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hv_netvsc: Move subchannel waiting to rndis_filter_device_remove()
[deliverable/linux.git] / drivers / net / vxlan.c
CommitLineData
d342894c 1/*
eb5ce439 2 * VXLAN: Virtual eXtensible Local Area Network
d342894c 3 *
3b8df3c6 4 * Copyright (c) 2012-2013 Vyatta Inc.
d342894c 5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
d342894c 9 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <linux/kernel.h>
14#include <linux/types.h>
15#include <linux/module.h>
16#include <linux/errno.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/rculist.h>
20#include <linux/netdevice.h>
21#include <linux/in.h>
22#include <linux/ip.h>
23#include <linux/udp.h>
24#include <linux/igmp.h>
25#include <linux/etherdevice.h>
26#include <linux/if_ether.h>
1eaa8178 27#include <linux/if_vlan.h>
d342894c 28#include <linux/hash.h>
1b13c97f 29#include <linux/ethtool.h>
e4f67add
DS		 30#include <net/arp.h>
31#include <net/ndisc.h>
d342894c 32#include <net/ip.h>
c5441932 33#include <net/ip_tunnels.h>
d342894c 34#include <net/icmp.h>
35#include <net/udp.h>
3ee64f39 36#include <net/udp_tunnel.h>
d342894c 37#include <net/rtnetlink.h>
38#include <net/route.h>
39#include <net/dsfield.h>
40#include <net/inet_ecn.h>
41#include <net/net_namespace.h>
42#include <net/netns/generic.h>
012a5729 43#include <net/vxlan.h>
dc01e7d3 44#include <net/protocol.h>
40d29af0 45
e4c7ed41
CW		 46#if IS_ENABLED(CONFIG_IPV6)
47#include <net/ipv6.h>
48#include <net/addrconf.h>
49#include <net/ip6_tunnel.h>
660d98ca 50#include <net/ip6_checksum.h>
e4c7ed41 51#endif
ee122c79 52#include <net/dst_metadata.h>
d342894c 53
54#define VXLAN_VERSION "0.1"
55
553675fb 56#define PORT_HASH_BITS 8
57#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
d342894c 58#define FDB_AGE_DEFAULT 300 /* 5 min */
59#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
60
23c578bf 61/* UDP port for VXLAN traffic.
62 * The IANA assigned port is 4789, but the Linux default is 8472
234f5b73 63 * for compatibility with early adopters.
23c578bf 64 */
9daaa397
SH		 65static unsigned short vxlan_port __read_mostly = 8472;
66module_param_named(udp_port, vxlan_port, ushort, 0444);
d342894c 67MODULE_PARM_DESC(udp_port, "Destination UDP port");
68
69static bool log_ecn_error = true;
70module_param(log_ecn_error, bool, 0644);
71MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
72
60d9d4c6 73static int vxlan_net_id;
0dfbdf41 74static struct rtnl_link_ops vxlan_link_ops;
553675fb 75
7256eac1 76static const u8 all_zeros_mac[ETH_ALEN + 2];
afbd8bae 77
205f356d 78static int vxlan_sock_add(struct vxlan_dev *vxlan);
614732ea 79
553675fb 80/* per-network namespace private data for this module */
81struct vxlan_net {
82 struct list_head vxlan_list;
83 struct hlist_head sock_list[PORT_HASH_SIZE];
1c51a915 84 spinlock_t sock_lock;
553675fb 85};
86
d342894c 87/* Forwarding table entry */
88struct vxlan_fdb {
89 struct hlist_node hlist; /* linked list of entries */
90 struct rcu_head rcu;
91 unsigned long updated; /* jiffies */
92 unsigned long used;
3e61aa8f 93 struct list_head remotes;
7177a3b0 94 u8 eth_addr[ETH_ALEN];
d342894c 95 u16 state; /* see ndm_state */
ae884082 96 u8 flags; /* see ndm_flags */
d342894c 97};
98
d342894c 99/* salt for hash table */
100static u32 vxlan_salt __read_mostly;
758c57d1 101static struct workqueue_struct *vxlan_wq;
d342894c 102
ee122c79
TG		 103static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
104{
e7030878
TG		 105 return vs->flags & VXLAN_F_COLLECT_METADATA ||
106 ip_tunnel_collect_metadata();
ee122c79
TG		 107}
108
e4c7ed41
CW		 109#if IS_ENABLED(CONFIG_IPV6)
110static inline
111bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
112{
f0ef3126
JB		 113 if (a->sa.sa_family != b->sa.sa_family)
114 return false;
115 if (a->sa.sa_family == AF_INET6)
116 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
117 else
118 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 119}
120
121static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
122{
f0ef3126
JB		 123 if (ipa->sa.sa_family == AF_INET6)
124 return ipv6_addr_any(&ipa->sin6.sin6_addr);
125 else
126 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 127}
128
129static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
130{
f0ef3126
JB		 131 if (ipa->sa.sa_family == AF_INET6)
132 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
133 else
134 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 135}
136
137static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
138{
f0ef3126 139 if (nla_len(nla) >= sizeof(struct in6_addr)) {
67b61f6c 140 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
f0ef3126
JB		 141 ip->sa.sa_family = AF_INET6;
142 return 0;
143 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 144 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 145 ip->sa.sa_family = AF_INET;
146 return 0;
147 } else {
148 return -EAFNOSUPPORT;
149 }
e4c7ed41
CW		 150}
151
152static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 153 const union vxlan_addr *ip)
e4c7ed41 154{
f0ef3126 155 if (ip->sa.sa_family == AF_INET6)
930345ea 156 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
f0ef3126 157 else
930345ea 158 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 159}
160
161#else /* !CONFIG_IPV6 */
162
163static inline
164bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
165{
f0ef3126 166 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 167}
168
169static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
170{
f0ef3126 171 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 172}
173
174static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
175{
f0ef3126 176 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 177}
178
179static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
180{
f0ef3126
JB		 181 if (nla_len(nla) >= sizeof(struct in6_addr)) {
182 return -EAFNOSUPPORT;
183 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 184 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 185 ip->sa.sa_family = AF_INET;
186 return 0;
187 } else {
188 return -EAFNOSUPPORT;
189 }
e4c7ed41
CW		 190}
191
192static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 193 const union vxlan_addr *ip)
e4c7ed41 194{
930345ea 195 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 196}
197#endif
198
553675fb 199/* Virtual Network hash table head */
54bfd872 200static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni)
553675fb 201{
54bfd872 202 return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)];
553675fb 203}
204
205/* Socket hash table head */
206static inline struct hlist_head *vs_head(struct net *net, __be16 port)
d342894c 207{
208 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
209
553675fb 210 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
211}
212
3e61aa8f
SH		 213/* First remote destination for a forwarding entry.
214 * Guaranteed to be non-NULL because remotes are never deleted.
215 */
5ca5461c 216static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
3e61aa8f 217{
5ca5461c 218 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
219}
220
221static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
222{
223 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
3e61aa8f
SH		 224}
225
ac5132d1
TG		 226/* Find VXLAN socket based on network namespace, address family and UDP port
227 * and enabled unshareable flags.
228 */
229static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
230 __be16 port, u32 flags)
553675fb 231{
232 struct vxlan_sock *vs;
af33c1ad
TH		 233
234 flags &= VXLAN_F_RCV_FLAGS;
553675fb 235
236 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
19ca9fc1 237 if (inet_sk(vs->sock->sk)->inet_sport == port &&
705cc62f 238 vxlan_get_sk_family(vs) == family &&
af33c1ad 239 vs->flags == flags)
553675fb 240 return vs;
241 }
242 return NULL;
d342894c 243}
244
54bfd872 245static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, __be32 vni)
d342894c 246{
247 struct vxlan_dev *vxlan;
d342894c 248
b9167b2e
JB		 249 /* For flow based devices, map all packets to VNI 0 */
250 if (vs->flags & VXLAN_F_COLLECT_METADATA)
251 vni = 0;
252
54bfd872
JB		 253 hlist_for_each_entry_rcu(vxlan, vni_head(vs, vni), hlist) {
254 if (vxlan->default_dst.remote_vni == vni)
d342894c 255 return vxlan;
256 }
257
258 return NULL;
259}
260
5cfccc5a 261/* Look up VNI in a per net namespace table */
54bfd872 262static struct vxlan_dev *vxlan_find_vni(struct net *net, __be32 vni,
ac5132d1
TG		 263 sa_family_t family, __be16 port,
264 u32 flags)
5cfccc5a
PS		 265{
266 struct vxlan_sock *vs;
267
ac5132d1 268 vs = vxlan_find_sock(net, family, port, flags);
5cfccc5a
PS		 269 if (!vs)
270 return NULL;
271
54bfd872 272 return vxlan_vs_find_vni(vs, vni);
5cfccc5a
PS		 273}
274
d342894c 275/* Fill in neighbour message in skbuff. */
276static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
234f5b73
SH		 277 const struct vxlan_fdb *fdb,
278 u32 portid, u32 seq, int type, unsigned int flags,
279 const struct vxlan_rdst *rdst)
d342894c 280{
281 unsigned long now = jiffies;
282 struct nda_cacheinfo ci;
283 struct nlmsghdr *nlh;
284 struct ndmsg *ndm;
e4f67add 285 bool send_ip, send_eth;
d342894c 286
287 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
288 if (nlh == NULL)
289 return -EMSGSIZE;
290
291 ndm = nlmsg_data(nlh);
292 memset(ndm, 0, sizeof(*ndm));
e4f67add
DS		 293
294 send_eth = send_ip = true;
295
296 if (type == RTM_GETNEIGH) {
297 ndm->ndm_family = AF_INET;
e4c7ed41 298 send_ip = !vxlan_addr_any(&rdst->remote_ip);
e4f67add
DS		 299 send_eth = !is_zero_ether_addr(fdb->eth_addr);
300 } else
301 ndm->ndm_family = AF_BRIDGE;
d342894c 302 ndm->ndm_state = fdb->state;
303 ndm->ndm_ifindex = vxlan->dev->ifindex;
ae884082 304 ndm->ndm_flags = fdb->flags;
545469f7 305 ndm->ndm_type = RTN_UNICAST;
d342894c 306
193523bf 307 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
4967082b 308 nla_put_s32(skb, NDA_LINK_NETNSID,
7a0877d4 309 peernet2id_alloc(dev_net(vxlan->dev), vxlan->net)))
193523bf
ND		 310 goto nla_put_failure;
311
e4f67add 312 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
d342894c 313 goto nla_put_failure;
314
e4c7ed41 315 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
6681712d
DS		 316 goto nla_put_failure;
317
0dfbdf41 318 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
6681712d
DS		 319 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
320 goto nla_put_failure;
c7995c43 321 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
54bfd872 322 nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni)))
6681712d
DS		 323 goto nla_put_failure;
324 if (rdst->remote_ifindex &&
325 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
d342894c 326 goto nla_put_failure;
327
328 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
329 ci.ndm_confirmed = 0;
330 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
331 ci.ndm_refcnt = 0;
332
333 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
334 goto nla_put_failure;
335
053c095a
JB		 336 nlmsg_end(skb, nlh);
337 return 0;
d342894c 338
339nla_put_failure:
340 nlmsg_cancel(skb, nlh);
341 return -EMSGSIZE;
342}
343
344static inline size_t vxlan_nlmsg_size(void)
345{
346 return NLMSG_ALIGN(sizeof(struct ndmsg))
347 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
e4c7ed41 348 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
73cf3317 349 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
6681712d
DS		 350 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
351 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
4967082b 352 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
d342894c 353 + nla_total_size(sizeof(struct nda_cacheinfo));
354}
355
9e4b93f9
ND		 356static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
357 struct vxlan_rdst *rd, int type)
d342894c 358{
359 struct net *net = dev_net(vxlan->dev);
360 struct sk_buff *skb;
361 int err = -ENOBUFS;
362
363 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
364 if (skb == NULL)
365 goto errout;
366
9e4b93f9 367 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
d342894c 368 if (err < 0) {
369 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
370 WARN_ON(err == -EMSGSIZE);
371 kfree_skb(skb);
372 goto errout;
373 }
374
375 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
376 return;
377errout:
378 if (err < 0)
379 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
380}
381
e4c7ed41 382static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
e4f67add
DS		 383{
384 struct vxlan_dev *vxlan = netdev_priv(dev);
bb3fd687
SH		 385 struct vxlan_fdb f = {
386 .state = NUD_STALE,
387 };
388 struct vxlan_rdst remote = {
e4c7ed41 389 .remote_ip = *ipa, /* goes to NDA_DST */
54bfd872 390 .remote_vni = cpu_to_be32(VXLAN_N_VID),
bb3fd687 391 };
3e61aa8f 392
9e4b93f9 393 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 394}
395
396static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
397{
bb3fd687
SH		 398 struct vxlan_fdb f = {
399 .state = NUD_STALE,
400 };
9e4b93f9 401 struct vxlan_rdst remote = { };
e4f67add 402
e4f67add
DS		 403 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
404
9e4b93f9 405 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 406}
407
d342894c 408/* Hash Ethernet address */
409static u32 eth_hash(const unsigned char *addr)
410{
411 u64 value = get_unaligned((u64 *)addr);
412
413 /* only want 6 bytes */
414#ifdef __BIG_ENDIAN
d342894c 415 value >>= 16;
321fb991 416#else
417 value <<= 16;
d342894c 418#endif
419 return hash_64(value, FDB_HASH_BITS);
420}
421
422/* Hash chain to use given mac address */
423static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
424 const u8 *mac)
425{
426 return &vxlan->fdb_head[eth_hash(mac)];
427}
428
429/* Look up Ethernet address in forwarding table */
014be2c8 430static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
d342894c 431 const u8 *mac)
d342894c 432{
433 struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
434 struct vxlan_fdb *f;
d342894c 435
b67bfe0d 436 hlist_for_each_entry_rcu(f, head, hlist) {
7367d0b5 437 if (ether_addr_equal(mac, f->eth_addr))
d342894c 438 return f;
439 }
440
441 return NULL;
442}
443
014be2c8
SS		 444static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
445 const u8 *mac)
446{
447 struct vxlan_fdb *f;
448
449 f = __vxlan_find_mac(vxlan, mac);
450 if (f)
451 f->used = jiffies;
452
453 return f;
454}
455
a5e7c10a
MR		 456/* caller should hold vxlan->hash_lock */
457static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
e4c7ed41 458 union vxlan_addr *ip, __be16 port,
54bfd872 459 __be32 vni, __u32 ifindex)
6681712d 460{
3e61aa8f 461 struct vxlan_rdst *rd;
6681712d 462
