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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
d342894c | 2 | /* |
eb5ce439 | 3 | * VXLAN: Virtual eXtensible Local Area Network |
d342894c | 4 | * |
3b8df3c6 | 5 | * Copyright (c) 2012-2013 Vyatta Inc. |
d342894c | 6 | */ |
7 | ||
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
9 | ||
10 | #include <linux/kernel.h> | |
d342894c | 11 | #include <linux/module.h> |
12 | #include <linux/errno.h> | |
13 | #include <linux/slab.h> | |
d342894c | 14 | #include <linux/udp.h> |
15 | #include <linux/igmp.h> | |
d342894c | 16 | #include <linux/if_ether.h> |
1b13c97f | 17 | #include <linux/ethtool.h> |
e4f67add DS |
18 | #include <net/arp.h> |
19 | #include <net/ndisc.h> | |
3616d08b | 20 | #include <net/ipv6_stubs.h> |
d342894c | 21 | #include <net/ip.h> |
22 | #include <net/icmp.h> | |
d342894c | 23 | #include <net/rtnetlink.h> |
d342894c | 24 | #include <net/inet_ecn.h> |
25 | #include <net/net_namespace.h> | |
26 | #include <net/netns/generic.h> | |
fa20e0e3 | 27 | #include <net/tun_proto.h> |
012a5729 | 28 | #include <net/vxlan.h> |
1274e1cc | 29 | #include <net/nexthop.h> |
40d29af0 | 30 | |
e4c7ed41 | 31 | #if IS_ENABLED(CONFIG_IPV6) |
e4c7ed41 | 32 | #include <net/ip6_tunnel.h> |
660d98ca | 33 | #include <net/ip6_checksum.h> |
e4c7ed41 | 34 | #endif |
d342894c | 35 | |
36 | #define VXLAN_VERSION "0.1" | |
37 | ||
553675fb | 38 | #define PORT_HASH_BITS 8 |
39 | #define PORT_HASH_SIZE (1<<PORT_HASH_BITS) | |
d342894c | 40 | #define FDB_AGE_DEFAULT 300 /* 5 min */ |
41 | #define FDB_AGE_INTERVAL (10 * HZ) /* rescan interval */ | |
42 | ||
23c578bf | 43 | /* UDP port for VXLAN traffic. |
44 | * The IANA assigned port is 4789, but the Linux default is 8472 | |
234f5b73 | 45 | * for compatibility with early adopters. |
23c578bf | 46 | */ |
9daaa397 SH |
47 | static unsigned short vxlan_port __read_mostly = 8472; |
48 | module_param_named(udp_port, vxlan_port, ushort, 0444); | |
d342894c | 49 | MODULE_PARM_DESC(udp_port, "Destination UDP port"); |
50 | ||
51 | static bool log_ecn_error = true; | |
52 | module_param(log_ecn_error, bool, 0644); | |
53 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
54 | ||
c7d03a00 | 55 | static unsigned int vxlan_net_id; |
0dfbdf41 | 56 | static struct rtnl_link_ops vxlan_link_ops; |
553675fb | 57 | |
7256eac1 | 58 | static const u8 all_zeros_mac[ETH_ALEN + 2]; |
afbd8bae | 59 | |
205f356d | 60 | static int vxlan_sock_add(struct vxlan_dev *vxlan); |
614732ea | 61 | |
a53cb29b MB |
62 | static void vxlan_vs_del_dev(struct vxlan_dev *vxlan); |
63 | ||
553675fb | 64 | /* per-network namespace private data for this module */ |
65 | struct vxlan_net { | |
66 | struct list_head vxlan_list; | |
67 | struct hlist_head sock_list[PORT_HASH_SIZE]; | |
1c51a915 | 68 | spinlock_t sock_lock; |
553675fb | 69 | }; |
70 | ||
d342894c | 71 | /* Forwarding table entry */ |
72 | struct vxlan_fdb { | |
73 | struct hlist_node hlist; /* linked list of entries */ | |
74 | struct rcu_head rcu; | |
75 | unsigned long updated; /* jiffies */ | |
76 | unsigned long used; | |
3e61aa8f | 77 | struct list_head remotes; |
7177a3b0 | 78 | u8 eth_addr[ETH_ALEN]; |
d342894c | 79 | u16 state; /* see ndm_state */ |
3ad7a4b1 | 80 | __be32 vni; |
45598c1c | 81 | u16 flags; /* see ndm_flags and below */ |
1274e1cc RP |
82 | struct list_head nh_list; |
83 | struct nexthop __rcu *nh; | |
79472fe8 | 84 | struct vxlan_dev __rcu *vdev; |
d342894c | 85 | }; |
86 | ||
45598c1c PM |
87 | #define NTF_VXLAN_ADDED_BY_USER 0x100 |
88 | ||
d342894c | 89 | /* salt for hash table */ |
90 | static u32 vxlan_salt __read_mostly; | |
91 | ||
ee122c79 TG |
92 | static inline bool vxlan_collect_metadata(struct vxlan_sock *vs) |
93 | { | |
e7030878 TG |
94 | return vs->flags & VXLAN_F_COLLECT_METADATA || |
95 | ip_tunnel_collect_metadata(); | |
ee122c79 TG |
96 | } |
97 | ||
e4c7ed41 CW |
98 | #if IS_ENABLED(CONFIG_IPV6) |
99 | static inline | |
100 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
101 | { | |
f0ef3126 JB |
102 | if (a->sa.sa_family != b->sa.sa_family) |
103 | return false; | |
104 | if (a->sa.sa_family == AF_INET6) | |
105 | return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); | |
106 | else | |
107 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; | |
e4c7ed41 CW |
108 | } |
109 | ||
e4c7ed41 CW |
110 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) |
111 | { | |
f0ef3126 | 112 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
67b61f6c | 113 | ip->sin6.sin6_addr = nla_get_in6_addr(nla); |
f0ef3126 JB |
114 | ip->sa.sa_family = AF_INET6; |
115 | return 0; | |
116 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 117 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
118 | ip->sa.sa_family = AF_INET; |
119 | return 0; | |
120 | } else { | |
121 | return -EAFNOSUPPORT; | |
122 | } | |
e4c7ed41 CW |
123 | } |
124 | ||
125 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 126 | const union vxlan_addr *ip) |
e4c7ed41 | 127 | { |
f0ef3126 | 128 | if (ip->sa.sa_family == AF_INET6) |
930345ea | 129 | return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); |
f0ef3126 | 130 | else |
930345ea | 131 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
132 | } |
133 | ||
134 | #else /* !CONFIG_IPV6 */ | |
135 | ||
136 | static inline | |
137 | bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) | |
138 | { | |
f0ef3126 | 139 | return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; |
e4c7ed41 CW |
140 | } |
141 | ||
e4c7ed41 CW |
142 | static int vxlan_nla_get_addr(union vxlan_addr *ip, struct nlattr *nla) |
143 | { | |
f0ef3126 JB |
144 | if (nla_len(nla) >= sizeof(struct in6_addr)) { |
145 | return -EAFNOSUPPORT; | |
146 | } else if (nla_len(nla) >= sizeof(__be32)) { | |
67b61f6c | 147 | ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); |
f0ef3126 JB |
148 | ip->sa.sa_family = AF_INET; |
149 | return 0; | |
150 | } else { | |
151 | return -EAFNOSUPPORT; | |
152 | } | |
e4c7ed41 CW |
153 | } |
154 | ||
155 | static int vxlan_nla_put_addr(struct sk_buff *skb, int attr, | |
f0ef3126 | 156 | const union vxlan_addr *ip) |
e4c7ed41 | 157 | { |
930345ea | 158 | return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); |
e4c7ed41 CW |
159 | } |
160 | #endif | |
161 | ||
553675fb | 162 | /* Virtual Network hash table head */ |
54bfd872 | 163 | static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni) |
553675fb | 164 | { |
54bfd872 | 165 | return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)]; |
553675fb | 166 | } |
167 | ||
168 | /* Socket hash table head */ | |
169 | static inline struct hlist_head *vs_head(struct net *net, __be16 port) | |
d342894c | 170 | { |
171 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
172 | ||
553675fb | 173 | return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; |
174 | } | |
175 | ||
3e61aa8f SH |
176 | /* First remote destination for a forwarding entry. |
177 | * Guaranteed to be non-NULL because remotes are never deleted. | |
178 | */ | |
5ca5461c | 179 | static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) |
3e61aa8f | 180 | { |
1274e1cc RP |
181 | if (rcu_access_pointer(fdb->nh)) |
182 | return NULL; | |
5ca5461c | 183 | return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); |
184 | } | |
185 | ||
186 | static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) | |
187 | { | |
1274e1cc RP |
188 | if (rcu_access_pointer(fdb->nh)) |
189 | return NULL; | |
5ca5461c | 190 | return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); |
3e61aa8f SH |
191 | } |
192 | ||
ac5132d1 TG |
193 | /* Find VXLAN socket based on network namespace, address family and UDP port |
194 | * and enabled unshareable flags. | |
195 | */ | |
196 | static struct vxlan_sock *vxlan_find_sock(struct net *net, sa_family_t family, | |
aab8cc36 | 197 | __be16 port, u32 flags, int ifindex) |
553675fb | 198 | { |
199 | struct vxlan_sock *vs; | |
af33c1ad TH |
200 | |
201 | flags &= VXLAN_F_RCV_FLAGS; | |
553675fb | 202 | |
203 | hlist_for_each_entry_rcu(vs, vs_head(net, port), hlist) { | |
19ca9fc1 | 204 | if (inet_sk(vs->sock->sk)->inet_sport == port && |
705cc62f | 205 | vxlan_get_sk_family(vs) == family && |
aab8cc36 AB |
206 | vs->flags == flags && |
207 | vs->sock->sk->sk_bound_dev_if == ifindex) | |
553675fb | 208 | return vs; |
209 | } | |
210 | return NULL; | |
d342894c | 211 | } |
212 | ||
49f810f0 MS |
213 | static struct vxlan_dev *vxlan_vs_find_vni(struct vxlan_sock *vs, int ifindex, |
214 | __be32 vni) | |
d342894c | 215 | { |
69e76661 | 216 | struct vxlan_dev_node *node; |
d342894c | 217 | |
b9167b2e JB |
218 | /* For flow based devices, map all packets to VNI 0 */ |
219 | if (vs->flags & VXLAN_F_COLLECT_METADATA) | |
220 | vni = 0; | |
221 | ||
69e76661 JB |
222 | hlist_for_each_entry_rcu(node, vni_head(vs, vni), hlist) { |
223 | if (node->vxlan->default_dst.remote_vni != vni) | |
49f810f0 MS |
224 | continue; |
225 | ||
226 | if (IS_ENABLED(CONFIG_IPV6)) { | |
69e76661 | 227 | const struct vxlan_config *cfg = &node->vxlan->cfg; |
49f810f0 MS |
228 | |
229 | if ((cfg->flags & VXLAN_F_IPV6_LINKLOCAL) && | |
230 | cfg->remote_ifindex != ifindex) | |
231 | continue; | |
232 | } | |
233 | ||
69e76661 | 234 | return node->vxlan; |
d342894c | 235 | } |
236 | ||
237 | return NULL; | |
238 | } | |
239 | ||
5cfccc5a | 240 | /* Look up VNI in a per net namespace table */ |
49f810f0 MS |
241 | static struct vxlan_dev *vxlan_find_vni(struct net *net, int ifindex, |
242 | __be32 vni, sa_family_t family, | |
243 | __be16 port, u32 flags) | |
5cfccc5a PS |
244 | { |
245 | struct vxlan_sock *vs; | |
246 | ||
aab8cc36 | 247 | vs = vxlan_find_sock(net, family, port, flags, ifindex); |
5cfccc5a PS |
248 | if (!vs) |
249 | return NULL; | |
250 | ||
49f810f0 | 251 | return vxlan_vs_find_vni(vs, ifindex, vni); |
5cfccc5a PS |
252 | } |
253 | ||
d342894c | 254 | /* Fill in neighbour message in skbuff. */ |
255 | static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan, | |
234f5b73 SH |
256 | const struct vxlan_fdb *fdb, |
257 | u32 portid, u32 seq, int type, unsigned int flags, | |
258 | const struct vxlan_rdst *rdst) | |
d342894c | 259 | { |
260 | unsigned long now = jiffies; | |
261 | struct nda_cacheinfo ci; | |
1274e1cc | 262 | bool send_ip, send_eth; |
d342894c | 263 | struct nlmsghdr *nlh; |
1274e1cc | 264 | struct nexthop *nh; |
d342894c | 265 | struct ndmsg *ndm; |
06ec313e IS |
266 | int nh_family; |
267 | u32 nh_id; | |
d342894c | 268 | |
269 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
270 | if (nlh == NULL) | |
271 | return -EMSGSIZE; | |
272 | ||
273 | ndm = nlmsg_data(nlh); | |
274 | memset(ndm, 0, sizeof(*ndm)); | |
e4f67add DS |
275 | |
276 | send_eth = send_ip = true; | |
277 | ||
06ec313e IS |
278 | rcu_read_lock(); |
279 | nh = rcu_dereference(fdb->nh); | |
280 | if (nh) { | |
281 | nh_family = nexthop_get_family(nh); | |
282 | nh_id = nh->id; | |
283 | } | |
284 | rcu_read_unlock(); | |
285 | ||
e4f67add | 286 | if (type == RTM_GETNEIGH) { |
1274e1cc RP |
287 | if (rdst) { |
288 | send_ip = !vxlan_addr_any(&rdst->remote_ip); | |
289 | ndm->ndm_family = send_ip ? rdst->remote_ip.sa.sa_family : AF_INET; | |
290 | } else if (nh) { | |
06ec313e | 291 | ndm->ndm_family = nh_family; |
1274e1cc | 292 | } |
e4f67add DS |
293 | send_eth = !is_zero_ether_addr(fdb->eth_addr); |
294 | } else | |
295 | ndm->ndm_family = AF_BRIDGE; | |
d342894c | 296 | ndm->ndm_state = fdb->state; |
297 | ndm->ndm_ifindex = vxlan->dev->ifindex; | |
ae884082 | 298 | ndm->ndm_flags = fdb->flags; |
1274e1cc | 299 | if (rdst && rdst->offloaded) |
0efe1173 | 300 | ndm->ndm_flags |= NTF_OFFLOADED; |
545469f7 | 301 | ndm->ndm_type = RTN_UNICAST; |
d342894c | 302 | |
193523bf | 303 | if (!net_eq(dev_net(vxlan->dev), vxlan->net) && |
4967082b | 304 | nla_put_s32(skb, NDA_LINK_NETNSID, |
38f507f1 | 305 | peernet2id(dev_net(vxlan->dev), vxlan->net))) |
193523bf ND |
306 | goto nla_put_failure; |
307 | ||
e4f67add | 308 | if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr)) |
d342894c | 309 | goto nla_put_failure; |
1274e1cc | 310 | if (nh) { |
06ec313e | 311 | if (nla_put_u32(skb, NDA_NH_ID, nh_id)) |
1274e1cc RP |
312 | goto nla_put_failure; |
313 | } else if (rdst) { | |
314 | if (send_ip && vxlan_nla_put_addr(skb, NDA_DST, | |
315 | &rdst->remote_ip)) | |
316 | goto nla_put_failure; | |
317 | ||
318 | if (rdst->remote_port && | |
319 | rdst->remote_port != vxlan->cfg.dst_port && | |
