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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> | |
3ee64f39 | 36 | #include <net/udp_tunnel.h> |
d342894c | 37 | #include <net/rtnetlink.h> |
38 | #include <net/route.h> | |
39 | #include <net/dsfield.h> | |
40 | #include <net/inet_ecn.h> | |
41 | #include <net/net_namespace.h> | |
42 | #include <net/netns/generic.h> | |
012a5729 | 43 | #include <net/vxlan.h> |
dc01e7d3 | 44 | #include <net/protocol.h> |
e4c7ed41 CW |
45 | #if IS_ENABLED(CONFIG_IPV6) |
46 | #include <net/ipv6.h> | |
47 | #include <net/addrconf.h> | |
48 | #include <net/ip6_tunnel.h> | |
660d98ca | 49 | #include <net/ip6_checksum.h> |
e4c7ed41 | 50 | #endif |
d342894c | 51 | |
52 | #define VXLAN_VERSION "0.1" | |
53 | ||
553675fb | 54 | #define PORT_HASH_BITS 8 |
55 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 56 | #define VNI_HASH_BITS 10 |
57 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
58 | #define FDB_HASH_BITS 8 | |
59 | #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) | |
60 | #define FDB_AGE_DEFAULT 300 /* 5 min */ | |
61 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
62 | ||
63 | #define VXLAN_N_VID (1u << 24) | |
64 | #define VXLAN_VID_MASK (VXLAN_N_VID - 1) | |
7ce04758 | 65 | #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) |
d342894c | 66 | |
67 | #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */ | |
68 | ||
69 | /* VXLAN protocol header */ | |
70 | struct vxlanhdr { | |
71 | __be32 vx_flags; | |
72 | __be32 vx_vni; | |
73 | }; | |
74 | ||
23c578bf | 75 | /* UDP port for VXLAN traffic. |
76 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 77 | * for compatibility with early adopters. |
23c578bf | 78 | */ |
9daaa397 SH |
79 | static unsigned short vxlan_port __read_mostly = 8472; |
80 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 81 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
82 | ||
83 | static bool log_ecn_error = true; | |
84 | module_param(log_ecn_error, bool, 0644); | |
85 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
86 | ||
60d9d4c6 | 87 | static int vxlan_net_id; |
553675fb | 88 | |
afbd8bae MR |
89 | static const u8 all_zeros_mac[ETH_ALEN]; |
90 | ||
553675fb | 91 | /* per-network namespace private data for this module */ |
92 | struct vxlan_net { | |
93 | struct list_head vxlan_list; | |
94 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 95 | spinlock_t sock_lock; |
553675fb | 96 | }; |
97 | ||
e4c7ed41 CW |
98 | union vxlan_addr { |
99 | struct sockaddr_in sin; | |
100 | struct sockaddr_in6 sin6; | |
101 | struct sockaddr sa; | |
102 | }; | |
103 | ||
6681712d | 104 | struct vxlan_rdst { |
e4c7ed41 | 105 | union vxlan_addr remote_ip; |
6681712d DS |
106 | __be16 remote_port; |
107 | u32 remote_vni; | |
108 | u32 remote_ifindex; | |
3e61aa8f | 109 | struct list_head list; |
bc7892ba | 110 | struct rcu_head rcu; |
6681712d DS |
111 | }; |
112 | ||
d342894c | 113 | /* Forwarding table entry */ |
114 | struct vxlan_fdb { | |
115 | struct hlist_node hlist; /* linked list of entries */ | |
116 | struct rcu_head rcu; | |
117 | unsigned long updated; /* jiffies */ | |
118 | unsigned long used; | |
3e61aa8f | 119 | struct list_head remotes; |
d342894c | 120 | u16 state; /* see ndm_state */ |
ae884082 | 121 | u8 flags; /* see ndm_flags */ |
d342894c | 122 | u8 eth_addr[ETH_ALEN]; |
123 | }; | |
124 | ||
d342894c | 125 | /* Pseudo network device */ |
126 | struct vxlan_dev { | |
553675fb | 127 | struct hlist_node hlist; /* vni hash table */ |
128 | struct list_head next; /* vxlan's per namespace list */ | |
129 | struct vxlan_sock *vn_sock; /* listening socket */ | |
d342894c | 130 | struct net_device *dev; |
f01ec1c0 | 131 | struct net *net; /* netns for packet i/o */ |
c7995c43 | 132 | struct vxlan_rdst default_dst; /* default destination */ |
e4c7ed41 | 133 | union vxlan_addr saddr; /* source address */ |
823aa873 | 134 | __be16 dst_port; |
05f47d69 | 135 | __u16 port_min; /* source port range */ |
136 | __u16 port_max; | |
d342894c | 137 | __u8 tos; /* TOS override */ |
138 | __u8 ttl; | |
359a0ea9 | 139 | u32 flags; /* VXLAN_F_* in vxlan.h */ |
d342894c | 140 | |
1c51a915 | 141 | struct work_struct sock_work; |
3fc2de2f | 142 | struct work_struct igmp_join; |
143 | struct work_struct igmp_leave; | |
1c51a915 | 144 | |
d342894c | 145 | unsigned long age_interval; |
146 | struct timer_list age_timer; | |
147 | spinlock_t hash_lock; | |
148 | unsigned int addrcnt; | |
149 | unsigned int addrmax; | |
d342894c | 150 | |
151 | struct hlist_head fdb_head[FDB_HASH_SIZE]; | |
152 | }; | |
153 | ||
154 | /* salt for hash table */ | |
155 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 156 | static struct workqueue_struct *vxlan_wq; |
d342894c | 157 | |
1c51a915 SH |
158 | static void vxlan_sock_work(struct work_struct *work); |
159 | ||
e4c7ed41 CW |
160 | #if IS_ENABLED(CONFIG_IPV6) |
161 | static inline | |
162 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
163 | { | |
164 | if (a->sa.sa_family != b->sa.sa_family) | |
165 | return false; | |
166 | if (a->sa.sa_family == AF_INET6) | |
167 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
168 | else | |
169 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
170 | } | |
171 | ||
172 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
173 | { | |
174 | if (ipa->sa.sa_family == AF_INET6) | |
175 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
176 | else | |
177 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
178 | } | |
179 | ||
180 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
181 | { | |
182 | if (ipa->sa.sa_family == AF_INET6) | |
183 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
184 | else | |
185 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
186 | } | |
187 | ||
188 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
189 | { | |
190 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
191 | nla_memcpy(&ip->sin6.sin6_addr, nla, sizeof(struct in6_addr)); | |
192 | ip->sa.sa_family = AF_INET6; | |
193 | return 0; | |
194 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
195 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
196 | ip->sa.sa_family = AF_INET; | |
197 | return 0; | |
198 | } else { | |
199 | return -EAFNOSUPPORT; | |
200 | } | |
201 | } | |
202 | ||
203 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
204 | const union vxlan_addr *ip) | |
205 | { | |
206 | if (ip->sa.sa_family == AF_INET6) | |
207 | return nla_put(skb, attr, sizeof(struct in6_addr), &ip->sin6.sin6_addr); | |
208 | else | |
209 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
210 | } | |
211 | ||
212 | #else /* !CONFIG_IPV6 */ | |
213 | ||
214 | static inline | |
215 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
216 | { | |
217 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
218 | } | |
219 | ||
220 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
221 | { | |
222 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
223 | } | |
224 | ||
225 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
226 | { | |
227 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
228 | } | |
229 | ||
230 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
231 | { | |
232 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
233 | return -EAFNOSUPPORT; | |
234 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
235 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
236 | ip->sa.sa_family = AF_INET; | |
237 | return 0; | |
238 | } else { | |
239 | return -EAFNOSUPPORT; | |
240 | } | |
241 | } | |
242 | ||
243 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
244 | const union vxlan_addr *ip) | |
245 | { | |
246 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
247 | } | |
248 | #endif | |
249 | ||
553675fb | 250 | /* Virtual Network hash table head */ |
251 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
252 | { | |
253 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
254 | } | |
255 | ||
256 | /* Socket hash table head */ | |
257 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 258 | { |
259 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
260 | ||
553675fb | 261 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
262 | } | |
263 | ||
3e61aa8f SH |
264 | /* First remote destination for a forwarding entry. |
265 | * Guaranteed to be non-NULL because remotes are never deleted. | |
266 | */ | |
5ca5461c | 267 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 268 | { |
5ca5461c | 269 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
270 | } | |
271 | ||
272 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
273 | { | |
274 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
275 | } |
276 | ||
553675fb | 277 | /* Find VXLAN socket based on network namespace and UDP port */ |
9c2e24e1 | 278 | static struct vxlan_sock *vxlan_find_sock(struct net *net, __be16 port) |
553675fb | 279 | { |
280 | struct vxlan_sock *vs; | |
281 | ||
282 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
283 | if (inet_sk(vs->sock->sk)->inet_sport == port) | |
284 | return vs; | |
285 | } | |
286 | return NULL; | |
d342894c | 287 | } |
288 | ||
5cfccc5a | 289 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id) |
d342894c | 290 | { |
291 | struct vxlan_dev *vxlan; | |
d342894c | 292 | |
553675fb | 293 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { |
c7995c43 | 294 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 295 | return vxlan; |
296 | } | |
297 | ||
298 | return NULL; | |
299 | } | |
300 | ||
5cfccc5a PS |
301 | /* Look up VNI in a per net namespace table */ |
302 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, __be16 port) | |
303 | { | |
304 | struct vxlan_sock *vs; | |
305 | ||
306 | vs = vxlan_find_sock(net, port); | |
307 | if (!vs) | |
308 | return NULL; | |
309 | ||
310 | return vxlan_vs_find_vni(vs, id); | |
311 | } | |
312 | ||
d342894c | 313 | /* Fill in neighbour message in skbuff. */ |
314 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
315 | const struct vxlan_fdb *fdb, |
316 | u32 portid, u32 seq, int type, unsigned int flags, | |
317 | const struct vxlan_rdst *rdst) | |
d342894c | 318 | { |
319 | unsigned long now = jiffies; | |
320 | struct nda_cacheinfo ci; | |
321 | struct nlmsghdr *nlh; | |
322 | struct ndmsg *ndm; | |
e4f67add | 323 | bool send_ip, send_eth; |
d342894c | 324 | |
325 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
326 | if (nlh == NULL) | |
327 | return -EMSGSIZE; | |
328 | ||
329 | ndm = nlmsg_data(nlh); | |
330 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
331 | |
332 | send_eth = send_ip = true; | |
333 | ||
334 | if (type == RTM_GETNEIGH) { | |
335 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 336 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
337 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
338 | } else | |
339 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 340 | ndm->ndm_state = fdb->state; |
341 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 342 | ndm->ndm_flags = fdb->flags; |
545469f7 | 343 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 344 | |
e4f67add | 345 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 346 | goto nla_put_failure; |
347 | ||
e4c7ed41 | 348 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
349 | goto nla_put_failure; |
350 | ||
823aa873 | 351 | if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && |
6681712d DS |
352 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
353 | goto nla_put_failure; | |
c7995c43 | 354 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 355 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
356 | goto nla_put_failure; |
357 | if (rdst->remote_ifindex && | |
358 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 359 | goto nla_put_failure; |
360 | ||
361 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
362 | ci.ndm_confirmed = 0; | |
363 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
364 | ci.ndm_refcnt = 0; | |
365 | ||
366 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
367 | goto nla_put_failure; | |
368 | ||
369 | return nlmsg_end(skb, nlh); | |
370 | ||
371 | nla_put_failure: | |
372 | nlmsg_cancel(skb, nlh); | |
373 | return -EMSGSIZE; | |
374 | } | |
375 | ||
376 | static inline size_t vxlan_nlmsg_size(void) | |
377 | { | |
378 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
379 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 380 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 381 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
382 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
383 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
d342894c | 384 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
385 | } | |
386 | ||
9e4b93f9 ND |
387 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
388 | struct vxlan_rdst *rd, int type) | |
d342894c | 389 | { |
390 | struct net *net = dev_net(vxlan->dev); | |
391 | struct sk_buff *skb; | |
392 | int err = -ENOBUFS; | |
