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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> | |
fa20e0e3 | 29 | #include <net/tun_proto.h> |
012a5729 | 30 | #include <net/vxlan.h> |
40d29af0 | 31 | |
e4c7ed41 | 32 | #if IS_ENABLED(CONFIG_IPV6) |
e4c7ed41 | 33 | #include <net/ip6_tunnel.h> |
660d98ca | 34 | #include <net/ip6_checksum.h> |
e4c7ed41 | 35 | #endif |
d342894c | 36 | |
37 | #define VXLAN_VERSION "0.1" | |
38 | ||
553675fb | 39 | #define PORT_HASH_BITS 8 |
40 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 41 | #define FDB_AGE_DEFAULT 300 /* 5 min */ |
42 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
43 | ||
23c578bf | 44 | /* UDP port for VXLAN traffic. |
45 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 46 | * for compatibility with early adopters. |
23c578bf | 47 | */ |
9daaa397 SH |
48 | static unsigned short vxlan_port __read_mostly = 8472; |
49 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 50 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
51 | ||
52 | static bool log_ecn_error = true; | |
53 | module_param(log_ecn_error, bool, 0644); | |
54 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
55 | ||
c7d03a00 | 56 | static unsigned int vxlan_net_id; |
0dfbdf41 | 57 | static struct rtnl_link_ops vxlan_link_ops; |
553675fb | 58 | |
7256eac1 | 59 | static const u8 all_zeros_mac[ETH_ALEN + 2]; |
afbd8bae | 60 | |
205f356d | 61 | static int vxlan_sock_add(struct vxlan_dev *vxlan); |
614732ea | 62 | |
a53cb29b MB |
63 | static void vxlan_vs_del_dev(struct vxlan_dev *vxlan); |
64 | ||
553675fb | 65 | /* per-network namespace private data for this module */ |
66 | struct vxlan_net { | |
67 | struct list_head vxlan_list; | |
68 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 69 | spinlock_t sock_lock; |
553675fb | 70 | }; |
71 | ||
d342894c | 72 | /* Forwarding table entry */ |
73 | struct vxlan_fdb { | |
74 | struct hlist_node hlist; /* linked list of entries */ | |
75 | struct rcu_head rcu; | |
76 | unsigned long updated; /* jiffies */ | |
77 | unsigned long used; | |
3e61aa8f | 78 | struct list_head remotes; |
7177a3b0 | 79 | u8 eth_addr[ETH_ALEN]; |
d342894c | 80 | u16 state; /* see ndm_state */ |
3ad7a4b1 | 81 | __be32 vni; |
45598c1c | 82 | u16 flags; /* see ndm_flags and below */ |
d342894c | 83 | }; |
84 | ||
45598c1c PM |
85 | #define NTF_VXLAN_ADDED_BY_USER 0x100 |
86 | ||
d342894c | 87 | /* salt for hash table */ |
88 | static u32 vxlan_salt __read_mostly; | |
89 | ||
ee122c79 TG |
90 | static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
91 | { | |
e7030878 TG |
92 | return vs->flags & VXLAN_F_COLLECT_METADATA || |
93 | ip_tunnel_collect_metadata(); | |
ee122c79 TG |
94 | } |
95 | ||
e4c7ed41 CW |
96 | #if IS_ENABLED(CONFIG_IPV6) |
97 | static inline | |
98 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
99 | { | |
f0ef3126 JB |
100 | if (a->sa.sa_family != b->sa.sa_family) |
101 | return false; | |
102 | if (a->sa.sa_family == AF_INET6) | |
103 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
104 | else | |
105 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
e4c7ed41 CW |
106 | } |
107 | ||
e4c7ed41 CW |
108 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) |
109 | { | |
f0ef3126 | 110 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
67b61f6c | 111 | ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
f0ef3126 JB |
112 | ip->sa.sa_family = AF_INET6; |
113 | return 0; | |
114 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 115 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
116 | ip->sa.sa_family = AF_INET; |
117 | return 0; | |
118 | } else { | |
119 | return -EAFNOSUPPORT; | |
120 | } | |
e4c7ed41 CW |
121 | } |
122 | ||
123 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 124 | const union vxlan_addr *ip) |
e4c7ed41 | 125 | { |
f0ef3126 | 126 | if (ip->sa.sa_family == AF_INET6) |
930345ea | 127 | return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
f0ef3126 | 128 | else |
930345ea | 129 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
130 | } |
131 | ||
132 | #else /* !CONFIG_IPV6 */ | |
133 | ||
134 | static inline | |
135 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
136 | { | |
f0ef3126 | 137 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
e4c7ed41 CW |
138 | } |
139 | ||
e4c7ed41 CW |
140 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) |
141 | { | |
f0ef3126 JB |
142 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
143 | return -EAFNOSUPPORT; | |
144 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 145 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
146 | ip->sa.sa_family = AF_INET; |
147 | return 0; | |
148 | } else { | |
149 | return -EAFNOSUPPORT; | |
150 | } | |
e4c7ed41 CW |
151 | } |
152 | ||
153 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 154 | const union vxlan_addr *ip) |
e4c7ed41 | 155 | { |
930345ea | 156 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
157 | } |
158 | #endif | |
159 | ||
553675fb | 160 | /* Virtual Network hash table head */ |
54bfd872 | 161 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni) |
553675fb | 162 | { |
54bfd872 | 163 | return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)]; |
553675fb | 164 | } |
165 | ||
166 | /* Socket hash table head */ | |
167 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 168 | { |
169 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
170 | ||
553675fb | 171 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
172 | } | |
173 | ||
3e61aa8f SH |
174 | /* First remote destination for a forwarding entry. |
175 | * Guaranteed to be non-NULL because remotes are never deleted. | |
176 | */ | |
5ca5461c | 177 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 178 | { |
5ca5461c | 179 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
180 | } | |
181 | ||
182 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
183 | { | |
184 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); | |
3e61aa8f SH |
185 | } |
186 | ||
ac5132d1 TG |
187 | /* Find VXLAN socket based on network namespace, address family and UDP port |
188 | * and enabled unshareable flags. | |
189 | */ | |
190 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
aab8cc36 | 191 | __be16 port, u32 flags, int ifindex) |
553675fb | 192 | { |
193 | struct vxlan_sock *vs; | |
af33c1ad TH |
194 | |
195 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 196 | |
197 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 198 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
705cc62f | 199 | vxlan_get_sk_family(vs) == family && |
aab8cc36 AB |
200 | vs->flags == flags && |
201 | vs->sock->sk->sk_bound_dev_if == ifindex) | |
553675fb | 202 | return vs; |
203 | } | |
204 | return NULL; | |
d342894c | 205 | } |
206 | ||
49f810f0 MS |
207 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, int ifindex, |
208 | __be32 vni) | |
d342894c | 209 | { |
69e76661 | 210 | struct vxlan_dev_node *node; |
d342894c | 211 | |
b9167b2e JB |
212 | /* For flow based devices, map all packets to VNI 0 */ |
213 | if (vs->flags & VXLAN_F_COLLECT_METADATA) | |
214 | vni = 0; | |
215 | ||
69e76661 JB |
216 | hlist_for_each_entry_rcu(node, vni_head(vs, vni), hlist) { |
217 | if (node->vxlan->default_dst.remote_vni != vni) | |
49f810f0 MS |
218 | continue; |
219 | ||
220 | if (IS_ENABLED(CONFIG_IPV6)) { | |
69e76661 | 221 | const struct vxlan_config *cfg = &node->vxlan->cfg; |
49f810f0 MS |
222 | |
223 | if ((cfg->flags & VXLAN_F_IPV6_LINKLOCAL) && | |
224 | cfg->remote_ifindex != ifindex) | |
225 | continue; | |
226 | } | |
227 | ||
69e76661 | 228 | return node->vxlan; |
d342894c | 229 | } |
230 | ||
231 | return NULL; | |
232 | } | |
233 | ||
5cfccc5a | 234 | /* Look up VNI in a per net namespace table */ |
49f810f0 MS |
235 | static struct vxlan_dev *vxlan_find_vni(struct net *net, int ifindex, |
236 | __be32 vni, sa_family_t family, | |
237 | __be16 port, u32 flags) | |
5cfccc5a PS |
238 | { |
239 | struct vxlan_sock *vs; | |
240 | ||
aab8cc36 | 241 | vs = vxlan_find_sock(net, family, port, flags, ifindex); |
5cfccc5a PS |
242 | if (!vs) |
243 | return NULL; | |
244 | ||
49f810f0 | 245 | return vxlan_vs_find_vni(vs, ifindex, vni); |
5cfccc5a PS |
246 | } |
247 | ||
d342894c | 248 | /* Fill in neighbour message in skbuff. */ |
249 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
250 | const struct vxlan_fdb *fdb, |
251 | u32 portid, u32 seq, int type, unsigned int flags, | |
252 | const struct vxlan_rdst *rdst) | |
d342894c | 253 | { |
254 | unsigned long now = jiffies; | |
255 | struct nda_cacheinfo ci; | |
256 | struct nlmsghdr *nlh; | |
257 | struct ndmsg *ndm; | |
e4f67add | 258 | bool send_ip, send_eth; |
d342894c | 259 | |
260 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
261 | if (nlh == NULL) | |
262 | return -EMSGSIZE; | |
263 | ||
264 | ndm = nlmsg_data(nlh); | |
265 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
266 | |
267 | send_eth = send_ip = true; | |
268 | ||
269 | if (type == RTM_GETNEIGH) { | |
e4c7ed41 | 270 | send_ip = !vxlan_addr_any(&rdst->remote_ip); |
e4f67add | 271 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
8f48ba71 | 272 | ndm->ndm_family = send_ip ? rdst->remote_ip.sa.sa_family : AF_INET; |
e4f67add DS |
273 | } else |
274 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 275 | ndm->ndm_state = fdb->state; |
276 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 277 | ndm->ndm_flags = fdb->flags; |
0efe1173 PM |
278 | if (rdst->offloaded) |
279 | ndm->ndm_flags |= NTF_OFFLOADED; | |
545469f7 | 280 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 281 | |
193523bf | 282 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 283 | nla_put_s32(skb, NDA_LINK_NETNSID, |
38f507f1 | 284 | peernet2id(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
285 | goto nla_put_failure; |
286 | ||
e4f67add | 287 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 288 | goto nla_put_failure; |
289 | ||
e4c7ed41 | 290 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, &rdst->remote_ip)) |
6681712d DS |
291 | goto nla_put_failure; |
292 | ||
0dfbdf41 | 293 | if (rdst->remote_port && rdst->remote_port != vxlan->cfg.dst_port && |
6681712d DS |
294 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) |
295 | goto nla_put_failure; | |
c7995c43 | 296 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && |
54bfd872 | 297 | nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni))) |
6681712d | 298 | goto nla_put_failure; |
dc5321d7 | 299 | if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && fdb->vni && |
3ad7a4b1 RP |
300 | nla_put_u32(skb, NDA_SRC_VNI, |
301 | be32_to_cpu(fdb->vni))) | |
302 | goto nla_put_failure; | |
6681712d DS |
303 | if (rdst->remote_ifindex && |
304 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
d342894c | 305 | goto nla_put_failure; |
306 | ||
307 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
308 | ci.ndm_confirmed = 0; | |
309 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
310 | ci.ndm_refcnt = 0; | |
311 | ||
312 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
313 | goto nla_put_failure; | |
314 | ||
053c095a JB |
315 | nlmsg_end(skb, nlh); |
316 | return 0; | |
d342894c | 317 | |
318 | nla_put_failure: | |
319 | nlmsg_cancel(skb, nlh); | |
320 | return -EMSGSIZE; | |
321 | } | |
322 | ||
323 | static inline size_t vxlan_nlmsg_size(void) | |
324 | { | |
325 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
326 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 327 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 328 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
329 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
330 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 331 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 332 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
333 | } | |
334 | ||
9a997353 PM |
335 | static void __vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
336 | struct vxlan_rdst *rd, int type) | |
d342894c | 337 | { |
338 | struct net *net = dev_net(vxlan->dev); | |
339 | struct sk_buff *skb; | |
340 | int err = -ENOBUFS; | |
341 | ||
342 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
343 | if (skb == NULL) | |
344 | goto errout; | |
345 | ||
9e4b93f9 | 346 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 347 | if (err < 0) { |
348 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
349 | WARN_ON(err == -EMSGSIZE); | |
350 | kfree_skb(skb); | |
351 | goto errout; | |
352 | } | |
353 | ||
354 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
355 | return; | |
356 | errout: | |
357 | if (err < 0) | |
358 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
359 | } | |
360 | ||
ff23b91c PM |
361 | static void vxlan_fdb_switchdev_notifier_info(const struct vxlan_dev *vxlan, |
362 | const struct vxlan_fdb *fdb, | |
363 | const struct vxlan_rdst *rd, | |
364 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
365 | { | |
366 | fdb_info->info.dev = vxlan->dev; | |
479c86dc | 367 | fdb_info->info.extack = NULL; |
ff23b91c PM |
368 | fdb_info->remote_ip = rd->remote_ip; |
369 | fdb_info->remote_port = rd->remote_port; | |
370 | fdb_info->remote_vni = rd->remote_vni; | |
371 | fdb_info->remote_ifindex = rd->remote_ifindex; | |
372 | memcpy(fdb_info->eth_addr, fdb->eth_addr, ETH_ALEN); | |
373 | fdb_info->vni = fdb->vni; | |
374 | fdb_info->offloaded = rd->offloaded; | |
375 | fdb_info->added_by_user = fdb->flags & NTF_VXLAN_ADDED_BY_USER; | |
376 | } | |
377 | ||
61f46fe8 PM |
378 | static int vxlan_fdb_switchdev_call_notifiers(struct vxlan_dev *vxlan, |
379 | struct vxlan_fdb *fdb, | |
380 | struct vxlan_rdst *rd, | |
381 | bool adding) | |
9a997353 PM |
382 | { |
383 | struct switchdev_notifier_vxlan_fdb_info info; | |
384 | enum switchdev_notifier_type notifier_type; | |
61f46fe8 | 385 | int ret; |
9a997353 PM |
386 | |
387 | if (WARN_ON(!rd)) | |
61f46fe8 | 388 | return 0; |
9a997353 PM |
389 | |
390 | notifier_type = adding ? SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE | |
391 | : SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE; | |
ff23b91c | 392 | vxlan_fdb_switchdev_notifier_info(vxlan, fdb, rd, &info); |
61f46fe8 PM |
393 | ret = call_switchdev_notifiers(notifier_type, vxlan->dev, |
394 | &info.info); | |
395 | return notifier_to_errno(ret); | |
9a997353 PM |
396 | } |
397 | ||
61f46fe8 PM |
398 | static int vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
399 | struct vxlan_rdst *rd, int type, bool swdev_notify) | |
9a997353 | 400 | { |
61f46fe8 PM |
401 | int err; |
402 | ||
0e6160f3 PM |
403 | if (swdev_notify) { |
404 | switch (type) { | |
405 | case RTM_NEWNEIGH: | |
61f46fe8 PM |
406 | err = vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd, |
407 | true); | |
408 | if (err) | |
409 | return err; | |
0e6160f3 PM |
410 | break; |
411 | case RTM_DELNEIGH: | |
412 | vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd, | |
413 | false); | |
414 | break; | |
415 | } | |
9a997353 PM |
416 | } |
417 | ||
418 | __vxlan_fdb_notify(vxlan, fdb, rd, type); | |
61f46fe8 | 419 | return 0; |
9a997353 PM |
420 | } |
421 | ||
e4c7ed41 | 422 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
423 | { |
424 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
425 | struct vxlan_fdb f = { |
426 | .state = NUD_STALE, | |
427 | }; | |
428 | struct vxlan_rdst remote = { | |
e4c7ed41 | 429 | .remote_ip = *ipa, /* goes to NDA_DST */ |
54bfd872 | 430 | .remote_vni = cpu_to_be32(VXLAN_N_VID), |
bb3fd687 | 431 | }; |
3e61aa8f | 432 | |
0e6160f3 | 433 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true); |
e4f67add DS |
434 | } |
435 | ||
436 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
437 | { | |
bb3fd687 SH |
438 | struct vxlan_fdb f = { |
439 | .state = NUD_STALE, | |
440 | }; | |
9e4b93f9 | 441 | struct vxlan_rdst remote = { }; |
e4f67add | 442 | |
e4f67add DS |
443 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
444 | ||
0e6160f3 | 445 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true); |
e4f67add DS |
446 | } |
447 | ||
d342894c | 448 | /* Hash Ethernet address */ |
449 | static u32 eth_hash(const unsigned char *addr) | |
450 | { | |
451 | u64 value = get_unaligned((u64 *)addr); | |
452 | ||
453 | /* only want 6 bytes */ | |
454 | #ifdef __BIG_ENDIAN | |
d342894c | 455 | value >>= 16; |
321fb991 | 456 | #else |
457 | value <<= 16; | |
d342894c | 458 | #endif |
459 | return hash_64(value, FDB_HASH_BITS); | |
460 | } | |
461 | ||
3ad7a4b1 RP |
462 | static u32 eth_vni_hash(const unsigned char *addr, __be32 vni) |
463 | { | |
464 | /* use 1 byte of OUI and 3 bytes of NIC */ | |
465 | u32 key = get_unaligned((u32 *)(addr + 2)); | |
466 | ||
467 | return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1); | |
468 | } | |
469 | ||
d342894c | 470 | /* Hash chain to use given mac address */ |
471 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
3ad7a4b1 | 472 | const u8 *mac, __be32 vni) |
d342894c | 473 | { |
dc5321d7 | 474 | if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) |
3ad7a4b1 RP |
475 | return &vxlan->fdb_head[eth_vni_hash(mac, vni)]; |
476 | else | |
477 | return &vxlan->fdb_head[eth_hash(mac)]; | |
d342894c | 478 | } |
479 | ||
480 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 481 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 482 | const u8 *mac, __be32 vni) |
d342894c | 483 | { |
3ad7a4b1 | 484 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni); |
d342894c | 485 | struct vxlan_fdb *f; |
d342894c | 486 | |
b67bfe0d | 487 | hlist_for_each_entry_rcu(f, head, hlist) { |
3ad7a4b1 | 488 | if (ether_addr_equal(mac, f->eth_addr)) { |
dc5321d7 | 489 | if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) { |
3ad7a4b1 RP |
490 | if (vni == f->vni) |
491 | return f; | |
492 | } else { | |
493 | return f; | |
494 | } | |
495 | } | |
d342894c | 496 | } |
497 | ||
498 | return NULL; | |
499 | } | |
500 | ||
014be2c8 | 501 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 502 | const u8 *mac, __be32 vni) |
014be2c8 SS |
503 | { |
504 | struct vxlan_fdb *f; | |
505 | ||
3ad7a4b1 | 506 | f = __vxlan_find_mac(vxlan, mac, vni); |
016f3d18 | 507 | if (f && f->used != jiffies) |
014be2c8 SS |
508 | f->used = jiffies; |
509 | ||
510 | return f; | |
511 | } | |
512 | ||
a5e7c10a MR |
513 | /* caller should hold vxlan->hash_lock */ |
514 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 515 | union vxlan_addr *ip, __be16 port, |
54bfd872 | 516 | __be32 vni, __u32 ifindex) |
6681712d | 517 | { |
3e61aa8f | 518 | struct vxlan_rdst *rd; |
6681712d | 519 | |
3e61aa8f | 520 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 521 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
522 | rd->remote_port == port && |
523 | rd->remote_vni == vni && | |
524 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 525 | return rd; |
6681712d | 526 | } |
3e61aa8f | 527 | |
a5e7c10a MR |
528 | return NULL; |
529 | } | |
530 | ||
1941f1d6 PM |
531 | int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, |
532 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
533 | { | |
534 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
535 | u8 eth_addr[ETH_ALEN + 2] = { 0 }; | |
536 | struct vxlan_rdst *rdst; | |
537 | struct vxlan_fdb *f; | |
538 | int rc = 0; | |
539 | ||
540 | if (is_multicast_ether_addr(mac) || | |
541 | is_zero_ether_addr(mac)) | |
542 | return -EINVAL; | |
543 | ||
544 | ether_addr_copy(eth_addr, mac); | |
545 | ||
546 | rcu_read_lock(); | |
547 | ||
548 | f = __vxlan_find_mac(vxlan, eth_addr, vni); | |
549 | if (!f) { | |
550 | rc = -ENOENT; | |
551 | goto out; | |
552 | } | |
553 | ||
554 | rdst = first_remote_rcu(f); | |
ff23b91c | 555 | vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, fdb_info); |
1941f1d6 PM |
556 | |
557 | out: | |
558 | rcu_read_unlock(); | |
559 | return rc; | |
560 | } | |
561 | EXPORT_SYMBOL_GPL(vxlan_fdb_find_uc); | |
562 | ||
4f89f5b5 PM |
563 | static int vxlan_fdb_notify_one(struct notifier_block *nb, |
564 | const struct vxlan_dev *vxlan, | |
565 | const struct vxlan_fdb *f, | |
566 | const struct vxlan_rdst *rdst) | |
567 | { | |
568 | struct switchdev_notifier_vxlan_fdb_info fdb_info; | |
569 | int rc; | |
570 | ||
571 | vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, &fdb_info); | |
572 | rc = nb->notifier_call(nb, SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE, | |
573 | &fdb_info); | |
574 | return notifier_to_errno(rc); | |
575 | } | |
