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; |
f01ec1c0 | 130 | struct net *net; /* netns for packet i/o */ |
c7995c43 | 131 | struct vxlan_rdst default_dst; /* default destination */ |
e4c7ed41 | 132 | union vxlan_addr saddr; /* source address */ |
823aa873 | 133 | __be16 dst_port; |
05f47d69 | 134 | __u16 port_min; /* source port range */ |
135 | __u16 port_max; | |
d342894c | 136 | __u8 tos; /* TOS override */ |
137 | __u8 ttl; | |
359a0ea9 | 138 | u32 flags; /* VXLAN_F_* in vxlan.h */ |
d342894c | 139 | |
1c51a915 | 140 | struct work_struct sock_work; |
3fc2de2f | 141 | struct work_struct igmp_join; |
142 | struct work_struct igmp_leave; | |
1c51a915 | 143 | |
d342894c | 144 | unsigned long age_interval; |
145 | struct timer_list age_timer; | |
146 | spinlock_t hash_lock; | |
147 | unsigned int addrcnt; | |
148 | unsigned int addrmax; | |
d342894c | 149 | |
150 | struct hlist_head fdb_head[FDB_HASH_SIZE]; | |
151 | }; | |
152 | ||
153 | /* salt for hash table */ | |
154 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 155 | static struct workqueue_struct *vxlan_wq; |
d342894c | 156 | |
1c51a915 SH |
157 | static void vxlan_sock_work(struct work_struct *work); |
158 | ||
e4c7ed41 CW |
159 | #if IS_ENABLED(CONFIG_IPV6) |
160 | static inline | |
161 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
162 | { | |
163 | if (a->sa.sa_family != b->sa.sa_family) | |
164 | return false; | |
165 | if (a->sa.sa_family == AF_INET6) | |
166 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
167 | else | |
168 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
169 | } | |
170 | ||
171 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
172 | { | |
173 | if (ipa->sa.sa_family == AF_INET6) | |
174 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
175 | else | |
176 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
177 | } | |
178 | ||
179 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
180 | { | |
181 | if (ipa->sa.sa_family == AF_INET6) | |
182 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
183 | else | |
184 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
185 | } | |
186 | ||
187 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
188 | { | |
189 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
190 | nla_memcpy(&ip->sin6.sin6_addr, nla, sizeof(struct in6_addr)); | |
191 | ip->sa.sa_family = AF_INET6; | |
192 | return 0; | |
193 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
194 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
195 | ip->sa.sa_family = AF_INET; | |
196 | return 0; | |
197 | } else { | |
198 | return -EAFNOSUPPORT; | |
199 | } | |
200 | } | |
201 | ||
202 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
203 | const union vxlan_addr *ip) | |
204 | { | |
205 | if (ip->sa.sa_family == AF_INET6) | |
206 | return nla_put(skb, attr, sizeof(struct in6_addr), &ip->sin6.sin6_addr); | |
207 | else | |
208 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
209 | } | |
210 | ||
211 | #else /* !CONFIG_IPV6 */ | |
212 | ||
213 | static inline | |
214 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
215 | { | |
216 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
217 | } | |
218 | ||
219 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
220 | { | |
221 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
222 | } | |
223 | ||
224 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
225 | { | |
226 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
227 | } | |
228 | ||
229 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
230 | { | |
231 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
232 | return -EAFNOSUPPORT; | |
233 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
234 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
235 | ip->sa.sa_family = AF_INET; | |
236 | return 0; | |
237 | } else { | |
238 | return -EAFNOSUPPORT; | |
239 | } | |
240 | } | |
241 | ||
242 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
243 | const union vxlan_addr *ip) | |
244 | { | |
245 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
246 | } | |
247 | #endif | |
248 | ||
553675fb | 249 | /* Virtual Network hash table head */ |
250 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
251 | { | |
252 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
253 | } | |
254 | ||
255 | /* Socket hash table head */ | |
256 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 257 | { |
258 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
259 | ||
553675fb | 260 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
261 | } | |
262 | ||
3e61aa8f SH |
263 | /* First remote destination for a forwarding entry. |
264 | * Guaranteed to be non-NULL because remotes are never deleted. | |
265 | */ | |
5ca5461c | 266 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 267 | { |
5ca5461c | 268 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
269 | } | |
270 | ||
271 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
272 | { | |
273 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
274 | } |
275 | ||
553675fb | 276 | /* Find VXLAN socket based on network namespace and UDP port */ |
9c2e24e1 | 277 | static struct vxlan_sock *vxlan_find_sock(struct net *net, __be16 port) |
553675fb | 278 | { |
279 | struct vxlan_sock *vs; | |
280 | ||
281 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
282 | if (inet_sk(vs->sock->sk)->inet_sport == port) | |
283 | return vs; | |
284 | } | |
285 | return NULL; | |
d342894c | 286 | } |
287 | ||
5cfccc5a | 288 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id) |
d342894c | 289 | { |
290 | struct vxlan_dev *vxlan; | |
d342894c | 291 | |
553675fb | 292 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { |
c7995c43 | 293 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 294 | return vxlan; |
295 | } | |
296 | ||
297 | return NULL; | |
298 | } | |
299 | ||
5cfccc5a PS |
300 | /* Look up VNI in a per net namespace table */ |
301 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, __be16 port) | |
302 | { | |
303 | struct vxlan_sock *vs; | |
304 | ||
305 | vs = vxlan_find_sock(net, port); | |
306 | if (!vs) | |
307 | return NULL; | |
308 | ||
309 | return vxlan_vs_find_vni(vs, id); | |
310 | } | |
311 | ||
d342894c | 312 | /* Fill in neighbour message in skbuff. */ |
313 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
314 | const struct vxlan_fdb *fdb, |
315 | u32 portid, u32 seq, int type, unsigned int flags, | |
316 | const struct vxlan_rdst *rdst) | |
d342894c | 317 | { |
318 | unsigned long now = jiffies; | |
319 | struct nda_cacheinfo ci; | |
320 | struct nlmsghdr *nlh; | |
321 | struct ndmsg *ndm; | |
e4f67add | 322 | bool send_ip, send_eth; |
d342894c | 323 | |
324 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
325 | if (nlh == NULL) | |
326 | return -EMSGSIZE; | |
327 | ||
328 | ndm = nlmsg_data(nlh); | |
329 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
330 | |
331 | send_eth = send_ip = true; | |
332 | ||
333 | if (type == RTM_GETNEIGH) { | |
334 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 335 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
336 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
337 | } else | |
338 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 339 | ndm->ndm_state = fdb->state; |
340 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 341 | ndm->ndm_flags = fdb->flags; |
d342894c | 342 | ndm->ndm_type = NDA_DST; |
343 | ||
e4f67add | 344 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 345 | goto nla_put_failure; |
346 | ||
e4c7ed41 | 347 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
348 | goto nla_put_failure; |
349 | ||
823aa873 | 350 | if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && |
6681712d DS |
351 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
352 | goto nla_put_failure; | |
c7995c43 | 353 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 354 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
355 | goto nla_put_failure; |
356 | if (rdst->remote_ifindex && | |
357 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 358 | goto nla_put_failure; |
359 | ||
360 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
361 | ci.ndm_confirmed = 0; | |
362 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
363 | ci.ndm_refcnt = 0; | |
364 | ||
365 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
366 | goto nla_put_failure; | |
367 | ||
368 | return nlmsg_end(skb, nlh); | |
369 | ||
370 | nla_put_failure: | |
371 | nlmsg_cancel(skb, nlh); | |
372 | return -EMSGSIZE; | |
373 | } | |
374 | ||
375 | static inline size_t vxlan_nlmsg_size(void) | |
376 | { | |
377 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
378 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 379 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 380 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
381 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
382 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
d342894c | 383 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
384 | } | |
385 | ||
9e4b93f9 ND |
386 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
387 | struct vxlan_rdst *rd, int type) | |
d342894c | 388 | { |
389 | struct net *net = dev_net(vxlan->dev); | |
390 | struct sk_buff *skb; | |
391 | int err = -ENOBUFS; | |
392 | ||
393 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
394 | if (skb == NULL) | |
395 | goto errout; | |
396 | ||
9e4b93f9 | 397 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 398 | if (err < 0) { |
399 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
400 | WARN_ON(err == -EMSGSIZE); | |
401 | kfree_skb(skb); | |
402 | goto errout; | |
403 | } | |
404 | ||
405 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
406 | return; | |
407 | errout: | |
408 | if (err < 0) | |
409 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
410 | } | |
411 | ||
e4c7ed41 | 412 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
413 | { |
414 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
415 | struct vxlan_fdb f = { |
416 | .state = NUD_STALE, | |
417 | }; | |
418 | struct vxlan_rdst remote = { | |
e4c7ed41 | 419 | .remote_ip = *ipa, /* goes to NDA_DST */ |
bb3fd687 SH |
420 | .remote_vni = VXLAN_N_VID, |
421 | }; | |
3e61aa8f | 422 | |
9e4b93f9 | 423 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
424 | } |
425 | ||
426 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
427 | { | |
bb3fd687 SH |
428 | struct vxlan_fdb f = { |
429 | .state = NUD_STALE, | |
430 | }; | |
9e4b93f9 | 431 | struct vxlan_rdst remote = { }; |
e4f67add | 432 | |
e4f67add DS |
433 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
434 | ||
9e4b93f9 | 435 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
436 | } |
437 | ||
d342894c | 438 | /* Hash Ethernet address */ |
439 | static u32 eth_hash(const unsigned char *addr) | |
440 | { | |
441 | u64 value = get_unaligned((u64 *)addr); | |
442 | ||
443 | /* only want 6 bytes */ | |
444 | #ifdef __BIG_ENDIAN | |
d342894c | 445 | value >>= 16; |
321fb991 | 446 | #else |
447 | value <<= 16; | |
d342894c | 448 | #endif |
449 | return hash_64(value, FDB_HASH_BITS); | |
450 | } | |
451 | ||
452 | /* Hash chain to use given mac address */ | |
453 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
454 | const u8 *mac) | |
455 | { | |
456 | return &vxlan->fdb_head[eth_hash(mac)]; | |
457 | } | |
458 | ||
459 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 460 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 461 | const u8 *mac) |
d342894c | 462 | { |
463 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
464 | struct vxlan_fdb *f; | |
d342894c | 465 | |
b67bfe0d | 466 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 467 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 468 | return f; |
469 | } | |
470 | ||
471 | return NULL; | |
472 | } | |
473 | ||
014be2c8 SS |
474 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
475 | const u8 *mac) | |
476 | { | |
477 | struct vxlan_fdb *f; | |
478 | ||
479 | f = __vxlan_find_mac(vxlan, mac); | |
480 | if (f) | |
481 | f->used = jiffies; | |
482 | ||
483 | return f; | |
484 | } | |
485 | ||
a5e7c10a MR |
486 | /* caller should hold vxlan->hash_lock */ |
487 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 488 | union vxlan_addr *ip, __be16 port, |
a5e7c10a | 489 | __u32 vni, __u32 ifindex) |
6681712d | 490 | { |
3e61aa8f | 491 | struct vxlan_rdst *rd; |
6681712d | 492 | |
3e61aa8f | 493 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 494 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
495 | rd->remote_port == port && |
496 | rd->remote_vni == vni && | |
497 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 498 | return rd; |
6681712d | 499 | } |
3e61aa8f | 500 | |
a5e7c10a MR |
501 | return NULL; |
502 | } | |
503 | ||
906dc186 TR |
504 | /* Replace destination of unicast mac */ |
505 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
