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vxlan: keep flags and vni in network byte order
[mirror_ubuntu-bionic-kernel.git] / drivers / net / vxlan.c
CommitLineData
d342894c 1/*
eb5ce439 2 * VXLAN: Virtual eXtensible Local Area Network
d342894c 3 *
3b8df3c6 4 * Copyright (c) 2012-2013 Vyatta Inc.
d342894c 5 *
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.
d342894c 9 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <linux/kernel.h>
14#include <linux/types.h>
15#include <linux/module.h>
16#include <linux/errno.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/rculist.h>
20#include <linux/netdevice.h>
21#include <linux/in.h>
22#include <linux/ip.h>
23#include <linux/udp.h>
24#include <linux/igmp.h>
25#include <linux/etherdevice.h>
26#include <linux/if_ether.h>
1eaa8178 27#include <linux/if_vlan.h>
d342894c 28#include <linux/hash.h>
1b13c97f 29#include <linux/ethtool.h>
e4f67add
DS		 30#include <net/arp.h>
31#include <net/ndisc.h>
d342894c 32#include <net/ip.h>
c5441932 33#include <net/ip_tunnels.h>
d342894c 34#include <net/icmp.h>
35#include <net/udp.h>
3ee64f39 36#include <net/udp_tunnel.h>
d342894c 37#include <net/rtnetlink.h>
38#include <net/route.h>
39#include <net/dsfield.h>
40#include <net/inet_ecn.h>
41#include <net/net_namespace.h>
42#include <net/netns/generic.h>
012a5729 43#include <net/vxlan.h>
dc01e7d3 44#include <net/protocol.h>
40d29af0 45
e4c7ed41
CW		 46#if IS_ENABLED(CONFIG_IPV6)
47#include <net/ipv6.h>
48#include <net/addrconf.h>
49#include <net/ip6_tunnel.h>
660d98ca 50#include <net/ip6_checksum.h>
e4c7ed41 51#endif
ee122c79 52#include <net/dst_metadata.h>
d342894c 53
54#define VXLAN_VERSION "0.1"
55
553675fb 56#define PORT_HASH_BITS 8
57#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
d342894c 58#define FDB_AGE_DEFAULT 300 /* 5 min */
59#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
60
23c578bf 61/* UDP port for VXLAN traffic.
62 * The IANA assigned port is 4789, but the Linux default is 8472
234f5b73 63 * for compatibility with early adopters.
23c578bf 64 */
9daaa397
SH		 65static unsigned short vxlan_port __read_mostly = 8472;
66module_param_named(udp_port, vxlan_port, ushort, 0444);
d342894c 67MODULE_PARM_DESC(udp_port, "Destination UDP port");
68
69static bool log_ecn_error = true;
70module_param(log_ecn_error, bool, 0644);
71MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
72
60d9d4c6 73static int vxlan_net_id;
0dfbdf41 74static struct rtnl_link_ops vxlan_link_ops;
553675fb 75
7256eac1 76static const u8 all_zeros_mac[ETH_ALEN + 2];
afbd8bae 77
205f356d 78static int vxlan_sock_add(struct vxlan_dev *vxlan);
614732ea 79
553675fb 80/* per-network namespace private data for this module */
81struct vxlan_net {
82 struct list_head vxlan_list;
83 struct hlist_head sock_list[PORT_HASH_SIZE];
1c51a915 84 spinlock_t sock_lock;
553675fb 85};
86
d342894c 87/* Forwarding table entry */
88struct vxlan_fdb {
89 struct hlist_node hlist; /* linked list of entries */
90 struct rcu_head rcu;
91 unsigned long updated; /* jiffies */
92 unsigned long used;
3e61aa8f 93 struct list_head remotes;
7177a3b0 94 u8 eth_addr[ETH_ALEN];
d342894c 95 u16 state; /* see ndm_state */
ae884082 96 u8 flags; /* see ndm_flags */
d342894c 97};
98
d342894c 99/* salt for hash table */
100static u32 vxlan_salt __read_mostly;
758c57d1 101static struct workqueue_struct *vxlan_wq;
d342894c 102
ee122c79
TG		 103static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
104{
e7030878
TG		 105 return vs->flags & VXLAN_F_COLLECT_METADATA ||
106 ip_tunnel_collect_metadata();
ee122c79
TG		 107}
108
e4c7ed41
CW		 109#if IS_ENABLED(CONFIG_IPV6)
110static inline
111bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
112{
f0ef3126
JB		 113 if (a->sa.sa_family != b->sa.sa_family)
114 return false;
115 if (a->sa.sa_family == AF_INET6)
116 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
117 else
118 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 119}
120
121static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
122{
f0ef3126
JB		 123 if (ipa->sa.sa_family == AF_INET6)
124 return ipv6_addr_any(&ipa->sin6.sin6_addr);
125 else
126 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 127}
128
129static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
130{
f0ef3126
JB		 131 if (ipa->sa.sa_family == AF_INET6)
132 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
133 else
134 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 135}
136
137static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
138{
f0ef3126 139 if (nla_len(nla) >= sizeof(struct in6_addr)) {
67b61f6c 140 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
f0ef3126
JB		 141 ip->sa.sa_family = AF_INET6;
142 return 0;
143 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 144 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 145 ip->sa.sa_family = AF_INET;
146 return 0;
147 } else {
148 return -EAFNOSUPPORT;
149 }
e4c7ed41
CW		 150}
151
152static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 153 const union vxlan_addr *ip)
e4c7ed41 154{
f0ef3126 155 if (ip->sa.sa_family == AF_INET6)
930345ea 156 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
f0ef3126 157 else
930345ea 158 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 159}
160
161#else /* !CONFIG_IPV6 */
162
163static inline
164bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
165{
f0ef3126 166 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 167}
168
169static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
170{
f0ef3126 171 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 172}
173
174static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
175{
f0ef3126 176 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 177}
178
179static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
180{
f0ef3126
JB		 181 if (nla_len(nla) >= sizeof(struct in6_addr)) {
182 return -EAFNOSUPPORT;
183 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 184 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 185 ip->sa.sa_family = AF_INET;
186 return 0;
187 } else {
188 return -EAFNOSUPPORT;
189 }
e4c7ed41
CW		 190}
191
192static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 193 const union vxlan_addr *ip)
e4c7ed41 194{
930345ea 195 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 196}
197#endif
198
553675fb 199/* Virtual Network hash table head */
54bfd872 200static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni)
553675fb 201{
54bfd872 202 return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)];
553675fb 203}
204
205/* Socket hash table head */
206static inline struct hlist_head *vs_head(struct net *net, __be16 port)
d342894c 207{
208 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
209
553675fb 210 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
211}
212
3e61aa8f
SH		 213/* First remote destination for a forwarding entry.
214 * Guaranteed to be non-NULL because remotes are never deleted.
215 */
5ca5461c 216static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
3e61aa8f 217{
5ca5461c 218 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
219}
220
221static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
222{
223 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
3e61aa8f
SH		 224}
225
ac5132d1
TG		 226/* Find VXLAN socket based on network namespace, address family and UDP port
227 * and enabled unshareable flags.
228 */
229static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
230 __be16 port, u32 flags)
553675fb 231{
232 struct vxlan_sock *vs;
af33c1ad
TH		 233
234 flags &= VXLAN_F_RCV_FLAGS;
553675fb 235
236 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
19ca9fc1 237 if (inet_sk(vs->sock->sk)->inet_sport == port &&
705cc62f 238 vxlan_get_sk_family(vs) == family &&
af33c1ad 239 vs->flags == flags)
553675fb 240 return vs;
241 }
242 return NULL;
d342894c 243}
244
54bfd872 245static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, __be32 vni)
d342894c 246{
247 struct vxlan_dev *vxlan;
d342894c 248
54bfd872
JB		 249 hlist_for_each_entry_rcu(vxlan, vni_head(vs, vni), hlist) {
250 if (vxlan->default_dst.remote_vni == vni)
d342894c 251 return vxlan;
252 }
253
254 return NULL;
255}
256
5cfccc5a 257/* Look up VNI in a per net namespace table */
54bfd872 258static struct vxlan_dev *vxlan_find_vni(struct net *net, __be32 vni,
ac5132d1
TG		 259 sa_family_t family, __be16 port,
260 u32 flags)
5cfccc5a
PS		 261{
262 struct vxlan_sock *vs;
263
ac5132d1 264 vs = vxlan_find_sock(net, family, port, flags);
5cfccc5a
PS		 265 if (!vs)
266 return NULL;
267
54bfd872 268 return vxlan_vs_find_vni(vs, vni);
5cfccc5a
PS		 269}
270
d342894c 271/* Fill in neighbour message in skbuff. */
272static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
234f5b73
SH		 273 const struct vxlan_fdb *fdb,
274 u32 portid, u32 seq, int type, unsigned int flags,
275 const struct vxlan_rdst *rdst)
d342894c 276{
277 unsigned long now = jiffies;
278 struct nda_cacheinfo ci;
279 struct nlmsghdr *nlh;
280 struct ndmsg *ndm;
e4f67add 281 bool send_ip, send_eth;
d342894c 282
283 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
284 if (nlh == NULL)
285 return -EMSGSIZE;
286
287 ndm = nlmsg_data(nlh);
288 memset(ndm, 0, sizeof(*ndm));
e4f67add
DS		 289
290 send_eth = send_ip = true;
291
292 if (type == RTM_GETNEIGH) {
293 ndm->ndm_family = AF_INET;
e4c7ed41 294 send_ip = !vxlan_addr_any(&rdst->remote_ip);
e4f67add
DS		 295 send_eth = !is_zero_ether_addr(fdb->eth_addr);
296 } else
297 ndm->ndm_family = AF_BRIDGE;
d342894c 298 ndm->ndm_state = fdb->state;
299 ndm->ndm_ifindex = vxlan->dev->ifindex;
ae884082 300 ndm->ndm_flags = fdb->flags;
545469f7 301 ndm->ndm_type = RTN_UNICAST;
d342894c 302
193523bf 303 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
4967082b 304 nla_put_s32(skb, NDA_LINK_NETNSID,
7a0877d4 305 peernet2id_alloc(dev_net(vxlan->dev), vxlan->net)))
193523bf
ND		 306 goto nla_put_failure;
307
e4f67add 308 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
d342894c 309 goto nla_put_failure;
310
e4c7ed41 311 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
6681712d
DS		 312 goto nla_put_failure;
313
0dfbdf41 314 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
6681712d
DS		 315 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
316 goto nla_put_failure;
c7995c43 317 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
54bfd872 318 nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni)))
6681712d
DS		 319 goto nla_put_failure;
320 if (rdst->remote_ifindex &&
321 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
d342894c 322 goto nla_put_failure;
323
324 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
325 ci.ndm_confirmed = 0;
326 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
327 ci.ndm_refcnt = 0;
328
329 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
330 goto nla_put_failure;
331
053c095a
JB		 332 nlmsg_end(skb, nlh);
333 return 0;
d342894c 334
335nla_put_failure:
336 nlmsg_cancel(skb, nlh);
337 return -EMSGSIZE;
338}
339
340static inline size_t vxlan_nlmsg_size(void)
341{
342 return NLMSG_ALIGN(sizeof(struct ndmsg))
343 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
e4c7ed41 344 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
73cf3317 345 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
6681712d
DS		 346 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
347 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
4967082b 348 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
d342894c 349 + nla_total_size(sizeof(struct nda_cacheinfo));
350}
351
9e4b93f9
ND		 352static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
353 struct vxlan_rdst *rd, int type)
d342894c 354{
355 struct net *net = dev_net(vxlan->dev);
356 struct sk_buff *skb;
357 int err = -ENOBUFS;
358
359 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
360 if (skb == NULL)
361 goto errout;
362
9e4b93f9 363 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
d342894c 364 if (err < 0) {
365 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
366 WARN_ON(err == -EMSGSIZE);
367 kfree_skb(skb);
368 goto errout;
369 }
370
371 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
372 return;
373errout:
374 if (err < 0)
375 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
376}
377
e4c7ed41 378static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
e4f67add
DS		 379{
380 struct vxlan_dev *vxlan = netdev_priv(dev);
bb3fd687
SH		 381 struct vxlan_fdb f = {
382 .state = NUD_STALE,
383 };
384 struct vxlan_rdst remote = {
e4c7ed41 385 .remote_ip = *ipa, /* goes to NDA_DST */
54bfd872 386 .remote_vni = cpu_to_be32(VXLAN_N_VID),
bb3fd687 387 };
3e61aa8f 388
9e4b93f9 389 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 390}
391
392static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
393{
bb3fd687
SH		 394 struct vxlan_fdb f = {
395 .state = NUD_STALE,
396 };
9e4b93f9 397 struct vxlan_rdst remote = { };
e4f67add 398
e4f67add
DS		 399 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
400
9e4b93f9 401 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 402}
403
d342894c 404/* Hash Ethernet address */
405static u32 eth_hash(const unsigned char *addr)
406{
407 u64 value = get_unaligned((u64 *)addr);
408
409 /* only want 6 bytes */
410#ifdef __BIG_ENDIAN
d342894c 411 value >>= 16;
321fb991 412#else
413 value <<= 16;
d342894c 414#endif
415 return hash_64(value, FDB_HASH_BITS);
416}
417
418/* Hash chain to use given mac address */
419static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
420 const u8 *mac)
421{
422 return &vxlan->fdb_head[eth_hash(mac)];
423}
424
425/* Look up Ethernet address in forwarding table */
014be2c8 426static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
d342894c 427 const u8 *mac)
d342894c 428{
429 struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
430 struct vxlan_fdb *f;
d342894c 431
b67bfe0d 432 hlist_for_each_entry_rcu(f, head, hlist) {
7367d0b5 433 if (ether_addr_equal(mac, f->eth_addr))
d342894c 434 return f;
435 }
436
437 return NULL;
438}
439
014be2c8
SS		 440static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
441 const u8 *mac)
442{
443 struct vxlan_fdb *f;
444
445 f = __vxlan_find_mac(vxlan, mac);
446 if (f)
447 f->used = jiffies;
448
449 return f;
450}
451
a5e7c10a
MR		 452/* caller should hold vxlan->hash_lock */
453static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
e4c7ed41 454 union vxlan_addr *ip, __be16 port,
54bfd872 455 __be32 vni, __u32 ifindex)
6681712d 456{
3e61aa8f 457 struct vxlan_rdst *rd;
6681712d 458
3e61aa8f 459 list_for_each_entry(rd, &f->remotes, list) {
