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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 | |
553675fb | 62 | /* per-network namespace private data for this module */ |
63 | struct vxlan_net { | |
64 | struct list_head vxlan_list; | |
65 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 66 | spinlock_t sock_lock; |
553675fb | 67 | }; |
68 | ||
d342894c | 69 | /* Forwarding table entry */ |
70 | struct vxlan_fdb { | |
71 | struct hlist_node hlist; /* linked list of entries */ | |
72 | struct rcu_head rcu; | |
73 | unsigned long updated; /* jiffies */ | |
74 | unsigned long used; | |
3e61aa8f | 75 | struct list_head remotes; |
7177a3b0 | 76 | u8 eth_addr[ETH_ALEN]; |
d342894c | 77 | u16 state; /* see ndm_state */ |
3ad7a4b1 | 78 | __be32 vni; |
ae884082 | 79 | u8 flags; /* see ndm_flags */ |
d342894c | 80 | }; |
81 | ||
d342894c | 82 | /* salt for hash table */ |
83 | static u32 vxlan_salt __read_mostly; | |
84 | ||
ee122c79 TG |
85 | static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
86 | { | |
e7030878 TG |
87 | return vs->flags & VXLAN_F_COLLECT_METADATA || |
88 | ip_tunnel_collect_metadata(); | |
ee122c79 TG |
89 | } |
90 | ||
e4c7ed41 CW |
91 | #if IS_ENABLED(CONFIG_IPV6) |
92 | static inline | |
93 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
94 | { | |
f0ef3126 JB |
95 | if (a->sa.sa_family != b->sa.sa_family) |
96 | return false; | |
97 | if (a->sa.sa_family == AF_INET6) | |
98 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
99 | else | |
100 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
e4c7ed41 CW |
101 | } |
102 | ||
103 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
104 | { | |
f0ef3126 JB |
105 | if (ipa->sa.sa_family == AF_INET6) |
106 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
107 | else | |
108 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
e4c7ed41 CW |
109 | } |
110 | ||
111 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
112 | { | |
f0ef3126 JB |
113 | if (ipa->sa.sa_family == AF_INET6) |
114 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
115 | else | |
116 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); | |
e4c7ed41 CW |
117 | } |
118 | ||
119 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
120 | { | |
f0ef3126 | 121 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
67b61f6c | 122 | ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
f0ef3126 JB |
123 | ip->sa.sa_family = AF_INET6; |
124 | return 0; | |
125 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 126 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
127 | ip->sa.sa_family = AF_INET; |
128 | return 0; | |
129 | } else { | |
130 | return -EAFNOSUPPORT; | |
131 | } | |
e4c7ed41 CW |
132 | } |
133 | ||
134 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 135 | const union vxlan_addr *ip) |
e4c7ed41 | 136 | { |
f0ef3126 | 137 | if (ip->sa.sa_family == AF_INET6) |
930345ea | 138 | return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
f0ef3126 | 139 | else |
930345ea | 140 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
141 | } |
142 | ||
143 | #else /* !CONFIG_IPV6 */ | |
144 | ||
145 | static inline | |
146 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
147 | { | |
f0ef3126 | 148 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
e4c7ed41 CW |
149 | } |
150 | ||
151 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
152 | { | |
f0ef3126 | 153 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); |
e4c7ed41 CW |
154 | } |
155 | ||
156 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
157 | { | |
f0ef3126 | 158 | return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr)); |
e4c7ed41 CW |
159 | } |
160 | ||
161 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) | |
162 | { | |
f0ef3126 JB |
163 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
164 | return -EAFNOSUPPORT; | |
165 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 166 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
167 | ip->sa.sa_family = AF_INET; |
168 | return 0; | |
169 | } else { | |
170 | return -EAFNOSUPPORT; | |
171 | } | |
e4c7ed41 CW |
172 | } |
173 | ||
174 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 175 | const union vxlan_addr *ip) |
e4c7ed41 | 176 | { |
930345ea | 177 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
178 | } |
179 | #endif | |
180 | ||
553675fb | 181 | /* Virtual Network hash table head */ |
54bfd872 | 182 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni) |
553675fb | 183 | { |
54bfd872 | 184 | return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)]; |
553675fb | 185 | } |
186 | ||
187 | /* Socket hash table head */ | |
188 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 189 | { |
190 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
191 | ||
553675fb | 192 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
193 | } | |
194 | ||
3e61aa8f SH |
195 | /* First remote destination for a forwarding entry. |
196 | * Guaranteed to be non-NULL because remotes are never deleted. | |
197 | */ | |
5ca5461c | 198 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 199 | { |
5ca5461c | 200 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
201 | } | |
202 | ||
203 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
204 | { | |
205 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
206 | } |
207 | ||
ac5132d1 TG |
208 | /* Find VXLAN socket based on network namespace, address family and UDP port |
209 | * and enabled unshareable flags. | |
210 | */ | |
211 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
212 | __be16 port, u32 flags) | |
553675fb | 213 | { |
214 | struct vxlan_sock *vs; | |
af33c1ad TH |
215 | |
216 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 217 | |
218 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 219 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
705cc62f | 220 | vxlan_get_sk_family(vs) == family && |
af33c1ad | 221 | vs->flags == flags) |
553675fb | 222 | return vs; |
223 | } | |
224 | return NULL; | |
d342894c | 225 | } |
226 | ||
54bfd872 | 227 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, __be32 vni) |
d342894c | 228 | { |
229 | struct vxlan_dev *vxlan; | |
d342894c | 230 | |
b9167b2e JB |
231 | /* For flow based devices, map all packets to VNI 0 */ |
232 | if (vs->flags & VXLAN_F_COLLECT_METADATA) | |
233 | vni = 0; | |
234 | ||
54bfd872 JB |
235 | hlist_for_each_entry_rcu(vxlan, vni_head(vs, vni), hlist) { |
236 | if (vxlan->default_dst.remote_vni == vni) | |
d342894c | 237 | return vxlan; |
238 | } | |
239 | ||
240 | return NULL; | |
241 | } | |
242 | ||
5cfccc5a | 243 | /* Look up VNI in a per net namespace table */ |
54bfd872 | 244 | static struct vxlan_dev *vxlan_find_vni(struct net *net, __be32 vni, |
ac5132d1 TG |
245 | sa_family_t family, __be16 port, |
246 | u32 flags) | |
5cfccc5a PS |
247 | { |
248 | struct vxlan_sock *vs; | |
249 | ||
ac5132d1 | 250 | vs = vxlan_find_sock(net, family, port, flags); |
5cfccc5a PS |
251 | if (!vs) |
252 | return NULL; | |
253 | ||
54bfd872 | 254 | return vxlan_vs_find_vni(vs, vni); |
5cfccc5a PS |
255 | } |
256 | ||
d342894c | 257 | /* Fill in neighbour message in skbuff. */ |
258 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
259 | const struct vxlan_fdb *fdb, |
260 | u32 portid, u32 seq, int type, unsigned int flags, | |
261 | const struct vxlan_rdst *rdst) | |
d342894c | 262 | { |
263 | unsigned long now = jiffies; | |
264 | struct nda_cacheinfo ci; | |
265 | struct nlmsghdr *nlh; | |
266 | struct ndmsg *ndm; | |
e4f67add | 267 | bool send_ip, send_eth; |
d342894c | 268 | |
269 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
270 | if (nlh == NULL) | |
271 | return -EMSGSIZE; | |
272 | ||
273 | ndm = nlmsg_data(nlh); | |
274 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
275 | |
276 | send_eth = send_ip = true; | |
277 | ||
278 | if (type == RTM_GETNEIGH) { | |
279 | ndm->ndm_family = AF_INET; | |
e4c7ed41 | 280 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add DS |
281 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
282 | } else | |
283 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 284 | ndm->ndm_state = fdb->state; |
285 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 286 | ndm->ndm_flags = fdb->flags; |
545469f7 | 287 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 288 | |
193523bf | 289 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 290 | nla_put_s32(skb, NDA_LINK_NETNSID, |
38f507f1 | 291 | peernet2id(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
292 | goto nla_put_failure; |
293 | ||
e4f67add | 294 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 295 | goto nla_put_failure; |
296 | ||
e4c7ed41 | 297 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
298 | goto nla_put_failure; |
299 | ||
0dfbdf41 | 300 | if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && |
6681712d DS |
301 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
302 | goto nla_put_failure; | |
c7995c43 | 303 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
54bfd872 | 304 | nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni))) |
6681712d | 305 | goto nla_put_failure; |
3ad7a4b1 RP |
306 | if ((vxlan->flags & VXLAN_F_COLLECT_METADATA) && fdb->vni && |
307 | nla_put_u32(skb, NDA_SRC_VNI, | |
308 | be32_to_cpu(fdb->vni))) | |
309 | goto nla_put_failure; | |
6681712d DS |
310 | if (rdst->remote_ifindex && |
311 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 312 | goto nla_put_failure; |
313 | ||
314 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
315 | ci.ndm_confirmed = 0; | |
316 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
317 | ci.ndm_refcnt = 0; | |
318 | ||
319 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
320 | goto nla_put_failure; | |
321 | ||
053c095a JB |
322 | nlmsg_end(skb, nlh); |
323 | return 0; | |
d342894c | 324 | |
325 | nla_put_failure: | |
326 | nlmsg_cancel(skb, nlh); | |
327 | return -EMSGSIZE; | |
328 | } | |
329 | ||
330 | static inline size_t vxlan_nlmsg_size(void) | |
331 | { | |
332 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
333 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 334 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 335 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
336 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
337 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 338 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 339 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
340 | } | |
341 | ||
9e4b93f9 ND |
342 | static void vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
343 | struct vxlan_rdst *rd, int type) | |
d342894c | 344 | { |
345 | struct net *net = dev_net(vxlan->dev); | |
346 | struct sk_buff *skb; | |
347 | int err = -ENOBUFS; | |
348 | ||
349 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
350 | if (skb == NULL) | |
351 | goto errout; | |
352 | ||
9e4b93f9 | 353 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 354 | if (err < 0) { |
355 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
356 | WARN_ON(err == -EMSGSIZE); | |
357 | kfree_skb(skb); | |
358 | goto errout; | |
359 | } | |
360 | ||
361 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
362 | return; | |
363 | errout: | |
364 | if (err < 0) | |
365 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
366 | } | |
367 | ||
e4c7ed41 | 368 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
369 | { |
370 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
371 | struct vxlan_fdb f = { |
372 | .state = NUD_STALE, | |
373 | }; | |
374 | struct vxlan_rdst remote = { | |
e4c7ed41 | 375 | .remote_ip = *ipa, /* goes to NDA_DST */ |
54bfd872 | 376 | .remote_vni = cpu_to_be32(VXLAN_N_VID), |
bb3fd687 | 377 | }; |
3e61aa8f | 378 | |
9e4b93f9 | 379 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
380 | } |
381 | ||
382 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
383 | { | |
bb3fd687 SH |
384 | struct vxlan_fdb f = { |
385 | .state = NUD_STALE, | |
386 | }; | |
9e4b93f9 | 387 | struct vxlan_rdst remote = { }; |
e4f67add | 388 | |
e4f67add DS |
389 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
390 | ||
9e4b93f9 | 391 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH); |
e4f67add DS |
392 | } |
393 | ||
d342894c | 394 | /* Hash Ethernet address */ |
395 | static u32 eth_hash(const unsigned char *addr) | |
396 | { | |
397 | u64 value = get_unaligned((u64 *)addr); | |
398 | ||
399 | /* only want 6 bytes */ | |
400 | #ifdef __BIG_ENDIAN | |
d342894c | 401 | value >>= 16; |
321fb991 | 402 | #else |
403 | value <<= 16; | |
d342894c | 404 | #endif |
405 | return hash_64(value, FDB_HASH_BITS); | |
406 | } | |
407 | ||
3ad7a4b1 RP |
408 | static u32 eth_vni_hash(const unsigned char *addr, __be32 vni) |
409 | { | |
410 | /* use 1 byte of OUI and 3 bytes of NIC */ | |
411 | u32 key = get_unaligned((u32 *)(addr + 2)); | |
412 | ||
413 | return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1); | |
414 | } | |
415 | ||
d342894c | 416 | /* Hash chain to use given mac address */ |
417 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
3ad7a4b1 | 418 | const u8 *mac, __be32 vni) |
d342894c | 419 | { |
3ad7a4b1 RP |
420 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA) |
421 | return &vxlan->fdb_head[eth_vni_hash(mac, vni)]; | |
422 | else | |
423 | return &vxlan->fdb_head[eth_hash(mac)]; | |
d342894c | 424 | } |
425 | ||
426 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 427 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 428 | const u8 *mac, __be32 vni) |
d342894c | 429 | { |
3ad7a4b1 | 430 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni); |
d342894c | 431 | struct vxlan_fdb *f; |
d342894c | 432 | |
b67bfe0d | 433 | hlist_for_each_entry_rcu(f, head, hlist) { |
3ad7a4b1 RP |
434 | if (ether_addr_equal(mac, f->eth_addr)) { |
435 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA) { | |
436 | if (vni == f->vni) | |
437 | return f; | |
438 | } else { | |
439 | return f; | |
440 | } | |
441 | } | |
d342894c | 442 | } |
443 | ||
444 | return NULL; | |
445 | } | |
446 | ||
014be2c8 | 447 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 448 | const u8 *mac, __be32 vni) |
014be2c8 SS |
449 | { |
450 | struct vxlan_fdb *f; | |
451 | ||
3ad7a4b1 | 452 | f = __vxlan_find_mac(vxlan, mac, vni); |
014be2c8 SS |
453 | if (f) |
454 | f->used = jiffies; | |
455 | ||
456 | return f; | |
457 | } | |
458 | ||
a5e7c10a MR |
459 | /* caller should hold vxlan->hash_lock */ |
460 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 461 | union vxlan_addr *ip, __be16 port, |
54bfd872 | 462 | __be32 vni, __u32 ifindex) |
6681712d | 463 | { |
3e61aa8f | 464 | struct vxlan_rdst *rd; |
6681712d | 465 | |
3e61aa8f | 466 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 467 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
468 | rd->remote_port == port && |
469 | rd->remote_vni == vni && | |
470 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 471 | return rd; |
6681712d | 472 | } |
3e61aa8f | 473 | |
a5e7c10a MR |
474 | return NULL; |
475 | } | |
476 | ||
906dc186 TR |
477 | /* Replace destination of unicast mac */ |
478 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
54bfd872 JB |
479 | union vxlan_addr *ip, __be16 port, __be32 vni, |
480 | __u32 ifindex) | |
906dc186 TR |
481 | { |
482 | struct vxlan_rdst *rd; | |
483 | ||
484 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
485 | if (rd) | |
486 | return 0; | |
487 | ||
488 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
489 | if (!rd) | |
490 | return 0; | |
0c1d70af PA |
491 | |
492 | dst_cache_reset(&rd->dst_cache); | |
e4c7ed41 | 493 | rd->remote_ip = *ip; |
906dc186 TR |
494 | rd->remote_port = port; |
495 | rd->remote_vni = vni; | |
496 | rd->remote_ifindex = ifindex; | |
497 | return 1; | |
498 | } | |
499 | ||
a5e7c10a MR |
500 | /* Add/update destinations for multicast */ |
501 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
54bfd872 | 502 | union vxlan_addr *ip, __be16 port, __be32 vni, |
9e4b93f9 | 503 | __u32 ifindex, struct vxlan_rdst **rdp) |
a5e7c10a MR |
504 | { |
505 | struct vxlan_rdst *rd; | |
506 | ||
507 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
508 | if (rd) | |
509 | return 0; | |
510 | ||
6681712d DS |
511 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
512 | if (rd == NULL) | |
513 | return -ENOBUFS; | |
0c1d70af PA |
514 | |
515 | if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) { | |
516 | kfree(rd); | |
517 | return -ENOBUFS; | |
518 | } | |
519 | ||
e4c7ed41 | 520 | rd->remote_ip = *ip; |
6681712d DS |
521 | rd->remote_port = port; |
522 | rd->remote_vni = vni; | |
523 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
524 | |
