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openvswitch: Abstract vport name through ovs_vport_name()
[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
553675fb 78/* per-network namespace private data for this module */
79struct vxlan_net {
80 struct list_head vxlan_list;
81 struct hlist_head sock_list[PORT_HASH_SIZE];
1c51a915 82 spinlock_t sock_lock;
553675fb 83};
84
d342894c 85/* Forwarding table entry */
86struct vxlan_fdb {
87 struct hlist_node hlist; /* linked list of entries */
88 struct rcu_head rcu;
89 unsigned long updated; /* jiffies */
90 unsigned long used;
3e61aa8f 91 struct list_head remotes;
7177a3b0 92 u8 eth_addr[ETH_ALEN];
d342894c 93 u16 state; /* see ndm_state */
ae884082 94 u8 flags; /* see ndm_flags */
d342894c 95};
96
d342894c 97/* salt for hash table */
98static u32 vxlan_salt __read_mostly;
758c57d1 99static struct workqueue_struct *vxlan_wq;
d342894c 100
ee122c79
TG		 101static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
102{
e7030878
TG		 103 return vs->flags & VXLAN_F_COLLECT_METADATA ||
104 ip_tunnel_collect_metadata();
ee122c79
TG		 105}
106
e4c7ed41
CW		 107#if IS_ENABLED(CONFIG_IPV6)
108static inline
109bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
110{
f0ef3126
JB		 111 if (a->sa.sa_family != b->sa.sa_family)
112 return false;
113 if (a->sa.sa_family == AF_INET6)
114 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
115 else
116 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 117}
118
119static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
120{
f0ef3126
JB		 121 if (ipa->sa.sa_family == AF_INET6)
122 return ipv6_addr_any(&ipa->sin6.sin6_addr);
123 else
124 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 125}
126
127static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
128{
f0ef3126
JB		 129 if (ipa->sa.sa_family == AF_INET6)
130 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
131 else
132 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 133}
134
135static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
136{
f0ef3126 137 if (nla_len(nla) >= sizeof(struct in6_addr)) {
67b61f6c 138 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
f0ef3126
JB		 139 ip->sa.sa_family = AF_INET6;
140 return 0;
141 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 142 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 143 ip->sa.sa_family = AF_INET;
144 return 0;
145 } else {
146 return -EAFNOSUPPORT;
147 }
e4c7ed41
CW		 148}
149
150static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 151 const union vxlan_addr *ip)
e4c7ed41 152{
f0ef3126 153 if (ip->sa.sa_family == AF_INET6)
930345ea 154 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
f0ef3126 155 else
930345ea 156 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 157}
158
159#else /* !CONFIG_IPV6 */
160
161static inline
162bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
163{
f0ef3126 164 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 165}
166
167static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
168{
f0ef3126 169 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 170}
171
172static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
173{
f0ef3126 174 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 175}
176
177static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
178{
f0ef3126
JB		 179 if (nla_len(nla) >= sizeof(struct in6_addr)) {
180 return -EAFNOSUPPORT;
181 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 182 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 183 ip->sa.sa_family = AF_INET;
184 return 0;
185 } else {
186 return -EAFNOSUPPORT;
187 }
e4c7ed41
CW		 188}
189
190static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 191 const union vxlan_addr *ip)
e4c7ed41 192{
930345ea 193 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 194}
195#endif
196
553675fb 197/* Virtual Network hash table head */
198static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id)
199{
200 return &vs->vni_list[hash_32(id, VNI_HASH_BITS)];
201}
202
203/* Socket hash table head */
204static inline struct hlist_head *vs_head(struct net *net, __be16 port)
d342894c 205{
206 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
207
553675fb 208 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
209}
210
3e61aa8f
SH		 211/* First remote destination for a forwarding entry.
212 * Guaranteed to be non-NULL because remotes are never deleted.
213 */
5ca5461c 214static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
3e61aa8f 215{
5ca5461c 216 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
217}
218
219static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
220{
221 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
3e61aa8f
SH		 222}
223
ac5132d1
TG		 224/* Find VXLAN socket based on network namespace, address family and UDP port
225 * and enabled unshareable flags.
226 */
227static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
228 __be16 port, u32 flags)
553675fb 229{
230 struct vxlan_sock *vs;
af33c1ad
TH		 231
232 flags &= VXLAN_F_RCV_FLAGS;
553675fb 233
234 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
19ca9fc1 235 if (inet_sk(vs->sock->sk)->inet_sport == port &&
ac5132d1 236 inet_sk(vs->sock->sk)->sk.sk_family == family &&
af33c1ad 237 vs->flags == flags)
553675fb 238 return vs;
239 }
240 return NULL;
d342894c 241}
242
5cfccc5a 243static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id)
d342894c 244{
245 struct vxlan_dev *vxlan;
d342894c 246
553675fb 247 hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) {
c7995c43 248 if (vxlan->default_dst.remote_vni == id)
d342894c 249 return vxlan;
250 }
251
252 return NULL;
253}
254
5cfccc5a 255/* Look up VNI in a per net namespace table */
19ca9fc1 256static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id,
ac5132d1
TG		 257 sa_family_t family, __be16 port,
258 u32 flags)
5cfccc5a
PS		 259{
260 struct vxlan_sock *vs;
261
ac5132d1 262 vs = vxlan_find_sock(net, family, port, flags);
5cfccc5a
PS		 263 if (!vs)
264 return NULL;
265
266 return vxlan_vs_find_vni(vs, id);
267}
268
d342894c 269/* Fill in neighbour message in skbuff. */
270static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
234f5b73
SH		 271 const struct vxlan_fdb *fdb,
272 u32 portid, u32 seq, int type, unsigned int flags,
273 const struct vxlan_rdst *rdst)
d342894c 274{
275 unsigned long now = jiffies;
276 struct nda_cacheinfo ci;
277 struct nlmsghdr *nlh;
278 struct ndmsg *ndm;
e4f67add 279 bool send_ip, send_eth;
d342894c 280
281 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
282 if (nlh == NULL)
283 return -EMSGSIZE;
284
285 ndm = nlmsg_data(nlh);
286 memset(ndm, 0, sizeof(*ndm));
e4f67add
DS		 287
288 send_eth = send_ip = true;
289
290 if (type == RTM_GETNEIGH) {
291 ndm->ndm_family = AF_INET;
e4c7ed41 292 send_ip = !vxlan_addr_any(&rdst->remote_ip);
e4f67add
DS		 293 send_eth = !is_zero_ether_addr(fdb->eth_addr);
294 } else
295 ndm->ndm_family = AF_BRIDGE;
d342894c 296 ndm->ndm_state = fdb->state;
297 ndm->ndm_ifindex = vxlan->dev->ifindex;
ae884082 298 ndm->ndm_flags = fdb->flags;
545469f7 299 ndm->ndm_type = RTN_UNICAST;
d342894c 300
193523bf 301 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
4967082b 302 nla_put_s32(skb, NDA_LINK_NETNSID,
7a0877d4 303 peernet2id_alloc(dev_net(vxlan->dev), vxlan->net)))
193523bf
ND		 304 goto nla_put_failure;
305
e4f67add 306 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
d342894c 307 goto nla_put_failure;
308
e4c7ed41 309 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
6681712d
DS		 310 goto nla_put_failure;
311
0dfbdf41 312 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
6681712d
DS		 313 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
314 goto nla_put_failure;
c7995c43 315 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
60d9d4c6 316 nla_put_u32(skb, NDA_VNI, rdst->remote_vni))
6681712d
DS		 317 goto nla_put_failure;
318 if (rdst->remote_ifindex &&
319 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
d342894c 320 goto nla_put_failure;
321
322 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
323 ci.ndm_confirmed = 0;
324 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
325 ci.ndm_refcnt = 0;
326
327 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
328 goto nla_put_failure;
329
053c095a
JB		 330 nlmsg_end(skb, nlh);
331 return 0;
d342894c 332
333nla_put_failure:
334 nlmsg_cancel(skb, nlh);
335 return -EMSGSIZE;
336}
337
338static inline size_t vxlan_nlmsg_size(void)
339{
340 return NLMSG_ALIGN(sizeof(struct ndmsg))
341 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
e4c7ed41 342 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
73cf3317 343 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
6681712d
DS		 344 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
345 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
4967082b 346 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
d342894c 347 + nla_total_size(sizeof(struct nda_cacheinfo));
348}
349
9e4b93f9
ND		 350static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
351 struct vxlan_rdst *rd, int type)
d342894c 352{
353 struct net *net = dev_net(vxlan->dev);
354 struct sk_buff *skb;
355 int err = -ENOBUFS;
356
357 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
358 if (skb == NULL)
359 goto errout;
360
9e4b93f9 361 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
d342894c 362 if (err < 0) {
363 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
364 WARN_ON(err == -EMSGSIZE);
365 kfree_skb(skb);
366 goto errout;
367 }
368
369 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
370 return;
371errout:
372 if (err < 0)
373 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
374}
375
e4c7ed41 376static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
e4f67add
DS		 377{
378 struct vxlan_dev *vxlan = netdev_priv(dev);
bb3fd687
SH		 379 struct vxlan_fdb f = {
380 .state = NUD_STALE,
381 };
382 struct vxlan_rdst remote = {
e4c7ed41 383 .remote_ip = *ipa, /* goes to NDA_DST */
bb3fd687
SH		 384 .remote_vni = VXLAN_N_VID,
385 };
3e61aa8f 386
9e4b93f9 387 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 388}
389
390static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
391{
bb3fd687
SH		 392 struct vxlan_fdb f = {
393 .state = NUD_STALE,
394 };
9e4b93f9 395 struct vxlan_rdst remote = { };
e4f67add 396
e4f67add
DS		 397 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
398
9e4b93f9 399 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 400}
401
d342894c 402/* Hash Ethernet address */
403static u32 eth_hash(const unsigned char *addr)
404{
405 u64 value = get_unaligned((u64 *)addr);
406
407 /* only want 6 bytes */
408#ifdef __BIG_ENDIAN
d342894c 409 value >>= 16;
321fb991 410#else
411 value <<= 16;
d342894c 412#endif
413 return hash_64(value, FDB_HASH_BITS);
414}
415
416/* Hash chain to use given mac address */
417static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
418 const u8 *mac)
419{
420 return &vxlan->fdb_head[eth_hash(mac)];
421}
422
423/* Look up Ethernet address in forwarding table */
014be2c8 424static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
d342894c 425 const u8 *mac)
d342894c 426{
427 struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
428 struct vxlan_fdb *f;
d342894c 429
b67bfe0d 430 hlist_for_each_entry_rcu(f, head, hlist) {
7367d0b5 431 if (ether_addr_equal(mac, f->eth_addr))
d342894c 432 return f;
433 }
434
435 return NULL;
436}
437
014be2c8
SS		 438static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
439 const u8 *mac)
440{
441 struct vxlan_fdb *f;
442
443 f = __vxlan_find_mac(vxlan, mac);
444 if (f)
445 f->used = jiffies;
446
447 return f;
448}
449
a5e7c10a
MR		 450/* caller should hold vxlan->hash_lock */
451static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
e4c7ed41 452 union vxlan_addr *ip, __be16 port,
a5e7c10a 453 __u32 vni, __u32 ifindex)
6681712d 454{
3e61aa8f 455 struct vxlan_rdst *rd;
6681712d 456
3e61aa8f 457 list_for_each_entry(rd, &f->remotes, list) {
e4c7ed41 458 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
6681712d
DS		 459 rd->remote_port == port &&
460 rd->remote_vni == vni &&
461 rd->remote_ifindex == ifindex)
a5e7c10a 462 return rd;
6681712d 463 }
3e61aa8f 464
a5e7c10a
MR		 465 return NULL;
466}
467
906dc186
TR		 468/* Replace destination of unicast mac */
469static int vxlan_fdb_replace(struct vxlan_fdb *f,
e4c7ed41 470 union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex)
906dc186
TR		 471{
472 struct vxlan_rdst *rd;
473
474 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
475 if (rd)
476 return 0;
477
478 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
479 if (!rd)
480 return 0;
e4c7ed41 481 rd->remote_ip = *ip;
906dc186
TR		 482 rd->remote_port = port;
483 rd->remote_vni = vni;
484 rd->remote_ifindex = ifindex;
485 return 1;
486}
487
a5e7c10a
MR		 488/* Add/update destinations for multicast */
489static int vxlan_fdb_append(struct vxlan_fdb *f,
9e4b93f9
ND		 490 union vxlan_addr *ip, __be16 port, __u32 vni,
491 __u32 ifindex, struct vxlan_rdst **rdp)
a5e7c10a
MR		 492{
493 struct vxlan_rdst *rd;
494
495 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
496 if (rd)
497 return 0;
498
6681712d
DS		 499 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
500 if (rd == NULL)
501 return -ENOBUFS;
e4c7ed41 502 rd->remote_ip = *ip;
6681712d
DS		 503 rd->remote_port = port;
504 rd->remote_vni = vni;
505 rd->remote_ifindex = ifindex;
3e61aa8f
SH		 506
507 list_add_tail_rcu(&rd->list, &f->remotes);
508
9e4b93f9 509 *rdp = rd;
6681712d
DS		 510 return 1;
511}
512
dfd8645e
TH		 513static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
514 unsigned int off,
515 struct vxlanhdr *vh, size_t hdrlen,
0ace2ca8
TH		 516 u32 data, struct gro_remcsum *grc,
517 bool nopartial)
dfd8645e
TH		 518{
519 size_t start, offset, plen;
dfd8645e
TH		 520
521 if (skb->remcsum_offload)
26c4f7da 522 return NULL;
dfd8645e
TH		 523
524 if (!NAPI_GRO_CB(skb)->csum_valid)
525 return NULL;
526
527 start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
528 offset = start + ((data & VXLAN_RCO_UDP) ?
