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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,
Petr Machata0e6160f2018-11-21 08:02:35 +0000387 struct vxlan_rdst *rd, int type, bool swdev_notify)
Petr Machata9a997352018-10-17 08:53:22 +0000388{
Petr Machata0e6160f2018-11-21 08:02:35 +0000389 if (swdev_notify) {
390 switch (type) {
391 case RTM_NEWNEIGH:
392 vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd,
393 true);
394 break;
395 case RTM_DELNEIGH:
396 vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd,
397 false);
398 break;
399 }
Petr Machata9a997352018-10-17 08:53:22 +0000400 }
401
402 __vxlan_fdb_notify(vxlan, fdb, rd, type);
403}
404
Cong Wange4c7ed42013-08-31 13:44:33 +0800405static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
David Stevense4f67ad2012-11-20 02:50:14 +0000406{
407 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700408 struct vxlan_fdb f = {
409 .state = NUD_STALE,
410 };
411 struct vxlan_rdst remote = {
Cong Wange4c7ed42013-08-31 13:44:33 +0800412 .remote_ip = *ipa, /* goes to NDA_DST */
Jiri Benc54bfd872016-02-16 21:58:58 +0100413 .remote_vni = cpu_to_be32(VXLAN_N_VID),
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700414 };
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700415
Petr Machata0e6160f2018-11-21 08:02:35 +0000416 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true);
David Stevense4f67ad2012-11-20 02:50:14 +0000417}
418
419static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
420{
Stephen Hemmingerbb3fd682013-06-17 14:16:40 -0700421 struct vxlan_fdb f = {
422 .state = NUD_STALE,
423 };
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200424 struct vxlan_rdst remote = { };
David Stevense4f67ad2012-11-20 02:50:14 +0000425
David Stevense4f67ad2012-11-20 02:50:14 +0000426 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
427
Petr Machata0e6160f2018-11-21 08:02:35 +0000428 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true);
David Stevense4f67ad2012-11-20 02:50:14 +0000429}
430
stephen hemmingerd3428942012-10-01 12:32:35 +0000431/* Hash Ethernet address */
432static u32 eth_hash(const unsigned char *addr)
433{
434 u64 value = get_unaligned((u64 *)addr);
435
436 /* only want 6 bytes */
437#ifdef __BIG_ENDIAN
stephen hemmingerd3428942012-10-01 12:32:35 +0000438 value >>= 16;
stephen hemminger321fb992012-10-09 20:35:47 +0000439#else
440 value <<= 16;
stephen hemmingerd3428942012-10-01 12:32:35 +0000441#endif
442 return hash_64(value, FDB_HASH_BITS);
443}
444
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800445static u32 eth_vni_hash(const unsigned char *addr, __be32 vni)
446{
447 /* use 1 byte of OUI and 3 bytes of NIC */
448 u32 key = get_unaligned((u32 *)(addr + 2));
449
450 return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1);
451}
452
stephen hemmingerd3428942012-10-01 12:32:35 +0000453/* Hash chain to use given mac address */
454static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800455 const u8 *mac, __be32 vni)
stephen hemmingerd3428942012-10-01 12:32:35 +0000456{
Matthias Schifferdc5321d2017-06-19 10:03:56 +0200457 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800458 return &vxlan->fdb_head[eth_vni_hash(mac, vni)];
459 else
460 return &vxlan->fdb_head[eth_hash(mac)];
stephen hemmingerd3428942012-10-01 12:32:35 +0000461}
462
463/* Look up Ethernet address in forwarding table */
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000464static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800465 const u8 *mac, __be32 vni)
stephen hemmingerd3428942012-10-01 12:32:35 +0000466{
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800467 struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni);
stephen hemmingerd3428942012-10-01 12:32:35 +0000468 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +0000469
Sasha Levinb67bfe02013-02-27 17:06:00 -0800470 hlist_for_each_entry_rcu(f, head, hlist) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800471 if (ether_addr_equal(mac, f->eth_addr)) {
Matthias Schifferdc5321d2017-06-19 10:03:56 +0200472 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800473 if (vni == f->vni)
474 return f;
475 } else {
476 return f;
477 }
478 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000479 }
480
481 return NULL;
482}
483
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000484static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800485 const u8 *mac, __be32 vni)
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000486{
487 struct vxlan_fdb *f;
488
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800489 f = __vxlan_find_mac(vxlan, mac, vni);
Li RongQing016f3d12018-08-29 11:52:10 +0800490 if (f && f->used != jiffies)
Sridhar Samudrala014be2c2013-05-17 06:39:07 +0000491 f->used = jiffies;
492
493 return f;
494}
495
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300496/* caller should hold vxlan->hash_lock */
497static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
Cong Wange4c7ed42013-08-31 13:44:33 +0800498 union vxlan_addr *ip, __be16 port,
Jiri Benc54bfd872016-02-16 21:58:58 +0100499 __be32 vni, __u32 ifindex)
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300500{
501 struct vxlan_rdst *rd;
502
503 list_for_each_entry(rd, &f->remotes, list) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800504 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300505 rd->remote_port == port &&
506 rd->remote_vni == vni &&
507 rd->remote_ifindex == ifindex)
508 return rd;
509 }
510
511 return NULL;
512}
513
Petr Machata1941f1d2018-10-17 08:53:24 +0000514int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
515 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
516{
517 struct vxlan_dev *vxlan = netdev_priv(dev);
518 u8 eth_addr[ETH_ALEN + 2] = { 0 };
519 struct vxlan_rdst *rdst;
520 struct vxlan_fdb *f;
521 int rc = 0;
522
523 if (is_multicast_ether_addr(mac) ||
524 is_zero_ether_addr(mac))
525 return -EINVAL;
526
527 ether_addr_copy(eth_addr, mac);
528
529 rcu_read_lock();
530
531 f = __vxlan_find_mac(vxlan, eth_addr, vni);
532 if (!f) {
533 rc = -ENOENT;
534 goto out;
535 }
536
537 rdst = first_remote_rcu(f);
538
539 memset(fdb_info, 0, sizeof(*fdb_info));
540 fdb_info->info.dev = dev;
541 fdb_info->remote_ip = rdst->remote_ip;
542 fdb_info->remote_port = rdst->remote_port;
543 fdb_info->remote_vni = rdst->remote_vni;
544 fdb_info->remote_ifindex = rdst->remote_ifindex;
545 fdb_info->vni = vni;
Petr Machata0efe1172018-10-17 08:53:26 +0000546 fdb_info->offloaded = rdst->offloaded;
Petr Machata1941f1d2018-10-17 08:53:24 +0000547 ether_addr_copy(fdb_info->eth_addr, mac);
548
549out:
550 rcu_read_unlock();
551 return rc;
552}
553EXPORT_SYMBOL_GPL(vxlan_fdb_find_uc);
554
Thomas Richter906dc182013-07-19 17:20:07 +0200555/* Replace destination of unicast mac */
556static int vxlan_fdb_replace(struct vxlan_fdb *f,
Jiri Benc54bfd872016-02-16 21:58:58 +0100557 union vxlan_addr *ip, __be16 port, __be32 vni,
558 __u32 ifindex)
Thomas Richter906dc182013-07-19 17:20:07 +0200559{
560 struct vxlan_rdst *rd;
561
562 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
563 if (rd)
564 return 0;
565
566 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
567 if (!rd)
568 return 0;
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100569
570 dst_cache_reset(&rd->dst_cache);
Cong Wange4c7ed42013-08-31 13:44:33 +0800571 rd->remote_ip = *ip;
Thomas Richter906dc182013-07-19 17:20:07 +0200572 rd->remote_port = port;
573 rd->remote_vni = vni;
574 rd->remote_ifindex = ifindex;
575 return 1;
576}
577
David Stevens66817122013-03-15 04:35:51 +0000578/* Add/update destinations for multicast */
579static int vxlan_fdb_append(struct vxlan_fdb *f,
Jiri Benc54bfd872016-02-16 21:58:58 +0100580 union vxlan_addr *ip, __be16 port, __be32 vni,
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200581 __u32 ifindex, struct vxlan_rdst **rdp)
David Stevens66817122013-03-15 04:35:51 +0000582{
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700583 struct vxlan_rdst *rd;
David Stevens66817122013-03-15 04:35:51 +0000584
Mike Rapoporta5e7c102013-06-25 16:01:52 +0300585 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
586 if (rd)
587 return 0;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700588
David Stevens66817122013-03-15 04:35:51 +0000589 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
590 if (rd == NULL)
591 return -ENOBUFS;
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100592
593 if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) {
594 kfree(rd);
595 return -ENOBUFS;
596 }
597
Cong Wange4c7ed42013-08-31 13:44:33 +0800598 rd->remote_ip = *ip;
David Stevens66817122013-03-15 04:35:51 +0000599 rd->remote_port = port;
Petr Machata0efe1172018-10-17 08:53:26 +0000600 rd->offloaded = false;
David Stevens66817122013-03-15 04:35:51 +0000601 rd->remote_vni = vni;
602 rd->remote_ifindex = ifindex;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700603
604 list_add_tail_rcu(&rd->list, &f->remotes);
605
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200606 *rdp = rd;
David Stevens66817122013-03-15 04:35:51 +0000607 return 1;
608}
609
Tom Herbertdfd86452015-01-12 17:00:38 -0800610static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
611 unsigned int off,
612 struct vxlanhdr *vh, size_t hdrlen,
Jiri Benc54bfd872016-02-16 21:58:58 +0100613 __be32 vni_field,
614 struct gro_remcsum *grc,
Tom Herbert0ace2ca2015-02-10 16:30:32 -0800615 bool nopartial)
Tom Herbertdfd86452015-01-12 17:00:38 -0800616{
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700617 size_t start, offset;
Tom Herbertdfd86452015-01-12 17:00:38 -0800618
619 if (skb->remcsum_offload)
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700620 return vh;
Tom Herbertdfd86452015-01-12 17:00:38 -0800621
622 if (!NAPI_GRO_CB(skb)->csum_valid)
623 return NULL;
624
Jiri Benc54bfd872016-02-16 21:58:58 +0100625 start = vxlan_rco_start(vni_field);
626 offset = start + vxlan_rco_offset(vni_field);
Tom Herbertdfd86452015-01-12 17:00:38 -0800627
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700628 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
629 start, offset, grc, nopartial);
Tom Herbertdfd86452015-01-12 17:00:38 -0800630
631 skb->remcsum_offload = 1;
632
633 return vh;
634}
635
David Millerd4546c22018-06-24 14:13:49 +0900636static struct sk_buff *vxlan_gro_receive(struct sock *sk,
637 struct list_head *head,
638 struct sk_buff *skb)
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200639{
David Millerd4546c22018-06-24 14:13:49 +0900640 struct sk_buff *pp = NULL;
641 struct sk_buff *p;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200642 struct vxlanhdr *vh, *vh2;
Jesse Gross9b174d82014-12-30 19:10:15 -0800643 unsigned int hlen, off_vx;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200644 int flush = 1;
Tom Herbert5602c482016-04-05 08:22:53 -0700645 struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk);
Jiri Benc54bfd872016-02-16 21:58:58 +0100646 __be32 flags;
Tom Herbert26c4f7d2015-02-10 16:30:27 -0800647 struct gro_remcsum grc;
648
649 skb_gro_remcsum_init(&grc);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200650
651 off_vx = skb_gro_offset(skb);
652 hlen = off_vx + sizeof(*vh);
653 vh = skb_gro_header_fast(skb, off_vx);
654 if (skb_gro_header_hard(skb, hlen)) {
655 vh = skb_gro_header_slow(skb, hlen, off_vx);
656 if (unlikely(!vh))
657 goto out;
658 }
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200659
Tom Herbertdfd86452015-01-12 17:00:38 -0800660 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
661
Jiri Benc54bfd872016-02-16 21:58:58 +0100662 flags = vh->vx_flags;
Tom Herbertdfd86452015-01-12 17:00:38 -0800663
664 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
665 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
Jiri Benc54bfd872016-02-16 21:58:58 +0100666 vh->vx_vni, &grc,
Tom Herbert0ace2ca2015-02-10 16:30:32 -0800667 !!(vs->flags &
668 VXLAN_F_REMCSUM_NOPARTIAL));
Tom Herbertdfd86452015-01-12 17:00:38 -0800669
670 if (!vh)
671 goto out;
672 }
673
Tom Herbertb7fe10e2015-08-19 17:07:32 -0700674 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
675
David Millerd4546c22018-06-24 14:13:49 +0900676 list_for_each_entry(p, head, list) {
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200677 if (!NAPI_GRO_CB(p)->same_flow)
678 continue;
679
680 vh2 = (struct vxlanhdr *)(p->data + off_vx);
Thomas Graf35114942015-01-15 03:53:55 +0100681 if (vh->vx_flags != vh2->vx_flags ||
682 vh->vx_vni != vh2->vx_vni) {
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200683 NAPI_GRO_CB(p)->same_flow = 0;
684 continue;
685 }
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200686 }
687
Sabrina Dubrocafcd91dd2016-10-20 15:58:02 +0200688 pp = call_gro_receive(eth_gro_receive, head, skb);
Alexander Duyckc194cf92016-03-09 09:24:23 -0800689 flush = 0;
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200690
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200691out:
Sabrina Dubroca603d4cf2018-06-30 17:38:55 +0200692 skb_gro_flush_final_remcsum(skb, pp, flush, &grc);
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200693
694 return pp;
695}
696
Tom Herbert5602c482016-04-05 08:22:53 -0700697static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff)
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200698{
Jarno Rajahalme229740c2016-05-03 16:10:21 -0700699 /* Sets 'skb->inner_mac_header' since we are always called with
700 * 'skb->encapsulation' set.
701 */
Jesse Gross9b174d82014-12-30 19:10:15 -0800702 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
Or Gerlitzdc01e7d2014-01-20 13:59:21 +0200703}
704
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700705static struct vxlan_fdb *vxlan_fdb_alloc(struct vxlan_dev *vxlan,
706 const u8 *mac, __u16 state,
707 __be32 src_vni, __u8 ndm_flags)
708{
709 struct vxlan_fdb *f;
710
711 f = kmalloc(sizeof(*f), GFP_ATOMIC);
712 if (!f)
713 return NULL;
714 f->state = state;
715 f->flags = ndm_flags;
716 f->updated = f->used = jiffies;
717 f->vni = src_vni;
718 INIT_LIST_HEAD(&f->remotes);
719 memcpy(f->eth_addr, mac, ETH_ALEN);
720
721 return f;
722}
723
stephen hemmingerd3428942012-10-01 12:32:35 +0000724static int vxlan_fdb_create(struct vxlan_dev *vxlan,
Cong Wange4c7ed42013-08-31 13:44:33 +0800725 const u8 *mac, union vxlan_addr *ip,
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700726 __u16 state, __be16 port, __be32 src_vni,
727 __be32 vni, __u32 ifindex, __u8 ndm_flags,
728 struct vxlan_fdb **fdb)
729{
730 struct vxlan_rdst *rd = NULL;
731 struct vxlan_fdb *f;
732 int rc;
733
734 if (vxlan->cfg.addrmax &&
735 vxlan->addrcnt >= vxlan->cfg.addrmax)
736 return -ENOSPC;
737
738 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
739 f = vxlan_fdb_alloc(vxlan, mac, state, src_vni, ndm_flags);
740 if (!f)
741 return -ENOMEM;
742
743 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
744 if (rc < 0) {
745 kfree(f);
746 return rc;
747 }
748
749 ++vxlan->addrcnt;
750 hlist_add_head_rcu(&f->hlist,
751 vxlan_fdb_head(vxlan, mac, src_vni));
752
753 *fdb = f;
754
755 return 0;
756}
757
758/* Add new entry to forwarding table -- assumes lock held */
759static int vxlan_fdb_update(struct vxlan_dev *vxlan,
760 const u8 *mac, union vxlan_addr *ip,
David Stevens66817122013-03-15 04:35:51 +0000761 __u16 state, __u16 flags,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800762 __be16 port, __be32 src_vni, __be32 vni,
Petr Machata0e6160f2018-11-21 08:02:35 +0000763 __u32 ifindex, __u8 ndm_flags,
764 bool swdev_notify)
stephen hemmingerd3428942012-10-01 12:32:35 +0000765{
Roopa Prabhu0813e952018-10-11 12:35:13 -0700766 __u8 fdb_flags = (ndm_flags & ~NTF_USE);
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200767 struct vxlan_rdst *rd = NULL;
stephen hemmingerd3428942012-10-01 12:32:35 +0000768 struct vxlan_fdb *f;
769 int notify = 0;
Haishuang Yan17b46362016-11-29 09:59:36 +0800770 int rc;
stephen hemmingerd3428942012-10-01 12:32:35 +0000771
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800772 f = __vxlan_find_mac(vxlan, mac, src_vni);
stephen hemmingerd3428942012-10-01 12:32:35 +0000773 if (f) {
774 if (flags & NLM_F_EXCL) {
775 netdev_dbg(vxlan->dev,
776 "lost race to create %pM\n", mac);
777 return -EEXIST;
778 }
779 if (f->state != state) {
780 f->state = state;
781 f->updated = jiffies;
782 notify = 1;
783 }
Roopa Prabhu0813e952018-10-11 12:35:13 -0700784 if (f->flags != fdb_flags) {
785 f->flags = fdb_flags;
David Stevensae884082013-04-19 00:36:26 +0000786 f->updated = jiffies;
787 notify = 1;
788 }
Thomas Richter906dc182013-07-19 17:20:07 +0200789 if ((flags & NLM_F_REPLACE)) {
790 /* Only change unicasts */
791 if (!(is_multicast_ether_addr(f->eth_addr) ||
792 is_zero_ether_addr(f->eth_addr))) {
Li RongQing60840422015-04-22 15:49:10 +0800793 notify |= vxlan_fdb_replace(f, ip, port, vni,
Thomas Richter906dc182013-07-19 17:20:07 +0200794 ifindex);
Thomas Richter906dc182013-07-19 17:20:07 +0200795 } else
796 return -EOPNOTSUPP;
797 }
David Stevens66817122013-03-15 04:35:51 +0000798 if ((flags & NLM_F_APPEND) &&
Mike Rapoport58e4c762013-06-25 16:01:56 +0300799 (is_multicast_ether_addr(f->eth_addr) ||
800 is_zero_ether_addr(f->eth_addr))) {
Haishuang Yan17b46362016-11-29 09:59:36 +0800801 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
David Stevens66817122013-03-15 04:35:51 +0000802
803 if (rc < 0)
804 return rc;
805 notify |= rc;
806 }
Roopa Prabhu0813e952018-10-11 12:35:13 -0700807
808 if (ndm_flags & NTF_USE)
809 f->used = jiffies;
stephen hemmingerd3428942012-10-01 12:32:35 +0000810 } else {
811 if (!(flags & NLM_F_CREATE))
812 return -ENOENT;
813
Thomas Richter906dc182013-07-19 17:20:07 +0200814 /* Disallow replace to add a multicast entry */
815 if ((flags & NLM_F_REPLACE) &&
816 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
817 return -EOPNOTSUPP;
818
Cong Wange4c7ed42013-08-31 13:44:33 +0800819 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700820 rc = vxlan_fdb_create(vxlan, mac, ip, state, port, src_vni,
Roopa Prabhu0813e952018-10-11 12:35:13 -0700821 vni, ifindex, fdb_flags, &f);
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700822 if (rc < 0)
Haishuang Yan17b46362016-11-29 09:59:36 +0800823 return rc;
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700824 notify = 1;
stephen hemmingerd3428942012-10-01 12:32:35 +0000825 }
826
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200827 if (notify) {
828 if (rd == NULL)
829 rd = first_remote_rtnl(f);
Petr Machata0e6160f2018-11-21 08:02:35 +0000830 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH, swdev_notify);
Nicolas Dichtel9e4b93f2014-04-22 15:01:30 +0200831 }
stephen hemmingerd3428942012-10-01 12:32:35 +0000832
833 return 0;
834}
835
Wei Yongjun6706c822013-04-11 19:00:35 +0000836static void vxlan_fdb_free(struct rcu_head *head)
David Stevens66817122013-03-15 04:35:51 +0000837{
838 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -0700839 struct vxlan_rdst *rd, *nd;
David Stevens66817122013-03-15 04:35:51 +0000840
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100841 list_for_each_entry_safe(rd, nd, &f->remotes, list) {
842 dst_cache_destroy(&rd->dst_cache);
David Stevens66817122013-03-15 04:35:51 +0000843 kfree(rd);
Paolo Abeni0c1d70a2016-02-12 15:43:56 +0100844 }
David Stevens66817122013-03-15 04:35:51 +0000845 kfree(f);
846}
847
Roopa Prabhu4c2438b2018-07-04 16:46:31 -0700848static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,
Petr Machata0e6160f2018-11-21 08:02:35 +0000849 bool do_notify, bool swdev_notify)
stephen hemmingerd3428942012-10-01 12:32:35 +0000850{
Petr Machata045a5a92018-10-17 08:53:27 +0000851 struct vxlan_rdst *rd;
852
stephen hemmingerd3428942012-10-01 12:32:35 +0000853 netdev_dbg(vxlan->dev,
854 "delete %pM\n", f->eth_addr);
855
856 --vxlan->addrcnt;
Roopa Prabhu4c2438b2018-07-04 16:46:31 -0700857 if (do_notify)
Petr Machata045a5a92018-10-17 08:53:27 +0000858 list_for_each_entry(rd, &f->remotes, list)
Petr Machata0e6160f2018-11-21 08:02:35 +0000859 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH,
860 swdev_notify);
stephen hemmingerd3428942012-10-01 12:32:35 +0000861
862 hlist_del_rcu(&f->hlist);
David Stevens66817122013-03-15 04:35:51 +0000863 call_rcu(&f->rcu, vxlan_fdb_free);
stephen hemmingerd3428942012-10-01 12:32:35 +0000864}
865
Lance Richardson35cf2842017-05-29 13:25:57 -0400866static void vxlan_dst_free(struct rcu_head *head)
867{
868 struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu);
869
870 dst_cache_destroy(&rd->dst_cache);
871 kfree(rd);
872}
873
874static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,
Petr Machata0e6160f2018-11-21 08:02:35 +0000875 struct vxlan_rdst *rd, bool swdev_notify)
Lance Richardson35cf2842017-05-29 13:25:57 -0400876{
877 list_del_rcu(&rd->list);
Petr Machata0e6160f2018-11-21 08:02:35 +0000878 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH, swdev_notify);
Lance Richardson35cf2842017-05-29 13:25:57 -0400879 call_rcu(&rd->rcu, vxlan_dst_free);
880}
881
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300882static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800883 union vxlan_addr *ip, __be16 *port, __be32 *src_vni,
884 __be32 *vni, u32 *ifindex)
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300885{
886 struct net *net = dev_net(vxlan->dev);
Cong Wange4c7ed42013-08-31 13:44:33 +0800887 int err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300888
889 if (tb[NDA_DST]) {
Cong Wange4c7ed42013-08-31 13:44:33 +0800890 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
891 if (err)
892 return err;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300893 } else {
Cong Wange4c7ed42013-08-31 13:44:33 +0800894 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
895 if (remote->sa.sa_family == AF_INET) {
896 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
897 ip->sa.sa_family = AF_INET;
898#if IS_ENABLED(CONFIG_IPV6)
899 } else {
900 ip->sin6.sin6_addr = in6addr_any;
901 ip->sa.sa_family = AF_INET6;
902#endif
903 }
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300904 }
905
906 if (tb[NDA_PORT]) {
907 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
908 return -EINVAL;
909 *port = nla_get_be16(tb[NDA_PORT]);
910 } else {
Thomas Graf0dfbdf42015-07-21 10:44:02 +0200911 *port = vxlan->cfg.dst_port;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300912 }
913
914 if (tb[NDA_VNI]) {
915 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
916 return -EINVAL;
Jiri Benc54bfd872016-02-16 21:58:58 +0100917 *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300918 } else {
919 *vni = vxlan->default_dst.remote_vni;
920 }
921
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800922 if (tb[NDA_SRC_VNI]) {
923 if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32))
924 return -EINVAL;
925 *src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI]));
926 } else {
927 *src_vni = vxlan->default_dst.remote_vni;
928 }
929
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300930 if (tb[NDA_IFINDEX]) {
931 struct net_device *tdev;
932
933 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
934 return -EINVAL;