e4c7ed41 460 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
6681712d
DS		 461 rd->remote_port == port &&
462 rd->remote_vni == vni &&
463 rd->remote_ifindex == ifindex)
a5e7c10a 464 return rd;
6681712d 465 }
3e61aa8f 466
a5e7c10a
MR		 467 return NULL;
468}
469
906dc186
TR		 470/* Replace destination of unicast mac */
471static int vxlan_fdb_replace(struct vxlan_fdb *f,
54bfd872
JB		 472 union vxlan_addr *ip, __be16 port, __be32 vni,
473 __u32 ifindex)
906dc186
TR		 474{
475 struct vxlan_rdst *rd;
476
477 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
478 if (rd)
479 return 0;
480
481 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
482 if (!rd)
483 return 0;
0c1d70af
PA		 484
485 dst_cache_reset(&rd->dst_cache);
e4c7ed41 486 rd->remote_ip = *ip;
906dc186
TR		 487 rd->remote_port = port;
488 rd->remote_vni = vni;
489 rd->remote_ifindex = ifindex;
490 return 1;
491}
492
a5e7c10a
MR		 493/* Add/update destinations for multicast */
494static int vxlan_fdb_append(struct vxlan_fdb *f,
54bfd872 495 union vxlan_addr *ip, __be16 port, __be32 vni,
9e4b93f9 496 __u32 ifindex, struct vxlan_rdst **rdp)
a5e7c10a
MR		 497{
498 struct vxlan_rdst *rd;
499
500 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
501 if (rd)
502 return 0;
503
6681712d
DS		 504 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
505 if (rd == NULL)
506 return -ENOBUFS;
0c1d70af
PA		 507
508 if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) {
509 kfree(rd);
510 return -ENOBUFS;
511 }
512
e4c7ed41 513 rd->remote_ip = *ip;
6681712d
DS		 514 rd->remote_port = port;
515 rd->remote_vni = vni;
516 rd->remote_ifindex = ifindex;
3e61aa8f
SH		 517
518 list_add_tail_rcu(&rd->list, &f->remotes);
519
9e4b93f9 520 *rdp = rd;
6681712d
DS		 521 return 1;
522}
523
dfd8645e
TH		 524static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
525 unsigned int off,
526 struct vxlanhdr *vh, size_t hdrlen,
54bfd872
JB		 527 __be32 vni_field,
528 struct gro_remcsum *grc,
0ace2ca8 529 bool nopartial)
dfd8645e 530{
b7fe10e5 531 size_t start, offset;
dfd8645e
TH		 532
533 if (skb->remcsum_offload)
b7fe10e5 534 return vh;
dfd8645e
TH		 535
536 if (!NAPI_GRO_CB(skb)->csum_valid)
537 return NULL;
538
54bfd872
JB		 539 start = vxlan_rco_start(vni_field);
540 offset = start + vxlan_rco_offset(vni_field);
dfd8645e 541
b7fe10e5
TH		 542 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
543 start, offset, grc, nopartial);
dfd8645e
TH		 544
545 skb->remcsum_offload = 1;
546
547 return vh;
548}
549
a2b12f3c
TH		 550static struct sk_buff **vxlan_gro_receive(struct sk_buff **head,
551 struct sk_buff *skb,
552 struct udp_offload *uoff)
dc01e7d3
OG		 553{
554 struct sk_buff *p, **pp = NULL;
555 struct vxlanhdr *vh, *vh2;
9b174d88 556 unsigned int hlen, off_vx;
dc01e7d3 557 int flush = 1;
dfd8645e
TH		 558 struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock,
559 udp_offloads);
54bfd872 560 __be32 flags;
26c4f7da
TH		 561 struct gro_remcsum grc;
562
563 skb_gro_remcsum_init(&grc);
dc01e7d3
OG		 564
565 off_vx = skb_gro_offset(skb);
566 hlen = off_vx + sizeof(*vh);
567 vh = skb_gro_header_fast(skb, off_vx);
568 if (skb_gro_header_hard(skb, hlen)) {
569 vh = skb_gro_header_slow(skb, hlen, off_vx);
570 if (unlikely(!vh))
571 goto out;
572 }
dc01e7d3 573
dfd8645e
TH		 574 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
575
54bfd872 576 flags = vh->vx_flags;
dfd8645e
TH		 577
578 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
579 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
54bfd872 580 vh->vx_vni, &grc,
0ace2ca8
TH		 581 !!(vs->flags &
582 VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 583
584 if (!vh)
585 goto out;
586 }
587
b7fe10e5
TH		 588 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
589
dc01e7d3
OG		 590 flush = 0;
591
592 for (p = *head; p; p = p->next) {
593 if (!NAPI_GRO_CB(p)->same_flow)
594 continue;
595
596 vh2 = (struct vxlanhdr *)(p->data + off_vx);
3511494c
TG		 597 if (vh->vx_flags != vh2->vx_flags ||
598 vh->vx_vni != vh2->vx_vni) {
dc01e7d3
OG		 599 NAPI_GRO_CB(p)->same_flow = 0;
600 continue;
601 }
dc01e7d3
OG		 602 }
603
9b174d88 604 pp = eth_gro_receive(head, skb);
dc01e7d3 605
dc01e7d3 606out:
26c4f7da 607 skb_gro_remcsum_cleanup(skb, &grc);
dc01e7d3
OG		 608 NAPI_GRO_CB(skb)->flush |= flush;
609
610 return pp;
611}
612
a2b12f3c
TH		 613static int vxlan_gro_complete(struct sk_buff *skb, int nhoff,
614 struct udp_offload *uoff)
dc01e7d3 615{
cfdf1e1b
JG		 616 udp_tunnel_gro_complete(skb, nhoff);
617
9b174d88 618 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
dc01e7d3
OG		 619}
620
53cf5275 621/* Notify netdevs that UDP port started listening */
dc01e7d3 622static void vxlan_notify_add_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 623{
624 struct net_device *dev;
dc01e7d3 625 struct sock *sk = vs->sock->sk;
53cf5275 626 struct net *net = sock_net(sk);
705cc62f 627 sa_family_t sa_family = vxlan_get_sk_family(vs);
35e42379 628 __be16 port = inet_sk(sk)->inet_sport;
dc01e7d3
OG		 629 int err;
630
631 if (sa_family == AF_INET) {
787d7ac3 632 err = udp_add_offload(net, &vs->udp_offloads);
dc01e7d3
OG		 633 if (err)
634 pr_warn("vxlan: udp_add_offload failed with status %d\n", err);
635 }
53cf5275
JG		 636
637 rcu_read_lock();
638 for_each_netdev_rcu(net, dev) {
639 if (dev->netdev_ops->ndo_add_vxlan_port)
640 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
641 port);
642 }
643 rcu_read_unlock();
644}
645
646/* Notify netdevs that UDP port is no more listening */
dc01e7d3 647static void vxlan_notify_del_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 648{
649 struct net_device *dev;
dc01e7d3 650 struct sock *sk = vs->sock->sk;
53cf5275 651 struct net *net = sock_net(sk);
705cc62f 652 sa_family_t sa_family = vxlan_get_sk_family(vs);
35e42379 653 __be16 port = inet_sk(sk)->inet_sport;
53cf5275
JG		 654
655 rcu_read_lock();
656 for_each_netdev_rcu(net, dev) {
657 if (dev->netdev_ops->ndo_del_vxlan_port)
658 dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family,
659 port);
660 }
661 rcu_read_unlock();
dc01e7d3
OG		 662
663 if (sa_family == AF_INET)
664 udp_del_offload(&vs->udp_offloads);
53cf5275
JG		 665}
666
d342894c 667/* Add new entry to forwarding table -- assumes lock held */
668static int vxlan_fdb_create(struct vxlan_dev *vxlan,
e4c7ed41 669 const u8 *mac, union vxlan_addr *ip,
6681712d 670 __u16 state, __u16 flags,
54bfd872 671 __be16 port, __be32 vni, __u32 ifindex,
ae884082 672 __u8 ndm_flags)
d342894c 673{
9e4b93f9 674 struct vxlan_rdst *rd = NULL;
d342894c 675 struct vxlan_fdb *f;
676 int notify = 0;
677
014be2c8 678 f = __vxlan_find_mac(vxlan, mac);
d342894c 679 if (f) {
680 if (flags & NLM_F_EXCL) {
681 netdev_dbg(vxlan->dev,
682 "lost race to create %pM\n", mac);
683 return -EEXIST;
684 }
685 if (f->state != state) {
686 f->state = state;
687 f->updated = jiffies;
688 notify = 1;
689 }
ae884082
DS		 690 if (f->flags != ndm_flags) {
691 f->flags = ndm_flags;
692 f->updated = jiffies;
693 notify = 1;
694 }
906dc186
TR		 695 if ((flags & NLM_F_REPLACE)) {
696 /* Only change unicasts */
697 if (!(is_multicast_ether_addr(f->eth_addr) ||
698 is_zero_ether_addr(f->eth_addr))) {
60840429 699 notify |= vxlan_fdb_replace(f, ip, port, vni,
906dc186 700 ifindex);
906dc186
TR		 701 } else
702 return -EOPNOTSUPP;
703 }
6681712d 704 if ((flags & NLM_F_APPEND) &&
58e4c767
MR		 705 (is_multicast_ether_addr(f->eth_addr) ||
706 is_zero_ether_addr(f->eth_addr))) {
9e4b93f9
ND		 707 int rc = vxlan_fdb_append(f, ip, port, vni, ifindex,
708 &rd);
6681712d
DS		 709
710 if (rc < 0)
711 return rc;
712 notify |= rc;
713 }
d342894c 714 } else {
715 if (!(flags & NLM_F_CREATE))
716 return -ENOENT;
717
0dfbdf41
TG		 718 if (vxlan->cfg.addrmax &&
719 vxlan->addrcnt >= vxlan->cfg.addrmax)
d342894c 720 return -ENOSPC;
721
906dc186
TR		 722 /* Disallow replace to add a multicast entry */
723 if ((flags & NLM_F_REPLACE) &&
724 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
725 return -EOPNOTSUPP;
726
e4c7ed41 727 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
d342894c 728 f = kmalloc(sizeof(*f), GFP_ATOMIC);
729 if (!f)
730 return -ENOMEM;
731
732 notify = 1;
d342894c 733 f->state = state;
ae884082 734 f->flags = ndm_flags;
d342894c 735 f->updated = f->used = jiffies;
3e61aa8f 736 INIT_LIST_HEAD(&f->remotes);
d342894c 737 memcpy(f->eth_addr, mac, ETH_ALEN);
738
9e4b93f9 739 vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
3e61aa8f 740
d342894c 741 ++vxlan->addrcnt;
742 hlist_add_head_rcu(&f->hlist,
743 vxlan_fdb_head(vxlan, mac));
744 }
745
9e4b93f9
ND		 746 if (notify) {
747 if (rd == NULL)
748 rd = first_remote_rtnl(f);
749 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
750 }
d342894c 751
752 return 0;
753}
754
6706c82e 755static void vxlan_fdb_free(struct rcu_head *head)
6681712d
DS		 756{
757 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
3e61aa8f 758 struct vxlan_rdst *rd, *nd;
6681712d 759
0c1d70af
PA		 760 list_for_each_entry_safe(rd, nd, &f->remotes, list) {
761 dst_cache_destroy(&rd->dst_cache);
6681712d 762 kfree(rd);
0c1d70af 763 }
6681712d
DS		 764 kfree(f);
765}
766
d342894c 767static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
768{
769 netdev_dbg(vxlan->dev,
770 "delete %pM\n", f->eth_addr);
771
772 --vxlan->addrcnt;
9e4b93f9 773 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
d342894c 774
775 hlist_del_rcu(&f->hlist);
6681712d 776 call_rcu(&f->rcu, vxlan_fdb_free);
d342894c 777}
778
f0b074be 779static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
54bfd872
JB		 780 union vxlan_addr *ip, __be16 *port, __be32 *vni,
781 u32 *ifindex)
d342894c 782{
6681712d 783 struct net *net = dev_net(vxlan->dev);
e4c7ed41 784 int err;
d342894c 785
f0b074be 786 if (tb[NDA_DST]) {
e4c7ed41
CW		 787 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
788 if (err)
789 return err;
f0b074be 790 } else {
e4c7ed41
CW		 791 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
792 if (remote->sa.sa_family == AF_INET) {
793 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
794 ip->sa.sa_family = AF_INET;
795#if IS_ENABLED(CONFIG_IPV6)
796 } else {
797 ip->sin6.sin6_addr = in6addr_any;
798 ip->sa.sa_family = AF_INET6;
799#endif
800 }
f0b074be 801 }
d342894c 802
6681712d 803 if (tb[NDA_PORT]) {
73cf3317 804 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
6681712d 805 return -EINVAL;
f0b074be
MR		 806 *port = nla_get_be16(tb[NDA_PORT]);
807 } else {
0dfbdf41 808 *port = vxlan->cfg.dst_port;
f0b074be 809 }
6681712d
DS		 810
811 if (tb[NDA_VNI]) {
812 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
813 return -EINVAL;
54bfd872 814 *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
f0b074be
MR		 815 } else {
816 *vni = vxlan->default_dst.remote_vni;
817 }
6681712d
DS		 818
819 if (tb[NDA_IFINDEX]) {
5abb0029 820 struct net_device *tdev;
6681712d
DS		 821
822 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
823 return -EINVAL;
f0b074be 824 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
73763949 825 tdev = __dev_get_by_index(net, *ifindex);
5abb0029 826 if (!tdev)
6681712d 827 return -EADDRNOTAVAIL;
f0b074be
MR		 828 } else {
829 *ifindex = 0;
830 }
831
832 return 0;
833}
834
835/* Add static entry (via netlink) */
836static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
837 struct net_device *dev,
f6f6424b 838 const unsigned char *addr, u16 vid, u16 flags)
f0b074be
MR		 839{
840 struct vxlan_dev *vxlan = netdev_priv(dev);
841 /* struct net *net = dev_net(vxlan->dev); */
e4c7ed41 842 union vxlan_addr ip;
f0b074be 843 __be16 port;
54bfd872
JB		 844 __be32 vni;
845 u32 ifindex;
f0b074be
MR		 846 int err;
847
848 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
849 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
850 ndm->ndm_state);
851 return -EINVAL;
852 }
853
854 if (tb[NDA_DST] == NULL)
855 return -EINVAL;
856
857 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
858 if (err)
859 return err;
6681712d 860
5933a7bb
MR		 861 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
862 return -EAFNOSUPPORT;
863
d342894c 864 spin_lock_bh(&vxlan->hash_lock);
e4c7ed41 865 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
73cf3317 866 port, vni, ifindex, ndm->ndm_flags);
d342894c 867 spin_unlock_bh(&vxlan->hash_lock);
868
869 return err;
870}
871
872/* Delete entry (via netlink) */
1690be63
VY		 873static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
874 struct net_device *dev,
f6f6424b 875 const unsigned char *addr, u16 vid)
d342894c 876{
877 struct vxlan_dev *vxlan = netdev_priv(dev);
878 struct vxlan_fdb *f;
bc7892ba 879 struct vxlan_rdst *rd = NULL;
e4c7ed41 880 union vxlan_addr ip;
bc7892ba 881 __be16 port;
54bfd872
JB		 882 __be32 vni;
883 u32 ifindex;
bc7892ba
MR		 884 int err;
885
886 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
887 if (err)
888 return err;
889
890 err = -ENOENT;
d342894c 891
892 spin_lock_bh(&vxlan->hash_lock);
893 f = vxlan_find_mac(vxlan, addr);
bc7892ba
MR		 894 if (!f)
895 goto out;
896
e4c7ed41
CW		 897 if (!vxlan_addr_any(&ip)) {
898 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
bc7892ba
MR		 899 if (!rd)
900 goto out;
901 }
902
903 err = 0;
904
905 /* remove a destination if it's not the only one on the list,
906 * otherwise destroy the fdb entry
907 */
908 if (rd && !list_is_singular(&f->remotes)) {
909 list_del_rcu(&rd->list);
9e4b93f9 910 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
dcdc7a59 911 kfree_rcu(rd, rcu);
bc7892ba 912 goto out;
d342894c 913 }
bc7892ba
MR		 914
915 vxlan_fdb_destroy(vxlan, f);
916
917out:
d342894c 918 spin_unlock_bh(&vxlan->hash_lock);
919
920 return err;
921}
922
923/* Dump forwarding table */
924static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3
JHS		 925 struct net_device *dev,
926 struct net_device *filter_dev, int idx)
d342894c 927{
928 struct vxlan_dev *vxlan = netdev_priv(dev);
929 unsigned int h;
930
931 for (h = 0; h < FDB_HASH_SIZE; ++h) {
932 struct vxlan_fdb *f;
d342894c 933 int err;
934
b67bfe0d 935 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
6681712d 936 struct vxlan_rdst *rd;
6681712d 937
3e61aa8f 938 list_for_each_entry_rcu(rd, &f->remotes, list) {
07a51cd3
AW		 939 if (idx < cb->args[0])
940 goto skip;
941
6681712d
DS		 942 err = vxlan_fdb_info(skb, vxlan, f,
943 NETLINK_CB(cb->skb).portid,
944 cb->nlh->nlmsg_seq,
945 RTM_NEWNEIGH,
946 NLM_F_MULTI, rd);
947 if (err < 0)
3e61aa8f 948 goto out;
3e61aa8f 949skip:
07a51cd3
AW		 950 ++idx;
951 }
d342894c 952 }
953 }
3e61aa8f 954out:
d342894c 955 return idx;
956}
957
958/* Watch incoming packets to learn mapping between Ethernet address
959 * and Tunnel endpoint.
