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Commit | Line | Data |
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d342894c | 1 | /* |
eb5ce439 | 2 | * VXLAN: Virtual eXtensible Local Area Network |
d342894c | 3 | * |
3b8df3c6 | 4 | * Copyright (c) 2012-2013 Vyatta Inc. |
d342894c | 5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
d342894c | 9 | */ |
10 | ||
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
d342894c | 14 | #include <linux/module.h> |
15 | #include <linux/errno.h> | |
16 | #include <linux/slab.h> | |
d342894c | 17 | #include <linux/udp.h> |
18 | #include <linux/igmp.h> | |
d342894c | 19 | #include <linux/if_ether.h> |
1b13c97f | 20 | #include <linux/ethtool.h> |
e4f67add DS |
21 | #include <net/arp.h> |
22 | #include <net/ndisc.h> | |
d342894c | 23 | #include <net/ip.h> |
24 | #include <net/icmp.h> | |
d342894c | 25 | #include <net/rtnetlink.h> |
d342894c | 26 | #include <net/inet_ecn.h> |
27 | #include <net/net_namespace.h> | |
28 | #include <net/netns/generic.h> | |
012a5729 | 29 | #include <net/vxlan.h> |
40d29af0 | 30 | |
e4c7ed41 | 31 | #if IS_ENABLED(CONFIG_IPV6) |
e4c7ed41 | 32 | #include <net/ip6_tunnel.h> |
660d98ca | 33 | #include <net/ip6_checksum.h> |
e4c7ed41 | 34 | #endif |
d342894c | 35 | |
36 | #define VXLAN_VERSION "0.1" | |
37 | ||
553675fb | 38 | #define PORT_HASH_BITS 8 |
39 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 40 | #define FDB_AGE_DEFAULT 300 /* 5 min */ |
41 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
42 | ||
23c578bf | 43 | /* UDP port for VXLAN traffic. |
44 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 45 | * for compatibility with early adopters. |
23c578bf | 46 | */ |
9daaa397 SH |
47 | static unsigned short vxlan_port __read_mostly = 8472; |
48 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 49 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
50 | ||
51 | static bool log_ecn_error = true; | |
52 | module_param(log_ecn_error, bool, 0644); | |
53 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
54 | ||
c7d03a00 | 55 | static unsigned int vxlan_net_id; |
0dfbdf41 | 56 | static struct rtnl_link_ops vxlan_link_ops; |
553675fb | 57 | |
7256eac1 | 58 | static const u8 all_zeros_mac[ETH_ALEN + 2]; |
afbd8bae | 59 | |
205f356d | 60 | static int vxlan_sock_add(struct vxlan_dev *vxlan); |
614732ea | 61 | |
a53cb29b MB |
62 | static void vxlan_vs_del_dev(struct vxlan_dev *vxlan); |
63 | ||
553675fb | 64 | /* per-network namespace private data for this module */ |
65 | struct vxlan_net { | |
66 | struct list_head vxlan_list; | |
67 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 68 | spinlock_t sock_lock; |
553675fb | 69 | }; |
70 | ||
d342894c | 71 | /* Forwarding table entry */ |
72 | struct vxlan_fdb { | |
73 | struct hlist_node hlist; /* linked list of entries */ | |
74 | struct rcu_head rcu; | |
75 | unsigned long updated; /* jiffies */ | |
76 | unsigned long used; | |
3e61aa8f | 77 | struct list_head remotes; |
7177a3b0 | 78 | u8 eth_addr[ETH_ALEN]; |
d342894c | 79 | u16 state; /* see ndm_state */ |
3ad7a4b1 | 80 | __be32 vni; |
ae884082 | 81 | u8 flags; /* see ndm_flags */ |
d342894c | 82 | }; |
83 | ||
d342894c | 84 | /* salt for hash table */ |
85 | static u32 vxlan_salt __read_mostly; | |
86 | ||
ee122c79 TG |
87 | static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
88 | { | |
e7030878 TG |
89 | return vs->flags & VXLAN_F_COLLECT_METADATA || |
90 | ip_tunnel_collect_metadata(); | |
ee122c79 TG |
91 | } |
92 | ||
e4c7ed41 CW |
93 | #if IS_ENABLED(CONFIG_IPV6) |
94 | static inline | |
95 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
96 | { | |
f0ef3126 JB |
97 | if (a->sa.sa_family != b->sa.sa_family) |
98 | return false; | |
99 | if (a->sa.sa_family == AF_INET6) | |
100 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
101 | else | |
102 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
e4c7ed41 CW |
103 | } |
104 | ||
105 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
106 | { | |
f0ef3126 JB |
107 | if (ipa->sa.sa_family == AF_INET6) |
108 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
109 | else | |
110 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
e4c7ed41 CW |
111 | } |
112 | ||
113 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
114 | { | |
f0ef3126 JB |
115 | if (ipa->sa.sa_family == AF_INET6) |
116 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
117 | else | |
118 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
e4c7ed41 CW |
119 | } |
120 | ||
121 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
122 | { | |
f0ef3126 | 123 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
67b61f6c | 124 | ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
f0ef3126 JB |
125 | ip->sa.sa_family = AF_INET6; |
126 | return 0; | |
127 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 128 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
129 | ip->sa.sa_family = AF_INET; |
130 | return 0; | |
131 | } else { | |
132 | return -EAFNOSUPPORT; | |
133 | } | |
e4c7ed41 CW |
134 | } |
135 | ||
136 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 137 | const union vxlan_addr *ip) |
e4c7ed41 | 138 | { |
f0ef3126 | 139 | if (ip->sa.sa_family == AF_INET6) |
930345ea | 140 | return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
f0ef3126 | 141 | else |
930345ea | 142 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
143 | } |
144 | ||
145 | #else /* !CONFIG_IPV6 */ | |
146 | ||
147 | static inline | |
148 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
149 | { | |
f0ef3126 | 150 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
e4c7ed41 CW |
151 | } |
152 | ||
153 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
154 | { | |
f0ef3126 | 155 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); |
e4c7ed41 CW |
156 | } |
157 | ||
158 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
159 | { | |
f0ef3126 | 160 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); |
e4c7ed41 CW |
161 | } |
162 | ||
163 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
164 | { | |
f0ef3126 JB |
165 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
166 | return -EAFNOSUPPORT; | |
167 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 168 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
169 | ip->sa.sa_family = AF_INET; |
170 | return 0; | |
171 | } else { | |
172 | return -EAFNOSUPPORT; | |
173 | } | |
e4c7ed41 CW |
174 | } |
175 | ||
176 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 177 | const union vxlan_addr *ip) |
e4c7ed41 | 178 | { |
930345ea | 179 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
180 | } |
181 | #endif | |
182 | ||
553675fb | 183 | /* Virtual Network hash table head */ |
54bfd872 | 184 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni) |
553675fb | 185 | { |
54bfd872 | 186 | return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)]; |
553675fb | 187 | } |
188 | ||
189 | /* Socket hash table head */ | |
190 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 191 | { |
192 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
193 | ||
553675fb | 194 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
195 | } | |
196 | ||
3e61aa8f SH |
197 | /* First remote destination for a forwarding entry. |
198 | * Guaranteed to be non-NULL because remotes are never deleted. | |
199 | */ | |
5ca5461c | 200 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 201 | { |
5ca5461c | 202 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
203 | } | |
204 | ||
205 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
206 | { | |
207 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
208 | } |
209 | ||
ac5132d1 TG |
210 | /* Find VXLAN socket based on network namespace, address family and UDP port |
211 | * and enabled unshareable flags. | |
212 | */ | |
213 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
214 | __be16 port, u32 flags) | |
553675fb | 215 | { |
216 | struct vxlan_sock *vs; | |
af33c1ad TH |
217 | |
218 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 219 | |
220 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 221 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
705cc62f | 222 | vxlan_get_sk_family(vs) == family && |
af33c1ad | 223 | vs->flags == flags) |
553675fb | 224 | return vs; |
225 | } | |
226 | return NULL; | |
d342894c | 227 | } |
228 | ||
54bfd872 | 229 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, __be32 vni) |
d342894c | 230 | { |
231 | struct vxlan_dev *vxlan; | |
d342894c | 232 | |
b9167b2e JB |
233 | /* For flow based devices, map all packets to VNI 0 */ |
234 | if (vs->flags & VXLAN_F_COLLECT_METADATA) | |
235 | vni = 0; | |
236 | ||
54bfd872 JB |
237 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, vni), hlist) { |
238 | if (vxlan->default_dst.remote_vni == vni) | |
d342894c | 239 | return vxlan; |
240 | } | |
241 | ||
242 | return NULL; | |
243 | } | |
244 | ||
5cfccc5a | 245 | /* Look up VNI in a per net namespace table */ |
54bfd872 | 246 | static struct vxlan_dev *vxlan_find_vni(struct net *net, __be32 vni, |
ac5132d1 TG |
247 | sa_family_t family, __be16 port, |
248 | u32 flags) | |
5cfccc5a PS |
249 | { |
250 | struct vxlan_sock *vs; | |
251 | ||
ac5132d1 | 252 | vs = vxlan_find_sock(net, family, port, flags); |
5cfccc5a PS |
253 | if (!vs) |
254 | return NULL; | |
255 | ||
54bfd872 | 256 | return vxlan_vs_find_vni(vs, vni); |
5cfccc5a PS |
257 | } |
258 | ||
d342894c | 259 | /* Fill in neighbour message in skbuff. */ |
260 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
261 | const struct vxlan_fdb *fdb, |
262 | u32 portid, u32 seq, int type, unsigned int flags, | |
263 | const struct vxlan_rdst *rdst) | |
d342894c | 264 | { |
265 | unsigned long now = jiffies; | |
266 | struct nda_cacheinfo ci; | |
267 | struct nlmsghdr *nlh; | |
268 | struct ndmsg *ndm; | |
e4f67add | 269 | bool send_ip, send_eth; |
d342894c | 270 | |
271 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
272 | if (nlh == NULL) | |
273 | return -EMSGSIZE; | |
274 | ||
275 | ndm = nlmsg_data(nlh); | |
276 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
277 | |
278 | send_eth = send_ip = true; | |
279 | ||
280 | if (type == RTM_GETNEIGH) { | |
e4c7ed41 | 281 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add | 282 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
8f48ba71 | 283 | ndm->ndm_family = send_ip ? rdst->remote_ip.sa.sa_family : AF_INET; |
e4f67add DS |
284 | } else |
285 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 286 | ndm->ndm_state = fdb->state; |
287 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 288 | ndm->ndm_flags = fdb->flags; |
545469f7 | 289 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 290 | |
193523bf | 291 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 292 | nla_put_s32(skb, NDA_LINK_NETNSID, |
38f507f1 | 293 | peernet2id(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
294 | goto nla_put_failure; |
295 | ||
e4f67add | 296 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 297 | goto nla_put_failure; |
298 | ||
e4c7ed41 | 299 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
300 | goto nla_put_failure; |
301 | ||
0dfbdf41 | 302 | if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && |
6681712d DS |
303 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
304 | goto nla_put_failure; | |
c7995c43 | 305 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
54bfd872 | 306 | nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni))) |
6681712d | 307 | goto nla_put_failure; |
3ad7a4b1 RP |
308 | if ((vxlan->flags & VXLAN_F_COLLECT_METADATA) && fdb->vni && |
309 | nla_put_u32(skb, NDA_SRC_VNI, | |
310 | be32_to_cpu(fdb->vni))) | |
311 | goto nla_put_failure; | |
6681712d DS |
312 | if (rdst->remote_ifindex && |
313 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 314 | goto nla_put_failure; |
315 | ||
316 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
317 | ci.ndm_confirmed = 0; | |
318 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
319 | ci.ndm_refcnt = 0; | |
320 | ||
321 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
322 | goto nla_put_failure; | |
323 | ||
053c095a JB |
324 | nlmsg_end(skb, nlh); |
325 | return 0; | |
d342894c | 326 | |
327 | nla_put_failure: | |
328 | nlmsg_cancel(skb, nlh); | |
329 | return -EMSGSIZE; | |
330 | } | |
331 | ||
332 | static inline size_t vxlan_nlmsg_size(void) | |
333 | { | |
334 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
335 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 336 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 337 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
338 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
339 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 340 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 341 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
342 | } | |
343 | ||
9e4b93f9 ND |
344 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
345 | struct vxlan_rdst *rd, int type) | |
d342894c | 346 | { |
347 | struct net *net = dev_net(vxlan->dev); | |
348 | struct sk_buff *skb; | |
349 | int err = -ENOBUFS; | |
350 | ||
351 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
352 | if (skb == NULL) | |
353 | goto errout; | |
354 | ||
9e4b93f9 | 355 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 356 | if (err < 0) { |
357 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
358 | WARN_ON(err == -EMSGSIZE); | |
359 | kfree_skb(skb); | |
360 | goto errout; | |
361 | } | |
362 | ||
363 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
364 | return; | |
365 | errout: | |
366 | if (err < 0) | |
367 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
368 | } | |
369 | ||
e4c7ed41 | 370 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
371 | { |
372 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
373 | struct vxlan_fdb f = { |
374 | .state = NUD_STALE, | |
375 | }; | |
376 | struct vxlan_rdst remote = { | |
e4c7ed41 | 377 | .remote_ip = *ipa, /* goes to NDA_DST */ |
54bfd872 | 378 | .remote_vni = cpu_to_be32(VXLAN_N_VID), |
bb3fd687 | 379 | }; |
3e61aa8f | 380 | |
9e4b93f9 | 381 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
382 | } |
383 | ||
384 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
385 | { | |
bb3fd687 SH |
386 | struct vxlan_fdb f = { |
387 | .state = NUD_STALE, | |
388 | }; | |
9e4b93f9 | 389 | struct vxlan_rdst remote = { }; |
e4f67add | 390 | |
e4f67add DS |
391 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
392 | ||
9e4b93f9 | 393 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
394 | } |
395 | ||
d342894c | 396 | /* Hash Ethernet address */ |
397 | static u32 eth_hash(const unsigned char *addr) | |
398 | { | |
399 | u64 value = get_unaligned((u64 *)addr); | |
400 | ||
401 | /* only want 6 bytes */ | |
402 | #ifdef __BIG_ENDIAN | |
d342894c | 403 | value >>= 16; |
321fb991 | 404 | #else |
405 | value <<= 16; | |
d342894c | 406 | #endif |
407 | return hash_64(value, FDB_HASH_BITS); | |
408 | } | |
409 | ||
3ad7a4b1 RP |
410 | static u32 eth_vni_hash(const unsigned char *addr, __be32 vni) |
411 | { | |
412 | /* use 1 byte of OUI and 3 bytes of NIC */ | |
413 | u32 key = get_unaligned((u32 *)(addr + 2)); | |
414 | ||
415 | return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1); | |
416 | } | |
417 | ||
d342894c | 418 | /* Hash chain to use given mac address */ |
419 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
3ad7a4b1 | 420 | const u8 *mac, __be32 vni) |
d342894c | 421 | { |
3ad7a4b1 RP |
422 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA) |
423 | return &vxlan->fdb_head[eth_vni_hash(mac, vni)]; | |
424 | else | |
425 | return &vxlan->fdb_head[eth_hash(mac)]; | |
d342894c | 426 | } |
427 | ||
428 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 429 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 430 | const u8 *mac, __be32 vni) |
d342894c | 431 | { |
3ad7a4b1 | 432 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni); |
d342894c | 433 | struct vxlan_fdb *f; |
d342894c | 434 | |
b67bfe0d | 435 | hlist_for_each_entry_rcu(f, head, hlist) { |
3ad7a4b1 RP |
436 | if (ether_addr_equal(mac, f->eth_addr)) { |
437 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA) { | |
438 | if (vni == f->vni) | |
439 | return f; | |
440 | } else { | |
441 | return f; | |
442 | } | |
443 | } | |
d342894c | 444 | } |
445 | ||
446 | return NULL; | |
447 | } | |
448 | ||
014be2c8 | 449 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 450 | const u8 *mac, __be32 vni) |
014be2c8 SS |
451 | { |
452 | struct vxlan_fdb *f; | |
453 | ||
3ad7a4b1 | 454 | f = __vxlan_find_mac(vxlan, mac, vni); |
014be2c8 SS |
455 | if (f) |
456 | f->used = jiffies; | |
457 | ||
458 | return f; | |
459 | } | |
460 | ||
a5e7c10a MR |
461 | /* caller should hold vxlan->hash_lock */ |
462 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 463 | union vxlan_addr *ip, __be16 port, |
54bfd872 | 464 | __be32 vni, __u32 ifindex) |
6681712d | 465 | { |
3e61aa8f | 466 | struct vxlan_rdst *rd; |
6681712d | 467 | |
3e61aa8f | 468 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 469 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