935 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
Ying Xue73763942014-01-15 10:23:41 +0800936 tdev = __dev_get_by_index(net, *ifindex);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300937 if (!tdev)
938 return -EADDRNOTAVAIL;
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300939 } else {
940 *ifindex = 0;
941 }
942
943 return 0;
944}
945
stephen hemmingerd3428942012-10-01 12:32:35 +0000946/* Add static entry (via netlink) */
947static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
948 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100949 const unsigned char *addr, u16 vid, u16 flags)
stephen hemmingerd3428942012-10-01 12:32:35 +0000950{
951 struct vxlan_dev *vxlan = netdev_priv(dev);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300952 /* struct net *net = dev_net(vxlan->dev); */
Cong Wange4c7ed42013-08-31 13:44:33 +0800953 union vxlan_addr ip;
stephen hemminger73cf3312013-04-27 11:31:54 +0000954 __be16 port;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800955 __be32 src_vni, vni;
Jiri Benc54bfd872016-02-16 21:58:58 +0100956 u32 ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +0000957 int err;
958
959 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
960 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
961 ndm->ndm_state);
962 return -EINVAL;
963 }
964
965 if (tb[NDA_DST] == NULL)
966 return -EINVAL;
967
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800968 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex);
Mike Rapoportf0b074b2013-06-25 16:01:53 +0300969 if (err)
970 return err;
David Stevens66817122013-03-15 04:35:51 +0000971
Mike Rapoport5933a7b2014-04-01 09:23:01 +0300972 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
973 return -EAFNOSUPPORT;
974
stephen hemmingerd3428942012-10-01 12:32:35 +0000975 spin_lock_bh(&vxlan->hash_lock);
Roopa Prabhu25e20e72018-07-04 16:46:30 -0700976 err = vxlan_fdb_update(vxlan, addr, &ip, ndm->ndm_state, flags,
Petr Machata0e6160f2018-11-21 08:02:35 +0000977 port, src_vni, vni, ifindex, ndm->ndm_flags,
978 true);
stephen hemmingerd3428942012-10-01 12:32:35 +0000979 spin_unlock_bh(&vxlan->hash_lock);
980
981 return err;
982}
983
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800984static int __vxlan_fdb_delete(struct vxlan_dev *vxlan,
985 const unsigned char *addr, union vxlan_addr ip,
Xin Longfc39c382017-11-26 21:19:05 +0800986 __be16 port, __be32 src_vni, __be32 vni,
Petr Machata0e6160f2018-11-21 08:02:35 +0000987 u32 ifindex, bool swdev_notify)
stephen hemmingerd3428942012-10-01 12:32:35 +0000988{
stephen hemmingerd3428942012-10-01 12:32:35 +0000989 struct vxlan_fdb *f;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300990 struct vxlan_rdst *rd = NULL;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800991 int err = -ENOENT;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300992
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800993 f = vxlan_find_mac(vxlan, addr, src_vni);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300994 if (!f)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -0800995 return err;
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300996
Cong Wange4c7ed42013-08-31 13:44:33 +0800997 if (!vxlan_addr_any(&ip)) {
998 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
Mike Rapoportbc7892b2013-06-25 16:01:54 +0300999 if (!rd)
1000 goto out;
stephen hemmingerd3428942012-10-01 12:32:35 +00001001 }
Mike Rapoportbc7892b2013-06-25 16:01:54 +03001002
Mike Rapoportbc7892b2013-06-25 16:01:54 +03001003 /* remove a destination if it's not the only one on the list,
1004 * otherwise destroy the fdb entry
1005 */
1006 if (rd && !list_is_singular(&f->remotes)) {
Petr Machata0e6160f2018-11-21 08:02:35 +00001007 vxlan_fdb_dst_destroy(vxlan, f, rd, swdev_notify);
Mike Rapoportbc7892b2013-06-25 16:01:54 +03001008 goto out;
1009 }
1010
Petr Machata0e6160f2018-11-21 08:02:35 +00001011 vxlan_fdb_destroy(vxlan, f, true, swdev_notify);
Mike Rapoportbc7892b2013-06-25 16:01:54 +03001012
1013out:
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001014 return 0;
1015}
1016
1017/* Delete entry (via netlink) */
1018static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
1019 struct net_device *dev,
1020 const unsigned char *addr, u16 vid)
1021{
1022 struct vxlan_dev *vxlan = netdev_priv(dev);
1023 union vxlan_addr ip;
1024 __be32 src_vni, vni;
1025 __be16 port;
1026 u32 ifindex;
1027 int err;
1028
1029 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex);
1030 if (err)
1031 return err;
1032
1033 spin_lock_bh(&vxlan->hash_lock);
Petr Machata0e6160f2018-11-21 08:02:35 +00001034 err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex,
1035 true);
stephen hemmingerd3428942012-10-01 12:32:35 +00001036 spin_unlock_bh(&vxlan->hash_lock);
1037
1038 return err;
1039}
1040
1041/* Dump forwarding table */
1042static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
Jamal Hadi Salim5d5eacb2014-07-10 07:01:58 -04001043 struct net_device *dev,
Roopa Prabhud2976532016-08-30 21:56:45 -07001044 struct net_device *filter_dev, int *idx)
stephen hemmingerd3428942012-10-01 12:32:35 +00001045{
1046 struct vxlan_dev *vxlan = netdev_priv(dev);
1047 unsigned int h;
Roopa Prabhud2976532016-08-30 21:56:45 -07001048 int err = 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00001049
1050 for (h = 0; h < FDB_HASH_SIZE; ++h) {
1051 struct vxlan_fdb *f;
stephen hemmingerd3428942012-10-01 12:32:35 +00001052
Sasha Levinb67bfe02013-02-27 17:06:00 -08001053 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
David Stevens66817122013-03-15 04:35:51 +00001054 struct vxlan_rdst *rd;
stephen hemmingerd3428942012-10-01 12:32:35 +00001055
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001056 list_for_each_entry_rcu(rd, &f->remotes, list) {
Roopa Prabhud2976532016-08-30 21:56:45 -07001057 if (*idx < cb->args[2])
Atzm Watanabe07a51cd2015-08-10 23:39:09 +09001058 goto skip;
1059
David Stevens66817122013-03-15 04:35:51 +00001060 err = vxlan_fdb_info(skb, vxlan, f,
1061 NETLINK_CB(cb->skb).portid,
1062 cb->nlh->nlmsg_seq,
1063 RTM_NEWNEIGH,
1064 NLM_F_MULTI, rd);
Roopa Prabhud2976532016-08-30 21:56:45 -07001065 if (err < 0)
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001066 goto out;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001067skip:
Roopa Prabhud2976532016-08-30 21:56:45 -07001068 *idx += 1;
Atzm Watanabe07a51cd2015-08-10 23:39:09 +09001069 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001070 }
1071 }
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001072out:
Roopa Prabhud2976532016-08-30 21:56:45 -07001073 return err;
stephen hemmingerd3428942012-10-01 12:32:35 +00001074}
1075
1076/* Watch incoming packets to learn mapping between Ethernet address
1077 * and Tunnel endpoint.
Simon Hormanc4b49512015-04-02 11:17:58 +09001078 * Return true if packet is bogus and should be dropped.
stephen hemmingerd3428942012-10-01 12:32:35 +00001079 */
stephen hemminger26a41ae62013-06-17 12:09:58 -07001080static bool vxlan_snoop(struct net_device *dev,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001081 union vxlan_addr *src_ip, const u8 *src_mac,
Matthias Schiffer87613de2017-06-19 10:03:59 +02001082 u32 src_ifindex, __be32 vni)
stephen hemmingerd3428942012-10-01 12:32:35 +00001083{
1084 struct vxlan_dev *vxlan = netdev_priv(dev);
1085 struct vxlan_fdb *f;
Matthias Schiffer87613de2017-06-19 10:03:59 +02001086 u32 ifindex = 0;
1087
1088#if IS_ENABLED(CONFIG_IPV6)
1089 if (src_ip->sa.sa_family == AF_INET6 &&
1090 (ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL))
1091 ifindex = src_ifindex;
1092#endif
stephen hemmingerd3428942012-10-01 12:32:35 +00001093
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001094 f = vxlan_find_mac(vxlan, src_mac, vni);
stephen hemmingerd3428942012-10-01 12:32:35 +00001095 if (likely(f)) {
stephen hemminger5ca54612013-08-04 17:17:39 -07001096 struct vxlan_rdst *rdst = first_remote_rcu(f);
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07001097
Matthias Schiffer87613de2017-06-19 10:03:59 +02001098 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) &&
1099 rdst->remote_ifindex == ifindex))
stephen hemminger26a41ae62013-06-17 12:09:58 -07001100 return false;
1101
1102 /* Don't migrate static entries, drop packets */
Roopa Prabhue0090a92017-06-11 16:32:50 -07001103 if (f->state & (NUD_PERMANENT | NUD_NOARP))
stephen hemminger26a41ae62013-06-17 12:09:58 -07001104 return true;
stephen hemmingerd3428942012-10-01 12:32:35 +00001105
1106 if (net_ratelimit())
1107 netdev_info(dev,
Cong Wange4c7ed42013-08-31 13:44:33 +08001108 "%pM migrated from %pIS to %pIS\n",
Rasmus Villemoesa4870f72015-02-07 03:17:31 +01001109 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
stephen hemmingerd3428942012-10-01 12:32:35 +00001110
Cong Wange4c7ed42013-08-31 13:44:33 +08001111 rdst->remote_ip = *src_ip;
stephen hemmingerd3428942012-10-01 12:32:35 +00001112 f->updated = jiffies;
Petr Machata0e6160f2018-11-21 08:02:35 +00001113 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH, true);
stephen hemmingerd3428942012-10-01 12:32:35 +00001114 } else {
1115 /* learned new entry */
1116 spin_lock(&vxlan->hash_lock);
stephen hemminger3bf74b12013-06-17 12:09:57 -07001117
1118 /* close off race between vxlan_flush and incoming packets */
1119 if (netif_running(dev))
Roopa Prabhu25e20e72018-07-04 16:46:30 -07001120 vxlan_fdb_update(vxlan, src_mac, src_ip,
stephen hemminger3bf74b12013-06-17 12:09:57 -07001121 NUD_REACHABLE,
1122 NLM_F_EXCL|NLM_F_CREATE,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02001123 vxlan->cfg.dst_port,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001124 vni,
stephen hemminger3bf74b12013-06-17 12:09:57 -07001125 vxlan->default_dst.remote_vni,
Petr Machata0e6160f2018-11-21 08:02:35 +00001126 ifindex, NTF_SELF, true);
stephen hemmingerd3428942012-10-01 12:32:35 +00001127 spin_unlock(&vxlan->hash_lock);
1128 }
stephen hemminger26a41ae62013-06-17 12:09:58 -07001129
1130 return false;
stephen hemmingerd3428942012-10-01 12:32:35 +00001131}
1132
stephen hemmingerd3428942012-10-01 12:32:35 +00001133/* See if multicast group is already in use by other ID */
Gao feng95ab0992013-12-10 16:37:33 +08001134static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
stephen hemmingerd3428942012-10-01 12:32:35 +00001135{
stephen hemminger553675f2013-05-16 11:35:20 +00001136 struct vxlan_dev *vxlan;
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001137 struct vxlan_sock *sock4;
Arnd Bergmann4053ab12016-11-07 22:09:07 +01001138#if IS_ENABLED(CONFIG_IPV6)
1139 struct vxlan_sock *sock6;
1140#endif
Jiri Bencb1be00a2015-09-24 13:50:02 +02001141 unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
stephen hemmingerd3428942012-10-01 12:32:35 +00001142
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001143 sock4 = rtnl_dereference(dev->vn4_sock);
1144
Gao feng95ab0992013-12-10 16:37:33 +08001145 /* The vxlan_sock is only used by dev, leaving group has
1146 * no effect on other vxlan devices.
1147 */
Reshetova, Elena66af8462017-07-04 15:52:59 +03001148 if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1)
Gao feng95ab0992013-12-10 16:37:33 +08001149 return false;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001150#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001151 sock6 = rtnl_dereference(dev->vn6_sock);
Reshetova, Elena66af8462017-07-04 15:52:59 +03001152 if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1)
Jiri Bencb1be00a2015-09-24 13:50:02 +02001153 return false;
1154#endif
Gao feng95ab0992013-12-10 16:37:33 +08001155
stephen hemminger553675f2013-05-16 11:35:20 +00001156 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
Gao feng95ab0992013-12-10 16:37:33 +08001157 if (!netif_running(vxlan->dev) || vxlan == dev)
stephen hemminger553675f2013-05-16 11:35:20 +00001158 continue;
stephen hemmingerd3428942012-10-01 12:32:35 +00001159
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001160 if (family == AF_INET &&
1161 rtnl_dereference(vxlan->vn4_sock) != sock4)
Gao feng95ab0992013-12-10 16:37:33 +08001162 continue;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001163#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001164 if (family == AF_INET6 &&
1165 rtnl_dereference(vxlan->vn6_sock) != sock6)
Jiri Bencb1be00a2015-09-24 13:50:02 +02001166 continue;
1167#endif
Gao feng95ab0992013-12-10 16:37:33 +08001168
1169 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1170 &dev->default_dst.remote_ip))
1171 continue;
1172
1173 if (vxlan->default_dst.remote_ifindex !=
1174 dev->default_dst.remote_ifindex)
1175 continue;
1176
1177 return true;
stephen hemminger553675f2013-05-16 11:35:20 +00001178 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001179
1180 return false;
1181}
1182
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001183static bool __vxlan_sock_release_prep(struct vxlan_sock *vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001184{
Jiri Bencb1be00a2015-09-24 13:50:02 +02001185 struct vxlan_net *vn;
Pravin B Shelar012a5722013-08-19 11:23:07 -07001186
Jiri Bencb1be00a2015-09-24 13:50:02 +02001187 if (!vs)
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001188 return false;
Reshetova, Elena66af8462017-07-04 15:52:59 +03001189 if (!refcount_dec_and_test(&vs->refcnt))
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001190 return false;
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001191
Jiri Bencb1be00a2015-09-24 13:50:02 +02001192 vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001193 spin_lock(&vn->sock_lock);
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001194 hlist_del_rcu(&vs->hlist);
Alexander Duycke7b3db52016-06-16 12:20:52 -07001195 udp_tunnel_notify_del_rx_port(vs->sock,
Alexander Duyckb9adcd692016-06-16 12:23:19 -07001196 (vs->flags & VXLAN_F_GPE) ?
1197 UDP_TUNNEL_TYPE_VXLAN_GPE :
Alexander Duycke7b3db52016-06-16 12:20:52 -07001198 UDP_TUNNEL_TYPE_VXLAN);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07001199 spin_unlock(&vn->sock_lock);
1200
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001201 return true;
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001202}
1203
Jiri Bencb1be00a2015-09-24 13:50:02 +02001204static void vxlan_sock_release(struct vxlan_dev *vxlan)
1205{
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001206 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001207#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001208 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1209
Mark Bloch57d88182017-06-07 14:36:58 +03001210 RCU_INIT_POINTER(vxlan->vn6_sock, NULL);
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001211#endif
1212
Mark Bloch57d88182017-06-07 14:36:58 +03001213 RCU_INIT_POINTER(vxlan->vn4_sock, NULL);
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001214 synchronize_net();
1215
Mark Blocha53cb292017-06-02 03:24:08 +03001216 vxlan_vs_del_dev(vxlan);
1217
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001218 if (__vxlan_sock_release_prep(sock4)) {
1219 udp_tunnel_sock_release(sock4->sock);
1220 kfree(sock4);
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001221 }
1222
1223#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001224 if (__vxlan_sock_release_prep(sock6)) {
1225 udp_tunnel_sock_release(sock6->sock);
1226 kfree(sock6);
Hannes Frederic Sowa544a7732016-04-09 12:46:23 +02001227 }
Jiri Bencb1be00a2015-09-24 13:50:02 +02001228#endif
1229}
1230
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001231/* Update multicast group membership when first VNI on
Simon Hormanc4b49512015-04-02 11:17:58 +09001232 * multicast address is brought up
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001233 */
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001234static int vxlan_igmp_join(struct vxlan_dev *vxlan)
Stephen Hemminger7c47ced2013-06-17 14:16:10 -07001235{
Jiri Bencb1be00a2015-09-24 13:50:02 +02001236 struct sock *sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001237 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1238 int ifindex = vxlan->default_dst.remote_ifindex;
Marcelo Ricardo Leitner149d7542015-03-20 10:26:21 -03001239 int ret = -EINVAL;
stephen hemmingerd3428942012-10-01 12:32:35 +00001240
Cong Wange4c7ed42013-08-31 13:44:33 +08001241 if (ip->sa.sa_family == AF_INET) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001242 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
Cong Wange4c7ed42013-08-31 13:44:33 +08001243 struct ip_mreqn mreq = {
1244 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1245 .imr_ifindex = ifindex,
1246 };
1247
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001248 sk = sock4->sock->sk;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001249 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001250 ret = ip_mc_join_group(sk, &mreq);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001251 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001252#if IS_ENABLED(CONFIG_IPV6)
1253 } else {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001254 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1255
1256 sk = sock6->sock->sk;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001257 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001258 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1259 &ip->sin6.sin6_addr);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001260 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001261#endif
1262 }
stephen hemminger3fc2de22013-07-18 08:40:15 -07001263
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001264 return ret;
stephen hemminger3fc2de22013-07-18 08:40:15 -07001265}
1266
1267/* Inverse of vxlan_igmp_join when last VNI is brought down */
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001268static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
stephen hemminger3fc2de22013-07-18 08:40:15 -07001269{
Jiri Bencb1be00a2015-09-24 13:50:02 +02001270 struct sock *sk;
Cong Wange4c7ed42013-08-31 13:44:33 +08001271 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1272 int ifindex = vxlan->default_dst.remote_ifindex;
Marcelo Ricardo Leitner149d7542015-03-20 10:26:21 -03001273 int ret = -EINVAL;
stephen hemminger3fc2de22013-07-18 08:40:15 -07001274
Cong Wange4c7ed42013-08-31 13:44:33 +08001275 if (ip->sa.sa_family == AF_INET) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001276 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
Cong Wange4c7ed42013-08-31 13:44:33 +08001277 struct ip_mreqn mreq = {
1278 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1279 .imr_ifindex = ifindex,
1280 };
1281
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001282 sk = sock4->sock->sk;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001283 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001284 ret = ip_mc_leave_group(sk, &mreq);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001285 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001286#if IS_ENABLED(CONFIG_IPV6)
1287 } else {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07001288 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1289
1290 sk = sock6->sock->sk;
Jiri Bencb1be00a2015-09-24 13:50:02 +02001291 lock_sock(sk);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001292 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1293 &ip->sin6.sin6_addr);
Jiri Bencb1be00a2015-09-24 13:50:02 +02001294 release_sock(sk);
Cong Wange4c7ed42013-08-31 13:44:33 +08001295#endif
1296 }
stephen hemmingerd3428942012-10-01 12:32:35 +00001297
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03001298 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00001299}
1300
Jiri Bencf14eceb2016-02-16 21:59:01 +01001301static bool vxlan_remcsum(struct vxlanhdr *unparsed,
1302 struct sk_buff *skb, u32 vxflags)
Tom Herbertdfd86452015-01-12 17:00:38 -08001303{
Jiri Benc7d34fa72016-03-21 17:50:05 +01001304 size_t start, offset;
Tom Herbertdfd86452015-01-12 17:00:38 -08001305
Jiri Bencf14eceb2016-02-16 21:59:01 +01001306 if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload)
1307 goto out;
Tom Herbertb7fe10e2015-08-19 17:07:32 -07001308
Jiri Bencf14eceb2016-02-16 21:59:01 +01001309 start = vxlan_rco_start(unparsed->vx_vni);
1310 offset = start + vxlan_rco_offset(unparsed->vx_vni);
Tom Herbertdfd86452015-01-12 17:00:38 -08001311
Jiri Benc7d34fa72016-03-21 17:50:05 +01001312 if (!pskb_may_pull(skb, offset + sizeof(u16)))
Jiri Bencbe5cfea2016-02-16 21:58:59 +01001313 return false;
Tom Herbertdfd86452015-01-12 17:00:38 -08001314
Jiri Bencbe5cfea2016-02-16 21:58:59 +01001315 skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset,
1316 !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL));
Jiri Bencf14eceb2016-02-16 21:59:01 +01001317out:
1318 unparsed->vx_flags &= ~VXLAN_HF_RCO;
1319 unparsed->vx_vni &= VXLAN_VNI_MASK;
Jiri Bencbe5cfea2016-02-16 21:58:59 +01001320 return true;
Tom Herbertdfd86452015-01-12 17:00:38 -08001321}
1322
Jiri Bencf14eceb2016-02-16 21:59:01 +01001323static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed,
Jiri Benc64f87d32016-02-23 18:02:55 +01001324 struct sk_buff *skb, u32 vxflags,
Jiri Benc10a5af22016-02-23 18:02:59 +01001325 struct vxlan_metadata *md)
Jiri Benc3288af02016-02-16 21:59:00 +01001326{
Jiri Bencf14eceb2016-02-16 21:59:01 +01001327 struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed;
Jiri Benc10a5af22016-02-23 18:02:59 +01001328 struct metadata_dst *tun_dst;
Jiri Benc3288af02016-02-16 21:59:00 +01001329
Jiri Bencf14eceb2016-02-16 21:59:01 +01001330 if (!(unparsed->vx_flags & VXLAN_HF_GBP))
1331 goto out;
1332
Jiri Benc3288af02016-02-16 21:59:00 +01001333 md->gbp = ntohs(gbp->policy_id);
1334
Jiri Benc10a5af22016-02-23 18:02:59 +01001335 tun_dst = (struct metadata_dst *)skb_dst(skb);
David S. Miller810813c2016-03-08 12:34:12 -05001336 if (tun_dst) {
Jiri Benc3288af02016-02-16 21:59:00 +01001337 tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
David S. Miller810813c2016-03-08 12:34:12 -05001338 tun_dst->u.tun_info.options_len = sizeof(*md);
1339 }
Jiri Benc3288af02016-02-16 21:59:00 +01001340 if (gbp->dont_learn)
1341 md->gbp |= VXLAN_GBP_DONT_LEARN;
1342
1343 if (gbp->policy_applied)
1344 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
Jiri Bencf14eceb2016-02-16 21:59:01 +01001345
Jiri Benc64f87d32016-02-23 18:02:55 +01001346 /* In flow-based mode, GBP is carried in dst_metadata */
1347 if (!(vxflags & VXLAN_F_COLLECT_METADATA))
1348 skb->mark = md->gbp;
Jiri Bencf14eceb2016-02-16 21:59:01 +01001349out:
1350 unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
Jiri Benc3288af02016-02-16 21:59:00 +01001351}
1352
Jiri Bence1e53142016-04-05 14:47:13 +02001353static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed,
Jiri Benc61618ee2016-04-11 17:06:08 +02001354 __be16 *protocol,
Jiri Bence1e53142016-04-05 14:47:13 +02001355 struct sk_buff *skb, u32 vxflags)
1356{
1357 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed;
1358
1359 /* Need to have Next Protocol set for interfaces in GPE mode. */
1360 if (!gpe->np_applied)
1361 return false;
1362 /* "The initial version is 0. If a receiver does not support the
1363 * version indicated it MUST drop the packet.
