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ip_tunnels: record IP version in tunnel info
[deliverable/linux.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>
acbf74a7 45#include <net/udp_tunnel.h>
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
afbd8bae
MR		 76static const u8 all_zeros_mac[ETH_ALEN];
77
614732ea
TG		 78static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
79 bool no_share, u32 flags);
80
553675fb 81/* per-network namespace private data for this module */
82struct vxlan_net {
83 struct list_head vxlan_list;
84 struct hlist_head sock_list[PORT_HASH_SIZE];
1c51a915 85 spinlock_t sock_lock;
553675fb 86};
87
d342894c 88/* Forwarding table entry */
89struct vxlan_fdb {
90 struct hlist_node hlist; /* linked list of entries */
91 struct rcu_head rcu;
92 unsigned long updated; /* jiffies */
93 unsigned long used;
3e61aa8f 94 struct list_head remotes;
7177a3b0 95 u8 eth_addr[ETH_ALEN];
d342894c 96 u16 state; /* see ndm_state */
ae884082 97 u8 flags; /* see ndm_flags */
d342894c 98};
99
d342894c 100/* salt for hash table */
101static u32 vxlan_salt __read_mostly;
758c57d1 102static struct workqueue_struct *vxlan_wq;
d342894c 103
ee122c79
TG		 104static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
105{
e7030878
TG		 106 return vs->flags & VXLAN_F_COLLECT_METADATA ||
107 ip_tunnel_collect_metadata();
ee122c79
TG		 108}
109
e4c7ed41
CW		 110#if IS_ENABLED(CONFIG_IPV6)
111static inline
112bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
113{
f0ef3126
JB		 114 if (a->sa.sa_family != b->sa.sa_family)
115 return false;
116 if (a->sa.sa_family == AF_INET6)
117 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
118 else
119 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 120}
121
122static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
123{
f0ef3126
JB		 124 if (ipa->sa.sa_family == AF_INET6)
125 return ipv6_addr_any(&ipa->sin6.sin6_addr);
126 else
127 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 128}
129
130static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
131{
f0ef3126
JB		 132 if (ipa->sa.sa_family == AF_INET6)
133 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
134 else
135 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 136}
137
138static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
139{
f0ef3126 140 if (nla_len(nla) >= sizeof(struct in6_addr)) {
67b61f6c 141 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
f0ef3126
JB		 142 ip->sa.sa_family = AF_INET6;
143 return 0;
144 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 145 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 146 ip->sa.sa_family = AF_INET;
147 return 0;
148 } else {
149 return -EAFNOSUPPORT;
150 }
e4c7ed41
CW		 151}
152
153static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 154 const union vxlan_addr *ip)
e4c7ed41 155{
f0ef3126 156 if (ip->sa.sa_family == AF_INET6)
930345ea 157 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
f0ef3126 158 else
930345ea 159 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 160}
161
162#else /* !CONFIG_IPV6 */
163
164static inline
165bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
166{
f0ef3126 167 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 168}
169
170static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
171{
f0ef3126 172 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 173}
174
175static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
176{
f0ef3126 177 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 178}
179
180static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
181{
f0ef3126
JB		 182 if (nla_len(nla) >= sizeof(struct in6_addr)) {
183 return -EAFNOSUPPORT;
184 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 185 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 186 ip->sa.sa_family = AF_INET;
187 return 0;
188 } else {
189 return -EAFNOSUPPORT;
190 }
e4c7ed41
CW		 191}
192
193static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 194 const union vxlan_addr *ip)
e4c7ed41 195{
930345ea 196 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 197}
198#endif
199
553675fb 200/* Virtual Network hash table head */
201static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id)
202{
203 return &vs->vni_list[hash_32(id, VNI_HASH_BITS)];
204}
205
206/* Socket hash table head */
207static inline struct hlist_head *vs_head(struct net *net, __be16 port)
d342894c 208{
209 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
210
553675fb 211 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
212}
213
3e61aa8f
SH		 214/* First remote destination for a forwarding entry.
215 * Guaranteed to be non-NULL because remotes are never deleted.
216 */
5ca5461c 217static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
3e61aa8f 218{
5ca5461c 219 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
220}
221
222static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
223{
224 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
3e61aa8f
SH		 225}
226
ac5132d1
TG		 227/* Find VXLAN socket based on network namespace, address family and UDP port
228 * and enabled unshareable flags.
229 */
230static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
231 __be16 port, u32 flags)
553675fb 232{
233 struct vxlan_sock *vs;
af33c1ad
TH		 234
235 flags &= VXLAN_F_RCV_FLAGS;
553675fb 236
237 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
19ca9fc1 238 if (inet_sk(vs->sock->sk)->inet_sport == port &&
705cc62f 239 vxlan_get_sk_family(vs) == family &&
af33c1ad 240 vs->flags == flags)
553675fb 241 return vs;
242 }
243 return NULL;
d342894c 244}
245
5cfccc5a 246static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id)
d342894c 247{
248 struct vxlan_dev *vxlan;
d342894c 249
553675fb 250 hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) {
c7995c43 251 if (vxlan->default_dst.remote_vni == id)
d342894c 252 return vxlan;
253 }
254
255 return NULL;
256}
257
5cfccc5a 258/* Look up VNI in a per net namespace table */
19ca9fc1 259static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id,
ac5132d1
TG		 260 sa_family_t family, __be16 port,
261 u32 flags)
5cfccc5a
PS		 262{
263 struct vxlan_sock *vs;
264
ac5132d1 265 vs = vxlan_find_sock(net, family, port, flags);
5cfccc5a
PS		 266 if (!vs)
267 return NULL;
268
269 return vxlan_vs_find_vni(vs, id);
270}
271
d342894c 272/* Fill in neighbour message in skbuff. */
273static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
234f5b73
SH		 274 const struct vxlan_fdb *fdb,
275 u32 portid, u32 seq, int type, unsigned int flags,
276 const struct vxlan_rdst *rdst)
d342894c 277{
278 unsigned long now = jiffies;
279 struct nda_cacheinfo ci;
280 struct nlmsghdr *nlh;
281 struct ndmsg *ndm;
e4f67add 282 bool send_ip, send_eth;
d342894c 283
284 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
285 if (nlh == NULL)
286 return -EMSGSIZE;
287
288 ndm = nlmsg_data(nlh);
289 memset(ndm, 0, sizeof(*ndm));
e4f67add
DS		 290
291 send_eth = send_ip = true;
292
293 if (type == RTM_GETNEIGH) {
294 ndm->ndm_family = AF_INET;
e4c7ed41 295 send_ip = !vxlan_addr_any(&rdst->remote_ip);
e4f67add
DS		 296 send_eth = !is_zero_ether_addr(fdb->eth_addr);
297 } else
298 ndm->ndm_family = AF_BRIDGE;
d342894c 299 ndm->ndm_state = fdb->state;
300 ndm->ndm_ifindex = vxlan->dev->ifindex;
ae884082 301 ndm->ndm_flags = fdb->flags;
545469f7 302 ndm->ndm_type = RTN_UNICAST;
d342894c 303
193523bf 304 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
4967082b 305 nla_put_s32(skb, NDA_LINK_NETNSID,
7a0877d4 306 peernet2id_alloc(dev_net(vxlan->dev), vxlan->net)))
193523bf
ND		 307 goto nla_put_failure;
308
e4f67add 309 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
d342894c 310 goto nla_put_failure;
311
e4c7ed41 312 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
6681712d
DS		 313 goto nla_put_failure;
314
0dfbdf41 315 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
6681712d
DS		 316 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
317 goto nla_put_failure;
c7995c43 318 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
60d9d4c6 319 nla_put_u32(skb, NDA_VNI, rdst->remote_vni))
6681712d
DS		 320 goto nla_put_failure;
321 if (rdst->remote_ifindex &&
322 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
d342894c 323 goto nla_put_failure;
324
325 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
326 ci.ndm_confirmed = 0;
327 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
328 ci.ndm_refcnt = 0;
329
330 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
331 goto nla_put_failure;
332
053c095a
JB		 333 nlmsg_end(skb, nlh);
334 return 0;
d342894c 335
336nla_put_failure:
337 nlmsg_cancel(skb, nlh);
338 return -EMSGSIZE;
339}
340
341static inline size_t vxlan_nlmsg_size(void)
342{
343 return NLMSG_ALIGN(sizeof(struct ndmsg))
344 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
e4c7ed41 345 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
73cf3317 346 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
6681712d
DS		 347 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
348 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
4967082b 349 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
d342894c 350 + nla_total_size(sizeof(struct nda_cacheinfo));
351}
352
9e4b93f9
ND		 353static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
354 struct vxlan_rdst *rd, int type)
d342894c 355{
356 struct net *net = dev_net(vxlan->dev);
357 struct sk_buff *skb;
358 int err = -ENOBUFS;
359
360 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
361 if (skb == NULL)
362 goto errout;
363
9e4b93f9 364 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
d342894c 365 if (err < 0) {
366 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
367 WARN_ON(err == -EMSGSIZE);
368 kfree_skb(skb);
369 goto errout;
370 }
371
372 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
373 return;
374errout:
375 if (err < 0)
376 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
377}
378
e4c7ed41 379static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
e4f67add
DS		 380{
381 struct vxlan_dev *vxlan = netdev_priv(dev);
bb3fd687
SH		 382 struct vxlan_fdb f = {
383 .state = NUD_STALE,
384 };
385 struct vxlan_rdst remote = {
e4c7ed41 386 .remote_ip = *ipa, /* goes to NDA_DST */
bb3fd687
SH		 387 .remote_vni = VXLAN_N_VID,
388 };
3e61aa8f 389
9e4b93f9 390 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 391}
392
393static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
394{
bb3fd687
SH		 395 struct vxlan_fdb f = {
396 .state = NUD_STALE,
397 };
9e4b93f9 398 struct vxlan_rdst remote = { };
e4f67add 399
e4f67add
DS		 400 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
401
9e4b93f9 402 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 403}
404
d342894c 405/* Hash Ethernet address */
406static u32 eth_hash(const unsigned char *addr)
407{
408 u64 value = get_unaligned((u64 *)addr);
409
410 /* only want 6 bytes */
411#ifdef __BIG_ENDIAN
d342894c 412 value >>= 16;
321fb991 413#else
414 value <<= 16;
d342894c 415#endif
416 return hash_64(value, FDB_HASH_BITS);
417}
418
419/* Hash chain to use given mac address */
420static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
421 const u8 *mac)
422{
423 return &vxlan->fdb_head[eth_hash(mac)];
424}
425
426/* Look up Ethernet address in forwarding table */
014be2c8 427static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
d342894c 428 const u8 *mac)
d342894c 429{
430 struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
431 struct vxlan_fdb *f;
d342894c 432
b67bfe0d 433 hlist_for_each_entry_rcu(f, head, hlist) {
7367d0b5 434 if (ether_addr_equal(mac, f->eth_addr))
d342894c 435 return f;
436 }
437
438 return NULL;
439}
440
014be2c8
SS		 441static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
442 const u8 *mac)
443{
444 struct vxlan_fdb *f;
445
446 f = __vxlan_find_mac(vxlan, mac);
447 if (f)
448 f->used = jiffies;
449
450 return f;
451}
452
a5e7c10a
MR		 453/* caller should hold vxlan->hash_lock */
454static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
e4c7ed41 455 union vxlan_addr *ip, __be16 port,
a5e7c10a 456 __u32 vni, __u32 ifindex)
6681712d 457{
3e61aa8f 458 struct vxlan_rdst *rd;
6681712d 459
3e61aa8f 460 list_for_each_entry(rd, &f->remotes, list) {
e4c7ed41 461 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
6681712d
DS		 462 rd->remote_port == port &&
463 rd->remote_vni == vni &&
464 rd->remote_ifindex == ifindex)
a5e7c10a 465 return rd;
6681712d 466 }
3e61aa8f 467
a5e7c10a
MR		 468 return NULL;
469}
470
906dc186
TR		 471/* Replace destination of unicast mac */
472static int vxlan_fdb_replace(struct vxlan_fdb *f,
e4c7ed41 473 union vxlan_addr *ip, __be16 port, __u32 vni, __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;
e4c7ed41 484 rd->remote_ip = *ip;
906dc186
TR		 485 rd->remote_port = port;
486 rd->remote_vni = vni;
487 rd->remote_ifindex = ifindex;
488 return 1;
489}
490
a5e7c10a
MR		 491/* Add/update destinations for multicast */
492static int vxlan_fdb_append(struct vxlan_fdb *f,
9e4b93f9
ND		 493 union vxlan_addr *ip, __be16 port, __u32 vni,
494 __u32 ifindex, struct vxlan_rdst **rdp)
a5e7c10a
MR		 495{
496 struct vxlan_rdst *rd;
497
498 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
499 if (rd)
500 return 0;
501
6681712d
DS		 502 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
503 if (rd == NULL)
504 return -ENOBUFS;
e4c7ed41 505 rd->remote_ip = *ip;
6681712d
DS		 506 rd->remote_port = port;
507 rd->remote_vni = vni;
508 rd->remote_ifindex = ifindex;
3e61aa8f
SH		 509
510 list_add_tail_rcu(&rd->list, &f->remotes);
511
9e4b93f9 512 *rdp = rd;
6681712d
DS		 513 return 1;
514}
515
dfd8645e
TH		 516static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
517 unsigned int off,
518 struct vxlanhdr *vh, size_t hdrlen,
0ace2ca8
TH		 519 u32 data, struct gro_remcsum *grc,
520 bool nopartial)
dfd8645e 521{
b7fe10e5 522 size_t start, offset;
dfd8645e
TH		 523
524 if (skb->remcsum_offload)
b7fe10e5 525 return vh;
dfd8645e
TH		 526
527 if (!NAPI_GRO_CB(skb)->csum_valid)
528 return NULL;
529
530 start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
531 offset = start + ((data & VXLAN_RCO_UDP) ?
