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> |
acbf74a7 | 45 | #include <net/udp_tunnel.h> |
e4c7ed41 CW |
46 | #if IS_ENABLED(CONFIG_IPV6) |
47 | #include <net/ipv6.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/ip6_tunnel.h> | |
660d98ca | 50 | #include <net/ip6_checksum.h> |
e4c7ed41 | 51 | #endif |
d342894c | 52 | |
53 | #define VXLAN_VERSION "0.1" | |
54 | ||
553675fb | 55 | #define PORT_HASH_BITS 8 |
56 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 57 | #define VNI_HASH_BITS 10 |
58 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
59 | #define FDB_HASH_BITS 8 | |
60 | #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) | |
61 | #define FDB_AGE_DEFAULT 300 /* 5 min */ | |
62 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
63 | ||
23c578bf | 64 | /* UDP port for VXLAN traffic. |
65 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 66 | * for compatibility with early adopters. |
23c578bf | 67 | */ |
9daaa397 SH |
68 | static unsigned short vxlan_port __read_mostly = 8472; |
69 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 70 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
71 | ||
72 | static bool log_ecn_error = true; | |
73 | module_param(log_ecn_error, bool, 0644); | |
74 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
75 | ||
60d9d4c6 | 76 | static int vxlan_net_id; |
553675fb | 77 | |
afbd8bae MR |
78 | static const u8 all_zeros_mac[ETH_ALEN]; |
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 | ||
e4c7ed41 CW |
87 | union vxlan_addr { |
88 | struct sockaddr_in sin; | |
89 | struct sockaddr_in6 sin6; | |
90 | struct sockaddr sa; | |
91 | }; | |
92 | ||
6681712d | 93 | struct vxlan_rdst { |
e4c7ed41 | 94 | union vxlan_addr remote_ip; |
6681712d DS |
95 | __be16 remote_port; |
96 | u32 remote_vni; | |
97 | u32 remote_ifindex; | |
3e61aa8f | 98 | struct list_head list; |
bc7892ba | 99 | struct rcu_head rcu; |
6681712d DS |
100 | }; |
101 | ||
d342894c | 102 | /* Forwarding table entry */ |
103 | struct vxlan_fdb { | |
104 | struct hlist_node hlist; /* linked list of entries */ | |
105 | struct rcu_head rcu; | |
106 | unsigned long updated; /* jiffies */ | |
107 | unsigned long used; | |
3e61aa8f | 108 | struct list_head remotes; |
d342894c | 109 | u16 state; /* see ndm_state */ |
ae884082 | 110 | u8 flags; /* see ndm_flags */ |
d342894c | 111 | u8 eth_addr[ETH_ALEN]; |
112 | }; | |
113 | ||
d342894c | 114 | /* Pseudo network device */ |
115 | struct vxlan_dev { | |
553675fb | 116 | struct hlist_node hlist; /* vni hash table */ |
117 | struct list_head next; /* vxlan's per namespace list */ | |
118 | struct vxlan_sock *vn_sock; /* listening socket */ | |
d342894c | 119 | struct net_device *dev; |
f01ec1c0 | 120 | struct net *net; /* netns for packet i/o */ |
c7995c43 | 121 | struct vxlan_rdst default_dst; /* default destination */ |
e4c7ed41 | 122 | union vxlan_addr saddr; /* source address */ |
823aa873 | 123 | __be16 dst_port; |
05f47d69 | 124 | __u16 port_min; /* source port range */ |
125 | __u16 port_max; | |
d342894c | 126 | __u8 tos; /* TOS override */ |
127 | __u8 ttl; | |
359a0ea9 | 128 | u32 flags; /* VXLAN_F_* in vxlan.h */ |
d342894c | 129 | |
1c51a915 | 130 | struct work_struct sock_work; |
3fc2de2f | 131 | struct work_struct igmp_join; |
132 | struct work_struct igmp_leave; | |
1c51a915 | 133 | |
d342894c | 134 | unsigned long age_interval; |
135 | struct timer_list age_timer; | |
136 | spinlock_t hash_lock; | |
137 | unsigned int addrcnt; | |
138 | unsigned int addrmax; | |
d342894c | 139 | |
140 | struct hlist_head fdb_head[FDB_HASH_SIZE]; | |
141 | }; | |
142 | ||
143 | /* salt for hash table */ | |
144 | static u32 vxlan_salt __read_mostly; | |
758c57d1 | 145 | static struct workqueue_struct *vxlan_wq; |
d342894c | 146 | |
1c51a915 SH |
147 | static void vxlan_sock_work(struct work_struct *work); |
148 | ||
e4c7ed41 CW |
149 | #if IS_ENABLED(CONFIG_IPV6) |
150 | static inline | |
151 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
152 | { | |
153 | if (a->sa.sa_family != b->sa.sa_family) | |
154 | return false; | |
155 | if (a->sa.sa_family == AF_INET6) | |
156 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
157 | else | |
158 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
159 | } | |
160 | ||
161 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
162 | { | |
163 | if (ipa->sa.sa_family == AF_INET6) | |
164 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
165 | else | |
166 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
167 | } | |
168 | ||
169 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
170 | { | |
171 | if (ipa->sa.sa_family == AF_INET6) | |
172 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
173 | else | |
174 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
175 | } | |
176 | ||
177 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
178 | { | |
179 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
180 | nla_memcpy(&ip->sin6.sin6_addr, nla, sizeof(struct in6_addr)); | |
181 | ip->sa.sa_family = AF_INET6; | |
182 | return 0; | |
183 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
184 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
185 | ip->sa.sa_family = AF_INET; | |
186 | return 0; | |
187 | } else { | |
188 | return -EAFNOSUPPORT; | |
189 | } | |
190 | } | |
191 | ||
192 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
193 | const union vxlan_addr *ip) | |
194 | { | |
195 | if (ip->sa.sa_family == AF_INET6) | |
196 | return nla_put(skb, attr, sizeof(struct in6_addr), &ip->sin6.sin6_addr); | |
197 | else | |
198 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
199 | } | |
200 | ||
201 | #else /* !CONFIG_IPV6 */ | |
202 | ||
203 | static inline | |
204 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
205 | { | |
206 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
207 | } | |
208 | ||
209 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
210 | { | |
211 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
212 | } | |
213 | ||
214 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
215 | { | |
216 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
217 | } | |
218 | ||
219 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
220 | { | |
221 | if (nla_len(nla) >= sizeof(struct in6_addr)) { | |
222 | return -EAFNOSUPPORT; | |
223 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
224 | ip->sin.sin_addr.s_addr = nla_get_be32(nla); | |
225 | ip->sa.sa_family = AF_INET; | |
226 | return 0; | |
227 | } else { | |
228 | return -EAFNOSUPPORT; | |
229 | } | |
230 | } | |
231 | ||
232 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
233 | const union vxlan_addr *ip) | |
234 | { | |
235 | return nla_put_be32(skb, attr, ip->sin.sin_addr.s_addr); | |
236 | } | |
237 | #endif | |
238 | ||
553675fb | 239 | /* Virtual Network hash table head */ |
240 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, u32 id) | |
241 | { | |
242 | return &vs->vni_list[hash_32(id, VNI_HASH_BITS)]; | |
243 | } | |
244 | ||
245 | /* Socket hash table head */ | |
246 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 247 | { |
248 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
249 | ||
553675fb | 250 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
251 | } | |
252 | ||
3e61aa8f SH |
253 | /* First remote destination for a forwarding entry. |
254 | * Guaranteed to be non-NULL because remotes are never deleted. | |
255 | */ | |
5ca5461c | 256 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 257 | { |
5ca5461c | 258 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
259 | } | |
260 | ||
261 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
262 | { | |
263 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
264 | } |
265 | ||
ac5132d1 TG |
266 | /* Find VXLAN socket based on network namespace, address family and UDP port |
267 | * and enabled unshareable flags. | |
268 | */ | |
269 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
270 | __be16 port, u32 flags) | |
553675fb | 271 | { |
272 | struct vxlan_sock *vs; | |
af33c1ad TH |
273 | |
274 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 275 | |
276 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 277 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
ac5132d1 | 278 | inet_sk(vs->sock->sk)->sk.sk_family == family && |
af33c1ad | 279 | vs->flags == flags) |
553675fb | 280 | return vs; |
281 | } | |
282 | return NULL; | |
d342894c | 283 | } |
284 | ||
5cfccc5a | 285 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, u32 id) |
d342894c | 286 | { |
287 | struct vxlan_dev *vxlan; | |
d342894c | 288 | |
553675fb | 289 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, id), hlist) { |
c7995c43 | 290 | if (vxlan->default_dst.remote_vni == id) |
d342894c | 291 | return vxlan; |
292 | } | |
293 | ||
294 | return NULL; | |
295 | } | |
296 | ||
5cfccc5a | 297 | /* Look up VNI in a per net namespace table */ |
19ca9fc1 | 298 | static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, |
ac5132d1 TG |
299 | sa_family_t family, __be16 port, |
300 | u32 flags) | |
5cfccc5a PS |
301 | { |
302 | struct vxlan_sock *vs; | |
303 | ||
ac5132d1 | 304 | vs = vxlan_find_sock(net, family, port, flags); |
5cfccc5a PS |
305 | if (!vs) |
306 | return NULL; | |
307 | ||
308 | return vxlan_vs_find_vni(vs, id); | |
309 | } | |
310 | ||
d342894c | 311 | /* Fill in neighbour message in skbuff. */ |
312 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
313 | const struct vxlan_fdb *fdb, |
314 | u32 portid, u32 seq, int type, unsigned int flags, | |
315 | const struct vxlan_rdst *rdst) | |
d342894c | 316 | { |
317 | unsigned long now = jiffies; | |
318 | struct nda_cacheinfo ci; | |
319 | struct nlmsghdr *nlh; | |
320 | struct ndmsg *ndm; | |
e4f67add | 321 | bool send_ip, send_eth; |
d342894c | 322 | |
323 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
324 | if (nlh == NULL) | |
325 | return -EMSGSIZE; | |
326 | ||
327 | ndm = nlmsg_data(nlh); | |
328 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
329 | |
330 | send_eth = send_ip = true; | |
331 | ||
332 | if (type == RTM_GETNEIGH) { | |
333 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 334 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
335 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
336 | } else | |
337 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 338 | ndm->ndm_state = fdb->state; |
339 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 340 | ndm->ndm_flags = fdb->flags; |
545469f7 | 341 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 342 | |
193523bf | 343 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b ND |
344 | nla_put_s32(skb, NDA_LINK_NETNSID, |
345 | peernet2id(dev_net(vxlan->dev), vxlan->net))) | |
193523bf ND |
346 | goto nla_put_failure; |
347 | ||
e4f67add | 348 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 349 | goto nla_put_failure; |
350 | ||
e4c7ed41 | 351 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
352 | goto nla_put_failure; |
353 | ||
823aa873 | 354 | if (rdst->remote_port && rdst->remote_port != vxlan->dst_port && |
6681712d DS |
355 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
356 | goto nla_put_failure; | |
c7995c43 | 357 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
60d9d4c6 | 358 | nla_put_u32(skb, NDA_VNI, rdst->remote_vni)) |
6681712d DS |
359 | goto nla_put_failure; |
360 | if (rdst->remote_ifindex && | |
361 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 362 | goto nla_put_failure; |
363 | ||
364 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
365 | ci.ndm_confirmed = 0; | |
366 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
367 | ci.ndm_refcnt = 0; | |
368 | ||
369 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
370 | goto nla_put_failure; | |
371 | ||
053c095a JB |
372 | nlmsg_end(skb, nlh); |
373 | return 0; | |
d342894c | 374 | |
375 | nla_put_failure: | |
376 | nlmsg_cancel(skb, nlh); | |
377 | return -EMSGSIZE; | |
378 | } | |
379 | ||
380 | static inline size_t vxlan_nlmsg_size(void) | |
381 | { | |
382 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
383 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 384 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 385 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
386 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
387 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 388 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 389 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
390 | } | |
391 | ||
9e4b93f9 ND |
392 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
393 | struct vxlan_rdst *rd, int type) | |
d342894c | 394 | { |
395 | struct net *net = dev_net(vxlan->dev); | |
396 | struct sk_buff *skb; | |
397 | int err = -ENOBUFS; | |
398 | ||
399 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
400 | if (skb == NULL) | |
401 | goto errout; | |
402 | ||
9e4b93f9 | 403 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 404 | if (err < 0) { |
405 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
406 | WARN_ON(err == -EMSGSIZE); | |
407 | kfree_skb(skb); | |
408 | goto errout; | |
409 | } | |
410 | ||
411 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
412 | return; | |
413 | errout: | |
414 | if (err < 0) | |
415 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
416 | } | |
417 | ||
e4c7ed41 | 418 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
419 | { |
420 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
421 | struct vxlan_fdb f = { |
422 | .state = NUD_STALE, | |
423 | }; | |
424 | struct vxlan_rdst remote = { | |
e4c7ed41 | 425 | .remote_ip = *ipa, /* goes to NDA_DST */ |
bb3fd687 SH |
426 | .remote_vni = VXLAN_N_VID, |
427 | }; | |
3e61aa8f | 428 | |
9e4b93f9 | 429 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
430 | } |
431 | ||
432 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
433 | { | |
bb3fd687 SH |
434 | struct vxlan_fdb f = { |
435 | .state = NUD_STALE, | |
436 | }; | |
9e4b93f9 | 437 | struct vxlan_rdst remote = { }; |
e4f67add | 438 | |
e4f67add DS |
439 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