529 offsetof(struct udphdr, check) :
530 offsetof(struct tcphdr, check));
531
532 plen = hdrlen + offset + sizeof(u16);
533
534 /* Pull checksum that will be written */
535 if (skb_gro_header_hard(skb, off + plen)) {
536 vh = skb_gro_header_slow(skb, off + plen, off);
537 if (!vh)
538 return NULL;
539 }
540
26c4f7da 541 skb_gro_remcsum_process(skb, (void *)vh + hdrlen,
0ace2ca8 542 start, offset, grc, nopartial);
dfd8645e
TH		 543
544 skb->remcsum_offload = 1;
545
546 return vh;
547}
548
a2b12f3c
TH		 549static struct sk_buff **vxlan_gro_receive(struct sk_buff **head,
550 struct sk_buff *skb,
551 struct udp_offload *uoff)
dc01e7d3
OG		 552{
553 struct sk_buff *p, **pp = NULL;
554 struct vxlanhdr *vh, *vh2;
9b174d88 555 unsigned int hlen, off_vx;
dc01e7d3 556 int flush = 1;
dfd8645e
TH		 557 struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock,
558 udp_offloads);
559 u32 flags;
26c4f7da
TH		 560 struct gro_remcsum grc;
561
562 skb_gro_remcsum_init(&grc);
dc01e7d3
OG		 563
564 off_vx = skb_gro_offset(skb);
565 hlen = off_vx + sizeof(*vh);
566 vh = skb_gro_header_fast(skb, off_vx);
567 if (skb_gro_header_hard(skb, hlen)) {
568 vh = skb_gro_header_slow(skb, hlen, off_vx);
569 if (unlikely(!vh))
570 goto out;
571 }
dc01e7d3 572
dfd8645e
TH		 573 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
574 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
575
576 flags = ntohl(vh->vx_flags);
577
578 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
579 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
0ace2ca8
TH		 580 ntohl(vh->vx_vni), &grc,
581 !!(vs->flags &
582 VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 583
584 if (!vh)
585 goto out;
586 }
587
dc01e7d3
OG		 588 flush = 0;
589
590 for (p = *head; p; p = p->next) {
591 if (!NAPI_GRO_CB(p)->same_flow)
592 continue;
593
594 vh2 = (struct vxlanhdr *)(p->data + off_vx);
3511494c
TG		 595 if (vh->vx_flags != vh2->vx_flags ||
596 vh->vx_vni != vh2->vx_vni) {
dc01e7d3
OG		 597 NAPI_GRO_CB(p)->same_flow = 0;
598 continue;
599 }
dc01e7d3
OG		 600 }
601
9b174d88 602 pp = eth_gro_receive(head, skb);
dc01e7d3 603
dc01e7d3 604out:
26c4f7da 605 skb_gro_remcsum_cleanup(skb, &grc);
dc01e7d3
OG		 606 NAPI_GRO_CB(skb)->flush |= flush;
607
608 return pp;
609}
610
a2b12f3c
TH		 611static int vxlan_gro_complete(struct sk_buff *skb, int nhoff,
612 struct udp_offload *uoff)
dc01e7d3 613{
cfdf1e1b
JG		 614 udp_tunnel_gro_complete(skb, nhoff);
615
9b174d88 616 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
dc01e7d3
OG		 617}
618
53cf5275 619/* Notify netdevs that UDP port started listening */
dc01e7d3 620static void vxlan_notify_add_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 621{
622 struct net_device *dev;
dc01e7d3 623 struct sock *sk = vs->sock->sk;
53cf5275
JG		 624 struct net *net = sock_net(sk);
625 sa_family_t sa_family = sk->sk_family;
35e42379 626 __be16 port = inet_sk(sk)->inet_sport;
dc01e7d3
OG		 627 int err;
628
629 if (sa_family == AF_INET) {
630 err = udp_add_offload(&vs->udp_offloads);
631 if (err)
632 pr_warn("vxlan: udp_add_offload failed with status %d\n", err);
633 }
53cf5275
JG		 634
635 rcu_read_lock();
636 for_each_netdev_rcu(net, dev) {
637 if (dev->netdev_ops->ndo_add_vxlan_port)
638 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
639 port);
640 }
641 rcu_read_unlock();
642}
643
644/* Notify netdevs that UDP port is no more listening */
dc01e7d3 645static void vxlan_notify_del_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 646{
647 struct net_device *dev;
dc01e7d3 648 struct sock *sk = vs->sock->sk;
53cf5275
JG		 649 struct net *net = sock_net(sk);
650 sa_family_t sa_family = sk->sk_family;
35e42379 651 __be16 port = inet_sk(sk)->inet_sport;
53cf5275
JG		 652
653 rcu_read_lock();
654 for_each_netdev_rcu(net, dev) {
655 if (dev->netdev_ops->ndo_del_vxlan_port)
656 dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family,
657 port);
658 }
659 rcu_read_unlock();
dc01e7d3
OG		 660
661 if (sa_family == AF_INET)
662 udp_del_offload(&vs->udp_offloads);
53cf5275
JG		 663}
664
d342894c 665/* Add new entry to forwarding table -- assumes lock held */
666static int vxlan_fdb_create(struct vxlan_dev *vxlan,
e4c7ed41 667 const u8 *mac, union vxlan_addr *ip,
6681712d 668 __u16 state, __u16 flags,
73cf3317 669 __be16 port, __u32 vni, __u32 ifindex,
ae884082 670 __u8 ndm_flags)
d342894c 671{
9e4b93f9 672 struct vxlan_rdst *rd = NULL;
d342894c 673 struct vxlan_fdb *f;
674 int notify = 0;
675
014be2c8 676 f = __vxlan_find_mac(vxlan, mac);
d342894c 677 if (f) {
678 if (flags & NLM_F_EXCL) {
679 netdev_dbg(vxlan->dev,
680 "lost race to create %pM\n", mac);
681 return -EEXIST;
682 }
683 if (f->state != state) {
684 f->state = state;
685 f->updated = jiffies;
686 notify = 1;
687 }
ae884082
DS		 688 if (f->flags != ndm_flags) {
689 f->flags = ndm_flags;
690 f->updated = jiffies;
691 notify = 1;
692 }
906dc186
TR		 693 if ((flags & NLM_F_REPLACE)) {
694 /* Only change unicasts */
695 if (!(is_multicast_ether_addr(f->eth_addr) ||
696 is_zero_ether_addr(f->eth_addr))) {
60840429 697 notify |= vxlan_fdb_replace(f, ip, port, vni,
906dc186 698 ifindex);
906dc186
TR		 699 } else
700 return -EOPNOTSUPP;
701 }
6681712d 702 if ((flags & NLM_F_APPEND) &&
58e4c767
MR		 703 (is_multicast_ether_addr(f->eth_addr) ||
704 is_zero_ether_addr(f->eth_addr))) {
9e4b93f9
ND		 705 int rc = vxlan_fdb_append(f, ip, port, vni, ifindex,
706 &rd);
6681712d
DS		 707
708 if (rc < 0)
709 return rc;
710 notify |= rc;
711 }
d342894c 712 } else {
713 if (!(flags & NLM_F_CREATE))
714 return -ENOENT;
715
0dfbdf41
TG		 716 if (vxlan->cfg.addrmax &&
717 vxlan->addrcnt >= vxlan->cfg.addrmax)
d342894c 718 return -ENOSPC;
719
906dc186
TR		 720 /* Disallow replace to add a multicast entry */
721 if ((flags & NLM_F_REPLACE) &&
722 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
723 return -EOPNOTSUPP;
724
e4c7ed41 725 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
d342894c 726 f = kmalloc(sizeof(*f), GFP_ATOMIC);
727 if (!f)
728 return -ENOMEM;
729
730 notify = 1;
d342894c 731 f->state = state;
ae884082 732 f->flags = ndm_flags;
d342894c 733 f->updated = f->used = jiffies;
3e61aa8f 734 INIT_LIST_HEAD(&f->remotes);
d342894c 735 memcpy(f->eth_addr, mac, ETH_ALEN);
736
9e4b93f9 737 vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
3e61aa8f 738
d342894c 739 ++vxlan->addrcnt;
740 hlist_add_head_rcu(&f->hlist,
741 vxlan_fdb_head(vxlan, mac));
742 }
743
9e4b93f9
ND		 744 if (notify) {
745 if (rd == NULL)
746 rd = first_remote_rtnl(f);
747 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
748 }
d342894c 749
750 return 0;
751}
752
6706c82e 753static void vxlan_fdb_free(struct rcu_head *head)
6681712d
DS		 754{
755 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
3e61aa8f 756 struct vxlan_rdst *rd, *nd;
6681712d 757
3e61aa8f 758 list_for_each_entry_safe(rd, nd, &f->remotes, list)
6681712d 759 kfree(rd);
6681712d
DS		 760 kfree(f);
761}
762
d342894c 763static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
764{
765 netdev_dbg(vxlan->dev,
766 "delete %pM\n", f->eth_addr);
767
768 --vxlan->addrcnt;
9e4b93f9 769 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
d342894c 770
771 hlist_del_rcu(&f->hlist);
6681712d 772 call_rcu(&f->rcu, vxlan_fdb_free);
d342894c 773}
774
f0b074be 775static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
e4c7ed41 776 union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex)
d342894c 777{
6681712d 778 struct net *net = dev_net(vxlan->dev);
e4c7ed41 779 int err;
d342894c 780
f0b074be 781 if (tb[NDA_DST]) {
e4c7ed41
CW		 782 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
783 if (err)
784 return err;
f0b074be 785 } else {
e4c7ed41
CW		 786 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
787 if (remote->sa.sa_family == AF_INET) {
788 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
789 ip->sa.sa_family = AF_INET;
790#if IS_ENABLED(CONFIG_IPV6)
791 } else {
792 ip->sin6.sin6_addr = in6addr_any;
793 ip->sa.sa_family = AF_INET6;
794#endif
795 }
f0b074be 796 }
d342894c 797
6681712d 798 if (tb[NDA_PORT]) {
73cf3317 799 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
6681712d 800 return -EINVAL;
f0b074be
MR		 801 *port = nla_get_be16(tb[NDA_PORT]);
802 } else {
0dfbdf41 803 *port = vxlan->cfg.dst_port;
f0b074be 804 }
6681712d
DS		 805
806 if (tb[NDA_VNI]) {
807 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
808 return -EINVAL;
f0b074be
MR		 809 *vni = nla_get_u32(tb[NDA_VNI]);
810 } else {
811 *vni = vxlan->default_dst.remote_vni;
812 }
6681712d
DS		 813
814 if (tb[NDA_IFINDEX]) {
5abb0029 815 struct net_device *tdev;
6681712d
DS		 816
817 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
818 return -EINVAL;
f0b074be 819 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
73763949 820 tdev = __dev_get_by_index(net, *ifindex);
5abb0029 821 if (!tdev)
6681712d 822 return -EADDRNOTAVAIL;
f0b074be
MR		 823 } else {
824 *ifindex = 0;
825 }
826
827 return 0;
828}
829
830/* Add static entry (via netlink) */
831static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
832 struct net_device *dev,
f6f6424b 833 const unsigned char *addr, u16 vid, u16 flags)
f0b074be
MR		 834{
835 struct vxlan_dev *vxlan = netdev_priv(dev);
836 /* struct net *net = dev_net(vxlan->dev); */
e4c7ed41 837 union vxlan_addr ip;
f0b074be
MR		 838 __be16 port;
839 u32 vni, ifindex;
840 int err;
841
842 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
843 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
844 ndm->ndm_state);
845 return -EINVAL;
846 }
847
848 if (tb[NDA_DST] == NULL)
849 return -EINVAL;
850
851 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
852 if (err)
853 return err;
6681712d 854
5933a7bb
MR		 855 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
856 return -EAFNOSUPPORT;
857
d342894c 858 spin_lock_bh(&vxlan->hash_lock);
e4c7ed41 859 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
73cf3317 860 port, vni, ifindex, ndm->ndm_flags);
d342894c 861 spin_unlock_bh(&vxlan->hash_lock);
862
863 return err;
864}
865
866/* Delete entry (via netlink) */
1690be63
VY		 867static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
868 struct net_device *dev,
f6f6424b 869 const unsigned char *addr, u16 vid)
d342894c 870{
871 struct vxlan_dev *vxlan = netdev_priv(dev);
872 struct vxlan_fdb *f;
bc7892ba 873 struct vxlan_rdst *rd = NULL;
e4c7ed41 874 union vxlan_addr ip;
bc7892ba
MR		 875 __be16 port;
876 u32 vni, ifindex;
877 int err;
878
879 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
880 if (err)
881 return err;
882
883 err = -ENOENT;
d342894c 884
885 spin_lock_bh(&vxlan->hash_lock);
886 f = vxlan_find_mac(vxlan, addr);
bc7892ba
MR		 887 if (!f)
888 goto out;
889
e4c7ed41
CW		 890 if (!vxlan_addr_any(&ip)) {
891 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
bc7892ba
MR		 892 if (!rd)
893 goto out;
894 }
895
896 err = 0;
897
898 /* remove a destination if it's not the only one on the list,
899 * otherwise destroy the fdb entry
900 */
901 if (rd && !list_is_singular(&f->remotes)) {
902 list_del_rcu(&rd->list);
9e4b93f9 903 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
dcdc7a59 904 kfree_rcu(rd, rcu);
bc7892ba 905 goto out;
d342894c 906 }
bc7892ba
MR		 907
908 vxlan_fdb_destroy(vxlan, f);
909
910out:
d342894c 911 spin_unlock_bh(&vxlan->hash_lock);
912
913 return err;
914}
915
916/* Dump forwarding table */
917static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3
JHS		 918 struct net_device *dev,
919 struct net_device *filter_dev, int idx)
d342894c 920{
921 struct vxlan_dev *vxlan = netdev_priv(dev);
922 unsigned int h;
923
924 for (h = 0; h < FDB_HASH_SIZE; ++h) {
925 struct vxlan_fdb *f;
d342894c 926 int err;
927
b67bfe0d 928 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
6681712d 929 struct vxlan_rdst *rd;
6681712d 930
3e61aa8f
SH		 931 if (idx < cb->args[0])
932 goto skip;
933
934 list_for_each_entry_rcu(rd, &f->remotes, list) {
6681712d
DS		 935 err = vxlan_fdb_info(skb, vxlan, f,
936 NETLINK_CB(cb->skb).portid,
937 cb->nlh->nlmsg_seq,
938 RTM_NEWNEIGH,
939 NLM_F_MULTI, rd);
940 if (err < 0)
3e61aa8f 941 goto out;
6681712d 942 }
3e61aa8f
SH		 943skip:
944 ++idx;
d342894c 945 }
946 }
3e61aa8f 947out:
d342894c 948 return idx;
949}
950
951/* Watch incoming packets to learn mapping between Ethernet address
952 * and Tunnel endpoint.
c4b49512 953 * Return true if packet is bogus and should be dropped.
d342894c 954 */
26a41ae6 955static bool vxlan_snoop(struct net_device *dev,
e4c7ed41 956 union vxlan_addr *src_ip, const u8 *src_mac)
d342894c 957{
958 struct vxlan_dev *vxlan = netdev_priv(dev);
959 struct vxlan_fdb *f;
d342894c 960
961 f = vxlan_find_mac(vxlan, src_mac);
962 if (likely(f)) {
5ca5461c 963 struct vxlan_rdst *rdst = first_remote_rcu(f);
3e61aa8f 964
e4c7ed41 965 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip)))
26a41ae6 966 return false;
967
968 /* Don't migrate static entries, drop packets */
eb064c3b 969 if (f->state & NUD_NOARP)
26a41ae6 970 return true;
d342894c 971
972 if (net_ratelimit())
973 netdev_info(dev,
e4c7ed41 974 "%pM migrated from %pIS to %pIS\n",
a4870f79 975 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
d342894c 976
e4c7ed41 977 rdst->remote_ip = *src_ip;
d342894c 978 f->updated = jiffies;
9e4b93f9 979 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
d342894c 980 } else {
981 /* learned new entry */
982 spin_lock(&vxlan->hash_lock);
3bf74b1a 983
984 /* close off race between vxlan_flush and incoming packets */
985 if (netif_running(dev))
986 vxlan_fdb_create(vxlan, src_mac, src_ip,
987 NUD_REACHABLE,
988 NLM_F_EXCL|NLM_F_CREATE,
0dfbdf41 989 vxlan->cfg.dst_port,
3bf74b1a 990 vxlan->default_dst.remote_vni,
991 0, NTF_SELF);
d342894c 992 spin_unlock(&vxlan->hash_lock);
993 }
26a41ae6 994
995 return false;
d342894c 996}
997
d342894c 998/* See if multicast group is already in use by other ID */
95ab0991 999static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
d342894c 1000{
553675fb 1001 struct vxlan_dev *vxlan;
d342894c 1002
95ab0991
G		 1003 /* The vxlan_sock is only used by dev, leaving group has
1004 * no effect on other vxlan devices.
