Commit | Line | Data |
---|---|---|
d342894c | 1 | /* |
eb5ce439 | 2 | * VXLAN: Virtual eXtensible Local Area Network |
d342894c | 3 | * |
3b8df3c6 | 4 | * Copyright (c) 2012-2013 Vyatta Inc. |
d342894c | 5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
d342894c | 9 | */ |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/rculist.h> | |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/in.h> | |
22 | #include <linux/ip.h> | |
23 | #include <linux/udp.h> | |
24 | #include <linux/igmp.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/if_ether.h> | |
1eaa8178 | 27 | #include <linux/if_vlan.h> |
d342894c | 28 | #include <linux/hash.h> |
1b13c97f | 29 | #include <linux/ethtool.h> |
e4f67add DS |
30 | #include <net/arp.h> |
31 | #include <net/ndisc.h> | |
d342894c | 32 | #include <net/ip.h> |
c5441932 | 33 | #include <net/ip_tunnels.h> |
d342894c | 34 | #include <net/icmp.h> |
35 | #include <net/udp.h> | |
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; | |
101 | ||
ee122c79 TG |
102 | static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
103 | { | |
e7030878 TG |
104 | return vs->flags & VXLAN_F_COLLECT_METADATA || |
105 | ip_tunnel_collect_metadata(); | |
ee122c79 TG |
106 | } |
107 | ||
e4c7ed41 CW |
108 | #if IS_ENABLED(CONFIG_IPV6) |
109 | static inline | |
110 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
111 | { | |
f0ef3126 JB |
112 | if (a->sa.sa_family != b->sa.sa_family) |
113 | return false; | |
114 | if (a->sa.sa_family == AF_INET6) | |
115 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
116 | else | |
117 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
e4c7ed41 CW |
118 | } |
119 | ||
120 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
121 | { | |
f0ef3126 JB |
122 | if (ipa->sa.sa_family == AF_INET6) |
123 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
124 | else | |
125 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
e4c7ed41 CW |
126 | } |
127 | ||
128 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
129 | { | |
f0ef3126 JB |
130 | if (ipa->sa.sa_family == AF_INET6) |
131 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
132 | else | |
133 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
e4c7ed41 CW |
134 | } |
135 | ||
136 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
137 | { | |
f0ef3126 | 138 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
67b61f6c | 139 | ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
f0ef3126 JB |
140 | ip->sa.sa_family = AF_INET6; |
141 | return 0; | |
142 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 143 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
144 | ip->sa.sa_family = AF_INET; |
145 | return 0; | |
146 | } else { | |
147 | return -EAFNOSUPPORT; | |
148 | } | |
e4c7ed41 CW |
149 | } |
150 | ||
151 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 152 | const union vxlan_addr *ip) |
e4c7ed41 | 153 | { |
f0ef3126 | 154 | if (ip->sa.sa_family == AF_INET6) |
930345ea | 155 | return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
f0ef3126 | 156 | else |
930345ea | 157 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
158 | } |
159 | ||
160 | #else /* !CONFIG_IPV6 */ | |
161 | ||
162 | static inline | |
163 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
164 | { | |
f0ef3126 | 165 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
e4c7ed41 CW |
166 | } |
167 | ||
168 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
169 | { | |
f0ef3126 | 170 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); |
e4c7ed41 CW |
171 | } |
172 | ||
173 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
174 | { | |
f0ef3126 | 175 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); |
e4c7ed41 CW |
176 | } |
177 | ||
178 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
179 | { | |
f0ef3126 JB |
180 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
181 | return -EAFNOSUPPORT; | |
182 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 183 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
184 | ip->sa.sa_family = AF_INET; |
185 | return 0; | |
186 | } else { | |
187 | return -EAFNOSUPPORT; | |
188 | } | |
e4c7ed41 CW |
189 | } |
190 | ||
191 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 192 | const union vxlan_addr *ip) |
e4c7ed41 | 193 | { |
930345ea | 194 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
195 | } |
196 | #endif | |
197 | ||
553675fb | 198 | /* Virtual Network hash table head */ |
54bfd872 | 199 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni) |
553675fb | 200 | { |
54bfd872 | 201 | return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)]; |
553675fb | 202 | } |
203 | ||
204 | /* Socket hash table head */ | |
205 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 206 | { |
207 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
208 | ||
553675fb | 209 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
210 | } | |
211 | ||
3e61aa8f SH |
212 | /* First remote destination for a forwarding entry. |
213 | * Guaranteed to be non-NULL because remotes are never deleted. | |
214 | */ | |
5ca5461c | 215 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 216 | { |
5ca5461c | 217 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
218 | } | |
219 | ||
220 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
221 | { | |
222 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
223 | } |
224 | ||
ac5132d1 TG |
225 | /* Find VXLAN socket based on network namespace, address family and UDP port |
226 | * and enabled unshareable flags. | |
227 | */ | |
228 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
229 | __be16 port, u32 flags) | |
553675fb | 230 | { |
231 | struct vxlan_sock *vs; | |
af33c1ad TH |
232 | |
233 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 234 | |
235 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 236 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
705cc62f | 237 | vxlan_get_sk_family(vs) == family && |
af33c1ad | 238 | vs->flags == flags) |
553675fb | 239 | return vs; |
240 | } | |
241 | return NULL; | |
d342894c | 242 | } |
243 | ||
54bfd872 | 244 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, __be32 vni) |
d342894c | 245 | { |
246 | struct vxlan_dev *vxlan; | |
d342894c | 247 | |
b9167b2e JB |
248 | /* For flow based devices, map all packets to VNI 0 */ |
249 | if (vs->flags & VXLAN_F_COLLECT_METADATA) | |
250 | vni = 0; | |
251 | ||
54bfd872 JB |
252 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, vni), hlist) { |
253 | if (vxlan->default_dst.remote_vni == vni) | |
d342894c | 254 | return vxlan; |
255 | } | |
256 | ||
257 | return NULL; | |
258 | } | |
259 | ||
5cfccc5a | 260 | /* Look up VNI in a per net namespace table */ |
54bfd872 | 261 | static struct vxlan_dev *vxlan_find_vni(struct net *net, __be32 vni, |
ac5132d1 TG |
262 | sa_family_t family, __be16 port, |
263 | u32 flags) | |
5cfccc5a PS |
264 | { |
265 | struct vxlan_sock *vs; | |
266 | ||
ac5132d1 | 267 | vs = vxlan_find_sock(net, family, port, flags); |
5cfccc5a PS |
268 | if (!vs) |
269 | return NULL; | |
270 | ||
54bfd872 | 271 | return vxlan_vs_find_vni(vs, vni); |
5cfccc5a PS |
272 | } |
273 | ||
d342894c | 274 | /* Fill in neighbour message in skbuff. */ |
275 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
276 | const struct vxlan_fdb *fdb, |
277 | u32 portid, u32 seq, int type, unsigned int flags, | |
278 | const struct vxlan_rdst *rdst) | |
d342894c | 279 | { |
280 | unsigned long now = jiffies; | |
281 | struct nda_cacheinfo ci; | |
282 | struct nlmsghdr *nlh; | |
283 | struct ndmsg *ndm; | |
e4f67add | 284 | bool send_ip, send_eth; |
d342894c | 285 | |
286 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
287 | if (nlh == NULL) | |
288 | return -EMSGSIZE; | |
289 | ||
290 | ndm = nlmsg_data(nlh); | |
291 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
292 | |
293 | send_eth = send_ip = true; | |
294 | ||
295 | if (type == RTM_GETNEIGH) { | |
296 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 297 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
298 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
299 | } else | |
300 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 301 | ndm->ndm_state = fdb->state; |
302 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 303 | ndm->ndm_flags = fdb->flags; |
545469f7 | 304 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 305 | |
193523bf | 306 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 307 | nla_put_s32(skb, NDA_LINK_NETNSID, |
7a0877d4 | 308 | peernet2id_alloc(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
309 | goto nla_put_failure; |
310 | ||
e4f67add | 311 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 312 | goto nla_put_failure; |
313 | ||
e4c7ed41 | 314 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
315 | goto nla_put_failure; |
316 | ||
0dfbdf41 | 317 | if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && |
6681712d DS |
318 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
319 | goto nla_put_failure; | |
c7995c43 | 320 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
54bfd872 | 321 | nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni))) |
6681712d DS |
322 | goto nla_put_failure; |
323 | if (rdst->remote_ifindex && | |
324 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 325 | goto nla_put_failure; |
326 | ||
327 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
328 | ci.ndm_confirmed = 0; | |
329 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
330 | ci.ndm_refcnt = 0; | |
331 | ||
332 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
333 | goto nla_put_failure; | |
334 | ||
053c095a JB |
335 | nlmsg_end(skb, nlh); |
336 | return 0; | |
d342894c | 337 | |
338 | nla_put_failure: | |
339 | nlmsg_cancel(skb, nlh); | |
340 | return -EMSGSIZE; | |
341 | } | |
342 | ||
343 | static inline size_t vxlan_nlmsg_size(void) | |
344 | { | |
345 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
346 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 347 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 348 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
349 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
350 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 351 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 352 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
353 | } | |
354 | ||
9e4b93f9 ND |
355 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
356 | struct vxlan_rdst *rd, int type) | |
d342894c | 357 | { |
358 | struct net *net = dev_net(vxlan->dev); | |
359 | struct sk_buff *skb; | |
360 | int err = -ENOBUFS; | |
361 | ||
362 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
363 | if (skb == NULL) | |
364 | goto errout; | |
365 | ||
9e4b93f9 | 366 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 367 | if (err < 0) { |
368 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
369 | WARN_ON(err == -EMSGSIZE); | |
370 | kfree_skb(skb); | |
371 | goto errout; | |
372 | } | |
373 | ||
374 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
375 | return; | |
376 | errout: | |
377 | if (err < 0) | |
378 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
379 | } | |
380 | ||
e4c7ed41 | 381 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
382 | { |
383 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
384 | struct vxlan_fdb f = { |
385 | .state = NUD_STALE, | |
386 | }; | |
387 | struct vxlan_rdst remote = { | |
e4c7ed41 | 388 | .remote_ip = *ipa, /* goes to NDA_DST */ |
54bfd872 | 389 | .remote_vni = cpu_to_be32(VXLAN_N_VID), |
bb3fd687 | 390 | }; |
3e61aa8f | 391 | |
9e4b93f9 | 392 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
393 | } |
394 | ||
395 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
396 | { | |
bb3fd687 SH |
397 | struct vxlan_fdb f = { |
398 | .state = NUD_STALE, | |
399 | }; | |
9e4b93f9 | 400 | struct vxlan_rdst remote = { }; |
e4f67add | 401 | |
e4f67add DS |
402 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
403 | ||
9e4b93f9 | 404 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
405 | } |
406 | ||
d342894c | 407 | /* Hash Ethernet address */ |
408 | static u32 eth_hash(const unsigned char *addr) | |
409 | { | |
410 | u64 value = get_unaligned((u64 *)addr); | |
411 | ||
412 | /* only want 6 bytes */ | |
413 | #ifdef __BIG_ENDIAN | |
d342894c | 414 | value >>= 16; |
321fb991 | 415 | #else |
416 | value <<= 16; | |
d342894c | 417 | #endif |
418 | return hash_64(value, FDB_HASH_BITS); | |
419 | } | |
420 | ||
421 | /* Hash chain to use given mac address */ | |
422 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
423 | const u8 *mac) | |
424 | { | |
425 | return &vxlan->fdb_head[eth_hash(mac)]; | |
426 | } | |
427 | ||
428 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 429 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 430 | const u8 *mac) |
d342894c | 431 | { |
432 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
433 | struct vxlan_fdb *f; | |
d342894c | 434 | |
b67bfe0d | 435 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 436 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 437 | return f; |
438 | } | |
439 | ||
440 | return NULL; | |
441 | } | |
442 | ||
014be2c8 SS |
443 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
444 | const u8 *mac) | |
445 | { | |
446 | struct vxlan_fdb *f; | |
447 | ||
448 | f = __vxlan_find_mac(vxlan, mac); | |
449 | if (f) | |
450 | f->used = jiffies; | |
451 | ||
452 | return f; | |
453 | } | |
454 | ||
a5e7c10a MR |
455 | /* caller should hold vxlan->hash_lock */ |
456 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 457 | union vxlan_addr *ip, __be16 port, |
54bfd872 | 458 | __be32 vni, __u32 ifindex) |
6681712d | 459 | { |
3e61aa8f | 460 | struct vxlan_rdst *rd; |
6681712d | 461 | |
3e61aa8f | 462 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 463 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
464 | rd->remote_port == port && |
465 | rd->remote_vni == vni && | |
466 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 467 | return rd; |
6681712d | 468 | } |
3e61aa8f | 469 | |
a5e7c10a MR |
470 | return NULL; |
471 | } | |
472 | ||
906dc186 TR |
473 | /* Replace destination of unicast mac */ |
474 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
54bfd872 JB |
475 | union vxlan_addr *ip, __be16 port, __be32 vni, |
476 | __u32 ifindex) | |
906dc186 TR |
477 | { |
478 | struct vxlan_rdst *rd; | |
479 | ||
480 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
481 | if (rd) | |
482 | return 0; | |
483 | ||
484 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
485 | if (!rd) | |
486 | return 0; | |
0c1d70af PA |
487 | |
488 | dst_cache_reset(&rd->dst_cache); | |
e4c7ed41 | 489 | rd->remote_ip = *ip; |
906dc186 TR |
490 | rd->remote_port = port; |
491 | rd->remote_vni = vni; | |
492 | rd->remote_ifindex = ifindex; | |
493 | return 1; | |
494 | } | |
495 | ||
a5e7c10a MR |
496 | /* Add/update destinations for multicast */ |
497 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
54bfd872 | 498 | union vxlan_addr *ip, __be16 port, __be32 vni, |
9e4b93f9 | 499 | __u32 ifindex, struct vxlan_rdst **rdp) |
a5e7c10a MR |
500 | { |
501 | struct vxlan_rdst *rd; | |
502 | ||
503 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
504 | if (rd) | |
505 | return 0; | |
506 | ||
6681712d DS |
507 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
508 | if (rd == NULL) | |
509 | return -ENOBUFS; | |
0c1d70af PA |
510 | |
511 | if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) { | |
512 | kfree(rd); | |