576 | ||
577 | int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, | |
578 | struct notifier_block *nb) | |
579 | { | |
580 | struct vxlan_dev *vxlan; | |
581 | struct vxlan_rdst *rdst; | |
582 | struct vxlan_fdb *f; | |
583 | unsigned int h; | |
584 | int rc = 0; | |
585 | ||
586 | if (!netif_is_vxlan(dev)) | |
587 | return -EINVAL; | |
588 | vxlan = netdev_priv(dev); | |
589 | ||
590 | spin_lock_bh(&vxlan->hash_lock); | |
591 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
592 | hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist) { | |
593 | if (f->vni == vni) { | |
594 | list_for_each_entry(rdst, &f->remotes, list) { | |
595 | rc = vxlan_fdb_notify_one(nb, vxlan, | |
596 | f, rdst); | |
597 | if (rc) | |
598 | goto out; | |
599 | } | |
600 | } | |
601 | } | |
602 | } | |
603 | ||
604 | out: | |
605 | spin_unlock_bh(&vxlan->hash_lock); | |
606 | return rc; | |
607 | } | |
608 | EXPORT_SYMBOL_GPL(vxlan_fdb_replay); | |
609 | ||
e5ff4b19 PM |
610 | void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni) |
611 | { | |
612 | struct vxlan_dev *vxlan; | |
613 | struct vxlan_rdst *rdst; | |
614 | struct vxlan_fdb *f; | |
615 | unsigned int h; | |
616 | ||
617 | if (!netif_is_vxlan(dev)) | |
618 | return; | |
619 | vxlan = netdev_priv(dev); | |
620 | ||
621 | spin_lock_bh(&vxlan->hash_lock); | |
622 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
623 | hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist) | |
624 | if (f->vni == vni) | |
625 | list_for_each_entry(rdst, &f->remotes, list) | |
626 | rdst->offloaded = false; | |
627 | } | |
628 | spin_unlock_bh(&vxlan->hash_lock); | |
629 | } | |
630 | EXPORT_SYMBOL_GPL(vxlan_fdb_clear_offload); | |
631 | ||
906dc186 TR |
632 | /* Replace destination of unicast mac */ |
633 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
54bfd872 | 634 | union vxlan_addr *ip, __be16 port, __be32 vni, |
ccdfd4f7 | 635 | __u32 ifindex, struct vxlan_rdst *oldrd) |
906dc186 TR |
636 | { |
637 | struct vxlan_rdst *rd; | |
638 | ||
639 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
640 | if (rd) | |
641 | return 0; | |
642 | ||
643 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
644 | if (!rd) | |
645 | return 0; | |
0c1d70af | 646 | |
ccdfd4f7 | 647 | *oldrd = *rd; |
0c1d70af | 648 | dst_cache_reset(&rd->dst_cache); |
e4c7ed41 | 649 | rd->remote_ip = *ip; |
906dc186 TR |
650 | rd->remote_port = port; |
651 | rd->remote_vni = vni; | |
652 | rd->remote_ifindex = ifindex; | |
6ad0b5a4 | 653 | rd->offloaded = false; |
906dc186 TR |
654 | return 1; |
655 | } | |
656 | ||
a5e7c10a MR |
657 | /* Add/update destinations for multicast */ |
658 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
54bfd872 | 659 | union vxlan_addr *ip, __be16 port, __be32 vni, |
9e4b93f9 | 660 | __u32 ifindex, struct vxlan_rdst **rdp) |
a5e7c10a MR |
661 | { |
662 | struct vxlan_rdst *rd; | |
663 | ||
664 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
665 | if (rd) | |
666 | return 0; | |
667 | ||
6681712d DS |
668 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
669 | if (rd == NULL) | |
670 | return -ENOBUFS; | |
0c1d70af PA |
671 | |
672 | if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) { | |
673 | kfree(rd); | |
674 | return -ENOBUFS; | |
675 | } | |
676 | ||
e4c7ed41 | 677 | rd->remote_ip = *ip; |
6681712d | 678 | rd->remote_port = port; |
0efe1173 | 679 | rd->offloaded = false; |
6681712d DS |
680 | rd->remote_vni = vni; |
681 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
682 | |
683 | list_add_tail_rcu(&rd->list, &f->remotes); | |
684 | ||
9e4b93f9 | 685 | *rdp = rd; |
6681712d DS |
686 | return 1; |
687 | } | |
688 | ||
dfd8645e TH |
689 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
690 | unsigned int off, | |
691 | struct vxlanhdr *vh, size_t hdrlen, | |
54bfd872 JB |
692 | __be32 vni_field, |
693 | struct gro_remcsum *grc, | |
0ace2ca8 | 694 | bool nopartial) |
dfd8645e | 695 | { |
b7fe10e5 | 696 | size_t start, offset; |
dfd8645e TH |
697 | |
698 | if (skb->remcsum_offload) | |
b7fe10e5 | 699 | return vh; |
dfd8645e TH |
700 | |
701 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
702 | return NULL; | |
703 | ||
54bfd872 JB |
704 | start = vxlan_rco_start(vni_field); |
705 | offset = start + vxlan_rco_offset(vni_field); | |
dfd8645e | 706 | |
b7fe10e5 TH |
707 | vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
708 | start, offset, grc, nopartial); | |
dfd8645e TH |
709 | |
710 | skb->remcsum_offload = 1; | |
711 | ||
712 | return vh; | |
713 | } | |
714 | ||
d4546c25 DM |
715 | static struct sk_buff *vxlan_gro_receive(struct sock *sk, |
716 | struct list_head *head, | |
717 | struct sk_buff *skb) | |
dc01e7d3 | 718 | { |
d4546c25 DM |
719 | struct sk_buff *pp = NULL; |
720 | struct sk_buff *p; | |
dc01e7d3 | 721 | struct vxlanhdr *vh, *vh2; |
9b174d88 | 722 | unsigned int hlen, off_vx; |
dc01e7d3 | 723 | int flush = 1; |
5602c48c | 724 | struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk); |
54bfd872 | 725 | __be32 flags; |
26c4f7da TH |
726 | struct gro_remcsum grc; |
727 | ||
728 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
729 | |
730 | off_vx = skb_gro_offset(skb); | |
731 | hlen = off_vx + sizeof(*vh); | |
732 | vh = skb_gro_header_fast(skb, off_vx); | |
733 | if (skb_gro_header_hard(skb, hlen)) { | |
734 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
735 | if (unlikely(!vh)) | |
736 | goto out; | |
737 | } | |
dc01e7d3 | 738 | |
dfd8645e TH |
739 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
740 | ||
54bfd872 | 741 | flags = vh->vx_flags; |
dfd8645e TH |
742 | |
743 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
744 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
54bfd872 | 745 | vh->vx_vni, &grc, |
0ace2ca8 TH |
746 | !!(vs->flags & |
747 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
748 | |
749 | if (!vh) | |
750 | goto out; | |
751 | } | |
752 | ||
b7fe10e5 TH |
753 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
754 | ||
d4546c25 | 755 | list_for_each_entry(p, head, list) { |
dc01e7d3 OG |
756 | if (!NAPI_GRO_CB(p)->same_flow) |
757 | continue; | |
758 | ||
759 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
760 | if (vh->vx_flags != vh2->vx_flags || |
761 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
762 | NAPI_GRO_CB(p)->same_flow = 0; |
763 | continue; | |
764 | } | |
dc01e7d3 OG |
765 | } |
766 | ||
fcd91dd4 | 767 | pp = call_gro_receive(eth_gro_receive, head, skb); |
c194cf93 | 768 | flush = 0; |
dc01e7d3 | 769 | |
dc01e7d3 | 770 | out: |
603d4cf8 | 771 | skb_gro_flush_final_remcsum(skb, pp, flush, &grc); |
dc01e7d3 OG |
772 | |
773 | return pp; | |
774 | } | |
775 | ||
5602c48c | 776 | static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff) |
dc01e7d3 | 777 | { |
229740c6 JR |
778 | /* Sets 'skb->inner_mac_header' since we are always called with |
779 | * 'skb->encapsulation' set. | |
780 | */ | |
9b174d88 | 781 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
782 | } |
783 | ||
25e20e73 RP |
784 | static struct vxlan_fdb *vxlan_fdb_alloc(struct vxlan_dev *vxlan, |
785 | const u8 *mac, __u16 state, | |
45598c1c | 786 | __be32 src_vni, __u16 ndm_flags) |
25e20e73 RP |
787 | { |
788 | struct vxlan_fdb *f; | |
789 | ||
790 | f = kmalloc(sizeof(*f), GFP_ATOMIC); | |
791 | if (!f) | |
792 | return NULL; | |
793 | f->state = state; | |
794 | f->flags = ndm_flags; | |
795 | f->updated = f->used = jiffies; | |
796 | f->vni = src_vni; | |
797 | INIT_LIST_HEAD(&f->remotes); | |
798 | memcpy(f->eth_addr, mac, ETH_ALEN); | |
799 | ||
800 | return f; | |
801 | } | |
802 | ||
d342894c | 803 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, |
25e20e73 RP |
804 | const u8 *mac, union vxlan_addr *ip, |
805 | __u16 state, __be16 port, __be32 src_vni, | |
45598c1c | 806 | __be32 vni, __u32 ifindex, __u16 ndm_flags, |
25e20e73 RP |
807 | struct vxlan_fdb **fdb) |
808 | { | |
809 | struct vxlan_rdst *rd = NULL; | |
810 | struct vxlan_fdb *f; | |
811 | int rc; | |
812 | ||
813 | if (vxlan->cfg.addrmax && | |
814 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
815 | return -ENOSPC; | |
816 | ||
817 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); | |
818 | f = vxlan_fdb_alloc(vxlan, mac, state, src_vni, ndm_flags); | |
819 | if (!f) | |
820 | return -ENOMEM; | |
821 | ||
822 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); | |
823 | if (rc < 0) { | |
824 | kfree(f); | |
825 | return rc; | |
826 | } | |
827 | ||
828 | ++vxlan->addrcnt; | |
829 | hlist_add_head_rcu(&f->hlist, | |
830 | vxlan_fdb_head(vxlan, mac, src_vni)); | |
831 | ||
832 | *fdb = f; | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
c2b200e0 PM |
837 | static void vxlan_fdb_free(struct rcu_head *head) |
838 | { | |
839 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
840 | struct vxlan_rdst *rd, *nd; | |
841 | ||
842 | list_for_each_entry_safe(rd, nd, &f->remotes, list) { | |
843 | dst_cache_destroy(&rd->dst_cache); | |
844 | kfree(rd); | |
845 | } | |
846 | kfree(f); | |
847 | } | |
848 | ||
849 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f, | |
850 | bool do_notify, bool swdev_notify) | |
851 | { | |
852 | struct vxlan_rdst *rd; | |
853 | ||
854 | netdev_dbg(vxlan->dev, "delete %pM\n", f->eth_addr); | |
855 | ||
856 | --vxlan->addrcnt; | |
857 | if (do_notify) | |
858 | list_for_each_entry(rd, &f->remotes, list) | |
859 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH, | |
860 | swdev_notify); | |
861 | ||
862 | hlist_del_rcu(&f->hlist); | |
863 | call_rcu(&f->rcu, vxlan_fdb_free); | |
864 | } | |
865 | ||
a76d1ca2 PM |
866 | static int vxlan_fdb_update_existing(struct vxlan_dev *vxlan, |
867 | union vxlan_addr *ip, | |
868 | __u16 state, __u16 flags, | |
869 | __be16 port, __be32 vni, | |
870 | __u32 ifindex, __u16 ndm_flags, | |
871 | struct vxlan_fdb *f, | |
872 | bool swdev_notify) | |
d342894c | 873 | { |
45598c1c | 874 | __u16 fdb_flags = (ndm_flags & ~NTF_USE); |
9e4b93f9 | 875 | struct vxlan_rdst *rd = NULL; |
ccdfd4f7 | 876 | struct vxlan_rdst oldrd; |
d342894c | 877 | int notify = 0; |
61f46fe8 PM |
878 | int rc = 0; |
879 | int err; | |
d342894c | 880 | |
a76d1ca2 PM |
881 | /* Do not allow an externally learned entry to take over an entry added |
882 | * by the user. | |
883 | */ | |
884 | if (!(fdb_flags & NTF_EXT_LEARNED) || | |
885 | !(f->flags & NTF_VXLAN_ADDED_BY_USER)) { | |
886 | if (f->state != state) { | |
887 | f->state = state; | |
888 | f->updated = jiffies; | |
889 | notify = 1; | |
ae884082 | 890 | } |
a76d1ca2 PM |
891 | if (f->flags != fdb_flags) { |
892 | f->flags = fdb_flags; | |
893 | f->updated = jiffies; | |
894 | notify = 1; | |
906dc186 | 895 | } |
a76d1ca2 | 896 | } |
6681712d | 897 | |
a76d1ca2 PM |
898 | if ((flags & NLM_F_REPLACE)) { |
899 | /* Only change unicasts */ | |
900 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
901 | is_zero_ether_addr(f->eth_addr))) { | |
902 | rc = vxlan_fdb_replace(f, ip, port, vni, | |
ccdfd4f7 | 903 | ifindex, &oldrd); |
6681712d | 904 | notify |= rc; |
a76d1ca2 | 905 | } else { |
906dc186 | 906 | return -EOPNOTSUPP; |
a76d1ca2 PM |
907 | } |
908 | } | |
909 | if ((flags & NLM_F_APPEND) && | |
910 | (is_multicast_ether_addr(f->eth_addr) || | |
911 | is_zero_ether_addr(f->eth_addr))) { | |
912 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); | |
906dc186 | 913 | |
25e20e73 | 914 | if (rc < 0) |
17b46365 | 915 | return rc; |
a76d1ca2 | 916 | notify |= rc; |
d342894c | 917 | } |
918 | ||
a76d1ca2 PM |
919 | if (ndm_flags & NTF_USE) |
920 | f->used = jiffies; | |
921 | ||
9e4b93f9 ND |
922 | if (notify) { |
923 | if (rd == NULL) | |
924 | rd = first_remote_rtnl(f); | |
a76d1ca2 | 925 | |
61f46fe8 PM |
926 | err = vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH, |
927 | swdev_notify); | |
928 | if (err) | |
929 | goto err_notify; | |
9e4b93f9 | 930 | } |
d342894c | 931 | |
932 | return 0; | |
61f46fe8 PM |
933 | |
934 | err_notify: | |
935 | if ((flags & NLM_F_REPLACE) && rc) | |
936 | *rd = oldrd; | |
937 | else if ((flags & NLM_F_APPEND) && rc) | |
938 | list_del_rcu(&rd->list); | |
939 | return err; | |
d342894c | 940 | } |
941 | ||
a76d1ca2 PM |
942 | static int vxlan_fdb_update_create(struct vxlan_dev *vxlan, |
943 | const u8 *mac, union vxlan_addr *ip, | |
944 | __u16 state, __u16 flags, | |
945 | __be16 port, __be32 src_vni, __be32 vni, | |
946 | __u32 ifindex, __u16 ndm_flags, | |
947 | bool swdev_notify) | |
948 | { | |
949 | __u16 fdb_flags = (ndm_flags & ~NTF_USE); | |
950 | struct vxlan_fdb *f; | |
951 | int rc; | |
952 | ||
953 | /* Disallow replace to add a multicast entry */ | |
954 | if ((flags & NLM_F_REPLACE) && | |
955 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
956 | return -EOPNOTSUPP; | |
957 | ||
958 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); | |
959 | rc = vxlan_fdb_create(vxlan, mac, ip, state, port, src_vni, | |
960 | vni, ifindex, fdb_flags, &f); | |
961 | if (rc < 0) | |
962 | return rc; | |
963 | ||
61f46fe8 PM |
964 | rc = vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_NEWNEIGH, |
965 | swdev_notify); | |
966 | if (rc) | |
967 | goto err_notify; | |
968 | ||
a76d1ca2 | 969 | return 0; |
61f46fe8 PM |
970 | |
971 | err_notify: | |
972 | vxlan_fdb_destroy(vxlan, f, false, false); | |
973 | return rc; | |
a76d1ca2 PM |
974 | } |
975 | ||
976 | /* Add new entry to forwarding table -- assumes lock held */ | |
977 | static int vxlan_fdb_update(struct vxlan_dev *vxlan, | |
978 | const u8 *mac, union vxlan_addr *ip, | |
979 | __u16 state, __u16 flags, | |
980 | __be16 port, __be32 src_vni, __be32 vni, | |
981 | __u32 ifindex, __u16 ndm_flags, | |
982 | bool swdev_notify) | |
983 | { | |
984 | struct vxlan_fdb *f; | |
985 | ||
986 | f = __vxlan_find_mac(vxlan, mac, src_vni); | |
987 | if (f) { | |
988 | if (flags & NLM_F_EXCL) { | |
989 | netdev_dbg(vxlan->dev, | |
990 | "lost race to create %pM\n", mac); | |
991 | return -EEXIST; | |
992 | } | |
993 | ||
994 | return vxlan_fdb_update_existing(vxlan, ip, state, flags, port, | |
995 | vni, ifindex, ndm_flags, f, | |
996 | swdev_notify); | |
997 | } else { | |
998 | if (!(flags & NLM_F_CREATE)) | |
999 | return -ENOENT; | |
1000 | ||
1001 | return vxlan_fdb_update_create(vxlan, mac, ip, state, flags, | |
1002 | port, src_vni, vni, ifindex, | |
1003 | ndm_flags, swdev_notify); | |
1004 | } | |
1005 | } | |
1006 | ||
35cf2845 LR |
1007 | static void vxlan_dst_free(struct rcu_head *head) |
1008 | { | |
1009 | struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); | |
1010 | ||
1011 | dst_cache_destroy(&rd->dst_cache); | |
1012 | kfree(rd); | |
1013 | } | |
1014 | ||
1015 | static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f, | |
0e6160f3 | 1016 | struct vxlan_rdst *rd, bool swdev_notify) |
35cf2845 LR |
1017 | { |
1018 | list_del_rcu(&rd->list); | |
0e6160f3 | 1019 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH, swdev_notify); |
35cf2845 LR |
1020 | call_rcu(&rd->rcu, vxlan_dst_free); |
1021 | } | |
1022 | ||
f0b074be | 1023 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
3ad7a4b1 RP |
1024 | union vxlan_addr *ip, __be16 *port, __be32 *src_vni, |
1025 | __be32 *vni, u32 *ifindex) | |
d342894c | 1026 | { |
6681712d | 1027 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 1028 | int err; |
d342894c | 1029 | |
f0b074be | 1030 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
1031 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
1032 | if (err) | |
1033 | return err; | |
f0b074be | 1034 | } else { |
e4c7ed41 CW |
1035 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
1036 | if (remote->sa.sa_family == AF_INET) { | |
1037 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
1038 | ip->sa.sa_family = AF_INET; | |
1039 | #if IS_ENABLED(CONFIG_IPV6) | |
1040 | } else { | |
1041 | ip->sin6.sin6_addr = in6addr_any; | |
1042 | ip->sa.sa_family = AF_INET6; | |
1043 | #endif | |
1044 | } | |
f0b074be | 1045 | } |
d342894c | 1046 | |
6681712d | 1047 | if (tb[NDA_PORT]) { |
73cf3317 | 1048 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 1049 | return -EINVAL; |
f0b074be MR |
1050 | *port = nla_get_be16(tb[NDA_PORT]); |
1051 | } else { | |
0dfbdf41 | 1052 | *port = vxlan->cfg.dst_port; |
f0b074be | 1053 | } |
6681712d DS |
1054 | |
1055 | if (tb[NDA_VNI]) { | |
1056 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
1057 | return -EINVAL; | |
54bfd872 | 1058 | *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); |
f0b074be MR |
1059 | } else { |
1060 | *vni = vxlan->default_dst.remote_vni; | |
1061 | } | |
6681712d | 1062 | |
3ad7a4b1 RP |
1063 | if (tb[NDA_SRC_VNI]) { |
1064 | if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32)) | |
1065 | return -EINVAL; | |
1066 | *src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI])); | |
1067 | } else { | |
1068 | *src_vni = vxlan->default_dst.remote_vni; | |
1069 | } | |
1070 | ||
6681712d | 1071 | if (tb[NDA_IFINDEX]) { |
5abb0029 | 1072 | struct net_device *tdev; |
6681712d DS |
1073 | |
1074 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
1075 | return -EINVAL; | |
f0b074be | 1076 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 1077 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 1078 | if (!tdev) |
6681712d | 1079 | return -EADDRNOTAVAIL; |
f0b074be MR |
1080 | } else { |
1081 | *ifindex = 0; | |
1082 | } | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | /* Add static entry (via netlink) */ | |
1088 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
1089 | struct net_device *dev, | |
f6f6424b | 1090 | const unsigned char *addr, u16 vid, u16 flags) |
f0b074be MR |
1091 | { |
1092 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1093 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 1094 | union vxlan_addr ip; |
f0b074be | 1095 | __be16 port; |
3ad7a4b1 | 1096 | __be32 src_vni, vni; |
54bfd872 | 1097 | u32 ifindex; |
f0b074be MR |
1098 | int err; |
1099 | ||
1100 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
1101 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
1102 | ndm->ndm_state); | |
1103 | return -EINVAL; | |
1104 | } | |
1105 | ||
1106 | if (tb[NDA_DST] == NULL) | |
1107 | return -EINVAL; | |
1108 | ||
3ad7a4b1 | 1109 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex); |
f0b074be MR |
1110 | if (err) |
1111 | return err; | |
6681712d | 1112 | |
5933a7bb MR |
1113 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
1114 | return -EAFNOSUPPORT; | |
1115 | ||
d342894c | 1116 | spin_lock_bh(&vxlan->hash_lock); |
25e20e73 | 1117 | err = vxlan_fdb_update(vxlan, addr, &ip, ndm->ndm_state, flags, |
45598c1c PM |
1118 | port, src_vni, vni, ifindex, |
1119 | ndm->ndm_flags | NTF_VXLAN_ADDED_BY_USER, | |
0e6160f3 | 1120 | true); |
d342894c | 1121 | spin_unlock_bh(&vxlan->hash_lock); |
1122 | ||
1123 | return err; | |
1124 | } | |
1125 | ||
3ad7a4b1 RP |
1126 | static int __vxlan_fdb_delete(struct vxlan_dev *vxlan, |
1127 | const unsigned char *addr, union vxlan_addr ip, | |
fc39c38b | 1128 | __be16 port, __be32 src_vni, __be32 vni, |
0e6160f3 | 1129 | u32 ifindex, bool swdev_notify) |
d342894c | 1130 | { |
d342894c | 1131 | struct vxlan_fdb *f; |
bc7892ba | 1132 | struct vxlan_rdst *rd = NULL; |
3ad7a4b1 | 1133 | int err = -ENOENT; |
bc7892ba | 1134 | |
3ad7a4b1 | 1135 | f = vxlan_find_mac(vxlan, addr, src_vni); |
bc7892ba | 1136 | if (!f) |
3ad7a4b1 | 1137 | return err; |
bc7892ba | 1138 | |
e4c7ed41 CW |
1139 | if (!vxlan_addr_any(&ip)) { |
1140 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
1141 | if (!rd) |
1142 | goto out; | |
1143 | } | |
1144 | ||
bc7892ba MR |
1145 | /* remove a destination if it's not the only one on the list, |
1146 | * otherwise destroy the fdb entry | |
1147 | */ | |
1148 | if (rd && !list_is_singular(&f->remotes)) { | |
0e6160f3 | 1149 | vxlan_fdb_dst_destroy(vxlan, f, rd, swdev_notify); |
bc7892ba | 1150 | goto out; |
d342894c | 1151 | } |
bc7892ba | 1152 | |
0e6160f3 | 1153 | vxlan_fdb_destroy(vxlan, f, true, swdev_notify); |
bc7892ba MR |
1154 | |
1155 | out: | |
3ad7a4b1 RP |
1156 | return 0; |
1157 | } | |
1158 | ||
1159 | /* Delete entry (via netlink) */ | |
1160 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], | |
1161 | struct net_device *dev, | |
1162 | const unsigned char *addr, u16 vid) | |
1163 | { | |
1164 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1165 | union vxlan_addr ip; | |
1166 | __be32 src_vni, vni; | |
1167 | __be16 port; | |
1168 | u32 ifindex; | |
1169 | int err; | |
1170 | ||