532 offsetof(struct udphdr, check) :
533 offsetof(struct tcphdr, check));
534
b7fe10e5
TH		 535 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
536 start, offset, grc, nopartial);
dfd8645e
TH		 537
538 skb->remcsum_offload = 1;
539
540 return vh;
541}
542
a2b12f3c
TH		 543static struct sk_buff **vxlan_gro_receive(struct sk_buff **head,
544 struct sk_buff *skb,
545 struct udp_offload *uoff)
dc01e7d3
OG		 546{
547 struct sk_buff *p, **pp = NULL;
548 struct vxlanhdr *vh, *vh2;
9b174d88 549 unsigned int hlen, off_vx;
dc01e7d3 550 int flush = 1;
dfd8645e
TH		 551 struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock,
552 udp_offloads);
553 u32 flags;
26c4f7da
TH		 554 struct gro_remcsum grc;
555
556 skb_gro_remcsum_init(&grc);
dc01e7d3
OG		 557
558 off_vx = skb_gro_offset(skb);
559 hlen = off_vx + sizeof(*vh);
560 vh = skb_gro_header_fast(skb, off_vx);
561 if (skb_gro_header_hard(skb, hlen)) {
562 vh = skb_gro_header_slow(skb, hlen, off_vx);
563 if (unlikely(!vh))
564 goto out;
565 }
dc01e7d3 566
dfd8645e
TH		 567 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
568
569 flags = ntohl(vh->vx_flags);
570
571 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
572 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
0ace2ca8
TH		 573 ntohl(vh->vx_vni), &grc,
574 !!(vs->flags &
575 VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 576
577 if (!vh)
578 goto out;
579 }
580
b7fe10e5
TH		 581 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
582
dc01e7d3
OG		 583 flush = 0;
584
585 for (p = *head; p; p = p->next) {
586 if (!NAPI_GRO_CB(p)->same_flow)
587 continue;
588
589 vh2 = (struct vxlanhdr *)(p->data + off_vx);
3511494c
TG		 590 if (vh->vx_flags != vh2->vx_flags ||
591 vh->vx_vni != vh2->vx_vni) {
dc01e7d3
OG		 592 NAPI_GRO_CB(p)->same_flow = 0;
593 continue;
594 }
dc01e7d3
OG		 595 }
596
9b174d88 597 pp = eth_gro_receive(head, skb);
dc01e7d3 598
dc01e7d3 599out:
26c4f7da 600 skb_gro_remcsum_cleanup(skb, &grc);
dc01e7d3
OG		 601 NAPI_GRO_CB(skb)->flush |= flush;
602
603 return pp;
604}
605
a2b12f3c
TH		 606static int vxlan_gro_complete(struct sk_buff *skb, int nhoff,
607 struct udp_offload *uoff)
dc01e7d3 608{
cfdf1e1b
JG		 609 udp_tunnel_gro_complete(skb, nhoff);
610
9b174d88 611 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
dc01e7d3
OG		 612}
613
53cf5275 614/* Notify netdevs that UDP port started listening */
dc01e7d3 615static void vxlan_notify_add_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 616{
617 struct net_device *dev;
dc01e7d3 618 struct sock *sk = vs->sock->sk;
53cf5275 619 struct net *net = sock_net(sk);
705cc62f 620 sa_family_t sa_family = vxlan_get_sk_family(vs);
35e42379 621 __be16 port = inet_sk(sk)->inet_sport;
dc01e7d3
OG		 622 int err;
623
624 if (sa_family == AF_INET) {
625 err = udp_add_offload(&vs->udp_offloads);
626 if (err)
627 pr_warn("vxlan: udp_add_offload failed with status %d\n", err);
628 }
53cf5275
JG		 629
630 rcu_read_lock();
631 for_each_netdev_rcu(net, dev) {
632 if (dev->netdev_ops->ndo_add_vxlan_port)
633 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
634 port);
635 }
636 rcu_read_unlock();
637}
638
639/* Notify netdevs that UDP port is no more listening */
dc01e7d3 640static void vxlan_notify_del_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 641{
642 struct net_device *dev;
dc01e7d3 643 struct sock *sk = vs->sock->sk;
53cf5275 644 struct net *net = sock_net(sk);
705cc62f 645 sa_family_t sa_family = vxlan_get_sk_family(vs);
35e42379 646 __be16 port = inet_sk(sk)->inet_sport;
53cf5275
JG		 647
648 rcu_read_lock();
649 for_each_netdev_rcu(net, dev) {
650 if (dev->netdev_ops->ndo_del_vxlan_port)
651 dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family,
652 port);
653 }
654 rcu_read_unlock();
dc01e7d3
OG		 655
656 if (sa_family == AF_INET)
657 udp_del_offload(&vs->udp_offloads);
53cf5275
JG		 658}
659
d342894c 660/* Add new entry to forwarding table -- assumes lock held */
661static int vxlan_fdb_create(struct vxlan_dev *vxlan,
e4c7ed41 662 const u8 *mac, union vxlan_addr *ip,
6681712d 663 __u16 state, __u16 flags,
73cf3317 664 __be16 port, __u32 vni, __u32 ifindex,
ae884082 665 __u8 ndm_flags)
d342894c 666{
9e4b93f9 667 struct vxlan_rdst *rd = NULL;
d342894c 668 struct vxlan_fdb *f;
669 int notify = 0;
670
014be2c8 671 f = __vxlan_find_mac(vxlan, mac);
d342894c 672 if (f) {
673 if (flags & NLM_F_EXCL) {
674 netdev_dbg(vxlan->dev,
675 "lost race to create %pM\n", mac);
676 return -EEXIST;
677 }
678 if (f->state != state) {
679 f->state = state;
680 f->updated = jiffies;
681 notify = 1;
682 }
ae884082
DS		 683 if (f->flags != ndm_flags) {
684 f->flags = ndm_flags;
685 f->updated = jiffies;
686 notify = 1;
687 }
906dc186
TR		 688 if ((flags & NLM_F_REPLACE)) {
689 /* Only change unicasts */
690 if (!(is_multicast_ether_addr(f->eth_addr) ||
691 is_zero_ether_addr(f->eth_addr))) {
60840429 692 notify |= vxlan_fdb_replace(f, ip, port, vni,
906dc186 693 ifindex);
906dc186
TR		 694 } else
695 return -EOPNOTSUPP;
696 }
6681712d 697 if ((flags & NLM_F_APPEND) &&
58e4c767
MR		 698 (is_multicast_ether_addr(f->eth_addr) ||
699 is_zero_ether_addr(f->eth_addr))) {
9e4b93f9
ND		 700 int rc = vxlan_fdb_append(f, ip, port, vni, ifindex,
701 &rd);
6681712d
DS		 702
703 if (rc < 0)
704 return rc;
705 notify |= rc;
706 }
d342894c 707 } else {
708 if (!(flags & NLM_F_CREATE))
709 return -ENOENT;
710
0dfbdf41
TG		 711 if (vxlan->cfg.addrmax &&
712 vxlan->addrcnt >= vxlan->cfg.addrmax)
d342894c 713 return -ENOSPC;
714
906dc186
TR		 715 /* Disallow replace to add a multicast entry */
716 if ((flags & NLM_F_REPLACE) &&
717 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
718 return -EOPNOTSUPP;
719
e4c7ed41 720 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
d342894c 721 f = kmalloc(sizeof(*f), GFP_ATOMIC);
722 if (!f)
723 return -ENOMEM;
724
725 notify = 1;
d342894c 726 f->state = state;
ae884082 727 f->flags = ndm_flags;
d342894c 728 f->updated = f->used = jiffies;
3e61aa8f 729 INIT_LIST_HEAD(&f->remotes);
d342894c 730 memcpy(f->eth_addr, mac, ETH_ALEN);
731
9e4b93f9 732 vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
3e61aa8f 733
d342894c 734 ++vxlan->addrcnt;
735 hlist_add_head_rcu(&f->hlist,
736 vxlan_fdb_head(vxlan, mac));
737 }
738
9e4b93f9
ND		 739 if (notify) {
740 if (rd == NULL)
741 rd = first_remote_rtnl(f);
742 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
743 }
d342894c 744
745 return 0;
746}
747
6706c82e 748static void vxlan_fdb_free(struct rcu_head *head)
6681712d
DS		 749{
750 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
3e61aa8f 751 struct vxlan_rdst *rd, *nd;
6681712d 752
3e61aa8f 753 list_for_each_entry_safe(rd, nd, &f->remotes, list)
6681712d 754 kfree(rd);
6681712d
DS		 755 kfree(f);
756}
757
d342894c 758static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
759{
760 netdev_dbg(vxlan->dev,
761 "delete %pM\n", f->eth_addr);
762
763 --vxlan->addrcnt;
9e4b93f9 764 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
d342894c 765
766 hlist_del_rcu(&f->hlist);
6681712d 767 call_rcu(&f->rcu, vxlan_fdb_free);
d342894c 768}
769
f0b074be 770static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
e4c7ed41 771 union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex)
d342894c 772{
6681712d 773 struct net *net = dev_net(vxlan->dev);
e4c7ed41 774 int err;
d342894c 775
f0b074be 776 if (tb[NDA_DST]) {
e4c7ed41
CW		 777 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
778 if (err)
779 return err;
f0b074be 780 } else {
e4c7ed41
CW		 781 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
782 if (remote->sa.sa_family == AF_INET) {
783 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
784 ip->sa.sa_family = AF_INET;
785#if IS_ENABLED(CONFIG_IPV6)
786 } else {
787 ip->sin6.sin6_addr = in6addr_any;
788 ip->sa.sa_family = AF_INET6;
789#endif
790 }
f0b074be 791 }
d342894c 792
6681712d 793 if (tb[NDA_PORT]) {
73cf3317 794 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
6681712d 795 return -EINVAL;
f0b074be
MR		 796 *port = nla_get_be16(tb[NDA_PORT]);
797 } else {
0dfbdf41 798 *port = vxlan->cfg.dst_port;
f0b074be 799 }
6681712d
DS		 800
801 if (tb[NDA_VNI]) {
802 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
803 return -EINVAL;
f0b074be
MR		 804 *vni = nla_get_u32(tb[NDA_VNI]);
805 } else {
806 *vni = vxlan->default_dst.remote_vni;
807 }
6681712d
DS		 808
809 if (tb[NDA_IFINDEX]) {
5abb0029 810 struct net_device *tdev;
6681712d
DS		 811
812 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
813 return -EINVAL;
f0b074be 814 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
73763949 815 tdev = __dev_get_by_index(net, *ifindex);
5abb0029 816 if (!tdev)
6681712d 817 return -EADDRNOTAVAIL;
f0b074be
MR		 818 } else {
819 *ifindex = 0;
820 }
821
822 return 0;
823}
824
825/* Add static entry (via netlink) */
826static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
827 struct net_device *dev,
f6f6424b 828 const unsigned char *addr, u16 vid, u16 flags)
f0b074be
MR		 829{
830 struct vxlan_dev *vxlan = netdev_priv(dev);
831 /* struct net *net = dev_net(vxlan->dev); */
e4c7ed41 832 union vxlan_addr ip;
f0b074be
MR		 833 __be16 port;
834 u32 vni, ifindex;
835 int err;
836
837 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
838 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
839 ndm->ndm_state);
840 return -EINVAL;
841 }
842
843 if (tb[NDA_DST] == NULL)
844 return -EINVAL;
845
846 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
847 if (err)
848 return err;
6681712d 849
5933a7bb
MR		 850 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
851 return -EAFNOSUPPORT;
852
d342894c 853 spin_lock_bh(&vxlan->hash_lock);
e4c7ed41 854 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
73cf3317 855 port, vni, ifindex, ndm->ndm_flags);
d342894c 856 spin_unlock_bh(&vxlan->hash_lock);
857
858 return err;
859}
860
861/* Delete entry (via netlink) */
1690be63
VY		 862static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
863 struct net_device *dev,
f6f6424b 864 const unsigned char *addr, u16 vid)
d342894c 865{
866 struct vxlan_dev *vxlan = netdev_priv(dev);
867 struct vxlan_fdb *f;
bc7892ba 868 struct vxlan_rdst *rd = NULL;
e4c7ed41 869 union vxlan_addr ip;
bc7892ba
MR		 870 __be16 port;
871 u32 vni, ifindex;
872 int err;
873
874 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
875 if (err)
876 return err;
877
878 err = -ENOENT;
d342894c 879
880 spin_lock_bh(&vxlan->hash_lock);
881 f = vxlan_find_mac(vxlan, addr);
bc7892ba
MR		 882 if (!f)
883 goto out;
884
e4c7ed41
CW		 885 if (!vxlan_addr_any(&ip)) {
886 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
bc7892ba
MR		 887 if (!rd)
888 goto out;
889 }
890
891 err = 0;
892
893 /* remove a destination if it's not the only one on the list,
894 * otherwise destroy the fdb entry
895 */
896 if (rd && !list_is_singular(&f->remotes)) {
897 list_del_rcu(&rd->list);
9e4b93f9 898 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
dcdc7a59 899 kfree_rcu(rd, rcu);
bc7892ba 900 goto out;
d342894c 901 }
bc7892ba
MR		 902
903 vxlan_fdb_destroy(vxlan, f);
904
905out:
d342894c 906 spin_unlock_bh(&vxlan->hash_lock);
907
908 return err;
909}
910
911/* Dump forwarding table */
912static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3
JHS		 913 struct net_device *dev,
914 struct net_device *filter_dev, int idx)
d342894c 915{
916 struct vxlan_dev *vxlan = netdev_priv(dev);
917 unsigned int h;
918
919 for (h = 0; h < FDB_HASH_SIZE; ++h) {
920 struct vxlan_fdb *f;
d342894c 921 int err;
922
b67bfe0d 923 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
6681712d 924 struct vxlan_rdst *rd;
6681712d 925
3e61aa8f 926 list_for_each_entry_rcu(rd, &f->remotes, list) {
07a51cd3
AW		 927 if (idx < cb->args[0])
928 goto skip;
929
6681712d
DS		 930 err = vxlan_fdb_info(skb, vxlan, f,
931 NETLINK_CB(cb->skb).portid,
932 cb->nlh->nlmsg_seq,
933 RTM_NEWNEIGH,
934 NLM_F_MULTI, rd);
935 if (err < 0)
3e61aa8f 936 goto out;
3e61aa8f 937skip:
07a51cd3
AW		 938 ++idx;
939 }
d342894c 940 }
941 }
3e61aa8f 942out:
d342894c 943 return idx;
944}
945
946/* Watch incoming packets to learn mapping between Ethernet address
947 * and Tunnel endpoint.
