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vxlan: consolidate csum flag handling
[mirror_ubuntu-artful-kernel.git] / drivers / net / vxlan.c
CommitLineData
d342894c 1/*
eb5ce439 2 * VXLAN: Virtual eXtensible Local Area Network
d342894c 3 *
3b8df3c6 4 * Copyright (c) 2012-2013 Vyatta Inc.
d342894c 5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
d342894c 9 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <linux/kernel.h>
14#include <linux/types.h>
15#include <linux/module.h>
16#include <linux/errno.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/rculist.h>
20#include <linux/netdevice.h>
21#include <linux/in.h>
22#include <linux/ip.h>
23#include <linux/udp.h>
24#include <linux/igmp.h>
25#include <linux/etherdevice.h>
26#include <linux/if_ether.h>
1eaa8178 27#include <linux/if_vlan.h>
d342894c 28#include <linux/hash.h>
1b13c97f 29#include <linux/ethtool.h>
e4f67add
DS		 30#include <net/arp.h>
31#include <net/ndisc.h>
d342894c 32#include <net/ip.h>
c5441932 33#include <net/ip_tunnels.h>
d342894c 34#include <net/icmp.h>
35#include <net/udp.h>
3ee64f39 36#include <net/udp_tunnel.h>
d342894c 37#include <net/rtnetlink.h>
38#include <net/route.h>
39#include <net/dsfield.h>
40#include <net/inet_ecn.h>
41#include <net/net_namespace.h>
42#include <net/netns/generic.h>
012a5729 43#include <net/vxlan.h>
dc01e7d3 44#include <net/protocol.h>
acbf74a7 45#include <net/udp_tunnel.h>
e4c7ed41
CW		 46#if IS_ENABLED(CONFIG_IPV6)
47#include <net/ipv6.h>
48#include <net/addrconf.h>
49#include <net/ip6_tunnel.h>
660d98ca 50#include <net/ip6_checksum.h>
e4c7ed41 51#endif
ee122c79 52#include <net/dst_metadata.h>
d342894c 53
54#define VXLAN_VERSION "0.1"
55
553675fb 56#define PORT_HASH_BITS 8
57#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
d342894c 58#define FDB_AGE_DEFAULT 300 /* 5 min */
59#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
60
23c578bf 61/* UDP port for VXLAN traffic.
62 * The IANA assigned port is 4789, but the Linux default is 8472
234f5b73 63 * for compatibility with early adopters.
23c578bf 64 */
9daaa397
SH		 65static unsigned short vxlan_port __read_mostly = 8472;
66module_param_named(udp_port, vxlan_port, ushort, 0444);
d342894c 67MODULE_PARM_DESC(udp_port, "Destination UDP port");
68
69static bool log_ecn_error = true;
70module_param(log_ecn_error, bool, 0644);
71MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
72
60d9d4c6 73static int vxlan_net_id;
0dfbdf41 74static struct rtnl_link_ops vxlan_link_ops;
553675fb 75
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 */
200static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id)
201{
202 return &vs->vni_list[hash_32(id, VNI_HASH_BITS)];
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
5cfccc5a 245static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id)
d342894c 246{
247 struct vxlan_dev *vxlan;
d342894c 248
553675fb 249 hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) {
c7995c43 250 if (vxlan->default_dst.remote_vni == id)
d342894c 251 return vxlan;
252 }
253
254 return NULL;
255}
256
5cfccc5a 257/* Look up VNI in a per net namespace table */
19ca9fc1 258static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id,
ac5132d1
TG		 259 sa_family_t family, __be16 port,
260 u32 flags)
5cfccc5a
PS		 261{
262 struct vxlan_sock *vs;
263
ac5132d1 264 vs = vxlan_find_sock(net, family, port, flags);
5cfccc5a
PS		 265 if (!vs)
266 return NULL;
267
268 return vxlan_vs_find_vni(vs, id);
269}
270
d342894c 271/* Fill in neighbour message in skbuff. */
272static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
234f5b73
SH		 273 const struct vxlan_fdb *fdb,
274 u32 portid, u32 seq, int type, unsigned int flags,
275 const struct vxlan_rdst *rdst)
d342894c 276{
277 unsigned long now = jiffies;
278 struct nda_cacheinfo ci;
279 struct nlmsghdr *nlh;
280 struct ndmsg *ndm;
e4f67add 281 bool send_ip, send_eth;
d342894c 282
283 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
284 if (nlh == NULL)
285 return -EMSGSIZE;
286
287 ndm = nlmsg_data(nlh);
288 memset(ndm, 0, sizeof(*ndm));
e4f67add
DS		 289
290 send_eth = send_ip = true;
291
292 if (type == RTM_GETNEIGH) {
293 ndm->ndm_family = AF_INET;
e4c7ed41 294 send_ip = !vxlan_addr_any(&rdst->remote_ip);
e4f67add
DS		 295 send_eth = !is_zero_ether_addr(fdb->eth_addr);
296 } else
297 ndm->ndm_family = AF_BRIDGE;
d342894c 298 ndm->ndm_state = fdb->state;
299 ndm->ndm_ifindex = vxlan->dev->ifindex;
ae884082 300 ndm->ndm_flags = fdb->flags;
545469f7 301 ndm->ndm_type = RTN_UNICAST;
d342894c 302
193523bf 303 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
4967082b 304 nla_put_s32(skb, NDA_LINK_NETNSID,
7a0877d4 305 peernet2id_alloc(dev_net(vxlan->dev), vxlan->net)))
193523bf
ND		 306 goto nla_put_failure;
307
e4f67add 308 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
d342894c 309 goto nla_put_failure;
310
e4c7ed41 311 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
6681712d
DS		 312 goto nla_put_failure;
313
0dfbdf41 314 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
6681712d
DS		 315 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
316 goto nla_put_failure;
c7995c43 317 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
60d9d4c6 318 nla_put_u32(skb, NDA_VNI, rdst->remote_vni))
6681712d
DS		 319 goto nla_put_failure;
320 if (rdst->remote_ifindex &&
321 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
d342894c 322 goto nla_put_failure;
323
324 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
325 ci.ndm_confirmed = 0;
326 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
327 ci.ndm_refcnt = 0;
328
329 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
330 goto nla_put_failure;
331
053c095a
JB		 332 nlmsg_end(skb, nlh);
333 return 0;
d342894c 334
335nla_put_failure:
336 nlmsg_cancel(skb, nlh);
337 return -EMSGSIZE;
338}
339
340static inline size_t vxlan_nlmsg_size(void)
341{
342 return NLMSG_ALIGN(sizeof(struct ndmsg))
343 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
e4c7ed41 344 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
73cf3317 345 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
6681712d
DS		 346 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
347 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
4967082b 348 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
d342894c 349 + nla_total_size(sizeof(struct nda_cacheinfo));
350}
351
9e4b93f9
ND		 352static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
353 struct vxlan_rdst *rd, int type)
d342894c 354{
355 struct net *net = dev_net(vxlan->dev);
356 struct sk_buff *skb;
357 int err = -ENOBUFS;
358
359 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
360 if (skb == NULL)
361 goto errout;
362
9e4b93f9 363 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
d342894c 364 if (err < 0) {
365 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
366 WARN_ON(err == -EMSGSIZE);
367 kfree_skb(skb);
368 goto errout;
369 }
370
371 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
372 return;
373errout:
374 if (err < 0)
375 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
376}
377
e4c7ed41 378static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
e4f67add
DS		 379{
380 struct vxlan_dev *vxlan = netdev_priv(dev);
bb3fd687
SH		 381 struct vxlan_fdb f = {
382 .state = NUD_STALE,
383 };
384 struct vxlan_rdst remote = {
e4c7ed41 385 .remote_ip = *ipa, /* goes to NDA_DST */
bb3fd687
SH		 386 .remote_vni = VXLAN_N_VID,
387 };
3e61aa8f 388
9e4b93f9 389 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 390}
391
392static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
393{
bb3fd687
SH		 394 struct vxlan_fdb f = {
395 .state = NUD_STALE,
396 };
9e4b93f9 397 struct vxlan_rdst remote = { };
e4f67add 398
e4f67add
DS		 399 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
400
9e4b93f9 401 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 402}
403
d342894c 404/* Hash Ethernet address */
405static u32 eth_hash(const unsigned char *addr)
406{
407 u64 value = get_unaligned((u64 *)addr);
408
409 /* only want 6 bytes */
410#ifdef __BIG_ENDIAN
d342894c 411 value >>= 16;
321fb991 412#else
413 value <<= 16;
d342894c 414#endif
415 return hash_64(value, FDB_HASH_BITS);
416}
417
418/* Hash chain to use given mac address */
419static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
420 const u8 *mac)
421{
422 return &vxlan->fdb_head[eth_hash(mac)];
423}
424
425/* Look up Ethernet address in forwarding table */
014be2c8 426static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
d342894c 427 const u8 *mac)
d342894c 428{
429 struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
430 struct vxlan_fdb *f;
d342894c 431
b67bfe0d 432 hlist_for_each_entry_rcu(f, head, hlist) {
7367d0b5 433 if (ether_addr_equal(mac, f->eth_addr))
d342894c 434 return f;
435 }
436
437 return NULL;
438}
439
014be2c8
SS		 440static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
441 const u8 *mac)
442{
443 struct vxlan_fdb *f;
444
445 f = __vxlan_find_mac(vxlan, mac);
446 if (f)
447 f->used = jiffies;
448
449 return f;
450}
451
a5e7c10a
MR		 452/* caller should hold vxlan->hash_lock */
453static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
e4c7ed41 454 union vxlan_addr *ip, __be16 port,
a5e7c10a 455 __u32 vni, __u32 ifindex)
6681712d 456{
3e61aa8f 457 struct vxlan_rdst *rd;
6681712d 458
3e61aa8f 459 list_for_each_entry(rd, &f->remotes, list) {
e4c7ed41 460 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
6681712d
DS		 461 rd->remote_port == port &&
462 rd->remote_vni == vni &&
463 rd->remote_ifindex == ifindex)
a5e7c10a 464 return rd;
6681712d 465 }
3e61aa8f 466
a5e7c10a
MR		 467 return NULL;
468}
469
906dc186
TR		 470/* Replace destination of unicast mac */
471static int vxlan_fdb_replace(struct vxlan_fdb *f,
e4c7ed41 472 union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex)
906dc186
TR		 473{
474 struct vxlan_rdst *rd;
475
476 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
477 if (rd)
478 return 0;
479
480 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
481 if (!rd)
482 return 0;
e4c7ed41 483 rd->remote_ip = *ip;
906dc186
TR		 484 rd->remote_port = port;
485 rd->remote_vni = vni;
486 rd->remote_ifindex = ifindex;
487 return 1;
488}
489
a5e7c10a
MR		 490/* Add/update destinations for multicast */
491static int vxlan_fdb_append(struct vxlan_fdb *f,
9e4b93f9
ND		 492 union vxlan_addr *ip, __be16 port, __u32 vni,
493 __u32 ifindex, struct vxlan_rdst **rdp)
a5e7c10a
MR		 494{
495 struct vxlan_rdst *rd;
496
497 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
498 if (rd)
499 return 0;
500
6681712d
DS		 501 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
502 if (rd == NULL)
503 return -ENOBUFS;
e4c7ed41 504 rd->remote_ip = *ip;
6681712d
DS		 505 rd->remote_port = port;
506 rd->remote_vni = vni;
507 rd->remote_ifindex = ifindex;
3e61aa8f
SH		 508
509 list_add_tail_rcu(&rd->list, &f->remotes);
510
9e4b93f9 511 *rdp = rd;
6681712d
DS		 512 return 1;
513}
514
dfd8645e
TH		 515static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
516 unsigned int off,
517 struct vxlanhdr *vh, size_t hdrlen,
0ace2ca8
TH		 518 u32 data, struct gro_remcsum *grc,
519 bool nopartial)
dfd8645e 520{
b7fe10e5 521 size_t start, offset;
dfd8645e
TH		 522
523 if (skb->remcsum_offload)
b7fe10e5 524 return vh;
dfd8645e
TH		 525
526 if (!NAPI_GRO_CB(skb)->csum_valid)
527 return NULL;
528
529 start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
530 offset = start + ((data & VXLAN_RCO_UDP) ?