1171 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex); | |
1172 | if (err) | |
1173 | return err; | |
1174 | ||
1175 | spin_lock_bh(&vxlan->hash_lock); | |
0e6160f3 PM |
1176 | err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex, |
1177 | true); | |
d342894c | 1178 | spin_unlock_bh(&vxlan->hash_lock); |
1179 | ||
1180 | return err; | |
1181 | } | |
1182 | ||
1183 | /* Dump forwarding table */ | |
1184 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 | 1185 | struct net_device *dev, |
d297653d | 1186 | struct net_device *filter_dev, int *idx) |
d342894c | 1187 | { |
1188 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1189 | unsigned int h; | |
d297653d | 1190 | int err = 0; |
d342894c | 1191 | |
1192 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1193 | struct vxlan_fdb *f; | |
d342894c | 1194 | |
b67bfe0d | 1195 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 1196 | struct vxlan_rdst *rd; |
6681712d | 1197 | |
3e61aa8f | 1198 | list_for_each_entry_rcu(rd, &f->remotes, list) { |
d297653d | 1199 | if (*idx < cb->args[2]) |
07a51cd3 AW |
1200 | goto skip; |
1201 | ||
6681712d DS |
1202 | err = vxlan_fdb_info(skb, vxlan, f, |
1203 | NETLINK_CB(cb->skb).portid, | |
1204 | cb->nlh->nlmsg_seq, | |
1205 | RTM_NEWNEIGH, | |
1206 | NLM_F_MULTI, rd); | |
d297653d | 1207 | if (err < 0) |
3e61aa8f | 1208 | goto out; |
3e61aa8f | 1209 | skip: |
d297653d | 1210 | *idx += 1; |
07a51cd3 | 1211 | } |
d342894c | 1212 | } |
1213 | } | |
3e61aa8f | 1214 | out: |
d297653d | 1215 | return err; |
d342894c | 1216 | } |
1217 | ||
474c3c89 RP |
1218 | static int vxlan_fdb_get(struct sk_buff *skb, |
1219 | struct nlattr *tb[], | |
1220 | struct net_device *dev, | |
1221 | const unsigned char *addr, | |
1222 | u16 vid, u32 portid, u32 seq, | |
1223 | struct netlink_ext_ack *extack) | |
1224 | { | |
1225 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1226 | struct vxlan_fdb *f; | |
1227 | __be32 vni; | |
1228 | int err; | |
1229 | ||
1230 | if (tb[NDA_VNI]) | |
1231 | vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); | |
1232 | else | |
1233 | vni = vxlan->default_dst.remote_vni; | |
1234 | ||
1235 | rcu_read_lock(); | |
1236 | ||
1237 | f = __vxlan_find_mac(vxlan, addr, vni); | |
1238 | if (!f) { | |
1239 | NL_SET_ERR_MSG(extack, "Fdb entry not found"); | |
1240 | err = -ENOENT; | |
1241 | goto errout; | |
1242 | } | |
1243 | ||
1244 | err = vxlan_fdb_info(skb, vxlan, f, portid, seq, | |
1245 | RTM_NEWNEIGH, 0, first_remote_rcu(f)); | |
1246 | errout: | |
1247 | rcu_read_unlock(); | |
1248 | return err; | |
1249 | } | |
1250 | ||
d342894c | 1251 | /* Watch incoming packets to learn mapping between Ethernet address |
1252 | * and Tunnel endpoint. | |
c4b49512 | 1253 | * Return true if packet is bogus and should be dropped. |
d342894c | 1254 | */ |
26a41ae6 | 1255 | static bool vxlan_snoop(struct net_device *dev, |
3ad7a4b1 | 1256 | union vxlan_addr *src_ip, const u8 *src_mac, |
87613de9 | 1257 | u32 src_ifindex, __be32 vni) |
d342894c | 1258 | { |
1259 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1260 | struct vxlan_fdb *f; | |
87613de9 MS |
1261 | u32 ifindex = 0; |
1262 | ||
1263 | #if IS_ENABLED(CONFIG_IPV6) | |
1264 | if (src_ip->sa.sa_family == AF_INET6 && | |
1265 | (ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL)) | |
1266 | ifindex = src_ifindex; | |
1267 | #endif | |
d342894c | 1268 | |
3ad7a4b1 | 1269 | f = vxlan_find_mac(vxlan, src_mac, vni); |
d342894c | 1270 | if (likely(f)) { |
5ca5461c | 1271 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 1272 | |
87613de9 MS |
1273 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) && |
1274 | rdst->remote_ifindex == ifindex)) | |
26a41ae6 | 1275 | return false; |
1276 | ||
1277 | /* Don't migrate static entries, drop packets */ | |
e0090a9e | 1278 | if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
26a41ae6 | 1279 | return true; |
d342894c | 1280 | |
1281 | if (net_ratelimit()) | |
1282 | netdev_info(dev, | |
e4c7ed41 | 1283 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 1284 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 1285 | |
e4c7ed41 | 1286 | rdst->remote_ip = *src_ip; |
d342894c | 1287 | f->updated = jiffies; |
0e6160f3 | 1288 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH, true); |
d342894c | 1289 | } else { |
1290 | /* learned new entry */ | |
1291 | spin_lock(&vxlan->hash_lock); | |
3bf74b1a | 1292 | |
1293 | /* close off race between vxlan_flush and incoming packets */ | |
1294 | if (netif_running(dev)) | |
25e20e73 | 1295 | vxlan_fdb_update(vxlan, src_mac, src_ip, |
3bf74b1a | 1296 | NUD_REACHABLE, |
1297 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 1298 | vxlan->cfg.dst_port, |
3ad7a4b1 | 1299 | vni, |
3bf74b1a | 1300 | vxlan->default_dst.remote_vni, |
0e6160f3 | 1301 | ifindex, NTF_SELF, true); |
d342894c | 1302 | spin_unlock(&vxlan->hash_lock); |
1303 | } | |
26a41ae6 | 1304 | |
1305 | return false; | |
d342894c | 1306 | } |
1307 | ||
d342894c | 1308 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1309 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1310 | { |
553675fb | 1311 | struct vxlan_dev *vxlan; |
c6fcc4fc | 1312 | struct vxlan_sock *sock4; |
4053ab1b AB |
1313 | #if IS_ENABLED(CONFIG_IPV6) |
1314 | struct vxlan_sock *sock6; | |
1315 | #endif | |
b1be00a6 | 1316 | unsigned short family = dev->default_dst.remote_ip.sa.sa_family; |
d342894c | 1317 | |
c6fcc4fc | 1318 | sock4 = rtnl_dereference(dev->vn4_sock); |
1319 | ||
95ab0991 G |
1320 | /* The vxlan_sock is only used by dev, leaving group has |
1321 | * no effect on other vxlan devices. | |
1322 | */ | |
66af846f | 1323 | if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1) |
95ab0991 | 1324 | return false; |
b1be00a6 | 1325 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1326 | sock6 = rtnl_dereference(dev->vn6_sock); |
66af846f | 1327 | if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1) |
b1be00a6 JB |
1328 | return false; |
1329 | #endif | |
95ab0991 | 1330 | |
553675fb | 1331 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1332 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1333 | continue; |
d342894c | 1334 | |
c6fcc4fc | 1335 | if (family == AF_INET && |
1336 | rtnl_dereference(vxlan->vn4_sock) != sock4) | |
95ab0991 | 1337 | continue; |
b1be00a6 | 1338 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1339 | if (family == AF_INET6 && |
1340 | rtnl_dereference(vxlan->vn6_sock) != sock6) | |
b1be00a6 JB |
1341 | continue; |
1342 | #endif | |
95ab0991 G |
1343 | |
1344 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1345 | &dev->default_dst.remote_ip)) | |
1346 | continue; | |
1347 | ||
1348 | if (vxlan->default_dst.remote_ifindex != | |
1349 | dev->default_dst.remote_ifindex) | |
1350 | continue; | |
1351 | ||
1352 | return true; | |
553675fb | 1353 | } |
d342894c | 1354 | |
1355 | return false; | |
1356 | } | |
1357 | ||
544a773a | 1358 | static bool __vxlan_sock_release_prep(struct vxlan_sock *vs) |
7c47cedf | 1359 | { |
b1be00a6 | 1360 | struct vxlan_net *vn; |
012a5729 | 1361 | |
b1be00a6 | 1362 | if (!vs) |
544a773a | 1363 | return false; |
66af846f | 1364 | if (!refcount_dec_and_test(&vs->refcnt)) |
544a773a | 1365 | return false; |
d342894c | 1366 | |
b1be00a6 | 1367 | vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
1c51a915 | 1368 | spin_lock(&vn->sock_lock); |
7c47cedf | 1369 | hlist_del_rcu(&vs->hlist); |
e7b3db5e | 1370 | udp_tunnel_notify_del_rx_port(vs->sock, |
b9adcd69 AD |
1371 | (vs->flags & VXLAN_F_GPE) ? |
1372 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 1373 | UDP_TUNNEL_TYPE_VXLAN); |
1c51a915 SH |
1374 | spin_unlock(&vn->sock_lock); |
1375 | ||
544a773a | 1376 | return true; |
d342894c | 1377 | } |
1378 | ||
b1be00a6 JB |
1379 | static void vxlan_sock_release(struct vxlan_dev *vxlan) |
1380 | { | |
c6fcc4fc | 1381 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
b1be00a6 | 1382 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1383 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1384 | ||
57d88182 | 1385 | RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
544a773a HFS |
1386 | #endif |
1387 | ||
57d88182 | 1388 | RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
544a773a HFS |
1389 | synchronize_net(); |
1390 | ||
a53cb29b MB |
1391 | vxlan_vs_del_dev(vxlan); |
1392 | ||
c6fcc4fc | 1393 | if (__vxlan_sock_release_prep(sock4)) { |
1394 | udp_tunnel_sock_release(sock4->sock); | |
1395 | kfree(sock4); | |
544a773a HFS |
1396 | } |
1397 | ||
1398 | #if IS_ENABLED(CONFIG_IPV6) | |
c6fcc4fc | 1399 | if (__vxlan_sock_release_prep(sock6)) { |
1400 | udp_tunnel_sock_release(sock6->sock); | |
1401 | kfree(sock6); | |
544a773a | 1402 | } |
b1be00a6 JB |
1403 | #endif |
1404 | } | |
1405 | ||
56ef9c90 | 1406 | /* Update multicast group membership when first VNI on |
c4b49512 | 1407 | * multicast address is brought up |
7c47cedf | 1408 | */ |
56ef9c90 | 1409 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1410 | { |
b1be00a6 | 1411 | struct sock *sk; |
e4c7ed41 CW |
1412 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1413 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1414 | int ret = -EINVAL; |
d342894c | 1415 | |
e4c7ed41 | 1416 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1417 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1418 | struct ip_mreqn mreq = { |
1419 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1420 | .imr_ifindex = ifindex, | |
1421 | }; | |
1422 | ||
c6fcc4fc | 1423 | sk = sock4->sock->sk; |
b1be00a6 | 1424 | lock_sock(sk); |
56ef9c90 | 1425 | ret = ip_mc_join_group(sk, &mreq); |
b1be00a6 | 1426 | release_sock(sk); |
e4c7ed41 CW |
1427 | #if IS_ENABLED(CONFIG_IPV6) |
1428 | } else { | |
c6fcc4fc | 1429 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1430 | ||
1431 | sk = sock6->sock->sk; | |
b1be00a6 | 1432 | lock_sock(sk); |
56ef9c90 MRL |
1433 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1434 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1435 | release_sock(sk); |
e4c7ed41 CW |
1436 | #endif |
1437 | } | |
3fc2de2f | 1438 | |
56ef9c90 | 1439 | return ret; |
3fc2de2f | 1440 | } |
1441 | ||
1442 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1443 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1444 | { |
b1be00a6 | 1445 | struct sock *sk; |
e4c7ed41 CW |
1446 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1447 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1448 | int ret = -EINVAL; |
3fc2de2f | 1449 | |
e4c7ed41 | 1450 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1451 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1452 | struct ip_mreqn mreq = { |
1453 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1454 | .imr_ifindex = ifindex, | |
1455 | }; | |
1456 | ||
c6fcc4fc | 1457 | sk = sock4->sock->sk; |
b1be00a6 | 1458 | lock_sock(sk); |
56ef9c90 | 1459 | ret = ip_mc_leave_group(sk, &mreq); |
b1be00a6 | 1460 | release_sock(sk); |
e4c7ed41 CW |
1461 | #if IS_ENABLED(CONFIG_IPV6) |
1462 | } else { | |
c6fcc4fc | 1463 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1464 | ||
1465 | sk = sock6->sock->sk; | |
b1be00a6 | 1466 | lock_sock(sk); |
56ef9c90 MRL |
1467 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1468 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1469 | release_sock(sk); |
e4c7ed41 CW |
1470 | #endif |
1471 | } | |
d342894c | 1472 | |
56ef9c90 | 1473 | return ret; |
d342894c | 1474 | } |
1475 | ||
f14ecebb JB |
1476 | static bool vxlan_remcsum(struct vxlanhdr *unparsed, |
1477 | struct sk_buff *skb, u32 vxflags) | |
dfd8645e | 1478 | { |
7d34fa75 | 1479 | size_t start, offset; |
dfd8645e | 1480 | |
f14ecebb JB |
1481 | if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload) |
1482 | goto out; | |
b7fe10e5 | 1483 | |
f14ecebb JB |
1484 | start = vxlan_rco_start(unparsed->vx_vni); |
1485 | offset = start + vxlan_rco_offset(unparsed->vx_vni); | |
dfd8645e | 1486 | |
7d34fa75 | 1487 | if (!pskb_may_pull(skb, offset + sizeof(u16))) |
be5cfeab | 1488 | return false; |
dfd8645e | 1489 | |
be5cfeab JB |
1490 | skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset, |
1491 | !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
f14ecebb JB |
1492 | out: |
1493 | unparsed->vx_flags &= ~VXLAN_HF_RCO; | |
1494 | unparsed->vx_vni &= VXLAN_VNI_MASK; | |
be5cfeab | 1495 | return true; |
dfd8645e TH |
1496 | } |
1497 | ||
f14ecebb | 1498 | static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed, |
64f87d36 | 1499 | struct sk_buff *skb, u32 vxflags, |
10a5af23 | 1500 | struct vxlan_metadata *md) |
3288af08 | 1501 | { |
f14ecebb | 1502 | struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed; |
10a5af23 | 1503 | struct metadata_dst *tun_dst; |
f14ecebb JB |
1504 | |
1505 | if (!(unparsed->vx_flags & VXLAN_HF_GBP)) | |
1506 | goto out; | |
3288af08 | 1507 | |
3288af08 JB |
1508 | md->gbp = ntohs(gbp->policy_id); |
1509 | ||
10a5af23 | 1510 | tun_dst = (struct metadata_dst *)skb_dst(skb); |
810813c4 | 1511 | if (tun_dst) { |
3288af08 | 1512 | tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
810813c4 DM |
1513 | tun_dst->u.tun_info.options_len = sizeof(*md); |
1514 | } | |
3288af08 JB |
1515 | if (gbp->dont_learn) |
1516 | md->gbp |= VXLAN_GBP_DONT_LEARN; | |
1517 | ||
1518 | if (gbp->policy_applied) | |
1519 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; | |
f14ecebb | 1520 | |
64f87d36 JB |
1521 | /* In flow-based mode, GBP is carried in dst_metadata */ |
1522 | if (!(vxflags & VXLAN_F_COLLECT_METADATA)) | |
1523 | skb->mark = md->gbp; | |
f14ecebb JB |
1524 | out: |
1525 | unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS; | |
3288af08 JB |
1526 | } |
1527 | ||
e1e5314d | 1528 | static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed, |
61618eea | 1529 | __be16 *protocol, |
e1e5314d JB |
1530 | struct sk_buff *skb, u32 vxflags) |
1531 | { | |
1532 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed; | |
1533 | ||
1534 | /* Need to have Next Protocol set for interfaces in GPE mode. */ | |
1535 | if (!gpe->np_applied) | |
1536 | return false; | |
1537 | /* "The initial version is 0. If a receiver does not support the | |
1538 | * version indicated it MUST drop the packet. | |
1539 | */ | |
1540 | if (gpe->version != 0) | |
1541 | return false; | |
1542 | /* "When the O bit is set to 1, the packet is an OAM packet and OAM | |
1543 | * processing MUST occur." However, we don't implement OAM | |
1544 | * processing, thus drop the packet. | |
1545 | */ | |
1546 | if (gpe->oam_flag) | |
1547 | return false; | |
1548 | ||
fa20e0e3 JB |
1549 | *protocol = tun_p_to_eth_p(gpe->next_protocol); |
1550 | if (!*protocol) | |
e1e5314d | 1551 | return false; |
e1e5314d JB |
1552 | |
1553 | unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS; | |
1554 | return true; | |
1555 | } | |
1556 | ||
1ab016e2 JB |
1557 | static bool vxlan_set_mac(struct vxlan_dev *vxlan, |
1558 | struct vxlan_sock *vs, | |
3ad7a4b1 | 1559 | struct sk_buff *skb, __be32 vni) |
614732ea | 1560 | { |
614732ea | 1561 | union vxlan_addr saddr; |
87613de9 | 1562 | u32 ifindex = skb->dev->ifindex; |
614732ea | 1563 | |
614732ea | 1564 | skb_reset_mac_header(skb); |
614732ea TG |
1565 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
1566 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1567 | ||
1568 | /* Ignore packet loops (and multicast echo) */ | |
1569 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1ab016e2 | 1570 | return false; |
614732ea | 1571 | |
760c6805 | 1572 | /* Get address from the outer IP header */ |
ce212d0f | 1573 | if (vxlan_get_sk_family(vs) == AF_INET) { |
1ab016e2 | 1574 | saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; |
614732ea TG |
1575 | saddr.sa.sa_family = AF_INET; |
1576 | #if IS_ENABLED(CONFIG_IPV6) | |
1577 | } else { | |
1ab016e2 | 1578 | saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr; |
614732ea TG |
1579 | saddr.sa.sa_family = AF_INET6; |
1580 | #endif | |
1581 | } | |
1582 | ||
dc5321d7 | 1583 | if ((vxlan->cfg.flags & VXLAN_F_LEARN) && |
87613de9 | 1584 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni)) |
1ab016e2 JB |
1585 | return false; |
1586 | ||
1587 | return true; | |
1588 | } | |
1589 | ||
760c6805 JB |
1590 | static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph, |
1591 | struct sk_buff *skb) | |
1592 | { | |
1593 | int err = 0; | |
1594 | ||
1595 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1596 | err = IP_ECN_decapsulate(oiph, skb); | |
1597 | #if IS_ENABLED(CONFIG_IPV6) | |
1598 | else | |
1599 | err = IP6_ECN_decapsulate(oiph, skb); | |
1600 | #endif | |
1601 | ||
1602 | if (unlikely(err) && log_ecn_error) { | |
1603 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1604 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1605 | &((struct iphdr *)oiph)->saddr, | |
1606 | ((struct iphdr *)oiph)->tos); | |
1607 | else | |
1608 | net_info_ratelimited("non-ECT from %pI6\n", | |
1609 | &((struct ipv6hdr *)oiph)->saddr); | |
1610 | } | |
1611 | return err <= 1; | |
1612 | } | |
1613 | ||
d342894c | 1614 | /* Callback from net/ipv4/udp.c to receive packets */ |
f2d1968e | 1615 | static int vxlan_rcv(struct sock *sk, struct sk_buff *skb) |
d342894c | 1616 | { |
f2d1968e | 1617 | struct pcpu_sw_netstats *stats; |
c9e78efb | 1618 | struct vxlan_dev *vxlan; |
5cfccc5a | 1619 | struct vxlan_sock *vs; |
f14ecebb | 1620 | struct vxlanhdr unparsed; |
ee122c79 TG |
1621 | struct vxlan_metadata _md; |
1622 | struct vxlan_metadata *md = &_md; | |
61618eea | 1623 | __be16 protocol = htons(ETH_P_TEB); |
e1e5314d | 1624 | bool raw_proto = false; |
f2d1968e | 1625 | void *oiph; |
3ad7a4b1 | 1626 | __be32 vni = 0; |
d342894c | 1627 | |
e1e5314d | 1628 | /* Need UDP and VXLAN header to be present */ |
7ce04758 | 1629 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
e5aed006 | 1630 | goto drop; |
d342894c | 1631 | |
f14ecebb | 1632 | unparsed = *vxlan_hdr(skb); |
288b01c8 JB |
1633 | /* VNI flag always required to be set */ |
1634 | if (!(unparsed.vx_flags & VXLAN_HF_VNI)) { | |
1635 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1636 | ntohl(vxlan_hdr(skb)->vx_flags), | |
1637 | ntohl(vxlan_hdr(skb)->vx_vni)); | |
1638 | /* Return non vxlan pkt */ | |
e5aed006 | 1639 | goto drop; |
d342894c | 1640 | } |
288b01c8 JB |
1641 | unparsed.vx_flags &= ~VXLAN_HF_VNI; |
1642 | unparsed.vx_vni &= ~VXLAN_VNI_MASK; | |
d342894c | 1643 | |
559835ea | 1644 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1645 | if (!vs) |
d342894c | 1646 | goto drop; |
d342894c | 1647 | |
3ad7a4b1 RP |
1648 | vni = vxlan_vni(vxlan_hdr(skb)->vx_vni); |
1649 | ||
49f810f0 | 1650 | vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni); |
c9e78efb JB |
1651 | if (!vxlan) |
1652 | goto drop; | |
1653 | ||
e1e5314d JB |
1654 | /* For backwards compatibility, only allow reserved fields to be |
1655 | * used by VXLAN extensions if explicitly requested. | |
1656 | */ | |
1657 | if (vs->flags & VXLAN_F_GPE) { | |
1658 | if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags)) | |
1659 | goto drop; | |
1660 | raw_proto = true; | |
1661 | } | |
1662 | ||
1663 | if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto, | |
1664 | !net_eq(vxlan->net, dev_net(vxlan->dev)))) | |
1665 | goto drop; | |
c9e78efb | 1666 | |
ee122c79 | 1667 | if (vxlan_collect_metadata(vs)) { |
10a5af23 | 1668 | struct metadata_dst *tun_dst; |
07dabf20 | 1669 | |
c29a70d2 | 1670 | tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
d817f432 | 1671 | key32_to_tunnel_id(vni), sizeof(*md)); |
c29a70d2 | 1672 | |
ee122c79 TG |
1673 | if (!tun_dst) |
1674 | goto drop; | |
1675 | ||
0f1b7354 | 1676 | md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
10a5af23 JB |
1677 | |
1678 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
ee122c79 TG |
1679 | } else { |
1680 | memset(md, 0, sizeof(*md)); | |
1681 | } | |
1682 | ||
f14ecebb JB |
1683 | if (vs->flags & VXLAN_F_REMCSUM_RX) |
1684 | if (!vxlan_remcsum(&unparsed, skb, vs->flags)) | |
1685 | goto drop; | |
1686 | if (vs->flags & VXLAN_F_GBP) | |
10a5af23 | 1687 | vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md); |
e1e5314d JB |
1688 | /* Note that GBP and GPE can never be active together. This is |
1689 | * ensured in vxlan_dev_configure. | |
1690 | */ | |
3511494c | 1691 | |
f14ecebb | 1692 | if (unparsed.vx_flags || unparsed.vx_vni) { |
3bf39475 TH |
1693 | /* If there are any unprocessed flags remaining treat |
1694 | * this as a malformed packet. This behavior diverges from | |
