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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> |
40d29af0 | 45 | |
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 | |
7256eac1 | 76 | static const u8 all_zeros_mac[ETH_ALEN + 2]; |
afbd8bae | 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 */ |
54bfd872 | 200 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni) |
553675fb | 201 | { |
54bfd872 | 202 | return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)]; |
553675fb | 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 | ||
54bfd872 | 245 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, __be32 vni) |
d342894c | 246 | { |
247 | struct vxlan_dev *vxlan; | |
d342894c | 248 | |
b9167b2e JB |
249 | /* For flow based devices, map all packets to VNI 0 */ |
250 | if (vs->flags & VXLAN_F_COLLECT_METADATA) | |
251 | vni = 0; | |
252 | ||
54bfd872 JB |
253 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, vni), hlist) { |
254 | if (vxlan->default_dst.remote_vni == vni) | |
d342894c | 255 | return vxlan; |
256 | } | |
257 | ||
258 | return NULL; | |
259 | } | |
260 | ||
5cfccc5a | 261 | /* Look up VNI in a per net namespace table */ |
54bfd872 | 262 | static struct vxlan_dev *vxlan_find_vni(struct net *net, __be32 vni, |
ac5132d1 TG |
263 | sa_family_t family, __be16 port, |
264 | u32 flags) | |
5cfccc5a PS |
265 | { |
266 | struct vxlan_sock *vs; | |
267 | ||
ac5132d1 | 268 | vs = vxlan_find_sock(net, family, port, flags); |
5cfccc5a PS |
269 | if (!vs) |
270 | return NULL; | |
271 | ||
54bfd872 | 272 | return vxlan_vs_find_vni(vs, vni); |
5cfccc5a PS |
273 | } |
274 | ||
d342894c | 275 | /* Fill in neighbour message in skbuff. */ |
276 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
277 | const struct vxlan_fdb *fdb, |
278 | u32 portid, u32 seq, int type, unsigned int flags, | |
279 | const struct vxlan_rdst *rdst) | |
d342894c | 280 | { |
281 | unsigned long now = jiffies; | |
282 | struct nda_cacheinfo ci; | |
283 | struct nlmsghdr *nlh; | |
284 | struct ndmsg *ndm; | |
e4f67add | 285 | bool send_ip, send_eth; |
d342894c | 286 | |
287 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
288 | if (nlh == NULL) | |
289 | return -EMSGSIZE; | |
290 | ||
291 | ndm = nlmsg_data(nlh); | |
292 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
293 | |
294 | send_eth = send_ip = true; | |
295 | ||
296 | if (type == RTM_GETNEIGH) { | |
297 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 298 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
299 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
300 | } else | |
301 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 302 | ndm->ndm_state = fdb->state; |
303 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 304 | ndm->ndm_flags = fdb->flags; |
545469f7 | 305 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 306 | |
193523bf | 307 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 308 | nla_put_s32(skb, NDA_LINK_NETNSID, |
7a0877d4 | 309 | peernet2id_alloc(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
310 | goto nla_put_failure; |
311 | ||
e4f67add | 312 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 313 | goto nla_put_failure; |
314 | ||
e4c7ed41 | 315 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
316 | goto nla_put_failure; |
317 | ||
0dfbdf41 | 318 | if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && |
6681712d DS |
319 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
320 | goto nla_put_failure; | |
c7995c43 | 321 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
54bfd872 | 322 | nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni))) |
6681712d DS |
323 | goto nla_put_failure; |
324 | if (rdst->remote_ifindex && | |
325 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 326 | goto nla_put_failure; |
327 | ||
328 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
329 | ci.ndm_confirmed = 0; | |
330 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
331 | ci.ndm_refcnt = 0; | |
332 | ||
333 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
334 | goto nla_put_failure; | |
335 | ||
053c095a JB |
336 | nlmsg_end(skb, nlh); |
337 | return 0; | |
d342894c | 338 | |
339 | nla_put_failure: | |
340 | nlmsg_cancel(skb, nlh); | |
341 | return -EMSGSIZE; | |
342 | } | |
343 | ||
344 | static inline size_t vxlan_nlmsg_size(void) | |
345 | { | |
346 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
347 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 348 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 349 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
350 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
351 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 352 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 353 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
354 | } | |
355 | ||
9e4b93f9 ND |
356 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
357 | struct vxlan_rdst *rd, int type) | |
d342894c | 358 | { |
359 | struct net *net = dev_net(vxlan->dev); | |
360 | struct sk_buff *skb; | |
361 | int err = -ENOBUFS; | |
362 | ||
363 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
364 | if (skb == NULL) | |
365 | goto errout; | |
366 | ||
9e4b93f9 | 367 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 368 | if (err < 0) { |
369 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
370 | WARN_ON(err == -EMSGSIZE); | |
371 | kfree_skb(skb); | |
372 | goto errout; | |
373 | } | |
374 | ||
375 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
376 | return; | |
377 | errout: | |
378 | if (err < 0) | |
379 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
380 | } | |
381 | ||
e4c7ed41 | 382 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
383 | { |
384 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
385 | struct vxlan_fdb f = { |
386 | .state = NUD_STALE, | |
387 | }; | |
388 | struct vxlan_rdst remote = { | |
e4c7ed41 | 389 | .remote_ip = *ipa, /* goes to NDA_DST */ |
54bfd872 | 390 | .remote_vni = cpu_to_be32(VXLAN_N_VID), |
bb3fd687 | 391 | }; |
3e61aa8f | 392 | |
9e4b93f9 | 393 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
394 | } |
395 | ||
396 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
397 | { | |
bb3fd687 SH |
398 | struct vxlan_fdb f = { |
399 | .state = NUD_STALE, | |
400 | }; | |
9e4b93f9 | 401 | struct vxlan_rdst remote = { }; |
e4f67add | 402 | |
e4f67add DS |
403 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
404 | ||
9e4b93f9 | 405 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
406 | } |
407 | ||
d342894c | 408 | /* Hash Ethernet address */ |
409 | static u32 eth_hash(const unsigned char *addr) | |
410 | { | |
411 | u64 value = get_unaligned((u64 *)addr); | |
412 | ||
413 | /* only want 6 bytes */ | |
414 | #ifdef __BIG_ENDIAN | |
d342894c | 415 | value >>= 16; |
321fb991 | 416 | #else |
417 | value <<= 16; | |
d342894c | 418 | #endif |
419 | return hash_64(value, FDB_HASH_BITS); | |
420 | } | |
421 | ||
422 | /* Hash chain to use given mac address */ | |
423 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
424 | const u8 *mac) | |
425 | { | |
426 | return &vxlan->fdb_head[eth_hash(mac)]; | |
427 | } | |
428 | ||
429 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 430 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 431 | const u8 *mac) |
d342894c | 432 | { |
433 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
434 | struct vxlan_fdb *f; | |
d342894c | 435 | |
b67bfe0d | 436 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 437 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 438 | return f; |
439 | } | |
440 | ||
441 | return NULL; | |
442 | } | |
443 | ||
014be2c8 SS |
444 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
445 | const u8 *mac) | |
446 | { | |
447 | struct vxlan_fdb *f; | |
448 | ||
449 | f = __vxlan_find_mac(vxlan, mac); | |
450 | if (f) | |
451 | f->used = jiffies; | |
452 | ||
453 | return f; | |
454 | } | |
455 | ||
a5e7c10a MR |
456 | /* caller should hold vxlan->hash_lock */ |
457 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 458 | union vxlan_addr *ip, __be16 port, |
54bfd872 | 459 | __be32 vni, __u32 ifindex) |
6681712d | 460 | { |
3e61aa8f | 461 | struct vxlan_rdst *rd; |
6681712d | 462 | |
3e61aa8f | 463 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 464 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
465 | rd->remote_port == port && |
466 | rd->remote_vni == vni && | |
467 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 468 | return rd; |
6681712d | 469 | } |
3e61aa8f | 470 | |
a5e7c10a MR |
471 | return NULL; |
472 | } | |
473 | ||
906dc186 TR |
474 | /* Replace destination of unicast mac */ |
475 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
54bfd872 JB |
476 | union vxlan_addr *ip, __be16 port, __be32 vni, |
477 | __u32 ifindex) | |
906dc186 TR |
478 | { |
479 | struct vxlan_rdst *rd; | |
480 | ||
481 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
482 | if (rd) | |
483 | return 0; | |
484 | ||
485 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
486 | if (!rd) | |
487 | return 0; | |
0c1d70af PA |
488 | |
489 | dst_cache_reset(&rd->dst_cache); | |
e4c7ed41 | 490 | rd->remote_ip = *ip; |
906dc186 TR |
491 | rd->remote_port = port; |
492 | rd->remote_vni = vni; | |
493 | rd->remote_ifindex = ifindex; | |
494 | return 1; | |
495 | } | |
496 | ||
a5e7c10a MR |
497 | /* Add/update destinations for multicast */ |
498 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
54bfd872 | 499 | union vxlan_addr *ip, __be16 port, __be32 vni, |
9e4b93f9 | 500 | __u32 ifindex, struct vxlan_rdst **rdp) |
a5e7c10a MR |
501 | { |
502 | struct vxlan_rdst *rd; | |
503 | ||
504 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
505 | if (rd) | |
506 | return 0; | |
507 | ||
6681712d DS |
508 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
509 | if (rd == NULL) | |
510 | return -ENOBUFS; | |
0c1d70af PA |
511 | |
512 | if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) { | |
513 | kfree(rd); | |
514 | return -ENOBUFS; | |
515 | } | |
516 | ||
e4c7ed41 | 517 | rd->remote_ip = *ip; |
6681712d DS |
518 | rd->remote_port = port; |
519 | rd->remote_vni = vni; | |
520 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
521 | |
522 | list_add_tail_rcu(&rd->list, &f->remotes); | |
523 | ||
9e4b93f9 | 524 | *rdp = rd; |
6681712d DS |
525 | return 1; |
526 | } | |
527 | ||
dfd8645e TH |
528 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
529 | unsigned int off, | |
530 | struct vxlanhdr *vh, size_t hdrlen, | |
54bfd872 JB |
531 | __be32 vni_field, |
532 | struct gro_remcsum *grc, | |
0ace2ca8 | 533 | bool nopartial) |
dfd8645e | 534 | { |
b7fe10e5 | 535 | size_t start, offset; |
dfd8645e TH |
536 | |
537 | if (skb->remcsum_offload) | |
b7fe10e5 | 538 | return vh; |
dfd8645e TH |
539 | |
540 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
541 | return NULL; | |
542 | ||
54bfd872 JB |
543 | start = vxlan_rco_start(vni_field); |
544 | offset = start + vxlan_rco_offset(vni_field); | |
dfd8645e | 545 | |
b7fe10e5 TH |
546 | vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
547 | start, offset, grc, nopartial); | |
dfd8645e TH |
548 | |
549 | skb->remcsum_offload = 1; | |
550 | ||
551 | return vh; | |
552 | } | |
553 | ||
a2b12f3c TH |
554 | static struct sk_buff **vxlan_gro_receive(struct sk_buff **head, |
555 | struct sk_buff *skb, | |
556 | struct udp_offload *uoff) | |
dc01e7d3 OG |
557 | { |
558 | struct sk_buff *p, **pp = NULL; | |
559 | struct vxlanhdr *vh, *vh2; | |
9b174d88 | 560 | unsigned int hlen, off_vx; |
dc01e7d3 | 561 | int flush = 1; |
dfd8645e TH |
562 | struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock, |
563 | udp_offloads); | |
54bfd872 | 564 | __be32 flags; |
26c4f7da TH |
565 | struct gro_remcsum grc; |
566 | ||
567 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
568 | |
569 | off_vx = skb_gro_offset(skb); | |
570 | hlen = off_vx + sizeof(*vh); | |
571 | vh = skb_gro_header_fast(skb, off_vx); | |
572 | if (skb_gro_header_hard(skb, hlen)) { | |
573 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
574 | if (unlikely(!vh)) | |
575 | goto out; | |
576 | } | |
dc01e7d3 | 577 | |
dfd8645e TH |
578 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
579 | ||
54bfd872 | 580 | flags = vh->vx_flags; |
dfd8645e TH |
581 | |
582 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
583 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
54bfd872 | 584 | vh->vx_vni, &grc, |
0ace2ca8 TH |
585 | !!(vs->flags & |
586 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
587 | |
588 | if (!vh) | |
589 | goto out; | |
590 | } | |
591 | ||
b7fe10e5 TH |
592 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
593 | ||
dc01e7d3 OG |
594 | for (p = *head; p; p = p->next) { |
595 | if (!NAPI_GRO_CB(p)->same_flow) | |
596 | continue; | |
597 | ||
598 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
599 | if (vh->vx_flags != vh2->vx_flags || |
600 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
601 | NAPI_GRO_CB(p)->same_flow = 0; |
602 | continue; | |
603 | } | |
dc01e7d3 OG |
604 | } |
605 | ||
9b174d88 | 606 | pp = eth_gro_receive(head, skb); |
c194cf93 | 607 | flush = 0; |
dc01e7d3 | 608 | |
dc01e7d3 | 609 | out: |
26c4f7da | 610 | skb_gro_remcsum_cleanup(skb, &grc); |
dc01e7d3 OG |
611 | NAPI_GRO_CB(skb)->flush |= flush; |
612 | ||
613 | return pp; | |
614 | } | |
615 | ||
a2b12f3c TH |
616 | static int vxlan_gro_complete(struct sk_buff *skb, int nhoff, |
617 | struct udp_offload *uoff) | |
dc01e7d3 | 618 | { |
cfdf1e1b JG |
619 | udp_tunnel_gro_complete(skb, nhoff); |
620 | ||
9b174d88 | 621 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
622 | } |
623 | ||
53cf5275 | 624 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 625 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
626 | { |
627 | struct net_device *dev; | |
dc01e7d3 | 628 | struct sock *sk = vs->sock->sk; |
53cf5275 | 629 | struct net *net = sock_net(sk); |
705cc62f | 630 | sa_family_t sa_family = vxlan_get_sk_family(vs); |
35e42379 | 631 | __be16 port = inet_sk(sk)->inet_sport; |
dc01e7d3 OG |
632 | int err; |
633 | ||
634 | if (sa_family == AF_INET) { | |
787d7ac3 | 635 | err = udp_add_offload(net, &vs->udp_offloads); |
dc01e7d3 OG |
636 | if (err) |