531 offsetof(struct udphdr, check) :
532 offsetof(struct tcphdr, check));
533
b7fe10e5
TH		 534 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
535 start, offset, grc, nopartial);
dfd8645e
TH		 536
537 skb->remcsum_offload = 1;
538
539 return vh;
540}
541
a2b12f3c
TH		 542static struct sk_buff **vxlan_gro_receive(struct sk_buff **head,
543 struct sk_buff *skb,
544 struct udp_offload *uoff)
dc01e7d3
OG		 545{
546 struct sk_buff *p, **pp = NULL;
547 struct vxlanhdr *vh, *vh2;
9b174d88 548 unsigned int hlen, off_vx;
dc01e7d3 549 int flush = 1;
dfd8645e
TH		 550 struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock,
551 udp_offloads);
552 u32 flags;
26c4f7da
TH		 553 struct gro_remcsum grc;
554
555 skb_gro_remcsum_init(&grc);
dc01e7d3
OG		 556
557 off_vx = skb_gro_offset(skb);
558 hlen = off_vx + sizeof(*vh);
559 vh = skb_gro_header_fast(skb, off_vx);
560 if (skb_gro_header_hard(skb, hlen)) {
561 vh = skb_gro_header_slow(skb, hlen, off_vx);
562 if (unlikely(!vh))
563 goto out;
564 }
dc01e7d3 565
dfd8645e
TH		 566 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
567
568 flags = ntohl(vh->vx_flags);
569
570 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
571 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
0ace2ca8
TH		 572 ntohl(vh->vx_vni), &grc,
573 !!(vs->flags &
574 VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 575
576 if (!vh)
577 goto out;
578 }
579
b7fe10e5
TH		 580 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
581
dc01e7d3
OG		 582 flush = 0;
583
584 for (p = *head; p; p = p->next) {
585 if (!NAPI_GRO_CB(p)->same_flow)
586 continue;
587
588 vh2 = (struct vxlanhdr *)(p->data + off_vx);
3511494c
TG		 589 if (vh->vx_flags != vh2->vx_flags ||
590 vh->vx_vni != vh2->vx_vni) {
dc01e7d3
OG		 591 NAPI_GRO_CB(p)->same_flow = 0;
592 continue;
593 }
dc01e7d3
OG		 594 }
595
9b174d88 596 pp = eth_gro_receive(head, skb);
dc01e7d3 597
dc01e7d3 598out:
26c4f7da 599 skb_gro_remcsum_cleanup(skb, &grc);
dc01e7d3
OG		 600 NAPI_GRO_CB(skb)->flush |= flush;
601
602 return pp;
603}
604
a2b12f3c
TH		 605static int vxlan_gro_complete(struct sk_buff *skb, int nhoff,
606 struct udp_offload *uoff)
dc01e7d3 607{
cfdf1e1b
JG		 608 udp_tunnel_gro_complete(skb, nhoff);
609
9b174d88 610 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
dc01e7d3
OG		 611}
612
53cf5275 613/* Notify netdevs that UDP port started listening */
dc01e7d3 614static void vxlan_notify_add_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 615{
616 struct net_device *dev;
dc01e7d3 617 struct sock *sk = vs->sock->sk;
53cf5275 618 struct net *net = sock_net(sk);
705cc62f 619 sa_family_t sa_family = vxlan_get_sk_family(vs);
35e42379 620 __be16 port = inet_sk(sk)->inet_sport;
dc01e7d3
OG		 621 int err;
622
623 if (sa_family == AF_INET) {
787d7ac3 624 err = udp_add_offload(net, &vs->udp_offloads);
dc01e7d3
OG		 625 if (err)
626 pr_warn("vxlan: udp_add_offload failed with status %d\n", err);
627 }
53cf5275
JG		 628
629 rcu_read_lock();
630 for_each_netdev_rcu(net, dev) {
631 if (dev->netdev_ops->ndo_add_vxlan_port)
632 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
633 port);
634 }
635 rcu_read_unlock();
636}
637
638/* Notify netdevs that UDP port is no more listening */
dc01e7d3 639static void vxlan_notify_del_rx_port(struct vxlan_sock *vs)
53cf5275
JG		 640{
641 struct net_device *dev;
dc01e7d3 642 struct sock *sk = vs->sock->sk;
53cf5275 643 struct net *net = sock_net(sk);
705cc62f 644 sa_family_t sa_family = vxlan_get_sk_family(vs);
35e42379 645 __be16 port = inet_sk(sk)->inet_sport;
53cf5275
JG		 646
647 rcu_read_lock();
648 for_each_netdev_rcu(net, dev) {
649 if (dev->netdev_ops->ndo_del_vxlan_port)
650 dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family,
651 port);
652 }
653 rcu_read_unlock();
dc01e7d3
OG		 654
655 if (sa_family == AF_INET)
656 udp_del_offload(&vs->udp_offloads);
53cf5275
JG		 657}
658
d342894c 659/* Add new entry to forwarding table -- assumes lock held */
660static int vxlan_fdb_create(struct vxlan_dev *vxlan,
e4c7ed41 661 const u8 *mac, union vxlan_addr *ip,
6681712d 662 __u16 state, __u16 flags,
73cf3317 663 __be16 port, __u32 vni, __u32 ifindex,
ae884082 664 __u8 ndm_flags)
d342894c 665{
9e4b93f9 666 struct vxlan_rdst *rd = NULL;
d342894c 667 struct vxlan_fdb *f;
668 int notify = 0;
669
014be2c8 670 f = __vxlan_find_mac(vxlan, mac);
d342894c 671 if (f) {
672 if (flags & NLM_F_EXCL) {
673 netdev_dbg(vxlan->dev,
674 "lost race to create %pM\n", mac);
675 return -EEXIST;
676 }
677 if (f->state != state) {
678 f->state = state;
679 f->updated = jiffies;
680 notify = 1;
681 }
ae884082
DS		 682 if (f->flags != ndm_flags) {
683 f->flags = ndm_flags;
684 f->updated = jiffies;
685 notify = 1;
686 }
906dc186
TR		 687 if ((flags & NLM_F_REPLACE)) {
688 /* Only change unicasts */
689 if (!(is_multicast_ether_addr(f->eth_addr) ||
690 is_zero_ether_addr(f->eth_addr))) {
60840429 691 notify |= vxlan_fdb_replace(f, ip, port, vni,
906dc186 692 ifindex);
906dc186
TR		 693 } else
694 return -EOPNOTSUPP;
695 }
6681712d 696 if ((flags & NLM_F_APPEND) &&
58e4c767
MR		 697 (is_multicast_ether_addr(f->eth_addr) ||
698 is_zero_ether_addr(f->eth_addr))) {
9e4b93f9
ND		 699 int rc = vxlan_fdb_append(f, ip, port, vni, ifindex,
700 &rd);
6681712d
DS		 701
702 if (rc < 0)
703 return rc;
704 notify |= rc;
705 }
d342894c 706 } else {
707 if (!(flags & NLM_F_CREATE))
708 return -ENOENT;
709
0dfbdf41
TG		 710 if (vxlan->cfg.addrmax &&
711 vxlan->addrcnt >= vxlan->cfg.addrmax)
d342894c 712 return -ENOSPC;
713
906dc186
TR		 714 /* Disallow replace to add a multicast entry */
715 if ((flags & NLM_F_REPLACE) &&
716 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
717 return -EOPNOTSUPP;
718
e4c7ed41 719 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
d342894c 720 f = kmalloc(sizeof(*f), GFP_ATOMIC);
721 if (!f)
722 return -ENOMEM;
723
724 notify = 1;
d342894c 725 f->state = state;
ae884082 726 f->flags = ndm_flags;
d342894c 727 f->updated = f->used = jiffies;
3e61aa8f 728 INIT_LIST_HEAD(&f->remotes);
d342894c 729 memcpy(f->eth_addr, mac, ETH_ALEN);
730
9e4b93f9 731 vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
3e61aa8f 732
d342894c 733 ++vxlan->addrcnt;
734 hlist_add_head_rcu(&f->hlist,
735 vxlan_fdb_head(vxlan, mac));
736 }
737
9e4b93f9
ND		 738 if (notify) {
739 if (rd == NULL)
740 rd = first_remote_rtnl(f);
741 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
742 }
d342894c 743
744 return 0;
745}
746
6706c82e 747static void vxlan_fdb_free(struct rcu_head *head)
6681712d
DS		 748{
749 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
3e61aa8f 750 struct vxlan_rdst *rd, *nd;
6681712d 751
3e61aa8f 752 list_for_each_entry_safe(rd, nd, &f->remotes, list)
6681712d 753 kfree(rd);
6681712d
DS		 754 kfree(f);
755}
756
d342894c 757static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
758{
759 netdev_dbg(vxlan->dev,
760 "delete %pM\n", f->eth_addr);
761
762 --vxlan->addrcnt;
9e4b93f9 763 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
d342894c 764
765 hlist_del_rcu(&f->hlist);
6681712d 766 call_rcu(&f->rcu, vxlan_fdb_free);
d342894c 767}
768
f0b074be 769static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
e4c7ed41 770 union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex)
d342894c 771{
6681712d 772 struct net *net = dev_net(vxlan->dev);
e4c7ed41 773 int err;
d342894c 774
f0b074be 775 if (tb[NDA_DST]) {
e4c7ed41
CW		 776 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
777 if (err)
778 return err;
f0b074be 779 } else {
e4c7ed41
CW		 780 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
781 if (remote->sa.sa_family == AF_INET) {
782 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
783 ip->sa.sa_family = AF_INET;
784#if IS_ENABLED(CONFIG_IPV6)
785 } else {
786 ip->sin6.sin6_addr = in6addr_any;
787 ip->sa.sa_family = AF_INET6;
788#endif
789 }
f0b074be 790 }
d342894c 791
6681712d 792 if (tb[NDA_PORT]) {
73cf3317 793 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
6681712d 794 return -EINVAL;
f0b074be
MR		 795 *port = nla_get_be16(tb[NDA_PORT]);
796 } else {
0dfbdf41 797 *port = vxlan->cfg.dst_port;
f0b074be 798 }
6681712d
DS		 799
800 if (tb[NDA_VNI]) {
801 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
802 return -EINVAL;
f0b074be
MR		 803 *vni = nla_get_u32(tb[NDA_VNI]);
804 } else {
805 *vni = vxlan->default_dst.remote_vni;
806 }
6681712d
DS		 807
808 if (tb[NDA_IFINDEX]) {
5abb0029 809 struct net_device *tdev;
6681712d
DS		 810
811 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
812 return -EINVAL;
f0b074be 813 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
73763949 814 tdev = __dev_get_by_index(net, *ifindex);
5abb0029 815 if (!tdev)
6681712d 816 return -EADDRNOTAVAIL;
f0b074be
MR		 817 } else {
818 *ifindex = 0;
819 }
820
821 return 0;
822}
823
824/* Add static entry (via netlink) */
825static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
826 struct net_device *dev,
f6f6424b 827 const unsigned char *addr, u16 vid, u16 flags)
f0b074be
MR		 828{
829 struct vxlan_dev *vxlan = netdev_priv(dev);
830 /* struct net *net = dev_net(vxlan->dev); */
e4c7ed41 831 union vxlan_addr ip;
f0b074be
MR		 832 __be16 port;
833 u32 vni, ifindex;
834 int err;
835
836 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
837 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
838 ndm->ndm_state);
839 return -EINVAL;
840 }
841
842 if (tb[NDA_DST] == NULL)
843 return -EINVAL;
844
845 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
846 if (err)
847 return err;
6681712d 848
5933a7bb
MR		 849 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
850 return -EAFNOSUPPORT;
851
d342894c 852 spin_lock_bh(&vxlan->hash_lock);
e4c7ed41 853 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
73cf3317 854 port, vni, ifindex, ndm->ndm_flags);
d342894c 855 spin_unlock_bh(&vxlan->hash_lock);
856
857 return err;
858}
859
860/* Delete entry (via netlink) */
1690be63
VY		 861static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
862 struct net_device *dev,
f6f6424b 863 const unsigned char *addr, u16 vid)
d342894c 864{
865 struct vxlan_dev *vxlan = netdev_priv(dev);
866 struct vxlan_fdb *f;
bc7892ba 867 struct vxlan_rdst *rd = NULL;
e4c7ed41 868 union vxlan_addr ip;
bc7892ba
MR		 869 __be16 port;
870 u32 vni, ifindex;
871 int err;
872
873 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
874 if (err)
875 return err;
876
877 err = -ENOENT;
d342894c 878
879 spin_lock_bh(&vxlan->hash_lock);
880 f = vxlan_find_mac(vxlan, addr);
bc7892ba
MR		 881 if (!f)
882 goto out;
883
e4c7ed41
CW		 884 if (!vxlan_addr_any(&ip)) {
885 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
bc7892ba
MR		 886 if (!rd)
887 goto out;
888 }
889
890 err = 0;
891
892 /* remove a destination if it's not the only one on the list,
893 * otherwise destroy the fdb entry
894 */
895 if (rd && !list_is_singular(&f->remotes)) {
896 list_del_rcu(&rd->list);
9e4b93f9 897 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
dcdc7a59 898 kfree_rcu(rd, rcu);
bc7892ba 899 goto out;
d342894c 900 }
bc7892ba
MR		 901
902 vxlan_fdb_destroy(vxlan, f);
903
904out:
d342894c 905 spin_unlock_bh(&vxlan->hash_lock);
906
907 return err;
908}
909
910/* Dump forwarding table */
911static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3
JHS		 912 struct net_device *dev,
913 struct net_device *filter_dev, int idx)
d342894c 914{
915 struct vxlan_dev *vxlan = netdev_priv(dev);
916 unsigned int h;
917
918 for (h = 0; h < FDB_HASH_SIZE; ++h) {
919 struct vxlan_fdb *f;
d342894c 920 int err;
921
b67bfe0d 922 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
6681712d 923 struct vxlan_rdst *rd;
6681712d 924
3e61aa8f 925 list_for_each_entry_rcu(rd, &f->remotes, list) {
07a51cd3
AW		 926 if (idx < cb->args[0])
927 goto skip;
928
6681712d
DS		 929 err = vxlan_fdb_info(skb, vxlan, f,
930 NETLINK_CB(cb->skb).portid,
931 cb->nlh->nlmsg_seq,
932 RTM_NEWNEIGH,
933 NLM_F_MULTI, rd);
934 if (err < 0)
3e61aa8f 935 goto out;
3e61aa8f 936skip:
07a51cd3
AW		 937 ++idx;
938 }
d342894c 939 }
940 }
3e61aa8f 941out:
d342894c 942 return idx;
943}
944
945/* Watch incoming packets to learn mapping between Ethernet address
946 * and Tunnel endpoint.
c4b49512 947 * Return true if packet is bogus and should be dropped.
d342894c 948 */
26a41ae6 949static bool vxlan_snoop(struct net_device *dev,
e4c7ed41 950 union vxlan_addr *src_ip, const u8 *src_mac)
d342894c 951{
952 struct vxlan_dev *vxlan = netdev_priv(dev);
953 struct vxlan_fdb *f;
d342894c 954
955 f = vxlan_find_mac(vxlan, src_mac);
956 if (likely(f)) {
5ca5461c 957 struct vxlan_rdst *rdst = first_remote_rcu(f);
3e61aa8f 958
e4c7ed41 959 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip)))
26a41ae6 960 return false;
961
962 /* Don't migrate static entries, drop packets */
eb064c3b 963 if (f->state & NUD_NOARP)
26a41ae6 964 return true;
d342894c 965
966 if (net_ratelimit())
967 netdev_info(dev,
e4c7ed41 968 "%pM migrated from %pIS to %pIS\n",
a4870f79 969 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
d342894c 970
e4c7ed41 971 rdst->remote_ip = *src_ip;
d342894c 972 f->updated = jiffies;
9e4b93f9 973 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
d342894c 974 } else {
975 /* learned new entry */
976 spin_lock(&vxlan->hash_lock);
3bf74b1a 977
978 /* close off race between vxlan_flush and incoming packets */
979 if (netif_running(dev))
980 vxlan_fdb_create(vxlan, src_mac, src_ip,
981 NUD_REACHABLE,
982 NLM_F_EXCL|NLM_F_CREATE,
0dfbdf41 983 vxlan->cfg.dst_port,
3bf74b1a 984 vxlan->default_dst.remote_vni,
985 0, NTF_SELF);
d342894c 986 spin_unlock(&vxlan->hash_lock);
987 }
26a41ae6 988
989 return false;
d342894c 990}
991
d342894c 992/* See if multicast group is already in use by other ID */
95ab0991 993static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
d342894c 994{
553675fb 995 struct vxlan_dev *vxlan;
b1be00a6 996 unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
d342894c 997
95ab0991
G		 998 /* The vxlan_sock is only used by dev, leaving group has
999 * no effect on other vxlan devices.