e4c7ed41 | 506 | union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex) |
906dc186 TR |
507 | { |
508 | struct vxlan_rdst *rd; | |
509 | ||
510 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
511 | if (rd) | |
512 | return 0; | |
513 | ||
514 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
515 | if (!rd) | |
516 | return 0; | |
e4c7ed41 | 517 | rd->remote_ip = *ip; |
906dc186 TR |
518 | rd->remote_port = port; |
519 | rd->remote_vni = vni; | |
520 | rd->remote_ifindex = ifindex; | |
521 | return 1; | |
522 | } | |
523 | ||
a5e7c10a MR |
524 | /* Add/update destinations for multicast */ |
525 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
9e4b93f9 ND |
526 | union vxlan_addr *ip, __be16 port, __u32 vni, |
527 | __u32 ifindex, struct vxlan_rdst **rdp) | |
a5e7c10a MR |
528 | { |
529 | struct vxlan_rdst *rd; | |
530 | ||
531 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
532 | if (rd) | |
533 | return 0; | |
534 | ||
6681712d DS |
535 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
536 | if (rd == NULL) | |
537 | return -ENOBUFS; | |
e4c7ed41 | 538 | rd->remote_ip = *ip; |
6681712d DS |
539 | rd->remote_port = port; |
540 | rd->remote_vni = vni; | |
541 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
542 | |
543 | list_add_tail_rcu(&rd->list, &f->remotes); | |
544 | ||
9e4b93f9 | 545 | *rdp = rd; |
6681712d DS |
546 | return 1; |
547 | } | |
548 | ||
dc01e7d3 OG |
549 | static struct sk_buff **vxlan_gro_receive(struct sk_buff **head, struct sk_buff *skb) |
550 | { | |
551 | struct sk_buff *p, **pp = NULL; | |
552 | struct vxlanhdr *vh, *vh2; | |
553 | struct ethhdr *eh, *eh2; | |
554 | unsigned int hlen, off_vx, off_eth; | |
555 | const struct packet_offload *ptype; | |
556 | __be16 type; | |
557 | int flush = 1; | |
558 | ||
559 | off_vx = skb_gro_offset(skb); | |
560 | hlen = off_vx + sizeof(*vh); | |
561 | vh = skb_gro_header_fast(skb, off_vx); | |
562 | if (skb_gro_header_hard(skb, hlen)) { | |
563 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
564 | if (unlikely(!vh)) | |
565 | goto out; | |
566 | } | |
567 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ | |
568 | ||
569 | off_eth = skb_gro_offset(skb); | |
570 | hlen = off_eth + sizeof(*eh); | |
571 | eh = skb_gro_header_fast(skb, off_eth); | |
572 | if (skb_gro_header_hard(skb, hlen)) { | |
573 | eh = skb_gro_header_slow(skb, hlen, off_eth); | |
574 | if (unlikely(!eh)) | |
575 | goto out; | |
576 | } | |
577 | ||
578 | flush = 0; | |
579 | ||
580 | for (p = *head; p; p = p->next) { | |
581 | if (!NAPI_GRO_CB(p)->same_flow) | |
582 | continue; | |
583 | ||
584 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
585 | eh2 = (struct ethhdr *)(p->data + off_eth); | |
586 | if (vh->vx_vni != vh2->vx_vni || compare_ether_header(eh, eh2)) { | |
587 | NAPI_GRO_CB(p)->same_flow = 0; | |
588 | continue; | |
589 | } | |
dc01e7d3 OG |
590 | } |
591 | ||
dc01e7d3 OG |
592 | type = eh->h_proto; |
593 | ||
594 | rcu_read_lock(); | |
595 | ptype = gro_find_receive_by_type(type); | |
596 | if (ptype == NULL) { | |
597 | flush = 1; | |
598 | goto out_unlock; | |
599 | } | |
600 | ||
601 | skb_gro_pull(skb, sizeof(*eh)); /* pull inner eth header */ | |
602 | pp = ptype->callbacks.gro_receive(head, skb); | |
603 | ||
604 | out_unlock: | |
605 | rcu_read_unlock(); | |
606 | out: | |
607 | NAPI_GRO_CB(skb)->flush |= flush; | |
608 | ||
609 | return pp; | |
610 | } | |
611 | ||
612 | static int vxlan_gro_complete(struct sk_buff *skb, int nhoff) | |
613 | { | |
614 | struct ethhdr *eh; | |
615 | struct packet_offload *ptype; | |
616 | __be16 type; | |
617 | int vxlan_len = sizeof(struct vxlanhdr) + sizeof(struct ethhdr); | |
618 | int err = -ENOSYS; | |
619 | ||
620 | eh = (struct ethhdr *)(skb->data + nhoff + sizeof(struct vxlanhdr)); | |
621 | type = eh->h_proto; | |
622 | ||
623 | rcu_read_lock(); | |
624 | ptype = gro_find_complete_by_type(type); | |
625 | if (ptype != NULL) | |
626 | err = ptype->callbacks.gro_complete(skb, nhoff + vxlan_len); | |
627 | ||
628 | rcu_read_unlock(); | |
629 | return err; | |
630 | } | |
631 | ||
53cf5275 | 632 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 633 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
634 | { |
635 | struct net_device *dev; | |
dc01e7d3 | 636 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
637 | struct net *net = sock_net(sk); |
638 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 639 | __be16 port = inet_sk(sk)->inet_sport; |
dc01e7d3 OG |
640 | int err; |
641 | ||
642 | if (sa_family == AF_INET) { | |
643 | err = udp_add_offload(&vs->udp_offloads); | |
644 | if (err) | |
645 | pr_warn("vxlan: udp_add_offload failed with status %d\n", err); | |
646 | } | |
53cf5275 JG |
647 | |
648 | rcu_read_lock(); | |
649 | for_each_netdev_rcu(net, dev) { | |
650 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
651 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
652 | port); | |
653 | } | |
654 | rcu_read_unlock(); | |
655 | } | |
656 | ||
657 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 658 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
659 | { |
660 | struct net_device *dev; | |
dc01e7d3 | 661 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
662 | struct net *net = sock_net(sk); |
663 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 664 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
665 | |
666 | rcu_read_lock(); | |
667 | for_each_netdev_rcu(net, dev) { | |
668 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
669 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
670 | port); | |
671 | } | |
672 | rcu_read_unlock(); | |
dc01e7d3 OG |
673 | |
674 | if (sa_family == AF_INET) | |
675 | udp_del_offload(&vs->udp_offloads); | |
53cf5275 JG |
676 | } |
677 | ||
d342894c | 678 | /* Add new entry to forwarding table -- assumes lock held */ |
679 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 680 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 681 | __u16 state, __u16 flags, |
73cf3317 | 682 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 683 | __u8 ndm_flags) |
d342894c | 684 | { |
9e4b93f9 | 685 | struct vxlan_rdst *rd = NULL; |
d342894c | 686 | struct vxlan_fdb *f; |
687 | int notify = 0; | |
688 | ||
014be2c8 | 689 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 690 | if (f) { |
691 | if (flags & NLM_F_EXCL) { | |
692 | netdev_dbg(vxlan->dev, | |
693 | "lost race to create %pM\n", mac); | |
694 | return -EEXIST; | |
695 | } | |
696 | if (f->state != state) { | |
697 | f->state = state; | |
698 | f->updated = jiffies; | |
699 | notify = 1; | |
700 | } | |
ae884082 DS |
701 | if (f->flags != ndm_flags) { |
702 | f->flags = ndm_flags; | |
703 | f->updated = jiffies; | |
704 | notify = 1; | |
705 | } | |
906dc186 TR |
706 | if ((flags & NLM_F_REPLACE)) { |
707 | /* Only change unicasts */ | |
708 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
709 | is_zero_ether_addr(f->eth_addr))) { | |
710 | int rc = vxlan_fdb_replace(f, ip, port, vni, | |
711 | ifindex); | |
712 | ||
713 | if (rc < 0) | |
714 | return rc; | |
715 | notify |= rc; | |
716 | } else | |
717 | return -EOPNOTSUPP; | |
718 | } | |
6681712d | 719 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
720 | (is_multicast_ether_addr(f->eth_addr) || |
721 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
722 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
723 | &rd); | |
6681712d DS |
724 | |
725 | if (rc < 0) | |
726 | return rc; | |
727 | notify |= rc; | |
728 | } | |
d342894c | 729 | } else { |
730 | if (!(flags & NLM_F_CREATE)) | |
731 | return -ENOENT; | |
732 | ||
733 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
734 | return -ENOSPC; | |
735 | ||
906dc186 TR |
736 | /* Disallow replace to add a multicast entry */ |
737 | if ((flags & NLM_F_REPLACE) && | |
738 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
739 | return -EOPNOTSUPP; | |
740 | ||
e4c7ed41 | 741 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 742 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
743 | if (!f) | |
744 | return -ENOMEM; | |
745 | ||
746 | notify = 1; | |
d342894c | 747 | f->state = state; |
ae884082 | 748 | f->flags = ndm_flags; |
d342894c | 749 | f->updated = f->used = jiffies; |
3e61aa8f | 750 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 751 | memcpy(f->eth_addr, mac, ETH_ALEN); |
752 | ||
9e4b93f9 | 753 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 754 | |
d342894c | 755 | ++vxlan->addrcnt; |
756 | hlist_add_head_rcu(&f->hlist, | |
757 | vxlan_fdb_head(vxlan, mac)); | |
758 | } | |
759 | ||
9e4b93f9 ND |
760 | if (notify) { |
761 | if (rd == NULL) | |
762 | rd = first_remote_rtnl(f); | |
763 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
764 | } | |
d342894c | 765 | |
766 | return 0; | |
767 | } | |
768 | ||
6706c82e | 769 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
770 | { |
771 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 772 | struct vxlan_rdst *rd, *nd; |
6681712d | 773 | |
3e61aa8f | 774 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 775 | kfree(rd); |
6681712d DS |
776 | kfree(f); |
777 | } | |
778 | ||
d342894c | 779 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
780 | { | |
781 | netdev_dbg(vxlan->dev, | |
782 | "delete %pM\n", f->eth_addr); | |
783 | ||
784 | --vxlan->addrcnt; | |
9e4b93f9 | 785 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 786 | |
787 | hlist_del_rcu(&f->hlist); | |
6681712d | 788 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 789 | } |
790 | ||
f0b074be | 791 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
e4c7ed41 | 792 | union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex) |
d342894c | 793 | { |
6681712d | 794 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 795 | int err; |
d342894c | 796 | |
f0b074be | 797 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
798 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
799 | if (err) | |
800 | return err; | |
f0b074be | 801 | } else { |
e4c7ed41 CW |
802 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
803 | if (remote->sa.sa_family == AF_INET) { | |
804 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
805 | ip->sa.sa_family = AF_INET; | |
806 | #if IS_ENABLED(CONFIG_IPV6) | |
807 | } else { | |
808 | ip->sin6.sin6_addr = in6addr_any; | |
809 | ip->sa.sa_family = AF_INET6; | |
810 | #endif | |
811 | } | |
f0b074be | 812 | } |
d342894c | 813 | |
6681712d | 814 | if (tb[NDA_PORT]) { |
73cf3317 | 815 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 816 | return -EINVAL; |
f0b074be MR |
817 | *port = nla_get_be16(tb[NDA_PORT]); |
818 | } else { | |
819 | *port = vxlan->dst_port; | |
820 | } | |
6681712d DS |
821 | |
822 | if (tb[NDA_VNI]) { | |
823 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
824 | return -EINVAL; | |
f0b074be MR |
825 | *vni = nla_get_u32(tb[NDA_VNI]); |
826 | } else { | |
827 | *vni = vxlan->default_dst.remote_vni; | |
828 | } | |
6681712d DS |
829 | |
830 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 831 | struct net_device *tdev; |
6681712d DS |
832 | |
833 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
834 | return -EINVAL; | |
f0b074be | 835 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 836 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 837 | if (!tdev) |
6681712d | 838 | return -EADDRNOTAVAIL; |
f0b074be MR |
839 | } else { |
840 | *ifindex = 0; | |
841 | } | |
842 | ||
843 | return 0; | |
844 | } | |
845 | ||
846 | /* Add static entry (via netlink) */ | |
847 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
848 | struct net_device *dev, | |
849 | const unsigned char *addr, u16 flags) | |
850 | { | |
851 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
852 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 853 | union vxlan_addr ip; |
f0b074be MR |
854 | __be16 port; |
855 | u32 vni, ifindex; | |
856 | int err; | |
857 | ||
858 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
859 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
860 | ndm->ndm_state); | |
861 | return -EINVAL; | |
862 | } | |
863 | ||
864 | if (tb[NDA_DST] == NULL) | |
865 | return -EINVAL; | |
866 | ||
867 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
868 | if (err) | |
869 | return err; | |
6681712d | 870 | |
5933a7bb MR |
871 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
872 | return -EAFNOSUPPORT; | |
873 | ||
d342894c | 874 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 875 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 876 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 877 | spin_unlock_bh(&vxlan->hash_lock); |
878 | ||
879 | return err; | |
880 | } | |
881 | ||
882 | /* Delete entry (via netlink) */ | |
1690be63 VY |
883 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
884 | struct net_device *dev, | |
d342894c | 885 | const unsigned char *addr) |
886 | { | |
887 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
888 | struct vxlan_fdb *f; | |
