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Commit | Line | Data |
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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 */ | |
6bae1d4c | 568 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
569 | |
570 | off_eth = skb_gro_offset(skb); | |
571 | hlen = off_eth + sizeof(*eh); | |
572 | eh = skb_gro_header_fast(skb, off_eth); | |
573 | if (skb_gro_header_hard(skb, hlen)) { | |
574 | eh = skb_gro_header_slow(skb, hlen, off_eth); | |
575 | if (unlikely(!eh)) | |
576 | goto out; | |
577 | } | |
578 | ||
579 | flush = 0; | |
580 | ||
581 | for (p = *head; p; p = p->next) { | |
582 | if (!NAPI_GRO_CB(p)->same_flow) | |
583 | continue; | |
584 | ||
585 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
586 | eh2 = (struct ethhdr *)(p->data + off_eth); | |
587 | if (vh->vx_vni != vh2->vx_vni || compare_ether_header(eh, eh2)) { | |
588 | NAPI_GRO_CB(p)->same_flow = 0; | |
589 | continue; | |
590 | } | |
dc01e7d3 OG |
591 | } |
592 | ||
dc01e7d3 OG |
593 | type = eh->h_proto; |
594 | ||
595 | rcu_read_lock(); | |
596 | ptype = gro_find_receive_by_type(type); | |
597 | if (ptype == NULL) { | |
598 | flush = 1; | |
599 | goto out_unlock; | |
600 | } | |
601 | ||
602 | skb_gro_pull(skb, sizeof(*eh)); /* pull inner eth header */ | |
6bae1d4c | 603 | skb_gro_postpull_rcsum(skb, eh, sizeof(*eh)); |
dc01e7d3 OG |
604 | pp = ptype->callbacks.gro_receive(head, skb); |
605 | ||
606 | out_unlock: | |
607 | rcu_read_unlock(); | |
608 | out: | |
609 | NAPI_GRO_CB(skb)->flush |= flush; | |
610 | ||
611 | return pp; | |
612 | } | |
613 | ||
614 | static int vxlan_gro_complete(struct sk_buff *skb, int nhoff) | |
615 | { | |
616 | struct ethhdr *eh; | |
617 | struct packet_offload *ptype; | |
618 | __be16 type; | |
619 | int vxlan_len = sizeof(struct vxlanhdr) + sizeof(struct ethhdr); | |
620 | int err = -ENOSYS; | |
621 | ||
622 | eh = (struct ethhdr *)(skb->data + nhoff + sizeof(struct vxlanhdr)); | |
623 | type = eh->h_proto; | |
624 | ||
625 | rcu_read_lock(); | |
626 | ptype = gro_find_complete_by_type(type); | |
627 | if (ptype != NULL) | |
628 | err = ptype->callbacks.gro_complete(skb, nhoff + vxlan_len); | |
629 | ||
630 | rcu_read_unlock(); | |
631 | return err; | |
632 | } | |
633 | ||
53cf5275 | 634 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 635 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
636 | { |
637 | struct net_device *dev; | |
dc01e7d3 | 638 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
639 | struct net *net = sock_net(sk); |
640 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 641 | __be16 port = inet_sk(sk)->inet_sport; |
dc01e7d3 OG |
642 | int err; |
643 | ||
644 | if (sa_family == AF_INET) { | |
645 | err = udp_add_offload(&vs->udp_offloads); | |
646 | if (err) | |
647 | pr_warn("vxlan: udp_add_offload failed with status %d\n", err); | |
648 | } | |
53cf5275 JG |
649 | |
650 | rcu_read_lock(); | |
651 | for_each_netdev_rcu(net, dev) { | |
652 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
653 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
654 | port); | |
655 | } | |
656 | rcu_read_unlock(); | |
657 | } | |
658 | ||
659 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 660 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
661 | { |
662 | struct net_device *dev; | |
dc01e7d3 | 663 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
664 | struct net *net = sock_net(sk); |
665 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 666 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
667 | |
668 | rcu_read_lock(); | |
669 | for_each_netdev_rcu(net, dev) { | |
670 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
671 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
672 | port); | |
673 | } | |
674 | rcu_read_unlock(); | |
dc01e7d3 OG |
675 | |
676 | if (sa_family == AF_INET) | |
677 | udp_del_offload(&vs->udp_offloads); | |
53cf5275 JG |
678 | } |
679 | ||
d342894c | 680 | /* Add new entry to forwarding table -- assumes lock held */ |
681 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 682 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 683 | __u16 state, __u16 flags, |
73cf3317 | 684 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 685 | __u8 ndm_flags) |
d342894c | 686 | { |
9e4b93f9 | 687 | struct vxlan_rdst *rd = NULL; |
d342894c | 688 | struct vxlan_fdb *f; |
689 | int notify = 0; | |
690 | ||
014be2c8 | 691 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 692 | if (f) { |
693 | if (flags & NLM_F_EXCL) { | |
694 | netdev_dbg(vxlan->dev, | |
695 | "lost race to create %pM\n", mac); | |
696 | return -EEXIST; | |
697 | } | |
698 | if (f->state != state) { | |
699 | f->state = state; | |
700 | f->updated = jiffies; | |
701 | notify = 1; | |
702 | } | |
ae884082 DS |
703 | if (f->flags != ndm_flags) { |
704 | f->flags = ndm_flags; | |
705 | f->updated = jiffies; | |
706 | notify = 1; | |
707 | } | |
906dc186 TR |
708 | if ((flags & NLM_F_REPLACE)) { |
709 | /* Only change unicasts */ | |
710 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
711 | is_zero_ether_addr(f->eth_addr))) { | |
712 | int rc = vxlan_fdb_replace(f, ip, port, vni, | |
713 | ifindex); | |
714 | ||
715 | if (rc < 0) | |
716 | return rc; | |
717 | notify |= rc; | |
718 | } else | |
719 | return -EOPNOTSUPP; | |
720 | } | |
6681712d | 721 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
722 | (is_multicast_ether_addr(f->eth_addr) || |
723 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
724 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
725 | &rd); | |
6681712d DS |
726 | |
727 | if (rc < 0) | |
728 | return rc; | |
729 | notify |= rc; | |
730 | } | |
d342894c | 731 | } else { |
732 | if (!(flags & NLM_F_CREATE)) | |
733 | return -ENOENT; | |
734 | ||
735 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
736 | return -ENOSPC; | |
737 | ||
906dc186 TR |
738 | /* Disallow replace to add a multicast entry */ |
739 | if ((flags & NLM_F_REPLACE) && | |
740 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
741 | return -EOPNOTSUPP; | |
742 | ||
e4c7ed41 | 743 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 744 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
745 | if (!f) | |
746 | return -ENOMEM; | |
747 | ||
748 | notify = 1; | |
d342894c | 749 | f->state = state; |
ae884082 | 750 | f->flags = ndm_flags; |
d342894c | 751 | f->updated = f->used = jiffies; |
3e61aa8f | 752 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 753 | memcpy(f->eth_addr, mac, ETH_ALEN); |
754 | ||
9e4b93f9 | 755 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 756 | |
d342894c | 757 | ++vxlan->addrcnt; |
758 | hlist_add_head_rcu(&f->hlist, | |
759 | vxlan_fdb_head(vxlan, mac)); | |
760 | } | |
761 | ||
9e4b93f9 ND |
762 | if (notify) { |
763 | if (rd == NULL) | |
764 | rd = first_remote_rtnl(f); | |
765 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
766 | } | |
d342894c | 767 | |
768 | return 0; | |
769 | } | |
770 | ||
6706c82e | 771 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
772 | { |
773 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 774 | struct vxlan_rdst *rd, *nd; |
6681712d | 775 | |
3e61aa8f | 776 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 777 | kfree(rd); |
6681712d DS |
778 | kfree(f); |
779 | } | |
780 | ||
d342894c | 781 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
782 | { | |
783 | netdev_dbg(vxlan->dev, | |
784 | "delete %pM\n", f->eth_addr); | |
785 | ||
786 | --vxlan->addrcnt; | |
9e4b93f9 | 787 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 788 | |
789 | hlist_del_rcu(&f->hlist); | |
6681712d | 790 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 791 | } |
792 | ||
f0b074be | 793 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
e4c7ed41 | 794 | union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex) |
d342894c | 795 | { |
6681712d | 796 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 797 | int err; |
d342894c | 798 | |
f0b074be | 799 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
800 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
801 | if (err) | |
802 | return err; | |
f0b074be | 803 | } else { |
e4c7ed41 CW |
804 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
805 | if (remote->sa.sa_family == AF_INET) { | |
806 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
807 | ip->sa.sa_family = AF_INET; | |
808 | #if IS_ENABLED(CONFIG_IPV6) | |
809 | } else { | |
810 | ip->sin6.sin6_addr = in6addr_any; | |
811 | ip->sa.sa_family = AF_INET6; | |
812 | #endif | |
813 | } | |
f0b074be | 814 | } |
d342894c | 815 | |
6681712d | 816 | if (tb[NDA_PORT]) { |
73cf3317 | 817 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 818 | return -EINVAL; |
f0b074be MR |
819 | *port = nla_get_be16(tb[NDA_PORT]); |
820 | } else { | |
821 | *port = vxlan->dst_port; | |
822 | } | |
6681712d DS |
823 | |
824 | if (tb[NDA_VNI]) { | |
825 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
826 | return -EINVAL; | |
f0b074be MR |
827 | *vni = nla_get_u32(tb[NDA_VNI]); |
828 | } else { | |
829 | *vni = vxlan->default_dst.remote_vni; | |
830 | } | |
6681712d DS |
831 | |
832 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 833 | struct net_device *tdev; |
6681712d DS |
834 | |
835 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
836 | return -EINVAL; | |
f0b074be | 837 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 838 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 839 | if (!tdev) |
6681712d | 840 | return -EADDRNOTAVAIL; |
f0b074be MR |
841 | } else { |
842 | *ifindex = 0; | |
843 | } | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | /* Add static entry (via netlink) */ | |
849 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
850 | struct net_device *dev, | |
851 | const unsigned char *addr, u16 flags) | |
852 | { | |
853 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
854 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 855 | union vxlan_addr ip; |
f0b074be MR |
856 | __be16 port; |
857 | u32 vni, ifindex; | |
858 | int err; | |
859 | ||
860 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
861 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
862 | ndm->ndm_state); | |
863 | return -EINVAL; | |
864 | } | |
865 | ||
866 | if (tb[NDA_DST] == NULL) | |
867 | return -EINVAL; | |
868 | ||
869 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
870 | if (err) | |
871 | return err; | |
6681712d | 872 | |
5933a7bb MR |
873 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
874 | return -EAFNOSUPPORT; | |
875 | ||
d342894c | 876 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 877 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 878 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 879 | spin_unlock_bh(&vxlan->hash_lock); |
880 | ||
881 | return err; | |
882 | } | |
883 | ||
884 | /* Delete entry (via netlink) */ | |
1690be63 VY |
885 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
886 | struct net_device *dev, | |
d342894c | 887 | const unsigned char *addr) |
888 | { | |
889 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
