IS_ENABLED(CONFIG_IPV6)
David Miller79b16aa2015-04-05 22:19:09 -04001695static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk,
1696 struct sk_buff *skb,
Cong Wange4c7ed42013-08-31 13:44:33 +08001697 struct net_device *dev, struct in6_addr *saddr,
1698 struct in6_addr *daddr, __u8 prio, __u8 ttl,
Thomas Graf6b6948d2015-07-22 17:08:42 +02001699 __be16 src_port, __be16 dst_port, __be32 vni,
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001700 struct vxlan_metadata *md, bool xnet, u32 vxflags)
Cong Wange4c7ed42013-08-31 13:44:33 +08001701{
Cong Wange4c7ed42013-08-31 13:44:33 +08001702 struct vxlanhdr *vxh;
Cong Wange4c7ed42013-08-31 13:44:33 +08001703 int min_headroom;
1704 int err;
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001705 bool udp_sum = !(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX);
Tom Herbertdfd86452015-01-12 17:00:38 -08001706 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
1707 u16 hdrlen = sizeof(struct vxlanhdr);
Cong Wange4c7ed42013-08-31 13:44:33 +08001708
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001709 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
Tom Herbertdfd86452015-01-12 17:00:38 -08001710 skb->ip_summed == CHECKSUM_PARTIAL) {
1711 int csum_start = skb_checksum_start_offset(skb);
1712
1713 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1714 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1715 (skb->csum_offset == offsetof(struct udphdr, check) ||
1716 skb->csum_offset == offsetof(struct tcphdr, check))) {
1717 udp_sum = false;
1718 type |= SKB_GSO_TUNNEL_REMCSUM;
1719 }
1720 }
1721
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02001722 skb_scrub_packet(skb, xnet);
Nicolas Dichtel963a88b2013-09-02 15:34:57 +02001723
Cong Wange4c7ed42013-08-31 13:44:33 +08001724 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
1725 + VXLAN_HLEN + sizeof(struct ipv6hdr)
Jiri Pirkodf8a39d2015-01-13 17:13:44 +01001726 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
Cong Wange4c7ed42013-08-31 13:44:33 +08001727
1728 /* Need space for new headers (invalidates iph ptr) */
1729 err = skb_cow_head(skb, min_headroom);
Pravin B Shelar74f47272014-12-23 16:20:36 -08001730 if (unlikely(err)) {
1731 kfree_skb(skb);
1732 goto err;
1733 }
Cong Wange4c7ed42013-08-31 13:44:33 +08001734
Jiri Pirko59682502014-11-19 14:04:59 +01001735 skb = vlan_hwaccel_push_inside(skb);
Pravin B Shelar74f47272014-12-23 16:20:36 -08001736 if (WARN_ON(!skb)) {
1737 err = -ENOMEM;
1738 goto err;
1739 }
Cong Wange4c7ed42013-08-31 13:44:33 +08001740
Jesse Grossb736a622015-04-09 11:19:14 -07001741 skb = iptunnel_handle_offloads(skb, udp_sum, type);
1742 if (IS_ERR(skb)) {
1743 err = -EINVAL;
1744 goto err;
1745 }
1746
Cong Wange4c7ed42013-08-31 13:44:33 +08001747 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
Tom Herbert3bf39472015-01-08 12:31:18 -08001748 vxh->vx_flags = htonl(VXLAN_HF_VNI);
Thomas Graf614732e2015-07-21 10:44:06 +02001749 vxh->vx_vni = vni;
Cong Wange4c7ed42013-08-31 13:44:33 +08001750
Tom Herbertdfd86452015-01-12 17:00:38 -08001751 if (type & SKB_GSO_TUNNEL_REMCSUM) {
1752 u32 data = (skb_checksum_start_offset(skb) - hdrlen) >>
1753 VXLAN_RCO_SHIFT;
1754
1755 if (skb->csum_offset == offsetof(struct udphdr, check))
1756 data |= VXLAN_RCO_UDP;
1757
1758 vxh->vx_vni |= htonl(data);
1759 vxh->vx_flags |= htonl(VXLAN_HF_RCO);
1760
1761 if (!skb_is_gso(skb)) {
1762 skb->ip_summed = CHECKSUM_NONE;
1763 skb->encapsulation = 0;
1764 }
1765 }
1766
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001767 if (vxflags & VXLAN_F_GBP)
1768 vxlan_build_gbp_hdr(vxh, vxflags, md);
Thomas Graf35114942015-01-15 03:53:55 +01001769
Tom Herbert996c9fd2014-09-29 20:22:33 -07001770 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1771
David Miller79b16aa2015-04-05 22:19:09 -04001772 udp_tunnel6_xmit_skb(dst, sk, skb, dev, saddr, daddr, prio,
Tom Herbertd998f8e2015-01-20 11:23:04 -08001773 ttl, src_port, dst_port,
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001774 !!(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX));
Cong Wange4c7ed42013-08-31 13:44:33 +08001775 return 0;
Pravin B Shelar74f47272014-12-23 16:20:36 -08001776err:
1777 dst_release(dst);
1778 return err;
Cong Wange4c7ed42013-08-31 13:44:33 +08001779}
1780#endif
1781
Thomas Graf614732e2015-07-21 10:44:06 +02001782static int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
1783 __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
Thomas Graf6b6948d2015-07-22 17:08:42 +02001784 __be16 src_port, __be16 dst_port, __be32 vni,
Thomas Graf614732e2015-07-21 10:44:06 +02001785 struct vxlan_metadata *md, bool xnet, u32 vxflags)
Pravin B Shelar49560532013-08-19 11:23:17 -07001786{
1787 struct vxlanhdr *vxh;
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001788 int min_headroom;
Pravin B Shelar49560532013-08-19 11:23:17 -07001789 int err;
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001790 bool udp_sum = !!(vxflags & VXLAN_F_UDP_CSUM);
Tom Herbertdfd86452015-01-12 17:00:38 -08001791 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
1792 u16 hdrlen = sizeof(struct vxlanhdr);
Pravin B Shelar49560532013-08-19 11:23:17 -07001793
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001794 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
Tom Herbertdfd86452015-01-12 17:00:38 -08001795 skb->ip_summed == CHECKSUM_PARTIAL) {
1796 int csum_start = skb_checksum_start_offset(skb);
1797
1798 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1799 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1800 (skb->csum_offset == offsetof(struct udphdr, check) ||
1801 skb->csum_offset == offsetof(struct tcphdr, check))) {
1802 udp_sum = false;
1803 type |= SKB_GSO_TUNNEL_REMCSUM;
1804 }
1805 }
1806
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001807 min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07001808 + VXLAN_HLEN + sizeof(struct iphdr)
Jiri Pirkodf8a39d2015-01-13 17:13:44 +01001809 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001810
1811 /* Need space for new headers (invalidates iph ptr) */
1812 err = skb_cow_head(skb, min_headroom);
Pravin B Shelar74f47272014-12-23 16:20:36 -08001813 if (unlikely(err)) {
1814 kfree_skb(skb);
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001815 return err;
Pravin B Shelar74f47272014-12-23 16:20:36 -08001816 }
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001817
Jiri Pirko59682502014-11-19 14:04:59 +01001818 skb = vlan_hwaccel_push_inside(skb);
1819 if (WARN_ON(!skb))
1820 return -ENOMEM;
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07001821
Jesse Grossb736a622015-04-09 11:19:14 -07001822 skb = iptunnel_handle_offloads(skb, udp_sum, type);
1823 if (IS_ERR(skb))
1824 return PTR_ERR(skb);
1825
Pravin B Shelar49560532013-08-19 11:23:17 -07001826 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
Tom Herbert3bf39472015-01-08 12:31:18 -08001827 vxh->vx_flags = htonl(VXLAN_HF_VNI);
Thomas Graf614732e2015-07-21 10:44:06 +02001828 vxh->vx_vni = vni;
