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> |
dc01e7d3 | 43 | #include <net/protocol.h> |
e4c7ed41 CW |
44 | #if IS_ENABLED(CONFIG_IPV6) |
45 | #include <net/ipv6.h> | |
46 | #include <net/addrconf.h> | |
47 | #include <net/ip6_tunnel.h> | |
660d98ca | 48 | #include <net/ip6_checksum.h> |
e4c7ed41 | 49 | #endif |
d342894c | 50 | |
51 | #define VXLAN_VERSION "0.1" | |
52 | ||
553675fb | 53 | #define PORT_HASH_BITS 8 |
54 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 55 | #define VNI_HASH_BITS 10 |
56 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
57 | #define FDB_HASH_BITS 8 | |
58 | #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) | |
59 | #define FDB_AGE_DEFAULT 300 /* 5 min */ | |
60 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
61 | ||
62 | #define VXLAN_N_VID (1u << 24) | |
63 | #define VXLAN_VID_MASK (VXLAN_N_VID - 1) | |
7ce04758 | 64 | #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) |
d342894c | 65 | |
66 | #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */ | |
67 | ||
68 | /* VXLAN protocol header */ | |
69 | struct vxlanhdr { | |
70 | __be32 vx_flags; | |
71 | __be32 vx_vni; | |
72 | }; | |
73 | ||
23c578bf | 74 | /* UDP port for VXLAN traffic. |
75 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 76 | * for compatibility with early adopters. |
23c578bf | 77 | */ |
9daaa397 SH |
78 | static unsigned short vxlan_port __read_mostly = 8472; |
79 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 80 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
81 | ||
82 | static bool log_ecn_error = true; | |
83 | module_param(log_ecn_error, bool, 0644); | |
84 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
85 | ||
60d9d4c6 | 86 | static int vxlan_net_id; |
553675fb | 87 | |
afbd8bae MR |
88 | static const u8 all_zeros_mac[ETH_ALEN]; |
89 | ||
553675fb | 90 | /* per-network namespace private data for this module */ |
91 | struct vxlan_net { | |
92 | struct list_head vxlan_list; | |
93 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 94 | spinlock_t sock_lock; |
553675fb | 95 | }; |
96 | ||
e4c7ed41 CW |
97 | union vxlan_addr { |
98 | struct sockaddr_in sin; | |
99 | struct sockaddr_in6 sin6; | |
100 | struct sockaddr sa; | |
101 | }; | |
102 | ||
6681712d | 103 | struct vxlan_rdst { |
e4c7ed41 | 104 | union vxlan_addr remote_ip; |
6681712d DS |
105 | __be16 remote_port; |
106 | u32 remote_vni; | |
107 | u32 remote_ifindex; | |
3e61aa8f | 108 | struct list_head list; |
bc7892ba | 109 | struct rcu_head rcu; |
6681712d DS |
110 | }; |
111 | ||
d342894c | 112 | /* Forwarding table entry */ |
113 | struct vxlan_fdb { | |
114 | struct hlist_node hlist; /* linked list of entries */ | |
115 | struct rcu_head rcu; | |
116 | unsigned long updated; /* jiffies */ | |
117 | unsigned long used; | |
3e61aa8f | 118 | struct list_head remotes; |
d342894c | 119 | u16 state; /* see ndm_state */ |
ae884082 | 120 | u8 flags; /* see ndm_flags */ |
d342894c | 121 | u8 eth_addr[ETH_ALEN]; |
122 | }; | |
123 | ||
d342894c | 124 | /* Pseudo network device */ |
125 | struct vxlan_dev { | |
553675fb | 126 | struct hlist_node hlist; /* vni hash table */ |
127 | struct list_head next; /* vxlan's per namespace list */ | |
128 | struct vxlan_sock *vn_sock; /* listening socket */ | |
d342894c | 129 | struct net_device *dev; |
c7995c43 | 130 | struct vxlan_rdst default_dst; /* default destination */ |
e4c7ed41 | 131 | union vxlan_addr saddr; /* source address */ |
823aa873 | 132 | __be16 dst_port; |
05f47d69 | 133 | __u16 port_min; /* source port range */ |
134 | __u16 port_max; | |
d342894c | 135 | __u8 tos; /* TOS override */ |
136 | __u8 ttl; | |
e4f67add | 137 | u32 flags; /* VXLAN_F_* below */ |
d342894c | 138 | |
1c51a915 | 139 | struct work_struct sock_work; |
3fc2de2f | 140 | struct work_struct igmp_join; |
141 | struct work_struct igmp_leave; | |
1c51a915 | 142 | |
d342894c | 143 | unsigned long age_interval; |
144 | struct timer_list age_timer; | |
145 | spinlock_t hash_lock; | |
146 | unsigned int addrcnt; | |
147 | unsigned int addrmax; | |
d342894c | 148 | |
149 | struct hlist_head fdb_head[FDB_HASH_SIZE]; | |
150 | }; | |
151 | ||
e4f67add DS |
152 | #define VXLAN_F_LEARN 0x01 |
153 | #define VXLAN_F_PROXY 0x02 | |
154 | #define VXLAN_F_RSC 0x04 | |
155 | #define VXLAN_F_L2MISS 0x08 | |
156 | #define VXLAN_F_L3MISS 0x10 | |
e4c7ed41 | 157 | #define VXLAN_F_IPV6 0x20 /* internal flag */ |
e4f67add | 158 | |
d342894c | 159 | /* salt for hash table */ |
160 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 161 | static struct workqueue_struct *vxlan_wq; |
d342894c | 162 | |
1c51a915 SH |
163 | static void vxlan_sock_work(struct work_struct *work); |
164 | ||
e4c7ed41 CW |
165 | #if IS_ENABLED(CONFIG_IPV6) |
166 | static inline | |
167 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
168 | { | |
169 | if (a->sa.sa_family != b->sa.sa_family) | |
170 | return false; | |
171 | if (a->sa.sa_family == AF_INET6) | |
172 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
173 | else | |
174 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
175 | } | |
176 | ||
177 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
178 | { | |
179 | if (ipa->sa.sa_family == AF_INET6) | |
180 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
181 | else | |
182 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
183 | } | |
184 | ||
185 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
186 | { | |
187 | if (ipa->sa.sa_family == AF_INET6) | |
188 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
189 | else | |
190 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
191 | } | |
192 | ||
193 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
194 | { | |
195 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
196 | nla_memcpy(&ip->sin6.sin6_addr, nla, sizeof(struct in6_addr)); | |
197 | ip->sa.sa_family = AF_INET6; | |
198 | return 0; | |
199 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
200 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
201 | ip->sa.sa_family = AF_INET; | |
202 | return 0; | |
203 | } else { | |
204 | return -EAFNOSUPPORT; | |
205 | } | |
206 | } | |
207 | ||
208 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
209 | const union vxlan_addr *ip) | |
210 | { | |
211 | if (ip->sa.sa_family == AF_INET6) | |
212 | return nla_put(skb, attr, sizeof(struct in6_addr), &ip->sin6.sin6_addr); | |
213 | else | |
214 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
215 | } | |
216 | ||
217 | #else /* !CONFIG_IPV6 */ | |
218 | ||
219 | static inline | |
220 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
221 | { | |
222 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
223 | } | |
224 | ||
225 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
226 | { | |
227 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
228 | } | |
229 | ||
230 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
231 | { | |
232 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
233 | } | |
234 | ||
235 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
236 | { | |
237 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
238 | return -EAFNOSUPPORT; | |
239 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
240 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
241 | ip->sa.sa_family = AF_INET; | |
242 | return 0; | |
243 | } else { | |
244 | return -EAFNOSUPPORT; | |
245 | } | |
246 | } | |
247 | ||
248 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
249 | const union vxlan_addr *ip) | |
250 | { | |
251 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
252 | } | |
253 | #endif | |
254 | ||
553675fb | 255 | /* Virtual Network hash table head */ |
256 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
257 | { | |
258 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
259 | } | |
260 | ||
261 | /* Socket hash table head */ | |
262 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 263 | { |
264 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
265 | ||
553675fb | 266 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
267 | } | |
268 | ||
3e61aa8f SH |
269 | /* First remote destination for a forwarding entry. |
270 | * Guaranteed to be non-NULL because remotes are never deleted. | |
271 | */ | |
5ca5461c | 272 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 273 | { |
5ca5461c | 274 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
275 | } | |
276 | ||
277 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
278 | { | |
279 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
280 | } |
281 | ||
553675fb | 282 | /* Find VXLAN socket based on network namespace and UDP port */ |
9c2e24e1 | 283 | static struct vxlan_sock *vxlan_find_sock(struct net *net, __be16 port) |
553675fb | 284 | { |
285 | struct vxlan_sock *vs; | |
286 | ||
287 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
288 | if (inet_sk(vs->sock->sk)->inet_sport == port) | |
289 | return vs; | |
290 | } | |
291 | return NULL; | |
d342894c | 292 | } |
293 | ||
5cfccc5a | 294 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id) |
d342894c | 295 | { |
296 | struct vxlan_dev *vxlan; | |
d342894c | 297 | |
553675fb | 298 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { |
c7995c43 | 299 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 300 | return vxlan; |
301 | } | |
302 | ||
303 | return NULL; | |
304 | } | |
305 | ||
5cfccc5a PS |
306 | /* Look up VNI in a per net namespace table */ |
307 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, __be16 port) | |
308 | { | |
309 | struct vxlan_sock *vs; | |
310 | ||
311 | vs = vxlan_find_sock(net, port); | |
312 | if (!vs) | |
313 | return NULL; | |
314 | ||
315 | return vxlan_vs_find_vni(vs, id); | |
316 | } | |
317 | ||
d342894c | 318 | /* Fill in neighbour message in skbuff. */ |
319 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
320 | const struct vxlan_fdb *fdb, |
321 | u32 portid, u32 seq, int type, unsigned int flags, | |
322 | const struct vxlan_rdst *rdst) | |
d342894c | 323 | { |
324 | unsigned long now = jiffies; | |
325 | struct nda_cacheinfo ci; | |
326 | struct nlmsghdr *nlh; | |
327 | struct ndmsg *ndm; | |
e4f67add | 328 | bool send_ip, send_eth; |
d342894c | 329 | |
330 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
331 | if (nlh == NULL) | |
332 | return -EMSGSIZE; | |
333 | ||
334 | ndm = nlmsg_data(nlh); | |
335 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
336 | |
337 | send_eth = send_ip = true; | |
338 | ||
339 | if (type == RTM_GETNEIGH) { | |
340 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 341 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
342 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
343 | } else | |
344 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 345 | ndm->ndm_state = fdb->state; |
346 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 347 | ndm->ndm_flags = fdb->flags; |
d342894c | 348 | ndm->ndm_type = NDA_DST; |
349 | ||
e4f67add | 350 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 351 | goto nla_put_failure; |
352 | ||
e4c7ed41 | 353 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
354 | goto nla_put_failure; |
355 | ||
823aa873 | 356 | if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && |
6681712d DS |
357 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
358 | goto nla_put_failure; | |
c7995c43 | 359 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 360 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
361 | goto nla_put_failure; |
362 | if (rdst->remote_ifindex && | |
363 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 364 | goto nla_put_failure; |
365 | ||
366 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
367 | ci.ndm_confirmed = 0; | |
368 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
369 | ci.ndm_refcnt = 0; | |
370 | ||
371 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
372 | goto nla_put_failure; | |
373 | ||
374 | return nlmsg_end(skb, nlh); | |
375 | ||
376 | nla_put_failure: | |
377 | nlmsg_cancel(skb, nlh); | |
378 | return -EMSGSIZE; | |
379 | } | |
380 | ||
381 | static inline size_t vxlan_nlmsg_size(void) | |
382 | { | |
383 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
384 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 385 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 386 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
387 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
388 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
d342894c | 389 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
390 | } | |
391 | ||
9e4b93f9 ND |
392 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
393 | struct vxlan_rdst *rd, int type) | |
d342894c | 394 | { |
395 | struct net *net = dev_net(vxlan->dev); | |
396 | struct sk_buff *skb; | |
397 | int err = -ENOBUFS; | |
398 | ||
399 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
400 | if (skb == NULL) | |
401 | goto errout; | |
402 | ||
9e4b93f9 | 403 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
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 | 428 | |