1695 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1696 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1697 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1698 | * is more robust and provides a little more security in |
1699 | * adding extensions to VXLAN. | |
1700 | */ | |
288b01c8 | 1701 | goto drop; |
3bf39475 TH |
1702 | } |
1703 | ||
e1e5314d | 1704 | if (!raw_proto) { |
3ad7a4b1 | 1705 | if (!vxlan_set_mac(vxlan, vs, skb, vni)) |
e1e5314d JB |
1706 | goto drop; |
1707 | } else { | |
8be0cfa4 | 1708 | skb_reset_mac_header(skb); |
e1e5314d JB |
1709 | skb->dev = vxlan->dev; |
1710 | skb->pkt_type = PACKET_HOST; | |
1711 | } | |
f2d1968e | 1712 | |
f2d1968e JB |
1713 | oiph = skb_network_header(skb); |
1714 | skb_reset_network_header(skb); | |
1715 | ||
1716 | if (!vxlan_ecn_decapsulate(vs, oiph, skb)) { | |
1717 | ++vxlan->dev->stats.rx_frame_errors; | |
1718 | ++vxlan->dev->stats.rx_errors; | |
1719 | goto drop; | |
1720 | } | |
1721 | ||
1722 | stats = this_cpu_ptr(vxlan->dev->tstats); | |
1723 | u64_stats_update_begin(&stats->syncp); | |
1724 | stats->rx_packets++; | |
1725 | stats->rx_bytes += skb->len; | |
1726 | u64_stats_update_end(&stats->syncp); | |
1727 | ||
1728 | gro_cells_receive(&vxlan->gro_cells, skb); | |
5cfccc5a PS |
1729 | return 0; |
1730 | ||
1731 | drop: | |
288b01c8 JB |
1732 | /* Consume bad packet */ |
1733 | kfree_skb(skb); | |
1734 | return 0; | |
5cfccc5a PS |
1735 | } |
1736 | ||
c3a43b9f SB |
1737 | /* Callback from net/ipv{4,6}/udp.c to check that we have a VNI for errors */ |
1738 | static int vxlan_err_lookup(struct sock *sk, struct sk_buff *skb) | |
1739 | { | |
1740 | struct vxlan_dev *vxlan; | |
1741 | struct vxlan_sock *vs; | |
1742 | struct vxlanhdr *hdr; | |
1743 | __be32 vni; | |
1744 | ||
1745 | if (skb->len < VXLAN_HLEN) | |
1746 | return -EINVAL; | |
1747 | ||
1748 | hdr = vxlan_hdr(skb); | |
1749 | ||
1750 | if (!(hdr->vx_flags & VXLAN_HF_VNI)) | |
1751 | return -EINVAL; | |
1752 | ||
1753 | vs = rcu_dereference_sk_user_data(sk); | |
1754 | if (!vs) | |
1755 | return -ENOENT; | |
1756 | ||
1757 | vni = vxlan_vni(hdr->vx_vni); | |
1758 | vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni); | |
1759 | if (!vxlan) | |
1760 | return -ENOENT; | |
1761 | ||
1762 | return 0; | |
1763 | } | |
1764 | ||
3ad7a4b1 | 1765 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
e4f67add DS |
1766 | { |
1767 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1768 | struct arphdr *parp; | |
1769 | u8 *arpptr, *sha; | |
1770 | __be32 sip, tip; | |
1771 | struct neighbour *n; | |
1772 | ||
1773 | if (dev->flags & IFF_NOARP) | |
1774 | goto out; | |
1775 | ||
1776 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1777 | dev->stats.tx_dropped++; | |
1778 | goto out; | |
1779 | } | |
1780 | parp = arp_hdr(skb); | |
1781 | ||
1782 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
1783 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
1784 | parp->ar_pro != htons(ETH_P_IP) || | |
1785 | parp->ar_op != htons(ARPOP_REQUEST) || | |
1786 | parp->ar_hln != dev->addr_len || | |
1787 | parp->ar_pln != 4) | |
1788 | goto out; | |
1789 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
1790 | sha = arpptr; | |
1791 | arpptr += dev->addr_len; /* sha */ | |
1792 | memcpy(&sip, arpptr, sizeof(sip)); | |
1793 | arpptr += sizeof(sip); | |
1794 | arpptr += dev->addr_len; /* tha */ | |
1795 | memcpy(&tip, arpptr, sizeof(tip)); | |
1796 | ||
1797 | if (ipv4_is_loopback(tip) || | |
1798 | ipv4_is_multicast(tip)) | |
1799 | goto out; | |
1800 | ||
1801 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
1802 | ||
1803 | if (n) { | |
e4f67add DS |
1804 | struct vxlan_fdb *f; |
1805 | struct sk_buff *reply; | |
1806 | ||
1807 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1808 | neigh_release(n); | |
1809 | goto out; | |
1810 | } | |
1811 | ||
3ad7a4b1 | 1812 | f = vxlan_find_mac(vxlan, n->ha, vni); |
e4c7ed41 | 1813 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
1814 | /* bridge-local neighbor */ |
1815 | neigh_release(n); | |
1816 | goto out; | |
1817 | } | |
1818 | ||
1819 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
1820 | n->ha, sha); | |
1821 | ||
1822 | neigh_release(n); | |
1823 | ||
7346135d DS |
1824 | if (reply == NULL) |
1825 | goto out; | |
1826 | ||
e4f67add DS |
1827 | skb_reset_mac_header(reply); |
1828 | __skb_pull(reply, skb_network_offset(reply)); | |
1829 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1830 | reply->pkt_type = PACKET_HOST; | |
1831 | ||
1832 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1833 | dev->stats.rx_dropped++; | |
dc5321d7 | 1834 | } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) { |
e4c7ed41 CW |
1835 | union vxlan_addr ipa = { |
1836 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 1837 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
1838 | }; |
1839 | ||
1840 | vxlan_ip_miss(dev, &ipa); | |
1841 | } | |
e4f67add DS |
1842 | out: |
1843 | consume_skb(skb); | |
1844 | return NETDEV_TX_OK; | |
1845 | } | |
1846 | ||
f564f45c | 1847 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
1848 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
1849 | struct neighbour *n, bool isrouter) | |
1850 | { | |
1851 | struct net_device *dev = request->dev; | |
1852 | struct sk_buff *reply; | |
1853 | struct nd_msg *ns, *na; | |
1854 | struct ipv6hdr *pip6; | |
1855 | u8 *daddr; | |
1856 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
1857 | int ns_olen; | |
1858 | int i, len; | |
1859 | ||
f1fb08f6 | 1860 | if (dev == NULL || !pskb_may_pull(request, request->len)) |
4b29dba9 DS |
1861 | return NULL; |
1862 | ||
1863 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
1864 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
1865 | reply = alloc_skb(len, GFP_ATOMIC); | |
1866 | if (reply == NULL) | |
1867 | return NULL; | |
1868 | ||
1869 | reply->protocol = htons(ETH_P_IPV6); | |
1870 | reply->dev = dev; | |
1871 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
1872 | skb_push(reply, sizeof(struct ethhdr)); | |
6297b91c | 1873 | skb_reset_mac_header(reply); |
4b29dba9 | 1874 | |
f1fb08f6 | 1875 | ns = (struct nd_msg *)(ipv6_hdr(request) + 1); |
4b29dba9 DS |
1876 | |
1877 | daddr = eth_hdr(request)->h_source; | |
f1fb08f6 VB |
1878 | ns_olen = request->len - skb_network_offset(request) - |
1879 | sizeof(struct ipv6hdr) - sizeof(*ns); | |
4b29dba9 DS |
1880 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { |
1881 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { | |
1882 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
1883 | break; | |
1884 | } | |
1885 | } | |
1886 | ||
1887 | /* Ethernet header */ | |
1888 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
1889 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
1890 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
1891 | reply->protocol = htons(ETH_P_IPV6); | |
1892 | ||
1893 | skb_pull(reply, sizeof(struct ethhdr)); | |
6297b91c | 1894 | skb_reset_network_header(reply); |
4b29dba9 DS |
1895 | skb_put(reply, sizeof(struct ipv6hdr)); |
1896 | ||
1897 | /* IPv6 header */ | |
1898 | ||
1899 | pip6 = ipv6_hdr(reply); | |
1900 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
1901 | pip6->version = 6; | |
1902 | pip6->priority = ipv6_hdr(request)->priority; | |
1903 | pip6->nexthdr = IPPROTO_ICMPV6; | |
1904 | pip6->hop_limit = 255; | |
1905 | pip6->daddr = ipv6_hdr(request)->saddr; | |
1906 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
1907 | ||
1908 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
6297b91c | 1909 | skb_reset_transport_header(reply); |
4b29dba9 | 1910 | |
4b29dba9 | 1911 | /* Neighbor Advertisement */ |
b080db58 | 1912 | na = skb_put_zero(reply, sizeof(*na) + na_olen); |
4b29dba9 DS |
1913 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; |
1914 | na->icmph.icmp6_router = isrouter; | |
1915 | na->icmph.icmp6_override = 1; | |
1916 | na->icmph.icmp6_solicited = 1; | |
1917 | na->target = ns->target; | |
1918 | ether_addr_copy(&na->opt[2], n->ha); | |
1919 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
1920 | na->opt[1] = na_olen >> 3; | |
1921 | ||
1922 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
1923 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
1924 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
1925 | ||
1926 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
1927 | ||
1928 | skb_push(reply, sizeof(struct ipv6hdr)); | |
1929 | ||
1930 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
1931 | ||
1932 | return reply; | |
1933 | } | |
1934 | ||
3ad7a4b1 | 1935 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
f564f45c CW |
1936 | { |
1937 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
8dcd81a9 | 1938 | const struct in6_addr *daddr; |
8bff3685 | 1939 | const struct ipv6hdr *iphdr; |
4b29dba9 | 1940 | struct inet6_dev *in6_dev; |
8bff3685 XL |
1941 | struct neighbour *n; |
1942 | struct nd_msg *msg; | |
f564f45c CW |
1943 | |
1944 | in6_dev = __in6_dev_get(dev); | |
1945 | if (!in6_dev) | |
1946 | goto out; | |
1947 | ||
f564f45c | 1948 | iphdr = ipv6_hdr(skb); |
f564f45c | 1949 | daddr = &iphdr->daddr; |
f1fb08f6 | 1950 | msg = (struct nd_msg *)(iphdr + 1); |
f564f45c | 1951 | |
4b29dba9 DS |
1952 | if (ipv6_addr_loopback(daddr) || |
1953 | ipv6_addr_is_multicast(&msg->target)) | |
1954 | goto out; | |
1955 | ||
1956 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
1957 | |
1958 | if (n) { | |
1959 | struct vxlan_fdb *f; | |
4b29dba9 | 1960 | struct sk_buff *reply; |
f564f45c CW |
1961 | |
1962 | if (!(n->nud_state & NUD_CONNECTED)) { | |
1963 | neigh_release(n); | |
1964 | goto out; | |
1965 | } | |
1966 | ||
3ad7a4b1 | 1967 | f = vxlan_find_mac(vxlan, n->ha, vni); |
f564f45c CW |
1968 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
1969 | /* bridge-local neighbor */ | |
1970 | neigh_release(n); | |
1971 | goto out; | |
1972 | } | |
1973 | ||
4b29dba9 DS |
1974 | reply = vxlan_na_create(skb, n, |
1975 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
1976 | ||
f564f45c | 1977 | neigh_release(n); |
4b29dba9 DS |
1978 | |
1979 | if (reply == NULL) | |
1980 | goto out; | |
1981 | ||
1982 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
1983 | dev->stats.rx_dropped++; | |
1984 | ||
dc5321d7 | 1985 | } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
1986 | union vxlan_addr ipa = { |
1987 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 1988 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
1989 | }; |
1990 | ||
f564f45c CW |
1991 | vxlan_ip_miss(dev, &ipa); |
1992 | } | |
1993 | ||
1994 | out: | |
1995 | consume_skb(skb); | |
1996 | return NETDEV_TX_OK; | |
1997 | } | |
1998 | #endif | |
1999 | ||
e4f67add DS |
2000 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
2001 | { | |
2002 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2003 | struct neighbour *n; | |
e4f67add DS |
2004 | |
2005 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
2006 | return false; | |
2007 | ||
2008 | n = NULL; | |
2009 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
2010 | case ETH_P_IP: | |
e15a00aa CW |
2011 | { |
2012 | struct iphdr *pip; | |
2013 | ||
e4f67add DS |
2014 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
2015 | return false; | |
2016 | pip = ip_hdr(skb); | |
2017 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
dc5321d7 | 2018 | if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) { |
e4c7ed41 CW |
2019 | union vxlan_addr ipa = { |
2020 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 2021 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
2022 | }; |
2023 | ||
2024 | vxlan_ip_miss(dev, &ipa); | |
2025 | return false; | |
2026 | } | |
2027 | ||
e4f67add | 2028 | break; |
e15a00aa CW |
2029 | } |
2030 | #if IS_ENABLED(CONFIG_IPV6) | |
2031 | case ETH_P_IPV6: | |
2032 | { | |
2033 | struct ipv6hdr *pip6; | |
2034 | ||
2035 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
2036 | return false; | |
2037 | pip6 = ipv6_hdr(skb); | |
2038 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
dc5321d7 | 2039 | if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) { |
e15a00aa CW |
2040 | union vxlan_addr ipa = { |
2041 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 2042 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
2043 | }; |
2044 | ||
2045 | vxlan_ip_miss(dev, &ipa); | |
2046 | return false; | |
2047 | } | |
2048 | ||
2049 | break; | |
2050 | } | |
2051 | #endif | |
e4f67add DS |
2052 | default: |
2053 | return false; | |
2054 | } | |
2055 | ||
2056 | if (n) { | |
2057 | bool diff; | |
2058 | ||
7367d0b5 | 2059 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
2060 | if (diff) { |
2061 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
2062 | dev->addr_len); | |
2063 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
2064 | } | |
2065 | neigh_release(n); | |
2066 | return diff; | |
e4c7ed41 CW |
2067 | } |
2068 | ||
e4f67add DS |
2069 | return false; |
2070 | } | |
2071 | ||
af33c1ad | 2072 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
2073 | struct vxlan_metadata *md) |
2074 | { | |
2075 | struct vxlanhdr_gbp *gbp; | |
2076 | ||
db79a621 TG |
2077 | if (!md->gbp) |
2078 | return; | |
2079 | ||
3511494c | 2080 | gbp = (struct vxlanhdr_gbp *)vxh; |
54bfd872 | 2081 | vxh->vx_flags |= VXLAN_HF_GBP; |
3511494c TG |
2082 | |
2083 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
2084 | gbp->dont_learn = 1; | |
2085 | ||
2086 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
2087 | gbp->policy_applied = 1; | |
2088 | ||
2089 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
2090 | } | |
2091 | ||
e1e5314d JB |
2092 | static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags, |
2093 | __be16 protocol) | |
2094 | { | |
2095 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh; | |
2096 | ||
2097 | gpe->np_applied = 1; | |
fa20e0e3 JB |
2098 | gpe->next_protocol = tun_p_from_eth_p(protocol); |
2099 | if (!gpe->next_protocol) | |
2100 | return -EPFNOSUPPORT; | |
2101 | return 0; | |
e1e5314d JB |
2102 | } |
2103 | ||
f491e56d JB |
2104 | static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst, |
2105 | int iphdr_len, __be32 vni, | |
2106 | struct vxlan_metadata *md, u32 vxflags, | |
b4ed5cad | 2107 | bool udp_sum) |
e4c7ed41 | 2108 | { |
e4c7ed41 | 2109 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
2110 | int min_headroom; |
2111 | int err; | |
dfd8645e | 2112 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
e1e5314d | 2113 | __be16 inner_protocol = htons(ETH_P_TEB); |
dfd8645e | 2114 | |
af33c1ad | 2115 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
2116 | skb->ip_summed == CHECKSUM_PARTIAL) { |
2117 | int csum_start = skb_checksum_start_offset(skb); | |
2118 | ||
2119 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
2120 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
2121 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
b5708501 | 2122 | skb->csum_offset == offsetof(struct tcphdr, check))) |
dfd8645e | 2123 | type |= SKB_GSO_TUNNEL_REMCSUM; |
dfd8645e | 2124 | } |
e4c7ed41 | 2125 | |
e4c7ed41 | 2126 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
4a4f86cc | 2127 | + VXLAN_HLEN + iphdr_len; |
649c5b8b PS |
2128 | |
2129 | /* Need space for new headers (invalidates iph ptr) */ | |
2130 | err = skb_cow_head(skb, min_headroom); | |
e1e5314d | 2131 | if (unlikely(err)) |
c46b7897 | 2132 | return err; |
649c5b8b | 2133 | |
aed069df AD |
2134 | err = iptunnel_handle_offloads(skb, type); |
2135 | if (err) | |
c46b7897 | 2136 | return err; |
b736a623 | 2137 | |
d58ff351 | 2138 | vxh = __skb_push(skb, sizeof(*vxh)); |
54bfd872 JB |
2139 | vxh->vx_flags = VXLAN_HF_VNI; |
2140 | vxh->vx_vni = vxlan_vni_field(vni); | |
49560532 | 2141 | |
dfd8645e | 2142 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
54bfd872 | 2143 | unsigned int start; |
dfd8645e | 2144 | |
54bfd872 JB |
2145 | start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr); |
2146 | vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset); | |
2147 | vxh->vx_flags |= VXLAN_HF_RCO; | |
dfd8645e TH |
2148 | |
2149 | if (!skb_is_gso(skb)) { | |
2150 | skb->ip_summed = CHECKSUM_NONE; | |
2151 | skb->encapsulation = 0; | |
2152 | } | |
2153 | } | |
2154 | ||
af33c1ad TH |
2155 | if (vxflags & VXLAN_F_GBP) |
2156 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
e1e5314d JB |
2157 | if (vxflags & VXLAN_F_GPE) { |
2158 | err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol); | |
2159 | if (err < 0) | |
c46b7897 | 2160 | return err; |
e1e5314d JB |
2161 | inner_protocol = skb->protocol; |
2162 | } | |
3511494c | 2163 | |
e1e5314d | 2164 | skb_set_inner_protocol(skb, inner_protocol); |
039f5062 | 2165 | return 0; |
49560532 | 2166 | } |
49560532 | 2167 | |
655c3de1 | 2168 | static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev, |
2169 | struct vxlan_sock *sock4, | |
1a8496ba | 2170 | struct sk_buff *skb, int oif, u8 tos, |
4ecb1d83 | 2171 | __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport, |
0c1d70af | 2172 | struct dst_cache *dst_cache, |
db3c6139 | 2173 | const struct ip_tunnel_info *info) |
1a8496ba | 2174 | { |
db3c6139 | 2175 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
1a8496ba JB |
2176 | struct rtable *rt = NULL; |
2177 | struct flowi4 fl4; | |
2178 | ||
655c3de1 | 2179 | if (!sock4) |
2180 | return ERR_PTR(-EIO); | |
2181 | ||
db3c6139 DB |
2182 | if (tos && !info) |
2183 | use_cache = false; | |
2184 | if (use_cache) { | |
0c1d70af PA |
2185 | rt = dst_cache_get_ip4(dst_cache, saddr); |
2186 | if (rt) | |
2187 | return rt; | |
2188 | } | |
2189 | ||
1a8496ba JB |
2190 | memset(&fl4, 0, sizeof(fl4)); |
2191 | fl4.flowi4_oif = oif; | |
2192 | fl4.flowi4_tos = RT_TOS(tos); | |
2193 | fl4.flowi4_mark = skb->mark; | |
2194 | fl4.flowi4_proto = IPPROTO_UDP; | |
2195 | fl4.daddr = daddr; | |
272d96a5 | 2196 | fl4.saddr = *saddr; |
4ecb1d83 MP |
2197 | fl4.fl4_dport = dport; |
2198 | fl4.fl4_sport = sport; | |
1a8496ba JB |
2199 | |
2200 | rt = ip_route_output_key(vxlan->net, &fl4); | |
655c3de1 | 2201 | if (likely(!IS_ERR(rt))) { |
2202 | if (rt->dst.dev == dev) { | |
2203 | netdev_dbg(dev, "circular route to %pI4\n", &daddr); | |
2204 | ip_rt_put(rt); | |
2205 | return ERR_PTR(-ELOOP); | |
2206 | } | |
2207 | ||
1a8496ba | 2208 | *saddr = fl4.saddr; |
0c1d70af PA |
2209 | if (use_cache) |
2210 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); | |
655c3de1 | 2211 | } else { |
2212 | netdev_dbg(dev, "no route to %pI4\n", &daddr); | |
2213 | return ERR_PTR(-ENETUNREACH); | |
0c1d70af | 2214 | } |
1a8496ba JB |
2215 | return rt; |
2216 | } | |
2217 | ||
e5d4b29f JB |
2218 | #if IS_ENABLED(CONFIG_IPV6) |
2219 | static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan, | |
655c3de1 | 2220 | struct net_device *dev, |
03dc52a8 | 2221 | struct vxlan_sock *sock6, |
1400615d | 2222 | struct sk_buff *skb, int oif, u8 tos, |
e7f70af1 | 2223 | __be32 label, |
e5d4b29f | 2224 | const struct in6_addr *daddr, |
0c1d70af | 2225 | struct in6_addr *saddr, |
4ecb1d83 | 2226 | __be16 dport, __be16 sport, |
db3c6139 DB |
2227 | struct dst_cache *dst_cache, |
2228 | const struct ip_tunnel_info *info) | |
e5d4b29f | 2229 | { |
db3c6139 | 2230 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e5d4b29f JB |
2231 | struct dst_entry *ndst; |
2232 | struct flowi6 fl6; | |
2233 | int err; | |
2234 | ||
c6fcc4fc | 2235 | if (!sock6) |
2236 | return ERR_PTR(-EIO); | |
2237 | ||
1400615d DB |
2238 | if (tos && !info) |
2239 | use_cache = false; | |
db3c6139 | 2240 | if (use_cache) { |
0c1d70af PA |
2241 | ndst = dst_cache_get_ip6(dst_cache, saddr); |
2242 | if (ndst) | |
2243 | return ndst; | |
2244 | } | |
2245 | ||
e5d4b29f JB |
2246 | memset(&fl6, 0, sizeof(fl6)); |
2247 | fl6.flowi6_oif = oif; | |
2248 | fl6.daddr = *daddr; | |
272d96a5 | 2249 | fl6.saddr = *saddr; |
eaa93bf4 | 2250 | fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label); |
e5d4b29f JB |
2251 | fl6.flowi6_mark = skb->mark; |
2252 | fl6.flowi6_proto = IPPROTO_UDP; | |
4ecb1d83 MP |
2253 | fl6.fl6_dport = dport; |
2254 | fl6.fl6_sport = sport; | |
e5d4b29f JB |
2255 | |
2256 | err = ipv6_stub->ipv6_dst_lookup(vxlan->net, | |
c6fcc4fc | 2257 | sock6->sock->sk, |
e5d4b29f | 2258 | &ndst, &fl6); |
655c3de1 | 2259 | if (unlikely(err < 0)) { |
2260 | netdev_dbg(dev, "no route to %pI6\n", daddr); | |
2261 | return ERR_PTR(-ENETUNREACH); | |
2262 | } | |
2263 | ||
2264 | if (unlikely(ndst->dev == dev)) { | |
