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Merge tag 'powerpc-4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
[mirror_ubuntu-bionic-kernel.git] / drivers / net / vxlan.c
CommitLineData
d342894c 1/*
eb5ce439 2 * VXLAN: Virtual eXtensible Local Area Network
d342894c 3 *
3b8df3c6 4 * Copyright (c) 2012-2013 Vyatta Inc.
d342894c 5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
d342894c 9 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <linux/kernel.h>
d342894c 14#include <linux/module.h>
15#include <linux/errno.h>
16#include <linux/slab.h>
d342894c 17#include <linux/udp.h>
18#include <linux/igmp.h>
d342894c 19#include <linux/if_ether.h>
1b13c97f 20#include <linux/ethtool.h>
e4f67add
DS		 21#include <net/arp.h>
22#include <net/ndisc.h>
d342894c 23#include <net/ip.h>
24#include <net/icmp.h>
d342894c 25#include <net/rtnetlink.h>
d342894c 26#include <net/inet_ecn.h>
27#include <net/net_namespace.h>
28#include <net/netns/generic.h>
012a5729 29#include <net/vxlan.h>
40d29af0 30
e4c7ed41 31#if IS_ENABLED(CONFIG_IPV6)
e4c7ed41 32#include <net/ip6_tunnel.h>
660d98ca 33#include <net/ip6_checksum.h>
e4c7ed41 34#endif
d342894c 35
36#define VXLAN_VERSION "0.1"
37
553675fb 38#define PORT_HASH_BITS 8
39#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
d342894c 40#define FDB_AGE_DEFAULT 300 /* 5 min */
41#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
42
23c578bf 43/* UDP port for VXLAN traffic.
44 * The IANA assigned port is 4789, but the Linux default is 8472
234f5b73 45 * for compatibility with early adopters.
23c578bf 46 */
9daaa397
SH		 47static unsigned short vxlan_port __read_mostly = 8472;
48module_param_named(udp_port, vxlan_port, ushort, 0444);
d342894c 49MODULE_PARM_DESC(udp_port, "Destination UDP port");
50
51static bool log_ecn_error = true;
52module_param(log_ecn_error, bool, 0644);
53MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
54
c7d03a00 55static unsigned int vxlan_net_id;
0dfbdf41 56static struct rtnl_link_ops vxlan_link_ops;
553675fb 57
7256eac1 58static const u8 all_zeros_mac[ETH_ALEN + 2];
afbd8bae 59
205f356d 60static int vxlan_sock_add(struct vxlan_dev *vxlan);
614732ea 61
a53cb29b
MB		 62static void vxlan_vs_del_dev(struct vxlan_dev *vxlan);
63
553675fb 64/* per-network namespace private data for this module */
65struct vxlan_net {
66 struct list_head vxlan_list;
67 struct hlist_head sock_list[PORT_HASH_SIZE];
1c51a915 68 spinlock_t sock_lock;
553675fb 69};
70
d342894c 71/* Forwarding table entry */
72struct vxlan_fdb {
73 struct hlist_node hlist; /* linked list of entries */
74 struct rcu_head rcu;
75 unsigned long updated; /* jiffies */
76 unsigned long used;
3e61aa8f 77 struct list_head remotes;
7177a3b0 78 u8 eth_addr[ETH_ALEN];
d342894c 79 u16 state; /* see ndm_state */
3ad7a4b1 80 __be32 vni;
ae884082 81 u8 flags; /* see ndm_flags */
d342894c 82};
83
d342894c 84/* salt for hash table */
85static u32 vxlan_salt __read_mostly;
86
ee122c79
TG		 87static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
88{
e7030878
TG		 89 return vs->flags & VXLAN_F_COLLECT_METADATA ||
90 ip_tunnel_collect_metadata();
ee122c79
TG		 91}
92
e4c7ed41
CW		 93#if IS_ENABLED(CONFIG_IPV6)
94static inline
95bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
96{
f0ef3126
JB		 97 if (a->sa.sa_family != b->sa.sa_family)
98 return false;
99 if (a->sa.sa_family == AF_INET6)
100 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
101 else
102 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 103}
104
105static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
106{
f0ef3126
JB		 107 if (ipa->sa.sa_family == AF_INET6)
108 return ipv6_addr_any(&ipa->sin6.sin6_addr);
109 else
110 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 111}
112
113static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
114{
f0ef3126
JB		 115 if (ipa->sa.sa_family == AF_INET6)
116 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
117 else
118 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 119}
120
121static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
122{
f0ef3126 123 if (nla_len(nla) >= sizeof(struct in6_addr)) {
67b61f6c 124 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
f0ef3126
JB		 125 ip->sa.sa_family = AF_INET6;
126 return 0;
127 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 128 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 129 ip->sa.sa_family = AF_INET;
130 return 0;
131 } else {
132 return -EAFNOSUPPORT;
133 }
e4c7ed41
CW		 134}
135
136static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 137 const union vxlan_addr *ip)
e4c7ed41 138{
f0ef3126 139 if (ip->sa.sa_family == AF_INET6)
930345ea 140 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
f0ef3126 141 else
930345ea 142 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 143}
144
145#else /* !CONFIG_IPV6 */
146
147static inline
148bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
149{
f0ef3126 150 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 151}
152
153static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
154{
f0ef3126 155 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 156}
157
158static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
159{
f0ef3126 160 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 161}
162
163static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
164{
f0ef3126
JB		 165 if (nla_len(nla) >= sizeof(struct in6_addr)) {
166 return -EAFNOSUPPORT;
167 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 168 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 169 ip->sa.sa_family = AF_INET;
170 return 0;
171 } else {
172 return -EAFNOSUPPORT;
173 }
e4c7ed41
CW		 174}
175
176static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 177 const union vxlan_addr *ip)
e4c7ed41 178{
930345ea 179 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 180}
181#endif
182
553675fb 183/* Virtual Network hash table head */
54bfd872 184static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni)
553675fb 185{
54bfd872 186 return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)];
553675fb 187}
188
189/* Socket hash table head */
190static inline struct hlist_head *vs_head(struct net *net, __be16 port)
d342894c 191{
192 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
193
553675fb 194 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
195}
196
3e61aa8f
SH		 197/* First remote destination for a forwarding entry.
198 * Guaranteed to be non-NULL because remotes are never deleted.
199 */
5ca5461c 200static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
3e61aa8f 201{
5ca5461c 202 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
203}
204
205static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
206{
207 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
3e61aa8f
SH		 208}
209
ac5132d1
TG		 210/* Find VXLAN socket based on network namespace, address family and UDP port
211 * and enabled unshareable flags.
212 */
213static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
214 __be16 port, u32 flags)
553675fb 215{
216 struct vxlan_sock *vs;
af33c1ad
TH		 217
218 flags &= VXLAN_F_RCV_FLAGS;
553675fb 219
220 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
19ca9fc1 221 if (inet_sk(vs->sock->sk)->inet_sport == port &&
705cc62f 222 vxlan_get_sk_family(vs) == family &&
af33c1ad 223 vs->flags == flags)
553675fb 224 return vs;
225 }
226 return NULL;
d342894c 227}
228
49f810f0
MS		 229static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, int ifindex,
230 __be32 vni)
d342894c 231{
69e76661 232 struct vxlan_dev_node *node;
d342894c 233
b9167b2e
JB		 234 /* For flow based devices, map all packets to VNI 0 */
235 if (vs->flags & VXLAN_F_COLLECT_METADATA)
236 vni = 0;
237
69e76661
JB		 238 hlist_for_each_entry_rcu(node, vni_head(vs, vni), hlist) {
239 if (node->vxlan->default_dst.remote_vni != vni)
49f810f0
MS		 240 continue;
241
242 if (IS_ENABLED(CONFIG_IPV6)) {
69e76661 243 const struct vxlan_config *cfg = &node->vxlan->cfg;
49f810f0
MS		 244
245 if ((cfg->flags & VXLAN_F_IPV6_LINKLOCAL) &&
246 cfg->remote_ifindex != ifindex)
247 continue;
248 }
249
69e76661 250 return node->vxlan;
d342894c 251 }
252
253 return NULL;
254}
255
5cfccc5a 256/* Look up VNI in a per net namespace table */
49f810f0
MS		 257static struct vxlan_dev *vxlan_find_vni(struct net *net, int ifindex,
258 __be32 vni, sa_family_t family,
259 __be16 port, u32 flags)
5cfccc5a
PS		 260{
261 struct vxlan_sock *vs;
262
ac5132d1 263 vs = vxlan_find_sock(net, family, port, flags);
5cfccc5a
PS		 264 if (!vs)
265 return NULL;
266
49f810f0 267 return vxlan_vs_find_vni(vs, ifindex, vni);
5cfccc5a
PS		 268}
269
d342894c 270/* Fill in neighbour message in skbuff. */
271static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
234f5b73
SH		 272 const struct vxlan_fdb *fdb,
273 u32 portid, u32 seq, int type, unsigned int flags,
274 const struct vxlan_rdst *rdst)
d342894c 275{
276 unsigned long now = jiffies;
277 struct nda_cacheinfo ci;
278 struct nlmsghdr *nlh;
279 struct ndmsg *ndm;
e4f67add 280 bool send_ip, send_eth;
d342894c 281
282 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
283 if (nlh == NULL)
284 return -EMSGSIZE;
285
286 ndm = nlmsg_data(nlh);
287 memset(ndm, 0, sizeof(*ndm));
e4f67add
DS		 288
289 send_eth = send_ip = true;
290
291 if (type == RTM_GETNEIGH) {
e4c7ed41 292 send_ip = !vxlan_addr_any(&rdst->remote_ip);
e4f67add 293 send_eth = !is_zero_ether_addr(fdb->eth_addr);
8f48ba71 294 ndm->ndm_family = send_ip ? rdst->remote_ip.sa.sa_family : AF_INET;
e4f67add
DS		 295 } else
296 ndm->ndm_family = AF_BRIDGE;
d342894c 297 ndm->ndm_state = fdb->state;
298 ndm->ndm_ifindex = vxlan->dev->ifindex;
ae884082 299 ndm->ndm_flags = fdb->flags;
545469f7 300 ndm->ndm_type = RTN_UNICAST;
d342894c 301
193523bf 302 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
4967082b 303 nla_put_s32(skb, NDA_LINK_NETNSID,
38f507f1 304 peernet2id(dev_net(vxlan->dev), vxlan->net)))
193523bf
ND		 305 goto nla_put_failure;
306
e4f67add 307 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
d342894c 308 goto nla_put_failure;
309
e4c7ed41 310 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
6681712d
DS		 311 goto nla_put_failure;
312
0dfbdf41 313 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
6681712d
DS		 314 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
315 goto nla_put_failure;
c7995c43 316 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
54bfd872 317 nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni)))
6681712d 318 goto nla_put_failure;
dc5321d7 319 if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && fdb->vni &&
3ad7a4b1
RP		 320 nla_put_u32(skb, NDA_SRC_VNI,
321 be32_to_cpu(fdb->vni)))
322 goto nla_put_failure;
6681712d
DS		 323 if (rdst->remote_ifindex &&
324 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
d342894c 325 goto nla_put_failure;
326
327 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
328 ci.ndm_confirmed = 0;
329 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
330 ci.ndm_refcnt = 0;
331
332 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
333 goto nla_put_failure;
334
053c095a
JB		 335 nlmsg_end(skb, nlh);
336 return 0;
d342894c 337
338nla_put_failure:
339 nlmsg_cancel(skb, nlh);
340 return -EMSGSIZE;
341}
342
343static inline size_t vxlan_nlmsg_size(void)
344{
345 return NLMSG_ALIGN(sizeof(struct ndmsg))
346 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
e4c7ed41 347 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
73cf3317 348 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
6681712d
DS		 349 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
350 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
4967082b 351 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
d342894c 352 + nla_total_size(sizeof(struct nda_cacheinfo));
353}
354
9e4b93f9
ND		 355static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
356 struct vxlan_rdst *rd, int type)
d342894c 357{
358 struct net *net = dev_net(vxlan->dev);
359 struct sk_buff *skb;
360 int err = -ENOBUFS;
361
362 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
363 if (skb == NULL)
364 goto errout;
365
9e4b93f9 366 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
d342894c 367 if (err < 0) {
368 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
369 WARN_ON(err == -EMSGSIZE);
370 kfree_skb(skb);
371 goto errout;
372 }
373
374 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
375 return;
376errout:
377 if (err < 0)
378 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
379}
380
e4c7ed41 381static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
e4f67add
DS		 382{
383 struct vxlan_dev *vxlan = netdev_priv(dev);
bb3fd687
SH		 384 struct vxlan_fdb f = {
385 .state = NUD_STALE,
386 };
387 struct vxlan_rdst remote = {
e4c7ed41 388 .remote_ip = *ipa, /* goes to NDA_DST */
54bfd872 389 .remote_vni = cpu_to_be32(VXLAN_N_VID),
bb3fd687 390 };
3e61aa8f 391
9e4b93f9 392 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 393}
394
395static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
396{
bb3fd687
SH		 397 struct vxlan_fdb f = {
398 .state = NUD_STALE,
399 };
9e4b93f9 400 struct vxlan_rdst remote = { };
e4f67add 401
e4f67add
DS		 402 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
403
9e4b93f9 404 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 405}
406
d342894c 407/* Hash Ethernet address */
408static u32 eth_hash(const unsigned char *addr)
409{
410 u64 value = get_unaligned((u64 *)addr);
411
412 /* only want 6 bytes */
413#ifdef __BIG_ENDIAN
d342894c 414 value >>= 16;
321fb991 415#else
416 value <<= 16;
d342894c 417#endif
418 return hash_64(value, FDB_HASH_BITS);
419}
420
3ad7a4b1
RP		 421static u32 eth_vni_hash(const unsigned char *addr, __be32 vni)
422{
423 /* use 1 byte of OUI and 3 bytes of NIC */
424 u32 key = get_unaligned((u32 *)(addr + 2));
425
426 return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1);
427}
428
d342894c 429/* Hash chain to use given mac address */
430static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
3ad7a4b1 431 const u8 *mac, __be32 vni)
d342894c 432{
dc5321d7 433 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)
3ad7a4b1
RP		 434 return &vxlan->fdb_head[eth_vni_hash(mac, vni)];
435 else
436 return &vxlan->fdb_head[eth_hash(mac)];
d342894c 437}
438
439/* Look up Ethernet address in forwarding table */
014be2c8 440static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
3ad7a4b1 441 const u8 *mac, __be32 vni)
d342894c 442{
3ad7a4b1 443 struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni);
d342894c 444 struct vxlan_fdb *f;
d342894c 445
b67bfe0d 446 hlist_for_each_entry_rcu(f, head, hlist) {
3ad7a4b1 447 if (ether_addr_equal(mac, f->eth_addr)) {
dc5321d7 448 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) {
3ad7a4b1
RP		 449 if (vni == f->vni)
450 return f;
451 } else {
452 return f;
453 }
454 }
d342894c 455 }
456
457 return NULL;
458}
459
014be2c8 460static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
3ad7a4b1 461 const u8 *mac, __be32 vni)
014be2c8
SS		 462{
463 struct vxlan_fdb *f;
464
3ad7a4b1 465 f = __vxlan_find_mac(vxlan, mac, vni);
014be2c8
SS		 466 if (f)
467 f->used = jiffies;
468
469 return f;
470}
471
a5e7c10a
MR		 472/* caller should hold vxlan->hash_lock */
473static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
e4c7ed41 474 union vxlan_addr *ip, __be16 port,
54bfd872 475 __be32 vni, __u32 ifindex)
6681712d 476{
3e61aa8f 477 struct vxlan_rdst *rd;
6681712d 478
3e61aa8f 479 list_for_each_entry(rd, &f->remotes, list) {
e4c7ed41 480 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
6681712d
DS		 481 rd->remote_port == port &&
482 rd->remote_vni == vni &&
483 rd->remote_ifindex == ifindex)
a5e7c10a 484 return rd;
6681712d 485 }
3e61aa8f 486
a5e7c10a
MR		 487 return NULL;
488}
489
906dc186
TR		 490/* Replace destination of unicast mac */
491static int vxlan_fdb_replace(struct vxlan_fdb *f,
54bfd872
JB		 492 union vxlan_addr *ip, __be16 port, __be32 vni,
493 __u32 ifindex)
906dc186
TR		 494{
495 struct vxlan_rdst *rd;
496
497 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
498 if (rd)
499 return 0;
500
501 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
502 if (!rd)
503 return 0;
0c1d70af
PA		 504
505 dst_cache_reset(&rd->dst_cache);
e4c7ed41 506 rd->remote_ip = *ip;
906dc186
TR		 507 rd->remote_port = port;
508 rd->remote_vni = vni;
509 rd->remote_ifindex = ifindex;
510 return 1;
511}
512
a5e7c10a
MR		 513/* Add/update destinations for multicast */
514static int vxlan_fdb_append(struct vxlan_fdb *f,
54bfd872 515 union vxlan_addr *ip, __be16 port, __be32 vni,
9e4b93f9 516 __u32 ifindex, struct vxlan_rdst **rdp)
a5e7c10a
MR		 517{
518 struct vxlan_rdst *rd;
519
520 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
521 if (rd)
522 return 0;
523
6681712d
DS		 524 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
525 if (rd == NULL)
526 return -ENOBUFS;
0c1d70af
PA		 527
528 if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) {
529 kfree(rd);
530 return -ENOBUFS;
531 }
532
e4c7ed41 533 rd->remote_ip = *ip;
6681712d
DS		 534 rd->remote_port = port;
535 rd->remote_vni = vni;
536 rd->remote_ifindex = ifindex;
3e61aa8f
SH		 537
538 list_add_tail_rcu(&rd->list, &f->remotes);
539
9e4b93f9 540 *rdp = rd;
6681712d
DS		 541 return 1;
542}
543
dfd8645e
TH		 544static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
545 unsigned int off,
546 struct vxlanhdr *vh, size_t hdrlen,
54bfd872
JB		 547 __be32 vni_field,
548 struct gro_remcsum *grc,
0ace2ca8 549 bool nopartial)
dfd8645e 550{
b7fe10e5 551 size_t start, offset;
dfd8645e
TH		 552
553 if (skb->remcsum_offload)
b7fe10e5 554 return vh;
dfd8645e
TH		 555
556 if (!NAPI_GRO_CB(skb)->csum_valid)
557 return NULL;
558
54bfd872
JB		 559 start = vxlan_rco_start(vni_field);
560 offset = start + vxlan_rco_offset(vni_field);
dfd8645e 561
b7fe10e5
TH		 562 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
563 start, offset, grc, nopartial);
dfd8645e
TH		 564
565 skb->remcsum_offload = 1;
566
567 return vh;
568}
569
5602c48c
TH		 570static struct sk_buff **vxlan_gro_receive(struct sock *sk,
571 struct sk_buff **head,
572 struct sk_buff *skb)
dc01e7d3
OG		 573{
574 struct sk_buff *p, **pp = NULL;
575 struct vxlanhdr *vh, *vh2;
9b174d88 576 unsigned int hlen, off_vx;
dc01e7d3 577 int flush = 1;
5602c48c 578 struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk);
54bfd872 579 __be32 flags;
26c4f7da
TH		 580 struct gro_remcsum grc;
581
582 skb_gro_remcsum_init(&grc);
dc01e7d3
OG		 583
584 off_vx = skb_gro_offset(skb);
585 hlen = off_vx + sizeof(*vh);
586 vh = skb_gro_header_fast(skb, off_vx);
587 if (skb_gro_header_hard(skb, hlen)) {
588 vh = skb_gro_header_slow(skb, hlen, off_vx);
589 if (unlikely(!vh))
590 goto out;
591 }
dc01e7d3 592
dfd8645e
TH		 593 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
594
54bfd872 595 flags = vh->vx_flags;
dfd8645e
TH		 596
597 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
598 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
54bfd872 599 vh->vx_vni, &grc,
0ace2ca8
TH		 600 !!(vs->flags &
601 VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 602
603 if (!vh)
604 goto out;
605 }
606
b7fe10e5
TH		 607 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
608
dc01e7d3
OG		 609 for (p = *head; p; p = p->next) {
610 if (!NAPI_GRO_CB(p)->same_flow)
611 continue;
612
613 vh2 = (struct vxlanhdr *)(p->data + off_vx);
3511494c
TG		 614 if (vh->vx_flags != vh2->vx_flags ||
615 vh->vx_vni != vh2->vx_vni) {
dc01e7d3
OG		 616 NAPI_GRO_CB(p)->same_flow = 0;
617 continue;
618 }
dc01e7d3
OG		 619 }
620
fcd91dd4 621 pp = call_gro_receive(eth_gro_receive, head, skb);
c194cf93 622 flush = 0;
dc01e7d3 623
dc01e7d3 624out:
26c4f7da 625 skb_gro_remcsum_cleanup(skb, &grc);
dc01e7d3
OG		 626 NAPI_GRO_CB(skb)->flush |= flush;
627
628 return pp;
629}
630
5602c48c 631static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff)
dc01e7d3 632{
229740c6
JR		 633 /* Sets 'skb->inner_mac_header' since we are always called with
634 * 'skb->encapsulation' set.