890 | struct vxlan_fdb *f; | |
bc7892ba | 891 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 892 | union vxlan_addr ip; |
bc7892ba MR |
893 | __be16 port; |
894 | u32 vni, ifindex; | |
895 | int err; | |
896 | ||
897 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
898 | if (err) | |
899 | return err; | |
900 | ||
901 | err = -ENOENT; | |
d342894c | 902 | |
903 | spin_lock_bh(&vxlan->hash_lock); | |
904 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
905 | if (!f) |
906 | goto out; | |
907 | ||
e4c7ed41 CW |
908 | if (!vxlan_addr_any(&ip)) { |
909 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
910 | if (!rd) |
911 | goto out; | |
912 | } | |
913 | ||
914 | err = 0; | |
915 | ||
916 | /* remove a destination if it's not the only one on the list, | |
917 | * otherwise destroy the fdb entry | |
918 | */ | |
919 | if (rd && !list_is_singular(&f->remotes)) { | |
920 | list_del_rcu(&rd->list); | |
9e4b93f9 | 921 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 922 | kfree_rcu(rd, rcu); |
bc7892ba | 923 | goto out; |
d342894c | 924 | } |
bc7892ba MR |
925 | |
926 | vxlan_fdb_destroy(vxlan, f); | |
927 | ||
928 | out: | |
d342894c | 929 | spin_unlock_bh(&vxlan->hash_lock); |
930 | ||
931 | return err; | |
932 | } | |
933 | ||
934 | /* Dump forwarding table */ | |
935 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
936 | struct net_device *dev, int idx) | |
937 | { | |
938 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
939 | unsigned int h; | |
940 | ||
941 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
942 | struct vxlan_fdb *f; | |
d342894c | 943 | int err; |
944 | ||
b67bfe0d | 945 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 946 | struct vxlan_rdst *rd; |
6681712d | 947 | |
3e61aa8f SH |
948 | if (idx < cb->args[0]) |
949 | goto skip; | |
950 | ||
951 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
952 | err = vxlan_fdb_info(skb, vxlan, f, |
953 | NETLINK_CB(cb->skb).portid, | |
954 | cb->nlh->nlmsg_seq, | |
955 | RTM_NEWNEIGH, | |
956 | NLM_F_MULTI, rd); | |
957 | if (err < 0) | |
3e61aa8f | 958 | goto out; |
6681712d | 959 | } |
3e61aa8f SH |
960 | skip: |
961 | ++idx; | |
d342894c | 962 | } |
963 | } | |
3e61aa8f | 964 | out: |
d342894c | 965 | return idx; |
966 | } | |
967 | ||
968 | /* Watch incoming packets to learn mapping between Ethernet address | |
969 | * and Tunnel endpoint. | |
26a41ae6 | 970 | * Return true if packet is bogus and should be droppped. |
d342894c | 971 | */ |
26a41ae6 | 972 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 973 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 974 | { |
975 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
976 | struct vxlan_fdb *f; | |
d342894c | 977 | |
978 | f = vxlan_find_mac(vxlan, src_mac); | |
979 | if (likely(f)) { | |
5ca5461c | 980 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 981 | |
e4c7ed41 | 982 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 983 | return false; |
984 | ||
985 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 986 | if (f->state & NUD_NOARP) |
26a41ae6 | 987 | return true; |
d342894c | 988 | |
989 | if (net_ratelimit()) | |
990 | netdev_info(dev, | |
e4c7ed41 | 991 | "%pM migrated from %pIS to %pIS\n", |
3e61aa8f | 992 | src_mac, &rdst->remote_ip, &src_ip); |
d342894c | 993 | |
e4c7ed41 | 994 | rdst->remote_ip = *src_ip; |
d342894c | 995 | f->updated = jiffies; |
9e4b93f9 | 996 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 997 | } else { |
998 | /* learned new entry */ | |
999 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 1000 | |
1001 | /* close off race between vxlan_flush and incoming packets */ | |
1002 | if (netif_running(dev)) | |
1003 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
1004 | NUD_REACHABLE, | |
1005 | NLM_F_EXCL|NLM_F_CREATE, | |
1006 | vxlan->dst_port, | |
1007 | vxlan->default_dst.remote_vni, | |
1008 | 0, NTF_SELF); | |
d342894c | 1009 | spin_unlock(&vxlan->hash_lock); |
1010 | } | |
26a41ae6 | 1011 | |
1012 | return false; | |
d342894c | 1013 | } |
1014 | ||
d342894c | 1015 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1016 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1017 | { |
553675fb | 1018 | struct vxlan_dev *vxlan; |
d342894c | 1019 | |
95ab0991 G |
1020 | /* The vxlan_sock is only used by dev, leaving group has |
1021 | * no effect on other vxlan devices. | |
1022 | */ | |
1023 | if (atomic_read(&dev->vn_sock->refcnt) == 1) | |
1024 | return false; | |
1025 | ||
553675fb | 1026 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1027 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1028 | continue; |
d342894c | 1029 | |
95ab0991 G |
1030 | if (vxlan->vn_sock != dev->vn_sock) |
1031 | continue; | |
1032 | ||
1033 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1034 | &dev->default_dst.remote_ip)) | |
1035 | continue; | |
1036 | ||
1037 | if (vxlan->default_dst.remote_ifindex != | |
1038 | dev->default_dst.remote_ifindex) | |
1039 | continue; | |
1040 | ||
1041 | return true; | |
553675fb | 1042 | } |
d342894c | 1043 | |
1044 | return false; | |
1045 | } | |
1046 | ||
7c47cedf | 1047 | static void vxlan_sock_hold(struct vxlan_sock *vs) |
d342894c | 1048 | { |
7c47cedf SH |
1049 | atomic_inc(&vs->refcnt); |
1050 | } | |
d342894c | 1051 | |
012a5729 | 1052 | void vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 1053 | { |
53cf5275 JG |
1054 | struct sock *sk = vs->sock->sk; |
1055 | struct net *net = sock_net(sk); | |
1056 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
012a5729 | 1057 | |
7c47cedf SH |
1058 | if (!atomic_dec_and_test(&vs->refcnt)) |
1059 | return; | |
d342894c | 1060 | |
1c51a915 | 1061 | spin_lock(&vn->sock_lock); |
7c47cedf | 1062 | hlist_del_rcu(&vs->hlist); |
559835ea | 1063 | rcu_assign_sk_user_data(vs->sock->sk, NULL); |
dc01e7d3 | 1064 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1065 | spin_unlock(&vn->sock_lock); |
1066 | ||
7c47cedf | 1067 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 1068 | } |
012a5729 | 1069 | EXPORT_SYMBOL_GPL(vxlan_sock_release); |
d342894c | 1070 | |
3fc2de2f | 1071 | /* Callback to update multicast group membership when first VNI on |
1072 | * multicast asddress is brought up | |
1073 | * Done as workqueue because ip_mc_join_group acquires RTNL. | |
7c47cedf | 1074 | */ |
3fc2de2f | 1075 | static void vxlan_igmp_join(struct work_struct *work) |
d342894c | 1076 | { |
3fc2de2f | 1077 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_join); |
7c47cedf SH |
1078 | struct vxlan_sock *vs = vxlan->vn_sock; |
1079 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1080 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1081 | int ifindex = vxlan->default_dst.remote_ifindex; | |
d342894c | 1082 | |
d342894c | 1083 | lock_sock(sk); |
e4c7ed41 CW |
1084 | if (ip->sa.sa_family == AF_INET) { |
1085 | struct ip_mreqn mreq = { | |
1086 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1087 | .imr_ifindex = ifindex, | |
1088 | }; | |
1089 | ||
1090 | ip_mc_join_group(sk, &mreq); | |
1091 | #if IS_ENABLED(CONFIG_IPV6) | |
1092 | } else { | |
1093 | ipv6_stub->ipv6_sock_mc_join(sk, ifindex, | |
1094 | &ip->sin6.sin6_addr); | |
1095 | #endif | |
1096 | } | |
3fc2de2f | 1097 | release_sock(sk); |
1098 | ||
012a5729 | 1099 | vxlan_sock_release(vs); |
3fc2de2f | 1100 | dev_put(vxlan->dev); |
1101 | } | |
1102 | ||
1103 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
1104 | static void vxlan_igmp_leave(struct work_struct *work) | |
1105 | { | |
1106 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_leave); | |
3fc2de2f | 1107 | struct vxlan_sock *vs = vxlan->vn_sock; |
1108 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1109 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1110 | int ifindex = vxlan->default_dst.remote_ifindex; | |
3fc2de2f | 1111 | |
1112 | lock_sock(sk); | |
e4c7ed41 CW |
1113 | if (ip->sa.sa_family == AF_INET) { |
1114 | struct ip_mreqn mreq = { | |
1115 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1116 | .imr_ifindex = ifindex, | |
1117 | }; | |
1118 | ||
1119 | ip_mc_leave_group(sk, &mreq); | |
1120 | #if IS_ENABLED(CONFIG_IPV6) | |
1121 | } else { | |
1122 | ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, | |
1123 | &ip->sin6.sin6_addr); | |
1124 | #endif | |
1125 | } | |
1126 | ||
d342894c | 1127 | release_sock(sk); |
d342894c | 1128 | |
012a5729 | 1129 | vxlan_sock_release(vs); |
7c47cedf | 1130 | dev_put(vxlan->dev); |
d342894c | 1131 | } |
1132 | ||
1133 | /* Callback from net/ipv4/udp.c to receive packets */ | |
1134 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
1135 | { | |
5cfccc5a | 1136 | struct vxlan_sock *vs; |
d342894c | 1137 | struct vxlanhdr *vxh; |
d342894c | 1138 | |
d342894c | 1139 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1140 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 1141 | goto error; |
1142 | ||
7ce04758 PS |
1143 | /* Return packets with reserved bits set */ |
1144 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
d342894c | 1145 | if (vxh->vx_flags != htonl(VXLAN_FLAGS) || |
1146 | (vxh->vx_vni & htonl(0xff))) { | |
1147 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1148 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
1149 | goto error; | |
1150 | } | |
1151 | ||
5cfccc5a PS |
1152 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
1153 | goto drop; | |
1154 | ||
559835ea | 1155 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1156 | if (!vs) |
d342894c | 1157 | goto drop; |
d342894c | 1158 | |
f79b064c | 1159 | skb_pop_rcv_encapsulation(skb); |
d0bc6555 | 1160 | |
5cfccc5a PS |
1161 | vs->rcv(vs, skb, vxh->vx_vni); |
1162 | return 0; | |
1163 | ||
1164 | drop: | |
1165 | /* Consume bad packet */ | |
1166 | kfree_skb(skb); | |
1167 | return 0; | |
1168 | ||
1169 | error: | |
1170 | /* Return non vxlan pkt */ | |
1171 | return 1; | |
1172 | } | |
1173 | ||
1174 | static void vxlan_rcv(struct vxlan_sock *vs, | |
1175 | struct sk_buff *skb, __be32 vx_vni) | |
1176 | { | |
e4c7ed41 CW |
1177 | struct iphdr *oip = NULL; |
1178 | struct ipv6hdr *oip6 = NULL; | |
5cfccc5a | 1179 | struct vxlan_dev *vxlan; |
8f84985f | 1180 | struct pcpu_sw_netstats *stats; |
e4c7ed41 | 1181 | union vxlan_addr saddr; |
5cfccc5a | 1182 | __u32 vni; |
e4c7ed41 CW |
1183 | int err = 0; |
1184 | union vxlan_addr *remote_ip; | |
5cfccc5a PS |
1185 | |
1186 | vni = ntohl(vx_vni) >> 8; | |
1187 | /* Is this VNI defined? */ | |
1188 | vxlan = vxlan_vs_find_vni(vs, vni); | |
1189 | if (!vxlan) | |
d342894c | 1190 | goto drop; |
d342894c | 1191 | |
e4c7ed41 | 1192 | remote_ip = &vxlan->default_dst.remote_ip; |
e4f67add | 1193 | skb_reset_mac_header(skb); |
f01ec1c0 | 1194 | skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev))); |
d342894c | 1195 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
f79b064c | 1196 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
d342894c | 1197 | |
1198 | /* Ignore packet loops (and multicast echo) */ | |
7367d0b5 | 1199 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) |
d342894c | 1200 | goto drop; |
1201 | ||