637 | pr_warn("vxlan: udp_add_offload failed with status %d\n", err); | |
638 | } | |
53cf5275 JG |
639 | |
640 | rcu_read_lock(); | |
641 | for_each_netdev_rcu(net, dev) { | |
642 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
643 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
644 | port); | |
645 | } | |
646 | rcu_read_unlock(); | |
647 | } | |
648 | ||
649 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 650 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
651 | { |
652 | struct net_device *dev; | |
dc01e7d3 | 653 | struct sock *sk = vs->sock->sk; |
53cf5275 | 654 | struct net *net = sock_net(sk); |
705cc62f | 655 | sa_family_t sa_family = vxlan_get_sk_family(vs); |
35e42379 | 656 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
657 | |
658 | rcu_read_lock(); | |
659 | for_each_netdev_rcu(net, dev) { | |
660 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
661 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
662 | port); | |
663 | } | |
664 | rcu_read_unlock(); | |
dc01e7d3 OG |
665 | |
666 | if (sa_family == AF_INET) | |
667 | udp_del_offload(&vs->udp_offloads); | |
53cf5275 JG |
668 | } |
669 | ||
d342894c | 670 | /* Add new entry to forwarding table -- assumes lock held */ |
671 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 672 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 673 | __u16 state, __u16 flags, |
54bfd872 | 674 | __be16 port, __be32 vni, __u32 ifindex, |
ae884082 | 675 | __u8 ndm_flags) |
d342894c | 676 | { |
9e4b93f9 | 677 | struct vxlan_rdst *rd = NULL; |
d342894c | 678 | struct vxlan_fdb *f; |
679 | int notify = 0; | |
680 | ||
014be2c8 | 681 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 682 | if (f) { |
683 | if (flags & NLM_F_EXCL) { | |
684 | netdev_dbg(vxlan->dev, | |
685 | "lost race to create %pM\n", mac); | |
686 | return -EEXIST; | |
687 | } | |
688 | if (f->state != state) { | |
689 | f->state = state; | |
690 | f->updated = jiffies; | |
691 | notify = 1; | |
692 | } | |
ae884082 DS |
693 | if (f->flags != ndm_flags) { |
694 | f->flags = ndm_flags; | |
695 | f->updated = jiffies; | |
696 | notify = 1; | |
697 | } | |
906dc186 TR |
698 | if ((flags & NLM_F_REPLACE)) { |
699 | /* Only change unicasts */ | |
700 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
701 | is_zero_ether_addr(f->eth_addr))) { | |
60840429 | 702 | notify |= vxlan_fdb_replace(f, ip, port, vni, |
906dc186 | 703 | ifindex); |
906dc186 TR |
704 | } else |
705 | return -EOPNOTSUPP; | |
706 | } | |
6681712d | 707 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
708 | (is_multicast_ether_addr(f->eth_addr) || |
709 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
710 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
711 | &rd); | |
6681712d DS |
712 | |
713 | if (rc < 0) | |
714 | return rc; | |
715 | notify |= rc; | |
716 | } | |
d342894c | 717 | } else { |
718 | if (!(flags & NLM_F_CREATE)) | |
719 | return -ENOENT; | |
720 | ||
0dfbdf41 TG |
721 | if (vxlan->cfg.addrmax && |
722 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
d342894c | 723 | return -ENOSPC; |
724 | ||
906dc186 TR |
725 | /* Disallow replace to add a multicast entry */ |
726 | if ((flags & NLM_F_REPLACE) && | |
727 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
728 | return -EOPNOTSUPP; | |
729 | ||
e4c7ed41 | 730 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 731 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
732 | if (!f) | |
733 | return -ENOMEM; | |
734 | ||
735 | notify = 1; | |
d342894c | 736 | f->state = state; |
ae884082 | 737 | f->flags = ndm_flags; |
d342894c | 738 | f->updated = f->used = jiffies; |
3e61aa8f | 739 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 740 | memcpy(f->eth_addr, mac, ETH_ALEN); |
741 | ||
9e4b93f9 | 742 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 743 | |
d342894c | 744 | ++vxlan->addrcnt; |
745 | hlist_add_head_rcu(&f->hlist, | |
746 | vxlan_fdb_head(vxlan, mac)); | |
747 | } | |
748 | ||
9e4b93f9 ND |
749 | if (notify) { |
750 | if (rd == NULL) | |
751 | rd = first_remote_rtnl(f); | |
752 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
753 | } | |
d342894c | 754 | |
755 | return 0; | |
756 | } | |
757 | ||
6706c82e | 758 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
759 | { |
760 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 761 | struct vxlan_rdst *rd, *nd; |
6681712d | 762 | |
0c1d70af PA |
763 | list_for_each_entry_safe(rd, nd, &f->remotes, list) { |
764 | dst_cache_destroy(&rd->dst_cache); | |
6681712d | 765 | kfree(rd); |
0c1d70af | 766 | } |
6681712d DS |
767 | kfree(f); |
768 | } | |
769 | ||
d342894c | 770 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
771 | { | |
772 | netdev_dbg(vxlan->dev, | |
773 | "delete %pM\n", f->eth_addr); | |
774 | ||
775 | --vxlan->addrcnt; | |
9e4b93f9 | 776 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 777 | |
778 | hlist_del_rcu(&f->hlist); | |
6681712d | 779 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 780 | } |
781 | ||
f0b074be | 782 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
54bfd872 JB |
783 | union vxlan_addr *ip, __be16 *port, __be32 *vni, |
784 | u32 *ifindex) | |
d342894c | 785 | { |
6681712d | 786 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 787 | int err; |
d342894c | 788 | |
f0b074be | 789 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
790 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
791 | if (err) | |
792 | return err; | |
f0b074be | 793 | } else { |
e4c7ed41 CW |
794 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
795 | if (remote->sa.sa_family == AF_INET) { | |
796 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
797 | ip->sa.sa_family = AF_INET; | |
798 | #if IS_ENABLED(CONFIG_IPV6) | |
799 | } else { | |
800 | ip->sin6.sin6_addr = in6addr_any; | |
801 | ip->sa.sa_family = AF_INET6; | |
802 | #endif | |
803 | } | |
f0b074be | 804 | } |
d342894c | 805 | |
6681712d | 806 | if (tb[NDA_PORT]) { |
73cf3317 | 807 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 808 | return -EINVAL; |
f0b074be MR |
809 | *port = nla_get_be16(tb[NDA_PORT]); |
810 | } else { | |
0dfbdf41 | 811 | *port = vxlan->cfg.dst_port; |
f0b074be | 812 | } |
6681712d DS |
813 | |
814 | if (tb[NDA_VNI]) { | |
815 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
816 | return -EINVAL; | |
54bfd872 | 817 | *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); |
f0b074be MR |
818 | } else { |
819 | *vni = vxlan->default_dst.remote_vni; | |
820 | } | |
6681712d DS |
821 | |
822 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 823 | struct net_device *tdev; |
6681712d DS |
824 | |
825 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
826 | return -EINVAL; | |
f0b074be | 827 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 828 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 829 | if (!tdev) |
6681712d | 830 | return -EADDRNOTAVAIL; |
f0b074be MR |
831 | } else { |
832 | *ifindex = 0; | |
833 | } | |
834 | ||
835 | return 0; | |
836 | } | |
837 | ||
838 | /* Add static entry (via netlink) */ | |
839 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
840 | struct net_device *dev, | |
f6f6424b | 841 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
842 | { |
843 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
844 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 845 | union vxlan_addr ip; |
f0b074be | 846 | __be16 port; |
54bfd872 JB |
847 | __be32 vni; |
848 | u32 ifindex; | |
f0b074be MR |
849 | int err; |
850 | ||
851 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
852 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
853 | ndm->ndm_state); | |
854 | return -EINVAL; | |
855 | } | |
856 | ||
857 | if (tb[NDA_DST] == NULL) | |
858 | return -EINVAL; | |
859 | ||
860 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
861 | if (err) | |
862 | return err; | |
6681712d | 863 | |
5933a7bb MR |
864 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
865 | return -EAFNOSUPPORT; | |
866 | ||
d342894c | 867 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 868 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 869 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 870 | spin_unlock_bh(&vxlan->hash_lock); |
871 | ||
872 | return err; | |
873 | } | |
874 | ||
875 | /* Delete entry (via netlink) */ | |
1690be63 VY |
876 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
877 | struct net_device *dev, | |
f6f6424b | 878 | const unsigned char *addr, u16 vid) |
d342894c | 879 | { |
880 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
881 | struct vxlan_fdb *f; | |
bc7892ba | 882 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 883 | union vxlan_addr ip; |
bc7892ba | 884 | __be16 port; |
54bfd872 JB |
885 | __be32 vni; |
886 | u32 ifindex; | |
bc7892ba MR |
887 | int err; |
888 | ||
889 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
890 | if (err) | |
891 | return err; | |
892 | ||
893 | err = -ENOENT; | |
d342894c | 894 | |
895 | spin_lock_bh(&vxlan->hash_lock); | |
896 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
897 | if (!f) |
898 | goto out; | |
899 | ||
e4c7ed41 CW |
900 | if (!vxlan_addr_any(&ip)) { |
901 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
902 | if (!rd) |
903 | goto out; | |
904 | } | |
905 | ||
906 | err = 0; | |
907 | ||
908 | /* remove a destination if it's not the only one on the list, | |
909 | * otherwise destroy the fdb entry | |
910 | */ | |
911 | if (rd && !list_is_singular(&f->remotes)) { | |
912 | list_del_rcu(&rd->list); | |
9e4b93f9 | 913 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 914 | kfree_rcu(rd, rcu); |
bc7892ba | 915 | goto out; |
d342894c | 916 | } |
bc7892ba MR |
917 | |
918 | vxlan_fdb_destroy(vxlan, f); | |
919 | ||
920 | out: | |
d342894c | 921 | spin_unlock_bh(&vxlan->hash_lock); |
922 | ||
923 | return err; | |
924 | } | |
925 | ||
926 | /* Dump forwarding table */ | |
927 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 JHS |
928 | struct net_device *dev, |
929 | struct net_device *filter_dev, int idx) | |
d342894c | 930 | { |
931 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
932 | unsigned int h; | |
933 | ||
934 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
935 | struct vxlan_fdb *f; | |
d342894c | 936 | int err; |
937 | ||
b67bfe0d | 938 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 939 | struct vxlan_rdst *rd; |
6681712d | 940 | |
3e61aa8f | 941 | list_for_each_entry_rcu(rd, &f->remotes, list) { |
07a51cd3 AW |
942 | if (idx < cb->args[0]) |
943 | goto skip; | |
944 | ||
6681712d DS |
945 | err = vxlan_fdb_info(skb, vxlan, f, |
946 | NETLINK_CB(cb->skb).portid, | |
947 | cb->nlh->nlmsg_seq, | |
948 | RTM_NEWNEIGH, | |
949 | NLM_F_MULTI, rd); | |
472681d5 MM |
950 | if (err < 0) { |
951 | cb->args[1] = err; | |
3e61aa8f | 952 | goto out; |
472681d5 | 953 | } |
3e61aa8f | 954 | skip: |
07a51cd3 AW |
955 | ++idx; |
956 | } | |
d342894c | 957 | } |
958 | } | |
3e61aa8f | 959 | out: |
d342894c | 960 | return idx; |
961 | } | |
962 | ||
963 | /* Watch incoming packets to learn mapping between Ethernet address | |
964 | * and Tunnel endpoint. | |
c4b49512 | 965 | * Return true if packet is bogus and should be dropped. |
d342894c | 966 | */ |
26a41ae6 | 967 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 968 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 969 | { |
970 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
971 | struct vxlan_fdb *f; | |
d342894c | 972 | |
973 | f = vxlan_find_mac(vxlan, src_mac); | |
974 | if (likely(f)) { | |
5ca5461c | 975 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 976 | |
e4c7ed41 | 977 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 978 | return false; |
979 | ||
980 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 981 | if (f->state & NUD_NOARP) |
26a41ae6 | 982 | return true; |
d342894c | 983 | |
984 | if (net_ratelimit()) | |
985 | netdev_info(dev, | |
e4c7ed41 | 986 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 987 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 988 | |
e4c7ed41 | 989 | rdst->remote_ip = *src_ip; |
d342894c | 990 | f->updated = jiffies; |
9e4b93f9 | 991 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 992 | } else { |
993 | /* learned new entry */ | |
994 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 995 | |
996 | /* close off race between vxlan_flush and incoming packets */ | |
997 | if (netif_running(dev)) | |
998 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
999 | NUD_REACHABLE, | |
1000 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 1001 | vxlan->cfg.dst_port, |
3bf74b1a | 1002 | vxlan->default_dst.remote_vni, |
1003 | 0, NTF_SELF); | |
d342894c | 1004 | spin_unlock(&vxlan->hash_lock); |
1005 | } | |
26a41ae6 | 1006 | |
1007 | return false; | |
d342894c | 1008 | } |
1009 | ||
d342894c | 1010 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1011 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1012 | { |
553675fb | 1013 | struct vxlan_dev *vxlan; |
b1be00a6 | 1014 | unsigned short family = dev->default_dst.remote_ip.sa.sa_family; |
d342894c | 1015 | |
95ab0991 G |
1016 | /* The vxlan_sock is only used by dev, leaving group has |
1017 | * no effect on other vxlan devices. | |
1018 | */ | |
b1be00a6 JB |
1019 | if (family == AF_INET && dev->vn4_sock && |
1020 | atomic_read(&dev->vn4_sock->refcnt) == 1) | |
95ab0991 | 1021 | return false; |
b1be00a6 JB |
1022 | #if IS_ENABLED(CONFIG_IPV6) |
1023 | if (family == AF_INET6 && dev->vn6_sock && | |
1024 | atomic_read(&dev->vn6_sock->refcnt) == 1) | |
1025 | return false; | |
1026 | #endif | |
95ab0991 | 1027 | |
553675fb | 1028 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1029 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1030 | continue; |
d342894c | 1031 | |
b1be00a6 | 1032 | if (family == AF_INET && vxlan->vn4_sock != dev->vn4_sock) |
95ab0991 | 1033 | continue; |
b1be00a6 JB |
1034 | #if IS_ENABLED(CONFIG_IPV6) |
1035 | if (family == AF_INET6 && vxlan->vn6_sock != dev->vn6_sock) | |
1036 | continue; | |
1037 | #endif | |
95ab0991 G |
1038 | |
1039 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1040 | &dev->default_dst.remote_ip)) | |
1041 | continue; | |
1042 | ||
1043 | if (vxlan->default_dst.remote_ifindex != | |
1044 | dev->default_dst.remote_ifindex) | |
