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qed: fix spelling mistake "queuess" -> "queues"
[mirror_ubuntu-jammy-kernel.git] / drivers / net / vxlan.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
d342894c 2/*
eb5ce439 3 * VXLAN: Virtual eXtensible Local Area Network
d342894c 4 *
3b8df3c6 5 * Copyright (c) 2012-2013 Vyatta Inc.
d342894c 6 */
7
8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10#include <linux/kernel.h>
d342894c 11#include <linux/module.h>
12#include <linux/errno.h>
13#include <linux/slab.h>
d342894c 14#include <linux/udp.h>
15#include <linux/igmp.h>
d342894c 16#include <linux/if_ether.h>
1b13c97f 17#include <linux/ethtool.h>
e4f67add
DS		 18#include <net/arp.h>
19#include <net/ndisc.h>
3616d08b 20#include <net/ipv6_stubs.h>
d342894c 21#include <net/ip.h>
22#include <net/icmp.h>
d342894c 23#include <net/rtnetlink.h>
d342894c 24#include <net/inet_ecn.h>
25#include <net/net_namespace.h>
26#include <net/netns/generic.h>
fa20e0e3 27#include <net/tun_proto.h>
012a5729 28#include <net/vxlan.h>
40d29af0 29
e4c7ed41 30#if IS_ENABLED(CONFIG_IPV6)
e4c7ed41 31#include <net/ip6_tunnel.h>
660d98ca 32#include <net/ip6_checksum.h>
e4c7ed41 33#endif
d342894c 34
35#define VXLAN_VERSION "0.1"
36
553675fb 37#define PORT_HASH_BITS 8
38#define PORT_HASH_SIZE (1<<PORT_HASH_BITS)
d342894c 39#define FDB_AGE_DEFAULT 300 /* 5 min */
40#define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */
41
23c578bf 42/* UDP port for VXLAN traffic.
43 * The IANA assigned port is 4789, but the Linux default is 8472
234f5b73 44 * for compatibility with early adopters.
23c578bf 45 */
9daaa397
SH		 46static unsigned short vxlan_port __read_mostly = 8472;
47module_param_named(udp_port, vxlan_port, ushort, 0444);
d342894c 48MODULE_PARM_DESC(udp_port, "Destination UDP port");
49
50static bool log_ecn_error = true;
51module_param(log_ecn_error, bool, 0644);
52MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
53
c7d03a00 54static unsigned int vxlan_net_id;
0dfbdf41 55static struct rtnl_link_ops vxlan_link_ops;
553675fb 56
7256eac1 57static const u8 all_zeros_mac[ETH_ALEN + 2];
afbd8bae 58
205f356d 59static int vxlan_sock_add(struct vxlan_dev *vxlan);
614732ea 60
a53cb29b
MB		 61static void vxlan_vs_del_dev(struct vxlan_dev *vxlan);
62
553675fb 63/* per-network namespace private data for this module */
64struct vxlan_net {
65 struct list_head vxlan_list;
66 struct hlist_head sock_list[PORT_HASH_SIZE];
1c51a915 67 spinlock_t sock_lock;
553675fb 68};
69
d342894c 70/* Forwarding table entry */
71struct vxlan_fdb {
72 struct hlist_node hlist; /* linked list of entries */
73 struct rcu_head rcu;
74 unsigned long updated; /* jiffies */
75 unsigned long used;
3e61aa8f 76 struct list_head remotes;
7177a3b0 77 u8 eth_addr[ETH_ALEN];
d342894c 78 u16 state; /* see ndm_state */
3ad7a4b1 79 __be32 vni;
45598c1c 80 u16 flags; /* see ndm_flags and below */
d342894c 81};
82
45598c1c
PM		 83#define NTF_VXLAN_ADDED_BY_USER 0x100
84
d342894c 85/* salt for hash table */
86static u32 vxlan_salt __read_mostly;
87
ee122c79
TG		 88static inline bool vxlan_collect_metadata(struct vxlan_sock *vs)
89{
e7030878
TG		 90 return vs->flags & VXLAN_F_COLLECT_METADATA ||
91 ip_tunnel_collect_metadata();
ee122c79
TG		 92}
93
e4c7ed41
CW		 94#if IS_ENABLED(CONFIG_IPV6)
95static inline
96bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
97{
f0ef3126
JB		 98 if (a->sa.sa_family != b->sa.sa_family)
99 return false;
100 if (a->sa.sa_family == AF_INET6)
101 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
102 else
103 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 104}
105
e4c7ed41
CW		 106static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
107{
f0ef3126 108 if (nla_len(nla) >= sizeof(struct in6_addr)) {
67b61f6c 109 ip->sin6.sin6_addr = nla_get_in6_addr(nla);
f0ef3126
JB		 110 ip->sa.sa_family = AF_INET6;
111 return 0;
112 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 113 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 114 ip->sa.sa_family = AF_INET;
115 return 0;
116 } else {
117 return -EAFNOSUPPORT;
118 }
e4c7ed41
CW		 119}
120
121static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 122 const union vxlan_addr *ip)
e4c7ed41 123{
f0ef3126 124 if (ip->sa.sa_family == AF_INET6)
930345ea 125 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
f0ef3126 126 else
930345ea 127 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 128}
129
130#else /* !CONFIG_IPV6 */
131
132static inline
133bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
134{
f0ef3126 135 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
e4c7ed41
CW		 136}
137
e4c7ed41
CW		 138static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla)
139{
f0ef3126
JB		 140 if (nla_len(nla) >= sizeof(struct in6_addr)) {
141 return -EAFNOSUPPORT;
142 } else if (nla_len(nla) >= sizeof(__be32)) {
67b61f6c 143 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
f0ef3126
JB		 144 ip->sa.sa_family = AF_INET;
145 return 0;
146 } else {
147 return -EAFNOSUPPORT;
148 }
e4c7ed41
CW		 149}
150
151static int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
f0ef3126 152 const union vxlan_addr *ip)
e4c7ed41 153{
930345ea 154 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
e4c7ed41
CW		 155}
156#endif
157
553675fb 158/* Virtual Network hash table head */
54bfd872 159static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni)
553675fb 160{
54bfd872 161 return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)];
553675fb 162}
163
164/* Socket hash table head */
165static inline struct hlist_head *vs_head(struct net *net, __be16 port)
d342894c 166{
167 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
168
553675fb 169 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
170}
171
3e61aa8f
SH		 172/* First remote destination for a forwarding entry.
173 * Guaranteed to be non-NULL because remotes are never deleted.
174 */
5ca5461c 175static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
3e61aa8f 176{
5ca5461c 177 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
178}
179
180static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
181{
182 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
3e61aa8f
SH		 183}
184
ac5132d1
TG		 185/* Find VXLAN socket based on network namespace, address family and UDP port
186 * and enabled unshareable flags.
187 */
188static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family,
aab8cc36 189 __be16 port, u32 flags, int ifindex)
553675fb 190{
191 struct vxlan_sock *vs;
af33c1ad
TH		 192
193 flags &= VXLAN_F_RCV_FLAGS;
553675fb 194
195 hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) {
19ca9fc1 196 if (inet_sk(vs->sock->sk)->inet_sport == port &&
705cc62f 197 vxlan_get_sk_family(vs) == family &&
aab8cc36
AB		 198 vs->flags == flags &&
199 vs->sock->sk->sk_bound_dev_if == ifindex)
553675fb 200 return vs;
201 }
202 return NULL;
d342894c 203}
204
49f810f0
MS		 205static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, int ifindex,
206 __be32 vni)
d342894c 207{
69e76661 208 struct vxlan_dev_node *node;
d342894c 209
b9167b2e
JB		 210 /* For flow based devices, map all packets to VNI 0 */
211 if (vs->flags & VXLAN_F_COLLECT_METADATA)
212 vni = 0;
213
69e76661
JB		 214 hlist_for_each_entry_rcu(node, vni_head(vs, vni), hlist) {
215 if (node->vxlan->default_dst.remote_vni != vni)
49f810f0
MS		 216 continue;
217
218 if (IS_ENABLED(CONFIG_IPV6)) {
69e76661 219 const struct vxlan_config *cfg = &node->vxlan->cfg;
49f810f0
MS		 220
221 if ((cfg->flags & VXLAN_F_IPV6_LINKLOCAL) &&
222 cfg->remote_ifindex != ifindex)
223 continue;
224 }
225
69e76661 226 return node->vxlan;
d342894c 227 }
228
229 return NULL;
230}
231
5cfccc5a 232/* Look up VNI in a per net namespace table */
49f810f0
MS		 233static struct vxlan_dev *vxlan_find_vni(struct net *net, int ifindex,
234 __be32 vni, sa_family_t family,
235 __be16 port, u32 flags)
5cfccc5a
PS		 236{
237 struct vxlan_sock *vs;
238
aab8cc36 239 vs = vxlan_find_sock(net, family, port, flags, ifindex);
5cfccc5a
PS		 240 if (!vs)
241 return NULL;
242
49f810f0 243 return vxlan_vs_find_vni(vs, ifindex, vni);
5cfccc5a
PS		 244}
245
d342894c 246/* Fill in neighbour message in skbuff. */
247static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
234f5b73
SH		 248 const struct vxlan_fdb *fdb,
249 u32 portid, u32 seq, int type, unsigned int flags,
250 const struct vxlan_rdst *rdst)
d342894c 251{
252 unsigned long now = jiffies;
253 struct nda_cacheinfo ci;
254 struct nlmsghdr *nlh;
255 struct ndmsg *ndm;
e4f67add 256 bool send_ip, send_eth;
d342894c 257
258 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
259 if (nlh == NULL)
260 return -EMSGSIZE;
261
262 ndm = nlmsg_data(nlh);
263 memset(ndm, 0, sizeof(*ndm));
e4f67add
DS		 264
265 send_eth = send_ip = true;
266
267 if (type == RTM_GETNEIGH) {
e4c7ed41 268 send_ip = !vxlan_addr_any(&rdst->remote_ip);
e4f67add 269 send_eth = !is_zero_ether_addr(fdb->eth_addr);
8f48ba71 270 ndm->ndm_family = send_ip ? rdst->remote_ip.sa.sa_family : AF_INET;
e4f67add
DS		 271 } else
272 ndm->ndm_family = AF_BRIDGE;
d342894c 273 ndm->ndm_state = fdb->state;
274 ndm->ndm_ifindex = vxlan->dev->ifindex;
ae884082 275 ndm->ndm_flags = fdb->flags;
0efe1173
PM		 276 if (rdst->offloaded)
277 ndm->ndm_flags |= NTF_OFFLOADED;
545469f7 278 ndm->ndm_type = RTN_UNICAST;
d342894c 279
193523bf 280 if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
4967082b 281 nla_put_s32(skb, NDA_LINK_NETNSID,
38f507f1 282 peernet2id(dev_net(vxlan->dev), vxlan->net)))
193523bf
ND		 283 goto nla_put_failure;
284
e4f67add 285 if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))
d342894c 286 goto nla_put_failure;
287
e4c7ed41 288 if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip))
6681712d
DS		 289 goto nla_put_failure;
290
0dfbdf41 291 if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port &&
6681712d
DS		 292 nla_put_be16(skb, NDA_PORT, rdst->remote_port))
293 goto nla_put_failure;
c7995c43 294 if (rdst->remote_vni != vxlan->default_dst.remote_vni &&
54bfd872 295 nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni)))
6681712d 296 goto nla_put_failure;
dc5321d7 297 if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && fdb->vni &&
3ad7a4b1
RP		 298 nla_put_u32(skb, NDA_SRC_VNI,
299 be32_to_cpu(fdb->vni)))
300 goto nla_put_failure;
6681712d
DS		 301 if (rdst->remote_ifindex &&
302 nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex))
d342894c 303 goto nla_put_failure;
304
305 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
306 ci.ndm_confirmed = 0;
307 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
308 ci.ndm_refcnt = 0;
309
310 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
311 goto nla_put_failure;
312
053c095a
JB		 313 nlmsg_end(skb, nlh);
314 return 0;
d342894c 315
316nla_put_failure:
317 nlmsg_cancel(skb, nlh);
318 return -EMSGSIZE;
319}
320
321static inline size_t vxlan_nlmsg_size(void)
322{
323 return NLMSG_ALIGN(sizeof(struct ndmsg))
324 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
e4c7ed41 325 + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */
73cf3317 326 + nla_total_size(sizeof(__be16)) /* NDA_PORT */
6681712d
DS		 327 + nla_total_size(sizeof(__be32)) /* NDA_VNI */
328 + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */
4967082b 329 + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */
d342894c 330 + nla_total_size(sizeof(struct nda_cacheinfo));
331}
332
9a997353
PM		 333static void __vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
334 struct vxlan_rdst *rd, int type)
d342894c 335{
336 struct net *net = dev_net(vxlan->dev);
337 struct sk_buff *skb;
338 int err = -ENOBUFS;
339
340 skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC);
341 if (skb == NULL)
342 goto errout;
343
9e4b93f9 344 err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd);
d342894c 345 if (err < 0) {
346 /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
347 WARN_ON(err == -EMSGSIZE);
348 kfree_skb(skb);
349 goto errout;
350 }
351
352 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
353 return;
354errout:
355 if (err < 0)
356 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
357}
358
ff23b91c
PM		 359static void vxlan_fdb_switchdev_notifier_info(const struct vxlan_dev *vxlan,
360 const struct vxlan_fdb *fdb,
361 const struct vxlan_rdst *rd,
4c59b7d1 362 struct netlink_ext_ack *extack,
ff23b91c
PM		 363 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
364{
365 fdb_info->info.dev = vxlan->dev;
4c59b7d1 366 fdb_info->info.extack = extack;
ff23b91c
PM		 367 fdb_info->remote_ip = rd->remote_ip;
368 fdb_info->remote_port = rd->remote_port;
369 fdb_info->remote_vni = rd->remote_vni;
370 fdb_info->remote_ifindex = rd->remote_ifindex;
371 memcpy(fdb_info->eth_addr, fdb->eth_addr, ETH_ALEN);
372 fdb_info->vni = fdb->vni;
373 fdb_info->offloaded = rd->offloaded;
374 fdb_info->added_by_user = fdb->flags & NTF_VXLAN_ADDED_BY_USER;
375}
376
61f46fe8
PM		 377static int vxlan_fdb_switchdev_call_notifiers(struct vxlan_dev *vxlan,
378 struct vxlan_fdb *fdb,
379 struct vxlan_rdst *rd,
4c59b7d1
PM		 380 bool adding,
381 struct netlink_ext_ack *extack)
9a997353
PM		 382{
383 struct switchdev_notifier_vxlan_fdb_info info;
384 enum switchdev_notifier_type notifier_type;
61f46fe8 385 int ret;
9a997353
PM		 386
387 if (WARN_ON(!rd))
61f46fe8 388 return 0;
9a997353
PM		 389
390 notifier_type = adding ? SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE
391 : SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE;
4c59b7d1 392 vxlan_fdb_switchdev_notifier_info(vxlan, fdb, rd, NULL, &info);
61f46fe8 393 ret = call_switchdev_notifiers(notifier_type, vxlan->dev,
6685987c 394 &info.info, extack);
61f46fe8 395 return notifier_to_errno(ret);
9a997353
PM		 396}
397
61f46fe8 398static int vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
4c59b7d1
PM		 399 struct vxlan_rdst *rd, int type, bool swdev_notify,
400 struct netlink_ext_ack *extack)
9a997353 401{
61f46fe8
PM		 402 int err;
403
0e6160f3
PM		 404 if (swdev_notify) {
405 switch (type) {
406 case RTM_NEWNEIGH:
61f46fe8 407 err = vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd,
4c59b7d1 408 true, extack);
61f46fe8
PM		 409 if (err)
410 return err;
0e6160f3
PM		 411 break;
412 case RTM_DELNEIGH:
413 vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd,
4c59b7d1 414 false, extack);
0e6160f3
PM		 415 break;
416 }
9a997353
PM		 417 }
418
419 __vxlan_fdb_notify(vxlan, fdb, rd, type);
61f46fe8 420 return 0;
9a997353
PM		 421}
422
e4c7ed41 423static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa)
e4f67add
DS		 424{
425 struct vxlan_dev *vxlan = netdev_priv(dev);
bb3fd687
SH		 426 struct vxlan_fdb f = {
427 .state = NUD_STALE,
428 };
429 struct vxlan_rdst remote = {
e4c7ed41 430 .remote_ip = *ipa, /* goes to NDA_DST */
54bfd872 431 .remote_vni = cpu_to_be32(VXLAN_N_VID),
bb3fd687 432 };
3e61aa8f 433
4c59b7d1 434 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true, NULL);
e4f67add
DS		 435}
436
437static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN])
438{
bb3fd687
SH		 439 struct vxlan_fdb f = {
440 .state = NUD_STALE,
441 };
9e4b93f9 442 struct vxlan_rdst remote = { };
e4f67add 443
e4f67add
DS		 444 memcpy(f.eth_addr, eth_addr, ETH_ALEN);
445
4c59b7d1 446 vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true, NULL);
e4f67add
DS		 447}
448
d342894c 449/* Hash Ethernet address */
450static u32 eth_hash(const unsigned char *addr)
451{
452 u64 value = get_unaligned((u64 *)addr);
453
454 /* only want 6 bytes */
455#ifdef __BIG_ENDIAN
d342894c 456 value >>= 16;
321fb991 457#else
458 value <<= 16;
d342894c 459#endif
460 return hash_64(value, FDB_HASH_BITS);
461}
462
3ad7a4b1
RP		 463static u32 eth_vni_hash(const unsigned char *addr, __be32 vni)
464{
465 /* use 1 byte of OUI and 3 bytes of NIC */
466 u32 key = get_unaligned((u32 *)(addr + 2));
467
468 return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1);
469}
470
fe1e0713
L		 471static u32 fdb_head_index(struct vxlan_dev *vxlan, const u8 *mac, __be32 vni)
472{
473 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)
474 return eth_vni_hash(mac, vni);
475 else
476 return eth_hash(mac);
477}
478
d342894c 479/* Hash chain to use given mac address */
480static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan,
3ad7a4b1 481 const u8 *mac, __be32 vni)
d342894c 482{
fe1e0713 483 return &vxlan->fdb_head[fdb_head_index(vxlan, mac, vni)];
d342894c 484}
485
486/* Look up Ethernet address in forwarding table */
014be2c8 487static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan,
3ad7a4b1 488 const u8 *mac, __be32 vni)
d342894c 489{
3ad7a4b1 490 struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni);
d342894c 491 struct vxlan_fdb *f;
d342894c 492
b67bfe0d 493 hlist_for_each_entry_rcu(f, head, hlist) {
3ad7a4b1 494 if (ether_addr_equal(mac, f->eth_addr)) {
dc5321d7 495 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) {
3ad7a4b1
RP		 496 if (vni == f->vni)
497 return f;
498 } else {
499 return f;
500 }
501 }
d342894c 502 }
503
504 return NULL;
505}
506
014be2c8 507static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan,
3ad7a4b1 508 const u8 *mac, __be32 vni)
014be2c8
SS		 509{
510 struct vxlan_fdb *f;
511
3ad7a4b1 512 f = __vxlan_find_mac(vxlan, mac, vni);
016f3d18 513 if (f && f->used != jiffies)
014be2c8
SS		 514 f->used = jiffies;
515
516 return f;
517}
518
a5e7c10a
MR		 519/* caller should hold vxlan->hash_lock */
520static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f,
e4c7ed41 521 union vxlan_addr *ip, __be16 port,
54bfd872 522 __be32 vni, __u32 ifindex)
6681712d 523{
3e61aa8f 524 struct vxlan_rdst *rd;
6681712d 525
3e61aa8f 526 list_for_each_entry(rd, &f->remotes, list) {
e4c7ed41 527 if (vxlan_addr_equal(&rd->remote_ip, ip) &&
6681712d
DS		 528 rd->remote_port == port &&
529 rd->remote_vni == vni &&
530 rd->remote_ifindex == ifindex)
a5e7c10a 531 return rd;
6681712d 532 }
3e61aa8f 533
a5e7c10a
MR		 534 return NULL;
535}
536
1941f1d6
PM		 537int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
538 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
539{
540 struct vxlan_dev *vxlan = netdev_priv(dev);
541 u8 eth_addr[ETH_ALEN + 2] = { 0 };
542 struct vxlan_rdst *rdst;
543 struct vxlan_fdb *f;
544 int rc = 0;
545
546 if (is_multicast_ether_addr(mac) ||
547 is_zero_ether_addr(mac))
548 return -EINVAL;
549
550 ether_addr_copy(eth_addr, mac);
551
552 rcu_read_lock();
553
554 f = __vxlan_find_mac(vxlan, eth_addr, vni);
555 if (!f) {
556 rc = -ENOENT;
557 goto out;
558 }
559
560 rdst = first_remote_rcu(f);
4c59b7d1 561 vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, NULL, fdb_info);
1941f1d6
PM		 562
563out:
564 rcu_read_unlock();
565 return rc;
566}
567EXPORT_SYMBOL_GPL(vxlan_fdb_find_uc);
568
4f89f5b5
PM		 569static int vxlan_fdb_notify_one(struct notifier_block *nb,
570 const struct vxlan_dev *vxlan,
571 const struct vxlan_fdb *f,
4c59b7d1
PM		 572 const struct vxlan_rdst *rdst,
573 struct netlink_ext_ack *extack)
4f89f5b5
PM		 574{
575 struct switchdev_notifier_vxlan_fdb_info fdb_info;
576 int rc;
577
4c59b7d1 578 vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, extack, &fdb_info);
4f89f5b5
PM		 579 rc = nb->notifier_call(nb, SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
580 &fdb_info);
581 return notifier_to_errno(rc);
582}
583
584int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
4c59b7d1
PM		 585 struct notifier_block *nb,
586 struct netlink_ext_ack *extack)
4f89f5b5
PM		 587{
588 struct vxlan_dev *vxlan;
589 struct vxlan_rdst *rdst;
590 struct vxlan_fdb *f;
591 unsigned int h;
592 int rc = 0;
593
594 if (!netif_is_vxlan(dev))
595 return -EINVAL;
596 vxlan = netdev_priv(dev);
597
4f89f5b5 598 for (h = 0; h < FDB_HASH_SIZE; ++h) {
fe1e0713 599 spin_lock_bh(&vxlan->hash_lock[h]);
4f89f5b5
PM		 600 hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist) {
601 if (f->vni == vni) {
602 list_for_each_entry(rdst, &f->remotes, list) {
603 rc = vxlan_fdb_notify_one(nb, vxlan,
4c59b7d1
PM		 604 f, rdst,
605 extack);
4f89f5b5 606 if (rc)
fe1e0713 607 goto unlock;
4f89f5b5
PM		 608 }
609 }
610 }
fe1e0713 611 spin_unlock_bh(&vxlan->hash_lock[h]);
4f89f5b5 612 }
fe1e0713 613 return 0;
4f89f5b5 614
fe1e0713
L		 615unlock:
616 spin_unlock_bh(&vxlan->hash_lock[h]);
4f89f5b5
PM		 617 return rc;
618}
619EXPORT_SYMBOL_GPL(vxlan_fdb_replay);
620
e5ff4b19
PM		 621void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
622{
623 struct vxlan_dev *vxlan;
624 struct vxlan_rdst *rdst;
625 struct vxlan_fdb *f;
626 unsigned int h;
627
628 if (!netif_is_vxlan(dev))
629 return;
630 vxlan = netdev_priv(dev);
631
e5ff4b19 632 for (h = 0; h < FDB_HASH_SIZE; ++h) {
fe1e0713 633 spin_lock_bh(&vxlan->hash_lock[h]);
e5ff4b19
PM		 634 hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist)
635 if (f->vni == vni)
636 list_for_each_entry(rdst, &f->remotes, list)
637 rdst->offloaded = false;
fe1e0713 638 spin_unlock_bh(&vxlan->hash_lock[h]);
e5ff4b19 639 }
fe1e0713 640
e5ff4b19
PM		 641}
642EXPORT_SYMBOL_GPL(vxlan_fdb_clear_offload);
643
906dc186
TR		 644/* Replace destination of unicast mac */
645static int vxlan_fdb_replace(struct vxlan_fdb *f,
54bfd872 646 union vxlan_addr *ip, __be16 port, __be32 vni,
ccdfd4f7 647 __u32 ifindex, struct vxlan_rdst *oldrd)
906dc186
TR		 648{
649 struct vxlan_rdst *rd;
650
651 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
652 if (rd)
653 return 0;
654
655 rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list);
656 if (!rd)
657 return 0;
0c1d70af 658
ccdfd4f7 659 *oldrd = *rd;
0c1d70af 660 dst_cache_reset(&rd->dst_cache);
e4c7ed41 661 rd->remote_ip = *ip;
906dc186
TR		 662 rd->remote_port = port;
663 rd->remote_vni = vni;
664 rd->remote_ifindex = ifindex;
6ad0b5a4 665 rd->offloaded = false;
906dc186
TR		 666 return 1;
667}
668
a5e7c10a
MR		 669/* Add/update destinations for multicast */
670static int vxlan_fdb_append(struct vxlan_fdb *f,
54bfd872 671 union vxlan_addr *ip, __be16 port, __be32 vni,
9e4b93f9 672 __u32 ifindex, struct vxlan_rdst **rdp)
a5e7c10a
MR		 673{
674 struct vxlan_rdst *rd;
675
676 rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
677 if (rd)
678 return 0;
679
6681712d
DS		 680 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
681 if (rd == NULL)
682 return -ENOBUFS;
0c1d70af
PA		 683
684 if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) {
685 kfree(rd);
686 return -ENOBUFS;
687 }
688
e4c7ed41 689 rd->remote_ip = *ip;
6681712d 690 rd->remote_port = port;
0efe1173 691 rd->offloaded = false;
6681712d
DS		 692 rd->remote_vni = vni;
693 rd->remote_ifindex = ifindex;
3e61aa8f
SH		 694
695 list_add_tail_rcu(&rd->list, &f->remotes);
696
9e4b93f9 697 *rdp = rd;
6681712d
DS		 698 return 1;
699}
700
dfd8645e
TH		 701static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
702 unsigned int off,
703 struct vxlanhdr *vh, size_t hdrlen,
54bfd872
JB		 704 __be32 vni_field,
705 struct gro_remcsum *grc,
0ace2ca8 706 bool nopartial)
dfd8645e 707{
b7fe10e5 708 size_t start, offset;
dfd8645e
TH		 709
710 if (skb->remcsum_offload)
b7fe10e5 711 return vh;
dfd8645e
TH		 712
713 if (!NAPI_GRO_CB(skb)->csum_valid)
714 return NULL;
715
54bfd872
JB		 716 start = vxlan_rco_start(vni_field);
717 offset = start + vxlan_rco_offset(vni_field);
dfd8645e 718
b7fe10e5
TH		 719 vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen,
720 start, offset, grc, nopartial);
dfd8645e
TH		 721
722 skb->remcsum_offload = 1;
723
724 return vh;
725}
726
d4546c25
DM		 727static struct sk_buff *vxlan_gro_receive(struct sock *sk,
728 struct list_head *head,
729 struct sk_buff *skb)
dc01e7d3 730{
d4546c25
DM		 731 struct sk_buff *pp = NULL;
732 struct sk_buff *p;
dc01e7d3 733 struct vxlanhdr *vh, *vh2;
9b174d88 734 unsigned int hlen, off_vx;
dc01e7d3 735 int flush = 1;
5602c48c 736 struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk);
54bfd872 737 __be32 flags;
26c4f7da
TH		 738 struct gro_remcsum grc;
739
740 skb_gro_remcsum_init(&grc);
dc01e7d3
OG		 741
742 off_vx = skb_gro_offset(skb);
743 hlen = off_vx + sizeof(*vh);
744 vh = skb_gro_header_fast(skb, off_vx);
745 if (skb_gro_header_hard(skb, hlen)) {
746 vh = skb_gro_header_slow(skb, hlen, off_vx);
747 if (unlikely(!vh))
748 goto out;
749 }
dc01e7d3 750
dfd8645e
TH		 751 skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr));
752
54bfd872 753 flags = vh->vx_flags;
dfd8645e
TH		 754
755 if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
756 vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
54bfd872 757 vh->vx_vni, &grc,
0ace2ca8
TH		 758 !!(vs->flags &
759 VXLAN_F_REMCSUM_NOPARTIAL));
dfd8645e
TH		 760
761 if (!vh)
762 goto out;
763 }
764
b7fe10e5
TH		 765 skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
766
d4546c25 767 list_for_each_entry(p, head, list) {
dc01e7d3
OG		 768 if (!NAPI_GRO_CB(p)->same_flow)
769 continue;
770
771 vh2 = (struct vxlanhdr *)(p->data + off_vx);
3511494c
TG		 772 if (vh->vx_flags != vh2->vx_flags ||
773 vh->vx_vni != vh2->vx_vni) {
dc01e7d3
OG		 774 NAPI_GRO_CB(p)->same_flow = 0;
775 continue;
776 }
dc01e7d3
OG		 777 }
778
fcd91dd4 779 pp = call_gro_receive(eth_gro_receive, head, skb);
c194cf93 780 flush = 0;
dc01e7d3 781
dc01e7d3 782out:
603d4cf8 783 skb_gro_flush_final_remcsum(skb, pp, flush, &grc);
dc01e7d3
OG		 784
785 return pp;
786}
787
5602c48c 788static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff)
dc01e7d3 789{
229740c6
JR		 790 /* Sets 'skb->inner_mac_header' since we are always called with
791 * 'skb->encapsulation' set.