393 | ||
394 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
395 | if (skb == NULL) | |
396 | goto errout; | |
397 | ||
9e4b93f9 | 398 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 399 | if (err < 0) { |
400 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
401 | WARN_ON(err == -EMSGSIZE); | |
402 | kfree_skb(skb); | |
403 | goto errout; | |
404 | } | |
405 | ||
406 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
407 | return; | |
408 | errout: | |
409 | if (err < 0) | |
410 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
411 | } | |
412 | ||
e4c7ed41 | 413 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
414 | { |
415 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
416 | struct vxlan_fdb f = { |
417 | .state = NUD_STALE, | |
418 | }; | |
419 | struct vxlan_rdst remote = { | |
e4c7ed41 | 420 | .remote_ip = *ipa, /* goes to NDA_DST */ |
bb3fd687 SH |
421 | .remote_vni = VXLAN_N_VID, |
422 | }; | |
3e61aa8f | 423 | |
9e4b93f9 | 424 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
425 | } |
426 | ||
427 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
428 | { | |
bb3fd687 SH |
429 | struct vxlan_fdb f = { |
430 | .state = NUD_STALE, | |
431 | }; | |
9e4b93f9 | 432 | struct vxlan_rdst remote = { }; |
e4f67add | 433 | |
e4f67add DS |
434 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
435 | ||
9e4b93f9 | 436 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
437 | } |
438 | ||
d342894c | 439 | /* Hash Ethernet address */ |
440 | static u32 eth_hash(const unsigned char *addr) | |
441 | { | |
442 | u64 value = get_unaligned((u64 *)addr); | |
443 | ||
444 | /* only want 6 bytes */ | |
445 | #ifdef __BIG_ENDIAN | |
d342894c | 446 | value >>= 16; |
321fb991 | 447 | #else |
448 | value <<= 16; | |
d342894c | 449 | #endif |
450 | return hash_64(value, FDB_HASH_BITS); | |
451 | } | |
452 | ||
453 | /* Hash chain to use given mac address */ | |
454 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
455 | const u8 *mac) | |
456 | { | |
457 | return &vxlan->fdb_head[eth_hash(mac)]; | |
458 | } | |
459 | ||
460 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 461 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 462 | const u8 *mac) |
d342894c | 463 | { |
464 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
465 | struct vxlan_fdb *f; | |
d342894c | 466 | |
b67bfe0d | 467 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 468 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 469 | return f; |
470 | } | |
471 | ||
472 | return NULL; | |
473 | } | |
474 | ||
014be2c8 SS |
475 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
476 | const u8 *mac) | |
477 | { | |
478 | struct vxlan_fdb *f; | |
479 | ||
480 | f = __vxlan_find_mac(vxlan, mac); | |
481 | if (f) | |
482 | f->used = jiffies; | |
483 | ||
484 | return f; | |
485 | } | |
486 | ||
a5e7c10a MR |
487 | /* caller should hold vxlan->hash_lock */ |
488 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 489 | union vxlan_addr *ip, __be16 port, |
a5e7c10a | 490 | __u32 vni, __u32 ifindex) |
6681712d | 491 | { |
3e61aa8f | 492 | struct vxlan_rdst *rd; |
6681712d | 493 | |
3e61aa8f | 494 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 495 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
496 | rd->remote_port == port && |
497 | rd->remote_vni == vni && | |
498 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 499 | return rd; |
6681712d | 500 | } |
3e61aa8f | 501 | |
a5e7c10a MR |
502 | return NULL; |
503 | } | |
504 | ||
906dc186 TR |
505 | /* Replace destination of unicast mac */ |
506 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
e4c7ed41 | 507 | union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex) |
906dc186 TR |
508 | { |
509 | struct vxlan_rdst *rd; | |
510 | ||
511 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
512 | if (rd) | |
513 | return 0; | |
514 | ||
515 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
516 | if (!rd) | |
517 | return 0; | |
e4c7ed41 | 518 | rd->remote_ip = *ip; |
906dc186 TR |
519 | rd->remote_port = port; |
520 | rd->remote_vni = vni; | |
521 | rd->remote_ifindex = ifindex; | |
522 | return 1; | |
523 | } | |
524 | ||
a5e7c10a MR |
525 | /* Add/update destinations for multicast */ |
526 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
9e4b93f9 ND |
527 | union vxlan_addr *ip, __be16 port, __u32 vni, |
528 | __u32 ifindex, struct vxlan_rdst **rdp) | |
a5e7c10a MR |
529 | { |
530 | struct vxlan_rdst *rd; | |
531 | ||
532 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
533 | if (rd) | |
534 | return 0; | |
535 | ||
6681712d DS |
536 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
537 | if (rd == NULL) | |
538 | return -ENOBUFS; | |
e4c7ed41 | 539 | rd->remote_ip = *ip; |
6681712d DS |
540 | rd->remote_port = port; |
541 | rd->remote_vni = vni; | |
542 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
543 | |
544 | list_add_tail_rcu(&rd->list, &f->remotes); | |
545 | ||
9e4b93f9 | 546 | *rdp = rd; |
6681712d DS |
547 | return 1; |
548 | } | |
549 | ||
dc01e7d3 OG |
550 | static struct sk_buff **vxlan_gro_receive(struct sk_buff **head, struct sk_buff *skb) |
551 | { | |
552 | struct sk_buff *p, **pp = NULL; | |
553 | struct vxlanhdr *vh, *vh2; | |
554 | struct ethhdr *eh, *eh2; | |
555 | unsigned int hlen, off_vx, off_eth; | |
556 | const struct packet_offload *ptype; | |
557 | __be16 type; | |
558 | int flush = 1; | |
559 | ||
560 | off_vx = skb_gro_offset(skb); | |
561 | hlen = off_vx + sizeof(*vh); | |
562 | vh = skb_gro_header_fast(skb, off_vx); | |
563 | if (skb_gro_header_hard(skb, hlen)) { | |
564 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
565 | if (unlikely(!vh)) | |
566 | goto out; | |
567 | } | |
568 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ | |
6bae1d4c | 569 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
570 | |
571 | off_eth = skb_gro_offset(skb); | |
572 | hlen = off_eth + sizeof(*eh); | |
573 | eh = skb_gro_header_fast(skb, off_eth); | |
574 | if (skb_gro_header_hard(skb, hlen)) { | |
575 | eh = skb_gro_header_slow(skb, hlen, off_eth); | |
576 | if (unlikely(!eh)) | |
577 | goto out; | |
578 | } | |
579 | ||
580 | flush = 0; | |
581 | ||
582 | for (p = *head; p; p = p->next) { | |
583 | if (!NAPI_GRO_CB(p)->same_flow) | |
584 | continue; | |
585 | ||
586 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
587 | eh2 = (struct ethhdr *)(p->data + off_eth); | |
588 | if (vh->vx_vni != vh2->vx_vni || compare_ether_header(eh, eh2)) { | |
589 | NAPI_GRO_CB(p)->same_flow = 0; | |
590 | continue; | |
591 | } | |
dc01e7d3 OG |
592 | } |
593 | ||
dc01e7d3 OG |
594 | type = eh->h_proto; |
595 | ||
596 | rcu_read_lock(); | |
597 | ptype = gro_find_receive_by_type(type); | |
598 | if (ptype == NULL) { | |
599 | flush = 1; | |
600 | goto out_unlock; | |
601 | } | |
602 | ||
603 | skb_gro_pull(skb, sizeof(*eh)); /* pull inner eth header */ | |
6bae1d4c | 604 | skb_gro_postpull_rcsum(skb, eh, sizeof(*eh)); |
dc01e7d3 OG |
605 | pp = ptype->callbacks.gro_receive(head, skb); |
606 | ||
607 | out_unlock: | |
608 | rcu_read_unlock(); | |
609 | out: | |
610 | NAPI_GRO_CB(skb)->flush |= flush; | |
611 | ||
612 | return pp; | |
613 | } | |
614 | ||
615 | static int vxlan_gro_complete(struct sk_buff *skb, int nhoff) | |
616 | { | |
617 | struct ethhdr *eh; | |
618 | struct packet_offload *ptype; | |
619 | __be16 type; | |
620 | int vxlan_len = sizeof(struct vxlanhdr) + sizeof(struct ethhdr); | |
621 | int err = -ENOSYS; | |
622 | ||
623 | eh = (struct ethhdr *)(skb->data + nhoff + sizeof(struct vxlanhdr)); | |
624 | type = eh->h_proto; | |
625 | ||
626 | rcu_read_lock(); | |
627 | ptype = gro_find_complete_by_type(type); | |
628 | if (ptype != NULL) | |
629 | err = ptype->callbacks.gro_complete(skb, nhoff + vxlan_len); | |
630 | ||
631 | rcu_read_unlock(); | |
632 | return err; | |
633 | } | |
634 | ||
53cf5275 | 635 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 636 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
637 | { |
638 | struct net_device *dev; | |
dc01e7d3 | 639 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
640 | struct net *net = sock_net(sk); |
641 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 642 | __be16 port = inet_sk(sk)->inet_sport; |
dc01e7d3 OG |
643 | int err; |
644 | ||
645 | if (sa_family == AF_INET) { | |
646 | err = udp_add_offload(&vs->udp_offloads); | |
647 | if (err) | |
648 | pr_warn("vxlan: udp_add_offload failed with status %d\n", err); | |
649 | } | |
53cf5275 JG |
650 | |
651 | rcu_read_lock(); | |
652 | for_each_netdev_rcu(net, dev) { | |
653 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
654 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
655 | port); | |
656 | } | |
657 | rcu_read_unlock(); | |
658 | } | |
659 | ||
660 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 661 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
662 | { |
663 | struct net_device *dev; | |
dc01e7d3 | 664 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
665 | struct net *net = sock_net(sk); |
666 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 667 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
668 | |
669 | rcu_read_lock(); | |
670 | for_each_netdev_rcu(net, dev) { | |
671 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
672 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
673 | port); | |
674 | } | |
675 | rcu_read_unlock(); | |
dc01e7d3 OG |
676 | |
677 | if (sa_family == AF_INET) | |
678 | udp_del_offload(&vs->udp_offloads); | |
53cf5275 JG |
679 | } |
680 | ||
d342894c | 681 | /* Add new entry to forwarding table -- assumes lock held */ |
682 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 683 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 684 | __u16 state, __u16 flags, |
73cf3317 | 685 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 686 | __u8 ndm_flags) |
d342894c | 687 | { |
9e4b93f9 | 688 | struct vxlan_rdst *rd = NULL; |
d342894c | 689 | struct vxlan_fdb *f; |
690 | int notify = 0; | |
691 | ||
014be2c8 | 692 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 693 | if (f) { |
694 | if (flags & NLM_F_EXCL) { | |
695 | netdev_dbg(vxlan->dev, | |
696 | "lost race to create %pM\n", mac); | |
697 | return -EEXIST; | |
698 | } | |
699 | if (f->state != state) { | |
700 | f->state = state; | |
701 | f->updated = jiffies; | |
702 | notify = 1; | |
703 | } | |
ae884082 DS |
704 | if (f->flags != ndm_flags) { |
705 | f->flags = ndm_flags; | |
706 | f->updated = jiffies; | |
707 | notify = 1; | |
708 | } | |
906dc186 TR |
709 | if ((flags & NLM_F_REPLACE)) { |
710 | /* Only change unicasts */ | |
711 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
712 | is_zero_ether_addr(f->eth_addr))) { | |
713 | int rc = vxlan_fdb_replace(f, ip, port, vni, | |
714 | ifindex); | |
715 | ||
716 | if (rc < 0) | |
717 | return rc; | |
718 | notify |= rc; | |
719 | } else | |
720 | return -EOPNOTSUPP; | |
721 | } | |
6681712d | 722 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
723 | (is_multicast_ether_addr(f->eth_addr) || |
724 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
725 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
726 | &rd); | |
6681712d DS |
727 | |
728 | if (rc < 0) | |
729 | return rc; | |
730 | notify |= rc; | |
731 | } | |
d342894c | 732 | } else { |
733 | if (!(flags & NLM_F_CREATE)) | |
734 | return -ENOENT; | |
735 | ||
736 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
737 | return -ENOSPC; | |
738 | ||
906dc186 TR |
739 | /* Disallow replace to add a multicast entry */ |
740 | if ((flags & NLM_F_REPLACE) && | |
741 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
742 | return -EOPNOTSUPP; | |
743 | ||
e4c7ed41 | 744 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 745 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
746 | if (!f) | |
747 | return -ENOMEM; | |
748 | ||
749 | notify = 1; | |
d342894c | 750 | f->state = state; |
ae884082 | 751 | f->flags = ndm_flags; |
d342894c | 752 | f->updated = f->used = jiffies; |
3e61aa8f | 753 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 754 | memcpy(f->eth_addr, mac, ETH_ALEN); |
755 | ||
9e4b93f9 | 756 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 757 | |
d342894c | 758 | ++vxlan->addrcnt; |
759 | hlist_add_head_rcu(&f->hlist, | |
760 | vxlan_fdb_head(vxlan, mac)); | |
761 | } | |
762 | ||
9e4b93f9 ND |
763 | if (notify) { |
764 | if (rd == NULL) | |
765 | rd = first_remote_rtnl(f); | |
766 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
767 | } | |
d342894c | 768 | |
769 | return 0; | |
770 | } | |
771 | ||
6706c82e | 772 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
773 | { |
774 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 775 | struct vxlan_rdst *rd, *nd; |
6681712d | 776 | |
3e61aa8f | 777 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 778 | kfree(rd); |
6681712d DS |
779 | kfree(f); |
780 | } | |
781 | ||
d342894c | 782 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
783 | { | |