7ce04758 | 1202 | /* Re-examine inner Ethernet packet */ |
e4c7ed41 CW |
1203 | if (remote_ip->sa.sa_family == AF_INET) { |
1204 | oip = ip_hdr(skb); | |
1205 | saddr.sin.sin_addr.s_addr = oip->saddr; | |
1206 | saddr.sa.sa_family = AF_INET; | |
1207 | #if IS_ENABLED(CONFIG_IPV6) | |
1208 | } else { | |
1209 | oip6 = ipv6_hdr(skb); | |
1210 | saddr.sin6.sin6_addr = oip6->saddr; | |
1211 | saddr.sa.sa_family = AF_INET6; | |
1212 | #endif | |
1213 | } | |
1214 | ||
26a41ae6 | 1215 | if ((vxlan->flags & VXLAN_F_LEARN) && |
e4c7ed41 | 1216 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) |
26a41ae6 | 1217 | goto drop; |
d342894c | 1218 | |
d342894c | 1219 | skb_reset_network_header(skb); |
0afb1666 | 1220 | |
e4c7ed41 CW |
1221 | if (oip6) |
1222 | err = IP6_ECN_decapsulate(oip6, skb); | |
1223 | if (oip) | |
1224 | err = IP_ECN_decapsulate(oip, skb); | |
1225 | ||
d342894c | 1226 | if (unlikely(err)) { |
e4c7ed41 CW |
1227 | if (log_ecn_error) { |
1228 | if (oip6) | |
1229 | net_info_ratelimited("non-ECT from %pI6\n", | |
1230 | &oip6->saddr); | |
1231 | if (oip) | |
1232 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1233 | &oip->saddr, oip->tos); | |
1234 | } | |
d342894c | 1235 | if (err > 1) { |
1236 | ++vxlan->dev->stats.rx_frame_errors; | |
1237 | ++vxlan->dev->stats.rx_errors; | |
1238 | goto drop; | |
1239 | } | |
1240 | } | |
1241 | ||
e8171045 | 1242 | stats = this_cpu_ptr(vxlan->dev->tstats); |
d342894c | 1243 | u64_stats_update_begin(&stats->syncp); |
1244 | stats->rx_packets++; | |
1245 | stats->rx_bytes += skb->len; | |
1246 | u64_stats_update_end(&stats->syncp); | |
1247 | ||
1248 | netif_rx(skb); | |
1249 | ||
5cfccc5a | 1250 | return; |
d342894c | 1251 | drop: |
1252 | /* Consume bad packet */ | |
1253 | kfree_skb(skb); | |
d342894c | 1254 | } |
1255 | ||
e4f67add DS |
1256 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1257 | { | |
1258 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1259 | struct arphdr *parp; | |
1260 | u8 *arpptr, *sha; | |
1261 | __be32 sip, tip; | |
1262 | struct neighbour *n; | |
1263 | ||
1264 | if (dev->flags & IFF_NOARP) | |
1265 | goto out; | |
1266 | ||
1267 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1268 | dev->stats.tx_dropped++; | |
1269 | goto out; | |
1270 | } | |
1271 | parp = arp_hdr(skb); | |
1272 | ||
1273 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1274 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1275 | parp->ar_pro != htons(ETH_P_IP) || | |
1276 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1277 | parp->ar_hln != dev->addr_len || | |
1278 | parp->ar_pln != 4) | |
1279 | goto out; | |
1280 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1281 | sha = arpptr; | |
1282 | arpptr += dev->addr_len; /* sha */ | |
1283 | memcpy(&sip, arpptr, sizeof(sip)); | |
1284 | arpptr += sizeof(sip); | |
1285 | arpptr += dev->addr_len; /* tha */ | |
1286 | memcpy(&tip, arpptr, sizeof(tip)); | |
1287 | ||
1288 | if (ipv4_is_loopback(tip) || | |
1289 | ipv4_is_multicast(tip)) | |
1290 | goto out; | |
1291 | ||
1292 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1293 | ||
1294 | if (n) { | |
e4f67add DS |
1295 | struct vxlan_fdb *f; |
1296 | struct sk_buff *reply; | |
1297 | ||
1298 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1299 | neigh_release(n); | |
1300 | goto out; | |
1301 | } | |
1302 | ||
1303 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1304 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1305 | /* bridge-local neighbor */ |
1306 | neigh_release(n); | |
1307 | goto out; | |
1308 | } | |
1309 | ||
1310 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1311 | n->ha, sha); | |
1312 | ||
1313 | neigh_release(n); | |
1314 | ||
7346135d DS |
1315 | if (reply == NULL) |
1316 | goto out; | |
1317 | ||
e4f67add DS |
1318 | skb_reset_mac_header(reply); |
1319 | __skb_pull(reply, skb_network_offset(reply)); | |
1320 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1321 | reply->pkt_type = PACKET_HOST; | |
1322 | ||
1323 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1324 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1325 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1326 | union vxlan_addr ipa = { | |
1327 | .sin.sin_addr.s_addr = tip, | |
1328 | .sa.sa_family = AF_INET, | |
1329 | }; | |
1330 | ||
1331 | vxlan_ip_miss(dev, &ipa); | |
1332 | } | |
e4f67add DS |
1333 | out: |
1334 | consume_skb(skb); | |
1335 | return NETDEV_TX_OK; | |
1336 | } | |
1337 | ||
f564f45c | 1338 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1339 | |
1340 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, | |
1341 | struct neighbour *n, bool isrouter) | |
1342 | { | |
1343 | struct net_device *dev = request->dev; | |
1344 | struct sk_buff *reply; | |
1345 | struct nd_msg *ns, *na; | |
1346 | struct ipv6hdr *pip6; | |
1347 | u8 *daddr; | |
1348 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1349 | int ns_olen; | |
1350 | int i, len; | |
1351 | ||
1352 | if (dev == NULL) | |
1353 | return NULL; | |
1354 | ||
1355 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1356 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1357 | reply = alloc_skb(len, GFP_ATOMIC); | |
1358 | if (reply == NULL) | |
1359 | return NULL; | |
1360 | ||
1361 | reply->protocol = htons(ETH_P_IPV6); | |
1362 | reply->dev = dev; | |
1363 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1364 | skb_push(reply, sizeof(struct ethhdr)); | |
1365 | skb_set_mac_header(reply, 0); | |
1366 | ||
1367 | ns = (struct nd_msg *)skb_transport_header(request); | |
1368 | ||
1369 | daddr = eth_hdr(request)->h_source; | |
1370 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1371 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1372 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1373 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1374 | break; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | /* Ethernet header */ | |
1379 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1380 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1381 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1382 | reply->protocol = htons(ETH_P_IPV6); | |
1383 | ||
1384 | skb_pull(reply, sizeof(struct ethhdr)); | |
1385 | skb_set_network_header(reply, 0); | |
1386 | skb_put(reply, sizeof(struct ipv6hdr)); | |
1387 | ||
1388 | /* IPv6 header */ | |
1389 | ||
1390 | pip6 = ipv6_hdr(reply); | |
1391 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1392 | pip6->version = 6; | |
1393 | pip6->priority = ipv6_hdr(request)->priority; | |
1394 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1395 | pip6->hop_limit = 255; | |
1396 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1397 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1398 | ||
1399 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
1400 | skb_set_transport_header(reply, 0); | |
1401 | ||
1402 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1403 | ||
1404 | /* Neighbor Advertisement */ | |
1405 | memset(na, 0, sizeof(*na)+na_olen); | |
1406 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1407 | na->icmph.icmp6_router = isrouter; | |
1408 | na->icmph.icmp6_override = 1; | |
1409 | na->icmph.icmp6_solicited = 1; | |
1410 | na->target = ns->target; | |
1411 | ether_addr_copy(&na->opt[2], n->ha); | |
1412 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1413 | na->opt[1] = na_olen >> 3; | |
1414 | ||
1415 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1416 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1417 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1418 | ||
1419 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1420 | ||
1421 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1422 | ||
1423 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1424 | ||
1425 | return reply; | |
1426 | } | |
1427 | ||
f564f45c CW |
1428 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1429 | { | |
1430 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1431 | struct nd_msg *msg; |
f564f45c CW |
1432 | const struct ipv6hdr *iphdr; |
1433 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1434 | struct neighbour *n; |
1435 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1436 | |
1437 | in6_dev = __in6_dev_get(dev); | |
1438 | if (!in6_dev) | |
1439 | goto out; | |
1440 | ||
1441 | if (!pskb_may_pull(skb, skb->len)) | |
1442 | goto out; | |
1443 | ||
1444 | iphdr = ipv6_hdr(skb); | |
1445 | saddr = &iphdr->saddr; | |
1446 | daddr = &iphdr->daddr; | |
1447 | ||
f564f45c CW |
1448 | msg = (struct nd_msg *)skb_transport_header(skb); |
1449 | if (msg->icmph.icmp6_code != 0 || | |
1450 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1451 | goto out; | |
1452 | ||
4b29dba9 DS |
1453 | if (ipv6_addr_loopback(daddr) || |
1454 | ipv6_addr_is_multicast(&msg->target)) | |
1455 | goto out; | |
1456 | ||
1457 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1458 | |
1459 | if (n) { | |
1460 | struct vxlan_fdb *f; | |
4b29dba9 | 1461 | struct sk_buff *reply; |
f564f45c CW |
1462 | |
1463 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1464 | neigh_release(n); | |
1465 | goto out; | |
1466 | } | |
1467 | ||
1468 | f = vxlan_find_mac(vxlan, n->ha); | |
1469 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1470 | /* bridge-local neighbor */ | |
1471 | neigh_release(n); | |
1472 | goto out; | |
1473 | } | |
1474 | ||
4b29dba9 DS |
1475 | reply = vxlan_na_create(skb, n, |
1476 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1477 | ||
f564f45c | 1478 | neigh_release(n); |
4b29dba9 DS |
1479 | |
1480 | if (reply == NULL) | |
1481 | goto out; | |
1482 | ||
1483 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1484 | dev->stats.rx_dropped++; | |
1485 | ||
f564f45c | 1486 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1487 | union vxlan_addr ipa = { |
1488 | .sin6.sin6_addr = msg->target, | |
1489 | .sa.sa_family = AF_INET6, | |
1490 | }; | |
1491 | ||
f564f45c CW |
1492 | vxlan_ip_miss(dev, &ipa); |
1493 | } | |
1494 | ||
1495 | out: | |
1496 | consume_skb(skb); | |
1497 | return NETDEV_TX_OK; | |
1498 | } | |
1499 | #endif | |
1500 | ||
e4f67add DS |
1501 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1502 | { | |
1503 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1504 | struct neighbour *n; | |
e4f67add DS |
1505 | |
1506 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1507 | return false; | |
1508 | ||
1509 | n = NULL; | |
1510 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1511 | case ETH_P_IP: | |
e15a00aa CW |
1512 | { |
1513 | struct iphdr *pip; | |
1514 | ||
e4f67add DS |
1515 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1516 | return false; | |
1517 | pip = ip_hdr(skb); | |
1518 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1519 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1520 | union vxlan_addr ipa = { | |
1521 | .sin.sin_addr.s_addr = pip->daddr, | |
1522 | .sa.sa_family = AF_INET, | |
1523 | }; | |
1524 | ||
1525 | vxlan_ip_miss(dev, &ipa); | |
1526 | return false; | |
1527 | } | |
1528 | ||
e4f67add | 1529 | break; |
e15a00aa CW |
1530 | } |