1000 */
b1be00a6
JB		 1001 if (family == AF_INET && dev->vn4_sock &&
1002 atomic_read(&dev->vn4_sock->refcnt) == 1)
95ab0991 1003 return false;
b1be00a6
JB		 1004#if IS_ENABLED(CONFIG_IPV6)
1005 if (family == AF_INET6 && dev->vn6_sock &&
1006 atomic_read(&dev->vn6_sock->refcnt) == 1)
1007 return false;
1008#endif
95ab0991 1009
553675fb 1010 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
95ab0991 1011 if (!netif_running(vxlan->dev) || vxlan == dev)
553675fb 1012 continue;
d342894c 1013
b1be00a6 1014 if (family == AF_INET && vxlan->vn4_sock != dev->vn4_sock)
95ab0991 1015 continue;
b1be00a6
JB		 1016#if IS_ENABLED(CONFIG_IPV6)
1017 if (family == AF_INET6 && vxlan->vn6_sock != dev->vn6_sock)
1018 continue;
1019#endif
95ab0991
G		 1020
1021 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1022 &dev->default_dst.remote_ip))
1023 continue;
1024
1025 if (vxlan->default_dst.remote_ifindex !=
1026 dev->default_dst.remote_ifindex)
1027 continue;
1028
1029 return true;
553675fb 1030 }
d342894c 1031
1032 return false;
1033}
1034
b1be00a6 1035static void __vxlan_sock_release(struct vxlan_sock *vs)
7c47cedf 1036{
b1be00a6 1037 struct vxlan_net *vn;
012a5729 1038
b1be00a6
JB		 1039 if (!vs)
1040 return;
7c47cedf
SH		 1041 if (!atomic_dec_and_test(&vs->refcnt))
1042 return;
d342894c 1043
b1be00a6 1044 vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id);
1c51a915 1045 spin_lock(&vn->sock_lock);
7c47cedf 1046 hlist_del_rcu(&vs->hlist);
dc01e7d3 1047 vxlan_notify_del_rx_port(vs);
1c51a915
SH		 1048 spin_unlock(&vn->sock_lock);
1049
7c47cedf 1050 queue_work(vxlan_wq, &vs->del_work);
d342894c 1051}
1052
b1be00a6
JB		 1053static void vxlan_sock_release(struct vxlan_dev *vxlan)
1054{
1055 __vxlan_sock_release(vxlan->vn4_sock);
1056#if IS_ENABLED(CONFIG_IPV6)
1057 __vxlan_sock_release(vxlan->vn6_sock);
1058#endif
1059}
1060
56ef9c90 1061/* Update multicast group membership when first VNI on
c4b49512 1062 * multicast address is brought up
7c47cedf 1063 */
56ef9c90 1064static int vxlan_igmp_join(struct vxlan_dev *vxlan)
d342894c 1065{
b1be00a6 1066 struct sock *sk;
e4c7ed41
CW		 1067 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1068 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1069 int ret = -EINVAL;
d342894c 1070
e4c7ed41
CW		 1071 if (ip->sa.sa_family == AF_INET) {
1072 struct ip_mreqn mreq = {
1073 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1074 .imr_ifindex = ifindex,
1075 };
1076
b1be00a6
JB		 1077 sk = vxlan->vn4_sock->sock->sk;
1078 lock_sock(sk);
56ef9c90 1079 ret = ip_mc_join_group(sk, &mreq);
b1be00a6 1080 release_sock(sk);
e4c7ed41
CW		 1081#if IS_ENABLED(CONFIG_IPV6)
1082 } else {
b1be00a6
JB		 1083 sk = vxlan->vn6_sock->sock->sk;
1084 lock_sock(sk);
56ef9c90
MRL		 1085 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1086 &ip->sin6.sin6_addr);
b1be00a6 1087 release_sock(sk);
e4c7ed41
CW		 1088#endif
1089 }
3fc2de2f 1090
56ef9c90 1091 return ret;
3fc2de2f 1092}
1093
1094/* Inverse of vxlan_igmp_join when last VNI is brought down */
56ef9c90 1095static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
3fc2de2f 1096{
b1be00a6 1097 struct sock *sk;
e4c7ed41
CW		 1098 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1099 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1100 int ret = -EINVAL;
3fc2de2f 1101
e4c7ed41
CW		 1102 if (ip->sa.sa_family == AF_INET) {
1103 struct ip_mreqn mreq = {
1104 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1105 .imr_ifindex = ifindex,
1106 };
1107
b1be00a6
JB		 1108 sk = vxlan->vn4_sock->sock->sk;
1109 lock_sock(sk);
56ef9c90 1110 ret = ip_mc_leave_group(sk, &mreq);
b1be00a6 1111 release_sock(sk);
e4c7ed41
CW		 1112#if IS_ENABLED(CONFIG_IPV6)
1113 } else {
b1be00a6
JB		 1114 sk = vxlan->vn6_sock->sock->sk;
1115 lock_sock(sk);
56ef9c90
MRL		 1116 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1117 &ip->sin6.sin6_addr);
b1be00a6 1118 release_sock(sk);
e4c7ed41
CW		 1119#endif
1120 }
d342894c 1121
56ef9c90 1122 return ret;
d342894c 1123}
1124
dfd8645e 1125static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh,
0ace2ca8 1126 size_t hdrlen, u32 data, bool nopartial)
dfd8645e
TH		 1127{
1128 size_t start, offset, plen;
dfd8645e 1129
b7fe10e5
TH		 1130 if (skb->remcsum_offload)
1131 return vh;
1132
dfd8645e
TH		 1133 start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
1134 offset = start + ((data & VXLAN_RCO_UDP) ?
1135 offsetof(struct udphdr, check) :
1136 offsetof(struct tcphdr, check));
1137
1138 plen = hdrlen + offset + sizeof(u16);
1139
1140 if (!pskb_may_pull(skb, plen))
1141 return NULL;
1142
1143 vh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
1144
0ace2ca8
TH		 1145 skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset,
1146 nopartial);
dfd8645e
TH		 1147
1148 return vh;
1149}
1150
614732ea
TG		 1151static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb,
1152 struct vxlan_metadata *md, u32 vni,
1153 struct metadata_dst *tun_dst)
1154{
1155 struct iphdr *oip = NULL;
1156 struct ipv6hdr *oip6 = NULL;
1157 struct vxlan_dev *vxlan;
1158 struct pcpu_sw_netstats *stats;
1159 union vxlan_addr saddr;
1160 int err = 0;
614732ea
TG		 1161
1162 /* For flow based devices, map all packets to VNI 0 */
da8b43c0 1163 if (vs->flags & VXLAN_F_COLLECT_METADATA)
614732ea
TG		 1164 vni = 0;
1165
1166 /* Is this VNI defined? */
1167 vxlan = vxlan_vs_find_vni(vs, vni);
1168 if (!vxlan)
1169 goto drop;
1170
614732ea
TG		 1171 skb_reset_mac_header(skb);
1172 skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev)));
1173 skb->protocol = eth_type_trans(skb, vxlan->dev);
1174 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1175
1176 /* Ignore packet loops (and multicast echo) */
1177 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
1178 goto drop;
1179
ce212d0f
JB		 1180 /* Get data from the outer IP header */
1181 if (vxlan_get_sk_family(vs) == AF_INET) {
614732ea
TG		 1182 oip = ip_hdr(skb);
1183 saddr.sin.sin_addr.s_addr = oip->saddr;
1184 saddr.sa.sa_family = AF_INET;
1185#if IS_ENABLED(CONFIG_IPV6)
1186 } else {
1187 oip6 = ipv6_hdr(skb);
1188 saddr.sin6.sin6_addr = oip6->saddr;
1189 saddr.sa.sa_family = AF_INET6;
1190#endif
1191 }
1192
1193 if (tun_dst) {
1194 skb_dst_set(skb, (struct dst_entry *)tun_dst);
1195 tun_dst = NULL;
1196 }
1197
1198 if ((vxlan->flags & VXLAN_F_LEARN) &&
1199 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source))
1200 goto drop;
1201
1202 skb_reset_network_header(skb);
1203 /* In flow-based mode, GBP is carried in dst_metadata */
da8b43c0 1204 if (!(vs->flags & VXLAN_F_COLLECT_METADATA))
614732ea
TG		 1205 skb->mark = md->gbp;
1206
1207 if (oip6)
1208 err = IP6_ECN_decapsulate(oip6, skb);
1209 if (oip)
1210 err = IP_ECN_decapsulate(oip, skb);
1211
1212 if (unlikely(err)) {
1213 if (log_ecn_error) {
1214 if (oip6)
1215 net_info_ratelimited("non-ECT from %pI6\n",
1216 &oip6->saddr);
1217 if (oip)
1218 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1219 &oip->saddr, oip->tos);
1220 }
1221 if (err > 1) {
1222 ++vxlan->dev->stats.rx_frame_errors;
1223 ++vxlan->dev->stats.rx_errors;
1224 goto drop;
1225 }
1226 }
1227
1228 stats = this_cpu_ptr(vxlan->dev->tstats);
1229 u64_stats_update_begin(&stats->syncp);
1230 stats->rx_packets++;
1231 stats->rx_bytes += skb->len;
1232 u64_stats_update_end(&stats->syncp);
1233
58ce31cc 1234 gro_cells_receive(&vxlan->gro_cells, skb);
614732ea
TG		 1235
1236 return;
1237drop:
1238 if (tun_dst)
1239 dst_release((struct dst_entry *)tun_dst);
1240
1241 /* Consume bad packet */
1242 kfree_skb(skb);
1243}
1244
d342894c 1245/* Callback from net/ipv4/udp.c to receive packets */
1246static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
1247{
ee122c79 1248 struct metadata_dst *tun_dst = NULL;
5cfccc5a 1249 struct vxlan_sock *vs;
d342894c 1250 struct vxlanhdr *vxh;
3bf39475 1251 u32 flags, vni;
ee122c79
TG		 1252 struct vxlan_metadata _md;
1253 struct vxlan_metadata *md = &_md;
d342894c 1254
d342894c 1255 /* Need Vxlan and inner Ethernet header to be present */
7ce04758 1256 if (!pskb_may_pull(skb, VXLAN_HLEN))
d342894c 1257 goto error;
1258
7ce04758 1259 vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
3bf39475
TH		 1260 flags = ntohl(vxh->vx_flags);
1261 vni = ntohl(vxh->vx_vni);
1262
1263 if (flags & VXLAN_HF_VNI) {
1264 flags &= ~VXLAN_HF_VNI;
1265 } else {
1266 /* VNI flag always required to be set */
1267 goto bad_flags;
d342894c 1268 }
1269
5cfccc5a
PS		 1270 if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB)))
1271 goto drop;
dfd8645e 1272 vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
5cfccc5a 1273
559835ea 1274 vs = rcu_dereference_sk_user_data(sk);
5cfccc5a 1275 if (!vs)
d342894c 1276 goto drop;
d342894c 1277
dfd8645e 1278 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
0ace2ca8
TH		 1279 vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni,
1280 !!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 1281 if (!vxh)
1282 goto drop;
1283
1284 flags &= ~VXLAN_HF_RCO;
40fb70f3 1285 vni &= VXLAN_VNI_MASK;
dfd8645e
TH		 1286 }
1287
ee122c79 1288 if (vxlan_collect_metadata(vs)) {
c29a70d2
PS		 1289 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
1290 cpu_to_be64(vni >> 8), sizeof(*md));
1291
ee122c79
TG		 1292 if (!tun_dst)
1293 goto drop;
1294
0f1b7354 1295 md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
ee122c79
TG		 1296 } else {
1297 memset(md, 0, sizeof(*md));
1298 }
1299
3511494c
TG		 1300 /* For backwards compatibility, only allow reserved fields to be
1301 * used by VXLAN extensions if explicitly requested.
1302 */
1303 if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) {
1304 struct vxlanhdr_gbp *gbp;
1305
1306 gbp = (struct vxlanhdr_gbp *)vxh;
ee122c79
TG		 1307 md->gbp = ntohs(gbp->policy_id);
1308
1309 if (tun_dst)
0f1b7354 1310 tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
3511494c
TG		 1311
1312 if (gbp->dont_learn)
ee122c79 1313 md->gbp |= VXLAN_GBP_DONT_LEARN;
3511494c
TG		 1314
1315 if (gbp->policy_applied)
ee122c79 1316 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
3511494c
TG		 1317
1318 flags &= ~VXLAN_GBP_USED_BITS;
1319 }
1320
40fb70f3 1321 if (flags || vni & ~VXLAN_VNI_MASK) {
3bf39475
TH		 1322 /* If there are any unprocessed flags remaining treat
1323 * this as a malformed packet. This behavior diverges from
1324 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1325 * in reserved fields are to be ignored. The approach here
c4b49512 1326 * maintains compatibility with previous stack code, and also
3bf39475
TH		 1327 * is more robust and provides a little more security in
1328 * adding extensions to VXLAN.