440 | ||
9e4b93f9 | 441 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
442 | } |
443 | ||
d342894c | 444 | /* Hash Ethernet address */ |
445 | static u32 eth_hash(const unsigned char *addr) | |
446 | { | |
447 | u64 value = get_unaligned((u64 *)addr); | |
448 | ||
449 | /* only want 6 bytes */ | |
450 | #ifdef __BIG_ENDIAN | |
d342894c | 451 | value >>= 16; |
321fb991 | 452 | #else |
453 | value <<= 16; | |
d342894c | 454 | #endif |
455 | return hash_64(value, FDB_HASH_BITS); | |
456 | } | |
457 | ||
458 | /* Hash chain to use given mac address */ | |
459 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
460 | const u8 *mac) | |
461 | { | |
462 | return &vxlan->fdb_head[eth_hash(mac)]; | |
463 | } | |
464 | ||
465 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 466 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
d342894c | 467 | const u8 *mac) |
d342894c | 468 | { |
469 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac); | |
470 | struct vxlan_fdb *f; | |
d342894c | 471 | |
b67bfe0d | 472 | hlist_for_each_entry_rcu(f, head, hlist) { |
7367d0b5 | 473 | if (ether_addr_equal(mac, f->eth_addr)) |
d342894c | 474 | return f; |
475 | } | |
476 | ||
477 | return NULL; | |
478 | } | |
479 | ||
014be2c8 SS |
480 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
481 | const u8 *mac) | |
482 | { | |
483 | struct vxlan_fdb *f; | |
484 | ||
485 | f = __vxlan_find_mac(vxlan, mac); | |
486 | if (f) | |
487 | f->used = jiffies; | |
488 | ||
489 | return f; | |
490 | } | |
491 | ||
a5e7c10a MR |
492 | /* caller should hold vxlan->hash_lock */ |
493 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 494 | union vxlan_addr *ip, __be16 port, |
a5e7c10a | 495 | __u32 vni, __u32 ifindex) |
6681712d | 496 | { |
3e61aa8f | 497 | struct vxlan_rdst *rd; |
6681712d | 498 | |
3e61aa8f | 499 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 500 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
501 | rd->remote_port == port && |
502 | rd->remote_vni == vni && | |
503 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 504 | return rd; |
6681712d | 505 | } |
3e61aa8f | 506 | |
a5e7c10a MR |
507 | return NULL; |
508 | } | |
509 | ||
906dc186 TR |
510 | /* Replace destination of unicast mac */ |
511 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
e4c7ed41 | 512 | union vxlan_addr *ip, __be16 port, __u32 vni, __u32 ifindex) |
906dc186 TR |
513 | { |
514 | struct vxlan_rdst *rd; | |
515 | ||
516 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
517 | if (rd) | |
518 | return 0; | |
519 | ||
520 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
521 | if (!rd) | |
522 | return 0; | |
e4c7ed41 | 523 | rd->remote_ip = *ip; |
906dc186 TR |
524 | rd->remote_port = port; |
525 | rd->remote_vni = vni; | |
526 | rd->remote_ifindex = ifindex; | |
527 | return 1; | |
528 | } | |
529 | ||
a5e7c10a MR |
530 | /* Add/update destinations for multicast */ |
531 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
9e4b93f9 ND |
532 | union vxlan_addr *ip, __be16 port, __u32 vni, |
533 | __u32 ifindex, struct vxlan_rdst **rdp) | |
a5e7c10a MR |
534 | { |
535 | struct vxlan_rdst *rd; | |
536 | ||
537 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
538 | if (rd) | |
539 | return 0; | |
540 | ||
6681712d DS |
541 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
542 | if (rd == NULL) | |
543 | return -ENOBUFS; | |
e4c7ed41 | 544 | rd->remote_ip = *ip; |
6681712d DS |
545 | rd->remote_port = port; |
546 | rd->remote_vni = vni; | |
547 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
548 | |
549 | list_add_tail_rcu(&rd->list, &f->remotes); | |
550 | ||
9e4b93f9 | 551 | *rdp = rd; |
6681712d DS |
552 | return 1; |
553 | } | |
554 | ||
dfd8645e TH |
555 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
556 | unsigned int off, | |
557 | struct vxlanhdr *vh, size_t hdrlen, | |
0ace2ca8 TH |
558 | u32 data, struct gro_remcsum *grc, |
559 | bool nopartial) | |
dfd8645e TH |
560 | { |
561 | size_t start, offset, plen; | |
dfd8645e TH |
562 | |
563 | if (skb->remcsum_offload) | |
26c4f7da | 564 | return NULL; |
dfd8645e TH |
565 | |
566 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
567 | return NULL; | |
568 | ||
569 | start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; | |
570 | offset = start + ((data & VXLAN_RCO_UDP) ? | |
571 | offsetof(struct udphdr, check) : | |
572 | offsetof(struct tcphdr, check)); | |
573 | ||
574 | plen = hdrlen + offset + sizeof(u16); | |
575 | ||
576 | /* Pull checksum that will be written */ | |
577 | if (skb_gro_header_hard(skb, off + plen)) { | |
578 | vh = skb_gro_header_slow(skb, off + plen, off); | |
579 | if (!vh) | |
580 | return NULL; | |
581 | } | |
582 | ||
26c4f7da | 583 | skb_gro_remcsum_process(skb, (void *)vh + hdrlen, |
0ace2ca8 | 584 | start, offset, grc, nopartial); |
dfd8645e TH |
585 | |
586 | skb->remcsum_offload = 1; | |
587 | ||
588 | return vh; | |
589 | } | |
590 | ||
a2b12f3c TH |
591 | static struct sk_buff **vxlan_gro_receive(struct sk_buff **head, |
592 | struct sk_buff *skb, | |
593 | struct udp_offload *uoff) | |
dc01e7d3 OG |
594 | { |
595 | struct sk_buff *p, **pp = NULL; | |
596 | struct vxlanhdr *vh, *vh2; | |
9b174d88 | 597 | unsigned int hlen, off_vx; |
dc01e7d3 | 598 | int flush = 1; |
dfd8645e TH |
599 | struct vxlan_sock *vs = container_of(uoff, struct vxlan_sock, |
600 | udp_offloads); | |
601 | u32 flags; | |
26c4f7da TH |
602 | struct gro_remcsum grc; |
603 | ||
604 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
605 | |
606 | off_vx = skb_gro_offset(skb); | |
607 | hlen = off_vx + sizeof(*vh); | |
608 | vh = skb_gro_header_fast(skb, off_vx); | |
609 | if (skb_gro_header_hard(skb, hlen)) { | |
610 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
611 | if (unlikely(!vh)) | |
612 | goto out; | |
613 | } | |
dc01e7d3 | 614 | |
dfd8645e TH |
615 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
616 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); | |
617 | ||
618 | flags = ntohl(vh->vx_flags); | |
619 | ||
620 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
621 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
0ace2ca8 TH |
622 | ntohl(vh->vx_vni), &grc, |
623 | !!(vs->flags & | |
624 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
625 | |
626 | if (!vh) | |
627 | goto out; | |
628 | } | |
629 | ||
dc01e7d3 OG |
630 | flush = 0; |
631 | ||
632 | for (p = *head; p; p = p->next) { | |
633 | if (!NAPI_GRO_CB(p)->same_flow) | |
634 | continue; | |
635 | ||
636 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
637 | if (vh->vx_flags != vh2->vx_flags || |
638 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
639 | NAPI_GRO_CB(p)->same_flow = 0; |
640 | continue; | |
641 | } | |
dc01e7d3 OG |
642 | } |
643 | ||
9b174d88 | 644 | pp = eth_gro_receive(head, skb); |
dc01e7d3 | 645 | |
dc01e7d3 | 646 | out: |
26c4f7da | 647 | skb_gro_remcsum_cleanup(skb, &grc); |
dc01e7d3 OG |
648 | NAPI_GRO_CB(skb)->flush |= flush; |
649 | ||
650 | return pp; | |
651 | } | |
652 | ||
a2b12f3c TH |
653 | static int vxlan_gro_complete(struct sk_buff *skb, int nhoff, |
654 | struct udp_offload *uoff) | |
dc01e7d3 | 655 | { |
cfdf1e1b JG |
656 | udp_tunnel_gro_complete(skb, nhoff); |
657 | ||
9b174d88 | 658 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
659 | } |
660 | ||
53cf5275 | 661 | /* Notify netdevs that UDP port started listening */ |
dc01e7d3 | 662 | static void vxlan_notify_add_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
663 | { |
664 | struct net_device *dev; | |
dc01e7d3 | 665 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
666 | struct net *net = sock_net(sk); |
667 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 668 | __be16 port = inet_sk(sk)->inet_sport; |
dc01e7d3 OG |
669 | int err; |
670 | ||
671 | if (sa_family == AF_INET) { | |
672 | err = udp_add_offload(&vs->udp_offloads); | |
673 | if (err) | |
674 | pr_warn("vxlan: udp_add_offload failed with status %d\n", err); | |
675 | } | |
53cf5275 JG |
676 | |
677 | rcu_read_lock(); | |
678 | for_each_netdev_rcu(net, dev) { | |
679 | if (dev->netdev_ops->ndo_add_vxlan_port) | |
680 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
681 | port); | |
682 | } | |
683 | rcu_read_unlock(); | |
684 | } | |
685 | ||
686 | /* Notify netdevs that UDP port is no more listening */ | |
dc01e7d3 | 687 | static void vxlan_notify_del_rx_port(struct vxlan_sock *vs) |
53cf5275 JG |
688 | { |
689 | struct net_device *dev; | |
dc01e7d3 | 690 | struct sock *sk = vs->sock->sk; |
53cf5275 JG |
691 | struct net *net = sock_net(sk); |
692 | sa_family_t sa_family = sk->sk_family; | |
35e42379 | 693 | __be16 port = inet_sk(sk)->inet_sport; |
53cf5275 JG |
694 | |
695 | rcu_read_lock(); | |
696 | for_each_netdev_rcu(net, dev) { | |
697 | if (dev->netdev_ops->ndo_del_vxlan_port) | |
698 | dev->netdev_ops->ndo_del_vxlan_port(dev, sa_family, | |
699 | port); | |
700 | } | |
701 | rcu_read_unlock(); | |
dc01e7d3 OG |
702 | |
703 | if (sa_family == AF_INET) | |
704 | udp_del_offload(&vs->udp_offloads); | |
53cf5275 JG |
705 | } |
706 | ||
d342894c | 707 | /* Add new entry to forwarding table -- assumes lock held */ |
708 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 709 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 710 | __u16 state, __u16 flags, |
73cf3317 | 711 | __be16 port, __u32 vni, __u32 ifindex, |
ae884082 | 712 | __u8 ndm_flags) |
d342894c | 713 | { |
9e4b93f9 | 714 | struct vxlan_rdst *rd = NULL; |
d342894c | 715 | struct vxlan_fdb *f; |
716 | int notify = 0; | |
717 | ||
014be2c8 | 718 | f = __vxlan_find_mac(vxlan, mac); |
d342894c | 719 | if (f) { |
720 | if (flags & NLM_F_EXCL) { | |
721 | netdev_dbg(vxlan->dev, | |
722 | "lost race to create %pM\n", mac); | |
723 | return -EEXIST; | |
724 | } | |
725 | if (f->state != state) { | |
726 | f->state = state; | |
727 | f->updated = jiffies; | |
728 | notify = 1; | |
729 | } | |
ae884082 DS |
730 | if (f->flags != ndm_flags) { |
731 | f->flags = ndm_flags; | |
732 | f->updated = jiffies; | |
733 | notify = 1; | |
734 | } | |
906dc186 TR |
735 | if ((flags & NLM_F_REPLACE)) { |
736 | /* Only change unicasts */ | |
737 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
738 | is_zero_ether_addr(f->eth_addr))) { | |
739 | int rc = vxlan_fdb_replace(f, ip, port, vni, | |
740 | ifindex); | |
741 | ||
742 | if (rc < 0) | |
743 | return rc; | |
744 | notify |= rc; | |
745 | } else | |
746 | return -EOPNOTSUPP; | |
747 | } | |
6681712d | 748 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
749 | (is_multicast_ether_addr(f->eth_addr) || |
750 | is_zero_ether_addr(f->eth_addr))) { | |
9e4b93f9 ND |
751 | int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, |
752 | &rd); | |
6681712d DS |
753 | |
754 | if (rc < 0) | |
755 | return rc; | |
756 | notify |= rc; | |
757 | } | |
d342894c | 758 | } else { |
759 | if (!(flags & NLM_F_CREATE)) | |
760 | return -ENOENT; | |
761 | ||
762 | if (vxlan->addrmax && vxlan->addrcnt >= vxlan->addrmax) | |
763 | return -ENOSPC; | |
764 | ||
906dc186 TR |
765 | /* Disallow replace to add a multicast entry */ |
766 | if ((flags & NLM_F_REPLACE) && | |
767 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
768 | return -EOPNOTSUPP; | |
769 | ||
e4c7ed41 | 770 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 771 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
772 | if (!f) | |
773 | return -ENOMEM; | |
774 | ||
775 | notify = 1; | |
d342894c | 776 | f->state = state; |
ae884082 | 777 | f->flags = ndm_flags; |
d342894c | 778 | f->updated = f->used = jiffies; |
3e61aa8f | 779 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 780 | memcpy(f->eth_addr, mac, ETH_ALEN); |
781 | ||
9e4b93f9 | 782 | vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
3e61aa8f | 783 | |
d342894c | 784 | ++vxlan->addrcnt; |
785 | hlist_add_head_rcu(&f->hlist, | |
786 | vxlan_fdb_head(vxlan, mac)); | |
787 | } | |
788 | ||
9e4b93f9 ND |
789 | if (notify) { |
790 | if (rd == NULL) | |
791 | rd = first_remote_rtnl(f); | |
792 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
793 | } | |
d342894c | 794 | |
795 | return 0; | |
796 | } | |
797 | ||
6706c82e | 798 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
799 | { |
800 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 801 | struct vxlan_rdst *rd, *nd; |
6681712d | 802 | |
3e61aa8f | 803 | list_for_each_entry_safe(rd, nd, &f->remotes, list) |
6681712d | 804 | kfree(rd); |
6681712d DS |
805 | kfree(f); |
806 | } | |
807 | ||
d342894c | 808 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
809 | { | |
810 | netdev_dbg(vxlan->dev, | |
811 | "delete %pM\n", f->eth_addr); | |
812 | ||
813 | --vxlan->addrcnt; | |
9e4b93f9 | 814 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 815 | |
816 | hlist_del_rcu(&f->hlist); | |
6681712d | 817 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 818 | } |
819 | ||
f0b074be | 820 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
e4c7ed41 | 821 | union vxlan_addr *ip, __be16 *port, u32 *vni, u32 *ifindex) |
d342894c | 822 | { |
6681712d | 823 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 824 | int err; |
d342894c | 825 | |
f0b074be | 826 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
827 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
828 | if (err) | |
829 | return err; | |
f0b074be | 830 | } else { |
e4c7ed41 CW |
831 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
832 | if (remote->sa.sa_family == AF_INET) { | |
833 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
834 | ip->sa.sa_family = AF_INET; | |
835 | #if IS_ENABLED(CONFIG_IPV6) | |
836 | } else { | |
837 | ip->sin6.sin6_addr = in6addr_any; | |
838 | ip->sa.sa_family = AF_INET6; | |
839 | #endif | |
840 | } | |
f0b074be | 841 | } |
d342894c | 842 | |
6681712d | 843 | if (tb[NDA_PORT]) { |
73cf3317 | 844 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 845 | return -EINVAL; |
f0b074be MR |
846 | *port = nla_get_be16(tb[NDA_PORT]); |
847 | } else { | |
848 | *port = vxlan->dst_port; | |
849 | } | |
6681712d DS |
850 | |
851 | if (tb[NDA_VNI]) { | |
852 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