3e61aa8f 463 list_for_each_entry(rd, &f->remotes, list) {
e4c7ed41 464 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
6681712d
DS		 465 rd->remote_port == port &&
466 rd->remote_vni == vni &&
467 rd->remote_ifindex == ifindex)
a5e7c10a 468 return rd;
6681712d 469 }
3e61aa8f 470
a5e7c10a
MR		 471 return NULL;
472}
473
906dc186
TR		 474/* Replace destination of unicast mac */
475static int vxlan_fdb_replace(struct vxlan_fdb *f,
54bfd872
JB		 476 union vxlan_addr *ip, __be16 port, __be32 vni,
477 __u32 ifindex)
906dc186
TR		 478{
479 struct vxlan_rdst *rd;
480
481 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
482 if (rd)
483 return 0;
484
485 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
486 if (!rd)
487 return 0;
0c1d70af
PA		 488
489 dst_cache_reset(&rd->dst_cache);
e4c7ed41 490 rd->remote_ip = *ip;
906dc186
TR		 491 rd->remote_port = port;
492 rd->remote_vni = vni;
493 rd->remote_ifindex = ifindex;
494 return 1;
495}
496
a5e7c10a
MR		 497/* Add/update destinations for multicast */
498static int vxlan_fdb_append(struct vxlan_fdb *f,
54bfd872 499 union vxlan_addr *ip, __be16 port, __be32 vni,
9e4b93f9 500 __u32 ifindex, struct vxlan_rdst **rdp)
a5e7c10a
MR		 501{
502 struct vxlan_rdst *rd;
503
504 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
505 if (rd)
506 return 0;
507
6681712d
DS		 508 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
509 if (rd == NULL)
510 return -ENOBUFS;
0c1d70af
PA		 511
512 if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) {
513 kfree(rd);
514 return -ENOBUFS;
515 }
516
e4c7ed41 517 rd->remote_ip = *ip;
6681712d
DS		 518 rd->remote_port = port;
519 rd->remote_vni = vni;
520 rd->remote_ifindex = ifindex;
3e61aa8f
SH		 521
522 list_add_tail_rcu(&rd->list, &f->remotes);
523
9e4b93f9 524 *rdp = rd;
6681712d
DS		 525 return 1;
526}
527
dfd8645e
TH		 528static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
529 unsigned int off,
530 struct vxlanhdr *vh, size_t hdrlen,
54bfd872
JB		 531 __be32 vni_field,
532 struct gro_remcsum *grc,
0ace2ca8 533 bool nopartial)
dfd8645e 534{
b7fe10e5 535 size_t start, offset;
dfd8645e
TH		 536
537 if (skb->remcsum_offload)
b7fe10e5 538 return vh;
dfd8645e
TH		 539
540 if (!NAPI_GRO_CB(skb)->csum_valid)
541 return NULL;
542
54bfd872
JB		 543 start = vxlan_rco_start(vni_field);
544 offset = start + vxlan_rco_offset(vni_field);
dfd8645e 545
b7fe10e5
TH		 546 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
547 start, offset, grc, nopartial);
dfd8645e
TH		 548
549 skb->remcsum_offload = 1;
550
551 return vh;
552}
553
a2b12f3c
TH		 554static struct sk_buff **vxlan_gro_receive(struct sk_buff **head,
555 struct sk_buff *skb,
556 struct udp_offload *uoff)
dc01e7d3
OG		 557{
558 struct sk_buff *p, **pp = NULL;
559 struct vxlanhdr *vh, *vh2;
9b174d88 560 unsigned int hlen, off_vx;
dc01e7d3 561 int flush = 1;
dfd8645e
TH		 562 struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock,
563 udp_offloads);
54bfd872 564 __be32 flags;
26c4f7da
TH		 565 struct gro_remcsum grc;
566
567 skb_gro_remcsum_init(&grc);
dc01e7d3
OG		 568
569 off_vx = skb_gro_offset(skb);
570 hlen = off_vx + sizeof(*vh);
571 vh = skb_gro_header_fast(skb, off_vx);
572 if (skb_gro_header_hard(skb, hlen)) {
573 vh = skb_gro_header_slow(skb, hlen, off_vx);
574 if (unlikely(!vh))
575 goto out;
576 }
dc01e7d3 577
dfd8645e
TH		 578 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
579
54bfd872 580 flags = vh->vx_flags;
dfd8645e
TH		 581
582 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
583 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
54bfd872 584 vh->vx_vni, &grc,
0ace2ca8
TH		 585 !!(vs->flags &
586 VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 587
588 if (!vh)
589 goto out;
590 }
591
b7fe10e5
TH		 592 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
593
dc01e7d3
OG		 594 flush = 0;
595
596 for (p = *head; p; p = p->next) {
597 if (!NAPI_GRO_CB(p)->same_flow)
598 continue;
599
600 vh2 = (struct vxlanhdr *)(p->data + off_vx);
3511494c
TG		 601 if (vh->vx_flags != vh2->vx_flags ||
602 vh->vx_vni != vh2->vx_vni) {
dc01e7d3
OG		 603 NAPI_GRO_CB(p)->same_flow = 0;
604 continue;
605 }
dc01e7d3
OG		 606 }
607
9b174d88 608 pp = eth_gro_receive(head, skb);
dc01e7d3 609
dc01e7d3 610out:
26c4f7da 611 skb_gro_remcsum_cleanup(skb, &grc);
dc01e7d3
OG		 612 NAPI_GRO_CB(skb)->flush |= flush;
613
614 return pp;
615}
616
a2b12f3c
TH		 617static int vxlan_gro_complete(struct sk_buff *skb, int nhoff,
618 struct udp_offload *uoff)
dc01e7d3 619{
cfdf1e1b
JG		 620 udp_tunnel_gro_complete(skb, nhoff);
621
9b174d88 622 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
dc01e7d3
OG		 623}
624
53cf5275 625/* Notify netdevs that UDP port started listening */
dc01e7d3 626static void vxlan_notify_add_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 627{
628 struct net_device *dev;
dc01e7d3 629 struct sock *sk = vs->sock->sk;
53cf5275 630 struct net *net = sock_net(sk);
705cc62f 631 sa_family_t sa_family = vxlan_get_sk_family(vs);
35e42379 632 __be16 port = inet_sk(sk)->inet_sport;
dc01e7d3
OG		 633 int err;
634
635 if (sa_family == AF_INET) {
787d7ac3 636 err = udp_add_offload(net, &vs->udp_offloads);
dc01e7d3
OG		 637 if (err)
638 pr_warn("vxlan: udp_add_offload failed with status %d\n", err);
639 }
53cf5275
JG		 640
641 rcu_read_lock();
642 for_each_netdev_rcu(net, dev) {
643 if (dev->netdev_ops->ndo_add_vxlan_port)
644 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
645 port);
646 }
647 rcu_read_unlock();
648}
649
650/* Notify netdevs that UDP port is no more listening */
dc01e7d3 651static void vxlan_notify_del_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 652{
653 struct net_device *dev;
dc01e7d3 654 struct sock *sk = vs->sock->sk;
53cf5275 655 struct net *net = sock_net(sk);
705cc62f 656 sa_family_t sa_family = vxlan_get_sk_family(vs);
35e42379 657 __be16 port = inet_sk(sk)->inet_sport;
53cf5275
JG		 658
659 rcu_read_lock();
660 for_each_netdev_rcu(net, dev) {
661 if (dev->netdev_ops->ndo_del_vxlan_port)
662 dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family,
663 port);
664 }
665 rcu_read_unlock();
dc01e7d3
OG		 666
667 if (sa_family == AF_INET)
668 udp_del_offload(&vs->udp_offloads);
53cf5275
JG		 669}
670
d342894c 671/* Add new entry to forwarding table -- assumes lock held */
672static int vxlan_fdb_create(struct vxlan_dev *vxlan,
e4c7ed41 673 const u8 *mac, union vxlan_addr *ip,
6681712d 674 __u16 state, __u16 flags,
54bfd872 675 __be16 port, __be32 vni, __u32 ifindex,
ae884082 676 __u8 ndm_flags)
d342894c 677{
9e4b93f9 678 struct vxlan_rdst *rd = NULL;
d342894c 679 struct vxlan_fdb *f;
680 int notify = 0;
681
014be2c8 682 f = __vxlan_find_mac(vxlan, mac);
d342894c 683 if (f) {
684 if (flags & NLM_F_EXCL) {
685 netdev_dbg(vxlan->dev,
686 "lost race to create %pM\n", mac);
687 return -EEXIST;
688 }
689 if (f->state != state) {
690 f->state = state;
691 f->updated = jiffies;
692 notify = 1;
693 }
ae884082
DS		 694 if (f->flags != ndm_flags) {
695 f->flags = ndm_flags;
696 f->updated = jiffies;
697 notify = 1;
698 }
906dc186
TR		 699 if ((flags & NLM_F_REPLACE)) {
700 /* Only change unicasts */
701 if (!(is_multicast_ether_addr(f->eth_addr) ||
702 is_zero_ether_addr(f->eth_addr))) {
60840429 703 notify |= vxlan_fdb_replace(f, ip, port, vni,
906dc186 704 ifindex);
906dc186
TR		 705 } else
706 return -EOPNOTSUPP;
707 }
6681712d 708 if ((flags & NLM_F_APPEND) &&
58e4c767
MR		 709 (is_multicast_ether_addr(f->eth_addr) ||
710 is_zero_ether_addr(f->eth_addr))) {
9e4b93f9
ND		 711 int rc = vxlan_fdb_append(f, ip, port, vni, ifindex,
712 &rd);
6681712d
DS		 713
714 if (rc < 0)
715 return rc;
716 notify |= rc;
717 }
d342894c 718 } else {
719 if (!(flags & NLM_F_CREATE))
720 return -ENOENT;
721
0dfbdf41
TG		 722 if (vxlan->cfg.addrmax &&
723 vxlan->addrcnt >= vxlan->cfg.addrmax)
d342894c 724 return -ENOSPC;
725
906dc186
TR		 726 /* Disallow replace to add a multicast entry */
727 if ((flags & NLM_F_REPLACE) &&
728 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
729 return -EOPNOTSUPP;
730
e4c7ed41 731 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
d342894c 732 f = kmalloc(sizeof(*f), GFP_ATOMIC);
733 if (!f)
734 return -ENOMEM;
735
736 notify = 1;
d342894c 737 f->state = state;
ae884082 738 f->flags = ndm_flags;
d342894c 739 f->updated = f->used = jiffies;
3e61aa8f 740 INIT_LIST_HEAD(&f->remotes);
d342894c 741 memcpy(f->eth_addr, mac, ETH_ALEN);
742
9e4b93f9 743 vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
3e61aa8f 744
d342894c 745 ++vxlan->addrcnt;
746 hlist_add_head_rcu(&f->hlist,
747 vxlan_fdb_head(vxlan, mac));
748 }
749
9e4b93f9
ND		 750 if (notify) {
751 if (rd == NULL)
752 rd = first_remote_rtnl(f);
753 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
754 }
d342894c 755
756 return 0;
757}
758
6706c82e 759static void vxlan_fdb_free(struct rcu_head *head)
6681712d
DS		 760{
761 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
3e61aa8f 762 struct vxlan_rdst *rd, *nd;
6681712d 763
0c1d70af
PA		 764 list_for_each_entry_safe(rd, nd, &f->remotes, list) {
765 dst_cache_destroy(&rd->dst_cache);
6681712d 766 kfree(rd);
0c1d70af 767 }
6681712d
DS		 768 kfree(f);
769}
770
d342894c 771static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
772{
773 netdev_dbg(vxlan->dev,
774 "delete %pM\n", f->eth_addr);
775
776 --vxlan->addrcnt;
9e4b93f9 777 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
d342894c 778
779 hlist_del_rcu(&f->hlist);
6681712d 780 call_rcu(&f->rcu, vxlan_fdb_free);
d342894c 781}
782
f0b074be 783static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
54bfd872
JB		 784 union vxlan_addr *ip, __be16 *port, __be32 *vni,
785 u32 *ifindex)
d342894c 786{
6681712d 787 struct net *net = dev_net(vxlan->dev);
e4c7ed41 788 int err;
d342894c 789
f0b074be 790 if (tb[NDA_DST]) {
e4c7ed41
CW		 791 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
792 if (err)
793 return err;
f0b074be 794 } else {
e4c7ed41
CW		 795 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
796 if (remote->sa.sa_family == AF_INET) {
797 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
798 ip->sa.sa_family = AF_INET;
799#if IS_ENABLED(CONFIG_IPV6)
800 } else {
801 ip->sin6.sin6_addr = in6addr_any;
802 ip->sa.sa_family = AF_INET6;
803#endif
804 }
f0b074be 805 }
d342894c 806
6681712d 807 if (tb[NDA_PORT]) {
73cf3317 808 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
6681712d 809 return -EINVAL;
f0b074be
MR		 810 *port = nla_get_be16(tb[NDA_PORT]);
811 } else {
0dfbdf41 812 *port = vxlan->cfg.dst_port;
f0b074be 813 }
6681712d
DS		 814
815 if (tb[NDA_VNI]) {
816 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
817 return -EINVAL;
54bfd872 818 *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
f0b074be
MR		 819 } else {
820 *vni = vxlan->default_dst.remote_vni;
821 }
6681712d
DS		 822
823 if (tb[NDA_IFINDEX]) {
5abb0029 824 struct net_device *tdev;
6681712d
DS		 825
826 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
827 return -EINVAL;
f0b074be 828 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
73763949 829 tdev = __dev_get_by_index(net, *ifindex);
5abb0029 830 if (!tdev)
6681712d 831 return -EADDRNOTAVAIL;
f0b074be
MR		 832 } else {
833 *ifindex = 0;
834 }
835
836 return 0;
837}
838
839/* Add static entry (via netlink) */
840static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
841 struct net_device *dev,
f6f6424b 842 const unsigned char *addr, u16 vid, u16 flags)
f0b074be
MR		 843{
844 struct vxlan_dev *vxlan = netdev_priv(dev);
845 /* struct net *net = dev_net(vxlan->dev); */
e4c7ed41 846 union vxlan_addr ip;
f0b074be 847 __be16 port;
54bfd872
JB		 848 __be32 vni;
849 u32 ifindex;
f0b074be
MR		 850 int err;
851
852 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
853 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
854 ndm->ndm_state);
855 return -EINVAL;
856 }
857
858 if (tb[NDA_DST] == NULL)
859 return -EINVAL;
860
861 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
862 if (err)
863 return err;
6681712d 864
5933a7bb
MR		 865 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
866 return -EAFNOSUPPORT;
867
d342894c 868 spin_lock_bh(&vxlan->hash_lock);
e4c7ed41 869 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
73cf3317 870 port, vni, ifindex, ndm->ndm_flags);
d342894c 871 spin_unlock_bh(&vxlan->hash_lock);
872
873 return err;
874}
875
876/* Delete entry (via netlink) */
1690be63
VY		 877static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
878 struct net_device *dev,
f6f6424b 879 const unsigned char *addr, u16 vid)
d342894c 880{
881 struct vxlan_dev *vxlan = netdev_priv(dev);
882 struct vxlan_fdb *f;
bc7892ba 883 struct vxlan_rdst *rd = NULL;
e4c7ed41 884 union vxlan_addr ip;
bc7892ba 885 __be16 port;
54bfd872
JB		 886 __be32 vni;
887 u32 ifindex;
bc7892ba
MR		 888 int err;
889
890 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
891 if (err)
892 return err;
893
894 err = -ENOENT;
d342894c 895
896 spin_lock_bh(&vxlan->hash_lock);
897 f = vxlan_find_mac(vxlan, addr);
bc7892ba
MR		 898 if (!f)
899 goto out;
900
e4c7ed41
CW		 901 if (!vxlan_addr_any(&ip)) {
902 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
bc7892ba
MR		 903 if (!rd)
904 goto out;
905 }
906
907 err = 0;
908
909 /* remove a destination if it's not the only one on the list,
910 * otherwise destroy the fdb entry
911 */
912 if (rd && !list_is_singular(&f->remotes)) {
913 list_del_rcu(&rd->list);
9e4b93f9 914 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
dcdc7a59 915 kfree_rcu(rd, rcu);
bc7892ba 916 goto out;
d342894c 917 }
bc7892ba
MR		 918
919 vxlan_fdb_destroy(vxlan, f);
920
921out:
d342894c 922 spin_unlock_bh(&vxlan->hash_lock);
923
924 return err;
925}
926
927/* Dump forwarding table */
928static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3
JHS		 929 struct net_device *dev,
930 struct net_device *filter_dev, int idx)
d342894c 931{
932 struct vxlan_dev *vxlan = netdev_priv(dev);
933 unsigned int h;
934
935 for (h = 0; h < FDB_HASH_SIZE; ++h) {
936 struct vxlan_fdb *f;
d342894c 937 int err;
938
b67bfe0d 939 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
6681712d 940 struct vxlan_rdst *rd;
6681712d 941
3e61aa8f 942 list_for_each_entry_rcu(rd, &f->remotes, list) {
07a51cd3
AW		 943 if (idx < cb->args[0])
944 goto skip;
945
6681712d
DS		 946 err = vxlan_fdb_info(skb, vxlan, f,
947 NETLINK_CB(cb->skb).portid,
948 cb->nlh->nlmsg_seq,
949 RTM_NEWNEIGH,
950 NLM_F_MULTI, rd);
951 if (err < 0)
3e61aa8f 952 goto out;
3e61aa8f 953skip:
07a51cd3
AW		 954 ++idx;
955 }
d342894c 956 }
957 }
3e61aa8f 958out:
d342894c 959 return idx;
960}
961
962/* Watch incoming packets to learn mapping between Ethernet address
963 * and Tunnel endpoint.