1005 */
1006 if (atomic_read(&dev->vn_sock->refcnt) == 1)
1007 return false;
1008
553675fb 1009 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
95ab0991 1010 if (!netif_running(vxlan->dev) || vxlan == dev)
553675fb 1011 continue;
d342894c 1012
95ab0991
G		 1013 if (vxlan->vn_sock != dev->vn_sock)
1014 continue;
1015
1016 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1017 &dev->default_dst.remote_ip))
1018 continue;
1019
1020 if (vxlan->default_dst.remote_ifindex !=
1021 dev->default_dst.remote_ifindex)
1022 continue;
1023
1024 return true;
553675fb 1025 }
d342894c 1026
1027 return false;
1028}
1029
012a5729 1030void vxlan_sock_release(struct vxlan_sock *vs)
7c47cedf 1031{
53cf5275
JG		 1032 struct sock *sk = vs->sock->sk;
1033 struct net *net = sock_net(sk);
1034 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
012a5729 1035
7c47cedf
SH		 1036 if (!atomic_dec_and_test(&vs->refcnt))
1037 return;
d342894c 1038
1c51a915 1039 spin_lock(&vn->sock_lock);
7c47cedf 1040 hlist_del_rcu(&vs->hlist);
dc01e7d3 1041 vxlan_notify_del_rx_port(vs);
1c51a915
SH		 1042 spin_unlock(&vn->sock_lock);
1043
7c47cedf 1044 queue_work(vxlan_wq, &vs->del_work);
d342894c 1045}
012a5729 1046EXPORT_SYMBOL_GPL(vxlan_sock_release);
d342894c 1047
56ef9c90 1048/* Update multicast group membership when first VNI on
c4b49512 1049 * multicast address is brought up
7c47cedf 1050 */
56ef9c90 1051static int vxlan_igmp_join(struct vxlan_dev *vxlan)
d342894c 1052{
7c47cedf
SH		 1053 struct vxlan_sock *vs = vxlan->vn_sock;
1054 struct sock *sk = vs->sock->sk;
e4c7ed41
CW		 1055 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1056 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1057 int ret = -EINVAL;
d342894c 1058
d342894c 1059 lock_sock(sk);
e4c7ed41
CW		 1060 if (ip->sa.sa_family == AF_INET) {
1061 struct ip_mreqn mreq = {
1062 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1063 .imr_ifindex = ifindex,
1064 };
1065
56ef9c90 1066 ret = ip_mc_join_group(sk, &mreq);
e4c7ed41
CW		 1067#if IS_ENABLED(CONFIG_IPV6)
1068 } else {
56ef9c90
MRL		 1069 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1070 &ip->sin6.sin6_addr);
e4c7ed41
CW		 1071#endif
1072 }
3fc2de2f 1073 release_sock(sk);
1074
56ef9c90 1075 return ret;
3fc2de2f 1076}
1077
1078/* Inverse of vxlan_igmp_join when last VNI is brought down */
56ef9c90 1079static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
3fc2de2f 1080{
3fc2de2f 1081 struct vxlan_sock *vs = vxlan->vn_sock;
1082 struct sock *sk = vs->sock->sk;
e4c7ed41
CW		 1083 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1084 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1085 int ret = -EINVAL;
3fc2de2f 1086
1087 lock_sock(sk);
e4c7ed41
CW		 1088 if (ip->sa.sa_family == AF_INET) {
1089 struct ip_mreqn mreq = {
1090 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1091 .imr_ifindex = ifindex,
1092 };
1093
56ef9c90 1094 ret = ip_mc_leave_group(sk, &mreq);
e4c7ed41
CW		 1095#if IS_ENABLED(CONFIG_IPV6)
1096 } else {
56ef9c90
MRL		 1097 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1098 &ip->sin6.sin6_addr);
e4c7ed41
CW		 1099#endif
1100 }
d342894c 1101 release_sock(sk);
d342894c 1102
56ef9c90 1103 return ret;
d342894c 1104}
1105
dfd8645e 1106static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh,
0ace2ca8 1107 size_t hdrlen, u32 data, bool nopartial)
dfd8645e
TH		 1108{
1109 size_t start, offset, plen;
dfd8645e 1110
dfd8645e
TH		 1111 start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
1112 offset = start + ((data & VXLAN_RCO_UDP) ?
1113 offsetof(struct udphdr, check) :
1114 offsetof(struct tcphdr, check));
1115
1116 plen = hdrlen + offset + sizeof(u16);
1117
1118 if (!pskb_may_pull(skb, plen))
1119 return NULL;
1120
1121 vh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
1122
0ace2ca8
TH		 1123 skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset,
1124 nopartial);
dfd8645e
TH		 1125
1126 return vh;
1127}
1128
d342894c 1129/* Callback from net/ipv4/udp.c to receive packets */
1130static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
1131{
ee122c79
TG		 1132 struct metadata_dst *tun_dst = NULL;
1133 struct ip_tunnel_info *info;
5cfccc5a 1134 struct vxlan_sock *vs;
d342894c 1135 struct vxlanhdr *vxh;
3bf39475 1136 u32 flags, vni;
ee122c79
TG		 1137 struct vxlan_metadata _md;
1138 struct vxlan_metadata *md = &_md;
d342894c 1139
d342894c 1140 /* Need Vxlan and inner Ethernet header to be present */
7ce04758 1141 if (!pskb_may_pull(skb, VXLAN_HLEN))
d342894c 1142 goto error;
1143
7ce04758 1144 vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
3bf39475
TH		 1145 flags = ntohl(vxh->vx_flags);
1146 vni = ntohl(vxh->vx_vni);
1147
1148 if (flags & VXLAN_HF_VNI) {
1149 flags &= ~VXLAN_HF_VNI;
1150 } else {
1151 /* VNI flag always required to be set */
1152 goto bad_flags;
d342894c 1153 }
1154
5cfccc5a
PS		 1155 if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB)))
1156 goto drop;
dfd8645e 1157 vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
5cfccc5a 1158
559835ea 1159 vs = rcu_dereference_sk_user_data(sk);
5cfccc5a 1160 if (!vs)
d342894c 1161 goto drop;
d342894c 1162
dfd8645e 1163 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
0ace2ca8
TH		 1164 vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni,
1165 !!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 1166 if (!vxh)
1167 goto drop;
1168
1169 flags &= ~VXLAN_HF_RCO;
40fb70f3 1170 vni &= VXLAN_VNI_MASK;
dfd8645e
TH		 1171 }
1172
ee122c79
TG		 1173 if (vxlan_collect_metadata(vs)) {
1174 const struct iphdr *iph = ip_hdr(skb);
1175
1176 tun_dst = metadata_dst_alloc(sizeof(*md), GFP_ATOMIC);
1177 if (!tun_dst)
1178 goto drop;
1179
1180 info = &tun_dst->u.tun_info;
1181 info->key.ipv4_src = iph->saddr;
1182 info->key.ipv4_dst = iph->daddr;
1183 info->key.ipv4_tos = iph->tos;
1184 info->key.ipv4_ttl = iph->ttl;
1185 info->key.tp_src = udp_hdr(skb)->source;
1186 info->key.tp_dst = udp_hdr(skb)->dest;
1187
1188 info->mode = IP_TUNNEL_INFO_RX;
1189 info->key.tun_flags = TUNNEL_KEY;
1190 info->key.tun_id = cpu_to_be64(vni >> 8);
1191 if (udp_hdr(skb)->check != 0)
1192 info->key.tun_flags |= TUNNEL_CSUM;
1193
1194 md = ip_tunnel_info_opts(info, sizeof(*md));
1195 md->tun_dst = tun_dst;
1196 } else {
1197 memset(md, 0, sizeof(*md));
1198 }
1199
3511494c
TG		 1200 /* For backwards compatibility, only allow reserved fields to be
1201 * used by VXLAN extensions if explicitly requested.
1202 */
1203 if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) {
1204 struct vxlanhdr_gbp *gbp;
1205
1206 gbp = (struct vxlanhdr_gbp *)vxh;
ee122c79
TG		 1207 md->gbp = ntohs(gbp->policy_id);
1208
1209 if (tun_dst)
1210 info->key.tun_flags |= TUNNEL_VXLAN_OPT;
3511494c
TG		 1211
1212 if (gbp->dont_learn)
ee122c79 1213 md->gbp |= VXLAN_GBP_DONT_LEARN;
3511494c
TG		 1214
1215 if (gbp->policy_applied)
ee122c79 1216 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
3511494c
TG		 1217
1218 flags &= ~VXLAN_GBP_USED_BITS;
1219 }
1220
40fb70f3 1221 if (flags || vni & ~VXLAN_VNI_MASK) {
3bf39475
TH		 1222 /* If there are any unprocessed flags remaining treat
1223 * this as a malformed packet. This behavior diverges from
1224 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1225 * in reserved fields are to be ignored. The approach here
c4b49512 1226 * maintains compatibility with previous stack code, and also
3bf39475
TH		 1227 * is more robust and provides a little more security in
1228 * adding extensions to VXLAN.