853 | return -EINVAL; | |
f0b074be MR |
854 | *vni = nla_get_u32(tb[NDA_VNI]); |
855 | } else { | |
856 | *vni = vxlan->default_dst.remote_vni; | |
857 | } | |
6681712d DS |
858 | |
859 | if (tb[NDA_IFINDEX]) { | |
5abb0029 | 860 | struct net_device *tdev; |
6681712d DS |
861 | |
862 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
863 | return -EINVAL; | |
f0b074be | 864 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 865 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 866 | if (!tdev) |
6681712d | 867 | return -EADDRNOTAVAIL; |
f0b074be MR |
868 | } else { |
869 | *ifindex = 0; | |
870 | } | |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
875 | /* Add static entry (via netlink) */ | |
876 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
877 | struct net_device *dev, | |
f6f6424b | 878 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
879 | { |
880 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
881 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 882 | union vxlan_addr ip; |
f0b074be MR |
883 | __be16 port; |
884 | u32 vni, ifindex; | |
885 | int err; | |
886 | ||
887 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
888 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
889 | ndm->ndm_state); | |
890 | return -EINVAL; | |
891 | } | |
892 | ||
893 | if (tb[NDA_DST] == NULL) | |
894 | return -EINVAL; | |
895 | ||
896 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
897 | if (err) | |
898 | return err; | |
6681712d | 899 | |
5933a7bb MR |
900 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
901 | return -EAFNOSUPPORT; | |
902 | ||
d342894c | 903 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 904 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
73cf3317 | 905 | port, vni, ifindex, ndm->ndm_flags); |
d342894c | 906 | spin_unlock_bh(&vxlan->hash_lock); |
907 | ||
908 | return err; | |
909 | } | |
910 | ||
911 | /* Delete entry (via netlink) */ | |
1690be63 VY |
912 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
913 | struct net_device *dev, | |
f6f6424b | 914 | const unsigned char *addr, u16 vid) |
d342894c | 915 | { |
916 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
917 | struct vxlan_fdb *f; | |
bc7892ba | 918 | struct vxlan_rdst *rd = NULL; |
e4c7ed41 | 919 | union vxlan_addr ip; |
bc7892ba MR |
920 | __be16 port; |
921 | u32 vni, ifindex; | |
922 | int err; | |
923 | ||
924 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); | |
925 | if (err) | |
926 | return err; | |
927 | ||
928 | err = -ENOENT; | |
d342894c | 929 | |
930 | spin_lock_bh(&vxlan->hash_lock); | |
931 | f = vxlan_find_mac(vxlan, addr); | |
bc7892ba MR |
932 | if (!f) |
933 | goto out; | |
934 | ||
e4c7ed41 CW |
935 | if (!vxlan_addr_any(&ip)) { |
936 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
937 | if (!rd) |
938 | goto out; | |
939 | } | |
940 | ||
941 | err = 0; | |
942 | ||
943 | /* remove a destination if it's not the only one on the list, | |
944 | * otherwise destroy the fdb entry | |
945 | */ | |
946 | if (rd && !list_is_singular(&f->remotes)) { | |
947 | list_del_rcu(&rd->list); | |
9e4b93f9 | 948 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 949 | kfree_rcu(rd, rcu); |
bc7892ba | 950 | goto out; |
d342894c | 951 | } |
bc7892ba MR |
952 | |
953 | vxlan_fdb_destroy(vxlan, f); | |
954 | ||
955 | out: | |
d342894c | 956 | spin_unlock_bh(&vxlan->hash_lock); |
957 | ||
958 | return err; | |
959 | } | |
960 | ||
961 | /* Dump forwarding table */ | |
962 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 JHS |
963 | struct net_device *dev, |
964 | struct net_device *filter_dev, int idx) | |
d342894c | 965 | { |
966 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
967 | unsigned int h; | |
968 | ||
969 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
970 | struct vxlan_fdb *f; | |
d342894c | 971 | int err; |
972 | ||
b67bfe0d | 973 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 974 | struct vxlan_rdst *rd; |
6681712d | 975 | |
3e61aa8f SH |
976 | if (idx < cb->args[0]) |
977 | goto skip; | |
978 | ||
979 | list_for_each_entry_rcu(rd, &f->remotes, list) { | |
6681712d DS |
980 | err = vxlan_fdb_info(skb, vxlan, f, |
981 | NETLINK_CB(cb->skb).portid, | |
982 | cb->nlh->nlmsg_seq, | |
983 | RTM_NEWNEIGH, | |
984 | NLM_F_MULTI, rd); | |
985 | if (err < 0) | |
3e61aa8f | 986 | goto out; |
6681712d | 987 | } |
3e61aa8f SH |
988 | skip: |
989 | ++idx; | |
d342894c | 990 | } |
991 | } | |
3e61aa8f | 992 | out: |
d342894c | 993 | return idx; |
994 | } | |
995 | ||
996 | /* Watch incoming packets to learn mapping between Ethernet address | |
997 | * and Tunnel endpoint. | |
26a41ae6 | 998 | * Return true if packet is bogus and should be droppped. |
d342894c | 999 | */ |
26a41ae6 | 1000 | static bool vxlan_snoop(struct net_device *dev, |
e4c7ed41 | 1001 | union vxlan_addr *src_ip, const u8 *src_mac) |
d342894c | 1002 | { |
1003 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1004 | struct vxlan_fdb *f; | |
d342894c | 1005 | |
1006 | f = vxlan_find_mac(vxlan, src_mac); | |
1007 | if (likely(f)) { | |
5ca5461c | 1008 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 1009 | |
e4c7ed41 | 1010 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 1011 | return false; |
1012 | ||
1013 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 1014 | if (f->state & NUD_NOARP) |
26a41ae6 | 1015 | return true; |
d342894c | 1016 | |
1017 | if (net_ratelimit()) | |
1018 | netdev_info(dev, | |
e4c7ed41 | 1019 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 1020 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 1021 | |
e4c7ed41 | 1022 | rdst->remote_ip = *src_ip; |
d342894c | 1023 | f->updated = jiffies; |
9e4b93f9 | 1024 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 1025 | } else { |
1026 | /* learned new entry */ | |
1027 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 1028 | |
1029 | /* close off race between vxlan_flush and incoming packets */ | |
1030 | if (netif_running(dev)) | |
1031 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
1032 | NUD_REACHABLE, | |
1033 | NLM_F_EXCL|NLM_F_CREATE, | |
1034 | vxlan->dst_port, | |
1035 | vxlan->default_dst.remote_vni, | |
1036 | 0, NTF_SELF); | |
d342894c | 1037 | spin_unlock(&vxlan->hash_lock); |
1038 | } | |
26a41ae6 | 1039 | |
1040 | return false; | |
d342894c | 1041 | } |
1042 | ||
d342894c | 1043 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1044 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1045 | { |
553675fb | 1046 | struct vxlan_dev *vxlan; |
d342894c | 1047 | |
95ab0991 G |
1048 | /* The vxlan_sock is only used by dev, leaving group has |
1049 | * no effect on other vxlan devices. | |
1050 | */ | |
1051 | if (atomic_read(&dev->vn_sock->refcnt) == 1) | |
1052 | return false; | |
1053 | ||
553675fb | 1054 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1055 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1056 | continue; |
d342894c | 1057 | |
95ab0991 G |
1058 | if (vxlan->vn_sock != dev->vn_sock) |
1059 | continue; | |
1060 | ||
1061 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1062 | &dev->default_dst.remote_ip)) | |
1063 | continue; | |
1064 | ||
1065 | if (vxlan->default_dst.remote_ifindex != | |
1066 | dev->default_dst.remote_ifindex) | |
1067 | continue; | |
1068 | ||
1069 | return true; | |
553675fb | 1070 | } |
d342894c | 1071 | |
1072 | return false; | |
1073 | } | |
1074 | ||
7c47cedf | 1075 | static void vxlan_sock_hold(struct vxlan_sock *vs) |
d342894c | 1076 | { |
7c47cedf SH |
1077 | atomic_inc(&vs->refcnt); |
1078 | } | |
d342894c | 1079 | |
012a5729 | 1080 | void vxlan_sock_release(struct vxlan_sock *vs) |
7c47cedf | 1081 | { |
53cf5275 JG |
1082 | struct sock *sk = vs->sock->sk; |
1083 | struct net *net = sock_net(sk); | |
1084 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
012a5729 | 1085 | |
7c47cedf SH |
1086 | if (!atomic_dec_and_test(&vs->refcnt)) |
1087 | return; | |
d342894c | 1088 | |
1c51a915 | 1089 | spin_lock(&vn->sock_lock); |
7c47cedf | 1090 | hlist_del_rcu(&vs->hlist); |
dc01e7d3 | 1091 | vxlan_notify_del_rx_port(vs); |
1c51a915 SH |
1092 | spin_unlock(&vn->sock_lock); |
1093 | ||
7c47cedf | 1094 | queue_work(vxlan_wq, &vs->del_work); |
d342894c | 1095 | } |
012a5729 | 1096 | EXPORT_SYMBOL_GPL(vxlan_sock_release); |
d342894c | 1097 | |
3fc2de2f | 1098 | /* Callback to update multicast group membership when first VNI on |
1099 | * multicast asddress is brought up | |
7c47cedf | 1100 | */ |
3fc2de2f | 1101 | static void vxlan_igmp_join(struct work_struct *work) |
d342894c | 1102 | { |
3fc2de2f | 1103 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_join); |
7c47cedf SH |
1104 | struct vxlan_sock *vs = vxlan->vn_sock; |
1105 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1106 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1107 | int ifindex = vxlan->default_dst.remote_ifindex; | |
d342894c | 1108 | |
54ff9ef3 | 1109 | rtnl_lock(); |
d342894c | 1110 | lock_sock(sk); |
e4c7ed41 CW |
1111 | if (ip->sa.sa_family == AF_INET) { |
1112 | struct ip_mreqn mreq = { | |
1113 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1114 | .imr_ifindex = ifindex, | |
1115 | }; | |
1116 | ||
1117 | ip_mc_join_group(sk, &mreq); | |
1118 | #if IS_ENABLED(CONFIG_IPV6) | |
1119 | } else { | |
1120 | ipv6_stub->ipv6_sock_mc_join(sk, ifindex, | |
1121 | &ip->sin6.sin6_addr); | |
1122 | #endif | |
1123 | } | |
3fc2de2f | 1124 | release_sock(sk); |
54ff9ef3 | 1125 | rtnl_unlock(); |
3fc2de2f | 1126 | |
012a5729 | 1127 | vxlan_sock_release(vs); |
3fc2de2f | 1128 | dev_put(vxlan->dev); |
1129 | } | |
1130 | ||
1131 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
1132 | static void vxlan_igmp_leave(struct work_struct *work) | |
1133 | { | |
1134 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, igmp_leave); | |
3fc2de2f | 1135 | struct vxlan_sock *vs = vxlan->vn_sock; |
1136 | struct sock *sk = vs->sock->sk; | |
e4c7ed41 CW |
1137 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1138 | int ifindex = vxlan->default_dst.remote_ifindex; | |
3fc2de2f | 1139 | |
54ff9ef3 | 1140 | rtnl_lock(); |
3fc2de2f | 1141 | lock_sock(sk); |
e4c7ed41 CW |
1142 | if (ip->sa.sa_family == AF_INET) { |
1143 | struct ip_mreqn mreq = { | |
1144 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1145 | .imr_ifindex = ifindex, | |
1146 | }; | |
1147 | ||
1148 | ip_mc_leave_group(sk, &mreq); | |
1149 | #if IS_ENABLED(CONFIG_IPV6) | |
1150 | } else { | |
1151 | ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, | |
1152 | &ip->sin6.sin6_addr); | |
1153 | #endif | |
1154 | } | |
1155 | ||
d342894c | 1156 | release_sock(sk); |
54ff9ef3 | 1157 | rtnl_unlock(); |
d342894c | 1158 | |
012a5729 | 1159 | vxlan_sock_release(vs); |
7c47cedf | 1160 | dev_put(vxlan->dev); |
d342894c | 1161 | } |
1162 | ||
dfd8645e | 1163 | static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh, |
0ace2ca8 | 1164 | size_t hdrlen, u32 data, bool nopartial) |
dfd8645e TH |
1165 | { |
1166 | size_t start, offset, plen; | |
dfd8645e | 1167 | |
dfd8645e TH |
1168 | start = (data & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; |
1169 | offset = start + ((data & VXLAN_RCO_UDP) ? | |
1170 | offsetof(struct udphdr, check) : | |
1171 | offsetof(struct tcphdr, check)); | |
1172 | ||
1173 | plen = hdrlen + offset + sizeof(u16); | |
1174 | ||
1175 | if (!pskb_may_pull(skb, plen)) | |
1176 | return NULL; | |
1177 | ||
1178 | vh = (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
1179 | ||
0ace2ca8 TH |
1180 | skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset, |
1181 | nopartial); | |
dfd8645e TH |
1182 | |
1183 | return vh; | |
1184 | } | |
1185 | ||
d342894c | 1186 | /* Callback from net/ipv4/udp.c to receive packets */ |
1187 | static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
1188 | { | |
5cfccc5a | 1189 | struct vxlan_sock *vs; |
d342894c | 1190 | struct vxlanhdr *vxh; |
3bf39475 | 1191 | u32 flags, vni; |
3511494c | 1192 | struct vxlan_metadata md = {0}; |
d342894c | 1193 | |
d342894c | 1194 | /* Need Vxlan and inner Ethernet header to be present */ |
7ce04758 | 1195 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
d342894c | 1196 | goto error; |
1197 | ||
7ce04758 | 1198 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); |
3bf39475 TH |
1199 | flags = ntohl(vxh->vx_flags); |
1200 | vni = ntohl(vxh->vx_vni); | |
1201 | ||
1202 | if (flags & VXLAN_HF_VNI) { | |
1203 | flags &= ~VXLAN_HF_VNI; | |
1204 | } else { | |
1205 | /* VNI flag always required to be set */ | |
1206 | goto bad_flags; | |
d342894c | 1207 | } |
1208 | ||
5cfccc5a PS |
1209 | if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) |
1210 | goto drop; | |
dfd8645e | 1211 | vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1); |
5cfccc5a | 1212 | |
559835ea | 1213 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1214 | if (!vs) |
d342894c | 1215 | goto drop; |
d342894c | 1216 | |
dfd8645e | 1217 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { |
0ace2ca8 TH |
1218 | vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni, |
1219 | !!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
1220 | if (!vxh) |
1221 | goto drop; | |
1222 | ||
1223 | flags &= ~VXLAN_HF_RCO; | |
1224 | vni &= VXLAN_VID_MASK; | |
1225 | } | |
1226 | ||
3511494c TG |
1227 | /* For backwards compatibility, only allow reserved fields to be |
1228 | * used by VXLAN extensions if explicitly requested. | |
1229 | */ | |
1230 | if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) { | |
1231 | struct vxlanhdr_gbp *gbp; | |
1232 | ||
1233 | gbp = (struct vxlanhdr_gbp *)vxh; | |
1234 | md.gbp = ntohs(gbp->policy_id); | |
1235 | ||
1236 | if (gbp->dont_learn) | |
1237 | md.gbp |= VXLAN_GBP_DONT_LEARN; | |
1238 | ||
1239 | if (gbp->policy_applied) | |
1240 | md.gbp |= VXLAN_GBP_POLICY_APPLIED; | |
1241 | ||
1242 | flags &= ~VXLAN_GBP_USED_BITS; | |
1243 | } | |
1244 | ||
dfd8645e | 1245 | if (flags || (vni & ~VXLAN_VID_MASK)) { |
3bf39475 TH |
1246 | /* If there are any unprocessed flags remaining treat |
1247 | * this as a malformed packet. This behavior diverges from | |