1531 | #if IS_ENABLED(CONFIG_IPV6) | |
1532 | case ETH_P_IPV6: | |
1533 | { | |
1534 | struct ipv6hdr *pip6; | |
1535 | ||
1536 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1537 | return false; | |
1538 | pip6 = ipv6_hdr(skb); | |
1539 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1540 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1541 | union vxlan_addr ipa = { | |
1542 | .sin6.sin6_addr = pip6->daddr, | |
1543 | .sa.sa_family = AF_INET6, | |
1544 | }; | |
1545 | ||
1546 | vxlan_ip_miss(dev, &ipa); | |
1547 | return false; | |
1548 | } | |
1549 | ||
1550 | break; | |
1551 | } | |
1552 | #endif | |
e4f67add DS |
1553 | default: |
1554 | return false; | |
1555 | } | |
1556 | ||
1557 | if (n) { | |
1558 | bool diff; | |
1559 | ||
7367d0b5 | 1560 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1561 | if (diff) { |
1562 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1563 | dev->addr_len); | |
1564 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1565 | } | |
1566 | neigh_release(n); | |
1567 | return diff; | |
e4c7ed41 CW |
1568 | } |
1569 | ||
e4f67add DS |
1570 | return false; |
1571 | } | |
1572 | ||
05f47d69 | 1573 | /* Compute source port for outgoing packet |
1574 | * first choice to use L4 flow hash since it will spread | |
1575 | * better and maybe available from hardware | |
1576 | * secondary choice is to use jhash on the Ethernet header | |
1577 | */ | |
49560532 | 1578 | __be16 vxlan_src_port(__u16 port_min, __u16 port_max, struct sk_buff *skb) |
05f47d69 | 1579 | { |
49560532 | 1580 | unsigned int range = (port_max - port_min) + 1; |
05f47d69 | 1581 | u32 hash; |
1582 | ||
3958afa1 | 1583 | hash = skb_get_hash(skb); |
05f47d69 | 1584 | if (!hash) |
1585 | hash = jhash(skb->data, 2 * ETH_ALEN, | |
1586 | (__force u32) skb->protocol); | |
1587 | ||
49560532 | 1588 | return htons((((u64) hash * range) >> 32) + port_min); |
05f47d69 | 1589 | } |
49560532 | 1590 | EXPORT_SYMBOL_GPL(vxlan_src_port); |
05f47d69 | 1591 | |
359a0ea9 TH |
1592 | static inline struct sk_buff *vxlan_handle_offloads(struct sk_buff *skb, |
1593 | bool udp_csum) | |
05c0db08 | 1594 | { |
359a0ea9 TH |
1595 | int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1596 | return iptunnel_handle_offloads(skb, udp_csum, type); | |
05c0db08 PS |
1597 | } |
1598 | ||
e4c7ed41 | 1599 | #if IS_ENABLED(CONFIG_IPV6) |
11796187 | 1600 | static int vxlan6_xmit_skb(struct vxlan_sock *vs, |
e4c7ed41 CW |
1601 | struct dst_entry *dst, struct sk_buff *skb, |
1602 | struct net_device *dev, struct in6_addr *saddr, | |
1603 | struct in6_addr *daddr, __u8 prio, __u8 ttl, | |
f01ec1c0 ND |
1604 | __be16 src_port, __be16 dst_port, __be32 vni, |
1605 | bool xnet) | |
e4c7ed41 CW |
1606 | { |
1607 | struct ipv6hdr *ip6h; | |
1608 | struct vxlanhdr *vxh; | |
1609 | struct udphdr *uh; | |
1610 | int min_headroom; | |
1611 | int err; | |
1612 | ||
359a0ea9 TH |
1613 | skb = vxlan_handle_offloads(skb, !udp_get_no_check6_tx(vs->sock->sk)); |
1614 | if (IS_ERR(skb)) | |
1615 | return -EINVAL; | |
e4c7ed41 | 1616 | |
f01ec1c0 | 1617 | skb_scrub_packet(skb, xnet); |
963a88b3 | 1618 | |
e4c7ed41 CW |
1619 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
1620 | + VXLAN_HLEN + sizeof(struct ipv6hdr) | |
1621 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
1622 | ||
1623 | /* Need space for new headers (invalidates iph ptr) */ | |
1624 | err = skb_cow_head(skb, min_headroom); | |
1625 | if (unlikely(err)) | |
1626 | return err; | |
1627 | ||
1628 | if (vlan_tx_tag_present(skb)) { | |
1629 | if (WARN_ON(!__vlan_put_tag(skb, | |
1630 | skb->vlan_proto, | |
1631 | vlan_tx_tag_get(skb)))) | |
1632 | return -ENOMEM; | |
1633 | ||
1634 | skb->vlan_tci = 0; | |
1635 | } | |
1636 | ||
1637 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); | |
1638 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1639 | vxh->vx_vni = vni; | |
1640 | ||
1641 | __skb_push(skb, sizeof(*uh)); | |
1642 | skb_reset_transport_header(skb); | |
1643 | uh = udp_hdr(skb); | |
1644 | ||
1645 | uh->dest = dst_port; | |
1646 | uh->source = src_port; | |
1647 | ||
1648 | uh->len = htons(skb->len); | |
e4c7ed41 CW |
1649 | |
1650 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); | |
1651 | IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | | |
1652 | IPSKB_REROUTED); | |
e4c7ed41 CW |
1653 | skb_dst_set(skb, dst); |
1654 | ||
359a0ea9 TH |
1655 | udp6_set_csum(udp_get_no_check6_tx(vs->sock->sk), skb, |
1656 | saddr, daddr, skb->len); | |
e4c7ed41 CW |
1657 | |
1658 | __skb_push(skb, sizeof(*ip6h)); | |
1659 | skb_reset_network_header(skb); | |
1660 | ip6h = ipv6_hdr(skb); | |
1661 | ip6h->version = 6; | |
1662 | ip6h->priority = prio; | |
1663 | ip6h->flow_lbl[0] = 0; | |
1664 | ip6h->flow_lbl[1] = 0; | |
1665 | ip6h->flow_lbl[2] = 0; | |
1666 | ip6h->payload_len = htons(skb->len); | |
1667 | ip6h->nexthdr = IPPROTO_UDP; | |
1668 | ip6h->hop_limit = ttl; | |
1669 | ip6h->daddr = *daddr; | |
1670 | ip6h->saddr = *saddr; | |
1671 | ||
e4c7ed41 CW |
1672 | ip6tunnel_xmit(skb, dev); |
1673 | return 0; | |
1674 | } | |
1675 | #endif | |
1676 | ||
11796187 | 1677 | int vxlan_xmit_skb(struct vxlan_sock *vs, |
49560532 PS |
1678 | struct rtable *rt, struct sk_buff *skb, |
1679 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, | |
f01ec1c0 | 1680 | __be16 src_port, __be16 dst_port, __be32 vni, bool xnet) |
49560532 PS |
1681 | { |
1682 | struct vxlanhdr *vxh; | |
1683 | struct udphdr *uh; | |
649c5b8b | 1684 | int min_headroom; |
49560532 PS |
1685 | int err; |
1686 | ||
359a0ea9 TH |
1687 | skb = vxlan_handle_offloads(skb, !vs->sock->sk->sk_no_check_tx); |
1688 | if (IS_ERR(skb)) | |
1689 | return -EINVAL; | |
49560532 | 1690 | |
649c5b8b | 1691 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 PS |
1692 | + VXLAN_HLEN + sizeof(struct iphdr) |
1693 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
649c5b8b PS |
1694 | |
1695 | /* Need space for new headers (invalidates iph ptr) */ | |
1696 | err = skb_cow_head(skb, min_headroom); | |
1697 | if (unlikely(err)) | |
1698 | return err; | |
1699 | ||
1eaa8178 PS |
1700 | if (vlan_tx_tag_present(skb)) { |
1701 | if (WARN_ON(!__vlan_put_tag(skb, | |
1702 | skb->vlan_proto, | |
1703 | vlan_tx_tag_get(skb)))) | |
1704 | return -ENOMEM; | |
1705 | ||
1706 | skb->vlan_tci = 0; | |
1707 | } | |
1708 | ||
49560532 PS |
1709 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
1710 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1711 | vxh->vx_vni = vni; | |
1712 | ||
1713 | __skb_push(skb, sizeof(*uh)); | |
1714 | skb_reset_transport_header(skb); | |
1715 | uh = udp_hdr(skb); | |
1716 | ||
1717 | uh->dest = dst_port; | |
1718 | uh->source = src_port; | |
1719 | ||
1720 | uh->len = htons(skb->len); | |
49560532 | 1721 | |
359a0ea9 TH |
1722 | udp_set_csum(vs->sock->sk->sk_no_check_tx, skb, |
1723 | src, dst, skb->len); | |
49560532 | 1724 | |
aad88724 | 1725 | return iptunnel_xmit(vs->sock->sk, rt, skb, src, dst, IPPROTO_UDP, |
f01ec1c0 | 1726 | tos, ttl, df, xnet); |
49560532 PS |
1727 | } |
1728 | EXPORT_SYMBOL_GPL(vxlan_xmit_skb); | |
1729 | ||
9dcc71e1 SS |
1730 | /* Bypass encapsulation if the destination is local */ |
1731 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1732 | struct vxlan_dev *dst_vxlan) | |
1733 | { | |
8f84985f | 1734 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1735 | union vxlan_addr loopback; |
1736 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
9dcc71e1 | 1737 | |
8f84985f LR |
1738 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1739 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1740 | skb->pkt_type = PACKET_HOST; |
1741 | skb->encapsulation = 0; | |
1742 | skb->dev = dst_vxlan->dev; | |
1743 | __skb_pull(skb, skb_network_offset(skb)); | |
1744 | ||
e4c7ed41 CW |
1745 | if (remote_ip->sa.sa_family == AF_INET) { |
1746 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1747 | loopback.sa.sa_family = AF_INET; | |
1748 | #if IS_ENABLED(CONFIG_IPV6) | |
1749 | } else { | |
1750 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1751 | loopback.sa.sa_family = AF_INET6; | |
1752 | #endif | |
1753 | } | |
1754 | ||
9dcc71e1 | 1755 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1756 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1757 | |
1758 | u64_stats_update_begin(&tx_stats->syncp); | |
1759 | tx_stats->tx_packets++; | |
1760 | tx_stats->tx_bytes += skb->len; | |
1761 | u64_stats_update_end(&tx_stats->syncp); | |
1762 | ||
1763 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1764 | u64_stats_update_begin(&rx_stats->syncp); | |
1765 | rx_stats->rx_packets++; | |
1766 | rx_stats->rx_bytes += skb->len; | |
1767 | u64_stats_update_end(&rx_stats->syncp); | |
1768 | } else { | |
1769 | skb->dev->stats.rx_dropped++; | |
1770 | } | |
1771 | } | |
1772 | ||
4ad16930 SH |
1773 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1774 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1775 | { |
1776 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
e4c7ed41 | 1777 | struct rtable *rt = NULL; |
d342894c | 1778 | const struct iphdr *old_iph; |
d342894c | 1779 | struct flowi4 fl4; |
e4c7ed41 CW |
1780 | union vxlan_addr *dst; |
1781 | __be16 src_port = 0, dst_port; | |
234f5b73 | 1782 | u32 vni; |
d342894c | 1783 | __be16 df = 0; |
1784 | __u8 tos, ttl; | |
0e6fbc5b | 1785 | int err; |
d342894c | 1786 | |
823aa873 | 1787 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; |
6681712d | 1788 | vni = rdst->remote_vni; |
e4c7ed41 | 1789 | dst = &rdst->remote_ip; |
e4f67add | 1790 | |
e4c7ed41 | 1791 | if (vxlan_addr_any(dst)) { |
e4f67add | 1792 | if (did_rsc) { |
e4f67add | 1793 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1794 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1795 | return; |
e4f67add | 1796 | } |
ef59febe | 1797 | goto drop; |
e4f67add | 1798 | } |
ef59febe | 1799 | |
d342894c | 1800 | old_iph = ip_hdr(skb); |
1801 | ||
d342894c | 1802 | ttl = vxlan->ttl; |
e4c7ed41 | 1803 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1804 | ttl = 1; |
1805 | ||
1806 | tos = vxlan->tos; | |
1807 | if (tos == 1) | |
206aaafc | 1808 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1809 | |
49560532 | 1810 | src_port = vxlan_src_port(vxlan->port_min, vxlan->port_max, skb); |
d342894c | 1811 | |
e4c7ed41 CW |
1812 | if (dst->sa.sa_family == AF_INET) { |
1813 | memset(&fl4, 0, sizeof(fl4)); | |
1814 | fl4.flowi4_oif = rdst->remote_ifindex; | |
1815 | fl4.flowi4_tos = RT_TOS(tos); | |
1816 | fl4.daddr = dst->sin.sin_addr.s_addr; | |
1817 | fl4.saddr = vxlan->saddr.sin.sin_addr.s_addr; | |
1818 | ||
f01ec1c0 | 1819 | rt = ip_route_output_key(vxlan->net, &fl4); |
e4c7ed41 CW |
1820 | if (IS_ERR(rt)) { |
1821 | netdev_dbg(dev, "no route to %pI4\n", | |
1822 | &dst->sin.sin_addr.s_addr); | |
1823 | dev->stats.tx_carrier_errors++; | |
1824 | goto tx_error; | |
1825 | } | |
d342894c | 1826 | |
e4c7ed41 CW |
1827 | if (rt->dst.dev == dev) { |
1828 | netdev_dbg(dev, "circular route to %pI4\n", | |
1829 | &dst->sin.sin_addr.s_addr); | |
1830 | dev->stats.collisions++; | |
fffc15a5 | 1831 | goto rt_tx_error; |
e4c7ed41 CW |