1329 */
1330
1331 goto bad_flags;
1332 }
1333
614732ea 1334 vxlan_rcv(vs, skb, md, vni >> 8, tun_dst);
5cfccc5a
PS		 1335 return 0;
1336
1337drop:
1338 /* Consume bad packet */
1339 kfree_skb(skb);
1340 return 0;
1341
3bf39475
TH		 1342bad_flags:
1343 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1344 ntohl(vxh->vx_flags), ntohl(vxh->vx_vni));
1345
5cfccc5a 1346error:
ee122c79
TG		 1347 if (tun_dst)
1348 dst_release((struct dst_entry *)tun_dst);
1349
5cfccc5a
PS		 1350 /* Return non vxlan pkt */
1351 return 1;
1352}
1353
e4f67add
DS		 1354static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
1355{
1356 struct vxlan_dev *vxlan = netdev_priv(dev);
1357 struct arphdr *parp;
1358 u8 *arpptr, *sha;
1359 __be32 sip, tip;
1360 struct neighbour *n;
1361
1362 if (dev->flags & IFF_NOARP)
1363 goto out;
1364
1365 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1366 dev->stats.tx_dropped++;
1367 goto out;
1368 }
1369 parp = arp_hdr(skb);
1370
1371 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1372 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1373 parp->ar_pro != htons(ETH_P_IP) ||
1374 parp->ar_op != htons(ARPOP_REQUEST) ||
1375 parp->ar_hln != dev->addr_len ||
1376 parp->ar_pln != 4)
1377 goto out;
1378 arpptr = (u8 *)parp + sizeof(struct arphdr);
1379 sha = arpptr;
1380 arpptr += dev->addr_len; /* sha */
1381 memcpy(&sip, arpptr, sizeof(sip));
1382 arpptr += sizeof(sip);
1383 arpptr += dev->addr_len; /* tha */
1384 memcpy(&tip, arpptr, sizeof(tip));
1385
1386 if (ipv4_is_loopback(tip) ||
1387 ipv4_is_multicast(tip))
1388 goto out;
1389
1390 n = neigh_lookup(&arp_tbl, &tip, dev);
1391
1392 if (n) {
e4f67add
DS		 1393 struct vxlan_fdb *f;
1394 struct sk_buff *reply;
1395
1396 if (!(n->nud_state & NUD_CONNECTED)) {
1397 neigh_release(n);
1398 goto out;
1399 }
1400
1401 f = vxlan_find_mac(vxlan, n->ha);
e4c7ed41 1402 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
e4f67add
DS		 1403 /* bridge-local neighbor */
1404 neigh_release(n);
1405 goto out;
1406 }
1407
1408 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1409 n->ha, sha);
1410
1411 neigh_release(n);
1412
7346135d
DS		 1413 if (reply == NULL)
1414 goto out;
1415
e4f67add
DS		 1416 skb_reset_mac_header(reply);
1417 __skb_pull(reply, skb_network_offset(reply));
1418 reply->ip_summed = CHECKSUM_UNNECESSARY;
1419 reply->pkt_type = PACKET_HOST;
1420
1421 if (netif_rx_ni(reply) == NET_RX_DROP)
1422 dev->stats.rx_dropped++;
e4c7ed41
CW		 1423 } else if (vxlan->flags & VXLAN_F_L3MISS) {
1424 union vxlan_addr ipa = {
1425 .sin.sin_addr.s_addr = tip,
a45e92a5 1426 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1427 };
1428
1429 vxlan_ip_miss(dev, &ipa);
1430 }
e4f67add
DS		 1431out:
1432 consume_skb(skb);
1433 return NETDEV_TX_OK;
1434}
1435
f564f45c 1436#if IS_ENABLED(CONFIG_IPV6)
4b29dba9
DS		 1437static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1438 struct neighbour *n, bool isrouter)
1439{
1440 struct net_device *dev = request->dev;
1441 struct sk_buff *reply;
1442 struct nd_msg *ns, *na;
1443 struct ipv6hdr *pip6;
1444 u8 *daddr;
1445 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1446 int ns_olen;
1447 int i, len;
1448
1449 if (dev == NULL)
1450 return NULL;
1451
1452 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1453 sizeof(*na) + na_olen + dev->needed_tailroom;
1454 reply = alloc_skb(len, GFP_ATOMIC);
1455 if (reply == NULL)
1456 return NULL;
1457
1458 reply->protocol = htons(ETH_P_IPV6);
1459 reply->dev = dev;
1460 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1461 skb_push(reply, sizeof(struct ethhdr));
1462 skb_set_mac_header(reply, 0);
1463
1464 ns = (struct nd_msg *)skb_transport_header(request);
1465
1466 daddr = eth_hdr(request)->h_source;
1467 ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns);
1468 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1469 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1470 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1471 break;
1472 }
1473 }
1474
1475 /* Ethernet header */
1476 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1477 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1478 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1479 reply->protocol = htons(ETH_P_IPV6);
1480
1481 skb_pull(reply, sizeof(struct ethhdr));
1482 skb_set_network_header(reply, 0);
1483 skb_put(reply, sizeof(struct ipv6hdr));
1484
1485 /* IPv6 header */
1486
1487 pip6 = ipv6_hdr(reply);
1488 memset(pip6, 0, sizeof(struct ipv6hdr));
1489 pip6->version = 6;
1490 pip6->priority = ipv6_hdr(request)->priority;
1491 pip6->nexthdr = IPPROTO_ICMPV6;
1492 pip6->hop_limit = 255;
1493 pip6->daddr = ipv6_hdr(request)->saddr;
1494 pip6->saddr = *(struct in6_addr *)n->primary_key;
1495
1496 skb_pull(reply, sizeof(struct ipv6hdr));
1497 skb_set_transport_header(reply, 0);
1498
1499 na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen);
1500
1501 /* Neighbor Advertisement */
1502 memset(na, 0, sizeof(*na)+na_olen);
1503 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1504 na->icmph.icmp6_router = isrouter;
1505 na->icmph.icmp6_override = 1;
1506 na->icmph.icmp6_solicited = 1;
1507 na->target = ns->target;
1508 ether_addr_copy(&na->opt[2], n->ha);
1509 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1510 na->opt[1] = na_olen >> 3;
1511
1512 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1513 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1514 csum_partial(na, sizeof(*na)+na_olen, 0));
1515
1516 pip6->payload_len = htons(sizeof(*na)+na_olen);
1517
1518 skb_push(reply, sizeof(struct ipv6hdr));
1519
1520 reply->ip_summed = CHECKSUM_UNNECESSARY;
1521
1522 return reply;
1523}
1524
f564f45c
CW		 1525static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
1526{
1527 struct vxlan_dev *vxlan = netdev_priv(dev);
4b29dba9 1528 struct nd_msg *msg;
f564f45c
CW		 1529 const struct ipv6hdr *iphdr;
1530 const struct in6_addr *saddr, *daddr;
4b29dba9
DS		 1531 struct neighbour *n;
1532 struct inet6_dev *in6_dev;
f564f45c
CW		 1533
1534 in6_dev = __in6_dev_get(dev);
1535 if (!in6_dev)
1536 goto out;
1537
f564f45c
CW		 1538 iphdr = ipv6_hdr(skb);
1539 saddr = &iphdr->saddr;
1540 daddr = &iphdr->daddr;
1541
f564f45c
CW		 1542 msg = (struct nd_msg *)skb_transport_header(skb);
1543 if (msg->icmph.icmp6_code != 0 ||
1544 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1545 goto out;
1546
4b29dba9
DS		 1547 if (ipv6_addr_loopback(daddr) ||
1548 ipv6_addr_is_multicast(&msg->target))
1549 goto out;
1550
1551 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
f564f45c
CW		 1552
1553 if (n) {
1554 struct vxlan_fdb *f;
4b29dba9 1555 struct sk_buff *reply;
f564f45c
CW		 1556
1557 if (!(n->nud_state & NUD_CONNECTED)) {
1558 neigh_release(n);
1559 goto out;
1560 }
1561
1562 f = vxlan_find_mac(vxlan, n->ha);
1563 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1564 /* bridge-local neighbor */
1565 neigh_release(n);
1566 goto out;
1567 }
1568
4b29dba9
DS		 1569 reply = vxlan_na_create(skb, n,
1570 !!(f ? f->flags & NTF_ROUTER : 0));
1571
f564f45c 1572 neigh_release(n);
4b29dba9
DS		 1573
1574 if (reply == NULL)
1575 goto out;
1576
1577 if (netif_rx_ni(reply) == NET_RX_DROP)
1578 dev->stats.rx_dropped++;
1579
f564f45c 1580 } else if (vxlan->flags & VXLAN_F_L3MISS) {
4b29dba9
DS		 1581 union vxlan_addr ipa = {
1582 .sin6.sin6_addr = msg->target,
a45e92a5 1583 .sin6.sin6_family = AF_INET6,
4b29dba9
DS		 1584 };
1585
f564f45c
CW		 1586 vxlan_ip_miss(dev, &ipa);
1587 }
1588
1589out:
1590 consume_skb(skb);
1591 return NETDEV_TX_OK;
1592}
1593#endif
1594
e4f67add
DS		 1595static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1596{
1597 struct vxlan_dev *vxlan = netdev_priv(dev);
1598 struct neighbour *n;
e4f67add
DS		 1599
1600 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1601 return false;
1602
1603 n = NULL;
1604 switch (ntohs(eth_hdr(skb)->h_proto)) {
1605 case ETH_P_IP:
e15a00aa
CW		 1606 {
1607 struct iphdr *pip;
1608
e4f67add
DS		 1609 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1610 return false;
1611 pip = ip_hdr(skb);
1612 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
e4c7ed41
CW		 1613 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1614 union vxlan_addr ipa = {
1615 .sin.sin_addr.s_addr = pip->daddr,
a45e92a5 1616 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1617 };
1618
1619 vxlan_ip_miss(dev, &ipa);
1620 return false;
1621 }
1622
e4f67add 1623 break;
e15a00aa
CW		 1624 }
1625#if IS_ENABLED(CONFIG_IPV6)
1626 case ETH_P_IPV6:
1627 {
1628 struct ipv6hdr *pip6;
1629
1630 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1631 return false;
1632 pip6 = ipv6_hdr(skb);
1633 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
1634 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1635 union vxlan_addr ipa = {
1636 .sin6.sin6_addr = pip6->daddr,
a45e92a5 1637 .sin6.sin6_family = AF_INET6,
e15a00aa
CW		 1638 };
1639
1640 vxlan_ip_miss(dev, &ipa);
1641 return false;
1642 }
1643
1644 break;
1645 }
1646#endif
e4f67add
DS		 1647 default:
1648 return false;
1649 }
1650
1651 if (n) {
1652 bool diff;
1653
7367d0b5 1654 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
e4f67add
DS		 1655 if (diff) {
1656 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1657 dev->addr_len);
1658 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1659 }
1660 neigh_release(n);
1661 return diff;
e4c7ed41
CW		 1662 }
1663
e4f67add
DS		 1664 return false;
1665}
1666
af33c1ad 1667static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
3511494c
TG		 1668 struct vxlan_metadata *md)
1669{
1670 struct vxlanhdr_gbp *gbp;
1671
db79a621
TG		 1672 if (!md->gbp)
1673 return;
1674
3511494c
TG		 1675 gbp = (struct vxlanhdr_gbp *)vxh;
1676 vxh->vx_flags |= htonl(VXLAN_HF_GBP);
1677
1678 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1679 gbp->dont_learn = 1;
1680
1681 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1682 gbp->policy_applied = 1;
1683
1684 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1685}
1686
e4c7ed41 1687#if IS_ENABLED(CONFIG_IPV6)
79b16aad
DM		 1688static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk,
1689 struct sk_buff *skb,
e4c7ed41
CW		 1690 struct net_device *dev, struct in6_addr *saddr,
1691 struct in6_addr *daddr, __u8 prio, __u8 ttl,
6b6948dd 1692 __be16 src_port, __be16 dst_port, __be32 vni,
b4ed5cad
JB		 1693 struct vxlan_metadata *md, bool xnet, u32 vxflags,
1694 bool udp_sum)
e4c7ed41 1695{
e4c7ed41 1696 struct vxlanhdr *vxh;
e4c7ed41
CW		 1697 int min_headroom;
1698 int err;
b4ed5cad 1699 bool nocheck = !udp_sum;
dfd8645e
TH		 1700 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
1701 u16 hdrlen = sizeof(struct vxlanhdr);
1702
af33c1ad 1703 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1704 skb->ip_summed == CHECKSUM_PARTIAL) {
1705 int csum_start = skb_checksum_start_offset(skb);
1706
1707 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1708 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1709 (skb->csum_offset == offsetof(struct udphdr, check) ||
1710 skb->csum_offset == offsetof(struct tcphdr, check))) {
1711 udp_sum = false;
1712 type |= SKB_GSO_TUNNEL_REMCSUM;
1713 }
1714 }
e4c7ed41 1715
f01ec1c0 1716 skb_scrub_packet(skb, xnet);
963a88b3 1717
e4c7ed41
CW		 1718 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
1719 + VXLAN_HLEN + sizeof(struct ipv6hdr)
df8a39de 1720 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
e4c7ed41
CW		 1721
1722 /* Need space for new headers (invalidates iph ptr) */
1723 err = skb_cow_head(skb, min_headroom);
74f47278
PS		 1724 if (unlikely(err)) {
1725 kfree_skb(skb);
1726 goto err;
1727 }
e4c7ed41 1728
5968250c 1729 skb = vlan_hwaccel_push_inside(skb);
74f47278
PS		 1730 if (WARN_ON(!skb)) {
1731 err = -ENOMEM;
1732 goto err;
1733 }
e4c7ed41 1734
b736a623
JG		 1735 skb = iptunnel_handle_offloads(skb, udp_sum, type);
1736 if (IS_ERR(skb)) {
1737 err = -EINVAL;
1738 goto err;
1739 }
1740
e4c7ed41 1741 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
3bf39475 1742 vxh->vx_flags = htonl(VXLAN_HF_VNI);
614732ea 1743 vxh->vx_vni = vni;
e4c7ed41 1744
dfd8645e
TH		 1745 if (type & SKB_GSO_TUNNEL_REMCSUM) {
1746 u32 data = (skb_checksum_start_offset(skb) - hdrlen) >>
1747 VXLAN_RCO_SHIFT;
1748
1749 if (skb->csum_offset == offsetof(struct udphdr, check))
1750 data |= VXLAN_RCO_UDP;
1751
1752 vxh->vx_vni |= htonl(data);
1753 vxh->vx_flags |= htonl(VXLAN_HF_RCO);
1754
1755 if (!skb_is_gso(skb)) {
1756 skb->ip_summed = CHECKSUM_NONE;
1757 skb->encapsulation = 0;
1758 }
1759 }
1760
af33c1ad
TH		 1761 if (vxflags & VXLAN_F_GBP)
1762 vxlan_build_gbp_hdr(vxh, vxflags, md);
3511494c 1763
996c9fd1