470 | rd->remote_port == port && |
471 | rd->remote_vni == vni && | |
472 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 473 | return rd; |
6681712d | 474 | } |
3e61aa8f | 475 | |
a5e7c10a MR |
476 | return NULL; |
477 | } | |
478 | ||
906dc186 TR |
479 | /* Replace destination of unicast mac */ |
480 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
54bfd872 JB |
481 | union vxlan_addr *ip, __be16 port, __be32 vni, |
482 | __u32 ifindex) | |
906dc186 TR |
483 | { |
484 | struct vxlan_rdst *rd; | |
485 | ||
486 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
487 | if (rd) | |
488 | return 0; | |
489 | ||
490 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
491 | if (!rd) | |
492 | return 0; | |
0c1d70af PA |
493 | |
494 | dst_cache_reset(&rd->dst_cache); | |
e4c7ed41 | 495 | rd->remote_ip = *ip; |
906dc186 TR |
496 | rd->remote_port = port; |
497 | rd->remote_vni = vni; | |
498 | rd->remote_ifindex = ifindex; | |
499 | return 1; | |
500 | } | |
501 | ||
a5e7c10a MR |
502 | /* Add/update destinations for multicast */ |
503 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
54bfd872 | 504 | union vxlan_addr *ip, __be16 port, __be32 vni, |
9e4b93f9 | 505 | __u32 ifindex, struct vxlan_rdst **rdp) |
a5e7c10a MR |
506 | { |
507 | struct vxlan_rdst *rd; | |
508 | ||
509 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
510 | if (rd) | |
511 | return 0; | |
512 | ||
6681712d DS |
513 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
514 | if (rd == NULL) | |
515 | return -ENOBUFS; | |
0c1d70af PA |
516 | |
517 | if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) { | |
518 | kfree(rd); | |
519 | return -ENOBUFS; | |
520 | } | |
521 | ||
e4c7ed41 | 522 | rd->remote_ip = *ip; |
6681712d DS |
523 | rd->remote_port = port; |
524 | rd->remote_vni = vni; | |
525 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
526 | |
527 | list_add_tail_rcu(&rd->list, &f->remotes); | |
528 | ||
9e4b93f9 | 529 | *rdp = rd; |
6681712d DS |
530 | return 1; |
531 | } | |
532 | ||
dfd8645e TH |
533 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
534 | unsigned int off, | |
535 | struct vxlanhdr *vh, size_t hdrlen, | |
54bfd872 JB |
536 | __be32 vni_field, |
537 | struct gro_remcsum *grc, | |
0ace2ca8 | 538 | bool nopartial) |
dfd8645e | 539 | { |
b7fe10e5 | 540 | size_t start, offset; |
dfd8645e TH |
541 | |
542 | if (skb->remcsum_offload) | |
b7fe10e5 | 543 | return vh; |
dfd8645e TH |
544 | |
545 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
546 | return NULL; | |
547 | ||
54bfd872 JB |
548 | start = vxlan_rco_start(vni_field); |
549 | offset = start + vxlan_rco_offset(vni_field); | |
dfd8645e | 550 | |
b7fe10e5 TH |
551 | vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
552 | start, offset, grc, nopartial); | |
dfd8645e TH |
553 | |
554 | skb->remcsum_offload = 1; | |
555 | ||
556 | return vh; | |
557 | } | |
558 | ||
5602c48c TH |
559 | static struct sk_buff **vxlan_gro_receive(struct sock *sk, |
560 | struct sk_buff **head, | |
561 | struct sk_buff *skb) | |
dc01e7d3 OG |
562 | { |
563 | struct sk_buff *p, **pp = NULL; | |
564 | struct vxlanhdr *vh, *vh2; | |
9b174d88 | 565 | unsigned int hlen, off_vx; |
dc01e7d3 | 566 | int flush = 1; |
5602c48c | 567 | struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk); |
54bfd872 | 568 | __be32 flags; |
26c4f7da TH |
569 | struct gro_remcsum grc; |
570 | ||
571 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
572 | |
573 | off_vx = skb_gro_offset(skb); | |
574 | hlen = off_vx + sizeof(*vh); | |
575 | vh = skb_gro_header_fast(skb, off_vx); | |
576 | if (skb_gro_header_hard(skb, hlen)) { | |
577 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
578 | if (unlikely(!vh)) | |
579 | goto out; | |
580 | } | |
dc01e7d3 | 581 | |
dfd8645e TH |
582 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
583 | ||
54bfd872 | 584 | flags = vh->vx_flags; |
dfd8645e TH |
585 | |
586 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
587 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
54bfd872 | 588 | vh->vx_vni, &grc, |
0ace2ca8 TH |
589 | !!(vs->flags & |
590 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
591 | |
592 | if (!vh) | |
593 | goto out; | |
594 | } | |
595 | ||
b7fe10e5 TH |
596 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
597 | ||
dc01e7d3 OG |
598 | for (p = *head; p; p = p->next) { |
599 | if (!NAPI_GRO_CB(p)->same_flow) | |
600 | continue; | |
601 | ||
602 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
603 | if (vh->vx_flags != vh2->vx_flags || |
604 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
605 | NAPI_GRO_CB(p)->same_flow = 0; |
606 | continue; | |
607 | } | |
dc01e7d3 OG |
608 | } |
609 | ||
fcd91dd4 | 610 | pp = call_gro_receive(eth_gro_receive, head, skb); |
c194cf93 | 611 | flush = 0; |
dc01e7d3 | 612 | |
dc01e7d3 | 613 | out: |
26c4f7da | 614 | skb_gro_remcsum_cleanup(skb, &grc); |
dc01e7d3 OG |
615 | NAPI_GRO_CB(skb)->flush |= flush; |
616 | ||
617 | return pp; | |
618 | } | |
619 | ||
5602c48c | 620 | static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff) |
dc01e7d3 | 621 | { |
229740c6 JR |
622 | /* Sets 'skb->inner_mac_header' since we are always called with |
623 | * 'skb->encapsulation' set. | |
624 | */ | |
9b174d88 | 625 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
626 | } |
627 | ||
d342894c | 628 | /* Add new entry to forwarding table -- assumes lock held */ |
629 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 630 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 631 | __u16 state, __u16 flags, |
3ad7a4b1 RP |
632 | __be16 port, __be32 src_vni, __be32 vni, |
633 | __u32 ifindex, __u8 ndm_flags) | |
d342894c | 634 | { |
9e4b93f9 | 635 | struct vxlan_rdst *rd = NULL; |
d342894c | 636 | struct vxlan_fdb *f; |
637 | int notify = 0; | |
17b46365 | 638 | int rc; |
d342894c | 639 | |
3ad7a4b1 | 640 | f = __vxlan_find_mac(vxlan, mac, src_vni); |
d342894c | 641 | if (f) { |
642 | if (flags & NLM_F_EXCL) { | |
643 | netdev_dbg(vxlan->dev, | |
644 | "lost race to create %pM\n", mac); | |
645 | return -EEXIST; | |
646 | } | |
647 | if (f->state != state) { | |
648 | f->state = state; | |
649 | f->updated = jiffies; | |
650 | notify = 1; | |
651 | } | |
ae884082 DS |
652 | if (f->flags != ndm_flags) { |
653 | f->flags = ndm_flags; | |
654 | f->updated = jiffies; | |
655 | notify = 1; | |
656 | } | |
906dc186 TR |
657 | if ((flags & NLM_F_REPLACE)) { |
658 | /* Only change unicasts */ | |
659 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
660 | is_zero_ether_addr(f->eth_addr))) { | |
60840429 | 661 | notify |= vxlan_fdb_replace(f, ip, port, vni, |
906dc186 | 662 | ifindex); |
906dc186 TR |
663 | } else |
664 | return -EOPNOTSUPP; | |
665 | } | |
6681712d | 666 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
667 | (is_multicast_ether_addr(f->eth_addr) || |
668 | is_zero_ether_addr(f->eth_addr))) { | |
17b46365 | 669 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
6681712d DS |
670 | |
671 | if (rc < 0) | |
672 | return rc; | |
673 | notify |= rc; | |
674 | } | |
d342894c | 675 | } else { |
676 | if (!(flags & NLM_F_CREATE)) | |
677 | return -ENOENT; | |
678 | ||
0dfbdf41 TG |
679 | if (vxlan->cfg.addrmax && |
680 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
d342894c | 681 | return -ENOSPC; |
682 | ||
906dc186 TR |
683 | /* Disallow replace to add a multicast entry */ |
684 | if ((flags & NLM_F_REPLACE) && | |
685 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
686 | return -EOPNOTSUPP; | |
687 | ||
e4c7ed41 | 688 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 689 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
690 | if (!f) | |
691 | return -ENOMEM; | |
692 | ||
693 | notify = 1; | |
d342894c | 694 | f->state = state; |
ae884082 | 695 | f->flags = ndm_flags; |
d342894c | 696 | f->updated = f->used = jiffies; |
3ad7a4b1 | 697 | f->vni = src_vni; |
3e61aa8f | 698 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 699 | memcpy(f->eth_addr, mac, ETH_ALEN); |
700 | ||
17b46365 HY |
701 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
702 | if (rc < 0) { | |
703 | kfree(f); | |
704 | return rc; | |
705 | } | |
3e61aa8f | 706 | |
d342894c | 707 | ++vxlan->addrcnt; |
708 | hlist_add_head_rcu(&f->hlist, | |
3ad7a4b1 | 709 | vxlan_fdb_head(vxlan, mac, src_vni)); |
d342894c | 710 | } |
711 | ||
9e4b93f9 ND |
712 | if (notify) { |
713 | if (rd == NULL) | |
714 | rd = first_remote_rtnl(f); | |
715 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
716 | } | |
d342894c | 717 | |
718 | return 0; | |
719 | } | |
720 | ||
6706c82e | 721 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
722 | { |
723 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 724 | struct vxlan_rdst *rd, *nd; |
6681712d | 725 | |
0c1d70af PA |
726 | list_for_each_entry_safe(rd, nd, &f->remotes, list) { |
727 | dst_cache_destroy(&rd->dst_cache); | |
6681712d | 728 | kfree(rd); |
0c1d70af | 729 | } |
6681712d DS |
730 | kfree(f); |
731 | } | |
732 | ||
d342894c | 733 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
734 | { | |
735 | netdev_dbg(vxlan->dev, | |
736 | "delete %pM\n", f->eth_addr); | |
737 | ||
738 | --vxlan->addrcnt; | |
9e4b93f9 | 739 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 740 | |
741 | hlist_del_rcu(&f->hlist); | |
6681712d | 742 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 743 | } |
744 | ||
35cf2845 LR |
745 | static void vxlan_dst_free(struct rcu_head *head) |
746 | { | |
747 | struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); | |
748 | ||
749 | dst_cache_destroy(&rd->dst_cache); | |
750 | kfree(rd); | |
751 | } | |
752 | ||
753 | static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f, | |
754 | struct vxlan_rdst *rd) | |
755 | { | |
756 | list_del_rcu(&rd->list); | |
757 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); | |
758 | call_rcu(&rd->rcu, vxlan_dst_free); | |
759 | } | |
760 | ||
f0b074be | 761 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
3ad7a4b1 RP |
762 | union vxlan_addr *ip, __be16 *port, __be32 *src_vni, |
763 | __be32 *vni, u32 *ifindex) | |
d342894c | 764 | { |
6681712d | 765 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 766 | int err; |
d342894c | 767 | |
f0b074be | 768 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
769 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
770 | if (err) | |
771 | return err; | |
f0b074be | 772 | } else { |
e4c7ed41 CW |
773 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
774 | if (remote->sa.sa_family == AF_INET) { | |
775 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
776 | ip->sa.sa_family = AF_INET; | |
777 | #if IS_ENABLED(CONFIG_IPV6) | |
778 | } else { | |
779 | ip->sin6.sin6_addr = in6addr_any; | |
780 | ip->sa.sa_family = AF_INET6; | |
781 | #endif | |
782 | } | |
f0b074be | 783 | } |
d342894c | 784 | |
6681712d | 785 | if (tb[NDA_PORT]) { |
73cf3317 | 786 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 787 | return -EINVAL; |
f0b074be MR |
788 | *port = nla_get_be16(tb[NDA_PORT]); |
789 | } else { | |
0dfbdf41 | 790 | *port = vxlan->cfg.dst_port; |
f0b074be | 791 | } |
6681712d DS |
792 | |
793 | if (tb[NDA_VNI]) { | |
794 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
795 | return -EINVAL; | |
54bfd872 | 796 | *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); |
f0b074be MR |
797 | } else { |
798 | *vni = vxlan->default_dst.remote_vni; | |
799 | } | |
6681712d | 800 | |
3ad7a4b1 RP |
801 | if (tb[NDA_SRC_VNI]) { |
802 | if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32)) | |
803 | return -EINVAL; | |
804 | *src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI])); | |
805 | } else { | |
806 | *src_vni = vxlan->default_dst.remote_vni; | |
807 | } | |
808 | ||
6681712d | 809 | if (tb[NDA_IFINDEX]) { |
5abb0029 | 810 | struct net_device *tdev; |
6681712d DS |
811 | |
812 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
813 | return -EINVAL; | |
f0b074be | 814 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 815 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 816 | if (!tdev) |
6681712d | 817 | return -EADDRNOTAVAIL; |
f0b074be MR |
818 | } else { |
819 | *ifindex = 0; | |
820 | } | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | /* Add static entry (via netlink) */ | |
826 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
827 | struct net_device *dev, | |
f6f6424b | 828 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
829 | { |
830 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
831 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 832 | union vxlan_addr ip; |
f0b074be | 833 | __be16 port; |
3ad7a4b1 | 834 | __be32 src_vni, vni; |
54bfd872 | 835 | u32 ifindex; |
f0b074be MR |
836 | int err; |
837 | ||
838 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
839 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
840 | ndm->ndm_state); | |
841 | return -EINVAL; | |
842 | } | |
843 | ||
844 | if (tb[NDA_DST] == NULL) | |
845 | return -EINVAL; | |
846 | ||
3ad7a4b1 | 847 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex); |
f0b074be MR |
848 | if (err) |
849 | return err; | |
6681712d | 850 | |
5933a7bb MR |
851 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
852 | return -EAFNOSUPPORT; | |
853 | ||
d342894c | 854 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 855 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
3ad7a4b1 | 856 | port, src_vni, vni, ifindex, ndm->ndm_flags); |
d342894c | 857 | spin_unlock_bh(&vxlan->hash_lock); |
858 | ||
859 | return err; | |
860 | } | |
861 | ||
3ad7a4b1 RP |
862 | static int __vxlan_fdb_delete(struct vxlan_dev *vxlan, |
863 | const unsigned char *addr, union vxlan_addr ip, | |
864 | __be16 port, __be32 src_vni, u32 vni, u32 ifindex, | |
865 | u16 vid) | |
d342894c | 866 | { |
d342894c | 867 | struct vxlan_fdb *f; |
bc7892ba | 868 | struct vxlan_rdst *rd = NULL; |
3ad7a4b1 | 869 | int err = -ENOENT; |
bc7892ba | 870 | |
3ad7a4b1 | 871 | f = vxlan_find_mac(vxlan, addr, src_vni); |
bc7892ba | 872 | if (!f) |
3ad7a4b1 | 873 | return err; |
bc7892ba | 874 | |
e4c7ed41 CW |
875 | if (!vxlan_addr_any(&ip)) { |
876 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
877 | if (!rd) |
878 | goto out; | |
879 | } | |
880 | ||
bc7892ba MR |
881 | /* remove a destination if it's not the only one on the list, |
882 | * otherwise destroy the fdb entry | |
883 | */ | |
884 | if (rd && !list_is_singular(&f->remotes)) { | |
35cf2845 | 885 | vxlan_fdb_dst_destroy(vxlan, f, rd); |
bc7892ba | 886 | goto out; |
d342894c | 887 | } |
bc7892ba MR |
888 | |
889 | vxlan_fdb_destroy(vxlan, f); | |
890 | ||
891 | out: | |
3ad7a4b1 RP |
892 | return 0; |
893 | } | |
894 | ||
895 | /* Delete entry (via netlink) */ | |
896 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], | |
897 | struct net_device *dev, | |
898 | const unsigned char *addr, u16 vid) | |
899 | { | |
900 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
901 | union vxlan_addr ip; | |
902 | __be32 src_vni, vni; | |
903 | __be16 port; | |
904 | u32 ifindex; | |
905 | int err; | |
906 | ||
907 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex); | |
908 | if (err) | |
909 | return err; | |
910 | ||
911 | spin_lock_bh(&vxlan->hash_lock); | |
912 | err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex, | |
913 | vid); | |
d342894c | 914 | spin_unlock_bh(&vxlan->hash_lock); |
915 | ||
916 | return err; | |
917 | } | |
918 | ||
919 | /* Dump forwarding table */ | |
920 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 | 921 | struct net_device *dev, |
d297653d | 922 | struct net_device *filter_dev, int *idx) |
d342894c | 923 | { |
924 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
925 | unsigned int h; | |
d297653d | 926 | int err = 0; |
d342894c | 927 | |
928 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
929 | struct vxlan_fdb *f; | |
d342894c | 930 | |
b67bfe0d | 931 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 932 | struct vxlan_rdst *rd; |
6681712d | 933 | |
3e61aa8f | 934 | list_for_each_entry_rcu(rd, &f->remotes, list) { |
d297653d | 935 | if (*idx < cb->args[2]) |
07a51cd3 AW |
936 | goto skip; |
937 | ||
6681712d DS |
938 | err = vxlan_fdb_info(skb, vxlan, f, |
939 | NETLINK_CB(cb->skb).portid, | |
940 | cb->nlh->nlmsg_seq, | |
941 | RTM_NEWNEIGH, | |
942 | NLM_F_MULTI, rd); | |
d297653d | 943 | if (err < 0) |
3e61aa8f | 944 | goto out; |
3e61aa8f | 945 | skip: |
d297653d | 946 | *idx += 1; |
07a51cd3 | 947 | } |
d342894c | 948 | } |
949 | } | |
3e61aa8f | 950 | out: |
d297653d | 951 | return err; |
d342894c | 952 | } |
953 | ||
954 | /* Watch incoming packets to learn mapping between Ethernet address | |
955 | * and Tunnel endpoint. | |
c4b49512 | 956 | * Return true if packet is bogus and should be dropped. |
d342894c | 957 | */ |
26a41ae6 | 958 | static bool vxlan_snoop(struct net_device *dev, |
3ad7a4b1 RP |
959 | union vxlan_addr *src_ip, const u8 *src_mac, |
960 | __be32 vni) | |
d342894c | 961 | { |
962 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
963 | struct vxlan_fdb *f; | |
d342894c | 964 | |
3ad7a4b1 | 965 | f = vxlan_find_mac(vxlan, src_mac, vni); |
d342894c | 966 | if (likely(f)) { |
