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stephen hemmingerd3428942012-10-01 12:32:35 +00001/*
Rami Roseneb5ce432012-11-13 13:29:15 +00002 * VXLAN: Virtual eXtensible Local Area Network
stephen hemmingerd3428942012-10-01 12:32:35 +00003 *
stephen hemminger3b8df3c2013-04-27 11:31:52 +00004 * Copyright (c) 2012-2013 Vyatta Inc.
stephen hemmingerd3428942012-10-01 12:32:35 +00005 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
stephen hemmingerd3428942012-10-01 12:32:35 +00009 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <linux/kernel.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000014#include <linux/module.h>
15#include <linux/errno.h>
16#include <linux/slab.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000017#include <linux/udp.h>
18#include <linux/igmp.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000019#include <linux/if_ether.h>
Yan Burman1b13c972013-01-29 23:43:07 +000020#include <linux/ethtool.h>
David Stevense4f67ad2012-11-20 02:50:14 +000021#include <net/arp.h>
22#include <net/ndisc.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000023#include <net/ip.h>
24#include <net/icmp.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000025#include <net/rtnetlink.h>
stephen hemmingerd3428942012-10-01 12:32:35 +000026#include <net/inet_ecn.h>
27#include <net/net_namespace.h>
28#include <net/netns/generic.h>
Jiri Bencfa20e0e2017-08-28 21:43:22 +020029#include <net/tun_proto.h>
Pravin B Shelar012a5722013-08-19 11:23:07 -070030#include <net/vxlan.h>
stephen hemminger40d29af2016-02-09 22:07:29 -080031
Cong Wange4c7ed42013-08-31 13:44:33 +080032#if IS_ENABLED(CONFIG_IPV6)
Cong Wange4c7ed42013-08-31 13:44:33 +080033#include <net/ip6_tunnel.h>
Cong Wang660d98c2013-09-02 10:06:52 +080034#include <net/ip6_checksum.h>
Cong Wange4c7ed42013-08-31 13:44:33 +080035#endif
stephen hemmingerd3428942012-10-01 12:32:35 +000036
37#define VXLAN_VERSION "0.1"
38
stephen hemminger553675f2013-05-16 11:35:20 +000039#define PORT_HASH_BITS 8
40#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
stephen hemmingerd3428942012-10-01 12:32:35 +000041#define FDB_AGE_DEFAULT 300 /* 5 min */
42#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
43
stephen hemminger23c578b2013-04-27 11:31:53 +000044/* UDP port for VXLAN traffic.
45 * The IANA assigned port is 4789, but the Linux default is 8472
Stephen Hemminger234f5b72013-06-17 14:16:41 -070046 * for compatibility with early adopters.
stephen hemminger23c578b2013-04-27 11:31:53 +000047 */
Stephen Hemminger9daaa392013-06-17 14:16:12 -070048static unsigned short vxlan_port __read_mostly = 8472;
49module_param_named(udp_port, vxlan_port, ushort, 0444);
stephen hemmingerd3428942012-10-01 12:32:35 +000050MODULE_PARM_DESC(udp_port, "Destination UDP port");
51
52static bool log_ecn_error = true;
53module_param(log_ecn_error, bool, 0644);
54MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
55
Alexey Dobriyanc7d03a02016-11-17 04:58:21 +030056static unsigned int vxlan_net_id;
Thomas Graf0dfbdf42015-07-21 10:44:02 +020057static struct rtnl_link_ops vxlan_link_ops;
stephen hemminger553675f2013-05-16 11:35:20 +000058
Li RongQing7256eac2016-01-29 09:43:47 +080059static const u8 all_zeros_mac[ETH_ALEN + 2];
Mike Rapoportafbd8ba2013-06-25 16:01:51 +030060
Jiri Benc205f3562015-09-24 13:50:01 +020061static int vxlan_sock_add(struct vxlan_dev *vxlan);
Thomas Graf614732e2015-07-21 10:44:06 +020062
Mark Blocha53cb292017-06-02 03:24:08 +030063static void vxlan_vs_del_dev(struct vxlan_dev *vxlan);
64
stephen hemminger553675f2013-05-16 11:35:20 +000065/* per-network namespace private data for this module */
66struct vxlan_net {
67 struct list_head vxlan_list;
68 struct hlist_head sock_list[PORT_HASH_SIZE];
Stephen Hemminger1c51a912013-06-17 14:16:11 -070069 spinlock_t sock_lock;
stephen hemminger553675f2013-05-16 11:35:20 +000070};
71
stephen hemmingerd3428942012-10-01 12:32:35 +000072/* Forwarding table entry */
73struct vxlan_fdb {
74 struct hlist_node hlist; /* linked list of entries */
75 struct rcu_head rcu;
76 unsigned long updated; /* jiffies */
77 unsigned long used;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -070078 struct list_head remotes;
Sowmini Varadhan7177a3b2015-07-20 09:54:50 +020079 u8 eth_addr[ETH_ALEN];
stephen hemmingerd3428942012-10-01 12:32:35 +000080 u16 state; /* see ndm_state */
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -080081 __be32 vni;
David Stevensae884082013-04-19 00:36:26 +000082 u8 flags; /* see ndm_flags */
stephen hemmingerd3428942012-10-01 12:32:35 +000083};
84
stephen hemmingerd3428942012-10-01 12:32:35 +000085/* salt for hash table */
86static u32 vxlan_salt __read_mostly;
87
Thomas Grafee122c72015-07-21 10:43:58 +020088static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
89{
Thomas Grafe7030872015-07-21 10:44:01 +020090 return vs->flags & VXLAN_F_COLLECT_METADATA ||
91 ip_tunnel_collect_metadata();
Thomas Grafee122c72015-07-21 10:43:58 +020092}
93
Cong Wange4c7ed42013-08-31 13:44:33 +080094#if IS_ENABLED(CONFIG_IPV6)
95static inline
96bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
97{
Jiri Bencf0ef3122015-03-29 16:17:37 +020098 if (a->sa.sa_family != b->sa.sa_family)
99 return false;
100 if (a->sa.sa_family == AF_INET6)
101 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
102 else
103 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
Cong Wange4c7ed42013-08-31 13:44:33 +0800104}
105
Cong Wange4c7ed42013-08-31 13:44:33 +0800106static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
107{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200108 if (nla_len(nla) >= sizeof(struct in6_addr)) {
Jiri Benc67b61f62015-03-29 16:59:26 +0200109 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200110 ip->sa.sa_family = AF_INET6;
111 return 0;
112 } else if (nla_len(nla) >= sizeof(__be32)) {
Jiri Benc67b61f62015-03-29 16:59:26 +0200113 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200114 ip->sa.sa_family = AF_INET;
115 return 0;
116 } else {
117 return -EAFNOSUPPORT;
118 }
Cong Wange4c7ed42013-08-31 13:44:33 +0800119}
120
121static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
Jiri Bencf0ef3122015-03-29 16:17:37 +0200122 const union vxlan_addr *ip)
Cong Wange4c7ed42013-08-31 13:44:33 +0800123{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200124 if (ip->sa.sa_family == AF_INET6)
Jiri Benc930345e2015-03-29 16:59:25 +0200125 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200126 else
Jiri Benc930345e2015-03-29 16:59:25 +0200127 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
Cong Wange4c7ed42013-08-31 13:44:33 +0800128}
129
130#else /* !CONFIG_IPV6 */
131
132static inline
133bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
134{
Jiri Bencf0ef3122015-03-29 16:17:37 +0200135 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
Cong Wange4c7ed42013-08-31 13:44:33 +0800136}
137
Cong Wange4c7ed42013-08-31 13:44:33 +0800138static 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)) {
141 return -EAFNOSUPPORT;
142 } else if (nla_len(nla) >= sizeof(__be32)) {
Jiri Benc67b61f62015-03-29 16:59:26 +0200143 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
Jiri Bencf0ef3122015-03-29 16:17:37 +0200144 ip->sa.sa_family = AF_INET;
145 return 0;
146 } else {
147 return -EAFNOSUPPORT;
148 }
Cong Wange4c7ed42013-08-31 13:44:33 +0800149}
150
151static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
Jiri Bencf0ef3122015-03-29 16:17:37 +0200152 const union vxlan_addr *ip)
Cong Wange4c7ed42013-08-31 13:44:33 +0800153{
Jiri Benc930345e2015-03-29 16:59:25 +0200154 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
Cong Wange4c7ed42013-08-31 13:44:33 +0800155}
156#endif
157
stephen hemminger553675f2013-05-16 11:35:20 +0000158/* Virtual Network hash table head */
Jiri Benc54bfd872016-02-16 21:58:58 +0100159static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni)
stephen hemminger553675f2013-05-16 11:35:20 +0000160{
Jiri Benc54bfd872016-02-16 21:58:58 +0100161 return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)];
stephen hemminger553675f2013-05-16 11:35:20 +0000162}
163
164/* Socket hash table head */
165static inline struct hlist_head *vs_head(struct net *net, __be16 port)
stephen hemmingerd3428942012-10-01 12:32:35 +0000166{
167 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
168
stephen hemminger553675f2013-05-16 11:35:20 +0000169 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
170}
171
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700172/* First remote destination for a forwarding entry.
173 * Guaranteed to be non-NULL because remotes are never deleted.
174 */
stephen hemminger5ca54612013-08-04 17:17:39 -0700175static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700176{
stephen hemminger5ca54612013-08-04 17:17:39 -0700177 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
178}
179
180static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
181{
182 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700183}
184
Thomas Grafac5132d2015-01-15 03:53:56 +0100185/* Find VXLAN socket based on network namespace, address family and UDP port
186 * and enabled unshareable flags.
187 */
188static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
189 __be16 port, u32 flags)
stephen hemminger553675f2013-05-16 11:35:20 +0000190{
191 struct vxlan_sock *vs;
Tom Herbertaf33c1a2015-01-20 11:23:05 -0800192
193 flags &= VXLAN_F_RCV_FLAGS;
stephen hemminger553675f2013-05-16 11:35:20 +0000194
195 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
Marcelo Leitner19ca9fc2014-11-13 14:43:08 -0200196 if (inet_sk(vs->sock->sk)->inet_sport == port &&
Jiri Benc705cc622015-08-20 13:56:28 +0200197 vxlan_get_sk_family(vs) == family &&
Tom Herbertaf33c1a2015-01-20 11:23:05 -0800198 vs->flags == flags)
stephen hemminger553675f2013-05-16 11:35:20 +0000199 return vs;
200 }
201 return NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +0000202}
203
Matthias Schiffer49f810f2017-06-19 10:04:00 +0200204static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, int ifindex,
205 __be32 vni)
stephen hemmingerd3428942012-10-01 12:32:35 +0000206{
Jiri Benc69e76662017-07-02 19:00:57 +0200207 struct vxlan_dev_node *node;
stephen hemmingerd3428942012-10-01 12:32:35 +0000208
Jiri Bencb9167b22016-02-16 21:59:03 +0100209 /* For flow based devices, map all packets to VNI 0 */
210 if (vs->flags & VXLAN_F_COLLECT_METADATA)
211 vni = 0;
212
Jiri Benc69e76662017-07-02 19:00:57 +0200213 hlist_for_each_entry_rcu(node, vni_head(vs, vni), hlist) {
214 if (node->vxlan->default_dst.remote_vni != vni)
Matthias Schiffer49f810f2017-06-19 10:04:00 +0200215 continue;
216
217 if (IS_ENABLED(CONFIG_IPV6)) {
Jiri Benc69e76662017-07-02 19:00:57 +0200218 const struct vxlan_config *cfg = &node->vxlan->cfg;
Matthias Schiffer49f810f2017-06-19 10:04:00 +0200219
220 if ((cfg->flags & VXLAN_F_IPV6_LINKLOCAL) &&
221 cfg->remote_ifindex != ifindex)
222 continue;
223 }
224
Jiri Benc69e76662017-07-02 19:00:57 +0200225 return node->vxlan;
stephen hemmingerd3428942012-10-01 12:32:35 +0000226 }
227
228 return NULL;
229}
230
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700231/* Look up VNI in a per net namespace table */
Matthias Schiffer49f810f2017-06-19 10:04:00 +0200232static struct vxlan_dev *vxlan_find_vni(struct net *net, int ifindex,
233 __be32 vni, sa_family_t family,
234 __be16 port, u32 flags)
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700235{
236 struct vxlan_sock *vs;
237
Thomas Grafac5132d2015-01-15 03:53:56 +0100238 vs = vxlan_find_sock(net, family, port, flags);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700239 if (!vs)
240 return NULL;
241
Matthias Schiffer49f810f2017-06-19 10:04:00 +0200242 return vxlan_vs_find_vni(vs, ifindex, vni);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -0700243}
244
stephen hemmingerd3428942012-10-01 12:32:35 +0000245/* Fill in neighbour message in skbuff. */
246static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
Stephen Hemminger234f5b72013-06-17 14:16:41 -0700247 const struct vxlan_fdb *fdb,
248 u32 portid, u32 seq, int type, unsigned int flags,
249 const struct vxlan_rdst *rdst)
stephen hemmingerd3428942012-10-01 12:32:35 +0000250{
251 unsigned long now = jiffies;
252 struct nda_cacheinfo ci;
253 struct nlmsghdr *nlh;
254 struct ndmsg *ndm;
David Stevense4f67ad2012-11-20 02:50:14 +0000255 bool send_ip, send_eth;
stephen hemmingerd3428942012-10-01 12:32:35 +0000256
257 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
258 if (nlh == NULL)
259 return -EMSGSIZE;
260
261 ndm = nlmsg_data(nlh);
262 memset(ndm, 0, sizeof(*ndm));
David Stevense4f67ad2012-11-20 02:50:14 +0000263
264 send_eth = send_ip = true;
265
266 if (type == RTM_GETNEIGH) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800267 send_ip = !vxlan_addr_any(&rdst->remote_ip);
David Stevense4f67ad2012-11-20 02:50:14 +0000268 send_eth = !is_zero_ether_addr(fdb->eth_addr);
Vincent Bernat8f48ba72017-03-10 16:30:24 +0100269 ndm->ndm_family = send_ip ? rdst->remote_ip.sa.sa_family : AF_INET;
David Stevense4f67ad2012-11-20 02:50:14 +0000270 } else
271 ndm->ndm_family = AF_BRIDGE;
stephen hemmingerd3428942012-10-01 12:32:35 +0000272 ndm->ndm_state = fdb->state;
273 ndm->ndm_ifindex = vxlan->dev->ifindex;
David Stevensae884082013-04-19 00:36:26 +0000274 ndm->ndm_flags = fdb->flags;
Petr Machata0efe1172018-10-17 08:53:26 +0000275 if (rdst->offloaded)
276 ndm->ndm_flags |= NTF_OFFLOADED;
Jun Zhao545469f2014-07-26 00:38:59 +0800277 ndm->ndm_type = RTN_UNICAST;
stephen hemmingerd3428942012-10-01 12:32:35 +0000278
Nicolas Dichtel193523b2015-01-20 15:15:47 +0100279 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
Nicolas Dichtel49670822015-01-26 14:10:53 +0100280 nla_put_s32(skb, NDA_LINK_NETNSID,
WANG Cong38f507f2016-09-01 21:53:44 -0700281 peernet2id(dev_net(vxlan->dev), vxlan->net)))
Nicolas Dichtel193523b2015-01-20 15:15:47 +0100282 goto nla_put_failure;
283
David Stevense4f67ad2012-11-20 02:50:14 +0000284 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
stephen hemmingerd3428942012-10-01 12:32:35 +0000285 goto nla_put_failure;
286
Cong Wange4c7ed42013-08-31 13:44:33 +0800287 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
David Stevens66817122013-03-15 04:35:51 +0000288 goto nla_put_failure;
289
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200290 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
David Stevens66817122013-03-15 04:35:51 +0000291 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
292 goto nla_put_failure;
Atzm Watanabec7995c42013-04-16 02:50:52 +0000293 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
Jiri Benc54bfd872016-02-16 21:58:58 +0100294 nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni)))
David Stevens66817122013-03-15 04:35:51 +0000295 goto nla_put_failure;
Matthias Schifferdc5321d2017-06-19 10:03:56 +0200296 if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && fdb->vni &&
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800297 nla_put_u32(skb, NDA_SRC_VNI,
298 be32_to_cpu(fdb->vni)))
299 goto nla_put_failure;
David Stevens66817122013-03-15 04:35:51 +0000300 if (rdst->remote_ifindex &&
301 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
stephen hemmingerd3428942012-10-01 12:32:35 +0000302 goto nla_put_failure;
303
304 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
305 ci.ndm_confirmed = 0;
306 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
307 ci.ndm_refcnt = 0;
308
309 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
310 goto nla_put_failure;
311
Johannes Berg053c0952015-01-16 22:09:00 +0100312 nlmsg_end(skb, nlh);
313 return 0;
stephen hemmingerd3428942012-10-01 12:32:35 +0000314
315nla_put_failure:
316 nlmsg_cancel(skb, nlh);
317 return -EMSGSIZE;
318}
319
320static inline size_t vxlan_nlmsg_size(void)
321{
322 return NLMSG_ALIGN(sizeof(struct ndmsg))
323 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
Cong Wange4c7ed42013-08-31 13:44:33 +0800324 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
stephen hemminger73cf3312013-04-27 11:31:54 +0000325 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
David Stevens66817122013-03-15 04:35:51 +0000326 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
327 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
Nicolas Dichtel49670822015-01-26 14:10:53 +0100328 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
stephen hemmingerd3428942012-10-01 12:32:35 +0000329 + nla_total_size(sizeof(struct nda_cacheinfo));
330}
331
Petr Machata9a997352018-10-17 08:53:22 +0000332static void __vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
333 struct vxlan_rdst *rd, int type)
stephen hemmingerd3428942012-10-01 12:32:35 +0000334{
335 struct net *net = dev_net(vxlan->dev);
336 struct sk_buff *skb;
337 int err = -ENOBUFS;
338
339 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
340 if (skb == NULL)
341 goto errout;
342
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200343 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
stephen hemmingerd3428942012-10-01 12:32:35 +0000344 if (err < 0) {
345 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
346 WARN_ON(err == -EMSGSIZE);
347 kfree_skb(skb);
348 goto errout;
349 }
350
351 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
352 return;
353errout:
354 if (err < 0)
355 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
356}
357
Petr Machata9a997352018-10-17 08:53:22 +0000358static void vxlan_fdb_switchdev_call_notifiers(struct vxlan_dev *vxlan,
359 struct vxlan_fdb *fdb,
360 struct vxlan_rdst *rd,
361 bool adding)
362{
363 struct switchdev_notifier_vxlan_fdb_info info;
364 enum switchdev_notifier_type notifier_type;
365
366 if (WARN_ON(!rd))
367 return;
368
369 notifier_type = adding ? SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE
370 : SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE;
371
372 info = (struct switchdev_notifier_vxlan_fdb_info){
373 .remote_ip = rd->remote_ip,
374 .remote_port = rd->remote_port,
375 .remote_vni = rd->remote_vni,
376 .remote_ifindex = rd->remote_ifindex,
377 .vni = fdb->vni,
Petr Machata0efe1172018-10-17 08:53:26 +0000378 .offloaded = rd->offloaded,
Petr Machata9a997352018-10-17 08:53:22 +0000379 };
380 memcpy(info.eth_addr, fdb->eth_addr, ETH_ALEN);
381
382 call_switchdev_notifiers(notifier_type, vxlan->dev,
383 &info.info);
384}
385
386static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
387 struct vxlan_rdst *rd, int type)
388{
389 switch (type) {
390 case RTM_NEWNEIGH:
391 vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd, true);
392 break;
393 case RTM_DELNEIGH:
394 vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd, false);
395 break;
396 }
397
398 __vxlan_fdb_notify(vxlan, fdb, rd, type);
399}
400
Cong Wange4c7ed42013-08-31 13:44:33 +0800401static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
David Stevense4f67ad2012-11-20 02:50:14 +0000402{
403 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700404 struct vxlan_fdb f = {
405 .state = NUD_STALE,
406 };
407 struct vxlan_rdst remote = {
Cong Wange4c7ed42013-08-31 13:44:33 +0800408 .remote_ip = *ipa, /* goes to NDA_DST */
Jiri Benc54bfd872016-02-16 21:58:58 +0100409 .remote_vni = cpu_to_be32(VXLAN_N_VID),
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700410 };
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700411
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200412 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
David Stevense4f67ad2012-11-20 02:50:14 +0000413}
414
415static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
416{
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700417 struct vxlan_fdb f = {
418 .state = NUD_STALE,
419 };
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200420 struct vxlan_rdst remote = { };
David Stevense4f67ad2012-11-20 02:50:14 +0000421
David Stevense4f67ad2012-11-20 02:50:14 +0000422 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
423
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200424 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
David Stevense4f67ad2012-11-20 02:50:14 +0000425}
426
stephen hemmingerd3428942012-10-01 12:32:35 +0000427/* Hash Ethernet address */
428static u32 eth_hash(const unsigned char *addr)
429{
430 u64 value = get_unaligned((u64 *)addr);
431
432 /* only want 6 bytes */
433#ifdef __BIG_ENDIAN
stephen hemmingerd3428942012-10-01 12:32:35 +0000434 value >>= 16;
stephen hemminger321fb992012-10-09 20:35:47 +0000435#else
436 value <<= 16;
stephen hemmingerd3428942012-10-01 12:32:35 +0000437#endif
438 return hash_64(value, FDB_HASH_BITS);
439}
440
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800441static u32 eth_vni_hash(const unsigned char *addr, __be32 vni)
442{
443 /* use 1 byte of OUI and 3 bytes of NIC */
444 u32 key = get_unaligned((u32 *)(addr + 2));
445
446 return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1);
447}
448
stephen hemmingerd3428942012-10-01 12:32:35 +0000449/* Hash chain to use given mac address */
450static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800451 const u8 *mac, __be32 vni)
stephen hemmingerd3428942012-10-01 12:32:35 +0000452{
Matthias Schifferdc5321d2017-06-19 10:03:56 +0200453 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800454 return &vxlan->fdb_head[eth_vni_hash(mac, vni)];
455 else
456 return &vxlan->fdb_head[eth_hash(mac)];
stephen hemmingerd3428942012-10-01 12:32:35 +0000457}
458
459/* Look up Ethernet address in forwarding table */
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000460static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800461 const u8 *mac, __be32 vni)
stephen hemmingerd3428942012-10-01 12:32:35 +0000462{
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800463 struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni);
stephen hemmingerd3428942012-10-01 12:32:35 +0000464 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000465
Sasha Levinb67bfe02013-02-27 17:06:00 -0800466 hlist_for_each_entry_rcu(f, head, hlist) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800467 if (ether_addr_equal(mac, f->eth_addr)) {
Matthias Schifferdc5321d2017-06-19 10:03:56 +0200468 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800469 if (vni == f->vni)
470 return f;
471 } else {
472 return f;
473 }
474 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000475 }
476
477 return NULL;
478}
479
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000480static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800481 const u8 *mac, __be32 vni)
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000482{
483 struct vxlan_fdb *f;
484
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800485 f = __vxlan_find_mac(vxlan, mac, vni);
Li RongQing016f3d12018-08-29 11:52:10 +0800486 if (f && f->used != jiffies)
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000487 f->used = jiffies;
488
489 return f;
490}
491
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300492/* caller should hold vxlan->hash_lock */
493static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
Cong Wange4c7ed42013-08-31 13:44:33 +0800494 union vxlan_addr *ip, __be16 port,
Jiri Benc54bfd872016-02-16 21:58:58 +0100495 __be32 vni, __u32 ifindex)
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300496{
497 struct vxlan_rdst *rd;
498
499 list_for_each_entry(rd, &f->remotes, list) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800500 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300501 rd->remote_port == port &&
502 rd->remote_vni == vni &&
503 rd->remote_ifindex == ifindex)
504 return rd;
505 }
506
507 return NULL;
508}
509