c4b49512 948 * Return true if packet is bogus and should be dropped.
d342894c 949 */
26a41ae6 950static bool vxlan_snoop(struct net_device *dev,
e4c7ed41 951 union vxlan_addr *src_ip, const u8 *src_mac)
d342894c 952{
953 struct vxlan_dev *vxlan = netdev_priv(dev);
954 struct vxlan_fdb *f;
d342894c 955
956 f = vxlan_find_mac(vxlan, src_mac);
957 if (likely(f)) {
5ca5461c 958 struct vxlan_rdst *rdst = first_remote_rcu(f);
3e61aa8f 959
e4c7ed41 960 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip)))
26a41ae6 961 return false;
962
963 /* Don't migrate static entries, drop packets */
eb064c3b 964 if (f->state & NUD_NOARP)
26a41ae6 965 return true;
d342894c 966
967 if (net_ratelimit())
968 netdev_info(dev,
e4c7ed41 969 "%pM migrated from %pIS to %pIS\n",
a4870f79 970 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
d342894c 971
e4c7ed41 972 rdst->remote_ip = *src_ip;
d342894c 973 f->updated = jiffies;
9e4b93f9 974 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
d342894c 975 } else {
976 /* learned new entry */
977 spin_lock(&vxlan->hash_lock);
3bf74b1a 978
979 /* close off race between vxlan_flush and incoming packets */
980 if (netif_running(dev))
981 vxlan_fdb_create(vxlan, src_mac, src_ip,
982 NUD_REACHABLE,
983 NLM_F_EXCL|NLM_F_CREATE,
0dfbdf41 984 vxlan->cfg.dst_port,
3bf74b1a 985 vxlan->default_dst.remote_vni,
986 0, NTF_SELF);
d342894c 987 spin_unlock(&vxlan->hash_lock);
988 }
26a41ae6 989
990 return false;
d342894c 991}
992
d342894c 993/* See if multicast group is already in use by other ID */
95ab0991 994static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
d342894c 995{
553675fb 996 struct vxlan_dev *vxlan;
d342894c 997
95ab0991
G		 998 /* The vxlan_sock is only used by dev, leaving group has
999 * no effect on other vxlan devices.
1000 */
1001 if (atomic_read(&dev->vn_sock->refcnt) == 1)
1002 return false;
1003
553675fb 1004 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
95ab0991 1005 if (!netif_running(vxlan->dev) || vxlan == dev)
553675fb 1006 continue;
d342894c 1007
95ab0991
G		 1008 if (vxlan->vn_sock != dev->vn_sock)
1009 continue;
1010
1011 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1012 &dev->default_dst.remote_ip))
1013 continue;
1014
1015 if (vxlan->default_dst.remote_ifindex !=
1016 dev->default_dst.remote_ifindex)
1017 continue;
1018
1019 return true;
553675fb 1020 }
d342894c 1021
1022 return false;
1023}
1024
614732ea 1025static void vxlan_sock_release(struct vxlan_sock *vs)
7c47cedf 1026{
53cf5275
JG		 1027 struct sock *sk = vs->sock->sk;
1028 struct net *net = sock_net(sk);
1029 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
012a5729 1030
7c47cedf
SH		 1031 if (!atomic_dec_and_test(&vs->refcnt))
1032 return;
d342894c 1033
1c51a915 1034 spin_lock(&vn->sock_lock);
7c47cedf 1035 hlist_del_rcu(&vs->hlist);
dc01e7d3 1036 vxlan_notify_del_rx_port(vs);
1c51a915
SH		 1037 spin_unlock(&vn->sock_lock);
1038
7c47cedf 1039 queue_work(vxlan_wq, &vs->del_work);
d342894c 1040}
1041
56ef9c90 1042/* Update multicast group membership when first VNI on
c4b49512 1043 * multicast address is brought up
7c47cedf 1044 */
56ef9c90 1045static int vxlan_igmp_join(struct vxlan_dev *vxlan)
d342894c 1046{
7c47cedf
SH		 1047 struct vxlan_sock *vs = vxlan->vn_sock;
1048 struct sock *sk = vs->sock->sk;
e4c7ed41
CW		 1049 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1050 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1051 int ret = -EINVAL;
d342894c 1052
d342894c 1053 lock_sock(sk);
e4c7ed41
CW		 1054 if (ip->sa.sa_family == AF_INET) {
1055 struct ip_mreqn mreq = {
1056 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1057 .imr_ifindex = ifindex,
1058 };
1059
56ef9c90 1060 ret = ip_mc_join_group(sk, &mreq);
e4c7ed41
CW		 1061#if IS_ENABLED(CONFIG_IPV6)
1062 } else {
56ef9c90
MRL		 1063 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1064 &ip->sin6.sin6_addr);
e4c7ed41
CW		 1065#endif
1066 }
3fc2de2f 1067 release_sock(sk);
1068
56ef9c90 1069 return ret;
3fc2de2f 1070}
1071
1072/* Inverse of vxlan_igmp_join when last VNI is brought down */
56ef9c90 1073static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
3fc2de2f 1074{
3fc2de2f 1075 struct vxlan_sock *vs = vxlan->vn_sock;
1076 struct sock *sk = vs->sock->sk;
e4c7ed41
CW		 1077 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1078 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1079 int ret = -EINVAL;
3fc2de2f 1080
1081 lock_sock(sk);
e4c7ed41
CW		 1082 if (ip->sa.sa_family == AF_INET) {
1083 struct ip_mreqn mreq = {
1084 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1085 .imr_ifindex = ifindex,
1086 };
1087
56ef9c90 1088 ret = ip_mc_leave_group(sk, &mreq);
e4c7ed41
CW		 1089#if IS_ENABLED(CONFIG_IPV6)
1090 } else {
56ef9c90
MRL		 1091 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1092 &ip->sin6.sin6_addr);
e4c7ed41
CW		 1093#endif
1094 }
d342894c 1095 release_sock(sk);
d342894c 1096
56ef9c90 1097 return ret;
d342894c 1098}
1099
dfd8645e 1100static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh,
0ace2ca8 1101 size_t hdrlen, u32 data, bool nopartial)
dfd8645e
TH		 1102{
1103 size_t start, offset, plen;
dfd8645e 1104
b7fe10e5
TH		 1105 if (skb->remcsum_offload)
1106 return vh;
1107
dfd8645e
TH		 1108 start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
1109 offset = start + ((data & VXLAN_RCO_UDP) ?
1110 offsetof(struct udphdr, check) :
1111 offsetof(struct tcphdr, check));
1112
1113 plen = hdrlen + offset + sizeof(u16);
1114
1115 if (!pskb_may_pull(skb, plen))
1116 return NULL;
1117
1118 vh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
1119
0ace2ca8
TH		 1120 skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset,
1121 nopartial);
dfd8645e
TH		 1122
1123 return vh;
1124}
1125
614732ea
TG		 1126static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb,
1127 struct vxlan_metadata *md, u32 vni,
1128 struct metadata_dst *tun_dst)
1129{
1130 struct iphdr *oip = NULL;
1131 struct ipv6hdr *oip6 = NULL;
1132 struct vxlan_dev *vxlan;
1133 struct pcpu_sw_netstats *stats;
1134 union vxlan_addr saddr;
1135 int err = 0;
1136 union vxlan_addr *remote_ip;
1137
1138 /* For flow based devices, map all packets to VNI 0 */
da8b43c0 1139 if (vs->flags & VXLAN_F_COLLECT_METADATA)
614732ea
TG		 1140 vni = 0;
1141
1142 /* Is this VNI defined? */
1143 vxlan = vxlan_vs_find_vni(vs, vni);
1144 if (!vxlan)
1145 goto drop;
1146
1147 remote_ip = &vxlan->default_dst.remote_ip;
1148 skb_reset_mac_header(skb);
1149 skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev)));
1150 skb->protocol = eth_type_trans(skb, vxlan->dev);
1151 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1152
1153 /* Ignore packet loops (and multicast echo) */
1154 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
1155 goto drop;
1156
1157 /* Re-examine inner Ethernet packet */
1158 if (remote_ip->sa.sa_family == AF_INET) {
1159 oip = ip_hdr(skb);
1160 saddr.sin.sin_addr.s_addr = oip->saddr;
1161 saddr.sa.sa_family = AF_INET;
1162#if IS_ENABLED(CONFIG_IPV6)
1163 } else {
1164 oip6 = ipv6_hdr(skb);
1165 saddr.sin6.sin6_addr = oip6->saddr;
1166 saddr.sa.sa_family = AF_INET6;
1167#endif
1168 }
1169
1170 if (tun_dst) {
1171 skb_dst_set(skb, (struct dst_entry *)tun_dst);
1172 tun_dst = NULL;
1173 }
1174
1175 if ((vxlan->flags & VXLAN_F_LEARN) &&
1176 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source))
1177 goto drop;
1178
1179 skb_reset_network_header(skb);
1180 /* In flow-based mode, GBP is carried in dst_metadata */
da8b43c0 1181 if (!(vs->flags & VXLAN_F_COLLECT_METADATA))
614732ea
TG		 1182 skb->mark = md->gbp;
1183
1184 if (oip6)
1185 err = IP6_ECN_decapsulate(oip6, skb);
1186 if (oip)
1187 err = IP_ECN_decapsulate(oip, skb);
1188
1189 if (unlikely(err)) {
1190 if (log_ecn_error) {
1191 if (oip6)
1192 net_info_ratelimited("non-ECT from %pI6\n",
1193 &oip6->saddr);
1194 if (oip)
1195 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1196 &oip->saddr, oip->tos);
1197 }
1198 if (err > 1) {
1199 ++vxlan->dev->stats.rx_frame_errors;
1200 ++vxlan->dev->stats.rx_errors;
1201 goto drop;
1202 }
1203 }
1204
1205 stats = this_cpu_ptr(vxlan->dev->tstats);
1206 u64_stats_update_begin(&stats->syncp);
1207 stats->rx_packets++;
1208 stats->rx_bytes += skb->len;
1209 u64_stats_update_end(&stats->syncp);
1210
58ce31cc 1211 gro_cells_receive(&vxlan->gro_cells, skb);
614732ea
TG		 1212
1213 return;
1214drop:
1215 if (tun_dst)
1216 dst_release((struct dst_entry *)tun_dst);
1217
1218 /* Consume bad packet */
1219 kfree_skb(skb);
1220}
1221
d342894c 1222/* Callback from net/ipv4/udp.c to receive packets */
1223static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
1224{
ee122c79
TG		 1225 struct metadata_dst *tun_dst = NULL;
1226 struct ip_tunnel_info *info;
5cfccc5a 1227 struct vxlan_sock *vs;
d342894c 1228 struct vxlanhdr *vxh;
3bf39475 1229 u32 flags, vni;
ee122c79
TG		 1230 struct vxlan_metadata _md;
1231 struct vxlan_metadata *md = &_md;
d342894c 1232
d342894c 1233 /* Need Vxlan and inner Ethernet header to be present */
7ce04758 1234 if (!pskb_may_pull(skb, VXLAN_HLEN))
d342894c 1235 goto error;
1236
7ce04758 1237 vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
3bf39475
TH		 1238 flags = ntohl(vxh->vx_flags);
1239 vni = ntohl(vxh->vx_vni);
1240
1241 if (flags & VXLAN_HF_VNI) {
1242 flags &= ~VXLAN_HF_VNI;
1243 } else {
1244 /* VNI flag always required to be set */
1245 goto bad_flags;
d342894c 1246 }
1247
5cfccc5a
PS		 1248 if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB)))
1249 goto drop;
dfd8645e 1250 vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
5cfccc5a 1251
559835ea 1252 vs = rcu_dereference_sk_user_data(sk);
5cfccc5a 1253 if (!vs)
d342894c 1254 goto drop;
d342894c 1255
dfd8645e 1256 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
0ace2ca8
TH		 1257 vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni,
1258 !!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 1259 if (!vxh)
1260 goto drop;
1261
1262 flags &= ~VXLAN_HF_RCO;
40fb70f3 1263 vni &= VXLAN_VNI_MASK;
dfd8645e
TH		 1264 }
1265
ee122c79 1266 if (vxlan_collect_metadata(vs)) {
c29a70d2
PS		 1267 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
1268 cpu_to_be64(vni >> 8), sizeof(*md));
1269
ee122c79
TG		 1270 if (!tun_dst)
1271 goto drop;
1272
1273 info = &tun_dst->u.tun_info;
ee122c79 1274 md = ip_tunnel_info_opts(info, sizeof(*md));
ee122c79
TG		 1275 } else {
1276 memset(md, 0, sizeof(*md));
1277 }
1278
3511494c
TG		 1279 /* For backwards compatibility, only allow reserved fields to be
1280 * used by VXLAN extensions if explicitly requested.
1281 */
1282 if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) {
1283 struct vxlanhdr_gbp *gbp;
1284
1285 gbp = (struct vxlanhdr_gbp *)vxh;
ee122c79
TG		 1286 md->gbp = ntohs(gbp->policy_id);
1287
1288 if (tun_dst)
1289 info->key.tun_flags |= TUNNEL_VXLAN_OPT;
3511494c
TG		 1290
1291 if (gbp->dont_learn)
ee122c79 1292 md->gbp |= VXLAN_GBP_DONT_LEARN;
3511494c
TG		 1293
1294 if (gbp->policy_applied)
ee122c79 1295 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
3511494c
TG		 1296
1297 flags &= ~VXLAN_GBP_USED_BITS;
1298 }
1299
40fb70f3 1300 if (flags || vni & ~VXLAN_VNI_MASK) {
3bf39475
TH		 1301 /* If there are any unprocessed flags remaining treat
1302 * this as a malformed packet. This behavior diverges from
1303 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1304 * in reserved fields are to be ignored. The approach here
c4b49512 1305 * maintains compatibility with previous stack code, and also
3bf39475
TH		 1306 * is more robust and provides a little more security in
1307 * adding extensions to VXLAN.