9e4b93f9 | 429 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
430 | } |
431 | ||
432 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
433 | { | |
bb3fd687 SH |
434 | struct vxlan_fdb f = { |
435 | .state = NUD_STALE, | |
436 | }; | |
9e4b93f9 | 437 | struct vxlan_rdst remote = { }; |
e4f67add | 438 | |
e4f67add DS |
439 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
440 | ||
9e4b93f9 | 441 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
442 | } |
443 | ||
d342894c | 444 | /* Hash Ethernet address */ |
445 | static u32 eth_hash(const unsigned char *addr) | |
446 | { | |
447 | u64 value = get_unaligned((u64 *)addr); | |
448 | ||
449 | /* only want 6 bytes */ | |
450 | #ifdef __BIG_ENDIAN | |
d342894c | 451 | value >>= 16; |
321fb991 | 452 | #else |
453 | value <<= 16; | |
d342894c | 454 | #endif |
455 | return hash_64(value, FDB_HASH_BITS); | |
456 | } | |
457 | ||
458 | /* Hash chain to use given mac address */ | |
459 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
460 | const u8 *mac) | |
461 | { | |
462 | return &vxlan->fdb_head[eth_hash(mac)]; | |
463 | } | |
464 | ||
465 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 466 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 467 | const u8 *mac) |
d342894c | 468 | { |
469 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
470 | struct vxlan_fdb *f; | |
d342894c | 471 | |
b67bfe0d | 472 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 473 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 474 | return f; |
475 | } | |
476 | ||
477 | return NULL; | |
478 | } | |
479 | ||
014be2c8 SS |
480 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
481 | const u8 *mac) | |
482 | { | |
483 | struct vxlan_fdb *f; | |
484 | ||
485 | f = __vxlan_find_mac(vxlan, mac); | |
486 | if (f) | |
487 | f->used = jiffies; | |
488 | ||
489 | return f; | |
490 | } | |
491 | ||
a5e7c10a MR |
492 | /* caller should hold vxlan->hash_lock */ |
493 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 494 | union vxlan_addr *ip, __be16 port, |
a5e7c10a | 495 | __u32 vni, __u32 ifindex) |
6681712d | 496 | { |
3e61aa8f | 497 | struct vxlan_rdst *rd; |
6681712d | 498 | |
3e61aa8f | 499 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 500 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
501 | rd->remote_port == port && |
502 | rd->remote_vni == vni && | |
503 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 504 | return rd; |
6681712d | 505 | } |
3e61aa8f | 506 | |
a5e7c10a MR |
507 | return NULL; |
508 | } | |
509 | ||
906dc186 TR |
510 | /* Replace destination of unicast mac */ |
511 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
e4c7ed41 | 512 | union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex) |
906dc186 TR |
513 | { |
514 | struct vxlan_rdst *rd; | |
515 | ||
516 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
517 | if (rd) | |
518 | return 0; | |
519 | ||
520 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
521 | if (!rd) | |
522 | return 0; | |
e4c7ed41 | 523 | rd->remote_ip = *ip; |
906dc186 TR |
524 | rd->remote_port = port; |
525 | rd->remote_vni = vni; | |
526 | rd->remote_ifindex = ifindex; | |
527 | return 1; | |
528 | } | |
529 | ||
a5e7c10a MR |
530 | /* Add/update destinations for multicast */ |
531 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
9e4b93f9 ND |
532 | union vxlan_addr *ip, __be16 port, __u32 vni, |
533 | __u32 ifindex, struct vxlan_rdst **rdp) | |
a5e7c10a MR |
534 | { |
535 | struct vxlan_rdst *rd; | |
536 | ||
537 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
538 | if (rd) | |
539 | return 0; | |
540 | ||
6681712d DS |
541 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
542 | if (rd == NULL) | |
543 | return -ENOBUFS; | |
e4c7ed41 | 544 | rd->remote_ip = *ip; |
6681712d DS |
545 | rd->remote_port = port; |
546 | rd->remote_vni = vni; | |
547 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
548 | |
549 | list_add_tail_rcu(&rd->list, &f->remotes); | |
550 | ||
9e4b93f9 | 551 | *rdp = rd; |
6681712d DS |
552 | return 1; |
553 | } | |
554 | ||
dc01e7d3 OG |
555 | static struct sk_buff **vxlan_gro_receive(struct sk_buff **head, struct sk_buff *skb) |
556 | { | |
557 | struct sk_buff *p, **pp = NULL; | |
558 | struct vxlanhdr *vh, *vh2; | |
559 | struct ethhdr *eh, *eh2; | |
560 | unsigned int hlen, off_vx, off_eth; | |
561 | const struct packet_offload *ptype; | |
562 | __be16 type; | |
563 | int flush = 1; | |
564 | ||
565 | off_vx = skb_gro_offset(skb); | |
566 | hlen = off_vx + sizeof(*vh); | |
567 | vh = skb_gro_header_fast(skb, off_vx); | |
568 | if (skb_gro_header_hard(skb, hlen)) { | |
569 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
570 | if (unlikely(!vh)) | |
571 | goto out; | |
572 | } | |
573 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ | |
574 | ||
575 | off_eth = skb_gro_offset(skb); | |
576 | hlen = off_eth + sizeof(*eh); | |
577 | eh = skb_gro_header_fast(skb, off_eth); | |
578 | if (skb_gro_header_hard(skb, hlen)) { | |
579 | eh = skb_gro_header_slow(skb, hlen, off_eth); | |
580 | if (unlikely(!eh)) | |
581 | goto out; | |
582 | } | |
583 | ||
584 | flush = 0; | |
585 | ||
586 | for (p = *head; p; p = p->next) { | |
587 | if (!NAPI_GRO_CB(p)->same_flow) | |
588 | continue; | |
589 | ||
590 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
591 | eh2 = (struct ethhdr *)(p->data + off_eth); | |
592 | if (vh->vx_vni != vh2->vx_vni || compare_ether_header(eh, eh2)) { | |
593 | NAPI_GRO_CB(p)->same_flow = 0; | |
594 | continue; | |
595 | } | |
dc01e7d3 OG |
596 | } |
597 | ||
dc01e7d3 OG |
598 | type = eh->h_proto; |
599 | ||
600 | rcu_read_lock(); | |
601 | ptype = gro_find_receive_by_type(type); | |
602 | if (ptype == NULL) { | |
603 | flush = 1; | |
604 | goto out_unlock; | |
605 | } | |
606 | ||
607 | skb_gro_pull(skb, sizeof(*eh)); /* pull inner eth header */ | |
608 | pp = ptype->callbacks.gro_receive(head, skb); | |
609 | ||
610 | out_unlock: | |
611 | rcu_read_unlock(); | |
612 | out: | |
613 | NAPI_GRO_CB(skb)->flush |= flush; | |
614 | ||
615 | return pp; | |
616 | } | |
617 | ||
618 | static int vxlan_gro_complete(struct sk_buff *skb, int nhoff) | |
619 | { | |
620 | struct ethhdr *eh; | |
621 | struct packet_offload *ptype; | |
622 | __be16 type; | |
623 | int vxlan_len = sizeof(struct vxlanhdr) + sizeof(struct ethhdr); | |
624 | int err = -ENOSYS; | |
625 | ||
626 | eh = (struct ethhdr *)(skb->data + nhoff + sizeof(struct vxlanhdr)); | |
627 | type = eh->h_proto; | |
628 | ||
629 | rcu_read_lock(); | |
630 | ptype = gro_find_complete_by_type(type); | |
631 | if (ptype != NULL) | |
632 | err = ptype->callbacks.gro_complete(skb, nhoff + vxlan_len); | |
633 | ||
634 | rcu_read_unlock(); | |
635 | return err; | |
636 | } | |
637 | ||
53cf5275 | 638 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 639 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
640 | { |
641 | struct net_device *dev; | |
dc01e7d3 | 642 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
643 | struct net *net = sock_net(sk); |
644 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 645 | __be16 port = inet_sk(sk)->inet_sport; |
dc01e7d3 OG |
646 | int err; |
647 | ||
648 | if (sa_family == AF_INET) { | |
649 | err = udp_add_offload(&vs->udp_offloads); | |
650 | if (err) | |
651 | pr_warn("vxlan: udp_add_offload failed with status %d\n", err); | |
652 | } | |
53cf5275 JG |
653 | |
654 | rcu_read_lock(); | |
655 | for_each_netdev_rcu(net, dev) { | |
656 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
657 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
658 | port); | |
659 | } | |
660 | rcu_read_unlock(); | |
661 | } | |
662 | ||
663 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 664 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
665 | { |
666 | struct net_device *dev; | |
dc01e7d3 | 667 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
668 | struct net *net = sock_net(sk); |
669 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 670 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
671 | |
672 | rcu_read_lock(); | |
673 | for_each_netdev_rcu(net, dev) { | |
674 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
675 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
676 | port); | |
677 | } | |
678 | rcu_read_unlock(); | |
dc01e7d3 OG |
679 | |
680 | if (sa_family == AF_INET) | |
681 | udp_del_offload(&vs->udp_offloads); | |
53cf5275 JG |
682 | } |
683 | ||
d342894c | 684 | /* Add new entry to forwarding table -- assumes lock held */ |
685 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 686 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 687 | __u16 state, __u16 flags, |
73cf3317 | 688 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 689 | __u8 ndm_flags) |
d342894c | 690 | { |
9e4b93f9 | 691 | struct vxlan_rdst *rd = NULL; |
d342894c | 692 | struct vxlan_fdb *f; |
693 | int notify = 0; | |
694 | ||
014be2c8 | 695 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 696 | if (f) { |
697 | if (flags & NLM_F_EXCL) { | |
698 | netdev_dbg(vxlan->dev, | |
699 | "lost race to create %pM\n", mac); | |
700 | return -EEXIST; | |
701 | } | |
702 | if (f->state != state) { | |
703 | f->state = state; | |
704 | f->updated = jiffies; | |
705 | notify = 1; | |
706 | } | |
ae884082 DS |
707 | if (f->flags != ndm_flags) { |
708 | f->flags = ndm_flags; | |
709 | f->updated = jiffies; | |
710 | notify = 1; | |
711 | } | |
906dc186 TR |
712 | if ((flags & NLM_F_REPLACE)) { |
713 | /* Only change unicasts */ | |
714 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
715 | is_zero_ether_addr(f->eth_addr))) { | |
716 | int rc = vxlan_fdb_replace(f, ip, port, vni, | |
717 | ifindex); | |
718 | ||
719 | if (rc < 0) | |
720 | return rc; | |
721 | notify |= rc; | |
722 | } else | |
723 | return -EOPNOTSUPP; | |
724 | } | |
6681712d | 725 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
726 | (is_multicast_ether_addr(f->eth_addr) || |
727 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
728 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
729 | &rd); | |
6681712d DS |
730 | |
731 | if (rc < 0) | |
732 | return rc; | |
733 | notify |= rc; | |
734 | } | |
d342894c | 735 | } else { |
736 | if (!(flags & NLM_F_CREATE)) | |
737 | return -ENOENT; | |
738 | ||
739 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
740 | return -ENOSPC; | |
741 | ||
906dc186 TR |
742 | /* Disallow replace to add a multicast entry */ |
743 | if ((flags & NLM_F_REPLACE) && | |
744 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
745 | return -EOPNOTSUPP; | |
746 | ||
e4c7ed41 | 747 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 748 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
749 | if (!f) | |
750 | return -ENOMEM; | |
751 | ||
752 | notify = 1; | |
d342894c | 753 | f->state = state; |
ae884082 | 754 | f->flags = ndm_flags; |
d342894c | 755 | f->updated = f->used = jiffies; |
3e61aa8f | 756 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 757 | memcpy(f->eth_addr, mac, ETH_ALEN); |
758 | ||
9e4b93f9 | 759 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 760 | |
d342894c | 761 | ++vxlan->addrcnt; |
762 | hlist_add_head_rcu(&f->hlist, | |
763 | vxlan_fdb_head(vxlan, mac)); | |
764 | } | |
765 | ||
9e4b93f9 ND |
766 | if (notify) { |
767 | if (rd == NULL) | |
768 | rd = first_remote_rtnl(f); | |
769 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
770 | } | |
d342894c | 771 | |
772 | return 0; | |
773 | } | |
774 | ||
6706c82e | 775 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
776 | { |
777 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 778 | struct vxlan_rdst *rd, *nd; |
6681712d | 779 | |
3e61aa8f | 780 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 781 | kfree(rd); |
6681712d DS |
782 | kfree(f); |
783 | } | |
784 | ||
d342894c | 785 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
786 | { | |
787 | netdev_dbg(vxlan->dev, | |
788 | "delete %pM\n", f->eth_addr); | |
789 | ||
790 | --vxlan->addrcnt; | |
9e4b93f9 | 791 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 792 | |
793 | hlist_del_rcu(&f->hlist); | |
6681712d | 794 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 795 | } |
796 | ||
f0b074be | 797 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
e4c7ed41 | 798 | union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex) |
d342894c | 799 | { |
6681712d | 800 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 801 | int err; |
d342894c | 802 | |
f0b074be | 803 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
804 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
805 | if (err) | |
806 | return err; | |
f0b074be | 807 | } else { |
e4c7ed41 CW |
808 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
809 | if (remote->sa.sa_family == AF_INET) { | |
810 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
811 | ip->sa.sa_family = AF_INET; | |
812 | #if IS_ENABLED(CONFIG_IPV6) | |
813 | } else { | |
814 | ip->sin6.sin6_addr = in6addr_any; | |
815 | ip->sa.sa_family = AF_INET6; | |
816 | #endif | |
817 | } | |
f0b074be | 818 | } |