1364 */
1365 if (gpe->version != 0)
1366 return false;
1367 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1368 * processing MUST occur." However, we don't implement OAM
1369 * processing, thus drop the packet.
1370 */
1371 if (gpe->oam_flag)
1372 return false;
1373
Jiri Bencfa20e0e2017-08-28 21:43:22 +02001374 *protocol = tun_p_to_eth_p(gpe->next_protocol);
1375 if (!*protocol)
Jiri Bence1e53142016-04-05 14:47:13 +02001376 return false;
Jiri Bence1e53142016-04-05 14:47:13 +02001377
1378 unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS;
1379 return true;
1380}
1381
Jiri Benc1ab016e2016-02-23 18:02:56 +01001382static bool vxlan_set_mac(struct vxlan_dev *vxlan,
1383 struct vxlan_sock *vs,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001384 struct sk_buff *skb, __be32 vni)
Thomas Graf614732e2015-07-21 10:44:06 +02001385{
Thomas Graf614732e2015-07-21 10:44:06 +02001386 union vxlan_addr saddr;
Matthias Schiffer87613de2017-06-19 10:03:59 +02001387 u32 ifindex = skb->dev->ifindex;
Thomas Graf614732e2015-07-21 10:44:06 +02001388
Thomas Graf614732e2015-07-21 10:44:06 +02001389 skb_reset_mac_header(skb);
Thomas Graf614732e2015-07-21 10:44:06 +02001390 skb->protocol = eth_type_trans(skb, vxlan->dev);
1391 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1392
1393 /* Ignore packet loops (and multicast echo) */
1394 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
Jiri Benc1ab016e2016-02-23 18:02:56 +01001395 return false;
Thomas Graf614732e2015-07-21 10:44:06 +02001396
Jiri Benc760c6802016-02-23 18:02:57 +01001397 /* Get address from the outer IP header */
Jiri Bencce212d02015-12-07 16:29:08 +01001398 if (vxlan_get_sk_family(vs) == AF_INET) {
Jiri Benc1ab016e2016-02-23 18:02:56 +01001399 saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
Thomas Graf614732e2015-07-21 10:44:06 +02001400 saddr.sa.sa_family = AF_INET;
1401#if IS_ENABLED(CONFIG_IPV6)
1402 } else {
Jiri Benc1ab016e2016-02-23 18:02:56 +01001403 saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
Thomas Graf614732e2015-07-21 10:44:06 +02001404 saddr.sa.sa_family = AF_INET6;
1405#endif
1406 }
1407
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001408 if ((vxlan->cfg.flags & VXLAN_F_LEARN) &&
Matthias Schiffer87613de2017-06-19 10:03:59 +02001409 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni))
Jiri Benc1ab016e2016-02-23 18:02:56 +01001410 return false;
1411
1412 return true;
1413}
1414
Jiri Benc760c6802016-02-23 18:02:57 +01001415static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph,
1416 struct sk_buff *skb)
1417{
1418 int err = 0;
1419
1420 if (vxlan_get_sk_family(vs) == AF_INET)
1421 err = IP_ECN_decapsulate(oiph, skb);
1422#if IS_ENABLED(CONFIG_IPV6)
1423 else
1424 err = IP6_ECN_decapsulate(oiph, skb);
1425#endif
1426
1427 if (unlikely(err) && log_ecn_error) {
1428 if (vxlan_get_sk_family(vs) == AF_INET)
1429 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1430 &((struct iphdr *)oiph)->saddr,
1431 ((struct iphdr *)oiph)->tos);
1432 else
1433 net_info_ratelimited("non-ECT from %pI6\n",
1434 &((struct ipv6hdr *)oiph)->saddr);
1435 }
1436 return err <= 1;
1437}
1438
stephen hemmingerd3428942012-10-01 12:32:35 +00001439/* Callback from net/ipv4/udp.c to receive packets */
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001440static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
stephen hemmingerd3428942012-10-01 12:32:35 +00001441{
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001442 struct pcpu_sw_netstats *stats;
Jiri Bencc9e78ef2016-02-18 11:22:51 +01001443 struct vxlan_dev *vxlan;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001444 struct vxlan_sock *vs;
Jiri Bencf14eceb2016-02-16 21:59:01 +01001445 struct vxlanhdr unparsed;
Thomas Grafee122c72015-07-21 10:43:58 +02001446 struct vxlan_metadata _md;
1447 struct vxlan_metadata *md = &_md;
Jiri Benc61618ee2016-04-11 17:06:08 +02001448 __be16 protocol = htons(ETH_P_TEB);
Jiri Bence1e53142016-04-05 14:47:13 +02001449 bool raw_proto = false;
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001450 void *oiph;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001451 __be32 vni = 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00001452
Jiri Bence1e53142016-04-05 14:47:13 +02001453 /* Need UDP and VXLAN header to be present */
Pravin B Shelar7ce04752013-08-19 11:22:54 -07001454 if (!pskb_may_pull(skb, VXLAN_HLEN))
Hannes Frederic Sowae5aed002016-05-19 15:58:33 +02001455 goto drop;
stephen hemmingerd3428942012-10-01 12:32:35 +00001456
Jiri Bencf14eceb2016-02-16 21:59:01 +01001457 unparsed = *vxlan_hdr(skb);
Jiri Benc288b01c2016-02-16 21:59:02 +01001458 /* VNI flag always required to be set */
1459 if (!(unparsed.vx_flags & VXLAN_HF_VNI)) {
1460 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1461 ntohl(vxlan_hdr(skb)->vx_flags),
1462 ntohl(vxlan_hdr(skb)->vx_vni));
1463 /* Return non vxlan pkt */
Hannes Frederic Sowae5aed002016-05-19 15:58:33 +02001464 goto drop;
stephen hemmingerd3428942012-10-01 12:32:35 +00001465 }
Jiri Benc288b01c2016-02-16 21:59:02 +01001466 unparsed.vx_flags &= ~VXLAN_HF_VNI;
1467 unparsed.vx_vni &= ~VXLAN_VNI_MASK;
stephen hemmingerd3428942012-10-01 12:32:35 +00001468
Pravin B Shelar559835ea2013-09-24 10:25:40 -07001469 vs = rcu_dereference_sk_user_data(sk);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001470 if (!vs)
stephen hemmingerd3428942012-10-01 12:32:35 +00001471 goto drop;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001472
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001473 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);
1474
Matthias Schiffer49f810f2017-06-19 10:04:00 +02001475 vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni);
Jiri Bencc9e78ef2016-02-18 11:22:51 +01001476 if (!vxlan)
1477 goto drop;
1478
Jiri Bence1e53142016-04-05 14:47:13 +02001479 /* For backwards compatibility, only allow reserved fields to be
1480 * used by VXLAN extensions if explicitly requested.
1481 */
1482 if (vs->flags & VXLAN_F_GPE) {
1483 if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags))
1484 goto drop;
1485 raw_proto = true;
1486 }
1487
1488 if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto,
1489 !net_eq(vxlan->net, dev_net(vxlan->dev))))
1490 goto drop;
Jiri Bencc9e78ef2016-02-18 11:22:51 +01001491
Thomas Grafee122c72015-07-21 10:43:58 +02001492 if (vxlan_collect_metadata(vs)) {
Jiri Benc10a5af22016-02-23 18:02:59 +01001493 struct metadata_dst *tun_dst;
Jiri Benc07dabf22016-02-18 19:19:29 +01001494
Pravin B Shelarc29a70d2015-08-26 23:46:50 -07001495 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
Amir Vadaid817f432016-09-08 16:23:45 +03001496 key32_to_tunnel_id(vni), sizeof(*md));
Pravin B Shelarc29a70d2015-08-26 23:46:50 -07001497
Thomas Grafee122c72015-07-21 10:43:58 +02001498 if (!tun_dst)
1499 goto drop;
1500
Geert Uytterhoeven0f1b7352015-09-04 12:49:32 +02001501 md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
Jiri Benc10a5af22016-02-23 18:02:59 +01001502
1503 skb_dst_set(skb, (struct dst_entry *)tun_dst);
Thomas Grafee122c72015-07-21 10:43:58 +02001504 } else {
1505 memset(md, 0, sizeof(*md));
1506 }
1507
Jiri Bencf14eceb2016-02-16 21:59:01 +01001508 if (vs->flags & VXLAN_F_REMCSUM_RX)
1509 if (!vxlan_remcsum(&unparsed, skb, vs->flags))
1510 goto drop;
1511 if (vs->flags & VXLAN_F_GBP)
Jiri Benc10a5af22016-02-23 18:02:59 +01001512 vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md);
Jiri Bence1e53142016-04-05 14:47:13 +02001513 /* Note that GBP and GPE can never be active together. This is
1514 * ensured in vxlan_dev_configure.
1515 */
Thomas Graf35114942015-01-15 03:53:55 +01001516
Jiri Bencf14eceb2016-02-16 21:59:01 +01001517 if (unparsed.vx_flags || unparsed.vx_vni) {
Tom Herbert3bf39472015-01-08 12:31:18 -08001518 /* If there are any unprocessed flags remaining treat
1519 * this as a malformed packet. This behavior diverges from
1520 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1521 * in reserved fields are to be ignored. The approach here
Simon Hormanc4b49512015-04-02 11:17:58 +09001522 * maintains compatibility with previous stack code, and also
Tom Herbert3bf39472015-01-08 12:31:18 -08001523 * is more robust and provides a little more security in
1524 * adding extensions to VXLAN.
1525 */
Jiri Benc288b01c2016-02-16 21:59:02 +01001526 goto drop;
Tom Herbert3bf39472015-01-08 12:31:18 -08001527 }
1528
Jiri Bence1e53142016-04-05 14:47:13 +02001529 if (!raw_proto) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001530 if (!vxlan_set_mac(vxlan, vs, skb, vni))
Jiri Bence1e53142016-04-05 14:47:13 +02001531 goto drop;
1532 } else {
Jiri Benc8be0cfa2016-05-13 10:48:42 +02001533 skb_reset_mac_header(skb);
Jiri Bence1e53142016-04-05 14:47:13 +02001534 skb->dev = vxlan->dev;
1535 skb->pkt_type = PACKET_HOST;
1536 }
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001537
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01001538 oiph = skb_network_header(skb);
1539 skb_reset_network_header(skb);
1540
1541 if (!vxlan_ecn_decapsulate(vs, oiph, skb)) {
1542 ++vxlan->dev->stats.rx_frame_errors;
1543 ++vxlan->dev->stats.rx_errors;
1544 goto drop;
1545 }
1546
1547 stats = this_cpu_ptr(vxlan->dev->tstats);
1548 u64_stats_update_begin(&stats->syncp);
1549 stats->rx_packets++;
1550 stats->rx_bytes += skb->len;
1551 u64_stats_update_end(&stats->syncp);
1552
1553 gro_cells_receive(&vxlan->gro_cells, skb);
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001554 return 0;
1555
1556drop:
Jiri Benc288b01c2016-02-16 21:59:02 +01001557 /* Consume bad packet */
1558 kfree_skb(skb);
1559 return 0;
Pravin B Shelar5cfccc52013-08-19 11:23:02 -07001560}
1561
Stefano Brivioc3a43b92018-11-08 12:19:15 +01001562/* Callback from net/ipv{4,6}/udp.c to check that we have a VNI for errors */
1563static int vxlan_err_lookup(struct sock *sk, struct sk_buff *skb)
1564{
1565 struct vxlan_dev *vxlan;
1566 struct vxlan_sock *vs;
1567 struct vxlanhdr *hdr;
1568 __be32 vni;
1569
1570 if (skb->len < VXLAN_HLEN)
1571 return -EINVAL;
1572
1573 hdr = vxlan_hdr(skb);
1574
1575 if (!(hdr->vx_flags & VXLAN_HF_VNI))
1576 return -EINVAL;
1577
1578 vs = rcu_dereference_sk_user_data(sk);
1579 if (!vs)
1580 return -ENOENT;
1581
1582 vni = vxlan_vni(hdr->vx_vni);
1583 vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni);
1584 if (!vxlan)
1585 return -ENOENT;
1586
1587 return 0;
1588}
1589
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001590static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
David Stevense4f67ad2012-11-20 02:50:14 +00001591{
1592 struct vxlan_dev *vxlan = netdev_priv(dev);
1593 struct arphdr *parp;
1594 u8 *arpptr, *sha;
1595 __be32 sip, tip;
1596 struct neighbour *n;
1597
1598 if (dev->flags & IFF_NOARP)
1599 goto out;
1600
1601 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1602 dev->stats.tx_dropped++;
1603 goto out;
1604 }
1605 parp = arp_hdr(skb);
1606
1607 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1608 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1609 parp->ar_pro != htons(ETH_P_IP) ||
1610 parp->ar_op != htons(ARPOP_REQUEST) ||
1611 parp->ar_hln != dev->addr_len ||
1612 parp->ar_pln != 4)
1613 goto out;
1614 arpptr = (u8 *)parp + sizeof(struct arphdr);
1615 sha = arpptr;
1616 arpptr += dev->addr_len; /* sha */
1617 memcpy(&sip, arpptr, sizeof(sip));
1618 arpptr += sizeof(sip);
1619 arpptr += dev->addr_len; /* tha */
1620 memcpy(&tip, arpptr, sizeof(tip));
1621
1622 if (ipv4_is_loopback(tip) ||
1623 ipv4_is_multicast(tip))
1624 goto out;
1625
1626 n = neigh_lookup(&arp_tbl, &tip, dev);
1627
1628 if (n) {
David Stevense4f67ad2012-11-20 02:50:14 +00001629 struct vxlan_fdb *f;
1630 struct sk_buff *reply;
1631
1632 if (!(n->nud_state & NUD_CONNECTED)) {
1633 neigh_release(n);
1634 goto out;
1635 }
1636
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001637 f = vxlan_find_mac(vxlan, n->ha, vni);
Cong Wange4c7ed42013-08-31 13:44:33 +08001638 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
David Stevense4f67ad2012-11-20 02:50:14 +00001639 /* bridge-local neighbor */
1640 neigh_release(n);
1641 goto out;
1642 }
1643
1644 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1645 n->ha, sha);
1646
1647 neigh_release(n);
1648
David Stevens73461352014-03-18 12:32:29 -04001649 if (reply == NULL)
1650 goto out;
1651
David Stevense4f67ad2012-11-20 02:50:14 +00001652 skb_reset_mac_header(reply);
1653 __skb_pull(reply, skb_network_offset(reply));
1654 reply->ip_summed = CHECKSUM_UNNECESSARY;
1655 reply->pkt_type = PACKET_HOST;
1656
1657 if (netif_rx_ni(reply) == NET_RX_DROP)
1658 dev->stats.rx_dropped++;
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001659 } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) {
Cong Wange4c7ed42013-08-31 13:44:33 +08001660 union vxlan_addr ipa = {
1661 .sin.sin_addr.s_addr = tip,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001662 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001663 };
1664
1665 vxlan_ip_miss(dev, &ipa);
1666 }
David Stevense4f67ad2012-11-20 02:50:14 +00001667out:
1668 consume_skb(skb);
1669 return NETDEV_TX_OK;
1670}
1671
Cong Wangf564f452013-08-31 13:44:36 +08001672#if IS_ENABLED(CONFIG_IPV6)
David Stevens4b29dba2014-03-24 10:39:58 -04001673static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1674 struct neighbour *n, bool isrouter)
1675{
1676 struct net_device *dev = request->dev;
1677 struct sk_buff *reply;
1678 struct nd_msg *ns, *na;
1679 struct ipv6hdr *pip6;
1680 u8 *daddr;
1681 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1682 int ns_olen;
1683 int i, len;
1684
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02001685 if (dev == NULL || !pskb_may_pull(request, request->len))
David Stevens4b29dba2014-03-24 10:39:58 -04001686 return NULL;
1687
1688 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1689 sizeof(*na) + na_olen + dev->needed_tailroom;
1690 reply = alloc_skb(len, GFP_ATOMIC);
1691 if (reply == NULL)
1692 return NULL;
1693
1694 reply->protocol = htons(ETH_P_IPV6);
1695 reply->dev = dev;
1696 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1697 skb_push(reply, sizeof(struct ethhdr));
Zhang Shengju6297b912016-03-03 01:16:54 +00001698 skb_reset_mac_header(reply);
David Stevens4b29dba2014-03-24 10:39:58 -04001699
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02001700 ns = (struct nd_msg *)(ipv6_hdr(request) + 1);
David Stevens4b29dba2014-03-24 10:39:58 -04001701
1702 daddr = eth_hdr(request)->h_source;
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02001703 ns_olen = request->len - skb_network_offset(request) -
1704 sizeof(struct ipv6hdr) - sizeof(*ns);
David Stevens4b29dba2014-03-24 10:39:58 -04001705 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1706 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1707 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1708 break;
1709 }
1710 }
1711
1712 /* Ethernet header */
1713 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1714 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1715 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1716 reply->protocol = htons(ETH_P_IPV6);
1717
1718 skb_pull(reply, sizeof(struct ethhdr));
Zhang Shengju6297b912016-03-03 01:16:54 +00001719 skb_reset_network_header(reply);
David Stevens4b29dba2014-03-24 10:39:58 -04001720 skb_put(reply, sizeof(struct ipv6hdr));
1721
1722 /* IPv6 header */
1723
1724 pip6 = ipv6_hdr(reply);
1725 memset(pip6, 0, sizeof(struct ipv6hdr));
1726 pip6->version = 6;
1727 pip6->priority = ipv6_hdr(request)->priority;
1728 pip6->nexthdr = IPPROTO_ICMPV6;
1729 pip6->hop_limit = 255;
1730 pip6->daddr = ipv6_hdr(request)->saddr;
1731 pip6->saddr = *(struct in6_addr *)n->primary_key;
1732
1733 skb_pull(reply, sizeof(struct ipv6hdr));
Zhang Shengju6297b912016-03-03 01:16:54 +00001734 skb_reset_transport_header(reply);
David Stevens4b29dba2014-03-24 10:39:58 -04001735
David Stevens4b29dba2014-03-24 10:39:58 -04001736 /* Neighbor Advertisement */
Johannes Bergb080db52017-06-16 14:29:19 +02001737 na = skb_put_zero(reply, sizeof(*na) + na_olen);
David Stevens4b29dba2014-03-24 10:39:58 -04001738 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1739 na->icmph.icmp6_router = isrouter;
1740 na->icmph.icmp6_override = 1;
1741 na->icmph.icmp6_solicited = 1;
1742 na->target = ns->target;
1743 ether_addr_copy(&na->opt[2], n->ha);
1744 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1745 na->opt[1] = na_olen >> 3;
1746
1747 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1748 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1749 csum_partial(na, sizeof(*na)+na_olen, 0));
1750
1751 pip6->payload_len = htons(sizeof(*na)+na_olen);
1752
1753 skb_push(reply, sizeof(struct ipv6hdr));
1754
1755 reply->ip_summed = CHECKSUM_UNNECESSARY;
1756
1757 return reply;
1758}
1759
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001760static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
Cong Wangf564f452013-08-31 13:44:36 +08001761{
1762 struct vxlan_dev *vxlan = netdev_priv(dev);
Roopa Prabhu8dcd81a2017-02-20 08:41:16 -08001763 const struct in6_addr *daddr;
Xin Long8bff36852017-11-11 19:58:50 +08001764 const struct ipv6hdr *iphdr;
David Stevens4b29dba2014-03-24 10:39:58 -04001765 struct inet6_dev *in6_dev;
Xin Long8bff36852017-11-11 19:58:50 +08001766 struct neighbour *n;
1767 struct nd_msg *msg;
Cong Wangf564f452013-08-31 13:44:36 +08001768
1769 in6_dev = __in6_dev_get(dev);
1770 if (!in6_dev)
1771 goto out;
1772
Cong Wangf564f452013-08-31 13:44:36 +08001773 iphdr = ipv6_hdr(skb);