c4b49512 964 * Return true if packet is bogus and should be dropped.
d342894c 965 */
26a41ae6 966static bool vxlan_snoop(struct net_device *dev,
e4c7ed41 967 union vxlan_addr *src_ip, const u8 *src_mac)
d342894c 968{
969 struct vxlan_dev *vxlan = netdev_priv(dev);
970 struct vxlan_fdb *f;
d342894c 971
972 f = vxlan_find_mac(vxlan, src_mac);
973 if (likely(f)) {
5ca5461c 974 struct vxlan_rdst *rdst = first_remote_rcu(f);
3e61aa8f 975
e4c7ed41 976 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip)))
26a41ae6 977 return false;
978
979 /* Don't migrate static entries, drop packets */
eb064c3b 980 if (f->state & NUD_NOARP)
26a41ae6 981 return true;
d342894c 982
983 if (net_ratelimit())
984 netdev_info(dev,
e4c7ed41 985 "%pM migrated from %pIS to %pIS\n",
a4870f79 986 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
d342894c 987
e4c7ed41 988 rdst->remote_ip = *src_ip;
d342894c 989 f->updated = jiffies;
9e4b93f9 990 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
d342894c 991 } else {
992 /* learned new entry */
993 spin_lock(&vxlan->hash_lock);
3bf74b1a 994
995 /* close off race between vxlan_flush and incoming packets */
996 if (netif_running(dev))
997 vxlan_fdb_create(vxlan, src_mac, src_ip,
998 NUD_REACHABLE,
999 NLM_F_EXCL|NLM_F_CREATE,
0dfbdf41 1000 vxlan->cfg.dst_port,
3bf74b1a 1001 vxlan->default_dst.remote_vni,
1002 0, NTF_SELF);
d342894c 1003 spin_unlock(&vxlan->hash_lock);
1004 }
26a41ae6 1005
1006 return false;
d342894c 1007}
1008
d342894c 1009/* See if multicast group is already in use by other ID */
95ab0991 1010static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
d342894c 1011{
553675fb 1012 struct vxlan_dev *vxlan;
b1be00a6 1013 unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
d342894c 1014
95ab0991
G		 1015 /* The vxlan_sock is only used by dev, leaving group has
1016 * no effect on other vxlan devices.
1017 */
b1be00a6
JB		 1018 if (family == AF_INET && dev->vn4_sock &&
1019 atomic_read(&dev->vn4_sock->refcnt) == 1)
95ab0991 1020 return false;
b1be00a6
JB		 1021#if IS_ENABLED(CONFIG_IPV6)
1022 if (family == AF_INET6 && dev->vn6_sock &&
1023 atomic_read(&dev->vn6_sock->refcnt) == 1)
1024 return false;
1025#endif
95ab0991 1026
553675fb 1027 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
95ab0991 1028 if (!netif_running(vxlan->dev) || vxlan == dev)
553675fb 1029 continue;
d342894c 1030
b1be00a6 1031 if (family == AF_INET && vxlan->vn4_sock != dev->vn4_sock)
95ab0991 1032 continue;
b1be00a6
JB		 1033#if IS_ENABLED(CONFIG_IPV6)
1034 if (family == AF_INET6 && vxlan->vn6_sock != dev->vn6_sock)
1035 continue;
1036#endif
95ab0991
G		 1037
1038 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1039 &dev->default_dst.remote_ip))
1040 continue;
1041
1042 if (vxlan->default_dst.remote_ifindex !=
1043 dev->default_dst.remote_ifindex)
1044 continue;
1045
1046 return true;
553675fb 1047 }
d342894c 1048
1049 return false;
1050}
1051
b1be00a6 1052static void __vxlan_sock_release(struct vxlan_sock *vs)
7c47cedf 1053{
b1be00a6 1054 struct vxlan_net *vn;
012a5729 1055
b1be00a6
JB		 1056 if (!vs)
1057 return;
7c47cedf
SH		 1058 if (!atomic_dec_and_test(&vs->refcnt))
1059 return;
d342894c 1060
b1be00a6 1061 vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id);
1c51a915 1062 spin_lock(&vn->sock_lock);
7c47cedf 1063 hlist_del_rcu(&vs->hlist);
dc01e7d3 1064 vxlan_notify_del_rx_port(vs);
1c51a915
SH		 1065 spin_unlock(&vn->sock_lock);
1066
7c47cedf 1067 queue_work(vxlan_wq, &vs->del_work);
d342894c 1068}
1069
b1be00a6
JB		 1070static void vxlan_sock_release(struct vxlan_dev *vxlan)
1071{
1072 __vxlan_sock_release(vxlan->vn4_sock);
1073#if IS_ENABLED(CONFIG_IPV6)
1074 __vxlan_sock_release(vxlan->vn6_sock);
1075#endif
1076}
1077
56ef9c90 1078/* Update multicast group membership when first VNI on
c4b49512 1079 * multicast address is brought up
7c47cedf 1080 */
56ef9c90 1081static int vxlan_igmp_join(struct vxlan_dev *vxlan)
d342894c 1082{
b1be00a6 1083 struct sock *sk;
e4c7ed41
CW		 1084 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1085 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1086 int ret = -EINVAL;
d342894c 1087
e4c7ed41
CW		 1088 if (ip->sa.sa_family == AF_INET) {
1089 struct ip_mreqn mreq = {
1090 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1091 .imr_ifindex = ifindex,
1092 };
1093
b1be00a6
JB		 1094 sk = vxlan->vn4_sock->sock->sk;
1095 lock_sock(sk);
56ef9c90 1096 ret = ip_mc_join_group(sk, &mreq);
b1be00a6 1097 release_sock(sk);
e4c7ed41
CW		 1098#if IS_ENABLED(CONFIG_IPV6)
1099 } else {
b1be00a6
JB		 1100 sk = vxlan->vn6_sock->sock->sk;
1101 lock_sock(sk);
56ef9c90
MRL		 1102 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1103 &ip->sin6.sin6_addr);
b1be00a6 1104 release_sock(sk);
e4c7ed41
CW		 1105#endif
1106 }
3fc2de2f 1107
56ef9c90 1108 return ret;
3fc2de2f 1109}
1110
1111/* Inverse of vxlan_igmp_join when last VNI is brought down */
56ef9c90 1112static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
3fc2de2f 1113{
b1be00a6 1114 struct sock *sk;
e4c7ed41
CW		 1115 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1116 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1117 int ret = -EINVAL;
3fc2de2f 1118
e4c7ed41
CW		 1119 if (ip->sa.sa_family == AF_INET) {
1120 struct ip_mreqn mreq = {
1121 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1122 .imr_ifindex = ifindex,
1123 };
1124
b1be00a6
JB		 1125 sk = vxlan->vn4_sock->sock->sk;
1126 lock_sock(sk);
56ef9c90 1127 ret = ip_mc_leave_group(sk, &mreq);
b1be00a6 1128 release_sock(sk);
e4c7ed41
CW		 1129#if IS_ENABLED(CONFIG_IPV6)
1130 } else {
b1be00a6
JB		 1131 sk = vxlan->vn6_sock->sock->sk;
1132 lock_sock(sk);
56ef9c90
MRL		 1133 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1134 &ip->sin6.sin6_addr);
b1be00a6 1135 release_sock(sk);
e4c7ed41
CW		 1136#endif
1137 }
d342894c 1138
56ef9c90 1139 return ret;
d342894c 1140}
1141
f14ecebb
JB		 1142static bool vxlan_remcsum(struct vxlanhdr *unparsed,
1143 struct sk_buff *skb, u32 vxflags)
dfd8645e
TH		 1144{
1145 size_t start, offset, plen;
dfd8645e 1146
f14ecebb
JB		 1147 if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload)
1148 goto out;
b7fe10e5 1149
f14ecebb
JB		 1150 start = vxlan_rco_start(unparsed->vx_vni);
1151 offset = start + vxlan_rco_offset(unparsed->vx_vni);
dfd8645e 1152
be5cfeab 1153 plen = sizeof(struct vxlanhdr) + offset + sizeof(u16);
dfd8645e
TH		 1154
1155 if (!pskb_may_pull(skb, plen))
be5cfeab 1156 return false;
dfd8645e 1157
be5cfeab
JB		 1158 skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset,
1159 !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL));
f14ecebb
JB		 1160out:
1161 unparsed->vx_flags &= ~VXLAN_HF_RCO;
1162 unparsed->vx_vni &= VXLAN_VNI_MASK;
be5cfeab 1163 return true;
dfd8645e
TH		 1164}
1165
f14ecebb 1166static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed,
64f87d36 1167 struct sk_buff *skb, u32 vxflags,
10a5af23 1168 struct vxlan_metadata *md)
3288af08 1169{
f14ecebb 1170 struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed;
10a5af23 1171 struct metadata_dst *tun_dst;
f14ecebb
JB		 1172
1173 if (!(unparsed->vx_flags & VXLAN_HF_GBP))
1174 goto out;
3288af08 1175
3288af08
JB		 1176 md->gbp = ntohs(gbp->policy_id);
1177
10a5af23 1178 tun_dst = (struct metadata_dst *)skb_dst(skb);
3288af08
JB		 1179 if (tun_dst)
1180 tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
1181
1182 if (gbp->dont_learn)
1183 md->gbp |= VXLAN_GBP_DONT_LEARN;
1184
1185 if (gbp->policy_applied)
1186 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
f14ecebb 1187
64f87d36
JB		 1188 /* In flow-based mode, GBP is carried in dst_metadata */
1189 if (!(vxflags & VXLAN_F_COLLECT_METADATA))
1190 skb->mark = md->gbp;
f14ecebb
JB		 1191out:
1192 unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
3288af08
JB		 1193}
1194
1ab016e2
JB		 1195static bool vxlan_set_mac(struct vxlan_dev *vxlan,
1196 struct vxlan_sock *vs,
1197 struct sk_buff *skb)
614732ea 1198{
614732ea 1199 union vxlan_addr saddr;
614732ea 1200
614732ea 1201 skb_reset_mac_header(skb);
614732ea
TG		 1202 skb->protocol = eth_type_trans(skb, vxlan->dev);
1203 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1204
1205 /* Ignore packet loops (and multicast echo) */
1206 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
1ab016e2 1207 return false;
614732ea 1208
760c6805 1209 /* Get address from the outer IP header */
ce212d0f 1210 if (vxlan_get_sk_family(vs) == AF_INET) {
1ab016e2 1211 saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
614732ea
TG		 1212 saddr.sa.sa_family = AF_INET;
1213#if IS_ENABLED(CONFIG_IPV6)
1214 } else {
1ab016e2 1215 saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
614732ea
TG		 1216 saddr.sa.sa_family = AF_INET6;
1217#endif
1218 }
1219
1ab016e2
JB		 1220 if ((vxlan->flags & VXLAN_F_LEARN) &&
1221 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source))
1222 return false;
1223
1224 return true;
1225}
1226
760c6805
JB		 1227static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph,
1228 struct sk_buff *skb)
1229{
1230 int err = 0;
1231
1232 if (vxlan_get_sk_family(vs) == AF_INET)
1233 err = IP_ECN_decapsulate(oiph, skb);
1234#if IS_ENABLED(CONFIG_IPV6)
1235 else
1236 err = IP6_ECN_decapsulate(oiph, skb);
1237#endif
1238
1239 if (unlikely(err) && log_ecn_error) {
1240 if (vxlan_get_sk_family(vs) == AF_INET)
1241 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1242 &((struct iphdr *)oiph)->saddr,
1243 ((struct iphdr *)oiph)->tos);
1244 else
1245 net_info_ratelimited("non-ECT from %pI6\n",
1246 &((struct ipv6hdr *)oiph)->saddr);
1247 }
1248 return err <= 1;
1249}
1250
d342894c 1251/* Callback from net/ipv4/udp.c to receive packets */
f2d1968e 1252static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
d342894c 1253{
f2d1968e 1254 struct pcpu_sw_netstats *stats;
c9e78efb 1255 struct vxlan_dev *vxlan;
5cfccc5a 1256 struct vxlan_sock *vs;
f14ecebb 1257 struct vxlanhdr unparsed;
ee122c79
TG		 1258 struct vxlan_metadata _md;
1259 struct vxlan_metadata *md = &_md;
f2d1968e 1260 void *oiph;
d342894c 1261
d342894c 1262 /* Need Vxlan and inner Ethernet header to be present */
7ce04758 1263 if (!pskb_may_pull(skb, VXLAN_HLEN))
288b01c8 1264 return 1;
d342894c 1265
f14ecebb 1266 unparsed = *vxlan_hdr(skb);
288b01c8
JB		 1267 /* VNI flag always required to be set */
1268 if (!(unparsed.vx_flags & VXLAN_HF_VNI)) {
1269 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1270 ntohl(vxlan_hdr(skb)->vx_flags),
1271 ntohl(vxlan_hdr(skb)->vx_vni));
1272 /* Return non vxlan pkt */
1273 return 1;
d342894c 1274 }
288b01c8
JB		 1275 unparsed.vx_flags &= ~VXLAN_HF_VNI;
1276 unparsed.vx_vni &= ~VXLAN_VNI_MASK;
d342894c 1277
559835ea 1278 vs = rcu_dereference_sk_user_data(sk);
5cfccc5a 1279 if (!vs)
d342894c 1280 goto drop;
d342894c 1281
c9e78efb
JB		 1282 vxlan = vxlan_vs_find_vni(vs, vxlan_vni(vxlan_hdr(skb)->vx_vni));
1283 if (!vxlan)
1284 goto drop;
1285
7f290c94
JB		 1286 if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB),
1287 !net_eq(vxlan->net, dev_net(vxlan->dev))))
c9e78efb
JB		 1288 goto drop;
1289
ee122c79 1290 if (vxlan_collect_metadata(vs)) {
07dabf20 1291 __be32 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);
10a5af23 1292 struct metadata_dst *tun_dst;
07dabf20 1293
c29a70d2 1294 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
07dabf20 1295 vxlan_vni_to_tun_id(vni), sizeof(*md));
c29a70d2 1296
ee122c79
TG		 1297 if (!tun_dst)
1298 goto drop;
1299
0f1b7354 1300 md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
10a5af23
JB		 1301
1302 skb_dst_set(skb, (struct dst_entry *)tun_dst);
ee122c79
TG		 1303 } else {
1304 memset(md, 0, sizeof(*md));
1305 }
1306
3511494c
TG		 1307 /* For backwards compatibility, only allow reserved fields to be
1308 * used by VXLAN extensions if explicitly requested.
