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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> |
acbf74a7 | 45 | #include <net/udp_tunnel.h> |
e4c7ed41 CW |
46 | #if IS_ENABLED(CONFIG_IPV6) |
47 | #include <net/ipv6.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/ip6_tunnel.h> | |
660d98ca | 50 | #include <net/ip6_checksum.h> |
e4c7ed41 | 51 | #endif |
ee122c79 | 52 | #include <net/dst_metadata.h> |
d342894c | 53 | |
54 | #define VXLAN_VERSION "0.1" | |
55 | ||
553675fb | 56 | #define PORT_HASH_BITS 8 |
57 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 58 | #define FDB_AGE_DEFAULT 300 /* 5 min */ |
59 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
60 | ||
23c578bf | 61 | /* UDP port for VXLAN traffic. |
62 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 63 | * for compatibility with early adopters. |
23c578bf | 64 | */ |
9daaa397 SH |
65 | static unsigned short vxlan_port __read_mostly = 8472; |
66 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 67 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
68 | ||
69 | static bool log_ecn_error = true; | |
70 | module_param(log_ecn_error, bool, 0644); | |
71 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
72 | ||
60d9d4c6 | 73 | static int vxlan_net_id; |
0dfbdf41 | 74 | static struct rtnl_link_ops vxlan_link_ops; |
553675fb | 75 | |
afbd8bae MR |
76 | static const u8 all_zeros_mac[ETH_ALEN]; |
77 | ||
205f356d | 78 | static int vxlan_sock_add(struct vxlan_dev *vxlan); |
614732ea | 79 | |
553675fb | 80 | /* per-network namespace private data for this module */ |
81 | struct vxlan_net { | |
82 | struct list_head vxlan_list; | |
83 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 84 | spinlock_t sock_lock; |
553675fb | 85 | }; |
86 | ||
d342894c | 87 | /* Forwarding table entry */ |
88 | struct vxlan_fdb { | |
89 | struct hlist_node hlist; /* linked list of entries */ | |
90 | struct rcu_head rcu; | |
91 | unsigned long updated; /* jiffies */ | |
92 | unsigned long used; | |
3e61aa8f | 93 | struct list_head remotes; |
7177a3b0 | 94 | u8 eth_addr[ETH_ALEN]; |
d342894c | 95 | u16 state; /* see ndm_state */ |
ae884082 | 96 | u8 flags; /* see ndm_flags */ |
d342894c | 97 | }; |
98 | ||
d342894c | 99 | /* salt for hash table */ |
100 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 101 | static struct workqueue_struct *vxlan_wq; |
d342894c | 102 | |
ee122c79 TG |
103 | static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
104 | { | |
e7030878 TG |
105 | return vs->flags & VXLAN_F_COLLECT_METADATA || |
106 | ip_tunnel_collect_metadata(); | |
ee122c79 TG |
107 | } |
108 | ||
e4c7ed41 CW |
109 | #if IS_ENABLED(CONFIG_IPV6) |
110 | static inline | |
111 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
112 | { | |
f0ef3126 JB |
113 | if (a->sa.sa_family != b->sa.sa_family) |
114 | return false; | |
115 | if (a->sa.sa_family == AF_INET6) | |
116 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
117 | else | |
118 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
e4c7ed41 CW |
119 | } |
120 | ||
121 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
122 | { | |
f0ef3126 JB |
123 | if (ipa->sa.sa_family == AF_INET6) |
124 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
125 | else | |
126 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
e4c7ed41 CW |
127 | } |
128 | ||
129 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
130 | { | |
f0ef3126 JB |
131 | if (ipa->sa.sa_family == AF_INET6) |
132 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
133 | else | |
134 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
e4c7ed41 CW |
135 | } |
136 | ||
137 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
138 | { | |
f0ef3126 | 139 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
67b61f6c | 140 | ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
f0ef3126 JB |
141 | ip->sa.sa_family = AF_INET6; |
142 | return 0; | |
143 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 144 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
145 | ip->sa.sa_family = AF_INET; |
146 | return 0; | |
147 | } else { | |
148 | return -EAFNOSUPPORT; | |
149 | } | |
e4c7ed41 CW |
150 | } |
151 | ||
152 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 153 | const union vxlan_addr *ip) |
e4c7ed41 | 154 | { |
f0ef3126 | 155 | if (ip->sa.sa_family == AF_INET6) |
930345ea | 156 | return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
f0ef3126 | 157 | else |
930345ea | 158 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
159 | } |
160 | ||
161 | #else /* !CONFIG_IPV6 */ | |
162 | ||
163 | static inline | |
164 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
165 | { | |
f0ef3126 | 166 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
e4c7ed41 CW |
167 | } |
168 | ||
169 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
170 | { | |
f0ef3126 | 171 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); |
e4c7ed41 CW |
172 | } |
173 | ||
174 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
175 | { | |
f0ef3126 | 176 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); |
e4c7ed41 CW |
177 | } |
178 | ||
179 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
180 | { | |
f0ef3126 JB |
181 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
182 | return -EAFNOSUPPORT; | |
183 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 184 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
185 | ip->sa.sa_family = AF_INET; |
186 | return 0; | |
187 | } else { | |
188 | return -EAFNOSUPPORT; | |
189 | } | |
e4c7ed41 CW |
190 | } |
191 | ||
192 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 193 | const union vxlan_addr *ip) |
e4c7ed41 | 194 | { |
930345ea | 195 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
196 | } |
197 | #endif | |
198 | ||
553675fb | 199 | /* Virtual Network hash table head */ |
200 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
201 | { | |
202 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
203 | } | |
204 | ||
205 | /* Socket hash table head */ | |
206 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 207 | { |
208 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
209 | ||
553675fb | 210 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
211 | } | |
212 | ||
3e61aa8f SH |
213 | /* First remote destination for a forwarding entry. |
214 | * Guaranteed to be non-NULL because remotes are never deleted. | |
215 | */ | |
5ca5461c | 216 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 217 | { |
5ca5461c | 218 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
219 | } | |
220 | ||
221 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
222 | { | |
223 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
224 | } |
225 | ||
ac5132d1 TG |
226 | /* Find VXLAN socket based on network namespace, address family and UDP port |
227 | * and enabled unshareable flags. | |
228 | */ | |
229 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
230 | __be16 port, u32 flags) | |
553675fb | 231 | { |
232 | struct vxlan_sock *vs; | |
af33c1ad TH |
233 | |
234 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 235 | |
236 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 237 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
705cc62f | 238 | vxlan_get_sk_family(vs) == family && |
af33c1ad | 239 | vs->flags == flags) |
553675fb | 240 | return vs; |
241 | } | |
242 | return NULL; | |
d342894c | 243 | } |
244 | ||
5cfccc5a | 245 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id) |
d342894c | 246 | { |
247 | struct vxlan_dev *vxlan; | |
d342894c | 248 | |
553675fb | 249 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { |
c7995c43 | 250 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 251 | return vxlan; |
252 | } | |
253 | ||
254 | return NULL; | |
255 | } | |
256 | ||
5cfccc5a | 257 | /* Look up VNI in a per net namespace table */ |
19ca9fc1 | 258 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, |
ac5132d1 TG |
259 | sa_family_t family, __be16 port, |
260 | u32 flags) | |
5cfccc5a PS |
261 | { |
262 | struct vxlan_sock *vs; | |
263 | ||
ac5132d1 | 264 | vs = vxlan_find_sock(net, family, port, flags); |
5cfccc5a PS |
265 | if (!vs) |
266 | return NULL; | |
267 | ||
268 | return vxlan_vs_find_vni(vs, id); | |
269 | } | |
270 | ||
d342894c | 271 | /* Fill in neighbour message in skbuff. */ |
272 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
273 | const struct vxlan_fdb *fdb, |
274 | u32 portid, u32 seq, int type, unsigned int flags, | |
275 | const struct vxlan_rdst *rdst) | |
d342894c | 276 | { |
277 | unsigned long now = jiffies; | |
278 | struct nda_cacheinfo ci; | |
279 | struct nlmsghdr *nlh; | |
280 | struct ndmsg *ndm; | |
e4f67add | 281 | bool send_ip, send_eth; |
d342894c | 282 | |
283 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
284 | if (nlh == NULL) | |
285 | return -EMSGSIZE; | |
286 | ||
287 | ndm = nlmsg_data(nlh); | |
288 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
289 | |
290 | send_eth = send_ip = true; | |
291 | ||
292 | if (type == RTM_GETNEIGH) { | |
293 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 294 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
295 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
296 | } else | |
297 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 298 | ndm->ndm_state = fdb->state; |
299 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 300 | ndm->ndm_flags = fdb->flags; |
545469f7 | 301 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 302 | |
193523bf | 303 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 304 | nla_put_s32(skb, NDA_LINK_NETNSID, |
7a0877d4 | 305 | peernet2id_alloc(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
306 | goto nla_put_failure; |
307 | ||
e4f67add | 308 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 309 | goto nla_put_failure; |
310 | ||
e4c7ed41 | 311 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
312 | goto nla_put_failure; |
313 | ||
0dfbdf41 | 314 | if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && |
6681712d DS |
315 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
316 | goto nla_put_failure; | |
c7995c43 | 317 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 318 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
319 | goto nla_put_failure; |
320 | if (rdst->remote_ifindex && | |
321 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 322 | goto nla_put_failure; |
323 | ||
324 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
325 | ci.ndm_confirmed = 0; | |
326 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
327 | ci.ndm_refcnt = 0; | |
328 | ||
329 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
330 | goto nla_put_failure; | |
331 | ||
053c095a JB |
332 | nlmsg_end(skb, nlh); |
333 | return 0; | |
d342894c | 334 | |
335 | nla_put_failure: | |
336 | nlmsg_cancel(skb, nlh); | |
337 | return -EMSGSIZE; | |
338 | } | |
339 | ||
340 | static inline size_t vxlan_nlmsg_size(void) | |
341 | { | |
342 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
343 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 344 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 345 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
346 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
347 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 348 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 349 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
350 | } | |
351 | ||
9e4b93f9 ND |
352 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
353 | struct vxlan_rdst *rd, int type) | |
d342894c | 354 | { |
355 | struct net *net = dev_net(vxlan->dev); | |
356 | struct sk_buff *skb; | |
357 | int err = -ENOBUFS; | |
358 | ||
359 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
360 | if (skb == NULL) | |
361 | goto errout; | |
362 | ||
9e4b93f9 | 363 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 364 | if (err < 0) { |
365 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
366 | WARN_ON(err == -EMSGSIZE); | |
367 | kfree_skb(skb); | |
368 | goto errout; | |
369 | } | |
370 | ||
371 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
372 | return; | |
373 | errout: | |
374 | if (err < 0) | |
375 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
376 | } | |
377 | ||
e4c7ed41 | 378 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
379 | { |
380 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
381 | struct vxlan_fdb f = { |
382 | .state = NUD_STALE, | |
383 | }; | |
384 | struct vxlan_rdst remote = { | |
e4c7ed41 | 385 | .remote_ip = *ipa, /* goes to NDA_DST */ |
bb3fd687 SH |
386 | .remote_vni = VXLAN_N_VID, |
387 | }; | |
3e61aa8f | 388 | |
9e4b93f9 | 389 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
390 | } |
391 | ||
392 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
393 | { | |
bb3fd687 SH |
394 | struct vxlan_fdb f = { |
395 | .state = NUD_STALE, | |
396 | }; | |
9e4b93f9 | 397 | struct vxlan_rdst remote = { }; |
e4f67add | 398 | |
e4f67add DS |
399 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
400 | ||
9e4b93f9 | 401 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
402 | } |
403 | ||
d342894c | 404 | /* Hash Ethernet address */ |
405 | static u32 eth_hash(const unsigned char *addr) | |
406 | { | |
407 | u64 value = get_unaligned((u64 *)addr); | |
408 | ||
409 | /* only want 6 bytes */ | |
410 | #ifdef __BIG_ENDIAN | |
d342894c | 411 | value >>= 16; |
321fb991 | 412 | #else |
413 | value <<= 16; | |
d342894c | 414 | #endif |
415 | return hash_64(value, FDB_HASH_BITS); | |
416 | } | |
417 | ||
418 | /* Hash chain to use given mac address */ | |
419 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
420 | const u8 *mac) | |
421 | { | |
422 | return &vxlan->fdb_head[eth_hash(mac)]; | |
423 | } | |
424 | ||
425 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 426 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 427 | const u8 *mac) |
d342894c | 428 | { |
429 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
430 | struct vxlan_fdb *f; | |
d342894c | 431 | |
b67bfe0d | 432 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 433 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 434 | return f; |
435 | } | |
436 | ||
437 | return NULL; | |
438 | } | |
439 | ||
014be2c8 SS |
440 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
441 | const u8 *mac) | |
442 | { | |
443 | struct vxlan_fdb *f; | |
444 | ||
445 | f = __vxlan_find_mac(vxlan, mac); | |
446 | if (f) | |
447 | f->used = jiffies; | |
448 | ||
449 | return f; | |
450 | } | |
451 | ||
a5e7c10a MR |
452 | /* caller should hold vxlan->hash_lock */ |
453 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 454 | union vxlan_addr *ip, __be16 port, |
a5e7c10a | 455 | __u32 vni, __u32 ifindex) |
6681712d | 456 | { |
3e61aa8f | 457 | struct vxlan_rdst *rd; |
6681712d | 458 | |
3e61aa8f | 459 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 460 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