525 | list_add_tail_rcu(&rd->list, &f->remotes); | |
526 | ||
9e4b93f9 | 527 | *rdp = rd; |
6681712d DS |
528 | return 1; |
529 | } | |
530 | ||
dfd8645e TH |
531 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
532 | unsigned int off, | |
533 | struct vxlanhdr *vh, size_t hdrlen, | |
54bfd872 JB |
534 | __be32 vni_field, |
535 | struct gro_remcsum *grc, | |
0ace2ca8 | 536 | bool nopartial) |
dfd8645e | 537 | { |
b7fe10e5 | 538 | size_t start, offset; |
dfd8645e TH |
539 | |
540 | if (skb->remcsum_offload) | |
b7fe10e5 | 541 | return vh; |
dfd8645e TH |
542 | |
543 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
544 | return NULL; | |
545 | ||
54bfd872 JB |
546 | start = vxlan_rco_start(vni_field); |
547 | offset = start + vxlan_rco_offset(vni_field); | |
dfd8645e | 548 | |
b7fe10e5 TH |
549 | vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
550 | start, offset, grc, nopartial); | |
dfd8645e TH |
551 | |
552 | skb->remcsum_offload = 1; | |
553 | ||
554 | return vh; | |
555 | } | |
556 | ||
5602c48c TH |
557 | static struct sk_buff **vxlan_gro_receive(struct sock *sk, |
558 | struct sk_buff **head, | |
559 | struct sk_buff *skb) | |
dc01e7d3 OG |
560 | { |
561 | struct sk_buff *p, **pp = NULL; | |
562 | struct vxlanhdr *vh, *vh2; | |
9b174d88 | 563 | unsigned int hlen, off_vx; |
dc01e7d3 | 564 | int flush = 1; |
5602c48c | 565 | struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk); |
54bfd872 | 566 | __be32 flags; |
26c4f7da TH |
567 | struct gro_remcsum grc; |
568 | ||
569 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
570 | |
571 | off_vx = skb_gro_offset(skb); | |
572 | hlen = off_vx + sizeof(*vh); | |
573 | vh = skb_gro_header_fast(skb, off_vx); | |
574 | if (skb_gro_header_hard(skb, hlen)) { | |
575 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
576 | if (unlikely(!vh)) | |
577 | goto out; | |
578 | } | |
dc01e7d3 | 579 | |
dfd8645e TH |
580 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
581 | ||
54bfd872 | 582 | flags = vh->vx_flags; |
dfd8645e TH |
583 | |
584 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
585 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
54bfd872 | 586 | vh->vx_vni, &grc, |
0ace2ca8 TH |
587 | !!(vs->flags & |
588 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
589 | |
590 | if (!vh) | |
591 | goto out; | |
592 | } | |
593 | ||
b7fe10e5 TH |
594 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
595 | ||
dc01e7d3 OG |
596 | for (p = *head; p; p = p->next) { |
597 | if (!NAPI_GRO_CB(p)->same_flow) | |
598 | continue; | |
599 | ||
600 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
601 | if (vh->vx_flags != vh2->vx_flags || |
602 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
603 | NAPI_GRO_CB(p)->same_flow = 0; |
604 | continue; | |
605 | } | |
dc01e7d3 OG |
606 | } |
607 | ||
fcd91dd4 | 608 | pp = call_gro_receive(eth_gro_receive, head, skb); |
c194cf93 | 609 | flush = 0; |
dc01e7d3 | 610 | |
dc01e7d3 | 611 | out: |
26c4f7da | 612 | skb_gro_remcsum_cleanup(skb, &grc); |
dc01e7d3 OG |
613 | NAPI_GRO_CB(skb)->flush |= flush; |
614 | ||
615 | return pp; | |
616 | } | |
617 | ||
5602c48c | 618 | static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff) |
dc01e7d3 | 619 | { |
229740c6 JR |
620 | /* Sets 'skb->inner_mac_header' since we are always called with |
621 | * 'skb->encapsulation' set. | |
622 | */ | |
9b174d88 | 623 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
624 | } |
625 | ||
d342894c | 626 | /* Add new entry to forwarding table -- assumes lock held */ |
627 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, | |
e4c7ed41 | 628 | const u8 *mac, union vxlan_addr *ip, |
6681712d | 629 | __u16 state, __u16 flags, |
3ad7a4b1 RP |
630 | __be16 port, __be32 src_vni, __be32 vni, |
631 | __u32 ifindex, __u8 ndm_flags) | |
d342894c | 632 | { |
9e4b93f9 | 633 | struct vxlan_rdst *rd = NULL; |
d342894c | 634 | struct vxlan_fdb *f; |
635 | int notify = 0; | |
17b46365 | 636 | int rc; |
d342894c | 637 | |
3ad7a4b1 | 638 | f = __vxlan_find_mac(vxlan, mac, src_vni); |
d342894c | 639 | if (f) { |
640 | if (flags & NLM_F_EXCL) { | |
641 | netdev_dbg(vxlan->dev, | |
642 | "lost race to create %pM\n", mac); | |
643 | return -EEXIST; | |
644 | } | |
645 | if (f->state != state) { | |
646 | f->state = state; | |
647 | f->updated = jiffies; | |
648 | notify = 1; | |
649 | } | |
ae884082 DS |
650 | if (f->flags != ndm_flags) { |
651 | f->flags = ndm_flags; | |
652 | f->updated = jiffies; | |
653 | notify = 1; | |
654 | } | |
906dc186 TR |
655 | if ((flags & NLM_F_REPLACE)) { |
656 | /* Only change unicasts */ | |
657 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
658 | is_zero_ether_addr(f->eth_addr))) { | |
60840429 | 659 | notify |= vxlan_fdb_replace(f, ip, port, vni, |
906dc186 | 660 | ifindex); |
906dc186 TR |
661 | } else |
662 | return -EOPNOTSUPP; | |
663 | } | |
6681712d | 664 | if ((flags & NLM_F_APPEND) && |
58e4c767 MR |
665 | (is_multicast_ether_addr(f->eth_addr) || |
666 | is_zero_ether_addr(f->eth_addr))) { | |
17b46365 | 667 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
6681712d DS |
668 | |
669 | if (rc < 0) | |
670 | return rc; | |
671 | notify |= rc; | |
672 | } | |
d342894c | 673 | } else { |
674 | if (!(flags & NLM_F_CREATE)) | |
675 | return -ENOENT; | |
676 | ||
0dfbdf41 TG |
677 | if (vxlan->cfg.addrmax && |
678 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
d342894c | 679 | return -ENOSPC; |
680 | ||
906dc186 TR |
681 | /* Disallow replace to add a multicast entry */ |
682 | if ((flags & NLM_F_REPLACE) && | |
683 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
684 | return -EOPNOTSUPP; | |
685 | ||
e4c7ed41 | 686 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); |
d342894c | 687 | f = kmalloc(sizeof(*f), GFP_ATOMIC); |
688 | if (!f) | |
689 | return -ENOMEM; | |
690 | ||
691 | notify = 1; | |
d342894c | 692 | f->state = state; |
ae884082 | 693 | f->flags = ndm_flags; |
d342894c | 694 | f->updated = f->used = jiffies; |
3ad7a4b1 | 695 | f->vni = src_vni; |
3e61aa8f | 696 | INIT_LIST_HEAD(&f->remotes); |
d342894c | 697 | memcpy(f->eth_addr, mac, ETH_ALEN); |
698 | ||
17b46365 HY |
699 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); |
700 | if (rc < 0) { | |
701 | kfree(f); | |
702 | return rc; | |
703 | } | |
3e61aa8f | 704 | |
d342894c | 705 | ++vxlan->addrcnt; |
706 | hlist_add_head_rcu(&f->hlist, | |
3ad7a4b1 | 707 | vxlan_fdb_head(vxlan, mac, src_vni)); |
d342894c | 708 | } |
709 | ||
9e4b93f9 ND |
710 | if (notify) { |
711 | if (rd == NULL) | |
712 | rd = first_remote_rtnl(f); | |
713 | vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH); | |
714 | } | |
d342894c | 715 | |
716 | return 0; | |
717 | } | |
718 | ||
6706c82e | 719 | static void vxlan_fdb_free(struct rcu_head *head) |
6681712d DS |
720 | { |
721 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
3e61aa8f | 722 | struct vxlan_rdst *rd, *nd; |
6681712d | 723 | |
0c1d70af PA |
724 | list_for_each_entry_safe(rd, nd, &f->remotes, list) { |
725 | dst_cache_destroy(&rd->dst_cache); | |
6681712d | 726 | kfree(rd); |
0c1d70af | 727 | } |
6681712d DS |
728 | kfree(f); |
729 | } | |
730 | ||
d342894c | 731 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f) |
732 | { | |
733 | netdev_dbg(vxlan->dev, | |
734 | "delete %pM\n", f->eth_addr); | |
735 | ||
736 | --vxlan->addrcnt; | |
9e4b93f9 | 737 | vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_DELNEIGH); |
d342894c | 738 | |
739 | hlist_del_rcu(&f->hlist); | |
6681712d | 740 | call_rcu(&f->rcu, vxlan_fdb_free); |
d342894c | 741 | } |
742 | ||
f0b074be | 743 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
3ad7a4b1 RP |
744 | union vxlan_addr *ip, __be16 *port, __be32 *src_vni, |
745 | __be32 *vni, u32 *ifindex) | |
d342894c | 746 | { |
6681712d | 747 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 748 | int err; |
d342894c | 749 | |
f0b074be | 750 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
751 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
752 | if (err) | |
753 | return err; | |
f0b074be | 754 | } else { |
e4c7ed41 CW |
755 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
756 | if (remote->sa.sa_family == AF_INET) { | |
757 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
758 | ip->sa.sa_family = AF_INET; | |
759 | #if IS_ENABLED(CONFIG_IPV6) | |
760 | } else { | |
761 | ip->sin6.sin6_addr = in6addr_any; | |
762 | ip->sa.sa_family = AF_INET6; | |
763 | #endif | |
764 | } | |
f0b074be | 765 | } |
d342894c | 766 | |
6681712d | 767 | if (tb[NDA_PORT]) { |
73cf3317 | 768 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 769 | return -EINVAL; |
f0b074be MR |
770 | *port = nla_get_be16(tb[NDA_PORT]); |
771 | } else { | |
0dfbdf41 | 772 | *port = vxlan->cfg.dst_port; |
f0b074be | 773 | } |
6681712d DS |
774 | |
775 | if (tb[NDA_VNI]) { | |
776 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
777 | return -EINVAL; | |
54bfd872 | 778 | *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); |
f0b074be MR |
779 | } else { |
780 | *vni = vxlan->default_dst.remote_vni; | |
781 | } | |
6681712d | 782 | |
3ad7a4b1 RP |
783 | if (tb[NDA_SRC_VNI]) { |
784 | if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32)) | |
785 | return -EINVAL; | |
786 | *src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI])); | |
787 | } else { | |
788 | *src_vni = vxlan->default_dst.remote_vni; | |
789 | } | |
790 | ||
6681712d | 791 | if (tb[NDA_IFINDEX]) { |
5abb0029 | 792 | struct net_device *tdev; |
6681712d DS |
793 | |
794 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
795 | return -EINVAL; | |
f0b074be | 796 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 797 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 798 | if (!tdev) |
6681712d | 799 | return -EADDRNOTAVAIL; |
f0b074be MR |
800 | } else { |
801 | *ifindex = 0; | |
802 | } | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | /* Add static entry (via netlink) */ | |
808 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
809 | struct net_device *dev, | |
f6f6424b | 810 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
811 | { |
812 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
813 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 814 | union vxlan_addr ip; |
f0b074be | 815 | __be16 port; |
3ad7a4b1 | 816 | __be32 src_vni, vni; |
54bfd872 | 817 | u32 ifindex; |
f0b074be MR |
818 | int err; |
819 | ||
820 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
821 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
822 | ndm->ndm_state); | |
823 | return -EINVAL; | |
824 | } | |
825 | ||
826 | if (tb[NDA_DST] == NULL) | |
827 | return -EINVAL; | |
828 | ||
3ad7a4b1 | 829 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex); |
f0b074be MR |
830 | if (err) |
831 | return err; | |
6681712d | 832 | |
5933a7bb MR |
833 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
834 | return -EAFNOSUPPORT; | |
835 | ||
d342894c | 836 | spin_lock_bh(&vxlan->hash_lock); |
e4c7ed41 | 837 | err = vxlan_fdb_create(vxlan, addr, &ip, ndm->ndm_state, flags, |
3ad7a4b1 | 838 | port, src_vni, vni, ifindex, ndm->ndm_flags); |
d342894c | 839 | spin_unlock_bh(&vxlan->hash_lock); |
840 | ||
841 | return err; | |
842 | } | |
843 | ||
3ad7a4b1 RP |
844 | static int __vxlan_fdb_delete(struct vxlan_dev *vxlan, |
845 | const unsigned char *addr, union vxlan_addr ip, | |
846 | __be16 port, __be32 src_vni, u32 vni, u32 ifindex, | |
847 | u16 vid) | |
d342894c | 848 | { |
d342894c | 849 | struct vxlan_fdb *f; |
bc7892ba | 850 | struct vxlan_rdst *rd = NULL; |
3ad7a4b1 | 851 | int err = -ENOENT; |
bc7892ba | 852 | |
3ad7a4b1 | 853 | f = vxlan_find_mac(vxlan, addr, src_vni); |
bc7892ba | 854 | if (!f) |
3ad7a4b1 | 855 | return err; |
bc7892ba | 856 | |
e4c7ed41 CW |
857 | if (!vxlan_addr_any(&ip)) { |
858 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
859 | if (!rd) |
860 | goto out; | |
861 | } | |
862 | ||
bc7892ba MR |
863 | /* remove a destination if it's not the only one on the list, |
864 | * otherwise destroy the fdb entry | |
865 | */ | |
866 | if (rd && !list_is_singular(&f->remotes)) { | |
867 | list_del_rcu(&rd->list); | |
9e4b93f9 | 868 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH); |
dcdc7a59 | 869 | kfree_rcu(rd, rcu); |
bc7892ba | 870 | goto out; |
d342894c | 871 | } |
bc7892ba MR |
872 | |
873 | vxlan_fdb_destroy(vxlan, f); | |
874 | ||
875 | out: | |
3ad7a4b1 RP |
876 | return 0; |
877 | } | |
878 | ||
879 | /* Delete entry (via netlink) */ | |
880 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], | |
881 | struct net_device *dev, | |
882 | const unsigned char *addr, u16 vid) | |
883 | { | |
884 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
885 | union vxlan_addr ip; | |
886 | __be32 src_vni, vni; | |
887 | __be16 port; | |
888 | u32 ifindex; | |
889 | int err; | |
890 | ||
891 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex); | |
892 | if (err) | |
893 | return err; | |
894 | ||
895 | spin_lock_bh(&vxlan->hash_lock); | |
896 | err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex, | |
897 | vid); | |
d342894c | 898 | spin_unlock_bh(&vxlan->hash_lock); |
899 | ||
900 | return err; | |
901 | } | |
902 | ||
903 | /* Dump forwarding table */ | |
904 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 | 905 | struct net_device *dev, |
d297653d | 906 | struct net_device *filter_dev, int *idx) |
d342894c | 907 | { |
908 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
909 | unsigned int h; | |
d297653d | 910 | int err = 0; |
d342894c | 911 | |
912 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
913 | struct vxlan_fdb *f; | |
d342894c | 914 | |
b67bfe0d | 915 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 916 | struct vxlan_rdst *rd; |
6681712d | 917 | |
3e61aa8f | 918 | list_for_each_entry_rcu(rd, &f->remotes, list) { |
d297653d | 919 | if (*idx < cb->args[2]) |
07a51cd3 AW |
920 | goto skip; |
921 | ||
6681712d DS |
922 | err = vxlan_fdb_info(skb, vxlan, f, |
923 | NETLINK_CB(cb->skb).portid, | |
924 | cb->nlh->nlmsg_seq, | |
925 | RTM_NEWNEIGH, | |
926 | NLM_F_MULTI, rd); | |
d297653d | 927 | if (err < 0) |
3e61aa8f | 928 | goto out; |
3e61aa8f | 929 | skip: |
d297653d | 930 | *idx += 1; |
07a51cd3 | 931 | } |
d342894c | 932 | } |
933 | } | |
3e61aa8f | 934 | out: |
d297653d | 935 | return err; |
d342894c | 936 | } |
937 | ||
938 | /* Watch incoming packets to learn mapping between Ethernet address | |
939 | * and Tunnel endpoint. | |
c4b49512 | 940 | * Return true if packet is bogus and should be dropped. |
d342894c | 941 | */ |
26a41ae6 | 942 | static bool vxlan_snoop(struct net_device *dev, |
3ad7a4b1 RP |
943 | union vxlan_addr *src_ip, const u8 *src_mac, |
944 | __be32 vni) | |
d342894c | 945 | { |
946 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
947 | struct vxlan_fdb *f; | |
d342894c | 948 | |
3ad7a4b1 | 949 | f = vxlan_find_mac(vxlan, src_mac, vni); |
d342894c | 950 | if (likely(f)) { |
5ca5461c | 951 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 952 | |
e4c7ed41 | 953 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip))) |
26a41ae6 | 954 | return false; |
955 | ||
956 | /* Don't migrate static entries, drop packets */ | |
eb064c3b | 957 | if (f->state & NUD_NOARP) |
26a41ae6 | 958 | return true; |
d342894c | 959 | |
960 | if (net_ratelimit()) | |
961 | netdev_info(dev, | |
e4c7ed41 | 962 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 963 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 964 | |
e4c7ed41 | 965 | rdst->remote_ip = *src_ip; |
d342894c | 966 | f->updated = jiffies; |
9e4b93f9 | 967 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH); |
d342894c | 968 | } else { |
969 | /* learned new entry */ | |
970 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 971 | |
972 | /* close off race between vxlan_flush and incoming packets */ | |
973 | if (netif_running(dev)) | |
974 | vxlan_fdb_create(vxlan, src_mac, src_ip, | |
975 | NUD_REACHABLE, | |
976 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 977 | vxlan->cfg.dst_port, |
3ad7a4b1 | 978 | vni, |
3bf74b1a | 979 | vxlan->default_dst.remote_vni, |
980 | 0, NTF_SELF); | |
d342894c | 981 | spin_unlock(&vxlan->hash_lock); |
982 | } | |
26a41ae6 | 983 | |
984 | return false; | |
d342894c | 985 | } |
986 | ||
d342894c | 987 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 988 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 989 | { |
553675fb | 990 | struct vxlan_dev *vxlan; |
c6fcc4fc | 991 | struct vxlan_sock *sock4; |
4053ab1b AB |
992 | #if IS_ENABLED(CONFIG_IPV6) |
993 | struct vxlan_sock *sock6; | |
994 | #endif | |
b1be00a6 | 995 | unsigned short family = dev->default_dst.remote_ip.sa.sa_family; |
d342894c | 996 | |
c6fcc4fc | 997 | sock4 = rtnl_dereference(dev->vn4_sock); |
998 | ||
95ab0991 G |