TH		 1764 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1765
79b16aad 1766 udp_tunnel6_xmit_skb(dst, sk, skb, dev, saddr, daddr, prio,
b4ed5cad 1767 ttl, src_port, dst_port, nocheck);
e4c7ed41 1768 return 0;
74f47278
PS		 1769err:
1770 dst_release(dst);
1771 return err;
e4c7ed41
CW		 1772}
1773#endif
1774
614732ea
TG		 1775static int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
1776 __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
6b6948dd 1777 __be16 src_port, __be16 dst_port, __be32 vni,
b4ed5cad
JB		 1778 struct vxlan_metadata *md, bool xnet, u32 vxflags,
1779 bool udp_sum)
49560532
PS		 1780{
1781 struct vxlanhdr *vxh;
649c5b8b 1782 int min_headroom;
49560532 1783 int err;
b4ed5cad 1784 bool nocheck = !udp_sum;
dfd8645e
TH		 1785 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
1786 u16 hdrlen = sizeof(struct vxlanhdr);
1787
af33c1ad 1788 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1789 skb->ip_summed == CHECKSUM_PARTIAL) {
1790 int csum_start = skb_checksum_start_offset(skb);
1791
1792 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1793 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1794 (skb->csum_offset == offsetof(struct udphdr, check) ||
1795 skb->csum_offset == offsetof(struct tcphdr, check))) {
1796 udp_sum = false;
1797 type |= SKB_GSO_TUNNEL_REMCSUM;
1798 }
1799 }
49560532 1800
649c5b8b 1801 min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len
1eaa8178 1802 + VXLAN_HLEN + sizeof(struct iphdr)
df8a39de 1803 + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
649c5b8b
PS		 1804
1805 /* Need space for new headers (invalidates iph ptr) */
1806 err = skb_cow_head(skb, min_headroom);
74f47278
PS		 1807 if (unlikely(err)) {
1808 kfree_skb(skb);
649c5b8b 1809 return err;
74f47278 1810 }
649c5b8b 1811
5968250c
JP		 1812 skb = vlan_hwaccel_push_inside(skb);
1813 if (WARN_ON(!skb))
1814 return -ENOMEM;
1eaa8178 1815
b736a623
JG		 1816 skb = iptunnel_handle_offloads(skb, udp_sum, type);
1817 if (IS_ERR(skb))
1818 return PTR_ERR(skb);
1819
49560532 1820 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
3bf39475 1821 vxh->vx_flags = htonl(VXLAN_HF_VNI);
614732ea 1822 vxh->vx_vni = vni;
49560532 1823
dfd8645e
TH		 1824 if (type & SKB_GSO_TUNNEL_REMCSUM) {
1825 u32 data = (skb_checksum_start_offset(skb) - hdrlen) >>
1826 VXLAN_RCO_SHIFT;
1827
1828 if (skb->csum_offset == offsetof(struct udphdr, check))
1829 data |= VXLAN_RCO_UDP;
1830
1831 vxh->vx_vni |= htonl(data);
1832 vxh->vx_flags |= htonl(VXLAN_HF_RCO);
1833
1834 if (!skb_is_gso(skb)) {
1835 skb->ip_summed = CHECKSUM_NONE;
1836 skb->encapsulation = 0;
1837 }
1838 }
1839
af33c1ad
TH		 1840 if (vxflags & VXLAN_F_GBP)
1841 vxlan_build_gbp_hdr(vxh, vxflags, md);
3511494c 1842
996c9fd1
TH		 1843 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
1844
039f5062 1845 udp_tunnel_xmit_skb(rt, sk, skb, src, dst, tos, ttl, df,
b4ed5cad 1846 src_port, dst_port, xnet, nocheck);
039f5062 1847 return 0;
49560532 1848}
49560532 1849
1a8496ba
JB		 1850static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan,
1851 struct sk_buff *skb, int oif, u8 tos,
1852 __be32 daddr, __be32 *saddr)
1853{
1854 struct rtable *rt = NULL;
1855 struct flowi4 fl4;
1856
1857 memset(&fl4, 0, sizeof(fl4));
1858 fl4.flowi4_oif = oif;
1859 fl4.flowi4_tos = RT_TOS(tos);
1860 fl4.flowi4_mark = skb->mark;
1861 fl4.flowi4_proto = IPPROTO_UDP;
1862 fl4.daddr = daddr;
1863 fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr;
1864
1865 rt = ip_route_output_key(vxlan->net, &fl4);
1866 if (!IS_ERR(rt))
1867 *saddr = fl4.saddr;
1868 return rt;
1869}
1870
e5d4b29f
JB		 1871#if IS_ENABLED(CONFIG_IPV6)
1872static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
1873 struct sk_buff *skb, int oif,
1874 const struct in6_addr *daddr,
1875 struct in6_addr *saddr)
1876{
1877 struct dst_entry *ndst;
1878 struct flowi6 fl6;
1879 int err;
1880
1881 memset(&fl6, 0, sizeof(fl6));
1882 fl6.flowi6_oif = oif;
1883 fl6.daddr = *daddr;
1884 fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr;
1885 fl6.flowi6_mark = skb->mark;
1886 fl6.flowi6_proto = IPPROTO_UDP;
1887
1888 err = ipv6_stub->ipv6_dst_lookup(vxlan->net,
1889 vxlan->vn6_sock->sock->sk,
1890 &ndst, &fl6);
1891 if (err < 0)
1892 return ERR_PTR(err);
1893
1894 *saddr = fl6.saddr;
1895 return ndst;
1896}
1897#endif
1898
9dcc71e1
SS		 1899/* Bypass encapsulation if the destination is local */
1900static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
1901 struct vxlan_dev *dst_vxlan)
1902{
8f84985f 1903 struct pcpu_sw_netstats *tx_stats, *rx_stats;
e4c7ed41
CW		 1904 union vxlan_addr loopback;
1905 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
ce6502a8
LR		 1906 struct net_device *dev = skb->dev;
1907 int len = skb->len;
9dcc71e1 1908
8f84985f
LR		 1909 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
1910 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
9dcc71e1
SS		 1911 skb->pkt_type = PACKET_HOST;
1912 skb->encapsulation = 0;
1913 skb->dev = dst_vxlan->dev;
1914 __skb_pull(skb, skb_network_offset(skb));
1915
e4c7ed41
CW		 1916 if (remote_ip->sa.sa_family == AF_INET) {
1917 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1918 loopback.sa.sa_family = AF_INET;
1919#if IS_ENABLED(CONFIG_IPV6)
1920 } else {
1921 loopback.sin6.sin6_addr = in6addr_loopback;
1922 loopback.sa.sa_family = AF_INET6;
1923#endif
1924 }
1925
9dcc71e1 1926 if (dst_vxlan->flags & VXLAN_F_LEARN)
e4c7ed41 1927 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
9dcc71e1
SS		 1928
1929 u64_stats_update_begin(&tx_stats->syncp);
1930 tx_stats->tx_packets++;
ce6502a8 1931 tx_stats->tx_bytes += len;
9dcc71e1
SS		 1932 u64_stats_update_end(&tx_stats->syncp);
1933
1934 if (netif_rx(skb) == NET_RX_SUCCESS) {
1935 u64_stats_update_begin(&rx_stats->syncp);
1936 rx_stats->rx_packets++;
ce6502a8 1937 rx_stats->rx_bytes += len;
9dcc71e1
SS		 1938 u64_stats_update_end(&rx_stats->syncp);
1939 } else {
ce6502a8 1940 dev->stats.rx_dropped++;
9dcc71e1
SS		 1941 }
1942}
1943
4ad16930
SH		 1944static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
1945 struct vxlan_rdst *rdst, bool did_rsc)
d342894c 1946{
3093fbe7 1947 struct ip_tunnel_info *info;
d342894c 1948 struct vxlan_dev *vxlan = netdev_priv(dev);
b1be00a6 1949 struct sock *sk;
e4c7ed41 1950 struct rtable *rt = NULL;
d342894c 1951 const struct iphdr *old_iph;
e4c7ed41 1952 union vxlan_addr *dst;
ee122c79
TG		 1953 union vxlan_addr remote_ip;
1954 struct vxlan_metadata _md;
1955 struct vxlan_metadata *md = &_md;
e4c7ed41 1956 __be16 src_port = 0, dst_port;
234f5b73 1957 u32 vni;
d342894c 1958 __be16 df = 0;
1959 __u8 tos, ttl;
0e6fbc5b 1960 int err;
ee122c79 1961 u32 flags = vxlan->flags;
b4ed5cad 1962 bool udp_sum = false;
d342894c 1963
61adedf3 1964 info = skb_tunnel_info(skb);
3093fbe7 1965
ee122c79 1966 if (rdst) {
0dfbdf41 1967 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
ee122c79
TG		 1968 vni = rdst->remote_vni;
1969 dst = &rdst->remote_ip;
1970 } else {
1971 if (!info) {
1972 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
1973 dev->name);
1974 goto drop;
1975 }
0dfbdf41 1976 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
ee122c79 1977 vni = be64_to_cpu(info->key.tun_id);
b1be00a6
JB		 1978 remote_ip.sa.sa_family = ip_tunnel_info_af(info);
1979 if (remote_ip.sa.sa_family == AF_INET)
a725e514
JB		 1980 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
1981 else
1982 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
ee122c79
TG		 1983 dst = &remote_ip;
1984 }
e4f67add 1985
e4c7ed41 1986 if (vxlan_addr_any(dst)) {
e4f67add 1987 if (did_rsc) {
e4f67add 1988 /* short-circuited back to local bridge */
9dcc71e1 1989 vxlan_encap_bypass(skb, vxlan, vxlan);
4ad16930 1990 return;
e4f67add 1991 }
ef59febe 1992 goto drop;
e4f67add 1993 }
ef59febe 1994
d342894c 1995 old_iph = ip_hdr(skb);
1996
0dfbdf41 1997 ttl = vxlan->cfg.ttl;
e4c7ed41 1998 if (!ttl && vxlan_addr_multicast(dst))
d342894c 1999 ttl = 1;
2000
0dfbdf41 2001 tos = vxlan->cfg.tos;
d342894c 2002 if (tos == 1)
206aaafc 2003 tos = ip_tunnel_get_dsfield(old_iph, skb);
d342894c 2004
0dfbdf41
TG		 2005 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2006 vxlan->cfg.port_max, true);
d342894c 2007
a725e514 2008 if (info) {
a725e514
JB		 2009 ttl = info->key.ttl;
2010 tos = info->key.tos;
b4ed5cad 2011 udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
a725e514
JB		 2012
2013 if (info->options_len)
4c222798 2014 md = ip_tunnel_info_opts(info);
a725e514
JB		 2015 } else {
2016 md->gbp = skb->mark;
2017 }
2018
e4c7ed41 2019 if (dst->sa.sa_family == AF_INET) {
1a8496ba
JB		 2020 __be32 saddr;
2021
b1be00a6
JB		 2022 if (!vxlan->vn4_sock)
2023 goto drop;
2024 sk = vxlan->vn4_sock->sock->sk;
2025
35e2d115
JG		 2026 if (info) {
2027 if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)
2028 df = htons(IP_DF);
b4ed5cad
JB		 2029 } else {
2030 udp_sum = !!(flags & VXLAN_F_UDP_CSUM);
35e2d115 2031 }
ee122c79 2032
1a8496ba
JB		 2033 rt = vxlan_get_route(vxlan, skb,
2034 rdst ? rdst->remote_ifindex : 0, tos,
2035 dst->sin.sin_addr.s_addr, &saddr);
e4c7ed41
CW		 2036 if (IS_ERR(rt)) {
2037 netdev_dbg(dev, "no route to %pI4\n",
2038 &dst->sin.sin_addr.s_addr);
2039 dev->stats.tx_carrier_errors++;
2040 goto tx_error;
2041 }
d342894c 2042
e4c7ed41
CW		 2043 if (rt->dst.dev == dev) {
2044 netdev_dbg(dev, "circular route to %pI4\n",
2045 &dst->sin.sin_addr.s_addr);
2046 dev->stats.collisions++;
fffc15a5 2047 goto rt_tx_error;
e4c7ed41
CW		 2048 }
2049
2050 /* Bypass encapsulation if the destination is local */
2051 if (rt->rt_flags & RTCF_LOCAL &&
2052 !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
2053 struct vxlan_dev *dst_vxlan;
2054
2055 ip_rt_put(rt);
19ca9fc1 2056 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 2057 dst->sa.sa_family, dst_port,
2058 vxlan->flags);
e4c7ed41
CW		 2059 if (!dst_vxlan)
2060 goto tx_error;
2061 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2062 return;
2063 }
2064
2065 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2066 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
1a8496ba 2067 err = vxlan_xmit_skb(rt, sk, skb, saddr,
af33c1ad 2068 dst->sin.sin_addr.s_addr, tos, ttl, df,
614732ea 2069 src_port, dst_port, htonl(vni << 8), md,
af33c1ad 2070 !net_eq(vxlan->net, dev_net(vxlan->dev)),
b4ed5cad 2071 flags, udp_sum);
74f47278
PS		 2072 if (err < 0) {
2073 /* skb is already freed. */
2074 skb = NULL;
e4c7ed41 2075 goto rt_tx_error;
74f47278 2076 }
e4c7ed41
CW		 2077#if IS_ENABLED(CONFIG_IPV6)
2078 } else {
e4c7ed41 2079 struct dst_entry *ndst;
e5d4b29f 2080 struct in6_addr saddr;
6f264e47 2081 u32 rt6i_flags;
e4c7ed41 2082
b1be00a6
JB		 2083 if (!vxlan->vn6_sock)
2084 goto drop;
2085 sk = vxlan->vn6_sock->sock->sk;
2086
e5d4b29f
JB		 2087 ndst = vxlan6_get_route(vxlan, skb,
2088 rdst ? rdst->remote_ifindex : 0,
2089 &dst->sin6.sin6_addr, &saddr);
2090 if (IS_ERR(ndst)) {
e4c7ed41
CW		 2091 netdev_dbg(dev, "no route to %pI6\n",
2092 &dst->sin6.sin6_addr);
2093 dev->stats.tx_carrier_errors++;
9dcc71e1 2094 goto tx_error;
e4c7ed41 2095 }
d342894c 2096
e4c7ed41
CW		 2097 if (ndst->dev == dev) {
2098 netdev_dbg(dev, "circular route to %pI6\n",
2099 &dst->sin6.sin6_addr);
2100 dst_release(ndst);
2101 dev->stats.collisions++;
2102 goto tx_error;
2103 }
0e6fbc5b 2104
e4c7ed41 2105 /* Bypass encapsulation if the destination is local */
6f264e47
JB		 2106 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
2107 if (rt6i_flags & RTF_LOCAL &&
2108 !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
e4c7ed41
CW		 2109 struct vxlan_dev *dst_vxlan;
2110
2111 dst_release(ndst);
19ca9fc1 2112 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
ac5132d1
TG		 2113 dst->sa.sa_family, dst_port,
2114 vxlan->flags);
e4c7ed41
CW		 2115 if (!dst_vxlan)
2116 goto tx_error;
2117 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
2118 return;
2119 }
49560532 2120
b4ed5cad
JB		 2121 if (!info)
2122 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
35e2d115 2123
e4c7ed41 2124 ttl = ttl ? : ip6_dst_hoplimit(ndst);
e5d4b29f 2125 err = vxlan6_xmit_skb(ndst, sk, skb, dev, &saddr, &dst->sin6.sin6_addr,
614732ea 2126 0, ttl, src_port, dst_port, htonl(vni << 8), md,
af33c1ad 2127 !net_eq(vxlan->net, dev_net(vxlan->dev)),
b4ed5cad 2128 flags, udp_sum);
e4c7ed41
CW		 2129#endif
2130 }
0e6fbc5b 2131
4ad16930 2132 return;
d342894c 2133
2134drop:
2135 dev->stats.tx_dropped++;
2136 goto tx_free;
2137
49560532
PS		 2138rt_tx_error:
2139 ip_rt_put(rt);
d342894c 2140tx_error:
2141 dev->stats.tx_errors++;
2142tx_free:
2143 dev_kfree_skb(skb);
d342894c 2144}
2145
6681712d
DS		 2146/* Transmit local packets over Vxlan
2147 *
2148 * Outer IP header inherits ECN and DF from inner header.
