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cpu/hotplug: Cleanup state names
[linux-2.6-block.git] / drivers / net / vxlan.c
CommitLineData
d342894c 1/*
eb5ce439 2 * VXLAN: Virtual eXtensible Local Area Network
d342894c 3 *
3b8df3c6 4 * Copyright (c) 2012-2013 Vyatta Inc.
d342894c 5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
d342894c 9 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <linux/kernel.h>
d342894c 14#include <linux/module.h>
15#include <linux/errno.h>
16#include <linux/slab.h>
d342894c 17#include <linux/udp.h>
18#include <linux/igmp.h>
d342894c 19#include <linux/if_ether.h>
1b13c97f 20#include <linux/ethtool.h>
e4f67add
DS		 21#include <net/arp.h>
22#include <net/ndisc.h>
d342894c 23#include <net/ip.h>
24#include <net/icmp.h>
d342894c 25#include <net/rtnetlink.h>
d342894c 26#include <net/inet_ecn.h>
27#include <net/net_namespace.h>
28#include <net/netns/generic.h>
012a5729 29#include <net/vxlan.h>
40d29af0 30
e4c7ed41 31#if IS_ENABLED(CONFIG_IPV6)
e4c7ed41 32#include <net/ip6_tunnel.h>
660d98ca 33#include <net/ip6_checksum.h>
e4c7ed41 34#endif
d342894c 35
36#define VXLAN_VERSION "0.1"
37
553675fb 38#define PORT_HASH_BITS 8
39#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
d342894c 40#define FDB_AGE_DEFAULT 300 /* 5 min */
41#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
42
23c578bf 43/* UDP port for VXLAN traffic.
44 * The IANA assigned port is 4789, but the Linux default is 8472
234f5b73 45 * for compatibility with early adopters.
23c578bf 46 */
9daaa397
SH		 47static unsigned short vxlan_port __read_mostly = 8472;
48module_param_named(udp_port, vxlan_port, ushort, 0444);
d342894c 49MODULE_PARM_DESC(udp_port, "Destination UDP port");
50
51static bool log_ecn_error = true;
52module_param(log_ecn_error, bool, 0644);
53MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
54
c7d03a00 55static unsigned int vxlan_net_id;
0dfbdf41 56static struct rtnl_link_ops vxlan_link_ops;
553675fb 57
7256eac1 58static const u8 all_zeros_mac[ETH_ALEN + 2];
afbd8bae 59
205f356d 60static int vxlan_sock_add(struct vxlan_dev *vxlan);
614732ea 61
553675fb 62/* per-network namespace private data for this module */
63struct vxlan_net {
64 struct list_head vxlan_list;
65 struct hlist_head sock_list[PORT_HASH_SIZE];
1c51a915 66 spinlock_t sock_lock;
553675fb 67};
68
d342894c 69/* Forwarding table entry */
70struct vxlan_fdb {
71 struct hlist_node hlist; /* linked list of entries */
72 struct rcu_head rcu;
73 unsigned long updated; /* jiffies */
74 unsigned long used;
3e61aa8f 75 struct list_head remotes;
7177a3b0 76 u8 eth_addr[ETH_ALEN];
d342894c 77 u16 state; /* see ndm_state */
ae884082 78 u8 flags; /* see ndm_flags */
d342894c 79};
80
d342894c 81/* salt for hash table */
82static u32 vxlan_salt __read_mostly;
83
ee122c79
TG		 84static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
85{
e7030878
TG		 86 return vs->flags & VXLAN_F_COLLECT_METADATA ||
87 ip_tunnel_collect_metadata();
ee122c79
TG		 88}
89
e4c7ed41
CW		 90#if IS_ENABLED(CONFIG_IPV6)
91static inline
92bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
93{
f0ef3126
JB		 94 if (a->sa.sa_family != b->sa.sa_family)
95 return false;
96 if (a->sa.sa_family == AF_INET6)
97 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
98 else
99 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 100}
101
102static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
103{
f0ef3126
JB		 104 if (ipa->sa.sa_family == AF_INET6)
105 return ipv6_addr_any(&ipa->sin6.sin6_addr);
106 else
107 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 108}
109
110static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
111{
f0ef3126
JB		 112 if (ipa->sa.sa_family == AF_INET6)
113 return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
114 else
115 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 116}
117
118static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
119{
f0ef3126 120 if (nla_len(nla) >= sizeof(struct in6_addr)) {
67b61f6c 121 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
f0ef3126
JB		 122 ip->sa.sa_family = AF_INET6;
123 return 0;
124 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 125 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 126 ip->sa.sa_family = AF_INET;
127 return 0;
128 } else {
129 return -EAFNOSUPPORT;
130 }
e4c7ed41
CW		 131}
132
133static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 134 const union vxlan_addr *ip)
e4c7ed41 135{
f0ef3126 136 if (ip->sa.sa_family == AF_INET6)
930345ea 137 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
f0ef3126 138 else
930345ea 139 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 140}
141
142#else /* !CONFIG_IPV6 */
143
144static inline
145bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
146{
f0ef3126 147 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 148}
149
150static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
151{
f0ef3126 152 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
e4c7ed41
CW		 153}
154
155static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
156{
f0ef3126 157 return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
e4c7ed41
CW		 158}
159
160static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
161{
f0ef3126
JB		 162 if (nla_len(nla) >= sizeof(struct in6_addr)) {
163 return -EAFNOSUPPORT;
164 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 165 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 166 ip->sa.sa_family = AF_INET;
167 return 0;
168 } else {
169 return -EAFNOSUPPORT;
170 }
e4c7ed41
CW		 171}
172
173static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 174 const union vxlan_addr *ip)
e4c7ed41 175{
930345ea 176 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 177}
178#endif
179
553675fb 180/* Virtual Network hash table head */
54bfd872 181static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni)
553675fb 182{
54bfd872 183 return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)];
553675fb 184}
185
186/* Socket hash table head */
187static inline struct hlist_head *vs_head(struct net *net, __be16 port)
d342894c 188{
189 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
190
553675fb 191 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
192}
193
3e61aa8f
SH		 194/* First remote destination for a forwarding entry.
195 * Guaranteed to be non-NULL because remotes are never deleted.
196 */
5ca5461c 197static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
3e61aa8f 198{
5ca5461c 199 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
200}
201
202static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
203{
204 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
3e61aa8f
SH		 205}
206
ac5132d1
TG		 207/* Find VXLAN socket based on network namespace, address family and UDP port
208 * and enabled unshareable flags.
209 */
210static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
211 __be16 port, u32 flags)
553675fb 212{
213 struct vxlan_sock *vs;
af33c1ad
TH		 214
215 flags &= VXLAN_F_RCV_FLAGS;
553675fb 216
217 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
19ca9fc1 218 if (inet_sk(vs->sock->sk)->inet_sport == port &&
705cc62f 219 vxlan_get_sk_family(vs) == family &&
af33c1ad 220 vs->flags == flags)
553675fb 221 return vs;
222 }
223 return NULL;
d342894c 224}
225
54bfd872 226static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, __be32 vni)
d342894c 227{
228 struct vxlan_dev *vxlan;
d342894c 229
b9167b2e
JB		 230 /* For flow based devices, map all packets to VNI 0 */
231 if (vs->flags & VXLAN_F_COLLECT_METADATA)
232 vni = 0;
233
54bfd872
JB		 234 hlist_for_each_entry_rcu(vxlan, vni_head(vs, vni), hlist) {
235 if (vxlan->default_dst.remote_vni == vni)
d342894c 236 return vxlan;
237 }
238
239 return NULL;
240}
241
5cfccc5a 242/* Look up VNI in a per net namespace table */
54bfd872 243static struct vxlan_dev *vxlan_find_vni(struct net *net, __be32 vni,
ac5132d1
TG		 244 sa_family_t family, __be16 port,
245 u32 flags)
5cfccc5a
PS		 246{
247 struct vxlan_sock *vs;
248
ac5132d1 249 vs = vxlan_find_sock(net, family, port, flags);
5cfccc5a
PS		 250 if (!vs)
251 return NULL;
252
54bfd872 253 return vxlan_vs_find_vni(vs, vni);
5cfccc5a
PS		 254}
255
d342894c 256/* Fill in neighbour message in skbuff. */
257static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
234f5b73
SH		 258 const struct vxlan_fdb *fdb,
259 u32 portid, u32 seq, int type, unsigned int flags,
260 const struct vxlan_rdst *rdst)
d342894c 261{
262 unsigned long now = jiffies;
263 struct nda_cacheinfo ci;
264 struct nlmsghdr *nlh;
265 struct ndmsg *ndm;
e4f67add 266 bool send_ip, send_eth;
d342894c 267
268 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
269 if (nlh == NULL)
270 return -EMSGSIZE;
271
272 ndm = nlmsg_data(nlh);
273 memset(ndm, 0, sizeof(*ndm));
e4f67add
DS		 274
275 send_eth = send_ip = true;
276
277 if (type == RTM_GETNEIGH) {
278 ndm->ndm_family = AF_INET;
e4c7ed41 279 send_ip = !vxlan_addr_any(&rdst->remote_ip);
e4f67add
DS		 280 send_eth = !is_zero_ether_addr(fdb->eth_addr);
281 } else
282 ndm->ndm_family = AF_BRIDGE;
d342894c 283 ndm->ndm_state = fdb->state;
284 ndm->ndm_ifindex = vxlan->dev->ifindex;
ae884082 285 ndm->ndm_flags = fdb->flags;
545469f7 286 ndm->ndm_type = RTN_UNICAST;
d342894c 287
193523bf 288 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
4967082b 289 nla_put_s32(skb, NDA_LINK_NETNSID,
38f507f1 290 peernet2id(dev_net(vxlan->dev), vxlan->net)))
193523bf
ND		 291 goto nla_put_failure;
292
e4f67add 293 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
d342894c 294 goto nla_put_failure;
295
e4c7ed41 296 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
6681712d
DS		 297 goto nla_put_failure;
298
0dfbdf41 299 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
6681712d
DS		 300 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
301 goto nla_put_failure;
c7995c43 302 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
54bfd872 303 nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni)))
6681712d
DS		 304 goto nla_put_failure;
305 if (rdst->remote_ifindex &&
306 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
d342894c 307 goto nla_put_failure;
308
309 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
310 ci.ndm_confirmed = 0;
311 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
312 ci.ndm_refcnt = 0;
313
314 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
315 goto nla_put_failure;
316
053c095a
JB		 317 nlmsg_end(skb, nlh);
318 return 0;
d342894c 319
320nla_put_failure:
321 nlmsg_cancel(skb, nlh);
322 return -EMSGSIZE;
323}
324
325static inline size_t vxlan_nlmsg_size(void)
326{
327 return NLMSG_ALIGN(sizeof(struct ndmsg))
328 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
e4c7ed41 329 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
73cf3317 330 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
6681712d
DS		 331 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
332 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
4967082b 333 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
d342894c 334 + nla_total_size(sizeof(struct nda_cacheinfo));
335}
336
9e4b93f9
ND		 337static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
338 struct vxlan_rdst *rd, int type)
d342894c 339{
340 struct net *net = dev_net(vxlan->dev);
341 struct sk_buff *skb;
342 int err = -ENOBUFS;
343
344 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
345 if (skb == NULL)
346 goto errout;
347
9e4b93f9 348 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
d342894c 349 if (err < 0) {
350 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
351 WARN_ON(err == -EMSGSIZE);
352 kfree_skb(skb);
353 goto errout;
354 }
355
356 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
357 return;
358errout:
359 if (err < 0)
360 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
361}
362
e4c7ed41 363static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
e4f67add
DS		 364{
365 struct vxlan_dev *vxlan = netdev_priv(dev);
bb3fd687
SH		 366 struct vxlan_fdb f = {
367 .state = NUD_STALE,
368 };
369 struct vxlan_rdst remote = {
e4c7ed41 370 .remote_ip = *ipa, /* goes to NDA_DST */
54bfd872 371 .remote_vni = cpu_to_be32(VXLAN_N_VID),
bb3fd687 372 };
3e61aa8f 373
9e4b93f9 374 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 375}
376
377static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
378{
bb3fd687
SH		 379 struct vxlan_fdb f = {
380 .state = NUD_STALE,
381 };
9e4b93f9 382 struct vxlan_rdst remote = { };
e4f67add 383
e4f67add
DS		 384 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
385
9e4b93f9 386 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH);
e4f67add
DS		 387}
388
d342894c 389/* Hash Ethernet address */
390static u32 eth_hash(const unsigned char *addr)
391{
392 u64 value = get_unaligned((u64 *)addr);
393
394 /* only want 6 bytes */
395#ifdef __BIG_ENDIAN
d342894c 396 value >>= 16;
321fb991 397#else
398 value <<= 16;
d342894c 399#endif
400 return hash_64(value, FDB_HASH_BITS);
401}
402
403/* Hash chain to use given mac address */
404static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
405 const u8 *mac)
406{
407 return &vxlan->fdb_head[eth_hash(mac)];
408}
409
410/* Look up Ethernet address in forwarding table */
014be2c8 411static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
d342894c 412 const u8 *mac)
d342894c 413{
414 struct hlist_head *head = vxlan_fdb_head(vxlan, mac);
415 struct vxlan_fdb *f;
d342894c 416
b67bfe0d 417 hlist_for_each_entry_rcu(f, head, hlist) {
7367d0b5 418 if (ether_addr_equal(mac, f->eth_addr))
d342894c 419 return f;
420 }
421
422 return NULL;
423}
424
014be2c8
SS		 425static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
426 const u8 *mac)
427{
428 struct vxlan_fdb *f;
429
430 f = __vxlan_find_mac(vxlan, mac);
431 if (f)
432 f->used = jiffies;
433
434 return f;
435}
436
a5e7c10a
MR		 437/* caller should hold vxlan->hash_lock */
438static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
e4c7ed41 439 union vxlan_addr *ip, __be16 port,
54bfd872 440 __be32 vni, __u32 ifindex)
6681712d 441{
3e61aa8f 442 struct vxlan_rdst *rd;
6681712d 443
3e61aa8f 444 list_for_each_entry(rd, &f->remotes, list) {
e4c7ed41 445 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
6681712d
DS		 446 rd->remote_port == port &&
447 rd->remote_vni == vni &&
448 rd->remote_ifindex == ifindex)
a5e7c10a 449 return rd;
6681712d 450 }
3e61aa8f 451
a5e7c10a
MR		 452 return NULL;
453}
454
906dc186
TR		 455/* Replace destination of unicast mac */
456static int vxlan_fdb_replace(struct vxlan_fdb *f,
54bfd872
JB		 457 union vxlan_addr *ip, __be16 port, __be32 vni,
458 __u32 ifindex)
906dc186
TR		 459{
460 struct vxlan_rdst *rd;
461
462 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
463 if (rd)
464 return 0;
465
466 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
467 if (!rd)
468 return 0;
0c1d70af
PA		 469
470 dst_cache_reset(&rd->dst_cache);
e4c7ed41 471 rd->remote_ip = *ip;
906dc186
TR		 472 rd->remote_port = port;
473 rd->remote_vni = vni;
474 rd->remote_ifindex = ifindex;
475 return 1;
476}
477
a5e7c10a
MR		 478/* Add/update destinations for multicast */
479static int vxlan_fdb_append(struct vxlan_fdb *f,
54bfd872 480 union vxlan_addr *ip, __be16 port, __be32 vni,
9e4b93f9 481 __u32 ifindex, struct vxlan_rdst **rdp)
a5e7c10a
MR		 482{
483 struct vxlan_rdst *rd;
484
485 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
486 if (rd)
487 return 0;
488
6681712d
DS		 489 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
490 if (rd == NULL)
491 return -ENOBUFS;
0c1d70af
PA		 492
493 if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) {
494 kfree(rd);
495 return -ENOBUFS;
496 }
497
e4c7ed41 498 rd->remote_ip = *ip;
6681712d
DS		 499 rd->remote_port = port;
500 rd->remote_vni = vni;
501 rd->remote_ifindex = ifindex;
3e61aa8f
SH		 502
503 list_add_tail_rcu(&rd->list, &f->remotes);
504
9e4b93f9 505 *rdp = rd;
6681712d
DS		 506 return 1;
507}
508
dfd8645e
TH		 509static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
510 unsigned int off,
511 struct vxlanhdr *vh, size_t hdrlen,
54bfd872
JB		 512 __be32 vni_field,
513 struct gro_remcsum *grc,
0ace2ca8 514 bool nopartial)
dfd8645e 515{
b7fe10e5 516 size_t start, offset;
dfd8645e
TH		 517
518 if (skb->remcsum_offload)
b7fe10e5 519 return vh;
dfd8645e
TH		 520
521 if (!NAPI_GRO_CB(skb)->csum_valid)
522 return NULL;
523
54bfd872
JB		 524 start = vxlan_rco_start(vni_field);
525 offset = start + vxlan_rco_offset(vni_field);
dfd8645e 526
b7fe10e5
TH		 527 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
528 start, offset, grc, nopartial);
dfd8645e
TH		 529
530 skb->remcsum_offload = 1;
531
532 return vh;
533}
534
5602c48c
TH		 535static struct sk_buff **vxlan_gro_receive(struct sock *sk,
536 struct sk_buff **head,
537 struct sk_buff *skb)
dc01e7d3
OG		 538{
539 struct sk_buff *p, **pp = NULL;
540 struct vxlanhdr *vh, *vh2;
9b174d88 541 unsigned int hlen, off_vx;
dc01e7d3 542 int flush = 1;
5602c48c 543 struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk);
54bfd872 544 __be32 flags;
26c4f7da
TH		 545 struct gro_remcsum grc;
546
547 skb_gro_remcsum_init(&grc);
dc01e7d3
OG		 548
549 off_vx = skb_gro_offset(skb);
550 hlen = off_vx + sizeof(*vh);
551 vh = skb_gro_header_fast(skb, off_vx);
552 if (skb_gro_header_hard(skb, hlen)) {
553 vh = skb_gro_header_slow(skb, hlen, off_vx);
554 if (unlikely(!vh))
555 goto out;
556 }
dc01e7d3 557
dfd8645e
TH		 558 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
559
54bfd872 560 flags = vh->vx_flags;
dfd8645e
TH		 561
562 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
563 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
54bfd872 564 vh->vx_vni, &grc,
0ace2ca8
TH		 565 !!(vs->flags &
566 VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 567
568 if (!vh)
569 goto out;
570 }
571
b7fe10e5
TH		 572 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
573
dc01e7d3
OG		 574 for (p = *head; p; p = p->next) {
575 if (!NAPI_GRO_CB(p)->same_flow)
576 continue;
577
578 vh2 = (struct vxlanhdr *)(p->data + off_vx);
3511494c
TG		 579 if (vh->vx_flags != vh2->vx_flags ||
580 vh->vx_vni != vh2->vx_vni) {
dc01e7d3
OG		 581 NAPI_GRO_CB(p)->same_flow = 0;
582 continue;
583 }
dc01e7d3
OG		 584 }
585
fcd91dd4 586 pp = call_gro_receive(eth_gro_receive, head, skb);
c194cf93 587 flush = 0;
dc01e7d3 588
dc01e7d3 589out:
26c4f7da 590 skb_gro_remcsum_cleanup(skb, &grc);
dc01e7d3
OG		 591 NAPI_GRO_CB(skb)->flush |= flush;
592
593 return pp;
594}
595
5602c48c 596static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff)
dc01e7d3 597{
229740c6
JR		 598 /* Sets 'skb->inner_mac_header' since we are always called with
599 * 'skb->encapsulation' set.