Cong Wangf564f452013-08-31 13:44:36 +08001774 daddr = &iphdr->daddr;
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02001775 msg = (struct nd_msg *)(iphdr + 1);
Cong Wangf564f452013-08-31 13:44:36 +08001776
David Stevens4b29dba2014-03-24 10:39:58 -04001777 if (ipv6_addr_loopback(daddr) ||
1778 ipv6_addr_is_multicast(&msg->target))
1779 goto out;
1780
1781 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
Cong Wangf564f452013-08-31 13:44:36 +08001782
1783 if (n) {
1784 struct vxlan_fdb *f;
David Stevens4b29dba2014-03-24 10:39:58 -04001785 struct sk_buff *reply;
Cong Wangf564f452013-08-31 13:44:36 +08001786
1787 if (!(n->nud_state & NUD_CONNECTED)) {
1788 neigh_release(n);
1789 goto out;
1790 }
1791
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08001792 f = vxlan_find_mac(vxlan, n->ha, vni);
Cong Wangf564f452013-08-31 13:44:36 +08001793 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1794 /* bridge-local neighbor */
1795 neigh_release(n);
1796 goto out;
1797 }
1798
David Stevens4b29dba2014-03-24 10:39:58 -04001799 reply = vxlan_na_create(skb, n,
1800 !!(f ? f->flags & NTF_ROUTER : 0));
1801
Cong Wangf564f452013-08-31 13:44:36 +08001802 neigh_release(n);
David Stevens4b29dba2014-03-24 10:39:58 -04001803
1804 if (reply == NULL)
1805 goto out;
1806
1807 if (netif_rx_ni(reply) == NET_RX_DROP)
1808 dev->stats.rx_dropped++;
1809
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001810 } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) {
David Stevens4b29dba2014-03-24 10:39:58 -04001811 union vxlan_addr ipa = {
1812 .sin6.sin6_addr = msg->target,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001813 .sin6.sin6_family = AF_INET6,
David Stevens4b29dba2014-03-24 10:39:58 -04001814 };
1815
Cong Wangf564f452013-08-31 13:44:36 +08001816 vxlan_ip_miss(dev, &ipa);
1817 }
1818
1819out:
1820 consume_skb(skb);
1821 return NETDEV_TX_OK;
1822}
1823#endif
1824
David Stevense4f67ad2012-11-20 02:50:14 +00001825static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1826{
1827 struct vxlan_dev *vxlan = netdev_priv(dev);
1828 struct neighbour *n;
David Stevense4f67ad2012-11-20 02:50:14 +00001829
1830 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1831 return false;
1832
1833 n = NULL;
1834 switch (ntohs(eth_hdr(skb)->h_proto)) {
1835 case ETH_P_IP:
Cong Wange15a00a2013-08-31 13:44:34 +08001836 {
1837 struct iphdr *pip;
1838
David Stevense4f67ad2012-11-20 02:50:14 +00001839 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1840 return false;
1841 pip = ip_hdr(skb);
1842 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001843 if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) {
Cong Wange4c7ed42013-08-31 13:44:33 +08001844 union vxlan_addr ipa = {
1845 .sin.sin_addr.s_addr = pip->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001846 .sin.sin_family = AF_INET,
Cong Wange4c7ed42013-08-31 13:44:33 +08001847 };
1848
1849 vxlan_ip_miss(dev, &ipa);
1850 return false;
1851 }
1852
David Stevense4f67ad2012-11-20 02:50:14 +00001853 break;
Cong Wange15a00a2013-08-31 13:44:34 +08001854 }
1855#if IS_ENABLED(CONFIG_IPV6)
1856 case ETH_P_IPV6:
1857 {
1858 struct ipv6hdr *pip6;
1859
1860 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1861 return false;
1862 pip6 = ipv6_hdr(skb);
1863 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
Matthias Schifferdc5321d2017-06-19 10:03:56 +02001864 if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) {
Cong Wange15a00a2013-08-31 13:44:34 +08001865 union vxlan_addr ipa = {
1866 .sin6.sin6_addr = pip6->daddr,
Gerhard Stenzela45e92a2014-08-22 21:34:16 +02001867 .sin6.sin6_family = AF_INET6,
Cong Wange15a00a2013-08-31 13:44:34 +08001868 };
1869
1870 vxlan_ip_miss(dev, &ipa);
1871 return false;
1872 }
1873
1874 break;
1875 }
1876#endif
David Stevense4f67ad2012-11-20 02:50:14 +00001877 default:
1878 return false;
1879 }
1880
1881 if (n) {
1882 bool diff;
1883
Joe Perches7367d0b2013-09-01 11:51:23 -07001884 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
David Stevense4f67ad2012-11-20 02:50:14 +00001885 if (diff) {
1886 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1887 dev->addr_len);
1888 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1889 }
1890 neigh_release(n);
1891 return diff;
Cong Wange4c7ed42013-08-31 13:44:33 +08001892 }
1893
David Stevense4f67ad2012-11-20 02:50:14 +00001894 return false;
1895}
1896
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001897static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
Thomas Graf35114942015-01-15 03:53:55 +01001898 struct vxlan_metadata *md)
1899{
1900 struct vxlanhdr_gbp *gbp;
1901
Thomas Grafdb79a622015-02-04 17:00:04 +01001902 if (!md->gbp)
1903 return;
1904
Thomas Graf35114942015-01-15 03:53:55 +01001905 gbp = (struct vxlanhdr_gbp *)vxh;
Jiri Benc54bfd872016-02-16 21:58:58 +01001906 vxh->vx_flags |= VXLAN_HF_GBP;
Thomas Graf35114942015-01-15 03:53:55 +01001907
1908 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1909 gbp->dont_learn = 1;
1910
1911 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1912 gbp->policy_applied = 1;
1913
1914 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1915}
1916
Jiri Bence1e53142016-04-05 14:47:13 +02001917static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags,
1918 __be16 protocol)
1919{
1920 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh;
1921
1922 gpe->np_applied = 1;
Jiri Bencfa20e0e2017-08-28 21:43:22 +02001923 gpe->next_protocol = tun_p_from_eth_p(protocol);
1924 if (!gpe->next_protocol)
1925 return -EPFNOSUPPORT;
1926 return 0;
Jiri Bence1e53142016-04-05 14:47:13 +02001927}
1928
Jiri Bencf491e562016-02-02 18:09:16 +01001929static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
1930 int iphdr_len, __be32 vni,
1931 struct vxlan_metadata *md, u32 vxflags,
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01001932 bool udp_sum)
Cong Wange4c7ed42013-08-31 13:44:33 +08001933{
Cong Wange4c7ed42013-08-31 13:44:33 +08001934 struct vxlanhdr *vxh;
Cong Wange4c7ed42013-08-31 13:44:33 +08001935 int min_headroom;
1936 int err;
Tom Herbertdfd86452015-01-12 17:00:38 -08001937 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
Jiri Bence1e53142016-04-05 14:47:13 +02001938 __be16 inner_protocol = htons(ETH_P_TEB);
Cong Wange4c7ed42013-08-31 13:44:33 +08001939
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001940 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
Tom Herbertdfd86452015-01-12 17:00:38 -08001941 skb->ip_summed == CHECKSUM_PARTIAL) {
1942 int csum_start = skb_checksum_start_offset(skb);
1943
1944 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1945 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1946 (skb->csum_offset == offsetof(struct udphdr, check) ||
Edward Creeb5708502016-02-11 20:57:17 +00001947 skb->csum_offset == offsetof(struct tcphdr, check)))
Tom Herbertdfd86452015-01-12 17:00:38 -08001948 type |= SKB_GSO_TUNNEL_REMCSUM;
Tom Herbertdfd86452015-01-12 17:00:38 -08001949 }
1950
Cong Wange4c7ed42013-08-31 13:44:33 +08001951 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
pravin shelar4a4f86c2016-11-13 20:43:52 -08001952 + VXLAN_HLEN + iphdr_len;
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001953
1954 /* Need space for new headers (invalidates iph ptr) */
1955 err = skb_cow_head(skb, min_headroom);
Jiri Bence1e53142016-04-05 14:47:13 +02001956 if (unlikely(err))
pravin shelarc46b7892016-11-13 20:43:54 -08001957 return err;
Pravin B Shelar649c5b82013-08-19 11:23:22 -07001958
Alexander Duyckaed069d2016-04-14 15:33:37 -04001959 err = iptunnel_handle_offloads(skb, type);
1960 if (err)
pravin shelarc46b7892016-11-13 20:43:54 -08001961 return err;
Jesse Grossb736a622015-04-09 11:19:14 -07001962
Johannes Bergd58ff352017-06-16 14:29:23 +02001963 vxh = __skb_push(skb, sizeof(*vxh));
Jiri Benc54bfd872016-02-16 21:58:58 +01001964 vxh->vx_flags = VXLAN_HF_VNI;
1965 vxh->vx_vni = vxlan_vni_field(vni);
Pravin B Shelar49560532013-08-19 11:23:17 -07001966
Tom Herbertdfd86452015-01-12 17:00:38 -08001967 if (type & SKB_GSO_TUNNEL_REMCSUM) {
Jiri Benc54bfd872016-02-16 21:58:58 +01001968 unsigned int start;
Tom Herbertdfd86452015-01-12 17:00:38 -08001969
Jiri Benc54bfd872016-02-16 21:58:58 +01001970 start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr);
1971 vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset);
1972 vxh->vx_flags |= VXLAN_HF_RCO;
Tom Herbertdfd86452015-01-12 17:00:38 -08001973
1974 if (!skb_is_gso(skb)) {
1975 skb->ip_summed = CHECKSUM_NONE;
1976 skb->encapsulation = 0;
1977 }
1978 }
1979
Tom Herbertaf33c1a2015-01-20 11:23:05 -08001980 if (vxflags & VXLAN_F_GBP)
1981 vxlan_build_gbp_hdr(vxh, vxflags, md);
Jiri Bence1e53142016-04-05 14:47:13 +02001982 if (vxflags & VXLAN_F_GPE) {
1983 err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol);
1984 if (err < 0)
pravin shelarc46b7892016-11-13 20:43:54 -08001985 return err;
Jiri Bence1e53142016-04-05 14:47:13 +02001986 inner_protocol = skb->protocol;
1987 }
Thomas Graf35114942015-01-15 03:53:55 +01001988
Jiri Bence1e53142016-04-05 14:47:13 +02001989 skb_set_inner_protocol(skb, inner_protocol);
Pravin B Shelar039f5062015-12-24 14:34:54 -08001990 return 0;
Pravin B Shelar49560532013-08-19 11:23:17 -07001991}
Pravin B Shelar49560532013-08-19 11:23:17 -07001992
pravin shelar655c3de2016-11-13 20:43:55 -08001993static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev,
1994 struct vxlan_sock *sock4,
Jiri Benc1a8496b2016-02-02 18:09:14 +01001995 struct sk_buff *skb, int oif, u8 tos,
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00001996 __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport,
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01001997 struct dst_cache *dst_cache,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01001998 const struct ip_tunnel_info *info)
Jiri Benc1a8496b2016-02-02 18:09:14 +01001999{
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002000 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
Jiri Benc1a8496b2016-02-02 18:09:14 +01002001 struct rtable *rt = NULL;
2002 struct flowi4 fl4;
2003
pravin shelar655c3de2016-11-13 20:43:55 -08002004 if (!sock4)
2005 return ERR_PTR(-EIO);
2006
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002007 if (tos && !info)
2008 use_cache = false;
2009 if (use_cache) {
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002010 rt = dst_cache_get_ip4(dst_cache, saddr);
2011 if (rt)
2012 return rt;
2013 }
2014
Jiri Benc1a8496b2016-02-02 18:09:14 +01002015 memset(&fl4, 0, sizeof(fl4));
2016 fl4.flowi4_oif = oif;
2017 fl4.flowi4_tos = RT_TOS(tos);
2018 fl4.flowi4_mark = skb->mark;
2019 fl4.flowi4_proto = IPPROTO_UDP;
2020 fl4.daddr = daddr;
pravin shelar272d96a2016-08-05 17:45:36 -07002021 fl4.saddr = *saddr;
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00002022 fl4.fl4_dport = dport;
2023 fl4.fl4_sport = sport;
Jiri Benc1a8496b2016-02-02 18:09:14 +01002024
2025 rt = ip_route_output_key(vxlan->net, &fl4);
pravin shelar655c3de2016-11-13 20:43:55 -08002026 if (likely(!IS_ERR(rt))) {
2027 if (rt->dst.dev == dev) {
2028 netdev_dbg(dev, "circular route to %pI4\n", &daddr);
2029 ip_rt_put(rt);
2030 return ERR_PTR(-ELOOP);
2031 }
2032
Jiri Benc1a8496b2016-02-02 18:09:14 +01002033 *saddr = fl4.saddr;
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002034 if (use_cache)
2035 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
pravin shelar655c3de2016-11-13 20:43:55 -08002036 } else {
2037 netdev_dbg(dev, "no route to %pI4\n", &daddr);
2038 return ERR_PTR(-ENETUNREACH);
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002039 }
Jiri Benc1a8496b2016-02-02 18:09:14 +01002040 return rt;
2041}
2042
Jiri Bence5d4b292015-12-07 13:04:30 +01002043#if IS_ENABLED(CONFIG_IPV6)
2044static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
pravin shelar655c3de2016-11-13 20:43:55 -08002045 struct net_device *dev,
pravin shelar03dc52a2016-11-13 20:43:53 -08002046 struct vxlan_sock *sock6,
Daniel Borkmann14006152016-03-04 15:15:08 +01002047 struct sk_buff *skb, int oif, u8 tos,
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002048 __be32 label,
Jiri Bence5d4b292015-12-07 13:04:30 +01002049 const struct in6_addr *daddr,
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002050 struct in6_addr *saddr,
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00002051 __be16 dport, __be16 sport,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002052 struct dst_cache *dst_cache,
2053 const struct ip_tunnel_info *info)
Jiri Bence5d4b292015-12-07 13:04:30 +01002054{
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002055 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
Jiri Bence5d4b292015-12-07 13:04:30 +01002056 struct dst_entry *ndst;
2057 struct flowi6 fl6;
2058 int err;
2059
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002060 if (!sock6)
2061 return ERR_PTR(-EIO);
2062
Daniel Borkmann14006152016-03-04 15:15:08 +01002063 if (tos && !info)
2064 use_cache = false;
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002065 if (use_cache) {
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002066 ndst = dst_cache_get_ip6(dst_cache, saddr);
2067 if (ndst)
2068 return ndst;
2069 }
2070
Jiri Bence5d4b292015-12-07 13:04:30 +01002071 memset(&fl6, 0, sizeof(fl6));
2072 fl6.flowi6_oif = oif;
2073 fl6.daddr = *daddr;
pravin shelar272d96a2016-08-05 17:45:36 -07002074 fl6.saddr = *saddr;
Daniel Borkmanneaa93bf2016-03-18 18:37:57 +01002075 fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label);
Jiri Bence5d4b292015-12-07 13:04:30 +01002076 fl6.flowi6_mark = skb->mark;
2077 fl6.flowi6_proto = IPPROTO_UDP;
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00002078 fl6.fl6_dport = dport;
2079 fl6.fl6_sport = sport;
Jiri Bence5d4b292015-12-07 13:04:30 +01002080
2081 err = ipv6_stub->ipv6_dst_lookup(vxlan->net,
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002082 sock6->sock->sk,
Jiri Bence5d4b292015-12-07 13:04:30 +01002083 &ndst, &fl6);
pravin shelar655c3de2016-11-13 20:43:55 -08002084 if (unlikely(err < 0)) {
2085 netdev_dbg(dev, "no route to %pI6\n", daddr);
2086 return ERR_PTR(-ENETUNREACH);
2087 }
2088
2089 if (unlikely(ndst->dev == dev)) {
2090 netdev_dbg(dev, "circular route to %pI6\n", daddr);
2091 dst_release(ndst);
2092 return ERR_PTR(-ELOOP);
2093 }
Jiri Bence5d4b292015-12-07 13:04:30 +01002094
2095 *saddr = fl6.saddr;
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002096 if (use_cache)
Paolo Abeni0c1d70a2016-02-12 15:43:56 +01002097 dst_cache_set_ip6(dst_cache, ndst, saddr);
Jiri Bence5d4b292015-12-07 13:04:30 +01002098 return ndst;
2099}
2100#endif
2101
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002102/* Bypass encapsulation if the destination is local */
2103static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002104 struct vxlan_dev *dst_vxlan, __be32 vni)
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002105{
Li RongQing8f849852014-01-04 13:57:59 +08002106 struct pcpu_sw_netstats *tx_stats, *rx_stats;
Cong Wange4c7ed42013-08-31 13:44:33 +08002107 union vxlan_addr loopback;
2108 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
Li RongQingce6502a2014-10-16 08:49:41 +08002109 struct net_device *dev = skb->dev;
2110 int len = skb->len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002111
Li RongQing8f849852014-01-04 13:57:59 +08002112 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
2113 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002114 skb->pkt_type = PACKET_HOST;
2115 skb->encapsulation = 0;
2116 skb->dev = dst_vxlan->dev;
2117 __skb_pull(skb, skb_network_offset(skb));
2118
Cong Wange4c7ed42013-08-31 13:44:33 +08002119 if (remote_ip->sa.sa_family == AF_INET) {
2120 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2121 loopback.sa.sa_family = AF_INET;
2122#if IS_ENABLED(CONFIG_IPV6)
2123 } else {
2124 loopback.sin6.sin6_addr = in6addr_loopback;
2125 loopback.sa.sa_family = AF_INET6;
2126#endif
2127 }
2128
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002129 if (dst_vxlan->cfg.flags & VXLAN_F_LEARN)
Matthias Schiffer87613de2017-06-19 10:03:59 +02002130 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source, 0,
2131 vni);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002132
2133 u64_stats_update_begin(&tx_stats->syncp);
2134 tx_stats->tx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08002135 tx_stats->tx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002136 u64_stats_update_end(&tx_stats->syncp);
2137
2138 if (netif_rx(skb) == NET_RX_SUCCESS) {
2139 u64_stats_update_begin(&rx_stats->syncp);
2140 rx_stats->rx_packets++;
Li RongQingce6502a2014-10-16 08:49:41 +08002141 rx_stats->rx_bytes += len;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002142 u64_stats_update_end(&rx_stats->syncp);
2143 } else {
Li RongQingce6502a2014-10-16 08:49:41 +08002144 dev->stats.rx_dropped++;
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002145 }
2146}
2147
pravin shelarfee1fad2016-11-13 20:43:56 -08002148static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev,
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002149 struct vxlan_dev *vxlan,
2150 union vxlan_addr *daddr,
2151 __be16 dst_port, int dst_ifindex, __be32 vni,
2152 struct dst_entry *dst,
pravin shelarfee1fad2016-11-13 20:43:56 -08002153 u32 rt_flags)
2154{
2155#if IS_ENABLED(CONFIG_IPV6)
2156 /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of
2157 * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple
2158 * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry.