461 | rd->remote_port == port && |
462 | rd->remote_vni == vni && | |
463 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 464 | return rd; |
6681712d | 465 | } |
3e61aa8f | 466 | |
a5e7c10a MR |
467 | return NULL; |
468 | } | |
469 | ||
906dc186 TR |
470 | /* Replace destination of unicast mac */ |
471 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
e4c7ed41 | 472 | union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex) |
906dc186 TR |
473 | { |
474 | struct vxlan_rdst *rd; | |
475 | ||
476 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
477 | if (rd) | |
478 | return 0; | |
479 | ||
480 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
481 | if (!rd) | |
482 | return 0; | |
e4c7ed41 | 483 | rd->remote_ip = *ip; |
906dc186 TR |
484 | rd->remote_port = port; |
485 | rd->remote_vni = vni; | |
486 | rd->remote_ifindex = ifindex; | |
487 | return 1; | |
488 | } | |
489 | ||
a5e7c10a MR |
490 | /* Add/update destinations for multicast */ |
491 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
9e4b93f9 ND |
492 | union vxlan_addr *ip, __be16 port, __u32 vni, |
493 | __u32 ifindex, struct vxlan_rdst **rdp) | |
a5e7c10a MR |
494 | { |
495 | struct vxlan_rdst *rd; | |
496 | ||
497 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
498 | if (rd) | |
499 | return 0; | |
500 | ||
6681712d DS |
501 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
502 | if (rd == NULL) | |
503 | return -ENOBUFS; | |
e4c7ed41 | 504 | rd->remote_ip = *ip; |
6681712d DS |
505 | rd->remote_port = port; |
506 | rd->remote_vni = vni; | |
507 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
508 | |
509 | list_add_tail_rcu(&rd->list, &f->remotes); | |
510 | ||
9e4b93f9 | 511 | *rdp = rd; |
6681712d DS |
512 | return 1; |
513 | } | |
514 | ||
dfd8645e TH |
515 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
516 | unsigned int off, | |
517 | struct vxlanhdr *vh, size_t hdrlen, | |
0ace2ca8 TH |
518 | u32 data, struct gro_remcsum *grc, |
519 | bool nopartial) | |
dfd8645e | 520 | { |
b7fe10e5 | 521 | size_t start, offset; |
dfd8645e TH |
522 | |
523 | if (skb->remcsum_offload) | |
b7fe10e5 | 524 | return vh; |
dfd8645e TH |
525 | |
526 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
527 | return NULL; | |
528 | ||
529 | start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; | |
530 | offset = start + ((data & VXLAN_RCO_UDP) ? | |
531 | offsetof(struct udphdr, check) : | |
532 | offsetof(struct tcphdr, check)); | |
533 | ||
b7fe10e5 TH |
534 | vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
535 | start, offset, grc, nopartial); | |
dfd8645e TH |
536 | |
537 | skb->remcsum_offload = 1; | |
538 | ||
539 | return vh; | |
540 | } | |
541 | ||
a2b12f3c TH |
542 | static struct sk_buff **vxlan_gro_receive(struct sk_buff **head, |
543 | struct sk_buff *skb, | |
544 | struct udp_offload *uoff) | |
dc01e7d3 OG |
545 | { |
546 | struct sk_buff *p, **pp = NULL; | |
547 | struct vxlanhdr *vh, *vh2; | |
9b174d88 | 548 | unsigned int hlen, off_vx; |
dc01e7d3 | 549 | int flush = 1; |
dfd8645e TH |
550 | struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock, |
551 | udp_offloads); | |
552 | u32 flags; | |
26c4f7da TH |
553 | struct gro_remcsum grc; |
554 | ||
555 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
556 | |
557 | off_vx = skb_gro_offset(skb); | |
558 | hlen = off_vx + sizeof(*vh); | |
559 | vh = skb_gro_header_fast(skb, off_vx); | |
560 | if (skb_gro_header_hard(skb, hlen)) { | |
561 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
562 | if (unlikely(!vh)) | |
563 | goto out; | |
564 | } | |
dc01e7d3 | 565 | |
dfd8645e TH |
566 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
567 | ||
568 | flags = ntohl(vh->vx_flags); | |
569 | ||
570 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
571 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
0ace2ca8 TH |
572 | ntohl(vh->vx_vni), &grc, |
573 | !!(vs->flags & | |
574 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
575 | |
576 | if (!vh) | |
577 | goto out; | |
578 | } | |
579 | ||
b7fe10e5 TH |
580 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
581 | ||
dc01e7d3 OG |
582 | flush = 0; |
583 | ||
584 | for (p = *head; p; p = p->next) { | |
585 | if (!NAPI_GRO_CB(p)->same_flow) | |
586 | continue; | |
587 | ||
588 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
589 | if (vh->vx_flags != vh2->vx_flags || |
590 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
591 | NAPI_GRO_CB(p)->same_flow = 0; |
592 | continue; | |
593 | } | |
dc01e7d3 OG |
594 | } |
595 | ||
9b174d88 | 596 | pp = eth_gro_receive(head, skb); |
dc01e7d3 | 597 | |
dc01e7d3 | 598 | out: |
26c4f7da | 599 | skb_gro_remcsum_cleanup(skb, &grc); |
dc01e7d3 OG |
600 | NAPI_GRO_CB(skb)->flush |= flush; |
601 | ||
602 | return pp; | |
603 | } | |
604 | ||
a2b12f3c TH |
605 | static int vxlan_gro_complete(struct sk_buff *skb, int nhoff, |
606 | struct udp_offload *uoff) | |
dc01e7d3 | 607 | { |
cfdf1e1b JG |
608 | udp_tunnel_gro_complete(skb, nhoff); |
609 | ||
9b174d88 | 610 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
611 | } |
612 | ||
53cf5275 | 613 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 614 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
615 | { |
616 | struct net_device *dev; | |
dc01e7d3 | 617 | struct sock *sk = vs->sock->sk; |
53cf5275 | 618 | struct net *net = sock_net(sk); |
705cc62f | 619 | sa_family_t sa_family = vxlan_get_sk_family(vs); |
35e42379 | 620 | __be16 port = inet_sk(sk)->inet_sport; |
dc01e7d3 OG |
621 | int err; |
622 | ||
623 | if (sa_family == AF_INET) { | |
624 | err = udp_add_offload(&vs->udp_offloads); | |
625 | if (err) | |
626 | pr_warn("vxlan: udp_add_offload failed with status %d\n", err); | |
627 | } | |
53cf5275 JG |
628 | |
629 | rcu_read_lock(); | |
630 | for_each_netdev_rcu(net, dev) { | |
631 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
632 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
633 | port); | |
634 | } | |
635 | rcu_read_unlock(); | |
636 | } | |
637 | ||
638 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 639 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
640 | { |
641 | struct net_device *dev; | |
dc01e7d3 | 642 | struct sock *sk = vs->sock->sk; |
53cf5275 | 643 | struct net *net = sock_net(sk); |
705cc62f | 644 | sa_family_t sa_family = vxlan_get_sk_family(vs); |
35e42379 | 645 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
646 | |
647 | rcu_read_lock(); | |
648 | for_each_netdev_rcu(net, dev) { | |
649 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
650 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
651 | port); | |
652 | } | |
653 | rcu_read_unlock(); | |
dc01e7d3 OG |
654 | |
655 | if (sa_family == AF_INET) | |
656 | udp_del_offload(&vs->udp_offloads); | |
53cf5275 JG |
657 | } |
658 | ||
d342894c | 659 | /* Add new entry to forwarding table -- assumes lock held */ |
660 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 661 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 662 | __u16 state, __u16 flags, |
73cf3317 | 663 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 664 | __u8 ndm_flags) |
d342894c | 665 | { |
9e4b93f9 | 666 | struct vxlan_rdst *rd = NULL; |
d342894c | 667 | struct vxlan_fdb *f; |
668 | int notify = 0; | |
669 | ||
014be2c8 | 670 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 671 | if (f) { |
672 | if (flags & NLM_F_EXCL) { | |
673 | netdev_dbg(vxlan->dev, | |
674 | "lost race to create %pM\n", mac); | |
675 | return -EEXIST; | |
676 | } | |
677 | if (f->state != state) { | |
678 | f->state = state; | |
679 | f->updated = jiffies; | |
680 | notify = 1; | |
681 | } | |
ae884082 DS |
682 | if (f->flags != ndm_flags) { |
683 | f->flags = ndm_flags; | |
684 | f->updated = jiffies; | |
685 | notify = 1; | |
686 | } | |
906dc186 TR |
687 | if ((flags & NLM_F_REPLACE)) { |
688 | /* Only change unicasts */ | |
689 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
690 | is_zero_ether_addr(f->eth_addr))) { | |
60840429 | 691 | notify |= vxlan_fdb_replace(f, ip, port, vni, |
906dc186 | 692 | ifindex); |
906dc186 TR |
693 | } else |
694 | return -EOPNOTSUPP; | |
695 | } | |
6681712d | 696 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
697 | (is_multicast_ether_addr(f->eth_addr) || |
698 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
699 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
700 | &rd); | |
6681712d DS |
701 | |
702 | if (rc < 0) | |
703 | return rc; | |
704 | notify |= rc; | |
705 | } | |
d342894c | 706 | } else { |
707 | if (!(flags & NLM_F_CREATE)) | |
708 | return -ENOENT; | |
709 | ||
0dfbdf41 TG |
710 | if (vxlan->cfg.addrmax && |
711 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
d342894c | 712 | return -ENOSPC; |
713 | ||
906dc186 TR |
714 | /* Disallow replace to add a multicast entry */ |
715 | if ((flags & NLM_F_REPLACE) && | |
716 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
717 | return -EOPNOTSUPP; | |
718 | ||
e4c7ed41 | 719 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 720 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
721 | if (!f) | |
722 | return -ENOMEM; | |
723 | ||
724 | notify = 1; | |
d342894c | 725 | f->state = state; |
ae884082 | 726 | f->flags = ndm_flags; |
d342894c | 727 | f->updated = f->used = jiffies; |
3e61aa8f | 728 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 729 | memcpy(f->eth_addr, mac, ETH_ALEN); |
730 | ||
9e4b93f9 | 731 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 732 | |
d342894c | 733 | ++vxlan->addrcnt; |
734 | hlist_add_head_rcu(&f->hlist, | |
735 | vxlan_fdb_head(vxlan, mac)); | |
736 | } | |
737 | ||
9e4b93f9 ND |
738 | if (notify) { |
739 | if (rd == NULL) | |
740 | rd = first_remote_rtnl(f); | |
741 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
742 | } | |
d342894c | 743 | |
744 | return 0; | |
745 | } | |
746 | ||
6706c82e | 747 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
748 | { |
749 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 750 | struct vxlan_rdst *rd, *nd; |
6681712d | 751 | |
3e61aa8f | 752 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 753 | kfree(rd); |
6681712d DS |
754 | kfree(f); |
755 | } | |
756 | ||
d342894c | 757 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
758 | { | |
759 | netdev_dbg(vxlan->dev, | |
760 | "delete %pM\n", f->eth_addr); | |
761 | ||
762 | --vxlan->addrcnt; | |
9e4b93f9 | 763 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 764 | |
765 | hlist_del_rcu(&f->hlist); | |
6681712d | 766 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 767 | } |
768 | ||
f0b074be | 769 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
e4c7ed41 | 770 | union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex) |
d342894c | 771 | { |
6681712d | 772 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 773 | int err; |
d342894c | 774 | |
f0b074be | 775 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
776 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
777 | if (err) | |
778 | return err; | |
f0b074be | 779 | } else { |
e4c7ed41 CW |
780 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
781 | if (remote->sa.sa_family == AF_INET) { | |
782 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
783 | ip->sa.sa_family = AF_INET; | |
784 | #if IS_ENABLED(CONFIG_IPV6) | |
785 | } else { | |
786 | ip->sin6.sin6_addr = in6addr_any; | |
787 | ip->sa.sa_family = AF_INET6; | |
788 | #endif | |
789 | } | |
f0b074be | 790 | } |
d342894c | 791 | |
6681712d | 792 | if (tb[NDA_PORT]) { |
73cf3317 | 793 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 794 | return -EINVAL; |
f0b074be MR |
795 | *port = nla_get_be16(tb[NDA_PORT]); |
796 | } else { | |
0dfbdf41 | 797 | *port = vxlan->cfg.dst_port; |
f0b074be | 798 | } |
6681712d DS |
799 | |
800 | if (tb[NDA_VNI]) { | |
801 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
802 | return -EINVAL; | |
f0b074be MR |
803 | *vni = nla_get_u32(tb[NDA_VNI]); |
804 | } else { | |
805 | *vni = vxlan->default_dst.remote_vni; | |
806 | } | |
6681712d DS |
807 | |
808 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 809 | struct net_device *tdev; |
6681712d DS |
810 | |
811 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
812 | return -EINVAL; | |
f0b074be | 813 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 814 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 815 | if (!tdev) |
6681712d | 816 | return -EADDRNOTAVAIL; |
f0b074be MR |
817 | } else { |
818 | *ifindex = 0; | |
819 | } | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | /* Add static entry (via netlink) */ | |
825 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
826 | struct net_device *dev, | |
f6f6424b | 827 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
828 | { |
829 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
830 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 831 | union vxlan_addr ip; |
f0b074be MR |
832 | __be16 port; |
833 | u32 vni, ifindex; | |
834 | int err; | |
835 | ||
836 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
837 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
838 | ndm->ndm_state); | |
839 | return -EINVAL; | |
840 | } | |
841 | ||
842 | if (tb[NDA_DST] == NULL) | |
843 | return -EINVAL; | |
844 | ||
845 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
846 | if (err) | |
847 | return err; | |
6681712d | 848 | |
5933a7bb MR |
849 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
850 | return -EAFNOSUPPORT; | |
851 | ||
d342894c | 852 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 853 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 854 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 855 | spin_unlock_bh(&vxlan->hash_lock); |
856 | ||
857 | return err; | |
858 | } | |
859 | ||
860 | /* Delete entry (via netlink) */ | |
1690be63 VY |
861 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
862 | struct net_device *dev, | |
f6f6424b | 863 | const unsigned char *addr, u16 vid) |
d342894c | 864 | { |
865 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
866 | struct vxlan_fdb *f; | |
bc7892ba | 867 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 868 | union vxlan_addr ip; |
bc7892ba MR |
869 | __be16 port; |
870 | u32 vni, ifindex; | |
871 | int err; | |
872 | ||
873 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
874 | if (err) | |
875 | return err; | |
876 | ||
877 | err = -ENOENT; | |
d342894c | 878 | |
879 | spin_lock_bh(&vxlan->hash_lock); | |
880 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
881 | if (!f) |
882 | goto out; | |
883 | ||
e4c7ed41 CW |
884 | if (!vxlan_addr_any(&ip)) { |
885 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
886 | if (!rd) |
887 | goto out; | |
888 | } | |
889 | ||
890 | err = 0; | |
891 | ||
892 | /* remove a destination if it's not the only one on the list, | |
893 | * otherwise destroy the fdb entry | |
894 | */ | |
895 | if (rd && !list_is_singular(&f->remotes)) { | |