792 */
9b174d88 793 return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr));
dc01e7d3
OG		 794}
795
25e20e73
RP		 796static struct vxlan_fdb *vxlan_fdb_alloc(struct vxlan_dev *vxlan,
797 const u8 *mac, __u16 state,
45598c1c 798 __be32 src_vni, __u16 ndm_flags)
25e20e73
RP		 799{
800 struct vxlan_fdb *f;
801
802 f = kmalloc(sizeof(*f), GFP_ATOMIC);
803 if (!f)
804 return NULL;
805 f->state = state;
806 f->flags = ndm_flags;
807 f->updated = f->used = jiffies;
808 f->vni = src_vni;
809 INIT_LIST_HEAD(&f->remotes);
810 memcpy(f->eth_addr, mac, ETH_ALEN);
811
812 return f;
813}
814
7c31e54a
TY		 815static void vxlan_fdb_insert(struct vxlan_dev *vxlan, const u8 *mac,
816 __be32 src_vni, struct vxlan_fdb *f)
817{
818 ++vxlan->addrcnt;
819 hlist_add_head_rcu(&f->hlist,
820 vxlan_fdb_head(vxlan, mac, src_vni));
821}
822
d342894c 823static int vxlan_fdb_create(struct vxlan_dev *vxlan,
25e20e73
RP		 824 const u8 *mac, union vxlan_addr *ip,
825 __u16 state, __be16 port, __be32 src_vni,
45598c1c 826 __be32 vni, __u32 ifindex, __u16 ndm_flags,
25e20e73
RP		 827 struct vxlan_fdb **fdb)
828{
829 struct vxlan_rdst *rd = NULL;
830 struct vxlan_fdb *f;
831 int rc;
832
833 if (vxlan->cfg.addrmax &&
834 vxlan->addrcnt >= vxlan->cfg.addrmax)
835 return -ENOSPC;
836
837 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
838 f = vxlan_fdb_alloc(vxlan, mac, state, src_vni, ndm_flags);
839 if (!f)
840 return -ENOMEM;
841
842 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
843 if (rc < 0) {
844 kfree(f);
845 return rc;
846 }
847
25e20e73
RP		 848 *fdb = f;
849
850 return 0;
851}
852
7c31e54a 853static void __vxlan_fdb_free(struct vxlan_fdb *f)
c2b200e0 854{
c2b200e0
PM		 855 struct vxlan_rdst *rd, *nd;
856
857 list_for_each_entry_safe(rd, nd, &f->remotes, list) {
858 dst_cache_destroy(&rd->dst_cache);
859 kfree(rd);
860 }
861 kfree(f);
862}
863
7c31e54a
TY		 864static void vxlan_fdb_free(struct rcu_head *head)
865{
866 struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
867
868 __vxlan_fdb_free(f);
869}
870
c2b200e0
PM		 871static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,
872 bool do_notify, bool swdev_notify)
873{
874 struct vxlan_rdst *rd;
875
876 netdev_dbg(vxlan->dev, "delete %pM\n", f->eth_addr);
877
878 --vxlan->addrcnt;
879 if (do_notify)
880 list_for_each_entry(rd, &f->remotes, list)
881 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH,
4c59b7d1 882 swdev_notify, NULL);
c2b200e0
PM		 883
884 hlist_del_rcu(&f->hlist);
885 call_rcu(&f->rcu, vxlan_fdb_free);
886}
887
fc4aa1ca
PM		 888static void vxlan_dst_free(struct rcu_head *head)
889{
890 struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu);
891
892 dst_cache_destroy(&rd->dst_cache);
893 kfree(rd);
894}
895
a76d1ca2
PM		 896static int vxlan_fdb_update_existing(struct vxlan_dev *vxlan,
897 union vxlan_addr *ip,
898 __u16 state, __u16 flags,
899 __be16 port, __be32 vni,
900 __u32 ifindex, __u16 ndm_flags,
901 struct vxlan_fdb *f,
4c59b7d1
PM		 902 bool swdev_notify,
903 struct netlink_ext_ack *extack)
d342894c 904{
45598c1c 905 __u16 fdb_flags = (ndm_flags & ~NTF_USE);
9e4b93f9 906 struct vxlan_rdst *rd = NULL;
ccdfd4f7 907 struct vxlan_rdst oldrd;
d342894c 908 int notify = 0;
61f46fe8
PM		 909 int rc = 0;
910 int err;
d342894c 911
a76d1ca2
PM		 912 /* Do not allow an externally learned entry to take over an entry added
913 * by the user.
914 */
915 if (!(fdb_flags & NTF_EXT_LEARNED) ||
916 !(f->flags & NTF_VXLAN_ADDED_BY_USER)) {
917 if (f->state != state) {
918 f->state = state;
919 f->updated = jiffies;
920 notify = 1;
ae884082 921 }
a76d1ca2
PM		 922 if (f->flags != fdb_flags) {
923 f->flags = fdb_flags;
924 f->updated = jiffies;
925 notify = 1;
906dc186 926 }
a76d1ca2 927 }
6681712d 928
a76d1ca2
PM		 929 if ((flags & NLM_F_REPLACE)) {
930 /* Only change unicasts */
931 if (!(is_multicast_ether_addr(f->eth_addr) ||
932 is_zero_ether_addr(f->eth_addr))) {
933 rc = vxlan_fdb_replace(f, ip, port, vni,
ccdfd4f7 934 ifindex, &oldrd);
6681712d 935 notify |= rc;
a76d1ca2 936 } else {
906dc186 937 return -EOPNOTSUPP;
a76d1ca2
PM		 938 }
939 }
940 if ((flags & NLM_F_APPEND) &&
941 (is_multicast_ether_addr(f->eth_addr) ||
942 is_zero_ether_addr(f->eth_addr))) {
943 rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd);
906dc186 944
25e20e73 945 if (rc < 0)
17b46365 946 return rc;
a76d1ca2 947 notify |= rc;
d342894c 948 }
949
a76d1ca2
PM		 950 if (ndm_flags & NTF_USE)
951 f->used = jiffies;
952
9e4b93f9
ND		 953 if (notify) {
954 if (rd == NULL)
955 rd = first_remote_rtnl(f);
a76d1ca2 956
61f46fe8 957 err = vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH,
4c59b7d1 958 swdev_notify, extack);
61f46fe8
PM		 959 if (err)
960 goto err_notify;
9e4b93f9 961 }
d342894c 962
963 return 0;
61f46fe8
PM		 964
965err_notify:
966 if ((flags & NLM_F_REPLACE) && rc)
967 *rd = oldrd;
fc4aa1ca 968 else if ((flags & NLM_F_APPEND) && rc) {
61f46fe8 969 list_del_rcu(&rd->list);
fc4aa1ca
PM		 970 call_rcu(&rd->rcu, vxlan_dst_free);
971 }
61f46fe8 972 return err;
d342894c 973}
974
a76d1ca2
PM		 975static int vxlan_fdb_update_create(struct vxlan_dev *vxlan,
976 const u8 *mac, union vxlan_addr *ip,
977 __u16 state, __u16 flags,
978 __be16 port, __be32 src_vni, __be32 vni,
979 __u32 ifindex, __u16 ndm_flags,
4c59b7d1
PM		 980 bool swdev_notify,
981 struct netlink_ext_ack *extack)
a76d1ca2
PM		 982{
983 __u16 fdb_flags = (ndm_flags & ~NTF_USE);
984 struct vxlan_fdb *f;
985 int rc;
986
987 /* Disallow replace to add a multicast entry */
988 if ((flags & NLM_F_REPLACE) &&
989 (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac)))
990 return -EOPNOTSUPP;
991
992 netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip);
993 rc = vxlan_fdb_create(vxlan, mac, ip, state, port, src_vni,
994 vni, ifindex, fdb_flags, &f);
995 if (rc < 0)
996 return rc;
997
7c31e54a 998 vxlan_fdb_insert(vxlan, mac, src_vni, f);
61f46fe8 999 rc = vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_NEWNEIGH,
4c59b7d1 1000 swdev_notify, extack);
61f46fe8
PM		 1001 if (rc)
1002 goto err_notify;
1003
a76d1ca2 1004 return 0;
61f46fe8
PM		 1005
1006err_notify:
1007 vxlan_fdb_destroy(vxlan, f, false, false);
1008 return rc;
a76d1ca2
PM		 1009}
1010
1011/* Add new entry to forwarding table -- assumes lock held */
1012static int vxlan_fdb_update(struct vxlan_dev *vxlan,
1013 const u8 *mac, union vxlan_addr *ip,
1014 __u16 state, __u16 flags,
1015 __be16 port, __be32 src_vni, __be32 vni,
1016 __u32 ifindex, __u16 ndm_flags,
4c59b7d1
PM		 1017 bool swdev_notify,
1018 struct netlink_ext_ack *extack)
a76d1ca2
PM		 1019{
1020 struct vxlan_fdb *f;
1021
1022 f = __vxlan_find_mac(vxlan, mac, src_vni);
1023 if (f) {
1024 if (flags & NLM_F_EXCL) {
1025 netdev_dbg(vxlan->dev,
1026 "lost race to create %pM\n", mac);
1027 return -EEXIST;
1028 }
1029
1030 return vxlan_fdb_update_existing(vxlan, ip, state, flags, port,
1031 vni, ifindex, ndm_flags, f,
4c59b7d1 1032 swdev_notify, extack);
a76d1ca2
PM		 1033 } else {
1034 if (!(flags & NLM_F_CREATE))
1035 return -ENOENT;
1036
1037 return vxlan_fdb_update_create(vxlan, mac, ip, state, flags,
1038 port, src_vni, vni, ifindex,
4c59b7d1 1039 ndm_flags, swdev_notify, extack);
a76d1ca2
PM		 1040 }
1041}
1042
35cf2845 1043static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,
0e6160f3 1044 struct vxlan_rdst *rd, bool swdev_notify)
35cf2845
LR		 1045{
1046 list_del_rcu(&rd->list);
4c59b7d1 1047 vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH, swdev_notify, NULL);
35cf2845
LR		 1048 call_rcu(&rd->rcu, vxlan_dst_free);
1049}
1050
f0b074be 1051static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
3ad7a4b1
RP		 1052 union vxlan_addr *ip, __be16 *port, __be32 *src_vni,
1053 __be32 *vni, u32 *ifindex)
d342894c 1054{
6681712d 1055 struct net *net = dev_net(vxlan->dev);
e4c7ed41 1056 int err;
d342894c 1057
f0b074be 1058 if (tb[NDA_DST]) {
e4c7ed41
CW		 1059 err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
1060 if (err)
1061 return err;
f0b074be 1062 } else {
e4c7ed41
CW		 1063 union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
1064 if (remote->sa.sa_family == AF_INET) {
1065 ip->sin.sin_addr.s_addr = htonl(INADDR_ANY);
1066 ip->sa.sa_family = AF_INET;
1067#if IS_ENABLED(CONFIG_IPV6)
1068 } else {
1069 ip->sin6.sin6_addr = in6addr_any;
1070 ip->sa.sa_family = AF_INET6;
1071#endif
1072 }
f0b074be 1073 }
d342894c 1074
6681712d 1075 if (tb[NDA_PORT]) {
73cf3317 1076 if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
6681712d 1077 return -EINVAL;
f0b074be
MR		 1078 *port = nla_get_be16(tb[NDA_PORT]);
1079 } else {
0dfbdf41 1080 *port = vxlan->cfg.dst_port;
f0b074be 1081 }
6681712d
DS		 1082
1083 if (tb[NDA_VNI]) {
1084 if (nla_len(tb[NDA_VNI]) != sizeof(u32))
1085 return -EINVAL;
54bfd872 1086 *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
f0b074be
MR		 1087 } else {
1088 *vni = vxlan->default_dst.remote_vni;
1089 }
6681712d 1090
3ad7a4b1
RP		 1091 if (tb[NDA_SRC_VNI]) {
1092 if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32))
1093 return -EINVAL;
1094 *src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI]));
1095 } else {
1096 *src_vni = vxlan->default_dst.remote_vni;
1097 }
1098
6681712d 1099 if (tb[NDA_IFINDEX]) {
5abb0029 1100 struct net_device *tdev;
6681712d
DS		 1101
1102 if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
1103 return -EINVAL;
f0b074be 1104 *ifindex = nla_get_u32(tb[NDA_IFINDEX]);
73763949 1105 tdev = __dev_get_by_index(net, *ifindex);
5abb0029 1106 if (!tdev)
6681712d 1107 return -EADDRNOTAVAIL;
f0b074be
MR		 1108 } else {
1109 *ifindex = 0;
1110 }
1111
1112 return 0;
1113}
1114
1115/* Add static entry (via netlink) */
1116static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1117 struct net_device *dev,
87b0984e
PM		 1118 const unsigned char *addr, u16 vid, u16 flags,
1119 struct netlink_ext_ack *extack)
f0b074be
MR		 1120{
1121 struct vxlan_dev *vxlan = netdev_priv(dev);
1122 /* struct net *net = dev_net(vxlan->dev); */
e4c7ed41 1123 union vxlan_addr ip;
f0b074be 1124 __be16 port;
3ad7a4b1 1125 __be32 src_vni, vni;
54bfd872 1126 u32 ifindex;
fe1e0713 1127 u32 hash_index;
f0b074be
MR		 1128 int err;
1129
1130 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) {
1131 pr_info("RTM_NEWNEIGH with invalid state %#x\n",
1132 ndm->ndm_state);
1133 return -EINVAL;
1134 }
1135
1136 if (tb[NDA_DST] == NULL)
1137 return -EINVAL;
1138
3ad7a4b1 1139 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex);
f0b074be
MR		 1140 if (err)
1141 return err;
6681712d 1142
5933a7bb
MR		 1143 if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family)
1144 return -EAFNOSUPPORT;
1145
fe1e0713
L		 1146 hash_index = fdb_head_index(vxlan, addr, src_vni);
1147 spin_lock_bh(&vxlan->hash_lock[hash_index]);
25e20e73 1148 err = vxlan_fdb_update(vxlan, addr, &ip, ndm->ndm_state, flags,
45598c1c
PM		 1149 port, src_vni, vni, ifindex,
1150 ndm->ndm_flags | NTF_VXLAN_ADDED_BY_USER,
4c59b7d1 1151 true, extack);
fe1e0713 1152 spin_unlock_bh(&vxlan->hash_lock[hash_index]);
d342894c 1153
1154 return err;
1155}
1156
3ad7a4b1
RP		 1157static int __vxlan_fdb_delete(struct vxlan_dev *vxlan,
1158 const unsigned char *addr, union vxlan_addr ip,
fc39c38b 1159 __be16 port, __be32 src_vni, __be32 vni,
0e6160f3 1160 u32 ifindex, bool swdev_notify)
d342894c 1161{
d342894c 1162 struct vxlan_fdb *f;
bc7892ba 1163 struct vxlan_rdst *rd = NULL;
3ad7a4b1 1164 int err = -ENOENT;
bc7892ba 1165
3ad7a4b1 1166 f = vxlan_find_mac(vxlan, addr, src_vni);
bc7892ba 1167 if (!f)
3ad7a4b1 1168 return err;
bc7892ba 1169
e4c7ed41
CW		 1170 if (!vxlan_addr_any(&ip)) {
1171 rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex);
bc7892ba
MR		 1172 if (!rd)
1173 goto out;
1174 }
1175
bc7892ba
MR		 1176 /* remove a destination if it's not the only one on the list,
1177 * otherwise destroy the fdb entry
1178 */
1179 if (rd && !list_is_singular(&f->remotes)) {
0e6160f3 1180 vxlan_fdb_dst_destroy(vxlan, f, rd, swdev_notify);
bc7892ba 1181 goto out;
d342894c 1182 }
bc7892ba 1183
0e6160f3 1184 vxlan_fdb_destroy(vxlan, f, true, swdev_notify);
bc7892ba
MR		 1185
1186out:
3ad7a4b1
RP		 1187 return 0;
1188}
1189
1190/* Delete entry (via netlink) */
1191static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
1192 struct net_device *dev,
1193 const unsigned char *addr, u16 vid)
1194{
1195 struct vxlan_dev *vxlan = netdev_priv(dev);
1196 union vxlan_addr ip;
1197 __be32 src_vni, vni;
1198 __be16 port;
1199 u32 ifindex;
fe1e0713 1200 u32 hash_index;
3ad7a4b1
RP		 1201 int err;
1202
1203 err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex);
1204 if (err)
1205 return err;
1206
fe1e0713
L		 1207 hash_index = fdb_head_index(vxlan, addr, src_vni);
1208 spin_lock_bh(&vxlan->hash_lock[hash_index]);
0e6160f3
PM		 1209 err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex,
1210 true);
fe1e0713 1211 spin_unlock_bh(&vxlan->hash_lock[hash_index]);
d342894c 1212
1213 return err;
1214}
1215
1216/* Dump forwarding table */
1217static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3 1218 struct net_device *dev,
d297653d 1219 struct net_device *filter_dev, int *idx)
d342894c 1220{
1221 struct vxlan_dev *vxlan = netdev_priv(dev);
1222 unsigned int h;
d297653d 1223 int err = 0;
d342894c 1224
1225 for (h = 0; h < FDB_HASH_SIZE; ++h) {
1226 struct vxlan_fdb *f;
d342894c 1227
b67bfe0d 1228 hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
6681712d 1229 struct vxlan_rdst *rd;
6681712d 1230
3e61aa8f 1231 list_for_each_entry_rcu(rd, &f->remotes, list) {
d297653d 1232 if (*idx < cb->args[2])
07a51cd3
AW		 1233 goto skip;
1234
6681712d
DS		 1235 err = vxlan_fdb_info(skb, vxlan, f,
1236 NETLINK_CB(cb->skb).portid,
1237 cb->nlh->nlmsg_seq,
1238 RTM_NEWNEIGH,
1239 NLM_F_MULTI, rd);
d297653d 1240 if (err < 0)
3e61aa8f 1241 goto out;
3e61aa8f 1242skip:
d297653d 1243 *idx += 1;
07a51cd3 1244 }
d342894c 1245 }
1246 }
3e61aa8f 1247out:
d297653d 1248 return err;
d342894c 1249}
1250
474c3c89
RP		 1251static int vxlan_fdb_get(struct sk_buff *skb,
1252 struct nlattr *tb[],
1253 struct net_device *dev,
1254 const unsigned char *addr,
1255 u16 vid, u32 portid, u32 seq,
1256 struct netlink_ext_ack *extack)
1257{
1258 struct vxlan_dev *vxlan = netdev_priv(dev);
1259 struct vxlan_fdb *f;
1260 __be32 vni;
1261 int err;
1262
1263 if (tb[NDA_VNI])
1264 vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
1265 else
1266 vni = vxlan->default_dst.remote_vni;
1267
1268 rcu_read_lock();
1269
1270 f = __vxlan_find_mac(vxlan, addr, vni);
1271 if (!f) {
1272 NL_SET_ERR_MSG(extack, "Fdb entry not found");
1273 err = -ENOENT;
1274 goto errout;
1275 }
1276
1277 err = vxlan_fdb_info(skb, vxlan, f, portid, seq,
1278 RTM_NEWNEIGH, 0, first_remote_rcu(f));
1279errout:
1280 rcu_read_unlock();
1281 return err;
1282}
1283
d342894c 1284/* Watch incoming packets to learn mapping between Ethernet address
1285 * and Tunnel endpoint.
