Commit | Line | Data |
---|---|---|
d342894c | 1 | /* |
eb5ce439 | 2 | * VXLAN: Virtual eXtensible Local Area Network |
d342894c | 3 | * |
3b8df3c6 | 4 | * Copyright (c) 2012-2013 Vyatta Inc. |
d342894c | 5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
d342894c | 9 | */ |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/rculist.h> | |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/in.h> | |
22 | #include <linux/ip.h> | |
23 | #include <linux/udp.h> | |
24 | #include <linux/igmp.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/if_ether.h> | |
1eaa8178 | 27 | #include <linux/if_vlan.h> |
d342894c | 28 | #include <linux/hash.h> |
1b13c97f | 29 | #include <linux/ethtool.h> |
e4f67add DS |
30 | #include <net/arp.h> |
31 | #include <net/ndisc.h> | |
d342894c | 32 | #include <net/ip.h> |
c5441932 | 33 | #include <net/ip_tunnels.h> |
d342894c | 34 | #include <net/icmp.h> |
35 | #include <net/udp.h> | |
36 | #include <net/rtnetlink.h> | |
37 | #include <net/route.h> | |
38 | #include <net/dsfield.h> | |
39 | #include <net/inet_ecn.h> | |
40 | #include <net/net_namespace.h> | |
41 | #include <net/netns/generic.h> | |
012a5729 | 42 | #include <net/vxlan.h> |
e4c7ed41 CW |
43 | #if IS_ENABLED(CONFIG_IPV6) |
44 | #include <net/ipv6.h> | |
45 | #include <net/addrconf.h> | |
46 | #include <net/ip6_tunnel.h> | |
660d98ca | 47 | #include <net/ip6_checksum.h> |
e4c7ed41 | 48 | #endif |
d342894c | 49 | |
50 | #define VXLAN_VERSION "0.1" | |
51 | ||
553675fb | 52 | #define PORT_HASH_BITS 8 |
53 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 54 | #define VNI_HASH_BITS 10 |
55 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
56 | #define FDB_HASH_BITS 8 | |
57 | #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) | |
58 | #define FDB_AGE_DEFAULT 300 /* 5 min */ | |
59 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
60 | ||
61 | #define VXLAN_N_VID (1u << 24) | |
62 | #define VXLAN_VID_MASK (VXLAN_N_VID - 1) | |
7ce04758 | 63 | #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) |
d342894c | 64 | |
65 | #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */ | |
66 | ||
67 | /* VXLAN protocol header */ | |
68 | struct vxlanhdr { | |
69 | __be32 vx_flags; | |
70 | __be32 vx_vni; | |
71 | }; | |
72 | ||
23c578bf | 73 | /* UDP port for VXLAN traffic. |
74 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 75 | * for compatibility with early adopters. |
23c578bf | 76 | */ |
9daaa397 SH |
77 | static unsigned short vxlan_port __read_mostly = 8472; |
78 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 79 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
80 | ||
81 | static bool log_ecn_error = true; | |
82 | module_param(log_ecn_error, bool, 0644); | |
83 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
84 | ||
60d9d4c6 | 85 | static int vxlan_net_id; |
553675fb | 86 | |
afbd8bae MR |
87 | static const u8 all_zeros_mac[ETH_ALEN]; |
88 | ||
553675fb | 89 | /* per-network namespace private data for this module */ |
90 | struct vxlan_net { | |
91 | struct list_head vxlan_list; | |
92 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 93 | spinlock_t sock_lock; |
553675fb | 94 | }; |
95 | ||
e4c7ed41 CW |
96 | union vxlan_addr { |
97 | struct sockaddr_in sin; | |
98 | struct sockaddr_in6 sin6; | |
99 | struct sockaddr sa; | |
100 | }; | |
101 | ||
6681712d | 102 | struct vxlan_rdst { |
e4c7ed41 | 103 | union vxlan_addr remote_ip; |
6681712d DS |
104 | __be16 remote_port; |
105 | u32 remote_vni; | |
106 | u32 remote_ifindex; | |
3e61aa8f | 107 | struct list_head list; |
bc7892ba | 108 | struct rcu_head rcu; |
6681712d DS |
109 | }; |
110 | ||
d342894c | 111 | /* Forwarding table entry */ |
112 | struct vxlan_fdb { | |
113 | struct hlist_node hlist; /* linked list of entries */ | |
114 | struct rcu_head rcu; | |
115 | unsigned long updated; /* jiffies */ | |
116 | unsigned long used; | |
3e61aa8f | 117 | struct list_head remotes; |
d342894c | 118 | u16 state; /* see ndm_state */ |
ae884082 | 119 | u8 flags; /* see ndm_flags */ |
d342894c | 120 | u8 eth_addr[ETH_ALEN]; |
121 | }; | |
122 | ||
d342894c | 123 | /* Pseudo network device */ |
124 | struct vxlan_dev { | |
553675fb | 125 | struct hlist_node hlist; /* vni hash table */ |
126 | struct list_head next; /* vxlan's per namespace list */ | |
127 | struct vxlan_sock *vn_sock; /* listening socket */ | |
d342894c | 128 | struct net_device *dev; |
c7995c43 | 129 | struct vxlan_rdst default_dst; /* default destination */ |
e4c7ed41 | 130 | union vxlan_addr saddr; /* source address */ |
823aa873 | 131 | __be16 dst_port; |
05f47d69 | 132 | __u16 port_min; /* source port range */ |
133 | __u16 port_max; | |
d342894c | 134 | __u8 tos; /* TOS override */ |
135 | __u8 ttl; | |
e4f67add | 136 | u32 flags; /* VXLAN_F_* below */ |
d342894c | 137 | |
1c51a915 | 138 | struct work_struct sock_work; |
3fc2de2f | 139 | struct work_struct igmp_join; |
140 | struct work_struct igmp_leave; | |
1c51a915 | 141 | |
d342894c | 142 | unsigned long age_interval; |
143 | struct timer_list age_timer; | |
144 | spinlock_t hash_lock; | |
145 | unsigned int addrcnt; | |
146 | unsigned int addrmax; | |
d342894c | 147 | |
148 | struct hlist_head fdb_head[FDB_HASH_SIZE]; | |
149 | }; | |
150 | ||
e4f67add DS |
151 | #define VXLAN_F_LEARN 0x01 |
152 | #define VXLAN_F_PROXY 0x02 | |
153 | #define VXLAN_F_RSC 0x04 | |
154 | #define VXLAN_F_L2MISS 0x08 | |
155 | #define VXLAN_F_L3MISS 0x10 | |
e4c7ed41 | 156 | #define VXLAN_F_IPV6 0x20 /* internal flag */ |
e4f67add | 157 | |
d342894c | 158 | /* salt for hash table */ |
159 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 160 | static struct workqueue_struct *vxlan_wq; |
d342894c | 161 | |
1c51a915 SH |
162 | static void vxlan_sock_work(struct work_struct *work); |
163 | ||
e4c7ed41 CW |
164 | #if IS_ENABLED(CONFIG_IPV6) |
165 | static inline | |
166 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
167 | { | |
168 | if (a->sa.sa_family != b->sa.sa_family) | |
169 | return false; | |
170 | if (a->sa.sa_family == AF_INET6) | |
171 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
172 | else | |
173 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
174 | } | |
175 | ||
176 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
177 | { | |
178 | if (ipa->sa.sa_family == AF_INET6) | |
179 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
180 | else | |
181 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
182 | } | |
183 | ||
184 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
185 | { | |
186 | if (ipa->sa.sa_family == AF_INET6) | |
187 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
188 | else | |
189 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
190 | } | |
191 | ||
192 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
193 | { | |
194 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
195 | nla_memcpy(&ip->sin6.sin6_addr, nla, sizeof(struct in6_addr)); | |
196 | ip->sa.sa_family = AF_INET6; | |
197 | return 0; | |
198 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
199 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
200 | ip->sa.sa_family = AF_INET; | |
201 | return 0; | |
202 | } else { | |
203 | return -EAFNOSUPPORT; | |
204 | } | |
205 | } | |
206 | ||
207 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
208 | const union vxlan_addr *ip) | |
209 | { | |
210 | if (ip->sa.sa_family == AF_INET6) | |
211 | return nla_put(skb, attr, sizeof(struct in6_addr), &ip->sin6.sin6_addr); | |
212 | else | |
213 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
214 | } | |
215 | ||
216 | #else /* !CONFIG_IPV6 */ | |
217 | ||
218 | static inline | |
219 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
220 | { | |
221 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
222 | } | |
223 | ||
224 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
225 | { | |
226 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
227 | } | |
228 | ||
229 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
230 | { | |
231 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
232 | } | |
233 | ||
234 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
235 | { | |
236 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
237 | return -EAFNOSUPPORT; | |
238 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
239 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
240 | ip->sa.sa_family = AF_INET; | |
241 | return 0; | |
242 | } else { | |
243 | return -EAFNOSUPPORT; | |
244 | } | |
245 | } | |
246 | ||
247 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
248 | const union vxlan_addr *ip) | |
249 | { | |
250 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
251 | } | |
252 | #endif | |
253 | ||
553675fb | 254 | /* Virtual Network hash table head */ |
255 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
256 | { | |
257 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
258 | } | |
259 | ||
260 | /* Socket hash table head */ | |
261 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 262 | { |
263 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
264 | ||
553675fb | 265 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
266 | } | |
267 | ||
3e61aa8f SH |
268 | /* First remote destination for a forwarding entry. |
269 | * Guaranteed to be non-NULL because remotes are never deleted. | |
270 | */ | |
5ca5461c | 271 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 272 | { |
5ca5461c | 273 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
274 | } | |
275 | ||
276 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
277 | { | |
278 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
279 | } |
280 | ||
553675fb | 281 | /* Find VXLAN socket based on network namespace and UDP port */ |
9c2e24e1 | 282 | static struct vxlan_sock *vxlan_find_sock(struct net *net, __be16 port) |
553675fb | 283 | { |
284 | struct vxlan_sock *vs; | |
285 | ||
286 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
287 | if (inet_sk(vs->sock->sk)->inet_sport == port) | |
288 | return vs; | |
289 | } | |
290 | return NULL; | |
d342894c | 291 | } |
292 | ||
5cfccc5a | 293 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id) |
d342894c | 294 | { |
295 | struct vxlan_dev *vxlan; | |
d342894c | 296 | |
553675fb | 297 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { |
c7995c43 | 298 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 299 | return vxlan; |
300 | } | |
301 | ||
302 | return NULL; | |
303 | } | |
304 | ||
5cfccc5a PS |
305 | /* Look up VNI in a per net namespace table */ |
306 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, __be16 port) | |
307 | { | |
308 | struct vxlan_sock *vs; | |
309 | ||
310 | vs = vxlan_find_sock(net, port); | |
311 | if (!vs) | |
312 | return NULL; | |
313 | ||
314 | return vxlan_vs_find_vni(vs, id); | |
315 | } | |
316 | ||
d342894c | 317 | /* Fill in neighbour message in skbuff. */ |
318 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
319 | const struct vxlan_fdb *fdb, |
320 | u32 portid, u32 seq, int type, unsigned int flags, | |
321 | const struct vxlan_rdst *rdst) | |
d342894c | 322 | { |
323 | unsigned long now = jiffies; | |
324 | struct nda_cacheinfo ci; | |
325 | struct nlmsghdr *nlh; | |
326 | struct ndmsg *ndm; | |
e4f67add | 327 | bool send_ip, send_eth; |
d342894c | 328 | |
329 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
330 | if (nlh == NULL) | |
331 | return -EMSGSIZE; | |
332 | ||
333 | ndm = nlmsg_data(nlh); | |
334 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
335 | |
336 | send_eth = send_ip = true; | |
337 | ||
338 | if (type == RTM_GETNEIGH) { | |
339 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 340 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
341 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
342 | } else | |
343 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 344 | ndm->ndm_state = fdb->state; |
345 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 346 | ndm->ndm_flags = fdb->flags; |
d342894c | 347 | ndm->ndm_type = NDA_DST; |
348 | ||
e4f67add | 349 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 350 | goto nla_put_failure; |
351 | ||
e4c7ed41 | 352 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
353 | goto nla_put_failure; |
354 | ||
823aa873 | 355 | if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && |
6681712d DS |
356 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
357 | goto nla_put_failure; | |