Petr Machata1941f1d2018-10-17 08:53:24 +0000510int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
511 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
512{
513 struct vxlan_dev *vxlan = netdev_priv(dev);
514 u8 eth_addr[ETH_ALEN + 2] = { 0 };
515 struct vxlan_rdst *rdst;
516 struct vxlan_fdb *f;
517 int rc = 0;
518
519 if (is_multicast_ether_addr(mac) ||
520 is_zero_ether_addr(mac))
521 return -EINVAL;
522
523 ether_addr_copy(eth_addr, mac);
524
525 rcu_read_lock();
526
527 f = __vxlan_find_mac(vxlan, eth_addr, vni);
528 if (!f) {
529 rc = -ENOENT;
530 goto out;
531 }
532
533 rdst = first_remote_rcu(f);
534
535 memset(fdb_info, 0, sizeof(*fdb_info));
536 fdb_info->info.dev = dev;
537 fdb_info->remote_ip = rdst->remote_ip;
538 fdb_info->remote_port = rdst->remote_port;
539 fdb_info->remote_vni = rdst->remote_vni;
540 fdb_info->remote_ifindex = rdst->remote_ifindex;
541 fdb_info->vni = vni;
Petr Machata0efe1172018-10-17 08:53:26 +0000542 fdb_info->offloaded = rdst->offloaded;
Petr Machata1941f1d2018-10-17 08:53:24 +0000543 ether_addr_copy(fdb_info->eth_addr, mac);
544
545out:
546 rcu_read_unlock();
547 return rc;
548}
549EXPORT_SYMBOL_GPL(vxlan_fdb_find_uc);
550
Thomas Richter906dc182013-07-19 17:20:07 +0200551/* Replace destination of unicast mac */
552static int vxlan_fdb_replace(struct vxlan_fdb *f,
Jiri Benc54bfd872016-02-16 21:58:58 +0100553 union vxlan_addr *ip, __be16 port, __be32 vni,
554 __u32 ifindex)
Thomas Richter906dc182013-07-19 17:20:07 +0200555{
556 struct vxlan_rdst *rd;
557
558 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
559 if (rd)
560 return 0;
561
562 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
563 if (!rd)
564 return 0;
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100565
566 dst_cache_reset(&rd->dst_cache);
Cong Wange4c7ed42013-08-31 13:44:33 +0800567 rd->remote_ip = *ip;
Thomas Richter906dc182013-07-19 17:20:07 +0200568 rd->remote_port = port;
569 rd->remote_vni = vni;
570 rd->remote_ifindex = ifindex;
571 return 1;
572}
573
David Stevens66817122013-03-15 04:35:51 +0000574/* Add/update destinations for multicast */
575static int vxlan_fdb_append(struct vxlan_fdb *f,
Jiri Benc54bfd872016-02-16 21:58:58 +0100576 union vxlan_addr *ip, __be16 port, __be32 vni,
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200577 __u32 ifindex, struct vxlan_rdst **rdp)
David Stevens66817122013-03-15 04:35:51 +0000578{
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700579 struct vxlan_rdst *rd;
David Stevens66817122013-03-15 04:35:51 +0000580
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300581 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
582 if (rd)
583 return 0;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700584
David Stevens66817122013-03-15 04:35:51 +0000585 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
586 if (rd == NULL)
587 return -ENOBUFS;
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100588
589 if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) {
590 kfree(rd);
591 return -ENOBUFS;
592 }
593
Cong Wange4c7ed42013-08-31 13:44:33 +0800594 rd->remote_ip = *ip;
David Stevens66817122013-03-15 04:35:51 +0000595 rd->remote_port = port;
Petr Machata0efe1172018-10-17 08:53:26 +0000596 rd->offloaded = false;
David Stevens66817122013-03-15 04:35:51 +0000597 rd->remote_vni = vni;
598 rd->remote_ifindex = ifindex;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700599
600 list_add_tail_rcu(&rd->list, &f->remotes);
601
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200602 *rdp = rd;
David Stevens66817122013-03-15 04:35:51 +0000603 return 1;
604}
605
Tom Herbertdfd86452015-01-12 17:00:38 -0800606static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
607 unsigned int off,
608 struct vxlanhdr *vh, size_t hdrlen,
Jiri Benc54bfd872016-02-16 21:58:58 +0100609 __be32 vni_field,
610 struct gro_remcsum *grc,
Tom Herbert0ace2ca2015-02-10 16:30:32 -0800611 bool nopartial)
Tom Herbertdfd86452015-01-12 17:00:38 -0800612{
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700613 size_t start, offset;
Tom Herbertdfd86452015-01-12 17:00:38 -0800614
615 if (skb->remcsum_offload)
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700616 return vh;
Tom Herbertdfd86452015-01-12 17:00:38 -0800617
618 if (!NAPI_GRO_CB(skb)->csum_valid)
619 return NULL;
620
Jiri Benc54bfd872016-02-16 21:58:58 +0100621 start = vxlan_rco_start(vni_field);
622 offset = start + vxlan_rco_offset(vni_field);
Tom Herbertdfd86452015-01-12 17:00:38 -0800623
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700624 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
625 start, offset, grc, nopartial);
Tom Herbertdfd86452015-01-12 17:00:38 -0800626
627 skb->remcsum_offload = 1;
628
629 return vh;
630}
631
David Millerd4546c22018-06-24 14:13:49 +0900632static struct sk_buff *vxlan_gro_receive(struct sock *sk,
633 struct list_head *head,
634 struct sk_buff *skb)
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200635{
David Millerd4546c22018-06-24 14:13:49 +0900636 struct sk_buff *pp = NULL;
637 struct sk_buff *p;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200638 struct vxlanhdr *vh, *vh2;
Jesse Gross9b174d82014-12-30 19:10:15 -0800639 unsigned int hlen, off_vx;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200640 int flush = 1;
Tom Herbert5602c482016-04-05 08:22:53 -0700641 struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk);
Jiri Benc54bfd872016-02-16 21:58:58 +0100642 __be32 flags;
Tom Herbert26c4f7d2015-02-10 16:30:27 -0800643 struct gro_remcsum grc;
644
645 skb_gro_remcsum_init(&grc);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200646
647 off_vx = skb_gro_offset(skb);
648 hlen = off_vx + sizeof(*vh);
649 vh = skb_gro_header_fast(skb, off_vx);
650 if (skb_gro_header_hard(skb, hlen)) {
651 vh = skb_gro_header_slow(skb, hlen, off_vx);
652 if (unlikely(!vh))
653 goto out;
654 }
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200655
Tom Herbertdfd86452015-01-12 17:00:38 -0800656 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
657
Jiri Benc54bfd872016-02-16 21:58:58 +0100658 flags = vh->vx_flags;
Tom Herbertdfd86452015-01-12 17:00:38 -0800659
660 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
661 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
Jiri Benc54bfd872016-02-16 21:58:58 +0100662 vh->vx_vni, &grc,
Tom Herbert0ace2ca2015-02-10 16:30:32 -0800663 !!(vs->flags &
664 VXLAN_F_REMCSUM_NOPARTIAL));
Tom Herbertdfd86452015-01-12 17:00:38 -0800665
666 if (!vh)
667 goto out;
668 }
669
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700670 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
671
David Millerd4546c22018-06-24 14:13:49 +0900672 list_for_each_entry(p, head, list) {
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200673 if (!NAPI_GRO_CB(p)->same_flow)
674 continue;
675
676 vh2 = (struct vxlanhdr *)(p->data + off_vx);
Thomas Graf35114942015-01-15 03:53:55 +0100677 if (vh->vx_flags != vh2->vx_flags ||
678 vh->vx_vni != vh2->vx_vni) {
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200679 NAPI_GRO_CB(p)->same_flow = 0;
680 continue;
681 }
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200682 }
683
Sabrina Dubrocafcd91dd2016-10-20 15:58:02 +0200684 pp = call_gro_receive(eth_gro_receive, head, skb);
Alexander Duyckc194cf92016-03-09 09:24:23 -0800685 flush = 0;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200686
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200687out:
Sabrina Dubroca603d4cf2018-06-30 17:38:55 +0200688 skb_gro_flush_final_remcsum(skb, pp, flush, &grc);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200689
690 return pp;
691}
692
Tom Herbert5602c482016-04-05 08:22:53 -0700693static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff)
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200694{
Jarno Rajahalme229740c2016-05-03 16:10:21 -0700695 /* Sets 'skb->inner_mac_header' since we are always called with
696 * 'skb->encapsulation' set.
697 */
Jesse Gross9b174d82014-12-30 19:10:15 -0800698 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200699}
700
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700701static struct vxlan_fdb *vxlan_fdb_alloc(struct vxlan_dev *vxlan,
702 const u8 *mac, __u16 state,
703 __be32 src_vni, __u8 ndm_flags)
704{
705 struct vxlan_fdb *f;
706
707 f = kmalloc(sizeof(*f), GFP_ATOMIC);
708 if (!f)
709 return NULL;
710 f->state = state;
711 f->flags = ndm_flags;
712 f->updated = f->used = jiffies;
713 f->vni = src_vni;
714 INIT_LIST_HEAD(&f->remotes);
715 memcpy(f->eth_addr, mac, ETH_ALEN);
716
717 return f;
718}
719
stephen hemmingerd3428942012-10-01 12:32:35 +0000720static int vxlan_fdb_create(struct vxlan_dev *vxlan,
Cong Wange4c7ed42013-08-31 13:44:33 +0800721 const u8 *mac, union vxlan_addr *ip,
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700722 __u16 state, __be16 port, __be32 src_vni,
723 __be32 vni, __u32 ifindex, __u8 ndm_flags,
724 struct vxlan_fdb **fdb)
725{
726 struct vxlan_rdst *rd = NULL;
727 struct vxlan_fdb *f;
728 int rc;
729
730 if (vxlan->cfg.addrmax &&
731 vxlan->addrcnt >= vxlan->cfg.addrmax)
732 return -ENOSPC;
733
734 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
735 f = vxlan_fdb_alloc(vxlan, mac, state, src_vni, ndm_flags);
736 if (!f)
737 return -ENOMEM;
738
739 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
740 if (rc < 0) {
741 kfree(f);
742 return rc;
743 }
744
745 ++vxlan->addrcnt;
746 hlist_add_head_rcu(&f->hlist,
747 vxlan_fdb_head(vxlan, mac, src_vni));
748
749 *fdb = f;
750
751 return 0;
752}
753
754/* Add new entry to forwarding table -- assumes lock held */
755static int vxlan_fdb_update(struct vxlan_dev *vxlan,
756 const u8 *mac, union vxlan_addr *ip,
David Stevens66817122013-03-15 04:35:51 +0000757 __u16 state, __u16 flags,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800758 __be16 port, __be32 src_vni, __be32 vni,
759 __u32 ifindex, __u8 ndm_flags)
stephen hemmingerd3428942012-10-01 12:32:35 +0000760{
Roopa Prabhu0813e952018-10-11 12:35:13 -0700761 __u8 fdb_flags = (ndm_flags & ~NTF_USE);
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200762 struct vxlan_rdst *rd = NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +0000763 struct vxlan_fdb *f;
764 int notify = 0;
Haishuang Yan17b46362016-11-29 09:59:36 +0800765 int rc;
stephen hemmingerd3428942012-10-01 12:32:35 +0000766
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800767 f = __vxlan_find_mac(vxlan, mac, src_vni);
stephen hemmingerd3428942012-10-01 12:32:35 +0000768 if (f) {
769 if (flags & NLM_F_EXCL) {
770 netdev_dbg(vxlan->dev,
771 "lost race to create %pM\n", mac);
772 return -EEXIST;
773 }
774 if (f->state != state) {
775 f->state = state;
776 f->updated = jiffies;
777 notify = 1;
778 }
Roopa Prabhu0813e952018-10-11 12:35:13 -0700779 if (f->flags != fdb_flags) {
780 f->flags = fdb_flags;
David Stevensae884082013-04-19 00:36:26 +0000781 f->updated = jiffies;
782 notify = 1;
783 }
Thomas Richter906dc182013-07-19 17:20:07 +0200784 if ((flags & NLM_F_REPLACE)) {
785 /* Only change unicasts */
786 if (!(is_multicast_ether_addr(f->eth_addr) ||
787 is_zero_ether_addr(f->eth_addr))) {
Li RongQing60840422015-04-22 15:49:10 +0800788 notify |= vxlan_fdb_replace(f, ip, port, vni,
Thomas Richter906dc182013-07-19 17:20:07 +0200789 ifindex);
Thomas Richter906dc182013-07-19 17:20:07 +0200790 } else
791 return -EOPNOTSUPP;
792 }
David Stevens66817122013-03-15 04:35:51 +0000793 if ((flags & NLM_F_APPEND) &&
Mike Rapoport58e4c762013-06-25 16:01:56 +0300794 (is_multicast_ether_addr(f->eth_addr) ||
795 is_zero_ether_addr(f->eth_addr))) {
Haishuang Yan17b46362016-11-29 09:59:36 +0800796 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
David Stevens66817122013-03-15 04:35:51 +0000797
798 if (rc < 0)
799 return rc;
800 notify |= rc;
801 }
Roopa Prabhu0813e952018-10-11 12:35:13 -0700802
803 if (ndm_flags & NTF_USE)
804 f->used = jiffies;
stephen hemmingerd3428942012-10-01 12:32:35 +0000805 } else {
806 if (!(flags & NLM_F_CREATE))
807 return -ENOENT;
808
Thomas Richter906dc182013-07-19 17:20:07 +0200809 /* Disallow replace to add a multicast entry */
810 if ((flags & NLM_F_REPLACE) &&
811 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
812 return -EOPNOTSUPP;
813
Cong Wange4c7ed42013-08-31 13:44:33 +0800814 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700815 rc = vxlan_fdb_create(vxlan, mac, ip, state, port, src_vni,
Roopa Prabhu0813e952018-10-11 12:35:13 -0700816 vni, ifindex, fdb_flags, &f);
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700817 if (rc < 0)
Haishuang Yan17b46362016-11-29 09:59:36 +0800818 return rc;
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700819 notify = 1;
stephen hemmingerd3428942012-10-01 12:32:35 +0000820 }
821
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200822 if (notify) {
823 if (rd == NULL)
824 rd = first_remote_rtnl(f);
825 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
826 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000827
828 return 0;
829}
830
Wei Yongjun6706c822013-04-11 19:00:35 +0000831static void vxlan_fdb_free(struct rcu_head *head)
David Stevens66817122013-03-15 04:35:51 +0000832{
833 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700834 struct vxlan_rdst *rd, *nd;
David Stevens66817122013-03-15 04:35:51 +0000835
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100836 list_for_each_entry_safe(rd, nd, &f->remotes, list) {
837 dst_cache_destroy(&rd->dst_cache);
David Stevens66817122013-03-15 04:35:51 +0000838 kfree(rd);
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100839 }
David Stevens66817122013-03-15 04:35:51 +0000840 kfree(f);
841}
842
Roopa Prabhu4c2438b2018-07-04 16:46:31 -0700843static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,
844 bool do_notify)
stephen hemmingerd3428942012-10-01 12:32:35 +0000845{
Petr Machata045a5a92018-10-17 08:53:27 +0000846 struct vxlan_rdst *rd;
847
stephen hemmingerd3428942012-10-01 12:32:35 +0000848 netdev_dbg(vxlan->dev,
849 "delete %pM\n", f->eth_addr);
850
851 --vxlan->addrcnt;
Roopa Prabhu4c2438b2018-07-04 16:46:31 -0700852 if (do_notify)
Petr Machata045a5a92018-10-17 08:53:27 +0000853 list_for_each_entry(rd, &f->remotes, list)
854 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
stephen hemmingerd3428942012-10-01 12:32:35 +0000855
856 hlist_del_rcu(&f->hlist);
David Stevens66817122013-03-15 04:35:51 +0000857 call_rcu(&f->rcu, vxlan_fdb_free);
stephen hemmingerd3428942012-10-01 12:32:35 +0000858}
859
Lance Richardson35cf2842017-05-29 13:25:57 -0400860static void vxlan_dst_free(struct rcu_head *head)
861{
862 struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu);
863
864 dst_cache_destroy(&rd->dst_cache);
865 kfree(rd);
866}
867
868static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,
869 struct vxlan_rdst *rd)
870{
871 list_del_rcu(&rd->list);
872 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
873 call_rcu(&rd->rcu, vxlan_dst_free);
874}
875
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300876static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800877 union vxlan_addr *ip, __be16 *port, __be32 *src_vni,
878 __be32 *vni, u32 *ifindex)
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300879{
880 struct net *net = dev_net(vxlan->dev);
Cong Wange4c7ed42013-08-31 13:44:33 +0800881 int err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300882
883 if (tb[NDA_DST]) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800884 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
885 if (err)
886 return err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300887 } else {
Cong Wange4c7ed42013-08-31 13:44:33 +0800888 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
889 if (remote->sa.sa_family == AF_INET) {
890 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
891 ip->sa.sa_family = AF_INET;
892#if IS_ENABLED(CONFIG_IPV6)
893 } else {
894 ip->sin6.sin6_addr = in6addr_any;
895 ip->sa.sa_family = AF_INET6;
896#endif
897 }
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300898 }
899
900 if (tb[NDA_PORT]) {
901 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
902 return -EINVAL;
903 *port = nla_get_be16(tb[NDA_PORT]);
904 } else {
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200905 *port = vxlan->cfg.dst_port;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300906 }
907
908 if (tb[NDA_VNI]) {
909 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
910 return -EINVAL;
Jiri Benc54bfd872016-02-16 21:58:58 +0100911 *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300912 } else {
913 *vni = vxlan->default_dst.remote_vni;
914 }
915
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800916 if (tb[NDA_SRC_VNI]) {
917 if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32))
918 return -EINVAL;
919 *src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI]));
920 } else {
921 *src_vni = vxlan->default_dst.remote_vni;
922 }
923
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300924 if (tb[NDA_IFINDEX]) {
925 struct net_device *tdev;
926
927 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
928 return -EINVAL;
929 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
Ying Xue73763942014-01-15 10:23:41 +0800930 tdev = __dev_get_by_index(net, *ifindex);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300931 if (!tdev)
932 return -EADDRNOTAVAIL;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300933 } else {
934 *ifindex = 0;
935 }
936
937 return 0;
938}
939
stephen hemmingerd3428942012-10-01 12:32:35 +0000940/* Add static entry (via netlink) */
941static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
942 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100943 const unsigned char *addr, u16 vid, u16 flags)
stephen hemmingerd3428942012-10-01 12:32:35 +0000944{
945 struct vxlan_dev *vxlan = netdev_priv(dev);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300946 /* struct net *net = dev_net(vxlan->dev); */
Cong Wange4c7ed42013-08-31 13:44:33 +0800947 union vxlan_addr ip;
stephen hemminger73cf3312013-04-27 11:31:54 +0000948 __be16 port;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800949 __be32 src_vni, vni;
Jiri Benc54bfd872016-02-16 21:58:58 +0100950 u32 ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +0000951 int err;
952
953 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
954 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
955 ndm->ndm_state);
956 return -EINVAL;
957 }
958
959 if (tb[NDA_DST] == NULL)
960 return -EINVAL;
961
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800962 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300963 if (err)
964 return err;
David Stevens66817122013-03-15 04:35:51 +0000965
Mike Rapoport5933a7b2014-04-01 09:23:01 +0300966 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
967 return -EAFNOSUPPORT;
968
stephen hemmingerd3428942012-10-01 12:32:35 +0000969 spin_lock_bh(&vxlan->hash_lock);
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700970 err = vxlan_fdb_update(vxlan, addr, &ip, ndm->ndm_state, flags,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800971 port, src_vni, vni, ifindex, ndm->ndm_flags);
stephen hemmingerd3428942012-10-01 12:32:35 +0000972 spin_unlock_bh(&vxlan->hash_lock);
973
974 return err;
975}
976
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800977static int __vxlan_fdb_delete(struct vxlan_dev *vxlan,
978 const unsigned char *addr, union vxlan_addr ip,
Xin Longfc39c382017-11-26 21:19:05 +0800979 __be16 port, __be32 src_vni, __be32 vni,
980 u32 ifindex, u16 vid)
stephen hemmingerd3428942012-10-01 12:32:35 +0000981{
stephen hemmingerd3428942012-10-01 12:32:35 +0000982 struct vxlan_fdb *f;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300983 struct vxlan_rdst *rd = NULL;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800984 int err = -ENOENT;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300985
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800986 f = vxlan_find_mac(vxlan, addr, src_vni);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300987 if (!f)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800988 return err;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300989
Cong Wange4c7ed42013-08-31 13:44:33 +0800990 if (!vxlan_addr_any(&ip)) {
991 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300992 if (!rd)
993 goto out;
stephen hemmingerd3428942012-10-01 12:32:35 +0000994 }
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300995
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300996 /* remove a destination if it's not the only one on the list,
997 * otherwise destroy the fdb entry
998 */
999 if (rd && !list_is_singular(&f->remotes)) {
Lance Richardson35cf2842017-05-29 13:25:57 -04001000 vxlan_fdb_dst_destroy(vxlan, f, rd);
Mike Rapoportbc7892b2013-06-25 16:01:54 +03001001 goto out;
1002 }
1003
Roopa Prabhu4c2438b2018-07-04 16:46:31 -07001004 vxlan_fdb_destroy(vxlan, f, true);
Mike Rapoportbc7892b2013-06-25 16:01:54 +03001005
1006out:
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001007 return 0;
1008}
1009
1010/* Delete entry (via netlink) */
1011static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
1012 struct net_device *dev,
1013 const unsigned char *addr, u16 vid)
1014{
1015 struct vxlan_dev *vxlan = netdev_priv(dev);
1016 union vxlan_addr ip;
1017 __be32 src_vni, vni;
1018 __be16 port;
1019 u32 ifindex;
1020 int err;
1021
1022 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex);
1023 if (err)
1024 return err;
1025
1026 spin_lock_bh(&vxlan->hash_lock);
1027 err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex,
1028 vid);
stephen hemmingerd3428942012-10-01 12:32:35 +00001029 spin_unlock_bh(&vxlan->hash_lock);
1030
1031 return err;
1032}
1033
1034/* Dump forwarding table */
1035static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
Jamal Hadi Salim5d5eacb2014-07-10 07:01:58 -04001036 struct net_device *dev,
Roopa Prabhud2976532016-08-30 21:56:45 -07001037 struct net_device *filter_dev, int *idx)
stephen hemmingerd3428942012-10-01 12:32:35 +00001038{
1039 struct vxlan_dev *vxlan = netdev_priv(dev);
1040 unsigned int h;
Roopa Prabhud2976532016-08-30 21:56:45 -07001041 int err = 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00001042
1043 for (h = 0; h < FDB_HASH_SIZE; ++h) {
1044 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +00001045
Sasha Levinb67bfe02013-02-27 17:06:00 -08001046 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
David Stevens66817122013-03-15 04:35:51 +00001047 struct vxlan_rdst *rd;
stephen hemmingerd3428942012-10-01 12:32:35 +00001048
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001049 list_for_each_entry_rcu(rd, &f->remotes, list) {
Roopa Prabhud2976532016-08-30 21:56:45 -07001050 if (*idx < cb->args[2])
Atzm Watanabe07a51cd2015-08-10 23:39:09 +09001051 goto skip;
1052
David Stevens66817122013-03-15 04:35:51 +00001053 err = vxlan_fdb_info(skb, vxlan, f,
1054 NETLINK_CB(cb->skb).portid,
1055 cb->nlh->nlmsg_seq,
1056 RTM_NEWNEIGH,
1057 NLM_F_MULTI, rd);
Roopa Prabhud2976532016-08-30 21:56:45 -07001058 if (err < 0)
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001059 goto out;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001060skip:
Roopa Prabhud2976532016-08-30 21:56:45 -07001061 *idx += 1;
Atzm Watanabe07a51cd2015-08-10 23:39:09 +09001062 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001063 }
1064 }
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001065out:
Roopa Prabhud2976532016-08-30 21:56:45 -07001066 return err;
stephen hemmingerd3428942012-10-01 12:32:35 +00001067}
1068
1069/* Watch incoming packets to learn mapping between Ethernet address
1070 * and Tunnel endpoint.