320 | nla_put_be16(skb, NDA_PORT, rdst->remote_port)) | |
321 | goto nla_put_failure; | |
322 | if (rdst->remote_vni != vxlan->default_dst.remote_vni && | |
323 | nla_put_u32(skb, NDA_VNI, be32_to_cpu(rdst->remote_vni))) | |
324 | goto nla_put_failure; | |
325 | if (rdst->remote_ifindex && | |
326 | nla_put_u32(skb, NDA_IFINDEX, rdst->remote_ifindex)) | |
327 | goto nla_put_failure; | |
328 | } | |
d342894c | 329 | |
dc5321d7 | 330 | if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && fdb->vni && |
3ad7a4b1 RP |
331 | nla_put_u32(skb, NDA_SRC_VNI, |
332 | be32_to_cpu(fdb->vni))) | |
333 | goto nla_put_failure; | |
d342894c | 334 | |
335 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); | |
336 | ci.ndm_confirmed = 0; | |
337 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
338 | ci.ndm_refcnt = 0; | |
339 | ||
340 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
341 | goto nla_put_failure; | |
342 | ||
053c095a JB |
343 | nlmsg_end(skb, nlh); |
344 | return 0; | |
d342894c | 345 | |
346 | nla_put_failure: | |
347 | nlmsg_cancel(skb, nlh); | |
348 | return -EMSGSIZE; | |
349 | } | |
350 | ||
351 | static inline size_t vxlan_nlmsg_size(void) | |
352 | { | |
353 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
354 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
e4c7ed41 | 355 | + nla_total_size(sizeof(struct in6_addr)) /* NDA_DST */ |
73cf3317 | 356 | + nla_total_size(sizeof(__be16)) /* NDA_PORT */ |
6681712d DS |
357 | + nla_total_size(sizeof(__be32)) /* NDA_VNI */ |
358 | + nla_total_size(sizeof(__u32)) /* NDA_IFINDEX */ | |
4967082b | 359 | + nla_total_size(sizeof(__s32)) /* NDA_LINK_NETNSID */ |
d342894c | 360 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
361 | } | |
362 | ||
9a997353 PM |
363 | static void __vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
364 | struct vxlan_rdst *rd, int type) | |
d342894c | 365 | { |
366 | struct net *net = dev_net(vxlan->dev); | |
367 | struct sk_buff *skb; | |
368 | int err = -ENOBUFS; | |
369 | ||
370 | skb = nlmsg_new(vxlan_nlmsg_size(), GFP_ATOMIC); | |
371 | if (skb == NULL) | |
372 | goto errout; | |
373 | ||
9e4b93f9 | 374 | err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, rd); |
d342894c | 375 | if (err < 0) { |
376 | /* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */ | |
377 | WARN_ON(err == -EMSGSIZE); | |
378 | kfree_skb(skb); | |
379 | goto errout; | |
380 | } | |
381 | ||
382 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
383 | return; | |
384 | errout: | |
385 | if (err < 0) | |
386 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
387 | } | |
388 | ||
ff23b91c PM |
389 | static void vxlan_fdb_switchdev_notifier_info(const struct vxlan_dev *vxlan, |
390 | const struct vxlan_fdb *fdb, | |
391 | const struct vxlan_rdst *rd, | |
4c59b7d1 | 392 | struct netlink_ext_ack *extack, |
ff23b91c PM |
393 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) |
394 | { | |
395 | fdb_info->info.dev = vxlan->dev; | |
4c59b7d1 | 396 | fdb_info->info.extack = extack; |
ff23b91c PM |
397 | fdb_info->remote_ip = rd->remote_ip; |
398 | fdb_info->remote_port = rd->remote_port; | |
399 | fdb_info->remote_vni = rd->remote_vni; | |
400 | fdb_info->remote_ifindex = rd->remote_ifindex; | |
401 | memcpy(fdb_info->eth_addr, fdb->eth_addr, ETH_ALEN); | |
402 | fdb_info->vni = fdb->vni; | |
403 | fdb_info->offloaded = rd->offloaded; | |
404 | fdb_info->added_by_user = fdb->flags & NTF_VXLAN_ADDED_BY_USER; | |
405 | } | |
406 | ||
61f46fe8 PM |
407 | static int vxlan_fdb_switchdev_call_notifiers(struct vxlan_dev *vxlan, |
408 | struct vxlan_fdb *fdb, | |
409 | struct vxlan_rdst *rd, | |
4c59b7d1 PM |
410 | bool adding, |
411 | struct netlink_ext_ack *extack) | |
9a997353 PM |
412 | { |
413 | struct switchdev_notifier_vxlan_fdb_info info; | |
414 | enum switchdev_notifier_type notifier_type; | |
61f46fe8 | 415 | int ret; |
9a997353 PM |
416 | |
417 | if (WARN_ON(!rd)) | |
61f46fe8 | 418 | return 0; |
9a997353 PM |
419 | |
420 | notifier_type = adding ? SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE | |
421 | : SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE; | |
4c59b7d1 | 422 | vxlan_fdb_switchdev_notifier_info(vxlan, fdb, rd, NULL, &info); |
61f46fe8 | 423 | ret = call_switchdev_notifiers(notifier_type, vxlan->dev, |
6685987c | 424 | &info.info, extack); |
61f46fe8 | 425 | return notifier_to_errno(ret); |
9a997353 PM |
426 | } |
427 | ||
61f46fe8 | 428 | static int vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
4c59b7d1 PM |
429 | struct vxlan_rdst *rd, int type, bool swdev_notify, |
430 | struct netlink_ext_ack *extack) | |
9a997353 | 431 | { |
61f46fe8 PM |
432 | int err; |
433 | ||
1274e1cc | 434 | if (swdev_notify && rd) { |
0e6160f3 PM |
435 | switch (type) { |
436 | case RTM_NEWNEIGH: | |
61f46fe8 | 437 | err = vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd, |
4c59b7d1 | 438 | true, extack); |
61f46fe8 PM |
439 | if (err) |
440 | return err; | |
0e6160f3 PM |
441 | break; |
442 | case RTM_DELNEIGH: | |
443 | vxlan_fdb_switchdev_call_notifiers(vxlan, fdb, rd, | |
4c59b7d1 | 444 | false, extack); |
0e6160f3 PM |
445 | break; |
446 | } | |
9a997353 PM |
447 | } |
448 | ||
449 | __vxlan_fdb_notify(vxlan, fdb, rd, type); | |
61f46fe8 | 450 | return 0; |
9a997353 PM |
451 | } |
452 | ||
e4c7ed41 | 453 | static void vxlan_ip_miss(struct net_device *dev, union vxlan_addr *ipa) |
e4f67add DS |
454 | { |
455 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
bb3fd687 SH |
456 | struct vxlan_fdb f = { |
457 | .state = NUD_STALE, | |
458 | }; | |
459 | struct vxlan_rdst remote = { | |
e4c7ed41 | 460 | .remote_ip = *ipa, /* goes to NDA_DST */ |
54bfd872 | 461 | .remote_vni = cpu_to_be32(VXLAN_N_VID), |
bb3fd687 | 462 | }; |
3e61aa8f | 463 | |
4c59b7d1 | 464 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true, NULL); |
e4f67add DS |
465 | } |
466 | ||
467 | static void vxlan_fdb_miss(struct vxlan_dev *vxlan, const u8 eth_addr[ETH_ALEN]) | |
468 | { | |
bb3fd687 SH |
469 | struct vxlan_fdb f = { |
470 | .state = NUD_STALE, | |
471 | }; | |
9e4b93f9 | 472 | struct vxlan_rdst remote = { }; |
e4f67add | 473 | |
e4f67add DS |
474 | memcpy(f.eth_addr, eth_addr, ETH_ALEN); |
475 | ||
4c59b7d1 | 476 | vxlan_fdb_notify(vxlan, &f, &remote, RTM_GETNEIGH, true, NULL); |
e4f67add DS |
477 | } |
478 | ||
d342894c | 479 | /* Hash Ethernet address */ |
480 | static u32 eth_hash(const unsigned char *addr) | |
481 | { | |
482 | u64 value = get_unaligned((u64 *)addr); | |
483 | ||
484 | /* only want 6 bytes */ | |
485 | #ifdef __BIG_ENDIAN | |
d342894c | 486 | value >>= 16; |
321fb991 | 487 | #else |
488 | value <<= 16; | |
d342894c | 489 | #endif |
490 | return hash_64(value, FDB_HASH_BITS); | |
491 | } | |
492 | ||
3ad7a4b1 RP |
493 | static u32 eth_vni_hash(const unsigned char *addr, __be32 vni) |
494 | { | |
495 | /* use 1 byte of OUI and 3 bytes of NIC */ | |
496 | u32 key = get_unaligned((u32 *)(addr + 2)); | |
497 | ||
498 | return jhash_2words(key, vni, vxlan_salt) & (FDB_HASH_SIZE - 1); | |
499 | } | |
500 | ||
fe1e0713 L |
501 | static u32 fdb_head_index(struct vxlan_dev *vxlan, const u8 *mac, __be32 vni) |
502 | { | |
503 | if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) | |
504 | return eth_vni_hash(mac, vni); | |
505 | else | |
506 | return eth_hash(mac); | |
507 | } | |
508 | ||
d342894c | 509 | /* Hash chain to use given mac address */ |
510 | static inline struct hlist_head *vxlan_fdb_head(struct vxlan_dev *vxlan, | |
3ad7a4b1 | 511 | const u8 *mac, __be32 vni) |
d342894c | 512 | { |
fe1e0713 | 513 | return &vxlan->fdb_head[fdb_head_index(vxlan, mac, vni)]; |
d342894c | 514 | } |
515 | ||
516 | /* Look up Ethernet address in forwarding table */ | |
014be2c8 | 517 | static struct vxlan_fdb *__vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 518 | const u8 *mac, __be32 vni) |
d342894c | 519 | { |
3ad7a4b1 | 520 | struct hlist_head *head = vxlan_fdb_head(vxlan, mac, vni); |
d342894c | 521 | struct vxlan_fdb *f; |
d342894c | 522 | |
b67bfe0d | 523 | hlist_for_each_entry_rcu(f, head, hlist) { |
3ad7a4b1 | 524 | if (ether_addr_equal(mac, f->eth_addr)) { |
dc5321d7 | 525 | if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) { |
3ad7a4b1 RP |
526 | if (vni == f->vni) |
527 | return f; | |
528 | } else { | |
529 | return f; | |
530 | } | |
531 | } | |
d342894c | 532 | } |
533 | ||
534 | return NULL; | |
535 | } | |
536 | ||
014be2c8 | 537 | static struct vxlan_fdb *vxlan_find_mac(struct vxlan_dev *vxlan, |
3ad7a4b1 | 538 | const u8 *mac, __be32 vni) |
014be2c8 SS |
539 | { |
540 | struct vxlan_fdb *f; | |
541 | ||
3ad7a4b1 | 542 | f = __vxlan_find_mac(vxlan, mac, vni); |
016f3d18 | 543 | if (f && f->used != jiffies) |
014be2c8 SS |
544 | f->used = jiffies; |
545 | ||
546 | return f; | |
547 | } | |
548 | ||
a5e7c10a MR |
549 | /* caller should hold vxlan->hash_lock */ |
550 | static struct vxlan_rdst *vxlan_fdb_find_rdst(struct vxlan_fdb *f, | |
e4c7ed41 | 551 | union vxlan_addr *ip, __be16 port, |
54bfd872 | 552 | __be32 vni, __u32 ifindex) |
6681712d | 553 | { |
3e61aa8f | 554 | struct vxlan_rdst *rd; |
6681712d | 555 | |
3e61aa8f | 556 | list_for_each_entry(rd, &f->remotes, list) { |
e4c7ed41 | 557 | if (vxlan_addr_equal(&rd->remote_ip, ip) && |
6681712d DS |
558 | rd->remote_port == port && |
559 | rd->remote_vni == vni && | |
560 | rd->remote_ifindex == ifindex) | |
a5e7c10a | 561 | return rd; |
6681712d | 562 | } |
3e61aa8f | 563 | |
a5e7c10a MR |
564 | return NULL; |
565 | } | |
566 | ||
1941f1d6 PM |
567 | int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, |
568 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
569 | { | |
570 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
571 | u8 eth_addr[ETH_ALEN + 2] = { 0 }; | |
572 | struct vxlan_rdst *rdst; | |
573 | struct vxlan_fdb *f; | |
574 | int rc = 0; | |
575 | ||
576 | if (is_multicast_ether_addr(mac) || | |
577 | is_zero_ether_addr(mac)) | |
578 | return -EINVAL; | |
579 | ||
580 | ether_addr_copy(eth_addr, mac); | |
581 | ||
582 | rcu_read_lock(); | |
583 | ||
584 | f = __vxlan_find_mac(vxlan, eth_addr, vni); | |
585 | if (!f) { | |
586 | rc = -ENOENT; | |
587 | goto out; | |
588 | } | |
589 | ||
590 | rdst = first_remote_rcu(f); | |
4c59b7d1 | 591 | vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, NULL, fdb_info); |
1941f1d6 PM |
592 | |
593 | out: | |
594 | rcu_read_unlock(); | |
595 | return rc; | |
596 | } | |
597 | EXPORT_SYMBOL_GPL(vxlan_fdb_find_uc); | |
598 | ||
4f89f5b5 PM |
599 | static int vxlan_fdb_notify_one(struct notifier_block *nb, |
600 | const struct vxlan_dev *vxlan, | |
601 | const struct vxlan_fdb *f, | |
4c59b7d1 PM |
602 | const struct vxlan_rdst *rdst, |
603 | struct netlink_ext_ack *extack) | |
4f89f5b5 PM |
604 | { |
605 | struct switchdev_notifier_vxlan_fdb_info fdb_info; | |
606 | int rc; | |
607 | ||
4c59b7d1 | 608 | vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, extack, &fdb_info); |
4f89f5b5 PM |
609 | rc = nb->notifier_call(nb, SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE, |
610 | &fdb_info); | |
611 | return notifier_to_errno(rc); | |
612 | } | |
613 | ||
614 | int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, | |
4c59b7d1 PM |
615 | struct notifier_block *nb, |
616 | struct netlink_ext_ack *extack) | |
4f89f5b5 PM |
617 | { |
618 | struct vxlan_dev *vxlan; | |
619 | struct vxlan_rdst *rdst; | |
620 | struct vxlan_fdb *f; | |
621 | unsigned int h; | |
622 | int rc = 0; | |
623 | ||
624 | if (!netif_is_vxlan(dev)) | |
625 | return -EINVAL; | |
626 | vxlan = netdev_priv(dev); | |
627 | ||
4f89f5b5 | 628 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
fe1e0713 | 629 | spin_lock_bh(&vxlan->hash_lock[h]); |
4f89f5b5 PM |
630 | hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist) { |
631 | if (f->vni == vni) { | |
632 | list_for_each_entry(rdst, &f->remotes, list) { | |
633 | rc = vxlan_fdb_notify_one(nb, vxlan, | |
4c59b7d1 PM |
634 | f, rdst, |
635 | extack); | |
4f89f5b5 | 636 | if (rc) |
fe1e0713 | 637 | goto unlock; |
4f89f5b5 PM |
638 | } |
639 | } | |
640 | } | |
fe1e0713 | 641 | spin_unlock_bh(&vxlan->hash_lock[h]); |
4f89f5b5 | 642 | } |
fe1e0713 | 643 | return 0; |
4f89f5b5 | 644 | |
fe1e0713 L |
645 | unlock: |
646 | spin_unlock_bh(&vxlan->hash_lock[h]); | |
4f89f5b5 PM |
647 | return rc; |
648 | } | |
649 | EXPORT_SYMBOL_GPL(vxlan_fdb_replay); | |
650 | ||
e5ff4b19 PM |
651 | void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni) |
652 | { | |