1308 */
1309
1310 goto bad_flags;
1311 }
1312
614732ea 1313 vxlan_rcv(vs, skb, md, vni >> 8, tun_dst);
5cfccc5a
PS		 1314 return 0;
1315
1316drop:
1317 /* Consume bad packet */
1318 kfree_skb(skb);
1319 return 0;
1320
3bf39475
TH		 1321bad_flags:
1322 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1323 ntohl(vxh->vx_flags), ntohl(vxh->vx_vni));
1324
5cfccc5a 1325error:
ee122c79
TG		 1326 if (tun_dst)
1327 dst_release((struct dst_entry *)tun_dst);
1328
5cfccc5a
PS		 1329 /* Return non vxlan pkt */
1330 return 1;
1331}
1332
e4f67add
DS		 1333static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
1334{
1335 struct vxlan_dev *vxlan = netdev_priv(dev);
1336 struct arphdr *parp;
1337 u8 *arpptr, *sha;
1338 __be32 sip, tip;
1339 struct neighbour *n;
1340
1341 if (dev->flags & IFF_NOARP)
1342 goto out;
1343
1344 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1345 dev->stats.tx_dropped++;
1346 goto out;
1347 }
1348 parp = arp_hdr(skb);
1349
1350 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1351 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1352 parp->ar_pro != htons(ETH_P_IP) ||
1353 parp->ar_op != htons(ARPOP_REQUEST) ||
1354 parp->ar_hln != dev->addr_len ||
1355 parp->ar_pln != 4)
1356 goto out;
1357 arpptr = (u8 *)parp + sizeof(struct arphdr);
1358 sha = arpptr;
1359 arpptr += dev->addr_len; /* sha */
1360 memcpy(&sip, arpptr, sizeof(sip));
1361 arpptr += sizeof(sip);
1362 arpptr += dev->addr_len; /* tha */
1363 memcpy(&tip, arpptr, sizeof(tip));
1364
1365 if (ipv4_is_loopback(tip) ||
1366 ipv4_is_multicast(tip))
1367 goto out;
1368
1369 n = neigh_lookup(&arp_tbl, &tip, dev);
1370
1371 if (n) {
e4f67add
DS		 1372 struct vxlan_fdb *f;
1373 struct sk_buff *reply;
1374
1375 if (!(n->nud_state & NUD_CONNECTED)) {
1376 neigh_release(n);
1377 goto out;
1378 }
1379
1380 f = vxlan_find_mac(vxlan, n->ha);
e4c7ed41 1381 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
e4f67add
DS		 1382 /* bridge-local neighbor */
1383 neigh_release(n);
1384 goto out;
1385 }
1386
1387 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1388 n->ha, sha);
1389
1390 neigh_release(n);
1391
7346135d
DS		 1392 if (reply == NULL)
1393 goto out;
1394
e4f67add
DS		 1395 skb_reset_mac_header(reply);
1396 __skb_pull(reply, skb_network_offset(reply));
1397 reply->ip_summed = CHECKSUM_UNNECESSARY;
1398 reply->pkt_type = PACKET_HOST;
1399
1400 if (netif_rx_ni(reply) == NET_RX_DROP)
1401 dev->stats.rx_dropped++;
e4c7ed41
CW		 1402 } else if (vxlan->flags & VXLAN_F_L3MISS) {
1403 union vxlan_addr ipa = {
1404 .sin.sin_addr.s_addr = tip,
a45e92a5 1405 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1406 };
1407
1408 vxlan_ip_miss(dev, &ipa);
1409 }
e4f67add
DS		 1410out:
1411 consume_skb(skb);
1412 return NETDEV_TX_OK;
1413}
1414
f564f45c 1415#if IS_ENABLED(CONFIG_IPV6)
4b29dba9
DS		 1416static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1417 struct neighbour *n, bool isrouter)
1418{
1419 struct net_device *dev = request->dev;
1420 struct sk_buff *reply;
1421 struct nd_msg *ns, *na;
1422 struct ipv6hdr *pip6;
1423 u8 *daddr;
1424 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1425 int ns_olen;
1426 int i, len;
1427
1428 if (dev == NULL)
1429 return NULL;
1430
1431 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1432 sizeof(*na) + na_olen + dev->needed_tailroom;
1433 reply = alloc_skb(len, GFP_ATOMIC);
1434 if (reply == NULL)
1435 return NULL;
1436
1437 reply->protocol = htons(ETH_P_IPV6);
1438 reply->dev = dev;
1439 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1440 skb_push(reply, sizeof(struct ethhdr));
1441 skb_set_mac_header(reply, 0);
1442
1443 ns = (struct nd_msg *)skb_transport_header(request);
1444
1445 daddr = eth_hdr(request)->h_source;
1446 ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns);
1447 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1448 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1449 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1450 break;
1451 }
1452 }
1453
1454 /* Ethernet header */
1455 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1456 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1457 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1458 reply->protocol = htons(ETH_P_IPV6);
1459
1460 skb_pull(reply, sizeof(struct ethhdr));
1461 skb_set_network_header(reply, 0);
1462 skb_put(reply, sizeof(struct ipv6hdr));
1463
1464 /* IPv6 header */
1465
1466 pip6 = ipv6_hdr(reply);
1467 memset(pip6, 0, sizeof(struct ipv6hdr));
1468 pip6->version = 6;
1469 pip6->priority = ipv6_hdr(request)->priority;
1470 pip6->nexthdr = IPPROTO_ICMPV6;
1471 pip6->hop_limit = 255;
1472 pip6->daddr = ipv6_hdr(request)->saddr;
1473 pip6->saddr = *(struct in6_addr *)n->primary_key;
1474
1475 skb_pull(reply, sizeof(struct ipv6hdr));
1476 skb_set_transport_header(reply, 0);
1477
1478 na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen);
1479
1480 /* Neighbor Advertisement */
1481 memset(na, 0, sizeof(*na)+na_olen);
1482 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1483 na->icmph.icmp6_router = isrouter;
1484 na->icmph.icmp6_override = 1;
1485 na->icmph.icmp6_solicited = 1;
1486 na->target = ns->target;
1487 ether_addr_copy(&na->opt[2], n->ha);
1488 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1489 na->opt[1] = na_olen >> 3;
1490
1491 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1492 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1493 csum_partial(na, sizeof(*na)+na_olen, 0));
1494
1495 pip6->payload_len = htons(sizeof(*na)+na_olen);
1496
1497 skb_push(reply, sizeof(struct ipv6hdr));
1498
1499 reply->ip_summed = CHECKSUM_UNNECESSARY;
1500
1501 return reply;
1502}
1503
f564f45c
CW		 1504static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
1505{
1506 struct vxlan_dev *vxlan = netdev_priv(dev);
4b29dba9 1507 struct nd_msg *msg;
f564f45c
CW		 1508 const struct ipv6hdr *iphdr;
1509 const struct in6_addr *saddr, *daddr;
4b29dba9
DS		 1510 struct neighbour *n;
1511 struct inet6_dev *in6_dev;
f564f45c
CW		 1512
1513 in6_dev = __in6_dev_get(dev);
1514 if (!in6_dev)
1515 goto out;
1516
f564f45c
CW		 1517 iphdr = ipv6_hdr(skb);
1518 saddr = &iphdr->saddr;
1519 daddr = &iphdr->daddr;
1520
f564f45c
CW		 1521 msg = (struct nd_msg *)skb_transport_header(skb);
1522 if (msg->icmph.icmp6_code != 0 ||
1523 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1524 goto out;
1525
4b29dba9
DS		 1526 if (ipv6_addr_loopback(daddr) ||
1527 ipv6_addr_is_multicast(&msg->target))
1528 goto out;
1529
1530 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
f564f45c
CW		 1531
1532 if (n) {
1533 struct vxlan_fdb *f;
4b29dba9 1534 struct sk_buff *reply;
f564f45c
CW		 1535
1536 if (!(n->nud_state & NUD_CONNECTED)) {
1537 neigh_release(n);
1538 goto out;
1539 }
1540
1541 f = vxlan_find_mac(vxlan, n->ha);
1542 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1543 /* bridge-local neighbor */
1544 neigh_release(n);
1545 goto out;
1546 }
1547
4b29dba9
DS		 1548 reply = vxlan_na_create(skb, n,
1549 !!(f ? f->flags & NTF_ROUTER : 0));
1550
f564f45c 1551 neigh_release(n);
4b29dba9
DS		 1552
1553 if (reply == NULL)
1554 goto out;
1555
1556 if (netif_rx_ni(reply) == NET_RX_DROP)
1557 dev->stats.rx_dropped++;
1558
f564f45c 1559 } else if (vxlan->flags & VXLAN_F_L3MISS) {
4b29dba9
DS		 1560 union vxlan_addr ipa = {
1561 .sin6.sin6_addr = msg->target,
a45e92a5 1562 .sin6.sin6_family = AF_INET6,
4b29dba9
DS		 1563 };
1564
f564f45c
CW		 1565 vxlan_ip_miss(dev, &ipa);
1566 }
1567
1568out:
1569 consume_skb(skb);
1570 return NETDEV_TX_OK;
1571}
1572#endif
1573
e4f67add
DS		 1574static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1575{
1576 struct vxlan_dev *vxlan = netdev_priv(dev);
1577 struct neighbour *n;
e4f67add
DS		 1578
1579 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1580 return false;
1581
1582 n = NULL;
1583 switch (ntohs(eth_hdr(skb)->h_proto)) {
1584 case ETH_P_IP:
e15a00aa
CW		 1585 {
1586 struct iphdr *pip;
1587
e4f67add
DS		 1588 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1589 return false;
1590 pip = ip_hdr(skb);
1591 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
e4c7ed41
CW		 1592 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1593 union vxlan_addr ipa = {
1594 .sin.sin_addr.s_addr = pip->daddr,
a45e92a5 1595 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1596 };
1597
1598 vxlan_ip_miss(dev, &ipa);
1599 return false;
1600 }
1601
e4f67add 1602 break;
e15a00aa
CW		 1603 }
1604#if IS_ENABLED(CONFIG_IPV6)
1605 case ETH_P_IPV6:
1606 {
1607 struct ipv6hdr *pip6;
1608
1609 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1610 return false;
1611 pip6 = ipv6_hdr(skb);
1612 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
1613 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1614 union vxlan_addr ipa = {
1615 .sin6.sin6_addr = pip6->daddr,
a45e92a5 1616 .sin6.sin6_family = AF_INET6,
e15a00aa
CW		 1617 };
1618
1619 vxlan_ip_miss(dev, &ipa);
1620 return false;
1621 }
1622
1623 break;
1624 }
1625#endif
e4f67add
DS		 1626 default:
1627 return false;
1628 }
1629
1630 if (n) {
1631 bool diff;
1632
7367d0b5 1633 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
e4f67add
DS		 1634 if (diff) {
1635 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1636 dev->addr_len);
1637 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1638 }
1639 neigh_release(n);
1640 return diff;
e4c7ed41
CW		 1641 }
1642
e4f67add
DS		 1643 return false;
1644}
1645
af33c1ad 1646static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
3511494c
TG		 1647 struct vxlan_metadata *md)
1648{
1649 struct vxlanhdr_gbp *gbp;
1650
db79a621
TG		 1651 if (!md->gbp)
1652 return;
1653
3511494c
TG		 1654 gbp = (struct vxlanhdr_gbp *)vxh;
1655 vxh->vx_flags |= htonl(VXLAN_HF_GBP);
1656
1657 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1658 gbp->dont_learn = 1;
1659
1660 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1661 gbp->policy_applied = 1;
1662
1663 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1664}
1665
e4c7ed41 1666#if IS_ENABLED(CONFIG_IPV6)
79b16aad
DM		 1667static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk,
1668 struct sk_buff *skb,
e4c7ed41
CW		 1669 struct net_device *dev, struct in6_addr *saddr,
1670 struct in6_addr *daddr, __u8 prio, __u8 ttl,
6b6948dd 1671 __be16 src_port, __be16 dst_port, __be32 vni,
af33c1ad 1672 struct vxlan_metadata *md, bool xnet, u32 vxflags)
e4c7ed41 1673{
e4c7ed41 1674 struct vxlanhdr *vxh;
e4c7ed41
CW		 1675 int min_headroom;
1676 int err;
af33c1ad 1677 bool udp_sum = !(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX);
dfd8645e
TH		 1678 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
1679 u16 hdrlen = sizeof(struct vxlanhdr);
1680
af33c1ad 1681 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1682 skb->ip_summed == CHECKSUM_PARTIAL) {
1683 int csum_start = skb_checksum_start_offset(skb);
1684
1685 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1686 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1687 (skb->csum_offset == offsetof(struct udphdr, check) ||
1688 skb->csum_offset == offsetof(struct tcphdr, check))) {
1689 udp_sum = false;
1690 type |= SKB_GSO_TUNNEL_REMCSUM;
1691 }
1692 }
e4c7ed41 1693
f01ec1c0 1694 skb_scrub_packet(skb, xnet);
963a88b3 1695
e4c7ed41
CW		 1696 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
1697 + VXLAN_HLEN + sizeof(struct ipv6hdr)
df8a39de 1698 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
e4c7ed41
CW		 1699
1700 /* Need space for new headers (invalidates iph ptr) */
1701 err = skb_cow_head(skb, min_headroom);
74f47278
PS		 1702 if (unlikely(err)) {
1703 kfree_skb(skb);
1704 goto err;
1705 }
e4c7ed41 1706
5968250c 1707 skb = vlan_hwaccel_push_inside(skb);
74f47278
PS		 1708 if (WARN_ON(!skb)) {
1709 err = -ENOMEM;
1710 goto err;
1711 }
e4c7ed41 1712
b736a623
JG		 1713 skb = iptunnel_handle_offloads(skb, udp_sum, type);
1714 if (IS_ERR(skb)) {
1715 err = -EINVAL;
1716 goto err;
1717 }
1718
e4c7ed41 1719 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
3bf39475 1720 vxh->vx_flags = htonl(VXLAN_HF_VNI);
614732ea 1721 vxh->vx_vni = vni;
e4c7ed41 1722
dfd8645e
TH		 1723 if (type & SKB_GSO_TUNNEL_REMCSUM) {