600 */
9b174d88 601 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
dc01e7d3
OG		 602}
603
d342894c 604/* Add new entry to forwarding table -- assumes lock held */
605static int vxlan_fdb_create(struct vxlan_dev *vxlan,
e4c7ed41 606 const u8 *mac, union vxlan_addr *ip,
6681712d 607 __u16 state, __u16 flags,
54bfd872 608 __be16 port, __be32 vni, __u32 ifindex,
ae884082 609 __u8 ndm_flags)
d342894c 610{
9e4b93f9 611 struct vxlan_rdst *rd = NULL;
d342894c 612 struct vxlan_fdb *f;
613 int notify = 0;
17b46365 614 int rc;
d342894c 615
014be2c8 616 f = __vxlan_find_mac(vxlan, mac);
d342894c 617 if (f) {
618 if (flags & NLM_F_EXCL) {
619 netdev_dbg(vxlan->dev,
620 "lost race to create %pM\n", mac);
621 return -EEXIST;
622 }
623 if (f->state != state) {
624 f->state = state;
625 f->updated = jiffies;
626 notify = 1;
627 }
ae884082
DS		 628 if (f->flags != ndm_flags) {
629 f->flags = ndm_flags;
630 f->updated = jiffies;
631 notify = 1;
632 }
906dc186
TR		 633 if ((flags & NLM_F_REPLACE)) {
634 /* Only change unicasts */
635 if (!(is_multicast_ether_addr(f->eth_addr) ||
636 is_zero_ether_addr(f->eth_addr))) {
60840429 637 notify |= vxlan_fdb_replace(f, ip, port, vni,
906dc186 638 ifindex);
906dc186
TR		 639 } else
640 return -EOPNOTSUPP;
641 }
6681712d 642 if ((flags & NLM_F_APPEND) &&
58e4c767
MR		 643 (is_multicast_ether_addr(f->eth_addr) ||
644 is_zero_ether_addr(f->eth_addr))) {
17b46365 645 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
6681712d
DS		 646
647 if (rc < 0)
648 return rc;
649 notify |= rc;
650 }
d342894c 651 } else {
652 if (!(flags & NLM_F_CREATE))
653 return -ENOENT;
654
0dfbdf41
TG		 655 if (vxlan->cfg.addrmax &&
656 vxlan->addrcnt >= vxlan->cfg.addrmax)
d342894c 657 return -ENOSPC;
658
906dc186
TR		 659 /* Disallow replace to add a multicast entry */
660 if ((flags & NLM_F_REPLACE) &&
661 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
662 return -EOPNOTSUPP;
663
e4c7ed41 664 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
d342894c 665 f = kmalloc(sizeof(*f), GFP_ATOMIC);
666 if (!f)
667 return -ENOMEM;
668
669 notify = 1;
d342894c 670 f->state = state;
ae884082 671 f->flags = ndm_flags;
d342894c 672 f->updated = f->used = jiffies;
3e61aa8f 673 INIT_LIST_HEAD(&f->remotes);
d342894c 674 memcpy(f->eth_addr, mac, ETH_ALEN);
675
17b46365
HY		 676 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
677 if (rc < 0) {
678 kfree(f);
679 return rc;
680 }
3e61aa8f 681
d342894c 682 ++vxlan->addrcnt;
683 hlist_add_head_rcu(&f->hlist,
684 vxlan_fdb_head(vxlan, mac));
685 }
686
9e4b93f9
ND		 687 if (notify) {
688 if (rd == NULL)
689 rd = first_remote_rtnl(f);
690 vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH);
691 }
d342894c 692
693 return 0;
694}
695
6706c82e 696static void vxlan_fdb_free(struct rcu_head *head)
6681712d
DS		 697{
698 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
3e61aa8f 699 struct vxlan_rdst *rd, *nd;
6681712d 700
0c1d70af
PA		 701 list_for_each_entry_safe(rd, nd, &f->remotes, list) {
702 dst_cache_destroy(&rd->dst_cache);
6681712d 703 kfree(rd);
0c1d70af 704 }
6681712d
DS		 705 kfree(f);
706}
707
d342894c 708static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f)
709{
710 netdev_dbg(vxlan->dev,
711 "delete %pM\n", f->eth_addr);
712
713 --vxlan->addrcnt;
9e4b93f9 714 vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH);
d342894c 715
716 hlist_del_rcu(&f->hlist);
6681712d 717 call_rcu(&f->rcu, vxlan_fdb_free);
d342894c 718}
719
f0b074be 720static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
54bfd872
JB		 721 union vxlan_addr *ip, __be16 *port, __be32 *vni,
722 u32 *ifindex)
d342894c 723{
6681712d 724 struct net *net = dev_net(vxlan->dev);
e4c7ed41 725 int err;
d342894c 726
f0b074be 727 if (tb[NDA_DST]) {
e4c7ed41
CW		 728 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
729 if (err)
730 return err;
f0b074be 731 } else {
e4c7ed41
CW		 732 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
733 if (remote->sa.sa_family == AF_INET) {
734 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
735 ip->sa.sa_family = AF_INET;
736#if IS_ENABLED(CONFIG_IPV6)
737 } else {
738 ip->sin6.sin6_addr = in6addr_any;
739 ip->sa.sa_family = AF_INET6;
740#endif
741 }
f0b074be 742 }
d342894c 743
6681712d 744 if (tb[NDA_PORT]) {
73cf3317 745 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
6681712d 746 return -EINVAL;
f0b074be
MR		 747 *port = nla_get_be16(tb[NDA_PORT]);
748 } else {
0dfbdf41 749 *port = vxlan->cfg.dst_port;
f0b074be 750 }
6681712d
DS		 751
752 if (tb[NDA_VNI]) {
753 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
754 return -EINVAL;
54bfd872 755 *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
f0b074be
MR		 756 } else {
757 *vni = vxlan->default_dst.remote_vni;
758 }
6681712d
DS		 759
760 if (tb[NDA_IFINDEX]) {
5abb0029 761 struct net_device *tdev;
6681712d
DS		 762
763 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
764 return -EINVAL;
f0b074be 765 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
73763949 766 tdev = __dev_get_by_index(net, *ifindex);
5abb0029 767 if (!tdev)
6681712d 768 return -EADDRNOTAVAIL;
f0b074be
MR		 769 } else {
770 *ifindex = 0;
771 }
772
773 return 0;
774}
775
776/* Add static entry (via netlink) */
777static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
778 struct net_device *dev,
f6f6424b 779 const unsigned char *addr, u16 vid, u16 flags)
f0b074be
MR		 780{
781 struct vxlan_dev *vxlan = netdev_priv(dev);
782 /* struct net *net = dev_net(vxlan->dev); */
e4c7ed41 783 union vxlan_addr ip;
f0b074be 784 __be16 port;
54bfd872
JB		 785 __be32 vni;
786 u32 ifindex;
f0b074be
MR		 787 int err;
788
789 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
790 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
791 ndm->ndm_state);
792 return -EINVAL;
793 }
794
795 if (tb[NDA_DST] == NULL)
796 return -EINVAL;
797
798 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
799 if (err)
800 return err;
6681712d 801
5933a7bb
MR		 802 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
803 return -EAFNOSUPPORT;
804
d342894c 805 spin_lock_bh(&vxlan->hash_lock);
e4c7ed41 806 err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags,
73cf3317 807 port, vni, ifindex, ndm->ndm_flags);
d342894c 808 spin_unlock_bh(&vxlan->hash_lock);
809
810 return err;
811}
812
813/* Delete entry (via netlink) */
1690be63
VY		 814static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
815 struct net_device *dev,
f6f6424b 816 const unsigned char *addr, u16 vid)
d342894c 817{
818 struct vxlan_dev *vxlan = netdev_priv(dev);
819 struct vxlan_fdb *f;
bc7892ba 820 struct vxlan_rdst *rd = NULL;
e4c7ed41 821 union vxlan_addr ip;
bc7892ba 822 __be16 port;
54bfd872
JB		 823 __be32 vni;
824 u32 ifindex;
bc7892ba
MR		 825 int err;
826
827 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
828 if (err)
829 return err;
830
831 err = -ENOENT;
d342894c 832
833 spin_lock_bh(&vxlan->hash_lock);
834 f = vxlan_find_mac(vxlan, addr);
bc7892ba
MR		 835 if (!f)
836 goto out;
837
e4c7ed41
CW		 838 if (!vxlan_addr_any(&ip)) {
839 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
bc7892ba
MR		 840 if (!rd)
841 goto out;
842 }
843
844 err = 0;
845
846 /* remove a destination if it's not the only one on the list,
847 * otherwise destroy the fdb entry
848 */
849 if (rd && !list_is_singular(&f->remotes)) {
850 list_del_rcu(&rd->list);
9e4b93f9 851 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH);
dcdc7a59 852 kfree_rcu(rd, rcu);
bc7892ba 853 goto out;
d342894c 854 }
bc7892ba
MR		 855
856 vxlan_fdb_destroy(vxlan, f);
857
858out:
d342894c 859 spin_unlock_bh(&vxlan->hash_lock);
860
861 return err;
862}
863
864/* Dump forwarding table */
865static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3 866 struct net_device *dev,
d297653d 867 struct net_device *filter_dev, int *idx)
d342894c 868{
869 struct vxlan_dev *vxlan = netdev_priv(dev);
870 unsigned int h;
d297653d 871 int err = 0;
d342894c 872
873 for (h = 0; h < FDB_HASH_SIZE; ++h) {
874 struct vxlan_fdb *f;
d342894c 875
b67bfe0d 876 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
6681712d 877 struct vxlan_rdst *rd;
6681712d 878
3e61aa8f 879 list_for_each_entry_rcu(rd, &f->remotes, list) {
d297653d 880 if (*idx < cb->args[2])
07a51cd3
AW		 881 goto skip;
882
6681712d
DS		 883 err = vxlan_fdb_info(skb, vxlan, f,
884 NETLINK_CB(cb->skb).portid,
885 cb->nlh->nlmsg_seq,
886 RTM_NEWNEIGH,
887 NLM_F_MULTI, rd);
d297653d 888 if (err < 0)
3e61aa8f 889 goto out;
3e61aa8f 890skip:
d297653d 891 *idx += 1;
07a51cd3 892 }
d342894c 893 }
894 }
3e61aa8f 895out:
d297653d 896 return err;
d342894c 897}
898
899/* Watch incoming packets to learn mapping between Ethernet address
900 * and Tunnel endpoint.
c4b49512 901 * Return true if packet is bogus and should be dropped.
d342894c 902 */
26a41ae6 903static bool vxlan_snoop(struct net_device *dev,
e4c7ed41 904 union vxlan_addr *src_ip, const u8 *src_mac)
d342894c 905{
906 struct vxlan_dev *vxlan = netdev_priv(dev);
907 struct vxlan_fdb *f;
d342894c 908
909 f = vxlan_find_mac(vxlan, src_mac);
910 if (likely(f)) {
5ca5461c 911 struct vxlan_rdst *rdst = first_remote_rcu(f);
3e61aa8f 912
e4c7ed41 913 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip)))
26a41ae6 914 return false;
915
916 /* Don't migrate static entries, drop packets */
eb064c3b 917 if (f->state & NUD_NOARP)
26a41ae6 918 return true;
d342894c 919
920 if (net_ratelimit())
921 netdev_info(dev,
e4c7ed41 922 "%pM migrated from %pIS to %pIS\n",
a4870f79 923 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
d342894c 924
e4c7ed41 925 rdst->remote_ip = *src_ip;
d342894c 926 f->updated = jiffies;
9e4b93f9 927 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH);
d342894c 928 } else {
929 /* learned new entry */
930 spin_lock(&vxlan->hash_lock);
3bf74b1a 931
932 /* close off race between vxlan_flush and incoming packets */
933 if (netif_running(dev))
934 vxlan_fdb_create(vxlan, src_mac, src_ip,
935 NUD_REACHABLE,
936 NLM_F_EXCL|NLM_F_CREATE,
0dfbdf41 937 vxlan->cfg.dst_port,
3bf74b1a 938 vxlan->default_dst.remote_vni,
939 0, NTF_SELF);
d342894c 940 spin_unlock(&vxlan->hash_lock);
941 }
26a41ae6 942
943 return false;
d342894c 944}
945
d342894c 946/* See if multicast group is already in use by other ID */
95ab0991 947static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
d342894c 948{
553675fb 949 struct vxlan_dev *vxlan;
c6fcc4fc 950 struct vxlan_sock *sock4;
4053ab1b
AB		 951#if IS_ENABLED(CONFIG_IPV6)
952 struct vxlan_sock *sock6;
953#endif
b1be00a6 954 unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
d342894c 955
c6fcc4fc 956 sock4 = rtnl_dereference(dev->vn4_sock);
957
95ab0991
G		 958 /* The vxlan_sock is only used by dev, leaving group has
959 * no effect on other vxlan devices.