513 | return -ENOBUFS; | |
514 | } | |
515 | ||
e4c7ed41 | 516 | rd->remote_ip = *ip; |
6681712d DS |
517 | rd->remote_port = port; |
518 | rd->remote_vni = vni; | |
519 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
520 | |
521 | list_add_tail_rcu(&rd->list, &f->remotes); | |
522 | ||
9e4b93f9 | 523 | *rdp = rd; |
6681712d DS |
524 | return 1; |
525 | } | |
526 | ||
dfd8645e TH |
527 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
528 | unsigned int off, | |
529 | struct vxlanhdr *vh, size_t hdrlen, | |
54bfd872 JB |
530 | __be32 vni_field, |
531 | struct gro_remcsum *grc, | |
0ace2ca8 | 532 | bool nopartial) |
dfd8645e | 533 | { |
b7fe10e5 | 534 | size_t start, offset; |
dfd8645e TH |
535 | |
536 | if (skb->remcsum_offload) | |
b7fe10e5 | 537 | return vh; |
dfd8645e TH |
538 | |
539 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
540 | return NULL; | |
541 | ||
54bfd872 JB |
542 | start = vxlan_rco_start(vni_field); |
543 | offset = start + vxlan_rco_offset(vni_field); | |
dfd8645e | 544 | |
b7fe10e5 TH |
545 | vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
546 | start, offset, grc, nopartial); | |
dfd8645e TH |
547 | |
548 | skb->remcsum_offload = 1; | |
549 | ||
550 | return vh; | |
551 | } | |
552 | ||
5602c48c TH |
553 | static struct sk_buff **vxlan_gro_receive(struct sock *sk, |
554 | struct sk_buff **head, | |
555 | struct sk_buff *skb) | |
dc01e7d3 OG |
556 | { |
557 | struct sk_buff *p, **pp = NULL; | |
558 | struct vxlanhdr *vh, *vh2; | |
9b174d88 | 559 | unsigned int hlen, off_vx; |
dc01e7d3 | 560 | int flush = 1; |
5602c48c | 561 | struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk); |
54bfd872 | 562 | __be32 flags; |
26c4f7da TH |
563 | struct gro_remcsum grc; |
564 | ||
565 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
566 | |
567 | off_vx = skb_gro_offset(skb); | |
568 | hlen = off_vx + sizeof(*vh); | |
569 | vh = skb_gro_header_fast(skb, off_vx); | |
570 | if (skb_gro_header_hard(skb, hlen)) { | |
571 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
572 | if (unlikely(!vh)) | |
573 | goto out; | |
574 | } | |
dc01e7d3 | 575 | |
dfd8645e TH |
576 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
577 | ||
54bfd872 | 578 | flags = vh->vx_flags; |
dfd8645e TH |
579 | |
580 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
581 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
54bfd872 | 582 | vh->vx_vni, &grc, |
0ace2ca8 TH |
583 | !!(vs->flags & |
584 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
585 | |
586 | if (!vh) | |
587 | goto out; | |
588 | } | |
589 | ||
b7fe10e5 TH |
590 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
591 | ||
dc01e7d3 OG |
592 | for (p = *head; p; p = p->next) { |
593 | if (!NAPI_GRO_CB(p)->same_flow) | |
594 | continue; | |
595 | ||
596 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
597 | if (vh->vx_flags != vh2->vx_flags || |
598 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
599 | NAPI_GRO_CB(p)->same_flow = 0; |
600 | continue; | |
601 | } | |
dc01e7d3 OG |
602 | } |
603 | ||
9b174d88 | 604 | pp = eth_gro_receive(head, skb); |
c194cf93 | 605 | flush = 0; |
dc01e7d3 | 606 | |
dc01e7d3 | 607 | out: |
26c4f7da | 608 | skb_gro_remcsum_cleanup(skb, &grc); |
dc01e7d3 OG |
609 | NAPI_GRO_CB(skb)->flush |= flush; |
610 | ||
611 | return pp; | |
612 | } | |
613 | ||
5602c48c | 614 | static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff) |
dc01e7d3 | 615 | { |
229740c6 JR |
616 | /* Sets 'skb->inner_mac_header' since we are always called with |
617 | * 'skb->encapsulation' set. | |
618 | */ | |
9b174d88 | 619 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
620 | } |
621 | ||
53cf5275 | 622 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 623 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
624 | { |
625 | struct net_device *dev; | |
dc01e7d3 | 626 | struct sock *sk = vs->sock->sk; |
53cf5275 | 627 | struct net *net = sock_net(sk); |
705cc62f | 628 | sa_family_t sa_family = vxlan_get_sk_family(vs); |
35e42379 | 629 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
630 | |
631 | rcu_read_lock(); | |
632 | for_each_netdev_rcu(net, dev) { | |
633 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
634 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
635 | port); | |
636 | } | |
637 | rcu_read_unlock(); | |
638 | } | |
639 | ||
640 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 641 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
642 | { |
643 | struct net_device *dev; | |
dc01e7d3 | 644 | struct sock *sk = vs->sock->sk; |
53cf5275 | 645 | struct net *net = sock_net(sk); |
705cc62f | 646 | sa_family_t sa_family = vxlan_get_sk_family(vs); |
35e42379 | 647 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
648 | |
649 | rcu_read_lock(); | |
650 | for_each_netdev_rcu(net, dev) { | |
651 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
652 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
653 | port); | |
654 | } | |
655 | rcu_read_unlock(); | |
656 | } | |
657 | ||
d342894c | 658 | /* Add new entry to forwarding table -- assumes lock held */ |
659 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 660 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 661 | __u16 state, __u16 flags, |
54bfd872 | 662 | __be16 port, __be32 vni, __u32 ifindex, |
ae884082 | 663 | __u8 ndm_flags) |
d342894c | 664 | { |
9e4b93f9 | 665 | struct vxlan_rdst *rd = NULL; |
d342894c | 666 | struct vxlan_fdb *f; |
667 | int notify = 0; | |
668 | ||
014be2c8 | 669 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 670 | if (f) { |
671 | if (flags & NLM_F_EXCL) { | |
672 | netdev_dbg(vxlan->dev, | |
673 | "lost race to create %pM\n", mac); | |
674 | return -EEXIST; | |
675 | } | |
676 | if (f->state != state) { | |
677 | f->state = state; | |
678 | f->updated = jiffies; | |
679 | notify = 1; | |
680 | } | |
ae884082 DS |
681 | if (f->flags != ndm_flags) { |
682 | f->flags = ndm_flags; | |
683 | f->updated = jiffies; | |
684 | notify = 1; | |
685 | } | |
906dc186 TR |
686 | if ((flags & NLM_F_REPLACE)) { |
687 | /* Only change unicasts */ | |
688 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
689 | is_zero_ether_addr(f->eth_addr))) { | |
60840429 | 690 | notify |= vxlan_fdb_replace(f, ip, port, vni, |
906dc186 | 691 | ifindex); |
906dc186 TR |
692 | } else |
693 | return -EOPNOTSUPP; | |
694 | } | |
6681712d | 695 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
696 | (is_multicast_ether_addr(f->eth_addr) || |
697 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
698 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
699 | &rd); | |
6681712d DS |
700 | |
701 | if (rc < 0) | |
702 | return rc; | |
703 | notify |= rc; | |
704 | } | |
d342894c | 705 | } else { |
706 | if (!(flags & NLM_F_CREATE)) | |
707 | return -ENOENT; | |
708 | ||
0dfbdf41 TG |
709 | if (vxlan->cfg.addrmax && |
710 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
d342894c | 711 | return -ENOSPC; |
712 | ||
906dc186 TR |
713 | /* Disallow replace to add a multicast entry */ |
714 | if ((flags & NLM_F_REPLACE) && | |
715 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
716 | return -EOPNOTSUPP; | |
717 | ||
e4c7ed41 | 718 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 719 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
720 | if (!f) | |
721 | return -ENOMEM; | |
722 | ||
723 | notify = 1; | |
d342894c | 724 | f->state = state; |
ae884082 | 725 | f->flags = ndm_flags; |
d342894c | 726 | f->updated = f->used = jiffies; |
3e61aa8f | 727 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 728 | memcpy(f->eth_addr, mac, ETH_ALEN); |
729 | ||
9e4b93f9 | 730 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 731 | |
d342894c | 732 | ++vxlan->addrcnt; |
733 | hlist_add_head_rcu(&f->hlist, | |
734 | vxlan_fdb_head(vxlan, mac)); | |
735 | } | |
736 | ||
9e4b93f9 ND |
737 | if (notify) { |
738 | if (rd == NULL) | |
739 | rd = first_remote_rtnl(f); | |
740 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
741 | } | |
d342894c | 742 | |
743 | return 0; | |
744 | } | |
745 | ||
6706c82e | 746 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
747 | { |
748 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 749 | struct vxlan_rdst *rd, *nd; |
6681712d | 750 | |
0c1d70af PA |
751 | list_for_each_entry_safe(rd, nd, &f->remotes, list) { |
752 | dst_cache_destroy(&rd->dst_cache); | |
6681712d | 753 | kfree(rd); |
0c1d70af | 754 | } |
6681712d DS |
755 | kfree(f); |
756 | } | |
757 | ||
d342894c | 758 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
759 | { | |
760 | netdev_dbg(vxlan->dev, | |
761 | "delete %pM\n", f->eth_addr); | |
762 | ||
763 | --vxlan->addrcnt; | |
9e4b93f9 | 764 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 765 | |
766 | hlist_del_rcu(&f->hlist); | |
6681712d | 767 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 768 | } |
769 | ||
f0b074be | 770 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
54bfd872 JB |
771 | union vxlan_addr *ip, __be16 *port, __be32 *vni, |
772 | u32 *ifindex) | |
d342894c | 773 | { |
6681712d | 774 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 775 | int err; |
d342894c | 776 | |
f0b074be | 777 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
778 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
779 | if (err) | |
780 | return err; | |
f0b074be | 781 | } else { |
e4c7ed41 CW |
782 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
783 | if (remote->sa.sa_family == AF_INET) { | |
784 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
785 | ip->sa.sa_family = AF_INET; | |
786 | #if IS_ENABLED(CONFIG_IPV6) | |
787 | } else { | |
788 | ip->sin6.sin6_addr = in6addr_any; | |
789 | ip->sa.sa_family = AF_INET6; | |
790 | #endif | |
791 | } | |
f0b074be | 792 | } |
d342894c | 793 | |
6681712d | 794 | if (tb[NDA_PORT]) { |
73cf3317 | 795 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 796 | return -EINVAL; |
f0b074be MR |
797 | *port = nla_get_be16(tb[NDA_PORT]); |
798 | } else { | |
0dfbdf41 | 799 | *port = vxlan->cfg.dst_port; |
f0b074be | 800 | } |
6681712d DS |
801 | |
802 | if (tb[NDA_VNI]) { | |
803 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
804 | return -EINVAL; | |
54bfd872 | 805 | *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); |
f0b074be MR |
806 | } else { |
807 | *vni = vxlan->default_dst.remote_vni; | |
808 | } | |
6681712d DS |
809 | |
810 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 811 | struct net_device *tdev; |
6681712d DS |
812 | |
813 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
814 | return -EINVAL; | |
f0b074be | 815 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 816 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 817 | if (!tdev) |
6681712d | 818 | return -EADDRNOTAVAIL; |
f0b074be MR |
819 | } else { |
820 | *ifindex = 0; | |
821 | } | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
826 | /* Add static entry (via netlink) */ | |
827 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
828 | struct net_device *dev, | |
f6f6424b | 829 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
830 | { |
831 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
832 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 833 | union vxlan_addr ip; |
f0b074be | 834 | __be16 port; |
54bfd872 JB |
835 | __be32 vni; |
836 | u32 ifindex; | |
f0b074be MR |
837 | int err; |
838 | ||
839 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
840 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
841 | ndm->ndm_state); | |
842 | return -EINVAL; | |
843 | } | |
844 | ||
845 | if (tb[NDA_DST] == NULL) | |
846 | return -EINVAL; | |
847 | ||
848 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
849 | if (err) | |
850 | return err; | |
6681712d | 851 | |
5933a7bb MR |
852 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
853 | return -EAFNOSUPPORT; | |
854 | ||
d342894c | 855 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 856 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 857 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 858 | spin_unlock_bh(&vxlan->hash_lock); |
859 | ||
860 | return err; | |
861 | } | |
862 | ||
863 | /* Delete entry (via netlink) */ | |
1690be63 VY |
864 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
865 | struct net_device *dev, | |
f6f6424b | 866 | const unsigned char *addr, u16 vid) |
d342894c | 867 | { |
868 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
869 | struct vxlan_fdb *f; | |
bc7892ba | 870 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 871 | union vxlan_addr ip; |
bc7892ba | 872 | __be16 port; |
54bfd872 JB |
873 | __be32 vni; |
874 | u32 ifindex; | |
bc7892ba MR |
875 | int err; |
876 | ||
877 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
878 | if (err) | |
879 | return err; | |
880 | ||
881 | err = -ENOENT; | |
d342894c | 882 | |
883 | spin_lock_bh(&vxlan->hash_lock); | |
884 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
885 | if (!f) |
886 | goto out; | |
887 | ||
e4c7ed41 CW |
888 | if (!vxlan_addr_any(&ip)) { |
889 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
890 | if (!rd) |
891 | goto out; | |
892 | } | |
893 | ||
894 | err = 0; | |
895 | ||
896 | /* remove a destination if it's not the only one on the list, | |
897 | * otherwise destroy the fdb entry | |
898 | */ | |
899 | if (rd && !list_is_singular(&f->remotes)) { | |
900 | list_del_rcu(&rd->list); | |
9e4b93f9 | 901 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 902 | kfree_rcu(rd, rcu); |
bc7892ba | 903 | goto out; |
d342894c | 904 | } |
bc7892ba MR |
905 | |
906 | vxlan_fdb_destroy(vxlan, f); | |
907 | ||
908 | out: | |
d342894c | 909 | spin_unlock_bh(&vxlan->hash_lock); |
910 | ||
911 | return err; | |
912 | } | |
913 | ||
914 | /* Dump forwarding table */ | |
915 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 JHS |
916 | struct net_device *dev, |
917 | struct net_device *filter_dev, int idx) | |
d342894c | 918 | { |
919 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
920 | unsigned int h; | |
921 | ||
922 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
923 | struct vxlan_fdb *f; | |
d342894c | 924 | int err; |
925 | ||
b67bfe0d | 926 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 927 | struct vxlan_rdst *rd; |
6681712d | 928 | |
3e61aa8f | 929 | list_for_each_entry_rcu(rd, &f->remotes, list) { |
07a51cd3 AW |
930 | if (idx < cb->args[0]) |
931 | goto skip; | |
932 | ||
6681712d DS |
933 | err = vxlan_fdb_info(skb, vxlan, f, |
934 | NETLINK_CB(cb->skb).portid, | |
935 | cb->nlh->nlmsg_seq, | |
936 | RTM_NEWNEIGH, | |
937 | NLM_F_MULTI, rd); | |
472681d5 MM |
938 | if (err < 0) { |
939 | cb->args[1] = err; | |
3e61aa8f | 940 | goto out; |
472681d5 | 941 | } |
3e61aa8f | 942 | skip: |
07a51cd3 AW |
943 | ++idx; |
944 | } | |
d342894c | 945 | } |
946 | } | |
3e61aa8f | 947 | out: |
d342894c | 948 | return idx; |
949 | } | |
950 | ||
951 | /* Watch incoming packets to learn mapping between Ethernet address | |
952 | * and Tunnel endpoint. | |
c4b49512 | 953 | * Return true if packet is bogus and should be dropped. |
d342894c | 954 | */ |
26a41ae6 | 955 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 956 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 957 | { |
958 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
959 | struct vxlan_fdb *f; | |
d342894c | 960 | |
961 | f = vxlan_find_mac(vxlan, src_mac); | |
962 | if (likely(f)) { | |
5ca5461c | 963 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 964 | |
e4c7ed41 | 965 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 966 | return false; |