5ca5461c | 967 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 968 | |
e4c7ed41 | 969 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 970 | return false; |
971 | ||
972 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 973 | if (f->state & NUD_NOARP) |
26a41ae6 | 974 | return true; |
d342894c | 975 | |
976 | if (net_ratelimit()) | |
977 | netdev_info(dev, | |
e4c7ed41 | 978 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 979 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 980 | |
e4c7ed41 | 981 | rdst->remote_ip = *src_ip; |
d342894c | 982 | f->updated = jiffies; |
9e4b93f9 | 983 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 984 | } else { |
985 | /* learned new entry */ | |
986 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 987 | |
988 | /* close off race between vxlan_flush and incoming packets */ | |
989 | if (netif_running(dev)) | |
990 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
991 | NUD_REACHABLE, | |
992 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 993 | vxlan->cfg.dst_port, |
3ad7a4b1 | 994 | vni, |
3bf74b1a | 995 | vxlan->default_dst.remote_vni, |
996 | 0, NTF_SELF); | |
d342894c | 997 | spin_unlock(&vxlan->hash_lock); |
998 | } | |
26a41ae6 | 999 | |
1000 | return false; | |
d342894c | 1001 | } |
1002 | ||
d342894c | 1003 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1004 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1005 | { |
553675fb | 1006 | struct vxlan_dev *vxlan; |
c6fcc4fc | 1007 | struct vxlan_sock *sock4; |
4053ab1b AB |
1008 | #if IS_ENABLED(CONFIG_IPV6) |
1009 | struct vxlan_sock *sock6; | |
1010 | #endif | |
b1be00a6 | 1011 | unsigned short family = dev->default_dst.remote_ip.sa.sa_family; |
d342894c | 1012 | |
c6fcc4fc | 1013 | sock4 = rtnl_dereference(dev->vn4_sock); |
1014 | ||
95ab0991 G |
1015 | /* The vxlan_sock is only used by dev, leaving group has |
1016 | * no effect on other vxlan devices. | |
1017 | */ | |
c6fcc4fc | 1018 | if (family == AF_INET && sock4 && atomic_read(&sock4->refcnt) == 1) |
95ab0991 | 1019 | return false; |
b1be00a6 | 1020 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1021 | sock6 = rtnl_dereference(dev->vn6_sock); |
1022 | if (family == AF_INET6 && sock6 && atomic_read(&sock6->refcnt) == 1) | |
b1be00a6 JB |
1023 | return false; |
1024 | #endif | |
95ab0991 | 1025 | |
553675fb | 1026 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1027 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1028 | continue; |
d342894c | 1029 | |
c6fcc4fc | 1030 | if (family == AF_INET && |
1031 | rtnl_dereference(vxlan->vn4_sock) != sock4) | |
95ab0991 | 1032 | continue; |
b1be00a6 | 1033 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1034 | if (family == AF_INET6 && |
1035 | rtnl_dereference(vxlan->vn6_sock) != sock6) | |
b1be00a6 JB |
1036 | continue; |
1037 | #endif | |
95ab0991 G |
1038 | |
1039 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1040 | &dev->default_dst.remote_ip)) | |
1041 | continue; | |
1042 | ||
1043 | if (vxlan->default_dst.remote_ifindex != | |
1044 | dev->default_dst.remote_ifindex) | |
1045 | continue; | |
1046 | ||
1047 | return true; | |
553675fb | 1048 | } |
d342894c | 1049 | |
1050 | return false; | |
1051 | } | |
1052 | ||
544a773a | 1053 | static bool __vxlan_sock_release_prep(struct vxlan_sock *vs) |
7c47cedf | 1054 | { |
b1be00a6 | 1055 | struct vxlan_net *vn; |
012a5729 | 1056 | |
b1be00a6 | 1057 | if (!vs) |
544a773a | 1058 | return false; |
7c47cedf | 1059 | if (!atomic_dec_and_test(&vs->refcnt)) |
544a773a | 1060 | return false; |
d342894c | 1061 | |
b1be00a6 | 1062 | vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
1c51a915 | 1063 | spin_lock(&vn->sock_lock); |
7c47cedf | 1064 | hlist_del_rcu(&vs->hlist); |
e7b3db5e | 1065 | udp_tunnel_notify_del_rx_port(vs->sock, |
b9adcd69 AD |
1066 | (vs->flags & VXLAN_F_GPE) ? |
1067 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 1068 | UDP_TUNNEL_TYPE_VXLAN); |
1c51a915 SH |
1069 | spin_unlock(&vn->sock_lock); |
1070 | ||
544a773a | 1071 | return true; |
d342894c | 1072 | } |
1073 | ||
b1be00a6 JB |
1074 | static void vxlan_sock_release(struct vxlan_dev *vxlan) |
1075 | { | |
c6fcc4fc | 1076 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
b1be00a6 | 1077 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1078 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1079 | ||
57d88182 | 1080 | RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
544a773a HFS |
1081 | #endif |
1082 | ||
57d88182 | 1083 | RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
544a773a HFS |
1084 | synchronize_net(); |
1085 | ||
a53cb29b MB |
1086 | vxlan_vs_del_dev(vxlan); |
1087 | ||
c6fcc4fc | 1088 | if (__vxlan_sock_release_prep(sock4)) { |
1089 | udp_tunnel_sock_release(sock4->sock); | |
1090 | kfree(sock4); | |
544a773a HFS |
1091 | } |
1092 | ||
1093 | #if IS_ENABLED(CONFIG_IPV6) | |
c6fcc4fc | 1094 | if (__vxlan_sock_release_prep(sock6)) { |
1095 | udp_tunnel_sock_release(sock6->sock); | |
1096 | kfree(sock6); | |
544a773a | 1097 | } |
b1be00a6 JB |
1098 | #endif |
1099 | } | |
1100 | ||
56ef9c90 | 1101 | /* Update multicast group membership when first VNI on |
c4b49512 | 1102 | * multicast address is brought up |
7c47cedf | 1103 | */ |
56ef9c90 | 1104 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1105 | { |
b1be00a6 | 1106 | struct sock *sk; |
e4c7ed41 CW |
1107 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1108 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1109 | int ret = -EINVAL; |
d342894c | 1110 | |
e4c7ed41 | 1111 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1112 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1113 | struct ip_mreqn mreq = { |
1114 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1115 | .imr_ifindex = ifindex, | |
1116 | }; | |
1117 | ||
c6fcc4fc | 1118 | sk = sock4->sock->sk; |
b1be00a6 | 1119 | lock_sock(sk); |
56ef9c90 | 1120 | ret = ip_mc_join_group(sk, &mreq); |
b1be00a6 | 1121 | release_sock(sk); |
e4c7ed41 CW |
1122 | #if IS_ENABLED(CONFIG_IPV6) |
1123 | } else { | |
c6fcc4fc | 1124 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1125 | ||
1126 | sk = sock6->sock->sk; | |
b1be00a6 | 1127 | lock_sock(sk); |
56ef9c90 MRL |
1128 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1129 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1130 | release_sock(sk); |
e4c7ed41 CW |
1131 | #endif |
1132 | } | |
3fc2de2f | 1133 | |
56ef9c90 | 1134 | return ret; |
3fc2de2f | 1135 | } |
1136 | ||
1137 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1138 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1139 | { |
b1be00a6 | 1140 | struct sock *sk; |
e4c7ed41 CW |
1141 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1142 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1143 | int ret = -EINVAL; |
3fc2de2f | 1144 | |
e4c7ed41 | 1145 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1146 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1147 | struct ip_mreqn mreq = { |
1148 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1149 | .imr_ifindex = ifindex, | |
1150 | }; | |
1151 | ||
c6fcc4fc | 1152 | sk = sock4->sock->sk; |
b1be00a6 | 1153 | lock_sock(sk); |
56ef9c90 | 1154 | ret = ip_mc_leave_group(sk, &mreq); |
b1be00a6 | 1155 | release_sock(sk); |
e4c7ed41 CW |
1156 | #if IS_ENABLED(CONFIG_IPV6) |
1157 | } else { | |
c6fcc4fc | 1158 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1159 | ||
1160 | sk = sock6->sock->sk; | |
b1be00a6 | 1161 | lock_sock(sk); |
56ef9c90 MRL |
1162 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1163 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1164 | release_sock(sk); |
e4c7ed41 CW |
1165 | #endif |
1166 | } | |
d342894c | 1167 | |
56ef9c90 | 1168 | return ret; |
d342894c | 1169 | } |
1170 | ||
f14ecebb JB |
1171 | static bool vxlan_remcsum(struct vxlanhdr *unparsed, |
1172 | struct sk_buff *skb, u32 vxflags) | |
dfd8645e | 1173 | { |
7d34fa75 | 1174 | size_t start, offset; |
dfd8645e | 1175 | |
f14ecebb JB |
1176 | if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload) |
1177 | goto out; | |
b7fe10e5 | 1178 | |
f14ecebb JB |
1179 | start = vxlan_rco_start(unparsed->vx_vni); |
1180 | offset = start + vxlan_rco_offset(unparsed->vx_vni); | |
dfd8645e | 1181 | |
7d34fa75 | 1182 | if (!pskb_may_pull(skb, offset + sizeof(u16))) |
be5cfeab | 1183 | return false; |
dfd8645e | 1184 | |
be5cfeab JB |
1185 | skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset, |
1186 | !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
f14ecebb JB |
1187 | out: |
1188 | unparsed->vx_flags &= ~VXLAN_HF_RCO; | |
1189 | unparsed->vx_vni &= VXLAN_VNI_MASK; | |
be5cfeab | 1190 | return true; |
dfd8645e TH |
1191 | } |
1192 | ||
f14ecebb | 1193 | static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed, |
64f87d36 | 1194 | struct sk_buff *skb, u32 vxflags, |
10a5af23 | 1195 | struct vxlan_metadata *md) |
3288af08 | 1196 | { |
f14ecebb | 1197 | struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed; |
10a5af23 | 1198 | struct metadata_dst *tun_dst; |
f14ecebb JB |
1199 | |
1200 | if (!(unparsed->vx_flags & VXLAN_HF_GBP)) | |
1201 | goto out; | |
3288af08 | 1202 | |
3288af08 JB |
1203 | md->gbp = ntohs(gbp->policy_id); |
1204 | ||
10a5af23 | 1205 | tun_dst = (struct metadata_dst *)skb_dst(skb); |
810813c4 | 1206 | if (tun_dst) { |
3288af08 | 1207 | tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
810813c4 DM |
1208 | tun_dst->u.tun_info.options_len = sizeof(*md); |
1209 | } | |
3288af08 JB |
1210 | if (gbp->dont_learn) |
1211 | md->gbp |= VXLAN_GBP_DONT_LEARN; | |
1212 | ||
1213 | if (gbp->policy_applied) | |
1214 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; | |
f14ecebb | 1215 | |
64f87d36 JB |
1216 | /* In flow-based mode, GBP is carried in dst_metadata */ |
1217 | if (!(vxflags & VXLAN_F_COLLECT_METADATA)) | |
1218 | skb->mark = md->gbp; | |
f14ecebb JB |
1219 | out: |
1220 | unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS; | |
3288af08 JB |
1221 | } |
1222 | ||
e1e5314d | 1223 | static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed, |
61618eea | 1224 | __be16 *protocol, |
e1e5314d JB |
1225 | struct sk_buff *skb, u32 vxflags) |
1226 | { | |
1227 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed; | |
1228 | ||
1229 | /* Need to have Next Protocol set for interfaces in GPE mode. */ | |
1230 | if (!gpe->np_applied) | |
1231 | return false; | |
1232 | /* "The initial version is 0. If a receiver does not support the | |
1233 | * version indicated it MUST drop the packet. | |
1234 | */ | |
1235 | if (gpe->version != 0) | |
1236 | return false; | |
1237 | /* "When the O bit is set to 1, the packet is an OAM packet and OAM | |
1238 | * processing MUST occur." However, we don't implement OAM | |
1239 | * processing, thus drop the packet. | |
1240 | */ | |
1241 | if (gpe->oam_flag) | |
1242 | return false; | |
1243 | ||
1244 | switch (gpe->next_protocol) { | |
1245 | case VXLAN_GPE_NP_IPV4: | |
1246 | *protocol = htons(ETH_P_IP); | |
1247 | break; | |
1248 | case VXLAN_GPE_NP_IPV6: | |
1249 | *protocol = htons(ETH_P_IPV6); | |
1250 | break; | |
1251 | case VXLAN_GPE_NP_ETHERNET: | |
1252 | *protocol = htons(ETH_P_TEB); | |
1253 | break; | |
1254 | default: | |
1255 | return false; | |
1256 | } | |
1257 | ||
1258 | unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS; | |
1259 | return true; | |
1260 | } | |
1261 | ||
1ab016e2 JB |
1262 | static bool vxlan_set_mac(struct vxlan_dev *vxlan, |
1263 | struct vxlan_sock *vs, | |
3ad7a4b1 | 1264 | struct sk_buff *skb, __be32 vni) |
614732ea | 1265 | { |
614732ea | 1266 | union vxlan_addr saddr; |
614732ea | 1267 | |
614732ea | 1268 | skb_reset_mac_header(skb); |
614732ea TG |
1269 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
1270 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1271 | ||
1272 | /* Ignore packet loops (and multicast echo) */ | |
1273 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1ab016e2 | 1274 | return false; |
614732ea | 1275 | |
760c6805 | 1276 | /* Get address from the outer IP header */ |
ce212d0f | 1277 | if (vxlan_get_sk_family(vs) == AF_INET) { |
1ab016e2 | 1278 | saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; |
614732ea TG |
1279 | saddr.sa.sa_family = AF_INET; |
1280 | #if IS_ENABLED(CONFIG_IPV6) | |
1281 | } else { | |
1ab016e2 | 1282 | saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr; |
614732ea TG |
1283 | saddr.sa.sa_family = AF_INET6; |
1284 | #endif | |
1285 | } | |
1286 | ||
1ab016e2 | 1287 | if ((vxlan->flags & VXLAN_F_LEARN) && |
3ad7a4b1 | 1288 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, vni)) |
1ab016e2 JB |
1289 | return false; |
1290 | ||
1291 | return true; | |
1292 | } | |
1293 | ||
760c6805 JB |
1294 | static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph, |
1295 | struct sk_buff *skb) | |
1296 | { | |
1297 | int err = 0; | |
1298 | ||
1299 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1300 | err = IP_ECN_decapsulate(oiph, skb); | |
1301 | #if IS_ENABLED(CONFIG_IPV6) | |
1302 | else | |
1303 | err = IP6_ECN_decapsulate(oiph, skb); | |
1304 | #endif | |
1305 | ||
1306 | if (unlikely(err) && log_ecn_error) { | |
1307 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1308 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1309 | &((struct iphdr *)oiph)->saddr, | |
1310 | ((struct iphdr *)oiph)->tos); | |
1311 | else | |
1312 | net_info_ratelimited("non-ECT from %pI6\n", | |
1313 | &((struct ipv6hdr *)oiph)->saddr); | |
1314 | } | |
1315 | return err <= 1; | |
1316 | } | |
1317 | ||
d342894c | 1318 | /* Callback from net/ipv4/udp.c to receive packets */ |
f2d1968e | 1319 | static int vxlan_rcv(struct sock *sk, struct sk_buff *skb) |
d342894c | 1320 | { |
f2d1968e | 1321 | struct pcpu_sw_netstats *stats; |
c9e78efb | 1322 | struct vxlan_dev *vxlan; |
5cfccc5a | 1323 | struct vxlan_sock *vs; |
f14ecebb | 1324 | struct vxlanhdr unparsed; |
ee122c79 TG |
1325 | struct vxlan_metadata _md; |
1326 | struct vxlan_metadata *md = &_md; | |
61618eea | 1327 | __be16 protocol = htons(ETH_P_TEB); |
e1e5314d | 1328 | bool raw_proto = false; |
f2d1968e | 1329 | void *oiph; |
3ad7a4b1 | 1330 | __be32 vni = 0; |
d342894c | 1331 | |
e1e5314d | 1332 | /* Need UDP and VXLAN header to be present */ |
7ce04758 | 1333 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
e5aed006 | 1334 | goto drop; |
d342894c | 1335 | |
f14ecebb | 1336 | unparsed = *vxlan_hdr(skb); |
288b01c8 JB |
1337 | /* VNI flag always required to be set */ |
1338 | if (!(unparsed.vx_flags & VXLAN_HF_VNI)) { | |
1339 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1340 | ntohl(vxlan_hdr(skb)->vx_flags), | |
1341 | ntohl(vxlan_hdr(skb)->vx_vni)); | |
1342 | /* Return non vxlan pkt */ | |
e5aed006 | 1343 | goto drop; |
d342894c | 1344 | } |
288b01c8 JB |
1345 | unparsed.vx_flags &= ~VXLAN_HF_VNI; |
1346 | unparsed.vx_vni &= ~VXLAN_VNI_MASK; | |
d342894c | 1347 | |
559835ea | 1348 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1349 | if (!vs) |
d342894c | 1350 | goto drop; |
d342894c | 1351 | |
3ad7a4b1 RP |
1352 | vni = vxlan_vni(vxlan_hdr(skb)->vx_vni); |
1353 | ||
3ad7a4b1 | 1354 | vxlan = vxlan_vs_find_vni(vs, vni); |
c9e78efb JB |
1355 | if (!vxlan) |
1356 | goto drop; | |
1357 | ||
e1e5314d JB |
1358 | /* For backwards compatibility, only allow reserved fields to be |
1359 | * used by VXLAN extensions if explicitly requested. | |
1360 | */ | |
1361 | if (vs->flags & VXLAN_F_GPE) { | |
1362 | if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags)) | |
1363 | goto drop; | |
1364 | raw_proto = true; | |
1365 | } | |
1366 | ||
1367 | if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto, | |
1368 | !net_eq(vxlan->net, dev_net(vxlan->dev)))) | |
1369 | goto drop; | |
c9e78efb | 1370 | |
ee122c79 | 1371 | if (vxlan_collect_metadata(vs)) { |
10a5af23 | 1372 | struct metadata_dst *tun_dst; |
07dabf20 | 1373 | |
c29a70d2 | 1374 | tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
d817f432 | 1375 | key32_to_tunnel_id(vni), sizeof(*md)); |
c29a70d2 | 1376 | |
ee122c79 TG |
1377 | if (!tun_dst) |
1378 | goto drop; | |
1379 | ||
0f1b7354 | 1380 | md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
10a5af23 JB |
1381 | |
1382 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
ee122c79 TG |
1383 | } else { |
1384 | memset(md, 0, sizeof(*md)); | |
1385 | } | |
1386 | ||
f14ecebb JB |
1387 | if (vs->flags & VXLAN_F_REMCSUM_RX) |
1388 | if (!vxlan_remcsum(&unparsed, skb, vs->flags)) | |
1389 | goto drop; | |
1390 | if (vs->flags & VXLAN_F_GBP) | |
10a5af23 | 1391 | vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md); |
e1e5314d JB |
1392 | /* Note that GBP and GPE can never be active together. This is |
1393 | * ensured in vxlan_dev_configure. | |
1394 | */ | |
3511494c | 1395 | |
f14ecebb | 1396 | if (unparsed.vx_flags || unparsed.vx_vni) { |
3bf39475 TH |
1397 | /* If there are any unprocessed flags remaining treat |
1398 | * this as a malformed packet. This behavior diverges from | |
1399 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1400 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1401 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1402 | * is more robust and provides a little more security in |