1309 */
f14ecebb
JB		 1310 if (vs->flags & VXLAN_F_REMCSUM_RX)
1311 if (!vxlan_remcsum(&unparsed, skb, vs->flags))
1312 goto drop;
1313 if (vs->flags & VXLAN_F_GBP)
10a5af23 1314 vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md);
3511494c 1315
f14ecebb 1316 if (unparsed.vx_flags || unparsed.vx_vni) {
3bf39475
TH		 1317 /* If there are any unprocessed flags remaining treat
1318 * this as a malformed packet. This behavior diverges from
1319 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1320 * in reserved fields are to be ignored. The approach here
c4b49512 1321 * maintains compatibility with previous stack code, and also
3bf39475
TH		 1322 * is more robust and provides a little more security in
1323 * adding extensions to VXLAN.
1324 */
288b01c8 1325 goto drop;
3bf39475
TH		 1326 }
1327
f2d1968e
JB		 1328 if (!vxlan_set_mac(vxlan, vs, skb))
1329 goto drop;
1330
f2d1968e
JB		 1331 oiph = skb_network_header(skb);
1332 skb_reset_network_header(skb);
1333
1334 if (!vxlan_ecn_decapsulate(vs, oiph, skb)) {
1335 ++vxlan->dev->stats.rx_frame_errors;
1336 ++vxlan->dev->stats.rx_errors;
1337 goto drop;
1338 }
1339
1340 stats = this_cpu_ptr(vxlan->dev->tstats);
1341 u64_stats_update_begin(&stats->syncp);
1342 stats->rx_packets++;
1343 stats->rx_bytes += skb->len;
1344 u64_stats_update_end(&stats->syncp);
1345
1346 gro_cells_receive(&vxlan->gro_cells, skb);
5cfccc5a
PS		 1347 return 0;
1348
1349drop:
288b01c8
JB		 1350 /* Consume bad packet */
1351 kfree_skb(skb);
1352 return 0;
5cfccc5a
PS		 1353}
1354
e4f67add
DS		 1355static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
1356{
1357 struct vxlan_dev *vxlan = netdev_priv(dev);
1358 struct arphdr *parp;
1359 u8 *arpptr, *sha;
1360 __be32 sip, tip;
1361 struct neighbour *n;
1362
1363 if (dev->flags & IFF_NOARP)
1364 goto out;
1365
1366 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1367 dev->stats.tx_dropped++;
1368 goto out;
1369 }
1370 parp = arp_hdr(skb);
1371
1372 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1373 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1374 parp->ar_pro != htons(ETH_P_IP) ||
1375 parp->ar_op != htons(ARPOP_REQUEST) ||
1376 parp->ar_hln != dev->addr_len ||
1377 parp->ar_pln != 4)
1378 goto out;
1379 arpptr = (u8 *)parp + sizeof(struct arphdr);
1380 sha = arpptr;
1381 arpptr += dev->addr_len; /* sha */
1382 memcpy(&sip, arpptr, sizeof(sip));
1383 arpptr += sizeof(sip);
1384 arpptr += dev->addr_len; /* tha */
1385 memcpy(&tip, arpptr, sizeof(tip));
1386
1387 if (ipv4_is_loopback(tip) ||
1388 ipv4_is_multicast(tip))
1389 goto out;
1390
1391 n = neigh_lookup(&arp_tbl, &tip, dev);
1392
1393 if (n) {
e4f67add
DS		 1394 struct vxlan_fdb *f;
1395 struct sk_buff *reply;
1396
1397 if (!(n->nud_state & NUD_CONNECTED)) {
1398 neigh_release(n);
1399 goto out;
1400 }
1401
1402 f = vxlan_find_mac(vxlan, n->ha);
e4c7ed41 1403 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
e4f67add
DS		 1404 /* bridge-local neighbor */
1405 neigh_release(n);
1406 goto out;
1407 }
1408
1409 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1410 n->ha, sha);
1411
1412 neigh_release(n);
1413
7346135d
DS		 1414 if (reply == NULL)
1415 goto out;
1416
e4f67add
DS		 1417 skb_reset_mac_header(reply);
1418 __skb_pull(reply, skb_network_offset(reply));
1419 reply->ip_summed = CHECKSUM_UNNECESSARY;
1420 reply->pkt_type = PACKET_HOST;
1421
1422 if (netif_rx_ni(reply) == NET_RX_DROP)
1423 dev->stats.rx_dropped++;
e4c7ed41
CW		 1424 } else if (vxlan->flags & VXLAN_F_L3MISS) {
1425 union vxlan_addr ipa = {
1426 .sin.sin_addr.s_addr = tip,
a45e92a5 1427 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1428 };
1429
1430 vxlan_ip_miss(dev, &ipa);
1431 }
e4f67add
DS		 1432out:
1433 consume_skb(skb);
1434 return NETDEV_TX_OK;
1435}
1436
f564f45c 1437#if IS_ENABLED(CONFIG_IPV6)
4b29dba9
DS		 1438static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1439 struct neighbour *n, bool isrouter)
1440{
1441 struct net_device *dev = request->dev;
1442 struct sk_buff *reply;
1443 struct nd_msg *ns, *na;
1444 struct ipv6hdr *pip6;
1445 u8 *daddr;
1446 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1447 int ns_olen;
1448 int i, len;
1449
1450 if (dev == NULL)
1451 return NULL;
1452
1453 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1454 sizeof(*na) + na_olen + dev->needed_tailroom;
1455 reply = alloc_skb(len, GFP_ATOMIC);
1456 if (reply == NULL)
1457 return NULL;
1458
1459 reply->protocol = htons(ETH_P_IPV6);
1460 reply->dev = dev;
1461 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1462 skb_push(reply, sizeof(struct ethhdr));
6297b91c 1463 skb_reset_mac_header(reply);
4b29dba9
DS		 1464
1465 ns = (struct nd_msg *)skb_transport_header(request);
1466
1467 daddr = eth_hdr(request)->h_source;
1468 ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns);
1469 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1470 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1471 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1472 break;
1473 }
1474 }
1475
1476 /* Ethernet header */
1477 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1478 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1479 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1480 reply->protocol = htons(ETH_P_IPV6);
1481
1482 skb_pull(reply, sizeof(struct ethhdr));
6297b91c 1483 skb_reset_network_header(reply);
4b29dba9
DS		 1484 skb_put(reply, sizeof(struct ipv6hdr));
1485
1486 /* IPv6 header */
1487
1488 pip6 = ipv6_hdr(reply);
1489 memset(pip6, 0, sizeof(struct ipv6hdr));
1490 pip6->version = 6;
1491 pip6->priority = ipv6_hdr(request)->priority;
1492 pip6->nexthdr = IPPROTO_ICMPV6;
1493 pip6->hop_limit = 255;
1494 pip6->daddr = ipv6_hdr(request)->saddr;
1495 pip6->saddr = *(struct in6_addr *)n->primary_key;
1496
1497 skb_pull(reply, sizeof(struct ipv6hdr));
6297b91c 1498 skb_reset_transport_header(reply);
4b29dba9
DS		 1499
1500 na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen);
1501
1502 /* Neighbor Advertisement */
1503 memset(na, 0, sizeof(*na)+na_olen);
1504 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1505 na->icmph.icmp6_router = isrouter;
1506 na->icmph.icmp6_override = 1;
1507 na->icmph.icmp6_solicited = 1;
1508 na->target = ns->target;
1509 ether_addr_copy(&na->opt[2], n->ha);
1510 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1511 na->opt[1] = na_olen >> 3;
1512
1513 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1514 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1515 csum_partial(na, sizeof(*na)+na_olen, 0));
1516
1517 pip6->payload_len = htons(sizeof(*na)+na_olen);
1518
1519 skb_push(reply, sizeof(struct ipv6hdr));
1520
1521 reply->ip_summed = CHECKSUM_UNNECESSARY;
1522
1523 return reply;
1524}
1525
f564f45c
CW		 1526static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
1527{
1528 struct vxlan_dev *vxlan = netdev_priv(dev);
4b29dba9 1529 struct nd_msg *msg;
f564f45c
CW		 1530 const struct ipv6hdr *iphdr;
1531 const struct in6_addr *saddr, *daddr;
4b29dba9
DS		 1532 struct neighbour *n;
1533 struct inet6_dev *in6_dev;
f564f45c
CW		 1534
1535 in6_dev = __in6_dev_get(dev);
1536 if (!in6_dev)
1537 goto out;
1538
f564f45c
CW		 1539 iphdr = ipv6_hdr(skb);
1540 saddr = &iphdr->saddr;
1541 daddr = &iphdr->daddr;
1542
f564f45c
CW		 1543 msg = (struct nd_msg *)skb_transport_header(skb);
1544 if (msg->icmph.icmp6_code != 0 ||
1545 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1546 goto out;
1547
4b29dba9
DS		 1548 if (ipv6_addr_loopback(daddr) ||
1549 ipv6_addr_is_multicast(&msg->target))
1550 goto out;
1551
1552 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
f564f45c
CW		 1553
1554 if (n) {
1555 struct vxlan_fdb *f;
4b29dba9 1556 struct sk_buff *reply;
f564f45c
CW		 1557
1558 if (!(n->nud_state & NUD_CONNECTED)) {
1559 neigh_release(n);
1560 goto out;
1561 }
1562
1563 f = vxlan_find_mac(vxlan, n->ha);
1564 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1565 /* bridge-local neighbor */
1566 neigh_release(n);
1567 goto out;
1568 }
1569
4b29dba9
DS		 1570 reply = vxlan_na_create(skb, n,
1571 !!(f ? f->flags & NTF_ROUTER : 0));
1572
f564f45c 1573 neigh_release(n);
4b29dba9
DS		 1574
1575 if (reply == NULL)
1576 goto out;
1577
1578 if (netif_rx_ni(reply) == NET_RX_DROP)
1579 dev->stats.rx_dropped++;
1580
f564f45c 1581 } else if (vxlan->flags & VXLAN_F_L3MISS) {
4b29dba9
DS		 1582 union vxlan_addr ipa = {
1583 .sin6.sin6_addr = msg->target,
a45e92a5 1584 .sin6.sin6_family = AF_INET6,
4b29dba9
DS		 1585 };
1586
f564f45c
CW		 1587 vxlan_ip_miss(dev, &ipa);
1588 }
1589
1590out:
1591 consume_skb(skb);
1592 return NETDEV_TX_OK;
1593}
1594#endif
1595
e4f67add
DS		 1596static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1597{
1598 struct vxlan_dev *vxlan = netdev_priv(dev);
1599 struct neighbour *n;
e4f67add
DS		 1600
1601 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1602 return false;
1603
1604 n = NULL;
1605 switch (ntohs(eth_hdr(skb)->h_proto)) {
1606 case ETH_P_IP:
e15a00aa
CW		 1607 {
1608 struct iphdr *pip;
1609
e4f67add
DS		 1610 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1611 return false;
1612 pip = ip_hdr(skb);
1613 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
e4c7ed41
CW		 1614 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1615 union vxlan_addr ipa = {
1616 .sin.sin_addr.s_addr = pip->daddr,
a45e92a5 1617 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1618 };
1619
1620 vxlan_ip_miss(dev, &ipa);
1621 return false;
1622 }
1623
e4f67add 1624 break;
e15a00aa
CW		 1625 }
1626#if IS_ENABLED(CONFIG_IPV6)
1627 case ETH_P_IPV6:
1628 {
1629 struct ipv6hdr *pip6;
1630
1631 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1632 return false;
1633 pip6 = ipv6_hdr(skb);
1634 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
1635 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1636 union vxlan_addr ipa = {
1637 .sin6.sin6_addr = pip6->daddr,
a45e92a5 1638 .sin6.sin6_family = AF_INET6,
e15a00aa
CW		 1639 };
1640
1641 vxlan_ip_miss(dev, &ipa);
1642 return false;
1643 }
1644
1645 break;
1646 }
1647#endif
e4f67add
DS		 1648 default:
1649 return false;
1650 }
1651
1652 if (n) {
1653 bool diff;
1654
7367d0b5 1655 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
e4f67add
DS		 1656 if (diff) {
1657 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1658 dev->addr_len);
1659 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1660 }
1661 neigh_release(n);
1662 return diff;
e4c7ed41
CW		 1663 }
1664
e4f67add
DS		 1665 return false;
1666}
1667
af33c1ad 1668static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
3511494c
TG		 1669 struct vxlan_metadata *md)
1670{
1671 struct vxlanhdr_gbp *gbp;
1672
db79a621
TG		 1673 if (!md->gbp)
1674 return;
1675
3511494c 1676 gbp = (struct vxlanhdr_gbp *)vxh;
54bfd872 1677 vxh->vx_flags |= VXLAN_HF_GBP;
3511494c
TG		 1678
1679 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1680 gbp->dont_learn = 1;
1681
1682 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1683 gbp->policy_applied = 1;
1684
1685 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1686}
1687
f491e56d
JB		 1688static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
1689 int iphdr_len, __be32 vni,
1690 struct vxlan_metadata *md, u32 vxflags,
b4ed5cad 1691 bool udp_sum)
e4c7ed41 1692{
e4c7ed41 1693 struct vxlanhdr *vxh;
e4c7ed41
CW		 1694 int min_headroom;
1695 int err;
dfd8645e 1696 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
dfd8645e 1697
af33c1ad 1698 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1699 skb->ip_summed == CHECKSUM_PARTIAL) {
1700 int csum_start = skb_checksum_start_offset(skb);
1701
1702 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1703 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1704 (skb->csum_offset == offsetof(struct udphdr, check) ||
b5708501 1705 skb->csum_offset == offsetof(struct tcphdr, check)))
dfd8645e 1706 type |= SKB_GSO_TUNNEL_REMCSUM;
dfd8645e 1707 }
e4c7ed41 1708
e4c7ed41 1709 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
f491e56d 1710 + VXLAN_HLEN + iphdr_len
df8a39de 1711 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
649c5b8b
PS		 1712
1713 /* Need space for new headers (invalidates iph ptr) */
1714 err = skb_cow_head(skb, min_headroom);