bc7892ba | 889 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 890 | union vxlan_addr ip; |
bc7892ba MR |
891 | __be16 port; |
892 | u32 vni, ifindex; | |
893 | int err; | |
894 | ||
895 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
896 | if (err) | |
897 | return err; | |
898 | ||
899 | err = -ENOENT; | |
d342894c | 900 | |
901 | spin_lock_bh(&vxlan->hash_lock); | |
902 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
903 | if (!f) |
904 | goto out; | |
905 | ||
e4c7ed41 CW |
906 | if (!vxlan_addr_any(&ip)) { |
907 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
908 | if (!rd) |
909 | goto out; | |
910 | } | |
911 | ||
912 | err = 0; | |
913 | ||
914 | /* remove a destination if it's not the only one on the list, | |
915 | * otherwise destroy the fdb entry | |
916 | */ | |
917 | if (rd && !list_is_singular(&f->remotes)) { | |
918 | list_del_rcu(&rd->list); | |
9e4b93f9 | 919 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 920 | kfree_rcu(rd, rcu); |
bc7892ba | 921 | goto out; |
d342894c | 922 | } |
bc7892ba MR |
923 | |
924 | vxlan_fdb_destroy(vxlan, f); | |
925 | ||
926 | out: | |
d342894c | 927 | spin_unlock_bh(&vxlan->hash_lock); |
928 | ||
929 | return err; | |
930 | } | |
931 | ||
932 | /* Dump forwarding table */ | |
933 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
934 | struct net_device *dev, int idx) | |
935 | { | |
936 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
937 | unsigned int h; | |
938 | ||
939 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
940 | struct vxlan_fdb *f; | |
d342894c | 941 | int err; |
942 | ||
b67bfe0d | 943 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 944 | struct vxlan_rdst *rd; |
6681712d | 945 | |
3e61aa8f SH |
946 | if (idx < cb->args[0]) |
947 | goto skip; | |
948 | ||
949 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
950 | err = vxlan_fdb_info(skb, vxlan, f, |
951 | NETLINK_CB(cb->skb).portid, | |
952 | cb->nlh->nlmsg_seq, | |
953 | RTM_NEWNEIGH, | |
954 | NLM_F_MULTI, rd); | |
955 | if (err < 0) | |
3e61aa8f | 956 | goto out; |
6681712d | 957 | } |
3e61aa8f SH |
958 | skip: |
959 | ++idx; | |
d342894c | 960 | } |
961 | } | |
3e61aa8f | 962 | out: |
d342894c | 963 | return idx; |
964 | } | |
965 | ||
966 | /* Watch incoming packets to learn mapping between Ethernet address | |
967 | * and Tunnel endpoint. | |
26a41ae6 | 968 | * Return true if packet is bogus and should be droppped. |
d342894c | 969 | */ |
26a41ae6 | 970 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 971 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 972 | { |
973 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
974 | struct vxlan_fdb *f; | |
d342894c | 975 | |
976 | f = vxlan_find_mac(vxlan, src_mac); | |
977 | if (likely(f)) { | |
5ca5461c | 978 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 979 | |
e4c7ed41 | 980 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 981 | return false; |
982 | ||
983 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 984 | if (f->state & NUD_NOARP) |
26a41ae6 | 985 | return true; |
d342894c | 986 | |
987 | if (net_ratelimit()) | |
988 | netdev_info(dev, | |
e4c7ed41 | 989 | "%pM migrated from %pIS to %pIS\n", |
3e61aa8f | 990 | src_mac, &rdst->remote_ip, &src_ip); |
d342894c | 991 | |
e4c7ed41 | 992 | rdst->remote_ip = *src_ip; |
d342894c | 993 | f->updated = jiffies; |
9e4b93f9 | 994 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 995 | } else { |
996 | /* learned new entry */ | |
997 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 998 | |
999 | /* close off race between vxlan_flush and incoming packets */ | |
1000 | if (netif_running(dev)) | |
1001 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
1002 | NUD_REACHABLE, | |
1003 | NLM_F_EXCL|NLM_F_CREATE, | |
1004 | vxlan->dst_port, | |
1005 | vxlan->default_dst.remote_vni, | |
1006 | 0, NTF_SELF); | |
d342894c | 1007 | spin_unlock(&vxlan->hash_lock); |
1008 | } | |
26a41ae6 | 1009 | |
1010 | return false; | |
d342894c | 1011 | } |
1012 | ||
d342894c | 1013 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1014 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1015 | { |
553675fb | 1016 | struct vxlan_dev *vxlan; |
d342894c | 1017 | |
95ab0991 G |
1018 | /* The vxlan_sock is only used by dev, leaving group has |
1019 | * no effect on other vxlan devices. | |
1020 | */ | |
1021 | if (atomic_read(&dev->vn_sock->refcnt) == 1) | |
1022 | return false; | |
1023 | ||
553675fb | 1024 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1025 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1026 | continue; |
d342894c | 1027 | |
95ab0991 G |
1028 | if (vxlan->vn_sock != dev->vn_sock) |
1029 | continue; | |
1030 | ||
1031 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1032 | &dev->default_dst.remote_ip)) | |
1033 | continue; | |
1034 | ||
1035 | if (vxlan->default_dst.remote_ifindex != | |
1036 | dev->default_dst.remote_ifindex) | |
1037 | continue; | |
1038 | ||
1039 | return true; | |
553675fb | 1040 | } |
d342894c | 1041 | |
1042 | return false; | |
1043 | } | |
1044 | ||
7c47cedf | 1045 | static void vxlan_sock_hold(struct vxlan_sock *vs) |
d342894c | 1046 | { |
7c47cedf SH |
1047 | atomic_inc(&vs->refcnt); |
1048 | } | |
d342894c | 1049 | |
012a5729 | 1050 | void vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 1051 | { |
53cf5275 JG |
1052 | struct sock *sk = vs->sock->sk; |
1053 | struct net *net = sock_net(sk); | |
1054 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
012a5729 | 1055 | |
7c47cedf SH |
1056 | if (!atomic_dec_and_test(&vs->refcnt)) |
1057 | return; | |
d342894c | 1058 | |
1c51a915 | 1059 | spin_lock(&vn->sock_lock); |
7c47cedf | 1060 | hlist_del_rcu(&vs->hlist); |
559835ea | 1061 | rcu_assign_sk_user_data(vs->sock->sk, NULL); |
dc01e7d3 | 1062 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1063 | spin_unlock(&vn->sock_lock); |
1064 | ||
7c47cedf | 1065 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 1066 | } |
012a5729 | 1067 | EXPORT_SYMBOL_GPL(vxlan_sock_release); |
d342894c | 1068 | |
3fc2de2f | 1069 | /* Callback to update multicast group membership when first VNI on |
1070 | * multicast asddress is brought up | |
1071 | * Done as workqueue because ip_mc_join_group acquires RTNL. | |
7c47cedf | 1072 | */ |
3fc2de2f | 1073 | static void vxlan_igmp_join(struct work_struct *work) |
d342894c | 1074 | { |
3fc2de2f | 1075 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_join); |
7c47cedf SH |
1076 | struct vxlan_sock *vs = vxlan->vn_sock; |
1077 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1078 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1079 | int ifindex = vxlan->default_dst.remote_ifindex; | |
d342894c | 1080 | |
d342894c | 1081 | lock_sock(sk); |
e4c7ed41 CW |
1082 | if (ip->sa.sa_family == AF_INET) { |
1083 | struct ip_mreqn mreq = { | |
1084 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1085 | .imr_ifindex = ifindex, | |
1086 | }; | |
1087 | ||
1088 | ip_mc_join_group(sk, &mreq); | |
1089 | #if IS_ENABLED(CONFIG_IPV6) | |
1090 | } else { | |
1091 | ipv6_stub->ipv6_sock_mc_join(sk, ifindex, | |
1092 | &ip->sin6.sin6_addr); | |
1093 | #endif | |
1094 | } | |
3fc2de2f | 1095 | release_sock(sk); |
1096 | ||
012a5729 | 1097 | vxlan_sock_release(vs); |
3fc2de2f | 1098 | dev_put(vxlan->dev); |
1099 | } | |
1100 | ||
1101 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
1102 | static void vxlan_igmp_leave(struct work_struct *work) | |
1103 | { | |
1104 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_leave); | |
3fc2de2f | 1105 | struct vxlan_sock *vs = vxlan->vn_sock; |
1106 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1107 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1108 | int ifindex = vxlan->default_dst.remote_ifindex; | |
3fc2de2f | 1109 | |
1110 | lock_sock(sk); | |
e4c7ed41 CW |
1111 | if (ip->sa.sa_family == AF_INET) { |
1112 | struct ip_mreqn mreq = { | |
1113 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1114 | .imr_ifindex = ifindex, | |
1115 | }; | |
1116 | ||
1117 | ip_mc_leave_group(sk, &mreq); | |
1118 | #if IS_ENABLED(CONFIG_IPV6) | |
1119 | } else { | |
1120 | ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, | |
1121 | &ip->sin6.sin6_addr); | |
1122 | #endif | |
1123 | } | |
1124 | ||
d342894c | 1125 | release_sock(sk); |
d342894c | 1126 | |
012a5729 | 1127 | vxlan_sock_release(vs); |
7c47cedf | 1128 | dev_put(vxlan->dev); |
d342894c | 1129 | } |
1130 | ||
1131 | /* Callback from net/ipv4/udp.c to receive packets */ | |
1132 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
1133 | { | |
5cfccc5a | 1134 | struct vxlan_sock *vs; |
d342894c | 1135 | struct vxlanhdr *vxh; |
d342894c | 1136 | |
d342894c | 1137 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1138 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 1139 | goto error; |
1140 | ||
7ce04758 PS |
1141 | /* Return packets with reserved bits set */ |
1142 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
d342894c | 1143 | if (vxh->vx_flags != htonl(VXLAN_FLAGS) || |
1144 | (vxh->vx_vni & htonl(0xff))) { | |
1145 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1146 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
1147 | goto error; | |
1148 | } | |
1149 | ||
5cfccc5a PS |
1150 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
1151 | goto drop; | |
1152 | ||
559835ea | 1153 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1154 | if (!vs) |
d342894c | 1155 | goto drop; |
d342894c | 1156 | |
d0bc6555 OG |
1157 | /* If the NIC driver gave us an encapsulated packet |
1158 | * with the encapsulation mark, the device checksummed it | |
1159 | * for us. Otherwise force the upper layers to verify it. | |
1160 | */ | |
1161 | if ((skb->ip_summed != CHECKSUM_UNNECESSARY && skb->ip_summed != CHECKSUM_PARTIAL) || | |
1162 | !skb->encapsulation) | |
1163 | skb->ip_summed = CHECKSUM_NONE; | |
1164 | ||
1165 | skb->encapsulation = 0; | |
1166 | ||
5cfccc5a PS |
1167 | vs->rcv(vs, skb, vxh->vx_vni); |
1168 | return 0; | |
1169 | ||
1170 | drop: | |
1171 | /* Consume bad packet */ | |
1172 | kfree_skb(skb); | |
1173 | return 0; | |
1174 | ||
1175 | error: | |
1176 | /* Return non vxlan pkt */ | |
1177 | return 1; | |
1178 | } | |
1179 | ||
1180 | static void vxlan_rcv(struct vxlan_sock *vs, | |
1181 | struct sk_buff *skb, __be32 vx_vni) | |
1182 | { | |
e4c7ed41 CW |
1183 | struct iphdr *oip = NULL; |
1184 | struct ipv6hdr *oip6 = NULL; | |
5cfccc5a | 1185 | struct vxlan_dev *vxlan; |
8f84985f | 1186 | struct pcpu_sw_netstats *stats; |
e4c7ed41 | 1187 | union vxlan_addr saddr; |
5cfccc5a | 1188 | __u32 vni; |
e4c7ed41 CW |
1189 | int err = 0; |
1190 | union vxlan_addr *remote_ip; | |
5cfccc5a PS |
1191 | |
1192 | vni = ntohl(vx_vni) >> 8; | |
1193 | /* Is this VNI defined? */ | |
1194 | vxlan = vxlan_vs_find_vni(vs, vni); | |
1195 | if (!vxlan) | |
d342894c | 1196 | goto drop; |
d342894c | 1197 | |
e4c7ed41 | 1198 | remote_ip = &vxlan->default_dst.remote_ip; |
e4f67add | 1199 | skb_reset_mac_header(skb); |
f01ec1c0 | 1200 | skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev))); |
d342894c | 1201 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
d342894c | 1202 | |
1203 | /* Ignore packet loops (and multicast echo) */ | |
7367d0b5 | 1204 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) |
d342894c | 1205 | goto drop; |
1206 | ||
7ce04758 | 1207 | /* Re-examine inner Ethernet packet */ |
e4c7ed41 CW |
1208 | if (remote_ip->sa.sa_family == AF_INET) { |
1209 | oip = ip_hdr(skb); | |
1210 | saddr.sin.sin_addr.s_addr = oip->saddr; | |
1211 | saddr.sa.sa_family = AF_INET; | |
1212 | #if IS_ENABLED(CONFIG_IPV6) | |
1213 | } else { | |
1214 | oip6 = ipv6_hdr(skb); | |
1215 | saddr.sin6.sin6_addr = oip6->saddr; | |
1216 | saddr.sa.sa_family = AF_INET6; | |
1217 | #endif | |
1218 | } | |
1219 | ||
26a41ae6 | 1220 | if ((vxlan->flags & VXLAN_F_LEARN) && |
e4c7ed41 | 1221 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) |
26a41ae6 | 1222 | goto drop; |
d342894c | 1223 | |
d342894c | 1224 | skb_reset_network_header(skb); |
0afb1666 | 1225 | |
e4c7ed41 CW |
1226 | if (oip6) |
1227 | err = IP6_ECN_decapsulate(oip6, skb); | |
1228 | if (oip) | |
1229 | err = IP_ECN_decapsulate(oip, skb); | |
1230 | ||
d342894c | 1231 | if (unlikely(err)) { |
e4c7ed41 CW |
1232 | if (log_ecn_error) { |
1233 | if (oip6) | |
1234 | net_info_ratelimited("non-ECT from %pI6\n", | |
1235 | &oip6->saddr); | |
1236 | if (oip) | |
1237 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1238 | &oip->saddr, oip->tos); | |
1239 | } | |
d342894c | 1240 | if (err > 1) { |
1241 | ++vxlan->dev->stats.rx_frame_errors; | |
1242 | ++vxlan->dev->stats.rx_errors; | |
1243 | goto drop; | |
1244 | } | |
1245 | } | |
1246 | ||
e8171045 | 1247 | stats = this_cpu_ptr(vxlan->dev->tstats); |
d342894c | 1248 | u64_stats_update_begin(&stats->syncp); |
1249 | stats->rx_packets++; | |
1250 | stats->rx_bytes += skb->len; | |
1251 | u64_stats_update_end(&stats->syncp); | |
1252 | ||
1253 | netif_rx(skb); | |
1254 | ||
5cfccc5a | 1255 | return; |