Simon Hormanc4b49512015-04-02 11:17:58 +09001071 * Return true if packet is bogus and should be dropped.
stephen hemmingerd3428942012-10-01 12:32:35 +00001072 */
stephen hemminger26a41ae62013-06-17 12:09:58 -07001073static bool vxlan_snoop(struct net_device *dev,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001074 union vxlan_addr *src_ip, const u8 *src_mac,
Matthias Schiffer87613de2017-06-19 10:03:59 +02001075 u32 src_ifindex, __be32 vni)
stephen hemmingerd3428942012-10-01 12:32:35 +00001076{
1077 struct vxlan_dev *vxlan = netdev_priv(dev);
1078 struct vxlan_fdb *f;
Matthias Schiffer87613de2017-06-19 10:03:59 +02001079 u32 ifindex = 0;
1080
1081#if IS_ENABLED(CONFIG_IPV6)
1082 if (src_ip->sa.sa_family == AF_INET6 &&
1083 (ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL))
1084 ifindex = src_ifindex;
1085#endif
stephen hemmingerd3428942012-10-01 12:32:35 +00001086
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001087 f = vxlan_find_mac(vxlan, src_mac, vni);
stephen hemmingerd3428942012-10-01 12:32:35 +00001088 if (likely(f)) {
stephen hemminger5ca54612013-08-04 17:17:39 -07001089 struct vxlan_rdst *rdst = first_remote_rcu(f);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001090
Matthias Schiffer87613de2017-06-19 10:03:59 +02001091 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) &&
1092 rdst->remote_ifindex == ifindex))
stephen hemminger26a41ae62013-06-17 12:09:58 -07001093 return false;
1094
1095 /* Don't migrate static entries, drop packets */
Roopa Prabhue0090a92017-06-11 16:32:50 -07001096 if (f->state & (NUD_PERMANENT | NUD_NOARP))
stephen hemminger26a41ae62013-06-17 12:09:58 -07001097 return true;
stephen hemmingerd3428942012-10-01 12:32:35 +00001098
1099 if (net_ratelimit())
1100 netdev_info(dev,
Cong Wange4c7ed42013-08-31 13:44:33 +08001101 "%pM migrated from %pIS to %pIS\n",
Rasmus Villemoesa4870f72015-02-07 03:17:31 +01001102 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
stephen hemmingerd3428942012-10-01 12:32:35 +00001103
Cong Wange4c7ed42013-08-31 13:44:33 +08001104 rdst->remote_ip = *src_ip;
stephen hemmingerd3428942012-10-01 12:32:35 +00001105 f->updated = jiffies;
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +02001106 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
stephen hemmingerd3428942012-10-01 12:32:35 +00001107 } else {
1108 /* learned new entry */
1109 spin_lock(&vxlan->hash_lock);
stephen hemminger3bf74b12013-06-17 12:09:57 -07001110
1111 /* close off race between vxlan_flush and incoming packets */
1112 if (netif_running(dev))
Roopa Prabhu25e20e72018-07-04 16:46:30 -07001113 vxlan_fdb_update(vxlan, src_mac, src_ip,
stephen hemminger3bf74b12013-06-17 12:09:57 -07001114 NUD_REACHABLE,
1115 NLM_F_EXCL|NLM_F_CREATE,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001116 vxlan->cfg.dst_port,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001117 vni,
stephen hemminger3bf74b12013-06-17 12:09:57 -07001118 vxlan->default_dst.remote_vni,
Matthias Schiffer87613de2017-06-19 10:03:59 +02001119 ifindex, NTF_SELF);
stephen hemmingerd3428942012-10-01 12:32:35 +00001120 spin_unlock(&vxlan->hash_lock);
1121 }
stephen hemminger26a41ae62013-06-17 12:09:58 -07001122
1123 return false;
stephen hemmingerd3428942012-10-01 12:32:35 +00001124}
1125
stephen hemmingerd3428942012-10-01 12:32:35 +00001126/* See if multicast group is already in use by other ID */
Gao feng95ab0992013-12-10 16:37:33 +08001127static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
stephen hemmingerd3428942012-10-01 12:32:35 +00001128{
stephen hemminger553675f2013-05-16 11:35:20 +00001129 struct vxlan_dev *vxlan;
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001130 struct vxlan_sock *sock4;
Arnd Bergmann4053ab12016-11-07 22:09:07 +01001131#if IS_ENABLED(CONFIG_IPV6)
1132 struct vxlan_sock *sock6;
1133#endif
Jiri Bencb1be00a2015-09-24 13:50:02 +02001134 unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
stephen hemmingerd3428942012-10-01 12:32:35 +00001135
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001136 sock4 = rtnl_dereference(dev->vn4_sock);
1137
Gao feng95ab0992013-12-10 16:37:33 +08001138 /* The vxlan_sock is only used by dev, leaving group has
1139 * no effect on other vxlan devices.
1140 */
Reshetova, Elena66af8462017-07-04 15:52:59 +03001141 if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1)
Gao feng95ab0992013-12-10 16:37:33 +08001142 return false;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001143#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001144 sock6 = rtnl_dereference(dev->vn6_sock);
Reshetova, Elena66af8462017-07-04 15:52:59 +03001145 if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1)
Jiri Bencb1be00a2015-09-24 13:50:02 +02001146 return false;
1147#endif
Gao feng95ab0992013-12-10 16:37:33 +08001148
stephen hemminger553675f2013-05-16 11:35:20 +00001149 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
Gao feng95ab0992013-12-10 16:37:33 +08001150 if (!netif_running(vxlan->dev) || vxlan == dev)
stephen hemminger553675f2013-05-16 11:35:20 +00001151 continue;
stephen hemmingerd3428942012-10-01 12:32:35 +00001152
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001153 if (family == AF_INET &&
1154 rtnl_dereference(vxlan->vn4_sock) != sock4)
Gao feng95ab0992013-12-10 16:37:33 +08001155 continue;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001156#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001157 if (family == AF_INET6 &&
1158 rtnl_dereference(vxlan->vn6_sock) != sock6)
Jiri Bencb1be00a2015-09-24 13:50:02 +02001159 continue;
1160#endif
Gao feng95ab0992013-12-10 16:37:33 +08001161
1162 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1163 &dev->default_dst.remote_ip))
1164 continue;
1165
1166 if (vxlan->default_dst.remote_ifindex !=
1167 dev->default_dst.remote_ifindex)
1168 continue;
1169
1170 return true;
stephen hemminger553675f2013-05-16 11:35:20 +00001171 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001172
1173 return false;
1174}
1175
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001176static bool __vxlan_sock_release_prep(struct vxlan_sock *vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001177{
Jiri Bencb1be00a2015-09-24 13:50:02 +02001178 struct vxlan_net *vn;
Pravin B Shelar012a5722013-08-19 11:23:07 -07001179
Jiri Bencb1be00a2015-09-24 13:50:02 +02001180 if (!vs)
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001181 return false;
Reshetova, Elena66af8462017-07-04 15:52:59 +03001182 if (!refcount_dec_and_test(&vs->refcnt))
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001183 return false;
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001184
Jiri Bencb1be00a2015-09-24 13:50:02 +02001185 vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001186 spin_lock(&vn->sock_lock);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001187 hlist_del_rcu(&vs->hlist);
Alexander Duycke7b3db52016-06-16 12:20:52 -07001188 udp_tunnel_notify_del_rx_port(vs->sock,
Alexander Duyckb9adcd692016-06-16 12:23:19 -07001189 (vs->flags & VXLAN_F_GPE) ?
1190 UDP_TUNNEL_TYPE_VXLAN_GPE :
Alexander Duycke7b3db52016-06-16 12:20:52 -07001191 UDP_TUNNEL_TYPE_VXLAN);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001192 spin_unlock(&vn->sock_lock);
1193
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001194 return true;
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001195}
1196
Jiri Bencb1be00a2015-09-24 13:50:02 +02001197static void vxlan_sock_release(struct vxlan_dev *vxlan)
1198{
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001199 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001200#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001201 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1202
Mark Bloch57d88182017-06-07 14:36:58 +03001203 RCU_INIT_POINTER(vxlan->vn6_sock, NULL);
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001204#endif
1205
Mark Bloch57d88182017-06-07 14:36:58 +03001206 RCU_INIT_POINTER(vxlan->vn4_sock, NULL);
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001207 synchronize_net();
1208
Mark Blocha53cb292017-06-02 03:24:08 +03001209 vxlan_vs_del_dev(vxlan);
1210
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001211 if (__vxlan_sock_release_prep(sock4)) {
1212 udp_tunnel_sock_release(sock4->sock);
1213 kfree(sock4);
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001214 }
1215
1216#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001217 if (__vxlan_sock_release_prep(sock6)) {
1218 udp_tunnel_sock_release(sock6->sock);
1219 kfree(sock6);
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001220 }
Jiri Bencb1be00a2015-09-24 13:50:02 +02001221#endif
1222}
1223
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001224/* Update multicast group membership when first VNI on
Simon Hormanc4b49512015-04-02 11:17:58 +09001225 * multicast address is brought up
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001226 */
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001227static int vxlan_igmp_join(struct vxlan_dev *vxlan)
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001228{
Jiri Bencb1be00a2015-09-24 13:50:02 +02001229 struct sock *sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001230 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1231 int ifindex = vxlan->default_dst.remote_ifindex;
Marcelo Ricardo Leitner149d7542015-03-20 10:26:21 -03001232 int ret = -EINVAL;
stephen hemmingerd3428942012-10-01 12:32:35 +00001233
Cong Wange4c7ed42013-08-31 13:44:33 +08001234 if (ip->sa.sa_family == AF_INET) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001235 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
Cong Wange4c7ed42013-08-31 13:44:33 +08001236 struct ip_mreqn mreq = {
1237 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1238 .imr_ifindex = ifindex,
1239 };
1240
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001241 sk = sock4->sock->sk;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001242 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001243 ret = ip_mc_join_group(sk, &mreq);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001244 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001245#if IS_ENABLED(CONFIG_IPV6)
1246 } else {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001247 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1248
1249 sk = sock6->sock->sk;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001250 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001251 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1252 &ip->sin6.sin6_addr);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001253 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001254#endif
1255 }
stephen hemminger3fc2de22013-07-18 08:40:15 -07001256
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001257 return ret;
stephen hemminger3fc2de22013-07-18 08:40:15 -07001258}
1259
1260/* Inverse of vxlan_igmp_join when last VNI is brought down */
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001261static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
stephen hemminger3fc2de22013-07-18 08:40:15 -07001262{
Jiri Bencb1be00a2015-09-24 13:50:02 +02001263 struct sock *sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001264 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1265 int ifindex = vxlan->default_dst.remote_ifindex;
Marcelo Ricardo Leitner149d7542015-03-20 10:26:21 -03001266 int ret = -EINVAL;
stephen hemminger3fc2de22013-07-18 08:40:15 -07001267
Cong Wange4c7ed42013-08-31 13:44:33 +08001268 if (ip->sa.sa_family == AF_INET) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001269 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
Cong Wange4c7ed42013-08-31 13:44:33 +08001270 struct ip_mreqn mreq = {
1271 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1272 .imr_ifindex = ifindex,
1273 };
1274
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001275 sk = sock4->sock->sk;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001276 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001277 ret = ip_mc_leave_group(sk, &mreq);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001278 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001279#if IS_ENABLED(CONFIG_IPV6)
1280 } else {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001281 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1282
1283 sk = sock6->sock->sk;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001284 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001285 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1286 &ip->sin6.sin6_addr);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001287 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001288#endif
1289 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001290
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001291 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00001292}
1293
Jiri Bencf14eceb2016-02-16 21:59:01 +01001294static bool vxlan_remcsum(struct vxlanhdr *unparsed,
1295 struct sk_buff *skb, u32 vxflags)
Tom Herbertdfd86452015-01-12 17:00:38 -08001296{
Jiri Benc7d34fa72016-03-21 17:50:05 +01001297 size_t start, offset;
Tom Herbertdfd86452015-01-12 17:00:38 -08001298
Jiri Bencf14eceb2016-02-16 21:59:01 +01001299 if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload)
1300 goto out;
Tom Herbertb7fe10e2015-08-19 17:07:32 -07001301
Jiri Bencf14eceb2016-02-16 21:59:01 +01001302 start = vxlan_rco_start(unparsed->vx_vni);
1303 offset = start + vxlan_rco_offset(unparsed->vx_vni);
Tom Herbertdfd86452015-01-12 17:00:38 -08001304
Jiri Benc7d34fa72016-03-21 17:50:05 +01001305 if (!pskb_may_pull(skb, offset + sizeof(u16)))
Jiri Bencbe5cfea2016-02-16 21:58:59 +01001306 return false;
Tom Herbertdfd86452015-01-12 17:00:38 -08001307
Jiri Bencbe5cfea2016-02-16 21:58:59 +01001308 skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset,
1309 !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL));
Jiri Bencf14eceb2016-02-16 21:59:01 +01001310out:
1311 unparsed->vx_flags &= ~VXLAN_HF_RCO;
1312 unparsed->vx_vni &= VXLAN_VNI_MASK;
Jiri Bencbe5cfea2016-02-16 21:58:59 +01001313 return true;
Tom Herbertdfd86452015-01-12 17:00:38 -08001314}
1315
Jiri Bencf14eceb2016-02-16 21:59:01 +01001316static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed,
Jiri Benc64f87d32016-02-23 18:02:55 +01001317 struct sk_buff *skb, u32 vxflags,
Jiri Benc10a5af22016-02-23 18:02:59 +01001318 struct vxlan_metadata *md)
Jiri Benc3288af02016-02-16 21:59:00 +01001319{
Jiri Bencf14eceb2016-02-16 21:59:01 +01001320 struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed;
Jiri Benc10a5af22016-02-23 18:02:59 +01001321 struct metadata_dst *tun_dst;
Jiri Benc3288af02016-02-16 21:59:00 +01001322
Jiri Bencf14eceb2016-02-16 21:59:01 +01001323 if (!(unparsed->vx_flags & VXLAN_HF_GBP))
1324 goto out;
1325
Jiri Benc3288af02016-02-16 21:59:00 +01001326 md->gbp = ntohs(gbp->policy_id);
1327
Jiri Benc10a5af22016-02-23 18:02:59 +01001328 tun_dst = (struct metadata_dst *)skb_dst(skb);
David S. Miller810813c2016-03-08 12:34:12 -05001329 if (tun_dst) {
Jiri Benc3288af02016-02-16 21:59:00 +01001330 tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
David S. Miller810813c2016-03-08 12:34:12 -05001331 tun_dst->u.tun_info.options_len = sizeof(*md);
1332 }
Jiri Benc3288af02016-02-16 21:59:00 +01001333 if (gbp->dont_learn)
1334 md->gbp |= VXLAN_GBP_DONT_LEARN;
1335
1336 if (gbp->policy_applied)
1337 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
Jiri Bencf14eceb2016-02-16 21:59:01 +01001338
Jiri Benc64f87d32016-02-23 18:02:55 +01001339 /* In flow-based mode, GBP is carried in dst_metadata */
1340 if (!(vxflags & VXLAN_F_COLLECT_METADATA))
1341 skb->mark = md->gbp;
Jiri Bencf14eceb2016-02-16 21:59:01 +01001342out:
1343 unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
Jiri Benc3288af02016-02-16 21:59:00 +01001344}
1345
Jiri Bence1e53142016-04-05 14:47:13 +02001346static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed,
Jiri Benc61618ee2016-04-11 17:06:08 +02001347 __be16 *protocol,
Jiri Bence1e53142016-04-05 14:47:13 +02001348 struct sk_buff *skb, u32 vxflags)
1349{
1350 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed;
1351
1352 /* Need to have Next Protocol set for interfaces in GPE mode. */
1353 if (!gpe->np_applied)
1354 return false;
1355 /* "The initial version is 0. If a receiver does not support the
1356 * version indicated it MUST drop the packet.
1357 */
1358 if (gpe->version != 0)
1359 return false;
1360 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1361 * processing MUST occur." However, we don't implement OAM
1362 * processing, thus drop the packet.
1363 */
1364 if (gpe->oam_flag)
1365 return false;
1366
Jiri Bencfa20e0e2017-08-28 21:43:22 +02001367 *protocol = tun_p_to_eth_p(gpe->next_protocol);
1368 if (!*protocol)
Jiri Bence1e53142016-04-05 14:47:13 +02001369 return false;
Jiri Bence1e53142016-04-05 14:47:13 +02001370
1371 unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS;
1372 return true;
1373}
1374
Jiri Benc1ab016e2016-02-23 18:02:56 +01001375static bool vxlan_set_mac(struct vxlan_dev *vxlan,
1376 struct vxlan_sock *vs,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001377 struct sk_buff *skb, __be32 vni)
Thomas Graf614732e2015-07-21 10:44:06 +02001378{
Thomas Graf614732e2015-07-21 10:44:06 +02001379 union vxlan_addr saddr;
Matthias Schiffer87613de2017-06-19 10:03:59 +02001380 u32 ifindex = skb->dev->ifindex;
Thomas Graf614732e2015-07-21 10:44:06 +02001381
Thomas Graf614732e2015-07-21 10:44:06 +02001382 skb_reset_mac_header(skb);
Thomas Graf614732e2015-07-21 10:44:06 +02001383 skb->protocol = eth_type_trans(skb, vxlan->dev);
1384 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1385
1386 /* Ignore packet loops (and multicast echo) */
1387 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
Jiri Benc1ab016e2016-02-23 18:02:56 +01001388 return false;
Thomas Graf614732e2015-07-21 10:44:06 +02001389
Jiri Benc760c6802016-02-23 18:02:57 +01001390 /* Get address from the outer IP header */
Jiri Bencce212d02015-12-07 16:29:08 +01001391 if (vxlan_get_sk_family(vs) == AF_INET) {
Jiri Benc1ab016e2016-02-23 18:02:56 +01001392 saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
Thomas Graf614732e2015-07-21 10:44:06 +02001393 saddr.sa.sa_family = AF_INET;
1394#if IS_ENABLED(CONFIG_IPV6)
1395 } else {
Jiri Benc1ab016e2016-02-23 18:02:56 +01001396 saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
Thomas Graf614732e2015-07-21 10:44:06 +02001397 saddr.sa.sa_family = AF_INET6;
1398#endif
1399 }
1400
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001401 if ((vxlan->cfg.flags & VXLAN_F_LEARN) &&
Matthias Schiffer87613de2017-06-19 10:03:59 +02001402 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni))
Jiri Benc1ab016e2016-02-23 18:02:56 +01001403 return false;
1404
1405 return true;
1406}
1407
Jiri Benc760c6802016-02-23 18:02:57 +01001408static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph,
1409 struct sk_buff *skb)
1410{
1411 int err = 0;
1412
1413 if (vxlan_get_sk_family(vs) == AF_INET)
1414 err = IP_ECN_decapsulate(oiph, skb);
1415#if IS_ENABLED(CONFIG_IPV6)
1416 else
1417 err = IP6_ECN_decapsulate(oiph, skb);
1418#endif
1419
1420 if (unlikely(err) && log_ecn_error) {
1421 if (vxlan_get_sk_family(vs) == AF_INET)
1422 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1423 &((struct iphdr *)oiph)->saddr,
1424 ((struct iphdr *)oiph)->tos);
1425 else
1426 net_info_ratelimited("non-ECT from %pI6\n",
1427 &((struct ipv6hdr *)oiph)->saddr);
1428 }
1429 return err <= 1;
1430}
1431
stephen hemmingerd3428942012-10-01 12:32:35 +00001432/* Callback from net/ipv4/udp.c to receive packets */
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001433static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
stephen hemmingerd3428942012-10-01 12:32:35 +00001434{
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001435 struct pcpu_sw_netstats *stats;
Jiri Bencc9e78ef2016-02-18 11:22:51 +01001436 struct vxlan_dev *vxlan;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001437 struct vxlan_sock *vs;
Jiri Bencf14eceb2016-02-16 21:59:01 +01001438 struct vxlanhdr unparsed;
Thomas Grafee122c72015-07-21 10:43:58 +02001439 struct vxlan_metadata _md;
1440 struct vxlan_metadata *md = &_md;
Jiri Benc61618ee2016-04-11 17:06:08 +02001441 __be16 protocol = htons(ETH_P_TEB);
Jiri Bence1e53142016-04-05 14:47:13 +02001442 bool raw_proto = false;
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001443 void *oiph;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001444 __be32 vni = 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00001445
Jiri Bence1e53142016-04-05 14:47:13 +02001446 /* Need UDP and VXLAN header to be present */
Pravin B Shelar7ce04752013-08-19 11:22:54 -07001447 if (!pskb_may_pull(skb, VXLAN_HLEN))
Hannes Frederic Sowae5aed002016-05-19 15:58:33 +02001448 goto drop;
stephen hemmingerd3428942012-10-01 12:32:35 +00001449
Jiri Bencf14eceb2016-02-16 21:59:01 +01001450 unparsed = *vxlan_hdr(skb);
Jiri Benc288b01c2016-02-16 21:59:02 +01001451 /* VNI flag always required to be set */
1452 if (!(unparsed.vx_flags & VXLAN_HF_VNI)) {
1453 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1454 ntohl(vxlan_hdr(skb)->vx_flags),
1455 ntohl(vxlan_hdr(skb)->vx_vni));
1456 /* Return non vxlan pkt */
Hannes Frederic Sowae5aed002016-05-19 15:58:33 +02001457 goto drop;
stephen hemmingerd3428942012-10-01 12:32:35 +00001458 }
Jiri Benc288b01c2016-02-16 21:59:02 +01001459 unparsed.vx_flags &= ~VXLAN_HF_VNI;
1460 unparsed.vx_vni &= ~VXLAN_VNI_MASK;
stephen hemmingerd3428942012-10-01 12:32:35 +00001461
Pravin B Shelar559835ea2013-09-24 10:25:40 -07001462 vs = rcu_dereference_sk_user_data(sk);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001463 if (!vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001464 goto drop;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001465
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001466 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);
1467
Matthias Schiffer49f810f2017-06-19 10:04:00 +02001468 vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni);
Jiri Bencc9e78ef2016-02-18 11:22:51 +01001469 if (!vxlan)
1470 goto drop;
1471
Jiri Bence1e53142016-04-05 14:47:13 +02001472 /* For backwards compatibility, only allow reserved fields to be
1473 * used by VXLAN extensions if explicitly requested.
1474 */
1475 if (vs->flags & VXLAN_F_GPE) {
1476 if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags))
1477 goto drop;
1478 raw_proto = true;
1479 }
1480
1481 if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto,
1482 !net_eq(vxlan->net, dev_net(vxlan->dev))))
1483 goto drop;
Jiri Bencc9e78ef2016-02-18 11:22:51 +01001484
Thomas Grafee122c72015-07-21 10:43:58 +02001485 if (vxlan_collect_metadata(vs)) {
Jiri Benc10a5af22016-02-23 18:02:59 +01001486 struct metadata_dst *tun_dst;
Jiri Benc07dabf22016-02-18 19:19:29 +01001487
Pravin B Shelarc29a70d2015-08-26 23:46:50 -07001488 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
Amir Vadaid817f432016-09-08 16:23:45 +03001489 key32_to_tunnel_id(vni), sizeof(*md));
Pravin B Shelarc29a70d2015-08-26 23:46:50 -07001490
Thomas Grafee122c72015-07-21 10:43:58 +02001491 if (!tun_dst)
1492 goto drop;
1493
Geert Uytterhoeven0f1b7352015-09-04 12:49:32 +02001494 md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
Jiri Benc10a5af22016-02-23 18:02:59 +01001495
1496 skb_dst_set(skb, (struct dst_entry *)tun_dst);
Thomas Grafee122c72015-07-21 10:43:58 +02001497 } else {
1498 memset(md, 0, sizeof(*md));
1499 }
1500
Jiri Bencf14eceb2016-02-16 21:59:01 +01001501 if (vs->flags & VXLAN_F_REMCSUM_RX)
1502 if (!vxlan_remcsum(&unparsed, skb, vs->flags))
1503 goto drop;
1504 if (vs->flags & VXLAN_F_GBP)
Jiri Benc10a5af22016-02-23 18:02:59 +01001505 vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md);
Jiri Bence1e53142016-04-05 14:47:13 +02001506 /* Note that GBP and GPE can never be active together. This is
1507 * ensured in vxlan_dev_configure.