1229 */
1230
1231 goto bad_flags;
1232 }
1233
ee122c79
TG		 1234 md->vni = vxh->vx_vni;
1235 vs->rcv(vs, skb, md);
5cfccc5a
PS		 1236 return 0;
1237
1238drop:
1239 /* Consume bad packet */
1240 kfree_skb(skb);
1241 return 0;
1242
3bf39475
TH		 1243bad_flags:
1244 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1245 ntohl(vxh->vx_flags), ntohl(vxh->vx_vni));
1246
5cfccc5a 1247error:
ee122c79
TG		 1248 if (tun_dst)
1249 dst_release((struct dst_entry *)tun_dst);
1250
5cfccc5a
PS		 1251 /* Return non vxlan pkt */
1252 return 1;
1253}
1254
3511494c
TG		 1255static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb,
1256 struct vxlan_metadata *md)
5cfccc5a 1257{
e4c7ed41
CW		 1258 struct iphdr *oip = NULL;
1259 struct ipv6hdr *oip6 = NULL;
5cfccc5a 1260 struct vxlan_dev *vxlan;
8f84985f 1261 struct pcpu_sw_netstats *stats;
e4c7ed41 1262 union vxlan_addr saddr;
5cfccc5a 1263 __u32 vni;
e4c7ed41
CW		 1264 int err = 0;
1265 union vxlan_addr *remote_ip;
5cfccc5a 1266
ee122c79
TG		 1267 /* For flow based devices, map all packets to VNI 0 */
1268 if (vs->flags & VXLAN_F_FLOW_BASED)
1269 vni = 0;
1270 else
1271 vni = ntohl(md->vni) >> 8;
1272
5cfccc5a
PS		 1273 /* Is this VNI defined? */
1274 vxlan = vxlan_vs_find_vni(vs, vni);
1275 if (!vxlan)
d342894c 1276 goto drop;
d342894c 1277
e4c7ed41 1278 remote_ip = &vxlan->default_dst.remote_ip;
e4f67add 1279 skb_reset_mac_header(skb);
f01ec1c0 1280 skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev)));
d342894c 1281 skb->protocol = eth_type_trans(skb, vxlan->dev);
f79b064c 1282 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
d342894c 1283
1284 /* Ignore packet loops (and multicast echo) */
7367d0b5 1285 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
d342894c 1286 goto drop;
1287
7ce04758 1288 /* Re-examine inner Ethernet packet */
e4c7ed41
CW		 1289 if (remote_ip->sa.sa_family == AF_INET) {
1290 oip = ip_hdr(skb);
1291 saddr.sin.sin_addr.s_addr = oip->saddr;
1292 saddr.sa.sa_family = AF_INET;
1293#if IS_ENABLED(CONFIG_IPV6)
1294 } else {
1295 oip6 = ipv6_hdr(skb);
1296 saddr.sin6.sin6_addr = oip6->saddr;
1297 saddr.sa.sa_family = AF_INET6;
1298#endif
1299 }
1300
ee122c79
TG		 1301 if (md->tun_dst) {
1302 skb_dst_set(skb, (struct dst_entry *)md->tun_dst);
1303 md->tun_dst = NULL;
1304 }
1305
26a41ae6 1306 if ((vxlan->flags & VXLAN_F_LEARN) &&
e4c7ed41 1307 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source))
26a41ae6 1308 goto drop;
d342894c 1309
d342894c 1310 skb_reset_network_header(skb);
ee122c79
TG		 1311 /* In flow-based mode, GBP is carried in dst_metadata */
1312 if (!(vs->flags & VXLAN_F_FLOW_BASED))
1313 skb->mark = md->gbp;
0afb1666 1314
e4c7ed41
CW		 1315 if (oip6)
1316 err = IP6_ECN_decapsulate(oip6, skb);
1317 if (oip)
1318 err = IP_ECN_decapsulate(oip, skb);
1319
d342894c 1320 if (unlikely(err)) {
e4c7ed41
CW		 1321 if (log_ecn_error) {
1322 if (oip6)
1323 net_info_ratelimited("non-ECT from %pI6\n",
1324 &oip6->saddr);
1325 if (oip)
1326 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1327 &oip->saddr, oip->tos);
1328 }
d342894c 1329 if (err > 1) {
1330 ++vxlan->dev->stats.rx_frame_errors;
1331 ++vxlan->dev->stats.rx_errors;
1332 goto drop;
1333 }
1334 }
1335
e8171045 1336 stats = this_cpu_ptr(vxlan->dev->tstats);
d342894c 1337 u64_stats_update_begin(&stats->syncp);
1338 stats->rx_packets++;
1339 stats->rx_bytes += skb->len;
1340 u64_stats_update_end(&stats->syncp);
1341
1342 netif_rx(skb);
1343
5cfccc5a 1344 return;
d342894c 1345drop:
ee122c79
TG		 1346 if (md->tun_dst)
1347 dst_release((struct dst_entry *)md->tun_dst);
1348
d342894c 1349 /* Consume bad packet */
1350 kfree_skb(skb);
d342894c 1351}
1352
e4f67add
DS		 1353static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
1354{
1355 struct vxlan_dev *vxlan = netdev_priv(dev);
1356 struct arphdr *parp;
1357 u8 *arpptr, *sha;
1358 __be32 sip, tip;
1359 struct neighbour *n;
1360
1361 if (dev->flags & IFF_NOARP)
1362 goto out;
1363
1364 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1365 dev->stats.tx_dropped++;
1366 goto out;
1367 }
1368 parp = arp_hdr(skb);
1369
1370 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1371 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1372 parp->ar_pro != htons(ETH_P_IP) ||
1373 parp->ar_op != htons(ARPOP_REQUEST) ||
1374 parp->ar_hln != dev->addr_len ||
1375 parp->ar_pln != 4)
1376 goto out;
1377 arpptr = (u8 *)parp + sizeof(struct arphdr);
1378 sha = arpptr;
1379 arpptr += dev->addr_len; /* sha */
1380 memcpy(&sip, arpptr, sizeof(sip));
1381 arpptr += sizeof(sip);
1382 arpptr += dev->addr_len; /* tha */
1383 memcpy(&tip, arpptr, sizeof(tip));
1384
1385 if (ipv4_is_loopback(tip) ||
1386 ipv4_is_multicast(tip))
1387 goto out;
1388
1389 n = neigh_lookup(&arp_tbl, &tip, dev);
1390
1391 if (n) {
e4f67add
DS		 1392 struct vxlan_fdb *f;
1393 struct sk_buff *reply;
1394
1395 if (!(n->nud_state & NUD_CONNECTED)) {
1396 neigh_release(n);
1397 goto out;
1398 }
1399
1400 f = vxlan_find_mac(vxlan, n->ha);
e4c7ed41 1401 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
e4f67add
DS		 1402 /* bridge-local neighbor */
1403 neigh_release(n);
1404 goto out;
1405 }
1406
1407 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1408 n->ha, sha);
1409
1410 neigh_release(n);
1411
7346135d
DS		 1412 if (reply == NULL)
1413 goto out;
1414
e4f67add
DS		 1415 skb_reset_mac_header(reply);
1416 __skb_pull(reply, skb_network_offset(reply));
1417 reply->ip_summed = CHECKSUM_UNNECESSARY;
1418 reply->pkt_type = PACKET_HOST;
1419
1420 if (netif_rx_ni(reply) == NET_RX_DROP)
1421 dev->stats.rx_dropped++;
e4c7ed41
CW		 1422 } else if (vxlan->flags & VXLAN_F_L3MISS) {
1423 union vxlan_addr ipa = {
1424 .sin.sin_addr.s_addr = tip,
a45e92a5 1425 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1426 };
1427
1428 vxlan_ip_miss(dev, &ipa);
1429 }
e4f67add
DS		 1430out:
1431 consume_skb(skb);
1432 return NETDEV_TX_OK;
1433}
1434
f564f45c 1435#if IS_ENABLED(CONFIG_IPV6)
4b29dba9
DS		 1436static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1437 struct neighbour *n, bool isrouter)
1438{
1439 struct net_device *dev = request->dev;
1440 struct sk_buff *reply;
1441 struct nd_msg *ns, *na;
1442 struct ipv6hdr *pip6;
1443 u8 *daddr;
1444 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1445 int ns_olen;
1446 int i, len;
1447
1448 if (dev == NULL)
1449 return NULL;
1450
1451 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1452 sizeof(*na) + na_olen + dev->needed_tailroom;
1453 reply = alloc_skb(len, GFP_ATOMIC);
1454 if (reply == NULL)
1455 return NULL;
1456
1457 reply->protocol = htons(ETH_P_IPV6);
1458 reply->dev = dev;
1459 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1460 skb_push(reply, sizeof(struct ethhdr));
1461 skb_set_mac_header(reply, 0);
1462
1463 ns = (struct nd_msg *)skb_transport_header(request);
1464
1465 daddr = eth_hdr(request)->h_source;
1466 ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns);
1467 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1468 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1469 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1470 break;
1471 }
1472 }
1473
1474 /* Ethernet header */
1475 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1476 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1477 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1478 reply->protocol = htons(ETH_P_IPV6);
1479
1480 skb_pull(reply, sizeof(struct ethhdr));
1481 skb_set_network_header(reply, 0);
1482 skb_put(reply, sizeof(struct ipv6hdr));
1483
1484 /* IPv6 header */
1485
1486 pip6 = ipv6_hdr(reply);
1487 memset(pip6, 0, sizeof(struct ipv6hdr));
1488 pip6->version = 6;
1489 pip6->priority = ipv6_hdr(request)->priority;
1490 pip6->nexthdr = IPPROTO_ICMPV6;
1491 pip6->hop_limit = 255;
1492 pip6->daddr = ipv6_hdr(request)->saddr;
1493 pip6->saddr = *(struct in6_addr *)n->primary_key;
1494
1495 skb_pull(reply, sizeof(struct ipv6hdr));
1496 skb_set_transport_header(reply, 0);
1497
1498 na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen);
1499
1500 /* Neighbor Advertisement */
1501 memset(na, 0, sizeof(*na)+na_olen);
1502 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1503 na->icmph.icmp6_router = isrouter;
1504 na->icmph.icmp6_override = 1;
1505 na->icmph.icmp6_solicited = 1;
1506 na->target = ns->target;
1507 ether_addr_copy(&na->opt[2], n->ha);
1508 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1509 na->opt[1] = na_olen >> 3;
1510
1511 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1512 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1513 csum_partial(na, sizeof(*na)+na_olen, 0));
1514
1515 pip6->payload_len = htons(sizeof(*na)+na_olen);
1516
1517 skb_push(reply, sizeof(struct ipv6hdr));
1518
1519 reply->ip_summed = CHECKSUM_UNNECESSARY;
1520
1521 return reply;
1522}
1523
f564f45c
CW		 1524static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
1525{
1526 struct vxlan_dev *vxlan = netdev_priv(dev);
4b29dba9 1527 struct nd_msg *msg;
f564f45c
CW		 1528 const struct ipv6hdr *iphdr;
1529 const struct in6_addr *saddr, *daddr;
4b29dba9
DS		 1530 struct neighbour *n;
1531 struct inet6_dev *in6_dev;
f564f45c
CW		 1532
1533 in6_dev = __in6_dev_get(dev);
1534 if (!in6_dev)
1535 goto out;
1536
f564f45c
CW		 1537 iphdr = ipv6_hdr(skb);
1538 saddr = &iphdr->saddr;
1539 daddr = &iphdr->daddr;
1540
f564f45c
CW		 1541 msg = (struct nd_msg *)skb_transport_header(skb);
1542 if (msg->icmph.icmp6_code != 0 ||
1543 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1544 goto out;
1545
4b29dba9
DS		 1546 if (ipv6_addr_loopback(daddr) ||
1547 ipv6_addr_is_multicast(&msg->target))
1548 goto out;
1549
1550 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
f564f45c
CW		 1551
1552 if (n) {
1553 struct vxlan_fdb *f;
4b29dba9 1554 struct sk_buff *reply;
f564f45c
CW		 1555
1556 if (!(n->nud_state & NUD_CONNECTED)) {
1557 neigh_release(n);
1558 goto out;
1559 }
1560
1561 f = vxlan_find_mac(vxlan, n->ha);
1562 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1563 /* bridge-local neighbor */
1564 neigh_release(n);
1565 goto out;
1566 }
1567
4b29dba9
DS		 1568 reply = vxlan_na_create(skb, n,
1569 !!(f ? f->flags & NTF_ROUTER : 0));
1570
f564f45c 1571 neigh_release(n);
4b29dba9
DS		 1572
1573 if (reply == NULL)
1574 goto out;
1575
1576 if (netif_rx_ni(reply) == NET_RX_DROP)
1577 dev->stats.rx_dropped++;
1578
f564f45c 1579 } else if (vxlan->flags & VXLAN_F_L3MISS) {
4b29dba9
DS		 1580 union vxlan_addr ipa = {
1581 .sin6.sin6_addr = msg->target,
a45e92a5 1582 .sin6.sin6_family = AF_INET6,
4b29dba9
DS		 1583 };
1584
f564f45c
CW		 1585 vxlan_ip_miss(dev, &ipa);
1586 }
1587
1588out:
1589 consume_skb(skb);
1590 return NETDEV_TX_OK;
1591}
1592#endif
1593
e4f67add
DS		 1594static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1595{
1596 struct vxlan_dev *vxlan = netdev_priv(dev);
1597 struct neighbour *n;
e4f67add
DS		 1598
1599 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1600 return false;
1601
1602 n = NULL;
1603 switch (ntohs(eth_hdr(skb)->h_proto)) {
1604 case ETH_P_IP:
e15a00aa
CW		 1605 {
1606 struct iphdr *pip;
1607
e4f67add
DS		 1608 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1609 return false;
1610 pip = ip_hdr(skb);
1611 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
e4c7ed41
CW		 1612 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1613 union vxlan_addr ipa = {
1614 .sin.sin_addr.s_addr = pip->daddr,
a45e92a5 1615 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1616 };
1617
1618 vxlan_ip_miss(dev, &ipa);
1619 return false;
1620 }
1621
e4f67add 1622 break;
e15a00aa
CW		 1623 }
1624#if IS_ENABLED(CONFIG_IPV6)
1625 case ETH_P_IPV6:
1626 {
1627 struct ipv6hdr *pip6;
1628
1629 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1630 return false;
1631 pip6 = ipv6_hdr(skb);
1632 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
1633 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1634 union vxlan_addr ipa = {
1635 .sin6.sin6_addr = pip6->daddr,
a45e92a5 1636 .sin6.sin6_family = AF_INET6,
e15a00aa
CW		 1637 };
1638
1639 vxlan_ip_miss(dev, &ipa);
1640 return false;
1641 }
1642
1643 break;
1644 }
1645#endif
e4f67add
DS		 1646 default:
1647 return false;
1648 }
1649
1650 if (n) {
1651 bool diff;
1652
7367d0b5 1653 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
e4f67add
DS		 1654 if (diff) {
1655 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1656 dev->addr_len);
1657 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1658 }
1659 neigh_release(n);
1660 return diff;
e4c7ed41
CW		 1661 }
1662
e4f67add
DS		 1663 return false;
1664}
1665
af33c1ad 1666static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
3511494c
TG		 1667 struct vxlan_metadata *md)
1668{
1669 struct vxlanhdr_gbp *gbp;
1670
db79a621
TG		 1671 if (!md->gbp)
1672 return;
1673
3511494c
TG		 1674 gbp = (struct vxlanhdr_gbp *)vxh;
1675 vxh->vx_flags |= htonl(VXLAN_HF_GBP);
1676
1677 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1678 gbp->dont_learn = 1;
1679
1680 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1681 gbp->policy_applied = 1;
1682
1683 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1684}
1685
e4c7ed41 1686#if IS_ENABLED(CONFIG_IPV6)
79b16aad
DM		 1687static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk,
1688 struct sk_buff *skb,
e4c7ed41
CW		 1689 struct net_device *dev, struct in6_addr *saddr,
1690 struct in6_addr *daddr, __u8 prio, __u8 ttl,
3511494c 1691 __be16 src_port, __be16 dst_port,
af33c1ad 1692 struct vxlan_metadata *md, bool xnet, u32 vxflags)
e4c7ed41 1693{
e4c7ed41 1694 struct vxlanhdr *vxh;
e4c7ed41
CW		 1695 int min_headroom;
1696 int err;