653 | struct vxlan_dev *vxlan; | |
654 | struct vxlan_rdst *rdst; | |
655 | struct vxlan_fdb *f; | |
656 | unsigned int h; | |
657 | ||
658 | if (!netif_is_vxlan(dev)) | |
659 | return; | |
660 | vxlan = netdev_priv(dev); | |
661 | ||
e5ff4b19 | 662 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
fe1e0713 | 663 | spin_lock_bh(&vxlan->hash_lock[h]); |
e5ff4b19 PM |
664 | hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist) |
665 | if (f->vni == vni) | |
666 | list_for_each_entry(rdst, &f->remotes, list) | |
667 | rdst->offloaded = false; | |
fe1e0713 | 668 | spin_unlock_bh(&vxlan->hash_lock[h]); |
e5ff4b19 | 669 | } |
fe1e0713 | 670 | |
e5ff4b19 PM |
671 | } |
672 | EXPORT_SYMBOL_GPL(vxlan_fdb_clear_offload); | |
673 | ||
906dc186 TR |
674 | /* Replace destination of unicast mac */ |
675 | static int vxlan_fdb_replace(struct vxlan_fdb *f, | |
54bfd872 | 676 | union vxlan_addr *ip, __be16 port, __be32 vni, |
ccdfd4f7 | 677 | __u32 ifindex, struct vxlan_rdst *oldrd) |
906dc186 TR |
678 | { |
679 | struct vxlan_rdst *rd; | |
680 | ||
681 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
682 | if (rd) | |
683 | return 0; | |
684 | ||
685 | rd = list_first_entry_or_null(&f->remotes, struct vxlan_rdst, list); | |
686 | if (!rd) | |
687 | return 0; | |
0c1d70af | 688 | |
ccdfd4f7 | 689 | *oldrd = *rd; |
0c1d70af | 690 | dst_cache_reset(&rd->dst_cache); |
e4c7ed41 | 691 | rd->remote_ip = *ip; |
906dc186 TR |
692 | rd->remote_port = port; |
693 | rd->remote_vni = vni; | |
694 | rd->remote_ifindex = ifindex; | |
6ad0b5a4 | 695 | rd->offloaded = false; |
906dc186 TR |
696 | return 1; |
697 | } | |
698 | ||
a5e7c10a MR |
699 | /* Add/update destinations for multicast */ |
700 | static int vxlan_fdb_append(struct vxlan_fdb *f, | |
54bfd872 | 701 | union vxlan_addr *ip, __be16 port, __be32 vni, |
9e4b93f9 | 702 | __u32 ifindex, struct vxlan_rdst **rdp) |
a5e7c10a MR |
703 | { |
704 | struct vxlan_rdst *rd; | |
705 | ||
706 | rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); | |
707 | if (rd) | |
708 | return 0; | |
709 | ||
6681712d DS |
710 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
711 | if (rd == NULL) | |
712 | return -ENOBUFS; | |
0c1d70af PA |
713 | |
714 | if (dst_cache_init(&rd->dst_cache, GFP_ATOMIC)) { | |
715 | kfree(rd); | |
716 | return -ENOBUFS; | |
717 | } | |
718 | ||
e4c7ed41 | 719 | rd->remote_ip = *ip; |
6681712d | 720 | rd->remote_port = port; |
0efe1173 | 721 | rd->offloaded = false; |
6681712d DS |
722 | rd->remote_vni = vni; |
723 | rd->remote_ifindex = ifindex; | |
3e61aa8f SH |
724 | |
725 | list_add_tail_rcu(&rd->list, &f->remotes); | |
726 | ||
9e4b93f9 | 727 | *rdp = rd; |
6681712d DS |
728 | return 1; |
729 | } | |
730 | ||
dfd8645e TH |
731 | static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb, |
732 | unsigned int off, | |
733 | struct vxlanhdr *vh, size_t hdrlen, | |
54bfd872 JB |
734 | __be32 vni_field, |
735 | struct gro_remcsum *grc, | |
0ace2ca8 | 736 | bool nopartial) |
dfd8645e | 737 | { |
b7fe10e5 | 738 | size_t start, offset; |
dfd8645e TH |
739 | |
740 | if (skb->remcsum_offload) | |
b7fe10e5 | 741 | return vh; |
dfd8645e TH |
742 | |
743 | if (!NAPI_GRO_CB(skb)->csum_valid) | |
744 | return NULL; | |
745 | ||
54bfd872 JB |
746 | start = vxlan_rco_start(vni_field); |
747 | offset = start + vxlan_rco_offset(vni_field); | |
dfd8645e | 748 | |
b7fe10e5 TH |
749 | vh = skb_gro_remcsum_process(skb, (void *)vh, off, hdrlen, |
750 | start, offset, grc, nopartial); | |
dfd8645e TH |
751 | |
752 | skb->remcsum_offload = 1; | |
753 | ||
754 | return vh; | |
755 | } | |
756 | ||
d4546c25 DM |
757 | static struct sk_buff *vxlan_gro_receive(struct sock *sk, |
758 | struct list_head *head, | |
759 | struct sk_buff *skb) | |
dc01e7d3 | 760 | { |
d4546c25 DM |
761 | struct sk_buff *pp = NULL; |
762 | struct sk_buff *p; | |
dc01e7d3 | 763 | struct vxlanhdr *vh, *vh2; |
9b174d88 | 764 | unsigned int hlen, off_vx; |
dc01e7d3 | 765 | int flush = 1; |
5602c48c | 766 | struct vxlan_sock *vs = rcu_dereference_sk_user_data(sk); |
54bfd872 | 767 | __be32 flags; |
26c4f7da TH |
768 | struct gro_remcsum grc; |
769 | ||
770 | skb_gro_remcsum_init(&grc); | |
dc01e7d3 OG |
771 | |
772 | off_vx = skb_gro_offset(skb); | |
773 | hlen = off_vx + sizeof(*vh); | |
774 | vh = skb_gro_header_fast(skb, off_vx); | |
775 | if (skb_gro_header_hard(skb, hlen)) { | |
776 | vh = skb_gro_header_slow(skb, hlen, off_vx); | |
777 | if (unlikely(!vh)) | |
778 | goto out; | |
779 | } | |
dc01e7d3 | 780 | |
dfd8645e TH |
781 | skb_gro_postpull_rcsum(skb, vh, sizeof(struct vxlanhdr)); |
782 | ||
54bfd872 | 783 | flags = vh->vx_flags; |
dfd8645e TH |
784 | |
785 | if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) { | |
786 | vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr), | |
54bfd872 | 787 | vh->vx_vni, &grc, |
0ace2ca8 TH |
788 | !!(vs->flags & |
789 | VXLAN_F_REMCSUM_NOPARTIAL)); | |
dfd8645e TH |
790 | |
791 | if (!vh) | |
792 | goto out; | |
793 | } | |
794 | ||
b7fe10e5 TH |
795 | skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */ |
796 | ||
d4546c25 | 797 | list_for_each_entry(p, head, list) { |
dc01e7d3 OG |
798 | if (!NAPI_GRO_CB(p)->same_flow) |
799 | continue; | |
800 | ||
801 | vh2 = (struct vxlanhdr *)(p->data + off_vx); | |
3511494c TG |
802 | if (vh->vx_flags != vh2->vx_flags || |
803 | vh->vx_vni != vh2->vx_vni) { | |
dc01e7d3 OG |
804 | NAPI_GRO_CB(p)->same_flow = 0; |
805 | continue; | |
806 | } | |
dc01e7d3 OG |
807 | } |
808 | ||
fcd91dd4 | 809 | pp = call_gro_receive(eth_gro_receive, head, skb); |
c194cf93 | 810 | flush = 0; |
dc01e7d3 | 811 | |
dc01e7d3 | 812 | out: |
603d4cf8 | 813 | skb_gro_flush_final_remcsum(skb, pp, flush, &grc); |
dc01e7d3 OG |
814 | |
815 | return pp; | |
816 | } | |
817 | ||
5602c48c | 818 | static int vxlan_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff) |
dc01e7d3 | 819 | { |
229740c6 JR |
820 | /* Sets 'skb->inner_mac_header' since we are always called with |
821 | * 'skb->encapsulation' set. | |
822 | */ | |
9b174d88 | 823 | return eth_gro_complete(skb, nhoff + sizeof(struct vxlanhdr)); |
dc01e7d3 OG |
824 | } |
825 | ||
c7cdbe2e RP |
826 | static struct vxlan_fdb *vxlan_fdb_alloc(struct vxlan_dev *vxlan, const u8 *mac, |
827 | __u16 state, __be32 src_vni, | |
828 | __u16 ndm_flags) | |
25e20e73 RP |
829 | { |
830 | struct vxlan_fdb *f; | |
831 | ||
832 | f = kmalloc(sizeof(*f), GFP_ATOMIC); | |
833 | if (!f) | |
834 | return NULL; | |
835 | f->state = state; | |
836 | f->flags = ndm_flags; | |
837 | f->updated = f->used = jiffies; | |
838 | f->vni = src_vni; | |
1274e1cc | 839 | f->nh = NULL; |
79472fe8 | 840 | RCU_INIT_POINTER(f->vdev, vxlan); |
1274e1cc | 841 | INIT_LIST_HEAD(&f->nh_list); |
25e20e73 RP |
842 | INIT_LIST_HEAD(&f->remotes); |
843 | memcpy(f->eth_addr, mac, ETH_ALEN); | |
844 | ||
845 | return f; | |
846 | } | |
847 | ||
7c31e54a TY |
848 | static void vxlan_fdb_insert(struct vxlan_dev *vxlan, const u8 *mac, |
849 | __be32 src_vni, struct vxlan_fdb *f) | |
850 | { | |
851 | ++vxlan->addrcnt; | |
852 | hlist_add_head_rcu(&f->hlist, | |
853 | vxlan_fdb_head(vxlan, mac, src_vni)); | |
854 | } | |
855 | ||
1274e1cc RP |
856 | static int vxlan_fdb_nh_update(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb, |
857 | u32 nhid, struct netlink_ext_ack *extack) | |
858 | { | |
859 | struct nexthop *old_nh = rtnl_dereference(fdb->nh); | |
1274e1cc RP |
860 | struct nexthop *nh; |
861 | int err = -EINVAL; | |
862 | ||
863 | if (old_nh && old_nh->id == nhid) | |
864 | return 0; | |
865 | ||
866 | nh = nexthop_find_by_id(vxlan->net, nhid); | |
867 | if (!nh) { | |
868 | NL_SET_ERR_MSG(extack, "Nexthop id does not exist"); | |
869 | goto err_inval; | |
870 | } | |
871 | ||
872 | if (nh) { | |
873 | if (!nexthop_get(nh)) { | |
874 | NL_SET_ERR_MSG(extack, "Nexthop has been deleted"); | |
875 | nh = NULL; | |
876 | goto err_inval; | |
877 | } | |
ce9ac056 | 878 | if (!nexthop_is_fdb(nh)) { |
1274e1cc RP |
879 | NL_SET_ERR_MSG(extack, "Nexthop is not a fdb nexthop"); |
880 | goto err_inval; | |
881 | } | |
882 | ||
50cb8769 | 883 | if (!nexthop_is_multipath(nh)) { |
1274e1cc RP |
884 | NL_SET_ERR_MSG(extack, "Nexthop is not a multipath group"); |
885 | goto err_inval; | |
886 | } | |
887 | ||
888 | /* check nexthop group family */ | |
1274e1cc RP |
889 | switch (vxlan->default_dst.remote_ip.sa.sa_family) { |
890 | case AF_INET: | |
50cb8769 | 891 | if (!nexthop_has_v4(nh)) { |
1274e1cc RP |
892 | err = -EAFNOSUPPORT; |
893 | NL_SET_ERR_MSG(extack, "Nexthop group family not supported"); | |
894 | goto err_inval; | |
895 | } | |
896 | break; | |
897 | case AF_INET6: | |
50cb8769 | 898 | if (nexthop_has_v4(nh)) { |
1274e1cc RP |
899 | err = -EAFNOSUPPORT; |
900 | NL_SET_ERR_MSG(extack, "Nexthop group family not supported"); | |
901 | goto err_inval; | |
902 | } | |
903 | } | |
904 | } | |
905 | ||
906 | if (old_nh) { | |
907 | list_del_rcu(&fdb->nh_list); | |
908 | nexthop_put(old_nh); | |
909 | } | |
910 | rcu_assign_pointer(fdb->nh, nh); | |
911 | list_add_tail_rcu(&fdb->nh_list, &nh->fdb_list); | |
912 | return 1; | |
913 | ||
914 | err_inval: | |
915 | if (nh) | |
916 | nexthop_put(nh); | |
917 | return err; | |
918 | } | |
919 | ||
d342894c | 920 | static int vxlan_fdb_create(struct vxlan_dev *vxlan, |
25e20e73 RP |
921 | const u8 *mac, union vxlan_addr *ip, |
922 | __u16 state, __be16 port, __be32 src_vni, | |
45598c1c | 923 | __be32 vni, __u32 ifindex, __u16 ndm_flags, |
1274e1cc RP |
924 | u32 nhid, struct vxlan_fdb **fdb, |
925 | struct netlink_ext_ack *extack) | |
25e20e73 RP |
926 | { |
927 | struct vxlan_rdst *rd = NULL; | |
928 | struct vxlan_fdb *f; | |
929 | int rc; | |
930 | ||
931 | if (vxlan->cfg.addrmax && | |
932 | vxlan->addrcnt >= vxlan->cfg.addrmax) | |
933 | return -ENOSPC; | |
934 | ||
935 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); | |
c7cdbe2e | 936 | f = vxlan_fdb_alloc(vxlan, mac, state, src_vni, ndm_flags); |
25e20e73 RP |
937 | if (!f) |
938 | return -ENOMEM; | |
939 | ||
1274e1cc RP |
940 | if (nhid) |
941 | rc = vxlan_fdb_nh_update(vxlan, f, nhid, extack); | |
942 | else | |
943 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); | |
944 | if (rc < 0) | |
945 | goto errout; | |
25e20e73 | 946 | |
25e20e73 RP |
947 | *fdb = f; |
948 | ||
949 | return 0; | |
1274e1cc RP |
950 | |
951 | errout: | |
952 | kfree(f); | |
953 | return rc; | |
25e20e73 RP |
954 | } |
955 | ||
7c31e54a | 956 | static void __vxlan_fdb_free(struct vxlan_fdb *f) |
c2b200e0 | 957 | { |
c2b200e0 | 958 | struct vxlan_rdst *rd, *nd; |
1274e1cc RP |
959 | struct nexthop *nh; |
960 | ||
961 | nh = rcu_dereference_raw(f->nh); | |
962 | if (nh) { | |
963 | rcu_assign_pointer(f->nh, NULL); | |
79472fe8 | 964 | rcu_assign_pointer(f->vdev, NULL); |
1274e1cc RP |
965 | nexthop_put(nh); |
966 | } | |
c2b200e0 PM |
967 | |
968 | list_for_each_entry_safe(rd, nd, &f->remotes, list) { | |
969 | dst_cache_destroy(&rd->dst_cache); | |
970 | kfree(rd); | |
971 | } | |
972 | kfree(f); | |
973 | } | |
974 | ||
7c31e54a TY |
975 | static void vxlan_fdb_free(struct rcu_head *head) |
976 | { | |
977 | struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); | |
978 | ||
979 | __vxlan_fdb_free(f); | |
980 | } | |
981 | ||
c2b200e0 PM |
982 | static void vxlan_fdb_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f, |
983 | bool do_notify, bool swdev_notify) | |
984 | { | |
985 | struct vxlan_rdst *rd; | |
986 | ||
987 | netdev_dbg(vxlan->dev, "delete %pM\n", f->eth_addr); | |
988 | ||
989 | --vxlan->addrcnt; | |
1274e1cc RP |
990 | if (do_notify) { |
991 | if (rcu_access_pointer(f->nh)) | |
992 | vxlan_fdb_notify(vxlan, f, NULL, RTM_DELNEIGH, | |
4c59b7d1 | 993 | swdev_notify, NULL); |
1274e1cc RP |
994 | else |
995 | list_for_each_entry(rd, &f->remotes, list) | |
996 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH, | |
997 | swdev_notify, NULL); | |
998 | } | |
c2b200e0 PM |
999 | |
1000 | hlist_del_rcu(&f->hlist); | |
79472fe8 | 1001 | list_del_rcu(&f->nh_list); |
c2b200e0 PM |
1002 | call_rcu(&f->rcu, vxlan_fdb_free); |
1003 | } | |
1004 | ||
fc4aa1ca PM |
1005 | static void vxlan_dst_free(struct rcu_head *head) |
1006 | { | |
1007 | struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); | |
1008 | ||
1009 | dst_cache_destroy(&rd->dst_cache); | |
1010 | kfree(rd); | |
1011 | } | |
1012 | ||
a76d1ca2 PM |
1013 | static int vxlan_fdb_update_existing(struct vxlan_dev *vxlan, |
1014 | union vxlan_addr *ip, | |