635 */
9b174d88 636 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
dc01e7d3
OG		 637}
638
d342894c 639/* Add new entry to forwarding table -- assumes lock held */
640static int vxlan_fdb_create(struct vxlan_dev *vxlan,
e4c7ed41 641 const u8 *mac, union vxlan_addr *ip,
6681712d 642 __u16 state, __u16 flags,
3ad7a4b1
RP		 643 __be16 port, __be32 src_vni, __be32 vni,
644 __u32 ifindex, __u8 ndm_flags)
d342894c 645{
9e4b93f9 646 struct vxlan_rdst *rd = NULL;
d342894c 647 struct vxlan_fdb *f;
648 int notify = 0;
17b46365 649 int rc;
d342894c 650
3ad7a4b1 651 f = __vxlan_find_mac(vxlan, mac, src_vni);
d342894c 652 if (f) {
653 if (flags & NLM_F_EXCL) {
654 netdev_dbg(vxlan->dev,
655 "lost race to create %pM\n", mac);
656 return -EEXIST;
657 }
658 if (f->state != state) {
659 f->state = state;
660 f->updated = jiffies;
661 notify = 1;
662 }
ae884082
DS		 663 if (f->flags != ndm_flags) {
664 f->flags = ndm_flags;
665 f->updated = jiffies;
666 notify = 1;
667 }
906dc186
TR		 668 if ((flags & NLM_F_REPLACE)) {
669 /* Only change unicasts */
670 if (!(is_multicast_ether_addr(f->eth_addr) ||
671 is_zero_ether_addr(f->eth_addr))) {
60840429 672 notify |= vxlan_fdb_replace(f, ip, port, vni,
906dc186 673 ifindex);
906dc186
TR		 674 } else
675 return -EOPNOTSUPP;
676 }
6681712d 677 if ((flags & NLM_F_APPEND) &&
58e4c767
MR		 678 (is_multicast_ether_addr(f->eth_addr) ||
679 is_zero_ether_addr(f->eth_addr))) {
17b46365 680 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
6681712d
DS		 681
682 if (rc < 0)
683 return rc;
684 notify |= rc;
685 }
d342894c 686 } else {
687 if (!(flags & NLM_F_CREATE))
688 return -ENOENT;
689
0dfbdf41
TG		 690 if (vxlan->cfg.addrmax &&
691 vxlan->addrcnt >= vxlan->cfg.addrmax)
d342894c 692 return -ENOSPC;
693
906dc186
TR		 694 /* Disallow replace to add a multicast entry */
695 if ((flags & NLM_F_REPLACE) &&
696 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
697 return -EOPNOTSUPP;
698
e4c7ed41 699 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
d342894c 700 f = kmalloc(sizeof(*f), GFP_ATOMIC);
701 if (!f)
702 return -ENOMEM;
703
704 notify = 1;
d342894c 705 f->state = state;
ae884082 706 f->flags = ndm_flags;
d342894c 707 f->updated = f->used = jiffies;
3ad7a4b1 708 f->vni = src_vni;
3e61aa8f 709 INIT_LIST_HEAD(&f->remotes);
d342894c 710 memcpy(f->eth_addr, mac, ETH_ALEN);
711
17b46365
HY		 712 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
713 if (rc < 0) {
714 kfree(f);
715 return rc;
716 }
3e61aa8f 717
d342894c 718 ++vxlan->addrcnt;
719 hlist_add_head_rcu(&f->hlist,
3ad7a4b1 720 vxlan_fdb_head(vxlan, mac, src_vni));
d342894c 721 }
722
9e4b93f9
ND		 723 if (notify) {
724 if (rd == NULL)
725 rd = first_remote_rtnl(f);
726 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
727 }
d342894c 728
729 return 0;
730}
731
6706c82e 732static void vxlan_fdb_free(struct rcu_head *head)
6681712d
DS		 733{
734 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
3e61aa8f 735 struct vxlan_rdst *rd, *nd;
6681712d 736
0c1d70af
PA		 737 list_for_each_entry_safe(rd, nd, &f->remotes, list) {
738 dst_cache_destroy(&rd->dst_cache);
6681712d 739 kfree(rd);
0c1d70af 740 }
6681712d
DS		 741 kfree(f);
742}
743
d342894c 744static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
745{
746 netdev_dbg(vxlan->dev,
747 "delete %pM\n", f->eth_addr);
748
749 --vxlan->addrcnt;
9e4b93f9 750 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
d342894c 751
752 hlist_del_rcu(&f->hlist);
6681712d 753 call_rcu(&f->rcu, vxlan_fdb_free);
d342894c 754}
755
35cf2845
LR		 756static void vxlan_dst_free(struct rcu_head *head)
757{
758 struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu);
759
760 dst_cache_destroy(&rd->dst_cache);
761 kfree(rd);
762}
763
764static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,
765 struct vxlan_rdst *rd)
766{
767 list_del_rcu(&rd->list);
768 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
769 call_rcu(&rd->rcu, vxlan_dst_free);
770}
771
f0b074be 772static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
3ad7a4b1
RP		 773 union vxlan_addr *ip, __be16 *port, __be32 *src_vni,
774 __be32 *vni, u32 *ifindex)
d342894c 775{
6681712d 776 struct net *net = dev_net(vxlan->dev);
e4c7ed41 777 int err;
d342894c 778
f0b074be 779 if (tb[NDA_DST]) {
e4c7ed41
CW		 780 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
781 if (err)
782 return err;
f0b074be 783 } else {
e4c7ed41
CW		 784 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
785 if (remote->sa.sa_family == AF_INET) {
786 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
787 ip->sa.sa_family = AF_INET;
788#if IS_ENABLED(CONFIG_IPV6)
789 } else {
790 ip->sin6.sin6_addr = in6addr_any;
791 ip->sa.sa_family = AF_INET6;
792#endif
793 }
f0b074be 794 }
d342894c 795
6681712d 796 if (tb[NDA_PORT]) {
73cf3317 797 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
6681712d 798 return -EINVAL;
f0b074be
MR		 799 *port = nla_get_be16(tb[NDA_PORT]);
800 } else {
0dfbdf41 801 *port = vxlan->cfg.dst_port;
f0b074be 802 }
6681712d
DS		 803
804 if (tb[NDA_VNI]) {
805 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
806 return -EINVAL;
54bfd872 807 *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
f0b074be
MR		 808 } else {
809 *vni = vxlan->default_dst.remote_vni;
810 }
6681712d 811
3ad7a4b1
RP		 812 if (tb[NDA_SRC_VNI]) {
813 if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32))
814 return -EINVAL;
815 *src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI]));
816 } else {
817 *src_vni = vxlan->default_dst.remote_vni;
818 }
819
6681712d 820 if (tb[NDA_IFINDEX]) {
5abb0029 821 struct net_device *tdev;
6681712d
DS		 822
823 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
824 return -EINVAL;
f0b074be 825 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
73763949 826 tdev = __dev_get_by_index(net, *ifindex);
5abb0029 827 if (!tdev)
6681712d 828 return -EADDRNOTAVAIL;
f0b074be
MR		 829 } else {
830 *ifindex = 0;
831 }
832
833 return 0;
834}
835
836/* Add static entry (via netlink) */
837static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
838 struct net_device *dev,
f6f6424b 839 const unsigned char *addr, u16 vid, u16 flags)
f0b074be
MR		 840{
841 struct vxlan_dev *vxlan = netdev_priv(dev);
842 /* struct net *net = dev_net(vxlan->dev); */
e4c7ed41 843 union vxlan_addr ip;
f0b074be 844 __be16 port;
3ad7a4b1 845 __be32 src_vni, vni;
54bfd872 846 u32 ifindex;
f0b074be
MR		 847 int err;
848
849 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
850 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
851 ndm->ndm_state);
852 return -EINVAL;
853 }
854
855 if (tb[NDA_DST] == NULL)
856 return -EINVAL;
857
3ad7a4b1 858 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex);
f0b074be
MR		 859 if (err)
860 return err;
6681712d 861
5933a7bb
MR		 862 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
863 return -EAFNOSUPPORT;
864
d342894c 865 spin_lock_bh(&vxlan->hash_lock);
e4c7ed41 866 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
3ad7a4b1 867 port, src_vni, vni, ifindex, ndm->ndm_flags);
d342894c 868 spin_unlock_bh(&vxlan->hash_lock);
869
870 return err;
871}
872
3ad7a4b1
RP		 873static int __vxlan_fdb_delete(struct vxlan_dev *vxlan,
874 const unsigned char *addr, union vxlan_addr ip,
875 __be16 port, __be32 src_vni, u32 vni, u32 ifindex,
876 u16 vid)
d342894c 877{
d342894c 878 struct vxlan_fdb *f;
bc7892ba 879 struct vxlan_rdst *rd = NULL;
3ad7a4b1 880 int err = -ENOENT;
bc7892ba 881
3ad7a4b1 882 f = vxlan_find_mac(vxlan, addr, src_vni);
bc7892ba 883 if (!f)
3ad7a4b1 884 return err;
bc7892ba 885
e4c7ed41
CW		 886 if (!vxlan_addr_any(&ip)) {
887 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
bc7892ba
MR		 888 if (!rd)
889 goto out;
890 }
891
bc7892ba
MR		 892 /* remove a destination if it's not the only one on the list,
893 * otherwise destroy the fdb entry
894 */
895 if (rd && !list_is_singular(&f->remotes)) {
35cf2845 896 vxlan_fdb_dst_destroy(vxlan, f, rd);
bc7892ba 897 goto out;
d342894c 898 }
bc7892ba
MR		 899
900 vxlan_fdb_destroy(vxlan, f);
901
902out:
3ad7a4b1
RP		 903 return 0;
904}
905
906/* Delete entry (via netlink) */
907static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
908 struct net_device *dev,
909 const unsigned char *addr, u16 vid)
910{
911 struct vxlan_dev *vxlan = netdev_priv(dev);
912 union vxlan_addr ip;
913 __be32 src_vni, vni;
914 __be16 port;
915 u32 ifindex;
916 int err;
917
918 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex);
919 if (err)
920 return err;
921
922 spin_lock_bh(&vxlan->hash_lock);
923 err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex,
924 vid);
d342894c 925 spin_unlock_bh(&vxlan->hash_lock);
926
927 return err;
928}
929
930/* Dump forwarding table */
931static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3 932 struct net_device *dev,
d297653d 933 struct net_device *filter_dev, int *idx)
d342894c 934{
935 struct vxlan_dev *vxlan = netdev_priv(dev);
936 unsigned int h;
d297653d 937 int err = 0;
d342894c 938
939 for (h = 0; h < FDB_HASH_SIZE; ++h) {
940 struct vxlan_fdb *f;
d342894c 941
b67bfe0d 942 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
6681712d 943 struct vxlan_rdst *rd;
6681712d 944
3e61aa8f 945 list_for_each_entry_rcu(rd, &f->remotes, list) {
d297653d 946 if (*idx < cb->args[2])
07a51cd3
AW		 947 goto skip;
948
6681712d
DS		 949 err = vxlan_fdb_info(skb, vxlan, f,
950 NETLINK_CB(cb->skb).portid,
951 cb->nlh->nlmsg_seq,
952 RTM_NEWNEIGH,
953 NLM_F_MULTI, rd);
d297653d 954 if (err < 0)
3e61aa8f 955 goto out;
3e61aa8f 956skip:
d297653d 957 *idx += 1;
07a51cd3 958 }
d342894c 959 }
960 }
3e61aa8f 961out:
d297653d 962 return err;
d342894c 963}
964
965/* Watch incoming packets to learn mapping between Ethernet address
966 * and Tunnel endpoint.
c4b49512 967 * Return true if packet is bogus and should be dropped.
d342894c 968 */
26a41ae6 969static bool vxlan_snoop(struct net_device *dev,
3ad7a4b1 970 union vxlan_addr *src_ip, const u8 *src_mac,
87613de9 971 u32 src_ifindex, __be32 vni)
d342894c 972{
973 struct vxlan_dev *vxlan = netdev_priv(dev);
974 struct vxlan_fdb *f;
87613de9
MS		 975 u32 ifindex = 0;
976
977#if IS_ENABLED(CONFIG_IPV6)
978 if (src_ip->sa.sa_family == AF_INET6 &&
979 (ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL))
980 ifindex = src_ifindex;
981#endif
d342894c 982
3ad7a4b1 983 f = vxlan_find_mac(vxlan, src_mac, vni);
d342894c 984 if (likely(f)) {
5ca5461c 985 struct vxlan_rdst *rdst = first_remote_rcu(f);
3e61aa8f 986
87613de9
MS		 987 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) &&
988 rdst->remote_ifindex == ifindex))
26a41ae6 989 return false;
990
991 /* Don't migrate static entries, drop packets */
e0090a9e 992 if (f->state & (NUD_PERMANENT | NUD_NOARP))
26a41ae6 993 return true;
d342894c 994
995 if (net_ratelimit())
996 netdev_info(dev,
e4c7ed41 997 "%pM migrated from %pIS to %pIS\n",
a4870f79 998 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
d342894c 999
e4c7ed41 1000 rdst->remote_ip = *src_ip;
d342894c 1001 f->updated = jiffies;
9e4b93f9 1002 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
d342894c 1003 } else {
1004 /* learned new entry */
1005 spin_lock(&vxlan->hash_lock);
3bf74b1a 1006
1007 /* close off race between vxlan_flush and incoming packets */
1008 if (netif_running(dev))
1009 vxlan_fdb_create(vxlan, src_mac, src_ip,
1010 NUD_REACHABLE,
1011 NLM_F_EXCL|NLM_F_CREATE,
0dfbdf41 1012 vxlan->cfg.dst_port,
3ad7a4b1 1013 vni,
3bf74b1a 1014 vxlan->default_dst.remote_vni,
87613de9 1015 ifindex, NTF_SELF);
d342894c 1016 spin_unlock(&vxlan->hash_lock);
1017 }
26a41ae6 1018
1019 return false;
d342894c 1020}
1021
d342894c 1022/* See if multicast group is already in use by other ID */
95ab0991 1023static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
d342894c 1024{
553675fb 1025 struct vxlan_dev *vxlan;
c6fcc4fc 1026 struct vxlan_sock *sock4;
4053ab1b
AB		 1027#if IS_ENABLED(CONFIG_IPV6)
1028 struct vxlan_sock *sock6;
1029#endif
b1be00a6 1030 unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
d342894c 1031
c6fcc4fc 1032 sock4 = rtnl_dereference(dev->vn4_sock);
1033
95ab0991
G		 1034 /* The vxlan_sock is only used by dev, leaving group has
1035 * no effect on other vxlan devices.