1403 | * adding extensions to VXLAN. | |
1404 | */ | |
288b01c8 | 1405 | goto drop; |
3bf39475 TH |
1406 | } |
1407 | ||
e1e5314d | 1408 | if (!raw_proto) { |
3ad7a4b1 | 1409 | if (!vxlan_set_mac(vxlan, vs, skb, vni)) |
e1e5314d JB |
1410 | goto drop; |
1411 | } else { | |
8be0cfa4 | 1412 | skb_reset_mac_header(skb); |
e1e5314d JB |
1413 | skb->dev = vxlan->dev; |
1414 | skb->pkt_type = PACKET_HOST; | |
1415 | } | |
f2d1968e | 1416 | |
f2d1968e JB |
1417 | oiph = skb_network_header(skb); |
1418 | skb_reset_network_header(skb); | |
1419 | ||
1420 | if (!vxlan_ecn_decapsulate(vs, oiph, skb)) { | |
1421 | ++vxlan->dev->stats.rx_frame_errors; | |
1422 | ++vxlan->dev->stats.rx_errors; | |
1423 | goto drop; | |
1424 | } | |
1425 | ||
1426 | stats = this_cpu_ptr(vxlan->dev->tstats); | |
1427 | u64_stats_update_begin(&stats->syncp); | |
1428 | stats->rx_packets++; | |
1429 | stats->rx_bytes += skb->len; | |
1430 | u64_stats_update_end(&stats->syncp); | |
1431 | ||
1432 | gro_cells_receive(&vxlan->gro_cells, skb); | |
5cfccc5a PS |
1433 | return 0; |
1434 | ||
1435 | drop: | |
288b01c8 JB |
1436 | /* Consume bad packet */ |
1437 | kfree_skb(skb); | |
1438 | return 0; | |
5cfccc5a PS |
1439 | } |
1440 | ||
3ad7a4b1 | 1441 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
e4f67add DS |
1442 | { |
1443 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1444 | struct arphdr *parp; | |
1445 | u8 *arpptr, *sha; | |
1446 | __be32 sip, tip; | |
1447 | struct neighbour *n; | |
1448 | ||
1449 | if (dev->flags & IFF_NOARP) | |
1450 | goto out; | |
1451 | ||
1452 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1453 | dev->stats.tx_dropped++; | |
1454 | goto out; | |
1455 | } | |
1456 | parp = arp_hdr(skb); | |
1457 | ||
1458 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1459 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1460 | parp->ar_pro != htons(ETH_P_IP) || | |
1461 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1462 | parp->ar_hln != dev->addr_len || | |
1463 | parp->ar_pln != 4) | |
1464 | goto out; | |
1465 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1466 | sha = arpptr; | |
1467 | arpptr += dev->addr_len; /* sha */ | |
1468 | memcpy(&sip, arpptr, sizeof(sip)); | |
1469 | arpptr += sizeof(sip); | |
1470 | arpptr += dev->addr_len; /* tha */ | |
1471 | memcpy(&tip, arpptr, sizeof(tip)); | |
1472 | ||
1473 | if (ipv4_is_loopback(tip) || | |
1474 | ipv4_is_multicast(tip)) | |
1475 | goto out; | |
1476 | ||
1477 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1478 | ||
1479 | if (n) { | |
e4f67add DS |
1480 | struct vxlan_fdb *f; |
1481 | struct sk_buff *reply; | |
1482 | ||
1483 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1484 | neigh_release(n); | |
1485 | goto out; | |
1486 | } | |
1487 | ||
3ad7a4b1 | 1488 | f = vxlan_find_mac(vxlan, n->ha, vni); |
e4c7ed41 | 1489 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1490 | /* bridge-local neighbor */ |
1491 | neigh_release(n); | |
1492 | goto out; | |
1493 | } | |
1494 | ||
1495 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1496 | n->ha, sha); | |
1497 | ||
1498 | neigh_release(n); | |
1499 | ||
7346135d DS |
1500 | if (reply == NULL) |
1501 | goto out; | |
1502 | ||
e4f67add DS |
1503 | skb_reset_mac_header(reply); |
1504 | __skb_pull(reply, skb_network_offset(reply)); | |
1505 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1506 | reply->pkt_type = PACKET_HOST; | |
1507 | ||
1508 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1509 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1510 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1511 | union vxlan_addr ipa = { | |
1512 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1513 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1514 | }; |
1515 | ||
1516 | vxlan_ip_miss(dev, &ipa); | |
1517 | } | |
e4f67add DS |
1518 | out: |
1519 | consume_skb(skb); | |
1520 | return NETDEV_TX_OK; | |
1521 | } | |
1522 | ||
f564f45c | 1523 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1524 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1525 | struct neighbour *n, bool isrouter) | |
1526 | { | |
1527 | struct net_device *dev = request->dev; | |
1528 | struct sk_buff *reply; | |
1529 | struct nd_msg *ns, *na; | |
1530 | struct ipv6hdr *pip6; | |
1531 | u8 *daddr; | |
1532 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1533 | int ns_olen; | |
1534 | int i, len; | |
1535 | ||
f1fb08f6 | 1536 | if (dev == NULL || !pskb_may_pull(request, request->len)) |
4b29dba9 DS |
1537 | return NULL; |
1538 | ||
1539 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1540 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1541 | reply = alloc_skb(len, GFP_ATOMIC); | |
1542 | if (reply == NULL) | |
1543 | return NULL; | |
1544 | ||
1545 | reply->protocol = htons(ETH_P_IPV6); | |
1546 | reply->dev = dev; | |
1547 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1548 | skb_push(reply, sizeof(struct ethhdr)); | |
6297b91c | 1549 | skb_reset_mac_header(reply); |
4b29dba9 | 1550 | |
f1fb08f6 | 1551 | ns = (struct nd_msg *)(ipv6_hdr(request) + 1); |
4b29dba9 DS |
1552 | |
1553 | daddr = eth_hdr(request)->h_source; | |
f1fb08f6 VB |
1554 | ns_olen = request->len - skb_network_offset(request) - |
1555 | sizeof(struct ipv6hdr) - sizeof(*ns); | |
4b29dba9 DS |
1556 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { |
1557 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1558 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1559 | break; | |
1560 | } | |
1561 | } | |
1562 | ||
1563 | /* Ethernet header */ | |
1564 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1565 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1566 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1567 | reply->protocol = htons(ETH_P_IPV6); | |
1568 | ||
1569 | skb_pull(reply, sizeof(struct ethhdr)); | |
6297b91c | 1570 | skb_reset_network_header(reply); |
4b29dba9 DS |
1571 | skb_put(reply, sizeof(struct ipv6hdr)); |
1572 | ||
1573 | /* IPv6 header */ | |
1574 | ||
1575 | pip6 = ipv6_hdr(reply); | |
1576 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1577 | pip6->version = 6; | |
1578 | pip6->priority = ipv6_hdr(request)->priority; | |
1579 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1580 | pip6->hop_limit = 255; | |
1581 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1582 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1583 | ||
1584 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
6297b91c | 1585 | skb_reset_transport_header(reply); |
4b29dba9 DS |
1586 | |
1587 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1588 | ||
1589 | /* Neighbor Advertisement */ | |
1590 | memset(na, 0, sizeof(*na)+na_olen); | |
1591 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1592 | na->icmph.icmp6_router = isrouter; | |
1593 | na->icmph.icmp6_override = 1; | |
1594 | na->icmph.icmp6_solicited = 1; | |
1595 | na->target = ns->target; | |
1596 | ether_addr_copy(&na->opt[2], n->ha); | |
1597 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1598 | na->opt[1] = na_olen >> 3; | |
1599 | ||
1600 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1601 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1602 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1603 | ||
1604 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1605 | ||
1606 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1607 | ||
1608 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1609 | ||
1610 | return reply; | |
1611 | } | |
1612 | ||
3ad7a4b1 | 1613 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
f564f45c CW |
1614 | { |
1615 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1616 | struct nd_msg *msg; |
f564f45c | 1617 | const struct ipv6hdr *iphdr; |
8dcd81a9 | 1618 | const struct in6_addr *daddr; |
4b29dba9 DS |
1619 | struct neighbour *n; |
1620 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1621 | |
1622 | in6_dev = __in6_dev_get(dev); | |
1623 | if (!in6_dev) | |
1624 | goto out; | |
1625 | ||
f1fb08f6 VB |
1626 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + sizeof(struct nd_msg))) |
1627 | goto out; | |
1628 | ||
f564f45c | 1629 | iphdr = ipv6_hdr(skb); |
f564f45c CW |
1630 | daddr = &iphdr->daddr; |
1631 | ||
f1fb08f6 | 1632 | msg = (struct nd_msg *)(iphdr + 1); |
f564f45c CW |
1633 | if (msg->icmph.icmp6_code != 0 || |
1634 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1635 | goto out; | |
1636 | ||
4b29dba9 DS |
1637 | if (ipv6_addr_loopback(daddr) || |
1638 | ipv6_addr_is_multicast(&msg->target)) | |
1639 | goto out; | |
1640 | ||
1641 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1642 | |
1643 | if (n) { | |
1644 | struct vxlan_fdb *f; | |
4b29dba9 | 1645 | struct sk_buff *reply; |
f564f45c CW |
1646 | |
1647 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1648 | neigh_release(n); | |
1649 | goto out; | |
1650 | } | |
1651 | ||
3ad7a4b1 | 1652 | f = vxlan_find_mac(vxlan, n->ha, vni); |
f564f45c CW |
1653 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
1654 | /* bridge-local neighbor */ | |
1655 | neigh_release(n); | |
1656 | goto out; | |
1657 | } | |
1658 | ||
4b29dba9 DS |
1659 | reply = vxlan_na_create(skb, n, |
1660 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1661 | ||
f564f45c | 1662 | neigh_release(n); |
4b29dba9 DS |
1663 | |
1664 | if (reply == NULL) | |
1665 | goto out; | |
1666 | ||
1667 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1668 | dev->stats.rx_dropped++; | |
1669 | ||
f564f45c | 1670 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1671 | union vxlan_addr ipa = { |
1672 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1673 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1674 | }; |
1675 | ||
f564f45c CW |
1676 | vxlan_ip_miss(dev, &ipa); |
1677 | } | |
1678 | ||
1679 | out: | |
1680 | consume_skb(skb); | |
1681 | return NETDEV_TX_OK; | |
1682 | } | |
1683 | #endif | |
1684 | ||
e4f67add DS |
1685 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1686 | { | |
1687 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1688 | struct neighbour *n; | |
e4f67add DS |
1689 | |
1690 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1691 | return false; | |
1692 | ||
1693 | n = NULL; | |
1694 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1695 | case ETH_P_IP: | |
e15a00aa CW |
1696 | { |
1697 | struct iphdr *pip; | |
1698 | ||
e4f67add DS |
1699 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1700 | return false; | |
1701 | pip = ip_hdr(skb); | |
1702 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1703 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1704 | union vxlan_addr ipa = { | |
1705 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 1706 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1707 | }; |
1708 | ||
1709 | vxlan_ip_miss(dev, &ipa); | |
1710 | return false; | |
1711 | } | |
1712 | ||
e4f67add | 1713 | break; |
e15a00aa CW |
1714 | } |
1715 | #if IS_ENABLED(CONFIG_IPV6) | |
1716 | case ETH_P_IPV6: | |
1717 | { | |
1718 | struct ipv6hdr *pip6; | |
1719 | ||
1720 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1721 | return false; | |
1722 | pip6 = ipv6_hdr(skb); | |
1723 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1724 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1725 | union vxlan_addr ipa = { | |
1726 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 1727 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
1728 | }; |
1729 | ||
1730 | vxlan_ip_miss(dev, &ipa); | |
1731 | return false; | |
1732 | } | |
1733 | ||
1734 | break; | |
1735 | } | |
1736 | #endif | |
e4f67add DS |
1737 | default: |
1738 | return false; | |
1739 | } | |
1740 | ||
1741 | if (n) { | |
1742 | bool diff; | |
1743 | ||
7367d0b5 | 1744 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1745 | if (diff) { |
1746 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1747 | dev->addr_len); | |
1748 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1749 | } | |
1750 | neigh_release(n); | |
1751 | return diff; | |
e4c7ed41 CW |
1752 | } |
1753 | ||
e4f67add DS |
1754 | return false; |
1755 | } | |
1756 | ||
af33c1ad | 1757 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
1758 | struct vxlan_metadata *md) |
1759 | { | |
1760 | struct vxlanhdr_gbp *gbp; | |
1761 | ||
db79a621 TG |
1762 | if (!md->gbp) |
1763 | return; | |
1764 | ||
3511494c | 1765 | gbp = (struct vxlanhdr_gbp *)vxh; |
54bfd872 | 1766 | vxh->vx_flags |= VXLAN_HF_GBP; |
3511494c TG |
1767 | |
1768 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
1769 | gbp->dont_learn = 1; | |
1770 | ||
1771 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
1772 | gbp->policy_applied = 1; | |
1773 | ||
1774 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
1775 | } | |
1776 | ||
e1e5314d JB |
1777 | static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags, |
1778 | __be16 protocol) | |
1779 | { | |
1780 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh; | |
1781 | ||
1782 | gpe->np_applied = 1; | |
1783 | ||
1784 | switch (protocol) { | |
1785 | case htons(ETH_P_IP): | |
1786 | gpe->next_protocol = VXLAN_GPE_NP_IPV4; | |
1787 | return 0; | |
1788 | case htons(ETH_P_IPV6): | |
1789 | gpe->next_protocol = VXLAN_GPE_NP_IPV6; | |
1790 | return 0; | |
1791 | case htons(ETH_P_TEB): | |
1792 | gpe->next_protocol = VXLAN_GPE_NP_ETHERNET; | |
1793 | return 0; | |
1794 | } | |
1795 | return -EPFNOSUPPORT; | |
1796 | } | |
1797 | ||
f491e56d JB |
1798 | static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst, |
1799 | int iphdr_len, __be32 vni, | |
1800 | struct vxlan_metadata *md, u32 vxflags, | |
b4ed5cad | 1801 | bool udp_sum) |
e4c7ed41 | 1802 | { |
e4c7ed41 | 1803 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
1804 | int min_headroom; |
1805 | int err; | |
dfd8645e | 1806 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
e1e5314d | 1807 | __be16 inner_protocol = htons(ETH_P_TEB); |
dfd8645e | 1808 | |
af33c1ad | 1809 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1810 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1811 | int csum_start = skb_checksum_start_offset(skb); | |
1812 | ||
1813 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1814 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1815 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
b5708501 | 1816 | skb->csum_offset == offsetof(struct tcphdr, check))) |
dfd8645e | 1817 | type |= SKB_GSO_TUNNEL_REMCSUM; |
dfd8645e | 1818 | } |
e4c7ed41 | 1819 | |
e4c7ed41 | 1820 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
4a4f86cc | 1821 | + VXLAN_HLEN + iphdr_len; |
649c5b8b PS |
1822 | |
1823 | /* Need space for new headers (invalidates iph ptr) */ | |
1824 | err = skb_cow_head(skb, min_headroom); | |
e1e5314d | 1825 | if (unlikely(err)) |
c46b7897 | 1826 | return err; |
649c5b8b | 1827 | |
aed069df AD |
1828 | err = iptunnel_handle_offloads(skb, type); |
1829 | if (err) | |
c46b7897 | 1830 | return err; |
b736a623 | 1831 | |
49560532 | 1832 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
54bfd872 JB |
1833 | vxh->vx_flags = VXLAN_HF_VNI; |
1834 | vxh->vx_vni = vxlan_vni_field(vni); | |
49560532 | 1835 | |
dfd8645e | 1836 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
54bfd872 | 1837 | unsigned int start; |
dfd8645e | 1838 | |
54bfd872 JB |
1839 | start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr); |
1840 | vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset); | |
1841 | vxh->vx_flags |= VXLAN_HF_RCO; | |
dfd8645e TH |
1842 | |
1843 | if (!skb_is_gso(skb)) { | |
1844 | skb->ip_summed = CHECKSUM_NONE; | |
1845 | skb->encapsulation = 0; | |
1846 | } | |
1847 | } | |
1848 | ||
af33c1ad TH |
1849 | if (vxflags & VXLAN_F_GBP) |
1850 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
e1e5314d JB |
1851 | if (vxflags & VXLAN_F_GPE) { |
1852 | err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol); | |
1853 | if (err < 0) | |
c46b7897 | 1854 | return err; |
e1e5314d JB |
1855 | inner_protocol = skb->protocol; |
1856 | } | |
3511494c | 1857 | |
e1e5314d | 1858 | skb_set_inner_protocol(skb, inner_protocol); |
039f5062 | 1859 | return 0; |
49560532 | 1860 | } |
49560532 | 1861 | |
655c3de1 | 1862 | static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev, |
1863 | struct vxlan_sock *sock4, | |
1a8496ba | 1864 | struct sk_buff *skb, int oif, u8 tos, |
4ecb1d83 | 1865 | __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport, |
0c1d70af | 1866 | struct dst_cache *dst_cache, |
db3c6139 | 1867 | const struct ip_tunnel_info *info) |
1a8496ba | 1868 | { |
db3c6139 | 1869 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
1a8496ba JB |
1870 | struct rtable *rt = NULL; |
1871 | struct flowi4 fl4; | |
1872 | ||
655c3de1 | 1873 | if (!sock4) |
1874 | return ERR_PTR(-EIO); | |
1875 | ||
db3c6139 DB |
1876 | if (tos && !info) |
1877 | use_cache = false; | |
1878 | if (use_cache) { | |
0c1d70af PA |
1879 | rt = dst_cache_get_ip4(dst_cache, saddr); |
1880 | if (rt) | |
1881 | return rt; | |
1882 | } | |
1883 | ||
1a8496ba JB |
1884 | memset(&fl4, 0, sizeof(fl4)); |
1885 | fl4.flowi4_oif = oif; | |
1886 | fl4.flowi4_tos = RT_TOS(tos); | |