999 | /* The vxlan_sock is only used by dev, leaving group has |
1000 | * no effect on other vxlan devices. | |
1001 | */ | |
c6fcc4fc | 1002 | if (family == AF_INET && sock4 && atomic_read(&sock4->refcnt) == 1) |
95ab0991 | 1003 | return false; |
b1be00a6 | 1004 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1005 | sock6 = rtnl_dereference(dev->vn6_sock); |
1006 | if (family == AF_INET6 && sock6 && atomic_read(&sock6->refcnt) == 1) | |
b1be00a6 JB |
1007 | return false; |
1008 | #endif | |
95ab0991 | 1009 | |
553675fb | 1010 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1011 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1012 | continue; |
d342894c | 1013 | |
c6fcc4fc | 1014 | if (family == AF_INET && |
1015 | rtnl_dereference(vxlan->vn4_sock) != sock4) | |
95ab0991 | 1016 | continue; |
b1be00a6 | 1017 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1018 | if (family == AF_INET6 && |
1019 | rtnl_dereference(vxlan->vn6_sock) != sock6) | |
b1be00a6 JB |
1020 | continue; |
1021 | #endif | |
95ab0991 G |
1022 | |
1023 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1024 | &dev->default_dst.remote_ip)) | |
1025 | continue; | |
1026 | ||
1027 | if (vxlan->default_dst.remote_ifindex != | |
1028 | dev->default_dst.remote_ifindex) | |
1029 | continue; | |
1030 | ||
1031 | return true; | |
553675fb | 1032 | } |
d342894c | 1033 | |
1034 | return false; | |
1035 | } | |
1036 | ||
544a773a | 1037 | static bool __vxlan_sock_release_prep(struct vxlan_sock *vs) |
7c47cedf | 1038 | { |
b1be00a6 | 1039 | struct vxlan_net *vn; |
012a5729 | 1040 | |
b1be00a6 | 1041 | if (!vs) |
544a773a | 1042 | return false; |
7c47cedf | 1043 | if (!atomic_dec_and_test(&vs->refcnt)) |
544a773a | 1044 | return false; |
d342894c | 1045 | |
b1be00a6 | 1046 | vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
1c51a915 | 1047 | spin_lock(&vn->sock_lock); |
7c47cedf | 1048 | hlist_del_rcu(&vs->hlist); |
e7b3db5e | 1049 | udp_tunnel_notify_del_rx_port(vs->sock, |
b9adcd69 AD |
1050 | (vs->flags & VXLAN_F_GPE) ? |
1051 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 1052 | UDP_TUNNEL_TYPE_VXLAN); |
1c51a915 SH |
1053 | spin_unlock(&vn->sock_lock); |
1054 | ||
544a773a | 1055 | return true; |
d342894c | 1056 | } |
1057 | ||
b1be00a6 JB |
1058 | static void vxlan_sock_release(struct vxlan_dev *vxlan) |
1059 | { | |
c6fcc4fc | 1060 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
b1be00a6 | 1061 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1062 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1063 | ||
1064 | rcu_assign_pointer(vxlan->vn6_sock, NULL); | |
544a773a HFS |
1065 | #endif |
1066 | ||
c6fcc4fc | 1067 | rcu_assign_pointer(vxlan->vn4_sock, NULL); |
544a773a HFS |
1068 | synchronize_net(); |
1069 | ||
c6fcc4fc | 1070 | if (__vxlan_sock_release_prep(sock4)) { |
1071 | udp_tunnel_sock_release(sock4->sock); | |
1072 | kfree(sock4); | |
544a773a HFS |
1073 | } |
1074 | ||
1075 | #if IS_ENABLED(CONFIG_IPV6) | |
c6fcc4fc | 1076 | if (__vxlan_sock_release_prep(sock6)) { |
1077 | udp_tunnel_sock_release(sock6->sock); | |
1078 | kfree(sock6); | |
544a773a | 1079 | } |
b1be00a6 JB |
1080 | #endif |
1081 | } | |
1082 | ||
56ef9c90 | 1083 | /* Update multicast group membership when first VNI on |
c4b49512 | 1084 | * multicast address is brought up |
7c47cedf | 1085 | */ |
56ef9c90 | 1086 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1087 | { |
b1be00a6 | 1088 | struct sock *sk; |
e4c7ed41 CW |
1089 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1090 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1091 | int ret = -EINVAL; |
d342894c | 1092 | |
e4c7ed41 | 1093 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1094 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1095 | struct ip_mreqn mreq = { |
1096 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1097 | .imr_ifindex = ifindex, | |
1098 | }; | |
1099 | ||
c6fcc4fc | 1100 | sk = sock4->sock->sk; |
b1be00a6 | 1101 | lock_sock(sk); |
56ef9c90 | 1102 | ret = ip_mc_join_group(sk, &mreq); |
b1be00a6 | 1103 | release_sock(sk); |
e4c7ed41 CW |
1104 | #if IS_ENABLED(CONFIG_IPV6) |
1105 | } else { | |
c6fcc4fc | 1106 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1107 | ||
1108 | sk = sock6->sock->sk; | |
b1be00a6 | 1109 | lock_sock(sk); |
56ef9c90 MRL |
1110 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1111 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1112 | release_sock(sk); |
e4c7ed41 CW |
1113 | #endif |
1114 | } | |
3fc2de2f | 1115 | |
56ef9c90 | 1116 | return ret; |
3fc2de2f | 1117 | } |
1118 | ||
1119 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1120 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1121 | { |
b1be00a6 | 1122 | struct sock *sk; |
e4c7ed41 CW |
1123 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1124 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1125 | int ret = -EINVAL; |
3fc2de2f | 1126 | |
e4c7ed41 | 1127 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1128 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1129 | struct ip_mreqn mreq = { |
1130 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1131 | .imr_ifindex = ifindex, | |
1132 | }; | |
1133 | ||
c6fcc4fc | 1134 | sk = sock4->sock->sk; |
b1be00a6 | 1135 | lock_sock(sk); |
56ef9c90 | 1136 | ret = ip_mc_leave_group(sk, &mreq); |
b1be00a6 | 1137 | release_sock(sk); |
e4c7ed41 CW |
1138 | #if IS_ENABLED(CONFIG_IPV6) |
1139 | } else { | |
c6fcc4fc | 1140 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1141 | ||
1142 | sk = sock6->sock->sk; | |
b1be00a6 | 1143 | lock_sock(sk); |
56ef9c90 MRL |
1144 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1145 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1146 | release_sock(sk); |
e4c7ed41 CW |
1147 | #endif |
1148 | } | |
d342894c | 1149 | |
56ef9c90 | 1150 | return ret; |
d342894c | 1151 | } |
1152 | ||
f14ecebb JB |
1153 | static bool vxlan_remcsum(struct vxlanhdr *unparsed, |
1154 | struct sk_buff *skb, u32 vxflags) | |
dfd8645e | 1155 | { |
7d34fa75 | 1156 | size_t start, offset; |
dfd8645e | 1157 | |
f14ecebb JB |
1158 | if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload) |
1159 | goto out; | |
b7fe10e5 | 1160 | |
f14ecebb JB |
1161 | start = vxlan_rco_start(unparsed->vx_vni); |
1162 | offset = start + vxlan_rco_offset(unparsed->vx_vni); | |
dfd8645e | 1163 | |
7d34fa75 | 1164 | if (!pskb_may_pull(skb, offset + sizeof(u16))) |
be5cfeab | 1165 | return false; |
dfd8645e | 1166 | |
be5cfeab JB |
1167 | skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset, |
1168 | !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
f14ecebb JB |
1169 | out: |
1170 | unparsed->vx_flags &= ~VXLAN_HF_RCO; | |
1171 | unparsed->vx_vni &= VXLAN_VNI_MASK; | |
be5cfeab | 1172 | return true; |
dfd8645e TH |
1173 | } |
1174 | ||
f14ecebb | 1175 | static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed, |
64f87d36 | 1176 | struct sk_buff *skb, u32 vxflags, |
10a5af23 | 1177 | struct vxlan_metadata *md) |
3288af08 | 1178 | { |
f14ecebb | 1179 | struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed; |
10a5af23 | 1180 | struct metadata_dst *tun_dst; |
f14ecebb JB |
1181 | |
1182 | if (!(unparsed->vx_flags & VXLAN_HF_GBP)) | |
1183 | goto out; | |
3288af08 | 1184 | |
3288af08 JB |
1185 | md->gbp = ntohs(gbp->policy_id); |
1186 | ||
10a5af23 | 1187 | tun_dst = (struct metadata_dst *)skb_dst(skb); |
810813c4 | 1188 | if (tun_dst) { |
3288af08 | 1189 | tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
810813c4 DM |
1190 | tun_dst->u.tun_info.options_len = sizeof(*md); |
1191 | } | |
3288af08 JB |
1192 | if (gbp->dont_learn) |
1193 | md->gbp |= VXLAN_GBP_DONT_LEARN; | |
1194 | ||
1195 | if (gbp->policy_applied) | |
1196 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; | |
f14ecebb | 1197 | |
64f87d36 JB |
1198 | /* In flow-based mode, GBP is carried in dst_metadata */ |
1199 | if (!(vxflags & VXLAN_F_COLLECT_METADATA)) | |
1200 | skb->mark = md->gbp; | |
f14ecebb JB |
1201 | out: |
1202 | unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS; | |
3288af08 JB |
1203 | } |
1204 | ||
e1e5314d | 1205 | static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed, |
61618eea | 1206 | __be16 *protocol, |
e1e5314d JB |
1207 | struct sk_buff *skb, u32 vxflags) |
1208 | { | |
1209 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed; | |
1210 | ||
1211 | /* Need to have Next Protocol set for interfaces in GPE mode. */ | |
1212 | if (!gpe->np_applied) | |
1213 | return false; | |
1214 | /* "The initial version is 0. If a receiver does not support the | |
1215 | * version indicated it MUST drop the packet. | |
1216 | */ | |
1217 | if (gpe->version != 0) | |
1218 | return false; | |
1219 | /* "When the O bit is set to 1, the packet is an OAM packet and OAM | |
1220 | * processing MUST occur." However, we don't implement OAM | |
1221 | * processing, thus drop the packet. | |
1222 | */ | |
1223 | if (gpe->oam_flag) | |
1224 | return false; | |
1225 | ||
1226 | switch (gpe->next_protocol) { | |
1227 | case VXLAN_GPE_NP_IPV4: | |
1228 | *protocol = htons(ETH_P_IP); | |
1229 | break; | |
1230 | case VXLAN_GPE_NP_IPV6: | |
1231 | *protocol = htons(ETH_P_IPV6); | |
1232 | break; | |
1233 | case VXLAN_GPE_NP_ETHERNET: | |
1234 | *protocol = htons(ETH_P_TEB); | |
1235 | break; | |
1236 | default: | |
1237 | return false; | |
1238 | } | |
1239 | ||
1240 | unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS; | |
1241 | return true; | |
1242 | } | |
1243 | ||
1ab016e2 JB |
1244 | static bool vxlan_set_mac(struct vxlan_dev *vxlan, |
1245 | struct vxlan_sock *vs, | |
3ad7a4b1 | 1246 | struct sk_buff *skb, __be32 vni) |
614732ea | 1247 | { |
614732ea | 1248 | union vxlan_addr saddr; |
614732ea | 1249 | |
614732ea | 1250 | skb_reset_mac_header(skb); |
614732ea TG |
1251 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
1252 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1253 | ||
1254 | /* Ignore packet loops (and multicast echo) */ | |
1255 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1ab016e2 | 1256 | return false; |
614732ea | 1257 | |
760c6805 | 1258 | /* Get address from the outer IP header */ |
ce212d0f | 1259 | if (vxlan_get_sk_family(vs) == AF_INET) { |
1ab016e2 | 1260 | saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; |
614732ea TG |
1261 | saddr.sa.sa_family = AF_INET; |
1262 | #if IS_ENABLED(CONFIG_IPV6) | |
1263 | } else { | |
1ab016e2 | 1264 | saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr; |
614732ea TG |
1265 | saddr.sa.sa_family = AF_INET6; |
1266 | #endif | |
1267 | } | |
1268 | ||
1ab016e2 | 1269 | if ((vxlan->flags & VXLAN_F_LEARN) && |
3ad7a4b1 | 1270 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, vni)) |
1ab016e2 JB |
1271 | return false; |
1272 | ||
1273 | return true; | |
1274 | } | |
1275 | ||
760c6805 JB |
1276 | static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph, |
1277 | struct sk_buff *skb) | |
1278 | { | |
1279 | int err = 0; | |
1280 | ||
1281 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1282 | err = IP_ECN_decapsulate(oiph, skb); | |
1283 | #if IS_ENABLED(CONFIG_IPV6) | |
1284 | else | |
1285 | err = IP6_ECN_decapsulate(oiph, skb); | |
1286 | #endif | |
1287 | ||
1288 | if (unlikely(err) && log_ecn_error) { | |
1289 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1290 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1291 | &((struct iphdr *)oiph)->saddr, | |
1292 | ((struct iphdr *)oiph)->tos); | |
1293 | else | |
1294 | net_info_ratelimited("non-ECT from %pI6\n", | |
1295 | &((struct ipv6hdr *)oiph)->saddr); | |
1296 | } | |
1297 | return err <= 1; | |
1298 | } | |
1299 | ||
d342894c | 1300 | /* Callback from net/ipv4/udp.c to receive packets */ |
f2d1968e | 1301 | static int vxlan_rcv(struct sock *sk, struct sk_buff *skb) |
d342894c | 1302 | { |
f2d1968e | 1303 | struct pcpu_sw_netstats *stats; |
c9e78efb | 1304 | struct vxlan_dev *vxlan; |
5cfccc5a | 1305 | struct vxlan_sock *vs; |
f14ecebb | 1306 | struct vxlanhdr unparsed; |
ee122c79 TG |
1307 | struct vxlan_metadata _md; |
1308 | struct vxlan_metadata *md = &_md; | |
61618eea | 1309 | __be16 protocol = htons(ETH_P_TEB); |
e1e5314d | 1310 | bool raw_proto = false; |
f2d1968e | 1311 | void *oiph; |
3ad7a4b1 | 1312 | __be32 vni = 0; |
d342894c | 1313 | |
e1e5314d | 1314 | /* Need UDP and VXLAN header to be present */ |
7ce04758 | 1315 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
e5aed006 | 1316 | goto drop; |
d342894c | 1317 | |
f14ecebb | 1318 | unparsed = *vxlan_hdr(skb); |
288b01c8 JB |
1319 | /* VNI flag always required to be set */ |
1320 | if (!(unparsed.vx_flags & VXLAN_HF_VNI)) { | |
1321 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1322 | ntohl(vxlan_hdr(skb)->vx_flags), | |
1323 | ntohl(vxlan_hdr(skb)->vx_vni)); | |
1324 | /* Return non vxlan pkt */ | |
e5aed006 | 1325 | goto drop; |
d342894c | 1326 | } |
288b01c8 JB |
1327 | unparsed.vx_flags &= ~VXLAN_HF_VNI; |
1328 | unparsed.vx_vni &= ~VXLAN_VNI_MASK; | |
d342894c | 1329 | |
559835ea | 1330 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1331 | if (!vs) |
d342894c | 1332 | goto drop; |
d342894c | 1333 | |
3ad7a4b1 RP |
1334 | vni = vxlan_vni(vxlan_hdr(skb)->vx_vni); |
1335 | ||
3ad7a4b1 | 1336 | vxlan = vxlan_vs_find_vni(vs, vni); |
c9e78efb JB |
1337 | if (!vxlan) |
1338 | goto drop; | |
1339 | ||
e1e5314d JB |
1340 | /* For backwards compatibility, only allow reserved fields to be |
1341 | * used by VXLAN extensions if explicitly requested. | |
1342 | */ | |
1343 | if (vs->flags & VXLAN_F_GPE) { | |
1344 | if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags)) | |
1345 | goto drop; | |
1346 | raw_proto = true; | |
1347 | } | |
1348 | ||
1349 | if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto, | |
1350 | !net_eq(vxlan->net, dev_net(vxlan->dev)))) | |
1351 | goto drop; | |
c9e78efb | 1352 | |
ee122c79 | 1353 | if (vxlan_collect_metadata(vs)) { |
10a5af23 | 1354 | struct metadata_dst *tun_dst; |
07dabf20 | 1355 | |
c29a70d2 | 1356 | tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
d817f432 | 1357 | key32_to_tunnel_id(vni), sizeof(*md)); |
c29a70d2 | 1358 | |
ee122c79 TG |
1359 | if (!tun_dst) |
1360 | goto drop; | |
1361 | ||
0f1b7354 | 1362 | md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
10a5af23 JB |
1363 | |
1364 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
ee122c79 TG |
1365 | } else { |
1366 | memset(md, 0, sizeof(*md)); | |
1367 | } | |
1368 | ||
f14ecebb JB |
1369 | if (vs->flags & VXLAN_F_REMCSUM_RX) |
1370 | if (!vxlan_remcsum(&unparsed, skb, vs->flags)) | |
1371 | goto drop; | |
1372 | if (vs->flags & VXLAN_F_GBP) | |
10a5af23 | 1373 | vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md); |
e1e5314d JB |
1374 | /* Note that GBP and GPE can never be active together. This is |
1375 | * ensured in vxlan_dev_configure. | |
1376 | */ | |
3511494c | 1377 | |
f14ecebb | 1378 | if (unparsed.vx_flags || unparsed.vx_vni) { |
3bf39475 TH |
1379 | /* If there are any unprocessed flags remaining treat |
1380 | * this as a malformed packet. This behavior diverges from | |
1381 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1382 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1383 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1384 | * is more robust and provides a little more security in |
1385 | * adding extensions to VXLAN. | |
1386 | */ | |
288b01c8 | 1387 | goto drop; |
3bf39475 TH |
1388 | } |
1389 | ||
e1e5314d | 1390 | if (!raw_proto) { |
3ad7a4b1 | 1391 | if (!vxlan_set_mac(vxlan, vs, skb, vni)) |
e1e5314d JB |
1392 | goto drop; |
1393 | } else { | |
8be0cfa4 | 1394 | skb_reset_mac_header(skb); |
e1e5314d JB |
1395 | skb->dev = vxlan->dev; |
1396 | skb->pkt_type = PACKET_HOST; | |
1397 | } | |
f2d1968e | 1398 | |
f2d1968e JB |
1399 | oiph = skb_network_header(skb); |
1400 | skb_reset_network_header(skb); | |
1401 | ||
1402 | if (!vxlan_ecn_decapsulate(vs, oiph, skb)) { | |
1403 | ++vxlan->dev->stats.rx_frame_errors; | |
1404 | ++vxlan->dev->stats.rx_errors; | |
1405 | goto drop; | |
1406 | } | |
1407 | ||
1408 | stats = this_cpu_ptr(vxlan->dev->tstats); | |
1409 | u64_stats_update_begin(&stats->syncp); | |
1410 | stats->rx_packets++; | |
1411 | stats->rx_bytes += skb->len; | |
1412 | u64_stats_update_end(&stats->syncp); | |
1413 | ||
1414 | gro_cells_receive(&vxlan->gro_cells, skb); | |
5cfccc5a PS |
1415 | return 0; |
1416 | ||
1417 | drop: | |
288b01c8 JB |
1418 | /* Consume bad packet */ |
1419 | kfree_skb(skb); | |
1420 | return 0; | |
5cfccc5a PS |
1421 | } |
1422 | ||
3ad7a4b1 | 1423 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
e4f67add DS |
1424 | { |
1425 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1426 | struct arphdr *parp; | |
1427 | u8 *arpptr, *sha; | |
1428 | __be32 sip, tip; | |