960 */
c6fcc4fc 961 if (family == AF_INET && sock4 && atomic_read(&sock4->refcnt) == 1)
95ab0991 962 return false;
b1be00a6 963#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 964 sock6 = rtnl_dereference(dev->vn6_sock);
965 if (family == AF_INET6 && sock6 && atomic_read(&sock6->refcnt) == 1)
b1be00a6
JB		 966 return false;
967#endif
95ab0991 968
553675fb 969 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
95ab0991 970 if (!netif_running(vxlan->dev) || vxlan == dev)
553675fb 971 continue;
d342894c 972
c6fcc4fc 973 if (family == AF_INET &&
974 rtnl_dereference(vxlan->vn4_sock) != sock4)
95ab0991 975 continue;
b1be00a6 976#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 977 if (family == AF_INET6 &&
978 rtnl_dereference(vxlan->vn6_sock) != sock6)
b1be00a6
JB		 979 continue;
980#endif
95ab0991
G		 981
982 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
983 &dev->default_dst.remote_ip))
984 continue;
985
986 if (vxlan->default_dst.remote_ifindex !=
987 dev->default_dst.remote_ifindex)
988 continue;
989
990 return true;
553675fb 991 }
d342894c 992
993 return false;
994}
995
544a773a 996static bool __vxlan_sock_release_prep(struct vxlan_sock *vs)
7c47cedf 997{
b1be00a6 998 struct vxlan_net *vn;
012a5729 999
b1be00a6 1000 if (!vs)
544a773a 1001 return false;
7c47cedf 1002 if (!atomic_dec_and_test(&vs->refcnt))
544a773a 1003 return false;
d342894c 1004
b1be00a6 1005 vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id);
1c51a915 1006 spin_lock(&vn->sock_lock);
7c47cedf 1007 hlist_del_rcu(&vs->hlist);
e7b3db5e 1008 udp_tunnel_notify_del_rx_port(vs->sock,
b9adcd69
AD		 1009 (vs->flags & VXLAN_F_GPE) ?
1010 UDP_TUNNEL_TYPE_VXLAN_GPE :
e7b3db5e 1011 UDP_TUNNEL_TYPE_VXLAN);
1c51a915
SH		 1012 spin_unlock(&vn->sock_lock);
1013
544a773a 1014 return true;
d342894c 1015}
1016
b1be00a6
JB		 1017static void vxlan_sock_release(struct vxlan_dev *vxlan)
1018{
c6fcc4fc 1019 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
b1be00a6 1020#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1021 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1022
1023 rcu_assign_pointer(vxlan->vn6_sock, NULL);
544a773a
HFS		 1024#endif
1025
c6fcc4fc 1026 rcu_assign_pointer(vxlan->vn4_sock, NULL);
544a773a
HFS		 1027 synchronize_net();
1028
c6fcc4fc 1029 if (__vxlan_sock_release_prep(sock4)) {
1030 udp_tunnel_sock_release(sock4->sock);
1031 kfree(sock4);
544a773a
HFS		 1032 }
1033
1034#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1035 if (__vxlan_sock_release_prep(sock6)) {
1036 udp_tunnel_sock_release(sock6->sock);
1037 kfree(sock6);
544a773a 1038 }
b1be00a6
JB		 1039#endif
1040}
1041
56ef9c90 1042/* Update multicast group membership when first VNI on
c4b49512 1043 * multicast address is brought up
7c47cedf 1044 */
56ef9c90 1045static int vxlan_igmp_join(struct vxlan_dev *vxlan)
d342894c 1046{
b1be00a6 1047 struct sock *sk;
e4c7ed41
CW		 1048 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1049 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1050 int ret = -EINVAL;
d342894c 1051
e4c7ed41 1052 if (ip->sa.sa_family == AF_INET) {
c6fcc4fc 1053 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
e4c7ed41
CW		 1054 struct ip_mreqn mreq = {
1055 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1056 .imr_ifindex = ifindex,
1057 };
1058
c6fcc4fc 1059 sk = sock4->sock->sk;
b1be00a6 1060 lock_sock(sk);
56ef9c90 1061 ret = ip_mc_join_group(sk, &mreq);
b1be00a6 1062 release_sock(sk);
e4c7ed41
CW		 1063#if IS_ENABLED(CONFIG_IPV6)
1064 } else {
c6fcc4fc 1065 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1066
1067 sk = sock6->sock->sk;
b1be00a6 1068 lock_sock(sk);
56ef9c90
MRL		 1069 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1070 &ip->sin6.sin6_addr);
b1be00a6 1071 release_sock(sk);
e4c7ed41
CW		 1072#endif
1073 }
3fc2de2f 1074
56ef9c90 1075 return ret;
3fc2de2f 1076}
1077
1078/* Inverse of vxlan_igmp_join when last VNI is brought down */
56ef9c90 1079static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
3fc2de2f 1080{
b1be00a6 1081 struct sock *sk;
e4c7ed41
CW		 1082 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1083 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1084 int ret = -EINVAL;
3fc2de2f 1085
e4c7ed41 1086 if (ip->sa.sa_family == AF_INET) {
c6fcc4fc 1087 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
e4c7ed41
CW		 1088 struct ip_mreqn mreq = {
1089 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1090 .imr_ifindex = ifindex,
1091 };
1092
c6fcc4fc 1093 sk = sock4->sock->sk;
b1be00a6 1094 lock_sock(sk);
56ef9c90 1095 ret = ip_mc_leave_group(sk, &mreq);
b1be00a6 1096 release_sock(sk);
e4c7ed41
CW		 1097#if IS_ENABLED(CONFIG_IPV6)
1098 } else {
c6fcc4fc 1099 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1100
1101 sk = sock6->sock->sk;
b1be00a6 1102 lock_sock(sk);
56ef9c90
MRL		 1103 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1104 &ip->sin6.sin6_addr);
b1be00a6 1105 release_sock(sk);
e4c7ed41
CW		 1106#endif
1107 }
d342894c 1108
56ef9c90 1109 return ret;
d342894c 1110}
1111
f14ecebb
JB		 1112static bool vxlan_remcsum(struct vxlanhdr *unparsed,
1113 struct sk_buff *skb, u32 vxflags)
dfd8645e 1114{
7d34fa75 1115 size_t start, offset;
dfd8645e 1116
f14ecebb
JB		 1117 if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload)
1118 goto out;
b7fe10e5 1119
f14ecebb
JB		 1120 start = vxlan_rco_start(unparsed->vx_vni);
1121 offset = start + vxlan_rco_offset(unparsed->vx_vni);
dfd8645e 1122
7d34fa75 1123 if (!pskb_may_pull(skb, offset + sizeof(u16)))
be5cfeab 1124 return false;
dfd8645e 1125
be5cfeab
JB		 1126 skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset,
1127 !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL));
f14ecebb
JB		 1128out:
1129 unparsed->vx_flags &= ~VXLAN_HF_RCO;
1130 unparsed->vx_vni &= VXLAN_VNI_MASK;
be5cfeab 1131 return true;
dfd8645e
TH		 1132}
1133
f14ecebb 1134static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed,
64f87d36 1135 struct sk_buff *skb, u32 vxflags,
10a5af23 1136 struct vxlan_metadata *md)
3288af08 1137{
f14ecebb 1138 struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed;
10a5af23 1139 struct metadata_dst *tun_dst;
f14ecebb
JB		 1140
1141 if (!(unparsed->vx_flags & VXLAN_HF_GBP))
1142 goto out;
3288af08 1143
3288af08
JB		 1144 md->gbp = ntohs(gbp->policy_id);
1145
10a5af23 1146 tun_dst = (struct metadata_dst *)skb_dst(skb);
810813c4 1147 if (tun_dst) {
3288af08 1148 tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
810813c4
DM		 1149 tun_dst->u.tun_info.options_len = sizeof(*md);
1150 }
3288af08
JB		 1151 if (gbp->dont_learn)
1152 md->gbp |= VXLAN_GBP_DONT_LEARN;
1153
1154 if (gbp->policy_applied)
1155 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
f14ecebb 1156
64f87d36
JB		 1157 /* In flow-based mode, GBP is carried in dst_metadata */
1158 if (!(vxflags & VXLAN_F_COLLECT_METADATA))
1159 skb->mark = md->gbp;
f14ecebb
JB		 1160out:
1161 unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
3288af08
JB		 1162}
1163
e1e5314d 1164static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed,
61618eea 1165 __be16 *protocol,
e1e5314d
JB		 1166 struct sk_buff *skb, u32 vxflags)
1167{
1168 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed;
1169
1170 /* Need to have Next Protocol set for interfaces in GPE mode. */
1171 if (!gpe->np_applied)
1172 return false;
1173 /* "The initial version is 0. If a receiver does not support the
1174 * version indicated it MUST drop the packet.
1175 */
1176 if (gpe->version != 0)
1177 return false;
1178 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1179 * processing MUST occur." However, we don't implement OAM
1180 * processing, thus drop the packet.
1181 */
1182 if (gpe->oam_flag)
1183 return false;
1184
1185 switch (gpe->next_protocol) {
1186 case VXLAN_GPE_NP_IPV4:
1187 *protocol = htons(ETH_P_IP);
1188 break;
1189 case VXLAN_GPE_NP_IPV6:
1190 *protocol = htons(ETH_P_IPV6);
1191 break;
1192 case VXLAN_GPE_NP_ETHERNET:
1193 *protocol = htons(ETH_P_TEB);
1194 break;
1195 default:
1196 return false;
1197 }
1198
1199 unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS;
1200 return true;
1201}
1202
1ab016e2
JB		 1203static bool vxlan_set_mac(struct vxlan_dev *vxlan,
1204 struct vxlan_sock *vs,
1205 struct sk_buff *skb)
614732ea 1206{
614732ea 1207 union vxlan_addr saddr;
614732ea 1208
614732ea 1209 skb_reset_mac_header(skb);
614732ea
TG		 1210 skb->protocol = eth_type_trans(skb, vxlan->dev);
1211 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1212
1213 /* Ignore packet loops (and multicast echo) */
1214 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
1ab016e2 1215 return false;
614732ea 1216
760c6805 1217 /* Get address from the outer IP header */
ce212d0f 1218 if (vxlan_get_sk_family(vs) == AF_INET) {
1ab016e2 1219 saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
614732ea
TG		 1220 saddr.sa.sa_family = AF_INET;
1221#if IS_ENABLED(CONFIG_IPV6)
1222 } else {
1ab016e2 1223 saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
614732ea
TG		 1224 saddr.sa.sa_family = AF_INET6;
1225#endif
1226 }
1227
1ab016e2
JB		 1228 if ((vxlan->flags & VXLAN_F_LEARN) &&
1229 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source))
1230 return false;
1231
1232 return true;
1233}
1234
760c6805
JB		 1235static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph,
1236 struct sk_buff *skb)
1237{
1238 int err = 0;
1239
1240 if (vxlan_get_sk_family(vs) == AF_INET)
1241 err = IP_ECN_decapsulate(oiph, skb);
1242#if IS_ENABLED(CONFIG_IPV6)
1243 else
1244 err = IP6_ECN_decapsulate(oiph, skb);
1245#endif
1246
1247 if (unlikely(err) && log_ecn_error) {
1248 if (vxlan_get_sk_family(vs) == AF_INET)
1249 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1250 &((struct iphdr *)oiph)->saddr,
1251 ((struct iphdr *)oiph)->tos);
1252 else
1253 net_info_ratelimited("non-ECT from %pI6\n",
1254 &((struct ipv6hdr *)oiph)->saddr);
1255 }
1256 return err <= 1;
1257}
1258
d342894c 1259/* Callback from net/ipv4/udp.c to receive packets */
f2d1968e 1260static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
d342894c 1261{
f2d1968e 1262 struct pcpu_sw_netstats *stats;
c9e78efb 1263 struct vxlan_dev *vxlan;
5cfccc5a 1264 struct vxlan_sock *vs;
f14ecebb 1265 struct vxlanhdr unparsed;
ee122c79
TG		 1266 struct vxlan_metadata _md;
1267 struct vxlan_metadata *md = &_md;
61618eea 1268 __be16 protocol = htons(ETH_P_TEB);
e1e5314d 1269 bool raw_proto = false;
f2d1968e 1270 void *oiph;
d342894c 1271
e1e5314d 1272 /* Need UDP and VXLAN header to be present */
7ce04758 1273 if (!pskb_may_pull(skb, VXLAN_HLEN))
e5aed006 1274 goto drop;
d342894c 1275
f14ecebb 1276 unparsed = *vxlan_hdr(skb);
288b01c8
JB		 1277 /* VNI flag always required to be set */
1278 if (!(unparsed.vx_flags & VXLAN_HF_VNI)) {
1279 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1280 ntohl(vxlan_hdr(skb)->vx_flags),
1281 ntohl(vxlan_hdr(skb)->vx_vni));
1282 /* Return non vxlan pkt */
e5aed006 1283 goto drop;
d342894c 1284 }
288b01c8
JB		 1285 unparsed.vx_flags &= ~VXLAN_HF_VNI;
1286 unparsed.vx_vni &= ~VXLAN_VNI_MASK;
d342894c 1287
559835ea 1288 vs = rcu_dereference_sk_user_data(sk);
5cfccc5a 1289 if (!vs)
d342894c 1290 goto drop;
d342894c 1291
c9e78efb
JB		 1292 vxlan = vxlan_vs_find_vni(vs, vxlan_vni(vxlan_hdr(skb)->vx_vni));
1293 if (!vxlan)
1294 goto drop;
1295
e1e5314d
JB		 1296 /* For backwards compatibility, only allow reserved fields to be
1297 * used by VXLAN extensions if explicitly requested.
1298 */
1299 if (vs->flags & VXLAN_F_GPE) {
1300 if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags))
1301 goto drop;
1302 raw_proto = true;
1303 }
1304
1305 if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto,
1306 !net_eq(vxlan->net, dev_net(vxlan->dev))))
1307 goto drop;
c9e78efb 1308
ee122c79 1309 if (vxlan_collect_metadata(vs)) {
07dabf20 1310 __be32 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);
10a5af23 1311 struct metadata_dst *tun_dst;
07dabf20 1312
c29a70d2 1313 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
d817f432 1314 key32_to_tunnel_id(vni), sizeof(*md));
c29a70d2 1315
ee122c79
TG		 1316 if (!tun_dst)
1317 goto drop;
1318
0f1b7354 1319 md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
10a5af23
JB		 1320
1321 skb_dst_set(skb, (struct dst_entry *)tun_dst);
ee122c79
TG		 1322 } else {
1323 memset(md, 0, sizeof(*md));
1324 }
1325
f14ecebb
JB		 1326 if (vs->flags & VXLAN_F_REMCSUM_RX)
1327 if (!vxlan_remcsum(&unparsed, skb, vs->flags))
1328 goto drop;
1329 if (vs->flags & VXLAN_F_GBP)
10a5af23 1330 vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md);
e1e5314d
JB		 1331 /* Note that GBP and GPE can never be active together. This is
1332 * ensured in vxlan_dev_configure.
1333 */
3511494c 1334
f14ecebb 1335 if (unparsed.vx_flags || unparsed.vx_vni) {
3bf39475
TH		 1336 /* If there are any unprocessed flags remaining treat
1337 * this as a malformed packet. This behavior diverges from
1338 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1339 * in reserved fields are to be ignored. The approach here
c4b49512 1340 * maintains compatibility with previous stack code, and also
3bf39475
TH		 1341 * is more robust and provides a little more security in
1342 * adding extensions to VXLAN.