1248 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1249 | * in reserved fields are to be ignored. The approach here | |
1250 | * maintains compatbility with previous stack code, and also | |
1251 | * is more robust and provides a little more security in | |
1252 | * adding extensions to VXLAN. | |
1253 | */ | |
1254 | ||
1255 | goto bad_flags; | |
1256 | } | |
1257 | ||
3511494c TG |
1258 | md.vni = vxh->vx_vni; |
1259 | vs->rcv(vs, skb, &md); | |
5cfccc5a PS |
1260 | return 0; |
1261 | ||
1262 | drop: | |
1263 | /* Consume bad packet */ | |
1264 | kfree_skb(skb); | |
1265 | return 0; | |
1266 | ||
3bf39475 TH |
1267 | bad_flags: |
1268 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1269 | ntohl(vxh->vx_flags), ntohl(vxh->vx_vni)); | |
1270 | ||
5cfccc5a PS |
1271 | error: |
1272 | /* Return non vxlan pkt */ | |
1273 | return 1; | |
1274 | } | |
1275 | ||
3511494c TG |
1276 | static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb, |
1277 | struct vxlan_metadata *md) | |
5cfccc5a | 1278 | { |
e4c7ed41 CW |
1279 | struct iphdr *oip = NULL; |
1280 | struct ipv6hdr *oip6 = NULL; | |
5cfccc5a | 1281 | struct vxlan_dev *vxlan; |
8f84985f | 1282 | struct pcpu_sw_netstats *stats; |
e4c7ed41 | 1283 | union vxlan_addr saddr; |
5cfccc5a | 1284 | __u32 vni; |
e4c7ed41 CW |
1285 | int err = 0; |
1286 | union vxlan_addr *remote_ip; | |
5cfccc5a | 1287 | |
3511494c | 1288 | vni = ntohl(md->vni) >> 8; |
5cfccc5a PS |
1289 | /* Is this VNI defined? */ |
1290 | vxlan = vxlan_vs_find_vni(vs, vni); | |
1291 | if (!vxlan) | |
d342894c | 1292 | goto drop; |
d342894c | 1293 | |
e4c7ed41 | 1294 | remote_ip = &vxlan->default_dst.remote_ip; |
e4f67add | 1295 | skb_reset_mac_header(skb); |
f01ec1c0 | 1296 | skb_scrub_packet(skb, !net_eq(vxlan->net, dev_net(vxlan->dev))); |
d342894c | 1297 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
f79b064c | 1298 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); |
d342894c | 1299 | |
1300 | /* Ignore packet loops (and multicast echo) */ | |
7367d0b5 | 1301 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) |
d342894c | 1302 | goto drop; |
1303 | ||
7ce04758 | 1304 | /* Re-examine inner Ethernet packet */ |
e4c7ed41 CW |
1305 | if (remote_ip->sa.sa_family == AF_INET) { |
1306 | oip = ip_hdr(skb); | |
1307 | saddr.sin.sin_addr.s_addr = oip->saddr; | |
1308 | saddr.sa.sa_family = AF_INET; | |
1309 | #if IS_ENABLED(CONFIG_IPV6) | |
1310 | } else { | |
1311 | oip6 = ipv6_hdr(skb); | |
1312 | saddr.sin6.sin6_addr = oip6->saddr; | |
1313 | saddr.sa.sa_family = AF_INET6; | |
1314 | #endif | |
1315 | } | |
1316 | ||
26a41ae6 | 1317 | if ((vxlan->flags & VXLAN_F_LEARN) && |
e4c7ed41 | 1318 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source)) |
26a41ae6 | 1319 | goto drop; |
d342894c | 1320 | |
d342894c | 1321 | skb_reset_network_header(skb); |
3511494c | 1322 | skb->mark = md->gbp; |
0afb1666 | 1323 | |
e4c7ed41 CW |
1324 | if (oip6) |
1325 | err = IP6_ECN_decapsulate(oip6, skb); | |
1326 | if (oip) | |
1327 | err = IP_ECN_decapsulate(oip, skb); | |
1328 | ||
d342894c | 1329 | if (unlikely(err)) { |
e4c7ed41 CW |
1330 | if (log_ecn_error) { |
1331 | if (oip6) | |
1332 | net_info_ratelimited("non-ECT from %pI6\n", | |
1333 | &oip6->saddr); | |
1334 | if (oip) | |
1335 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1336 | &oip->saddr, oip->tos); | |
1337 | } | |
d342894c | 1338 | if (err > 1) { |
1339 | ++vxlan->dev->stats.rx_frame_errors; | |
1340 | ++vxlan->dev->stats.rx_errors; | |
1341 | goto drop; | |
1342 | } | |
1343 | } | |
1344 | ||
e8171045 | 1345 | stats = this_cpu_ptr(vxlan->dev->tstats); |
d342894c | 1346 | u64_stats_update_begin(&stats->syncp); |
1347 | stats->rx_packets++; | |
1348 | stats->rx_bytes += skb->len; | |
1349 | u64_stats_update_end(&stats->syncp); | |
1350 | ||
1351 | netif_rx(skb); | |
1352 | ||
5cfccc5a | 1353 | return; |
d342894c | 1354 | drop: |
1355 | /* Consume bad packet */ | |
1356 | kfree_skb(skb); | |
d342894c | 1357 | } |
1358 | ||
e4f67add DS |
1359 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb) |
1360 | { | |
1361 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1362 | struct arphdr *parp; | |
1363 | u8 *arpptr, *sha; | |
1364 | __be32 sip, tip; | |
1365 | struct neighbour *n; | |
1366 | ||
1367 | if (dev->flags & IFF_NOARP) | |
1368 | goto out; | |
1369 | ||
1370 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1371 | dev->stats.tx_dropped++; | |
1372 | goto out; | |
1373 | } | |
1374 | parp = arp_hdr(skb); | |
1375 | ||
1376 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1377 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1378 | parp->ar_pro != htons(ETH_P_IP) || | |
1379 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1380 | parp->ar_hln != dev->addr_len || | |
1381 | parp->ar_pln != 4) | |
1382 | goto out; | |
1383 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1384 | sha = arpptr; | |
1385 | arpptr += dev->addr_len; /* sha */ | |
1386 | memcpy(&sip, arpptr, sizeof(sip)); | |
1387 | arpptr += sizeof(sip); | |
1388 | arpptr += dev->addr_len; /* tha */ | |
1389 | memcpy(&tip, arpptr, sizeof(tip)); | |
1390 | ||
1391 | if (ipv4_is_loopback(tip) || | |
1392 | ipv4_is_multicast(tip)) | |
1393 | goto out; | |
1394 | ||
1395 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1396 | ||
1397 | if (n) { | |
e4f67add DS |
1398 | struct vxlan_fdb *f; |
1399 | struct sk_buff *reply; | |
1400 | ||
1401 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1402 | neigh_release(n); | |
1403 | goto out; | |
1404 | } | |
1405 | ||
1406 | f = vxlan_find_mac(vxlan, n->ha); | |
e4c7ed41 | 1407 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1408 | /* bridge-local neighbor */ |
1409 | neigh_release(n); | |
1410 | goto out; | |
1411 | } | |
1412 | ||
1413 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1414 | n->ha, sha); | |
1415 | ||
1416 | neigh_release(n); | |
1417 | ||
7346135d DS |
1418 | if (reply == NULL) |
1419 | goto out; | |
1420 | ||
e4f67add DS |
1421 | skb_reset_mac_header(reply); |
1422 | __skb_pull(reply, skb_network_offset(reply)); | |
1423 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1424 | reply->pkt_type = PACKET_HOST; | |
1425 | ||
1426 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1427 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1428 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1429 | union vxlan_addr ipa = { | |
1430 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1431 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1432 | }; |
1433 | ||
1434 | vxlan_ip_miss(dev, &ipa); | |
1435 | } | |
e4f67add DS |
1436 | out: |
1437 | consume_skb(skb); | |
1438 | return NETDEV_TX_OK; | |
1439 | } | |
1440 | ||
f564f45c | 1441 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1442 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1443 | struct neighbour *n, bool isrouter) | |
1444 | { | |
1445 | struct net_device *dev = request->dev; | |
1446 | struct sk_buff *reply; | |
1447 | struct nd_msg *ns, *na; | |
1448 | struct ipv6hdr *pip6; | |
1449 | u8 *daddr; | |
1450 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1451 | int ns_olen; | |
1452 | int i, len; | |
1453 | ||
1454 | if (dev == NULL) | |
1455 | return NULL; | |
1456 | ||
1457 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1458 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1459 | reply = alloc_skb(len, GFP_ATOMIC); | |
1460 | if (reply == NULL) | |
1461 | return NULL; | |
1462 | ||
1463 | reply->protocol = htons(ETH_P_IPV6); | |
1464 | reply->dev = dev; | |
1465 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1466 | skb_push(reply, sizeof(struct ethhdr)); | |
1467 | skb_set_mac_header(reply, 0); | |
1468 | ||
1469 | ns = (struct nd_msg *)skb_transport_header(request); | |
1470 | ||
1471 | daddr = eth_hdr(request)->h_source; | |
1472 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1473 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1474 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1475 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1476 | break; | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | /* Ethernet header */ | |
1481 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1482 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1483 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1484 | reply->protocol = htons(ETH_P_IPV6); | |
1485 | ||
1486 | skb_pull(reply, sizeof(struct ethhdr)); | |
1487 | skb_set_network_header(reply, 0); | |
1488 | skb_put(reply, sizeof(struct ipv6hdr)); | |
1489 | ||
1490 | /* IPv6 header */ | |
1491 | ||
1492 | pip6 = ipv6_hdr(reply); | |
1493 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1494 | pip6->version = 6; | |
1495 | pip6->priority = ipv6_hdr(request)->priority; | |
1496 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1497 | pip6->hop_limit = 255; | |
1498 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1499 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1500 | ||
1501 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
1502 | skb_set_transport_header(reply, 0); | |
1503 | ||
1504 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1505 | ||
1506 | /* Neighbor Advertisement */ | |
1507 | memset(na, 0, sizeof(*na)+na_olen); | |
1508 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1509 | na->icmph.icmp6_router = isrouter; | |
1510 | na->icmph.icmp6_override = 1; | |
1511 | na->icmph.icmp6_solicited = 1; | |
1512 | na->target = ns->target; | |
1513 | ether_addr_copy(&na->opt[2], n->ha); | |
1514 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1515 | na->opt[1] = na_olen >> 3; | |
1516 | ||
1517 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1518 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1519 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1520 | ||
1521 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1522 | ||
1523 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1524 | ||
1525 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1526 | ||
1527 | return reply; | |
1528 | } | |
1529 | ||
f564f45c CW |
1530 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) |
1531 | { | |
1532 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1533 | struct nd_msg *msg; |
f564f45c CW |
1534 | const struct ipv6hdr *iphdr; |
1535 | const struct in6_addr *saddr, *daddr; | |
4b29dba9 DS |
1536 | struct neighbour *n; |
1537 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1538 | |
1539 | in6_dev = __in6_dev_get(dev); | |
1540 | if (!in6_dev) | |
1541 | goto out; | |
1542 | ||
f564f45c CW |
1543 | iphdr = ipv6_hdr(skb); |
1544 | saddr = &iphdr->saddr; | |
1545 | daddr = &iphdr->daddr; | |
1546 | ||
f564f45c CW |
1547 | msg = (struct nd_msg *)skb_transport_header(skb); |
1548 | if (msg->icmph.icmp6_code != 0 || | |
1549 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1550 | goto out; | |
1551 | ||
4b29dba9 DS |
1552 | if (ipv6_addr_loopback(daddr) || |
1553 | ipv6_addr_is_multicast(&msg->target)) | |
1554 | goto out; | |
1555 | ||
1556 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1557 | |
1558 | if (n) { | |
1559 | struct vxlan_fdb *f; | |
4b29dba9 | 1560 | struct sk_buff *reply; |
f564f45c CW |
1561 | |
1562 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1563 | neigh_release(n); | |
1564 | goto out; | |
1565 | } | |
1566 | ||
1567 | f = vxlan_find_mac(vxlan, n->ha); | |
1568 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { | |
1569 | /* bridge-local neighbor */ | |
1570 | neigh_release(n); | |
1571 | goto out; | |
1572 | } | |
1573 | ||
4b29dba9 DS |
1574 | reply = vxlan_na_create(skb, n, |
1575 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1576 | ||
f564f45c | 1577 | neigh_release(n); |
4b29dba9 DS |
1578 | |
1579 | if (reply == NULL) | |
1580 | goto out; | |
1581 | ||
1582 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1583 | dev->stats.rx_dropped++; | |
1584 | ||
f564f45c | 1585 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1586 | union vxlan_addr ipa = { |
1587 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1588 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1589 | }; |
1590 | ||
f564f45c CW |
1591 | vxlan_ip_miss(dev, &ipa); |
1592 | } | |
1593 | ||
1594 | out: | |
1595 | consume_skb(skb); | |
1596 | return NETDEV_TX_OK; | |
1597 | } | |
1598 | #endif | |
1599 | ||
e4f67add DS |
1600 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1601 | { | |
1602 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1603 | struct neighbour *n; | |
e4f67add DS |
1604 | |
1605 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1606 | return false; | |
1607 | ||
1608 | n = NULL; | |
1609 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1610 | case ETH_P_IP: | |
e15a00aa CW |
1611 | { |
1612 | struct iphdr *pip; | |
1613 | ||
e4f67add DS |
1614 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1615 | return false; | |
1616 | pip = ip_hdr(skb); | |
1617 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1618 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1619 | union vxlan_addr ipa = { | |
1620 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 1621 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1622 | }; |
1623 | ||
1624 | vxlan_ip_miss(dev, &ipa); | |
1625 | return false; | |
1626 | } | |
1627 | ||
e4f67add | 1628 | break; |
e15a00aa CW |
1629 | } |
1630 | #if IS_ENABLED(CONFIG_IPV6) | |
1631 | case ETH_P_IPV6: | |
1632 | { | |
1633 | struct ipv6hdr *pip6; | |
1634 | ||
1635 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1636 | return false; | |
1637 | pip6 = ipv6_hdr(skb); | |
1638 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1639 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1640 | union vxlan_addr ipa = { | |
1641 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 1642 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
1643 | }; |
1644 | ||
1645 | vxlan_ip_miss(dev, &ipa); | |
1646 | return false; | |
1647 | } | |
1648 | ||
1649 | break; | |
1650 | } | |
1651 | #endif | |
e4f67add DS |
1652 | default: |
1653 | return false; | |
1654 | } | |
1655 | ||
1656 | if (n) { | |
1657 | bool diff; | |
1658 | ||
7367d0b5 | 1659 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1660 | if (diff) { |