1429 | struct neighbour *n; | |
1430 | ||
1431 | if (dev->flags & IFF_NOARP) | |
1432 | goto out; | |
1433 | ||
1434 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1435 | dev->stats.tx_dropped++; | |
1436 | goto out; | |
1437 | } | |
1438 | parp = arp_hdr(skb); | |
1439 | ||
1440 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1441 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1442 | parp->ar_pro != htons(ETH_P_IP) || | |
1443 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1444 | parp->ar_hln != dev->addr_len || | |
1445 | parp->ar_pln != 4) | |
1446 | goto out; | |
1447 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1448 | sha = arpptr; | |
1449 | arpptr += dev->addr_len; /* sha */ | |
1450 | memcpy(&sip, arpptr, sizeof(sip)); | |
1451 | arpptr += sizeof(sip); | |
1452 | arpptr += dev->addr_len; /* tha */ | |
1453 | memcpy(&tip, arpptr, sizeof(tip)); | |
1454 | ||
1455 | if (ipv4_is_loopback(tip) || | |
1456 | ipv4_is_multicast(tip)) | |
1457 | goto out; | |
1458 | ||
1459 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1460 | ||
1461 | if (n) { | |
e4f67add DS |
1462 | struct vxlan_fdb *f; |
1463 | struct sk_buff *reply; | |
1464 | ||
1465 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1466 | neigh_release(n); | |
1467 | goto out; | |
1468 | } | |
1469 | ||
3ad7a4b1 | 1470 | f = vxlan_find_mac(vxlan, n->ha, vni); |
e4c7ed41 | 1471 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1472 | /* bridge-local neighbor */ |
1473 | neigh_release(n); | |
1474 | goto out; | |
1475 | } | |
1476 | ||
1477 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1478 | n->ha, sha); | |
1479 | ||
1480 | neigh_release(n); | |
1481 | ||
7346135d DS |
1482 | if (reply == NULL) |
1483 | goto out; | |
1484 | ||
e4f67add DS |
1485 | skb_reset_mac_header(reply); |
1486 | __skb_pull(reply, skb_network_offset(reply)); | |
1487 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1488 | reply->pkt_type = PACKET_HOST; | |
1489 | ||
1490 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1491 | dev->stats.rx_dropped++; | |
e4c7ed41 CW |
1492 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
1493 | union vxlan_addr ipa = { | |
1494 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1495 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1496 | }; |
1497 | ||
1498 | vxlan_ip_miss(dev, &ipa); | |
1499 | } | |
e4f67add DS |
1500 | out: |
1501 | consume_skb(skb); | |
1502 | return NETDEV_TX_OK; | |
1503 | } | |
1504 | ||
f564f45c | 1505 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1506 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1507 | struct neighbour *n, bool isrouter) | |
1508 | { | |
1509 | struct net_device *dev = request->dev; | |
1510 | struct sk_buff *reply; | |
1511 | struct nd_msg *ns, *na; | |
1512 | struct ipv6hdr *pip6; | |
1513 | u8 *daddr; | |
1514 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1515 | int ns_olen; | |
1516 | int i, len; | |
1517 | ||
1518 | if (dev == NULL) | |
1519 | return NULL; | |
1520 | ||
1521 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1522 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1523 | reply = alloc_skb(len, GFP_ATOMIC); | |
1524 | if (reply == NULL) | |
1525 | return NULL; | |
1526 | ||
1527 | reply->protocol = htons(ETH_P_IPV6); | |
1528 | reply->dev = dev; | |
1529 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1530 | skb_push(reply, sizeof(struct ethhdr)); | |
6297b91c | 1531 | skb_reset_mac_header(reply); |
4b29dba9 DS |
1532 | |
1533 | ns = (struct nd_msg *)skb_transport_header(request); | |
1534 | ||
1535 | daddr = eth_hdr(request)->h_source; | |
1536 | ns_olen = request->len - skb_transport_offset(request) - sizeof(*ns); | |
1537 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { | |
1538 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1539 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1540 | break; | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | /* Ethernet header */ | |
1545 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1546 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1547 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1548 | reply->protocol = htons(ETH_P_IPV6); | |
1549 | ||
1550 | skb_pull(reply, sizeof(struct ethhdr)); | |
6297b91c | 1551 | skb_reset_network_header(reply); |
4b29dba9 DS |
1552 | skb_put(reply, sizeof(struct ipv6hdr)); |
1553 | ||
1554 | /* IPv6 header */ | |
1555 | ||
1556 | pip6 = ipv6_hdr(reply); | |
1557 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1558 | pip6->version = 6; | |
1559 | pip6->priority = ipv6_hdr(request)->priority; | |
1560 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1561 | pip6->hop_limit = 255; | |
1562 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1563 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1564 | ||
1565 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
6297b91c | 1566 | skb_reset_transport_header(reply); |
4b29dba9 DS |
1567 | |
1568 | na = (struct nd_msg *)skb_put(reply, sizeof(*na) + na_olen); | |
1569 | ||
1570 | /* Neighbor Advertisement */ | |
1571 | memset(na, 0, sizeof(*na)+na_olen); | |
1572 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; | |
1573 | na->icmph.icmp6_router = isrouter; | |
1574 | na->icmph.icmp6_override = 1; | |
1575 | na->icmph.icmp6_solicited = 1; | |
1576 | na->target = ns->target; | |
1577 | ether_addr_copy(&na->opt[2], n->ha); | |
1578 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1579 | na->opt[1] = na_olen >> 3; | |
1580 | ||
1581 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1582 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1583 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1584 | ||
1585 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1586 | ||
1587 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1588 | ||
1589 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1590 | ||
1591 | return reply; | |
1592 | } | |
1593 | ||
3ad7a4b1 | 1594 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
f564f45c CW |
1595 | { |
1596 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4b29dba9 | 1597 | struct nd_msg *msg; |
f564f45c | 1598 | const struct ipv6hdr *iphdr; |
8dcd81a9 | 1599 | const struct in6_addr *daddr; |
4b29dba9 DS |
1600 | struct neighbour *n; |
1601 | struct inet6_dev *in6_dev; | |
f564f45c CW |
1602 | |
1603 | in6_dev = __in6_dev_get(dev); | |
1604 | if (!in6_dev) | |
1605 | goto out; | |
1606 | ||
f564f45c | 1607 | iphdr = ipv6_hdr(skb); |
f564f45c CW |
1608 | daddr = &iphdr->daddr; |
1609 | ||
f564f45c CW |
1610 | msg = (struct nd_msg *)skb_transport_header(skb); |
1611 | if (msg->icmph.icmp6_code != 0 || | |
1612 | msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION) | |
1613 | goto out; | |
1614 | ||
4b29dba9 DS |
1615 | if (ipv6_addr_loopback(daddr) || |
1616 | ipv6_addr_is_multicast(&msg->target)) | |
1617 | goto out; | |
1618 | ||
1619 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1620 | |
1621 | if (n) { | |
1622 | struct vxlan_fdb *f; | |
4b29dba9 | 1623 | struct sk_buff *reply; |
f564f45c CW |
1624 | |
1625 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1626 | neigh_release(n); | |
1627 | goto out; | |
1628 | } | |
1629 | ||
3ad7a4b1 | 1630 | f = vxlan_find_mac(vxlan, n->ha, vni); |
f564f45c CW |
1631 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
1632 | /* bridge-local neighbor */ | |
1633 | neigh_release(n); | |
1634 | goto out; | |
1635 | } | |
1636 | ||
4b29dba9 DS |
1637 | reply = vxlan_na_create(skb, n, |
1638 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1639 | ||
f564f45c | 1640 | neigh_release(n); |
4b29dba9 DS |
1641 | |
1642 | if (reply == NULL) | |
1643 | goto out; | |
1644 | ||
1645 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1646 | dev->stats.rx_dropped++; | |
1647 | ||
f564f45c | 1648 | } else if (vxlan->flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1649 | union vxlan_addr ipa = { |
1650 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1651 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1652 | }; |
1653 | ||
f564f45c CW |
1654 | vxlan_ip_miss(dev, &ipa); |
1655 | } | |
1656 | ||
1657 | out: | |
1658 | consume_skb(skb); | |
1659 | return NETDEV_TX_OK; | |
1660 | } | |
1661 | #endif | |
1662 | ||
e4f67add DS |
1663 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
1664 | { | |
1665 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1666 | struct neighbour *n; | |
e4f67add DS |
1667 | |
1668 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
1669 | return false; | |
1670 | ||
1671 | n = NULL; | |
1672 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1673 | case ETH_P_IP: | |
e15a00aa CW |
1674 | { |
1675 | struct iphdr *pip; | |
1676 | ||
e4f67add DS |
1677 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
1678 | return false; | |
1679 | pip = ip_hdr(skb); | |
1680 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
e4c7ed41 CW |
1681 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { |
1682 | union vxlan_addr ipa = { | |
1683 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 1684 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1685 | }; |
1686 | ||
1687 | vxlan_ip_miss(dev, &ipa); | |
1688 | return false; | |
1689 | } | |
1690 | ||
e4f67add | 1691 | break; |
e15a00aa CW |
1692 | } |
1693 | #if IS_ENABLED(CONFIG_IPV6) | |
1694 | case ETH_P_IPV6: | |
1695 | { | |
1696 | struct ipv6hdr *pip6; | |
1697 | ||
1698 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
1699 | return false; | |
1700 | pip6 = ipv6_hdr(skb); | |
1701 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
1702 | if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { | |
1703 | union vxlan_addr ipa = { | |
1704 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 1705 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
1706 | }; |
1707 | ||
1708 | vxlan_ip_miss(dev, &ipa); | |
1709 | return false; | |
1710 | } | |
1711 | ||
1712 | break; | |
1713 | } | |
1714 | #endif | |
e4f67add DS |
1715 | default: |
1716 | return false; | |
1717 | } | |
1718 | ||
1719 | if (n) { | |
1720 | bool diff; | |
1721 | ||
7367d0b5 | 1722 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
1723 | if (diff) { |
1724 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
1725 | dev->addr_len); | |
1726 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
1727 | } | |
1728 | neigh_release(n); | |
1729 | return diff; | |
e4c7ed41 CW |
1730 | } |
1731 | ||
e4f67add DS |
1732 | return false; |
1733 | } | |
1734 | ||
af33c1ad | 1735 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
1736 | struct vxlan_metadata *md) |
1737 | { | |
1738 | struct vxlanhdr_gbp *gbp; | |
1739 | ||
db79a621 TG |
1740 | if (!md->gbp) |
1741 | return; | |
1742 | ||
3511494c | 1743 | gbp = (struct vxlanhdr_gbp *)vxh; |
54bfd872 | 1744 | vxh->vx_flags |= VXLAN_HF_GBP; |
3511494c TG |
1745 | |
1746 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
1747 | gbp->dont_learn = 1; | |
1748 | ||
1749 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
1750 | gbp->policy_applied = 1; | |
1751 | ||
1752 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
1753 | } | |
1754 | ||
e1e5314d JB |
1755 | static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags, |
1756 | __be16 protocol) | |
1757 | { | |
1758 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh; | |
1759 | ||
1760 | gpe->np_applied = 1; | |
1761 | ||
1762 | switch (protocol) { | |
1763 | case htons(ETH_P_IP): | |
1764 | gpe->next_protocol = VXLAN_GPE_NP_IPV4; | |
1765 | return 0; | |
1766 | case htons(ETH_P_IPV6): | |
1767 | gpe->next_protocol = VXLAN_GPE_NP_IPV6; | |
1768 | return 0; | |
1769 | case htons(ETH_P_TEB): | |
1770 | gpe->next_protocol = VXLAN_GPE_NP_ETHERNET; | |
1771 | return 0; | |
1772 | } | |
1773 | return -EPFNOSUPPORT; | |
1774 | } | |
1775 | ||
f491e56d JB |
1776 | static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst, |
1777 | int iphdr_len, __be32 vni, | |
1778 | struct vxlan_metadata *md, u32 vxflags, | |
b4ed5cad | 1779 | bool udp_sum) |
e4c7ed41 | 1780 | { |
e4c7ed41 | 1781 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
1782 | int min_headroom; |
1783 | int err; | |
dfd8645e | 1784 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
e1e5314d | 1785 | __be16 inner_protocol = htons(ETH_P_TEB); |
dfd8645e | 1786 | |
af33c1ad | 1787 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
1788 | skb->ip_summed == CHECKSUM_PARTIAL) { |
1789 | int csum_start = skb_checksum_start_offset(skb); | |
1790 | ||
1791 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
1792 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
1793 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
b5708501 | 1794 | skb->csum_offset == offsetof(struct tcphdr, check))) |
dfd8645e | 1795 | type |= SKB_GSO_TUNNEL_REMCSUM; |
dfd8645e | 1796 | } |
e4c7ed41 | 1797 | |
e4c7ed41 | 1798 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
4a4f86cc | 1799 | + VXLAN_HLEN + iphdr_len; |
649c5b8b PS |
1800 | |
1801 | /* Need space for new headers (invalidates iph ptr) */ | |
1802 | err = skb_cow_head(skb, min_headroom); | |
e1e5314d | 1803 | if (unlikely(err)) |
c46b7897 | 1804 | return err; |
649c5b8b | 1805 | |
aed069df AD |
1806 | err = iptunnel_handle_offloads(skb, type); |
1807 | if (err) | |
c46b7897 | 1808 | return err; |
b736a623 | 1809 | |
49560532 | 1810 | vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); |
54bfd872 JB |
1811 | vxh->vx_flags = VXLAN_HF_VNI; |
1812 | vxh->vx_vni = vxlan_vni_field(vni); | |
49560532 | 1813 | |
dfd8645e | 1814 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
54bfd872 | 1815 | unsigned int start; |
dfd8645e | 1816 | |
54bfd872 JB |
1817 | start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr); |
1818 | vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset); | |
1819 | vxh->vx_flags |= VXLAN_HF_RCO; | |
dfd8645e TH |
1820 | |
1821 | if (!skb_is_gso(skb)) { | |
1822 | skb->ip_summed = CHECKSUM_NONE; | |
1823 | skb->encapsulation = 0; | |
1824 | } | |
1825 | } | |
1826 | ||
af33c1ad TH |
1827 | if (vxflags & VXLAN_F_GBP) |
1828 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
e1e5314d JB |
1829 | if (vxflags & VXLAN_F_GPE) { |
1830 | err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol); | |
1831 | if (err < 0) | |
c46b7897 | 1832 | return err; |
e1e5314d JB |
1833 | inner_protocol = skb->protocol; |
1834 | } | |
3511494c | 1835 | |
e1e5314d | 1836 | skb_set_inner_protocol(skb, inner_protocol); |
039f5062 | 1837 | return 0; |
49560532 | 1838 | } |
49560532 | 1839 | |
655c3de1 | 1840 | static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev, |
1841 | struct vxlan_sock *sock4, | |
1a8496ba | 1842 | struct sk_buff *skb, int oif, u8 tos, |
4ecb1d83 | 1843 | __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport, |
0c1d70af | 1844 | struct dst_cache *dst_cache, |
db3c6139 | 1845 | const struct ip_tunnel_info *info) |
1a8496ba | 1846 | { |
db3c6139 | 1847 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
1a8496ba JB |
1848 | struct rtable *rt = NULL; |
1849 | struct flowi4 fl4; | |
1850 | ||
655c3de1 | 1851 | if (!sock4) |
1852 | return ERR_PTR(-EIO); | |
1853 | ||
db3c6139 DB |
1854 | if (tos && !info) |
1855 | use_cache = false; | |
1856 | if (use_cache) { | |
0c1d70af PA |
1857 | rt = dst_cache_get_ip4(dst_cache, saddr); |
1858 | if (rt) | |
1859 | return rt; | |
1860 | } | |
1861 | ||
1a8496ba JB |
1862 | memset(&fl4, 0, sizeof(fl4)); |
1863 | fl4.flowi4_oif = oif; | |
1864 | fl4.flowi4_tos = RT_TOS(tos); | |
1865 | fl4.flowi4_mark = skb->mark; | |
1866 | fl4.flowi4_proto = IPPROTO_UDP; | |
1867 | fl4.daddr = daddr; | |
272d96a5 | 1868 | fl4.saddr = *saddr; |
4ecb1d83 MP |
1869 | fl4.fl4_dport = dport; |
1870 | fl4.fl4_sport = sport; | |
1a8496ba JB |
1871 | |
1872 | rt = ip_route_output_key(vxlan->net, &fl4); | |
655c3de1 | 1873 | if (likely(!IS_ERR(rt))) { |
1874 | if (rt->dst.dev == dev) { | |
1875 | netdev_dbg(dev, "circular route to %pI4\n", &daddr); | |
1876 | ip_rt_put(rt); | |
1877 | return ERR_PTR(-ELOOP); | |
1878 | } | |
1879 | ||
1a8496ba | 1880 | *saddr = fl4.saddr; |
0c1d70af PA |
1881 | if (use_cache) |
1882 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); | |
655c3de1 | 1883 | } else { |
1884 | netdev_dbg(dev, "no route to %pI4\n", &daddr); | |
1885 | return ERR_PTR(-ENETUNREACH); | |
0c1d70af | 1886 | } |
1a8496ba JB |
1887 | return rt; |
1888 | } | |
1889 | ||
e5d4b29f JB |
1890 | #if IS_ENABLED(CONFIG_IPV6) |
1891 | static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan, | |
655c3de1 | 1892 | struct net_device *dev, |
03dc52a8 | 1893 | struct vxlan_sock *sock6, |
1400615d | 1894 | struct sk_buff *skb, int oif, u8 tos, |
e7f70af1 | 1895 | __be32 label, |
e5d4b29f | 1896 | const struct in6_addr *daddr, |