d342894c | 1256 | drop: |
1257 | /* Consume bad packet */ | |
1258 | kfree_skb(skb); | |
d342894c | 1259 | } |
1260 | ||
e4f67add DS |
1261 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1262 | { | |
1263 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1264 | struct arphdr *parp; | |
1265 | u8 *arpptr, *sha; | |
1266 | __be32 sip, tip; | |
1267 | struct neighbour *n; | |
1268 | ||
1269 | if (dev->flags & IFF_NOARP) | |
1270 | goto out; | |
1271 | ||
1272 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1273 | dev->stats.tx_dropped++; | |
1274 | goto out; | |
1275 | } | |
1276 | parp = arp_hdr(skb); | |
1277 | ||
1278 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1279 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1280 | parp->ar_pro != htons(ETH_P_IP) || | |
1281 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1282 | parp->ar_hln != dev->addr_len || | |
1283 | parp->ar_pln != 4) | |
1284 | goto out; | |
1285 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1286 | sha = arpptr; | |
1287 | arpptr += dev->addr_len; /* sha */ | |
1288 | memcpy(&sip, arpptr, sizeof(sip)); | |
1289 | arpptr += sizeof(sip); | |
1290 | arpptr += dev->addr_len; /* tha */ | |
1291 | memcpy(&tip, arpptr, sizeof(tip)); | |
1292 | ||
1293 | if (ipv4_is_loopback(tip) || | |
1294 | ipv4_is_multicast(tip)) | |
1295 | goto out; | |
1296 | ||
1297 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1298 | ||
1299 | if (n) { | |
e4f67add DS |
1300 | struct vxlan_fdb *f; |
1301 | struct sk_buff *reply; | |
1302 | ||
1303 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1304 | neigh_release(n); | |
1305 | goto out; | |
1306 | } | |
1307 | ||
1308 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1309 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1310 | /* bridge-local neighbor */ |
1311 | neigh_release(n); | |
1312 | goto out; | |
1313 | } | |
1314 | ||
1315 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1316 | n->ha, sha); | |
1317 | ||
1318 | neigh_release(n); | |
1319 | ||
7346135d DS |
1320 | if (reply == NULL) |
1321 | goto out; | |
1322 | ||
e4f67add DS |
1323 | skb_reset_mac_header(reply); |
1324 | __skb_pull(reply, skb_network_offset(reply)); | |
1325 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1326 | reply->pkt_type = PACKET_HOST; | |
1327 | ||
1328 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1329 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1330 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1331 | union vxlan_addr ipa = { | |
1332 | .sin.sin_addr.s_addr = tip, | |
1333 | .sa.sa_family = AF_INET, | |
1334 | }; | |
1335 | ||
1336 | vxlan_ip_miss(dev, &ipa); | |
1337 | } | |
e4f67add DS |
1338 | out: |
1339 | consume_skb(skb); | |
1340 | return NETDEV_TX_OK; | |
1341 | } | |
1342 | ||
f564f45c | 1343 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1344 | |
1345 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, | |
1346 | struct neighbour *n, bool isrouter) | |
1347 | { | |
1348 | struct net_device *dev = request->dev; | |
1349 | struct sk_buff *reply; | |
1350 | struct nd_msg *ns, *na; | |
1351 | struct ipv6hdr *pip6; | |
1352 | u8 *daddr; | |
1353 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1354 | int ns_olen; | |
1355 | int i, len; | |
1356 | ||
1357 | if (dev == NULL) | |
1358 | return NULL; | |
1359 | ||
1360 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1361 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1362 | reply = alloc_skb(len, GFP_ATOMIC); | |
1363 | if (reply == NULL) | |
1364 | return NULL; | |
1365 | ||
1366 | reply->protocol = htons(ETH_P_IPV6); | |
1367 | reply->dev = dev; | |
1368 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1369 | skb_push(reply, sizeof(struct ethhdr)); | |
1370 | skb_set_mac_header(reply, 0); | |
1371 | ||
1372 | ns = (struct nd_msg *)skb_transport_header(request); | |
1373 | ||
1374 | daddr = eth_hdr(request)->h_source; | |
1375 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1376 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1377 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1378 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1379 | break; | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | /* Ethernet header */ | |
1384 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1385 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1386 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1387 | reply->protocol = htons(ETH_P_IPV6); | |
1388 | ||
1389 | skb_pull(reply, sizeof(struct ethhdr)); | |
1390 | skb_set_network_header(reply, 0); | |
1391 | skb_put(reply, sizeof(struct ipv6hdr)); | |
1392 | ||
1393 | /* IPv6 header */ | |
1394 | ||
1395 | pip6 = ipv6_hdr(reply); | |
1396 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1397 | pip6->version = 6; | |
1398 | pip6->priority = ipv6_hdr(request)->priority; | |
1399 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1400 | pip6->hop_limit = 255; | |
1401 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1402 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1403 | ||
1404 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
1405 | skb_set_transport_header(reply, 0); | |
1406 | ||
1407 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1408 | ||
1409 | /* Neighbor Advertisement */ | |
1410 | memset(na, 0, sizeof(*na)+na_olen); | |
1411 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1412 | na->icmph.icmp6_router = isrouter; | |
1413 | na->icmph.icmp6_override = 1; | |
1414 | na->icmph.icmp6_solicited = 1; | |
1415 | na->target = ns->target; | |
1416 | ether_addr_copy(&na->opt[2], n->ha); | |
1417 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1418 | na->opt[1] = na_olen >> 3; | |
1419 | ||
1420 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1421 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1422 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1423 | ||
1424 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1425 | ||
1426 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1427 | ||
1428 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1429 | ||
1430 | return reply; | |
1431 | } | |
1432 | ||
f564f45c CW |
1433 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1434 | { | |
1435 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1436 | struct nd_msg *msg; |
f564f45c CW |
1437 | const struct ipv6hdr *iphdr; |
1438 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1439 | struct neighbour *n; |
1440 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1441 | |
1442 | in6_dev = __in6_dev_get(dev); | |
1443 | if (!in6_dev) | |
1444 | goto out; | |
1445 | ||
1446 | if (!pskb_may_pull(skb, skb->len)) | |
1447 | goto out; | |
1448 | ||
1449 | iphdr = ipv6_hdr(skb); | |
1450 | saddr = &iphdr->saddr; | |
1451 | daddr = &iphdr->daddr; | |
1452 | ||
f564f45c CW |
1453 | msg = (struct nd_msg *)skb_transport_header(skb); |
1454 | if (msg->icmph.icmp6_code != 0 || | |
1455 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1456 | goto out; | |
1457 | ||
4b29dba9 DS |
1458 | if (ipv6_addr_loopback(daddr) || |
1459 | ipv6_addr_is_multicast(&msg->target)) | |
1460 | goto out; | |
1461 | ||
1462 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1463 | |
1464 | if (n) { | |
1465 | struct vxlan_fdb *f; | |
4b29dba9 | 1466 | struct sk_buff *reply; |
f564f45c CW |
1467 | |
1468 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1469 | neigh_release(n); | |
1470 | goto out; | |
1471 | } | |
1472 | ||
1473 | f = vxlan_find_mac(vxlan, n->ha); | |
1474 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1475 | /* bridge-local neighbor */ | |
1476 | neigh_release(n); | |
1477 | goto out; | |
1478 | } | |
1479 | ||
4b29dba9 DS |
1480 | reply = vxlan_na_create(skb, n, |
1481 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1482 | ||
f564f45c | 1483 | neigh_release(n); |
4b29dba9 DS |
1484 | |
1485 | if (reply == NULL) | |
1486 | goto out; | |
1487 | ||
1488 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1489 | dev->stats.rx_dropped++; | |
1490 | ||
f564f45c | 1491 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1492 | union vxlan_addr ipa = { |
1493 | .sin6.sin6_addr = msg->target, | |
1494 | .sa.sa_family = AF_INET6, | |
1495 | }; | |
1496 | ||
f564f45c CW |
1497 | vxlan_ip_miss(dev, &ipa); |
1498 | } | |
1499 | ||
1500 | out: | |
1501 | consume_skb(skb); | |
1502 | return NETDEV_TX_OK; | |
1503 | } | |
1504 | #endif | |
1505 | ||
e4f67add DS |
1506 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1507 | { | |
1508 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1509 | struct neighbour *n; | |
e4f67add DS |
1510 | |
1511 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1512 | return false; | |
1513 | ||
1514 | n = NULL; | |
1515 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1516 | case ETH_P_IP: | |
e15a00aa CW |
1517 | { |
1518 | struct iphdr *pip; | |
1519 | ||
e4f67add DS |
1520 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1521 | return false; | |
1522 | pip = ip_hdr(skb); | |
1523 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1524 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1525 | union vxlan_addr ipa = { | |
1526 | .sin.sin_addr.s_addr = pip->daddr, | |
1527 | .sa.sa_family = AF_INET, | |
1528 | }; | |
1529 | ||
1530 | vxlan_ip_miss(dev, &ipa); | |
1531 | return false; | |
1532 | } | |
1533 | ||
e4f67add | 1534 | break; |
e15a00aa CW |
1535 | } |
1536 | #if IS_ENABLED(CONFIG_IPV6) | |
1537 | case ETH_P_IPV6: | |
1538 | { | |
1539 | struct ipv6hdr *pip6; | |
1540 | ||
1541 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1542 | return false; | |
1543 | pip6 = ipv6_hdr(skb); | |
1544 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1545 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1546 | union vxlan_addr ipa = { | |
1547 | .sin6.sin6_addr = pip6->daddr, | |
1548 | .sa.sa_family = AF_INET6, | |
1549 | }; | |
1550 | ||
1551 | vxlan_ip_miss(dev, &ipa); | |
1552 | return false; | |
1553 | } | |
1554 | ||
1555 | break; | |
1556 | } | |
1557 | #endif | |
e4f67add DS |
1558 | default: |
1559 | return false; | |
1560 | } | |
1561 | ||
1562 | if (n) { | |
1563 | bool diff; | |
1564 | ||
7367d0b5 | 1565 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1566 | if (diff) { |
1567 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1568 | dev->addr_len); | |
1569 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1570 | } | |
1571 | neigh_release(n); | |
1572 | return diff; | |
e4c7ed41 CW |
1573 | } |
1574 | ||
e4f67add DS |
1575 | return false; |
1576 | } | |
1577 | ||
05f47d69 | 1578 | /* Compute source port for outgoing packet |
1579 | * first choice to use L4 flow hash since it will spread | |
1580 | * better and maybe available from hardware | |
1581 | * secondary choice is to use jhash on the Ethernet header | |
1582 | */ | |
49560532 | 1583 | __be16 vxlan_src_port(__u16 port_min, __u16 port_max, struct sk_buff *skb) |
05f47d69 | 1584 | { |
49560532 | 1585 | unsigned int range = (port_max - port_min) + 1; |
05f47d69 | 1586 | u32 hash; |
1587 | ||
3958afa1 | 1588 | hash = skb_get_hash(skb); |
05f47d69 | 1589 | if (!hash) |
1590 | hash = jhash(skb->data, 2 * ETH_ALEN, | |
1591 | (__force u32) skb->protocol); | |
1592 | ||
49560532 | 1593 | return htons((((u64) hash * range) >> 32) + port_min); |
05f47d69 | 1594 | } |
49560532 | 1595 | EXPORT_SYMBOL_GPL(vxlan_src_port); |
05f47d69 | 1596 | |
359a0ea9 TH |
1597 | static inline struct sk_buff *vxlan_handle_offloads(struct sk_buff *skb, |
1598 | bool udp_csum) | |
05c0db08 | 1599 | { |
359a0ea9 TH |
1600 | int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1601 | return iptunnel_handle_offloads(skb, udp_csum, type); | |
05c0db08 PS |
1602 | } |
1603 | ||
e4c7ed41 | 1604 | #if IS_ENABLED(CONFIG_IPV6) |
11796187 | 1605 | static int vxlan6_xmit_skb(struct vxlan_sock *vs, |
e4c7ed41 CW |
1606 | struct dst_entry *dst, struct sk_buff *skb, |
1607 | struct net_device *dev, struct in6_addr *saddr, | |
1608 | struct in6_addr *daddr, __u8 prio, __u8 ttl, | |
f01ec1c0 ND |
1609 | __be16 src_port, __be16 dst_port, __be32 vni, |
1610 | bool xnet) | |
e4c7ed41 CW |
1611 | { |
1612 | struct ipv6hdr *ip6h; | |
1613 | struct vxlanhdr *vxh; | |
1614 | struct udphdr *uh; | |
1615 | int min_headroom; | |
1616 | int err; | |
1617 | ||
359a0ea9 TH |
1618 | skb = vxlan_handle_offloads(skb, !udp_get_no_check6_tx(vs->sock->sk)); |
1619 | if (IS_ERR(skb)) | |
1620 | return -EINVAL; | |
e4c7ed41 | 1621 | |
f01ec1c0 | 1622 | skb_scrub_packet(skb, xnet); |
963a88b3 | 1623 | |
e4c7ed41 CW |
1624 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
1625 | + VXLAN_HLEN + sizeof(struct ipv6hdr) | |
1626 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
1627 | ||
1628 | /* Need space for new headers (invalidates iph ptr) */ | |
1629 | err = skb_cow_head(skb, min_headroom); | |
1630 | if (unlikely(err)) | |
1631 | return err; | |
1632 | ||
1633 | if (vlan_tx_tag_present(skb)) { | |
1634 | if (WARN_ON(!__vlan_put_tag(skb, | |