1661 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1662 | dev->addr_len); | |
1663 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1664 | } | |
1665 | neigh_release(n); | |
1666 | return diff; | |
e4c7ed41 CW |
1667 | } |
1668 | ||
e4f67add DS |
1669 | return false; |
1670 | } | |
1671 | ||
af33c1ad | 1672 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
1673 | struct vxlan_metadata *md) |
1674 | { | |
1675 | struct vxlanhdr_gbp *gbp; | |
1676 | ||
db79a621 TG |
1677 | if (!md->gbp) |
1678 | return; | |
1679 | ||
3511494c TG |
1680 | gbp = (struct vxlanhdr_gbp *)vxh; |
1681 | vxh->vx_flags |= htonl(VXLAN_HF_GBP); | |
1682 | ||
1683 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
1684 | gbp->dont_learn = 1; | |
1685 | ||
1686 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
1687 | gbp->policy_applied = 1; | |
1688 | ||
1689 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
1690 | } | |
1691 | ||
e4c7ed41 | 1692 | #if IS_ENABLED(CONFIG_IPV6) |
af33c1ad | 1693 | static int vxlan6_xmit_skb(struct dst_entry *dst, struct sk_buff *skb, |
e4c7ed41 CW |
1694 | struct net_device *dev, struct in6_addr *saddr, |
1695 | struct in6_addr *daddr, __u8 prio, __u8 ttl, | |
3511494c | 1696 | __be16 src_port, __be16 dst_port, |
af33c1ad | 1697 | struct vxlan_metadata *md, bool xnet, u32 vxflags) |
e4c7ed41 | 1698 | { |
e4c7ed41 | 1699 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
1700 | int min_headroom; |
1701 | int err; | |
af33c1ad | 1702 | bool udp_sum = !(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX); |
dfd8645e TH |
1703 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1704 | u16 hdrlen = sizeof(struct vxlanhdr); | |
1705 | ||
af33c1ad | 1706 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1707 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1708 | int csum_start = skb_checksum_start_offset(skb); | |
1709 | ||
1710 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1711 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1712 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
1713 | skb->csum_offset == offsetof(struct tcphdr, check))) { | |
1714 | udp_sum = false; | |
1715 | type |= SKB_GSO_TUNNEL_REMCSUM; | |
1716 | } | |
1717 | } | |
e4c7ed41 | 1718 | |
dfd8645e | 1719 | skb = iptunnel_handle_offloads(skb, udp_sum, type); |
74f47278 PS |
1720 | if (IS_ERR(skb)) { |
1721 | err = -EINVAL; | |
1722 | goto err; | |
1723 | } | |
e4c7ed41 | 1724 | |
f01ec1c0 | 1725 | skb_scrub_packet(skb, xnet); |
963a88b3 | 1726 | |
e4c7ed41 CW |
1727 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
1728 | + VXLAN_HLEN + sizeof(struct ipv6hdr) | |
df8a39de | 1729 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
e4c7ed41 CW |
1730 | |
1731 | /* Need space for new headers (invalidates iph ptr) */ | |
1732 | err = skb_cow_head(skb, min_headroom); | |
74f47278 PS |
1733 | if (unlikely(err)) { |
1734 | kfree_skb(skb); | |
1735 | goto err; | |
1736 | } | |
e4c7ed41 | 1737 | |
5968250c | 1738 | skb = vlan_hwaccel_push_inside(skb); |
74f47278 PS |
1739 | if (WARN_ON(!skb)) { |
1740 | err = -ENOMEM; | |
1741 | goto err; | |
1742 | } | |
e4c7ed41 CW |
1743 | |
1744 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); | |
3bf39475 | 1745 | vxh->vx_flags = htonl(VXLAN_HF_VNI); |
3511494c | 1746 | vxh->vx_vni = md->vni; |
e4c7ed41 | 1747 | |
dfd8645e TH |
1748 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
1749 | u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> | |
1750 | VXLAN_RCO_SHIFT; | |
1751 | ||
1752 | if (skb->csum_offset == offsetof(struct udphdr, check)) | |
1753 | data |= VXLAN_RCO_UDP; | |
1754 | ||
1755 | vxh->vx_vni |= htonl(data); | |
1756 | vxh->vx_flags |= htonl(VXLAN_HF_RCO); | |
1757 | ||
1758 | if (!skb_is_gso(skb)) { | |
1759 | skb->ip_summed = CHECKSUM_NONE; | |
1760 | skb->encapsulation = 0; | |
1761 | } | |
1762 | } | |
1763 | ||
af33c1ad TH |
1764 | if (vxflags & VXLAN_F_GBP) |
1765 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
3511494c | 1766 | |
996c9fd1 TH |
1767 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
1768 | ||
d998f8ef TH |
1769 | udp_tunnel6_xmit_skb(dst, skb, dev, saddr, daddr, prio, |
1770 | ttl, src_port, dst_port, | |
af33c1ad | 1771 | !!(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX)); |
e4c7ed41 | 1772 | return 0; |
74f47278 PS |
1773 | err: |
1774 | dst_release(dst); | |
1775 | return err; | |
e4c7ed41 CW |
1776 | } |
1777 | #endif | |
1778 | ||
af33c1ad | 1779 | int vxlan_xmit_skb(struct rtable *rt, struct sk_buff *skb, |
49560532 | 1780 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, |
3511494c | 1781 | __be16 src_port, __be16 dst_port, |
af33c1ad | 1782 | struct vxlan_metadata *md, bool xnet, u32 vxflags) |
49560532 PS |
1783 | { |
1784 | struct vxlanhdr *vxh; | |
649c5b8b | 1785 | int min_headroom; |
49560532 | 1786 | int err; |
af33c1ad | 1787 | bool udp_sum = !!(vxflags & VXLAN_F_UDP_CSUM); |
dfd8645e TH |
1788 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
1789 | u16 hdrlen = sizeof(struct vxlanhdr); | |
1790 | ||
af33c1ad | 1791 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1792 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1793 | int csum_start = skb_checksum_start_offset(skb); | |
1794 | ||
1795 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1796 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1797 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
1798 | skb->csum_offset == offsetof(struct tcphdr, check))) { | |
1799 | udp_sum = false; | |
1800 | type |= SKB_GSO_TUNNEL_REMCSUM; | |
1801 | } | |
1802 | } | |
49560532 | 1803 | |
dfd8645e | 1804 | skb = iptunnel_handle_offloads(skb, udp_sum, type); |
359a0ea9 | 1805 | if (IS_ERR(skb)) |
74f47278 | 1806 | return PTR_ERR(skb); |
49560532 | 1807 | |
649c5b8b | 1808 | min_headroom = LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len |
1eaa8178 | 1809 | + VXLAN_HLEN + sizeof(struct iphdr) |
df8a39de | 1810 | + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0); |
649c5b8b PS |
1811 | |
1812 | /* Need space for new headers (invalidates iph ptr) */ | |
1813 | err = skb_cow_head(skb, min_headroom); | |
74f47278 PS |
1814 | if (unlikely(err)) { |
1815 | kfree_skb(skb); | |
649c5b8b | 1816 | return err; |
74f47278 | 1817 | } |
649c5b8b | 1818 | |
5968250c JP |
1819 | skb = vlan_hwaccel_push_inside(skb); |
1820 | if (WARN_ON(!skb)) | |
1821 | return -ENOMEM; | |
1eaa8178 | 1822 | |
49560532 | 1823 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
3bf39475 | 1824 | vxh->vx_flags = htonl(VXLAN_HF_VNI); |
3511494c | 1825 | vxh->vx_vni = md->vni; |
49560532 | 1826 | |
dfd8645e TH |
1827 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
1828 | u32 data = (skb_checksum_start_offset(skb) - hdrlen) >> | |
1829 | VXLAN_RCO_SHIFT; | |
1830 | ||
1831 | if (skb->csum_offset == offsetof(struct udphdr, check)) | |
1832 | data |= VXLAN_RCO_UDP; | |
1833 | ||
1834 | vxh->vx_vni |= htonl(data); | |
1835 | vxh->vx_flags |= htonl(VXLAN_HF_RCO); | |
1836 | ||
1837 | if (!skb_is_gso(skb)) { | |
1838 | skb->ip_summed = CHECKSUM_NONE; | |
1839 | skb->encapsulation = 0; | |
1840 | } | |
1841 | } | |
1842 | ||
af33c1ad TH |
1843 | if (vxflags & VXLAN_F_GBP) |
1844 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
3511494c | 1845 | |
996c9fd1 TH |
1846 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
1847 | ||
d998f8ef TH |
1848 | return udp_tunnel_xmit_skb(rt, skb, src, dst, tos, |
1849 | ttl, df, src_port, dst_port, xnet, | |
af33c1ad | 1850 | !(vxflags & VXLAN_F_UDP_CSUM)); |
49560532 PS |
1851 | } |
1852 | EXPORT_SYMBOL_GPL(vxlan_xmit_skb); | |
1853 | ||
9dcc71e1 SS |
1854 | /* Bypass encapsulation if the destination is local */ |
1855 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
1856 | struct vxlan_dev *dst_vxlan) | |
1857 | { | |
8f84985f | 1858 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1859 | union vxlan_addr loopback; |
1860 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
1861 | struct net_device *dev = skb->dev; |
1862 | int len = skb->len; | |
9dcc71e1 | 1863 | |
8f84985f LR |
1864 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1865 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1866 | skb->pkt_type = PACKET_HOST; |
1867 | skb->encapsulation = 0; | |
1868 | skb->dev = dst_vxlan->dev; | |
1869 | __skb_pull(skb, skb_network_offset(skb)); | |
1870 | ||
e4c7ed41 CW |
1871 | if (remote_ip->sa.sa_family == AF_INET) { |
1872 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1873 | loopback.sa.sa_family = AF_INET; | |
1874 | #if IS_ENABLED(CONFIG_IPV6) | |
1875 | } else { | |
1876 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1877 | loopback.sa.sa_family = AF_INET6; | |
1878 | #endif | |
1879 | } | |
1880 | ||
9dcc71e1 | 1881 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
e4c7ed41 | 1882 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source); |
9dcc71e1 SS |
1883 | |
1884 | u64_stats_update_begin(&tx_stats->syncp); | |
1885 | tx_stats->tx_packets++; | |
ce6502a8 | 1886 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
1887 | u64_stats_update_end(&tx_stats->syncp); |
1888 | ||
1889 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1890 | u64_stats_update_begin(&rx_stats->syncp); | |
1891 | rx_stats->rx_packets++; | |
ce6502a8 | 1892 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
1893 | u64_stats_update_end(&rx_stats->syncp); |
1894 | } else { | |
ce6502a8 | 1895 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
1896 | } |
1897 | } | |
1898 | ||
4ad16930 SH |
1899 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
1900 | struct vxlan_rdst *rdst, bool did_rsc) | |
d342894c | 1901 | { |
1902 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
e4c7ed41 | 1903 | struct rtable *rt = NULL; |
d342894c | 1904 | const struct iphdr *old_iph; |
d342894c | 1905 | struct flowi4 fl4; |
e4c7ed41 | 1906 | union vxlan_addr *dst; |
3511494c | 1907 | struct vxlan_metadata md; |
e4c7ed41 | 1908 | __be16 src_port = 0, dst_port; |
234f5b73 | 1909 | u32 vni; |
d342894c | 1910 | __be16 df = 0; |
1911 | __u8 tos, ttl; | |
0e6fbc5b | 1912 | int err; |
d342894c | 1913 | |
823aa873 | 1914 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->dst_port; |
6681712d | 1915 | vni = rdst->remote_vni; |
e4c7ed41 | 1916 | dst = &rdst->remote_ip; |
e4f67add | 1917 | |
e4c7ed41 | 1918 | if (vxlan_addr_any(dst)) { |
e4f67add | 1919 | if (did_rsc) { |
e4f67add | 1920 | /* short-circuited back to local bridge */ |
9dcc71e1 | 1921 | vxlan_encap_bypass(skb, vxlan, vxlan); |
4ad16930 | 1922 | return; |
e4f67add | 1923 | } |
ef59febe | 1924 | goto drop; |
e4f67add | 1925 | } |
ef59febe | 1926 | |
d342894c | 1927 | old_iph = ip_hdr(skb); |
1928 | ||
d342894c | 1929 | ttl = vxlan->ttl; |
e4c7ed41 | 1930 | if (!ttl && vxlan_addr_multicast(dst)) |
d342894c | 1931 | ttl = 1; |
1932 | ||
1933 | tos = vxlan->tos; | |
1934 | if (tos == 1) | |
206aaafc | 1935 | tos = ip_tunnel_get_dsfield(old_iph, skb); |
d342894c | 1936 | |
535fb8d0 TH |
1937 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->port_min, |
1938 | vxlan->port_max, true); | |
d342894c | 1939 | |
e4c7ed41 CW |
1940 | if (dst->sa.sa_family == AF_INET) { |
1941 | memset(&fl4, 0, sizeof(fl4)); | |
1942 | fl4.flowi4_oif = rdst->remote_ifindex; | |
1943 | fl4.flowi4_tos = RT_TOS(tos); | |
1944 | fl4.daddr = dst->sin.sin_addr.s_addr; | |
1945 | fl4.saddr = vxlan->saddr.sin.sin_addr.s_addr; | |
1946 | ||
f01ec1c0 | 1947 | rt = ip_route_output_key(vxlan->net, &fl4); |
e4c7ed41 CW |
1948 | if (IS_ERR(rt)) { |
1949 | netdev_dbg(dev, "no route to %pI4\n", | |
1950 | &dst->sin.sin_addr.s_addr); | |
1951 | dev->stats.tx_carrier_errors++; | |
1952 | goto tx_error; | |
1953 | } | |
d342894c | 1954 | |
e4c7ed41 CW |
1955 | if (rt->dst.dev == dev) { |
1956 | netdev_dbg(dev, "circular route to %pI4\n", | |
1957 | &dst->sin.sin_addr.s_addr); | |
1958 | dev->stats.collisions++; | |
fffc15a5 | 1959 | goto rt_tx_error; |
e4c7ed41 CW |
1960 | } |
1961 | ||
1962 | /* Bypass encapsulation if the destination is local */ | |
1963 | if (rt->rt_flags & RTCF_LOCAL && | |
1964 | !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
1965 | struct vxlan_dev *dst_vxlan; | |
1966 | ||
1967 | ip_rt_put(rt); | |
19ca9fc1 | 1968 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
1969 | dst->sa.sa_family, dst_port, |
1970 | vxlan->flags); | |
e4c7ed41 CW |
1971 | if (!dst_vxlan) |
1972 | goto tx_error; | |
1973 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
1974 | return; | |
1975 | } | |
1976 | ||
1977 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); | |
1978 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
3511494c TG |
1979 | md.vni = htonl(vni << 8); |
1980 | md.gbp = skb->mark; | |
d342894c | 1981 | |
af33c1ad TH |
1982 | err = vxlan_xmit_skb(rt, skb, fl4.saddr, |
1983 | dst->sin.sin_addr.s_addr, tos, ttl, df, | |
1984 | src_port, dst_port, &md, | |
1985 | !net_eq(vxlan->net, dev_net(vxlan->dev)), | |
1986 | vxlan->flags); | |
74f47278 PS |
1987 | if (err < 0) { |
1988 | /* skb is already freed. */ | |
1989 | skb = NULL; | |
e4c7ed41 | 1990 | goto rt_tx_error; |
74f47278 PS |
1991 | } |
1992 | ||
e4c7ed41 CW |
1993 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); |
1994 | #if IS_ENABLED(CONFIG_IPV6) | |
1995 | } else { | |
1996 | struct sock *sk = vxlan->vn_sock->sock->sk; | |
1997 | struct dst_entry *ndst; | |
1998 | struct flowi6 fl6; | |
1999 | u32 flags; | |
2000 | ||
2001 | memset(&fl6, 0, sizeof(fl6)); | |
2002 | fl6.flowi6_oif = rdst->remote_ifindex; | |
2003 | fl6.daddr = dst->sin6.sin6_addr; | |
2004 | fl6.saddr = vxlan->saddr.sin6.sin6_addr; | |
8c1bb79f | 2005 | fl6.flowi6_proto = IPPROTO_UDP; |
e4c7ed41 CW |
2006 | |
2007 | if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) { | |
2008 | netdev_dbg(dev, "no route to %pI6\n", | |
2009 | &dst->sin6.sin6_addr); | |
2010 | dev->stats.tx_carrier_errors++; | |
9dcc71e1 | 2011 | goto tx_error; |
e4c7ed41 | 2012 | } |
d342894c | 2013 | |
e4c7ed41 CW |
2014 | if (ndst->dev == dev) { |
2015 | netdev_dbg(dev, "circular route to %pI6\n", | |
2016 | &dst->sin6.sin6_addr); | |
2017 | dst_release(ndst); | |