896 | list_del_rcu(&rd->list); | |
9e4b93f9 | 897 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 898 | kfree_rcu(rd, rcu); |
bc7892ba | 899 | goto out; |
d342894c | 900 | } |
bc7892ba MR |
901 | |
902 | vxlan_fdb_destroy(vxlan, f); | |
903 | ||
904 | out: | |
d342894c | 905 | spin_unlock_bh(&vxlan->hash_lock); |
906 | ||
907 | return err; | |
908 | } | |
909 | ||
910 | /* Dump forwarding table */ | |
911 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 JHS |
912 | struct net_device *dev, |
913 | struct net_device *filter_dev, int idx) | |
d342894c | 914 | { |
915 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
916 | unsigned int h; | |
917 | ||
918 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
919 | struct vxlan_fdb *f; | |
d342894c | 920 | int err; |
921 | ||
b67bfe0d | 922 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 923 | struct vxlan_rdst *rd; |
6681712d | 924 | |
3e61aa8f | 925 | list_for_each_entry_rcu(rd, &f->remotes, list) { |
07a51cd3 AW |
926 | if (idx < cb->args[0]) |
927 | goto skip; | |
928 | ||
6681712d DS |
929 | err = vxlan_fdb_info(skb, vxlan, f, |
930 | NETLINK_CB(cb->skb).portid, | |
931 | cb->nlh->nlmsg_seq, | |
932 | RTM_NEWNEIGH, | |
933 | NLM_F_MULTI, rd); | |
934 | if (err < 0) | |
3e61aa8f | 935 | goto out; |
3e61aa8f | 936 | skip: |
07a51cd3 AW |
937 | ++idx; |
938 | } | |
d342894c | 939 | } |
940 | } | |
3e61aa8f | 941 | out: |
d342894c | 942 | return idx; |
943 | } | |
944 | ||
945 | /* Watch incoming packets to learn mapping between Ethernet address | |
946 | * and Tunnel endpoint. | |
c4b49512 | 947 | * Return true if packet is bogus and should be dropped. |
d342894c | 948 | */ |
26a41ae6 | 949 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 950 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 951 | { |
952 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
953 | struct vxlan_fdb *f; | |
d342894c | 954 | |
955 | f = vxlan_find_mac(vxlan, src_mac); | |
956 | if (likely(f)) { | |
5ca5461c | 957 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 958 | |
e4c7ed41 | 959 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 960 | return false; |
961 | ||
962 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 963 | if (f->state & NUD_NOARP) |
26a41ae6 | 964 | return true; |
d342894c | 965 | |
966 | if (net_ratelimit()) | |
967 | netdev_info(dev, | |
e4c7ed41 | 968 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 969 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 970 | |
e4c7ed41 | 971 | rdst->remote_ip = *src_ip; |
d342894c | 972 | f->updated = jiffies; |
9e4b93f9 | 973 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 974 | } else { |
975 | /* learned new entry */ | |
976 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 977 | |
978 | /* close off race between vxlan_flush and incoming packets */ | |
979 | if (netif_running(dev)) | |
980 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
981 | NUD_REACHABLE, | |
982 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 983 | vxlan->cfg.dst_port, |
3bf74b1a | 984 | vxlan->default_dst.remote_vni, |
985 | 0, NTF_SELF); | |
d342894c | 986 | spin_unlock(&vxlan->hash_lock); |
987 | } | |
26a41ae6 | 988 | |
989 | return false; | |
d342894c | 990 | } |
991 | ||
d342894c | 992 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 993 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 994 | { |
553675fb | 995 | struct vxlan_dev *vxlan; |
b1be00a6 | 996 | unsigned short family = dev->default_dst.remote_ip.sa.sa_family; |
d342894c | 997 | |
95ab0991 G |
998 | /* The vxlan_sock is only used by dev, leaving group has |
999 | * no effect on other vxlan devices. | |
1000 | */ | |
b1be00a6 JB |
1001 | if (family == AF_INET && dev->vn4_sock && |
1002 | atomic_read(&dev->vn4_sock->refcnt) == 1) | |
95ab0991 | 1003 | return false; |
b1be00a6 JB |
1004 | #if IS_ENABLED(CONFIG_IPV6) |
1005 | if (family == AF_INET6 && dev->vn6_sock && | |
1006 | atomic_read(&dev->vn6_sock->refcnt) == 1) | |
1007 | return false; | |
1008 | #endif | |
95ab0991 | 1009 | |
553675fb | 1010 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1011 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1012 | continue; |
d342894c | 1013 | |
b1be00a6 | 1014 | if (family == AF_INET && vxlan->vn4_sock != dev->vn4_sock) |
95ab0991 | 1015 | continue; |
b1be00a6 JB |
1016 | #if IS_ENABLED(CONFIG_IPV6) |
1017 | if (family == AF_INET6 && vxlan->vn6_sock != dev->vn6_sock) | |
1018 | continue; | |
1019 | #endif | |
95ab0991 G |
1020 | |
1021 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1022 | &dev->default_dst.remote_ip)) | |
1023 | continue; | |
1024 | ||
1025 | if (vxlan->default_dst.remote_ifindex != | |
1026 | dev->default_dst.remote_ifindex) | |
1027 | continue; | |
1028 | ||
1029 | return true; | |
553675fb | 1030 | } |
d342894c | 1031 | |
1032 | return false; | |
1033 | } | |
1034 | ||
b1be00a6 | 1035 | static void __vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 1036 | { |
b1be00a6 | 1037 | struct vxlan_net *vn; |
012a5729 | 1038 | |
b1be00a6 JB |
1039 | if (!vs) |
1040 | return; | |
7c47cedf SH |
1041 | if (!atomic_dec_and_test(&vs->refcnt)) |
1042 | return; | |
d342894c | 1043 | |
b1be00a6 | 1044 | vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
1c51a915 | 1045 | spin_lock(&vn->sock_lock); |
7c47cedf | 1046 | hlist_del_rcu(&vs->hlist); |
dc01e7d3 | 1047 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1048 | spin_unlock(&vn->sock_lock); |
1049 | ||
7c47cedf | 1050 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 1051 | } |
1052 | ||
b1be00a6 JB |
1053 | static void vxlan_sock_release(struct vxlan_dev *vxlan) |
1054 | { | |
1055 | __vxlan_sock_release(vxlan->vn4_sock); | |
1056 | #if IS_ENABLED(CONFIG_IPV6) | |
1057 | __vxlan_sock_release(vxlan->vn6_sock); | |
1058 | #endif | |
1059 | } | |
1060 | ||
56ef9c90 | 1061 | /* Update multicast group membership when first VNI on |
c4b49512 | 1062 | * multicast address is brought up |
7c47cedf | 1063 | */ |
56ef9c90 | 1064 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1065 | { |
b1be00a6 | 1066 | struct sock *sk; |
e4c7ed41 CW |
1067 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1068 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1069 | int ret = -EINVAL; |
d342894c | 1070 | |
e4c7ed41 CW |
1071 | if (ip->sa.sa_family == AF_INET) { |
1072 | struct ip_mreqn mreq = { | |
1073 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1074 | .imr_ifindex = ifindex, | |
1075 | }; | |
1076 | ||
b1be00a6 JB |
1077 | sk = vxlan->vn4_sock->sock->sk; |
1078 | lock_sock(sk); | |
56ef9c90 | 1079 | ret = ip_mc_join_group(sk, &mreq); |
b1be00a6 | 1080 | release_sock(sk); |
e4c7ed41 CW |
1081 | #if IS_ENABLED(CONFIG_IPV6) |
1082 | } else { | |
b1be00a6 JB |
1083 | sk = vxlan->vn6_sock->sock->sk; |
1084 | lock_sock(sk); | |
56ef9c90 MRL |
1085 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1086 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1087 | release_sock(sk); |
e4c7ed41 CW |
1088 | #endif |
1089 | } | |
3fc2de2f | 1090 | |
56ef9c90 | 1091 | return ret; |
3fc2de2f | 1092 | } |
1093 | ||
1094 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1095 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1096 | { |
b1be00a6 | 1097 | struct sock *sk; |
e4c7ed41 CW |
1098 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1099 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1100 | int ret = -EINVAL; |
3fc2de2f | 1101 | |
e4c7ed41 CW |
1102 | if (ip->sa.sa_family == AF_INET) { |
1103 | struct ip_mreqn mreq = { | |
1104 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1105 | .imr_ifindex = ifindex, | |
1106 | }; | |
1107 | ||
b1be00a6 JB |
1108 | sk = vxlan->vn4_sock->sock->sk; |
1109 | lock_sock(sk); | |
56ef9c90 | 1110 | ret = ip_mc_leave_group(sk, &mreq); |
b1be00a6 | 1111 | release_sock(sk); |
e4c7ed41 CW |
1112 | #if IS_ENABLED(CONFIG_IPV6) |
1113 | } else { | |
b1be00a6 JB |
1114 | sk = vxlan->vn6_sock->sock->sk; |
1115 | lock_sock(sk); | |
56ef9c90 MRL |
1116 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1117 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1118 | release_sock(sk); |
e4c7ed41 CW |
1119 | #endif |
1120 | } | |
d342894c | 1121 | |
56ef9c90 | 1122 | return ret; |
d342894c | 1123 | } |
1124 | ||
dfd8645e | 1125 | static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh, |
0ace2ca8 | 1126 | size_t hdrlen, u32 data, bool nopartial) |
dfd8645e TH |
1127 | { |
1128 | size_t start, offset, plen; | |
dfd8645e | 1129 | |
b7fe10e5 TH |
1130 | if (skb->remcsum_offload) |
1131 | return vh; | |
1132 | ||
dfd8645e TH |
1133 | start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; |
1134 | offset = start + ((data & VXLAN_RCO_UDP) ? | |
1135 | offsetof(struct udphdr, check) : | |
1136 | offsetof(struct tcphdr, check)); | |
1137 | ||
1138 | plen = hdrlen + offset + sizeof(u16); | |
1139 | ||
1140 | if (!pskb_may_pull(skb, plen)) | |
1141 | return NULL; | |
1142 | ||
1143 | vh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
1144 | ||
0ace2ca8 TH |
1145 | skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset, |
1146 | nopartial); | |
dfd8645e TH |
1147 | |
1148 | return vh; | |
1149 | } | |
1150 | ||
614732ea TG |
1151 | static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb, |
1152 | struct vxlan_metadata *md, u32 vni, | |
1153 | struct metadata_dst *tun_dst) | |
1154 | { | |
1155 | struct iphdr *oip = NULL; | |
1156 | struct ipv6hdr *oip6 = NULL; | |
1157 | struct vxlan_dev *vxlan; | |
1158 | struct pcpu_sw_netstats *stats; | |
1159 | union vxlan_addr saddr; | |
1160 | int err = 0; | |
614732ea TG |
1161 | |
1162 | /* For flow based devices, map all packets to VNI 0 */ | |
da8b43c0 | 1163 | if (vs->flags & VXLAN_F_COLLECT_METADATA) |
614732ea TG |
1164 | vni = 0; |
1165 | ||
1166 | /* Is this VNI defined? */ | |
1167 | vxlan = vxlan_vs_find_vni(vs, vni); | |
1168 | if (!vxlan) | |
1169 | goto drop; | |
1170 | ||
614732ea TG |
1171 | skb_reset_mac_header(skb); |
1172 | skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev))); | |
1173 | skb->protocol = eth_type_trans(skb, vxlan->dev); | |
1174 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1175 | ||
1176 | /* Ignore packet loops (and multicast echo) */ | |
1177 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1178 | goto drop; | |
1179 | ||
ce212d0f JB |
1180 | /* Get data from the outer IP header */ |
1181 | if (vxlan_get_sk_family(vs) == AF_INET) { | |
614732ea TG |
1182 | oip = ip_hdr(skb); |
1183 | saddr.sin.sin_addr.s_addr = oip->saddr; | |
1184 | saddr.sa.sa_family = AF_INET; | |
1185 | #if IS_ENABLED(CONFIG_IPV6) | |
1186 | } else { | |
1187 | oip6 = ipv6_hdr(skb); | |
1188 | saddr.sin6.sin6_addr = oip6->saddr; | |
1189 | saddr.sa.sa_family = AF_INET6; | |
1190 | #endif | |
1191 | } | |
1192 | ||
1193 | if (tun_dst) { | |
1194 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
1195 | tun_dst = NULL; | |
1196 | } | |
1197 | ||
1198 | if ((vxlan->flags & VXLAN_F_LEARN) && | |
1199 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) | |
1200 | goto drop; | |
1201 | ||
1202 | skb_reset_network_header(skb); | |
1203 | /* In flow-based mode, GBP is carried in dst_metadata */ | |
da8b43c0 | 1204 | if (!(vs->flags & VXLAN_F_COLLECT_METADATA)) |
614732ea TG |
1205 | skb->mark = md->gbp; |
1206 | ||
1207 | if (oip6) | |
1208 | err = IP6_ECN_decapsulate(oip6, skb); | |
1209 | if (oip) | |
1210 | err = IP_ECN_decapsulate(oip, skb); | |
1211 | ||
1212 | if (unlikely(err)) { | |
1213 | if (log_ecn_error) { | |
1214 | if (oip6) | |
1215 | net_info_ratelimited("non-ECT from %pI6\n", | |
1216 | &oip6->saddr); | |
1217 | if (oip) | |
1218 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1219 | &oip->saddr, oip->tos); | |
1220 | } | |
1221 | if (err > 1) { | |
1222 | ++vxlan->dev->stats.rx_frame_errors; | |
1223 | ++vxlan->dev->stats.rx_errors; | |
1224 | goto drop; | |
1225 | } | |
1226 | } | |
1227 | ||
1228 | stats = this_cpu_ptr(vxlan->dev->tstats); | |
1229 | u64_stats_update_begin(&stats->syncp); | |
1230 | stats->rx_packets++; | |
1231 | stats->rx_bytes += skb->len; | |
1232 | u64_stats_update_end(&stats->syncp); | |
1233 | ||
58ce31cc | 1234 | gro_cells_receive(&vxlan->gro_cells, skb); |
614732ea TG |
1235 | |
1236 | return; | |
1237 | drop: | |
1238 | if (tun_dst) | |
1239 | dst_release((struct dst_entry *)tun_dst); | |
1240 | ||
1241 | /* Consume bad packet */ | |
1242 | kfree_skb(skb); | |
1243 | } | |
1244 | ||
d342894c | 1245 | /* Callback from net/ipv4/udp.c to receive packets */ |
1246 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
1247 | { | |
ee122c79 | 1248 | struct metadata_dst *tun_dst = NULL; |
5cfccc5a | 1249 | struct vxlan_sock *vs; |
d342894c | 1250 | struct vxlanhdr *vxh; |
3bf39475 | 1251 | u32 flags, vni; |
ee122c79 TG |
1252 | struct vxlan_metadata _md; |
1253 | struct vxlan_metadata *md = &_md; | |
d342894c | 1254 | |
d342894c | 1255 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1256 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 1257 | goto error; |
1258 | ||
7ce04758 | 1259 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); |
3bf39475 TH |
1260 | flags = ntohl(vxh->vx_flags); |
1261 | vni = ntohl(vxh->vx_vni); | |
1262 | ||
1263 | if (flags & VXLAN_HF_VNI) { | |
1264 | flags &= ~VXLAN_HF_VNI; | |
1265 | } else { | |
1266 | /* VNI flag always required to be set */ | |
1267 | goto bad_flags; | |
d342894c | 1268 | } |
1269 | ||
5cfccc5a PS |
1270 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
1271 | goto drop; | |
dfd8645e | 1272 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); |
5cfccc5a | 1273 | |
559835ea | 1274 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1275 | if (!vs) |
d342894c | 1276 | goto drop; |
d342894c | 1277 | |
dfd8645e | 1278 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { |
0ace2ca8 TH |
1279 | vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni, |
1280 | !!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
1281 | if (!vxh) |
1282 | goto drop; | |
1283 | ||
1284 | flags &= ~VXLAN_HF_RCO; | |
40fb70f3 | 1285 | vni &= VXLAN_VNI_MASK; |
dfd8645e TH |
1286 | } |
1287 | ||
ee122c79 | 1288 | if (vxlan_collect_metadata(vs)) { |
c29a70d2 PS |
1289 | tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
1290 | cpu_to_be64(vni >> 8), sizeof(*md)); | |
1291 | ||
ee122c79 TG |
1292 | if (!tun_dst) |
1293 | goto drop; | |
1294 | ||
0f1b7354 | 1295 | md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
ee122c79 TG |
1296 | } else { |
1297 | memset(md, 0, sizeof(*md)); | |
1298 | } | |
1299 | ||
3511494c TG |
1300 | /* For backwards compatibility, only allow reserved fields to be |
1301 | * used by VXLAN extensions if explicitly requested. | |
1302 | */ | |
1303 | if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) { | |
1304 | struct vxlanhdr_gbp *gbp; | |
1305 | ||
1306 | gbp = (struct vxlanhdr_gbp *)vxh; | |
ee122c79 TG |
1307 | md->gbp = ntohs(gbp->policy_id); |
1308 | ||
1309 | if (tun_dst) | |