1724 u32 data = (skb_checksum_start_offset(skb) - hdrlen) >>
1725 VXLAN_RCO_SHIFT;
1726
1727 if (skb->csum_offset == offsetof(struct udphdr, check))
1728 data |= VXLAN_RCO_UDP;
1729
1730 vxh->vx_vni |= htonl(data);
1731 vxh->vx_flags |= htonl(VXLAN_HF_RCO);
1732
1733 if (!skb_is_gso(skb)) {
1734 skb->ip_summed = CHECKSUM_NONE;
1735 skb->encapsulation = 0;
1736 }
1737 }
1738
af33c1ad
TH		 1739 if (vxflags & VXLAN_F_GBP)
1740 vxlan_build_gbp_hdr(vxh, vxflags, md);
3511494c 1741
996c9fd1
TH		 1742 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1743
79b16aad 1744 udp_tunnel6_xmit_skb(dst, sk, skb, dev, saddr, daddr, prio,
d998f8ef 1745 ttl, src_port, dst_port,
af33c1ad 1746 !!(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX));
e4c7ed41 1747 return 0;
74f47278
PS		 1748err:
1749 dst_release(dst);
1750 return err;
e4c7ed41
CW		 1751}
1752#endif
1753
614732ea
TG		 1754static int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
1755 __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
6b6948dd 1756 __be16 src_port, __be16 dst_port, __be32 vni,
614732ea 1757 struct vxlan_metadata *md, bool xnet, u32 vxflags)
49560532
PS		 1758{
1759 struct vxlanhdr *vxh;
649c5b8b 1760 int min_headroom;
49560532 1761 int err;
af33c1ad 1762 bool udp_sum = !!(vxflags & VXLAN_F_UDP_CSUM);
dfd8645e
TH		 1763 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
1764 u16 hdrlen = sizeof(struct vxlanhdr);
1765
af33c1ad 1766 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1767 skb->ip_summed == CHECKSUM_PARTIAL) {
1768 int csum_start = skb_checksum_start_offset(skb);
1769
1770 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1771 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1772 (skb->csum_offset == offsetof(struct udphdr, check) ||
1773 skb->csum_offset == offsetof(struct tcphdr, check))) {
1774 udp_sum = false;
1775 type |= SKB_GSO_TUNNEL_REMCSUM;
1776 }
1777 }
49560532 1778
649c5b8b 1779 min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
1eaa8178 1780 + VXLAN_HLEN + sizeof(struct iphdr)
df8a39de 1781 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
649c5b8b
PS		 1782
1783 /* Need space for new headers (invalidates iph ptr) */
1784 err = skb_cow_head(skb, min_headroom);
74f47278
PS		 1785 if (unlikely(err)) {
1786 kfree_skb(skb);
649c5b8b 1787 return err;
74f47278 1788 }
649c5b8b 1789
5968250c
JP		 1790 skb = vlan_hwaccel_push_inside(skb);
1791 if (WARN_ON(!skb))
1792 return -ENOMEM;
1eaa8178 1793
b736a623
JG		 1794 skb = iptunnel_handle_offloads(skb, udp_sum, type);
1795 if (IS_ERR(skb))
1796 return PTR_ERR(skb);
1797
49560532 1798 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
3bf39475 1799 vxh->vx_flags = htonl(VXLAN_HF_VNI);
614732ea 1800 vxh->vx_vni = vni;
49560532 1801
dfd8645e
TH		 1802 if (type & SKB_GSO_TUNNEL_REMCSUM) {
1803 u32 data = (skb_checksum_start_offset(skb) - hdrlen) >>
1804 VXLAN_RCO_SHIFT;
1805
1806 if (skb->csum_offset == offsetof(struct udphdr, check))
1807 data |= VXLAN_RCO_UDP;
1808
1809 vxh->vx_vni |= htonl(data);
1810 vxh->vx_flags |= htonl(VXLAN_HF_RCO);
1811
1812 if (!skb_is_gso(skb)) {
1813 skb->ip_summed = CHECKSUM_NONE;
1814 skb->encapsulation = 0;
1815 }
1816 }
1817
af33c1ad
TH		 1818 if (vxflags & VXLAN_F_GBP)
1819 vxlan_build_gbp_hdr(vxh, vxflags, md);
3511494c 1820
996c9fd1
TH		 1821 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1822
79b16aad 1823 return udp_tunnel_xmit_skb(rt, sk, skb, src, dst, tos,
d998f8ef 1824 ttl, df, src_port, dst_port, xnet,
af33c1ad 1825 !(vxflags & VXLAN_F_UDP_CSUM));
49560532 1826}
49560532 1827
9dcc71e1
SS		 1828/* Bypass encapsulation if the destination is local */
1829static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
1830 struct vxlan_dev *dst_vxlan)
1831{
8f84985f 1832 struct pcpu_sw_netstats *tx_stats, *rx_stats;
e4c7ed41
CW		 1833 union vxlan_addr loopback;
1834 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
ce6502a8
LR		 1835 struct net_device *dev = skb->dev;
1836 int len = skb->len;
9dcc71e1 1837
8f84985f
LR		 1838 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
1839 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
9dcc71e1
SS		 1840 skb->pkt_type = PACKET_HOST;
1841 skb->encapsulation = 0;
1842 skb->dev = dst_vxlan->dev;
1843 __skb_pull(skb, skb_network_offset(skb));
1844
e4c7ed41
CW		 1845 if (remote_ip->sa.sa_family == AF_INET) {
1846 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1847 loopback.sa.sa_family = AF_INET;
1848#if IS_ENABLED(CONFIG_IPV6)
1849 } else {
1850 loopback.sin6.sin6_addr = in6addr_loopback;
1851 loopback.sa.sa_family = AF_INET6;
1852#endif
1853 }
1854
9dcc71e1 1855 if (dst_vxlan->flags & VXLAN_F_LEARN)
e4c7ed41 1856 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
9dcc71e1
SS		 1857
1858 u64_stats_update_begin(&tx_stats->syncp);
1859 tx_stats->tx_packets++;
ce6502a8 1860 tx_stats->tx_bytes += len;
9dcc71e1
SS		 1861 u64_stats_update_end(&tx_stats->syncp);
1862
1863 if (netif_rx(skb) == NET_RX_SUCCESS) {
1864 u64_stats_update_begin(&rx_stats->syncp);
1865 rx_stats->rx_packets++;
ce6502a8 1866 rx_stats->rx_bytes += len;
9dcc71e1
SS		 1867 u64_stats_update_end(&rx_stats->syncp);
1868 } else {
ce6502a8 1869 dev->stats.rx_dropped++;
9dcc71e1
SS		 1870 }
1871}
1872
4ad16930
SH		 1873static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
1874 struct vxlan_rdst *rdst, bool did_rsc)
d342894c 1875{
3093fbe7 1876 struct ip_tunnel_info *info;
d342894c 1877 struct vxlan_dev *vxlan = netdev_priv(dev);
79b16aad 1878 struct sock *sk = vxlan->vn_sock->sock->sk;
a725e514 1879 unsigned short family = vxlan_get_sk_family(vxlan->vn_sock);
e4c7ed41 1880 struct rtable *rt = NULL;
d342894c 1881 const struct iphdr *old_iph;
d342894c 1882 struct flowi4 fl4;
e4c7ed41 1883 union vxlan_addr *dst;
ee122c79
TG		 1884 union vxlan_addr remote_ip;
1885 struct vxlan_metadata _md;
1886 struct vxlan_metadata *md = &_md;
e4c7ed41 1887 __be16 src_port = 0, dst_port;
234f5b73 1888 u32 vni;
d342894c 1889 __be16 df = 0;
1890 __u8 tos, ttl;
0e6fbc5b 1891 int err;
ee122c79 1892 u32 flags = vxlan->flags;
d342894c 1893
61adedf3 1894 info = skb_tunnel_info(skb);
3093fbe7 1895
ee122c79 1896 if (rdst) {
0dfbdf41 1897 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
ee122c79
TG		 1898 vni = rdst->remote_vni;
1899 dst = &rdst->remote_ip;
1900 } else {
1901 if (!info) {
1902 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1903 dev->name);
1904 goto drop;
1905 }
7f9562a1
JB		 1906 if (family != ip_tunnel_info_af(info))
1907 goto drop;
ee122c79 1908
0dfbdf41 1909 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
ee122c79 1910 vni = be64_to_cpu(info->key.tun_id);
a725e514
JB		 1911 remote_ip.sa.sa_family = family;
1912 if (family == AF_INET)
1913 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
1914 else
1915 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
ee122c79
TG		 1916 dst = &remote_ip;
1917 }
e4f67add 1918
e4c7ed41 1919 if (vxlan_addr_any(dst)) {
e4f67add 1920 if (did_rsc) {
e4f67add 1921 /* short-circuited back to local bridge */
9dcc71e1 1922 vxlan_encap_bypass(skb, vxlan, vxlan);
4ad16930 1923 return;
e4f67add 1924 }
ef59febe 1925 goto drop;
e4f67add 1926 }
ef59febe 1927
d342894c 1928 old_iph = ip_hdr(skb);
1929
0dfbdf41 1930 ttl = vxlan->cfg.ttl;
e4c7ed41 1931 if (!ttl && vxlan_addr_multicast(dst))
d342894c 1932 ttl = 1;
1933
0dfbdf41 1934 tos = vxlan->cfg.tos;
d342894c 1935 if (tos == 1)
206aaafc 1936 tos = ip_tunnel_get_dsfield(old_iph, skb);
d342894c 1937
0dfbdf41
TG		 1938 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
1939 vxlan->cfg.port_max, true);
d342894c 1940
a725e514
JB		 1941 if (info) {
1942 if (info->key.tun_flags & TUNNEL_CSUM)
1943 flags |= VXLAN_F_UDP_CSUM;
1944 else
1945 flags &= ~VXLAN_F_UDP_CSUM;
1946
1947 ttl = info->key.ttl;
1948 tos = info->key.tos;
1949
1950 if (info->options_len)
1951 md = ip_tunnel_info_opts(info, sizeof(*md));
1952 } else {
1953 md->gbp = skb->mark;
1954 }
1955
e4c7ed41 1956 if (dst->sa.sa_family == AF_INET) {
a725e514
JB		 1957 if (info && (info->key.tun_flags & TUNNEL_DONT_FRAGMENT))
1958 df = htons(IP_DF);
ee122c79 1959
e4c7ed41 1960 memset(&fl4, 0, sizeof(fl4));
ee122c79 1961 fl4.flowi4_oif = rdst ? rdst->remote_ifindex : 0;
e4c7ed41 1962 fl4.flowi4_tos = RT_TOS(tos);
239fb791
TG		 1963 fl4.flowi4_mark = skb->mark;
1964 fl4.flowi4_proto = IPPROTO_UDP;
e4c7ed41 1965 fl4.daddr = dst->sin.sin_addr.s_addr;
0dfbdf41 1966 fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr;
e4c7ed41 1967
f01ec1c0 1968 rt = ip_route_output_key(vxlan->net, &fl4);
e4c7ed41
CW		 1969 if (IS_ERR(rt)) {
1970 netdev_dbg(dev, "no route to %pI4\n",
1971 &dst->sin.sin_addr.s_addr);
1972 dev->stats.tx_carrier_errors++;
1973 goto tx_error;
1974 }
d342894c 1975
e4c7ed41
CW		 1976 if (rt->dst.dev == dev) {
1977 netdev_dbg(dev, "circular route to %pI4\n",
1978 &dst->sin.sin_addr.s_addr);
1979 dev->stats.collisions++;
fffc15a5 1980 goto rt_tx_error;
e4c7ed41
CW		 1981 }
1982
1983 /* Bypass encapsulation if the destination is local */
1984 if (rt->rt_flags & RTCF_LOCAL &&
1985 !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
1986 struct vxlan_dev *dst_vxlan;
1987
1988 ip_rt_put(rt);
19ca9fc1 1989 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 1990 dst->sa.sa_family, dst_port,
1991 vxlan->flags);
e4c7ed41
CW		 1992 if (!dst_vxlan)
1993 goto tx_error;
1994 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
1995 return;
1996 }
1997
1998 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
1999 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
79b16aad 2000 err = vxlan_xmit_skb(rt, sk, skb, fl4.saddr,
af33c1ad 2001 dst->sin.sin_addr.s_addr, tos, ttl, df,
614732ea 2002 src_port, dst_port, htonl(vni << 8), md,
af33c1ad 2003 !net_eq(vxlan->net, dev_net(vxlan->dev)),
ee122c79 2004 flags);
74f47278
PS		 2005 if (err < 0) {
2006 /* skb is already freed. */
2007 skb = NULL;
e4c7ed41 2008 goto rt_tx_error;
74f47278
PS		 2009 }
2010
e4c7ed41
CW		 2011 iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
2012#if IS_ENABLED(CONFIG_IPV6)
2013 } else {
e4c7ed41
CW		 2014 struct dst_entry *ndst;
2015 struct flowi6 fl6;
6f264e47 2016 u32 rt6i_flags;
e4c7ed41
CW		 2017
2018 memset(&fl6, 0, sizeof(fl6));
ee122c79 2019 fl6.flowi6_oif = rdst ? rdst->remote_ifindex : 0;
e4c7ed41 2020 fl6.daddr = dst->sin6.sin6_addr;
0dfbdf41 2021 fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr;
239fb791 2022 fl6.flowi6_mark = skb->mark;
8c1bb79f 2023 fl6.flowi6_proto = IPPROTO_UDP;
e4c7ed41 2024
343d60aa 2025 if (ipv6_stub->ipv6_dst_lookup(vxlan->net, sk, &ndst, &fl6)) {
e4c7ed41
CW		 2026 netdev_dbg(dev, "no route to %pI6\n",
2027 &dst->sin6.sin6_addr);
2028 dev->stats.tx_carrier_errors++;
9dcc71e1 2029 goto tx_error;
e4c7ed41 2030 }
d342894c 2031
e4c7ed41
CW		 2032 if (ndst->dev == dev) {
2033 netdev_dbg(dev, "circular route to %pI6\n",
2034 &dst->sin6.sin6_addr);
2035 dst_release(ndst);
2036 dev->stats.collisions++;
2037 goto tx_error;
2038 }
0e6fbc5b 2039
e4c7ed41 2040 /* Bypass encapsulation if the destination is local */
6f264e47
JB		 2041 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
2042 if (rt6i_flags & RTF_LOCAL &&
2043 !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
e4c7ed41
CW		 2044 struct vxlan_dev *dst_vxlan;
2045
2046 dst_release(ndst);
19ca9fc1 2047 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 2048 dst->sa.sa_family, dst_port,
2049 vxlan->flags);
e4c7ed41
CW		 2050 if (!dst_vxlan)
2051 goto tx_error;
2052 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2053 return;
2054 }
49560532 2055
e4c7ed41 2056 ttl = ttl ? : ip6_dst_hoplimit(ndst);
79b16aad 2057 err = vxlan6_xmit_skb(ndst, sk, skb, dev, &fl6.saddr, &fl6.daddr,
614732ea 2058 0, ttl, src_port, dst_port, htonl(vni << 8), md,
af33c1ad 2059 !net_eq(vxlan->net, dev_net(vxlan->dev)),
a725e514 2060 flags);
e4c7ed41
CW		 2061#endif
2062 }
0e6fbc5b 2063
4ad16930 2064 return;
d342894c 2065
2066drop:
2067 dev->stats.tx_dropped++;
2068 goto tx_free;
2069
49560532
PS		 2070rt_tx_error:
2071 ip_rt_put(rt);
d342894c 2072tx_error:
2073 dev->stats.tx_errors++;
2074tx_free:
2075 dev_kfree_skb(skb);
d342894c 2076}
2077
6681712d
DS		 2078/* Transmit local packets over Vxlan
2079 *
2080 * Outer IP header inherits ECN and DF from inner header.