c4b49512 960 * Return true if packet is bogus and should be dropped.
d342894c 961 */
26a41ae6 962static bool vxlan_snoop(struct net_device *dev,
e4c7ed41 963 union vxlan_addr *src_ip, const u8 *src_mac)
d342894c 964{
965 struct vxlan_dev *vxlan = netdev_priv(dev);
966 struct vxlan_fdb *f;
d342894c 967
968 f = vxlan_find_mac(vxlan, src_mac);
969 if (likely(f)) {
5ca5461c 970 struct vxlan_rdst *rdst = first_remote_rcu(f);
3e61aa8f 971
e4c7ed41 972 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip)))
26a41ae6 973 return false;
974
975 /* Don't migrate static entries, drop packets */
eb064c3b 976 if (f->state & NUD_NOARP)
26a41ae6 977 return true;
d342894c 978
979 if (net_ratelimit())
980 netdev_info(dev,
e4c7ed41 981 "%pM migrated from %pIS to %pIS\n",
a4870f79 982 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
d342894c 983
e4c7ed41 984 rdst->remote_ip = *src_ip;
d342894c 985 f->updated = jiffies;
9e4b93f9 986 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
d342894c 987 } else {
988 /* learned new entry */
989 spin_lock(&vxlan->hash_lock);
3bf74b1a 990
991 /* close off race between vxlan_flush and incoming packets */
992 if (netif_running(dev))
993 vxlan_fdb_create(vxlan, src_mac, src_ip,
994 NUD_REACHABLE,
995 NLM_F_EXCL|NLM_F_CREATE,
0dfbdf41 996 vxlan->cfg.dst_port,
3bf74b1a 997 vxlan->default_dst.remote_vni,
998 0, NTF_SELF);
d342894c 999 spin_unlock(&vxlan->hash_lock);
1000 }
26a41ae6 1001
1002 return false;
d342894c 1003}
1004
d342894c 1005/* See if multicast group is already in use by other ID */
95ab0991 1006static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
d342894c 1007{
553675fb 1008 struct vxlan_dev *vxlan;
b1be00a6 1009 unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
d342894c 1010
95ab0991
G		 1011 /* The vxlan_sock is only used by dev, leaving group has
1012 * no effect on other vxlan devices.
1013 */
b1be00a6
JB		 1014 if (family == AF_INET && dev->vn4_sock &&
1015 atomic_read(&dev->vn4_sock->refcnt) == 1)
95ab0991 1016 return false;
b1be00a6
JB		 1017#if IS_ENABLED(CONFIG_IPV6)
1018 if (family == AF_INET6 && dev->vn6_sock &&
1019 atomic_read(&dev->vn6_sock->refcnt) == 1)
1020 return false;
1021#endif
95ab0991 1022
553675fb 1023 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
95ab0991 1024 if (!netif_running(vxlan->dev) || vxlan == dev)
553675fb 1025 continue;
d342894c 1026
b1be00a6 1027 if (family == AF_INET && vxlan->vn4_sock != dev->vn4_sock)
95ab0991 1028 continue;
b1be00a6
JB		 1029#if IS_ENABLED(CONFIG_IPV6)
1030 if (family == AF_INET6 && vxlan->vn6_sock != dev->vn6_sock)
1031 continue;
1032#endif
95ab0991
G		 1033
1034 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1035 &dev->default_dst.remote_ip))
1036 continue;
1037
1038 if (vxlan->default_dst.remote_ifindex !=
1039 dev->default_dst.remote_ifindex)
1040 continue;
1041
1042 return true;
553675fb 1043 }
d342894c 1044
1045 return false;
1046}
1047
b1be00a6 1048static void __vxlan_sock_release(struct vxlan_sock *vs)
7c47cedf 1049{
b1be00a6 1050 struct vxlan_net *vn;
012a5729 1051
b1be00a6
JB		 1052 if (!vs)
1053 return;
7c47cedf
SH		 1054 if (!atomic_dec_and_test(&vs->refcnt))
1055 return;
d342894c 1056
b1be00a6 1057 vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id);
1c51a915 1058 spin_lock(&vn->sock_lock);
7c47cedf 1059 hlist_del_rcu(&vs->hlist);
dc01e7d3 1060 vxlan_notify_del_rx_port(vs);
1c51a915
SH		 1061 spin_unlock(&vn->sock_lock);
1062
7c47cedf 1063 queue_work(vxlan_wq, &vs->del_work);
d342894c 1064}
1065
b1be00a6
JB		 1066static void vxlan_sock_release(struct vxlan_dev *vxlan)
1067{
1068 __vxlan_sock_release(vxlan->vn4_sock);
1069#if IS_ENABLED(CONFIG_IPV6)
1070 __vxlan_sock_release(vxlan->vn6_sock);
1071#endif
1072}
1073
56ef9c90 1074/* Update multicast group membership when first VNI on
c4b49512 1075 * multicast address is brought up
7c47cedf 1076 */
56ef9c90 1077static int vxlan_igmp_join(struct vxlan_dev *vxlan)
d342894c 1078{
b1be00a6 1079 struct sock *sk;
e4c7ed41
CW		 1080 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1081 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1082 int ret = -EINVAL;
d342894c 1083
e4c7ed41
CW		 1084 if (ip->sa.sa_family == AF_INET) {
1085 struct ip_mreqn mreq = {
1086 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1087 .imr_ifindex = ifindex,
1088 };
1089
b1be00a6
JB		 1090 sk = vxlan->vn4_sock->sock->sk;
1091 lock_sock(sk);
56ef9c90 1092 ret = ip_mc_join_group(sk, &mreq);
b1be00a6 1093 release_sock(sk);
e4c7ed41
CW		 1094#if IS_ENABLED(CONFIG_IPV6)
1095 } else {
b1be00a6
JB		 1096 sk = vxlan->vn6_sock->sock->sk;
1097 lock_sock(sk);
56ef9c90
MRL		 1098 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1099 &ip->sin6.sin6_addr);
b1be00a6 1100 release_sock(sk);
e4c7ed41
CW		 1101#endif
1102 }
3fc2de2f 1103
56ef9c90 1104 return ret;
3fc2de2f 1105}
1106
1107/* Inverse of vxlan_igmp_join when last VNI is brought down */
56ef9c90 1108static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
3fc2de2f 1109{
b1be00a6 1110 struct sock *sk;
e4c7ed41
CW		 1111 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1112 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1113 int ret = -EINVAL;
3fc2de2f 1114
e4c7ed41
CW		 1115 if (ip->sa.sa_family == AF_INET) {
1116 struct ip_mreqn mreq = {
1117 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1118 .imr_ifindex = ifindex,
1119 };
1120
b1be00a6
JB		 1121 sk = vxlan->vn4_sock->sock->sk;
1122 lock_sock(sk);
56ef9c90 1123 ret = ip_mc_leave_group(sk, &mreq);
b1be00a6 1124 release_sock(sk);
e4c7ed41
CW		 1125#if IS_ENABLED(CONFIG_IPV6)
1126 } else {
b1be00a6
JB		 1127 sk = vxlan->vn6_sock->sock->sk;
1128 lock_sock(sk);
56ef9c90
MRL		 1129 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1130 &ip->sin6.sin6_addr);
b1be00a6 1131 release_sock(sk);
e4c7ed41
CW		 1132#endif
1133 }
d342894c 1134
56ef9c90 1135 return ret;
d342894c 1136}
1137
dfd8645e 1138static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh,
54bfd872
JB		 1139 size_t hdrlen, __be32 vni_field,
1140 bool nopartial)
dfd8645e
TH		 1141{
1142 size_t start, offset, plen;
dfd8645e 1143
b7fe10e5
TH		 1144 if (skb->remcsum_offload)
1145 return vh;
1146
54bfd872
JB		 1147 start = vxlan_rco_start(vni_field);
1148 offset = start + vxlan_rco_offset(vni_field);
dfd8645e
TH		 1149
1150 plen = hdrlen + offset + sizeof(u16);
1151
1152 if (!pskb_may_pull(skb, plen))
1153 return NULL;
1154
1155 vh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
1156
0ace2ca8
TH		 1157 skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset,
1158 nopartial);
dfd8645e
TH		 1159
1160 return vh;
1161}
1162
614732ea 1163static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb,
54bfd872 1164 struct vxlan_metadata *md, __be32 vni,
614732ea
TG		 1165 struct metadata_dst *tun_dst)
1166{
1167 struct iphdr *oip = NULL;
1168 struct ipv6hdr *oip6 = NULL;
1169 struct vxlan_dev *vxlan;
1170 struct pcpu_sw_netstats *stats;
1171 union vxlan_addr saddr;
1172 int err = 0;
614732ea
TG		 1173
1174 /* For flow based devices, map all packets to VNI 0 */
da8b43c0 1175 if (vs->flags & VXLAN_F_COLLECT_METADATA)
614732ea
TG		 1176 vni = 0;
1177
1178 /* Is this VNI defined? */
1179 vxlan = vxlan_vs_find_vni(vs, vni);
1180 if (!vxlan)
1181 goto drop;
1182
614732ea
TG		 1183 skb_reset_mac_header(skb);
1184 skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev)));
1185 skb->protocol = eth_type_trans(skb, vxlan->dev);
1186 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1187
1188 /* Ignore packet loops (and multicast echo) */
1189 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
1190 goto drop;
1191
ce212d0f
JB		 1192 /* Get data from the outer IP header */
1193 if (vxlan_get_sk_family(vs) == AF_INET) {
614732ea
TG		 1194 oip = ip_hdr(skb);
1195 saddr.sin.sin_addr.s_addr = oip->saddr;
1196 saddr.sa.sa_family = AF_INET;
1197#if IS_ENABLED(CONFIG_IPV6)
1198 } else {
1199 oip6 = ipv6_hdr(skb);
1200 saddr.sin6.sin6_addr = oip6->saddr;
1201 saddr.sa.sa_family = AF_INET6;
1202#endif
1203 }
1204
1205 if (tun_dst) {
1206 skb_dst_set(skb, (struct dst_entry *)tun_dst);
1207 tun_dst = NULL;
1208 }
1209
1210 if ((vxlan->flags & VXLAN_F_LEARN) &&
1211 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source))
1212 goto drop;
1213
1214 skb_reset_network_header(skb);
1215 /* In flow-based mode, GBP is carried in dst_metadata */
da8b43c0 1216 if (!(vs->flags & VXLAN_F_COLLECT_METADATA))
614732ea
TG		 1217 skb->mark = md->gbp;
1218
1219 if (oip6)
1220 err = IP6_ECN_decapsulate(oip6, skb);
1221 if (oip)
1222 err = IP_ECN_decapsulate(oip, skb);
1223
1224 if (unlikely(err)) {
1225 if (log_ecn_error) {
1226 if (oip6)
1227 net_info_ratelimited("non-ECT from %pI6\n",
1228 &oip6->saddr);
1229 if (oip)
1230 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1231 &oip->saddr, oip->tos);
1232 }
1233 if (err > 1) {
1234 ++vxlan->dev->stats.rx_frame_errors;
1235 ++vxlan->dev->stats.rx_errors;
1236 goto drop;
1237 }
1238 }
1239
1240 stats = this_cpu_ptr(vxlan->dev->tstats);
1241 u64_stats_update_begin(&stats->syncp);
1242 stats->rx_packets++;
1243 stats->rx_bytes += skb->len;
1244 u64_stats_update_end(&stats->syncp);
1245
58ce31cc 1246 gro_cells_receive(&vxlan->gro_cells, skb);
614732ea
TG		 1247
1248 return;
1249drop:
1250 if (tun_dst)
1251 dst_release((struct dst_entry *)tun_dst);
1252
1253 /* Consume bad packet */
1254 kfree_skb(skb);
1255}
1256
d342894c 1257/* Callback from net/ipv4/udp.c to receive packets */
1258static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
1259{
ee122c79 1260 struct metadata_dst *tun_dst = NULL;
5cfccc5a 1261 struct vxlan_sock *vs;
54bfd872 1262 __be32 flags, vni_field;
ee122c79
TG		 1263 struct vxlan_metadata _md;
1264 struct vxlan_metadata *md = &_md;
d342894c 1265
d342894c 1266 /* Need Vxlan and inner Ethernet header to be present */
7ce04758 1267 if (!pskb_may_pull(skb, VXLAN_HLEN))
d342894c 1268 goto error;
1269
54bfd872
JB		 1270 flags = vxlan_hdr(skb)->vx_flags;
1271 vni_field = vxlan_hdr(skb)->vx_vni;
3bf39475
TH		 1272
1273 if (flags & VXLAN_HF_VNI) {
1274 flags &= ~VXLAN_HF_VNI;
1275 } else {
1276 /* VNI flag always required to be set */
1277 goto bad_flags;
d342894c 1278 }
1279
5cfccc5a
PS		 1280 if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB)))
1281 goto drop;
1282
559835ea 1283 vs = rcu_dereference_sk_user_data(sk);
5cfccc5a 1284 if (!vs)
d342894c 1285 goto drop;
d342894c 1286
dfd8645e 1287 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
54bfd872
JB		 1288 if (!vxlan_remcsum(skb, vxlan_hdr(skb), sizeof(struct vxlanhdr),
1289 vni_field,
d4ac05ff 1290 !!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL)))
dfd8645e
TH		 1291 goto drop;
1292
1293 flags &= ~VXLAN_HF_RCO;
54bfd872 1294 vni_field &= VXLAN_VNI_MASK;
dfd8645e
TH		 1295 }
1296
ee122c79 1297 if (vxlan_collect_metadata(vs)) {
c29a70d2 1298 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
54bfd872 1299 vxlan_vni(vni_field), sizeof(*md));
c29a70d2 1300
ee122c79
TG		 1301 if (!tun_dst)
1302 goto drop;
1303
0f1b7354 1304 md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
ee122c79
TG		 1305 } else {
1306 memset(md, 0, sizeof(*md));
1307 }
1308
3511494c
TG		 1309 /* For backwards compatibility, only allow reserved fields to be
1310 * used by VXLAN extensions if explicitly requested.