1887 | fl4.flowi4_mark = skb->mark; | |
1888 | fl4.flowi4_proto = IPPROTO_UDP; | |
1889 | fl4.daddr = daddr; | |
272d96a5 | 1890 | fl4.saddr = *saddr; |
4ecb1d83 MP |
1891 | fl4.fl4_dport = dport; |
1892 | fl4.fl4_sport = sport; | |
1a8496ba JB |
1893 | |
1894 | rt = ip_route_output_key(vxlan->net, &fl4); | |
655c3de1 | 1895 | if (likely(!IS_ERR(rt))) { |
1896 | if (rt->dst.dev == dev) { | |
1897 | netdev_dbg(dev, "circular route to %pI4\n", &daddr); | |
1898 | ip_rt_put(rt); | |
1899 | return ERR_PTR(-ELOOP); | |
1900 | } | |
1901 | ||
1a8496ba | 1902 | *saddr = fl4.saddr; |
0c1d70af PA |
1903 | if (use_cache) |
1904 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); | |
655c3de1 | 1905 | } else { |
1906 | netdev_dbg(dev, "no route to %pI4\n", &daddr); | |
1907 | return ERR_PTR(-ENETUNREACH); | |
0c1d70af | 1908 | } |
1a8496ba JB |
1909 | return rt; |
1910 | } | |
1911 | ||
e5d4b29f JB |
1912 | #if IS_ENABLED(CONFIG_IPV6) |
1913 | static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan, | |
655c3de1 | 1914 | struct net_device *dev, |
03dc52a8 | 1915 | struct vxlan_sock *sock6, |
1400615d | 1916 | struct sk_buff *skb, int oif, u8 tos, |
e7f70af1 | 1917 | __be32 label, |
e5d4b29f | 1918 | const struct in6_addr *daddr, |
0c1d70af | 1919 | struct in6_addr *saddr, |
4ecb1d83 | 1920 | __be16 dport, __be16 sport, |
db3c6139 DB |
1921 | struct dst_cache *dst_cache, |
1922 | const struct ip_tunnel_info *info) | |
e5d4b29f | 1923 | { |
db3c6139 | 1924 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e5d4b29f JB |
1925 | struct dst_entry *ndst; |
1926 | struct flowi6 fl6; | |
1927 | int err; | |
1928 | ||
c6fcc4fc | 1929 | if (!sock6) |
1930 | return ERR_PTR(-EIO); | |
1931 | ||
1400615d DB |
1932 | if (tos && !info) |
1933 | use_cache = false; | |
db3c6139 | 1934 | if (use_cache) { |
0c1d70af PA |
1935 | ndst = dst_cache_get_ip6(dst_cache, saddr); |
1936 | if (ndst) | |
1937 | return ndst; | |
1938 | } | |
1939 | ||
e5d4b29f JB |
1940 | memset(&fl6, 0, sizeof(fl6)); |
1941 | fl6.flowi6_oif = oif; | |
1942 | fl6.daddr = *daddr; | |
272d96a5 | 1943 | fl6.saddr = *saddr; |
eaa93bf4 | 1944 | fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label); |
e5d4b29f JB |
1945 | fl6.flowi6_mark = skb->mark; |
1946 | fl6.flowi6_proto = IPPROTO_UDP; | |
4ecb1d83 MP |
1947 | fl6.fl6_dport = dport; |
1948 | fl6.fl6_sport = sport; | |
e5d4b29f JB |
1949 | |
1950 | err = ipv6_stub->ipv6_dst_lookup(vxlan->net, | |
c6fcc4fc | 1951 | sock6->sock->sk, |
e5d4b29f | 1952 | &ndst, &fl6); |
655c3de1 | 1953 | if (unlikely(err < 0)) { |
1954 | netdev_dbg(dev, "no route to %pI6\n", daddr); | |
1955 | return ERR_PTR(-ENETUNREACH); | |
1956 | } | |
1957 | ||
1958 | if (unlikely(ndst->dev == dev)) { | |
1959 | netdev_dbg(dev, "circular route to %pI6\n", daddr); | |
1960 | dst_release(ndst); | |
1961 | return ERR_PTR(-ELOOP); | |
1962 | } | |
e5d4b29f JB |
1963 | |
1964 | *saddr = fl6.saddr; | |
db3c6139 | 1965 | if (use_cache) |
0c1d70af | 1966 | dst_cache_set_ip6(dst_cache, ndst, saddr); |
e5d4b29f JB |
1967 | return ndst; |
1968 | } | |
1969 | #endif | |
1970 | ||
9dcc71e1 SS |
1971 | /* Bypass encapsulation if the destination is local */ |
1972 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
3ad7a4b1 | 1973 | struct vxlan_dev *dst_vxlan, __be32 vni) |
9dcc71e1 | 1974 | { |
8f84985f | 1975 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1976 | union vxlan_addr loopback; |
1977 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
1978 | struct net_device *dev = skb->dev; |
1979 | int len = skb->len; | |
9dcc71e1 | 1980 | |
8f84985f LR |
1981 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1982 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1983 | skb->pkt_type = PACKET_HOST; |
1984 | skb->encapsulation = 0; | |
1985 | skb->dev = dst_vxlan->dev; | |
1986 | __skb_pull(skb, skb_network_offset(skb)); | |
1987 | ||
e4c7ed41 CW |
1988 | if (remote_ip->sa.sa_family == AF_INET) { |
1989 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1990 | loopback.sa.sa_family = AF_INET; | |
1991 | #if IS_ENABLED(CONFIG_IPV6) | |
1992 | } else { | |
1993 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1994 | loopback.sa.sa_family = AF_INET6; | |
1995 | #endif | |
1996 | } | |
1997 | ||
9dcc71e1 | 1998 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
3ad7a4b1 | 1999 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source, vni); |
9dcc71e1 SS |
2000 | |
2001 | u64_stats_update_begin(&tx_stats->syncp); | |
2002 | tx_stats->tx_packets++; | |
ce6502a8 | 2003 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
2004 | u64_stats_update_end(&tx_stats->syncp); |
2005 | ||
2006 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
2007 | u64_stats_update_begin(&rx_stats->syncp); | |
2008 | rx_stats->rx_packets++; | |
ce6502a8 | 2009 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
2010 | u64_stats_update_end(&rx_stats->syncp); |
2011 | } else { | |
ce6502a8 | 2012 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
2013 | } |
2014 | } | |
2015 | ||
fee1fad7 | 2016 | static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev, |
2017 | struct vxlan_dev *vxlan, union vxlan_addr *daddr, | |
1f6cc07e | 2018 | __be16 dst_port, __be32 vni, struct dst_entry *dst, |
fee1fad7 | 2019 | u32 rt_flags) |
2020 | { | |
2021 | #if IS_ENABLED(CONFIG_IPV6) | |
2022 | /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of | |
2023 | * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple | |
2024 | * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry. | |
2025 | */ | |
2026 | BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL); | |
2027 | #endif | |
2028 | /* Bypass encapsulation if the destination is local */ | |
2029 | if (rt_flags & RTCF_LOCAL && | |
2030 | !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
2031 | struct vxlan_dev *dst_vxlan; | |
2032 | ||
2033 | dst_release(dst); | |
2034 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, | |
2035 | daddr->sa.sa_family, dst_port, | |
2036 | vxlan->flags); | |
2037 | if (!dst_vxlan) { | |
2038 | dev->stats.tx_errors++; | |
2039 | kfree_skb(skb); | |
2040 | ||
2041 | return -ENOENT; | |
2042 | } | |
3ad7a4b1 | 2043 | vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni); |
fee1fad7 | 2044 | return 1; |
2045 | } | |
2046 | ||
2047 | return 0; | |
2048 | } | |
2049 | ||
4ad16930 | 2050 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
3ad7a4b1 RP |
2051 | __be32 default_vni, struct vxlan_rdst *rdst, |
2052 | bool did_rsc) | |
d342894c | 2053 | { |
d71785ff | 2054 | struct dst_cache *dst_cache; |
3093fbe7 | 2055 | struct ip_tunnel_info *info; |
d342894c | 2056 | struct vxlan_dev *vxlan = netdev_priv(dev); |
0770b53b | 2057 | const struct iphdr *old_iph = ip_hdr(skb); |
e4c7ed41 | 2058 | union vxlan_addr *dst; |
272d96a5 | 2059 | union vxlan_addr remote_ip, local_ip; |
ee122c79 TG |
2060 | struct vxlan_metadata _md; |
2061 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 2062 | __be16 src_port = 0, dst_port; |
655c3de1 | 2063 | struct dst_entry *ndst = NULL; |
e7f70af1 | 2064 | __be32 vni, label; |
d342894c | 2065 | __u8 tos, ttl; |
0e6fbc5b | 2066 | int err; |
ee122c79 | 2067 | u32 flags = vxlan->flags; |
b4ed5cad | 2068 | bool udp_sum = false; |
f491e56d | 2069 | bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev)); |
d342894c | 2070 | |
61adedf3 | 2071 | info = skb_tunnel_info(skb); |
3093fbe7 | 2072 | |
ee122c79 | 2073 | if (rdst) { |
0770b53b | 2074 | dst = &rdst->remote_ip; |
2075 | if (vxlan_addr_any(dst)) { | |
2076 | if (did_rsc) { | |
2077 | /* short-circuited back to local bridge */ | |
3ad7a4b1 | 2078 | vxlan_encap_bypass(skb, vxlan, vxlan, default_vni); |
0770b53b | 2079 | return; |
2080 | } | |
2081 | goto drop; | |
2082 | } | |
2083 | ||
0dfbdf41 | 2084 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
3ad7a4b1 | 2085 | vni = (rdst->remote_vni) ? : default_vni; |
1158632b | 2086 | local_ip = vxlan->cfg.saddr; |
d71785ff | 2087 | dst_cache = &rdst->dst_cache; |
0770b53b | 2088 | md->gbp = skb->mark; |
2089 | ttl = vxlan->cfg.ttl; | |
2090 | if (!ttl && vxlan_addr_multicast(dst)) | |
2091 | ttl = 1; | |
2092 | ||
2093 | tos = vxlan->cfg.tos; | |
2094 | if (tos == 1) | |
2095 | tos = ip_tunnel_get_dsfield(old_iph, skb); | |
2096 | ||
2097 | if (dst->sa.sa_family == AF_INET) | |
2098 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX); | |
2099 | else | |
2100 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); | |
2101 | label = vxlan->cfg.label; | |
ee122c79 TG |
2102 | } else { |
2103 | if (!info) { | |
2104 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
2105 | dev->name); | |
2106 | goto drop; | |
2107 | } | |
b1be00a6 | 2108 | remote_ip.sa.sa_family = ip_tunnel_info_af(info); |
272d96a5 | 2109 | if (remote_ip.sa.sa_family == AF_INET) { |
a725e514 | 2110 | remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; |
272d96a5 | 2111 | local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src; |
2112 | } else { | |
a725e514 | 2113 | remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; |
272d96a5 | 2114 | local_ip.sin6.sin6_addr = info->key.u.ipv6.src; |
2115 | } | |
ee122c79 | 2116 | dst = &remote_ip; |
0770b53b | 2117 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
2118 | vni = tunnel_id_to_key32(info->key.tun_id); | |
d71785ff | 2119 | dst_cache = &info->dst_cache; |
0770b53b | 2120 | if (info->options_len) |
2121 | md = ip_tunnel_info_opts(info); | |
a725e514 JB |
2122 | ttl = info->key.ttl; |
2123 | tos = info->key.tos; | |
e7f70af1 | 2124 | label = info->key.label; |
b4ed5cad | 2125 | udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
a725e514 | 2126 | } |
0770b53b | 2127 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
2128 | vxlan->cfg.port_max, true); | |
a725e514 | 2129 | |
56de859e | 2130 | rcu_read_lock(); |
e4c7ed41 | 2131 | if (dst->sa.sa_family == AF_INET) { |
c6fcc4fc | 2132 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
c46b7897 | 2133 | struct rtable *rt; |
0770b53b | 2134 | __be16 df = 0; |
c6fcc4fc | 2135 | |
655c3de1 | 2136 | rt = vxlan_get_route(vxlan, dev, sock4, skb, |
1a8496ba | 2137 | rdst ? rdst->remote_ifindex : 0, tos, |
272d96a5 | 2138 | dst->sin.sin_addr.s_addr, |
1158632b | 2139 | &local_ip.sin.sin_addr.s_addr, |
4ecb1d83 | 2140 | dst_port, src_port, |
d71785ff | 2141 | dst_cache, info); |
8ebd115b DM |
2142 | if (IS_ERR(rt)) { |
2143 | err = PTR_ERR(rt); | |
c46b7897 | 2144 | goto tx_error; |
8ebd115b | 2145 | } |
e4c7ed41 CW |
2146 | |
2147 | /* Bypass encapsulation if the destination is local */ | |
fee1fad7 | 2148 | if (!info) { |
2149 | err = encap_bypass_if_local(skb, dev, vxlan, dst, | |
2150 | dst_port, vni, &rt->dst, | |
2151 | rt->rt_flags); | |
2152 | if (err) | |
56de859e | 2153 | goto out_unlock; |
fee1fad7 | 2154 | } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) { |
6ceb31ca | 2155 | df = htons(IP_DF); |
fee1fad7 | 2156 | } |
6ceb31ca | 2157 | |
c46b7897 | 2158 | ndst = &rt->dst; |
e4c7ed41 CW |
2159 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
2160 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
c46b7897 | 2161 | err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr), |
54bfd872 | 2162 | vni, md, flags, udp_sum); |
f491e56d | 2163 | if (err < 0) |
c46b7897 | 2164 | goto tx_error; |
f491e56d | 2165 | |
1158632b | 2166 | udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr, |
f491e56d JB |
2167 | dst->sin.sin_addr.s_addr, tos, ttl, df, |
2168 | src_port, dst_port, xnet, !udp_sum); | |
e4c7ed41 CW |
2169 | #if IS_ENABLED(CONFIG_IPV6) |
2170 | } else { | |
c6fcc4fc | 2171 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
e4c7ed41 | 2172 | |
655c3de1 | 2173 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, |
1400615d | 2174 | rdst ? rdst->remote_ifindex : 0, tos, |
272d96a5 | 2175 | label, &dst->sin6.sin6_addr, |
1158632b | 2176 | &local_ip.sin6.sin6_addr, |
4ecb1d83 | 2177 | dst_port, src_port, |
db3c6139 | 2178 | dst_cache, info); |
e5d4b29f | 2179 | if (IS_ERR(ndst)) { |
8ebd115b | 2180 | err = PTR_ERR(ndst); |
c46b7897 | 2181 | ndst = NULL; |
9dcc71e1 | 2182 | goto tx_error; |
e4c7ed41 | 2183 | } |
655c3de1 | 2184 | |
fee1fad7 | 2185 | if (!info) { |
2186 | u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
49560532 | 2187 | |
fee1fad7 | 2188 | err = encap_bypass_if_local(skb, dev, vxlan, dst, |
2189 | dst_port, vni, ndst, | |
2190 | rt6i_flags); | |
2191 | if (err) | |
56de859e | 2192 | goto out_unlock; |
fee1fad7 | 2193 | } |
35e2d115 | 2194 | |
1400615d | 2195 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
e4c7ed41 | 2196 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
f491e56d JB |
2197 | skb_scrub_packet(skb, xnet); |
2198 | err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr), | |
54bfd872 | 2199 | vni, md, flags, udp_sum); |
c46b7897 | 2200 | if (err < 0) |
2201 | goto tx_error; | |
2202 | ||
0770b53b | 2203 | udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev, |
1158632b | 2204 | &local_ip.sin6.sin6_addr, |
272d96a5 | 2205 | &dst->sin6.sin6_addr, tos, ttl, |
e7f70af1 | 2206 | label, src_port, dst_port, !udp_sum); |
e4c7ed41 CW |
2207 | #endif |
2208 | } | |
56de859e JK |
2209 | out_unlock: |
2210 | rcu_read_unlock(); | |
4ad16930 | 2211 | return; |
d342894c | 2212 | |
2213 | drop: | |
2214 | dev->stats.tx_dropped++; | |
c46b7897 | 2215 | dev_kfree_skb(skb); |
2216 | return; | |
d342894c | 2217 | |
2218 | tx_error: | |
56de859e | 2219 | rcu_read_unlock(); |
655c3de1 | 2220 | if (err == -ELOOP) |
2221 | dev->stats.collisions++; | |
2222 | else if (err == -ENETUNREACH) | |
2223 | dev->stats.tx_carrier_errors++; | |
c46b7897 | 2224 | dst_release(ndst); |
d342894c | 2225 | dev->stats.tx_errors++; |
c46b7897 | 2226 | kfree_skb(skb); |
d342894c | 2227 | } |
2228 | ||
6681712d DS |
2229 | /* Transmit local packets over Vxlan |
2230 | * | |
2231 | * Outer IP header inherits ECN and DF from inner header. | |
2232 | * Outer UDP destination is the VXLAN assigned port. | |
2233 | * source port is based on hash of flow | |
2234 | */ | |
2235 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2236 | { | |
2237 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3093fbe7 | 2238 | const struct ip_tunnel_info *info; |
6681712d DS |
2239 | struct ethhdr *eth; |
2240 | bool did_rsc = false; | |
8f646c92 | 2241 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 2242 | struct vxlan_fdb *f; |
3ad7a4b1 | 2243 | __be32 vni = 0; |
6681712d | 2244 | |
61adedf3 | 2245 | info = skb_tunnel_info(skb); |
3093fbe7 | 2246 | |
6681712d | 2247 | skb_reset_mac_header(skb); |
6681712d | 2248 | |
47e5d1b0 | 2249 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA) { |
3ad7a4b1 RP |
2250 | if (info && info->mode & IP_TUNNEL_INFO_BRIDGE && |
2251 | info->mode & IP_TUNNEL_INFO_TX) { | |
2252 | vni = tunnel_id_to_key32(info->key.tun_id); | |
2253 | } else { | |
2254 | if (info && info->mode & IP_TUNNEL_INFO_TX) | |
2255 | vxlan_xmit_one(skb, dev, vni, NULL, false); | |
2256 | else | |
2257 | kfree_skb(skb); | |
2258 | return NETDEV_TX_OK; | |
2259 | } | |
47e5d1b0 JB |
2260 | } |
2261 | ||
2262 | if (vxlan->flags & VXLAN_F_PROXY) { | |
2263 | eth = eth_hdr(skb); | |
f564f45c | 2264 | if (ntohs(eth->h_proto) == ETH_P_ARP) |
3ad7a4b1 | 2265 | return arp_reduce(dev, skb, vni); |
f564f45c | 2266 | #if IS_ENABLED(CONFIG_IPV6) |
f1fb08f6 VB |
2267 | else if (ntohs(eth->h_proto) == ETH_P_IPV6) { |
2268 | struct ipv6hdr *hdr, _hdr; | |
2269 | if ((hdr = skb_header_pointer(skb, | |
2270 | skb_network_offset(skb), | |
2271 | sizeof(_hdr), &_hdr)) && | |
2272 | hdr->nexthdr == IPPROTO_ICMPV6) | |
2273 | return neigh_reduce(dev, skb, vni); | |
f564f45c CW |
2274 | } |
2275 | #endif | |
2276 | } | |
6681712d | 2277 | |
47e5d1b0 | 2278 | eth = eth_hdr(skb); |
3ad7a4b1 | 2279 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2280 | did_rsc = false; |
2281 | ||
2282 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
2283 | (ntohs(eth->h_proto) == ETH_P_IP || |
2284 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2285 | did_rsc = route_shortcircuit(dev, skb); |
2286 | if (did_rsc) | |
3ad7a4b1 | 2287 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2288 | } |
2289 | ||
6681712d | 2290 | if (f == NULL) { |
3ad7a4b1 | 2291 | f = vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae MR |
2292 | if (f == NULL) { |
2293 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
2294 | !is_multicast_ether_addr(eth->h_dest)) | |
2295 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2296 | ||
2297 | dev->stats.tx_dropped++; | |
8f646c92 | 2298 | kfree_skb(skb); |
afbd8bae MR |
2299 | return NETDEV_TX_OK; |
2300 | } | |
2301 | } | |
6681712d | 2302 | |
afbd8bae MR |
2303 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2304 | struct sk_buff *skb1; | |
6681712d | 2305 | |
8f646c92 ED |
2306 | if (!fdst) { |
2307 | fdst = rdst; | |
2308 | continue; | |
2309 | } | |
afbd8bae MR |
2310 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2311 | if (skb1) | |
3ad7a4b1 | 2312 | vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc); |
6681712d DS |
2313 | } |
2314 | ||
8f646c92 | 2315 | if (fdst) |
3ad7a4b1 | 2316 | vxlan_xmit_one(skb, dev, vni, fdst, did_rsc); |