967 | ||
968 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 969 | if (f->state & NUD_NOARP) |
26a41ae6 | 970 | return true; |
d342894c | 971 | |
972 | if (net_ratelimit()) | |
973 | netdev_info(dev, | |
e4c7ed41 | 974 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 975 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 976 | |
e4c7ed41 | 977 | rdst->remote_ip = *src_ip; |
d342894c | 978 | f->updated = jiffies; |
9e4b93f9 | 979 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 980 | } else { |
981 | /* learned new entry */ | |
982 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 983 | |
984 | /* close off race between vxlan_flush and incoming packets */ | |
985 | if (netif_running(dev)) | |
986 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
987 | NUD_REACHABLE, | |
988 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 989 | vxlan->cfg.dst_port, |
3bf74b1a | 990 | vxlan->default_dst.remote_vni, |
991 | 0, NTF_SELF); | |
d342894c | 992 | spin_unlock(&vxlan->hash_lock); |
993 | } | |
26a41ae6 | 994 | |
995 | return false; | |
d342894c | 996 | } |
997 | ||
d342894c | 998 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 999 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1000 | { |
553675fb | 1001 | struct vxlan_dev *vxlan; |
b1be00a6 | 1002 | unsigned short family = dev->default_dst.remote_ip.sa.sa_family; |
d342894c | 1003 | |
95ab0991 G |
1004 | /* The vxlan_sock is only used by dev, leaving group has |
1005 | * no effect on other vxlan devices. | |
1006 | */ | |
b1be00a6 JB |
1007 | if (family == AF_INET && dev->vn4_sock && |
1008 | atomic_read(&dev->vn4_sock->refcnt) == 1) | |
95ab0991 | 1009 | return false; |
b1be00a6 JB |
1010 | #if IS_ENABLED(CONFIG_IPV6) |
1011 | if (family == AF_INET6 && dev->vn6_sock && | |
1012 | atomic_read(&dev->vn6_sock->refcnt) == 1) | |
1013 | return false; | |
1014 | #endif | |
95ab0991 | 1015 | |
553675fb | 1016 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1017 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1018 | continue; |
d342894c | 1019 | |
b1be00a6 | 1020 | if (family == AF_INET && vxlan->vn4_sock != dev->vn4_sock) |
95ab0991 | 1021 | continue; |
b1be00a6 JB |
1022 | #if IS_ENABLED(CONFIG_IPV6) |
1023 | if (family == AF_INET6 && vxlan->vn6_sock != dev->vn6_sock) | |
1024 | continue; | |
1025 | #endif | |
95ab0991 G |
1026 | |
1027 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1028 | &dev->default_dst.remote_ip)) | |
1029 | continue; | |
1030 | ||
1031 | if (vxlan->default_dst.remote_ifindex != | |
1032 | dev->default_dst.remote_ifindex) | |
1033 | continue; | |
1034 | ||
1035 | return true; | |
553675fb | 1036 | } |
d342894c | 1037 | |
1038 | return false; | |
1039 | } | |
1040 | ||
544a773a | 1041 | static bool __vxlan_sock_release_prep(struct vxlan_sock *vs) |
7c47cedf | 1042 | { |
b1be00a6 | 1043 | struct vxlan_net *vn; |
012a5729 | 1044 | |
b1be00a6 | 1045 | if (!vs) |
544a773a | 1046 | return false; |
7c47cedf | 1047 | if (!atomic_dec_and_test(&vs->refcnt)) |
544a773a | 1048 | return false; |
d342894c | 1049 | |
b1be00a6 | 1050 | vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
1c51a915 | 1051 | spin_lock(&vn->sock_lock); |
7c47cedf | 1052 | hlist_del_rcu(&vs->hlist); |
dc01e7d3 | 1053 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1054 | spin_unlock(&vn->sock_lock); |
1055 | ||
544a773a | 1056 | return true; |
d342894c | 1057 | } |
1058 | ||
b1be00a6 JB |
1059 | static void vxlan_sock_release(struct vxlan_dev *vxlan) |
1060 | { | |
544a773a | 1061 | bool ipv4 = __vxlan_sock_release_prep(vxlan->vn4_sock); |
b1be00a6 | 1062 | #if IS_ENABLED(CONFIG_IPV6) |
544a773a HFS |
1063 | bool ipv6 = __vxlan_sock_release_prep(vxlan->vn6_sock); |
1064 | #endif | |
1065 | ||
1066 | synchronize_net(); | |
1067 | ||
1068 | if (ipv4) { | |
1069 | udp_tunnel_sock_release(vxlan->vn4_sock->sock); | |
1070 | kfree(vxlan->vn4_sock); | |
1071 | } | |
1072 | ||
1073 | #if IS_ENABLED(CONFIG_IPV6) | |
1074 | if (ipv6) { | |
1075 | udp_tunnel_sock_release(vxlan->vn6_sock->sock); | |
1076 | kfree(vxlan->vn6_sock); | |
1077 | } | |
b1be00a6 JB |
1078 | #endif |
1079 | } | |
1080 | ||
56ef9c90 | 1081 | /* Update multicast group membership when first VNI on |
c4b49512 | 1082 | * multicast address is brought up |
7c47cedf | 1083 | */ |
56ef9c90 | 1084 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1085 | { |
b1be00a6 | 1086 | struct sock *sk; |
e4c7ed41 CW |
1087 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1088 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1089 | int ret = -EINVAL; |
d342894c | 1090 | |
e4c7ed41 CW |
1091 | if (ip->sa.sa_family == AF_INET) { |
1092 | struct ip_mreqn mreq = { | |
1093 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1094 | .imr_ifindex = ifindex, | |
1095 | }; | |
1096 | ||
b1be00a6 JB |
1097 | sk = vxlan->vn4_sock->sock->sk; |
1098 | lock_sock(sk); | |
56ef9c90 | 1099 | ret = ip_mc_join_group(sk, &mreq); |
b1be00a6 | 1100 | release_sock(sk); |
e4c7ed41 CW |
1101 | #if IS_ENABLED(CONFIG_IPV6) |
1102 | } else { | |
b1be00a6 JB |
1103 | sk = vxlan->vn6_sock->sock->sk; |
1104 | lock_sock(sk); | |
56ef9c90 MRL |
1105 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1106 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1107 | release_sock(sk); |
e4c7ed41 CW |
1108 | #endif |
1109 | } | |
3fc2de2f | 1110 | |
56ef9c90 | 1111 | return ret; |
3fc2de2f | 1112 | } |
1113 | ||
1114 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1115 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1116 | { |
b1be00a6 | 1117 | struct sock *sk; |
e4c7ed41 CW |
1118 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1119 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1120 | int ret = -EINVAL; |
3fc2de2f | 1121 | |
e4c7ed41 CW |
1122 | if (ip->sa.sa_family == AF_INET) { |
1123 | struct ip_mreqn mreq = { | |
1124 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1125 | .imr_ifindex = ifindex, | |
1126 | }; | |
1127 | ||
b1be00a6 JB |
1128 | sk = vxlan->vn4_sock->sock->sk; |
1129 | lock_sock(sk); | |
56ef9c90 | 1130 | ret = ip_mc_leave_group(sk, &mreq); |
b1be00a6 | 1131 | release_sock(sk); |
e4c7ed41 CW |
1132 | #if IS_ENABLED(CONFIG_IPV6) |
1133 | } else { | |
b1be00a6 JB |
1134 | sk = vxlan->vn6_sock->sock->sk; |
1135 | lock_sock(sk); | |
56ef9c90 MRL |
1136 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1137 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1138 | release_sock(sk); |
e4c7ed41 CW |
1139 | #endif |
1140 | } | |
d342894c | 1141 | |
56ef9c90 | 1142 | return ret; |
d342894c | 1143 | } |
1144 | ||
f14ecebb JB |
1145 | static bool vxlan_remcsum(struct vxlanhdr *unparsed, |
1146 | struct sk_buff *skb, u32 vxflags) | |
dfd8645e | 1147 | { |
7d34fa75 | 1148 | size_t start, offset; |
dfd8645e | 1149 | |
f14ecebb JB |
1150 | if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload) |
1151 | goto out; | |
b7fe10e5 | 1152 | |
f14ecebb JB |
1153 | start = vxlan_rco_start(unparsed->vx_vni); |
1154 | offset = start + vxlan_rco_offset(unparsed->vx_vni); | |
dfd8645e | 1155 | |
7d34fa75 | 1156 | if (!pskb_may_pull(skb, offset + sizeof(u16))) |
be5cfeab | 1157 | return false; |
dfd8645e | 1158 | |
be5cfeab JB |
1159 | skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset, |
1160 | !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
f14ecebb JB |
1161 | out: |
1162 | unparsed->vx_flags &= ~VXLAN_HF_RCO; | |
1163 | unparsed->vx_vni &= VXLAN_VNI_MASK; | |
be5cfeab | 1164 | return true; |
dfd8645e TH |
1165 | } |
1166 | ||
f14ecebb | 1167 | static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed, |
64f87d36 | 1168 | struct sk_buff *skb, u32 vxflags, |
10a5af23 | 1169 | struct vxlan_metadata *md) |
3288af08 | 1170 | { |
f14ecebb | 1171 | struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed; |
10a5af23 | 1172 | struct metadata_dst *tun_dst; |
f14ecebb JB |
1173 | |
1174 | if (!(unparsed->vx_flags & VXLAN_HF_GBP)) | |
1175 | goto out; | |
3288af08 | 1176 | |
3288af08 JB |
1177 | md->gbp = ntohs(gbp->policy_id); |
1178 | ||
10a5af23 | 1179 | tun_dst = (struct metadata_dst *)skb_dst(skb); |
810813c4 | 1180 | if (tun_dst) { |
3288af08 | 1181 | tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
810813c4 DM |
1182 | tun_dst->u.tun_info.options_len = sizeof(*md); |
1183 | } | |
3288af08 JB |
1184 | if (gbp->dont_learn) |
1185 | md->gbp |= VXLAN_GBP_DONT_LEARN; | |
1186 | ||
1187 | if (gbp->policy_applied) | |
1188 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; | |
f14ecebb | 1189 | |
64f87d36 JB |
1190 | /* In flow-based mode, GBP is carried in dst_metadata */ |
1191 | if (!(vxflags & VXLAN_F_COLLECT_METADATA)) | |
1192 | skb->mark = md->gbp; | |
f14ecebb JB |
1193 | out: |
1194 | unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS; | |
3288af08 JB |
1195 | } |
1196 | ||
e1e5314d | 1197 | static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed, |
61618eea | 1198 | __be16 *protocol, |
e1e5314d JB |
1199 | struct sk_buff *skb, u32 vxflags) |
1200 | { | |
1201 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed; | |
1202 | ||
1203 | /* Need to have Next Protocol set for interfaces in GPE mode. */ | |
1204 | if (!gpe->np_applied) | |
1205 | return false; | |
1206 | /* "The initial version is 0. If a receiver does not support the | |
1207 | * version indicated it MUST drop the packet. | |
1208 | */ | |
1209 | if (gpe->version != 0) | |
1210 | return false; | |
1211 | /* "When the O bit is set to 1, the packet is an OAM packet and OAM | |
1212 | * processing MUST occur." However, we don't implement OAM | |
1213 | * processing, thus drop the packet. | |
1214 | */ | |
1215 | if (gpe->oam_flag) | |
1216 | return false; | |
1217 | ||
1218 | switch (gpe->next_protocol) { | |
1219 | case VXLAN_GPE_NP_IPV4: | |
1220 | *protocol = htons(ETH_P_IP); | |
1221 | break; | |
1222 | case VXLAN_GPE_NP_IPV6: | |
1223 | *protocol = htons(ETH_P_IPV6); | |
1224 | break; | |
1225 | case VXLAN_GPE_NP_ETHERNET: | |
1226 | *protocol = htons(ETH_P_TEB); | |
1227 | break; | |
1228 | default: | |
1229 | return false; | |
1230 | } | |
1231 | ||
1232 | unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS; | |
1233 | return true; | |
1234 | } | |
1235 | ||
1ab016e2 JB |
1236 | static bool vxlan_set_mac(struct vxlan_dev *vxlan, |
1237 | struct vxlan_sock *vs, | |
1238 | struct sk_buff *skb) | |
614732ea | 1239 | { |
614732ea | 1240 | union vxlan_addr saddr; |
614732ea | 1241 | |
614732ea | 1242 | skb_reset_mac_header(skb); |
614732ea TG |
1243 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
1244 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1245 | ||
1246 | /* Ignore packet loops (and multicast echo) */ | |
1247 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1ab016e2 | 1248 | return false; |
614732ea | 1249 | |
760c6805 | 1250 | /* Get address from the outer IP header */ |
ce212d0f | 1251 | if (vxlan_get_sk_family(vs) == AF_INET) { |
1ab016e2 | 1252 | saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; |
614732ea TG |
1253 | saddr.sa.sa_family = AF_INET; |
1254 | #if IS_ENABLED(CONFIG_IPV6) | |
1255 | } else { | |
1ab016e2 | 1256 | saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr; |
614732ea TG |
1257 | saddr.sa.sa_family = AF_INET6; |
1258 | #endif | |
1259 | } | |
1260 | ||
1ab016e2 JB |
1261 | if ((vxlan->flags & VXLAN_F_LEARN) && |
1262 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) | |
1263 | return false; | |
1264 | ||
1265 | return true; | |
1266 | } | |
1267 | ||
760c6805 JB |
1268 | static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph, |
1269 | struct sk_buff *skb) | |
1270 | { | |
1271 | int err = 0; | |
1272 | ||
1273 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1274 | err = IP_ECN_decapsulate(oiph, skb); | |
1275 | #if IS_ENABLED(CONFIG_IPV6) | |
1276 | else | |
1277 | err = IP6_ECN_decapsulate(oiph, skb); | |
1278 | #endif | |
1279 | ||
1280 | if (unlikely(err) && log_ecn_error) { | |
1281 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1282 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1283 | &((struct iphdr *)oiph)->saddr, | |
1284 | ((struct iphdr *)oiph)->tos); | |
1285 | else | |
1286 | net_info_ratelimited("non-ECT from %pI6\n", | |
1287 | &((struct ipv6hdr *)oiph)->saddr); | |
1288 | } | |
1289 | return err <= 1; | |
1290 | } | |
1291 | ||
d342894c | 1292 | /* Callback from net/ipv4/udp.c to receive packets */ |
f2d1968e | 1293 | static int vxlan_rcv(struct sock *sk, struct sk_buff *skb) |
d342894c | 1294 | { |
f2d1968e | 1295 | struct pcpu_sw_netstats *stats; |
c9e78efb | 1296 | struct vxlan_dev *vxlan; |
5cfccc5a | 1297 | struct vxlan_sock *vs; |
f14ecebb | 1298 | struct vxlanhdr unparsed; |
ee122c79 TG |
1299 | struct vxlan_metadata _md; |
1300 | struct vxlan_metadata *md = &_md; | |
61618eea | 1301 | __be16 protocol = htons(ETH_P_TEB); |
e1e5314d | 1302 | bool raw_proto = false; |
f2d1968e | 1303 | void *oiph; |
d342894c | 1304 | |
e1e5314d | 1305 | /* Need UDP and VXLAN header to be present */ |
7ce04758 | 1306 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
e5aed006 | 1307 | goto drop; |
d342894c | 1308 | |
f14ecebb | 1309 | unparsed = *vxlan_hdr(skb); |
288b01c8 JB |
1310 | /* VNI flag always required to be set */ |
1311 | if (!(unparsed.vx_flags & VXLAN_HF_VNI)) { | |
1312 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1313 | ntohl(vxlan_hdr(skb)->vx_flags), | |
1314 | ntohl(vxlan_hdr(skb)->vx_vni)); | |
1315 | /* Return non vxlan pkt */ | |
e5aed006 | 1316 | goto drop; |
d342894c | 1317 | } |
288b01c8 JB |
1318 | unparsed.vx_flags &= ~VXLAN_HF_VNI; |
1319 | unparsed.vx_vni &= ~VXLAN_VNI_MASK; | |
d342894c | 1320 | |
559835ea | 1321 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1322 | if (!vs) |
d342894c | 1323 | goto drop; |
d342894c | 1324 | |
c9e78efb JB |
1325 | vxlan = vxlan_vs_find_vni(vs, vxlan_vni(vxlan_hdr(skb)->vx_vni)); |
1326 | if (!vxlan) | |
1327 | goto drop; | |
1328 | ||
e1e5314d JB |
1329 | /* For backwards compatibility, only allow reserved fields to be |
1330 | * used by VXLAN extensions if explicitly requested. | |
1331 | */ | |
1332 | if (vs->flags & VXLAN_F_GPE) { | |
1333 | if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags)) | |
1334 | goto drop; | |
1335 | raw_proto = true; | |
1336 | } | |
1337 | ||
1338 | if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto, | |
1339 | !net_eq(vxlan->net, dev_net(vxlan->dev)))) | |
1340 | goto drop; | |
c9e78efb | 1341 | |
ee122c79 | 1342 | if (vxlan_collect_metadata(vs)) { |
07dabf20 | 1343 | __be32 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni); |
10a5af23 | 1344 | struct metadata_dst *tun_dst; |
07dabf20 | 1345 | |
c29a70d2 | 1346 | tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
07dabf20 | 1347 | vxlan_vni_to_tun_id(vni), sizeof(*md)); |
c29a70d2 | 1348 | |
ee122c79 TG |
1349 | if (!tun_dst) |
1350 | goto drop; | |
1351 | ||
0f1b7354 | 1352 | md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
10a5af23 JB |
1353 | |
1354 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
ee122c79 TG |
1355 | } else { |
1356 | memset(md, 0, sizeof(*md)); | |
1357 | } | |
1358 | ||
f14ecebb JB |
1359 | if (vs->flags & VXLAN_F_REMCSUM_RX) |
1360 | if (!vxlan_remcsum(&unparsed, skb, vs->flags)) | |
1361 | goto drop; | |
1362 | if (vs->flags & VXLAN_F_GBP) | |
10a5af23 | 1363 | vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md); |
e1e5314d JB |
1364 | /* Note that GBP and GPE can never be active together. This is |
1365 | * ensured in vxlan_dev_configure. | |
1366 | */ | |
3511494c | 1367 | |
f14ecebb | 1368 | if (unparsed.vx_flags || unparsed.vx_vni) { |