1343 */
288b01c8 1344 goto drop;
3bf39475
TH		 1345 }
1346
e1e5314d
JB		 1347 if (!raw_proto) {
1348 if (!vxlan_set_mac(vxlan, vs, skb))
1349 goto drop;
1350 } else {
8be0cfa4 1351 skb_reset_mac_header(skb);
e1e5314d
JB		 1352 skb->dev = vxlan->dev;
1353 skb->pkt_type = PACKET_HOST;
1354 }
f2d1968e 1355
f2d1968e
JB		 1356 oiph = skb_network_header(skb);
1357 skb_reset_network_header(skb);
1358
1359 if (!vxlan_ecn_decapsulate(vs, oiph, skb)) {
1360 ++vxlan->dev->stats.rx_frame_errors;
1361 ++vxlan->dev->stats.rx_errors;
1362 goto drop;
1363 }
1364
1365 stats = this_cpu_ptr(vxlan->dev->tstats);
1366 u64_stats_update_begin(&stats->syncp);
1367 stats->rx_packets++;
1368 stats->rx_bytes += skb->len;
1369 u64_stats_update_end(&stats->syncp);
1370
1371 gro_cells_receive(&vxlan->gro_cells, skb);
5cfccc5a
PS		 1372 return 0;
1373
1374drop:
288b01c8
JB		 1375 /* Consume bad packet */
1376 kfree_skb(skb);
1377 return 0;
5cfccc5a
PS		 1378}
1379
e4f67add
DS		 1380static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
1381{
1382 struct vxlan_dev *vxlan = netdev_priv(dev);
1383 struct arphdr *parp;
1384 u8 *arpptr, *sha;
1385 __be32 sip, tip;
1386 struct neighbour *n;
1387
1388 if (dev->flags & IFF_NOARP)
1389 goto out;
1390
1391 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1392 dev->stats.tx_dropped++;
1393 goto out;
1394 }
1395 parp = arp_hdr(skb);
1396
1397 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1398 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1399 parp->ar_pro != htons(ETH_P_IP) ||
1400 parp->ar_op != htons(ARPOP_REQUEST) ||
1401 parp->ar_hln != dev->addr_len ||
1402 parp->ar_pln != 4)
1403 goto out;
1404 arpptr = (u8 *)parp + sizeof(struct arphdr);
1405 sha = arpptr;
1406 arpptr += dev->addr_len; /* sha */
1407 memcpy(&sip, arpptr, sizeof(sip));
1408 arpptr += sizeof(sip);
1409 arpptr += dev->addr_len; /* tha */
1410 memcpy(&tip, arpptr, sizeof(tip));
1411
1412 if (ipv4_is_loopback(tip) ||
1413 ipv4_is_multicast(tip))
1414 goto out;
1415
1416 n = neigh_lookup(&arp_tbl, &tip, dev);
1417
1418 if (n) {
e4f67add
DS		 1419 struct vxlan_fdb *f;
1420 struct sk_buff *reply;
1421
1422 if (!(n->nud_state & NUD_CONNECTED)) {
1423 neigh_release(n);
1424 goto out;
1425 }
1426
1427 f = vxlan_find_mac(vxlan, n->ha);
e4c7ed41 1428 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
e4f67add
DS		 1429 /* bridge-local neighbor */
1430 neigh_release(n);
1431 goto out;
1432 }
1433
1434 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1435 n->ha, sha);
1436
1437 neigh_release(n);
1438
7346135d
DS		 1439 if (reply == NULL)
1440 goto out;
1441
e4f67add
DS		 1442 skb_reset_mac_header(reply);
1443 __skb_pull(reply, skb_network_offset(reply));
1444 reply->ip_summed = CHECKSUM_UNNECESSARY;
1445 reply->pkt_type = PACKET_HOST;
1446
1447 if (netif_rx_ni(reply) == NET_RX_DROP)
1448 dev->stats.rx_dropped++;
e4c7ed41
CW		 1449 } else if (vxlan->flags & VXLAN_F_L3MISS) {
1450 union vxlan_addr ipa = {
1451 .sin.sin_addr.s_addr = tip,
a45e92a5 1452 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1453 };
1454
1455 vxlan_ip_miss(dev, &ipa);
1456 }
e4f67add
DS		 1457out:
1458 consume_skb(skb);
1459 return NETDEV_TX_OK;
1460}
1461
f564f45c 1462#if IS_ENABLED(CONFIG_IPV6)
4b29dba9
DS		 1463static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1464 struct neighbour *n, bool isrouter)
1465{
1466 struct net_device *dev = request->dev;
1467 struct sk_buff *reply;
1468 struct nd_msg *ns, *na;
1469 struct ipv6hdr *pip6;
1470 u8 *daddr;
1471 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1472 int ns_olen;
1473 int i, len;
1474
1475 if (dev == NULL)
1476 return NULL;
1477
1478 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1479 sizeof(*na) + na_olen + dev->needed_tailroom;
1480 reply = alloc_skb(len, GFP_ATOMIC);
1481 if (reply == NULL)
1482 return NULL;
1483
1484 reply->protocol = htons(ETH_P_IPV6);
1485 reply->dev = dev;
1486 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1487 skb_push(reply, sizeof(struct ethhdr));
6297b91c 1488 skb_reset_mac_header(reply);
4b29dba9
DS		 1489
1490 ns = (struct nd_msg *)skb_transport_header(request);
1491
1492 daddr = eth_hdr(request)->h_source;
1493 ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns);
1494 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1495 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1496 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1497 break;
1498 }
1499 }
1500
1501 /* Ethernet header */
1502 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1503 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1504 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1505 reply->protocol = htons(ETH_P_IPV6);
1506
1507 skb_pull(reply, sizeof(struct ethhdr));
6297b91c 1508 skb_reset_network_header(reply);
4b29dba9
DS		 1509 skb_put(reply, sizeof(struct ipv6hdr));
1510
1511 /* IPv6 header */
1512
1513 pip6 = ipv6_hdr(reply);
1514 memset(pip6, 0, sizeof(struct ipv6hdr));
1515 pip6->version = 6;
1516 pip6->priority = ipv6_hdr(request)->priority;
1517 pip6->nexthdr = IPPROTO_ICMPV6;
1518 pip6->hop_limit = 255;
1519 pip6->daddr = ipv6_hdr(request)->saddr;
1520 pip6->saddr = *(struct in6_addr *)n->primary_key;
1521
1522 skb_pull(reply, sizeof(struct ipv6hdr));
6297b91c 1523 skb_reset_transport_header(reply);
4b29dba9
DS		 1524
1525 na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen);
1526
1527 /* Neighbor Advertisement */
1528 memset(na, 0, sizeof(*na)+na_olen);
1529 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1530 na->icmph.icmp6_router = isrouter;
1531 na->icmph.icmp6_override = 1;
1532 na->icmph.icmp6_solicited = 1;
1533 na->target = ns->target;
1534 ether_addr_copy(&na->opt[2], n->ha);
1535 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1536 na->opt[1] = na_olen >> 3;
1537
1538 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1539 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1540 csum_partial(na, sizeof(*na)+na_olen, 0));
1541
1542 pip6->payload_len = htons(sizeof(*na)+na_olen);
1543
1544 skb_push(reply, sizeof(struct ipv6hdr));
1545
1546 reply->ip_summed = CHECKSUM_UNNECESSARY;
1547
1548 return reply;
1549}
1550
f564f45c
CW		 1551static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
1552{
1553 struct vxlan_dev *vxlan = netdev_priv(dev);
4b29dba9 1554 struct nd_msg *msg;
f564f45c
CW		 1555 const struct ipv6hdr *iphdr;
1556 const struct in6_addr *saddr, *daddr;
4b29dba9
DS		 1557 struct neighbour *n;
1558 struct inet6_dev *in6_dev;
f564f45c
CW		 1559
1560 in6_dev = __in6_dev_get(dev);
1561 if (!in6_dev)
1562 goto out;
1563
f564f45c
CW		 1564 iphdr = ipv6_hdr(skb);
1565 saddr = &iphdr->saddr;
1566 daddr = &iphdr->daddr;
1567
f564f45c
CW		 1568 msg = (struct nd_msg *)skb_transport_header(skb);
1569 if (msg->icmph.icmp6_code != 0 ||
1570 msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
1571 goto out;
1572
4b29dba9
DS		 1573 if (ipv6_addr_loopback(daddr) ||
1574 ipv6_addr_is_multicast(&msg->target))
1575 goto out;
1576
1577 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
f564f45c
CW		 1578
1579 if (n) {
1580 struct vxlan_fdb *f;
4b29dba9 1581 struct sk_buff *reply;
f564f45c
CW		 1582
1583 if (!(n->nud_state & NUD_CONNECTED)) {
1584 neigh_release(n);
1585 goto out;
1586 }
1587
1588 f = vxlan_find_mac(vxlan, n->ha);
1589 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
1590 /* bridge-local neighbor */
1591 neigh_release(n);
1592 goto out;
1593 }
1594
4b29dba9
DS		 1595 reply = vxlan_na_create(skb, n,
1596 !!(f ? f->flags & NTF_ROUTER : 0));
1597
f564f45c 1598 neigh_release(n);
4b29dba9
DS		 1599
1600 if (reply == NULL)
1601 goto out;
1602
1603 if (netif_rx_ni(reply) == NET_RX_DROP)
1604 dev->stats.rx_dropped++;
1605
f564f45c 1606 } else if (vxlan->flags & VXLAN_F_L3MISS) {
4b29dba9
DS		 1607 union vxlan_addr ipa = {
1608 .sin6.sin6_addr = msg->target,
a45e92a5 1609 .sin6.sin6_family = AF_INET6,
4b29dba9
DS		 1610 };
1611
f564f45c
CW		 1612 vxlan_ip_miss(dev, &ipa);
1613 }
1614
1615out:
1616 consume_skb(skb);
1617 return NETDEV_TX_OK;
1618}
1619#endif
1620
e4f67add
DS		 1621static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
1622{
1623 struct vxlan_dev *vxlan = netdev_priv(dev);
1624 struct neighbour *n;
e4f67add
DS		 1625
1626 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1627 return false;
1628
1629 n = NULL;
1630 switch (ntohs(eth_hdr(skb)->h_proto)) {
1631 case ETH_P_IP:
e15a00aa
CW		 1632 {
1633 struct iphdr *pip;
1634
e4f67add
DS		 1635 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
1636 return false;
1637 pip = ip_hdr(skb);
1638 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
e4c7ed41
CW		 1639 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1640 union vxlan_addr ipa = {
1641 .sin.sin_addr.s_addr = pip->daddr,
a45e92a5 1642 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1643 };
1644
1645 vxlan_ip_miss(dev, &ipa);
1646 return false;
1647 }
1648
e4f67add 1649 break;
e15a00aa
CW		 1650 }
1651#if IS_ENABLED(CONFIG_IPV6)
1652 case ETH_P_IPV6:
1653 {
1654 struct ipv6hdr *pip6;
1655
1656 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
1657 return false;
1658 pip6 = ipv6_hdr(skb);
1659 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
1660 if (!n && (vxlan->flags & VXLAN_F_L3MISS)) {
1661 union vxlan_addr ipa = {
1662 .sin6.sin6_addr = pip6->daddr,
a45e92a5 1663 .sin6.sin6_family = AF_INET6,
e15a00aa
CW		 1664 };
1665
1666 vxlan_ip_miss(dev, &ipa);
1667 return false;
1668 }
1669
1670 break;
1671 }
1672#endif
e4f67add
DS		 1673 default:
1674 return false;
1675 }
1676
1677 if (n) {
1678 bool diff;
1679
7367d0b5 1680 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
e4f67add
DS		 1681 if (diff) {
1682 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
1683 dev->addr_len);
1684 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
1685 }
1686 neigh_release(n);
1687 return diff;
e4c7ed41
CW		 1688 }
1689
e4f67add
DS		 1690 return false;
1691}
1692
af33c1ad 1693static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
3511494c
TG		 1694 struct vxlan_metadata *md)
1695{
1696 struct vxlanhdr_gbp *gbp;
1697
db79a621
TG		 1698 if (!md->gbp)
1699 return;
1700
3511494c 1701 gbp = (struct vxlanhdr_gbp *)vxh;
54bfd872 1702 vxh->vx_flags |= VXLAN_HF_GBP;
3511494c
TG		 1703
1704 if (md->gbp & VXLAN_GBP_DONT_LEARN)
1705 gbp->dont_learn = 1;
1706
1707 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
1708 gbp->policy_applied = 1;
1709
1710 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
1711}
1712
e1e5314d
JB		 1713static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags,
1714 __be16 protocol)
1715{
1716 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh;
1717
1718 gpe->np_applied = 1;
1719
1720 switch (protocol) {
1721 case htons(ETH_P_IP):
1722 gpe->next_protocol = VXLAN_GPE_NP_IPV4;
1723 return 0;
1724 case htons(ETH_P_IPV6):
1725 gpe->next_protocol = VXLAN_GPE_NP_IPV6;
1726 return 0;
1727 case htons(ETH_P_TEB):
1728 gpe->next_protocol = VXLAN_GPE_NP_ETHERNET;
1729 return 0;
1730 }
1731 return -EPFNOSUPPORT;
1732}
1733
f491e56d
JB		 1734static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
1735 int iphdr_len, __be32 vni,
1736 struct vxlan_metadata *md, u32 vxflags,
b4ed5cad 1737 bool udp_sum)
e4c7ed41 1738{
e4c7ed41 1739 struct vxlanhdr *vxh;
e4c7ed41
CW		 1740 int min_headroom;
1741 int err;
dfd8645e 1742 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
e1e5314d 1743 __be16 inner_protocol = htons(ETH_P_TEB);
dfd8645e 1744
af33c1ad 1745 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 1746 skb->ip_summed == CHECKSUM_PARTIAL) {
1747 int csum_start = skb_checksum_start_offset(skb);
1748
1749 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
1750 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
1751 (skb->csum_offset == offsetof(struct udphdr, check) ||
b5708501 1752 skb->csum_offset == offsetof(struct tcphdr, check)))
dfd8645e 1753 type |= SKB_GSO_TUNNEL_REMCSUM;
dfd8645e 1754 }
e4c7ed41 1755
e4c7ed41 1756 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
4a4f86cc 1757 + VXLAN_HLEN + iphdr_len;
649c5b8b
PS		 1758
1759 /* Need space for new headers (invalidates iph ptr) */
1760 err = skb_cow_head(skb, min_headroom);
e1e5314d 1761 if (unlikely(err))
c46b7897 1762 return err;
649c5b8b 1763
aed069df
AD		 1764 err = iptunnel_handle_offloads(skb, type);
1765 if (err)
c46b7897 1766 return err;
b736a623 1767
49560532 1768 vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
54bfd872
JB		 1769 vxh->vx_flags = VXLAN_HF_VNI;
1770 vxh->vx_vni = vxlan_vni_field(vni);
49560532 1771
dfd8645e 1772 if (type & SKB_GSO_TUNNEL_REMCSUM) {
54bfd872 1773 unsigned int start;
dfd8645e 1774
54bfd872
JB		 1775 start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr);
1776 vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset);
1777 vxh->vx_flags |= VXLAN_HF_RCO;
dfd8645e