784 | netdev_dbg(vxlan->dev, | |
785 | "delete %pM\n", f->eth_addr); | |
786 | ||
787 | --vxlan->addrcnt; | |
9e4b93f9 | 788 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 789 | |
790 | hlist_del_rcu(&f->hlist); | |
6681712d | 791 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 792 | } |
793 | ||
f0b074be | 794 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
e4c7ed41 | 795 | union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex) |
d342894c | 796 | { |
6681712d | 797 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 798 | int err; |
d342894c | 799 | |
f0b074be | 800 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
801 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
802 | if (err) | |
803 | return err; | |
f0b074be | 804 | } else { |
e4c7ed41 CW |
805 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
806 | if (remote->sa.sa_family == AF_INET) { | |
807 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
808 | ip->sa.sa_family = AF_INET; | |
809 | #if IS_ENABLED(CONFIG_IPV6) | |
810 | } else { | |
811 | ip->sin6.sin6_addr = in6addr_any; | |
812 | ip->sa.sa_family = AF_INET6; | |
813 | #endif | |
814 | } | |
f0b074be | 815 | } |
d342894c | 816 | |
6681712d | 817 | if (tb[NDA_PORT]) { |
73cf3317 | 818 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 819 | return -EINVAL; |
f0b074be MR |
820 | *port = nla_get_be16(tb[NDA_PORT]); |
821 | } else { | |
822 | *port = vxlan->dst_port; | |
823 | } | |
6681712d DS |
824 | |
825 | if (tb[NDA_VNI]) { | |
826 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
827 | return -EINVAL; | |
f0b074be MR |
828 | *vni = nla_get_u32(tb[NDA_VNI]); |
829 | } else { | |
830 | *vni = vxlan->default_dst.remote_vni; | |
831 | } | |
6681712d DS |
832 | |
833 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 834 | struct net_device *tdev; |
6681712d DS |
835 | |
836 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
837 | return -EINVAL; | |
f0b074be | 838 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 839 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 840 | if (!tdev) |
6681712d | 841 | return -EADDRNOTAVAIL; |
f0b074be MR |
842 | } else { |
843 | *ifindex = 0; | |
844 | } | |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
849 | /* Add static entry (via netlink) */ | |
850 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
851 | struct net_device *dev, | |
852 | const unsigned char *addr, u16 flags) | |
853 | { | |
854 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
855 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 856 | union vxlan_addr ip; |
f0b074be MR |
857 | __be16 port; |
858 | u32 vni, ifindex; | |
859 | int err; | |
860 | ||
861 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
862 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
863 | ndm->ndm_state); | |
864 | return -EINVAL; | |
865 | } | |
866 | ||
867 | if (tb[NDA_DST] == NULL) | |
868 | return -EINVAL; | |
869 | ||
870 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
871 | if (err) | |
872 | return err; | |
6681712d | 873 | |
5933a7bb MR |
874 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
875 | return -EAFNOSUPPORT; | |
876 | ||
d342894c | 877 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 878 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 879 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 880 | spin_unlock_bh(&vxlan->hash_lock); |
881 | ||
882 | return err; | |
883 | } | |
884 | ||
885 | /* Delete entry (via netlink) */ | |
1690be63 VY |
886 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
887 | struct net_device *dev, | |
d342894c | 888 | const unsigned char *addr) |
889 | { | |
890 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
891 | struct vxlan_fdb *f; | |
bc7892ba | 892 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 893 | union vxlan_addr ip; |
bc7892ba MR |
894 | __be16 port; |
895 | u32 vni, ifindex; | |
896 | int err; | |
897 | ||
898 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
899 | if (err) | |
900 | return err; | |
901 | ||
902 | err = -ENOENT; | |
d342894c | 903 | |
904 | spin_lock_bh(&vxlan->hash_lock); | |
905 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
906 | if (!f) |
907 | goto out; | |
908 | ||
e4c7ed41 CW |
909 | if (!vxlan_addr_any(&ip)) { |
910 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
911 | if (!rd) |
912 | goto out; | |
913 | } | |
914 | ||
915 | err = 0; | |
916 | ||
917 | /* remove a destination if it's not the only one on the list, | |
918 | * otherwise destroy the fdb entry | |
919 | */ | |
920 | if (rd && !list_is_singular(&f->remotes)) { | |
921 | list_del_rcu(&rd->list); | |
9e4b93f9 | 922 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 923 | kfree_rcu(rd, rcu); |
bc7892ba | 924 | goto out; |
d342894c | 925 | } |
bc7892ba MR |
926 | |
927 | vxlan_fdb_destroy(vxlan, f); | |
928 | ||
929 | out: | |
d342894c | 930 | spin_unlock_bh(&vxlan->hash_lock); |
931 | ||
932 | return err; | |
933 | } | |
934 | ||
935 | /* Dump forwarding table */ | |
936 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 JHS |
937 | struct net_device *dev, |
938 | struct net_device *filter_dev, int idx) | |
d342894c | 939 | { |
940 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
941 | unsigned int h; | |
942 | ||
943 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
944 | struct vxlan_fdb *f; | |
d342894c | 945 | int err; |
946 | ||
b67bfe0d | 947 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 948 | struct vxlan_rdst *rd; |
6681712d | 949 | |
3e61aa8f SH |
950 | if (idx < cb->args[0]) |
951 | goto skip; | |
952 | ||
953 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
954 | err = vxlan_fdb_info(skb, vxlan, f, |
955 | NETLINK_CB(cb->skb).portid, | |
956 | cb->nlh->nlmsg_seq, | |
957 | RTM_NEWNEIGH, | |
958 | NLM_F_MULTI, rd); | |
959 | if (err < 0) | |
3e61aa8f | 960 | goto out; |
6681712d | 961 | } |
3e61aa8f SH |
962 | skip: |
963 | ++idx; | |
d342894c | 964 | } |
965 | } | |
3e61aa8f | 966 | out: |
d342894c | 967 | return idx; |
968 | } | |
969 | ||
970 | /* Watch incoming packets to learn mapping between Ethernet address | |
971 | * and Tunnel endpoint. | |
26a41ae6 | 972 | * Return true if packet is bogus and should be droppped. |
d342894c | 973 | */ |
26a41ae6 | 974 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 975 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 976 | { |
977 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
978 | struct vxlan_fdb *f; | |
d342894c | 979 | |
980 | f = vxlan_find_mac(vxlan, src_mac); | |
981 | if (likely(f)) { | |
5ca5461c | 982 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 983 | |
e4c7ed41 | 984 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 985 | return false; |
986 | ||
987 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 988 | if (f->state & NUD_NOARP) |
26a41ae6 | 989 | return true; |
d342894c | 990 | |
991 | if (net_ratelimit()) | |
992 | netdev_info(dev, | |
e4c7ed41 | 993 | "%pM migrated from %pIS to %pIS\n", |
3e61aa8f | 994 | src_mac, &rdst->remote_ip, &src_ip); |
d342894c | 995 | |
e4c7ed41 | 996 | rdst->remote_ip = *src_ip; |
d342894c | 997 | f->updated = jiffies; |
9e4b93f9 | 998 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 999 | } else { |
1000 | /* learned new entry */ | |
1001 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 1002 | |
1003 | /* close off race between vxlan_flush and incoming packets */ | |
1004 | if (netif_running(dev)) | |
1005 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
1006 | NUD_REACHABLE, | |
1007 | NLM_F_EXCL|NLM_F_CREATE, | |
1008 | vxlan->dst_port, | |
1009 | vxlan->default_dst.remote_vni, | |
1010 | 0, NTF_SELF); | |
d342894c | 1011 | spin_unlock(&vxlan->hash_lock); |
1012 | } | |
26a41ae6 | 1013 | |
1014 | return false; | |
d342894c | 1015 | } |
1016 | ||
d342894c | 1017 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1018 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1019 | { |
553675fb | 1020 | struct vxlan_dev *vxlan; |
d342894c | 1021 | |
95ab0991 G |
1022 | /* The vxlan_sock is only used by dev, leaving group has |
1023 | * no effect on other vxlan devices. | |
1024 | */ | |
1025 | if (atomic_read(&dev->vn_sock->refcnt) == 1) | |
1026 | return false; | |
1027 | ||
553675fb | 1028 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1029 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1030 | continue; |
d342894c | 1031 | |
95ab0991 G |
1032 | if (vxlan->vn_sock != dev->vn_sock) |
1033 | continue; | |
1034 | ||
1035 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1036 | &dev->default_dst.remote_ip)) | |
1037 | continue; | |
1038 | ||
1039 | if (vxlan->default_dst.remote_ifindex != | |
1040 | dev->default_dst.remote_ifindex) | |
1041 | continue; | |
1042 | ||
1043 | return true; | |
553675fb | 1044 | } |
d342894c | 1045 | |
1046 | return false; | |
1047 | } | |
1048 | ||
7c47cedf | 1049 | static void vxlan_sock_hold(struct vxlan_sock *vs) |
d342894c | 1050 | { |
7c47cedf SH |
1051 | atomic_inc(&vs->refcnt); |
1052 | } | |
d342894c | 1053 | |
012a5729 | 1054 | void vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 1055 | { |
53cf5275 JG |
1056 | struct sock *sk = vs->sock->sk; |
1057 | struct net *net = sock_net(sk); | |
1058 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
012a5729 | 1059 | |
7c47cedf SH |
1060 | if (!atomic_dec_and_test(&vs->refcnt)) |
1061 | return; | |
d342894c | 1062 | |
1c51a915 | 1063 | spin_lock(&vn->sock_lock); |
7c47cedf | 1064 | hlist_del_rcu(&vs->hlist); |
559835ea | 1065 | rcu_assign_sk_user_data(vs->sock->sk, NULL); |
dc01e7d3 | 1066 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1067 | spin_unlock(&vn->sock_lock); |
1068 | ||
7c47cedf | 1069 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 1070 | } |
012a5729 | 1071 | EXPORT_SYMBOL_GPL(vxlan_sock_release); |
d342894c | 1072 | |
3fc2de2f | 1073 | /* Callback to update multicast group membership when first VNI on |
1074 | * multicast asddress is brought up | |
1075 | * Done as workqueue because ip_mc_join_group acquires RTNL. | |
7c47cedf | 1076 | */ |
3fc2de2f | 1077 | static void vxlan_igmp_join(struct work_struct *work) |
d342894c | 1078 | { |
3fc2de2f | 1079 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_join); |
7c47cedf SH |
1080 | struct vxlan_sock *vs = vxlan->vn_sock; |
1081 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1082 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1083 | int ifindex = vxlan->default_dst.remote_ifindex; | |
d342894c | 1084 | |
d342894c | 1085 | lock_sock(sk); |
e4c7ed41 CW |
1086 | if (ip->sa.sa_family == AF_INET) { |
1087 | struct ip_mreqn mreq = { | |
1088 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1089 | .imr_ifindex = ifindex, | |
1090 | }; | |
1091 | ||
1092 | ip_mc_join_group(sk, &mreq); | |
1093 | #if IS_ENABLED(CONFIG_IPV6) | |
1094 | } else { | |
1095 | ipv6_stub->ipv6_sock_mc_join(sk, ifindex, | |
1096 | &ip->sin6.sin6_addr); | |
1097 | #endif | |
1098 | } | |
3fc2de2f | 1099 | release_sock(sk); |
1100 | ||
012a5729 | 1101 | vxlan_sock_release(vs); |
3fc2de2f | 1102 | dev_put(vxlan->dev); |
1103 | } | |
1104 | ||
1105 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
1106 | static void vxlan_igmp_leave(struct work_struct *work) | |
1107 | { | |
1108 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_leave); | |
3fc2de2f | 1109 | struct vxlan_sock *vs = vxlan->vn_sock; |
1110 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1111 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1112 | int ifindex = vxlan->default_dst.remote_ifindex; | |
3fc2de2f | 1113 | |
1114 | lock_sock(sk); | |
e4c7ed41 CW |
1115 | if (ip->sa.sa_family == AF_INET) { |
1116 | struct ip_mreqn mreq = { | |
1117 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1118 | .imr_ifindex = ifindex, | |
1119 | }; | |
1120 | ||
1121 | ip_mc_leave_group(sk, &mreq); | |
1122 | #if IS_ENABLED(CONFIG_IPV6) | |
1123 | } else { | |
1124 | ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, | |
1125 | &ip->sin6.sin6_addr); | |
1126 | #endif | |
1127 | } | |
1128 | ||
d342894c | 1129 | release_sock(sk); |
d342894c | 1130 | |
012a5729 | 1131 | vxlan_sock_release(vs); |
7c47cedf | 1132 | dev_put(vxlan->dev); |
d342894c | 1133 | } |
1134 | ||
1135 | /* Callback from net/ipv4/udp.c to receive packets */ | |
1136 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
1137 | { | |
5cfccc5a | 1138 | struct vxlan_sock *vs; |
d342894c | 1139 | struct vxlanhdr *vxh; |
d342894c | 1140 | |
d342894c | 1141 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1142 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 1143 | goto error; |
1144 | ||
7ce04758 PS |
1145 | /* Return packets with reserved bits set */ |
1146 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
d342894c | 1147 | if (vxh->vx_flags != htonl(VXLAN_FLAGS) || |
1148 | (vxh->vx_vni & htonl(0xff))) { | |
1149 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1150 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