3bf39475 TH |
1369 | /* If there are any unprocessed flags remaining treat |
1370 | * this as a malformed packet. This behavior diverges from | |
1371 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1372 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1373 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1374 | * is more robust and provides a little more security in |
1375 | * adding extensions to VXLAN. | |
1376 | */ | |
288b01c8 | 1377 | goto drop; |
3bf39475 TH |
1378 | } |
1379 | ||
e1e5314d JB |
1380 | if (!raw_proto) { |
1381 | if (!vxlan_set_mac(vxlan, vs, skb)) | |
1382 | goto drop; | |
1383 | } else { | |
8be0cfa4 | 1384 | skb_reset_mac_header(skb); |
e1e5314d JB |
1385 | skb->dev = vxlan->dev; |
1386 | skb->pkt_type = PACKET_HOST; | |
1387 | } | |
f2d1968e | 1388 | |
f2d1968e JB |
1389 | oiph = skb_network_header(skb); |
1390 | skb_reset_network_header(skb); | |
1391 | ||
1392 | if (!vxlan_ecn_decapsulate(vs, oiph, skb)) { | |
1393 | ++vxlan->dev->stats.rx_frame_errors; | |
1394 | ++vxlan->dev->stats.rx_errors; | |
1395 | goto drop; | |
1396 | } | |
1397 | ||
1398 | stats = this_cpu_ptr(vxlan->dev->tstats); | |
1399 | u64_stats_update_begin(&stats->syncp); | |
1400 | stats->rx_packets++; | |
1401 | stats->rx_bytes += skb->len; | |
1402 | u64_stats_update_end(&stats->syncp); | |
1403 | ||
1404 | gro_cells_receive(&vxlan->gro_cells, skb); | |
5cfccc5a PS |
1405 | return 0; |
1406 | ||
1407 | drop: | |
288b01c8 JB |
1408 | /* Consume bad packet */ |
1409 | kfree_skb(skb); | |
1410 | return 0; | |
5cfccc5a PS |
1411 | } |
1412 | ||
e4f67add DS |
1413 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1414 | { | |
1415 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1416 | struct arphdr *parp; | |
1417 | u8 *arpptr, *sha; | |
1418 | __be32 sip, tip; | |
1419 | struct neighbour *n; | |
1420 | ||
1421 | if (dev->flags & IFF_NOARP) | |
1422 | goto out; | |
1423 | ||
1424 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1425 | dev->stats.tx_dropped++; | |
1426 | goto out; | |
1427 | } | |
1428 | parp = arp_hdr(skb); | |
1429 | ||
1430 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1431 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1432 | parp->ar_pro != htons(ETH_P_IP) || | |
1433 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1434 | parp->ar_hln != dev->addr_len || | |
1435 | parp->ar_pln != 4) | |
1436 | goto out; | |
1437 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1438 | sha = arpptr; | |
1439 | arpptr += dev->addr_len; /* sha */ | |
1440 | memcpy(&sip, arpptr, sizeof(sip)); | |
1441 | arpptr += sizeof(sip); | |
1442 | arpptr += dev->addr_len; /* tha */ | |
1443 | memcpy(&tip, arpptr, sizeof(tip)); | |
1444 | ||
1445 | if (ipv4_is_loopback(tip) || | |
1446 | ipv4_is_multicast(tip)) | |
1447 | goto out; | |
1448 | ||
1449 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1450 | ||
1451 | if (n) { | |
e4f67add DS |
1452 | struct vxlan_fdb *f; |
1453 | struct sk_buff *reply; | |
1454 | ||
1455 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1456 | neigh_release(n); | |
1457 | goto out; | |
1458 | } | |
1459 | ||
1460 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1461 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1462 | /* bridge-local neighbor */ |
1463 | neigh_release(n); | |
1464 | goto out; | |
1465 | } | |
1466 | ||
1467 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1468 | n->ha, sha); | |
1469 | ||
1470 | neigh_release(n); | |
1471 | ||
7346135d DS |
1472 | if (reply == NULL) |
1473 | goto out; | |
1474 | ||
e4f67add DS |
1475 | skb_reset_mac_header(reply); |
1476 | __skb_pull(reply, skb_network_offset(reply)); | |
1477 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1478 | reply->pkt_type = PACKET_HOST; | |
1479 | ||
1480 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1481 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1482 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1483 | union vxlan_addr ipa = { | |
1484 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1485 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1486 | }; |
1487 | ||
1488 | vxlan_ip_miss(dev, &ipa); | |
1489 | } | |
e4f67add DS |
1490 | out: |
1491 | consume_skb(skb); | |
1492 | return NETDEV_TX_OK; | |
1493 | } | |
1494 | ||
f564f45c | 1495 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1496 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1497 | struct neighbour *n, bool isrouter) | |
1498 | { | |
1499 | struct net_device *dev = request->dev; | |
1500 | struct sk_buff *reply; | |
1501 | struct nd_msg *ns, *na; | |
1502 | struct ipv6hdr *pip6; | |
1503 | u8 *daddr; | |
1504 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1505 | int ns_olen; | |
1506 | int i, len; | |
1507 | ||
1508 | if (dev == NULL) | |
1509 | return NULL; | |
1510 | ||
1511 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1512 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1513 | reply = alloc_skb(len, GFP_ATOMIC); | |
1514 | if (reply == NULL) | |
1515 | return NULL; | |
1516 | ||
1517 | reply->protocol = htons(ETH_P_IPV6); | |
1518 | reply->dev = dev; | |
1519 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1520 | skb_push(reply, sizeof(struct ethhdr)); | |
6297b91c | 1521 | skb_reset_mac_header(reply); |
4b29dba9 DS |
1522 | |
1523 | ns = (struct nd_msg *)skb_transport_header(request); | |
1524 | ||
1525 | daddr = eth_hdr(request)->h_source; | |
1526 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1527 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1528 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1529 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1530 | break; | |
1531 | } | |
1532 | } | |
1533 | ||
1534 | /* Ethernet header */ | |
1535 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1536 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1537 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1538 | reply->protocol = htons(ETH_P_IPV6); | |
1539 | ||
1540 | skb_pull(reply, sizeof(struct ethhdr)); | |
6297b91c | 1541 | skb_reset_network_header(reply); |
4b29dba9 DS |
1542 | skb_put(reply, sizeof(struct ipv6hdr)); |
1543 | ||
1544 | /* IPv6 header */ | |
1545 | ||
1546 | pip6 = ipv6_hdr(reply); | |
1547 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1548 | pip6->version = 6; | |
1549 | pip6->priority = ipv6_hdr(request)->priority; | |
1550 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1551 | pip6->hop_limit = 255; | |
1552 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1553 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1554 | ||
1555 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
6297b91c | 1556 | skb_reset_transport_header(reply); |
4b29dba9 DS |
1557 | |
1558 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1559 | ||
1560 | /* Neighbor Advertisement */ | |
1561 | memset(na, 0, sizeof(*na)+na_olen); | |
1562 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1563 | na->icmph.icmp6_router = isrouter; | |
1564 | na->icmph.icmp6_override = 1; | |
1565 | na->icmph.icmp6_solicited = 1; | |
1566 | na->target = ns->target; | |
1567 | ether_addr_copy(&na->opt[2], n->ha); | |
1568 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1569 | na->opt[1] = na_olen >> 3; | |
1570 | ||
1571 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1572 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1573 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1574 | ||
1575 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1576 | ||
1577 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1578 | ||
1579 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1580 | ||
1581 | return reply; | |
1582 | } | |
1583 | ||
f564f45c CW |
1584 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1585 | { | |
1586 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1587 | struct nd_msg *msg; |
f564f45c CW |
1588 | const struct ipv6hdr *iphdr; |
1589 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1590 | struct neighbour *n; |
1591 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1592 | |
1593 | in6_dev = __in6_dev_get(dev); | |
1594 | if (!in6_dev) | |
1595 | goto out; | |
1596 | ||
f564f45c CW |
1597 | iphdr = ipv6_hdr(skb); |
1598 | saddr = &iphdr->saddr; | |
1599 | daddr = &iphdr->daddr; | |
1600 | ||
f564f45c CW |
1601 | msg = (struct nd_msg *)skb_transport_header(skb); |
1602 | if (msg->icmph.icmp6_code != 0 || | |
1603 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1604 | goto out; | |
1605 | ||
4b29dba9 DS |
1606 | if (ipv6_addr_loopback(daddr) || |
1607 | ipv6_addr_is_multicast(&msg->target)) | |
1608 | goto out; | |
1609 | ||
1610 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1611 | |
1612 | if (n) { | |
1613 | struct vxlan_fdb *f; | |
4b29dba9 | 1614 | struct sk_buff *reply; |
f564f45c CW |
1615 | |
1616 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1617 | neigh_release(n); | |
1618 | goto out; | |
1619 | } | |
1620 | ||
1621 | f = vxlan_find_mac(vxlan, n->ha); | |
1622 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1623 | /* bridge-local neighbor */ | |
1624 | neigh_release(n); | |
1625 | goto out; | |
1626 | } | |
1627 | ||
4b29dba9 DS |
1628 | reply = vxlan_na_create(skb, n, |
1629 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1630 | ||
f564f45c | 1631 | neigh_release(n); |
4b29dba9 DS |
1632 | |
1633 | if (reply == NULL) | |
1634 | goto out; | |
1635 | ||
1636 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1637 | dev->stats.rx_dropped++; | |
1638 | ||
f564f45c | 1639 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1640 | union vxlan_addr ipa = { |
1641 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1642 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1643 | }; |
1644 | ||
f564f45c CW |
1645 | vxlan_ip_miss(dev, &ipa); |
1646 | } | |
1647 | ||
1648 | out: | |
1649 | consume_skb(skb); | |
1650 | return NETDEV_TX_OK; | |
1651 | } | |
1652 | #endif | |
1653 | ||
e4f67add DS |
1654 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1655 | { | |
1656 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1657 | struct neighbour *n; | |
e4f67add DS |
1658 | |
1659 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1660 | return false; | |
1661 | ||
1662 | n = NULL; | |
1663 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1664 | case ETH_P_IP: | |
e15a00aa CW |
1665 | { |
1666 | struct iphdr *pip; | |
1667 | ||
e4f67add DS |
1668 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1669 | return false; | |
1670 | pip = ip_hdr(skb); | |
1671 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1672 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1673 | union vxlan_addr ipa = { | |
1674 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 1675 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1676 | }; |
1677 | ||
1678 | vxlan_ip_miss(dev, &ipa); | |
1679 | return false; | |
1680 | } | |
1681 | ||
e4f67add | 1682 | break; |
e15a00aa CW |
1683 | } |
1684 | #if IS_ENABLED(CONFIG_IPV6) | |
1685 | case ETH_P_IPV6: | |
1686 | { | |
1687 | struct ipv6hdr *pip6; | |
1688 | ||
1689 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1690 | return false; | |
1691 | pip6 = ipv6_hdr(skb); | |
1692 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1693 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1694 | union vxlan_addr ipa = { | |
1695 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 1696 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
1697 | }; |
1698 | ||
1699 | vxlan_ip_miss(dev, &ipa); | |
1700 | return false; | |
1701 | } | |
1702 | ||
1703 | break; | |
1704 | } | |
1705 | #endif | |
e4f67add DS |
1706 | default: |
1707 | return false; | |
1708 | } | |
1709 | ||
1710 | if (n) { | |
1711 | bool diff; | |
1712 | ||
7367d0b5 | 1713 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1714 | if (diff) { |
1715 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1716 | dev->addr_len); | |
1717 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1718 | } | |
1719 | neigh_release(n); | |
1720 | return diff; | |
e4c7ed41 CW |
1721 | } |
1722 | ||
e4f67add DS |
1723 | return false; |
1724 | } | |
1725 | ||
af33c1ad | 1726 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
1727 | struct vxlan_metadata *md) |
1728 | { | |
1729 | struct vxlanhdr_gbp *gbp; | |
1730 | ||
db79a621 TG |
1731 | if (!md->gbp) |
1732 | return; | |
1733 | ||
3511494c | 1734 | gbp = (struct vxlanhdr_gbp *)vxh; |
54bfd872 | 1735 | vxh->vx_flags |= VXLAN_HF_GBP; |
3511494c TG |
1736 | |
1737 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
1738 | gbp->dont_learn = 1; | |
1739 | ||
1740 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
1741 | gbp->policy_applied = 1; | |
1742 | ||
1743 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
1744 | } | |
1745 | ||
e1e5314d JB |
1746 | static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags, |
1747 | __be16 protocol) | |
1748 | { | |
1749 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh; | |
1750 | ||
1751 | gpe->np_applied = 1; | |
1752 | ||
1753 | switch (protocol) { | |
1754 | case htons(ETH_P_IP): | |
1755 | gpe->next_protocol = VXLAN_GPE_NP_IPV4; | |
1756 | return 0; | |
1757 | case htons(ETH_P_IPV6): | |
1758 | gpe->next_protocol = VXLAN_GPE_NP_IPV6; | |
1759 | return 0; | |
1760 | case htons(ETH_P_TEB): | |
1761 | gpe->next_protocol = VXLAN_GPE_NP_ETHERNET; | |
1762 | return 0; | |
1763 | } | |
1764 | return -EPFNOSUPPORT; | |
1765 | } | |
1766 | ||
f491e56d JB |
1767 | static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst, |
1768 | int iphdr_len, __be32 vni, | |
1769 | struct vxlan_metadata *md, u32 vxflags, | |
b4ed5cad | 1770 | bool udp_sum) |
e4c7ed41 | 1771 | { |
e4c7ed41 | 1772 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
1773 | int min_headroom; |
1774 | int err; | |
dfd8645e | 1775 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
e1e5314d | 1776 | __be16 inner_protocol = htons(ETH_P_TEB); |
dfd8645e | 1777 | |
af33c1ad | 1778 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1779 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1780 | int csum_start = skb_checksum_start_offset(skb); | |
1781 | ||
1782 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1783 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1784 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
b5708501 | 1785 | skb->csum_offset == offsetof(struct tcphdr, check))) |
dfd8645e | 1786 | type |= SKB_GSO_TUNNEL_REMCSUM; |
dfd8645e | 1787 | } |
e4c7ed41 | 1788 | |
e4c7ed41 | 1789 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
f491e56d | 1790 | + VXLAN_HLEN + iphdr_len |
df8a39de | 1791 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
649c5b8b PS |
1792 | |
1793 | /* Need space for new headers (invalidates iph ptr) */ | |
1794 | err = skb_cow_head(skb, min_headroom); | |
e1e5314d JB |
1795 | if (unlikely(err)) |
1796 | goto out_free; | |
649c5b8b | 1797 | |
5968250c JP |
1798 | skb = vlan_hwaccel_push_inside(skb); |
1799 | if (WARN_ON(!skb)) | |
1800 | return -ENOMEM; | |
1eaa8178 | 1801 | |
aed069df AD |
1802 | err = iptunnel_handle_offloads(skb, type); |
1803 | if (err) | |
1804 | goto out_free; | |
b736a623 | 1805 | |
49560532 | 1806 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
54bfd872 JB |
1807 | vxh->vx_flags = VXLAN_HF_VNI; |
1808 | vxh->vx_vni = vxlan_vni_field(vni); | |
49560532 | 1809 | |
dfd8645e | 1810 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
54bfd872 | 1811 | unsigned int start; |
dfd8645e | 1812 | |
54bfd872 JB |
1813 | start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr); |