Pravin B Shelar49560532013-08-19 11:23:17 -07001829
Tom Herbertdfd86452015-01-12 17:00:38 -08001830 if (type & SKB_GSO_TUNNEL_REMCSUM) {
1831 u32 data = (skb_checksum_start_offset(skb) - hdrlen) >>
1832 VXLAN_RCO_SHIFT;
1833
1834 if (skb->csum_offset == offsetof(struct udphdr, check))
1835 data |= VXLAN_RCO_UDP;
1836
1837 vxh->vx_vni |= htonl(data);
1838 vxh->vx_flags |= htonl(VXLAN_HF_RCO);
1839
1840 if (!skb_is_gso(skb)) {
1841 skb->ip_summed = CHECKSUM_NONE;
1842 skb->encapsulation = 0;
1843 }
1844 }
1845
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001846 if (vxflags & VXLAN_F_GBP)
1847 vxlan_build_gbp_hdr(vxh, vxflags, md);
Thomas Graf35114942015-01-15 03:53:55 +01001848
Tom Herbert996c9fd2014-09-29 20:22:33 -07001849 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1850
David Miller79b16aa2015-04-05 22:19:09 -04001851 return udp_tunnel_xmit_skb(rt, sk, skb, src, dst, tos,
Tom Herbertd998f8e2015-01-20 11:23:04 -08001852 ttl, df, src_port, dst_port, xnet,
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001853 !(vxflags & VXLAN_F_UDP_CSUM));
Pravin B Shelar49560532013-08-19 11:23:17 -07001854}
Pravin B Shelar49560532013-08-19 11:23:17 -07001855
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001856/* Bypass encapsulation if the destination is local */
1857static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
1858 struct vxlan_dev *dst_vxlan)
1859{
Li RongQing8f849852014-01-04 13:57:59 +08001860 struct pcpu_sw_netstats *tx_stats, *rx_stats;
Cong Wange4c7ed42013-08-31 13:44:33 +08001861 union vxlan_addr loopback;
1862 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
Li RongQingce6502a2014-10-16 08:49:41 +08001863 struct net_device *dev = skb->dev;
1864 int len = skb->len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001865
Li RongQing8f849852014-01-04 13:57:59 +08001866 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
1867 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001868 skb->pkt_type = PACKET_HOST;
1869 skb->encapsulation = 0;
1870 skb->dev = dst_vxlan->dev;
1871 __skb_pull(skb, skb_network_offset(skb));
1872
Cong Wange4c7ed42013-08-31 13:44:33 +08001873 if (remote_ip->sa.sa_family == AF_INET) {
1874 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1875 loopback.sa.sa_family = AF_INET;
1876#if IS_ENABLED(CONFIG_IPV6)
1877 } else {
1878 loopback.sin6.sin6_addr = in6addr_loopback;
1879 loopback.sa.sa_family = AF_INET6;
1880#endif
1881 }
1882
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001883 if (dst_vxlan->flags & VXLAN_F_LEARN)
Cong Wange4c7ed42013-08-31 13:44:33 +08001884 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001885
1886 u64_stats_update_begin(&tx_stats->syncp);
1887 tx_stats->tx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08001888 tx_stats->tx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001889 u64_stats_update_end(&tx_stats->syncp);
1890
1891 if (netif_rx(skb) == NET_RX_SUCCESS) {
1892 u64_stats_update_begin(&rx_stats->syncp);
1893 rx_stats->rx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08001894 rx_stats->rx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001895 u64_stats_update_end(&rx_stats->syncp);
1896 } else {
Li RongQingce6502a2014-10-16 08:49:41 +08001897 dev->stats.rx_dropped++;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001898 }
1899}
1900
Stephen Hemminger4ad16932013-06-17 14:16:11 -07001901static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
1902 struct vxlan_rdst *rdst, bool did_rsc)
stephen hemmingerd3428942012-10-01 12:32:35 +00001903{
Thomas Graf3093fbe2015-07-21 10:44:00 +02001904 struct ip_tunnel_info *info;
stephen hemmingerd3428942012-10-01 12:32:35 +00001905 struct vxlan_dev *vxlan = netdev_priv(dev);
David Miller79b16aa2015-04-05 22:19:09 -04001906 struct sock *sk = vxlan->vn_sock->sock->sk;
Jiri Benca725e512015-08-20 13:56:30 +02001907 unsigned short family = vxlan_get_sk_family(vxlan->vn_sock);
Cong Wange4c7ed42013-08-31 13:44:33 +08001908 struct rtable *rt = NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +00001909 const struct iphdr *old_iph;
stephen hemmingerd3428942012-10-01 12:32:35 +00001910 struct flowi4 fl4;
Cong Wange4c7ed42013-08-31 13:44:33 +08001911 union vxlan_addr *dst;
Thomas Grafee122c72015-07-21 10:43:58 +02001912 union vxlan_addr remote_ip;
1913 struct vxlan_metadata _md;
1914 struct vxlan_metadata *md = &_md;
Cong Wange4c7ed42013-08-31 13:44:33 +08001915 __be16 src_port = 0, dst_port;
Stephen Hemminger234f5b72013-06-17 14:16:41 -07001916 u32 vni;
stephen hemmingerd3428942012-10-01 12:32:35 +00001917 __be16 df = 0;
1918 __u8 tos, ttl;
Pravin B Shelar0e6fbc52013-06-17 17:49:56 -07001919 int err;
Thomas Grafee122c72015-07-21 10:43:58 +02001920 u32 flags = vxlan->flags;
stephen hemmingerd3428942012-10-01 12:32:35 +00001921
Jiri Benc61adedf2015-08-20 13:56:25 +02001922 info = skb_tunnel_info(skb);
Thomas Graf3093fbe2015-07-21 10:44:00 +02001923
Thomas Grafee122c72015-07-21 10:43:58 +02001924 if (rdst) {
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001925 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
Thomas Grafee122c72015-07-21 10:43:58 +02001926 vni = rdst->remote_vni;
1927 dst = &rdst->remote_ip;
1928 } else {
1929 if (!info) {
1930 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1931 dev->name);
1932 goto drop;
1933 }
1934
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001935 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
Thomas Grafee122c72015-07-21 10:43:58 +02001936 vni = be64_to_cpu(info->key.tun_id);
Jiri Benca725e512015-08-20 13:56:30 +02001937 remote_ip.sa.sa_family = family;
1938 if (family == AF_INET)
1939 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
1940 else
1941 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
Thomas Grafee122c72015-07-21 10:43:58 +02001942 dst = &remote_ip;
1943 }
David Stevense4f67ad2012-11-20 02:50:14 +00001944
Cong Wange4c7ed42013-08-31 13:44:33 +08001945 if (vxlan_addr_any(dst)) {
David Stevense4f67ad2012-11-20 02:50:14 +00001946 if (did_rsc) {
David Stevense4f67ad2012-11-20 02:50:14 +00001947 /* short-circuited back to local bridge */
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001948 vxlan_encap_bypass(skb, vxlan, vxlan);
Stephen Hemminger4ad16932013-06-17 14:16:11 -07001949 return;
David Stevense4f67ad2012-11-20 02:50:14 +00001950 }
stephen hemmingeref59feb2012-10-09 20:35:46 +00001951 goto drop;
David Stevense4f67ad2012-11-20 02:50:14 +00001952 }
stephen hemmingeref59feb2012-10-09 20:35:46 +00001953
stephen hemmingerd3428942012-10-01 12:32:35 +00001954 old_iph = ip_hdr(skb);
1955
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001956 ttl = vxlan->cfg.ttl;
Cong Wange4c7ed42013-08-31 13:44:33 +08001957 if (!ttl && vxlan_addr_multicast(dst))
stephen hemmingerd3428942012-10-01 12:32:35 +00001958 ttl = 1;
1959
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001960 tos = vxlan->cfg.tos;
stephen hemmingerd3428942012-10-01 12:32:35 +00001961 if (tos == 1)