d342894c | 819 | |
6681712d | 820 | if (tb[NDA_PORT]) { |
73cf3317 | 821 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 822 | return -EINVAL; |
f0b074be MR |
823 | *port = nla_get_be16(tb[NDA_PORT]); |
824 | } else { | |
825 | *port = vxlan->dst_port; | |
826 | } | |
6681712d DS |
827 | |
828 | if (tb[NDA_VNI]) { | |
829 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
830 | return -EINVAL; | |
f0b074be MR |
831 | *vni = nla_get_u32(tb[NDA_VNI]); |
832 | } else { | |
833 | *vni = vxlan->default_dst.remote_vni; | |
834 | } | |
6681712d DS |
835 | |
836 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 837 | struct net_device *tdev; |
6681712d DS |
838 | |
839 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
840 | return -EINVAL; | |
f0b074be | 841 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 842 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 843 | if (!tdev) |
6681712d | 844 | return -EADDRNOTAVAIL; |
f0b074be MR |
845 | } else { |
846 | *ifindex = 0; | |
847 | } | |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | /* Add static entry (via netlink) */ | |
853 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
854 | struct net_device *dev, | |
855 | const unsigned char *addr, u16 flags) | |
856 | { | |
857 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
858 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 859 | union vxlan_addr ip; |
f0b074be MR |
860 | __be16 port; |
861 | u32 vni, ifindex; | |
862 | int err; | |
863 | ||
864 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
865 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
866 | ndm->ndm_state); | |
867 | return -EINVAL; | |
868 | } | |
869 | ||
870 | if (tb[NDA_DST] == NULL) | |
871 | return -EINVAL; | |
872 | ||
873 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
874 | if (err) | |
875 | return err; | |
6681712d | 876 | |
5933a7bb MR |
877 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
878 | return -EAFNOSUPPORT; | |
879 | ||
d342894c | 880 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 881 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 882 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 883 | spin_unlock_bh(&vxlan->hash_lock); |
884 | ||
885 | return err; | |
886 | } | |
887 | ||
888 | /* Delete entry (via netlink) */ | |
1690be63 VY |
889 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
890 | struct net_device *dev, | |
d342894c | 891 | const unsigned char *addr) |
892 | { | |
893 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
894 | struct vxlan_fdb *f; | |
bc7892ba | 895 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 896 | union vxlan_addr ip; |
bc7892ba MR |
897 | __be16 port; |
898 | u32 vni, ifindex; | |
899 | int err; | |
900 | ||
901 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
902 | if (err) | |
903 | return err; | |
904 | ||
905 | err = -ENOENT; | |
d342894c | 906 | |
907 | spin_lock_bh(&vxlan->hash_lock); | |
908 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
909 | if (!f) |
910 | goto out; | |
911 | ||
e4c7ed41 CW |
912 | if (!vxlan_addr_any(&ip)) { |
913 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
914 | if (!rd) |
915 | goto out; | |
916 | } | |
917 | ||
918 | err = 0; | |
919 | ||
920 | /* remove a destination if it's not the only one on the list, | |
921 | * otherwise destroy the fdb entry | |
922 | */ | |
923 | if (rd && !list_is_singular(&f->remotes)) { | |
924 | list_del_rcu(&rd->list); | |
9e4b93f9 | 925 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 926 | kfree_rcu(rd, rcu); |
bc7892ba | 927 | goto out; |
d342894c | 928 | } |
bc7892ba MR |
929 | |
930 | vxlan_fdb_destroy(vxlan, f); | |
931 | ||
932 | out: | |
d342894c | 933 | spin_unlock_bh(&vxlan->hash_lock); |
934 | ||
935 | return err; | |
936 | } | |
937 | ||
938 | /* Dump forwarding table */ | |
939 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
940 | struct net_device *dev, int idx) | |
941 | { | |
942 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
943 | unsigned int h; | |
944 | ||
945 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
946 | struct vxlan_fdb *f; | |
d342894c | 947 | int err; |
948 | ||
b67bfe0d | 949 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 950 | struct vxlan_rdst *rd; |
6681712d | 951 | |
3e61aa8f SH |
952 | if (idx < cb->args[0]) |
953 | goto skip; | |
954 | ||
955 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
956 | err = vxlan_fdb_info(skb, vxlan, f, |
957 | NETLINK_CB(cb->skb).portid, | |
958 | cb->nlh->nlmsg_seq, | |
959 | RTM_NEWNEIGH, | |
960 | NLM_F_MULTI, rd); | |
961 | if (err < 0) | |
3e61aa8f | 962 | goto out; |
6681712d | 963 | } |
3e61aa8f SH |
964 | skip: |
965 | ++idx; | |
d342894c | 966 | } |
967 | } | |
3e61aa8f | 968 | out: |
d342894c | 969 | return idx; |
970 | } | |
971 | ||
972 | /* Watch incoming packets to learn mapping between Ethernet address | |
973 | * and Tunnel endpoint. | |
26a41ae6 | 974 | * Return true if packet is bogus and should be droppped. |
d342894c | 975 | */ |
26a41ae6 | 976 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 977 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 978 | { |
979 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
980 | struct vxlan_fdb *f; | |
d342894c | 981 | |
982 | f = vxlan_find_mac(vxlan, src_mac); | |
983 | if (likely(f)) { | |
5ca5461c | 984 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 985 | |
e4c7ed41 | 986 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 987 | return false; |
988 | ||
989 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 990 | if (f->state & NUD_NOARP) |
26a41ae6 | 991 | return true; |
d342894c | 992 | |
993 | if (net_ratelimit()) | |
994 | netdev_info(dev, | |
e4c7ed41 | 995 | "%pM migrated from %pIS to %pIS\n", |
3e61aa8f | 996 | src_mac, &rdst->remote_ip, &src_ip); |
d342894c | 997 | |
e4c7ed41 | 998 | rdst->remote_ip = *src_ip; |
d342894c | 999 | f->updated = jiffies; |
9e4b93f9 | 1000 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 1001 | } else { |
1002 | /* learned new entry */ | |
1003 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 1004 | |
1005 | /* close off race between vxlan_flush and incoming packets */ | |
1006 | if (netif_running(dev)) | |
1007 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
1008 | NUD_REACHABLE, | |
1009 | NLM_F_EXCL|NLM_F_CREATE, | |
1010 | vxlan->dst_port, | |
1011 | vxlan->default_dst.remote_vni, | |
1012 | 0, NTF_SELF); | |
d342894c | 1013 | spin_unlock(&vxlan->hash_lock); |
1014 | } | |
26a41ae6 | 1015 | |
1016 | return false; | |
d342894c | 1017 | } |
1018 | ||
d342894c | 1019 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1020 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1021 | { |
553675fb | 1022 | struct vxlan_dev *vxlan; |
d342894c | 1023 | |
95ab0991 G |
1024 | /* The vxlan_sock is only used by dev, leaving group has |
1025 | * no effect on other vxlan devices. | |
1026 | */ | |
1027 | if (atomic_read(&dev->vn_sock->refcnt) == 1) | |
1028 | return false; | |
1029 | ||
553675fb | 1030 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1031 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1032 | continue; |
d342894c | 1033 | |
95ab0991 G |
1034 | if (vxlan->vn_sock != dev->vn_sock) |
1035 | continue; | |
1036 | ||
1037 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1038 | &dev->default_dst.remote_ip)) | |
1039 | continue; | |
1040 | ||
1041 | if (vxlan->default_dst.remote_ifindex != | |
1042 | dev->default_dst.remote_ifindex) | |
1043 | continue; | |
1044 | ||
1045 | return true; | |
553675fb | 1046 | } |
d342894c | 1047 | |
1048 | return false; | |
1049 | } | |
1050 | ||
7c47cedf | 1051 | static void vxlan_sock_hold(struct vxlan_sock *vs) |
d342894c | 1052 | { |
7c47cedf SH |
1053 | atomic_inc(&vs->refcnt); |
1054 | } | |
d342894c | 1055 | |
012a5729 | 1056 | void vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 1057 | { |
53cf5275 JG |
1058 | struct sock *sk = vs->sock->sk; |
1059 | struct net *net = sock_net(sk); | |
1060 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
012a5729 | 1061 | |
7c47cedf SH |
1062 | if (!atomic_dec_and_test(&vs->refcnt)) |
1063 | return; | |
d342894c | 1064 | |
1c51a915 | 1065 | spin_lock(&vn->sock_lock); |
7c47cedf | 1066 | hlist_del_rcu(&vs->hlist); |
559835ea | 1067 | rcu_assign_sk_user_data(vs->sock->sk, NULL); |
dc01e7d3 | 1068 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1069 | spin_unlock(&vn->sock_lock); |
1070 | ||
7c47cedf | 1071 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 1072 | } |
012a5729 | 1073 | EXPORT_SYMBOL_GPL(vxlan_sock_release); |
d342894c | 1074 | |
3fc2de2f | 1075 | /* Callback to update multicast group membership when first VNI on |
1076 | * multicast asddress is brought up | |
1077 | * Done as workqueue because ip_mc_join_group acquires RTNL. | |
7c47cedf | 1078 | */ |
3fc2de2f | 1079 | static void vxlan_igmp_join(struct work_struct *work) |
d342894c | 1080 | { |
3fc2de2f | 1081 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_join); |
7c47cedf SH |
1082 | struct vxlan_sock *vs = vxlan->vn_sock; |
1083 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1084 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1085 | int ifindex = vxlan->default_dst.remote_ifindex; | |
d342894c | 1086 | |
d342894c | 1087 | lock_sock(sk); |
e4c7ed41 CW |
1088 | if (ip->sa.sa_family == AF_INET) { |
1089 | struct ip_mreqn mreq = { | |
1090 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1091 | .imr_ifindex = ifindex, | |
1092 | }; | |
1093 | ||
1094 | ip_mc_join_group(sk, &mreq); | |
1095 | #if IS_ENABLED(CONFIG_IPV6) | |
1096 | } else { | |
1097 | ipv6_stub->ipv6_sock_mc_join(sk, ifindex, | |
1098 | &ip->sin6.sin6_addr); | |
1099 | #endif | |
1100 | } | |
3fc2de2f | 1101 | release_sock(sk); |
1102 | ||
012a5729 | 1103 | vxlan_sock_release(vs); |
3fc2de2f | 1104 | dev_put(vxlan->dev); |
1105 | } | |
1106 | ||
1107 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
1108 | static void vxlan_igmp_leave(struct work_struct *work) | |
1109 | { | |
1110 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_leave); | |
3fc2de2f | 1111 | struct vxlan_sock *vs = vxlan->vn_sock; |
1112 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1113 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1114 | int ifindex = vxlan->default_dst.remote_ifindex; | |
3fc2de2f | 1115 | |
1116 | lock_sock(sk); | |
e4c7ed41 CW |
1117 | if (ip->sa.sa_family == AF_INET) { |
1118 | struct ip_mreqn mreq = { | |
1119 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1120 | .imr_ifindex = ifindex, | |
1121 | }; | |
1122 | ||
1123 | ip_mc_leave_group(sk, &mreq); | |
1124 | #if IS_ENABLED(CONFIG_IPV6) | |
1125 | } else { | |
1126 | ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, | |
1127 | &ip->sin6.sin6_addr); | |
1128 | #endif | |
1129 | } | |
1130 | ||
d342894c | 1131 | release_sock(sk); |
d342894c | 1132 | |
012a5729 | 1133 | vxlan_sock_release(vs); |
7c47cedf | 1134 | dev_put(vxlan->dev); |
d342894c | 1135 | } |
1136 | ||
1137 | /* Callback from net/ipv4/udp.c to receive packets */ | |
1138 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
1139 | { | |
5cfccc5a | 1140 | struct vxlan_sock *vs; |
d342894c | 1141 | struct vxlanhdr *vxh; |
d342894c | 1142 | |
d342894c | 1143 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1144 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 1145 | goto error; |
1146 | ||
7ce04758 PS |
1147 | /* Return packets with reserved bits set */ |
1148 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
d342894c | 1149 | if (vxh->vx_flags != htonl(VXLAN_FLAGS) || |
1150 | (vxh->vx_vni & htonl(0xff))) { | |
1151 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1152 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
1153 | goto error; | |
1154 | } | |
1155 | ||
5cfccc5a PS |
1156 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
1157 | goto drop; | |
1158 | ||
559835ea | 1159 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1160 | if (!vs) |
d342894c | 1161 | goto drop; |
d342894c | 1162 | |
d0bc6555 OG |
1163 | /* If the NIC driver gave us an encapsulated packet |
1164 | * with the encapsulation mark, the device checksummed it | |
1165 | * for us. Otherwise force the upper layers to verify it. | |
1166 | */ | |
1167 | if ((skb->ip_summed != CHECKSUM_UNNECESSARY && skb->ip_summed != CHECKSUM_PARTIAL) || | |
1168 | !skb->encapsulation) | |
1169 | skb->ip_summed = CHECKSUM_NONE; | |
1170 | ||
1171 | skb->encapsulation = 0; | |
1172 | ||
5cfccc5a PS |
1173 | vs->rcv(vs, skb, vxh->vx_vni); |
1174 | return 0; | |
1175 | ||
1176 | drop: | |
1177 | /* Consume bad packet */ | |
1178 | kfree_skb(skb); | |
1179 | return 0; | |
1180 | ||
1181 | error: | |
1182 | /* Return non vxlan pkt */ | |
1183 | return 1; | |
1184 | } | |
1185 | ||
1186 | static void vxlan_rcv(struct vxlan_sock *vs, | |
1187 | struct sk_buff *skb, __be32 vx_vni) | |
1188 | { | |
e4c7ed41 CW |
1189 | struct iphdr *oip = NULL; |
1190 | struct ipv6hdr *oip6 = NULL; | |
5cfccc5a | 1191 | struct vxlan_dev *vxlan; |
8f84985f | 1192 | struct pcpu_sw_netstats *stats; |