1015 | __u16 state, __u16 flags, | |
1016 | __be16 port, __be32 vni, | |
1017 | __u32 ifindex, __u16 ndm_flags, | |
1274e1cc | 1018 | struct vxlan_fdb *f, u32 nhid, |
4c59b7d1 PM |
1019 | bool swdev_notify, |
1020 | struct netlink_ext_ack *extack) | |
d342894c | 1021 | { |
45598c1c | 1022 | __u16 fdb_flags = (ndm_flags & ~NTF_USE); |
9e4b93f9 | 1023 | struct vxlan_rdst *rd = NULL; |
ccdfd4f7 | 1024 | struct vxlan_rdst oldrd; |
d342894c | 1025 | int notify = 0; |
61f46fe8 PM |
1026 | int rc = 0; |
1027 | int err; | |
d342894c | 1028 | |
1274e1cc RP |
1029 | if (nhid && !rcu_access_pointer(f->nh)) { |
1030 | NL_SET_ERR_MSG(extack, | |
1031 | "Cannot replace an existing non nexthop fdb with a nexthop"); | |
1032 | return -EOPNOTSUPP; | |
1033 | } | |
1034 | ||
1035 | if (nhid && (flags & NLM_F_APPEND)) { | |
1036 | NL_SET_ERR_MSG(extack, | |
1037 | "Cannot append to a nexthop fdb"); | |
1038 | return -EOPNOTSUPP; | |
1039 | } | |
1040 | ||
a76d1ca2 PM |
1041 | /* Do not allow an externally learned entry to take over an entry added |
1042 | * by the user. | |
1043 | */ | |
1044 | if (!(fdb_flags & NTF_EXT_LEARNED) || | |
1045 | !(f->flags & NTF_VXLAN_ADDED_BY_USER)) { | |
1046 | if (f->state != state) { | |
1047 | f->state = state; | |
1048 | f->updated = jiffies; | |
1049 | notify = 1; | |
ae884082 | 1050 | } |
a76d1ca2 PM |
1051 | if (f->flags != fdb_flags) { |
1052 | f->flags = fdb_flags; | |
1053 | f->updated = jiffies; | |
1054 | notify = 1; | |
906dc186 | 1055 | } |
a76d1ca2 | 1056 | } |
6681712d | 1057 | |
a76d1ca2 PM |
1058 | if ((flags & NLM_F_REPLACE)) { |
1059 | /* Only change unicasts */ | |
1060 | if (!(is_multicast_ether_addr(f->eth_addr) || | |
1061 | is_zero_ether_addr(f->eth_addr))) { | |
1274e1cc RP |
1062 | if (nhid) { |
1063 | rc = vxlan_fdb_nh_update(vxlan, f, nhid, extack); | |
1064 | if (rc < 0) | |
1065 | return rc; | |
1066 | } else { | |
1067 | rc = vxlan_fdb_replace(f, ip, port, vni, | |
1068 | ifindex, &oldrd); | |
1069 | } | |
6681712d | 1070 | notify |= rc; |
a76d1ca2 | 1071 | } else { |
1274e1cc | 1072 | NL_SET_ERR_MSG(extack, "Cannot replace non-unicast fdb entries"); |
906dc186 | 1073 | return -EOPNOTSUPP; |
a76d1ca2 PM |
1074 | } |
1075 | } | |
1076 | if ((flags & NLM_F_APPEND) && | |
1077 | (is_multicast_ether_addr(f->eth_addr) || | |
1078 | is_zero_ether_addr(f->eth_addr))) { | |
1079 | rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); | |
906dc186 | 1080 | |
25e20e73 | 1081 | if (rc < 0) |
17b46365 | 1082 | return rc; |
a76d1ca2 | 1083 | notify |= rc; |
d342894c | 1084 | } |
1085 | ||
a76d1ca2 PM |
1086 | if (ndm_flags & NTF_USE) |
1087 | f->used = jiffies; | |
1088 | ||
9e4b93f9 ND |
1089 | if (notify) { |
1090 | if (rd == NULL) | |
1091 | rd = first_remote_rtnl(f); | |
a76d1ca2 | 1092 | |
61f46fe8 | 1093 | err = vxlan_fdb_notify(vxlan, f, rd, RTM_NEWNEIGH, |
4c59b7d1 | 1094 | swdev_notify, extack); |
61f46fe8 PM |
1095 | if (err) |
1096 | goto err_notify; | |
9e4b93f9 | 1097 | } |
d342894c | 1098 | |
1099 | return 0; | |
61f46fe8 PM |
1100 | |
1101 | err_notify: | |
1274e1cc RP |
1102 | if (nhid) |
1103 | return err; | |
61f46fe8 PM |
1104 | if ((flags & NLM_F_REPLACE) && rc) |
1105 | *rd = oldrd; | |
fc4aa1ca | 1106 | else if ((flags & NLM_F_APPEND) && rc) { |
61f46fe8 | 1107 | list_del_rcu(&rd->list); |
fc4aa1ca PM |
1108 | call_rcu(&rd->rcu, vxlan_dst_free); |
1109 | } | |
61f46fe8 | 1110 | return err; |
d342894c | 1111 | } |
1112 | ||
a76d1ca2 PM |
1113 | static int vxlan_fdb_update_create(struct vxlan_dev *vxlan, |
1114 | const u8 *mac, union vxlan_addr *ip, | |
1115 | __u16 state, __u16 flags, | |
1116 | __be16 port, __be32 src_vni, __be32 vni, | |
1274e1cc | 1117 | __u32 ifindex, __u16 ndm_flags, u32 nhid, |
4c59b7d1 PM |
1118 | bool swdev_notify, |
1119 | struct netlink_ext_ack *extack) | |
a76d1ca2 PM |
1120 | { |
1121 | __u16 fdb_flags = (ndm_flags & ~NTF_USE); | |
1122 | struct vxlan_fdb *f; | |
1123 | int rc; | |
1124 | ||
1125 | /* Disallow replace to add a multicast entry */ | |
1126 | if ((flags & NLM_F_REPLACE) && | |
1127 | (is_multicast_ether_addr(mac) || is_zero_ether_addr(mac))) | |
1128 | return -EOPNOTSUPP; | |
1129 | ||
1130 | netdev_dbg(vxlan->dev, "add %pM -> %pIS\n", mac, ip); | |
1131 | rc = vxlan_fdb_create(vxlan, mac, ip, state, port, src_vni, | |
1274e1cc | 1132 | vni, ifindex, fdb_flags, nhid, &f, extack); |
a76d1ca2 PM |
1133 | if (rc < 0) |
1134 | return rc; | |
1135 | ||
7c31e54a | 1136 | vxlan_fdb_insert(vxlan, mac, src_vni, f); |
61f46fe8 | 1137 | rc = vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), RTM_NEWNEIGH, |
4c59b7d1 | 1138 | swdev_notify, extack); |
61f46fe8 PM |
1139 | if (rc) |
1140 | goto err_notify; | |
1141 | ||
a76d1ca2 | 1142 | return 0; |
61f46fe8 PM |
1143 | |
1144 | err_notify: | |
1145 | vxlan_fdb_destroy(vxlan, f, false, false); | |
1146 | return rc; | |
a76d1ca2 PM |
1147 | } |
1148 | ||
1149 | /* Add new entry to forwarding table -- assumes lock held */ | |
1150 | static int vxlan_fdb_update(struct vxlan_dev *vxlan, | |
1151 | const u8 *mac, union vxlan_addr *ip, | |
1152 | __u16 state, __u16 flags, | |
1153 | __be16 port, __be32 src_vni, __be32 vni, | |
1274e1cc | 1154 | __u32 ifindex, __u16 ndm_flags, u32 nhid, |
4c59b7d1 PM |
1155 | bool swdev_notify, |
1156 | struct netlink_ext_ack *extack) | |
a76d1ca2 PM |
1157 | { |
1158 | struct vxlan_fdb *f; | |
1159 | ||
1160 | f = __vxlan_find_mac(vxlan, mac, src_vni); | |
1161 | if (f) { | |
1162 | if (flags & NLM_F_EXCL) { | |
1163 | netdev_dbg(vxlan->dev, | |
1164 | "lost race to create %pM\n", mac); | |
1165 | return -EEXIST; | |
1166 | } | |
1167 | ||
1168 | return vxlan_fdb_update_existing(vxlan, ip, state, flags, port, | |
1169 | vni, ifindex, ndm_flags, f, | |
1274e1cc | 1170 | nhid, swdev_notify, extack); |
a76d1ca2 PM |
1171 | } else { |
1172 | if (!(flags & NLM_F_CREATE)) | |
1173 | return -ENOENT; | |
1174 | ||
1175 | return vxlan_fdb_update_create(vxlan, mac, ip, state, flags, | |
1176 | port, src_vni, vni, ifindex, | |
1274e1cc RP |
1177 | ndm_flags, nhid, swdev_notify, |
1178 | extack); | |
a76d1ca2 PM |
1179 | } |
1180 | } | |
1181 | ||
35cf2845 | 1182 | static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f, |
0e6160f3 | 1183 | struct vxlan_rdst *rd, bool swdev_notify) |
35cf2845 LR |
1184 | { |
1185 | list_del_rcu(&rd->list); | |
4c59b7d1 | 1186 | vxlan_fdb_notify(vxlan, f, rd, RTM_DELNEIGH, swdev_notify, NULL); |
35cf2845 LR |
1187 | call_rcu(&rd->rcu, vxlan_dst_free); |
1188 | } | |
1189 | ||
f0b074be | 1190 | static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan, |
3ad7a4b1 | 1191 | union vxlan_addr *ip, __be16 *port, __be32 *src_vni, |
1274e1cc | 1192 | __be32 *vni, u32 *ifindex, u32 *nhid) |
d342894c | 1193 | { |
6681712d | 1194 | struct net *net = dev_net(vxlan->dev); |
e4c7ed41 | 1195 | int err; |
d342894c | 1196 | |
72b48682 RP |
1197 | if (tb[NDA_NH_ID] && (tb[NDA_DST] || tb[NDA_VNI] || tb[NDA_IFINDEX] || |
1198 | tb[NDA_PORT])) | |
1199 | return -EINVAL; | |
1200 | ||
f0b074be | 1201 | if (tb[NDA_DST]) { |
e4c7ed41 CW |
1202 | err = vxlan_nla_get_addr(ip, tb[NDA_DST]); |
1203 | if (err) | |
1204 | return err; | |
f0b074be | 1205 | } else { |
e4c7ed41 | 1206 | union vxlan_addr *remote = &vxlan->default_dst.remote_ip; |
98c81476 | 1207 | |
e4c7ed41 CW |
1208 | if (remote->sa.sa_family == AF_INET) { |
1209 | ip->sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
1210 | ip->sa.sa_family = AF_INET; | |
1211 | #if IS_ENABLED(CONFIG_IPV6) | |
1212 | } else { | |
1213 | ip->sin6.sin6_addr = in6addr_any; | |
1214 | ip->sa.sa_family = AF_INET6; | |
1215 | #endif | |
1216 | } | |
f0b074be | 1217 | } |
d342894c | 1218 | |
6681712d | 1219 | if (tb[NDA_PORT]) { |
73cf3317 | 1220 | if (nla_len(tb[NDA_PORT]) != sizeof(__be16)) |
6681712d | 1221 | return -EINVAL; |
f0b074be MR |
1222 | *port = nla_get_be16(tb[NDA_PORT]); |
1223 | } else { | |
0dfbdf41 | 1224 | *port = vxlan->cfg.dst_port; |
f0b074be | 1225 | } |
6681712d DS |
1226 | |
1227 | if (tb[NDA_VNI]) { | |
1228 | if (nla_len(tb[NDA_VNI]) != sizeof(u32)) | |
1229 | return -EINVAL; | |
54bfd872 | 1230 | *vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); |
f0b074be MR |
1231 | } else { |
1232 | *vni = vxlan->default_dst.remote_vni; | |
1233 | } | |
6681712d | 1234 | |
3ad7a4b1 RP |
1235 | if (tb[NDA_SRC_VNI]) { |
1236 | if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32)) | |
1237 | return -EINVAL; | |
1238 | *src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI])); | |
1239 | } else { | |
1240 | *src_vni = vxlan->default_dst.remote_vni; | |
1241 | } | |
1242 | ||
6681712d | 1243 | if (tb[NDA_IFINDEX]) { |
5abb0029 | 1244 | struct net_device *tdev; |
6681712d DS |
1245 | |
1246 | if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) | |
1247 | return -EINVAL; | |
f0b074be | 1248 | *ifindex = nla_get_u32(tb[NDA_IFINDEX]); |
73763949 | 1249 | tdev = __dev_get_by_index(net, *ifindex); |
5abb0029 | 1250 | if (!tdev) |
6681712d | 1251 | return -EADDRNOTAVAIL; |
f0b074be MR |
1252 | } else { |
1253 | *ifindex = 0; | |
1254 | } | |
1255 | ||
1274e1cc RP |
1256 | if (tb[NDA_NH_ID]) |
1257 | *nhid = nla_get_u32(tb[NDA_NH_ID]); | |
1258 | else | |
1259 | *nhid = 0; | |
1260 | ||
f0b074be MR |
1261 | return 0; |
1262 | } | |
1263 | ||
1264 | /* Add static entry (via netlink) */ | |
1265 | static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
1266 | struct net_device *dev, | |
87b0984e PM |
1267 | const unsigned char *addr, u16 vid, u16 flags, |
1268 | struct netlink_ext_ack *extack) | |
f0b074be MR |
1269 | { |
1270 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1271 | /* struct net *net = dev_net(vxlan->dev); */ | |
e4c7ed41 | 1272 | union vxlan_addr ip; |
f0b074be | 1273 | __be16 port; |
3ad7a4b1 | 1274 | __be32 src_vni, vni; |
1274e1cc | 1275 | u32 ifindex, nhid; |
fe1e0713 | 1276 | u32 hash_index; |
f0b074be MR |
1277 | int err; |
1278 | ||
1279 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_REACHABLE))) { | |
1280 | pr_info("RTM_NEWNEIGH with invalid state %#x\n", | |
1281 | ndm->ndm_state); | |
1282 | return -EINVAL; | |
1283 | } | |
1284 | ||
1274e1cc | 1285 | if (!tb || (!tb[NDA_DST] && !tb[NDA_NH_ID])) |
f0b074be MR |
1286 | return -EINVAL; |
1287 | ||
1274e1cc RP |
1288 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex, |
1289 | &nhid); | |
f0b074be MR |
1290 | if (err) |
1291 | return err; | |
6681712d | 1292 | |
5933a7bb MR |
1293 | if (vxlan->default_dst.remote_ip.sa.sa_family != ip.sa.sa_family) |
1294 | return -EAFNOSUPPORT; | |
1295 | ||
fe1e0713 L |
1296 | hash_index = fdb_head_index(vxlan, addr, src_vni); |
1297 | spin_lock_bh(&vxlan->hash_lock[hash_index]); | |
25e20e73 | 1298 | err = vxlan_fdb_update(vxlan, addr, &ip, ndm->ndm_state, flags, |
45598c1c PM |
1299 | port, src_vni, vni, ifindex, |
1300 | ndm->ndm_flags | NTF_VXLAN_ADDED_BY_USER, | |
1274e1cc | 1301 | nhid, true, extack); |
fe1e0713 | 1302 | spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
d342894c | 1303 | |
1304 | return err; | |
1305 | } | |
1306 | ||
3ad7a4b1 RP |
1307 | static int __vxlan_fdb_delete(struct vxlan_dev *vxlan, |
1308 | const unsigned char *addr, union vxlan_addr ip, | |
fc39c38b | 1309 | __be16 port, __be32 src_vni, __be32 vni, |
0e6160f3 | 1310 | u32 ifindex, bool swdev_notify) |
d342894c | 1311 | { |
bc7892ba | 1312 | struct vxlan_rdst *rd = NULL; |
1274e1cc | 1313 | struct vxlan_fdb *f; |
3ad7a4b1 | 1314 | int err = -ENOENT; |
bc7892ba | 1315 | |
3ad7a4b1 | 1316 | f = vxlan_find_mac(vxlan, addr, src_vni); |
bc7892ba | 1317 | if (!f) |
3ad7a4b1 | 1318 | return err; |
bc7892ba | 1319 | |
e4c7ed41 CW |
1320 | if (!vxlan_addr_any(&ip)) { |
1321 | rd = vxlan_fdb_find_rdst(f, &ip, port, vni, ifindex); | |
bc7892ba MR |
1322 | if (!rd) |
1323 | goto out; | |
1324 | } | |
1325 | ||
bc7892ba MR |
1326 | /* remove a destination if it's not the only one on the list, |
1327 | * otherwise destroy the fdb entry | |
1328 | */ | |
1329 | if (rd && !list_is_singular(&f->remotes)) { | |
0e6160f3 | 1330 | vxlan_fdb_dst_destroy(vxlan, f, rd, swdev_notify); |
bc7892ba | 1331 | goto out; |
d342894c | 1332 | } |
bc7892ba | 1333 | |
0e6160f3 | 1334 | vxlan_fdb_destroy(vxlan, f, true, swdev_notify); |
bc7892ba MR |
1335 | |
1336 | out: | |
3ad7a4b1 RP |
1337 | return 0; |
1338 | } | |
1339 | ||
1340 | /* Delete entry (via netlink) */ | |
1341 | static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], | |
1342 | struct net_device *dev, | |
1343 | const unsigned char *addr, u16 vid) | |