1045 | continue; | |
1046 | ||
1047 | return true; | |
553675fb | 1048 | } |
d342894c | 1049 | |
1050 | return false; | |
1051 | } | |
1052 | ||
b1be00a6 | 1053 | static void __vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 1054 | { |
b1be00a6 | 1055 | struct vxlan_net *vn; |
012a5729 | 1056 | |
b1be00a6 JB |
1057 | if (!vs) |
1058 | return; | |
7c47cedf SH |
1059 | if (!atomic_dec_and_test(&vs->refcnt)) |
1060 | return; | |
d342894c | 1061 | |
b1be00a6 | 1062 | vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
1c51a915 | 1063 | spin_lock(&vn->sock_lock); |
7c47cedf | 1064 | hlist_del_rcu(&vs->hlist); |
dc01e7d3 | 1065 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1066 | spin_unlock(&vn->sock_lock); |
1067 | ||
7c47cedf | 1068 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 1069 | } |
1070 | ||
b1be00a6 JB |
1071 | static void vxlan_sock_release(struct vxlan_dev *vxlan) |
1072 | { | |
1073 | __vxlan_sock_release(vxlan->vn4_sock); | |
1074 | #if IS_ENABLED(CONFIG_IPV6) | |
1075 | __vxlan_sock_release(vxlan->vn6_sock); | |
1076 | #endif | |
1077 | } | |
1078 | ||
56ef9c90 | 1079 | /* Update multicast group membership when first VNI on |
c4b49512 | 1080 | * multicast address is brought up |
7c47cedf | 1081 | */ |
56ef9c90 | 1082 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1083 | { |
b1be00a6 | 1084 | struct sock *sk; |
e4c7ed41 CW |
1085 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1086 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1087 | int ret = -EINVAL; |
d342894c | 1088 | |
e4c7ed41 CW |
1089 | if (ip->sa.sa_family == AF_INET) { |
1090 | struct ip_mreqn mreq = { | |
1091 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1092 | .imr_ifindex = ifindex, | |
1093 | }; | |
1094 | ||
b1be00a6 JB |
1095 | sk = vxlan->vn4_sock->sock->sk; |
1096 | lock_sock(sk); | |
56ef9c90 | 1097 | ret = ip_mc_join_group(sk, &mreq); |
b1be00a6 | 1098 | release_sock(sk); |
e4c7ed41 CW |
1099 | #if IS_ENABLED(CONFIG_IPV6) |
1100 | } else { | |
b1be00a6 JB |
1101 | sk = vxlan->vn6_sock->sock->sk; |
1102 | lock_sock(sk); | |
56ef9c90 MRL |
1103 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1104 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1105 | release_sock(sk); |
e4c7ed41 CW |
1106 | #endif |
1107 | } | |
3fc2de2f | 1108 | |
56ef9c90 | 1109 | return ret; |
3fc2de2f | 1110 | } |
1111 | ||
1112 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1113 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1114 | { |
b1be00a6 | 1115 | struct sock *sk; |
e4c7ed41 CW |
1116 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1117 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1118 | int ret = -EINVAL; |
3fc2de2f | 1119 | |
e4c7ed41 CW |
1120 | if (ip->sa.sa_family == AF_INET) { |
1121 | struct ip_mreqn mreq = { | |
1122 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1123 | .imr_ifindex = ifindex, | |
1124 | }; | |
1125 | ||
b1be00a6 JB |
1126 | sk = vxlan->vn4_sock->sock->sk; |
1127 | lock_sock(sk); | |
56ef9c90 | 1128 | ret = ip_mc_leave_group(sk, &mreq); |
b1be00a6 | 1129 | release_sock(sk); |
e4c7ed41 CW |
1130 | #if IS_ENABLED(CONFIG_IPV6) |
1131 | } else { | |
b1be00a6 JB |
1132 | sk = vxlan->vn6_sock->sock->sk; |
1133 | lock_sock(sk); | |
56ef9c90 MRL |
1134 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1135 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1136 | release_sock(sk); |
e4c7ed41 CW |
1137 | #endif |
1138 | } | |
d342894c | 1139 | |
56ef9c90 | 1140 | return ret; |
d342894c | 1141 | } |
1142 | ||
f14ecebb JB |
1143 | static bool vxlan_remcsum(struct vxlanhdr *unparsed, |
1144 | struct sk_buff *skb, u32 vxflags) | |
dfd8645e | 1145 | { |
7d34fa75 | 1146 | size_t start, offset; |
dfd8645e | 1147 | |
f14ecebb JB |
1148 | if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload) |
1149 | goto out; | |
b7fe10e5 | 1150 | |
f14ecebb JB |
1151 | start = vxlan_rco_start(unparsed->vx_vni); |
1152 | offset = start + vxlan_rco_offset(unparsed->vx_vni); | |
dfd8645e | 1153 | |
7d34fa75 | 1154 | if (!pskb_may_pull(skb, offset + sizeof(u16))) |
be5cfeab | 1155 | return false; |
dfd8645e | 1156 | |
be5cfeab JB |
1157 | skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset, |
1158 | !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
f14ecebb JB |
1159 | out: |
1160 | unparsed->vx_flags &= ~VXLAN_HF_RCO; | |
1161 | unparsed->vx_vni &= VXLAN_VNI_MASK; | |
be5cfeab | 1162 | return true; |
dfd8645e TH |
1163 | } |
1164 | ||
f14ecebb | 1165 | static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed, |
64f87d36 | 1166 | struct sk_buff *skb, u32 vxflags, |
10a5af23 | 1167 | struct vxlan_metadata *md) |
3288af08 | 1168 | { |
f14ecebb | 1169 | struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed; |
10a5af23 | 1170 | struct metadata_dst *tun_dst; |
f14ecebb JB |
1171 | |
1172 | if (!(unparsed->vx_flags & VXLAN_HF_GBP)) | |
1173 | goto out; | |
3288af08 | 1174 | |
3288af08 JB |
1175 | md->gbp = ntohs(gbp->policy_id); |
1176 | ||
10a5af23 | 1177 | tun_dst = (struct metadata_dst *)skb_dst(skb); |
810813c4 | 1178 | if (tun_dst) { |
3288af08 | 1179 | tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
810813c4 DM |
1180 | tun_dst->u.tun_info.options_len = sizeof(*md); |
1181 | } | |
3288af08 JB |
1182 | if (gbp->dont_learn) |
1183 | md->gbp |= VXLAN_GBP_DONT_LEARN; | |
1184 | ||
1185 | if (gbp->policy_applied) | |
1186 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; | |
f14ecebb | 1187 | |
64f87d36 JB |
1188 | /* In flow-based mode, GBP is carried in dst_metadata */ |
1189 | if (!(vxflags & VXLAN_F_COLLECT_METADATA)) | |
1190 | skb->mark = md->gbp; | |
f14ecebb JB |
1191 | out: |
1192 | unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS; | |
3288af08 JB |
1193 | } |
1194 | ||
1ab016e2 JB |
1195 | static bool vxlan_set_mac(struct vxlan_dev *vxlan, |
1196 | struct vxlan_sock *vs, | |
1197 | struct sk_buff *skb) | |
614732ea | 1198 | { |
614732ea | 1199 | union vxlan_addr saddr; |
614732ea | 1200 | |
614732ea | 1201 | skb_reset_mac_header(skb); |
614732ea TG |
1202 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
1203 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1204 | ||
1205 | /* Ignore packet loops (and multicast echo) */ | |
1206 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1ab016e2 | 1207 | return false; |
614732ea | 1208 | |
760c6805 | 1209 | /* Get address from the outer IP header */ |
ce212d0f | 1210 | if (vxlan_get_sk_family(vs) == AF_INET) { |
1ab016e2 | 1211 | saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; |
614732ea TG |
1212 | saddr.sa.sa_family = AF_INET; |
1213 | #if IS_ENABLED(CONFIG_IPV6) | |
1214 | } else { | |
1ab016e2 | 1215 | saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr; |
614732ea TG |
1216 | saddr.sa.sa_family = AF_INET6; |
1217 | #endif | |
1218 | } | |
1219 | ||
1ab016e2 JB |
1220 | if ((vxlan->flags & VXLAN_F_LEARN) && |
1221 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) | |
1222 | return false; | |
1223 | ||
1224 | return true; | |
1225 | } | |
1226 | ||
760c6805 JB |
1227 | static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph, |
1228 | struct sk_buff *skb) | |
1229 | { | |
1230 | int err = 0; | |
1231 | ||
1232 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1233 | err = IP_ECN_decapsulate(oiph, skb); | |
1234 | #if IS_ENABLED(CONFIG_IPV6) | |
1235 | else | |
1236 | err = IP6_ECN_decapsulate(oiph, skb); | |
1237 | #endif | |
1238 | ||
1239 | if (unlikely(err) && log_ecn_error) { | |
1240 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1241 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1242 | &((struct iphdr *)oiph)->saddr, | |
1243 | ((struct iphdr *)oiph)->tos); | |
1244 | else | |
1245 | net_info_ratelimited("non-ECT from %pI6\n", | |
1246 | &((struct ipv6hdr *)oiph)->saddr); | |
1247 | } | |
1248 | return err <= 1; | |
1249 | } | |
1250 | ||
d342894c | 1251 | /* Callback from net/ipv4/udp.c to receive packets */ |
f2d1968e | 1252 | static int vxlan_rcv(struct sock *sk, struct sk_buff *skb) |
d342894c | 1253 | { |
f2d1968e | 1254 | struct pcpu_sw_netstats *stats; |
c9e78efb | 1255 | struct vxlan_dev *vxlan; |
5cfccc5a | 1256 | struct vxlan_sock *vs; |
f14ecebb | 1257 | struct vxlanhdr unparsed; |
ee122c79 TG |
1258 | struct vxlan_metadata _md; |
1259 | struct vxlan_metadata *md = &_md; | |
f2d1968e | 1260 | void *oiph; |
d342894c | 1261 | |
d342894c | 1262 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1263 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
288b01c8 | 1264 | return 1; |
d342894c | 1265 | |
f14ecebb | 1266 | unparsed = *vxlan_hdr(skb); |
288b01c8 JB |
1267 | /* VNI flag always required to be set */ |
1268 | if (!(unparsed.vx_flags & VXLAN_HF_VNI)) { | |
1269 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1270 | ntohl(vxlan_hdr(skb)->vx_flags), | |
1271 | ntohl(vxlan_hdr(skb)->vx_vni)); | |
1272 | /* Return non vxlan pkt */ | |
1273 | return 1; | |
d342894c | 1274 | } |
288b01c8 JB |
1275 | unparsed.vx_flags &= ~VXLAN_HF_VNI; |
1276 | unparsed.vx_vni &= ~VXLAN_VNI_MASK; | |
d342894c | 1277 | |
559835ea | 1278 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1279 | if (!vs) |
d342894c | 1280 | goto drop; |
d342894c | 1281 | |
c9e78efb JB |
1282 | vxlan = vxlan_vs_find_vni(vs, vxlan_vni(vxlan_hdr(skb)->vx_vni)); |
1283 | if (!vxlan) | |
1284 | goto drop; | |
1285 | ||
7f290c94 JB |
1286 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB), |
1287 | !net_eq(vxlan->net, dev_net(vxlan->dev)))) | |
c9e78efb JB |
1288 | goto drop; |
1289 | ||
ee122c79 | 1290 | if (vxlan_collect_metadata(vs)) { |
07dabf20 | 1291 | __be32 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni); |
10a5af23 | 1292 | struct metadata_dst *tun_dst; |
07dabf20 | 1293 | |
c29a70d2 | 1294 | tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
07dabf20 | 1295 | vxlan_vni_to_tun_id(vni), sizeof(*md)); |
c29a70d2 | 1296 | |
ee122c79 TG |
1297 | if (!tun_dst) |
1298 | goto drop; | |
1299 | ||
0f1b7354 | 1300 | md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
10a5af23 JB |
1301 | |
1302 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
ee122c79 TG |
1303 | } else { |
1304 | memset(md, 0, sizeof(*md)); | |
1305 | } | |
1306 | ||
3511494c TG |
1307 | /* For backwards compatibility, only allow reserved fields to be |
1308 | * used by VXLAN extensions if explicitly requested. | |
1309 | */ | |
f14ecebb JB |
1310 | if (vs->flags & VXLAN_F_REMCSUM_RX) |
1311 | if (!vxlan_remcsum(&unparsed, skb, vs->flags)) | |
1312 | goto drop; | |
1313 | if (vs->flags & VXLAN_F_GBP) | |
10a5af23 | 1314 | vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md); |
3511494c | 1315 | |
f14ecebb | 1316 | if (unparsed.vx_flags || unparsed.vx_vni) { |
3bf39475 TH |
1317 | /* If there are any unprocessed flags remaining treat |
1318 | * this as a malformed packet. This behavior diverges from | |
1319 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1320 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1321 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1322 | * is more robust and provides a little more security in |
1323 | * adding extensions to VXLAN. | |
1324 | */ | |
288b01c8 | 1325 | goto drop; |
3bf39475 TH |
1326 | } |
1327 | ||
f2d1968e JB |
1328 | if (!vxlan_set_mac(vxlan, vs, skb)) |
1329 | goto drop; | |
1330 | ||
f2d1968e JB |
1331 | oiph = skb_network_header(skb); |
1332 | skb_reset_network_header(skb); | |
1333 | ||
1334 | if (!vxlan_ecn_decapsulate(vs, oiph, skb)) { | |
1335 | ++vxlan->dev->stats.rx_frame_errors; | |
1336 | ++vxlan->dev->stats.rx_errors; | |
1337 | goto drop; | |
1338 | } | |
1339 | ||
1340 | stats = this_cpu_ptr(vxlan->dev->tstats); | |
1341 | u64_stats_update_begin(&stats->syncp); | |
1342 | stats->rx_packets++; | |
1343 | stats->rx_bytes += skb->len; | |
1344 | u64_stats_update_end(&stats->syncp); | |
1345 | ||
1346 | gro_cells_receive(&vxlan->gro_cells, skb); | |
5cfccc5a PS |
1347 | return 0; |
1348 | ||
1349 | drop: | |
288b01c8 JB |
1350 | /* Consume bad packet */ |
1351 | kfree_skb(skb); | |
1352 | return 0; | |
5cfccc5a PS |
1353 | } |
1354 | ||
e4f67add DS |
1355 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1356 | { | |
1357 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1358 | struct arphdr *parp; | |
1359 | u8 *arpptr, *sha; | |
1360 | __be32 sip, tip; | |
1361 | struct neighbour *n; | |
1362 | ||
1363 | if (dev->flags & IFF_NOARP) | |
1364 | goto out; | |
1365 | ||
1366 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1367 | dev->stats.tx_dropped++; | |
1368 | goto out; | |
1369 | } | |
1370 | parp = arp_hdr(skb); | |
1371 | ||
1372 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1373 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1374 | parp->ar_pro != htons(ETH_P_IP) || | |
1375 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1376 | parp->ar_hln != dev->addr_len || | |
1377 | parp->ar_pln != 4) | |
1378 | goto out; | |
1379 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1380 | sha = arpptr; | |
1381 | arpptr += dev->addr_len; /* sha */ | |
1382 | memcpy(&sip, arpptr, sizeof(sip)); | |
1383 | arpptr += sizeof(sip); | |
1384 | arpptr += dev->addr_len; /* tha */ | |
1385 | memcpy(&tip, arpptr, sizeof(tip)); | |
1386 | ||
1387 | if (ipv4_is_loopback(tip) || | |
1388 | ipv4_is_multicast(tip)) | |
1389 | goto out; | |
1390 | ||
1391 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1392 | ||
1393 | if (n) { | |
e4f67add DS |
1394 | struct vxlan_fdb *f; |
1395 | struct sk_buff *reply; | |
1396 | ||
1397 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1398 | neigh_release(n); | |
1399 | goto out; | |
1400 | } | |
1401 | ||
1402 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1403 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1404 | /* bridge-local neighbor */ |
1405 | neigh_release(n); | |
1406 | goto out; | |
1407 | } | |
1408 | ||
1409 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1410 | n->ha, sha); | |
1411 | ||
1412 | neigh_release(n); | |
1413 | ||
7346135d DS |
1414 | if (reply == NULL) |
1415 | goto out; | |
1416 | ||
e4f67add DS |
1417 | skb_reset_mac_header(reply); |
1418 | __skb_pull(reply, skb_network_offset(reply)); | |
1419 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1420 | reply->pkt_type = PACKET_HOST; | |