2018 | dev->stats.collisions++; | |
2019 | goto tx_error; | |
2020 | } | |
0e6fbc5b | 2021 | |
e4c7ed41 CW |
2022 | /* Bypass encapsulation if the destination is local */ |
2023 | flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
2024 | if (flags & RTF_LOCAL && | |
2025 | !(flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
2026 | struct vxlan_dev *dst_vxlan; | |
2027 | ||
2028 | dst_release(ndst); | |
19ca9fc1 | 2029 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, |
ac5132d1 TG |
2030 | dst->sa.sa_family, dst_port, |
2031 | vxlan->flags); | |
e4c7ed41 CW |
2032 | if (!dst_vxlan) |
2033 | goto tx_error; | |
2034 | vxlan_encap_bypass(skb, vxlan, dst_vxlan); | |
2035 | return; | |
2036 | } | |
49560532 | 2037 | |
e4c7ed41 | 2038 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
3511494c TG |
2039 | md.vni = htonl(vni << 8); |
2040 | md.gbp = skb->mark; | |
e4c7ed41 | 2041 | |
af33c1ad TH |
2042 | err = vxlan6_xmit_skb(ndst, skb, dev, &fl6.saddr, &fl6.daddr, |
2043 | 0, ttl, src_port, dst_port, &md, | |
2044 | !net_eq(vxlan->net, dev_net(vxlan->dev)), | |
2045 | vxlan->flags); | |
e4c7ed41 CW |
2046 | #endif |
2047 | } | |
0e6fbc5b | 2048 | |
4ad16930 | 2049 | return; |
d342894c | 2050 | |
2051 | drop: | |
2052 | dev->stats.tx_dropped++; | |
2053 | goto tx_free; | |
2054 | ||
49560532 PS |
2055 | rt_tx_error: |
2056 | ip_rt_put(rt); | |
d342894c | 2057 | tx_error: |
2058 | dev->stats.tx_errors++; | |
2059 | tx_free: | |
2060 | dev_kfree_skb(skb); | |
d342894c | 2061 | } |
2062 | ||
6681712d DS |
2063 | /* Transmit local packets over Vxlan |
2064 | * | |
2065 | * Outer IP header inherits ECN and DF from inner header. | |
2066 | * Outer UDP destination is the VXLAN assigned port. | |
2067 | * source port is based on hash of flow | |
2068 | */ | |
2069 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2070 | { | |
2071 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2072 | struct ethhdr *eth; | |
2073 | bool did_rsc = false; | |
8f646c92 | 2074 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 2075 | struct vxlan_fdb *f; |
6681712d DS |
2076 | |
2077 | skb_reset_mac_header(skb); | |
2078 | eth = eth_hdr(skb); | |
2079 | ||
f564f45c CW |
2080 | if ((vxlan->flags & VXLAN_F_PROXY)) { |
2081 | if (ntohs(eth->h_proto) == ETH_P_ARP) | |
2082 | return arp_reduce(dev, skb); | |
2083 | #if IS_ENABLED(CONFIG_IPV6) | |
2084 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
91269e39 LR |
2085 | pskb_may_pull(skb, sizeof(struct ipv6hdr) |
2086 | + sizeof(struct nd_msg)) && | |
f564f45c CW |
2087 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { |
2088 | struct nd_msg *msg; | |
2089 | ||
2090 | msg = (struct nd_msg *)skb_transport_header(skb); | |
2091 | if (msg->icmph.icmp6_code == 0 && | |
2092 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
2093 | return neigh_reduce(dev, skb); | |
2094 | } | |
7a9f526f | 2095 | eth = eth_hdr(skb); |
f564f45c CW |
2096 | #endif |
2097 | } | |
6681712d DS |
2098 | |
2099 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
ae884082 DS |
2100 | did_rsc = false; |
2101 | ||
2102 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
2103 | (ntohs(eth->h_proto) == ETH_P_IP || |
2104 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2105 | did_rsc = route_shortcircuit(dev, skb); |
2106 | if (did_rsc) | |
2107 | f = vxlan_find_mac(vxlan, eth->h_dest); | |
2108 | } | |
2109 | ||
6681712d | 2110 | if (f == NULL) { |
afbd8bae MR |
2111 | f = vxlan_find_mac(vxlan, all_zeros_mac); |
2112 | if (f == NULL) { | |
2113 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
2114 | !is_multicast_ether_addr(eth->h_dest)) | |
2115 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2116 | ||
2117 | dev->stats.tx_dropped++; | |
8f646c92 | 2118 | kfree_skb(skb); |
afbd8bae MR |
2119 | return NETDEV_TX_OK; |
2120 | } | |
2121 | } | |
6681712d | 2122 | |
afbd8bae MR |
2123 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2124 | struct sk_buff *skb1; | |
6681712d | 2125 | |
8f646c92 ED |
2126 | if (!fdst) { |
2127 | fdst = rdst; | |
2128 | continue; | |
2129 | } | |
afbd8bae MR |
2130 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2131 | if (skb1) | |
2132 | vxlan_xmit_one(skb1, dev, rdst, did_rsc); | |
6681712d DS |
2133 | } |
2134 | ||
8f646c92 ED |
2135 | if (fdst) |
2136 | vxlan_xmit_one(skb, dev, fdst, did_rsc); | |
2137 | else | |
2138 | kfree_skb(skb); | |
4ad16930 | 2139 | return NETDEV_TX_OK; |
6681712d DS |
2140 | } |
2141 | ||
d342894c | 2142 | /* Walk the forwarding table and purge stale entries */ |
2143 | static void vxlan_cleanup(unsigned long arg) | |
2144 | { | |
2145 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2146 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2147 | unsigned int h; | |
2148 | ||
2149 | if (!netif_running(vxlan->dev)) | |
2150 | return; | |
2151 | ||
2152 | spin_lock_bh(&vxlan->hash_lock); | |
2153 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2154 | struct hlist_node *p, *n; | |
2155 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2156 | struct vxlan_fdb *f | |
2157 | = container_of(p, struct vxlan_fdb, hlist); | |
2158 | unsigned long timeout; | |
2159 | ||
3c172868 | 2160 | if (f->state & NUD_PERMANENT) |
d342894c | 2161 | continue; |
2162 | ||
2163 | timeout = f->used + vxlan->age_interval * HZ; | |
2164 | if (time_before_eq(timeout, jiffies)) { | |
2165 | netdev_dbg(vxlan->dev, | |
2166 | "garbage collect %pM\n", | |
2167 | f->eth_addr); | |
2168 | f->state = NUD_STALE; | |
2169 | vxlan_fdb_destroy(vxlan, f); | |
2170 | } else if (time_before(timeout, next_timer)) | |
2171 | next_timer = timeout; | |
2172 | } | |
2173 | } | |
2174 | spin_unlock_bh(&vxlan->hash_lock); | |
2175 | ||
2176 | mod_timer(&vxlan->age_timer, next_timer); | |
2177 | } | |
2178 | ||
9c2e24e1 PS |
2179 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2180 | { | |
2181 | __u32 vni = vxlan->default_dst.remote_vni; | |
2182 | ||
2183 | vxlan->vn_sock = vs; | |
2184 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); | |
2185 | } | |
2186 | ||
d342894c | 2187 | /* Setup stats when device is created */ |
2188 | static int vxlan_init(struct net_device *dev) | |
2189 | { | |
1c51a915 | 2190 | struct vxlan_dev *vxlan = netdev_priv(dev); |
f01ec1c0 | 2191 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2192 | struct vxlan_sock *vs; |
19ca9fc1 | 2193 | bool ipv6 = vxlan->flags & VXLAN_F_IPV6; |
1c51a915 | 2194 | |
1c213bd2 | 2195 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2196 | if (!dev->tstats) |
d342894c | 2197 | return -ENOMEM; |
2198 | ||
1c51a915 | 2199 | spin_lock(&vn->sock_lock); |
19ca9fc1 | 2200 | vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
ac5132d1 | 2201 | vxlan->dst_port, vxlan->flags); |
00c83b01 | 2202 | if (vs && atomic_add_unless(&vs->refcnt, 1, 0)) { |
1c51a915 | 2203 | /* If we have a socket with same port already, reuse it */ |
9c2e24e1 | 2204 | vxlan_vs_add_dev(vs, vxlan); |
1c51a915 SH |
2205 | } else { |
2206 | /* otherwise make new socket outside of RTNL */ | |
2207 | dev_hold(dev); | |
2208 | queue_work(vxlan_wq, &vxlan->sock_work); | |
2209 | } | |
2210 | spin_unlock(&vn->sock_lock); | |
2211 | ||
d342894c | 2212 | return 0; |
2213 | } | |
2214 | ||
ba609e9b | 2215 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan) |
afbd8bae MR |
2216 | { |
2217 | struct vxlan_fdb *f; | |
2218 | ||
2219 | spin_lock_bh(&vxlan->hash_lock); | |
2220 | f = __vxlan_find_mac(vxlan, all_zeros_mac); | |
2221 | if (f) | |
2222 | vxlan_fdb_destroy(vxlan, f); | |
2223 | spin_unlock_bh(&vxlan->hash_lock); | |
2224 | } | |
2225 | ||
ebf4063e SH |
2226 | static void vxlan_uninit(struct net_device *dev) |
2227 | { | |
2228 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e SH |
2229 | struct vxlan_sock *vs = vxlan->vn_sock; |
2230 | ||
ba609e9b | 2231 | vxlan_fdb_delete_default(vxlan); |
afbd8bae | 2232 | |
ebf4063e | 2233 | if (vs) |
012a5729 | 2234 | vxlan_sock_release(vs); |
ebf4063e SH |
2235 | free_percpu(dev->tstats); |
2236 | } | |
2237 | ||
d342894c | 2238 | /* Start ageing timer and join group when device is brought up */ |
2239 | static int vxlan_open(struct net_device *dev) | |
2240 | { | |
2241 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1c51a915 SH |
2242 | struct vxlan_sock *vs = vxlan->vn_sock; |
2243 | ||
2244 | /* socket hasn't been created */ | |
2245 | if (!vs) | |
2246 | return -ENOTCONN; | |
d342894c | 2247 | |
79d4a94f | 2248 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
1c51a915 | 2249 | vxlan_sock_hold(vs); |
7c47cedf | 2250 | dev_hold(dev); |
3fc2de2f | 2251 | queue_work(vxlan_wq, &vxlan->igmp_join); |
d342894c | 2252 | } |
2253 | ||
2254 | if (vxlan->age_interval) | |
2255 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); | |
2256 | ||
2257 | return 0; | |
2258 | } | |
2259 | ||
2260 | /* Purge the forwarding table */ | |
2261 | static void vxlan_flush(struct vxlan_dev *vxlan) | |
2262 | { | |
31fec5aa | 2263 | unsigned int h; |
d342894c | 2264 | |
2265 | spin_lock_bh(&vxlan->hash_lock); | |
2266 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2267 | struct hlist_node *p, *n; | |
2268 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2269 | struct vxlan_fdb *f | |
2270 | = container_of(p, struct vxlan_fdb, hlist); | |
afbd8bae MR |
2271 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2272 | if (!is_zero_ether_addr(f->eth_addr)) | |
2273 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2274 | } |
2275 | } | |
2276 | spin_unlock_bh(&vxlan->hash_lock); | |
2277 | } | |
2278 | ||
2279 | /* Cleanup timer and forwarding table on shutdown */ | |
2280 | static int vxlan_stop(struct net_device *dev) | |
2281 | { | |
2282 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2283 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
1c51a915 | 2284 | struct vxlan_sock *vs = vxlan->vn_sock; |
d342894c | 2285 | |
e4c7ed41 | 2286 | if (vs && vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
95ab0991 | 2287 | !vxlan_group_used(vn, vxlan)) { |
1c51a915 | 2288 | vxlan_sock_hold(vs); |
7c47cedf | 2289 | dev_hold(dev); |
3fc2de2f | 2290 | queue_work(vxlan_wq, &vxlan->igmp_leave); |
7c47cedf | 2291 | } |
d342894c | 2292 | |
2293 | del_timer_sync(&vxlan->age_timer); | |
2294 | ||
2295 | vxlan_flush(vxlan); | |
2296 | ||
2297 | return 0; | |
2298 | } | |
2299 | ||
d342894c | 2300 | /* Stub, nothing needs to be done. */ |
2301 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2302 | { | |
2303 | } | |
2304 | ||
345010b5 DB |
2305 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
2306 | { | |
2307 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2308 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2309 | struct net_device *lowerdev; | |
2310 | int max_mtu; | |
2311 | ||
f01ec1c0 | 2312 | lowerdev = __dev_get_by_index(vxlan->net, dst->remote_ifindex); |
345010b5 DB |
2313 | if (lowerdev == NULL) |
2314 | return eth_change_mtu(dev, new_mtu); | |
2315 | ||
2316 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
2317 | max_mtu = lowerdev->mtu - VXLAN6_HEADROOM; | |
2318 | else | |
2319 | max_mtu = lowerdev->mtu - VXLAN_HEADROOM; | |
2320 | ||
2321 | if (new_mtu < 68 || new_mtu > max_mtu) | |
2322 | return -EINVAL; | |
2323 | ||
2324 | dev->mtu = new_mtu; | |
2325 | return 0; | |
2326 | } | |
2327 | ||
d342894c | 2328 | static const struct net_device_ops vxlan_netdev_ops = { |
2329 | .ndo_init = vxlan_init, | |
ebf4063e | 2330 | .ndo_uninit = vxlan_uninit, |
d342894c | 2331 | .ndo_open = vxlan_open, |
2332 | .ndo_stop = vxlan_stop, | |
2333 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2334 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2335 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2336 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2337 | .ndo_validate_addr = eth_validate_addr, |
2338 | .ndo_set_mac_address = eth_mac_addr, | |
2339 | .ndo_fdb_add = vxlan_fdb_add, | |
2340 | .ndo_fdb_del = vxlan_fdb_delete, | |
2341 | .ndo_fdb_dump = vxlan_fdb_dump, | |
2342 | }; | |
2343 | ||
2344 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
2345 | static struct device_type vxlan_type = { | |
2346 | .name = "vxlan", | |
2347 | }; | |
2348 | ||
53cf5275 | 2349 | /* Calls the ndo_add_vxlan_port of the caller in order to |
35e42379 JG |
2350 | * supply the listening VXLAN udp ports. Callers are expected |
2351 | * to implement the ndo_add_vxlan_port. | |
53cf5275 JG |
2352 | */ |
2353 | void vxlan_get_rx_port(struct net_device *dev) | |
2354 | { | |
2355 | struct vxlan_sock *vs; | |
2356 | struct net *net = dev_net(dev); | |
2357 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2358 | sa_family_t sa_family; | |
35e42379 JG |
2359 | __be16 port; |
2360 | unsigned int i; | |
53cf5275 JG |
2361 | |
2362 | spin_lock(&vn->sock_lock); | |
2363 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
35e42379 JG |
2364 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2365 | port = inet_sk(vs->sock->sk)->inet_sport; | |
53cf5275 JG |
2366 | sa_family = vs->sock->sk->sk_family; |
2367 | dev->netdev_ops->ndo_add_vxlan_port(dev, sa_family, | |
2368 | port); | |
2369 | } | |
2370 | } | |
2371 | spin_unlock(&vn->sock_lock); | |
2372 | } | |
2373 | EXPORT_SYMBOL_GPL(vxlan_get_rx_port); | |
2374 | ||
d342894c | 2375 | /* Initialize the device structure. */ |
2376 | static void vxlan_setup(struct net_device *dev) | |
2377 | { | |
2378 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2379 | unsigned int h; |
d342894c | 2380 | |
2381 | eth_hw_addr_random(dev); | |
2382 | ether_setup(dev); | |
e4c7ed41 | 2383 | if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6) |
2853af6a | 2384 | dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM; |
e4c7ed41 | 2385 | else |
2853af6a | 2386 | dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM; |
d342894c | 2387 | |
2388 | dev->netdev_ops = &vxlan_netdev_ops; | |
ebf4063e | 2389 | dev->destructor = free_netdev; |
d342894c | 2390 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2391 | ||
2392 | dev->tx_queue_len = 0; | |
2393 | dev->features |= NETIF_F_LLTX; | |