0f1b7354 | 1310 | tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
3511494c TG |
1311 | |
1312 | if (gbp->dont_learn) | |
ee122c79 | 1313 | md->gbp |= VXLAN_GBP_DONT_LEARN; |
3511494c TG |
1314 | |
1315 | if (gbp->policy_applied) | |
ee122c79 | 1316 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; |
3511494c TG |
1317 | |
1318 | flags &= ~VXLAN_GBP_USED_BITS; | |
1319 | } | |
1320 | ||
40fb70f3 | 1321 | if (flags || vni & ~VXLAN_VNI_MASK) { |
3bf39475 TH |
1322 | /* If there are any unprocessed flags remaining treat |
1323 | * this as a malformed packet. This behavior diverges from | |
1324 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1325 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1326 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1327 | * is more robust and provides a little more security in |
1328 | * adding extensions to VXLAN. | |
1329 | */ | |
1330 | ||
1331 | goto bad_flags; | |
1332 | } | |
1333 | ||
614732ea | 1334 | vxlan_rcv(vs, skb, md, vni >> 8, tun_dst); |
5cfccc5a PS |
1335 | return 0; |
1336 | ||
1337 | drop: | |
1338 | /* Consume bad packet */ | |
1339 | kfree_skb(skb); | |
1340 | return 0; | |
1341 | ||
3bf39475 TH |
1342 | bad_flags: |
1343 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1344 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
1345 | ||
5cfccc5a | 1346 | error: |
ee122c79 TG |
1347 | if (tun_dst) |
1348 | dst_release((struct dst_entry *)tun_dst); | |
1349 | ||
5cfccc5a PS |
1350 | /* Return non vxlan pkt */ |
1351 | return 1; | |
1352 | } | |
1353 | ||
e4f67add DS |
1354 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1355 | { | |
1356 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1357 | struct arphdr *parp; | |
1358 | u8 *arpptr, *sha; | |
1359 | __be32 sip, tip; | |
1360 | struct neighbour *n; | |
1361 | ||
1362 | if (dev->flags & IFF_NOARP) | |
1363 | goto out; | |
1364 | ||
1365 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1366 | dev->stats.tx_dropped++; | |
1367 | goto out; | |
1368 | } | |
1369 | parp = arp_hdr(skb); | |
1370 | ||
1371 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1372 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1373 | parp->ar_pro != htons(ETH_P_IP) || | |
1374 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1375 | parp->ar_hln != dev->addr_len || | |
1376 | parp->ar_pln != 4) | |
1377 | goto out; | |
1378 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1379 | sha = arpptr; | |
1380 | arpptr += dev->addr_len; /* sha */ | |
1381 | memcpy(&sip, arpptr, sizeof(sip)); | |
1382 | arpptr += sizeof(sip); | |
1383 | arpptr += dev->addr_len; /* tha */ | |
1384 | memcpy(&tip, arpptr, sizeof(tip)); | |
1385 | ||
1386 | if (ipv4_is_loopback(tip) || | |
1387 | ipv4_is_multicast(tip)) | |
1388 | goto out; | |
1389 | ||
1390 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1391 | ||
1392 | if (n) { | |
e4f67add DS |
1393 | struct vxlan_fdb *f; |
1394 | struct sk_buff *reply; | |
1395 | ||
1396 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1397 | neigh_release(n); | |
1398 | goto out; | |
1399 | } | |
1400 | ||
1401 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1402 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1403 | /* bridge-local neighbor */ |
1404 | neigh_release(n); | |
1405 | goto out; | |
1406 | } | |
1407 | ||
1408 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1409 | n->ha, sha); | |
1410 | ||
1411 | neigh_release(n); | |
1412 | ||
7346135d DS |
1413 | if (reply == NULL) |
1414 | goto out; | |
1415 | ||
e4f67add DS |
1416 | skb_reset_mac_header(reply); |
1417 | __skb_pull(reply, skb_network_offset(reply)); | |
1418 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1419 | reply->pkt_type = PACKET_HOST; | |
1420 | ||
1421 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1422 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1423 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1424 | union vxlan_addr ipa = { | |
1425 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1426 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1427 | }; |
1428 | ||
1429 | vxlan_ip_miss(dev, &ipa); | |
1430 | } | |
e4f67add DS |
1431 | out: |
1432 | consume_skb(skb); | |
1433 | return NETDEV_TX_OK; | |
1434 | } | |
1435 | ||
f564f45c | 1436 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1437 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1438 | struct neighbour *n, bool isrouter) | |
1439 | { | |
1440 | struct net_device *dev = request->dev; | |
1441 | struct sk_buff *reply; | |
1442 | struct nd_msg *ns, *na; | |
1443 | struct ipv6hdr *pip6; | |
1444 | u8 *daddr; | |
1445 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1446 | int ns_olen; | |
1447 | int i, len; | |
1448 | ||
1449 | if (dev == NULL) | |
1450 | return NULL; | |
1451 | ||
1452 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1453 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1454 | reply = alloc_skb(len, GFP_ATOMIC); | |
1455 | if (reply == NULL) | |
1456 | return NULL; | |
1457 | ||
1458 | reply->protocol = htons(ETH_P_IPV6); | |
1459 | reply->dev = dev; | |
1460 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1461 | skb_push(reply, sizeof(struct ethhdr)); | |
1462 | skb_set_mac_header(reply, 0); | |
1463 | ||
1464 | ns = (struct nd_msg *)skb_transport_header(request); | |
1465 | ||
1466 | daddr = eth_hdr(request)->h_source; | |
1467 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1468 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1469 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1470 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1471 | break; | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | /* Ethernet header */ | |
1476 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1477 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1478 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1479 | reply->protocol = htons(ETH_P_IPV6); | |
1480 | ||
1481 | skb_pull(reply, sizeof(struct ethhdr)); | |
1482 | skb_set_network_header(reply, 0); | |
1483 | skb_put(reply, sizeof(struct ipv6hdr)); | |
1484 | ||
1485 | /* IPv6 header */ | |
1486 | ||
1487 | pip6 = ipv6_hdr(reply); | |
1488 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1489 | pip6->version = 6; | |
1490 | pip6->priority = ipv6_hdr(request)->priority; | |
1491 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1492 | pip6->hop_limit = 255; | |
1493 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1494 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1495 | ||
1496 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
1497 | skb_set_transport_header(reply, 0); | |
1498 | ||
1499 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1500 | ||
1501 | /* Neighbor Advertisement */ | |
1502 | memset(na, 0, sizeof(*na)+na_olen); | |
1503 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1504 | na->icmph.icmp6_router = isrouter; | |
1505 | na->icmph.icmp6_override = 1; | |
1506 | na->icmph.icmp6_solicited = 1; | |
1507 | na->target = ns->target; | |
1508 | ether_addr_copy(&na->opt[2], n->ha); | |
1509 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1510 | na->opt[1] = na_olen >> 3; | |
1511 | ||
1512 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1513 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1514 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1515 | ||
1516 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1517 | ||
1518 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1519 | ||
1520 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1521 | ||
1522 | return reply; | |
1523 | } | |
1524 | ||
f564f45c CW |
1525 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1526 | { | |
1527 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1528 | struct nd_msg *msg; |
f564f45c CW |
1529 | const struct ipv6hdr *iphdr; |
1530 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1531 | struct neighbour *n; |
1532 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1533 | |
1534 | in6_dev = __in6_dev_get(dev); | |
1535 | if (!in6_dev) | |
1536 | goto out; | |
1537 | ||
f564f45c CW |
1538 | iphdr = ipv6_hdr(skb); |
1539 | saddr = &iphdr->saddr; | |
1540 | daddr = &iphdr->daddr; | |
1541 | ||
f564f45c CW |
1542 | msg = (struct nd_msg *)skb_transport_header(skb); |
1543 | if (msg->icmph.icmp6_code != 0 || | |
1544 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1545 | goto out; | |
1546 | ||
4b29dba9 DS |
1547 | if (ipv6_addr_loopback(daddr) || |
1548 | ipv6_addr_is_multicast(&msg->target)) | |
1549 | goto out; | |
1550 | ||
1551 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1552 | |
1553 | if (n) { | |
1554 | struct vxlan_fdb *f; | |
4b29dba9 | 1555 | struct sk_buff *reply; |
f564f45c CW |
1556 | |
1557 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1558 | neigh_release(n); | |
1559 | goto out; | |
1560 | } | |
1561 | ||
1562 | f = vxlan_find_mac(vxlan, n->ha); | |
1563 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1564 | /* bridge-local neighbor */ | |
1565 | neigh_release(n); | |
1566 | goto out; | |
1567 | } | |
1568 | ||
4b29dba9 DS |
1569 | reply = vxlan_na_create(skb, n, |
1570 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1571 | ||
f564f45c | 1572 | neigh_release(n); |
4b29dba9 DS |
1573 | |
1574 | if (reply == NULL) | |
1575 | goto out; | |
1576 | ||
1577 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1578 | dev->stats.rx_dropped++; | |
1579 | ||
f564f45c | 1580 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1581 | union vxlan_addr ipa = { |
1582 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1583 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1584 | }; |
1585 | ||
f564f45c CW |
1586 | vxlan_ip_miss(dev, &ipa); |
1587 | } | |
1588 | ||
1589 | out: | |
1590 | consume_skb(skb); | |
1591 | return NETDEV_TX_OK; | |
1592 | } | |
1593 | #endif | |
1594 | ||
e4f67add DS |
1595 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1596 | { | |
1597 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1598 | struct neighbour *n; | |
e4f67add DS |
1599 | |
1600 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1601 | return false; | |
1602 | ||
1603 | n = NULL; | |
1604 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1605 | case ETH_P_IP: | |
e15a00aa CW |
1606 | { |
1607 | struct iphdr *pip; | |
1608 | ||
e4f67add DS |
1609 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1610 | return false; | |
1611 | pip = ip_hdr(skb); | |
1612 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1613 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1614 | union vxlan_addr ipa = { | |
1615 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 1616 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1617 | }; |
1618 | ||
1619 | vxlan_ip_miss(dev, &ipa); | |
1620 | return false; | |
1621 | } | |
1622 | ||
e4f67add | 1623 | break; |
e15a00aa CW |
1624 | } |
1625 | #if IS_ENABLED(CONFIG_IPV6) | |
1626 | case ETH_P_IPV6: | |
1627 | { | |
1628 | struct ipv6hdr *pip6; | |
1629 | ||
1630 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1631 | return false; | |
1632 | pip6 = ipv6_hdr(skb); | |
1633 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1634 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1635 | union vxlan_addr ipa = { | |
1636 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 1637 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
1638 | }; |
1639 | ||
1640 | vxlan_ip_miss(dev, &ipa); | |
1641 | return false; | |
1642 | } | |
1643 | ||
1644 | break; | |
1645 | } | |
1646 | #endif | |
e4f67add DS |
1647 | default: |
1648 | return false; | |
1649 | } | |
1650 | ||
1651 | if (n) { | |
1652 | bool diff; | |
1653 | ||
7367d0b5 | 1654 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1655 | if (diff) { |
1656 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1657 | dev->addr_len); | |
1658 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1659 | } | |
1660 | neigh_release(n); | |
1661 | return diff; | |
e4c7ed41 CW |
1662 | } |
1663 | ||
e4f67add DS |
1664 | return false; |
1665 | } | |
1666 | ||
af33c1ad | 1667 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
1668 | struct vxlan_metadata *md) |
1669 | { | |
1670 | struct vxlanhdr_gbp *gbp; | |
1671 | ||
db79a621 TG |
1672 | if (!md->gbp) |
1673 | return; | |
1674 | ||
3511494c TG |
1675 | gbp = (struct vxlanhdr_gbp *)vxh; |
1676 | vxh->vx_flags |= htonl(VXLAN_HF_GBP); | |
1677 | ||
1678 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
1679 | gbp->dont_learn = 1; | |
1680 | ||
1681 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
1682 | gbp->policy_applied = 1; | |
1683 | ||
1684 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
1685 | } | |
1686 | ||
e4c7ed41 | 1687 | #if IS_ENABLED(CONFIG_IPV6) |
79b16aad DM |
1688 | static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
1689 | struct sk_buff *skb, | |
e4c7ed41 CW |
1690 | struct net_device *dev, struct in6_addr *saddr, |
1691 | struct in6_addr *daddr, __u8 prio, __u8 ttl, | |
6b6948dd | 1692 | __be16 src_port, __be16 dst_port, __be32 vni, |
af33c1ad | 1693 | struct vxlan_metadata *md, bool xnet, u32 vxflags) |
e4c7ed41 | 1694 | { |
e4c7ed41 | 1695 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
1696 | int min_headroom; |
1697 | int err; | |
af33c1ad | 1698 | bool udp_sum = !(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX); |
dfd8645e TH |
1699 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1700 | u16 hdrlen = sizeof(struct vxlanhdr); | |
1701 | ||
af33c1ad | 1702 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1703 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1704 | int csum_start = skb_checksum_start_offset(skb); | |
1705 | ||
1706 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1707 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1708 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
1709 | skb->csum_offset == offsetof(struct tcphdr, check))) { | |
1710 | udp_sum = false; | |
1711 | type |= SKB_GSO_TUNNEL_REMCSUM; | |
1712 | } | |
1713 | } | |
e4c7ed41 | 1714 | |
f01ec1c0 | 1715 | skb_scrub_packet(skb, xnet); |
963a88b3 | 1716 | |
e4c7ed41 CW |
1717 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
1718 | + VXLAN_HLEN + sizeof(struct ipv6hdr) | |
df8a39de | 1719 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
e4c7ed41 CW |
1720 | |
1721 | /* Need space for new headers (invalidates iph ptr) */ | |
1722 | err = skb_cow_head(skb, min_headroom); | |
74f47278 PS |
1723 | if (unlikely(err)) { |
1724 | kfree_skb(skb); | |
1725 | goto err; | |
1726 | } | |
e4c7ed41 | 1727 | |
5968250c | 1728 | skb = vlan_hwaccel_push_inside(skb); |
74f47278 PS |
1729 | if (WARN_ON(!skb)) { |
1730 | err = -ENOMEM; | |
1731 | goto err; | |
1732 | } | |
e4c7ed41 | 1733 | |
b736a623 JG |
1734 | skb = iptunnel_handle_offloads(skb, udp_sum, type); |
1735 | if (IS_ERR(skb)) { | |
1736 | err = -EINVAL; | |
1737 | goto err; | |
1738 | } | |
1739 | ||