c4b49512 1286 * Return true if packet is bogus and should be dropped.
d342894c 1287 */
26a41ae6 1288static bool vxlan_snoop(struct net_device *dev,
3ad7a4b1 1289 union vxlan_addr *src_ip, const u8 *src_mac,
87613de9 1290 u32 src_ifindex, __be32 vni)
d342894c 1291{
1292 struct vxlan_dev *vxlan = netdev_priv(dev);
1293 struct vxlan_fdb *f;
87613de9
MS		 1294 u32 ifindex = 0;
1295
1296#if IS_ENABLED(CONFIG_IPV6)
1297 if (src_ip->sa.sa_family == AF_INET6 &&
1298 (ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL))
1299 ifindex = src_ifindex;
1300#endif
d342894c 1301
3ad7a4b1 1302 f = vxlan_find_mac(vxlan, src_mac, vni);
d342894c 1303 if (likely(f)) {
5ca5461c 1304 struct vxlan_rdst *rdst = first_remote_rcu(f);
3e61aa8f 1305
87613de9
MS		 1306 if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) &&
1307 rdst->remote_ifindex == ifindex))
26a41ae6 1308 return false;
1309
1310 /* Don't migrate static entries, drop packets */
e0090a9e 1311 if (f->state & (NUD_PERMANENT | NUD_NOARP))
26a41ae6 1312 return true;
d342894c 1313
1314 if (net_ratelimit())
1315 netdev_info(dev,
e4c7ed41 1316 "%pM migrated from %pIS to %pIS\n",
a4870f79 1317 src_mac, &rdst->remote_ip.sa, &src_ip->sa);
d342894c 1318
e4c7ed41 1319 rdst->remote_ip = *src_ip;
d342894c 1320 f->updated = jiffies;
4c59b7d1 1321 vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH, true, NULL);
d342894c 1322 } else {
fe1e0713
L		 1323 u32 hash_index = fdb_head_index(vxlan, src_mac, vni);
1324
d342894c 1325 /* learned new entry */
fe1e0713 1326 spin_lock(&vxlan->hash_lock[hash_index]);
3bf74b1a 1327
1328 /* close off race between vxlan_flush and incoming packets */
1329 if (netif_running(dev))
25e20e73 1330 vxlan_fdb_update(vxlan, src_mac, src_ip,
3bf74b1a 1331 NUD_REACHABLE,
1332 NLM_F_EXCL|NLM_F_CREATE,
0dfbdf41 1333 vxlan->cfg.dst_port,
3ad7a4b1 1334 vni,
3bf74b1a 1335 vxlan->default_dst.remote_vni,
4c59b7d1 1336 ifindex, NTF_SELF, true, NULL);
fe1e0713 1337 spin_unlock(&vxlan->hash_lock[hash_index]);
d342894c 1338 }
26a41ae6 1339
1340 return false;
d342894c 1341}
1342
d342894c 1343/* See if multicast group is already in use by other ID */
95ab0991 1344static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
d342894c 1345{
553675fb 1346 struct vxlan_dev *vxlan;
c6fcc4fc 1347 struct vxlan_sock *sock4;
4053ab1b
AB		 1348#if IS_ENABLED(CONFIG_IPV6)
1349 struct vxlan_sock *sock6;
1350#endif
b1be00a6 1351 unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
d342894c 1352
c6fcc4fc 1353 sock4 = rtnl_dereference(dev->vn4_sock);
1354
95ab0991
G		 1355 /* The vxlan_sock is only used by dev, leaving group has
1356 * no effect on other vxlan devices.
1357 */
66af846f 1358 if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1)
95ab0991 1359 return false;
b1be00a6 1360#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1361 sock6 = rtnl_dereference(dev->vn6_sock);
66af846f 1362 if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1)
b1be00a6
JB		 1363 return false;
1364#endif
95ab0991 1365
553675fb 1366 list_for_each_entry(vxlan, &vn->vxlan_list, next) {
95ab0991 1367 if (!netif_running(vxlan->dev) || vxlan == dev)
553675fb 1368 continue;
d342894c 1369
c6fcc4fc 1370 if (family == AF_INET &&
1371 rtnl_dereference(vxlan->vn4_sock) != sock4)
95ab0991 1372 continue;
b1be00a6 1373#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1374 if (family == AF_INET6 &&
1375 rtnl_dereference(vxlan->vn6_sock) != sock6)
b1be00a6
JB		 1376 continue;
1377#endif
95ab0991
G		 1378
1379 if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
1380 &dev->default_dst.remote_ip))
1381 continue;
1382
1383 if (vxlan->default_dst.remote_ifindex !=
1384 dev->default_dst.remote_ifindex)
1385 continue;
1386
1387 return true;
553675fb 1388 }
d342894c 1389
1390 return false;
1391}
1392
544a773a 1393static bool __vxlan_sock_release_prep(struct vxlan_sock *vs)
7c47cedf 1394{
b1be00a6 1395 struct vxlan_net *vn;
012a5729 1396
b1be00a6 1397 if (!vs)
544a773a 1398 return false;
66af846f 1399 if (!refcount_dec_and_test(&vs->refcnt))
544a773a 1400 return false;
d342894c 1401
b1be00a6 1402 vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id);
1c51a915 1403 spin_lock(&vn->sock_lock);
7c47cedf 1404 hlist_del_rcu(&vs->hlist);
e7b3db5e 1405 udp_tunnel_notify_del_rx_port(vs->sock,
b9adcd69
AD		 1406 (vs->flags & VXLAN_F_GPE) ?
1407 UDP_TUNNEL_TYPE_VXLAN_GPE :
e7b3db5e 1408 UDP_TUNNEL_TYPE_VXLAN);
1c51a915
SH		 1409 spin_unlock(&vn->sock_lock);
1410
544a773a 1411 return true;
d342894c 1412}
1413
b1be00a6
JB		 1414static void vxlan_sock_release(struct vxlan_dev *vxlan)
1415{
c6fcc4fc 1416 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
b1be00a6 1417#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1418 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1419
57d88182 1420 RCU_INIT_POINTER(vxlan->vn6_sock, NULL);
544a773a
HFS		 1421#endif
1422
57d88182 1423 RCU_INIT_POINTER(vxlan->vn4_sock, NULL);
544a773a
HFS		 1424 synchronize_net();
1425
a53cb29b
MB		 1426 vxlan_vs_del_dev(vxlan);
1427
c6fcc4fc 1428 if (__vxlan_sock_release_prep(sock4)) {
1429 udp_tunnel_sock_release(sock4->sock);
1430 kfree(sock4);
544a773a
HFS		 1431 }
1432
1433#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 1434 if (__vxlan_sock_release_prep(sock6)) {
1435 udp_tunnel_sock_release(sock6->sock);
1436 kfree(sock6);
544a773a 1437 }
b1be00a6
JB		 1438#endif
1439}
1440
56ef9c90 1441/* Update multicast group membership when first VNI on
c4b49512 1442 * multicast address is brought up
7c47cedf 1443 */
56ef9c90 1444static int vxlan_igmp_join(struct vxlan_dev *vxlan)
d342894c 1445{
b1be00a6 1446 struct sock *sk;
e4c7ed41
CW		 1447 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1448 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1449 int ret = -EINVAL;
d342894c 1450
e4c7ed41 1451 if (ip->sa.sa_family == AF_INET) {
c6fcc4fc 1452 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
e4c7ed41
CW		 1453 struct ip_mreqn mreq = {
1454 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1455 .imr_ifindex = ifindex,
1456 };
1457
c6fcc4fc 1458 sk = sock4->sock->sk;
b1be00a6 1459 lock_sock(sk);
56ef9c90 1460 ret = ip_mc_join_group(sk, &mreq);
b1be00a6 1461 release_sock(sk);
e4c7ed41
CW		 1462#if IS_ENABLED(CONFIG_IPV6)
1463 } else {
c6fcc4fc 1464 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1465
1466 sk = sock6->sock->sk;
b1be00a6 1467 lock_sock(sk);
56ef9c90
MRL		 1468 ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
1469 &ip->sin6.sin6_addr);
b1be00a6 1470 release_sock(sk);
e4c7ed41
CW		 1471#endif
1472 }
3fc2de2f 1473
56ef9c90 1474 return ret;
3fc2de2f 1475}
1476
1477/* Inverse of vxlan_igmp_join when last VNI is brought down */
56ef9c90 1478static int vxlan_igmp_leave(struct vxlan_dev *vxlan)
3fc2de2f 1479{
b1be00a6 1480 struct sock *sk;
e4c7ed41
CW		 1481 union vxlan_addr *ip = &vxlan->default_dst.remote_ip;
1482 int ifindex = vxlan->default_dst.remote_ifindex;
149d7549 1483 int ret = -EINVAL;
3fc2de2f 1484
e4c7ed41 1485 if (ip->sa.sa_family == AF_INET) {
c6fcc4fc 1486 struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
e4c7ed41
CW		 1487 struct ip_mreqn mreq = {
1488 .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
1489 .imr_ifindex = ifindex,
1490 };
1491
c6fcc4fc 1492 sk = sock4->sock->sk;
b1be00a6 1493 lock_sock(sk);
56ef9c90 1494 ret = ip_mc_leave_group(sk, &mreq);
b1be00a6 1495 release_sock(sk);
e4c7ed41
CW		 1496#if IS_ENABLED(CONFIG_IPV6)
1497 } else {
c6fcc4fc 1498 struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
1499
1500 sk = sock6->sock->sk;
b1be00a6 1501 lock_sock(sk);
56ef9c90
MRL		 1502 ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
1503 &ip->sin6.sin6_addr);
b1be00a6 1504 release_sock(sk);
e4c7ed41
CW		 1505#endif
1506 }
d342894c 1507
56ef9c90 1508 return ret;
d342894c 1509}
1510
f14ecebb
JB		 1511static bool vxlan_remcsum(struct vxlanhdr *unparsed,
1512 struct sk_buff *skb, u32 vxflags)
dfd8645e 1513{
7d34fa75 1514 size_t start, offset;
dfd8645e 1515
f14ecebb
JB		 1516 if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload)
1517 goto out;
b7fe10e5 1518
f14ecebb
JB		 1519 start = vxlan_rco_start(unparsed->vx_vni);
1520 offset = start + vxlan_rco_offset(unparsed->vx_vni);
dfd8645e 1521
7d34fa75 1522 if (!pskb_may_pull(skb, offset + sizeof(u16)))
be5cfeab 1523 return false;
dfd8645e 1524
be5cfeab
JB		 1525 skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset,
1526 !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL));
f14ecebb
JB		 1527out:
1528 unparsed->vx_flags &= ~VXLAN_HF_RCO;
1529 unparsed->vx_vni &= VXLAN_VNI_MASK;
be5cfeab 1530 return true;
dfd8645e
TH		 1531}
1532
f14ecebb 1533static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed,
64f87d36 1534 struct sk_buff *skb, u32 vxflags,
10a5af23 1535 struct vxlan_metadata *md)
3288af08 1536{
f14ecebb 1537 struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed;
10a5af23 1538 struct metadata_dst *tun_dst;
f14ecebb
JB		 1539
1540 if (!(unparsed->vx_flags & VXLAN_HF_GBP))
1541 goto out;
3288af08 1542
3288af08
JB		 1543 md->gbp = ntohs(gbp->policy_id);
1544
10a5af23 1545 tun_dst = (struct metadata_dst *)skb_dst(skb);
810813c4 1546 if (tun_dst) {
3288af08 1547 tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
810813c4
DM		 1548 tun_dst->u.tun_info.options_len = sizeof(*md);
1549 }
3288af08
JB		 1550 if (gbp->dont_learn)
1551 md->gbp |= VXLAN_GBP_DONT_LEARN;
1552
1553 if (gbp->policy_applied)
1554 md->gbp |= VXLAN_GBP_POLICY_APPLIED;
f14ecebb 1555
64f87d36
JB		 1556 /* In flow-based mode, GBP is carried in dst_metadata */
1557 if (!(vxflags & VXLAN_F_COLLECT_METADATA))
1558 skb->mark = md->gbp;
f14ecebb
JB		 1559out:
1560 unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
3288af08
JB		 1561}
1562
e1e5314d 1563static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed,
61618eea 1564 __be16 *protocol,
e1e5314d
JB		 1565 struct sk_buff *skb, u32 vxflags)
1566{
1567 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed;
1568
1569 /* Need to have Next Protocol set for interfaces in GPE mode. */
1570 if (!gpe->np_applied)
1571 return false;
1572 /* "The initial version is 0. If a receiver does not support the
1573 * version indicated it MUST drop the packet.
1574 */
1575 if (gpe->version != 0)
1576 return false;
1577 /* "When the O bit is set to 1, the packet is an OAM packet and OAM
1578 * processing MUST occur." However, we don't implement OAM
1579 * processing, thus drop the packet.
1580 */
1581 if (gpe->oam_flag)
1582 return false;
1583
fa20e0e3
JB		 1584 *protocol = tun_p_to_eth_p(gpe->next_protocol);
1585 if (!*protocol)
e1e5314d 1586 return false;
e1e5314d
JB		 1587
1588 unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS;
1589 return true;
1590}
1591
1ab016e2
JB		 1592static bool vxlan_set_mac(struct vxlan_dev *vxlan,
1593 struct vxlan_sock *vs,
3ad7a4b1 1594 struct sk_buff *skb, __be32 vni)
614732ea 1595{
614732ea 1596 union vxlan_addr saddr;
87613de9 1597 u32 ifindex = skb->dev->ifindex;
614732ea 1598
614732ea 1599 skb_reset_mac_header(skb);
614732ea
TG		 1600 skb->protocol = eth_type_trans(skb, vxlan->dev);
1601 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
1602
1603 /* Ignore packet loops (and multicast echo) */
1604 if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
1ab016e2 1605 return false;
614732ea 1606
760c6805 1607 /* Get address from the outer IP header */
ce212d0f 1608 if (vxlan_get_sk_family(vs) == AF_INET) {
1ab016e2 1609 saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
614732ea
TG		 1610 saddr.sa.sa_family = AF_INET;
1611#if IS_ENABLED(CONFIG_IPV6)
1612 } else {
1ab016e2 1613 saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
614732ea
TG		 1614 saddr.sa.sa_family = AF_INET6;
1615#endif
1616 }
1617
dc5321d7 1618 if ((vxlan->cfg.flags & VXLAN_F_LEARN) &&
87613de9 1619 vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni))
1ab016e2
JB		 1620 return false;
1621
1622 return true;
1623}
1624
760c6805
JB		 1625static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph,
1626 struct sk_buff *skb)
1627{
1628 int err = 0;
1629
1630 if (vxlan_get_sk_family(vs) == AF_INET)
1631 err = IP_ECN_decapsulate(oiph, skb);
1632#if IS_ENABLED(CONFIG_IPV6)
1633 else
1634 err = IP6_ECN_decapsulate(oiph, skb);
1635#endif
1636
1637 if (unlikely(err) && log_ecn_error) {
1638 if (vxlan_get_sk_family(vs) == AF_INET)
1639 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
1640 &((struct iphdr *)oiph)->saddr,
1641 ((struct iphdr *)oiph)->tos);
1642 else
1643 net_info_ratelimited("non-ECT from %pI6\n",
1644 &((struct ipv6hdr *)oiph)->saddr);
1645 }
1646 return err <= 1;
1647}
1648
d342894c 1649/* Callback from net/ipv4/udp.c to receive packets */
f2d1968e 1650static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
d342894c 1651{
f2d1968e 1652 struct pcpu_sw_netstats *stats;
c9e78efb 1653 struct vxlan_dev *vxlan;
5cfccc5a 1654 struct vxlan_sock *vs;
f14ecebb 1655 struct vxlanhdr unparsed;
ee122c79
TG		 1656 struct vxlan_metadata _md;
1657 struct vxlan_metadata *md = &_md;
61618eea 1658 __be16 protocol = htons(ETH_P_TEB);
e1e5314d 1659 bool raw_proto = false;
f2d1968e 1660 void *oiph;
3ad7a4b1 1661 __be32 vni = 0;
d342894c 1662
e1e5314d 1663 /* Need UDP and VXLAN header to be present */
7ce04758 1664 if (!pskb_may_pull(skb, VXLAN_HLEN))
e5aed006 1665 goto drop;
d342894c 1666
f14ecebb 1667 unparsed = *vxlan_hdr(skb);
288b01c8
JB		 1668 /* VNI flag always required to be set */
1669 if (!(unparsed.vx_flags & VXLAN_HF_VNI)) {
1670 netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
1671 ntohl(vxlan_hdr(skb)->vx_flags),
1672 ntohl(vxlan_hdr(skb)->vx_vni));
1673 /* Return non vxlan pkt */
e5aed006 1674 goto drop;
d342894c 1675 }
288b01c8
JB		 1676 unparsed.vx_flags &= ~VXLAN_HF_VNI;
1677 unparsed.vx_vni &= ~VXLAN_VNI_MASK;
d342894c 1678
559835ea 1679 vs = rcu_dereference_sk_user_data(sk);
5cfccc5a 1680 if (!vs)
d342894c 1681 goto drop;
d342894c 1682
3ad7a4b1
RP		 1683 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);
1684
49f810f0 1685 vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni);
c9e78efb
JB		 1686 if (!vxlan)
1687 goto drop;
1688
e1e5314d
JB		 1689 /* For backwards compatibility, only allow reserved fields to be
1690 * used by VXLAN extensions if explicitly requested.
1691 */
1692 if (vs->flags & VXLAN_F_GPE) {
1693 if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags))
1694 goto drop;
1695 raw_proto = true;
1696 }
1697
1698 if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto,
1699 !net_eq(vxlan->net, dev_net(vxlan->dev))))
1700 goto drop;
c9e78efb 1701
ee122c79 1702 if (vxlan_collect_metadata(vs)) {
10a5af23 1703 struct metadata_dst *tun_dst;
07dabf20 1704
c29a70d2 1705 tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
d817f432 1706 key32_to_tunnel_id(vni), sizeof(*md));
c29a70d2 1707
ee122c79
TG		 1708 if (!tun_dst)
1709 goto drop;
1710
0f1b7354 1711 md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
10a5af23
JB		 1712
1713 skb_dst_set(skb, (struct dst_entry *)tun_dst);
ee122c79
TG		 1714 } else {
1715 memset(md, 0, sizeof(*md));
1716 }
1717
f14ecebb
JB		 1718 if (vs->flags & VXLAN_F_REMCSUM_RX)
1719 if (!vxlan_remcsum(&unparsed, skb, vs->flags))
1720 goto drop;
1721 if (vs->flags & VXLAN_F_GBP)
10a5af23 1722 vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md);
e1e5314d
JB		 1723 /* Note that GBP and GPE can never be active together. This is
1724 * ensured in vxlan_dev_configure.
1725 */
3511494c 1726
f14ecebb 1727 if (unparsed.vx_flags || unparsed.vx_vni) {
3bf39475
TH		 1728 /* If there are any unprocessed flags remaining treat
1729 * this as a malformed packet. This behavior diverges from
1730 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
1731 * in reserved fields are to be ignored. The approach here
c4b49512 1732 * maintains compatibility with previous stack code, and also
3bf39475
TH		 1733 * is more robust and provides a little more security in
1734 * adding extensions to VXLAN.