1508 */
Thomas Graf35114942015-01-15 03:53:55 +01001509
Jiri Bencf14eceb2016-02-16 21:59:01 +01001510 if (unparsed.vx_flags || unparsed.vx_vni) {
Tom Herbert3bf39472015-01-08 12:31:18 -08001511 /* If there are any unprocessed flags remaining treat
1512 * this as a malformed packet. This behavior diverges from
1513 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1514 * in reserved fields are to be ignored. The approach here
Simon Hormanc4b49512015-04-02 11:17:58 +09001515 * maintains compatibility with previous stack code, and also
Tom Herbert3bf39472015-01-08 12:31:18 -08001516 * is more robust and provides a little more security in
1517 * adding extensions to VXLAN.
1518 */
Jiri Benc288b01c2016-02-16 21:59:02 +01001519 goto drop;
Tom Herbert3bf39472015-01-08 12:31:18 -08001520 }
1521
Jiri Bence1e53142016-04-05 14:47:13 +02001522 if (!raw_proto) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001523 if (!vxlan_set_mac(vxlan, vs, skb, vni))
Jiri Bence1e53142016-04-05 14:47:13 +02001524 goto drop;
1525 } else {
Jiri Benc8be0cfa2016-05-13 10:48:42 +02001526 skb_reset_mac_header(skb);
Jiri Bence1e53142016-04-05 14:47:13 +02001527 skb->dev = vxlan->dev;
1528 skb->pkt_type = PACKET_HOST;
1529 }
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001530
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001531 oiph = skb_network_header(skb);
1532 skb_reset_network_header(skb);
1533
1534 if (!vxlan_ecn_decapsulate(vs, oiph, skb)) {
1535 ++vxlan->dev->stats.rx_frame_errors;
1536 ++vxlan->dev->stats.rx_errors;
1537 goto drop;
1538 }
1539
1540 stats = this_cpu_ptr(vxlan->dev->tstats);
1541 u64_stats_update_begin(&stats->syncp);
1542 stats->rx_packets++;
1543 stats->rx_bytes += skb->len;
1544 u64_stats_update_end(&stats->syncp);
1545
1546 gro_cells_receive(&vxlan->gro_cells, skb);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001547 return 0;
1548
1549drop:
Jiri Benc288b01c2016-02-16 21:59:02 +01001550 /* Consume bad packet */
1551 kfree_skb(skb);
1552 return 0;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001553}
1554
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001555static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
David Stevense4f67ad2012-11-20 02:50:14 +00001556{
1557 struct vxlan_dev *vxlan = netdev_priv(dev);
1558 struct arphdr *parp;
1559 u8 *arpptr, *sha;
1560 __be32 sip, tip;
1561 struct neighbour *n;
1562
1563 if (dev->flags & IFF_NOARP)
1564 goto out;
1565
1566 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1567 dev->stats.tx_dropped++;
1568 goto out;
1569 }
1570 parp = arp_hdr(skb);
1571
1572 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1573 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1574 parp->ar_pro != htons(ETH_P_IP) ||
1575 parp->ar_op != htons(ARPOP_REQUEST) ||
1576 parp->ar_hln != dev->addr_len ||
1577 parp->ar_pln != 4)
1578 goto out;
1579 arpptr = (u8 *)parp + sizeof(struct arphdr);
1580 sha = arpptr;
1581 arpptr += dev->addr_len; /* sha */
1582 memcpy(&sip, arpptr, sizeof(sip));
1583 arpptr += sizeof(sip);
1584 arpptr += dev->addr_len; /* tha */
1585 memcpy(&tip, arpptr, sizeof(tip));
1586
1587 if (ipv4_is_loopback(tip) ||
1588 ipv4_is_multicast(tip))
1589 goto out;
1590
1591 n = neigh_lookup(&arp_tbl, &tip, dev);
1592
1593 if (n) {
David Stevense4f67ad2012-11-20 02:50:14 +00001594 struct vxlan_fdb *f;
1595 struct sk_buff *reply;
1596
1597 if (!(n->nud_state & NUD_CONNECTED)) {
1598 neigh_release(n);
1599 goto out;
1600 }
1601
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001602 f = vxlan_find_mac(vxlan, n->ha, vni);
Cong Wange4c7ed42013-08-31 13:44:33 +08001603 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
David Stevense4f67ad2012-11-20 02:50:14 +00001604 /* bridge-local neighbor */
1605 neigh_release(n);
1606 goto out;
1607 }
1608
1609 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1610 n->ha, sha);
1611
1612 neigh_release(n);
1613
David Stevens73461352014-03-18 12:32:29 -04001614 if (reply == NULL)
1615 goto out;
1616
David Stevense4f67ad2012-11-20 02:50:14 +00001617 skb_reset_mac_header(reply);
1618 __skb_pull(reply, skb_network_offset(reply));
1619 reply->ip_summed = CHECKSUM_UNNECESSARY;
1620 reply->pkt_type = PACKET_HOST;
1621
1622 if (netif_rx_ni(reply) == NET_RX_DROP)
1623 dev->stats.rx_dropped++;
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001624 } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) {
Cong Wange4c7ed42013-08-31 13:44:33 +08001625 union vxlan_addr ipa = {
1626 .sin.sin_addr.s_addr = tip,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001627 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001628 };
1629
1630 vxlan_ip_miss(dev, &ipa);
1631 }
David Stevense4f67ad2012-11-20 02:50:14 +00001632out:
1633 consume_skb(skb);
1634 return NETDEV_TX_OK;
1635}
1636
Cong Wangf564f452013-08-31 13:44:36 +08001637#if IS_ENABLED(CONFIG_IPV6)
David Stevens4b29dba2014-03-24 10:39:58 -04001638static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1639 struct neighbour *n, bool isrouter)
1640{
1641 struct net_device *dev = request->dev;
1642 struct sk_buff *reply;
1643 struct nd_msg *ns, *na;
1644 struct ipv6hdr *pip6;
1645 u8 *daddr;
1646 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1647 int ns_olen;
1648 int i, len;
1649
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02001650 if (dev == NULL || !pskb_may_pull(request, request->len))
David Stevens4b29dba2014-03-24 10:39:58 -04001651 return NULL;
1652
1653 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1654 sizeof(*na) + na_olen + dev->needed_tailroom;
1655 reply = alloc_skb(len, GFP_ATOMIC);
1656 if (reply == NULL)
1657 return NULL;
1658
1659 reply->protocol = htons(ETH_P_IPV6);
1660 reply->dev = dev;
1661 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1662 skb_push(reply, sizeof(struct ethhdr));
Zhang Shengju6297b912016-03-03 01:16:54 +00001663 skb_reset_mac_header(reply);
David Stevens4b29dba2014-03-24 10:39:58 -04001664
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02001665 ns = (struct nd_msg *)(ipv6_hdr(request) + 1);
David Stevens4b29dba2014-03-24 10:39:58 -04001666
1667 daddr = eth_hdr(request)->h_source;
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02001668 ns_olen = request->len - skb_network_offset(request) -
1669 sizeof(struct ipv6hdr) - sizeof(*ns);
David Stevens4b29dba2014-03-24 10:39:58 -04001670 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1671 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1672 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1673 break;
1674 }
1675 }
1676
1677 /* Ethernet header */
1678 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1679 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1680 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1681 reply->protocol = htons(ETH_P_IPV6);
1682
1683 skb_pull(reply, sizeof(struct ethhdr));
Zhang Shengju6297b912016-03-03 01:16:54 +00001684 skb_reset_network_header(reply);
David Stevens4b29dba2014-03-24 10:39:58 -04001685 skb_put(reply, sizeof(struct ipv6hdr));
1686
1687 /* IPv6 header */
1688
1689 pip6 = ipv6_hdr(reply);
1690 memset(pip6, 0, sizeof(struct ipv6hdr));
1691 pip6->version = 6;
1692 pip6->priority = ipv6_hdr(request)->priority;
1693 pip6->nexthdr = IPPROTO_ICMPV6;
1694 pip6->hop_limit = 255;
1695 pip6->daddr = ipv6_hdr(request)->saddr;
1696 pip6->saddr = *(struct in6_addr *)n->primary_key;
1697
1698 skb_pull(reply, sizeof(struct ipv6hdr));
Zhang Shengju6297b912016-03-03 01:16:54 +00001699 skb_reset_transport_header(reply);
David Stevens4b29dba2014-03-24 10:39:58 -04001700
David Stevens4b29dba2014-03-24 10:39:58 -04001701 /* Neighbor Advertisement */
Johannes Bergb080db52017-06-16 14:29:19 +02001702 na = skb_put_zero(reply, sizeof(*na) + na_olen);
David Stevens4b29dba2014-03-24 10:39:58 -04001703 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1704 na->icmph.icmp6_router = isrouter;
1705 na->icmph.icmp6_override = 1;
1706 na->icmph.icmp6_solicited = 1;
1707 na->target = ns->target;
1708 ether_addr_copy(&na->opt[2], n->ha);
1709 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1710 na->opt[1] = na_olen >> 3;
1711
1712 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1713 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1714 csum_partial(na, sizeof(*na)+na_olen, 0));
1715
1716 pip6->payload_len = htons(sizeof(*na)+na_olen);
1717
1718 skb_push(reply, sizeof(struct ipv6hdr));
1719
1720 reply->ip_summed = CHECKSUM_UNNECESSARY;
1721
1722 return reply;
1723}
1724
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001725static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
Cong Wangf564f452013-08-31 13:44:36 +08001726{
1727 struct vxlan_dev *vxlan = netdev_priv(dev);
Roopa Prabhu8dcd81a2017-02-20 08:41:16 -08001728 const struct in6_addr *daddr;
Xin Long8bff36852017-11-11 19:58:50 +08001729 const struct ipv6hdr *iphdr;
David Stevens4b29dba2014-03-24 10:39:58 -04001730 struct inet6_dev *in6_dev;
Xin Long8bff36852017-11-11 19:58:50 +08001731 struct neighbour *n;
1732 struct nd_msg *msg;
Cong Wangf564f452013-08-31 13:44:36 +08001733
1734 in6_dev = __in6_dev_get(dev);
1735 if (!in6_dev)
1736 goto out;
1737
Cong Wangf564f452013-08-31 13:44:36 +08001738 iphdr = ipv6_hdr(skb);
Cong Wangf564f452013-08-31 13:44:36 +08001739 daddr = &iphdr->daddr;
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02001740 msg = (struct nd_msg *)(iphdr + 1);
Cong Wangf564f452013-08-31 13:44:36 +08001741
David Stevens4b29dba2014-03-24 10:39:58 -04001742 if (ipv6_addr_loopback(daddr) ||
1743 ipv6_addr_is_multicast(&msg->target))
1744 goto out;
1745
1746 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
Cong Wangf564f452013-08-31 13:44:36 +08001747
1748 if (n) {
1749 struct vxlan_fdb *f;
David Stevens4b29dba2014-03-24 10:39:58 -04001750 struct sk_buff *reply;
Cong Wangf564f452013-08-31 13:44:36 +08001751
1752 if (!(n->nud_state & NUD_CONNECTED)) {
1753 neigh_release(n);
1754 goto out;
1755 }
1756
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001757 f = vxlan_find_mac(vxlan, n->ha, vni);
Cong Wangf564f452013-08-31 13:44:36 +08001758 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1759 /* bridge-local neighbor */
1760 neigh_release(n);
1761 goto out;
1762 }
1763
David Stevens4b29dba2014-03-24 10:39:58 -04001764 reply = vxlan_na_create(skb, n,
1765 !!(f ? f->flags & NTF_ROUTER : 0));
1766
Cong Wangf564f452013-08-31 13:44:36 +08001767 neigh_release(n);
David Stevens4b29dba2014-03-24 10:39:58 -04001768
1769 if (reply == NULL)
1770 goto out;
1771
1772 if (netif_rx_ni(reply) == NET_RX_DROP)
1773 dev->stats.rx_dropped++;
1774
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001775 } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) {
David Stevens4b29dba2014-03-24 10:39:58 -04001776 union vxlan_addr ipa = {
1777 .sin6.sin6_addr = msg->target,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001778 .sin6.sin6_family = AF_INET6,
David Stevens4b29dba2014-03-24 10:39:58 -04001779 };
1780
Cong Wangf564f452013-08-31 13:44:36 +08001781 vxlan_ip_miss(dev, &ipa);
1782 }
1783
1784out:
1785 consume_skb(skb);
1786 return NETDEV_TX_OK;
1787}
1788#endif
1789
David Stevense4f67ad2012-11-20 02:50:14 +00001790static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1791{
1792 struct vxlan_dev *vxlan = netdev_priv(dev);
1793 struct neighbour *n;
David Stevense4f67ad2012-11-20 02:50:14 +00001794
1795 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1796 return false;
1797
1798 n = NULL;
1799 switch (ntohs(eth_hdr(skb)->h_proto)) {
1800 case ETH_P_IP:
Cong Wange15a00a2013-08-31 13:44:34 +08001801 {
1802 struct iphdr *pip;
1803
David Stevense4f67ad2012-11-20 02:50:14 +00001804 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1805 return false;
1806 pip = ip_hdr(skb);
1807 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001808 if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) {
Cong Wange4c7ed42013-08-31 13:44:33 +08001809 union vxlan_addr ipa = {
1810 .sin.sin_addr.s_addr = pip->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001811 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001812 };
1813
1814 vxlan_ip_miss(dev, &ipa);
1815 return false;
1816 }
1817
David Stevense4f67ad2012-11-20 02:50:14 +00001818 break;
Cong Wange15a00a2013-08-31 13:44:34 +08001819 }
1820#if IS_ENABLED(CONFIG_IPV6)
1821 case ETH_P_IPV6:
1822 {
1823 struct ipv6hdr *pip6;
1824
1825 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1826 return false;
1827 pip6 = ipv6_hdr(skb);
1828 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001829 if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) {
Cong Wange15a00a2013-08-31 13:44:34 +08001830 union vxlan_addr ipa = {
1831 .sin6.sin6_addr = pip6->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001832 .sin6.sin6_family = AF_INET6,
Cong Wange15a00a2013-08-31 13:44:34 +08001833 };
1834
1835 vxlan_ip_miss(dev, &ipa);
1836 return false;
1837 }
1838
1839 break;
1840 }
1841#endif
David Stevense4f67ad2012-11-20 02:50:14 +00001842 default:
1843 return false;
1844 }
1845
1846 if (n) {
1847 bool diff;
1848
Joe Perches7367d0b2013-09-01 11:51:23 -07001849 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
David Stevense4f67ad2012-11-20 02:50:14 +00001850 if (diff) {
1851 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1852 dev->addr_len);
1853 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1854 }
1855 neigh_release(n);
1856 return diff;
Cong Wange4c7ed42013-08-31 13:44:33 +08001857 }
1858
David Stevense4f67ad2012-11-20 02:50:14 +00001859 return false;
1860}
1861
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001862static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
Thomas Graf35114942015-01-15 03:53:55 +01001863 struct vxlan_metadata *md)
1864{
1865 struct vxlanhdr_gbp *gbp;
1866
Thomas Grafdb79a622015-02-04 17:00:04 +01001867 if (!md->gbp)
1868 return;
1869
Thomas Graf35114942015-01-15 03:53:55 +01001870 gbp = (struct vxlanhdr_gbp *)vxh;
Jiri Benc54bfd872016-02-16 21:58:58 +01001871 vxh->vx_flags |= VXLAN_HF_GBP;
Thomas Graf35114942015-01-15 03:53:55 +01001872
1873 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1874 gbp->dont_learn = 1;
1875
1876 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1877 gbp->policy_applied = 1;
1878
1879 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1880}
1881
Jiri Bence1e53142016-04-05 14:47:13 +02001882static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags,
1883 __be16 protocol)
1884{
1885 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh;
1886
1887 gpe->np_applied = 1;
Jiri Bencfa20e0e2017-08-28 21:43:22 +02001888 gpe->next_protocol = tun_p_from_eth_p(protocol);
1889 if (!gpe->next_protocol)
1890 return -EPFNOSUPPORT;
1891 return 0;
Jiri Bence1e53142016-04-05 14:47:13 +02001892}
1893
Jiri Bencf491e562016-02-02 18:09:16 +01001894static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
1895 int iphdr_len, __be32 vni,
1896 struct vxlan_metadata *md, u32 vxflags,
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01001897 bool udp_sum)
Cong Wange4c7ed42013-08-31 13:44:33 +08001898{
Cong Wange4c7ed42013-08-31 13:44:33 +08001899 struct vxlanhdr *vxh;
Cong Wange4c7ed42013-08-31 13:44:33 +08001900 int min_headroom;
1901 int err;
Tom Herbertdfd86452015-01-12 17:00:38 -08001902 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
Jiri Bence1e53142016-04-05 14:47:13 +02001903 __be16 inner_protocol = htons(ETH_P_TEB);
Cong Wange4c7ed42013-08-31 13:44:33 +08001904
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001905 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
Tom Herbertdfd86452015-01-12 17:00:38 -08001906 skb->ip_summed == CHECKSUM_PARTIAL) {
1907 int csum_start = skb_checksum_start_offset(skb);
1908
1909 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1910 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1911 (skb->csum_offset == offsetof(struct udphdr, check) ||
Edward Creeb5708502016-02-11 20:57:17 +00001912 skb->csum_offset == offsetof(struct tcphdr, check)))
Tom Herbertdfd86452015-01-12 17:00:38 -08001913 type |= SKB_GSO_TUNNEL_REMCSUM;
Tom Herbertdfd86452015-01-12 17:00:38 -08001914 }
1915
Cong Wange4c7ed42013-08-31 13:44:33 +08001916 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
pravin shelar4a4f86c2016-11-13 20:43:52 -08001917 + VXLAN_HLEN + iphdr_len;
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001918
1919 /* Need space for new headers (invalidates iph ptr) */
1920 err = skb_cow_head(skb, min_headroom);
Jiri Bence1e53142016-04-05 14:47:13 +02001921 if (unlikely(err))
pravin shelarc46b7892016-11-13 20:43:54 -08001922 return err;
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001923
Alexander Duyckaed069d2016-04-14 15:33:37 -04001924 err = iptunnel_handle_offloads(skb, type);
1925 if (err)
pravin shelarc46b7892016-11-13 20:43:54 -08001926 return err;
Jesse Grossb736a622015-04-09 11:19:14 -07001927
Johannes Bergd58ff352017-06-16 14:29:23 +02001928 vxh = __skb_push(skb, sizeof(*vxh));
Jiri Benc54bfd872016-02-16 21:58:58 +01001929 vxh->vx_flags = VXLAN_HF_VNI;
1930 vxh->vx_vni = vxlan_vni_field(vni);
Pravin B Shelar49560532013-08-19 11:23:17 -07001931
Tom Herbertdfd86452015-01-12 17:00:38 -08001932 if (type & SKB_GSO_TUNNEL_REMCSUM) {
Jiri Benc54bfd872016-02-16 21:58:58 +01001933 unsigned int start;
Tom Herbertdfd86452015-01-12 17:00:38 -08001934
Jiri Benc54bfd872016-02-16 21:58:58 +01001935 start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr);
1936 vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset);
1937 vxh->vx_flags |= VXLAN_HF_RCO;
Tom Herbertdfd86452015-01-12 17:00:38 -08001938
1939 if (!skb_is_gso(skb)) {
1940 skb->ip_summed = CHECKSUM_NONE;
1941 skb->encapsulation = 0;
1942 }
1943 }
1944
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001945 if (vxflags & VXLAN_F_GBP)
1946 vxlan_build_gbp_hdr(vxh, vxflags, md);
Jiri Bence1e53142016-04-05 14:47:13 +02001947 if (vxflags & VXLAN_F_GPE) {
1948 err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol);
1949 if (err < 0)
pravin shelarc46b7892016-11-13 20:43:54 -08001950 return err;
Jiri Bence1e53142016-04-05 14:47:13 +02001951 inner_protocol = skb->protocol;
1952 }
Thomas Graf35114942015-01-15 03:53:55 +01001953
Jiri Bence1e53142016-04-05 14:47:13 +02001954 skb_set_inner_protocol(skb, inner_protocol);
Pravin B Shelar039f5062015-12-24 14:34:54 -08001955 return 0;
Pravin B Shelar49560532013-08-19 11:23:17 -07001956}
Pravin B Shelar49560532013-08-19 11:23:17 -07001957
pravin shelar655c3de2016-11-13 20:43:55 -08001958static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev,
1959 struct vxlan_sock *sock4,
Jiri Benc1a8496b2016-02-02 18:09:14 +01001960 struct sk_buff *skb, int oif, u8 tos,
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00001961 __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport,
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001962 struct dst_cache *dst_cache,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001963 const struct ip_tunnel_info *info)
Jiri Benc1a8496b2016-02-02 18:09:14 +01001964{
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001965 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
Jiri Benc1a8496b2016-02-02 18:09:14 +01001966 struct rtable *rt = NULL;
1967 struct flowi4 fl4;
1968
pravin shelar655c3de2016-11-13 20:43:55 -08001969 if (!sock4)
1970 return ERR_PTR(-EIO);
1971
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001972 if (tos && !info)
1973 use_cache = false;
1974 if (use_cache) {
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001975 rt = dst_cache_get_ip4(dst_cache, saddr);
1976 if (rt)
1977 return rt;
1978 }
1979
Jiri Benc1a8496b2016-02-02 18:09:14 +01001980 memset(&fl4, 0, sizeof(fl4));
1981 fl4.flowi4_oif = oif;
1982 fl4.flowi4_tos = RT_TOS(tos);
1983 fl4.flowi4_mark = skb->mark;
1984 fl4.flowi4_proto = IPPROTO_UDP;
1985 fl4.daddr = daddr;
pravin shelar272d96a2016-08-05 17:45:36 -07001986 fl4.saddr = *saddr;
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00001987 fl4.fl4_dport = dport;
1988 fl4.fl4_sport = sport;
Jiri Benc1a8496b2016-02-02 18:09:14 +01001989
1990 rt = ip_route_output_key(vxlan->net, &fl4);
pravin shelar655c3de2016-11-13 20:43:55 -08001991 if (likely(!IS_ERR(rt))) {
1992 if (rt->dst.dev == dev) {
1993 netdev_dbg(dev, "circular route to %pI4\n", &daddr);
1994 ip_rt_put(rt);
1995 return ERR_PTR(-ELOOP);
1996 }
1997
Jiri Benc1a8496b2016-02-02 18:09:14 +01001998 *saddr = fl4.saddr;
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001999 if (use_cache)
2000 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
pravin shelar655c3de2016-11-13 20:43:55 -08002001 } else {
2002 netdev_dbg(dev, "no route to %pI4\n", &daddr);
2003 return ERR_PTR(-ENETUNREACH);
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002004 }
Jiri Benc1a8496b2016-02-02 18:09:14 +01002005 return rt;
2006}
2007
Jiri Bence5d4b292015-12-07 13:04:30 +01002008#if IS_ENABLED(CONFIG_IPV6)
2009static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
pravin shelar655c3de2016-11-13 20:43:55 -08002010 struct net_device *dev,
pravin shelar03dc52a2016-11-13 20:43:53 -08002011 struct vxlan_sock *sock6,
Daniel Borkmann14006152016-03-04 15:15:08 +01002012 struct sk_buff *skb, int oif, u8 tos,
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002013 __be32 label,
Jiri Bence5d4b292015-12-07 13:04:30 +01002014 const struct in6_addr *daddr,
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002015 struct in6_addr *saddr,
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00002016 __be16 dport, __be16 sport,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002017 struct dst_cache *dst_cache,
2018 const struct ip_tunnel_info *info)
Jiri Bence5d4b292015-12-07 13:04:30 +01002019{
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002020 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
Jiri Bence5d4b292015-12-07 13:04:30 +01002021 struct dst_entry *ndst;
2022 struct flowi6 fl6;
2023 int err;
2024
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002025 if (!sock6)
2026 return ERR_PTR(-EIO);
2027
Daniel Borkmann14006152016-03-04 15:15:08 +01002028 if (tos && !info)
2029 use_cache = false;
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002030 if (use_cache) {
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002031 ndst = dst_cache_get_ip6(dst_cache, saddr);
2032 if (ndst)
2033 return ndst;
2034 }
2035
Jiri Bence5d4b292015-12-07 13:04:30 +01002036 memset(&fl6, 0, sizeof(fl6));
2037 fl6.flowi6_oif = oif;
2038 fl6.daddr = *daddr;
pravin shelar272d96a2016-08-05 17:45:36 -07002039 fl6.saddr = *saddr;
Daniel Borkmanneaa93bf2016-03-18 18:37:57 +01002040 fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label);
Jiri Bence5d4b292015-12-07 13:04:30 +01002041 fl6.flowi6_mark = skb->mark;
2042 fl6.flowi6_proto = IPPROTO_UDP;
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00002043 fl6.fl6_dport = dport;
2044 fl6.fl6_sport = sport;
Jiri Bence5d4b292015-12-07 13:04:30 +01002045
2046 err = ipv6_stub->ipv6_dst_lookup(vxlan->net,
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002047 sock6->sock->sk,
Jiri Bence5d4b292015-12-07 13:04:30 +01002048 &ndst, &fl6);
pravin shelar655c3de2016-11-13 20:43:55 -08002049 if (unlikely(err < 0)) {
2050 netdev_dbg(dev, "no route to %pI6\n", daddr);
2051 return ERR_PTR(-ENETUNREACH);
2052 }
2053
2054 if (unlikely(ndst->dev == dev)) {
2055 netdev_dbg(dev, "circular route to %pI6\n", daddr);
2056 dst_release(ndst);
2057 return ERR_PTR(-ELOOP);
2058 }
Jiri Bence5d4b292015-12-07 13:04:30 +01002059
2060 *saddr = fl6.saddr;
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002061 if (use_cache)
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002062 dst_cache_set_ip6(dst_cache, ndst, saddr);
Jiri Bence5d4b292015-12-07 13:04:30 +01002063 return ndst;
2064}
2065#endif
2066
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002067/* Bypass encapsulation if the destination is local */
2068static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002069 struct vxlan_dev *dst_vxlan, __be32 vni)
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002070{
Li RongQing8f849852014-01-04 13:57:59 +08002071 struct pcpu_sw_netstats *tx_stats, *rx_stats;
Cong Wange4c7ed42013-08-31 13:44:33 +08002072 union vxlan_addr loopback;
2073 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
Li RongQingce6502a2014-10-16 08:49:41 +08002074 struct net_device *dev = skb->dev;
2075 int len = skb->len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002076
Li RongQing8f849852014-01-04 13:57:59 +08002077 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
2078 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002079 skb->pkt_type = PACKET_HOST;
2080 skb->encapsulation = 0;
2081 skb->dev = dst_vxlan->dev;
2082 __skb_pull(skb, skb_network_offset(skb));
2083
Cong Wange4c7ed42013-08-31 13:44:33 +08002084 if (remote_ip->sa.sa_family == AF_INET) {
2085 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2086 loopback.sa.sa_family = AF_INET;
2087#if IS_ENABLED(CONFIG_IPV6)
2088 } else {
2089 loopback.sin6.sin6_addr = in6addr_loopback;
2090 loopback.sa.sa_family = AF_INET6;
2091#endif
2092 }
2093
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002094 if (dst_vxlan->cfg.flags & VXLAN_F_LEARN)
Matthias Schiffer87613de2017-06-19 10:03:59 +02002095 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source, 0,
2096 vni);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002097
2098 u64_stats_update_begin(&tx_stats->syncp);
2099 tx_stats->tx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08002100 tx_stats->tx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002101 u64_stats_update_end(&tx_stats->syncp);
2102
2103 if (netif_rx(skb) == NET_RX_SUCCESS) {
2104 u64_stats_update_begin(&rx_stats->syncp);
2105 rx_stats->rx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08002106 rx_stats->rx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002107 u64_stats_update_end(&rx_stats->syncp);
2108 } else {
Li RongQingce6502a2014-10-16 08:49:41 +08002109 dev->stats.rx_dropped++;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002110 }
2111}
2112
pravin shelarfee1fad2016-11-13 20:43:56 -08002113static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev,
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002114 struct vxlan_dev *vxlan,
2115 union vxlan_addr *daddr,
2116 __be16 dst_port, int dst_ifindex, __be32 vni,
2117 struct dst_entry *dst,
pravin shelarfee1fad2016-11-13 20:43:56 -08002118 u32 rt_flags)
2119{
2120#if IS_ENABLED(CONFIG_IPV6)
2121 /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of
2122 * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple
2123 * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry.