e4c7ed41 | 1193 | union vxlan_addr saddr; |
5cfccc5a | 1194 | __u32 vni; |
e4c7ed41 CW |
1195 | int err = 0; |
1196 | union vxlan_addr *remote_ip; | |
5cfccc5a PS |
1197 | |
1198 | vni = ntohl(vx_vni) >> 8; | |
1199 | /* Is this VNI defined? */ | |
1200 | vxlan = vxlan_vs_find_vni(vs, vni); | |
1201 | if (!vxlan) | |
d342894c | 1202 | goto drop; |
d342894c | 1203 | |
e4c7ed41 | 1204 | remote_ip = &vxlan->default_dst.remote_ip; |
e4f67add | 1205 | skb_reset_mac_header(skb); |
d342894c | 1206 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
d342894c | 1207 | |
1208 | /* Ignore packet loops (and multicast echo) */ | |
7367d0b5 | 1209 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) |
d342894c | 1210 | goto drop; |
1211 | ||
7ce04758 | 1212 | /* Re-examine inner Ethernet packet */ |
e4c7ed41 CW |
1213 | if (remote_ip->sa.sa_family == AF_INET) { |
1214 | oip = ip_hdr(skb); | |
1215 | saddr.sin.sin_addr.s_addr = oip->saddr; | |
1216 | saddr.sa.sa_family = AF_INET; | |
1217 | #if IS_ENABLED(CONFIG_IPV6) | |
1218 | } else { | |
1219 | oip6 = ipv6_hdr(skb); | |
1220 | saddr.sin6.sin6_addr = oip6->saddr; | |
1221 | saddr.sa.sa_family = AF_INET6; | |
1222 | #endif | |
1223 | } | |
1224 | ||
26a41ae6 | 1225 | if ((vxlan->flags & VXLAN_F_LEARN) && |
e4c7ed41 | 1226 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) |
26a41ae6 | 1227 | goto drop; |
d342894c | 1228 | |
d342894c | 1229 | skb_reset_network_header(skb); |
0afb1666 | 1230 | |
e4c7ed41 CW |
1231 | if (oip6) |
1232 | err = IP6_ECN_decapsulate(oip6, skb); | |
1233 | if (oip) | |
1234 | err = IP_ECN_decapsulate(oip, skb); | |
1235 | ||
d342894c | 1236 | if (unlikely(err)) { |
e4c7ed41 CW |
1237 | if (log_ecn_error) { |
1238 | if (oip6) | |
1239 | net_info_ratelimited("non-ECT from %pI6\n", | |
1240 | &oip6->saddr); | |
1241 | if (oip) | |
1242 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1243 | &oip->saddr, oip->tos); | |
1244 | } | |
d342894c | 1245 | if (err > 1) { |
1246 | ++vxlan->dev->stats.rx_frame_errors; | |
1247 | ++vxlan->dev->stats.rx_errors; | |
1248 | goto drop; | |
1249 | } | |
1250 | } | |
1251 | ||
e8171045 | 1252 | stats = this_cpu_ptr(vxlan->dev->tstats); |
d342894c | 1253 | u64_stats_update_begin(&stats->syncp); |
1254 | stats->rx_packets++; | |
1255 | stats->rx_bytes += skb->len; | |
1256 | u64_stats_update_end(&stats->syncp); | |
1257 | ||
1258 | netif_rx(skb); | |
1259 | ||
5cfccc5a | 1260 | return; |
d342894c | 1261 | drop: |
1262 | /* Consume bad packet */ | |
1263 | kfree_skb(skb); | |
d342894c | 1264 | } |
1265 | ||
e4f67add DS |
1266 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1267 | { | |
1268 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1269 | struct arphdr *parp; | |
1270 | u8 *arpptr, *sha; | |
1271 | __be32 sip, tip; | |
1272 | struct neighbour *n; | |
1273 | ||
1274 | if (dev->flags & IFF_NOARP) | |
1275 | goto out; | |
1276 | ||
1277 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1278 | dev->stats.tx_dropped++; | |
1279 | goto out; | |
1280 | } | |
1281 | parp = arp_hdr(skb); | |
1282 | ||
1283 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1284 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1285 | parp->ar_pro != htons(ETH_P_IP) || | |
1286 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1287 | parp->ar_hln != dev->addr_len || | |
1288 | parp->ar_pln != 4) | |
1289 | goto out; | |
1290 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1291 | sha = arpptr; | |
1292 | arpptr += dev->addr_len; /* sha */ | |
1293 | memcpy(&sip, arpptr, sizeof(sip)); | |
1294 | arpptr += sizeof(sip); | |
1295 | arpptr += dev->addr_len; /* tha */ | |
1296 | memcpy(&tip, arpptr, sizeof(tip)); | |
1297 | ||
1298 | if (ipv4_is_loopback(tip) || | |
1299 | ipv4_is_multicast(tip)) | |
1300 | goto out; | |
1301 | ||
1302 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1303 | ||
1304 | if (n) { | |
e4f67add DS |
1305 | struct vxlan_fdb *f; |
1306 | struct sk_buff *reply; | |
1307 | ||
1308 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1309 | neigh_release(n); | |
1310 | goto out; | |
1311 | } | |
1312 | ||
1313 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1314 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1315 | /* bridge-local neighbor */ |
1316 | neigh_release(n); | |
1317 | goto out; | |
1318 | } | |
1319 | ||
1320 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1321 | n->ha, sha); | |
1322 | ||
1323 | neigh_release(n); | |
1324 | ||
7346135d DS |
1325 | if (reply == NULL) |
1326 | goto out; | |
1327 | ||
e4f67add DS |
1328 | skb_reset_mac_header(reply); |
1329 | __skb_pull(reply, skb_network_offset(reply)); | |
1330 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1331 | reply->pkt_type = PACKET_HOST; | |
1332 | ||
1333 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1334 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1335 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1336 | union vxlan_addr ipa = { | |
1337 | .sin.sin_addr.s_addr = tip, | |
1338 | .sa.sa_family = AF_INET, | |
1339 | }; | |
1340 | ||
1341 | vxlan_ip_miss(dev, &ipa); | |
1342 | } | |
e4f67add DS |
1343 | out: |
1344 | consume_skb(skb); | |
1345 | return NETDEV_TX_OK; | |
1346 | } | |
1347 | ||
f564f45c | 1348 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1349 | |
1350 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, | |
1351 | struct neighbour *n, bool isrouter) | |
1352 | { | |
1353 | struct net_device *dev = request->dev; | |
1354 | struct sk_buff *reply; | |
1355 | struct nd_msg *ns, *na; | |
1356 | struct ipv6hdr *pip6; | |
1357 | u8 *daddr; | |
1358 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1359 | int ns_olen; | |
1360 | int i, len; | |
1361 | ||
1362 | if (dev == NULL) | |
1363 | return NULL; | |
1364 | ||
1365 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1366 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1367 | reply = alloc_skb(len, GFP_ATOMIC); | |
1368 | if (reply == NULL) | |
1369 | return NULL; | |
1370 | ||
1371 | reply->protocol = htons(ETH_P_IPV6); | |
1372 | reply->dev = dev; | |
1373 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1374 | skb_push(reply, sizeof(struct ethhdr)); | |
1375 | skb_set_mac_header(reply, 0); | |
1376 | ||
1377 | ns = (struct nd_msg *)skb_transport_header(request); | |
1378 | ||
1379 | daddr = eth_hdr(request)->h_source; | |
1380 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1381 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1382 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1383 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1384 | break; | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | /* Ethernet header */ | |
1389 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1390 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1391 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1392 | reply->protocol = htons(ETH_P_IPV6); | |
1393 | ||
1394 | skb_pull(reply, sizeof(struct ethhdr)); | |
1395 | skb_set_network_header(reply, 0); | |
1396 | skb_put(reply, sizeof(struct ipv6hdr)); | |
1397 | ||
1398 | /* IPv6 header */ | |
1399 | ||
1400 | pip6 = ipv6_hdr(reply); | |
1401 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1402 | pip6->version = 6; | |
1403 | pip6->priority = ipv6_hdr(request)->priority; | |
1404 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1405 | pip6->hop_limit = 255; | |
1406 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1407 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1408 | ||
1409 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
1410 | skb_set_transport_header(reply, 0); | |
1411 | ||
1412 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1413 | ||
1414 | /* Neighbor Advertisement */ | |
1415 | memset(na, 0, sizeof(*na)+na_olen); | |
1416 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1417 | na->icmph.icmp6_router = isrouter; | |
1418 | na->icmph.icmp6_override = 1; | |
1419 | na->icmph.icmp6_solicited = 1; | |
1420 | na->target = ns->target; | |
1421 | ether_addr_copy(&na->opt[2], n->ha); | |
1422 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1423 | na->opt[1] = na_olen >> 3; | |
1424 | ||
1425 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1426 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1427 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1428 | ||
1429 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1430 | ||
1431 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1432 | ||
1433 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1434 | ||
1435 | return reply; | |
1436 | } | |
1437 | ||
f564f45c CW |
1438 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1439 | { | |
1440 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1441 | struct nd_msg *msg; |
f564f45c CW |
1442 | const struct ipv6hdr *iphdr; |
1443 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1444 | struct neighbour *n; |
1445 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1446 | |
1447 | in6_dev = __in6_dev_get(dev); | |
1448 | if (!in6_dev) | |
1449 | goto out; | |
1450 | ||
1451 | if (!pskb_may_pull(skb, skb->len)) | |
1452 | goto out; | |
1453 | ||
1454 | iphdr = ipv6_hdr(skb); | |
1455 | saddr = &iphdr->saddr; | |
1456 | daddr = &iphdr->daddr; | |
1457 | ||
f564f45c CW |
1458 | msg = (struct nd_msg *)skb_transport_header(skb); |
1459 | if (msg->icmph.icmp6_code != 0 || | |
1460 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1461 | goto out; | |
1462 | ||
4b29dba9 DS |
1463 | if (ipv6_addr_loopback(daddr) || |
1464 | ipv6_addr_is_multicast(&msg->target)) | |
1465 | goto out; | |
1466 | ||
1467 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1468 | |
1469 | if (n) { | |
1470 | struct vxlan_fdb *f; | |
4b29dba9 | 1471 | struct sk_buff *reply; |
f564f45c CW |
1472 | |
1473 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1474 | neigh_release(n); | |
1475 | goto out; | |
1476 | } | |
1477 | ||
1478 | f = vxlan_find_mac(vxlan, n->ha); | |
1479 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1480 | /* bridge-local neighbor */ | |
1481 | neigh_release(n); | |
1482 | goto out; | |
1483 | } | |
1484 | ||
4b29dba9 DS |
1485 | reply = vxlan_na_create(skb, n, |
1486 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1487 | ||
f564f45c | 1488 | neigh_release(n); |
4b29dba9 DS |
1489 | |
1490 | if (reply == NULL) | |
1491 | goto out; | |
1492 | ||
1493 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1494 | dev->stats.rx_dropped++; | |
1495 | ||
f564f45c | 1496 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1497 | union vxlan_addr ipa = { |
1498 | .sin6.sin6_addr = msg->target, | |
1499 | .sa.sa_family = AF_INET6, | |
1500 | }; | |
1501 | ||
f564f45c CW |
1502 | vxlan_ip_miss(dev, &ipa); |
1503 | } | |
1504 | ||
1505 | out: | |
1506 | consume_skb(skb); | |
1507 | return NETDEV_TX_OK; | |
1508 | } | |
1509 | #endif | |
1510 | ||
e4f67add DS |
1511 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1512 | { | |
1513 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1514 | struct neighbour *n; | |
e4f67add DS |
1515 | |
1516 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1517 | return false; | |
1518 | ||
1519 | n = NULL; | |
1520 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1521 | case ETH_P_IP: | |
e15a00aa CW |
1522 | { |
1523 | struct iphdr *pip; | |
1524 | ||
e4f67add DS |
1525 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1526 | return false; | |
1527 | pip = ip_hdr(skb); | |
1528 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1529 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1530 | union vxlan_addr ipa = { | |
1531 | .sin.sin_addr.s_addr = pip->daddr, | |
1532 | .sa.sa_family = AF_INET, | |
1533 | }; | |
1534 | ||
1535 | vxlan_ip_miss(dev, &ipa); | |
1536 | return false; | |
1537 | } | |
1538 | ||
e4f67add | 1539 | break; |
e15a00aa CW |
1540 | } |
1541 | #if IS_ENABLED(CONFIG_IPV6) | |
1542 | case ETH_P_IPV6: | |
1543 | { | |
1544 | struct ipv6hdr *pip6; | |
1545 | ||
1546 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1547 | return false; | |
1548 | pip6 = ipv6_hdr(skb); | |
1549 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1550 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1551 | union vxlan_addr ipa = { | |
1552 | .sin6.sin6_addr = pip6->daddr, | |
1553 | .sa.sa_family = AF_INET6, | |
1554 | }; | |
1555 | ||
1556 | vxlan_ip_miss(dev, &ipa); | |
1557 | return false; | |
1558 | } | |
1559 | ||
1560 | break; | |
1561 | } | |
1562 | #endif | |
e4f67add DS |
1563 | default: |
1564 | return false; | |
1565 | } | |
1566 | ||
1567 | if (n) { | |
1568 | bool diff; | |
1569 | ||
7367d0b5 | 1570 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1571 | if (diff) { |
1572 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1573 | dev->addr_len); | |
1574 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1575 | } | |
1576 | neigh_release(n); | |
1577 | return diff; | |
e4c7ed41 CW |
1578 | } |
1579 | ||
e4f67add DS |
1580 | return false; |
1581 | } | |
1582 | ||
05f47d69 | 1583 | /* Compute source port for outgoing packet |