1735 */
288b01c8 1736 goto drop;
3bf39475
TH		 1737 }
1738
e1e5314d 1739 if (!raw_proto) {
3ad7a4b1 1740 if (!vxlan_set_mac(vxlan, vs, skb, vni))
e1e5314d
JB		 1741 goto drop;
1742 } else {
8be0cfa4 1743 skb_reset_mac_header(skb);
e1e5314d
JB		 1744 skb->dev = vxlan->dev;
1745 skb->pkt_type = PACKET_HOST;
1746 }
f2d1968e 1747
f2d1968e
JB		 1748 oiph = skb_network_header(skb);
1749 skb_reset_network_header(skb);
1750
1751 if (!vxlan_ecn_decapsulate(vs, oiph, skb)) {
1752 ++vxlan->dev->stats.rx_frame_errors;
1753 ++vxlan->dev->stats.rx_errors;
1754 goto drop;
1755 }
1756
59cbf56f
ED		 1757 rcu_read_lock();
1758
1759 if (unlikely(!(vxlan->dev->flags & IFF_UP))) {
1760 rcu_read_unlock();
1761 atomic_long_inc(&vxlan->dev->rx_dropped);
1762 goto drop;
1763 }
1764
f2d1968e
JB		 1765 stats = this_cpu_ptr(vxlan->dev->tstats);
1766 u64_stats_update_begin(&stats->syncp);
1767 stats->rx_packets++;
1768 stats->rx_bytes += skb->len;
1769 u64_stats_update_end(&stats->syncp);
1770
1771 gro_cells_receive(&vxlan->gro_cells, skb);
59cbf56f
ED		 1772
1773 rcu_read_unlock();
1774
5cfccc5a
PS		 1775 return 0;
1776
1777drop:
288b01c8
JB		 1778 /* Consume bad packet */
1779 kfree_skb(skb);
1780 return 0;
5cfccc5a
PS		 1781}
1782
c3a43b9f
SB		 1783/* Callback from net/ipv{4,6}/udp.c to check that we have a VNI for errors */
1784static int vxlan_err_lookup(struct sock *sk, struct sk_buff *skb)
1785{
1786 struct vxlan_dev *vxlan;
1787 struct vxlan_sock *vs;
1788 struct vxlanhdr *hdr;
1789 __be32 vni;
1790
8399a693 1791 if (!pskb_may_pull(skb, skb_transport_offset(skb) + VXLAN_HLEN))
c3a43b9f
SB		 1792 return -EINVAL;
1793
1794 hdr = vxlan_hdr(skb);
1795
1796 if (!(hdr->vx_flags & VXLAN_HF_VNI))
1797 return -EINVAL;
1798
1799 vs = rcu_dereference_sk_user_data(sk);
1800 if (!vs)
1801 return -ENOENT;
1802
1803 vni = vxlan_vni(hdr->vx_vni);
1804 vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni);
1805 if (!vxlan)
1806 return -ENOENT;
1807
1808 return 0;
1809}
1810
3ad7a4b1 1811static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
e4f67add
DS		 1812{
1813 struct vxlan_dev *vxlan = netdev_priv(dev);
1814 struct arphdr *parp;
1815 u8 *arpptr, *sha;
1816 __be32 sip, tip;
1817 struct neighbour *n;
1818
1819 if (dev->flags & IFF_NOARP)
1820 goto out;
1821
1822 if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
1823 dev->stats.tx_dropped++;
1824 goto out;
1825 }
1826 parp = arp_hdr(skb);
1827
1828 if ((parp->ar_hrd != htons(ARPHRD_ETHER) &&
1829 parp->ar_hrd != htons(ARPHRD_IEEE802)) ||
1830 parp->ar_pro != htons(ETH_P_IP) ||
1831 parp->ar_op != htons(ARPOP_REQUEST) ||
1832 parp->ar_hln != dev->addr_len ||
1833 parp->ar_pln != 4)
1834 goto out;
1835 arpptr = (u8 *)parp + sizeof(struct arphdr);
1836 sha = arpptr;
1837 arpptr += dev->addr_len; /* sha */
1838 memcpy(&sip, arpptr, sizeof(sip));
1839 arpptr += sizeof(sip);
1840 arpptr += dev->addr_len; /* tha */
1841 memcpy(&tip, arpptr, sizeof(tip));
1842
1843 if (ipv4_is_loopback(tip) ||
1844 ipv4_is_multicast(tip))
1845 goto out;
1846
1847 n = neigh_lookup(&arp_tbl, &tip, dev);
1848
1849 if (n) {
e4f67add
DS		 1850 struct vxlan_fdb *f;
1851 struct sk_buff *reply;
1852
1853 if (!(n->nud_state & NUD_CONNECTED)) {
1854 neigh_release(n);
1855 goto out;
1856 }
1857
3ad7a4b1 1858 f = vxlan_find_mac(vxlan, n->ha, vni);
e4c7ed41 1859 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
e4f67add
DS		 1860 /* bridge-local neighbor */
1861 neigh_release(n);
1862 goto out;
1863 }
1864
1865 reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
1866 n->ha, sha);
1867
1868 neigh_release(n);
1869
7346135d
DS		 1870 if (reply == NULL)
1871 goto out;
1872
e4f67add
DS		 1873 skb_reset_mac_header(reply);
1874 __skb_pull(reply, skb_network_offset(reply));
1875 reply->ip_summed = CHECKSUM_UNNECESSARY;
1876 reply->pkt_type = PACKET_HOST;
1877
1878 if (netif_rx_ni(reply) == NET_RX_DROP)
1879 dev->stats.rx_dropped++;
dc5321d7 1880 } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) {
e4c7ed41
CW		 1881 union vxlan_addr ipa = {
1882 .sin.sin_addr.s_addr = tip,
a45e92a5 1883 .sin.sin_family = AF_INET,
e4c7ed41
CW		 1884 };
1885
1886 vxlan_ip_miss(dev, &ipa);
1887 }
e4f67add
DS		 1888out:
1889 consume_skb(skb);
1890 return NETDEV_TX_OK;
1891}
1892
f564f45c 1893#if IS_ENABLED(CONFIG_IPV6)
4b29dba9
DS		 1894static struct sk_buff *vxlan_na_create(struct sk_buff *request,
1895 struct neighbour *n, bool isrouter)
1896{
1897 struct net_device *dev = request->dev;
1898 struct sk_buff *reply;
1899 struct nd_msg *ns, *na;
1900 struct ipv6hdr *pip6;
1901 u8 *daddr;
1902 int na_olen = 8; /* opt hdr + ETH_ALEN for target */
1903 int ns_olen;
1904 int i, len;
1905
f1fb08f6 1906 if (dev == NULL || !pskb_may_pull(request, request->len))
4b29dba9
DS		 1907 return NULL;
1908
1909 len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) +
1910 sizeof(*na) + na_olen + dev->needed_tailroom;
1911 reply = alloc_skb(len, GFP_ATOMIC);
1912 if (reply == NULL)
1913 return NULL;
1914
1915 reply->protocol = htons(ETH_P_IPV6);
1916 reply->dev = dev;
1917 skb_reserve(reply, LL_RESERVED_SPACE(request->dev));
1918 skb_push(reply, sizeof(struct ethhdr));
6297b91c 1919 skb_reset_mac_header(reply);
4b29dba9 1920
f1fb08f6 1921 ns = (struct nd_msg *)(ipv6_hdr(request) + 1);
4b29dba9
DS		 1922
1923 daddr = eth_hdr(request)->h_source;
f1fb08f6
VB		 1924 ns_olen = request->len - skb_network_offset(request) -
1925 sizeof(struct ipv6hdr) - sizeof(*ns);
4b29dba9
DS		 1926 for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) {
1927 if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {
1928 daddr = ns->opt + i + sizeof(struct nd_opt_hdr);
1929 break;
1930 }
1931 }
1932
1933 /* Ethernet header */
1934 ether_addr_copy(eth_hdr(reply)->h_dest, daddr);
1935 ether_addr_copy(eth_hdr(reply)->h_source, n->ha);
1936 eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);
1937 reply->protocol = htons(ETH_P_IPV6);
1938
1939 skb_pull(reply, sizeof(struct ethhdr));
6297b91c 1940 skb_reset_network_header(reply);
4b29dba9
DS		 1941 skb_put(reply, sizeof(struct ipv6hdr));
1942
1943 /* IPv6 header */
1944
1945 pip6 = ipv6_hdr(reply);
1946 memset(pip6, 0, sizeof(struct ipv6hdr));
1947 pip6->version = 6;
1948 pip6->priority = ipv6_hdr(request)->priority;
1949 pip6->nexthdr = IPPROTO_ICMPV6;
1950 pip6->hop_limit = 255;
1951 pip6->daddr = ipv6_hdr(request)->saddr;
1952 pip6->saddr = *(struct in6_addr *)n->primary_key;
1953
1954 skb_pull(reply, sizeof(struct ipv6hdr));
6297b91c 1955 skb_reset_transport_header(reply);
4b29dba9 1956
4b29dba9 1957 /* Neighbor Advertisement */
b080db58 1958 na = skb_put_zero(reply, sizeof(*na) + na_olen);
4b29dba9
DS		 1959 na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
1960 na->icmph.icmp6_router = isrouter;
1961 na->icmph.icmp6_override = 1;
1962 na->icmph.icmp6_solicited = 1;
1963 na->target = ns->target;
1964 ether_addr_copy(&na->opt[2], n->ha);
1965 na->opt[0] = ND_OPT_TARGET_LL_ADDR;
1966 na->opt[1] = na_olen >> 3;
1967
1968 na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,
1969 &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6,
1970 csum_partial(na, sizeof(*na)+na_olen, 0));
1971
1972 pip6->payload_len = htons(sizeof(*na)+na_olen);
1973
1974 skb_push(reply, sizeof(struct ipv6hdr));
1975
1976 reply->ip_summed = CHECKSUM_UNNECESSARY;
1977
1978 return reply;
1979}
1980
3ad7a4b1 1981static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
f564f45c
CW		 1982{
1983 struct vxlan_dev *vxlan = netdev_priv(dev);
8dcd81a9 1984 const struct in6_addr *daddr;
8bff3685 1985 const struct ipv6hdr *iphdr;
4b29dba9 1986 struct inet6_dev *in6_dev;
8bff3685
XL		 1987 struct neighbour *n;
1988 struct nd_msg *msg;
f564f45c
CW		 1989
1990 in6_dev = __in6_dev_get(dev);
1991 if (!in6_dev)
1992 goto out;
1993
f564f45c 1994 iphdr = ipv6_hdr(skb);
f564f45c 1995 daddr = &iphdr->daddr;
f1fb08f6 1996 msg = (struct nd_msg *)(iphdr + 1);
f564f45c 1997
4b29dba9
DS		 1998 if (ipv6_addr_loopback(daddr) ||
1999 ipv6_addr_is_multicast(&msg->target))
2000 goto out;
2001
2002 n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev);
f564f45c
CW		 2003
2004 if (n) {
2005 struct vxlan_fdb *f;
4b29dba9 2006 struct sk_buff *reply;
f564f45c
CW		 2007
2008 if (!(n->nud_state & NUD_CONNECTED)) {
2009 neigh_release(n);
2010 goto out;
2011 }
2012
3ad7a4b1 2013 f = vxlan_find_mac(vxlan, n->ha, vni);
f564f45c
CW		 2014 if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) {
2015 /* bridge-local neighbor */
2016 neigh_release(n);
2017 goto out;
2018 }
2019
4b29dba9
DS		 2020 reply = vxlan_na_create(skb, n,
2021 !!(f ? f->flags & NTF_ROUTER : 0));
2022
f564f45c 2023 neigh_release(n);
4b29dba9
DS		 2024
2025 if (reply == NULL)
2026 goto out;
2027
2028 if (netif_rx_ni(reply) == NET_RX_DROP)
2029 dev->stats.rx_dropped++;
2030
dc5321d7 2031 } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) {
4b29dba9
DS		 2032 union vxlan_addr ipa = {
2033 .sin6.sin6_addr = msg->target,
a45e92a5 2034 .sin6.sin6_family = AF_INET6,
4b29dba9
DS		 2035 };
2036
f564f45c
CW		 2037 vxlan_ip_miss(dev, &ipa);
2038 }
2039
2040out:
2041 consume_skb(skb);
2042 return NETDEV_TX_OK;
2043}
2044#endif
2045
e4f67add
DS		 2046static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
2047{
2048 struct vxlan_dev *vxlan = netdev_priv(dev);
2049 struct neighbour *n;
e4f67add
DS		 2050
2051 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
2052 return false;
2053
2054 n = NULL;
2055 switch (ntohs(eth_hdr(skb)->h_proto)) {
2056 case ETH_P_IP:
e15a00aa
CW		 2057 {
2058 struct iphdr *pip;
2059
e4f67add
DS		 2060 if (!pskb_may_pull(skb, sizeof(struct iphdr)))
2061 return false;
2062 pip = ip_hdr(skb);
2063 n = neigh_lookup(&arp_tbl, &pip->daddr, dev);
dc5321d7 2064 if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) {
e4c7ed41
CW		 2065 union vxlan_addr ipa = {
2066 .sin.sin_addr.s_addr = pip->daddr,
a45e92a5 2067 .sin.sin_family = AF_INET,
e4c7ed41
CW		 2068 };
2069
2070 vxlan_ip_miss(dev, &ipa);
2071 return false;
2072 }
2073
e4f67add 2074 break;
e15a00aa
CW		 2075 }
2076#if IS_ENABLED(CONFIG_IPV6)
2077 case ETH_P_IPV6:
2078 {
2079 struct ipv6hdr *pip6;
2080
2081 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
2082 return false;
2083 pip6 = ipv6_hdr(skb);
2084 n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev);
dc5321d7 2085 if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) {
e15a00aa
CW		 2086 union vxlan_addr ipa = {
2087 .sin6.sin6_addr = pip6->daddr,
a45e92a5 2088 .sin6.sin6_family = AF_INET6,
e15a00aa
CW		 2089 };
2090
2091 vxlan_ip_miss(dev, &ipa);
2092 return false;
2093 }
2094
2095 break;
2096 }
2097#endif
e4f67add
DS		 2098 default:
2099 return false;
2100 }
2101
2102 if (n) {
2103 bool diff;
2104
7367d0b5 2105 diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha);
e4f67add
DS		 2106 if (diff) {
2107 memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
2108 dev->addr_len);
2109 memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len);
2110 }
2111 neigh_release(n);
2112 return diff;
e4c7ed41
CW		 2113 }
2114
e4f67add
DS		 2115 return false;
2116}
2117
af33c1ad 2118static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
3511494c
TG		 2119 struct vxlan_metadata *md)
2120{
2121 struct vxlanhdr_gbp *gbp;
2122
db79a621
TG		 2123 if (!md->gbp)
2124 return;
2125
3511494c 2126 gbp = (struct vxlanhdr_gbp *)vxh;
54bfd872 2127 vxh->vx_flags |= VXLAN_HF_GBP;
3511494c
TG		 2128
2129 if (md->gbp & VXLAN_GBP_DONT_LEARN)
2130 gbp->dont_learn = 1;
2131
2132 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
2133 gbp->policy_applied = 1;
2134
2135 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
2136}
2137
e1e5314d
JB		 2138static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags,
2139 __be16 protocol)
2140{
2141 struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh;
2142
2143 gpe->np_applied = 1;
fa20e0e3
JB		 2144 gpe->next_protocol = tun_p_from_eth_p(protocol);
2145 if (!gpe->next_protocol)
2146 return -EPFNOSUPPORT;
2147 return 0;
e1e5314d
JB		 2148}
2149
f491e56d
JB		 2150static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
2151 int iphdr_len, __be32 vni,
2152 struct vxlan_metadata *md, u32 vxflags,
b4ed5cad 2153 bool udp_sum)
e4c7ed41 2154{
e4c7ed41 2155 struct vxlanhdr *vxh;
e4c7ed41
CW		 2156 int min_headroom;
2157 int err;
dfd8645e 2158 int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
e1e5314d 2159 __be16 inner_protocol = htons(ETH_P_TEB);
dfd8645e 2160
af33c1ad 2161 if ((vxflags & VXLAN_F_REMCSUM_TX) &&
dfd8645e
TH		 2162 skb->ip_summed == CHECKSUM_PARTIAL) {
2163 int csum_start = skb_checksum_start_offset(skb);
2164
2165 if (csum_start <= VXLAN_MAX_REMCSUM_START &&
2166 !(csum_start & VXLAN_RCO_SHIFT_MASK) &&
2167 (skb->csum_offset == offsetof(struct udphdr, check) ||
b5708501 2168 skb->csum_offset == offsetof(struct tcphdr, check)))
dfd8645e 2169 type |= SKB_GSO_TUNNEL_REMCSUM;
dfd8645e 2170 }
e4c7ed41 2171
e4c7ed41 2172 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len
4a4f86cc 2173 + VXLAN_HLEN + iphdr_len;
649c5b8b
PS		 2174
2175 /* Need space for new headers (invalidates iph ptr) */
2176 err = skb_cow_head(skb, min_headroom);
e1e5314d 2177 if (unlikely(err))
c46b7897 2178 return err;
649c5b8b 2179
aed069df
AD		 2180 err = iptunnel_handle_offloads(skb, type);
2181 if (err)
c46b7897 2182 return err;
b736a623 2183
d58ff351 2184 vxh = __skb_push(skb, sizeof(*vxh));
54bfd872
JB		 2185 vxh->vx_flags = VXLAN_HF_VNI;
2186 vxh->vx_vni = vxlan_vni_field(vni);
49560532 2187
dfd8645e 2188 if (type & SKB_GSO_TUNNEL_REMCSUM) {
54bfd872 2189 unsigned int start;
dfd8645e 2190
54bfd872
JB		 2191 start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr);
2192 vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset);
2193 vxh->vx_flags |= VXLAN_HF_RCO;
dfd8645e
TH		 2194
2195 if (!skb_is_gso(skb)) {
2196 skb->ip_summed = CHECKSUM_NONE;
2197 skb->encapsulation = 0;
2198 }
2199 }
2200
af33c1ad
TH		 2201 if (vxflags & VXLAN_F_GBP)
2202 vxlan_build_gbp_hdr(vxh, vxflags, md);
e1e5314d
JB		 2203 if (vxflags & VXLAN_F_GPE) {
2204 err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol);
2205 if (err < 0)
c46b7897 2206 return err;
e1e5314d
JB		 2207 inner_protocol = skb->protocol;
2208 }
3511494c 2209
e1e5314d 2210 skb_set_inner_protocol(skb, inner_protocol);
039f5062 2211 return 0;
49560532 2212}
49560532 2213
655c3de1 2214static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev,
2215 struct vxlan_sock *sock4,
1a8496ba 2216 struct sk_buff *skb, int oif, u8 tos,
4ecb1d83 2217 __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport,
0c1d70af 2218 struct dst_cache *dst_cache,
db3c6139 2219 const struct ip_tunnel_info *info)
1a8496ba 2220{
db3c6139 2221 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
1a8496ba
JB		 2222 struct rtable *rt = NULL;
2223 struct flowi4 fl4;
2224
655c3de1 2225 if (!sock4)
2226 return ERR_PTR(-EIO);
2227
db3c6139
DB		 2228 if (tos && !info)
2229 use_cache = false;
2230 if (use_cache) {
0c1d70af
PA		 2231 rt = dst_cache_get_ip4(dst_cache, saddr);
2232 if (rt)
2233 return rt;
2234 }
2235
1a8496ba
JB		 2236 memset(&fl4, 0, sizeof(fl4));
2237 fl4.flowi4_oif = oif;
2238 fl4.flowi4_tos = RT_TOS(tos);
2239 fl4.flowi4_mark = skb->mark;
2240 fl4.flowi4_proto = IPPROTO_UDP;
2241 fl4.daddr = daddr;
272d96a5 2242 fl4.saddr = *saddr;
4ecb1d83
MP		 2243 fl4.fl4_dport = dport;
2244 fl4.fl4_sport = sport;
1a8496ba
JB		 2245
2246 rt = ip_route_output_key(vxlan->net, &fl4);
478db1f1 2247 if (!IS_ERR(rt)) {
655c3de1 2248 if (rt->dst.dev == dev) {
2249 netdev_dbg(dev, "circular route to %pI4\n", &daddr);
2250 ip_rt_put(rt);
2251 return ERR_PTR(-ELOOP);
2252 }
2253
1a8496ba 2254 *saddr = fl4.saddr;
0c1d70af
PA		 2255 if (use_cache)
2256 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr);
655c3de1 2257 } else {
2258 netdev_dbg(dev, "no route to %pI4\n", &daddr);
2259 return ERR_PTR(-ENETUNREACH);
0c1d70af 2260 }
1a8496ba
JB		 2261 return rt;
2262}
2263
e5d4b29f
JB		 2264#if IS_ENABLED(CONFIG_IPV6)
2265static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
655c3de1 2266 struct net_device *dev,
03dc52a8 2267 struct vxlan_sock *sock6,
1400615d 2268 struct sk_buff *skb, int oif, u8 tos,
e7f70af1 2269 __be32 label,
e5d4b29f 2270 const struct in6_addr *daddr,
0c1d70af 2271 struct in6_addr *saddr,
4ecb1d83 2272 __be16 dport, __be16 sport,
db3c6139
DB		 2273 struct dst_cache *dst_cache,
2274 const struct ip_tunnel_info *info)
e5d4b29f 2275{
db3c6139 2276 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
e5d4b29f
JB		 2277 struct dst_entry *ndst;
2278 struct flowi6 fl6;
2279 int err;
2280
c6fcc4fc 2281 if (!sock6)
2282 return ERR_PTR(-EIO);
2283
1400615d
DB		 2284 if (tos && !info)
2285 use_cache = false;
db3c6139 2286 if (use_cache) {
0c1d70af
PA		 2287 ndst = dst_cache_get_ip6(dst_cache, saddr);
2288 if (ndst)
2289 return ndst;
2290 }
2291
e5d4b29f
JB		 2292 memset(&fl6, 0, sizeof(fl6));
2293 fl6.flowi6_oif = oif;
2294 fl6.daddr = *daddr;
272d96a5 2295 fl6.saddr = *saddr;
eaa93bf4 2296 fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label);
e5d4b29f
JB		 2297 fl6.flowi6_mark = skb->mark;
2298 fl6.flowi6_proto = IPPROTO_UDP;
4ecb1d83
MP		 2299 fl6.fl6_dport = dport;
2300 fl6.fl6_sport = sport;
e5d4b29f
JB		 2301
2302 err = ipv6_stub->ipv6_dst_lookup(vxlan->net,
c6fcc4fc 2303 sock6->sock->sk,
e5d4b29f 2304 &ndst, &fl6);
655c3de1 2305 if (unlikely(err < 0)) {
2306 netdev_dbg(dev, "no route to %pI6\n", daddr);
2307 return ERR_PTR(-ENETUNREACH);
2308 }
2309
2310 if (unlikely(ndst->dev == dev)) {
2311 netdev_dbg(dev, "circular route to %pI6\n", daddr);
2312 dst_release(ndst);
2313 return ERR_PTR(-ELOOP);
2314 }
e5d4b29f
JB		 2315
2316 *saddr = fl6.saddr;
db3c6139 2317 if (use_cache)
0c1d70af 2318 dst_cache_set_ip6(dst_cache, ndst, saddr);
e5d4b29f
JB		 2319 return ndst;
2320}
2321#endif
2322
9dcc71e1
SS		 2323/* Bypass encapsulation if the destination is local */
2324static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
3ad7a4b1 2325 struct vxlan_dev *dst_vxlan, __be32 vni)
9dcc71e1 2326{
8f84985f 2327 struct pcpu_sw_netstats *tx_stats, *rx_stats;
e4c7ed41
CW		 2328 union vxlan_addr loopback;
2329 union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
4179cb5a 2330 struct net_device *dev;
ce6502a8 2331 int len = skb->len;
9dcc71e1 2332
8f84985f
LR		 2333 tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
2334 rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
9dcc71e1
SS		 2335 skb->pkt_type = PACKET_HOST;
2336 skb->encapsulation = 0;
2337 skb->dev = dst_vxlan->dev;
2338 __skb_pull(skb, skb_network_offset(skb));
2339
e4c7ed41
CW		 2340 if (remote_ip->sa.sa_family == AF_INET) {
2341 loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2342 loopback.sa.sa_family = AF_INET;
2343#if IS_ENABLED(CONFIG_IPV6)
2344 } else {
2345 loopback.sin6.sin6_addr = in6addr_loopback;
2346 loopback.sa.sa_family = AF_INET6;
2347#endif
2348 }
2349
4179cb5a
ED		 2350 rcu_read_lock();
2351 dev = skb->dev;
2352 if (unlikely(!(dev->flags & IFF_UP))) {
2353 kfree_skb(skb);
2354 goto drop;
2355 }
2356
dc5321d7 2357 if (dst_vxlan->cfg.flags & VXLAN_F_LEARN)
4179cb5a 2358 vxlan_snoop(dev, &loopback, eth_hdr(skb)->h_source, 0, vni);
9dcc71e1
SS		 2359
2360 u64_stats_update_begin(&tx_stats->syncp);
2361 tx_stats->tx_packets++;
ce6502a8 2362 tx_stats->tx_bytes += len;
9dcc71e1
SS		 2363 u64_stats_update_end(&tx_stats->syncp);
2364
2365 if (netif_rx(skb) == NET_RX_SUCCESS) {
2366 u64_stats_update_begin(&rx_stats->syncp);
2367 rx_stats->rx_packets++;
ce6502a8 2368 rx_stats->rx_bytes += len;
9dcc71e1
SS		 2369 u64_stats_update_end(&rx_stats->syncp);
2370 } else {
4179cb5a 2371drop:
ce6502a8 2372 dev->stats.rx_dropped++;
9dcc71e1 2373 }
4179cb5a 2374 rcu_read_unlock();
9dcc71e1
SS		 2375}
2376
fee1fad7 2377static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev,
49f810f0
MS		 2378 struct vxlan_dev *vxlan,
2379 union vxlan_addr *daddr,
2380 __be16 dst_port, int dst_ifindex, __be32 vni,
2381 struct dst_entry *dst,
fee1fad7 2382 u32 rt_flags)
2383{
2384#if IS_ENABLED(CONFIG_IPV6)
2385 /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of
2386 * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple
2387 * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry.