8f646c92 ED |
2317 | else |
2318 | kfree_skb(skb); | |
4ad16930 | 2319 | return NETDEV_TX_OK; |
6681712d DS |
2320 | } |
2321 | ||
d342894c | 2322 | /* Walk the forwarding table and purge stale entries */ |
2323 | static void vxlan_cleanup(unsigned long arg) | |
2324 | { | |
2325 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2326 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2327 | unsigned int h; | |
2328 | ||
2329 | if (!netif_running(vxlan->dev)) | |
2330 | return; | |
2331 | ||
d342894c | 2332 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2333 | struct hlist_node *p, *n; | |
14e1d0fa SD |
2334 | |
2335 | spin_lock_bh(&vxlan->hash_lock); | |
d342894c | 2336 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2337 | struct vxlan_fdb *f | |
2338 | = container_of(p, struct vxlan_fdb, hlist); | |
2339 | unsigned long timeout; | |
2340 | ||
efb5f68f | 2341 | if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
d342894c | 2342 | continue; |
2343 | ||
def499c9 RP |
2344 | if (f->flags & NTF_EXT_LEARNED) |
2345 | continue; | |
2346 | ||
0dfbdf41 | 2347 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2348 | if (time_before_eq(timeout, jiffies)) { |
2349 | netdev_dbg(vxlan->dev, | |
2350 | "garbage collect %pM\n", | |
2351 | f->eth_addr); | |
2352 | f->state = NUD_STALE; | |
2353 | vxlan_fdb_destroy(vxlan, f); | |
2354 | } else if (time_before(timeout, next_timer)) | |
2355 | next_timer = timeout; | |
2356 | } | |
14e1d0fa | 2357 | spin_unlock_bh(&vxlan->hash_lock); |
d342894c | 2358 | } |
d342894c | 2359 | |
2360 | mod_timer(&vxlan->age_timer, next_timer); | |
2361 | } | |
2362 | ||
a53cb29b MB |
2363 | static void vxlan_vs_del_dev(struct vxlan_dev *vxlan) |
2364 | { | |
2365 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); | |
2366 | ||
2367 | spin_lock(&vn->sock_lock); | |
2368 | hlist_del_init_rcu(&vxlan->hlist); | |
2369 | spin_unlock(&vn->sock_lock); | |
2370 | } | |
2371 | ||
9c2e24e1 PS |
2372 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2373 | { | |
56ef9c90 | 2374 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
54bfd872 | 2375 | __be32 vni = vxlan->default_dst.remote_vni; |
9c2e24e1 | 2376 | |
56ef9c90 | 2377 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 2378 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); |
56ef9c90 | 2379 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
2380 | } |
2381 | ||
d342894c | 2382 | /* Setup stats when device is created */ |
2383 | static int vxlan_init(struct net_device *dev) | |
2384 | { | |
1c213bd2 | 2385 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2386 | if (!dev->tstats) |
d342894c | 2387 | return -ENOMEM; |
2388 | ||
2389 | return 0; | |
2390 | } | |
2391 | ||
3ad7a4b1 | 2392 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni) |
afbd8bae MR |
2393 | { |
2394 | struct vxlan_fdb *f; | |
2395 | ||
2396 | spin_lock_bh(&vxlan->hash_lock); | |
3ad7a4b1 | 2397 | f = __vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae MR |
2398 | if (f) |
2399 | vxlan_fdb_destroy(vxlan, f); | |
2400 | spin_unlock_bh(&vxlan->hash_lock); | |
2401 | } | |
2402 | ||
ebf4063e SH |
2403 | static void vxlan_uninit(struct net_device *dev) |
2404 | { | |
2405 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 2406 | |
3ad7a4b1 | 2407 | vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni); |
afbd8bae | 2408 | |
ebf4063e SH |
2409 | free_percpu(dev->tstats); |
2410 | } | |
2411 | ||
d342894c | 2412 | /* Start ageing timer and join group when device is brought up */ |
2413 | static int vxlan_open(struct net_device *dev) | |
2414 | { | |
2415 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
205f356d | 2416 | int ret; |
56ef9c90 | 2417 | |
205f356d JB |
2418 | ret = vxlan_sock_add(vxlan); |
2419 | if (ret < 0) | |
2420 | return ret; | |
d342894c | 2421 | |
79d4a94f | 2422 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 | 2423 | ret = vxlan_igmp_join(vxlan); |
bef0057b MRL |
2424 | if (ret == -EADDRINUSE) |
2425 | ret = 0; | |
56ef9c90 | 2426 | if (ret) { |
205f356d | 2427 | vxlan_sock_release(vxlan); |
56ef9c90 MRL |
2428 | return ret; |
2429 | } | |
d342894c | 2430 | } |
2431 | ||
0dfbdf41 | 2432 | if (vxlan->cfg.age_interval) |
d342894c | 2433 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
2434 | ||
56ef9c90 | 2435 | return ret; |
d342894c | 2436 | } |
2437 | ||
2438 | /* Purge the forwarding table */ | |
8b3f9337 | 2439 | static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all) |
d342894c | 2440 | { |
31fec5aa | 2441 | unsigned int h; |
d342894c | 2442 | |
2443 | spin_lock_bh(&vxlan->hash_lock); | |
2444 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2445 | struct hlist_node *p, *n; | |
2446 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2447 | struct vxlan_fdb *f | |
2448 | = container_of(p, struct vxlan_fdb, hlist); | |
8b3f9337 RP |
2449 | if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP))) |
2450 | continue; | |
afbd8bae MR |
2451 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2452 | if (!is_zero_ether_addr(f->eth_addr)) | |
2453 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2454 | } |
2455 | } | |
2456 | spin_unlock_bh(&vxlan->hash_lock); | |
2457 | } | |
2458 | ||
2459 | /* Cleanup timer and forwarding table on shutdown */ | |
2460 | static int vxlan_stop(struct net_device *dev) | |
2461 | { | |
2462 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2463 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
56ef9c90 | 2464 | int ret = 0; |
d342894c | 2465 | |
24c0e683 | 2466 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 2467 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 2468 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 2469 | |
2470 | del_timer_sync(&vxlan->age_timer); | |
2471 | ||
8b3f9337 | 2472 | vxlan_flush(vxlan, false); |
205f356d | 2473 | vxlan_sock_release(vxlan); |
d342894c | 2474 | |
56ef9c90 | 2475 | return ret; |
d342894c | 2476 | } |
2477 | ||
d342894c | 2478 | /* Stub, nothing needs to be done. */ |
2479 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2480 | { | |
2481 | } | |
2482 | ||
91572088 | 2483 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
345010b5 | 2484 | { |
91572088 JW |
2485 | struct vxlan_dev *vxlan = netdev_priv(dev); |
2486 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2487 | struct net_device *lowerdev = __dev_get_by_index(vxlan->net, | |
2488 | dst->remote_ifindex); | |
2489 | bool use_ipv6 = false; | |
345010b5 DB |
2490 | |
2491 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
91572088 | 2492 | use_ipv6 = true; |
345010b5 | 2493 | |
91572088 JW |
2494 | /* This check is different than dev->max_mtu, because it looks at |
2495 | * the lowerdev->mtu, rather than the static dev->max_mtu | |
2496 | */ | |
2497 | if (lowerdev) { | |
2498 | int max_mtu = lowerdev->mtu - | |
2499 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); | |
2500 | if (new_mtu > max_mtu) | |
72564b59 | 2501 | return -EINVAL; |
72564b59 DW |
2502 | } |
2503 | ||
345010b5 DB |
2504 | dev->mtu = new_mtu; |
2505 | return 0; | |
2506 | } | |
2507 | ||
fc4099f1 PS |
2508 | static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
2509 | { | |
2510 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2511 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
2512 | __be16 sport, dport; | |
2513 | ||
2514 | sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, | |
2515 | vxlan->cfg.port_max, true); | |
2516 | dport = info->key.tp_dst ? : vxlan->cfg.dst_port; | |
2517 | ||
239e944f | 2518 | if (ip_tunnel_info_af(info) == AF_INET) { |
c6fcc4fc | 2519 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
1a8496ba JB |
2520 | struct rtable *rt; |
2521 | ||
655c3de1 | 2522 | rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos, |
1a8496ba | 2523 | info->key.u.ipv4.dst, |
22f0708a PA |
2524 | &info->key.u.ipv4.src, dport, sport, |
2525 | &info->dst_cache, info); | |
1a8496ba JB |
2526 | if (IS_ERR(rt)) |
2527 | return PTR_ERR(rt); | |
2528 | ip_rt_put(rt); | |
239e944f JB |
2529 | } else { |
2530 | #if IS_ENABLED(CONFIG_IPV6) | |
03dc52a8 | 2531 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
239e944f JB |
2532 | struct dst_entry *ndst; |
2533 | ||
655c3de1 | 2534 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos, |
e7f70af1 | 2535 | info->key.label, &info->key.u.ipv6.dst, |
22f0708a PA |
2536 | &info->key.u.ipv6.src, dport, sport, |
2537 | &info->dst_cache, info); | |
239e944f JB |
2538 | if (IS_ERR(ndst)) |
2539 | return PTR_ERR(ndst); | |
2540 | dst_release(ndst); | |
239e944f JB |
2541 | #else /* !CONFIG_IPV6 */ |
2542 | return -EPFNOSUPPORT; | |
2543 | #endif | |
2544 | } | |
1a8496ba JB |
2545 | info->key.tp_src = sport; |
2546 | info->key.tp_dst = dport; | |
239e944f | 2547 | return 0; |
fc4099f1 PS |
2548 | } |
2549 | ||
0c867c9b | 2550 | static const struct net_device_ops vxlan_netdev_ether_ops = { |
d342894c | 2551 | .ndo_init = vxlan_init, |
ebf4063e | 2552 | .ndo_uninit = vxlan_uninit, |
d342894c | 2553 | .ndo_open = vxlan_open, |
2554 | .ndo_stop = vxlan_stop, | |
2555 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2556 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2557 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2558 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2559 | .ndo_validate_addr = eth_validate_addr, |
2560 | .ndo_set_mac_address = eth_mac_addr, | |
2561 | .ndo_fdb_add = vxlan_fdb_add, | |
2562 | .ndo_fdb_del = vxlan_fdb_delete, | |
2563 | .ndo_fdb_dump = vxlan_fdb_dump, | |
fc4099f1 | 2564 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
d342894c | 2565 | }; |
2566 | ||
e1e5314d JB |
2567 | static const struct net_device_ops vxlan_netdev_raw_ops = { |
2568 | .ndo_init = vxlan_init, | |
2569 | .ndo_uninit = vxlan_uninit, | |
2570 | .ndo_open = vxlan_open, | |
2571 | .ndo_stop = vxlan_stop, | |
2572 | .ndo_start_xmit = vxlan_xmit, | |
2573 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
2574 | .ndo_change_mtu = vxlan_change_mtu, | |
2575 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, | |
2576 | }; | |
2577 | ||
d342894c | 2578 | /* Info for udev, that this is a virtual tunnel endpoint */ |
2579 | static struct device_type vxlan_type = { | |
2580 | .name = "vxlan", | |
2581 | }; | |
2582 | ||
e5de25dc | 2583 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
35e42379 | 2584 | * supply the listening VXLAN udp ports. Callers are expected |
e5de25dc | 2585 | * to implement the ndo_udp_tunnel_add. |
53cf5275 | 2586 | */ |
b7aade15 | 2587 | static void vxlan_push_rx_ports(struct net_device *dev) |
53cf5275 JG |
2588 | { |
2589 | struct vxlan_sock *vs; | |
2590 | struct net *net = dev_net(dev); | |
2591 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
35e42379 | 2592 | unsigned int i; |
53cf5275 JG |
2593 | |
2594 | spin_lock(&vn->sock_lock); | |
2595 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
e7b3db5e AD |
2596 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) |
2597 | udp_tunnel_push_rx_port(dev, vs->sock, | |
b9adcd69 AD |
2598 | (vs->flags & VXLAN_F_GPE) ? |
2599 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 2600 | UDP_TUNNEL_TYPE_VXLAN); |
53cf5275 JG |
2601 | } |
2602 | spin_unlock(&vn->sock_lock); | |
2603 | } | |
53cf5275 | 2604 | |
d342894c | 2605 | /* Initialize the device structure. */ |
2606 | static void vxlan_setup(struct net_device *dev) | |
2607 | { | |
2608 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2609 | unsigned int h; |
d342894c | 2610 | |
65226ef8 JB |
2611 | eth_hw_addr_random(dev); |
2612 | ether_setup(dev); | |
2613 | ||
ebf4063e | 2614 | dev->destructor = free_netdev; |
d342894c | 2615 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2616 | ||
d342894c | 2617 | dev->features |= NETIF_F_LLTX; |
d6727fe3 | 2618 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2619 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2620 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2621 | |
1eaa8178 | 2622 | dev->vlan_features = dev->features; |
0afb1666 | 2623 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2624 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
02875878 | 2625 | netif_keep_dst(dev); |
0c867c9b | 2626 | dev->priv_flags |= IFF_NO_QUEUE; |
d342894c | 2627 | |
553675fb | 2628 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2629 | spin_lock_init(&vxlan->hash_lock); |
2630 | ||
2631 | init_timer_deferrable(&vxlan->age_timer); | |
2632 | vxlan->age_timer.function = vxlan_cleanup; | |
2633 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2634 | ||
0dfbdf41 | 2635 | vxlan->cfg.dst_port = htons(vxlan_port); |
05f47d69 | 2636 | |
d342894c | 2637 | vxlan->dev = dev; |
2638 | ||
58ce31cc TH |
2639 | gro_cells_init(&vxlan->gro_cells, dev); |
2640 | ||
d342894c | 2641 | for (h = 0; h < FDB_HASH_SIZE; ++h) |
2642 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2643 | } | |
2644 | ||
0c867c9b JB |
2645 | static void vxlan_ether_setup(struct net_device *dev) |
2646 | { | |
0c867c9b JB |
2647 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
2648 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
2649 | dev->netdev_ops = &vxlan_netdev_ether_ops; | |
2650 | } | |
2651 | ||
e1e5314d JB |
2652 | static void vxlan_raw_setup(struct net_device *dev) |
2653 | { | |
65226ef8 | 2654 | dev->header_ops = NULL; |
e1e5314d JB |
2655 | dev->type = ARPHRD_NONE; |
2656 | dev->hard_header_len = 0; | |
2657 | dev->addr_len = 0; | |
e1e5314d JB |
2658 | dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; |
2659 | dev->netdev_ops = &vxlan_netdev_raw_ops; | |
2660 | } | |
2661 | ||
d342894c | 2662 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { |
2663 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2664 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2665 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2666 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2667 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2668 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2669 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2670 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
e7f70af1 | 2671 | [IFLA_VXLAN_LABEL] = { .type = NLA_U32 }, |
d342894c | 2672 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, |
2673 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2674 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2675 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2676 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2677 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2678 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2679 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
f8a9b1bc | 2680 | [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
823aa873 | 2681 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
2682 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
2683 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
2684 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
2685 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
2686 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 2687 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
e1e5314d | 2688 | [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, }, |
0ace2ca8 | 2689 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
d342894c | 2690 | }; |
2691 | ||
2692 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2693 | { | |
2694 | if (tb[IFLA_ADDRESS]) { | |
2695 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2696 | pr_debug("invalid link address (not ethernet)\n"); | |
2697 | return -EINVAL; | |
2698 | } | |
2699 | ||
2700 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2701 | pr_debug("invalid all zero ethernet address\n"); | |
2702 | return -EADDRNOTAVAIL; | |
2703 | } | |
2704 | } | |
2705 | ||
2706 | if (!data) | |
2707 | return -EINVAL; | |
2708 | ||
2709 | if (data[IFLA_VXLAN_ID]) { | |
2710 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
4e37d691 | 2711 | if (id >= VXLAN_N_VID) |
d342894c | 2712 | return -ERANGE; |
2713 | } | |
2714 | ||
05f47d69 | 2715 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2716 | const struct ifla_vxlan_port_range *p | |
2717 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2718 | ||
2719 | if (ntohs(p->high) < ntohs(p->low)) { | |
2720 | pr_debug("port range %u .. %u not valid\n", | |
2721 | ntohs(p->low), ntohs(p->high)); | |
2722 | return -EINVAL; | |
2723 | } | |
2724 | } | |
2725 | ||
d342894c | 2726 | return 0; |
2727 | } | |
2728 | ||
1b13c97f YB |
2729 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2730 | struct ethtool_drvinfo *drvinfo) | |
2731 | { | |
2732 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2733 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2734 | } | |
2735 | ||
2736 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2737 | .get_drvinfo = vxlan_get_drvinfo, | |
2738 | .get_link = ethtool_op_get_link, | |
2739 | }; | |
2740 | ||
3ee64f39 TH |
2741 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2742 | __be16 port, u32 flags) | |
553675fb | 2743 | { |
e4c7ed41 | 2744 | struct socket *sock; |
3ee64f39 TH |
2745 | struct udp_port_cfg udp_conf; |