1311 */
1312 if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) {
1313 struct vxlanhdr_gbp *gbp;
1314
d4ac05ff 1315 gbp = (struct vxlanhdr_gbp *)vxlan_hdr(skb);
ee122c79
TG		 1316 md->gbp = ntohs(gbp->policy_id);
1317
1318 if (tun_dst)
0f1b7354 1319 tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
3511494c
TG		 1320
1321 if (gbp->dont_learn)
ee122c79 1322 md->gbp |= VXLAN_GBP_DONT_LEARN;
3511494c
TG		 1323
1324 if (gbp->policy_applied)
ee122c79 1325 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
3511494c
TG		 1326
1327 flags &= ~VXLAN_GBP_USED_BITS;
1328 }
1329
54bfd872 1330 if (flags || vni_field & ~VXLAN_VNI_MASK) {
3bf39475
TH		 1331 /* If there are any unprocessed flags remaining treat
1332 * this as a malformed packet. This behavior diverges from
1333 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1334 * in reserved fields are to be ignored. The approach here
c4b49512 1335 * maintains compatibility with previous stack code, and also
3bf39475
TH		 1336 * is more robust and provides a little more security in
1337 * adding extensions to VXLAN.
1338 */
1339
1340 goto bad_flags;
1341 }
1342
54bfd872 1343 vxlan_rcv(vs, skb, md, vxlan_vni(vni_field), tun_dst);
5cfccc5a
PS		 1344 return 0;
1345
1346drop:
1347 /* Consume bad packet */
1348 kfree_skb(skb);
1349 return 0;
1350
3bf39475
TH		 1351bad_flags:
1352 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
d4ac05ff
JB		 1353 ntohl(vxlan_hdr(skb)->vx_flags),
1354 ntohl(vxlan_hdr(skb)->vx_vni));
3bf39475 1355
5cfccc5a 1356error:
ee122c79
TG		 1357 if (tun_dst)
1358 dst_release((struct dst_entry *)tun_dst);
1359
5cfccc5a
PS		 1360 /* Return non vxlan pkt */
1361 return 1;
1362}
1363
e4f67add
DS		 1364static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
1365{
1366 struct vxlan_dev *vxlan = netdev_priv(dev);
1367 struct arphdr *parp;
1368 u8 *arpptr, *sha;
1369 __be32 sip, tip;
1370 struct neighbour *n;
1371
1372 if (dev->flags & IFF_NOARP)
1373 goto out;
1374
1375 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1376 dev->stats.tx_dropped++;
1377 goto out;
1378 }
1379 parp = arp_hdr(skb);
1380
1381 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1382 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1383 parp->ar_pro != htons(ETH_P_IP) ||
1384 parp->ar_op != htons(ARPOP_REQUEST) ||
1385 parp->ar_hln != dev->addr_len ||
1386 parp->ar_pln != 4)
1387 goto out;
1388 arpptr = (u8 *)parp + sizeof(struct arphdr);
1389 sha = arpptr;
1390 arpptr += dev->addr_len; /* sha */
1391 memcpy(&sip, arpptr, sizeof(sip));
1392 arpptr += sizeof(sip);
1393 arpptr += dev->addr_len; /* tha */
1394 memcpy(&tip, arpptr, sizeof(tip));
1395
1396 if (ipv4_is_loopback(tip) ||
1397 ipv4_is_multicast(tip))
1398 goto out;
1399
1400 n = neigh_lookup(&arp_tbl, &tip, dev);
1401
1402 if (n) {
e4f67add
DS		 1403 struct vxlan_fdb *f;
1404 struct sk_buff *reply;
1405
1406 if (!(n->nud_state & NUD_CONNECTED)) {
1407 neigh_release(n);
1408 goto out;
1409 }
1410
1411 f = vxlan_find_mac(vxlan, n->ha);
e4c7ed41 1412 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
e4f67add
DS		 1413 /* bridge-local neighbor */
1414 neigh_release(n);
1415 goto out;
1416 }
1417
1418 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1419 n->ha, sha);
1420
1421 neigh_release(n);
1422
7346135d
DS		 1423 if (reply == NULL)
1424 goto out;
1425
e4f67add
DS		 1426 skb_reset_mac_header(reply);
1427 __skb_pull(reply, skb_network_offset(reply));
1428 reply->ip_summed = CHECKSUM_UNNECESSARY;
1429 reply->pkt_type = PACKET_HOST;
1430
1431 if (netif_rx_ni(reply) == NET_RX_DROP)
1432 dev->stats.rx_dropped++;
e4c7ed41
CW		 1433 } else if (vxlan->flags & VXLAN_F_L3MISS) {
1434 union vxlan_addr ipa = {
1435 .sin.sin_addr.s_addr = tip,
a45e92a5 1436 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1437 };
1438
1439 vxlan_ip_miss(dev, &ipa);
1440 }
e4f67add
DS		 1441out:
1442 consume_skb(skb);
1443 return NETDEV_TX_OK;
1444}
1445
f564f45c 1446#if IS_ENABLED(CONFIG_IPV6)
4b29dba9
DS		 1447static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1448 struct neighbour *n, bool isrouter)
1449{
1450 struct net_device *dev = request->dev;
1451 struct sk_buff *reply;
1452 struct nd_msg *ns, *na;
1453 struct ipv6hdr *pip6;
1454 u8 *daddr;
1455 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1456 int ns_olen;
1457 int i, len;
1458
1459 if (dev == NULL)
1460 return NULL;
1461
1462 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1463 sizeof(*na) + na_olen + dev->needed_tailroom;
1464 reply = alloc_skb(len, GFP_ATOMIC);
1465 if (reply == NULL)
1466 return NULL;
1467
1468 reply->protocol = htons(ETH_P_IPV6);
1469 reply->dev = dev;
1470 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1471 skb_push(reply, sizeof(struct ethhdr));
1472 skb_set_mac_header(reply, 0);
1473
1474 ns = (struct nd_msg *)skb_transport_header(request);
1475
1476 daddr = eth_hdr(request)->h_source;
1477 ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns);
1478 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1479 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1480 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1481 break;
1482 }
1483 }
1484
1485 /* Ethernet header */
1486 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1487 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1488 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1489 reply->protocol = htons(ETH_P_IPV6);
1490
1491 skb_pull(reply, sizeof(struct ethhdr));
1492 skb_set_network_header(reply, 0);
1493 skb_put(reply, sizeof(struct ipv6hdr));
1494
1495 /* IPv6 header */
1496
1497 pip6 = ipv6_hdr(reply);
1498 memset(pip6, 0, sizeof(struct ipv6hdr));
1499 pip6->version = 6;
1500 pip6->priority = ipv6_hdr(request)->priority;
1501 pip6->nexthdr = IPPROTO_ICMPV6;
1502 pip6->hop_limit = 255;
1503 pip6->daddr = ipv6_hdr(request)->saddr;
1504 pip6->saddr = *(struct in6_addr *)n->primary_key;
1505
1506 skb_pull(reply, sizeof(struct ipv6hdr));
1507 skb_set_transport_header(reply, 0);
1508
1509 na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen);
1510
1511 /* Neighbor Advertisement */
1512 memset(na, 0, sizeof(*na)+na_olen);
1513 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1514 na->icmph.icmp6_router = isrouter;
1515 na->icmph.icmp6_override = 1;
1516 na->icmph.icmp6_solicited = 1;
1517 na->target = ns->target;
1518 ether_addr_copy(&na->opt[2], n->ha);
1519 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1520 na->opt[1] = na_olen >> 3;
1521
1522 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1523 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1524 csum_partial(na, sizeof(*na)+na_olen, 0));
1525
1526 pip6->payload_len = htons(sizeof(*na)+na_olen);
1527
1528 skb_push(reply, sizeof(struct ipv6hdr));
1529
1530 reply->ip_summed = CHECKSUM_UNNECESSARY;
1531
1532 return reply;
1533}
1534
f564f45c
CW		 1535static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
1536{
1537 struct vxlan_dev *vxlan = netdev_priv(dev);
4b29dba9 1538 struct nd_msg *msg;
f564f45c
CW		 1539 const struct ipv6hdr *iphdr;
1540 const struct in6_addr *saddr, *daddr;
4b29dba9
DS		 1541 struct neighbour *n;
1542 struct inet6_dev *in6_dev;
f564f45c
CW		 1543
1544 in6_dev = __in6_dev_get(dev);
1545 if (!in6_dev)
1546 goto out;
1547
f564f45c
CW		 1548 iphdr = ipv6_hdr(skb);
1549 saddr = &iphdr->saddr;
1550 daddr = &iphdr->daddr;
1551
f564f45c
CW		 1552 msg = (struct nd_msg *)skb_transport_header(skb);
1553 if (msg->icmph.icmp6_code != 0 ||
1554 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1555 goto out;
1556
4b29dba9
DS		 1557 if (ipv6_addr_loopback(daddr) ||
1558 ipv6_addr_is_multicast(&msg->target))
1559 goto out;
1560
1561 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
f564f45c
CW		 1562
1563 if (n) {
1564 struct vxlan_fdb *f;
4b29dba9 1565 struct sk_buff *reply;
f564f45c
CW		 1566
1567 if (!(n->nud_state & NUD_CONNECTED)) {
1568 neigh_release(n);
1569 goto out;
1570 }
1571
1572 f = vxlan_find_mac(vxlan, n->ha);
1573 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1574 /* bridge-local neighbor */
1575 neigh_release(n);
1576 goto out;
1577 }
1578
4b29dba9
DS		 1579 reply = vxlan_na_create(skb, n,
1580 !!(f ? f->flags & NTF_ROUTER : 0));
1581
f564f45c 1582 neigh_release(n);
4b29dba9
DS		 1583
1584 if (reply == NULL)
1585 goto out;
1586
1587 if (netif_rx_ni(reply) == NET_RX_DROP)
1588 dev->stats.rx_dropped++;
1589
f564f45c 1590 } else if (vxlan->flags & VXLAN_F_L3MISS) {
4b29dba9
DS		 1591 union vxlan_addr ipa = {
1592 .sin6.sin6_addr = msg->target,
a45e92a5 1593 .sin6.sin6_family = AF_INET6,
4b29dba9
DS		 1594 };
1595
f564f45c
CW		 1596 vxlan_ip_miss(dev, &ipa);
1597 }
1598
1599out:
1600 consume_skb(skb);
1601 return NETDEV_TX_OK;
1602}
1603#endif
1604
e4f67add
DS		 1605static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1606{
1607 struct vxlan_dev *vxlan = netdev_priv(dev);
1608 struct neighbour *n;
e4f67add
DS		 1609
1610 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1611 return false;
1612
1613 n = NULL;
1614 switch (ntohs(eth_hdr(skb)->h_proto)) {
1615 case ETH_P_IP:
e15a00aa
CW		 1616 {
1617 struct iphdr *pip;
1618
e4f67add
DS		 1619 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1620 return false;
1621 pip = ip_hdr(skb);
1622 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
e4c7ed41
CW		 1623 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1624 union vxlan_addr ipa = {
1625 .sin.sin_addr.s_addr = pip->daddr,
a45e92a5 1626 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1627 };
1628
1629 vxlan_ip_miss(dev, &ipa);
1630 return false;
1631 }
1632
e4f67add 1633 break;
e15a00aa
CW		 1634 }
1635#if IS_ENABLED(CONFIG_IPV6)
1636 case ETH_P_IPV6:
1637 {
1638 struct ipv6hdr *pip6;
1639
1640 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1641 return false;
1642 pip6 = ipv6_hdr(skb);
1643 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
1644 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1645 union vxlan_addr ipa = {
1646 .sin6.sin6_addr = pip6->daddr,
a45e92a5 1647 .sin6.sin6_family = AF_INET6,
e15a00aa
CW		 1648 };
1649
1650 vxlan_ip_miss(dev, &ipa);
1651 return false;
1652 }
1653
1654 break;
1655 }
1656#endif
e4f67add
DS		 1657 default:
1658 return false;
1659 }
1660
1661 if (n) {
1662 bool diff;
1663
7367d0b5 1664 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
e4f67add
DS		 1665 if (diff) {
1666 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1667 dev->addr_len);
1668 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1669 }
1670 neigh_release(n);
1671 return diff;
e4c7ed41
CW		 1672 }
1673
e4f67add
DS		 1674 return false;
1675}
1676
af33c1ad 1677static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
3511494c
TG		 1678 struct vxlan_metadata *md)
1679{
1680 struct vxlanhdr_gbp *gbp;
1681
db79a621
TG		 1682 if (!md->gbp)
1683 return;
1684
3511494c 1685 gbp = (struct vxlanhdr_gbp *)vxh;
54bfd872 1686 vxh->vx_flags |= VXLAN_HF_GBP;
3511494c
TG		 1687
1688 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1689 gbp->dont_learn = 1;
1690
1691 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1692 gbp->policy_applied = 1;
1693
1694 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1695}
1696
f491e56d
JB		 1697static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
1698 int iphdr_len, __be32 vni,
1699 struct vxlan_metadata *md, u32 vxflags,
b4ed5cad 1700 bool udp_sum)
e4c7ed41 1701{
e4c7ed41 1702 struct vxlanhdr *vxh;
e4c7ed41
CW		 1703 int min_headroom;
1704 int err;
dfd8645e 1705 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
dfd8645e 1706
af33c1ad 1707 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1708 skb->ip_summed == CHECKSUM_PARTIAL) {
1709 int csum_start = skb_checksum_start_offset(skb);
1710
1711 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1712 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1713 (skb->csum_offset == offsetof(struct udphdr, check) ||
b5708501 1714 skb->csum_offset == offsetof(struct tcphdr, check)))
dfd8645e 1715 type |= SKB_GSO_TUNNEL_REMCSUM;
dfd8645e 1716 }
e4c7ed41 1717
e4c7ed41 1718 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
f491e56d 1719 + VXLAN_HLEN + iphdr_len
df8a39de 1720 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
649c5b8b
PS		 1721
1722 /* Need space for new headers (invalidates iph ptr) */