74f47278
PS		 1715 if (unlikely(err)) {
1716 kfree_skb(skb);
649c5b8b 1717 return err;
74f47278 1718 }
649c5b8b 1719
5968250c
JP		 1720 skb = vlan_hwaccel_push_inside(skb);
1721 if (WARN_ON(!skb))
1722 return -ENOMEM;
1eaa8178 1723
6fa79666 1724 skb = iptunnel_handle_offloads(skb, type);
b736a623
JG		 1725 if (IS_ERR(skb))
1726 return PTR_ERR(skb);
1727
49560532 1728 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
54bfd872
JB		 1729 vxh->vx_flags = VXLAN_HF_VNI;
1730 vxh->vx_vni = vxlan_vni_field(vni);
49560532 1731
dfd8645e 1732 if (type & SKB_GSO_TUNNEL_REMCSUM) {
54bfd872 1733 unsigned int start;
dfd8645e 1734
54bfd872
JB		 1735 start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr);
1736 vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset);
1737 vxh->vx_flags |= VXLAN_HF_RCO;
dfd8645e
TH		 1738
1739 if (!skb_is_gso(skb)) {
1740 skb->ip_summed = CHECKSUM_NONE;
1741 skb->encapsulation = 0;
1742 }
1743 }
1744
af33c1ad
TH		 1745 if (vxflags & VXLAN_F_GBP)
1746 vxlan_build_gbp_hdr(vxh, vxflags, md);
3511494c 1747
996c9fd1 1748 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
039f5062 1749 return 0;
49560532 1750}
49560532 1751
1a8496ba
JB		 1752static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan,
1753 struct sk_buff *skb, int oif, u8 tos,
0c1d70af
PA		 1754 __be32 daddr, __be32 *saddr,
1755 struct dst_cache *dst_cache,
1756 struct ip_tunnel_info *info)
1a8496ba
JB		 1757{
1758 struct rtable *rt = NULL;
0c1d70af 1759 bool use_cache = false;
1a8496ba
JB		 1760 struct flowi4 fl4;
1761
0c1d70af
PA		 1762 /* when the ip_tunnel_info is availble, the tos used for lookup is
1763 * packet independent, so we can use the cache
1764 */
d71785ff 1765 if (!skb->mark && (!tos || info)) {
0c1d70af
PA		 1766 use_cache = true;
1767 rt = dst_cache_get_ip4(dst_cache, saddr);
1768 if (rt)
1769 return rt;
1770 }
1771
1a8496ba
JB		 1772 memset(&fl4, 0, sizeof(fl4));
1773 fl4.flowi4_oif = oif;
1774 fl4.flowi4_tos = RT_TOS(tos);
1775 fl4.flowi4_mark = skb->mark;
1776 fl4.flowi4_proto = IPPROTO_UDP;
1777 fl4.daddr = daddr;
1778 fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr;
1779
1780 rt = ip_route_output_key(vxlan->net, &fl4);
0c1d70af 1781 if (!IS_ERR(rt)) {
1a8496ba 1782 *saddr = fl4.saddr;
0c1d70af
PA		 1783 if (use_cache)
1784 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
1785 }
1a8496ba
JB		 1786 return rt;
1787}
1788
e5d4b29f
JB		 1789#if IS_ENABLED(CONFIG_IPV6)
1790static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
1791 struct sk_buff *skb, int oif,
1792 const struct in6_addr *daddr,
0c1d70af
PA		 1793 struct in6_addr *saddr,
1794 struct dst_cache *dst_cache)
e5d4b29f
JB		 1795{
1796 struct dst_entry *ndst;
1797 struct flowi6 fl6;
1798 int err;
1799
d71785ff 1800 if (!skb->mark) {
0c1d70af
PA		 1801 ndst = dst_cache_get_ip6(dst_cache, saddr);
1802 if (ndst)
1803 return ndst;
1804 }
1805
e5d4b29f
JB		 1806 memset(&fl6, 0, sizeof(fl6));
1807 fl6.flowi6_oif = oif;
1808 fl6.daddr = *daddr;
1809 fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr;
1810 fl6.flowi6_mark = skb->mark;
1811 fl6.flowi6_proto = IPPROTO_UDP;
1812
1813 err = ipv6_stub->ipv6_dst_lookup(vxlan->net,
1814 vxlan->vn6_sock->sock->sk,
1815 &ndst, &fl6);
1816 if (err < 0)
1817 return ERR_PTR(err);
1818
1819 *saddr = fl6.saddr;
d71785ff 1820 if (!skb->mark)
0c1d70af 1821 dst_cache_set_ip6(dst_cache, ndst, saddr);
e5d4b29f
JB		 1822 return ndst;
1823}
1824#endif
1825
9dcc71e1
SS		 1826/* Bypass encapsulation if the destination is local */
1827static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
1828 struct vxlan_dev *dst_vxlan)
1829{
8f84985f 1830 struct pcpu_sw_netstats *tx_stats, *rx_stats;
e4c7ed41
CW		 1831 union vxlan_addr loopback;
1832 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
ce6502a8
LR		 1833 struct net_device *dev = skb->dev;
1834 int len = skb->len;
9dcc71e1 1835
8f84985f
LR		 1836 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
1837 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
9dcc71e1
SS		 1838 skb->pkt_type = PACKET_HOST;
1839 skb->encapsulation = 0;
1840 skb->dev = dst_vxlan->dev;
1841 __skb_pull(skb, skb_network_offset(skb));
1842
e4c7ed41
CW		 1843 if (remote_ip->sa.sa_family == AF_INET) {
1844 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1845 loopback.sa.sa_family = AF_INET;
1846#if IS_ENABLED(CONFIG_IPV6)
1847 } else {
1848 loopback.sin6.sin6_addr = in6addr_loopback;
1849 loopback.sa.sa_family = AF_INET6;
1850#endif
1851 }
1852
9dcc71e1 1853 if (dst_vxlan->flags & VXLAN_F_LEARN)
e4c7ed41 1854 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
9dcc71e1
SS		 1855
1856 u64_stats_update_begin(&tx_stats->syncp);
1857 tx_stats->tx_packets++;
ce6502a8 1858 tx_stats->tx_bytes += len;
9dcc71e1
SS		 1859 u64_stats_update_end(&tx_stats->syncp);
1860
1861 if (netif_rx(skb) == NET_RX_SUCCESS) {
1862 u64_stats_update_begin(&rx_stats->syncp);
1863 rx_stats->rx_packets++;
ce6502a8 1864 rx_stats->rx_bytes += len;
9dcc71e1
SS		 1865 u64_stats_update_end(&rx_stats->syncp);
1866 } else {
ce6502a8 1867 dev->stats.rx_dropped++;
9dcc71e1
SS		 1868 }
1869}
1870
4ad16930
SH		 1871static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
1872 struct vxlan_rdst *rdst, bool did_rsc)
d342894c 1873{
d71785ff 1874 struct dst_cache *dst_cache;
3093fbe7 1875 struct ip_tunnel_info *info;
d342894c 1876 struct vxlan_dev *vxlan = netdev_priv(dev);
b1be00a6 1877 struct sock *sk;
e4c7ed41 1878 struct rtable *rt = NULL;
d342894c 1879 const struct iphdr *old_iph;
e4c7ed41 1880 union vxlan_addr *dst;
ee122c79
TG		 1881 union vxlan_addr remote_ip;
1882 struct vxlan_metadata _md;
1883 struct vxlan_metadata *md = &_md;
e4c7ed41 1884 __be16 src_port = 0, dst_port;
54bfd872 1885 __be32 vni;
d342894c 1886 __be16 df = 0;
1887 __u8 tos, ttl;
0e6fbc5b 1888 int err;
ee122c79 1889 u32 flags = vxlan->flags;
b4ed5cad 1890 bool udp_sum = false;
f491e56d 1891 bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
d342894c 1892
61adedf3 1893 info = skb_tunnel_info(skb);
3093fbe7 1894
ee122c79 1895 if (rdst) {
0dfbdf41 1896 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
ee122c79
TG		 1897 vni = rdst->remote_vni;
1898 dst = &rdst->remote_ip;
d71785ff 1899 dst_cache = &rdst->dst_cache;
ee122c79
TG		 1900 } else {
1901 if (!info) {
1902 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1903 dev->name);
1904 goto drop;
1905 }
0dfbdf41 1906 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
54bfd872 1907 vni = vxlan_tun_id_to_vni(info->key.tun_id);
b1be00a6
JB		 1908 remote_ip.sa.sa_family = ip_tunnel_info_af(info);
1909 if (remote_ip.sa.sa_family == AF_INET)
a725e514
JB		 1910 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
1911 else
1912 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
ee122c79 1913 dst = &remote_ip;
d71785ff 1914 dst_cache = &info->dst_cache;
ee122c79 1915 }
e4f67add 1916
e4c7ed41 1917 if (vxlan_addr_any(dst)) {
e4f67add 1918 if (did_rsc) {
e4f67add 1919 /* short-circuited back to local bridge */
9dcc71e1 1920 vxlan_encap_bypass(skb, vxlan, vxlan);
4ad16930 1921 return;
e4f67add 1922 }
ef59febe 1923 goto drop;
e4f67add 1924 }
ef59febe 1925
d342894c 1926 old_iph = ip_hdr(skb);
1927
0dfbdf41 1928 ttl = vxlan->cfg.ttl;
e4c7ed41 1929 if (!ttl && vxlan_addr_multicast(dst))
d342894c 1930 ttl = 1;
1931
0dfbdf41 1932 tos = vxlan->cfg.tos;
d342894c 1933 if (tos == 1)
206aaafc 1934 tos = ip_tunnel_get_dsfield(old_iph, skb);
d342894c 1935
0dfbdf41
TG		 1936 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
1937 vxlan->cfg.port_max, true);
d342894c 1938
a725e514 1939 if (info) {
a725e514
JB		 1940 ttl = info->key.ttl;
1941 tos = info->key.tos;
b4ed5cad 1942 udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
a725e514
JB		 1943
1944 if (info->options_len)
4c222798 1945 md = ip_tunnel_info_opts(info);
a725e514
JB		 1946 } else {
1947 md->gbp = skb->mark;
1948 }
1949
e4c7ed41 1950 if (dst->sa.sa_family == AF_INET) {
1a8496ba
JB		 1951 __be32 saddr;
1952
b1be00a6
JB		 1953 if (!vxlan->vn4_sock)
1954 goto drop;
1955 sk = vxlan->vn4_sock->sock->sk;
1956
1a8496ba
JB		 1957 rt = vxlan_get_route(vxlan, skb,
1958 rdst ? rdst->remote_ifindex : 0, tos,
0c1d70af 1959 dst->sin.sin_addr.s_addr, &saddr,
d71785ff 1960 dst_cache, info);
e4c7ed41
CW		 1961 if (IS_ERR(rt)) {
1962 netdev_dbg(dev, "no route to %pI4\n",
1963 &dst->sin.sin_addr.s_addr);
1964 dev->stats.tx_carrier_errors++;
1965 goto tx_error;
1966 }
d342894c 1967
e4c7ed41
CW		 1968 if (rt->dst.dev == dev) {
1969 netdev_dbg(dev, "circular route to %pI4\n",
1970 &dst->sin.sin_addr.s_addr);
1971 dev->stats.collisions++;
fffc15a5 1972 goto rt_tx_error;
e4c7ed41
CW		 1973 }
1974
1975 /* Bypass encapsulation if the destination is local */
1976 if (rt->rt_flags & RTCF_LOCAL &&
1977 !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
1978 struct vxlan_dev *dst_vxlan;
1979
1980 ip_rt_put(rt);
19ca9fc1 1981 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 1982 dst->sa.sa_family, dst_port,
1983 vxlan->flags);
e4c7ed41
CW		 1984 if (!dst_vxlan)
1985 goto tx_error;
1986 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
1987 return;
1988 }
1989
6ceb31ca
AD		 1990 if (!info)
1991 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
1992 else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)
1993 df = htons(IP_DF);
1994
e4c7ed41
CW		 1995 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
1996 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
f491e56d 1997 err = vxlan_build_skb(skb, &rt->dst, sizeof(struct iphdr),
54bfd872 1998 vni, md, flags, udp_sum);
f491e56d
JB		 1999 if (err < 0)
2000 goto xmit_tx_error;
2001
2002 udp_tunnel_xmit_skb(rt, sk, skb, saddr,
2003 dst->sin.sin_addr.s_addr, tos, ttl, df,
2004 src_port, dst_port, xnet, !udp_sum);
e4c7ed41
CW		 2005#if IS_ENABLED(CONFIG_IPV6)
2006 } else {
e4c7ed41 2007 struct dst_entry *ndst;
e5d4b29f 2008 struct in6_addr saddr;
6f264e47 2009 u32 rt6i_flags;
e4c7ed41 2010
b1be00a6
JB		 2011 if (!vxlan->vn6_sock)
2012 goto drop;
2013 sk = vxlan->vn6_sock->sock->sk;
2014
e5d4b29f
JB		 2015 ndst = vxlan6_get_route(vxlan, skb,
2016 rdst ? rdst->remote_ifindex : 0,
0c1d70af 2017 &dst->sin6.sin6_addr, &saddr,
d71785ff 2018 dst_cache);
e5d4b29f 2019 if (IS_ERR(ndst)) {
e4c7ed41
CW		 2020 netdev_dbg(dev, "no route to %pI6\n",
2021 &dst->sin6.sin6_addr);
2022 dev->stats.tx_carrier_errors++;
9dcc71e1 2023 goto tx_error;
e4c7ed41 2024 }
d342894c 2025
e4c7ed41
CW		 2026 if (ndst->dev == dev) {
2027 netdev_dbg(dev, "circular route to %pI6\n",
2028 &dst->sin6.sin6_addr);
2029 dst_release(ndst);
2030 dev->stats.collisions++;
2031 goto tx_error;
2032 }
0e6fbc5b 2033
e4c7ed41 2034 /* Bypass encapsulation if the destination is local */
6f264e47
JB		 2035 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
2036 if (rt6i_flags & RTF_LOCAL &&
2037 !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
e4c7ed41
CW		 2038 struct vxlan_dev *dst_vxlan;
2039
2040 dst_release(ndst);
19ca9fc1 2041 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 2042 dst->sa.sa_family, dst_port,
2043 vxlan->flags);
e4c7ed41
CW		 2044 if (!dst_vxlan)
2045 goto tx_error;
2046 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2047 return;
2048 }
49560532 2049
b4ed5cad
JB		 2050 if (!info)
2051 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
35e2d115 2052
e4c7ed41 2053 ttl = ttl ? : ip6_dst_hoplimit(ndst);
f491e56d
JB		 2054 skb_scrub_packet(skb, xnet);
2055 err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
54bfd872 2056 vni, md, flags, udp_sum);
f491e56d
JB		 2057 if (err < 0) {
2058 dst_release(ndst);
2059 return;
2060 }
2061 udp_tunnel6_xmit_skb(ndst, sk, skb, dev,
2062 &saddr, &dst->sin6.sin6_addr,
2063 0, ttl, src_port, dst_port, !udp_sum);
e4c7ed41
CW		 2064#endif
2065 }
0e6fbc5b 2066
4ad16930 2067 return;
d342894c 2068
2069drop:
2070 dev->stats.tx_dropped++;
2071 goto tx_free;
2072
f491e56d
JB		 2073xmit_tx_error:
2074 /* skb is already freed. */
2075 skb = NULL;
49560532
PS		 2076rt_tx_error:
2077 ip_rt_put(rt);
d342894c 2078tx_error:
2079 dev->stats.tx_errors++;
2080tx_free:
2081 dev_kfree_skb(skb);
d342894c 2082}
2083
6681712d
DS		 2084/* Transmit local packets over Vxlan
2085 *
2086 * Outer IP header inherits ECN and DF from inner header.