e4c7ed41 | 1740 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
3bf39475 | 1741 | vxh->vx_flags = htonl(VXLAN_HF_VNI); |
614732ea | 1742 | vxh->vx_vni = vni; |
e4c7ed41 | 1743 | |
dfd8645e TH |
1744 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
1745 | u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> | |
1746 | VXLAN_RCO_SHIFT; | |
1747 | ||
1748 | if (skb->csum_offset == offsetof(struct udphdr, check)) | |
1749 | data |= VXLAN_RCO_UDP; | |
1750 | ||
1751 | vxh->vx_vni |= htonl(data); | |
1752 | vxh->vx_flags |= htonl(VXLAN_HF_RCO); | |
1753 | ||
1754 | if (!skb_is_gso(skb)) { | |
1755 | skb->ip_summed = CHECKSUM_NONE; | |
1756 | skb->encapsulation = 0; | |
1757 | } | |
1758 | } | |
1759 | ||
af33c1ad TH |
1760 | if (vxflags & VXLAN_F_GBP) |
1761 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
3511494c | 1762 | |
996c9fd1 TH |
1763 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
1764 | ||
79b16aad | 1765 | udp_tunnel6_xmit_skb(dst, sk, skb, dev, saddr, daddr, prio, |
d998f8ef | 1766 | ttl, src_port, dst_port, |
af33c1ad | 1767 | !!(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX)); |
e4c7ed41 | 1768 | return 0; |
74f47278 PS |
1769 | err: |
1770 | dst_release(dst); | |
1771 | return err; | |
e4c7ed41 CW |
1772 | } |
1773 | #endif | |
1774 | ||
614732ea TG |
1775 | static int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, |
1776 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, | |
6b6948dd | 1777 | __be16 src_port, __be16 dst_port, __be32 vni, |
614732ea | 1778 | struct vxlan_metadata *md, bool xnet, u32 vxflags) |
49560532 PS |
1779 | { |
1780 | struct vxlanhdr *vxh; | |
649c5b8b | 1781 | int min_headroom; |
49560532 | 1782 | int err; |
af33c1ad | 1783 | bool udp_sum = !!(vxflags & VXLAN_F_UDP_CSUM); |
dfd8645e TH |
1784 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1785 | u16 hdrlen = sizeof(struct vxlanhdr); | |
1786 | ||
af33c1ad | 1787 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1788 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1789 | int csum_start = skb_checksum_start_offset(skb); | |
1790 | ||
1791 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1792 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1793 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
1794 | skb->csum_offset == offsetof(struct tcphdr, check))) { | |
1795 | udp_sum = false; | |
1796 | type |= SKB_GSO_TUNNEL_REMCSUM; | |
1797 | } | |
1798 | } | |
49560532 | 1799 | |
649c5b8b | 1800 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 | 1801 | + VXLAN_HLEN + sizeof(struct iphdr) |
df8a39de | 1802 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
649c5b8b PS |
1803 | |
1804 | /* Need space for new headers (invalidates iph ptr) */ | |
1805 | err = skb_cow_head(skb, min_headroom); | |
74f47278 PS |
1806 | if (unlikely(err)) { |
1807 | kfree_skb(skb); | |
649c5b8b | 1808 | return err; |
74f47278 | 1809 | } |
649c5b8b | 1810 | |
5968250c JP |
1811 | skb = vlan_hwaccel_push_inside(skb); |
1812 | if (WARN_ON(!skb)) | |
1813 | return -ENOMEM; | |
1eaa8178 | 1814 | |
b736a623 JG |
1815 | skb = iptunnel_handle_offloads(skb, udp_sum, type); |
1816 | if (IS_ERR(skb)) | |
1817 | return PTR_ERR(skb); | |
1818 | ||
49560532 | 1819 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
3bf39475 | 1820 | vxh->vx_flags = htonl(VXLAN_HF_VNI); |
614732ea | 1821 | vxh->vx_vni = vni; |
49560532 | 1822 | |
dfd8645e TH |
1823 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
1824 | u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> | |
1825 | VXLAN_RCO_SHIFT; | |
1826 | ||
1827 | if (skb->csum_offset == offsetof(struct udphdr, check)) | |
1828 | data |= VXLAN_RCO_UDP; | |
1829 | ||
1830 | vxh->vx_vni |= htonl(data); | |
1831 | vxh->vx_flags |= htonl(VXLAN_HF_RCO); | |
1832 | ||
1833 | if (!skb_is_gso(skb)) { | |
1834 | skb->ip_summed = CHECKSUM_NONE; | |
1835 | skb->encapsulation = 0; | |
1836 | } | |
1837 | } | |
1838 | ||
af33c1ad TH |
1839 | if (vxflags & VXLAN_F_GBP) |
1840 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
3511494c | 1841 | |
996c9fd1 TH |
1842 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
1843 | ||
039f5062 PS |
1844 | udp_tunnel_xmit_skb(rt, sk, skb, src, dst, tos, ttl, df, |
1845 | src_port, dst_port, xnet, | |
1846 | !(vxflags & VXLAN_F_UDP_CSUM)); | |
1847 | return 0; | |
49560532 | 1848 | } |
49560532 | 1849 | |
e5d4b29f JB |
1850 | #if IS_ENABLED(CONFIG_IPV6) |
1851 | static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan, | |
1852 | struct sk_buff *skb, int oif, | |
1853 | const struct in6_addr *daddr, | |
1854 | struct in6_addr *saddr) | |
1855 | { | |
1856 | struct dst_entry *ndst; | |
1857 | struct flowi6 fl6; | |
1858 | int err; | |
1859 | ||
1860 | memset(&fl6, 0, sizeof(fl6)); | |
1861 | fl6.flowi6_oif = oif; | |
1862 | fl6.daddr = *daddr; | |
1863 | fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr; | |
1864 | fl6.flowi6_mark = skb->mark; | |
1865 | fl6.flowi6_proto = IPPROTO_UDP; | |
1866 | ||
1867 | err = ipv6_stub->ipv6_dst_lookup(vxlan->net, | |
1868 | vxlan->vn6_sock->sock->sk, | |
1869 | &ndst, &fl6); | |
1870 | if (err < 0) | |
1871 | return ERR_PTR(err); | |
1872 | ||
1873 | *saddr = fl6.saddr; | |
1874 | return ndst; | |
1875 | } | |
1876 | #endif | |
1877 | ||
9dcc71e1 SS |
1878 | /* Bypass encapsulation if the destination is local */ |
1879 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1880 | struct vxlan_dev *dst_vxlan) | |
1881 | { | |
8f84985f | 1882 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1883 | union vxlan_addr loopback; |
1884 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
1885 | struct net_device *dev = skb->dev; |
1886 | int len = skb->len; | |
9dcc71e1 | 1887 | |
8f84985f LR |
1888 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1889 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1890 | skb->pkt_type = PACKET_HOST; |
1891 | skb->encapsulation = 0; | |
1892 | skb->dev = dst_vxlan->dev; | |
1893 | __skb_pull(skb, skb_network_offset(skb)); | |
1894 | ||
e4c7ed41 CW |
1895 | if (remote_ip->sa.sa_family == AF_INET) { |
1896 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1897 | loopback.sa.sa_family = AF_INET; | |
1898 | #if IS_ENABLED(CONFIG_IPV6) | |
1899 | } else { | |
1900 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1901 | loopback.sa.sa_family = AF_INET6; | |
1902 | #endif | |
1903 | } | |
1904 | ||
9dcc71e1 | 1905 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1906 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1907 | |
1908 | u64_stats_update_begin(&tx_stats->syncp); | |
1909 | tx_stats->tx_packets++; | |
ce6502a8 | 1910 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
1911 | u64_stats_update_end(&tx_stats->syncp); |
1912 | ||
1913 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1914 | u64_stats_update_begin(&rx_stats->syncp); | |
1915 | rx_stats->rx_packets++; | |
ce6502a8 | 1916 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
1917 | u64_stats_update_end(&rx_stats->syncp); |
1918 | } else { | |
ce6502a8 | 1919 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
1920 | } |
1921 | } | |
1922 | ||
4ad16930 SH |
1923 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1924 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1925 | { |
3093fbe7 | 1926 | struct ip_tunnel_info *info; |
d342894c | 1927 | struct vxlan_dev *vxlan = netdev_priv(dev); |
b1be00a6 | 1928 | struct sock *sk; |
e4c7ed41 | 1929 | struct rtable *rt = NULL; |
d342894c | 1930 | const struct iphdr *old_iph; |
d342894c | 1931 | struct flowi4 fl4; |
e4c7ed41 | 1932 | union vxlan_addr *dst; |
ee122c79 TG |
1933 | union vxlan_addr remote_ip; |
1934 | struct vxlan_metadata _md; | |
1935 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 1936 | __be16 src_port = 0, dst_port; |
234f5b73 | 1937 | u32 vni; |
d342894c | 1938 | __be16 df = 0; |
1939 | __u8 tos, ttl; | |
0e6fbc5b | 1940 | int err; |
ee122c79 | 1941 | u32 flags = vxlan->flags; |
d342894c | 1942 | |
61adedf3 | 1943 | info = skb_tunnel_info(skb); |
3093fbe7 | 1944 | |
ee122c79 | 1945 | if (rdst) { |
0dfbdf41 | 1946 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
ee122c79 TG |
1947 | vni = rdst->remote_vni; |
1948 | dst = &rdst->remote_ip; | |
1949 | } else { | |
1950 | if (!info) { | |
1951 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
1952 | dev->name); | |
1953 | goto drop; | |
1954 | } | |
0dfbdf41 | 1955 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
ee122c79 | 1956 | vni = be64_to_cpu(info->key.tun_id); |
b1be00a6 JB |
1957 | remote_ip.sa.sa_family = ip_tunnel_info_af(info); |
1958 | if (remote_ip.sa.sa_family == AF_INET) | |
a725e514 JB |
1959 | remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; |
1960 | else | |
1961 | remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; | |
ee122c79 TG |
1962 | dst = &remote_ip; |
1963 | } | |
e4f67add | 1964 | |
e4c7ed41 | 1965 | if (vxlan_addr_any(dst)) { |
e4f67add | 1966 | if (did_rsc) { |
e4f67add | 1967 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1968 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1969 | return; |
e4f67add | 1970 | } |
ef59febe | 1971 | goto drop; |
e4f67add | 1972 | } |
ef59febe | 1973 | |
d342894c | 1974 | old_iph = ip_hdr(skb); |
1975 | ||
0dfbdf41 | 1976 | ttl = vxlan->cfg.ttl; |
e4c7ed41 | 1977 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1978 | ttl = 1; |
1979 | ||
0dfbdf41 | 1980 | tos = vxlan->cfg.tos; |
d342894c | 1981 | if (tos == 1) |
206aaafc | 1982 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1983 | |
0dfbdf41 TG |
1984 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
1985 | vxlan->cfg.port_max, true); | |
d342894c | 1986 | |
a725e514 JB |
1987 | if (info) { |
1988 | if (info->key.tun_flags & TUNNEL_CSUM) | |
1989 | flags |= VXLAN_F_UDP_CSUM; | |
1990 | else | |
1991 | flags &= ~VXLAN_F_UDP_CSUM; | |
1992 | ||
1993 | ttl = info->key.ttl; | |
1994 | tos = info->key.tos; | |
1995 | ||
1996 | if (info->options_len) | |
4c222798 | 1997 | md = ip_tunnel_info_opts(info); |
a725e514 JB |
1998 | } else { |
1999 | md->gbp = skb->mark; | |
2000 | } | |
2001 | ||
e4c7ed41 | 2002 | if (dst->sa.sa_family == AF_INET) { |
b1be00a6 JB |
2003 | if (!vxlan->vn4_sock) |
2004 | goto drop; | |
2005 | sk = vxlan->vn4_sock->sock->sk; | |
2006 | ||
a725e514 JB |
2007 | if (info && (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)) |
2008 | df = htons(IP_DF); | |
ee122c79 | 2009 | |
e4c7ed41 | 2010 | memset(&fl4, 0, sizeof(fl4)); |
ee122c79 | 2011 | fl4.flowi4_oif = rdst ? rdst->remote_ifindex : 0; |
e4c7ed41 | 2012 | fl4.flowi4_tos = RT_TOS(tos); |
239fb791 TG |
2013 | fl4.flowi4_mark = skb->mark; |
2014 | fl4.flowi4_proto = IPPROTO_UDP; | |
e4c7ed41 | 2015 | fl4.daddr = dst->sin.sin_addr.s_addr; |
0dfbdf41 | 2016 | fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr; |
e4c7ed41 | 2017 | |
f01ec1c0 | 2018 | rt = ip_route_output_key(vxlan->net, &fl4); |
e4c7ed41 CW |
2019 | if (IS_ERR(rt)) { |
2020 | netdev_dbg(dev, "no route to %pI4\n", | |
2021 | &dst->sin.sin_addr.s_addr); | |
2022 | dev->stats.tx_carrier_errors++; | |
2023 | goto tx_error; | |
2024 | } | |
d342894c | 2025 | |
e4c7ed41 CW |
2026 | if (rt->dst.dev == dev) { |
2027 | netdev_dbg(dev, "circular route to %pI4\n", | |
2028 | &dst->sin.sin_addr.s_addr); | |
2029 | dev->stats.collisions++; | |
fffc15a5 | 2030 | goto rt_tx_error; |
e4c7ed41 CW |
2031 | } |
2032 | ||
2033 | /* Bypass encapsulation if the destination is local */ | |
2034 | if (rt->rt_flags & RTCF_LOCAL && | |
2035 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
2036 | struct vxlan_dev *dst_vxlan; | |
2037 | ||
2038 | ip_rt_put(rt); | |
19ca9fc1 | 2039 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
2040 | dst->sa.sa_family, dst_port, |
2041 | vxlan->flags); | |
e4c7ed41 CW |
2042 | if (!dst_vxlan) |
2043 | goto tx_error; | |
2044 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
2045 | return; | |
2046 | } | |
2047 | ||
2048 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); | |
2049 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
79b16aad | 2050 | err = vxlan_xmit_skb(rt, sk, skb, fl4.saddr, |
af33c1ad | 2051 | dst->sin.sin_addr.s_addr, tos, ttl, df, |
614732ea | 2052 | src_port, dst_port, htonl(vni << 8), md, |
af33c1ad | 2053 | !net_eq(vxlan->net, dev_net(vxlan->dev)), |
ee122c79 | 2054 | flags); |
74f47278 PS |
2055 | if (err < 0) { |
2056 | /* skb is already freed. */ | |
2057 | skb = NULL; | |
e4c7ed41 | 2058 | goto rt_tx_error; |
74f47278 | 2059 | } |
e4c7ed41 CW |
2060 | #if IS_ENABLED(CONFIG_IPV6) |
2061 | } else { | |
e4c7ed41 | 2062 | struct dst_entry *ndst; |
e5d4b29f | 2063 | struct in6_addr saddr; |
6f264e47 | 2064 | u32 rt6i_flags; |
e4c7ed41 | 2065 | |
b1be00a6 JB |
2066 | if (!vxlan->vn6_sock) |
2067 | goto drop; | |
2068 | sk = vxlan->vn6_sock->sock->sk; | |
2069 | ||
e5d4b29f JB |
2070 | ndst = vxlan6_get_route(vxlan, skb, |
2071 | rdst ? rdst->remote_ifindex : 0, | |
2072 | &dst->sin6.sin6_addr, &saddr); | |
2073 | if (IS_ERR(ndst)) { | |
e4c7ed41 CW |
2074 | netdev_dbg(dev, "no route to %pI6\n", |
2075 | &dst->sin6.sin6_addr); | |
2076 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 2077 | goto tx_error; |
e4c7ed41 | 2078 | } |
d342894c | 2079 | |
e4c7ed41 CW |
2080 | if (ndst->dev == dev) { |
2081 | netdev_dbg(dev, "circular route to %pI6\n", | |
2082 | &dst->sin6.sin6_addr); | |
2083 | dst_release(ndst); | |
2084 | dev->stats.collisions++; | |
2085 | goto tx_error; | |
2086 | } | |
0e6fbc5b | 2087 | |
e4c7ed41 | 2088 | /* Bypass encapsulation if the destination is local */ |
6f264e47 JB |
2089 | rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; |
2090 | if (rt6i_flags & RTF_LOCAL && | |
2091 | !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
e4c7ed41 CW |
2092 | struct vxlan_dev *dst_vxlan; |
2093 | ||
2094 | dst_release(ndst); | |
19ca9fc1 | 2095 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
2096 | dst->sa.sa_family, dst_port, |
2097 | vxlan->flags); | |
e4c7ed41 CW |
2098 | if (!dst_vxlan) |
2099 | goto tx_error; | |
2100 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
2101 | return; | |
2102 | } | |
49560532 | 2103 | |
e4c7ed41 | 2104 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
e5d4b29f | 2105 | err = vxlan6_xmit_skb(ndst, sk, skb, dev, &saddr, &dst->sin6.sin6_addr, |
614732ea | 2106 | 0, ttl, src_port, dst_port, htonl(vni << 8), md, |
af33c1ad | 2107 | !net_eq(vxlan->net, dev_net(vxlan->dev)), |
a725e514 | 2108 | flags); |
e4c7ed41 CW |
2109 | #endif |
2110 | } | |
0e6fbc5b | 2111 | |
4ad16930 | 2112 | return; |
d342894c | 2113 | |
2114 | drop: | |
2115 | dev->stats.tx_dropped++; | |
2116 | goto tx_free; | |
2117 | ||
49560532 PS |
2118 | rt_tx_error: |
2119 | ip_rt_put(rt); | |
d342894c | 2120 | tx_error: |
2121 | dev->stats.tx_errors++; | |
2122 | tx_free: | |
2123 | dev_kfree_skb(skb); | |
d342894c | 2124 | } |
2125 | ||
6681712d DS |
2126 | /* Transmit local packets over Vxlan |
2127 | * | |
2128 | * Outer IP header inherits ECN and DF from inner header. | |