TH		 1778
1779 if (!skb_is_gso(skb)) {
1780 skb->ip_summed = CHECKSUM_NONE;
1781 skb->encapsulation = 0;
1782 }
1783 }
1784
af33c1ad
TH		 1785 if (vxflags & VXLAN_F_GBP)
1786 vxlan_build_gbp_hdr(vxh, vxflags, md);
e1e5314d
JB		 1787 if (vxflags & VXLAN_F_GPE) {
1788 err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol);
1789 if (err < 0)
c46b7897 1790 return err;
e1e5314d
JB		 1791 inner_protocol = skb->protocol;
1792 }
3511494c 1793
e1e5314d 1794 skb_set_inner_protocol(skb, inner_protocol);
039f5062 1795 return 0;
49560532 1796}
49560532 1797
655c3de1 1798static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev,
1799 struct vxlan_sock *sock4,
1a8496ba 1800 struct sk_buff *skb, int oif, u8 tos,
0c1d70af
PA		 1801 __be32 daddr, __be32 *saddr,
1802 struct dst_cache *dst_cache,
db3c6139 1803 const struct ip_tunnel_info *info)
1a8496ba 1804{
db3c6139 1805 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
1a8496ba
JB		 1806 struct rtable *rt = NULL;
1807 struct flowi4 fl4;
1808
655c3de1 1809 if (!sock4)
1810 return ERR_PTR(-EIO);
1811
db3c6139
DB		 1812 if (tos && !info)
1813 use_cache = false;
1814 if (use_cache) {
0c1d70af
PA		 1815 rt = dst_cache_get_ip4(dst_cache, saddr);
1816 if (rt)
1817 return rt;
1818 }
1819
1a8496ba
JB		 1820 memset(&fl4, 0, sizeof(fl4));
1821 fl4.flowi4_oif = oif;
1822 fl4.flowi4_tos = RT_TOS(tos);
1823 fl4.flowi4_mark = skb->mark;
1824 fl4.flowi4_proto = IPPROTO_UDP;
1825 fl4.daddr = daddr;
272d96a5 1826 fl4.saddr = *saddr;
1a8496ba
JB		 1827
1828 rt = ip_route_output_key(vxlan->net, &fl4);
655c3de1 1829 if (likely(!IS_ERR(rt))) {
1830 if (rt->dst.dev == dev) {
1831 netdev_dbg(dev, "circular route to %pI4\n", &daddr);
1832 ip_rt_put(rt);
1833 return ERR_PTR(-ELOOP);
1834 }
1835
1a8496ba 1836 *saddr = fl4.saddr;
0c1d70af
PA		 1837 if (use_cache)
1838 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
655c3de1 1839 } else {
1840 netdev_dbg(dev, "no route to %pI4\n", &daddr);
1841 return ERR_PTR(-ENETUNREACH);
0c1d70af 1842 }
1a8496ba
JB		 1843 return rt;
1844}
1845
e5d4b29f
JB		 1846#if IS_ENABLED(CONFIG_IPV6)
1847static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
655c3de1 1848 struct net_device *dev,
03dc52a8 1849 struct vxlan_sock *sock6,
1400615d 1850 struct sk_buff *skb, int oif, u8 tos,
e7f70af1 1851 __be32 label,
e5d4b29f 1852 const struct in6_addr *daddr,
0c1d70af 1853 struct in6_addr *saddr,
db3c6139
DB		 1854 struct dst_cache *dst_cache,
1855 const struct ip_tunnel_info *info)
e5d4b29f 1856{
db3c6139 1857 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
e5d4b29f
JB		 1858 struct dst_entry *ndst;
1859 struct flowi6 fl6;
1860 int err;
1861
c6fcc4fc 1862 if (!sock6)
1863 return ERR_PTR(-EIO);
1864
1400615d
DB		 1865 if (tos && !info)
1866 use_cache = false;
db3c6139 1867 if (use_cache) {
0c1d70af
PA		 1868 ndst = dst_cache_get_ip6(dst_cache, saddr);
1869 if (ndst)
1870 return ndst;
1871 }
1872
e5d4b29f
JB		 1873 memset(&fl6, 0, sizeof(fl6));
1874 fl6.flowi6_oif = oif;
1875 fl6.daddr = *daddr;
272d96a5 1876 fl6.saddr = *saddr;
eaa93bf4 1877 fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label);
e5d4b29f
JB		 1878 fl6.flowi6_mark = skb->mark;
1879 fl6.flowi6_proto = IPPROTO_UDP;
1880
1881 err = ipv6_stub->ipv6_dst_lookup(vxlan->net,
c6fcc4fc 1882 sock6->sock->sk,
e5d4b29f 1883 &ndst, &fl6);
655c3de1 1884 if (unlikely(err < 0)) {
1885 netdev_dbg(dev, "no route to %pI6\n", daddr);
1886 return ERR_PTR(-ENETUNREACH);
1887 }
1888
1889 if (unlikely(ndst->dev == dev)) {
1890 netdev_dbg(dev, "circular route to %pI6\n", daddr);
1891 dst_release(ndst);
1892 return ERR_PTR(-ELOOP);
1893 }
e5d4b29f
JB		 1894
1895 *saddr = fl6.saddr;
db3c6139 1896 if (use_cache)
0c1d70af 1897 dst_cache_set_ip6(dst_cache, ndst, saddr);
e5d4b29f
JB		 1898 return ndst;
1899}
1900#endif
1901
9dcc71e1
SS		 1902/* Bypass encapsulation if the destination is local */
1903static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
1904 struct vxlan_dev *dst_vxlan)
1905{
8f84985f 1906 struct pcpu_sw_netstats *tx_stats, *rx_stats;
e4c7ed41
CW		 1907 union vxlan_addr loopback;
1908 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
ce6502a8
LR		 1909 struct net_device *dev = skb->dev;
1910 int len = skb->len;
9dcc71e1 1911
8f84985f
LR		 1912 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
1913 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
9dcc71e1
SS		 1914 skb->pkt_type = PACKET_HOST;
1915 skb->encapsulation = 0;
1916 skb->dev = dst_vxlan->dev;
1917 __skb_pull(skb, skb_network_offset(skb));
1918
e4c7ed41
CW		 1919 if (remote_ip->sa.sa_family == AF_INET) {
1920 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1921 loopback.sa.sa_family = AF_INET;
1922#if IS_ENABLED(CONFIG_IPV6)
1923 } else {
1924 loopback.sin6.sin6_addr = in6addr_loopback;
1925 loopback.sa.sa_family = AF_INET6;
1926#endif
1927 }
1928
9dcc71e1 1929 if (dst_vxlan->flags & VXLAN_F_LEARN)
e4c7ed41 1930 vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
9dcc71e1
SS		 1931
1932 u64_stats_update_begin(&tx_stats->syncp);
1933 tx_stats->tx_packets++;
ce6502a8 1934 tx_stats->tx_bytes += len;
9dcc71e1
SS		 1935 u64_stats_update_end(&tx_stats->syncp);
1936
1937 if (netif_rx(skb) == NET_RX_SUCCESS) {
1938 u64_stats_update_begin(&rx_stats->syncp);
1939 rx_stats->rx_packets++;
ce6502a8 1940 rx_stats->rx_bytes += len;
9dcc71e1
SS		 1941 u64_stats_update_end(&rx_stats->syncp);
1942 } else {
ce6502a8 1943 dev->stats.rx_dropped++;
9dcc71e1
SS		 1944 }
1945}
1946
fee1fad7 1947static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev,
1948 struct vxlan_dev *vxlan, union vxlan_addr *daddr,
1949 __be32 dst_port, __be32 vni, struct dst_entry *dst,
1950 u32 rt_flags)
1951{
1952#if IS_ENABLED(CONFIG_IPV6)
1953 /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of
1954 * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple
1955 * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry.
1956 */
1957 BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL);
1958#endif
1959 /* Bypass encapsulation if the destination is local */
1960 if (rt_flags & RTCF_LOCAL &&
1961 !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
1962 struct vxlan_dev *dst_vxlan;
1963
1964 dst_release(dst);
1965 dst_vxlan = vxlan_find_vni(vxlan->net, vni,
1966 daddr->sa.sa_family, dst_port,
1967 vxlan->flags);
1968 if (!dst_vxlan) {
1969 dev->stats.tx_errors++;
1970 kfree_skb(skb);
1971
1972 return -ENOENT;
1973 }
1974 vxlan_encap_bypass(skb, vxlan, dst_vxlan);
1975 return 1;
1976 }
1977
1978 return 0;
1979}
1980
4ad16930
SH		 1981static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
1982 struct vxlan_rdst *rdst, bool did_rsc)
d342894c 1983{
d71785ff 1984 struct dst_cache *dst_cache;
3093fbe7 1985 struct ip_tunnel_info *info;
d342894c 1986 struct vxlan_dev *vxlan = netdev_priv(dev);
0770b53b 1987 const struct iphdr *old_iph = ip_hdr(skb);
e4c7ed41 1988 union vxlan_addr *dst;
272d96a5 1989 union vxlan_addr remote_ip, local_ip;
1990 union vxlan_addr *src;
ee122c79
TG		 1991 struct vxlan_metadata _md;
1992 struct vxlan_metadata *md = &_md;
e4c7ed41 1993 __be16 src_port = 0, dst_port;
655c3de1 1994 struct dst_entry *ndst = NULL;
e7f70af1 1995 __be32 vni, label;
d342894c 1996 __u8 tos, ttl;
0e6fbc5b 1997 int err;
ee122c79 1998 u32 flags = vxlan->flags;
b4ed5cad 1999 bool udp_sum = false;
f491e56d 2000 bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
d342894c 2001
61adedf3 2002 info = skb_tunnel_info(skb);
3093fbe7 2003
ee122c79 2004 if (rdst) {
0770b53b 2005 dst = &rdst->remote_ip;
2006 if (vxlan_addr_any(dst)) {
2007 if (did_rsc) {
2008 /* short-circuited back to local bridge */
2009 vxlan_encap_bypass(skb, vxlan, vxlan);
2010 return;
2011 }
2012 goto drop;
2013 }
2014
0dfbdf41 2015 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
ee122c79 2016 vni = rdst->remote_vni;
272d96a5 2017 src = &vxlan->cfg.saddr;
d71785ff 2018 dst_cache = &rdst->dst_cache;
0770b53b 2019 md->gbp = skb->mark;
2020 ttl = vxlan->cfg.ttl;
2021 if (!ttl && vxlan_addr_multicast(dst))
2022 ttl = 1;
2023
2024 tos = vxlan->cfg.tos;
2025 if (tos == 1)
2026 tos = ip_tunnel_get_dsfield(old_iph, skb);
2027
2028 if (dst->sa.sa_family == AF_INET)
2029 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
2030 else
2031 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
2032 label = vxlan->cfg.label;
ee122c79
TG		 2033 } else {
2034 if (!info) {
2035 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
2036 dev->name);
2037 goto drop;
2038 }
b1be00a6 2039 remote_ip.sa.sa_family = ip_tunnel_info_af(info);
272d96a5 2040 if (remote_ip.sa.sa_family == AF_INET) {
a725e514 2041 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
272d96a5 2042 local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src;
2043 } else {
a725e514 2044 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
272d96a5 2045 local_ip.sin6.sin6_addr = info->key.u.ipv6.src;
2046 }
ee122c79 2047 dst = &remote_ip;
0770b53b 2048 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
2049 vni = tunnel_id_to_key32(info->key.tun_id);
272d96a5 2050 src = &local_ip;
d71785ff 2051 dst_cache = &info->dst_cache;
0770b53b 2052 if (info->options_len)
2053 md = ip_tunnel_info_opts(info);
a725e514
JB		 2054 ttl = info->key.ttl;
2055 tos = info->key.tos;
e7f70af1 2056 label = info->key.label;
b4ed5cad 2057 udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
a725e514 2058 }
0770b53b 2059 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2060 vxlan->cfg.port_max, true);
a725e514 2061
e4c7ed41 2062 if (dst->sa.sa_family == AF_INET) {
c6fcc4fc 2063 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
c46b7897 2064 struct rtable *rt;
0770b53b 2065 __be16 df = 0;
c6fcc4fc 2066
655c3de1 2067 rt = vxlan_get_route(vxlan, dev, sock4, skb,
1a8496ba 2068 rdst ? rdst->remote_ifindex : 0, tos,
272d96a5 2069 dst->sin.sin_addr.s_addr,
2070 &src->sin.sin_addr.s_addr,
d71785ff 2071 dst_cache, info);
8ebd115b
DM		 2072 if (IS_ERR(rt)) {
2073 err = PTR_ERR(rt);
c46b7897 2074 goto tx_error;
8ebd115b 2075 }
e4c7ed41
CW		 2076
2077 /* Bypass encapsulation if the destination is local */
fee1fad7 2078 if (!info) {
2079 err = encap_bypass_if_local(skb, dev, vxlan, dst,
2080 dst_port, vni, &rt->dst,
2081 rt->rt_flags);
2082 if (err)
2083 return;
fee1fad7 2084 } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) {
6ceb31ca 2085 df = htons(IP_DF);
fee1fad7 2086 }
6ceb31ca 2087
c46b7897 2088 ndst = &rt->dst;
e4c7ed41
CW		 2089 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2090 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
c46b7897 2091 err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr),
54bfd872 2092 vni, md, flags, udp_sum);
f491e56d 2093 if (err < 0)
c46b7897 2094 goto tx_error;
f491e56d 2095
0770b53b 2096 udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, src->sin.sin_addr.s_addr,
f491e56d
JB		 2097 dst->sin.sin_addr.s_addr, tos, ttl, df,
2098 src_port, dst_port, xnet, !udp_sum);
e4c7ed41
CW		 2099#if IS_ENABLED(CONFIG_IPV6)
2100 } else {
c6fcc4fc 2101 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
e4c7ed41 2102
655c3de1 2103 ndst = vxlan6_get_route(vxlan, dev, sock6, skb,
1400615d 2104 rdst ? rdst->remote_ifindex : 0, tos,
272d96a5 2105 label, &dst->sin6.sin6_addr,
2106 &src->sin6.sin6_addr,
db3c6139 2107 dst_cache, info);
e5d4b29f 2108 if (IS_ERR(ndst)) {
8ebd115b 2109 err = PTR_ERR(ndst);
c46b7897 2110 ndst = NULL;
9dcc71e1 2111 goto tx_error;
e4c7ed41 2112 }
655c3de1 2113
fee1fad7 2114 if (!info) {
2115 u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
49560532 2116
fee1fad7 2117 err = encap_bypass_if_local(skb, dev, vxlan, dst,
2118 dst_port, vni, ndst,
2119 rt6i_flags);
2120 if (err)
2121 return;
fee1fad7 2122 }
35e2d115 2123
1400615d 2124 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
e4c7ed41 2125 ttl = ttl ? : ip6_dst_hoplimit(ndst);
f491e56d
JB		 2126 skb_scrub_packet(skb, xnet);
2127 err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
54bfd872 2128 vni, md, flags, udp_sum);
c46b7897 2129 if (err < 0)
2130 goto tx_error;
2131
0770b53b 2132 udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev,
272d96a5 2133 &src->sin6.sin6_addr,
2134 &dst->sin6.sin6_addr, tos, ttl,
e7f70af1 2135 label, src_port, dst_port, !udp_sum);
e4c7ed41
CW		 2136#endif
2137 }
4ad16930 2138 return;
d342894c 2139
2140drop:
2141 dev->stats.tx_dropped++;
c46b7897 2142 dev_kfree_skb(skb);
2143 return;
d342894c 2144
2145tx_error:
655c3de1 2146 if (err == -ELOOP)
2147 dev->stats.collisions++;
2148 else if (err == -ENETUNREACH)
2149 dev->stats.tx_carrier_errors++;
c46b7897 2150 dst_release(ndst);
d342894c 2151 dev->stats.tx_errors++;
c46b7897 2152 kfree_skb(skb);
d342894c 2153}
2154
6681712d
DS		 2155/* Transmit local packets over Vxlan
2156 *
2157 * Outer IP header inherits ECN and DF from inner header.
2158 * Outer UDP destination is the VXLAN assigned port.