2159 */
2160 BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL);
2161#endif
2162 /* Bypass encapsulation if the destination is local */
2163 if (rt_flags & RTCF_LOCAL &&
2164 !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
2165 struct vxlan_dev *dst_vxlan;
2166
2167 dst_release(dst);
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002168 dst_vxlan = vxlan_find_vni(vxlan->net, dst_ifindex, vni,
pravin shelarfee1fad2016-11-13 20:43:56 -08002169 daddr->sa.sa_family, dst_port,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002170 vxlan->cfg.flags);
pravin shelarfee1fad2016-11-13 20:43:56 -08002171 if (!dst_vxlan) {
2172 dev->stats.tx_errors++;
2173 kfree_skb(skb);
2174
2175 return -ENOENT;
2176 }
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002177 vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni);
pravin shelarfee1fad2016-11-13 20:43:56 -08002178 return 1;
2179 }
2180
2181 return 0;
2182}
2183
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002184static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002185 __be32 default_vni, struct vxlan_rdst *rdst,
2186 bool did_rsc)
stephen hemmingerd3428942012-10-01 12:32:35 +00002187{
Paolo Abenid71785f2016-02-12 15:43:57 +01002188 struct dst_cache *dst_cache;
Thomas Graf3093fbe2015-07-21 10:44:00 +02002189 struct ip_tunnel_info *info;
stephen hemmingerd3428942012-10-01 12:32:35 +00002190 struct vxlan_dev *vxlan = netdev_priv(dev);
pravin shelar0770b532016-11-13 20:43:57 -08002191 const struct iphdr *old_iph = ip_hdr(skb);
Cong Wange4c7ed42013-08-31 13:44:33 +08002192 union vxlan_addr *dst;
pravin shelar272d96a2016-08-05 17:45:36 -07002193 union vxlan_addr remote_ip, local_ip;
Thomas Grafee122c72015-07-21 10:43:58 +02002194 struct vxlan_metadata _md;
2195 struct vxlan_metadata *md = &_md;
Cong Wange4c7ed42013-08-31 13:44:33 +08002196 __be16 src_port = 0, dst_port;
pravin shelar655c3de2016-11-13 20:43:55 -08002197 struct dst_entry *ndst = NULL;
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002198 __be32 vni, label;
stephen hemmingerd3428942012-10-01 12:32:35 +00002199 __u8 tos, ttl;
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002200 int ifindex;
Pravin B Shelar0e6fbc5b2013-06-17 17:49:56 -07002201 int err;
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002202 u32 flags = vxlan->cfg.flags;
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01002203 bool udp_sum = false;
Jiri Bencf491e562016-02-02 18:09:16 +01002204 bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
stephen hemmingerd3428942012-10-01 12:32:35 +00002205
Jiri Benc61adedf2015-08-20 13:56:25 +02002206 info = skb_tunnel_info(skb);
Thomas Graf3093fbe2015-07-21 10:44:00 +02002207
Thomas Grafee122c72015-07-21 10:43:58 +02002208 if (rdst) {
pravin shelar0770b532016-11-13 20:43:57 -08002209 dst = &rdst->remote_ip;
2210 if (vxlan_addr_any(dst)) {
2211 if (did_rsc) {
2212 /* short-circuited back to local bridge */
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002213 vxlan_encap_bypass(skb, vxlan, vxlan, default_vni);
pravin shelar0770b532016-11-13 20:43:57 -08002214 return;
2215 }
2216 goto drop;
2217 }
2218
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002219 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002220 vni = (rdst->remote_vni) ? : default_vni;
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002221 ifindex = rdst->remote_ifindex;
Brian Russell11586322017-02-24 17:47:11 +00002222 local_ip = vxlan->cfg.saddr;
Paolo Abenid71785f2016-02-12 15:43:57 +01002223 dst_cache = &rdst->dst_cache;
pravin shelar0770b532016-11-13 20:43:57 -08002224 md->gbp = skb->mark;
Hangbin Liu72f6d712018-04-17 14:11:28 +08002225 if (flags & VXLAN_F_TTL_INHERIT) {
2226 ttl = ip_tunnel_get_ttl(old_iph, skb);
2227 } else {
2228 ttl = vxlan->cfg.ttl;
2229 if (!ttl && vxlan_addr_multicast(dst))
2230 ttl = 1;
2231 }
pravin shelar0770b532016-11-13 20:43:57 -08002232
2233 tos = vxlan->cfg.tos;
2234 if (tos == 1)
2235 tos = ip_tunnel_get_dsfield(old_iph, skb);
2236
2237 if (dst->sa.sa_family == AF_INET)
2238 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
2239 else
2240 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
2241 label = vxlan->cfg.label;
Thomas Grafee122c72015-07-21 10:43:58 +02002242 } else {
2243 if (!info) {
2244 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
2245 dev->name);
2246 goto drop;
2247 }
Jiri Bencb1be00a2015-09-24 13:50:02 +02002248 remote_ip.sa.sa_family = ip_tunnel_info_af(info);
pravin shelar272d96a2016-08-05 17:45:36 -07002249 if (remote_ip.sa.sa_family == AF_INET) {
Jiri Benca725e512015-08-20 13:56:30 +02002250 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
pravin shelar272d96a2016-08-05 17:45:36 -07002251 local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src;
2252 } else {
Jiri Benca725e512015-08-20 13:56:30 +02002253 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
pravin shelar272d96a2016-08-05 17:45:36 -07002254 local_ip.sin6.sin6_addr = info->key.u.ipv6.src;
2255 }
Thomas Grafee122c72015-07-21 10:43:58 +02002256 dst = &remote_ip;
pravin shelar0770b532016-11-13 20:43:57 -08002257 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
2258 vni = tunnel_id_to_key32(info->key.tun_id);
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002259 ifindex = 0;
Paolo Abenid71785f2016-02-12 15:43:57 +01002260 dst_cache = &info->dst_cache;
Pieter Jansen van Vuuren256c87c2018-06-26 21:39:36 -07002261 if (info->options_len &&
2262 info->key.tun_flags & TUNNEL_VXLAN_OPT)
pravin shelar0770b532016-11-13 20:43:57 -08002263 md = ip_tunnel_info_opts(info);
Jiri Benca725e512015-08-20 13:56:30 +02002264 ttl = info->key.ttl;
2265 tos = info->key.tos;
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002266 label = info->key.label;
Jiri Bencb4ed5ca2016-02-02 18:09:15 +01002267 udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
Jiri Benca725e512015-08-20 13:56:30 +02002268 }
pravin shelar0770b532016-11-13 20:43:57 -08002269 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2270 vxlan->cfg.port_max, true);
Jiri Benca725e512015-08-20 13:56:30 +02002271
Jakub Kicinski56de8592017-02-24 11:43:36 -08002272 rcu_read_lock();
Cong Wange4c7ed42013-08-31 13:44:33 +08002273 if (dst->sa.sa_family == AF_INET) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002274 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
pravin shelarc46b7892016-11-13 20:43:54 -08002275 struct rtable *rt;
pravin shelar0770b532016-11-13 20:43:57 -08002276 __be16 df = 0;
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002277
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002278 rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos,
pravin shelar272d96a2016-08-05 17:45:36 -07002279 dst->sin.sin_addr.s_addr,
Brian Russell11586322017-02-24 17:47:11 +00002280 &local_ip.sin.sin_addr.s_addr,
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00002281 dst_port, src_port,
Paolo Abenid71785f2016-02-12 15:43:57 +01002282 dst_cache, info);
David S. Miller8ebd1152016-11-15 16:32:11 -05002283 if (IS_ERR(rt)) {
2284 err = PTR_ERR(rt);
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002285 goto tx_error;
David S. Miller8ebd1152016-11-15 16:32:11 -05002286 }
pravin shelarfee1fad2016-11-13 20:43:56 -08002287
pravin shelarfee1fad2016-11-13 20:43:56 -08002288 if (!info) {
Stefano Briviob4d306972018-11-08 12:19:16 +01002289 /* Bypass encapsulation if the destination is local */
pravin shelarfee1fad2016-11-13 20:43:56 -08002290 err = encap_bypass_if_local(skb, dev, vxlan, dst,
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002291 dst_port, ifindex, vni,
2292 &rt->dst, rt->rt_flags);
pravin shelarfee1fad2016-11-13 20:43:56 -08002293 if (err)
Jakub Kicinski56de8592017-02-24 11:43:36 -08002294 goto out_unlock;
Stefano Briviob4d306972018-11-08 12:19:16 +01002295
2296 if (vxlan->cfg.df == VXLAN_DF_SET) {
2297 df = htons(IP_DF);
2298 } else if (vxlan->cfg.df == VXLAN_DF_INHERIT) {
2299 struct ethhdr *eth = eth_hdr(skb);
2300
2301 if (ntohs(eth->h_proto) == ETH_P_IPV6 ||
2302 (ntohs(eth->h_proto) == ETH_P_IP &&
2303 old_iph->frag_off & htons(IP_DF)))
2304 df = htons(IP_DF);
2305 }
pravin shelarfee1fad2016-11-13 20:43:56 -08002306 } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) {
Alexander Duyck6ceb31c2016-02-19 11:26:31 -08002307 df = htons(IP_DF);
pravin shelarfee1fad2016-11-13 20:43:56 -08002308 }
Alexander Duyck6ceb31c2016-02-19 11:26:31 -08002309
pravin shelarc46b7892016-11-13 20:43:54 -08002310 ndst = &rt->dst;
Stefano Brivio6b4f92a2018-10-12 23:53:59 +02002311 skb_tunnel_check_pmtu(skb, ndst, VXLAN_HEADROOM);
Xin Longa93bf0f2017-12-18 14:20:56 +08002312
Cong Wange4c7ed42013-08-31 13:44:33 +08002313 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2314 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
pravin shelarc46b7892016-11-13 20:43:54 -08002315 err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr),
Jiri Benc54bfd872016-02-16 21:58:58 +01002316 vni, md, flags, udp_sum);
Jiri Bencf491e562016-02-02 18:09:16 +01002317 if (err < 0)
pravin shelarc46b7892016-11-13 20:43:54 -08002318 goto tx_error;
Jiri Bencf491e562016-02-02 18:09:16 +01002319
Brian Russell11586322017-02-24 17:47:11 +00002320 udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr,
Jiri Bencf491e562016-02-02 18:09:16 +01002321 dst->sin.sin_addr.s_addr, tos, ttl, df,
2322 src_port, dst_port, xnet, !udp_sum);
Cong Wange4c7ed42013-08-31 13:44:33 +08002323#if IS_ENABLED(CONFIG_IPV6)
2324 } else {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002325 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
Cong Wange4c7ed42013-08-31 13:44:33 +08002326
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002327 ndst = vxlan6_get_route(vxlan, dev, sock6, skb, ifindex, tos,
pravin shelar272d96a2016-08-05 17:45:36 -07002328 label, &dst->sin6.sin6_addr,
Brian Russell11586322017-02-24 17:47:11 +00002329 &local_ip.sin6.sin6_addr,
Martynas Pumputis4ecb1d82017-01-11 15:18:53 +00002330 dst_port, src_port,
Daniel Borkmanndb3c6132016-03-04 15:15:07 +01002331 dst_cache, info);
Jiri Bence5d4b292015-12-07 13:04:30 +01002332 if (IS_ERR(ndst)) {
David S. Miller8ebd1152016-11-15 16:32:11 -05002333 err = PTR_ERR(ndst);
pravin shelarc46b7892016-11-13 20:43:54 -08002334 ndst = NULL;
Cong Wange4c7ed42013-08-31 13:44:33 +08002335 goto tx_error;
2336 }
pravin shelar655c3de2016-11-13 20:43:55 -08002337
pravin shelarfee1fad2016-11-13 20:43:56 -08002338 if (!info) {
2339 u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
Cong Wange4c7ed42013-08-31 13:44:33 +08002340
pravin shelarfee1fad2016-11-13 20:43:56 -08002341 err = encap_bypass_if_local(skb, dev, vxlan, dst,
Matthias Schiffer49f810f2017-06-19 10:04:00 +02002342 dst_port, ifindex, vni,
2343 ndst, rt6i_flags);
pravin shelarfee1fad2016-11-13 20:43:56 -08002344 if (err)
Jakub Kicinski56de8592017-02-24 11:43:36 -08002345 goto out_unlock;
pravin shelarfee1fad2016-11-13 20:43:56 -08002346 }
Jesse Gross35e2d112016-01-20 16:22:47 -08002347
Stefano Brivio6b4f92a2018-10-12 23:53:59 +02002348 skb_tunnel_check_pmtu(skb, ndst, VXLAN6_HEADROOM);
Xin Longa93bf0f2017-12-18 14:20:56 +08002349
Daniel Borkmann14006152016-03-04 15:15:08 +01002350 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
Cong Wange4c7ed42013-08-31 13:44:33 +08002351 ttl = ttl ? : ip6_dst_hoplimit(ndst);
Jiri Bencf491e562016-02-02 18:09:16 +01002352 skb_scrub_packet(skb, xnet);
2353 err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
Jiri Benc54bfd872016-02-16 21:58:58 +01002354 vni, md, flags, udp_sum);
pravin shelarc46b7892016-11-13 20:43:54 -08002355 if (err < 0)
2356 goto tx_error;
2357
pravin shelar0770b532016-11-13 20:43:57 -08002358 udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev,
Brian Russell11586322017-02-24 17:47:11 +00002359 &local_ip.sin6.sin6_addr,
pravin shelar272d96a2016-08-05 17:45:36 -07002360 &dst->sin6.sin6_addr, tos, ttl,
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002361 label, src_port, dst_port, !udp_sum);
Cong Wange4c7ed42013-08-31 13:44:33 +08002362#endif
Sridhar Samudrala9dcc71e2013-04-02 12:31:52 +00002363 }
Jakub Kicinski56de8592017-02-24 11:43:36 -08002364out_unlock:
2365 rcu_read_unlock();
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002366 return;
stephen hemmingerd3428942012-10-01 12:32:35 +00002367
2368drop:
2369 dev->stats.tx_dropped++;
stephen hemmingerd3428942012-10-01 12:32:35 +00002370 dev_kfree_skb(skb);
pravin shelarc46b7892016-11-13 20:43:54 -08002371 return;
2372
2373tx_error:
Jakub Kicinski56de8592017-02-24 11:43:36 -08002374 rcu_read_unlock();
pravin shelar655c3de2016-11-13 20:43:55 -08002375 if (err == -ELOOP)
2376 dev->stats.collisions++;
2377 else if (err == -ENETUNREACH)
2378 dev->stats.tx_carrier_errors++;
pravin shelarc46b7892016-11-13 20:43:54 -08002379 dst_release(ndst);
2380 dev->stats.tx_errors++;
2381 kfree_skb(skb);
stephen hemmingerd3428942012-10-01 12:32:35 +00002382}
2383
David Stevens66817122013-03-15 04:35:51 +00002384/* Transmit local packets over Vxlan
2385 *
2386 * Outer IP header inherits ECN and DF from inner header.
2387 * Outer UDP destination is the VXLAN assigned port.
2388 * source port is based on hash of flow
2389 */
2390static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2391{
2392 struct vxlan_dev *vxlan = netdev_priv(dev);
Eric Dumazet8f646c92014-01-06 09:54:31 -08002393 struct vxlan_rdst *rdst, *fdst = NULL;
Xin Long8bff36852017-11-11 19:58:50 +08002394 const struct ip_tunnel_info *info;
2395 bool did_rsc = false;
David Stevens66817122013-03-15 04:35:51 +00002396 struct vxlan_fdb *f;
Xin Long8bff36852017-11-11 19:58:50 +08002397 struct ethhdr *eth;
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002398 __be32 vni = 0;
David Stevens66817122013-03-15 04:35:51 +00002399
Jiri Benc61adedf2015-08-20 13:56:25 +02002400 info = skb_tunnel_info(skb);
Thomas Graf3093fbe2015-07-21 10:44:00 +02002401
David Stevens66817122013-03-15 04:35:51 +00002402 skb_reset_mac_header(skb);
David Stevens66817122013-03-15 04:35:51 +00002403
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002404 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002405 if (info && info->mode & IP_TUNNEL_INFO_BRIDGE &&
2406 info->mode & IP_TUNNEL_INFO_TX) {
2407 vni = tunnel_id_to_key32(info->key.tun_id);
2408 } else {
2409 if (info && info->mode & IP_TUNNEL_INFO_TX)
2410 vxlan_xmit_one(skb, dev, vni, NULL, false);
2411 else
2412 kfree_skb(skb);
2413 return NETDEV_TX_OK;
2414 }
Jiri Benc47e5d1b2016-04-05 14:47:11 +02002415 }
2416
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002417 if (vxlan->cfg.flags & VXLAN_F_PROXY) {
Jiri Benc47e5d1b2016-04-05 14:47:11 +02002418 eth = eth_hdr(skb);
Cong Wangf564f452013-08-31 13:44:36 +08002419 if (ntohs(eth->h_proto) == ETH_P_ARP)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002420 return arp_reduce(dev, skb, vni);
Cong Wangf564f452013-08-31 13:44:36 +08002421#if IS_ENABLED(CONFIG_IPV6)
Xin Long8bff36852017-11-11 19:58:50 +08002422 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
2423 pskb_may_pull(skb, sizeof(struct ipv6hdr) +
2424 sizeof(struct nd_msg)) &&
2425 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2426 struct nd_msg *m = (struct nd_msg *)(ipv6_hdr(skb) + 1);
2427
2428 if (m->icmph.icmp6_code == 0 &&
2429 m->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
Vincent Bernatf1fb08f2017-04-02 11:00:06 +02002430 return neigh_reduce(dev, skb, vni);
Cong Wangf564f452013-08-31 13:44:36 +08002431 }
2432#endif
2433 }
David Stevens66817122013-03-15 04:35:51 +00002434
Jiri Benc47e5d1b2016-04-05 14:47:11 +02002435 eth = eth_hdr(skb);
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002436 f = vxlan_find_mac(vxlan, eth->h_dest, vni);
David Stevensae884082013-04-19 00:36:26 +00002437 did_rsc = false;
2438
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002439 if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) &&
Cong Wange15a00a2013-08-31 13:44:34 +08002440 (ntohs(eth->h_proto) == ETH_P_IP ||
2441 ntohs(eth->h_proto) == ETH_P_IPV6)) {
David Stevensae884082013-04-19 00:36:26 +00002442 did_rsc = route_shortcircuit(dev, skb);
2443 if (did_rsc)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002444 f = vxlan_find_mac(vxlan, eth->h_dest, vni);
David Stevensae884082013-04-19 00:36:26 +00002445 }
2446
David Stevens66817122013-03-15 04:35:51 +00002447 if (f == NULL) {
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002448 f = vxlan_find_mac(vxlan, all_zeros_mac, vni);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002449 if (f == NULL) {
Matthias Schifferdc5321d2017-06-19 10:03:56 +02002450 if ((vxlan->cfg.flags & VXLAN_F_L2MISS) &&
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002451 !is_multicast_ether_addr(eth->h_dest))
2452 vxlan_fdb_miss(vxlan, eth->h_dest);
David Stevens66817122013-03-15 04:35:51 +00002453
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002454 dev->stats.tx_dropped++;
Eric Dumazet8f646c92014-01-06 09:54:31 -08002455 kfree_skb(skb);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002456 return NETDEV_TX_OK;
Stephen Hemminger3e61aa82013-06-17 14:16:12 -07002457 }
David Stevens66817122013-03-15 04:35:51 +00002458 }
2459
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002460 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2461 struct sk_buff *skb1;
2462
Eric Dumazet8f646c92014-01-06 09:54:31 -08002463 if (!fdst) {
2464 fdst = rdst;
2465 continue;
2466 }
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002467 skb1 = skb_clone(skb, GFP_ATOMIC);
2468 if (skb1)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002469 vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002470 }
2471
Eric Dumazet8f646c92014-01-06 09:54:31 -08002472 if (fdst)
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002473 vxlan_xmit_one(skb, dev, vni, fdst, did_rsc);
Eric Dumazet8f646c92014-01-06 09:54:31 -08002474 else
2475 kfree_skb(skb);
Stephen Hemminger4ad16932013-06-17 14:16:11 -07002476 return NETDEV_TX_OK;
David Stevens66817122013-03-15 04:35:51 +00002477}
2478
stephen hemmingerd3428942012-10-01 12:32:35 +00002479/* Walk the forwarding table and purge stale entries */
Kees Cookdf7e8282017-10-04 16:26:59 -07002480static void vxlan_cleanup(struct timer_list *t)
stephen hemmingerd3428942012-10-01 12:32:35 +00002481{
Kees Cookdf7e8282017-10-04 16:26:59 -07002482 struct vxlan_dev *vxlan = from_timer(vxlan, t, age_timer);
stephen hemmingerd3428942012-10-01 12:32:35 +00002483 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2484 unsigned int h;
2485
2486 if (!netif_running(vxlan->dev))
2487 return;
2488
stephen hemmingerd3428942012-10-01 12:32:35 +00002489 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2490 struct hlist_node *p, *n;
Sorin Dumitru14e1d0f2015-05-26 10:42:04 +03002491
2492 spin_lock_bh(&vxlan->hash_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00002493 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2494 struct vxlan_fdb *f
2495 = container_of(p, struct vxlan_fdb, hlist);
2496 unsigned long timeout;
2497
Balakrishnan Ramanefb5f682017-01-23 20:44:33 -08002498 if (f->state & (NUD_PERMANENT | NUD_NOARP))
stephen hemmingerd3428942012-10-01 12:32:35 +00002499 continue;
2500
Roopa Prabhudef499c2017-03-27 15:46:41 -07002501 if (f->flags & NTF_EXT_LEARNED)
2502 continue;
2503
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002504 timeout = f->used + vxlan->cfg.age_interval * HZ;
stephen hemmingerd3428942012-10-01 12:32:35 +00002505 if (time_before_eq(timeout, jiffies)) {
2506 netdev_dbg(vxlan->dev,
2507 "garbage collect %pM\n",
2508 f->eth_addr);
2509 f->state = NUD_STALE;
Petr Machata0e6160f2018-11-21 08:02:35 +00002510 vxlan_fdb_destroy(vxlan, f, true, true);
stephen hemmingerd3428942012-10-01 12:32:35 +00002511 } else if (time_before(timeout, next_timer))
2512 next_timer = timeout;
2513 }
Sorin Dumitru14e1d0f2015-05-26 10:42:04 +03002514 spin_unlock_bh(&vxlan->hash_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00002515 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002516
2517 mod_timer(&vxlan->age_timer, next_timer);
2518}
2519
Mark Blocha53cb292017-06-02 03:24:08 +03002520static void vxlan_vs_del_dev(struct vxlan_dev *vxlan)
2521{
2522 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2523
2524 spin_lock(&vn->sock_lock);
Jiri Benc69e76662017-07-02 19:00:57 +02002525 hlist_del_init_rcu(&vxlan->hlist4.hlist);
2526#if IS_ENABLED(CONFIG_IPV6)
2527 hlist_del_init_rcu(&vxlan->hlist6.hlist);
2528#endif
Mark Blocha53cb292017-06-02 03:24:08 +03002529 spin_unlock(&vn->sock_lock);
2530}
2531
Jiri Benc69e76662017-07-02 19:00:57 +02002532static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan,
2533 struct vxlan_dev_node *node)
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002534{
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002535 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Jiri Benc54bfd872016-02-16 21:58:58 +01002536 __be32 vni = vxlan->default_dst.remote_vni;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002537
Jiri Benc69e76662017-07-02 19:00:57 +02002538 node->vxlan = vxlan;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002539 spin_lock(&vn->sock_lock);
Jiri Benc69e76662017-07-02 19:00:57 +02002540 hlist_add_head_rcu(&node->hlist, vni_head(vs, vni));
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002541 spin_unlock(&vn->sock_lock);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002542}
2543
stephen hemmingerd3428942012-10-01 12:32:35 +00002544/* Setup stats when device is created */
2545static int vxlan_init(struct net_device *dev)
2546{
WANG Cong1c213bd2014-02-13 11:46:28 -08002547 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
Pravin B Shelare8171042013-03-25 14:49:46 +00002548 if (!dev->tstats)
stephen hemmingerd3428942012-10-01 12:32:35 +00002549 return -ENOMEM;
2550
2551 return 0;
2552}
2553
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002554static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni)
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002555{
2556 struct vxlan_fdb *f;
2557
2558 spin_lock_bh(&vxlan->hash_lock);
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002559 f = __vxlan_find_mac(vxlan, all_zeros_mac, vni);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002560 if (f)
Petr Machata0e6160f2018-11-21 08:02:35 +00002561 vxlan_fdb_destroy(vxlan, f, true, true);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002562 spin_unlock_bh(&vxlan->hash_lock);
2563}
2564
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002565static void vxlan_uninit(struct net_device *dev)
2566{
2567 struct vxlan_dev *vxlan = netdev_priv(dev);
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002568
Roopa Prabhu3ad7a4b2017-01-31 22:59:52 -08002569 vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni);
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002570
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002571 free_percpu(dev->tstats);
2572}
2573
stephen hemmingerd3428942012-10-01 12:32:35 +00002574/* Start ageing timer and join group when device is brought up */
2575static int vxlan_open(struct net_device *dev)
2576{
2577 struct vxlan_dev *vxlan = netdev_priv(dev);
Jiri Benc205f3562015-09-24 13:50:01 +02002578 int ret;
Stephen Hemminger1c51a912013-06-17 14:16:11 -07002579
Jiri Benc205f3562015-09-24 13:50:01 +02002580 ret = vxlan_sock_add(vxlan);
2581 if (ret < 0)
2582 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002583
Gao feng79d4a942013-12-10 16:37:32 +08002584 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002585 ret = vxlan_igmp_join(vxlan);
Marcelo Ricardo Leitnerbef00572015-08-25 20:22:35 -03002586 if (ret == -EADDRINUSE)
2587 ret = 0;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002588 if (ret) {
Jiri Benc205f3562015-09-24 13:50:01 +02002589 vxlan_sock_release(vxlan);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002590 return ret;
2591 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002592 }
2593
Thomas Graf0dfbdf42015-07-21 10:44:02 +02002594 if (vxlan->cfg.age_interval)
stephen hemmingerd3428942012-10-01 12:32:35 +00002595 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2596
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002597 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002598}
2599
2600/* Purge the forwarding table */
Roopa Prabhu8b3f9332017-01-23 20:44:32 -08002601static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all)
stephen hemmingerd3428942012-10-01 12:32:35 +00002602{
Cong Wang31fec5a2013-05-27 22:35:52 +00002603 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002604
2605 spin_lock_bh(&vxlan->hash_lock);
2606 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2607 struct hlist_node *p, *n;
2608 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2609 struct vxlan_fdb *f
2610 = container_of(p, struct vxlan_fdb, hlist);
Roopa Prabhu8b3f9332017-01-23 20:44:32 -08002611 if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP)))
2612 continue;
Mike Rapoportafbd8ba2013-06-25 16:01:51 +03002613 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2614 if (!is_zero_ether_addr(f->eth_addr))
Petr Machata0e6160f2018-11-21 08:02:35 +00002615 vxlan_fdb_destroy(vxlan, f, true, true);
stephen hemmingerd3428942012-10-01 12:32:35 +00002616 }
2617 }
2618 spin_unlock_bh(&vxlan->hash_lock);
2619}
2620
2621/* Cleanup timer and forwarding table on shutdown */
2622static int vxlan_stop(struct net_device *dev)
2623{
2624 struct vxlan_dev *vxlan = netdev_priv(dev);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02002625 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002626 int ret = 0;
stephen hemmingerd3428942012-10-01 12:32:35 +00002627
Marcelo Ricardo Leitner24c0e682015-03-23 16:23:12 -03002628 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
WANG Congf13b1682015-04-08 14:48:30 -07002629 !vxlan_group_used(vn, vxlan))
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002630 ret = vxlan_igmp_leave(vxlan);
stephen hemmingerd3428942012-10-01 12:32:35 +00002631
2632 del_timer_sync(&vxlan->age_timer);
2633
Roopa Prabhu8b3f9332017-01-23 20:44:32 -08002634 vxlan_flush(vxlan, false);
Jiri Benc205f3562015-09-24 13:50:01 +02002635 vxlan_sock_release(vxlan);
stephen hemmingerd3428942012-10-01 12:32:35 +00002636
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03002637 return ret;
stephen hemmingerd3428942012-10-01 12:32:35 +00002638}
2639
stephen hemmingerd3428942012-10-01 12:32:35 +00002640/* Stub, nothing needs to be done. */
2641static void vxlan_set_multicast_list(struct net_device *dev)
2642{
2643}
2644
Daniel Borkmann345010b2013-12-18 00:21:08 +01002645static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2646{
2647 struct vxlan_dev *vxlan = netdev_priv(dev);
2648 struct vxlan_rdst *dst = &vxlan->default_dst;
David Wragg72564b52016-02-10 00:05:55 +00002649 struct net_device *lowerdev = __dev_get_by_index(vxlan->net,
2650 dst->remote_ifindex);
Matthias Schifferce44a4a2017-06-19 10:03:57 +02002651 bool use_ipv6 = !!(vxlan->cfg.flags & VXLAN_F_IPV6);
Jarod Wilson91572082016-10-20 13:55:20 -04002652
2653 /* This check is different than dev->max_mtu, because it looks at
2654 * the lowerdev->mtu, rather than the static dev->max_mtu
2655 */
2656 if (lowerdev) {
2657 int max_mtu = lowerdev->mtu -
2658 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
2659 if (new_mtu > max_mtu)
2660 return -EINVAL;
2661 }
2662
2663 dev->mtu = new_mtu;
2664 return 0;
Daniel Borkmann345010b2013-12-18 00:21:08 +01002665}
2666
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07002667static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
2668{
2669 struct vxlan_dev *vxlan = netdev_priv(dev);
2670 struct ip_tunnel_info *info = skb_tunnel_info(skb);
2671 __be16 sport, dport;
2672
2673 sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2674 vxlan->cfg.port_max, true);
2675 dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
2676
Jiri Benc239e9442015-12-07 13:04:31 +01002677 if (ip_tunnel_info_af(info) == AF_INET) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07002678 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
Jiri Benc1a8496b2016-02-02 18:09:14 +01002679 struct rtable *rt;
2680
pravin shelar655c3de2016-11-13 20:43:55 -08002681 rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos,
Jiri Benc1a8496b2016-02-02 18:09:14 +01002682 info->key.u.ipv4.dst,
Paolo Abeni22f07082017-02-17 19:14:27 +01002683 &info->key.u.ipv4.src, dport, sport,
2684 &info->dst_cache, info);
Jiri Benc1a8496b2016-02-02 18:09:14 +01002685 if (IS_ERR(rt))
2686 return PTR_ERR(rt);
2687 ip_rt_put(rt);
Jiri Benc239e9442015-12-07 13:04:31 +01002688 } else {
2689#if IS_ENABLED(CONFIG_IPV6)
pravin shelar03dc52a2016-11-13 20:43:53 -08002690 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
Jiri Benc239e9442015-12-07 13:04:31 +01002691 struct dst_entry *ndst;
2692
pravin shelar655c3de2016-11-13 20:43:55 -08002693 ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos,
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002694 info->key.label, &info->key.u.ipv6.dst,
Paolo Abeni22f07082017-02-17 19:14:27 +01002695 &info->key.u.ipv6.src, dport, sport,
2696 &info->dst_cache, info);
Jiri Benc239e9442015-12-07 13:04:31 +01002697 if (IS_ERR(ndst))
2698 return PTR_ERR(ndst);
2699 dst_release(ndst);
Jiri Benc239e9442015-12-07 13:04:31 +01002700#else /* !CONFIG_IPV6 */
2701 return -EPFNOSUPPORT;
2702#endif
2703 }
Jiri Benc1a8496b2016-02-02 18:09:14 +01002704 info->key.tp_src = sport;
2705 info->key.tp_dst = dport;
Jiri Benc239e9442015-12-07 13:04:31 +01002706 return 0;
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07002707}
2708
Jiri Benc0c867c92016-04-05 14:47:10 +02002709static const struct net_device_ops vxlan_netdev_ether_ops = {
stephen hemmingerd3428942012-10-01 12:32:35 +00002710 .ndo_init = vxlan_init,
Stephen Hemmingerebf40632013-06-17 14:16:11 -07002711 .ndo_uninit = vxlan_uninit,
stephen hemmingerd3428942012-10-01 12:32:35 +00002712 .ndo_open = vxlan_open,
2713 .ndo_stop = vxlan_stop,
2714 .ndo_start_xmit = vxlan_xmit,
Pravin B Shelare8171042013-03-25 14:49:46 +00002715 .ndo_get_stats64 = ip_tunnel_get_stats64,
stephen hemmingerd3428942012-10-01 12:32:35 +00002716 .ndo_set_rx_mode = vxlan_set_multicast_list,
Daniel Borkmann345010b2013-12-18 00:21:08 +01002717 .ndo_change_mtu = vxlan_change_mtu,
stephen hemmingerd3428942012-10-01 12:32:35 +00002718 .ndo_validate_addr = eth_validate_addr,
2719 .ndo_set_mac_address = eth_mac_addr,
2720 .ndo_fdb_add = vxlan_fdb_add,
2721 .ndo_fdb_del = vxlan_fdb_delete,
2722 .ndo_fdb_dump = vxlan_fdb_dump,
Pravin B Shelarfc4099f2015-10-22 18:17:16 -07002723 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
stephen hemmingerd3428942012-10-01 12:32:35 +00002724};
2725
Jiri Bence1e53142016-04-05 14:47:13 +02002726static const struct net_device_ops vxlan_netdev_raw_ops = {
2727 .ndo_init = vxlan_init,
2728 .ndo_uninit = vxlan_uninit,
2729 .ndo_open = vxlan_open,
2730 .ndo_stop = vxlan_stop,
2731 .ndo_start_xmit = vxlan_xmit,
2732 .ndo_get_stats64 = ip_tunnel_get_stats64,
2733 .ndo_change_mtu = vxlan_change_mtu,
2734 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
2735};
2736
stephen hemmingerd3428942012-10-01 12:32:35 +00002737/* Info for udev, that this is a virtual tunnel endpoint */
2738static struct device_type vxlan_type = {
2739 .name = "vxlan",
2740};
2741
Sabrina Dubrocae5de25d2016-07-11 13:12:28 +02002742/* Calls the ndo_udp_tunnel_add of the caller in order to
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002743 * supply the listening VXLAN udp ports. Callers are expected
Sabrina Dubrocae5de25d2016-07-11 13:12:28 +02002744 * to implement the ndo_udp_tunnel_add.