1036 */
66af846f 1037 if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1)
95ab0991 1038 return false;
b1be00a6 1039#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1040 sock6 = rtnl_dereference(dev->vn6_sock);
66af846f 1041 if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1)
b1be00a6
JB		 1042 return false;
1043#endif
95ab0991 1044
553675fb 1045 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
95ab0991 1046 if (!netif_running(vxlan->dev) || vxlan == dev)
553675fb 1047 continue;
d342894c 1048
c6fcc4fc 1049 if (family == AF_INET &&
1050 rtnl_dereference(vxlan->vn4_sock) != sock4)
95ab0991 1051 continue;
b1be00a6 1052#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1053 if (family == AF_INET6 &&
1054 rtnl_dereference(vxlan->vn6_sock) != sock6)
b1be00a6
JB		 1055 continue;
1056#endif
95ab0991
G		 1057
1058 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1059 &dev->default_dst.remote_ip))
1060 continue;
1061
1062 if (vxlan->default_dst.remote_ifindex !=
1063 dev->default_dst.remote_ifindex)
1064 continue;
1065
1066 return true;
553675fb 1067 }
d342894c 1068
1069 return false;
1070}
1071
544a773a 1072static bool __vxlan_sock_release_prep(struct vxlan_sock *vs)
7c47cedf 1073{
b1be00a6 1074 struct vxlan_net *vn;
012a5729 1075
b1be00a6 1076 if (!vs)
544a773a 1077 return false;
66af846f 1078 if (!refcount_dec_and_test(&vs->refcnt))
544a773a 1079 return false;
d342894c 1080
b1be00a6 1081 vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id);
1c51a915 1082 spin_lock(&vn->sock_lock);
7c47cedf 1083 hlist_del_rcu(&vs->hlist);
e7b3db5e 1084 udp_tunnel_notify_del_rx_port(vs->sock,
b9adcd69
AD		 1085 (vs->flags & VXLAN_F_GPE) ?
1086 UDP_TUNNEL_TYPE_VXLAN_GPE :
e7b3db5e 1087 UDP_TUNNEL_TYPE_VXLAN);
1c51a915
SH		 1088 spin_unlock(&vn->sock_lock);
1089
544a773a 1090 return true;
d342894c 1091}
1092
b1be00a6
JB		 1093static void vxlan_sock_release(struct vxlan_dev *vxlan)
1094{
c6fcc4fc 1095 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
b1be00a6 1096#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1097 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1098
57d88182 1099 RCU_INIT_POINTER(vxlan->vn6_sock, NULL);
544a773a
HFS		 1100#endif
1101
57d88182 1102 RCU_INIT_POINTER(vxlan->vn4_sock, NULL);
544a773a
HFS		 1103 synchronize_net();
1104
a53cb29b
MB		 1105 vxlan_vs_del_dev(vxlan);
1106
c6fcc4fc 1107 if (__vxlan_sock_release_prep(sock4)) {
1108 udp_tunnel_sock_release(sock4->sock);
1109 kfree(sock4);
544a773a
HFS		 1110 }
1111
1112#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1113 if (__vxlan_sock_release_prep(sock6)) {
1114 udp_tunnel_sock_release(sock6->sock);
1115 kfree(sock6);
544a773a 1116 }
b1be00a6
JB		 1117#endif
1118}
1119
56ef9c90 1120/* Update multicast group membership when first VNI on
c4b49512 1121 * multicast address is brought up
7c47cedf 1122 */
56ef9c90 1123static int vxlan_igmp_join(struct vxlan_dev *vxlan)
d342894c 1124{
b1be00a6 1125 struct sock *sk;
e4c7ed41
CW		 1126 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1127 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1128 int ret = -EINVAL;
d342894c 1129
e4c7ed41 1130 if (ip->sa.sa_family == AF_INET) {
c6fcc4fc 1131 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
e4c7ed41
CW		 1132 struct ip_mreqn mreq = {
1133 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1134 .imr_ifindex = ifindex,
1135 };
1136
c6fcc4fc 1137 sk = sock4->sock->sk;
b1be00a6 1138 lock_sock(sk);
56ef9c90 1139 ret = ip_mc_join_group(sk, &mreq);
b1be00a6 1140 release_sock(sk);
e4c7ed41
CW		 1141#if IS_ENABLED(CONFIG_IPV6)
1142 } else {
c6fcc4fc 1143 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1144
1145 sk = sock6->sock->sk;
b1be00a6 1146 lock_sock(sk);
56ef9c90
MRL		 1147 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1148 &ip->sin6.sin6_addr);
b1be00a6 1149 release_sock(sk);
e4c7ed41
CW		 1150#endif
1151 }
3fc2de2f 1152
56ef9c90 1153 return ret;
3fc2de2f 1154}
1155
1156/* Inverse of vxlan_igmp_join when last VNI is brought down */
56ef9c90 1157static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
3fc2de2f 1158{
b1be00a6 1159 struct sock *sk;
e4c7ed41
CW		 1160 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1161 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1162 int ret = -EINVAL;
3fc2de2f 1163
e4c7ed41 1164 if (ip->sa.sa_family == AF_INET) {
c6fcc4fc 1165 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
e4c7ed41
CW		 1166 struct ip_mreqn mreq = {
1167 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1168 .imr_ifindex = ifindex,
1169 };
1170
c6fcc4fc 1171 sk = sock4->sock->sk;
b1be00a6 1172 lock_sock(sk);
56ef9c90 1173 ret = ip_mc_leave_group(sk, &mreq);
b1be00a6 1174 release_sock(sk);
e4c7ed41
CW		 1175#if IS_ENABLED(CONFIG_IPV6)
1176 } else {
c6fcc4fc 1177 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1178
1179 sk = sock6->sock->sk;
b1be00a6 1180 lock_sock(sk);
56ef9c90
MRL		 1181 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1182 &ip->sin6.sin6_addr);
b1be00a6 1183 release_sock(sk);
e4c7ed41
CW		 1184#endif
1185 }
d342894c 1186
56ef9c90 1187 return ret;
d342894c 1188}
1189
f14ecebb
JB		 1190static bool vxlan_remcsum(struct vxlanhdr *unparsed,
1191 struct sk_buff *skb, u32 vxflags)
dfd8645e 1192{
7d34fa75 1193 size_t start, offset;
dfd8645e 1194
f14ecebb
JB		 1195 if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload)
1196 goto out;
b7fe10e5 1197
f14ecebb
JB		 1198 start = vxlan_rco_start(unparsed->vx_vni);
1199 offset = start + vxlan_rco_offset(unparsed->vx_vni);
dfd8645e 1200
7d34fa75 1201 if (!pskb_may_pull(skb, offset + sizeof(u16)))
be5cfeab 1202 return false;
dfd8645e 1203
be5cfeab
JB		 1204 skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset,
1205 !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL));
f14ecebb
JB		 1206out:
1207 unparsed->vx_flags &= ~VXLAN_HF_RCO;
1208 unparsed->vx_vni &= VXLAN_VNI_MASK;
be5cfeab 1209 return true;
dfd8645e
TH		 1210}
1211
f14ecebb 1212static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed,
64f87d36 1213 struct sk_buff *skb, u32 vxflags,
10a5af23 1214 struct vxlan_metadata *md)
3288af08 1215{
f14ecebb 1216 struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed;
10a5af23 1217 struct metadata_dst *tun_dst;
f14ecebb
JB		 1218
1219 if (!(unparsed->vx_flags & VXLAN_HF_GBP))
1220 goto out;
3288af08 1221
3288af08
JB		 1222 md->gbp = ntohs(gbp->policy_id);
1223
10a5af23 1224 tun_dst = (struct metadata_dst *)skb_dst(skb);
810813c4 1225 if (tun_dst) {
3288af08 1226 tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
810813c4
DM		 1227 tun_dst->u.tun_info.options_len = sizeof(*md);
1228 }
3288af08
JB		 1229 if (gbp->dont_learn)
1230 md->gbp |= VXLAN_GBP_DONT_LEARN;
1231
1232 if (gbp->policy_applied)
1233 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
f14ecebb 1234
64f87d36
JB		 1235 /* In flow-based mode, GBP is carried in dst_metadata */
1236 if (!(vxflags & VXLAN_F_COLLECT_METADATA))
1237 skb->mark = md->gbp;
f14ecebb
JB		 1238out:
1239 unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
3288af08
JB		 1240}
1241
e1e5314d 1242static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed,
61618eea 1243 __be16 *protocol,
e1e5314d
JB		 1244 struct sk_buff *skb, u32 vxflags)
1245{
1246 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed;
1247
1248 /* Need to have Next Protocol set for interfaces in GPE mode. */
1249 if (!gpe->np_applied)
1250 return false;
1251 /* "The initial version is 0. If a receiver does not support the
1252 * version indicated it MUST drop the packet.
1253 */
1254 if (gpe->version != 0)
1255 return false;
1256 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1257 * processing MUST occur." However, we don't implement OAM
1258 * processing, thus drop the packet.
1259 */
1260 if (gpe->oam_flag)
1261 return false;
1262
1263 switch (gpe->next_protocol) {
1264 case VXLAN_GPE_NP_IPV4:
1265 *protocol = htons(ETH_P_IP);
1266 break;
1267 case VXLAN_GPE_NP_IPV6:
1268 *protocol = htons(ETH_P_IPV6);
1269 break;
1270 case VXLAN_GPE_NP_ETHERNET:
1271 *protocol = htons(ETH_P_TEB);
1272 break;
1273 default:
1274 return false;
1275 }
1276
1277 unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS;
1278 return true;
1279}
1280
1ab016e2
JB		 1281static bool vxlan_set_mac(struct vxlan_dev *vxlan,
1282 struct vxlan_sock *vs,
3ad7a4b1 1283 struct sk_buff *skb, __be32 vni)
614732ea 1284{
614732ea 1285 union vxlan_addr saddr;
87613de9 1286 u32 ifindex = skb->dev->ifindex;
614732ea 1287
614732ea 1288 skb_reset_mac_header(skb);
614732ea
TG		 1289 skb->protocol = eth_type_trans(skb, vxlan->dev);
1290 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1291
1292 /* Ignore packet loops (and multicast echo) */
1293 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
1ab016e2 1294 return false;
614732ea 1295
760c6805 1296 /* Get address from the outer IP header */
ce212d0f 1297 if (vxlan_get_sk_family(vs) == AF_INET) {
1ab016e2 1298 saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
614732ea
TG		 1299 saddr.sa.sa_family = AF_INET;
1300#if IS_ENABLED(CONFIG_IPV6)
1301 } else {
1ab016e2 1302 saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
614732ea
TG		 1303 saddr.sa.sa_family = AF_INET6;
1304#endif
1305 }
1306
dc5321d7 1307 if ((vxlan->cfg.flags & VXLAN_F_LEARN) &&
87613de9 1308 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni))
1ab016e2
JB		 1309 return false;
1310
1311 return true;
1312}
1313
760c6805
JB		 1314static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph,
1315 struct sk_buff *skb)
1316{
1317 int err = 0;
1318
1319 if (vxlan_get_sk_family(vs) == AF_INET)
1320 err = IP_ECN_decapsulate(oiph, skb);
1321#if IS_ENABLED(CONFIG_IPV6)
1322 else
1323 err = IP6_ECN_decapsulate(oiph, skb);
1324#endif
1325
1326 if (unlikely(err) && log_ecn_error) {
1327 if (vxlan_get_sk_family(vs) == AF_INET)
1328 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1329 &((struct iphdr *)oiph)->saddr,
1330 ((struct iphdr *)oiph)->tos);
1331 else
1332 net_info_ratelimited("non-ECT from %pI6\n",
1333 &((struct ipv6hdr *)oiph)->saddr);
1334 }
1335 return err <= 1;
1336}
1337
d342894c 1338/* Callback from net/ipv4/udp.c to receive packets */
f2d1968e 1339static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
d342894c 1340{
f2d1968e 1341 struct pcpu_sw_netstats *stats;
c9e78efb 1342 struct vxlan_dev *vxlan;
5cfccc5a 1343 struct vxlan_sock *vs;
f14ecebb 1344 struct vxlanhdr unparsed;
ee122c79
TG		 1345 struct vxlan_metadata _md;
1346 struct vxlan_metadata *md = &_md;
61618eea 1347 __be16 protocol = htons(ETH_P_TEB);
e1e5314d 1348 bool raw_proto = false;
f2d1968e 1349 void *oiph;
3ad7a4b1 1350 __be32 vni = 0;
d342894c 1351
e1e5314d 1352 /* Need UDP and VXLAN header to be present */
7ce04758 1353 if (!pskb_may_pull(skb, VXLAN_HLEN))
e5aed006 1354 goto drop;
d342894c 1355
f14ecebb 1356 unparsed = *vxlan_hdr(skb);
288b01c8
JB		 1357 /* VNI flag always required to be set */
1358 if (!(unparsed.vx_flags & VXLAN_HF_VNI)) {
1359 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1360 ntohl(vxlan_hdr(skb)->vx_flags),
1361 ntohl(vxlan_hdr(skb)->vx_vni));
1362 /* Return non vxlan pkt */
e5aed006 1363 goto drop;
d342894c 1364 }
288b01c8
JB		 1365 unparsed.vx_flags &= ~VXLAN_HF_VNI;
1366 unparsed.vx_vni &= ~VXLAN_VNI_MASK;
d342894c 1367
559835ea 1368 vs = rcu_dereference_sk_user_data(sk);
5cfccc5a 1369 if (!vs)
d342894c 1370 goto drop;
d342894c 1371
3ad7a4b1
RP		 1372 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);
1373
49f810f0 1374 vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni);
c9e78efb
JB		 1375 if (!vxlan)
1376 goto drop;
1377
e1e5314d
JB		 1378 /* For backwards compatibility, only allow reserved fields to be
1379 * used by VXLAN extensions if explicitly requested.
1380 */
1381 if (vs->flags & VXLAN_F_GPE) {
1382 if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags))
1383 goto drop;
1384 raw_proto = true;
1385 }
1386
1387 if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto,
1388 !net_eq(vxlan->net, dev_net(vxlan->dev))))
1389 goto drop;
c9e78efb 1390
ee122c79 1391 if (vxlan_collect_metadata(vs)) {
10a5af23 1392 struct metadata_dst *tun_dst;
07dabf20 1393
c29a70d2 1394 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
d817f432 1395 key32_to_tunnel_id(vni), sizeof(*md));
c29a70d2 1396
ee122c79
TG		 1397 if (!tun_dst)
1398 goto drop;
1399
0f1b7354 1400 md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
10a5af23
JB		 1401
1402 skb_dst_set(skb, (struct dst_entry *)tun_dst);
ee122c79
TG		 1403 } else {
1404 memset(md, 0, sizeof(*md));
1405 }
1406
f14ecebb
JB		 1407 if (vs->flags & VXLAN_F_REMCSUM_RX)
1408 if (!vxlan_remcsum(&unparsed, skb, vs->flags))
1409 goto drop;
1410 if (vs->flags & VXLAN_F_GBP)
10a5af23 1411 vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md);
e1e5314d
JB		 1412 /* Note that GBP and GPE can never be active together. This is
1413 * ensured in vxlan_dev_configure.
1414 */
3511494c 1415
f14ecebb 1416 if (unparsed.vx_flags || unparsed.vx_vni) {
3bf39475
TH		 1417 /* If there are any unprocessed flags remaining treat
1418 * this as a malformed packet. This behavior diverges from
1419 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1420 * in reserved fields are to be ignored. The approach here
c4b49512 1421 * maintains compatibility with previous stack code, and also
3bf39475
TH		 1422 * is more robust and provides a little more security in
1423 * adding extensions to VXLAN.