2388 */
2389 BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL);
2390#endif
2391 /* Bypass encapsulation if the destination is local */
2392 if (rt_flags & RTCF_LOCAL &&
2393 !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {
2394 struct vxlan_dev *dst_vxlan;
2395
2396 dst_release(dst);
49f810f0 2397 dst_vxlan = vxlan_find_vni(vxlan->net, dst_ifindex, vni,
fee1fad7 2398 daddr->sa.sa_family, dst_port,
dc5321d7 2399 vxlan->cfg.flags);
fee1fad7 2400 if (!dst_vxlan) {
2401 dev->stats.tx_errors++;
2402 kfree_skb(skb);
2403
2404 return -ENOENT;
2405 }
3ad7a4b1 2406 vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni);
fee1fad7 2407 return 1;
2408 }
2409
2410 return 0;
2411}
2412
4ad16930 2413static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
3ad7a4b1
RP		 2414 __be32 default_vni, struct vxlan_rdst *rdst,
2415 bool did_rsc)
d342894c 2416{
d71785ff 2417 struct dst_cache *dst_cache;
3093fbe7 2418 struct ip_tunnel_info *info;
d342894c 2419 struct vxlan_dev *vxlan = netdev_priv(dev);
0770b53b 2420 const struct iphdr *old_iph = ip_hdr(skb);
e4c7ed41 2421 union vxlan_addr *dst;
272d96a5 2422 union vxlan_addr remote_ip, local_ip;
ee122c79
TG		 2423 struct vxlan_metadata _md;
2424 struct vxlan_metadata *md = &_md;
e4c7ed41 2425 __be16 src_port = 0, dst_port;
655c3de1 2426 struct dst_entry *ndst = NULL;
e7f70af1 2427 __be32 vni, label;
d342894c 2428 __u8 tos, ttl;
49f810f0 2429 int ifindex;
0e6fbc5b 2430 int err;
dc5321d7 2431 u32 flags = vxlan->cfg.flags;
b4ed5cad 2432 bool udp_sum = false;
f491e56d 2433 bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
d342894c 2434
61adedf3 2435 info = skb_tunnel_info(skb);
3093fbe7 2436
ee122c79 2437 if (rdst) {
0770b53b 2438 dst = &rdst->remote_ip;
2439 if (vxlan_addr_any(dst)) {
2440 if (did_rsc) {
2441 /* short-circuited back to local bridge */
3ad7a4b1 2442 vxlan_encap_bypass(skb, vxlan, vxlan, default_vni);
0770b53b 2443 return;
2444 }
2445 goto drop;
2446 }
2447
0dfbdf41 2448 dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port;
3ad7a4b1 2449 vni = (rdst->remote_vni) ? : default_vni;
49f810f0 2450 ifindex = rdst->remote_ifindex;
1158632b 2451 local_ip = vxlan->cfg.saddr;
d71785ff 2452 dst_cache = &rdst->dst_cache;
0770b53b 2453 md->gbp = skb->mark;
72f6d71e
HL		 2454 if (flags & VXLAN_F_TTL_INHERIT) {
2455 ttl = ip_tunnel_get_ttl(old_iph, skb);
2456 } else {
2457 ttl = vxlan->cfg.ttl;
2458 if (!ttl && vxlan_addr_multicast(dst))
2459 ttl = 1;
2460 }
0770b53b 2461
2462 tos = vxlan->cfg.tos;
2463 if (tos == 1)
2464 tos = ip_tunnel_get_dsfield(old_iph, skb);
2465
2466 if (dst->sa.sa_family == AF_INET)
2467 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
2468 else
2469 udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
2470 label = vxlan->cfg.label;
ee122c79
TG		 2471 } else {
2472 if (!info) {
2473 WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
2474 dev->name);
2475 goto drop;
2476 }
b1be00a6 2477 remote_ip.sa.sa_family = ip_tunnel_info_af(info);
272d96a5 2478 if (remote_ip.sa.sa_family == AF_INET) {
a725e514 2479 remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
272d96a5 2480 local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src;
2481 } else {
a725e514 2482 remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;
272d96a5 2483 local_ip.sin6.sin6_addr = info->key.u.ipv6.src;
2484 }
ee122c79 2485 dst = &remote_ip;
0770b53b 2486 dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
2487 vni = tunnel_id_to_key32(info->key.tun_id);
49f810f0 2488 ifindex = 0;
d71785ff 2489 dst_cache = &info->dst_cache;
eadf52cf
XL		 2490 if (info->key.tun_flags & TUNNEL_VXLAN_OPT) {
2491 if (info->options_len < sizeof(*md))
2492 goto drop;
0770b53b 2493 md = ip_tunnel_info_opts(info);
eadf52cf 2494 }
a725e514
JB		 2495 ttl = info->key.ttl;
2496 tos = info->key.tos;
e7f70af1 2497 label = info->key.label;
b4ed5cad 2498 udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
a725e514 2499 }
0770b53b 2500 src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2501 vxlan->cfg.port_max, true);
a725e514 2502
56de859e 2503 rcu_read_lock();
e4c7ed41 2504 if (dst->sa.sa_family == AF_INET) {
c6fcc4fc 2505 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
c46b7897 2506 struct rtable *rt;
0770b53b 2507 __be16 df = 0;
c6fcc4fc 2508
aab8cc36
AB		 2509 if (!ifindex)
2510 ifindex = sock4->sock->sk->sk_bound_dev_if;
2511
49f810f0 2512 rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos,
272d96a5 2513 dst->sin.sin_addr.s_addr,
1158632b 2514 &local_ip.sin.sin_addr.s_addr,
4ecb1d83 2515 dst_port, src_port,
d71785ff 2516 dst_cache, info);
8ebd115b
DM		 2517 if (IS_ERR(rt)) {
2518 err = PTR_ERR(rt);
c46b7897 2519 goto tx_error;
8ebd115b 2520 }
e4c7ed41 2521
fee1fad7 2522 if (!info) {
b4d30697 2523 /* Bypass encapsulation if the destination is local */
fee1fad7 2524 err = encap_bypass_if_local(skb, dev, vxlan, dst,
49f810f0
MS		 2525 dst_port, ifindex, vni,
2526 &rt->dst, rt->rt_flags);
fee1fad7 2527 if (err)
56de859e 2528 goto out_unlock;
b4d30697
SB		 2529
2530 if (vxlan->cfg.df == VXLAN_DF_SET) {
2531 df = htons(IP_DF);
2532 } else if (vxlan->cfg.df == VXLAN_DF_INHERIT) {
2533 struct ethhdr *eth = eth_hdr(skb);
2534
2535 if (ntohs(eth->h_proto) == ETH_P_IPV6 ||
2536 (ntohs(eth->h_proto) == ETH_P_IP &&
2537 old_iph->frag_off & htons(IP_DF)))
2538 df = htons(IP_DF);
2539 }
fee1fad7 2540 } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) {
6ceb31ca 2541 df = htons(IP_DF);
fee1fad7 2542 }
6ceb31ca 2543
c46b7897 2544 ndst = &rt->dst;
6b4f92af 2545 skb_tunnel_check_pmtu(skb, ndst, VXLAN_HEADROOM);
a93bf0ff 2546
e4c7ed41
CW		 2547 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
2548 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
c46b7897 2549 err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr),
54bfd872 2550 vni, md, flags, udp_sum);
f491e56d 2551 if (err < 0)
c46b7897 2552 goto tx_error;
f491e56d 2553
1158632b 2554 udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr,
f491e56d
JB		 2555 dst->sin.sin_addr.s_addr, tos, ttl, df,
2556 src_port, dst_port, xnet, !udp_sum);
e4c7ed41
CW		 2557#if IS_ENABLED(CONFIG_IPV6)
2558 } else {
c6fcc4fc 2559 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
e4c7ed41 2560
aab8cc36
AB		 2561 if (!ifindex)
2562 ifindex = sock6->sock->sk->sk_bound_dev_if;
2563
49f810f0 2564 ndst = vxlan6_get_route(vxlan, dev, sock6, skb, ifindex, tos,
272d96a5 2565 label, &dst->sin6.sin6_addr,
1158632b 2566 &local_ip.sin6.sin6_addr,
4ecb1d83 2567 dst_port, src_port,
db3c6139 2568 dst_cache, info);
e5d4b29f 2569 if (IS_ERR(ndst)) {
8ebd115b 2570 err = PTR_ERR(ndst);
c46b7897 2571 ndst = NULL;
9dcc71e1 2572 goto tx_error;
e4c7ed41 2573 }
655c3de1 2574
fee1fad7 2575 if (!info) {
2576 u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
49560532 2577
fee1fad7 2578 err = encap_bypass_if_local(skb, dev, vxlan, dst,
49f810f0
MS		 2579 dst_port, ifindex, vni,
2580 ndst, rt6i_flags);
fee1fad7 2581 if (err)
56de859e 2582 goto out_unlock;
fee1fad7 2583 }
35e2d115 2584
6b4f92af 2585 skb_tunnel_check_pmtu(skb, ndst, VXLAN6_HEADROOM);
a93bf0ff 2586
1400615d 2587 tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
e4c7ed41 2588 ttl = ttl ? : ip6_dst_hoplimit(ndst);
f491e56d
JB		 2589 skb_scrub_packet(skb, xnet);
2590 err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
54bfd872 2591 vni, md, flags, udp_sum);
c46b7897 2592 if (err < 0)
2593 goto tx_error;
2594
0770b53b 2595 udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev,
1158632b 2596 &local_ip.sin6.sin6_addr,
272d96a5 2597 &dst->sin6.sin6_addr, tos, ttl,
e7f70af1 2598 label, src_port, dst_port, !udp_sum);
e4c7ed41
CW		 2599#endif
2600 }
56de859e
JK		 2601out_unlock:
2602 rcu_read_unlock();
4ad16930 2603 return;
d342894c 2604
2605drop:
2606 dev->stats.tx_dropped++;
c46b7897 2607 dev_kfree_skb(skb);
2608 return;
d342894c 2609
2610tx_error:
56de859e 2611 rcu_read_unlock();
655c3de1 2612 if (err == -ELOOP)
2613 dev->stats.collisions++;
2614 else if (err == -ENETUNREACH)
2615 dev->stats.tx_carrier_errors++;
c46b7897 2616 dst_release(ndst);
d342894c 2617 dev->stats.tx_errors++;
c46b7897 2618 kfree_skb(skb);
d342894c 2619}
2620
6681712d
DS		 2621/* Transmit local packets over Vxlan
2622 *
2623 * Outer IP header inherits ECN and DF from inner header.
2624 * Outer UDP destination is the VXLAN assigned port.
2625 * source port is based on hash of flow
2626 */
2627static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
2628{
2629 struct vxlan_dev *vxlan = netdev_priv(dev);
8bff3685 2630 struct vxlan_rdst *rdst, *fdst = NULL;
3093fbe7 2631 const struct ip_tunnel_info *info;
6681712d 2632 bool did_rsc = false;
6681712d 2633 struct vxlan_fdb *f;
8bff3685 2634 struct ethhdr *eth;
3ad7a4b1 2635 __be32 vni = 0;
6681712d 2636
61adedf3 2637 info = skb_tunnel_info(skb);
3093fbe7 2638
6681712d 2639 skb_reset_mac_header(skb);
6681712d 2640
dc5321d7 2641 if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) {
3ad7a4b1
RP		 2642 if (info && info->mode & IP_TUNNEL_INFO_BRIDGE &&
2643 info->mode & IP_TUNNEL_INFO_TX) {
2644 vni = tunnel_id_to_key32(info->key.tun_id);
2645 } else {
2646 if (info && info->mode & IP_TUNNEL_INFO_TX)
2647 vxlan_xmit_one(skb, dev, vni, NULL, false);
2648 else
2649 kfree_skb(skb);
2650 return NETDEV_TX_OK;
2651 }
47e5d1b0
JB		 2652 }
2653
dc5321d7 2654 if (vxlan->cfg.flags & VXLAN_F_PROXY) {
47e5d1b0 2655 eth = eth_hdr(skb);
f564f45c 2656 if (ntohs(eth->h_proto) == ETH_P_ARP)
3ad7a4b1 2657 return arp_reduce(dev, skb, vni);
f564f45c 2658#if IS_ENABLED(CONFIG_IPV6)
8bff3685
XL		 2659 else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
2660 pskb_may_pull(skb, sizeof(struct ipv6hdr) +
2661 sizeof(struct nd_msg)) &&
2662 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
2663 struct nd_msg *m = (struct nd_msg *)(ipv6_hdr(skb) + 1);
2664
2665 if (m->icmph.icmp6_code == 0 &&
2666 m->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
f1fb08f6 2667 return neigh_reduce(dev, skb, vni);
f564f45c
CW		 2668 }
2669#endif
2670 }
6681712d 2671
47e5d1b0 2672 eth = eth_hdr(skb);
3ad7a4b1 2673 f = vxlan_find_mac(vxlan, eth->h_dest, vni);
ae884082
DS		 2674 did_rsc = false;
2675
dc5321d7 2676 if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) &&
e15a00aa
CW		 2677 (ntohs(eth->h_proto) == ETH_P_IP ||
2678 ntohs(eth->h_proto) == ETH_P_IPV6)) {
ae884082
DS		 2679 did_rsc = route_shortcircuit(dev, skb);
2680 if (did_rsc)
3ad7a4b1 2681 f = vxlan_find_mac(vxlan, eth->h_dest, vni);
ae884082
DS		 2682 }
2683
6681712d 2684 if (f == NULL) {
3ad7a4b1 2685 f = vxlan_find_mac(vxlan, all_zeros_mac, vni);
afbd8bae 2686 if (f == NULL) {
dc5321d7 2687 if ((vxlan->cfg.flags & VXLAN_F_L2MISS) &&
afbd8bae
MR		 2688 !is_multicast_ether_addr(eth->h_dest))
2689 vxlan_fdb_miss(vxlan, eth->h_dest);
2690
2691 dev->stats.tx_dropped++;
8f646c92 2692 kfree_skb(skb);
afbd8bae
MR		 2693 return NETDEV_TX_OK;
2694 }
2695 }
6681712d 2696
afbd8bae
MR		 2697 list_for_each_entry_rcu(rdst, &f->remotes, list) {
2698 struct sk_buff *skb1;
6681712d 2699
8f646c92
ED		 2700 if (!fdst) {
2701 fdst = rdst;
2702 continue;
2703 }
afbd8bae
MR		 2704 skb1 = skb_clone(skb, GFP_ATOMIC);
2705 if (skb1)
3ad7a4b1 2706 vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc);
6681712d
DS		 2707 }
2708
8f646c92 2709 if (fdst)
3ad7a4b1 2710 vxlan_xmit_one(skb, dev, vni, fdst, did_rsc);
8f646c92
ED		 2711 else
2712 kfree_skb(skb);
4ad16930 2713 return NETDEV_TX_OK;
6681712d
DS		 2714}
2715
d342894c 2716/* Walk the forwarding table and purge stale entries */
df7e828c 2717static void vxlan_cleanup(struct timer_list *t)
d342894c 2718{
df7e828c 2719 struct vxlan_dev *vxlan = from_timer(vxlan, t, age_timer);
d342894c 2720 unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
2721 unsigned int h;
2722
2723 if (!netif_running(vxlan->dev))
2724 return;
2725
d342894c 2726 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2727 struct hlist_node *p, *n;
14e1d0fa 2728
fe1e0713 2729 spin_lock(&vxlan->hash_lock[h]);
d342894c 2730 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2731 struct vxlan_fdb *f
2732 = container_of(p, struct vxlan_fdb, hlist);
2733 unsigned long timeout;
2734
efb5f68f 2735 if (f->state & (NUD_PERMANENT | NUD_NOARP))
d342894c 2736 continue;
2737
def499c9
RP		 2738 if (f->flags & NTF_EXT_LEARNED)
2739 continue;
2740
0dfbdf41 2741 timeout = f->used + vxlan->cfg.age_interval * HZ;
d342894c 2742 if (time_before_eq(timeout, jiffies)) {
2743 netdev_dbg(vxlan->dev,
2744 "garbage collect %pM\n",
2745 f->eth_addr);
2746 f->state = NUD_STALE;
0e6160f3 2747 vxlan_fdb_destroy(vxlan, f, true, true);
d342894c 2748 } else if (time_before(timeout, next_timer))
2749 next_timer = timeout;
2750 }
fe1e0713 2751 spin_unlock(&vxlan->hash_lock[h]);
d342894c 2752 }
d342894c 2753
2754 mod_timer(&vxlan->age_timer, next_timer);
2755}
2756
a53cb29b
MB		 2757static void vxlan_vs_del_dev(struct vxlan_dev *vxlan)
2758{
2759 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
2760
2761 spin_lock(&vn->sock_lock);
69e76661
JB		 2762 hlist_del_init_rcu(&vxlan->hlist4.hlist);
2763#if IS_ENABLED(CONFIG_IPV6)
2764 hlist_del_init_rcu(&vxlan->hlist6.hlist);
2765#endif
a53cb29b
MB		 2766 spin_unlock(&vn->sock_lock);
2767}
2768
69e76661
JB		 2769static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan,
2770 struct vxlan_dev_node *node)
9c2e24e1 2771{
56ef9c90 2772 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
54bfd872 2773 __be32 vni = vxlan->default_dst.remote_vni;
9c2e24e1 2774
69e76661 2775 node->vxlan = vxlan;
56ef9c90 2776 spin_lock(&vn->sock_lock);
69e76661 2777 hlist_add_head_rcu(&node->hlist, vni_head(vs, vni));
56ef9c90 2778 spin_unlock(&vn->sock_lock);
9c2e24e1
PS		 2779}
2780
d342894c 2781/* Setup stats when device is created */
2782static int vxlan_init(struct net_device *dev)
2783{
1c213bd2 2784 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
e8171045 2785 if (!dev->tstats)
d342894c 2786 return -ENOMEM;
2787
2788 return 0;
2789}
2790
3ad7a4b1 2791static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni)
afbd8bae
MR		 2792{
2793 struct vxlan_fdb *f;
fe1e0713 2794 u32 hash_index = fdb_head_index(vxlan, all_zeros_mac, vni);
afbd8bae 2795
fe1e0713 2796 spin_lock_bh(&vxlan->hash_lock[hash_index]);
3ad7a4b1 2797 f = __vxlan_find_mac(vxlan, all_zeros_mac, vni);
afbd8bae 2798 if (f)
0e6160f3 2799 vxlan_fdb_destroy(vxlan, f, true, true);
fe1e0713 2800 spin_unlock_bh(&vxlan->hash_lock[hash_index]);
afbd8bae
MR		 2801}
2802
ebf4063e
SH		 2803static void vxlan_uninit(struct net_device *dev)
2804{
2805 struct vxlan_dev *vxlan = netdev_priv(dev);
ebf4063e 2806
ad6c9986
SB		 2807 gro_cells_destroy(&vxlan->gro_cells);
2808
3ad7a4b1 2809 vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni);
afbd8bae 2810
ebf4063e
SH		 2811 free_percpu(dev->tstats);
2812}
2813
d342894c 2814/* Start ageing timer and join group when device is brought up */
2815static int vxlan_open(struct net_device *dev)
2816{
2817 struct vxlan_dev *vxlan = netdev_priv(dev);
205f356d 2818 int ret;
56ef9c90 2819
205f356d
JB		 2820 ret = vxlan_sock_add(vxlan);
2821 if (ret < 0)
2822 return ret;
d342894c 2823
79d4a94f 2824 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) {
56ef9c90 2825 ret = vxlan_igmp_join(vxlan);
bef0057b
MRL		 2826 if (ret == -EADDRINUSE)
2827 ret = 0;
56ef9c90 2828 if (ret) {
205f356d 2829 vxlan_sock_release(vxlan);
56ef9c90
MRL		 2830 return ret;
2831 }
d342894c 2832 }
2833
0dfbdf41 2834 if (vxlan->cfg.age_interval)
d342894c 2835 mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL);
2836
56ef9c90 2837 return ret;
d342894c 2838}
2839
2840/* Purge the forwarding table */
8b3f9337 2841static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all)
d342894c 2842{
31fec5aa 2843 unsigned int h;
d342894c 2844
d342894c 2845 for (h = 0; h < FDB_HASH_SIZE; ++h) {
2846 struct hlist_node *p, *n;
fe1e0713
L		 2847
2848 spin_lock_bh(&vxlan->hash_lock[h]);
d342894c 2849 hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
2850 struct vxlan_fdb *f
2851 = container_of(p, struct vxlan_fdb, hlist);
8b3f9337
RP		 2852 if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP)))
2853 continue;
afbd8bae
MR		 2854 /* the all_zeros_mac entry is deleted at vxlan_uninit */
2855 if (!is_zero_ether_addr(f->eth_addr))
0e6160f3 2856 vxlan_fdb_destroy(vxlan, f, true, true);
d342894c 2857 }
fe1e0713 2858 spin_unlock_bh(&vxlan->hash_lock[h]);
d342894c 2859 }
d342894c 2860}
2861
2862/* Cleanup timer and forwarding table on shutdown */
2863static int vxlan_stop(struct net_device *dev)
2864{
2865 struct vxlan_dev *vxlan = netdev_priv(dev);
f01ec1c0 2866 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
56ef9c90 2867 int ret = 0;
d342894c 2868
24c0e683 2869 if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) &&
f13b1689 2870 !vxlan_group_used(vn, vxlan))
56ef9c90 2871 ret = vxlan_igmp_leave(vxlan);
d342894c 2872
2873 del_timer_sync(&vxlan->age_timer);
2874
8b3f9337 2875 vxlan_flush(vxlan, false);
205f356d 2876 vxlan_sock_release(vxlan);
d342894c 2877
56ef9c90 2878 return ret;
d342894c 2879}
2880
d342894c 2881/* Stub, nothing needs to be done. */
2882static void vxlan_set_multicast_list(struct net_device *dev)
2883{
2884}
2885
91572088 2886static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
345010b5 2887{
91572088
JW		 2888 struct vxlan_dev *vxlan = netdev_priv(dev);
2889 struct vxlan_rdst *dst = &vxlan->default_dst;
2890 struct net_device *lowerdev = __dev_get_by_index(vxlan->net,
2891 dst->remote_ifindex);
ce44a4ae 2892 bool use_ipv6 = !!(vxlan->cfg.flags & VXLAN_F_IPV6);
345010b5 2893
91572088
JW		 2894 /* This check is different than dev->max_mtu, because it looks at
2895 * the lowerdev->mtu, rather than the static dev->max_mtu
2896 */
2897 if (lowerdev) {
2898 int max_mtu = lowerdev->mtu -
2899 (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM);
2900 if (new_mtu > max_mtu)
72564b59 2901 return -EINVAL;
72564b59
DW		 2902 }
2903
345010b5
DB		 2904 dev->mtu = new_mtu;
2905 return 0;
2906}
2907
fc4099f1
PS		 2908static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
2909{
2910 struct vxlan_dev *vxlan = netdev_priv(dev);
2911 struct ip_tunnel_info *info = skb_tunnel_info(skb);
2912 __be16 sport, dport;
2913
2914 sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
2915 vxlan->cfg.port_max, true);
2916 dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
2917
239e944f 2918 if (ip_tunnel_info_af(info) == AF_INET) {
c6fcc4fc 2919 struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
1a8496ba
JB		 2920 struct rtable *rt;
2921
655c3de1 2922 rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos,
1a8496ba 2923 info->key.u.ipv4.dst,
22f0708a
PA		 2924 &info->key.u.ipv4.src, dport, sport,
2925 &info->dst_cache, info);
1a8496ba
JB		 2926 if (IS_ERR(rt))
2927 return PTR_ERR(rt);
2928 ip_rt_put(rt);
239e944f
JB		 2929 } else {
2930#if IS_ENABLED(CONFIG_IPV6)
03dc52a8 2931 struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
239e944f
JB		 2932 struct dst_entry *ndst;
2933
655c3de1 2934 ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos,
e7f70af1 2935 info->key.label, &info->key.u.ipv6.dst,
22f0708a
PA		 2936 &info->key.u.ipv6.src, dport, sport,
2937 &info->dst_cache, info);
239e944f
JB		 2938 if (IS_ERR(ndst))
2939 return PTR_ERR(ndst);
2940 dst_release(ndst);
239e944f
JB		 2941#else /* !CONFIG_IPV6 */
2942 return -EPFNOSUPPORT;
2943#endif
2944 }
1a8496ba
JB		 2945 info->key.tp_src = sport;
2946 info->key.tp_dst = dport;
239e944f 2947 return 0;
fc4099f1
PS		 2948}
2949
0c867c9b 2950static const struct net_device_ops vxlan_netdev_ether_ops = {
d342894c 2951 .ndo_init = vxlan_init,
ebf4063e 2952 .ndo_uninit = vxlan_uninit,
d342894c 2953 .ndo_open = vxlan_open,
2954 .ndo_stop = vxlan_stop,
2955 .ndo_start_xmit = vxlan_xmit,
e8171045 2956 .ndo_get_stats64 = ip_tunnel_get_stats64,
d342894c 2957 .ndo_set_rx_mode = vxlan_set_multicast_list,
345010b5 2958 .ndo_change_mtu = vxlan_change_mtu,
d342894c 2959 .ndo_validate_addr = eth_validate_addr,
2960 .ndo_set_mac_address = eth_mac_addr,
2961 .ndo_fdb_add = vxlan_fdb_add,
2962 .ndo_fdb_del = vxlan_fdb_delete,
2963 .ndo_fdb_dump = vxlan_fdb_dump,
474c3c89 2964 .ndo_fdb_get = vxlan_fdb_get,
fc4099f1 2965 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
8f1af75d 2966 .ndo_change_proto_down = dev_change_proto_down_generic,
d342894c 2967};
2968
e1e5314d
JB		 2969static const struct net_device_ops vxlan_netdev_raw_ops = {
2970 .ndo_init = vxlan_init,
2971 .ndo_uninit = vxlan_uninit,
2972 .ndo_open = vxlan_open,
2973 .ndo_stop = vxlan_stop,
2974 .ndo_start_xmit = vxlan_xmit,
2975 .ndo_get_stats64 = ip_tunnel_get_stats64,
2976 .ndo_change_mtu = vxlan_change_mtu,
2977 .ndo_fill_metadata_dst = vxlan_fill_metadata_dst,
2978};
2979
d342894c 2980/* Info for udev, that this is a virtual tunnel endpoint */
2981static struct device_type vxlan_type = {
2982 .name = "vxlan",
2983};
2984
e5de25dc 2985/* Calls the ndo_udp_tunnel_add of the caller in order to
35e42379 2986 * supply the listening VXLAN udp ports. Callers are expected
e5de25dc 2987 * to implement the ndo_udp_tunnel_add.