1421 | ||
1422 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1423 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1424 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1425 | union vxlan_addr ipa = { | |
1426 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1427 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1428 | }; |
1429 | ||
1430 | vxlan_ip_miss(dev, &ipa); | |
1431 | } | |
e4f67add DS |
1432 | out: |
1433 | consume_skb(skb); | |
1434 | return NETDEV_TX_OK; | |
1435 | } | |
1436 | ||
f564f45c | 1437 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1438 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1439 | struct neighbour *n, bool isrouter) | |
1440 | { | |
1441 | struct net_device *dev = request->dev; | |
1442 | struct sk_buff *reply; | |
1443 | struct nd_msg *ns, *na; | |
1444 | struct ipv6hdr *pip6; | |
1445 | u8 *daddr; | |
1446 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1447 | int ns_olen; | |
1448 | int i, len; | |
1449 | ||
1450 | if (dev == NULL) | |
1451 | return NULL; | |
1452 | ||
1453 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1454 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1455 | reply = alloc_skb(len, GFP_ATOMIC); | |
1456 | if (reply == NULL) | |
1457 | return NULL; | |
1458 | ||
1459 | reply->protocol = htons(ETH_P_IPV6); | |
1460 | reply->dev = dev; | |
1461 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1462 | skb_push(reply, sizeof(struct ethhdr)); | |
6297b91c | 1463 | skb_reset_mac_header(reply); |
4b29dba9 DS |
1464 | |
1465 | ns = (struct nd_msg *)skb_transport_header(request); | |
1466 | ||
1467 | daddr = eth_hdr(request)->h_source; | |
1468 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1469 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1470 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1471 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1472 | break; | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | /* Ethernet header */ | |
1477 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1478 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1479 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1480 | reply->protocol = htons(ETH_P_IPV6); | |
1481 | ||
1482 | skb_pull(reply, sizeof(struct ethhdr)); | |
6297b91c | 1483 | skb_reset_network_header(reply); |
4b29dba9 DS |
1484 | skb_put(reply, sizeof(struct ipv6hdr)); |
1485 | ||
1486 | /* IPv6 header */ | |
1487 | ||
1488 | pip6 = ipv6_hdr(reply); | |
1489 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1490 | pip6->version = 6; | |
1491 | pip6->priority = ipv6_hdr(request)->priority; | |
1492 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1493 | pip6->hop_limit = 255; | |
1494 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1495 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1496 | ||
1497 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
6297b91c | 1498 | skb_reset_transport_header(reply); |
4b29dba9 DS |
1499 | |
1500 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1501 | ||
1502 | /* Neighbor Advertisement */ | |
1503 | memset(na, 0, sizeof(*na)+na_olen); | |
1504 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1505 | na->icmph.icmp6_router = isrouter; | |
1506 | na->icmph.icmp6_override = 1; | |
1507 | na->icmph.icmp6_solicited = 1; | |
1508 | na->target = ns->target; | |
1509 | ether_addr_copy(&na->opt[2], n->ha); | |
1510 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1511 | na->opt[1] = na_olen >> 3; | |
1512 | ||
1513 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1514 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1515 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1516 | ||
1517 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1518 | ||
1519 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1520 | ||
1521 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1522 | ||
1523 | return reply; | |
1524 | } | |
1525 | ||
f564f45c CW |
1526 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1527 | { | |
1528 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1529 | struct nd_msg *msg; |
f564f45c CW |
1530 | const struct ipv6hdr *iphdr; |
1531 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1532 | struct neighbour *n; |
1533 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1534 | |
1535 | in6_dev = __in6_dev_get(dev); | |
1536 | if (!in6_dev) | |
1537 | goto out; | |
1538 | ||
f564f45c CW |
1539 | iphdr = ipv6_hdr(skb); |
1540 | saddr = &iphdr->saddr; | |
1541 | daddr = &iphdr->daddr; | |
1542 | ||
f564f45c CW |
1543 | msg = (struct nd_msg *)skb_transport_header(skb); |
1544 | if (msg->icmph.icmp6_code != 0 || | |
1545 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1546 | goto out; | |
1547 | ||
4b29dba9 DS |
1548 | if (ipv6_addr_loopback(daddr) || |
1549 | ipv6_addr_is_multicast(&msg->target)) | |
1550 | goto out; | |
1551 | ||
1552 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1553 | |
1554 | if (n) { | |
1555 | struct vxlan_fdb *f; | |
4b29dba9 | 1556 | struct sk_buff *reply; |
f564f45c CW |
1557 | |
1558 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1559 | neigh_release(n); | |
1560 | goto out; | |
1561 | } | |
1562 | ||
1563 | f = vxlan_find_mac(vxlan, n->ha); | |
1564 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1565 | /* bridge-local neighbor */ | |
1566 | neigh_release(n); | |
1567 | goto out; | |
1568 | } | |
1569 | ||
4b29dba9 DS |
1570 | reply = vxlan_na_create(skb, n, |
1571 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1572 | ||
f564f45c | 1573 | neigh_release(n); |
4b29dba9 DS |
1574 | |
1575 | if (reply == NULL) | |
1576 | goto out; | |
1577 | ||
1578 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1579 | dev->stats.rx_dropped++; | |
1580 | ||
f564f45c | 1581 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1582 | union vxlan_addr ipa = { |
1583 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1584 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1585 | }; |
1586 | ||
f564f45c CW |
1587 | vxlan_ip_miss(dev, &ipa); |
1588 | } | |
1589 | ||
1590 | out: | |
1591 | consume_skb(skb); | |
1592 | return NETDEV_TX_OK; | |
1593 | } | |
1594 | #endif | |
1595 | ||
e4f67add DS |
1596 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1597 | { | |
1598 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1599 | struct neighbour *n; | |
e4f67add DS |
1600 | |
1601 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1602 | return false; | |
1603 | ||
1604 | n = NULL; | |
1605 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1606 | case ETH_P_IP: | |
e15a00aa CW |
1607 | { |
1608 | struct iphdr *pip; | |
1609 | ||
e4f67add DS |
1610 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1611 | return false; | |
1612 | pip = ip_hdr(skb); | |
1613 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1614 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1615 | union vxlan_addr ipa = { | |
1616 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 1617 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1618 | }; |
1619 | ||
1620 | vxlan_ip_miss(dev, &ipa); | |
1621 | return false; | |
1622 | } | |
1623 | ||
e4f67add | 1624 | break; |
e15a00aa CW |
1625 | } |
1626 | #if IS_ENABLED(CONFIG_IPV6) | |
1627 | case ETH_P_IPV6: | |
1628 | { | |
1629 | struct ipv6hdr *pip6; | |
1630 | ||
1631 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1632 | return false; | |
1633 | pip6 = ipv6_hdr(skb); | |
1634 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1635 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1636 | union vxlan_addr ipa = { | |
1637 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 1638 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
1639 | }; |
1640 | ||
1641 | vxlan_ip_miss(dev, &ipa); | |
1642 | return false; | |
1643 | } | |
1644 | ||
1645 | break; | |
1646 | } | |
1647 | #endif | |
e4f67add DS |
1648 | default: |
1649 | return false; | |
1650 | } | |
1651 | ||
1652 | if (n) { | |
1653 | bool diff; | |
1654 | ||
7367d0b5 | 1655 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1656 | if (diff) { |
1657 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1658 | dev->addr_len); | |
1659 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1660 | } | |
1661 | neigh_release(n); | |
1662 | return diff; | |
e4c7ed41 CW |
1663 | } |
1664 | ||
e4f67add DS |
1665 | return false; |
1666 | } | |
1667 | ||
af33c1ad | 1668 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
1669 | struct vxlan_metadata *md) |
1670 | { | |
1671 | struct vxlanhdr_gbp *gbp; | |
1672 | ||
db79a621 TG |
1673 | if (!md->gbp) |
1674 | return; | |
1675 | ||
3511494c | 1676 | gbp = (struct vxlanhdr_gbp *)vxh; |
54bfd872 | 1677 | vxh->vx_flags |= VXLAN_HF_GBP; |
3511494c TG |
1678 | |
1679 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
1680 | gbp->dont_learn = 1; | |
1681 | ||
1682 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
1683 | gbp->policy_applied = 1; | |
1684 | ||
1685 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
1686 | } | |
1687 | ||
f491e56d JB |
1688 | static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst, |
1689 | int iphdr_len, __be32 vni, | |
1690 | struct vxlan_metadata *md, u32 vxflags, | |
b4ed5cad | 1691 | bool udp_sum) |
e4c7ed41 | 1692 | { |
e4c7ed41 | 1693 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
1694 | int min_headroom; |
1695 | int err; | |
dfd8645e | 1696 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
dfd8645e | 1697 | |
af33c1ad | 1698 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1699 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1700 | int csum_start = skb_checksum_start_offset(skb); | |
1701 | ||
1702 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1703 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1704 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
b5708501 | 1705 | skb->csum_offset == offsetof(struct tcphdr, check))) |
dfd8645e | 1706 | type |= SKB_GSO_TUNNEL_REMCSUM; |
dfd8645e | 1707 | } |
e4c7ed41 | 1708 | |
e4c7ed41 | 1709 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
f491e56d | 1710 | + VXLAN_HLEN + iphdr_len |
df8a39de | 1711 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
649c5b8b PS |
1712 | |
1713 | /* Need space for new headers (invalidates iph ptr) */ | |
1714 | err = skb_cow_head(skb, min_headroom); | |
74f47278 PS |
1715 | if (unlikely(err)) { |
1716 | kfree_skb(skb); | |
649c5b8b | 1717 | return err; |
74f47278 | 1718 | } |
649c5b8b | 1719 | |
5968250c JP |
1720 | skb = vlan_hwaccel_push_inside(skb); |
1721 | if (WARN_ON(!skb)) | |
1722 | return -ENOMEM; | |
1eaa8178 | 1723 | |
6fa79666 | 1724 | skb = iptunnel_handle_offloads(skb, type); |
b736a623 JG |
1725 | if (IS_ERR(skb)) |
1726 | return PTR_ERR(skb); | |
1727 | ||
49560532 | 1728 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
54bfd872 JB |
1729 | vxh->vx_flags = VXLAN_HF_VNI; |
1730 | vxh->vx_vni = vxlan_vni_field(vni); | |
49560532 | 1731 | |
dfd8645e | 1732 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
54bfd872 | 1733 | unsigned int start; |
dfd8645e | 1734 | |
54bfd872 JB |
1735 | start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr); |
1736 | vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset); | |
1737 | vxh->vx_flags |= VXLAN_HF_RCO; | |
dfd8645e TH |
1738 | |
1739 | if (!skb_is_gso(skb)) { | |
1740 | skb->ip_summed = CHECKSUM_NONE; | |
1741 | skb->encapsulation = 0; | |
1742 | } | |
1743 | } | |
1744 | ||
af33c1ad TH |
1745 | if (vxflags & VXLAN_F_GBP) |
1746 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
3511494c | 1747 | |
996c9fd1 | 1748 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
039f5062 | 1749 | return 0; |
49560532 | 1750 | } |
49560532 | 1751 | |
1a8496ba JB |
1752 | static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, |
1753 | struct sk_buff *skb, int oif, u8 tos, | |
0c1d70af PA |
1754 | __be32 daddr, __be32 *saddr, |
1755 | struct dst_cache *dst_cache, | |
db3c6139 | 1756 | const struct ip_tunnel_info *info) |
1a8496ba | 1757 | { |
db3c6139 | 1758 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
1a8496ba JB |
1759 | struct rtable *rt = NULL; |
1760 | struct flowi4 fl4; | |
1761 | ||
db3c6139 DB |
1762 | if (tos && !info) |
1763 | use_cache = false; | |
1764 | if (use_cache) { | |
0c1d70af PA |
1765 | rt = dst_cache_get_ip4(dst_cache, saddr); |
1766 | if (rt) | |
1767 | return rt; | |
1768 | } | |
1769 | ||
1a8496ba JB |
1770 | memset(&fl4, 0, sizeof(fl4)); |
1771 | fl4.flowi4_oif = oif; | |
1772 | fl4.flowi4_tos = RT_TOS(tos); | |
1773 | fl4.flowi4_mark = skb->mark; | |
1774 | fl4.flowi4_proto = IPPROTO_UDP; | |
1775 | fl4.daddr = daddr; | |
1776 | fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr; | |
1777 | ||
1778 | rt = ip_route_output_key(vxlan->net, &fl4); | |
0c1d70af | 1779 | if (!IS_ERR(rt)) { |
1a8496ba | 1780 | *saddr = fl4.saddr; |
0c1d70af PA |
1781 | if (use_cache) |
1782 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); | |
1783 | } | |
1a8496ba JB |
1784 | return rt; |
1785 | } | |
1786 | ||
e5d4b29f JB |
1787 | #if IS_ENABLED(CONFIG_IPV6) |
1788 | static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan, | |
1400615d | 1789 | struct sk_buff *skb, int oif, u8 tos, |
e7f70af1 | 1790 | __be32 label, |
e5d4b29f | 1791 | const struct in6_addr *daddr, |
0c1d70af | 1792 | struct in6_addr *saddr, |
db3c6139 DB |
1793 | struct dst_cache *dst_cache, |
1794 | const struct ip_tunnel_info *info) | |
e5d4b29f | 1795 | { |
db3c6139 | 1796 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e5d4b29f JB |
1797 | struct dst_entry *ndst; |
1798 | struct flowi6 fl6; | |
1799 | int err; | |
1800 | ||
1400615d DB |
1801 | if (tos && !info) |
1802 | use_cache = false; | |
db3c6139 | 1803 | if (use_cache) { |
0c1d70af PA |
1804 | ndst = dst_cache_get_ip6(dst_cache, saddr); |
1805 | if (ndst) | |
1806 | return ndst; | |
1807 | } | |
1808 | ||
e5d4b29f JB |
1809 | memset(&fl6, 0, sizeof(fl6)); |
1810 | fl6.flowi6_oif = oif; | |
1811 | fl6.daddr = *daddr; | |
1812 | fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr; | |
eaa93bf4 | 1813 | fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label); |
e5d4b29f JB |
1814 | fl6.flowi6_mark = skb->mark; |
1815 | fl6.flowi6_proto = IPPROTO_UDP; | |
1816 | ||
1817 | err = ipv6_stub->ipv6_dst_lookup(vxlan->net, | |