2087 * Outer UDP destination is the VXLAN assigned port.
2088 * source port is based on hash of flow
2089 */
2090static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2091{
2092 struct vxlan_dev *vxlan = netdev_priv(dev);
3093fbe7 2093 const struct ip_tunnel_info *info;
6681712d
DS		 2094 struct ethhdr *eth;
2095 bool did_rsc = false;
8f646c92 2096 struct vxlan_rdst *rdst, *fdst = NULL;
6681712d 2097 struct vxlan_fdb *f;
6681712d 2098
61adedf3 2099 info = skb_tunnel_info(skb);
3093fbe7 2100
6681712d
DS		 2101 skb_reset_mac_header(skb);
2102 eth = eth_hdr(skb);
2103
f564f45c
CW		 2104 if ((vxlan->flags & VXLAN_F_PROXY)) {
2105 if (ntohs(eth->h_proto) == ETH_P_ARP)
2106 return arp_reduce(dev, skb);
2107#if IS_ENABLED(CONFIG_IPV6)
2108 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
91269e39
LR		 2109 pskb_may_pull(skb, sizeof(struct ipv6hdr)
2110 + sizeof(struct nd_msg)) &&
f564f45c
CW		 2111 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2112 struct nd_msg *msg;
2113
2114 msg = (struct nd_msg *)skb_transport_header(skb);
2115 if (msg->icmph.icmp6_code == 0 &&
2116 msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
2117 return neigh_reduce(dev, skb);
2118 }
7a9f526f 2119 eth = eth_hdr(skb);
f564f45c
CW		 2120#endif
2121 }
6681712d 2122
f468a729
JB		 2123 if (vxlan->flags & VXLAN_F_COLLECT_METADATA) {
2124 if (info && info->mode & IP_TUNNEL_INFO_TX)
2125 vxlan_xmit_one(skb, dev, NULL, false);
2126 else
2127 kfree_skb(skb);
ee122c79
TG		 2128 return NETDEV_TX_OK;
2129 }
2130
6681712d 2131 f = vxlan_find_mac(vxlan, eth->h_dest);
ae884082
DS		 2132 did_rsc = false;
2133
2134 if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) &&
e15a00aa
CW		 2135 (ntohs(eth->h_proto) == ETH_P_IP ||
2136 ntohs(eth->h_proto) == ETH_P_IPV6)) {
ae884082
DS		 2137 did_rsc = route_shortcircuit(dev, skb);
2138 if (did_rsc)
2139 f = vxlan_find_mac(vxlan, eth->h_dest);
2140 }
2141
6681712d 2142 if (f == NULL) {
afbd8bae
MR		 2143 f = vxlan_find_mac(vxlan, all_zeros_mac);
2144 if (f == NULL) {
2145 if ((vxlan->flags & VXLAN_F_L2MISS) &&
2146 !is_multicast_ether_addr(eth->h_dest))
2147 vxlan_fdb_miss(vxlan, eth->h_dest);
2148
2149 dev->stats.tx_dropped++;
8f646c92 2150 kfree_skb(skb);
afbd8bae
MR		 2151 return NETDEV_TX_OK;
2152 }
2153 }
6681712d 2154
afbd8bae
MR		 2155 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2156 struct sk_buff *skb1;
6681712d 2157
8f646c92
ED		 2158 if (!fdst) {
2159 fdst = rdst;
2160 continue;
2161 }
afbd8bae
MR		 2162 skb1 = skb_clone(skb, GFP_ATOMIC);
2163 if (skb1)
2164 vxlan_xmit_one(skb1, dev, rdst, did_rsc);
6681712d
DS		 2165 }
2166
8f646c92
ED		 2167 if (fdst)
2168 vxlan_xmit_one(skb, dev, fdst, did_rsc);
2169 else
2170 kfree_skb(skb);
4ad16930 2171 return NETDEV_TX_OK;
6681712d
DS		 2172}
2173
d342894c 2174/* Walk the forwarding table and purge stale entries */
2175static void vxlan_cleanup(unsigned long arg)
2176{
2177 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
2178 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2179 unsigned int h;
2180
2181 if (!netif_running(vxlan->dev))
2182 return;
2183
d342894c 2184 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2185 struct hlist_node *p, *n;
14e1d0fa
SD		 2186
2187 spin_lock_bh(&vxlan->hash_lock);
d342894c 2188 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2189 struct vxlan_fdb *f
2190 = container_of(p, struct vxlan_fdb, hlist);
2191 unsigned long timeout;
2192
3c172868 2193 if (f->state & NUD_PERMANENT)
d342894c 2194 continue;
2195
0dfbdf41 2196 timeout = f->used + vxlan->cfg.age_interval * HZ;
d342894c 2197 if (time_before_eq(timeout, jiffies)) {
2198 netdev_dbg(vxlan->dev,
2199 "garbage collect %pM\n",
2200 f->eth_addr);
2201 f->state = NUD_STALE;
2202 vxlan_fdb_destroy(vxlan, f);
2203 } else if (time_before(timeout, next_timer))
2204 next_timer = timeout;
2205 }
14e1d0fa 2206 spin_unlock_bh(&vxlan->hash_lock);
d342894c 2207 }
d342894c 2208
2209 mod_timer(&vxlan->age_timer, next_timer);
2210}
2211
9c2e24e1
PS		 2212static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
2213{
56ef9c90 2214 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
54bfd872 2215 __be32 vni = vxlan->default_dst.remote_vni;
9c2e24e1 2216
56ef9c90 2217 spin_lock(&vn->sock_lock);
9c2e24e1 2218 hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
56ef9c90 2219 spin_unlock(&vn->sock_lock);
9c2e24e1
PS		 2220}
2221
d342894c 2222/* Setup stats when device is created */
2223static int vxlan_init(struct net_device *dev)
2224{
1c213bd2 2225 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
e8171045 2226 if (!dev->tstats)
d342894c 2227 return -ENOMEM;
2228
2229 return 0;
2230}
2231
ba609e9b 2232static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan)
afbd8bae
MR		 2233{
2234 struct vxlan_fdb *f;
2235
2236 spin_lock_bh(&vxlan->hash_lock);
2237 f = __vxlan_find_mac(vxlan, all_zeros_mac);
2238 if (f)
2239 vxlan_fdb_destroy(vxlan, f);
2240 spin_unlock_bh(&vxlan->hash_lock);
2241}
2242
ebf4063e
SH		 2243static void vxlan_uninit(struct net_device *dev)
2244{
2245 struct vxlan_dev *vxlan = netdev_priv(dev);
ebf4063e 2246
ba609e9b 2247 vxlan_fdb_delete_default(vxlan);
afbd8bae 2248
ebf4063e
SH		 2249 free_percpu(dev->tstats);
2250}
2251
d342894c 2252/* Start ageing timer and join group when device is brought up */
2253static int vxlan_open(struct net_device *dev)
2254{
2255 struct vxlan_dev *vxlan = netdev_priv(dev);
205f356d 2256 int ret;
56ef9c90 2257
205f356d
JB		 2258 ret = vxlan_sock_add(vxlan);
2259 if (ret < 0)
2260 return ret;
d342894c 2261
79d4a94f 2262 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
56ef9c90 2263 ret = vxlan_igmp_join(vxlan);
bef0057b
MRL		 2264 if (ret == -EADDRINUSE)
2265 ret = 0;
56ef9c90 2266 if (ret) {
205f356d 2267 vxlan_sock_release(vxlan);
56ef9c90
MRL		 2268 return ret;
2269 }
d342894c 2270 }
2271
0dfbdf41 2272 if (vxlan->cfg.age_interval)
d342894c 2273 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2274
56ef9c90 2275 return ret;
d342894c 2276}
2277
2278/* Purge the forwarding table */
2279static void vxlan_flush(struct vxlan_dev *vxlan)
2280{
31fec5aa 2281 unsigned int h;
d342894c 2282
2283 spin_lock_bh(&vxlan->hash_lock);
2284 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2285 struct hlist_node *p, *n;
2286 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2287 struct vxlan_fdb *f
2288 = container_of(p, struct vxlan_fdb, hlist);
afbd8bae
MR		 2289 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2290 if (!is_zero_ether_addr(f->eth_addr))
2291 vxlan_fdb_destroy(vxlan, f);
d342894c 2292 }
2293 }
2294 spin_unlock_bh(&vxlan->hash_lock);
2295}
2296
2297/* Cleanup timer and forwarding table on shutdown */
2298static int vxlan_stop(struct net_device *dev)
2299{
2300 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2301 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
56ef9c90 2302 int ret = 0;
d342894c 2303
24c0e683 2304 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
f13b1689 2305 !vxlan_group_used(vn, vxlan))
56ef9c90 2306 ret = vxlan_igmp_leave(vxlan);
d342894c 2307
2308 del_timer_sync(&vxlan->age_timer);
2309
2310 vxlan_flush(vxlan);
205f356d 2311 vxlan_sock_release(vxlan);
d342894c 2312
56ef9c90 2313 return ret;
d342894c 2314}
2315
d342894c 2316/* Stub, nothing needs to be done. */
2317static void vxlan_set_multicast_list(struct net_device *dev)
2318{
2319}
2320
72564b59
DW		 2321static int __vxlan_change_mtu(struct net_device *dev,
2322 struct net_device *lowerdev,
2323 struct vxlan_rdst *dst, int new_mtu, bool strict)
345010b5 2324{
72564b59 2325 int max_mtu = IP_MAX_MTU;
345010b5 2326
72564b59
DW		 2327 if (lowerdev)
2328 max_mtu = lowerdev->mtu;
345010b5
DB		 2329
2330 if (dst->remote_ip.sa.sa_family == AF_INET6)
72564b59 2331 max_mtu -= VXLAN6_HEADROOM;
345010b5 2332 else
72564b59 2333 max_mtu -= VXLAN_HEADROOM;
345010b5 2334
72564b59 2335 if (new_mtu < 68)
345010b5
DB		 2336 return -EINVAL;
2337
72564b59
DW		 2338 if (new_mtu > max_mtu) {
2339 if (strict)
2340 return -EINVAL;
2341
2342 new_mtu = max_mtu;
2343 }
2344
345010b5
DB		 2345 dev->mtu = new_mtu;
2346 return 0;
2347}
2348
72564b59
DW		 2349static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2350{
2351 struct vxlan_dev *vxlan = netdev_priv(dev);
2352 struct vxlan_rdst *dst = &vxlan->default_dst;
2353 struct net_device *lowerdev = __dev_get_by_index(vxlan->net,
2354 dst->remote_ifindex);
2355 return __vxlan_change_mtu(dev, lowerdev, dst, new_mtu, true);
2356}
2357
fc4099f1
PS		 2358static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
2359{
2360 struct vxlan_dev *vxlan = netdev_priv(dev);
2361 struct ip_tunnel_info *info = skb_tunnel_info(skb);
2362 __be16 sport, dport;
2363
2364 sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2365 vxlan->cfg.port_max, true);
2366 dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
2367
239e944f 2368 if (ip_tunnel_info_af(info) == AF_INET) {
1a8496ba
JB		 2369 struct rtable *rt;
2370
239e944f
JB		 2371 if (!vxlan->vn4_sock)
2372 return -EINVAL;
1a8496ba
JB		 2373 rt = vxlan_get_route(vxlan, skb, 0, info->key.tos,
2374 info->key.u.ipv4.dst,
0c1d70af 2375 &info->key.u.ipv4.src, NULL, info);
1a8496ba
JB		 2376 if (IS_ERR(rt))
2377 return PTR_ERR(rt);
2378 ip_rt_put(rt);
239e944f
JB		 2379 } else {
2380#if IS_ENABLED(CONFIG_IPV6)
2381 struct dst_entry *ndst;
2382
2383 if (!vxlan->vn6_sock)
2384 return -EINVAL;
2385 ndst = vxlan6_get_route(vxlan, skb, 0,
2386 &info->key.u.ipv6.dst,
0c1d70af 2387 &info->key.u.ipv6.src, NULL);
239e944f
JB		 2388 if (IS_ERR(ndst))
2389 return PTR_ERR(ndst);
2390 dst_release(ndst);
239e944f
JB		 2391#else /* !CONFIG_IPV6 */
2392 return -EPFNOSUPPORT;
2393#endif
2394 }
1a8496ba
JB		 2395 info->key.tp_src = sport;
2396 info->key.tp_dst = dport;
239e944f 2397 return 0;
fc4099f1
PS		 2398}
2399
d342894c 2400static const struct net_device_ops vxlan_netdev_ops = {
2401 .ndo_init = vxlan_init,
ebf4063e 2402 .ndo_uninit = vxlan_uninit,
d342894c 2403 .ndo_open = vxlan_open,
2404 .ndo_stop = vxlan_stop,
2405 .ndo_start_xmit = vxlan_xmit,
e8171045 2406 .ndo_get_stats64 = ip_tunnel_get_stats64,
d342894c 2407 .ndo_set_rx_mode = vxlan_set_multicast_list,
345010b5 2408 .ndo_change_mtu = vxlan_change_mtu,
d342894c 2409 .ndo_validate_addr = eth_validate_addr,
2410 .ndo_set_mac_address = eth_mac_addr,
2411 .ndo_fdb_add = vxlan_fdb_add,
2412 .ndo_fdb_del = vxlan_fdb_delete,
2413 .ndo_fdb_dump = vxlan_fdb_dump,
fc4099f1 2414 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
d342894c 2415};
2416
2417/* Info for udev, that this is a virtual tunnel endpoint */
2418static struct device_type vxlan_type = {
2419 .name = "vxlan",
2420};
2421
53cf5275 2422/* Calls the ndo_add_vxlan_port of the caller in order to
35e42379
JG		 2423 * supply the listening VXLAN udp ports. Callers are expected
2424 * to implement the ndo_add_vxlan_port.