1832 | } |
1833 | ||
1834 | /* Bypass encapsulation if the destination is local */ | |
1835 | if (rt->rt_flags & RTCF_LOCAL && | |
1836 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1837 | struct vxlan_dev *dst_vxlan; | |
1838 | ||
1839 | ip_rt_put(rt); | |
f01ec1c0 | 1840 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, dst_port); |
e4c7ed41 CW |
1841 | if (!dst_vxlan) |
1842 | goto tx_error; | |
1843 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1844 | return; | |
1845 | } | |
1846 | ||
1847 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); | |
1848 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
d342894c | 1849 | |
11796187 | 1850 | err = vxlan_xmit_skb(vxlan->vn_sock, rt, skb, |
e4c7ed41 CW |
1851 | fl4.saddr, dst->sin.sin_addr.s_addr, |
1852 | tos, ttl, df, src_port, dst_port, | |
f01ec1c0 ND |
1853 | htonl(vni << 8), |
1854 | !net_eq(vxlan->net, dev_net(vxlan->dev))); | |
9dcc71e1 | 1855 | |
e4c7ed41 CW |
1856 | if (err < 0) |
1857 | goto rt_tx_error; | |
1858 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
1859 | #if IS_ENABLED(CONFIG_IPV6) | |
1860 | } else { | |
1861 | struct sock *sk = vxlan->vn_sock->sock->sk; | |
1862 | struct dst_entry *ndst; | |
1863 | struct flowi6 fl6; | |
1864 | u32 flags; | |
1865 | ||
1866 | memset(&fl6, 0, sizeof(fl6)); | |
1867 | fl6.flowi6_oif = rdst->remote_ifindex; | |
1868 | fl6.daddr = dst->sin6.sin6_addr; | |
1869 | fl6.saddr = vxlan->saddr.sin6.sin6_addr; | |
8c1bb79f | 1870 | fl6.flowi6_proto = IPPROTO_UDP; |
e4c7ed41 CW |
1871 | |
1872 | if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) { | |
1873 | netdev_dbg(dev, "no route to %pI6\n", | |
1874 | &dst->sin6.sin6_addr); | |
1875 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 1876 | goto tx_error; |
e4c7ed41 | 1877 | } |
d342894c | 1878 | |
e4c7ed41 CW |
1879 | if (ndst->dev == dev) { |
1880 | netdev_dbg(dev, "circular route to %pI6\n", | |
1881 | &dst->sin6.sin6_addr); | |
1882 | dst_release(ndst); | |
1883 | dev->stats.collisions++; | |
1884 | goto tx_error; | |
1885 | } | |
0e6fbc5b | 1886 | |
e4c7ed41 CW |
1887 | /* Bypass encapsulation if the destination is local */ |
1888 | flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
1889 | if (flags & RTF_LOCAL && | |
1890 | !(flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1891 | struct vxlan_dev *dst_vxlan; | |
1892 | ||
1893 | dst_release(ndst); | |
f01ec1c0 | 1894 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, dst_port); |
e4c7ed41 CW |
1895 | if (!dst_vxlan) |
1896 | goto tx_error; | |
1897 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1898 | return; | |
1899 | } | |
49560532 | 1900 | |
e4c7ed41 CW |
1901 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
1902 | ||
11796187 | 1903 | err = vxlan6_xmit_skb(vxlan->vn_sock, ndst, skb, |
e4c7ed41 | 1904 | dev, &fl6.saddr, &fl6.daddr, 0, ttl, |
f01ec1c0 ND |
1905 | src_port, dst_port, htonl(vni << 8), |
1906 | !net_eq(vxlan->net, dev_net(vxlan->dev))); | |
e4c7ed41 CW |
1907 | #endif |
1908 | } | |
0e6fbc5b | 1909 | |
4ad16930 | 1910 | return; |
d342894c | 1911 | |
1912 | drop: | |
1913 | dev->stats.tx_dropped++; | |
1914 | goto tx_free; | |
1915 | ||
49560532 PS |
1916 | rt_tx_error: |
1917 | ip_rt_put(rt); | |
d342894c | 1918 | tx_error: |
1919 | dev->stats.tx_errors++; | |
1920 | tx_free: | |
1921 | dev_kfree_skb(skb); | |
d342894c | 1922 | } |
1923 | ||
6681712d DS |
1924 | /* Transmit local packets over Vxlan |
1925 | * | |
1926 | * Outer IP header inherits ECN and DF from inner header. | |
1927 | * Outer UDP destination is the VXLAN assigned port. | |
1928 | * source port is based on hash of flow | |
1929 | */ | |
1930 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
1931 | { | |
1932 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1933 | struct ethhdr *eth; | |
1934 | bool did_rsc = false; | |
8f646c92 | 1935 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 1936 | struct vxlan_fdb *f; |
6681712d DS |
1937 | |
1938 | skb_reset_mac_header(skb); | |
1939 | eth = eth_hdr(skb); | |
1940 | ||
f564f45c CW |
1941 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
1942 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
1943 | return arp_reduce(dev, skb); | |
1944 | #if IS_ENABLED(CONFIG_IPV6) | |
1945 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
1946 | skb->len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) && | |
1947 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { | |
1948 | struct nd_msg *msg; | |
1949 | ||
1950 | msg = (struct nd_msg *)skb_transport_header(skb); | |
1951 | if (msg->icmph.icmp6_code == 0 && | |
1952 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
1953 | return neigh_reduce(dev, skb); | |
1954 | } | |
1955 | #endif | |
1956 | } | |
6681712d DS |
1957 | |
1958 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
ae884082 DS |
1959 | did_rsc = false; |
1960 | ||
1961 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
1962 | (ntohs(eth->h_proto) == ETH_P_IP || |
1963 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
1964 | did_rsc = route_shortcircuit(dev, skb); |
1965 | if (did_rsc) | |
1966 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
1967 | } | |
1968 | ||
6681712d | 1969 | if (f == NULL) { |
afbd8bae MR |
1970 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
1971 | if (f == NULL) { | |
1972 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
1973 | !is_multicast_ether_addr(eth->h_dest)) | |
1974 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
1975 | ||
1976 | dev->stats.tx_dropped++; | |
8f646c92 | 1977 | kfree_skb(skb); |
afbd8bae MR |
1978 | return NETDEV_TX_OK; |
1979 | } | |
1980 | } | |
6681712d | 1981 | |
afbd8bae MR |
1982 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
1983 | struct sk_buff *skb1; | |
6681712d | 1984 | |
8f646c92 ED |
1985 | if (!fdst) { |
1986 | fdst = rdst; | |
1987 | continue; | |
1988 | } | |
afbd8bae MR |
1989 | skb1 = skb_clone(skb, GFP_ATOMIC); |
1990 | if (skb1) | |
1991 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
1992 | } |
1993 | ||
8f646c92 ED |
1994 | if (fdst) |
1995 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
1996 | else | |
1997 | kfree_skb(skb); | |
4ad16930 | 1998 | return NETDEV_TX_OK; |
6681712d DS |
1999 | } |
2000 | ||
d342894c | 2001 | /* Walk the forwarding table and purge stale entries */ |
2002 | static void vxlan_cleanup(unsigned long arg) | |
2003 | { | |
2004 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2005 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2006 | unsigned int h; | |
2007 | ||
2008 | if (!netif_running(vxlan->dev)) | |
2009 | return; | |
2010 | ||
2011 | spin_lock_bh(&vxlan->hash_lock); | |
2012 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2013 | struct hlist_node *p, *n; | |
2014 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2015 | struct vxlan_fdb *f | |
2016 | = container_of(p, struct vxlan_fdb, hlist); | |
2017 | unsigned long timeout; | |
2018 | ||
3c172868 | 2019 | if (f->state & NUD_PERMANENT) |
d342894c | 2020 | continue; |
2021 | ||
2022 | timeout = f->used + vxlan->age_interval * HZ; | |
2023 | if (time_before_eq(timeout, jiffies)) { | |
2024 | netdev_dbg(vxlan->dev, | |
2025 | "garbage collect %pM\n", | |
2026 | f->eth_addr); | |
2027 | f->state = NUD_STALE; | |
2028 | vxlan_fdb_destroy(vxlan, f); | |
2029 | } else if (time_before(timeout, next_timer)) | |
2030 | next_timer = timeout; | |
2031 | } | |
2032 | } | |
2033 | spin_unlock_bh(&vxlan->hash_lock); | |
2034 | ||
2035 | mod_timer(&vxlan->age_timer, next_timer); | |
2036 | } | |
2037 | ||
9c2e24e1 PS |
2038 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2039 | { | |
2040 | __u32 vni = vxlan->default_dst.remote_vni; | |
2041 | ||
2042 | vxlan->vn_sock = vs; | |
2043 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); | |
2044 | } | |
2045 | ||
d342894c | 2046 | /* Setup stats when device is created */ |
2047 | static int vxlan_init(struct net_device *dev) | |
2048 | { | |
1c51a915 | 2049 | struct vxlan_dev *vxlan = netdev_priv(dev); |
f01ec1c0 | 2050 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2051 | struct vxlan_sock *vs; |
1c51a915 | 2052 | |
1c213bd2 | 2053 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2054 | if (!dev->tstats) |
d342894c | 2055 | return -ENOMEM; |
2056 | ||
1c51a915 | 2057 | spin_lock(&vn->sock_lock); |
f01ec1c0 | 2058 | vs = vxlan_find_sock(vxlan->net, vxlan->dst_port); |
1c51a915 SH |
2059 | if (vs) { |
2060 | /* If we have a socket with same port already, reuse it */ | |
2061 | atomic_inc(&vs->refcnt); | |
9c2e24e1 | 2062 | vxlan_vs_add_dev(vs, vxlan); |
1c51a915 SH |
2063 | } else { |
2064 | /* otherwise make new socket outside of RTNL */ | |
2065 | dev_hold(dev); | |
2066 | queue_work(vxlan_wq, &vxlan->sock_work); | |
2067 | } | |
2068 | spin_unlock(&vn->sock_lock); | |
2069 | ||
d342894c | 2070 | return 0; |
2071 | } | |
2072 | ||
ba609e9b | 2073 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2074 | { |
2075 | struct vxlan_fdb *f; | |
2076 | ||
2077 | spin_lock_bh(&vxlan->hash_lock); | |
2078 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2079 | if (f) | |
2080 | vxlan_fdb_destroy(vxlan, f); | |
2081 | spin_unlock_bh(&vxlan->hash_lock); | |
2082 | } | |
2083 | ||
ebf4063e SH |
2084 | static void vxlan_uninit(struct net_device *dev) |
2085 | { | |
2086 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e SH |
2087 | struct vxlan_sock *vs = vxlan->vn_sock; |
2088 | ||
ba609e9b | 2089 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2090 | |
ebf4063e | 2091 | if (vs) |
012a5729 | 2092 | vxlan_sock_release(vs); |
ebf4063e SH |
2093 | free_percpu(dev->tstats); |
2094 | } | |
2095 | ||
d342894c | 2096 | /* Start ageing timer and join group when device is brought up */ |
2097 | static int vxlan_open(struct net_device *dev) | |
2098 | { | |
2099 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1c51a915 SH |
2100 | struct vxlan_sock *vs = vxlan->vn_sock; |
2101 | ||
2102 | /* socket hasn't been created */ | |
2103 | if (!vs) | |
2104 | return -ENOTCONN; | |
d342894c | 2105 | |
79d4a94f | 2106 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
1c51a915 | 2107 | vxlan_sock_hold(vs); |
7c47cedf | 2108 | dev_hold(dev); |
3fc2de2f | 2109 | queue_work(vxlan_wq, &vxlan->igmp_join); |
d342894c | 2110 | } |
2111 | ||
2112 | if (vxlan->age_interval) | |
2113 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
2114 | ||
2115 | return 0; | |
2116 | } | |
2117 | ||
2118 | /* Purge the forwarding table */ | |
2119 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2120 | { | |
31fec5aa | 2121 | unsigned int h; |
d342894c | 2122 | |
2123 | spin_lock_bh(&vxlan->hash_lock); | |
2124 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2125 | struct hlist_node *p, *n; | |
2126 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2127 | struct vxlan_fdb *f | |
2128 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2129 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2130 | if (!is_zero_ether_addr(f->eth_addr)) | |
2131 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2132 | } |
2133 | } | |