2081 * Outer UDP destination is the VXLAN assigned port.
2082 * source port is based on hash of flow
2083 */
2084static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2085{
2086 struct vxlan_dev *vxlan = netdev_priv(dev);
3093fbe7 2087 const struct ip_tunnel_info *info;
6681712d
DS		 2088 struct ethhdr *eth;
2089 bool did_rsc = false;
8f646c92 2090 struct vxlan_rdst *rdst, *fdst = NULL;
6681712d 2091 struct vxlan_fdb *f;
6681712d 2092
61adedf3 2093 info = skb_tunnel_info(skb);
3093fbe7 2094
6681712d
DS		 2095 skb_reset_mac_header(skb);
2096 eth = eth_hdr(skb);
2097
f564f45c
CW		 2098 if ((vxlan->flags & VXLAN_F_PROXY)) {
2099 if (ntohs(eth->h_proto) == ETH_P_ARP)
2100 return arp_reduce(dev, skb);
2101#if IS_ENABLED(CONFIG_IPV6)
2102 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
91269e39
LR		 2103 pskb_may_pull(skb, sizeof(struct ipv6hdr)
2104 + sizeof(struct nd_msg)) &&
f564f45c
CW		 2105 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2106 struct nd_msg *msg;
2107
2108 msg = (struct nd_msg *)skb_transport_header(skb);
2109 if (msg->icmph.icmp6_code == 0 &&
2110 msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
2111 return neigh_reduce(dev, skb);
2112 }
7a9f526f 2113 eth = eth_hdr(skb);
f564f45c
CW		 2114#endif
2115 }
6681712d 2116
da8b43c0 2117 if (vxlan->flags & VXLAN_F_COLLECT_METADATA &&
46fa062a 2118 info && info->mode & IP_TUNNEL_INFO_TX) {
ee122c79
TG		 2119 vxlan_xmit_one(skb, dev, NULL, false);
2120 return NETDEV_TX_OK;
2121 }
2122
6681712d 2123 f = vxlan_find_mac(vxlan, eth->h_dest);
ae884082
DS		 2124 did_rsc = false;
2125
2126 if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) &&
e15a00aa
CW		 2127 (ntohs(eth->h_proto) == ETH_P_IP ||
2128 ntohs(eth->h_proto) == ETH_P_IPV6)) {
ae884082
DS		 2129 did_rsc = route_shortcircuit(dev, skb);
2130 if (did_rsc)
2131 f = vxlan_find_mac(vxlan, eth->h_dest);
2132 }
2133
6681712d 2134 if (f == NULL) {
afbd8bae
MR		 2135 f = vxlan_find_mac(vxlan, all_zeros_mac);
2136 if (f == NULL) {
2137 if ((vxlan->flags & VXLAN_F_L2MISS) &&
2138 !is_multicast_ether_addr(eth->h_dest))
2139 vxlan_fdb_miss(vxlan, eth->h_dest);
2140
2141 dev->stats.tx_dropped++;
8f646c92 2142 kfree_skb(skb);
afbd8bae
MR		 2143 return NETDEV_TX_OK;
2144 }
2145 }
6681712d 2146
afbd8bae
MR		 2147 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2148 struct sk_buff *skb1;
6681712d 2149
8f646c92
ED		 2150 if (!fdst) {
2151 fdst = rdst;
2152 continue;
2153 }
afbd8bae
MR		 2154 skb1 = skb_clone(skb, GFP_ATOMIC);
2155 if (skb1)
2156 vxlan_xmit_one(skb1, dev, rdst, did_rsc);
6681712d
DS		 2157 }
2158
8f646c92
ED		 2159 if (fdst)
2160 vxlan_xmit_one(skb, dev, fdst, did_rsc);
2161 else
2162 kfree_skb(skb);
4ad16930 2163 return NETDEV_TX_OK;
6681712d
DS		 2164}
2165
d342894c 2166/* Walk the forwarding table and purge stale entries */
2167static void vxlan_cleanup(unsigned long arg)
2168{
2169 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
2170 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2171 unsigned int h;
2172
2173 if (!netif_running(vxlan->dev))
2174 return;
2175
d342894c 2176 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2177 struct hlist_node *p, *n;
14e1d0fa
SD		 2178
2179 spin_lock_bh(&vxlan->hash_lock);
d342894c 2180 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2181 struct vxlan_fdb *f
2182 = container_of(p, struct vxlan_fdb, hlist);
2183 unsigned long timeout;
2184
3c172868 2185 if (f->state & NUD_PERMANENT)
d342894c 2186 continue;
2187
0dfbdf41 2188 timeout = f->used + vxlan->cfg.age_interval * HZ;
d342894c 2189 if (time_before_eq(timeout, jiffies)) {
2190 netdev_dbg(vxlan->dev,
2191 "garbage collect %pM\n",
2192 f->eth_addr);
2193 f->state = NUD_STALE;
2194 vxlan_fdb_destroy(vxlan, f);
2195 } else if (time_before(timeout, next_timer))
2196 next_timer = timeout;
2197 }
14e1d0fa 2198 spin_unlock_bh(&vxlan->hash_lock);
d342894c 2199 }
d342894c 2200
2201 mod_timer(&vxlan->age_timer, next_timer);
2202}
2203
9c2e24e1
PS		 2204static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
2205{
56ef9c90 2206 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
9c2e24e1
PS		 2207 __u32 vni = vxlan->default_dst.remote_vni;
2208
2209 vxlan->vn_sock = vs;
56ef9c90 2210 spin_lock(&vn->sock_lock);
9c2e24e1 2211 hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
56ef9c90 2212 spin_unlock(&vn->sock_lock);
9c2e24e1
PS		 2213}
2214
d342894c 2215/* Setup stats when device is created */
2216static int vxlan_init(struct net_device *dev)
2217{
1c213bd2 2218 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
e8171045 2219 if (!dev->tstats)
d342894c 2220 return -ENOMEM;
2221
2222 return 0;
2223}
2224
ba609e9b 2225static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan)
afbd8bae
MR		 2226{
2227 struct vxlan_fdb *f;
2228
2229 spin_lock_bh(&vxlan->hash_lock);
2230 f = __vxlan_find_mac(vxlan, all_zeros_mac);
2231 if (f)
2232 vxlan_fdb_destroy(vxlan, f);
2233 spin_unlock_bh(&vxlan->hash_lock);
2234}
2235
ebf4063e
SH		 2236static void vxlan_uninit(struct net_device *dev)
2237{
2238 struct vxlan_dev *vxlan = netdev_priv(dev);
ebf4063e 2239
ba609e9b 2240 vxlan_fdb_delete_default(vxlan);
afbd8bae 2241
ebf4063e
SH		 2242 free_percpu(dev->tstats);
2243}
2244
d342894c 2245/* Start ageing timer and join group when device is brought up */
2246static int vxlan_open(struct net_device *dev)
2247{
2248 struct vxlan_dev *vxlan = netdev_priv(dev);
56ef9c90
MRL		 2249 struct vxlan_sock *vs;
2250 int ret = 0;
1c51a915 2251
614732ea
TG		 2252 vs = vxlan_sock_add(vxlan->net, vxlan->cfg.dst_port,
2253 vxlan->cfg.no_share, vxlan->flags);
56ef9c90
MRL		 2254 if (IS_ERR(vs))
2255 return PTR_ERR(vs);
2256
2257 vxlan_vs_add_dev(vs, vxlan);
d342894c 2258
79d4a94f 2259 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
56ef9c90 2260 ret = vxlan_igmp_join(vxlan);
bef0057b
MRL		 2261 if (ret == -EADDRINUSE)
2262 ret = 0;
56ef9c90
MRL		 2263 if (ret) {
2264 vxlan_sock_release(vs);
2265 return ret;
2266 }
d342894c 2267 }
2268
0dfbdf41 2269 if (vxlan->cfg.age_interval)
d342894c 2270 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2271
56ef9c90 2272 return ret;
d342894c 2273}
2274
2275/* Purge the forwarding table */
2276static void vxlan_flush(struct vxlan_dev *vxlan)
2277{
31fec5aa 2278 unsigned int h;
d342894c 2279
2280 spin_lock_bh(&vxlan->hash_lock);
2281 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2282 struct hlist_node *p, *n;
2283 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2284 struct vxlan_fdb *f
2285 = container_of(p, struct vxlan_fdb, hlist);
afbd8bae
MR		 2286 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2287 if (!is_zero_ether_addr(f->eth_addr))
2288 vxlan_fdb_destroy(vxlan, f);
d342894c 2289 }
2290 }
2291 spin_unlock_bh(&vxlan->hash_lock);
2292}
2293
2294/* Cleanup timer and forwarding table on shutdown */
2295static int vxlan_stop(struct net_device *dev)
2296{
2297 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2298 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
1c51a915 2299 struct vxlan_sock *vs = vxlan->vn_sock;
56ef9c90 2300 int ret = 0;
d342894c 2301
24c0e683 2302 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
f13b1689 2303 !vxlan_group_used(vn, vxlan))
56ef9c90 2304 ret = vxlan_igmp_leave(vxlan);
d342894c 2305
2306 del_timer_sync(&vxlan->age_timer);
2307
2308 vxlan_flush(vxlan);
56ef9c90 2309 vxlan_sock_release(vs);
d342894c 2310
56ef9c90 2311 return ret;
d342894c 2312}
2313
d342894c 2314/* Stub, nothing needs to be done. */
2315static void vxlan_set_multicast_list(struct net_device *dev)
2316{
2317}
2318
345010b5
DB		 2319static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2320{
2321 struct vxlan_dev *vxlan = netdev_priv(dev);
2322 struct vxlan_rdst *dst = &vxlan->default_dst;
2323 struct net_device *lowerdev;
2324 int max_mtu;
2325
f01ec1c0 2326 lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex);
345010b5
DB		 2327 if (lowerdev == NULL)
2328 return eth_change_mtu(dev, new_mtu);
2329
2330 if (dst->remote_ip.sa.sa_family == AF_INET6)
2331 max_mtu = lowerdev->mtu - VXLAN6_HEADROOM;
2332 else
2333 max_mtu = lowerdev->mtu - VXLAN_HEADROOM;
2334
2335 if (new_mtu < 68 || new_mtu > max_mtu)
2336 return -EINVAL;
2337
2338 dev->mtu = new_mtu;
2339 return 0;
2340}
2341
d342894c 2342static const struct net_device_ops vxlan_netdev_ops = {
2343 .ndo_init = vxlan_init,
ebf4063e 2344 .ndo_uninit = vxlan_uninit,
d342894c 2345 .ndo_open = vxlan_open,
2346 .ndo_stop = vxlan_stop,
2347 .ndo_start_xmit = vxlan_xmit,
e8171045 2348 .ndo_get_stats64 = ip_tunnel_get_stats64,
d342894c 2349 .ndo_set_rx_mode = vxlan_set_multicast_list,
345010b5 2350 .ndo_change_mtu = vxlan_change_mtu,
d342894c 2351 .ndo_validate_addr = eth_validate_addr,
2352 .ndo_set_mac_address = eth_mac_addr,
2353 .ndo_fdb_add = vxlan_fdb_add,
2354 .ndo_fdb_del = vxlan_fdb_delete,
2355 .ndo_fdb_dump = vxlan_fdb_dump,
2356};
2357
2358/* Info for udev, that this is a virtual tunnel endpoint */
2359static struct device_type vxlan_type = {
2360 .name = "vxlan",
2361};
2362
53cf5275 2363/* Calls the ndo_add_vxlan_port of the caller in order to
35e42379
JG		 2364 * supply the listening VXLAN udp ports. Callers are expected
2365 * to implement the ndo_add_vxlan_port.