d6727fe3 | 2394 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2395 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2396 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2397 | |
1eaa8178 PS |
2398 | dev->vlan_features = dev->features; |
2399 | dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; | |
0afb1666 | 2400 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2401 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
1eaa8178 | 2402 | dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX; |
02875878 | 2403 | netif_keep_dst(dev); |
6602d007 | 2404 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
d342894c | 2405 | |
553675fb | 2406 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2407 | spin_lock_init(&vxlan->hash_lock); |
3fc2de2f | 2408 | INIT_WORK(&vxlan->igmp_join, vxlan_igmp_join); |
2409 | INIT_WORK(&vxlan->igmp_leave, vxlan_igmp_leave); | |
1c51a915 | 2410 | INIT_WORK(&vxlan->sock_work, vxlan_sock_work); |
d342894c | 2411 | |
2412 | init_timer_deferrable(&vxlan->age_timer); | |
2413 | vxlan->age_timer.function = vxlan_cleanup; | |
2414 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2415 | ||
823aa873 | 2416 | vxlan->dst_port = htons(vxlan_port); |
05f47d69 | 2417 | |
d342894c | 2418 | vxlan->dev = dev; |
2419 | ||
2420 | for (h = 0; h < FDB_HASH_SIZE; ++h) | |
2421 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2422 | } | |
2423 | ||
2424 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { | |
2425 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2426 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2427 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2428 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2429 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2430 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2431 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2432 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
2433 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, | |
2434 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2435 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2436 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2437 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2438 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2439 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2440 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
823aa873 | 2441 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
2442 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
2443 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
2444 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
2445 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
2446 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 2447 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
0ace2ca8 | 2448 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
d342894c | 2449 | }; |
2450 | ||
2451 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2452 | { | |
2453 | if (tb[IFLA_ADDRESS]) { | |
2454 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2455 | pr_debug("invalid link address (not ethernet)\n"); | |
2456 | return -EINVAL; | |
2457 | } | |
2458 | ||
2459 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2460 | pr_debug("invalid all zero ethernet address\n"); | |
2461 | return -EADDRNOTAVAIL; | |
2462 | } | |
2463 | } | |
2464 | ||
2465 | if (!data) | |
2466 | return -EINVAL; | |
2467 | ||
2468 | if (data[IFLA_VXLAN_ID]) { | |
2469 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
2470 | if (id >= VXLAN_VID_MASK) | |
2471 | return -ERANGE; | |
2472 | } | |
2473 | ||
05f47d69 | 2474 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2475 | const struct ifla_vxlan_port_range *p | |
2476 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2477 | ||
2478 | if (ntohs(p->high) < ntohs(p->low)) { | |
2479 | pr_debug("port range %u .. %u not valid\n", | |
2480 | ntohs(p->low), ntohs(p->high)); | |
2481 | return -EINVAL; | |
2482 | } | |
2483 | } | |
2484 | ||
d342894c | 2485 | return 0; |
2486 | } | |
2487 | ||
1b13c97f YB |
2488 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2489 | struct ethtool_drvinfo *drvinfo) | |
2490 | { | |
2491 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2492 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2493 | } | |
2494 | ||
2495 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2496 | .get_drvinfo = vxlan_get_drvinfo, | |
2497 | .get_link = ethtool_op_get_link, | |
2498 | }; | |
2499 | ||
553675fb | 2500 | static void vxlan_del_work(struct work_struct *work) |
2501 | { | |
2502 | struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); | |
acbf74a7 | 2503 | udp_tunnel_sock_release(vs->sock); |
553675fb | 2504 | kfree_rcu(vs, rcu); |
2505 | } | |
2506 | ||
3ee64f39 TH |
2507 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2508 | __be16 port, u32 flags) | |
553675fb | 2509 | { |
e4c7ed41 | 2510 | struct socket *sock; |
3ee64f39 TH |
2511 | struct udp_port_cfg udp_conf; |
2512 | int err; | |
e4c7ed41 | 2513 | |
3ee64f39 | 2514 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2515 | |
3ee64f39 TH |
2516 | if (ipv6) { |
2517 | udp_conf.family = AF_INET6; | |
3ee64f39 | 2518 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 2519 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
3ee64f39 TH |
2520 | } else { |
2521 | udp_conf.family = AF_INET; | |
e4c7ed41 | 2522 | } |
e4c7ed41 | 2523 | |
3ee64f39 | 2524 | udp_conf.local_udp_port = port; |
553675fb | 2525 | |
3ee64f39 TH |
2526 | /* Open UDP socket */ |
2527 | err = udp_sock_create(net, &udp_conf, &sock); | |
2528 | if (err < 0) | |
2529 | return ERR_PTR(err); | |
e4c7ed41 | 2530 | |
39deb2c7 | 2531 | return sock; |
e4c7ed41 CW |
2532 | } |
2533 | ||
2534 | /* Create new listen socket if needed */ | |
2535 | static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, | |
359a0ea9 TH |
2536 | vxlan_rcv_t *rcv, void *data, |
2537 | u32 flags) | |
e4c7ed41 CW |
2538 | { |
2539 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2540 | struct vxlan_sock *vs; | |
2541 | struct socket *sock; | |
e4c7ed41 | 2542 | unsigned int h; |
359a0ea9 | 2543 | bool ipv6 = !!(flags & VXLAN_F_IPV6); |
acbf74a7 | 2544 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 2545 | |
dc01e7d3 | 2546 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2547 | if (!vs) |
2548 | return ERR_PTR(-ENOMEM); | |
2549 | ||
2550 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2551 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2552 | ||
2553 | INIT_WORK(&vs->del_work, vxlan_del_work); | |
2554 | ||
3ee64f39 | 2555 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 2556 | if (IS_ERR(sock)) { |
553675fb | 2557 | kfree(vs); |
e50fddc8 | 2558 | return ERR_CAST(sock); |
553675fb | 2559 | } |
e4c7ed41 CW |
2560 | |
2561 | vs->sock = sock; | |
9c2e24e1 | 2562 | atomic_set(&vs->refcnt, 1); |
5cfccc5a | 2563 | vs->rcv = rcv; |
012a5729 | 2564 | vs->data = data; |
af33c1ad | 2565 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 2566 | |
dc01e7d3 OG |
2567 | /* Initialize the vxlan udp offloads structure */ |
2568 | vs->udp_offloads.port = port; | |
2569 | vs->udp_offloads.callbacks.gro_receive = vxlan_gro_receive; | |
2570 | vs->udp_offloads.callbacks.gro_complete = vxlan_gro_complete; | |
2571 | ||
9c2e24e1 PS |
2572 | spin_lock(&vn->sock_lock); |
2573 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
dc01e7d3 | 2574 | vxlan_notify_add_rx_port(vs); |
9c2e24e1 | 2575 | spin_unlock(&vn->sock_lock); |
553675fb | 2576 | |
2577 | /* Mark socket as an encapsulation socket. */ | |
acbf74a7 AZ |
2578 | tunnel_cfg.sk_user_data = vs; |
2579 | tunnel_cfg.encap_type = 1; | |
2580 | tunnel_cfg.encap_rcv = vxlan_udp_encap_recv; | |
2581 | tunnel_cfg.encap_destroy = NULL; | |
2582 | ||
2583 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 2584 | |
9c2e24e1 PS |
2585 | return vs; |
2586 | } | |
2587 | ||
012a5729 PS |
2588 | struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, |
2589 | vxlan_rcv_t *rcv, void *data, | |
359a0ea9 | 2590 | bool no_share, u32 flags) |
9c2e24e1 PS |
2591 | { |
2592 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2593 | struct vxlan_sock *vs; | |
19ca9fc1 | 2594 | bool ipv6 = flags & VXLAN_F_IPV6; |
9c2e24e1 | 2595 | |
359a0ea9 | 2596 | vs = vxlan_socket_create(net, port, rcv, data, flags); |
9c2e24e1 PS |
2597 | if (!IS_ERR(vs)) |
2598 | return vs; | |
553675fb | 2599 | |
012a5729 PS |
2600 | if (no_share) /* Return error if sharing is not allowed. */ |
2601 | return vs; | |
2602 | ||
9c2e24e1 | 2603 | spin_lock(&vn->sock_lock); |
ac5132d1 | 2604 | vs = vxlan_find_sock(net, ipv6 ? AF_INET6 : AF_INET, port, flags); |
00c83b01 ML |
2605 | if (vs && ((vs->rcv != rcv) || |
2606 | !atomic_add_unless(&vs->refcnt, 1, 0))) | |
5cfccc5a | 2607 | vs = ERR_PTR(-EBUSY); |
5cfccc5a PS |
2608 | spin_unlock(&vn->sock_lock); |
2609 | ||
2610 | if (!vs) | |
9c2e24e1 PS |
2611 | vs = ERR_PTR(-EINVAL); |
2612 | ||
553675fb | 2613 | return vs; |
2614 | } | |
012a5729 | 2615 | EXPORT_SYMBOL_GPL(vxlan_sock_add); |
553675fb | 2616 | |
1c51a915 SH |
2617 | /* Scheduled at device creation to bind to a socket */ |
2618 | static void vxlan_sock_work(struct work_struct *work) | |
2619 | { | |
9c2e24e1 | 2620 | struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, sock_work); |
f01ec1c0 | 2621 | struct net *net = vxlan->net; |
1c51a915 | 2622 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); |
9c2e24e1 PS |
2623 | __be16 port = vxlan->dst_port; |
2624 | struct vxlan_sock *nvs; | |
1c51a915 | 2625 | |
359a0ea9 | 2626 | nvs = vxlan_sock_add(net, port, vxlan_rcv, NULL, false, vxlan->flags); |
1c51a915 | 2627 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2628 | if (!IS_ERR(nvs)) |
2629 | vxlan_vs_add_dev(nvs, vxlan); | |
2630 | spin_unlock(&vn->sock_lock); | |
2631 | ||
2632 | dev_put(vxlan->dev); | |
1c51a915 SH |
2633 | } |
2634 | ||
33564bbb | 2635 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, |
d342894c | 2636 | struct nlattr *tb[], struct nlattr *data[]) |
2637 | { | |
33564bbb | 2638 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
d342894c | 2639 | struct vxlan_dev *vxlan = netdev_priv(dev); |
c7995c43 | 2640 | struct vxlan_rdst *dst = &vxlan->default_dst; |
d342894c | 2641 | __u32 vni; |
2642 | int err; | |
e4c7ed41 | 2643 | bool use_ipv6 = false; |
d342894c | 2644 | |
2645 | if (!data[IFLA_VXLAN_ID]) | |
2646 | return -EINVAL; | |
2647 | ||
33564bbb | 2648 | vxlan->net = src_net; |
f01ec1c0 | 2649 | |
d342894c | 2650 | vni = nla_get_u32(data[IFLA_VXLAN_ID]); |
c7995c43 | 2651 | dst->remote_vni = vni; |
d342894c | 2652 | |
5933a7bb MR |
2653 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2654 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 CW |
2655 | if (data[IFLA_VXLAN_GROUP]) { |
2656 | dst->remote_ip.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_GROUP]); | |
e4c7ed41 CW |
2657 | } else if (data[IFLA_VXLAN_GROUP6]) { |
2658 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2659 | return -EPFNOSUPPORT; | |
2660 | ||
2661 | nla_memcpy(&dst->remote_ip.sin6.sin6_addr, data[IFLA_VXLAN_GROUP6], | |
2662 | sizeof(struct in6_addr)); | |
2663 | dst->remote_ip.sa.sa_family = AF_INET6; | |
2664 | use_ipv6 = true; | |
2665 | } | |
d342894c | 2666 | |
e4c7ed41 CW |
2667 | if (data[IFLA_VXLAN_LOCAL]) { |
2668 | vxlan->saddr.sin.sin_addr.s_addr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); | |
2669 | vxlan->saddr.sa.sa_family = AF_INET; | |
2670 | } else if (data[IFLA_VXLAN_LOCAL6]) { | |
2671 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2672 | return -EPFNOSUPPORT; | |
2673 | ||
2674 | /* TODO: respect scope id */ | |
2675 | nla_memcpy(&vxlan->saddr.sin6.sin6_addr, data[IFLA_VXLAN_LOCAL6], | |
2676 | sizeof(struct in6_addr)); | |
2677 | vxlan->saddr.sa.sa_family = AF_INET6; | |
2678 | use_ipv6 = true; | |
2679 | } | |
d342894c | 2680 | |
34e02aa1 | 2681 | if (data[IFLA_VXLAN_LINK] && |
c7995c43 | 2682 | (dst->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]))) { |
34e02aa1 | 2683 | struct net_device *lowerdev |
33564bbb | 2684 | = __dev_get_by_index(src_net, dst->remote_ifindex); |
34e02aa1 | 2685 | |
2686 | if (!lowerdev) { | |
c7995c43 | 2687 | pr_info("ifindex %d does not exist\n", dst->remote_ifindex); |
34e02aa1 | 2688 | return -ENODEV; |
2689 | } | |
d342894c | 2690 | |
e4c7ed41 CW |
2691 | #if IS_ENABLED(CONFIG_IPV6) |
2692 | if (use_ipv6) { | |
2693 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2694 | if (idev && idev->cnf.disable_ipv6) { | |
2695 | pr_info("IPv6 is disabled via sysctl\n"); | |
2696 | return -EPERM; | |
2697 | } | |
2698 | vxlan->flags |= VXLAN_F_IPV6; | |
2699 | } | |
2700 | #endif | |
2701 | ||
34e02aa1 | 2702 | if (!tb[IFLA_MTU]) |
e4c7ed41 | 2703 | dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
1ba56fb4 | 2704 | |
2853af6a | 2705 | dev->needed_headroom = lowerdev->hard_header_len + |
e4c7ed41 | 2706 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); |
7bda701e | 2707 | } else if (use_ipv6) |
2708 | vxlan->flags |= VXLAN_F_IPV6; | |
d342894c | 2709 | |
2710 | if (data[IFLA_VXLAN_TOS]) | |
2711 | vxlan->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); | |
2712 | ||
afb97186 VB |
2713 | if (data[IFLA_VXLAN_TTL]) |
2714 | vxlan->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); | |
2715 | ||
d342894c | 2716 | if (!data[IFLA_VXLAN_LEARNING] || nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
e4f67add | 2717 | vxlan->flags |= VXLAN_F_LEARN; |
d342894c | 2718 | |
2719 | if (data[IFLA_VXLAN_AGEING]) | |
2720 | vxlan->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
2721 | else | |
2722 | vxlan->age_interval = FDB_AGE_DEFAULT; | |
2723 | ||
e4f67add DS |
2724 | if (data[IFLA_VXLAN_PROXY] && nla_get_u8(data[IFLA_VXLAN_PROXY])) |
2725 | vxlan->flags |= VXLAN_F_PROXY; | |
2726 | ||
2727 | if (data[IFLA_VXLAN_RSC] && nla_get_u8(data[IFLA_VXLAN_RSC])) | |
2728 | vxlan->flags |= VXLAN_F_RSC; | |
2729 | ||
2730 | if (data[IFLA_VXLAN_L2MISS] && nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
2731 | vxlan->flags |= VXLAN_F_L2MISS; | |
2732 | ||
2733 | if (data[IFLA_VXLAN_L3MISS] && nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