1151 | goto error; | |
1152 | } | |
1153 | ||
5cfccc5a PS |
1154 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
1155 | goto drop; | |
1156 | ||
559835ea | 1157 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1158 | if (!vs) |
d342894c | 1159 | goto drop; |
d342894c | 1160 | |
f79b064c | 1161 | skb_pop_rcv_encapsulation(skb); |
d0bc6555 | 1162 | |
5cfccc5a PS |
1163 | vs->rcv(vs, skb, vxh->vx_vni); |
1164 | return 0; | |
1165 | ||
1166 | drop: | |
1167 | /* Consume bad packet */ | |
1168 | kfree_skb(skb); | |
1169 | return 0; | |
1170 | ||
1171 | error: | |
1172 | /* Return non vxlan pkt */ | |
1173 | return 1; | |
1174 | } | |
1175 | ||
1176 | static void vxlan_rcv(struct vxlan_sock *vs, | |
1177 | struct sk_buff *skb, __be32 vx_vni) | |
1178 | { | |
e4c7ed41 CW |
1179 | struct iphdr *oip = NULL; |
1180 | struct ipv6hdr *oip6 = NULL; | |
5cfccc5a | 1181 | struct vxlan_dev *vxlan; |
8f84985f | 1182 | struct pcpu_sw_netstats *stats; |
e4c7ed41 | 1183 | union vxlan_addr saddr; |
5cfccc5a | 1184 | __u32 vni; |
e4c7ed41 CW |
1185 | int err = 0; |
1186 | union vxlan_addr *remote_ip; | |
5cfccc5a PS |
1187 | |
1188 | vni = ntohl(vx_vni) >> 8; | |
1189 | /* Is this VNI defined? */ | |
1190 | vxlan = vxlan_vs_find_vni(vs, vni); | |
1191 | if (!vxlan) | |
d342894c | 1192 | goto drop; |
d342894c | 1193 | |
e4c7ed41 | 1194 | remote_ip = &vxlan->default_dst.remote_ip; |
e4f67add | 1195 | skb_reset_mac_header(skb); |
f01ec1c0 | 1196 | skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev))); |
d342894c | 1197 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
f79b064c | 1198 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
d342894c | 1199 | |
1200 | /* Ignore packet loops (and multicast echo) */ | |
7367d0b5 | 1201 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) |
d342894c | 1202 | goto drop; |
1203 | ||
7ce04758 | 1204 | /* Re-examine inner Ethernet packet */ |
e4c7ed41 CW |
1205 | if (remote_ip->sa.sa_family == AF_INET) { |
1206 | oip = ip_hdr(skb); | |
1207 | saddr.sin.sin_addr.s_addr = oip->saddr; | |
1208 | saddr.sa.sa_family = AF_INET; | |
1209 | #if IS_ENABLED(CONFIG_IPV6) | |
1210 | } else { | |
1211 | oip6 = ipv6_hdr(skb); | |
1212 | saddr.sin6.sin6_addr = oip6->saddr; | |
1213 | saddr.sa.sa_family = AF_INET6; | |
1214 | #endif | |
1215 | } | |
1216 | ||
26a41ae6 | 1217 | if ((vxlan->flags & VXLAN_F_LEARN) && |
e4c7ed41 | 1218 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) |
26a41ae6 | 1219 | goto drop; |
d342894c | 1220 | |
d342894c | 1221 | skb_reset_network_header(skb); |
0afb1666 | 1222 | |
e4c7ed41 CW |
1223 | if (oip6) |
1224 | err = IP6_ECN_decapsulate(oip6, skb); | |
1225 | if (oip) | |
1226 | err = IP_ECN_decapsulate(oip, skb); | |
1227 | ||
d342894c | 1228 | if (unlikely(err)) { |
e4c7ed41 CW |
1229 | if (log_ecn_error) { |
1230 | if (oip6) | |
1231 | net_info_ratelimited("non-ECT from %pI6\n", | |
1232 | &oip6->saddr); | |
1233 | if (oip) | |
1234 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1235 | &oip->saddr, oip->tos); | |
1236 | } | |
d342894c | 1237 | if (err > 1) { |
1238 | ++vxlan->dev->stats.rx_frame_errors; | |
1239 | ++vxlan->dev->stats.rx_errors; | |
1240 | goto drop; | |
1241 | } | |
1242 | } | |
1243 | ||
e8171045 | 1244 | stats = this_cpu_ptr(vxlan->dev->tstats); |
d342894c | 1245 | u64_stats_update_begin(&stats->syncp); |
1246 | stats->rx_packets++; | |
1247 | stats->rx_bytes += skb->len; | |
1248 | u64_stats_update_end(&stats->syncp); | |
1249 | ||
1250 | netif_rx(skb); | |
1251 | ||
5cfccc5a | 1252 | return; |
d342894c | 1253 | drop: |
1254 | /* Consume bad packet */ | |
1255 | kfree_skb(skb); | |
d342894c | 1256 | } |
1257 | ||
e4f67add DS |
1258 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1259 | { | |
1260 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1261 | struct arphdr *parp; | |
1262 | u8 *arpptr, *sha; | |
1263 | __be32 sip, tip; | |
1264 | struct neighbour *n; | |
1265 | ||
1266 | if (dev->flags & IFF_NOARP) | |
1267 | goto out; | |
1268 | ||
1269 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1270 | dev->stats.tx_dropped++; | |
1271 | goto out; | |
1272 | } | |
1273 | parp = arp_hdr(skb); | |
1274 | ||
1275 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1276 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1277 | parp->ar_pro != htons(ETH_P_IP) || | |
1278 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1279 | parp->ar_hln != dev->addr_len || | |
1280 | parp->ar_pln != 4) | |
1281 | goto out; | |
1282 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1283 | sha = arpptr; | |
1284 | arpptr += dev->addr_len; /* sha */ | |
1285 | memcpy(&sip, arpptr, sizeof(sip)); | |
1286 | arpptr += sizeof(sip); | |
1287 | arpptr += dev->addr_len; /* tha */ | |
1288 | memcpy(&tip, arpptr, sizeof(tip)); | |
1289 | ||
1290 | if (ipv4_is_loopback(tip) || | |
1291 | ipv4_is_multicast(tip)) | |
1292 | goto out; | |
1293 | ||
1294 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1295 | ||
1296 | if (n) { | |
e4f67add DS |
1297 | struct vxlan_fdb *f; |
1298 | struct sk_buff *reply; | |
1299 | ||
1300 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1301 | neigh_release(n); | |
1302 | goto out; | |
1303 | } | |
1304 | ||
1305 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1306 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1307 | /* bridge-local neighbor */ |
1308 | neigh_release(n); | |
1309 | goto out; | |
1310 | } | |
1311 | ||
1312 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1313 | n->ha, sha); | |
1314 | ||
1315 | neigh_release(n); | |
1316 | ||
7346135d DS |
1317 | if (reply == NULL) |
1318 | goto out; | |
1319 | ||
e4f67add DS |
1320 | skb_reset_mac_header(reply); |
1321 | __skb_pull(reply, skb_network_offset(reply)); | |
1322 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1323 | reply->pkt_type = PACKET_HOST; | |
1324 | ||
1325 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1326 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1327 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1328 | union vxlan_addr ipa = { | |
1329 | .sin.sin_addr.s_addr = tip, | |
1330 | .sa.sa_family = AF_INET, | |
1331 | }; | |
1332 | ||
1333 | vxlan_ip_miss(dev, &ipa); | |
1334 | } | |
e4f67add DS |
1335 | out: |
1336 | consume_skb(skb); | |
1337 | return NETDEV_TX_OK; | |
1338 | } | |
1339 | ||
f564f45c | 1340 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1341 | |
1342 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, | |
1343 | struct neighbour *n, bool isrouter) | |
1344 | { | |
1345 | struct net_device *dev = request->dev; | |
1346 | struct sk_buff *reply; | |
1347 | struct nd_msg *ns, *na; | |
1348 | struct ipv6hdr *pip6; | |
1349 | u8 *daddr; | |
1350 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1351 | int ns_olen; | |
1352 | int i, len; | |
1353 | ||
1354 | if (dev == NULL) | |
1355 | return NULL; | |
1356 | ||
1357 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1358 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1359 | reply = alloc_skb(len, GFP_ATOMIC); | |
1360 | if (reply == NULL) | |
1361 | return NULL; | |
1362 | ||
1363 | reply->protocol = htons(ETH_P_IPV6); | |
1364 | reply->dev = dev; | |
1365 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1366 | skb_push(reply, sizeof(struct ethhdr)); | |
1367 | skb_set_mac_header(reply, 0); | |
1368 | ||
1369 | ns = (struct nd_msg *)skb_transport_header(request); | |
1370 | ||
1371 | daddr = eth_hdr(request)->h_source; | |
1372 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1373 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1374 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1375 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1376 | break; | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | /* Ethernet header */ | |
1381 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1382 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1383 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1384 | reply->protocol = htons(ETH_P_IPV6); | |
1385 | ||
1386 | skb_pull(reply, sizeof(struct ethhdr)); | |
1387 | skb_set_network_header(reply, 0); | |
1388 | skb_put(reply, sizeof(struct ipv6hdr)); | |
1389 | ||
1390 | /* IPv6 header */ | |
1391 | ||
1392 | pip6 = ipv6_hdr(reply); | |
1393 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1394 | pip6->version = 6; | |
1395 | pip6->priority = ipv6_hdr(request)->priority; | |
1396 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1397 | pip6->hop_limit = 255; | |
1398 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1399 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1400 | ||
1401 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
1402 | skb_set_transport_header(reply, 0); | |
1403 | ||
1404 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1405 | ||
1406 | /* Neighbor Advertisement */ | |
1407 | memset(na, 0, sizeof(*na)+na_olen); | |
1408 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1409 | na->icmph.icmp6_router = isrouter; | |
1410 | na->icmph.icmp6_override = 1; | |
1411 | na->icmph.icmp6_solicited = 1; | |
1412 | na->target = ns->target; | |
1413 | ether_addr_copy(&na->opt[2], n->ha); | |
1414 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1415 | na->opt[1] = na_olen >> 3; | |
1416 | ||
1417 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1418 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1419 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1420 | ||
1421 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1422 | ||
1423 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1424 | ||
1425 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1426 | ||
1427 | return reply; | |
1428 | } | |
1429 | ||
f564f45c CW |
1430 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1431 | { | |
1432 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1433 | struct nd_msg *msg; |
f564f45c CW |
1434 | const struct ipv6hdr *iphdr; |
1435 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1436 | struct neighbour *n; |
1437 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1438 | |
1439 | in6_dev = __in6_dev_get(dev); | |
1440 | if (!in6_dev) | |
1441 | goto out; | |
1442 | ||
1443 | if (!pskb_may_pull(skb, skb->len)) | |
1444 | goto out; | |
1445 | ||
1446 | iphdr = ipv6_hdr(skb); | |
1447 | saddr = &iphdr->saddr; | |
1448 | daddr = &iphdr->daddr; | |
1449 | ||
f564f45c CW |
1450 | msg = (struct nd_msg *)skb_transport_header(skb); |
1451 | if (msg->icmph.icmp6_code != 0 || | |
1452 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1453 | goto out; | |
1454 | ||
4b29dba9 DS |
1455 | if (ipv6_addr_loopback(daddr) || |
1456 | ipv6_addr_is_multicast(&msg->target)) | |
1457 | goto out; | |
1458 | ||
1459 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1460 | |
1461 | if (n) { | |
1462 | struct vxlan_fdb *f; | |
4b29dba9 | 1463 | struct sk_buff *reply; |
f564f45c CW |
1464 | |
1465 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1466 | neigh_release(n); | |
1467 | goto out; | |
1468 | } | |
1469 | ||
1470 | f = vxlan_find_mac(vxlan, n->ha); | |
1471 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1472 | /* bridge-local neighbor */ | |
1473 | neigh_release(n); | |
1474 | goto out; | |
1475 | } | |
1476 | ||
4b29dba9 DS |
1477 | reply = vxlan_na_create(skb, n, |
1478 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1479 | ||
f564f45c | 1480 | neigh_release(n); |
4b29dba9 DS |
1481 | |
1482 | if (reply == NULL) | |
1483 | goto out; | |
1484 | ||
1485 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1486 | dev->stats.rx_dropped++; | |
1487 | ||
f564f45c | 1488 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1489 | union vxlan_addr ipa = { |
1490 | .sin6.sin6_addr = msg->target, | |
1491 | .sa.sa_family = AF_INET6, | |
1492 | }; | |
1493 | ||
f564f45c CW |
1494 | vxlan_ip_miss(dev, &ipa); |
1495 | } | |
1496 | ||
1497 | out: | |
1498 | consume_skb(skb); | |
1499 | return NETDEV_TX_OK; | |
1500 | } | |
1501 | #endif | |
1502 | ||
e4f67add DS |
1503 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1504 | { | |
1505 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1506 | struct neighbour *n; | |
e4f67add DS |
1507 | |
1508 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1509 | return false; | |
1510 | ||
1511 | n = NULL; | |
1512 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1513 | case ETH_P_IP: | |
e15a00aa CW |
1514 | { |
1515 | struct iphdr *pip; | |
1516 | ||
e4f67add DS |
1517 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1518 | return false; | |
1519 | pip = ip_hdr(skb); | |
1520 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1521 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1522 | union vxlan_addr ipa = { | |
1523 | .sin.sin_addr.s_addr = pip->daddr, | |
1524 | .sa.sa_family = AF_INET, | |
1525 | }; | |
1526 | ||
1527 | vxlan_ip_miss(dev, &ipa); | |
1528 | return false; | |
1529 | } | |
1530 | ||
e4f67add | 1531 | break; |
e15a00aa CW |
1532 | } |
1533 | #if IS_ENABLED(CONFIG_IPV6) | |