1818 | vxlan->vn6_sock->sock->sk, | |
1819 | &ndst, &fl6); | |
1820 | if (err < 0) | |
1821 | return ERR_PTR(err); | |
1822 | ||
1823 | *saddr = fl6.saddr; | |
db3c6139 | 1824 | if (use_cache) |
0c1d70af | 1825 | dst_cache_set_ip6(dst_cache, ndst, saddr); |
e5d4b29f JB |
1826 | return ndst; |
1827 | } | |
1828 | #endif | |
1829 | ||
9dcc71e1 SS |
1830 | /* Bypass encapsulation if the destination is local */ |
1831 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1832 | struct vxlan_dev *dst_vxlan) | |
1833 | { | |
8f84985f | 1834 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1835 | union vxlan_addr loopback; |
1836 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
1837 | struct net_device *dev = skb->dev; |
1838 | int len = skb->len; | |
9dcc71e1 | 1839 | |
8f84985f LR |
1840 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1841 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1842 | skb->pkt_type = PACKET_HOST; |
1843 | skb->encapsulation = 0; | |
1844 | skb->dev = dst_vxlan->dev; | |
1845 | __skb_pull(skb, skb_network_offset(skb)); | |
1846 | ||
e4c7ed41 CW |
1847 | if (remote_ip->sa.sa_family == AF_INET) { |
1848 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1849 | loopback.sa.sa_family = AF_INET; | |
1850 | #if IS_ENABLED(CONFIG_IPV6) | |
1851 | } else { | |
1852 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1853 | loopback.sa.sa_family = AF_INET6; | |
1854 | #endif | |
1855 | } | |
1856 | ||
9dcc71e1 | 1857 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1858 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1859 | |
1860 | u64_stats_update_begin(&tx_stats->syncp); | |
1861 | tx_stats->tx_packets++; | |
ce6502a8 | 1862 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
1863 | u64_stats_update_end(&tx_stats->syncp); |
1864 | ||
1865 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1866 | u64_stats_update_begin(&rx_stats->syncp); | |
1867 | rx_stats->rx_packets++; | |
ce6502a8 | 1868 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
1869 | u64_stats_update_end(&rx_stats->syncp); |
1870 | } else { | |
ce6502a8 | 1871 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
1872 | } |
1873 | } | |
1874 | ||
4ad16930 SH |
1875 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1876 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1877 | { |
d71785ff | 1878 | struct dst_cache *dst_cache; |
3093fbe7 | 1879 | struct ip_tunnel_info *info; |
d342894c | 1880 | struct vxlan_dev *vxlan = netdev_priv(dev); |
b1be00a6 | 1881 | struct sock *sk; |
e4c7ed41 | 1882 | struct rtable *rt = NULL; |
d342894c | 1883 | const struct iphdr *old_iph; |
e4c7ed41 | 1884 | union vxlan_addr *dst; |
ee122c79 TG |
1885 | union vxlan_addr remote_ip; |
1886 | struct vxlan_metadata _md; | |
1887 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 1888 | __be16 src_port = 0, dst_port; |
e7f70af1 | 1889 | __be32 vni, label; |
d342894c | 1890 | __be16 df = 0; |
1891 | __u8 tos, ttl; | |
0e6fbc5b | 1892 | int err; |
ee122c79 | 1893 | u32 flags = vxlan->flags; |
b4ed5cad | 1894 | bool udp_sum = false; |
f491e56d | 1895 | bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev)); |
d342894c | 1896 | |
61adedf3 | 1897 | info = skb_tunnel_info(skb); |
3093fbe7 | 1898 | |
ee122c79 | 1899 | if (rdst) { |
0dfbdf41 | 1900 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
ee122c79 TG |
1901 | vni = rdst->remote_vni; |
1902 | dst = &rdst->remote_ip; | |
d71785ff | 1903 | dst_cache = &rdst->dst_cache; |
ee122c79 TG |
1904 | } else { |
1905 | if (!info) { | |
1906 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
1907 | dev->name); | |
1908 | goto drop; | |
1909 | } | |
0dfbdf41 | 1910 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
54bfd872 | 1911 | vni = vxlan_tun_id_to_vni(info->key.tun_id); |
b1be00a6 JB |
1912 | remote_ip.sa.sa_family = ip_tunnel_info_af(info); |
1913 | if (remote_ip.sa.sa_family == AF_INET) | |
a725e514 JB |
1914 | remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; |
1915 | else | |
1916 | remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; | |
ee122c79 | 1917 | dst = &remote_ip; |
d71785ff | 1918 | dst_cache = &info->dst_cache; |
ee122c79 | 1919 | } |
e4f67add | 1920 | |
e4c7ed41 | 1921 | if (vxlan_addr_any(dst)) { |
e4f67add | 1922 | if (did_rsc) { |
e4f67add | 1923 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1924 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1925 | return; |
e4f67add | 1926 | } |
ef59febe | 1927 | goto drop; |
e4f67add | 1928 | } |
ef59febe | 1929 | |
d342894c | 1930 | old_iph = ip_hdr(skb); |
1931 | ||
0dfbdf41 | 1932 | ttl = vxlan->cfg.ttl; |
e4c7ed41 | 1933 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1934 | ttl = 1; |
1935 | ||
0dfbdf41 | 1936 | tos = vxlan->cfg.tos; |
d342894c | 1937 | if (tos == 1) |
206aaafc | 1938 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1939 | |
e7f70af1 | 1940 | label = vxlan->cfg.label; |
0dfbdf41 TG |
1941 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
1942 | vxlan->cfg.port_max, true); | |
d342894c | 1943 | |
a725e514 | 1944 | if (info) { |
a725e514 JB |
1945 | ttl = info->key.ttl; |
1946 | tos = info->key.tos; | |
e7f70af1 | 1947 | label = info->key.label; |
b4ed5cad | 1948 | udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
a725e514 JB |
1949 | |
1950 | if (info->options_len) | |
4c222798 | 1951 | md = ip_tunnel_info_opts(info); |
a725e514 JB |
1952 | } else { |
1953 | md->gbp = skb->mark; | |
1954 | } | |
1955 | ||
e4c7ed41 | 1956 | if (dst->sa.sa_family == AF_INET) { |
1a8496ba JB |
1957 | __be32 saddr; |
1958 | ||
b1be00a6 JB |
1959 | if (!vxlan->vn4_sock) |
1960 | goto drop; | |
1961 | sk = vxlan->vn4_sock->sock->sk; | |
1962 | ||
1a8496ba JB |
1963 | rt = vxlan_get_route(vxlan, skb, |
1964 | rdst ? rdst->remote_ifindex : 0, tos, | |
0c1d70af | 1965 | dst->sin.sin_addr.s_addr, &saddr, |
d71785ff | 1966 | dst_cache, info); |
e4c7ed41 CW |
1967 | if (IS_ERR(rt)) { |
1968 | netdev_dbg(dev, "no route to %pI4\n", | |
1969 | &dst->sin.sin_addr.s_addr); | |
1970 | dev->stats.tx_carrier_errors++; | |
1971 | goto tx_error; | |
1972 | } | |
d342894c | 1973 | |
e4c7ed41 CW |
1974 | if (rt->dst.dev == dev) { |
1975 | netdev_dbg(dev, "circular route to %pI4\n", | |
1976 | &dst->sin.sin_addr.s_addr); | |
1977 | dev->stats.collisions++; | |
fffc15a5 | 1978 | goto rt_tx_error; |
e4c7ed41 CW |
1979 | } |
1980 | ||
1981 | /* Bypass encapsulation if the destination is local */ | |
1982 | if (rt->rt_flags & RTCF_LOCAL && | |
1983 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1984 | struct vxlan_dev *dst_vxlan; | |
1985 | ||
1986 | ip_rt_put(rt); | |
19ca9fc1 | 1987 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
1988 | dst->sa.sa_family, dst_port, |
1989 | vxlan->flags); | |
e4c7ed41 CW |
1990 | if (!dst_vxlan) |
1991 | goto tx_error; | |
1992 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1993 | return; | |
1994 | } | |
1995 | ||
6ceb31ca AD |
1996 | if (!info) |
1997 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX); | |
1998 | else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) | |
1999 | df = htons(IP_DF); | |
2000 | ||
e4c7ed41 CW |
2001 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
2002 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
f491e56d | 2003 | err = vxlan_build_skb(skb, &rt->dst, sizeof(struct iphdr), |
54bfd872 | 2004 | vni, md, flags, udp_sum); |
f491e56d JB |
2005 | if (err < 0) |
2006 | goto xmit_tx_error; | |
2007 | ||
2008 | udp_tunnel_xmit_skb(rt, sk, skb, saddr, | |
2009 | dst->sin.sin_addr.s_addr, tos, ttl, df, | |
2010 | src_port, dst_port, xnet, !udp_sum); | |
e4c7ed41 CW |
2011 | #if IS_ENABLED(CONFIG_IPV6) |
2012 | } else { | |
e4c7ed41 | 2013 | struct dst_entry *ndst; |
e5d4b29f | 2014 | struct in6_addr saddr; |
6f264e47 | 2015 | u32 rt6i_flags; |
e4c7ed41 | 2016 | |
b1be00a6 JB |
2017 | if (!vxlan->vn6_sock) |
2018 | goto drop; | |
2019 | sk = vxlan->vn6_sock->sock->sk; | |
2020 | ||
e5d4b29f | 2021 | ndst = vxlan6_get_route(vxlan, skb, |
1400615d | 2022 | rdst ? rdst->remote_ifindex : 0, tos, |
e7f70af1 | 2023 | label, &dst->sin6.sin6_addr, &saddr, |
db3c6139 | 2024 | dst_cache, info); |
e5d4b29f | 2025 | if (IS_ERR(ndst)) { |
e4c7ed41 CW |
2026 | netdev_dbg(dev, "no route to %pI6\n", |
2027 | &dst->sin6.sin6_addr); | |
2028 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 2029 | goto tx_error; |
e4c7ed41 | 2030 | } |
d342894c | 2031 | |
e4c7ed41 CW |
2032 | if (ndst->dev == dev) { |
2033 | netdev_dbg(dev, "circular route to %pI6\n", | |
2034 | &dst->sin6.sin6_addr); | |
2035 | dst_release(ndst); | |
2036 | dev->stats.collisions++; | |
2037 | goto tx_error; | |
2038 | } | |
0e6fbc5b | 2039 | |
e4c7ed41 | 2040 | /* Bypass encapsulation if the destination is local */ |
6f264e47 JB |
2041 | rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; |
2042 | if (rt6i_flags & RTF_LOCAL && | |
2043 | !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
e4c7ed41 CW |
2044 | struct vxlan_dev *dst_vxlan; |
2045 | ||
2046 | dst_release(ndst); | |
19ca9fc1 | 2047 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
2048 | dst->sa.sa_family, dst_port, |
2049 | vxlan->flags); | |
e4c7ed41 CW |
2050 | if (!dst_vxlan) |
2051 | goto tx_error; | |
2052 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
2053 | return; | |
2054 | } | |
49560532 | 2055 | |
b4ed5cad JB |
2056 | if (!info) |
2057 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); | |
35e2d115 | 2058 | |
1400615d | 2059 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
e4c7ed41 | 2060 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
f491e56d JB |
2061 | skb_scrub_packet(skb, xnet); |
2062 | err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr), | |
54bfd872 | 2063 | vni, md, flags, udp_sum); |
f491e56d JB |
2064 | if (err < 0) { |
2065 | dst_release(ndst); | |
2066 | return; | |
2067 | } | |
2068 | udp_tunnel6_xmit_skb(ndst, sk, skb, dev, | |
e7f70af1 DB |
2069 | &saddr, &dst->sin6.sin6_addr, tos, ttl, |
2070 | label, src_port, dst_port, !udp_sum); | |
e4c7ed41 CW |
2071 | #endif |
2072 | } | |
0e6fbc5b | 2073 | |
4ad16930 | 2074 | return; |
d342894c | 2075 | |
2076 | drop: | |
2077 | dev->stats.tx_dropped++; | |
2078 | goto tx_free; | |
2079 | ||
f491e56d JB |
2080 | xmit_tx_error: |
2081 | /* skb is already freed. */ | |
2082 | skb = NULL; | |
49560532 PS |
2083 | rt_tx_error: |
2084 | ip_rt_put(rt); | |
d342894c | 2085 | tx_error: |
2086 | dev->stats.tx_errors++; | |
2087 | tx_free: | |
2088 | dev_kfree_skb(skb); | |
d342894c | 2089 | } |
2090 | ||
6681712d DS |
2091 | /* Transmit local packets over Vxlan |
2092 | * | |
2093 | * Outer IP header inherits ECN and DF from inner header. | |
2094 | * Outer UDP destination is the VXLAN assigned port. | |
2095 | * source port is based on hash of flow | |
2096 | */ | |
2097 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2098 | { | |
2099 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3093fbe7 | 2100 | const struct ip_tunnel_info *info; |
6681712d DS |
2101 | struct ethhdr *eth; |
2102 | bool did_rsc = false; | |
8f646c92 | 2103 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 2104 | struct vxlan_fdb *f; |
6681712d | 2105 | |
61adedf3 | 2106 | info = skb_tunnel_info(skb); |
3093fbe7 | 2107 | |
6681712d DS |
2108 | skb_reset_mac_header(skb); |
2109 | eth = eth_hdr(skb); | |
2110 | ||
f564f45c CW |
2111 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
2112 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
2113 | return arp_reduce(dev, skb); | |
2114 | #if IS_ENABLED(CONFIG_IPV6) | |
2115 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
91269e39 LR |
2116 | pskb_may_pull(skb, sizeof(struct ipv6hdr) |
2117 | + sizeof(struct nd_msg)) && | |
f564f45c CW |
2118 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { |
2119 | struct nd_msg *msg; | |
2120 | ||
2121 | msg = (struct nd_msg *)skb_transport_header(skb); | |
2122 | if (msg->icmph.icmp6_code == 0 && | |
2123 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
2124 | return neigh_reduce(dev, skb); | |
2125 | } | |
7a9f526f | 2126 | eth = eth_hdr(skb); |
f564f45c CW |
2127 | #endif |
2128 | } | |
6681712d | 2129 | |
f468a729 JB |
2130 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA) { |
2131 | if (info && info->mode & IP_TUNNEL_INFO_TX) | |
2132 | vxlan_xmit_one(skb, dev, NULL, false); | |
2133 | else | |
2134 | kfree_skb(skb); | |
ee122c79 TG |
2135 | return NETDEV_TX_OK; |
2136 | } | |
2137 | ||
6681712d | 2138 | f = vxlan_find_mac(vxlan, eth->h_dest); |
ae884082 DS |
2139 | did_rsc = false; |
2140 | ||
2141 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
2142 | (ntohs(eth->h_proto) == ETH_P_IP || |
2143 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2144 | did_rsc = route_shortcircuit(dev, skb); |
2145 | if (did_rsc) | |
2146 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
2147 | } | |
2148 | ||
6681712d | 2149 | if (f == NULL) { |
afbd8bae MR |
2150 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
2151 | if (f == NULL) { | |
2152 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
2153 | !is_multicast_ether_addr(eth->h_dest)) | |
2154 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2155 | ||
2156 | dev->stats.tx_dropped++; | |
8f646c92 | 2157 | kfree_skb(skb); |
afbd8bae MR |
2158 | return NETDEV_TX_OK; |
2159 | } | |
2160 | } | |
6681712d | 2161 | |
afbd8bae MR |
2162 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2163 | struct sk_buff *skb1; | |
6681712d | 2164 | |
8f646c92 ED |
2165 | if (!fdst) { |
2166 | fdst = rdst; | |
2167 | continue; | |
2168 | } | |
afbd8bae MR |
2169 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2170 | if (skb1) | |
2171 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
2172 | } |
2173 | ||
8f646c92 ED |
2174 | if (fdst) |
2175 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
2176 | else | |
2177 | kfree_skb(skb); | |
4ad16930 | 2178 | return NETDEV_TX_OK; |
6681712d DS |
2179 | } |
2180 | ||
d342894c | 2181 | /* Walk the forwarding table and purge stale entries */ |
2182 | static void vxlan_cleanup(unsigned long arg) | |
2183 | { | |
2184 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2185 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2186 | unsigned int h; | |
2187 | ||
2188 | if (!netif_running(vxlan->dev)) | |