af33c1ad 1697 bool udp_sum = !(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX);
dfd8645e
TH		 1698 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
1699 u16 hdrlen = sizeof(struct vxlanhdr);
1700
af33c1ad 1701 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1702 skb->ip_summed == CHECKSUM_PARTIAL) {
1703 int csum_start = skb_checksum_start_offset(skb);
1704
1705 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1706 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1707 (skb->csum_offset == offsetof(struct udphdr, check) ||
1708 skb->csum_offset == offsetof(struct tcphdr, check))) {
1709 udp_sum = false;
1710 type |= SKB_GSO_TUNNEL_REMCSUM;
1711 }
1712 }
e4c7ed41 1713
f01ec1c0 1714 skb_scrub_packet(skb, xnet);
963a88b3 1715
e4c7ed41
CW		 1716 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
1717 + VXLAN_HLEN + sizeof(struct ipv6hdr)
df8a39de 1718 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
e4c7ed41
CW		 1719
1720 /* Need space for new headers (invalidates iph ptr) */
1721 err = skb_cow_head(skb, min_headroom);
74f47278
PS		 1722 if (unlikely(err)) {
1723 kfree_skb(skb);
1724 goto err;
1725 }
e4c7ed41 1726
5968250c 1727 skb = vlan_hwaccel_push_inside(skb);
74f47278
PS		 1728 if (WARN_ON(!skb)) {
1729 err = -ENOMEM;
1730 goto err;
1731 }
e4c7ed41 1732
b736a623
JG		 1733 skb = iptunnel_handle_offloads(skb, udp_sum, type);
1734 if (IS_ERR(skb)) {
1735 err = -EINVAL;
1736 goto err;
1737 }
1738
e4c7ed41 1739 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
3bf39475 1740 vxh->vx_flags = htonl(VXLAN_HF_VNI);
3511494c 1741 vxh->vx_vni = md->vni;
e4c7ed41 1742
dfd8645e
TH		 1743 if (type & SKB_GSO_TUNNEL_REMCSUM) {
1744 u32 data = (skb_checksum_start_offset(skb) - hdrlen) >>
1745 VXLAN_RCO_SHIFT;
1746
1747 if (skb->csum_offset == offsetof(struct udphdr, check))
1748 data |= VXLAN_RCO_UDP;
1749
1750 vxh->vx_vni |= htonl(data);
1751 vxh->vx_flags |= htonl(VXLAN_HF_RCO);
1752
1753 if (!skb_is_gso(skb)) {
1754 skb->ip_summed = CHECKSUM_NONE;
1755 skb->encapsulation = 0;
1756 }
1757 }
1758
af33c1ad
TH		 1759 if (vxflags & VXLAN_F_GBP)
1760 vxlan_build_gbp_hdr(vxh, vxflags, md);
3511494c 1761
996c9fd1
TH		 1762 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1763
79b16aad 1764 udp_tunnel6_xmit_skb(dst, sk, skb, dev, saddr, daddr, prio,
d998f8ef 1765 ttl, src_port, dst_port,
af33c1ad 1766 !!(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX));
e4c7ed41 1767 return 0;
74f47278
PS		 1768err:
1769 dst_release(dst);
1770 return err;
e4c7ed41
CW		 1771}
1772#endif
1773
79b16aad 1774int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
49560532 1775 __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
3511494c 1776 __be16 src_port, __be16 dst_port,
af33c1ad 1777 struct vxlan_metadata *md, bool xnet, u32 vxflags)
49560532
PS		 1778{
1779 struct vxlanhdr *vxh;
649c5b8b 1780 int min_headroom;
49560532 1781 int err;
af33c1ad 1782 bool udp_sum = !!(vxflags & VXLAN_F_UDP_CSUM);
dfd8645e
TH		 1783 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
1784 u16 hdrlen = sizeof(struct vxlanhdr);
1785
af33c1ad 1786 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1787 skb->ip_summed == CHECKSUM_PARTIAL) {
1788 int csum_start = skb_checksum_start_offset(skb);
1789
1790 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1791 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1792 (skb->csum_offset == offsetof(struct udphdr, check) ||
1793 skb->csum_offset == offsetof(struct tcphdr, check))) {
1794 udp_sum = false;
1795 type |= SKB_GSO_TUNNEL_REMCSUM;
1796 }
1797 }
49560532 1798
649c5b8b 1799 min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
1eaa8178 1800 + VXLAN_HLEN + sizeof(struct iphdr)
df8a39de 1801 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
649c5b8b
PS		 1802
1803 /* Need space for new headers (invalidates iph ptr) */
1804 err = skb_cow_head(skb, min_headroom);
74f47278
PS		 1805 if (unlikely(err)) {
1806 kfree_skb(skb);
649c5b8b 1807 return err;
74f47278 1808 }
649c5b8b 1809
5968250c
JP		 1810 skb = vlan_hwaccel_push_inside(skb);
1811 if (WARN_ON(!skb))
1812 return -ENOMEM;
1eaa8178 1813
b736a623
JG		 1814 skb = iptunnel_handle_offloads(skb, udp_sum, type);
1815 if (IS_ERR(skb))
1816 return PTR_ERR(skb);
1817
49560532 1818 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
3bf39475 1819 vxh->vx_flags = htonl(VXLAN_HF_VNI);
3511494c 1820 vxh->vx_vni = md->vni;
49560532 1821
dfd8645e
TH		 1822 if (type & SKB_GSO_TUNNEL_REMCSUM) {
1823 u32 data = (skb_checksum_start_offset(skb) - hdrlen) >>
1824 VXLAN_RCO_SHIFT;
1825
1826 if (skb->csum_offset == offsetof(struct udphdr, check))
1827 data |= VXLAN_RCO_UDP;
1828
1829 vxh->vx_vni |= htonl(data);
1830 vxh->vx_flags |= htonl(VXLAN_HF_RCO);
1831
1832 if (!skb_is_gso(skb)) {
1833 skb->ip_summed = CHECKSUM_NONE;
1834 skb->encapsulation = 0;
1835 }
1836 }
1837
af33c1ad
TH		 1838 if (vxflags & VXLAN_F_GBP)
1839 vxlan_build_gbp_hdr(vxh, vxflags, md);
3511494c 1840
996c9fd1
TH		 1841 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1842
79b16aad 1843 return udp_tunnel_xmit_skb(rt, sk, skb, src, dst, tos,
d998f8ef 1844 ttl, df, src_port, dst_port, xnet,
af33c1ad 1845 !(vxflags & VXLAN_F_UDP_CSUM));
49560532
PS		 1846}
1847EXPORT_SYMBOL_GPL(vxlan_xmit_skb);
1848
9dcc71e1
SS		 1849/* Bypass encapsulation if the destination is local */
1850static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
1851 struct vxlan_dev *dst_vxlan)
1852{
8f84985f 1853 struct pcpu_sw_netstats *tx_stats, *rx_stats;
e4c7ed41
CW		 1854 union vxlan_addr loopback;
1855 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
ce6502a8
LR		 1856 struct net_device *dev = skb->dev;
1857 int len = skb->len;
9dcc71e1 1858
8f84985f
LR		 1859 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
1860 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
9dcc71e1
SS		 1861 skb->pkt_type = PACKET_HOST;
1862 skb->encapsulation = 0;
1863 skb->dev = dst_vxlan->dev;
1864 __skb_pull(skb, skb_network_offset(skb));
1865
e4c7ed41
CW		 1866 if (remote_ip->sa.sa_family == AF_INET) {
1867 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1868 loopback.sa.sa_family = AF_INET;
1869#if IS_ENABLED(CONFIG_IPV6)
1870 } else {
1871 loopback.sin6.sin6_addr = in6addr_loopback;
1872 loopback.sa.sa_family = AF_INET6;
1873#endif
1874 }
1875
9dcc71e1 1876 if (dst_vxlan->flags & VXLAN_F_LEARN)
e4c7ed41 1877 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
9dcc71e1
SS		 1878
1879 u64_stats_update_begin(&tx_stats->syncp);
1880 tx_stats->tx_packets++;
ce6502a8 1881 tx_stats->tx_bytes += len;
9dcc71e1
SS		 1882 u64_stats_update_end(&tx_stats->syncp);
1883
1884 if (netif_rx(skb) == NET_RX_SUCCESS) {
1885 u64_stats_update_begin(&rx_stats->syncp);
1886 rx_stats->rx_packets++;
ce6502a8 1887 rx_stats->rx_bytes += len;
9dcc71e1
SS		 1888 u64_stats_update_end(&rx_stats->syncp);
1889 } else {
ce6502a8 1890 dev->stats.rx_dropped++;
9dcc71e1
SS		 1891 }
1892}
1893
4ad16930
SH		 1894static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
1895 struct vxlan_rdst *rdst, bool did_rsc)
d342894c 1896{
3093fbe7 1897 struct ip_tunnel_info *info;
d342894c 1898 struct vxlan_dev *vxlan = netdev_priv(dev);
79b16aad 1899 struct sock *sk = vxlan->vn_sock->sock->sk;
e4c7ed41 1900 struct rtable *rt = NULL;
d342894c 1901 const struct iphdr *old_iph;
d342894c 1902 struct flowi4 fl4;
e4c7ed41 1903 union vxlan_addr *dst;
ee122c79
TG		 1904 union vxlan_addr remote_ip;
1905 struct vxlan_metadata _md;
1906 struct vxlan_metadata *md = &_md;
e4c7ed41 1907 __be16 src_port = 0, dst_port;
234f5b73 1908 u32 vni;
d342894c 1909 __be16 df = 0;
1910 __u8 tos, ttl;
0e6fbc5b 1911 int err;
ee122c79 1912 u32 flags = vxlan->flags;
d342894c 1913
3093fbe7
TG		 1914 /* FIXME: Support IPv6 */
1915 info = skb_tunnel_info(skb, AF_INET);
1916
ee122c79 1917 if (rdst) {
0dfbdf41 1918 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
ee122c79
TG		 1919 vni = rdst->remote_vni;
1920 dst = &rdst->remote_ip;
1921 } else {
1922 if (!info) {
1923 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1924 dev->name);
1925 goto drop;
1926 }
1927
0dfbdf41 1928 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
ee122c79
TG		 1929 vni = be64_to_cpu(info->key.tun_id);
1930 remote_ip.sin.sin_family = AF_INET;
1931 remote_ip.sin.sin_addr.s_addr = info->key.ipv4_dst;
1932 dst = &remote_ip;
1933 }
e4f67add 1934
e4c7ed41 1935 if (vxlan_addr_any(dst)) {
e4f67add 1936 if (did_rsc) {
e4f67add 1937 /* short-circuited back to local bridge */
9dcc71e1 1938 vxlan_encap_bypass(skb, vxlan, vxlan);
4ad16930 1939 return;
e4f67add 1940 }
ef59febe 1941 goto drop;
e4f67add 1942 }
ef59febe 1943
d342894c 1944 old_iph = ip_hdr(skb);
1945
0dfbdf41 1946 ttl = vxlan->cfg.ttl;
e4c7ed41 1947 if (!ttl && vxlan_addr_multicast(dst))
d342894c 1948 ttl = 1;
1949
0dfbdf41 1950 tos = vxlan->cfg.tos;
d342894c 1951 if (tos == 1)
206aaafc 1952 tos = ip_tunnel_get_dsfield(old_iph, skb);
d342894c 1953
0dfbdf41
TG		 1954 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
1955 vxlan->cfg.port_max, true);
d342894c 1956
e4c7ed41 1957 if (dst->sa.sa_family == AF_INET) {
ee122c79
TG		 1958 if (info) {
1959 if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)
1960 df = htons(IP_DF);
1961 if (info->key.tun_flags & TUNNEL_CSUM)
1962 flags |= VXLAN_F_UDP_CSUM;
1963 else
1964 flags &= ~VXLAN_F_UDP_CSUM;
1965
1966 ttl = info->key.ipv4_ttl;
1967 tos = info->key.ipv4_tos;
1968
1969 if (info->options_len)
1970 md = ip_tunnel_info_opts(info, sizeof(*md));
1971 } else {
1972 md->gbp = skb->mark;
1973 }
1974
e4c7ed41 1975 memset(&fl4, 0, sizeof(fl4));
ee122c79 1976 fl4.flowi4_oif = rdst ? rdst->remote_ifindex : 0;
e4c7ed41 1977 fl4.flowi4_tos = RT_TOS(tos);
239fb791
TG		 1978 fl4.flowi4_mark = skb->mark;
1979 fl4.flowi4_proto = IPPROTO_UDP;
e4c7ed41 1980 fl4.daddr = dst->sin.sin_addr.s_addr;
0dfbdf41 1981 fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr;
e4c7ed41 1982
f01ec1c0 1983 rt = ip_route_output_key(vxlan->net, &fl4);
e4c7ed41
CW		 1984 if (IS_ERR(rt)) {
1985 netdev_dbg(dev, "no route to %pI4\n",
1986 &dst->sin.sin_addr.s_addr);
1987 dev->stats.tx_carrier_errors++;
1988 goto tx_error;
1989 }
d342894c 1990
e4c7ed41
CW		 1991 if (rt->dst.dev == dev) {
1992 netdev_dbg(dev, "circular route to %pI4\n",
1993 &dst->sin.sin_addr.s_addr);
1994 dev->stats.collisions++;
fffc15a5 1995 goto rt_tx_error;
e4c7ed41
CW		 1996 }
1997
1998 /* Bypass encapsulation if the destination is local */
1999 if (rt->rt_flags & RTCF_LOCAL &&
2000 !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
2001 struct vxlan_dev *dst_vxlan;
2002
2003 ip_rt_put(rt);
19ca9fc1 2004 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 2005 dst->sa.sa_family, dst_port,
2006 vxlan->flags);
e4c7ed41
CW		 2007 if (!dst_vxlan)
2008 goto tx_error;
2009 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2010 return;
2011 }
2012
2013 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2014 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
ee122c79 2015 md->vni = htonl(vni << 8);
79b16aad 2016 err = vxlan_xmit_skb(rt, sk, skb, fl4.saddr,
af33c1ad 2017 dst->sin.sin_addr.s_addr, tos, ttl, df,
ee122c79 2018 src_port, dst_port, md,
af33c1ad 2019 !net_eq(vxlan->net, dev_net(vxlan->dev)),
ee122c79 2020 flags);
74f47278
PS		 2021 if (err < 0) {
2022 /* skb is already freed. */
2023 skb = NULL;
e4c7ed41 2024 goto rt_tx_error;
74f47278
PS		 2025 }
2026
e4c7ed41
CW		 2027 iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
2028#if IS_ENABLED(CONFIG_IPV6)
2029 } else {
e4c7ed41
CW		 2030 struct dst_entry *ndst;
2031 struct flowi6 fl6;
2032 u32 flags;
2033
2034 memset(&fl6, 0, sizeof(fl6));
ee122c79 2035 fl6.flowi6_oif = rdst ? rdst->remote_ifindex : 0;
e4c7ed41 2036 fl6.daddr = dst->sin6.sin6_addr;
0dfbdf41 2037 fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr;
239fb791 2038 fl6.flowi6_mark = skb->mark;
8c1bb79f 2039 fl6.flowi6_proto = IPPROTO_UDP;
e4c7ed41
CW		 2040
2041 if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) {
2042 netdev_dbg(dev, "no route to %pI6\n",
2043 &dst->sin6.sin6_addr);
2044 dev->stats.tx_carrier_errors++;
9dcc71e1 2045 goto tx_error;
e4c7ed41 2046 }
d342894c 2047
e4c7ed41
CW		 2048 if (ndst->dev == dev) {
2049 netdev_dbg(dev, "circular route to %pI6\n",
2050 &dst->sin6.sin6_addr);
2051 dst_release(ndst);
2052 dev->stats.collisions++;
2053 goto tx_error;
2054 }
0e6fbc5b 2055
e4c7ed41
CW		 2056 /* Bypass encapsulation if the destination is local */
2057 flags = ((struct rt6_info *)ndst)->rt6i_flags;
2058 if (flags & RTF_LOCAL &&
2059 !(flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
2060 struct vxlan_dev *dst_vxlan;
2061
2062 dst_release(ndst);
19ca9fc1 2063 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 2064 dst->sa.sa_family, dst_port,
2065 vxlan->flags);
e4c7ed41
CW		 2066 if (!dst_vxlan)
2067 goto tx_error;
2068 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2069 return;
2070 }
49560532 2071
e4c7ed41 2072 ttl = ttl ? : ip6_dst_hoplimit(ndst);
ee122c79
TG		 2073 md->vni = htonl(vni << 8);
2074 md->gbp = skb->mark;
e4c7ed41 2075
79b16aad 2076 err = vxlan6_xmit_skb(ndst, sk, skb, dev, &fl6.saddr, &fl6.daddr,
ee122c79 2077 0, ttl, src_port, dst_port, md,
af33c1ad
TH		 2078 !net_eq(vxlan->net, dev_net(vxlan->dev)),
2079 vxlan->flags);
e4c7ed41
CW		 2080#endif
2081 }
0e6fbc5b 2082
4ad16930 2083 return;
d342894c 2084
2085drop:
2086 dev->stats.tx_dropped++;
2087 goto tx_free;
2088
49560532
PS		 2089rt_tx_error:
2090 ip_rt_put(rt);
d342894c 2091tx_error:
2092 dev->stats.tx_errors++;
2093tx_free:
2094 dev_kfree_skb(skb);
d342894c 2095}
2096
6681712d
DS		 2097/* Transmit local packets over Vxlan
2098 *
2099 * Outer IP header inherits ECN and DF from inner header.