1814 | vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset); | |
1815 | vxh->vx_flags |= VXLAN_HF_RCO; | |
dfd8645e TH |
1816 | |
1817 | if (!skb_is_gso(skb)) { | |
1818 | skb->ip_summed = CHECKSUM_NONE; | |
1819 | skb->encapsulation = 0; | |
1820 | } | |
1821 | } | |
1822 | ||
af33c1ad TH |
1823 | if (vxflags & VXLAN_F_GBP) |
1824 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
e1e5314d JB |
1825 | if (vxflags & VXLAN_F_GPE) { |
1826 | err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol); | |
1827 | if (err < 0) | |
1828 | goto out_free; | |
1829 | inner_protocol = skb->protocol; | |
1830 | } | |
3511494c | 1831 | |
e1e5314d | 1832 | skb_set_inner_protocol(skb, inner_protocol); |
039f5062 | 1833 | return 0; |
e1e5314d JB |
1834 | |
1835 | out_free: | |
1836 | kfree_skb(skb); | |
1837 | return err; | |
49560532 | 1838 | } |
49560532 | 1839 | |
1a8496ba JB |
1840 | static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, |
1841 | struct sk_buff *skb, int oif, u8 tos, | |
0c1d70af PA |
1842 | __be32 daddr, __be32 *saddr, |
1843 | struct dst_cache *dst_cache, | |
db3c6139 | 1844 | const struct ip_tunnel_info *info) |
1a8496ba | 1845 | { |
db3c6139 | 1846 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
1a8496ba JB |
1847 | struct rtable *rt = NULL; |
1848 | struct flowi4 fl4; | |
1849 | ||
db3c6139 DB |
1850 | if (tos && !info) |
1851 | use_cache = false; | |
1852 | if (use_cache) { | |
0c1d70af PA |
1853 | rt = dst_cache_get_ip4(dst_cache, saddr); |
1854 | if (rt) | |
1855 | return rt; | |
1856 | } | |
1857 | ||
1a8496ba JB |
1858 | memset(&fl4, 0, sizeof(fl4)); |
1859 | fl4.flowi4_oif = oif; | |
1860 | fl4.flowi4_tos = RT_TOS(tos); | |
1861 | fl4.flowi4_mark = skb->mark; | |
1862 | fl4.flowi4_proto = IPPROTO_UDP; | |
1863 | fl4.daddr = daddr; | |
1864 | fl4.saddr = vxlan->cfg.saddr.sin.sin_addr.s_addr; | |
1865 | ||
1866 | rt = ip_route_output_key(vxlan->net, &fl4); | |
0c1d70af | 1867 | if (!IS_ERR(rt)) { |
1a8496ba | 1868 | *saddr = fl4.saddr; |
0c1d70af PA |
1869 | if (use_cache) |
1870 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); | |
1871 | } | |
1a8496ba JB |
1872 | return rt; |
1873 | } | |
1874 | ||
e5d4b29f JB |
1875 | #if IS_ENABLED(CONFIG_IPV6) |
1876 | static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan, | |
1400615d | 1877 | struct sk_buff *skb, int oif, u8 tos, |
e7f70af1 | 1878 | __be32 label, |
e5d4b29f | 1879 | const struct in6_addr *daddr, |
0c1d70af | 1880 | struct in6_addr *saddr, |
db3c6139 DB |
1881 | struct dst_cache *dst_cache, |
1882 | const struct ip_tunnel_info *info) | |
e5d4b29f | 1883 | { |
db3c6139 | 1884 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e5d4b29f JB |
1885 | struct dst_entry *ndst; |
1886 | struct flowi6 fl6; | |
1887 | int err; | |
1888 | ||
1400615d DB |
1889 | if (tos && !info) |
1890 | use_cache = false; | |
db3c6139 | 1891 | if (use_cache) { |
0c1d70af PA |
1892 | ndst = dst_cache_get_ip6(dst_cache, saddr); |
1893 | if (ndst) | |
1894 | return ndst; | |
1895 | } | |
1896 | ||
e5d4b29f JB |
1897 | memset(&fl6, 0, sizeof(fl6)); |
1898 | fl6.flowi6_oif = oif; | |
1899 | fl6.daddr = *daddr; | |
1900 | fl6.saddr = vxlan->cfg.saddr.sin6.sin6_addr; | |
eaa93bf4 | 1901 | fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label); |
e5d4b29f JB |
1902 | fl6.flowi6_mark = skb->mark; |
1903 | fl6.flowi6_proto = IPPROTO_UDP; | |
1904 | ||
1905 | err = ipv6_stub->ipv6_dst_lookup(vxlan->net, | |
1906 | vxlan->vn6_sock->sock->sk, | |
1907 | &ndst, &fl6); | |
1908 | if (err < 0) | |
1909 | return ERR_PTR(err); | |
1910 | ||
1911 | *saddr = fl6.saddr; | |
db3c6139 | 1912 | if (use_cache) |
0c1d70af | 1913 | dst_cache_set_ip6(dst_cache, ndst, saddr); |
e5d4b29f JB |
1914 | return ndst; |
1915 | } | |
1916 | #endif | |
1917 | ||
9dcc71e1 SS |
1918 | /* Bypass encapsulation if the destination is local */ |
1919 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1920 | struct vxlan_dev *dst_vxlan) | |
1921 | { | |
8f84985f | 1922 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1923 | union vxlan_addr loopback; |
1924 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
1925 | struct net_device *dev = skb->dev; |
1926 | int len = skb->len; | |
9dcc71e1 | 1927 | |
8f84985f LR |
1928 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1929 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1930 | skb->pkt_type = PACKET_HOST; |
1931 | skb->encapsulation = 0; | |
1932 | skb->dev = dst_vxlan->dev; | |
1933 | __skb_pull(skb, skb_network_offset(skb)); | |
1934 | ||
e4c7ed41 CW |
1935 | if (remote_ip->sa.sa_family == AF_INET) { |
1936 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1937 | loopback.sa.sa_family = AF_INET; | |
1938 | #if IS_ENABLED(CONFIG_IPV6) | |
1939 | } else { | |
1940 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1941 | loopback.sa.sa_family = AF_INET6; | |
1942 | #endif | |
1943 | } | |
1944 | ||
9dcc71e1 | 1945 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1946 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1947 | |
1948 | u64_stats_update_begin(&tx_stats->syncp); | |
1949 | tx_stats->tx_packets++; | |
ce6502a8 | 1950 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
1951 | u64_stats_update_end(&tx_stats->syncp); |
1952 | ||
1953 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1954 | u64_stats_update_begin(&rx_stats->syncp); | |
1955 | rx_stats->rx_packets++; | |
ce6502a8 | 1956 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
1957 | u64_stats_update_end(&rx_stats->syncp); |
1958 | } else { | |
ce6502a8 | 1959 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
1960 | } |
1961 | } | |
1962 | ||
4ad16930 SH |
1963 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1964 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1965 | { |
d71785ff | 1966 | struct dst_cache *dst_cache; |
3093fbe7 | 1967 | struct ip_tunnel_info *info; |
d342894c | 1968 | struct vxlan_dev *vxlan = netdev_priv(dev); |
b1be00a6 | 1969 | struct sock *sk; |
e4c7ed41 | 1970 | struct rtable *rt = NULL; |
d342894c | 1971 | const struct iphdr *old_iph; |
e4c7ed41 | 1972 | union vxlan_addr *dst; |
ee122c79 TG |
1973 | union vxlan_addr remote_ip; |
1974 | struct vxlan_metadata _md; | |
1975 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 1976 | __be16 src_port = 0, dst_port; |
e7f70af1 | 1977 | __be32 vni, label; |
d342894c | 1978 | __be16 df = 0; |
1979 | __u8 tos, ttl; | |
0e6fbc5b | 1980 | int err; |
ee122c79 | 1981 | u32 flags = vxlan->flags; |
b4ed5cad | 1982 | bool udp_sum = false; |
f491e56d | 1983 | bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev)); |
d342894c | 1984 | |
61adedf3 | 1985 | info = skb_tunnel_info(skb); |
3093fbe7 | 1986 | |
ee122c79 | 1987 | if (rdst) { |
0dfbdf41 | 1988 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
ee122c79 TG |
1989 | vni = rdst->remote_vni; |
1990 | dst = &rdst->remote_ip; | |
d71785ff | 1991 | dst_cache = &rdst->dst_cache; |
ee122c79 TG |
1992 | } else { |
1993 | if (!info) { | |
1994 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
1995 | dev->name); | |
1996 | goto drop; | |
1997 | } | |
0dfbdf41 | 1998 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
54bfd872 | 1999 | vni = vxlan_tun_id_to_vni(info->key.tun_id); |
b1be00a6 JB |
2000 | remote_ip.sa.sa_family = ip_tunnel_info_af(info); |
2001 | if (remote_ip.sa.sa_family == AF_INET) | |
a725e514 JB |
2002 | remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; |
2003 | else | |
2004 | remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; | |
ee122c79 | 2005 | dst = &remote_ip; |
d71785ff | 2006 | dst_cache = &info->dst_cache; |
ee122c79 | 2007 | } |
e4f67add | 2008 | |
e4c7ed41 | 2009 | if (vxlan_addr_any(dst)) { |
e4f67add | 2010 | if (did_rsc) { |
e4f67add | 2011 | /* short-circuited back to local bridge */ |
9dcc71e1 | 2012 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 2013 | return; |
e4f67add | 2014 | } |
ef59febe | 2015 | goto drop; |
e4f67add | 2016 | } |
ef59febe | 2017 | |
d342894c | 2018 | old_iph = ip_hdr(skb); |
2019 | ||
0dfbdf41 | 2020 | ttl = vxlan->cfg.ttl; |
e4c7ed41 | 2021 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 2022 | ttl = 1; |
2023 | ||
0dfbdf41 | 2024 | tos = vxlan->cfg.tos; |
d342894c | 2025 | if (tos == 1) |
206aaafc | 2026 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 2027 | |
e7f70af1 | 2028 | label = vxlan->cfg.label; |
0dfbdf41 TG |
2029 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
2030 | vxlan->cfg.port_max, true); | |
d342894c | 2031 | |
a725e514 | 2032 | if (info) { |
a725e514 JB |
2033 | ttl = info->key.ttl; |
2034 | tos = info->key.tos; | |
e7f70af1 | 2035 | label = info->key.label; |
b4ed5cad | 2036 | udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
a725e514 JB |
2037 | |
2038 | if (info->options_len) | |
4c222798 | 2039 | md = ip_tunnel_info_opts(info); |
a725e514 JB |
2040 | } else { |
2041 | md->gbp = skb->mark; | |
2042 | } | |
2043 | ||
e4c7ed41 | 2044 | if (dst->sa.sa_family == AF_INET) { |
1a8496ba JB |
2045 | __be32 saddr; |
2046 | ||
b1be00a6 JB |
2047 | if (!vxlan->vn4_sock) |
2048 | goto drop; | |
2049 | sk = vxlan->vn4_sock->sock->sk; | |
2050 | ||
1a8496ba JB |
2051 | rt = vxlan_get_route(vxlan, skb, |
2052 | rdst ? rdst->remote_ifindex : 0, tos, | |
0c1d70af | 2053 | dst->sin.sin_addr.s_addr, &saddr, |
d71785ff | 2054 | dst_cache, info); |
e4c7ed41 CW |
2055 | if (IS_ERR(rt)) { |
2056 | netdev_dbg(dev, "no route to %pI4\n", | |
2057 | &dst->sin.sin_addr.s_addr); | |
2058 | dev->stats.tx_carrier_errors++; | |
2059 | goto tx_error; | |
2060 | } | |
d342894c | 2061 | |
e4c7ed41 CW |
2062 | if (rt->dst.dev == dev) { |
2063 | netdev_dbg(dev, "circular route to %pI4\n", | |
2064 | &dst->sin.sin_addr.s_addr); | |
2065 | dev->stats.collisions++; | |
fffc15a5 | 2066 | goto rt_tx_error; |
e4c7ed41 CW |
2067 | } |
2068 | ||
2069 | /* Bypass encapsulation if the destination is local */ | |
2070 | if (rt->rt_flags & RTCF_LOCAL && | |
2071 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
2072 | struct vxlan_dev *dst_vxlan; | |
2073 | ||
2074 | ip_rt_put(rt); | |
19ca9fc1 | 2075 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
2076 | dst->sa.sa_family, dst_port, |
2077 | vxlan->flags); | |
e4c7ed41 CW |
2078 | if (!dst_vxlan) |
2079 | goto tx_error; | |
2080 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
2081 | return; | |
2082 | } | |
2083 | ||
6ceb31ca AD |
2084 | if (!info) |
2085 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX); | |
2086 | else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) | |
2087 | df = htons(IP_DF); | |
2088 | ||
e4c7ed41 CW |
2089 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
2090 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
f491e56d | 2091 | err = vxlan_build_skb(skb, &rt->dst, sizeof(struct iphdr), |
54bfd872 | 2092 | vni, md, flags, udp_sum); |
f491e56d JB |
2093 | if (err < 0) |
2094 | goto xmit_tx_error; | |
2095 | ||
2096 | udp_tunnel_xmit_skb(rt, sk, skb, saddr, | |
2097 | dst->sin.sin_addr.s_addr, tos, ttl, df, | |
2098 | src_port, dst_port, xnet, !udp_sum); | |
e4c7ed41 CW |
2099 | #if IS_ENABLED(CONFIG_IPV6) |
2100 | } else { | |
e4c7ed41 | 2101 | struct dst_entry *ndst; |
e5d4b29f | 2102 | struct in6_addr saddr; |
6f264e47 | 2103 | u32 rt6i_flags; |
e4c7ed41 | 2104 | |
b1be00a6 JB |
2105 | if (!vxlan->vn6_sock) |
2106 | goto drop; | |
2107 | sk = vxlan->vn6_sock->sock->sk; | |
2108 | ||
e5d4b29f | 2109 | ndst = vxlan6_get_route(vxlan, skb, |
1400615d | 2110 | rdst ? rdst->remote_ifindex : 0, tos, |
e7f70af1 | 2111 | label, &dst->sin6.sin6_addr, &saddr, |
db3c6139 | 2112 | dst_cache, info); |
e5d4b29f | 2113 | if (IS_ERR(ndst)) { |
e4c7ed41 CW |
2114 | netdev_dbg(dev, "no route to %pI6\n", |
2115 | &dst->sin6.sin6_addr); | |
2116 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 2117 | goto tx_error; |
e4c7ed41 | 2118 | } |
d342894c | 2119 | |
e4c7ed41 CW |
2120 | if (ndst->dev == dev) { |
2121 | netdev_dbg(dev, "circular route to %pI6\n", | |
2122 | &dst->sin6.sin6_addr); | |
2123 | dst_release(ndst); | |
2124 | dev->stats.collisions++; | |
2125 | goto tx_error; | |
2126 | } | |
0e6fbc5b | 2127 | |
e4c7ed41 | 2128 | /* Bypass encapsulation if the destination is local */ |
6f264e47 JB |
2129 | rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; |
2130 | if (rt6i_flags & RTF_LOCAL && | |
2131 | !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
e4c7ed41 CW |
2132 | struct vxlan_dev *dst_vxlan; |
2133 | ||
2134 | dst_release(ndst); | |
19ca9fc1 | 2135 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
2136 | dst->sa.sa_family, dst_port, |
2137 | vxlan->flags); | |
e4c7ed41 CW |
2138 | if (!dst_vxlan) |
2139 | goto tx_error; | |
2140 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
2141 | return; | |
2142 | } | |
49560532 | 2143 | |
b4ed5cad JB |
2144 | if (!info) |
2145 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); | |
35e2d115 | 2146 | |
1400615d | 2147 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
e4c7ed41 | 2148 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
f491e56d JB |
2149 | skb_scrub_packet(skb, xnet); |
2150 | err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr), | |
54bfd872 | 2151 | vni, md, flags, udp_sum); |
f491e56d JB |
2152 | if (err < 0) { |
2153 | dst_release(ndst); | |
2154 | return; | |
2155 | } | |
2156 | udp_tunnel6_xmit_skb(ndst, sk, skb, dev, | |
e7f70af1 DB |
2157 | &saddr, &dst->sin6.sin6_addr, tos, ttl, |
2158 | label, src_port, dst_port, !udp_sum); | |
e4c7ed41 CW |
2159 | #endif |
2160 | } | |
0e6fbc5b | 2161 | |
4ad16930 | 2162 | return; |
d342894c | 2163 | |
2164 | drop: | |
2165 | dev->stats.tx_dropped++; | |
2166 | goto tx_free; | |
2167 | ||
f491e56d JB |
2168 | xmit_tx_error: |
2169 | /* skb is already freed. */ | |
2170 | skb = NULL; | |
49560532 PS |
2171 | rt_tx_error: |
2172 | ip_rt_put(rt); | |
d342894c | 2173 | tx_error: |
2174 | dev->stats.tx_errors++; | |
2175 | tx_free: | |
2176 | dev_kfree_skb(skb); | |
d342894c | 2177 | } |
2178 | ||
6681712d DS |
2179 | /* Transmit local packets over Vxlan |
2180 | * | |
2181 | * Outer IP header inherits ECN and DF from inner header. | |
2182 | * Outer UDP destination is the VXLAN assigned port. | |
2183 | * source port is based on hash of flow | |
2184 | */ | |
2185 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2186 | { | |
2187 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3093fbe7 | 2188 | const struct ip_tunnel_info *info; |
6681712d DS |
2189 | struct ethhdr *eth; |
2190 | bool did_rsc = false; | |
8f646c92 | 2191 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 2192 | struct vxlan_fdb *f; |
6681712d | 2193 | |
61adedf3 | 2194 | info = skb_tunnel_info(skb); |
3093fbe7 | 2195 | |
6681712d | 2196 | skb_reset_mac_header(skb); |
6681712d | 2197 | |
47e5d1b0 JB |
2198 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA) { |
2199 | if (info && info->mode & IP_TUNNEL_INFO_TX) | |
2200 | vxlan_xmit_one(skb, dev, NULL, false); | |
2201 | else | |
2202 | kfree_skb(skb); | |
2203 | return NETDEV_TX_OK; | |
2204 | } | |
2205 | ||
2206 | if (vxlan->flags & VXLAN_F_PROXY) { | |
2207 | eth = eth_hdr(skb); | |
f564f45c CW |
2208 | if (ntohs(eth->h_proto) == ETH_P_ARP) |
2209 | return arp_reduce(dev, skb); | |
2210 | #if IS_ENABLED(CONFIG_IPV6) | |
2211 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
91269e39 LR |
2212 | pskb_may_pull(skb, sizeof(struct ipv6hdr) |
2213 | + sizeof(struct nd_msg)) && | |
f564f45c CW |
2214 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { |
2215 | struct nd_msg *msg; | |
2216 | ||