53cf5275 2988 */
2d2b13fc 2989static void vxlan_offload_rx_ports(struct net_device *dev, bool push)
53cf5275
JG		 2990{
2991 struct vxlan_sock *vs;
2992 struct net *net = dev_net(dev);
2993 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
35e42379 2994 unsigned int i;
53cf5275
JG		 2995
2996 spin_lock(&vn->sock_lock);
2997 for (i = 0; i < PORT_HASH_SIZE; ++i) {
2d2b13fc
SD		 2998 hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) {
2999 unsigned short type;
3000
3001 if (vs->flags & VXLAN_F_GPE)
3002 type = UDP_TUNNEL_TYPE_VXLAN_GPE;
3003 else
3004 type = UDP_TUNNEL_TYPE_VXLAN;
3005
3006 if (push)
3007 udp_tunnel_push_rx_port(dev, vs->sock, type);
3008 else
3009 udp_tunnel_drop_rx_port(dev, vs->sock, type);
3010 }
53cf5275
JG		 3011 }
3012 spin_unlock(&vn->sock_lock);
3013}
53cf5275 3014
d342894c 3015/* Initialize the device structure. */
3016static void vxlan_setup(struct net_device *dev)
3017{
3018 struct vxlan_dev *vxlan = netdev_priv(dev);
31fec5aa 3019 unsigned int h;
d342894c 3020
65226ef8
JB		 3021 eth_hw_addr_random(dev);
3022 ether_setup(dev);
3023
cf124db5 3024 dev->needs_free_netdev = true;
d342894c 3025 SET_NETDEV_DEVTYPE(dev, &vxlan_type);
3026
d342894c 3027 dev->features |= NETIF_F_LLTX;
d6727fe3 3028 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
0afb1666 3029 dev->features |= NETIF_F_RXCSUM;
05c0db08 3030 dev->features |= NETIF_F_GSO_SOFTWARE;
0afb1666 3031
1eaa8178 3032 dev->vlan_features = dev->features;
0afb1666 3033 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
05c0db08 3034 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
02875878 3035 netif_keep_dst(dev);
0c867c9b 3036 dev->priv_flags |= IFF_NO_QUEUE;
d342894c 3037
a985343b
MS		 3038 /* MTU range: 68 - 65535 */
3039 dev->min_mtu = ETH_MIN_MTU;
3040 dev->max_mtu = ETH_MAX_MTU;
3041
553675fb 3042 INIT_LIST_HEAD(&vxlan->next);
d342894c 3043
df7e828c 3044 timer_setup(&vxlan->age_timer, vxlan_cleanup, TIMER_DEFERRABLE);
d342894c 3045
3046 vxlan->dev = dev;
3047
58ce31cc
TH		 3048 gro_cells_init(&vxlan->gro_cells, dev);
3049
fe1e0713
L		 3050 for (h = 0; h < FDB_HASH_SIZE; ++h) {
3051 spin_lock_init(&vxlan->hash_lock[h]);
d342894c 3052 INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
fe1e0713 3053 }
d342894c 3054}
3055
0c867c9b
JB		 3056static void vxlan_ether_setup(struct net_device *dev)
3057{
0c867c9b
JB		 3058 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
3059 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
3060 dev->netdev_ops = &vxlan_netdev_ether_ops;
3061}
3062
e1e5314d
JB		 3063static void vxlan_raw_setup(struct net_device *dev)
3064{
65226ef8 3065 dev->header_ops = NULL;
e1e5314d
JB		 3066 dev->type = ARPHRD_NONE;
3067 dev->hard_header_len = 0;
3068 dev->addr_len = 0;
e1e5314d
JB		 3069 dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
3070 dev->netdev_ops = &vxlan_netdev_raw_ops;
3071}
3072
d342894c 3073static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
3074 [IFLA_VXLAN_ID] = { .type = NLA_U32 },
5d174dd8 3075 [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
e4c7ed41 3076 [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) },
d342894c 3077 [IFLA_VXLAN_LINK] = { .type = NLA_U32 },
3078 [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
e4c7ed41 3079 [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) },
d342894c 3080 [IFLA_VXLAN_TOS] = { .type = NLA_U8 },
3081 [IFLA_VXLAN_TTL] = { .type = NLA_U8 },
e7f70af1 3082 [IFLA_VXLAN_LABEL] = { .type = NLA_U32 },
d342894c 3083 [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 },
3084 [IFLA_VXLAN_AGEING] = { .type = NLA_U32 },
3085 [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 },
05f47d69 3086 [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) },
e4f67add
DS		 3087 [IFLA_VXLAN_PROXY] = { .type = NLA_U8 },
3088 [IFLA_VXLAN_RSC] = { .type = NLA_U8 },
3089 [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 },
3090 [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 },
f8a9b1bc 3091 [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 },
823aa873 3092 [IFLA_VXLAN_PORT] = { .type = NLA_U16 },
5c91ae08
TH		 3093 [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 },
3094 [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
3095 [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
dfd8645e
TH		 3096 [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
3097 [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
3511494c 3098 [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
e1e5314d 3099 [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, },
0ace2ca8 3100 [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
72f6d71e 3101 [IFLA_VXLAN_TTL_INHERIT] = { .type = NLA_FLAG },
b4d30697 3102 [IFLA_VXLAN_DF] = { .type = NLA_U8 },
d342894c 3103};
3104
a8b8a889
MS		 3105static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[],
3106 struct netlink_ext_ack *extack)
d342894c 3107{
3108 if (tb[IFLA_ADDRESS]) {
3109 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
653ef6a3
GM		 3110 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
3111 "Provided link layer address is not Ethernet");
d342894c 3112 return -EINVAL;
3113 }
3114
3115 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
653ef6a3
GM		 3116 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
3117 "Provided Ethernet address is not unicast");
d342894c 3118 return -EADDRNOTAVAIL;
3119 }
3120 }
3121
a985343b 3122 if (tb[IFLA_MTU]) {
019b13ae 3123 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
a985343b 3124
653ef6a3
GM		 3125 if (mtu < ETH_MIN_MTU || mtu > ETH_MAX_MTU) {
3126 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_MTU],
3127 "MTU must be between 68 and 65535");
a985343b 3128 return -EINVAL;
653ef6a3 3129 }
a985343b
MS		 3130 }
3131
653ef6a3
GM		 3132 if (!data) {
3133 NL_SET_ERR_MSG(extack,
3134 "Required attributes not provided to perform the operation");
d342894c 3135 return -EINVAL;
653ef6a3 3136 }
d342894c 3137
3138 if (data[IFLA_VXLAN_ID]) {
a985343b
MS		 3139 u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
3140
653ef6a3
GM		 3141 if (id >= VXLAN_N_VID) {
3142 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_ID],
3143 "VXLAN ID must be lower than 16777216");
d342894c 3144 return -ERANGE;
653ef6a3 3145 }
d342894c 3146 }
3147
05f47d69 3148 if (data[IFLA_VXLAN_PORT_RANGE]) {
3149 const struct ifla_vxlan_port_range *p
3150 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
3151
3152 if (ntohs(p->high) < ntohs(p->low)) {
653ef6a3
GM		 3153 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT_RANGE],
3154 "Invalid source port range");
05f47d69 3155 return -EINVAL;
3156 }
3157 }
3158
b4d30697
SB		 3159 if (data[IFLA_VXLAN_DF]) {
3160 enum ifla_vxlan_df df = nla_get_u8(data[IFLA_VXLAN_DF]);
3161
3162 if (df < 0 || df > VXLAN_DF_MAX) {
3163 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_DF],
3164 "Invalid DF attribute");
3165 return -EINVAL;
3166 }
3167 }
3168
d342894c 3169 return 0;
3170}
3171
1b13c97f
YB		 3172static void vxlan_get_drvinfo(struct net_device *netdev,
3173 struct ethtool_drvinfo *drvinfo)
3174{
3175 strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version));
3176 strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver));
3177}
3178
3179static const struct ethtool_ops vxlan_ethtool_ops = {
3180 .get_drvinfo = vxlan_get_drvinfo,
3181 .get_link = ethtool_op_get_link,
3182};
3183
3ee64f39 3184static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
aab8cc36 3185 __be16 port, u32 flags, int ifindex)
553675fb 3186{
e4c7ed41 3187 struct socket *sock;
3ee64f39
TH		 3188 struct udp_port_cfg udp_conf;
3189 int err;
e4c7ed41 3190
3ee64f39 3191 memset(&udp_conf, 0, sizeof(udp_conf));
e4c7ed41 3192
3ee64f39
TH		 3193 if (ipv6) {
3194 udp_conf.family = AF_INET6;
3ee64f39 3195 udp_conf.use_udp6_rx_checksums =
3dc2b6a8 3196 !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX);
a43a9ef6 3197 udp_conf.ipv6_v6only = 1;
3ee64f39
TH		 3198 } else {
3199 udp_conf.family = AF_INET;
e4c7ed41 3200 }
e4c7ed41 3201
3ee64f39 3202 udp_conf.local_udp_port = port;
aab8cc36 3203 udp_conf.bind_ifindex = ifindex;
553675fb 3204
3ee64f39
TH		 3205 /* Open UDP socket */
3206 err = udp_sock_create(net, &udp_conf, &sock);
3207 if (err < 0)
3208 return ERR_PTR(err);
e4c7ed41 3209
39deb2c7 3210 return sock;
e4c7ed41
CW		 3211}
3212
3213/* Create new listen socket if needed */
b1be00a6 3214static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
aab8cc36
AB		 3215 __be16 port, u32 flags,
3216 int ifindex)
e4c7ed41
CW		 3217{
3218 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3219 struct vxlan_sock *vs;
3220 struct socket *sock;
e4c7ed41 3221 unsigned int h;
acbf74a7 3222 struct udp_tunnel_sock_cfg tunnel_cfg;
e4c7ed41 3223
dc01e7d3 3224 vs = kzalloc(sizeof(*vs), GFP_KERNEL);
e4c7ed41
CW		 3225 if (!vs)
3226 return ERR_PTR(-ENOMEM);
3227
3228 for (h = 0; h < VNI_HASH_SIZE; ++h)
3229 INIT_HLIST_HEAD(&vs->vni_list[h]);
3230
aab8cc36 3231 sock = vxlan_create_sock(net, ipv6, port, flags, ifindex);
39deb2c7 3232 if (IS_ERR(sock)) {
553675fb 3233 kfree(vs);
e50fddc8 3234 return ERR_CAST(sock);
553675fb 3235 }
e4c7ed41
CW		 3236
3237 vs->sock = sock;
66af846f 3238 refcount_set(&vs->refcnt, 1);
af33c1ad 3239 vs->flags = (flags & VXLAN_F_RCV_FLAGS);
553675fb 3240
9c2e24e1
PS		 3241 spin_lock(&vn->sock_lock);
3242 hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
e7b3db5e 3243 udp_tunnel_notify_add_rx_port(sock,
b9adcd69
AD		 3244 (vs->flags & VXLAN_F_GPE) ?
3245 UDP_TUNNEL_TYPE_VXLAN_GPE :
e7b3db5e 3246 UDP_TUNNEL_TYPE_VXLAN);
9c2e24e1 3247 spin_unlock(&vn->sock_lock);
553675fb 3248
3249 /* Mark socket as an encapsulation socket. */
5602c48c 3250 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
acbf74a7
AZ		 3251 tunnel_cfg.sk_user_data = vs;
3252 tunnel_cfg.encap_type = 1;
f2d1968e 3253 tunnel_cfg.encap_rcv = vxlan_rcv;
c3a43b9f 3254 tunnel_cfg.encap_err_lookup = vxlan_err_lookup;
acbf74a7 3255 tunnel_cfg.encap_destroy = NULL;
5602c48c
TH		 3256 tunnel_cfg.gro_receive = vxlan_gro_receive;
3257 tunnel_cfg.gro_complete = vxlan_gro_complete;
acbf74a7
AZ		 3258
3259 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
e4c7ed41 3260
9c2e24e1
PS		 3261 return vs;
3262}
3263
b1be00a6 3264static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6)
9c2e24e1 3265{
205f356d
JB		 3266 struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id);
3267 struct vxlan_sock *vs = NULL;
69e76661 3268 struct vxlan_dev_node *node;
aab8cc36
AB		 3269 int l3mdev_index = 0;
3270
3271 if (vxlan->cfg.remote_ifindex)
3272 l3mdev_index = l3mdev_master_upper_ifindex_by_index(
3273 vxlan->net, vxlan->cfg.remote_ifindex);
9c2e24e1 3274
205f356d 3275 if (!vxlan->cfg.no_share) {
56ef9c90 3276 spin_lock(&vn->sock_lock);
205f356d 3277 vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET,
aab8cc36
AB		 3278 vxlan->cfg.dst_port, vxlan->cfg.flags,
3279 l3mdev_index);
66af846f 3280 if (vs && !refcount_inc_not_zero(&vs->refcnt)) {
56ef9c90 3281 spin_unlock(&vn->sock_lock);
205f356d 3282 return -EBUSY;
56ef9c90
MRL		 3283 }
3284 spin_unlock(&vn->sock_lock);
3285 }
205f356d 3286 if (!vs)
b1be00a6 3287 vs = vxlan_socket_create(vxlan->net, ipv6,
aab8cc36
AB		 3288 vxlan->cfg.dst_port, vxlan->cfg.flags,
3289 l3mdev_index);
205f356d
JB		 3290 if (IS_ERR(vs))
3291 return PTR_ERR(vs);
b1be00a6 3292#if IS_ENABLED(CONFIG_IPV6)
69e76661 3293 if (ipv6) {
c6fcc4fc 3294 rcu_assign_pointer(vxlan->vn6_sock, vs);
69e76661
JB		 3295 node = &vxlan->hlist6;
3296 } else
b1be00a6 3297#endif
69e76661 3298 {
c6fcc4fc 3299 rcu_assign_pointer(vxlan->vn4_sock, vs);
69e76661
JB		 3300 node = &vxlan->hlist4;
3301 }
3302 vxlan_vs_add_dev(vs, vxlan, node);
205f356d 3303 return 0;
553675fb 3304}
3305
b1be00a6
JB		 3306static int vxlan_sock_add(struct vxlan_dev *vxlan)
3307{
dc5321d7
MS		 3308 bool metadata = vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA;
3309 bool ipv6 = vxlan->cfg.flags & VXLAN_F_IPV6 || metadata;
d074bf96 3310 bool ipv4 = !ipv6 || metadata;
b1be00a6
JB		 3311 int ret = 0;
3312
c6fcc4fc 3313 RCU_INIT_POINTER(vxlan->vn4_sock, NULL);
b1be00a6 3314#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc 3315 RCU_INIT_POINTER(vxlan->vn6_sock, NULL);
d074bf96 3316 if (ipv6) {
b1be00a6 3317 ret = __vxlan_sock_add(vxlan, true);
d074bf96
JB		 3318 if (ret < 0 && ret != -EAFNOSUPPORT)
3319 ipv4 = false;
3320 }
b1be00a6 3321#endif
d074bf96 3322 if (ipv4)
b1be00a6
JB		 3323 ret = __vxlan_sock_add(vxlan, false);
3324 if (ret < 0)
3325 vxlan_sock_release(vxlan);
3326 return ret;
3327}
3328
a985343b
MS		 3329static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf,
3330 struct net_device **lower,
653ef6a3
GM		 3331 struct vxlan_dev *old,
3332 struct netlink_ext_ack *extack)
d342894c 3333{
33564bbb 3334 struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
a985343b 3335 struct vxlan_dev *tmp;
e4c7ed41 3336 bool use_ipv6 = false;
d342894c 3337
a985343b
MS		 3338 if (conf->flags & VXLAN_F_GPE) {
3339 /* For now, allow GPE only together with
3340 * COLLECT_METADATA. This can be relaxed later; in such
3341 * case, the other side of the PtP link will have to be
3342 * provided.