c7995c43 | 358 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 359 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
360 | goto nla_put_failure; |
361 | if (rdst->remote_ifindex && | |
362 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 363 | goto nla_put_failure; |
364 | ||
365 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
366 | ci.ndm_confirmed = 0; | |
367 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
368 | ci.ndm_refcnt = 0; | |
369 | ||
370 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
371 | goto nla_put_failure; | |
372 | ||
373 | return nlmsg_end(skb, nlh); | |
374 | ||
375 | nla_put_failure: | |
376 | nlmsg_cancel(skb, nlh); | |
377 | return -EMSGSIZE; | |
378 | } | |
379 | ||
380 | static inline size_t vxlan_nlmsg_size(void) | |
381 | { | |
382 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
383 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 384 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 385 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
386 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
387 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
d342894c | 388 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
389 | } | |
390 | ||
391 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, | |
3e61aa8f | 392 | struct vxlan_fdb *fdb, int type) |
d342894c | 393 | { |
394 | struct net *net = dev_net(vxlan->dev); | |
395 | struct sk_buff *skb; | |
396 | int err = -ENOBUFS; | |
397 | ||
398 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
399 | if (skb == NULL) | |
400 | goto errout; | |
401 | ||
5ca5461c | 402 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, |
403 | first_remote_rtnl(fdb)); | |
d342894c | 404 | if (err < 0) { |
405 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
406 | WARN_ON(err == -EMSGSIZE); | |
407 | kfree_skb(skb); | |
408 | goto errout; | |
409 | } | |
410 | ||
411 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
412 | return; | |
413 | errout: | |
414 | if (err < 0) | |
415 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
416 | } | |
417 | ||
e4c7ed41 | 418 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
419 | { |
420 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
421 | struct vxlan_fdb f = { |
422 | .state = NUD_STALE, | |
423 | }; | |
424 | struct vxlan_rdst remote = { | |
e4c7ed41 | 425 | .remote_ip = *ipa, /* goes to NDA_DST */ |
bb3fd687 SH |
426 | .remote_vni = VXLAN_N_VID, |
427 | }; | |
3e61aa8f SH |
428 | |
429 | INIT_LIST_HEAD(&f.remotes); | |
430 | list_add_rcu(&remote.list, &f.remotes); | |
e4f67add DS |
431 | |
432 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
433 | } | |
434 | ||
435 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
436 | { | |
bb3fd687 SH |
437 | struct vxlan_fdb f = { |
438 | .state = NUD_STALE, | |
439 | }; | |
e4f67add | 440 | |
3e61aa8f | 441 | INIT_LIST_HEAD(&f.remotes); |
e4f67add DS |
442 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
443 | ||
444 | vxlan_fdb_notify(vxlan, &f, RTM_GETNEIGH); | |
445 | } | |
446 | ||
d342894c | 447 | /* Hash Ethernet address */ |
448 | static u32 eth_hash(const unsigned char *addr) | |
449 | { | |
450 | u64 value = get_unaligned((u64 *)addr); | |
451 | ||
452 | /* only want 6 bytes */ | |
453 | #ifdef __BIG_ENDIAN | |
d342894c | 454 | value >>= 16; |
321fb991 | 455 | #else |
456 | value <<= 16; | |
d342894c | 457 | #endif |
458 | return hash_64(value, FDB_HASH_BITS); | |
459 | } | |
460 | ||
461 | /* Hash chain to use given mac address */ | |
462 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
463 | const u8 *mac) | |
464 | { | |
465 | return &vxlan->fdb_head[eth_hash(mac)]; | |
466 | } | |
467 | ||
468 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 469 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 470 | const u8 *mac) |
471 | ||
472 | { | |
473 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
474 | struct vxlan_fdb *f; | |
d342894c | 475 | |
b67bfe0d | 476 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 477 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 478 | return f; |
479 | } | |
480 | ||
481 | return NULL; | |
482 | } | |
483 | ||
014be2c8 SS |
484 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
485 | const u8 *mac) | |
486 | { | |
487 | struct vxlan_fdb *f; | |
488 | ||
489 | f = __vxlan_find_mac(vxlan, mac); | |
490 | if (f) | |
491 | f->used = jiffies; | |
492 | ||
493 | return f; | |
494 | } | |
495 | ||
a5e7c10a MR |
496 | /* caller should hold vxlan->hash_lock */ |
497 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 498 | union vxlan_addr *ip, __be16 port, |
a5e7c10a | 499 | __u32 vni, __u32 ifindex) |
6681712d | 500 | { |
3e61aa8f | 501 | struct vxlan_rdst *rd; |
6681712d | 502 | |
3e61aa8f | 503 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 504 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
505 | rd->remote_port == port && |
506 | rd->remote_vni == vni && | |
507 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 508 | return rd; |
6681712d | 509 | } |
3e61aa8f | 510 | |
a5e7c10a MR |
511 | return NULL; |
512 | } | |
513 | ||
906dc186 TR |
514 | /* Replace destination of unicast mac */ |
515 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
e4c7ed41 | 516 | union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex) |
906dc186 TR |
517 | { |
518 | struct vxlan_rdst *rd; | |
519 | ||
520 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
521 | if (rd) | |
522 | return 0; | |
523 | ||
524 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
525 | if (!rd) | |
526 | return 0; | |
e4c7ed41 | 527 | rd->remote_ip = *ip; |
906dc186 TR |
528 | rd->remote_port = port; |
529 | rd->remote_vni = vni; | |
530 | rd->remote_ifindex = ifindex; | |
531 | return 1; | |
532 | } | |
533 | ||
a5e7c10a MR |
534 | /* Add/update destinations for multicast */ |
535 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
e4c7ed41 | 536 | union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex) |
a5e7c10a MR |
537 | { |
538 | struct vxlan_rdst *rd; | |
539 | ||
540 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
541 | if (rd) | |
542 | return 0; | |
543 | ||
6681712d DS |
544 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
545 | if (rd == NULL) | |
546 | return -ENOBUFS; | |
e4c7ed41 | 547 | rd->remote_ip = *ip; |
6681712d DS |
548 | rd->remote_port = port; |
549 | rd->remote_vni = vni; | |
550 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
551 | |
552 | list_add_tail_rcu(&rd->list, &f->remotes); | |
553 | ||
6681712d DS |
554 | return 1; |
555 | } | |
556 | ||
53cf5275 JG |
557 | /* Notify netdevs that UDP port started listening */ |
558 | static void vxlan_notify_add_rx_port(struct sock *sk) | |
559 | { | |
560 | struct net_device *dev; | |
561 | struct net *net = sock_net(sk); | |
562 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 563 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
564 | |
565 | rcu_read_lock(); | |
566 | for_each_netdev_rcu(net, dev) { | |
567 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
568 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
569 | port); | |
570 | } | |
571 | rcu_read_unlock(); | |
572 | } | |
573 | ||
574 | /* Notify netdevs that UDP port is no more listening */ | |
575 | static void vxlan_notify_del_rx_port(struct sock *sk) | |
576 | { | |
577 | struct net_device *dev; | |
578 | struct net *net = sock_net(sk); | |
579 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 580 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
581 | |
582 | rcu_read_lock(); | |
583 | for_each_netdev_rcu(net, dev) { | |
584 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
585 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
586 | port); | |
587 | } | |
588 | rcu_read_unlock(); | |
589 | } | |
590 | ||
d342894c | 591 | /* Add new entry to forwarding table -- assumes lock held */ |
592 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 593 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 594 | __u16 state, __u16 flags, |
73cf3317 | 595 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 596 | __u8 ndm_flags) |
d342894c | 597 | { |
598 | struct vxlan_fdb *f; | |
599 | int notify = 0; | |
600 | ||
014be2c8 | 601 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 602 | if (f) { |
603 | if (flags & NLM_F_EXCL) { | |
604 | netdev_dbg(vxlan->dev, | |
605 | "lost race to create %pM\n", mac); | |
606 | return -EEXIST; | |
607 | } | |
608 | if (f->state != state) { | |
609 | f->state = state; | |
610 | f->updated = jiffies; | |
611 | notify = 1; | |
612 | } | |
ae884082 DS |
613 | if (f->flags != ndm_flags) { |
614 | f->flags = ndm_flags; | |
615 | f->updated = jiffies; | |
616 | notify = 1; | |
617 | } | |
906dc186 TR |
618 | if ((flags & NLM_F_REPLACE)) { |
619 | /* Only change unicasts */ | |
620 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
621 | is_zero_ether_addr(f->eth_addr))) { | |
622 | int rc = vxlan_fdb_replace(f, ip, port, vni, | |
623 | ifindex); | |
624 | ||
625 | if (rc < 0) | |
626 | return rc; | |
627 | notify |= rc; | |
628 | } else | |
629 | return -EOPNOTSUPP; | |
630 | } | |
6681712d | 631 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
632 | (is_multicast_ether_addr(f->eth_addr) || |
633 | is_zero_ether_addr(f->eth_addr))) { | |
6681712d DS |
634 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex); |
635 | ||
636 | if (rc < 0) | |
637 | return rc; | |
638 | notify |= rc; | |
639 | } | |
d342894c | 640 | } else { |
641 | if (!(flags & NLM_F_CREATE)) | |
642 | return -ENOENT; | |
643 | ||
644 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
645 | return -ENOSPC; | |
646 | ||
906dc186 TR |
647 | /* Disallow replace to add a multicast entry */ |
648 | if ((flags & NLM_F_REPLACE) && | |
649 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
650 | return -EOPNOTSUPP; | |
651 | ||
e4c7ed41 | 652 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 653 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
654 | if (!f) | |
655 | return -ENOMEM; | |
656 | ||
657 | notify = 1; | |
d342894c | 658 | f->state = state; |
ae884082 | 659 | f->flags = ndm_flags; |
d342894c | 660 | f->updated = f->used = jiffies; |
3e61aa8f | 661 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 662 | memcpy(f->eth_addr, mac, ETH_ALEN); |
663 | ||
3e61aa8f SH |
664 | vxlan_fdb_append(f, ip, port, vni, ifindex); |
665 | ||
d342894c | 666 | ++vxlan->addrcnt; |
667 | hlist_add_head_rcu(&f->hlist, | |
668 | vxlan_fdb_head(vxlan, mac)); | |
669 | } | |
670 | ||
671 | if (notify) | |
672 | vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH); | |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
6706c82e | 677 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
678 | { |
679 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 680 | struct vxlan_rdst *rd, *nd; |
6681712d | 681 | |
3e61aa8f | 682 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 683 | kfree(rd); |
6681712d DS |
684 | kfree(f); |
685 | } | |
686 | ||
d342894c | 687 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
688 | { | |
689 | netdev_dbg(vxlan->dev, | |
690 | "delete %pM\n", f->eth_addr); | |
691 | ||
692 | --vxlan->addrcnt; | |
693 | vxlan_fdb_notify(vxlan, f, RTM_DELNEIGH); | |
694 | ||
695 | hlist_del_rcu(&f->hlist); | |
6681712d | 696 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 697 | } |
698 | ||
f0b074be | 699 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
e4c7ed41 | 700 | union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex) |
d342894c | 701 | { |
6681712d | 702 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 703 | int err; |
d342894c | 704 | |
f0b074be | 705 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
706 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
707 | if (err) | |
708 | return err; | |
f0b074be | 709 | } else { |
e4c7ed41 CW |
710 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
711 | if (remote->sa.sa_family == AF_INET) { | |
712 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
713 | ip->sa.sa_family = AF_INET; | |
714 | #if IS_ENABLED(CONFIG_IPV6) | |
715 | } else { | |
716 | ip->sin6.sin6_addr = in6addr_any; | |
717 | ip->sa.sa_family = AF_INET6; | |
718 | #endif | |
719 | } | |
f0b074be | 720 | } |
d342894c | 721 | |
6681712d | 722 | if (tb[NDA_PORT]) { |
73cf3317 | 723 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 724 | return -EINVAL; |
f0b074be MR |
725 | *port = nla_get_be16(tb[NDA_PORT]); |
726 | } else { | |
727 | *port = vxlan->dst_port; | |