1723 err = skb_cow_head(skb, min_headroom);
74f47278
PS		 1724 if (unlikely(err)) {
1725 kfree_skb(skb);
649c5b8b 1726 return err;
74f47278 1727 }
649c5b8b 1728
5968250c
JP		 1729 skb = vlan_hwaccel_push_inside(skb);
1730 if (WARN_ON(!skb))
1731 return -ENOMEM;
1eaa8178 1732
6fa79666 1733 skb = iptunnel_handle_offloads(skb, type);
b736a623
JG		 1734 if (IS_ERR(skb))
1735 return PTR_ERR(skb);
1736
49560532 1737 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
54bfd872
JB		 1738 vxh->vx_flags = VXLAN_HF_VNI;
1739 vxh->vx_vni = vxlan_vni_field(vni);
49560532 1740
dfd8645e 1741 if (type & SKB_GSO_TUNNEL_REMCSUM) {
54bfd872 1742 unsigned int start;
dfd8645e 1743
54bfd872
JB		 1744 start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr);
1745 vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset);
1746 vxh->vx_flags |= VXLAN_HF_RCO;
dfd8645e
TH		 1747
1748 if (!skb_is_gso(skb)) {
1749 skb->ip_summed = CHECKSUM_NONE;
1750 skb->encapsulation = 0;
1751 }
1752 }
1753
af33c1ad
TH		 1754 if (vxflags & VXLAN_F_GBP)
1755 vxlan_build_gbp_hdr(vxh, vxflags, md);
3511494c 1756
996c9fd1 1757 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
039f5062 1758 return 0;
49560532 1759}
49560532 1760
1a8496ba
JB		 1761static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan,
1762 struct sk_buff *skb, int oif, u8 tos,
0c1d70af
PA		 1763 __be32 daddr, __be32 *saddr,
1764 struct dst_cache *dst_cache,
1765 struct ip_tunnel_info *info)
1a8496ba
JB		 1766{
1767 struct rtable *rt = NULL;
0c1d70af 1768 bool use_cache = false;
1a8496ba
JB		 1769 struct flowi4 fl4;
1770
0c1d70af
PA		 1771 /* when the ip_tunnel_info is availble, the tos used for lookup is
1772 * packet independent, so we can use the cache
1773 */
d71785ff 1774 if (!skb->mark && (!tos || info)) {
0c1d70af
PA		 1775 use_cache = true;
1776 rt = dst_cache_get_ip4(dst_cache, saddr);
1777 if (rt)
1778 return rt;
1779 }
1780
1a8496ba
JB		 1781 memset(&fl4, 0, sizeof(fl4));
1782 fl4.flowi4_oif = oif;
1783 fl4.flowi4_tos = RT_TOS(tos);
1784 fl4.flowi4_mark = skb->mark;
1785 fl4.flowi4_proto = IPPROTO_UDP;
1786 fl4.daddr = daddr;
1787 fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr;
1788
1789 rt = ip_route_output_key(vxlan->net, &fl4);
0c1d70af 1790 if (!IS_ERR(rt)) {
1a8496ba 1791 *saddr = fl4.saddr;
0c1d70af
PA		 1792 if (use_cache)
1793 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
1794 }
1a8496ba
JB		 1795 return rt;
1796}
1797
e5d4b29f
JB		 1798#if IS_ENABLED(CONFIG_IPV6)
1799static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
1800 struct sk_buff *skb, int oif,
1801 const struct in6_addr *daddr,
0c1d70af
PA		 1802 struct in6_addr *saddr,
1803 struct dst_cache *dst_cache)
e5d4b29f
JB		 1804{
1805 struct dst_entry *ndst;
1806 struct flowi6 fl6;
1807 int err;
1808
d71785ff 1809 if (!skb->mark) {
0c1d70af
PA		 1810 ndst = dst_cache_get_ip6(dst_cache, saddr);
1811 if (ndst)
1812 return ndst;
1813 }
1814
e5d4b29f
JB		 1815 memset(&fl6, 0, sizeof(fl6));
1816 fl6.flowi6_oif = oif;
1817 fl6.daddr = *daddr;
1818 fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr;
1819 fl6.flowi6_mark = skb->mark;
1820 fl6.flowi6_proto = IPPROTO_UDP;
1821
1822 err = ipv6_stub->ipv6_dst_lookup(vxlan->net,
1823 vxlan->vn6_sock->sock->sk,
1824 &ndst, &fl6);
1825 if (err < 0)
1826 return ERR_PTR(err);
1827
1828 *saddr = fl6.saddr;
d71785ff 1829 if (!skb->mark)
0c1d70af 1830 dst_cache_set_ip6(dst_cache, ndst, saddr);
e5d4b29f
JB		 1831 return ndst;
1832}
1833#endif
1834
9dcc71e1
SS		 1835/* Bypass encapsulation if the destination is local */
1836static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
1837 struct vxlan_dev *dst_vxlan)
1838{
8f84985f 1839 struct pcpu_sw_netstats *tx_stats, *rx_stats;
e4c7ed41
CW		 1840 union vxlan_addr loopback;
1841 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
ce6502a8
LR		 1842 struct net_device *dev = skb->dev;
1843 int len = skb->len;
9dcc71e1 1844
8f84985f
LR		 1845 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
1846 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
9dcc71e1
SS		 1847 skb->pkt_type = PACKET_HOST;
1848 skb->encapsulation = 0;
1849 skb->dev = dst_vxlan->dev;
1850 __skb_pull(skb, skb_network_offset(skb));
1851
e4c7ed41
CW		 1852 if (remote_ip->sa.sa_family == AF_INET) {
1853 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1854 loopback.sa.sa_family = AF_INET;
1855#if IS_ENABLED(CONFIG_IPV6)
1856 } else {
1857 loopback.sin6.sin6_addr = in6addr_loopback;
1858 loopback.sa.sa_family = AF_INET6;
1859#endif
1860 }
1861
9dcc71e1 1862 if (dst_vxlan->flags & VXLAN_F_LEARN)
e4c7ed41 1863 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
9dcc71e1
SS		 1864
1865 u64_stats_update_begin(&tx_stats->syncp);
1866 tx_stats->tx_packets++;
ce6502a8 1867 tx_stats->tx_bytes += len;
9dcc71e1
SS		 1868 u64_stats_update_end(&tx_stats->syncp);
1869
1870 if (netif_rx(skb) == NET_RX_SUCCESS) {
1871 u64_stats_update_begin(&rx_stats->syncp);
1872 rx_stats->rx_packets++;
ce6502a8 1873 rx_stats->rx_bytes += len;
9dcc71e1
SS		 1874 u64_stats_update_end(&rx_stats->syncp);
1875 } else {
ce6502a8 1876 dev->stats.rx_dropped++;
9dcc71e1
SS		 1877 }
1878}
1879
4ad16930
SH		 1880static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
1881 struct vxlan_rdst *rdst, bool did_rsc)
d342894c 1882{
d71785ff 1883 struct dst_cache *dst_cache;
3093fbe7 1884 struct ip_tunnel_info *info;
d342894c 1885 struct vxlan_dev *vxlan = netdev_priv(dev);
b1be00a6 1886 struct sock *sk;
e4c7ed41 1887 struct rtable *rt = NULL;
d342894c 1888 const struct iphdr *old_iph;
e4c7ed41 1889 union vxlan_addr *dst;
ee122c79
TG		 1890 union vxlan_addr remote_ip;
1891 struct vxlan_metadata _md;
1892 struct vxlan_metadata *md = &_md;
e4c7ed41 1893 __be16 src_port = 0, dst_port;
54bfd872 1894 __be32 vni;
d342894c 1895 __be16 df = 0;
1896 __u8 tos, ttl;
0e6fbc5b 1897 int err;
ee122c79 1898 u32 flags = vxlan->flags;
b4ed5cad 1899 bool udp_sum = false;
f491e56d 1900 bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
d342894c 1901
61adedf3 1902 info = skb_tunnel_info(skb);
3093fbe7 1903
ee122c79 1904 if (rdst) {
0dfbdf41 1905 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
ee122c79
TG		 1906 vni = rdst->remote_vni;
1907 dst = &rdst->remote_ip;
d71785ff 1908 dst_cache = &rdst->dst_cache;
ee122c79
TG		 1909 } else {
1910 if (!info) {
1911 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1912 dev->name);
1913 goto drop;
1914 }
0dfbdf41 1915 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
54bfd872 1916 vni = vxlan_tun_id_to_vni(info->key.tun_id);
b1be00a6
JB		 1917 remote_ip.sa.sa_family = ip_tunnel_info_af(info);
1918 if (remote_ip.sa.sa_family == AF_INET)
a725e514
JB		 1919 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
1920 else
1921 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
ee122c79 1922 dst = &remote_ip;
d71785ff 1923 dst_cache = &info->dst_cache;
ee122c79 1924 }
e4f67add 1925
e4c7ed41 1926 if (vxlan_addr_any(dst)) {
e4f67add 1927 if (did_rsc) {
e4f67add 1928 /* short-circuited back to local bridge */
9dcc71e1 1929 vxlan_encap_bypass(skb, vxlan, vxlan);
4ad16930 1930 return;
e4f67add 1931 }
ef59febe 1932 goto drop;
e4f67add 1933 }
ef59febe 1934
d342894c 1935 old_iph = ip_hdr(skb);
1936
0dfbdf41 1937 ttl = vxlan->cfg.ttl;
e4c7ed41 1938 if (!ttl && vxlan_addr_multicast(dst))
d342894c 1939 ttl = 1;
1940
0dfbdf41 1941 tos = vxlan->cfg.tos;
d342894c 1942 if (tos == 1)
206aaafc 1943 tos = ip_tunnel_get_dsfield(old_iph, skb);
d342894c 1944
0dfbdf41
TG		 1945 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
1946 vxlan->cfg.port_max, true);
d342894c 1947
a725e514 1948 if (info) {
a725e514
JB		 1949 ttl = info->key.ttl;
1950 tos = info->key.tos;
b4ed5cad 1951 udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
a725e514
JB		 1952
1953 if (info->options_len)
4c222798 1954 md = ip_tunnel_info_opts(info);
a725e514
JB		 1955 } else {
1956 md->gbp = skb->mark;
1957 }
1958
e4c7ed41 1959 if (dst->sa.sa_family == AF_INET) {
1a8496ba
JB		 1960 __be32 saddr;
1961
b1be00a6
JB		 1962 if (!vxlan->vn4_sock)
1963 goto drop;
1964 sk = vxlan->vn4_sock->sock->sk;
1965
35e2d115
JG		 1966 if (info) {
1967 if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)
1968 df = htons(IP_DF);
b4ed5cad
JB		 1969 } else {
1970 udp_sum = !!(flags & VXLAN_F_UDP_CSUM);
35e2d115 1971 }
ee122c79 1972
1a8496ba
JB		 1973 rt = vxlan_get_route(vxlan, skb,
1974 rdst ? rdst->remote_ifindex : 0, tos,
0c1d70af 1975 dst->sin.sin_addr.s_addr, &saddr,
d71785ff 1976 dst_cache, info);
e4c7ed41
CW		 1977 if (IS_ERR(rt)) {
1978 netdev_dbg(dev, "no route to %pI4\n",
1979 &dst->sin.sin_addr.s_addr);
1980 dev->stats.tx_carrier_errors++;
1981 goto tx_error;
1982 }
d342894c 1983
e4c7ed41
CW		 1984 if (rt->dst.dev == dev) {
1985 netdev_dbg(dev, "circular route to %pI4\n",
1986 &dst->sin.sin_addr.s_addr);
1987 dev->stats.collisions++;
fffc15a5 1988 goto rt_tx_error;
e4c7ed41
CW		 1989 }
1990
1991 /* Bypass encapsulation if the destination is local */
1992 if (rt->rt_flags & RTCF_LOCAL &&
1993 !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
1994 struct vxlan_dev *dst_vxlan;
1995
1996 ip_rt_put(rt);
19ca9fc1 1997 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 1998 dst->sa.sa_family, dst_port,
1999 vxlan->flags);
e4c7ed41
CW		 2000 if (!dst_vxlan)
2001 goto tx_error;
2002 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2003 return;
2004 }
2005
2006 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2007 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
f491e56d 2008 err = vxlan_build_skb(skb, &rt->dst, sizeof(struct iphdr),
54bfd872 2009 vni, md, flags, udp_sum);
f491e56d
JB		 2010 if (err < 0)
2011 goto xmit_tx_error;
2012
2013 udp_tunnel_xmit_skb(rt, sk, skb, saddr,
2014 dst->sin.sin_addr.s_addr, tos, ttl, df,
2015 src_port, dst_port, xnet, !udp_sum);
e4c7ed41
CW		 2016#if IS_ENABLED(CONFIG_IPV6)
2017 } else {
e4c7ed41 2018 struct dst_entry *ndst;
e5d4b29f 2019 struct in6_addr saddr;
6f264e47 2020 u32 rt6i_flags;
e4c7ed41 2021
b1be00a6
JB		 2022 if (!vxlan->vn6_sock)
2023 goto drop;
2024 sk = vxlan->vn6_sock->sock->sk;
2025
e5d4b29f
JB		 2026 ndst = vxlan6_get_route(vxlan, skb,
2027 rdst ? rdst->remote_ifindex : 0,
0c1d70af 2028 &dst->sin6.sin6_addr, &saddr,
d71785ff 2029 dst_cache);
e5d4b29f 2030 if (IS_ERR(ndst)) {
e4c7ed41
CW		 2031 netdev_dbg(dev, "no route to %pI6\n",
2032 &dst->sin6.sin6_addr);
2033 dev->stats.tx_carrier_errors++;
9dcc71e1 2034 goto tx_error;
e4c7ed41 2035 }
d342894c 2036
e4c7ed41
CW		 2037 if (ndst->dev == dev) {
2038 netdev_dbg(dev, "circular route to %pI6\n",
2039 &dst->sin6.sin6_addr);
2040 dst_release(ndst);
2041 dev->stats.collisions++;
2042 goto tx_error;
2043 }
0e6fbc5b 2044
e4c7ed41 2045 /* Bypass encapsulation if the destination is local */
6f264e47
JB		 2046 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
2047 if (rt6i_flags & RTF_LOCAL &&
2048 !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
e4c7ed41
CW		 2049 struct vxlan_dev *dst_vxlan;
2050
2051 dst_release(ndst);
19ca9fc1 2052 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 2053 dst->sa.sa_family, dst_port,
2054 vxlan->flags);
e4c7ed41
CW		 2055 if (!dst_vxlan)
2056 goto tx_error;
2057 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2058 return;
2059 }
49560532 2060
b4ed5cad
JB		 2061 if (!info)
2062 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
35e2d115 2063
e4c7ed41 2064 ttl = ttl ? : ip6_dst_hoplimit(ndst);
f491e56d
JB		 2065 skb_scrub_packet(skb, xnet);
2066 err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
54bfd872 2067 vni, md, flags, udp_sum);
f491e56d
JB		 2068 if (err < 0) {
2069 dst_release(ndst);
2070 return;
2071 }
2072 udp_tunnel6_xmit_skb(ndst, sk, skb, dev,
2073 &saddr, &dst->sin6.sin6_addr,
2074 0, ttl, src_port, dst_port, !udp_sum);
e4c7ed41
CW		 2075#endif
2076 }
0e6fbc5b 2077
4ad16930 2078 return;
d342894c 2079
2080drop:
2081 dev->stats.tx_dropped++;
2082 goto tx_free;
2083
f491e56d
JB		 2084xmit_tx_error:
2085 /* skb is already freed. */
2086 skb = NULL;
49560532
PS		 2087rt_tx_error:
2088 ip_rt_put(rt);
d342894c 2089tx_error:
2090 dev->stats.tx_errors++;
2091tx_free:
2092 dev_kfree_skb(skb);
d342894c 2093}
2094
6681712d
DS		 2095/* Transmit local packets over Vxlan
2096 *
2097 * Outer IP header inherits ECN and DF from inner header.