2134 | spin_unlock_bh(&vxlan->hash_lock); | |
2135 | } | |
2136 | ||
2137 | /* Cleanup timer and forwarding table on shutdown */ | |
2138 | static int vxlan_stop(struct net_device *dev) | |
2139 | { | |
2140 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2141 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2142 | struct vxlan_sock *vs = vxlan->vn_sock; |
d342894c | 2143 | |
e4c7ed41 | 2144 | if (vs && vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
95ab0991 | 2145 | !vxlan_group_used(vn, vxlan)) { |
1c51a915 | 2146 | vxlan_sock_hold(vs); |
7c47cedf | 2147 | dev_hold(dev); |
3fc2de2f | 2148 | queue_work(vxlan_wq, &vxlan->igmp_leave); |
7c47cedf | 2149 | } |
d342894c | 2150 | |
2151 | del_timer_sync(&vxlan->age_timer); | |
2152 | ||
2153 | vxlan_flush(vxlan); | |
2154 | ||
2155 | return 0; | |
2156 | } | |
2157 | ||
d342894c | 2158 | /* Stub, nothing needs to be done. */ |
2159 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2160 | { | |
2161 | } | |
2162 | ||
345010b5 DB |
2163 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2164 | { | |
2165 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2166 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2167 | struct net_device *lowerdev; | |
2168 | int max_mtu; | |
2169 | ||
f01ec1c0 | 2170 | lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex); |
345010b5 DB |
2171 | if (lowerdev == NULL) |
2172 | return eth_change_mtu(dev, new_mtu); | |
2173 | ||
2174 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
2175 | max_mtu = lowerdev->mtu - VXLAN6_HEADROOM; | |
2176 | else | |
2177 | max_mtu = lowerdev->mtu - VXLAN_HEADROOM; | |
2178 | ||
2179 | if (new_mtu < 68 || new_mtu > max_mtu) | |
2180 | return -EINVAL; | |
2181 | ||
2182 | dev->mtu = new_mtu; | |
2183 | return 0; | |
2184 | } | |
2185 | ||
d342894c | 2186 | static const struct net_device_ops vxlan_netdev_ops = { |
2187 | .ndo_init = vxlan_init, | |
ebf4063e | 2188 | .ndo_uninit = vxlan_uninit, |
d342894c | 2189 | .ndo_open = vxlan_open, |
2190 | .ndo_stop = vxlan_stop, | |
2191 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2192 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2193 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2194 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2195 | .ndo_validate_addr = eth_validate_addr, |
2196 | .ndo_set_mac_address = eth_mac_addr, | |
2197 | .ndo_fdb_add = vxlan_fdb_add, | |
2198 | .ndo_fdb_del = vxlan_fdb_delete, | |
2199 | .ndo_fdb_dump = vxlan_fdb_dump, | |
2200 | }; | |
2201 | ||
2202 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2203 | static struct device_type vxlan_type = { | |
2204 | .name = "vxlan", | |
2205 | }; | |
2206 | ||
53cf5275 | 2207 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2208 | * supply the listening VXLAN udp ports. Callers are expected |
2209 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2210 | */ |
2211 | void vxlan_get_rx_port(struct net_device *dev) | |
2212 | { | |
2213 | struct vxlan_sock *vs; | |
2214 | struct net *net = dev_net(dev); | |
2215 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2216 | sa_family_t sa_family; | |
35e42379 JG |
2217 | __be16 port; |
2218 | unsigned int i; | |
53cf5275 JG |
2219 | |
2220 | spin_lock(&vn->sock_lock); | |
2221 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2222 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2223 | port = inet_sk(vs->sock->sk)->inet_sport; | |
53cf5275 JG |
2224 | sa_family = vs->sock->sk->sk_family; |
2225 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
2226 | port); | |
2227 | } | |
2228 | } | |
2229 | spin_unlock(&vn->sock_lock); | |
2230 | } | |
2231 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2232 | ||
d342894c | 2233 | /* Initialize the device structure. */ |
2234 | static void vxlan_setup(struct net_device *dev) | |
2235 | { | |
2236 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2237 | unsigned int h; |
05f47d69 | 2238 | int low, high; |
d342894c | 2239 | |
2240 | eth_hw_addr_random(dev); | |
2241 | ether_setup(dev); | |
e4c7ed41 | 2242 | if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6) |
2853af6a | 2243 | dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM; |
e4c7ed41 | 2244 | else |
2853af6a | 2245 | dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM; |
d342894c | 2246 | |
2247 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 2248 | dev->destructor = free_netdev; |
d342894c | 2249 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2250 | ||
2251 | dev->tx_queue_len = 0; | |
2252 | dev->features |= NETIF_F_LLTX; | |
d6727fe3 | 2253 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2254 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2255 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2256 | |
1eaa8178 PS |
2257 | dev->vlan_features = dev->features; |
2258 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2259 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2260 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2261 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
d342894c | 2262 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
6602d007 | 2263 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 2264 | |
553675fb | 2265 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2266 | spin_lock_init(&vxlan->hash_lock); |
3fc2de2f | 2267 | INIT_WORK(&vxlan->igmp_join, vxlan_igmp_join); |
2268 | INIT_WORK(&vxlan->igmp_leave, vxlan_igmp_leave); | |
1c51a915 | 2269 | INIT_WORK(&vxlan->sock_work, vxlan_sock_work); |
d342894c | 2270 | |
2271 | init_timer_deferrable(&vxlan->age_timer); | |
2272 | vxlan->age_timer.function = vxlan_cleanup; | |
2273 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2274 | ||
0bbf87d8 | 2275 | inet_get_local_port_range(dev_net(dev), &low, &high); |
05f47d69 | 2276 | vxlan->port_min = low; |
2277 | vxlan->port_max = high; | |
823aa873 | 2278 | vxlan->dst_port = htons(vxlan_port); |
05f47d69 | 2279 | |
d342894c | 2280 | vxlan->dev = dev; |
2281 | ||
2282 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
2283 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2284 | } | |
2285 | ||
2286 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
2287 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2288 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2289 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2290 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2291 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2292 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2293 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2294 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
2295 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
2296 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2297 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2298 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2299 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2300 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2301 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2302 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
823aa873 | 2303 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
d342894c | 2304 | }; |
2305 | ||
2306 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2307 | { | |
2308 | if (tb[IFLA_ADDRESS]) { | |
2309 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2310 | pr_debug("invalid link address (not ethernet)\n"); | |
2311 | return -EINVAL; | |
2312 | } | |
2313 | ||
2314 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2315 | pr_debug("invalid all zero ethernet address\n"); | |
2316 | return -EADDRNOTAVAIL; | |
2317 | } | |
2318 | } | |
2319 | ||
2320 | if (!data) | |
2321 | return -EINVAL; | |
2322 | ||
2323 | if (data[IFLA_VXLAN_ID]) { | |
2324 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2325 | if (id >= VXLAN_VID_MASK) | |
2326 | return -ERANGE; | |
2327 | } | |
2328 | ||
05f47d69 | 2329 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2330 | const struct ifla_vxlan_port_range *p | |
2331 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2332 | ||
2333 | if (ntohs(p->high) < ntohs(p->low)) { | |
2334 | pr_debug("port range %u .. %u not valid\n", | |
2335 | ntohs(p->low), ntohs(p->high)); | |
2336 | return -EINVAL; | |
2337 | } | |
2338 | } | |
2339 | ||
d342894c | 2340 | return 0; |
2341 | } | |
2342 | ||
1b13c97f YB |
2343 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2344 | struct ethtool_drvinfo *drvinfo) | |
2345 | { | |
2346 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2347 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2348 | } | |
2349 | ||
2350 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2351 | .get_drvinfo = vxlan_get_drvinfo, | |
2352 | .get_link = ethtool_op_get_link, | |
2353 | }; | |
2354 | ||
553675fb | 2355 | static void vxlan_del_work(struct work_struct *work) |
2356 | { | |
2357 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
2358 | ||
2359 | sk_release_kernel(vs->sock->sk); | |
2360 | kfree_rcu(vs, rcu); | |
2361 | } | |
2362 | ||
e4c7ed41 CW |
2363 | #if IS_ENABLED(CONFIG_IPV6) |
2364 | /* Create UDP socket for encapsulation receive. AF_INET6 socket | |
2365 | * could be used for both IPv4 and IPv6 communications, but | |
2366 | * users may set bindv6only=1. | |
2367 | */ | |
359a0ea9 | 2368 | static struct socket *create_v6_sock(struct net *net, __be16 port, u32 flags) |
553675fb | 2369 | { |
553675fb | 2370 | struct sock *sk; |
e4c7ed41 CW |
2371 | struct socket *sock; |
2372 | struct sockaddr_in6 vxlan_addr = { | |
2373 | .sin6_family = AF_INET6, | |
2374 | .sin6_port = port, | |
2375 | }; | |
2376 | int rc, val = 1; | |
2377 | ||
2378 | rc = sock_create_kern(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock); | |
2379 | if (rc < 0) { | |
2380 | pr_debug("UDPv6 socket create failed\n"); | |
39deb2c7 | 2381 | return ERR_PTR(rc); |
e4c7ed41 CW |
2382 | } |
2383 | ||
2384 | /* Put in proper namespace */ | |
2385 | sk = sock->sk; | |
2386 | sk_change_net(sk, net); | |
2387 | ||
2388 | kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY, | |
2389 | (char *)&val, sizeof(val)); | |
2390 | rc = kernel_bind(sock, (struct sockaddr *)&vxlan_addr, | |
2391 | sizeof(struct sockaddr_in6)); | |
2392 | if (rc < 0) { | |
2393 | pr_debug("bind for UDPv6 socket %pI6:%u (%d)\n", | |
2394 | &vxlan_addr.sin6_addr, ntohs(vxlan_addr.sin6_port), rc); | |
2395 | sk_release_kernel(sk); | |
39deb2c7 | 2396 | return ERR_PTR(rc); |
e4c7ed41 CW |
2397 | } |
2398 | /* At this point, IPv6 module should have been loaded in | |
2399 | * sock_create_kern(). | |
2400 | */ | |
2401 | BUG_ON(!ipv6_stub); | |
2402 | ||
e4c7ed41 CW |
2403 | /* Disable multicast loopback */ |
2404 | inet_sk(sk)->mc_loop = 0; | |
359a0ea9 TH |
2405 | |
2406 | if (flags & VXLAN_F_UDP_ZERO_CSUM6_TX) | |
2407 | udp_set_no_check6_tx(sk, true); | |
2408 | ||
2409 | if (flags & VXLAN_F_UDP_ZERO_CSUM6_RX) | |
2410 | udp_set_no_check6_rx(sk, true); | |
2411 | ||
39deb2c7 | 2412 | return sock; |
e4c7ed41 CW |
2413 | } |
2414 | ||
2415 | #else | |
2416 | ||