1424 */
288b01c8 1425 goto drop;
3bf39475
TH		 1426 }
1427
e1e5314d 1428 if (!raw_proto) {
3ad7a4b1 1429 if (!vxlan_set_mac(vxlan, vs, skb, vni))
e1e5314d
JB		 1430 goto drop;
1431 } else {
8be0cfa4 1432 skb_reset_mac_header(skb);
e1e5314d
JB		 1433 skb->dev = vxlan->dev;
1434 skb->pkt_type = PACKET_HOST;
1435 }
f2d1968e 1436
f2d1968e
JB		 1437 oiph = skb_network_header(skb);
1438 skb_reset_network_header(skb);
1439
1440 if (!vxlan_ecn_decapsulate(vs, oiph, skb)) {
1441 ++vxlan->dev->stats.rx_frame_errors;
1442 ++vxlan->dev->stats.rx_errors;
1443 goto drop;
1444 }
1445
1446 stats = this_cpu_ptr(vxlan->dev->tstats);
1447 u64_stats_update_begin(&stats->syncp);
1448 stats->rx_packets++;
1449 stats->rx_bytes += skb->len;
1450 u64_stats_update_end(&stats->syncp);
1451
1452 gro_cells_receive(&vxlan->gro_cells, skb);
5cfccc5a
PS		 1453 return 0;
1454
1455drop:
288b01c8
JB		 1456 /* Consume bad packet */
1457 kfree_skb(skb);
1458 return 0;
5cfccc5a
PS		 1459}
1460
3ad7a4b1 1461static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
e4f67add
DS		 1462{
1463 struct vxlan_dev *vxlan = netdev_priv(dev);
1464 struct arphdr *parp;
1465 u8 *arpptr, *sha;
1466 __be32 sip, tip;
1467 struct neighbour *n;
1468
1469 if (dev->flags & IFF_NOARP)
1470 goto out;
1471
1472 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1473 dev->stats.tx_dropped++;
1474 goto out;
1475 }
1476 parp = arp_hdr(skb);
1477
1478 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1479 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1480 parp->ar_pro != htons(ETH_P_IP) ||
1481 parp->ar_op != htons(ARPOP_REQUEST) ||
1482 parp->ar_hln != dev->addr_len ||
1483 parp->ar_pln != 4)
1484 goto out;
1485 arpptr = (u8 *)parp + sizeof(struct arphdr);
1486 sha = arpptr;
1487 arpptr += dev->addr_len; /* sha */
1488 memcpy(&sip, arpptr, sizeof(sip));
1489 arpptr += sizeof(sip);
1490 arpptr += dev->addr_len; /* tha */
1491 memcpy(&tip, arpptr, sizeof(tip));
1492
1493 if (ipv4_is_loopback(tip) ||
1494 ipv4_is_multicast(tip))
1495 goto out;
1496
1497 n = neigh_lookup(&arp_tbl, &tip, dev);
1498
1499 if (n) {
e4f67add
DS		 1500 struct vxlan_fdb *f;
1501 struct sk_buff *reply;
1502
1503 if (!(n->nud_state & NUD_CONNECTED)) {
1504 neigh_release(n);
1505 goto out;
1506 }
1507
3ad7a4b1 1508 f = vxlan_find_mac(vxlan, n->ha, vni);
e4c7ed41 1509 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
e4f67add
DS		 1510 /* bridge-local neighbor */
1511 neigh_release(n);
1512 goto out;
1513 }
1514
1515 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1516 n->ha, sha);
1517
1518 neigh_release(n);
1519
7346135d
DS		 1520 if (reply == NULL)
1521 goto out;
1522
e4f67add
DS		 1523 skb_reset_mac_header(reply);
1524 __skb_pull(reply, skb_network_offset(reply));
1525 reply->ip_summed = CHECKSUM_UNNECESSARY;
1526 reply->pkt_type = PACKET_HOST;
1527
1528 if (netif_rx_ni(reply) == NET_RX_DROP)
1529 dev->stats.rx_dropped++;
dc5321d7 1530 } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) {
e4c7ed41
CW		 1531 union vxlan_addr ipa = {
1532 .sin.sin_addr.s_addr = tip,
a45e92a5 1533 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1534 };
1535
1536 vxlan_ip_miss(dev, &ipa);
1537 }
e4f67add
DS		 1538out:
1539 consume_skb(skb);
1540 return NETDEV_TX_OK;
1541}
1542
f564f45c 1543#if IS_ENABLED(CONFIG_IPV6)
4b29dba9
DS		 1544static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1545 struct neighbour *n, bool isrouter)
1546{
1547 struct net_device *dev = request->dev;
1548 struct sk_buff *reply;
1549 struct nd_msg *ns, *na;
1550 struct ipv6hdr *pip6;
1551 u8 *daddr;
1552 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1553 int ns_olen;
1554 int i, len;
1555
f1fb08f6 1556 if (dev == NULL || !pskb_may_pull(request, request->len))
4b29dba9
DS		 1557 return NULL;
1558
1559 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1560 sizeof(*na) + na_olen + dev->needed_tailroom;
1561 reply = alloc_skb(len, GFP_ATOMIC);
1562 if (reply == NULL)
1563 return NULL;
1564
1565 reply->protocol = htons(ETH_P_IPV6);
1566 reply->dev = dev;
1567 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1568 skb_push(reply, sizeof(struct ethhdr));
6297b91c 1569 skb_reset_mac_header(reply);
4b29dba9 1570
f1fb08f6 1571 ns = (struct nd_msg *)(ipv6_hdr(request) + 1);
4b29dba9
DS		 1572
1573 daddr = eth_hdr(request)->h_source;
f1fb08f6
VB		 1574 ns_olen = request->len - skb_network_offset(request) -
1575 sizeof(struct ipv6hdr) - sizeof(*ns);
4b29dba9
DS		 1576 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1577 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1578 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1579 break;
1580 }
1581 }
1582
1583 /* Ethernet header */
1584 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1585 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1586 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1587 reply->protocol = htons(ETH_P_IPV6);
1588
1589 skb_pull(reply, sizeof(struct ethhdr));
6297b91c 1590 skb_reset_network_header(reply);
4b29dba9
DS		 1591 skb_put(reply, sizeof(struct ipv6hdr));
1592
1593 /* IPv6 header */
1594
1595 pip6 = ipv6_hdr(reply);
1596 memset(pip6, 0, sizeof(struct ipv6hdr));
1597 pip6->version = 6;
1598 pip6->priority = ipv6_hdr(request)->priority;
1599 pip6->nexthdr = IPPROTO_ICMPV6;
1600 pip6->hop_limit = 255;
1601 pip6->daddr = ipv6_hdr(request)->saddr;
1602 pip6->saddr = *(struct in6_addr *)n->primary_key;
1603
1604 skb_pull(reply, sizeof(struct ipv6hdr));
6297b91c 1605 skb_reset_transport_header(reply);
4b29dba9 1606
4b29dba9 1607 /* Neighbor Advertisement */
b080db58 1608 na = skb_put_zero(reply, sizeof(*na) + na_olen);
4b29dba9
DS		 1609 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1610 na->icmph.icmp6_router = isrouter;
1611 na->icmph.icmp6_override = 1;
1612 na->icmph.icmp6_solicited = 1;
1613 na->target = ns->target;
1614 ether_addr_copy(&na->opt[2], n->ha);
1615 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1616 na->opt[1] = na_olen >> 3;
1617
1618 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1619 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1620 csum_partial(na, sizeof(*na)+na_olen, 0));
1621
1622 pip6->payload_len = htons(sizeof(*na)+na_olen);
1623
1624 skb_push(reply, sizeof(struct ipv6hdr));
1625
1626 reply->ip_summed = CHECKSUM_UNNECESSARY;
1627
1628 return reply;
1629}
1630
3ad7a4b1 1631static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
f564f45c
CW		 1632{
1633 struct vxlan_dev *vxlan = netdev_priv(dev);
4b29dba9 1634 struct nd_msg *msg;
f564f45c 1635 const struct ipv6hdr *iphdr;
8dcd81a9 1636 const struct in6_addr *daddr;
4b29dba9
DS		 1637 struct neighbour *n;
1638 struct inet6_dev *in6_dev;
f564f45c
CW		 1639
1640 in6_dev = __in6_dev_get(dev);
1641 if (!in6_dev)
1642 goto out;
1643
f1fb08f6
VB		 1644 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + sizeof(struct nd_msg)))
1645 goto out;
1646
f564f45c 1647 iphdr = ipv6_hdr(skb);
f564f45c
CW		 1648 daddr = &iphdr->daddr;
1649
f1fb08f6 1650 msg = (struct nd_msg *)(iphdr + 1);
f564f45c
CW		 1651 if (msg->icmph.icmp6_code != 0 ||
1652 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1653 goto out;
1654
4b29dba9
DS		 1655 if (ipv6_addr_loopback(daddr) ||
1656 ipv6_addr_is_multicast(&msg->target))
1657 goto out;
1658
1659 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
f564f45c
CW		 1660
1661 if (n) {
1662 struct vxlan_fdb *f;
4b29dba9 1663 struct sk_buff *reply;
f564f45c
CW		 1664
1665 if (!(n->nud_state & NUD_CONNECTED)) {
1666 neigh_release(n);
1667 goto out;
1668 }
1669
3ad7a4b1 1670 f = vxlan_find_mac(vxlan, n->ha, vni);
f564f45c
CW		 1671 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1672 /* bridge-local neighbor */
1673 neigh_release(n);
1674 goto out;
1675 }
1676
4b29dba9
DS		 1677 reply = vxlan_na_create(skb, n,
1678 !!(f ? f->flags & NTF_ROUTER : 0));
1679
f564f45c 1680 neigh_release(n);
4b29dba9
DS		 1681
1682 if (reply == NULL)
1683 goto out;
1684
1685 if (netif_rx_ni(reply) == NET_RX_DROP)
1686 dev->stats.rx_dropped++;
1687
dc5321d7 1688 } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) {
4b29dba9
DS		 1689 union vxlan_addr ipa = {
1690 .sin6.sin6_addr = msg->target,
a45e92a5 1691 .sin6.sin6_family = AF_INET6,
4b29dba9
DS		 1692 };
1693
f564f45c
CW		 1694 vxlan_ip_miss(dev, &ipa);
1695 }
1696
1697out:
1698 consume_skb(skb);
1699 return NETDEV_TX_OK;
1700}
1701#endif
1702
e4f67add
DS		 1703static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1704{
1705 struct vxlan_dev *vxlan = netdev_priv(dev);
1706 struct neighbour *n;
e4f67add
DS		 1707
1708 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1709 return false;
1710
1711 n = NULL;
1712 switch (ntohs(eth_hdr(skb)->h_proto)) {
1713 case ETH_P_IP:
e15a00aa
CW		 1714 {
1715 struct iphdr *pip;
1716
e4f67add
DS		 1717 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1718 return false;
1719 pip = ip_hdr(skb);
1720 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
dc5321d7 1721 if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) {
e4c7ed41
CW		 1722 union vxlan_addr ipa = {
1723 .sin.sin_addr.s_addr = pip->daddr,
a45e92a5 1724 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1725 };
1726
1727 vxlan_ip_miss(dev, &ipa);
1728 return false;
1729 }
1730
e4f67add 1731 break;
e15a00aa
CW		 1732 }
1733#if IS_ENABLED(CONFIG_IPV6)
1734 case ETH_P_IPV6:
1735 {
1736 struct ipv6hdr *pip6;
1737
1738 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1739 return false;
1740 pip6 = ipv6_hdr(skb);
1741 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
dc5321d7 1742 if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) {
e15a00aa
CW		 1743 union vxlan_addr ipa = {
1744 .sin6.sin6_addr = pip6->daddr,
a45e92a5 1745 .sin6.sin6_family = AF_INET6,
e15a00aa
CW		 1746 };
1747
1748 vxlan_ip_miss(dev, &ipa);
1749 return false;
1750 }
1751
1752 break;
1753 }
1754#endif
e4f67add
DS		 1755 default:
1756 return false;
1757 }
1758
1759 if (n) {
1760 bool diff;
1761
7367d0b5 1762 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
e4f67add
DS		 1763 if (diff) {
1764 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1765 dev->addr_len);
1766 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1767 }
1768 neigh_release(n);
1769 return diff;
e4c7ed41
CW		 1770 }
1771
e4f67add
DS		 1772 return false;
1773}
1774
af33c1ad 1775static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
3511494c
TG		 1776 struct vxlan_metadata *md)
1777{
1778 struct vxlanhdr_gbp *gbp;
1779
db79a621
TG		 1780 if (!md->gbp)
1781 return;
1782
3511494c 1783 gbp = (struct vxlanhdr_gbp *)vxh;
54bfd872 1784 vxh->vx_flags |= VXLAN_HF_GBP;
3511494c
TG		 1785
1786 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1787 gbp->dont_learn = 1;
1788
1789 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1790 gbp->policy_applied = 1;
1791
1792 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1793}
1794
e1e5314d
JB		 1795static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags,
1796 __be16 protocol)
1797{
1798 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh;
1799
1800 gpe->np_applied = 1;
1801
1802 switch (protocol) {
1803 case htons(ETH_P_IP):
1804 gpe->next_protocol = VXLAN_GPE_NP_IPV4;
1805 return 0;
1806 case htons(ETH_P_IPV6):
1807 gpe->next_protocol = VXLAN_GPE_NP_IPV6;
1808 return 0;
1809 case htons(ETH_P_TEB):
1810 gpe->next_protocol = VXLAN_GPE_NP_ETHERNET;
1811 return 0;
1812 }
1813 return -EPFNOSUPPORT;
1814}
1815
f491e56d
JB		 1816static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
1817 int iphdr_len, __be32 vni,
1818 struct vxlan_metadata *md, u32 vxflags,
b4ed5cad 1819 bool udp_sum)
e4c7ed41 1820{
e4c7ed41 1821 struct vxlanhdr *vxh;
e4c7ed41
CW		 1822 int min_headroom;
1823 int err;
dfd8645e 1824 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
e1e5314d 1825 __be16 inner_protocol = htons(ETH_P_TEB);
dfd8645e 1826
af33c1ad 1827 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1828 skb->ip_summed == CHECKSUM_PARTIAL) {
1829 int csum_start = skb_checksum_start_offset(skb);
1830
1831 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1832 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1833 (skb->csum_offset == offsetof(struct udphdr, check) ||
b5708501 1834 skb->csum_offset == offsetof(struct tcphdr, check)))
dfd8645e 1835 type |= SKB_GSO_TUNNEL_REMCSUM;
dfd8645e 1836 }
e4c7ed41 1837
e4c7ed41 1838 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
4a4f86cc 1839 + VXLAN_HLEN + iphdr_len;
649c5b8b
PS		 1840
1841 /* Need space for new headers (invalidates iph ptr) */
1842 err = skb_cow_head(skb, min_headroom);
e1e5314d 1843 if (unlikely(err))
c46b7897 1844 return err;
649c5b8b 1845
aed069df
AD		 1846 err = iptunnel_handle_offloads(skb, type);
1847 if (err)
c46b7897 1848 return err;
b736a623 1849
d58ff351 1850 vxh = __skb_push(skb, sizeof(*vxh));
54bfd872
JB		 1851 vxh->vx_flags = VXLAN_HF_VNI;
1852 vxh->vx_vni = vxlan_vni_field(vni);
49560532 1853
dfd8645e 1854 if (type & SKB_GSO_TUNNEL_REMCSUM) {
54bfd872 1855 unsigned int start;
dfd8645e 1856
54bfd872
JB		 1857 start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr);
1858 vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset);
1859 vxh->vx_flags |= VXLAN_HF_RCO;
dfd8645e
TH		 1860
1861 if (!skb_is_gso(skb)) {
1862 skb->ip_summed = CHECKSUM_NONE;
1863 skb->encapsulation = 0;
1864 }
1865 }
1866
af33c1ad
TH		 1867 if (vxflags & VXLAN_F_GBP)
1868 vxlan_build_gbp_hdr(vxh, vxflags, md);
e1e5314d
JB		 1869 if (vxflags & VXLAN_F_GPE) {
1870 err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol);
1871 if (err < 0)
c46b7897 1872 return err;
e1e5314d
JB		 1873 inner_protocol = skb->protocol;
1874 }
3511494c 1875
e1e5314d 1876 skb_set_inner_protocol(skb, inner_protocol);
039f5062 1877 return 0;
49560532 1878}
49560532 1879
655c3de1 1880static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev,
1881 struct vxlan_sock *sock4,
1a8496ba 1882 struct sk_buff *skb, int oif, u8 tos,
4ecb1d83 1883 __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport,
0c1d70af 1884 struct dst_cache *dst_cache,
db3c6139 1885 const struct ip_tunnel_info *info)
1a8496ba 1886{
db3c6139 1887 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
1a8496ba
JB		 1888 struct rtable *rt = NULL;
1889 struct flowi4 fl4;
1890
655c3de1 1891 if (!sock4)
1892 return ERR_PTR(-EIO);
1893
db3c6139
DB		 1894 if (tos && !info)
1895 use_cache = false;
1896 if (use_cache) {
0c1d70af
PA		 1897 rt = dst_cache_get_ip4(dst_cache, saddr);
1898 if (rt)
1899 return rt;
1900 }
1901
1a8496ba
JB		 1902 memset(&fl4, 0, sizeof(fl4));
1903 fl4.flowi4_oif = oif;
1904 fl4.flowi4_tos = RT_TOS(tos);
1905 fl4.flowi4_mark = skb->mark;
1906 fl4.flowi4_proto = IPPROTO_UDP;
1907 fl4.daddr = daddr;
272d96a5 1908 fl4.saddr = *saddr;
4ecb1d83
MP		 1909 fl4.fl4_dport = dport;
1910 fl4.fl4_sport = sport;
1a8496ba
JB		 1911
1912 rt = ip_route_output_key(vxlan->net, &fl4);
655c3de1 1913 if (likely(!IS_ERR(rt))) {
1914 if (rt->dst.dev == dev) {
1915 netdev_dbg(dev, "circular route to %pI4\n", &daddr);
1916 ip_rt_put(rt);
1917 return ERR_PTR(-ELOOP);
1918 }
1919
1a8496ba 1920 *saddr = fl4.saddr;
0c1d70af
PA		 1921 if (use_cache)
1922 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
655c3de1 1923 } else {
1924 netdev_dbg(dev, "no route to %pI4\n", &daddr);
1925 return ERR_PTR(-ENETUNREACH);
0c1d70af 1926 }
1a8496ba
JB		 1927 return rt;
1928}
1929
e5d4b29f
JB		 1930#if IS_ENABLED(CONFIG_IPV6)
1931static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
655c3de1 1932 struct net_device *dev,
03dc52a8 1933 struct vxlan_sock *sock6,
1400615d 1934 struct sk_buff *skb, int oif, u8 tos,
e7f70af1 1935 __be32 label,
e5d4b29f 1936 const struct in6_addr *daddr,
0c1d70af 1937 struct in6_addr *saddr,
4ecb1d83 1938 __be16 dport, __be16 sport,
db3c6139
DB		 1939 struct dst_cache *dst_cache,
1940 const struct ip_tunnel_info *info)
e5d4b29f 1941{
db3c6139 1942 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
e5d4b29f
JB		 1943 struct dst_entry *ndst;
1944 struct flowi6 fl6;
1945 int err;
1946
c6fcc4fc 1947 if (!sock6)
1948 return ERR_PTR(-EIO);
1949
1400615d
DB		 1950 if (tos && !info)
1951 use_cache = false;
db3c6139 1952 if (use_cache) {
0c1d70af
PA		 1953 ndst = dst_cache_get_ip6(dst_cache, saddr);
1954 if (ndst)
1955 return ndst;
1956 }
1957
e5d4b29f
JB		 1958 memset(&fl6, 0, sizeof(fl6));
1959 fl6.flowi6_oif = oif;
1960 fl6.daddr = *daddr;
272d96a5 1961 fl6.saddr = *saddr;
eaa93bf4 1962 fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label);
e5d4b29f
JB		 1963 fl6.flowi6_mark = skb->mark;
1964 fl6.flowi6_proto = IPPROTO_UDP;
4ecb1d83
MP		 1965 fl6.fl6_dport = dport;
1966 fl6.fl6_sport = sport;
e5d4b29f
JB		 1967
1968 err = ipv6_stub->ipv6_dst_lookup(vxlan->net,
c6fcc4fc 1969 sock6->sock->sk,
e5d4b29f 1970 &ndst, &fl6);
655c3de1 1971 if (unlikely(err < 0)) {
1972 netdev_dbg(dev, "no route to %pI6\n", daddr);
1973 return ERR_PTR(-ENETUNREACH);
1974 }
1975
1976 if (unlikely(ndst->dev == dev)) {
1977 netdev_dbg(dev, "circular route to %pI6\n", daddr);
1978 dst_release(ndst);
1979 return ERR_PTR(-ELOOP);
1980 }
e5d4b29f
JB		 1981
1982 *saddr = fl6.saddr;
db3c6139 1983 if (use_cache)
0c1d70af 1984 dst_cache_set_ip6(dst_cache, ndst, saddr);
e5d4b29f
JB		 1985 return ndst;
1986}
1987#endif
1988
9dcc71e1
SS		 1989/* Bypass encapsulation if the destination is local */
1990static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
3ad7a4b1 1991 struct vxlan_dev *dst_vxlan, __be32 vni)
9dcc71e1 1992{
8f84985f 1993 struct pcpu_sw_netstats *tx_stats, *rx_stats;
e4c7ed41
CW		 1994 union vxlan_addr loopback;
1995 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
ce6502a8
LR		 1996 struct net_device *dev = skb->dev;
1997 int len = skb->len;
9dcc71e1 1998
8f84985f
LR		 1999 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
2000 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
9dcc71e1
SS		 2001 skb->pkt_type = PACKET_HOST;
2002 skb->encapsulation = 0;
2003 skb->dev = dst_vxlan->dev;
2004 __skb_pull(skb, skb_network_offset(skb));
2005
e4c7ed41
CW		 2006 if (remote_ip->sa.sa_family == AF_INET) {
2007 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2008 loopback.sa.sa_family = AF_INET;
2009#if IS_ENABLED(CONFIG_IPV6)
2010 } else {
2011 loopback.sin6.sin6_addr = in6addr_loopback;
2012 loopback.sa.sa_family = AF_INET6;
2013#endif
2014 }
2015
dc5321d7 2016 if (dst_vxlan->cfg.flags & VXLAN_F_LEARN)
87613de9
MS		 2017 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source, 0,
2018 vni);
9dcc71e1
SS		 2019
2020 u64_stats_update_begin(&tx_stats->syncp);
2021 tx_stats->tx_packets++;
ce6502a8 2022 tx_stats->tx_bytes += len;
9dcc71e1
SS		 2023 u64_stats_update_end(&tx_stats->syncp);
2024
2025 if (netif_rx(skb) == NET_RX_SUCCESS) {
2026 u64_stats_update_begin(&rx_stats->syncp);
2027 rx_stats->rx_packets++;
ce6502a8 2028 rx_stats->rx_bytes += len;
9dcc71e1
SS		 2029 u64_stats_update_end(&rx_stats->syncp);
2030 } else {
ce6502a8 2031 dev->stats.rx_dropped++;
9dcc71e1
SS		 2032 }
2033}
2034
fee1fad7 2035static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev,
49f810f0
MS		 2036 struct vxlan_dev *vxlan,
2037 union vxlan_addr *daddr,
2038 __be16 dst_port, int dst_ifindex, __be32 vni,
2039 struct dst_entry *dst,
fee1fad7 2040 u32 rt_flags)
2041{
2042#if IS_ENABLED(CONFIG_IPV6)
2043 /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of
2044 * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple
2045 * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry.