2149 * Outer UDP destination is the VXLAN assigned port.
2150 * source port is based on hash of flow
2151 */
2152static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2153{
2154 struct vxlan_dev *vxlan = netdev_priv(dev);
3093fbe7 2155 const struct ip_tunnel_info *info;
6681712d
DS		 2156 struct ethhdr *eth;
2157 bool did_rsc = false;
8f646c92 2158 struct vxlan_rdst *rdst, *fdst = NULL;
6681712d 2159 struct vxlan_fdb *f;
6681712d 2160
61adedf3 2161 info = skb_tunnel_info(skb);
3093fbe7 2162
6681712d
DS		 2163 skb_reset_mac_header(skb);
2164 eth = eth_hdr(skb);
2165
f564f45c
CW		 2166 if ((vxlan->flags & VXLAN_F_PROXY)) {
2167 if (ntohs(eth->h_proto) == ETH_P_ARP)
2168 return arp_reduce(dev, skb);
2169#if IS_ENABLED(CONFIG_IPV6)
2170 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
91269e39
LR		 2171 pskb_may_pull(skb, sizeof(struct ipv6hdr)
2172 + sizeof(struct nd_msg)) &&
f564f45c
CW		 2173 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2174 struct nd_msg *msg;
2175
2176 msg = (struct nd_msg *)skb_transport_header(skb);
2177 if (msg->icmph.icmp6_code == 0 &&
2178 msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
2179 return neigh_reduce(dev, skb);
2180 }
7a9f526f 2181 eth = eth_hdr(skb);
f564f45c
CW		 2182#endif
2183 }
6681712d 2184
da8b43c0 2185 if (vxlan->flags & VXLAN_F_COLLECT_METADATA &&
46fa062a 2186 info && info->mode & IP_TUNNEL_INFO_TX) {
ee122c79
TG		 2187 vxlan_xmit_one(skb, dev, NULL, false);
2188 return NETDEV_TX_OK;
2189 }
2190
6681712d 2191 f = vxlan_find_mac(vxlan, eth->h_dest);
ae884082
DS		 2192 did_rsc = false;
2193
2194 if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) &&
e15a00aa
CW		 2195 (ntohs(eth->h_proto) == ETH_P_IP ||
2196 ntohs(eth->h_proto) == ETH_P_IPV6)) {
ae884082
DS		 2197 did_rsc = route_shortcircuit(dev, skb);
2198 if (did_rsc)
2199 f = vxlan_find_mac(vxlan, eth->h_dest);
2200 }
2201
6681712d 2202 if (f == NULL) {
afbd8bae
MR		 2203 f = vxlan_find_mac(vxlan, all_zeros_mac);
2204 if (f == NULL) {
2205 if ((vxlan->flags & VXLAN_F_L2MISS) &&
2206 !is_multicast_ether_addr(eth->h_dest))
2207 vxlan_fdb_miss(vxlan, eth->h_dest);
2208
2209 dev->stats.tx_dropped++;
8f646c92 2210 kfree_skb(skb);
afbd8bae
MR		 2211 return NETDEV_TX_OK;
2212 }
2213 }
6681712d 2214
afbd8bae
MR		 2215 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2216 struct sk_buff *skb1;
6681712d 2217
8f646c92
ED		 2218 if (!fdst) {
2219 fdst = rdst;
2220 continue;
2221 }
afbd8bae
MR		 2222 skb1 = skb_clone(skb, GFP_ATOMIC);
2223 if (skb1)
2224 vxlan_xmit_one(skb1, dev, rdst, did_rsc);
6681712d
DS		 2225 }
2226
8f646c92
ED		 2227 if (fdst)
2228 vxlan_xmit_one(skb, dev, fdst, did_rsc);
2229 else
2230 kfree_skb(skb);
4ad16930 2231 return NETDEV_TX_OK;
6681712d
DS		 2232}
2233
d342894c 2234/* Walk the forwarding table and purge stale entries */
2235static void vxlan_cleanup(unsigned long arg)
2236{
2237 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
2238 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2239 unsigned int h;
2240
2241 if (!netif_running(vxlan->dev))
2242 return;
2243
d342894c 2244 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2245 struct hlist_node *p, *n;
14e1d0fa
SD		 2246
2247 spin_lock_bh(&vxlan->hash_lock);
d342894c 2248 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2249 struct vxlan_fdb *f
2250 = container_of(p, struct vxlan_fdb, hlist);
2251 unsigned long timeout;
2252
3c172868 2253 if (f->state & NUD_PERMANENT)
d342894c 2254 continue;
2255
0dfbdf41 2256 timeout = f->used + vxlan->cfg.age_interval * HZ;
d342894c 2257 if (time_before_eq(timeout, jiffies)) {
2258 netdev_dbg(vxlan->dev,
2259 "garbage collect %pM\n",
2260 f->eth_addr);
2261 f->state = NUD_STALE;
2262 vxlan_fdb_destroy(vxlan, f);
2263 } else if (time_before(timeout, next_timer))
2264 next_timer = timeout;
2265 }
14e1d0fa 2266 spin_unlock_bh(&vxlan->hash_lock);
d342894c 2267 }
d342894c 2268
2269 mod_timer(&vxlan->age_timer, next_timer);
2270}
2271
9c2e24e1
PS		 2272static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
2273{
56ef9c90 2274 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
9c2e24e1
PS		 2275 __u32 vni = vxlan->default_dst.remote_vni;
2276
56ef9c90 2277 spin_lock(&vn->sock_lock);
9c2e24e1 2278 hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
56ef9c90 2279 spin_unlock(&vn->sock_lock);
9c2e24e1
PS		 2280}
2281
d342894c 2282/* Setup stats when device is created */
2283static int vxlan_init(struct net_device *dev)
2284{
1c213bd2 2285 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
e8171045 2286 if (!dev->tstats)
d342894c 2287 return -ENOMEM;
2288
2289 return 0;
2290}
2291
ba609e9b 2292static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan)
afbd8bae
MR		 2293{
2294 struct vxlan_fdb *f;
2295
2296 spin_lock_bh(&vxlan->hash_lock);
2297 f = __vxlan_find_mac(vxlan, all_zeros_mac);
2298 if (f)
2299 vxlan_fdb_destroy(vxlan, f);
2300 spin_unlock_bh(&vxlan->hash_lock);
2301}
2302
ebf4063e
SH		 2303static void vxlan_uninit(struct net_device *dev)
2304{
2305 struct vxlan_dev *vxlan = netdev_priv(dev);
ebf4063e 2306
ba609e9b 2307 vxlan_fdb_delete_default(vxlan);
afbd8bae 2308
ebf4063e
SH		 2309 free_percpu(dev->tstats);
2310}
2311
d342894c 2312/* Start ageing timer and join group when device is brought up */
2313static int vxlan_open(struct net_device *dev)
2314{
2315 struct vxlan_dev *vxlan = netdev_priv(dev);
205f356d 2316 int ret;
56ef9c90 2317
205f356d
JB		 2318 ret = vxlan_sock_add(vxlan);
2319 if (ret < 0)
2320 return ret;
d342894c 2321
79d4a94f 2322 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
56ef9c90 2323 ret = vxlan_igmp_join(vxlan);
bef0057b
MRL		 2324 if (ret == -EADDRINUSE)
2325 ret = 0;
56ef9c90 2326 if (ret) {
205f356d 2327 vxlan_sock_release(vxlan);
56ef9c90
MRL		 2328 return ret;
2329 }
d342894c 2330 }
2331
0dfbdf41 2332 if (vxlan->cfg.age_interval)
d342894c 2333 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2334
56ef9c90 2335 return ret;
d342894c 2336}
2337
2338/* Purge the forwarding table */
2339static void vxlan_flush(struct vxlan_dev *vxlan)
2340{
31fec5aa 2341 unsigned int h;
d342894c 2342
2343 spin_lock_bh(&vxlan->hash_lock);
2344 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2345 struct hlist_node *p, *n;
2346 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2347 struct vxlan_fdb *f
2348 = container_of(p, struct vxlan_fdb, hlist);
afbd8bae
MR		 2349 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2350 if (!is_zero_ether_addr(f->eth_addr))
2351 vxlan_fdb_destroy(vxlan, f);
d342894c 2352 }
2353 }
2354 spin_unlock_bh(&vxlan->hash_lock);
2355}
2356
2357/* Cleanup timer and forwarding table on shutdown */
2358static int vxlan_stop(struct net_device *dev)
2359{
2360 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2361 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
56ef9c90 2362 int ret = 0;
d342894c 2363
24c0e683 2364 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
f13b1689 2365 !vxlan_group_used(vn, vxlan))
56ef9c90 2366 ret = vxlan_igmp_leave(vxlan);
d342894c 2367
2368 del_timer_sync(&vxlan->age_timer);
2369
2370 vxlan_flush(vxlan);
205f356d 2371 vxlan_sock_release(vxlan);
d342894c 2372
56ef9c90 2373 return ret;
d342894c 2374}
2375
d342894c 2376/* Stub, nothing needs to be done. */
2377static void vxlan_set_multicast_list(struct net_device *dev)
2378{
2379}
2380
345010b5
DB		 2381static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
2382{
2383 struct vxlan_dev *vxlan = netdev_priv(dev);
2384 struct vxlan_rdst *dst = &vxlan->default_dst;
2385 struct net_device *lowerdev;
2386 int max_mtu;
2387
f01ec1c0 2388 lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex);
345010b5
DB		 2389 if (lowerdev == NULL)
2390 return eth_change_mtu(dev, new_mtu);
2391
2392 if (dst->remote_ip.sa.sa_family == AF_INET6)
2393 max_mtu = lowerdev->mtu - VXLAN6_HEADROOM;
2394 else
2395 max_mtu = lowerdev->mtu - VXLAN_HEADROOM;
2396
2397 if (new_mtu < 68 || new_mtu > max_mtu)
2398 return -EINVAL;
2399
2400 dev->mtu = new_mtu;
2401 return 0;
2402}
2403
fc4099f1
PS		 2404static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
2405{
2406 struct vxlan_dev *vxlan = netdev_priv(dev);
2407 struct ip_tunnel_info *info = skb_tunnel_info(skb);
2408 __be16 sport, dport;
2409
2410 sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2411 vxlan->cfg.port_max, true);
2412 dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
2413
239e944f 2414 if (ip_tunnel_info_af(info) == AF_INET) {
1a8496ba
JB		 2415 struct rtable *rt;
2416
239e944f
JB		 2417 if (!vxlan->vn4_sock)
2418 return -EINVAL;
1a8496ba
JB		 2419 rt = vxlan_get_route(vxlan, skb, 0, info->key.tos,
2420 info->key.u.ipv4.dst,
2421 &info->key.u.ipv4.src);
2422 if (IS_ERR(rt))
2423 return PTR_ERR(rt);
2424 ip_rt_put(rt);
239e944f
JB		 2425 } else {
2426#if IS_ENABLED(CONFIG_IPV6)
2427 struct dst_entry *ndst;
2428
2429 if (!vxlan->vn6_sock)
2430 return -EINVAL;
2431 ndst = vxlan6_get_route(vxlan, skb, 0,
2432 &info->key.u.ipv6.dst,
2433 &info->key.u.ipv6.src);
2434 if (IS_ERR(ndst))
2435 return PTR_ERR(ndst);
2436 dst_release(ndst);
239e944f
JB		 2437#else /* !CONFIG_IPV6 */
2438 return -EPFNOSUPPORT;
2439#endif
2440 }
1a8496ba
JB		 2441 info->key.tp_src = sport;
2442 info->key.tp_dst = dport;
239e944f 2443 return 0;
fc4099f1
PS		 2444}
2445
d342894c 2446static const struct net_device_ops vxlan_netdev_ops = {
2447 .ndo_init = vxlan_init,
ebf4063e 2448 .ndo_uninit = vxlan_uninit,
d342894c 2449 .ndo_open = vxlan_open,
2450 .ndo_stop = vxlan_stop,
2451 .ndo_start_xmit = vxlan_xmit,
e8171045 2452 .ndo_get_stats64 = ip_tunnel_get_stats64,
d342894c 2453 .ndo_set_rx_mode = vxlan_set_multicast_list,
345010b5 2454 .ndo_change_mtu = vxlan_change_mtu,
d342894c 2455 .ndo_validate_addr = eth_validate_addr,
2456 .ndo_set_mac_address = eth_mac_addr,
2457 .ndo_fdb_add = vxlan_fdb_add,
2458 .ndo_fdb_del = vxlan_fdb_delete,
2459 .ndo_fdb_dump = vxlan_fdb_dump,
fc4099f1 2460 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
d342894c 2461};
2462
2463/* Info for udev, that this is a virtual tunnel endpoint */
2464static struct device_type vxlan_type = {
2465 .name = "vxlan",
2466};
2467
53cf5275 2468/* Calls the ndo_add_vxlan_port of the caller in order to
35e42379
JG		 2469 * supply the listening VXLAN udp ports. Callers are expected
2470 * to implement the ndo_add_vxlan_port.