Pravin B Shelar206aaaf2013-03-25 14:49:53 +00001962 tos = ip_tunnel_get_dsfield(old_iph, skb);
stephen hemmingerd3428942012-10-01 12:32:35 +00001963
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001964 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
1965 vxlan->cfg.port_max, true);
stephen hemmingerd3428942012-10-01 12:32:35 +00001966
Jiri Benca725e512015-08-20 13:56:30 +02001967 if (info) {
1968 if (info->key.tun_flags & TUNNEL_CSUM)
1969 flags |= VXLAN_F_UDP_CSUM;
1970 else
1971 flags &= ~VXLAN_F_UDP_CSUM;
1972
1973 ttl = info->key.ttl;
1974 tos = info->key.tos;
1975
1976 if (info->options_len)
1977 md = ip_tunnel_info_opts(info, sizeof(*md));
1978 } else {
1979 md->gbp = skb->mark;
1980 }
1981
Cong Wange4c7ed42013-08-31 13:44:33 +08001982 if (dst->sa.sa_family == AF_INET) {
Jiri Benca725e512015-08-20 13:56:30 +02001983 if (info && (info->key.tun_flags & TUNNEL_DONT_FRAGMENT))
1984 df = htons(IP_DF);
Thomas Grafee122c72015-07-21 10:43:58 +02001985
Cong Wange4c7ed42013-08-31 13:44:33 +08001986 memset(&fl4, 0, sizeof(fl4));
Thomas Grafee122c72015-07-21 10:43:58 +02001987 fl4.flowi4_oif = rdst ? rdst->remote_ifindex : 0;
Cong Wange4c7ed42013-08-31 13:44:33 +08001988 fl4.flowi4_tos = RT_TOS(tos);
Thomas Graf239fb792015-05-05 15:09:21 +02001989 fl4.flowi4_mark = skb->mark;
1990 fl4.flowi4_proto = IPPROTO_UDP;
Cong Wange4c7ed42013-08-31 13:44:33 +08001991 fl4.daddr = dst->sin.sin_addr.s_addr;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001992 fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr;
stephen hemmingerca78f182012-10-09 20:35:48 +00001993
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02001994 rt = ip_route_output_key(vxlan->net, &fl4);
Cong Wange4c7ed42013-08-31 13:44:33 +08001995 if (IS_ERR(rt)) {
1996 netdev_dbg(dev, "no route to %pI4\n",
1997 &dst->sin.sin_addr.s_addr);
1998 dev->stats.tx_carrier_errors++;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00001999 goto tx_error;
Cong Wange4c7ed42013-08-31 13:44:33 +08002000 }
2001
2002 if (rt->dst.dev == dev) {
2003 netdev_dbg(dev, "circular route to %pI4\n",
2004 &dst->sin.sin_addr.s_addr);
2005 dev->stats.collisions++;
Fan Dufffc15a2013-12-09 10:33:53 +08002006 goto rt_tx_error;
Cong Wange4c7ed42013-08-31 13:44:33 +08002007 }
2008
2009 /* Bypass encapsulation if the destination is local */
2010 if (rt->rt_flags & RTCF_LOCAL &&
2011 !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
2012 struct vxlan_dev *dst_vxlan;
2013
2014 ip_rt_put(rt);
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02002015 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
Thomas Grafac5132d2015-01-15 03:53:56 +01002016 dst->sa.sa_family, dst_port,
2017 vxlan->flags);
Cong Wange4c7ed42013-08-31 13:44:33 +08002018 if (!dst_vxlan)
2019 goto tx_error;
2020 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2021 return;
2022 }
2023
2024 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2025 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
David Miller79b16aa2015-04-05 22:19:09 -04002026 err = vxlan_xmit_skb(rt, sk, skb, fl4.saddr,
Tom Herbertaf33c1a2015-01-20 11:23:05 -08002027 dst->sin.sin_addr.s_addr, tos, ttl, df,
Thomas Graf614732e2015-07-21 10:44:06 +02002028 src_port, dst_port, htonl(vni << 8), md,
Tom Herbertaf33c1a2015-01-20 11:23:05 -08002029 !net_eq(vxlan->net, dev_net(vxlan->dev)),
Thomas Grafee122c72015-07-21 10:43:58 +02002030 flags);
Pravin B Shelar74f47272014-12-23 16:20:36 -08002031 if (err < 0) {
2032 /* skb is already freed. */
2033 skb = NULL;
Cong Wange4c7ed42013-08-31 13:44:33 +08002034 goto rt_tx_error;
Pravin B Shelar74f47272014-12-23 16:20:36 -08002035 }
2036
Cong Wange4c7ed42013-08-31 13:44:33 +08002037 iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
2038#if IS_ENABLED(CONFIG_IPV6)
2039 } else {
Cong Wange4c7ed42013-08-31 13:44:33 +08002040 struct dst_entry *ndst;
2041 struct flowi6 fl6;
Jiri Benc6f264e42015-08-20 13:56:29 +02002042 u32 rt6i_flags;
Cong Wange4c7ed42013-08-31 13:44:33 +08002043
2044 memset(&fl6, 0, sizeof(fl6));
Thomas Grafee122c72015-07-21 10:43:58 +02002045 fl6.flowi6_oif = rdst ? rdst->remote_ifindex : 0;
Cong Wange4c7ed42013-08-31 13:44:33 +08002046 fl6.daddr = dst->sin6.sin6_addr;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002047 fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr;
Thomas Graf239fb792015-05-05 15:09:21 +02002048 fl6.flowi6_mark = skb->mark;
Cong Wang8c1bb792013-09-02 10:06:51 +08002049 fl6.flowi6_proto = IPPROTO_UDP;
Cong Wange4c7ed42013-08-31 13:44:33 +08002050
Roopa Prabhu343d60a2015-07-30 13:34:53 -07002051 if (ipv6_stub->ipv6_dst_lookup(vxlan->net, sk, &ndst, &fl6)) {
Cong Wange4c7ed42013-08-31 13:44:33 +08002052 netdev_dbg(dev, "no route to %pI6\n",
2053 &dst->sin6.sin6_addr);
2054 dev->stats.tx_carrier_errors++;
2055 goto tx_error;
2056 }
2057
2058 if (ndst->dev == dev) {
2059 netdev_dbg(dev, "circular route to %pI6\n",
2060 &dst->sin6.sin6_addr);
2061 dst_release(ndst);
2062 dev->stats.collisions++;
2063 goto tx_error;
2064 }
2065
2066 /* Bypass encapsulation if the destination is local */
Jiri Benc6f264e42015-08-20 13:56:29 +02002067 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
2068 if (rt6i_flags & RTF_LOCAL &&
2069 !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
Cong Wange4c7ed42013-08-31 13:44:33 +08002070 struct vxlan_dev *dst_vxlan;
2071
2072 dst_release(ndst);
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02002073 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
Thomas Grafac5132d2015-01-15 03:53:56 +01002074 dst->sa.sa_family, dst_port,
2075 vxlan->flags);
Cong Wange4c7ed42013-08-31 13:44:33 +08002076 if (!dst_vxlan)
2077 goto tx_error;
2078 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2079 return;
2080 }
2081
2082 ttl = ttl ? : ip6_dst_hoplimit(ndst);
David Miller79b16aa2015-04-05 22:19:09 -04002083 err = vxlan6_xmit_skb(ndst, sk, skb, dev, &fl6.saddr, &fl6.daddr,
Thomas Graf614732e2015-07-21 10:44:06 +02002084 0, ttl, src_port, dst_port, htonl(vni << 8), md,
Tom Herbertaf33c1a2015-01-20 11:23:05 -08002085 !net_eq(vxlan->net, dev_net(vxlan->dev)),
Jiri Benca725e512015-08-20 13:56:30 +02002086 flags);
Cong Wange4c7ed42013-08-31 13:44:33 +08002087#endif
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002088 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002089
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002090 return;
stephen hemmingerd3428942012-10-01 12:32:35 +00002091
2092drop:
2093 dev->stats.tx_dropped++;
2094 goto tx_free;
2095
Pravin B Shelar49560532013-08-19 11:23:17 -07002096rt_tx_error:
2097 ip_rt_put(rt);
stephen hemmingerd3428942012-10-01 12:32:35 +00002098tx_error:
2099 dev->stats.tx_errors++;
2100tx_free:
2101 dev_kfree_skb(skb);
stephen hemmingerd3428942012-10-01 12:32:35 +00002102}
2103
David Stevens66817122013-03-15 04:35:51 +00002104/* Transmit local packets over Vxlan
2105 *
2106 * Outer IP header inherits ECN and DF from inner header.
2107 * Outer UDP destination is the VXLAN assigned port.