2100 * Outer UDP destination is the VXLAN assigned port.
2101 * source port is based on hash of flow
2102 */
2103static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2104{
2105 struct vxlan_dev *vxlan = netdev_priv(dev);
3093fbe7 2106 const struct ip_tunnel_info *info;
6681712d
DS		 2107 struct ethhdr *eth;
2108 bool did_rsc = false;
8f646c92 2109 struct vxlan_rdst *rdst, *fdst = NULL;
6681712d 2110 struct vxlan_fdb *f;
6681712d 2111
3093fbe7
TG		 2112 /* FIXME: Support IPv6 */
2113 info = skb_tunnel_info(skb, AF_INET);
2114
6681712d
DS		 2115 skb_reset_mac_header(skb);
2116 eth = eth_hdr(skb);
2117
f564f45c
CW		 2118 if ((vxlan->flags & VXLAN_F_PROXY)) {
2119 if (ntohs(eth->h_proto) == ETH_P_ARP)
2120 return arp_reduce(dev, skb);
2121#if IS_ENABLED(CONFIG_IPV6)
2122 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
91269e39
LR		 2123 pskb_may_pull(skb, sizeof(struct ipv6hdr)
2124 + sizeof(struct nd_msg)) &&
f564f45c
CW		 2125 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2126 struct nd_msg *msg;
2127
2128 msg = (struct nd_msg *)skb_transport_header(skb);
2129 if (msg->icmph.icmp6_code == 0 &&
2130 msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
2131 return neigh_reduce(dev, skb);
2132 }
7a9f526f 2133 eth = eth_hdr(skb);
f564f45c
CW		 2134#endif
2135 }
6681712d 2136
ee122c79
TG		 2137 if (vxlan->flags & VXLAN_F_FLOW_BASED &&
2138 info && info->mode == IP_TUNNEL_INFO_TX) {
2139 vxlan_xmit_one(skb, dev, NULL, false);
2140 return NETDEV_TX_OK;
2141 }
2142
6681712d 2143 f = vxlan_find_mac(vxlan, eth->h_dest);
ae884082
DS		 2144 did_rsc = false;
2145
2146 if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) &&
e15a00aa
CW		 2147 (ntohs(eth->h_proto) == ETH_P_IP ||
2148 ntohs(eth->h_proto) == ETH_P_IPV6)) {
ae884082
DS		 2149 did_rsc = route_shortcircuit(dev, skb);
2150 if (did_rsc)
2151 f = vxlan_find_mac(vxlan, eth->h_dest);
2152 }
2153
6681712d 2154 if (f == NULL) {
afbd8bae
MR		 2155 f = vxlan_find_mac(vxlan, all_zeros_mac);
2156 if (f == NULL) {
2157 if ((vxlan->flags & VXLAN_F_L2MISS) &&
2158 !is_multicast_ether_addr(eth->h_dest))
2159 vxlan_fdb_miss(vxlan, eth->h_dest);
2160
2161 dev->stats.tx_dropped++;
8f646c92 2162 kfree_skb(skb);
afbd8bae
MR		 2163 return NETDEV_TX_OK;
2164 }
2165 }
6681712d 2166
afbd8bae
MR		 2167 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2168 struct sk_buff *skb1;
6681712d 2169
8f646c92
ED		 2170 if (!fdst) {
2171 fdst = rdst;
2172 continue;
2173 }
afbd8bae
MR		 2174 skb1 = skb_clone(skb, GFP_ATOMIC);
2175 if (skb1)
2176 vxlan_xmit_one(skb1, dev, rdst, did_rsc);
6681712d
DS		 2177 }
2178
8f646c92
ED		 2179 if (fdst)
2180 vxlan_xmit_one(skb, dev, fdst, did_rsc);
2181 else
2182 kfree_skb(skb);
4ad16930 2183 return NETDEV_TX_OK;
6681712d
DS		 2184}
2185
d342894c 2186/* Walk the forwarding table and purge stale entries */
2187static void vxlan_cleanup(unsigned long arg)
2188{
2189 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
2190 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2191 unsigned int h;
2192
2193 if (!netif_running(vxlan->dev))
2194 return;
2195
d342894c 2196 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2197 struct hlist_node *p, *n;
14e1d0fa
SD		 2198
2199 spin_lock_bh(&vxlan->hash_lock);
d342894c 2200 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2201 struct vxlan_fdb *f
2202 = container_of(p, struct vxlan_fdb, hlist);
2203 unsigned long timeout;
2204
3c172868 2205 if (f->state & NUD_PERMANENT)
d342894c 2206 continue;
2207
0dfbdf41 2208 timeout = f->used + vxlan->cfg.age_interval * HZ;
d342894c 2209 if (time_before_eq(timeout, jiffies)) {
2210 netdev_dbg(vxlan->dev,
2211 "garbage collect %pM\n",
2212 f->eth_addr);
2213 f->state = NUD_STALE;
2214 vxlan_fdb_destroy(vxlan, f);
2215 } else if (time_before(timeout, next_timer))
2216 next_timer = timeout;
2217 }
14e1d0fa 2218 spin_unlock_bh(&vxlan->hash_lock);
d342894c 2219 }
d342894c 2220
2221 mod_timer(&vxlan->age_timer, next_timer);
2222}
2223
9c2e24e1
PS		 2224static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
2225{
56ef9c90 2226 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
9c2e24e1
PS		 2227 __u32 vni = vxlan->default_dst.remote_vni;
2228
2229 vxlan->vn_sock = vs;
56ef9c90 2230 spin_lock(&vn->sock_lock);
9c2e24e1 2231 hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
56ef9c90 2232 spin_unlock(&vn->sock_lock);
9c2e24e1
PS		 2233}
2234
d342894c 2235/* Setup stats when device is created */
2236static int vxlan_init(struct net_device *dev)
2237{
1c213bd2 2238 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
e8171045 2239 if (!dev->tstats)
d342894c 2240 return -ENOMEM;
2241
2242 return 0;
2243}
2244
ba609e9b 2245static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan)
afbd8bae
MR		 2246{
2247 struct vxlan_fdb *f;
2248
2249 spin_lock_bh(&vxlan->hash_lock);
2250 f = __vxlan_find_mac(vxlan, all_zeros_mac);
2251 if (f)
2252 vxlan_fdb_destroy(vxlan, f);
2253 spin_unlock_bh(&vxlan->hash_lock);
2254}
2255
ebf4063e
SH		 2256static void vxlan_uninit(struct net_device *dev)
2257{
2258 struct vxlan_dev *vxlan = netdev_priv(dev);
ebf4063e 2259
ba609e9b 2260 vxlan_fdb_delete_default(vxlan);
afbd8bae 2261
ebf4063e
SH		 2262 free_percpu(dev->tstats);
2263}
2264
d342894c 2265/* Start ageing timer and join group when device is brought up */
2266static int vxlan_open(struct net_device *dev)
2267{
2268 struct vxlan_dev *vxlan = netdev_priv(dev);
56ef9c90
MRL		 2269 struct vxlan_sock *vs;
2270 int ret = 0;
1c51a915 2271
0dfbdf41
TG		 2272 vs = vxlan_sock_add(vxlan->net, vxlan->cfg.dst_port, vxlan_rcv,
2273 NULL, vxlan->cfg.no_share, vxlan->flags);
56ef9c90
MRL		 2274 if (IS_ERR(vs))
2275 return PTR_ERR(vs);
2276
2277 vxlan_vs_add_dev(vs, vxlan);
d342894c 2278
79d4a94f 2279 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
56ef9c90
MRL		 2280 ret = vxlan_igmp_join(vxlan);
2281 if (ret) {
2282 vxlan_sock_release(vs);
2283 return ret;
2284 }
d342894c 2285 }
2286
0dfbdf41 2287 if (vxlan->cfg.age_interval)
d342894c 2288 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2289
56ef9c90 2290 return ret;
d342894c 2291}
2292
2293/* Purge the forwarding table */
2294static void vxlan_flush(struct vxlan_dev *vxlan)
2295{
31fec5aa 2296 unsigned int h;
d342894c 2297
2298 spin_lock_bh(&vxlan->hash_lock);
2299 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2300 struct hlist_node *p, *n;
2301 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2302 struct vxlan_fdb *f
2303 = container_of(p, struct vxlan_fdb, hlist);
afbd8bae
MR		 2304 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2305 if (!is_zero_ether_addr(f->eth_addr))
2306 vxlan_fdb_destroy(vxlan, f);
d342894c 2307 }
2308 }
2309 spin_unlock_bh(&vxlan->hash_lock);
2310}
2311
2312/* Cleanup timer and forwarding table on shutdown */
2313static int vxlan_stop(struct net_device *dev)
2314{
2315 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2316 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
1c51a915 2317 struct vxlan_sock *vs = vxlan->vn_sock;
56ef9c90 2318 int ret = 0;
d342894c 2319
24c0e683 2320 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
f13b1689 2321 !vxlan_group_used(vn, vxlan))
56ef9c90 2322 ret = vxlan_igmp_leave(vxlan);
d342894c 2323
2324 del_timer_sync(&vxlan->age_timer);
2325
2326 vxlan_flush(vxlan);
56ef9c90 2327 vxlan_sock_release(vs);
d342894c 2328
56ef9c90 2329 return ret;
d342894c 2330}
2331
d342894c 2332/* Stub, nothing needs to be done. */
2333static void vxlan_set_multicast_list(struct net_device *dev)
2334{
2335}
2336
345010b5
DB		 2337static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2338{
2339 struct vxlan_dev *vxlan = netdev_priv(dev);
2340 struct vxlan_rdst *dst = &vxlan->default_dst;
2341 struct net_device *lowerdev;
2342 int max_mtu;
2343
f01ec1c0 2344 lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex);
345010b5
DB		 2345 if (lowerdev == NULL)
2346 return eth_change_mtu(dev, new_mtu);
2347
2348 if (dst->remote_ip.sa.sa_family == AF_INET6)
2349 max_mtu = lowerdev->mtu - VXLAN6_HEADROOM;
2350 else
2351 max_mtu = lowerdev->mtu - VXLAN_HEADROOM;
2352
2353 if (new_mtu < 68 || new_mtu > max_mtu)
2354 return -EINVAL;
2355
2356 dev->mtu = new_mtu;
2357 return 0;
2358}
2359
d342894c 2360static const struct net_device_ops vxlan_netdev_ops = {
2361 .ndo_init = vxlan_init,
ebf4063e 2362 .ndo_uninit = vxlan_uninit,
d342894c 2363 .ndo_open = vxlan_open,
2364 .ndo_stop = vxlan_stop,
2365 .ndo_start_xmit = vxlan_xmit,
e8171045 2366 .ndo_get_stats64 = ip_tunnel_get_stats64,
d342894c 2367 .ndo_set_rx_mode = vxlan_set_multicast_list,
345010b5 2368 .ndo_change_mtu = vxlan_change_mtu,
d342894c 2369 .ndo_validate_addr = eth_validate_addr,
2370 .ndo_set_mac_address = eth_mac_addr,
2371 .ndo_fdb_add = vxlan_fdb_add,
2372 .ndo_fdb_del = vxlan_fdb_delete,
2373 .ndo_fdb_dump = vxlan_fdb_dump,
2374};
2375
2376/* Info for udev, that this is a virtual tunnel endpoint */
2377static struct device_type vxlan_type = {
2378 .name = "vxlan",
2379};
2380
53cf5275 2381/* Calls the ndo_add_vxlan_port of the caller in order to
35e42379
JG		 2382 * supply the listening VXLAN udp ports. Callers are expected
2383 * to implement the ndo_add_vxlan_port.