1635 | skb->vlan_proto, | |
1636 | vlan_tx_tag_get(skb)))) | |
1637 | return -ENOMEM; | |
1638 | ||
1639 | skb->vlan_tci = 0; | |
1640 | } | |
1641 | ||
1642 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); | |
1643 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1644 | vxh->vx_vni = vni; | |
1645 | ||
1646 | __skb_push(skb, sizeof(*uh)); | |
1647 | skb_reset_transport_header(skb); | |
1648 | uh = udp_hdr(skb); | |
1649 | ||
1650 | uh->dest = dst_port; | |
1651 | uh->source = src_port; | |
1652 | ||
1653 | uh->len = htons(skb->len); | |
e4c7ed41 CW |
1654 | |
1655 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); | |
1656 | IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | | |
1657 | IPSKB_REROUTED); | |
e4c7ed41 CW |
1658 | skb_dst_set(skb, dst); |
1659 | ||
359a0ea9 TH |
1660 | udp6_set_csum(udp_get_no_check6_tx(vs->sock->sk), skb, |
1661 | saddr, daddr, skb->len); | |
e4c7ed41 CW |
1662 | |
1663 | __skb_push(skb, sizeof(*ip6h)); | |
1664 | skb_reset_network_header(skb); | |
1665 | ip6h = ipv6_hdr(skb); | |
1666 | ip6h->version = 6; | |
1667 | ip6h->priority = prio; | |
1668 | ip6h->flow_lbl[0] = 0; | |
1669 | ip6h->flow_lbl[1] = 0; | |
1670 | ip6h->flow_lbl[2] = 0; | |
1671 | ip6h->payload_len = htons(skb->len); | |
1672 | ip6h->nexthdr = IPPROTO_UDP; | |
1673 | ip6h->hop_limit = ttl; | |
1674 | ip6h->daddr = *daddr; | |
1675 | ip6h->saddr = *saddr; | |
1676 | ||
e4c7ed41 CW |
1677 | ip6tunnel_xmit(skb, dev); |
1678 | return 0; | |
1679 | } | |
1680 | #endif | |
1681 | ||
11796187 | 1682 | int vxlan_xmit_skb(struct vxlan_sock *vs, |
49560532 PS |
1683 | struct rtable *rt, struct sk_buff *skb, |
1684 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, | |
f01ec1c0 | 1685 | __be16 src_port, __be16 dst_port, __be32 vni, bool xnet) |
49560532 PS |
1686 | { |
1687 | struct vxlanhdr *vxh; | |
1688 | struct udphdr *uh; | |
649c5b8b | 1689 | int min_headroom; |
49560532 PS |
1690 | int err; |
1691 | ||
359a0ea9 TH |
1692 | skb = vxlan_handle_offloads(skb, !vs->sock->sk->sk_no_check_tx); |
1693 | if (IS_ERR(skb)) | |
1694 | return -EINVAL; | |
49560532 | 1695 | |
649c5b8b | 1696 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 PS |
1697 | + VXLAN_HLEN + sizeof(struct iphdr) |
1698 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
649c5b8b PS |
1699 | |
1700 | /* Need space for new headers (invalidates iph ptr) */ | |
1701 | err = skb_cow_head(skb, min_headroom); | |
1702 | if (unlikely(err)) | |
1703 | return err; | |
1704 | ||
1eaa8178 PS |
1705 | if (vlan_tx_tag_present(skb)) { |
1706 | if (WARN_ON(!__vlan_put_tag(skb, | |
1707 | skb->vlan_proto, | |
1708 | vlan_tx_tag_get(skb)))) | |
1709 | return -ENOMEM; | |
1710 | ||
1711 | skb->vlan_tci = 0; | |
1712 | } | |
1713 | ||
49560532 PS |
1714 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
1715 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1716 | vxh->vx_vni = vni; | |
1717 | ||
1718 | __skb_push(skb, sizeof(*uh)); | |
1719 | skb_reset_transport_header(skb); | |
1720 | uh = udp_hdr(skb); | |
1721 | ||
1722 | uh->dest = dst_port; | |
1723 | uh->source = src_port; | |
1724 | ||
1725 | uh->len = htons(skb->len); | |
49560532 | 1726 | |
359a0ea9 TH |
1727 | udp_set_csum(vs->sock->sk->sk_no_check_tx, skb, |
1728 | src, dst, skb->len); | |
49560532 | 1729 | |
aad88724 | 1730 | return iptunnel_xmit(vs->sock->sk, rt, skb, src, dst, IPPROTO_UDP, |
f01ec1c0 | 1731 | tos, ttl, df, xnet); |
49560532 PS |
1732 | } |
1733 | EXPORT_SYMBOL_GPL(vxlan_xmit_skb); | |
1734 | ||
9dcc71e1 SS |
1735 | /* Bypass encapsulation if the destination is local */ |
1736 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1737 | struct vxlan_dev *dst_vxlan) | |
1738 | { | |
8f84985f | 1739 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1740 | union vxlan_addr loopback; |
1741 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
9dcc71e1 | 1742 | |
8f84985f LR |
1743 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1744 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1745 | skb->pkt_type = PACKET_HOST; |
1746 | skb->encapsulation = 0; | |
1747 | skb->dev = dst_vxlan->dev; | |
1748 | __skb_pull(skb, skb_network_offset(skb)); | |
1749 | ||
e4c7ed41 CW |
1750 | if (remote_ip->sa.sa_family == AF_INET) { |
1751 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1752 | loopback.sa.sa_family = AF_INET; | |
1753 | #if IS_ENABLED(CONFIG_IPV6) | |
1754 | } else { | |
1755 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1756 | loopback.sa.sa_family = AF_INET6; | |
1757 | #endif | |
1758 | } | |
1759 | ||
9dcc71e1 | 1760 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1761 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1762 | |
1763 | u64_stats_update_begin(&tx_stats->syncp); | |
1764 | tx_stats->tx_packets++; | |
1765 | tx_stats->tx_bytes += skb->len; | |
1766 | u64_stats_update_end(&tx_stats->syncp); | |
1767 | ||
1768 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1769 | u64_stats_update_begin(&rx_stats->syncp); | |
1770 | rx_stats->rx_packets++; | |
1771 | rx_stats->rx_bytes += skb->len; | |
1772 | u64_stats_update_end(&rx_stats->syncp); | |
1773 | } else { | |
1774 | skb->dev->stats.rx_dropped++; | |
1775 | } | |
1776 | } | |
1777 | ||
4ad16930 SH |
1778 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1779 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1780 | { |
1781 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
e4c7ed41 | 1782 | struct rtable *rt = NULL; |
d342894c | 1783 | const struct iphdr *old_iph; |
d342894c | 1784 | struct flowi4 fl4; |
e4c7ed41 CW |
1785 | union vxlan_addr *dst; |
1786 | __be16 src_port = 0, dst_port; | |
234f5b73 | 1787 | u32 vni; |
d342894c | 1788 | __be16 df = 0; |
1789 | __u8 tos, ttl; | |
0e6fbc5b | 1790 | int err; |
d342894c | 1791 | |
823aa873 | 1792 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; |
6681712d | 1793 | vni = rdst->remote_vni; |
e4c7ed41 | 1794 | dst = &rdst->remote_ip; |
e4f67add | 1795 | |
e4c7ed41 | 1796 | if (vxlan_addr_any(dst)) { |
e4f67add | 1797 | if (did_rsc) { |
e4f67add | 1798 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1799 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1800 | return; |
e4f67add | 1801 | } |
ef59febe | 1802 | goto drop; |
e4f67add | 1803 | } |
ef59febe | 1804 | |
d342894c | 1805 | old_iph = ip_hdr(skb); |
1806 | ||
d342894c | 1807 | ttl = vxlan->ttl; |
e4c7ed41 | 1808 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1809 | ttl = 1; |
1810 | ||
1811 | tos = vxlan->tos; | |
1812 | if (tos == 1) | |
206aaafc | 1813 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1814 | |
49560532 | 1815 | src_port = vxlan_src_port(vxlan->port_min, vxlan->port_max, skb); |
d342894c | 1816 | |
e4c7ed41 CW |
1817 | if (dst->sa.sa_family == AF_INET) { |
1818 | memset(&fl4, 0, sizeof(fl4)); | |
1819 | fl4.flowi4_oif = rdst->remote_ifindex; | |
1820 | fl4.flowi4_tos = RT_TOS(tos); | |
1821 | fl4.daddr = dst->sin.sin_addr.s_addr; | |
1822 | fl4.saddr = vxlan->saddr.sin.sin_addr.s_addr; | |
1823 | ||
f01ec1c0 | 1824 | rt = ip_route_output_key(vxlan->net, &fl4); |
e4c7ed41 CW |
1825 | if (IS_ERR(rt)) { |
1826 | netdev_dbg(dev, "no route to %pI4\n", | |
1827 | &dst->sin.sin_addr.s_addr); | |
1828 | dev->stats.tx_carrier_errors++; | |
1829 | goto tx_error; | |
1830 | } | |
d342894c | 1831 | |
e4c7ed41 CW |
1832 | if (rt->dst.dev == dev) { |
1833 | netdev_dbg(dev, "circular route to %pI4\n", | |
1834 | &dst->sin.sin_addr.s_addr); | |
1835 | dev->stats.collisions++; | |
fffc15a5 | 1836 | goto rt_tx_error; |
e4c7ed41 CW |
1837 | } |
1838 | ||
1839 | /* Bypass encapsulation if the destination is local */ | |
1840 | if (rt->rt_flags & RTCF_LOCAL && | |
1841 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1842 | struct vxlan_dev *dst_vxlan; | |
1843 | ||
1844 | ip_rt_put(rt); | |
f01ec1c0 | 1845 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, dst_port); |
e4c7ed41 CW |
1846 | if (!dst_vxlan) |
1847 | goto tx_error; | |
1848 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1849 | return; | |
1850 | } | |
1851 | ||
1852 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); | |
1853 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
d342894c | 1854 | |
11796187 | 1855 | err = vxlan_xmit_skb(vxlan->vn_sock, rt, skb, |
e4c7ed41 CW |
1856 | fl4.saddr, dst->sin.sin_addr.s_addr, |
1857 | tos, ttl, df, src_port, dst_port, | |
f01ec1c0 ND |
1858 | htonl(vni << 8), |
1859 | !net_eq(vxlan->net, dev_net(vxlan->dev))); | |
9dcc71e1 | 1860 | |
e4c7ed41 CW |
1861 | if (err < 0) |
1862 | goto rt_tx_error; | |
1863 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
1864 | #if IS_ENABLED(CONFIG_IPV6) | |
1865 | } else { | |
1866 | struct sock *sk = vxlan->vn_sock->sock->sk; | |
1867 | struct dst_entry *ndst; | |
1868 | struct flowi6 fl6; | |
1869 | u32 flags; | |
1870 | ||
1871 | memset(&fl6, 0, sizeof(fl6)); | |
1872 | fl6.flowi6_oif = rdst->remote_ifindex; | |
1873 | fl6.daddr = dst->sin6.sin6_addr; | |
1874 | fl6.saddr = vxlan->saddr.sin6.sin6_addr; | |
8c1bb79f | 1875 | fl6.flowi6_proto = IPPROTO_UDP; |
e4c7ed41 CW |
1876 | |
1877 | if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) { | |
1878 | netdev_dbg(dev, "no route to %pI6\n", | |
1879 | &dst->sin6.sin6_addr); | |
1880 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 1881 | goto tx_error; |
e4c7ed41 | 1882 | } |
d342894c | 1883 | |
e4c7ed41 CW |
1884 | if (ndst->dev == dev) { |
1885 | netdev_dbg(dev, "circular route to %pI6\n", | |
1886 | &dst->sin6.sin6_addr); | |
1887 | dst_release(ndst); | |
1888 | dev->stats.collisions++; | |
1889 | goto tx_error; | |
1890 | } | |
0e6fbc5b | 1891 | |
e4c7ed41 CW |
1892 | /* Bypass encapsulation if the destination is local */ |
1893 | flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
1894 | if (flags & RTF_LOCAL && | |
1895 | !(flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1896 | struct vxlan_dev *dst_vxlan; | |
1897 | ||
1898 | dst_release(ndst); | |
f01ec1c0 | 1899 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, dst_port); |
e4c7ed41 CW |
1900 | if (!dst_vxlan) |
1901 | goto tx_error; | |
1902 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1903 | return; | |
1904 | } | |
49560532 | 1905 | |
e4c7ed41 CW |
1906 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
1907 | ||
11796187 | 1908 | err = vxlan6_xmit_skb(vxlan->vn_sock, ndst, skb, |
e4c7ed41 | 1909 | dev, &fl6.saddr, &fl6.daddr, 0, ttl, |
f01ec1c0 ND |
1910 | src_port, dst_port, htonl(vni << 8), |
1911 | !net_eq(vxlan->net, dev_net(vxlan->dev))); | |
e4c7ed41 CW |
1912 | #endif |
1913 | } | |
0e6fbc5b | 1914 | |
4ad16930 | 1915 | return; |
d342894c | 1916 | |
1917 | drop: | |
1918 | dev->stats.tx_dropped++; | |
1919 | goto tx_free; | |
1920 | ||
49560532 PS |
1921 | rt_tx_error: |
1922 | ip_rt_put(rt); | |
d342894c | 1923 | tx_error: |
1924 | dev->stats.tx_errors++; | |
1925 | tx_free: | |
1926 | dev_kfree_skb(skb); | |
d342894c | 1927 | } |
1928 | ||
6681712d DS |
1929 | /* Transmit local packets over Vxlan |
1930 | * | |
1931 | * Outer IP header inherits ECN and DF from inner header. | |
1932 | * Outer UDP destination is the VXLAN assigned port. | |
1933 | * source port is based on hash of flow | |
1934 | */ | |
1935 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
1936 | { | |
1937 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1938 | struct ethhdr *eth; | |
1939 | bool did_rsc = false; | |
8f646c92 | 1940 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 1941 | struct vxlan_fdb *f; |
6681712d DS |
1942 | |
1943 | skb_reset_mac_header(skb); | |
1944 | eth = eth_hdr(skb); | |
1945 | ||
f564f45c CW |
1946 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
1947 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
1948 | return arp_reduce(dev, skb); | |
1949 | #if IS_ENABLED(CONFIG_IPV6) | |
1950 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
1951 | skb->len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) && | |
1952 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { | |
1953 | struct nd_msg *msg; | |
1954 | ||
1955 | msg = (struct nd_msg *)skb_transport_header(skb); | |
1956 | if (msg->icmph.icmp6_code == 0 && | |
1957 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
1958 | return neigh_reduce(dev, skb); | |
1959 | } | |
1960 | #endif | |
1961 | } | |
6681712d DS |
1962 | |
1963 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
ae884082 DS |
1964 | did_rsc = false; |
1965 | ||
1966 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
1967 | (ntohs(eth->h_proto) == ETH_P_IP || |
1968 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
1969 | did_rsc = route_shortcircuit(dev, skb); |
1970 | if (did_rsc) | |
1971 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
1972 | } | |
1973 | ||
6681712d | 1974 | if (f == NULL) { |
afbd8bae MR |
1975 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
1976 | if (f == NULL) { | |
1977 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
1978 | !is_multicast_ether_addr(eth->h_dest)) | |