2108 * source port is based on hash of flow
2109 */
2110static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2111{
2112 struct vxlan_dev *vxlan = netdev_priv(dev);
Thomas Graf3093fbe2015-07-21 10:44:00 +02002113 const struct ip_tunnel_info *info;
David Stevens66817122013-03-15 04:35:51 +00002114 struct ethhdr *eth;
2115 bool did_rsc = false;
Eric Dumazet8f646c92014-01-06 09:54:31 -08002116 struct vxlan_rdst *rdst, *fdst = NULL;
David Stevens66817122013-03-15 04:35:51 +00002117 struct vxlan_fdb *f;
David Stevens66817122013-03-15 04:35:51 +00002118
Jiri Benc61adedf2015-08-20 13:56:25 +02002119 info = skb_tunnel_info(skb);
Thomas Graf3093fbe2015-07-21 10:44:00 +02002120
David Stevens66817122013-03-15 04:35:51 +00002121 skb_reset_mac_header(skb);
2122 eth = eth_hdr(skb);
2123
Cong Wangf564f452013-08-31 13:44:36 +08002124 if ((vxlan->flags & VXLAN_F_PROXY)) {
2125 if (ntohs(eth->h_proto) == ETH_P_ARP)
2126 return arp_reduce(dev, skb);
2127#if IS_ENABLED(CONFIG_IPV6)
2128 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
Li RongQing91269e32014-10-16 09:17:18 +08002129 pskb_may_pull(skb, sizeof(struct ipv6hdr)
2130 + sizeof(struct nd_msg)) &&
Cong Wangf564f452013-08-31 13:44:36 +08002131 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2132 struct nd_msg *msg;
2133
2134 msg = (struct nd_msg *)skb_transport_header(skb);
2135 if (msg->icmph.icmp6_code == 0 &&
2136 msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
2137 return neigh_reduce(dev, skb);
2138 }
Li RongQing7a9f5262014-10-17 14:06:16 +08002139 eth = eth_hdr(skb);
Cong Wangf564f452013-08-31 13:44:36 +08002140#endif
2141 }
David Stevens66817122013-03-15 04:35:51 +00002142
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07002143 if (vxlan->flags & VXLAN_F_COLLECT_METADATA &&
Thomas Grafee122c72015-07-21 10:43:58 +02002144 info && info->mode == IP_TUNNEL_INFO_TX) {
2145 vxlan_xmit_one(skb, dev, NULL, false);
2146 return NETDEV_TX_OK;
2147 }
2148
David Stevens66817122013-03-15 04:35:51 +00002149 f = vxlan_find_mac(vxlan, eth->h_dest);
David Stevensae884082013-04-19 00:36:26 +00002150 did_rsc = false;
2151
2152 if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) &&
Cong Wange15a00a2013-08-31 13:44:34 +08002153 (ntohs(eth->h_proto) == ETH_P_IP ||
2154 ntohs(eth->h_proto) == ETH_P_IPV6)) {
David Stevensae884082013-04-19 00:36:26 +00002155 did_rsc = route_shortcircuit(dev, skb);
2156 if (did_rsc)
2157 f = vxlan_find_mac(vxlan, eth->h_dest);
2158 }
2159
David Stevens66817122013-03-15 04:35:51 +00002160 if (f == NULL) {
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002161 f = vxlan_find_mac(vxlan, all_zeros_mac);
2162 if (f == NULL) {
2163 if ((vxlan->flags & VXLAN_F_L2MISS) &&
2164 !is_multicast_ether_addr(eth->h_dest))
2165 vxlan_fdb_miss(vxlan, eth->h_dest);
David Stevens66817122013-03-15 04:35:51 +00002166
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002167 dev->stats.tx_dropped++;
Eric Dumazet8f646c92014-01-06 09:54:31 -08002168 kfree_skb(skb);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002169 return NETDEV_TX_OK;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07002170 }
David Stevens66817122013-03-15 04:35:51 +00002171 }
2172
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002173 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2174 struct sk_buff *skb1;
2175
Eric Dumazet8f646c92014-01-06 09:54:31 -08002176 if (!fdst) {
2177 fdst = rdst;
2178 continue;
2179 }
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002180 skb1 = skb_clone(skb, GFP_ATOMIC);
2181 if (skb1)
2182 vxlan_xmit_one(skb1, dev, rdst, did_rsc);
2183 }
2184
Eric Dumazet8f646c92014-01-06 09:54:31 -08002185 if (fdst)
2186 vxlan_xmit_one(skb, dev, fdst, did_rsc);
2187 else
2188 kfree_skb(skb);
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002189 return NETDEV_TX_OK;
David Stevens66817122013-03-15 04:35:51 +00002190}
2191
stephen hemmingerd3428942012-10-01 12:32:35 +00002192/* Walk the forwarding table and purge stale entries */
2193static void vxlan_cleanup(unsigned long arg)
2194{
2195 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
2196 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2197 unsigned int h;
2198
2199 if (!netif_running(vxlan->dev))
2200 return;
2201
stephen hemmingerd3428942012-10-01 12:32:35 +00002202 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2203 struct hlist_node *p, *n;
Sorin Dumitru14e1d0f2015-05-26 10:42:04 +03002204
2205 spin_lock_bh(&vxlan->hash_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00002206 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2207 struct vxlan_fdb *f
2208 = container_of(p, struct vxlan_fdb, hlist);
2209 unsigned long timeout;
2210
stephen hemminger3c172862012-10-26 06:24:34 +00002211 if (f->state & NUD_PERMANENT)
stephen hemmingerd3428942012-10-01 12:32:35 +00002212 continue;
2213
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002214 timeout = f->used + vxlan->cfg.age_interval * HZ;
stephen hemmingerd3428942012-10-01 12:32:35 +00002215 if (time_before_eq(timeout, jiffies)) {
2216 netdev_dbg(vxlan->dev,
2217 "garbage collect %pM\n",
2218 f->eth_addr);
2219 f->state = NUD_STALE;
2220 vxlan_fdb_destroy(vxlan, f);
2221 } else if (time_before(timeout, next_timer))
2222 next_timer = timeout;
2223 }
Sorin Dumitru14e1d0f2015-05-26 10:42:04 +03002224 spin_unlock_bh(&vxlan->hash_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00002225 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002226
2227 mod_timer(&vxlan->age_timer, next_timer);
2228}
2229
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002230static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
2231{
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002232 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002233 __u32 vni = vxlan->default_dst.remote_vni;
2234
2235 vxlan->vn_sock = vs;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002236 spin_lock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002237 hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002238 spin_unlock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002239}
2240
stephen hemmingerd3428942012-10-01 12:32:35 +00002241/* Setup stats when device is created */
2242static int vxlan_init(struct net_device *dev)
2243{
WANG Cong1c213bd2014-02-13 11:46:28 -08002244 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
Pravin B Shelare8171042013-03-25 14:49:46 +00002245 if (!dev->tstats)
stephen hemmingerd3428942012-10-01 12:32:35 +00002246 return -ENOMEM;
2247
2248 return 0;
2249}
2250
Stephen Hemmingerba609e92013-06-25 17:06:01 -07002251static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan)
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002252{
2253 struct vxlan_fdb *f;
2254
2255 spin_lock_bh(&vxlan->hash_lock);
2256 f = __vxlan_find_mac(vxlan, all_zeros_mac);
2257 if (f)
2258 vxlan_fdb_destroy(vxlan, f);
2259 spin_unlock_bh(&vxlan->hash_lock);
2260}
2261
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002262static void vxlan_uninit(struct net_device *dev)
2263{
2264 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002265
Stephen Hemmingerba609e92013-06-25 17:06:01 -07002266 vxlan_fdb_delete_default(vxlan);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002267
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002268 free_percpu(dev->tstats);
2269}
2270
stephen hemmingerd3428942012-10-01 12:32:35 +00002271/* Start ageing timer and join group when device is brought up */
2272static int vxlan_open(struct net_device *dev)
2273{
2274 struct vxlan_dev *vxlan = netdev_priv(dev);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002275 struct vxlan_sock *vs;
2276 int ret = 0;
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002277
Thomas Graf614732e2015-07-21 10:44:06 +02002278 vs = vxlan_sock_add(vxlan->net, vxlan->cfg.dst_port,
2279 vxlan->cfg.no_share, vxlan->flags);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002280 if (IS_ERR(vs))
2281 return PTR_ERR(vs);
2282
2283 vxlan_vs_add_dev(vs, vxlan);
stephen hemmingerd3428942012-10-01 12:32:35 +00002284
Gao feng79d4a942013-12-10 16:37:32 +08002285 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002286 ret = vxlan_igmp_join(vxlan);
2287 if (ret) {
2288 vxlan_sock_release(vs);
2289 return ret;
2290 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002291 }
2292
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002293 if (vxlan->cfg.age_interval)
stephen hemmingerd3428942012-10-01 12:32:35 +00002294 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2295
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002296 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002297}
2298
2299/* Purge the forwarding table */
2300static void vxlan_flush(struct vxlan_dev *vxlan)
2301{
Cong Wang31fec5a2013-05-27 22:35:52 +00002302 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002303
2304 spin_lock_bh(&vxlan->hash_lock);
2305 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2306 struct hlist_node *p, *n;
2307 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2308 struct vxlan_fdb *f
2309 = container_of(p, struct vxlan_fdb, hlist);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002310 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2311 if (!is_zero_ether_addr(f->eth_addr))
2312 vxlan_fdb_destroy(vxlan, f);
stephen hemmingerd3428942012-10-01 12:32:35 +00002313 }
2314 }
2315 spin_unlock_bh(&vxlan->hash_lock);
2316}
2317
2318/* Cleanup timer and forwarding table on shutdown */
2319static int vxlan_stop(struct net_device *dev)
2320{
2321 struct vxlan_dev *vxlan = netdev_priv(dev);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002322 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002323 struct vxlan_sock *vs = vxlan->vn_sock;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002324 int ret = 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00002325
Marcelo Ricardo Leitner24c0e682015-03-23 16:23:12 -03002326 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
WANG Congf13b1682015-04-08 14:48:30 -07002327 !vxlan_group_used(vn, vxlan))
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002328 ret = vxlan_igmp_leave(vxlan);
stephen hemmingerd3428942012-10-01 12:32:35 +00002329
2330 del_timer_sync(&vxlan->age_timer);
2331
2332 vxlan_flush(vxlan);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002333 vxlan_sock_release(vs);
stephen hemmingerd3428942012-10-01 12:32:35 +00002334
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002335 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002336}
2337
stephen hemmingerd3428942012-10-01 12:32:35 +00002338/* Stub, nothing needs to be done. */
2339static void vxlan_set_multicast_list(struct net_device *dev)
2340{
2341}
2342
Daniel Borkmann345010b2013-12-18 00:21:08 +01002343static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2344{
2345 struct vxlan_dev *vxlan = netdev_priv(dev);
2346 struct vxlan_rdst *dst = &vxlan->default_dst;
2347 struct net_device *lowerdev;
2348 int max_mtu;
2349
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002350 lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex);
Daniel Borkmann345010b2013-12-18 00:21:08 +01002351 if (lowerdev == NULL)
2352 return eth_change_mtu(dev, new_mtu);
2353
2354 if (dst->remote_ip.sa.sa_family == AF_INET6)
2355 max_mtu = lowerdev->mtu - VXLAN6_HEADROOM;
2356 else
2357 max_mtu = lowerdev->mtu - VXLAN_HEADROOM;
2358
2359 if (new_mtu < 68 || new_mtu > max_mtu)
2360 return -EINVAL;
2361
2362 dev->mtu = new_mtu;
2363 return 0;
2364}
2365
stephen hemmingerd3428942012-10-01 12:32:35 +00002366static const struct net_device_ops vxlan_netdev_ops = {
2367 .ndo_init = vxlan_init,
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002368 .ndo_uninit = vxlan_uninit,
stephen hemmingerd3428942012-10-01 12:32:35 +00002369 .ndo_open = vxlan_open,
2370 .ndo_stop = vxlan_stop,
2371 .ndo_start_xmit = vxlan_xmit,
Pravin B Shelare8171042013-03-25 14:49:46 +00002372 .ndo_get_stats64 = ip_tunnel_get_stats64,
stephen hemmingerd3428942012-10-01 12:32:35 +00002373 .ndo_set_rx_mode = vxlan_set_multicast_list,
Daniel Borkmann345010b2013-12-18 00:21:08 +01002374 .ndo_change_mtu = vxlan_change_mtu,
stephen hemmingerd3428942012-10-01 12:32:35 +00002375 .ndo_validate_addr = eth_validate_addr,
2376 .ndo_set_mac_address = eth_mac_addr,
2377 .ndo_fdb_add = vxlan_fdb_add,
2378 .ndo_fdb_del = vxlan_fdb_delete,
2379 .ndo_fdb_dump = vxlan_fdb_dump,
2380};
2381
2382/* Info for udev, that this is a virtual tunnel endpoint */
2383static struct device_type vxlan_type = {
2384 .name = "vxlan",
2385};
2386
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002387/* Calls the ndo_add_vxlan_port of the caller in order to
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002388 * supply the listening VXLAN udp ports. Callers are expected
2389 * to implement the ndo_add_vxlan_port.