0c1d70af | 1897 | struct in6_addr *saddr, |
4ecb1d83 | 1898 | __be16 dport, __be16 sport, |
db3c6139 DB |
1899 | struct dst_cache *dst_cache, |
1900 | const struct ip_tunnel_info *info) | |
e5d4b29f | 1901 | { |
db3c6139 | 1902 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e5d4b29f JB |
1903 | struct dst_entry *ndst; |
1904 | struct flowi6 fl6; | |
1905 | int err; | |
1906 | ||
c6fcc4fc | 1907 | if (!sock6) |
1908 | return ERR_PTR(-EIO); | |
1909 | ||
1400615d DB |
1910 | if (tos && !info) |
1911 | use_cache = false; | |
db3c6139 | 1912 | if (use_cache) { |
0c1d70af PA |
1913 | ndst = dst_cache_get_ip6(dst_cache, saddr); |
1914 | if (ndst) | |
1915 | return ndst; | |
1916 | } | |
1917 | ||
e5d4b29f JB |
1918 | memset(&fl6, 0, sizeof(fl6)); |
1919 | fl6.flowi6_oif = oif; | |
1920 | fl6.daddr = *daddr; | |
272d96a5 | 1921 | fl6.saddr = *saddr; |
eaa93bf4 | 1922 | fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label); |
e5d4b29f JB |
1923 | fl6.flowi6_mark = skb->mark; |
1924 | fl6.flowi6_proto = IPPROTO_UDP; | |
4ecb1d83 MP |
1925 | fl6.fl6_dport = dport; |
1926 | fl6.fl6_sport = sport; | |
e5d4b29f JB |
1927 | |
1928 | err = ipv6_stub->ipv6_dst_lookup(vxlan->net, | |
c6fcc4fc | 1929 | sock6->sock->sk, |
e5d4b29f | 1930 | &ndst, &fl6); |
655c3de1 | 1931 | if (unlikely(err < 0)) { |
1932 | netdev_dbg(dev, "no route to %pI6\n", daddr); | |
1933 | return ERR_PTR(-ENETUNREACH); | |
1934 | } | |
1935 | ||
1936 | if (unlikely(ndst->dev == dev)) { | |
1937 | netdev_dbg(dev, "circular route to %pI6\n", daddr); | |
1938 | dst_release(ndst); | |
1939 | return ERR_PTR(-ELOOP); | |
1940 | } | |
e5d4b29f JB |
1941 | |
1942 | *saddr = fl6.saddr; | |
db3c6139 | 1943 | if (use_cache) |
0c1d70af | 1944 | dst_cache_set_ip6(dst_cache, ndst, saddr); |
e5d4b29f JB |
1945 | return ndst; |
1946 | } | |
1947 | #endif | |
1948 | ||
9dcc71e1 SS |
1949 | /* Bypass encapsulation if the destination is local */ |
1950 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
3ad7a4b1 | 1951 | struct vxlan_dev *dst_vxlan, __be32 vni) |
9dcc71e1 | 1952 | { |
8f84985f | 1953 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
1954 | union vxlan_addr loopback; |
1955 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
1956 | struct net_device *dev = skb->dev; |
1957 | int len = skb->len; | |
9dcc71e1 | 1958 | |
8f84985f LR |
1959 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
1960 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
1961 | skb->pkt_type = PACKET_HOST; |
1962 | skb->encapsulation = 0; | |
1963 | skb->dev = dst_vxlan->dev; | |
1964 | __skb_pull(skb, skb_network_offset(skb)); | |
1965 | ||
e4c7ed41 CW |
1966 | if (remote_ip->sa.sa_family == AF_INET) { |
1967 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1968 | loopback.sa.sa_family = AF_INET; | |
1969 | #if IS_ENABLED(CONFIG_IPV6) | |
1970 | } else { | |
1971 | loopback.sin6.sin6_addr = in6addr_loopback; | |
1972 | loopback.sa.sa_family = AF_INET6; | |
1973 | #endif | |
1974 | } | |
1975 | ||
9dcc71e1 | 1976 | if (dst_vxlan->flags & VXLAN_F_LEARN) |
3ad7a4b1 | 1977 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source, vni); |
9dcc71e1 SS |
1978 | |
1979 | u64_stats_update_begin(&tx_stats->syncp); | |
1980 | tx_stats->tx_packets++; | |
ce6502a8 | 1981 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
1982 | u64_stats_update_end(&tx_stats->syncp); |
1983 | ||
1984 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
1985 | u64_stats_update_begin(&rx_stats->syncp); | |
1986 | rx_stats->rx_packets++; | |
ce6502a8 | 1987 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
1988 | u64_stats_update_end(&rx_stats->syncp); |
1989 | } else { | |
ce6502a8 | 1990 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
1991 | } |
1992 | } | |
1993 | ||
fee1fad7 | 1994 | static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev, |
1995 | struct vxlan_dev *vxlan, union vxlan_addr *daddr, | |
1f6cc07e | 1996 | __be16 dst_port, __be32 vni, struct dst_entry *dst, |
fee1fad7 | 1997 | u32 rt_flags) |
1998 | { | |
1999 | #if IS_ENABLED(CONFIG_IPV6) | |
2000 | /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of | |
2001 | * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple | |
2002 | * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry. | |
2003 | */ | |
2004 | BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL); | |
2005 | #endif | |
2006 | /* Bypass encapsulation if the destination is local */ | |
2007 | if (rt_flags & RTCF_LOCAL && | |
2008 | !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
2009 | struct vxlan_dev *dst_vxlan; | |
2010 | ||
2011 | dst_release(dst); | |
2012 | dst_vxlan = vxlan_find_vni(vxlan->net, vni, | |
2013 | daddr->sa.sa_family, dst_port, | |
2014 | vxlan->flags); | |
2015 | if (!dst_vxlan) { | |
2016 | dev->stats.tx_errors++; | |
2017 | kfree_skb(skb); | |
2018 | ||
2019 | return -ENOENT; | |
2020 | } | |
3ad7a4b1 | 2021 | vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni); |
fee1fad7 | 2022 | return 1; |
2023 | } | |
2024 | ||
2025 | return 0; | |
2026 | } | |
2027 | ||
4ad16930 | 2028 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
3ad7a4b1 RP |
2029 | __be32 default_vni, struct vxlan_rdst *rdst, |
2030 | bool did_rsc) | |
d342894c | 2031 | { |
d71785ff | 2032 | struct dst_cache *dst_cache; |
3093fbe7 | 2033 | struct ip_tunnel_info *info; |
d342894c | 2034 | struct vxlan_dev *vxlan = netdev_priv(dev); |
0770b53b | 2035 | const struct iphdr *old_iph = ip_hdr(skb); |
e4c7ed41 | 2036 | union vxlan_addr *dst; |
272d96a5 | 2037 | union vxlan_addr remote_ip, local_ip; |
ee122c79 TG |
2038 | struct vxlan_metadata _md; |
2039 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 2040 | __be16 src_port = 0, dst_port; |
655c3de1 | 2041 | struct dst_entry *ndst = NULL; |
e7f70af1 | 2042 | __be32 vni, label; |
d342894c | 2043 | __u8 tos, ttl; |
0e6fbc5b | 2044 | int err; |
ee122c79 | 2045 | u32 flags = vxlan->flags; |
b4ed5cad | 2046 | bool udp_sum = false; |
f491e56d | 2047 | bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev)); |
d342894c | 2048 | |
61adedf3 | 2049 | info = skb_tunnel_info(skb); |
3093fbe7 | 2050 | |
ee122c79 | 2051 | if (rdst) { |
0770b53b | 2052 | dst = &rdst->remote_ip; |
2053 | if (vxlan_addr_any(dst)) { | |
2054 | if (did_rsc) { | |
2055 | /* short-circuited back to local bridge */ | |
3ad7a4b1 | 2056 | vxlan_encap_bypass(skb, vxlan, vxlan, default_vni); |
0770b53b | 2057 | return; |
2058 | } | |
2059 | goto drop; | |
2060 | } | |
2061 | ||
0dfbdf41 | 2062 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
3ad7a4b1 | 2063 | vni = (rdst->remote_vni) ? : default_vni; |
1158632b | 2064 | local_ip = vxlan->cfg.saddr; |
d71785ff | 2065 | dst_cache = &rdst->dst_cache; |
0770b53b | 2066 | md->gbp = skb->mark; |
2067 | ttl = vxlan->cfg.ttl; | |
2068 | if (!ttl && vxlan_addr_multicast(dst)) | |
2069 | ttl = 1; | |
2070 | ||
2071 | tos = vxlan->cfg.tos; | |
2072 | if (tos == 1) | |
2073 | tos = ip_tunnel_get_dsfield(old_iph, skb); | |
2074 | ||
2075 | if (dst->sa.sa_family == AF_INET) | |
2076 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX); | |
2077 | else | |
2078 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); | |
2079 | label = vxlan->cfg.label; | |
ee122c79 TG |
2080 | } else { |
2081 | if (!info) { | |
2082 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
2083 | dev->name); | |
2084 | goto drop; | |
2085 | } | |
b1be00a6 | 2086 | remote_ip.sa.sa_family = ip_tunnel_info_af(info); |
272d96a5 | 2087 | if (remote_ip.sa.sa_family == AF_INET) { |
a725e514 | 2088 | remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; |
272d96a5 | 2089 | local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src; |
2090 | } else { | |
a725e514 | 2091 | remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; |
272d96a5 | 2092 | local_ip.sin6.sin6_addr = info->key.u.ipv6.src; |
2093 | } | |
ee122c79 | 2094 | dst = &remote_ip; |
0770b53b | 2095 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
2096 | vni = tunnel_id_to_key32(info->key.tun_id); | |
d71785ff | 2097 | dst_cache = &info->dst_cache; |
0770b53b | 2098 | if (info->options_len) |
2099 | md = ip_tunnel_info_opts(info); | |
a725e514 JB |
2100 | ttl = info->key.ttl; |
2101 | tos = info->key.tos; | |
e7f70af1 | 2102 | label = info->key.label; |
b4ed5cad | 2103 | udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
a725e514 | 2104 | } |
0770b53b | 2105 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
2106 | vxlan->cfg.port_max, true); | |
a725e514 | 2107 | |
56de859e | 2108 | rcu_read_lock(); |
e4c7ed41 | 2109 | if (dst->sa.sa_family == AF_INET) { |
c6fcc4fc | 2110 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
c46b7897 | 2111 | struct rtable *rt; |
0770b53b | 2112 | __be16 df = 0; |
c6fcc4fc | 2113 | |
655c3de1 | 2114 | rt = vxlan_get_route(vxlan, dev, sock4, skb, |
1a8496ba | 2115 | rdst ? rdst->remote_ifindex : 0, tos, |
272d96a5 | 2116 | dst->sin.sin_addr.s_addr, |
1158632b | 2117 | &local_ip.sin.sin_addr.s_addr, |
4ecb1d83 | 2118 | dst_port, src_port, |
d71785ff | 2119 | dst_cache, info); |
8ebd115b DM |
2120 | if (IS_ERR(rt)) { |
2121 | err = PTR_ERR(rt); | |
c46b7897 | 2122 | goto tx_error; |
8ebd115b | 2123 | } |
e4c7ed41 CW |
2124 | |
2125 | /* Bypass encapsulation if the destination is local */ | |
fee1fad7 | 2126 | if (!info) { |
2127 | err = encap_bypass_if_local(skb, dev, vxlan, dst, | |
2128 | dst_port, vni, &rt->dst, | |
2129 | rt->rt_flags); | |
2130 | if (err) | |
56de859e | 2131 | goto out_unlock; |
fee1fad7 | 2132 | } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) { |
6ceb31ca | 2133 | df = htons(IP_DF); |
fee1fad7 | 2134 | } |
6ceb31ca | 2135 | |
c46b7897 | 2136 | ndst = &rt->dst; |
e4c7ed41 CW |
2137 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
2138 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
c46b7897 | 2139 | err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr), |
54bfd872 | 2140 | vni, md, flags, udp_sum); |
f491e56d | 2141 | if (err < 0) |
c46b7897 | 2142 | goto tx_error; |
f491e56d | 2143 | |
1158632b | 2144 | udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr, |
f491e56d JB |
2145 | dst->sin.sin_addr.s_addr, tos, ttl, df, |
2146 | src_port, dst_port, xnet, !udp_sum); | |
e4c7ed41 CW |
2147 | #if IS_ENABLED(CONFIG_IPV6) |
2148 | } else { | |
c6fcc4fc | 2149 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
e4c7ed41 | 2150 | |
655c3de1 | 2151 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, |
1400615d | 2152 | rdst ? rdst->remote_ifindex : 0, tos, |
272d96a5 | 2153 | label, &dst->sin6.sin6_addr, |
1158632b | 2154 | &local_ip.sin6.sin6_addr, |
4ecb1d83 | 2155 | dst_port, src_port, |
db3c6139 | 2156 | dst_cache, info); |
e5d4b29f | 2157 | if (IS_ERR(ndst)) { |
8ebd115b | 2158 | err = PTR_ERR(ndst); |
c46b7897 | 2159 | ndst = NULL; |
9dcc71e1 | 2160 | goto tx_error; |
e4c7ed41 | 2161 | } |
655c3de1 | 2162 | |
fee1fad7 | 2163 | if (!info) { |
2164 | u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
49560532 | 2165 | |
fee1fad7 | 2166 | err = encap_bypass_if_local(skb, dev, vxlan, dst, |
2167 | dst_port, vni, ndst, | |
2168 | rt6i_flags); | |
2169 | if (err) | |
56de859e | 2170 | goto out_unlock; |
fee1fad7 | 2171 | } |
35e2d115 | 2172 | |
1400615d | 2173 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
e4c7ed41 | 2174 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
f491e56d JB |
2175 | skb_scrub_packet(skb, xnet); |
2176 | err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr), | |
54bfd872 | 2177 | vni, md, flags, udp_sum); |
c46b7897 | 2178 | if (err < 0) |
2179 | goto tx_error; | |
2180 | ||
0770b53b | 2181 | udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev, |
1158632b | 2182 | &local_ip.sin6.sin6_addr, |
272d96a5 | 2183 | &dst->sin6.sin6_addr, tos, ttl, |
e7f70af1 | 2184 | label, src_port, dst_port, !udp_sum); |
e4c7ed41 CW |
2185 | #endif |
2186 | } | |
56de859e JK |
2187 | out_unlock: |
2188 | rcu_read_unlock(); | |
4ad16930 | 2189 | return; |
d342894c | 2190 | |
2191 | drop: | |
2192 | dev->stats.tx_dropped++; | |
c46b7897 | 2193 | dev_kfree_skb(skb); |
2194 | return; | |
d342894c | 2195 | |
2196 | tx_error: | |
56de859e | 2197 | rcu_read_unlock(); |
655c3de1 | 2198 | if (err == -ELOOP) |
2199 | dev->stats.collisions++; | |
2200 | else if (err == -ENETUNREACH) | |
2201 | dev->stats.tx_carrier_errors++; | |
c46b7897 | 2202 | dst_release(ndst); |
d342894c | 2203 | dev->stats.tx_errors++; |
c46b7897 | 2204 | kfree_skb(skb); |
d342894c | 2205 | } |
2206 | ||
6681712d DS |
2207 | /* Transmit local packets over Vxlan |
2208 | * | |
2209 | * Outer IP header inherits ECN and DF from inner header. | |
2210 | * Outer UDP destination is the VXLAN assigned port. | |
2211 | * source port is based on hash of flow | |
2212 | */ | |
2213 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2214 | { | |
2215 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3093fbe7 | 2216 | const struct ip_tunnel_info *info; |
6681712d DS |
2217 | struct ethhdr *eth; |
2218 | bool did_rsc = false; | |
8f646c92 | 2219 | struct vxlan_rdst *rdst, *fdst = NULL; |
6681712d | 2220 | struct vxlan_fdb *f; |
3ad7a4b1 | 2221 | __be32 vni = 0; |
6681712d | 2222 | |
61adedf3 | 2223 | info = skb_tunnel_info(skb); |
3093fbe7 | 2224 | |
6681712d | 2225 | skb_reset_mac_header(skb); |
6681712d | 2226 | |
47e5d1b0 | 2227 | if (vxlan->flags & VXLAN_F_COLLECT_METADATA) { |
3ad7a4b1 RP |
2228 | if (info && info->mode & IP_TUNNEL_INFO_BRIDGE && |
2229 | info->mode & IP_TUNNEL_INFO_TX) { | |
2230 | vni = tunnel_id_to_key32(info->key.tun_id); | |
2231 | } else { | |
2232 | if (info && info->mode & IP_TUNNEL_INFO_TX) | |
2233 | vxlan_xmit_one(skb, dev, vni, NULL, false); | |
2234 | else | |
2235 | kfree_skb(skb); | |
2236 | return NETDEV_TX_OK; | |
2237 | } | |
47e5d1b0 JB |
2238 | } |
2239 | ||
2240 | if (vxlan->flags & VXLAN_F_PROXY) { | |
2241 | eth = eth_hdr(skb); | |
f564f45c | 2242 | if (ntohs(eth->h_proto) == ETH_P_ARP) |
3ad7a4b1 | 2243 | return arp_reduce(dev, skb, vni); |
f564f45c CW |
2244 | #if IS_ENABLED(CONFIG_IPV6) |
2245 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && | |
91269e39 LR |
2246 | pskb_may_pull(skb, sizeof(struct ipv6hdr) |
2247 | + sizeof(struct nd_msg)) && | |
f564f45c CW |
2248 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { |
2249 | struct nd_msg *msg; | |
2250 | ||
2251 | msg = (struct nd_msg *)skb_transport_header(skb); | |
2252 | if (msg->icmph.icmp6_code == 0 && | |
2253 | msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
3ad7a4b1 | 2254 | return neigh_reduce(dev, skb, vni); |
f564f45c CW |
2255 | } |
2256 | #endif | |
2257 | } | |
6681712d | 2258 | |
47e5d1b0 | 2259 | eth = eth_hdr(skb); |
3ad7a4b1 | 2260 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2261 | did_rsc = false; |
2262 | ||
2263 | if (f && (f->flags & NTF_ROUTER) && (vxlan->flags & VXLAN_F_RSC) && | |
e15a00aa CW |
2264 | (ntohs(eth->h_proto) == ETH_P_IP || |
2265 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2266 | did_rsc = route_shortcircuit(dev, skb); |
2267 | if (did_rsc) | |
3ad7a4b1 | 2268 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2269 | } |
2270 | ||
6681712d | 2271 | if (f == NULL) { |
3ad7a4b1 | 2272 | f = vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae MR |
2273 | if (f == NULL) { |
2274 | if ((vxlan->flags & VXLAN_F_L2MISS) && | |
2275 | !is_multicast_ether_addr(eth->h_dest)) | |
2276 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2277 | ||
2278 | dev->stats.tx_dropped++; | |
8f646c92 | 2279 | kfree_skb(skb); |
afbd8bae MR |
2280 | return NETDEV_TX_OK; |
2281 | } | |
2282 | } | |
6681712d | 2283 | |
afbd8bae MR |
2284 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2285 | struct sk_buff *skb1; | |
6681712d | 2286 | |
8f646c92 ED |
2287 | if (!fdst) { |
2288 | fdst = rdst; | |
2289 | continue; | |
2290 | } | |
afbd8bae MR |
2291 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2292 | if (skb1) | |
3ad7a4b1 | 2293 | vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc); |
6681712d DS |
2294 | } |
2295 | ||
8f646c92 | 2296 | if (fdst) |
3ad7a4b1 | 2297 | vxlan_xmit_one(skb, dev, vni, fdst, did_rsc); |
8f646c92 ED |
2298 | else |
2299 | kfree_skb(skb); | |
4ad16930 | 2300 | return NETDEV_TX_OK; |
6681712d DS |
2301 | } |
2302 | ||
d342894c | 2303 | /* Walk the forwarding table and purge stale entries */ |
2304 | static void vxlan_cleanup(unsigned long arg) | |
2305 | { | |
2306 | struct vxlan_dev *vxlan = (struct vxlan_dev *) arg; | |
2307 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; | |
2308 | unsigned int h; | |
2309 | ||
2310 | if (!netif_running(vxlan->dev)) | |
2311 | return; | |
2312 | ||
d342894c | 2313 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2314 | struct hlist_node *p, *n; | |
14e1d0fa SD |