1979 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
1980 | ||
1981 | dev->stats.tx_dropped++; | |
8f646c92 | 1982 | kfree_skb(skb); |
afbd8bae MR |
1983 | return NETDEV_TX_OK; |
1984 | } | |
1985 | } | |
6681712d | 1986 | |
afbd8bae MR |
1987 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
1988 | struct sk_buff *skb1; | |
6681712d | 1989 | |
8f646c92 ED |
1990 | if (!fdst) { |
1991 | fdst = rdst; | |
1992 | continue; | |
1993 | } | |
afbd8bae MR |
1994 | skb1 = skb_clone(skb, GFP_ATOMIC); |
1995 | if (skb1) | |
1996 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
1997 | } |
1998 | ||
8f646c92 ED |
1999 | if (fdst) |
2000 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
2001 | else | |
2002 | kfree_skb(skb); | |
4ad16930 | 2003 | return NETDEV_TX_OK; |
6681712d DS |
2004 | } |
2005 | ||
d342894c | 2006 | /* Walk the forwarding table and purge stale entries */ |
2007 | static void vxlan_cleanup(unsigned long arg) | |
2008 | { | |
2009 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2010 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2011 | unsigned int h; | |
2012 | ||
2013 | if (!netif_running(vxlan->dev)) | |
2014 | return; | |
2015 | ||
2016 | spin_lock_bh(&vxlan->hash_lock); | |
2017 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2018 | struct hlist_node *p, *n; | |
2019 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2020 | struct vxlan_fdb *f | |
2021 | = container_of(p, struct vxlan_fdb, hlist); | |
2022 | unsigned long timeout; | |
2023 | ||
3c172868 | 2024 | if (f->state & NUD_PERMANENT) |
d342894c | 2025 | continue; |
2026 | ||
2027 | timeout = f->used + vxlan->age_interval * HZ; | |
2028 | if (time_before_eq(timeout, jiffies)) { | |
2029 | netdev_dbg(vxlan->dev, | |
2030 | "garbage collect %pM\n", | |
2031 | f->eth_addr); | |
2032 | f->state = NUD_STALE; | |
2033 | vxlan_fdb_destroy(vxlan, f); | |
2034 | } else if (time_before(timeout, next_timer)) | |
2035 | next_timer = timeout; | |
2036 | } | |
2037 | } | |
2038 | spin_unlock_bh(&vxlan->hash_lock); | |
2039 | ||
2040 | mod_timer(&vxlan->age_timer, next_timer); | |
2041 | } | |
2042 | ||
9c2e24e1 PS |
2043 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2044 | { | |
2045 | __u32 vni = vxlan->default_dst.remote_vni; | |
2046 | ||
2047 | vxlan->vn_sock = vs; | |
2048 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); | |
2049 | } | |
2050 | ||
d342894c | 2051 | /* Setup stats when device is created */ |
2052 | static int vxlan_init(struct net_device *dev) | |
2053 | { | |
1c51a915 | 2054 | struct vxlan_dev *vxlan = netdev_priv(dev); |
f01ec1c0 | 2055 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2056 | struct vxlan_sock *vs; |
1c51a915 | 2057 | |
1c213bd2 | 2058 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2059 | if (!dev->tstats) |
d342894c | 2060 | return -ENOMEM; |
2061 | ||
1c51a915 | 2062 | spin_lock(&vn->sock_lock); |
f01ec1c0 | 2063 | vs = vxlan_find_sock(vxlan->net, vxlan->dst_port); |
1c51a915 SH |
2064 | if (vs) { |
2065 | /* If we have a socket with same port already, reuse it */ | |
2066 | atomic_inc(&vs->refcnt); | |
9c2e24e1 | 2067 | vxlan_vs_add_dev(vs, vxlan); |
1c51a915 SH |
2068 | } else { |
2069 | /* otherwise make new socket outside of RTNL */ | |
2070 | dev_hold(dev); | |
2071 | queue_work(vxlan_wq, &vxlan->sock_work); | |
2072 | } | |
2073 | spin_unlock(&vn->sock_lock); | |
2074 | ||
d342894c | 2075 | return 0; |
2076 | } | |
2077 | ||
ba609e9b | 2078 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2079 | { |
2080 | struct vxlan_fdb *f; | |
2081 | ||
2082 | spin_lock_bh(&vxlan->hash_lock); | |
2083 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2084 | if (f) | |
2085 | vxlan_fdb_destroy(vxlan, f); | |
2086 | spin_unlock_bh(&vxlan->hash_lock); | |
2087 | } | |
2088 | ||
ebf4063e SH |
2089 | static void vxlan_uninit(struct net_device *dev) |
2090 | { | |
2091 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e SH |
2092 | struct vxlan_sock *vs = vxlan->vn_sock; |
2093 | ||
ba609e9b | 2094 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2095 | |
ebf4063e | 2096 | if (vs) |
012a5729 | 2097 | vxlan_sock_release(vs); |
ebf4063e SH |
2098 | free_percpu(dev->tstats); |
2099 | } | |
2100 | ||
d342894c | 2101 | /* Start ageing timer and join group when device is brought up */ |
2102 | static int vxlan_open(struct net_device *dev) | |
2103 | { | |
2104 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1c51a915 SH |
2105 | struct vxlan_sock *vs = vxlan->vn_sock; |
2106 | ||
2107 | /* socket hasn't been created */ | |
2108 | if (!vs) | |
2109 | return -ENOTCONN; | |
d342894c | 2110 | |
79d4a94f | 2111 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
1c51a915 | 2112 | vxlan_sock_hold(vs); |
7c47cedf | 2113 | dev_hold(dev); |
3fc2de2f | 2114 | queue_work(vxlan_wq, &vxlan->igmp_join); |
d342894c | 2115 | } |
2116 | ||
2117 | if (vxlan->age_interval) | |
2118 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
2119 | ||
2120 | return 0; | |
2121 | } | |
2122 | ||
2123 | /* Purge the forwarding table */ | |
2124 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2125 | { | |
31fec5aa | 2126 | unsigned int h; |
d342894c | 2127 | |
2128 | spin_lock_bh(&vxlan->hash_lock); | |
2129 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2130 | struct hlist_node *p, *n; | |
2131 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2132 | struct vxlan_fdb *f | |
2133 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2134 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2135 | if (!is_zero_ether_addr(f->eth_addr)) | |
2136 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2137 | } |
2138 | } | |
2139 | spin_unlock_bh(&vxlan->hash_lock); | |
2140 | } | |
2141 | ||
2142 | /* Cleanup timer and forwarding table on shutdown */ | |
2143 | static int vxlan_stop(struct net_device *dev) | |
2144 | { | |
2145 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2146 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2147 | struct vxlan_sock *vs = vxlan->vn_sock; |
d342894c | 2148 | |
e4c7ed41 | 2149 | if (vs && vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
95ab0991 | 2150 | !vxlan_group_used(vn, vxlan)) { |
1c51a915 | 2151 | vxlan_sock_hold(vs); |
7c47cedf | 2152 | dev_hold(dev); |
3fc2de2f | 2153 | queue_work(vxlan_wq, &vxlan->igmp_leave); |
7c47cedf | 2154 | } |
d342894c | 2155 | |
2156 | del_timer_sync(&vxlan->age_timer); | |
2157 | ||
2158 | vxlan_flush(vxlan); | |
2159 | ||
2160 | return 0; | |
2161 | } | |
2162 | ||
d342894c | 2163 | /* Stub, nothing needs to be done. */ |
2164 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2165 | { | |
2166 | } | |
2167 | ||
345010b5 DB |
2168 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2169 | { | |
2170 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2171 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2172 | struct net_device *lowerdev; | |
2173 | int max_mtu; | |
2174 | ||
f01ec1c0 | 2175 | lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex); |
345010b5 DB |
2176 | if (lowerdev == NULL) |
2177 | return eth_change_mtu(dev, new_mtu); | |
2178 | ||
2179 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
2180 | max_mtu = lowerdev->mtu - VXLAN6_HEADROOM; | |
2181 | else | |
2182 | max_mtu = lowerdev->mtu - VXLAN_HEADROOM; | |
2183 | ||
2184 | if (new_mtu < 68 || new_mtu > max_mtu) | |
2185 | return -EINVAL; | |
2186 | ||
2187 | dev->mtu = new_mtu; | |
2188 | return 0; | |
2189 | } | |
2190 | ||
d342894c | 2191 | static const struct net_device_ops vxlan_netdev_ops = { |
2192 | .ndo_init = vxlan_init, | |
ebf4063e | 2193 | .ndo_uninit = vxlan_uninit, |
d342894c | 2194 | .ndo_open = vxlan_open, |
2195 | .ndo_stop = vxlan_stop, | |
2196 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2197 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2198 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2199 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2200 | .ndo_validate_addr = eth_validate_addr, |
2201 | .ndo_set_mac_address = eth_mac_addr, | |
2202 | .ndo_fdb_add = vxlan_fdb_add, | |
2203 | .ndo_fdb_del = vxlan_fdb_delete, | |
2204 | .ndo_fdb_dump = vxlan_fdb_dump, | |
2205 | }; | |
2206 | ||
2207 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2208 | static struct device_type vxlan_type = { | |
2209 | .name = "vxlan", | |
2210 | }; | |
2211 | ||
53cf5275 | 2212 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2213 | * supply the listening VXLAN udp ports. Callers are expected |
2214 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2215 | */ |
2216 | void vxlan_get_rx_port(struct net_device *dev) | |
2217 | { | |
2218 | struct vxlan_sock *vs; | |
2219 | struct net *net = dev_net(dev); | |
2220 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2221 | sa_family_t sa_family; | |
35e42379 JG |
2222 | __be16 port; |
2223 | unsigned int i; | |
53cf5275 JG |
2224 | |
2225 | spin_lock(&vn->sock_lock); | |
2226 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2227 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2228 | port = inet_sk(vs->sock->sk)->inet_sport; | |
53cf5275 JG |
2229 | sa_family = vs->sock->sk->sk_family; |
2230 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
2231 | port); | |
2232 | } | |
2233 | } | |
2234 | spin_unlock(&vn->sock_lock); | |
2235 | } | |
2236 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2237 | ||
d342894c | 2238 | /* Initialize the device structure. */ |
2239 | static void vxlan_setup(struct net_device *dev) | |
2240 | { | |
2241 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2242 | unsigned int h; |
05f47d69 | 2243 | int low, high; |
d342894c | 2244 | |
2245 | eth_hw_addr_random(dev); | |
2246 | ether_setup(dev); | |
e4c7ed41 CW |
2247 | if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6) |
2248 | dev->hard_header_len = ETH_HLEN + VXLAN6_HEADROOM; | |
2249 | else | |
2250 | dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM; | |
d342894c | 2251 | |
2252 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 2253 | dev->destructor = free_netdev; |
d342894c | 2254 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2255 | ||
2256 | dev->tx_queue_len = 0; | |
2257 | dev->features |= NETIF_F_LLTX; | |
d6727fe3 | 2258 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2259 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2260 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2261 | |
1eaa8178 PS |
2262 | dev->vlan_features = dev->features; |
2263 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2264 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2265 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2266 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
d342894c | 2267 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
6602d007 | 2268 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 2269 | |
553675fb | 2270 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2271 | spin_lock_init(&vxlan->hash_lock); |
3fc2de2f | 2272 | INIT_WORK(&vxlan->igmp_join, vxlan_igmp_join); |
2273 | INIT_WORK(&vxlan->igmp_leave, vxlan_igmp_leave); | |
1c51a915 | 2274 | INIT_WORK(&vxlan->sock_work, vxlan_sock_work); |
d342894c | 2275 | |
2276 | init_timer_deferrable(&vxlan->age_timer); | |
2277 | vxlan->age_timer.function = vxlan_cleanup; | |
2278 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2279 | ||
0bbf87d8 | 2280 | inet_get_local_port_range(dev_net(dev), &low, &high); |
05f47d69 | 2281 | vxlan->port_min = low; |
2282 | vxlan->port_max = high; | |
823aa873 | 2283 | vxlan->dst_port = htons(vxlan_port); |
05f47d69 | 2284 | |
d342894c | 2285 | vxlan->dev = dev; |
2286 | ||
2287 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
2288 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2289 | } | |
2290 | ||
2291 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
2292 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2293 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2294 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2295 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2296 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2297 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2298 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2299 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
2300 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
2301 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2302 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2303 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2304 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2305 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2306 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2307 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
823aa873 | 2308 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
d342894c | 2309 | }; |
2310 | ||
2311 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2312 | { | |
2313 | if (tb[IFLA_ADDRESS]) { | |