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002390 */
2391void vxlan_get_rx_port(struct net_device *dev)
2392{
2393 struct vxlan_sock *vs;
2394 struct net *net = dev_net(dev);
2395 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2396 sa_family_t sa_family;
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002397 __be16 port;
2398 unsigned int i;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002399
2400 spin_lock(&vn->sock_lock);
2401 for (i = 0; i < PORT_HASH_SIZE; ++i) {
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002402 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2403 port = inet_sk(vs->sock->sk)->inet_sport;
Jiri Benc705cc622015-08-20 13:56:28 +02002404 sa_family = vxlan_get_sk_family(vs);
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002405 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
2406 port);
2407 }
2408 }
2409 spin_unlock(&vn->sock_lock);
2410}
2411EXPORT_SYMBOL_GPL(vxlan_get_rx_port);
2412
stephen hemmingerd3428942012-10-01 12:32:35 +00002413/* Initialize the device structure. */
2414static void vxlan_setup(struct net_device *dev)
2415{
2416 struct vxlan_dev *vxlan = netdev_priv(dev);
Cong Wang31fec5a2013-05-27 22:35:52 +00002417 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002418
2419 eth_hw_addr_random(dev);
2420 ether_setup(dev);
Cong Wange4c7ed42013-08-31 13:44:33 +08002421 if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6)
Cong Wang2853af62014-06-12 11:53:10 -07002422 dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM;
Cong Wange4c7ed42013-08-31 13:44:33 +08002423 else
Cong Wang2853af62014-06-12 11:53:10 -07002424 dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM;
stephen hemmingerd3428942012-10-01 12:32:35 +00002425
2426 dev->netdev_ops = &vxlan_netdev_ops;
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002427 dev->destructor = free_netdev;
stephen hemmingerd3428942012-10-01 12:32:35 +00002428 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2429
stephen hemmingerd3428942012-10-01 12:32:35 +00002430 dev->features |= NETIF_F_LLTX;
Joseph Gasparakisd6727fe2012-12-07 14:14:16 +00002431 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002432 dev->features |= NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002433 dev->features |= NETIF_F_GSO_SOFTWARE;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002434
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07002435 dev->vlan_features = dev->features;
2436 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002437 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002438 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07002439 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
Eric Dumazet02875872014-10-05 18:38:35 -07002440 netif_keep_dst(dev);
Phil Sutter22dba392015-08-18 10:30:35 +02002441 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
stephen hemmingerd3428942012-10-01 12:32:35 +00002442
stephen hemminger553675f2013-05-16 11:35:20 +00002443 INIT_LIST_HEAD(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00002444 spin_lock_init(&vxlan->hash_lock);
2445
2446 init_timer_deferrable(&vxlan->age_timer);
2447 vxlan->age_timer.function = vxlan_cleanup;
2448 vxlan->age_timer.data = (unsigned long) vxlan;
2449
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002450 vxlan->cfg.dst_port = htons(vxlan_port);
stephen hemminger05f47d62012-10-09 20:35:50 +00002451
stephen hemmingerd3428942012-10-01 12:32:35 +00002452 vxlan->dev = dev;
2453
2454 for (h = 0; h < FDB_HASH_SIZE; ++h)
2455 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2456}
2457
2458static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2459 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
stephen hemminger5d174dd2013-04-27 11:31:55 +00002460 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002461 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002462 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2463 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002464 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002465 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2466 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
2467 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2468 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2469 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
stephen hemminger05f47d62012-10-09 20:35:50 +00002470 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
David Stevense4f67ad2012-11-20 02:50:14 +00002471 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2472 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2473 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2474 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
Alexei Starovoitovf8a9b1b2015-07-30 20:10:22 -07002475 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
stephen hemminger823aa872013-04-27 11:31:57 +00002476 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
Tom Herbert5c91ae02014-11-06 18:06:01 -08002477 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2478 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2479 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
Tom Herbertdfd86452015-01-12 17:00:38 -08002480 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2481 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
Thomas Graf35114942015-01-15 03:53:55 +01002482 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
Tom Herbert0ace2ca2015-02-10 16:30:32 -08002483 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
stephen hemmingerd3428942012-10-01 12:32:35 +00002484};
2485
2486static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
2487{
2488 if (tb[IFLA_ADDRESS]) {
2489 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2490 pr_debug("invalid link address (not ethernet)\n");
2491 return -EINVAL;
2492 }
2493
2494 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2495 pr_debug("invalid all zero ethernet address\n");
2496 return -EADDRNOTAVAIL;
2497 }
2498 }
2499
2500 if (!data)
2501 return -EINVAL;
2502
2503 if (data[IFLA_VXLAN_ID]) {
2504 __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2505 if (id >= VXLAN_VID_MASK)
2506 return -ERANGE;
2507 }
2508
stephen hemminger05f47d62012-10-09 20:35:50 +00002509 if (data[IFLA_VXLAN_PORT_RANGE]) {
2510 const struct ifla_vxlan_port_range *p
2511 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2512
2513 if (ntohs(p->high) < ntohs(p->low)) {
2514 pr_debug("port range %u .. %u not valid\n",
2515 ntohs(p->low), ntohs(p->high));
2516 return -EINVAL;
2517 }
2518 }
2519
stephen hemmingerd3428942012-10-01 12:32:35 +00002520 return 0;
2521}
2522
Yan Burman1b13c972013-01-29 23:43:07 +00002523static void vxlan_get_drvinfo(struct net_device *netdev,
2524 struct ethtool_drvinfo *drvinfo)
2525{
2526 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2527 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2528}
2529
2530static const struct ethtool_ops vxlan_ethtool_ops = {
2531 .get_drvinfo = vxlan_get_drvinfo,
2532 .get_link = ethtool_op_get_link,
2533};
2534
stephen hemminger553675f2013-05-16 11:35:20 +00002535static void vxlan_del_work(struct work_struct *work)
2536{
2537 struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
Andy Zhouacbf74a2014-09-16 17:31:18 -07002538 udp_tunnel_sock_release(vs->sock);
stephen hemminger553675f2013-05-16 11:35:20 +00002539 kfree_rcu(vs, rcu);
2540}
2541
Tom Herbert3ee64f32014-07-13 19:49:42 -07002542static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2543 __be16 port, u32 flags)
stephen hemminger553675f2013-05-16 11:35:20 +00002544{
Cong Wange4c7ed42013-08-31 13:44:33 +08002545 struct socket *sock;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002546 struct udp_port_cfg udp_conf;
2547 int err;
Cong Wange4c7ed42013-08-31 13:44:33 +08002548
Tom Herbert3ee64f32014-07-13 19:49:42 -07002549 memset(&udp_conf, 0, sizeof(udp_conf));
2550
2551 if (ipv6) {
2552 udp_conf.family = AF_INET6;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002553 udp_conf.use_udp6_rx_checksums =
Alexander Duyck3dc2b6a2014-11-24 20:08:38 -08002554 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
Tom Herbert3ee64f32014-07-13 19:49:42 -07002555 } else {
2556 udp_conf.family = AF_INET;
Cong Wange4c7ed42013-08-31 13:44:33 +08002557 }
2558
Tom Herbert3ee64f32014-07-13 19:49:42 -07002559 udp_conf.local_udp_port = port;
Cong Wange4c7ed42013-08-31 13:44:33 +08002560
Tom Herbert3ee64f32014-07-13 19:49:42 -07002561 /* Open UDP socket */
2562 err = udp_sock_create(net, &udp_conf, &sock);
2563 if (err < 0)
2564 return ERR_PTR(err);
Cong Wange4c7ed42013-08-31 13:44:33 +08002565
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002566 return sock;
Cong Wange4c7ed42013-08-31 13:44:33 +08002567}
2568
2569/* Create new listen socket if needed */
2570static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
Tom Herbert359a0ea2014-06-04 17:20:29 -07002571 u32 flags)
Cong Wange4c7ed42013-08-31 13:44:33 +08002572{
2573 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2574 struct vxlan_sock *vs;
2575 struct socket *sock;
Cong Wang31fec5a2013-05-27 22:35:52 +00002576 unsigned int h;