53cf5275
JG		 2366 */
2367void vxlan_get_rx_port(struct net_device *dev)
2368{
2369 struct vxlan_sock *vs;
2370 struct net *net = dev_net(dev);
2371 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2372 sa_family_t sa_family;
35e42379
JG		 2373 __be16 port;
2374 unsigned int i;
53cf5275
JG		 2375
2376 spin_lock(&vn->sock_lock);
2377 for (i = 0; i < PORT_HASH_SIZE; ++i) {
35e42379
JG		 2378 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2379 port = inet_sk(vs->sock->sk)->inet_sport;
705cc62f 2380 sa_family = vxlan_get_sk_family(vs);
53cf5275
JG		 2381 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
2382 port);
2383 }
2384 }
2385 spin_unlock(&vn->sock_lock);
2386}
2387EXPORT_SYMBOL_GPL(vxlan_get_rx_port);
2388
d342894c 2389/* Initialize the device structure. */
2390static void vxlan_setup(struct net_device *dev)
2391{
2392 struct vxlan_dev *vxlan = netdev_priv(dev);
31fec5aa 2393 unsigned int h;
d342894c 2394
2395 eth_hw_addr_random(dev);
2396 ether_setup(dev);
e4c7ed41 2397 if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6)
2853af6a 2398 dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM;
e4c7ed41 2399 else
2853af6a 2400 dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM;
d342894c 2401
2402 dev->netdev_ops = &vxlan_netdev_ops;
ebf4063e 2403 dev->destructor = free_netdev;
d342894c 2404 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2405
d342894c 2406 dev->features |= NETIF_F_LLTX;
d6727fe3 2407 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
0afb1666 2408 dev->features |= NETIF_F_RXCSUM;
05c0db08 2409 dev->features |= NETIF_F_GSO_SOFTWARE;
0afb1666 2410
1eaa8178
PS		 2411 dev->vlan_features = dev->features;
2412 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
0afb1666 2413 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
05c0db08 2414 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1eaa8178 2415 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
02875878 2416 netif_keep_dst(dev);
22dba393 2417 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
d342894c 2418
553675fb 2419 INIT_LIST_HEAD(&vxlan->next);
d342894c 2420 spin_lock_init(&vxlan->hash_lock);
2421
2422 init_timer_deferrable(&vxlan->age_timer);
2423 vxlan->age_timer.function = vxlan_cleanup;
2424 vxlan->age_timer.data = (unsigned long) vxlan;
2425
0dfbdf41 2426 vxlan->cfg.dst_port = htons(vxlan_port);
05f47d69 2427
d342894c 2428 vxlan->dev = dev;
2429
58ce31cc
TH		 2430 gro_cells_init(&vxlan->gro_cells, dev);
2431
d342894c 2432 for (h = 0; h < FDB_HASH_SIZE; ++h)
2433 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2434}
2435
2436static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2437 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
5d174dd8 2438 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
e4c7ed41 2439 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
d342894c 2440 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2441 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
e4c7ed41 2442 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
d342894c 2443 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2444 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
2445 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2446 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2447 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
05f47d69 2448 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
e4f67add
DS		 2449 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2450 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2451 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2452 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
f8a9b1bc 2453 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
823aa873 2454 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
5c91ae08
TH		 2455 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2456 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2457 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
dfd8645e
TH		 2458 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2459 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
3511494c 2460 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
0ace2ca8 2461 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
d342894c 2462};
2463
2464static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
2465{
2466 if (tb[IFLA_ADDRESS]) {
2467 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2468 pr_debug("invalid link address (not ethernet)\n");
2469 return -EINVAL;
2470 }
2471
2472 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2473 pr_debug("invalid all zero ethernet address\n");
2474 return -EADDRNOTAVAIL;
2475 }
2476 }
2477
2478 if (!data)
2479 return -EINVAL;
2480
2481 if (data[IFLA_VXLAN_ID]) {
2482 __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2483 if (id >= VXLAN_VID_MASK)
2484 return -ERANGE;
2485 }
2486
05f47d69 2487 if (data[IFLA_VXLAN_PORT_RANGE]) {
2488 const struct ifla_vxlan_port_range *p
2489 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2490
2491 if (ntohs(p->high) < ntohs(p->low)) {
2492 pr_debug("port range %u .. %u not valid\n",
2493 ntohs(p->low), ntohs(p->high));
2494 return -EINVAL;
2495 }
2496 }
2497
d342894c 2498 return 0;
2499}
2500
1b13c97f
YB		 2501static void vxlan_get_drvinfo(struct net_device *netdev,
2502 struct ethtool_drvinfo *drvinfo)
2503{
2504 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2505 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2506}
2507
2508static const struct ethtool_ops vxlan_ethtool_ops = {
2509 .get_drvinfo = vxlan_get_drvinfo,
2510 .get_link = ethtool_op_get_link,
2511};
2512
553675fb 2513static void vxlan_del_work(struct work_struct *work)
2514{
2515 struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
acbf74a7 2516 udp_tunnel_sock_release(vs->sock);
553675fb 2517 kfree_rcu(vs, rcu);
2518}
2519
3ee64f39
TH		 2520static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2521 __be16 port, u32 flags)
553675fb 2522{
e4c7ed41 2523 struct socket *sock;
3ee64f39
TH		 2524 struct udp_port_cfg udp_conf;
2525 int err;
e4c7ed41 2526
3ee64f39 2527 memset(&udp_conf, 0, sizeof(udp_conf));
e4c7ed41 2528
3ee64f39
TH		 2529 if (ipv6) {
2530 udp_conf.family = AF_INET6;
3ee64f39 2531 udp_conf.use_udp6_rx_checksums =
3dc2b6a8 2532 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
3ee64f39
TH		 2533 } else {
2534 udp_conf.family = AF_INET;
e4c7ed41 2535 }
e4c7ed41 2536
3ee64f39 2537 udp_conf.local_udp_port = port;
553675fb 2538
3ee64f39
TH		 2539 /* Open UDP socket */
2540 err = udp_sock_create(net, &udp_conf, &sock);
2541 if (err < 0)
2542 return ERR_PTR(err);
e4c7ed41 2543
39deb2c7 2544 return sock;
e4c7ed41
CW		 2545}
2546
2547/* Create new listen socket if needed */
2548static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
359a0ea9 2549 u32 flags)
e4c7ed41
CW		 2550{
2551 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2552 struct vxlan_sock *vs;
2553 struct socket *sock;
e4c7ed41 2554 unsigned int h;
359a0ea9 2555 bool ipv6 = !!(flags & VXLAN_F_IPV6);
acbf74a7 2556 struct udp_tunnel_sock_cfg tunnel_cfg;
e4c7ed41 2557
dc01e7d3 2558 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
e4c7ed41
CW		 2559 if (!vs)
2560 return ERR_PTR(-ENOMEM);
2561
2562 for (h = 0; h < VNI_HASH_SIZE; ++h)
2563 INIT_HLIST_HEAD(&vs->vni_list[h]);
2564
2565 INIT_WORK(&vs->del_work, vxlan_del_work);
2566
3ee64f39 2567 sock = vxlan_create_sock(net, ipv6, port, flags);
39deb2c7 2568 if (IS_ERR(sock)) {
56ef9c90
MRL		 2569 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port),
2570 PTR_ERR(sock));
553675fb 2571 kfree(vs);
e50fddc8 2572 return ERR_CAST(sock);
553675fb 2573 }
e4c7ed41
CW		 2574
2575 vs->sock = sock;
9c2e24e1 2576 atomic_set(&vs->refcnt, 1);
af33c1ad 2577 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
553675fb 2578
dc01e7d3
OG		 2579 /* Initialize the vxlan udp offloads structure */
2580 vs->udp_offloads.port = port;
2581 vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive;
2582 vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete;
2583
9c2e24e1
PS		 2584 spin_lock(&vn->sock_lock);
2585 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
dc01e7d3 2586 vxlan_notify_add_rx_port(vs);
9c2e24e1 2587 spin_unlock(&vn->sock_lock);
553675fb 2588
2589 /* Mark socket as an encapsulation socket. */
acbf74a7
AZ		 2590 tunnel_cfg.sk_user_data = vs;
2591 tunnel_cfg.encap_type = 1;
2592 tunnel_cfg.encap_rcv = vxlan_udp_encap_recv;
2593 tunnel_cfg.encap_destroy = NULL;
2594
2595 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
e4c7ed41 2596
9c2e24e1
PS		 2597 return vs;
2598}
2599
614732ea
TG		 2600static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
2601 bool no_share, u32 flags)
9c2e24e1
PS		 2602{
2603 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2604 struct vxlan_sock *vs;
19ca9fc1 2605 bool ipv6 = flags & VXLAN_F_IPV6;
9c2e24e1 2606
56ef9c90
MRL		 2607 if (!no_share) {
2608 spin_lock(&vn->sock_lock);
2609 vs = vxlan_find_sock(net, ipv6 ? AF_INET6 : AF_INET, port,
2610 flags);
614732ea 2611 if (vs) {
56ef9c90
MRL		 2612 if (!atomic_add_unless(&vs->refcnt, 1, 0))
2613 vs = ERR_PTR(-EBUSY);
2614 spin_unlock(&vn->sock_lock);
2615 return vs;
2616 }
2617 spin_unlock(&vn->sock_lock);
2618 }
9c2e24e1 2619
614732ea 2620 return vxlan_socket_create(net, port, flags);
553675fb 2621}
2622
0dfbdf41
TG		 2623static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
2624 struct vxlan_config *conf)
d342894c 2625{
33564bbb 2626 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
d342894c 2627 struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 2628 struct vxlan_rdst *dst = &vxlan->default_dst;
d342894c 2629 int err;
e4c7ed41 2630 bool use_ipv6 = false;
0dfbdf41 2631 __be16 default_port = vxlan->cfg.dst_port;
d342894c 2632
33564bbb 2633 vxlan->net = src_net;
f01ec1c0 2634
0dfbdf41 2635 dst->remote_vni = conf->vni;
d342894c 2636
0dfbdf41 2637 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
d342894c 2638
0dfbdf41
TG		 2639 /* Unless IPv6 is explicitly requested, assume IPv4 */
2640 if (!dst->remote_ip.sa.sa_family)
2641 dst->remote_ip.sa.sa_family = AF_INET;
e4c7ed41 2642
0dfbdf41
TG		 2643 if (dst->remote_ip.sa.sa_family == AF_INET6 ||
2644 vxlan->cfg.saddr.sa.sa_family == AF_INET6)
e4c7ed41 2645 use_ipv6 = true;
d342894c 2646
0dfbdf41 2647 if (conf->remote_ifindex) {
34e02aa1 2648 struct net_device *lowerdev
0dfbdf41
TG		 2649 = __dev_get_by_index(src_net, conf->remote_ifindex);
2650
2651 dst->remote_ifindex = conf->remote_ifindex;
34e02aa1 2652
2653 if (!lowerdev) {
c7995c43 2654 pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
34e02aa1 2655 return -ENODEV;
2656 }
d342894c 2657
e4c7ed41
CW		 2658#if IS_ENABLED(CONFIG_IPV6)
2659 if (use_ipv6) {
2660 struct inet6_dev *idev = __in6_dev_get(lowerdev);
2661 if (idev && idev->cnf.disable_ipv6) {
2662 pr_info("IPv6 is disabled via sysctl\n");
2663 return -EPERM;
2664 }
2665 vxlan->flags |= VXLAN_F_IPV6;
2666 }
2667#endif
2668
0dfbdf41 2669 if (!conf->mtu)
e4c7ed41 2670 dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
1ba56fb4 2671
2853af6a 2672 dev->needed_headroom = lowerdev->hard_header_len +
e4c7ed41 2673 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
7bda701e 2674 } else if (use_ipv6)
2675 vxlan->flags |= VXLAN_F_IPV6;
d342894c 2676
0dfbdf41
TG		 2677 memcpy(&vxlan->cfg, conf, sizeof(*conf));
2678 if (!vxlan->cfg.dst_port)
2679 vxlan->cfg.dst_port = default_port;
2680 vxlan->flags |= conf->flags;
2681
2682 if (!vxlan->cfg.age_interval)
2683 vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
2684
2685 if (vxlan_find_vni(src_net, conf->vni, use_ipv6 ? AF_INET6 : AF_INET,
2686 vxlan->cfg.dst_port, vxlan->flags))
2687 return -EEXIST;
2688
2689 dev->ethtool_ops = &vxlan_ethtool_ops;
2690
2691 /* create an fdb entry for a valid default destination */
2692 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
2693 err = vxlan_fdb_create(vxlan, all_zeros_mac,
2694 &vxlan->default_dst.remote_ip,
2695 NUD_REACHABLE|NUD_PERMANENT,
2696 NLM_F_EXCL|NLM_F_CREATE,
2697 vxlan->cfg.dst_port,
2698 vxlan->default_dst.remote_vni,
2699 vxlan->default_dst.remote_ifindex,
2700 NTF_SELF);
2701 if (err)
2702 return err;
2703 }
2704
2705 err = register_netdevice(dev);
2706 if (err) {
2707 vxlan_fdb_delete_default(vxlan);
2708 return err;
2709 }
2710
2711 list_add(&vxlan->next, &vn->vxlan_list);
2712
2713 return 0;
2714}
2715
2716struct net_device *vxlan_dev_create(struct net *net, const char *name,
2717 u8 name_assign_type, struct vxlan_config *conf)
2718{
2719 struct nlattr *tb[IFLA_MAX+1];
2720 struct net_device *dev;
2721 int err;
2722
2723 memset(&tb, 0, sizeof(tb));
2724
2725 dev = rtnl_create_link(net, name, name_assign_type,
2726 &vxlan_link_ops, tb);
2727 if (IS_ERR(dev))
2728 return dev;
2729
2730 err = vxlan_dev_configure(net, dev, conf);
2731 if (err < 0) {
2732 free_netdev(dev);
2733 return ERR_PTR(err);
2734 }
2735
2736 return dev;
2737}
2738EXPORT_SYMBOL_GPL(vxlan_dev_create);
2739
2740static int vxlan_newlink(struct net *src_net, struct net_device *dev,
2741 struct nlattr *tb[], struct nlattr *data[])
2742{
2743 struct vxlan_config conf;
2744 int err;
2745
2746 if (!data[IFLA_VXLAN_ID])
2747 return -EINVAL;
2748
2749 memset(&conf, 0, sizeof(conf));
2750 conf.vni = nla_get_u32(data[IFLA_VXLAN_ID]);
2751
2752 if (data[IFLA_VXLAN_GROUP]) {
2753 conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
2754 } else if (data[IFLA_VXLAN_GROUP6]) {
2755 if (!IS_ENABLED(CONFIG_IPV6))
2756 return -EPFNOSUPPORT;
2757
2758 conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
2759 conf.remote_ip.sa.sa_family = AF_INET6;
2760 }
2761
2762 if (data[IFLA_VXLAN_LOCAL]) {
2763 conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
2764 conf.saddr.sa.sa_family = AF_INET;
2765 } else if (data[IFLA_VXLAN_LOCAL6]) {
2766 if (!IS_ENABLED(CONFIG_IPV6))
2767 return -EPFNOSUPPORT;
2768
2769 /* TODO: respect scope id */
2770 conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
2771 conf.saddr.sa.sa_family = AF_INET6;