2046 */
2047 BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL);
2048#endif
2049 /* Bypass encapsulation if the destination is local */
2050 if (rt_flags & RTCF_LOCAL &&
2051 !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
2052 struct vxlan_dev *dst_vxlan;
2053
2054 dst_release(dst);
49f810f0 2055 dst_vxlan = vxlan_find_vni(vxlan->net, dst_ifindex, vni,
fee1fad7 2056 daddr->sa.sa_family, dst_port,
dc5321d7 2057 vxlan->cfg.flags);
fee1fad7 2058 if (!dst_vxlan) {
2059 dev->stats.tx_errors++;
2060 kfree_skb(skb);
2061
2062 return -ENOENT;
2063 }
3ad7a4b1 2064 vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni);
fee1fad7 2065 return 1;
2066 }
2067
2068 return 0;
2069}
2070
4ad16930 2071static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
3ad7a4b1
RP		 2072 __be32 default_vni, struct vxlan_rdst *rdst,
2073 bool did_rsc)
d342894c 2074{
d71785ff 2075 struct dst_cache *dst_cache;
3093fbe7 2076 struct ip_tunnel_info *info;
d342894c 2077 struct vxlan_dev *vxlan = netdev_priv(dev);
0770b53b 2078 const struct iphdr *old_iph = ip_hdr(skb);
e4c7ed41 2079 union vxlan_addr *dst;
272d96a5 2080 union vxlan_addr remote_ip, local_ip;
ee122c79
TG		 2081 struct vxlan_metadata _md;
2082 struct vxlan_metadata *md = &_md;
e4c7ed41 2083 __be16 src_port = 0, dst_port;
655c3de1 2084 struct dst_entry *ndst = NULL;
e7f70af1 2085 __be32 vni, label;
d342894c 2086 __u8 tos, ttl;
49f810f0 2087 int ifindex;
0e6fbc5b 2088 int err;
dc5321d7 2089 u32 flags = vxlan->cfg.flags;
b4ed5cad 2090 bool udp_sum = false;
f491e56d 2091 bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
d342894c 2092
61adedf3 2093 info = skb_tunnel_info(skb);
3093fbe7 2094
ee122c79 2095 if (rdst) {
0770b53b 2096 dst = &rdst->remote_ip;
2097 if (vxlan_addr_any(dst)) {
2098 if (did_rsc) {
2099 /* short-circuited back to local bridge */
3ad7a4b1 2100 vxlan_encap_bypass(skb, vxlan, vxlan, default_vni);
0770b53b 2101 return;
2102 }
2103 goto drop;
2104 }
2105
0dfbdf41 2106 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
3ad7a4b1 2107 vni = (rdst->remote_vni) ? : default_vni;
49f810f0 2108 ifindex = rdst->remote_ifindex;
1158632b 2109 local_ip = vxlan->cfg.saddr;
d71785ff 2110 dst_cache = &rdst->dst_cache;
0770b53b 2111 md->gbp = skb->mark;
2112 ttl = vxlan->cfg.ttl;
2113 if (!ttl && vxlan_addr_multicast(dst))
2114 ttl = 1;
2115
2116 tos = vxlan->cfg.tos;
2117 if (tos == 1)
2118 tos = ip_tunnel_get_dsfield(old_iph, skb);
2119
2120 if (dst->sa.sa_family == AF_INET)
2121 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
2122 else
2123 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
2124 label = vxlan->cfg.label;
ee122c79
TG		 2125 } else {
2126 if (!info) {
2127 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
2128 dev->name);
2129 goto drop;
2130 }
b1be00a6 2131 remote_ip.sa.sa_family = ip_tunnel_info_af(info);
272d96a5 2132 if (remote_ip.sa.sa_family == AF_INET) {
a725e514 2133 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
272d96a5 2134 local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src;
2135 } else {
a725e514 2136 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
272d96a5 2137 local_ip.sin6.sin6_addr = info->key.u.ipv6.src;
2138 }
ee122c79 2139 dst = &remote_ip;
0770b53b 2140 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
2141 vni = tunnel_id_to_key32(info->key.tun_id);
49f810f0 2142 ifindex = 0;
d71785ff 2143 dst_cache = &info->dst_cache;
0770b53b 2144 if (info->options_len)
2145 md = ip_tunnel_info_opts(info);
a725e514
JB		 2146 ttl = info->key.ttl;
2147 tos = info->key.tos;
e7f70af1 2148 label = info->key.label;
b4ed5cad 2149 udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
a725e514 2150 }
0770b53b 2151 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2152 vxlan->cfg.port_max, true);
a725e514 2153
56de859e 2154 rcu_read_lock();
e4c7ed41 2155 if (dst->sa.sa_family == AF_INET) {
c6fcc4fc 2156 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
c46b7897 2157 struct rtable *rt;
0770b53b 2158 __be16 df = 0;
c6fcc4fc 2159
49f810f0 2160 rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos,
272d96a5 2161 dst->sin.sin_addr.s_addr,
1158632b 2162 &local_ip.sin.sin_addr.s_addr,
4ecb1d83 2163 dst_port, src_port,
d71785ff 2164 dst_cache, info);
8ebd115b
DM		 2165 if (IS_ERR(rt)) {
2166 err = PTR_ERR(rt);
c46b7897 2167 goto tx_error;
8ebd115b 2168 }
e4c7ed41
CW		 2169
2170 /* Bypass encapsulation if the destination is local */
fee1fad7 2171 if (!info) {
2172 err = encap_bypass_if_local(skb, dev, vxlan, dst,
49f810f0
MS		 2173 dst_port, ifindex, vni,
2174 &rt->dst, rt->rt_flags);
fee1fad7 2175 if (err)
56de859e 2176 goto out_unlock;
fee1fad7 2177 } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) {
6ceb31ca 2178 df = htons(IP_DF);
fee1fad7 2179 }
6ceb31ca 2180
c46b7897 2181 ndst = &rt->dst;
e4c7ed41
CW		 2182 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2183 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
c46b7897 2184 err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr),
54bfd872 2185 vni, md, flags, udp_sum);
f491e56d 2186 if (err < 0)
c46b7897 2187 goto tx_error;
f491e56d 2188
1158632b 2189 udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr,
f491e56d
JB		 2190 dst->sin.sin_addr.s_addr, tos, ttl, df,
2191 src_port, dst_port, xnet, !udp_sum);
e4c7ed41
CW		 2192#if IS_ENABLED(CONFIG_IPV6)
2193 } else {
c6fcc4fc 2194 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
e4c7ed41 2195
49f810f0 2196 ndst = vxlan6_get_route(vxlan, dev, sock6, skb, ifindex, tos,
272d96a5 2197 label, &dst->sin6.sin6_addr,
1158632b 2198 &local_ip.sin6.sin6_addr,
4ecb1d83 2199 dst_port, src_port,
db3c6139 2200 dst_cache, info);
e5d4b29f 2201 if (IS_ERR(ndst)) {
8ebd115b 2202 err = PTR_ERR(ndst);
c46b7897 2203 ndst = NULL;
9dcc71e1 2204 goto tx_error;
e4c7ed41 2205 }
655c3de1 2206
fee1fad7 2207 if (!info) {
2208 u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
49560532 2209
fee1fad7 2210 err = encap_bypass_if_local(skb, dev, vxlan, dst,
49f810f0
MS		 2211 dst_port, ifindex, vni,
2212 ndst, rt6i_flags);
fee1fad7 2213 if (err)
56de859e 2214 goto out_unlock;
fee1fad7 2215 }
35e2d115 2216
1400615d 2217 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
e4c7ed41 2218 ttl = ttl ? : ip6_dst_hoplimit(ndst);
f491e56d
JB		 2219 skb_scrub_packet(skb, xnet);
2220 err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
54bfd872 2221 vni, md, flags, udp_sum);
c46b7897 2222 if (err < 0)
2223 goto tx_error;
2224
0770b53b 2225 udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev,
1158632b 2226 &local_ip.sin6.sin6_addr,
272d96a5 2227 &dst->sin6.sin6_addr, tos, ttl,
e7f70af1 2228 label, src_port, dst_port, !udp_sum);
e4c7ed41
CW		 2229#endif
2230 }
56de859e
JK		 2231out_unlock:
2232 rcu_read_unlock();
4ad16930 2233 return;
d342894c 2234
2235drop:
2236 dev->stats.tx_dropped++;
c46b7897 2237 dev_kfree_skb(skb);
2238 return;
d342894c 2239
2240tx_error:
56de859e 2241 rcu_read_unlock();
655c3de1 2242 if (err == -ELOOP)
2243 dev->stats.collisions++;
2244 else if (err == -ENETUNREACH)
2245 dev->stats.tx_carrier_errors++;
c46b7897 2246 dst_release(ndst);
d342894c 2247 dev->stats.tx_errors++;
c46b7897 2248 kfree_skb(skb);
d342894c 2249}
2250
6681712d
DS		 2251/* Transmit local packets over Vxlan
2252 *
2253 * Outer IP header inherits ECN and DF from inner header.
2254 * Outer UDP destination is the VXLAN assigned port.
2255 * source port is based on hash of flow
2256 */
2257static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2258{
2259 struct vxlan_dev *vxlan = netdev_priv(dev);
3093fbe7 2260 const struct ip_tunnel_info *info;
6681712d
DS		 2261 struct ethhdr *eth;
2262 bool did_rsc = false;
8f646c92 2263 struct vxlan_rdst *rdst, *fdst = NULL;
6681712d 2264 struct vxlan_fdb *f;
3ad7a4b1 2265 __be32 vni = 0;
6681712d 2266
61adedf3 2267 info = skb_tunnel_info(skb);
3093fbe7 2268
6681712d 2269 skb_reset_mac_header(skb);
6681712d 2270
dc5321d7 2271 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) {
3ad7a4b1
RP		 2272 if (info && info->mode & IP_TUNNEL_INFO_BRIDGE &&
2273 info->mode & IP_TUNNEL_INFO_TX) {
2274 vni = tunnel_id_to_key32(info->key.tun_id);
2275 } else {
2276 if (info && info->mode & IP_TUNNEL_INFO_TX)
2277 vxlan_xmit_one(skb, dev, vni, NULL, false);
2278 else
2279 kfree_skb(skb);
2280 return NETDEV_TX_OK;
2281 }
47e5d1b0
JB		 2282 }
2283
dc5321d7 2284 if (vxlan->cfg.flags & VXLAN_F_PROXY) {
47e5d1b0 2285 eth = eth_hdr(skb);
f564f45c 2286 if (ntohs(eth->h_proto) == ETH_P_ARP)
3ad7a4b1 2287 return arp_reduce(dev, skb, vni);
f564f45c 2288#if IS_ENABLED(CONFIG_IPV6)
f1fb08f6
VB		 2289 else if (ntohs(eth->h_proto) == ETH_P_IPV6) {
2290 struct ipv6hdr *hdr, _hdr;
2291 if ((hdr = skb_header_pointer(skb,
2292 skb_network_offset(skb),
2293 sizeof(_hdr), &_hdr)) &&
2294 hdr->nexthdr == IPPROTO_ICMPV6)
2295 return neigh_reduce(dev, skb, vni);
f564f45c
CW		 2296 }
2297#endif
2298 }
6681712d 2299
47e5d1b0 2300 eth = eth_hdr(skb);
3ad7a4b1 2301 f = vxlan_find_mac(vxlan, eth->h_dest, vni);
ae884082
DS		 2302 did_rsc = false;
2303
dc5321d7 2304 if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) &&
e15a00aa
CW		 2305 (ntohs(eth->h_proto) == ETH_P_IP ||
2306 ntohs(eth->h_proto) == ETH_P_IPV6)) {
ae884082
DS		 2307 did_rsc = route_shortcircuit(dev, skb);
2308 if (did_rsc)
3ad7a4b1 2309 f = vxlan_find_mac(vxlan, eth->h_dest, vni);
ae884082
DS		 2310 }
2311
6681712d 2312 if (f == NULL) {
3ad7a4b1 2313 f = vxlan_find_mac(vxlan, all_zeros_mac, vni);
afbd8bae 2314 if (f == NULL) {
dc5321d7 2315 if ((vxlan->cfg.flags & VXLAN_F_L2MISS) &&
afbd8bae
MR		 2316 !is_multicast_ether_addr(eth->h_dest))
2317 vxlan_fdb_miss(vxlan, eth->h_dest);
2318
2319 dev->stats.tx_dropped++;
8f646c92 2320 kfree_skb(skb);
afbd8bae
MR		 2321 return NETDEV_TX_OK;
2322 }
2323 }
6681712d 2324
afbd8bae
MR		 2325 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2326 struct sk_buff *skb1;
6681712d 2327
8f646c92
ED		 2328 if (!fdst) {
2329 fdst = rdst;
2330 continue;
2331 }
afbd8bae
MR		 2332 skb1 = skb_clone(skb, GFP_ATOMIC);
2333 if (skb1)
3ad7a4b1 2334 vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc);
6681712d
DS		 2335 }
2336
8f646c92 2337 if (fdst)
3ad7a4b1 2338 vxlan_xmit_one(skb, dev, vni, fdst, did_rsc);
8f646c92
ED		 2339 else
2340 kfree_skb(skb);
4ad16930 2341 return NETDEV_TX_OK;
6681712d
DS		 2342}
2343
d342894c 2344/* Walk the forwarding table and purge stale entries */
2345static void vxlan_cleanup(unsigned long arg)
2346{
2347 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
2348 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2349 unsigned int h;
2350
2351 if (!netif_running(vxlan->dev))
2352 return;
2353
d342894c 2354 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2355 struct hlist_node *p, *n;
14e1d0fa
SD		 2356
2357 spin_lock_bh(&vxlan->hash_lock);
d342894c 2358 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2359 struct vxlan_fdb *f
2360 = container_of(p, struct vxlan_fdb, hlist);
2361 unsigned long timeout;
2362
efb5f68f 2363 if (f->state & (NUD_PERMANENT | NUD_NOARP))
d342894c 2364 continue;
2365
def499c9
RP		 2366 if (f->flags & NTF_EXT_LEARNED)
2367 continue;
2368
0dfbdf41 2369 timeout = f->used + vxlan->cfg.age_interval * HZ;
d342894c 2370 if (time_before_eq(timeout, jiffies)) {
2371 netdev_dbg(vxlan->dev,
2372 "garbage collect %pM\n",
2373 f->eth_addr);
2374 f->state = NUD_STALE;
2375 vxlan_fdb_destroy(vxlan, f);
2376 } else if (time_before(timeout, next_timer))
2377 next_timer = timeout;
2378 }
14e1d0fa 2379 spin_unlock_bh(&vxlan->hash_lock);
d342894c 2380 }
d342894c 2381
2382 mod_timer(&vxlan->age_timer, next_timer);
2383}
2384
a53cb29b
MB		 2385static void vxlan_vs_del_dev(struct vxlan_dev *vxlan)
2386{
2387 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2388
2389 spin_lock(&vn->sock_lock);
69e76661
JB		 2390 hlist_del_init_rcu(&vxlan->hlist4.hlist);
2391#if IS_ENABLED(CONFIG_IPV6)
2392 hlist_del_init_rcu(&vxlan->hlist6.hlist);
2393#endif
a53cb29b
MB		 2394 spin_unlock(&vn->sock_lock);
2395}
2396
69e76661
JB		 2397static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan,
2398 struct vxlan_dev_node *node)
9c2e24e1 2399{
56ef9c90 2400 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
54bfd872 2401 __be32 vni = vxlan->default_dst.remote_vni;
9c2e24e1 2402
69e76661 2403 node->vxlan = vxlan;
56ef9c90 2404 spin_lock(&vn->sock_lock);
69e76661 2405 hlist_add_head_rcu(&node->hlist, vni_head(vs, vni));
56ef9c90 2406 spin_unlock(&vn->sock_lock);
9c2e24e1
PS		 2407}
2408
d342894c 2409/* Setup stats when device is created */
2410static int vxlan_init(struct net_device *dev)
2411{
1c213bd2 2412 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
e8171045 2413 if (!dev->tstats)
d342894c 2414 return -ENOMEM;
2415
2416 return 0;
2417}
2418
3ad7a4b1 2419static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni)
afbd8bae
MR		 2420{
2421 struct vxlan_fdb *f;
2422
2423 spin_lock_bh(&vxlan->hash_lock);
3ad7a4b1 2424 f = __vxlan_find_mac(vxlan, all_zeros_mac, vni);
afbd8bae
MR		 2425 if (f)
2426 vxlan_fdb_destroy(vxlan, f);
2427 spin_unlock_bh(&vxlan->hash_lock);
2428}
2429
ebf4063e
SH		 2430static void vxlan_uninit(struct net_device *dev)
2431{
2432 struct vxlan_dev *vxlan = netdev_priv(dev);
ebf4063e 2433
3ad7a4b1 2434 vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni);
afbd8bae 2435
ebf4063e
SH		 2436 free_percpu(dev->tstats);
2437}
2438
d342894c 2439/* Start ageing timer and join group when device is brought up */
2440static int vxlan_open(struct net_device *dev)
2441{
2442 struct vxlan_dev *vxlan = netdev_priv(dev);
205f356d 2443 int ret;
56ef9c90 2444
205f356d
JB		 2445 ret = vxlan_sock_add(vxlan);
2446 if (ret < 0)
2447 return ret;
d342894c 2448
79d4a94f 2449 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
56ef9c90 2450 ret = vxlan_igmp_join(vxlan);
bef0057b
MRL		 2451 if (ret == -EADDRINUSE)
2452 ret = 0;