53cf5275
JG		 2471 */
2472void vxlan_get_rx_port(struct net_device *dev)
2473{
2474 struct vxlan_sock *vs;
2475 struct net *net = dev_net(dev);
2476 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2477 sa_family_t sa_family;
35e42379
JG		 2478 __be16 port;
2479 unsigned int i;
53cf5275
JG		 2480
2481 spin_lock(&vn->sock_lock);
2482 for (i = 0; i < PORT_HASH_SIZE; ++i) {
35e42379
JG		 2483 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2484 port = inet_sk(vs->sock->sk)->inet_sport;
705cc62f 2485 sa_family = vxlan_get_sk_family(vs);
53cf5275
JG		 2486 dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family,
2487 port);
2488 }
2489 }
2490 spin_unlock(&vn->sock_lock);
2491}
2492EXPORT_SYMBOL_GPL(vxlan_get_rx_port);
2493
d342894c 2494/* Initialize the device structure. */
2495static void vxlan_setup(struct net_device *dev)
2496{
2497 struct vxlan_dev *vxlan = netdev_priv(dev);
31fec5aa 2498 unsigned int h;
d342894c 2499
2500 eth_hw_addr_random(dev);
2501 ether_setup(dev);
2502
2503 dev->netdev_ops = &vxlan_netdev_ops;
ebf4063e 2504 dev->destructor = free_netdev;
d342894c 2505 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2506
d342894c 2507 dev->features |= NETIF_F_LLTX;
d6727fe3 2508 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
0afb1666 2509 dev->features |= NETIF_F_RXCSUM;
05c0db08 2510 dev->features |= NETIF_F_GSO_SOFTWARE;
0afb1666 2511
1eaa8178
PS		 2512 dev->vlan_features = dev->features;
2513 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
0afb1666 2514 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
05c0db08 2515 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1eaa8178 2516 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
02875878 2517 netif_keep_dst(dev);
22dba393 2518 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
d342894c 2519
553675fb 2520 INIT_LIST_HEAD(&vxlan->next);
d342894c 2521 spin_lock_init(&vxlan->hash_lock);
2522
2523 init_timer_deferrable(&vxlan->age_timer);
2524 vxlan->age_timer.function = vxlan_cleanup;
2525 vxlan->age_timer.data = (unsigned long) vxlan;
2526
0dfbdf41 2527 vxlan->cfg.dst_port = htons(vxlan_port);
05f47d69 2528
d342894c 2529 vxlan->dev = dev;
2530
58ce31cc
TH		 2531 gro_cells_init(&vxlan->gro_cells, dev);
2532
d342894c 2533 for (h = 0; h < FDB_HASH_SIZE; ++h)
2534 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2535}
2536
2537static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2538 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
5d174dd8 2539 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
e4c7ed41 2540 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
d342894c 2541 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2542 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
e4c7ed41 2543 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
d342894c 2544 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2545 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
2546 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2547 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2548 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
05f47d69 2549 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
e4f67add
DS		 2550 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2551 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2552 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2553 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
f8a9b1bc 2554 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
823aa873 2555 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
5c91ae08
TH		 2556 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2557 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2558 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
dfd8645e
TH		 2559 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2560 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
3511494c 2561 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
0ace2ca8 2562 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
d342894c 2563};
2564
2565static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
2566{
2567 if (tb[IFLA_ADDRESS]) {
2568 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2569 pr_debug("invalid link address (not ethernet)\n");
2570 return -EINVAL;
2571 }
2572
2573 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2574 pr_debug("invalid all zero ethernet address\n");
2575 return -EADDRNOTAVAIL;
2576 }
2577 }
2578
2579 if (!data)
2580 return -EINVAL;
2581
2582 if (data[IFLA_VXLAN_ID]) {
2583 __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2584 if (id >= VXLAN_VID_MASK)
2585 return -ERANGE;
2586 }
2587
05f47d69 2588 if (data[IFLA_VXLAN_PORT_RANGE]) {
2589 const struct ifla_vxlan_port_range *p
2590 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2591
2592 if (ntohs(p->high) < ntohs(p->low)) {
2593 pr_debug("port range %u .. %u not valid\n",
2594 ntohs(p->low), ntohs(p->high));
2595 return -EINVAL;
2596 }
2597 }
2598
d342894c 2599 return 0;
2600}
2601
1b13c97f
YB		 2602static void vxlan_get_drvinfo(struct net_device *netdev,
2603 struct ethtool_drvinfo *drvinfo)
2604{
2605 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2606 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2607}
2608
2609static const struct ethtool_ops vxlan_ethtool_ops = {
2610 .get_drvinfo = vxlan_get_drvinfo,
2611 .get_link = ethtool_op_get_link,
2612};
2613
553675fb 2614static void vxlan_del_work(struct work_struct *work)
2615{
2616 struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
acbf74a7 2617 udp_tunnel_sock_release(vs->sock);
553675fb 2618 kfree_rcu(vs, rcu);
2619}
2620
3ee64f39
TH		 2621static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2622 __be16 port, u32 flags)
553675fb 2623{
e4c7ed41 2624 struct socket *sock;
3ee64f39
TH		 2625 struct udp_port_cfg udp_conf;
2626 int err;
e4c7ed41 2627
3ee64f39 2628 memset(&udp_conf, 0, sizeof(udp_conf));
e4c7ed41 2629
3ee64f39
TH		 2630 if (ipv6) {
2631 udp_conf.family = AF_INET6;
3ee64f39 2632 udp_conf.use_udp6_rx_checksums =
3dc2b6a8 2633 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
a43a9ef6 2634 udp_conf.ipv6_v6only = 1;
3ee64f39
TH		 2635 } else {
2636 udp_conf.family = AF_INET;
e4c7ed41 2637 }
e4c7ed41 2638
3ee64f39 2639 udp_conf.local_udp_port = port;
553675fb 2640
3ee64f39
TH		 2641 /* Open UDP socket */
2642 err = udp_sock_create(net, &udp_conf, &sock);
2643 if (err < 0)
2644 return ERR_PTR(err);
e4c7ed41 2645
39deb2c7 2646 return sock;
e4c7ed41
CW		 2647}
2648
2649/* Create new listen socket if needed */
b1be00a6
JB		 2650static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
2651 __be16 port, u32 flags)
e4c7ed41
CW		 2652{
2653 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2654 struct vxlan_sock *vs;
2655 struct socket *sock;
e4c7ed41 2656 unsigned int h;
acbf74a7 2657 struct udp_tunnel_sock_cfg tunnel_cfg;
e4c7ed41 2658
dc01e7d3 2659 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
e4c7ed41
CW		 2660 if (!vs)
2661 return ERR_PTR(-ENOMEM);
2662
2663 for (h = 0; h < VNI_HASH_SIZE; ++h)
2664 INIT_HLIST_HEAD(&vs->vni_list[h]);
2665
2666 INIT_WORK(&vs->del_work, vxlan_del_work);
2667
3ee64f39 2668 sock = vxlan_create_sock(net, ipv6, port, flags);
39deb2c7 2669 if (IS_ERR(sock)) {
56ef9c90
MRL		 2670 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port),
2671 PTR_ERR(sock));
553675fb 2672 kfree(vs);
e50fddc8 2673 return ERR_CAST(sock);
553675fb 2674 }
e4c7ed41
CW		 2675
2676 vs->sock = sock;
9c2e24e1 2677 atomic_set(&vs->refcnt, 1);
af33c1ad 2678 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
553675fb 2679
dc01e7d3
OG		 2680 /* Initialize the vxlan udp offloads structure */
2681 vs->udp_offloads.port = port;
2682 vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive;
2683 vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete;
2684
9c2e24e1
PS		 2685 spin_lock(&vn->sock_lock);
2686 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
dc01e7d3 2687 vxlan_notify_add_rx_port(vs);
9c2e24e1 2688 spin_unlock(&vn->sock_lock);
553675fb 2689
2690 /* Mark socket as an encapsulation socket. */
acbf74a7
AZ		 2691 tunnel_cfg.sk_user_data = vs;
2692 tunnel_cfg.encap_type = 1;
2693 tunnel_cfg.encap_rcv = vxlan_udp_encap_recv;
2694 tunnel_cfg.encap_destroy = NULL;
2695
2696 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
e4c7ed41 2697
9c2e24e1
PS		 2698 return vs;
2699}
2700
b1be00a6 2701static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6)
9c2e24e1 2702{
205f356d
JB		 2703 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2704 struct vxlan_sock *vs = NULL;
9c2e24e1 2705
205f356d 2706 if (!vxlan->cfg.no_share) {
56ef9c90 2707 spin_lock(&vn->sock_lock);
205f356d
JB		 2708 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
2709 vxlan->cfg.dst_port, vxlan->flags);
2710 if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) {
56ef9c90 2711 spin_unlock(&vn->sock_lock);
205f356d 2712 return -EBUSY;
56ef9c90
MRL		 2713 }
2714 spin_unlock(&vn->sock_lock);
2715 }
205f356d 2716 if (!vs)
b1be00a6
JB		 2717 vs = vxlan_socket_create(vxlan->net, ipv6,
2718 vxlan->cfg.dst_port, vxlan->flags);
205f356d
JB		 2719 if (IS_ERR(vs))
2720 return PTR_ERR(vs);
b1be00a6
JB		 2721#if IS_ENABLED(CONFIG_IPV6)
2722 if (ipv6)
2723 vxlan->vn6_sock = vs;
2724 else
2725#endif
2726 vxlan->vn4_sock = vs;
205f356d
JB		 2727 vxlan_vs_add_dev(vs, vxlan);
2728 return 0;
553675fb 2729}
2730
b1be00a6
JB		 2731static int vxlan_sock_add(struct vxlan_dev *vxlan)
2732{
2733 bool ipv6 = vxlan->flags & VXLAN_F_IPV6;
2734 bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA;
2735 int ret = 0;
2736
2737 vxlan->vn4_sock = NULL;
2738#if IS_ENABLED(CONFIG_IPV6)
2739 vxlan->vn6_sock = NULL;
2740 if (ipv6 || metadata)
2741 ret = __vxlan_sock_add(vxlan, true);
2742#endif
2743 if (!ret && (!ipv6 || metadata))
2744 ret = __vxlan_sock_add(vxlan, false);
2745 if (ret < 0)
2746 vxlan_sock_release(vxlan);
2747 return ret;
2748}
2749
0dfbdf41
TG		 2750static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
2751 struct vxlan_config *conf)
d342894c 2752{
33564bbb 2753 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
07b9b37c 2754 struct vxlan_dev *vxlan = netdev_priv(dev), *tmp;
c7995c43 2755 struct vxlan_rdst *dst = &vxlan->default_dst;
b1be00a6 2756 unsigned short needed_headroom = ETH_HLEN;
d342894c 2757 int err;
e4c7ed41 2758 bool use_ipv6 = false;
0dfbdf41 2759 __be16 default_port = vxlan->cfg.dst_port;
d342894c 2760
33564bbb 2761 vxlan->net = src_net;
f01ec1c0 2762
0dfbdf41 2763 dst->remote_vni = conf->vni;
d342894c 2764
0dfbdf41 2765 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
d342894c 2766
0dfbdf41
TG		 2767 /* Unless IPv6 is explicitly requested, assume IPv4 */
2768 if (!dst->remote_ip.sa.sa_family)
2769 dst->remote_ip.sa.sa_family = AF_INET;
e4c7ed41 2770
0dfbdf41 2771 if (dst->remote_ip.sa.sa_family == AF_INET6 ||
057ba29b
JB		 2772 vxlan->cfg.saddr.sa.sa_family == AF_INET6) {
2773 if (!IS_ENABLED(CONFIG_IPV6))
2774 return -EPFNOSUPPORT;
e4c7ed41 2775 use_ipv6 = true;
b1be00a6 2776 vxlan->flags |= VXLAN_F_IPV6;
057ba29b 2777 }
d342894c 2778
0dfbdf41 2779 if (conf->remote_ifindex) {
34e02aa1 2780 struct net_device *lowerdev
0dfbdf41
TG		 2781 = __dev_get_by_index(src_net, conf->remote_ifindex);
2782
2783 dst->remote_ifindex = conf->remote_ifindex;
34e02aa1 2784
2785 if (!lowerdev) {
c7995c43 2786 pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
34e02aa1 2787 return -ENODEV;
2788 }
d342894c 2789
e4c7ed41
CW		 2790#if IS_ENABLED(CONFIG_IPV6)
2791 if (use_ipv6) {
2792 struct inet6_dev *idev = __in6_dev_get(lowerdev);
2793 if (idev && idev->cnf.disable_ipv6) {
2794 pr_info("IPv6 is disabled via sysctl\n");
2795 return -EPERM;
2796 }
e4c7ed41
CW		 2797 }
2798#endif
2799
0dfbdf41 2800 if (!conf->mtu)
e4c7ed41 2801 dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
1ba56fb4 2802
b1be00a6 2803 needed_headroom = lowerdev->hard_header_len;
9dc2ad10 2804 }
d342894c 2805
b1be00a6
JB		 2806 if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
2807 needed_headroom += VXLAN6_HEADROOM;
2808 else
2809 needed_headroom += VXLAN_HEADROOM;
2810 dev->needed_headroom = needed_headroom;
2811
0dfbdf41
TG		 2812 memcpy(&vxlan->cfg, conf, sizeof(*conf));
2813 if (!vxlan->cfg.dst_port)
2814 vxlan->cfg.dst_port = default_port;
2815 vxlan->flags |= conf->flags;
2816
2817 if (!vxlan->cfg.age_interval)
2818 vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
2819
07b9b37c
ND		 2820 list_for_each_entry(tmp, &vn->vxlan_list, next) {
2821 if (tmp->cfg.vni == conf->vni &&
2822 (tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 ||
2823 tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 &&
2824 tmp->cfg.dst_port == vxlan->cfg.dst_port &&
2825 (tmp->flags & VXLAN_F_RCV_FLAGS) ==
2826 (vxlan->flags & VXLAN_F_RCV_FLAGS))
0dfbdf41 2827 return -EEXIST;
07b9b37c 2828 }
0dfbdf41
TG		 2829
2830 dev->ethtool_ops = &vxlan_ethtool_ops;
2831
2832 /* create an fdb entry for a valid default destination */
2833 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
2834 err = vxlan_fdb_create(vxlan, all_zeros_mac,
2835 &vxlan->default_dst.remote_ip,
2836 NUD_REACHABLE|NUD_PERMANENT,
2837 NLM_F_EXCL|NLM_F_CREATE,
2838 vxlan->cfg.dst_port,
2839 vxlan->default_dst.remote_vni,
2840 vxlan->default_dst.remote_ifindex,
2841 NTF_SELF);
2842 if (err)
2843 return err;
2844 }
2845
2846 err = register_netdevice(dev);
2847 if (err) {
2848 vxlan_fdb_delete_default(vxlan);
2849 return err;
2850 }
2851
2852 list_add(&vxlan->next, &vn->vxlan_list);
2853
2854 return 0;
2855}
2856
2857struct net_device *vxlan_dev_create(struct net *net, const char *name,
2858 u8 name_assign_type, struct vxlan_config *conf)
2859{
2860 struct nlattr *tb[IFLA_MAX+1];
2861 struct net_device *dev;
2862 int err;
2863
2864 memset(&tb, 0, sizeof(tb));
2865
2866 dev = rtnl_create_link(net, name, name_assign_type,
2867 &vxlan_link_ops, tb);
2868 if (IS_ERR(dev))
2869 return dev;
2870
2871 err = vxlan_dev_configure(net, dev, conf);
2872 if (err < 0) {
2873 free_netdev(dev);
2874 return ERR_PTR(err);
2875 }
2876
2877 return dev;
2878}
2879EXPORT_SYMBOL_GPL(vxlan_dev_create);
2880
2881static int vxlan_newlink(struct net *src_net, struct net_device *dev,
2882 struct nlattr *tb[], struct nlattr *data[])
2883{
2884 struct vxlan_config conf;
2885 int err;
2886
0dfbdf41 2887 memset(&conf, 0, sizeof(conf));
e277de5f
JG		 2888
2889 if (data[IFLA_VXLAN_ID])
2890 conf.vni = nla_get_u32(data[IFLA_VXLAN_ID]);
0dfbdf41
TG		 2891
2892 if (data[IFLA_VXLAN_GROUP]) {
2893 conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
2894 } else if (data[IFLA_VXLAN_GROUP6]) {