2159 * source port is based on hash of flow
2160 */
2161static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2162{
2163 struct vxlan_dev *vxlan = netdev_priv(dev);
3093fbe7 2164 const struct ip_tunnel_info *info;
6681712d
DS		 2165 struct ethhdr *eth;
2166 bool did_rsc = false;
8f646c92 2167 struct vxlan_rdst *rdst, *fdst = NULL;
6681712d 2168 struct vxlan_fdb *f;
6681712d 2169
61adedf3 2170 info = skb_tunnel_info(skb);
3093fbe7 2171
6681712d 2172 skb_reset_mac_header(skb);
6681712d 2173
47e5d1b0
JB		 2174 if (vxlan->flags & VXLAN_F_COLLECT_METADATA) {
2175 if (info && info->mode & IP_TUNNEL_INFO_TX)
2176 vxlan_xmit_one(skb, dev, NULL, false);
2177 else
2178 kfree_skb(skb);
2179 return NETDEV_TX_OK;
2180 }
2181
2182 if (vxlan->flags & VXLAN_F_PROXY) {
2183 eth = eth_hdr(skb);
f564f45c
CW		 2184 if (ntohs(eth->h_proto) == ETH_P_ARP)
2185 return arp_reduce(dev, skb);
2186#if IS_ENABLED(CONFIG_IPV6)
2187 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
91269e39
LR		 2188 pskb_may_pull(skb, sizeof(struct ipv6hdr)
2189 + sizeof(struct nd_msg)) &&
f564f45c
CW		 2190 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2191 struct nd_msg *msg;
2192
2193 msg = (struct nd_msg *)skb_transport_header(skb);
2194 if (msg->icmph.icmp6_code == 0 &&
2195 msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
2196 return neigh_reduce(dev, skb);
2197 }
2198#endif
2199 }
6681712d 2200
47e5d1b0 2201 eth = eth_hdr(skb);
6681712d 2202 f = vxlan_find_mac(vxlan, eth->h_dest);
ae884082
DS		 2203 did_rsc = false;
2204
2205 if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) &&
e15a00aa
CW		 2206 (ntohs(eth->h_proto) == ETH_P_IP ||
2207 ntohs(eth->h_proto) == ETH_P_IPV6)) {
ae884082
DS		 2208 did_rsc = route_shortcircuit(dev, skb);
2209 if (did_rsc)
2210 f = vxlan_find_mac(vxlan, eth->h_dest);
2211 }
2212
6681712d 2213 if (f == NULL) {
afbd8bae
MR		 2214 f = vxlan_find_mac(vxlan, all_zeros_mac);
2215 if (f == NULL) {
2216 if ((vxlan->flags & VXLAN_F_L2MISS) &&
2217 !is_multicast_ether_addr(eth->h_dest))
2218 vxlan_fdb_miss(vxlan, eth->h_dest);
2219
2220 dev->stats.tx_dropped++;
8f646c92 2221 kfree_skb(skb);
afbd8bae
MR		 2222 return NETDEV_TX_OK;
2223 }
2224 }
6681712d 2225
afbd8bae
MR		 2226 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2227 struct sk_buff *skb1;
6681712d 2228
8f646c92
ED		 2229 if (!fdst) {
2230 fdst = rdst;
2231 continue;
2232 }
afbd8bae
MR		 2233 skb1 = skb_clone(skb, GFP_ATOMIC);
2234 if (skb1)
2235 vxlan_xmit_one(skb1, dev, rdst, did_rsc);
6681712d
DS		 2236 }
2237
8f646c92
ED		 2238 if (fdst)
2239 vxlan_xmit_one(skb, dev, fdst, did_rsc);
2240 else
2241 kfree_skb(skb);
4ad16930 2242 return NETDEV_TX_OK;
6681712d
DS		 2243}
2244
d342894c 2245/* Walk the forwarding table and purge stale entries */
2246static void vxlan_cleanup(unsigned long arg)
2247{
2248 struct vxlan_dev *vxlan = (struct vxlan_dev *) arg;
2249 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2250 unsigned int h;
2251
2252 if (!netif_running(vxlan->dev))
2253 return;
2254
d342894c 2255 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2256 struct hlist_node *p, *n;
14e1d0fa
SD		 2257
2258 spin_lock_bh(&vxlan->hash_lock);
d342894c 2259 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2260 struct vxlan_fdb *f
2261 = container_of(p, struct vxlan_fdb, hlist);
2262 unsigned long timeout;
2263
3c172868 2264 if (f->state & NUD_PERMANENT)
d342894c 2265 continue;
2266
0dfbdf41 2267 timeout = f->used + vxlan->cfg.age_interval * HZ;
d342894c 2268 if (time_before_eq(timeout, jiffies)) {
2269 netdev_dbg(vxlan->dev,
2270 "garbage collect %pM\n",
2271 f->eth_addr);
2272 f->state = NUD_STALE;
2273 vxlan_fdb_destroy(vxlan, f);
2274 } else if (time_before(timeout, next_timer))
2275 next_timer = timeout;
2276 }
14e1d0fa 2277 spin_unlock_bh(&vxlan->hash_lock);
d342894c 2278 }
d342894c 2279
2280 mod_timer(&vxlan->age_timer, next_timer);
2281}
2282
9c2e24e1
PS		 2283static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
2284{
56ef9c90 2285 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
54bfd872 2286 __be32 vni = vxlan->default_dst.remote_vni;
9c2e24e1 2287
56ef9c90 2288 spin_lock(&vn->sock_lock);
9c2e24e1 2289 hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
56ef9c90 2290 spin_unlock(&vn->sock_lock);
9c2e24e1
PS		 2291}
2292
d342894c 2293/* Setup stats when device is created */
2294static int vxlan_init(struct net_device *dev)
2295{
1c213bd2 2296 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
e8171045 2297 if (!dev->tstats)
d342894c 2298 return -ENOMEM;
2299
2300 return 0;
2301}
2302
ba609e9b 2303static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan)
afbd8bae
MR		 2304{
2305 struct vxlan_fdb *f;
2306
2307 spin_lock_bh(&vxlan->hash_lock);
2308 f = __vxlan_find_mac(vxlan, all_zeros_mac);
2309 if (f)
2310 vxlan_fdb_destroy(vxlan, f);
2311 spin_unlock_bh(&vxlan->hash_lock);
2312}
2313
ebf4063e
SH		 2314static void vxlan_uninit(struct net_device *dev)
2315{
2316 struct vxlan_dev *vxlan = netdev_priv(dev);
ebf4063e 2317
ba609e9b 2318 vxlan_fdb_delete_default(vxlan);
afbd8bae 2319
ebf4063e
SH		 2320 free_percpu(dev->tstats);
2321}
2322
d342894c 2323/* Start ageing timer and join group when device is brought up */
2324static int vxlan_open(struct net_device *dev)
2325{
2326 struct vxlan_dev *vxlan = netdev_priv(dev);
205f356d 2327 int ret;
56ef9c90 2328
205f356d
JB		 2329 ret = vxlan_sock_add(vxlan);
2330 if (ret < 0)
2331 return ret;
d342894c 2332
79d4a94f 2333 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
56ef9c90 2334 ret = vxlan_igmp_join(vxlan);
bef0057b
MRL		 2335 if (ret == -EADDRINUSE)
2336 ret = 0;
56ef9c90 2337 if (ret) {
205f356d 2338 vxlan_sock_release(vxlan);
56ef9c90
MRL		 2339 return ret;
2340 }
d342894c 2341 }
2342
0dfbdf41 2343 if (vxlan->cfg.age_interval)
d342894c 2344 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2345
56ef9c90 2346 return ret;
d342894c 2347}
2348
2349/* Purge the forwarding table */
2350static void vxlan_flush(struct vxlan_dev *vxlan)
2351{
31fec5aa 2352 unsigned int h;
d342894c 2353
2354 spin_lock_bh(&vxlan->hash_lock);
2355 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2356 struct hlist_node *p, *n;
2357 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2358 struct vxlan_fdb *f
2359 = container_of(p, struct vxlan_fdb, hlist);
afbd8bae
MR		 2360 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2361 if (!is_zero_ether_addr(f->eth_addr))
2362 vxlan_fdb_destroy(vxlan, f);
d342894c 2363 }
2364 }
2365 spin_unlock_bh(&vxlan->hash_lock);
2366}
2367
2368/* Cleanup timer and forwarding table on shutdown */
2369static int vxlan_stop(struct net_device *dev)
2370{
2371 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2372 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
56ef9c90 2373 int ret = 0;
d342894c 2374
24c0e683 2375 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
f13b1689 2376 !vxlan_group_used(vn, vxlan))
56ef9c90 2377 ret = vxlan_igmp_leave(vxlan);
d342894c 2378
2379 del_timer_sync(&vxlan->age_timer);
2380
2381 vxlan_flush(vxlan);
205f356d 2382 vxlan_sock_release(vxlan);
d342894c 2383
56ef9c90 2384 return ret;
d342894c 2385}
2386
d342894c 2387/* Stub, nothing needs to be done. */
2388static void vxlan_set_multicast_list(struct net_device *dev)
2389{
2390}
2391
91572088 2392static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
345010b5 2393{
91572088
JW		 2394 struct vxlan_dev *vxlan = netdev_priv(dev);
2395 struct vxlan_rdst *dst = &vxlan->default_dst;
2396 struct net_device *lowerdev = __dev_get_by_index(vxlan->net,
2397 dst->remote_ifindex);
2398 bool use_ipv6 = false;
345010b5
DB		 2399
2400 if (dst->remote_ip.sa.sa_family == AF_INET6)
91572088 2401 use_ipv6 = true;
345010b5 2402
91572088
JW		 2403 /* This check is different than dev->max_mtu, because it looks at
2404 * the lowerdev->mtu, rather than the static dev->max_mtu
2405 */
2406 if (lowerdev) {
2407 int max_mtu = lowerdev->mtu -
2408 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
2409 if (new_mtu > max_mtu)
72564b59 2410 return -EINVAL;
72564b59
DW		 2411 }
2412
345010b5
DB		 2413 dev->mtu = new_mtu;
2414 return 0;
2415}
2416
fc4099f1
PS		 2417static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
2418{
2419 struct vxlan_dev *vxlan = netdev_priv(dev);
2420 struct ip_tunnel_info *info = skb_tunnel_info(skb);
2421 __be16 sport, dport;
2422
2423 sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2424 vxlan->cfg.port_max, true);
2425 dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
2426
239e944f 2427 if (ip_tunnel_info_af(info) == AF_INET) {
c6fcc4fc 2428 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
1a8496ba
JB		 2429 struct rtable *rt;
2430
655c3de1 2431 rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos,
1a8496ba 2432 info->key.u.ipv4.dst,
0c1d70af 2433 &info->key.u.ipv4.src, NULL, info);
1a8496ba
JB		 2434 if (IS_ERR(rt))
2435 return PTR_ERR(rt);
2436 ip_rt_put(rt);
239e944f
JB		 2437 } else {
2438#if IS_ENABLED(CONFIG_IPV6)
03dc52a8 2439 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
239e944f
JB		 2440 struct dst_entry *ndst;
2441
655c3de1 2442 ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos,
e7f70af1 2443 info->key.label, &info->key.u.ipv6.dst,
db3c6139 2444 &info->key.u.ipv6.src, NULL, info);
239e944f
JB		 2445 if (IS_ERR(ndst))
2446 return PTR_ERR(ndst);
2447 dst_release(ndst);
239e944f
JB		 2448#else /* !CONFIG_IPV6 */
2449 return -EPFNOSUPPORT;
2450#endif
2451 }
1a8496ba
JB		 2452 info->key.tp_src = sport;
2453 info->key.tp_dst = dport;
239e944f 2454 return 0;
fc4099f1
PS		 2455}
2456
0c867c9b 2457static const struct net_device_ops vxlan_netdev_ether_ops = {
d342894c 2458 .ndo_init = vxlan_init,
ebf4063e 2459 .ndo_uninit = vxlan_uninit,
d342894c 2460 .ndo_open = vxlan_open,
2461 .ndo_stop = vxlan_stop,
2462 .ndo_start_xmit = vxlan_xmit,
e8171045 2463 .ndo_get_stats64 = ip_tunnel_get_stats64,
d342894c 2464 .ndo_set_rx_mode = vxlan_set_multicast_list,
345010b5 2465 .ndo_change_mtu = vxlan_change_mtu,
d342894c 2466 .ndo_validate_addr = eth_validate_addr,
2467 .ndo_set_mac_address = eth_mac_addr,
2468 .ndo_fdb_add = vxlan_fdb_add,
2469 .ndo_fdb_del = vxlan_fdb_delete,
2470 .ndo_fdb_dump = vxlan_fdb_dump,
fc4099f1 2471 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
d342894c 2472};
2473
e1e5314d
JB		 2474static const struct net_device_ops vxlan_netdev_raw_ops = {
2475 .ndo_init = vxlan_init,
2476 .ndo_uninit = vxlan_uninit,
2477 .ndo_open = vxlan_open,
2478 .ndo_stop = vxlan_stop,
2479 .ndo_start_xmit = vxlan_xmit,
2480 .ndo_get_stats64 = ip_tunnel_get_stats64,
2481 .ndo_change_mtu = vxlan_change_mtu,
2482 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
2483};
2484
d342894c 2485/* Info for udev, that this is a virtual tunnel endpoint */
2486static struct device_type vxlan_type = {
2487 .name = "vxlan",
2488};
2489
e5de25dc 2490/* Calls the ndo_udp_tunnel_add of the caller in order to
35e42379 2491 * supply the listening VXLAN udp ports. Callers are expected
e5de25dc 2492 * to implement the ndo_udp_tunnel_add.
53cf5275 2493 */
b7aade15 2494static void vxlan_push_rx_ports(struct net_device *dev)
53cf5275
JG		 2495{
2496 struct vxlan_sock *vs;
2497 struct net *net = dev_net(dev);
2498 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
35e42379 2499 unsigned int i;
53cf5275
JG		 2500
2501 spin_lock(&vn->sock_lock);
2502 for (i = 0; i < PORT_HASH_SIZE; ++i) {
e7b3db5e
AD		 2503 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist)
2504 udp_tunnel_push_rx_port(dev, vs->sock,
b9adcd69
AD		 2505 (vs->flags & VXLAN_F_GPE) ?