2129 | * Outer UDP destination is the VXLAN assigned port. | |
2130 | * source port is based on hash of flow | |
2131 | */ | |
2132 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2133 | { | |
2134 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3093fbe7 | 2135 | const struct ip_tunnel_info *info; |
6681712d DS |
2136 | struct ethhdr *eth; |
2137 | bool did_rsc = false; | |
8f646c92 | 2138 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 2139 | struct vxlan_fdb *f; |
6681712d | 2140 | |
61adedf3 | 2141 | info = skb_tunnel_info(skb); |
3093fbe7 | 2142 | |
6681712d DS |
2143 | skb_reset_mac_header(skb); |
2144 | eth = eth_hdr(skb); | |
2145 | ||
f564f45c CW |
2146 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
2147 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
2148 | return arp_reduce(dev, skb); | |
2149 | #if IS_ENABLED(CONFIG_IPV6) | |
2150 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
91269e39 LR |
2151 | pskb_may_pull(skb, sizeof(struct ipv6hdr) |
2152 | + sizeof(struct nd_msg)) && | |
f564f45c CW |
2153 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { |
2154 | struct nd_msg *msg; | |
2155 | ||
2156 | msg = (struct nd_msg *)skb_transport_header(skb); | |
2157 | if (msg->icmph.icmp6_code == 0 && | |
2158 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
2159 | return neigh_reduce(dev, skb); | |
2160 | } | |
7a9f526f | 2161 | eth = eth_hdr(skb); |
f564f45c CW |
2162 | #endif |
2163 | } | |
6681712d | 2164 | |
da8b43c0 | 2165 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA && |
46fa062a | 2166 | info && info->mode & IP_TUNNEL_INFO_TX) { |
ee122c79 TG |
2167 | vxlan_xmit_one(skb, dev, NULL, false); |
2168 | return NETDEV_TX_OK; | |
2169 | } | |
2170 | ||
6681712d | 2171 | f = vxlan_find_mac(vxlan, eth->h_dest); |
ae884082 DS |
2172 | did_rsc = false; |
2173 | ||
2174 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
2175 | (ntohs(eth->h_proto) == ETH_P_IP || |
2176 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2177 | did_rsc = route_shortcircuit(dev, skb); |
2178 | if (did_rsc) | |
2179 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
2180 | } | |
2181 | ||
6681712d | 2182 | if (f == NULL) { |
afbd8bae MR |
2183 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
2184 | if (f == NULL) { | |
2185 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
2186 | !is_multicast_ether_addr(eth->h_dest)) | |
2187 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2188 | ||
2189 | dev->stats.tx_dropped++; | |
8f646c92 | 2190 | kfree_skb(skb); |
afbd8bae MR |
2191 | return NETDEV_TX_OK; |
2192 | } | |
2193 | } | |
6681712d | 2194 | |
afbd8bae MR |
2195 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2196 | struct sk_buff *skb1; | |
6681712d | 2197 | |
8f646c92 ED |
2198 | if (!fdst) { |
2199 | fdst = rdst; | |
2200 | continue; | |
2201 | } | |
afbd8bae MR |
2202 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2203 | if (skb1) | |
2204 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
2205 | } |
2206 | ||
8f646c92 ED |
2207 | if (fdst) |
2208 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
2209 | else | |
2210 | kfree_skb(skb); | |
4ad16930 | 2211 | return NETDEV_TX_OK; |
6681712d DS |
2212 | } |
2213 | ||
d342894c | 2214 | /* Walk the forwarding table and purge stale entries */ |
2215 | static void vxlan_cleanup(unsigned long arg) | |
2216 | { | |
2217 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2218 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2219 | unsigned int h; | |
2220 | ||
2221 | if (!netif_running(vxlan->dev)) | |
2222 | return; | |
2223 | ||
d342894c | 2224 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2225 | struct hlist_node *p, *n; | |
14e1d0fa SD |
2226 | |
2227 | spin_lock_bh(&vxlan->hash_lock); | |
d342894c | 2228 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2229 | struct vxlan_fdb *f | |
2230 | = container_of(p, struct vxlan_fdb, hlist); | |
2231 | unsigned long timeout; | |
2232 | ||
3c172868 | 2233 | if (f->state & NUD_PERMANENT) |
d342894c | 2234 | continue; |
2235 | ||
0dfbdf41 | 2236 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2237 | if (time_before_eq(timeout, jiffies)) { |
2238 | netdev_dbg(vxlan->dev, | |
2239 | "garbage collect %pM\n", | |
2240 | f->eth_addr); | |
2241 | f->state = NUD_STALE; | |
2242 | vxlan_fdb_destroy(vxlan, f); | |
2243 | } else if (time_before(timeout, next_timer)) | |
2244 | next_timer = timeout; | |
2245 | } | |
14e1d0fa | 2246 | spin_unlock_bh(&vxlan->hash_lock); |
d342894c | 2247 | } |
d342894c | 2248 | |
2249 | mod_timer(&vxlan->age_timer, next_timer); | |
2250 | } | |
2251 | ||
9c2e24e1 PS |
2252 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2253 | { | |
56ef9c90 | 2254 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
9c2e24e1 PS |
2255 | __u32 vni = vxlan->default_dst.remote_vni; |
2256 | ||
56ef9c90 | 2257 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 2258 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); |
56ef9c90 | 2259 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
2260 | } |
2261 | ||
d342894c | 2262 | /* Setup stats when device is created */ |
2263 | static int vxlan_init(struct net_device *dev) | |
2264 | { | |
1c213bd2 | 2265 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2266 | if (!dev->tstats) |
d342894c | 2267 | return -ENOMEM; |
2268 | ||
2269 | return 0; | |
2270 | } | |
2271 | ||
ba609e9b | 2272 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2273 | { |
2274 | struct vxlan_fdb *f; | |
2275 | ||
2276 | spin_lock_bh(&vxlan->hash_lock); | |
2277 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2278 | if (f) | |
2279 | vxlan_fdb_destroy(vxlan, f); | |
2280 | spin_unlock_bh(&vxlan->hash_lock); | |
2281 | } | |
2282 | ||
ebf4063e SH |
2283 | static void vxlan_uninit(struct net_device *dev) |
2284 | { | |
2285 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 2286 | |
ba609e9b | 2287 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2288 | |
ebf4063e SH |
2289 | free_percpu(dev->tstats); |
2290 | } | |
2291 | ||
d342894c | 2292 | /* Start ageing timer and join group when device is brought up */ |
2293 | static int vxlan_open(struct net_device *dev) | |
2294 | { | |
2295 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
205f356d | 2296 | int ret; |
56ef9c90 | 2297 | |
205f356d JB |
2298 | ret = vxlan_sock_add(vxlan); |
2299 | if (ret < 0) | |
2300 | return ret; | |
d342894c | 2301 | |
79d4a94f | 2302 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 | 2303 | ret = vxlan_igmp_join(vxlan); |
bef0057b MRL |
2304 | if (ret == -EADDRINUSE) |
2305 | ret = 0; | |
56ef9c90 | 2306 | if (ret) { |
205f356d | 2307 | vxlan_sock_release(vxlan); |
56ef9c90 MRL |
2308 | return ret; |
2309 | } | |
d342894c | 2310 | } |
2311 | ||
0dfbdf41 | 2312 | if (vxlan->cfg.age_interval) |
d342894c | 2313 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
2314 | ||
56ef9c90 | 2315 | return ret; |
d342894c | 2316 | } |
2317 | ||
2318 | /* Purge the forwarding table */ | |
2319 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2320 | { | |
31fec5aa | 2321 | unsigned int h; |
d342894c | 2322 | |
2323 | spin_lock_bh(&vxlan->hash_lock); | |
2324 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2325 | struct hlist_node *p, *n; | |
2326 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2327 | struct vxlan_fdb *f | |
2328 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2329 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2330 | if (!is_zero_ether_addr(f->eth_addr)) | |
2331 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2332 | } |
2333 | } | |
2334 | spin_unlock_bh(&vxlan->hash_lock); | |
2335 | } | |
2336 | ||
2337 | /* Cleanup timer and forwarding table on shutdown */ | |
2338 | static int vxlan_stop(struct net_device *dev) | |
2339 | { | |
2340 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2341 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
56ef9c90 | 2342 | int ret = 0; |
d342894c | 2343 | |
24c0e683 | 2344 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 2345 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 2346 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 2347 | |
2348 | del_timer_sync(&vxlan->age_timer); | |
2349 | ||
2350 | vxlan_flush(vxlan); | |
205f356d | 2351 | vxlan_sock_release(vxlan); |
d342894c | 2352 | |
56ef9c90 | 2353 | return ret; |
d342894c | 2354 | } |
2355 | ||
d342894c | 2356 | /* Stub, nothing needs to be done. */ |
2357 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2358 | { | |
2359 | } | |
2360 | ||
345010b5 DB |
2361 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2362 | { | |
2363 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2364 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2365 | struct net_device *lowerdev; | |
2366 | int max_mtu; | |
2367 | ||
f01ec1c0 | 2368 | lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex); |
345010b5 DB |
2369 | if (lowerdev == NULL) |
2370 | return eth_change_mtu(dev, new_mtu); | |
2371 | ||
2372 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
2373 | max_mtu = lowerdev->mtu - VXLAN6_HEADROOM; | |
2374 | else | |
2375 | max_mtu = lowerdev->mtu - VXLAN_HEADROOM; | |
2376 | ||
2377 | if (new_mtu < 68 || new_mtu > max_mtu) | |
2378 | return -EINVAL; | |
2379 | ||
2380 | dev->mtu = new_mtu; | |
2381 | return 0; | |
2382 | } | |
2383 | ||
fc4099f1 PS |
2384 | static int egress_ipv4_tun_info(struct net_device *dev, struct sk_buff *skb, |
2385 | struct ip_tunnel_info *info, | |
2386 | __be16 sport, __be16 dport) | |
2387 | { | |
2388 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2389 | struct rtable *rt; | |
2390 | struct flowi4 fl4; | |
2391 | ||
2392 | memset(&fl4, 0, sizeof(fl4)); | |
2393 | fl4.flowi4_tos = RT_TOS(info->key.tos); | |
2394 | fl4.flowi4_mark = skb->mark; | |
2395 | fl4.flowi4_proto = IPPROTO_UDP; | |
2396 | fl4.daddr = info->key.u.ipv4.dst; | |
2397 | ||
2398 | rt = ip_route_output_key(vxlan->net, &fl4); | |
2399 | if (IS_ERR(rt)) | |
2400 | return PTR_ERR(rt); | |
2401 | ip_rt_put(rt); | |
2402 | ||
2403 | info->key.u.ipv4.src = fl4.saddr; | |
2404 | info->key.tp_src = sport; | |
2405 | info->key.tp_dst = dport; | |
2406 | return 0; | |
2407 | } | |
2408 | ||
2409 | static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) | |
2410 | { | |
2411 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2412 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
2413 | __be16 sport, dport; | |
2414 | ||
2415 | sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, | |
2416 | vxlan->cfg.port_max, true); | |
2417 | dport = info->key.tp_dst ? : vxlan->cfg.dst_port; | |
2418 | ||
239e944f JB |
2419 | if (ip_tunnel_info_af(info) == AF_INET) { |
2420 | if (!vxlan->vn4_sock) | |
2421 | return -EINVAL; | |
fc4099f1 | 2422 | return egress_ipv4_tun_info(dev, skb, info, sport, dport); |
239e944f JB |
2423 | } else { |
2424 | #if IS_ENABLED(CONFIG_IPV6) | |
2425 | struct dst_entry *ndst; | |
2426 | ||
2427 | if (!vxlan->vn6_sock) | |
2428 | return -EINVAL; | |
2429 | ndst = vxlan6_get_route(vxlan, skb, 0, | |
2430 | &info->key.u.ipv6.dst, | |
2431 | &info->key.u.ipv6.src); | |
2432 | if (IS_ERR(ndst)) | |
2433 | return PTR_ERR(ndst); | |
2434 | dst_release(ndst); | |
2435 | ||
2436 | info->key.tp_src = sport; | |
2437 | info->key.tp_dst = dport; | |
2438 | #else /* !CONFIG_IPV6 */ | |
2439 | return -EPFNOSUPPORT; | |
2440 | #endif | |
2441 | } | |
2442 | return 0; | |
fc4099f1 PS |
2443 | } |
2444 | ||
d342894c | 2445 | static const struct net_device_ops vxlan_netdev_ops = { |
2446 | .ndo_init = vxlan_init, | |
ebf4063e | 2447 | .ndo_uninit = vxlan_uninit, |
d342894c | 2448 | .ndo_open = vxlan_open, |
2449 | .ndo_stop = vxlan_stop, | |
2450 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2451 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2452 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2453 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2454 | .ndo_validate_addr = eth_validate_addr, |
2455 | .ndo_set_mac_address = eth_mac_addr, | |
2456 | .ndo_fdb_add = vxlan_fdb_add, | |
2457 | .ndo_fdb_del = vxlan_fdb_delete, | |
2458 | .ndo_fdb_dump = vxlan_fdb_dump, | |
fc4099f1 | 2459 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
d342894c | 2460 | }; |
2461 | ||
2462 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2463 | static struct device_type vxlan_type = { | |
2464 | .name = "vxlan", | |
2465 | }; | |
2466 | ||
53cf5275 | 2467 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2468 | * supply the listening VXLAN udp ports. Callers are expected |
2469 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2470 | */ |
2471 | void vxlan_get_rx_port(struct net_device *dev) | |
2472 | { | |
2473 | struct vxlan_sock *vs; | |
2474 | struct net *net = dev_net(dev); | |
2475 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2476 | sa_family_t sa_family; | |
35e42379 JG |
2477 | __be16 port; |
2478 | unsigned int i; | |
53cf5275 JG |
2479 | |
2480 | spin_lock(&vn->sock_lock); | |
2481 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2482 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2483 | port = inet_sk(vs->sock->sk)->inet_sport; | |
705cc62f | 2484 | sa_family = vxlan_get_sk_family(vs); |
53cf5275 JG |
2485 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, |
2486 | port); | |
2487 | } | |
2488 | } | |
2489 | spin_unlock(&vn->sock_lock); | |
2490 | } | |
2491 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2492 | ||
d342894c | 2493 | /* Initialize the device structure. */ |
2494 | static void vxlan_setup(struct net_device *dev) | |
2495 | { | |
2496 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2497 | unsigned int h; |
d342894c | 2498 | |
2499 | eth_hw_addr_random(dev); | |
2500 | ether_setup(dev); | |
2501 | ||
2502 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 2503 | dev->destructor = free_netdev; |
d342894c | 2504 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2505 | ||
d342894c | 2506 | dev->features |= NETIF_F_LLTX; |
d6727fe3 | 2507 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2508 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2509 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2510 | |
1eaa8178 PS |
2511 | dev->vlan_features = dev->features; |
2512 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2513 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2514 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2515 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
02875878 | 2516 | netif_keep_dst(dev); |
22dba393 | 2517 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
d342894c | 2518 | |
553675fb | 2519 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2520 | spin_lock_init(&vxlan->hash_lock); |
2521 | ||
2522 | init_timer_deferrable(&vxlan->age_timer); | |
2523 | vxlan->age_timer.function = vxlan_cleanup; | |
2524 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2525 | ||