2315 | |
2316 | spin_lock_bh(&vxlan->hash_lock); | |
d342894c | 2317 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2318 | struct vxlan_fdb *f | |
2319 | = container_of(p, struct vxlan_fdb, hlist); | |
2320 | unsigned long timeout; | |
2321 | ||
efb5f68f | 2322 | if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
d342894c | 2323 | continue; |
2324 | ||
0dfbdf41 | 2325 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2326 | if (time_before_eq(timeout, jiffies)) { |
2327 | netdev_dbg(vxlan->dev, | |
2328 | "garbage collect %pM\n", | |
2329 | f->eth_addr); | |
2330 | f->state = NUD_STALE; | |
2331 | vxlan_fdb_destroy(vxlan, f); | |
2332 | } else if (time_before(timeout, next_timer)) | |
2333 | next_timer = timeout; | |
2334 | } | |
14e1d0fa | 2335 | spin_unlock_bh(&vxlan->hash_lock); |
d342894c | 2336 | } |
d342894c | 2337 | |
2338 | mod_timer(&vxlan->age_timer, next_timer); | |
2339 | } | |
2340 | ||
9c2e24e1 PS |
2341 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan) |
2342 | { | |
56ef9c90 | 2343 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
54bfd872 | 2344 | __be32 vni = vxlan->default_dst.remote_vni; |
9c2e24e1 | 2345 | |
56ef9c90 | 2346 | spin_lock(&vn->sock_lock); |
9c2e24e1 | 2347 | hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni)); |
56ef9c90 | 2348 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
2349 | } |
2350 | ||
d342894c | 2351 | /* Setup stats when device is created */ |
2352 | static int vxlan_init(struct net_device *dev) | |
2353 | { | |
1c213bd2 | 2354 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2355 | if (!dev->tstats) |
d342894c | 2356 | return -ENOMEM; |
2357 | ||
2358 | return 0; | |
2359 | } | |
2360 | ||
3ad7a4b1 | 2361 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni) |
afbd8bae MR |
2362 | { |
2363 | struct vxlan_fdb *f; | |
2364 | ||
2365 | spin_lock_bh(&vxlan->hash_lock); | |
3ad7a4b1 | 2366 | f = __vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae MR |
2367 | if (f) |
2368 | vxlan_fdb_destroy(vxlan, f); | |
2369 | spin_unlock_bh(&vxlan->hash_lock); | |
2370 | } | |
2371 | ||
ebf4063e SH |
2372 | static void vxlan_uninit(struct net_device *dev) |
2373 | { | |
2374 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 2375 | |
3ad7a4b1 | 2376 | vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni); |
afbd8bae | 2377 | |
ebf4063e SH |
2378 | free_percpu(dev->tstats); |
2379 | } | |
2380 | ||
d342894c | 2381 | /* Start ageing timer and join group when device is brought up */ |
2382 | static int vxlan_open(struct net_device *dev) | |
2383 | { | |
2384 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
205f356d | 2385 | int ret; |
56ef9c90 | 2386 | |
205f356d JB |
2387 | ret = vxlan_sock_add(vxlan); |
2388 | if (ret < 0) | |
2389 | return ret; | |
d342894c | 2390 | |
79d4a94f | 2391 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 | 2392 | ret = vxlan_igmp_join(vxlan); |
bef0057b MRL |
2393 | if (ret == -EADDRINUSE) |
2394 | ret = 0; | |
56ef9c90 | 2395 | if (ret) { |
205f356d | 2396 | vxlan_sock_release(vxlan); |
56ef9c90 MRL |
2397 | return ret; |
2398 | } | |
d342894c | 2399 | } |
2400 | ||
0dfbdf41 | 2401 | if (vxlan->cfg.age_interval) |
d342894c | 2402 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
2403 | ||
56ef9c90 | 2404 | return ret; |
d342894c | 2405 | } |
2406 | ||
2407 | /* Purge the forwarding table */ | |
8b3f9337 | 2408 | static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all) |
d342894c | 2409 | { |
31fec5aa | 2410 | unsigned int h; |
d342894c | 2411 | |
2412 | spin_lock_bh(&vxlan->hash_lock); | |
2413 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2414 | struct hlist_node *p, *n; | |
2415 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2416 | struct vxlan_fdb *f | |
2417 | = container_of(p, struct vxlan_fdb, hlist); | |
8b3f9337 RP |
2418 | if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP))) |
2419 | continue; | |
afbd8bae MR |
2420 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2421 | if (!is_zero_ether_addr(f->eth_addr)) | |
2422 | vxlan_fdb_destroy(vxlan, f); | |
d342894c | 2423 | } |
2424 | } | |
2425 | spin_unlock_bh(&vxlan->hash_lock); | |
2426 | } | |
2427 | ||
2428 | /* Cleanup timer and forwarding table on shutdown */ | |
2429 | static int vxlan_stop(struct net_device *dev) | |
2430 | { | |
2431 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2432 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
56ef9c90 | 2433 | int ret = 0; |
d342894c | 2434 | |
24c0e683 | 2435 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 2436 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 2437 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 2438 | |
2439 | del_timer_sync(&vxlan->age_timer); | |
2440 | ||
8b3f9337 | 2441 | vxlan_flush(vxlan, false); |
205f356d | 2442 | vxlan_sock_release(vxlan); |
d342894c | 2443 | |
56ef9c90 | 2444 | return ret; |
d342894c | 2445 | } |
2446 | ||
d342894c | 2447 | /* Stub, nothing needs to be done. */ |
2448 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2449 | { | |
2450 | } | |
2451 | ||
91572088 | 2452 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
345010b5 | 2453 | { |
91572088 JW |
2454 | struct vxlan_dev *vxlan = netdev_priv(dev); |
2455 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2456 | struct net_device *lowerdev = __dev_get_by_index(vxlan->net, | |
2457 | dst->remote_ifindex); | |
2458 | bool use_ipv6 = false; | |
345010b5 DB |
2459 | |
2460 | if (dst->remote_ip.sa.sa_family == AF_INET6) | |
91572088 | 2461 | use_ipv6 = true; |
345010b5 | 2462 | |
91572088 JW |
2463 | /* This check is different than dev->max_mtu, because it looks at |
2464 | * the lowerdev->mtu, rather than the static dev->max_mtu | |
2465 | */ | |
2466 | if (lowerdev) { | |
2467 | int max_mtu = lowerdev->mtu - | |
2468 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); | |
2469 | if (new_mtu > max_mtu) | |
72564b59 | 2470 | return -EINVAL; |
72564b59 DW |
2471 | } |
2472 | ||
345010b5 DB |
2473 | dev->mtu = new_mtu; |
2474 | return 0; | |
2475 | } | |
2476 | ||
fc4099f1 PS |
2477 | static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
2478 | { | |
2479 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2480 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
2481 | __be16 sport, dport; | |
2482 | ||
2483 | sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, | |
2484 | vxlan->cfg.port_max, true); | |
2485 | dport = info->key.tp_dst ? : vxlan->cfg.dst_port; | |
2486 | ||
239e944f | 2487 | if (ip_tunnel_info_af(info) == AF_INET) { |
c6fcc4fc | 2488 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
1a8496ba JB |
2489 | struct rtable *rt; |
2490 | ||
655c3de1 | 2491 | rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos, |
1a8496ba | 2492 | info->key.u.ipv4.dst, |
22f0708a PA |
2493 | &info->key.u.ipv4.src, dport, sport, |
2494 | &info->dst_cache, info); | |
1a8496ba JB |
2495 | if (IS_ERR(rt)) |
2496 | return PTR_ERR(rt); | |
2497 | ip_rt_put(rt); | |
239e944f JB |
2498 | } else { |
2499 | #if IS_ENABLED(CONFIG_IPV6) | |
03dc52a8 | 2500 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
239e944f JB |
2501 | struct dst_entry *ndst; |
2502 | ||
655c3de1 | 2503 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos, |
e7f70af1 | 2504 | info->key.label, &info->key.u.ipv6.dst, |
22f0708a PA |
2505 | &info->key.u.ipv6.src, dport, sport, |
2506 | &info->dst_cache, info); | |
239e944f JB |
2507 | if (IS_ERR(ndst)) |
2508 | return PTR_ERR(ndst); | |
2509 | dst_release(ndst); | |
239e944f JB |
2510 | #else /* !CONFIG_IPV6 */ |
2511 | return -EPFNOSUPPORT; | |
2512 | #endif | |
2513 | } | |
1a8496ba JB |
2514 | info->key.tp_src = sport; |
2515 | info->key.tp_dst = dport; | |
239e944f | 2516 | return 0; |
fc4099f1 PS |
2517 | } |
2518 | ||
0c867c9b | 2519 | static const struct net_device_ops vxlan_netdev_ether_ops = { |
d342894c | 2520 | .ndo_init = vxlan_init, |
ebf4063e | 2521 | .ndo_uninit = vxlan_uninit, |
d342894c | 2522 | .ndo_open = vxlan_open, |
2523 | .ndo_stop = vxlan_stop, | |
2524 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2525 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2526 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2527 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2528 | .ndo_validate_addr = eth_validate_addr, |
2529 | .ndo_set_mac_address = eth_mac_addr, | |
2530 | .ndo_fdb_add = vxlan_fdb_add, | |
2531 | .ndo_fdb_del = vxlan_fdb_delete, | |
2532 | .ndo_fdb_dump = vxlan_fdb_dump, | |
fc4099f1 | 2533 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
d342894c | 2534 | }; |
2535 | ||
e1e5314d JB |
2536 | static const struct net_device_ops vxlan_netdev_raw_ops = { |
2537 | .ndo_init = vxlan_init, | |
2538 | .ndo_uninit = vxlan_uninit, | |
2539 | .ndo_open = vxlan_open, | |
2540 | .ndo_stop = vxlan_stop, | |
2541 | .ndo_start_xmit = vxlan_xmit, | |
2542 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
2543 | .ndo_change_mtu = vxlan_change_mtu, | |
2544 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, | |
2545 | }; | |
2546 | ||
d342894c | 2547 | /* Info for udev, that this is a virtual tunnel endpoint */ |
2548 | static struct device_type vxlan_type = { | |
2549 | .name = "vxlan", | |
2550 | }; | |
2551 | ||
e5de25dc | 2552 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
35e42379 | 2553 | * supply the listening VXLAN udp ports. Callers are expected |
e5de25dc | 2554 | * to implement the ndo_udp_tunnel_add. |
53cf5275 | 2555 | */ |
b7aade15 | 2556 | static void vxlan_push_rx_ports(struct net_device *dev) |
53cf5275 JG |
2557 | { |
2558 | struct vxlan_sock *vs; | |
2559 | struct net *net = dev_net(dev); | |
2560 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
35e42379 | 2561 | unsigned int i; |
53cf5275 JG |
2562 | |
2563 | spin_lock(&vn->sock_lock); | |
2564 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
e7b3db5e AD |
2565 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) |
2566 | udp_tunnel_push_rx_port(dev, vs->sock, | |
b9adcd69 AD |
2567 | (vs->flags & VXLAN_F_GPE) ? |
2568 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 2569 | UDP_TUNNEL_TYPE_VXLAN); |
53cf5275 JG |
2570 | } |
2571 | spin_unlock(&vn->sock_lock); | |
2572 | } | |
53cf5275 | 2573 | |
d342894c | 2574 | /* Initialize the device structure. */ |
2575 | static void vxlan_setup(struct net_device *dev) | |
2576 | { | |
2577 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2578 | unsigned int h; |
d342894c | 2579 | |
65226ef8 JB |
2580 | eth_hw_addr_random(dev); |
2581 | ether_setup(dev); | |
2582 | ||
ebf4063e | 2583 | dev->destructor = free_netdev; |
d342894c | 2584 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2585 | ||
d342894c | 2586 | dev->features |= NETIF_F_LLTX; |
d6727fe3 | 2587 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2588 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2589 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2590 | |
1eaa8178 | 2591 | dev->vlan_features = dev->features; |
0afb1666 | 2592 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2593 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
02875878 | 2594 | netif_keep_dst(dev); |
0c867c9b | 2595 | dev->priv_flags |= IFF_NO_QUEUE; |
d342894c | 2596 | |
553675fb | 2597 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2598 | spin_lock_init(&vxlan->hash_lock); |
2599 | ||
2600 | init_timer_deferrable(&vxlan->age_timer); | |
2601 | vxlan->age_timer.function = vxlan_cleanup; | |
2602 | vxlan->age_timer.data = (unsigned long) vxlan; | |
2603 | ||
0dfbdf41 | 2604 | vxlan->cfg.dst_port = htons(vxlan_port); |
05f47d69 | 2605 | |
d342894c | 2606 | vxlan->dev = dev; |
2607 | ||
58ce31cc TH |
2608 | gro_cells_init(&vxlan->gro_cells, dev); |
2609 | ||
d342894c | 2610 | for (h = 0; h < FDB_HASH_SIZE; ++h) |
2611 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2612 | } | |
2613 | ||
0c867c9b JB |
2614 | static void vxlan_ether_setup(struct net_device *dev) |
2615 | { | |
0c867c9b JB |
2616 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
2617 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
2618 | dev->netdev_ops = &vxlan_netdev_ether_ops; | |
2619 | } | |
2620 | ||
e1e5314d JB |
2621 | static void vxlan_raw_setup(struct net_device *dev) |
2622 | { | |
65226ef8 | 2623 | dev->header_ops = NULL; |
e1e5314d JB |
2624 | dev->type = ARPHRD_NONE; |
2625 | dev->hard_header_len = 0; | |
2626 | dev->addr_len = 0; | |
e1e5314d JB |
2627 | dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; |
2628 | dev->netdev_ops = &vxlan_netdev_raw_ops; | |
2629 | } | |
2630 | ||
d342894c | 2631 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { |
2632 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 2633 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 2634 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2635 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
2636 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 2637 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 2638 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
2639 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
e7f70af1 | 2640 | [IFLA_VXLAN_LABEL] = { .type = NLA_U32 }, |
d342894c | 2641 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, |
2642 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
2643 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 2644 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
2645 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
2646 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
2647 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
2648 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
f8a9b1bc | 2649 | [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
823aa873 | 2650 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
2651 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
2652 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
2653 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
2654 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
2655 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 2656 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
e1e5314d | 2657 | [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, }, |
0ace2ca8 | 2658 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
d342894c | 2659 | }; |
2660 | ||
2661 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
2662 | { | |
2663 | if (tb[IFLA_ADDRESS]) { | |
2664 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
2665 | pr_debug("invalid link address (not ethernet)\n"); | |
2666 | return -EINVAL; | |
2667 | } | |
2668 | ||
2669 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
2670 | pr_debug("invalid all zero ethernet address\n"); | |
2671 | return -EADDRNOTAVAIL; | |
2672 | } | |
2673 | } | |
2674 | ||
2675 | if (!data) | |
2676 | return -EINVAL; | |
2677 | ||
2678 | if (data[IFLA_VXLAN_ID]) { | |
2679 | __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); | |
4e37d691 | 2680 | if (id >= VXLAN_N_VID) |
d342894c | 2681 | return -ERANGE; |
2682 | } | |
2683 | ||
05f47d69 | 2684 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
2685 | const struct ifla_vxlan_port_range *p | |
2686 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
2687 | ||
2688 | if (ntohs(p->high) < ntohs(p->low)) { | |
2689 | pr_debug("port range %u .. %u not valid\n", | |
2690 | ntohs(p->low), ntohs(p->high)); | |
2691 | return -EINVAL; | |
2692 | } | |
2693 | } | |
2694 | ||
d342894c | 2695 | return 0; |
2696 | } | |
2697 | ||
1b13c97f YB |
2698 | static void vxlan_get_drvinfo(struct net_device *netdev, |
2699 | struct ethtool_drvinfo *drvinfo) | |
2700 | { | |
2701 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
2702 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
2703 | } | |
2704 | ||
2705 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
2706 | .get_drvinfo = vxlan_get_drvinfo, | |
2707 | .get_link = ethtool_op_get_link, | |
2708 | }; | |
2709 | ||
3ee64f39 TH |
2710 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
2711 | __be16 port, u32 flags) | |
553675fb | 2712 | { |
e4c7ed41 | 2713 | struct socket *sock; |
3ee64f39 TH |
2714 | struct udp_port_cfg udp_conf; |
2715 | int err; | |
e4c7ed41 | 2716 | |
3ee64f39 | 2717 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 2718 | |
3ee64f39 TH |
2719 | if (ipv6) { |
2720 | udp_conf.family = AF_INET6; | |
3ee64f39 | 2721 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 2722 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
a43a9ef6 | 2723 | udp_conf.ipv6_v6only = 1; |
3ee64f39 TH |
2724 | } else { |
2725 | udp_conf.family = AF_INET; | |
e4c7ed41 | 2726 | } |
e4c7ed41 | 2727 | |
3ee64f39 | 2728 | udp_conf.local_udp_port = port; |
553675fb | 2729 | |
3ee64f39 TH |