2189 | return; | |
2190 | ||
d342894c | 2191 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2192 | struct hlist_node *p, *n; | |
14e1d0fa SD |
2193 | |
2194 | spin_lock_bh(&vxlan->hash_lock); | |
d342894c | 2195 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2196 | struct vxlan_fdb *f | |
2197 | = container_of(p, struct vxlan_fdb, hlist); | |
2198 | unsigned long timeout; | |
2199 | ||
3c172868 | 2200 | if (f->state & NUD_PERMANENT) |
d342894c | 2201 | continue; |
2202 | ||
0dfbdf41 | 2203 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2204 | if (time_before_eq(timeout, jiffies)) { |
2205 | netdev_dbg(vxlan->dev, | |
2206 | "garbage collect %pM\n", | |
2207 | f->eth_addr); | |
2208 | f->state = NUD_STALE; | |
2209 | vxlan_fdb_destroy(vxlan, f); | |
2210 | } else if (time_before(timeout, next_timer)) | |
2211 | next_timer = timeout; | |
2212 | } | |
14e1d0fa | 2213 | spin_unlock_bh(&vxlan->hash_lock); |
d342894c | 2214 | } |
d342894c | 2215 | |
2216 | mod_timer(&vxlan->age_timer, next_timer); | |
2217 | } | |
2218 | ||
9c2e24e1 PS |
2219 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2220 | { | |
56ef9c90 | 2221 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
54bfd872 | 2222 | __be32 vni = vxlan->default_dst.remote_vni; |
9c2e24e1 | 2223 | |
56ef9c90 | 2224 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 2225 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); |
56ef9c90 | 2226 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
2227 | } |
2228 | ||
d342894c | 2229 | /* Setup stats when device is created */ |
2230 | static int vxlan_init(struct net_device *dev) | |
2231 | { | |
1c213bd2 | 2232 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2233 | if (!dev->tstats) |
d342894c | 2234 | return -ENOMEM; |
2235 | ||
2236 | return 0; | |
2237 | } | |
2238 | ||
ba609e9b | 2239 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2240 | { |
2241 | struct vxlan_fdb *f; | |
2242 | ||
2243 | spin_lock_bh(&vxlan->hash_lock); | |
2244 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2245 | if (f) | |
2246 | vxlan_fdb_destroy(vxlan, f); | |
2247 | spin_unlock_bh(&vxlan->hash_lock); | |
2248 | } | |
2249 | ||
ebf4063e SH |
2250 | static void vxlan_uninit(struct net_device *dev) |
2251 | { | |
2252 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 2253 | |
ba609e9b | 2254 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2255 | |
ebf4063e SH |
2256 | free_percpu(dev->tstats); |
2257 | } | |
2258 | ||
d342894c | 2259 | /* Start ageing timer and join group when device is brought up */ |
2260 | static int vxlan_open(struct net_device *dev) | |
2261 | { | |
2262 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
205f356d | 2263 | int ret; |
56ef9c90 | 2264 | |
205f356d JB |
2265 | ret = vxlan_sock_add(vxlan); |
2266 | if (ret < 0) | |
2267 | return ret; | |
d342894c | 2268 | |
79d4a94f | 2269 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 | 2270 | ret = vxlan_igmp_join(vxlan); |
bef0057b MRL |
2271 | if (ret == -EADDRINUSE) |
2272 | ret = 0; | |
56ef9c90 | 2273 | if (ret) { |
205f356d | 2274 | vxlan_sock_release(vxlan); |
56ef9c90 MRL |
2275 | return ret; |
2276 | } | |
d342894c | 2277 | } |
2278 | ||
0dfbdf41 | 2279 | if (vxlan->cfg.age_interval) |
d342894c | 2280 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
2281 | ||
56ef9c90 | 2282 | return ret; |
d342894c | 2283 | } |
2284 | ||
2285 | /* Purge the forwarding table */ | |
2286 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2287 | { | |
31fec5aa | 2288 | unsigned int h; |
d342894c | 2289 | |
2290 | spin_lock_bh(&vxlan->hash_lock); | |
2291 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2292 | struct hlist_node *p, *n; | |
2293 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2294 | struct vxlan_fdb *f | |
2295 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2296 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2297 | if (!is_zero_ether_addr(f->eth_addr)) | |
2298 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2299 | } |
2300 | } | |
2301 | spin_unlock_bh(&vxlan->hash_lock); | |
2302 | } | |
2303 | ||
2304 | /* Cleanup timer and forwarding table on shutdown */ | |
2305 | static int vxlan_stop(struct net_device *dev) | |
2306 | { | |
2307 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2308 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
56ef9c90 | 2309 | int ret = 0; |
d342894c | 2310 | |
24c0e683 | 2311 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 2312 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 2313 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 2314 | |
2315 | del_timer_sync(&vxlan->age_timer); | |
2316 | ||
2317 | vxlan_flush(vxlan); | |
205f356d | 2318 | vxlan_sock_release(vxlan); |
d342894c | 2319 | |
56ef9c90 | 2320 | return ret; |
d342894c | 2321 | } |
2322 | ||
d342894c | 2323 | /* Stub, nothing needs to be done. */ |
2324 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2325 | { | |
2326 | } | |
2327 | ||
72564b59 DW |
2328 | static int __vxlan_change_mtu(struct net_device *dev, |
2329 | struct net_device *lowerdev, | |
2330 | struct vxlan_rdst *dst, int new_mtu, bool strict) | |
345010b5 | 2331 | { |
72564b59 | 2332 | int max_mtu = IP_MAX_MTU; |
345010b5 | 2333 | |
72564b59 DW |
2334 | if (lowerdev) |
2335 | max_mtu = lowerdev->mtu; | |
345010b5 DB |
2336 | |
2337 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
72564b59 | 2338 | max_mtu -= VXLAN6_HEADROOM; |
345010b5 | 2339 | else |
72564b59 | 2340 | max_mtu -= VXLAN_HEADROOM; |
345010b5 | 2341 | |
72564b59 | 2342 | if (new_mtu < 68) |
345010b5 DB |
2343 | return -EINVAL; |
2344 | ||
72564b59 DW |
2345 | if (new_mtu > max_mtu) { |
2346 | if (strict) | |
2347 | return -EINVAL; | |
2348 | ||
2349 | new_mtu = max_mtu; | |
2350 | } | |
2351 | ||
345010b5 DB |
2352 | dev->mtu = new_mtu; |
2353 | return 0; | |
2354 | } | |
2355 | ||
72564b59 DW |
2356 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2357 | { | |
2358 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2359 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2360 | struct net_device *lowerdev = __dev_get_by_index(vxlan->net, | |
2361 | dst->remote_ifindex); | |
2362 | return __vxlan_change_mtu(dev, lowerdev, dst, new_mtu, true); | |
2363 | } | |
2364 | ||
fc4099f1 PS |
2365 | static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
2366 | { | |
2367 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2368 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
2369 | __be16 sport, dport; | |
2370 | ||
2371 | sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, | |
2372 | vxlan->cfg.port_max, true); | |
2373 | dport = info->key.tp_dst ? : vxlan->cfg.dst_port; | |
2374 | ||
239e944f | 2375 | if (ip_tunnel_info_af(info) == AF_INET) { |
1a8496ba JB |
2376 | struct rtable *rt; |
2377 | ||
239e944f JB |
2378 | if (!vxlan->vn4_sock) |
2379 | return -EINVAL; | |
1a8496ba JB |
2380 | rt = vxlan_get_route(vxlan, skb, 0, info->key.tos, |
2381 | info->key.u.ipv4.dst, | |
0c1d70af | 2382 | &info->key.u.ipv4.src, NULL, info); |
1a8496ba JB |
2383 | if (IS_ERR(rt)) |
2384 | return PTR_ERR(rt); | |
2385 | ip_rt_put(rt); | |
239e944f JB |
2386 | } else { |
2387 | #if IS_ENABLED(CONFIG_IPV6) | |
2388 | struct dst_entry *ndst; | |
2389 | ||
2390 | if (!vxlan->vn6_sock) | |
2391 | return -EINVAL; | |
1400615d | 2392 | ndst = vxlan6_get_route(vxlan, skb, 0, info->key.tos, |
e7f70af1 | 2393 | info->key.label, &info->key.u.ipv6.dst, |
db3c6139 | 2394 | &info->key.u.ipv6.src, NULL, info); |
239e944f JB |
2395 | if (IS_ERR(ndst)) |
2396 | return PTR_ERR(ndst); | |
2397 | dst_release(ndst); | |
239e944f JB |
2398 | #else /* !CONFIG_IPV6 */ |
2399 | return -EPFNOSUPPORT; | |
2400 | #endif | |
2401 | } | |
1a8496ba JB |
2402 | info->key.tp_src = sport; |
2403 | info->key.tp_dst = dport; | |
239e944f | 2404 | return 0; |
fc4099f1 PS |
2405 | } |
2406 | ||
0c867c9b | 2407 | static const struct net_device_ops vxlan_netdev_ether_ops = { |
d342894c | 2408 | .ndo_init = vxlan_init, |
ebf4063e | 2409 | .ndo_uninit = vxlan_uninit, |
d342894c | 2410 | .ndo_open = vxlan_open, |
2411 | .ndo_stop = vxlan_stop, | |
2412 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2413 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2414 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2415 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2416 | .ndo_validate_addr = eth_validate_addr, |
2417 | .ndo_set_mac_address = eth_mac_addr, | |
2418 | .ndo_fdb_add = vxlan_fdb_add, | |
2419 | .ndo_fdb_del = vxlan_fdb_delete, | |
2420 | .ndo_fdb_dump = vxlan_fdb_dump, | |
fc4099f1 | 2421 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
d342894c | 2422 | }; |
2423 | ||
2424 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2425 | static struct device_type vxlan_type = { | |
2426 | .name = "vxlan", | |
2427 | }; | |
2428 | ||
53cf5275 | 2429 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2430 | * supply the listening VXLAN udp ports. Callers are expected |
2431 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2432 | */ |
2433 | void vxlan_get_rx_port(struct net_device *dev) | |
2434 | { | |
2435 | struct vxlan_sock *vs; | |
2436 | struct net *net = dev_net(dev); | |
2437 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2438 | sa_family_t sa_family; | |
35e42379 JG |
2439 | __be16 port; |
2440 | unsigned int i; | |
53cf5275 JG |
2441 | |
2442 | spin_lock(&vn->sock_lock); | |
2443 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2444 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2445 | port = inet_sk(vs->sock->sk)->inet_sport; | |
705cc62f | 2446 | sa_family = vxlan_get_sk_family(vs); |
53cf5275 JG |
2447 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, |
2448 | port); | |
2449 | } | |
2450 | } | |
2451 | spin_unlock(&vn->sock_lock); | |
2452 | } | |
2453 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2454 | ||
d342894c | 2455 | /* Initialize the device structure. */ |
2456 | static void vxlan_setup(struct net_device *dev) | |
2457 | { | |
2458 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2459 | unsigned int h; |
d342894c | 2460 | |
ebf4063e | 2461 | dev->destructor = free_netdev; |
d342894c | 2462 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2463 | ||
d342894c | 2464 | dev->features |= NETIF_F_LLTX; |
d6727fe3 | 2465 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2466 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2467 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2468 | |
1eaa8178 PS |
2469 | dev->vlan_features = dev->features; |
2470 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2471 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2472 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2473 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
02875878 | 2474 | netif_keep_dst(dev); |
0c867c9b | 2475 | dev->priv_flags |= IFF_NO_QUEUE; |
d342894c | 2476 | |
553675fb | 2477 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2478 | spin_lock_init(&vxlan->hash_lock); |
2479 | ||
2480 | init_timer_deferrable(&vxlan->age_timer); | |
2481 | vxlan->age_timer.function = vxlan_cleanup; | |
2482 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2483 | ||
0dfbdf41 | 2484 | vxlan->cfg.dst_port = htons(vxlan_port); |
05f47d69 | 2485 | |
d342894c | 2486 | vxlan->dev = dev; |
2487 | ||
58ce31cc TH |
2488 | gro_cells_init(&vxlan->gro_cells, dev); |
2489 | ||
d342894c | 2490 | for (h = 0; h < FDB_HASH_SIZE; ++h) |
2491 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2492 | } | |
2493 | ||
0c867c9b JB |
2494 | static void vxlan_ether_setup(struct net_device *dev) |
2495 | { | |
2496 | eth_hw_addr_random(dev); | |
2497 | ether_setup(dev); | |
2498 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; | |
2499 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
2500 | dev->netdev_ops = &vxlan_netdev_ether_ops; | |
2501 | } | |
2502 | ||
d342894c | 2503 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { |
2504 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2505 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2506 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2507 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2508 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2509 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2510 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2511 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
e7f70af1 | 2512 | [IFLA_VXLAN_LABEL] = { .type = NLA_U32 }, |
d342894c | 2513 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, |
2514 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2515 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2516 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2517 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2518 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2519 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2520 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
f8a9b1bc | 2521 | [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
823aa873 | 2522 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
2523 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
2524 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
2525 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
2526 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
2527 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 2528 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
0ace2ca8 | 2529 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
d342894c | 2530 | }; |
2531 | ||
2532 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2533 | { | |
2534 | if (tb[IFLA_ADDRESS]) { | |
2535 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2536 | pr_debug("invalid link address (not ethernet)\n"); | |
2537 | return -EINVAL; | |
2538 | } | |
2539 | ||
2540 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2541 | pr_debug("invalid all zero ethernet address\n"); | |
2542 | return -EADDRNOTAVAIL; | |
2543 | } | |
2544 | } | |
2545 | ||
2546 | if (!data) | |
2547 | return -EINVAL; | |
2548 | ||
2549 | if (data[IFLA_VXLAN_ID]) { | |
2550 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2551 | if (id >= VXLAN_VID_MASK) | |
2552 | return -ERANGE; | |
2553 | } | |
2554 | ||