3343 */
3344 if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) ||
3345 !(conf->flags & VXLAN_F_COLLECT_METADATA)) {
653ef6a3
GM		 3346 NL_SET_ERR_MSG(extack,
3347 "VXLAN GPE does not support this combination of attributes");
a985343b 3348 return -EINVAL;
3555621d 3349 }
e1e5314d 3350 }
0c867c9b 3351
ce44a4ae
MS		 3352 if (!conf->remote_ip.sa.sa_family && !conf->saddr.sa.sa_family) {
3353 /* Unless IPv6 is explicitly requested, assume IPv4 */
a985343b 3354 conf->remote_ip.sa.sa_family = AF_INET;
ce44a4ae
MS		 3355 conf->saddr.sa.sa_family = AF_INET;
3356 } else if (!conf->remote_ip.sa.sa_family) {
3357 conf->remote_ip.sa.sa_family = conf->saddr.sa.sa_family;
3358 } else if (!conf->saddr.sa.sa_family) {
3359 conf->saddr.sa.sa_family = conf->remote_ip.sa.sa_family;
3360 }
3361
653ef6a3
GM		 3362 if (conf->saddr.sa.sa_family != conf->remote_ip.sa.sa_family) {
3363 NL_SET_ERR_MSG(extack,
3364 "Local and remote address must be from the same family");
ce44a4ae 3365 return -EINVAL;
653ef6a3 3366 }
e4c7ed41 3367
653ef6a3
GM		 3368 if (vxlan_addr_multicast(&conf->saddr)) {
3369 NL_SET_ERR_MSG(extack, "Local address cannot be multicast");
0f22a3c6 3370 return -EINVAL;
653ef6a3 3371 }
0f22a3c6 3372
ce44a4ae 3373 if (conf->saddr.sa.sa_family == AF_INET6) {
653ef6a3
GM		 3374 if (!IS_ENABLED(CONFIG_IPV6)) {
3375 NL_SET_ERR_MSG(extack,
3376 "IPv6 support not enabled in the kernel");
057ba29b 3377 return -EPFNOSUPPORT;
653ef6a3 3378 }
e4c7ed41 3379 use_ipv6 = true;
a985343b 3380 conf->flags |= VXLAN_F_IPV6;
0f22a3c6
MS		 3381
3382 if (!(conf->flags & VXLAN_F_COLLECT_METADATA)) {
3383 int local_type =
3384 ipv6_addr_type(&conf->saddr.sin6.sin6_addr);
3385 int remote_type =
3386 ipv6_addr_type(&conf->remote_ip.sin6.sin6_addr);
3387
3388 if (local_type & IPV6_ADDR_LINKLOCAL) {
3389 if (!(remote_type & IPV6_ADDR_LINKLOCAL) &&
653ef6a3
GM		 3390 (remote_type != IPV6_ADDR_ANY)) {
3391 NL_SET_ERR_MSG(extack,
3392 "Invalid combination of local and remote address scopes");
0f22a3c6 3393 return -EINVAL;
653ef6a3 3394 }
0f22a3c6
MS		 3395
3396 conf->flags |= VXLAN_F_IPV6_LINKLOCAL;
3397 } else {
3398 if (remote_type ==
653ef6a3
GM		 3399 (IPV6_ADDR_UNICAST | IPV6_ADDR_LINKLOCAL)) {
3400 NL_SET_ERR_MSG(extack,
3401 "Invalid combination of local and remote address scopes");
0f22a3c6 3402 return -EINVAL;
653ef6a3 3403 }
0f22a3c6
MS		 3404
3405 conf->flags &= ~VXLAN_F_IPV6_LINKLOCAL;
3406 }
3407 }
057ba29b 3408 }
d342894c 3409
653ef6a3
GM		 3410 if (conf->label && !use_ipv6) {
3411 NL_SET_ERR_MSG(extack,
3412 "Label attribute only applies to IPv6 VXLAN devices");
e7f70af1 3413 return -EINVAL;
653ef6a3 3414 }
e7f70af1 3415
a985343b
MS		 3416 if (conf->remote_ifindex) {
3417 struct net_device *lowerdev;
34e02aa1 3418
a985343b 3419 lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex);
653ef6a3
GM		 3420 if (!lowerdev) {
3421 NL_SET_ERR_MSG(extack,
3422 "Invalid local interface, device not found");
34e02aa1 3423 return -ENODEV;
653ef6a3 3424 }
d342894c 3425
e4c7ed41
CW		 3426#if IS_ENABLED(CONFIG_IPV6)
3427 if (use_ipv6) {
3428 struct inet6_dev *idev = __in6_dev_get(lowerdev);
653ef6a3
GM		 3429 if (idev && idev->cnf.disable_ipv6) {
3430 NL_SET_ERR_MSG(extack,
3431 "IPv6 support disabled by administrator");
e4c7ed41 3432 return -EPERM;
653ef6a3 3433 }
e4c7ed41
CW		 3434 }
3435#endif
3436
a985343b
MS		 3437 *lower = lowerdev;
3438 } else {
653ef6a3
GM		 3439 if (vxlan_addr_multicast(&conf->remote_ip)) {
3440 NL_SET_ERR_MSG(extack,
3441 "Local interface required for multicast remote destination");
3442
a985343b 3443 return -EINVAL;
653ef6a3 3444 }
1ba56fb4 3445
0f22a3c6 3446#if IS_ENABLED(CONFIG_IPV6)
653ef6a3
GM		 3447 if (conf->flags & VXLAN_F_IPV6_LINKLOCAL) {
3448 NL_SET_ERR_MSG(extack,
3449 "Local interface required for link-local local/remote addresses");
0f22a3c6 3450 return -EINVAL;
653ef6a3 3451 }
0f22a3c6
MS		 3452#endif
3453
a985343b 3454 *lower = NULL;
9dc2ad10 3455 }
d342894c 3456
a985343b
MS		 3457 if (!conf->dst_port) {
3458 if (conf->flags & VXLAN_F_GPE)
3459 conf->dst_port = htons(4790); /* IANA VXLAN-GPE port */
3460 else
3461 conf->dst_port = htons(vxlan_port);
d6acfeb1
FM		 3462 }
3463
a985343b
MS		 3464 if (!conf->age_interval)
3465 conf->age_interval = FDB_AGE_DEFAULT;
91572088 3466
a985343b
MS		 3467 list_for_each_entry(tmp, &vn->vxlan_list, next) {
3468 if (tmp == old)
3469 continue;
91572088 3470
49f810f0
MS		 3471 if (tmp->cfg.vni != conf->vni)
3472 continue;
3473 if (tmp->cfg.dst_port != conf->dst_port)
3474 continue;
3475 if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) !=
ce44a4ae 3476 (conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)))
49f810f0
MS		 3477 continue;
3478
3479 if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) &&
3480 tmp->cfg.remote_ifindex != conf->remote_ifindex)
3481 continue;
3482
653ef6a3
GM		 3483 NL_SET_ERR_MSG(extack,
3484 "A VXLAN device with the specified VNI already exists");
49f810f0 3485 return -EEXIST;
a985343b 3486 }
91572088 3487
a985343b
MS		 3488 return 0;
3489}
3490
3491static void vxlan_config_apply(struct net_device *dev,
3492 struct vxlan_config *conf,
889ce937
SD		 3493 struct net_device *lowerdev,
3494 struct net *src_net,
3495 bool changelink)
a985343b
MS		 3496{
3497 struct vxlan_dev *vxlan = netdev_priv(dev);
3498 struct vxlan_rdst *dst = &vxlan->default_dst;
3499 unsigned short needed_headroom = ETH_HLEN;
3500 bool use_ipv6 = !!(conf->flags & VXLAN_F_IPV6);
3501 int max_mtu = ETH_MAX_MTU;
3502
3503 if (!changelink) {
3504 if (conf->flags & VXLAN_F_GPE)
3505 vxlan_raw_setup(dev);
3506 else
3507 vxlan_ether_setup(dev);
3508
3509 if (conf->mtu)
3510 dev->mtu = conf->mtu;
889ce937
SD		 3511
3512 vxlan->net = src_net;
a985343b
MS		 3513 }
3514
3515 dst->remote_vni = conf->vni;
3516
3517 memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip));
3518
3519 if (lowerdev) {
3520 dst->remote_ifindex = conf->remote_ifindex;
3521
3522 dev->gso_max_size = lowerdev->gso_max_size;
3523 dev->gso_max_segs = lowerdev->gso_max_segs;
91572088 3524
a985343b 3525 needed_headroom = lowerdev->hard_header_len;
91572088 3526
a985343b
MS		 3527 max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM :
3528 VXLAN_HEADROOM);
f870c1ff
AK		 3529 if (max_mtu < ETH_MIN_MTU)
3530 max_mtu = ETH_MIN_MTU;
3531
3532 if (!changelink && !conf->mtu)
3533 dev->mtu = max_mtu;
7e059158
DW		 3534 }
3535
a985343b
MS		 3536 if (dev->mtu > max_mtu)
3537 dev->mtu = max_mtu;
3538
b1be00a6
JB		 3539 if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA)
3540 needed_headroom += VXLAN6_HEADROOM;
3541 else
3542 needed_headroom += VXLAN_HEADROOM;
3543 dev->needed_headroom = needed_headroom;
3544
0dfbdf41 3545 memcpy(&vxlan->cfg, conf, sizeof(*conf));
a985343b 3546}
0dfbdf41 3547
a985343b 3548static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
653ef6a3
GM		 3549 struct vxlan_config *conf, bool changelink,
3550 struct netlink_ext_ack *extack)
a985343b
MS		 3551{
3552 struct vxlan_dev *vxlan = netdev_priv(dev);
3553 struct net_device *lowerdev;
3554 int ret;
0dfbdf41 3555
653ef6a3 3556 ret = vxlan_config_validate(src_net, conf, &lowerdev, vxlan, extack);
a985343b
MS		 3557 if (ret)
3558 return ret;
8bcdc4f3 3559
889ce937 3560 vxlan_config_apply(dev, conf, lowerdev, src_net, changelink);
0dfbdf41 3561
0dfbdf41
TG		 3562 return 0;
3563}
3564
c80498e3 3565static int __vxlan_dev_create(struct net *net, struct net_device *dev,
653ef6a3
GM		 3566 struct vxlan_config *conf,
3567 struct netlink_ext_ack *extack)
c80498e3
ND		 3568{
3569 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
3570 struct vxlan_dev *vxlan = netdev_priv(dev);
0ce1822c 3571 struct net_device *remote_dev = NULL;
0241b836 3572 struct vxlan_fdb *f = NULL;
6db92468 3573 bool unregister = false;
0ce1822c 3574 struct vxlan_rdst *dst;
c80498e3
ND		 3575 int err;
3576
0ce1822c 3577 dst = &vxlan->default_dst;
653ef6a3 3578 err = vxlan_dev_configure(net, dev, conf, false, extack);
c80498e3
ND		 3579 if (err)
3580 return err;
3581
3582 dev->ethtool_ops = &vxlan_ethtool_ops;
3583
3584 /* create an fdb entry for a valid default destination */
0ce1822c 3585 if (!vxlan_addr_any(&dst->remote_ip)) {
0241b836 3586 err = vxlan_fdb_create(vxlan, all_zeros_mac,
0ce1822c 3587 &dst->remote_ip,
c80498e3 3588 NUD_REACHABLE | NUD_PERMANENT,
c80498e3 3589 vxlan->cfg.dst_port,
0ce1822c
TY		 3590 dst->remote_vni,
3591 dst->remote_vni,
3592 dst->remote_ifindex,
0241b836 3593 NTF_SELF, &f);
c80498e3
ND		 3594 if (err)
3595 return err;
3596 }
3597
3598 err = register_netdevice(dev);
0241b836
RP		 3599 if (err)
3600 goto errout;
6db92468 3601 unregister = true;
0241b836 3602
0ce1822c
TY		 3603 if (dst->remote_ifindex) {
3604 remote_dev = __dev_get_by_index(net, dst->remote_ifindex);
3605 if (!remote_dev)
3606 goto errout;
3607
3608 err = netdev_upper_dev_link(remote_dev, dev, extack);
3609 if (err)
3610 goto errout;
3611 }
3612
0241b836 3613 err = rtnl_configure_link(dev, NULL);
6db92468 3614 if (err)
0ce1822c 3615 goto unlink;
c80498e3 3616
61f46fe8 3617 if (f) {
0ce1822c 3618 vxlan_fdb_insert(vxlan, all_zeros_mac, dst->remote_vni, f);
7c31e54a
TY		 3619
3620 /* notify default fdb entry */
61f46fe8 3621 err = vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f),
4c59b7d1 3622 RTM_NEWNEIGH, true, extack);
7c31e54a
TY		 3623 if (err) {
3624 vxlan_fdb_destroy(vxlan, f, false, false);
0ce1822c
TY		 3625 if (remote_dev)
3626 netdev_upper_dev_unlink(remote_dev, dev);
7c31e54a
TY		 3627 goto unregister;
3628 }
61f46fe8 3629 }
0241b836 3630
c80498e3 3631 list_add(&vxlan->next, &vn->vxlan_list);
0ce1822c
TY		 3632 if (remote_dev)
3633 dst->remote_dev = remote_dev;
c80498e3 3634 return 0;
0ce1822c
TY		 3635unlink:
3636 if (remote_dev)
3637 netdev_upper_dev_unlink(remote_dev, dev);
0241b836 3638errout:
6db92468
PM		 3639 /* unregister_netdevice() destroys the default FDB entry with deletion
3640 * notification. But the addition notification was not sent yet, so
3641 * destroy the entry by hand here.
3642 */
0241b836 3643 if (f)
7c31e54a
TY		 3644 __vxlan_fdb_free(f);
3645unregister:
6db92468
PM		 3646 if (unregister)
3647 unregister_netdevice(dev);
0241b836 3648 return err;
c80498e3
ND		 3649}
3650
70fb0828
RP		 3651/* Set/clear flags based on attribute */
3652static int vxlan_nl2flag(struct vxlan_config *conf, struct nlattr *tb[],
3653 int attrtype, unsigned long mask, bool changelink,
3654 bool changelink_supported,
3655 struct netlink_ext_ack *extack)
3656{
3657 unsigned long flags;
3658
3659 if (!tb[attrtype])
3660 return 0;
3661
3662 if (changelink && !changelink_supported) {
3663 vxlan_flag_attr_error(attrtype, extack);
3664 return -EOPNOTSUPP;
3665 }
3666
3667 if (vxlan_policy[attrtype].type == NLA_FLAG)
3668 flags = conf->flags | mask;
3669 else if (nla_get_u8(tb[attrtype]))
3670 flags = conf->flags | mask;
3671 else
3672 flags = conf->flags & ~mask;
3673
3674 conf->flags = flags;
3675
3676 return 0;
3677}
3678
8bcdc4f3
RP		 3679static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
3680 struct net_device *dev, struct vxlan_config *conf,
70fb0828 3681 bool changelink, struct netlink_ext_ack *extack)
0dfbdf41 3682{
8bcdc4f3 3683 struct vxlan_dev *vxlan = netdev_priv(dev);
70fb0828 3684 int err = 0;
0dfbdf41 3685
8bcdc4f3 3686 memset(conf, 0, sizeof(*conf));
e277de5f 3687
8bcdc4f3
RP		 3688 /* if changelink operation, start with old existing cfg */
3689 if (changelink)
3690 memcpy(conf, &vxlan->cfg, sizeof(*conf));
3691
3692 if (data[IFLA_VXLAN_ID]) {
3693 __be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
3694
70fb0828
RP		 3695 if (changelink && (vni != conf->vni)) {
3696 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_ID], "Cannot change VNI");
8bcdc4f3 3697 return -EOPNOTSUPP;
70fb0828 3698 }
8bcdc4f3
RP		 3699 conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
3700 }
0dfbdf41
TG		 3701
3702 if (data[IFLA_VXLAN_GROUP]) {
70fb0828
RP		 3703 if (changelink && (conf->remote_ip.sa.sa_family != AF_INET)) {
3704 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP], "New group address family does not match old group");
ce44a4ae 3705 return -EOPNOTSUPP;
70fb0828 3706 }
ce44a4ae 3707
8bcdc4f3 3708 conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
ce44a4ae 3709 conf->remote_ip.sa.sa_family = AF_INET;
0dfbdf41 3710 } else if (data[IFLA_VXLAN_GROUP6]) {
70fb0828
RP		 3711 if (!IS_ENABLED(CONFIG_IPV6)) {
3712 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP6], "IPv6 support not enabled in the kernel");
0dfbdf41 3713 return -EPFNOSUPPORT;
70fb0828 3714 }
0dfbdf41 3715
70fb0828
RP		 3716 if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6)) {
3717 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP6], "New group address family does not match old group");
ce44a4ae 3718 return -EOPNOTSUPP;
70fb0828 3719 }
ce44a4ae 3720
8bcdc4f3
RP		 3721 conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
3722 conf->remote_ip.sa.sa_family = AF_INET6;
0dfbdf41
TG		 3723 }
3724
3725 if (data[IFLA_VXLAN_LOCAL]) {
70fb0828
RP		 3726 if (changelink && (conf->saddr.sa.sa_family != AF_INET)) {
3727 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL], "New local address family does not match old");
ce44a4ae 3728 return -EOPNOTSUPP;
70fb0828 3729 }
ce44a4ae 3730
8bcdc4f3
RP		 3731 conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
3732 conf->saddr.sa.sa_family = AF_INET;
0dfbdf41 3733 } else if (data[IFLA_VXLAN_LOCAL6]) {
70fb0828
RP		 3734 if (!IS_ENABLED(CONFIG_IPV6)) {
3735 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL6], "IPv6 support not enabled in the kernel");
0dfbdf41 3736 return -EPFNOSUPPORT;
70fb0828 3737 }
0dfbdf41 3738
70fb0828
RP		 3739 if (changelink && (conf->saddr.sa.sa_family != AF_INET6)) {
3740 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL6], "New local address family does not match old");
ce44a4ae 3741 return -EOPNOTSUPP;
70fb0828 3742 }
ce44a4ae 3743
0dfbdf41 3744 /* TODO: respect scope id */
8bcdc4f3
RP		 3745 conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
3746 conf->saddr.sa.sa_family = AF_INET6;
0dfbdf41
TG		 3747 }
3748
3749 if (data[IFLA_VXLAN_LINK])
8bcdc4f3 3750 conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]);
0dfbdf41 3751
d342894c 3752 if (data[IFLA_VXLAN_TOS])
8bcdc4f3 3753 conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]);
d342894c 3754
afb97186 3755 if (data[IFLA_VXLAN_TTL])
8bcdc4f3 3756 conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]);
afb97186 3757
72f6d71e 3758 if (data[IFLA_VXLAN_TTL_INHERIT]) {
70fb0828
RP		 3759 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_TTL_INHERIT,
3760 VXLAN_F_TTL_INHERIT, changelink, false,
3761 extack);
3762 if (err)
3763 return err;
3764
72f6d71e
HL		 3765 }
3766
e7f70af1 3767 if (data[IFLA_VXLAN_LABEL])
8bcdc4f3 3768 conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) &
e7f70af1
DB		 3769 IPV6_FLOWLABEL_MASK;
3770
8bcdc4f3 3771 if (data[IFLA_VXLAN_LEARNING]) {
70fb0828
RP		 3772 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_LEARNING,
3773 VXLAN_F_LEARN, changelink, true,
3774 extack);
3775 if (err)
3776 return err;
8bcdc4f3
RP		 3777 } else if (!changelink) {
3778 /* default to learn on a new device */
3779 conf->flags |= VXLAN_F_LEARN;
3780 }
d342894c 3781
40051c4d 3782 if (data[IFLA_VXLAN_AGEING])
8bcdc4f3 3783 conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]);
d342894c 3784
8bcdc4f3 3785 if (data[IFLA_VXLAN_PROXY]) {
70fb0828
RP		 3786 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_PROXY,
3787 VXLAN_F_PROXY, changelink, false,
3788 extack);
3789 if (err)
3790 return err;
8bcdc4f3 3791 }
e4f67add 3792
8bcdc4f3 3793 if (data[IFLA_VXLAN_RSC]) {
70fb0828
RP		 3794 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_RSC,
3795 VXLAN_F_RSC, changelink, false,
3796 extack);
3797 if (err)
3798 return err;
8bcdc4f3 3799 }
e4f67add 3800
8bcdc4f3 3801 if (data[IFLA_VXLAN_L2MISS]) {
70fb0828
RP		 3802 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_L2MISS,
3803 VXLAN_F_L2MISS, changelink, false,
3804 extack);
3805 if (err)
3806 return err;
8bcdc4f3 3807 }
e4f67add 3808
8bcdc4f3 3809 if (data[IFLA_VXLAN_L3MISS]) {
70fb0828
RP		 3810 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_L3MISS,
3811 VXLAN_F_L3MISS, changelink, false,
3812 extack);
3813 if (err)
3814 return err;
8bcdc4f3 3815 }
e4f67add 3816
8bcdc4f3 3817 if (data[IFLA_VXLAN_LIMIT]) {
70fb0828
RP		 3818 if (changelink) {
3819 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LIMIT],
3820 "Cannot change limit");
8bcdc4f3 3821 return -EOPNOTSUPP;
70fb0828 3822 }
8bcdc4f3
RP		 3823 conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
3824 }
d342894c 3825
8bcdc4f3 3826 if (data[IFLA_VXLAN_COLLECT_METADATA]) {
70fb0828
RP		 3827 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_COLLECT_METADATA,
3828 VXLAN_F_COLLECT_METADATA, changelink, false,
3829 extack);
3830 if (err)
3831 return err;
8bcdc4f3 3832 }
f8a9b1bc 3833
05f47d69 3834 if (data[IFLA_VXLAN_PORT_RANGE]) {
8bcdc4f3
RP		 3835 if (!changelink) {
3836 const struct ifla_vxlan_port_range *p
3837 = nla_data(data[IFLA_VXLAN_PORT_RANGE]);
3838 conf->port_min = ntohs(p->low);
3839 conf->port_max = ntohs(p->high);
3840 } else {
70fb0828
RP		 3841 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT_RANGE],
3842 "Cannot change port range");
8bcdc4f3
RP		 3843 return -EOPNOTSUPP;
3844 }
05f47d69 3845 }
3846
8bcdc4f3 3847 if (data[IFLA_VXLAN_PORT]) {
70fb0828
RP		 3848 if (changelink) {
3849 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT],
3850 "Cannot change port");
8bcdc4f3 3851 return -EOPNOTSUPP;
70fb0828 3852 }
8bcdc4f3
RP		 3853 conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
3854 }
823aa873 3855
8bcdc4f3 3856 if (data[IFLA_VXLAN_UDP_CSUM]) {
70fb0828
RP		 3857 if (changelink) {
3858 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_UDP_CSUM],
3859 "Cannot change UDP_CSUM flag");
8bcdc4f3 3860 return -EOPNOTSUPP;
70fb0828 3861 }
8bcdc4f3
RP		 3862 if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
3863 conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
3864 }
359a0ea9 3865
8bcdc4f3 3866 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) {
70fb0828
RP		 3867 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
3868 VXLAN_F_UDP_ZERO_CSUM6_TX, changelink,
3869 false, extack);
3870 if (err)
3871 return err;
8bcdc4f3 3872 }
359a0ea9 3873
8bcdc4f3 3874 if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) {
70fb0828
RP		 3875 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
3876 VXLAN_F_UDP_ZERO_CSUM6_RX, changelink,
3877 false, extack);
3878 if (err)
3879 return err;
8bcdc4f3 3880 }
359a0ea9 3881
8bcdc4f3 3882 if (data[IFLA_VXLAN_REMCSUM_TX]) {
70fb0828
RP		 3883 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_REMCSUM_TX,
3884 VXLAN_F_REMCSUM_TX, changelink, false,
3885 extack);
3886 if (err)
3887 return err;
8bcdc4f3 3888 }
dfd8645e 3889
8bcdc4f3 3890 if (data[IFLA_VXLAN_REMCSUM_RX]) {
70fb0828
RP		 3891 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_REMCSUM_RX,
3892 VXLAN_F_REMCSUM_RX, changelink, false,
3893 extack);
3894 if (err)
3895 return err;
8bcdc4f3
RP		 3896 }
3897
3898 if (data[IFLA_VXLAN_GBP]) {
70fb0828
RP		 3899 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_GBP,
3900 VXLAN_F_GBP, changelink, false, extack);
3901 if (err)
3902 return err;
8bcdc4f3
RP		 3903 }
3904
3905 if (data[IFLA_VXLAN_GPE]) {
70fb0828
RP		 3906 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_GPE,
3907 VXLAN_F_GPE, changelink, false,
3908 extack);
3909 if (err)
3910 return err;
8bcdc4f3
RP		 3911 }
3912
3913 if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) {
70fb0828
RP		 3914 err = vxlan_nl2flag(conf, data, IFLA_VXLAN_REMCSUM_NOPARTIAL,
3915 VXLAN_F_REMCSUM_NOPARTIAL, changelink,
3916 false, extack);
3917 if (err)
3918 return err;
8bcdc4f3
RP		 3919 }
3920
3921 if (tb[IFLA_MTU]) {
70fb0828
RP		 3922 if (changelink) {
3923 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_MTU],
3924 "Cannot change mtu");
8bcdc4f3 3925 return -EOPNOTSUPP;
70fb0828 3926 }
8bcdc4f3
RP		 3927 conf->mtu = nla_get_u32(tb[IFLA_MTU]);
3928 }
3929
b4d30697
SB		 3930 if (data[IFLA_VXLAN_DF])
3931 conf->df = nla_get_u8(data[IFLA_VXLAN_DF]);
3932
8bcdc4f3
RP		 3933 return 0;
3934}
3935