2730 | /* Open UDP socket */ |
2731 | err = udp_sock_create(net, &udp_conf, &sock); | |
2732 | if (err < 0) | |
2733 | return ERR_PTR(err); | |
e4c7ed41 | 2734 | |
39deb2c7 | 2735 | return sock; |
e4c7ed41 CW |
2736 | } |
2737 | ||
2738 | /* Create new listen socket if needed */ | |
b1be00a6 JB |
2739 | static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6, |
2740 | __be16 port, u32 flags) | |
e4c7ed41 CW |
2741 | { |
2742 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
2743 | struct vxlan_sock *vs; | |
2744 | struct socket *sock; | |
e4c7ed41 | 2745 | unsigned int h; |
acbf74a7 | 2746 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 2747 | |
dc01e7d3 | 2748 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
2749 | if (!vs) |
2750 | return ERR_PTR(-ENOMEM); | |
2751 | ||
2752 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
2753 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
2754 | ||
3ee64f39 | 2755 | sock = vxlan_create_sock(net, ipv6, port, flags); |
39deb2c7 | 2756 | if (IS_ERR(sock)) { |
56ef9c90 MRL |
2757 | pr_info("Cannot bind port %d, err=%ld\n", ntohs(port), |
2758 | PTR_ERR(sock)); | |
553675fb | 2759 | kfree(vs); |
e50fddc8 | 2760 | return ERR_CAST(sock); |
553675fb | 2761 | } |
e4c7ed41 CW |
2762 | |
2763 | vs->sock = sock; | |
9c2e24e1 | 2764 | atomic_set(&vs->refcnt, 1); |
af33c1ad | 2765 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 2766 | |
9c2e24e1 PS |
2767 | spin_lock(&vn->sock_lock); |
2768 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
e7b3db5e | 2769 | udp_tunnel_notify_add_rx_port(sock, |
b9adcd69 AD |
2770 | (vs->flags & VXLAN_F_GPE) ? |
2771 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 2772 | UDP_TUNNEL_TYPE_VXLAN); |
9c2e24e1 | 2773 | spin_unlock(&vn->sock_lock); |
553675fb | 2774 | |
2775 | /* Mark socket as an encapsulation socket. */ | |
5602c48c | 2776 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
acbf74a7 AZ |
2777 | tunnel_cfg.sk_user_data = vs; |
2778 | tunnel_cfg.encap_type = 1; | |
f2d1968e | 2779 | tunnel_cfg.encap_rcv = vxlan_rcv; |
acbf74a7 | 2780 | tunnel_cfg.encap_destroy = NULL; |
5602c48c TH |
2781 | tunnel_cfg.gro_receive = vxlan_gro_receive; |
2782 | tunnel_cfg.gro_complete = vxlan_gro_complete; | |
acbf74a7 AZ |
2783 | |
2784 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 2785 | |
9c2e24e1 PS |
2786 | return vs; |
2787 | } | |
2788 | ||
b1be00a6 | 2789 | static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6) |
9c2e24e1 | 2790 | { |
205f356d JB |
2791 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
2792 | struct vxlan_sock *vs = NULL; | |
9c2e24e1 | 2793 | |
205f356d | 2794 | if (!vxlan->cfg.no_share) { |
56ef9c90 | 2795 | spin_lock(&vn->sock_lock); |
205f356d JB |
2796 | vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
2797 | vxlan->cfg.dst_port, vxlan->flags); | |
2798 | if (vs && !atomic_add_unless(&vs->refcnt, 1, 0)) { | |
56ef9c90 | 2799 | spin_unlock(&vn->sock_lock); |
205f356d | 2800 | return -EBUSY; |
56ef9c90 MRL |
2801 | } |
2802 | spin_unlock(&vn->sock_lock); | |
2803 | } | |
205f356d | 2804 | if (!vs) |
b1be00a6 JB |
2805 | vs = vxlan_socket_create(vxlan->net, ipv6, |
2806 | vxlan->cfg.dst_port, vxlan->flags); | |
205f356d JB |
2807 | if (IS_ERR(vs)) |
2808 | return PTR_ERR(vs); | |
b1be00a6 JB |
2809 | #if IS_ENABLED(CONFIG_IPV6) |
2810 | if (ipv6) | |
c6fcc4fc | 2811 | rcu_assign_pointer(vxlan->vn6_sock, vs); |
b1be00a6 JB |
2812 | else |
2813 | #endif | |
c6fcc4fc | 2814 | rcu_assign_pointer(vxlan->vn4_sock, vs); |
205f356d JB |
2815 | vxlan_vs_add_dev(vs, vxlan); |
2816 | return 0; | |
553675fb | 2817 | } |
2818 | ||
b1be00a6 JB |
2819 | static int vxlan_sock_add(struct vxlan_dev *vxlan) |
2820 | { | |
2821 | bool ipv6 = vxlan->flags & VXLAN_F_IPV6; | |
2822 | bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA; | |
2823 | int ret = 0; | |
2824 | ||
c6fcc4fc | 2825 | RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
b1be00a6 | 2826 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 2827 | RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
b1be00a6 JB |
2828 | if (ipv6 || metadata) |
2829 | ret = __vxlan_sock_add(vxlan, true); | |
2830 | #endif | |
2831 | if (!ret && (!ipv6 || metadata)) | |
2832 | ret = __vxlan_sock_add(vxlan, false); | |
2833 | if (ret < 0) | |
2834 | vxlan_sock_release(vxlan); | |
2835 | return ret; | |
2836 | } | |
2837 | ||
0dfbdf41 | 2838 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
8bcdc4f3 RP |
2839 | struct vxlan_config *conf, |
2840 | bool changelink) | |
d342894c | 2841 | { |
33564bbb | 2842 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
07b9b37c | 2843 | struct vxlan_dev *vxlan = netdev_priv(dev), *tmp; |
c7995c43 | 2844 | struct vxlan_rdst *dst = &vxlan->default_dst; |
b1be00a6 | 2845 | unsigned short needed_headroom = ETH_HLEN; |
e4c7ed41 | 2846 | bool use_ipv6 = false; |
0dfbdf41 | 2847 | __be16 default_port = vxlan->cfg.dst_port; |
7e059158 | 2848 | struct net_device *lowerdev = NULL; |
d342894c | 2849 | |
8bcdc4f3 RP |
2850 | if (!changelink) { |
2851 | if (conf->flags & VXLAN_F_GPE) { | |
2852 | /* For now, allow GPE only together with | |
2853 | * COLLECT_METADATA. This can be relaxed later; in such | |
2854 | * case, the other side of the PtP link will have to be | |
2855 | * provided. | |
2856 | */ | |
2857 | if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) || | |
2858 | !(conf->flags & VXLAN_F_COLLECT_METADATA)) { | |
2859 | pr_info("unsupported combination of extensions\n"); | |
2860 | return -EINVAL; | |
2861 | } | |
2862 | vxlan_raw_setup(dev); | |
2863 | } else { | |
2864 | vxlan_ether_setup(dev); | |
3555621d | 2865 | } |
e1e5314d | 2866 | |
8bcdc4f3 RP |
2867 | /* MTU range: 68 - 65535 */ |
2868 | dev->min_mtu = ETH_MIN_MTU; | |
2869 | dev->max_mtu = ETH_MAX_MTU; | |
2870 | vxlan->net = src_net; | |
e1e5314d | 2871 | } |
0c867c9b | 2872 | |
0dfbdf41 | 2873 | dst->remote_vni = conf->vni; |
d342894c | 2874 | |
0dfbdf41 | 2875 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); |
d342894c | 2876 | |
0dfbdf41 TG |
2877 | /* Unless IPv6 is explicitly requested, assume IPv4 */ |
2878 | if (!dst->remote_ip.sa.sa_family) | |
2879 | dst->remote_ip.sa.sa_family = AF_INET; | |
e4c7ed41 | 2880 | |
0dfbdf41 | 2881 | if (dst->remote_ip.sa.sa_family == AF_INET6 || |
057ba29b JB |
2882 | vxlan->cfg.saddr.sa.sa_family == AF_INET6) { |
2883 | if (!IS_ENABLED(CONFIG_IPV6)) | |
2884 | return -EPFNOSUPPORT; | |
e4c7ed41 | 2885 | use_ipv6 = true; |
b1be00a6 | 2886 | vxlan->flags |= VXLAN_F_IPV6; |
057ba29b | 2887 | } |
d342894c | 2888 | |
e7f70af1 DB |
2889 | if (conf->label && !use_ipv6) { |
2890 | pr_info("label only supported in use with IPv6\n"); | |
2891 | return -EINVAL; | |
2892 | } | |
2893 | ||
8bcdc4f3 RP |
2894 | if (conf->remote_ifindex && |
2895 | conf->remote_ifindex != vxlan->cfg.remote_ifindex) { | |
7e059158 | 2896 | lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex); |
0dfbdf41 | 2897 | dst->remote_ifindex = conf->remote_ifindex; |
34e02aa1 | 2898 | |
2899 | if (!lowerdev) { | |
8bcdc4f3 RP |
2900 | pr_info("ifindex %d does not exist\n", |
2901 | dst->remote_ifindex); | |
34e02aa1 | 2902 | return -ENODEV; |
2903 | } | |
d342894c | 2904 | |
e4c7ed41 CW |
2905 | #if IS_ENABLED(CONFIG_IPV6) |
2906 | if (use_ipv6) { | |
2907 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
2908 | if (idev && idev->cnf.disable_ipv6) { | |
2909 | pr_info("IPv6 is disabled via sysctl\n"); | |
2910 | return -EPERM; | |
2911 | } | |
e4c7ed41 CW |
2912 | } |
2913 | #endif | |
2914 | ||
0dfbdf41 | 2915 | if (!conf->mtu) |
91572088 JW |
2916 | dev->mtu = lowerdev->mtu - |
2917 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); | |
1ba56fb4 | 2918 | |
b1be00a6 | 2919 | needed_headroom = lowerdev->hard_header_len; |
8bcdc4f3 RP |
2920 | } else if (!conf->remote_ifindex && |
2921 | vxlan_addr_multicast(&dst->remote_ip)) { | |
9b4cdd51 JB |
2922 | pr_info("multicast destination requires interface to be specified\n"); |
2923 | return -EINVAL; | |
9dc2ad10 | 2924 | } |
d342894c | 2925 | |
7e059158 | 2926 | if (conf->mtu) { |
91572088 JW |
2927 | int max_mtu = ETH_MAX_MTU; |
2928 | ||
2929 | if (lowerdev) | |
2930 | max_mtu = lowerdev->mtu; | |
2931 | ||
2932 | max_mtu -= (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); | |
2933 | ||
2934 | if (conf->mtu < dev->min_mtu || conf->mtu > dev->max_mtu) | |
2935 | return -EINVAL; | |
2936 | ||
2937 | dev->mtu = conf->mtu; | |
2938 | ||
2939 | if (conf->mtu > max_mtu) | |
2940 | dev->mtu = max_mtu; | |
7e059158 DW |
2941 | } |
2942 | ||
b1be00a6 JB |
2943 | if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) |
2944 | needed_headroom += VXLAN6_HEADROOM; | |
2945 | else | |
2946 | needed_headroom += VXLAN_HEADROOM; | |
2947 | dev->needed_headroom = needed_headroom; | |
2948 | ||
0dfbdf41 | 2949 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
e1e5314d JB |
2950 | if (!vxlan->cfg.dst_port) { |
2951 | if (conf->flags & VXLAN_F_GPE) | |
d5ff72d9 | 2952 | vxlan->cfg.dst_port = htons(4790); /* IANA VXLAN-GPE port */ |
e1e5314d JB |
2953 | else |
2954 | vxlan->cfg.dst_port = default_port; | |
2955 | } | |
0dfbdf41 TG |
2956 | vxlan->flags |= conf->flags; |
2957 | ||
2958 | if (!vxlan->cfg.age_interval) | |
2959 | vxlan->cfg.age_interval = FDB_AGE_DEFAULT; | |
2960 | ||
8bcdc4f3 RP |
2961 | if (changelink) |
2962 | return 0; | |
2963 | ||
07b9b37c ND |
2964 | list_for_each_entry(tmp, &vn->vxlan_list, next) { |
2965 | if (tmp->cfg.vni == conf->vni && | |
2966 | (tmp->default_dst.remote_ip.sa.sa_family == AF_INET6 || | |
2967 | tmp->cfg.saddr.sa.sa_family == AF_INET6) == use_ipv6 && | |
2968 | tmp->cfg.dst_port == vxlan->cfg.dst_port && | |
2969 | (tmp->flags & VXLAN_F_RCV_FLAGS) == | |
3555621d JB |
2970 | (vxlan->flags & VXLAN_F_RCV_FLAGS)) { |
2971 | pr_info("duplicate VNI %u\n", be32_to_cpu(conf->vni)); | |
2972 | return -EEXIST; | |
2973 | } | |
07b9b37c | 2974 | } |
0dfbdf41 | 2975 | |
0dfbdf41 TG |
2976 | return 0; |
2977 | } | |
2978 | ||
8bcdc4f3 RP |
2979 | static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[], |
2980 | struct net_device *dev, struct vxlan_config *conf, | |
2981 | bool changelink) | |
0dfbdf41 | 2982 | { |
8bcdc4f3 | 2983 | struct vxlan_dev *vxlan = netdev_priv(dev); |
0dfbdf41 | 2984 | |
8bcdc4f3 | 2985 | memset(conf, 0, sizeof(*conf)); |
e277de5f | 2986 | |
8bcdc4f3 RP |
2987 | /* if changelink operation, start with old existing cfg */ |
2988 | if (changelink) | |
2989 | memcpy(conf, &vxlan->cfg, sizeof(*conf)); | |
2990 | ||
2991 | if (data[IFLA_VXLAN_ID]) { | |
2992 | __be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); | |
2993 | ||
2994 | if (changelink && (vni != conf->vni)) | |
2995 | return -EOPNOTSUPP; | |
2996 | conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); | |
2997 | } | |
0dfbdf41 TG |
2998 | |
2999 | if (data[IFLA_VXLAN_GROUP]) { | |
8bcdc4f3 | 3000 | conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); |
0dfbdf41 TG |
3001 | } else if (data[IFLA_VXLAN_GROUP6]) { |
3002 | if (!IS_ENABLED(CONFIG_IPV6)) | |
3003 | return -EPFNOSUPPORT; | |
3004 | ||
8bcdc4f3 RP |
3005 | conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); |
3006 | conf->remote_ip.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
3007 | } |
3008 | ||
3009 | if (data[IFLA_VXLAN_LOCAL]) { | |
8bcdc4f3 RP |
3010 | conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); |
3011 | conf->saddr.sa.sa_family = AF_INET; | |
0dfbdf41 TG |
3012 | } else if (data[IFLA_VXLAN_LOCAL6]) { |
3013 | if (!IS_ENABLED(CONFIG_IPV6)) | |
3014 | return -EPFNOSUPPORT; | |
3015 | ||
3016 | /* TODO: respect scope id */ | |
8bcdc4f3 RP |
3017 | conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); |
3018 | conf->saddr.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
3019 | } |
3020 | ||
3021 | if (data[IFLA_VXLAN_LINK]) | |
8bcdc4f3 | 3022 | conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); |
0dfbdf41 | 3023 | |
d342894c | 3024 | if (data[IFLA_VXLAN_TOS]) |
8bcdc4f3 | 3025 | conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 3026 | |
afb97186 | 3027 | if (data[IFLA_VXLAN_TTL]) |
8bcdc4f3 | 3028 | conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 3029 | |
e7f70af1 | 3030 | if (data[IFLA_VXLAN_LABEL]) |
8bcdc4f3 | 3031 | conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) & |
e7f70af1 DB |
3032 | IPV6_FLOWLABEL_MASK; |
3033 | ||
8bcdc4f3 RP |
3034 | if (data[IFLA_VXLAN_LEARNING]) { |
3035 | if (nla_get_u8(data[IFLA_VXLAN_LEARNING])) { | |
3036 | conf->flags |= VXLAN_F_LEARN; | |
3037 | } else { | |
3038 | conf->flags &= ~VXLAN_F_LEARN; | |
3039 | vxlan->flags &= ~VXLAN_F_LEARN; | |
3040 | } | |
3041 | } else if (!changelink) { | |
3042 | /* default to learn on a new device */ | |
3043 | conf->flags |= VXLAN_F_LEARN; | |
3044 | } | |
d342894c | 3045 | |
8bcdc4f3 RP |
3046 | if (data[IFLA_VXLAN_AGEING]) { |
3047 | if (changelink) | |
3048 | return -EOPNOTSUPP; | |
3049 | conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); | |
3050 | } | |
d342894c | 3051 | |
8bcdc4f3 RP |
3052 | if (data[IFLA_VXLAN_PROXY]) { |
3053 | if (changelink) | |
3054 | return -EOPNOTSUPP; | |
3055 | if (nla_get_u8(data[IFLA_VXLAN_PROXY])) | |
3056 | conf->flags |= VXLAN_F_PROXY; | |
3057 | } | |
e4f67add | 3058 | |
8bcdc4f3 RP |
3059 | if (data[IFLA_VXLAN_RSC]) { |
3060 | if (changelink) | |
3061 | return -EOPNOTSUPP; | |
3062 | if (nla_get_u8(data[IFLA_VXLAN_RSC])) | |
3063 | conf->flags |= VXLAN_F_RSC; | |
3064 | } | |
e4f67add | 3065 | |
8bcdc4f3 RP |
3066 | if (data[IFLA_VXLAN_L2MISS]) { |
3067 | if (changelink) | |
3068 | return -EOPNOTSUPP; | |
3069 | if (nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
3070 | conf->flags |= VXLAN_F_L2MISS; | |
3071 | } | |
e4f67add | 3072 | |
8bcdc4f3 RP |
3073 | if (data[IFLA_VXLAN_L3MISS]) { |
3074 | if (changelink) | |
3075 | return -EOPNOTSUPP; | |
3076 | if (nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
3077 | conf->flags |= VXLAN_F_L3MISS; | |
3078 | } | |
e4f67add | 3079 | |
8bcdc4f3 RP |
3080 | if (data[IFLA_VXLAN_LIMIT]) { |
3081 | if (changelink) | |
3082 | return -EOPNOTSUPP; | |
3083 | conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
3084 | } | |
d342894c | 3085 | |
8bcdc4f3 RP |
3086 | if (data[IFLA_VXLAN_COLLECT_METADATA]) { |
3087 | if (changelink) | |
3088 | return -EOPNOTSUPP; | |
3089 | if (nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA])) | |
3090 | conf->flags |= VXLAN_F_COLLECT_METADATA; | |
3091 | } | |
f8a9b1bc | 3092 | |
05f47d69 | 3093 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
8bcdc4f3 RP |
3094 | if (!changelink) { |
3095 | const struct ifla_vxlan_port_range *p | |
3096 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
3097 | conf->port_min = ntohs(p->low); | |
3098 | conf->port_max = ntohs(p->high); | |
3099 | } else { | |
3100 | return -EOPNOTSUPP; | |
3101 | } | |
05f47d69 | 3102 | } |
3103 | ||
8bcdc4f3 RP |
3104 | if (data[IFLA_VXLAN_PORT]) { |
3105 | if (changelink) | |
3106 | return -EOPNOTSUPP; | |
3107 | conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
3108 | } | |
823aa873 | 3109 | |
8bcdc4f3 RP |
3110 | if (data[IFLA_VXLAN_UDP_CSUM]) { |
3111 | if (changelink) | |
3112 | return -EOPNOTSUPP; | |
3113 | if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) | |
3114 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX; | |
3115 | } | |
359a0ea9 | 3116 | |
8bcdc4f3 RP |
3117 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) { |
3118 | if (changelink) | |
3119 | return -EOPNOTSUPP; | |
3120 | if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
3121 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; | |
3122 | } | |
359a0ea9 | 3123 | |
8bcdc4f3 RP |
3124 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) { |
3125 | if (changelink) | |
3126 | return -EOPNOTSUPP; | |
3127 | if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
3128 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; | |
3129 | } | |
359a0ea9 | 3130 | |
8bcdc4f3 RP |
3131 | if (data[IFLA_VXLAN_REMCSUM_TX]) { |
3132 | if (changelink) | |
3133 | return -EOPNOTSUPP; | |
3134 | if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
3135 | conf->flags |= VXLAN_F_REMCSUM_TX; | |
3136 | } | |
dfd8645e | 3137 | |
8bcdc4f3 RP |
3138 | if (data[IFLA_VXLAN_REMCSUM_RX]) { |
3139 | if (changelink) | |
3140 | return -EOPNOTSUPP; | |
3141 | if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
3142 | conf->flags |= VXLAN_F_REMCSUM_RX; | |
3143 | } | |
3144 | ||
3145 | if (data[IFLA_VXLAN_GBP]) { | |
3146 | if (changelink) | |
3147 | return -EOPNOTSUPP; | |
3148 | conf->flags |= VXLAN_F_GBP; | |
3149 | } | |
3150 | ||
3151 | if (data[IFLA_VXLAN_GPE]) { | |
3152 | if (changelink) | |
3153 | return -EOPNOTSUPP; | |
3154 | conf->flags |= VXLAN_F_GPE; | |