728 | } | |
6681712d DS |
729 | |
730 | if (tb[NDA_VNI]) { | |
731 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
732 | return -EINVAL; | |
f0b074be MR |
733 | *vni = nla_get_u32(tb[NDA_VNI]); |
734 | } else { | |
735 | *vni = vxlan->default_dst.remote_vni; | |
736 | } | |
6681712d DS |
737 | |
738 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 739 | struct net_device *tdev; |
6681712d DS |
740 | |
741 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
742 | return -EINVAL; | |
f0b074be | 743 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 744 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 745 | if (!tdev) |
6681712d | 746 | return -EADDRNOTAVAIL; |
f0b074be MR |
747 | } else { |
748 | *ifindex = 0; | |
749 | } | |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
754 | /* Add static entry (via netlink) */ | |
755 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
756 | struct net_device *dev, | |
757 | const unsigned char *addr, u16 flags) | |
758 | { | |
759 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
760 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 761 | union vxlan_addr ip; |
f0b074be MR |
762 | __be16 port; |
763 | u32 vni, ifindex; | |
764 | int err; | |
765 | ||
766 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
767 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
768 | ndm->ndm_state); | |
769 | return -EINVAL; | |
770 | } | |
771 | ||
772 | if (tb[NDA_DST] == NULL) | |
773 | return -EINVAL; | |
774 | ||
775 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
776 | if (err) | |
777 | return err; | |
6681712d | 778 | |
d342894c | 779 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 780 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 781 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 782 | spin_unlock_bh(&vxlan->hash_lock); |
783 | ||
784 | return err; | |
785 | } | |
786 | ||
787 | /* Delete entry (via netlink) */ | |
1690be63 VY |
788 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
789 | struct net_device *dev, | |
d342894c | 790 | const unsigned char *addr) |
791 | { | |
792 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
793 | struct vxlan_fdb *f; | |
bc7892ba | 794 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 795 | union vxlan_addr ip; |
bc7892ba MR |
796 | __be16 port; |
797 | u32 vni, ifindex; | |
798 | int err; | |
799 | ||
800 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
801 | if (err) | |
802 | return err; | |
803 | ||
804 | err = -ENOENT; | |
d342894c | 805 | |
806 | spin_lock_bh(&vxlan->hash_lock); | |
807 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
808 | if (!f) |
809 | goto out; | |
810 | ||
e4c7ed41 CW |
811 | if (!vxlan_addr_any(&ip)) { |
812 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
813 | if (!rd) |
814 | goto out; | |
815 | } | |
816 | ||
817 | err = 0; | |
818 | ||
819 | /* remove a destination if it's not the only one on the list, | |
820 | * otherwise destroy the fdb entry | |
821 | */ | |
822 | if (rd && !list_is_singular(&f->remotes)) { | |
823 | list_del_rcu(&rd->list); | |
dcdc7a59 | 824 | kfree_rcu(rd, rcu); |
bc7892ba | 825 | goto out; |
d342894c | 826 | } |
bc7892ba MR |
827 | |
828 | vxlan_fdb_destroy(vxlan, f); | |
829 | ||
830 | out: | |
d342894c | 831 | spin_unlock_bh(&vxlan->hash_lock); |
832 | ||
833 | return err; | |
834 | } | |
835 | ||
836 | /* Dump forwarding table */ | |
837 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
838 | struct net_device *dev, int idx) | |
839 | { | |
840 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
841 | unsigned int h; | |
842 | ||
843 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
844 | struct vxlan_fdb *f; | |
d342894c | 845 | int err; |
846 | ||
b67bfe0d | 847 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 848 | struct vxlan_rdst *rd; |
6681712d | 849 | |
3e61aa8f SH |
850 | if (idx < cb->args[0]) |
851 | goto skip; | |
852 | ||
853 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
854 | err = vxlan_fdb_info(skb, vxlan, f, |
855 | NETLINK_CB(cb->skb).portid, | |
856 | cb->nlh->nlmsg_seq, | |
857 | RTM_NEWNEIGH, | |
858 | NLM_F_MULTI, rd); | |
859 | if (err < 0) | |
3e61aa8f | 860 | goto out; |
6681712d | 861 | } |
3e61aa8f SH |
862 | skip: |
863 | ++idx; | |
d342894c | 864 | } |
865 | } | |
3e61aa8f | 866 | out: |
d342894c | 867 | return idx; |
868 | } | |
869 | ||
870 | /* Watch incoming packets to learn mapping between Ethernet address | |
871 | * and Tunnel endpoint. | |
26a41ae6 | 872 | * Return true if packet is bogus and should be droppped. |
d342894c | 873 | */ |
26a41ae6 | 874 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 875 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 876 | { |
877 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
878 | struct vxlan_fdb *f; | |
d342894c | 879 | |
880 | f = vxlan_find_mac(vxlan, src_mac); | |
881 | if (likely(f)) { | |
5ca5461c | 882 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 883 | |
e4c7ed41 | 884 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 885 | return false; |
886 | ||
887 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 888 | if (f->state & NUD_NOARP) |
26a41ae6 | 889 | return true; |
d342894c | 890 | |
891 | if (net_ratelimit()) | |
892 | netdev_info(dev, | |
e4c7ed41 | 893 | "%pM migrated from %pIS to %pIS\n", |
3e61aa8f | 894 | src_mac, &rdst->remote_ip, &src_ip); |
d342894c | 895 | |
e4c7ed41 | 896 | rdst->remote_ip = *src_ip; |
d342894c | 897 | f->updated = jiffies; |
8385f50a | 898 | vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH); |
d342894c | 899 | } else { |
900 | /* learned new entry */ | |
901 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 902 | |
903 | /* close off race between vxlan_flush and incoming packets */ | |
904 | if (netif_running(dev)) | |
905 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
906 | NUD_REACHABLE, | |
907 | NLM_F_EXCL|NLM_F_CREATE, | |
908 | vxlan->dst_port, | |
909 | vxlan->default_dst.remote_vni, | |
910 | 0, NTF_SELF); | |
d342894c | 911 | spin_unlock(&vxlan->hash_lock); |
912 | } | |
26a41ae6 | 913 | |
914 | return false; | |
d342894c | 915 | } |
916 | ||
d342894c | 917 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 918 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 919 | { |
553675fb | 920 | struct vxlan_dev *vxlan; |
d342894c | 921 | |
95ab0991 G |
922 | /* The vxlan_sock is only used by dev, leaving group has |
923 | * no effect on other vxlan devices. | |
924 | */ | |
925 | if (atomic_read(&dev->vn_sock->refcnt) == 1) | |
926 | return false; | |
927 | ||
553675fb | 928 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 929 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 930 | continue; |
d342894c | 931 | |
95ab0991 G |
932 | if (vxlan->vn_sock != dev->vn_sock) |
933 | continue; | |
934 | ||
935 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
936 | &dev->default_dst.remote_ip)) | |
937 | continue; | |
938 | ||
939 | if (vxlan->default_dst.remote_ifindex != | |
940 | dev->default_dst.remote_ifindex) | |
941 | continue; | |
942 | ||
943 | return true; | |
553675fb | 944 | } |
d342894c | 945 | |
946 | return false; | |
947 | } | |
948 | ||
7c47cedf | 949 | static void vxlan_sock_hold(struct vxlan_sock *vs) |
d342894c | 950 | { |
7c47cedf SH |
951 | atomic_inc(&vs->refcnt); |
952 | } | |
d342894c | 953 | |
012a5729 | 954 | void vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 955 | { |
53cf5275 JG |
956 | struct sock *sk = vs->sock->sk; |
957 | struct net *net = sock_net(sk); | |
958 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
012a5729 | 959 | |
7c47cedf SH |
960 | if (!atomic_dec_and_test(&vs->refcnt)) |
961 | return; | |
d342894c | 962 | |
1c51a915 | 963 | spin_lock(&vn->sock_lock); |
7c47cedf | 964 | hlist_del_rcu(&vs->hlist); |
559835ea | 965 | rcu_assign_sk_user_data(vs->sock->sk, NULL); |
53cf5275 | 966 | vxlan_notify_del_rx_port(sk); |
1c51a915 SH |
967 | spin_unlock(&vn->sock_lock); |
968 | ||
7c47cedf | 969 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 970 | } |
012a5729 | 971 | EXPORT_SYMBOL_GPL(vxlan_sock_release); |
d342894c | 972 | |
3fc2de2f | 973 | /* Callback to update multicast group membership when first VNI on |
974 | * multicast asddress is brought up | |
975 | * Done as workqueue because ip_mc_join_group acquires RTNL. | |
7c47cedf | 976 | */ |
3fc2de2f | 977 | static void vxlan_igmp_join(struct work_struct *work) |
d342894c | 978 | { |
3fc2de2f | 979 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_join); |
7c47cedf SH |
980 | struct vxlan_sock *vs = vxlan->vn_sock; |
981 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
982 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
983 | int ifindex = vxlan->default_dst.remote_ifindex; | |
d342894c | 984 | |
d342894c | 985 | lock_sock(sk); |
e4c7ed41 CW |
986 | if (ip->sa.sa_family == AF_INET) { |
987 | struct ip_mreqn mreq = { | |
988 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
989 | .imr_ifindex = ifindex, | |
990 | }; | |
991 | ||
992 | ip_mc_join_group(sk, &mreq); | |
993 | #if IS_ENABLED(CONFIG_IPV6) | |
994 | } else { | |
995 | ipv6_stub->ipv6_sock_mc_join(sk, ifindex, | |
996 | &ip->sin6.sin6_addr); | |
997 | #endif | |
998 | } | |
3fc2de2f | 999 | release_sock(sk); |
1000 | ||
012a5729 | 1001 | vxlan_sock_release(vs); |
3fc2de2f | 1002 | dev_put(vxlan->dev); |
1003 | } | |
1004 | ||
1005 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
1006 | static void vxlan_igmp_leave(struct work_struct *work) | |
1007 | { | |
1008 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_leave); | |
3fc2de2f | 1009 | struct vxlan_sock *vs = vxlan->vn_sock; |
1010 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1011 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1012 | int ifindex = vxlan->default_dst.remote_ifindex; | |
3fc2de2f | 1013 | |
1014 | lock_sock(sk); | |
e4c7ed41 CW |
1015 | if (ip->sa.sa_family == AF_INET) { |
1016 | struct ip_mreqn mreq = { | |
1017 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1018 | .imr_ifindex = ifindex, | |
1019 | }; | |
1020 | ||
1021 | ip_mc_leave_group(sk, &mreq); | |
1022 | #if IS_ENABLED(CONFIG_IPV6) | |
1023 | } else { | |
1024 | ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, | |
1025 | &ip->sin6.sin6_addr); | |
1026 | #endif | |
1027 | } | |
1028 | ||
d342894c | 1029 | release_sock(sk); |
d342894c | 1030 | |
012a5729 | 1031 | vxlan_sock_release(vs); |
7c47cedf | 1032 | dev_put(vxlan->dev); |
d342894c | 1033 | } |
1034 | ||
1035 | /* Callback from net/ipv4/udp.c to receive packets */ | |
1036 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
1037 | { | |
5cfccc5a | 1038 | struct vxlan_sock *vs; |
d342894c | 1039 | struct vxlanhdr *vxh; |
553675fb | 1040 | __be16 port; |
d342894c | 1041 | |
d342894c | 1042 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1043 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 1044 | goto error; |
1045 | ||
7ce04758 PS |
1046 | /* Return packets with reserved bits set */ |
1047 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
d342894c | 1048 | if (vxh->vx_flags != htonl(VXLAN_FLAGS) || |
1049 | (vxh->vx_vni & htonl(0xff))) { | |
1050 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1051 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
1052 | goto error; | |
1053 | } | |
1054 | ||
5cfccc5a PS |
1055 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
1056 | goto drop; | |
1057 | ||
553675fb | 1058 | port = inet_sk(sk)->inet_sport; |
5cfccc5a | 1059 | |
559835ea | 1060 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1061 | if (!vs) |
d342894c | 1062 | goto drop; |
d342894c | 1063 | |
5cfccc5a PS |
1064 | vs->rcv(vs, skb, vxh->vx_vni); |
1065 | return 0; | |
1066 | ||
1067 | drop: | |
1068 | /* Consume bad packet */ | |
1069 | kfree_skb(skb); | |
1070 | return 0; | |
1071 | ||
1072 | error: | |
1073 | /* Return non vxlan pkt */ | |
1074 | return 1; | |
1075 | } | |
1076 | ||
1077 | static void vxlan_rcv(struct vxlan_sock *vs, | |
1078 | struct sk_buff *skb, __be32 vx_vni) | |
1079 | { | |
e4c7ed41 CW |
1080 | struct iphdr *oip = NULL; |
1081 | struct ipv6hdr *oip6 = NULL; | |
5cfccc5a | 1082 | struct vxlan_dev *vxlan; |
8f84985f | 1083 | struct pcpu_sw_netstats *stats; |
e4c7ed41 | 1084 | union vxlan_addr saddr; |
5cfccc5a | 1085 | __u32 vni; |
e4c7ed41 CW |
1086 | int err = 0; |
1087 | union vxlan_addr *remote_ip; | |
5cfccc5a PS |
1088 | |
1089 | vni = ntohl(vx_vni) >> 8; | |