53cf5275
JG		 2384 */
2385void vxlan_get_rx_port(struct net_device *dev)
2386{
2387 struct vxlan_sock *vs;
2388 struct net *net = dev_net(dev);
2389 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2390 sa_family_t sa_family;
35e42379
JG		 2391 __be16 port;
2392 unsigned int i;
53cf5275
JG		 2393
2394 spin_lock(&vn->sock_lock);
2395 for (i = 0; i < PORT_HASH_SIZE; ++i) {
35e42379
JG		 2396 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2397 port = inet_sk(vs->sock->sk)->inet_sport;
53cf5275
JG		 2398 sa_family = vs->sock->sk->sk_family;
2399 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
2400 port);
2401 }
2402 }
2403 spin_unlock(&vn->sock_lock);
2404}
2405EXPORT_SYMBOL_GPL(vxlan_get_rx_port);
2406
d342894c 2407/* Initialize the device structure. */
2408static void vxlan_setup(struct net_device *dev)
2409{
2410 struct vxlan_dev *vxlan = netdev_priv(dev);
31fec5aa 2411 unsigned int h;
d342894c 2412
2413 eth_hw_addr_random(dev);
2414 ether_setup(dev);
e4c7ed41 2415 if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6)
2853af6a 2416 dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM;
e4c7ed41 2417 else
2853af6a 2418 dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM;
d342894c 2419
2420 dev->netdev_ops = &vxlan_netdev_ops;
ebf4063e 2421 dev->destructor = free_netdev;
d342894c 2422 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2423
2424 dev->tx_queue_len = 0;
2425 dev->features |= NETIF_F_LLTX;
d6727fe3 2426 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
0afb1666 2427 dev->features |= NETIF_F_RXCSUM;
05c0db08 2428 dev->features |= NETIF_F_GSO_SOFTWARE;
0afb1666 2429
1eaa8178
PS		 2430 dev->vlan_features = dev->features;
2431 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
0afb1666 2432 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
05c0db08 2433 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1eaa8178 2434 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
02875878 2435 netif_keep_dst(dev);
6602d007 2436 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
d342894c 2437
553675fb 2438 INIT_LIST_HEAD(&vxlan->next);
d342894c 2439 spin_lock_init(&vxlan->hash_lock);
2440
2441 init_timer_deferrable(&vxlan->age_timer);
2442 vxlan->age_timer.function = vxlan_cleanup;
2443 vxlan->age_timer.data = (unsigned long) vxlan;
2444
0dfbdf41 2445 vxlan->cfg.dst_port = htons(vxlan_port);
05f47d69 2446
d342894c 2447 vxlan->dev = dev;
2448
2449 for (h = 0; h < FDB_HASH_SIZE; ++h)
2450 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2451}
2452
2453static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2454 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
5d174dd8 2455 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
e4c7ed41 2456 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
d342894c 2457 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2458 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
e4c7ed41 2459 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
d342894c 2460 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2461 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
2462 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2463 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2464 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
05f47d69 2465 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
e4f67add
DS		 2466 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2467 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2468 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2469 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
ee122c79 2470 [IFLA_VXLAN_FLOWBASED] = { .type = NLA_U8 },
823aa873 2471 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
5c91ae08
TH		 2472 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2473 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2474 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
dfd8645e
TH		 2475 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2476 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
3511494c 2477 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
0ace2ca8 2478 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
d342894c 2479};
2480
2481static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
2482{
2483 if (tb[IFLA_ADDRESS]) {
2484 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2485 pr_debug("invalid link address (not ethernet)\n");
2486 return -EINVAL;
2487 }
2488
2489 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2490 pr_debug("invalid all zero ethernet address\n");
2491 return -EADDRNOTAVAIL;
2492 }
2493 }
2494
2495 if (!data)
2496 return -EINVAL;
2497
2498 if (data[IFLA_VXLAN_ID]) {
2499 __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2500 if (id >= VXLAN_VID_MASK)
2501 return -ERANGE;
2502 }
2503
05f47d69 2504 if (data[IFLA_VXLAN_PORT_RANGE]) {
2505 const struct ifla_vxlan_port_range *p
2506 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2507
2508 if (ntohs(p->high) < ntohs(p->low)) {
2509 pr_debug("port range %u .. %u not valid\n",
2510 ntohs(p->low), ntohs(p->high));
2511 return -EINVAL;
2512 }
2513 }
2514
d342894c 2515 return 0;
2516}
2517
1b13c97f
YB		 2518static void vxlan_get_drvinfo(struct net_device *netdev,
2519 struct ethtool_drvinfo *drvinfo)
2520{
2521 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2522 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2523}
2524
2525static const struct ethtool_ops vxlan_ethtool_ops = {
2526 .get_drvinfo = vxlan_get_drvinfo,
2527 .get_link = ethtool_op_get_link,
2528};
2529
553675fb 2530static void vxlan_del_work(struct work_struct *work)
2531{
2532 struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
acbf74a7 2533 udp_tunnel_sock_release(vs->sock);
553675fb 2534 kfree_rcu(vs, rcu);
2535}
2536
3ee64f39
TH		 2537static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2538 __be16 port, u32 flags)
553675fb 2539{
e4c7ed41 2540 struct socket *sock;
3ee64f39
TH		 2541 struct udp_port_cfg udp_conf;
2542 int err;
e4c7ed41 2543
3ee64f39 2544 memset(&udp_conf, 0, sizeof(udp_conf));
e4c7ed41 2545
3ee64f39
TH		 2546 if (ipv6) {
2547 udp_conf.family = AF_INET6;
3ee64f39 2548 udp_conf.use_udp6_rx_checksums =
3dc2b6a8 2549 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
3ee64f39
TH		 2550 } else {
2551 udp_conf.family = AF_INET;
e4c7ed41 2552 }
e4c7ed41 2553
3ee64f39 2554 udp_conf.local_udp_port = port;
553675fb 2555
3ee64f39
TH		 2556 /* Open UDP socket */
2557 err = udp_sock_create(net, &udp_conf, &sock);
2558 if (err < 0)
2559 return ERR_PTR(err);
e4c7ed41 2560
39deb2c7 2561 return sock;
e4c7ed41
CW		 2562}
2563
2564/* Create new listen socket if needed */
2565static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
359a0ea9
TH		 2566 vxlan_rcv_t *rcv, void *data,
2567 u32 flags)
e4c7ed41
CW		 2568{
2569 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2570 struct vxlan_sock *vs;
2571 struct socket *sock;
e4c7ed41 2572 unsigned int h;
359a0ea9 2573 bool ipv6 = !!(flags & VXLAN_F_IPV6);
acbf74a7 2574 struct udp_tunnel_sock_cfg tunnel_cfg;
e4c7ed41 2575
dc01e7d3 2576 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
e4c7ed41
CW		 2577 if (!vs)
2578 return ERR_PTR(-ENOMEM);
2579
2580 for (h = 0; h < VNI_HASH_SIZE; ++h)
2581 INIT_HLIST_HEAD(&vs->vni_list[h]);
2582
2583 INIT_WORK(&vs->del_work, vxlan_del_work);
2584
3ee64f39 2585 sock = vxlan_create_sock(net, ipv6, port, flags);
39deb2c7 2586 if (IS_ERR(sock)) {
56ef9c90
MRL		 2587 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port),
2588 PTR_ERR(sock));
553675fb 2589 kfree(vs);
e50fddc8 2590 return ERR_CAST(sock);
553675fb 2591 }
e4c7ed41
CW		 2592
2593 vs->sock = sock;
9c2e24e1 2594 atomic_set(&vs->refcnt, 1);
5cfccc5a 2595 vs->rcv = rcv;
012a5729 2596 vs->data = data;
af33c1ad 2597 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
553675fb 2598
dc01e7d3
OG		 2599 /* Initialize the vxlan udp offloads structure */
2600 vs->udp_offloads.port = port;
2601 vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive;
2602 vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete;
2603
9c2e24e1
PS		 2604 spin_lock(&vn->sock_lock);
2605 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
dc01e7d3 2606 vxlan_notify_add_rx_port(vs);
9c2e24e1 2607 spin_unlock(&vn->sock_lock);
553675fb 2608
2609 /* Mark socket as an encapsulation socket. */
acbf74a7
AZ		 2610 tunnel_cfg.sk_user_data = vs;
2611 tunnel_cfg.encap_type = 1;
2612 tunnel_cfg.encap_rcv = vxlan_udp_encap_recv;
2613 tunnel_cfg.encap_destroy = NULL;
2614
2615 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
e4c7ed41 2616
9c2e24e1
PS		 2617 return vs;
2618}
2619
012a5729
PS		 2620struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
2621 vxlan_rcv_t *rcv, void *data,
359a0ea9 2622 bool no_share, u32 flags)
9c2e24e1
PS		 2623{
2624 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2625 struct vxlan_sock *vs;
19ca9fc1 2626 bool ipv6 = flags & VXLAN_F_IPV6;
9c2e24e1 2627
56ef9c90
MRL		 2628 if (!no_share) {
2629 spin_lock(&vn->sock_lock);
2630 vs = vxlan_find_sock(net, ipv6 ? AF_INET6 : AF_INET, port,
2631 flags);
2632 if (vs && vs->rcv == rcv) {
2633 if (!atomic_add_unless(&vs->refcnt, 1, 0))
2634 vs = ERR_PTR(-EBUSY);
2635 spin_unlock(&vn->sock_lock);
2636 return vs;
2637 }
2638 spin_unlock(&vn->sock_lock);
2639 }
9c2e24e1 2640
56ef9c90 2641 return vxlan_socket_create(net, port, rcv, data, flags);
553675fb 2642}
012a5729 2643EXPORT_SYMBOL_GPL(vxlan_sock_add);
553675fb 2644
0dfbdf41
TG		 2645static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
2646 struct vxlan_config *conf)
d342894c 2647{
33564bbb 2648 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
d342894c 2649 struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 2650 struct vxlan_rdst *dst = &vxlan->default_dst;
d342894c 2651 int err;
e4c7ed41 2652 bool use_ipv6 = false;
0dfbdf41 2653 __be16 default_port = vxlan->cfg.dst_port;
d342894c 2654
33564bbb 2655 vxlan->net = src_net;
f01ec1c0 2656
0dfbdf41 2657 dst->remote_vni = conf->vni;
d342894c 2658
0dfbdf41 2659 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
d342894c 2660
0dfbdf41
TG		 2661 /* Unless IPv6 is explicitly requested, assume IPv4 */
2662 if (!dst->remote_ip.sa.sa_family)
2663 dst->remote_ip.sa.sa_family = AF_INET;
e4c7ed41 2664
0dfbdf41
TG		 2665 if (dst->remote_ip.sa.sa_family == AF_INET6 ||
2666 vxlan->cfg.saddr.sa.sa_family == AF_INET6)
e4c7ed41 2667 use_ipv6 = true;
d342894c 2668
0dfbdf41 2669 if (conf->remote_ifindex) {
34e02aa1 2670 struct net_device *lowerdev
0dfbdf41
TG		 2671 = __dev_get_by_index(src_net, conf->remote_ifindex);
2672
2673 dst->remote_ifindex = conf->remote_ifindex;
34e02aa1 2674
2675 if (!lowerdev) {
c7995c43 2676 pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
34e02aa1 2677 return -ENODEV;
2678 }
d342894c 2679
e4c7ed41
CW		 2680#if IS_ENABLED(CONFIG_IPV6)
2681 if (use_ipv6) {
2682 struct inet6_dev *idev = __in6_dev_get(lowerdev);
2683 if (idev && idev->cnf.disable_ipv6) {
2684 pr_info("IPv6 is disabled via sysctl\n");
2685 return -EPERM;
2686 }
2687 vxlan->flags |= VXLAN_F_IPV6;
2688 }
2689#endif
2690
0dfbdf41 2691 if (!conf->mtu)
e4c7ed41 2692 dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
1ba56fb4 2693
2853af6a 2694 dev->needed_headroom = lowerdev->hard_header_len +
e4c7ed41 2695 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
7bda701e 2696 } else if (use_ipv6)
2697 vxlan->flags |= VXLAN_F_IPV6;
d342894c 2698
0dfbdf41
TG		 2699 memcpy(&vxlan->cfg, conf, sizeof(*conf));
2700 if (!vxlan->cfg.dst_port)
2701 vxlan->cfg.dst_port = default_port;
2702 vxlan->flags |= conf->flags;
2703
2704 if (!vxlan->cfg.age_interval)
2705 vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
2706
2707 if (vxlan_find_vni(src_net, conf->vni, use_ipv6 ? AF_INET6 : AF_INET,
2708 vxlan->cfg.dst_port, vxlan->flags))
2709 return -EEXIST;
2710
2711 dev->ethtool_ops = &vxlan_ethtool_ops;
2712
2713 /* create an fdb entry for a valid default destination */
2714 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
2715 err = vxlan_fdb_create(vxlan, all_zeros_mac,
2716 &vxlan->default_dst.remote_ip,
2717 NUD_REACHABLE|NUD_PERMANENT,
2718 NLM_F_EXCL|NLM_F_CREATE,
2719 vxlan->cfg.dst_port,
2720 vxlan->default_dst.remote_vni,
2721 vxlan->default_dst.remote_ifindex,
2722 NTF_SELF);
2723 if (err)
2724 return err;
2725 }
2726
2727 err = register_netdevice(dev);
2728 if (err) {
2729 vxlan_fdb_delete_default(vxlan);
2730 return err;
2731 }
2732
2733 list_add(&vxlan->next, &vn->vxlan_list);
2734
2735 return 0;
2736}
2737
2738struct net_device *vxlan_dev_create(struct net *net, const char *name,
2739 u8 name_assign_type, struct vxlan_config *conf)
2740{
2741 struct nlattr *tb[IFLA_MAX+1];
2742 struct net_device *dev;
2743 int err;
2744
2745 memset(&tb, 0, sizeof(tb));
2746
2747 dev = rtnl_create_link(net, name, name_assign_type,
2748 &vxlan_link_ops, tb);
2749 if (IS_ERR(dev))
2750 return dev;
2751
2752 err = vxlan_dev_configure(net, dev, conf);
2753 if (err < 0) {
2754 free_netdev(dev);
2755 return ERR_PTR(err);
2756 }
2757
2758 return dev;
2759}
2760EXPORT_SYMBOL_GPL(vxlan_dev_create);
2761
2762static int vxlan_newlink(struct net *src_net, struct net_device *dev,
2763 struct nlattr *tb[], struct nlattr *data[])
2764{
2765 struct vxlan_config conf;
2766 int err;
2767
2768 if (!data[IFLA_VXLAN_ID])
2769 return -EINVAL;
2770
2771 memset(&conf, 0, sizeof(conf));
2772 conf.vni = nla_get_u32(data[IFLA_VXLAN_ID]);
2773
2774 if (data[IFLA_VXLAN_GROUP]) {
2775 conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
2776 } else if (data[IFLA_VXLAN_GROUP6]) {
2777 if (!IS_ENABLED(CONFIG_IPV6))
2778 return -EPFNOSUPPORT;
2779
2780 conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
2781 conf.remote_ip.sa.sa_family = AF_INET6;
2782 }
2783
2784 if (data[IFLA_VXLAN_LOCAL]) {
2785 conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
2786 conf.saddr.sa.sa_family = AF_INET;
2787 } else if (data[IFLA_VXLAN_LOCAL6]) {
2788 if (!IS_ENABLED(CONFIG_IPV6))
2789 return -EPFNOSUPPORT;