1344 | { | |
1345 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1346 | union vxlan_addr ip; | |
1347 | __be32 src_vni, vni; | |
1274e1cc | 1348 | u32 ifindex, nhid; |
fe1e0713 | 1349 | u32 hash_index; |
1274e1cc | 1350 | __be16 port; |
3ad7a4b1 RP |
1351 | int err; |
1352 | ||
1274e1cc RP |
1353 | err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex, |
1354 | &nhid); | |
3ad7a4b1 RP |
1355 | if (err) |
1356 | return err; | |
1357 | ||
fe1e0713 L |
1358 | hash_index = fdb_head_index(vxlan, addr, src_vni); |
1359 | spin_lock_bh(&vxlan->hash_lock[hash_index]); | |
0e6160f3 PM |
1360 | err = __vxlan_fdb_delete(vxlan, addr, ip, port, src_vni, vni, ifindex, |
1361 | true); | |
fe1e0713 | 1362 | spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
d342894c | 1363 | |
1364 | return err; | |
1365 | } | |
1366 | ||
1367 | /* Dump forwarding table */ | |
1368 | static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 | 1369 | struct net_device *dev, |
d297653d | 1370 | struct net_device *filter_dev, int *idx) |
d342894c | 1371 | { |
1372 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1373 | unsigned int h; | |
d297653d | 1374 | int err = 0; |
d342894c | 1375 | |
1376 | for (h = 0; h < FDB_HASH_SIZE; ++h) { | |
1377 | struct vxlan_fdb *f; | |
d342894c | 1378 | |
b5141915 | 1379 | rcu_read_lock(); |
b67bfe0d | 1380 | hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) { |
6681712d | 1381 | struct vxlan_rdst *rd; |
6681712d | 1382 | |
1274e1cc | 1383 | if (rcu_access_pointer(f->nh)) { |
b18e9834 RP |
1384 | if (*idx < cb->args[2]) |
1385 | goto skip_nh; | |
1274e1cc RP |
1386 | err = vxlan_fdb_info(skb, vxlan, f, |
1387 | NETLINK_CB(cb->skb).portid, | |
1388 | cb->nlh->nlmsg_seq, | |
1389 | RTM_NEWNEIGH, | |
1390 | NLM_F_MULTI, NULL); | |
b5141915 IS |
1391 | if (err < 0) { |
1392 | rcu_read_unlock(); | |
1274e1cc | 1393 | goto out; |
b5141915 | 1394 | } |
b18e9834 RP |
1395 | skip_nh: |
1396 | *idx += 1; | |
1274e1cc RP |
1397 | continue; |
1398 | } | |
1399 | ||
3e61aa8f | 1400 | list_for_each_entry_rcu(rd, &f->remotes, list) { |
d297653d | 1401 | if (*idx < cb->args[2]) |
07a51cd3 AW |
1402 | goto skip; |
1403 | ||
6681712d DS |
1404 | err = vxlan_fdb_info(skb, vxlan, f, |
1405 | NETLINK_CB(cb->skb).portid, | |
1406 | cb->nlh->nlmsg_seq, | |
1407 | RTM_NEWNEIGH, | |
1408 | NLM_F_MULTI, rd); | |
b5141915 IS |
1409 | if (err < 0) { |
1410 | rcu_read_unlock(); | |
3e61aa8f | 1411 | goto out; |
b5141915 | 1412 | } |
3e61aa8f | 1413 | skip: |
d297653d | 1414 | *idx += 1; |
07a51cd3 | 1415 | } |
d342894c | 1416 | } |
b5141915 | 1417 | rcu_read_unlock(); |
d342894c | 1418 | } |
3e61aa8f | 1419 | out: |
d297653d | 1420 | return err; |
d342894c | 1421 | } |
1422 | ||
474c3c89 RP |
1423 | static int vxlan_fdb_get(struct sk_buff *skb, |
1424 | struct nlattr *tb[], | |
1425 | struct net_device *dev, | |
1426 | const unsigned char *addr, | |
1427 | u16 vid, u32 portid, u32 seq, | |
1428 | struct netlink_ext_ack *extack) | |
1429 | { | |
1430 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1431 | struct vxlan_fdb *f; | |
1432 | __be32 vni; | |
1433 | int err; | |
1434 | ||
1435 | if (tb[NDA_VNI]) | |
1436 | vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI])); | |
1437 | else | |
1438 | vni = vxlan->default_dst.remote_vni; | |
1439 | ||
1440 | rcu_read_lock(); | |
1441 | ||
1442 | f = __vxlan_find_mac(vxlan, addr, vni); | |
1443 | if (!f) { | |
1444 | NL_SET_ERR_MSG(extack, "Fdb entry not found"); | |
1445 | err = -ENOENT; | |
1446 | goto errout; | |
1447 | } | |
1448 | ||
1449 | err = vxlan_fdb_info(skb, vxlan, f, portid, seq, | |
1450 | RTM_NEWNEIGH, 0, first_remote_rcu(f)); | |
1451 | errout: | |
1452 | rcu_read_unlock(); | |
1453 | return err; | |
1454 | } | |
1455 | ||
d342894c | 1456 | /* Watch incoming packets to learn mapping between Ethernet address |
1457 | * and Tunnel endpoint. | |
c4b49512 | 1458 | * Return true if packet is bogus and should be dropped. |
d342894c | 1459 | */ |
26a41ae6 | 1460 | static bool vxlan_snoop(struct net_device *dev, |
3ad7a4b1 | 1461 | union vxlan_addr *src_ip, const u8 *src_mac, |
87613de9 | 1462 | u32 src_ifindex, __be32 vni) |
d342894c | 1463 | { |
1464 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1465 | struct vxlan_fdb *f; | |
87613de9 MS |
1466 | u32 ifindex = 0; |
1467 | ||
1468 | #if IS_ENABLED(CONFIG_IPV6) | |
1469 | if (src_ip->sa.sa_family == AF_INET6 && | |
1470 | (ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL)) | |
1471 | ifindex = src_ifindex; | |
1472 | #endif | |
d342894c | 1473 | |
3ad7a4b1 | 1474 | f = vxlan_find_mac(vxlan, src_mac, vni); |
d342894c | 1475 | if (likely(f)) { |
5ca5461c | 1476 | struct vxlan_rdst *rdst = first_remote_rcu(f); |
3e61aa8f | 1477 | |
87613de9 MS |
1478 | if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) && |
1479 | rdst->remote_ifindex == ifindex)) | |
26a41ae6 | 1480 | return false; |
1481 | ||
1482 | /* Don't migrate static entries, drop packets */ | |
e0090a9e | 1483 | if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
26a41ae6 | 1484 | return true; |
d342894c | 1485 | |
1274e1cc RP |
1486 | /* Don't override an fdb with nexthop with a learnt entry */ |
1487 | if (rcu_access_pointer(f->nh)) | |
1488 | return true; | |
1489 | ||
d342894c | 1490 | if (net_ratelimit()) |
1491 | netdev_info(dev, | |
e4c7ed41 | 1492 | "%pM migrated from %pIS to %pIS\n", |
a4870f79 | 1493 | src_mac, &rdst->remote_ip.sa, &src_ip->sa); |
d342894c | 1494 | |
e4c7ed41 | 1495 | rdst->remote_ip = *src_ip; |
d342894c | 1496 | f->updated = jiffies; |
4c59b7d1 | 1497 | vxlan_fdb_notify(vxlan, f, rdst, RTM_NEWNEIGH, true, NULL); |
d342894c | 1498 | } else { |
fe1e0713 L |
1499 | u32 hash_index = fdb_head_index(vxlan, src_mac, vni); |
1500 | ||
d342894c | 1501 | /* learned new entry */ |
fe1e0713 | 1502 | spin_lock(&vxlan->hash_lock[hash_index]); |
3bf74b1a | 1503 | |
1504 | /* close off race between vxlan_flush and incoming packets */ | |
1505 | if (netif_running(dev)) | |
25e20e73 | 1506 | vxlan_fdb_update(vxlan, src_mac, src_ip, |
3bf74b1a | 1507 | NUD_REACHABLE, |
1508 | NLM_F_EXCL|NLM_F_CREATE, | |
0dfbdf41 | 1509 | vxlan->cfg.dst_port, |
3ad7a4b1 | 1510 | vni, |
3bf74b1a | 1511 | vxlan->default_dst.remote_vni, |
1274e1cc | 1512 | ifindex, NTF_SELF, 0, true, NULL); |
fe1e0713 | 1513 | spin_unlock(&vxlan->hash_lock[hash_index]); |
d342894c | 1514 | } |
26a41ae6 | 1515 | |
1516 | return false; | |
d342894c | 1517 | } |
1518 | ||
d342894c | 1519 | /* See if multicast group is already in use by other ID */ |
95ab0991 | 1520 | static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev) |
d342894c | 1521 | { |
553675fb | 1522 | struct vxlan_dev *vxlan; |
c6fcc4fc | 1523 | struct vxlan_sock *sock4; |
4053ab1b AB |
1524 | #if IS_ENABLED(CONFIG_IPV6) |
1525 | struct vxlan_sock *sock6; | |
1526 | #endif | |
b1be00a6 | 1527 | unsigned short family = dev->default_dst.remote_ip.sa.sa_family; |
d342894c | 1528 | |
c6fcc4fc | 1529 | sock4 = rtnl_dereference(dev->vn4_sock); |
1530 | ||
95ab0991 G |
1531 | /* The vxlan_sock is only used by dev, leaving group has |
1532 | * no effect on other vxlan devices. | |
1533 | */ | |
66af846f | 1534 | if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1) |
95ab0991 | 1535 | return false; |
b1be00a6 | 1536 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1537 | sock6 = rtnl_dereference(dev->vn6_sock); |
66af846f | 1538 | if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1) |
b1be00a6 JB |
1539 | return false; |
1540 | #endif | |
95ab0991 | 1541 | |
553675fb | 1542 | list_for_each_entry(vxlan, &vn->vxlan_list, next) { |
95ab0991 | 1543 | if (!netif_running(vxlan->dev) || vxlan == dev) |
553675fb | 1544 | continue; |
d342894c | 1545 | |
c6fcc4fc | 1546 | if (family == AF_INET && |
1547 | rtnl_dereference(vxlan->vn4_sock) != sock4) | |
95ab0991 | 1548 | continue; |
b1be00a6 | 1549 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1550 | if (family == AF_INET6 && |
1551 | rtnl_dereference(vxlan->vn6_sock) != sock6) | |
b1be00a6 JB |
1552 | continue; |
1553 | #endif | |
95ab0991 G |
1554 | |
1555 | if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, | |
1556 | &dev->default_dst.remote_ip)) | |
1557 | continue; | |
1558 | ||
1559 | if (vxlan->default_dst.remote_ifindex != | |
1560 | dev->default_dst.remote_ifindex) | |
1561 | continue; | |
1562 | ||
1563 | return true; | |
553675fb | 1564 | } |
d342894c | 1565 | |
1566 | return false; | |
1567 | } | |
1568 | ||
544a773a | 1569 | static bool __vxlan_sock_release_prep(struct vxlan_sock *vs) |
7c47cedf | 1570 | { |
b1be00a6 | 1571 | struct vxlan_net *vn; |
012a5729 | 1572 | |
b1be00a6 | 1573 | if (!vs) |
544a773a | 1574 | return false; |
66af846f | 1575 | if (!refcount_dec_and_test(&vs->refcnt)) |
544a773a | 1576 | return false; |
d342894c | 1577 | |
b1be00a6 | 1578 | vn = net_generic(sock_net(vs->sock->sk), vxlan_net_id); |
1c51a915 | 1579 | spin_lock(&vn->sock_lock); |
7c47cedf | 1580 | hlist_del_rcu(&vs->hlist); |
e7b3db5e | 1581 | udp_tunnel_notify_del_rx_port(vs->sock, |
b9adcd69 AD |
1582 | (vs->flags & VXLAN_F_GPE) ? |
1583 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 1584 | UDP_TUNNEL_TYPE_VXLAN); |
1c51a915 SH |
1585 | spin_unlock(&vn->sock_lock); |
1586 | ||
544a773a | 1587 | return true; |
d342894c | 1588 | } |
1589 | ||
b1be00a6 JB |
1590 | static void vxlan_sock_release(struct vxlan_dev *vxlan) |
1591 | { | |
c6fcc4fc | 1592 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
b1be00a6 | 1593 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 1594 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1595 | ||
57d88182 | 1596 | RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
544a773a HFS |
1597 | #endif |
1598 | ||
57d88182 | 1599 | RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
544a773a HFS |
1600 | synchronize_net(); |
1601 | ||
a53cb29b MB |
1602 | vxlan_vs_del_dev(vxlan); |
1603 | ||
c6fcc4fc | 1604 | if (__vxlan_sock_release_prep(sock4)) { |
1605 | udp_tunnel_sock_release(sock4->sock); | |
1606 | kfree(sock4); | |
544a773a HFS |
1607 | } |
1608 | ||
1609 | #if IS_ENABLED(CONFIG_IPV6) | |
c6fcc4fc | 1610 | if (__vxlan_sock_release_prep(sock6)) { |
1611 | udp_tunnel_sock_release(sock6->sock); | |
1612 | kfree(sock6); | |
544a773a | 1613 | } |
b1be00a6 JB |
1614 | #endif |
1615 | } | |
1616 | ||
56ef9c90 | 1617 | /* Update multicast group membership when first VNI on |
c4b49512 | 1618 | * multicast address is brought up |
7c47cedf | 1619 | */ |
56ef9c90 | 1620 | static int vxlan_igmp_join(struct vxlan_dev *vxlan) |
d342894c | 1621 | { |
b1be00a6 | 1622 | struct sock *sk; |
e4c7ed41 CW |
1623 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1624 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1625 | int ret = -EINVAL; |
d342894c | 1626 | |
e4c7ed41 | 1627 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1628 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1629 | struct ip_mreqn mreq = { |
1630 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1631 | .imr_ifindex = ifindex, | |
1632 | }; | |
1633 | ||
c6fcc4fc | 1634 | sk = sock4->sock->sk; |
b1be00a6 | 1635 | lock_sock(sk); |
56ef9c90 | 1636 | ret = ip_mc_join_group(sk, &mreq); |
b1be00a6 | 1637 | release_sock(sk); |
e4c7ed41 CW |
1638 | #if IS_ENABLED(CONFIG_IPV6) |
1639 | } else { | |
c6fcc4fc | 1640 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1641 | ||
1642 | sk = sock6->sock->sk; | |
b1be00a6 | 1643 | lock_sock(sk); |
56ef9c90 MRL |
1644 | ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex, |
1645 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1646 | release_sock(sk); |
e4c7ed41 CW |
1647 | #endif |
1648 | } | |
3fc2de2f | 1649 | |
56ef9c90 | 1650 | return ret; |
3fc2de2f | 1651 | } |
1652 | ||
1653 | /* Inverse of vxlan_igmp_join when last VNI is brought down */ | |
56ef9c90 | 1654 | static int vxlan_igmp_leave(struct vxlan_dev *vxlan) |
3fc2de2f | 1655 | { |
b1be00a6 | 1656 | struct sock *sk; |
e4c7ed41 CW |
1657 | union vxlan_addr *ip = &vxlan->default_dst.remote_ip; |
1658 | int ifindex = vxlan->default_dst.remote_ifindex; | |
149d7549 | 1659 | int ret = -EINVAL; |
3fc2de2f | 1660 | |
e4c7ed41 | 1661 | if (ip->sa.sa_family == AF_INET) { |
c6fcc4fc | 1662 | struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock); |
e4c7ed41 CW |
1663 | struct ip_mreqn mreq = { |
1664 | .imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr, | |
1665 | .imr_ifindex = ifindex, | |
1666 | }; | |
1667 | ||