1090 | /* Is this VNI defined? */ | |
1091 | vxlan = vxlan_vs_find_vni(vs, vni); | |
1092 | if (!vxlan) | |
d342894c | 1093 | goto drop; |
d342894c | 1094 | |
e4c7ed41 | 1095 | remote_ip = &vxlan->default_dst.remote_ip; |
e4f67add | 1096 | skb_reset_mac_header(skb); |
d342894c | 1097 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
d342894c | 1098 | |
1099 | /* Ignore packet loops (and multicast echo) */ | |
7367d0b5 | 1100 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) |
d342894c | 1101 | goto drop; |
1102 | ||
7ce04758 | 1103 | /* Re-examine inner Ethernet packet */ |
e4c7ed41 CW |
1104 | if (remote_ip->sa.sa_family == AF_INET) { |
1105 | oip = ip_hdr(skb); | |
1106 | saddr.sin.sin_addr.s_addr = oip->saddr; | |
1107 | saddr.sa.sa_family = AF_INET; | |
1108 | #if IS_ENABLED(CONFIG_IPV6) | |
1109 | } else { | |
1110 | oip6 = ipv6_hdr(skb); | |
1111 | saddr.sin6.sin6_addr = oip6->saddr; | |
1112 | saddr.sa.sa_family = AF_INET6; | |
1113 | #endif | |
1114 | } | |
1115 | ||
26a41ae6 | 1116 | if ((vxlan->flags & VXLAN_F_LEARN) && |
e4c7ed41 | 1117 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) |
26a41ae6 | 1118 | goto drop; |
d342894c | 1119 | |
d342894c | 1120 | skb_reset_network_header(skb); |
0afb1666 JG |
1121 | |
1122 | /* If the NIC driver gave us an encapsulated packet with | |
1123 | * CHECKSUM_UNNECESSARY and Rx checksum feature is enabled, | |
1124 | * leave the CHECKSUM_UNNECESSARY, the device checksummed it | |
1125 | * for us. Otherwise force the upper layers to verify it. | |
1126 | */ | |
1127 | if (skb->ip_summed != CHECKSUM_UNNECESSARY || !skb->encapsulation || | |
1128 | !(vxlan->dev->features & NETIF_F_RXCSUM)) | |
1129 | skb->ip_summed = CHECKSUM_NONE; | |
1130 | ||
1131 | skb->encapsulation = 0; | |
d342894c | 1132 | |
e4c7ed41 CW |
1133 | if (oip6) |
1134 | err = IP6_ECN_decapsulate(oip6, skb); | |
1135 | if (oip) | |
1136 | err = IP_ECN_decapsulate(oip, skb); | |
1137 | ||
d342894c | 1138 | if (unlikely(err)) { |
e4c7ed41 CW |
1139 | if (log_ecn_error) { |
1140 | if (oip6) | |
1141 | net_info_ratelimited("non-ECT from %pI6\n", | |
1142 | &oip6->saddr); | |
1143 | if (oip) | |
1144 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1145 | &oip->saddr, oip->tos); | |
1146 | } | |
d342894c | 1147 | if (err > 1) { |
1148 | ++vxlan->dev->stats.rx_frame_errors; | |
1149 | ++vxlan->dev->stats.rx_errors; | |
1150 | goto drop; | |
1151 | } | |
1152 | } | |
1153 | ||
e8171045 | 1154 | stats = this_cpu_ptr(vxlan->dev->tstats); |
d342894c | 1155 | u64_stats_update_begin(&stats->syncp); |
1156 | stats->rx_packets++; | |
1157 | stats->rx_bytes += skb->len; | |
1158 | u64_stats_update_end(&stats->syncp); | |
1159 | ||
1160 | netif_rx(skb); | |
1161 | ||
5cfccc5a | 1162 | return; |
d342894c | 1163 | drop: |
1164 | /* Consume bad packet */ | |
1165 | kfree_skb(skb); | |
d342894c | 1166 | } |
1167 | ||
e4f67add DS |
1168 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1169 | { | |
1170 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1171 | struct arphdr *parp; | |
1172 | u8 *arpptr, *sha; | |
1173 | __be32 sip, tip; | |
1174 | struct neighbour *n; | |
1175 | ||
1176 | if (dev->flags & IFF_NOARP) | |
1177 | goto out; | |
1178 | ||
1179 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1180 | dev->stats.tx_dropped++; | |
1181 | goto out; | |
1182 | } | |
1183 | parp = arp_hdr(skb); | |
1184 | ||
1185 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1186 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1187 | parp->ar_pro != htons(ETH_P_IP) || | |
1188 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1189 | parp->ar_hln != dev->addr_len || | |
1190 | parp->ar_pln != 4) | |
1191 | goto out; | |
1192 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1193 | sha = arpptr; | |
1194 | arpptr += dev->addr_len; /* sha */ | |
1195 | memcpy(&sip, arpptr, sizeof(sip)); | |
1196 | arpptr += sizeof(sip); | |
1197 | arpptr += dev->addr_len; /* tha */ | |
1198 | memcpy(&tip, arpptr, sizeof(tip)); | |
1199 | ||
1200 | if (ipv4_is_loopback(tip) || | |
1201 | ipv4_is_multicast(tip)) | |
1202 | goto out; | |
1203 | ||
1204 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1205 | ||
1206 | if (n) { | |
e4f67add DS |
1207 | struct vxlan_fdb *f; |
1208 | struct sk_buff *reply; | |
1209 | ||
1210 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1211 | neigh_release(n); | |
1212 | goto out; | |
1213 | } | |
1214 | ||
1215 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1216 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1217 | /* bridge-local neighbor */ |
1218 | neigh_release(n); | |
1219 | goto out; | |
1220 | } | |
1221 | ||
1222 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1223 | n->ha, sha); | |
1224 | ||
1225 | neigh_release(n); | |
1226 | ||
1227 | skb_reset_mac_header(reply); | |
1228 | __skb_pull(reply, skb_network_offset(reply)); | |
1229 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1230 | reply->pkt_type = PACKET_HOST; | |
1231 | ||
1232 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1233 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1234 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1235 | union vxlan_addr ipa = { | |
1236 | .sin.sin_addr.s_addr = tip, | |
1237 | .sa.sa_family = AF_INET, | |
1238 | }; | |
1239 | ||
1240 | vxlan_ip_miss(dev, &ipa); | |
1241 | } | |
e4f67add DS |
1242 | out: |
1243 | consume_skb(skb); | |
1244 | return NETDEV_TX_OK; | |
1245 | } | |
1246 | ||
f564f45c CW |
1247 | #if IS_ENABLED(CONFIG_IPV6) |
1248 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) | |
1249 | { | |
1250 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1251 | struct neighbour *n; | |
1252 | union vxlan_addr ipa; | |
1253 | const struct ipv6hdr *iphdr; | |
1254 | const struct in6_addr *saddr, *daddr; | |
1255 | struct nd_msg *msg; | |
1256 | struct inet6_dev *in6_dev = NULL; | |
1257 | ||
1258 | in6_dev = __in6_dev_get(dev); | |
1259 | if (!in6_dev) | |
1260 | goto out; | |
1261 | ||
1262 | if (!pskb_may_pull(skb, skb->len)) | |
1263 | goto out; | |
1264 | ||
1265 | iphdr = ipv6_hdr(skb); | |
1266 | saddr = &iphdr->saddr; | |
1267 | daddr = &iphdr->daddr; | |
1268 | ||
1269 | if (ipv6_addr_loopback(daddr) || | |
1270 | ipv6_addr_is_multicast(daddr)) | |
1271 | goto out; | |
1272 | ||
1273 | msg = (struct nd_msg *)skb_transport_header(skb); | |
1274 | if (msg->icmph.icmp6_code != 0 || | |
1275 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1276 | goto out; | |
1277 | ||
1278 | n = neigh_lookup(ipv6_stub->nd_tbl, daddr, dev); | |
1279 | ||
1280 | if (n) { | |
1281 | struct vxlan_fdb *f; | |
1282 | ||
1283 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1284 | neigh_release(n); | |
1285 | goto out; | |
1286 | } | |
1287 | ||
1288 | f = vxlan_find_mac(vxlan, n->ha); | |
1289 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1290 | /* bridge-local neighbor */ | |
1291 | neigh_release(n); | |
1292 | goto out; | |
1293 | } | |
1294 | ||
1295 | ipv6_stub->ndisc_send_na(dev, n, saddr, &msg->target, | |
1296 | !!in6_dev->cnf.forwarding, | |
1297 | true, false, false); | |
1298 | neigh_release(n); | |
1299 | } else if (vxlan->flags & VXLAN_F_L3MISS) { | |
1300 | ipa.sin6.sin6_addr = *daddr; | |
1301 | ipa.sa.sa_family = AF_INET6; | |
1302 | vxlan_ip_miss(dev, &ipa); | |
1303 | } | |
1304 | ||
1305 | out: | |
1306 | consume_skb(skb); | |
1307 | return NETDEV_TX_OK; | |
1308 | } | |
1309 | #endif | |
1310 | ||
e4f67add DS |
1311 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1312 | { | |
1313 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1314 | struct neighbour *n; | |
e4f67add DS |
1315 | |
1316 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1317 | return false; | |
1318 | ||
1319 | n = NULL; | |
1320 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1321 | case ETH_P_IP: | |
e15a00aa CW |
1322 | { |
1323 | struct iphdr *pip; | |
1324 | ||
e4f67add DS |
1325 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1326 | return false; | |
1327 | pip = ip_hdr(skb); | |
1328 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1329 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1330 | union vxlan_addr ipa = { | |
1331 | .sin.sin_addr.s_addr = pip->daddr, | |
1332 | .sa.sa_family = AF_INET, | |
1333 | }; | |
1334 | ||
1335 | vxlan_ip_miss(dev, &ipa); | |
1336 | return false; | |
1337 | } | |
1338 | ||
e4f67add | 1339 | break; |
e15a00aa CW |
1340 | } |
1341 | #if IS_ENABLED(CONFIG_IPV6) | |
1342 | case ETH_P_IPV6: | |
1343 | { | |
1344 | struct ipv6hdr *pip6; | |
1345 | ||
1346 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1347 | return false; | |
1348 | pip6 = ipv6_hdr(skb); | |
1349 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1350 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1351 | union vxlan_addr ipa = { | |
1352 | .sin6.sin6_addr = pip6->daddr, | |
1353 | .sa.sa_family = AF_INET6, | |
1354 | }; | |
1355 | ||
1356 | vxlan_ip_miss(dev, &ipa); | |
1357 | return false; | |
1358 | } | |
1359 | ||
1360 | break; | |
1361 | } | |
1362 | #endif | |
e4f67add DS |
1363 | default: |
1364 | return false; | |
1365 | } | |
1366 | ||
1367 | if (n) { | |
1368 | bool diff; | |
1369 | ||
7367d0b5 | 1370 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1371 | if (diff) { |
1372 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1373 | dev->addr_len); | |
1374 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1375 | } | |
1376 | neigh_release(n); | |
1377 | return diff; | |
e4c7ed41 CW |
1378 | } |
1379 | ||
e4f67add DS |
1380 | return false; |
1381 | } | |
1382 | ||
05f47d69 | 1383 | /* Compute source port for outgoing packet |
1384 | * first choice to use L4 flow hash since it will spread | |
1385 | * better and maybe available from hardware | |
1386 | * secondary choice is to use jhash on the Ethernet header | |
1387 | */ | |
49560532 | 1388 | __be16 vxlan_src_port(__u16 port_min, __u16 port_max, struct sk_buff *skb) |
05f47d69 | 1389 | { |
49560532 | 1390 | unsigned int range = (port_max - port_min) + 1; |
05f47d69 | 1391 | u32 hash; |
1392 | ||
3958afa1 | 1393 | hash = skb_get_hash(skb); |
05f47d69 | 1394 | if (!hash) |
1395 | hash = jhash(skb->data, 2 * ETH_ALEN, | |
1396 | (__force u32) skb->protocol); | |
1397 | ||
49560532 | 1398 | return htons((((u64) hash * range) >> 32) + port_min); |
05f47d69 | 1399 | } |
49560532 | 1400 | EXPORT_SYMBOL_GPL(vxlan_src_port); |
05f47d69 | 1401 | |
05c0db08 PS |
1402 | static int handle_offloads(struct sk_buff *skb) |
1403 | { | |
1404 | if (skb_is_gso(skb)) { | |
1405 | int err = skb_unclone(skb, GFP_ATOMIC); | |
1406 | if (unlikely(err)) | |
1407 | return err; | |
1408 | ||
f6ace502 | 1409 | skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL; |
05c0db08 PS |
1410 | } else if (skb->ip_summed != CHECKSUM_PARTIAL) |
1411 | skb->ip_summed = CHECKSUM_NONE; | |
1412 | ||
1413 | return 0; | |
1414 | } | |
1415 | ||
e4c7ed41 | 1416 | #if IS_ENABLED(CONFIG_IPV6) |
11796187 | 1417 | static int vxlan6_xmit_skb(struct vxlan_sock *vs, |
e4c7ed41 CW |
1418 | struct dst_entry *dst, struct sk_buff *skb, |
1419 | struct net_device *dev, struct in6_addr *saddr, | |
1420 | struct in6_addr *daddr, __u8 prio, __u8 ttl, | |
1421 | __be16 src_port, __be16 dst_port, __be32 vni) | |
1422 | { | |
1423 | struct ipv6hdr *ip6h; | |
1424 | struct vxlanhdr *vxh; | |
1425 | struct udphdr *uh; | |
1426 | int min_headroom; | |
1427 | int err; | |
1428 | ||
1429 | if (!skb->encapsulation) { | |
1430 | skb_reset_inner_headers(skb); | |
1431 | skb->encapsulation = 1; | |
1432 | } | |
1433 | ||
963a88b3 ND |
1434 | skb_scrub_packet(skb, false); |
1435 | ||
e4c7ed41 CW |
1436 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
1437 | + VXLAN_HLEN + sizeof(struct ipv6hdr) | |
1438 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
1439 | ||
1440 | /* Need space for new headers (invalidates iph ptr) */ | |
1441 | err = skb_cow_head(skb, min_headroom); | |
1442 | if (unlikely(err)) | |
1443 | return err; | |
1444 | ||
1445 | if (vlan_tx_tag_present(skb)) { | |
1446 | if (WARN_ON(!__vlan_put_tag(skb, | |
1447 | skb->vlan_proto, | |
1448 | vlan_tx_tag_get(skb)))) | |
1449 | return -ENOMEM; | |
1450 | ||
1451 | skb->vlan_tci = 0; | |
1452 | } | |
1453 | ||
1454 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); | |
1455 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1456 | vxh->vx_vni = vni; | |
1457 | ||
1458 | __skb_push(skb, sizeof(*uh)); | |
1459 | skb_reset_transport_header(skb); | |
1460 | uh = udp_hdr(skb); | |