2506 UDP_TUNNEL_TYPE_VXLAN_GPE :
e7b3db5e 2507 UDP_TUNNEL_TYPE_VXLAN);
53cf5275
JG		 2508 }
2509 spin_unlock(&vn->sock_lock);
2510}
53cf5275 2511
d342894c 2512/* Initialize the device structure. */
2513static void vxlan_setup(struct net_device *dev)
2514{
2515 struct vxlan_dev *vxlan = netdev_priv(dev);
31fec5aa 2516 unsigned int h;
d342894c 2517
65226ef8
JB		 2518 eth_hw_addr_random(dev);
2519 ether_setup(dev);
2520
ebf4063e 2521 dev->destructor = free_netdev;
d342894c 2522 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
2523
d342894c 2524 dev->features |= NETIF_F_LLTX;
d6727fe3 2525 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
0afb1666 2526 dev->features |= NETIF_F_RXCSUM;
05c0db08 2527 dev->features |= NETIF_F_GSO_SOFTWARE;
0afb1666 2528
1eaa8178 2529 dev->vlan_features = dev->features;
0afb1666 2530 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
05c0db08 2531 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
02875878 2532 netif_keep_dst(dev);
0c867c9b 2533 dev->priv_flags |= IFF_NO_QUEUE;
d342894c 2534
553675fb 2535 INIT_LIST_HEAD(&vxlan->next);
d342894c 2536 spin_lock_init(&vxlan->hash_lock);
2537
2538 init_timer_deferrable(&vxlan->age_timer);
2539 vxlan->age_timer.function = vxlan_cleanup;
2540 vxlan->age_timer.data = (unsigned long) vxlan;
2541
0dfbdf41 2542 vxlan->cfg.dst_port = htons(vxlan_port);
05f47d69 2543
d342894c 2544 vxlan->dev = dev;
2545
58ce31cc
TH		 2546 gro_cells_init(&vxlan->gro_cells, dev);
2547
d342894c 2548 for (h = 0; h < FDB_HASH_SIZE; ++h)
2549 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
2550}
2551
0c867c9b
JB		 2552static void vxlan_ether_setup(struct net_device *dev)
2553{
0c867c9b
JB		 2554 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
2555 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2556 dev->netdev_ops = &vxlan_netdev_ether_ops;
2557}
2558
e1e5314d
JB		 2559static void vxlan_raw_setup(struct net_device *dev)
2560{
65226ef8 2561 dev->header_ops = NULL;
e1e5314d
JB		 2562 dev->type = ARPHRD_NONE;
2563 dev->hard_header_len = 0;
2564 dev->addr_len = 0;
e1e5314d
JB		 2565 dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2566 dev->netdev_ops = &vxlan_netdev_raw_ops;
2567}
2568
d342894c 2569static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
2570 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
5d174dd8 2571 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
e4c7ed41 2572 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
d342894c 2573 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
2574 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
e4c7ed41 2575 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
d342894c 2576 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
2577 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
e7f70af1 2578 [IFLA_VXLAN_LABEL] = { .type = NLA_U32 },
d342894c 2579 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
2580 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
2581 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
05f47d69 2582 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
e4f67add
DS		 2583 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
2584 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
2585 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
2586 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
f8a9b1bc 2587 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
823aa873 2588 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
5c91ae08
TH		 2589 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
2590 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
2591 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
dfd8645e
TH		 2592 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
2593 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
3511494c 2594 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
e1e5314d 2595 [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, },
0ace2ca8 2596 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
d342894c 2597};
2598
2599static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
2600{
2601 if (tb[IFLA_ADDRESS]) {
2602 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
2603 pr_debug("invalid link address (not ethernet)\n");
2604 return -EINVAL;
2605 }
2606
2607 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
2608 pr_debug("invalid all zero ethernet address\n");
2609 return -EADDRNOTAVAIL;
2610 }
2611 }
2612
2613 if (!data)
2614 return -EINVAL;
2615
2616 if (data[IFLA_VXLAN_ID]) {
2617 __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
2618 if (id >= VXLAN_VID_MASK)
2619 return -ERANGE;
2620 }
2621
05f47d69 2622 if (data[IFLA_VXLAN_PORT_RANGE]) {
2623 const struct ifla_vxlan_port_range *p
2624 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
2625
2626 if (ntohs(p->high) < ntohs(p->low)) {
2627 pr_debug("port range %u .. %u not valid\n",
2628 ntohs(p->low), ntohs(p->high));
2629 return -EINVAL;
2630 }
2631 }
2632
d342894c 2633 return 0;
2634}
2635
1b13c97f
YB		 2636static void vxlan_get_drvinfo(struct net_device *netdev,
2637 struct ethtool_drvinfo *drvinfo)
2638{
2639 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
2640 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
2641}
2642
2643static const struct ethtool_ops vxlan_ethtool_ops = {
2644 .get_drvinfo = vxlan_get_drvinfo,
2645 .get_link = ethtool_op_get_link,
2646};
2647
3ee64f39
TH		 2648static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
2649 __be16 port, u32 flags)
553675fb 2650{
e4c7ed41 2651 struct socket *sock;
3ee64f39
TH		 2652 struct udp_port_cfg udp_conf;
2653 int err;
e4c7ed41 2654
3ee64f39 2655 memset(&udp_conf, 0, sizeof(udp_conf));
e4c7ed41 2656
3ee64f39
TH		 2657 if (ipv6) {
2658 udp_conf.family = AF_INET6;
3ee64f39 2659 udp_conf.use_udp6_rx_checksums =
3dc2b6a8 2660 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
a43a9ef6 2661 udp_conf.ipv6_v6only = 1;
3ee64f39
TH		 2662 } else {
2663 udp_conf.family = AF_INET;
e4c7ed41 2664 }
e4c7ed41 2665
3ee64f39 2666 udp_conf.local_udp_port = port;
553675fb 2667
3ee64f39
TH		 2668 /* Open UDP socket */
2669 err = udp_sock_create(net, &udp_conf, &sock);
2670 if (err < 0)
2671 return ERR_PTR(err);
e4c7ed41 2672
39deb2c7 2673 return sock;
e4c7ed41
CW		 2674}
2675
2676/* Create new listen socket if needed */
b1be00a6
JB		 2677static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
2678 __be16 port, u32 flags)
e4c7ed41
CW		 2679{
2680 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
2681 struct vxlan_sock *vs;
2682 struct socket *sock;
e4c7ed41 2683 unsigned int h;
acbf74a7 2684 struct udp_tunnel_sock_cfg tunnel_cfg;
e4c7ed41 2685
dc01e7d3 2686 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
e4c7ed41
CW		 2687 if (!vs)
2688 return ERR_PTR(-ENOMEM);
2689
2690 for (h = 0; h < VNI_HASH_SIZE; ++h)
2691 INIT_HLIST_HEAD(&vs->vni_list[h]);
2692
3ee64f39 2693 sock = vxlan_create_sock(net, ipv6, port, flags);
39deb2c7 2694 if (IS_ERR(sock)) {
56ef9c90
MRL		 2695 pr_info("Cannot bind port %d, err=%ld\n", ntohs(port),
2696 PTR_ERR(sock));
553675fb 2697 kfree(vs);
e50fddc8 2698 return ERR_CAST(sock);
553675fb 2699 }
e4c7ed41
CW		 2700
2701 vs->sock = sock;
9c2e24e1 2702 atomic_set(&vs->refcnt, 1);
af33c1ad 2703 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
553675fb 2704
9c2e24e1
PS		 2705 spin_lock(&vn->sock_lock);
2706 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
e7b3db5e 2707 udp_tunnel_notify_add_rx_port(sock,
b9adcd69
AD		 2708 (vs->flags & VXLAN_F_GPE) ?
2709 UDP_TUNNEL_TYPE_VXLAN_GPE :
e7b3db5e 2710 UDP_TUNNEL_TYPE_VXLAN);
9c2e24e1 2711 spin_unlock(&vn->sock_lock);
553675fb 2712
2713 /* Mark socket as an encapsulation socket. */
5602c48c 2714 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
acbf74a7
AZ		 2715 tunnel_cfg.sk_user_data = vs;
2716 tunnel_cfg.encap_type = 1;
f2d1968e 2717 tunnel_cfg.encap_rcv = vxlan_rcv;
acbf74a7 2718 tunnel_cfg.encap_destroy = NULL;
5602c48c
TH		 2719 tunnel_cfg.gro_receive = vxlan_gro_receive;
2720 tunnel_cfg.gro_complete = vxlan_gro_complete;
acbf74a7
AZ		 2721
2722 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
e4c7ed41 2723
9c2e24e1
PS		 2724 return vs;
2725}
2726
b1be00a6 2727static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6)
9c2e24e1 2728{
205f356d
JB		 2729 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2730 struct vxlan_sock *vs = NULL;
9c2e24e1 2731
205f356d 2732 if (!vxlan->cfg.no_share) {
56ef9c90 2733 spin_lock(&vn->sock_lock);
205f356d
JB		 2734 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
2735 vxlan->cfg.dst_port, vxlan->flags);
2736 if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) {
56ef9c90 2737 spin_unlock(&vn->sock_lock);
205f356d 2738 return -EBUSY;
56ef9c90
MRL		 2739 }
2740 spin_unlock(&vn->sock_lock);
2741 }
205f356d 2742 if (!vs)
b1be00a6
JB		 2743 vs = vxlan_socket_create(vxlan->net, ipv6,
2744 vxlan->cfg.dst_port, vxlan->flags);
205f356d
JB		 2745 if (IS_ERR(vs))
2746 return PTR_ERR(vs);
b1be00a6
JB		 2747#if IS_ENABLED(CONFIG_IPV6)
2748 if (ipv6)
c6fcc4fc 2749 rcu_assign_pointer(vxlan->vn6_sock, vs);
b1be00a6
JB		 2750 else
2751#endif
c6fcc4fc 2752 rcu_assign_pointer(vxlan->vn4_sock, vs);
205f356d
JB		 2753 vxlan_vs_add_dev(vs, vxlan);
2754 return 0;
553675fb 2755}
2756
b1be00a6
JB		 2757static int vxlan_sock_add(struct vxlan_dev *vxlan)
2758{
2759 bool ipv6 = vxlan->flags & VXLAN_F_IPV6;
2760 bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA;
2761 int ret = 0;
2762
c6fcc4fc 2763 RCU_INIT_POINTER(vxlan->vn4_sock, NULL);
b1be00a6 2764#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 2765 RCU_INIT_POINTER(vxlan->vn6_sock, NULL);
b1be00a6
JB		 2766 if (ipv6 || metadata)
2767 ret = __vxlan_sock_add(vxlan, true);
2768#endif
2769 if (!ret && (!ipv6 || metadata))
2770 ret = __vxlan_sock_add(vxlan, false);
2771 if (ret < 0)
2772 vxlan_sock_release(vxlan);
2773 return ret;
2774}
2775
0dfbdf41
TG		 2776static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
2777 struct vxlan_config *conf)
d342894c 2778{
33564bbb 2779 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
07b9b37c 2780 struct vxlan_dev *vxlan = netdev_priv(dev), *tmp;
c7995c43 2781 struct vxlan_rdst *dst = &vxlan->default_dst;
b1be00a6 2782 unsigned short needed_headroom = ETH_HLEN;
d342894c 2783 int err;
e4c7ed41 2784 bool use_ipv6 = false;
0dfbdf41 2785 __be16 default_port = vxlan->cfg.dst_port;
7e059158 2786 struct net_device *lowerdev = NULL;
d342894c 2787
e1e5314d 2788 if (conf->flags & VXLAN_F_GPE) {
e1e5314d
JB		 2789 /* For now, allow GPE only together with COLLECT_METADATA.
2790 * This can be relaxed later; in such case, the other side
2791 * of the PtP link will have to be provided.
2792 */
3555621d
JB		 2793 if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) ||
2794 !(conf->flags & VXLAN_F_COLLECT_METADATA)) {
2795 pr_info("unsupported combination of extensions\n");
e1e5314d 2796 return -EINVAL;
3555621d 2797 }
e1e5314d
JB		 2798
2799 vxlan_raw_setup(dev);
2800 } else {
2801 vxlan_ether_setup(dev);
2802 }
0c867c9b 2803
91572088
JW		 2804 /* MTU range: 68 - 65535 */
2805 dev->min_mtu = ETH_MIN_MTU;
2806 dev->max_mtu = ETH_MAX_MTU;
2807
33564bbb 2808 vxlan->net = src_net;
f01ec1c0 2809
0dfbdf41 2810 dst->remote_vni = conf->vni;
d342894c 2811
0dfbdf41 2812 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
d342894c 2813
0dfbdf41
TG		 2814 /* Unless IPv6 is explicitly requested, assume IPv4 */
2815 if (!dst->remote_ip.sa.sa_family)
2816 dst->remote_ip.sa.sa_family = AF_INET;
e4c7ed41 2817
0dfbdf41 2818 if (dst->remote_ip.sa.sa_family == AF_INET6 ||
057ba29b
JB		 2819 vxlan->cfg.saddr.sa.sa_family == AF_INET6) {
2820 if (!IS_ENABLED(CONFIG_IPV6))
2821 return -EPFNOSUPPORT;
e4c7ed41 2822 use_ipv6 = true;
b1be00a6 2823 vxlan->flags |= VXLAN_F_IPV6;
057ba29b 2824 }
d342894c 2825
e7f70af1
DB		 2826 if (conf->label && !use_ipv6) {
2827 pr_info("label only supported in use with IPv6\n");
2828 return -EINVAL;
2829 }
2830
0dfbdf41 2831 if (conf->remote_ifindex) {
7e059158 2832 lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex);
0dfbdf41 2833 dst->remote_ifindex = conf->remote_ifindex;
34e02aa1 2834
2835 if (!lowerdev) {
c7995c43 2836 pr_info("ifindex %d does not exist\n", dst->remote_ifindex);
34e02aa1 2837 return -ENODEV;
2838 }
d342894c 2839
e4c7ed41
CW		 2840#if IS_ENABLED(CONFIG_IPV6)
2841 if (use_ipv6) {
2842 struct inet6_dev *idev = __in6_dev_get(lowerdev);
2843 if (idev && idev->cnf.disable_ipv6) {
2844 pr_info("IPv6 is disabled via sysctl\n");
2845 return -EPERM;
2846 }
e4c7ed41
CW		 2847 }
2848#endif
2849
0dfbdf41 2850 if (!conf->mtu)
91572088
JW		 2851 dev->mtu = lowerdev->mtu -
2852 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
1ba56fb4 2853
b1be00a6 2854 needed_headroom = lowerdev->hard_header_len;
9b4cdd51
JB		 2855 } else if (vxlan_addr_multicast(&dst->remote_ip)) {
2856 pr_info("multicast destination requires interface to be specified\n");
2857 return -EINVAL;
9dc2ad10 2858 }
d342894c 2859
7e059158 2860 if (conf->mtu) {
91572088
JW		 2861 int max_mtu = ETH_MAX_MTU;
2862
2863 if (lowerdev)
2864 max_mtu = lowerdev->mtu;
2865
2866 max_mtu -= (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
2867
2868 if (conf->mtu < dev->min_mtu || conf->mtu > dev->max_mtu)
2869 return -EINVAL;
2870
2871 dev->mtu = conf->mtu;
2872
2873 if (conf->mtu > max_mtu)
2874 dev->mtu = max_mtu;
7e059158
DW		 2875 }
2876
b1be00a6
JB		 2877 if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
2878 needed_headroom += VXLAN6_HEADROOM;
2879 else
2880 needed_headroom += VXLAN_HEADROOM;
2881 dev->needed_headroom = needed_headroom;
2882
0dfbdf41 2883 memcpy(&vxlan->cfg, conf, sizeof(*conf));
e1e5314d
JB		 2884 if (!vxlan->cfg.dst_port) {
2885 if (conf->flags & VXLAN_F_GPE)
2886 vxlan->cfg.dst_port = 4790; /* IANA assigned VXLAN-GPE port */
2887 else
2888 vxlan->cfg.dst_port = default_port;
2889 }
0dfbdf41
TG		 2890 vxlan->flags |= conf->flags;
2891
2892 if (!vxlan->cfg.age_interval)
2893 vxlan->cfg.age_interval = FDB_AGE_DEFAULT;
2894
07b9b37c
ND		 2895 list_for_each_entry(tmp, &vn->vxlan_list, next) {
2896 if (tmp->cfg.vni == conf->vni &&
2897 (tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 ||
2898 tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 &&
2899 tmp->cfg.dst_port == vxlan->cfg.dst_port &&
2900 (tmp->flags & VXLAN_F_RCV_FLAGS) ==
3555621d
JB		 2901 (vxlan->flags & VXLAN_F_RCV_FLAGS)) {
2902 pr_info("duplicate VNI %u\n", be32_to_cpu(conf->vni));
2903 return -EEXIST;
2904 }
07b9b37c 2905 }
0dfbdf41
TG		 2906
2907 dev->ethtool_ops = &vxlan_ethtool_ops;
2908
2909 /* create an fdb entry for a valid default destination */
2910 if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
2911 err = vxlan_fdb_create(vxlan, all_zeros_mac,
2912 &vxlan->default_dst.remote_ip,
2913 NUD_REACHABLE|NUD_PERMANENT,
2914 NLM_F_EXCL|NLM_F_CREATE,
2915 vxlan->cfg.dst_port,
2916 vxlan->default_dst.remote_vni,
2917 vxlan->default_dst.remote_ifindex,
2918 NTF_SELF);
2919 if (err)
2920 return err;
2921 }
2922
2923 err = register_netdevice(dev);
2924 if (err) {
2925 vxlan_fdb_delete_default(vxlan);
2926 return err;
2927 }
2928
2929 list_add(&vxlan->next, &vn->vxlan_list);
2930
2931 return 0;
2932}
2933
0dfbdf41
TG		 2934static int vxlan_newlink(struct net *src_net, struct net_device *dev,
2935 struct nlattr *tb[], struct nlattr *data[])
2936{
2937 struct vxlan_config conf;
0dfbdf41 2938
0dfbdf41 2939 memset(&conf, 0, sizeof(conf));
e277de5f
JG		 2940
2941 if (data[IFLA_VXLAN_ID])
54bfd872 2942 conf.vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
0dfbdf41
TG		 2943
2944 if (data[IFLA_VXLAN_GROUP]) {
2945 conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
2946 } else if (data[IFLA_VXLAN_GROUP6]) {