2746 | int err; | |
e4c7ed41 | 2747 | |
3ee64f39 | 2748 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2749 | |
3ee64f39 TH |
2750 | if (ipv6) { |
2751 | udp_conf.family = AF_INET6; | |
3ee64f39 | 2752 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 2753 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
a43a9ef6 | 2754 | udp_conf.ipv6_v6only = 1; |
3ee64f39 TH |
2755 | } else { |
2756 | udp_conf.family = AF_INET; | |
e4c7ed41 | 2757 | } |
e4c7ed41 | 2758 | |
3ee64f39 | 2759 | udp_conf.local_udp_port = port; |
553675fb | 2760 | |
3ee64f39 TH |
2761 | /* Open UDP socket */ |
2762 | err = udp_sock_create(net, &udp_conf, &sock); | |
2763 | if (err < 0) | |
2764 | return ERR_PTR(err); | |
e4c7ed41 | 2765 | |
39deb2c7 | 2766 | return sock; |
e4c7ed41 CW |
2767 | } |
2768 | ||
2769 | /* Create new listen socket if needed */ | |
b1be00a6 JB |
2770 | static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6, |
2771 | __be16 port, u32 flags) | |
e4c7ed41 CW |
2772 | { |
2773 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2774 | struct vxlan_sock *vs; | |
2775 | struct socket *sock; | |
e4c7ed41 | 2776 | unsigned int h; |
acbf74a7 | 2777 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 2778 | |
dc01e7d3 | 2779 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2780 | if (!vs) |
2781 | return ERR_PTR(-ENOMEM); | |
2782 | ||
2783 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2784 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2785 | ||
3ee64f39 | 2786 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 2787 | if (IS_ERR(sock)) { |
553675fb | 2788 | kfree(vs); |
e50fddc8 | 2789 | return ERR_CAST(sock); |
553675fb | 2790 | } |
e4c7ed41 CW |
2791 | |
2792 | vs->sock = sock; | |
9c2e24e1 | 2793 | atomic_set(&vs->refcnt, 1); |
af33c1ad | 2794 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 2795 | |
9c2e24e1 PS |
2796 | spin_lock(&vn->sock_lock); |
2797 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
e7b3db5e | 2798 | udp_tunnel_notify_add_rx_port(sock, |
b9adcd69 AD |
2799 | (vs->flags & VXLAN_F_GPE) ? |
2800 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 2801 | UDP_TUNNEL_TYPE_VXLAN); |
9c2e24e1 | 2802 | spin_unlock(&vn->sock_lock); |
553675fb | 2803 | |
2804 | /* Mark socket as an encapsulation socket. */ | |
5602c48c | 2805 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
acbf74a7 AZ |
2806 | tunnel_cfg.sk_user_data = vs; |
2807 | tunnel_cfg.encap_type = 1; | |
f2d1968e | 2808 | tunnel_cfg.encap_rcv = vxlan_rcv; |
acbf74a7 | 2809 | tunnel_cfg.encap_destroy = NULL; |
5602c48c TH |
2810 | tunnel_cfg.gro_receive = vxlan_gro_receive; |
2811 | tunnel_cfg.gro_complete = vxlan_gro_complete; | |
acbf74a7 AZ |
2812 | |
2813 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 2814 | |
9c2e24e1 PS |
2815 | return vs; |
2816 | } | |
2817 | ||
b1be00a6 | 2818 | static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6) |
9c2e24e1 | 2819 | { |
205f356d JB |
2820 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
2821 | struct vxlan_sock *vs = NULL; | |
9c2e24e1 | 2822 | |
205f356d | 2823 | if (!vxlan->cfg.no_share) { |
56ef9c90 | 2824 | spin_lock(&vn->sock_lock); |
205f356d JB |
2825 | vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
2826 | vxlan->cfg.dst_port, vxlan->flags); | |
2827 | if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) { | |
56ef9c90 | 2828 | spin_unlock(&vn->sock_lock); |
205f356d | 2829 | return -EBUSY; |
56ef9c90 MRL |
2830 | } |
2831 | spin_unlock(&vn->sock_lock); | |
2832 | } | |
205f356d | 2833 | if (!vs) |
b1be00a6 JB |
2834 | vs = vxlan_socket_create(vxlan->net, ipv6, |
2835 | vxlan->cfg.dst_port, vxlan->flags); | |
205f356d JB |
2836 | if (IS_ERR(vs)) |
2837 | return PTR_ERR(vs); | |
b1be00a6 JB |
2838 | #if IS_ENABLED(CONFIG_IPV6) |
2839 | if (ipv6) | |
c6fcc4fc | 2840 | rcu_assign_pointer(vxlan->vn6_sock, vs); |
b1be00a6 JB |
2841 | else |
2842 | #endif | |
c6fcc4fc | 2843 | rcu_assign_pointer(vxlan->vn4_sock, vs); |
205f356d JB |
2844 | vxlan_vs_add_dev(vs, vxlan); |
2845 | return 0; | |
553675fb | 2846 | } |
2847 | ||
b1be00a6 JB |
2848 | static int vxlan_sock_add(struct vxlan_dev *vxlan) |
2849 | { | |
b1be00a6 | 2850 | bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA; |
d074bf96 JB |
2851 | bool ipv6 = vxlan->flags & VXLAN_F_IPV6 || metadata; |
2852 | bool ipv4 = !ipv6 || metadata; | |
b1be00a6 JB |
2853 | int ret = 0; |
2854 | ||
c6fcc4fc | 2855 | RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
b1be00a6 | 2856 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 2857 | RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
d074bf96 | 2858 | if (ipv6) { |
b1be00a6 | 2859 | ret = __vxlan_sock_add(vxlan, true); |
d074bf96 JB |
2860 | if (ret < 0 && ret != -EAFNOSUPPORT) |
2861 | ipv4 = false; | |
2862 | } | |
b1be00a6 | 2863 | #endif |
d074bf96 | 2864 | if (ipv4) |
b1be00a6 JB |
2865 | ret = __vxlan_sock_add(vxlan, false); |
2866 | if (ret < 0) | |
2867 | vxlan_sock_release(vxlan); | |
2868 | return ret; | |
2869 | } | |
2870 | ||
0dfbdf41 | 2871 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
8bcdc4f3 RP |
2872 | struct vxlan_config *conf, |
2873 | bool changelink) | |
d342894c | 2874 | { |
33564bbb | 2875 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
07b9b37c | 2876 | struct vxlan_dev *vxlan = netdev_priv(dev), *tmp; |
c7995c43 | 2877 | struct vxlan_rdst *dst = &vxlan->default_dst; |
b1be00a6 | 2878 | unsigned short needed_headroom = ETH_HLEN; |
e4c7ed41 | 2879 | bool use_ipv6 = false; |
0dfbdf41 | 2880 | __be16 default_port = vxlan->cfg.dst_port; |
7e059158 | 2881 | struct net_device *lowerdev = NULL; |
d342894c | 2882 | |
8bcdc4f3 RP |
2883 | if (!changelink) { |
2884 | if (conf->flags & VXLAN_F_GPE) { | |
2885 | /* For now, allow GPE only together with | |
2886 | * COLLECT_METADATA. This can be relaxed later; in such | |
2887 | * case, the other side of the PtP link will have to be | |
2888 | * provided. | |
2889 | */ | |
2890 | if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) || | |
2891 | !(conf->flags & VXLAN_F_COLLECT_METADATA)) { | |
2892 | pr_info("unsupported combination of extensions\n"); | |
2893 | return -EINVAL; | |
2894 | } | |
2895 | vxlan_raw_setup(dev); | |
2896 | } else { | |
2897 | vxlan_ether_setup(dev); | |
3555621d | 2898 | } |
e1e5314d | 2899 | |
8bcdc4f3 RP |
2900 | /* MTU range: 68 - 65535 */ |
2901 | dev->min_mtu = ETH_MIN_MTU; | |
2902 | dev->max_mtu = ETH_MAX_MTU; | |
2903 | vxlan->net = src_net; | |
e1e5314d | 2904 | } |
0c867c9b | 2905 | |
0dfbdf41 | 2906 | dst->remote_vni = conf->vni; |
d342894c | 2907 | |
0dfbdf41 | 2908 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); |
d342894c | 2909 | |
0dfbdf41 TG |
2910 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2911 | if (!dst->remote_ip.sa.sa_family) | |
2912 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 | 2913 | |
0dfbdf41 | 2914 | if (dst->remote_ip.sa.sa_family == AF_INET6 || |
057ba29b JB |
2915 | vxlan->cfg.saddr.sa.sa_family == AF_INET6) { |
2916 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2917 | return -EPFNOSUPPORT; | |
e4c7ed41 | 2918 | use_ipv6 = true; |
b1be00a6 | 2919 | vxlan->flags |= VXLAN_F_IPV6; |
057ba29b | 2920 | } |
d342894c | 2921 | |
e7f70af1 DB |
2922 | if (conf->label && !use_ipv6) { |
2923 | pr_info("label only supported in use with IPv6\n"); | |
2924 | return -EINVAL; | |
2925 | } | |
2926 | ||
8bcdc4f3 RP |
2927 | if (conf->remote_ifindex && |
2928 | conf->remote_ifindex != vxlan->cfg.remote_ifindex) { | |
7e059158 | 2929 | lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex); |
0dfbdf41 | 2930 | dst->remote_ifindex = conf->remote_ifindex; |
34e02aa1 | 2931 | |
2932 | if (!lowerdev) { | |
8bcdc4f3 RP |
2933 | pr_info("ifindex %d does not exist\n", |
2934 | dst->remote_ifindex); | |
34e02aa1 | 2935 | return -ENODEV; |
2936 | } | |
d342894c | 2937 | |
e4c7ed41 CW |
2938 | #if IS_ENABLED(CONFIG_IPV6) |
2939 | if (use_ipv6) { | |
2940 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2941 | if (idev && idev->cnf.disable_ipv6) { | |
2942 | pr_info("IPv6 is disabled via sysctl\n"); | |
2943 | return -EPERM; | |
2944 | } | |
e4c7ed41 CW |
2945 | } |
2946 | #endif | |
2947 | ||
0dfbdf41 | 2948 | if (!conf->mtu) |
91572088 JW |
2949 | dev->mtu = lowerdev->mtu - |
2950 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); | |
1ba56fb4 | 2951 | |
b1be00a6 | 2952 | needed_headroom = lowerdev->hard_header_len; |
8bcdc4f3 RP |
2953 | } else if (!conf->remote_ifindex && |
2954 | vxlan_addr_multicast(&dst->remote_ip)) { | |
9b4cdd51 JB |
2955 | pr_info("multicast destination requires interface to be specified\n"); |
2956 | return -EINVAL; | |
9dc2ad10 | 2957 | } |
d342894c | 2958 | |
d6acfeb1 FM |
2959 | if (lowerdev) { |
2960 | dev->gso_max_size = lowerdev->gso_max_size; | |
2961 | dev->gso_max_segs = lowerdev->gso_max_segs; | |
2962 | } | |
2963 | ||
7e059158 | 2964 | if (conf->mtu) { |
91572088 JW |
2965 | int max_mtu = ETH_MAX_MTU; |
2966 | ||
2967 | if (lowerdev) | |
2968 | max_mtu = lowerdev->mtu; | |
2969 | ||
2970 | max_mtu -= (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); | |
2971 | ||
2972 | if (conf->mtu < dev->min_mtu || conf->mtu > dev->max_mtu) | |
2973 | return -EINVAL; | |
2974 | ||
2975 | dev->mtu = conf->mtu; | |
2976 | ||
2977 | if (conf->mtu > max_mtu) | |
2978 | dev->mtu = max_mtu; | |
7e059158 DW |
2979 | } |
2980 | ||
b1be00a6 JB |
2981 | if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) |
2982 | needed_headroom += VXLAN6_HEADROOM; | |
2983 | else | |
2984 | needed_headroom += VXLAN_HEADROOM; | |
2985 | dev->needed_headroom = needed_headroom; | |
2986 | ||
0dfbdf41 | 2987 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
e1e5314d JB |
2988 | if (!vxlan->cfg.dst_port) { |
2989 | if (conf->flags & VXLAN_F_GPE) | |
d5ff72d9 | 2990 | vxlan->cfg.dst_port = htons(4790); /* IANA VXLAN-GPE port */ |
e1e5314d JB |
2991 | else |
2992 | vxlan->cfg.dst_port = default_port; | |
2993 | } | |
0dfbdf41 TG |
2994 | vxlan->flags |= conf->flags; |
2995 | ||
2996 | if (!vxlan->cfg.age_interval) | |
2997 | vxlan->cfg.age_interval = FDB_AGE_DEFAULT; | |
2998 | ||
8bcdc4f3 RP |
2999 | if (changelink) |
3000 | return 0; | |
3001 | ||
07b9b37c ND |
3002 | list_for_each_entry(tmp, &vn->vxlan_list, next) { |
3003 | if (tmp->cfg.vni == conf->vni && | |
3004 | (tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 || | |
3005 | tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 && | |
3006 | tmp->cfg.dst_port == vxlan->cfg.dst_port && | |
3007 | (tmp->flags & VXLAN_F_RCV_FLAGS) == | |
3555621d JB |
3008 | (vxlan->flags & VXLAN_F_RCV_FLAGS)) { |
3009 | pr_info("duplicate VNI %u\n", be32_to_cpu(conf->vni)); | |
3010 | return -EEXIST; | |
3011 | } | |
07b9b37c | 3012 | } |
0dfbdf41 | 3013 | |
0dfbdf41 TG |
3014 | return 0; |
3015 | } | |
3016 | ||
c80498e3 ND |
3017 | static int __vxlan_dev_create(struct net *net, struct net_device *dev, |
3018 | struct vxlan_config *conf) | |
3019 | { | |
3020 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3021 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3022 | int err; | |
3023 | ||
3024 | err = vxlan_dev_configure(net, dev, conf, false); | |
3025 | if (err) | |
3026 | return err; | |
3027 | ||
3028 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
3029 | ||
3030 | /* create an fdb entry for a valid default destination */ | |
3031 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
3032 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
3033 | &vxlan->default_dst.remote_ip, | |
3034 | NUD_REACHABLE | NUD_PERMANENT, | |
3035 | NLM_F_EXCL | NLM_F_CREATE, | |
3036 | vxlan->cfg.dst_port, | |
3037 | vxlan->default_dst.remote_vni, | |
3038 | vxlan->default_dst.remote_vni, | |
3039 | vxlan->default_dst.remote_ifindex, | |
3040 | NTF_SELF); | |
3041 | if (err) | |
3042 | return err; | |
3043 | } | |
3044 | ||
3045 | err = register_netdevice(dev); | |
3046 | if (err) { | |
3047 | vxlan_fdb_delete_default(vxlan, vxlan->default_dst.remote_vni); | |
3048 | return err; | |
3049 | } | |
3050 | ||
3051 | list_add(&vxlan->next, &vn->vxlan_list); | |
3052 | return 0; | |
3053 | } | |
3054 | ||
8bcdc4f3 RP |
3055 | static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[], |
3056 | struct net_device *dev, struct vxlan_config *conf, | |
3057 | bool changelink) | |
0dfbdf41 | 3058 | { |
8bcdc4f3 | 3059 | struct vxlan_dev *vxlan = netdev_priv(dev); |
0dfbdf41 | 3060 | |
8bcdc4f3 | 3061 | memset(conf, 0, sizeof(*conf)); |
e277de5f | 3062 | |
8bcdc4f3 RP |
3063 | /* if changelink operation, start with old existing cfg */ |
3064 | if (changelink) | |
3065 | memcpy(conf, &vxlan->cfg, sizeof(*conf)); | |
3066 | ||
3067 | if (data[IFLA_VXLAN_ID]) { | |
3068 | __be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); | |
3069 | ||
3070 | if (changelink && (vni != conf->vni)) | |
3071 | return -EOPNOTSUPP; | |
3072 | conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); | |
3073 | } | |
0dfbdf41 TG |
3074 | |
3075 | if (data[IFLA_VXLAN_GROUP]) { | |
8bcdc4f3 | 3076 | conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); |
0dfbdf41 TG |
3077 | } else if (data[IFLA_VXLAN_GROUP6]) { |
3078 | if (!IS_ENABLED(CONFIG_IPV6)) | |
3079 | return -EPFNOSUPPORT; | |
3080 | ||
8bcdc4f3 RP |
3081 | conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); |
3082 | conf->remote_ip.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
3083 | } |
3084 | ||
3085 | if (data[IFLA_VXLAN_LOCAL]) { | |
8bcdc4f3 RP |
3086 | conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); |
3087 | conf->saddr.sa.sa_family = AF_INET; | |
0dfbdf41 TG |
3088 | } else if (data[IFLA_VXLAN_LOCAL6]) { |
3089 | if (!IS_ENABLED(CONFIG_IPV6)) | |
3090 | return -EPFNOSUPPORT; | |
3091 | ||
3092 | /* TODO: respect scope id */ | |
8bcdc4f3 RP |
3093 | conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); |
3094 | conf->saddr.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
3095 | } |
3096 | ||
3097 | if (data[IFLA_VXLAN_LINK]) | |
8bcdc4f3 | 3098 | conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); |
0dfbdf41 | 3099 | |
d342894c | 3100 | if (data[IFLA_VXLAN_TOS]) |
8bcdc4f3 | 3101 | conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 3102 | |
afb97186 | 3103 | if (data[IFLA_VXLAN_TTL]) |
8bcdc4f3 | 3104 | conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 3105 | |
e7f70af1 | 3106 | if (data[IFLA_VXLAN_LABEL]) |
8bcdc4f3 | 3107 | conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) & |
e7f70af1 DB |
3108 | IPV6_FLOWLABEL_MASK; |
3109 | ||
8bcdc4f3 RP |
3110 | if (data[IFLA_VXLAN_LEARNING]) { |
3111 | if (nla_get_u8(data[IFLA_VXLAN_LEARNING])) { | |
3112 | conf->flags |= VXLAN_F_LEARN; | |
3113 | } else { | |
3114 | conf->flags &= ~VXLAN_F_LEARN; | |
3115 | vxlan->flags &= ~VXLAN_F_LEARN; | |
3116 | } | |
3117 | } else if (!changelink) { | |
3118 | /* default to learn on a new device */ | |
3119 | conf->flags |= VXLAN_F_LEARN; | |
3120 | } | |
d342894c | 3121 | |
8bcdc4f3 RP |
3122 | if (data[IFLA_VXLAN_AGEING]) { |
3123 | if (changelink) | |
3124 | return -EOPNOTSUPP; | |
3125 | conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
3126 | } | |
d342894c | 3127 | |
8bcdc4f3 RP |
3128 | if (data[IFLA_VXLAN_PROXY]) { |
3129 | if (changelink) | |
3130 | return -EOPNOTSUPP; | |
3131 | if (nla_get_u8(data[IFLA_VXLAN_PROXY])) | |
3132 | conf->flags |= VXLAN_F_PROXY; | |
3133 | } | |
e4f67add | 3134 | |
8bcdc4f3 RP |
3135 | if (data[IFLA_VXLAN_RSC]) { |
3136 | if (changelink) | |
3137 | return -EOPNOTSUPP; | |
3138 | if (nla_get_u8(data[IFLA_VXLAN_RSC])) | |
3139 | conf->flags |= VXLAN_F_RSC; | |
3140 | } | |
e4f67add | 3141 | |
8bcdc4f3 RP |
3142 | if (data[IFLA_VXLAN_L2MISS]) { |
3143 | if (changelink) | |
3144 | return -EOPNOTSUPP; | |
3145 | if (nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
3146 | conf->flags |= VXLAN_F_L2MISS; | |
3147 | } | |
e4f67add | 3148 | |
8bcdc4f3 RP |
3149 | if (data[IFLA_VXLAN_L3MISS]) { |
3150 | if (changelink) | |
3151 | return -EOPNOTSUPP; | |
3152 | if (nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
3153 | conf->flags |= VXLAN_F_L3MISS; | |
3154 | } | |
e4f67add | 3155 | |
8bcdc4f3 RP |
3156 | if (data[IFLA_VXLAN_LIMIT]) { |
3157 | if (changelink) | |
3158 | return -EOPNOTSUPP; | |
3159 | conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
3160 | } | |
d342894c | 3161 | |
8bcdc4f3 RP |
3162 | if (data[IFLA_VXLAN_COLLECT_METADATA]) { |
3163 | if (changelink) | |
3164 | return -EOPNOTSUPP; | |
3165 | if (nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA])) | |
3166 | conf->flags |= VXLAN_F_COLLECT_METADATA; | |
3167 | } | |
f8a9b1bc | 3168 | |
05f47d69 | 3169 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
8bcdc4f3 RP |
3170 | if (!changelink) { |
3171 | const struct ifla_vxlan_port_range *p | |
3172 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
3173 | conf->port_min = ntohs(p->low); | |
3174 | conf->port_max = ntohs(p->high); | |
3175 | } else { | |
3176 | return -EOPNOTSUPP; | |
3177 | } | |
05f47d69 | 3178 | } |
3179 | ||
8bcdc4f3 RP |
3180 | if (data[IFLA_VXLAN_PORT]) { |
3181 | if (changelink) | |
3182 | return -EOPNOTSUPP; | |
3183 | conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