1584 | * first choice to use L4 flow hash since it will spread | |
1585 | * better and maybe available from hardware | |
1586 | * secondary choice is to use jhash on the Ethernet header | |
1587 | */ | |
49560532 | 1588 | __be16 vxlan_src_port(__u16 port_min, __u16 port_max, struct sk_buff *skb) |
05f47d69 | 1589 | { |
49560532 | 1590 | unsigned int range = (port_max - port_min) + 1; |
05f47d69 | 1591 | u32 hash; |
1592 | ||
3958afa1 | 1593 | hash = skb_get_hash(skb); |
05f47d69 | 1594 | if (!hash) |
1595 | hash = jhash(skb->data, 2 * ETH_ALEN, | |
1596 | (__force u32) skb->protocol); | |
1597 | ||
49560532 | 1598 | return htons((((u64) hash * range) >> 32) + port_min); |
05f47d69 | 1599 | } |
49560532 | 1600 | EXPORT_SYMBOL_GPL(vxlan_src_port); |
05f47d69 | 1601 | |
05c0db08 PS |
1602 | static int handle_offloads(struct sk_buff *skb) |
1603 | { | |
1604 | if (skb_is_gso(skb)) { | |
1605 | int err = skb_unclone(skb, GFP_ATOMIC); | |
1606 | if (unlikely(err)) | |
1607 | return err; | |
1608 | ||
f6ace502 | 1609 | skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL; |
05c0db08 PS |
1610 | } else if (skb->ip_summed != CHECKSUM_PARTIAL) |
1611 | skb->ip_summed = CHECKSUM_NONE; | |
1612 | ||
1613 | return 0; | |
1614 | } | |
1615 | ||
e4c7ed41 | 1616 | #if IS_ENABLED(CONFIG_IPV6) |
11796187 | 1617 | static int vxlan6_xmit_skb(struct vxlan_sock *vs, |
e4c7ed41 CW |
1618 | struct dst_entry *dst, struct sk_buff *skb, |
1619 | struct net_device *dev, struct in6_addr *saddr, | |
1620 | struct in6_addr *daddr, __u8 prio, __u8 ttl, | |
1621 | __be16 src_port, __be16 dst_port, __be32 vni) | |
1622 | { | |
1623 | struct ipv6hdr *ip6h; | |
1624 | struct vxlanhdr *vxh; | |
1625 | struct udphdr *uh; | |
1626 | int min_headroom; | |
1627 | int err; | |
1628 | ||
1629 | if (!skb->encapsulation) { | |
1630 | skb_reset_inner_headers(skb); | |
1631 | skb->encapsulation = 1; | |
1632 | } | |
1633 | ||
963a88b3 ND |
1634 | skb_scrub_packet(skb, false); |
1635 | ||
e4c7ed41 CW |
1636 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
1637 | + VXLAN_HLEN + sizeof(struct ipv6hdr) | |
1638 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
1639 | ||
1640 | /* Need space for new headers (invalidates iph ptr) */ | |
1641 | err = skb_cow_head(skb, min_headroom); | |
1642 | if (unlikely(err)) | |
1643 | return err; | |
1644 | ||
1645 | if (vlan_tx_tag_present(skb)) { | |
1646 | if (WARN_ON(!__vlan_put_tag(skb, | |
1647 | skb->vlan_proto, | |
1648 | vlan_tx_tag_get(skb)))) | |
1649 | return -ENOMEM; | |
1650 | ||
1651 | skb->vlan_tci = 0; | |
1652 | } | |
1653 | ||
1654 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); | |
1655 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1656 | vxh->vx_vni = vni; | |
1657 | ||
1658 | __skb_push(skb, sizeof(*uh)); | |
1659 | skb_reset_transport_header(skb); | |
1660 | uh = udp_hdr(skb); | |
1661 | ||
1662 | uh->dest = dst_port; | |
1663 | uh->source = src_port; | |
1664 | ||
1665 | uh->len = htons(skb->len); | |
1666 | uh->check = 0; | |
1667 | ||
1668 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); | |
1669 | IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | | |
1670 | IPSKB_REROUTED); | |
e4c7ed41 CW |
1671 | skb_dst_set(skb, dst); |
1672 | ||
1673 | if (!skb_is_gso(skb) && !(dst->dev->features & NETIF_F_IPV6_CSUM)) { | |
1674 | __wsum csum = skb_checksum(skb, 0, skb->len, 0); | |
1675 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1676 | uh->check = csum_ipv6_magic(saddr, daddr, skb->len, | |
1677 | IPPROTO_UDP, csum); | |
1678 | if (uh->check == 0) | |
1679 | uh->check = CSUM_MANGLED_0; | |
1680 | } else { | |
1681 | skb->ip_summed = CHECKSUM_PARTIAL; | |
1682 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
1683 | skb->csum_offset = offsetof(struct udphdr, check); | |
1684 | uh->check = ~csum_ipv6_magic(saddr, daddr, | |
1685 | skb->len, IPPROTO_UDP, 0); | |
1686 | } | |
1687 | ||
1688 | __skb_push(skb, sizeof(*ip6h)); | |
1689 | skb_reset_network_header(skb); | |
1690 | ip6h = ipv6_hdr(skb); | |
1691 | ip6h->version = 6; | |
1692 | ip6h->priority = prio; | |
1693 | ip6h->flow_lbl[0] = 0; | |
1694 | ip6h->flow_lbl[1] = 0; | |
1695 | ip6h->flow_lbl[2] = 0; | |
1696 | ip6h->payload_len = htons(skb->len); | |
1697 | ip6h->nexthdr = IPPROTO_UDP; | |
1698 | ip6h->hop_limit = ttl; | |
1699 | ip6h->daddr = *daddr; | |
1700 | ip6h->saddr = *saddr; | |
1701 | ||
e4c7ed41 CW |
1702 | err = handle_offloads(skb); |
1703 | if (err) | |
1704 | return err; | |
1705 | ||
1706 | ip6tunnel_xmit(skb, dev); | |
1707 | return 0; | |
1708 | } | |
1709 | #endif | |
1710 | ||
11796187 | 1711 | int vxlan_xmit_skb(struct vxlan_sock *vs, |
49560532 PS |
1712 | struct rtable *rt, struct sk_buff *skb, |
1713 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, | |
1714 | __be16 src_port, __be16 dst_port, __be32 vni) | |
1715 | { | |
1716 | struct vxlanhdr *vxh; | |
1717 | struct udphdr *uh; | |
649c5b8b | 1718 | int min_headroom; |
49560532 PS |
1719 | int err; |
1720 | ||
1721 | if (!skb->encapsulation) { | |
1722 | skb_reset_inner_headers(skb); | |
1723 | skb->encapsulation = 1; | |
1724 | } | |
1725 | ||
649c5b8b | 1726 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 PS |
1727 | + VXLAN_HLEN + sizeof(struct iphdr) |
1728 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
649c5b8b PS |
1729 | |
1730 | /* Need space for new headers (invalidates iph ptr) */ | |
1731 | err = skb_cow_head(skb, min_headroom); | |
1732 | if (unlikely(err)) | |
1733 | return err; | |
1734 | ||
1eaa8178 PS |
1735 | if (vlan_tx_tag_present(skb)) { |
1736 | if (WARN_ON(!__vlan_put_tag(skb, | |
1737 | skb->vlan_proto, | |
1738 | vlan_tx_tag_get(skb)))) | |
1739 | return -ENOMEM; | |
1740 | ||
1741 | skb->vlan_tci = 0; | |
1742 | } | |
1743 | ||
49560532 PS |
1744 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
1745 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1746 | vxh->vx_vni = vni; | |
1747 | ||
1748 | __skb_push(skb, sizeof(*uh)); | |
1749 | skb_reset_transport_header(skb); | |
1750 | uh = udp_hdr(skb); | |
1751 | ||
1752 | uh->dest = dst_port; | |
1753 | uh->source = src_port; | |
1754 | ||
1755 | uh->len = htons(skb->len); | |
1756 | uh->check = 0; | |
1757 | ||
49560532 PS |
1758 | err = handle_offloads(skb); |
1759 | if (err) | |
1760 | return err; | |
1761 | ||
aad88724 ED |
1762 | return iptunnel_xmit(vs->sock->sk, rt, skb, src, dst, IPPROTO_UDP, |
1763 | tos, ttl, df, false); | |
49560532 PS |
1764 | } |
1765 | EXPORT_SYMBOL_GPL(vxlan_xmit_skb); | |
1766 | ||
9dcc71e1 SS |
1767 | /* Bypass encapsulation if the destination is local */ |
1768 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1769 | struct vxlan_dev *dst_vxlan) | |
1770 | { | |
8f84985f | 1771 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1772 | union vxlan_addr loopback; |
1773 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
9dcc71e1 | 1774 | |
8f84985f LR |
1775 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1776 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1777 | skb->pkt_type = PACKET_HOST; |
1778 | skb->encapsulation = 0; | |
1779 | skb->dev = dst_vxlan->dev; | |
1780 | __skb_pull(skb, skb_network_offset(skb)); | |
1781 | ||
e4c7ed41 CW |
1782 | if (remote_ip->sa.sa_family == AF_INET) { |
1783 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1784 | loopback.sa.sa_family = AF_INET; | |
1785 | #if IS_ENABLED(CONFIG_IPV6) | |
1786 | } else { | |
1787 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1788 | loopback.sa.sa_family = AF_INET6; | |
1789 | #endif | |
1790 | } | |
1791 | ||
9dcc71e1 | 1792 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1793 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1794 | |
1795 | u64_stats_update_begin(&tx_stats->syncp); | |
1796 | tx_stats->tx_packets++; | |
1797 | tx_stats->tx_bytes += skb->len; | |
1798 | u64_stats_update_end(&tx_stats->syncp); | |
1799 | ||
1800 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1801 | u64_stats_update_begin(&rx_stats->syncp); | |
1802 | rx_stats->rx_packets++; | |
1803 | rx_stats->rx_bytes += skb->len; | |
1804 | u64_stats_update_end(&rx_stats->syncp); | |
1805 | } else { | |
1806 | skb->dev->stats.rx_dropped++; | |
1807 | } | |
1808 | } | |
1809 | ||
4ad16930 SH |
1810 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1811 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1812 | { |
1813 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
e4c7ed41 | 1814 | struct rtable *rt = NULL; |
d342894c | 1815 | const struct iphdr *old_iph; |
d342894c | 1816 | struct flowi4 fl4; |
e4c7ed41 CW |
1817 | union vxlan_addr *dst; |
1818 | __be16 src_port = 0, dst_port; | |
234f5b73 | 1819 | u32 vni; |
d342894c | 1820 | __be16 df = 0; |
1821 | __u8 tos, ttl; | |
0e6fbc5b | 1822 | int err; |
d342894c | 1823 | |
823aa873 | 1824 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; |
6681712d | 1825 | vni = rdst->remote_vni; |
e4c7ed41 | 1826 | dst = &rdst->remote_ip; |
e4f67add | 1827 | |
e4c7ed41 | 1828 | if (vxlan_addr_any(dst)) { |
e4f67add | 1829 | if (did_rsc) { |
e4f67add | 1830 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1831 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1832 | return; |
e4f67add | 1833 | } |
ef59febe | 1834 | goto drop; |
e4f67add | 1835 | } |
ef59febe | 1836 | |
d342894c | 1837 | old_iph = ip_hdr(skb); |
1838 | ||
d342894c | 1839 | ttl = vxlan->ttl; |
e4c7ed41 | 1840 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1841 | ttl = 1; |
1842 | ||
1843 | tos = vxlan->tos; | |
1844 | if (tos == 1) | |
206aaafc | 1845 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1846 | |
49560532 | 1847 | src_port = vxlan_src_port(vxlan->port_min, vxlan->port_max, skb); |
d342894c | 1848 | |
e4c7ed41 CW |
1849 | if (dst->sa.sa_family == AF_INET) { |
1850 | memset(&fl4, 0, sizeof(fl4)); | |
1851 | fl4.flowi4_oif = rdst->remote_ifindex; | |
1852 | fl4.flowi4_tos = RT_TOS(tos); | |
1853 | fl4.daddr = dst->sin.sin_addr.s_addr; | |
1854 | fl4.saddr = vxlan->saddr.sin.sin_addr.s_addr; | |
1855 | ||
1856 | rt = ip_route_output_key(dev_net(dev), &fl4); | |
1857 | if (IS_ERR(rt)) { | |
1858 | netdev_dbg(dev, "no route to %pI4\n", | |
1859 | &dst->sin.sin_addr.s_addr); | |
1860 | dev->stats.tx_carrier_errors++; | |
1861 | goto tx_error; | |
1862 | } | |
d342894c | 1863 | |
e4c7ed41 CW |
1864 | if (rt->dst.dev == dev) { |
1865 | netdev_dbg(dev, "circular route to %pI4\n", | |
1866 | &dst->sin.sin_addr.s_addr); | |
1867 | dev->stats.collisions++; | |
fffc15a5 | 1868 | goto rt_tx_error; |
e4c7ed41 CW |
1869 | } |
1870 | ||
1871 | /* Bypass encapsulation if the destination is local */ | |
1872 | if (rt->rt_flags & RTCF_LOCAL && | |
1873 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1874 | struct vxlan_dev *dst_vxlan; | |
1875 | ||
1876 | ip_rt_put(rt); | |
1877 | dst_vxlan = vxlan_find_vni(dev_net(dev), vni, dst_port); | |
1878 | if (!dst_vxlan) | |
1879 | goto tx_error; | |
1880 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1881 | return; | |
1882 | } | |
1883 | ||
1884 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); | |
1885 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
d342894c | 1886 | |
11796187 | 1887 | err = vxlan_xmit_skb(vxlan->vn_sock, rt, skb, |
e4c7ed41 CW |
1888 | fl4.saddr, dst->sin.sin_addr.s_addr, |
1889 | tos, ttl, df, src_port, dst_port, | |
1890 | htonl(vni << 8)); | |
9dcc71e1 | 1891 | |
e4c7ed41 CW |
1892 | if (err < 0) |
1893 | goto rt_tx_error; | |
1894 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
1895 | #if IS_ENABLED(CONFIG_IPV6) | |
1896 | } else { | |
1897 | struct sock *sk = vxlan->vn_sock->sock->sk; | |
1898 | struct dst_entry *ndst; | |
1899 | struct flowi6 fl6; | |
1900 | u32 flags; | |
1901 | ||
1902 | memset(&fl6, 0, sizeof(fl6)); | |
1903 | fl6.flowi6_oif = rdst->remote_ifindex; | |
1904 | fl6.daddr = dst->sin6.sin6_addr; | |
1905 | fl6.saddr = vxlan->saddr.sin6.sin6_addr; | |
8c1bb79f | 1906 | fl6.flowi6_proto = IPPROTO_UDP; |
e4c7ed41 CW |
1907 | |
1908 | if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) { | |
1909 | netdev_dbg(dev, "no route to %pI6\n", | |
1910 | &dst->sin6.sin6_addr); | |
1911 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 1912 | goto tx_error; |
e4c7ed41 | 1913 | } |
d342894c | 1914 | |
e4c7ed41 CW |
1915 | if (ndst->dev == dev) { |
1916 | netdev_dbg(dev, "circular route to %pI6\n", | |
1917 | &dst->sin6.sin6_addr); | |
1918 | dst_release(ndst); | |
1919 | dev->stats.collisions++; | |
1920 | goto tx_error; | |
1921 | } | |
0e6fbc5b | 1922 | |
e4c7ed41 CW |
1923 | /* Bypass encapsulation if the destination is local */ |
1924 | flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
1925 | if (flags & RTF_LOCAL && | |
1926 | !(flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1927 | struct vxlan_dev *dst_vxlan; | |
1928 | ||
1929 | dst_release(ndst); | |
1930 | dst_vxlan = vxlan_find_vni(dev_net(dev), vni, dst_port); | |
1931 | if (!dst_vxlan) | |
1932 | goto tx_error; | |
1933 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1934 | return; | |
1935 | } | |
49560532 | 1936 | |
e4c7ed41 CW |