Tom Herbert359a0ea2014-06-04 17:20:29 -07002577 bool ipv6 = !!(flags & VXLAN_F_IPV6);
Andy Zhouacbf74a2014-09-16 17:31:18 -07002578 struct udp_tunnel_sock_cfg tunnel_cfg;
stephen hemminger553675f2013-05-16 11:35:20 +00002579
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02002580 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
Cong Wange4c7ed42013-08-31 13:44:33 +08002581 if (!vs)
stephen hemminger553675f2013-05-16 11:35:20 +00002582 return ERR_PTR(-ENOMEM);
2583
2584 for (h = 0; h < VNI_HASH_SIZE; ++h)
2585 INIT_HLIST_HEAD(&vs->vni_list[h]);
2586
2587 INIT_WORK(&vs->del_work, vxlan_del_work);
2588
Tom Herbert3ee64f32014-07-13 19:49:42 -07002589 sock = vxlan_create_sock(net, ipv6, port, flags);
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002590 if (IS_ERR(sock)) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002591 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port),
2592 PTR_ERR(sock));
stephen hemminger553675f2013-05-16 11:35:20 +00002593 kfree(vs);
Duan Jionge50fddc2013-11-01 13:09:43 +08002594 return ERR_CAST(sock);
stephen hemminger553675f2013-05-16 11:35:20 +00002595 }
2596
Cong Wange4c7ed42013-08-31 13:44:33 +08002597 vs->sock = sock;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002598 atomic_set(&vs->refcnt, 1);
Tom Herbertaf33c1a2015-01-20 11:23:05 -08002599 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
stephen hemminger553675f2013-05-16 11:35:20 +00002600
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02002601 /* Initialize the vxlan udp offloads structure */
2602 vs->udp_offloads.port = port;
2603 vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive;
2604 vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete;
2605
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002606 spin_lock(&vn->sock_lock);
2607 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02002608 vxlan_notify_add_rx_port(vs);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002609 spin_unlock(&vn->sock_lock);
stephen hemminger553675f2013-05-16 11:35:20 +00002610
2611 /* Mark socket as an encapsulation socket. */
Andy Zhouacbf74a2014-09-16 17:31:18 -07002612 tunnel_cfg.sk_user_data = vs;
2613 tunnel_cfg.encap_type = 1;
2614 tunnel_cfg.encap_rcv = vxlan_udp_encap_recv;
2615 tunnel_cfg.encap_destroy = NULL;
2616
2617 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
Cong Wange4c7ed42013-08-31 13:44:33 +08002618
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002619 return vs;
2620}
stephen hemminger553675f2013-05-16 11:35:20 +00002621
Thomas Graf614732e2015-07-21 10:44:06 +02002622static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
2623 bool no_share, u32 flags)
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002624{
2625 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2626 struct vxlan_sock *vs;
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -02002627 bool ipv6 = flags & VXLAN_F_IPV6;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002628
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002629 if (!no_share) {
2630 spin_lock(&vn->sock_lock);
2631 vs = vxlan_find_sock(net, ipv6 ? AF_INET6 : AF_INET, port,
2632 flags);
Thomas Graf614732e2015-07-21 10:44:06 +02002633 if (vs) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002634 if (!atomic_add_unless(&vs->refcnt, 1, 0))
2635 vs = ERR_PTR(-EBUSY);
2636 spin_unlock(&vn->sock_lock);
2637 return vs;
2638 }
2639 spin_unlock(&vn->sock_lock);
2640 }
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002641
Thomas Graf614732e2015-07-21 10:44:06 +02002642 return vxlan_socket_create(net, port, flags);
stephen hemminger553675f2013-05-16 11:35:20 +00002643}
2644
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002645static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
2646 struct vxlan_config *conf)
stephen hemmingerd3428942012-10-01 12:32:35 +00002647{
Nicolas Dichtel33564bb2015-01-26 22:28:14 +01002648 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
stephen hemmingerd3428942012-10-01 12:32:35 +00002649 struct vxlan_dev *vxlan = netdev_priv(dev);
Atzm Watanabec7995c42013-04-16 02:50:52 +00002650 struct vxlan_rdst *dst = &vxlan->default_dst;
stephen hemmingerd3428942012-10-01 12:32:35 +00002651 int err;
Cong Wange4c7ed42013-08-31 13:44:33 +08002652 bool use_ipv6 = false;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002653 __be16 default_port = vxlan->cfg.dst_port;
stephen hemmingerd3428942012-10-01 12:32:35 +00002654
Nicolas Dichtel33564bb2015-01-26 22:28:14 +01002655 vxlan->net = src_net;
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002656
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002657 dst->remote_vni = conf->vni;
2658
2659 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
stephen hemmingerd3428942012-10-01 12:32:35 +00002660
Mike Rapoport5933a7b2014-04-01 09:23:01 +03002661 /* Unless IPv6 is explicitly requested, assume IPv4 */
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002662 if (!dst->remote_ip.sa.sa_family)
2663 dst->remote_ip.sa.sa_family = AF_INET;
stephen hemmingerd3428942012-10-01 12:32:35 +00002664
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002665 if (dst->remote_ip.sa.sa_family == AF_INET6 ||
2666 vxlan->cfg.saddr.sa.sa_family == AF_INET6)
Cong Wange4c7ed42013-08-31 13:44:33 +08002667 use_ipv6 = true;
Cong Wange4c7ed42013-08-31 13:44:33 +08002668
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002669 if (conf->remote_ifindex) {
stephen hemminger34e02aa2012-10-09 20:35:53 +00002670 struct net_device *lowerdev
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002671 = __dev_get_by_index(src_net, conf->remote_ifindex);
2672
2673 dst->remote_ifindex = conf->remote_ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +00002674
stephen hemminger34e02aa2012-10-09 20:35:53 +00002675 if (!lowerdev) {
Atzm Watanabec7995c42013-04-16 02:50:52 +00002676 pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
stephen hemminger34e02aa2012-10-09 20:35:53 +00002677 return -ENODEV;
stephen hemmingerd3428942012-10-01 12:32:35 +00002678 }
stephen hemminger34e02aa2012-10-09 20:35:53 +00002679
Cong Wange4c7ed42013-08-31 13:44:33 +08002680#if IS_ENABLED(CONFIG_IPV6)
2681 if (use_ipv6) {
2682 struct inet6_dev *idev = __in6_dev_get(lowerdev);
2683 if (idev && idev->cnf.disable_ipv6) {
2684 pr_info("IPv6 is disabled via sysctl\n");
2685 return -EPERM;
2686 }
2687 vxlan->flags |= VXLAN_F_IPV6;
2688 }
2689#endif
2690
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002691 if (!conf->mtu)
Cong Wange4c7ed42013-08-31 13:44:33 +08002692 dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
Alexander Duyck1ba56fb2012-11-13 13:10:59 +00002693
Cong Wang2853af62014-06-12 11:53:10 -07002694 dev->needed_headroom = lowerdev->hard_header_len +
Cong Wange4c7ed42013-08-31 13:44:33 +08002695 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
fan.du7bda7012014-01-03 10:18:58 +08002696 } else if (use_ipv6)
2697 vxlan->flags |= VXLAN_F_IPV6;
stephen hemmingerd3428942012-10-01 12:32:35 +00002698
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002699 memcpy(&vxlan->cfg, conf, sizeof(*conf));
2700 if (!vxlan->cfg.dst_port)
2701 vxlan->cfg.dst_port = default_port;
2702 vxlan->flags |= conf->flags;
stephen hemmingerd3428942012-10-01 12:32:35 +00002703
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002704 if (!vxlan->cfg.age_interval)
2705 vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
Vincent Bernatafb97182012-10-30 10:27:16 +00002706
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002707 if (vxlan_find_vni(src_net, conf->vni, use_ipv6 ? AF_INET6 : AF_INET,
2708 vxlan->cfg.dst_port, vxlan->flags))
stephen hemminger553675f2013-05-16 11:35:20 +00002709 return -EEXIST;
stephen hemminger553675f2013-05-16 11:35:20 +00002710
Wilfried Klaebe7ad24ea2014-05-11 00:12:32 +00002711 dev->ethtool_ops = &vxlan_ethtool_ops;
Yan Burman1b13c972013-01-29 23:43:07 +00002712
Sridhar Samudrala2936b6a2013-09-17 12:12:40 -07002713 /* create an fdb entry for a valid default destination */
2714 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
2715 err = vxlan_fdb_create(vxlan, all_zeros_mac,
2716 &vxlan->default_dst.remote_ip,
2717 NUD_REACHABLE|NUD_PERMANENT,
2718 NLM_F_EXCL|NLM_F_CREATE,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002719 vxlan->cfg.dst_port,
Sridhar Samudrala2936b6a2013-09-17 12:12:40 -07002720 vxlan->default_dst.remote_vni,
2721 vxlan->default_dst.remote_ifindex,
2722 NTF_SELF);
2723 if (err)
2724 return err;
2725 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002726
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002727 err = register_netdevice(dev);
2728 if (err) {
Stephen Hemmingerba609e92013-06-25 17:06:01 -07002729 vxlan_fdb_delete_default(vxlan);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002730 return err;
2731 }
2732
stephen hemminger553675f2013-05-16 11:35:20 +00002733 list_add(&vxlan->next, &vn->vxlan_list);
stephen hemminger553675f2013-05-16 11:35:20 +00002734
2735 return 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00002736}
2737
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002738struct net_device *vxlan_dev_create(struct net *net, const char *name,