2124 */
2125 BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL);
2126#endif
2127 /* Bypass encapsulation if the destination is local */
2128 if (rt_flags & RTCF_LOCAL &&
2129 !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
2130 struct vxlan_dev *dst_vxlan;
2131
2132 dst_release(dst);
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002133 dst_vxlan = vxlan_find_vni(vxlan->net, dst_ifindex, vni,
pravin shelarfee1fad2016-11-13 20:43:56 -08002134 daddr->sa.sa_family, dst_port,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002135 vxlan->cfg.flags);
pravin shelarfee1fad2016-11-13 20:43:56 -08002136 if (!dst_vxlan) {
2137 dev->stats.tx_errors++;
2138 kfree_skb(skb);
2139
2140 return -ENOENT;
2141 }
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002142 vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni);
pravin shelarfee1fad2016-11-13 20:43:56 -08002143 return 1;
2144 }
2145
2146 return 0;
2147}
2148
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002149static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002150 __be32 default_vni, struct vxlan_rdst *rdst,
2151 bool did_rsc)
stephen hemmingerd3428942012-10-01 12:32:35 +00002152{
Paolo Abenid71785f2016-02-12 15:43:57 +01002153 struct dst_cache *dst_cache;
Thomas Graf3093fbe2015-07-21 10:44:00 +02002154 struct ip_tunnel_info *info;
stephen hemmingerd3428942012-10-01 12:32:35 +00002155 struct vxlan_dev *vxlan = netdev_priv(dev);
pravin shelar0770b532016-11-13 20:43:57 -08002156 const struct iphdr *old_iph = ip_hdr(skb);
Cong Wange4c7ed42013-08-31 13:44:33 +08002157 union vxlan_addr *dst;
pravin shelar272d96a2016-08-05 17:45:36 -07002158 union vxlan_addr remote_ip, local_ip;
Thomas Grafee122c72015-07-21 10:43:58 +02002159 struct vxlan_metadata _md;
2160 struct vxlan_metadata *md = &_md;
Cong Wange4c7ed42013-08-31 13:44:33 +08002161 __be16 src_port = 0, dst_port;
pravin shelar655c3de2016-11-13 20:43:55 -08002162 struct dst_entry *ndst = NULL;
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002163 __be32 vni, label;
stephen hemmingerd3428942012-10-01 12:32:35 +00002164 __u8 tos, ttl;
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002165 int ifindex;
Pravin B Shelar0e6fbc5b2013-06-17 17:49:56 -07002166 int err;
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002167 u32 flags = vxlan->cfg.flags;
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01002168 bool udp_sum = false;
Jiri Bencf491e562016-02-02 18:09:16 +01002169 bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
stephen hemmingerd3428942012-10-01 12:32:35 +00002170
Jiri Benc61adedf2015-08-20 13:56:25 +02002171 info = skb_tunnel_info(skb);
Thomas Graf3093fbe2015-07-21 10:44:00 +02002172
Thomas Grafee122c72015-07-21 10:43:58 +02002173 if (rdst) {
pravin shelar0770b532016-11-13 20:43:57 -08002174 dst = &rdst->remote_ip;
2175 if (vxlan_addr_any(dst)) {
2176 if (did_rsc) {
2177 /* short-circuited back to local bridge */
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002178 vxlan_encap_bypass(skb, vxlan, vxlan, default_vni);
pravin shelar0770b532016-11-13 20:43:57 -08002179 return;
2180 }
2181 goto drop;
2182 }
2183
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002184 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002185 vni = (rdst->remote_vni) ? : default_vni;
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002186 ifindex = rdst->remote_ifindex;
Brian Russell11586322017-02-24 17:47:11 +00002187 local_ip = vxlan->cfg.saddr;
Paolo Abenid71785f2016-02-12 15:43:57 +01002188 dst_cache = &rdst->dst_cache;
pravin shelar0770b532016-11-13 20:43:57 -08002189 md->gbp = skb->mark;
Hangbin Liu72f6d712018-04-17 14:11:28 +08002190 if (flags & VXLAN_F_TTL_INHERIT) {
2191 ttl = ip_tunnel_get_ttl(old_iph, skb);
2192 } else {
2193 ttl = vxlan->cfg.ttl;
2194 if (!ttl && vxlan_addr_multicast(dst))
2195 ttl = 1;
2196 }
pravin shelar0770b532016-11-13 20:43:57 -08002197
2198 tos = vxlan->cfg.tos;
2199 if (tos == 1)
2200 tos = ip_tunnel_get_dsfield(old_iph, skb);
2201
2202 if (dst->sa.sa_family == AF_INET)
2203 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
2204 else
2205 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
2206 label = vxlan->cfg.label;
Thomas Grafee122c72015-07-21 10:43:58 +02002207 } else {
2208 if (!info) {
2209 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
2210 dev->name);
2211 goto drop;
2212 }
Jiri Bencb1be00a2015-09-24 13:50:02 +02002213 remote_ip.sa.sa_family = ip_tunnel_info_af(info);
pravin shelar272d96a2016-08-05 17:45:36 -07002214 if (remote_ip.sa.sa_family == AF_INET) {
Jiri Benca725e512015-08-20 13:56:30 +02002215 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
pravin shelar272d96a2016-08-05 17:45:36 -07002216 local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src;
2217 } else {
Jiri Benca725e512015-08-20 13:56:30 +02002218 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
pravin shelar272d96a2016-08-05 17:45:36 -07002219 local_ip.sin6.sin6_addr = info->key.u.ipv6.src;
2220 }
Thomas Grafee122c72015-07-21 10:43:58 +02002221 dst = &remote_ip;
pravin shelar0770b532016-11-13 20:43:57 -08002222 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
2223 vni = tunnel_id_to_key32(info->key.tun_id);
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002224 ifindex = 0;
Paolo Abenid71785f2016-02-12 15:43:57 +01002225 dst_cache = &info->dst_cache;
Pieter Jansen van Vuuren256c87c2018-06-26 21:39:36 -07002226 if (info->options_len &&
2227 info->key.tun_flags & TUNNEL_VXLAN_OPT)
pravin shelar0770b532016-11-13 20:43:57 -08002228 md = ip_tunnel_info_opts(info);
Jiri Benca725e512015-08-20 13:56:30 +02002229 ttl = info->key.ttl;
2230 tos = info->key.tos;
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002231 label = info->key.label;
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01002232 udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
Jiri Benca725e512015-08-20 13:56:30 +02002233 }
pravin shelar0770b532016-11-13 20:43:57 -08002234 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2235 vxlan->cfg.port_max, true);
Jiri Benca725e512015-08-20 13:56:30 +02002236
Jakub Kicinski56de8592017-02-24 11:43:36 -08002237 rcu_read_lock();
Cong Wange4c7ed42013-08-31 13:44:33 +08002238 if (dst->sa.sa_family == AF_INET) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002239 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
pravin shelarc46b7892016-11-13 20:43:54 -08002240 struct rtable *rt;
pravin shelar0770b532016-11-13 20:43:57 -08002241 __be16 df = 0;
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002242
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002243 rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos,
pravin shelar272d96a2016-08-05 17:45:36 -07002244 dst->sin.sin_addr.s_addr,
Brian Russell11586322017-02-24 17:47:11 +00002245 &local_ip.sin.sin_addr.s_addr,
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00002246 dst_port, src_port,
Paolo Abenid71785f2016-02-12 15:43:57 +01002247 dst_cache, info);
David S. Miller8ebd1152016-11-15 16:32:11 -05002248 if (IS_ERR(rt)) {
2249 err = PTR_ERR(rt);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002250 goto tx_error;
David S. Miller8ebd1152016-11-15 16:32:11 -05002251 }
pravin shelarfee1fad2016-11-13 20:43:56 -08002252
Cong Wange4c7ed42013-08-31 13:44:33 +08002253 /* Bypass encapsulation if the destination is local */
pravin shelarfee1fad2016-11-13 20:43:56 -08002254 if (!info) {
2255 err = encap_bypass_if_local(skb, dev, vxlan, dst,
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002256 dst_port, ifindex, vni,
2257 &rt->dst, rt->rt_flags);
pravin shelarfee1fad2016-11-13 20:43:56 -08002258 if (err)
Jakub Kicinski56de8592017-02-24 11:43:36 -08002259 goto out_unlock;
pravin shelarfee1fad2016-11-13 20:43:56 -08002260 } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) {
Alexander Duyck6ceb31c2016-02-19 11:26:31 -08002261 df = htons(IP_DF);
pravin shelarfee1fad2016-11-13 20:43:56 -08002262 }
Alexander Duyck6ceb31c2016-02-19 11:26:31 -08002263
pravin shelarc46b7892016-11-13 20:43:54 -08002264 ndst = &rt->dst;
Stefano Brivio6b4f92a2018-10-12 23:53:59 +02002265 skb_tunnel_check_pmtu(skb, ndst, VXLAN_HEADROOM);
Xin Longa93bf0f2017-12-18 14:20:56 +08002266
Cong Wange4c7ed42013-08-31 13:44:33 +08002267 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2268 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
pravin shelarc46b7892016-11-13 20:43:54 -08002269 err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr),
Jiri Benc54bfd872016-02-16 21:58:58 +01002270 vni, md, flags, udp_sum);
Jiri Bencf491e562016-02-02 18:09:16 +01002271 if (err < 0)
pravin shelarc46b7892016-11-13 20:43:54 -08002272 goto tx_error;
Jiri Bencf491e562016-02-02 18:09:16 +01002273
Brian Russell11586322017-02-24 17:47:11 +00002274 udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr,
Jiri Bencf491e562016-02-02 18:09:16 +01002275 dst->sin.sin_addr.s_addr, tos, ttl, df,
2276 src_port, dst_port, xnet, !udp_sum);
Cong Wange4c7ed42013-08-31 13:44:33 +08002277#if IS_ENABLED(CONFIG_IPV6)
2278 } else {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002279 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
Cong Wange4c7ed42013-08-31 13:44:33 +08002280
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002281 ndst = vxlan6_get_route(vxlan, dev, sock6, skb, ifindex, tos,
pravin shelar272d96a2016-08-05 17:45:36 -07002282 label, &dst->sin6.sin6_addr,
Brian Russell11586322017-02-24 17:47:11 +00002283 &local_ip.sin6.sin6_addr,
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00002284 dst_port, src_port,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002285 dst_cache, info);
Jiri Bence5d4b292015-12-07 13:04:30 +01002286 if (IS_ERR(ndst)) {
David S. Miller8ebd1152016-11-15 16:32:11 -05002287 err = PTR_ERR(ndst);
pravin shelarc46b7892016-11-13 20:43:54 -08002288 ndst = NULL;
Cong Wange4c7ed42013-08-31 13:44:33 +08002289 goto tx_error;
2290 }
pravin shelar655c3de2016-11-13 20:43:55 -08002291
pravin shelarfee1fad2016-11-13 20:43:56 -08002292 if (!info) {
2293 u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
Cong Wange4c7ed42013-08-31 13:44:33 +08002294
pravin shelarfee1fad2016-11-13 20:43:56 -08002295 err = encap_bypass_if_local(skb, dev, vxlan, dst,
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002296 dst_port, ifindex, vni,
2297 ndst, rt6i_flags);
pravin shelarfee1fad2016-11-13 20:43:56 -08002298 if (err)
Jakub Kicinski56de8592017-02-24 11:43:36 -08002299 goto out_unlock;
pravin shelarfee1fad2016-11-13 20:43:56 -08002300 }
Jesse Gross35e2d112016-01-20 16:22:47 -08002301
Stefano Brivio6b4f92a2018-10-12 23:53:59 +02002302 skb_tunnel_check_pmtu(skb, ndst, VXLAN6_HEADROOM);
Xin Longa93bf0f2017-12-18 14:20:56 +08002303
Daniel Borkmann14006152016-03-04 15:15:08 +01002304 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
Cong Wange4c7ed42013-08-31 13:44:33 +08002305 ttl = ttl ? : ip6_dst_hoplimit(ndst);
Jiri Bencf491e562016-02-02 18:09:16 +01002306 skb_scrub_packet(skb, xnet);
2307 err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
Jiri Benc54bfd872016-02-16 21:58:58 +01002308 vni, md, flags, udp_sum);
pravin shelarc46b7892016-11-13 20:43:54 -08002309 if (err < 0)
2310 goto tx_error;
2311
pravin shelar0770b532016-11-13 20:43:57 -08002312 udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev,
Brian Russell11586322017-02-24 17:47:11 +00002313 &local_ip.sin6.sin6_addr,
pravin shelar272d96a2016-08-05 17:45:36 -07002314 &dst->sin6.sin6_addr, tos, ttl,
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002315 label, src_port, dst_port, !udp_sum);
Cong Wange4c7ed42013-08-31 13:44:33 +08002316#endif
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002317 }
Jakub Kicinski56de8592017-02-24 11:43:36 -08002318out_unlock:
2319 rcu_read_unlock();
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002320 return;
stephen hemmingerd3428942012-10-01 12:32:35 +00002321
2322drop:
2323 dev->stats.tx_dropped++;
stephen hemmingerd3428942012-10-01 12:32:35 +00002324 dev_kfree_skb(skb);
pravin shelarc46b7892016-11-13 20:43:54 -08002325 return;
2326
2327tx_error:
Jakub Kicinski56de8592017-02-24 11:43:36 -08002328 rcu_read_unlock();
pravin shelar655c3de2016-11-13 20:43:55 -08002329 if (err == -ELOOP)
2330 dev->stats.collisions++;
2331 else if (err == -ENETUNREACH)
2332 dev->stats.tx_carrier_errors++;
pravin shelarc46b7892016-11-13 20:43:54 -08002333 dst_release(ndst);
2334 dev->stats.tx_errors++;
2335 kfree_skb(skb);
stephen hemmingerd3428942012-10-01 12:32:35 +00002336}
2337
David Stevens66817122013-03-15 04:35:51 +00002338/* Transmit local packets over Vxlan
2339 *
2340 * Outer IP header inherits ECN and DF from inner header.
2341 * Outer UDP destination is the VXLAN assigned port.