c6fcc4fc | 1668 | sk = sock4->sock->sk; |
b1be00a6 | 1669 | lock_sock(sk); |
56ef9c90 | 1670 | ret = ip_mc_leave_group(sk, &mreq); |
b1be00a6 | 1671 | release_sock(sk); |
e4c7ed41 CW |
1672 | #if IS_ENABLED(CONFIG_IPV6) |
1673 | } else { | |
c6fcc4fc | 1674 | struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock); |
1675 | ||
1676 | sk = sock6->sock->sk; | |
b1be00a6 | 1677 | lock_sock(sk); |
56ef9c90 MRL |
1678 | ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex, |
1679 | &ip->sin6.sin6_addr); | |
b1be00a6 | 1680 | release_sock(sk); |
e4c7ed41 CW |
1681 | #endif |
1682 | } | |
d342894c | 1683 | |
56ef9c90 | 1684 | return ret; |
d342894c | 1685 | } |
1686 | ||
f14ecebb JB |
1687 | static bool vxlan_remcsum(struct vxlanhdr *unparsed, |
1688 | struct sk_buff *skb, u32 vxflags) | |
dfd8645e | 1689 | { |
7d34fa75 | 1690 | size_t start, offset; |
dfd8645e | 1691 | |
f14ecebb JB |
1692 | if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload) |
1693 | goto out; | |
b7fe10e5 | 1694 | |
f14ecebb JB |
1695 | start = vxlan_rco_start(unparsed->vx_vni); |
1696 | offset = start + vxlan_rco_offset(unparsed->vx_vni); | |
dfd8645e | 1697 | |
7d34fa75 | 1698 | if (!pskb_may_pull(skb, offset + sizeof(u16))) |
be5cfeab | 1699 | return false; |
dfd8645e | 1700 | |
be5cfeab JB |
1701 | skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset, |
1702 | !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL)); | |
f14ecebb JB |
1703 | out: |
1704 | unparsed->vx_flags &= ~VXLAN_HF_RCO; | |
1705 | unparsed->vx_vni &= VXLAN_VNI_MASK; | |
be5cfeab | 1706 | return true; |
dfd8645e TH |
1707 | } |
1708 | ||
f14ecebb | 1709 | static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed, |
64f87d36 | 1710 | struct sk_buff *skb, u32 vxflags, |
10a5af23 | 1711 | struct vxlan_metadata *md) |
3288af08 | 1712 | { |
f14ecebb | 1713 | struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed; |
10a5af23 | 1714 | struct metadata_dst *tun_dst; |
f14ecebb JB |
1715 | |
1716 | if (!(unparsed->vx_flags & VXLAN_HF_GBP)) | |
1717 | goto out; | |
3288af08 | 1718 | |
3288af08 JB |
1719 | md->gbp = ntohs(gbp->policy_id); |
1720 | ||
10a5af23 | 1721 | tun_dst = (struct metadata_dst *)skb_dst(skb); |
810813c4 | 1722 | if (tun_dst) { |
3288af08 | 1723 | tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT; |
810813c4 DM |
1724 | tun_dst->u.tun_info.options_len = sizeof(*md); |
1725 | } | |
3288af08 JB |
1726 | if (gbp->dont_learn) |
1727 | md->gbp |= VXLAN_GBP_DONT_LEARN; | |
1728 | ||
1729 | if (gbp->policy_applied) | |
1730 | md->gbp |= VXLAN_GBP_POLICY_APPLIED; | |
f14ecebb | 1731 | |
64f87d36 JB |
1732 | /* In flow-based mode, GBP is carried in dst_metadata */ |
1733 | if (!(vxflags & VXLAN_F_COLLECT_METADATA)) | |
1734 | skb->mark = md->gbp; | |
f14ecebb JB |
1735 | out: |
1736 | unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS; | |
3288af08 JB |
1737 | } |
1738 | ||
e1e5314d | 1739 | static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed, |
61618eea | 1740 | __be16 *protocol, |
e1e5314d JB |
1741 | struct sk_buff *skb, u32 vxflags) |
1742 | { | |
1743 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed; | |
1744 | ||
1745 | /* Need to have Next Protocol set for interfaces in GPE mode. */ | |
1746 | if (!gpe->np_applied) | |
1747 | return false; | |
1748 | /* "The initial version is 0. If a receiver does not support the | |
1749 | * version indicated it MUST drop the packet. | |
1750 | */ | |
1751 | if (gpe->version != 0) | |
1752 | return false; | |
1753 | /* "When the O bit is set to 1, the packet is an OAM packet and OAM | |
1754 | * processing MUST occur." However, we don't implement OAM | |
1755 | * processing, thus drop the packet. | |
1756 | */ | |
1757 | if (gpe->oam_flag) | |
1758 | return false; | |
1759 | ||
fa20e0e3 JB |
1760 | *protocol = tun_p_to_eth_p(gpe->next_protocol); |
1761 | if (!*protocol) | |
e1e5314d | 1762 | return false; |
e1e5314d JB |
1763 | |
1764 | unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS; | |
1765 | return true; | |
1766 | } | |
1767 | ||
1ab016e2 JB |
1768 | static bool vxlan_set_mac(struct vxlan_dev *vxlan, |
1769 | struct vxlan_sock *vs, | |
3ad7a4b1 | 1770 | struct sk_buff *skb, __be32 vni) |
614732ea | 1771 | { |
614732ea | 1772 | union vxlan_addr saddr; |
87613de9 | 1773 | u32 ifindex = skb->dev->ifindex; |
614732ea | 1774 | |
614732ea | 1775 | skb_reset_mac_header(skb); |
614732ea TG |
1776 | skb->protocol = eth_type_trans(skb, vxlan->dev); |
1777 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
1778 | ||
1779 | /* Ignore packet loops (and multicast echo) */ | |
1780 | if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) | |
1ab016e2 | 1781 | return false; |
614732ea | 1782 | |
760c6805 | 1783 | /* Get address from the outer IP header */ |
ce212d0f | 1784 | if (vxlan_get_sk_family(vs) == AF_INET) { |
1ab016e2 | 1785 | saddr.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; |
614732ea TG |
1786 | saddr.sa.sa_family = AF_INET; |
1787 | #if IS_ENABLED(CONFIG_IPV6) | |
1788 | } else { | |
1ab016e2 | 1789 | saddr.sin6.sin6_addr = ipv6_hdr(skb)->saddr; |
614732ea TG |
1790 | saddr.sa.sa_family = AF_INET6; |
1791 | #endif | |
1792 | } | |
1793 | ||
dc5321d7 | 1794 | if ((vxlan->cfg.flags & VXLAN_F_LEARN) && |
87613de9 | 1795 | vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni)) |
1ab016e2 JB |
1796 | return false; |
1797 | ||
1798 | return true; | |
1799 | } | |
1800 | ||
760c6805 JB |
1801 | static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph, |
1802 | struct sk_buff *skb) | |
1803 | { | |
1804 | int err = 0; | |
1805 | ||
1806 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1807 | err = IP_ECN_decapsulate(oiph, skb); | |
1808 | #if IS_ENABLED(CONFIG_IPV6) | |
1809 | else | |
1810 | err = IP6_ECN_decapsulate(oiph, skb); | |
1811 | #endif | |
1812 | ||
1813 | if (unlikely(err) && log_ecn_error) { | |
1814 | if (vxlan_get_sk_family(vs) == AF_INET) | |
1815 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
1816 | &((struct iphdr *)oiph)->saddr, | |
1817 | ((struct iphdr *)oiph)->tos); | |
1818 | else | |
1819 | net_info_ratelimited("non-ECT from %pI6\n", | |
1820 | &((struct ipv6hdr *)oiph)->saddr); | |
1821 | } | |
1822 | return err <= 1; | |
1823 | } | |
1824 | ||
d342894c | 1825 | /* Callback from net/ipv4/udp.c to receive packets */ |
f2d1968e | 1826 | static int vxlan_rcv(struct sock *sk, struct sk_buff *skb) |
d342894c | 1827 | { |
f2d1968e | 1828 | struct pcpu_sw_netstats *stats; |
c9e78efb | 1829 | struct vxlan_dev *vxlan; |
5cfccc5a | 1830 | struct vxlan_sock *vs; |
f14ecebb | 1831 | struct vxlanhdr unparsed; |
ee122c79 TG |
1832 | struct vxlan_metadata _md; |
1833 | struct vxlan_metadata *md = &_md; | |
61618eea | 1834 | __be16 protocol = htons(ETH_P_TEB); |
e1e5314d | 1835 | bool raw_proto = false; |
f2d1968e | 1836 | void *oiph; |
3ad7a4b1 | 1837 | __be32 vni = 0; |
d342894c | 1838 | |
e1e5314d | 1839 | /* Need UDP and VXLAN header to be present */ |
7ce04758 | 1840 | if (!pskb_may_pull(skb, VXLAN_HLEN)) |
e5aed006 | 1841 | goto drop; |
d342894c | 1842 | |
f14ecebb | 1843 | unparsed = *vxlan_hdr(skb); |
288b01c8 JB |
1844 | /* VNI flag always required to be set */ |
1845 | if (!(unparsed.vx_flags & VXLAN_HF_VNI)) { | |
1846 | netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n", | |
1847 | ntohl(vxlan_hdr(skb)->vx_flags), | |
1848 | ntohl(vxlan_hdr(skb)->vx_vni)); | |
1849 | /* Return non vxlan pkt */ | |
e5aed006 | 1850 | goto drop; |
d342894c | 1851 | } |
288b01c8 JB |
1852 | unparsed.vx_flags &= ~VXLAN_HF_VNI; |
1853 | unparsed.vx_vni &= ~VXLAN_VNI_MASK; | |
d342894c | 1854 | |
559835ea | 1855 | vs = rcu_dereference_sk_user_data(sk); |
5cfccc5a | 1856 | if (!vs) |
d342894c | 1857 | goto drop; |
d342894c | 1858 | |
3ad7a4b1 RP |
1859 | vni = vxlan_vni(vxlan_hdr(skb)->vx_vni); |
1860 | ||
49f810f0 | 1861 | vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni); |
c9e78efb JB |
1862 | if (!vxlan) |
1863 | goto drop; | |
1864 | ||
e1e5314d JB |
1865 | /* For backwards compatibility, only allow reserved fields to be |
1866 | * used by VXLAN extensions if explicitly requested. | |
1867 | */ | |
1868 | if (vs->flags & VXLAN_F_GPE) { | |
1869 | if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags)) | |
1870 | goto drop; | |
1871 | raw_proto = true; | |
1872 | } | |
1873 | ||
1874 | if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto, | |
1875 | !net_eq(vxlan->net, dev_net(vxlan->dev)))) | |
98c81476 | 1876 | goto drop; |
c9e78efb | 1877 | |
ee122c79 | 1878 | if (vxlan_collect_metadata(vs)) { |
10a5af23 | 1879 | struct metadata_dst *tun_dst; |
07dabf20 | 1880 | |
c29a70d2 | 1881 | tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY, |
d817f432 | 1882 | key32_to_tunnel_id(vni), sizeof(*md)); |
c29a70d2 | 1883 | |
ee122c79 TG |
1884 | if (!tun_dst) |
1885 | goto drop; | |
1886 | ||
0f1b7354 | 1887 | md = ip_tunnel_info_opts(&tun_dst->u.tun_info); |
10a5af23 JB |
1888 | |
1889 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
ee122c79 TG |
1890 | } else { |
1891 | memset(md, 0, sizeof(*md)); | |
1892 | } | |
1893 | ||
f14ecebb JB |
1894 | if (vs->flags & VXLAN_F_REMCSUM_RX) |
1895 | if (!vxlan_remcsum(&unparsed, skb, vs->flags)) | |
1896 | goto drop; | |
1897 | if (vs->flags & VXLAN_F_GBP) | |
10a5af23 | 1898 | vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md); |
e1e5314d JB |
1899 | /* Note that GBP and GPE can never be active together. This is |
1900 | * ensured in vxlan_dev_configure. | |
1901 | */ | |
3511494c | 1902 | |
f14ecebb | 1903 | if (unparsed.vx_flags || unparsed.vx_vni) { |
3bf39475 TH |
1904 | /* If there are any unprocessed flags remaining treat |
1905 | * this as a malformed packet. This behavior diverges from | |
1906 | * VXLAN RFC (RFC7348) which stipulates that bits in reserved | |
1907 | * in reserved fields are to be ignored. The approach here | |
c4b49512 | 1908 | * maintains compatibility with previous stack code, and also |
3bf39475 TH |
1909 | * is more robust and provides a little more security in |
1910 | * adding extensions to VXLAN. | |
1911 | */ | |
288b01c8 | 1912 | goto drop; |
3bf39475 TH |
1913 | } |
1914 | ||
e1e5314d | 1915 | if (!raw_proto) { |
3ad7a4b1 | 1916 | if (!vxlan_set_mac(vxlan, vs, skb, vni)) |
e1e5314d JB |
1917 | goto drop; |
1918 | } else { | |
8be0cfa4 | 1919 | skb_reset_mac_header(skb); |
e1e5314d JB |
1920 | skb->dev = vxlan->dev; |
1921 | skb->pkt_type = PACKET_HOST; | |
1922 | } | |
f2d1968e | 1923 | |
f2d1968e JB |
1924 | oiph = skb_network_header(skb); |
1925 | skb_reset_network_header(skb); | |
1926 | ||
1927 | if (!vxlan_ecn_decapsulate(vs, oiph, skb)) { | |
1928 | ++vxlan->dev->stats.rx_frame_errors; | |
1929 | ++vxlan->dev->stats.rx_errors; | |
1930 | goto drop; | |
1931 | } | |
1932 | ||
59cbf56f ED |
1933 | rcu_read_lock(); |
1934 | ||
1935 | if (unlikely(!(vxlan->dev->flags & IFF_UP))) { | |
1936 | rcu_read_unlock(); | |
1937 | atomic_long_inc(&vxlan->dev->rx_dropped); | |
1938 | goto drop; | |
1939 | } | |
1940 | ||
f2d1968e JB |
1941 | stats = this_cpu_ptr(vxlan->dev->tstats); |
1942 | u64_stats_update_begin(&stats->syncp); | |
1943 | stats->rx_packets++; | |
1944 | stats->rx_bytes += skb->len; | |
1945 | u64_stats_update_end(&stats->syncp); | |
1946 | ||
1947 | gro_cells_receive(&vxlan->gro_cells, skb); | |
59cbf56f ED |
1948 | |
1949 | rcu_read_unlock(); | |
1950 | ||
5cfccc5a PS |
1951 | return 0; |
1952 | ||
1953 | drop: | |
288b01c8 JB |
1954 | /* Consume bad packet */ |
1955 | kfree_skb(skb); | |
1956 | return 0; | |
5cfccc5a PS |
1957 | } |
1958 | ||
c3a43b9f SB |
1959 | /* Callback from net/ipv{4,6}/udp.c to check that we have a VNI for errors */ |
1960 | static int vxlan_err_lookup(struct sock *sk, struct sk_buff *skb) | |
1961 | { | |
1962 | struct vxlan_dev *vxlan; | |
1963 | struct vxlan_sock *vs; | |
1964 | struct vxlanhdr *hdr; | |
1965 | __be32 vni; | |
1966 | ||
8399a693 | 1967 | if (!pskb_may_pull(skb, skb_transport_offset(skb) + VXLAN_HLEN)) |
c3a43b9f SB |
1968 | return -EINVAL; |
1969 | ||
1970 | hdr = vxlan_hdr(skb); | |
1971 | ||
1972 | if (!(hdr->vx_flags & VXLAN_HF_VNI)) | |
1973 | return -EINVAL; | |
1974 | ||
1975 | vs = rcu_dereference_sk_user_data(sk); | |
1976 | if (!vs) | |
1977 | return -ENOENT; | |
1978 | ||
1979 | vni = vxlan_vni(hdr->vx_vni); | |
1980 | vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni); | |
1981 | if (!vxlan) | |
1982 | return -ENOENT; | |
1983 | ||
1984 | return 0; | |
1985 | } | |
1986 | ||