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002745 */
Sabrina Dubroca2d2b13f2017-07-21 12:49:32 +02002746static void vxlan_offload_rx_ports(struct net_device *dev, bool push)
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002747{
2748 struct vxlan_sock *vs;
2749 struct net *net = dev_net(dev);
2750 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Joseph Gasparakis35e42372013-09-13 07:34:13 -07002751 unsigned int i;
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002752
2753 spin_lock(&vn->sock_lock);
2754 for (i = 0; i < PORT_HASH_SIZE; ++i) {
Sabrina Dubroca2d2b13f2017-07-21 12:49:32 +02002755 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2756 unsigned short type;
2757
2758 if (vs->flags & VXLAN_F_GPE)
2759 type = UDP_TUNNEL_TYPE_VXLAN_GPE;
2760 else
2761 type = UDP_TUNNEL_TYPE_VXLAN;
2762
2763 if (push)
2764 udp_tunnel_push_rx_port(dev, vs->sock, type);
2765 else
2766 udp_tunnel_drop_rx_port(dev, vs->sock, type);
2767 }
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002768 }
2769 spin_unlock(&vn->sock_lock);
2770}
Joseph Gasparakis53cf52752013-09-04 02:13:38 -07002771
stephen hemmingerd3428942012-10-01 12:32:35 +00002772/* Initialize the device structure. */
2773static void vxlan_setup(struct net_device *dev)
2774{
2775 struct vxlan_dev *vxlan = netdev_priv(dev);
Cong Wang31fec5a2013-05-27 22:35:52 +00002776 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00002777
Jiri Benc65226ef2016-04-28 16:36:30 +02002778 eth_hw_addr_random(dev);
2779 ether_setup(dev);
2780
David S. Millercf124db2017-05-08 12:52:56 -04002781 dev->needs_free_netdev = true;
stephen hemmingerd3428942012-10-01 12:32:35 +00002782 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2783
stephen hemmingerd3428942012-10-01 12:32:35 +00002784 dev->features |= NETIF_F_LLTX;
Joseph Gasparakisd6727fe2012-12-07 14:14:16 +00002785 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002786 dev->features |= NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002787 dev->features |= NETIF_F_GSO_SOFTWARE;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002788
Pravin B Shelar1eaa8172013-08-19 11:23:29 -07002789 dev->vlan_features = dev->features;
Joseph Gasparakis0afb1662012-12-07 14:14:18 +00002790 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
Pravin B Shelar05c0db02013-03-07 13:22:36 +00002791 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
Eric Dumazet02875872014-10-05 18:38:35 -07002792 netif_keep_dst(dev);
Jiri Benc0c867c92016-04-05 14:47:10 +02002793 dev->priv_flags |= IFF_NO_QUEUE;
stephen hemmingerd3428942012-10-01 12:32:35 +00002794
Matthias Schiffera9853432017-06-19 10:03:55 +02002795 /* MTU range: 68 - 65535 */
2796 dev->min_mtu = ETH_MIN_MTU;
2797 dev->max_mtu = ETH_MAX_MTU;
2798
stephen hemminger553675f2013-05-16 11:35:20 +00002799 INIT_LIST_HEAD(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00002800 spin_lock_init(&vxlan->hash_lock);
2801
Kees Cookdf7e8282017-10-04 16:26:59 -07002802 timer_setup(&vxlan->age_timer, vxlan_cleanup, TIMER_DEFERRABLE);
stephen hemmingerd3428942012-10-01 12:32:35 +00002803
2804 vxlan->dev = dev;
2805
Tom Herbert58ce31c2015-08-19 17:07:33 -07002806 gro_cells_init(&vxlan->gro_cells, dev);
2807
stephen hemmingerd3428942012-10-01 12:32:35 +00002808 for (h = 0; h < FDB_HASH_SIZE; ++h)
2809 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2810}
2811
Jiri Benc0c867c92016-04-05 14:47:10 +02002812static void vxlan_ether_setup(struct net_device *dev)
2813{
Jiri Benc0c867c92016-04-05 14:47:10 +02002814 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
2815 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2816 dev->netdev_ops = &vxlan_netdev_ether_ops;
2817}
2818
Jiri Bence1e53142016-04-05 14:47:13 +02002819static void vxlan_raw_setup(struct net_device *dev)
2820{
Jiri Benc65226ef2016-04-28 16:36:30 +02002821 dev->header_ops = NULL;
Jiri Bence1e53142016-04-05 14:47:13 +02002822 dev->type = ARPHRD_NONE;
2823 dev->hard_header_len = 0;
2824 dev->addr_len = 0;
Jiri Bence1e53142016-04-05 14:47:13 +02002825 dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2826 dev->netdev_ops = &vxlan_netdev_raw_ops;
2827}
2828
stephen hemmingerd3428942012-10-01 12:32:35 +00002829static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2830 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
stephen hemminger5d174dd2013-04-27 11:31:55 +00002831 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002832 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002833 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2834 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
Cong Wange4c7ed42013-08-31 13:44:33 +08002835 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
stephen hemmingerd3428942012-10-01 12:32:35 +00002836 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2837 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01002838 [IFLA_VXLAN_LABEL] = { .type = NLA_U32 },
stephen hemmingerd3428942012-10-01 12:32:35 +00002839 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2840 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2841 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
stephen hemminger05f47d62012-10-09 20:35:50 +00002842 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
David Stevense4f67ad2012-11-20 02:50:14 +00002843 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2844 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2845 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2846 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
Alexei Starovoitovf8a9b1b2015-07-30 20:10:22 -07002847 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
stephen hemminger823aa872013-04-27 11:31:57 +00002848 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
Tom Herbert5c91ae02014-11-06 18:06:01 -08002849 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2850 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2851 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
Tom Herbertdfd86452015-01-12 17:00:38 -08002852 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2853 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
Thomas Graf35114942015-01-15 03:53:55 +01002854 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
Jiri Bence1e53142016-04-05 14:47:13 +02002855 [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, },
Tom Herbert0ace2ca2015-02-10 16:30:32 -08002856 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
Hangbin Liu72f6d712018-04-17 14:11:28 +08002857 [IFLA_VXLAN_TTL_INHERIT] = { .type = NLA_FLAG },
Stefano Briviob4d306972018-11-08 12:19:16 +01002858 [IFLA_VXLAN_DF] = { .type = NLA_U8 },
stephen hemmingerd3428942012-10-01 12:32:35 +00002859};
2860
Matthias Schiffera8b8a8892017-06-25 23:56:01 +02002861static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[],
2862 struct netlink_ext_ack *extack)
stephen hemmingerd3428942012-10-01 12:32:35 +00002863{
2864 if (tb[IFLA_ADDRESS]) {
2865 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002866 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
2867 "Provided link layer address is not Ethernet");
stephen hemmingerd3428942012-10-01 12:32:35 +00002868 return -EINVAL;
2869 }
2870
2871 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002872 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
2873 "Provided Ethernet address is not unicast");
stephen hemmingerd3428942012-10-01 12:32:35 +00002874 return -EADDRNOTAVAIL;
2875 }
2876 }
2877
Matthias Schiffera9853432017-06-19 10:03:55 +02002878 if (tb[IFLA_MTU]) {
Matthias Schiffer019b13a2017-06-27 14:42:43 +02002879 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
Matthias Schiffera9853432017-06-19 10:03:55 +02002880
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002881 if (mtu < ETH_MIN_MTU || mtu > ETH_MAX_MTU) {
2882 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_MTU],
2883 "MTU must be between 68 and 65535");
Matthias Schiffera9853432017-06-19 10:03:55 +02002884 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002885 }
Matthias Schiffera9853432017-06-19 10:03:55 +02002886 }
2887
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002888 if (!data) {
2889 NL_SET_ERR_MSG(extack,
2890 "Required attributes not provided to perform the operation");
stephen hemmingerd3428942012-10-01 12:32:35 +00002891 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002892 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002893
2894 if (data[IFLA_VXLAN_ID]) {
Matthias Schiffera9853432017-06-19 10:03:55 +02002895 u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2896
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002897 if (id >= VXLAN_N_VID) {
2898 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_ID],
2899 "VXLAN ID must be lower than 16777216");
stephen hemmingerd3428942012-10-01 12:32:35 +00002900 return -ERANGE;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002901 }
stephen hemmingerd3428942012-10-01 12:32:35 +00002902 }
2903
stephen hemminger05f47d62012-10-09 20:35:50 +00002904 if (data[IFLA_VXLAN_PORT_RANGE]) {
2905 const struct ifla_vxlan_port_range *p
2906 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2907
2908 if (ntohs(p->high) < ntohs(p->low)) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07002909 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT_RANGE],
2910 "Invalid source port range");
stephen hemminger05f47d62012-10-09 20:35:50 +00002911 return -EINVAL;
2912 }
2913 }
2914
Stefano Briviob4d306972018-11-08 12:19:16 +01002915 if (data[IFLA_VXLAN_DF]) {
2916 enum ifla_vxlan_df df = nla_get_u8(data[IFLA_VXLAN_DF]);
2917
2918 if (df < 0 || df > VXLAN_DF_MAX) {
2919 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_DF],
2920 "Invalid DF attribute");
2921 return -EINVAL;
2922 }
2923 }
2924
stephen hemmingerd3428942012-10-01 12:32:35 +00002925 return 0;
2926}
2927
Yan Burman1b13c972013-01-29 23:43:07 +00002928static void vxlan_get_drvinfo(struct net_device *netdev,
2929 struct ethtool_drvinfo *drvinfo)
2930{
2931 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2932 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2933}
2934
2935static const struct ethtool_ops vxlan_ethtool_ops = {
2936 .get_drvinfo = vxlan_get_drvinfo,
2937 .get_link = ethtool_op_get_link,
2938};
2939
Tom Herbert3ee64f32014-07-13 19:49:42 -07002940static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2941 __be16 port, u32 flags)
stephen hemminger553675f2013-05-16 11:35:20 +00002942{
Cong Wange4c7ed42013-08-31 13:44:33 +08002943 struct socket *sock;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002944 struct udp_port_cfg udp_conf;
2945 int err;
Cong Wange4c7ed42013-08-31 13:44:33 +08002946
Tom Herbert3ee64f32014-07-13 19:49:42 -07002947 memset(&udp_conf, 0, sizeof(udp_conf));
2948
2949 if (ipv6) {
2950 udp_conf.family = AF_INET6;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002951 udp_conf.use_udp6_rx_checksums =
Alexander Duyck3dc2b6a2014-11-24 20:08:38 -08002952 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
Jiri Benca43a9ef2015-08-28 20:48:22 +02002953 udp_conf.ipv6_v6only = 1;
Tom Herbert3ee64f32014-07-13 19:49:42 -07002954 } else {
2955 udp_conf.family = AF_INET;
Cong Wange4c7ed42013-08-31 13:44:33 +08002956 }
2957
Tom Herbert3ee64f32014-07-13 19:49:42 -07002958 udp_conf.local_udp_port = port;
Cong Wange4c7ed42013-08-31 13:44:33 +08002959
Tom Herbert3ee64f32014-07-13 19:49:42 -07002960 /* Open UDP socket */
2961 err = udp_sock_create(net, &udp_conf, &sock);
2962 if (err < 0)
2963 return ERR_PTR(err);
Cong Wange4c7ed42013-08-31 13:44:33 +08002964
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002965 return sock;
Cong Wange4c7ed42013-08-31 13:44:33 +08002966}
2967
2968/* Create new listen socket if needed */
Jiri Bencb1be00a2015-09-24 13:50:02 +02002969static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
2970 __be16 port, u32 flags)
Cong Wange4c7ed42013-08-31 13:44:33 +08002971{
2972 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2973 struct vxlan_sock *vs;
2974 struct socket *sock;
Cong Wang31fec5a2013-05-27 22:35:52 +00002975 unsigned int h;
Andy Zhouacbf74a2014-09-16 17:31:18 -07002976 struct udp_tunnel_sock_cfg tunnel_cfg;
stephen hemminger553675f2013-05-16 11:35:20 +00002977
Or Gerlitzdc01e7d2014-01-20 13:59:21 +02002978 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
Cong Wange4c7ed42013-08-31 13:44:33 +08002979 if (!vs)
stephen hemminger553675f2013-05-16 11:35:20 +00002980 return ERR_PTR(-ENOMEM);
2981
2982 for (h = 0; h < VNI_HASH_SIZE; ++h)
2983 INIT_HLIST_HEAD(&vs->vni_list[h]);
2984
Tom Herbert3ee64f32014-07-13 19:49:42 -07002985 sock = vxlan_create_sock(net, ipv6, port, flags);
Zhi Yong Wu39deb2c2013-10-28 14:01:48 +08002986 if (IS_ERR(sock)) {
stephen hemminger553675f2013-05-16 11:35:20 +00002987 kfree(vs);
Duan Jionge50fddc2013-11-01 13:09:43 +08002988 return ERR_CAST(sock);
stephen hemminger553675f2013-05-16 11:35:20 +00002989 }
2990
Cong Wange4c7ed42013-08-31 13:44:33 +08002991 vs->sock = sock;
Reshetova, Elena66af8462017-07-04 15:52:59 +03002992 refcount_set(&vs->refcnt, 1);
Tom Herbertaf33c1a2015-01-20 11:23:05 -08002993 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
stephen hemminger553675f2013-05-16 11:35:20 +00002994
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07002995 spin_lock(&vn->sock_lock);
2996 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
Alexander Duycke7b3db52016-06-16 12:20:52 -07002997 udp_tunnel_notify_add_rx_port(sock,
Alexander Duyckb9adcd692016-06-16 12:23:19 -07002998 (vs->flags & VXLAN_F_GPE) ?
2999 UDP_TUNNEL_TYPE_VXLAN_GPE :
Alexander Duycke7b3db52016-06-16 12:20:52 -07003000 UDP_TUNNEL_TYPE_VXLAN);
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07003001 spin_unlock(&vn->sock_lock);
stephen hemminger553675f2013-05-16 11:35:20 +00003002
3003 /* Mark socket as an encapsulation socket. */
Tom Herbert5602c482016-04-05 08:22:53 -07003004 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
Andy Zhouacbf74a2014-09-16 17:31:18 -07003005 tunnel_cfg.sk_user_data = vs;
3006 tunnel_cfg.encap_type = 1;
Jiri Bencf2d1968ec2016-02-23 18:02:58 +01003007 tunnel_cfg.encap_rcv = vxlan_rcv;
Stefano Brivioc3a43b92018-11-08 12:19:15 +01003008 tunnel_cfg.encap_err_lookup = vxlan_err_lookup;
Andy Zhouacbf74a2014-09-16 17:31:18 -07003009 tunnel_cfg.encap_destroy = NULL;
Tom Herbert5602c482016-04-05 08:22:53 -07003010 tunnel_cfg.gro_receive = vxlan_gro_receive;
3011 tunnel_cfg.gro_complete = vxlan_gro_complete;
Andy Zhouacbf74a2014-09-16 17:31:18 -07003012
3013 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
Cong Wange4c7ed42013-08-31 13:44:33 +08003014
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07003015 return vs;
3016}
stephen hemminger553675f2013-05-16 11:35:20 +00003017
Jiri Bencb1be00a2015-09-24 13:50:02 +02003018static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6)
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07003019{
Jiri Benc205f3562015-09-24 13:50:01 +02003020 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
3021 struct vxlan_sock *vs = NULL;
Jiri Benc69e76662017-07-02 19:00:57 +02003022 struct vxlan_dev_node *node;
Pravin B Shelar9c2e24e2013-08-19 11:22:48 -07003023
Jiri Benc205f3562015-09-24 13:50:01 +02003024 if (!vxlan->cfg.no_share) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03003025 spin_lock(&vn->sock_lock);
Jiri Benc205f3562015-09-24 13:50:01 +02003026 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003027 vxlan->cfg.dst_port, vxlan->cfg.flags);
Reshetova, Elena66af8462017-07-04 15:52:59 +03003028 if (vs && !refcount_inc_not_zero(&vs->refcnt)) {
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03003029 spin_unlock(&vn->sock_lock);
Jiri Benc205f3562015-09-24 13:50:01 +02003030 return -EBUSY;
Marcelo Ricardo Leitner56ef9c92015-03-18 14:50:44 -03003031 }
3032 spin_unlock(&vn->sock_lock);
3033 }
Jiri Benc205f3562015-09-24 13:50:01 +02003034 if (!vs)
Jiri Bencb1be00a2015-09-24 13:50:02 +02003035 vs = vxlan_socket_create(vxlan->net, ipv6,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003036 vxlan->cfg.dst_port, vxlan->cfg.flags);
Jiri Benc205f3562015-09-24 13:50:01 +02003037 if (IS_ERR(vs))
3038 return PTR_ERR(vs);
Jiri Bencb1be00a2015-09-24 13:50:02 +02003039#if IS_ENABLED(CONFIG_IPV6)
Jiri Benc69e76662017-07-02 19:00:57 +02003040 if (ipv6) {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07003041 rcu_assign_pointer(vxlan->vn6_sock, vs);
Jiri Benc69e76662017-07-02 19:00:57 +02003042 node = &vxlan->hlist6;
3043 } else
Jiri Bencb1be00a2015-09-24 13:50:02 +02003044#endif
Jiri Benc69e76662017-07-02 19:00:57 +02003045 {
pravin shelarc6fcc4f2016-10-28 09:59:15 -07003046 rcu_assign_pointer(vxlan->vn4_sock, vs);
Jiri Benc69e76662017-07-02 19:00:57 +02003047 node = &vxlan->hlist4;
3048 }
3049 vxlan_vs_add_dev(vs, vxlan, node);
Jiri Benc205f3562015-09-24 13:50:01 +02003050 return 0;
stephen hemminger553675f2013-05-16 11:35:20 +00003051}
3052
Jiri Bencb1be00a2015-09-24 13:50:02 +02003053static int vxlan_sock_add(struct vxlan_dev *vxlan)
3054{
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003055 bool metadata = vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA;
3056 bool ipv6 = vxlan->cfg.flags & VXLAN_F_IPV6 || metadata;
Jiri Bencd074bf92017-04-27 21:24:35 +02003057 bool ipv4 = !ipv6 || metadata;
Jiri Bencb1be00a2015-09-24 13:50:02 +02003058 int ret = 0;
3059
pravin shelarc6fcc4f2016-10-28 09:59:15 -07003060 RCU_INIT_POINTER(vxlan->vn4_sock, NULL);
Jiri Bencb1be00a2015-09-24 13:50:02 +02003061#if IS_ENABLED(CONFIG_IPV6)
pravin shelarc6fcc4f2016-10-28 09:59:15 -07003062 RCU_INIT_POINTER(vxlan->vn6_sock, NULL);
Jiri Bencd074bf92017-04-27 21:24:35 +02003063 if (ipv6) {
Jiri Bencb1be00a2015-09-24 13:50:02 +02003064 ret = __vxlan_sock_add(vxlan, true);
Jiri Bencd074bf92017-04-27 21:24:35 +02003065 if (ret < 0 && ret != -EAFNOSUPPORT)
3066 ipv4 = false;
3067 }
Jiri Bencb1be00a2015-09-24 13:50:02 +02003068#endif
Jiri Bencd074bf92017-04-27 21:24:35 +02003069 if (ipv4)
Jiri Bencb1be00a2015-09-24 13:50:02 +02003070 ret = __vxlan_sock_add(vxlan, false);
3071 if (ret < 0)
3072 vxlan_sock_release(vxlan);
3073 return ret;
3074}
3075
Matthias Schiffera9853432017-06-19 10:03:55 +02003076static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf,
3077 struct net_device **lower,
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003078 struct vxlan_dev *old,
3079 struct netlink_ext_ack *extack)
stephen hemmingerd3428942012-10-01 12:32:35 +00003080{
Nicolas Dichtel33564bb2015-01-26 22:28:14 +01003081 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
Matthias Schiffera9853432017-06-19 10:03:55 +02003082 struct vxlan_dev *tmp;
3083 bool use_ipv6 = false;
3084
3085 if (conf->flags & VXLAN_F_GPE) {
3086 /* For now, allow GPE only together with
3087 * COLLECT_METADATA. This can be relaxed later; in such
3088 * case, the other side of the PtP link will have to be
3089 * provided.