2314 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2315 | pr_debug("invalid link address (not ethernet)\n"); | |
2316 | return -EINVAL; | |
2317 | } | |
2318 | ||
2319 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2320 | pr_debug("invalid all zero ethernet address\n"); | |
2321 | return -EADDRNOTAVAIL; | |
2322 | } | |
2323 | } | |
2324 | ||
2325 | if (!data) | |
2326 | return -EINVAL; | |
2327 | ||
2328 | if (data[IFLA_VXLAN_ID]) { | |
2329 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2330 | if (id >= VXLAN_VID_MASK) | |
2331 | return -ERANGE; | |
2332 | } | |
2333 | ||
05f47d69 | 2334 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2335 | const struct ifla_vxlan_port_range *p | |
2336 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2337 | ||
2338 | if (ntohs(p->high) < ntohs(p->low)) { | |
2339 | pr_debug("port range %u .. %u not valid\n", | |
2340 | ntohs(p->low), ntohs(p->high)); | |
2341 | return -EINVAL; | |
2342 | } | |
2343 | } | |
2344 | ||
d342894c | 2345 | return 0; |
2346 | } | |
2347 | ||
1b13c97f YB |
2348 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2349 | struct ethtool_drvinfo *drvinfo) | |
2350 | { | |
2351 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2352 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2353 | } | |
2354 | ||
2355 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2356 | .get_drvinfo = vxlan_get_drvinfo, | |
2357 | .get_link = ethtool_op_get_link, | |
2358 | }; | |
2359 | ||
553675fb | 2360 | static void vxlan_del_work(struct work_struct *work) |
2361 | { | |
2362 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
2363 | ||
2364 | sk_release_kernel(vs->sock->sk); | |
2365 | kfree_rcu(vs, rcu); | |
2366 | } | |
2367 | ||
e4c7ed41 CW |
2368 | #if IS_ENABLED(CONFIG_IPV6) |
2369 | /* Create UDP socket for encapsulation receive. AF_INET6 socket | |
2370 | * could be used for both IPv4 and IPv6 communications, but | |
2371 | * users may set bindv6only=1. | |
2372 | */ | |
359a0ea9 | 2373 | static struct socket *create_v6_sock(struct net *net, __be16 port, u32 flags) |
553675fb | 2374 | { |
553675fb | 2375 | struct sock *sk; |
e4c7ed41 CW |
2376 | struct socket *sock; |
2377 | struct sockaddr_in6 vxlan_addr = { | |
2378 | .sin6_family = AF_INET6, | |
2379 | .sin6_port = port, | |
2380 | }; | |
2381 | int rc, val = 1; | |
2382 | ||
2383 | rc = sock_create_kern(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock); | |
2384 | if (rc < 0) { | |
2385 | pr_debug("UDPv6 socket create failed\n"); | |
39deb2c7 | 2386 | return ERR_PTR(rc); |
e4c7ed41 CW |
2387 | } |
2388 | ||
2389 | /* Put in proper namespace */ | |
2390 | sk = sock->sk; | |
2391 | sk_change_net(sk, net); | |
2392 | ||
2393 | kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY, | |
2394 | (char *)&val, sizeof(val)); | |
2395 | rc = kernel_bind(sock, (struct sockaddr *)&vxlan_addr, | |
2396 | sizeof(struct sockaddr_in6)); | |
2397 | if (rc < 0) { | |
2398 | pr_debug("bind for UDPv6 socket %pI6:%u (%d)\n", | |
2399 | &vxlan_addr.sin6_addr, ntohs(vxlan_addr.sin6_port), rc); | |
2400 | sk_release_kernel(sk); | |
39deb2c7 | 2401 | return ERR_PTR(rc); |
e4c7ed41 CW |
2402 | } |
2403 | /* At this point, IPv6 module should have been loaded in | |
2404 | * sock_create_kern(). | |
2405 | */ | |
2406 | BUG_ON(!ipv6_stub); | |
2407 | ||
e4c7ed41 CW |
2408 | /* Disable multicast loopback */ |
2409 | inet_sk(sk)->mc_loop = 0; | |
359a0ea9 TH |
2410 | |
2411 | if (flags & VXLAN_F_UDP_ZERO_CSUM6_TX) | |
2412 | udp_set_no_check6_tx(sk, true); | |
2413 | ||
2414 | if (flags & VXLAN_F_UDP_ZERO_CSUM6_RX) | |
2415 | udp_set_no_check6_rx(sk, true); | |
2416 | ||
39deb2c7 | 2417 | return sock; |
e4c7ed41 CW |
2418 | } |
2419 | ||
2420 | #else | |
2421 | ||
359a0ea9 | 2422 | static struct socket *create_v6_sock(struct net *net, __be16 port, u32 flags) |
e4c7ed41 | 2423 | { |
39deb2c7 | 2424 | return ERR_PTR(-EPFNOSUPPORT); |
e4c7ed41 CW |
2425 | } |
2426 | #endif | |
2427 | ||
359a0ea9 | 2428 | static struct socket *create_v4_sock(struct net *net, __be16 port, u32 flags) |
e4c7ed41 CW |
2429 | { |
2430 | struct sock *sk; | |
2431 | struct socket *sock; | |
553675fb | 2432 | struct sockaddr_in vxlan_addr = { |
2433 | .sin_family = AF_INET, | |
2434 | .sin_addr.s_addr = htonl(INADDR_ANY), | |
bb3fd687 | 2435 | .sin_port = port, |
553675fb | 2436 | }; |
2437 | int rc; | |
553675fb | 2438 | |
2439 | /* Create UDP socket for encapsulation receive. */ | |
e4c7ed41 | 2440 | rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock); |
553675fb | 2441 | if (rc < 0) { |
2442 | pr_debug("UDP socket create failed\n"); | |
39deb2c7 | 2443 | return ERR_PTR(rc); |
553675fb | 2444 | } |
2445 | ||
2446 | /* Put in proper namespace */ | |
e4c7ed41 | 2447 | sk = sock->sk; |
553675fb | 2448 | sk_change_net(sk, net); |
2449 | ||
e4c7ed41 | 2450 | rc = kernel_bind(sock, (struct sockaddr *) &vxlan_addr, |
553675fb | 2451 | sizeof(vxlan_addr)); |
2452 | if (rc < 0) { | |
2453 | pr_debug("bind for UDP socket %pI4:%u (%d)\n", | |
2454 | &vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc); | |
2455 | sk_release_kernel(sk); | |
39deb2c7 | 2456 | return ERR_PTR(rc); |
e4c7ed41 CW |
2457 | } |
2458 | ||
e4c7ed41 CW |
2459 | /* Disable multicast loopback */ |
2460 | inet_sk(sk)->mc_loop = 0; | |
359a0ea9 TH |
2461 | |
2462 | if (!(flags & VXLAN_F_UDP_CSUM)) | |
2463 | sock->sk->sk_no_check_tx = 1; | |
2464 | ||
39deb2c7 | 2465 | return sock; |
e4c7ed41 CW |
2466 | } |
2467 | ||
2468 | /* Create new listen socket if needed */ | |
2469 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, | |
359a0ea9 TH |
2470 | vxlan_rcv_t *rcv, void *data, |
2471 | u32 flags) | |
e4c7ed41 CW |
2472 | { |
2473 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2474 | struct vxlan_sock *vs; | |
2475 | struct socket *sock; | |
2476 | struct sock *sk; | |
e4c7ed41 | 2477 | unsigned int h; |
359a0ea9 | 2478 | bool ipv6 = !!(flags & VXLAN_F_IPV6); |
e4c7ed41 | 2479 | |
dc01e7d3 | 2480 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2481 | if (!vs) |
2482 | return ERR_PTR(-ENOMEM); | |
2483 | ||
2484 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2485 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2486 | ||
2487 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2488 | ||
2489 | if (ipv6) | |
359a0ea9 | 2490 | sock = create_v6_sock(net, port, flags); |
e4c7ed41 | 2491 | else |
359a0ea9 | 2492 | sock = create_v4_sock(net, port, flags); |
39deb2c7 | 2493 | if (IS_ERR(sock)) { |
553675fb | 2494 | kfree(vs); |
e50fddc8 | 2495 | return ERR_CAST(sock); |
553675fb | 2496 | } |
e4c7ed41 CW |
2497 | |
2498 | vs->sock = sock; | |
2499 | sk = sock->sk; | |
9c2e24e1 | 2500 | atomic_set(&vs->refcnt, 1); |
5cfccc5a | 2501 | vs->rcv = rcv; |
012a5729 | 2502 | vs->data = data; |
559835ea | 2503 | rcu_assign_sk_user_data(vs->sock->sk, vs); |
553675fb | 2504 | |
dc01e7d3 OG |
2505 | /* Initialize the vxlan udp offloads structure */ |
2506 | vs->udp_offloads.port = port; | |
2507 | vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive; | |
2508 | vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete; | |
2509 | ||
9c2e24e1 PS |
2510 | spin_lock(&vn->sock_lock); |
2511 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2512 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2513 | spin_unlock(&vn->sock_lock); |
553675fb | 2514 | |
2515 | /* Mark socket as an encapsulation socket. */ | |
2516 | udp_sk(sk)->encap_type = 1; | |
2517 | udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; | |
e4c7ed41 CW |
2518 | #if IS_ENABLED(CONFIG_IPV6) |
2519 | if (ipv6) | |
2520 | ipv6_stub->udpv6_encap_enable(); | |
2521 | else | |
2522 | #endif | |
2523 | udp_encap_enable(); | |
2524 | ||
9c2e24e1 PS |
2525 | return vs; |
2526 | } | |
2527 | ||
012a5729 PS |
2528 | struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
2529 | vxlan_rcv_t *rcv, void *data, | |
359a0ea9 | 2530 | bool no_share, u32 flags) |
9c2e24e1 PS |
2531 | { |
2532 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2533 | struct vxlan_sock *vs; | |
2534 | ||
359a0ea9 | 2535 | vs = vxlan_socket_create(net, port, rcv, data, flags); |
9c2e24e1 PS |
2536 | if (!IS_ERR(vs)) |
2537 | return vs; | |
553675fb | 2538 | |
012a5729 PS |
2539 | if (no_share) /* Return error if sharing is not allowed. */ |
2540 | return vs; | |
2541 | ||
9c2e24e1 PS |
2542 | spin_lock(&vn->sock_lock); |
2543 | vs = vxlan_find_sock(net, port); | |
5cfccc5a PS |
2544 | if (vs) { |
2545 | if (vs->rcv == rcv) | |
2546 | atomic_inc(&vs->refcnt); | |
2547 | else | |
2548 | vs = ERR_PTR(-EBUSY); | |
2549 | } | |
2550 | spin_unlock(&vn->sock_lock); | |
2551 | ||
2552 | if (!vs) | |
9c2e24e1 PS |
2553 | vs = ERR_PTR(-EINVAL); |
2554 | ||
553675fb | 2555 | return vs; |
2556 | } | |
012a5729 | 2557 | EXPORT_SYMBOL_GPL(vxlan_sock_add); |
553675fb | 2558 | |
1c51a915 SH |
2559 | /* Scheduled at device creation to bind to a socket */ |
2560 | static void vxlan_sock_work(struct work_struct *work) | |
2561 | { | |
9c2e24e1 | 2562 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, sock_work); |
f01ec1c0 | 2563 | struct net *net = vxlan->net; |
1c51a915 | 2564 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
9c2e24e1 PS |
2565 | __be16 port = vxlan->dst_port; |
2566 | struct vxlan_sock *nvs; | |
1c51a915 | 2567 | |
359a0ea9 | 2568 | nvs = vxlan_sock_add(net, port, vxlan_rcv, NULL, false, vxlan->flags); |
1c51a915 | 2569 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2570 | if (!IS_ERR(nvs)) |
2571 | vxlan_vs_add_dev(nvs, vxlan); | |
2572 | spin_unlock(&vn->sock_lock); | |
2573 | ||
2574 | dev_put(vxlan->dev); | |
1c51a915 SH |
2575 | } |
2576 | ||
d342894c | 2577 | static int vxlan_newlink(struct net *net, struct net_device *dev, |
2578 | struct nlattr *tb[], struct nlattr *data[]) | |
2579 | { | |
553675fb | 2580 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
d342894c | 2581 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 2582 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 2583 | __u32 vni; |
2584 | int err; | |
e4c7ed41 | 2585 | bool use_ipv6 = false; |
d342894c | 2586 | |
2587 | if (!data[IFLA_VXLAN_ID]) | |
2588 | return -EINVAL; | |
2589 | ||
f01ec1c0 ND |
2590 | vxlan->net = dev_net(dev); |
2591 | ||
d342894c | 2592 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); |
c7995c43 | 2593 | dst->remote_vni = vni; |
d342894c | 2594 | |
5933a7bb MR |
2595 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2596 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 CW |
2597 | if (data[IFLA_VXLAN_GROUP]) { |
2598 | dst->remote_ip.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
e4c7ed41 CW |
2599 | } else if (data[IFLA_VXLAN_GROUP6]) { |
2600 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2601 | return -EPFNOSUPPORT; | |
2602 | ||
2603 | nla_memcpy(&dst->remote_ip.sin6.sin6_addr, data[IFLA_VXLAN_GROUP6], | |
2604 | sizeof(struct in6_addr)); | |
2605 | dst->remote_ip.sa.sa_family = AF_INET6; | |
2606 | use_ipv6 = true; | |
2607 | } | |
d342894c | 2608 | |
e4c7ed41 CW |
2609 | if (data[IFLA_VXLAN_LOCAL]) { |
2610 | vxlan->saddr.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
2611 | vxlan->saddr.sa.sa_family = AF_INET; | |
2612 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2613 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2614 | return -EPFNOSUPPORT; | |
2615 | ||
2616 | /* TODO: respect scope id */ | |
2617 | nla_memcpy(&vxlan->saddr.sin6.sin6_addr, data[IFLA_VXLAN_LOCAL6], | |
2618 | sizeof(struct in6_addr)); | |
2619 | vxlan->saddr.sa.sa_family = AF_INET6; | |
2620 | use_ipv6 = true; | |
2621 | } | |
d342894c | 2622 | |
34e02aa1 | 2623 | if (data[IFLA_VXLAN_LINK] && |
c7995c43 | 2624 | (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { |
34e02aa1 | 2625 | struct net_device *lowerdev |
c7995c43 | 2626 | = __dev_get_by_index(net, dst->remote_ifindex); |
34e02aa1 | 2627 | |
2628 | if (!lowerdev) { | |
c7995c43 | 2629 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2630 | return -ENODEV; |
2631 | } | |
d342894c | 2632 | |
e4c7ed41 CW |
2633 | #if IS_ENABLED(CONFIG_IPV6) |
2634 | if (use_ipv6) { | |
2635 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2636 | if (idev && idev->cnf.disable_ipv6) { | |
2637 | pr_info("IPv6 is disabled via sysctl\n"); | |
2638 | return -EPERM; | |
2639 | } | |
2640 | vxlan->flags |= VXLAN_F_IPV6; | |
2641 | } | |
2642 | #endif | |
2643 | ||
34e02aa1 | 2644 | if (!tb[IFLA_MTU]) |
e4c7ed41 | 2645 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 AD |
2646 | |
2647 | /* update header length based on lower device */ | |
2648 | dev->hard_header_len = lowerdev->hard_header_len + | |
e4c7ed41 | 2649 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
7bda701e | 2650 | } else if (use_ipv6) |
2651 | vxlan->flags |= VXLAN_F_IPV6; | |
d342894c | 2652 | |
2653 | if (data[IFLA_VXLAN_TOS]) | |
2654 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
2655 | ||
afb97186 VB |
2656 | if (data[IFLA_VXLAN_TTL]) |
2657 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
2658 | ||