2342 * source port is based on hash of flow
2343 */
2344static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2345{
2346 struct vxlan_dev *vxlan = netdev_priv(dev);
Eric Dumazet8f646c92014-01-06 09:54:31 -08002347 struct vxlan_rdst *rdst, *fdst = NULL;
Xin Long8bff36852017-11-11 19:58:50 +08002348 const struct ip_tunnel_info *info;
2349 bool did_rsc = false;
David Stevens66817122013-03-15 04:35:51 +00002350 struct vxlan_fdb *f;
Xin Long8bff36852017-11-11 19:58:50 +08002351 struct ethhdr *eth;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002352 __be32 vni = 0;
David Stevens66817122013-03-15 04:35:51 +00002353
Jiri Benc61adedf2015-08-20 13:56:25 +02002354 info = skb_tunnel_info(skb);
Thomas Graf3093fbe2015-07-21 10:44:00 +02002355
David Stevens66817122013-03-15 04:35:51 +00002356 skb_reset_mac_header(skb);
David Stevens66817122013-03-15 04:35:51 +00002357
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002358 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002359 if (info && info->mode & IP_TUNNEL_INFO_BRIDGE &&
2360 info->mode & IP_TUNNEL_INFO_TX) {
2361 vni = tunnel_id_to_key32(info->key.tun_id);
2362 } else {
2363 if (info && info->mode & IP_TUNNEL_INFO_TX)
2364 vxlan_xmit_one(skb, dev, vni, NULL, false);
2365 else
2366 kfree_skb(skb);
2367 return NETDEV_TX_OK;
2368 }
Jiri Benc47e5d1b2016-04-05 14:47:11 +02002369 }
2370
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002371 if (vxlan->cfg.flags & VXLAN_F_PROXY) {
Jiri Benc47e5d1b2016-04-05 14:47:11 +02002372 eth = eth_hdr(skb);
Cong Wangf564f452013-08-31 13:44:36 +08002373 if (ntohs(eth->h_proto) == ETH_P_ARP)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002374 return arp_reduce(dev, skb, vni);
Cong Wangf564f452013-08-31 13:44:36 +08002375#if IS_ENABLED(CONFIG_IPV6)
Xin Long8bff36852017-11-11 19:58:50 +08002376 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
2377 pskb_may_pull(skb, sizeof(struct ipv6hdr) +
2378 sizeof(struct nd_msg)) &&
2379 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2380 struct nd_msg *m = (struct nd_msg *)(ipv6_hdr(skb) + 1);
2381
2382 if (m->icmph.icmp6_code == 0 &&
2383 m->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02002384 return neigh_reduce(dev, skb, vni);
Cong Wangf564f452013-08-31 13:44:36 +08002385 }
2386#endif
2387 }
David Stevens66817122013-03-15 04:35:51 +00002388
Jiri Benc47e5d1b2016-04-05 14:47:11 +02002389 eth = eth_hdr(skb);
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002390 f = vxlan_find_mac(vxlan, eth->h_dest, vni);
David Stevensae884082013-04-19 00:36:26 +00002391 did_rsc = false;
2392
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002393 if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) &&
Cong Wange15a00a2013-08-31 13:44:34 +08002394 (ntohs(eth->h_proto) == ETH_P_IP ||
2395 ntohs(eth->h_proto) == ETH_P_IPV6)) {
David Stevensae884082013-04-19 00:36:26 +00002396 did_rsc = route_shortcircuit(dev, skb);
2397 if (did_rsc)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002398 f = vxlan_find_mac(vxlan, eth->h_dest, vni);
David Stevensae884082013-04-19 00:36:26 +00002399 }
2400
David Stevens66817122013-03-15 04:35:51 +00002401 if (f == NULL) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002402 f = vxlan_find_mac(vxlan, all_zeros_mac, vni);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002403 if (f == NULL) {
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002404 if ((vxlan->cfg.flags & VXLAN_F_L2MISS) &&
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002405 !is_multicast_ether_addr(eth->h_dest))
2406 vxlan_fdb_miss(vxlan, eth->h_dest);
David Stevens66817122013-03-15 04:35:51 +00002407
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002408 dev->stats.tx_dropped++;
Eric Dumazet8f646c92014-01-06 09:54:31 -08002409 kfree_skb(skb);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002410 return NETDEV_TX_OK;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07002411 }
David Stevens66817122013-03-15 04:35:51 +00002412 }
2413
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002414 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2415 struct sk_buff *skb1;
2416
Eric Dumazet8f646c92014-01-06 09:54:31 -08002417 if (!fdst) {
2418 fdst = rdst;
2419 continue;
2420 }
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002421 skb1 = skb_clone(skb, GFP_ATOMIC);
2422 if (skb1)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002423 vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002424 }
2425
Eric Dumazet8f646c92014-01-06 09:54:31 -08002426 if (fdst)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002427 vxlan_xmit_one(skb, dev, vni, fdst, did_rsc);
Eric Dumazet8f646c92014-01-06 09:54:31 -08002428 else
2429 kfree_skb(skb);
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002430 return NETDEV_TX_OK;
David Stevens66817122013-03-15 04:35:51 +00002431}
2432
stephen hemmingerd3428942012-10-01 12:32:35 +00002433/* Walk the forwarding table and purge stale entries */
Kees Cookdf7e8282017-10-04 16:26:59 -07002434static void vxlan_cleanup(struct timer_list *t)
stephen hemmingerd3428942012-10-01 12:32:35 +00002435{
Kees Cookdf7e8282017-10-04 16:26:59 -07002436 struct vxlan_dev *vxlan = from_timer(vxlan, t, age_timer);
stephen hemmingerd3428942012-10-01 12:32:35 +00002437 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2438 unsigned int h;
2439
2440 if (!netif_running(vxlan->dev))
2441 return;
2442
stephen hemmingerd3428942012-10-01 12:32:35 +00002443 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2444 struct hlist_node *p, *n;
Sorin Dumitru14e1d0f2015-05-26 10:42:04 +03002445
2446 spin_lock_bh(&vxlan->hash_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00002447 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2448 struct vxlan_fdb *f
2449 = container_of(p, struct vxlan_fdb, hlist);
2450 unsigned long timeout;
2451
Balakrishnan Ramanefb5f682017-01-23 20:44:33 -08002452 if (f->state & (NUD_PERMANENT | NUD_NOARP))
stephen hemmingerd3428942012-10-01 12:32:35 +00002453 continue;
2454
Roopa Prabhudef499c2017-03-27 15:46:41 -07002455 if (f->flags & NTF_EXT_LEARNED)
2456 continue;
2457
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002458 timeout = f->used + vxlan->cfg.age_interval * HZ;
stephen hemmingerd3428942012-10-01 12:32:35 +00002459 if (time_before_eq(timeout, jiffies)) {
2460 netdev_dbg(vxlan->dev,
2461 "garbage collect %pM\n",
2462 f->eth_addr);
2463 f->state = NUD_STALE;
Roopa Prabhu4c2438b2018-07-04 16:46:31 -07002464 vxlan_fdb_destroy(vxlan, f, true);
stephen hemmingerd3428942012-10-01 12:32:35 +00002465 } else if (time_before(timeout, next_timer))
2466 next_timer = timeout;
2467 }
Sorin Dumitru14e1d0f2015-05-26 10:42:04 +03002468 spin_unlock_bh(&vxlan->hash_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00002469 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002470
2471 mod_timer(&vxlan->age_timer, next_timer);
2472}
2473
Mark Blocha53cb292017-06-02 03:24:08 +03002474static void vxlan_vs_del_dev(struct vxlan_dev *vxlan)
2475{
2476 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2477
2478 spin_lock(&vn->sock_lock);
Jiri Benc69e76662017-07-02 19:00:57 +02002479 hlist_del_init_rcu(&vxlan->hlist4.hlist);
2480#if IS_ENABLED(CONFIG_IPV6)
2481 hlist_del_init_rcu(&vxlan->hlist6.hlist);
2482#endif
Mark Blocha53cb292017-06-02 03:24:08 +03002483 spin_unlock(&vn->sock_lock);
2484}
2485
Jiri Benc69e76662017-07-02 19:00:57 +02002486static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan,
2487 struct vxlan_dev_node *node)
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002488{
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002489 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Jiri Benc54bfd872016-02-16 21:58:58 +01002490 __be32 vni = vxlan->default_dst.remote_vni;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002491
Jiri Benc69e76662017-07-02 19:00:57 +02002492 node->vxlan = vxlan;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002493 spin_lock(&vn->sock_lock);
Jiri Benc69e76662017-07-02 19:00:57 +02002494 hlist_add_head_rcu(&node->hlist, vni_head(vs, vni));
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002495 spin_unlock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002496}
2497
stephen hemmingerd3428942012-10-01 12:32:35 +00002498/* Setup stats when device is created */
2499static int vxlan_init(struct net_device *dev)
2500{
WANG Cong1c213bd2014-02-13 11:46:28 -08002501 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
Pravin B Shelare8171042013-03-25 14:49:46 +00002502 if (!dev->tstats)
stephen hemmingerd3428942012-10-01 12:32:35 +00002503 return -ENOMEM;
2504
2505 return 0;
2506}
2507
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002508static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni)
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002509{
2510 struct vxlan_fdb *f;
2511
2512 spin_lock_bh(&vxlan->hash_lock);
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002513 f = __vxlan_find_mac(vxlan, all_zeros_mac, vni);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002514 if (f)
Roopa Prabhu4c2438b2018-07-04 16:46:31 -07002515 vxlan_fdb_destroy(vxlan, f, true);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002516 spin_unlock_bh(&vxlan->hash_lock);
2517}
2518
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002519static void vxlan_uninit(struct net_device *dev)
2520{
2521 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002522
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002523 vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002524
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002525 free_percpu(dev->tstats);
2526}
2527
stephen hemmingerd3428942012-10-01 12:32:35 +00002528/* Start ageing timer and join group when device is brought up */
2529static int vxlan_open(struct net_device *dev)
2530{
2531 struct vxlan_dev *vxlan = netdev_priv(dev);
Jiri Benc205f3562015-09-24 13:50:01 +02002532 int ret;
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002533
Jiri Benc205f3562015-09-24 13:50:01 +02002534 ret = vxlan_sock_add(vxlan);
2535 if (ret < 0)
2536 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002537
Gao feng79d4a942013-12-10 16:37:32 +08002538 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002539 ret = vxlan_igmp_join(vxlan);
Marcelo Ricardo Leitnerbef00572015-08-25 20:22:35 -03002540 if (ret == -EADDRINUSE)
2541 ret = 0;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002542 if (ret) {
Jiri Benc205f3562015-09-24 13:50:01 +02002543 vxlan_sock_release(vxlan);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002544 return ret;
2545 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002546 }
2547
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002548 if (vxlan->cfg.age_interval)
stephen hemmingerd3428942012-10-01 12:32:35 +00002549 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2550
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002551 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002552}
2553
2554/* Purge the forwarding table */
Roopa Prabhu8b3f9332017-01-23 20:44:32 -08002555static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all)
stephen hemmingerd3428942012-10-01 12:32:35 +00002556{
Cong Wang31fec5a2013-05-27 22:35:52 +00002557 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002558
2559 spin_lock_bh(&vxlan->hash_lock);
2560 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2561 struct hlist_node *p, *n;
2562 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2563 struct vxlan_fdb *f
2564 = container_of(p, struct vxlan_fdb, hlist);
Roopa Prabhu8b3f9332017-01-23 20:44:32 -08002565 if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP)))
2566 continue;
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002567 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2568 if (!is_zero_ether_addr(f->eth_addr))
Roopa Prabhu4c2438b2018-07-04 16:46:31 -07002569 vxlan_fdb_destroy(vxlan, f, true);
stephen hemmingerd3428942012-10-01 12:32:35 +00002570 }
2571 }
2572 spin_unlock_bh(&vxlan->hash_lock);
2573}
2574
2575/* Cleanup timer and forwarding table on shutdown */
2576static int vxlan_stop(struct net_device *dev)
2577{
2578 struct vxlan_dev *vxlan = netdev_priv(dev);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002579 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002580 int ret = 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00002581
Marcelo Ricardo Leitner24c0e682015-03-23 16:23:12 -03002582 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
WANG Congf13b1682015-04-08 14:48:30 -07002583 !vxlan_group_used(vn, vxlan))
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002584 ret = vxlan_igmp_leave(vxlan);
stephen hemmingerd3428942012-10-01 12:32:35 +00002585
2586 del_timer_sync(&vxlan->age_timer);
2587
Roopa Prabhu8b3f9332017-01-23 20:44:32 -08002588 vxlan_flush(vxlan, false);
Jiri Benc205f3562015-09-24 13:50:01 +02002589 vxlan_sock_release(vxlan);
stephen hemmingerd3428942012-10-01 12:32:35 +00002590
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002591 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002592}
2593
stephen hemmingerd3428942012-10-01 12:32:35 +00002594/* Stub, nothing needs to be done. */
2595static void vxlan_set_multicast_list(struct net_device *dev)
2596{
2597}
2598
Daniel Borkmann345010b2013-12-18 00:21:08 +01002599static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2600{
2601 struct vxlan_dev *vxlan = netdev_priv(dev);
2602 struct vxlan_rdst *dst = &vxlan->default_dst;
David Wragg72564b52016-02-10 00:05:55 +00002603 struct net_device *lowerdev = __dev_get_by_index(vxlan->net,
2604 dst->remote_ifindex);
Matthias Schifferce44a4a2017-06-19 10:03:57 +02002605 bool use_ipv6 = !!(vxlan->cfg.flags & VXLAN_F_IPV6);
Jarod Wilson91572082016-10-20 13:55:20 -04002606
2607 /* This check is different than dev->max_mtu, because it looks at
2608 * the lowerdev->mtu, rather than the static dev->max_mtu
2609 */
2610 if (lowerdev) {
2611 int max_mtu = lowerdev->mtu -
2612 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
2613 if (new_mtu > max_mtu)
2614 return -EINVAL;
2615 }
2616
2617 dev->mtu = new_mtu;
2618 return 0;
Daniel Borkmann345010b2013-12-18 00:21:08 +01002619}
2620
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07002621static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
2622{
2623 struct vxlan_dev *vxlan = netdev_priv(dev);
2624 struct ip_tunnel_info *info = skb_tunnel_info(skb);
2625 __be16 sport, dport;
2626
2627 sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2628 vxlan->cfg.port_max, true);
2629 dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
2630
Jiri Benc239e9442015-12-07 13:04:31 +01002631 if (ip_tunnel_info_af(info) == AF_INET) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002632 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
Jiri Benc1a8496b2016-02-02 18:09:14 +01002633 struct rtable *rt;
2634
pravin shelar655c3de2016-11-13 20:43:55 -08002635 rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos,
Jiri Benc1a8496b2016-02-02 18:09:14 +01002636 info->key.u.ipv4.dst,
Paolo Abeni22f07082017-02-17 19:14:27 +01002637 &info->key.u.ipv4.src, dport, sport,
2638 &info->dst_cache, info);
Jiri Benc1a8496b2016-02-02 18:09:14 +01002639 if (IS_ERR(rt))
2640 return PTR_ERR(rt);
2641 ip_rt_put(rt);
Jiri Benc239e9442015-12-07 13:04:31 +01002642 } else {
2643#if IS_ENABLED(CONFIG_IPV6)
pravin shelar03dc52a2016-11-13 20:43:53 -08002644 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
Jiri Benc239e9442015-12-07 13:04:31 +01002645 struct dst_entry *ndst;
2646
pravin shelar655c3de2016-11-13 20:43:55 -08002647 ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos,
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002648 info->key.label, &info->key.u.ipv6.dst,
Paolo Abeni22f07082017-02-17 19:14:27 +01002649 &info->key.u.ipv6.src, dport, sport,
2650 &info->dst_cache, info);
Jiri Benc239e9442015-12-07 13:04:31 +01002651 if (IS_ERR(ndst))
2652 return PTR_ERR(ndst);
2653 dst_release(ndst);
Jiri Benc239e9442015-12-07 13:04:31 +01002654#else /* !CONFIG_IPV6 */
2655 return -EPFNOSUPPORT;
2656#endif
2657 }
Jiri Benc1a8496b2016-02-02 18:09:14 +01002658 info->key.tp_src = sport;
2659 info->key.tp_dst = dport;
Jiri Benc239e9442015-12-07 13:04:31 +01002660 return 0;
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07002661}
2662
Jiri Benc0c867c92016-04-05 14:47:10 +02002663static const struct net_device_ops vxlan_netdev_ether_ops = {
stephen hemmingerd3428942012-10-01 12:32:35 +00002664 .ndo_init = vxlan_init,
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002665 .ndo_uninit = vxlan_uninit,
stephen hemmingerd3428942012-10-01 12:32:35 +00002666 .ndo_open = vxlan_open,
2667 .ndo_stop = vxlan_stop,
2668 .ndo_start_xmit = vxlan_xmit,
Pravin B Shelare8171042013-03-25 14:49:46 +00002669 .ndo_get_stats64 = ip_tunnel_get_stats64,
stephen hemmingerd3428942012-10-01 12:32:35 +00002670 .ndo_set_rx_mode = vxlan_set_multicast_list,
Daniel Borkmann345010b2013-12-18 00:21:08 +01002671 .ndo_change_mtu = vxlan_change_mtu,
stephen hemmingerd3428942012-10-01 12:32:35 +00002672 .ndo_validate_addr = eth_validate_addr,
2673 .ndo_set_mac_address = eth_mac_addr,
2674 .ndo_fdb_add = vxlan_fdb_add,
2675 .ndo_fdb_del = vxlan_fdb_delete,
2676 .ndo_fdb_dump = vxlan_fdb_dump,
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07002677 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
stephen hemmingerd3428942012-10-01 12:32:35 +00002678};
2679
Jiri Bence1e53142016-04-05 14:47:13 +02002680static const struct net_device_ops vxlan_netdev_raw_ops = {
2681 .ndo_init = vxlan_init,
2682 .ndo_uninit = vxlan_uninit,
2683 .ndo_open = vxlan_open,
2684 .ndo_stop = vxlan_stop,
2685 .ndo_start_xmit = vxlan_xmit,
2686 .ndo_get_stats64 = ip_tunnel_get_stats64,
2687 .ndo_change_mtu = vxlan_change_mtu,
2688 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
2689};
2690
stephen hemmingerd3428942012-10-01 12:32:35 +00002691/* Info for udev, that this is a virtual tunnel endpoint */
2692static struct device_type vxlan_type = {
2693 .name = "vxlan",
2694};
2695
Sabrina Dubrocae5de25d2016-07-11 13:12:28 +02002696/* Calls the ndo_udp_tunnel_add of the caller in order to
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002697 * supply the listening VXLAN udp ports. Callers are expected
Sabrina Dubrocae5de25d2016-07-11 13:12:28 +02002698 * to implement the ndo_udp_tunnel_add.
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002699 */
Sabrina Dubroca2d2b13f2017-07-21 12:49:32 +02002700static void vxlan_offload_rx_ports(struct net_device *dev, bool push)
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002701{
2702 struct vxlan_sock *vs;
2703 struct net *net = dev_net(dev);
2704 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002705 unsigned int i;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002706
2707 spin_lock(&vn->sock_lock);
2708 for (i = 0; i < PORT_HASH_SIZE; ++i) {
Sabrina Dubroca2d2b13f2017-07-21 12:49:32 +02002709 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2710 unsigned short type;
2711
2712 if (vs->flags & VXLAN_F_GPE)
2713 type = UDP_TUNNEL_TYPE_VXLAN_GPE;
2714 else
2715 type = UDP_TUNNEL_TYPE_VXLAN;
2716
2717 if (push)
2718 udp_tunnel_push_rx_port(dev, vs->sock, type);
2719 else
2720 udp_tunnel_drop_rx_port(dev, vs->sock, type);
2721 }
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002722 }
2723 spin_unlock(&vn->sock_lock);
2724}
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002725
stephen hemmingerd3428942012-10-01 12:32:35 +00002726/* Initialize the device structure. */
2727static void vxlan_setup(struct net_device *dev)
2728{
2729 struct vxlan_dev *vxlan = netdev_priv(dev);
Cong Wang31fec5a2013-05-27 22:35:52 +00002730 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002731
Jiri Benc65226ef2016-04-28 16:36:30 +02002732 eth_hw_addr_random(dev);
2733 ether_setup(dev);
2734
David S. Millercf124db2017-05-08 12:52:56 -04002735 dev->needs_free_netdev = true;
stephen hemmingerd3428942012-10-01 12:32:35 +00002736 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2737
stephen hemmingerd3428942012-10-01 12:32:35 +00002738 dev->features |= NETIF_F_LLTX;
Joseph Gasparakisd6727fe2012-12-07 14:14:16 +00002739 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002740 dev->features |= NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002741 dev->features |= NETIF_F_GSO_SOFTWARE;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002742
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07002743 dev->vlan_features = dev->features;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002744 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002745 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
Eric Dumazet02875872014-10-05 18:38:35 -07002746 netif_keep_dst(dev);
Jiri Benc0c867c92016-04-05 14:47:10 +02002747 dev->priv_flags |= IFF_NO_QUEUE;
stephen hemmingerd3428942012-10-01 12:32:35 +00002748
Matthias Schiffera9853432017-06-19 10:03:55 +02002749 /* MTU range: 68 - 65535 */
2750 dev->min_mtu = ETH_MIN_MTU;
2751 dev->max_mtu = ETH_MAX_MTU;
2752
stephen hemminger553675f2013-05-16 11:35:20 +00002753 INIT_LIST_HEAD(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00002754 spin_lock_init(&vxlan->hash_lock);
2755
Kees Cookdf7e8282017-10-04 16:26:59 -07002756 timer_setup(&vxlan->age_timer, vxlan_cleanup, TIMER_DEFERRABLE);
stephen hemmingerd3428942012-10-01 12:32:35 +00002757
2758 vxlan->dev = dev;
2759
Tom Herbert58ce31c2015-08-19 17:07:33 -07002760 gro_cells_init(&vxlan->gro_cells, dev);
2761
stephen hemmingerd3428942012-10-01 12:32:35 +00002762 for (h = 0; h < FDB_HASH_SIZE; ++h)
2763 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2764}
2765
Jiri Benc0c867c92016-04-05 14:47:10 +02002766static void vxlan_ether_setup(struct net_device *dev)
2767{
Jiri Benc0c867c92016-04-05 14:47:10 +02002768 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
2769 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2770 dev->netdev_ops = &vxlan_netdev_ether_ops;
2771}
2772
Jiri Bence1e53142016-04-05 14:47:13 +02002773static void vxlan_raw_setup(struct net_device *dev)
2774{
Jiri Benc65226ef2016-04-28 16:36:30 +02002775 dev->header_ops = NULL;
Jiri Bence1e53142016-04-05 14:47:13 +02002776 dev->type = ARPHRD_NONE;
2777 dev->hard_header_len = 0;
2778 dev->addr_len = 0;
Jiri Bence1e53142016-04-05 14:47:13 +02002779 dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2780 dev->netdev_ops = &vxlan_netdev_raw_ops;
2781}
2782
stephen hemmingerd3428942012-10-01 12:32:35 +00002783static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2784 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
stephen hemminger5d174dd2013-04-27 11:31:55 +00002785 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002786 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002787 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2788 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002789 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002790 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2791 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002792 [IFLA_VXLAN_LABEL] = { .type = NLA_U32 },
stephen hemmingerd3428942012-10-01 12:32:35 +00002793 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2794 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2795 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
stephen hemminger05f47d62012-10-09 20:35:50 +00002796 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
David Stevense4f67ad2012-11-20 02:50:14 +00002797 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2798 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2799 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2800 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
Alexei Starovoitovf8a9b1b2015-07-30 20:10:22 -07002801 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
stephen hemminger823aa872013-04-27 11:31:57 +00002802 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
Tom Herbert5c91ae02014-11-06 18:06:01 -08002803 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2804 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2805 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
Tom Herbertdfd86452015-01-12 17:00:38 -08002806 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2807 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
Thomas Graf35114942015-01-15 03:53:55 +01002808 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
Jiri Bence1e53142016-04-05 14:47:13 +02002809 [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, },
Tom Herbert0ace2ca2015-02-10 16:30:32 -08002810 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
Hangbin Liu72f6d712018-04-17 14:11:28 +08002811 [IFLA_VXLAN_TTL_INHERIT] = { .type = NLA_FLAG },
stephen hemmingerd3428942012-10-01 12:32:35 +00002812};
2813
Matthias Schiffera8b8a8892017-06-25 23:56:01 +02002814static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[],
2815 struct netlink_ext_ack *extack)
stephen hemmingerd3428942012-10-01 12:32:35 +00002816{
2817 if (tb[IFLA_ADDRESS]) {
2818 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002819 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
2820 "Provided link layer address is not Ethernet");
stephen hemmingerd3428942012-10-01 12:32:35 +00002821 return -EINVAL;
2822 }
2823
2824 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002825 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
2826 "Provided Ethernet address is not unicast");
stephen hemmingerd3428942012-10-01 12:32:35 +00002827 return -EADDRNOTAVAIL;
2828 }
2829 }
2830
Matthias Schiffera9853432017-06-19 10:03:55 +02002831 if (tb[IFLA_MTU]) {
Matthias Schiffer019b13a2017-06-27 14:42:43 +02002832 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
Matthias Schiffera9853432017-06-19 10:03:55 +02002833
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002834 if (mtu < ETH_MIN_MTU || mtu > ETH_MAX_MTU) {
2835 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_MTU],
2836 "MTU must be between 68 and 65535");
Matthias Schiffera9853432017-06-19 10:03:55 +02002837 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002838 }
Matthias Schiffera9853432017-06-19 10:03:55 +02002839 }
2840
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002841 if (!data) {
2842 NL_SET_ERR_MSG(extack,
2843 "Required attributes not provided to perform the operation");
stephen hemmingerd3428942012-10-01 12:32:35 +00002844 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002845 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002846
2847 if (data[IFLA_VXLAN_ID]) {
Matthias Schiffera9853432017-06-19 10:03:55 +02002848 u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2849
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002850 if (id >= VXLAN_N_VID) {
2851 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_ID],
2852 "VXLAN ID must be lower than 16777216");
stephen hemmingerd3428942012-10-01 12:32:35 +00002853 return -ERANGE;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002854 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002855 }
2856
stephen hemminger05f47d62012-10-09 20:35:50 +00002857 if (data[IFLA_VXLAN_PORT_RANGE]) {
2858 const struct ifla_vxlan_port_range *p
2859 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2860
2861 if (ntohs(p->high) < ntohs(p->low)) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002862 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT_RANGE],
2863 "Invalid source port range");
stephen hemminger05f47d62012-10-09 20:35:50 +00002864 return -EINVAL;
2865 }
2866 }
2867
stephen hemmingerd3428942012-10-01 12:32:35 +00002868 return 0;
2869}
2870
Yan Burman1b13c972013-01-29 23:43:07 +00002871static void vxlan_get_drvinfo(struct net_device *netdev,
2872 struct ethtool_drvinfo *drvinfo)
2873{
2874 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2875 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2876}
2877
2878static const struct ethtool_ops vxlan_ethtool_ops = {
2879 .get_drvinfo = vxlan_get_drvinfo,
2880 .get_link = ethtool_op_get_link,
2881};
2882
Tom Herbert3ee64f32014-07-13 19:49:42 -07002883static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2884 __be16 port, u32 flags)
stephen hemminger553675f2013-05-16 11:35:20 +00002885{
Cong Wange4c7ed42013-08-31 13:44:33 +08002886 struct socket *sock;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002887 struct udp_port_cfg udp_conf;
2888 int err;
Cong Wange4c7ed42013-08-31 13:44:33 +08002889
Tom Herbert3ee64f32014-07-13 19:49:42 -07002890 memset(&udp_conf, 0, sizeof(udp_conf));
2891
2892 if (ipv6) {
2893 udp_conf.family = AF_INET6;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002894 udp_conf.use_udp6_rx_checksums =
Alexander Duyck3dc2b6a2014-11-24 20:08:38 -08002895 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
Jiri Benca43a9ef2015-08-28 20:48:22 +02002896 udp_conf.ipv6_v6only = 1;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002897 } else {
2898 udp_conf.family = AF_INET;
Cong Wange4c7ed42013-08-31 13:44:33 +08002899 }
2900
Tom Herbert3ee64f32014-07-13 19:49:42 -07002901 udp_conf.local_udp_port = port;
Cong Wange4c7ed42013-08-31 13:44:33 +08002902
Tom Herbert3ee64f32014-07-13 19:49:42 -07002903 /* Open UDP socket */
2904 err = udp_sock_create(net, &udp_conf, &sock);
2905 if (err < 0)
2906 return ERR_PTR(err);
Cong Wange4c7ed42013-08-31 13:44:33 +08002907
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002908 return sock;
Cong Wange4c7ed42013-08-31 13:44:33 +08002909}
2910
2911/* Create new listen socket if needed */
Jiri Bencb1be00a2015-09-24 13:50:02 +02002912static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
2913 __be16 port, u32 flags)
Cong Wange4c7ed42013-08-31 13:44:33 +08002914{
2915 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2916 struct vxlan_sock *vs;
2917 struct socket *sock;
Cong Wang31fec5a2013-05-27 22:35:52 +00002918 unsigned int h;
Andy Zhouacbf74a2014-09-16 17:31:18 -07002919 struct udp_tunnel_sock_cfg tunnel_cfg;
stephen hemminger553675f2013-05-16 11:35:20 +00002920
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02002921 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
Cong Wange4c7ed42013-08-31 13:44:33 +08002922 if (!vs)
stephen hemminger553675f2013-05-16 11:35:20 +00002923 return ERR_PTR(-ENOMEM);
2924
2925 for (h = 0; h < VNI_HASH_SIZE; ++h)
2926 INIT_HLIST_HEAD(&vs->vni_list[h]);
2927
Tom Herbert3ee64f32014-07-13 19:49:42 -07002928 sock = vxlan_create_sock(net, ipv6, port, flags);
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002929 if (IS_ERR(sock)) {
stephen hemminger553675f2013-05-16 11:35:20 +00002930 kfree(vs);
Duan Jionge50fddc2013-11-01 13:09:43 +08002931 return ERR_CAST(sock);
stephen hemminger553675f2013-05-16 11:35:20 +00002932 }
2933
Cong Wange4c7ed42013-08-31 13:44:33 +08002934 vs->sock = sock;
Reshetova, Elena66af8462017-07-04 15:52:59 +03002935 refcount_set(&vs->refcnt, 1);
Tom Herbertaf33c1a2015-01-20 11:23:05 -08002936 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
stephen hemminger553675f2013-05-16 11:35:20 +00002937
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002938 spin_lock(&vn->sock_lock);
2939 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
Alexander Duycke7b3db52016-06-16 12:20:52 -07002940 udp_tunnel_notify_add_rx_port(sock,
Alexander Duyckb9adcd692016-06-16 12:23:19 -07002941 (vs->flags & VXLAN_F_GPE) ?