0dfbdf41 | 2526 | vxlan->cfg.dst_port = htons(vxlan_port); |
05f47d69 | 2527 | |
d342894c | 2528 | vxlan->dev = dev; |
2529 | ||
58ce31cc TH |
2530 | gro_cells_init(&vxlan->gro_cells, dev); |
2531 | ||
d342894c | 2532 | for (h = 0; h < FDB_HASH_SIZE; ++h) |
2533 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2534 | } | |
2535 | ||
2536 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
2537 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2538 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2539 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2540 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2541 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2542 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2543 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2544 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
2545 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
2546 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2547 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2548 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2549 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2550 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2551 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2552 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
f8a9b1bc | 2553 | [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
823aa873 | 2554 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
2555 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
2556 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
2557 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
2558 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
2559 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 2560 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
0ace2ca8 | 2561 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
d342894c | 2562 | }; |
2563 | ||
2564 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2565 | { | |
2566 | if (tb[IFLA_ADDRESS]) { | |
2567 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2568 | pr_debug("invalid link address (not ethernet)\n"); | |
2569 | return -EINVAL; | |
2570 | } | |
2571 | ||
2572 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2573 | pr_debug("invalid all zero ethernet address\n"); | |
2574 | return -EADDRNOTAVAIL; | |
2575 | } | |
2576 | } | |
2577 | ||
2578 | if (!data) | |
2579 | return -EINVAL; | |
2580 | ||
2581 | if (data[IFLA_VXLAN_ID]) { | |
2582 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2583 | if (id >= VXLAN_VID_MASK) | |
2584 | return -ERANGE; | |
2585 | } | |
2586 | ||
05f47d69 | 2587 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2588 | const struct ifla_vxlan_port_range *p | |
2589 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2590 | ||
2591 | if (ntohs(p->high) < ntohs(p->low)) { | |
2592 | pr_debug("port range %u .. %u not valid\n", | |
2593 | ntohs(p->low), ntohs(p->high)); | |
2594 | return -EINVAL; | |
2595 | } | |
2596 | } | |
2597 | ||
d342894c | 2598 | return 0; |
2599 | } | |
2600 | ||
1b13c97f YB |
2601 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2602 | struct ethtool_drvinfo *drvinfo) | |
2603 | { | |
2604 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2605 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2606 | } | |
2607 | ||
2608 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2609 | .get_drvinfo = vxlan_get_drvinfo, | |
2610 | .get_link = ethtool_op_get_link, | |
2611 | }; | |
2612 | ||
553675fb | 2613 | static void vxlan_del_work(struct work_struct *work) |
2614 | { | |
2615 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
acbf74a7 | 2616 | udp_tunnel_sock_release(vs->sock); |
553675fb | 2617 | kfree_rcu(vs, rcu); |
2618 | } | |
2619 | ||
3ee64f39 TH |
2620 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2621 | __be16 port, u32 flags) | |
553675fb | 2622 | { |
e4c7ed41 | 2623 | struct socket *sock; |
3ee64f39 TH |
2624 | struct udp_port_cfg udp_conf; |
2625 | int err; | |
e4c7ed41 | 2626 | |
3ee64f39 | 2627 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2628 | |
3ee64f39 TH |
2629 | if (ipv6) { |
2630 | udp_conf.family = AF_INET6; | |
3ee64f39 | 2631 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 2632 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
a43a9ef6 | 2633 | udp_conf.ipv6_v6only = 1; |
3ee64f39 TH |
2634 | } else { |
2635 | udp_conf.family = AF_INET; | |
e4c7ed41 | 2636 | } |
e4c7ed41 | 2637 | |
3ee64f39 | 2638 | udp_conf.local_udp_port = port; |
553675fb | 2639 | |
3ee64f39 TH |
2640 | /* Open UDP socket */ |
2641 | err = udp_sock_create(net, &udp_conf, &sock); | |
2642 | if (err < 0) | |
2643 | return ERR_PTR(err); | |
e4c7ed41 | 2644 | |
39deb2c7 | 2645 | return sock; |
e4c7ed41 CW |
2646 | } |
2647 | ||
2648 | /* Create new listen socket if needed */ | |
b1be00a6 JB |
2649 | static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6, |
2650 | __be16 port, u32 flags) | |
e4c7ed41 CW |
2651 | { |
2652 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2653 | struct vxlan_sock *vs; | |
2654 | struct socket *sock; | |
e4c7ed41 | 2655 | unsigned int h; |
acbf74a7 | 2656 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 2657 | |
dc01e7d3 | 2658 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2659 | if (!vs) |
2660 | return ERR_PTR(-ENOMEM); | |
2661 | ||
2662 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2663 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2664 | ||
2665 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2666 | ||
3ee64f39 | 2667 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 2668 | if (IS_ERR(sock)) { |
56ef9c90 MRL |
2669 | pr_info("Cannot bind port %d, err=%ld\n", ntohs(port), |
2670 | PTR_ERR(sock)); | |
553675fb | 2671 | kfree(vs); |
e50fddc8 | 2672 | return ERR_CAST(sock); |
553675fb | 2673 | } |
e4c7ed41 CW |
2674 | |
2675 | vs->sock = sock; | |
9c2e24e1 | 2676 | atomic_set(&vs->refcnt, 1); |
af33c1ad | 2677 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 2678 | |
dc01e7d3 OG |
2679 | /* Initialize the vxlan udp offloads structure */ |
2680 | vs->udp_offloads.port = port; | |
2681 | vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive; | |
2682 | vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete; | |
2683 | ||
9c2e24e1 PS |
2684 | spin_lock(&vn->sock_lock); |
2685 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2686 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2687 | spin_unlock(&vn->sock_lock); |
553675fb | 2688 | |
2689 | /* Mark socket as an encapsulation socket. */ | |
acbf74a7 AZ |
2690 | tunnel_cfg.sk_user_data = vs; |
2691 | tunnel_cfg.encap_type = 1; | |
2692 | tunnel_cfg.encap_rcv = vxlan_udp_encap_recv; | |
2693 | tunnel_cfg.encap_destroy = NULL; | |
2694 | ||
2695 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 2696 | |
9c2e24e1 PS |
2697 | return vs; |
2698 | } | |
2699 | ||
b1be00a6 | 2700 | static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6) |
9c2e24e1 | 2701 | { |
205f356d JB |
2702 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
2703 | struct vxlan_sock *vs = NULL; | |
9c2e24e1 | 2704 | |
205f356d | 2705 | if (!vxlan->cfg.no_share) { |
56ef9c90 | 2706 | spin_lock(&vn->sock_lock); |
205f356d JB |
2707 | vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
2708 | vxlan->cfg.dst_port, vxlan->flags); | |
2709 | if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) { | |
56ef9c90 | 2710 | spin_unlock(&vn->sock_lock); |
205f356d | 2711 | return -EBUSY; |
56ef9c90 MRL |
2712 | } |
2713 | spin_unlock(&vn->sock_lock); | |
2714 | } | |
205f356d | 2715 | if (!vs) |
b1be00a6 JB |
2716 | vs = vxlan_socket_create(vxlan->net, ipv6, |
2717 | vxlan->cfg.dst_port, vxlan->flags); | |
205f356d JB |
2718 | if (IS_ERR(vs)) |
2719 | return PTR_ERR(vs); | |
b1be00a6 JB |
2720 | #if IS_ENABLED(CONFIG_IPV6) |
2721 | if (ipv6) | |
2722 | vxlan->vn6_sock = vs; | |
2723 | else | |
2724 | #endif | |
2725 | vxlan->vn4_sock = vs; | |
205f356d JB |
2726 | vxlan_vs_add_dev(vs, vxlan); |
2727 | return 0; | |
553675fb | 2728 | } |
2729 | ||
b1be00a6 JB |
2730 | static int vxlan_sock_add(struct vxlan_dev *vxlan) |
2731 | { | |
2732 | bool ipv6 = vxlan->flags & VXLAN_F_IPV6; | |
2733 | bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA; | |
2734 | int ret = 0; | |
2735 | ||
2736 | vxlan->vn4_sock = NULL; | |
2737 | #if IS_ENABLED(CONFIG_IPV6) | |
2738 | vxlan->vn6_sock = NULL; | |
2739 | if (ipv6 || metadata) | |
2740 | ret = __vxlan_sock_add(vxlan, true); | |
2741 | #endif | |
2742 | if (!ret && (!ipv6 || metadata)) | |
2743 | ret = __vxlan_sock_add(vxlan, false); | |
2744 | if (ret < 0) | |
2745 | vxlan_sock_release(vxlan); | |
2746 | return ret; | |
2747 | } | |
2748 | ||
0dfbdf41 TG |
2749 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
2750 | struct vxlan_config *conf) | |
d342894c | 2751 | { |
33564bbb | 2752 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
d342894c | 2753 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 2754 | struct vxlan_rdst *dst = &vxlan->default_dst; |
b1be00a6 | 2755 | unsigned short needed_headroom = ETH_HLEN; |
d342894c | 2756 | int err; |
e4c7ed41 | 2757 | bool use_ipv6 = false; |
0dfbdf41 | 2758 | __be16 default_port = vxlan->cfg.dst_port; |
d342894c | 2759 | |
33564bbb | 2760 | vxlan->net = src_net; |
f01ec1c0 | 2761 | |
0dfbdf41 | 2762 | dst->remote_vni = conf->vni; |
d342894c | 2763 | |
0dfbdf41 | 2764 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); |
d342894c | 2765 | |
0dfbdf41 TG |
2766 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2767 | if (!dst->remote_ip.sa.sa_family) | |
2768 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 | 2769 | |
0dfbdf41 | 2770 | if (dst->remote_ip.sa.sa_family == AF_INET6 || |
057ba29b JB |
2771 | vxlan->cfg.saddr.sa.sa_family == AF_INET6) { |
2772 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2773 | return -EPFNOSUPPORT; | |
e4c7ed41 | 2774 | use_ipv6 = true; |
b1be00a6 | 2775 | vxlan->flags |= VXLAN_F_IPV6; |
057ba29b | 2776 | } |
d342894c | 2777 | |
0dfbdf41 | 2778 | if (conf->remote_ifindex) { |
34e02aa1 | 2779 | struct net_device *lowerdev |
0dfbdf41 TG |
2780 | = __dev_get_by_index(src_net, conf->remote_ifindex); |
2781 | ||
2782 | dst->remote_ifindex = conf->remote_ifindex; | |
34e02aa1 | 2783 | |
2784 | if (!lowerdev) { | |
c7995c43 | 2785 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2786 | return -ENODEV; |
2787 | } | |
d342894c | 2788 | |
e4c7ed41 CW |
2789 | #if IS_ENABLED(CONFIG_IPV6) |
2790 | if (use_ipv6) { | |
2791 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2792 | if (idev && idev->cnf.disable_ipv6) { | |
2793 | pr_info("IPv6 is disabled via sysctl\n"); | |
2794 | return -EPERM; | |
2795 | } | |
e4c7ed41 CW |
2796 | } |
2797 | #endif | |
2798 | ||
0dfbdf41 | 2799 | if (!conf->mtu) |
e4c7ed41 | 2800 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 | 2801 | |
b1be00a6 | 2802 | needed_headroom = lowerdev->hard_header_len; |
9dc2ad10 | 2803 | } |
d342894c | 2804 | |
b1be00a6 JB |
2805 | if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) |
2806 | needed_headroom += VXLAN6_HEADROOM; | |
2807 | else | |
2808 | needed_headroom += VXLAN_HEADROOM; | |
2809 | dev->needed_headroom = needed_headroom; | |
2810 | ||
0dfbdf41 TG |
2811 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
2812 | if (!vxlan->cfg.dst_port) | |
2813 | vxlan->cfg.dst_port = default_port; | |
2814 | vxlan->flags |= conf->flags; | |
2815 | ||
2816 | if (!vxlan->cfg.age_interval) | |
2817 | vxlan->cfg.age_interval = FDB_AGE_DEFAULT; | |
2818 | ||
2819 | if (vxlan_find_vni(src_net, conf->vni, use_ipv6 ? AF_INET6 : AF_INET, | |
2820 | vxlan->cfg.dst_port, vxlan->flags)) | |
2821 | return -EEXIST; | |
2822 | ||
2823 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
2824 | ||
2825 | /* create an fdb entry for a valid default destination */ | |
2826 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2827 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2828 | &vxlan->default_dst.remote_ip, | |
2829 | NUD_REACHABLE|NUD_PERMANENT, | |
2830 | NLM_F_EXCL|NLM_F_CREATE, | |
2831 | vxlan->cfg.dst_port, | |
2832 | vxlan->default_dst.remote_vni, | |
2833 | vxlan->default_dst.remote_ifindex, | |
2834 | NTF_SELF); | |
2835 | if (err) | |
2836 | return err; | |
2837 | } | |
2838 | ||
2839 | err = register_netdevice(dev); | |
2840 | if (err) { | |
2841 | vxlan_fdb_delete_default(vxlan); | |
2842 | return err; | |
2843 | } | |
2844 | ||
2845 | list_add(&vxlan->next, &vn->vxlan_list); | |
2846 | ||
2847 | return 0; | |
2848 | } | |
2849 | ||
2850 | struct net_device *vxlan_dev_create(struct net *net, const char *name, | |
2851 | u8 name_assign_type, struct vxlan_config *conf) | |
2852 | { | |
2853 | struct nlattr *tb[IFLA_MAX+1]; | |
2854 | struct net_device *dev; | |
2855 | int err; | |
2856 | ||
2857 | memset(&tb, 0, sizeof(tb)); | |
2858 | ||
2859 | dev = rtnl_create_link(net, name, name_assign_type, | |
2860 | &vxlan_link_ops, tb); | |
2861 | if (IS_ERR(dev)) | |
2862 | return dev; | |
2863 | ||
2864 | err = vxlan_dev_configure(net, dev, conf); | |
2865 | if (err < 0) { | |
2866 | free_netdev(dev); | |
2867 | return ERR_PTR(err); | |
2868 | } | |
2869 | ||
2870 | return dev; | |
2871 | } | |
2872 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
2873 | ||
2874 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
2875 | struct nlattr *tb[], struct nlattr *data[]) | |
2876 | { | |
2877 | struct vxlan_config conf; | |
2878 | int err; | |
2879 | ||
0dfbdf41 | 2880 | memset(&conf, 0, sizeof(conf)); |
e277de5f JG |
2881 | |
2882 | if (data[IFLA_VXLAN_ID]) | |
2883 | conf.vni = nla_get_u32(data[IFLA_VXLAN_ID]); | |
0dfbdf41 TG |
2884 | |
2885 | if (data[IFLA_VXLAN_GROUP]) { | |
2886 | conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); | |
2887 | } else if (data[IFLA_VXLAN_GROUP6]) { | |
2888 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2889 | return -EPFNOSUPPORT; | |
2890 | ||
2891 | conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); | |
2892 | conf.remote_ip.sa.sa_family = AF_INET6; | |
2893 | } | |
2894 | ||
2895 | if (data[IFLA_VXLAN_LOCAL]) { | |
2896 | conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); | |
2897 | conf.saddr.sa.sa_family = AF_INET; | |
2898 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2899 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2900 | return -EPFNOSUPPORT; | |
2901 | ||
2902 | /* TODO: respect scope id */ | |
2903 | conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); | |
2904 | conf.saddr.sa.sa_family = AF_INET6; | |
2905 | } | |
2906 | ||
2907 | if (data[IFLA_VXLAN_LINK]) | |
2908 | conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); | |
2909 | ||
d342894c | 2910 | if (data[IFLA_VXLAN_TOS]) |
0dfbdf41 | 2911 | conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 2912 | |
afb97186 | 2913 | if (data[IFLA_VXLAN_TTL]) |
0dfbdf41 | 2914 | conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 2915 | |