2217 | msg = (struct nd_msg *)skb_transport_header(skb); | |
2218 | if (msg->icmph.icmp6_code == 0 && | |
2219 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
2220 | return neigh_reduce(dev, skb); | |
2221 | } | |
2222 | #endif | |
2223 | } | |
6681712d | 2224 | |
47e5d1b0 | 2225 | eth = eth_hdr(skb); |
6681712d | 2226 | f = vxlan_find_mac(vxlan, eth->h_dest); |
ae884082 DS |
2227 | did_rsc = false; |
2228 | ||
2229 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
2230 | (ntohs(eth->h_proto) == ETH_P_IP || |
2231 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2232 | did_rsc = route_shortcircuit(dev, skb); |
2233 | if (did_rsc) | |
2234 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
2235 | } | |
2236 | ||
6681712d | 2237 | if (f == NULL) { |
afbd8bae MR |
2238 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
2239 | if (f == NULL) { | |
2240 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
2241 | !is_multicast_ether_addr(eth->h_dest)) | |
2242 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2243 | ||
2244 | dev->stats.tx_dropped++; | |
8f646c92 | 2245 | kfree_skb(skb); |
afbd8bae MR |
2246 | return NETDEV_TX_OK; |
2247 | } | |
2248 | } | |
6681712d | 2249 | |
afbd8bae MR |
2250 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2251 | struct sk_buff *skb1; | |
6681712d | 2252 | |
8f646c92 ED |
2253 | if (!fdst) { |
2254 | fdst = rdst; | |
2255 | continue; | |
2256 | } | |
afbd8bae MR |
2257 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2258 | if (skb1) | |
2259 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
2260 | } |
2261 | ||
8f646c92 ED |
2262 | if (fdst) |
2263 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
2264 | else | |
2265 | kfree_skb(skb); | |
4ad16930 | 2266 | return NETDEV_TX_OK; |
6681712d DS |
2267 | } |
2268 | ||
d342894c | 2269 | /* Walk the forwarding table and purge stale entries */ |
2270 | static void vxlan_cleanup(unsigned long arg) | |
2271 | { | |
2272 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2273 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2274 | unsigned int h; | |
2275 | ||
2276 | if (!netif_running(vxlan->dev)) | |
2277 | return; | |
2278 | ||
d342894c | 2279 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2280 | struct hlist_node *p, *n; | |
14e1d0fa SD |
2281 | |
2282 | spin_lock_bh(&vxlan->hash_lock); | |
d342894c | 2283 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2284 | struct vxlan_fdb *f | |
2285 | = container_of(p, struct vxlan_fdb, hlist); | |
2286 | unsigned long timeout; | |
2287 | ||
3c172868 | 2288 | if (f->state & NUD_PERMANENT) |
d342894c | 2289 | continue; |
2290 | ||
0dfbdf41 | 2291 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2292 | if (time_before_eq(timeout, jiffies)) { |
2293 | netdev_dbg(vxlan->dev, | |
2294 | "garbage collect %pM\n", | |
2295 | f->eth_addr); | |
2296 | f->state = NUD_STALE; | |
2297 | vxlan_fdb_destroy(vxlan, f); | |
2298 | } else if (time_before(timeout, next_timer)) | |
2299 | next_timer = timeout; | |
2300 | } | |
14e1d0fa | 2301 | spin_unlock_bh(&vxlan->hash_lock); |
d342894c | 2302 | } |
d342894c | 2303 | |
2304 | mod_timer(&vxlan->age_timer, next_timer); | |
2305 | } | |
2306 | ||
9c2e24e1 PS |
2307 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2308 | { | |
56ef9c90 | 2309 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
54bfd872 | 2310 | __be32 vni = vxlan->default_dst.remote_vni; |
9c2e24e1 | 2311 | |
56ef9c90 | 2312 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 2313 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); |
56ef9c90 | 2314 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
2315 | } |
2316 | ||
d342894c | 2317 | /* Setup stats when device is created */ |
2318 | static int vxlan_init(struct net_device *dev) | |
2319 | { | |
1c213bd2 | 2320 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2321 | if (!dev->tstats) |
d342894c | 2322 | return -ENOMEM; |
2323 | ||
2324 | return 0; | |
2325 | } | |
2326 | ||
ba609e9b | 2327 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2328 | { |
2329 | struct vxlan_fdb *f; | |
2330 | ||
2331 | spin_lock_bh(&vxlan->hash_lock); | |
2332 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2333 | if (f) | |
2334 | vxlan_fdb_destroy(vxlan, f); | |
2335 | spin_unlock_bh(&vxlan->hash_lock); | |
2336 | } | |
2337 | ||
ebf4063e SH |
2338 | static void vxlan_uninit(struct net_device *dev) |
2339 | { | |
2340 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 2341 | |
ba609e9b | 2342 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2343 | |
ebf4063e SH |
2344 | free_percpu(dev->tstats); |
2345 | } | |
2346 | ||
d342894c | 2347 | /* Start ageing timer and join group when device is brought up */ |
2348 | static int vxlan_open(struct net_device *dev) | |
2349 | { | |
2350 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
205f356d | 2351 | int ret; |
56ef9c90 | 2352 | |
205f356d JB |
2353 | ret = vxlan_sock_add(vxlan); |
2354 | if (ret < 0) | |
2355 | return ret; | |
d342894c | 2356 | |
79d4a94f | 2357 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 | 2358 | ret = vxlan_igmp_join(vxlan); |
bef0057b MRL |
2359 | if (ret == -EADDRINUSE) |
2360 | ret = 0; | |
56ef9c90 | 2361 | if (ret) { |
205f356d | 2362 | vxlan_sock_release(vxlan); |
56ef9c90 MRL |
2363 | return ret; |
2364 | } | |
d342894c | 2365 | } |
2366 | ||
0dfbdf41 | 2367 | if (vxlan->cfg.age_interval) |
d342894c | 2368 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
2369 | ||
56ef9c90 | 2370 | return ret; |
d342894c | 2371 | } |
2372 | ||
2373 | /* Purge the forwarding table */ | |
2374 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2375 | { | |
31fec5aa | 2376 | unsigned int h; |
d342894c | 2377 | |
2378 | spin_lock_bh(&vxlan->hash_lock); | |
2379 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2380 | struct hlist_node *p, *n; | |
2381 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2382 | struct vxlan_fdb *f | |
2383 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2384 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2385 | if (!is_zero_ether_addr(f->eth_addr)) | |
2386 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2387 | } |
2388 | } | |
2389 | spin_unlock_bh(&vxlan->hash_lock); | |
2390 | } | |
2391 | ||
2392 | /* Cleanup timer and forwarding table on shutdown */ | |
2393 | static int vxlan_stop(struct net_device *dev) | |
2394 | { | |
2395 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2396 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
56ef9c90 | 2397 | int ret = 0; |
d342894c | 2398 | |
24c0e683 | 2399 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 2400 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 2401 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 2402 | |
2403 | del_timer_sync(&vxlan->age_timer); | |
2404 | ||
2405 | vxlan_flush(vxlan); | |
205f356d | 2406 | vxlan_sock_release(vxlan); |
d342894c | 2407 | |
56ef9c90 | 2408 | return ret; |
d342894c | 2409 | } |
2410 | ||
d342894c | 2411 | /* Stub, nothing needs to be done. */ |
2412 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2413 | { | |
2414 | } | |
2415 | ||
72564b59 DW |
2416 | static int __vxlan_change_mtu(struct net_device *dev, |
2417 | struct net_device *lowerdev, | |
2418 | struct vxlan_rdst *dst, int new_mtu, bool strict) | |
345010b5 | 2419 | { |
72564b59 | 2420 | int max_mtu = IP_MAX_MTU; |
345010b5 | 2421 | |
72564b59 DW |
2422 | if (lowerdev) |
2423 | max_mtu = lowerdev->mtu; | |
345010b5 DB |
2424 | |
2425 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
72564b59 | 2426 | max_mtu -= VXLAN6_HEADROOM; |
345010b5 | 2427 | else |
72564b59 | 2428 | max_mtu -= VXLAN_HEADROOM; |
345010b5 | 2429 | |
72564b59 | 2430 | if (new_mtu < 68) |
345010b5 DB |
2431 | return -EINVAL; |
2432 | ||
72564b59 DW |
2433 | if (new_mtu > max_mtu) { |
2434 | if (strict) | |
2435 | return -EINVAL; | |
2436 | ||
2437 | new_mtu = max_mtu; | |
2438 | } | |
2439 | ||
345010b5 DB |
2440 | dev->mtu = new_mtu; |
2441 | return 0; | |
2442 | } | |
2443 | ||
72564b59 DW |
2444 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2445 | { | |
2446 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2447 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2448 | struct net_device *lowerdev = __dev_get_by_index(vxlan->net, | |
2449 | dst->remote_ifindex); | |
2450 | return __vxlan_change_mtu(dev, lowerdev, dst, new_mtu, true); | |
2451 | } | |
2452 | ||
fc4099f1 PS |
2453 | static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
2454 | { | |
2455 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2456 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
2457 | __be16 sport, dport; | |
2458 | ||
2459 | sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, | |
2460 | vxlan->cfg.port_max, true); | |
2461 | dport = info->key.tp_dst ? : vxlan->cfg.dst_port; | |
2462 | ||
239e944f | 2463 | if (ip_tunnel_info_af(info) == AF_INET) { |
1a8496ba JB |
2464 | struct rtable *rt; |
2465 | ||
239e944f JB |
2466 | if (!vxlan->vn4_sock) |
2467 | return -EINVAL; | |
1a8496ba JB |
2468 | rt = vxlan_get_route(vxlan, skb, 0, info->key.tos, |
2469 | info->key.u.ipv4.dst, | |
0c1d70af | 2470 | &info->key.u.ipv4.src, NULL, info); |
1a8496ba JB |
2471 | if (IS_ERR(rt)) |
2472 | return PTR_ERR(rt); | |
2473 | ip_rt_put(rt); | |
239e944f JB |
2474 | } else { |
2475 | #if IS_ENABLED(CONFIG_IPV6) | |
2476 | struct dst_entry *ndst; | |
2477 | ||
2478 | if (!vxlan->vn6_sock) | |
2479 | return -EINVAL; | |
1400615d | 2480 | ndst = vxlan6_get_route(vxlan, skb, 0, info->key.tos, |
e7f70af1 | 2481 | info->key.label, &info->key.u.ipv6.dst, |
db3c6139 | 2482 | &info->key.u.ipv6.src, NULL, info); |
239e944f JB |
2483 | if (IS_ERR(ndst)) |
2484 | return PTR_ERR(ndst); | |
2485 | dst_release(ndst); | |
239e944f JB |
2486 | #else /* !CONFIG_IPV6 */ |
2487 | return -EPFNOSUPPORT; | |
2488 | #endif | |
2489 | } | |
1a8496ba JB |
2490 | info->key.tp_src = sport; |
2491 | info->key.tp_dst = dport; | |
239e944f | 2492 | return 0; |
fc4099f1 PS |
2493 | } |
2494 | ||
0c867c9b | 2495 | static const struct net_device_ops vxlan_netdev_ether_ops = { |
d342894c | 2496 | .ndo_init = vxlan_init, |
ebf4063e | 2497 | .ndo_uninit = vxlan_uninit, |
d342894c | 2498 | .ndo_open = vxlan_open, |
2499 | .ndo_stop = vxlan_stop, | |
2500 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2501 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2502 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2503 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2504 | .ndo_validate_addr = eth_validate_addr, |
2505 | .ndo_set_mac_address = eth_mac_addr, | |
2506 | .ndo_fdb_add = vxlan_fdb_add, | |
2507 | .ndo_fdb_del = vxlan_fdb_delete, | |
2508 | .ndo_fdb_dump = vxlan_fdb_dump, | |
fc4099f1 | 2509 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
d342894c | 2510 | }; |
2511 | ||
e1e5314d JB |
2512 | static const struct net_device_ops vxlan_netdev_raw_ops = { |
2513 | .ndo_init = vxlan_init, | |
2514 | .ndo_uninit = vxlan_uninit, | |
2515 | .ndo_open = vxlan_open, | |
2516 | .ndo_stop = vxlan_stop, | |
2517 | .ndo_start_xmit = vxlan_xmit, | |
2518 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
2519 | .ndo_change_mtu = vxlan_change_mtu, | |
2520 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, | |
2521 | }; | |
2522 | ||
d342894c | 2523 | /* Info for udev, that this is a virtual tunnel endpoint */ |
2524 | static struct device_type vxlan_type = { | |
2525 | .name = "vxlan", | |
2526 | }; | |
2527 | ||
53cf5275 | 2528 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2529 | * supply the listening VXLAN udp ports. Callers are expected |
2530 | * to implement the ndo_add_vxlan_port. | |
53cf5275 | 2531 | */ |
b7aade15 | 2532 | static void vxlan_push_rx_ports(struct net_device *dev) |
53cf5275 JG |
2533 | { |
2534 | struct vxlan_sock *vs; | |
2535 | struct net *net = dev_net(dev); | |
2536 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2537 | sa_family_t sa_family; | |
35e42379 JG |
2538 | __be16 port; |
2539 | unsigned int i; | |
53cf5275 | 2540 | |
b7aade15 HFS |
2541 | if (!dev->netdev_ops->ndo_add_vxlan_port) |
2542 | return; | |
2543 | ||
53cf5275 JG |
2544 | spin_lock(&vn->sock_lock); |
2545 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2546 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2547 | port = inet_sk(vs->sock->sk)->inet_sport; | |
705cc62f | 2548 | sa_family = vxlan_get_sk_family(vs); |
53cf5275 JG |
2549 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, |
2550 | port); | |
2551 | } | |
2552 | } | |
2553 | spin_unlock(&vn->sock_lock); | |
2554 | } | |
53cf5275 | 2555 | |
d342894c | 2556 | /* Initialize the device structure. */ |
2557 | static void vxlan_setup(struct net_device *dev) | |
2558 | { | |
2559 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2560 | unsigned int h; |
d342894c | 2561 | |
65226ef8 JB |
2562 | eth_hw_addr_random(dev); |
2563 | ether_setup(dev); | |
2564 | ||
ebf4063e | 2565 | dev->destructor = free_netdev; |
d342894c | 2566 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2567 | ||
d342894c | 2568 | dev->features |= NETIF_F_LLTX; |
d6727fe3 | 2569 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2570 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2571 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2572 | |
1eaa8178 PS |
2573 | dev->vlan_features = dev->features; |
2574 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2575 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2576 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2577 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
02875878 | 2578 | netif_keep_dst(dev); |
0c867c9b | 2579 | dev->priv_flags |= IFF_NO_QUEUE; |
d342894c | 2580 | |
553675fb | 2581 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2582 | spin_lock_init(&vxlan->hash_lock); |
2583 | ||
2584 | init_timer_deferrable(&vxlan->age_timer); | |
2585 | vxlan->age_timer.function = vxlan_cleanup; | |
2586 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2587 | ||
0dfbdf41 | 2588 | vxlan->cfg.dst_port = htons(vxlan_port); |
05f47d69 | 2589 | |
d342894c | 2590 | vxlan->dev = dev; |
2591 | ||
58ce31cc TH |
2592 | gro_cells_init(&vxlan->gro_cells, dev); |
2593 | ||
d342894c | 2594 | for (h = 0; h < FDB_HASH_SIZE; ++h) |
2595 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2596 | } | |
2597 | ||
0c867c9b JB |
2598 | static void vxlan_ether_setup(struct net_device *dev) |
2599 | { | |
0c867c9b JB |
2600 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
2601 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
2602 | dev->netdev_ops = &vxlan_netdev_ether_ops; | |
2603 | } | |
2604 | ||
e1e5314d JB |
2605 | static void vxlan_raw_setup(struct net_device *dev) |
2606 | { | |
65226ef8 | 2607 | dev->header_ops = NULL; |
e1e5314d JB |
2608 | dev->type = ARPHRD_NONE; |
2609 | dev->hard_header_len = 0; | |
2610 | dev->addr_len = 0; | |
e1e5314d JB |
2611 | dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; |
2612 | dev->netdev_ops = &vxlan_netdev_raw_ops; | |
2613 | } | |
2614 | ||
d342894c | 2615 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { |
2616 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2617 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2618 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2619 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2620 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2621 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2622 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2623 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