2942 UDP_TUNNEL_TYPE_VXLAN_GPE :
Alexander Duycke7b3db52016-06-16 12:20:52 -07002943 UDP_TUNNEL_TYPE_VXLAN);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002944 spin_unlock(&vn->sock_lock);
stephen hemminger553675f2013-05-16 11:35:20 +00002945
2946 /* Mark socket as an encapsulation socket. */
Tom Herbert5602c482016-04-05 08:22:53 -07002947 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
Andy Zhouacbf74a2014-09-16 17:31:18 -07002948 tunnel_cfg.sk_user_data = vs;
2949 tunnel_cfg.encap_type = 1;
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01002950 tunnel_cfg.encap_rcv = vxlan_rcv;
Andy Zhouacbf74a2014-09-16 17:31:18 -07002951 tunnel_cfg.encap_destroy = NULL;
Tom Herbert5602c482016-04-05 08:22:53 -07002952 tunnel_cfg.gro_receive = vxlan_gro_receive;
2953 tunnel_cfg.gro_complete = vxlan_gro_complete;
Andy Zhouacbf74a2014-09-16 17:31:18 -07002954
2955 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
Cong Wange4c7ed42013-08-31 13:44:33 +08002956
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002957 return vs;
2958}
stephen hemminger553675f2013-05-16 11:35:20 +00002959
Jiri Bencb1be00a2015-09-24 13:50:02 +02002960static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6)
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002961{
Jiri Benc205f3562015-09-24 13:50:01 +02002962 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2963 struct vxlan_sock *vs = NULL;
Jiri Benc69e76662017-07-02 19:00:57 +02002964 struct vxlan_dev_node *node;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002965
Jiri Benc205f3562015-09-24 13:50:01 +02002966 if (!vxlan->cfg.no_share) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002967 spin_lock(&vn->sock_lock);
Jiri Benc205f3562015-09-24 13:50:01 +02002968 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002969 vxlan->cfg.dst_port, vxlan->cfg.flags);
Reshetova, Elena66af8462017-07-04 15:52:59 +03002970 if (vs && !refcount_inc_not_zero(&vs->refcnt)) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002971 spin_unlock(&vn->sock_lock);
Jiri Benc205f3562015-09-24 13:50:01 +02002972 return -EBUSY;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002973 }
2974 spin_unlock(&vn->sock_lock);
2975 }
Jiri Benc205f3562015-09-24 13:50:01 +02002976 if (!vs)
Jiri Bencb1be00a2015-09-24 13:50:02 +02002977 vs = vxlan_socket_create(vxlan->net, ipv6,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002978 vxlan->cfg.dst_port, vxlan->cfg.flags);
Jiri Benc205f3562015-09-24 13:50:01 +02002979 if (IS_ERR(vs))
2980 return PTR_ERR(vs);
Jiri Bencb1be00a2015-09-24 13:50:02 +02002981#if IS_ENABLED(CONFIG_IPV6)
Jiri Benc69e76662017-07-02 19:00:57 +02002982 if (ipv6) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002983 rcu_assign_pointer(vxlan->vn6_sock, vs);
Jiri Benc69e76662017-07-02 19:00:57 +02002984 node = &vxlan->hlist6;
2985 } else
Jiri Bencb1be00a2015-09-24 13:50:02 +02002986#endif
Jiri Benc69e76662017-07-02 19:00:57 +02002987 {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002988 rcu_assign_pointer(vxlan->vn4_sock, vs);
Jiri Benc69e76662017-07-02 19:00:57 +02002989 node = &vxlan->hlist4;
2990 }
2991 vxlan_vs_add_dev(vs, vxlan, node);
Jiri Benc205f3562015-09-24 13:50:01 +02002992 return 0;
stephen hemminger553675f2013-05-16 11:35:20 +00002993}
2994
Jiri Bencb1be00a2015-09-24 13:50:02 +02002995static int vxlan_sock_add(struct vxlan_dev *vxlan)
2996{
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002997 bool metadata = vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA;
2998 bool ipv6 = vxlan->cfg.flags & VXLAN_F_IPV6 || metadata;
Jiri Bencd074bf92017-04-27 21:24:35 +02002999 bool ipv4 = !ipv6 || metadata;
Jiri Bencb1be00a2015-09-24 13:50:02 +02003000 int ret = 0;
3001
pravin shelarc6fcc4f2016-10-28 09:59:15 -07003002 RCU_INIT_POINTER(vxlan->vn4_sock, NULL);
Jiri Bencb1be00a2015-09-24 13:50:02 +02003003#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07003004 RCU_INIT_POINTER(vxlan->vn6_sock, NULL);
Jiri Bencd074bf92017-04-27 21:24:35 +02003005 if (ipv6) {
Jiri Bencb1be00a2015-09-24 13:50:02 +02003006 ret = __vxlan_sock_add(vxlan, true);
Jiri Bencd074bf92017-04-27 21:24:35 +02003007 if (ret < 0 && ret != -EAFNOSUPPORT)
3008 ipv4 = false;
3009 }
Jiri Bencb1be00a2015-09-24 13:50:02 +02003010#endif
Jiri Bencd074bf92017-04-27 21:24:35 +02003011 if (ipv4)
Jiri Bencb1be00a2015-09-24 13:50:02 +02003012 ret = __vxlan_sock_add(vxlan, false);
3013 if (ret < 0)
3014 vxlan_sock_release(vxlan);
3015 return ret;
3016}
3017
Matthias Schiffera9853432017-06-19 10:03:55 +02003018static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf,
3019 struct net_device **lower,
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003020 struct vxlan_dev *old,
3021 struct netlink_ext_ack *extack)
stephen hemmingerd3428942012-10-01 12:32:35 +00003022{
Nicolas Dichtel33564bb2015-01-26 22:28:14 +01003023 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
Matthias Schiffera9853432017-06-19 10:03:55 +02003024 struct vxlan_dev *tmp;
3025 bool use_ipv6 = false;
3026
3027 if (conf->flags & VXLAN_F_GPE) {
3028 /* For now, allow GPE only together with
3029 * COLLECT_METADATA. This can be relaxed later; in such
3030 * case, the other side of the PtP link will have to be
3031 * provided.
3032 */
3033 if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) ||
3034 !(conf->flags & VXLAN_F_COLLECT_METADATA)) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003035 NL_SET_ERR_MSG(extack,
3036 "VXLAN GPE does not support this combination of attributes");
Matthias Schiffera9853432017-06-19 10:03:55 +02003037 return -EINVAL;
3038 }
3039 }
3040
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003041 if (!conf->remote_ip.sa.sa_family && !conf->saddr.sa.sa_family) {
3042 /* Unless IPv6 is explicitly requested, assume IPv4 */
Matthias Schiffera9853432017-06-19 10:03:55 +02003043 conf->remote_ip.sa.sa_family = AF_INET;
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003044 conf->saddr.sa.sa_family = AF_INET;
3045 } else if (!conf->remote_ip.sa.sa_family) {
3046 conf->remote_ip.sa.sa_family = conf->saddr.sa.sa_family;
3047 } else if (!conf->saddr.sa.sa_family) {
3048 conf->saddr.sa.sa_family = conf->remote_ip.sa.sa_family;
3049 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003050
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003051 if (conf->saddr.sa.sa_family != conf->remote_ip.sa.sa_family) {
3052 NL_SET_ERR_MSG(extack,
3053 "Local and remote address must be from the same family");
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003054 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003055 }
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003056
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003057 if (vxlan_addr_multicast(&conf->saddr)) {
3058 NL_SET_ERR_MSG(extack, "Local address cannot be multicast");
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003059 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003060 }
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003061
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003062 if (conf->saddr.sa.sa_family == AF_INET6) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003063 if (!IS_ENABLED(CONFIG_IPV6)) {
3064 NL_SET_ERR_MSG(extack,
3065 "IPv6 support not enabled in the kernel");
Matthias Schiffera9853432017-06-19 10:03:55 +02003066 return -EPFNOSUPPORT;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003067 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003068 use_ipv6 = true;
3069 conf->flags |= VXLAN_F_IPV6;
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003070
3071 if (!(conf->flags & VXLAN_F_COLLECT_METADATA)) {
3072 int local_type =
3073 ipv6_addr_type(&conf->saddr.sin6.sin6_addr);
3074 int remote_type =
3075 ipv6_addr_type(&conf->remote_ip.sin6.sin6_addr);
3076
3077 if (local_type & IPV6_ADDR_LINKLOCAL) {
3078 if (!(remote_type & IPV6_ADDR_LINKLOCAL) &&
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003079 (remote_type != IPV6_ADDR_ANY)) {
3080 NL_SET_ERR_MSG(extack,
3081 "Invalid combination of local and remote address scopes");
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003082 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003083 }
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003084
3085 conf->flags |= VXLAN_F_IPV6_LINKLOCAL;
3086 } else {
3087 if (remote_type ==
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003088 (IPV6_ADDR_UNICAST | IPV6_ADDR_LINKLOCAL)) {
3089 NL_SET_ERR_MSG(extack,
3090 "Invalid combination of local and remote address scopes");
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003091 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003092 }
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003093
3094 conf->flags &= ~VXLAN_F_IPV6_LINKLOCAL;
3095 }
3096 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003097 }
3098
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003099 if (conf->label && !use_ipv6) {
3100 NL_SET_ERR_MSG(extack,
3101 "Label attribute only applies to IPv6 VXLAN devices");
Matthias Schiffera9853432017-06-19 10:03:55 +02003102 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003103 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003104
3105 if (conf->remote_ifindex) {
3106 struct net_device *lowerdev;
3107
3108 lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex);
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003109 if (!lowerdev) {
3110 NL_SET_ERR_MSG(extack,
3111 "Invalid local interface, device not found");
Matthias Schiffera9853432017-06-19 10:03:55 +02003112 return -ENODEV;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003113 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003114
3115#if IS_ENABLED(CONFIG_IPV6)
3116 if (use_ipv6) {
3117 struct inet6_dev *idev = __in6_dev_get(lowerdev);
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003118 if (idev && idev->cnf.disable_ipv6) {
3119 NL_SET_ERR_MSG(extack,
3120 "IPv6 support disabled by administrator");
Matthias Schiffera9853432017-06-19 10:03:55 +02003121 return -EPERM;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003122 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003123 }
3124#endif
3125
3126 *lower = lowerdev;
3127 } else {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003128 if (vxlan_addr_multicast(&conf->remote_ip)) {
3129 NL_SET_ERR_MSG(extack,
3130 "Local interface required for multicast remote destination");
3131
Matthias Schiffera9853432017-06-19 10:03:55 +02003132 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003133 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003134
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003135#if IS_ENABLED(CONFIG_IPV6)
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003136 if (conf->flags & VXLAN_F_IPV6_LINKLOCAL) {
3137 NL_SET_ERR_MSG(extack,
3138 "Local interface required for link-local local/remote addresses");
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003139 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003140 }
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003141#endif
3142
Matthias Schiffera9853432017-06-19 10:03:55 +02003143 *lower = NULL;
3144 }
3145
3146 if (!conf->dst_port) {
3147 if (conf->flags & VXLAN_F_GPE)
3148 conf->dst_port = htons(4790); /* IANA VXLAN-GPE port */
3149 else
3150 conf->dst_port = htons(vxlan_port);
3151 }
3152
3153 if (!conf->age_interval)
3154 conf->age_interval = FDB_AGE_DEFAULT;
3155
3156 list_for_each_entry(tmp, &vn->vxlan_list, next) {
3157 if (tmp == old)
3158 continue;
3159
Matthias Schiffer49f810f2017-06-19 10:04:00 +02003160 if (tmp->cfg.vni != conf->vni)
3161 continue;
3162 if (tmp->cfg.dst_port != conf->dst_port)
3163 continue;
3164 if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) !=
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003165 (conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)))
Matthias Schiffer49f810f2017-06-19 10:04:00 +02003166 continue;
3167
3168 if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) &&
3169 tmp->cfg.remote_ifindex != conf->remote_ifindex)
3170 continue;
3171
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003172 NL_SET_ERR_MSG(extack,
3173 "A VXLAN device with the specified VNI already exists");
Matthias Schiffer49f810f2017-06-19 10:04:00 +02003174 return -EEXIST;
Matthias Schiffera9853432017-06-19 10:03:55 +02003175 }
3176
3177 return 0;
3178}
3179
3180static void vxlan_config_apply(struct net_device *dev,
3181 struct vxlan_config *conf,
Sabrina Dubroca889ce932017-06-30 15:50:00 +02003182 struct net_device *lowerdev,
3183 struct net *src_net,
3184 bool changelink)
Matthias Schiffera9853432017-06-19 10:03:55 +02003185{
3186 struct vxlan_dev *vxlan = netdev_priv(dev);
Atzm Watanabec7995c42013-04-16 02:50:52 +00003187 struct vxlan_rdst *dst = &vxlan->default_dst;
Jiri Bencb1be00a2015-09-24 13:50:02 +02003188 unsigned short needed_headroom = ETH_HLEN;
Matthias Schiffera9853432017-06-19 10:03:55 +02003189 bool use_ipv6 = !!(conf->flags & VXLAN_F_IPV6);
3190 int max_mtu = ETH_MAX_MTU;
stephen hemmingerd3428942012-10-01 12:32:35 +00003191
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003192 if (!changelink) {
Matthias Schiffera9853432017-06-19 10:03:55 +02003193 if (conf->flags & VXLAN_F_GPE)
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003194 vxlan_raw_setup(dev);
Matthias Schiffera9853432017-06-19 10:03:55 +02003195 else
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003196 vxlan_ether_setup(dev);
Jiri Bence1e53142016-04-05 14:47:13 +02003197
Matthias Schiffera9853432017-06-19 10:03:55 +02003198 if (conf->mtu)
3199 dev->mtu = conf->mtu;
Sabrina Dubroca889ce932017-06-30 15:50:00 +02003200
3201 vxlan->net = src_net;
Jiri Bence1e53142016-04-05 14:47:13 +02003202 }
Jiri Benc0c867c92016-04-05 14:47:10 +02003203
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003204 dst->remote_vni = conf->vni;
3205
3206 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
stephen hemmingerd3428942012-10-01 12:32:35 +00003207
Matthias Schiffera9853432017-06-19 10:03:55 +02003208 if (lowerdev) {
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003209 dst->remote_ifindex = conf->remote_ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +00003210
Felix Manlunasd6acfeb2017-03-29 17:56:43 -07003211 dev->gso_max_size = lowerdev->gso_max_size;
3212 dev->gso_max_segs = lowerdev->gso_max_segs;
Matthias Schiffera9853432017-06-19 10:03:55 +02003213
3214 needed_headroom = lowerdev->hard_header_len;
3215
3216 max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM :
3217 VXLAN_HEADROOM);
Alexey Kodanevf870c1f2017-12-14 20:20:00 +03003218 if (max_mtu < ETH_MIN_MTU)
3219 max_mtu = ETH_MIN_MTU;
3220
3221 if (!changelink && !conf->mtu)
3222 dev->mtu = max_mtu;
Felix Manlunasd6acfeb2017-03-29 17:56:43 -07003223 }
3224
Matthias Schiffera9853432017-06-19 10:03:55 +02003225 if (dev->mtu > max_mtu)
3226 dev->mtu = max_mtu;
David Wragg7e059152016-02-10 00:05:58 +00003227
Jiri Bencb1be00a2015-09-24 13:50:02 +02003228 if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
3229 needed_headroom += VXLAN6_HEADROOM;
3230 else
3231 needed_headroom += VXLAN_HEADROOM;
3232 dev->needed_headroom = needed_headroom;
3233
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003234 memcpy(&vxlan->cfg, conf, sizeof(*conf));
Matthias Schiffera9853432017-06-19 10:03:55 +02003235}
stephen hemmingerd3428942012-10-01 12:32:35 +00003236
Matthias Schiffera9853432017-06-19 10:03:55 +02003237static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003238 struct vxlan_config *conf, bool changelink,
3239 struct netlink_ext_ack *extack)
Matthias Schiffera9853432017-06-19 10:03:55 +02003240{
3241 struct vxlan_dev *vxlan = netdev_priv(dev);
3242 struct net_device *lowerdev;
3243 int ret;
Vincent Bernatafb97182012-10-30 10:27:16 +00003244
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003245 ret = vxlan_config_validate(src_net, conf, &lowerdev, vxlan, extack);
Matthias Schiffera9853432017-06-19 10:03:55 +02003246 if (ret)
3247 return ret;
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003248
Sabrina Dubroca889ce932017-06-30 15:50:00 +02003249 vxlan_config_apply(dev, conf, lowerdev, src_net, changelink);
stephen hemminger553675f2013-05-16 11:35:20 +00003250
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003251 return 0;
3252}
3253
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003254static int __vxlan_dev_create(struct net *net, struct net_device *dev,
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003255 struct vxlan_config *conf,
3256 struct netlink_ext_ack *extack)
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003257{
3258 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3259 struct vxlan_dev *vxlan = netdev_priv(dev);
Roopa Prabhu0241b832018-07-04 16:46:32 -07003260 struct vxlan_fdb *f = NULL;
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003261 int err;
3262
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003263 err = vxlan_dev_configure(net, dev, conf, false, extack);
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003264 if (err)
3265 return err;
3266
3267 dev->ethtool_ops = &vxlan_ethtool_ops;
3268
3269 /* create an fdb entry for a valid default destination */
3270 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
Roopa Prabhu0241b832018-07-04 16:46:32 -07003271 err = vxlan_fdb_create(vxlan, all_zeros_mac,
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003272 &vxlan->default_dst.remote_ip,
3273 NUD_REACHABLE | NUD_PERMANENT,
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003274 vxlan->cfg.dst_port,
3275 vxlan->default_dst.remote_vni,
3276 vxlan->default_dst.remote_vni,
3277 vxlan->default_dst.remote_ifindex,
Roopa Prabhu0241b832018-07-04 16:46:32 -07003278 NTF_SELF, &f);
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003279 if (err)
3280 return err;
3281 }
3282
3283 err = register_netdevice(dev);
Roopa Prabhu0241b832018-07-04 16:46:32 -07003284 if (err)
3285 goto errout;
3286
3287 err = rtnl_configure_link(dev, NULL);
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003288 if (err) {
Roopa Prabhu0241b832018-07-04 16:46:32 -07003289 unregister_netdevice(dev);
3290 goto errout;
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003291 }
3292
Roopa Prabhu0241b832018-07-04 16:46:32 -07003293 /* notify default fdb entry */
3294 if (f)
3295 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_NEWNEIGH);
3296
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003297 list_add(&vxlan->next, &vn->vxlan_list);
3298 return 0;
Roopa Prabhu0241b832018-07-04 16:46:32 -07003299errout:
3300 if (f)
3301 vxlan_fdb_destroy(vxlan, f, false);
3302 return err;
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003303}
3304
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003305static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
3306 struct net_device *dev, struct vxlan_config *conf,
3307 bool changelink)
3308{
3309 struct vxlan_dev *vxlan = netdev_priv(dev);
3310
3311 memset(conf, 0, sizeof(*conf));
3312
3313 /* if changelink operation, start with old existing cfg */
3314 if (changelink)
3315 memcpy(conf, &vxlan->cfg, sizeof(*conf));
3316
3317 if (data[IFLA_VXLAN_ID]) {
3318 __be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
3319
3320 if (changelink && (vni != conf->vni))
3321 return -EOPNOTSUPP;
3322 conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
3323 }
3324
3325 if (data[IFLA_VXLAN_GROUP]) {
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003326 if (changelink && (conf->remote_ip.sa.sa_family != AF_INET))
3327 return -EOPNOTSUPP;
3328
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003329 conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003330 conf->remote_ip.sa.sa_family = AF_INET;
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003331 } else if (data[IFLA_VXLAN_GROUP6]) {
3332 if (!IS_ENABLED(CONFIG_IPV6))
3333 return -EPFNOSUPPORT;
3334
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003335 if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6))
3336 return -EOPNOTSUPP;
3337
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003338 conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
3339 conf->remote_ip.sa.sa_family = AF_INET6;
3340 }
3341
3342 if (data[IFLA_VXLAN_LOCAL]) {
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003343 if (changelink && (conf->saddr.sa.sa_family != AF_INET))
3344 return -EOPNOTSUPP;
3345
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003346 conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
3347 conf->saddr.sa.sa_family = AF_INET;
3348 } else if (data[IFLA_VXLAN_LOCAL6]) {
3349 if (!IS_ENABLED(CONFIG_IPV6))
3350 return -EPFNOSUPPORT;
3351
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003352 if (changelink && (conf->saddr.sa.sa_family != AF_INET6))
3353 return -EOPNOTSUPP;
3354
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003355 /* TODO: respect scope id */
3356 conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
3357 conf->saddr.sa.sa_family = AF_INET6;
3358 }
3359
3360 if (data[IFLA_VXLAN_LINK])
3361 conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
3362
3363 if (data[IFLA_VXLAN_TOS])
3364 conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
3365
3366 if (data[IFLA_VXLAN_TTL])
3367 conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
3368
Hangbin Liu72f6d712018-04-17 14:11:28 +08003369 if (data[IFLA_VXLAN_TTL_INHERIT]) {
3370 if (changelink)
3371 return -EOPNOTSUPP;
3372 conf->flags |= VXLAN_F_TTL_INHERIT;
3373 }
3374
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003375 if (data[IFLA_VXLAN_LABEL])
3376 conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) &
3377 IPV6_FLOWLABEL_MASK;
3378
3379 if (data[IFLA_VXLAN_LEARNING]) {
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003380 if (nla_get_u8(data[IFLA_VXLAN_LEARNING]))
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003381 conf->flags |= VXLAN_F_LEARN;
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003382 else
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003383 conf->flags &= ~VXLAN_F_LEARN;
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003384 } else if (!changelink) {
3385 /* default to learn on a new device */
3386 conf->flags |= VXLAN_F_LEARN;
3387 }
3388
3389 if (data[IFLA_VXLAN_AGEING]) {
3390 if (changelink)
3391 return -EOPNOTSUPP;
3392 conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
3393 }
3394
3395 if (data[IFLA_VXLAN_PROXY]) {
3396 if (changelink)
3397 return -EOPNOTSUPP;
3398 if (nla_get_u8(data[IFLA_VXLAN_PROXY]))
3399 conf->flags |= VXLAN_F_PROXY;
3400 }
3401
3402 if (data[IFLA_VXLAN_RSC]) {
3403 if (changelink)
3404 return -EOPNOTSUPP;
3405 if (nla_get_u8(data[IFLA_VXLAN_RSC]))
3406 conf->flags |= VXLAN_F_RSC;
3407 }
3408
3409 if (data[IFLA_VXLAN_L2MISS]) {
3410 if (changelink)
3411 return -EOPNOTSUPP;
3412 if (nla_get_u8(data[IFLA_VXLAN_L2MISS]))
3413 conf->flags |= VXLAN_F_L2MISS;
3414 }
3415
3416 if (data[IFLA_VXLAN_L3MISS]) {
3417 if (changelink)
3418 return -EOPNOTSUPP;
3419 if (nla_get_u8(data[IFLA_VXLAN_L3MISS]))
3420 conf->flags |= VXLAN_F_L3MISS;
3421 }
3422
3423 if (data[IFLA_VXLAN_LIMIT]) {
3424 if (changelink)
3425 return -EOPNOTSUPP;
3426 conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
3427 }
3428
3429 if (data[IFLA_VXLAN_COLLECT_METADATA]) {
3430 if (changelink)
3431 return -EOPNOTSUPP;
3432 if (nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
3433 conf->flags |= VXLAN_F_COLLECT_METADATA;
3434 }
3435
3436 if (data[IFLA_VXLAN_PORT_RANGE]) {
3437 if (!changelink) {
3438 const struct ifla_vxlan_port_range *p
3439 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
3440 conf->port_min = ntohs(p->low);
3441 conf->port_max = ntohs(p->high);
3442 } else {
3443 return -EOPNOTSUPP;
3444 }
3445 }
3446
3447 if (data[IFLA_VXLAN_PORT]) {
3448 if (changelink)
3449 return -EOPNOTSUPP;
3450 conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
3451 }
3452