d342894c | 2916 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
0dfbdf41 | 2917 | conf.flags |= VXLAN_F_LEARN; |
d342894c | 2918 | |
2919 | if (data[IFLA_VXLAN_AGEING]) | |
0dfbdf41 | 2920 | conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); |
d342894c | 2921 | |
e4f67add | 2922 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
0dfbdf41 | 2923 | conf.flags |= VXLAN_F_PROXY; |
e4f67add DS |
2924 | |
2925 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
0dfbdf41 | 2926 | conf.flags |= VXLAN_F_RSC; |
e4f67add DS |
2927 | |
2928 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
0dfbdf41 | 2929 | conf.flags |= VXLAN_F_L2MISS; |
e4f67add DS |
2930 | |
2931 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
0dfbdf41 | 2932 | conf.flags |= VXLAN_F_L3MISS; |
e4f67add | 2933 | |
d342894c | 2934 | if (data[IFLA_VXLAN_LIMIT]) |
0dfbdf41 | 2935 | conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); |
d342894c | 2936 | |
f8a9b1bc AS |
2937 | if (data[IFLA_VXLAN_COLLECT_METADATA] && |
2938 | nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA])) | |
2939 | conf.flags |= VXLAN_F_COLLECT_METADATA; | |
2940 | ||
05f47d69 | 2941 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2942 | const struct ifla_vxlan_port_range *p | |
2943 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
0dfbdf41 TG |
2944 | conf.port_min = ntohs(p->low); |
2945 | conf.port_max = ntohs(p->high); | |
05f47d69 | 2946 | } |
2947 | ||
823aa873 | 2948 | if (data[IFLA_VXLAN_PORT]) |
0dfbdf41 | 2949 | conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); |
823aa873 | 2950 | |
359a0ea9 | 2951 | if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) |
0dfbdf41 | 2952 | conf.flags |= VXLAN_F_UDP_CSUM; |
359a0ea9 TH |
2953 | |
2954 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && | |
2955 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
0dfbdf41 | 2956 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; |
359a0ea9 TH |
2957 | |
2958 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && | |
2959 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
0dfbdf41 | 2960 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; |
359a0ea9 | 2961 | |
dfd8645e TH |
2962 | if (data[IFLA_VXLAN_REMCSUM_TX] && |
2963 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
0dfbdf41 | 2964 | conf.flags |= VXLAN_F_REMCSUM_TX; |
dfd8645e TH |
2965 | |
2966 | if (data[IFLA_VXLAN_REMCSUM_RX] && | |
2967 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
0dfbdf41 | 2968 | conf.flags |= VXLAN_F_REMCSUM_RX; |
dfd8645e | 2969 | |
3511494c | 2970 | if (data[IFLA_VXLAN_GBP]) |
0dfbdf41 | 2971 | conf.flags |= VXLAN_F_GBP; |
3511494c | 2972 | |
0ace2ca8 | 2973 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) |
0dfbdf41 | 2974 | conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL; |
0ace2ca8 | 2975 | |
0dfbdf41 TG |
2976 | err = vxlan_dev_configure(src_net, dev, &conf); |
2977 | switch (err) { | |
2978 | case -ENODEV: | |
2979 | pr_info("ifindex %d does not exist\n", conf.remote_ifindex); | |
2980 | break; | |
1b13c97f | 2981 | |
0dfbdf41 TG |
2982 | case -EPERM: |
2983 | pr_info("IPv6 is disabled via sysctl\n"); | |
2984 | break; | |
d342894c | 2985 | |
0dfbdf41 TG |
2986 | case -EEXIST: |
2987 | pr_info("duplicate VNI %u\n", conf.vni); | |
2988 | break; | |
afbd8bae MR |
2989 | } |
2990 | ||
0dfbdf41 | 2991 | return err; |
d342894c | 2992 | } |
2993 | ||
2994 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2995 | { | |
2996 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2997 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 2998 | |
fe5c3561 | 2999 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
3000 | if (!hlist_unhashed(&vxlan->hlist)) |
3001 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 3002 | spin_unlock(&vn->sock_lock); |
3003 | ||
58ce31cc | 3004 | gro_cells_destroy(&vxlan->gro_cells); |
553675fb | 3005 | list_del(&vxlan->next); |
d342894c | 3006 | unregister_netdevice_queue(dev, head); |
3007 | } | |
3008 | ||
3009 | static size_t vxlan_get_size(const struct net_device *dev) | |
3010 | { | |
3011 | ||
3012 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 3013 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 3014 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 3015 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 3016 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
3017 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
3018 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
3019 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
3020 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
3021 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
3022 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
da8b43c0 | 3023 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
d342894c | 3024 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
3025 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 3026 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
3027 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
3028 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
3029 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
3030 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
3031 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
3032 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 3033 | 0; |
3034 | } | |
3035 | ||
3036 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
3037 | { | |
3038 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 3039 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 3040 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
3041 | .low = htons(vxlan->cfg.port_min), |
3042 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 3043 | }; |
d342894c | 3044 | |
c7995c43 | 3045 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 3046 | goto nla_put_failure; |
3047 | ||
e4c7ed41 CW |
3048 | if (!vxlan_addr_any(&dst->remote_ip)) { |
3049 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
3050 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
3051 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
3052 | goto nla_put_failure; |
3053 | #if IS_ENABLED(CONFIG_IPV6) | |
3054 | } else { | |
930345ea JB |
3055 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
3056 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
3057 | goto nla_put_failure; |
3058 | #endif | |
3059 | } | |
3060 | } | |
d342894c | 3061 | |
c7995c43 | 3062 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 3063 | goto nla_put_failure; |
3064 | ||
0dfbdf41 TG |
3065 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
3066 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 3067 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 3068 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
3069 | goto nla_put_failure; |
3070 | #if IS_ENABLED(CONFIG_IPV6) | |
3071 | } else { | |
930345ea | 3072 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 3073 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
3074 | goto nla_put_failure; |
3075 | #endif | |
3076 | } | |
3077 | } | |
d342894c | 3078 | |
0dfbdf41 TG |
3079 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
3080 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || | |
e4f67add DS |
3081 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
3082 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
3083 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
3084 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
3085 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
3086 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
3087 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
3088 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
3089 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
da8b43c0 AS |
3090 | nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
3091 | !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) || | |
0dfbdf41 TG |
3092 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
3093 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
3094 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 TH |
3095 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
3096 | !!(vxlan->flags & VXLAN_F_UDP_CSUM)) || | |
3097 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, | |
3098 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
3099 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
dfd8645e TH |
3100 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
3101 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, | |
3102 | !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) || | |
3103 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, | |
3104 | !!(vxlan->flags & VXLAN_F_REMCSUM_RX))) | |
d342894c | 3105 | goto nla_put_failure; |
3106 | ||
05f47d69 | 3107 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
3108 | goto nla_put_failure; | |
3109 | ||
3511494c TG |
3110 | if (vxlan->flags & VXLAN_F_GBP && |
3111 | nla_put_flag(skb, IFLA_VXLAN_GBP)) | |
3112 | goto nla_put_failure; | |
3113 | ||
0ace2ca8 TH |
3114 | if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL && |
3115 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) | |
3116 | goto nla_put_failure; | |
3117 | ||
d342894c | 3118 | return 0; |
3119 | ||
3120 | nla_put_failure: | |
3121 | return -EMSGSIZE; | |
3122 | } | |
3123 | ||
1728d4fa ND |
3124 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
3125 | { | |
3126 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3127 | ||
3128 | return vxlan->net; | |
3129 | } | |
3130 | ||
d342894c | 3131 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
3132 | .kind = "vxlan", | |
3133 | .maxtype = IFLA_VXLAN_MAX, | |
3134 | .policy = vxlan_policy, | |
3135 | .priv_size = sizeof(struct vxlan_dev), | |
3136 | .setup = vxlan_setup, | |
3137 | .validate = vxlan_validate, | |
3138 | .newlink = vxlan_newlink, | |
3139 | .dellink = vxlan_dellink, | |
3140 | .get_size = vxlan_get_size, | |
3141 | .fill_info = vxlan_fill_info, | |
1728d4fa | 3142 | .get_link_net = vxlan_get_link_net, |
d342894c | 3143 | }; |
3144 | ||
acaf4e70 DB |
3145 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
3146 | struct net_device *dev) | |
3147 | { | |
3148 | struct vxlan_dev *vxlan, *next; | |
3149 | LIST_HEAD(list_kill); | |
3150 | ||
3151 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3152 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3153 | ||
3154 | /* In case we created vxlan device with carrier | |
3155 | * and we loose the carrier due to module unload | |
3156 | * we also need to remove vxlan device. In other | |
3157 | * cases, it's not necessary and remote_ifindex | |
3158 | * is 0 here, so no matches. | |
3159 | */ | |
3160 | if (dst->remote_ifindex == dev->ifindex) | |
3161 | vxlan_dellink(vxlan->dev, &list_kill); | |
3162 | } | |
3163 | ||
3164 | unregister_netdevice_many(&list_kill); | |
3165 | } | |
3166 | ||
3167 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
3168 | unsigned long event, void *ptr) | |
3169 | { | |
3170 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 3171 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 3172 | |
783c1463 | 3173 | if (event == NETDEV_UNREGISTER) |
acaf4e70 DB |
3174 | vxlan_handle_lowerdev_unregister(vn, dev); |
3175 | ||
3176 | return NOTIFY_DONE; | |
3177 | } | |
3178 | ||
3179 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
3180 | .notifier_call = vxlan_lowerdev_event, | |
3181 | }; | |
3182 | ||
d342894c | 3183 | static __net_init int vxlan_init_net(struct net *net) |
3184 | { | |
3185 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 3186 | unsigned int h; |
d342894c | 3187 | |
553675fb | 3188 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 3189 | spin_lock_init(&vn->sock_lock); |
d342894c | 3190 | |
553675fb | 3191 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
3192 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 3193 | |
3194 | return 0; | |
3195 | } | |
3196 | ||
f01ec1c0 ND |
3197 | static void __net_exit vxlan_exit_net(struct net *net) |
3198 | { | |
3199 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3200 | struct vxlan_dev *vxlan, *next; | |
3201 | struct net_device *dev, *aux; | |
3202 | LIST_HEAD(list); | |
3203 | ||
3204 | rtnl_lock(); | |
3205 | for_each_netdev_safe(net, dev, aux) | |
3206 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
3207 | unregister_netdevice_queue(dev, &list); | |
3208 | ||
3209 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3210 | /* If vxlan->dev is in the same netns, it has already been added | |
3211 | * to the list by the previous loop. | |
3212 | */ | |
58ce31cc TH |
3213 | if (!net_eq(dev_net(vxlan->dev), net)) { |
3214 | gro_cells_destroy(&vxlan->gro_cells); | |
13c3ed6a | 3215 | unregister_netdevice_queue(vxlan->dev, &list); |
58ce31cc | 3216 | } |
f01ec1c0 ND |
3217 | } |
3218 | ||
3219 | unregister_netdevice_many(&list); | |
3220 | rtnl_unlock(); | |
3221 | } | |
3222 | ||
d342894c | 3223 | static struct pernet_operations vxlan_net_ops = { |
3224 | .init = vxlan_init_net, | |
f01ec1c0 | 3225 | .exit = vxlan_exit_net, |
d342894c | 3226 | .id = &vxlan_net_id, |
3227 | .size = sizeof(struct vxlan_net), | |
3228 | }; | |
3229 | ||
3230 | static int __init vxlan_init_module(void) | |
3231 | { | |
3232 | int rc; | |
3233 | ||
758c57d1 SH |
3234 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
3235 | if (!vxlan_wq) | |
3236 | return -ENOMEM; | |
3237 | ||
d342894c | 3238 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
3239 | ||
783c1463 | 3240 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 3241 | if (rc) |
3242 | goto out1; | |
3243 | ||
acaf4e70 | 3244 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 3245 | if (rc) |
3246 | goto out2; | |
3247 | ||
acaf4e70 DB |
3248 | rc = rtnl_link_register(&vxlan_link_ops); |
3249 | if (rc) | |
3250 | goto out3; | |
d342894c | 3251 | |
acaf4e70 DB |
3252 | return 0; |
3253 | out3: | |
3254 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 3255 | out2: |
783c1463 | 3256 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 3257 | out1: |
758c57d1 | 3258 | destroy_workqueue(vxlan_wq); |
d342894c | 3259 | return rc; |
3260 | } | |
7332a13b | 3261 | late_initcall(vxlan_init_module); |
d342894c | 3262 | |
3263 | static void __exit vxlan_cleanup_module(void) | |
3264 | { | |
b7153984 | 3265 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 3266 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 3267 | destroy_workqueue(vxlan_wq); |
783c1463 DB |
3268 | unregister_pernet_subsys(&vxlan_net_ops); |
3269 | /* rcu_barrier() is called by netns */ | |
d342894c | 3270 | } |
3271 | module_exit(vxlan_cleanup_module); | |
3272 | ||
3273 | MODULE_LICENSE("GPL"); | |
3274 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 3275 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 3276 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 3277 | MODULE_ALIAS_RTNL_LINK("vxlan"); |