2895 if (!IS_ENABLED(CONFIG_IPV6))
2896 return -EPFNOSUPPORT;
2897
2898 conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
2899 conf.remote_ip.sa.sa_family = AF_INET6;
2900 }
2901
2902 if (data[IFLA_VXLAN_LOCAL]) {
2903 conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
2904 conf.saddr.sa.sa_family = AF_INET;
2905 } else if (data[IFLA_VXLAN_LOCAL6]) {
2906 if (!IS_ENABLED(CONFIG_IPV6))
2907 return -EPFNOSUPPORT;
2908
2909 /* TODO: respect scope id */
2910 conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
2911 conf.saddr.sa.sa_family = AF_INET6;
2912 }
2913
2914 if (data[IFLA_VXLAN_LINK])
2915 conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
2916
d342894c 2917 if (data[IFLA_VXLAN_TOS])
0dfbdf41 2918 conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
d342894c 2919
afb97186 2920 if (data[IFLA_VXLAN_TTL])
0dfbdf41 2921 conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
afb97186 2922
d342894c 2923 if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
0dfbdf41 2924 conf.flags |= VXLAN_F_LEARN;
d342894c 2925
2926 if (data[IFLA_VXLAN_AGEING])
0dfbdf41 2927 conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
d342894c 2928
e4f67add 2929 if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
0dfbdf41 2930 conf.flags |= VXLAN_F_PROXY;
e4f67add
DS		 2931
2932 if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
0dfbdf41 2933 conf.flags |= VXLAN_F_RSC;
e4f67add
DS		 2934
2935 if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
0dfbdf41 2936 conf.flags |= VXLAN_F_L2MISS;
e4f67add
DS		 2937
2938 if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
0dfbdf41 2939 conf.flags |= VXLAN_F_L3MISS;
e4f67add 2940
d342894c 2941 if (data[IFLA_VXLAN_LIMIT])
0dfbdf41 2942 conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
d342894c 2943
f8a9b1bc
AS		 2944 if (data[IFLA_VXLAN_COLLECT_METADATA] &&
2945 nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
2946 conf.flags |= VXLAN_F_COLLECT_METADATA;
2947
05f47d69 2948 if (data[IFLA_VXLAN_PORT_RANGE]) {
2949 const struct ifla_vxlan_port_range *p
2950 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
0dfbdf41
TG		 2951 conf.port_min = ntohs(p->low);
2952 conf.port_max = ntohs(p->high);
05f47d69 2953 }
2954
823aa873 2955 if (data[IFLA_VXLAN_PORT])
0dfbdf41 2956 conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
823aa873 2957
359a0ea9 2958 if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
0dfbdf41 2959 conf.flags |= VXLAN_F_UDP_CSUM;
359a0ea9
TH		 2960
2961 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
2962 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
0dfbdf41 2963 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
359a0ea9
TH		 2964
2965 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
2966 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
0dfbdf41 2967 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
359a0ea9 2968
dfd8645e
TH		 2969 if (data[IFLA_VXLAN_REMCSUM_TX] &&
2970 nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
0dfbdf41 2971 conf.flags |= VXLAN_F_REMCSUM_TX;
dfd8645e
TH		 2972
2973 if (data[IFLA_VXLAN_REMCSUM_RX] &&
2974 nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
0dfbdf41 2975 conf.flags |= VXLAN_F_REMCSUM_RX;
dfd8645e 2976
3511494c 2977 if (data[IFLA_VXLAN_GBP])
0dfbdf41 2978 conf.flags |= VXLAN_F_GBP;
3511494c 2979
0ace2ca8 2980 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
0dfbdf41 2981 conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
0ace2ca8 2982
0dfbdf41
TG		 2983 err = vxlan_dev_configure(src_net, dev, &conf);
2984 switch (err) {
2985 case -ENODEV:
2986 pr_info("ifindex %d does not exist\n", conf.remote_ifindex);
2987 break;
1b13c97f 2988
0dfbdf41
TG		 2989 case -EPERM:
2990 pr_info("IPv6 is disabled via sysctl\n");
2991 break;
d342894c 2992
0dfbdf41
TG		 2993 case -EEXIST:
2994 pr_info("duplicate VNI %u\n", conf.vni);
2995 break;
afbd8bae
MR		 2996 }
2997
0dfbdf41 2998 return err;
d342894c 2999}
3000
3001static void vxlan_dellink(struct net_device *dev, struct list_head *head)
3002{
3003 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 3004 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
d342894c 3005
fe5c3561 3006 spin_lock(&vn->sock_lock);
9c2e24e1
PS		 3007 if (!hlist_unhashed(&vxlan->hlist))
3008 hlist_del_rcu(&vxlan->hlist);
fe5c3561 3009 spin_unlock(&vn->sock_lock);
3010
58ce31cc 3011 gro_cells_destroy(&vxlan->gro_cells);
553675fb 3012 list_del(&vxlan->next);
d342894c 3013 unregister_netdevice_queue(dev, head);
3014}
3015
3016static size_t vxlan_get_size(const struct net_device *dev)
3017{
3018
3019 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
e4c7ed41 3020 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
d342894c 3021 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
e4c7ed41 3022 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
d342894c 3023 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
3024 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
3025 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
e4f67add
DS		 3026 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
3027 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
3028 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
3029 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
da8b43c0 3030 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
d342894c 3031 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
3032 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
05f47d69 3033 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
359a0ea9
TH		 3034 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
3035 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
3036 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3037 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
dfd8645e
TH		 3038 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
3039 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
d342894c 3040 0;
3041}
3042
3043static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
3044{
3045 const struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 3046 const struct vxlan_rdst *dst = &vxlan->default_dst;
05f47d69 3047 struct ifla_vxlan_port_range ports = {
0dfbdf41
TG		 3048 .low = htons(vxlan->cfg.port_min),
3049 .high = htons(vxlan->cfg.port_max),
05f47d69 3050 };
d342894c 3051
c7995c43 3052 if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni))
d342894c 3053 goto nla_put_failure;
3054
e4c7ed41
CW		 3055 if (!vxlan_addr_any(&dst->remote_ip)) {
3056 if (dst->remote_ip.sa.sa_family == AF_INET) {
930345ea
JB		 3057 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
3058 dst->remote_ip.sin.sin_addr.s_addr))
e4c7ed41
CW		 3059 goto nla_put_failure;
3060#if IS_ENABLED(CONFIG_IPV6)
3061 } else {
930345ea
JB		 3062 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
3063 &dst->remote_ip.sin6.sin6_addr))
e4c7ed41
CW		 3064 goto nla_put_failure;
3065#endif
3066 }
3067 }
d342894c 3068
c7995c43 3069 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
d342894c 3070 goto nla_put_failure;
3071
0dfbdf41
TG		 3072 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
3073 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
930345ea 3074 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
0dfbdf41 3075 vxlan->cfg.saddr.sin.sin_addr.s_addr))
e4c7ed41
CW		 3076 goto nla_put_failure;
3077#if IS_ENABLED(CONFIG_IPV6)
3078 } else {
930345ea 3079 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
0dfbdf41 3080 &vxlan->cfg.saddr.sin6.sin6_addr))
e4c7ed41
CW		 3081 goto nla_put_failure;
3082#endif
3083 }
3084 }
d342894c 3085
0dfbdf41
TG		 3086 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
3087 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
e4f67add
DS		 3088 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
3089 !!(vxlan->flags & VXLAN_F_LEARN)) ||
3090 nla_put_u8(skb, IFLA_VXLAN_PROXY,
3091 !!(vxlan->flags & VXLAN_F_PROXY)) ||
3092 nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) ||
3093 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
3094 !!(vxlan->flags & VXLAN_F_L2MISS)) ||
3095 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
3096 !!(vxlan->flags & VXLAN_F_L3MISS)) ||
da8b43c0
AS		 3097 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
3098 !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) ||
0dfbdf41
TG		 3099 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
3100 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
3101 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
359a0ea9
TH		 3102 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
3103 !!(vxlan->flags & VXLAN_F_UDP_CSUM)) ||
3104 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
3105 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
3106 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
dfd8645e
TH		 3107 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
3108 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
3109 !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) ||
3110 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
3111 !!(vxlan->flags & VXLAN_F_REMCSUM_RX)))
d342894c 3112 goto nla_put_failure;
3113
05f47d69 3114 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
3115 goto nla_put_failure;
3116
3511494c
TG		 3117 if (vxlan->flags & VXLAN_F_GBP &&
3118 nla_put_flag(skb, IFLA_VXLAN_GBP))
3119 goto nla_put_failure;
3120
0ace2ca8
TH		 3121 if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL &&
3122 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3123 goto nla_put_failure;
3124
d342894c 3125 return 0;
3126
3127nla_put_failure:
3128 return -EMSGSIZE;
3129}
3130
1728d4fa
ND		 3131static struct net *vxlan_get_link_net(const struct net_device *dev)
3132{
3133 struct vxlan_dev *vxlan = netdev_priv(dev);
3134
3135 return vxlan->net;
3136}
3137
d342894c 3138static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3139 .kind = "vxlan",
3140 .maxtype = IFLA_VXLAN_MAX,
3141 .policy = vxlan_policy,
3142 .priv_size = sizeof(struct vxlan_dev),
3143 .setup = vxlan_setup,
3144 .validate = vxlan_validate,
3145 .newlink = vxlan_newlink,
3146 .dellink = vxlan_dellink,
3147 .get_size = vxlan_get_size,
3148 .fill_info = vxlan_fill_info,
1728d4fa 3149 .get_link_net = vxlan_get_link_net,
d342894c 3150};
3151
acaf4e70
DB		 3152static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3153 struct net_device *dev)
3154{
3155 struct vxlan_dev *vxlan, *next;
3156 LIST_HEAD(list_kill);
3157
3158 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3159 struct vxlan_rdst *dst = &vxlan->default_dst;
3160
3161 /* In case we created vxlan device with carrier
3162 * and we loose the carrier due to module unload
3163 * we also need to remove vxlan device. In other
3164 * cases, it's not necessary and remote_ifindex
3165 * is 0 here, so no matches.
3166 */
3167 if (dst->remote_ifindex == dev->ifindex)
3168 vxlan_dellink(vxlan->dev, &list_kill);
3169 }
3170
3171 unregister_netdevice_many(&list_kill);
3172}
3173
3174static int vxlan_lowerdev_event(struct notifier_block *unused,
3175 unsigned long event, void *ptr)
3176{
3177 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
783c1463 3178 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
acaf4e70 3179
783c1463 3180 if (event == NETDEV_UNREGISTER)
acaf4e70
DB		 3181 vxlan_handle_lowerdev_unregister(vn, dev);
3182
3183 return NOTIFY_DONE;
3184}
3185
3186static struct notifier_block vxlan_notifier_block __read_mostly = {
3187 .notifier_call = vxlan_lowerdev_event,
3188};
3189
d342894c 3190static __net_init int vxlan_init_net(struct net *net)
3191{
3192 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
31fec5aa 3193 unsigned int h;
d342894c 3194
553675fb 3195 INIT_LIST_HEAD(&vn->vxlan_list);
1c51a915 3196 spin_lock_init(&vn->sock_lock);
d342894c 3197
553675fb 3198 for (h = 0; h < PORT_HASH_SIZE; ++h)
3199 INIT_HLIST_HEAD(&vn->sock_list[h]);
d342894c 3200
3201 return 0;
3202}
3203
f01ec1c0
ND		 3204static void __net_exit vxlan_exit_net(struct net *net)
3205{
3206 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3207 struct vxlan_dev *vxlan, *next;
3208 struct net_device *dev, *aux;
3209 LIST_HEAD(list);
3210
3211 rtnl_lock();
3212 for_each_netdev_safe(net, dev, aux)
3213 if (dev->rtnl_link_ops == &vxlan_link_ops)
3214 unregister_netdevice_queue(dev, &list);
3215
3216 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3217 /* If vxlan->dev is in the same netns, it has already been added
3218 * to the list by the previous loop.
3219 */
58ce31cc
TH		 3220 if (!net_eq(dev_net(vxlan->dev), net)) {
3221 gro_cells_destroy(&vxlan->gro_cells);
13c3ed6a 3222 unregister_netdevice_queue(vxlan->dev, &list);
58ce31cc 3223 }
f01ec1c0
ND		 3224 }
3225
3226 unregister_netdevice_many(&list);
3227 rtnl_unlock();
3228}
3229
d342894c 3230static struct pernet_operations vxlan_net_ops = {
3231 .init = vxlan_init_net,
f01ec1c0 3232 .exit = vxlan_exit_net,
d342894c 3233 .id = &vxlan_net_id,
3234 .size = sizeof(struct vxlan_net),
3235};
3236
3237static int __init vxlan_init_module(void)
3238{
3239 int rc;
3240
758c57d1
SH		 3241 vxlan_wq = alloc_workqueue("vxlan", 0, 0);
3242 if (!vxlan_wq)
3243 return -ENOMEM;
3244
d342894c 3245 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3246
783c1463 3247 rc = register_pernet_subsys(&vxlan_net_ops);
d342894c 3248 if (rc)
3249 goto out1;
3250
acaf4e70 3251 rc = register_netdevice_notifier(&vxlan_notifier_block);
d342894c 3252 if (rc)
3253 goto out2;
3254
acaf4e70
DB		 3255 rc = rtnl_link_register(&vxlan_link_ops);
3256 if (rc)
3257 goto out3;
d342894c 3258
acaf4e70
DB		 3259 return 0;
3260out3:
3261 unregister_netdevice_notifier(&vxlan_notifier_block);
d342894c 3262out2:
783c1463 3263 unregister_pernet_subsys(&vxlan_net_ops);
d342894c 3264out1:
758c57d1 3265 destroy_workqueue(vxlan_wq);
d342894c 3266 return rc;
3267}
7332a13b 3268late_initcall(vxlan_init_module);
d342894c 3269
3270static void __exit vxlan_cleanup_module(void)
3271{
b7153984 3272 rtnl_link_unregister(&vxlan_link_ops);
acaf4e70 3273 unregister_netdevice_notifier(&vxlan_notifier_block);
758c57d1 3274 destroy_workqueue(vxlan_wq);
783c1463
DB		 3275 unregister_pernet_subsys(&vxlan_net_ops);
3276 /* rcu_barrier() is called by netns */
d342894c 3277}
3278module_exit(vxlan_cleanup_module);
3279
3280MODULE_LICENSE("GPL");
3281MODULE_VERSION(VXLAN_VERSION);
3b8df3c6 3282MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
ead5139a 3283MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
d342894c 3284MODULE_ALIAS_RTNL_LINK("vxlan");
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