05f47d69 | 2555 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2556 | const struct ifla_vxlan_port_range *p | |
2557 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2558 | ||
2559 | if (ntohs(p->high) < ntohs(p->low)) { | |
2560 | pr_debug("port range %u .. %u not valid\n", | |
2561 | ntohs(p->low), ntohs(p->high)); | |
2562 | return -EINVAL; | |
2563 | } | |
2564 | } | |
2565 | ||
d342894c | 2566 | return 0; |
2567 | } | |
2568 | ||
1b13c97f YB |
2569 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2570 | struct ethtool_drvinfo *drvinfo) | |
2571 | { | |
2572 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2573 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2574 | } | |
2575 | ||
2576 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2577 | .get_drvinfo = vxlan_get_drvinfo, | |
2578 | .get_link = ethtool_op_get_link, | |
2579 | }; | |
2580 | ||
553675fb | 2581 | static void vxlan_del_work(struct work_struct *work) |
2582 | { | |
2583 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
acbf74a7 | 2584 | udp_tunnel_sock_release(vs->sock); |
553675fb | 2585 | kfree_rcu(vs, rcu); |
2586 | } | |
2587 | ||
3ee64f39 TH |
2588 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2589 | __be16 port, u32 flags) | |
553675fb | 2590 | { |
e4c7ed41 | 2591 | struct socket *sock; |
3ee64f39 TH |
2592 | struct udp_port_cfg udp_conf; |
2593 | int err; | |
e4c7ed41 | 2594 | |
3ee64f39 | 2595 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2596 | |
3ee64f39 TH |
2597 | if (ipv6) { |
2598 | udp_conf.family = AF_INET6; | |
3ee64f39 | 2599 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 2600 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
a43a9ef6 | 2601 | udp_conf.ipv6_v6only = 1; |
3ee64f39 TH |
2602 | } else { |
2603 | udp_conf.family = AF_INET; | |
e4c7ed41 | 2604 | } |
e4c7ed41 | 2605 | |
3ee64f39 | 2606 | udp_conf.local_udp_port = port; |
553675fb | 2607 | |
3ee64f39 TH |
2608 | /* Open UDP socket */ |
2609 | err = udp_sock_create(net, &udp_conf, &sock); | |
2610 | if (err < 0) | |
2611 | return ERR_PTR(err); | |
e4c7ed41 | 2612 | |
39deb2c7 | 2613 | return sock; |
e4c7ed41 CW |
2614 | } |
2615 | ||
2616 | /* Create new listen socket if needed */ | |
b1be00a6 JB |
2617 | static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6, |
2618 | __be16 port, u32 flags) | |
e4c7ed41 CW |
2619 | { |
2620 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2621 | struct vxlan_sock *vs; | |
2622 | struct socket *sock; | |
e4c7ed41 | 2623 | unsigned int h; |
acbf74a7 | 2624 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 2625 | |
dc01e7d3 | 2626 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2627 | if (!vs) |
2628 | return ERR_PTR(-ENOMEM); | |
2629 | ||
2630 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2631 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2632 | ||
2633 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2634 | ||
3ee64f39 | 2635 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 2636 | if (IS_ERR(sock)) { |
56ef9c90 MRL |
2637 | pr_info("Cannot bind port %d, err=%ld\n", ntohs(port), |
2638 | PTR_ERR(sock)); | |
553675fb | 2639 | kfree(vs); |
e50fddc8 | 2640 | return ERR_CAST(sock); |
553675fb | 2641 | } |
e4c7ed41 CW |
2642 | |
2643 | vs->sock = sock; | |
9c2e24e1 | 2644 | atomic_set(&vs->refcnt, 1); |
af33c1ad | 2645 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 2646 | |
dc01e7d3 OG |
2647 | /* Initialize the vxlan udp offloads structure */ |
2648 | vs->udp_offloads.port = port; | |
2649 | vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive; | |
2650 | vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete; | |
2651 | ||
9c2e24e1 PS |
2652 | spin_lock(&vn->sock_lock); |
2653 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2654 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2655 | spin_unlock(&vn->sock_lock); |
553675fb | 2656 | |
2657 | /* Mark socket as an encapsulation socket. */ | |
acbf74a7 AZ |
2658 | tunnel_cfg.sk_user_data = vs; |
2659 | tunnel_cfg.encap_type = 1; | |
f2d1968e | 2660 | tunnel_cfg.encap_rcv = vxlan_rcv; |
acbf74a7 AZ |
2661 | tunnel_cfg.encap_destroy = NULL; |
2662 | ||
2663 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 2664 | |
9c2e24e1 PS |
2665 | return vs; |
2666 | } | |
2667 | ||
b1be00a6 | 2668 | static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6) |
9c2e24e1 | 2669 | { |
205f356d JB |
2670 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
2671 | struct vxlan_sock *vs = NULL; | |
9c2e24e1 | 2672 | |
205f356d | 2673 | if (!vxlan->cfg.no_share) { |
56ef9c90 | 2674 | spin_lock(&vn->sock_lock); |
205f356d JB |
2675 | vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
2676 | vxlan->cfg.dst_port, vxlan->flags); | |
2677 | if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) { | |
56ef9c90 | 2678 | spin_unlock(&vn->sock_lock); |
205f356d | 2679 | return -EBUSY; |
56ef9c90 MRL |
2680 | } |
2681 | spin_unlock(&vn->sock_lock); | |
2682 | } | |
205f356d | 2683 | if (!vs) |
b1be00a6 JB |
2684 | vs = vxlan_socket_create(vxlan->net, ipv6, |
2685 | vxlan->cfg.dst_port, vxlan->flags); | |
205f356d JB |
2686 | if (IS_ERR(vs)) |
2687 | return PTR_ERR(vs); | |
b1be00a6 JB |
2688 | #if IS_ENABLED(CONFIG_IPV6) |
2689 | if (ipv6) | |
2690 | vxlan->vn6_sock = vs; | |
2691 | else | |
2692 | #endif | |
2693 | vxlan->vn4_sock = vs; | |
205f356d JB |
2694 | vxlan_vs_add_dev(vs, vxlan); |
2695 | return 0; | |
553675fb | 2696 | } |
2697 | ||
b1be00a6 JB |
2698 | static int vxlan_sock_add(struct vxlan_dev *vxlan) |
2699 | { | |
2700 | bool ipv6 = vxlan->flags & VXLAN_F_IPV6; | |
2701 | bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA; | |
2702 | int ret = 0; | |
2703 | ||
2704 | vxlan->vn4_sock = NULL; | |
2705 | #if IS_ENABLED(CONFIG_IPV6) | |
2706 | vxlan->vn6_sock = NULL; | |
2707 | if (ipv6 || metadata) | |
2708 | ret = __vxlan_sock_add(vxlan, true); | |
2709 | #endif | |
2710 | if (!ret && (!ipv6 || metadata)) | |
2711 | ret = __vxlan_sock_add(vxlan, false); | |
2712 | if (ret < 0) | |
2713 | vxlan_sock_release(vxlan); | |
2714 | return ret; | |
2715 | } | |
2716 | ||
0dfbdf41 TG |
2717 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
2718 | struct vxlan_config *conf) | |
d342894c | 2719 | { |
33564bbb | 2720 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
07b9b37c | 2721 | struct vxlan_dev *vxlan = netdev_priv(dev), *tmp; |
c7995c43 | 2722 | struct vxlan_rdst *dst = &vxlan->default_dst; |
b1be00a6 | 2723 | unsigned short needed_headroom = ETH_HLEN; |
d342894c | 2724 | int err; |
e4c7ed41 | 2725 | bool use_ipv6 = false; |
0dfbdf41 | 2726 | __be16 default_port = vxlan->cfg.dst_port; |
7e059158 | 2727 | struct net_device *lowerdev = NULL; |
d342894c | 2728 | |
0c867c9b JB |
2729 | vxlan_ether_setup(dev); |
2730 | ||
33564bbb | 2731 | vxlan->net = src_net; |
f01ec1c0 | 2732 | |
0dfbdf41 | 2733 | dst->remote_vni = conf->vni; |
d342894c | 2734 | |
0dfbdf41 | 2735 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); |
d342894c | 2736 | |
0dfbdf41 TG |
2737 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2738 | if (!dst->remote_ip.sa.sa_family) | |
2739 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 | 2740 | |
0dfbdf41 | 2741 | if (dst->remote_ip.sa.sa_family == AF_INET6 || |
057ba29b JB |
2742 | vxlan->cfg.saddr.sa.sa_family == AF_INET6) { |
2743 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2744 | return -EPFNOSUPPORT; | |
e4c7ed41 | 2745 | use_ipv6 = true; |
b1be00a6 | 2746 | vxlan->flags |= VXLAN_F_IPV6; |
057ba29b | 2747 | } |
d342894c | 2748 | |
e7f70af1 DB |
2749 | if (conf->label && !use_ipv6) { |
2750 | pr_info("label only supported in use with IPv6\n"); | |
2751 | return -EINVAL; | |
2752 | } | |
2753 | ||
0dfbdf41 | 2754 | if (conf->remote_ifindex) { |
7e059158 | 2755 | lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex); |
0dfbdf41 | 2756 | dst->remote_ifindex = conf->remote_ifindex; |
34e02aa1 | 2757 | |
2758 | if (!lowerdev) { | |
c7995c43 | 2759 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2760 | return -ENODEV; |
2761 | } | |
d342894c | 2762 | |
e4c7ed41 CW |
2763 | #if IS_ENABLED(CONFIG_IPV6) |
2764 | if (use_ipv6) { | |
2765 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2766 | if (idev && idev->cnf.disable_ipv6) { | |
2767 | pr_info("IPv6 is disabled via sysctl\n"); | |
2768 | return -EPERM; | |
2769 | } | |
e4c7ed41 CW |
2770 | } |
2771 | #endif | |
2772 | ||
0dfbdf41 | 2773 | if (!conf->mtu) |
e4c7ed41 | 2774 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 | 2775 | |
b1be00a6 | 2776 | needed_headroom = lowerdev->hard_header_len; |
9dc2ad10 | 2777 | } |
d342894c | 2778 | |
7e059158 DW |
2779 | if (conf->mtu) { |
2780 | err = __vxlan_change_mtu(dev, lowerdev, dst, conf->mtu, false); | |
2781 | if (err) | |
2782 | return err; | |
2783 | } | |
2784 | ||
b1be00a6 JB |
2785 | if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) |
2786 | needed_headroom += VXLAN6_HEADROOM; | |
2787 | else | |
2788 | needed_headroom += VXLAN_HEADROOM; | |
2789 | dev->needed_headroom = needed_headroom; | |
2790 | ||
0dfbdf41 TG |
2791 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
2792 | if (!vxlan->cfg.dst_port) | |
2793 | vxlan->cfg.dst_port = default_port; | |
2794 | vxlan->flags |= conf->flags; | |
2795 | ||
2796 | if (!vxlan->cfg.age_interval) | |
2797 | vxlan->cfg.age_interval = FDB_AGE_DEFAULT; | |
2798 | ||
07b9b37c ND |
2799 | list_for_each_entry(tmp, &vn->vxlan_list, next) { |
2800 | if (tmp->cfg.vni == conf->vni && | |
2801 | (tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 || | |
2802 | tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 && | |
2803 | tmp->cfg.dst_port == vxlan->cfg.dst_port && | |
2804 | (tmp->flags & VXLAN_F_RCV_FLAGS) == | |
2805 | (vxlan->flags & VXLAN_F_RCV_FLAGS)) | |
0dfbdf41 | 2806 | return -EEXIST; |
07b9b37c | 2807 | } |
0dfbdf41 TG |
2808 | |
2809 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
2810 | ||
2811 | /* create an fdb entry for a valid default destination */ | |
2812 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2813 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2814 | &vxlan->default_dst.remote_ip, | |
2815 | NUD_REACHABLE|NUD_PERMANENT, | |
2816 | NLM_F_EXCL|NLM_F_CREATE, | |
2817 | vxlan->cfg.dst_port, | |
2818 | vxlan->default_dst.remote_vni, | |
2819 | vxlan->default_dst.remote_ifindex, | |
2820 | NTF_SELF); | |
2821 | if (err) | |
2822 | return err; | |
2823 | } | |
2824 | ||
2825 | err = register_netdevice(dev); | |
2826 | if (err) { | |
2827 | vxlan_fdb_delete_default(vxlan); | |
2828 | return err; | |
2829 | } | |
2830 | ||
2831 | list_add(&vxlan->next, &vn->vxlan_list); | |
2832 | ||
2833 | return 0; | |
2834 | } | |
2835 | ||
2836 | struct net_device *vxlan_dev_create(struct net *net, const char *name, | |
2837 | u8 name_assign_type, struct vxlan_config *conf) | |
2838 | { | |
2839 | struct nlattr *tb[IFLA_MAX+1]; | |
2840 | struct net_device *dev; | |
2841 | int err; | |
2842 | ||
2843 | memset(&tb, 0, sizeof(tb)); | |
2844 | ||
2845 | dev = rtnl_create_link(net, name, name_assign_type, | |
2846 | &vxlan_link_ops, tb); | |
2847 | if (IS_ERR(dev)) | |
2848 | return dev; | |
2849 | ||
2850 | err = vxlan_dev_configure(net, dev, conf); | |
2851 | if (err < 0) { | |
2852 | free_netdev(dev); | |
2853 | return ERR_PTR(err); | |
2854 | } | |
2855 | ||
2856 | return dev; | |
2857 | } | |
2858 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
2859 | ||
2860 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
2861 | struct nlattr *tb[], struct nlattr *data[]) | |
2862 | { | |
2863 | struct vxlan_config conf; | |
2864 | int err; | |
2865 | ||
0dfbdf41 | 2866 | memset(&conf, 0, sizeof(conf)); |
e277de5f JG |
2867 | |
2868 | if (data[IFLA_VXLAN_ID]) | |
54bfd872 | 2869 | conf.vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); |
0dfbdf41 TG |
2870 | |
2871 | if (data[IFLA_VXLAN_GROUP]) { | |
2872 | conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); | |
2873 | } else if (data[IFLA_VXLAN_GROUP6]) { | |
2874 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2875 | return -EPFNOSUPPORT; | |
2876 | ||
2877 | conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); | |
2878 | conf.remote_ip.sa.sa_family = AF_INET6; | |
2879 | } | |
2880 | ||
2881 | if (data[IFLA_VXLAN_LOCAL]) { | |
2882 | conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); | |
2883 | conf.saddr.sa.sa_family = AF_INET; | |
2884 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2885 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2886 | return -EPFNOSUPPORT; | |
2887 | ||
2888 | /* TODO: respect scope id */ | |
2889 | conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); | |
2890 | conf.saddr.sa.sa_family = AF_INET6; | |
2891 | } | |
2892 | ||
2893 | if (data[IFLA_VXLAN_LINK]) | |
2894 | conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); | |
2895 | ||
d342894c | 2896 | if (data[IFLA_VXLAN_TOS]) |
0dfbdf41 | 2897 | conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 2898 | |
afb97186 | 2899 | if (data[IFLA_VXLAN_TTL]) |
0dfbdf41 | 2900 | conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 2901 | |
e7f70af1 DB |
2902 | if (data[IFLA_VXLAN_LABEL]) |
2903 | conf.label = nla_get_be32(data[IFLA_VXLAN_LABEL]) & | |
2904 | IPV6_FLOWLABEL_MASK; | |
2905 | ||
d342894c | 2906 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
0dfbdf41 | 2907 | conf.flags |= VXLAN_F_LEARN; |
d342894c | 2908 | |
2909 | if (data[IFLA_VXLAN_AGEING]) | |
0dfbdf41 | 2910 | conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); |
d342894c | 2911 | |
e4f67add | 2912 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
0dfbdf41 | 2913 | conf.flags |= VXLAN_F_PROXY; |
e4f67add DS |
2914 | |
2915 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
0dfbdf41 | 2916 | conf.flags |= VXLAN_F_RSC; |
e4f67add DS |
2917 | |
2918 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
0dfbdf41 | 2919 | conf.flags |= VXLAN_F_L2MISS; |
e4f67add DS |
2920 | |
2921 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
0dfbdf41 | 2922 | conf.flags |= VXLAN_F_L3MISS; |
e4f67add | 2923 | |
d342894c | 2924 | if (data[IFLA_VXLAN_LIMIT]) |
0dfbdf41 | 2925 | conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); |
d342894c | 2926 | |
f8a9b1bc AS |
2927 | if (data[IFLA_VXLAN_COLLECT_METADATA] && |