1534 | case ETH_P_IPV6: | |
1535 | { | |
1536 | struct ipv6hdr *pip6; | |
1537 | ||
1538 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1539 | return false; | |
1540 | pip6 = ipv6_hdr(skb); | |
1541 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1542 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1543 | union vxlan_addr ipa = { | |
1544 | .sin6.sin6_addr = pip6->daddr, | |
1545 | .sa.sa_family = AF_INET6, | |
1546 | }; | |
1547 | ||
1548 | vxlan_ip_miss(dev, &ipa); | |
1549 | return false; | |
1550 | } | |
1551 | ||
1552 | break; | |
1553 | } | |
1554 | #endif | |
e4f67add DS |
1555 | default: |
1556 | return false; | |
1557 | } | |
1558 | ||
1559 | if (n) { | |
1560 | bool diff; | |
1561 | ||
7367d0b5 | 1562 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1563 | if (diff) { |
1564 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1565 | dev->addr_len); | |
1566 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1567 | } | |
1568 | neigh_release(n); | |
1569 | return diff; | |
e4c7ed41 CW |
1570 | } |
1571 | ||
e4f67add DS |
1572 | return false; |
1573 | } | |
1574 | ||
359a0ea9 TH |
1575 | static inline struct sk_buff *vxlan_handle_offloads(struct sk_buff *skb, |
1576 | bool udp_csum) | |
05c0db08 | 1577 | { |
359a0ea9 TH |
1578 | int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1579 | return iptunnel_handle_offloads(skb, udp_csum, type); | |
05c0db08 PS |
1580 | } |
1581 | ||
e4c7ed41 | 1582 | #if IS_ENABLED(CONFIG_IPV6) |
11796187 | 1583 | static int vxlan6_xmit_skb(struct vxlan_sock *vs, |
e4c7ed41 CW |
1584 | struct dst_entry *dst, struct sk_buff *skb, |
1585 | struct net_device *dev, struct in6_addr *saddr, | |
1586 | struct in6_addr *daddr, __u8 prio, __u8 ttl, | |
f01ec1c0 ND |
1587 | __be16 src_port, __be16 dst_port, __be32 vni, |
1588 | bool xnet) | |
e4c7ed41 CW |
1589 | { |
1590 | struct ipv6hdr *ip6h; | |
1591 | struct vxlanhdr *vxh; | |
1592 | struct udphdr *uh; | |
1593 | int min_headroom; | |
1594 | int err; | |
1595 | ||
359a0ea9 TH |
1596 | skb = vxlan_handle_offloads(skb, !udp_get_no_check6_tx(vs->sock->sk)); |
1597 | if (IS_ERR(skb)) | |
1598 | return -EINVAL; | |
e4c7ed41 | 1599 | |
f01ec1c0 | 1600 | skb_scrub_packet(skb, xnet); |
963a88b3 | 1601 | |
e4c7ed41 CW |
1602 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
1603 | + VXLAN_HLEN + sizeof(struct ipv6hdr) | |
1604 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
1605 | ||
1606 | /* Need space for new headers (invalidates iph ptr) */ | |
1607 | err = skb_cow_head(skb, min_headroom); | |
1608 | if (unlikely(err)) | |
1609 | return err; | |
1610 | ||
1611 | if (vlan_tx_tag_present(skb)) { | |
1612 | if (WARN_ON(!__vlan_put_tag(skb, | |
1613 | skb->vlan_proto, | |
1614 | vlan_tx_tag_get(skb)))) | |
1615 | return -ENOMEM; | |
1616 | ||
1617 | skb->vlan_tci = 0; | |
1618 | } | |
1619 | ||
1620 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); | |
1621 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1622 | vxh->vx_vni = vni; | |
1623 | ||
1624 | __skb_push(skb, sizeof(*uh)); | |
1625 | skb_reset_transport_header(skb); | |
1626 | uh = udp_hdr(skb); | |
1627 | ||
1628 | uh->dest = dst_port; | |
1629 | uh->source = src_port; | |
1630 | ||
1631 | uh->len = htons(skb->len); | |
e4c7ed41 CW |
1632 | |
1633 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); | |
1634 | IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | | |
1635 | IPSKB_REROUTED); | |
e4c7ed41 CW |
1636 | skb_dst_set(skb, dst); |
1637 | ||
359a0ea9 TH |
1638 | udp6_set_csum(udp_get_no_check6_tx(vs->sock->sk), skb, |
1639 | saddr, daddr, skb->len); | |
e4c7ed41 CW |
1640 | |
1641 | __skb_push(skb, sizeof(*ip6h)); | |
1642 | skb_reset_network_header(skb); | |
1643 | ip6h = ipv6_hdr(skb); | |
1644 | ip6h->version = 6; | |
1645 | ip6h->priority = prio; | |
1646 | ip6h->flow_lbl[0] = 0; | |
1647 | ip6h->flow_lbl[1] = 0; | |
1648 | ip6h->flow_lbl[2] = 0; | |
1649 | ip6h->payload_len = htons(skb->len); | |
1650 | ip6h->nexthdr = IPPROTO_UDP; | |
1651 | ip6h->hop_limit = ttl; | |
1652 | ip6h->daddr = *daddr; | |
1653 | ip6h->saddr = *saddr; | |
1654 | ||
e4c7ed41 CW |
1655 | ip6tunnel_xmit(skb, dev); |
1656 | return 0; | |
1657 | } | |
1658 | #endif | |
1659 | ||
11796187 | 1660 | int vxlan_xmit_skb(struct vxlan_sock *vs, |
49560532 PS |
1661 | struct rtable *rt, struct sk_buff *skb, |
1662 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, | |
f01ec1c0 | 1663 | __be16 src_port, __be16 dst_port, __be32 vni, bool xnet) |
49560532 PS |
1664 | { |
1665 | struct vxlanhdr *vxh; | |
1666 | struct udphdr *uh; | |
649c5b8b | 1667 | int min_headroom; |
49560532 PS |
1668 | int err; |
1669 | ||
359a0ea9 TH |
1670 | skb = vxlan_handle_offloads(skb, !vs->sock->sk->sk_no_check_tx); |
1671 | if (IS_ERR(skb)) | |
1672 | return -EINVAL; | |
49560532 | 1673 | |
649c5b8b | 1674 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 PS |
1675 | + VXLAN_HLEN + sizeof(struct iphdr) |
1676 | + (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0); | |
649c5b8b PS |
1677 | |
1678 | /* Need space for new headers (invalidates iph ptr) */ | |
1679 | err = skb_cow_head(skb, min_headroom); | |
1680 | if (unlikely(err)) | |
1681 | return err; | |
1682 | ||
1eaa8178 PS |
1683 | if (vlan_tx_tag_present(skb)) { |
1684 | if (WARN_ON(!__vlan_put_tag(skb, | |
1685 | skb->vlan_proto, | |
1686 | vlan_tx_tag_get(skb)))) | |
1687 | return -ENOMEM; | |
1688 | ||
1689 | skb->vlan_tci = 0; | |
1690 | } | |
1691 | ||
49560532 PS |
1692 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
1693 | vxh->vx_flags = htonl(VXLAN_FLAGS); | |
1694 | vxh->vx_vni = vni; | |
1695 | ||
1696 | __skb_push(skb, sizeof(*uh)); | |
1697 | skb_reset_transport_header(skb); | |
1698 | uh = udp_hdr(skb); | |
1699 | ||
1700 | uh->dest = dst_port; | |
1701 | uh->source = src_port; | |
1702 | ||
1703 | uh->len = htons(skb->len); | |
49560532 | 1704 | |
359a0ea9 TH |
1705 | udp_set_csum(vs->sock->sk->sk_no_check_tx, skb, |
1706 | src, dst, skb->len); | |
49560532 | 1707 | |
aad88724 | 1708 | return iptunnel_xmit(vs->sock->sk, rt, skb, src, dst, IPPROTO_UDP, |
f01ec1c0 | 1709 | tos, ttl, df, xnet); |
49560532 PS |
1710 | } |
1711 | EXPORT_SYMBOL_GPL(vxlan_xmit_skb); | |
1712 | ||
9dcc71e1 SS |
1713 | /* Bypass encapsulation if the destination is local */ |
1714 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1715 | struct vxlan_dev *dst_vxlan) | |
1716 | { | |
8f84985f | 1717 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1718 | union vxlan_addr loopback; |
1719 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
9dcc71e1 | 1720 | |
8f84985f LR |
1721 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1722 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1723 | skb->pkt_type = PACKET_HOST; |
1724 | skb->encapsulation = 0; | |
1725 | skb->dev = dst_vxlan->dev; | |
1726 | __skb_pull(skb, skb_network_offset(skb)); | |
1727 | ||
e4c7ed41 CW |
1728 | if (remote_ip->sa.sa_family == AF_INET) { |
1729 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1730 | loopback.sa.sa_family = AF_INET; | |
1731 | #if IS_ENABLED(CONFIG_IPV6) | |
1732 | } else { | |
1733 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1734 | loopback.sa.sa_family = AF_INET6; | |
1735 | #endif | |
1736 | } | |
1737 | ||
9dcc71e1 | 1738 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1739 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1740 | |
1741 | u64_stats_update_begin(&tx_stats->syncp); | |
1742 | tx_stats->tx_packets++; | |
1743 | tx_stats->tx_bytes += skb->len; | |
1744 | u64_stats_update_end(&tx_stats->syncp); | |
1745 | ||
1746 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1747 | u64_stats_update_begin(&rx_stats->syncp); | |
1748 | rx_stats->rx_packets++; | |
1749 | rx_stats->rx_bytes += skb->len; | |
1750 | u64_stats_update_end(&rx_stats->syncp); | |
1751 | } else { | |
1752 | skb->dev->stats.rx_dropped++; | |
1753 | } | |
1754 | } | |
1755 | ||
4ad16930 SH |
1756 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1757 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1758 | { |
1759 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
e4c7ed41 | 1760 | struct rtable *rt = NULL; |
d342894c | 1761 | const struct iphdr *old_iph; |
d342894c | 1762 | struct flowi4 fl4; |
e4c7ed41 CW |
1763 | union vxlan_addr *dst; |
1764 | __be16 src_port = 0, dst_port; | |
234f5b73 | 1765 | u32 vni; |
d342894c | 1766 | __be16 df = 0; |
1767 | __u8 tos, ttl; | |
0e6fbc5b | 1768 | int err; |
d342894c | 1769 | |
823aa873 | 1770 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; |
6681712d | 1771 | vni = rdst->remote_vni; |
e4c7ed41 | 1772 | dst = &rdst->remote_ip; |
e4f67add | 1773 | |
e4c7ed41 | 1774 | if (vxlan_addr_any(dst)) { |
e4f67add | 1775 | if (did_rsc) { |
e4f67add | 1776 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1777 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1778 | return; |
e4f67add | 1779 | } |
ef59febe | 1780 | goto drop; |
e4f67add | 1781 | } |
ef59febe | 1782 | |
d342894c | 1783 | old_iph = ip_hdr(skb); |
1784 | ||
d342894c | 1785 | ttl = vxlan->ttl; |
e4c7ed41 | 1786 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1787 | ttl = 1; |
1788 | ||
1789 | tos = vxlan->tos; | |
1790 | if (tos == 1) | |
206aaafc | 1791 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1792 | |
535fb8d0 TH |
1793 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->port_min, |
1794 | vxlan->port_max, true); | |
d342894c | 1795 | |
e4c7ed41 CW |
1796 | if (dst->sa.sa_family == AF_INET) { |
1797 | memset(&fl4, 0, sizeof(fl4)); | |
1798 | fl4.flowi4_oif = rdst->remote_ifindex; | |
1799 | fl4.flowi4_tos = RT_TOS(tos); | |
1800 | fl4.daddr = dst->sin.sin_addr.s_addr; | |
1801 | fl4.saddr = vxlan->saddr.sin.sin_addr.s_addr; | |
1802 | ||
f01ec1c0 | 1803 | rt = ip_route_output_key(vxlan->net, &fl4); |
e4c7ed41 CW |
1804 | if (IS_ERR(rt)) { |
1805 | netdev_dbg(dev, "no route to %pI4\n", | |
1806 | &dst->sin.sin_addr.s_addr); | |
1807 | dev->stats.tx_carrier_errors++; | |
1808 | goto tx_error; | |
1809 | } | |
d342894c | 1810 | |
e4c7ed41 CW |
1811 | if (rt->dst.dev == dev) { |
1812 | netdev_dbg(dev, "circular route to %pI4\n", | |
1813 | &dst->sin.sin_addr.s_addr); | |
1814 | dev->stats.collisions++; | |
fffc15a5 | 1815 | goto rt_tx_error; |
e4c7ed41 CW |
1816 | } |
1817 | ||
1818 | /* Bypass encapsulation if the destination is local */ | |
1819 | if (rt->rt_flags & RTCF_LOCAL && | |
1820 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1821 | struct vxlan_dev *dst_vxlan; | |
1822 | ||
1823 | ip_rt_put(rt); | |
f01ec1c0 | 1824 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, dst_port); |
e4c7ed41 CW |
1825 | if (!dst_vxlan) |
1826 | goto tx_error; | |
1827 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1828 | return; | |
1829 | } | |
1830 | ||
1831 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); | |
1832 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
d342894c | 1833 | |
11796187 | 1834 | err = vxlan_xmit_skb(vxlan->vn_sock, rt, skb, |
e4c7ed41 CW |
1835 | fl4.saddr, dst->sin.sin_addr.s_addr, |
1836 | tos, ttl, df, src_port, dst_port, | |
f01ec1c0 ND |
1837 | htonl(vni << 8), |
1838 | !net_eq(vxlan->net, dev_net(vxlan->dev))); | |
9dcc71e1 | 1839 | |
e4c7ed41 CW |
1840 | if (err < 0) |
1841 | goto rt_tx_error; | |
1842 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); | |
1843 | #if IS_ENABLED(CONFIG_IPV6) | |
1844 | } else { | |
1845 | struct sock *sk = vxlan->vn_sock->sock->sk; | |
1846 | struct dst_entry *ndst; | |
1847 | struct flowi6 fl6; | |
1848 | u32 flags; | |
1849 | ||
1850 | memset(&fl6, 0, sizeof(fl6)); | |
1851 | fl6.flowi6_oif = rdst->remote_ifindex; | |
1852 | fl6.daddr = dst->sin6.sin6_addr; | |
1853 | fl6.saddr = vxlan->saddr.sin6.sin6_addr; | |
8c1bb79f | 1854 | fl6.flowi6_proto = IPPROTO_UDP; |
e4c7ed41 CW |
1855 | |
1856 | if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) { | |
1857 | netdev_dbg(dev, "no route to %pI6\n", | |
1858 | &dst->sin6.sin6_addr); | |
1859 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 1860 | goto tx_error; |
e4c7ed41 | 1861 | } |
d342894c | 1862 | |
e4c7ed41 CW |
1863 | if (ndst->dev == dev) { |
1864 | netdev_dbg(dev, "circular route to %pI6\n", | |
1865 | &dst->sin6.sin6_addr); | |
1866 | dst_release(ndst); | |
1867 | dev->stats.collisions++; | |
1868 | goto tx_error; | |
1869 | } | |
0e6fbc5b | 1870 | |
e4c7ed41 CW |
1871 | /* Bypass encapsulation if the destination is local */ |
1872 | flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
1873 | if (flags & RTF_LOCAL && | |
1874 | !(flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1875 | struct vxlan_dev *dst_vxlan; | |
1876 | ||
1877 | dst_release(ndst); | |
f01ec1c0 | 1878 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, dst_port); |
e4c7ed41 CW |
1879 | if (!dst_vxlan) |
1880 | goto tx_error; | |
1881 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1882 | return; | |
1883 | } | |
49560532 | 1884 | |
e4c7ed41 CW |
1885 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