1937 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
1938 | ||
11796187 | 1939 | err = vxlan6_xmit_skb(vxlan->vn_sock, ndst, skb, |
e4c7ed41 CW |
1940 | dev, &fl6.saddr, &fl6.daddr, 0, ttl, |
1941 | src_port, dst_port, htonl(vni << 8)); | |
1942 | #endif | |
1943 | } | |
0e6fbc5b | 1944 | |
4ad16930 | 1945 | return; |
d342894c | 1946 | |
1947 | drop: | |
1948 | dev->stats.tx_dropped++; | |
1949 | goto tx_free; | |
1950 | ||
49560532 PS |
1951 | rt_tx_error: |
1952 | ip_rt_put(rt); | |
d342894c | 1953 | tx_error: |
1954 | dev->stats.tx_errors++; | |
1955 | tx_free: | |
1956 | dev_kfree_skb(skb); | |
d342894c | 1957 | } |
1958 | ||
6681712d DS |
1959 | /* Transmit local packets over Vxlan |
1960 | * | |
1961 | * Outer IP header inherits ECN and DF from inner header. | |
1962 | * Outer UDP destination is the VXLAN assigned port. | |
1963 | * source port is based on hash of flow | |
1964 | */ | |
1965 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
1966 | { | |
1967 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1968 | struct ethhdr *eth; | |
1969 | bool did_rsc = false; | |
8f646c92 | 1970 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 1971 | struct vxlan_fdb *f; |
6681712d DS |
1972 | |
1973 | skb_reset_mac_header(skb); | |
1974 | eth = eth_hdr(skb); | |
1975 | ||
f564f45c CW |
1976 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
1977 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
1978 | return arp_reduce(dev, skb); | |
1979 | #if IS_ENABLED(CONFIG_IPV6) | |
1980 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
1981 | skb->len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) && | |
1982 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { | |
1983 | struct nd_msg *msg; | |
1984 | ||
1985 | msg = (struct nd_msg *)skb_transport_header(skb); | |
1986 | if (msg->icmph.icmp6_code == 0 && | |
1987 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
1988 | return neigh_reduce(dev, skb); | |
1989 | } | |
1990 | #endif | |
1991 | } | |
6681712d DS |
1992 | |
1993 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
ae884082 DS |
1994 | did_rsc = false; |
1995 | ||
1996 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
1997 | (ntohs(eth->h_proto) == ETH_P_IP || |
1998 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
1999 | did_rsc = route_shortcircuit(dev, skb); |
2000 | if (did_rsc) | |
2001 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
2002 | } | |
2003 | ||
6681712d | 2004 | if (f == NULL) { |
afbd8bae MR |
2005 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
2006 | if (f == NULL) { | |
2007 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
2008 | !is_multicast_ether_addr(eth->h_dest)) | |
2009 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2010 | ||
2011 | dev->stats.tx_dropped++; | |
8f646c92 | 2012 | kfree_skb(skb); |
afbd8bae MR |
2013 | return NETDEV_TX_OK; |
2014 | } | |
2015 | } | |
6681712d | 2016 | |
afbd8bae MR |
2017 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2018 | struct sk_buff *skb1; | |
6681712d | 2019 | |
8f646c92 ED |
2020 | if (!fdst) { |
2021 | fdst = rdst; | |
2022 | continue; | |
2023 | } | |
afbd8bae MR |
2024 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2025 | if (skb1) | |
2026 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
2027 | } |
2028 | ||
8f646c92 ED |
2029 | if (fdst) |
2030 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
2031 | else | |
2032 | kfree_skb(skb); | |
4ad16930 | 2033 | return NETDEV_TX_OK; |
6681712d DS |
2034 | } |
2035 | ||
d342894c | 2036 | /* Walk the forwarding table and purge stale entries */ |
2037 | static void vxlan_cleanup(unsigned long arg) | |
2038 | { | |
2039 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2040 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2041 | unsigned int h; | |
2042 | ||
2043 | if (!netif_running(vxlan->dev)) | |
2044 | return; | |
2045 | ||
2046 | spin_lock_bh(&vxlan->hash_lock); | |
2047 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2048 | struct hlist_node *p, *n; | |
2049 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2050 | struct vxlan_fdb *f | |
2051 | = container_of(p, struct vxlan_fdb, hlist); | |
2052 | unsigned long timeout; | |
2053 | ||
3c172868 | 2054 | if (f->state & NUD_PERMANENT) |
d342894c | 2055 | continue; |
2056 | ||
2057 | timeout = f->used + vxlan->age_interval * HZ; | |
2058 | if (time_before_eq(timeout, jiffies)) { | |
2059 | netdev_dbg(vxlan->dev, | |
2060 | "garbage collect %pM\n", | |
2061 | f->eth_addr); | |
2062 | f->state = NUD_STALE; | |
2063 | vxlan_fdb_destroy(vxlan, f); | |
2064 | } else if (time_before(timeout, next_timer)) | |
2065 | next_timer = timeout; | |
2066 | } | |
2067 | } | |
2068 | spin_unlock_bh(&vxlan->hash_lock); | |
2069 | ||
2070 | mod_timer(&vxlan->age_timer, next_timer); | |
2071 | } | |
2072 | ||
9c2e24e1 PS |
2073 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2074 | { | |
2075 | __u32 vni = vxlan->default_dst.remote_vni; | |
2076 | ||
2077 | vxlan->vn_sock = vs; | |
2078 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); | |
2079 | } | |
2080 | ||
d342894c | 2081 | /* Setup stats when device is created */ |
2082 | static int vxlan_init(struct net_device *dev) | |
2083 | { | |
1c51a915 SH |
2084 | struct vxlan_dev *vxlan = netdev_priv(dev); |
2085 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); | |
2086 | struct vxlan_sock *vs; | |
1c51a915 | 2087 | |
1c213bd2 | 2088 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2089 | if (!dev->tstats) |
d342894c | 2090 | return -ENOMEM; |
2091 | ||
1c51a915 | 2092 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 2093 | vs = vxlan_find_sock(dev_net(dev), vxlan->dst_port); |
1c51a915 SH |
2094 | if (vs) { |
2095 | /* If we have a socket with same port already, reuse it */ | |
2096 | atomic_inc(&vs->refcnt); | |
9c2e24e1 | 2097 | vxlan_vs_add_dev(vs, vxlan); |
1c51a915 SH |
2098 | } else { |
2099 | /* otherwise make new socket outside of RTNL */ | |
2100 | dev_hold(dev); | |
2101 | queue_work(vxlan_wq, &vxlan->sock_work); | |
2102 | } | |
2103 | spin_unlock(&vn->sock_lock); | |
2104 | ||
d342894c | 2105 | return 0; |
2106 | } | |
2107 | ||
ba609e9b | 2108 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2109 | { |
2110 | struct vxlan_fdb *f; | |
2111 | ||
2112 | spin_lock_bh(&vxlan->hash_lock); | |
2113 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2114 | if (f) | |
2115 | vxlan_fdb_destroy(vxlan, f); | |
2116 | spin_unlock_bh(&vxlan->hash_lock); | |
2117 | } | |
2118 | ||
ebf4063e SH |
2119 | static void vxlan_uninit(struct net_device *dev) |
2120 | { | |
2121 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e SH |
2122 | struct vxlan_sock *vs = vxlan->vn_sock; |
2123 | ||
ba609e9b | 2124 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2125 | |
ebf4063e | 2126 | if (vs) |
012a5729 | 2127 | vxlan_sock_release(vs); |
ebf4063e SH |
2128 | free_percpu(dev->tstats); |
2129 | } | |
2130 | ||
d342894c | 2131 | /* Start ageing timer and join group when device is brought up */ |
2132 | static int vxlan_open(struct net_device *dev) | |
2133 | { | |
2134 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1c51a915 SH |
2135 | struct vxlan_sock *vs = vxlan->vn_sock; |
2136 | ||
2137 | /* socket hasn't been created */ | |
2138 | if (!vs) | |
2139 | return -ENOTCONN; | |
d342894c | 2140 | |
79d4a94f | 2141 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
1c51a915 | 2142 | vxlan_sock_hold(vs); |
7c47cedf | 2143 | dev_hold(dev); |
3fc2de2f | 2144 | queue_work(vxlan_wq, &vxlan->igmp_join); |
d342894c | 2145 | } |
2146 | ||
2147 | if (vxlan->age_interval) | |
2148 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
2149 | ||
2150 | return 0; | |
2151 | } | |
2152 | ||
2153 | /* Purge the forwarding table */ | |
2154 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2155 | { | |
31fec5aa | 2156 | unsigned int h; |
d342894c | 2157 | |
2158 | spin_lock_bh(&vxlan->hash_lock); | |
2159 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2160 | struct hlist_node *p, *n; | |
2161 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2162 | struct vxlan_fdb *f | |
2163 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2164 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2165 | if (!is_zero_ether_addr(f->eth_addr)) | |
2166 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2167 | } |
2168 | } | |
2169 | spin_unlock_bh(&vxlan->hash_lock); | |
2170 | } | |
2171 | ||
2172 | /* Cleanup timer and forwarding table on shutdown */ | |
2173 | static int vxlan_stop(struct net_device *dev) | |
2174 | { | |
3fc2de2f | 2175 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 2176 | struct vxlan_dev *vxlan = netdev_priv(dev); |
1c51a915 | 2177 | struct vxlan_sock *vs = vxlan->vn_sock; |
d342894c | 2178 | |
e4c7ed41 | 2179 | if (vs && vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
95ab0991 | 2180 | !vxlan_group_used(vn, vxlan)) { |
1c51a915 | 2181 | vxlan_sock_hold(vs); |
7c47cedf | 2182 | dev_hold(dev); |
3fc2de2f | 2183 | queue_work(vxlan_wq, &vxlan->igmp_leave); |
7c47cedf | 2184 | } |
d342894c | 2185 | |
2186 | del_timer_sync(&vxlan->age_timer); | |
2187 | ||
2188 | vxlan_flush(vxlan); | |
2189 | ||
2190 | return 0; | |
2191 | } | |
2192 | ||
d342894c | 2193 | /* Stub, nothing needs to be done. */ |
2194 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2195 | { | |
2196 | } | |
2197 | ||
345010b5 DB |
2198 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2199 | { | |
2200 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2201 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2202 | struct net_device *lowerdev; | |
2203 | int max_mtu; | |
2204 | ||
2205 | lowerdev = __dev_get_by_index(dev_net(dev), dst->remote_ifindex); | |
2206 | if (lowerdev == NULL) | |
2207 | return eth_change_mtu(dev, new_mtu); | |
2208 | ||
2209 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
2210 | max_mtu = lowerdev->mtu - VXLAN6_HEADROOM; | |
2211 | else | |
2212 | max_mtu = lowerdev->mtu - VXLAN_HEADROOM; | |
2213 | ||
2214 | if (new_mtu < 68 || new_mtu > max_mtu) | |
2215 | return -EINVAL; | |
2216 | ||
2217 | dev->mtu = new_mtu; | |
2218 | return 0; | |
2219 | } | |
2220 | ||
d342894c | 2221 | static const struct net_device_ops vxlan_netdev_ops = { |
2222 | .ndo_init = vxlan_init, | |
ebf4063e | 2223 | .ndo_uninit = vxlan_uninit, |
d342894c | 2224 | .ndo_open = vxlan_open, |
2225 | .ndo_stop = vxlan_stop, | |
2226 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2227 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2228 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2229 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2230 | .ndo_validate_addr = eth_validate_addr, |
2231 | .ndo_set_mac_address = eth_mac_addr, | |
2232 | .ndo_fdb_add = vxlan_fdb_add, | |
2233 | .ndo_fdb_del = vxlan_fdb_delete, | |
2234 | .ndo_fdb_dump = vxlan_fdb_dump, | |
2235 | }; | |
2236 | ||
2237 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2238 | static struct device_type vxlan_type = { | |
2239 | .name = "vxlan", | |
2240 | }; | |
2241 | ||
53cf5275 | 2242 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2243 | * supply the listening VXLAN udp ports. Callers are expected |
2244 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2245 | */ |
2246 | void vxlan_get_rx_port(struct net_device *dev) | |
2247 | { | |
2248 | struct vxlan_sock *vs; | |
2249 | struct net *net = dev_net(dev); | |
2250 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2251 | sa_family_t sa_family; | |
35e42379 JG |
2252 | __be16 port; |
2253 | unsigned int i; | |
53cf5275 JG |
2254 | |
2255 | spin_lock(&vn->sock_lock); | |
2256 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2257 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2258 | port = inet_sk(vs->sock->sk)->inet_sport; | |
53cf5275 JG |
2259 | sa_family = vs->sock->sk->sk_family; |
2260 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
2261 | port); | |
2262 | } | |
2263 | } | |
2264 | spin_unlock(&vn->sock_lock); | |
2265 | } | |
2266 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2267 | ||
d342894c | 2268 | /* Initialize the device structure. */ |
2269 | static void vxlan_setup(struct net_device *dev) | |
2270 | { | |
2271 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2272 | unsigned int h; |
05f47d69 | 2273 | int low, high; |
d342894c | 2274 | |
2275 | eth_hw_addr_random(dev); | |
2276 | ether_setup(dev); | |
e4c7ed41 CW |
2277 | if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6) |
2278 | dev->hard_header_len = ETH_HLEN + VXLAN6_HEADROOM; | |
2279 | else | |
2280 | dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM; | |
d342894c | 2281 | |
2282 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 2283 | dev->destructor = free_netdev; |
d342894c | 2284 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2285 | ||
2286 | dev->tx_queue_len = 0; | |
2287 | dev->features |= NETIF_F_LLTX; | |
2288 | dev->features |= NETIF_F_NETNS_LOCAL; | |
d6727fe3 | 2289 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2290 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2291 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2292 | |