e7f70af1 | 2624 | [IFLA_VXLAN_LABEL] = { .type = NLA_U32 }, |
d342894c | 2625 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, |
2626 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2627 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2628 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2629 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2630 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2631 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2632 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
f8a9b1bc | 2633 | [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
823aa873 | 2634 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
2635 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
2636 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
2637 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
2638 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
2639 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 2640 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
e1e5314d | 2641 | [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, }, |
0ace2ca8 | 2642 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
d342894c | 2643 | }; |
2644 | ||
2645 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2646 | { | |
2647 | if (tb[IFLA_ADDRESS]) { | |
2648 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2649 | pr_debug("invalid link address (not ethernet)\n"); | |
2650 | return -EINVAL; | |
2651 | } | |
2652 | ||
2653 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2654 | pr_debug("invalid all zero ethernet address\n"); | |
2655 | return -EADDRNOTAVAIL; | |
2656 | } | |
2657 | } | |
2658 | ||
2659 | if (!data) | |
2660 | return -EINVAL; | |
2661 | ||
2662 | if (data[IFLA_VXLAN_ID]) { | |
2663 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2664 | if (id >= VXLAN_VID_MASK) | |
2665 | return -ERANGE; | |
2666 | } | |
2667 | ||
05f47d69 | 2668 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2669 | const struct ifla_vxlan_port_range *p | |
2670 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2671 | ||
2672 | if (ntohs(p->high) < ntohs(p->low)) { | |
2673 | pr_debug("port range %u .. %u not valid\n", | |
2674 | ntohs(p->low), ntohs(p->high)); | |
2675 | return -EINVAL; | |
2676 | } | |
2677 | } | |
2678 | ||
d342894c | 2679 | return 0; |
2680 | } | |
2681 | ||
1b13c97f YB |
2682 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2683 | struct ethtool_drvinfo *drvinfo) | |
2684 | { | |
2685 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2686 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2687 | } | |
2688 | ||
2689 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2690 | .get_drvinfo = vxlan_get_drvinfo, | |
2691 | .get_link = ethtool_op_get_link, | |
2692 | }; | |
2693 | ||
3ee64f39 TH |
2694 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2695 | __be16 port, u32 flags) | |
553675fb | 2696 | { |
e4c7ed41 | 2697 | struct socket *sock; |
3ee64f39 TH |
2698 | struct udp_port_cfg udp_conf; |
2699 | int err; | |
e4c7ed41 | 2700 | |
3ee64f39 | 2701 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2702 | |
3ee64f39 TH |
2703 | if (ipv6) { |
2704 | udp_conf.family = AF_INET6; | |
3ee64f39 | 2705 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 2706 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
a43a9ef6 | 2707 | udp_conf.ipv6_v6only = 1; |
3ee64f39 TH |
2708 | } else { |
2709 | udp_conf.family = AF_INET; | |
e4c7ed41 | 2710 | } |
e4c7ed41 | 2711 | |
3ee64f39 | 2712 | udp_conf.local_udp_port = port; |
553675fb | 2713 | |
3ee64f39 TH |
2714 | /* Open UDP socket */ |
2715 | err = udp_sock_create(net, &udp_conf, &sock); | |
2716 | if (err < 0) | |
2717 | return ERR_PTR(err); | |
e4c7ed41 | 2718 | |
39deb2c7 | 2719 | return sock; |
e4c7ed41 CW |
2720 | } |
2721 | ||
2722 | /* Create new listen socket if needed */ | |
b1be00a6 JB |
2723 | static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6, |
2724 | __be16 port, u32 flags) | |
e4c7ed41 CW |
2725 | { |
2726 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2727 | struct vxlan_sock *vs; | |
2728 | struct socket *sock; | |
e4c7ed41 | 2729 | unsigned int h; |
acbf74a7 | 2730 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 2731 | |
dc01e7d3 | 2732 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2733 | if (!vs) |
2734 | return ERR_PTR(-ENOMEM); | |
2735 | ||
2736 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2737 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2738 | ||
3ee64f39 | 2739 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 2740 | if (IS_ERR(sock)) { |
56ef9c90 MRL |
2741 | pr_info("Cannot bind port %d, err=%ld\n", ntohs(port), |
2742 | PTR_ERR(sock)); | |
553675fb | 2743 | kfree(vs); |
e50fddc8 | 2744 | return ERR_CAST(sock); |
553675fb | 2745 | } |
e4c7ed41 CW |
2746 | |
2747 | vs->sock = sock; | |
9c2e24e1 | 2748 | atomic_set(&vs->refcnt, 1); |
af33c1ad | 2749 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 2750 | |
9c2e24e1 PS |
2751 | spin_lock(&vn->sock_lock); |
2752 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2753 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2754 | spin_unlock(&vn->sock_lock); |
553675fb | 2755 | |
2756 | /* Mark socket as an encapsulation socket. */ | |
5602c48c | 2757 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
acbf74a7 AZ |
2758 | tunnel_cfg.sk_user_data = vs; |
2759 | tunnel_cfg.encap_type = 1; | |
f2d1968e | 2760 | tunnel_cfg.encap_rcv = vxlan_rcv; |
acbf74a7 | 2761 | tunnel_cfg.encap_destroy = NULL; |
5602c48c TH |
2762 | tunnel_cfg.gro_receive = vxlan_gro_receive; |
2763 | tunnel_cfg.gro_complete = vxlan_gro_complete; | |
acbf74a7 AZ |
2764 | |
2765 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 2766 | |
9c2e24e1 PS |
2767 | return vs; |
2768 | } | |
2769 | ||
b1be00a6 | 2770 | static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6) |
9c2e24e1 | 2771 | { |
205f356d JB |
2772 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
2773 | struct vxlan_sock *vs = NULL; | |
9c2e24e1 | 2774 | |
205f356d | 2775 | if (!vxlan->cfg.no_share) { |
56ef9c90 | 2776 | spin_lock(&vn->sock_lock); |
205f356d JB |
2777 | vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
2778 | vxlan->cfg.dst_port, vxlan->flags); | |
2779 | if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) { | |
56ef9c90 | 2780 | spin_unlock(&vn->sock_lock); |
205f356d | 2781 | return -EBUSY; |
56ef9c90 MRL |
2782 | } |
2783 | spin_unlock(&vn->sock_lock); | |
2784 | } | |
205f356d | 2785 | if (!vs) |
b1be00a6 JB |
2786 | vs = vxlan_socket_create(vxlan->net, ipv6, |
2787 | vxlan->cfg.dst_port, vxlan->flags); | |
205f356d JB |
2788 | if (IS_ERR(vs)) |
2789 | return PTR_ERR(vs); | |
b1be00a6 JB |
2790 | #if IS_ENABLED(CONFIG_IPV6) |
2791 | if (ipv6) | |
2792 | vxlan->vn6_sock = vs; | |
2793 | else | |
2794 | #endif | |
2795 | vxlan->vn4_sock = vs; | |
205f356d JB |
2796 | vxlan_vs_add_dev(vs, vxlan); |
2797 | return 0; | |
553675fb | 2798 | } |
2799 | ||
b1be00a6 JB |
2800 | static int vxlan_sock_add(struct vxlan_dev *vxlan) |
2801 | { | |
2802 | bool ipv6 = vxlan->flags & VXLAN_F_IPV6; | |
2803 | bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA; | |
2804 | int ret = 0; | |
2805 | ||
2806 | vxlan->vn4_sock = NULL; | |
2807 | #if IS_ENABLED(CONFIG_IPV6) | |
2808 | vxlan->vn6_sock = NULL; | |
2809 | if (ipv6 || metadata) | |
2810 | ret = __vxlan_sock_add(vxlan, true); | |
2811 | #endif | |
2812 | if (!ret && (!ipv6 || metadata)) | |
2813 | ret = __vxlan_sock_add(vxlan, false); | |
2814 | if (ret < 0) | |
2815 | vxlan_sock_release(vxlan); | |
2816 | return ret; | |
2817 | } | |
2818 | ||
0dfbdf41 TG |
2819 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
2820 | struct vxlan_config *conf) | |
d342894c | 2821 | { |
33564bbb | 2822 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
07b9b37c | 2823 | struct vxlan_dev *vxlan = netdev_priv(dev), *tmp; |
c7995c43 | 2824 | struct vxlan_rdst *dst = &vxlan->default_dst; |
b1be00a6 | 2825 | unsigned short needed_headroom = ETH_HLEN; |
d342894c | 2826 | int err; |
e4c7ed41 | 2827 | bool use_ipv6 = false; |
0dfbdf41 | 2828 | __be16 default_port = vxlan->cfg.dst_port; |
7e059158 | 2829 | struct net_device *lowerdev = NULL; |
d342894c | 2830 | |
e1e5314d JB |
2831 | if (conf->flags & VXLAN_F_GPE) { |
2832 | if (conf->flags & ~VXLAN_F_ALLOWED_GPE) | |
2833 | return -EINVAL; | |
2834 | /* For now, allow GPE only together with COLLECT_METADATA. | |
2835 | * This can be relaxed later; in such case, the other side | |
2836 | * of the PtP link will have to be provided. | |
2837 | */ | |
2838 | if (!(conf->flags & VXLAN_F_COLLECT_METADATA)) | |
2839 | return -EINVAL; | |
2840 | ||
2841 | vxlan_raw_setup(dev); | |
2842 | } else { | |
2843 | vxlan_ether_setup(dev); | |
2844 | } | |
0c867c9b | 2845 | |
33564bbb | 2846 | vxlan->net = src_net; |
f01ec1c0 | 2847 | |
0dfbdf41 | 2848 | dst->remote_vni = conf->vni; |
d342894c | 2849 | |
0dfbdf41 | 2850 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); |
d342894c | 2851 | |
0dfbdf41 TG |
2852 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2853 | if (!dst->remote_ip.sa.sa_family) | |
2854 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 | 2855 | |
0dfbdf41 | 2856 | if (dst->remote_ip.sa.sa_family == AF_INET6 || |
057ba29b JB |
2857 | vxlan->cfg.saddr.sa.sa_family == AF_INET6) { |
2858 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2859 | return -EPFNOSUPPORT; | |
e4c7ed41 | 2860 | use_ipv6 = true; |
b1be00a6 | 2861 | vxlan->flags |= VXLAN_F_IPV6; |
057ba29b | 2862 | } |
d342894c | 2863 | |
e7f70af1 DB |
2864 | if (conf->label && !use_ipv6) { |
2865 | pr_info("label only supported in use with IPv6\n"); | |
2866 | return -EINVAL; | |
2867 | } | |
2868 | ||
0dfbdf41 | 2869 | if (conf->remote_ifindex) { |
7e059158 | 2870 | lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex); |
0dfbdf41 | 2871 | dst->remote_ifindex = conf->remote_ifindex; |
34e02aa1 | 2872 | |
2873 | if (!lowerdev) { | |
c7995c43 | 2874 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2875 | return -ENODEV; |
2876 | } | |
d342894c | 2877 | |
e4c7ed41 CW |
2878 | #if IS_ENABLED(CONFIG_IPV6) |
2879 | if (use_ipv6) { | |
2880 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2881 | if (idev && idev->cnf.disable_ipv6) { | |
2882 | pr_info("IPv6 is disabled via sysctl\n"); | |
2883 | return -EPERM; | |
2884 | } | |
e4c7ed41 CW |
2885 | } |
2886 | #endif | |
2887 | ||
0dfbdf41 | 2888 | if (!conf->mtu) |
e4c7ed41 | 2889 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 | 2890 | |
b1be00a6 | 2891 | needed_headroom = lowerdev->hard_header_len; |
9dc2ad10 | 2892 | } |
d342894c | 2893 | |
7e059158 DW |
2894 | if (conf->mtu) { |
2895 | err = __vxlan_change_mtu(dev, lowerdev, dst, conf->mtu, false); | |
2896 | if (err) | |
2897 | return err; | |
2898 | } | |
2899 | ||
b1be00a6 JB |
2900 | if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) |
2901 | needed_headroom += VXLAN6_HEADROOM; | |
2902 | else | |
2903 | needed_headroom += VXLAN_HEADROOM; | |
2904 | dev->needed_headroom = needed_headroom; | |
2905 | ||
0dfbdf41 | 2906 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
e1e5314d JB |
2907 | if (!vxlan->cfg.dst_port) { |
2908 | if (conf->flags & VXLAN_F_GPE) | |
2909 | vxlan->cfg.dst_port = 4790; /* IANA assigned VXLAN-GPE port */ | |
2910 | else | |
2911 | vxlan->cfg.dst_port = default_port; | |
2912 | } | |
0dfbdf41 TG |
2913 | vxlan->flags |= conf->flags; |
2914 | ||
2915 | if (!vxlan->cfg.age_interval) | |
2916 | vxlan->cfg.age_interval = FDB_AGE_DEFAULT; | |
2917 | ||
07b9b37c ND |
2918 | list_for_each_entry(tmp, &vn->vxlan_list, next) { |
2919 | if (tmp->cfg.vni == conf->vni && | |
2920 | (tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 || | |
2921 | tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 && | |
2922 | tmp->cfg.dst_port == vxlan->cfg.dst_port && | |
2923 | (tmp->flags & VXLAN_F_RCV_FLAGS) == | |
2924 | (vxlan->flags & VXLAN_F_RCV_FLAGS)) | |
0dfbdf41 | 2925 | return -EEXIST; |
07b9b37c | 2926 | } |
0dfbdf41 TG |
2927 | |
2928 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
2929 | ||
2930 | /* create an fdb entry for a valid default destination */ | |
2931 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2932 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2933 | &vxlan->default_dst.remote_ip, | |
2934 | NUD_REACHABLE|NUD_PERMANENT, | |
2935 | NLM_F_EXCL|NLM_F_CREATE, | |
2936 | vxlan->cfg.dst_port, | |
2937 | vxlan->default_dst.remote_vni, | |
2938 | vxlan->default_dst.remote_ifindex, | |
2939 | NTF_SELF); | |
2940 | if (err) | |
2941 | return err; | |
2942 | } | |
2943 | ||
2944 | err = register_netdevice(dev); | |
2945 | if (err) { | |
2946 | vxlan_fdb_delete_default(vxlan); | |
2947 | return err; | |
2948 | } | |
2949 | ||
2950 | list_add(&vxlan->next, &vn->vxlan_list); | |
2951 | ||
2952 | return 0; | |
2953 | } | |
2954 | ||
2955 | struct net_device *vxlan_dev_create(struct net *net, const char *name, | |
2956 | u8 name_assign_type, struct vxlan_config *conf) | |
2957 | { | |
2958 | struct nlattr *tb[IFLA_MAX+1]; | |
2959 | struct net_device *dev; | |
2960 | int err; | |
2961 | ||
2962 | memset(&tb, 0, sizeof(tb)); | |
2963 | ||
2964 | dev = rtnl_create_link(net, name, name_assign_type, | |
2965 | &vxlan_link_ops, tb); | |
2966 | if (IS_ERR(dev)) | |
2967 | return dev; | |
2968 | ||
2969 | err = vxlan_dev_configure(net, dev, conf); | |
2970 | if (err < 0) { | |
2971 | free_netdev(dev); | |
2972 | return ERR_PTR(err); | |
2973 | } | |
2974 | ||
2975 | return dev; | |
2976 | } | |
2977 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
2978 | ||
2979 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
2980 | struct nlattr *tb[], struct nlattr *data[]) | |
2981 | { | |
2982 | struct vxlan_config conf; | |
2983 | int err; | |
2984 | ||
0dfbdf41 | 2985 | memset(&conf, 0, sizeof(conf)); |
e277de5f JG |
2986 | |
2987 | if (data[IFLA_VXLAN_ID]) | |
54bfd872 | 2988 | conf.vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); |
0dfbdf41 TG |
2989 | |
2990 | if (data[IFLA_VXLAN_GROUP]) { | |
2991 | conf.remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); | |
2992 | } else if (data[IFLA_VXLAN_GROUP6]) { | |
2993 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2994 | return -EPFNOSUPPORT; | |
2995 | ||
2996 | conf.remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); | |
2997 | conf.remote_ip.sa.sa_family = AF_INET6; | |
2998 | } | |
2999 | ||
3000 | if (data[IFLA_VXLAN_LOCAL]) { | |
3001 | conf.saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); | |
3002 | conf.saddr.sa.sa_family = AF_INET; | |
3003 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
3004 | if (!IS_ENABLED(CONFIG_IPV6)) | |
3005 | return -EPFNOSUPPORT; | |
3006 | ||
3007 | /* TODO: respect scope id */ | |
3008 | conf.saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); | |
3009 | conf.saddr.sa.sa_family = AF_INET6; | |
3010 | } | |
3011 | ||
3012 | if (data[IFLA_VXLAN_LINK]) | |
3013 | conf.remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); | |
3014 | ||
d342894c | 3015 | if (data[IFLA_VXLAN_TOS]) |
0dfbdf41 | 3016 | conf.tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 3017 | |
afb97186 | 3018 | if (data[IFLA_VXLAN_TTL]) |
0dfbdf41 | 3019 | conf.ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 3020 | |
e7f70af1 DB |
3021 | if (data[IFLA_VXLAN_LABEL]) |
3022 | conf.label = nla_get_be32(data[IFLA_VXLAN_LABEL]) & | |
3023 | IPV6_FLOWLABEL_MASK; | |
3024 | ||
d342894c | 3025 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