3936static int vxlan_newlink(struct net *src_net, struct net_device *dev,
7a3f4a18
MS		 3937 struct nlattr *tb[], struct nlattr *data[],
3938 struct netlink_ext_ack *extack)
8bcdc4f3 3939{
8bcdc4f3
RP		 3940 struct vxlan_config conf;
3941 int err;
3942
70fb0828 3943 err = vxlan_nl2conf(tb, data, dev, &conf, false, extack);
8bcdc4f3
RP		 3944 if (err)
3945 return err;
3946
653ef6a3 3947 return __vxlan_dev_create(src_net, dev, &conf, extack);
8bcdc4f3 3948}
dfd8645e 3949
8bcdc4f3 3950static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
ad744b22
MS		 3951 struct nlattr *data[],
3952 struct netlink_ext_ack *extack)
8bcdc4f3
RP		 3953{
3954 struct vxlan_dev *vxlan = netdev_priv(dev);
8db9427d 3955 struct net_device *lowerdev;
8bcdc4f3 3956 struct vxlan_config conf;
0ce1822c 3957 struct vxlan_rdst *dst;
8bcdc4f3
RP		 3958 int err;
3959
0ce1822c 3960 dst = &vxlan->default_dst;
70fb0828 3961 err = vxlan_nl2conf(tb, data, dev, &conf, true, extack);
8bcdc4f3
RP		 3962 if (err)
3963 return err;
3511494c 3964
8db9427d
PM		 3965 err = vxlan_config_validate(vxlan->net, &conf, &lowerdev,
3966 vxlan, extack);
8bcdc4f3
RP		 3967 if (err)
3968 return err;
0ace2ca8 3969
0ce1822c
TY		 3970 err = netdev_adjacent_change_prepare(dst->remote_dev, lowerdev, dev,
3971 extack);
3972 if (err)
3973 return err;
3974
8bcdc4f3 3975 /* handle default dst entry */
038a5a99 3976 if (!vxlan_addr_equal(&conf.remote_ip, &dst->remote_ip)) {
fe1e0713
L		 3977 u32 hash_index = fdb_head_index(vxlan, all_zeros_mac, conf.vni);
3978
3979 spin_lock_bh(&vxlan->hash_lock[hash_index]);
038a5a99 3980 if (!vxlan_addr_any(&conf.remote_ip)) {
ce5e098f 3981 err = vxlan_fdb_update(vxlan, all_zeros_mac,
038a5a99 3982 &conf.remote_ip,
8bcdc4f3 3983 NUD_REACHABLE | NUD_PERMANENT,
ce5e098f 3984 NLM_F_APPEND | NLM_F_CREATE,
8bcdc4f3 3985 vxlan->cfg.dst_port,
038a5a99
PM		 3986 conf.vni, conf.vni,
3987 conf.remote_ifindex,
4c59b7d1 3988 NTF_SELF, true, extack);
8bcdc4f3 3989 if (err) {
fe1e0713 3990 spin_unlock_bh(&vxlan->hash_lock[hash_index]);
0ce1822c
TY		 3991 netdev_adjacent_change_abort(dst->remote_dev,
3992 lowerdev, dev);
8bcdc4f3
RP		 3993 return err;
3994 }
3995 }
1cdc98c2
PM		 3996 if (!vxlan_addr_any(&dst->remote_ip))
3997 __vxlan_fdb_delete(vxlan, all_zeros_mac,
3998 dst->remote_ip,
3999 vxlan->cfg.dst_port,
4000 dst->remote_vni,
4001 dst->remote_vni,
4002 dst->remote_ifindex,
4003 true);
fe1e0713 4004 spin_unlock_bh(&vxlan->hash_lock[hash_index]);
8bcdc4f3 4005 }
ce577668 4006
038a5a99
PM		 4007 if (conf.age_interval != vxlan->cfg.age_interval)
4008 mod_timer(&vxlan->age_timer, jiffies);
4009
0ce1822c
TY		 4010 netdev_adjacent_change_commit(dst->remote_dev, lowerdev, dev);
4011 if (lowerdev && lowerdev != dst->remote_dev)
4012 dst->remote_dev = lowerdev;
4013
4014 netdev_update_lockdep_key(lowerdev);
038a5a99 4015 vxlan_config_apply(dev, &conf, lowerdev, vxlan->net, true);
8bcdc4f3 4016 return 0;
d342894c 4017}
4018
4019static void vxlan_dellink(struct net_device *dev, struct list_head *head)
4020{
4021 struct vxlan_dev *vxlan = netdev_priv(dev);
4022
8b3f9337
RP		 4023 vxlan_flush(vxlan, true);
4024
553675fb 4025 list_del(&vxlan->next);
d342894c 4026 unregister_netdevice_queue(dev, head);
0ce1822c
TY		 4027 if (vxlan->default_dst.remote_dev)
4028 netdev_upper_dev_unlink(vxlan->default_dst.remote_dev, dev);
d342894c 4029}
4030
4031static size_t vxlan_get_size(const struct net_device *dev)
4032{
4033
4034 return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */
e4c7ed41 4035 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */
d342894c 4036 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */
e4c7ed41 4037 nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */
d342894c 4038 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */
8fd78069 4039 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL_INHERIT */
d342894c 4040 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */
b4d30697 4041 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_DF */
e7f70af1 4042 nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */
d342894c 4043 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */
e4f67add
DS		 4044 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */
4045 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */
4046 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */
4047 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */
da8b43c0 4048 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */
d342894c 4049 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */
4050 nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */
05f47d69 4051 nla_total_size(sizeof(struct ifla_vxlan_port_range)) +
359a0ea9
TH		 4052 nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */
4053 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */
4054 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */
4055 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */
dfd8645e
TH		 4056 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */
4057 nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */
d342894c 4058 0;
4059}
4060
4061static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
4062{
4063 const struct vxlan_dev *vxlan = netdev_priv(dev);
c7995c43 4064 const struct vxlan_rdst *dst = &vxlan->default_dst;
05f47d69 4065 struct ifla_vxlan_port_range ports = {
0dfbdf41
TG		 4066 .low = htons(vxlan->cfg.port_min),
4067 .high = htons(vxlan->cfg.port_max),
05f47d69 4068 };
d342894c 4069
54bfd872 4070 if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni)))
d342894c 4071 goto nla_put_failure;
4072
e4c7ed41
CW		 4073 if (!vxlan_addr_any(&dst->remote_ip)) {
4074 if (dst->remote_ip.sa.sa_family == AF_INET) {
930345ea
JB		 4075 if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP,
4076 dst->remote_ip.sin.sin_addr.s_addr))
e4c7ed41
CW		 4077 goto nla_put_failure;
4078#if IS_ENABLED(CONFIG_IPV6)
4079 } else {
930345ea
JB		 4080 if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6,
4081 &dst->remote_ip.sin6.sin6_addr))
e4c7ed41
CW		 4082 goto nla_put_failure;
4083#endif
4084 }
4085 }
d342894c 4086
c7995c43 4087 if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex))
d342894c 4088 goto nla_put_failure;
4089
0dfbdf41
TG		 4090 if (!vxlan_addr_any(&vxlan->cfg.saddr)) {
4091 if (vxlan->cfg.saddr.sa.sa_family == AF_INET) {
930345ea 4092 if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL,
0dfbdf41 4093 vxlan->cfg.saddr.sin.sin_addr.s_addr))
e4c7ed41
CW		 4094 goto nla_put_failure;
4095#if IS_ENABLED(CONFIG_IPV6)
4096 } else {
930345ea 4097 if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6,
0dfbdf41 4098 &vxlan->cfg.saddr.sin6.sin6_addr))
e4c7ed41
CW		 4099 goto nla_put_failure;
4100#endif
4101 }
4102 }
d342894c 4103
0dfbdf41 4104 if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) ||
8fd78069
HL		 4105 nla_put_u8(skb, IFLA_VXLAN_TTL_INHERIT,
4106 !!(vxlan->cfg.flags & VXLAN_F_TTL_INHERIT)) ||
0dfbdf41 4107 nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) ||
b4d30697 4108 nla_put_u8(skb, IFLA_VXLAN_DF, vxlan->cfg.df) ||
e7f70af1 4109 nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) ||
e4f67add 4110 nla_put_u8(skb, IFLA_VXLAN_LEARNING,
dc5321d7 4111 !!(vxlan->cfg.flags & VXLAN_F_LEARN)) ||
e4f67add 4112 nla_put_u8(skb, IFLA_VXLAN_PROXY,
dc5321d7
MS		 4113 !!(vxlan->cfg.flags & VXLAN_F_PROXY)) ||
4114 nla_put_u8(skb, IFLA_VXLAN_RSC,
4115 !!(vxlan->cfg.flags & VXLAN_F_RSC)) ||
e4f67add 4116 nla_put_u8(skb, IFLA_VXLAN_L2MISS,
dc5321d7 4117 !!(vxlan->cfg.flags & VXLAN_F_L2MISS)) ||
e4f67add 4118 nla_put_u8(skb, IFLA_VXLAN_L3MISS,
dc5321d7 4119 !!(vxlan->cfg.flags & VXLAN_F_L3MISS)) ||
da8b43c0 4120 nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA,
dc5321d7 4121 !!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)) ||
0dfbdf41
TG		 4122 nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) ||
4123 nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) ||
4124 nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) ||
359a0ea9 4125 nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM,
dc5321d7 4126 !(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM_TX)) ||
359a0ea9 4127 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
dc5321d7 4128 !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) ||
359a0ea9 4129 nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
dc5321d7 4130 !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) ||
dfd8645e 4131 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX,
dc5321d7 4132 !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_TX)) ||
dfd8645e 4133 nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX,
dc5321d7 4134 !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_RX)))
d342894c 4135 goto nla_put_failure;
4136
05f47d69 4137 if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports))
4138 goto nla_put_failure;
4139
dc5321d7 4140 if (vxlan->cfg.flags & VXLAN_F_GBP &&
3511494c
TG		 4141 nla_put_flag(skb, IFLA_VXLAN_GBP))
4142 goto nla_put_failure;
4143
dc5321d7 4144 if (vxlan->cfg.flags & VXLAN_F_GPE &&
e1e5314d
JB		 4145 nla_put_flag(skb, IFLA_VXLAN_GPE))
4146 goto nla_put_failure;
4147
dc5321d7 4148 if (vxlan->cfg.flags & VXLAN_F_REMCSUM_NOPARTIAL &&
0ace2ca8
TH		 4149 nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
4150 goto nla_put_failure;
4151
d342894c 4152 return 0;
4153
4154nla_put_failure:
4155 return -EMSGSIZE;
4156}
4157
1728d4fa
ND		 4158static struct net *vxlan_get_link_net(const struct net_device *dev)
4159{
4160 struct vxlan_dev *vxlan = netdev_priv(dev);
4161
4162 return vxlan->net;
4163}
4164
d342894c 4165static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
4166 .kind = "vxlan",
4167 .maxtype = IFLA_VXLAN_MAX,
4168 .policy = vxlan_policy,
4169 .priv_size = sizeof(struct vxlan_dev),
4170 .setup = vxlan_setup,
4171 .validate = vxlan_validate,
4172 .newlink = vxlan_newlink,
8bcdc4f3 4173 .changelink = vxlan_changelink,
d342894c 4174 .dellink = vxlan_dellink,
4175 .get_size = vxlan_get_size,
4176 .fill_info = vxlan_fill_info,
1728d4fa 4177 .get_link_net = vxlan_get_link_net,
d342894c 4178};
4179
cf5da330
ND		 4180struct net_device *vxlan_dev_create(struct net *net, const char *name,
4181 u8 name_assign_type,
4182 struct vxlan_config *conf)
4183{
4184 struct nlattr *tb[IFLA_MAX + 1];
4185 struct net_device *dev;
4186 int err;
4187
4188 memset(&tb, 0, sizeof(tb));
4189
4190 dev = rtnl_create_link(net, name, name_assign_type,
d0522f1c 4191 &vxlan_link_ops, tb, NULL);
cf5da330
ND		 4192 if (IS_ERR(dev))
4193 return dev;
4194
653ef6a3 4195 err = __vxlan_dev_create(net, dev, conf, NULL);
cf5da330
ND		 4196 if (err < 0) {
4197 free_netdev(dev);
4198 return ERR_PTR(err);
4199 }
4200
4201 err = rtnl_configure_link(dev, NULL);
4202 if (err < 0) {
4203 LIST_HEAD(list_kill);
4204
4205 vxlan_dellink(dev, &list_kill);
4206 unregister_netdevice_many(&list_kill);
4207 return ERR_PTR(err);
4208 }
4209
4210 return dev;
4211}
4212EXPORT_SYMBOL_GPL(vxlan_dev_create);
4213
acaf4e70
DB		 4214static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
4215 struct net_device *dev)
4216{
4217 struct vxlan_dev *vxlan, *next;
4218 LIST_HEAD(list_kill);
4219
4220 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
4221 struct vxlan_rdst *dst = &vxlan->default_dst;
4222
4223 /* In case we created vxlan device with carrier
4224 * and we loose the carrier due to module unload
4225 * we also need to remove vxlan device. In other
4226 * cases, it's not necessary and remote_ifindex
4227 * is 0 here, so no matches.
4228 */
4229 if (dst->remote_ifindex == dev->ifindex)
4230 vxlan_dellink(vxlan->dev, &list_kill);
4231 }
4232
4233 unregister_netdevice_many(&list_kill);
4234}
4235
b7aade15
HFS		 4236static int vxlan_netdevice_event(struct notifier_block *unused,
4237 unsigned long event, void *ptr)
acaf4e70
DB		 4238{
4239 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
783c1463 4240 struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
acaf4e70 4241
04584957
SD		 4242 if (event == NETDEV_UNREGISTER) {
4243 vxlan_offload_rx_ports(dev, false);
acaf4e70 4244 vxlan_handle_lowerdev_unregister(vn, dev);
04584957
SD		 4245 } else if (event == NETDEV_REGISTER) {
4246 vxlan_offload_rx_ports(dev, true);
4247 } else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO ||
4248 event == NETDEV_UDP_TUNNEL_DROP_INFO) {
2d2b13fc 4249 vxlan_offload_rx_ports(dev, event == NETDEV_UDP_TUNNEL_PUSH_INFO);
04584957 4250 }
acaf4e70
DB		 4251
4252 return NOTIFY_DONE;
4253}
4254
4255static struct notifier_block vxlan_notifier_block __read_mostly = {
b7aade15 4256 .notifier_call = vxlan_netdevice_event,
acaf4e70
DB		 4257};
4258
0efe1173
PM		 4259static void
4260vxlan_fdb_offloaded_set(struct net_device *dev,
4261 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
4262{
4263 struct vxlan_dev *vxlan = netdev_priv(dev);
4264 struct vxlan_rdst *rdst;
4265 struct vxlan_fdb *f;
fe1e0713
L		 4266 u32 hash_index;
4267
4268 hash_index = fdb_head_index(vxlan, fdb_info->eth_addr, fdb_info->vni);
0efe1173 4269
fe1e0713 4270 spin_lock_bh(&vxlan->hash_lock[hash_index]);
0efe1173
PM		 4271
4272 f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni);
4273 if (!f)
4274 goto out;
4275
4276 rdst = vxlan_fdb_find_rdst(f, &fdb_info->remote_ip,
4277 fdb_info->remote_port,
4278 fdb_info->remote_vni,
4279 fdb_info->remote_ifindex);
4280 if (!rdst)
4281 goto out;
4282
4283 rdst->offloaded = fdb_info->offloaded;
4284
4285out:
fe1e0713 4286 spin_unlock_bh(&vxlan->hash_lock[hash_index]);
0efe1173
PM		 4287}
4288
5728ae0d
PM		 4289static int
4290vxlan_fdb_external_learn_add(struct net_device *dev,
4291 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
4292{
4293 struct vxlan_dev *vxlan = netdev_priv(dev);
4c59b7d1 4294 struct netlink_ext_ack *extack;
fe1e0713 4295 u32 hash_index;
5728ae0d
PM		 4296 int err;
4297
fe1e0713 4298 hash_index = fdb_head_index(vxlan, fdb_info->eth_addr, fdb_info->vni);
4c59b7d1
PM		 4299 extack = switchdev_notifier_info_to_extack(&fdb_info->info);
4300
fe1e0713 4301 spin_lock_bh(&vxlan->hash_lock[hash_index]);
5728ae0d
PM		 4302 err = vxlan_fdb_update(vxlan, fdb_info->eth_addr, &fdb_info->remote_ip,
4303 NUD_REACHABLE,
4304 NLM_F_CREATE | NLM_F_REPLACE,
4305 fdb_info->remote_port,
4306 fdb_info->vni,
4307 fdb_info->remote_vni,
4308 fdb_info->remote_ifindex,
4309 NTF_USE | NTF_SELF | NTF_EXT_LEARNED,
4c59b7d1 4310 false, extack);
fe1e0713 4311 spin_unlock_bh(&vxlan->hash_lock[hash_index]);
5728ae0d
PM		 4312
4313 return err;
4314}
4315
4316static int
4317vxlan_fdb_external_learn_del(struct net_device *dev,
4318 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
4319{
4320 struct vxlan_dev *vxlan = netdev_priv(dev);
4321 struct vxlan_fdb *f;
fe1e0713 4322 u32 hash_index;
5728ae0d
PM		 4323 int err = 0;
4324
fe1e0713
L		 4325 hash_index = fdb_head_index(vxlan, fdb_info->eth_addr, fdb_info->vni);
4326 spin_lock_bh(&vxlan->hash_lock[hash_index]);
5728ae0d
PM		 4327
4328 f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni);
4329 if (!f)
4330 err = -ENOENT;
4331 else if (f->flags & NTF_EXT_LEARNED)
4332 err = __vxlan_fdb_delete(vxlan, fdb_info->eth_addr,
4333 fdb_info->remote_ip,
4334 fdb_info->remote_port,
4335 fdb_info->vni,
4336 fdb_info->remote_vni,
4337 fdb_info->remote_ifindex,
4338 false);
4339
fe1e0713 4340 spin_unlock_bh(&vxlan->hash_lock[hash_index]);
5728ae0d
PM		 4341
4342 return err;
4343}
4344
0efe1173
PM		 4345static int vxlan_switchdev_event(struct notifier_block *unused,
4346 unsigned long event, void *ptr)
4347{
4348 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
5728ae0d
PM		 4349 struct switchdev_notifier_vxlan_fdb_info *fdb_info;
4350 int err = 0;
0efe1173
PM		 4351
4352 switch (event) {
4353 case SWITCHDEV_VXLAN_FDB_OFFLOADED:
4354 vxlan_fdb_offloaded_set(dev, ptr);
4355 break;
5728ae0d
PM		 4356 case SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE:
4357 fdb_info = ptr;
4358 err = vxlan_fdb_external_learn_add(dev, fdb_info);
4359 if (err) {
4360 err = notifier_from_errno(err);
4361 break;
4362 }
4363 fdb_info->offloaded = true;
4364 vxlan_fdb_offloaded_set(dev, fdb_info);
4365 break;
4366 case SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE:
4367 fdb_info = ptr;
4368 err = vxlan_fdb_external_learn_del(dev, fdb_info);
4369 if (err) {
4370 err = notifier_from_errno(err);
4371 break;
4372 }
4373 fdb_info->offloaded = false;
4374 vxlan_fdb_offloaded_set(dev, fdb_info);
4375 break;
0efe1173
PM		 4376 }
4377
5728ae0d 4378 return err;
0efe1173
PM		 4379}
4380
4381static struct notifier_block vxlan_switchdev_notifier_block __read_mostly = {
4382 .notifier_call = vxlan_switchdev_event,
4383};
4384
d342894c 4385static __net_init int vxlan_init_net(struct net *net)
4386{
4387 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
31fec5aa 4388 unsigned int h;
d342894c 4389
553675fb 4390 INIT_LIST_HEAD(&vn->vxlan_list);
1c51a915 4391 spin_lock_init(&vn->sock_lock);
d342894c 4392
553675fb 4393 for (h = 0; h < PORT_HASH_SIZE; ++h)
4394 INIT_HLIST_HEAD(&vn->sock_list[h]);
d342894c 4395
4396 return 0;
4397}
4398
57b61127 4399static void vxlan_destroy_tunnels(struct net *net, struct list_head *head)
f01ec1c0
ND		 4400{
4401 struct vxlan_net *vn = net_generic(net, vxlan_net_id);
4402 struct vxlan_dev *vxlan, *next;
4403 struct net_device *dev, *aux;
0e4ec5ac 4404 unsigned int h;
f01ec1c0 4405
f01ec1c0
ND		 4406 for_each_netdev_safe(net, dev, aux)
4407 if (dev->rtnl_link_ops == &vxlan_link_ops)
57b61127 4408 unregister_netdevice_queue(dev, head);
f01ec1c0
ND		 4409
4410 list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
4411 /* If vxlan->dev is in the same netns, it has already been added
4412 * to the list by the previous loop.
4413 */
cc4807bb 4414 if (!net_eq(dev_net(vxlan->dev), net))
57b61127 4415 unregister_netdevice_queue(vxlan->dev, head);
f01ec1c0
ND		 4416 }
4417
0e4ec5ac
VA		 4418 for (h = 0; h < PORT_HASH_SIZE; ++h)
4419 WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h]));
f01ec1c0
ND		 4420}
4421
57b61127
HY		 4422static void __net_exit vxlan_exit_batch_net(struct list_head *net_list)
4423{
4424 struct net *net;
4425 LIST_HEAD(list);
4426
4427 rtnl_lock();
4428 list_for_each_entry(net, net_list, exit_list)
4429 vxlan_destroy_tunnels(net, &list);
4430
4431 unregister_netdevice_many(&list);
4432 rtnl_unlock();
4433}
4434
d342894c 4435static struct pernet_operations vxlan_net_ops = {
4436 .init = vxlan_init_net,
57b61127 4437 .exit_batch = vxlan_exit_batch_net,
d342894c 4438 .id = &vxlan_net_id,
4439 .size = sizeof(struct vxlan_net),
4440};
4441
4442static int __init vxlan_init_module(void)
4443{
4444 int rc;
4445
4446 get_random_bytes(&vxlan_salt, sizeof(vxlan_salt));
4447
783c1463 4448 rc = register_pernet_subsys(&vxlan_net_ops);
d342894c 4449 if (rc)
4450 goto out1;
4451
acaf4e70 4452 rc = register_netdevice_notifier(&vxlan_notifier_block);
d342894c 4453 if (rc)
4454 goto out2;
4455
0efe1173 4456 rc = register_switchdev_notifier(&vxlan_switchdev_notifier_block);
acaf4e70
DB		 4457 if (rc)
4458 goto out3;
d342894c 4459
0efe1173
PM		 4460 rc = rtnl_link_register(&vxlan_link_ops);
4461 if (rc)
4462 goto out4;
4463
acaf4e70 4464 return 0;
0efe1173
PM		 4465out4:
4466 unregister_switchdev_notifier(&vxlan_switchdev_notifier_block);
acaf4e70
DB		 4467out3:
4468 unregister_netdevice_notifier(&vxlan_notifier_block);
d342894c 4469out2:
783c1463 4470 unregister_pernet_subsys(&vxlan_net_ops);
d342894c 4471out1:
4472 return rc;
4473}
7332a13b 4474late_initcall(vxlan_init_module);
d342894c 4475
4476static void __exit vxlan_cleanup_module(void)
4477{
b7153984 4478 rtnl_link_unregister(&vxlan_link_ops);
0efe1173 4479 unregister_switchdev_notifier(&vxlan_switchdev_notifier_block);
acaf4e70 4480 unregister_netdevice_notifier(&vxlan_notifier_block);
783c1463
DB		 4481 unregister_pernet_subsys(&vxlan_net_ops);
4482 /* rcu_barrier() is called by netns */
d342894c 4483}
4484module_exit(vxlan_cleanup_module);
4485
4486MODULE_LICENSE("GPL");
4487MODULE_VERSION(VXLAN_VERSION);
3b8df3c6 4488MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>");
ead5139a 4489MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic");
d342894c 4490MODULE_ALIAS_RTNL_LINK("vxlan");
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