2265 | netdev_dbg(dev, "circular route to %pI6\n", daddr); | |
2266 | dst_release(ndst); | |
2267 | return ERR_PTR(-ELOOP); | |
2268 | } | |
e5d4b29f JB |
2269 | |
2270 | *saddr = fl6.saddr; | |
db3c6139 | 2271 | if (use_cache) |
0c1d70af | 2272 | dst_cache_set_ip6(dst_cache, ndst, saddr); |
e5d4b29f JB |
2273 | return ndst; |
2274 | } | |
2275 | #endif | |
2276 | ||
9dcc71e1 SS |
2277 | /* Bypass encapsulation if the destination is local */ |
2278 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
3ad7a4b1 | 2279 | struct vxlan_dev *dst_vxlan, __be32 vni) |
9dcc71e1 | 2280 | { |
8f84985f | 2281 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
2282 | union vxlan_addr loopback; |
2283 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
ce6502a8 LR |
2284 | struct net_device *dev = skb->dev; |
2285 | int len = skb->len; | |
9dcc71e1 | 2286 | |
8f84985f LR |
2287 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
2288 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
2289 | skb->pkt_type = PACKET_HOST; |
2290 | skb->encapsulation = 0; | |
2291 | skb->dev = dst_vxlan->dev; | |
2292 | __skb_pull(skb, skb_network_offset(skb)); | |
2293 | ||
e4c7ed41 CW |
2294 | if (remote_ip->sa.sa_family == AF_INET) { |
2295 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
2296 | loopback.sa.sa_family = AF_INET; | |
2297 | #if IS_ENABLED(CONFIG_IPV6) | |
2298 | } else { | |
2299 | loopback.sin6.sin6_addr = in6addr_loopback; | |
2300 | loopback.sa.sa_family = AF_INET6; | |
2301 | #endif | |
2302 | } | |
2303 | ||
dc5321d7 | 2304 | if (dst_vxlan->cfg.flags & VXLAN_F_LEARN) |
87613de9 MS |
2305 | vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source, 0, |
2306 | vni); | |
9dcc71e1 SS |
2307 | |
2308 | u64_stats_update_begin(&tx_stats->syncp); | |
2309 | tx_stats->tx_packets++; | |
ce6502a8 | 2310 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
2311 | u64_stats_update_end(&tx_stats->syncp); |
2312 | ||
2313 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
2314 | u64_stats_update_begin(&rx_stats->syncp); | |
2315 | rx_stats->rx_packets++; | |
ce6502a8 | 2316 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
2317 | u64_stats_update_end(&rx_stats->syncp); |
2318 | } else { | |
ce6502a8 | 2319 | dev->stats.rx_dropped++; |
9dcc71e1 SS |
2320 | } |
2321 | } | |
2322 | ||
fee1fad7 | 2323 | static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev, |
49f810f0 MS |
2324 | struct vxlan_dev *vxlan, |
2325 | union vxlan_addr *daddr, | |
2326 | __be16 dst_port, int dst_ifindex, __be32 vni, | |
2327 | struct dst_entry *dst, | |
fee1fad7 | 2328 | u32 rt_flags) |
2329 | { | |
2330 | #if IS_ENABLED(CONFIG_IPV6) | |
2331 | /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of | |
2332 | * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple | |
2333 | * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry. | |
2334 | */ | |
2335 | BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL); | |
2336 | #endif | |
2337 | /* Bypass encapsulation if the destination is local */ | |
2338 | if (rt_flags & RTCF_LOCAL && | |
2339 | !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
2340 | struct vxlan_dev *dst_vxlan; | |
2341 | ||
2342 | dst_release(dst); | |
49f810f0 | 2343 | dst_vxlan = vxlan_find_vni(vxlan->net, dst_ifindex, vni, |
fee1fad7 | 2344 | daddr->sa.sa_family, dst_port, |
dc5321d7 | 2345 | vxlan->cfg.flags); |
fee1fad7 | 2346 | if (!dst_vxlan) { |
2347 | dev->stats.tx_errors++; | |
2348 | kfree_skb(skb); | |
2349 | ||
2350 | return -ENOENT; | |
2351 | } | |
3ad7a4b1 | 2352 | vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni); |
fee1fad7 | 2353 | return 1; |
2354 | } | |
2355 | ||
2356 | return 0; | |
2357 | } | |
2358 | ||
4ad16930 | 2359 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
3ad7a4b1 RP |
2360 | __be32 default_vni, struct vxlan_rdst *rdst, |
2361 | bool did_rsc) | |
d342894c | 2362 | { |
d71785ff | 2363 | struct dst_cache *dst_cache; |
3093fbe7 | 2364 | struct ip_tunnel_info *info; |
d342894c | 2365 | struct vxlan_dev *vxlan = netdev_priv(dev); |
0770b53b | 2366 | const struct iphdr *old_iph = ip_hdr(skb); |
e4c7ed41 | 2367 | union vxlan_addr *dst; |
272d96a5 | 2368 | union vxlan_addr remote_ip, local_ip; |
ee122c79 TG |
2369 | struct vxlan_metadata _md; |
2370 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 2371 | __be16 src_port = 0, dst_port; |
655c3de1 | 2372 | struct dst_entry *ndst = NULL; |
e7f70af1 | 2373 | __be32 vni, label; |
d342894c | 2374 | __u8 tos, ttl; |
49f810f0 | 2375 | int ifindex; |
0e6fbc5b | 2376 | int err; |
dc5321d7 | 2377 | u32 flags = vxlan->cfg.flags; |
b4ed5cad | 2378 | bool udp_sum = false; |
f491e56d | 2379 | bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev)); |
d342894c | 2380 | |
61adedf3 | 2381 | info = skb_tunnel_info(skb); |
3093fbe7 | 2382 | |
ee122c79 | 2383 | if (rdst) { |
0770b53b | 2384 | dst = &rdst->remote_ip; |
2385 | if (vxlan_addr_any(dst)) { | |
2386 | if (did_rsc) { | |
2387 | /* short-circuited back to local bridge */ | |
3ad7a4b1 | 2388 | vxlan_encap_bypass(skb, vxlan, vxlan, default_vni); |
0770b53b | 2389 | return; |
2390 | } | |
2391 | goto drop; | |
2392 | } | |
2393 | ||
0dfbdf41 | 2394 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
3ad7a4b1 | 2395 | vni = (rdst->remote_vni) ? : default_vni; |
49f810f0 | 2396 | ifindex = rdst->remote_ifindex; |
1158632b | 2397 | local_ip = vxlan->cfg.saddr; |
d71785ff | 2398 | dst_cache = &rdst->dst_cache; |
0770b53b | 2399 | md->gbp = skb->mark; |
72f6d71e HL |
2400 | if (flags & VXLAN_F_TTL_INHERIT) { |
2401 | ttl = ip_tunnel_get_ttl(old_iph, skb); | |
2402 | } else { | |
2403 | ttl = vxlan->cfg.ttl; | |
2404 | if (!ttl && vxlan_addr_multicast(dst)) | |
2405 | ttl = 1; | |
2406 | } | |
0770b53b | 2407 | |
2408 | tos = vxlan->cfg.tos; | |
2409 | if (tos == 1) | |
2410 | tos = ip_tunnel_get_dsfield(old_iph, skb); | |
2411 | ||
2412 | if (dst->sa.sa_family == AF_INET) | |
2413 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX); | |
2414 | else | |
2415 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); | |
2416 | label = vxlan->cfg.label; | |
ee122c79 TG |
2417 | } else { |
2418 | if (!info) { | |
2419 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
2420 | dev->name); | |
2421 | goto drop; | |
2422 | } | |
b1be00a6 | 2423 | remote_ip.sa.sa_family = ip_tunnel_info_af(info); |
272d96a5 | 2424 | if (remote_ip.sa.sa_family == AF_INET) { |
a725e514 | 2425 | remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; |
272d96a5 | 2426 | local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src; |
2427 | } else { | |
a725e514 | 2428 | remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; |
272d96a5 | 2429 | local_ip.sin6.sin6_addr = info->key.u.ipv6.src; |
2430 | } | |
ee122c79 | 2431 | dst = &remote_ip; |
0770b53b | 2432 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
2433 | vni = tunnel_id_to_key32(info->key.tun_id); | |
49f810f0 | 2434 | ifindex = 0; |
d71785ff | 2435 | dst_cache = &info->dst_cache; |
256c87c1 PJV |
2436 | if (info->options_len && |
2437 | info->key.tun_flags & TUNNEL_VXLAN_OPT) | |
0770b53b | 2438 | md = ip_tunnel_info_opts(info); |
a725e514 JB |
2439 | ttl = info->key.ttl; |
2440 | tos = info->key.tos; | |
e7f70af1 | 2441 | label = info->key.label; |
b4ed5cad | 2442 | udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
a725e514 | 2443 | } |
0770b53b | 2444 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
2445 | vxlan->cfg.port_max, true); | |
a725e514 | 2446 | |
56de859e | 2447 | rcu_read_lock(); |
e4c7ed41 | 2448 | if (dst->sa.sa_family == AF_INET) { |
c6fcc4fc | 2449 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
c46b7897 | 2450 | struct rtable *rt; |
0770b53b | 2451 | __be16 df = 0; |
c6fcc4fc | 2452 | |
aab8cc36 AB |
2453 | if (!ifindex) |
2454 | ifindex = sock4->sock->sk->sk_bound_dev_if; | |
2455 | ||
49f810f0 | 2456 | rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos, |
272d96a5 | 2457 | dst->sin.sin_addr.s_addr, |
1158632b | 2458 | &local_ip.sin.sin_addr.s_addr, |
4ecb1d83 | 2459 | dst_port, src_port, |
d71785ff | 2460 | dst_cache, info); |
8ebd115b DM |
2461 | if (IS_ERR(rt)) { |
2462 | err = PTR_ERR(rt); | |
c46b7897 | 2463 | goto tx_error; |
8ebd115b | 2464 | } |
e4c7ed41 | 2465 | |
fee1fad7 | 2466 | if (!info) { |
b4d30697 | 2467 | /* Bypass encapsulation if the destination is local */ |
fee1fad7 | 2468 | err = encap_bypass_if_local(skb, dev, vxlan, dst, |
49f810f0 MS |
2469 | dst_port, ifindex, vni, |
2470 | &rt->dst, rt->rt_flags); | |
fee1fad7 | 2471 | if (err) |
56de859e | 2472 | goto out_unlock; |
b4d30697 SB |
2473 | |
2474 | if (vxlan->cfg.df == VXLAN_DF_SET) { | |
2475 | df = htons(IP_DF); | |
2476 | } else if (vxlan->cfg.df == VXLAN_DF_INHERIT) { | |
2477 | struct ethhdr *eth = eth_hdr(skb); | |
2478 | ||
2479 | if (ntohs(eth->h_proto) == ETH_P_IPV6 || | |
2480 | (ntohs(eth->h_proto) == ETH_P_IP && | |
2481 | old_iph->frag_off & htons(IP_DF))) | |
2482 | df = htons(IP_DF); | |
2483 | } | |
fee1fad7 | 2484 | } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) { |
6ceb31ca | 2485 | df = htons(IP_DF); |
fee1fad7 | 2486 | } |
6ceb31ca | 2487 | |
c46b7897 | 2488 | ndst = &rt->dst; |
6b4f92af | 2489 | skb_tunnel_check_pmtu(skb, ndst, VXLAN_HEADROOM); |
a93bf0ff | 2490 | |
e4c7ed41 CW |
2491 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
2492 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
c46b7897 | 2493 | err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr), |
54bfd872 | 2494 | vni, md, flags, udp_sum); |
f491e56d | 2495 | if (err < 0) |
c46b7897 | 2496 | goto tx_error; |
f491e56d | 2497 | |
1158632b | 2498 | udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr, |
f491e56d JB |
2499 | dst->sin.sin_addr.s_addr, tos, ttl, df, |
2500 | src_port, dst_port, xnet, !udp_sum); | |
e4c7ed41 CW |
2501 | #if IS_ENABLED(CONFIG_IPV6) |
2502 | } else { | |
c6fcc4fc | 2503 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
e4c7ed41 | 2504 | |
aab8cc36 AB |
2505 | if (!ifindex) |
2506 | ifindex = sock6->sock->sk->sk_bound_dev_if; | |
2507 | ||
49f810f0 | 2508 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, ifindex, tos, |
272d96a5 | 2509 | label, &dst->sin6.sin6_addr, |
1158632b | 2510 | &local_ip.sin6.sin6_addr, |
4ecb1d83 | 2511 | dst_port, src_port, |
db3c6139 | 2512 | dst_cache, info); |
e5d4b29f | 2513 | if (IS_ERR(ndst)) { |
8ebd115b | 2514 | err = PTR_ERR(ndst); |
c46b7897 | 2515 | ndst = NULL; |
9dcc71e1 | 2516 | goto tx_error; |
e4c7ed41 | 2517 | } |
655c3de1 | 2518 | |
fee1fad7 | 2519 | if (!info) { |
2520 | u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
49560532 | 2521 | |
fee1fad7 | 2522 | err = encap_bypass_if_local(skb, dev, vxlan, dst, |
49f810f0 MS |
2523 | dst_port, ifindex, vni, |
2524 | ndst, rt6i_flags); | |
fee1fad7 | 2525 | if (err) |
56de859e | 2526 | goto out_unlock; |
fee1fad7 | 2527 | } |
35e2d115 | 2528 | |
6b4f92af | 2529 | skb_tunnel_check_pmtu(skb, ndst, VXLAN6_HEADROOM); |
a93bf0ff | 2530 | |
1400615d | 2531 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
e4c7ed41 | 2532 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
f491e56d JB |
2533 | skb_scrub_packet(skb, xnet); |
2534 | err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr), | |
54bfd872 | 2535 | vni, md, flags, udp_sum); |
c46b7897 | 2536 | if (err < 0) |
2537 | goto tx_error; | |
2538 | ||
0770b53b | 2539 | udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev, |
1158632b | 2540 | &local_ip.sin6.sin6_addr, |
272d96a5 | 2541 | &dst->sin6.sin6_addr, tos, ttl, |
e7f70af1 | 2542 | label, src_port, dst_port, !udp_sum); |
e4c7ed41 CW |
2543 | #endif |
2544 | } | |
56de859e JK |
2545 | out_unlock: |
2546 | rcu_read_unlock(); | |
4ad16930 | 2547 | return; |
d342894c | 2548 | |
2549 | drop: | |
2550 | dev->stats.tx_dropped++; | |
c46b7897 | 2551 | dev_kfree_skb(skb); |
2552 | return; | |
d342894c | 2553 | |
2554 | tx_error: | |
56de859e | 2555 | rcu_read_unlock(); |
655c3de1 | 2556 | if (err == -ELOOP) |
2557 | dev->stats.collisions++; | |
2558 | else if (err == -ENETUNREACH) | |
2559 | dev->stats.tx_carrier_errors++; | |
c46b7897 | 2560 | dst_release(ndst); |
d342894c | 2561 | dev->stats.tx_errors++; |
c46b7897 | 2562 | kfree_skb(skb); |
d342894c | 2563 | } |
2564 | ||
6681712d DS |
2565 | /* Transmit local packets over Vxlan |
2566 | * | |
2567 | * Outer IP header inherits ECN and DF from inner header. | |
2568 | * Outer UDP destination is the VXLAN assigned port. | |
2569 | * source port is based on hash of flow | |
2570 | */ | |
2571 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2572 | { | |
2573 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
8bff3685 | 2574 | struct vxlan_rdst *rdst, *fdst = NULL; |
3093fbe7 | 2575 | const struct ip_tunnel_info *info; |
6681712d | 2576 | bool did_rsc = false; |
6681712d | 2577 | struct vxlan_fdb *f; |
8bff3685 | 2578 | struct ethhdr *eth; |
3ad7a4b1 | 2579 | __be32 vni = 0; |
6681712d | 2580 | |
61adedf3 | 2581 | info = skb_tunnel_info(skb); |
3093fbe7 | 2582 | |
6681712d | 2583 | skb_reset_mac_header(skb); |
6681712d | 2584 | |
dc5321d7 | 2585 | if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) { |
3ad7a4b1 RP |
2586 | if (info && info->mode & IP_TUNNEL_INFO_BRIDGE && |
2587 | info->mode & IP_TUNNEL_INFO_TX) { | |
2588 | vni = tunnel_id_to_key32(info->key.tun_id); | |
2589 | } else { | |
2590 | if (info && info->mode & IP_TUNNEL_INFO_TX) | |
2591 | vxlan_xmit_one(skb, dev, vni, NULL, false); | |
2592 | else | |
2593 | kfree_skb(skb); | |
2594 | return NETDEV_TX_OK; | |
2595 | } | |
47e5d1b0 JB |
2596 | } |
2597 | ||
dc5321d7 | 2598 | if (vxlan->cfg.flags & VXLAN_F_PROXY) { |
47e5d1b0 | 2599 | eth = eth_hdr(skb); |
f564f45c | 2600 | if (ntohs(eth->h_proto) == ETH_P_ARP) |
3ad7a4b1 | 2601 | return arp_reduce(dev, skb, vni); |
f564f45c | 2602 | #if IS_ENABLED(CONFIG_IPV6) |
8bff3685 XL |
2603 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && |
2604 | pskb_may_pull(skb, sizeof(struct ipv6hdr) + | |
2605 | sizeof(struct nd_msg)) && | |
2606 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { | |
2607 | struct nd_msg *m = (struct nd_msg *)(ipv6_hdr(skb) + 1); | |
2608 | ||
2609 | if (m->icmph.icmp6_code == 0 && | |
2610 | m->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
f1fb08f6 | 2611 | return neigh_reduce(dev, skb, vni); |
f564f45c CW |
2612 | } |
2613 | #endif | |
2614 | } | |
6681712d | 2615 | |
47e5d1b0 | 2616 | eth = eth_hdr(skb); |
3ad7a4b1 | 2617 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2618 | did_rsc = false; |
2619 | ||
dc5321d7 | 2620 | if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) && |
e15a00aa CW |
2621 | (ntohs(eth->h_proto) == ETH_P_IP || |
2622 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2623 | did_rsc = route_shortcircuit(dev, skb); |
2624 | if (did_rsc) | |
3ad7a4b1 | 2625 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2626 | } |
2627 | ||
6681712d | 2628 | if (f == NULL) { |
3ad7a4b1 | 2629 | f = vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae | 2630 | if (f == NULL) { |
dc5321d7 | 2631 | if ((vxlan->cfg.flags & VXLAN_F_L2MISS) && |
afbd8bae MR |
2632 | !is_multicast_ether_addr(eth->h_dest)) |
2633 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2634 | ||
2635 | dev->stats.tx_dropped++; | |
8f646c92 | 2636 | kfree_skb(skb); |
afbd8bae MR |
2637 | return NETDEV_TX_OK; |
2638 | } | |
2639 | } | |
6681712d | 2640 | |
afbd8bae MR |
2641 | list_for_each_entry_rcu(rdst, &f->remotes, list) { |
2642 | struct sk_buff *skb1; | |
6681712d | 2643 | |
8f646c92 ED |
2644 | if (!fdst) { |
2645 | fdst = rdst; | |
2646 | continue; | |
2647 | } | |
afbd8bae MR |
2648 | skb1 = skb_clone(skb, GFP_ATOMIC); |
2649 | if (skb1) | |
3ad7a4b1 | 2650 | vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc); |
6681712d DS |
2651 | } |
2652 | ||
8f646c92 | 2653 | if (fdst) |
3ad7a4b1 | 2654 | vxlan_xmit_one(skb, dev, vni, fdst, did_rsc); |
8f646c92 ED |
2655 | else |
2656 | kfree_skb(skb); | |
4ad16930 | 2657 | return NETDEV_TX_OK; |
6681712d DS |
2658 | } |
2659 | ||
d342894c | 2660 | /* Walk the forwarding table and purge stale entries */ |
df7e828c | 2661 | static void vxlan_cleanup(struct timer_list *t) |
d342894c | 2662 | { |
df7e828c | 2663 | struct vxlan_dev *vxlan = from_timer(vxlan, t, age_timer); |
d342894c | 2664 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; |
2665 | unsigned int h; | |
2666 | ||
2667 | if (!netif_running(vxlan->dev)) | |
2668 | return; | |
2669 | ||
d342894c | 2670 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2671 | struct hlist_node *p, *n; | |
14e1d0fa SD |
2672 | |
2673 | spin_lock_bh(&vxlan->hash_lock); | |
d342894c | 2674 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2675 | struct vxlan_fdb *f | |
2676 | = container_of(p, struct vxlan_fdb, hlist); | |
2677 | unsigned long timeout; | |
2678 | ||
efb5f68f | 2679 | if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
d342894c | 2680 | continue; |
2681 | ||
def499c9 RP |
2682 | if (f->flags & NTF_EXT_LEARNED) |
2683 | continue; | |
2684 | ||
0dfbdf41 | 2685 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2686 | if (time_before_eq(timeout, jiffies)) { |
2687 | netdev_dbg(vxlan->dev, | |
2688 | "garbage collect %pM\n", | |
2689 | f->eth_addr); | |
2690 | f->state = NUD_STALE; | |
0e6160f3 | 2691 | vxlan_fdb_destroy(vxlan, f, true, true); |
d342894c | 2692 | } else if (time_before(timeout, next_timer)) |
2693 | next_timer = timeout; | |
2694 | } | |
14e1d0fa | 2695 | spin_unlock_bh(&vxlan->hash_lock); |
d342894c | 2696 | } |
d342894c | 2697 | |
2698 | mod_timer(&vxlan->age_timer, next_timer); | |
2699 | } | |
2700 | ||
a53cb29b MB |
2701 | static void vxlan_vs_del_dev(struct vxlan_dev *vxlan) |
2702 | { | |
2703 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); | |
2704 | ||
2705 | spin_lock(&vn->sock_lock); | |
69e76661 JB |
2706 | hlist_del_init_rcu(&vxlan->hlist4.hlist); |
2707 | #if IS_ENABLED(CONFIG_IPV6) | |
2708 | hlist_del_init_rcu(&vxlan->hlist6.hlist); | |
2709 | #endif | |
a53cb29b MB |
2710 | spin_unlock(&vn->sock_lock); |
2711 | } | |
2712 | ||
69e76661 JB |
2713 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan, |
2714 | struct vxlan_dev_node *node) | |
9c2e24e1 | 2715 | { |
56ef9c90 | 2716 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
54bfd872 | 2717 | __be32 vni = vxlan->default_dst.remote_vni; |
9c2e24e1 | 2718 | |
69e76661 | 2719 | node->vxlan = vxlan; |
56ef9c90 | 2720 | spin_lock(&vn->sock_lock); |
69e76661 | 2721 | hlist_add_head_rcu(&node->hlist, vni_head(vs, vni)); |
56ef9c90 | 2722 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
2723 | } |
2724 | ||
d342894c | 2725 | /* Setup stats when device is created */ |
2726 | static int vxlan_init(struct net_device *dev) | |
2727 | { | |
1c213bd2 | 2728 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 2729 | if (!dev->tstats) |
d342894c | 2730 | return -ENOMEM; |
2731 | ||
2732 | return 0; | |
2733 | } | |
2734 | ||
3ad7a4b1 | 2735 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni) |
afbd8bae MR |
2736 | { |
2737 | struct vxlan_fdb *f; | |
2738 | ||
2739 | spin_lock_bh(&vxlan->hash_lock); | |
3ad7a4b1 | 2740 | f = __vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae | 2741 | if (f) |
0e6160f3 | 2742 | vxlan_fdb_destroy(vxlan, f, true, true); |
afbd8bae MR |
2743 | spin_unlock_bh(&vxlan->hash_lock); |
2744 | } | |
2745 | ||
ebf4063e SH |
2746 | static void vxlan_uninit(struct net_device *dev) |
2747 | { | |
2748 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 2749 | |
3ad7a4b1 | 2750 | vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni); |
afbd8bae | 2751 | |
ebf4063e SH |
2752 | free_percpu(dev->tstats); |
2753 | } | |
2754 | ||
d342894c | 2755 | /* Start ageing timer and join group when device is brought up */ |
2756 | static int vxlan_open(struct net_device *dev) | |
2757 | { | |
2758 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
205f356d | 2759 | int ret; |
56ef9c90 | 2760 | |
205f356d JB |
2761 | ret = vxlan_sock_add(vxlan); |
2762 | if (ret < 0) | |
2763 | return ret; | |
d342894c | 2764 | |
79d4a94f | 2765 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 | 2766 | ret = vxlan_igmp_join(vxlan); |
bef0057b MRL |
2767 | if (ret == -EADDRINUSE) |
2768 | ret = 0; | |
56ef9c90 | 2769 | if (ret) { |
205f356d | 2770 | vxlan_sock_release(vxlan); |
56ef9c90 MRL |
2771 | return ret; |
2772 | } | |
d342894c | 2773 | } |
2774 | ||
0dfbdf41 | 2775 | if (vxlan->cfg.age_interval) |
d342894c | 2776 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