3ad7a4b1 | 1987 | static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
e4f67add DS |
1988 | { |
1989 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
1990 | struct arphdr *parp; | |
1991 | u8 *arpptr, *sha; | |
1992 | __be32 sip, tip; | |
1993 | struct neighbour *n; | |
1994 | ||
1995 | if (dev->flags & IFF_NOARP) | |
1996 | goto out; | |
1997 | ||
1998 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) { | |
1999 | dev->stats.tx_dropped++; | |
2000 | goto out; | |
2001 | } | |
2002 | parp = arp_hdr(skb); | |
2003 | ||
2004 | if ((parp->ar_hrd != htons(ARPHRD_ETHER) && | |
2005 | parp->ar_hrd != htons(ARPHRD_IEEE802)) || | |
2006 | parp->ar_pro != htons(ETH_P_IP) || | |
2007 | parp->ar_op != htons(ARPOP_REQUEST) || | |
2008 | parp->ar_hln != dev->addr_len || | |
2009 | parp->ar_pln != 4) | |
2010 | goto out; | |
2011 | arpptr = (u8 *)parp + sizeof(struct arphdr); | |
2012 | sha = arpptr; | |
2013 | arpptr += dev->addr_len; /* sha */ | |
2014 | memcpy(&sip, arpptr, sizeof(sip)); | |
2015 | arpptr += sizeof(sip); | |
2016 | arpptr += dev->addr_len; /* tha */ | |
2017 | memcpy(&tip, arpptr, sizeof(tip)); | |
2018 | ||
2019 | if (ipv4_is_loopback(tip) || | |
2020 | ipv4_is_multicast(tip)) | |
2021 | goto out; | |
2022 | ||
2023 | n = neigh_lookup(&arp_tbl, &tip, dev); | |
2024 | ||
2025 | if (n) { | |
e4f67add DS |
2026 | struct vxlan_fdb *f; |
2027 | struct sk_buff *reply; | |
2028 | ||
2029 | if (!(n->nud_state & NUD_CONNECTED)) { | |
2030 | neigh_release(n); | |
2031 | goto out; | |
2032 | } | |
2033 | ||
3ad7a4b1 | 2034 | f = vxlan_find_mac(vxlan, n->ha, vni); |
e4c7ed41 | 2035 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
e4f67add DS |
2036 | /* bridge-local neighbor */ |
2037 | neigh_release(n); | |
2038 | goto out; | |
2039 | } | |
2040 | ||
2041 | reply = arp_create(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha, | |
2042 | n->ha, sha); | |
2043 | ||
2044 | neigh_release(n); | |
2045 | ||
7346135d DS |
2046 | if (reply == NULL) |
2047 | goto out; | |
2048 | ||
e4f67add DS |
2049 | skb_reset_mac_header(reply); |
2050 | __skb_pull(reply, skb_network_offset(reply)); | |
2051 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
2052 | reply->pkt_type = PACKET_HOST; | |
2053 | ||
2054 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
2055 | dev->stats.rx_dropped++; | |
dc5321d7 | 2056 | } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) { |
e4c7ed41 CW |
2057 | union vxlan_addr ipa = { |
2058 | .sin.sin_addr.s_addr = tip, | |
a45e92a5 | 2059 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
2060 | }; |
2061 | ||
2062 | vxlan_ip_miss(dev, &ipa); | |
2063 | } | |
e4f67add DS |
2064 | out: |
2065 | consume_skb(skb); | |
2066 | return NETDEV_TX_OK; | |
2067 | } | |
2068 | ||
f564f45c | 2069 | #if IS_ENABLED(CONFIG_IPV6) |
4b29dba9 DS |
2070 | static struct sk_buff *vxlan_na_create(struct sk_buff *request, |
2071 | struct neighbour *n, bool isrouter) | |
2072 | { | |
2073 | struct net_device *dev = request->dev; | |
2074 | struct sk_buff *reply; | |
2075 | struct nd_msg *ns, *na; | |
2076 | struct ipv6hdr *pip6; | |
2077 | u8 *daddr; | |
2078 | int na_olen = 8; /* opt hdr + ETH_ALEN for target */ | |
2079 | int ns_olen; | |
2080 | int i, len; | |
2081 | ||
f1fb08f6 | 2082 | if (dev == NULL || !pskb_may_pull(request, request->len)) |
4b29dba9 DS |
2083 | return NULL; |
2084 | ||
2085 | len = LL_RESERVED_SPACE(dev) + sizeof(struct ipv6hdr) + | |
2086 | sizeof(*na) + na_olen + dev->needed_tailroom; | |
2087 | reply = alloc_skb(len, GFP_ATOMIC); | |
2088 | if (reply == NULL) | |
2089 | return NULL; | |
2090 | ||
2091 | reply->protocol = htons(ETH_P_IPV6); | |
2092 | reply->dev = dev; | |
2093 | skb_reserve(reply, LL_RESERVED_SPACE(request->dev)); | |
2094 | skb_push(reply, sizeof(struct ethhdr)); | |
6297b91c | 2095 | skb_reset_mac_header(reply); |
4b29dba9 | 2096 | |
f1fb08f6 | 2097 | ns = (struct nd_msg *)(ipv6_hdr(request) + 1); |
4b29dba9 DS |
2098 | |
2099 | daddr = eth_hdr(request)->h_source; | |
f1fb08f6 VB |
2100 | ns_olen = request->len - skb_network_offset(request) - |
2101 | sizeof(struct ipv6hdr) - sizeof(*ns); | |
4b29dba9 | 2102 | for (i = 0; i < ns_olen-1; i += (ns->opt[i+1]<<3)) { |
8066e6b4 IS |
2103 | if (!ns->opt[i + 1]) { |
2104 | kfree_skb(reply); | |
2105 | return NULL; | |
2106 | } | |
4b29dba9 DS |
2107 | if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) { |
2108 | daddr = ns->opt + i + sizeof(struct nd_opt_hdr); | |
2109 | break; | |
2110 | } | |
2111 | } | |
2112 | ||
2113 | /* Ethernet header */ | |
2114 | ether_addr_copy(eth_hdr(reply)->h_dest, daddr); | |
2115 | ether_addr_copy(eth_hdr(reply)->h_source, n->ha); | |
2116 | eth_hdr(reply)->h_proto = htons(ETH_P_IPV6); | |
2117 | reply->protocol = htons(ETH_P_IPV6); | |
2118 | ||
2119 | skb_pull(reply, sizeof(struct ethhdr)); | |
6297b91c | 2120 | skb_reset_network_header(reply); |
4b29dba9 DS |
2121 | skb_put(reply, sizeof(struct ipv6hdr)); |
2122 | ||
2123 | /* IPv6 header */ | |
2124 | ||
2125 | pip6 = ipv6_hdr(reply); | |
2126 | memset(pip6, 0, sizeof(struct ipv6hdr)); | |
2127 | pip6->version = 6; | |
2128 | pip6->priority = ipv6_hdr(request)->priority; | |
2129 | pip6->nexthdr = IPPROTO_ICMPV6; | |
2130 | pip6->hop_limit = 255; | |
2131 | pip6->daddr = ipv6_hdr(request)->saddr; | |
2132 | pip6->saddr = *(struct in6_addr *)n->primary_key; | |
2133 | ||
2134 | skb_pull(reply, sizeof(struct ipv6hdr)); | |
6297b91c | 2135 | skb_reset_transport_header(reply); |
4b29dba9 | 2136 | |
4b29dba9 | 2137 | /* Neighbor Advertisement */ |
b080db58 | 2138 | na = skb_put_zero(reply, sizeof(*na) + na_olen); |
4b29dba9 DS |
2139 | na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT; |
2140 | na->icmph.icmp6_router = isrouter; | |
2141 | na->icmph.icmp6_override = 1; | |
2142 | na->icmph.icmp6_solicited = 1; | |
2143 | na->target = ns->target; | |
2144 | ether_addr_copy(&na->opt[2], n->ha); | |
2145 | na->opt[0] = ND_OPT_TARGET_LL_ADDR; | |
2146 | na->opt[1] = na_olen >> 3; | |
2147 | ||
2148 | na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr, | |
2149 | &pip6->daddr, sizeof(*na)+na_olen, IPPROTO_ICMPV6, | |
2150 | csum_partial(na, sizeof(*na)+na_olen, 0)); | |
2151 | ||
2152 | pip6->payload_len = htons(sizeof(*na)+na_olen); | |
2153 | ||
2154 | skb_push(reply, sizeof(struct ipv6hdr)); | |
2155 | ||
2156 | reply->ip_summed = CHECKSUM_UNNECESSARY; | |
2157 | ||
2158 | return reply; | |
2159 | } | |
2160 | ||
3ad7a4b1 | 2161 | static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) |
f564f45c CW |
2162 | { |
2163 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
8dcd81a9 | 2164 | const struct in6_addr *daddr; |
8bff3685 | 2165 | const struct ipv6hdr *iphdr; |
4b29dba9 | 2166 | struct inet6_dev *in6_dev; |
8bff3685 XL |
2167 | struct neighbour *n; |
2168 | struct nd_msg *msg; | |
f564f45c CW |
2169 | |
2170 | in6_dev = __in6_dev_get(dev); | |
2171 | if (!in6_dev) | |
2172 | goto out; | |
2173 | ||
f564f45c | 2174 | iphdr = ipv6_hdr(skb); |
f564f45c | 2175 | daddr = &iphdr->daddr; |
f1fb08f6 | 2176 | msg = (struct nd_msg *)(iphdr + 1); |
f564f45c | 2177 | |
4b29dba9 DS |
2178 | if (ipv6_addr_loopback(daddr) || |
2179 | ipv6_addr_is_multicast(&msg->target)) | |
2180 | goto out; | |
2181 | ||
2182 | n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, dev); | |
f564f45c CW |
2183 | |
2184 | if (n) { | |
2185 | struct vxlan_fdb *f; | |
4b29dba9 | 2186 | struct sk_buff *reply; |
f564f45c CW |
2187 | |
2188 | if (!(n->nud_state & NUD_CONNECTED)) { | |
2189 | neigh_release(n); | |
2190 | goto out; | |
2191 | } | |
2192 | ||
3ad7a4b1 | 2193 | f = vxlan_find_mac(vxlan, n->ha, vni); |
f564f45c CW |
2194 | if (f && vxlan_addr_any(&(first_remote_rcu(f)->remote_ip))) { |
2195 | /* bridge-local neighbor */ | |
2196 | neigh_release(n); | |
2197 | goto out; | |
2198 | } | |
2199 | ||
4b29dba9 DS |
2200 | reply = vxlan_na_create(skb, n, |
2201 | !!(f ? f->flags & NTF_ROUTER : 0)); | |
2202 | ||
f564f45c | 2203 | neigh_release(n); |
4b29dba9 DS |
2204 | |
2205 | if (reply == NULL) | |
2206 | goto out; | |
2207 | ||
2208 | if (netif_rx_ni(reply) == NET_RX_DROP) | |
2209 | dev->stats.rx_dropped++; | |
2210 | ||
dc5321d7 | 2211 | } else if (vxlan->cfg.flags & VXLAN_F_L3MISS) { |
4b29dba9 DS |
2212 | union vxlan_addr ipa = { |
2213 | .sin6.sin6_addr = msg->target, | |
a45e92a5 | 2214 | .sin6.sin6_family = AF_INET6, |
4b29dba9 DS |
2215 | }; |
2216 | ||
f564f45c CW |
2217 | vxlan_ip_miss(dev, &ipa); |
2218 | } | |
2219 | ||
2220 | out: | |
2221 | consume_skb(skb); | |
2222 | return NETDEV_TX_OK; | |
2223 | } | |
2224 | #endif | |
2225 | ||
e4f67add DS |
2226 | static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) |
2227 | { | |
2228 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
2229 | struct neighbour *n; | |
e4f67add DS |
2230 | |
2231 | if (is_multicast_ether_addr(eth_hdr(skb)->h_dest)) | |
2232 | return false; | |
2233 | ||
2234 | n = NULL; | |
2235 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
2236 | case ETH_P_IP: | |
e15a00aa CW |
2237 | { |
2238 | struct iphdr *pip; | |
2239 | ||
e4f67add DS |
2240 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
2241 | return false; | |
2242 | pip = ip_hdr(skb); | |
2243 | n = neigh_lookup(&arp_tbl, &pip->daddr, dev); | |
dc5321d7 | 2244 | if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) { |
e4c7ed41 CW |
2245 | union vxlan_addr ipa = { |
2246 | .sin.sin_addr.s_addr = pip->daddr, | |
a45e92a5 | 2247 | .sin.sin_family = AF_INET, |
e4c7ed41 CW |
2248 | }; |
2249 | ||
2250 | vxlan_ip_miss(dev, &ipa); | |
2251 | return false; | |
2252 | } | |
2253 | ||
e4f67add | 2254 | break; |
e15a00aa CW |
2255 | } |
2256 | #if IS_ENABLED(CONFIG_IPV6) | |
2257 | case ETH_P_IPV6: | |
2258 | { | |
2259 | struct ipv6hdr *pip6; | |
2260 | ||
2261 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
2262 | return false; | |
2263 | pip6 = ipv6_hdr(skb); | |
2264 | n = neigh_lookup(ipv6_stub->nd_tbl, &pip6->daddr, dev); | |
dc5321d7 | 2265 | if (!n && (vxlan->cfg.flags & VXLAN_F_L3MISS)) { |
e15a00aa CW |
2266 | union vxlan_addr ipa = { |
2267 | .sin6.sin6_addr = pip6->daddr, | |
a45e92a5 | 2268 | .sin6.sin6_family = AF_INET6, |
e15a00aa CW |
2269 | }; |
2270 | ||
2271 | vxlan_ip_miss(dev, &ipa); | |
2272 | return false; | |
2273 | } | |
2274 | ||
2275 | break; | |
2276 | } | |
2277 | #endif | |
e4f67add DS |
2278 | default: |
2279 | return false; | |
2280 | } | |
2281 | ||
2282 | if (n) { | |
2283 | bool diff; | |
2284 | ||
7367d0b5 | 2285 | diff = !ether_addr_equal(eth_hdr(skb)->h_dest, n->ha); |
e4f67add DS |
2286 | if (diff) { |
2287 | memcpy(eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest, | |
2288 | dev->addr_len); | |
2289 | memcpy(eth_hdr(skb)->h_dest, n->ha, dev->addr_len); | |
2290 | } | |
2291 | neigh_release(n); | |
2292 | return diff; | |
e4c7ed41 CW |
2293 | } |
2294 | ||
e4f67add DS |
2295 | return false; |
2296 | } | |
2297 | ||
af33c1ad | 2298 | static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags, |
3511494c TG |
2299 | struct vxlan_metadata *md) |
2300 | { | |
2301 | struct vxlanhdr_gbp *gbp; | |
2302 | ||
db79a621 TG |
2303 | if (!md->gbp) |
2304 | return; | |
2305 | ||
3511494c | 2306 | gbp = (struct vxlanhdr_gbp *)vxh; |
54bfd872 | 2307 | vxh->vx_flags |= VXLAN_HF_GBP; |
3511494c TG |
2308 | |
2309 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
2310 | gbp->dont_learn = 1; | |
2311 | ||
2312 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
2313 | gbp->policy_applied = 1; | |
2314 | ||
2315 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
2316 | } | |
2317 | ||
e1e5314d JB |
2318 | static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags, |
2319 | __be16 protocol) | |
2320 | { | |
2321 | struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh; | |
2322 | ||
2323 | gpe->np_applied = 1; | |
fa20e0e3 JB |
2324 | gpe->next_protocol = tun_p_from_eth_p(protocol); |
2325 | if (!gpe->next_protocol) | |
2326 | return -EPFNOSUPPORT; | |
2327 | return 0; | |
e1e5314d JB |
2328 | } |
2329 | ||
f491e56d JB |
2330 | static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst, |
2331 | int iphdr_len, __be32 vni, | |
2332 | struct vxlan_metadata *md, u32 vxflags, | |
b4ed5cad | 2333 | bool udp_sum) |
e4c7ed41 | 2334 | { |
e4c7ed41 | 2335 | struct vxlanhdr *vxh; |
e4c7ed41 CW |
2336 | int min_headroom; |
2337 | int err; | |
dfd8645e | 2338 | int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