2928 | nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA])) | |
2929 | conf.flags |= VXLAN_F_COLLECT_METADATA; | |
2930 | ||
05f47d69 | 2931 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2932 | const struct ifla_vxlan_port_range *p | |
2933 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
0dfbdf41 TG |
2934 | conf.port_min = ntohs(p->low); |
2935 | conf.port_max = ntohs(p->high); | |
05f47d69 | 2936 | } |
2937 | ||
823aa873 | 2938 | if (data[IFLA_VXLAN_PORT]) |
0dfbdf41 | 2939 | conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); |
823aa873 | 2940 | |
6ceb31ca AD |
2941 | if (data[IFLA_VXLAN_UDP_CSUM] && |
2942 | !nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) | |
2943 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM_TX; | |
359a0ea9 TH |
2944 | |
2945 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && | |
2946 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
0dfbdf41 | 2947 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; |
359a0ea9 TH |
2948 | |
2949 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && | |
2950 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
0dfbdf41 | 2951 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; |
359a0ea9 | 2952 | |
dfd8645e TH |
2953 | if (data[IFLA_VXLAN_REMCSUM_TX] && |
2954 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
0dfbdf41 | 2955 | conf.flags |= VXLAN_F_REMCSUM_TX; |
dfd8645e TH |
2956 | |
2957 | if (data[IFLA_VXLAN_REMCSUM_RX] && | |
2958 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
0dfbdf41 | 2959 | conf.flags |= VXLAN_F_REMCSUM_RX; |
dfd8645e | 2960 | |
3511494c | 2961 | if (data[IFLA_VXLAN_GBP]) |
0dfbdf41 | 2962 | conf.flags |= VXLAN_F_GBP; |
3511494c | 2963 | |
0ace2ca8 | 2964 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) |
0dfbdf41 | 2965 | conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL; |
0ace2ca8 | 2966 | |
0dfbdf41 TG |
2967 | err = vxlan_dev_configure(src_net, dev, &conf); |
2968 | switch (err) { | |
2969 | case -ENODEV: | |
2970 | pr_info("ifindex %d does not exist\n", conf.remote_ifindex); | |
2971 | break; | |
1b13c97f | 2972 | |
0dfbdf41 TG |
2973 | case -EPERM: |
2974 | pr_info("IPv6 is disabled via sysctl\n"); | |
2975 | break; | |
d342894c | 2976 | |
0dfbdf41 | 2977 | case -EEXIST: |
54bfd872 | 2978 | pr_info("duplicate VNI %u\n", be32_to_cpu(conf.vni)); |
0dfbdf41 | 2979 | break; |
afbd8bae MR |
2980 | } |
2981 | ||
0dfbdf41 | 2982 | return err; |
d342894c | 2983 | } |
2984 | ||
2985 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2986 | { | |
2987 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2988 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 2989 | |
fe5c3561 | 2990 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2991 | if (!hlist_unhashed(&vxlan->hlist)) |
2992 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 2993 | spin_unlock(&vn->sock_lock); |
2994 | ||
58ce31cc | 2995 | gro_cells_destroy(&vxlan->gro_cells); |
553675fb | 2996 | list_del(&vxlan->next); |
d342894c | 2997 | unregister_netdevice_queue(dev, head); |
2998 | } | |
2999 | ||
3000 | static size_t vxlan_get_size(const struct net_device *dev) | |
3001 | { | |
3002 | ||
3003 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 3004 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 3005 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 3006 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 3007 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
3008 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
e7f70af1 | 3009 | nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */ |
d342894c | 3010 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ |
e4f67add DS |
3011 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
3012 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
3013 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
3014 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
da8b43c0 | 3015 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
d342894c | 3016 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
3017 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 3018 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
3019 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
3020 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
3021 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
3022 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
3023 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
3024 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 3025 | 0; |
3026 | } | |
3027 | ||
3028 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
3029 | { | |
3030 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 3031 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 3032 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
3033 | .low = htons(vxlan->cfg.port_min), |
3034 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 3035 | }; |
d342894c | 3036 | |
54bfd872 | 3037 | if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni))) |
d342894c | 3038 | goto nla_put_failure; |
3039 | ||
e4c7ed41 CW |
3040 | if (!vxlan_addr_any(&dst->remote_ip)) { |
3041 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
3042 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
3043 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
3044 | goto nla_put_failure; |
3045 | #if IS_ENABLED(CONFIG_IPV6) | |
3046 | } else { | |
930345ea JB |
3047 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
3048 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
3049 | goto nla_put_failure; |
3050 | #endif | |
3051 | } | |
3052 | } | |
d342894c | 3053 | |
c7995c43 | 3054 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 3055 | goto nla_put_failure; |
3056 | ||
0dfbdf41 TG |
3057 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
3058 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 3059 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 3060 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
3061 | goto nla_put_failure; |
3062 | #if IS_ENABLED(CONFIG_IPV6) | |
3063 | } else { | |
930345ea | 3064 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 3065 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
3066 | goto nla_put_failure; |
3067 | #endif | |
3068 | } | |
3069 | } | |
d342894c | 3070 | |
0dfbdf41 TG |
3071 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
3072 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || | |
e7f70af1 | 3073 | nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) || |
e4f67add DS |
3074 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
3075 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
3076 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
3077 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
3078 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
3079 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
3080 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
3081 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
3082 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
da8b43c0 AS |
3083 | nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
3084 | !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) || | |
0dfbdf41 TG |
3085 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
3086 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
3087 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 | 3088 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
6ceb31ca | 3089 | !(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM_TX)) || |
359a0ea9 TH |
3090 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
3091 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
3092 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
dfd8645e TH |
3093 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
3094 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, | |
3095 | !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) || | |
3096 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, | |
3097 | !!(vxlan->flags & VXLAN_F_REMCSUM_RX))) | |
d342894c | 3098 | goto nla_put_failure; |
3099 | ||
05f47d69 | 3100 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
3101 | goto nla_put_failure; | |
3102 | ||
3511494c TG |
3103 | if (vxlan->flags & VXLAN_F_GBP && |
3104 | nla_put_flag(skb, IFLA_VXLAN_GBP)) | |
3105 | goto nla_put_failure; | |
3106 | ||
0ace2ca8 TH |
3107 | if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL && |
3108 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) | |
3109 | goto nla_put_failure; | |
3110 | ||
d342894c | 3111 | return 0; |
3112 | ||
3113 | nla_put_failure: | |
3114 | return -EMSGSIZE; | |
3115 | } | |
3116 | ||
1728d4fa ND |
3117 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
3118 | { | |
3119 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3120 | ||
3121 | return vxlan->net; | |
3122 | } | |
3123 | ||
d342894c | 3124 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
3125 | .kind = "vxlan", | |
3126 | .maxtype = IFLA_VXLAN_MAX, | |
3127 | .policy = vxlan_policy, | |
3128 | .priv_size = sizeof(struct vxlan_dev), | |
3129 | .setup = vxlan_setup, | |
3130 | .validate = vxlan_validate, | |
3131 | .newlink = vxlan_newlink, | |
3132 | .dellink = vxlan_dellink, | |
3133 | .get_size = vxlan_get_size, | |
3134 | .fill_info = vxlan_fill_info, | |
1728d4fa | 3135 | .get_link_net = vxlan_get_link_net, |
d342894c | 3136 | }; |
3137 | ||
acaf4e70 DB |
3138 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
3139 | struct net_device *dev) | |
3140 | { | |
3141 | struct vxlan_dev *vxlan, *next; | |
3142 | LIST_HEAD(list_kill); | |
3143 | ||
3144 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3145 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3146 | ||
3147 | /* In case we created vxlan device with carrier | |
3148 | * and we loose the carrier due to module unload | |
3149 | * we also need to remove vxlan device. In other | |
3150 | * cases, it's not necessary and remote_ifindex | |
3151 | * is 0 here, so no matches. | |
3152 | */ | |
3153 | if (dst->remote_ifindex == dev->ifindex) | |
3154 | vxlan_dellink(vxlan->dev, &list_kill); | |
3155 | } | |
3156 | ||
3157 | unregister_netdevice_many(&list_kill); | |
3158 | } | |
3159 | ||
3160 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
3161 | unsigned long event, void *ptr) | |
3162 | { | |
3163 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 3164 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 3165 | |
783c1463 | 3166 | if (event == NETDEV_UNREGISTER) |
acaf4e70 DB |
3167 | vxlan_handle_lowerdev_unregister(vn, dev); |
3168 | ||
3169 | return NOTIFY_DONE; | |
3170 | } | |
3171 | ||
3172 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
3173 | .notifier_call = vxlan_lowerdev_event, | |
3174 | }; | |
3175 | ||
d342894c | 3176 | static __net_init int vxlan_init_net(struct net *net) |
3177 | { | |
3178 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 3179 | unsigned int h; |
d342894c | 3180 | |
553675fb | 3181 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 3182 | spin_lock_init(&vn->sock_lock); |
d342894c | 3183 | |
553675fb | 3184 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
3185 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 3186 | |
3187 | return 0; | |
3188 | } | |
3189 | ||
f01ec1c0 ND |
3190 | static void __net_exit vxlan_exit_net(struct net *net) |
3191 | { | |
3192 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3193 | struct vxlan_dev *vxlan, *next; | |
3194 | struct net_device *dev, *aux; | |
3195 | LIST_HEAD(list); | |
3196 | ||
3197 | rtnl_lock(); | |
3198 | for_each_netdev_safe(net, dev, aux) | |
3199 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
3200 | unregister_netdevice_queue(dev, &list); | |
3201 | ||
3202 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3203 | /* If vxlan->dev is in the same netns, it has already been added | |
3204 | * to the list by the previous loop. | |
3205 | */ | |
58ce31cc TH |
3206 | if (!net_eq(dev_net(vxlan->dev), net)) { |
3207 | gro_cells_destroy(&vxlan->gro_cells); | |
13c3ed6a | 3208 | unregister_netdevice_queue(vxlan->dev, &list); |
58ce31cc | 3209 | } |
f01ec1c0 ND |
3210 | } |
3211 | ||
3212 | unregister_netdevice_many(&list); | |
3213 | rtnl_unlock(); | |
3214 | } | |
3215 | ||
d342894c | 3216 | static struct pernet_operations vxlan_net_ops = { |
3217 | .init = vxlan_init_net, | |
f01ec1c0 | 3218 | .exit = vxlan_exit_net, |
d342894c | 3219 | .id = &vxlan_net_id, |
3220 | .size = sizeof(struct vxlan_net), | |
3221 | }; | |
3222 | ||
3223 | static int __init vxlan_init_module(void) | |
3224 | { | |
3225 | int rc; | |
3226 | ||
758c57d1 SH |
3227 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
3228 | if (!vxlan_wq) | |
3229 | return -ENOMEM; | |
3230 | ||
d342894c | 3231 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
3232 | ||
783c1463 | 3233 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 3234 | if (rc) |
3235 | goto out1; | |
3236 | ||
acaf4e70 | 3237 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 3238 | if (rc) |
3239 | goto out2; | |
3240 | ||
acaf4e70 DB |
3241 | rc = rtnl_link_register(&vxlan_link_ops); |
3242 | if (rc) | |
3243 | goto out3; | |
d342894c | 3244 | |
acaf4e70 DB |
3245 | return 0; |
3246 | out3: | |
3247 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 3248 | out2: |
783c1463 | 3249 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 3250 | out1: |
758c57d1 | 3251 | destroy_workqueue(vxlan_wq); |
d342894c | 3252 | return rc; |
3253 | } | |
7332a13b | 3254 | late_initcall(vxlan_init_module); |
d342894c | 3255 | |
3256 | static void __exit vxlan_cleanup_module(void) | |
3257 | { | |
b7153984 | 3258 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 3259 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 3260 | destroy_workqueue(vxlan_wq); |
783c1463 DB |
3261 | unregister_pernet_subsys(&vxlan_net_ops); |
3262 | /* rcu_barrier() is called by netns */ | |
d342894c | 3263 | } |
3264 | module_exit(vxlan_cleanup_module); | |
3265 | ||
3266 | MODULE_LICENSE("GPL"); | |
3267 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 3268 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 3269 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 3270 | MODULE_ALIAS_RTNL_LINK("vxlan"); |