1461 | ||
1462 | uh->dest = dst_port; | |
1463 | uh->source = src_port; | |
1464 | ||
1465 | uh->len = htons(skb->len); | |
1466 | uh->check = 0; | |
1467 | ||
1468 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); | |
1469 | IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | | |
1470 | IPSKB_REROUTED); | |
e4c7ed41 CW |
1471 | skb_dst_set(skb, dst); |
1472 | ||
1473 | if (!skb_is_gso(skb) && !(dst->dev->features & NETIF_F_IPV6_CSUM)) { | |
1474 | __wsum csum = skb_checksum(skb, 0, skb->len, 0); | |
1475 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1476 | uh->check = csum_ipv6_magic(saddr, daddr, skb->len, | |
1477 | IPPROTO_UDP, csum); | |
1478 | if (uh->check == 0) | |
1479 | uh->check = CSUM_MANGLED_0; | |
1480 | } else { | |
1481 | skb->ip_summed = CHECKSUM_PARTIAL; | |
1482 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
1483 | skb->csum_offset = offsetof(struct udphdr, check); | |
1484 | uh->check = ~csum_ipv6_magic(saddr, daddr, | |
1485 | skb->len, IPPROTO_UDP, 0); | |
1486 | } | |
1487 | ||
1488 | __skb_push(skb, sizeof(*ip6h)); | |
1489 | skb_reset_network_header(skb); | |
1490 | ip6h = ipv6_hdr(skb); | |
1491 | ip6h->version = 6; | |
1492 | ip6h->priority = prio; | |
1493 | ip6h->flow_lbl[0] = 0; | |
1494 | ip6h->flow_lbl[1] = 0; | |
1495 | ip6h->flow_lbl[2] = 0; | |
1496 | ip6h->payload_len = htons(skb->len); | |
1497 | ip6h->nexthdr = IPPROTO_UDP; | |
1498 | ip6h->hop_limit = ttl; | |
1499 | ip6h->daddr = *daddr; | |
1500 | ip6h->saddr = *saddr; | |
1501 | ||
e4c7ed41 CW |
1502 | err = handle_offloads(skb); |
1503 | if (err) | |
1504 | return err; | |
1505 | ||
1506 | ip6tunnel_xmit(skb, dev); | |
1507 | return 0; | |
1508 | } | |
1509 | #endif | |
1510 | ||
11796187 | 1511 | int vxlan_xmit_skb(struct vxlan_sock *vs, |
49560532 PS |
1512 | struct rtable *rt, struct sk_buff *skb, |
1513 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, | |
1514 | __be16 src_port, __be16 dst_port, __be32 vni) | |
1515 | { | |
1516 | struct vxlanhdr *vxh; | |
1517 | struct udphdr *uh; | |
649c5b8b | 1518 | int min_headroom; |
49560532 PS |
1519 | int err; |
1520 | ||
1521 | if (!skb->encapsulation) { | |
1522 | skb_reset_inner_headers(skb); | |
1523 | skb->encapsulation = 1; | |
1524 | } | |
1525 | ||
649c5b8b | 1526 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 PS |
1527 | + VXLAN_HLEN + sizeof(struct iphdr) |
1528 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
649c5b8b PS |
1529 | |
1530 | /* Need space for new headers (invalidates iph ptr) */ | |
1531 | err = skb_cow_head(skb, min_headroom); | |
1532 | if (unlikely(err)) | |
1533 | return err; | |
1534 | ||
1eaa8178 PS |
1535 | if (vlan_tx_tag_present(skb)) { |
1536 | if (WARN_ON(!__vlan_put_tag(skb, | |
1537 | skb->vlan_proto, | |
1538 | vlan_tx_tag_get(skb)))) | |
1539 | return -ENOMEM; | |
1540 | ||
1541 | skb->vlan_tci = 0; | |
1542 | } | |
1543 | ||
49560532 PS |
1544 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
1545 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1546 | vxh->vx_vni = vni; | |
1547 | ||
1548 | __skb_push(skb, sizeof(*uh)); | |
1549 | skb_reset_transport_header(skb); | |
1550 | uh = udp_hdr(skb); | |
1551 | ||
1552 | uh->dest = dst_port; | |
1553 | uh->source = src_port; | |
1554 | ||
1555 | uh->len = htons(skb->len); | |
1556 | uh->check = 0; | |
1557 | ||
49560532 PS |
1558 | err = handle_offloads(skb); |
1559 | if (err) | |
1560 | return err; | |
1561 | ||
963a88b3 ND |
1562 | return iptunnel_xmit(rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, |
1563 | false); | |
49560532 PS |
1564 | } |
1565 | EXPORT_SYMBOL_GPL(vxlan_xmit_skb); | |
1566 | ||
9dcc71e1 SS |
1567 | /* Bypass encapsulation if the destination is local */ |
1568 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1569 | struct vxlan_dev *dst_vxlan) | |
1570 | { | |
8f84985f | 1571 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1572 | union vxlan_addr loopback; |
1573 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
9dcc71e1 | 1574 | |
8f84985f LR |
1575 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1576 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1577 | skb->pkt_type = PACKET_HOST; |
1578 | skb->encapsulation = 0; | |
1579 | skb->dev = dst_vxlan->dev; | |
1580 | __skb_pull(skb, skb_network_offset(skb)); | |
1581 | ||
e4c7ed41 CW |
1582 | if (remote_ip->sa.sa_family == AF_INET) { |
1583 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1584 | loopback.sa.sa_family = AF_INET; | |
1585 | #if IS_ENABLED(CONFIG_IPV6) | |
1586 | } else { | |
1587 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1588 | loopback.sa.sa_family = AF_INET6; | |
1589 | #endif | |
1590 | } | |
1591 | ||
9dcc71e1 | 1592 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1593 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1594 | |
1595 | u64_stats_update_begin(&tx_stats->syncp); | |
1596 | tx_stats->tx_packets++; | |
1597 | tx_stats->tx_bytes += skb->len; | |
1598 | u64_stats_update_end(&tx_stats->syncp); | |
1599 | ||
1600 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1601 | u64_stats_update_begin(&rx_stats->syncp); | |
1602 | rx_stats->rx_packets++; | |
1603 | rx_stats->rx_bytes += skb->len; | |
1604 | u64_stats_update_end(&rx_stats->syncp); | |
1605 | } else { | |
1606 | skb->dev->stats.rx_dropped++; | |
1607 | } | |
1608 | } | |
1609 | ||
4ad16930 SH |
1610 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1611 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1612 | { |
1613 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
e4c7ed41 | 1614 | struct rtable *rt = NULL; |
d342894c | 1615 | const struct iphdr *old_iph; |
d342894c | 1616 | struct flowi4 fl4; |
e4c7ed41 CW |
1617 | union vxlan_addr *dst; |
1618 | __be16 src_port = 0, dst_port; | |
234f5b73 | 1619 | u32 vni; |
d342894c | 1620 | __be16 df = 0; |
1621 | __u8 tos, ttl; | |
0e6fbc5b | 1622 | int err; |
d342894c | 1623 | |
823aa873 | 1624 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; |
6681712d | 1625 | vni = rdst->remote_vni; |
e4c7ed41 | 1626 | dst = &rdst->remote_ip; |
e4f67add | 1627 | |
e4c7ed41 | 1628 | if (vxlan_addr_any(dst)) { |
e4f67add | 1629 | if (did_rsc) { |
e4f67add | 1630 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1631 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1632 | return; |
e4f67add | 1633 | } |
ef59febe | 1634 | goto drop; |
e4f67add | 1635 | } |
ef59febe | 1636 | |
d342894c | 1637 | old_iph = ip_hdr(skb); |
1638 | ||
d342894c | 1639 | ttl = vxlan->ttl; |
e4c7ed41 | 1640 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1641 | ttl = 1; |
1642 | ||
1643 | tos = vxlan->tos; | |
1644 | if (tos == 1) | |
206aaafc | 1645 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1646 | |
49560532 | 1647 | src_port = vxlan_src_port(vxlan->port_min, vxlan->port_max, skb); |
d342894c | 1648 | |
e4c7ed41 CW |
1649 | if (dst->sa.sa_family == AF_INET) { |
1650 | memset(&fl4, 0, sizeof(fl4)); | |
1651 | fl4.flowi4_oif = rdst->remote_ifindex; | |
1652 | fl4.flowi4_tos = RT_TOS(tos); | |
1653 | fl4.daddr = dst->sin.sin_addr.s_addr; | |
1654 | fl4.saddr = vxlan->saddr.sin.sin_addr.s_addr; | |
1655 | ||
1656 | rt = ip_route_output_key(dev_net(dev), &fl4); | |
1657 | if (IS_ERR(rt)) { | |
1658 | netdev_dbg(dev, "no route to %pI4\n", | |
1659 | &dst->sin.sin_addr.s_addr); | |
1660 | dev->stats.tx_carrier_errors++; | |
1661 | goto tx_error; | |
1662 | } | |
d342894c | 1663 | |
e4c7ed41 CW |
1664 | if (rt->dst.dev == dev) { |
1665 | netdev_dbg(dev, "circular route to %pI4\n", | |
1666 | &dst->sin.sin_addr.s_addr); | |
1667 | dev->stats.collisions++; | |
fffc15a5 | 1668 | goto rt_tx_error; |
e4c7ed41 CW |
1669 | } |
1670 | ||
1671 | /* Bypass encapsulation if the destination is local */ | |
1672 | if (rt->rt_flags & RTCF_LOCAL && | |
1673 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1674 | struct vxlan_dev *dst_vxlan; | |
1675 | ||
1676 | ip_rt_put(rt); | |
1677 | dst_vxlan = vxlan_find_vni(dev_net(dev), vni, dst_port); | |
1678 | if (!dst_vxlan) | |
1679 | goto tx_error; | |
1680 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1681 | return; | |
1682 | } | |
1683 | ||
1684 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); | |
1685 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
d342894c | 1686 | |
11796187 | 1687 | err = vxlan_xmit_skb(vxlan->vn_sock, rt, skb, |
e4c7ed41 CW |
1688 | fl4.saddr, dst->sin.sin_addr.s_addr, |
1689 | tos, ttl, df, src_port, dst_port, | |
1690 | htonl(vni << 8)); | |
9dcc71e1 | 1691 | |
e4c7ed41 CW |
1692 | if (err < 0) |
1693 | goto rt_tx_error; | |
1694 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
1695 | #if IS_ENABLED(CONFIG_IPV6) | |
1696 | } else { | |
1697 | struct sock *sk = vxlan->vn_sock->sock->sk; | |
1698 | struct dst_entry *ndst; | |
1699 | struct flowi6 fl6; | |
1700 | u32 flags; | |
1701 | ||
1702 | memset(&fl6, 0, sizeof(fl6)); | |
1703 | fl6.flowi6_oif = rdst->remote_ifindex; | |
1704 | fl6.daddr = dst->sin6.sin6_addr; | |
1705 | fl6.saddr = vxlan->saddr.sin6.sin6_addr; | |
8c1bb79f | 1706 | fl6.flowi6_proto = IPPROTO_UDP; |
e4c7ed41 CW |
1707 | |
1708 | if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) { | |
1709 | netdev_dbg(dev, "no route to %pI6\n", | |
1710 | &dst->sin6.sin6_addr); | |
1711 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 1712 | goto tx_error; |
e4c7ed41 | 1713 | } |
d342894c | 1714 | |
e4c7ed41 CW |
1715 | if (ndst->dev == dev) { |
1716 | netdev_dbg(dev, "circular route to %pI6\n", | |
1717 | &dst->sin6.sin6_addr); | |
1718 | dst_release(ndst); | |
1719 | dev->stats.collisions++; | |
1720 | goto tx_error; | |
1721 | } | |
0e6fbc5b | 1722 | |
e4c7ed41 CW |
1723 | /* Bypass encapsulation if the destination is local */ |
1724 | flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
1725 | if (flags & RTF_LOCAL && | |
1726 | !(flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1727 | struct vxlan_dev *dst_vxlan; | |
1728 | ||
1729 | dst_release(ndst); | |
1730 | dst_vxlan = vxlan_find_vni(dev_net(dev), vni, dst_port); | |
1731 | if (!dst_vxlan) | |
1732 | goto tx_error; | |
1733 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1734 | return; | |
1735 | } | |
49560532 | 1736 | |
e4c7ed41 CW |
1737 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
1738 | ||
11796187 | 1739 | err = vxlan6_xmit_skb(vxlan->vn_sock, ndst, skb, |
e4c7ed41 CW |
1740 | dev, &fl6.saddr, &fl6.daddr, 0, ttl, |
1741 | src_port, dst_port, htonl(vni << 8)); | |
1742 | #endif | |
1743 | } | |
0e6fbc5b | 1744 | |
4ad16930 | 1745 | return; |
d342894c | 1746 | |
1747 | drop: | |
1748 | dev->stats.tx_dropped++; | |
1749 | goto tx_free; | |
1750 | ||
49560532 PS |
1751 | rt_tx_error: |
1752 | ip_rt_put(rt); | |
d342894c | 1753 | tx_error: |
1754 | dev->stats.tx_errors++; | |
1755 | tx_free: | |
1756 | dev_kfree_skb(skb); | |
d342894c | 1757 | } |
1758 | ||
6681712d DS |
1759 | /* Transmit local packets over Vxlan |
1760 | * | |
1761 | * Outer IP header inherits ECN and DF from inner header. | |
1762 | * Outer UDP destination is the VXLAN assigned port. | |
1763 | * source port is based on hash of flow | |
1764 | */ | |
1765 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
1766 | { | |
1767 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1768 | struct ethhdr *eth; | |
1769 | bool did_rsc = false; | |
8f646c92 | 1770 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 1771 | struct vxlan_fdb *f; |
6681712d DS |
1772 | |
1773 | skb_reset_mac_header(skb); | |
1774 | eth = eth_hdr(skb); | |
1775 | ||
f564f45c CW |
1776 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
1777 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
1778 | return arp_reduce(dev, skb); | |
1779 | #if IS_ENABLED(CONFIG_IPV6) | |
1780 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
1781 | skb->len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) && | |
1782 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { | |
1783 | struct nd_msg *msg; | |
1784 | ||
1785 | msg = (struct nd_msg *)skb_transport_header(skb); | |
1786 | if (msg->icmph.icmp6_code == 0 && | |
1787 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
1788 | return neigh_reduce(dev, skb); | |
1789 | } | |
1790 | #endif | |
1791 | } | |
6681712d DS |
1792 | |
1793 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
ae884082 DS |
1794 | did_rsc = false; |
1795 | ||
1796 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
1797 | (ntohs(eth->h_proto) == ETH_P_IP || |