2098 * Outer UDP destination is the VXLAN assigned port.
2099 * source port is based on hash of flow
2100 */
2101static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2102{
2103 struct vxlan_dev *vxlan = netdev_priv(dev);
3093fbe7 2104 const struct ip_tunnel_info *info;
6681712d
DS		 2105 struct ethhdr *eth;
2106 bool did_rsc = false;
8f646c92 2107 struct vxlan_rdst *rdst, *fdst = NULL;
6681712d 2108 struct vxlan_fdb *f;
6681712d 2109
61adedf3 2110 info = skb_tunnel_info(skb);
3093fbe7 2111
6681712d
DS		 2112 skb_reset_mac_header(skb);
2113 eth = eth_hdr(skb);
2114
f564f45c
CW		 2115 if ((vxlan->flags & VXLAN_F_PROXY)) {
2116 if (ntohs(eth->h_proto) == ETH_P_ARP)
2117 return arp_reduce(dev, skb);
2118#if IS_ENABLED(CONFIG_IPV6)
2119 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
91269e39
LR		 2120 pskb_may_pull(skb, sizeof(struct ipv6hdr)
2121 + sizeof(struct nd_msg)) &&
f564f45c
CW		 2122 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2123 struct nd_msg *msg;
2124
2125 msg = (struct nd_msg *)skb_transport_header(skb);
2126 if (msg->icmph.icmp6_code == 0 &&
2127 msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
2128 return neigh_reduce(dev, skb);
2129 }
7a9f526f 2130 eth = eth_hdr(skb);
f564f45c
CW		 2131#endif
2132 }
6681712d 2133
da8b43c0 2134 if (vxlan->flags & VXLAN_F_COLLECT_METADATA &&
46fa062a 2135 info && info->mode & IP_TUNNEL_INFO_TX) {
ee122c79
TG		 2136 vxlan_xmit_one(skb, dev, NULL, false);
2137 return NETDEV_TX_OK;
2138 }
2139
6681712d 2140 f = vxlan_find_mac(vxlan, eth->h_dest);
ae884082
DS		 2141 did_rsc = false;
2142
2143 if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) &&
e15a00aa
CW		 2144 (ntohs(eth->h_proto) == ETH_P_IP ||
2145 ntohs(eth->h_proto) == ETH_P_IPV6)) {
ae884082
DS		 2146 did_rsc = route_shortcircuit(dev, skb);
2147 if (did_rsc)
2148 f = vxlan_find_mac(vxlan, eth->h_dest);
2149 }
2150
6681712d 2151 if (f == NULL) {
afbd8bae
MR		 2152 f = vxlan_find_mac(vxlan, all_zeros_mac);
2153 if (f == NULL) {
2154 if ((vxlan->flags & VXLAN_F_L2MISS) &&
2155 !is_multicast_ether_addr(eth->h_dest))
2156 vxlan_fdb_miss(vxlan, eth->h_dest);
2157
2158 dev->stats.tx_dropped++;
8f646c92 2159 kfree_skb(skb);
afbd8bae
MR		 2160 return NETDEV_TX_OK;
2161 }
2162 }
6681712d 2163
afbd8bae
MR		 2164 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2165 struct sk_buff *skb1;
6681712d 2166
8f646c92
ED		 2167 if (!fdst) {
2168 fdst = rdst;
2169 continue;
2170 }
afbd8bae
MR		 2171 skb1 = skb_clone(skb, GFP_ATOMIC);
2172 if (skb1)
2173 vxlan_xmit_one(skb1, dev, rdst, did_rsc);
6681712d
DS		 2174 }
2175
8f646c92
ED		 2176 if (fdst)
2177 vxlan_xmit_one(skb, dev, fdst, did_rsc);
2178 else
2179 kfree_skb(skb);
4ad16930 2180 return NETDEV_TX_OK;
6681712d
DS		 2181}
2182
d342894c 2183/* Walk the forwarding table and purge stale entries */
2184static void vxlan_cleanup(unsigned long arg)
2185{
2186 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
2187 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2188 unsigned int h;
2189
2190 if (!netif_running(vxlan->dev))
2191 return;
2192
d342894c 2193 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2194 struct hlist_node *p, *n;
14e1d0fa
SD		 2195
2196 spin_lock_bh(&vxlan->hash_lock);
d342894c 2197 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2198 struct vxlan_fdb *f
2199 = container_of(p, struct vxlan_fdb, hlist);
2200 unsigned long timeout;
2201
3c172868 2202 if (f->state & NUD_PERMANENT)
d342894c 2203 continue;
2204
0dfbdf41 2205 timeout = f->used + vxlan->cfg.age_interval * HZ;
d342894c 2206 if (time_before_eq(timeout, jiffies)) {
2207 netdev_dbg(vxlan->dev,
2208 "garbage collect %pM\n",
2209 f->eth_addr);
2210 f->state = NUD_STALE;
2211 vxlan_fdb_destroy(vxlan, f);
2212 } else if (time_before(timeout, next_timer))
2213 next_timer = timeout;
2214 }
14e1d0fa 2215 spin_unlock_bh(&vxlan->hash_lock);
d342894c 2216 }
d342894c 2217
2218 mod_timer(&vxlan->age_timer, next_timer);
2219}
2220
9c2e24e1
PS		 2221static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
2222{
56ef9c90 2223 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
54bfd872 2224 __be32 vni = vxlan->default_dst.remote_vni;
9c2e24e1 2225
56ef9c90 2226 spin_lock(&vn->sock_lock);
9c2e24e1 2227 hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
56ef9c90 2228 spin_unlock(&vn->sock_lock);
9c2e24e1
PS		 2229}
2230
d342894c 2231/* Setup stats when device is created */
2232static int vxlan_init(struct net_device *dev)
2233{
1c213bd2 2234 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
e8171045 2235 if (!dev->tstats)
d342894c 2236 return -ENOMEM;
2237
2238 return 0;
2239}
2240
ba609e9b 2241static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan)
afbd8bae
MR		 2242{
2243 struct vxlan_fdb *f;
2244
2245 spin_lock_bh(&vxlan->hash_lock);
2246 f = __vxlan_find_mac(vxlan, all_zeros_mac);
2247 if (f)
2248 vxlan_fdb_destroy(vxlan, f);
2249 spin_unlock_bh(&vxlan->hash_lock);
2250}
2251
ebf4063e
SH		 2252static void vxlan_uninit(struct net_device *dev)
2253{
2254 struct vxlan_dev *vxlan = netdev_priv(dev);
ebf4063e 2255
ba609e9b 2256 vxlan_fdb_delete_default(vxlan);
afbd8bae 2257
ebf4063e
SH		 2258 free_percpu(dev->tstats);
2259}
2260
d342894c 2261/* Start ageing timer and join group when device is brought up */
2262static int vxlan_open(struct net_device *dev)
2263{
2264 struct vxlan_dev *vxlan = netdev_priv(dev);
205f356d 2265 int ret;
56ef9c90 2266
205f356d
JB		 2267 ret = vxlan_sock_add(vxlan);
2268 if (ret < 0)
2269 return ret;
d342894c 2270
79d4a94f 2271 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
56ef9c90 2272 ret = vxlan_igmp_join(vxlan);
bef0057b
MRL		 2273 if (ret == -EADDRINUSE)
2274 ret = 0;
56ef9c90 2275 if (ret) {
205f356d 2276 vxlan_sock_release(vxlan);
56ef9c90
MRL		 2277 return ret;
2278 }
d342894c 2279 }
2280
0dfbdf41 2281 if (vxlan->cfg.age_interval)
d342894c 2282 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2283
56ef9c90 2284 return ret;
d342894c 2285}
2286
2287/* Purge the forwarding table */
2288static void vxlan_flush(struct vxlan_dev *vxlan)
2289{
31fec5aa 2290 unsigned int h;
d342894c 2291
2292 spin_lock_bh(&vxlan->hash_lock);
2293 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2294 struct hlist_node *p, *n;
2295 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2296 struct vxlan_fdb *f
2297 = container_of(p, struct vxlan_fdb, hlist);
afbd8bae
MR		 2298 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2299 if (!is_zero_ether_addr(f->eth_addr))
2300 vxlan_fdb_destroy(vxlan, f);
d342894c 2301 }
2302 }
2303 spin_unlock_bh(&vxlan->hash_lock);
2304}
2305
2306/* Cleanup timer and forwarding table on shutdown */
2307static int vxlan_stop(struct net_device *dev)
2308{
2309 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2310 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
56ef9c90 2311 int ret = 0;
d342894c 2312
24c0e683 2313 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
f13b1689 2314 !vxlan_group_used(vn, vxlan))
56ef9c90 2315 ret = vxlan_igmp_leave(vxlan);
d342894c 2316
2317 del_timer_sync(&vxlan->age_timer);
2318
2319 vxlan_flush(vxlan);
205f356d 2320 vxlan_sock_release(vxlan);
d342894c 2321
56ef9c90 2322 return ret;
d342894c 2323}
2324
d342894c 2325/* Stub, nothing needs to be done. */
2326static void vxlan_set_multicast_list(struct net_device *dev)
2327{
2328}
2329
345010b5
DB		 2330static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2331{
2332 struct vxlan_dev *vxlan = netdev_priv(dev);
2333 struct vxlan_rdst *dst = &vxlan->default_dst;
2334 struct net_device *lowerdev;
2335 int max_mtu;
2336
f01ec1c0 2337 lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex);
345010b5
DB		 2338 if (lowerdev == NULL)
2339 return eth_change_mtu(dev, new_mtu);
2340
2341 if (dst->remote_ip.sa.sa_family == AF_INET6)
2342 max_mtu = lowerdev->mtu - VXLAN6_HEADROOM;
2343 else
2344 max_mtu = lowerdev->mtu - VXLAN_HEADROOM;
2345
2346 if (new_mtu < 68 || new_mtu > max_mtu)
2347 return -EINVAL;
2348
2349 dev->mtu = new_mtu;
2350 return 0;
2351}
2352
fc4099f1
PS		 2353static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
2354{
2355 struct vxlan_dev *vxlan = netdev_priv(dev);
2356 struct ip_tunnel_info *info = skb_tunnel_info(skb);
2357 __be16 sport, dport;
2358
2359 sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2360 vxlan->cfg.port_max, true);
2361 dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
2362
239e944f 2363 if (ip_tunnel_info_af(info) == AF_INET) {
1a8496ba
JB		 2364 struct rtable *rt;
2365
239e944f
JB		 2366 if (!vxlan->vn4_sock)
2367 return -EINVAL;
1a8496ba
JB		 2368 rt = vxlan_get_route(vxlan, skb, 0, info->key.tos,
2369 info->key.u.ipv4.dst,
0c1d70af 2370 &info->key.u.ipv4.src, NULL, info);
1a8496ba
JB		 2371 if (IS_ERR(rt))
2372 return PTR_ERR(rt);
2373 ip_rt_put(rt);
239e944f
JB		 2374 } else {
2375#if IS_ENABLED(CONFIG_IPV6)
2376 struct dst_entry *ndst;
2377
2378 if (!vxlan->vn6_sock)
2379 return -EINVAL;
2380 ndst = vxlan6_get_route(vxlan, skb, 0,
2381 &info->key.u.ipv6.dst,
0c1d70af 2382 &info->key.u.ipv6.src, NULL);
239e944f
JB		 2383 if (IS_ERR(ndst))
2384 return PTR_ERR(ndst);
2385 dst_release(ndst);
239e944f
JB		 2386#else /* !CONFIG_IPV6 */
2387 return -EPFNOSUPPORT;
2388#endif
2389 }
1a8496ba
JB		 2390 info->key.tp_src = sport;
2391 info->key.tp_dst = dport;
239e944f 2392 return 0;
fc4099f1
PS		 2393}
2394
d342894c 2395static const struct net_device_ops vxlan_netdev_ops = {
2396 .ndo_init = vxlan_init,
ebf4063e 2397 .ndo_uninit = vxlan_uninit,
d342894c 2398 .ndo_open = vxlan_open,
2399 .ndo_stop = vxlan_stop,
2400 .ndo_start_xmit = vxlan_xmit,
e8171045 2401 .ndo_get_stats64 = ip_tunnel_get_stats64,
d342894c 2402 .ndo_set_rx_mode = vxlan_set_multicast_list,
345010b5 2403 .ndo_change_mtu = vxlan_change_mtu,
d342894c 2404 .ndo_validate_addr = eth_validate_addr,
2405 .ndo_set_mac_address = eth_mac_addr,
2406 .ndo_fdb_add = vxlan_fdb_add,
2407 .ndo_fdb_del = vxlan_fdb_delete,
2408 .ndo_fdb_dump = vxlan_fdb_dump,
fc4099f1 2409 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
d342894c 2410};
2411
2412/* Info for udev, that this is a virtual tunnel endpoint */
2413static struct device_type vxlan_type = {
2414 .name = "vxlan",
2415};
2416
53cf5275 2417/* Calls the ndo_add_vxlan_port of the caller in order to
35e42379
JG		 2418 * supply the listening VXLAN udp ports. Callers are expected
2419 * to implement the ndo_add_vxlan_port.