56ef9c90 2453 if (ret) {
205f356d 2454 vxlan_sock_release(vxlan);
56ef9c90
MRL		 2455 return ret;
2456 }
d342894c 2457 }
2458
0dfbdf41 2459 if (vxlan->cfg.age_interval)
d342894c 2460 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2461
56ef9c90 2462 return ret;
d342894c 2463}
2464
2465/* Purge the forwarding table */
8b3f9337 2466static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all)
d342894c 2467{
31fec5aa 2468 unsigned int h;
d342894c 2469
2470 spin_lock_bh(&vxlan->hash_lock);
2471 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2472 struct hlist_node *p, *n;
2473 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2474 struct vxlan_fdb *f
2475 = container_of(p, struct vxlan_fdb, hlist);
8b3f9337
RP		 2476 if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP)))
2477 continue;
afbd8bae
MR		 2478 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2479 if (!is_zero_ether_addr(f->eth_addr))
2480 vxlan_fdb_destroy(vxlan, f);
d342894c 2481 }
2482 }
2483 spin_unlock_bh(&vxlan->hash_lock);
2484}
2485
2486/* Cleanup timer and forwarding table on shutdown */
2487static int vxlan_stop(struct net_device *dev)
2488{
2489 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2490 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
56ef9c90 2491 int ret = 0;
d342894c 2492
24c0e683 2493 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
f13b1689 2494 !vxlan_group_used(vn, vxlan))
56ef9c90 2495 ret = vxlan_igmp_leave(vxlan);
d342894c 2496
2497 del_timer_sync(&vxlan->age_timer);
2498
8b3f9337 2499 vxlan_flush(vxlan, false);
205f356d 2500 vxlan_sock_release(vxlan);
d342894c 2501
56ef9c90 2502 return ret;
d342894c 2503}
2504
d342894c 2505/* Stub, nothing needs to be done. */
2506static void vxlan_set_multicast_list(struct net_device *dev)
2507{
2508}
2509
91572088 2510static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
345010b5 2511{
91572088
JW		 2512 struct vxlan_dev *vxlan = netdev_priv(dev);
2513 struct vxlan_rdst *dst = &vxlan->default_dst;
2514 struct net_device *lowerdev = __dev_get_by_index(vxlan->net,
2515 dst->remote_ifindex);
ce44a4ae 2516 bool use_ipv6 = !!(vxlan->cfg.flags & VXLAN_F_IPV6);
345010b5 2517
91572088
JW		 2518 /* This check is different than dev->max_mtu, because it looks at
2519 * the lowerdev->mtu, rather than the static dev->max_mtu
2520 */
2521 if (lowerdev) {
2522 int max_mtu = lowerdev->mtu -
2523 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
2524 if (new_mtu > max_mtu)
72564b59 2525 return -EINVAL;
72564b59
DW		 2526 }
2527
345010b5
DB		 2528 dev->mtu = new_mtu;
2529 return 0;
2530}
2531
fc4099f1
PS		 2532static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
2533{
2534 struct vxlan_dev *vxlan = netdev_priv(dev);
2535 struct ip_tunnel_info *info = skb_tunnel_info(skb);
2536 __be16 sport, dport;
2537
2538 sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2539 vxlan->cfg.port_max, true);
2540 dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
2541
239e944f 2542 if (ip_tunnel_info_af(info) == AF_INET) {
c6fcc4fc 2543 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
1a8496ba
JB		 2544 struct rtable *rt;
2545
655c3de1 2546 rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos,
1a8496ba 2547 info->key.u.ipv4.dst,
22f0708a
PA		 2548 &info->key.u.ipv4.src, dport, sport,
2549 &info->dst_cache, info);
1a8496ba
JB		 2550 if (IS_ERR(rt))
2551 return PTR_ERR(rt);
2552 ip_rt_put(rt);
239e944f
JB		 2553 } else {
2554#if IS_ENABLED(CONFIG_IPV6)
03dc52a8 2555 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
239e944f
JB		 2556 struct dst_entry *ndst;
2557
655c3de1 2558 ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos,
e7f70af1 2559 info->key.label, &info->key.u.ipv6.dst,
22f0708a
PA		 2560 &info->key.u.ipv6.src, dport, sport,
2561 &info->dst_cache, info);
239e944f
JB		 2562 if (IS_ERR(ndst))
2563 return PTR_ERR(ndst);
2564 dst_release(ndst);
239e944f
JB		 2565#else /* !CONFIG_IPV6 */
2566 return -EPFNOSUPPORT;
2567#endif
2568 }
1a8496ba
JB		 2569 info->key.tp_src = sport;
2570 info->key.tp_dst = dport;
239e944f 2571 return 0;
fc4099f1
PS		 2572}
2573
0c867c9b 2574static const struct net_device_ops vxlan_netdev_ether_ops = {
d342894c 2575 .ndo_init = vxlan_init,
ebf4063e 2576 .ndo_uninit = vxlan_uninit,
d342894c 2577 .ndo_open = vxlan_open,
2578 .ndo_stop = vxlan_stop,
2579 .ndo_start_xmit = vxlan_xmit,
e8171045 2580 .ndo_get_stats64 = ip_tunnel_get_stats64,
d342894c 2581 .ndo_set_rx_mode = vxlan_set_multicast_list,
345010b5 2582 .ndo_change_mtu = vxlan_change_mtu,
d342894c 2583 .ndo_validate_addr = eth_validate_addr,
2584 .ndo_set_mac_address = eth_mac_addr,
2585 .ndo_fdb_add = vxlan_fdb_add,
2586 .ndo_fdb_del = vxlan_fdb_delete,
2587 .ndo_fdb_dump = vxlan_fdb_dump,
fc4099f1 2588 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
d342894c 2589};
2590
e1e5314d
JB		 2591static const struct net_device_ops vxlan_netdev_raw_ops = {
2592 .ndo_init = vxlan_init,
2593 .ndo_uninit = vxlan_uninit,
2594 .ndo_open = vxlan_open,
2595 .ndo_stop = vxlan_stop,
2596 .ndo_start_xmit = vxlan_xmit,
2597 .ndo_get_stats64 = ip_tunnel_get_stats64,
2598 .ndo_change_mtu = vxlan_change_mtu,
2599 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
2600};
2601
d342894c 2602/* Info for udev, that this is a virtual tunnel endpoint */
2603static struct device_type vxlan_type = {
2604 .name = "vxlan",
2605};
2606
e5de25dc 2607/* Calls the ndo_udp_tunnel_add of the caller in order to
35e42379 2608 * supply the listening VXLAN udp ports. Callers are expected
e5de25dc 2609 * to implement the ndo_udp_tunnel_add.
53cf5275 2610 */
b7aade15 2611static void vxlan_push_rx_ports(struct net_device *dev)
53cf5275
JG		 2612{
2613 struct vxlan_sock *vs;
2614 struct net *net = dev_net(dev);
2615 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
35e42379 2616 unsigned int i;
53cf5275
JG		 2617
2618 spin_lock(&vn->sock_lock);
2619 for (i = 0; i < PORT_HASH_SIZE; ++i) {
e7b3db5e
AD		 2620 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist)
2621 udp_tunnel_push_rx_port(dev, vs->sock,
b9adcd69
AD		 2622 (vs->flags & VXLAN_F_GPE) ?
2623 UDP_TUNNEL_TYPE_VXLAN_GPE :
e7b3db5e 2624 UDP_TUNNEL_TYPE_VXLAN);
53cf5275
JG		 2625 }
2626 spin_unlock(&vn->sock_lock);
2627}
53cf5275 2628
d342894c 2629/* Initialize the device structure. */
2630static void vxlan_setup(struct net_device *dev)
2631{
2632 struct vxlan_dev *vxlan = netdev_priv(dev);
31fec5aa 2633 unsigned int h;
d342894c 2634
65226ef8
JB		 2635 eth_hw_addr_random(dev);
2636 ether_setup(dev);
2637
cf124db5 2638 dev->needs_free_netdev = true;
d342894c 2639 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2640
d342894c 2641 dev->features |= NETIF_F_LLTX;
d6727fe3 2642 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
0afb1666 2643 dev->features |= NETIF_F_RXCSUM;
05c0db08 2644 dev->features |= NETIF_F_GSO_SOFTWARE;
0afb1666 2645
1eaa8178 2646 dev->vlan_features = dev->features;
0afb1666 2647 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
05c0db08 2648 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
02875878 2649 netif_keep_dst(dev);
0c867c9b 2650 dev->priv_flags |= IFF_NO_QUEUE;
d342894c 2651
a985343b
MS		 2652 /* MTU range: 68 - 65535 */
2653 dev->min_mtu = ETH_MIN_MTU;
2654 dev->max_mtu = ETH_MAX_MTU;
2655
553675fb 2656 INIT_LIST_HEAD(&vxlan->next);
d342894c 2657 spin_lock_init(&vxlan->hash_lock);
2658
2659 init_timer_deferrable(&vxlan->age_timer);
2660 vxlan->age_timer.function = vxlan_cleanup;
2661 vxlan->age_timer.data = (unsigned long) vxlan;
2662
2663 vxlan->dev = dev;
2664
58ce31cc
TH		 2665 gro_cells_init(&vxlan->gro_cells, dev);
2666
d342894c 2667 for (h = 0; h < FDB_HASH_SIZE; ++h)
2668 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2669}
2670
0c867c9b
JB		 2671static void vxlan_ether_setup(struct net_device *dev)
2672{
0c867c9b
JB		 2673 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
2674 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2675 dev->netdev_ops = &vxlan_netdev_ether_ops;
2676}
2677
e1e5314d
JB		 2678static void vxlan_raw_setup(struct net_device *dev)
2679{
65226ef8 2680 dev->header_ops = NULL;
e1e5314d
JB		 2681 dev->type = ARPHRD_NONE;
2682 dev->hard_header_len = 0;
2683 dev->addr_len = 0;
e1e5314d
JB		 2684 dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2685 dev->netdev_ops = &vxlan_netdev_raw_ops;
2686}
2687
d342894c 2688static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2689 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
5d174dd8 2690 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
e4c7ed41 2691 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
d342894c 2692 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2693 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
e4c7ed41 2694 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
d342894c 2695 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2696 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
e7f70af1 2697 [IFLA_VXLAN_LABEL] = { .type = NLA_U32 },
d342894c 2698 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2699 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2700 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
05f47d69 2701 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
e4f67add
DS		 2702 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2703 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2704 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2705 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
f8a9b1bc 2706 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
823aa873 2707 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
5c91ae08
TH		 2708 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2709 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2710 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
dfd8645e
TH		 2711 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2712 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
3511494c 2713 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
e1e5314d 2714 [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, },
0ace2ca8 2715 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
d342894c 2716};
2717
a8b8a889
MS		 2718static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[],
2719 struct netlink_ext_ack *extack)
d342894c 2720{
2721 if (tb[IFLA_ADDRESS]) {
2722 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2723 pr_debug("invalid link address (not ethernet)\n");
2724 return -EINVAL;
2725 }
2726
2727 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2728 pr_debug("invalid all zero ethernet address\n");
2729 return -EADDRNOTAVAIL;
2730 }
2731 }
2732
a985343b 2733 if (tb[IFLA_MTU]) {
019b13ae 2734 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
a985343b
MS		 2735
2736 if (mtu < ETH_MIN_MTU || mtu > ETH_MAX_MTU)
2737 return -EINVAL;
2738 }
2739
d342894c 2740 if (!data)
2741 return -EINVAL;
2742
2743 if (data[IFLA_VXLAN_ID]) {
a985343b
MS		 2744 u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2745
4e37d691 2746 if (id >= VXLAN_N_VID)
d342894c 2747 return -ERANGE;
2748 }
2749
05f47d69 2750 if (data[IFLA_VXLAN_PORT_RANGE]) {
2751 const struct ifla_vxlan_port_range *p
2752 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2753
2754 if (ntohs(p->high) < ntohs(p->low)) {
2755 pr_debug("port range %u .. %u not valid\n",
2756 ntohs(p->low), ntohs(p->high));
2757 return -EINVAL;
2758 }
2759 }
2760
d342894c 2761 return 0;
2762}
2763
1b13c97f
YB		 2764static void vxlan_get_drvinfo(struct net_device *netdev,
2765 struct ethtool_drvinfo *drvinfo)
2766{
2767 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2768 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2769}
2770
2771static const struct ethtool_ops vxlan_ethtool_ops = {
2772 .get_drvinfo = vxlan_get_drvinfo,
2773 .get_link = ethtool_op_get_link,
2774};
2775
3ee64f39
TH		 2776static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2777 __be16 port, u32 flags)
553675fb 2778{
e4c7ed41 2779 struct socket *sock;
3ee64f39
TH		 2780 struct udp_port_cfg udp_conf;
2781 int err;
e4c7ed41 2782
3ee64f39 2783 memset(&udp_conf, 0, sizeof(udp_conf));
e4c7ed41 2784
3ee64f39
TH		 2785 if (ipv6) {
2786 udp_conf.family = AF_INET6;
3ee64f39 2787 udp_conf.use_udp6_rx_checksums =
3dc2b6a8 2788 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
a43a9ef6 2789 udp_conf.ipv6_v6only = 1;
3ee64f39
TH		 2790 } else {
2791 udp_conf.family = AF_INET;
e4c7ed41 2792 }
e4c7ed41 2793
3ee64f39 2794 udp_conf.local_udp_port = port;
553675fb 2795
3ee64f39
TH		 2796 /* Open UDP socket */
2797 err = udp_sock_create(net, &udp_conf, &sock);
2798 if (err < 0)
2799 return ERR_PTR(err);
e4c7ed41 2800
39deb2c7 2801 return sock;
e4c7ed41
CW		 2802}
2803
2804/* Create new listen socket if needed */
b1be00a6
JB		 2805static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
2806 __be16 port, u32 flags)
e4c7ed41
CW		 2807{
2808 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2809 struct vxlan_sock *vs;
2810 struct socket *sock;
e4c7ed41 2811 unsigned int h;
acbf74a7 2812 struct udp_tunnel_sock_cfg tunnel_cfg;
e4c7ed41 2813
dc01e7d3 2814 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
e4c7ed41
CW		 2815 if (!vs)
2816 return ERR_PTR(-ENOMEM);
2817
2818 for (h = 0; h < VNI_HASH_SIZE; ++h)
2819 INIT_HLIST_HEAD(&vs->vni_list[h]);
2820
3ee64f39 2821 sock = vxlan_create_sock(net, ipv6, port, flags);
39deb2c7 2822 if (IS_ERR(sock)) {
553675fb 2823 kfree(vs);
e50fddc8 2824 return ERR_CAST(sock);
553675fb 2825 }
e4c7ed41
CW		 2826
2827 vs->sock = sock;
66af846f 2828 refcount_set(&vs->refcnt, 1);
af33c1ad 2829 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
553675fb 2830
9c2e24e1
PS		 2831 spin_lock(&vn->sock_lock);
2832 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
e7b3db5e 2833 udp_tunnel_notify_add_rx_port(sock,
b9adcd69
AD		 2834 (vs->flags & VXLAN_F_GPE) ?