2734 | vxlan->flags |= VXLAN_F_L3MISS; | |
2735 | ||
d342894c | 2736 | if (data[IFLA_VXLAN_LIMIT]) |
2737 | vxlan->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
2738 | ||
05f47d69 | 2739 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2740 | const struct ifla_vxlan_port_range *p | |
2741 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2742 | vxlan->port_min = ntohs(p->low); | |
2743 | vxlan->port_max = ntohs(p->high); | |
2744 | } | |
2745 | ||
823aa873 | 2746 | if (data[IFLA_VXLAN_PORT]) |
2747 | vxlan->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
2748 | ||
359a0ea9 TH |
2749 | if (data[IFLA_VXLAN_UDP_CSUM] && nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) |
2750 | vxlan->flags |= VXLAN_F_UDP_CSUM; | |
2751 | ||
2752 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && | |
2753 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
2754 | vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; | |
2755 | ||
2756 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && | |
2757 | nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
2758 | vxlan->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; | |
2759 | ||
dfd8645e TH |
2760 | if (data[IFLA_VXLAN_REMCSUM_TX] && |
2761 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
2762 | vxlan->flags |= VXLAN_F_REMCSUM_TX; | |
2763 | ||
2764 | if (data[IFLA_VXLAN_REMCSUM_RX] && | |
2765 | nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
2766 | vxlan->flags |= VXLAN_F_REMCSUM_RX; | |
2767 | ||
3511494c TG |
2768 | if (data[IFLA_VXLAN_GBP]) |
2769 | vxlan->flags |= VXLAN_F_GBP; | |
2770 | ||
0ace2ca8 TH |
2771 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) |
2772 | vxlan->flags |= VXLAN_F_REMCSUM_NOPARTIAL; | |
2773 | ||
33564bbb | 2774 | if (vxlan_find_vni(src_net, vni, use_ipv6 ? AF_INET6 : AF_INET, |
ac5132d1 | 2775 | vxlan->dst_port, vxlan->flags)) { |
553675fb | 2776 | pr_info("duplicate VNI %u\n", vni); |
2777 | return -EEXIST; | |
2778 | } | |
2779 | ||
7ad24ea4 | 2780 | dev->ethtool_ops = &vxlan_ethtool_ops; |
1b13c97f | 2781 | |
2936b6ab SS |
2782 | /* create an fdb entry for a valid default destination */ |
2783 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
2784 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
2785 | &vxlan->default_dst.remote_ip, | |
2786 | NUD_REACHABLE|NUD_PERMANENT, | |
2787 | NLM_F_EXCL|NLM_F_CREATE, | |
2788 | vxlan->dst_port, | |
2789 | vxlan->default_dst.remote_vni, | |
2790 | vxlan->default_dst.remote_ifindex, | |
2791 | NTF_SELF); | |
2792 | if (err) | |
2793 | return err; | |
2794 | } | |
d342894c | 2795 | |
afbd8bae MR |
2796 | err = register_netdevice(dev); |
2797 | if (err) { | |
ba609e9b | 2798 | vxlan_fdb_delete_default(vxlan); |
afbd8bae MR |
2799 | return err; |
2800 | } | |
2801 | ||
553675fb | 2802 | list_add(&vxlan->next, &vn->vxlan_list); |
553675fb | 2803 | |
2804 | return 0; | |
d342894c | 2805 | } |
2806 | ||
2807 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
2808 | { | |
2809 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2810 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 2811 | |
fe5c3561 | 2812 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
2813 | if (!hlist_unhashed(&vxlan->hlist)) |
2814 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 2815 | spin_unlock(&vn->sock_lock); |
2816 | ||
553675fb | 2817 | list_del(&vxlan->next); |
d342894c | 2818 | unregister_netdevice_queue(dev, head); |
2819 | } | |
2820 | ||
2821 | static size_t vxlan_get_size(const struct net_device *dev) | |
2822 | { | |
2823 | ||
2824 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 2825 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 2826 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 2827 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 2828 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
2829 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
2830 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ | |
e4f67add DS |
2831 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
2832 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
2833 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
2834 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
d342894c | 2835 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
2836 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 2837 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
2838 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
2839 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
2840 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
2841 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
2842 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
2843 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 2844 | 0; |
2845 | } | |
2846 | ||
2847 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
2848 | { | |
2849 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 2850 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 2851 | struct ifla_vxlan_port_range ports = { |
2852 | .low = htons(vxlan->port_min), | |
2853 | .high = htons(vxlan->port_max), | |
2854 | }; | |
d342894c | 2855 | |
c7995c43 | 2856 | if (nla_put_u32(skb, IFLA_VXLAN_ID, dst->remote_vni)) |
d342894c | 2857 | goto nla_put_failure; |
2858 | ||
e4c7ed41 CW |
2859 | if (!vxlan_addr_any(&dst->remote_ip)) { |
2860 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
2861 | if (nla_put_be32(skb, IFLA_VXLAN_GROUP, | |
2862 | dst->remote_ip.sin.sin_addr.s_addr)) | |
2863 | goto nla_put_failure; | |
2864 | #if IS_ENABLED(CONFIG_IPV6) | |
2865 | } else { | |
2866 | if (nla_put(skb, IFLA_VXLAN_GROUP6, sizeof(struct in6_addr), | |
2867 | &dst->remote_ip.sin6.sin6_addr)) | |
2868 | goto nla_put_failure; | |
2869 | #endif | |
2870 | } | |
2871 | } | |
d342894c | 2872 | |
c7995c43 | 2873 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 2874 | goto nla_put_failure; |
2875 | ||
e4c7ed41 CW |
2876 | if (!vxlan_addr_any(&vxlan->saddr)) { |
2877 | if (vxlan->saddr.sa.sa_family == AF_INET) { | |
2878 | if (nla_put_be32(skb, IFLA_VXLAN_LOCAL, | |
2879 | vxlan->saddr.sin.sin_addr.s_addr)) | |
2880 | goto nla_put_failure; | |
2881 | #if IS_ENABLED(CONFIG_IPV6) | |
2882 | } else { | |
2883 | if (nla_put(skb, IFLA_VXLAN_LOCAL6, sizeof(struct in6_addr), | |
2884 | &vxlan->saddr.sin6.sin6_addr)) | |
2885 | goto nla_put_failure; | |
2886 | #endif | |
2887 | } | |
2888 | } | |
d342894c | 2889 | |
2890 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->ttl) || | |
2891 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->tos) || | |
e4f67add DS |
2892 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
2893 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
2894 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
2895 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
2896 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
2897 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
2898 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
2899 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
2900 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
d342894c | 2901 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->age_interval) || |
823aa873 | 2902 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->addrmax) || |
359a0ea9 TH |
2903 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->dst_port) || |
2904 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, | |
2905 | !!(vxlan->flags & VXLAN_F_UDP_CSUM)) || | |
2906 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, | |
2907 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
2908 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
dfd8645e TH |
2909 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
2910 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, | |
2911 | !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) || | |
2912 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, | |
2913 | !!(vxlan->flags & VXLAN_F_REMCSUM_RX))) | |
d342894c | 2914 | goto nla_put_failure; |
2915 | ||
05f47d69 | 2916 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
2917 | goto nla_put_failure; | |
2918 | ||
3511494c TG |
2919 | if (vxlan->flags & VXLAN_F_GBP && |
2920 | nla_put_flag(skb, IFLA_VXLAN_GBP)) | |
2921 | goto nla_put_failure; | |
2922 | ||
0ace2ca8 TH |
2923 | if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL && |
2924 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) | |
2925 | goto nla_put_failure; | |
2926 | ||
d342894c | 2927 | return 0; |
2928 | ||
2929 | nla_put_failure: | |
2930 | return -EMSGSIZE; | |
2931 | } | |
2932 | ||
1728d4fa ND |
2933 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
2934 | { | |
2935 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2936 | ||
2937 | return vxlan->net; | |
2938 | } | |
2939 | ||
d342894c | 2940 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
2941 | .kind = "vxlan", | |
2942 | .maxtype = IFLA_VXLAN_MAX, | |
2943 | .policy = vxlan_policy, | |
2944 | .priv_size = sizeof(struct vxlan_dev), | |
2945 | .setup = vxlan_setup, | |
2946 | .validate = vxlan_validate, | |
2947 | .newlink = vxlan_newlink, | |
2948 | .dellink = vxlan_dellink, | |
2949 | .get_size = vxlan_get_size, | |
2950 | .fill_info = vxlan_fill_info, | |
1728d4fa | 2951 | .get_link_net = vxlan_get_link_net, |
d342894c | 2952 | }; |
2953 | ||
acaf4e70 DB |
2954 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
2955 | struct net_device *dev) | |
2956 | { | |
2957 | struct vxlan_dev *vxlan, *next; | |
2958 | LIST_HEAD(list_kill); | |
2959 | ||
2960 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
2961 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2962 | ||
2963 | /* In case we created vxlan device with carrier | |
2964 | * and we loose the carrier due to module unload | |
2965 | * we also need to remove vxlan device. In other | |
2966 | * cases, it's not necessary and remote_ifindex | |
2967 | * is 0 here, so no matches. | |
2968 | */ | |
2969 | if (dst->remote_ifindex == dev->ifindex) | |
2970 | vxlan_dellink(vxlan->dev, &list_kill); | |
2971 | } | |
2972 | ||
2973 | unregister_netdevice_many(&list_kill); | |
2974 | } | |
2975 | ||
2976 | static int vxlan_lowerdev_event(struct notifier_block *unused, | |
2977 | unsigned long event, void *ptr) | |
2978 | { | |
2979 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 2980 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 2981 | |
783c1463 | 2982 | if (event == NETDEV_UNREGISTER) |
acaf4e70 DB |
2983 | vxlan_handle_lowerdev_unregister(vn, dev); |
2984 | ||
2985 | return NOTIFY_DONE; | |
2986 | } | |
2987 | ||
2988 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
2989 | .notifier_call = vxlan_lowerdev_event, | |
2990 | }; | |
2991 | ||
d342894c | 2992 | static __net_init int vxlan_init_net(struct net *net) |
2993 | { | |
2994 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 2995 | unsigned int h; |
d342894c | 2996 | |
553675fb | 2997 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 2998 | spin_lock_init(&vn->sock_lock); |
d342894c | 2999 | |
553675fb | 3000 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
3001 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 3002 | |
3003 | return 0; | |
3004 | } | |
3005 | ||
f01ec1c0 ND |
3006 | static void __net_exit vxlan_exit_net(struct net *net) |
3007 | { | |
3008 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3009 | struct vxlan_dev *vxlan, *next; | |
3010 | struct net_device *dev, *aux; | |
3011 | LIST_HEAD(list); | |
3012 | ||
3013 | rtnl_lock(); | |
3014 | for_each_netdev_safe(net, dev, aux) | |
3015 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
3016 | unregister_netdevice_queue(dev, &list); | |
3017 | ||
3018 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3019 | /* If vxlan->dev is in the same netns, it has already been added | |
3020 | * to the list by the previous loop. | |
3021 | */ | |
3022 | if (!net_eq(dev_net(vxlan->dev), net)) | |
3023 | unregister_netdevice_queue(dev, &list); | |
3024 | } | |
3025 | ||
3026 | unregister_netdevice_many(&list); | |
3027 | rtnl_unlock(); | |
3028 | } | |
3029 | ||
d342894c | 3030 | static struct pernet_operations vxlan_net_ops = { |
3031 | .init = vxlan_init_net, | |
f01ec1c0 | 3032 | .exit = vxlan_exit_net, |
d342894c | 3033 | .id = &vxlan_net_id, |
3034 | .size = sizeof(struct vxlan_net), | |
3035 | }; | |
3036 | ||
3037 | static int __init vxlan_init_module(void) | |
3038 | { | |
3039 | int rc; | |
3040 | ||
758c57d1 SH |
3041 | vxlan_wq = alloc_workqueue("vxlan", 0, 0); |
3042 | if (!vxlan_wq) | |
3043 | return -ENOMEM; | |
3044 | ||
d342894c | 3045 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); |
3046 | ||
783c1463 | 3047 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 3048 | if (rc) |
3049 | goto out1; | |
3050 | ||
acaf4e70 | 3051 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 3052 | if (rc) |
3053 | goto out2; | |
3054 | ||
acaf4e70 DB |
3055 | rc = rtnl_link_register(&vxlan_link_ops); |
3056 | if (rc) | |
3057 | goto out3; | |
d342894c | 3058 | |
acaf4e70 DB |
3059 | return 0; |
3060 | out3: | |
3061 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 3062 | out2: |
783c1463 | 3063 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 3064 | out1: |
758c57d1 | 3065 | destroy_workqueue(vxlan_wq); |
d342894c | 3066 | return rc; |
3067 | } | |
7332a13b | 3068 | late_initcall(vxlan_init_module); |
d342894c | 3069 | |
3070 | static void __exit vxlan_cleanup_module(void) | |
3071 | { | |
b7153984 | 3072 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 3073 | unregister_netdevice_notifier(&vxlan_notifier_block); |
758c57d1 | 3074 | destroy_workqueue(vxlan_wq); |
783c1463 DB |
3075 | unregister_pernet_subsys(&vxlan_net_ops); |
3076 | /* rcu_barrier() is called by netns */ | |
d342894c | 3077 | } |
3078 | module_exit(vxlan_cleanup_module); | |
3079 | ||
3080 | MODULE_LICENSE("GPL"); | |
3081 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 3082 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 3083 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 3084 | MODULE_ALIAS_RTNL_LINK("vxlan"); |