3184 | } | |
823aa873 | 3185 | |
8bcdc4f3 RP |
3186 | if (data[IFLA_VXLAN_UDP_CSUM]) { |
3187 | if (changelink) | |
3188 | return -EOPNOTSUPP; | |
3189 | if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) | |
3190 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX; | |
3191 | } | |
359a0ea9 | 3192 | |
8bcdc4f3 RP |
3193 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) { |
3194 | if (changelink) | |
3195 | return -EOPNOTSUPP; | |
3196 | if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
3197 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; | |
3198 | } | |
359a0ea9 | 3199 | |
8bcdc4f3 RP |
3200 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) { |
3201 | if (changelink) | |
3202 | return -EOPNOTSUPP; | |
3203 | if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
3204 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; | |
3205 | } | |
359a0ea9 | 3206 | |
8bcdc4f3 RP |
3207 | if (data[IFLA_VXLAN_REMCSUM_TX]) { |
3208 | if (changelink) | |
3209 | return -EOPNOTSUPP; | |
3210 | if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
3211 | conf->flags |= VXLAN_F_REMCSUM_TX; | |
3212 | } | |
dfd8645e | 3213 | |
8bcdc4f3 RP |
3214 | if (data[IFLA_VXLAN_REMCSUM_RX]) { |
3215 | if (changelink) | |
3216 | return -EOPNOTSUPP; | |
3217 | if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
3218 | conf->flags |= VXLAN_F_REMCSUM_RX; | |
3219 | } | |
3220 | ||
3221 | if (data[IFLA_VXLAN_GBP]) { | |
3222 | if (changelink) | |
3223 | return -EOPNOTSUPP; | |
3224 | conf->flags |= VXLAN_F_GBP; | |
3225 | } | |
3226 | ||
3227 | if (data[IFLA_VXLAN_GPE]) { | |
3228 | if (changelink) | |
3229 | return -EOPNOTSUPP; | |
3230 | conf->flags |= VXLAN_F_GPE; | |
3231 | } | |
3232 | ||
3233 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) { | |
3234 | if (changelink) | |
3235 | return -EOPNOTSUPP; | |
3236 | conf->flags |= VXLAN_F_REMCSUM_NOPARTIAL; | |
3237 | } | |
3238 | ||
3239 | if (tb[IFLA_MTU]) { | |
3240 | if (changelink) | |
3241 | return -EOPNOTSUPP; | |
3242 | conf->mtu = nla_get_u32(tb[IFLA_MTU]); | |
3243 | } | |
3244 | ||
3245 | return 0; | |
3246 | } | |
3247 | ||
3248 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
3249 | struct nlattr *tb[], struct nlattr *data[]) | |
3250 | { | |
8bcdc4f3 RP |
3251 | struct vxlan_config conf; |
3252 | int err; | |
3253 | ||
3254 | err = vxlan_nl2conf(tb, data, dev, &conf, false); | |
3255 | if (err) | |
3256 | return err; | |
3257 | ||
c80498e3 | 3258 | return __vxlan_dev_create(src_net, dev, &conf); |
8bcdc4f3 | 3259 | } |
dfd8645e | 3260 | |
8bcdc4f3 RP |
3261 | static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[], |
3262 | struct nlattr *data[]) | |
3263 | { | |
3264 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3265 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3266 | struct vxlan_rdst old_dst; | |
3267 | struct vxlan_config conf; | |
3268 | int err; | |
3269 | ||
3270 | err = vxlan_nl2conf(tb, data, | |
3271 | dev, &conf, true); | |
3272 | if (err) | |
3273 | return err; | |
3511494c | 3274 | |
8bcdc4f3 | 3275 | memcpy(&old_dst, dst, sizeof(struct vxlan_rdst)); |
e1e5314d | 3276 | |
8bcdc4f3 RP |
3277 | err = vxlan_dev_configure(vxlan->net, dev, &conf, true); |
3278 | if (err) | |
3279 | return err; | |
0ace2ca8 | 3280 | |
8bcdc4f3 RP |
3281 | /* handle default dst entry */ |
3282 | if (!vxlan_addr_equal(&dst->remote_ip, &old_dst.remote_ip)) { | |
3283 | spin_lock_bh(&vxlan->hash_lock); | |
3284 | if (!vxlan_addr_any(&old_dst.remote_ip)) | |
3285 | __vxlan_fdb_delete(vxlan, all_zeros_mac, | |
3286 | old_dst.remote_ip, | |
3287 | vxlan->cfg.dst_port, | |
3288 | old_dst.remote_vni, | |
3289 | old_dst.remote_vni, | |
3290 | old_dst.remote_ifindex, 0); | |
3291 | ||
3292 | if (!vxlan_addr_any(&dst->remote_ip)) { | |
3293 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
3294 | &dst->remote_ip, | |
3295 | NUD_REACHABLE | NUD_PERMANENT, | |
3296 | NLM_F_CREATE | NLM_F_APPEND, | |
3297 | vxlan->cfg.dst_port, | |
3298 | dst->remote_vni, | |
3299 | dst->remote_vni, | |
3300 | dst->remote_ifindex, | |
3301 | NTF_SELF); | |
3302 | if (err) { | |
3303 | spin_unlock_bh(&vxlan->hash_lock); | |
3304 | return err; | |
3305 | } | |
3306 | } | |
3307 | spin_unlock_bh(&vxlan->hash_lock); | |
3308 | } | |
ce577668 | 3309 | |
8bcdc4f3 | 3310 | return 0; |
d342894c | 3311 | } |
3312 | ||
3313 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
3314 | { | |
3315 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3316 | ||
8b3f9337 RP |
3317 | vxlan_flush(vxlan, true); |
3318 | ||
58ce31cc | 3319 | gro_cells_destroy(&vxlan->gro_cells); |
553675fb | 3320 | list_del(&vxlan->next); |
d342894c | 3321 | unregister_netdevice_queue(dev, head); |
3322 | } | |
3323 | ||
3324 | static size_t vxlan_get_size(const struct net_device *dev) | |
3325 | { | |
3326 | ||
3327 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 3328 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 3329 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 3330 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 3331 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
3332 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
e7f70af1 | 3333 | nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */ |
d342894c | 3334 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ |
e4f67add DS |
3335 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
3336 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
3337 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
3338 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
da8b43c0 | 3339 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
d342894c | 3340 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
3341 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 3342 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
3343 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
3344 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
3345 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
3346 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
3347 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
3348 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 3349 | 0; |
3350 | } | |
3351 | ||
3352 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
3353 | { | |
3354 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 3355 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 3356 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
3357 | .low = htons(vxlan->cfg.port_min), |
3358 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 3359 | }; |
d342894c | 3360 | |
54bfd872 | 3361 | if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni))) |
d342894c | 3362 | goto nla_put_failure; |
3363 | ||
e4c7ed41 CW |
3364 | if (!vxlan_addr_any(&dst->remote_ip)) { |
3365 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
3366 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
3367 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
3368 | goto nla_put_failure; |
3369 | #if IS_ENABLED(CONFIG_IPV6) | |
3370 | } else { | |
930345ea JB |
3371 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
3372 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
3373 | goto nla_put_failure; |
3374 | #endif | |
3375 | } | |
3376 | } | |
d342894c | 3377 | |
c7995c43 | 3378 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 3379 | goto nla_put_failure; |
3380 | ||
0dfbdf41 TG |
3381 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
3382 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 3383 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 3384 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
3385 | goto nla_put_failure; |
3386 | #if IS_ENABLED(CONFIG_IPV6) | |
3387 | } else { | |
930345ea | 3388 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 3389 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
3390 | goto nla_put_failure; |
3391 | #endif | |
3392 | } | |
3393 | } | |
d342894c | 3394 | |
0dfbdf41 TG |
3395 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
3396 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || | |
e7f70af1 | 3397 | nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) || |
e4f67add DS |
3398 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
3399 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
3400 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
3401 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
3402 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
3403 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
3404 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
3405 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
3406 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
da8b43c0 AS |
3407 | nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
3408 | !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) || | |
0dfbdf41 TG |
3409 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
3410 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
3411 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 | 3412 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
6ceb31ca | 3413 | !(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM_TX)) || |
359a0ea9 TH |
3414 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
3415 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
3416 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
dfd8645e TH |
3417 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
3418 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, | |
3419 | !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) || | |
3420 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, | |
3421 | !!(vxlan->flags & VXLAN_F_REMCSUM_RX))) | |
d342894c | 3422 | goto nla_put_failure; |
3423 | ||
05f47d69 | 3424 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
3425 | goto nla_put_failure; | |
3426 | ||
3511494c TG |
3427 | if (vxlan->flags & VXLAN_F_GBP && |
3428 | nla_put_flag(skb, IFLA_VXLAN_GBP)) | |
3429 | goto nla_put_failure; | |
3430 | ||
e1e5314d JB |
3431 | if (vxlan->flags & VXLAN_F_GPE && |
3432 | nla_put_flag(skb, IFLA_VXLAN_GPE)) | |
3433 | goto nla_put_failure; | |
3434 | ||
0ace2ca8 TH |
3435 | if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL && |
3436 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) | |
3437 | goto nla_put_failure; | |
3438 | ||
d342894c | 3439 | return 0; |
3440 | ||
3441 | nla_put_failure: | |
3442 | return -EMSGSIZE; | |
3443 | } | |
3444 | ||
1728d4fa ND |
3445 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
3446 | { | |
3447 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3448 | ||
3449 | return vxlan->net; | |
3450 | } | |
3451 | ||
d342894c | 3452 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
3453 | .kind = "vxlan", | |
3454 | .maxtype = IFLA_VXLAN_MAX, | |
3455 | .policy = vxlan_policy, | |
3456 | .priv_size = sizeof(struct vxlan_dev), | |
3457 | .setup = vxlan_setup, | |
3458 | .validate = vxlan_validate, | |
3459 | .newlink = vxlan_newlink, | |
8bcdc4f3 | 3460 | .changelink = vxlan_changelink, |
d342894c | 3461 | .dellink = vxlan_dellink, |
3462 | .get_size = vxlan_get_size, | |
3463 | .fill_info = vxlan_fill_info, | |
1728d4fa | 3464 | .get_link_net = vxlan_get_link_net, |
d342894c | 3465 | }; |
3466 | ||
cf5da330 ND |
3467 | struct net_device *vxlan_dev_create(struct net *net, const char *name, |
3468 | u8 name_assign_type, | |
3469 | struct vxlan_config *conf) | |
3470 | { | |
3471 | struct nlattr *tb[IFLA_MAX + 1]; | |
3472 | struct net_device *dev; | |
3473 | int err; | |
3474 | ||
3475 | memset(&tb, 0, sizeof(tb)); | |
3476 | ||
3477 | dev = rtnl_create_link(net, name, name_assign_type, | |
3478 | &vxlan_link_ops, tb); | |
3479 | if (IS_ERR(dev)) | |
3480 | return dev; | |
3481 | ||
c80498e3 | 3482 | err = __vxlan_dev_create(net, dev, conf); |
cf5da330 ND |
3483 | if (err < 0) { |
3484 | free_netdev(dev); | |
3485 | return ERR_PTR(err); | |
3486 | } | |
3487 | ||
3488 | err = rtnl_configure_link(dev, NULL); | |
3489 | if (err < 0) { | |
3490 | LIST_HEAD(list_kill); | |
3491 | ||
3492 | vxlan_dellink(dev, &list_kill); | |
3493 | unregister_netdevice_many(&list_kill); | |
3494 | return ERR_PTR(err); | |
3495 | } | |
3496 | ||
3497 | return dev; | |
3498 | } | |
3499 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
3500 | ||
acaf4e70 DB |
3501 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
3502 | struct net_device *dev) | |
3503 | { | |
3504 | struct vxlan_dev *vxlan, *next; | |
3505 | LIST_HEAD(list_kill); | |
3506 | ||
3507 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3508 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3509 | ||
3510 | /* In case we created vxlan device with carrier | |
3511 | * and we loose the carrier due to module unload | |
3512 | * we also need to remove vxlan device. In other | |
3513 | * cases, it's not necessary and remote_ifindex | |
3514 | * is 0 here, so no matches. | |
3515 | */ | |
3516 | if (dst->remote_ifindex == dev->ifindex) | |
3517 | vxlan_dellink(vxlan->dev, &list_kill); | |
3518 | } | |
3519 | ||
3520 | unregister_netdevice_many(&list_kill); | |
3521 | } | |
3522 | ||
b7aade15 HFS |
3523 | static int vxlan_netdevice_event(struct notifier_block *unused, |
3524 | unsigned long event, void *ptr) | |
acaf4e70 DB |
3525 | { |
3526 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 3527 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 3528 | |
783c1463 | 3529 | if (event == NETDEV_UNREGISTER) |
acaf4e70 | 3530 | vxlan_handle_lowerdev_unregister(vn, dev); |
7c46a640 | 3531 | else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO) |
b7aade15 | 3532 | vxlan_push_rx_ports(dev); |
acaf4e70 DB |
3533 | |
3534 | return NOTIFY_DONE; | |
3535 | } | |
3536 | ||
3537 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
b7aade15 | 3538 | .notifier_call = vxlan_netdevice_event, |
acaf4e70 DB |
3539 | }; |
3540 | ||
d342894c | 3541 | static __net_init int vxlan_init_net(struct net *net) |
3542 | { | |
3543 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 3544 | unsigned int h; |
d342894c | 3545 | |
553675fb | 3546 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 3547 | spin_lock_init(&vn->sock_lock); |
d342894c | 3548 | |
553675fb | 3549 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
3550 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 3551 | |
3552 | return 0; | |
3553 | } | |
3554 | ||
f01ec1c0 ND |
3555 | static void __net_exit vxlan_exit_net(struct net *net) |
3556 | { | |
3557 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3558 | struct vxlan_dev *vxlan, *next; | |
3559 | struct net_device *dev, *aux; | |
3560 | LIST_HEAD(list); | |
3561 | ||
3562 | rtnl_lock(); | |
3563 | for_each_netdev_safe(net, dev, aux) | |
3564 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
3565 | unregister_netdevice_queue(dev, &list); | |
3566 | ||
3567 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3568 | /* If vxlan->dev is in the same netns, it has already been added | |
3569 | * to the list by the previous loop. | |
3570 | */ | |
58ce31cc TH |
3571 | if (!net_eq(dev_net(vxlan->dev), net)) { |
3572 | gro_cells_destroy(&vxlan->gro_cells); | |
13c3ed6a | 3573 | unregister_netdevice_queue(vxlan->dev, &list); |
58ce31cc | 3574 | } |
f01ec1c0 ND |
3575 | } |
3576 | ||
3577 | unregister_netdevice_many(&list); | |
3578 | rtnl_unlock(); | |
3579 | } | |
3580 | ||
d342894c | 3581 | static struct pernet_operations vxlan_net_ops = { |
3582 | .init = vxlan_init_net, | |
f01ec1c0 | 3583 | .exit = vxlan_exit_net, |
d342894c | 3584 | .id = &vxlan_net_id, |
3585 | .size = sizeof(struct vxlan_net), | |
3586 | }; | |
3587 | ||
3588 | static int __init vxlan_init_module(void) | |
3589 | { | |
3590 | int rc; | |
3591 | ||
3592 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); | |
3593 | ||
783c1463 | 3594 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 3595 | if (rc) |
3596 | goto out1; | |
3597 | ||
acaf4e70 | 3598 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 3599 | if (rc) |
3600 | goto out2; | |
3601 | ||
acaf4e70 DB |
3602 | rc = rtnl_link_register(&vxlan_link_ops); |
3603 | if (rc) | |
3604 | goto out3; | |
d342894c | 3605 | |
acaf4e70 DB |
3606 | return 0; |
3607 | out3: | |
3608 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 3609 | out2: |
783c1463 | 3610 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 3611 | out1: |
3612 | return rc; | |
3613 | } | |
7332a13b | 3614 | late_initcall(vxlan_init_module); |
d342894c | 3615 | |
3616 | static void __exit vxlan_cleanup_module(void) | |
3617 | { | |
b7153984 | 3618 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 3619 | unregister_netdevice_notifier(&vxlan_notifier_block); |
783c1463 DB |
3620 | unregister_pernet_subsys(&vxlan_net_ops); |
3621 | /* rcu_barrier() is called by netns */ | |
d342894c | 3622 | } |
3623 | module_exit(vxlan_cleanup_module); | |
3624 | ||
3625 | MODULE_LICENSE("GPL"); | |
3626 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 3627 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 3628 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 3629 | MODULE_ALIAS_RTNL_LINK("vxlan"); |