2835 UDP_TUNNEL_TYPE_VXLAN_GPE :
e7b3db5e 2836 UDP_TUNNEL_TYPE_VXLAN);
9c2e24e1 2837 spin_unlock(&vn->sock_lock);
553675fb 2838
2839 /* Mark socket as an encapsulation socket. */
5602c48c 2840 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
acbf74a7
AZ		 2841 tunnel_cfg.sk_user_data = vs;
2842 tunnel_cfg.encap_type = 1;
f2d1968e 2843 tunnel_cfg.encap_rcv = vxlan_rcv;
acbf74a7 2844 tunnel_cfg.encap_destroy = NULL;
5602c48c
TH		 2845 tunnel_cfg.gro_receive = vxlan_gro_receive;
2846 tunnel_cfg.gro_complete = vxlan_gro_complete;
acbf74a7
AZ		 2847
2848 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
e4c7ed41 2849
9c2e24e1
PS		 2850 return vs;
2851}
2852
b1be00a6 2853static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6)
9c2e24e1 2854{
205f356d
JB		 2855 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2856 struct vxlan_sock *vs = NULL;
69e76661 2857 struct vxlan_dev_node *node;
9c2e24e1 2858
205f356d 2859 if (!vxlan->cfg.no_share) {
56ef9c90 2860 spin_lock(&vn->sock_lock);
205f356d 2861 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
dc5321d7 2862 vxlan->cfg.dst_port, vxlan->cfg.flags);
66af846f 2863 if (vs && !refcount_inc_not_zero(&vs->refcnt)) {
56ef9c90 2864 spin_unlock(&vn->sock_lock);
205f356d 2865 return -EBUSY;
56ef9c90
MRL		 2866 }
2867 spin_unlock(&vn->sock_lock);
2868 }
205f356d 2869 if (!vs)
b1be00a6 2870 vs = vxlan_socket_create(vxlan->net, ipv6,
dc5321d7 2871 vxlan->cfg.dst_port, vxlan->cfg.flags);
205f356d
JB		 2872 if (IS_ERR(vs))
2873 return PTR_ERR(vs);
b1be00a6 2874#if IS_ENABLED(CONFIG_IPV6)
69e76661 2875 if (ipv6) {
c6fcc4fc 2876 rcu_assign_pointer(vxlan->vn6_sock, vs);
69e76661
JB		 2877 node = &vxlan->hlist6;
2878 } else
b1be00a6 2879#endif
69e76661 2880 {
c6fcc4fc 2881 rcu_assign_pointer(vxlan->vn4_sock, vs);
69e76661
JB		 2882 node = &vxlan->hlist4;
2883 }
2884 vxlan_vs_add_dev(vs, vxlan, node);
205f356d 2885 return 0;
553675fb 2886}
2887
b1be00a6
JB		 2888static int vxlan_sock_add(struct vxlan_dev *vxlan)
2889{
dc5321d7
MS		 2890 bool metadata = vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA;
2891 bool ipv6 = vxlan->cfg.flags & VXLAN_F_IPV6 || metadata;
d074bf96 2892 bool ipv4 = !ipv6 || metadata;
b1be00a6
JB		 2893 int ret = 0;
2894
c6fcc4fc 2895 RCU_INIT_POINTER(vxlan->vn4_sock, NULL);
b1be00a6 2896#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 2897 RCU_INIT_POINTER(vxlan->vn6_sock, NULL);
d074bf96 2898 if (ipv6) {
b1be00a6 2899 ret = __vxlan_sock_add(vxlan, true);
d074bf96
JB		 2900 if (ret < 0 && ret != -EAFNOSUPPORT)
2901 ipv4 = false;
2902 }
b1be00a6 2903#endif
d074bf96 2904 if (ipv4)
b1be00a6
JB		 2905 ret = __vxlan_sock_add(vxlan, false);
2906 if (ret < 0)
2907 vxlan_sock_release(vxlan);
2908 return ret;
2909}
2910
a985343b
MS		 2911static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf,
2912 struct net_device **lower,
2913 struct vxlan_dev *old)
d342894c 2914{
33564bbb 2915 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
a985343b 2916 struct vxlan_dev *tmp;
e4c7ed41 2917 bool use_ipv6 = false;
d342894c 2918
a985343b
MS		 2919 if (conf->flags & VXLAN_F_GPE) {
2920 /* For now, allow GPE only together with
2921 * COLLECT_METADATA. This can be relaxed later; in such
2922 * case, the other side of the PtP link will have to be
2923 * provided.
2924 */
2925 if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) ||
2926 !(conf->flags & VXLAN_F_COLLECT_METADATA)) {
2927 return -EINVAL;
3555621d 2928 }
e1e5314d 2929 }
0c867c9b 2930
ce44a4ae
MS		 2931 if (!conf->remote_ip.sa.sa_family && !conf->saddr.sa.sa_family) {
2932 /* Unless IPv6 is explicitly requested, assume IPv4 */
a985343b 2933 conf->remote_ip.sa.sa_family = AF_INET;
ce44a4ae
MS		 2934 conf->saddr.sa.sa_family = AF_INET;
2935 } else if (!conf->remote_ip.sa.sa_family) {
2936 conf->remote_ip.sa.sa_family = conf->saddr.sa.sa_family;
2937 } else if (!conf->saddr.sa.sa_family) {
2938 conf->saddr.sa.sa_family = conf->remote_ip.sa.sa_family;
2939 }
2940
2941 if (conf->saddr.sa.sa_family != conf->remote_ip.sa.sa_family)
2942 return -EINVAL;
e4c7ed41 2943
0f22a3c6
MS		 2944 if (vxlan_addr_multicast(&conf->saddr))
2945 return -EINVAL;
2946
ce44a4ae 2947 if (conf->saddr.sa.sa_family == AF_INET6) {
057ba29b
JB		 2948 if (!IS_ENABLED(CONFIG_IPV6))
2949 return -EPFNOSUPPORT;
e4c7ed41 2950 use_ipv6 = true;
a985343b 2951 conf->flags |= VXLAN_F_IPV6;
0f22a3c6
MS		 2952
2953 if (!(conf->flags & VXLAN_F_COLLECT_METADATA)) {
2954 int local_type =
2955 ipv6_addr_type(&conf->saddr.sin6.sin6_addr);
2956 int remote_type =
2957 ipv6_addr_type(&conf->remote_ip.sin6.sin6_addr);
2958
2959 if (local_type & IPV6_ADDR_LINKLOCAL) {
2960 if (!(remote_type & IPV6_ADDR_LINKLOCAL) &&
2961 (remote_type != IPV6_ADDR_ANY))
2962 return -EINVAL;
2963
2964 conf->flags |= VXLAN_F_IPV6_LINKLOCAL;
2965 } else {
2966 if (remote_type ==
2967 (IPV6_ADDR_UNICAST | IPV6_ADDR_LINKLOCAL))
2968 return -EINVAL;
2969
2970 conf->flags &= ~VXLAN_F_IPV6_LINKLOCAL;
2971 }
2972 }
057ba29b 2973 }
d342894c 2974
a985343b 2975 if (conf->label && !use_ipv6)
e7f70af1 2976 return -EINVAL;
e7f70af1 2977
a985343b
MS		 2978 if (conf->remote_ifindex) {
2979 struct net_device *lowerdev;
34e02aa1 2980
a985343b
MS		 2981 lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex);
2982 if (!lowerdev)
34e02aa1 2983 return -ENODEV;
d342894c 2984
e4c7ed41
CW		 2985#if IS_ENABLED(CONFIG_IPV6)
2986 if (use_ipv6) {
2987 struct inet6_dev *idev = __in6_dev_get(lowerdev);
a985343b 2988 if (idev && idev->cnf.disable_ipv6)
e4c7ed41 2989 return -EPERM;
e4c7ed41
CW		 2990 }
2991#endif
2992
a985343b
MS		 2993 *lower = lowerdev;
2994 } else {
2995 if (vxlan_addr_multicast(&conf->remote_ip))
2996 return -EINVAL;
1ba56fb4 2997
0f22a3c6
MS		 2998#if IS_ENABLED(CONFIG_IPV6)
2999 if (conf->flags & VXLAN_F_IPV6_LINKLOCAL)
3000 return -EINVAL;
3001#endif
3002
a985343b 3003 *lower = NULL;
9dc2ad10 3004 }
d342894c 3005
a985343b
MS		 3006 if (!conf->dst_port) {
3007 if (conf->flags & VXLAN_F_GPE)
3008 conf->dst_port = htons(4790); /* IANA VXLAN-GPE port */
3009 else
3010 conf->dst_port = htons(vxlan_port);
d6acfeb1
FM		 3011 }
3012
a985343b
MS		 3013 if (!conf->age_interval)
3014 conf->age_interval = FDB_AGE_DEFAULT;
91572088 3015
a985343b
MS		 3016 list_for_each_entry(tmp, &vn->vxlan_list, next) {
3017 if (tmp == old)
3018 continue;
91572088 3019
49f810f0
MS		 3020 if (tmp->cfg.vni != conf->vni)
3021 continue;
3022 if (tmp->cfg.dst_port != conf->dst_port)
3023 continue;
3024 if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) !=
ce44a4ae 3025 (conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)))
49f810f0
MS		 3026 continue;
3027
3028 if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) &&
3029 tmp->cfg.remote_ifindex != conf->remote_ifindex)
3030 continue;
3031
3032 return -EEXIST;
a985343b 3033 }
91572088 3034
a985343b
MS		 3035 return 0;
3036}
3037
3038static void vxlan_config_apply(struct net_device *dev,
3039 struct vxlan_config *conf,
889ce937
SD		 3040 struct net_device *lowerdev,
3041 struct net *src_net,
3042 bool changelink)
a985343b
MS		 3043{
3044 struct vxlan_dev *vxlan = netdev_priv(dev);
3045 struct vxlan_rdst *dst = &vxlan->default_dst;
3046 unsigned short needed_headroom = ETH_HLEN;
3047 bool use_ipv6 = !!(conf->flags & VXLAN_F_IPV6);
3048 int max_mtu = ETH_MAX_MTU;
3049
3050 if (!changelink) {
3051 if (conf->flags & VXLAN_F_GPE)
3052 vxlan_raw_setup(dev);
3053 else
3054 vxlan_ether_setup(dev);
3055
3056 if (conf->mtu)
3057 dev->mtu = conf->mtu;
889ce937
SD		 3058
3059 vxlan->net = src_net;
a985343b
MS		 3060 }
3061
3062 dst->remote_vni = conf->vni;
3063
3064 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
3065
3066 if (lowerdev) {
3067 dst->remote_ifindex = conf->remote_ifindex;
3068
3069 dev->gso_max_size = lowerdev->gso_max_size;
3070 dev->gso_max_segs = lowerdev->gso_max_segs;
91572088 3071
a985343b 3072 needed_headroom = lowerdev->hard_header_len;
91572088 3073
a985343b
MS		 3074 max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM :
3075 VXLAN_HEADROOM);
7e059158
DW		 3076 }
3077
a985343b
MS		 3078 if (dev->mtu > max_mtu)
3079 dev->mtu = max_mtu;
3080
b1be00a6
JB		 3081 if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
3082 needed_headroom += VXLAN6_HEADROOM;
3083 else
3084 needed_headroom += VXLAN_HEADROOM;
3085 dev->needed_headroom = needed_headroom;
3086
0dfbdf41 3087 memcpy(&vxlan->cfg, conf, sizeof(*conf));
a985343b 3088}
0dfbdf41 3089
a985343b
MS		 3090static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
3091 struct vxlan_config *conf,
3092 bool changelink)
3093{
3094 struct vxlan_dev *vxlan = netdev_priv(dev);
3095 struct net_device *lowerdev;
3096 int ret;
0dfbdf41 3097
a985343b
MS		 3098 ret = vxlan_config_validate(src_net, conf, &lowerdev, vxlan);
3099 if (ret)
3100 return ret;
8bcdc4f3 3101
889ce937 3102 vxlan_config_apply(dev, conf, lowerdev, src_net, changelink);
0dfbdf41 3103
0dfbdf41
TG		 3104 return 0;
3105}
3106
c80498e3
ND		 3107static int __vxlan_dev_create(struct net *net, struct net_device *dev,
3108 struct vxlan_config *conf)
3109{
3110 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3111 struct vxlan_dev *vxlan = netdev_priv(dev);
3112 int err;
3113
3114 err = vxlan_dev_configure(net, dev, conf, false);
3115 if (err)
3116 return err;
3117
3118 dev->ethtool_ops = &vxlan_ethtool_ops;
3119
3120 /* create an fdb entry for a valid default destination */
3121 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
3122 err = vxlan_fdb_create(vxlan, all_zeros_mac,
3123 &vxlan->default_dst.remote_ip,
3124 NUD_REACHABLE | NUD_PERMANENT,
3125 NLM_F_EXCL | NLM_F_CREATE,
3126 vxlan->cfg.dst_port,
3127 vxlan->default_dst.remote_vni,
3128 vxlan->default_dst.remote_vni,
3129 vxlan->default_dst.remote_ifindex,
3130 NTF_SELF);
3131 if (err)
3132 return err;
3133 }
3134
3135 err = register_netdevice(dev);
3136 if (err) {
3137 vxlan_fdb_delete_default(vxlan, vxlan->default_dst.remote_vni);
3138 return err;
3139 }
3140
3141 list_add(&vxlan->next, &vn->vxlan_list);
3142 return 0;
3143}
3144
8bcdc4f3
RP		 3145static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
3146 struct net_device *dev, struct vxlan_config *conf,
3147 bool changelink)
0dfbdf41 3148{
8bcdc4f3 3149 struct vxlan_dev *vxlan = netdev_priv(dev);
0dfbdf41 3150
8bcdc4f3 3151 memset(conf, 0, sizeof(*conf));
e277de5f 3152
8bcdc4f3
RP		 3153 /* if changelink operation, start with old existing cfg */
3154 if (changelink)
3155 memcpy(conf, &vxlan->cfg, sizeof(*conf));
3156
3157 if (data[IFLA_VXLAN_ID]) {
3158 __be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
3159
3160 if (changelink && (vni != conf->vni))
3161 return -EOPNOTSUPP;
3162 conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
3163 }
0dfbdf41
TG		 3164
3165 if (data[IFLA_VXLAN_GROUP]) {
ce44a4ae
MS		 3166 if (changelink && (conf->remote_ip.sa.sa_family != AF_INET))
3167 return -EOPNOTSUPP;
3168
8bcdc4f3 3169 conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
ce44a4ae 3170 conf->remote_ip.sa.sa_family = AF_INET;
0dfbdf41
TG		 3171 } else if (data[IFLA_VXLAN_GROUP6]) {
3172 if (!IS_ENABLED(CONFIG_IPV6))
3173 return -EPFNOSUPPORT;
3174
ce44a4ae
MS		 3175 if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6))
3176 return -EOPNOTSUPP;
3177
8bcdc4f3
RP		 3178 conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
3179 conf->remote_ip.sa.sa_family = AF_INET6;
0dfbdf41
TG		 3180 }
3181
3182 if (data[IFLA_VXLAN_LOCAL]) {
ce44a4ae
MS		 3183 if (changelink && (conf->saddr.sa.sa_family != AF_INET))
3184 return -EOPNOTSUPP;
3185
8bcdc4f3
RP		 3186 conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
3187 conf->saddr.sa.sa_family = AF_INET;
0dfbdf41
TG		 3188 } else if (data[IFLA_VXLAN_LOCAL6]) {
3189 if (!IS_ENABLED(CONFIG_IPV6))
3190 return -EPFNOSUPPORT;
3191
ce44a4ae
MS		 3192 if (changelink && (conf->saddr.sa.sa_family != AF_INET6))
3193 return -EOPNOTSUPP;
3194
0dfbdf41 3195 /* TODO: respect scope id */
8bcdc4f3
RP		 3196 conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
3197 conf->saddr.sa.sa_family = AF_INET6;
0dfbdf41
TG		 3198 }
3199
3200 if (data[IFLA_VXLAN_LINK])
8bcdc4f3 3201 conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
0dfbdf41 3202
d342894c 3203 if (data[IFLA_VXLAN_TOS])
8bcdc4f3 3204 conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
d342894c 3205
afb97186 3206 if (data[IFLA_VXLAN_TTL])
8bcdc4f3 3207 conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
afb97186 3208
e7f70af1 3209 if (data[IFLA_VXLAN_LABEL])
8bcdc4f3 3210 conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) &
e7f70af1
DB		 3211 IPV6_FLOWLABEL_MASK;
3212
8bcdc4f3 3213 if (data[IFLA_VXLAN_LEARNING]) {
dc5321d7 3214 if (nla_get_u8(data[IFLA_VXLAN_LEARNING]))
8bcdc4f3 3215 conf->flags |= VXLAN_F_LEARN;
dc5321d7 3216 else
8bcdc4f3 3217 conf->flags &= ~VXLAN_F_LEARN;
8bcdc4f3
RP		 3218 } else if (!changelink) {
3219 /* default to learn on a new device */
3220 conf->flags |= VXLAN_F_LEARN;
3221 }
d342894c 3222
8bcdc4f3
RP		 3223 if (data[IFLA_VXLAN_AGEING]) {
3224 if (changelink)
3225 return -EOPNOTSUPP;
3226 conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
3227 }
d342894c 3228
8bcdc4f3
RP		 3229 if (data[IFLA_VXLAN_PROXY]) {
3230 if (changelink)
3231 return -EOPNOTSUPP;
3232 if (nla_get_u8(data[IFLA_VXLAN_PROXY]))
3233 conf->flags |= VXLAN_F_PROXY;
3234 }
e4f67add 3235
8bcdc4f3
RP		 3236 if (data[IFLA_VXLAN_RSC]) {
3237 if (changelink)
3238 return -EOPNOTSUPP;
3239 if (nla_get_u8(data[IFLA_VXLAN_RSC]))
3240 conf->flags |= VXLAN_F_RSC;
3241 }
e4f67add 3242
8bcdc4f3
RP		 3243 if (data[IFLA_VXLAN_L2MISS]) {
3244 if (changelink)
3245 return -EOPNOTSUPP;
3246 if (nla_get_u8(data[IFLA_VXLAN_L2MISS]))
3247 conf->flags |= VXLAN_F_L2MISS;
3248 }
e4f67add 3249
8bcdc4f3
RP		 3250 if (data[IFLA_VXLAN_L3MISS]) {
3251 if (changelink)
3252 return -EOPNOTSUPP;
3253 if (nla_get_u8(data[IFLA_VXLAN_L3MISS]))
3254 conf->flags |= VXLAN_F_L3MISS;
3255 }
e4f67add 3256
8bcdc4f3
RP		 3257 if (data[IFLA_VXLAN_LIMIT]) {
3258 if (changelink)
3259 return -EOPNOTSUPP;
3260 conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
3261 }
d342894c 3262
8bcdc4f3
RP		 3263 if (data[IFLA_VXLAN_COLLECT_METADATA]) {
3264 if (changelink)
3265 return -EOPNOTSUPP;
3266 if (nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
3267 conf->flags |= VXLAN_F_COLLECT_METADATA;
3268 }
f8a9b1bc 3269
05f47d69 3270 if (data[IFLA_VXLAN_PORT_RANGE]) {
8bcdc4f3
RP		 3271 if (!changelink) {
3272 const struct ifla_vxlan_port_range *p
3273 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
3274 conf->port_min = ntohs(p->low);
3275 conf->port_max = ntohs(p->high);
3276 } else {
3277 return -EOPNOTSUPP;
3278 }
05f47d69 3279 }
3280
8bcdc4f3
RP		 3281 if (data[IFLA_VXLAN_PORT]) {
3282 if (changelink)
3283 return -EOPNOTSUPP;
3284 conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
3285 }
823aa873 3286
8bcdc4f3
RP		 3287 if (data[IFLA_VXLAN_UDP_CSUM]) {
3288 if (changelink)
3289 return -EOPNOTSUPP;
3290 if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
3291 conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
3292 }
359a0ea9 3293
8bcdc4f3
RP		 3294 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) {
3295 if (changelink)
3296 return -EOPNOTSUPP;