1886 | ||
11796187 | 1887 | err = vxlan6_xmit_skb(vxlan->vn_sock, ndst, skb, |
e4c7ed41 | 1888 | dev, &fl6.saddr, &fl6.daddr, 0, ttl, |
f01ec1c0 ND |
1889 | src_port, dst_port, htonl(vni << 8), |
1890 | !net_eq(vxlan->net, dev_net(vxlan->dev))); | |
e4c7ed41 CW |
1891 | #endif |
1892 | } | |
0e6fbc5b | 1893 | |
4ad16930 | 1894 | return; |
d342894c | 1895 | |
1896 | drop: | |
1897 | dev->stats.tx_dropped++; | |
1898 | goto tx_free; | |
1899 | ||
49560532 PS |
1900 | rt_tx_error: |
1901 | ip_rt_put(rt); | |
d342894c | 1902 | tx_error: |
1903 | dev->stats.tx_errors++; | |
1904 | tx_free: | |
1905 | dev_kfree_skb(skb); | |
d342894c | 1906 | } |
1907 | ||
6681712d DS |
1908 | /* Transmit local packets over Vxlan |
1909 | * | |
1910 | * Outer IP header inherits ECN and DF from inner header. | |
1911 | * Outer UDP destination is the VXLAN assigned port. | |
1912 | * source port is based on hash of flow | |
1913 | */ | |
1914 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
1915 | { | |
1916 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1917 | struct ethhdr *eth; | |
1918 | bool did_rsc = false; | |
8f646c92 | 1919 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 1920 | struct vxlan_fdb *f; |
6681712d DS |
1921 | |
1922 | skb_reset_mac_header(skb); | |
1923 | eth = eth_hdr(skb); | |
1924 | ||
f564f45c CW |
1925 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
1926 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
1927 | return arp_reduce(dev, skb); | |
1928 | #if IS_ENABLED(CONFIG_IPV6) | |
1929 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
1930 | skb->len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) && | |
1931 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { | |
1932 | struct nd_msg *msg; | |
1933 | ||
1934 | msg = (struct nd_msg *)skb_transport_header(skb); | |
1935 | if (msg->icmph.icmp6_code == 0 && | |
1936 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
1937 | return neigh_reduce(dev, skb); | |
1938 | } | |
1939 | #endif | |
1940 | } | |
6681712d DS |
1941 | |
1942 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
ae884082 DS |
1943 | did_rsc = false; |
1944 | ||
1945 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
1946 | (ntohs(eth->h_proto) == ETH_P_IP || |
1947 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
1948 | did_rsc = route_shortcircuit(dev, skb); |
1949 | if (did_rsc) | |
1950 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
1951 | } | |
1952 | ||
6681712d | 1953 | if (f == NULL) { |
afbd8bae MR |
1954 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
1955 | if (f == NULL) { | |
1956 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
1957 | !is_multicast_ether_addr(eth->h_dest)) | |
1958 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
1959 | ||
1960 | dev->stats.tx_dropped++; | |
8f646c92 | 1961 | kfree_skb(skb); |
afbd8bae MR |
1962 | return NETDEV_TX_OK; |
1963 | } | |
1964 | } | |
6681712d | 1965 | |
afbd8bae MR |
1966 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
1967 | struct sk_buff *skb1; | |
6681712d | 1968 | |
8f646c92 ED |
1969 | if (!fdst) { |
1970 | fdst = rdst; | |
1971 | continue; | |
1972 | } | |
afbd8bae MR |
1973 | skb1 = skb_clone(skb, GFP_ATOMIC); |
1974 | if (skb1) | |
1975 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
1976 | } |
1977 | ||
8f646c92 ED |
1978 | if (fdst) |
1979 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
1980 | else | |
1981 | kfree_skb(skb); | |
4ad16930 | 1982 | return NETDEV_TX_OK; |
6681712d DS |
1983 | } |
1984 | ||
d342894c | 1985 | /* Walk the forwarding table and purge stale entries */ |
1986 | static void vxlan_cleanup(unsigned long arg) | |
1987 | { | |
1988 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
1989 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
1990 | unsigned int h; | |
1991 | ||
1992 | if (!netif_running(vxlan->dev)) | |
1993 | return; | |
1994 | ||
1995 | spin_lock_bh(&vxlan->hash_lock); | |
1996 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1997 | struct hlist_node *p, *n; | |
1998 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
1999 | struct vxlan_fdb *f | |
2000 | = container_of(p, struct vxlan_fdb, hlist); | |
2001 | unsigned long timeout; | |
2002 | ||
3c172868 | 2003 | if (f->state & NUD_PERMANENT) |
d342894c | 2004 | continue; |
2005 | ||
2006 | timeout = f->used + vxlan->age_interval * HZ; | |
2007 | if (time_before_eq(timeout, jiffies)) { | |
2008 | netdev_dbg(vxlan->dev, | |
2009 | "garbage collect %pM\n", | |
2010 | f->eth_addr); | |
2011 | f->state = NUD_STALE; | |
2012 | vxlan_fdb_destroy(vxlan, f); | |
2013 | } else if (time_before(timeout, next_timer)) | |
2014 | next_timer = timeout; | |
2015 | } | |
2016 | } | |
2017 | spin_unlock_bh(&vxlan->hash_lock); | |
2018 | ||
2019 | mod_timer(&vxlan->age_timer, next_timer); | |
2020 | } | |
2021 | ||
9c2e24e1 PS |
2022 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2023 | { | |
2024 | __u32 vni = vxlan->default_dst.remote_vni; | |
2025 | ||
2026 | vxlan->vn_sock = vs; | |
2027 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); | |
2028 | } | |
2029 | ||
d342894c | 2030 | /* Setup stats when device is created */ |
2031 | static int vxlan_init(struct net_device *dev) | |
2032 | { | |
1c51a915 | 2033 | struct vxlan_dev *vxlan = netdev_priv(dev); |
f01ec1c0 | 2034 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2035 | struct vxlan_sock *vs; |
1c51a915 | 2036 | |
1c213bd2 | 2037 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2038 | if (!dev->tstats) |
d342894c | 2039 | return -ENOMEM; |
2040 | ||
1c51a915 | 2041 | spin_lock(&vn->sock_lock); |
f01ec1c0 | 2042 | vs = vxlan_find_sock(vxlan->net, vxlan->dst_port); |
1c51a915 SH |
2043 | if (vs) { |
2044 | /* If we have a socket with same port already, reuse it */ | |
2045 | atomic_inc(&vs->refcnt); | |
9c2e24e1 | 2046 | vxlan_vs_add_dev(vs, vxlan); |
1c51a915 SH |
2047 | } else { |
2048 | /* otherwise make new socket outside of RTNL */ | |
2049 | dev_hold(dev); | |
2050 | queue_work(vxlan_wq, &vxlan->sock_work); | |
2051 | } | |
2052 | spin_unlock(&vn->sock_lock); | |
2053 | ||
d342894c | 2054 | return 0; |
2055 | } | |
2056 | ||
ba609e9b | 2057 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2058 | { |
2059 | struct vxlan_fdb *f; | |
2060 | ||
2061 | spin_lock_bh(&vxlan->hash_lock); | |
2062 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2063 | if (f) | |
2064 | vxlan_fdb_destroy(vxlan, f); | |
2065 | spin_unlock_bh(&vxlan->hash_lock); | |
2066 | } | |
2067 | ||
ebf4063e SH |
2068 | static void vxlan_uninit(struct net_device *dev) |
2069 | { | |
2070 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e SH |
2071 | struct vxlan_sock *vs = vxlan->vn_sock; |
2072 | ||
ba609e9b | 2073 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2074 | |
ebf4063e | 2075 | if (vs) |
012a5729 | 2076 | vxlan_sock_release(vs); |
ebf4063e SH |
2077 | free_percpu(dev->tstats); |
2078 | } | |
2079 | ||
d342894c | 2080 | /* Start ageing timer and join group when device is brought up */ |
2081 | static int vxlan_open(struct net_device *dev) | |
2082 | { | |
2083 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1c51a915 SH |
2084 | struct vxlan_sock *vs = vxlan->vn_sock; |
2085 | ||
2086 | /* socket hasn't been created */ | |
2087 | if (!vs) | |
2088 | return -ENOTCONN; | |
d342894c | 2089 | |
79d4a94f | 2090 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
1c51a915 | 2091 | vxlan_sock_hold(vs); |
7c47cedf | 2092 | dev_hold(dev); |
3fc2de2f | 2093 | queue_work(vxlan_wq, &vxlan->igmp_join); |
d342894c | 2094 | } |
2095 | ||
2096 | if (vxlan->age_interval) | |
2097 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
2098 | ||
2099 | return 0; | |
2100 | } | |
2101 | ||
2102 | /* Purge the forwarding table */ | |
2103 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2104 | { | |
31fec5aa | 2105 | unsigned int h; |
d342894c | 2106 | |
2107 | spin_lock_bh(&vxlan->hash_lock); | |
2108 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2109 | struct hlist_node *p, *n; | |
2110 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2111 | struct vxlan_fdb *f | |
2112 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2113 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2114 | if (!is_zero_ether_addr(f->eth_addr)) | |
2115 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2116 | } |
2117 | } | |
2118 | spin_unlock_bh(&vxlan->hash_lock); | |
2119 | } | |
2120 | ||
2121 | /* Cleanup timer and forwarding table on shutdown */ | |
2122 | static int vxlan_stop(struct net_device *dev) | |
2123 | { | |
2124 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2125 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2126 | struct vxlan_sock *vs = vxlan->vn_sock; |
d342894c | 2127 | |
e4c7ed41 | 2128 | if (vs && vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
95ab0991 | 2129 | !vxlan_group_used(vn, vxlan)) { |
1c51a915 | 2130 | vxlan_sock_hold(vs); |
7c47cedf | 2131 | dev_hold(dev); |
3fc2de2f | 2132 | queue_work(vxlan_wq, &vxlan->igmp_leave); |
7c47cedf | 2133 | } |
d342894c | 2134 | |
2135 | del_timer_sync(&vxlan->age_timer); | |
2136 | ||
2137 | vxlan_flush(vxlan); | |
2138 | ||
2139 | return 0; | |
2140 | } | |
2141 | ||
d342894c | 2142 | /* Stub, nothing needs to be done. */ |
2143 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2144 | { | |
2145 | } | |
2146 | ||
345010b5 DB |
2147 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2148 | { | |
2149 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2150 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2151 | struct net_device *lowerdev; | |
2152 | int max_mtu; | |
2153 | ||
f01ec1c0 | 2154 | lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex); |
345010b5 DB |
2155 | if (lowerdev == NULL) |
2156 | return eth_change_mtu(dev, new_mtu); | |
2157 | ||
2158 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
2159 | max_mtu = lowerdev->mtu - VXLAN6_HEADROOM; | |
2160 | else | |
2161 | max_mtu = lowerdev->mtu - VXLAN_HEADROOM; | |
2162 | ||
2163 | if (new_mtu < 68 || new_mtu > max_mtu) | |
2164 | return -EINVAL; | |
2165 | ||
2166 | dev->mtu = new_mtu; | |
2167 | return 0; | |
2168 | } | |
2169 | ||
d342894c | 2170 | static const struct net_device_ops vxlan_netdev_ops = { |
2171 | .ndo_init = vxlan_init, | |
ebf4063e | 2172 | .ndo_uninit = vxlan_uninit, |
d342894c | 2173 | .ndo_open = vxlan_open, |
2174 | .ndo_stop = vxlan_stop, | |
2175 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2176 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2177 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2178 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2179 | .ndo_validate_addr = eth_validate_addr, |
2180 | .ndo_set_mac_address = eth_mac_addr, | |
2181 | .ndo_fdb_add = vxlan_fdb_add, | |
2182 | .ndo_fdb_del = vxlan_fdb_delete, | |
2183 | .ndo_fdb_dump = vxlan_fdb_dump, | |
2184 | }; | |
2185 | ||
2186 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2187 | static struct device_type vxlan_type = { | |
2188 | .name = "vxlan", | |
2189 | }; | |
2190 | ||
53cf5275 | 2191 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2192 | * supply the listening VXLAN udp ports. Callers are expected |
2193 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2194 | */ |
2195 | void vxlan_get_rx_port(struct net_device *dev) | |
2196 | { | |
2197 | struct vxlan_sock *vs; | |
2198 | struct net *net = dev_net(dev); | |
2199 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2200 | sa_family_t sa_family; | |
35e42379 JG |
2201 | __be16 port; |
2202 | unsigned int i; | |
53cf5275 JG |
2203 | |
2204 | spin_lock(&vn->sock_lock); | |
2205 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2206 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2207 | port = inet_sk(vs->sock->sk)->inet_sport; | |
53cf5275 JG |
2208 | sa_family = vs->sock->sk->sk_family; |
2209 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
2210 | port); | |
2211 | } | |
2212 | } | |
2213 | spin_unlock(&vn->sock_lock); | |
2214 | } | |
2215 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2216 | ||
d342894c | 2217 | /* Initialize the device structure. */ |
2218 | static void vxlan_setup(struct net_device *dev) | |
2219 | { | |
2220 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2221 | unsigned int h; |
d342894c | 2222 | |
2223 | eth_hw_addr_random(dev); | |
2224 | ether_setup(dev); | |
e4c7ed41 | 2225 | if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6) |
2853af6a | 2226 | dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM; |
e4c7ed41 | 2227 | else |
2853af6a | 2228 | dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM; |
d342894c | 2229 | |
2230 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 2231 | dev->destructor = free_netdev; |
d342894c | 2232 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2233 | ||
2234 | dev->tx_queue_len = 0; | |
2235 | dev->features |= NETIF_F_LLTX; | |