0dfbdf41 | 3026 | conf.flags |= VXLAN_F_LEARN; |
d342894c | 3027 | |
3028 | if (data[IFLA_VXLAN_AGEING]) | |
0dfbdf41 | 3029 | conf.age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); |
d342894c | 3030 | |
e4f67add | 3031 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
0dfbdf41 | 3032 | conf.flags |= VXLAN_F_PROXY; |
e4f67add DS |
3033 | |
3034 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
0dfbdf41 | 3035 | conf.flags |= VXLAN_F_RSC; |
e4f67add DS |
3036 | |
3037 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
0dfbdf41 | 3038 | conf.flags |= VXLAN_F_L2MISS; |
e4f67add DS |
3039 | |
3040 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
0dfbdf41 | 3041 | conf.flags |= VXLAN_F_L3MISS; |
e4f67add | 3042 | |
d342894c | 3043 | if (data[IFLA_VXLAN_LIMIT]) |
0dfbdf41 | 3044 | conf.addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); |
d342894c | 3045 | |
f8a9b1bc AS |
3046 | if (data[IFLA_VXLAN_COLLECT_METADATA] && |
3047 | nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA])) | |
3048 | conf.flags |= VXLAN_F_COLLECT_METADATA; | |
3049 | ||
05f47d69 | 3050 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
3051 | const struct ifla_vxlan_port_range *p | |
3052 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
0dfbdf41 TG |
3053 | conf.port_min = ntohs(p->low); |
3054 | conf.port_max = ntohs(p->high); | |
05f47d69 | 3055 | } |
3056 | ||
823aa873 | 3057 | if (data[IFLA_VXLAN_PORT]) |
0dfbdf41 | 3058 | conf.dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); |
823aa873 | 3059 | |
6ceb31ca AD |
3060 | if (data[IFLA_VXLAN_UDP_CSUM] && |
3061 | !nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) | |
3062 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM_TX; | |
359a0ea9 TH |
3063 | |
3064 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && | |
3065 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
0dfbdf41 | 3066 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; |
359a0ea9 TH |
3067 | |
3068 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && | |
3069 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
0dfbdf41 | 3070 | conf.flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; |
359a0ea9 | 3071 | |
dfd8645e TH |
3072 | if (data[IFLA_VXLAN_REMCSUM_TX] && |
3073 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
0dfbdf41 | 3074 | conf.flags |= VXLAN_F_REMCSUM_TX; |
dfd8645e TH |
3075 | |
3076 | if (data[IFLA_VXLAN_REMCSUM_RX] && | |
3077 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
0dfbdf41 | 3078 | conf.flags |= VXLAN_F_REMCSUM_RX; |
dfd8645e | 3079 | |
3511494c | 3080 | if (data[IFLA_VXLAN_GBP]) |
0dfbdf41 | 3081 | conf.flags |= VXLAN_F_GBP; |
3511494c | 3082 | |
e1e5314d JB |
3083 | if (data[IFLA_VXLAN_GPE]) |
3084 | conf.flags |= VXLAN_F_GPE; | |
3085 | ||
0ace2ca8 | 3086 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) |
0dfbdf41 | 3087 | conf.flags |= VXLAN_F_REMCSUM_NOPARTIAL; |
0ace2ca8 | 3088 | |
0dfbdf41 TG |
3089 | err = vxlan_dev_configure(src_net, dev, &conf); |
3090 | switch (err) { | |
3091 | case -ENODEV: | |
3092 | pr_info("ifindex %d does not exist\n", conf.remote_ifindex); | |
3093 | break; | |
1b13c97f | 3094 | |
0dfbdf41 TG |
3095 | case -EPERM: |
3096 | pr_info("IPv6 is disabled via sysctl\n"); | |
3097 | break; | |
d342894c | 3098 | |
0dfbdf41 | 3099 | case -EEXIST: |
54bfd872 | 3100 | pr_info("duplicate VNI %u\n", be32_to_cpu(conf.vni)); |
0dfbdf41 | 3101 | break; |
e1e5314d JB |
3102 | |
3103 | case -EINVAL: | |
3104 | pr_info("unsupported combination of extensions\n"); | |
3105 | break; | |
afbd8bae MR |
3106 | } |
3107 | ||
0dfbdf41 | 3108 | return err; |
d342894c | 3109 | } |
3110 | ||
3111 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
3112 | { | |
3113 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 3114 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 3115 | |
fe5c3561 | 3116 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
3117 | if (!hlist_unhashed(&vxlan->hlist)) |
3118 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 3119 | spin_unlock(&vn->sock_lock); |
3120 | ||
58ce31cc | 3121 | gro_cells_destroy(&vxlan->gro_cells); |
553675fb | 3122 | list_del(&vxlan->next); |
d342894c | 3123 | unregister_netdevice_queue(dev, head); |
3124 | } | |
3125 | ||
3126 | static size_t vxlan_get_size(const struct net_device *dev) | |
3127 | { | |
3128 | ||
3129 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 3130 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 3131 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 3132 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 3133 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
3134 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
e7f70af1 | 3135 | nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */ |
d342894c | 3136 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ |
e4f67add DS |
3137 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
3138 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
3139 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
3140 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
da8b43c0 | 3141 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
d342894c | 3142 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
3143 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 3144 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
3145 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
3146 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
3147 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
3148 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
3149 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
3150 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 3151 | 0; |
3152 | } | |
3153 | ||
3154 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
3155 | { | |
3156 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 3157 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 3158 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
3159 | .low = htons(vxlan->cfg.port_min), |
3160 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 3161 | }; |
d342894c | 3162 | |
54bfd872 | 3163 | if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni))) |
d342894c | 3164 | goto nla_put_failure; |
3165 | ||
e4c7ed41 CW |
3166 | if (!vxlan_addr_any(&dst->remote_ip)) { |
3167 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
3168 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
3169 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
3170 | goto nla_put_failure; |
3171 | #if IS_ENABLED(CONFIG_IPV6) | |
3172 | } else { | |
930345ea JB |
3173 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
3174 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
3175 | goto nla_put_failure; |
3176 | #endif | |
3177 | } | |
3178 | } | |
d342894c | 3179 | |
c7995c43 | 3180 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 3181 | goto nla_put_failure; |
3182 | ||
0dfbdf41 TG |
3183 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
3184 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 3185 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 3186 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
3187 | goto nla_put_failure; |
3188 | #if IS_ENABLED(CONFIG_IPV6) | |
3189 | } else { | |
930345ea | 3190 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 3191 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
3192 | goto nla_put_failure; |
3193 | #endif | |
3194 | } | |
3195 | } | |
d342894c | 3196 | |
0dfbdf41 TG |
3197 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
3198 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || | |
e7f70af1 | 3199 | nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) || |
e4f67add DS |
3200 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
3201 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
3202 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
3203 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
3204 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
3205 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
3206 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
3207 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
3208 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
da8b43c0 AS |
3209 | nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
3210 | !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) || | |
0dfbdf41 TG |
3211 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
3212 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
3213 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 | 3214 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
6ceb31ca | 3215 | !(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM_TX)) || |
359a0ea9 TH |
3216 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
3217 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
3218 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
dfd8645e TH |
3219 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
3220 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, | |
3221 | !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) || | |
3222 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, | |
3223 | !!(vxlan->flags & VXLAN_F_REMCSUM_RX))) | |
d342894c | 3224 | goto nla_put_failure; |
3225 | ||
05f47d69 | 3226 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
3227 | goto nla_put_failure; | |
3228 | ||
3511494c TG |
3229 | if (vxlan->flags & VXLAN_F_GBP && |
3230 | nla_put_flag(skb, IFLA_VXLAN_GBP)) | |
3231 | goto nla_put_failure; | |
3232 | ||
e1e5314d JB |
3233 | if (vxlan->flags & VXLAN_F_GPE && |
3234 | nla_put_flag(skb, IFLA_VXLAN_GPE)) | |
3235 | goto nla_put_failure; | |
3236 | ||
0ace2ca8 TH |
3237 | if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL && |
3238 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) | |
3239 | goto nla_put_failure; | |
3240 | ||
d342894c | 3241 | return 0; |
3242 | ||
3243 | nla_put_failure: | |
3244 | return -EMSGSIZE; | |
3245 | } | |
3246 | ||
1728d4fa ND |
3247 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
3248 | { | |
3249 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3250 | ||
3251 | return vxlan->net; | |
3252 | } | |
3253 | ||
d342894c | 3254 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
3255 | .kind = "vxlan", | |
3256 | .maxtype = IFLA_VXLAN_MAX, | |
3257 | .policy = vxlan_policy, | |
3258 | .priv_size = sizeof(struct vxlan_dev), | |
3259 | .setup = vxlan_setup, | |
3260 | .validate = vxlan_validate, | |
3261 | .newlink = vxlan_newlink, | |
3262 | .dellink = vxlan_dellink, | |
3263 | .get_size = vxlan_get_size, | |
3264 | .fill_info = vxlan_fill_info, | |
1728d4fa | 3265 | .get_link_net = vxlan_get_link_net, |
d342894c | 3266 | }; |
3267 | ||
acaf4e70 DB |
3268 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
3269 | struct net_device *dev) | |
3270 | { | |
3271 | struct vxlan_dev *vxlan, *next; | |
3272 | LIST_HEAD(list_kill); | |
3273 | ||
3274 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3275 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3276 | ||
3277 | /* In case we created vxlan device with carrier | |
3278 | * and we loose the carrier due to module unload | |
3279 | * we also need to remove vxlan device. In other | |
3280 | * cases, it's not necessary and remote_ifindex | |
3281 | * is 0 here, so no matches. | |
3282 | */ | |
3283 | if (dst->remote_ifindex == dev->ifindex) | |
3284 | vxlan_dellink(vxlan->dev, &list_kill); | |
3285 | } | |
3286 | ||
3287 | unregister_netdevice_many(&list_kill); | |
3288 | } | |
3289 | ||
b7aade15 HFS |
3290 | static int vxlan_netdevice_event(struct notifier_block *unused, |
3291 | unsigned long event, void *ptr) | |
acaf4e70 DB |
3292 | { |
3293 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 3294 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 3295 | |
783c1463 | 3296 | if (event == NETDEV_UNREGISTER) |
acaf4e70 | 3297 | vxlan_handle_lowerdev_unregister(vn, dev); |
b7aade15 HFS |
3298 | else if (event == NETDEV_OFFLOAD_PUSH_VXLAN) |
3299 | vxlan_push_rx_ports(dev); | |
acaf4e70 DB |
3300 | |
3301 | return NOTIFY_DONE; | |
3302 | } | |
3303 | ||
3304 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
b7aade15 | 3305 | .notifier_call = vxlan_netdevice_event, |
acaf4e70 DB |
3306 | }; |
3307 | ||
d342894c | 3308 | static __net_init int vxlan_init_net(struct net *net) |
3309 | { | |
3310 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 3311 | unsigned int h; |
d342894c | 3312 | |
553675fb | 3313 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 3314 | spin_lock_init(&vn->sock_lock); |
d342894c | 3315 | |
553675fb | 3316 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
3317 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 3318 | |
3319 | return 0; | |
3320 | } | |
3321 | ||
f01ec1c0 ND |
3322 | static void __net_exit vxlan_exit_net(struct net *net) |
3323 | { | |
3324 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3325 | struct vxlan_dev *vxlan, *next; | |
3326 | struct net_device *dev, *aux; | |
3327 | LIST_HEAD(list); | |
3328 | ||
3329 | rtnl_lock(); | |
3330 | for_each_netdev_safe(net, dev, aux) | |
3331 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
3332 | unregister_netdevice_queue(dev, &list); | |
3333 | ||
3334 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3335 | /* If vxlan->dev is in the same netns, it has already been added | |
3336 | * to the list by the previous loop. | |
3337 | */ | |
58ce31cc TH |
3338 | if (!net_eq(dev_net(vxlan->dev), net)) { |
3339 | gro_cells_destroy(&vxlan->gro_cells); | |
13c3ed6a | 3340 | unregister_netdevice_queue(vxlan->dev, &list); |
58ce31cc | 3341 | } |
f01ec1c0 ND |
3342 | } |
3343 | ||
3344 | unregister_netdevice_many(&list); | |
3345 | rtnl_unlock(); | |
3346 | } | |
3347 | ||
d342894c | 3348 | static struct pernet_operations vxlan_net_ops = { |
3349 | .init = vxlan_init_net, | |
f01ec1c0 | 3350 | .exit = vxlan_exit_net, |
d342894c | 3351 | .id = &vxlan_net_id, |
3352 | .size = sizeof(struct vxlan_net), | |
3353 | }; | |
3354 | ||
3355 | static int __init vxlan_init_module(void) | |
3356 | { | |
3357 | int rc; | |
3358 | ||
3359 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); | |
3360 | ||
783c1463 | 3361 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 3362 | if (rc) |
3363 | goto out1; | |
3364 | ||
acaf4e70 | 3365 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 3366 | if (rc) |
3367 | goto out2; | |
3368 | ||
acaf4e70 DB |
3369 | rc = rtnl_link_register(&vxlan_link_ops); |
3370 | if (rc) | |
3371 | goto out3; | |
d342894c | 3372 | |
acaf4e70 DB |
3373 | return 0; |
3374 | out3: | |
3375 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 3376 | out2: |
783c1463 | 3377 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 3378 | out1: |
3379 | return rc; | |
3380 | } | |
7332a13b | 3381 | late_initcall(vxlan_init_module); |
d342894c | 3382 | |
3383 | static void __exit vxlan_cleanup_module(void) | |
3384 | { | |
b7153984 | 3385 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 3386 | unregister_netdevice_notifier(&vxlan_notifier_block); |
783c1463 DB |
3387 | unregister_pernet_subsys(&vxlan_net_ops); |
3388 | /* rcu_barrier() is called by netns */ | |
d342894c | 3389 | } |
3390 | module_exit(vxlan_cleanup_module); | |
3391 | ||
3392 | MODULE_LICENSE("GPL"); | |
3393 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 3394 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 3395 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 3396 | MODULE_ALIAS_RTNL_LINK("vxlan"); |