2777 | ||
56ef9c90 | 2778 | return ret; |
d342894c | 2779 | } |
2780 | ||
2781 | /* Purge the forwarding table */ | |
8b3f9337 | 2782 | static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all) |
d342894c | 2783 | { |
31fec5aa | 2784 | unsigned int h; |
d342894c | 2785 | |
2786 | spin_lock_bh(&vxlan->hash_lock); | |
2787 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
2788 | struct hlist_node *p, *n; | |
2789 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { | |
2790 | struct vxlan_fdb *f | |
2791 | = container_of(p, struct vxlan_fdb, hlist); | |
8b3f9337 RP |
2792 | if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP))) |
2793 | continue; | |
afbd8bae MR |
2794 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
2795 | if (!is_zero_ether_addr(f->eth_addr)) | |
0e6160f3 | 2796 | vxlan_fdb_destroy(vxlan, f, true, true); |
d342894c | 2797 | } |
2798 | } | |
2799 | spin_unlock_bh(&vxlan->hash_lock); | |
2800 | } | |
2801 | ||
2802 | /* Cleanup timer and forwarding table on shutdown */ | |
2803 | static int vxlan_stop(struct net_device *dev) | |
2804 | { | |
2805 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 2806 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
56ef9c90 | 2807 | int ret = 0; |
d342894c | 2808 | |
24c0e683 | 2809 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 2810 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 2811 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 2812 | |
2813 | del_timer_sync(&vxlan->age_timer); | |
2814 | ||
8b3f9337 | 2815 | vxlan_flush(vxlan, false); |
205f356d | 2816 | vxlan_sock_release(vxlan); |
d342894c | 2817 | |
56ef9c90 | 2818 | return ret; |
d342894c | 2819 | } |
2820 | ||
d342894c | 2821 | /* Stub, nothing needs to be done. */ |
2822 | static void vxlan_set_multicast_list(struct net_device *dev) | |
2823 | { | |
2824 | } | |
2825 | ||
91572088 | 2826 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
345010b5 | 2827 | { |
91572088 JW |
2828 | struct vxlan_dev *vxlan = netdev_priv(dev); |
2829 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
2830 | struct net_device *lowerdev = __dev_get_by_index(vxlan->net, | |
2831 | dst->remote_ifindex); | |
ce44a4ae | 2832 | bool use_ipv6 = !!(vxlan->cfg.flags & VXLAN_F_IPV6); |
345010b5 | 2833 | |
91572088 JW |
2834 | /* This check is different than dev->max_mtu, because it looks at |
2835 | * the lowerdev->mtu, rather than the static dev->max_mtu | |
2836 | */ | |
2837 | if (lowerdev) { | |
2838 | int max_mtu = lowerdev->mtu - | |
2839 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); | |
2840 | if (new_mtu > max_mtu) | |
72564b59 | 2841 | return -EINVAL; |
72564b59 DW |
2842 | } |
2843 | ||
345010b5 DB |
2844 | dev->mtu = new_mtu; |
2845 | return 0; | |
2846 | } | |
2847 | ||
fc4099f1 PS |
2848 | static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
2849 | { | |
2850 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2851 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
2852 | __be16 sport, dport; | |
2853 | ||
2854 | sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, | |
2855 | vxlan->cfg.port_max, true); | |
2856 | dport = info->key.tp_dst ? : vxlan->cfg.dst_port; | |
2857 | ||
239e944f | 2858 | if (ip_tunnel_info_af(info) == AF_INET) { |
c6fcc4fc | 2859 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
1a8496ba JB |
2860 | struct rtable *rt; |
2861 | ||
655c3de1 | 2862 | rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos, |
1a8496ba | 2863 | info->key.u.ipv4.dst, |
22f0708a PA |
2864 | &info->key.u.ipv4.src, dport, sport, |
2865 | &info->dst_cache, info); | |
1a8496ba JB |
2866 | if (IS_ERR(rt)) |
2867 | return PTR_ERR(rt); | |
2868 | ip_rt_put(rt); | |
239e944f JB |
2869 | } else { |
2870 | #if IS_ENABLED(CONFIG_IPV6) | |
03dc52a8 | 2871 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
239e944f JB |
2872 | struct dst_entry *ndst; |
2873 | ||
655c3de1 | 2874 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos, |
e7f70af1 | 2875 | info->key.label, &info->key.u.ipv6.dst, |
22f0708a PA |
2876 | &info->key.u.ipv6.src, dport, sport, |
2877 | &info->dst_cache, info); | |
239e944f JB |
2878 | if (IS_ERR(ndst)) |
2879 | return PTR_ERR(ndst); | |
2880 | dst_release(ndst); | |
239e944f JB |
2881 | #else /* !CONFIG_IPV6 */ |
2882 | return -EPFNOSUPPORT; | |
2883 | #endif | |
2884 | } | |
1a8496ba JB |
2885 | info->key.tp_src = sport; |
2886 | info->key.tp_dst = dport; | |
239e944f | 2887 | return 0; |
fc4099f1 PS |
2888 | } |
2889 | ||
0c867c9b | 2890 | static const struct net_device_ops vxlan_netdev_ether_ops = { |
d342894c | 2891 | .ndo_init = vxlan_init, |
ebf4063e | 2892 | .ndo_uninit = vxlan_uninit, |
d342894c | 2893 | .ndo_open = vxlan_open, |
2894 | .ndo_stop = vxlan_stop, | |
2895 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 2896 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 2897 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 2898 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 2899 | .ndo_validate_addr = eth_validate_addr, |
2900 | .ndo_set_mac_address = eth_mac_addr, | |
2901 | .ndo_fdb_add = vxlan_fdb_add, | |
2902 | .ndo_fdb_del = vxlan_fdb_delete, | |
2903 | .ndo_fdb_dump = vxlan_fdb_dump, | |
474c3c89 | 2904 | .ndo_fdb_get = vxlan_fdb_get, |
fc4099f1 | 2905 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
d342894c | 2906 | }; |
2907 | ||
e1e5314d JB |
2908 | static const struct net_device_ops vxlan_netdev_raw_ops = { |
2909 | .ndo_init = vxlan_init, | |
2910 | .ndo_uninit = vxlan_uninit, | |
2911 | .ndo_open = vxlan_open, | |
2912 | .ndo_stop = vxlan_stop, | |
2913 | .ndo_start_xmit = vxlan_xmit, | |
2914 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
2915 | .ndo_change_mtu = vxlan_change_mtu, | |
2916 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, | |
2917 | }; | |
2918 | ||
d342894c | 2919 | /* Info for udev, that this is a virtual tunnel endpoint */ |
2920 | static struct device_type vxlan_type = { | |
2921 | .name = "vxlan", | |
2922 | }; | |
2923 | ||
e5de25dc | 2924 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
35e42379 | 2925 | * supply the listening VXLAN udp ports. Callers are expected |
e5de25dc | 2926 | * to implement the ndo_udp_tunnel_add. |
53cf5275 | 2927 | */ |
2d2b13fc | 2928 | static void vxlan_offload_rx_ports(struct net_device *dev, bool push) |
53cf5275 JG |
2929 | { |
2930 | struct vxlan_sock *vs; | |
2931 | struct net *net = dev_net(dev); | |
2932 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
35e42379 | 2933 | unsigned int i; |
53cf5275 JG |
2934 | |
2935 | spin_lock(&vn->sock_lock); | |
2936 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
2d2b13fc SD |
2937 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
2938 | unsigned short type; | |
2939 | ||
2940 | if (vs->flags & VXLAN_F_GPE) | |
2941 | type = UDP_TUNNEL_TYPE_VXLAN_GPE; | |
2942 | else | |
2943 | type = UDP_TUNNEL_TYPE_VXLAN; | |
2944 | ||
2945 | if (push) | |
2946 | udp_tunnel_push_rx_port(dev, vs->sock, type); | |
2947 | else | |
2948 | udp_tunnel_drop_rx_port(dev, vs->sock, type); | |
2949 | } | |
53cf5275 JG |
2950 | } |
2951 | spin_unlock(&vn->sock_lock); | |
2952 | } | |
53cf5275 | 2953 | |
d342894c | 2954 | /* Initialize the device structure. */ |
2955 | static void vxlan_setup(struct net_device *dev) | |
2956 | { | |
2957 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 2958 | unsigned int h; |
d342894c | 2959 | |
65226ef8 JB |
2960 | eth_hw_addr_random(dev); |
2961 | ether_setup(dev); | |
2962 | ||
cf124db5 | 2963 | dev->needs_free_netdev = true; |
d342894c | 2964 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
2965 | ||
d342894c | 2966 | dev->features |= NETIF_F_LLTX; |
d6727fe3 | 2967 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 2968 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 2969 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 2970 | |
1eaa8178 | 2971 | dev->vlan_features = dev->features; |
0afb1666 | 2972 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 2973 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
02875878 | 2974 | netif_keep_dst(dev); |
0c867c9b | 2975 | dev->priv_flags |= IFF_NO_QUEUE; |
d342894c | 2976 | |
a985343b MS |
2977 | /* MTU range: 68 - 65535 */ |
2978 | dev->min_mtu = ETH_MIN_MTU; | |
2979 | dev->max_mtu = ETH_MAX_MTU; | |
2980 | ||
553675fb | 2981 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 2982 | spin_lock_init(&vxlan->hash_lock); |
2983 | ||
df7e828c | 2984 | timer_setup(&vxlan->age_timer, vxlan_cleanup, TIMER_DEFERRABLE); |
d342894c | 2985 | |
2986 | vxlan->dev = dev; | |
2987 | ||
58ce31cc TH |
2988 | gro_cells_init(&vxlan->gro_cells, dev); |
2989 | ||
d342894c | 2990 | for (h = 0; h < FDB_HASH_SIZE; ++h) |
2991 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); | |
2992 | } | |
2993 | ||
0c867c9b JB |
2994 | static void vxlan_ether_setup(struct net_device *dev) |
2995 | { | |
0c867c9b JB |
2996 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
2997 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
2998 | dev->netdev_ops = &vxlan_netdev_ether_ops; | |
2999 | } | |
3000 | ||
e1e5314d JB |
3001 | static void vxlan_raw_setup(struct net_device *dev) |
3002 | { | |
65226ef8 | 3003 | dev->header_ops = NULL; |
e1e5314d JB |
3004 | dev->type = ARPHRD_NONE; |
3005 | dev->hard_header_len = 0; | |
3006 | dev->addr_len = 0; | |
e1e5314d JB |
3007 | dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; |
3008 | dev->netdev_ops = &vxlan_netdev_raw_ops; | |
3009 | } | |
3010 | ||
d342894c | 3011 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { |
3012 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
5d174dd8 | 3013 | [IFLA_VXLAN_GROUP] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
e4c7ed41 | 3014 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 3015 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
3016 | [IFLA_VXLAN_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
e4c7ed41 | 3017 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 3018 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
3019 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
e7f70af1 | 3020 | [IFLA_VXLAN_LABEL] = { .type = NLA_U32 }, |
d342894c | 3021 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, |
3022 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
3023 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 3024 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
3025 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
3026 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
3027 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
3028 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
f8a9b1bc | 3029 | [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
823aa873 | 3030 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
3031 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
3032 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
3033 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
3034 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
3035 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 3036 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
e1e5314d | 3037 | [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, }, |
0ace2ca8 | 3038 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
72f6d71e | 3039 | [IFLA_VXLAN_TTL_INHERIT] = { .type = NLA_FLAG }, |
b4d30697 | 3040 | [IFLA_VXLAN_DF] = { .type = NLA_U8 }, |
d342894c | 3041 | }; |
3042 | ||
a8b8a889 MS |
3043 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[], |
3044 | struct netlink_ext_ack *extack) | |
d342894c | 3045 | { |
3046 | if (tb[IFLA_ADDRESS]) { | |
3047 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
653ef6a3 GM |
3048 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], |
3049 | "Provided link layer address is not Ethernet"); | |
d342894c | 3050 | return -EINVAL; |
3051 | } | |
3052 | ||
3053 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
653ef6a3 GM |
3054 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], |
3055 | "Provided Ethernet address is not unicast"); | |
d342894c | 3056 | return -EADDRNOTAVAIL; |
3057 | } | |
3058 | } | |
3059 | ||
a985343b | 3060 | if (tb[IFLA_MTU]) { |
019b13ae | 3061 | u32 mtu = nla_get_u32(tb[IFLA_MTU]); |
a985343b | 3062 | |
653ef6a3 GM |
3063 | if (mtu < ETH_MIN_MTU || mtu > ETH_MAX_MTU) { |
3064 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_MTU], | |
3065 | "MTU must be between 68 and 65535"); | |
a985343b | 3066 | return -EINVAL; |
653ef6a3 | 3067 | } |
a985343b MS |
3068 | } |
3069 | ||
653ef6a3 GM |
3070 | if (!data) { |
3071 | NL_SET_ERR_MSG(extack, | |
3072 | "Required attributes not provided to perform the operation"); | |
d342894c | 3073 | return -EINVAL; |
653ef6a3 | 3074 | } |
d342894c | 3075 | |
3076 | if (data[IFLA_VXLAN_ID]) { | |
a985343b MS |
3077 | u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); |
3078 | ||
653ef6a3 GM |
3079 | if (id >= VXLAN_N_VID) { |
3080 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_ID], | |
3081 | "VXLAN ID must be lower than 16777216"); | |
d342894c | 3082 | return -ERANGE; |
653ef6a3 | 3083 | } |
d342894c | 3084 | } |
3085 | ||
05f47d69 | 3086 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
3087 | const struct ifla_vxlan_port_range *p | |
3088 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
3089 | ||
3090 | if (ntohs(p->high) < ntohs(p->low)) { | |
653ef6a3 GM |
3091 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT_RANGE], |
3092 | "Invalid source port range"); | |
05f47d69 | 3093 | return -EINVAL; |
3094 | } | |
3095 | } | |
3096 | ||
b4d30697 SB |
3097 | if (data[IFLA_VXLAN_DF]) { |
3098 | enum ifla_vxlan_df df = nla_get_u8(data[IFLA_VXLAN_DF]); | |
3099 | ||
3100 | if (df < 0 || df > VXLAN_DF_MAX) { | |
3101 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_DF], | |
3102 | "Invalid DF attribute"); | |
3103 | return -EINVAL; | |
3104 | } | |
3105 | } | |
3106 | ||
d342894c | 3107 | return 0; |
3108 | } | |
3109 | ||
1b13c97f YB |
3110 | static void vxlan_get_drvinfo(struct net_device *netdev, |
3111 | struct ethtool_drvinfo *drvinfo) | |
3112 | { | |
3113 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
3114 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
3115 | } | |
3116 | ||
3117 | static const struct ethtool_ops vxlan_ethtool_ops = { | |
3118 | .get_drvinfo = vxlan_get_drvinfo, | |
3119 | .get_link = ethtool_op_get_link, | |
3120 | }; | |
3121 | ||
3ee64f39 | 3122 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
aab8cc36 | 3123 | __be16 port, u32 flags, int ifindex) |
553675fb | 3124 | { |
e4c7ed41 | 3125 | struct socket *sock; |
3ee64f39 TH |
3126 | struct udp_port_cfg udp_conf; |
3127 | int err; | |
e4c7ed41 | 3128 | |
3ee64f39 | 3129 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 3130 | |
3ee64f39 TH |
3131 | if (ipv6) { |
3132 | udp_conf.family = AF_INET6; | |
3ee64f39 | 3133 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 3134 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
a43a9ef6 | 3135 | udp_conf.ipv6_v6only = 1; |
3ee64f39 TH |
3136 | } else { |
3137 | udp_conf.family = AF_INET; | |
e4c7ed41 | 3138 | } |
e4c7ed41 | 3139 | |
3ee64f39 | 3140 | udp_conf.local_udp_port = port; |
aab8cc36 | 3141 | udp_conf.bind_ifindex = ifindex; |
553675fb | 3142 | |
3ee64f39 TH |
3143 | /* Open UDP socket */ |
3144 | err = udp_sock_create(net, &udp_conf, &sock); | |
3145 | if (err < 0) | |
3146 | return ERR_PTR(err); | |
e4c7ed41 | 3147 | |
39deb2c7 | 3148 | return sock; |
e4c7ed41 CW |
3149 | } |
3150 | ||
3151 | /* Create new listen socket if needed */ | |
b1be00a6 | 3152 | static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6, |
aab8cc36 AB |
3153 | __be16 port, u32 flags, |
3154 | int ifindex) | |
e4c7ed41 CW |
3155 | { |
3156 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3157 | struct vxlan_sock *vs; | |
3158 | struct socket *sock; | |
e4c7ed41 | 3159 | unsigned int h; |
acbf74a7 | 3160 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 3161 | |
dc01e7d3 | 3162 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
3163 | if (!vs) |
3164 | return ERR_PTR(-ENOMEM); | |
3165 | ||
3166 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
3167 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
3168 | ||
aab8cc36 | 3169 | sock = vxlan_create_sock(net, ipv6, port, flags, ifindex); |
39deb2c7 | 3170 | if (IS_ERR(sock)) { |
553675fb | 3171 | kfree(vs); |
e50fddc8 | 3172 | return ERR_CAST(sock); |
553675fb | 3173 | } |
e4c7ed41 CW |
3174 | |
3175 | vs->sock = sock; | |
66af846f | 3176 | refcount_set(&vs->refcnt, 1); |
af33c1ad | 3177 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 3178 | |
9c2e24e1 PS |
3179 | spin_lock(&vn->sock_lock); |
3180 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
e7b3db5e | 3181 | udp_tunnel_notify_add_rx_port(sock, |
b9adcd69 AD |
3182 | (vs->flags & VXLAN_F_GPE) ? |
3183 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 3184 | UDP_TUNNEL_TYPE_VXLAN); |
9c2e24e1 | 3185 | spin_unlock(&vn->sock_lock); |
553675fb | 3186 | |
3187 | /* Mark socket as an encapsulation socket. */ | |
5602c48c | 3188 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
acbf74a7 AZ |
3189 | tunnel_cfg.sk_user_data = vs; |
3190 | tunnel_cfg.encap_type = 1; | |
f2d1968e | 3191 | tunnel_cfg.encap_rcv = vxlan_rcv; |
c3a43b9f | 3192 | tunnel_cfg.encap_err_lookup = vxlan_err_lookup; |
acbf74a7 | 3193 | tunnel_cfg.encap_destroy = NULL; |
5602c48c TH |
3194 | tunnel_cfg.gro_receive = vxlan_gro_receive; |
3195 | tunnel_cfg.gro_complete = vxlan_gro_complete; | |
acbf74a7 AZ |
3196 | |
3197 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 3198 | |
9c2e24e1 PS |
3199 | return vs; |
3200 | } | |
3201 | ||
b1be00a6 | 3202 | static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6) |
9c2e24e1 | 3203 | { |
205f356d JB |
3204 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
3205 | struct vxlan_sock *vs = NULL; | |
69e76661 | 3206 | struct vxlan_dev_node *node; |
aab8cc36 AB |
3207 | int l3mdev_index = 0; |
3208 | ||
3209 | if (vxlan->cfg.remote_ifindex) | |
3210 | l3mdev_index = l3mdev_master_upper_ifindex_by_index( | |
3211 | vxlan->net, vxlan->cfg.remote_ifindex); | |
9c2e24e1 | 3212 | |
205f356d | 3213 | if (!vxlan->cfg.no_share) { |
56ef9c90 | 3214 | spin_lock(&vn->sock_lock); |
205f356d | 3215 | vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
aab8cc36 AB |
3216 | vxlan->cfg.dst_port, vxlan->cfg.flags, |
3217 | l3mdev_index); | |
66af846f | 3218 | if (vs && !refcount_inc_not_zero(&vs->refcnt)) { |
56ef9c90 | 3219 | spin_unlock(&vn->sock_lock); |
205f356d | 3220 | return -EBUSY; |
56ef9c90 MRL |
3221 | } |
3222 | spin_unlock(&vn->sock_lock); | |
3223 | } | |
205f356d | 3224 | if (!vs) |
b1be00a6 | 3225 | vs = vxlan_socket_create(vxlan->net, ipv6, |
aab8cc36 AB |
3226 | vxlan->cfg.dst_port, vxlan->cfg.flags, |
3227 | l3mdev_index); | |
205f356d JB |
3228 | if (IS_ERR(vs)) |
3229 | return PTR_ERR(vs); | |
b1be00a6 | 3230 | #if IS_ENABLED(CONFIG_IPV6) |
69e76661 | 3231 | if (ipv6) { |
c6fcc4fc | 3232 | rcu_assign_pointer(vxlan->vn6_sock, vs); |
69e76661 JB |
3233 | node = &vxlan->hlist6; |
3234 | } else | |
b1be00a6 | 3235 | #endif |
69e76661 | 3236 | { |
c6fcc4fc | 3237 | rcu_assign_pointer(vxlan->vn4_sock, vs); |
69e76661 JB |
3238 | node = &vxlan->hlist4; |
3239 | } | |
3240 | vxlan_vs_add_dev(vs, vxlan, node); | |
205f356d | 3241 | return 0; |
553675fb | 3242 | } |
3243 | ||
b1be00a6 JB |
3244 | static int vxlan_sock_add(struct vxlan_dev *vxlan) |
3245 | { | |
dc5321d7 MS |
3246 | bool metadata = vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA; |
3247 | bool ipv6 = vxlan->cfg.flags & VXLAN_F_IPV6 || metadata; | |
d074bf96 | 3248 | bool ipv4 = !ipv6 || metadata; |
b1be00a6 JB |
3249 | int ret = 0; |
3250 | ||
c6fcc4fc | 3251 | RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
b1be00a6 | 3252 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 3253 | RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
d074bf96 | 3254 | if (ipv6) { |
b1be00a6 | 3255 | ret = __vxlan_sock_add(vxlan, true); |
d074bf96 JB |
3256 | if (ret < 0 && ret != -EAFNOSUPPORT) |
3257 | ipv4 = false; | |
3258 | } | |
b1be00a6 | 3259 | #endif |
d074bf96 | 3260 | if (ipv4) |
b1be00a6 JB |
3261 | ret = __vxlan_sock_add(vxlan, false); |
3262 | if (ret < 0) | |
3263 | vxlan_sock_release(vxlan); | |
3264 | return ret; | |
3265 | } | |
3266 | ||
a985343b MS |
3267 | static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf, |