3155 | } | |
3156 | ||
3157 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) { | |
3158 | if (changelink) | |
3159 | return -EOPNOTSUPP; | |
3160 | conf->flags |= VXLAN_F_REMCSUM_NOPARTIAL; | |
3161 | } | |
3162 | ||
3163 | if (tb[IFLA_MTU]) { | |
3164 | if (changelink) | |
3165 | return -EOPNOTSUPP; | |
3166 | conf->mtu = nla_get_u32(tb[IFLA_MTU]); | |
3167 | } | |
3168 | ||
3169 | return 0; | |
3170 | } | |
3171 | ||
3172 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
3173 | struct nlattr *tb[], struct nlattr *data[]) | |
3174 | { | |
3175 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); | |
3176 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3177 | struct vxlan_config conf; | |
3178 | int err; | |
3179 | ||
3180 | err = vxlan_nl2conf(tb, data, dev, &conf, false); | |
3181 | if (err) | |
3182 | return err; | |
3183 | ||
3184 | err = vxlan_dev_configure(src_net, dev, &conf, false); | |
3185 | if (err) | |
3186 | return err; | |
3187 | ||
3188 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
3189 | ||
3190 | /* create an fdb entry for a valid default destination */ | |
3191 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
3192 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
3193 | &vxlan->default_dst.remote_ip, | |
3194 | NUD_REACHABLE | NUD_PERMANENT, | |
3195 | NLM_F_EXCL | NLM_F_CREATE, | |
3196 | vxlan->cfg.dst_port, | |
3197 | vxlan->default_dst.remote_vni, | |
3198 | vxlan->default_dst.remote_vni, | |
3199 | vxlan->default_dst.remote_ifindex, | |
3200 | NTF_SELF); | |
3201 | if (err) | |
3202 | return err; | |
3203 | } | |
3204 | ||
3205 | err = register_netdevice(dev); | |
3206 | if (err) { | |
3207 | vxlan_fdb_delete_default(vxlan, vxlan->default_dst.remote_vni); | |
3208 | return err; | |
3209 | } | |
3210 | ||
3211 | list_add(&vxlan->next, &vn->vxlan_list); | |
3212 | ||
3213 | return 0; | |
3214 | } | |
dfd8645e | 3215 | |
8bcdc4f3 RP |
3216 | static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[], |
3217 | struct nlattr *data[]) | |
3218 | { | |
3219 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3220 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3221 | struct vxlan_rdst old_dst; | |
3222 | struct vxlan_config conf; | |
3223 | int err; | |
3224 | ||
3225 | err = vxlan_nl2conf(tb, data, | |
3226 | dev, &conf, true); | |
3227 | if (err) | |
3228 | return err; | |
3511494c | 3229 | |
8bcdc4f3 | 3230 | memcpy(&old_dst, dst, sizeof(struct vxlan_rdst)); |
e1e5314d | 3231 | |
8bcdc4f3 RP |
3232 | err = vxlan_dev_configure(vxlan->net, dev, &conf, true); |
3233 | if (err) | |
3234 | return err; | |
0ace2ca8 | 3235 | |
8bcdc4f3 RP |
3236 | /* handle default dst entry */ |
3237 | if (!vxlan_addr_equal(&dst->remote_ip, &old_dst.remote_ip)) { | |
3238 | spin_lock_bh(&vxlan->hash_lock); | |
3239 | if (!vxlan_addr_any(&old_dst.remote_ip)) | |
3240 | __vxlan_fdb_delete(vxlan, all_zeros_mac, | |
3241 | old_dst.remote_ip, | |
3242 | vxlan->cfg.dst_port, | |
3243 | old_dst.remote_vni, | |
3244 | old_dst.remote_vni, | |
3245 | old_dst.remote_ifindex, 0); | |
3246 | ||
3247 | if (!vxlan_addr_any(&dst->remote_ip)) { | |
3248 | err = vxlan_fdb_create(vxlan, all_zeros_mac, | |
3249 | &dst->remote_ip, | |
3250 | NUD_REACHABLE | NUD_PERMANENT, | |
3251 | NLM_F_CREATE | NLM_F_APPEND, | |
3252 | vxlan->cfg.dst_port, | |
3253 | dst->remote_vni, | |
3254 | dst->remote_vni, | |
3255 | dst->remote_ifindex, | |
3256 | NTF_SELF); | |
3257 | if (err) { | |
3258 | spin_unlock_bh(&vxlan->hash_lock); | |
3259 | return err; | |
3260 | } | |
3261 | } | |
3262 | spin_unlock_bh(&vxlan->hash_lock); | |
3263 | } | |
ce577668 | 3264 | |
8bcdc4f3 | 3265 | return 0; |
d342894c | 3266 | } |
3267 | ||
3268 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
3269 | { | |
3270 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 3271 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
d342894c | 3272 | |
8b3f9337 RP |
3273 | vxlan_flush(vxlan, true); |
3274 | ||
fe5c3561 | 3275 | spin_lock(&vn->sock_lock); |
9c2e24e1 PS |
3276 | if (!hlist_unhashed(&vxlan->hlist)) |
3277 | hlist_del_rcu(&vxlan->hlist); | |
fe5c3561 | 3278 | spin_unlock(&vn->sock_lock); |
3279 | ||
58ce31cc | 3280 | gro_cells_destroy(&vxlan->gro_cells); |
553675fb | 3281 | list_del(&vxlan->next); |
d342894c | 3282 | unregister_netdevice_queue(dev, head); |
3283 | } | |
3284 | ||
3285 | static size_t vxlan_get_size(const struct net_device *dev) | |
3286 | { | |
3287 | ||
3288 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 3289 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 3290 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 3291 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 3292 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
3293 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ | |
e7f70af1 | 3294 | nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */ |
d342894c | 3295 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ |
e4f67add DS |
3296 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
3297 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
3298 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
3299 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
da8b43c0 | 3300 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
d342894c | 3301 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
3302 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 3303 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
3304 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
3305 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
3306 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
3307 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
3308 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
3309 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 3310 | 0; |
3311 | } | |
3312 | ||
3313 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
3314 | { | |
3315 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 3316 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 3317 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
3318 | .low = htons(vxlan->cfg.port_min), |
3319 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 3320 | }; |
d342894c | 3321 | |
54bfd872 | 3322 | if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni))) |
d342894c | 3323 | goto nla_put_failure; |
3324 | ||
e4c7ed41 CW |
3325 | if (!vxlan_addr_any(&dst->remote_ip)) { |
3326 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
3327 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
3328 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
3329 | goto nla_put_failure; |
3330 | #if IS_ENABLED(CONFIG_IPV6) | |
3331 | } else { | |
930345ea JB |
3332 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
3333 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
3334 | goto nla_put_failure; |
3335 | #endif | |
3336 | } | |
3337 | } | |
d342894c | 3338 | |
c7995c43 | 3339 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 3340 | goto nla_put_failure; |
3341 | ||
0dfbdf41 TG |
3342 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
3343 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 3344 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 3345 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
3346 | goto nla_put_failure; |
3347 | #if IS_ENABLED(CONFIG_IPV6) | |
3348 | } else { | |
930345ea | 3349 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 3350 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
3351 | goto nla_put_failure; |
3352 | #endif | |
3353 | } | |
3354 | } | |
d342894c | 3355 | |
0dfbdf41 TG |
3356 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
3357 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || | |
e7f70af1 | 3358 | nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) || |
e4f67add DS |
3359 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
3360 | !!(vxlan->flags & VXLAN_F_LEARN)) || | |
3361 | nla_put_u8(skb, IFLA_VXLAN_PROXY, | |
3362 | !!(vxlan->flags & VXLAN_F_PROXY)) || | |
3363 | nla_put_u8(skb, IFLA_VXLAN_RSC, !!(vxlan->flags & VXLAN_F_RSC)) || | |
3364 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, | |
3365 | !!(vxlan->flags & VXLAN_F_L2MISS)) || | |
3366 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, | |
3367 | !!(vxlan->flags & VXLAN_F_L3MISS)) || | |
da8b43c0 AS |
3368 | nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
3369 | !!(vxlan->flags & VXLAN_F_COLLECT_METADATA)) || | |
0dfbdf41 TG |
3370 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
3371 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
3372 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 | 3373 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
6ceb31ca | 3374 | !(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM_TX)) || |
359a0ea9 TH |
3375 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
3376 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || | |
3377 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, | |
dfd8645e TH |
3378 | !!(vxlan->flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
3379 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, | |
3380 | !!(vxlan->flags & VXLAN_F_REMCSUM_TX)) || | |
3381 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, | |
3382 | !!(vxlan->flags & VXLAN_F_REMCSUM_RX))) | |
d342894c | 3383 | goto nla_put_failure; |
3384 | ||
05f47d69 | 3385 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
3386 | goto nla_put_failure; | |
3387 | ||
3511494c TG |
3388 | if (vxlan->flags & VXLAN_F_GBP && |
3389 | nla_put_flag(skb, IFLA_VXLAN_GBP)) | |
3390 | goto nla_put_failure; | |
3391 | ||
e1e5314d JB |
3392 | if (vxlan->flags & VXLAN_F_GPE && |
3393 | nla_put_flag(skb, IFLA_VXLAN_GPE)) | |
3394 | goto nla_put_failure; | |
3395 | ||
0ace2ca8 TH |
3396 | if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL && |
3397 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) | |
3398 | goto nla_put_failure; | |
3399 | ||
d342894c | 3400 | return 0; |
3401 | ||
3402 | nla_put_failure: | |
3403 | return -EMSGSIZE; | |
3404 | } | |
3405 | ||
1728d4fa ND |
3406 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
3407 | { | |
3408 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3409 | ||
3410 | return vxlan->net; | |
3411 | } | |
3412 | ||
d342894c | 3413 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
3414 | .kind = "vxlan", | |
3415 | .maxtype = IFLA_VXLAN_MAX, | |
3416 | .policy = vxlan_policy, | |
3417 | .priv_size = sizeof(struct vxlan_dev), | |
3418 | .setup = vxlan_setup, | |
3419 | .validate = vxlan_validate, | |
3420 | .newlink = vxlan_newlink, | |
8bcdc4f3 | 3421 | .changelink = vxlan_changelink, |
d342894c | 3422 | .dellink = vxlan_dellink, |
3423 | .get_size = vxlan_get_size, | |
3424 | .fill_info = vxlan_fill_info, | |
1728d4fa | 3425 | .get_link_net = vxlan_get_link_net, |
d342894c | 3426 | }; |
3427 | ||
cf5da330 ND |
3428 | struct net_device *vxlan_dev_create(struct net *net, const char *name, |
3429 | u8 name_assign_type, | |
3430 | struct vxlan_config *conf) | |
3431 | { | |
3432 | struct nlattr *tb[IFLA_MAX + 1]; | |
3433 | struct net_device *dev; | |
3434 | int err; | |
3435 | ||
3436 | memset(&tb, 0, sizeof(tb)); | |
3437 | ||
3438 | dev = rtnl_create_link(net, name, name_assign_type, | |
3439 | &vxlan_link_ops, tb); | |
3440 | if (IS_ERR(dev)) | |
3441 | return dev; | |
3442 | ||
8bcdc4f3 | 3443 | err = vxlan_dev_configure(net, dev, conf, false); |
cf5da330 ND |
3444 | if (err < 0) { |
3445 | free_netdev(dev); | |
3446 | return ERR_PTR(err); | |
3447 | } | |
3448 | ||
3449 | err = rtnl_configure_link(dev, NULL); | |
3450 | if (err < 0) { | |
3451 | LIST_HEAD(list_kill); | |
3452 | ||
3453 | vxlan_dellink(dev, &list_kill); | |
3454 | unregister_netdevice_many(&list_kill); | |
3455 | return ERR_PTR(err); | |
3456 | } | |
3457 | ||
3458 | return dev; | |
3459 | } | |
3460 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
3461 | ||
acaf4e70 DB |
3462 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
3463 | struct net_device *dev) | |
3464 | { | |
3465 | struct vxlan_dev *vxlan, *next; | |
3466 | LIST_HEAD(list_kill); | |
3467 | ||
3468 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3469 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3470 | ||
3471 | /* In case we created vxlan device with carrier | |
3472 | * and we loose the carrier due to module unload | |
3473 | * we also need to remove vxlan device. In other | |
3474 | * cases, it's not necessary and remote_ifindex | |
3475 | * is 0 here, so no matches. | |
3476 | */ | |
3477 | if (dst->remote_ifindex == dev->ifindex) | |
3478 | vxlan_dellink(vxlan->dev, &list_kill); | |
3479 | } | |
3480 | ||
3481 | unregister_netdevice_many(&list_kill); | |
3482 | } | |
3483 | ||
b7aade15 HFS |
3484 | static int vxlan_netdevice_event(struct notifier_block *unused, |
3485 | unsigned long event, void *ptr) | |
acaf4e70 DB |
3486 | { |
3487 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 3488 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 3489 | |
783c1463 | 3490 | if (event == NETDEV_UNREGISTER) |
acaf4e70 | 3491 | vxlan_handle_lowerdev_unregister(vn, dev); |
7c46a640 | 3492 | else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO) |
b7aade15 | 3493 | vxlan_push_rx_ports(dev); |
acaf4e70 DB |
3494 | |
3495 | return NOTIFY_DONE; | |
3496 | } | |
3497 | ||
3498 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
b7aade15 | 3499 | .notifier_call = vxlan_netdevice_event, |
acaf4e70 DB |
3500 | }; |
3501 | ||
d342894c | 3502 | static __net_init int vxlan_init_net(struct net *net) |
3503 | { | |
3504 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 3505 | unsigned int h; |
d342894c | 3506 | |
553675fb | 3507 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 3508 | spin_lock_init(&vn->sock_lock); |
d342894c | 3509 | |
553675fb | 3510 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
3511 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 3512 | |
3513 | return 0; | |
3514 | } | |
3515 | ||
f01ec1c0 ND |
3516 | static void __net_exit vxlan_exit_net(struct net *net) |
3517 | { | |
3518 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3519 | struct vxlan_dev *vxlan, *next; | |
3520 | struct net_device *dev, *aux; | |
3521 | LIST_HEAD(list); | |
3522 | ||
3523 | rtnl_lock(); | |
3524 | for_each_netdev_safe(net, dev, aux) | |
3525 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
3526 | unregister_netdevice_queue(dev, &list); | |
3527 | ||
3528 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
3529 | /* If vxlan->dev is in the same netns, it has already been added | |
3530 | * to the list by the previous loop. | |
3531 | */ | |
58ce31cc TH |
3532 | if (!net_eq(dev_net(vxlan->dev), net)) { |
3533 | gro_cells_destroy(&vxlan->gro_cells); | |
13c3ed6a | 3534 | unregister_netdevice_queue(vxlan->dev, &list); |
58ce31cc | 3535 | } |
f01ec1c0 ND |
3536 | } |
3537 | ||
3538 | unregister_netdevice_many(&list); | |
3539 | rtnl_unlock(); | |
3540 | } | |
3541 | ||
d342894c | 3542 | static struct pernet_operations vxlan_net_ops = { |
3543 | .init = vxlan_init_net, | |
f01ec1c0 | 3544 | .exit = vxlan_exit_net, |
d342894c | 3545 | .id = &vxlan_net_id, |
3546 | .size = sizeof(struct vxlan_net), | |
3547 | }; | |
3548 | ||
3549 | static int __init vxlan_init_module(void) | |
3550 | { | |
3551 | int rc; | |
3552 | ||
3553 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); | |
3554 | ||
783c1463 | 3555 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 3556 | if (rc) |
3557 | goto out1; | |
3558 | ||
acaf4e70 | 3559 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 3560 | if (rc) |
3561 | goto out2; | |
3562 | ||
acaf4e70 DB |
3563 | rc = rtnl_link_register(&vxlan_link_ops); |
3564 | if (rc) | |
3565 | goto out3; | |
d342894c | 3566 | |
acaf4e70 DB |
3567 | return 0; |
3568 | out3: | |
3569 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 3570 | out2: |
783c1463 | 3571 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 3572 | out1: |
3573 | return rc; | |
3574 | } | |
7332a13b | 3575 | late_initcall(vxlan_init_module); |
d342894c | 3576 | |
3577 | static void __exit vxlan_cleanup_module(void) | |
3578 | { | |
b7153984 | 3579 | rtnl_link_unregister(&vxlan_link_ops); |
acaf4e70 | 3580 | unregister_netdevice_notifier(&vxlan_notifier_block); |
783c1463 DB |
3581 | unregister_pernet_subsys(&vxlan_net_ops); |
3582 | /* rcu_barrier() is called by netns */ | |
d342894c | 3583 | } |
3584 | module_exit(vxlan_cleanup_module); | |
3585 | ||
3586 | MODULE_LICENSE("GPL"); | |
3587 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 3588 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 3589 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 3590 | MODULE_ALIAS_RTNL_LINK("vxlan"); |