53cf5275
JG		 2425 */
2426void vxlan_get_rx_port(struct net_device *dev)
2427{
2428 struct vxlan_sock *vs;
2429 struct net *net = dev_net(dev);
2430 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2431 sa_family_t sa_family;
35e42379
JG		 2432 __be16 port;
2433 unsigned int i;
53cf5275
JG		 2434
2435 spin_lock(&vn->sock_lock);
2436 for (i = 0; i < PORT_HASH_SIZE; ++i) {
35e42379
JG		 2437 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2438 port = inet_sk(vs->sock->sk)->inet_sport;
705cc62f 2439 sa_family = vxlan_get_sk_family(vs);
53cf5275
JG		 2440 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
2441 port);
2442 }
2443 }
2444 spin_unlock(&vn->sock_lock);
2445}
2446EXPORT_SYMBOL_GPL(vxlan_get_rx_port);
2447
d342894c 2448/* Initialize the device structure. */
2449static void vxlan_setup(struct net_device *dev)
2450{
2451 struct vxlan_dev *vxlan = netdev_priv(dev);
31fec5aa 2452 unsigned int h;
d342894c 2453
2454 eth_hw_addr_random(dev);
2455 ether_setup(dev);
2456
2457 dev->netdev_ops = &vxlan_netdev_ops;
ebf4063e 2458 dev->destructor = free_netdev;
d342894c 2459 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2460
d342894c 2461 dev->features |= NETIF_F_LLTX;
d6727fe3 2462 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
0afb1666 2463 dev->features |= NETIF_F_RXCSUM;
05c0db08 2464 dev->features |= NETIF_F_GSO_SOFTWARE;
0afb1666 2465
1eaa8178
PS		 2466 dev->vlan_features = dev->features;
2467 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
0afb1666 2468 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
05c0db08 2469 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1eaa8178 2470 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
02875878 2471 netif_keep_dst(dev);
82a0f6b4 2472 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
22dba393 2473 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
d342894c 2474
553675fb 2475 INIT_LIST_HEAD(&vxlan->next);
d342894c 2476 spin_lock_init(&vxlan->hash_lock);
2477
2478 init_timer_deferrable(&vxlan->age_timer);
2479 vxlan->age_timer.function = vxlan_cleanup;
2480 vxlan->age_timer.data = (unsigned long) vxlan;
2481
0dfbdf41 2482 vxlan->cfg.dst_port = htons(vxlan_port);
05f47d69 2483
d342894c 2484 vxlan->dev = dev;
2485
58ce31cc
TH		 2486 gro_cells_init(&vxlan->gro_cells, dev);
2487
d342894c 2488 for (h = 0; h < FDB_HASH_SIZE; ++h)
2489 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2490}
2491
2492static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2493 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
5d174dd8 2494 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
e4c7ed41 2495 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
d342894c 2496 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2497 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
e4c7ed41 2498 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
d342894c 2499 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2500 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
2501 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2502 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2503 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
05f47d69 2504 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
e4f67add
DS		 2505 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2506 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2507 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2508 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
f8a9b1bc 2509 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
823aa873 2510 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
5c91ae08
TH		 2511 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2512 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2513 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
dfd8645e
TH		 2514 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2515 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
3511494c 2516 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
0ace2ca8 2517 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
d342894c 2518};
2519
2520static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
2521{
2522 if (tb[IFLA_ADDRESS]) {
2523 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2524 pr_debug("invalid link address (not ethernet)\n");
2525 return -EINVAL;
2526 }
2527
2528 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2529 pr_debug("invalid all zero ethernet address\n");
2530 return -EADDRNOTAVAIL;
2531 }
2532 }
2533
2534 if (!data)
2535 return -EINVAL;
2536
2537 if (data[IFLA_VXLAN_ID]) {
2538 __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2539 if (id >= VXLAN_VID_MASK)
2540 return -ERANGE;
2541 }
2542
05f47d69 2543 if (data[IFLA_VXLAN_PORT_RANGE]) {
2544 const struct ifla_vxlan_port_range *p
2545 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2546
2547 if (ntohs(p->high) < ntohs(p->low)) {
2548 pr_debug("port range %u .. %u not valid\n",
2549 ntohs(p->low), ntohs(p->high));
2550 return -EINVAL;
2551 }
2552 }
2553
d342894c 2554 return 0;
2555}
2556
1b13c97f
YB		 2557static void vxlan_get_drvinfo(struct net_device *netdev,
2558 struct ethtool_drvinfo *drvinfo)
2559{
2560 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2561 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2562}
2563
2564static const struct ethtool_ops vxlan_ethtool_ops = {
2565 .get_drvinfo = vxlan_get_drvinfo,
2566 .get_link = ethtool_op_get_link,
2567};
2568
553675fb 2569static void vxlan_del_work(struct work_struct *work)
2570{
2571 struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
acbf74a7 2572 udp_tunnel_sock_release(vs->sock);
553675fb 2573 kfree_rcu(vs, rcu);
2574}
2575
3ee64f39
TH		 2576static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2577 __be16 port, u32 flags)
553675fb 2578{
e4c7ed41 2579 struct socket *sock;
3ee64f39
TH		 2580 struct udp_port_cfg udp_conf;
2581 int err;
e4c7ed41 2582
3ee64f39 2583 memset(&udp_conf, 0, sizeof(udp_conf));
e4c7ed41 2584
3ee64f39
TH		 2585 if (ipv6) {
2586 udp_conf.family = AF_INET6;
3ee64f39 2587 udp_conf.use_udp6_rx_checksums =
3dc2b6a8 2588 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
a43a9ef6 2589 udp_conf.ipv6_v6only = 1;
3ee64f39
TH		 2590 } else {
2591 udp_conf.family = AF_INET;
e4c7ed41 2592 }
e4c7ed41 2593
3ee64f39 2594 udp_conf.local_udp_port = port;
553675fb 2595
3ee64f39
TH		 2596 /* Open UDP socket */
2597 err = udp_sock_create(net, &udp_conf, &sock);
2598 if (err < 0)
2599 return ERR_PTR(err);
e4c7ed41 2600
39deb2c7 2601 return sock;
e4c7ed41
CW		 2602}
2603
2604/* Create new listen socket if needed */
b1be00a6
JB		 2605static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
2606 __be16 port, u32 flags)
e4c7ed41
CW		 2607{
2608 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2609 struct vxlan_sock *vs;
2610 struct socket *sock;
e4c7ed41 2611 unsigned int h;
acbf74a7 2612 struct udp_tunnel_sock_cfg tunnel_cfg;
e4c7ed41 2613
dc01e7d3 2614 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
e4c7ed41
CW		 2615 if (!vs)
2616 return ERR_PTR(-ENOMEM);
2617
2618 for (h = 0; h < VNI_HASH_SIZE; ++h)
2619 INIT_HLIST_HEAD(&vs->vni_list[h]);
2620
2621 INIT_WORK(&vs->del_work, vxlan_del_work);
2622
3ee64f39 2623 sock = vxlan_create_sock(net, ipv6, port, flags);
39deb2c7 2624 if (IS_ERR(sock)) {
56ef9c90
MRL		 2625 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port),
2626 PTR_ERR(sock));
553675fb 2627 kfree(vs);
e50fddc8 2628 return ERR_CAST(sock);
553675fb 2629 }
e4c7ed41
CW		 2630
2631 vs->sock = sock;
9c2e24e1 2632 atomic_set(&vs->refcnt, 1);
af33c1ad 2633 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
553675fb 2634
dc01e7d3
OG		 2635 /* Initialize the vxlan udp offloads structure */
2636 vs->udp_offloads.port = port;
2637 vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive;
2638 vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete;
2639
9c2e24e1
PS		 2640 spin_lock(&vn->sock_lock);
2641 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
dc01e7d3 2642 vxlan_notify_add_rx_port(vs);
9c2e24e1 2643 spin_unlock(&vn->sock_lock);
553675fb 2644
2645 /* Mark socket as an encapsulation socket. */
acbf74a7
AZ		 2646 tunnel_cfg.sk_user_data = vs;
2647 tunnel_cfg.encap_type = 1;
f2d1968e 2648 tunnel_cfg.encap_rcv = vxlan_rcv;
acbf74a7
AZ		 2649 tunnel_cfg.encap_destroy = NULL;
2650
2651 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
e4c7ed41 2652
9c2e24e1
PS		 2653 return vs;
2654}
2655
b1be00a6 2656static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6)
9c2e24e1 2657{
205f356d
JB		 2658 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2659 struct vxlan_sock *vs = NULL;
9c2e24e1 2660
205f356d 2661 if (!vxlan->cfg.no_share) {
56ef9c90 2662 spin_lock(&vn->sock_lock);
205f356d
JB		 2663 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
2664 vxlan->cfg.dst_port, vxlan->flags);
2665 if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) {
56ef9c90 2666 spin_unlock(&vn->sock_lock);
205f356d 2667 return -EBUSY;
56ef9c90
MRL		 2668 }
2669 spin_unlock(&vn->sock_lock);
2670 }
205f356d 2671 if (!vs)
b1be00a6
JB		 2672 vs = vxlan_socket_create(vxlan->net, ipv6,
2673 vxlan->cfg.dst_port, vxlan->flags);
205f356d
JB		 2674 if (IS_ERR(vs))
2675 return PTR_ERR(vs);
b1be00a6
JB		 2676#if IS_ENABLED(CONFIG_IPV6)
2677 if (ipv6)
2678 vxlan->vn6_sock = vs;
2679 else
2680#endif
2681 vxlan->vn4_sock = vs;
205f356d
JB		 2682 vxlan_vs_add_dev(vs, vxlan);
2683 return 0;
553675fb 2684}
2685
b1be00a6
JB		 2686static int vxlan_sock_add(struct vxlan_dev *vxlan)
2687{
2688 bool ipv6 = vxlan->flags & VXLAN_F_IPV6;
2689 bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA;
2690 int ret = 0;
2691
2692 vxlan->vn4_sock = NULL;
2693#if IS_ENABLED(CONFIG_IPV6)
2694 vxlan->vn6_sock = NULL;
2695 if (ipv6 || metadata)
2696 ret = __vxlan_sock_add(vxlan, true);
2697#endif
2698 if (!ret && (!ipv6 || metadata))
2699 ret = __vxlan_sock_add(vxlan, false);
2700 if (ret < 0)
2701 vxlan_sock_release(vxlan);
2702 return ret;
2703}
2704
0dfbdf41
TG		 2705static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
2706 struct vxlan_config *conf)
d342894c 2707{
33564bbb 2708 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
07b9b37c 2709 struct vxlan_dev *vxlan = netdev_priv(dev), *tmp;
c7995c43 2710 struct vxlan_rdst *dst = &vxlan->default_dst;
b1be00a6 2711 unsigned short needed_headroom = ETH_HLEN;
d342894c 2712 int err;
e4c7ed41 2713 bool use_ipv6 = false;
0dfbdf41 2714 __be16 default_port = vxlan->cfg.dst_port;
7e059158 2715 struct net_device *lowerdev = NULL;
d342894c 2716
33564bbb 2717 vxlan->net = src_net;
f01ec1c0 2718
0dfbdf41 2719 dst->remote_vni = conf->vni;
d342894c 2720
0dfbdf41 2721 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
d342894c 2722
0dfbdf41
TG		 2723 /* Unless IPv6 is explicitly requested, assume IPv4 */
2724 if (!dst->remote_ip.sa.sa_family)
2725 dst->remote_ip.sa.sa_family = AF_INET;
e4c7ed41 2726
0dfbdf41 2727 if (dst->remote_ip.sa.sa_family == AF_INET6 ||
057ba29b
JB		 2728 vxlan->cfg.saddr.sa.sa_family == AF_INET6) {
2729 if (!IS_ENABLED(CONFIG_IPV6))
2730 return -EPFNOSUPPORT;
e4c7ed41 2731 use_ipv6 = true;
b1be00a6 2732 vxlan->flags |= VXLAN_F_IPV6;
057ba29b 2733 }
d342894c 2734
0dfbdf41 2735 if (conf->remote_ifindex) {
7e059158 2736 lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex);
0dfbdf41 2737 dst->remote_ifindex = conf->remote_ifindex;
34e02aa1 2738
2739 if (!lowerdev) {
c7995c43 2740 pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
34e02aa1 2741 return -ENODEV;
2742 }
d342894c 2743
e4c7ed41
CW		 2744#if IS_ENABLED(CONFIG_IPV6)
2745 if (use_ipv6) {
2746 struct inet6_dev *idev = __in6_dev_get(lowerdev);
2747 if (idev && idev->cnf.disable_ipv6) {
2748 pr_info("IPv6 is disabled via sysctl\n");
2749 return -EPERM;
2750 }
e4c7ed41
CW		 2751 }
2752#endif
2753
0dfbdf41 2754 if (!conf->mtu)
e4c7ed41 2755 dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
1ba56fb4 2756
b1be00a6 2757 needed_headroom = lowerdev->hard_header_len;
9dc2ad10 2758 }
d342894c 2759
7e059158
DW		 2760 if (conf->mtu) {
2761 err = __vxlan_change_mtu(dev, lowerdev, dst, conf->mtu, false);
2762 if (err)
2763 return err;
2764 }
2765
b1be00a6
JB		 2766 if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
2767 needed_headroom += VXLAN6_HEADROOM;
2768 else
2769 needed_headroom += VXLAN_HEADROOM;
2770 dev->needed_headroom = needed_headroom;
2771
0dfbdf41
TG		 2772 memcpy(&vxlan->cfg, conf, sizeof(*conf));
2773 if (!vxlan->cfg.dst_port)
2774 vxlan->cfg.dst_port = default_port;
2775 vxlan->flags |= conf->flags;
2776
2777 if (!vxlan->cfg.age_interval)
2778 vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
2779
07b9b37c
ND		 2780 list_for_each_entry(tmp, &vn->vxlan_list, next) {
2781 if (tmp->cfg.vni == conf->vni &&
2782 (tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 ||
2783 tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 &&
2784 tmp->cfg.dst_port == vxlan->cfg.dst_port &&
2785 (tmp->flags & VXLAN_F_RCV_FLAGS) ==
2786 (vxlan->flags & VXLAN_F_RCV_FLAGS))
0dfbdf41 2787 return -EEXIST;
07b9b37c 2788 }
0dfbdf41
TG		 2789
2790 dev->ethtool_ops = &vxlan_ethtool_ops;
2791
2792 /* create an fdb entry for a valid default destination */
2793 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
2794 err = vxlan_fdb_create(vxlan, all_zeros_mac,
2795 &vxlan->default_dst.remote_ip,
2796 NUD_REACHABLE|NUD_PERMANENT,
2797 NLM_F_EXCL|NLM_F_CREATE,
2798 vxlan->cfg.dst_port,
2799 vxlan->default_dst.remote_vni,
2800 vxlan->default_dst.remote_ifindex,
2801 NTF_SELF);
2802 if (err)
2803 return err;
2804 }
2805
2806 err = register_netdevice(dev);
2807 if (err) {
2808 vxlan_fdb_delete_default(vxlan);
2809 return err;
2810 }
2811
2812 list_add(&vxlan->next, &vn->vxlan_list);
2813
2814 return 0;
2815}
2816
2817struct net_device *vxlan_dev_create(struct net *net, const char *name,
2818 u8 name_assign_type, struct vxlan_config *conf)
2819{
2820 struct nlattr *tb[IFLA_MAX+1];
2821 struct net_device *dev;
2822 int err;
2823
2824 memset(&tb, 0, sizeof(tb));
2825
2826 dev = rtnl_create_link(net, name, name_assign_type,
2827 &vxlan_link_ops, tb);
2828 if (IS_ERR(dev))
2829 return dev;
2830
2831 err = vxlan_dev_configure(net, dev, conf);
2832 if (err < 0) {
2833 free_netdev(dev);
2834 return ERR_PTR(err);
2835 }
2836
2837 return dev;
2838}
2839EXPORT_SYMBOL_GPL(vxlan_dev_create);
2840
2841static int vxlan_newlink(struct net *src_net, struct net_device *dev,
2842 struct nlattr *tb[], struct nlattr *data[])
2843{
2844 struct vxlan_config conf;
2845 int err;
2846
0dfbdf41 2847 memset(&conf, 0, sizeof(conf));
e277de5f
JG		 2848
2849 if (data[IFLA_VXLAN_ID])
54bfd872 2850 conf.vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
0dfbdf41
TG		 2851
2852 if (data[IFLA_VXLAN_GROUP]) {
2853 conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