359a0ea9 | 2417 | static struct socket *create_v6_sock(struct net *net, __be16 port, u32 flags) |
e4c7ed41 | 2418 | { |
39deb2c7 | 2419 | return ERR_PTR(-EPFNOSUPPORT); |
e4c7ed41 CW |
2420 | } |
2421 | #endif | |
2422 | ||
359a0ea9 | 2423 | static struct socket *create_v4_sock(struct net *net, __be16 port, u32 flags) |
e4c7ed41 CW |
2424 | { |
2425 | struct sock *sk; | |
2426 | struct socket *sock; | |
553675fb | 2427 | struct sockaddr_in vxlan_addr = { |
2428 | .sin_family = AF_INET, | |
2429 | .sin_addr.s_addr = htonl(INADDR_ANY), | |
bb3fd687 | 2430 | .sin_port = port, |
553675fb | 2431 | }; |
2432 | int rc; | |
553675fb | 2433 | |
2434 | /* Create UDP socket for encapsulation receive. */ | |
e4c7ed41 | 2435 | rc = sock_create_kern(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock); |
553675fb | 2436 | if (rc < 0) { |
2437 | pr_debug("UDP socket create failed\n"); | |
39deb2c7 | 2438 | return ERR_PTR(rc); |
553675fb | 2439 | } |
2440 | ||
2441 | /* Put in proper namespace */ | |
e4c7ed41 | 2442 | sk = sock->sk; |
553675fb | 2443 | sk_change_net(sk, net); |
2444 | ||
e4c7ed41 | 2445 | rc = kernel_bind(sock, (struct sockaddr *) &vxlan_addr, |
553675fb | 2446 | sizeof(vxlan_addr)); |
2447 | if (rc < 0) { | |
2448 | pr_debug("bind for UDP socket %pI4:%u (%d)\n", | |
2449 | &vxlan_addr.sin_addr, ntohs(vxlan_addr.sin_port), rc); | |
2450 | sk_release_kernel(sk); | |
39deb2c7 | 2451 | return ERR_PTR(rc); |
e4c7ed41 CW |
2452 | } |
2453 | ||
e4c7ed41 CW |
2454 | /* Disable multicast loopback */ |
2455 | inet_sk(sk)->mc_loop = 0; | |
359a0ea9 TH |
2456 | |
2457 | if (!(flags & VXLAN_F_UDP_CSUM)) | |
2458 | sock->sk->sk_no_check_tx = 1; | |
2459 | ||
39deb2c7 | 2460 | return sock; |
e4c7ed41 CW |
2461 | } |
2462 | ||
2463 | /* Create new listen socket if needed */ | |
2464 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, | |
359a0ea9 TH |
2465 | vxlan_rcv_t *rcv, void *data, |
2466 | u32 flags) | |
e4c7ed41 CW |
2467 | { |
2468 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2469 | struct vxlan_sock *vs; | |
2470 | struct socket *sock; | |
2471 | struct sock *sk; | |
e4c7ed41 | 2472 | unsigned int h; |
359a0ea9 | 2473 | bool ipv6 = !!(flags & VXLAN_F_IPV6); |
e4c7ed41 | 2474 | |
dc01e7d3 | 2475 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2476 | if (!vs) |
2477 | return ERR_PTR(-ENOMEM); | |
2478 | ||
2479 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2480 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2481 | ||
2482 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2483 | ||
2484 | if (ipv6) | |
359a0ea9 | 2485 | sock = create_v6_sock(net, port, flags); |
e4c7ed41 | 2486 | else |
359a0ea9 | 2487 | sock = create_v4_sock(net, port, flags); |
39deb2c7 | 2488 | if (IS_ERR(sock)) { |
553675fb | 2489 | kfree(vs); |
e50fddc8 | 2490 | return ERR_CAST(sock); |
553675fb | 2491 | } |
e4c7ed41 CW |
2492 | |
2493 | vs->sock = sock; | |
2494 | sk = sock->sk; | |
9c2e24e1 | 2495 | atomic_set(&vs->refcnt, 1); |
5cfccc5a | 2496 | vs->rcv = rcv; |
012a5729 | 2497 | vs->data = data; |
559835ea | 2498 | rcu_assign_sk_user_data(vs->sock->sk, vs); |
553675fb | 2499 | |
dc01e7d3 OG |
2500 | /* Initialize the vxlan udp offloads structure */ |
2501 | vs->udp_offloads.port = port; | |
2502 | vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive; | |
2503 | vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete; | |
2504 | ||
9c2e24e1 PS |
2505 | spin_lock(&vn->sock_lock); |
2506 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2507 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2508 | spin_unlock(&vn->sock_lock); |
553675fb | 2509 | |
2510 | /* Mark socket as an encapsulation socket. */ | |
2511 | udp_sk(sk)->encap_type = 1; | |
2512 | udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; | |
e4c7ed41 CW |
2513 | #if IS_ENABLED(CONFIG_IPV6) |
2514 | if (ipv6) | |
2515 | ipv6_stub->udpv6_encap_enable(); | |
2516 | else | |
2517 | #endif | |
2518 | udp_encap_enable(); | |
2519 | ||
9c2e24e1 PS |
2520 | return vs; |
2521 | } | |
2522 | ||
012a5729 PS |
2523 | struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
2524 | vxlan_rcv_t *rcv, void *data, | |
359a0ea9 | 2525 | bool no_share, u32 flags) |
9c2e24e1 PS |
2526 | { |
2527 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2528 | struct vxlan_sock *vs; | |
2529 | ||
359a0ea9 | 2530 | vs = vxlan_socket_create(net, port, rcv, data, flags); |
9c2e24e1 PS |
2531 | if (!IS_ERR(vs)) |
2532 | return vs; | |
553675fb | 2533 | |
012a5729 PS |
2534 | if (no_share) /* Return error if sharing is not allowed. */ |
2535 | return vs; | |
2536 | ||
9c2e24e1 PS |
2537 | spin_lock(&vn->sock_lock); |
2538 | vs = vxlan_find_sock(net, port); | |
5cfccc5a PS |
2539 | if (vs) { |
2540 | if (vs->rcv == rcv) | |
2541 | atomic_inc(&vs->refcnt); | |
2542 | else | |
2543 | vs = ERR_PTR(-EBUSY); | |
2544 | } | |
2545 | spin_unlock(&vn->sock_lock); | |
2546 | ||
2547 | if (!vs) | |
9c2e24e1 PS |
2548 | vs = ERR_PTR(-EINVAL); |
2549 | ||
553675fb | 2550 | return vs; |
2551 | } | |
012a5729 | 2552 | EXPORT_SYMBOL_GPL(vxlan_sock_add); |
553675fb | 2553 | |
1c51a915 SH |
2554 | /* Scheduled at device creation to bind to a socket */ |
2555 | static void vxlan_sock_work(struct work_struct *work) | |
2556 | { | |
9c2e24e1 | 2557 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, sock_work); |
f01ec1c0 | 2558 | struct net *net = vxlan->net; |
1c51a915 | 2559 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
9c2e24e1 PS |
2560 | __be16 port = vxlan->dst_port; |
2561 | struct vxlan_sock *nvs; | |
1c51a915 | 2562 | |
359a0ea9 | 2563 | nvs = vxlan_sock_add(net, port, vxlan_rcv, NULL, false, vxlan->flags); |
1c51a915 | 2564 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2565 | if (!IS_ERR(nvs)) |
2566 | vxlan_vs_add_dev(nvs, vxlan); | |
2567 | spin_unlock(&vn->sock_lock); | |
2568 | ||
2569 | dev_put(vxlan->dev); | |
1c51a915 SH |
2570 | } |
2571 | ||
d342894c | 2572 | static int vxlan_newlink(struct net *net, struct net_device *dev, |
2573 | struct nlattr *tb[], struct nlattr *data[]) | |
2574 | { | |
553675fb | 2575 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
d342894c | 2576 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 2577 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 2578 | __u32 vni; |
2579 | int err; | |
e4c7ed41 | 2580 | bool use_ipv6 = false; |
d342894c | 2581 | |
2582 | if (!data[IFLA_VXLAN_ID]) | |
2583 | return -EINVAL; | |
2584 | ||
f01ec1c0 ND |
2585 | vxlan->net = dev_net(dev); |
2586 | ||
d342894c | 2587 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); |
c7995c43 | 2588 | dst->remote_vni = vni; |
d342894c | 2589 | |
5933a7bb MR |
2590 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2591 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 CW |
2592 | if (data[IFLA_VXLAN_GROUP]) { |
2593 | dst->remote_ip.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
e4c7ed41 CW |
2594 | } else if (data[IFLA_VXLAN_GROUP6]) { |
2595 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2596 | return -EPFNOSUPPORT; | |
2597 | ||
2598 | nla_memcpy(&dst->remote_ip.sin6.sin6_addr, data[IFLA_VXLAN_GROUP6], | |
2599 | sizeof(struct in6_addr)); | |
2600 | dst->remote_ip.sa.sa_family = AF_INET6; | |
2601 | use_ipv6 = true; | |
2602 | } | |
d342894c | 2603 | |
e4c7ed41 CW |
2604 | if (data[IFLA_VXLAN_LOCAL]) { |
2605 | vxlan->saddr.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
2606 | vxlan->saddr.sa.sa_family = AF_INET; | |
2607 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2608 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2609 | return -EPFNOSUPPORT; | |
2610 | ||
2611 | /* TODO: respect scope id */ | |
2612 | nla_memcpy(&vxlan->saddr.sin6.sin6_addr, data[IFLA_VXLAN_LOCAL6], | |
2613 | sizeof(struct in6_addr)); | |
2614 | vxlan->saddr.sa.sa_family = AF_INET6; | |
2615 | use_ipv6 = true; | |
2616 | } | |
d342894c | 2617 | |
34e02aa1 | 2618 | if (data[IFLA_VXLAN_LINK] && |
c7995c43 | 2619 | (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { |
34e02aa1 | 2620 | struct net_device *lowerdev |
c7995c43 | 2621 | = __dev_get_by_index(net, dst->remote_ifindex); |
34e02aa1 | 2622 | |
2623 | if (!lowerdev) { | |
c7995c43 | 2624 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2625 | return -ENODEV; |
2626 | } | |
d342894c | 2627 | |
e4c7ed41 CW |
2628 | #if IS_ENABLED(CONFIG_IPV6) |
2629 | if (use_ipv6) { | |
2630 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2631 | if (idev && idev->cnf.disable_ipv6) { | |
2632 | pr_info("IPv6 is disabled via sysctl\n"); | |
2633 | return -EPERM; | |
2634 | } | |
2635 | vxlan->flags |= VXLAN_F_IPV6; | |
2636 | } | |
2637 | #endif | |
2638 | ||
34e02aa1 | 2639 | if (!tb[IFLA_MTU]) |
e4c7ed41 | 2640 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 | 2641 | |
2853af6a | 2642 | dev->needed_headroom = lowerdev->hard_header_len + |
e4c7ed41 | 2643 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
7bda701e | 2644 | } else if (use_ipv6) |
2645 | vxlan->flags |= VXLAN_F_IPV6; | |
d342894c | 2646 | |
2647 | if (data[IFLA_VXLAN_TOS]) | |
2648 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
2649 | ||
afb97186 VB |
2650 | if (data[IFLA_VXLAN_TTL]) |
2651 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
2652 | ||
d342894c | 2653 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 2654 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 2655 | |
2656 | if (data[IFLA_VXLAN_AGEING]) | |
2657 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
2658 | else | |
2659 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
2660 | ||
e4f67add DS |
2661 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
2662 | vxlan->flags |= VXLAN_F_PROXY; | |
2663 | ||
2664 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
2665 | vxlan->flags |= VXLAN_F_RSC; | |
2666 | ||
2667 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
2668 | vxlan->flags |= VXLAN_F_L2MISS; | |
2669 | ||
2670 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
2671 | vxlan->flags |= VXLAN_F_L3MISS; | |
2672 | ||
d342894c | 2673 | if (data[IFLA_VXLAN_LIMIT]) |
2674 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
2675 | ||
05f47d69 | 2676 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2677 | const struct ifla_vxlan_port_range *p | |
2678 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2679 | vxlan->port_min = ntohs(p->low); | |
2680 | vxlan->port_max = ntohs(p->high); | |
2681 | } | |
2682 | ||
823aa873 | 2683 | if (data[IFLA_VXLAN_PORT]) |
2684 | vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
2685 | ||
359a0ea9 TH |
2686 | if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) |
2687 | vxlan->flags |= VXLAN_F_UDP_CSUM; | |
2688 | ||
2689 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && | |
2690 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
2691 | vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; | |
2692 | ||
2693 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && | |
2694 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
2695 | vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; | |
2696 | ||
553675fb | 2697 | if (vxlan_find_vni(net, vni, vxlan->dst_port)) { |