3297 if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
3298 conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
3299 }
359a0ea9 3300
8bcdc4f3
RP		 3301 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) {
3302 if (changelink)
3303 return -EOPNOTSUPP;
3304 if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
3305 conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
3306 }
359a0ea9 3307
8bcdc4f3
RP		 3308 if (data[IFLA_VXLAN_REMCSUM_TX]) {
3309 if (changelink)
3310 return -EOPNOTSUPP;
3311 if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
3312 conf->flags |= VXLAN_F_REMCSUM_TX;
3313 }
dfd8645e 3314
8bcdc4f3
RP		 3315 if (data[IFLA_VXLAN_REMCSUM_RX]) {
3316 if (changelink)
3317 return -EOPNOTSUPP;
3318 if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
3319 conf->flags |= VXLAN_F_REMCSUM_RX;
3320 }
3321
3322 if (data[IFLA_VXLAN_GBP]) {
3323 if (changelink)
3324 return -EOPNOTSUPP;
3325 conf->flags |= VXLAN_F_GBP;
3326 }
3327
3328 if (data[IFLA_VXLAN_GPE]) {
3329 if (changelink)
3330 return -EOPNOTSUPP;
3331 conf->flags |= VXLAN_F_GPE;
3332 }
3333
3334 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) {
3335 if (changelink)
3336 return -EOPNOTSUPP;
3337 conf->flags |= VXLAN_F_REMCSUM_NOPARTIAL;
3338 }
3339
3340 if (tb[IFLA_MTU]) {
3341 if (changelink)
3342 return -EOPNOTSUPP;
3343 conf->mtu = nla_get_u32(tb[IFLA_MTU]);
3344 }
3345
3346 return 0;
3347}
3348
3349static int vxlan_newlink(struct net *src_net, struct net_device *dev,
7a3f4a18
MS		 3350 struct nlattr *tb[], struct nlattr *data[],
3351 struct netlink_ext_ack *extack)
8bcdc4f3 3352{
8bcdc4f3
RP		 3353 struct vxlan_config conf;
3354 int err;
3355
3356 err = vxlan_nl2conf(tb, data, dev, &conf, false);
3357 if (err)
3358 return err;
3359
c80498e3 3360 return __vxlan_dev_create(src_net, dev, &conf);
8bcdc4f3 3361}
dfd8645e 3362
8bcdc4f3 3363static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
ad744b22
MS		 3364 struct nlattr *data[],
3365 struct netlink_ext_ack *extack)
8bcdc4f3
RP		 3366{
3367 struct vxlan_dev *vxlan = netdev_priv(dev);
3368 struct vxlan_rdst *dst = &vxlan->default_dst;
3369 struct vxlan_rdst old_dst;
3370 struct vxlan_config conf;
3371 int err;
3372
3373 err = vxlan_nl2conf(tb, data,
3374 dev, &conf, true);
3375 if (err)
3376 return err;
3511494c 3377
8bcdc4f3 3378 memcpy(&old_dst, dst, sizeof(struct vxlan_rdst));
e1e5314d 3379
8bcdc4f3
RP		 3380 err = vxlan_dev_configure(vxlan->net, dev, &conf, true);
3381 if (err)
3382 return err;
0ace2ca8 3383
8bcdc4f3
RP		 3384 /* handle default dst entry */
3385 if (!vxlan_addr_equal(&dst->remote_ip, &old_dst.remote_ip)) {
3386 spin_lock_bh(&vxlan->hash_lock);
3387 if (!vxlan_addr_any(&old_dst.remote_ip))
3388 __vxlan_fdb_delete(vxlan, all_zeros_mac,
3389 old_dst.remote_ip,
3390 vxlan->cfg.dst_port,
3391 old_dst.remote_vni,
3392 old_dst.remote_vni,
3393 old_dst.remote_ifindex, 0);
3394
3395 if (!vxlan_addr_any(&dst->remote_ip)) {
3396 err = vxlan_fdb_create(vxlan, all_zeros_mac,
3397 &dst->remote_ip,
3398 NUD_REACHABLE | NUD_PERMANENT,
3399 NLM_F_CREATE | NLM_F_APPEND,
3400 vxlan->cfg.dst_port,
3401 dst->remote_vni,
3402 dst->remote_vni,
3403 dst->remote_ifindex,
3404 NTF_SELF);
3405 if (err) {
3406 spin_unlock_bh(&vxlan->hash_lock);
3407 return err;
3408 }
3409 }
3410 spin_unlock_bh(&vxlan->hash_lock);
3411 }
ce577668 3412
8bcdc4f3 3413 return 0;
d342894c 3414}
3415
3416static void vxlan_dellink(struct net_device *dev, struct list_head *head)
3417{
3418 struct vxlan_dev *vxlan = netdev_priv(dev);
3419
8b3f9337
RP		 3420 vxlan_flush(vxlan, true);
3421
58ce31cc 3422 gro_cells_destroy(&vxlan->gro_cells);
553675fb 3423 list_del(&vxlan->next);
d342894c 3424 unregister_netdevice_queue(dev, head);
3425}
3426
3427static size_t vxlan_get_size(const struct net_device *dev)
3428{
3429
3430 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
e4c7ed41 3431 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
d342894c 3432 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
e4c7ed41 3433 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
d342894c 3434 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
3435 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
e7f70af1 3436 nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */
d342894c 3437 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
e4f67add
DS		 3438 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
3439 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
3440 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
3441 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
da8b43c0 3442 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
d342894c 3443 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
3444 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
05f47d69 3445 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
359a0ea9
TH		 3446 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
3447 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
3448 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3449 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
dfd8645e
TH		 3450 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
3451 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
d342894c 3452 0;
3453}
3454
3455static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
3456{
3457 const struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 3458 const struct vxlan_rdst *dst = &vxlan->default_dst;
05f47d69 3459 struct ifla_vxlan_port_range ports = {
0dfbdf41
TG		 3460 .low = htons(vxlan->cfg.port_min),
3461 .high = htons(vxlan->cfg.port_max),
05f47d69 3462 };
d342894c 3463
54bfd872 3464 if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni)))
d342894c 3465 goto nla_put_failure;
3466
e4c7ed41
CW		 3467 if (!vxlan_addr_any(&dst->remote_ip)) {
3468 if (dst->remote_ip.sa.sa_family == AF_INET) {
930345ea
JB		 3469 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
3470 dst->remote_ip.sin.sin_addr.s_addr))
e4c7ed41
CW		 3471 goto nla_put_failure;
3472#if IS_ENABLED(CONFIG_IPV6)
3473 } else {
930345ea
JB		 3474 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
3475 &dst->remote_ip.sin6.sin6_addr))
e4c7ed41
CW		 3476 goto nla_put_failure;
3477#endif
3478 }
3479 }
d342894c 3480
c7995c43 3481 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
d342894c 3482 goto nla_put_failure;
3483
0dfbdf41
TG		 3484 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
3485 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
930345ea 3486 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
0dfbdf41 3487 vxlan->cfg.saddr.sin.sin_addr.s_addr))
e4c7ed41
CW		 3488 goto nla_put_failure;
3489#if IS_ENABLED(CONFIG_IPV6)
3490 } else {
930345ea 3491 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
0dfbdf41 3492 &vxlan->cfg.saddr.sin6.sin6_addr))
e4c7ed41
CW		 3493 goto nla_put_failure;
3494#endif
3495 }
3496 }
d342894c 3497
0dfbdf41
TG		 3498 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
3499 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
e7f70af1 3500 nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) ||
e4f67add 3501 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
dc5321d7 3502 !!(vxlan->cfg.flags & VXLAN_F_LEARN)) ||
e4f67add 3503 nla_put_u8(skb, IFLA_VXLAN_PROXY,
dc5321d7
MS		 3504 !!(vxlan->cfg.flags & VXLAN_F_PROXY)) ||
3505 nla_put_u8(skb, IFLA_VXLAN_RSC,
3506 !!(vxlan->cfg.flags & VXLAN_F_RSC)) ||
e4f67add 3507 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
dc5321d7 3508 !!(vxlan->cfg.flags & VXLAN_F_L2MISS)) ||
e4f67add 3509 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
dc5321d7 3510 !!(vxlan->cfg.flags & VXLAN_F_L3MISS)) ||
da8b43c0 3511 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
dc5321d7 3512 !!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)) ||
0dfbdf41
TG		 3513 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
3514 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
3515 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
359a0ea9 3516 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
dc5321d7 3517 !(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM_TX)) ||
359a0ea9 3518 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
dc5321d7 3519 !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
359a0ea9 3520 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
dc5321d7 3521 !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
dfd8645e 3522 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
dc5321d7 3523 !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_TX)) ||
dfd8645e 3524 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
dc5321d7 3525 !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_RX)))
d342894c 3526 goto nla_put_failure;
3527
05f47d69 3528 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
3529 goto nla_put_failure;
3530
dc5321d7 3531 if (vxlan->cfg.flags & VXLAN_F_GBP &&
3511494c
TG		 3532 nla_put_flag(skb, IFLA_VXLAN_GBP))
3533 goto nla_put_failure;
3534
dc5321d7 3535 if (vxlan->cfg.flags & VXLAN_F_GPE &&
e1e5314d
JB		 3536 nla_put_flag(skb, IFLA_VXLAN_GPE))
3537 goto nla_put_failure;
3538
dc5321d7 3539 if (vxlan->cfg.flags & VXLAN_F_REMCSUM_NOPARTIAL &&
0ace2ca8
TH		 3540 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3541 goto nla_put_failure;
3542
d342894c 3543 return 0;
3544
3545nla_put_failure:
3546 return -EMSGSIZE;
3547}
3548
1728d4fa
ND		 3549static struct net *vxlan_get_link_net(const struct net_device *dev)
3550{
3551 struct vxlan_dev *vxlan = netdev_priv(dev);
3552
3553 return vxlan->net;
3554}
3555
d342894c 3556static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3557 .kind = "vxlan",
3558 .maxtype = IFLA_VXLAN_MAX,
3559 .policy = vxlan_policy,
3560 .priv_size = sizeof(struct vxlan_dev),
3561 .setup = vxlan_setup,
3562 .validate = vxlan_validate,
3563 .newlink = vxlan_newlink,
8bcdc4f3 3564 .changelink = vxlan_changelink,
d342894c 3565 .dellink = vxlan_dellink,
3566 .get_size = vxlan_get_size,
3567 .fill_info = vxlan_fill_info,
1728d4fa 3568 .get_link_net = vxlan_get_link_net,
d342894c 3569};
3570
cf5da330
ND		 3571struct net_device *vxlan_dev_create(struct net *net, const char *name,
3572 u8 name_assign_type,
3573 struct vxlan_config *conf)
3574{
3575 struct nlattr *tb[IFLA_MAX + 1];
3576 struct net_device *dev;
3577 int err;
3578
3579 memset(&tb, 0, sizeof(tb));
3580
3581 dev = rtnl_create_link(net, name, name_assign_type,
3582 &vxlan_link_ops, tb);
3583 if (IS_ERR(dev))
3584 return dev;
3585
c80498e3 3586 err = __vxlan_dev_create(net, dev, conf);
cf5da330
ND		 3587 if (err < 0) {
3588 free_netdev(dev);
3589 return ERR_PTR(err);
3590 }
3591
3592 err = rtnl_configure_link(dev, NULL);
3593 if (err < 0) {
3594 LIST_HEAD(list_kill);
3595
3596 vxlan_dellink(dev, &list_kill);
3597 unregister_netdevice_many(&list_kill);
3598 return ERR_PTR(err);
3599 }
3600
3601 return dev;
3602}
3603EXPORT_SYMBOL_GPL(vxlan_dev_create);
3604
acaf4e70
DB		 3605static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3606 struct net_device *dev)
3607{
3608 struct vxlan_dev *vxlan, *next;
3609 LIST_HEAD(list_kill);
3610
3611 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3612 struct vxlan_rdst *dst = &vxlan->default_dst;
3613
3614 /* In case we created vxlan device with carrier
3615 * and we loose the carrier due to module unload
3616 * we also need to remove vxlan device. In other
3617 * cases, it's not necessary and remote_ifindex
3618 * is 0 here, so no matches.
3619 */
3620 if (dst->remote_ifindex == dev->ifindex)
3621 vxlan_dellink(vxlan->dev, &list_kill);
3622 }
3623
3624 unregister_netdevice_many(&list_kill);
3625}
3626
b7aade15
HFS		 3627static int vxlan_netdevice_event(struct notifier_block *unused,
3628 unsigned long event, void *ptr)
acaf4e70
DB		 3629{
3630 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
783c1463 3631 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
acaf4e70 3632
783c1463 3633 if (event == NETDEV_UNREGISTER)
acaf4e70 3634 vxlan_handle_lowerdev_unregister(vn, dev);
7c46a640 3635 else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO)
b7aade15 3636 vxlan_push_rx_ports(dev);
acaf4e70
DB		 3637
3638 return NOTIFY_DONE;
3639}
3640
3641static struct notifier_block vxlan_notifier_block __read_mostly = {
b7aade15 3642 .notifier_call = vxlan_netdevice_event,
acaf4e70
DB		 3643};
3644
d342894c 3645static __net_init int vxlan_init_net(struct net *net)
3646{
3647 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
31fec5aa 3648 unsigned int h;
d342894c 3649
553675fb 3650 INIT_LIST_HEAD(&vn->vxlan_list);
1c51a915 3651 spin_lock_init(&vn->sock_lock);
d342894c 3652
553675fb 3653 for (h = 0; h < PORT_HASH_SIZE; ++h)
3654 INIT_HLIST_HEAD(&vn->sock_list[h]);
d342894c 3655
3656 return 0;
3657}
3658
f01ec1c0
ND		 3659static void __net_exit vxlan_exit_net(struct net *net)
3660{
3661 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3662 struct vxlan_dev *vxlan, *next;
3663 struct net_device *dev, *aux;
3664 LIST_HEAD(list);
3665
3666 rtnl_lock();
3667 for_each_netdev_safe(net, dev, aux)
3668 if (dev->rtnl_link_ops == &vxlan_link_ops)
3669 unregister_netdevice_queue(dev, &list);
3670
3671 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3672 /* If vxlan->dev is in the same netns, it has already been added
3673 * to the list by the previous loop.
3674 */
58ce31cc
TH		 3675 if (!net_eq(dev_net(vxlan->dev), net)) {
3676 gro_cells_destroy(&vxlan->gro_cells);
13c3ed6a 3677 unregister_netdevice_queue(vxlan->dev, &list);
58ce31cc 3678 }
f01ec1c0
ND		 3679 }
3680
3681 unregister_netdevice_many(&list);
3682 rtnl_unlock();
3683}
3684
d342894c 3685static struct pernet_operations vxlan_net_ops = {
3686 .init = vxlan_init_net,
f01ec1c0 3687 .exit = vxlan_exit_net,
d342894c 3688 .id = &vxlan_net_id,
3689 .size = sizeof(struct vxlan_net),
3690};
3691
3692static int __init vxlan_init_module(void)
3693{
3694 int rc;
3695
3696 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3697
783c1463 3698 rc = register_pernet_subsys(&vxlan_net_ops);
d342894c 3699 if (rc)
3700 goto out1;
3701
acaf4e70 3702 rc = register_netdevice_notifier(&vxlan_notifier_block);
d342894c 3703 if (rc)
3704 goto out2;
3705
acaf4e70
DB		 3706 rc = rtnl_link_register(&vxlan_link_ops);
3707 if (rc)
3708 goto out3;
d342894c 3709
acaf4e70
DB		 3710 return 0;
3711out3:
3712 unregister_netdevice_notifier(&vxlan_notifier_block);
d342894c 3713out2:
783c1463 3714 unregister_pernet_subsys(&vxlan_net_ops);
d342894c 3715out1:
3716 return rc;
3717}
7332a13b 3718late_initcall(vxlan_init_module);
d342894c 3719
3720static void __exit vxlan_cleanup_module(void)
3721{
b7153984 3722 rtnl_link_unregister(&vxlan_link_ops);
acaf4e70 3723 unregister_netdevice_notifier(&vxlan_notifier_block);
783c1463
DB		 3724 unregister_pernet_subsys(&vxlan_net_ops);
3725 /* rcu_barrier() is called by netns */
d342894c 3726}
3727module_exit(vxlan_cleanup_module);
3728
3729MODULE_LICENSE("GPL");
3730MODULE_VERSION(VXLAN_VERSION);
3b8df3c6 3731MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
ead5139a 3732MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
d342894c 3733MODULE_ALIAS_RTNL_LINK("vxlan");
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