2772 }
2773
2774 if (data[IFLA_VXLAN_LINK])
2775 conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
2776
d342894c 2777 if (data[IFLA_VXLAN_TOS])
0dfbdf41 2778 conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
d342894c 2779
afb97186 2780 if (data[IFLA_VXLAN_TTL])
0dfbdf41 2781 conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
afb97186 2782
d342894c 2783 if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
0dfbdf41 2784 conf.flags |= VXLAN_F_LEARN;
d342894c 2785
2786 if (data[IFLA_VXLAN_AGEING])
0dfbdf41 2787 conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
d342894c 2788
e4f67add 2789 if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
0dfbdf41 2790 conf.flags |= VXLAN_F_PROXY;
e4f67add
DS		 2791
2792 if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
0dfbdf41 2793 conf.flags |= VXLAN_F_RSC;
e4f67add
DS		 2794
2795 if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
0dfbdf41 2796 conf.flags |= VXLAN_F_L2MISS;
e4f67add
DS		 2797
2798 if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
0dfbdf41 2799 conf.flags |= VXLAN_F_L3MISS;
e4f67add 2800
d342894c 2801 if (data[IFLA_VXLAN_LIMIT])
0dfbdf41 2802 conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
d342894c 2803
f8a9b1bc
AS		 2804 if (data[IFLA_VXLAN_COLLECT_METADATA] &&
2805 nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
2806 conf.flags |= VXLAN_F_COLLECT_METADATA;
2807
05f47d69 2808 if (data[IFLA_VXLAN_PORT_RANGE]) {
2809 const struct ifla_vxlan_port_range *p
2810 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
0dfbdf41
TG		 2811 conf.port_min = ntohs(p->low);
2812 conf.port_max = ntohs(p->high);
05f47d69 2813 }
2814
823aa873 2815 if (data[IFLA_VXLAN_PORT])
0dfbdf41 2816 conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
823aa873 2817
359a0ea9 2818 if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
0dfbdf41 2819 conf.flags |= VXLAN_F_UDP_CSUM;
359a0ea9
TH		 2820
2821 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
2822 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
0dfbdf41 2823 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
359a0ea9
TH		 2824
2825 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
2826 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
0dfbdf41 2827 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
359a0ea9 2828
dfd8645e
TH		 2829 if (data[IFLA_VXLAN_REMCSUM_TX] &&
2830 nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
0dfbdf41 2831 conf.flags |= VXLAN_F_REMCSUM_TX;
dfd8645e
TH		 2832
2833 if (data[IFLA_VXLAN_REMCSUM_RX] &&
2834 nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
0dfbdf41 2835 conf.flags |= VXLAN_F_REMCSUM_RX;
dfd8645e 2836
3511494c 2837 if (data[IFLA_VXLAN_GBP])
0dfbdf41 2838 conf.flags |= VXLAN_F_GBP;
3511494c 2839
0ace2ca8 2840 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
0dfbdf41 2841 conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
0ace2ca8 2842
0dfbdf41
TG		 2843 err = vxlan_dev_configure(src_net, dev, &conf);
2844 switch (err) {
2845 case -ENODEV:
2846 pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
2847 break;
1b13c97f 2848
0dfbdf41
TG		 2849 case -EPERM:
2850 pr_info("IPv6 is disabled via sysctl\n");
2851 break;
d342894c 2852
0dfbdf41
TG		 2853 case -EEXIST:
2854 pr_info("duplicate VNI %u\n", conf.vni);
2855 break;
afbd8bae
MR		 2856 }
2857
0dfbdf41 2858 return err;
d342894c 2859}
2860
2861static void vxlan_dellink(struct net_device *dev, struct list_head *head)
2862{
2863 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2864 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
d342894c 2865
fe5c3561 2866 spin_lock(&vn->sock_lock);
9c2e24e1
PS		 2867 if (!hlist_unhashed(&vxlan->hlist))
2868 hlist_del_rcu(&vxlan->hlist);
fe5c3561 2869 spin_unlock(&vn->sock_lock);
2870
58ce31cc 2871 gro_cells_destroy(&vxlan->gro_cells);
553675fb 2872 list_del(&vxlan->next);
d342894c 2873 unregister_netdevice_queue(dev, head);
2874}
2875
2876static size_t vxlan_get_size(const struct net_device *dev)
2877{
2878
2879 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
e4c7ed41 2880 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
d342894c 2881 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
e4c7ed41 2882 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
d342894c 2883 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
2884 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
2885 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
e4f67add
DS		 2886 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
2887 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
2888 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
2889 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
da8b43c0 2890 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
d342894c 2891 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
2892 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
05f47d69 2893 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
359a0ea9
TH		 2894 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
2895 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
2896 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
2897 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
dfd8645e
TH		 2898 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
2899 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
d342894c 2900 0;
2901}
2902
2903static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
2904{
2905 const struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 2906 const struct vxlan_rdst *dst = &vxlan->default_dst;
05f47d69 2907 struct ifla_vxlan_port_range ports = {
0dfbdf41
TG		 2908 .low = htons(vxlan->cfg.port_min),
2909 .high = htons(vxlan->cfg.port_max),
05f47d69 2910 };
d342894c 2911
c7995c43 2912 if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni))
d342894c 2913 goto nla_put_failure;
2914
e4c7ed41
CW		 2915 if (!vxlan_addr_any(&dst->remote_ip)) {
2916 if (dst->remote_ip.sa.sa_family == AF_INET) {
930345ea
JB		 2917 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
2918 dst->remote_ip.sin.sin_addr.s_addr))
e4c7ed41
CW		 2919 goto nla_put_failure;
2920#if IS_ENABLED(CONFIG_IPV6)
2921 } else {
930345ea
JB		 2922 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
2923 &dst->remote_ip.sin6.sin6_addr))
e4c7ed41
CW		 2924 goto nla_put_failure;
2925#endif
2926 }
2927 }
d342894c 2928
c7995c43 2929 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
d342894c 2930 goto nla_put_failure;
2931
0dfbdf41
TG		 2932 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
2933 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
930345ea 2934 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
0dfbdf41 2935 vxlan->cfg.saddr.sin.sin_addr.s_addr))
e4c7ed41
CW		 2936 goto nla_put_failure;
2937#if IS_ENABLED(CONFIG_IPV6)
2938 } else {
930345ea 2939 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
0dfbdf41 2940 &vxlan->cfg.saddr.sin6.sin6_addr))
e4c7ed41
CW		 2941 goto nla_put_failure;
2942#endif
2943 }
2944 }
d342894c 2945
0dfbdf41
TG		 2946 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
2947 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
e4f67add
DS		 2948 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
2949 !!(vxlan->flags & VXLAN_F_LEARN)) ||
2950 nla_put_u8(skb, IFLA_VXLAN_PROXY,
2951 !!(vxlan->flags & VXLAN_F_PROXY)) ||
2952 nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) ||
2953 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
2954 !!(vxlan->flags & VXLAN_F_L2MISS)) ||
2955 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
2956 !!(vxlan->flags & VXLAN_F_L3MISS)) ||
da8b43c0
AS		 2957 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
2958 !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) ||
0dfbdf41
TG		 2959 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
2960 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
2961 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
359a0ea9
TH		 2962 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
2963 !!(vxlan->flags & VXLAN_F_UDP_CSUM)) ||
2964 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
2965 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
2966 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
dfd8645e
TH		 2967 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
2968 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
2969 !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) ||
2970 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
2971 !!(vxlan->flags & VXLAN_F_REMCSUM_RX)))
d342894c 2972 goto nla_put_failure;
2973
05f47d69 2974 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
2975 goto nla_put_failure;
2976
3511494c
TG		 2977 if (vxlan->flags & VXLAN_F_GBP &&
2978 nla_put_flag(skb, IFLA_VXLAN_GBP))
2979 goto nla_put_failure;
2980
0ace2ca8
TH		 2981 if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL &&
2982 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
2983 goto nla_put_failure;
2984
d342894c 2985 return 0;
2986
2987nla_put_failure:
2988 return -EMSGSIZE;
2989}
2990
1728d4fa
ND		 2991static struct net *vxlan_get_link_net(const struct net_device *dev)
2992{
2993 struct vxlan_dev *vxlan = netdev_priv(dev);
2994
2995 return vxlan->net;
2996}
2997
d342894c 2998static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
2999 .kind = "vxlan",
3000 .maxtype = IFLA_VXLAN_MAX,
3001 .policy = vxlan_policy,
3002 .priv_size = sizeof(struct vxlan_dev),
3003 .setup = vxlan_setup,
3004 .validate = vxlan_validate,
3005 .newlink = vxlan_newlink,
3006 .dellink = vxlan_dellink,
3007 .get_size = vxlan_get_size,
3008 .fill_info = vxlan_fill_info,
1728d4fa 3009 .get_link_net = vxlan_get_link_net,
d342894c 3010};
3011
acaf4e70
DB		 3012static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3013 struct net_device *dev)
3014{
3015 struct vxlan_dev *vxlan, *next;
3016 LIST_HEAD(list_kill);
3017
3018 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3019 struct vxlan_rdst *dst = &vxlan->default_dst;
3020
3021 /* In case we created vxlan device with carrier
3022 * and we loose the carrier due to module unload
3023 * we also need to remove vxlan device. In other
3024 * cases, it's not necessary and remote_ifindex
3025 * is 0 here, so no matches.
3026 */
3027 if (dst->remote_ifindex == dev->ifindex)
3028 vxlan_dellink(vxlan->dev, &list_kill);
3029 }
3030
3031 unregister_netdevice_many(&list_kill);
3032}
3033
3034static int vxlan_lowerdev_event(struct notifier_block *unused,
3035 unsigned long event, void *ptr)
3036{
3037 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
783c1463 3038 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
acaf4e70 3039
783c1463 3040 if (event == NETDEV_UNREGISTER)
acaf4e70
DB		 3041 vxlan_handle_lowerdev_unregister(vn, dev);
3042
3043 return NOTIFY_DONE;
3044}
3045
3046static struct notifier_block vxlan_notifier_block __read_mostly = {
3047 .notifier_call = vxlan_lowerdev_event,
3048};
3049
d342894c 3050static __net_init int vxlan_init_net(struct net *net)
3051{
3052 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
31fec5aa 3053 unsigned int h;
d342894c 3054
553675fb 3055 INIT_LIST_HEAD(&vn->vxlan_list);
1c51a915 3056 spin_lock_init(&vn->sock_lock);
d342894c 3057
553675fb 3058 for (h = 0; h < PORT_HASH_SIZE; ++h)
3059 INIT_HLIST_HEAD(&vn->sock_list[h]);
d342894c 3060
3061 return 0;
3062}
3063
f01ec1c0
ND		 3064static void __net_exit vxlan_exit_net(struct net *net)
3065{
3066 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3067 struct vxlan_dev *vxlan, *next;
3068 struct net_device *dev, *aux;
3069 LIST_HEAD(list);
3070
3071 rtnl_lock();
3072 for_each_netdev_safe(net, dev, aux)
3073 if (dev->rtnl_link_ops == &vxlan_link_ops)
3074 unregister_netdevice_queue(dev, &list);
3075
3076 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3077 /* If vxlan->dev is in the same netns, it has already been added
3078 * to the list by the previous loop.
3079 */
58ce31cc
TH		 3080 if (!net_eq(dev_net(vxlan->dev), net)) {
3081 gro_cells_destroy(&vxlan->gro_cells);
13c3ed6a 3082 unregister_netdevice_queue(vxlan->dev, &list);
58ce31cc 3083 }
f01ec1c0
ND		 3084 }
3085
3086 unregister_netdevice_many(&list);
3087 rtnl_unlock();
3088}
3089
d342894c 3090static struct pernet_operations vxlan_net_ops = {
3091 .init = vxlan_init_net,
f01ec1c0 3092 .exit = vxlan_exit_net,
d342894c 3093 .id = &vxlan_net_id,
3094 .size = sizeof(struct vxlan_net),
3095};
3096
3097static int __init vxlan_init_module(void)
3098{
3099 int rc;
3100
758c57d1
SH		 3101 vxlan_wq = alloc_workqueue("vxlan", 0, 0);
3102 if (!vxlan_wq)
3103 return -ENOMEM;
3104
d342894c 3105 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3106
783c1463 3107 rc = register_pernet_subsys(&vxlan_net_ops);
d342894c 3108 if (rc)
3109 goto out1;
3110
acaf4e70 3111 rc = register_netdevice_notifier(&vxlan_notifier_block);
d342894c 3112 if (rc)
3113 goto out2;
3114
acaf4e70
DB		 3115 rc = rtnl_link_register(&vxlan_link_ops);
3116 if (rc)
3117 goto out3;
d342894c 3118
acaf4e70
DB		 3119 return 0;
3120out3:
3121 unregister_netdevice_notifier(&vxlan_notifier_block);
d342894c 3122out2:
783c1463 3123 unregister_pernet_subsys(&vxlan_net_ops);
d342894c 3124out1:
758c57d1 3125 destroy_workqueue(vxlan_wq);
d342894c 3126 return rc;
3127}
7332a13b 3128late_initcall(vxlan_init_module);
d342894c 3129
3130static void __exit vxlan_cleanup_module(void)
3131{
b7153984 3132 rtnl_link_unregister(&vxlan_link_ops);
acaf4e70 3133 unregister_netdevice_notifier(&vxlan_notifier_block);
758c57d1 3134 destroy_workqueue(vxlan_wq);
783c1463
DB		 3135 unregister_pernet_subsys(&vxlan_net_ops);
3136 /* rcu_barrier() is called by netns */
d342894c 3137}
3138module_exit(vxlan_cleanup_module);
3139
3140MODULE_LICENSE("GPL");
3141MODULE_VERSION(VXLAN_VERSION);
3b8df3c6 3142MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
ead5139a 3143MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
d342894c 3144MODULE_ALIAS_RTNL_LINK("vxlan");
Linux kernel - Deliverables
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