53cf5275
JG		 2420 */
2421void vxlan_get_rx_port(struct net_device *dev)
2422{
2423 struct vxlan_sock *vs;
2424 struct net *net = dev_net(dev);
2425 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2426 sa_family_t sa_family;
35e42379
JG		 2427 __be16 port;
2428 unsigned int i;
53cf5275
JG		 2429
2430 spin_lock(&vn->sock_lock);
2431 for (i = 0; i < PORT_HASH_SIZE; ++i) {
35e42379
JG		 2432 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2433 port = inet_sk(vs->sock->sk)->inet_sport;
705cc62f 2434 sa_family = vxlan_get_sk_family(vs);
53cf5275
JG		 2435 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
2436 port);
2437 }
2438 }
2439 spin_unlock(&vn->sock_lock);
2440}
2441EXPORT_SYMBOL_GPL(vxlan_get_rx_port);
2442
d342894c 2443/* Initialize the device structure. */
2444static void vxlan_setup(struct net_device *dev)
2445{
2446 struct vxlan_dev *vxlan = netdev_priv(dev);
31fec5aa 2447 unsigned int h;
d342894c 2448
2449 eth_hw_addr_random(dev);
2450 ether_setup(dev);
2451
2452 dev->netdev_ops = &vxlan_netdev_ops;
ebf4063e 2453 dev->destructor = free_netdev;
d342894c 2454 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2455
d342894c 2456 dev->features |= NETIF_F_LLTX;
d6727fe3 2457 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
0afb1666 2458 dev->features |= NETIF_F_RXCSUM;
05c0db08 2459 dev->features |= NETIF_F_GSO_SOFTWARE;
0afb1666 2460
1eaa8178
PS		 2461 dev->vlan_features = dev->features;
2462 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
0afb1666 2463 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
05c0db08 2464 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1eaa8178 2465 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
02875878 2466 netif_keep_dst(dev);
22dba393 2467 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
d342894c 2468
553675fb 2469 INIT_LIST_HEAD(&vxlan->next);
d342894c 2470 spin_lock_init(&vxlan->hash_lock);
2471
2472 init_timer_deferrable(&vxlan->age_timer);
2473 vxlan->age_timer.function = vxlan_cleanup;
2474 vxlan->age_timer.data = (unsigned long) vxlan;
2475
0dfbdf41 2476 vxlan->cfg.dst_port = htons(vxlan_port);
05f47d69 2477
d342894c 2478 vxlan->dev = dev;
2479
58ce31cc
TH		 2480 gro_cells_init(&vxlan->gro_cells, dev);
2481
d342894c 2482 for (h = 0; h < FDB_HASH_SIZE; ++h)
2483 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2484}
2485
2486static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2487 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
5d174dd8 2488 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
e4c7ed41 2489 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
d342894c 2490 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2491 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
e4c7ed41 2492 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
d342894c 2493 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2494 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
2495 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2496 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2497 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
05f47d69 2498 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
e4f67add
DS		 2499 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2500 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2501 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2502 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
f8a9b1bc 2503 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
823aa873 2504 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
5c91ae08
TH		 2505 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2506 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2507 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
dfd8645e
TH		 2508 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2509 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
3511494c 2510 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
0ace2ca8 2511 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
d342894c 2512};
2513
2514static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
2515{
2516 if (tb[IFLA_ADDRESS]) {
2517 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2518 pr_debug("invalid link address (not ethernet)\n");
2519 return -EINVAL;
2520 }
2521
2522 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2523 pr_debug("invalid all zero ethernet address\n");
2524 return -EADDRNOTAVAIL;
2525 }
2526 }
2527
2528 if (!data)
2529 return -EINVAL;
2530
2531 if (data[IFLA_VXLAN_ID]) {
2532 __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2533 if (id >= VXLAN_VID_MASK)
2534 return -ERANGE;
2535 }
2536
05f47d69 2537 if (data[IFLA_VXLAN_PORT_RANGE]) {
2538 const struct ifla_vxlan_port_range *p
2539 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2540
2541 if (ntohs(p->high) < ntohs(p->low)) {
2542 pr_debug("port range %u .. %u not valid\n",
2543 ntohs(p->low), ntohs(p->high));
2544 return -EINVAL;
2545 }
2546 }
2547
d342894c 2548 return 0;
2549}
2550
1b13c97f
YB		 2551static void vxlan_get_drvinfo(struct net_device *netdev,
2552 struct ethtool_drvinfo *drvinfo)
2553{
2554 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2555 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2556}
2557
2558static const struct ethtool_ops vxlan_ethtool_ops = {
2559 .get_drvinfo = vxlan_get_drvinfo,
2560 .get_link = ethtool_op_get_link,
2561};
2562
553675fb 2563static void vxlan_del_work(struct work_struct *work)
2564{
2565 struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
acbf74a7 2566 udp_tunnel_sock_release(vs->sock);
553675fb 2567 kfree_rcu(vs, rcu);
2568}
2569
3ee64f39
TH		 2570static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2571 __be16 port, u32 flags)
553675fb 2572{
e4c7ed41 2573 struct socket *sock;
3ee64f39
TH		 2574 struct udp_port_cfg udp_conf;
2575 int err;
e4c7ed41 2576
3ee64f39 2577 memset(&udp_conf, 0, sizeof(udp_conf));
e4c7ed41 2578
3ee64f39
TH		 2579 if (ipv6) {
2580 udp_conf.family = AF_INET6;
3ee64f39 2581 udp_conf.use_udp6_rx_checksums =
3dc2b6a8 2582 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
a43a9ef6 2583 udp_conf.ipv6_v6only = 1;
3ee64f39
TH		 2584 } else {
2585 udp_conf.family = AF_INET;
e4c7ed41 2586 }
e4c7ed41 2587
3ee64f39 2588 udp_conf.local_udp_port = port;
553675fb 2589
3ee64f39
TH		 2590 /* Open UDP socket */
2591 err = udp_sock_create(net, &udp_conf, &sock);
2592 if (err < 0)
2593 return ERR_PTR(err);
e4c7ed41 2594
39deb2c7 2595 return sock;
e4c7ed41
CW		 2596}
2597
2598/* Create new listen socket if needed */
b1be00a6
JB		 2599static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
2600 __be16 port, u32 flags)
e4c7ed41
CW		 2601{
2602 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2603 struct vxlan_sock *vs;
2604 struct socket *sock;
e4c7ed41 2605 unsigned int h;
acbf74a7 2606 struct udp_tunnel_sock_cfg tunnel_cfg;
e4c7ed41 2607
dc01e7d3 2608 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
e4c7ed41
CW		 2609 if (!vs)
2610 return ERR_PTR(-ENOMEM);
2611
2612 for (h = 0; h < VNI_HASH_SIZE; ++h)
2613 INIT_HLIST_HEAD(&vs->vni_list[h]);
2614
2615 INIT_WORK(&vs->del_work, vxlan_del_work);
2616
3ee64f39 2617 sock = vxlan_create_sock(net, ipv6, port, flags);
39deb2c7 2618 if (IS_ERR(sock)) {
56ef9c90
MRL		 2619 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port),
2620 PTR_ERR(sock));
553675fb 2621 kfree(vs);
e50fddc8 2622 return ERR_CAST(sock);
553675fb 2623 }
e4c7ed41
CW		 2624
2625 vs->sock = sock;
9c2e24e1 2626 atomic_set(&vs->refcnt, 1);
af33c1ad 2627 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
553675fb 2628
dc01e7d3
OG		 2629 /* Initialize the vxlan udp offloads structure */
2630 vs->udp_offloads.port = port;
2631 vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive;
2632 vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete;
2633
9c2e24e1
PS		 2634 spin_lock(&vn->sock_lock);
2635 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
dc01e7d3 2636 vxlan_notify_add_rx_port(vs);
9c2e24e1 2637 spin_unlock(&vn->sock_lock);
553675fb 2638
2639 /* Mark socket as an encapsulation socket. */
acbf74a7
AZ		 2640 tunnel_cfg.sk_user_data = vs;
2641 tunnel_cfg.encap_type = 1;
2642 tunnel_cfg.encap_rcv = vxlan_udp_encap_recv;
2643 tunnel_cfg.encap_destroy = NULL;
2644
2645 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
e4c7ed41 2646
9c2e24e1
PS		 2647 return vs;
2648}
2649
b1be00a6 2650static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6)
9c2e24e1 2651{
205f356d
JB		 2652 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2653 struct vxlan_sock *vs = NULL;
9c2e24e1 2654
205f356d 2655 if (!vxlan->cfg.no_share) {
56ef9c90 2656 spin_lock(&vn->sock_lock);
205f356d
JB		 2657 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
2658 vxlan->cfg.dst_port, vxlan->flags);
2659 if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) {
56ef9c90 2660 spin_unlock(&vn->sock_lock);
205f356d 2661 return -EBUSY;
56ef9c90
MRL		 2662 }
2663 spin_unlock(&vn->sock_lock);
2664 }
205f356d 2665 if (!vs)
b1be00a6
JB		 2666 vs = vxlan_socket_create(vxlan->net, ipv6,
2667 vxlan->cfg.dst_port, vxlan->flags);
205f356d
JB		 2668 if (IS_ERR(vs))
2669 return PTR_ERR(vs);
b1be00a6
JB		 2670#if IS_ENABLED(CONFIG_IPV6)
2671 if (ipv6)
2672 vxlan->vn6_sock = vs;
2673 else
2674#endif
2675 vxlan->vn4_sock = vs;
205f356d
JB		 2676 vxlan_vs_add_dev(vs, vxlan);
2677 return 0;
553675fb 2678}
2679
b1be00a6
JB		 2680static int vxlan_sock_add(struct vxlan_dev *vxlan)
2681{
2682 bool ipv6 = vxlan->flags & VXLAN_F_IPV6;
2683 bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA;
2684 int ret = 0;
2685
2686 vxlan->vn4_sock = NULL;
2687#if IS_ENABLED(CONFIG_IPV6)
2688 vxlan->vn6_sock = NULL;
2689 if (ipv6 || metadata)
2690 ret = __vxlan_sock_add(vxlan, true);
2691#endif
2692 if (!ret && (!ipv6 || metadata))
2693 ret = __vxlan_sock_add(vxlan, false);
2694 if (ret < 0)
2695 vxlan_sock_release(vxlan);
2696 return ret;
2697}
2698
0dfbdf41
TG		 2699static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
2700 struct vxlan_config *conf)
d342894c 2701{
33564bbb 2702 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
07b9b37c 2703 struct vxlan_dev *vxlan = netdev_priv(dev), *tmp;
c7995c43 2704 struct vxlan_rdst *dst = &vxlan->default_dst;
b1be00a6 2705 unsigned short needed_headroom = ETH_HLEN;
d342894c 2706 int err;
e4c7ed41 2707 bool use_ipv6 = false;
0dfbdf41 2708 __be16 default_port = vxlan->cfg.dst_port;
d342894c 2709
33564bbb 2710 vxlan->net = src_net;
f01ec1c0 2711
0dfbdf41 2712 dst->remote_vni = conf->vni;
d342894c 2713
0dfbdf41 2714 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
d342894c 2715
0dfbdf41
TG		 2716 /* Unless IPv6 is explicitly requested, assume IPv4 */
2717 if (!dst->remote_ip.sa.sa_family)
2718 dst->remote_ip.sa.sa_family = AF_INET;
e4c7ed41 2719
0dfbdf41 2720 if (dst->remote_ip.sa.sa_family == AF_INET6 ||
057ba29b
JB		 2721 vxlan->cfg.saddr.sa.sa_family == AF_INET6) {
2722 if (!IS_ENABLED(CONFIG_IPV6))
2723 return -EPFNOSUPPORT;
e4c7ed41 2724 use_ipv6 = true;
b1be00a6 2725 vxlan->flags |= VXLAN_F_IPV6;
057ba29b 2726 }
d342894c 2727
0dfbdf41 2728 if (conf->remote_ifindex) {
34e02aa1 2729 struct net_device *lowerdev
0dfbdf41
TG		 2730 = __dev_get_by_index(src_net, conf->remote_ifindex);
2731
2732 dst->remote_ifindex = conf->remote_ifindex;
34e02aa1 2733
2734 if (!lowerdev) {
c7995c43 2735 pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
34e02aa1 2736 return -ENODEV;
2737 }
d342894c 2738
e4c7ed41
CW		 2739#if IS_ENABLED(CONFIG_IPV6)
2740 if (use_ipv6) {
2741 struct inet6_dev *idev = __in6_dev_get(lowerdev);
2742 if (idev && idev->cnf.disable_ipv6) {
2743 pr_info("IPv6 is disabled via sysctl\n");
2744 return -EPERM;
2745 }
e4c7ed41
CW		 2746 }
2747#endif
2748
0dfbdf41 2749 if (!conf->mtu)
e4c7ed41 2750 dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
1ba56fb4 2751
b1be00a6 2752 needed_headroom = lowerdev->hard_header_len;
9dc2ad10 2753 }
d342894c 2754
b1be00a6
JB		 2755 if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
2756 needed_headroom += VXLAN6_HEADROOM;
2757 else
2758 needed_headroom += VXLAN_HEADROOM;
2759 dev->needed_headroom = needed_headroom;
2760
0dfbdf41
TG		 2761 memcpy(&vxlan->cfg, conf, sizeof(*conf));
2762 if (!vxlan->cfg.dst_port)
2763 vxlan->cfg.dst_port = default_port;
2764 vxlan->flags |= conf->flags;
2765
2766 if (!vxlan->cfg.age_interval)
2767 vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
2768
07b9b37c
ND		 2769 list_for_each_entry(tmp, &vn->vxlan_list, next) {
2770 if (tmp->cfg.vni == conf->vni &&
2771 (tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 ||
2772 tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 &&
2773 tmp->cfg.dst_port == vxlan->cfg.dst_port &&
2774 (tmp->flags & VXLAN_F_RCV_FLAGS) ==
2775 (vxlan->flags & VXLAN_F_RCV_FLAGS))
0dfbdf41 2776 return -EEXIST;
07b9b37c 2777 }
0dfbdf41
TG		 2778
2779 dev->ethtool_ops = &vxlan_ethtool_ops;
2780
2781 /* create an fdb entry for a valid default destination */
2782 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
2783 err = vxlan_fdb_create(vxlan, all_zeros_mac,
2784 &vxlan->default_dst.remote_ip,
2785 NUD_REACHABLE|NUD_PERMANENT,
2786 NLM_F_EXCL|NLM_F_CREATE,
2787 vxlan->cfg.dst_port,
2788 vxlan->default_dst.remote_vni,
2789 vxlan->default_dst.remote_ifindex,
2790 NTF_SELF);
2791 if (err)
2792 return err;
2793 }
2794
2795 err = register_netdevice(dev);
2796 if (err) {
2797 vxlan_fdb_delete_default(vxlan);
2798 return err;
2799 }
2800
2801 list_add(&vxlan->next, &vn->vxlan_list);
2802
2803 return 0;
2804}
2805
2806struct net_device *vxlan_dev_create(struct net *net, const char *name,
2807 u8 name_assign_type, struct vxlan_config *conf)
2808{
2809 struct nlattr *tb[IFLA_MAX+1];
2810 struct net_device *dev;
2811 int err;
2812
2813 memset(&tb, 0, sizeof(tb));
2814
2815 dev = rtnl_create_link(net, name, name_assign_type,
2816 &vxlan_link_ops, tb);
2817 if (IS_ERR(dev))
2818 return dev;
2819
2820 err = vxlan_dev_configure(net, dev, conf);
2821 if (err < 0) {
2822 free_netdev(dev);
2823 return ERR_PTR(err);
2824 }
2825
2826 return dev;
2827}
2828EXPORT_SYMBOL_GPL(vxlan_dev_create);
2829
2830static int vxlan_newlink(struct net *src_net, struct net_device *dev,
2831 struct nlattr *tb[], struct nlattr *data[])
2832{
2833 struct vxlan_config conf;
2834 int err;
2835
0dfbdf41 2836 memset(&conf, 0, sizeof(conf));
e277de5f
JG		 2837
2838 if (data[IFLA_VXLAN_ID])
54bfd872 2839 conf.vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
0dfbdf41
TG		 2840
2841 if (data[IFLA_VXLAN_GROUP]) {
2842 conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
2843 } else if (data[IFLA_VXLAN_GROUP6]) {