d6727fe3 | 2236 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2237 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2238 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2239 | |
1eaa8178 PS |
2240 | dev->vlan_features = dev->features; |
2241 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2242 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2243 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2244 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
d342894c | 2245 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
6602d007 | 2246 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 2247 | |
553675fb | 2248 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2249 | spin_lock_init(&vxlan->hash_lock); |
3fc2de2f | 2250 | INIT_WORK(&vxlan->igmp_join, vxlan_igmp_join); |
2251 | INIT_WORK(&vxlan->igmp_leave, vxlan_igmp_leave); | |
1c51a915 | 2252 | INIT_WORK(&vxlan->sock_work, vxlan_sock_work); |
d342894c | 2253 | |
2254 | init_timer_deferrable(&vxlan->age_timer); | |
2255 | vxlan->age_timer.function = vxlan_cleanup; | |
2256 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2257 | ||
823aa873 | 2258 | vxlan->dst_port = htons(vxlan_port); |
05f47d69 | 2259 | |
d342894c | 2260 | vxlan->dev = dev; |
2261 | ||
2262 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
2263 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2264 | } | |
2265 | ||
2266 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
2267 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2268 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2269 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2270 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2271 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2272 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2273 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2274 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
2275 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
2276 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2277 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2278 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2279 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2280 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2281 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2282 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
823aa873 | 2283 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
d342894c | 2284 | }; |
2285 | ||
2286 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2287 | { | |
2288 | if (tb[IFLA_ADDRESS]) { | |
2289 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2290 | pr_debug("invalid link address (not ethernet)\n"); | |
2291 | return -EINVAL; | |
2292 | } | |
2293 | ||
2294 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2295 | pr_debug("invalid all zero ethernet address\n"); | |
2296 | return -EADDRNOTAVAIL; | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | if (!data) | |
2301 | return -EINVAL; | |
2302 | ||
2303 | if (data[IFLA_VXLAN_ID]) { | |
2304 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2305 | if (id >= VXLAN_VID_MASK) | |
2306 | return -ERANGE; | |
2307 | } | |
2308 | ||
05f47d69 | 2309 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2310 | const struct ifla_vxlan_port_range *p | |
2311 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2312 | ||
2313 | if (ntohs(p->high) < ntohs(p->low)) { | |
2314 | pr_debug("port range %u .. %u not valid\n", | |
2315 | ntohs(p->low), ntohs(p->high)); | |
2316 | return -EINVAL; | |
2317 | } | |
2318 | } | |
2319 | ||
d342894c | 2320 | return 0; |
2321 | } | |
2322 | ||
1b13c97f YB |
2323 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2324 | struct ethtool_drvinfo *drvinfo) | |
2325 | { | |
2326 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2327 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2328 | } | |
2329 | ||
2330 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2331 | .get_drvinfo = vxlan_get_drvinfo, | |
2332 | .get_link = ethtool_op_get_link, | |
2333 | }; | |
2334 | ||
553675fb | 2335 | static void vxlan_del_work(struct work_struct *work) |
2336 | { | |
2337 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
2338 | ||
2339 | sk_release_kernel(vs->sock->sk); | |
2340 | kfree_rcu(vs, rcu); | |
2341 | } | |
2342 | ||
3ee64f39 TH |
2343 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2344 | __be16 port, u32 flags) | |
553675fb | 2345 | { |
e4c7ed41 | 2346 | struct socket *sock; |
3ee64f39 TH |
2347 | struct udp_port_cfg udp_conf; |
2348 | int err; | |
e4c7ed41 | 2349 | |
3ee64f39 | 2350 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2351 | |
3ee64f39 TH |
2352 | if (ipv6) { |
2353 | udp_conf.family = AF_INET6; | |
2354 | udp_conf.use_udp6_tx_checksums = | |
2355 | !!(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); | |
2356 | udp_conf.use_udp6_rx_checksums = | |
2357 | !!(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); | |
2358 | } else { | |
2359 | udp_conf.family = AF_INET; | |
2360 | udp_conf.local_ip.s_addr = INADDR_ANY; | |
2361 | udp_conf.use_udp_checksums = | |
2362 | !!(flags & VXLAN_F_UDP_CSUM); | |
e4c7ed41 | 2363 | } |
e4c7ed41 | 2364 | |
3ee64f39 | 2365 | udp_conf.local_udp_port = port; |
553675fb | 2366 | |
3ee64f39 TH |
2367 | /* Open UDP socket */ |
2368 | err = udp_sock_create(net, &udp_conf, &sock); | |
2369 | if (err < 0) | |
2370 | return ERR_PTR(err); | |
e4c7ed41 | 2371 | |
e4c7ed41 | 2372 | /* Disable multicast loopback */ |
3ee64f39 | 2373 | inet_sk(sock->sk)->mc_loop = 0; |
359a0ea9 | 2374 | |
39deb2c7 | 2375 | return sock; |
e4c7ed41 CW |
2376 | } |
2377 | ||
2378 | /* Create new listen socket if needed */ | |
2379 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, | |
359a0ea9 TH |
2380 | vxlan_rcv_t *rcv, void *data, |
2381 | u32 flags) | |
e4c7ed41 CW |
2382 | { |
2383 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2384 | struct vxlan_sock *vs; | |
2385 | struct socket *sock; | |
2386 | struct sock *sk; | |
e4c7ed41 | 2387 | unsigned int h; |
359a0ea9 | 2388 | bool ipv6 = !!(flags & VXLAN_F_IPV6); |
e4c7ed41 | 2389 | |
dc01e7d3 | 2390 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2391 | if (!vs) |
2392 | return ERR_PTR(-ENOMEM); | |
2393 | ||
2394 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2395 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2396 | ||
2397 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2398 | ||
3ee64f39 | 2399 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 2400 | if (IS_ERR(sock)) { |
553675fb | 2401 | kfree(vs); |
e50fddc8 | 2402 | return ERR_CAST(sock); |
553675fb | 2403 | } |
e4c7ed41 CW |
2404 | |
2405 | vs->sock = sock; | |
2406 | sk = sock->sk; | |
9c2e24e1 | 2407 | atomic_set(&vs->refcnt, 1); |
5cfccc5a | 2408 | vs->rcv = rcv; |
012a5729 | 2409 | vs->data = data; |
559835ea | 2410 | rcu_assign_sk_user_data(vs->sock->sk, vs); |
553675fb | 2411 | |
dc01e7d3 OG |
2412 | /* Initialize the vxlan udp offloads structure */ |
2413 | vs->udp_offloads.port = port; | |
2414 | vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive; | |
2415 | vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete; | |
2416 | ||
9c2e24e1 PS |
2417 | spin_lock(&vn->sock_lock); |
2418 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2419 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2420 | spin_unlock(&vn->sock_lock); |
553675fb | 2421 | |
2422 | /* Mark socket as an encapsulation socket. */ | |
2423 | udp_sk(sk)->encap_type = 1; | |
2424 | udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; | |
e4c7ed41 CW |
2425 | #if IS_ENABLED(CONFIG_IPV6) |
2426 | if (ipv6) | |
2427 | ipv6_stub->udpv6_encap_enable(); | |
2428 | else | |
2429 | #endif | |
2430 | udp_encap_enable(); | |
2431 | ||
9c2e24e1 PS |
2432 | return vs; |
2433 | } | |
2434 | ||
012a5729 PS |
2435 | struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
2436 | vxlan_rcv_t *rcv, void *data, | |
359a0ea9 | 2437 | bool no_share, u32 flags) |
9c2e24e1 PS |
2438 | { |
2439 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2440 | struct vxlan_sock *vs; | |
2441 | ||
359a0ea9 | 2442 | vs = vxlan_socket_create(net, port, rcv, data, flags); |
9c2e24e1 PS |
2443 | if (!IS_ERR(vs)) |
2444 | return vs; | |
553675fb | 2445 | |
012a5729 PS |
2446 | if (no_share) /* Return error if sharing is not allowed. */ |
2447 | return vs; | |
2448 | ||
9c2e24e1 PS |
2449 | spin_lock(&vn->sock_lock); |
2450 | vs = vxlan_find_sock(net, port); | |
5cfccc5a PS |
2451 | if (vs) { |
2452 | if (vs->rcv == rcv) | |
2453 | atomic_inc(&vs->refcnt); | |
2454 | else | |
2455 | vs = ERR_PTR(-EBUSY); | |
2456 | } | |
2457 | spin_unlock(&vn->sock_lock); | |
2458 | ||
2459 | if (!vs) | |
9c2e24e1 PS |
2460 | vs = ERR_PTR(-EINVAL); |
2461 | ||
553675fb | 2462 | return vs; |
2463 | } | |
012a5729 | 2464 | EXPORT_SYMBOL_GPL(vxlan_sock_add); |
553675fb | 2465 | |
1c51a915 SH |
2466 | /* Scheduled at device creation to bind to a socket */ |
2467 | static void vxlan_sock_work(struct work_struct *work) | |
2468 | { | |
9c2e24e1 | 2469 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, sock_work); |
f01ec1c0 | 2470 | struct net *net = vxlan->net; |
1c51a915 | 2471 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
9c2e24e1 PS |
2472 | __be16 port = vxlan->dst_port; |
2473 | struct vxlan_sock *nvs; | |
1c51a915 | 2474 | |
359a0ea9 | 2475 | nvs = vxlan_sock_add(net, port, vxlan_rcv, NULL, false, vxlan->flags); |
1c51a915 | 2476 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2477 | if (!IS_ERR(nvs)) |
2478 | vxlan_vs_add_dev(nvs, vxlan); | |
2479 | spin_unlock(&vn->sock_lock); | |
2480 | ||
2481 | dev_put(vxlan->dev); | |
1c51a915 SH |
2482 | } |
2483 | ||
d342894c | 2484 | static int vxlan_newlink(struct net *net, struct net_device *dev, |
2485 | struct nlattr *tb[], struct nlattr *data[]) | |
2486 | { | |
553675fb | 2487 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
d342894c | 2488 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 2489 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 2490 | __u32 vni; |
2491 | int err; | |
e4c7ed41 | 2492 | bool use_ipv6 = false; |
d342894c | 2493 | |
2494 | if (!data[IFLA_VXLAN_ID]) | |
2495 | return -EINVAL; | |
2496 | ||
f01ec1c0 ND |
2497 | vxlan->net = dev_net(dev); |
2498 | ||
d342894c | 2499 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); |
c7995c43 | 2500 | dst->remote_vni = vni; |
d342894c | 2501 | |
5933a7bb MR |
2502 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2503 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 CW |
2504 | if (data[IFLA_VXLAN_GROUP]) { |
2505 | dst->remote_ip.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
e4c7ed41 CW |
2506 | } else if (data[IFLA_VXLAN_GROUP6]) { |
2507 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2508 | return -EPFNOSUPPORT; | |
2509 | ||
2510 | nla_memcpy(&dst->remote_ip.sin6.sin6_addr, data[IFLA_VXLAN_GROUP6], | |
2511 | sizeof(struct in6_addr)); | |
2512 | dst->remote_ip.sa.sa_family = AF_INET6; | |
2513 | use_ipv6 = true; | |
2514 | } | |
d342894c | 2515 | |
e4c7ed41 CW |
2516 | if (data[IFLA_VXLAN_LOCAL]) { |
2517 | vxlan->saddr.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
2518 | vxlan->saddr.sa.sa_family = AF_INET; | |
2519 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2520 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2521 | return -EPFNOSUPPORT; | |
2522 | ||
2523 | /* TODO: respect scope id */ | |
2524 | nla_memcpy(&vxlan->saddr.sin6.sin6_addr, data[IFLA_VXLAN_LOCAL6], | |
2525 | sizeof(struct in6_addr)); | |
2526 | vxlan->saddr.sa.sa_family = AF_INET6; | |
2527 | use_ipv6 = true; | |
2528 | } | |
d342894c | 2529 | |
34e02aa1 | 2530 | if (data[IFLA_VXLAN_LINK] && |
c7995c43 | 2531 | (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { |
34e02aa1 | 2532 | struct net_device *lowerdev |
c7995c43 | 2533 | = __dev_get_by_index(net, dst->remote_ifindex); |
34e02aa1 | 2534 | |
2535 | if (!lowerdev) { | |
c7995c43 | 2536 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2537 | return -ENODEV; |
2538 | } | |
d342894c | 2539 | |
e4c7ed41 CW |
2540 | #if IS_ENABLED(CONFIG_IPV6) |
2541 | if (use_ipv6) { | |
2542 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2543 | if (idev && idev->cnf.disable_ipv6) { | |
2544 | pr_info("IPv6 is disabled via sysctl\n"); | |
2545 | return -EPERM; | |
2546 | } | |
2547 | vxlan->flags |= VXLAN_F_IPV6; | |
2548 | } | |
2549 | #endif | |
2550 | ||
34e02aa1 | 2551 | if (!tb[IFLA_MTU]) |
e4c7ed41 | 2552 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 | 2553 | |
2853af6a | 2554 | dev->needed_headroom = lowerdev->hard_header_len + |
e4c7ed41 | 2555 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
7bda701e | 2556 | } else if (use_ipv6) |
2557 | vxlan->flags |= VXLAN_F_IPV6; | |
d342894c | 2558 | |
2559 | if (data[IFLA_VXLAN_TOS]) | |
2560 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
2561 | ||
afb97186 VB |
2562 | if (data[IFLA_VXLAN_TTL]) |
2563 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
2564 | ||