2854 } else if (data[IFLA_VXLAN_GROUP6]) {
2855 if (!IS_ENABLED(CONFIG_IPV6))
2856 return -EPFNOSUPPORT;
2857
2858 conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
2859 conf.remote_ip.sa.sa_family = AF_INET6;
2860 }
2861
2862 if (data[IFLA_VXLAN_LOCAL]) {
2863 conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
2864 conf.saddr.sa.sa_family = AF_INET;
2865 } else if (data[IFLA_VXLAN_LOCAL6]) {
2866 if (!IS_ENABLED(CONFIG_IPV6))
2867 return -EPFNOSUPPORT;
2868
2869 /* TODO: respect scope id */
2870 conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
2871 conf.saddr.sa.sa_family = AF_INET6;
2872 }
2873
2874 if (data[IFLA_VXLAN_LINK])
2875 conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
2876
d342894c 2877 if (data[IFLA_VXLAN_TOS])
0dfbdf41 2878 conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
d342894c 2879
afb97186 2880 if (data[IFLA_VXLAN_TTL])
0dfbdf41 2881 conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
afb97186 2882
d342894c 2883 if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
0dfbdf41 2884 conf.flags |= VXLAN_F_LEARN;
d342894c 2885
2886 if (data[IFLA_VXLAN_AGEING])
0dfbdf41 2887 conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
d342894c 2888
e4f67add 2889 if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
0dfbdf41 2890 conf.flags |= VXLAN_F_PROXY;
e4f67add
DS		 2891
2892 if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
0dfbdf41 2893 conf.flags |= VXLAN_F_RSC;
e4f67add
DS		 2894
2895 if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
0dfbdf41 2896 conf.flags |= VXLAN_F_L2MISS;
e4f67add
DS		 2897
2898 if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
0dfbdf41 2899 conf.flags |= VXLAN_F_L3MISS;
e4f67add 2900
d342894c 2901 if (data[IFLA_VXLAN_LIMIT])
0dfbdf41 2902 conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
d342894c 2903
f8a9b1bc
AS		 2904 if (data[IFLA_VXLAN_COLLECT_METADATA] &&
2905 nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
2906 conf.flags |= VXLAN_F_COLLECT_METADATA;
2907
05f47d69 2908 if (data[IFLA_VXLAN_PORT_RANGE]) {
2909 const struct ifla_vxlan_port_range *p
2910 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
0dfbdf41
TG		 2911 conf.port_min = ntohs(p->low);
2912 conf.port_max = ntohs(p->high);
05f47d69 2913 }
2914
823aa873 2915 if (data[IFLA_VXLAN_PORT])
0dfbdf41 2916 conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
823aa873 2917
6ceb31ca
AD		 2918 if (data[IFLA_VXLAN_UDP_CSUM] &&
2919 !nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
2920 conf.flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
359a0ea9
TH		 2921
2922 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
2923 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
0dfbdf41 2924 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
359a0ea9
TH		 2925
2926 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
2927 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
0dfbdf41 2928 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
359a0ea9 2929
dfd8645e
TH		 2930 if (data[IFLA_VXLAN_REMCSUM_TX] &&
2931 nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
0dfbdf41 2932 conf.flags |= VXLAN_F_REMCSUM_TX;
dfd8645e
TH		 2933
2934 if (data[IFLA_VXLAN_REMCSUM_RX] &&
2935 nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
0dfbdf41 2936 conf.flags |= VXLAN_F_REMCSUM_RX;
dfd8645e 2937
3511494c 2938 if (data[IFLA_VXLAN_GBP])
0dfbdf41 2939 conf.flags |= VXLAN_F_GBP;
3511494c 2940
0ace2ca8 2941 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
0dfbdf41 2942 conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
0ace2ca8 2943
0dfbdf41
TG		 2944 err = vxlan_dev_configure(src_net, dev, &conf);
2945 switch (err) {
2946 case -ENODEV:
2947 pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
2948 break;
1b13c97f 2949
0dfbdf41
TG		 2950 case -EPERM:
2951 pr_info("IPv6 is disabled via sysctl\n");
2952 break;
d342894c 2953
0dfbdf41 2954 case -EEXIST:
54bfd872 2955 pr_info("duplicate VNI %u\n", be32_to_cpu(conf.vni));
0dfbdf41 2956 break;
afbd8bae
MR		 2957 }
2958
0dfbdf41 2959 return err;
d342894c 2960}
2961
2962static void vxlan_dellink(struct net_device *dev, struct list_head *head)
2963{
2964 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2965 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
d342894c 2966
fe5c3561 2967 spin_lock(&vn->sock_lock);
9c2e24e1
PS		 2968 if (!hlist_unhashed(&vxlan->hlist))
2969 hlist_del_rcu(&vxlan->hlist);
fe5c3561 2970 spin_unlock(&vn->sock_lock);
2971
58ce31cc 2972 gro_cells_destroy(&vxlan->gro_cells);
553675fb 2973 list_del(&vxlan->next);
d342894c 2974 unregister_netdevice_queue(dev, head);
2975}
2976
2977static size_t vxlan_get_size(const struct net_device *dev)
2978{
2979
2980 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
e4c7ed41 2981 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
d342894c 2982 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
e4c7ed41 2983 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
d342894c 2984 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
2985 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
2986 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
e4f67add
DS		 2987 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
2988 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
2989 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
2990 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
da8b43c0 2991 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
d342894c 2992 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
2993 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
05f47d69 2994 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
359a0ea9
TH		 2995 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
2996 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
2997 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
2998 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
dfd8645e
TH		 2999 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
3000 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
d342894c 3001 0;
3002}
3003
3004static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
3005{
3006 const struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 3007 const struct vxlan_rdst *dst = &vxlan->default_dst;
05f47d69 3008 struct ifla_vxlan_port_range ports = {
0dfbdf41
TG		 3009 .low = htons(vxlan->cfg.port_min),
3010 .high = htons(vxlan->cfg.port_max),
05f47d69 3011 };
d342894c 3012
54bfd872 3013 if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni)))
d342894c 3014 goto nla_put_failure;
3015
e4c7ed41
CW		 3016 if (!vxlan_addr_any(&dst->remote_ip)) {
3017 if (dst->remote_ip.sa.sa_family == AF_INET) {
930345ea
JB		 3018 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
3019 dst->remote_ip.sin.sin_addr.s_addr))
e4c7ed41
CW		 3020 goto nla_put_failure;
3021#if IS_ENABLED(CONFIG_IPV6)
3022 } else {
930345ea
JB		 3023 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
3024 &dst->remote_ip.sin6.sin6_addr))
e4c7ed41
CW		 3025 goto nla_put_failure;
3026#endif
3027 }
3028 }
d342894c 3029
c7995c43 3030 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
d342894c 3031 goto nla_put_failure;
3032
0dfbdf41
TG		 3033 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
3034 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
930345ea 3035 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
0dfbdf41 3036 vxlan->cfg.saddr.sin.sin_addr.s_addr))
e4c7ed41
CW		 3037 goto nla_put_failure;
3038#if IS_ENABLED(CONFIG_IPV6)
3039 } else {
930345ea 3040 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
0dfbdf41 3041 &vxlan->cfg.saddr.sin6.sin6_addr))
e4c7ed41
CW		 3042 goto nla_put_failure;
3043#endif
3044 }
3045 }
d342894c 3046
0dfbdf41
TG		 3047 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
3048 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
e4f67add
DS		 3049 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
3050 !!(vxlan->flags & VXLAN_F_LEARN)) ||
3051 nla_put_u8(skb, IFLA_VXLAN_PROXY,
3052 !!(vxlan->flags & VXLAN_F_PROXY)) ||
3053 nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) ||
3054 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
3055 !!(vxlan->flags & VXLAN_F_L2MISS)) ||
3056 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
3057 !!(vxlan->flags & VXLAN_F_L3MISS)) ||
da8b43c0
AS		 3058 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
3059 !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) ||
0dfbdf41
TG		 3060 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
3061 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
3062 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
359a0ea9 3063 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
6ceb31ca 3064 !(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM_TX)) ||
359a0ea9
TH		 3065 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
3066 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
3067 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
dfd8645e
TH		 3068 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
3069 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
3070 !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) ||
3071 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
3072 !!(vxlan->flags & VXLAN_F_REMCSUM_RX)))
d342894c 3073 goto nla_put_failure;
3074
05f47d69 3075 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
3076 goto nla_put_failure;
3077
3511494c
TG		 3078 if (vxlan->flags & VXLAN_F_GBP &&
3079 nla_put_flag(skb, IFLA_VXLAN_GBP))
3080 goto nla_put_failure;
3081
0ace2ca8
TH		 3082 if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL &&
3083 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3084 goto nla_put_failure;
3085
d342894c 3086 return 0;
3087
3088nla_put_failure:
3089 return -EMSGSIZE;
3090}
3091
1728d4fa
ND		 3092static struct net *vxlan_get_link_net(const struct net_device *dev)
3093{
3094 struct vxlan_dev *vxlan = netdev_priv(dev);
3095
3096 return vxlan->net;
3097}
3098
d342894c 3099static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3100 .kind = "vxlan",
3101 .maxtype = IFLA_VXLAN_MAX,
3102 .policy = vxlan_policy,
3103 .priv_size = sizeof(struct vxlan_dev),
3104 .setup = vxlan_setup,
3105 .validate = vxlan_validate,
3106 .newlink = vxlan_newlink,
3107 .dellink = vxlan_dellink,
3108 .get_size = vxlan_get_size,
3109 .fill_info = vxlan_fill_info,
1728d4fa 3110 .get_link_net = vxlan_get_link_net,
d342894c 3111};
3112
acaf4e70
DB		 3113static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3114 struct net_device *dev)
3115{
3116 struct vxlan_dev *vxlan, *next;
3117 LIST_HEAD(list_kill);
3118
3119 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3120 struct vxlan_rdst *dst = &vxlan->default_dst;
3121
3122 /* In case we created vxlan device with carrier
3123 * and we loose the carrier due to module unload
3124 * we also need to remove vxlan device. In other
3125 * cases, it's not necessary and remote_ifindex
3126 * is 0 here, so no matches.
3127 */
3128 if (dst->remote_ifindex == dev->ifindex)
3129 vxlan_dellink(vxlan->dev, &list_kill);
3130 }
3131
3132 unregister_netdevice_many(&list_kill);
3133}
3134
3135static int vxlan_lowerdev_event(struct notifier_block *unused,
3136 unsigned long event, void *ptr)
3137{
3138 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
783c1463 3139 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
acaf4e70 3140
783c1463 3141 if (event == NETDEV_UNREGISTER)
acaf4e70
DB		 3142 vxlan_handle_lowerdev_unregister(vn, dev);
3143
3144 return NOTIFY_DONE;
3145}
3146
3147static struct notifier_block vxlan_notifier_block __read_mostly = {
3148 .notifier_call = vxlan_lowerdev_event,
3149};
3150
d342894c 3151static __net_init int vxlan_init_net(struct net *net)
3152{
3153 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
31fec5aa 3154 unsigned int h;
d342894c 3155
553675fb 3156 INIT_LIST_HEAD(&vn->vxlan_list);
1c51a915 3157 spin_lock_init(&vn->sock_lock);
d342894c 3158
553675fb 3159 for (h = 0; h < PORT_HASH_SIZE; ++h)
3160 INIT_HLIST_HEAD(&vn->sock_list[h]);
d342894c 3161
3162 return 0;
3163}
3164
f01ec1c0
ND		 3165static void __net_exit vxlan_exit_net(struct net *net)
3166{
3167 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3168 struct vxlan_dev *vxlan, *next;
3169 struct net_device *dev, *aux;
3170 LIST_HEAD(list);
3171
3172 rtnl_lock();
3173 for_each_netdev_safe(net, dev, aux)
3174 if (dev->rtnl_link_ops == &vxlan_link_ops)
3175 unregister_netdevice_queue(dev, &list);
3176
3177 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3178 /* If vxlan->dev is in the same netns, it has already been added
3179 * to the list by the previous loop.
3180 */
58ce31cc
TH		 3181 if (!net_eq(dev_net(vxlan->dev), net)) {
3182 gro_cells_destroy(&vxlan->gro_cells);
13c3ed6a 3183 unregister_netdevice_queue(vxlan->dev, &list);
58ce31cc 3184 }
f01ec1c0
ND		 3185 }
3186
3187 unregister_netdevice_many(&list);
3188 rtnl_unlock();
3189}
3190
d342894c 3191static struct pernet_operations vxlan_net_ops = {
3192 .init = vxlan_init_net,
f01ec1c0 3193 .exit = vxlan_exit_net,
d342894c 3194 .id = &vxlan_net_id,
3195 .size = sizeof(struct vxlan_net),
3196};
3197
3198static int __init vxlan_init_module(void)
3199{
3200 int rc;
3201
758c57d1
SH		 3202 vxlan_wq = alloc_workqueue("vxlan", 0, 0);
3203 if (!vxlan_wq)
3204 return -ENOMEM;
3205
d342894c 3206 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3207
783c1463 3208 rc = register_pernet_subsys(&vxlan_net_ops);
d342894c 3209 if (rc)
3210 goto out1;
3211
acaf4e70 3212 rc = register_netdevice_notifier(&vxlan_notifier_block);
d342894c 3213 if (rc)
3214 goto out2;
3215
acaf4e70
DB		 3216 rc = rtnl_link_register(&vxlan_link_ops);
3217 if (rc)
3218 goto out3;
d342894c 3219
acaf4e70
DB		 3220 return 0;
3221out3:
3222 unregister_netdevice_notifier(&vxlan_notifier_block);
d342894c 3223out2:
783c1463 3224 unregister_pernet_subsys(&vxlan_net_ops);
d342894c 3225out1:
758c57d1 3226 destroy_workqueue(vxlan_wq);
d342894c 3227 return rc;
3228}
7332a13b 3229late_initcall(vxlan_init_module);
d342894c 3230
3231static void __exit vxlan_cleanup_module(void)
3232{
b7153984 3233 rtnl_link_unregister(&vxlan_link_ops);
acaf4e70 3234 unregister_netdevice_notifier(&vxlan_notifier_block);
758c57d1 3235 destroy_workqueue(vxlan_wq);
783c1463
DB		 3236 unregister_pernet_subsys(&vxlan_net_ops);
3237 /* rcu_barrier() is called by netns */
d342894c 3238}
3239module_exit(vxlan_cleanup_module);
3240
3241MODULE_LICENSE("GPL");
3242MODULE_VERSION(VXLAN_VERSION);
3b8df3c6 3243MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
ead5139a 3244MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
d342894c 3245MODULE_ALIAS_RTNL_LINK("vxlan");
Linux kernel - Deliverables
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