1798 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
1799 | did_rsc = route_shortcircuit(dev, skb); |
1800 | if (did_rsc) | |
1801 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
1802 | } | |
1803 | ||
6681712d | 1804 | if (f == NULL) { |
afbd8bae MR |
1805 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
1806 | if (f == NULL) { | |
1807 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
1808 | !is_multicast_ether_addr(eth->h_dest)) | |
1809 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
1810 | ||
1811 | dev->stats.tx_dropped++; | |
8f646c92 | 1812 | kfree_skb(skb); |
afbd8bae MR |
1813 | return NETDEV_TX_OK; |
1814 | } | |
1815 | } | |
6681712d | 1816 | |
afbd8bae MR |
1817 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
1818 | struct sk_buff *skb1; | |
6681712d | 1819 | |
8f646c92 ED |
1820 | if (!fdst) { |
1821 | fdst = rdst; | |
1822 | continue; | |
1823 | } | |
afbd8bae MR |
1824 | skb1 = skb_clone(skb, GFP_ATOMIC); |
1825 | if (skb1) | |
1826 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
1827 | } |
1828 | ||
8f646c92 ED |
1829 | if (fdst) |
1830 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
1831 | else | |
1832 | kfree_skb(skb); | |
4ad16930 | 1833 | return NETDEV_TX_OK; |
6681712d DS |
1834 | } |
1835 | ||
d342894c | 1836 | /* Walk the forwarding table and purge stale entries */ |
1837 | static void vxlan_cleanup(unsigned long arg) | |
1838 | { | |
1839 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
1840 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
1841 | unsigned int h; | |
1842 | ||
1843 | if (!netif_running(vxlan->dev)) | |
1844 | return; | |
1845 | ||
1846 | spin_lock_bh(&vxlan->hash_lock); | |
1847 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1848 | struct hlist_node *p, *n; | |
1849 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1850 | struct vxlan_fdb *f | |
1851 | = container_of(p, struct vxlan_fdb, hlist); | |
1852 | unsigned long timeout; | |
1853 | ||
3c172868 | 1854 | if (f->state & NUD_PERMANENT) |
d342894c | 1855 | continue; |
1856 | ||
1857 | timeout = f->used + vxlan->age_interval * HZ; | |
1858 | if (time_before_eq(timeout, jiffies)) { | |
1859 | netdev_dbg(vxlan->dev, | |
1860 | "garbage collect %pM\n", | |
1861 | f->eth_addr); | |
1862 | f->state = NUD_STALE; | |
1863 | vxlan_fdb_destroy(vxlan, f); | |
1864 | } else if (time_before(timeout, next_timer)) | |
1865 | next_timer = timeout; | |
1866 | } | |
1867 | } | |
1868 | spin_unlock_bh(&vxlan->hash_lock); | |
1869 | ||
1870 | mod_timer(&vxlan->age_timer, next_timer); | |
1871 | } | |
1872 | ||
9c2e24e1 PS |
1873 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
1874 | { | |
1875 | __u32 vni = vxlan->default_dst.remote_vni; | |
1876 | ||
1877 | vxlan->vn_sock = vs; | |
1878 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); | |
1879 | } | |
1880 | ||
d342894c | 1881 | /* Setup stats when device is created */ |
1882 | static int vxlan_init(struct net_device *dev) | |
1883 | { | |
1c51a915 SH |
1884 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1885 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
1886 | struct vxlan_sock *vs; | |
827da44c | 1887 | int i; |
1c51a915 | 1888 | |
8f84985f | 1889 | dev->tstats = alloc_percpu(struct pcpu_sw_netstats); |
e8171045 | 1890 | if (!dev->tstats) |
d342894c | 1891 | return -ENOMEM; |
1892 | ||
827da44c | 1893 | for_each_possible_cpu(i) { |
8f84985f | 1894 | struct pcpu_sw_netstats *vxlan_stats; |
827da44c JS |
1895 | vxlan_stats = per_cpu_ptr(dev->tstats, i); |
1896 | u64_stats_init(&vxlan_stats->syncp); | |
1897 | } | |
1898 | ||
1899 | ||
1c51a915 | 1900 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 1901 | vs = vxlan_find_sock(dev_net(dev), vxlan->dst_port); |
1c51a915 SH |
1902 | if (vs) { |
1903 | /* If we have a socket with same port already, reuse it */ | |
1904 | atomic_inc(&vs->refcnt); | |
9c2e24e1 | 1905 | vxlan_vs_add_dev(vs, vxlan); |
1c51a915 SH |
1906 | } else { |
1907 | /* otherwise make new socket outside of RTNL */ | |
1908 | dev_hold(dev); | |
1909 | queue_work(vxlan_wq, &vxlan->sock_work); | |
1910 | } | |
1911 | spin_unlock(&vn->sock_lock); | |
1912 | ||
d342894c | 1913 | return 0; |
1914 | } | |
1915 | ||
ba609e9b | 1916 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
1917 | { |
1918 | struct vxlan_fdb *f; | |
1919 | ||
1920 | spin_lock_bh(&vxlan->hash_lock); | |
1921 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
1922 | if (f) | |
1923 | vxlan_fdb_destroy(vxlan, f); | |
1924 | spin_unlock_bh(&vxlan->hash_lock); | |
1925 | } | |
1926 | ||
ebf4063e SH |
1927 | static void vxlan_uninit(struct net_device *dev) |
1928 | { | |
1929 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e SH |
1930 | struct vxlan_sock *vs = vxlan->vn_sock; |
1931 | ||
ba609e9b | 1932 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 1933 | |
ebf4063e | 1934 | if (vs) |
012a5729 | 1935 | vxlan_sock_release(vs); |
ebf4063e SH |
1936 | free_percpu(dev->tstats); |
1937 | } | |
1938 | ||
d342894c | 1939 | /* Start ageing timer and join group when device is brought up */ |
1940 | static int vxlan_open(struct net_device *dev) | |
1941 | { | |
1942 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1c51a915 SH |
1943 | struct vxlan_sock *vs = vxlan->vn_sock; |
1944 | ||
1945 | /* socket hasn't been created */ | |
1946 | if (!vs) | |
1947 | return -ENOTCONN; | |
d342894c | 1948 | |
79d4a94f | 1949 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
1c51a915 | 1950 | vxlan_sock_hold(vs); |
7c47cedf | 1951 | dev_hold(dev); |
3fc2de2f | 1952 | queue_work(vxlan_wq, &vxlan->igmp_join); |
d342894c | 1953 | } |
1954 | ||
1955 | if (vxlan->age_interval) | |
1956 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
1957 | ||
1958 | return 0; | |
1959 | } | |
1960 | ||
1961 | /* Purge the forwarding table */ | |
1962 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
1963 | { | |
31fec5aa | 1964 | unsigned int h; |
d342894c | 1965 | |
1966 | spin_lock_bh(&vxlan->hash_lock); | |
1967 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1968 | struct hlist_node *p, *n; | |
1969 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1970 | struct vxlan_fdb *f | |
1971 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
1972 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
1973 | if (!is_zero_ether_addr(f->eth_addr)) | |
1974 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 1975 | } |
1976 | } | |
1977 | spin_unlock_bh(&vxlan->hash_lock); | |
1978 | } | |
1979 | ||
1980 | /* Cleanup timer and forwarding table on shutdown */ | |
1981 | static int vxlan_stop(struct net_device *dev) | |
1982 | { | |
3fc2de2f | 1983 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 1984 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1c51a915 | 1985 | struct vxlan_sock *vs = vxlan->vn_sock; |
d342894c | 1986 | |
e4c7ed41 | 1987 | if (vs && vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
95ab0991 | 1988 | !vxlan_group_used(vn, vxlan)) { |
1c51a915 | 1989 | vxlan_sock_hold(vs); |
7c47cedf | 1990 | dev_hold(dev); |
3fc2de2f | 1991 | queue_work(vxlan_wq, &vxlan->igmp_leave); |
7c47cedf | 1992 | } |
d342894c | 1993 | |
1994 | del_timer_sync(&vxlan->age_timer); | |
1995 | ||
1996 | vxlan_flush(vxlan); | |
1997 | ||
1998 | return 0; | |
1999 | } | |
2000 | ||
d342894c | 2001 | /* Stub, nothing needs to be done. */ |
2002 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2003 | { | |
2004 | } | |
2005 | ||
345010b5 DB |
2006 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2007 | { | |
2008 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2009 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2010 | struct net_device *lowerdev; | |
2011 | int max_mtu; | |
2012 | ||
2013 | lowerdev = __dev_get_by_index(dev_net(dev), dst->remote_ifindex); | |
2014 | if (lowerdev == NULL) | |
2015 | return eth_change_mtu(dev, new_mtu); | |
2016 | ||
2017 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
2018 | max_mtu = lowerdev->mtu - VXLAN6_HEADROOM; | |
2019 | else | |
2020 | max_mtu = lowerdev->mtu - VXLAN_HEADROOM; | |
2021 | ||
2022 | if (new_mtu < 68 || new_mtu > max_mtu) | |
2023 | return -EINVAL; | |
2024 | ||
2025 | dev->mtu = new_mtu; | |
2026 | return 0; | |
2027 | } | |
2028 | ||
d342894c | 2029 | static const struct net_device_ops vxlan_netdev_ops = { |
2030 | .ndo_init = vxlan_init, | |
ebf4063e | 2031 | .ndo_uninit = vxlan_uninit, |
d342894c | 2032 | .ndo_open = vxlan_open, |
2033 | .ndo_stop = vxlan_stop, | |
2034 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2035 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2036 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2037 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2038 | .ndo_validate_addr = eth_validate_addr, |
2039 | .ndo_set_mac_address = eth_mac_addr, | |
2040 | .ndo_fdb_add = vxlan_fdb_add, | |
2041 | .ndo_fdb_del = vxlan_fdb_delete, | |
2042 | .ndo_fdb_dump = vxlan_fdb_dump, | |
2043 | }; | |
2044 | ||
2045 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2046 | static struct device_type vxlan_type = { | |
2047 | .name = "vxlan", | |
2048 | }; | |
2049 | ||
53cf5275 | 2050 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2051 | * supply the listening VXLAN udp ports. Callers are expected |
2052 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2053 | */ |
2054 | void vxlan_get_rx_port(struct net_device *dev) | |
2055 | { | |
2056 | struct vxlan_sock *vs; | |
2057 | struct net *net = dev_net(dev); | |
2058 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2059 | sa_family_t sa_family; | |
35e42379 JG |
2060 | __be16 port; |
2061 | unsigned int i; | |
53cf5275 JG |
2062 | |
2063 | spin_lock(&vn->sock_lock); | |
2064 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2065 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2066 | port = inet_sk(vs->sock->sk)->inet_sport; | |
53cf5275 JG |
2067 | sa_family = vs->sock->sk->sk_family; |
2068 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
2069 | port); | |
2070 | } | |
2071 | } | |
2072 | spin_unlock(&vn->sock_lock); | |
2073 | } | |
2074 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2075 | ||
d342894c | 2076 | /* Initialize the device structure. */ |
2077 | static void vxlan_setup(struct net_device *dev) | |
2078 | { | |
2079 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2080 | unsigned int h; |
05f47d69 | 2081 | int low, high; |
d342894c | 2082 | |
2083 | eth_hw_addr_random(dev); | |
2084 | ether_setup(dev); | |
e4c7ed41 CW |
2085 | if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6) |
2086 | dev->hard_header_len = ETH_HLEN + VXLAN6_HEADROOM; | |
2087 | else | |
2088 | dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM; | |
d342894c | 2089 | |
2090 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 2091 | dev->destructor = free_netdev; |
d342894c | 2092 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2093 | ||
2094 | dev->tx_queue_len = 0; | |
2095 | dev->features |= NETIF_F_LLTX; | |
2096 | dev->features |= NETIF_F_NETNS_LOCAL; | |
d6727fe3 | 2097 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2098 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2099 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2100 | |
1eaa8178 PS |
2101 | dev->vlan_features = dev->features; |
2102 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2103 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2104 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2105 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
d342894c | 2106 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
6602d007 | 2107 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 2108 | |
553675fb | 2109 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2110 | spin_lock_init(&vxlan->hash_lock); |
3fc2de2f | 2111 | INIT_WORK(&vxlan->igmp_join, vxlan_igmp_join); |
2112 | INIT_WORK(&vxlan->igmp_leave, vxlan_igmp_leave); | |
1c51a915 | 2113 | INIT_WORK(&vxlan->sock_work, vxlan_sock_work); |
d342894c | 2114 | |
2115 | init_timer_deferrable(&vxlan->age_timer); | |
2116 | vxlan->age_timer.function = vxlan_cleanup; | |
2117 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2118 | ||
0bbf87d8 | 2119 | inet_get_local_port_range(dev_net(dev), &low, &high); |
05f47d69 | 2120 | vxlan->port_min = low; |
2121 | vxlan->port_max = high; | |
823aa873 | 2122 | vxlan->dst_port = htons(vxlan_port); |
05f47d69 | 2123 | |
d342894c | 2124 | vxlan->dev = dev; |
2125 | ||
2126 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