2844 if (!IS_ENABLED(CONFIG_IPV6))
2845 return -EPFNOSUPPORT;
2846
2847 conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
2848 conf.remote_ip.sa.sa_family = AF_INET6;
2849 }
2850
2851 if (data[IFLA_VXLAN_LOCAL]) {
2852 conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
2853 conf.saddr.sa.sa_family = AF_INET;
2854 } else if (data[IFLA_VXLAN_LOCAL6]) {
2855 if (!IS_ENABLED(CONFIG_IPV6))
2856 return -EPFNOSUPPORT;
2857
2858 /* TODO: respect scope id */
2859 conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
2860 conf.saddr.sa.sa_family = AF_INET6;
2861 }
2862
2863 if (data[IFLA_VXLAN_LINK])
2864 conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
2865
d342894c 2866 if (data[IFLA_VXLAN_TOS])
0dfbdf41 2867 conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
d342894c 2868
afb97186 2869 if (data[IFLA_VXLAN_TTL])
0dfbdf41 2870 conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
afb97186 2871
d342894c 2872 if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
0dfbdf41 2873 conf.flags |= VXLAN_F_LEARN;
d342894c 2874
2875 if (data[IFLA_VXLAN_AGEING])
0dfbdf41 2876 conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
d342894c 2877
e4f67add 2878 if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
0dfbdf41 2879 conf.flags |= VXLAN_F_PROXY;
e4f67add
DS		 2880
2881 if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
0dfbdf41 2882 conf.flags |= VXLAN_F_RSC;
e4f67add
DS		 2883
2884 if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
0dfbdf41 2885 conf.flags |= VXLAN_F_L2MISS;
e4f67add
DS		 2886
2887 if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
0dfbdf41 2888 conf.flags |= VXLAN_F_L3MISS;
e4f67add 2889
d342894c 2890 if (data[IFLA_VXLAN_LIMIT])
0dfbdf41 2891 conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
d342894c 2892
f8a9b1bc
AS		 2893 if (data[IFLA_VXLAN_COLLECT_METADATA] &&
2894 nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
2895 conf.flags |= VXLAN_F_COLLECT_METADATA;
2896
05f47d69 2897 if (data[IFLA_VXLAN_PORT_RANGE]) {
2898 const struct ifla_vxlan_port_range *p
2899 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
0dfbdf41
TG		 2900 conf.port_min = ntohs(p->low);
2901 conf.port_max = ntohs(p->high);
05f47d69 2902 }
2903
823aa873 2904 if (data[IFLA_VXLAN_PORT])
0dfbdf41 2905 conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
823aa873 2906
359a0ea9 2907 if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
0dfbdf41 2908 conf.flags |= VXLAN_F_UDP_CSUM;
359a0ea9
TH		 2909
2910 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
2911 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
0dfbdf41 2912 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
359a0ea9
TH		 2913
2914 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
2915 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
0dfbdf41 2916 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
359a0ea9 2917
dfd8645e
TH		 2918 if (data[IFLA_VXLAN_REMCSUM_TX] &&
2919 nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
0dfbdf41 2920 conf.flags |= VXLAN_F_REMCSUM_TX;
dfd8645e
TH		 2921
2922 if (data[IFLA_VXLAN_REMCSUM_RX] &&
2923 nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
0dfbdf41 2924 conf.flags |= VXLAN_F_REMCSUM_RX;
dfd8645e 2925
3511494c 2926 if (data[IFLA_VXLAN_GBP])
0dfbdf41 2927 conf.flags |= VXLAN_F_GBP;
3511494c 2928
0ace2ca8 2929 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
0dfbdf41 2930 conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
0ace2ca8 2931
0dfbdf41
TG		 2932 err = vxlan_dev_configure(src_net, dev, &conf);
2933 switch (err) {
2934 case -ENODEV:
2935 pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
2936 break;
1b13c97f 2937
0dfbdf41
TG		 2938 case -EPERM:
2939 pr_info("IPv6 is disabled via sysctl\n");
2940 break;
d342894c 2941
0dfbdf41 2942 case -EEXIST:
54bfd872 2943 pr_info("duplicate VNI %u\n", be32_to_cpu(conf.vni));
0dfbdf41 2944 break;
afbd8bae
MR		 2945 }
2946
0dfbdf41 2947 return err;
d342894c 2948}
2949
2950static void vxlan_dellink(struct net_device *dev, struct list_head *head)
2951{
2952 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2953 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
d342894c 2954
fe5c3561 2955 spin_lock(&vn->sock_lock);
9c2e24e1
PS		 2956 if (!hlist_unhashed(&vxlan->hlist))
2957 hlist_del_rcu(&vxlan->hlist);
fe5c3561 2958 spin_unlock(&vn->sock_lock);
2959
58ce31cc 2960 gro_cells_destroy(&vxlan->gro_cells);
553675fb 2961 list_del(&vxlan->next);
d342894c 2962 unregister_netdevice_queue(dev, head);
2963}
2964
2965static size_t vxlan_get_size(const struct net_device *dev)
2966{
2967
2968 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
e4c7ed41 2969 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
d342894c 2970 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
e4c7ed41 2971 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
d342894c 2972 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
2973 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
2974 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
e4f67add
DS		 2975 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
2976 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
2977 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
2978 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
da8b43c0 2979 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
d342894c 2980 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
2981 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
05f47d69 2982 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
359a0ea9
TH		 2983 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
2984 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
2985 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
2986 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
dfd8645e
TH		 2987 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
2988 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
d342894c 2989 0;
2990}
2991
2992static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
2993{
2994 const struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 2995 const struct vxlan_rdst *dst = &vxlan->default_dst;
05f47d69 2996 struct ifla_vxlan_port_range ports = {
0dfbdf41
TG		 2997 .low = htons(vxlan->cfg.port_min),
2998 .high = htons(vxlan->cfg.port_max),
05f47d69 2999 };
d342894c 3000
54bfd872 3001 if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni)))
d342894c 3002 goto nla_put_failure;
3003
e4c7ed41
CW		 3004 if (!vxlan_addr_any(&dst->remote_ip)) {
3005 if (dst->remote_ip.sa.sa_family == AF_INET) {
930345ea
JB		 3006 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
3007 dst->remote_ip.sin.sin_addr.s_addr))
e4c7ed41
CW		 3008 goto nla_put_failure;
3009#if IS_ENABLED(CONFIG_IPV6)
3010 } else {
930345ea
JB		 3011 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
3012 &dst->remote_ip.sin6.sin6_addr))
e4c7ed41
CW		 3013 goto nla_put_failure;
3014#endif
3015 }
3016 }
d342894c 3017
c7995c43 3018 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
d342894c 3019 goto nla_put_failure;
3020
0dfbdf41
TG		 3021 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
3022 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
930345ea 3023 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
0dfbdf41 3024 vxlan->cfg.saddr.sin.sin_addr.s_addr))
e4c7ed41
CW		 3025 goto nla_put_failure;
3026#if IS_ENABLED(CONFIG_IPV6)
3027 } else {
930345ea 3028 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
0dfbdf41 3029 &vxlan->cfg.saddr.sin6.sin6_addr))
e4c7ed41
CW		 3030 goto nla_put_failure;
3031#endif
3032 }
3033 }
d342894c 3034
0dfbdf41
TG		 3035 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
3036 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
e4f67add
DS		 3037 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
3038 !!(vxlan->flags & VXLAN_F_LEARN)) ||
3039 nla_put_u8(skb, IFLA_VXLAN_PROXY,
3040 !!(vxlan->flags & VXLAN_F_PROXY)) ||
3041 nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) ||
3042 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
3043 !!(vxlan->flags & VXLAN_F_L2MISS)) ||
3044 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
3045 !!(vxlan->flags & VXLAN_F_L3MISS)) ||
da8b43c0
AS		 3046 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
3047 !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) ||
0dfbdf41
TG		 3048 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
3049 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
3050 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
359a0ea9
TH		 3051 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
3052 !!(vxlan->flags & VXLAN_F_UDP_CSUM)) ||
3053 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
3054 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
3055 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
dfd8645e
TH		 3056 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
3057 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
3058 !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) ||
3059 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
3060 !!(vxlan->flags & VXLAN_F_REMCSUM_RX)))
d342894c 3061 goto nla_put_failure;
3062
05f47d69 3063 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
3064 goto nla_put_failure;
3065
3511494c
TG		 3066 if (vxlan->flags & VXLAN_F_GBP &&
3067 nla_put_flag(skb, IFLA_VXLAN_GBP))
3068 goto nla_put_failure;
3069
0ace2ca8
TH		 3070 if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL &&
3071 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3072 goto nla_put_failure;
3073
d342894c 3074 return 0;
3075
3076nla_put_failure:
3077 return -EMSGSIZE;
3078}
3079
1728d4fa
ND		 3080static struct net *vxlan_get_link_net(const struct net_device *dev)
3081{
3082 struct vxlan_dev *vxlan = netdev_priv(dev);
3083
3084 return vxlan->net;
3085}
3086
d342894c 3087static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3088 .kind = "vxlan",
3089 .maxtype = IFLA_VXLAN_MAX,
3090 .policy = vxlan_policy,
3091 .priv_size = sizeof(struct vxlan_dev),
3092 .setup = vxlan_setup,
3093 .validate = vxlan_validate,
3094 .newlink = vxlan_newlink,
3095 .dellink = vxlan_dellink,
3096 .get_size = vxlan_get_size,
3097 .fill_info = vxlan_fill_info,
1728d4fa 3098 .get_link_net = vxlan_get_link_net,
d342894c 3099};
3100
acaf4e70
DB		 3101static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3102 struct net_device *dev)
3103{
3104 struct vxlan_dev *vxlan, *next;
3105 LIST_HEAD(list_kill);
3106
3107 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3108 struct vxlan_rdst *dst = &vxlan->default_dst;
3109
3110 /* In case we created vxlan device with carrier
3111 * and we loose the carrier due to module unload
3112 * we also need to remove vxlan device. In other
3113 * cases, it's not necessary and remote_ifindex
3114 * is 0 here, so no matches.
3115 */
3116 if (dst->remote_ifindex == dev->ifindex)
3117 vxlan_dellink(vxlan->dev, &list_kill);
3118 }
3119
3120 unregister_netdevice_many(&list_kill);
3121}
3122
3123static int vxlan_lowerdev_event(struct notifier_block *unused,
3124 unsigned long event, void *ptr)
3125{
3126 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
783c1463 3127 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
acaf4e70 3128
783c1463 3129 if (event == NETDEV_UNREGISTER)
acaf4e70
DB		 3130 vxlan_handle_lowerdev_unregister(vn, dev);
3131
3132 return NOTIFY_DONE;
3133}
3134
3135static struct notifier_block vxlan_notifier_block __read_mostly = {
3136 .notifier_call = vxlan_lowerdev_event,
3137};
3138
d342894c 3139static __net_init int vxlan_init_net(struct net *net)
3140{
3141 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
31fec5aa 3142 unsigned int h;
d342894c 3143
553675fb 3144 INIT_LIST_HEAD(&vn->vxlan_list);
1c51a915 3145 spin_lock_init(&vn->sock_lock);
d342894c 3146
553675fb 3147 for (h = 0; h < PORT_HASH_SIZE; ++h)
3148 INIT_HLIST_HEAD(&vn->sock_list[h]);
d342894c 3149
3150 return 0;
3151}
3152
f01ec1c0
ND		 3153static void __net_exit vxlan_exit_net(struct net *net)
3154{
3155 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3156 struct vxlan_dev *vxlan, *next;
3157 struct net_device *dev, *aux;
3158 LIST_HEAD(list);
3159
3160 rtnl_lock();
3161 for_each_netdev_safe(net, dev, aux)
3162 if (dev->rtnl_link_ops == &vxlan_link_ops)
3163 unregister_netdevice_queue(dev, &list);
3164
3165 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3166 /* If vxlan->dev is in the same netns, it has already been added
3167 * to the list by the previous loop.
3168 */
58ce31cc
TH		 3169 if (!net_eq(dev_net(vxlan->dev), net)) {
3170 gro_cells_destroy(&vxlan->gro_cells);
13c3ed6a 3171 unregister_netdevice_queue(vxlan->dev, &list);
58ce31cc 3172 }
f01ec1c0
ND		 3173 }
3174
3175 unregister_netdevice_many(&list);
3176 rtnl_unlock();
3177}
3178
d342894c 3179static struct pernet_operations vxlan_net_ops = {
3180 .init = vxlan_init_net,
f01ec1c0 3181 .exit = vxlan_exit_net,
d342894c 3182 .id = &vxlan_net_id,
3183 .size = sizeof(struct vxlan_net),
3184};
3185
3186static int __init vxlan_init_module(void)
3187{
3188 int rc;
3189
758c57d1
SH		 3190 vxlan_wq = alloc_workqueue("vxlan", 0, 0);
3191 if (!vxlan_wq)
3192 return -ENOMEM;
3193
d342894c 3194 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3195
783c1463 3196 rc = register_pernet_subsys(&vxlan_net_ops);
d342894c 3197 if (rc)
3198 goto out1;
3199
acaf4e70 3200 rc = register_netdevice_notifier(&vxlan_notifier_block);
d342894c 3201 if (rc)
3202 goto out2;
3203
acaf4e70
DB		 3204 rc = rtnl_link_register(&vxlan_link_ops);
3205 if (rc)
3206 goto out3;
d342894c 3207
acaf4e70
DB		 3208 return 0;
3209out3:
3210 unregister_netdevice_notifier(&vxlan_notifier_block);
d342894c 3211out2:
783c1463 3212 unregister_pernet_subsys(&vxlan_net_ops);
d342894c 3213out1:
758c57d1 3214 destroy_workqueue(vxlan_wq);
d342894c 3215 return rc;
3216}
7332a13b 3217late_initcall(vxlan_init_module);
d342894c 3218
3219static void __exit vxlan_cleanup_module(void)
3220{
b7153984 3221 rtnl_link_unregister(&vxlan_link_ops);
acaf4e70 3222 unregister_netdevice_notifier(&vxlan_notifier_block);
758c57d1 3223 destroy_workqueue(vxlan_wq);
783c1463
DB		 3224 unregister_pernet_subsys(&vxlan_net_ops);
3225 /* rcu_barrier() is called by netns */
d342894c 3226}
3227module_exit(vxlan_cleanup_module);
3228
3229MODULE_LICENSE("GPL");
3230MODULE_VERSION(VXLAN_VERSION);
3b8df3c6 3231MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
ead5139a 3232MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
d342894c 3233MODULE_ALIAS_RTNL_LINK("vxlan");
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