2739 u8 name_assign_type, struct vxlan_config *conf)
2740{
2741 struct nlattr *tb[IFLA_MAX+1];
2742 struct net_device *dev;
2743 int err;
2744
2745 memset(&tb, 0, sizeof(tb));
2746
2747 dev = rtnl_create_link(net, name, name_assign_type,
2748 &vxlan_link_ops, tb);
2749 if (IS_ERR(dev))
2750 return dev;
2751
2752 err = vxlan_dev_configure(net, dev, conf);
2753 if (err < 0) {
2754 free_netdev(dev);
2755 return ERR_PTR(err);
2756 }
2757
2758 return dev;
2759}
2760EXPORT_SYMBOL_GPL(vxlan_dev_create);
2761
2762static int vxlan_newlink(struct net *src_net, struct net_device *dev,
2763 struct nlattr *tb[], struct nlattr *data[])
2764{
2765 struct vxlan_config conf;
2766 int err;
2767
2768 if (!data[IFLA_VXLAN_ID])
2769 return -EINVAL;
2770
2771 memset(&conf, 0, sizeof(conf));
2772 conf.vni = nla_get_u32(data[IFLA_VXLAN_ID]);
2773
2774 if (data[IFLA_VXLAN_GROUP]) {
2775 conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
2776 } else if (data[IFLA_VXLAN_GROUP6]) {
2777 if (!IS_ENABLED(CONFIG_IPV6))
2778 return -EPFNOSUPPORT;
2779
2780 conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
2781 conf.remote_ip.sa.sa_family = AF_INET6;
2782 }
2783
2784 if (data[IFLA_VXLAN_LOCAL]) {
2785 conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
2786 conf.saddr.sa.sa_family = AF_INET;
2787 } else if (data[IFLA_VXLAN_LOCAL6]) {
2788 if (!IS_ENABLED(CONFIG_IPV6))
2789 return -EPFNOSUPPORT;
2790
2791 /* TODO: respect scope id */
2792 conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
2793 conf.saddr.sa.sa_family = AF_INET6;
2794 }
2795
2796 if (data[IFLA_VXLAN_LINK])
2797 conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
2798
2799 if (data[IFLA_VXLAN_TOS])
2800 conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
2801
2802 if (data[IFLA_VXLAN_TTL])
2803 conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
2804
2805 if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
2806 conf.flags |= VXLAN_F_LEARN;
2807
2808 if (data[IFLA_VXLAN_AGEING])
2809 conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
2810
2811 if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
2812 conf.flags |= VXLAN_F_PROXY;
2813
2814 if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
2815 conf.flags |= VXLAN_F_RSC;
2816
2817 if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
2818 conf.flags |= VXLAN_F_L2MISS;
2819
2820 if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
2821 conf.flags |= VXLAN_F_L3MISS;
2822
2823 if (data[IFLA_VXLAN_LIMIT])
2824 conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
2825
Alexei Starovoitovf8a9b1b2015-07-30 20:10:22 -07002826 if (data[IFLA_VXLAN_COLLECT_METADATA] &&
2827 nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
2828 conf.flags |= VXLAN_F_COLLECT_METADATA;
2829
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002830 if (data[IFLA_VXLAN_PORT_RANGE]) {
2831 const struct ifla_vxlan_port_range *p
2832 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2833 conf.port_min = ntohs(p->low);
2834 conf.port_max = ntohs(p->high);
2835 }
2836
2837 if (data[IFLA_VXLAN_PORT])
2838 conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
2839
2840 if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
2841 conf.flags |= VXLAN_F_UDP_CSUM;
2842
2843 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
2844 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
2845 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
2846
2847 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
2848 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
2849 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
2850
2851 if (data[IFLA_VXLAN_REMCSUM_TX] &&
2852 nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
2853 conf.flags |= VXLAN_F_REMCSUM_TX;
2854
2855 if (data[IFLA_VXLAN_REMCSUM_RX] &&
2856 nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
2857 conf.flags |= VXLAN_F_REMCSUM_RX;
2858
2859 if (data[IFLA_VXLAN_GBP])
2860 conf.flags |= VXLAN_F_GBP;
2861
2862 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
2863 conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
2864
2865 err = vxlan_dev_configure(src_net, dev, &conf);
2866 switch (err) {
2867 case -ENODEV:
2868 pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
2869 break;
2870
2871 case -EPERM:
2872 pr_info("IPv6 is disabled via sysctl\n");
2873 break;
2874
2875 case -EEXIST:
2876 pr_info("duplicate VNI %u\n", conf.vni);
2877 break;
2878 }
2879
2880 return err;
2881}
2882
stephen hemmingerd3428942012-10-01 12:32:35 +00002883static void vxlan_dellink(struct net_device *dev, struct list_head *head)
2884{
2885 struct vxlan_dev *vxlan = netdev_priv(dev);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002886 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
stephen hemmingerd3428942012-10-01 12:32:35 +00002887
stephen hemmingerfe5c3562013-07-13 10:18:18 -07002888 spin_lock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002889 if (!hlist_unhashed(&vxlan->hlist))
2890 hlist_del_rcu(&vxlan->hlist);
stephen hemmingerfe5c3562013-07-13 10:18:18 -07002891 spin_unlock(&vn->sock_lock);
2892
stephen hemminger553675f2013-05-16 11:35:20 +00002893 list_del(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00002894 unregister_netdevice_queue(dev, head);
2895}
2896
2897static size_t vxlan_get_size(const struct net_device *dev)
2898{
2899
2900 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
Cong Wange4c7ed42013-08-31 13:44:33 +08002901 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00002902 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
Cong Wange4c7ed42013-08-31 13:44:33 +08002903 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00002904 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
2905 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
2906 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
David Stevense4f67ad2012-11-20 02:50:14 +00002907 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
2908 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
2909 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
2910 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07002911 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
stephen hemmingerd3428942012-10-01 12:32:35 +00002912 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
2913 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
stephen hemminger05f47d62012-10-09 20:35:50 +00002914 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
Tom Herbert359a0ea2014-06-04 17:20:29 -07002915 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
2916 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
2917 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
2918 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
Tom Herbertdfd86452015-01-12 17:00:38 -08002919 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
2920 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
stephen hemmingerd3428942012-10-01 12:32:35 +00002921 0;
2922}
2923
2924static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
2925{
2926 const struct vxlan_dev *vxlan = netdev_priv(dev);
Atzm Watanabec7995c42013-04-16 02:50:52 +00002927 const struct vxlan_rdst *dst = &vxlan->default_dst;
stephen hemminger05f47d62012-10-09 20:35:50 +00002928 struct ifla_vxlan_port_range ports = {
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002929 .low = htons(vxlan->cfg.port_min),
2930 .high = htons(vxlan->cfg.port_max),
stephen hemminger05f47d62012-10-09 20:35:50 +00002931 };
stephen hemmingerd3428942012-10-01 12:32:35 +00002932
Atzm Watanabec7995c42013-04-16 02:50:52 +00002933 if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni))
stephen hemmingerd3428942012-10-01 12:32:35 +00002934 goto nla_put_failure;
2935
Cong Wange4c7ed42013-08-31 13:44:33 +08002936 if (!vxlan_addr_any(&dst->remote_ip)) {
2937 if (dst->remote_ip.sa.sa_family == AF_INET) {
Jiri Benc930345e2015-03-29 16:59:25 +02002938 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
2939 dst->remote_ip.sin.sin_addr.s_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08002940 goto nla_put_failure;
2941#if IS_ENABLED(CONFIG_IPV6)
2942 } else {
Jiri Benc930345e2015-03-29 16:59:25 +02002943 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
2944 &dst->remote_ip.sin6.sin6_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08002945 goto nla_put_failure;
2946#endif
2947 }
2948 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002949
Atzm Watanabec7995c42013-04-16 02:50:52 +00002950 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
stephen hemmingerd3428942012-10-01 12:32:35 +00002951 goto nla_put_failure;
2952
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002953 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
2954 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
Jiri Benc930345e2015-03-29 16:59:25 +02002955 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002956 vxlan->cfg.saddr.sin.sin_addr.s_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08002957 goto nla_put_failure;
2958#if IS_ENABLED(CONFIG_IPV6)
2959 } else {