1eaa8178 PS |
2293 | dev->vlan_features = dev->features; |
2294 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2295 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2296 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2297 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
d342894c | 2298 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
6602d007 | 2299 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 2300 | |
553675fb | 2301 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2302 | spin_lock_init(&vxlan->hash_lock); |
3fc2de2f | 2303 | INIT_WORK(&vxlan->igmp_join, vxlan_igmp_join); |
2304 | INIT_WORK(&vxlan->igmp_leave, vxlan_igmp_leave); | |
1c51a915 | 2305 | INIT_WORK(&vxlan->sock_work, vxlan_sock_work); |
d342894c | 2306 | |
2307 | init_timer_deferrable(&vxlan->age_timer); | |
2308 | vxlan->age_timer.function = vxlan_cleanup; | |
2309 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2310 | ||
0bbf87d8 | 2311 | inet_get_local_port_range(dev_net(dev), &low, &high); |
05f47d69 | 2312 | vxlan->port_min = low; |
2313 | vxlan->port_max = high; | |
823aa873 | 2314 | vxlan->dst_port = htons(vxlan_port); |
05f47d69 | 2315 | |
d342894c | 2316 | vxlan->dev = dev; |
2317 | ||
2318 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
2319 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2320 | } | |
2321 | ||
2322 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
2323 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2324 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2325 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2326 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2327 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2328 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2329 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2330 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
2331 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
2332 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2333 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2334 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2335 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2336 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2337 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2338 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
823aa873 | 2339 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
d342894c | 2340 | }; |
2341 | ||
2342 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2343 | { | |
2344 | if (tb[IFLA_ADDRESS]) { | |
2345 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2346 | pr_debug("invalid link address (not ethernet)\n"); | |
2347 | return -EINVAL; | |
2348 | } | |
2349 | ||
2350 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2351 | pr_debug("invalid all zero ethernet address\n"); | |
2352 | return -EADDRNOTAVAIL; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | if (!data) | |
2357 | return -EINVAL; | |
2358 | ||
2359 | if (data[IFLA_VXLAN_ID]) { | |
2360 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2361 | if (id >= VXLAN_VID_MASK) | |
2362 | return -ERANGE; | |
2363 | } | |
2364 | ||
05f47d69 | 2365 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2366 | const struct ifla_vxlan_port_range *p | |
2367 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2368 | ||
2369 | if (ntohs(p->high) < ntohs(p->low)) { | |
2370 | pr_debug("port range %u .. %u not valid\n", | |
2371 | ntohs(p->low), ntohs(p->high)); | |
2372 | return -EINVAL; | |
2373 | } | |
2374 | } | |
2375 | ||
d342894c | 2376 | return 0; |
2377 | } | |
2378 | ||
1b13c97f YB |
2379 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2380 | struct ethtool_drvinfo *drvinfo) | |
2381 | { | |
2382 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2383 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2384 | } | |
2385 | ||
2386 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2387 | .get_drvinfo = vxlan_get_drvinfo, | |
2388 | .get_link = ethtool_op_get_link, | |
2389 | }; | |
2390 | ||
553675fb | 2391 | static void vxlan_del_work(struct work_struct *work) |
2392 | { | |
2393 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
2394 | ||
2395 | sk_release_kernel(vs->sock->sk); | |
2396 | kfree_rcu(vs, rcu); | |
2397 | } | |
2398 | ||
e4c7ed41 CW |
2399 | #if IS_ENABLED(CONFIG_IPV6) |
2400 | /* Create UDP socket for encapsulation receive. AF_INET6 socket | |
2401 | * could be used for both IPv4 and IPv6 communications, but | |
2402 | * users may set bindv6only=1. | |
2403 | */ | |
39deb2c7 | 2404 | static struct socket *create_v6_sock(struct net *net, __be16 port) |
553675fb | 2405 | { |
553675fb | 2406 | struct sock *sk; |
e4c7ed41 CW |
2407 | struct socket *sock; |
2408 | struct sockaddr_in6 vxlan_addr = { | |
2409 | .sin6_family = AF_INET6, | |
2410 | .sin6_port = port, | |
2411 | }; | |
2412 | int rc, val = 1; | |
2413 | ||
2414 | rc = sock_create_kern(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock); | |
2415 | if (rc < 0) { | |
2416 | pr_debug("UDPv6 socket create failed\n"); | |
39deb2c7 | 2417 | return ERR_PTR(rc); |
e4c7ed41 CW |
2418 | } |
2419 | ||
2420 | /* Put in proper namespace */ | |
2421 | sk = sock->sk; | |
2422 | sk_change_net(sk, net); | |
2423 | ||
2424 | kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY, | |
2425 | (char *)&val, sizeof(val)); | |
2426 | rc = kernel_bind(sock, (struct sockaddr *)&vxlan_addr, | |
2427 | sizeof(struct sockaddr_in6)); | |
2428 | if (rc < 0) { | |
2429 | pr_debug("bind for UDPv6 socket %pI6:%u (%d)\n", | |
2430 | &vxlan_addr.sin6_addr, ntohs(vxlan_addr.sin6_port), rc); | |
2431 | sk_release_kernel(sk); | |
39deb2c7 | 2432 | return ERR_PTR(rc); |
e4c7ed41 CW |
2433 | } |
2434 | /* At this point, IPv6 module should have been loaded in | |
2435 | * sock_create_kern(). | |
2436 | */ | |
2437 | BUG_ON(!ipv6_stub); | |
2438 | ||
e4c7ed41 CW |
2439 | /* Disable multicast loopback */ |
2440 | inet_sk(sk)->mc_loop = 0; | |
39deb2c7 | 2441 | return sock; |
e4c7ed41 CW |
2442 | } |
2443 | ||
2444 | #else | |
2445 | ||
39deb2c7 | 2446 | static struct socket *create_v6_sock(struct net *net, __be16 port) |
e4c7ed41 | 2447 | { |
39deb2c7 | 2448 | return ERR_PTR(-EPFNOSUPPORT); |
e4c7ed41 CW |
2449 | } |
2450 | #endif | |
2451 | ||
39deb2c7 | 2452 | static struct socket *create_v4_sock(struct net *net, __be16 port) |
e4c7ed41 CW |
2453 | { |
2454 | struct sock *sk; | |
2455 | struct socket *sock; | |
553675fb | 2456 | struct sockaddr_in vxlan_addr = { |
2457 | .sin_family = AF_INET, | |
2458 | .sin_addr.s_addr = htonl(INADDR_ANY), | |
bb3fd687 | 2459 | .sin_port = port, |
553675fb | 2460 | }; |
2461 | int rc; | |
553675fb | 2462 | |
2463 | /* Create UDP socket for encapsulation receive. */ | |
e4c7ed41 | 2464 | rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock); |
553675fb | 2465 | if (rc < 0) { |
2466 | pr_debug("UDP socket create failed\n"); | |
39deb2c7 | 2467 | return ERR_PTR(rc); |
553675fb | 2468 | } |
2469 | ||
2470 | /* Put in proper namespace */ | |
e4c7ed41 | 2471 | sk = sock->sk; |
553675fb | 2472 | sk_change_net(sk, net); |
2473 | ||
e4c7ed41 | 2474 | rc = kernel_bind(sock, (struct sockaddr *) &vxlan_addr, |
553675fb | 2475 | sizeof(vxlan_addr)); |
2476 | if (rc < 0) { | |
2477 | pr_debug("bind for UDP socket %pI4:%u (%d)\n", | |
2478 | &vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc); | |
2479 | sk_release_kernel(sk); | |
39deb2c7 | 2480 | return ERR_PTR(rc); |
e4c7ed41 CW |
2481 | } |
2482 | ||
e4c7ed41 CW |
2483 | /* Disable multicast loopback */ |
2484 | inet_sk(sk)->mc_loop = 0; | |
39deb2c7 | 2485 | return sock; |
e4c7ed41 CW |
2486 | } |
2487 | ||
2488 | /* Create new listen socket if needed */ | |
2489 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, | |
2490 | vxlan_rcv_t *rcv, void *data, bool ipv6) | |
2491 | { | |
2492 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2493 | struct vxlan_sock *vs; | |
2494 | struct socket *sock; | |
2495 | struct sock *sk; | |
e4c7ed41 CW |
2496 | unsigned int h; |
2497 | ||
dc01e7d3 | 2498 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2499 | if (!vs) |
2500 | return ERR_PTR(-ENOMEM); | |
2501 | ||
2502 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2503 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2504 | ||
2505 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2506 | ||
2507 | if (ipv6) | |
39deb2c7 | 2508 | sock = create_v6_sock(net, port); |
e4c7ed41 | 2509 | else |
39deb2c7 ZYW |
2510 | sock = create_v4_sock(net, port); |
2511 | if (IS_ERR(sock)) { | |
553675fb | 2512 | kfree(vs); |
e50fddc8 | 2513 | return ERR_CAST(sock); |
553675fb | 2514 | } |
e4c7ed41 CW |
2515 | |
2516 | vs->sock = sock; | |
2517 | sk = sock->sk; | |
9c2e24e1 | 2518 | atomic_set(&vs->refcnt, 1); |
5cfccc5a | 2519 | vs->rcv = rcv; |
012a5729 | 2520 | vs->data = data; |
559835ea | 2521 | rcu_assign_sk_user_data(vs->sock->sk, vs); |
553675fb | 2522 | |
dc01e7d3 OG |
2523 | /* Initialize the vxlan udp offloads structure */ |
2524 | vs->udp_offloads.port = port; | |
2525 | vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive; | |
2526 | vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete; | |
2527 | ||
9c2e24e1 PS |
2528 | spin_lock(&vn->sock_lock); |
2529 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2530 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2531 | spin_unlock(&vn->sock_lock); |
553675fb | 2532 | |
2533 | /* Mark socket as an encapsulation socket. */ | |
2534 | udp_sk(sk)->encap_type = 1; | |
2535 | udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; | |
e4c7ed41 CW |
2536 | #if IS_ENABLED(CONFIG_IPV6) |
2537 | if (ipv6) | |
2538 | ipv6_stub->udpv6_encap_enable(); | |
2539 | else | |
2540 | #endif | |
2541 | udp_encap_enable(); | |
2542 | ||
9c2e24e1 PS |
2543 | return vs; |
2544 | } | |
2545 | ||
012a5729 PS |
2546 | struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
2547 | vxlan_rcv_t *rcv, void *data, | |
e4c7ed41 | 2548 | bool no_share, bool ipv6) |
9c2e24e1 PS |
2549 | { |
2550 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2551 | struct vxlan_sock *vs; | |
2552 | ||
e4c7ed41 | 2553 | vs = vxlan_socket_create(net, port, rcv, data, ipv6); |
9c2e24e1 PS |
2554 | if (!IS_ERR(vs)) |
2555 | return vs; | |
553675fb | 2556 | |
012a5729 PS |
2557 | if (no_share) /* Return error if sharing is not allowed. */ |
2558 | return vs; | |
2559 | ||
9c2e24e1 PS |
2560 | spin_lock(&vn->sock_lock); |
2561 | vs = vxlan_find_sock(net, port); | |
5cfccc5a PS |
2562 | if (vs) { |
2563 | if (vs->rcv == rcv) | |
2564 | atomic_inc(&vs->refcnt); | |
2565 | else | |
2566 | vs = ERR_PTR(-EBUSY); | |
2567 | } | |
2568 | spin_unlock(&vn->sock_lock); | |
2569 | ||
2570 | if (!vs) | |
9c2e24e1 PS |
2571 | vs = ERR_PTR(-EINVAL); |
2572 | ||
553675fb | 2573 | return vs; |
2574 | } | |
012a5729 | 2575 | EXPORT_SYMBOL_GPL(vxlan_sock_add); |
553675fb | 2576 | |
1c51a915 SH |
2577 | /* Scheduled at device creation to bind to a socket */ |
2578 | static void vxlan_sock_work(struct work_struct *work) | |
2579 | { | |
9c2e24e1 PS |
2580 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, sock_work); |
2581 | struct net *net = dev_net(vxlan->dev); | |
1c51a915 | 2582 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
9c2e24e1 PS |
2583 | __be16 port = vxlan->dst_port; |
2584 | struct vxlan_sock *nvs; | |
1c51a915 | 2585 | |
e4c7ed41 | 2586 | nvs = vxlan_sock_add(net, port, vxlan_rcv, NULL, false, vxlan->flags & VXLAN_F_IPV6); |
1c51a915 | 2587 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2588 | if (!IS_ERR(nvs)) |
2589 | vxlan_vs_add_dev(nvs, vxlan); | |
2590 | spin_unlock(&vn->sock_lock); | |
2591 | ||
2592 | dev_put(vxlan->dev); | |
1c51a915 SH |
2593 | } |
2594 | ||
d342894c | 2595 | static int vxlan_newlink(struct net *net, struct net_device *dev, |
2596 | struct nlattr *tb[], struct nlattr *data[]) | |
2597 | { | |
553675fb | 2598 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
d342894c | 2599 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 2600 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 2601 | __u32 vni; |
2602 | int err; | |
e4c7ed41 | 2603 | bool use_ipv6 = false; |
d342894c | 2604 | |
2605 | if (!data[IFLA_VXLAN_ID]) | |
2606 | return -EINVAL; | |
2607 | ||
2608 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); | |
c7995c43 | 2609 | dst->remote_vni = vni; |
d342894c | 2610 | |
5933a7bb MR |
2611 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2612 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 CW |
2613 | if (data[IFLA_VXLAN_GROUP]) { |
2614 | dst->remote_ip.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
e4c7ed41 CW |
2615 | } else if (data[IFLA_VXLAN_GROUP6]) { |
2616 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2617 | return -EPFNOSUPPORT; | |
2618 | ||
2619 | nla_memcpy(&dst->remote_ip.sin6.sin6_addr, data[IFLA_VXLAN_GROUP6], | |
2620 | sizeof(struct in6_addr)); | |
2621 | dst->remote_ip.sa.sa_family = AF_INET6; | |
2622 | use_ipv6 = true; | |