3268 | struct net_device **lower, | |
653ef6a3 GM |
3269 | struct vxlan_dev *old, |
3270 | struct netlink_ext_ack *extack) | |
d342894c | 3271 | { |
33564bbb | 3272 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
a985343b | 3273 | struct vxlan_dev *tmp; |
e4c7ed41 | 3274 | bool use_ipv6 = false; |
d342894c | 3275 | |
a985343b MS |
3276 | if (conf->flags & VXLAN_F_GPE) { |
3277 | /* For now, allow GPE only together with | |
3278 | * COLLECT_METADATA. This can be relaxed later; in such | |
3279 | * case, the other side of the PtP link will have to be | |
3280 | * provided. | |
3281 | */ | |
3282 | if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) || | |
3283 | !(conf->flags & VXLAN_F_COLLECT_METADATA)) { | |
653ef6a3 GM |
3284 | NL_SET_ERR_MSG(extack, |
3285 | "VXLAN GPE does not support this combination of attributes"); | |
a985343b | 3286 | return -EINVAL; |
3555621d | 3287 | } |
e1e5314d | 3288 | } |
0c867c9b | 3289 | |
ce44a4ae MS |
3290 | if (!conf->remote_ip.sa.sa_family && !conf->saddr.sa.sa_family) { |
3291 | /* Unless IPv6 is explicitly requested, assume IPv4 */ | |
a985343b | 3292 | conf->remote_ip.sa.sa_family = AF_INET; |
ce44a4ae MS |
3293 | conf->saddr.sa.sa_family = AF_INET; |
3294 | } else if (!conf->remote_ip.sa.sa_family) { | |
3295 | conf->remote_ip.sa.sa_family = conf->saddr.sa.sa_family; | |
3296 | } else if (!conf->saddr.sa.sa_family) { | |
3297 | conf->saddr.sa.sa_family = conf->remote_ip.sa.sa_family; | |
3298 | } | |
3299 | ||
653ef6a3 GM |
3300 | if (conf->saddr.sa.sa_family != conf->remote_ip.sa.sa_family) { |
3301 | NL_SET_ERR_MSG(extack, | |
3302 | "Local and remote address must be from the same family"); | |
ce44a4ae | 3303 | return -EINVAL; |
653ef6a3 | 3304 | } |
e4c7ed41 | 3305 | |
653ef6a3 GM |
3306 | if (vxlan_addr_multicast(&conf->saddr)) { |
3307 | NL_SET_ERR_MSG(extack, "Local address cannot be multicast"); | |
0f22a3c6 | 3308 | return -EINVAL; |
653ef6a3 | 3309 | } |
0f22a3c6 | 3310 | |
ce44a4ae | 3311 | if (conf->saddr.sa.sa_family == AF_INET6) { |
653ef6a3 GM |
3312 | if (!IS_ENABLED(CONFIG_IPV6)) { |
3313 | NL_SET_ERR_MSG(extack, | |
3314 | "IPv6 support not enabled in the kernel"); | |
057ba29b | 3315 | return -EPFNOSUPPORT; |
653ef6a3 | 3316 | } |
e4c7ed41 | 3317 | use_ipv6 = true; |
a985343b | 3318 | conf->flags |= VXLAN_F_IPV6; |
0f22a3c6 MS |
3319 | |
3320 | if (!(conf->flags & VXLAN_F_COLLECT_METADATA)) { | |
3321 | int local_type = | |
3322 | ipv6_addr_type(&conf->saddr.sin6.sin6_addr); | |
3323 | int remote_type = | |
3324 | ipv6_addr_type(&conf->remote_ip.sin6.sin6_addr); | |
3325 | ||
3326 | if (local_type & IPV6_ADDR_LINKLOCAL) { | |
3327 | if (!(remote_type & IPV6_ADDR_LINKLOCAL) && | |
653ef6a3 GM |
3328 | (remote_type != IPV6_ADDR_ANY)) { |
3329 | NL_SET_ERR_MSG(extack, | |
3330 | "Invalid combination of local and remote address scopes"); | |
0f22a3c6 | 3331 | return -EINVAL; |
653ef6a3 | 3332 | } |
0f22a3c6 MS |
3333 | |
3334 | conf->flags |= VXLAN_F_IPV6_LINKLOCAL; | |
3335 | } else { | |
3336 | if (remote_type == | |
653ef6a3 GM |
3337 | (IPV6_ADDR_UNICAST | IPV6_ADDR_LINKLOCAL)) { |
3338 | NL_SET_ERR_MSG(extack, | |
3339 | "Invalid combination of local and remote address scopes"); | |
0f22a3c6 | 3340 | return -EINVAL; |
653ef6a3 | 3341 | } |
0f22a3c6 MS |
3342 | |
3343 | conf->flags &= ~VXLAN_F_IPV6_LINKLOCAL; | |
3344 | } | |
3345 | } | |
057ba29b | 3346 | } |
d342894c | 3347 | |
653ef6a3 GM |
3348 | if (conf->label && !use_ipv6) { |
3349 | NL_SET_ERR_MSG(extack, | |
3350 | "Label attribute only applies to IPv6 VXLAN devices"); | |
e7f70af1 | 3351 | return -EINVAL; |
653ef6a3 | 3352 | } |
e7f70af1 | 3353 | |
a985343b MS |
3354 | if (conf->remote_ifindex) { |
3355 | struct net_device *lowerdev; | |
34e02aa1 | 3356 | |
a985343b | 3357 | lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex); |
653ef6a3 GM |
3358 | if (!lowerdev) { |
3359 | NL_SET_ERR_MSG(extack, | |
3360 | "Invalid local interface, device not found"); | |
34e02aa1 | 3361 | return -ENODEV; |
653ef6a3 | 3362 | } |
d342894c | 3363 | |
e4c7ed41 CW |
3364 | #if IS_ENABLED(CONFIG_IPV6) |
3365 | if (use_ipv6) { | |
3366 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
653ef6a3 GM |
3367 | if (idev && idev->cnf.disable_ipv6) { |
3368 | NL_SET_ERR_MSG(extack, | |
3369 | "IPv6 support disabled by administrator"); | |
e4c7ed41 | 3370 | return -EPERM; |
653ef6a3 | 3371 | } |
e4c7ed41 CW |
3372 | } |
3373 | #endif | |
3374 | ||
a985343b MS |
3375 | *lower = lowerdev; |
3376 | } else { | |
653ef6a3 GM |
3377 | if (vxlan_addr_multicast(&conf->remote_ip)) { |
3378 | NL_SET_ERR_MSG(extack, | |
3379 | "Local interface required for multicast remote destination"); | |
3380 | ||
a985343b | 3381 | return -EINVAL; |
653ef6a3 | 3382 | } |
1ba56fb4 | 3383 | |
0f22a3c6 | 3384 | #if IS_ENABLED(CONFIG_IPV6) |
653ef6a3 GM |
3385 | if (conf->flags & VXLAN_F_IPV6_LINKLOCAL) { |
3386 | NL_SET_ERR_MSG(extack, | |
3387 | "Local interface required for link-local local/remote addresses"); | |
0f22a3c6 | 3388 | return -EINVAL; |
653ef6a3 | 3389 | } |
0f22a3c6 MS |
3390 | #endif |
3391 | ||
a985343b | 3392 | *lower = NULL; |
9dc2ad10 | 3393 | } |
d342894c | 3394 | |
a985343b MS |
3395 | if (!conf->dst_port) { |
3396 | if (conf->flags & VXLAN_F_GPE) | |
3397 | conf->dst_port = htons(4790); /* IANA VXLAN-GPE port */ | |
3398 | else | |
3399 | conf->dst_port = htons(vxlan_port); | |
d6acfeb1 FM |
3400 | } |
3401 | ||
a985343b MS |
3402 | if (!conf->age_interval) |
3403 | conf->age_interval = FDB_AGE_DEFAULT; | |
91572088 | 3404 | |
a985343b MS |
3405 | list_for_each_entry(tmp, &vn->vxlan_list, next) { |
3406 | if (tmp == old) | |
3407 | continue; | |
91572088 | 3408 | |
49f810f0 MS |
3409 | if (tmp->cfg.vni != conf->vni) |
3410 | continue; | |
3411 | if (tmp->cfg.dst_port != conf->dst_port) | |
3412 | continue; | |
3413 | if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) != | |
ce44a4ae | 3414 | (conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6))) |
49f810f0 MS |
3415 | continue; |
3416 | ||
3417 | if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) && | |
3418 | tmp->cfg.remote_ifindex != conf->remote_ifindex) | |
3419 | continue; | |
3420 | ||
653ef6a3 GM |
3421 | NL_SET_ERR_MSG(extack, |
3422 | "A VXLAN device with the specified VNI already exists"); | |
49f810f0 | 3423 | return -EEXIST; |
a985343b | 3424 | } |
91572088 | 3425 | |
a985343b MS |
3426 | return 0; |
3427 | } | |
3428 | ||
3429 | static void vxlan_config_apply(struct net_device *dev, | |
3430 | struct vxlan_config *conf, | |
889ce937 SD |
3431 | struct net_device *lowerdev, |
3432 | struct net *src_net, | |
3433 | bool changelink) | |
a985343b MS |
3434 | { |
3435 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3436 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3437 | unsigned short needed_headroom = ETH_HLEN; | |
3438 | bool use_ipv6 = !!(conf->flags & VXLAN_F_IPV6); | |
3439 | int max_mtu = ETH_MAX_MTU; | |
3440 | ||
3441 | if (!changelink) { | |
3442 | if (conf->flags & VXLAN_F_GPE) | |
3443 | vxlan_raw_setup(dev); | |
3444 | else | |
3445 | vxlan_ether_setup(dev); | |
3446 | ||
3447 | if (conf->mtu) | |
3448 | dev->mtu = conf->mtu; | |
889ce937 SD |
3449 | |
3450 | vxlan->net = src_net; | |
a985343b MS |
3451 | } |
3452 | ||
3453 | dst->remote_vni = conf->vni; | |
3454 | ||
3455 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); | |
3456 | ||
3457 | if (lowerdev) { | |
3458 | dst->remote_ifindex = conf->remote_ifindex; | |
3459 | ||
3460 | dev->gso_max_size = lowerdev->gso_max_size; | |
3461 | dev->gso_max_segs = lowerdev->gso_max_segs; | |
91572088 | 3462 | |
a985343b | 3463 | needed_headroom = lowerdev->hard_header_len; |
91572088 | 3464 | |
a985343b MS |
3465 | max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : |
3466 | VXLAN_HEADROOM); | |
f870c1ff AK |
3467 | if (max_mtu < ETH_MIN_MTU) |
3468 | max_mtu = ETH_MIN_MTU; | |
3469 | ||
3470 | if (!changelink && !conf->mtu) | |
3471 | dev->mtu = max_mtu; | |
7e059158 DW |
3472 | } |
3473 | ||
a985343b MS |
3474 | if (dev->mtu > max_mtu) |
3475 | dev->mtu = max_mtu; | |
3476 | ||
b1be00a6 JB |
3477 | if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) |
3478 | needed_headroom += VXLAN6_HEADROOM; | |
3479 | else | |
3480 | needed_headroom += VXLAN_HEADROOM; | |
3481 | dev->needed_headroom = needed_headroom; | |
3482 | ||
0dfbdf41 | 3483 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
a985343b | 3484 | } |
0dfbdf41 | 3485 | |
a985343b | 3486 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
653ef6a3 GM |
3487 | struct vxlan_config *conf, bool changelink, |
3488 | struct netlink_ext_ack *extack) | |
a985343b MS |
3489 | { |
3490 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3491 | struct net_device *lowerdev; | |
3492 | int ret; | |
0dfbdf41 | 3493 | |
653ef6a3 | 3494 | ret = vxlan_config_validate(src_net, conf, &lowerdev, vxlan, extack); |
a985343b MS |
3495 | if (ret) |
3496 | return ret; | |
8bcdc4f3 | 3497 | |
889ce937 | 3498 | vxlan_config_apply(dev, conf, lowerdev, src_net, changelink); |
0dfbdf41 | 3499 | |
0dfbdf41 TG |
3500 | return 0; |
3501 | } | |
3502 | ||
c80498e3 | 3503 | static int __vxlan_dev_create(struct net *net, struct net_device *dev, |
653ef6a3 GM |
3504 | struct vxlan_config *conf, |
3505 | struct netlink_ext_ack *extack) | |
c80498e3 ND |
3506 | { |
3507 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3508 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
0241b836 | 3509 | struct vxlan_fdb *f = NULL; |
6db92468 | 3510 | bool unregister = false; |
c80498e3 ND |
3511 | int err; |
3512 | ||
653ef6a3 | 3513 | err = vxlan_dev_configure(net, dev, conf, false, extack); |
c80498e3 ND |
3514 | if (err) |
3515 | return err; | |
3516 | ||
3517 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
3518 | ||
3519 | /* create an fdb entry for a valid default destination */ | |
3520 | if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) { | |
0241b836 | 3521 | err = vxlan_fdb_create(vxlan, all_zeros_mac, |
c80498e3 ND |
3522 | &vxlan->default_dst.remote_ip, |
3523 | NUD_REACHABLE | NUD_PERMANENT, | |
c80498e3 ND |
3524 | vxlan->cfg.dst_port, |
3525 | vxlan->default_dst.remote_vni, | |
3526 | vxlan->default_dst.remote_vni, | |
3527 | vxlan->default_dst.remote_ifindex, | |
0241b836 | 3528 | NTF_SELF, &f); |
c80498e3 ND |
3529 | if (err) |
3530 | return err; | |
3531 | } | |
3532 | ||
3533 | err = register_netdevice(dev); | |
0241b836 RP |
3534 | if (err) |
3535 | goto errout; | |
6db92468 | 3536 | unregister = true; |
0241b836 RP |
3537 | |
3538 | err = rtnl_configure_link(dev, NULL); | |
6db92468 | 3539 | if (err) |
0241b836 | 3540 | goto errout; |
c80498e3 | 3541 | |
0241b836 | 3542 | /* notify default fdb entry */ |
61f46fe8 PM |
3543 | if (f) { |
3544 | err = vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), | |
3545 | RTM_NEWNEIGH, true); | |
3546 | if (err) | |
3547 | goto errout; | |
3548 | } | |
0241b836 | 3549 | |
c80498e3 ND |
3550 | list_add(&vxlan->next, &vn->vxlan_list); |
3551 | return 0; | |
6db92468 | 3552 | |
0241b836 | 3553 | errout: |
6db92468 PM |
3554 | /* unregister_netdevice() destroys the default FDB entry with deletion |
3555 | * notification. But the addition notification was not sent yet, so | |
3556 | * destroy the entry by hand here. | |
3557 | */ | |
0241b836 | 3558 | if (f) |
0e6160f3 | 3559 | vxlan_fdb_destroy(vxlan, f, false, false); |
6db92468 PM |
3560 | if (unregister) |
3561 | unregister_netdevice(dev); | |
0241b836 | 3562 | return err; |
c80498e3 ND |
3563 | } |
3564 | ||
8bcdc4f3 RP |
3565 | static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[], |
3566 | struct net_device *dev, struct vxlan_config *conf, | |
3567 | bool changelink) | |
0dfbdf41 | 3568 | { |
8bcdc4f3 | 3569 | struct vxlan_dev *vxlan = netdev_priv(dev); |
0dfbdf41 | 3570 | |
8bcdc4f3 | 3571 | memset(conf, 0, sizeof(*conf)); |
e277de5f | 3572 | |
8bcdc4f3 RP |
3573 | /* if changelink operation, start with old existing cfg */ |
3574 | if (changelink) | |
3575 | memcpy(conf, &vxlan->cfg, sizeof(*conf)); | |
3576 | ||
3577 | if (data[IFLA_VXLAN_ID]) { | |
3578 | __be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); | |
3579 | ||
3580 | if (changelink && (vni != conf->vni)) | |
3581 | return -EOPNOTSUPP; | |
3582 | conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); | |
3583 | } | |
0dfbdf41 TG |
3584 | |
3585 | if (data[IFLA_VXLAN_GROUP]) { | |
ce44a4ae MS |
3586 | if (changelink && (conf->remote_ip.sa.sa_family != AF_INET)) |
3587 | return -EOPNOTSUPP; | |
3588 | ||
8bcdc4f3 | 3589 | conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); |
ce44a4ae | 3590 | conf->remote_ip.sa.sa_family = AF_INET; |
0dfbdf41 TG |
3591 | } else if (data[IFLA_VXLAN_GROUP6]) { |
3592 | if (!IS_ENABLED(CONFIG_IPV6)) | |
3593 | return -EPFNOSUPPORT; | |
3594 | ||
ce44a4ae MS |
3595 | if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6)) |
3596 | return -EOPNOTSUPP; | |
3597 | ||
8bcdc4f3 RP |
3598 | conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); |
3599 | conf->remote_ip.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
3600 | } |
3601 | ||
3602 | if (data[IFLA_VXLAN_LOCAL]) { | |
ce44a4ae MS |
3603 | if (changelink && (conf->saddr.sa.sa_family != AF_INET)) |
3604 | return -EOPNOTSUPP; | |
3605 | ||
8bcdc4f3 RP |
3606 | conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); |
3607 | conf->saddr.sa.sa_family = AF_INET; | |
0dfbdf41 TG |
3608 | } else if (data[IFLA_VXLAN_LOCAL6]) { |
3609 | if (!IS_ENABLED(CONFIG_IPV6)) | |
3610 | return -EPFNOSUPPORT; | |
3611 | ||
ce44a4ae MS |
3612 | if (changelink && (conf->saddr.sa.sa_family != AF_INET6)) |
3613 | return -EOPNOTSUPP; | |
3614 | ||
0dfbdf41 | 3615 | /* TODO: respect scope id */ |
8bcdc4f3 RP |
3616 | conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); |
3617 | conf->saddr.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
3618 | } |
3619 | ||
3620 | if (data[IFLA_VXLAN_LINK]) | |
8bcdc4f3 | 3621 | conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); |
0dfbdf41 | 3622 | |
d342894c | 3623 | if (data[IFLA_VXLAN_TOS]) |
8bcdc4f3 | 3624 | conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 3625 | |
afb97186 | 3626 | if (data[IFLA_VXLAN_TTL]) |
8bcdc4f3 | 3627 | conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 3628 | |
72f6d71e HL |
3629 | if (data[IFLA_VXLAN_TTL_INHERIT]) { |
3630 | if (changelink) | |
3631 | return -EOPNOTSUPP; | |
3632 | conf->flags |= VXLAN_F_TTL_INHERIT; | |
3633 | } | |
3634 | ||
e7f70af1 | 3635 | if (data[IFLA_VXLAN_LABEL]) |
8bcdc4f3 | 3636 | conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) & |
e7f70af1 DB |
3637 | IPV6_FLOWLABEL_MASK; |
3638 | ||
8bcdc4f3 | 3639 | if (data[IFLA_VXLAN_LEARNING]) { |
dc5321d7 | 3640 | if (nla_get_u8(data[IFLA_VXLAN_LEARNING])) |
8bcdc4f3 | 3641 | conf->flags |= VXLAN_F_LEARN; |
dc5321d7 | 3642 | else |
8bcdc4f3 | 3643 | conf->flags &= ~VXLAN_F_LEARN; |
8bcdc4f3 RP |
3644 | } else if (!changelink) { |
3645 | /* default to learn on a new device */ | |
3646 | conf->flags |= VXLAN_F_LEARN; | |
3647 | } | |
d342894c | 3648 | |
40051c4d | 3649 | if (data[IFLA_VXLAN_AGEING]) |
8bcdc4f3 | 3650 | conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); |
d342894c | 3651 | |
8bcdc4f3 RP |
3652 | if (data[IFLA_VXLAN_PROXY]) { |
3653 | if (changelink) | |
3654 | return -EOPNOTSUPP; | |
3655 | if (nla_get_u8(data[IFLA_VXLAN_PROXY])) | |
3656 | conf->flags |= VXLAN_F_PROXY; | |
3657 | } | |
e4f67add | 3658 | |
8bcdc4f3 RP |
3659 | if (data[IFLA_VXLAN_RSC]) { |
3660 | if (changelink) | |
3661 | return -EOPNOTSUPP; | |
3662 | if (nla_get_u8(data[IFLA_VXLAN_RSC])) | |
3663 | conf->flags |= VXLAN_F_RSC; | |
3664 | } | |
e4f67add | 3665 | |
8bcdc4f3 RP |
3666 | if (data[IFLA_VXLAN_L2MISS]) { |
3667 | if (changelink) | |
3668 | return -EOPNOTSUPP; | |
3669 | if (nla_get_u8(data[IFLA_VXLAN_L2MISS])) | |
3670 | conf->flags |= VXLAN_F_L2MISS; | |
3671 | } | |
e4f67add | 3672 | |
8bcdc4f3 RP |
3673 | if (data[IFLA_VXLAN_L3MISS]) { |
3674 | if (changelink) | |
3675 | return -EOPNOTSUPP; | |
3676 | if (nla_get_u8(data[IFLA_VXLAN_L3MISS])) | |
3677 | conf->flags |= VXLAN_F_L3MISS; | |
3678 | } | |
e4f67add | 3679 | |
8bcdc4f3 RP |
3680 | if (data[IFLA_VXLAN_LIMIT]) { |
3681 | if (changelink) | |
3682 | return -EOPNOTSUPP; | |
3683 | conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); | |
3684 | } | |
d342894c | 3685 | |
8bcdc4f3 RP |
3686 | if (data[IFLA_VXLAN_COLLECT_METADATA]) { |
3687 | if (changelink) | |
3688 | return -EOPNOTSUPP; | |
3689 | if (nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA])) | |
3690 | conf->flags |= VXLAN_F_COLLECT_METADATA; | |
3691 | } | |
f8a9b1bc | 3692 | |
05f47d69 | 3693 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
8bcdc4f3 RP |
3694 | if (!changelink) { |
3695 | const struct ifla_vxlan_port_range *p | |
3696 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
3697 | conf->port_min = ntohs(p->low); | |
3698 | conf->port_max = ntohs(p->high); | |
3699 | } else { | |
3700 | return -EOPNOTSUPP; | |
3701 | } | |
05f47d69 | 3702 | } |
3703 | ||
8bcdc4f3 RP |
3704 | if (data[IFLA_VXLAN_PORT]) { |
3705 | if (changelink) | |
3706 | return -EOPNOTSUPP; | |
3707 | conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); | |
3708 | } | |
823aa873 | 3709 | |
8bcdc4f3 RP |
3710 | if (data[IFLA_VXLAN_UDP_CSUM]) { |
3711 | if (changelink) | |
3712 | return -EOPNOTSUPP; | |
3713 | if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) | |
3714 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX; | |
3715 | } | |
359a0ea9 | 3716 | |
8bcdc4f3 RP |
3717 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) { |
3718 | if (changelink) | |
3719 | return -EOPNOTSUPP; | |
3720 | if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) | |
3721 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_TX; | |
3722 | } | |
359a0ea9 | 3723 | |
8bcdc4f3 RP |
3724 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) { |
3725 | if (changelink) | |
3726 | return -EOPNOTSUPP; | |
3727 | if (nla_get_u8(data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) | |
3728 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM6_RX; | |
3729 | } | |
359a0ea9 | 3730 | |
8bcdc4f3 RP |
3731 | if (data[IFLA_VXLAN_REMCSUM_TX]) { |
3732 | if (changelink) | |
3733 | return -EOPNOTSUPP; | |
3734 | if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_TX])) | |
3735 | conf->flags |= VXLAN_F_REMCSUM_TX; | |
3736 | } | |
dfd8645e | 3737 | |
8bcdc4f3 RP |
3738 | if (data[IFLA_VXLAN_REMCSUM_RX]) { |
3739 | if (changelink) | |
3740 | return -EOPNOTSUPP; | |
3741 | if (nla_get_u8(data[IFLA_VXLAN_REMCSUM_RX])) | |
3742 | conf->flags |= VXLAN_F_REMCSUM_RX; | |
3743 | } | |
3744 | ||
3745 | if (data[IFLA_VXLAN_GBP]) { | |
3746 | if (changelink) | |
3747 | return -EOPNOTSUPP; | |
3748 | conf->flags |= VXLAN_F_GBP; | |
3749 | } | |
3750 | ||
3751 | if (data[IFLA_VXLAN_GPE]) { | |
3752 | if (changelink) | |
3753 | return -EOPNOTSUPP; | |
3754 | conf->flags |= VXLAN_F_GPE; | |
3755 | } | |
3756 | ||
3757 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) { | |
3758 | if (changelink) | |
3759 | return -EOPNOTSUPP; | |
3760 | conf->flags |= VXLAN_F_REMCSUM_NOPARTIAL; | |
3761 | } | |
3762 | ||
3763 | if (tb[IFLA_MTU]) { | |
3764 | if (changelink) | |
3765 | return -EOPNOTSUPP; | |
3766 | conf->mtu = nla_get_u32(tb[IFLA_MTU]); | |
3767 | } | |
3768 | ||
b4d30697 SB |
3769 | if (data[IFLA_VXLAN_DF]) |
3770 | conf->df = nla_get_u8(data[IFLA_VXLAN_DF]); | |
3771 | ||
8bcdc4f3 RP |
3772 | return 0; |
3773 | } | |
3774 | ||
3775 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
7a3f4a18 MS |
3776 | struct nlattr *tb[], struct nlattr *data[], |
3777 | struct netlink_ext_ack *extack) | |
8bcdc4f3 | 3778 | { |
8bcdc4f3 RP |
3779 | struct vxlan_config conf; |
3780 | int err; | |
3781 | ||
3782 | err = vxlan_nl2conf(tb, data, dev, &conf, false); | |
3783 | if (err) | |
3784 | return err; | |
3785 | ||
653ef6a3 | 3786 | return __vxlan_dev_create(src_net, dev, &conf, extack); |
8bcdc4f3 | 3787 | } |
dfd8645e | 3788 | |
8bcdc4f3 | 3789 | static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[], |
ad744b22 MS |
3790 | struct nlattr *data[], |
3791 | struct netlink_ext_ack *extack) | |
8bcdc4f3 RP |
3792 | { |
3793 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3794 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
40051c4d | 3795 | unsigned long old_age_interval; |
8db9427d | 3796 | struct net_device *lowerdev; |
8bcdc4f3 RP |