Jiri Benc930345e2015-03-29 16:59:25 +02002960 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002961 &vxlan->cfg.saddr.sin6.sin6_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08002962 goto nla_put_failure;
2963#endif
2964 }
2965 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002966
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002967 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
2968 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
David Stevense4f67ad2012-11-20 02:50:14 +00002969 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
2970 !!(vxlan->flags & VXLAN_F_LEARN)) ||
2971 nla_put_u8(skb, IFLA_VXLAN_PROXY,
2972 !!(vxlan->flags & VXLAN_F_PROXY)) ||
2973 nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) ||
2974 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
2975 !!(vxlan->flags & VXLAN_F_L2MISS)) ||
2976 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
2977 !!(vxlan->flags & VXLAN_F_L3MISS)) ||
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07002978 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
2979 !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) ||
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002980 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
2981 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
2982 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07002983 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
2984 !!(vxlan->flags & VXLAN_F_UDP_CSUM)) ||
2985 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
2986 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
2987 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
Tom Herbertdfd86452015-01-12 17:00:38 -08002988 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
2989 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
2990 !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) ||
2991 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
2992 !!(vxlan->flags & VXLAN_F_REMCSUM_RX)))
stephen hemmingerd3428942012-10-01 12:32:35 +00002993 goto nla_put_failure;
2994
stephen hemminger05f47d62012-10-09 20:35:50 +00002995 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
2996 goto nla_put_failure;
2997
Thomas Graf35114942015-01-15 03:53:55 +01002998 if (vxlan->flags & VXLAN_F_GBP &&
2999 nla_put_flag(skb, IFLA_VXLAN_GBP))
3000 goto nla_put_failure;
3001
Tom Herbert0ace2ca2015-02-10 16:30:32 -08003002 if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL &&
3003 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3004 goto nla_put_failure;
3005
stephen hemmingerd3428942012-10-01 12:32:35 +00003006 return 0;
3007
3008nla_put_failure:
3009 return -EMSGSIZE;
3010}
3011
Nicolas Dichtel1728d4f2015-01-15 15:11:17 +01003012static struct net *vxlan_get_link_net(const struct net_device *dev)
3013{
3014 struct vxlan_dev *vxlan = netdev_priv(dev);
3015
3016 return vxlan->net;
3017}
3018
stephen hemmingerd3428942012-10-01 12:32:35 +00003019static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3020 .kind = "vxlan",
3021 .maxtype = IFLA_VXLAN_MAX,
3022 .policy = vxlan_policy,
3023 .priv_size = sizeof(struct vxlan_dev),
3024 .setup = vxlan_setup,
3025 .validate = vxlan_validate,
3026 .newlink = vxlan_newlink,
3027 .dellink = vxlan_dellink,
3028 .get_size = vxlan_get_size,
3029 .fill_info = vxlan_fill_info,
Nicolas Dichtel1728d4f2015-01-15 15:11:17 +01003030 .get_link_net = vxlan_get_link_net,
stephen hemmingerd3428942012-10-01 12:32:35 +00003031};
3032
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003033static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3034 struct net_device *dev)
3035{
3036 struct vxlan_dev *vxlan, *next;
3037 LIST_HEAD(list_kill);
3038
3039 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3040 struct vxlan_rdst *dst = &vxlan->default_dst;
3041
3042 /* In case we created vxlan device with carrier
3043 * and we loose the carrier due to module unload
3044 * we also need to remove vxlan device. In other
3045 * cases, it's not necessary and remote_ifindex
3046 * is 0 here, so no matches.
3047 */
3048 if (dst->remote_ifindex == dev->ifindex)
3049 vxlan_dellink(vxlan->dev, &list_kill);
3050 }
3051
3052 unregister_netdevice_many(&list_kill);
3053}
3054
3055static int vxlan_lowerdev_event(struct notifier_block *unused,
3056 unsigned long event, void *ptr)
3057{
3058 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Daniel Borkmann783c1462014-01-22 21:07:53 +01003059 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003060
Daniel Borkmann783c1462014-01-22 21:07:53 +01003061 if (event == NETDEV_UNREGISTER)
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003062 vxlan_handle_lowerdev_unregister(vn, dev);
3063
3064 return NOTIFY_DONE;
3065}
3066
3067static struct notifier_block vxlan_notifier_block __read_mostly = {
3068 .notifier_call = vxlan_lowerdev_event,
3069};
3070
stephen hemmingerd3428942012-10-01 12:32:35 +00003071static __net_init int vxlan_init_net(struct net *net)
3072{
3073 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Cong Wang31fec5a2013-05-27 22:35:52 +00003074 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00003075
stephen hemminger553675f2013-05-16 11:35:20 +00003076 INIT_LIST_HEAD(&vn->vxlan_list);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07003077 spin_lock_init(&vn->sock_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00003078
stephen hemminger553675f2013-05-16 11:35:20 +00003079 for (h = 0; h < PORT_HASH_SIZE; ++h)
3080 INIT_HLIST_HEAD(&vn->sock_list[h]);
stephen hemmingerd3428942012-10-01 12:32:35 +00003081
3082 return 0;
3083}
3084
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003085static void __net_exit vxlan_exit_net(struct net *net)
3086{
3087 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3088 struct vxlan_dev *vxlan, *next;
3089 struct net_device *dev, *aux;
3090 LIST_HEAD(list);
3091
3092 rtnl_lock();
3093 for_each_netdev_safe(net, dev, aux)
3094 if (dev->rtnl_link_ops == &vxlan_link_ops)
3095 unregister_netdevice_queue(dev, &list);
3096
3097 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3098 /* If vxlan->dev is in the same netns, it has already been added
3099 * to the list by the previous loop.
3100 */
3101 if (!net_eq(dev_net(vxlan->dev), net))
John W. Linville13c3ed62015-05-18 13:51:24 -04003102 unregister_netdevice_queue(vxlan->dev, &list);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003103 }
3104
3105 unregister_netdevice_many(&list);
3106 rtnl_unlock();
3107}
3108
stephen hemmingerd3428942012-10-01 12:32:35 +00003109static struct pernet_operations vxlan_net_ops = {
3110 .init = vxlan_init_net,
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003111 .exit = vxlan_exit_net,
stephen hemmingerd3428942012-10-01 12:32:35 +00003112 .id = &vxlan_net_id,
3113 .size = sizeof(struct vxlan_net),
3114};
3115
3116static int __init vxlan_init_module(void)
3117{
3118 int rc;
3119
Stephen Hemminger758c57d2013-06-17 14:16:09 -07003120 vxlan_wq = alloc_workqueue("vxlan", 0, 0);
3121 if (!vxlan_wq)
3122 return -ENOMEM;
3123
stephen hemmingerd3428942012-10-01 12:32:35 +00003124 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3125
Daniel Borkmann783c1462014-01-22 21:07:53 +01003126 rc = register_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00003127 if (rc)
3128 goto out1;
3129
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003130 rc = register_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00003131 if (rc)
3132 goto out2;
3133
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003134 rc = rtnl_link_register(&vxlan_link_ops);
3135 if (rc)
3136 goto out3;
stephen hemmingerd3428942012-10-01 12:32:35 +00003137
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003138 return 0;
3139out3:
3140 unregister_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00003141out2:
Daniel Borkmann783c1462014-01-22 21:07:53 +01003142 unregister_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00003143out1:
Stephen Hemminger758c57d2013-06-17 14:16:09 -07003144 destroy_workqueue(vxlan_wq);
stephen hemmingerd3428942012-10-01 12:32:35 +00003145 return rc;
3146}
Cong Wang7332a132013-05-27 22:35:53 +00003147late_initcall(vxlan_init_module);
stephen hemmingerd3428942012-10-01 12:32:35 +00003148
3149static void __exit vxlan_cleanup_module(void)
3150{
Stephen Hemmingerb7153982013-06-17 14:16:09 -07003151 rtnl_link_unregister(&vxlan_link_ops);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003152 unregister_netdevice_notifier(&vxlan_notifier_block);
Stephen Hemminger758c57d2013-06-17 14:16:09 -07003153 destroy_workqueue(vxlan_wq);
Daniel Borkmann783c1462014-01-22 21:07:53 +01003154 unregister_pernet_subsys(&vxlan_net_ops);
3155 /* rcu_barrier() is called by netns */
stephen hemmingerd3428942012-10-01 12:32:35 +00003156}
3157module_exit(vxlan_cleanup_module);
3158
3159MODULE_LICENSE("GPL");
3160MODULE_VERSION(VXLAN_VERSION);
stephen hemminger3b8df3c2013-04-27 11:31:52 +00003161MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
Jesse Brandeburgead51392014-01-17 11:00:33 -08003162MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
stephen hemmingerd3428942012-10-01 12:32:35 +00003163MODULE_ALIAS_RTNL_LINK("vxlan");