2790
2791 /* TODO: respect scope id */
2792 conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
2793 conf.saddr.sa.sa_family = AF_INET6;
2794 }
2795
2796 if (data[IFLA_VXLAN_LINK])
2797 conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
2798
d342894c 2799 if (data[IFLA_VXLAN_TOS])
0dfbdf41 2800 conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
d342894c 2801
afb97186 2802 if (data[IFLA_VXLAN_TTL])
0dfbdf41 2803 conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
afb97186 2804
d342894c 2805 if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
0dfbdf41 2806 conf.flags |= VXLAN_F_LEARN;
d342894c 2807
2808 if (data[IFLA_VXLAN_AGEING])
0dfbdf41 2809 conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
d342894c 2810
e4f67add 2811 if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
0dfbdf41 2812 conf.flags |= VXLAN_F_PROXY;
e4f67add
DS		 2813
2814 if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
0dfbdf41 2815 conf.flags |= VXLAN_F_RSC;
e4f67add
DS		 2816
2817 if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
0dfbdf41 2818 conf.flags |= VXLAN_F_L2MISS;
e4f67add
DS		 2819
2820 if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
0dfbdf41 2821 conf.flags |= VXLAN_F_L3MISS;
e4f67add 2822
d342894c 2823 if (data[IFLA_VXLAN_LIMIT])
0dfbdf41 2824 conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
d342894c 2825
ee122c79
TG		 2826 if (data[IFLA_VXLAN_FLOWBASED] &&
2827 nla_get_u8(data[IFLA_VXLAN_FLOWBASED]))
0dfbdf41 2828 conf.flags |= VXLAN_F_FLOW_BASED;
ee122c79 2829
05f47d69 2830 if (data[IFLA_VXLAN_PORT_RANGE]) {
2831 const struct ifla_vxlan_port_range *p
2832 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
0dfbdf41
TG		 2833 conf.port_min = ntohs(p->low);
2834 conf.port_max = ntohs(p->high);
05f47d69 2835 }
2836
823aa873 2837 if (data[IFLA_VXLAN_PORT])
0dfbdf41 2838 conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
823aa873 2839
359a0ea9 2840 if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
0dfbdf41 2841 conf.flags |= VXLAN_F_UDP_CSUM;
359a0ea9
TH		 2842
2843 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
2844 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
0dfbdf41 2845 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
359a0ea9
TH		 2846
2847 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
2848 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
0dfbdf41 2849 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
359a0ea9 2850
dfd8645e
TH		 2851 if (data[IFLA_VXLAN_REMCSUM_TX] &&
2852 nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
0dfbdf41 2853 conf.flags |= VXLAN_F_REMCSUM_TX;
dfd8645e
TH		 2854
2855 if (data[IFLA_VXLAN_REMCSUM_RX] &&
2856 nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
0dfbdf41 2857 conf.flags |= VXLAN_F_REMCSUM_RX;
dfd8645e 2858
3511494c 2859 if (data[IFLA_VXLAN_GBP])
0dfbdf41 2860 conf.flags |= VXLAN_F_GBP;
3511494c 2861
0ace2ca8 2862 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
0dfbdf41 2863 conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
0ace2ca8 2864
0dfbdf41
TG		 2865 err = vxlan_dev_configure(src_net, dev, &conf);
2866 switch (err) {
2867 case -ENODEV:
2868 pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
2869 break;
1b13c97f 2870
0dfbdf41
TG		 2871 case -EPERM:
2872 pr_info("IPv6 is disabled via sysctl\n");
2873 break;
d342894c 2874
0dfbdf41
TG		 2875 case -EEXIST:
2876 pr_info("duplicate VNI %u\n", conf.vni);
2877 break;
afbd8bae
MR		 2878 }
2879
0dfbdf41 2880 return err;
d342894c 2881}
2882
2883static void vxlan_dellink(struct net_device *dev, struct list_head *head)
2884{
2885 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2886 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
d342894c 2887
fe5c3561 2888 spin_lock(&vn->sock_lock);
9c2e24e1
PS		 2889 if (!hlist_unhashed(&vxlan->hlist))
2890 hlist_del_rcu(&vxlan->hlist);
fe5c3561 2891 spin_unlock(&vn->sock_lock);
2892
553675fb 2893 list_del(&vxlan->next);
d342894c 2894 unregister_netdevice_queue(dev, head);
2895}
2896
2897static size_t vxlan_get_size(const struct net_device *dev)
2898{
2899
2900 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
e4c7ed41 2901 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
d342894c 2902 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
e4c7ed41 2903 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
d342894c 2904 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
2905 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
2906 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
e4f67add
DS		 2907 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
2908 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
2909 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
2910 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
ee122c79 2911 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_FLOWBASED */
d342894c 2912 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
2913 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
05f47d69 2914 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
359a0ea9
TH		 2915 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
2916 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
2917 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
2918 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
dfd8645e
TH		 2919 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
2920 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
d342894c 2921 0;
2922}
2923
2924static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
2925{
2926 const struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 2927 const struct vxlan_rdst *dst = &vxlan->default_dst;
05f47d69 2928 struct ifla_vxlan_port_range ports = {
0dfbdf41
TG		 2929 .low = htons(vxlan->cfg.port_min),
2930 .high = htons(vxlan->cfg.port_max),
05f47d69 2931 };
d342894c 2932
c7995c43 2933 if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni))
d342894c 2934 goto nla_put_failure;
2935
e4c7ed41
CW		 2936 if (!vxlan_addr_any(&dst->remote_ip)) {
2937 if (dst->remote_ip.sa.sa_family == AF_INET) {
930345ea
JB		 2938 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
2939 dst->remote_ip.sin.sin_addr.s_addr))
e4c7ed41
CW		 2940 goto nla_put_failure;
2941#if IS_ENABLED(CONFIG_IPV6)
2942 } else {
930345ea
JB		 2943 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
2944 &dst->remote_ip.sin6.sin6_addr))
e4c7ed41
CW		 2945 goto nla_put_failure;
2946#endif
2947 }
2948 }
d342894c 2949
c7995c43 2950 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
d342894c 2951 goto nla_put_failure;
2952
0dfbdf41
TG		 2953 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
2954 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
930345ea 2955 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
0dfbdf41 2956 vxlan->cfg.saddr.sin.sin_addr.s_addr))
e4c7ed41
CW		 2957 goto nla_put_failure;
2958#if IS_ENABLED(CONFIG_IPV6)
2959 } else {
930345ea 2960 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
0dfbdf41 2961 &vxlan->cfg.saddr.sin6.sin6_addr))
e4c7ed41
CW		 2962 goto nla_put_failure;
2963#endif
2964 }
2965 }
d342894c 2966
0dfbdf41
TG		 2967 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
2968 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
e4f67add
DS		 2969 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
2970 !!(vxlan->flags & VXLAN_F_LEARN)) ||
2971 nla_put_u8(skb, IFLA_VXLAN_PROXY,
2972 !!(vxlan->flags & VXLAN_F_PROXY)) ||
2973 nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) ||
2974 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
2975 !!(vxlan->flags & VXLAN_F_L2MISS)) ||
2976 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
2977 !!(vxlan->flags & VXLAN_F_L3MISS)) ||
ee122c79
TG		 2978 nla_put_u8(skb, IFLA_VXLAN_FLOWBASED,
2979 !!(vxlan->flags & VXLAN_F_FLOW_BASED)) ||
0dfbdf41
TG		 2980 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
2981 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
2982 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
359a0ea9
TH		 2983 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
2984 !!(vxlan->flags & VXLAN_F_UDP_CSUM)) ||
2985 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
2986 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
2987 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
dfd8645e
TH		 2988 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
2989 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
2990 !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) ||
2991 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
2992 !!(vxlan->flags & VXLAN_F_REMCSUM_RX)))
d342894c 2993 goto nla_put_failure;
2994
05f47d69 2995 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
2996 goto nla_put_failure;
2997
3511494c
TG		 2998 if (vxlan->flags & VXLAN_F_GBP &&
2999 nla_put_flag(skb, IFLA_VXLAN_GBP))
3000 goto nla_put_failure;
3001
0ace2ca8
TH		 3002 if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL &&
3003 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3004 goto nla_put_failure;
3005
d342894c 3006 return 0;
3007
3008nla_put_failure:
3009 return -EMSGSIZE;
3010}
3011
1728d4fa
ND		 3012static struct net *vxlan_get_link_net(const struct net_device *dev)
3013{
3014 struct vxlan_dev *vxlan = netdev_priv(dev);
3015
3016 return vxlan->net;
3017}
3018
d342894c 3019static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3020 .kind = "vxlan",
3021 .maxtype = IFLA_VXLAN_MAX,
3022 .policy = vxlan_policy,
3023 .priv_size = sizeof(struct vxlan_dev),
3024 .setup = vxlan_setup,
3025 .validate = vxlan_validate,
3026 .newlink = vxlan_newlink,
3027 .dellink = vxlan_dellink,
3028 .get_size = vxlan_get_size,
3029 .fill_info = vxlan_fill_info,
1728d4fa 3030 .get_link_net = vxlan_get_link_net,
d342894c 3031};
3032
acaf4e70
DB		 3033static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3034 struct net_device *dev)
3035{
3036 struct vxlan_dev *vxlan, *next;
3037 LIST_HEAD(list_kill);
3038
3039 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3040 struct vxlan_rdst *dst = &vxlan->default_dst;
3041
3042 /* In case we created vxlan device with carrier
3043 * and we loose the carrier due to module unload
3044 * we also need to remove vxlan device. In other
3045 * cases, it's not necessary and remote_ifindex
3046 * is 0 here, so no matches.
3047 */
3048 if (dst->remote_ifindex == dev->ifindex)
3049 vxlan_dellink(vxlan->dev, &list_kill);
3050 }
3051
3052 unregister_netdevice_many(&list_kill);
3053}
3054
3055static int vxlan_lowerdev_event(struct notifier_block *unused,
3056 unsigned long event, void *ptr)
3057{
3058 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
783c1463 3059 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
acaf4e70 3060
783c1463 3061 if (event == NETDEV_UNREGISTER)
acaf4e70
DB		 3062 vxlan_handle_lowerdev_unregister(vn, dev);
3063
3064 return NOTIFY_DONE;
3065}
3066
3067static struct notifier_block vxlan_notifier_block __read_mostly = {
3068 .notifier_call = vxlan_lowerdev_event,
3069};
3070
d342894c 3071static __net_init int vxlan_init_net(struct net *net)
3072{
3073 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
31fec5aa 3074 unsigned int h;
d342894c 3075
553675fb 3076 INIT_LIST_HEAD(&vn->vxlan_list);
1c51a915 3077 spin_lock_init(&vn->sock_lock);
d342894c 3078
553675fb 3079 for (h = 0; h < PORT_HASH_SIZE; ++h)
3080 INIT_HLIST_HEAD(&vn->sock_list[h]);
d342894c 3081
3082 return 0;
3083}
3084
f01ec1c0
ND		 3085static void __net_exit vxlan_exit_net(struct net *net)
3086{
3087 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3088 struct vxlan_dev *vxlan, *next;
3089 struct net_device *dev, *aux;
3090 LIST_HEAD(list);
3091
3092 rtnl_lock();
3093 for_each_netdev_safe(net, dev, aux)
3094 if (dev->rtnl_link_ops == &vxlan_link_ops)
3095 unregister_netdevice_queue(dev, &list);
3096
3097 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3098 /* If vxlan->dev is in the same netns, it has already been added
3099 * to the list by the previous loop.
3100 */
3101 if (!net_eq(dev_net(vxlan->dev), net))
13c3ed6a 3102 unregister_netdevice_queue(vxlan->dev, &list);
f01ec1c0
ND		 3103 }
3104
3105 unregister_netdevice_many(&list);
3106 rtnl_unlock();
3107}
3108
d342894c 3109static struct pernet_operations vxlan_net_ops = {
3110 .init = vxlan_init_net,
f01ec1c0 3111 .exit = vxlan_exit_net,
d342894c 3112 .id = &vxlan_net_id,
3113 .size = sizeof(struct vxlan_net),
3114};
3115
3116static int __init vxlan_init_module(void)
3117{
3118 int rc;
3119
758c57d1
SH		 3120 vxlan_wq = alloc_workqueue("vxlan", 0, 0);
3121 if (!vxlan_wq)
3122 return -ENOMEM;
3123
d342894c 3124 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3125
783c1463 3126 rc = register_pernet_subsys(&vxlan_net_ops);
d342894c 3127 if (rc)
3128 goto out1;
3129
acaf4e70 3130 rc = register_netdevice_notifier(&vxlan_notifier_block);
d342894c 3131 if (rc)
3132 goto out2;
3133
acaf4e70
DB		 3134 rc = rtnl_link_register(&vxlan_link_ops);
3135 if (rc)
3136 goto out3;
d342894c 3137
acaf4e70
DB		 3138 return 0;
3139out3:
3140 unregister_netdevice_notifier(&vxlan_notifier_block);
d342894c 3141out2:
783c1463 3142 unregister_pernet_subsys(&vxlan_net_ops);
d342894c 3143out1:
758c57d1 3144 destroy_workqueue(vxlan_wq);
d342894c 3145 return rc;
3146}
7332a13b 3147late_initcall(vxlan_init_module);
d342894c 3148
3149static void __exit vxlan_cleanup_module(void)
3150{
b7153984 3151 rtnl_link_unregister(&vxlan_link_ops);
acaf4e70 3152 unregister_netdevice_notifier(&vxlan_notifier_block);
758c57d1 3153 destroy_workqueue(vxlan_wq);
783c1463
DB		 3154 unregister_pernet_subsys(&vxlan_net_ops);
3155 /* rcu_barrier() is called by netns */
d342894c 3156}
3157module_exit(vxlan_cleanup_module);
3158
3159MODULE_LICENSE("GPL");
3160MODULE_VERSION(VXLAN_VERSION);
3b8df3c6 3161MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
ead5139a 3162MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
d342894c 3163MODULE_ALIAS_RTNL_LINK("vxlan");
Linux kernel - Deliverables
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