3797 | struct vxlan_rdst old_dst; |
3798 | struct vxlan_config conf; | |
3799 | int err; | |
3800 | ||
3801 | err = vxlan_nl2conf(tb, data, | |
3802 | dev, &conf, true); | |
3803 | if (err) | |
3804 | return err; | |
3511494c | 3805 | |
40051c4d | 3806 | old_age_interval = vxlan->cfg.age_interval; |
8bcdc4f3 | 3807 | memcpy(&old_dst, dst, sizeof(struct vxlan_rdst)); |
e1e5314d | 3808 | |
8db9427d PM |
3809 | err = vxlan_config_validate(vxlan->net, &conf, &lowerdev, |
3810 | vxlan, extack); | |
8bcdc4f3 RP |
3811 | if (err) |
3812 | return err; | |
0ace2ca8 | 3813 | |
8db9427d PM |
3814 | vxlan_config_apply(dev, &conf, lowerdev, vxlan->net, true); |
3815 | ||
40051c4d IS |
3816 | if (old_age_interval != vxlan->cfg.age_interval) |
3817 | mod_timer(&vxlan->age_timer, jiffies); | |
3818 | ||
8bcdc4f3 RP |
3819 | /* handle default dst entry */ |
3820 | if (!vxlan_addr_equal(&dst->remote_ip, &old_dst.remote_ip)) { | |
3821 | spin_lock_bh(&vxlan->hash_lock); | |
3822 | if (!vxlan_addr_any(&old_dst.remote_ip)) | |
3823 | __vxlan_fdb_delete(vxlan, all_zeros_mac, | |
3824 | old_dst.remote_ip, | |
3825 | vxlan->cfg.dst_port, | |
3826 | old_dst.remote_vni, | |
3827 | old_dst.remote_vni, | |
0e6160f3 PM |
3828 | old_dst.remote_ifindex, |
3829 | true); | |
8bcdc4f3 RP |
3830 | |
3831 | if (!vxlan_addr_any(&dst->remote_ip)) { | |
ce5e098f | 3832 | err = vxlan_fdb_update(vxlan, all_zeros_mac, |
8bcdc4f3 RP |
3833 | &dst->remote_ip, |
3834 | NUD_REACHABLE | NUD_PERMANENT, | |
ce5e098f | 3835 | NLM_F_APPEND | NLM_F_CREATE, |
8bcdc4f3 RP |
3836 | vxlan->cfg.dst_port, |
3837 | dst->remote_vni, | |
3838 | dst->remote_vni, | |
3839 | dst->remote_ifindex, | |
3a6d528a | 3840 | NTF_SELF, true); |
8bcdc4f3 RP |
3841 | if (err) { |
3842 | spin_unlock_bh(&vxlan->hash_lock); | |
3843 | return err; | |
3844 | } | |
3845 | } | |
3846 | spin_unlock_bh(&vxlan->hash_lock); | |
3847 | } | |
ce577668 | 3848 | |
8bcdc4f3 | 3849 | return 0; |
d342894c | 3850 | } |
3851 | ||
3852 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
3853 | { | |
3854 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3855 | ||
8b3f9337 RP |
3856 | vxlan_flush(vxlan, true); |
3857 | ||
58ce31cc | 3858 | gro_cells_destroy(&vxlan->gro_cells); |
553675fb | 3859 | list_del(&vxlan->next); |
d342894c | 3860 | unregister_netdevice_queue(dev, head); |
3861 | } | |
3862 | ||
3863 | static size_t vxlan_get_size(const struct net_device *dev) | |
3864 | { | |
3865 | ||
3866 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 3867 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 3868 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 3869 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 3870 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
8fd78069 | 3871 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL_INHERIT */ |
d342894c | 3872 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ |
b4d30697 | 3873 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_DF */ |
e7f70af1 | 3874 | nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */ |
d342894c | 3875 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ |
e4f67add DS |
3876 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
3877 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
3878 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
3879 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
da8b43c0 | 3880 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
d342894c | 3881 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
3882 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 3883 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
3884 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
3885 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
3886 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
3887 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
3888 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
3889 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 3890 | 0; |
3891 | } | |
3892 | ||
3893 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
3894 | { | |
3895 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 3896 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 3897 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
3898 | .low = htons(vxlan->cfg.port_min), |
3899 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 3900 | }; |
d342894c | 3901 | |
54bfd872 | 3902 | if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni))) |
d342894c | 3903 | goto nla_put_failure; |
3904 | ||
e4c7ed41 CW |
3905 | if (!vxlan_addr_any(&dst->remote_ip)) { |
3906 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
3907 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
3908 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
3909 | goto nla_put_failure; |
3910 | #if IS_ENABLED(CONFIG_IPV6) | |
3911 | } else { | |
930345ea JB |
3912 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
3913 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
3914 | goto nla_put_failure; |
3915 | #endif | |
3916 | } | |
3917 | } | |
d342894c | 3918 | |
c7995c43 | 3919 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 3920 | goto nla_put_failure; |
3921 | ||
0dfbdf41 TG |
3922 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
3923 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 3924 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 3925 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
3926 | goto nla_put_failure; |
3927 | #if IS_ENABLED(CONFIG_IPV6) | |
3928 | } else { | |
930345ea | 3929 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 3930 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
3931 | goto nla_put_failure; |
3932 | #endif | |
3933 | } | |
3934 | } | |
d342894c | 3935 | |
0dfbdf41 | 3936 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
8fd78069 HL |
3937 | nla_put_u8(skb, IFLA_VXLAN_TTL_INHERIT, |
3938 | !!(vxlan->cfg.flags & VXLAN_F_TTL_INHERIT)) || | |
0dfbdf41 | 3939 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || |
b4d30697 | 3940 | nla_put_u8(skb, IFLA_VXLAN_DF, vxlan->cfg.df) || |
e7f70af1 | 3941 | nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) || |
e4f67add | 3942 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
dc5321d7 | 3943 | !!(vxlan->cfg.flags & VXLAN_F_LEARN)) || |
e4f67add | 3944 | nla_put_u8(skb, IFLA_VXLAN_PROXY, |
dc5321d7 MS |
3945 | !!(vxlan->cfg.flags & VXLAN_F_PROXY)) || |
3946 | nla_put_u8(skb, IFLA_VXLAN_RSC, | |
3947 | !!(vxlan->cfg.flags & VXLAN_F_RSC)) || | |
e4f67add | 3948 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, |
dc5321d7 | 3949 | !!(vxlan->cfg.flags & VXLAN_F_L2MISS)) || |
e4f67add | 3950 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, |
dc5321d7 | 3951 | !!(vxlan->cfg.flags & VXLAN_F_L3MISS)) || |
da8b43c0 | 3952 | nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
dc5321d7 | 3953 | !!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)) || |
0dfbdf41 TG |
3954 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
3955 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
3956 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 | 3957 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
dc5321d7 | 3958 | !(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM_TX)) || |
359a0ea9 | 3959 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
dc5321d7 | 3960 | !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || |
359a0ea9 | 3961 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, |
dc5321d7 | 3962 | !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
dfd8645e | 3963 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, |
dc5321d7 | 3964 | !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_TX)) || |
dfd8645e | 3965 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, |
dc5321d7 | 3966 | !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_RX))) |
d342894c | 3967 | goto nla_put_failure; |
3968 | ||
05f47d69 | 3969 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
3970 | goto nla_put_failure; | |
3971 | ||
dc5321d7 | 3972 | if (vxlan->cfg.flags & VXLAN_F_GBP && |
3511494c TG |
3973 | nla_put_flag(skb, IFLA_VXLAN_GBP)) |
3974 | goto nla_put_failure; | |
3975 | ||
dc5321d7 | 3976 | if (vxlan->cfg.flags & VXLAN_F_GPE && |
e1e5314d JB |
3977 | nla_put_flag(skb, IFLA_VXLAN_GPE)) |
3978 | goto nla_put_failure; | |
3979 | ||
dc5321d7 | 3980 | if (vxlan->cfg.flags & VXLAN_F_REMCSUM_NOPARTIAL && |
0ace2ca8 TH |
3981 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) |
3982 | goto nla_put_failure; | |
3983 | ||
d342894c | 3984 | return 0; |
3985 | ||
3986 | nla_put_failure: | |
3987 | return -EMSGSIZE; | |
3988 | } | |
3989 | ||
1728d4fa ND |
3990 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
3991 | { | |
3992 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3993 | ||
3994 | return vxlan->net; | |
3995 | } | |
3996 | ||
d342894c | 3997 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
3998 | .kind = "vxlan", | |
3999 | .maxtype = IFLA_VXLAN_MAX, | |
4000 | .policy = vxlan_policy, | |
4001 | .priv_size = sizeof(struct vxlan_dev), | |
4002 | .setup = vxlan_setup, | |
4003 | .validate = vxlan_validate, | |
4004 | .newlink = vxlan_newlink, | |
8bcdc4f3 | 4005 | .changelink = vxlan_changelink, |
d342894c | 4006 | .dellink = vxlan_dellink, |
4007 | .get_size = vxlan_get_size, | |
4008 | .fill_info = vxlan_fill_info, | |
1728d4fa | 4009 | .get_link_net = vxlan_get_link_net, |
d342894c | 4010 | }; |
4011 | ||
cf5da330 ND |
4012 | struct net_device *vxlan_dev_create(struct net *net, const char *name, |
4013 | u8 name_assign_type, | |
4014 | struct vxlan_config *conf) | |
4015 | { | |
4016 | struct nlattr *tb[IFLA_MAX + 1]; | |
4017 | struct net_device *dev; | |
4018 | int err; | |
4019 | ||
4020 | memset(&tb, 0, sizeof(tb)); | |
4021 | ||
4022 | dev = rtnl_create_link(net, name, name_assign_type, | |
d0522f1c | 4023 | &vxlan_link_ops, tb, NULL); |
cf5da330 ND |
4024 | if (IS_ERR(dev)) |
4025 | return dev; | |
4026 | ||
653ef6a3 | 4027 | err = __vxlan_dev_create(net, dev, conf, NULL); |
cf5da330 ND |
4028 | if (err < 0) { |
4029 | free_netdev(dev); | |
4030 | return ERR_PTR(err); | |
4031 | } | |
4032 | ||
4033 | err = rtnl_configure_link(dev, NULL); | |
4034 | if (err < 0) { | |
4035 | LIST_HEAD(list_kill); | |
4036 | ||
4037 | vxlan_dellink(dev, &list_kill); | |
4038 | unregister_netdevice_many(&list_kill); | |
4039 | return ERR_PTR(err); | |
4040 | } | |
4041 | ||
4042 | return dev; | |
4043 | } | |
4044 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
4045 | ||
acaf4e70 DB |
4046 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
4047 | struct net_device *dev) | |
4048 | { | |
4049 | struct vxlan_dev *vxlan, *next; | |
4050 | LIST_HEAD(list_kill); | |
4051 | ||
4052 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
4053 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
4054 | ||
4055 | /* In case we created vxlan device with carrier | |
4056 | * and we loose the carrier due to module unload | |
4057 | * we also need to remove vxlan device. In other | |
4058 | * cases, it's not necessary and remote_ifindex | |
4059 | * is 0 here, so no matches. | |
4060 | */ | |
4061 | if (dst->remote_ifindex == dev->ifindex) | |
4062 | vxlan_dellink(vxlan->dev, &list_kill); | |
4063 | } | |
4064 | ||
4065 | unregister_netdevice_many(&list_kill); | |
4066 | } | |
4067 | ||
b7aade15 HFS |
4068 | static int vxlan_netdevice_event(struct notifier_block *unused, |
4069 | unsigned long event, void *ptr) | |
acaf4e70 DB |
4070 | { |
4071 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 4072 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 4073 | |
04584957 SD |
4074 | if (event == NETDEV_UNREGISTER) { |
4075 | vxlan_offload_rx_ports(dev, false); | |
acaf4e70 | 4076 | vxlan_handle_lowerdev_unregister(vn, dev); |
04584957 SD |
4077 | } else if (event == NETDEV_REGISTER) { |
4078 | vxlan_offload_rx_ports(dev, true); | |
4079 | } else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO || | |
4080 | event == NETDEV_UDP_TUNNEL_DROP_INFO) { | |
2d2b13fc | 4081 | vxlan_offload_rx_ports(dev, event == NETDEV_UDP_TUNNEL_PUSH_INFO); |
04584957 | 4082 | } |
acaf4e70 DB |
4083 | |
4084 | return NOTIFY_DONE; | |
4085 | } | |
4086 | ||
4087 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
b7aade15 | 4088 | .notifier_call = vxlan_netdevice_event, |
acaf4e70 DB |
4089 | }; |
4090 | ||
0efe1173 PM |
4091 | static void |
4092 | vxlan_fdb_offloaded_set(struct net_device *dev, | |
4093 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
4094 | { | |
4095 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4096 | struct vxlan_rdst *rdst; | |
4097 | struct vxlan_fdb *f; | |
4098 | ||
4099 | spin_lock_bh(&vxlan->hash_lock); | |
4100 | ||
4101 | f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni); | |
4102 | if (!f) | |
4103 | goto out; | |
4104 | ||
4105 | rdst = vxlan_fdb_find_rdst(f, &fdb_info->remote_ip, | |
4106 | fdb_info->remote_port, | |
4107 | fdb_info->remote_vni, | |
4108 | fdb_info->remote_ifindex); | |
4109 | if (!rdst) | |
4110 | goto out; | |
4111 | ||
4112 | rdst->offloaded = fdb_info->offloaded; | |
4113 | ||
4114 | out: | |
4115 | spin_unlock_bh(&vxlan->hash_lock); | |
4116 | } | |
4117 | ||
5728ae0d PM |
4118 | static int |
4119 | vxlan_fdb_external_learn_add(struct net_device *dev, | |
4120 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
4121 | { | |
4122 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4123 | int err; | |
4124 | ||
4125 | spin_lock_bh(&vxlan->hash_lock); | |
4126 | err = vxlan_fdb_update(vxlan, fdb_info->eth_addr, &fdb_info->remote_ip, | |
4127 | NUD_REACHABLE, | |
4128 | NLM_F_CREATE | NLM_F_REPLACE, | |
4129 | fdb_info->remote_port, | |
4130 | fdb_info->vni, | |
4131 | fdb_info->remote_vni, | |
4132 | fdb_info->remote_ifindex, | |
4133 | NTF_USE | NTF_SELF | NTF_EXT_LEARNED, | |
4134 | false); | |
4135 | spin_unlock_bh(&vxlan->hash_lock); | |
4136 | ||
4137 | return err; | |
4138 | } | |
4139 | ||
4140 | static int | |
4141 | vxlan_fdb_external_learn_del(struct net_device *dev, | |
4142 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
4143 | { | |
4144 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4145 | struct vxlan_fdb *f; | |
4146 | int err = 0; | |
4147 | ||
4148 | spin_lock_bh(&vxlan->hash_lock); | |
4149 | ||
4150 | f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni); | |
4151 | if (!f) | |
4152 | err = -ENOENT; | |
4153 | else if (f->flags & NTF_EXT_LEARNED) | |
4154 | err = __vxlan_fdb_delete(vxlan, fdb_info->eth_addr, | |
4155 | fdb_info->remote_ip, | |
4156 | fdb_info->remote_port, | |
4157 | fdb_info->vni, | |
4158 | fdb_info->remote_vni, | |
4159 | fdb_info->remote_ifindex, | |
4160 | false); | |
4161 | ||
4162 | spin_unlock_bh(&vxlan->hash_lock); | |
4163 | ||
4164 | return err; | |
4165 | } | |
4166 | ||
0efe1173 PM |
4167 | static int vxlan_switchdev_event(struct notifier_block *unused, |
4168 | unsigned long event, void *ptr) | |
4169 | { | |
4170 | struct net_device *dev = switchdev_notifier_info_to_dev(ptr); | |
5728ae0d PM |
4171 | struct switchdev_notifier_vxlan_fdb_info *fdb_info; |
4172 | int err = 0; | |
0efe1173 PM |
4173 | |
4174 | switch (event) { | |
4175 | case SWITCHDEV_VXLAN_FDB_OFFLOADED: | |
4176 | vxlan_fdb_offloaded_set(dev, ptr); | |
4177 | break; | |
5728ae0d PM |
4178 | case SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE: |
4179 | fdb_info = ptr; | |
4180 | err = vxlan_fdb_external_learn_add(dev, fdb_info); | |
4181 | if (err) { | |
4182 | err = notifier_from_errno(err); | |
4183 | break; | |
4184 | } | |
4185 | fdb_info->offloaded = true; | |
4186 | vxlan_fdb_offloaded_set(dev, fdb_info); | |
4187 | break; | |
4188 | case SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE: | |
4189 | fdb_info = ptr; | |
4190 | err = vxlan_fdb_external_learn_del(dev, fdb_info); | |
4191 | if (err) { | |
4192 | err = notifier_from_errno(err); | |
4193 | break; | |
4194 | } | |
4195 | fdb_info->offloaded = false; | |
4196 | vxlan_fdb_offloaded_set(dev, fdb_info); | |
4197 | break; | |
0efe1173 PM |
4198 | } |
4199 | ||
5728ae0d | 4200 | return err; |
0efe1173 PM |
4201 | } |
4202 | ||
4203 | static struct notifier_block vxlan_switchdev_notifier_block __read_mostly = { | |
4204 | .notifier_call = vxlan_switchdev_event, | |
4205 | }; | |
4206 | ||
d342894c | 4207 | static __net_init int vxlan_init_net(struct net *net) |
4208 | { | |
4209 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 4210 | unsigned int h; |
d342894c | 4211 | |
553675fb | 4212 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 4213 | spin_lock_init(&vn->sock_lock); |
d342894c | 4214 | |
553675fb | 4215 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
4216 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 4217 | |
4218 | return 0; | |
4219 | } | |
4220 | ||
57b61127 | 4221 | static void vxlan_destroy_tunnels(struct net *net, struct list_head *head) |
f01ec1c0 ND |
4222 | { |
4223 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
4224 | struct vxlan_dev *vxlan, *next; | |
4225 | struct net_device *dev, *aux; | |
0e4ec5ac | 4226 | unsigned int h; |
f01ec1c0 | 4227 | |
f01ec1c0 ND |
4228 | for_each_netdev_safe(net, dev, aux) |
4229 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
57b61127 | 4230 | unregister_netdevice_queue(dev, head); |
f01ec1c0 ND |
4231 | |
4232 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
4233 | /* If vxlan->dev is in the same netns, it has already been added | |
4234 | * to the list by the previous loop. | |
4235 | */ | |
58ce31cc TH |
4236 | if (!net_eq(dev_net(vxlan->dev), net)) { |
4237 | gro_cells_destroy(&vxlan->gro_cells); | |
57b61127 | 4238 | unregister_netdevice_queue(vxlan->dev, head); |
58ce31cc | 4239 | } |
f01ec1c0 ND |
4240 | } |
4241 | ||
0e4ec5ac VA |
4242 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
4243 | WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h])); | |
f01ec1c0 ND |
4244 | } |
4245 | ||
57b61127 HY |
4246 | static void __net_exit vxlan_exit_batch_net(struct list_head *net_list) |
4247 | { | |
4248 | struct net *net; | |
4249 | LIST_HEAD(list); | |
4250 | ||
4251 | rtnl_lock(); | |
4252 | list_for_each_entry(net, net_list, exit_list) | |
4253 | vxlan_destroy_tunnels(net, &list); | |
4254 | ||
4255 | unregister_netdevice_many(&list); | |
4256 | rtnl_unlock(); | |
4257 | } | |
4258 | ||
d342894c | 4259 | static struct pernet_operations vxlan_net_ops = { |
4260 | .init = vxlan_init_net, | |
57b61127 | 4261 | .exit_batch = vxlan_exit_batch_net, |
d342894c | 4262 | .id = &vxlan_net_id, |
4263 | .size = sizeof(struct vxlan_net), | |
4264 | }; | |
4265 | ||
4266 | static int __init vxlan_init_module(void) | |
4267 | { | |
4268 | int rc; | |
4269 | ||
4270 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); | |
4271 | ||
783c1463 | 4272 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 4273 | if (rc) |
4274 | goto out1; | |
4275 | ||
acaf4e70 | 4276 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 4277 | if (rc) |
4278 | goto out2; | |
4279 | ||
0efe1173 | 4280 | rc = register_switchdev_notifier(&vxlan_switchdev_notifier_block); |
acaf4e70 DB |
4281 | if (rc) |
4282 | goto out3; | |
d342894c | 4283 | |
0efe1173 PM |
4284 | rc = rtnl_link_register(&vxlan_link_ops); |
4285 | if (rc) | |
4286 | goto out4; | |
4287 | ||
acaf4e70 | 4288 | return 0; |
0efe1173 PM |
4289 | out4: |
4290 | unregister_switchdev_notifier(&vxlan_switchdev_notifier_block); | |
acaf4e70 DB |
4291 | out3: |
4292 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 4293 | out2: |
783c1463 | 4294 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 4295 | out1: |
4296 | return rc; | |
4297 | } | |
7332a13b | 4298 | late_initcall(vxlan_init_module); |
d342894c | 4299 | |
4300 | static void __exit vxlan_cleanup_module(void) | |
4301 | { | |
b7153984 | 4302 | rtnl_link_unregister(&vxlan_link_ops); |
0efe1173 | 4303 | unregister_switchdev_notifier(&vxlan_switchdev_notifier_block); |
acaf4e70 | 4304 | unregister_netdevice_notifier(&vxlan_notifier_block); |
783c1463 DB |
4305 | unregister_pernet_subsys(&vxlan_net_ops); |
4306 | /* rcu_barrier() is called by netns */ | |
d342894c | 4307 | } |
4308 | module_exit(vxlan_cleanup_module); | |
4309 | ||
4310 | MODULE_LICENSE("GPL"); | |
4311 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 4312 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 4313 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 4314 | MODULE_ALIAS_RTNL_LINK("vxlan"); |