3453 if (data[IFLA_VXLAN_UDP_CSUM]) {
3454 if (changelink)
3455 return -EOPNOTSUPP;
3456 if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
3457 conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
3458 }
3459
3460 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) {
3461 if (changelink)
3462 return -EOPNOTSUPP;
3463 if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
3464 conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
3465 }
3466
3467 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) {
3468 if (changelink)
3469 return -EOPNOTSUPP;
3470 if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
3471 conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
3472 }
3473
3474 if (data[IFLA_VXLAN_REMCSUM_TX]) {
3475 if (changelink)
3476 return -EOPNOTSUPP;
3477 if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
3478 conf->flags |= VXLAN_F_REMCSUM_TX;
3479 }
3480
3481 if (data[IFLA_VXLAN_REMCSUM_RX]) {
3482 if (changelink)
3483 return -EOPNOTSUPP;
3484 if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
3485 conf->flags |= VXLAN_F_REMCSUM_RX;
3486 }
3487
3488 if (data[IFLA_VXLAN_GBP]) {
3489 if (changelink)
3490 return -EOPNOTSUPP;
3491 conf->flags |= VXLAN_F_GBP;
3492 }
3493
3494 if (data[IFLA_VXLAN_GPE]) {
3495 if (changelink)
3496 return -EOPNOTSUPP;
3497 conf->flags |= VXLAN_F_GPE;
3498 }
3499
3500 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) {
3501 if (changelink)
3502 return -EOPNOTSUPP;
3503 conf->flags |= VXLAN_F_REMCSUM_NOPARTIAL;
3504 }
3505
3506 if (tb[IFLA_MTU]) {
3507 if (changelink)
3508 return -EOPNOTSUPP;
3509 conf->mtu = nla_get_u32(tb[IFLA_MTU]);
3510 }
3511
3512 return 0;
3513}
3514
3515static int vxlan_newlink(struct net *src_net, struct net_device *dev,
Matthias Schiffer7a3f4a12017-06-25 23:55:59 +02003516 struct nlattr *tb[], struct nlattr *data[],
3517 struct netlink_ext_ack *extack)
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003518{
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003519 struct vxlan_config conf;
3520 int err;
3521
3522 err = vxlan_nl2conf(tb, data, dev, &conf, false);
3523 if (err)
3524 return err;
3525
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003526 return __vxlan_dev_create(src_net, dev, &conf, extack);
stephen hemmingerd3428942012-10-01 12:32:35 +00003527}
3528
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003529static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
Matthias Schifferad744b22017-06-25 23:56:00 +02003530 struct nlattr *data[],
3531 struct netlink_ext_ack *extack)
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003532{
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003533 struct vxlan_dev *vxlan = netdev_priv(dev);
3534 struct vxlan_rdst *dst = &vxlan->default_dst;
3535 struct vxlan_rdst old_dst;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003536 struct vxlan_config conf;
Roopa Prabhu0241b832018-07-04 16:46:32 -07003537 struct vxlan_fdb *f = NULL;
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003538 int err;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003539
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003540 err = vxlan_nl2conf(tb, data,
3541 dev, &conf, true);
3542 if (err)
3543 return err;
Jesse Grosse277de52015-10-16 16:36:00 -07003544
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003545 memcpy(&old_dst, dst, sizeof(struct vxlan_rdst));
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003546
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003547 err = vxlan_dev_configure(vxlan->net, dev, &conf, true, extack);
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003548 if (err)
3549 return err;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003550
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003551 /* handle default dst entry */
3552 if (!vxlan_addr_equal(&dst->remote_ip, &old_dst.remote_ip)) {
3553 spin_lock_bh(&vxlan->hash_lock);
3554 if (!vxlan_addr_any(&old_dst.remote_ip))
3555 __vxlan_fdb_delete(vxlan, all_zeros_mac,
3556 old_dst.remote_ip,
3557 vxlan->cfg.dst_port,
3558 old_dst.remote_vni,
3559 old_dst.remote_vni,
3560 old_dst.remote_ifindex, 0);
3561
3562 if (!vxlan_addr_any(&dst->remote_ip)) {
Roopa Prabhu0241b832018-07-04 16:46:32 -07003563 err = vxlan_fdb_create(vxlan, all_zeros_mac,
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003564 &dst->remote_ip,
3565 NUD_REACHABLE | NUD_PERMANENT,
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003566 vxlan->cfg.dst_port,
3567 dst->remote_vni,
3568 dst->remote_vni,
3569 dst->remote_ifindex,
Roopa Prabhu0241b832018-07-04 16:46:32 -07003570 NTF_SELF, &f);
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003571 if (err) {
3572 spin_unlock_bh(&vxlan->hash_lock);
3573 return err;
3574 }
Roopa Prabhu0241b832018-07-04 16:46:32 -07003575 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_NEWNEIGH);
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003576 }
3577 spin_unlock_bh(&vxlan->hash_lock);
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003578 }
3579
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003580 return 0;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003581}
3582
stephen hemmingerd3428942012-10-01 12:32:35 +00003583static void vxlan_dellink(struct net_device *dev, struct list_head *head)
3584{
3585 struct vxlan_dev *vxlan = netdev_priv(dev);
3586
Roopa Prabhu8b3f9332017-01-23 20:44:32 -08003587 vxlan_flush(vxlan, true);
3588
Tom Herbert58ce31c2015-08-19 17:07:33 -07003589 gro_cells_destroy(&vxlan->gro_cells);
stephen hemminger553675f2013-05-16 11:35:20 +00003590 list_del(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00003591 unregister_netdevice_queue(dev, head);
3592}
3593
3594static size_t vxlan_get_size(const struct net_device *dev)
3595{
3596
3597 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
Cong Wange4c7ed42013-08-31 13:44:33 +08003598 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00003599 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
Cong Wange4c7ed42013-08-31 13:44:33 +08003600 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00003601 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
Hangbin Liu8fd78062018-09-26 10:35:42 +08003602 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL_INHERIT */
stephen hemmingerd3428942012-10-01 12:32:35 +00003603 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01003604 nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */
stephen hemmingerd3428942012-10-01 12:32:35 +00003605 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
David Stevense4f67ad2012-11-20 02:50:14 +00003606 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
3607 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
3608 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
3609 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07003610 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
stephen hemmingerd3428942012-10-01 12:32:35 +00003611 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
3612 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
stephen hemminger05f47d62012-10-09 20:35:50 +00003613 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
Tom Herbert359a0ea2014-06-04 17:20:29 -07003614 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
3615 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
3616 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3617 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
Tom Herbertdfd86452015-01-12 17:00:38 -08003618 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
3619 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
stephen hemmingerd3428942012-10-01 12:32:35 +00003620 0;
3621}
3622
3623static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
3624{
3625 const struct vxlan_dev *vxlan = netdev_priv(dev);
Atzm Watanabec7995c42013-04-16 02:50:52 +00003626 const struct vxlan_rdst *dst = &vxlan->default_dst;
stephen hemminger05f47d62012-10-09 20:35:50 +00003627 struct ifla_vxlan_port_range ports = {
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003628 .low = htons(vxlan->cfg.port_min),
3629 .high = htons(vxlan->cfg.port_max),
stephen hemminger05f47d62012-10-09 20:35:50 +00003630 };
stephen hemmingerd3428942012-10-01 12:32:35 +00003631
Jiri Benc54bfd872016-02-16 21:58:58 +01003632 if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni)))
stephen hemmingerd3428942012-10-01 12:32:35 +00003633 goto nla_put_failure;
3634
Cong Wange4c7ed42013-08-31 13:44:33 +08003635 if (!vxlan_addr_any(&dst->remote_ip)) {
3636 if (dst->remote_ip.sa.sa_family == AF_INET) {
Jiri Benc930345e2015-03-29 16:59:25 +02003637 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
3638 dst->remote_ip.sin.sin_addr.s_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003639 goto nla_put_failure;
3640#if IS_ENABLED(CONFIG_IPV6)
3641 } else {
Jiri Benc930345e2015-03-29 16:59:25 +02003642 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
3643 &dst->remote_ip.sin6.sin6_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003644 goto nla_put_failure;
3645#endif
3646 }
3647 }
stephen hemmingerd3428942012-10-01 12:32:35 +00003648
Atzm Watanabec7995c42013-04-16 02:50:52 +00003649 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
stephen hemmingerd3428942012-10-01 12:32:35 +00003650 goto nla_put_failure;
3651
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003652 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
3653 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
Jiri Benc930345e2015-03-29 16:59:25 +02003654 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003655 vxlan->cfg.saddr.sin.sin_addr.s_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003656 goto nla_put_failure;
3657#if IS_ENABLED(CONFIG_IPV6)
3658 } else {
Jiri Benc930345e2015-03-29 16:59:25 +02003659 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003660 &vxlan->cfg.saddr.sin6.sin6_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003661 goto nla_put_failure;
3662#endif
3663 }
3664 }
stephen hemmingerd3428942012-10-01 12:32:35 +00003665
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003666 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
Hangbin Liu8fd78062018-09-26 10:35:42 +08003667 nla_put_u8(skb, IFLA_VXLAN_TTL_INHERIT,
3668 !!(vxlan->cfg.flags & VXLAN_F_TTL_INHERIT)) ||
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003669 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01003670 nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) ||
David Stevense4f67ad2012-11-20 02:50:14 +00003671 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003672 !!(vxlan->cfg.flags & VXLAN_F_LEARN)) ||
David Stevense4f67ad2012-11-20 02:50:14 +00003673 nla_put_u8(skb, IFLA_VXLAN_PROXY,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003674 !!(vxlan->cfg.flags & VXLAN_F_PROXY)) ||
3675 nla_put_u8(skb, IFLA_VXLAN_RSC,
3676 !!(vxlan->cfg.flags & VXLAN_F_RSC)) ||
David Stevense4f67ad2012-11-20 02:50:14 +00003677 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003678 !!(vxlan->cfg.flags & VXLAN_F_L2MISS)) ||
David Stevense4f67ad2012-11-20 02:50:14 +00003679 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003680 !!(vxlan->cfg.flags & VXLAN_F_L3MISS)) ||
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07003681 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003682 !!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)) ||
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003683 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
3684 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
3685 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07003686 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003687 !(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM_TX)) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07003688 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003689 !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07003690 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003691 !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
Tom Herbertdfd86452015-01-12 17:00:38 -08003692 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003693 !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_TX)) ||
Tom Herbertdfd86452015-01-12 17:00:38 -08003694 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003695 !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_RX)))
stephen hemmingerd3428942012-10-01 12:32:35 +00003696 goto nla_put_failure;
3697
stephen hemminger05f47d62012-10-09 20:35:50 +00003698 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
3699 goto nla_put_failure;
3700
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003701 if (vxlan->cfg.flags & VXLAN_F_GBP &&
Thomas Graf35114942015-01-15 03:53:55 +01003702 nla_put_flag(skb, IFLA_VXLAN_GBP))
3703 goto nla_put_failure;
3704
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003705 if (vxlan->cfg.flags & VXLAN_F_GPE &&
Jiri Bence1e53142016-04-05 14:47:13 +02003706 nla_put_flag(skb, IFLA_VXLAN_GPE))
3707 goto nla_put_failure;
3708
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003709 if (vxlan->cfg.flags & VXLAN_F_REMCSUM_NOPARTIAL &&
Tom Herbert0ace2ca2015-02-10 16:30:32 -08003710 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3711 goto nla_put_failure;
3712
stephen hemmingerd3428942012-10-01 12:32:35 +00003713 return 0;
3714
3715nla_put_failure:
3716 return -EMSGSIZE;
3717}
3718
Nicolas Dichtel1728d4f2015-01-15 15:11:17 +01003719static struct net *vxlan_get_link_net(const struct net_device *dev)
3720{
3721 struct vxlan_dev *vxlan = netdev_priv(dev);
3722
3723 return vxlan->net;
3724}
3725
stephen hemmingerd3428942012-10-01 12:32:35 +00003726static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3727 .kind = "vxlan",
3728 .maxtype = IFLA_VXLAN_MAX,
3729 .policy = vxlan_policy,
3730 .priv_size = sizeof(struct vxlan_dev),
3731 .setup = vxlan_setup,
3732 .validate = vxlan_validate,
3733 .newlink = vxlan_newlink,
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003734 .changelink = vxlan_changelink,
stephen hemmingerd3428942012-10-01 12:32:35 +00003735 .dellink = vxlan_dellink,
3736 .get_size = vxlan_get_size,
3737 .fill_info = vxlan_fill_info,
Nicolas Dichtel1728d4f2015-01-15 15:11:17 +01003738 .get_link_net = vxlan_get_link_net,
stephen hemmingerd3428942012-10-01 12:32:35 +00003739};
3740
Nicolas Dichtelcf5da332016-06-13 10:31:05 +02003741struct net_device *vxlan_dev_create(struct net *net, const char *name,
3742 u8 name_assign_type,
3743 struct vxlan_config *conf)
3744{
3745 struct nlattr *tb[IFLA_MAX + 1];
3746 struct net_device *dev;
3747 int err;
3748
3749 memset(&tb, 0, sizeof(tb));
3750
3751 dev = rtnl_create_link(net, name, name_assign_type,
3752 &vxlan_link_ops, tb);
3753 if (IS_ERR(dev))
3754 return dev;
3755
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003756 err = __vxlan_dev_create(net, dev, conf, NULL);
Nicolas Dichtelcf5da332016-06-13 10:31:05 +02003757 if (err < 0) {
3758 free_netdev(dev);
3759 return ERR_PTR(err);
3760 }
3761
3762 err = rtnl_configure_link(dev, NULL);
3763 if (err < 0) {
3764 LIST_HEAD(list_kill);
3765
3766 vxlan_dellink(dev, &list_kill);
3767 unregister_netdevice_many(&list_kill);
3768 return ERR_PTR(err);
3769 }
3770
3771 return dev;
3772}
3773EXPORT_SYMBOL_GPL(vxlan_dev_create);
3774
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003775static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3776 struct net_device *dev)
3777{
3778 struct vxlan_dev *vxlan, *next;
3779 LIST_HEAD(list_kill);
3780
3781 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3782 struct vxlan_rdst *dst = &vxlan->default_dst;
3783
3784 /* In case we created vxlan device with carrier
3785 * and we loose the carrier due to module unload
3786 * we also need to remove vxlan device. In other
3787 * cases, it's not necessary and remote_ifindex
3788 * is 0 here, so no matches.
3789 */
3790 if (dst->remote_ifindex == dev->ifindex)
3791 vxlan_dellink(vxlan->dev, &list_kill);
3792 }
3793
3794 unregister_netdevice_many(&list_kill);
3795}
3796
Hannes Frederic Sowab7aade12016-04-18 21:19:47 +02003797static int vxlan_netdevice_event(struct notifier_block *unused,
3798 unsigned long event, void *ptr)
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003799{
3800 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Daniel Borkmann783c1462014-01-22 21:07:53 +01003801 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003802
Sabrina Dubroca04584952017-07-21 12:49:33 +02003803 if (event == NETDEV_UNREGISTER) {
3804 vxlan_offload_rx_ports(dev, false);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003805 vxlan_handle_lowerdev_unregister(vn, dev);
Sabrina Dubroca04584952017-07-21 12:49:33 +02003806 } else if (event == NETDEV_REGISTER) {
3807 vxlan_offload_rx_ports(dev, true);
3808 } else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO ||
3809 event == NETDEV_UDP_TUNNEL_DROP_INFO) {
Sabrina Dubroca2d2b13f2017-07-21 12:49:32 +02003810 vxlan_offload_rx_ports(dev, event == NETDEV_UDP_TUNNEL_PUSH_INFO);
Sabrina Dubroca04584952017-07-21 12:49:33 +02003811 }
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003812
3813 return NOTIFY_DONE;
3814}
3815
3816static struct notifier_block vxlan_notifier_block __read_mostly = {
Hannes Frederic Sowab7aade12016-04-18 21:19:47 +02003817 .notifier_call = vxlan_netdevice_event,
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003818};
3819
Petr Machata0efe1172018-10-17 08:53:26 +00003820static void
3821vxlan_fdb_offloaded_set(struct net_device *dev,
3822 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
3823{
3824 struct vxlan_dev *vxlan = netdev_priv(dev);
3825 struct vxlan_rdst *rdst;
3826 struct vxlan_fdb *f;
3827
3828 spin_lock_bh(&vxlan->hash_lock);
3829
3830 f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni);
3831 if (!f)
3832 goto out;
3833
3834 rdst = vxlan_fdb_find_rdst(f, &fdb_info->remote_ip,
3835 fdb_info->remote_port,
3836 fdb_info->remote_vni,
3837 fdb_info->remote_ifindex);
3838 if (!rdst)
3839 goto out;
3840
3841 rdst->offloaded = fdb_info->offloaded;
3842
3843out:
3844 spin_unlock_bh(&vxlan->hash_lock);
3845}
3846
3847static int vxlan_switchdev_event(struct notifier_block *unused,
3848 unsigned long event, void *ptr)
3849{
3850 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3851
3852 switch (event) {
3853 case SWITCHDEV_VXLAN_FDB_OFFLOADED:
3854 vxlan_fdb_offloaded_set(dev, ptr);
3855 break;
3856 }
3857
3858 return 0;
3859}
3860
3861static struct notifier_block vxlan_switchdev_notifier_block __read_mostly = {
3862 .notifier_call = vxlan_switchdev_event,
3863};
3864
stephen hemmingerd3428942012-10-01 12:32:35 +00003865static __net_init int vxlan_init_net(struct net *net)
3866{
3867 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Cong Wang31fec5a2013-05-27 22:35:52 +00003868 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00003869
stephen hemminger553675f2013-05-16 11:35:20 +00003870 INIT_LIST_HEAD(&vn->vxlan_list);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07003871 spin_lock_init(&vn->sock_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00003872
stephen hemminger553675f2013-05-16 11:35:20 +00003873 for (h = 0; h < PORT_HASH_SIZE; ++h)
3874 INIT_HLIST_HEAD(&vn->sock_list[h]);
stephen hemmingerd3428942012-10-01 12:32:35 +00003875
3876 return 0;
3877}
3878
Haishuang Yan57b61122017-12-16 17:54:49 +08003879static void vxlan_destroy_tunnels(struct net *net, struct list_head *head)
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003880{
3881 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3882 struct vxlan_dev *vxlan, *next;
3883 struct net_device *dev, *aux;
Vasily Averin0e4ec5a2017-11-12 22:28:10 +03003884 unsigned int h;
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003885
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003886 for_each_netdev_safe(net, dev, aux)
3887 if (dev->rtnl_link_ops == &vxlan_link_ops)
Haishuang Yan57b61122017-12-16 17:54:49 +08003888 unregister_netdevice_queue(dev, head);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003889
3890 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3891 /* If vxlan->dev is in the same netns, it has already been added
3892 * to the list by the previous loop.
3893 */
Tom Herbert58ce31c2015-08-19 17:07:33 -07003894 if (!net_eq(dev_net(vxlan->dev), net)) {
3895 gro_cells_destroy(&vxlan->gro_cells);
Haishuang Yan57b61122017-12-16 17:54:49 +08003896 unregister_netdevice_queue(vxlan->dev, head);
Tom Herbert58ce31c2015-08-19 17:07:33 -07003897 }
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003898 }
3899
Vasily Averin0e4ec5a2017-11-12 22:28:10 +03003900 for (h = 0; h < PORT_HASH_SIZE; ++h)
3901 WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h]));
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003902}
3903
Haishuang Yan57b61122017-12-16 17:54:49 +08003904static void __net_exit vxlan_exit_batch_net(struct list_head *net_list)
3905{
3906 struct net *net;
3907 LIST_HEAD(list);
3908
3909 rtnl_lock();
3910 list_for_each_entry(net, net_list, exit_list)
3911 vxlan_destroy_tunnels(net, &list);
3912
3913 unregister_netdevice_many(&list);
3914 rtnl_unlock();
3915}
3916
stephen hemmingerd3428942012-10-01 12:32:35 +00003917static struct pernet_operations vxlan_net_ops = {
3918 .init = vxlan_init_net,
Haishuang Yan57b61122017-12-16 17:54:49 +08003919 .exit_batch = vxlan_exit_batch_net,
stephen hemmingerd3428942012-10-01 12:32:35 +00003920 .id = &vxlan_net_id,
3921 .size = sizeof(struct vxlan_net),
3922};
3923
3924static int __init vxlan_init_module(void)
3925{
3926 int rc;
3927
3928 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3929
Daniel Borkmann783c1462014-01-22 21:07:53 +01003930 rc = register_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00003931 if (rc)
3932 goto out1;
3933
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003934 rc = register_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00003935 if (rc)
3936 goto out2;
3937
Petr Machata0efe1172018-10-17 08:53:26 +00003938 rc = register_switchdev_notifier(&vxlan_switchdev_notifier_block);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003939 if (rc)
3940 goto out3;
stephen hemmingerd3428942012-10-01 12:32:35 +00003941
Petr Machata0efe1172018-10-17 08:53:26 +00003942 rc = rtnl_link_register(&vxlan_link_ops);
3943 if (rc)
3944 goto out4;
3945
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003946 return 0;
Petr Machata0efe1172018-10-17 08:53:26 +00003947out4:
3948 unregister_switchdev_notifier(&vxlan_switchdev_notifier_block);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003949out3:
3950 unregister_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00003951out2:
Daniel Borkmann783c1462014-01-22 21:07:53 +01003952 unregister_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00003953out1:
3954 return rc;
3955}
Cong Wang7332a132013-05-27 22:35:53 +00003956late_initcall(vxlan_init_module);
stephen hemmingerd3428942012-10-01 12:32:35 +00003957
3958static void __exit vxlan_cleanup_module(void)
3959{
Stephen Hemmingerb7153982013-06-17 14:16:09 -07003960 rtnl_link_unregister(&vxlan_link_ops);
Petr Machata0efe1172018-10-17 08:53:26 +00003961 unregister_switchdev_notifier(&vxlan_switchdev_notifier_block);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003962 unregister_netdevice_notifier(&vxlan_notifier_block);
Daniel Borkmann783c1462014-01-22 21:07:53 +01003963 unregister_pernet_subsys(&vxlan_net_ops);
3964 /* rcu_barrier() is called by netns */
stephen hemmingerd3428942012-10-01 12:32:35 +00003965}
3966module_exit(vxlan_cleanup_module);
3967
3968MODULE_LICENSE("GPL");
3969MODULE_VERSION(VXLAN_VERSION);
stephen hemminger3b8df3c2013-04-27 11:31:52 +00003970MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
Jesse Brandeburgead51392014-01-17 11:00:33 -08003971MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
stephen hemmingerd3428942012-10-01 12:32:35 +00003972MODULE_ALIAS_RTNL_LINK("vxlan");