2127 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2128 | } | |
2129 | ||
2130 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
2131 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2132 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2133 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2134 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2135 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2136 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2137 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2138 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
2139 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
2140 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2141 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2142 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2143 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2144 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2145 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2146 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
823aa873 | 2147 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
d342894c | 2148 | }; |
2149 | ||
2150 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2151 | { | |
2152 | if (tb[IFLA_ADDRESS]) { | |
2153 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2154 | pr_debug("invalid link address (not ethernet)\n"); | |
2155 | return -EINVAL; | |
2156 | } | |
2157 | ||
2158 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2159 | pr_debug("invalid all zero ethernet address\n"); | |
2160 | return -EADDRNOTAVAIL; | |
2161 | } | |
2162 | } | |
2163 | ||
2164 | if (!data) | |
2165 | return -EINVAL; | |
2166 | ||
2167 | if (data[IFLA_VXLAN_ID]) { | |
2168 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2169 | if (id >= VXLAN_VID_MASK) | |
2170 | return -ERANGE; | |
2171 | } | |
2172 | ||
05f47d69 | 2173 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2174 | const struct ifla_vxlan_port_range *p | |
2175 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2176 | ||
2177 | if (ntohs(p->high) < ntohs(p->low)) { | |
2178 | pr_debug("port range %u .. %u not valid\n", | |
2179 | ntohs(p->low), ntohs(p->high)); | |
2180 | return -EINVAL; | |
2181 | } | |
2182 | } | |
2183 | ||
d342894c | 2184 | return 0; |
2185 | } | |
2186 | ||
1b13c97f YB |
2187 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2188 | struct ethtool_drvinfo *drvinfo) | |
2189 | { | |
2190 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2191 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2192 | } | |
2193 | ||
2194 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2195 | .get_drvinfo = vxlan_get_drvinfo, | |
2196 | .get_link = ethtool_op_get_link, | |
2197 | }; | |
2198 | ||
553675fb | 2199 | static void vxlan_del_work(struct work_struct *work) |
2200 | { | |
2201 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
2202 | ||
2203 | sk_release_kernel(vs->sock->sk); | |
2204 | kfree_rcu(vs, rcu); | |
2205 | } | |
2206 | ||
e4c7ed41 CW |
2207 | #if IS_ENABLED(CONFIG_IPV6) |
2208 | /* Create UDP socket for encapsulation receive. AF_INET6 socket | |
2209 | * could be used for both IPv4 and IPv6 communications, but | |
2210 | * users may set bindv6only=1. | |
2211 | */ | |
39deb2c7 | 2212 | static struct socket *create_v6_sock(struct net *net, __be16 port) |
553675fb | 2213 | { |
553675fb | 2214 | struct sock *sk; |
e4c7ed41 CW |
2215 | struct socket *sock; |
2216 | struct sockaddr_in6 vxlan_addr = { | |
2217 | .sin6_family = AF_INET6, | |
2218 | .sin6_port = port, | |
2219 | }; | |
2220 | int rc, val = 1; | |
2221 | ||
2222 | rc = sock_create_kern(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock); | |
2223 | if (rc < 0) { | |
2224 | pr_debug("UDPv6 socket create failed\n"); | |
39deb2c7 | 2225 | return ERR_PTR(rc); |
e4c7ed41 CW |
2226 | } |
2227 | ||
2228 | /* Put in proper namespace */ | |
2229 | sk = sock->sk; | |
2230 | sk_change_net(sk, net); | |
2231 | ||
2232 | kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY, | |
2233 | (char *)&val, sizeof(val)); | |
2234 | rc = kernel_bind(sock, (struct sockaddr *)&vxlan_addr, | |
2235 | sizeof(struct sockaddr_in6)); | |
2236 | if (rc < 0) { | |
2237 | pr_debug("bind for UDPv6 socket %pI6:%u (%d)\n", | |
2238 | &vxlan_addr.sin6_addr, ntohs(vxlan_addr.sin6_port), rc); | |
2239 | sk_release_kernel(sk); | |
39deb2c7 | 2240 | return ERR_PTR(rc); |
e4c7ed41 CW |
2241 | } |
2242 | /* At this point, IPv6 module should have been loaded in | |
2243 | * sock_create_kern(). | |
2244 | */ | |
2245 | BUG_ON(!ipv6_stub); | |
2246 | ||
e4c7ed41 CW |
2247 | /* Disable multicast loopback */ |
2248 | inet_sk(sk)->mc_loop = 0; | |
39deb2c7 | 2249 | return sock; |
e4c7ed41 CW |
2250 | } |
2251 | ||
2252 | #else | |
2253 | ||
39deb2c7 | 2254 | static struct socket *create_v6_sock(struct net *net, __be16 port) |
e4c7ed41 | 2255 | { |
39deb2c7 | 2256 | return ERR_PTR(-EPFNOSUPPORT); |
e4c7ed41 CW |
2257 | } |
2258 | #endif | |
2259 | ||
39deb2c7 | 2260 | static struct socket *create_v4_sock(struct net *net, __be16 port) |
e4c7ed41 CW |
2261 | { |
2262 | struct sock *sk; | |
2263 | struct socket *sock; | |
553675fb | 2264 | struct sockaddr_in vxlan_addr = { |
2265 | .sin_family = AF_INET, | |
2266 | .sin_addr.s_addr = htonl(INADDR_ANY), | |
bb3fd687 | 2267 | .sin_port = port, |
553675fb | 2268 | }; |
2269 | int rc; | |
553675fb | 2270 | |
2271 | /* Create UDP socket for encapsulation receive. */ | |
e4c7ed41 | 2272 | rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock); |
553675fb | 2273 | if (rc < 0) { |
2274 | pr_debug("UDP socket create failed\n"); | |
39deb2c7 | 2275 | return ERR_PTR(rc); |
553675fb | 2276 | } |
2277 | ||
2278 | /* Put in proper namespace */ | |
e4c7ed41 | 2279 | sk = sock->sk; |
553675fb | 2280 | sk_change_net(sk, net); |
2281 | ||
e4c7ed41 | 2282 | rc = kernel_bind(sock, (struct sockaddr *) &vxlan_addr, |
553675fb | 2283 | sizeof(vxlan_addr)); |
2284 | if (rc < 0) { | |
2285 | pr_debug("bind for UDP socket %pI4:%u (%d)\n", | |
2286 | &vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc); | |
2287 | sk_release_kernel(sk); | |
39deb2c7 | 2288 | return ERR_PTR(rc); |
e4c7ed41 CW |
2289 | } |
2290 | ||
e4c7ed41 CW |
2291 | /* Disable multicast loopback */ |
2292 | inet_sk(sk)->mc_loop = 0; | |
39deb2c7 | 2293 | return sock; |
e4c7ed41 CW |
2294 | } |
2295 | ||
2296 | /* Create new listen socket if needed */ | |
2297 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, | |
2298 | vxlan_rcv_t *rcv, void *data, bool ipv6) | |
2299 | { | |
2300 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2301 | struct vxlan_sock *vs; | |
2302 | struct socket *sock; | |
2303 | struct sock *sk; | |
e4c7ed41 CW |
2304 | unsigned int h; |
2305 | ||
2306 | vs = kmalloc(sizeof(*vs), GFP_KERNEL); | |
2307 | if (!vs) | |
2308 | return ERR_PTR(-ENOMEM); | |
2309 | ||
2310 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2311 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2312 | ||
2313 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2314 | ||
2315 | if (ipv6) | |
39deb2c7 | 2316 | sock = create_v6_sock(net, port); |
e4c7ed41 | 2317 | else |
39deb2c7 ZYW |
2318 | sock = create_v4_sock(net, port); |
2319 | if (IS_ERR(sock)) { | |
553675fb | 2320 | kfree(vs); |
e50fddc8 | 2321 | return ERR_CAST(sock); |
553675fb | 2322 | } |
e4c7ed41 CW |
2323 | |
2324 | vs->sock = sock; | |
2325 | sk = sock->sk; | |
9c2e24e1 | 2326 | atomic_set(&vs->refcnt, 1); |
5cfccc5a | 2327 | vs->rcv = rcv; |
012a5729 | 2328 | vs->data = data; |
559835ea | 2329 | rcu_assign_sk_user_data(vs->sock->sk, vs); |
553675fb | 2330 | |
9c2e24e1 PS |
2331 | spin_lock(&vn->sock_lock); |
2332 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
53cf5275 | 2333 | vxlan_notify_add_rx_port(sk); |
9c2e24e1 | 2334 | spin_unlock(&vn->sock_lock); |
553675fb | 2335 | |
2336 | /* Mark socket as an encapsulation socket. */ | |
2337 | udp_sk(sk)->encap_type = 1; | |
2338 | udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; | |
e4c7ed41 CW |
2339 | #if IS_ENABLED(CONFIG_IPV6) |
2340 | if (ipv6) | |
2341 | ipv6_stub->udpv6_encap_enable(); | |
2342 | else | |
2343 | #endif | |
2344 | udp_encap_enable(); | |
2345 | ||
9c2e24e1 PS |
2346 | return vs; |
2347 | } | |
2348 | ||
012a5729 PS |
2349 | struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
2350 | vxlan_rcv_t *rcv, void *data, | |
e4c7ed41 | 2351 | bool no_share, bool ipv6) |
9c2e24e1 PS |
2352 | { |
2353 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2354 | struct vxlan_sock *vs; | |
2355 | ||
e4c7ed41 | 2356 | vs = vxlan_socket_create(net, port, rcv, data, ipv6); |
9c2e24e1 PS |
2357 | if (!IS_ERR(vs)) |
2358 | return vs; | |
553675fb | 2359 | |
012a5729 PS |
2360 | if (no_share) /* Return error if sharing is not allowed. */ |
2361 | return vs; | |
2362 | ||
9c2e24e1 PS |
2363 | spin_lock(&vn->sock_lock); |
2364 | vs = vxlan_find_sock(net, port); | |
5cfccc5a PS |
2365 | if (vs) { |
2366 | if (vs->rcv == rcv) | |
2367 | atomic_inc(&vs->refcnt); | |
2368 | else | |
2369 | vs = ERR_PTR(-EBUSY); | |
2370 | } | |
2371 | spin_unlock(&vn->sock_lock); | |
2372 | ||
2373 | if (!vs) | |
9c2e24e1 PS |
2374 | vs = ERR_PTR(-EINVAL); |
2375 | ||
553675fb | 2376 | return vs; |
2377 | } | |
012a5729 | 2378 | EXPORT_SYMBOL_GPL(vxlan_sock_add); |
553675fb | 2379 | |
1c51a915 SH |
2380 | /* Scheduled at device creation to bind to a socket */ |
2381 | static void vxlan_sock_work(struct work_struct *work) | |
2382 | { | |
9c2e24e1 PS |
2383 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, sock_work); |
2384 | struct net *net = dev_net(vxlan->dev); | |
1c51a915 | 2385 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
9c2e24e1 PS |
2386 | __be16 port = vxlan->dst_port; |
2387 | struct vxlan_sock *nvs; | |
1c51a915 | 2388 | |
e4c7ed41 | 2389 | nvs = vxlan_sock_add(net, port, vxlan_rcv, NULL, false, vxlan->flags & VXLAN_F_IPV6); |
1c51a915 | 2390 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2391 | if (!IS_ERR(nvs)) |
2392 | vxlan_vs_add_dev(nvs, vxlan); | |
2393 | spin_unlock(&vn->sock_lock); | |
2394 | ||
2395 | dev_put(vxlan->dev); | |
1c51a915 SH |
2396 | } |
2397 | ||
d342894c | 2398 | static int vxlan_newlink(struct net *net, struct net_device *dev, |
2399 | struct nlattr *tb[], struct nlattr *data[]) | |
2400 | { | |
553675fb | 2401 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
d342894c | 2402 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 2403 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 2404 | __u32 vni; |
2405 | int err; | |
e4c7ed41 | 2406 | bool use_ipv6 = false; |
d342894c | 2407 | |
2408 | if (!data[IFLA_VXLAN_ID]) | |
2409 | return -EINVAL; | |
2410 | ||
2411 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); | |
c7995c43 | 2412 | dst->remote_vni = vni; |
d342894c | 2413 | |
e4c7ed41 CW |
2414 | if (data[IFLA_VXLAN_GROUP]) { |
2415 | dst->remote_ip.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
2416 | dst->remote_ip.sa.sa_family = AF_INET; | |
2417 | } else if (data[IFLA_VXLAN_GROUP6]) { | |
2418 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2419 | return -EPFNOSUPPORT; | |
2420 | ||
2421 | nla_memcpy(&dst->remote_ip.sin6.sin6_addr, data[IFLA_VXLAN_GROUP6], | |
2422 | sizeof(struct in6_addr)); | |
2423 | dst->remote_ip.sa.sa_family = AF_INET6; | |
2424 | use_ipv6 = true; | |
2425 | } | |
d342894c | 2426 | |
e4c7ed41 CW |
2427 | if (data[IFLA_VXLAN_LOCAL]) { |
2428 | vxlan->saddr.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
2429 | vxlan->saddr.sa.sa_family = AF_INET; | |
2430 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2431 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2432 | return -EPFNOSUPPORT; | |
2433 | ||
2434 | /* TODO: respect scope id */ | |
2435 | nla_memcpy(&vxlan->saddr.sin6.sin6_addr, data[IFLA_VXLAN_LOCAL6], | |
2436 | sizeof(struct in6_addr)); | |
2437 | vxlan->saddr.sa.sa_family = AF_INET6; | |
2438 | use_ipv6 = true; | |
2439 | } | |
d342894c | 2440 | |
34e02aa1 | 2441 | if (data[IFLA_VXLAN_LINK] && |
c7995c43 | 2442 | (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { |
34e02aa1 | 2443 | struct net_device *lowerdev |
c7995c43 | 2444 | = __dev_get_by_index(net, dst->remote_ifindex); |
34e02aa1 | 2445 | |
2446 | if (!lowerdev) { | |
c7995c43 | 2447 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2448 | return -ENODEV; |
2449 | } | |
d342894c | 2450 | |
e4c7ed41 CW |
2451 | #if IS_ENABLED(CONFIG_IPV6) |
2452 | if (use_ipv6) { | |