3090 */
3091 if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) ||
3092 !(conf->flags & VXLAN_F_COLLECT_METADATA)) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003093 NL_SET_ERR_MSG(extack,
3094 "VXLAN GPE does not support this combination of attributes");
Matthias Schiffera9853432017-06-19 10:03:55 +02003095 return -EINVAL;
3096 }
3097 }
3098
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003099 if (!conf->remote_ip.sa.sa_family && !conf->saddr.sa.sa_family) {
3100 /* Unless IPv6 is explicitly requested, assume IPv4 */
Matthias Schiffera9853432017-06-19 10:03:55 +02003101 conf->remote_ip.sa.sa_family = AF_INET;
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003102 conf->saddr.sa.sa_family = AF_INET;
3103 } else if (!conf->remote_ip.sa.sa_family) {
3104 conf->remote_ip.sa.sa_family = conf->saddr.sa.sa_family;
3105 } else if (!conf->saddr.sa.sa_family) {
3106 conf->saddr.sa.sa_family = conf->remote_ip.sa.sa_family;
3107 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003108
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003109 if (conf->saddr.sa.sa_family != conf->remote_ip.sa.sa_family) {
3110 NL_SET_ERR_MSG(extack,
3111 "Local and remote address must be from the same family");
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003112 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003113 }
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003114
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003115 if (vxlan_addr_multicast(&conf->saddr)) {
3116 NL_SET_ERR_MSG(extack, "Local address cannot be multicast");
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003117 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003118 }
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003119
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003120 if (conf->saddr.sa.sa_family == AF_INET6) {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003121 if (!IS_ENABLED(CONFIG_IPV6)) {
3122 NL_SET_ERR_MSG(extack,
3123 "IPv6 support not enabled in the kernel");
Matthias Schiffera9853432017-06-19 10:03:55 +02003124 return -EPFNOSUPPORT;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003125 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003126 use_ipv6 = true;
3127 conf->flags |= VXLAN_F_IPV6;
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003128
3129 if (!(conf->flags & VXLAN_F_COLLECT_METADATA)) {
3130 int local_type =
3131 ipv6_addr_type(&conf->saddr.sin6.sin6_addr);
3132 int remote_type =
3133 ipv6_addr_type(&conf->remote_ip.sin6.sin6_addr);
3134
3135 if (local_type & IPV6_ADDR_LINKLOCAL) {
3136 if (!(remote_type & IPV6_ADDR_LINKLOCAL) &&
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003137 (remote_type != IPV6_ADDR_ANY)) {
3138 NL_SET_ERR_MSG(extack,
3139 "Invalid combination of local and remote address scopes");
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003140 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003141 }
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003142
3143 conf->flags |= VXLAN_F_IPV6_LINKLOCAL;
3144 } else {
3145 if (remote_type ==
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003146 (IPV6_ADDR_UNICAST | IPV6_ADDR_LINKLOCAL)) {
3147 NL_SET_ERR_MSG(extack,
3148 "Invalid combination of local and remote address scopes");
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003149 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003150 }
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003151
3152 conf->flags &= ~VXLAN_F_IPV6_LINKLOCAL;
3153 }
3154 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003155 }
3156
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003157 if (conf->label && !use_ipv6) {
3158 NL_SET_ERR_MSG(extack,
3159 "Label attribute only applies to IPv6 VXLAN devices");
Matthias Schiffera9853432017-06-19 10:03:55 +02003160 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003161 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003162
3163 if (conf->remote_ifindex) {
3164 struct net_device *lowerdev;
3165
3166 lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex);
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003167 if (!lowerdev) {
3168 NL_SET_ERR_MSG(extack,
3169 "Invalid local interface, device not found");
Matthias Schiffera9853432017-06-19 10:03:55 +02003170 return -ENODEV;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003171 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003172
3173#if IS_ENABLED(CONFIG_IPV6)
3174 if (use_ipv6) {
3175 struct inet6_dev *idev = __in6_dev_get(lowerdev);
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003176 if (idev && idev->cnf.disable_ipv6) {
3177 NL_SET_ERR_MSG(extack,
3178 "IPv6 support disabled by administrator");
Matthias Schiffera9853432017-06-19 10:03:55 +02003179 return -EPERM;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003180 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003181 }
3182#endif
3183
3184 *lower = lowerdev;
3185 } else {
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003186 if (vxlan_addr_multicast(&conf->remote_ip)) {
3187 NL_SET_ERR_MSG(extack,
3188 "Local interface required for multicast remote destination");
3189
Matthias Schiffera9853432017-06-19 10:03:55 +02003190 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003191 }
Matthias Schiffera9853432017-06-19 10:03:55 +02003192
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003193#if IS_ENABLED(CONFIG_IPV6)
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003194 if (conf->flags & VXLAN_F_IPV6_LINKLOCAL) {
3195 NL_SET_ERR_MSG(extack,
3196 "Local interface required for link-local local/remote addresses");
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003197 return -EINVAL;
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003198 }
Matthias Schiffer0f22a3c2017-06-19 10:03:58 +02003199#endif
3200
Matthias Schiffera9853432017-06-19 10:03:55 +02003201 *lower = NULL;
3202 }
3203
3204 if (!conf->dst_port) {
3205 if (conf->flags & VXLAN_F_GPE)
3206 conf->dst_port = htons(4790); /* IANA VXLAN-GPE port */
3207 else
3208 conf->dst_port = htons(vxlan_port);
3209 }
3210
3211 if (!conf->age_interval)
3212 conf->age_interval = FDB_AGE_DEFAULT;
3213
3214 list_for_each_entry(tmp, &vn->vxlan_list, next) {
3215 if (tmp == old)
3216 continue;
3217
Matthias Schiffer49f810f2017-06-19 10:04:00 +02003218 if (tmp->cfg.vni != conf->vni)
3219 continue;
3220 if (tmp->cfg.dst_port != conf->dst_port)
3221 continue;
3222 if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) !=
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003223 (conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)))
Matthias Schiffer49f810f2017-06-19 10:04:00 +02003224 continue;
3225
3226 if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) &&
3227 tmp->cfg.remote_ifindex != conf->remote_ifindex)
3228 continue;
3229
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003230 NL_SET_ERR_MSG(extack,
3231 "A VXLAN device with the specified VNI already exists");
Matthias Schiffer49f810f2017-06-19 10:04:00 +02003232 return -EEXIST;
Matthias Schiffera9853432017-06-19 10:03:55 +02003233 }
3234
3235 return 0;
3236}
3237
3238static void vxlan_config_apply(struct net_device *dev,
3239 struct vxlan_config *conf,
Sabrina Dubroca889ce932017-06-30 15:50:00 +02003240 struct net_device *lowerdev,
3241 struct net *src_net,
3242 bool changelink)
Matthias Schiffera9853432017-06-19 10:03:55 +02003243{
3244 struct vxlan_dev *vxlan = netdev_priv(dev);
Atzm Watanabec7995c42013-04-16 02:50:52 +00003245 struct vxlan_rdst *dst = &vxlan->default_dst;
Jiri Bencb1be00a2015-09-24 13:50:02 +02003246 unsigned short needed_headroom = ETH_HLEN;
Matthias Schiffera9853432017-06-19 10:03:55 +02003247 bool use_ipv6 = !!(conf->flags & VXLAN_F_IPV6);
3248 int max_mtu = ETH_MAX_MTU;
stephen hemmingerd3428942012-10-01 12:32:35 +00003249
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003250 if (!changelink) {
Matthias Schiffera9853432017-06-19 10:03:55 +02003251 if (conf->flags & VXLAN_F_GPE)
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003252 vxlan_raw_setup(dev);
Matthias Schiffera9853432017-06-19 10:03:55 +02003253 else
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003254 vxlan_ether_setup(dev);
Jiri Bence1e53142016-04-05 14:47:13 +02003255
Matthias Schiffera9853432017-06-19 10:03:55 +02003256 if (conf->mtu)
3257 dev->mtu = conf->mtu;
Sabrina Dubroca889ce932017-06-30 15:50:00 +02003258
3259 vxlan->net = src_net;
Jiri Bence1e53142016-04-05 14:47:13 +02003260 }
Jiri Benc0c867c92016-04-05 14:47:10 +02003261
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003262 dst->remote_vni = conf->vni;
3263
3264 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
stephen hemmingerd3428942012-10-01 12:32:35 +00003265
Matthias Schiffera9853432017-06-19 10:03:55 +02003266 if (lowerdev) {
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003267 dst->remote_ifindex = conf->remote_ifindex;
stephen hemmingerd3428942012-10-01 12:32:35 +00003268
Felix Manlunasd6acfeb2017-03-29 17:56:43 -07003269 dev->gso_max_size = lowerdev->gso_max_size;
3270 dev->gso_max_segs = lowerdev->gso_max_segs;
Matthias Schiffera9853432017-06-19 10:03:55 +02003271
3272 needed_headroom = lowerdev->hard_header_len;
3273
3274 max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM :
3275 VXLAN_HEADROOM);
Alexey Kodanevf870c1f2017-12-14 20:20:00 +03003276 if (max_mtu < ETH_MIN_MTU)
3277 max_mtu = ETH_MIN_MTU;
3278
3279 if (!changelink && !conf->mtu)
3280 dev->mtu = max_mtu;
Felix Manlunasd6acfeb2017-03-29 17:56:43 -07003281 }
3282
Matthias Schiffera9853432017-06-19 10:03:55 +02003283 if (dev->mtu > max_mtu)
3284 dev->mtu = max_mtu;
David Wragg7e059152016-02-10 00:05:58 +00003285
Jiri Bencb1be00a2015-09-24 13:50:02 +02003286 if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
3287 needed_headroom += VXLAN6_HEADROOM;
3288 else
3289 needed_headroom += VXLAN_HEADROOM;
3290 dev->needed_headroom = needed_headroom;
3291
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003292 memcpy(&vxlan->cfg, conf, sizeof(*conf));
Matthias Schiffera9853432017-06-19 10:03:55 +02003293}
stephen hemmingerd3428942012-10-01 12:32:35 +00003294
Matthias Schiffera9853432017-06-19 10:03:55 +02003295static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003296 struct vxlan_config *conf, bool changelink,
3297 struct netlink_ext_ack *extack)
Matthias Schiffera9853432017-06-19 10:03:55 +02003298{
3299 struct vxlan_dev *vxlan = netdev_priv(dev);
3300 struct net_device *lowerdev;
3301 int ret;
Vincent Bernatafb97182012-10-30 10:27:16 +00003302
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003303 ret = vxlan_config_validate(src_net, conf, &lowerdev, vxlan, extack);
Matthias Schiffera9853432017-06-19 10:03:55 +02003304 if (ret)
3305 return ret;
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003306
Sabrina Dubroca889ce932017-06-30 15:50:00 +02003307 vxlan_config_apply(dev, conf, lowerdev, src_net, changelink);
stephen hemminger553675f2013-05-16 11:35:20 +00003308
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003309 return 0;
3310}
3311
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003312static int __vxlan_dev_create(struct net *net, struct net_device *dev,
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003313 struct vxlan_config *conf,
3314 struct netlink_ext_ack *extack)
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003315{
3316 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3317 struct vxlan_dev *vxlan = netdev_priv(dev);
Roopa Prabhu0241b832018-07-04 16:46:32 -07003318 struct vxlan_fdb *f = NULL;
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003319 int err;
3320
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003321 err = vxlan_dev_configure(net, dev, conf, false, extack);
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003322 if (err)
3323 return err;
3324
3325 dev->ethtool_ops = &vxlan_ethtool_ops;
3326
3327 /* create an fdb entry for a valid default destination */
3328 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
Roopa Prabhu0241b832018-07-04 16:46:32 -07003329 err = vxlan_fdb_create(vxlan, all_zeros_mac,
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003330 &vxlan->default_dst.remote_ip,
3331 NUD_REACHABLE | NUD_PERMANENT,
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003332 vxlan->cfg.dst_port,
3333 vxlan->default_dst.remote_vni,
3334 vxlan->default_dst.remote_vni,
3335 vxlan->default_dst.remote_ifindex,
Roopa Prabhu0241b832018-07-04 16:46:32 -07003336 NTF_SELF, &f);
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003337 if (err)
3338 return err;
3339 }
3340
3341 err = register_netdevice(dev);
Roopa Prabhu0241b832018-07-04 16:46:32 -07003342 if (err)
3343 goto errout;
3344
3345 err = rtnl_configure_link(dev, NULL);
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003346 if (err) {
Roopa Prabhu0241b832018-07-04 16:46:32 -07003347 unregister_netdevice(dev);
3348 goto errout;
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003349 }
3350
Roopa Prabhu0241b832018-07-04 16:46:32 -07003351 /* notify default fdb entry */
3352 if (f)
Petr Machata0e6160f2018-11-21 08:02:35 +00003353 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_NEWNEIGH,
3354 true);
Roopa Prabhu0241b832018-07-04 16:46:32 -07003355
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003356 list_add(&vxlan->next, &vn->vxlan_list);
3357 return 0;
Roopa Prabhu0241b832018-07-04 16:46:32 -07003358errout:
3359 if (f)
Petr Machata0e6160f2018-11-21 08:02:35 +00003360 vxlan_fdb_destroy(vxlan, f, false, false);
Roopa Prabhu0241b832018-07-04 16:46:32 -07003361 return err;
Nicolas Dichtelc80498e2017-03-13 16:24:03 +01003362}
3363
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003364static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
3365 struct net_device *dev, struct vxlan_config *conf,
3366 bool changelink)
3367{
3368 struct vxlan_dev *vxlan = netdev_priv(dev);
3369
3370 memset(conf, 0, sizeof(*conf));
3371
3372 /* if changelink operation, start with old existing cfg */
3373 if (changelink)
3374 memcpy(conf, &vxlan->cfg, sizeof(*conf));
3375
3376 if (data[IFLA_VXLAN_ID]) {
3377 __be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
3378
3379 if (changelink && (vni != conf->vni))
3380 return -EOPNOTSUPP;
3381 conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
3382 }
3383
3384 if (data[IFLA_VXLAN_GROUP]) {
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003385 if (changelink && (conf->remote_ip.sa.sa_family != AF_INET))
3386 return -EOPNOTSUPP;
3387
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003388 conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003389 conf->remote_ip.sa.sa_family = AF_INET;
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003390 } else if (data[IFLA_VXLAN_GROUP6]) {
3391 if (!IS_ENABLED(CONFIG_IPV6))
3392 return -EPFNOSUPPORT;
3393
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003394 if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6))
3395 return -EOPNOTSUPP;
3396
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003397 conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
3398 conf->remote_ip.sa.sa_family = AF_INET6;
3399 }
3400
3401 if (data[IFLA_VXLAN_LOCAL]) {
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003402 if (changelink && (conf->saddr.sa.sa_family != AF_INET))
3403 return -EOPNOTSUPP;
3404
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003405 conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
3406 conf->saddr.sa.sa_family = AF_INET;
3407 } else if (data[IFLA_VXLAN_LOCAL6]) {
3408 if (!IS_ENABLED(CONFIG_IPV6))
3409 return -EPFNOSUPPORT;
3410
Matthias Schifferce44a4a2017-06-19 10:03:57 +02003411 if (changelink && (conf->saddr.sa.sa_family != AF_INET6))
3412 return -EOPNOTSUPP;
3413
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003414 /* TODO: respect scope id */
3415 conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
3416 conf->saddr.sa.sa_family = AF_INET6;
3417 }
3418
3419 if (data[IFLA_VXLAN_LINK])
3420 conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
3421
3422 if (data[IFLA_VXLAN_TOS])
3423 conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
3424
3425 if (data[IFLA_VXLAN_TTL])
3426 conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
3427
Hangbin Liu72f6d712018-04-17 14:11:28 +08003428 if (data[IFLA_VXLAN_TTL_INHERIT]) {
3429 if (changelink)
3430 return -EOPNOTSUPP;
3431 conf->flags |= VXLAN_F_TTL_INHERIT;
3432 }
3433
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003434 if (data[IFLA_VXLAN_LABEL])
3435 conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) &
3436 IPV6_FLOWLABEL_MASK;
3437
3438 if (data[IFLA_VXLAN_LEARNING]) {
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003439 if (nla_get_u8(data[IFLA_VXLAN_LEARNING]))
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003440 conf->flags |= VXLAN_F_LEARN;
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003441 else
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003442 conf->flags &= ~VXLAN_F_LEARN;
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003443 } else if (!changelink) {
3444 /* default to learn on a new device */
3445 conf->flags |= VXLAN_F_LEARN;
3446 }
3447
3448 if (data[IFLA_VXLAN_AGEING]) {
3449 if (changelink)
3450 return -EOPNOTSUPP;
3451 conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
3452 }
3453
3454 if (data[IFLA_VXLAN_PROXY]) {
3455 if (changelink)
3456 return -EOPNOTSUPP;
3457 if (nla_get_u8(data[IFLA_VXLAN_PROXY]))
3458 conf->flags |= VXLAN_F_PROXY;
3459 }
3460
3461 if (data[IFLA_VXLAN_RSC]) {
3462 if (changelink)
3463 return -EOPNOTSUPP;
3464 if (nla_get_u8(data[IFLA_VXLAN_RSC]))
3465 conf->flags |= VXLAN_F_RSC;
3466 }
3467
3468 if (data[IFLA_VXLAN_L2MISS]) {
3469 if (changelink)
3470 return -EOPNOTSUPP;
3471 if (nla_get_u8(data[IFLA_VXLAN_L2MISS]))
3472 conf->flags |= VXLAN_F_L2MISS;
3473 }
3474
3475 if (data[IFLA_VXLAN_L3MISS]) {
3476 if (changelink)
3477 return -EOPNOTSUPP;
3478 if (nla_get_u8(data[IFLA_VXLAN_L3MISS]))
3479 conf->flags |= VXLAN_F_L3MISS;
3480 }
3481
3482 if (data[IFLA_VXLAN_LIMIT]) {
3483 if (changelink)
3484 return -EOPNOTSUPP;
3485 conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
3486 }
3487
3488 if (data[IFLA_VXLAN_COLLECT_METADATA]) {
3489 if (changelink)
3490 return -EOPNOTSUPP;
3491 if (nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
3492 conf->flags |= VXLAN_F_COLLECT_METADATA;
3493 }
3494
3495 if (data[IFLA_VXLAN_PORT_RANGE]) {
3496 if (!changelink) {
3497 const struct ifla_vxlan_port_range *p
3498 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
3499 conf->port_min = ntohs(p->low);
3500 conf->port_max = ntohs(p->high);
3501 } else {
3502 return -EOPNOTSUPP;
3503 }
3504 }
3505
3506 if (data[IFLA_VXLAN_PORT]) {
3507 if (changelink)
3508 return -EOPNOTSUPP;
3509 conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
3510 }
3511
3512 if (data[IFLA_VXLAN_UDP_CSUM]) {
3513 if (changelink)
3514 return -EOPNOTSUPP;
3515 if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
3516 conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
3517 }
3518
3519 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) {
3520 if (changelink)
3521 return -EOPNOTSUPP;
3522 if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
3523 conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
3524 }
3525
3526 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) {
3527 if (changelink)
3528 return -EOPNOTSUPP;
3529 if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
3530 conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
3531 }
3532
3533 if (data[IFLA_VXLAN_REMCSUM_TX]) {
3534 if (changelink)
3535 return -EOPNOTSUPP;
3536 if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
3537 conf->flags |= VXLAN_F_REMCSUM_TX;
3538 }
3539
3540 if (data[IFLA_VXLAN_REMCSUM_RX]) {
3541 if (changelink)
3542 return -EOPNOTSUPP;
3543 if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
3544 conf->flags |= VXLAN_F_REMCSUM_RX;
3545 }
3546
3547 if (data[IFLA_VXLAN_GBP]) {
3548 if (changelink)
3549 return -EOPNOTSUPP;
3550 conf->flags |= VXLAN_F_GBP;
3551 }
3552
3553 if (data[IFLA_VXLAN_GPE]) {
3554 if (changelink)
3555 return -EOPNOTSUPP;
3556 conf->flags |= VXLAN_F_GPE;
3557 }
3558
3559 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) {
3560 if (changelink)
3561 return -EOPNOTSUPP;
3562 conf->flags |= VXLAN_F_REMCSUM_NOPARTIAL;
3563 }
3564
3565 if (tb[IFLA_MTU]) {
3566 if (changelink)
3567 return -EOPNOTSUPP;
3568 conf->mtu = nla_get_u32(tb[IFLA_MTU]);
3569 }
3570
Stefano Briviob4d306972018-11-08 12:19:16 +01003571 if (data[IFLA_VXLAN_DF])
3572 conf->df = nla_get_u8(data[IFLA_VXLAN_DF]);
3573
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003574 return 0;
3575}
3576
3577static int vxlan_newlink(struct net *src_net, struct net_device *dev,
Matthias Schiffer7a3f4a12017-06-25 23:55:59 +02003578 struct nlattr *tb[], struct nlattr *data[],
3579 struct netlink_ext_ack *extack)
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003580{
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003581 struct vxlan_config conf;
3582 int err;
3583
3584 err = vxlan_nl2conf(tb, data, dev, &conf, false);
3585 if (err)
3586 return err;
3587
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003588 return __vxlan_dev_create(src_net, dev, &conf, extack);
stephen hemmingerd3428942012-10-01 12:32:35 +00003589}
3590
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003591static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
Matthias Schifferad744b22017-06-25 23:56:00 +02003592 struct nlattr *data[],
3593 struct netlink_ext_ack *extack)
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003594{
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003595 struct vxlan_dev *vxlan = netdev_priv(dev);
3596 struct vxlan_rdst *dst = &vxlan->default_dst;