2698 | pr_info("duplicate VNI %u\n", vni); | |
2699 | return -EEXIST; | |
2700 | } | |
2701 | ||
7ad24ea4 | 2702 | dev->ethtool_ops = &vxlan_ethtool_ops; |
1b13c97f | 2703 | |
2936b6ab SS |
2704 | /* create an fdb entry for a valid default destination */ |
2705 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2706 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2707 | &vxlan->default_dst.remote_ip, | |
2708 | NUD_REACHABLE|NUD_PERMANENT, | |
2709 | NLM_F_EXCL|NLM_F_CREATE, | |
2710 | vxlan->dst_port, | |
2711 | vxlan->default_dst.remote_vni, | |
2712 | vxlan->default_dst.remote_ifindex, | |
2713 | NTF_SELF); | |
2714 | if (err) | |
2715 | return err; | |
2716 | } | |
d342894c | 2717 | |
afbd8bae MR |
2718 | err = register_netdevice(dev); |
2719 | if (err) { | |
ba609e9b | 2720 | vxlan_fdb_delete_default(vxlan); |
afbd8bae MR |
2721 | return err; |
2722 | } | |
2723 | ||
553675fb | 2724 | list_add(&vxlan->next, &vn->vxlan_list); |
553675fb | 2725 | |
2726 | return 0; | |
d342894c | 2727 | } |
2728 | ||
2729 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2730 | { | |
2731 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2732 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 2733 | |
fe5c3561 | 2734 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2735 | if (!hlist_unhashed(&vxlan->hlist)) |
2736 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 2737 | spin_unlock(&vn->sock_lock); |
2738 | ||
553675fb | 2739 | list_del(&vxlan->next); |
d342894c | 2740 | unregister_netdevice_queue(dev, head); |
2741 | } | |
2742 | ||
2743 | static size_t vxlan_get_size(const struct net_device *dev) | |
2744 | { | |
2745 | ||
2746 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 2747 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 2748 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 2749 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 2750 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
2751 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
2752 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
2753 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
2754 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
2755 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
2756 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 2757 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
2758 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 2759 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
2760 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
2761 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
2762 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
2763 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
d342894c | 2764 | 0; |
2765 | } | |
2766 | ||
2767 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
2768 | { | |
2769 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 2770 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 2771 | struct ifla_vxlan_port_range ports = { |
2772 | .low = htons(vxlan->port_min), | |
2773 | .high = htons(vxlan->port_max), | |
2774 | }; | |
d342894c | 2775 | |
c7995c43 | 2776 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 2777 | goto nla_put_failure; |
2778 | ||
e4c7ed41 CW |
2779 | if (!vxlan_addr_any(&dst->remote_ip)) { |
2780 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
2781 | if (nla_put_be32(skb, IFLA_VXLAN_GROUP, | |
2782 | dst->remote_ip.sin.sin_addr.s_addr)) | |
2783 | goto nla_put_failure; | |
2784 | #if IS_ENABLED(CONFIG_IPV6) | |
2785 | } else { | |
2786 | if (nla_put(skb, IFLA_VXLAN_GROUP6, sizeof(struct in6_addr), | |
2787 | &dst->remote_ip.sin6.sin6_addr)) | |
2788 | goto nla_put_failure; | |
2789 | #endif | |
2790 | } | |
2791 | } | |
d342894c | 2792 | |
c7995c43 | 2793 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 2794 | goto nla_put_failure; |
2795 | ||
e4c7ed41 CW |
2796 | if (!vxlan_addr_any(&vxlan->saddr)) { |
2797 | if (vxlan->saddr.sa.sa_family == AF_INET) { | |
2798 | if (nla_put_be32(skb, IFLA_VXLAN_LOCAL, | |
2799 | vxlan->saddr.sin.sin_addr.s_addr)) | |
2800 | goto nla_put_failure; | |
2801 | #if IS_ENABLED(CONFIG_IPV6) | |
2802 | } else { | |
2803 | if (nla_put(skb, IFLA_VXLAN_LOCAL6, sizeof(struct in6_addr), | |
2804 | &vxlan->saddr.sin6.sin6_addr)) | |
2805 | goto nla_put_failure; | |
2806 | #endif | |
2807 | } | |
2808 | } | |
d342894c | 2809 | |
2810 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
2811 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
2812 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
2813 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
2814 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
2815 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
2816 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
2817 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
2818 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
2819 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
2820 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 2821 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
823aa873 | 2822 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || |
359a0ea9 TH |
2823 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port) || |
2824 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, | |
2825 | !!(vxlan->flags & VXLAN_F_UDP_CSUM)) || | |
2826 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, | |
2827 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
2828 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
2829 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX))) | |
d342894c | 2830 | goto nla_put_failure; |
2831 | ||
05f47d69 | 2832 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
2833 | goto nla_put_failure; | |
2834 | ||
d342894c | 2835 | return 0; |
2836 | ||
2837 | nla_put_failure: | |
2838 | return -EMSGSIZE; | |
2839 | } | |
2840 | ||
2841 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { | |
2842 | .kind = "vxlan", | |
2843 | .maxtype = IFLA_VXLAN_MAX, | |
2844 | .policy = vxlan_policy, | |
2845 | .priv_size = sizeof(struct vxlan_dev), | |
2846 | .setup = vxlan_setup, | |
2847 | .validate = vxlan_validate, | |
2848 | .newlink = vxlan_newlink, | |
2849 | .dellink = vxlan_dellink, | |
2850 | .get_size = vxlan_get_size, | |
2851 | .fill_info = vxlan_fill_info, | |
2852 | }; | |
2853 | ||
acaf4e70 DB |
2854 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
2855 | struct net_device *dev) | |
2856 | { | |
2857 | struct vxlan_dev *vxlan, *next; | |
2858 | LIST_HEAD(list_kill); | |
2859 | ||
2860 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
2861 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2862 | ||
2863 | /* In case we created vxlan device with carrier | |
2864 | * and we loose the carrier due to module unload | |
2865 | * we also need to remove vxlan device. In other | |
2866 | * cases, it's not necessary and remote_ifindex | |
2867 | * is 0 here, so no matches. | |
2868 | */ | |
2869 | if (dst->remote_ifindex == dev->ifindex) | |
2870 | vxlan_dellink(vxlan->dev, &list_kill); | |
2871 | } | |
2872 | ||
2873 | unregister_netdevice_many(&list_kill); | |
2874 | } | |
2875 | ||
2876 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
2877 | unsigned long event, void *ptr) | |
2878 | { | |
2879 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 2880 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 2881 | |
783c1463 | 2882 | if (event == NETDEV_UNREGISTER) |
acaf4e70 DB |
2883 | vxlan_handle_lowerdev_unregister(vn, dev); |
2884 | ||
2885 | return NOTIFY_DONE; | |
2886 | } | |
2887 | ||
2888 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
2889 | .notifier_call = vxlan_lowerdev_event, | |
2890 | }; | |
2891 | ||
d342894c | 2892 | static __net_init int vxlan_init_net(struct net *net) |
2893 | { | |
2894 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 2895 | unsigned int h; |
d342894c | 2896 | |
553675fb | 2897 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 2898 | spin_lock_init(&vn->sock_lock); |
d342894c | 2899 | |
553675fb | 2900 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
2901 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 2902 | |
2903 | return 0; | |
2904 | } | |
2905 | ||
f01ec1c0 ND |
2906 | static void __net_exit vxlan_exit_net(struct net *net) |
2907 | { | |
2908 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2909 | struct vxlan_dev *vxlan, *next; | |
2910 | struct net_device *dev, *aux; | |
2911 | LIST_HEAD(list); | |
2912 | ||
2913 | rtnl_lock(); | |
2914 | for_each_netdev_safe(net, dev, aux) | |
2915 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
2916 | unregister_netdevice_queue(dev, &list); | |
2917 | ||
2918 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
2919 | /* If vxlan->dev is in the same netns, it has already been added | |
2920 | * to the list by the previous loop. | |
2921 | */ | |
2922 | if (!net_eq(dev_net(vxlan->dev), net)) | |
2923 | unregister_netdevice_queue(dev, &list); | |
2924 | } | |
2925 | ||
2926 | unregister_netdevice_many(&list); | |
2927 | rtnl_unlock(); | |
2928 | } | |
2929 | ||
d342894c | 2930 | static struct pernet_operations vxlan_net_ops = { |
2931 | .init = vxlan_init_net, | |
f01ec1c0 | 2932 | .exit = vxlan_exit_net, |
d342894c | 2933 | .id = &vxlan_net_id, |
2934 | .size = sizeof(struct vxlan_net), | |
2935 | }; | |
2936 | ||
2937 | static int __init vxlan_init_module(void) | |
2938 | { | |
2939 | int rc; | |
2940 | ||
758c57d1 SH |
2941 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
2942 | if (!vxlan_wq) | |
2943 | return -ENOMEM; | |
2944 | ||
d342894c | 2945 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
2946 | ||
783c1463 | 2947 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 2948 | if (rc) |
2949 | goto out1; | |
2950 | ||
acaf4e70 | 2951 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 2952 | if (rc) |
2953 | goto out2; | |
2954 | ||
acaf4e70 DB |
2955 | rc = rtnl_link_register(&vxlan_link_ops); |
2956 | if (rc) | |
2957 | goto out3; | |
d342894c | 2958 | |
acaf4e70 DB |
2959 | return 0; |
2960 | out3: | |
2961 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 2962 | out2: |
783c1463 | 2963 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 2964 | out1: |
758c57d1 | 2965 | destroy_workqueue(vxlan_wq); |
d342894c | 2966 | return rc; |
2967 | } | |
7332a13b | 2968 | late_initcall(vxlan_init_module); |
d342894c | 2969 | |
2970 | static void __exit vxlan_cleanup_module(void) | |
2971 | { | |
b7153984 | 2972 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 2973 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 2974 | destroy_workqueue(vxlan_wq); |
783c1463 DB |
2975 | unregister_pernet_subsys(&vxlan_net_ops); |
2976 | /* rcu_barrier() is called by netns */ | |
d342894c | 2977 | } |
2978 | module_exit(vxlan_cleanup_module); | |
2979 | ||
2980 | MODULE_LICENSE("GPL"); | |
2981 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 2982 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 2983 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 2984 | MODULE_ALIAS_RTNL_LINK("vxlan"); |