d342894c | 2565 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 2566 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 2567 | |
2568 | if (data[IFLA_VXLAN_AGEING]) | |
2569 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
2570 | else | |
2571 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
2572 | ||
e4f67add DS |
2573 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
2574 | vxlan->flags |= VXLAN_F_PROXY; | |
2575 | ||
2576 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
2577 | vxlan->flags |= VXLAN_F_RSC; | |
2578 | ||
2579 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
2580 | vxlan->flags |= VXLAN_F_L2MISS; | |
2581 | ||
2582 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
2583 | vxlan->flags |= VXLAN_F_L3MISS; | |
2584 | ||
d342894c | 2585 | if (data[IFLA_VXLAN_LIMIT]) |
2586 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
2587 | ||
05f47d69 | 2588 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2589 | const struct ifla_vxlan_port_range *p | |
2590 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2591 | vxlan->port_min = ntohs(p->low); | |
2592 | vxlan->port_max = ntohs(p->high); | |
2593 | } | |
2594 | ||
823aa873 | 2595 | if (data[IFLA_VXLAN_PORT]) |
2596 | vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
2597 | ||
359a0ea9 TH |
2598 | if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) |
2599 | vxlan->flags |= VXLAN_F_UDP_CSUM; | |
2600 | ||
2601 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && | |
2602 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
2603 | vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; | |
2604 | ||
2605 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && | |
2606 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
2607 | vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; | |
2608 | ||
553675fb | 2609 | if (vxlan_find_vni(net, vni, vxlan->dst_port)) { |
2610 | pr_info("duplicate VNI %u\n", vni); | |
2611 | return -EEXIST; | |
2612 | } | |
2613 | ||
7ad24ea4 | 2614 | dev->ethtool_ops = &vxlan_ethtool_ops; |
1b13c97f | 2615 | |
2936b6ab SS |
2616 | /* create an fdb entry for a valid default destination */ |
2617 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2618 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2619 | &vxlan->default_dst.remote_ip, | |
2620 | NUD_REACHABLE|NUD_PERMANENT, | |
2621 | NLM_F_EXCL|NLM_F_CREATE, | |
2622 | vxlan->dst_port, | |
2623 | vxlan->default_dst.remote_vni, | |
2624 | vxlan->default_dst.remote_ifindex, | |
2625 | NTF_SELF); | |
2626 | if (err) | |
2627 | return err; | |
2628 | } | |
d342894c | 2629 | |
afbd8bae MR |
2630 | err = register_netdevice(dev); |
2631 | if (err) { | |
ba609e9b | 2632 | vxlan_fdb_delete_default(vxlan); |
afbd8bae MR |
2633 | return err; |
2634 | } | |
2635 | ||
553675fb | 2636 | list_add(&vxlan->next, &vn->vxlan_list); |
553675fb | 2637 | |
2638 | return 0; | |
d342894c | 2639 | } |
2640 | ||
2641 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2642 | { | |
2643 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2644 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 2645 | |
fe5c3561 | 2646 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2647 | if (!hlist_unhashed(&vxlan->hlist)) |
2648 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 2649 | spin_unlock(&vn->sock_lock); |
2650 | ||
553675fb | 2651 | list_del(&vxlan->next); |
d342894c | 2652 | unregister_netdevice_queue(dev, head); |
2653 | } | |
2654 | ||
2655 | static size_t vxlan_get_size(const struct net_device *dev) | |
2656 | { | |
2657 | ||
2658 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 2659 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 2660 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 2661 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 2662 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
2663 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
2664 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
2665 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
2666 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
2667 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
2668 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 2669 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
2670 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 2671 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
2672 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
2673 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
2674 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
2675 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
d342894c | 2676 | 0; |
2677 | } | |
2678 | ||
2679 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
2680 | { | |
2681 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 2682 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 2683 | struct ifla_vxlan_port_range ports = { |
2684 | .low = htons(vxlan->port_min), | |
2685 | .high = htons(vxlan->port_max), | |
2686 | }; | |
d342894c | 2687 | |
c7995c43 | 2688 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 2689 | goto nla_put_failure; |
2690 | ||
e4c7ed41 CW |
2691 | if (!vxlan_addr_any(&dst->remote_ip)) { |
2692 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
2693 | if (nla_put_be32(skb, IFLA_VXLAN_GROUP, | |
2694 | dst->remote_ip.sin.sin_addr.s_addr)) | |
2695 | goto nla_put_failure; | |
2696 | #if IS_ENABLED(CONFIG_IPV6) | |
2697 | } else { | |
2698 | if (nla_put(skb, IFLA_VXLAN_GROUP6, sizeof(struct in6_addr), | |
2699 | &dst->remote_ip.sin6.sin6_addr)) | |
2700 | goto nla_put_failure; | |
2701 | #endif | |
2702 | } | |
2703 | } | |
d342894c | 2704 | |
c7995c43 | 2705 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 2706 | goto nla_put_failure; |
2707 | ||
e4c7ed41 CW |
2708 | if (!vxlan_addr_any(&vxlan->saddr)) { |
2709 | if (vxlan->saddr.sa.sa_family == AF_INET) { | |
2710 | if (nla_put_be32(skb, IFLA_VXLAN_LOCAL, | |
2711 | vxlan->saddr.sin.sin_addr.s_addr)) | |
2712 | goto nla_put_failure; | |
2713 | #if IS_ENABLED(CONFIG_IPV6) | |
2714 | } else { | |
2715 | if (nla_put(skb, IFLA_VXLAN_LOCAL6, sizeof(struct in6_addr), | |
2716 | &vxlan->saddr.sin6.sin6_addr)) | |
2717 | goto nla_put_failure; | |
2718 | #endif | |
2719 | } | |
2720 | } | |
d342894c | 2721 | |
2722 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
2723 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
2724 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
2725 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
2726 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
2727 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
2728 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
2729 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
2730 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
2731 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
2732 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 2733 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
823aa873 | 2734 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || |
359a0ea9 TH |
2735 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port) || |
2736 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, | |
2737 | !!(vxlan->flags & VXLAN_F_UDP_CSUM)) || | |
2738 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, | |
2739 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
2740 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
2741 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX))) | |
d342894c | 2742 | goto nla_put_failure; |
2743 | ||
05f47d69 | 2744 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
2745 | goto nla_put_failure; | |
2746 | ||
d342894c | 2747 | return 0; |
2748 | ||
2749 | nla_put_failure: | |
2750 | return -EMSGSIZE; | |
2751 | } | |
2752 | ||
2753 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { | |
2754 | .kind = "vxlan", | |
2755 | .maxtype = IFLA_VXLAN_MAX, | |
2756 | .policy = vxlan_policy, | |
2757 | .priv_size = sizeof(struct vxlan_dev), | |
2758 | .setup = vxlan_setup, | |
2759 | .validate = vxlan_validate, | |
2760 | .newlink = vxlan_newlink, | |
2761 | .dellink = vxlan_dellink, | |
2762 | .get_size = vxlan_get_size, | |
2763 | .fill_info = vxlan_fill_info, | |
2764 | }; | |
2765 | ||
acaf4e70 DB |
2766 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
2767 | struct net_device *dev) | |
2768 | { | |
2769 | struct vxlan_dev *vxlan, *next; | |
2770 | LIST_HEAD(list_kill); | |
2771 | ||
2772 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
2773 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2774 | ||
2775 | /* In case we created vxlan device with carrier | |
2776 | * and we loose the carrier due to module unload | |
2777 | * we also need to remove vxlan device. In other | |
2778 | * cases, it's not necessary and remote_ifindex | |
2779 | * is 0 here, so no matches. | |
2780 | */ | |
2781 | if (dst->remote_ifindex == dev->ifindex) | |
2782 | vxlan_dellink(vxlan->dev, &list_kill); | |
2783 | } | |
2784 | ||
2785 | unregister_netdevice_many(&list_kill); | |
2786 | } | |
2787 | ||
2788 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
2789 | unsigned long event, void *ptr) | |
2790 | { | |
2791 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 2792 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 2793 | |
783c1463 | 2794 | if (event == NETDEV_UNREGISTER) |
acaf4e70 DB |
2795 | vxlan_handle_lowerdev_unregister(vn, dev); |
2796 | ||
2797 | return NOTIFY_DONE; | |
2798 | } | |
2799 | ||
2800 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
2801 | .notifier_call = vxlan_lowerdev_event, | |
2802 | }; | |
2803 | ||
d342894c | 2804 | static __net_init int vxlan_init_net(struct net *net) |
2805 | { | |
2806 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 2807 | unsigned int h; |
d342894c | 2808 | |
553675fb | 2809 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 2810 | spin_lock_init(&vn->sock_lock); |
d342894c | 2811 | |
553675fb | 2812 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
2813 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 2814 | |
2815 | return 0; | |
2816 | } | |
2817 | ||
f01ec1c0 ND |
2818 | static void __net_exit vxlan_exit_net(struct net *net) |
2819 | { | |
2820 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2821 | struct vxlan_dev *vxlan, *next; | |
2822 | struct net_device *dev, *aux; | |
2823 | LIST_HEAD(list); | |
2824 | ||
2825 | rtnl_lock(); | |
2826 | for_each_netdev_safe(net, dev, aux) | |
2827 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
2828 | unregister_netdevice_queue(dev, &list); | |
2829 | ||
2830 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
2831 | /* If vxlan->dev is in the same netns, it has already been added | |
2832 | * to the list by the previous loop. | |
2833 | */ | |
2834 | if (!net_eq(dev_net(vxlan->dev), net)) | |
2835 | unregister_netdevice_queue(dev, &list); | |
2836 | } | |
2837 | ||
2838 | unregister_netdevice_many(&list); | |
2839 | rtnl_unlock(); | |
2840 | } | |
2841 | ||
d342894c | 2842 | static struct pernet_operations vxlan_net_ops = { |
2843 | .init = vxlan_init_net, | |
f01ec1c0 | 2844 | .exit = vxlan_exit_net, |
d342894c | 2845 | .id = &vxlan_net_id, |
2846 | .size = sizeof(struct vxlan_net), | |
2847 | }; | |
2848 | ||
2849 | static int __init vxlan_init_module(void) | |
2850 | { | |
2851 | int rc; | |
2852 | ||
758c57d1 SH |
2853 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
2854 | if (!vxlan_wq) | |
2855 | return -ENOMEM; | |
2856 | ||
d342894c | 2857 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
2858 | ||
783c1463 | 2859 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 2860 | if (rc) |
2861 | goto out1; | |
2862 | ||
acaf4e70 | 2863 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 2864 | if (rc) |
2865 | goto out2; | |
2866 | ||
acaf4e70 DB |
2867 | rc = rtnl_link_register(&vxlan_link_ops); |
2868 | if (rc) | |
2869 | goto out3; | |
d342894c | 2870 | |
acaf4e70 DB |
2871 | return 0; |
2872 | out3: | |
2873 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 2874 | out2: |
783c1463 | 2875 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 2876 | out1: |
758c57d1 | 2877 | destroy_workqueue(vxlan_wq); |
d342894c | 2878 | return rc; |
2879 | } | |
7332a13b | 2880 | late_initcall(vxlan_init_module); |
d342894c | 2881 | |
2882 | static void __exit vxlan_cleanup_module(void) | |
2883 | { | |
b7153984 | 2884 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 2885 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 2886 | destroy_workqueue(vxlan_wq); |
783c1463 DB |
2887 | unregister_pernet_subsys(&vxlan_net_ops); |
2888 | /* rcu_barrier() is called by netns */ | |
d342894c | 2889 | } |
2890 | module_exit(vxlan_cleanup_module); | |
2891 | ||
2892 | MODULE_LICENSE("GPL"); | |
2893 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 2894 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 2895 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 2896 | MODULE_ALIAS_RTNL_LINK("vxlan"); |