3597 struct vxlan_rdst old_dst;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003598 struct vxlan_config conf;
Roopa Prabhu0241b832018-07-04 16:46:32 -07003599 struct vxlan_fdb *f = NULL;
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003600 int err;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003601
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003602 err = vxlan_nl2conf(tb, data,
3603 dev, &conf, true);
3604 if (err)
3605 return err;
Jesse Grosse277de52015-10-16 16:36:00 -07003606
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003607 memcpy(&old_dst, dst, sizeof(struct vxlan_rdst));
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003608
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003609 err = vxlan_dev_configure(vxlan->net, dev, &conf, true, extack);
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003610 if (err)
3611 return err;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003612
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003613 /* handle default dst entry */
3614 if (!vxlan_addr_equal(&dst->remote_ip, &old_dst.remote_ip)) {
3615 spin_lock_bh(&vxlan->hash_lock);
3616 if (!vxlan_addr_any(&old_dst.remote_ip))
3617 __vxlan_fdb_delete(vxlan, all_zeros_mac,
3618 old_dst.remote_ip,
3619 vxlan->cfg.dst_port,
3620 old_dst.remote_vni,
3621 old_dst.remote_vni,
Petr Machata0e6160f2018-11-21 08:02:35 +00003622 old_dst.remote_ifindex,
3623 true);
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003624
3625 if (!vxlan_addr_any(&dst->remote_ip)) {
Roopa Prabhu0241b832018-07-04 16:46:32 -07003626 err = vxlan_fdb_create(vxlan, all_zeros_mac,
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003627 &dst->remote_ip,
3628 NUD_REACHABLE | NUD_PERMANENT,
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003629 vxlan->cfg.dst_port,
3630 dst->remote_vni,
3631 dst->remote_vni,
3632 dst->remote_ifindex,
Roopa Prabhu0241b832018-07-04 16:46:32 -07003633 NTF_SELF, &f);
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003634 if (err) {
3635 spin_unlock_bh(&vxlan->hash_lock);
3636 return err;
3637 }
Petr Machata0e6160f2018-11-21 08:02:35 +00003638 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f),
3639 RTM_NEWNEIGH, true);
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003640 }
3641 spin_unlock_bh(&vxlan->hash_lock);
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003642 }
3643
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003644 return 0;
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003645}
3646
stephen hemmingerd3428942012-10-01 12:32:35 +00003647static void vxlan_dellink(struct net_device *dev, struct list_head *head)
3648{
3649 struct vxlan_dev *vxlan = netdev_priv(dev);
3650
Roopa Prabhu8b3f9332017-01-23 20:44:32 -08003651 vxlan_flush(vxlan, true);
3652
Tom Herbert58ce31c2015-08-19 17:07:33 -07003653 gro_cells_destroy(&vxlan->gro_cells);
stephen hemminger553675f2013-05-16 11:35:20 +00003654 list_del(&vxlan->next);
stephen hemmingerd3428942012-10-01 12:32:35 +00003655 unregister_netdevice_queue(dev, head);
3656}
3657
3658static size_t vxlan_get_size(const struct net_device *dev)
3659{
3660
3661 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
Cong Wange4c7ed42013-08-31 13:44:33 +08003662 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00003663 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
Cong Wange4c7ed42013-08-31 13:44:33 +08003664 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
stephen hemmingerd3428942012-10-01 12:32:35 +00003665 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
Hangbin Liu8fd78062018-09-26 10:35:42 +08003666 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL_INHERIT */
stephen hemmingerd3428942012-10-01 12:32:35 +00003667 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
Stefano Briviob4d306972018-11-08 12:19:16 +01003668 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_DF */
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01003669 nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */
stephen hemmingerd3428942012-10-01 12:32:35 +00003670 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
David Stevense4f67ad2012-11-20 02:50:14 +00003671 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
3672 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
3673 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
3674 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07003675 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
stephen hemmingerd3428942012-10-01 12:32:35 +00003676 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
3677 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
stephen hemminger05f47d62012-10-09 20:35:50 +00003678 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
Tom Herbert359a0ea2014-06-04 17:20:29 -07003679 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
3680 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
3681 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3682 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
Tom Herbertdfd86452015-01-12 17:00:38 -08003683 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
3684 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
stephen hemmingerd3428942012-10-01 12:32:35 +00003685 0;
3686}
3687
3688static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
3689{
3690 const struct vxlan_dev *vxlan = netdev_priv(dev);
Atzm Watanabec7995c42013-04-16 02:50:52 +00003691 const struct vxlan_rdst *dst = &vxlan->default_dst;
stephen hemminger05f47d62012-10-09 20:35:50 +00003692 struct ifla_vxlan_port_range ports = {
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003693 .low = htons(vxlan->cfg.port_min),
3694 .high = htons(vxlan->cfg.port_max),
stephen hemminger05f47d62012-10-09 20:35:50 +00003695 };
stephen hemmingerd3428942012-10-01 12:32:35 +00003696
Jiri Benc54bfd872016-02-16 21:58:58 +01003697 if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni)))
stephen hemmingerd3428942012-10-01 12:32:35 +00003698 goto nla_put_failure;
3699
Cong Wange4c7ed42013-08-31 13:44:33 +08003700 if (!vxlan_addr_any(&dst->remote_ip)) {
3701 if (dst->remote_ip.sa.sa_family == AF_INET) {
Jiri Benc930345e2015-03-29 16:59:25 +02003702 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
3703 dst->remote_ip.sin.sin_addr.s_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003704 goto nla_put_failure;
3705#if IS_ENABLED(CONFIG_IPV6)
3706 } else {
Jiri Benc930345e2015-03-29 16:59:25 +02003707 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
3708 &dst->remote_ip.sin6.sin6_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003709 goto nla_put_failure;
3710#endif
3711 }
3712 }
stephen hemmingerd3428942012-10-01 12:32:35 +00003713
Atzm Watanabec7995c42013-04-16 02:50:52 +00003714 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
stephen hemmingerd3428942012-10-01 12:32:35 +00003715 goto nla_put_failure;
3716
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003717 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
3718 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
Jiri Benc930345e2015-03-29 16:59:25 +02003719 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003720 vxlan->cfg.saddr.sin.sin_addr.s_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003721 goto nla_put_failure;
3722#if IS_ENABLED(CONFIG_IPV6)
3723 } else {
Jiri Benc930345e2015-03-29 16:59:25 +02003724 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003725 &vxlan->cfg.saddr.sin6.sin6_addr))
Cong Wange4c7ed42013-08-31 13:44:33 +08003726 goto nla_put_failure;
3727#endif
3728 }
3729 }
stephen hemmingerd3428942012-10-01 12:32:35 +00003730
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003731 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
Hangbin Liu8fd78062018-09-26 10:35:42 +08003732 nla_put_u8(skb, IFLA_VXLAN_TTL_INHERIT,
3733 !!(vxlan->cfg.flags & VXLAN_F_TTL_INHERIT)) ||
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003734 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
Stefano Briviob4d306972018-11-08 12:19:16 +01003735 nla_put_u8(skb, IFLA_VXLAN_DF, vxlan->cfg.df) ||
Daniel Borkmanne7f70af2016-03-09 03:00:03 +01003736 nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) ||
David Stevense4f67ad2012-11-20 02:50:14 +00003737 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003738 !!(vxlan->cfg.flags & VXLAN_F_LEARN)) ||
David Stevense4f67ad2012-11-20 02:50:14 +00003739 nla_put_u8(skb, IFLA_VXLAN_PROXY,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003740 !!(vxlan->cfg.flags & VXLAN_F_PROXY)) ||
3741 nla_put_u8(skb, IFLA_VXLAN_RSC,
3742 !!(vxlan->cfg.flags & VXLAN_F_RSC)) ||
David Stevense4f67ad2012-11-20 02:50:14 +00003743 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003744 !!(vxlan->cfg.flags & VXLAN_F_L2MISS)) ||
David Stevense4f67ad2012-11-20 02:50:14 +00003745 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003746 !!(vxlan->cfg.flags & VXLAN_F_L3MISS)) ||
Alexei Starovoitovda8b43c2015-08-04 22:51:07 -07003747 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003748 !!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)) ||
Thomas Graf0dfbdf42015-07-21 10:44:02 +02003749 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
3750 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
3751 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07003752 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003753 !(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM_TX)) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07003754 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003755 !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
Tom Herbert359a0ea2014-06-04 17:20:29 -07003756 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003757 !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
Tom Herbertdfd86452015-01-12 17:00:38 -08003758 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003759 !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_TX)) ||
Tom Herbertdfd86452015-01-12 17:00:38 -08003760 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003761 !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_RX)))
stephen hemmingerd3428942012-10-01 12:32:35 +00003762 goto nla_put_failure;
3763
stephen hemminger05f47d62012-10-09 20:35:50 +00003764 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
3765 goto nla_put_failure;
3766
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003767 if (vxlan->cfg.flags & VXLAN_F_GBP &&
Thomas Graf35114942015-01-15 03:53:55 +01003768 nla_put_flag(skb, IFLA_VXLAN_GBP))
3769 goto nla_put_failure;
3770
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003771 if (vxlan->cfg.flags & VXLAN_F_GPE &&
Jiri Bence1e53142016-04-05 14:47:13 +02003772 nla_put_flag(skb, IFLA_VXLAN_GPE))
3773 goto nla_put_failure;
3774
Matthias Schifferdc5321d2017-06-19 10:03:56 +02003775 if (vxlan->cfg.flags & VXLAN_F_REMCSUM_NOPARTIAL &&
Tom Herbert0ace2ca2015-02-10 16:30:32 -08003776 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3777 goto nla_put_failure;
3778
stephen hemmingerd3428942012-10-01 12:32:35 +00003779 return 0;
3780
3781nla_put_failure:
3782 return -EMSGSIZE;
3783}
3784
Nicolas Dichtel1728d4f2015-01-15 15:11:17 +01003785static struct net *vxlan_get_link_net(const struct net_device *dev)
3786{
3787 struct vxlan_dev *vxlan = netdev_priv(dev);
3788
3789 return vxlan->net;
3790}
3791
stephen hemmingerd3428942012-10-01 12:32:35 +00003792static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3793 .kind = "vxlan",
3794 .maxtype = IFLA_VXLAN_MAX,
3795 .policy = vxlan_policy,
3796 .priv_size = sizeof(struct vxlan_dev),
3797 .setup = vxlan_setup,
3798 .validate = vxlan_validate,
3799 .newlink = vxlan_newlink,
Roopa Prabhu8bcdc4f2017-02-20 08:29:19 -08003800 .changelink = vxlan_changelink,
stephen hemmingerd3428942012-10-01 12:32:35 +00003801 .dellink = vxlan_dellink,
3802 .get_size = vxlan_get_size,
3803 .fill_info = vxlan_fill_info,
Nicolas Dichtel1728d4f2015-01-15 15:11:17 +01003804 .get_link_net = vxlan_get_link_net,
stephen hemmingerd3428942012-10-01 12:32:35 +00003805};
3806
Nicolas Dichtelcf5da332016-06-13 10:31:05 +02003807struct net_device *vxlan_dev_create(struct net *net, const char *name,
3808 u8 name_assign_type,
3809 struct vxlan_config *conf)
3810{
3811 struct nlattr *tb[IFLA_MAX + 1];
3812 struct net_device *dev;
3813 int err;
3814
3815 memset(&tb, 0, sizeof(tb));
3816
3817 dev = rtnl_create_link(net, name, name_assign_type,
David Ahernd0522f12018-11-06 12:51:14 -08003818 &vxlan_link_ops, tb, NULL);
Nicolas Dichtelcf5da332016-06-13 10:31:05 +02003819 if (IS_ERR(dev))
3820 return dev;
3821
Girish Moodalbail653ef6a32017-08-11 15:20:59 -07003822 err = __vxlan_dev_create(net, dev, conf, NULL);
Nicolas Dichtelcf5da332016-06-13 10:31:05 +02003823 if (err < 0) {
3824 free_netdev(dev);
3825 return ERR_PTR(err);
3826 }
3827
3828 err = rtnl_configure_link(dev, NULL);
3829 if (err < 0) {
3830 LIST_HEAD(list_kill);
3831
3832 vxlan_dellink(dev, &list_kill);
3833 unregister_netdevice_many(&list_kill);
3834 return ERR_PTR(err);
3835 }
3836
3837 return dev;
3838}
3839EXPORT_SYMBOL_GPL(vxlan_dev_create);
3840
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003841static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3842 struct net_device *dev)
3843{
3844 struct vxlan_dev *vxlan, *next;
3845 LIST_HEAD(list_kill);
3846
3847 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3848 struct vxlan_rdst *dst = &vxlan->default_dst;
3849
3850 /* In case we created vxlan device with carrier
3851 * and we loose the carrier due to module unload
3852 * we also need to remove vxlan device. In other
3853 * cases, it's not necessary and remote_ifindex
3854 * is 0 here, so no matches.
3855 */
3856 if (dst->remote_ifindex == dev->ifindex)
3857 vxlan_dellink(vxlan->dev, &list_kill);
3858 }
3859
3860 unregister_netdevice_many(&list_kill);
3861}
3862
Hannes Frederic Sowab7aade12016-04-18 21:19:47 +02003863static int vxlan_netdevice_event(struct notifier_block *unused,
3864 unsigned long event, void *ptr)
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003865{
3866 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Daniel Borkmann783c1462014-01-22 21:07:53 +01003867 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003868
Sabrina Dubroca04584952017-07-21 12:49:33 +02003869 if (event == NETDEV_UNREGISTER) {
3870 vxlan_offload_rx_ports(dev, false);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003871 vxlan_handle_lowerdev_unregister(vn, dev);
Sabrina Dubroca04584952017-07-21 12:49:33 +02003872 } else if (event == NETDEV_REGISTER) {
3873 vxlan_offload_rx_ports(dev, true);
3874 } else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO ||
3875 event == NETDEV_UDP_TUNNEL_DROP_INFO) {
Sabrina Dubroca2d2b13f2017-07-21 12:49:32 +02003876 vxlan_offload_rx_ports(dev, event == NETDEV_UDP_TUNNEL_PUSH_INFO);
Sabrina Dubroca04584952017-07-21 12:49:33 +02003877 }
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003878
3879 return NOTIFY_DONE;
3880}
3881
3882static struct notifier_block vxlan_notifier_block __read_mostly = {
Hannes Frederic Sowab7aade12016-04-18 21:19:47 +02003883 .notifier_call = vxlan_netdevice_event,
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01003884};
3885
Petr Machata0efe1172018-10-17 08:53:26 +00003886static void
3887vxlan_fdb_offloaded_set(struct net_device *dev,
3888 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
3889{
3890 struct vxlan_dev *vxlan = netdev_priv(dev);
3891 struct vxlan_rdst *rdst;
3892 struct vxlan_fdb *f;
3893
3894 spin_lock_bh(&vxlan->hash_lock);
3895
3896 f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni);
3897 if (!f)
3898 goto out;
3899
3900 rdst = vxlan_fdb_find_rdst(f, &fdb_info->remote_ip,
3901 fdb_info->remote_port,
3902 fdb_info->remote_vni,
3903 fdb_info->remote_ifindex);
3904 if (!rdst)
3905 goto out;
3906
3907 rdst->offloaded = fdb_info->offloaded;
3908
3909out:
3910 spin_unlock_bh(&vxlan->hash_lock);
3911}
3912
3913static int vxlan_switchdev_event(struct notifier_block *unused,
3914 unsigned long event, void *ptr)
3915{
3916 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3917
3918 switch (event) {
3919 case SWITCHDEV_VXLAN_FDB_OFFLOADED:
3920 vxlan_fdb_offloaded_set(dev, ptr);
3921 break;
3922 }
3923
3924 return 0;
3925}
3926
3927static struct notifier_block vxlan_switchdev_notifier_block __read_mostly = {
3928 .notifier_call = vxlan_switchdev_event,
3929};
3930
stephen hemmingerd3428942012-10-01 12:32:35 +00003931static __net_init int vxlan_init_net(struct net *net)
3932{
3933 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
Cong Wang31fec5a2013-05-27 22:35:52 +00003934 unsigned int h;
stephen hemmingerd3428942012-10-01 12:32:35 +00003935
stephen hemminger553675f2013-05-16 11:35:20 +00003936 INIT_LIST_HEAD(&vn->vxlan_list);
Stephen Hemminger1c51a912013-06-17 14:16:11 -07003937 spin_lock_init(&vn->sock_lock);
stephen hemmingerd3428942012-10-01 12:32:35 +00003938
stephen hemminger553675f2013-05-16 11:35:20 +00003939 for (h = 0; h < PORT_HASH_SIZE; ++h)
3940 INIT_HLIST_HEAD(&vn->sock_list[h]);
stephen hemmingerd3428942012-10-01 12:32:35 +00003941
3942 return 0;
3943}
3944
Haishuang Yan57b61122017-12-16 17:54:49 +08003945static void vxlan_destroy_tunnels(struct net *net, struct list_head *head)
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003946{
3947 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3948 struct vxlan_dev *vxlan, *next;
3949 struct net_device *dev, *aux;
Vasily Averin0e4ec5a2017-11-12 22:28:10 +03003950 unsigned int h;
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003951
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003952 for_each_netdev_safe(net, dev, aux)
3953 if (dev->rtnl_link_ops == &vxlan_link_ops)
Haishuang Yan57b61122017-12-16 17:54:49 +08003954 unregister_netdevice_queue(dev, head);
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003955
3956 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3957 /* If vxlan->dev is in the same netns, it has already been added
3958 * to the list by the previous loop.
3959 */
Tom Herbert58ce31c2015-08-19 17:07:33 -07003960 if (!net_eq(dev_net(vxlan->dev), net)) {
3961 gro_cells_destroy(&vxlan->gro_cells);
Haishuang Yan57b61122017-12-16 17:54:49 +08003962 unregister_netdevice_queue(vxlan->dev, head);
Tom Herbert58ce31c2015-08-19 17:07:33 -07003963 }
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003964 }
3965
Vasily Averin0e4ec5a2017-11-12 22:28:10 +03003966 for (h = 0; h < PORT_HASH_SIZE; ++h)
3967 WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h]));
Nicolas Dichtelf01ec1c2014-04-24 10:02:49 +02003968}
3969
Haishuang Yan57b61122017-12-16 17:54:49 +08003970static void __net_exit vxlan_exit_batch_net(struct list_head *net_list)
3971{
3972 struct net *net;
3973 LIST_HEAD(list);
3974
3975 rtnl_lock();
3976 list_for_each_entry(net, net_list, exit_list)
3977 vxlan_destroy_tunnels(net, &list);
3978
3979 unregister_netdevice_many(&list);
3980 rtnl_unlock();
3981}
3982
stephen hemmingerd3428942012-10-01 12:32:35 +00003983static struct pernet_operations vxlan_net_ops = {
3984 .init = vxlan_init_net,
Haishuang Yan57b61122017-12-16 17:54:49 +08003985 .exit_batch = vxlan_exit_batch_net,
stephen hemmingerd3428942012-10-01 12:32:35 +00003986 .id = &vxlan_net_id,
3987 .size = sizeof(struct vxlan_net),
3988};
3989
3990static int __init vxlan_init_module(void)
3991{
3992 int rc;
3993
3994 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3995
Daniel Borkmann783c1462014-01-22 21:07:53 +01003996 rc = register_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00003997 if (rc)
3998 goto out1;
3999
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01004000 rc = register_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00004001 if (rc)
4002 goto out2;
4003
Petr Machata0efe1172018-10-17 08:53:26 +00004004 rc = register_switchdev_notifier(&vxlan_switchdev_notifier_block);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01004005 if (rc)
4006 goto out3;
stephen hemmingerd3428942012-10-01 12:32:35 +00004007
Petr Machata0efe1172018-10-17 08:53:26 +00004008 rc = rtnl_link_register(&vxlan_link_ops);
4009 if (rc)
4010 goto out4;
4011
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01004012 return 0;
Petr Machata0efe1172018-10-17 08:53:26 +00004013out4:
4014 unregister_switchdev_notifier(&vxlan_switchdev_notifier_block);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01004015out3:
4016 unregister_netdevice_notifier(&vxlan_notifier_block);
stephen hemmingerd3428942012-10-01 12:32:35 +00004017out2:
Daniel Borkmann783c1462014-01-22 21:07:53 +01004018 unregister_pernet_subsys(&vxlan_net_ops);
stephen hemmingerd3428942012-10-01 12:32:35 +00004019out1:
4020 return rc;
4021}
Cong Wang7332a132013-05-27 22:35:53 +00004022late_initcall(vxlan_init_module);
stephen hemmingerd3428942012-10-01 12:32:35 +00004023
4024static void __exit vxlan_cleanup_module(void)
4025{
Stephen Hemmingerb7153982013-06-17 14:16:09 -07004026 rtnl_link_unregister(&vxlan_link_ops);
Petr Machata0efe1172018-10-17 08:53:26 +00004027 unregister_switchdev_notifier(&vxlan_switchdev_notifier_block);
Daniel Borkmannacaf4e7092014-01-13 18:41:19 +01004028 unregister_netdevice_notifier(&vxlan_notifier_block);
Daniel Borkmann783c1462014-01-22 21:07:53 +01004029 unregister_pernet_subsys(&vxlan_net_ops);
4030 /* rcu_barrier() is called by netns */
stephen hemmingerd3428942012-10-01 12:32:35 +00004031}
4032module_exit(vxlan_cleanup_module);
4033
4034MODULE_LICENSE("GPL");
4035MODULE_VERSION(VXLAN_VERSION);
stephen hemminger3b8df3c2013-04-27 11:31:52 +00004036MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
Jesse Brandeburgead51392014-01-17 11:00:33 -08004037MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
stephen hemmingerd3428942012-10-01 12:32:35 +00004038MODULE_ALIAS_RTNL_LINK("vxlan");