2623 | } | |
d342894c | 2624 | |
e4c7ed41 CW |
2625 | if (data[IFLA_VXLAN_LOCAL]) { |
2626 | vxlan->saddr.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
2627 | vxlan->saddr.sa.sa_family = AF_INET; | |
2628 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2629 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2630 | return -EPFNOSUPPORT; | |
2631 | ||
2632 | /* TODO: respect scope id */ | |
2633 | nla_memcpy(&vxlan->saddr.sin6.sin6_addr, data[IFLA_VXLAN_LOCAL6], | |
2634 | sizeof(struct in6_addr)); | |
2635 | vxlan->saddr.sa.sa_family = AF_INET6; | |
2636 | use_ipv6 = true; | |
2637 | } | |
d342894c | 2638 | |
34e02aa1 | 2639 | if (data[IFLA_VXLAN_LINK] && |
c7995c43 | 2640 | (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { |
34e02aa1 | 2641 | struct net_device *lowerdev |
c7995c43 | 2642 | = __dev_get_by_index(net, dst->remote_ifindex); |
34e02aa1 | 2643 | |
2644 | if (!lowerdev) { | |
c7995c43 | 2645 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2646 | return -ENODEV; |
2647 | } | |
d342894c | 2648 | |
e4c7ed41 CW |
2649 | #if IS_ENABLED(CONFIG_IPV6) |
2650 | if (use_ipv6) { | |
2651 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2652 | if (idev && idev->cnf.disable_ipv6) { | |
2653 | pr_info("IPv6 is disabled via sysctl\n"); | |
2654 | return -EPERM; | |
2655 | } | |
2656 | vxlan->flags |= VXLAN_F_IPV6; | |
2657 | } | |
2658 | #endif | |
2659 | ||
34e02aa1 | 2660 | if (!tb[IFLA_MTU]) |
e4c7ed41 | 2661 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 AD |
2662 | |
2663 | /* update header length based on lower device */ | |
2664 | dev->hard_header_len = lowerdev->hard_header_len + | |
e4c7ed41 | 2665 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
7bda701e | 2666 | } else if (use_ipv6) |
2667 | vxlan->flags |= VXLAN_F_IPV6; | |
d342894c | 2668 | |
2669 | if (data[IFLA_VXLAN_TOS]) | |
2670 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
2671 | ||
afb97186 VB |
2672 | if (data[IFLA_VXLAN_TTL]) |
2673 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
2674 | ||
d342894c | 2675 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 2676 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 2677 | |
2678 | if (data[IFLA_VXLAN_AGEING]) | |
2679 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
2680 | else | |
2681 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
2682 | ||
e4f67add DS |
2683 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
2684 | vxlan->flags |= VXLAN_F_PROXY; | |
2685 | ||
2686 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
2687 | vxlan->flags |= VXLAN_F_RSC; | |
2688 | ||
2689 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
2690 | vxlan->flags |= VXLAN_F_L2MISS; | |
2691 | ||
2692 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
2693 | vxlan->flags |= VXLAN_F_L3MISS; | |
2694 | ||
d342894c | 2695 | if (data[IFLA_VXLAN_LIMIT]) |
2696 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
2697 | ||
05f47d69 | 2698 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2699 | const struct ifla_vxlan_port_range *p | |
2700 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2701 | vxlan->port_min = ntohs(p->low); | |
2702 | vxlan->port_max = ntohs(p->high); | |
2703 | } | |
2704 | ||
823aa873 | 2705 | if (data[IFLA_VXLAN_PORT]) |
2706 | vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
2707 | ||
553675fb | 2708 | if (vxlan_find_vni(net, vni, vxlan->dst_port)) { |
2709 | pr_info("duplicate VNI %u\n", vni); | |
2710 | return -EEXIST; | |
2711 | } | |
2712 | ||
1b13c97f YB |
2713 | SET_ETHTOOL_OPS(dev, &vxlan_ethtool_ops); |
2714 | ||
2936b6ab SS |
2715 | /* create an fdb entry for a valid default destination */ |
2716 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2717 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2718 | &vxlan->default_dst.remote_ip, | |
2719 | NUD_REACHABLE|NUD_PERMANENT, | |
2720 | NLM_F_EXCL|NLM_F_CREATE, | |
2721 | vxlan->dst_port, | |
2722 | vxlan->default_dst.remote_vni, | |
2723 | vxlan->default_dst.remote_ifindex, | |
2724 | NTF_SELF); | |
2725 | if (err) | |
2726 | return err; | |
2727 | } | |
d342894c | 2728 | |
afbd8bae MR |
2729 | err = register_netdevice(dev); |
2730 | if (err) { | |
ba609e9b | 2731 | vxlan_fdb_delete_default(vxlan); |
afbd8bae MR |
2732 | return err; |
2733 | } | |
2734 | ||
553675fb | 2735 | list_add(&vxlan->next, &vn->vxlan_list); |
553675fb | 2736 | |
2737 | return 0; | |
d342894c | 2738 | } |
2739 | ||
2740 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2741 | { | |
fe5c3561 | 2742 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
d342894c | 2743 | struct vxlan_dev *vxlan = netdev_priv(dev); |
2744 | ||
fe5c3561 | 2745 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2746 | if (!hlist_unhashed(&vxlan->hlist)) |
2747 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 2748 | spin_unlock(&vn->sock_lock); |
2749 | ||
553675fb | 2750 | list_del(&vxlan->next); |
d342894c | 2751 | unregister_netdevice_queue(dev, head); |
2752 | } | |
2753 | ||
2754 | static size_t vxlan_get_size(const struct net_device *dev) | |
2755 | { | |
2756 | ||
2757 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 2758 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 2759 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 2760 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 2761 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
2762 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
2763 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
2764 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
2765 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
2766 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
2767 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 2768 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
2769 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 2770 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
823aa873 | 2771 | nla_total_size(sizeof(__be16))+ /* IFLA_VXLAN_PORT */ |
d342894c | 2772 | 0; |
2773 | } | |
2774 | ||
2775 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
2776 | { | |
2777 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 2778 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 2779 | struct ifla_vxlan_port_range ports = { |
2780 | .low = htons(vxlan->port_min), | |
2781 | .high = htons(vxlan->port_max), | |
2782 | }; | |
d342894c | 2783 | |
c7995c43 | 2784 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 2785 | goto nla_put_failure; |
2786 | ||
e4c7ed41 CW |
2787 | if (!vxlan_addr_any(&dst->remote_ip)) { |
2788 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
2789 | if (nla_put_be32(skb, IFLA_VXLAN_GROUP, | |
2790 | dst->remote_ip.sin.sin_addr.s_addr)) | |
2791 | goto nla_put_failure; | |
2792 | #if IS_ENABLED(CONFIG_IPV6) | |
2793 | } else { | |
2794 | if (nla_put(skb, IFLA_VXLAN_GROUP6, sizeof(struct in6_addr), | |
2795 | &dst->remote_ip.sin6.sin6_addr)) | |
2796 | goto nla_put_failure; | |
2797 | #endif | |
2798 | } | |
2799 | } | |
d342894c | 2800 | |
c7995c43 | 2801 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 2802 | goto nla_put_failure; |
2803 | ||
e4c7ed41 CW |
2804 | if (!vxlan_addr_any(&vxlan->saddr)) { |
2805 | if (vxlan->saddr.sa.sa_family == AF_INET) { | |
2806 | if (nla_put_be32(skb, IFLA_VXLAN_LOCAL, | |
2807 | vxlan->saddr.sin.sin_addr.s_addr)) | |
2808 | goto nla_put_failure; | |
2809 | #if IS_ENABLED(CONFIG_IPV6) | |
2810 | } else { | |
2811 | if (nla_put(skb, IFLA_VXLAN_LOCAL6, sizeof(struct in6_addr), | |
2812 | &vxlan->saddr.sin6.sin6_addr)) | |
2813 | goto nla_put_failure; | |
2814 | #endif | |
2815 | } | |
2816 | } | |
d342894c | 2817 | |
2818 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
2819 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
2820 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
2821 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
2822 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
2823 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
2824 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
2825 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
2826 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
2827 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
2828 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 2829 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
823aa873 | 2830 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || |
2831 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port)) | |
d342894c | 2832 | goto nla_put_failure; |
2833 | ||
05f47d69 | 2834 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
2835 | goto nla_put_failure; | |
2836 | ||
d342894c | 2837 | return 0; |
2838 | ||
2839 | nla_put_failure: | |
2840 | return -EMSGSIZE; | |
2841 | } | |
2842 | ||
2843 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { | |
2844 | .kind = "vxlan", | |
2845 | .maxtype = IFLA_VXLAN_MAX, | |
2846 | .policy = vxlan_policy, | |
2847 | .priv_size = sizeof(struct vxlan_dev), | |
2848 | .setup = vxlan_setup, | |
2849 | .validate = vxlan_validate, | |
2850 | .newlink = vxlan_newlink, | |
2851 | .dellink = vxlan_dellink, | |
2852 | .get_size = vxlan_get_size, | |
2853 | .fill_info = vxlan_fill_info, | |
2854 | }; | |
2855 | ||
acaf4e70 DB |
2856 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
2857 | struct net_device *dev) | |
2858 | { | |
2859 | struct vxlan_dev *vxlan, *next; | |
2860 | LIST_HEAD(list_kill); | |
2861 | ||
2862 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
2863 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2864 | ||
2865 | /* In case we created vxlan device with carrier | |
2866 | * and we loose the carrier due to module unload | |
2867 | * we also need to remove vxlan device. In other | |
2868 | * cases, it's not necessary and remote_ifindex | |
2869 | * is 0 here, so no matches. | |
2870 | */ | |
2871 | if (dst->remote_ifindex == dev->ifindex) | |
2872 | vxlan_dellink(vxlan->dev, &list_kill); | |
2873 | } | |
2874 | ||
2875 | unregister_netdevice_many(&list_kill); | |
2876 | } | |
2877 | ||
2878 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
2879 | unsigned long event, void *ptr) | |
2880 | { | |
2881 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 2882 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 2883 | |
783c1463 | 2884 | if (event == NETDEV_UNREGISTER) |
acaf4e70 DB |
2885 | vxlan_handle_lowerdev_unregister(vn, dev); |
2886 | ||
2887 | return NOTIFY_DONE; | |
2888 | } | |
2889 | ||
2890 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
2891 | .notifier_call = vxlan_lowerdev_event, | |
2892 | }; | |
2893 | ||
d342894c | 2894 | static __net_init int vxlan_init_net(struct net *net) |
2895 | { | |
2896 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 2897 | unsigned int h; |
d342894c | 2898 | |
553675fb | 2899 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 2900 | spin_lock_init(&vn->sock_lock); |
d342894c | 2901 | |
553675fb | 2902 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
2903 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 2904 | |
2905 | return 0; | |
2906 | } | |
2907 | ||
d342894c | 2908 | static struct pernet_operations vxlan_net_ops = { |
2909 | .init = vxlan_init_net, | |
d342894c | 2910 | .id = &vxlan_net_id, |
2911 | .size = sizeof(struct vxlan_net), | |
2912 | }; | |
2913 | ||
2914 | static int __init vxlan_init_module(void) | |
2915 | { | |
2916 | int rc; | |
2917 | ||
758c57d1 SH |
2918 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
2919 | if (!vxlan_wq) | |
2920 | return -ENOMEM; | |
2921 | ||
d342894c | 2922 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
2923 | ||
783c1463 | 2924 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 2925 | if (rc) |
2926 | goto out1; | |
2927 | ||
acaf4e70 | 2928 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 2929 | if (rc) |
2930 | goto out2; | |
2931 | ||
acaf4e70 DB |
2932 | rc = rtnl_link_register(&vxlan_link_ops); |
2933 | if (rc) | |
2934 | goto out3; | |
d342894c | 2935 | |
acaf4e70 DB |
2936 | return 0; |
2937 | out3: | |
2938 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 2939 | out2: |
783c1463 | 2940 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 2941 | out1: |
758c57d1 | 2942 | destroy_workqueue(vxlan_wq); |
d342894c | 2943 | return rc; |
2944 | } | |
7332a13b | 2945 | late_initcall(vxlan_init_module); |
d342894c | 2946 | |
2947 | static void __exit vxlan_cleanup_module(void) | |
2948 | { | |
b7153984 | 2949 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 2950 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 2951 | destroy_workqueue(vxlan_wq); |
783c1463 DB |
2952 | unregister_pernet_subsys(&vxlan_net_ops); |
2953 | /* rcu_barrier() is called by netns */ | |
d342894c | 2954 | } |
2955 | module_exit(vxlan_cleanup_module); | |
2956 | ||
2957 | MODULE_LICENSE("GPL"); | |
2958 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 2959 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 2960 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 2961 | MODULE_ALIAS_RTNL_LINK("vxlan"); |