2947 if (!IS_ENABLED(CONFIG_IPV6))
2948 return -EPFNOSUPPORT;
2949
2950 conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
2951 conf.remote_ip.sa.sa_family = AF_INET6;
2952 }
2953
2954 if (data[IFLA_VXLAN_LOCAL]) {
2955 conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
2956 conf.saddr.sa.sa_family = AF_INET;
2957 } else if (data[IFLA_VXLAN_LOCAL6]) {
2958 if (!IS_ENABLED(CONFIG_IPV6))
2959 return -EPFNOSUPPORT;
2960
2961 /* TODO: respect scope id */
2962 conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
2963 conf.saddr.sa.sa_family = AF_INET6;
2964 }
2965
2966 if (data[IFLA_VXLAN_LINK])
2967 conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
2968
d342894c 2969 if (data[IFLA_VXLAN_TOS])
0dfbdf41 2970 conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
d342894c 2971
afb97186 2972 if (data[IFLA_VXLAN_TTL])
0dfbdf41 2973 conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
afb97186 2974
e7f70af1
DB		 2975 if (data[IFLA_VXLAN_LABEL])
2976 conf.label = nla_get_be32(data[IFLA_VXLAN_LABEL]) &
2977 IPV6_FLOWLABEL_MASK;
2978
d342894c 2979 if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING]))
0dfbdf41 2980 conf.flags |= VXLAN_F_LEARN;
d342894c 2981
2982 if (data[IFLA_VXLAN_AGEING])
0dfbdf41 2983 conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
d342894c 2984
e4f67add 2985 if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY]))
0dfbdf41 2986 conf.flags |= VXLAN_F_PROXY;
e4f67add
DS		 2987
2988 if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC]))
0dfbdf41 2989 conf.flags |= VXLAN_F_RSC;
e4f67add
DS		 2990
2991 if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS]))
0dfbdf41 2992 conf.flags |= VXLAN_F_L2MISS;
e4f67add
DS		 2993
2994 if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS]))
0dfbdf41 2995 conf.flags |= VXLAN_F_L3MISS;
e4f67add 2996
d342894c 2997 if (data[IFLA_VXLAN_LIMIT])
0dfbdf41 2998 conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
d342894c 2999
f8a9b1bc
AS		 3000 if (data[IFLA_VXLAN_COLLECT_METADATA] &&
3001 nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
3002 conf.flags |= VXLAN_F_COLLECT_METADATA;
3003
05f47d69 3004 if (data[IFLA_VXLAN_PORT_RANGE]) {
3005 const struct ifla_vxlan_port_range *p
3006 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
0dfbdf41
TG		 3007 conf.port_min = ntohs(p->low);
3008 conf.port_max = ntohs(p->high);
05f47d69 3009 }
3010
823aa873 3011 if (data[IFLA_VXLAN_PORT])
0dfbdf41 3012 conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
823aa873 3013
6ceb31ca
AD		 3014 if (data[IFLA_VXLAN_UDP_CSUM] &&
3015 !nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
3016 conf.flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
359a0ea9
TH		 3017
3018 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
3019 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
0dfbdf41 3020 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX;
359a0ea9
TH		 3021
3022 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
3023 nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
0dfbdf41 3024 conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX;
359a0ea9 3025
dfd8645e
TH		 3026 if (data[IFLA_VXLAN_REMCSUM_TX] &&
3027 nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX]))
0dfbdf41 3028 conf.flags |= VXLAN_F_REMCSUM_TX;
dfd8645e
TH		 3029
3030 if (data[IFLA_VXLAN_REMCSUM_RX] &&
3031 nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX]))
0dfbdf41 3032 conf.flags |= VXLAN_F_REMCSUM_RX;
dfd8645e 3033
3511494c 3034 if (data[IFLA_VXLAN_GBP])
0dfbdf41 3035 conf.flags |= VXLAN_F_GBP;
3511494c 3036
e1e5314d
JB		 3037 if (data[IFLA_VXLAN_GPE])
3038 conf.flags |= VXLAN_F_GPE;
3039
0ace2ca8 3040 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
0dfbdf41 3041 conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL;
0ace2ca8 3042
ce577668
CH		 3043 if (tb[IFLA_MTU])
3044 conf.mtu = nla_get_u32(tb[IFLA_MTU]);
3045
3555621d 3046 return vxlan_dev_configure(src_net, dev, &conf);
d342894c 3047}
3048
3049static void vxlan_dellink(struct net_device *dev, struct list_head *head)
3050{
3051 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 3052 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
d342894c 3053
fe5c3561 3054 spin_lock(&vn->sock_lock);
9c2e24e1
PS		 3055 if (!hlist_unhashed(&vxlan->hlist))
3056 hlist_del_rcu(&vxlan->hlist);
fe5c3561 3057 spin_unlock(&vn->sock_lock);
3058
58ce31cc 3059 gro_cells_destroy(&vxlan->gro_cells);
553675fb 3060 list_del(&vxlan->next);
d342894c 3061 unregister_netdevice_queue(dev, head);
3062}
3063
3064static size_t vxlan_get_size(const struct net_device *dev)
3065{
3066
3067 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
e4c7ed41 3068 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
d342894c 3069 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
e4c7ed41 3070 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
d342894c 3071 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
3072 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
e7f70af1 3073 nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */
d342894c 3074 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
e4f67add
DS		 3075 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
3076 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
3077 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
3078 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
da8b43c0 3079 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
d342894c 3080 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
3081 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
05f47d69 3082 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
359a0ea9
TH		 3083 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
3084 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
3085 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
3086 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
dfd8645e
TH		 3087 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
3088 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
d342894c 3089 0;
3090}
3091
3092static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
3093{
3094 const struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 3095 const struct vxlan_rdst *dst = &vxlan->default_dst;
05f47d69 3096 struct ifla_vxlan_port_range ports = {
0dfbdf41
TG		 3097 .low = htons(vxlan->cfg.port_min),
3098 .high = htons(vxlan->cfg.port_max),
05f47d69 3099 };
d342894c 3100
54bfd872 3101 if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni)))
d342894c 3102 goto nla_put_failure;
3103
e4c7ed41
CW		 3104 if (!vxlan_addr_any(&dst->remote_ip)) {
3105 if (dst->remote_ip.sa.sa_family == AF_INET) {
930345ea
JB		 3106 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
3107 dst->remote_ip.sin.sin_addr.s_addr))
e4c7ed41
CW		 3108 goto nla_put_failure;
3109#if IS_ENABLED(CONFIG_IPV6)
3110 } else {
930345ea
JB		 3111 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
3112 &dst->remote_ip.sin6.sin6_addr))
e4c7ed41
CW		 3113 goto nla_put_failure;
3114#endif
3115 }
3116 }
d342894c 3117
c7995c43 3118 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
d342894c 3119 goto nla_put_failure;
3120
0dfbdf41
TG		 3121 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
3122 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
930345ea 3123 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
0dfbdf41 3124 vxlan->cfg.saddr.sin.sin_addr.s_addr))
e4c7ed41
CW		 3125 goto nla_put_failure;
3126#if IS_ENABLED(CONFIG_IPV6)
3127 } else {
930345ea 3128 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
0dfbdf41 3129 &vxlan->cfg.saddr.sin6.sin6_addr))
e4c7ed41
CW		 3130 goto nla_put_failure;
3131#endif
3132 }
3133 }
d342894c 3134
0dfbdf41
TG		 3135 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
3136 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
e7f70af1 3137 nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) ||
e4f67add
DS		 3138 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
3139 !!(vxlan->flags & VXLAN_F_LEARN)) ||
3140 nla_put_u8(skb, IFLA_VXLAN_PROXY,
3141 !!(vxlan->flags & VXLAN_F_PROXY)) ||
3142 nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) ||
3143 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
3144 !!(vxlan->flags & VXLAN_F_L2MISS)) ||
3145 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
3146 !!(vxlan->flags & VXLAN_F_L3MISS)) ||
da8b43c0
AS		 3147 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
3148 !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) ||
0dfbdf41
TG		 3149 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
3150 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
3151 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
359a0ea9 3152 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
6ceb31ca 3153 !(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM_TX)) ||
359a0ea9
TH		 3154 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
3155 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
3156 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
dfd8645e
TH		 3157 !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
3158 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
3159 !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) ||
3160 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
3161 !!(vxlan->flags & VXLAN_F_REMCSUM_RX)))
d342894c 3162 goto nla_put_failure;
3163
05f47d69 3164 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
3165 goto nla_put_failure;
3166
3511494c
TG		 3167 if (vxlan->flags & VXLAN_F_GBP &&
3168 nla_put_flag(skb, IFLA_VXLAN_GBP))
3169 goto nla_put_failure;
3170
e1e5314d
JB		 3171 if (vxlan->flags & VXLAN_F_GPE &&
3172 nla_put_flag(skb, IFLA_VXLAN_GPE))
3173 goto nla_put_failure;
3174
0ace2ca8
TH		 3175 if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL &&
3176 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
3177 goto nla_put_failure;
3178
d342894c 3179 return 0;
3180
3181nla_put_failure:
3182 return -EMSGSIZE;
3183}
3184
1728d4fa
ND		 3185static struct net *vxlan_get_link_net(const struct net_device *dev)
3186{
3187 struct vxlan_dev *vxlan = netdev_priv(dev);
3188
3189 return vxlan->net;
3190}
3191
d342894c 3192static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
3193 .kind = "vxlan",
3194 .maxtype = IFLA_VXLAN_MAX,
3195 .policy = vxlan_policy,
3196 .priv_size = sizeof(struct vxlan_dev),
3197 .setup = vxlan_setup,
3198 .validate = vxlan_validate,
3199 .newlink = vxlan_newlink,
3200 .dellink = vxlan_dellink,
3201 .get_size = vxlan_get_size,
3202 .fill_info = vxlan_fill_info,
1728d4fa 3203 .get_link_net = vxlan_get_link_net,
d342894c 3204};
3205
cf5da330
ND		 3206struct net_device *vxlan_dev_create(struct net *net, const char *name,
3207 u8 name_assign_type,
3208 struct vxlan_config *conf)
3209{
3210 struct nlattr *tb[IFLA_MAX + 1];
3211 struct net_device *dev;
3212 int err;
3213
3214 memset(&tb, 0, sizeof(tb));
3215
3216 dev = rtnl_create_link(net, name, name_assign_type,
3217 &vxlan_link_ops, tb);
3218 if (IS_ERR(dev))
3219 return dev;
3220
3221 err = vxlan_dev_configure(net, dev, conf);
3222 if (err < 0) {
3223 free_netdev(dev);
3224 return ERR_PTR(err);
3225 }
3226
3227 err = rtnl_configure_link(dev, NULL);
3228 if (err < 0) {
3229 LIST_HEAD(list_kill);
3230
3231 vxlan_dellink(dev, &list_kill);
3232 unregister_netdevice_many(&list_kill);
3233 return ERR_PTR(err);
3234 }
3235
3236 return dev;
3237}
3238EXPORT_SYMBOL_GPL(vxlan_dev_create);
3239
acaf4e70
DB		 3240static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
3241 struct net_device *dev)
3242{
3243 struct vxlan_dev *vxlan, *next;
3244 LIST_HEAD(list_kill);
3245
3246 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3247 struct vxlan_rdst *dst = &vxlan->default_dst;
3248
3249 /* In case we created vxlan device with carrier
3250 * and we loose the carrier due to module unload
3251 * we also need to remove vxlan device. In other
3252 * cases, it's not necessary and remote_ifindex
3253 * is 0 here, so no matches.
3254 */
3255 if (dst->remote_ifindex == dev->ifindex)
3256 vxlan_dellink(vxlan->dev, &list_kill);
3257 }
3258
3259 unregister_netdevice_many(&list_kill);
3260}
3261
b7aade15
HFS		 3262static int vxlan_netdevice_event(struct notifier_block *unused,
3263 unsigned long event, void *ptr)
acaf4e70
DB		 3264{
3265 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
783c1463 3266 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
acaf4e70 3267
783c1463 3268 if (event == NETDEV_UNREGISTER)
acaf4e70 3269 vxlan_handle_lowerdev_unregister(vn, dev);
7c46a640 3270 else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO)
b7aade15 3271 vxlan_push_rx_ports(dev);
acaf4e70
DB		 3272
3273 return NOTIFY_DONE;
3274}
3275
3276static struct notifier_block vxlan_notifier_block __read_mostly = {
b7aade15 3277 .notifier_call = vxlan_netdevice_event,
acaf4e70
DB		 3278};
3279
d342894c 3280static __net_init int vxlan_init_net(struct net *net)
3281{
3282 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
31fec5aa 3283 unsigned int h;
d342894c 3284
553675fb 3285 INIT_LIST_HEAD(&vn->vxlan_list);
1c51a915 3286 spin_lock_init(&vn->sock_lock);
d342894c 3287
553675fb 3288 for (h = 0; h < PORT_HASH_SIZE; ++h)
3289 INIT_HLIST_HEAD(&vn->sock_list[h]);
d342894c 3290
3291 return 0;
3292}
3293
f01ec1c0
ND		 3294static void __net_exit vxlan_exit_net(struct net *net)
3295{
3296 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3297 struct vxlan_dev *vxlan, *next;
3298 struct net_device *dev, *aux;
3299 LIST_HEAD(list);
3300
3301 rtnl_lock();
3302 for_each_netdev_safe(net, dev, aux)
3303 if (dev->rtnl_link_ops == &vxlan_link_ops)
3304 unregister_netdevice_queue(dev, &list);
3305
3306 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
3307 /* If vxlan->dev is in the same netns, it has already been added
3308 * to the list by the previous loop.
3309 */
58ce31cc
TH		 3310 if (!net_eq(dev_net(vxlan->dev), net)) {
3311 gro_cells_destroy(&vxlan->gro_cells);
13c3ed6a 3312 unregister_netdevice_queue(vxlan->dev, &list);
58ce31cc 3313 }
f01ec1c0
ND		 3314 }
3315
3316 unregister_netdevice_many(&list);
3317 rtnl_unlock();
3318}
3319
d342894c 3320static struct pernet_operations vxlan_net_ops = {
3321 .init = vxlan_init_net,
f01ec1c0 3322 .exit = vxlan_exit_net,
d342894c 3323 .id = &vxlan_net_id,
3324 .size = sizeof(struct vxlan_net),
3325};
3326
3327static int __init vxlan_init_module(void)
3328{
3329 int rc;
3330
3331 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
3332
783c1463 3333 rc = register_pernet_subsys(&vxlan_net_ops);
d342894c 3334 if (rc)
3335 goto out1;
3336
acaf4e70 3337 rc = register_netdevice_notifier(&vxlan_notifier_block);
d342894c 3338 if (rc)
3339 goto out2;
3340
acaf4e70
DB		 3341 rc = rtnl_link_register(&vxlan_link_ops);
3342 if (rc)
3343 goto out3;
d342894c 3344
acaf4e70
DB		 3345 return 0;
3346out3:
3347 unregister_netdevice_notifier(&vxlan_notifier_block);
d342894c 3348out2:
783c1463 3349 unregister_pernet_subsys(&vxlan_net_ops);
d342894c 3350out1:
3351 return rc;
3352}
7332a13b 3353late_initcall(vxlan_init_module);
d342894c 3354
3355static void __exit vxlan_cleanup_module(void)
3356{
b7153984 3357 rtnl_link_unregister(&vxlan_link_ops);
acaf4e70 3358 unregister_netdevice_notifier(&vxlan_notifier_block);
783c1463
DB		 3359 unregister_pernet_subsys(&vxlan_net_ops);
3360 /* rcu_barrier() is called by netns */
d342894c 3361}
3362module_exit(vxlan_cleanup_module);
3363
3364MODULE_LICENSE("GPL");
3365MODULE_VERSION(VXLAN_VERSION);
3b8df3c6 3366MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
ead5139a 3367MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
d342894c 3368MODULE_ALIAS_RTNL_LINK("vxlan");
Linux 6.x block layer and io_uring tree(s)