2453 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2454 | if (idev && idev->cnf.disable_ipv6) { | |
2455 | pr_info("IPv6 is disabled via sysctl\n"); | |
2456 | return -EPERM; | |
2457 | } | |
2458 | vxlan->flags |= VXLAN_F_IPV6; | |
2459 | } | |
2460 | #endif | |
2461 | ||
34e02aa1 | 2462 | if (!tb[IFLA_MTU]) |
e4c7ed41 | 2463 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 AD |
2464 | |
2465 | /* update header length based on lower device */ | |
2466 | dev->hard_header_len = lowerdev->hard_header_len + | |
e4c7ed41 | 2467 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
7bda701e | 2468 | } else if (use_ipv6) |
2469 | vxlan->flags |= VXLAN_F_IPV6; | |
d342894c | 2470 | |
2471 | if (data[IFLA_VXLAN_TOS]) | |
2472 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
2473 | ||
afb97186 VB |
2474 | if (data[IFLA_VXLAN_TTL]) |
2475 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
2476 | ||
d342894c | 2477 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 2478 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 2479 | |
2480 | if (data[IFLA_VXLAN_AGEING]) | |
2481 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
2482 | else | |
2483 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
2484 | ||
e4f67add DS |
2485 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
2486 | vxlan->flags |= VXLAN_F_PROXY; | |
2487 | ||
2488 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
2489 | vxlan->flags |= VXLAN_F_RSC; | |
2490 | ||
2491 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
2492 | vxlan->flags |= VXLAN_F_L2MISS; | |
2493 | ||
2494 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
2495 | vxlan->flags |= VXLAN_F_L3MISS; | |
2496 | ||
d342894c | 2497 | if (data[IFLA_VXLAN_LIMIT]) |
2498 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
2499 | ||
05f47d69 | 2500 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2501 | const struct ifla_vxlan_port_range *p | |
2502 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2503 | vxlan->port_min = ntohs(p->low); | |
2504 | vxlan->port_max = ntohs(p->high); | |
2505 | } | |
2506 | ||
823aa873 | 2507 | if (data[IFLA_VXLAN_PORT]) |
2508 | vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
2509 | ||
553675fb | 2510 | if (vxlan_find_vni(net, vni, vxlan->dst_port)) { |
2511 | pr_info("duplicate VNI %u\n", vni); | |
2512 | return -EEXIST; | |
2513 | } | |
2514 | ||
1b13c97f YB |
2515 | SET_ETHTOOL_OPS(dev, &vxlan_ethtool_ops); |
2516 | ||
2936b6ab SS |
2517 | /* create an fdb entry for a valid default destination */ |
2518 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2519 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2520 | &vxlan->default_dst.remote_ip, | |
2521 | NUD_REACHABLE|NUD_PERMANENT, | |
2522 | NLM_F_EXCL|NLM_F_CREATE, | |
2523 | vxlan->dst_port, | |
2524 | vxlan->default_dst.remote_vni, | |
2525 | vxlan->default_dst.remote_ifindex, | |
2526 | NTF_SELF); | |
2527 | if (err) | |
2528 | return err; | |
2529 | } | |
d342894c | 2530 | |
afbd8bae MR |
2531 | err = register_netdevice(dev); |
2532 | if (err) { | |
ba609e9b | 2533 | vxlan_fdb_delete_default(vxlan); |
afbd8bae MR |
2534 | return err; |
2535 | } | |
2536 | ||
553675fb | 2537 | list_add(&vxlan->next, &vn->vxlan_list); |
553675fb | 2538 | |
2539 | return 0; | |
d342894c | 2540 | } |
2541 | ||
2542 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2543 | { | |
fe5c3561 | 2544 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 2545 | struct vxlan_dev *vxlan = netdev_priv(dev); |
2546 | ||
fe5c3561 | 2547 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2548 | if (!hlist_unhashed(&vxlan->hlist)) |
2549 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 2550 | spin_unlock(&vn->sock_lock); |
2551 | ||
553675fb | 2552 | list_del(&vxlan->next); |
d342894c | 2553 | unregister_netdevice_queue(dev, head); |
2554 | } | |
2555 | ||
2556 | static size_t vxlan_get_size(const struct net_device *dev) | |
2557 | { | |
2558 | ||
2559 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 2560 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 2561 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 2562 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 2563 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
2564 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
2565 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
2566 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
2567 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
2568 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
2569 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 2570 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
2571 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 2572 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
823aa873 | 2573 | nla_total_size(sizeof(__be16))+ /* IFLA_VXLAN_PORT */ |
d342894c | 2574 | 0; |
2575 | } | |
2576 | ||
2577 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
2578 | { | |
2579 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 2580 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 2581 | struct ifla_vxlan_port_range ports = { |
2582 | .low = htons(vxlan->port_min), | |
2583 | .high = htons(vxlan->port_max), | |
2584 | }; | |
d342894c | 2585 | |
c7995c43 | 2586 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 2587 | goto nla_put_failure; |
2588 | ||
e4c7ed41 CW |
2589 | if (!vxlan_addr_any(&dst->remote_ip)) { |
2590 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
2591 | if (nla_put_be32(skb, IFLA_VXLAN_GROUP, | |
2592 | dst->remote_ip.sin.sin_addr.s_addr)) | |
2593 | goto nla_put_failure; | |
2594 | #if IS_ENABLED(CONFIG_IPV6) | |
2595 | } else { | |
2596 | if (nla_put(skb, IFLA_VXLAN_GROUP6, sizeof(struct in6_addr), | |
2597 | &dst->remote_ip.sin6.sin6_addr)) | |
2598 | goto nla_put_failure; | |
2599 | #endif | |
2600 | } | |
2601 | } | |
d342894c | 2602 | |
c7995c43 | 2603 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 2604 | goto nla_put_failure; |
2605 | ||
e4c7ed41 CW |
2606 | if (!vxlan_addr_any(&vxlan->saddr)) { |
2607 | if (vxlan->saddr.sa.sa_family == AF_INET) { | |
2608 | if (nla_put_be32(skb, IFLA_VXLAN_LOCAL, | |
2609 | vxlan->saddr.sin.sin_addr.s_addr)) | |
2610 | goto nla_put_failure; | |
2611 | #if IS_ENABLED(CONFIG_IPV6) | |
2612 | } else { | |
2613 | if (nla_put(skb, IFLA_VXLAN_LOCAL6, sizeof(struct in6_addr), | |
2614 | &vxlan->saddr.sin6.sin6_addr)) | |
2615 | goto nla_put_failure; | |
2616 | #endif | |
2617 | } | |
2618 | } | |
d342894c | 2619 | |
2620 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
2621 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
2622 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
2623 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
2624 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
2625 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
2626 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
2627 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
2628 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
2629 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
2630 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 2631 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
823aa873 | 2632 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || |
2633 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port)) | |
d342894c | 2634 | goto nla_put_failure; |
2635 | ||
05f47d69 | 2636 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
2637 | goto nla_put_failure; | |
2638 | ||
d342894c | 2639 | return 0; |
2640 | ||
2641 | nla_put_failure: | |
2642 | return -EMSGSIZE; | |
2643 | } | |
2644 | ||
2645 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { | |
2646 | .kind = "vxlan", | |
2647 | .maxtype = IFLA_VXLAN_MAX, | |
2648 | .policy = vxlan_policy, | |
2649 | .priv_size = sizeof(struct vxlan_dev), | |
2650 | .setup = vxlan_setup, | |
2651 | .validate = vxlan_validate, | |
2652 | .newlink = vxlan_newlink, | |
2653 | .dellink = vxlan_dellink, | |
2654 | .get_size = vxlan_get_size, | |
2655 | .fill_info = vxlan_fill_info, | |
2656 | }; | |
2657 | ||
acaf4e70 DB |
2658 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
2659 | struct net_device *dev) | |
2660 | { | |
2661 | struct vxlan_dev *vxlan, *next; | |
2662 | LIST_HEAD(list_kill); | |
2663 | ||
2664 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
2665 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2666 | ||
2667 | /* In case we created vxlan device with carrier | |
2668 | * and we loose the carrier due to module unload | |
2669 | * we also need to remove vxlan device. In other | |
2670 | * cases, it's not necessary and remote_ifindex | |
2671 | * is 0 here, so no matches. | |
2672 | */ | |
2673 | if (dst->remote_ifindex == dev->ifindex) | |
2674 | vxlan_dellink(vxlan->dev, &list_kill); | |
2675 | } | |
2676 | ||
2677 | unregister_netdevice_many(&list_kill); | |
2678 | } | |
2679 | ||
2680 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
2681 | unsigned long event, void *ptr) | |
2682 | { | |
2683 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
fd27e0d4 | 2684 | struct vxlan_net *vn; |
acaf4e70 | 2685 | |
fd27e0d4 DB |
2686 | if (event == NETDEV_UNREGISTER) { |
2687 | vn = net_generic(dev_net(dev), vxlan_net_id); | |
acaf4e70 | 2688 | vxlan_handle_lowerdev_unregister(vn, dev); |
fd27e0d4 | 2689 | } |
acaf4e70 DB |
2690 | |
2691 | return NOTIFY_DONE; | |
2692 | } | |
2693 | ||
2694 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
2695 | .notifier_call = vxlan_lowerdev_event, | |
2696 | }; | |
2697 | ||
d342894c | 2698 | static __net_init int vxlan_init_net(struct net *net) |
2699 | { | |
2700 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 2701 | unsigned int h; |
d342894c | 2702 | |
553675fb | 2703 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 2704 | spin_lock_init(&vn->sock_lock); |
d342894c | 2705 | |
553675fb | 2706 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
2707 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 2708 | |
2709 | return 0; | |
2710 | } | |
2711 | ||
2712 | static __net_exit void vxlan_exit_net(struct net *net) | |
2713 | { | |
2714 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
8425783c DB |
2715 | struct vxlan_dev *vxlan, *next; |
2716 | LIST_HEAD(list_kill); | |
9cb6cb7e ZM |
2717 | |
2718 | rtnl_lock(); | |
8425783c DB |
2719 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) |
2720 | vxlan_dellink(vxlan->dev, &list_kill); | |
2721 | unregister_netdevice_many(&list_kill); | |
9cb6cb7e | 2722 | rtnl_unlock(); |
d342894c | 2723 | } |
2724 | ||
2725 | static struct pernet_operations vxlan_net_ops = { | |
2726 | .init = vxlan_init_net, | |
2727 | .exit = vxlan_exit_net, | |
2728 | .id = &vxlan_net_id, | |
2729 | .size = sizeof(struct vxlan_net), | |
2730 | }; | |
2731 | ||
2732 | static int __init vxlan_init_module(void) | |
2733 | { | |
2734 | int rc; | |
2735 | ||
758c57d1 SH |
2736 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
2737 | if (!vxlan_wq) | |
2738 | return -ENOMEM; | |
2739 | ||
d342894c | 2740 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
2741 | ||
2742 | rc = register_pernet_device(&vxlan_net_ops); | |
2743 | if (rc) | |
2744 | goto out1; | |
2745 | ||
acaf4e70 | 2746 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 2747 | if (rc) |
2748 | goto out2; | |
2749 | ||
acaf4e70 DB |
2750 | rc = rtnl_link_register(&vxlan_link_ops); |
2751 | if (rc) | |
2752 | goto out3; | |
d342894c | 2753 | |
acaf4e70 DB |
2754 | return 0; |
2755 | out3: | |
2756 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 2757 | out2: |
2758 | unregister_pernet_device(&vxlan_net_ops); | |
2759 | out1: | |
758c57d1 | 2760 | destroy_workqueue(vxlan_wq); |
d342894c | 2761 | return rc; |
2762 | } | |
7332a13b | 2763 | late_initcall(vxlan_init_module); |
d342894c | 2764 | |
2765 | static void __exit vxlan_cleanup_module(void) | |
2766 | { | |
b7153984 | 2767 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 2768 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 2769 | destroy_workqueue(vxlan_wq); |
f89e57c4 | 2770 | unregister_pernet_device(&vxlan_net_ops); |
6681712d | 2771 | rcu_barrier(); |
d342894c | 2772 | } |
2773 | module_exit(vxlan_cleanup_module); | |
2774 | ||
2775 | MODULE_LICENSE("GPL"); | |
2776 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 2777 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
d342894c | 2778 | MODULE_ALIAS_RTNL_LINK("vxlan"); |