d342894c | 2659 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 2660 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 2661 | |
2662 | if (data[IFLA_VXLAN_AGEING]) | |
2663 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
2664 | else | |
2665 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
2666 | ||
e4f67add DS |
2667 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
2668 | vxlan->flags |= VXLAN_F_PROXY; | |
2669 | ||
2670 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
2671 | vxlan->flags |= VXLAN_F_RSC; | |
2672 | ||
2673 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
2674 | vxlan->flags |= VXLAN_F_L2MISS; | |
2675 | ||
2676 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
2677 | vxlan->flags |= VXLAN_F_L3MISS; | |
2678 | ||
d342894c | 2679 | if (data[IFLA_VXLAN_LIMIT]) |
2680 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
2681 | ||
05f47d69 | 2682 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2683 | const struct ifla_vxlan_port_range *p | |
2684 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2685 | vxlan->port_min = ntohs(p->low); | |
2686 | vxlan->port_max = ntohs(p->high); | |
2687 | } | |
2688 | ||
823aa873 | 2689 | if (data[IFLA_VXLAN_PORT]) |
2690 | vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
2691 | ||
359a0ea9 TH |
2692 | if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) |
2693 | vxlan->flags |= VXLAN_F_UDP_CSUM; | |
2694 | ||
2695 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && | |
2696 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
2697 | vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; | |
2698 | ||
2699 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && | |
2700 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
2701 | vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; | |
2702 | ||
553675fb | 2703 | if (vxlan_find_vni(net, vni, vxlan->dst_port)) { |
2704 | pr_info("duplicate VNI %u\n", vni); | |
2705 | return -EEXIST; | |
2706 | } | |
2707 | ||
7ad24ea4 | 2708 | dev->ethtool_ops = &vxlan_ethtool_ops; |
1b13c97f | 2709 | |
2936b6ab SS |
2710 | /* create an fdb entry for a valid default destination */ |
2711 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2712 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2713 | &vxlan->default_dst.remote_ip, | |
2714 | NUD_REACHABLE|NUD_PERMANENT, | |
2715 | NLM_F_EXCL|NLM_F_CREATE, | |
2716 | vxlan->dst_port, | |
2717 | vxlan->default_dst.remote_vni, | |
2718 | vxlan->default_dst.remote_ifindex, | |
2719 | NTF_SELF); | |
2720 | if (err) | |
2721 | return err; | |
2722 | } | |
d342894c | 2723 | |
afbd8bae MR |
2724 | err = register_netdevice(dev); |
2725 | if (err) { | |
ba609e9b | 2726 | vxlan_fdb_delete_default(vxlan); |
afbd8bae MR |
2727 | return err; |
2728 | } | |
2729 | ||
553675fb | 2730 | list_add(&vxlan->next, &vn->vxlan_list); |
553675fb | 2731 | |
2732 | return 0; | |
d342894c | 2733 | } |
2734 | ||
2735 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2736 | { | |
2737 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2738 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 2739 | |
fe5c3561 | 2740 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2741 | if (!hlist_unhashed(&vxlan->hlist)) |
2742 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 2743 | spin_unlock(&vn->sock_lock); |
2744 | ||
553675fb | 2745 | list_del(&vxlan->next); |
d342894c | 2746 | unregister_netdevice_queue(dev, head); |
2747 | } | |
2748 | ||
2749 | static size_t vxlan_get_size(const struct net_device *dev) | |
2750 | { | |
2751 | ||
2752 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 2753 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 2754 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 2755 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 2756 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
2757 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
2758 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
2759 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
2760 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
2761 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
2762 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 2763 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
2764 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 2765 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
2766 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
2767 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
2768 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
2769 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
d342894c | 2770 | 0; |
2771 | } | |
2772 | ||
2773 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
2774 | { | |
2775 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 2776 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 2777 | struct ifla_vxlan_port_range ports = { |
2778 | .low = htons(vxlan->port_min), | |
2779 | .high = htons(vxlan->port_max), | |
2780 | }; | |
d342894c | 2781 | |
c7995c43 | 2782 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 2783 | goto nla_put_failure; |
2784 | ||
e4c7ed41 CW |
2785 | if (!vxlan_addr_any(&dst->remote_ip)) { |
2786 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
2787 | if (nla_put_be32(skb, IFLA_VXLAN_GROUP, | |
2788 | dst->remote_ip.sin.sin_addr.s_addr)) | |
2789 | goto nla_put_failure; | |
2790 | #if IS_ENABLED(CONFIG_IPV6) | |
2791 | } else { | |
2792 | if (nla_put(skb, IFLA_VXLAN_GROUP6, sizeof(struct in6_addr), | |
2793 | &dst->remote_ip.sin6.sin6_addr)) | |
2794 | goto nla_put_failure; | |
2795 | #endif | |
2796 | } | |
2797 | } | |
d342894c | 2798 | |
c7995c43 | 2799 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 2800 | goto nla_put_failure; |
2801 | ||
e4c7ed41 CW |
2802 | if (!vxlan_addr_any(&vxlan->saddr)) { |
2803 | if (vxlan->saddr.sa.sa_family == AF_INET) { | |
2804 | if (nla_put_be32(skb, IFLA_VXLAN_LOCAL, | |
2805 | vxlan->saddr.sin.sin_addr.s_addr)) | |
2806 | goto nla_put_failure; | |
2807 | #if IS_ENABLED(CONFIG_IPV6) | |
2808 | } else { | |
2809 | if (nla_put(skb, IFLA_VXLAN_LOCAL6, sizeof(struct in6_addr), | |
2810 | &vxlan->saddr.sin6.sin6_addr)) | |
2811 | goto nla_put_failure; | |
2812 | #endif | |
2813 | } | |
2814 | } | |
d342894c | 2815 | |
2816 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
2817 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
2818 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
2819 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
2820 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
2821 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
2822 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
2823 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
2824 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
2825 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
2826 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 2827 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
823aa873 | 2828 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || |
359a0ea9 TH |
2829 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port) || |
2830 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, | |
2831 | !!(vxlan->flags & VXLAN_F_UDP_CSUM)) || | |
2832 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, | |
2833 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
2834 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
2835 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX))) | |
d342894c | 2836 | goto nla_put_failure; |
2837 | ||
05f47d69 | 2838 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
2839 | goto nla_put_failure; | |
2840 | ||
d342894c | 2841 | return 0; |
2842 | ||
2843 | nla_put_failure: | |
2844 | return -EMSGSIZE; | |
2845 | } | |
2846 | ||
2847 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { | |
2848 | .kind = "vxlan", | |
2849 | .maxtype = IFLA_VXLAN_MAX, | |
2850 | .policy = vxlan_policy, | |
2851 | .priv_size = sizeof(struct vxlan_dev), | |
2852 | .setup = vxlan_setup, | |
2853 | .validate = vxlan_validate, | |
2854 | .newlink = vxlan_newlink, | |
2855 | .dellink = vxlan_dellink, | |
2856 | .get_size = vxlan_get_size, | |
2857 | .fill_info = vxlan_fill_info, | |
2858 | }; | |
2859 | ||
acaf4e70 DB |
2860 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
2861 | struct net_device *dev) | |
2862 | { | |
2863 | struct vxlan_dev *vxlan, *next; | |
2864 | LIST_HEAD(list_kill); | |
2865 | ||
2866 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
2867 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2868 | ||
2869 | /* In case we created vxlan device with carrier | |
2870 | * and we loose the carrier due to module unload | |
2871 | * we also need to remove vxlan device. In other | |
2872 | * cases, it's not necessary and remote_ifindex | |
2873 | * is 0 here, so no matches. | |
2874 | */ | |
2875 | if (dst->remote_ifindex == dev->ifindex) | |
2876 | vxlan_dellink(vxlan->dev, &list_kill); | |
2877 | } | |
2878 | ||
2879 | unregister_netdevice_many(&list_kill); | |
2880 | } | |
2881 | ||
2882 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
2883 | unsigned long event, void *ptr) | |
2884 | { | |
2885 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 2886 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 2887 | |
783c1463 | 2888 | if (event == NETDEV_UNREGISTER) |
acaf4e70 DB |
2889 | vxlan_handle_lowerdev_unregister(vn, dev); |
2890 | ||
2891 | return NOTIFY_DONE; | |
2892 | } | |
2893 | ||
2894 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
2895 | .notifier_call = vxlan_lowerdev_event, | |
2896 | }; | |
2897 | ||
d342894c | 2898 | static __net_init int vxlan_init_net(struct net *net) |
2899 | { | |
2900 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 2901 | unsigned int h; |
d342894c | 2902 | |
553675fb | 2903 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 2904 | spin_lock_init(&vn->sock_lock); |
d342894c | 2905 | |
553675fb | 2906 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
2907 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 2908 | |
2909 | return 0; | |
2910 | } | |
2911 | ||
f01ec1c0 ND |
2912 | static void __net_exit vxlan_exit_net(struct net *net) |
2913 | { | |
2914 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2915 | struct vxlan_dev *vxlan, *next; | |
2916 | struct net_device *dev, *aux; | |
2917 | LIST_HEAD(list); | |
2918 | ||
2919 | rtnl_lock(); | |
2920 | for_each_netdev_safe(net, dev, aux) | |
2921 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
2922 | unregister_netdevice_queue(dev, &list); | |
2923 | ||
2924 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
2925 | /* If vxlan->dev is in the same netns, it has already been added | |
2926 | * to the list by the previous loop. | |
2927 | */ | |
2928 | if (!net_eq(dev_net(vxlan->dev), net)) | |
2929 | unregister_netdevice_queue(dev, &list); | |
2930 | } | |
2931 | ||
2932 | unregister_netdevice_many(&list); | |
2933 | rtnl_unlock(); | |
2934 | } | |
2935 | ||
d342894c | 2936 | static struct pernet_operations vxlan_net_ops = { |
2937 | .init = vxlan_init_net, | |
f01ec1c0 | 2938 | .exit = vxlan_exit_net, |
d342894c | 2939 | .id = &vxlan_net_id, |
2940 | .size = sizeof(struct vxlan_net), | |
2941 | }; | |
2942 | ||
2943 | static int __init vxlan_init_module(void) | |
2944 | { | |
2945 | int rc; | |
2946 | ||
758c57d1 SH |
2947 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
2948 | if (!vxlan_wq) | |
2949 | return -ENOMEM; | |
2950 | ||
d342894c | 2951 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
2952 | ||
783c1463 | 2953 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 2954 | if (rc) |
2955 | goto out1; | |
2956 | ||
acaf4e70 | 2957 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 2958 | if (rc) |
2959 | goto out2; | |
2960 | ||
acaf4e70 DB |
2961 | rc = rtnl_link_register(&vxlan_link_ops); |
2962 | if (rc) | |
2963 | goto out3; | |
d342894c | 2964 | |
acaf4e70 DB |
2965 | return 0; |
2966 | out3: | |
2967 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 2968 | out2: |
783c1463 | 2969 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 2970 | out1: |
758c57d1 | 2971 | destroy_workqueue(vxlan_wq); |
d342894c | 2972 | return rc; |
2973 | } | |
7332a13b | 2974 | late_initcall(vxlan_init_module); |
d342894c | 2975 | |
2976 | static void __exit vxlan_cleanup_module(void) | |
2977 | { | |
b7153984 | 2978 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 2979 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 2980 | destroy_workqueue(vxlan_wq); |
783c1463 DB |
2981 | unregister_pernet_subsys(&vxlan_net_ops); |
2982 | /* rcu_barrier() is called by netns */ | |
d342894c | 2983 | } |
2984 | module_exit(vxlan_cleanup_module); | |
2985 | ||
2986 | MODULE_LICENSE("GPL"); | |
2987 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 2988 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 2989 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 2990 | MODULE_ALIAS_RTNL_LINK("vxlan"); |