e1e5314d | 2339 | __be16 inner_protocol = htons(ETH_P_TEB); |
dfd8645e | 2340 | |
af33c1ad | 2341 | if ((vxflags & VXLAN_F_REMCSUM_TX) && |
dfd8645e TH |
2342 | skb->ip_summed == CHECKSUM_PARTIAL) { |
2343 | int csum_start = skb_checksum_start_offset(skb); | |
2344 | ||
2345 | if (csum_start <= VXLAN_MAX_REMCSUM_START && | |
2346 | !(csum_start & VXLAN_RCO_SHIFT_MASK) && | |
2347 | (skb->csum_offset == offsetof(struct udphdr, check) || | |
b5708501 | 2348 | skb->csum_offset == offsetof(struct tcphdr, check))) |
dfd8645e | 2349 | type |= SKB_GSO_TUNNEL_REMCSUM; |
dfd8645e | 2350 | } |
e4c7ed41 | 2351 | |
e4c7ed41 | 2352 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len |
4a4f86cc | 2353 | + VXLAN_HLEN + iphdr_len; |
649c5b8b PS |
2354 | |
2355 | /* Need space for new headers (invalidates iph ptr) */ | |
2356 | err = skb_cow_head(skb, min_headroom); | |
e1e5314d | 2357 | if (unlikely(err)) |
c46b7897 | 2358 | return err; |
649c5b8b | 2359 | |
aed069df AD |
2360 | err = iptunnel_handle_offloads(skb, type); |
2361 | if (err) | |
c46b7897 | 2362 | return err; |
b736a623 | 2363 | |
d58ff351 | 2364 | vxh = __skb_push(skb, sizeof(*vxh)); |
54bfd872 JB |
2365 | vxh->vx_flags = VXLAN_HF_VNI; |
2366 | vxh->vx_vni = vxlan_vni_field(vni); | |
49560532 | 2367 | |
dfd8645e | 2368 | if (type & SKB_GSO_TUNNEL_REMCSUM) { |
54bfd872 | 2369 | unsigned int start; |
dfd8645e | 2370 | |
54bfd872 JB |
2371 | start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr); |
2372 | vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset); | |
2373 | vxh->vx_flags |= VXLAN_HF_RCO; | |
dfd8645e TH |
2374 | |
2375 | if (!skb_is_gso(skb)) { | |
2376 | skb->ip_summed = CHECKSUM_NONE; | |
2377 | skb->encapsulation = 0; | |
2378 | } | |
2379 | } | |
2380 | ||
af33c1ad TH |
2381 | if (vxflags & VXLAN_F_GBP) |
2382 | vxlan_build_gbp_hdr(vxh, vxflags, md); | |
e1e5314d JB |
2383 | if (vxflags & VXLAN_F_GPE) { |
2384 | err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol); | |
2385 | if (err < 0) | |
c46b7897 | 2386 | return err; |
e1e5314d JB |
2387 | inner_protocol = skb->protocol; |
2388 | } | |
3511494c | 2389 | |
e1e5314d | 2390 | skb_set_inner_protocol(skb, inner_protocol); |
039f5062 | 2391 | return 0; |
49560532 | 2392 | } |
49560532 | 2393 | |
655c3de1 | 2394 | static struct rtable *vxlan_get_route(struct vxlan_dev *vxlan, struct net_device *dev, |
2395 | struct vxlan_sock *sock4, | |
1a8496ba | 2396 | struct sk_buff *skb, int oif, u8 tos, |
4ecb1d83 | 2397 | __be32 daddr, __be32 *saddr, __be16 dport, __be16 sport, |
0c1d70af | 2398 | struct dst_cache *dst_cache, |
db3c6139 | 2399 | const struct ip_tunnel_info *info) |
1a8496ba | 2400 | { |
db3c6139 | 2401 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
1a8496ba JB |
2402 | struct rtable *rt = NULL; |
2403 | struct flowi4 fl4; | |
2404 | ||
655c3de1 | 2405 | if (!sock4) |
2406 | return ERR_PTR(-EIO); | |
2407 | ||
db3c6139 DB |
2408 | if (tos && !info) |
2409 | use_cache = false; | |
2410 | if (use_cache) { | |
0c1d70af PA |
2411 | rt = dst_cache_get_ip4(dst_cache, saddr); |
2412 | if (rt) | |
2413 | return rt; | |
2414 | } | |
2415 | ||
1a8496ba JB |
2416 | memset(&fl4, 0, sizeof(fl4)); |
2417 | fl4.flowi4_oif = oif; | |
2418 | fl4.flowi4_tos = RT_TOS(tos); | |
2419 | fl4.flowi4_mark = skb->mark; | |
2420 | fl4.flowi4_proto = IPPROTO_UDP; | |
2421 | fl4.daddr = daddr; | |
272d96a5 | 2422 | fl4.saddr = *saddr; |
4ecb1d83 MP |
2423 | fl4.fl4_dport = dport; |
2424 | fl4.fl4_sport = sport; | |
1a8496ba JB |
2425 | |
2426 | rt = ip_route_output_key(vxlan->net, &fl4); | |
478db1f1 | 2427 | if (!IS_ERR(rt)) { |
655c3de1 | 2428 | if (rt->dst.dev == dev) { |
2429 | netdev_dbg(dev, "circular route to %pI4\n", &daddr); | |
2430 | ip_rt_put(rt); | |
2431 | return ERR_PTR(-ELOOP); | |
2432 | } | |
2433 | ||
1a8496ba | 2434 | *saddr = fl4.saddr; |
0c1d70af PA |
2435 | if (use_cache) |
2436 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); | |
655c3de1 | 2437 | } else { |
2438 | netdev_dbg(dev, "no route to %pI4\n", &daddr); | |
2439 | return ERR_PTR(-ENETUNREACH); | |
0c1d70af | 2440 | } |
1a8496ba JB |
2441 | return rt; |
2442 | } | |
2443 | ||
e5d4b29f JB |
2444 | #if IS_ENABLED(CONFIG_IPV6) |
2445 | static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan, | |
655c3de1 | 2446 | struct net_device *dev, |
03dc52a8 | 2447 | struct vxlan_sock *sock6, |
1400615d | 2448 | struct sk_buff *skb, int oif, u8 tos, |
e7f70af1 | 2449 | __be32 label, |
e5d4b29f | 2450 | const struct in6_addr *daddr, |
0c1d70af | 2451 | struct in6_addr *saddr, |
4ecb1d83 | 2452 | __be16 dport, __be16 sport, |
db3c6139 DB |
2453 | struct dst_cache *dst_cache, |
2454 | const struct ip_tunnel_info *info) | |
e5d4b29f | 2455 | { |
db3c6139 | 2456 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e5d4b29f JB |
2457 | struct dst_entry *ndst; |
2458 | struct flowi6 fl6; | |
e5d4b29f | 2459 | |
c6fcc4fc | 2460 | if (!sock6) |
2461 | return ERR_PTR(-EIO); | |
2462 | ||
1400615d DB |
2463 | if (tos && !info) |
2464 | use_cache = false; | |
db3c6139 | 2465 | if (use_cache) { |
0c1d70af PA |
2466 | ndst = dst_cache_get_ip6(dst_cache, saddr); |
2467 | if (ndst) | |
2468 | return ndst; | |
2469 | } | |
2470 | ||
e5d4b29f JB |
2471 | memset(&fl6, 0, sizeof(fl6)); |
2472 | fl6.flowi6_oif = oif; | |
2473 | fl6.daddr = *daddr; | |
272d96a5 | 2474 | fl6.saddr = *saddr; |
eaa93bf4 | 2475 | fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label); |
e5d4b29f JB |
2476 | fl6.flowi6_mark = skb->mark; |
2477 | fl6.flowi6_proto = IPPROTO_UDP; | |
4ecb1d83 MP |
2478 | fl6.fl6_dport = dport; |
2479 | fl6.fl6_sport = sport; | |
e5d4b29f | 2480 | |
6c8991f4 SD |
2481 | ndst = ipv6_stub->ipv6_dst_lookup_flow(vxlan->net, sock6->sock->sk, |
2482 | &fl6, NULL); | |
2483 | if (unlikely(IS_ERR(ndst))) { | |
655c3de1 | 2484 | netdev_dbg(dev, "no route to %pI6\n", daddr); |
2485 | return ERR_PTR(-ENETUNREACH); | |
2486 | } | |
2487 | ||
2488 | if (unlikely(ndst->dev == dev)) { | |
2489 | netdev_dbg(dev, "circular route to %pI6\n", daddr); | |
2490 | dst_release(ndst); | |
2491 | return ERR_PTR(-ELOOP); | |
2492 | } | |
e5d4b29f JB |
2493 | |
2494 | *saddr = fl6.saddr; | |
db3c6139 | 2495 | if (use_cache) |
0c1d70af | 2496 | dst_cache_set_ip6(dst_cache, ndst, saddr); |
e5d4b29f JB |
2497 | return ndst; |
2498 | } | |
2499 | #endif | |
2500 | ||
9dcc71e1 SS |
2501 | /* Bypass encapsulation if the destination is local */ |
2502 | static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, | |
fc68c995 SB |
2503 | struct vxlan_dev *dst_vxlan, __be32 vni, |
2504 | bool snoop) | |
9dcc71e1 | 2505 | { |
8f84985f | 2506 | struct pcpu_sw_netstats *tx_stats, *rx_stats; |
e4c7ed41 CW |
2507 | union vxlan_addr loopback; |
2508 | union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip; | |
4179cb5a | 2509 | struct net_device *dev; |
ce6502a8 | 2510 | int len = skb->len; |
9dcc71e1 | 2511 | |
8f84985f LR |
2512 | tx_stats = this_cpu_ptr(src_vxlan->dev->tstats); |
2513 | rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats); | |
9dcc71e1 SS |
2514 | skb->pkt_type = PACKET_HOST; |
2515 | skb->encapsulation = 0; | |
2516 | skb->dev = dst_vxlan->dev; | |
2517 | __skb_pull(skb, skb_network_offset(skb)); | |
2518 | ||
e4c7ed41 CW |
2519 | if (remote_ip->sa.sa_family == AF_INET) { |
2520 | loopback.sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
2521 | loopback.sa.sa_family = AF_INET; | |
2522 | #if IS_ENABLED(CONFIG_IPV6) | |
2523 | } else { | |
2524 | loopback.sin6.sin6_addr = in6addr_loopback; | |
2525 | loopback.sa.sa_family = AF_INET6; | |
2526 | #endif | |
2527 | } | |
2528 | ||
4179cb5a ED |
2529 | rcu_read_lock(); |
2530 | dev = skb->dev; | |
2531 | if (unlikely(!(dev->flags & IFF_UP))) { | |
2532 | kfree_skb(skb); | |
2533 | goto drop; | |
2534 | } | |
2535 | ||
fc68c995 | 2536 | if ((dst_vxlan->cfg.flags & VXLAN_F_LEARN) && snoop) |
4179cb5a | 2537 | vxlan_snoop(dev, &loopback, eth_hdr(skb)->h_source, 0, vni); |
9dcc71e1 SS |
2538 | |
2539 | u64_stats_update_begin(&tx_stats->syncp); | |
2540 | tx_stats->tx_packets++; | |
ce6502a8 | 2541 | tx_stats->tx_bytes += len; |
9dcc71e1 SS |
2542 | u64_stats_update_end(&tx_stats->syncp); |
2543 | ||
2544 | if (netif_rx(skb) == NET_RX_SUCCESS) { | |
2545 | u64_stats_update_begin(&rx_stats->syncp); | |
2546 | rx_stats->rx_packets++; | |
ce6502a8 | 2547 | rx_stats->rx_bytes += len; |
9dcc71e1 SS |
2548 | u64_stats_update_end(&rx_stats->syncp); |
2549 | } else { | |
4179cb5a | 2550 | drop: |
ce6502a8 | 2551 | dev->stats.rx_dropped++; |
9dcc71e1 | 2552 | } |
4179cb5a | 2553 | rcu_read_unlock(); |
9dcc71e1 SS |
2554 | } |
2555 | ||
fee1fad7 | 2556 | static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev, |
49f810f0 MS |
2557 | struct vxlan_dev *vxlan, |
2558 | union vxlan_addr *daddr, | |
2559 | __be16 dst_port, int dst_ifindex, __be32 vni, | |
2560 | struct dst_entry *dst, | |
fee1fad7 | 2561 | u32 rt_flags) |
2562 | { | |
2563 | #if IS_ENABLED(CONFIG_IPV6) | |
2564 | /* IPv6 rt-flags are checked against RTF_LOCAL, but the value of | |
2565 | * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple | |
2566 | * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry. | |
2567 | */ | |
2568 | BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL); | |
2569 | #endif | |
2570 | /* Bypass encapsulation if the destination is local */ | |
2571 | if (rt_flags & RTCF_LOCAL && | |
2572 | !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) { | |
2573 | struct vxlan_dev *dst_vxlan; | |
2574 | ||
2575 | dst_release(dst); | |
49f810f0 | 2576 | dst_vxlan = vxlan_find_vni(vxlan->net, dst_ifindex, vni, |
fee1fad7 | 2577 | daddr->sa.sa_family, dst_port, |
dc5321d7 | 2578 | vxlan->cfg.flags); |
fee1fad7 | 2579 | if (!dst_vxlan) { |
2580 | dev->stats.tx_errors++; | |
2581 | kfree_skb(skb); | |
2582 | ||
2583 | return -ENOENT; | |
2584 | } | |
fc68c995 | 2585 | vxlan_encap_bypass(skb, vxlan, dst_vxlan, vni, true); |
fee1fad7 | 2586 | return 1; |
2587 | } | |
2588 | ||
2589 | return 0; | |
2590 | } | |
2591 | ||
4ad16930 | 2592 | static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, |
3ad7a4b1 RP |
2593 | __be32 default_vni, struct vxlan_rdst *rdst, |
2594 | bool did_rsc) | |
d342894c | 2595 | { |
d71785ff | 2596 | struct dst_cache *dst_cache; |
3093fbe7 | 2597 | struct ip_tunnel_info *info; |
d342894c | 2598 | struct vxlan_dev *vxlan = netdev_priv(dev); |
0770b53b | 2599 | const struct iphdr *old_iph = ip_hdr(skb); |
e4c7ed41 | 2600 | union vxlan_addr *dst; |
272d96a5 | 2601 | union vxlan_addr remote_ip, local_ip; |
ee122c79 TG |
2602 | struct vxlan_metadata _md; |
2603 | struct vxlan_metadata *md = &_md; | |
e4c7ed41 | 2604 | __be16 src_port = 0, dst_port; |
655c3de1 | 2605 | struct dst_entry *ndst = NULL; |
e7f70af1 | 2606 | __be32 vni, label; |
d342894c | 2607 | __u8 tos, ttl; |
49f810f0 | 2608 | int ifindex; |
0e6fbc5b | 2609 | int err; |
dc5321d7 | 2610 | u32 flags = vxlan->cfg.flags; |
b4ed5cad | 2611 | bool udp_sum = false; |
f491e56d | 2612 | bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev)); |
d342894c | 2613 | |
61adedf3 | 2614 | info = skb_tunnel_info(skb); |
3093fbe7 | 2615 | |
ee122c79 | 2616 | if (rdst) { |
0770b53b | 2617 | dst = &rdst->remote_ip; |
2618 | if (vxlan_addr_any(dst)) { | |
2619 | if (did_rsc) { | |
2620 | /* short-circuited back to local bridge */ | |
fc68c995 SB |
2621 | vxlan_encap_bypass(skb, vxlan, vxlan, |
2622 | default_vni, true); | |
0770b53b | 2623 | return; |
2624 | } | |
2625 | goto drop; | |
2626 | } | |
2627 | ||
0dfbdf41 | 2628 | dst_port = rdst->remote_port ? rdst->remote_port : vxlan->cfg.dst_port; |
3ad7a4b1 | 2629 | vni = (rdst->remote_vni) ? : default_vni; |
49f810f0 | 2630 | ifindex = rdst->remote_ifindex; |
1158632b | 2631 | local_ip = vxlan->cfg.saddr; |
d71785ff | 2632 | dst_cache = &rdst->dst_cache; |
0770b53b | 2633 | md->gbp = skb->mark; |
72f6d71e HL |
2634 | if (flags & VXLAN_F_TTL_INHERIT) { |
2635 | ttl = ip_tunnel_get_ttl(old_iph, skb); | |
2636 | } else { | |
2637 | ttl = vxlan->cfg.ttl; | |
2638 | if (!ttl && vxlan_addr_multicast(dst)) | |
2639 | ttl = 1; | |
2640 | } | |
0770b53b | 2641 | |
2642 | tos = vxlan->cfg.tos; | |
2643 | if (tos == 1) | |
2644 | tos = ip_tunnel_get_dsfield(old_iph, skb); | |
2645 | ||
2646 | if (dst->sa.sa_family == AF_INET) | |
2647 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX); | |
2648 | else | |
2649 | udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); | |
2650 | label = vxlan->cfg.label; | |
ee122c79 TG |
2651 | } else { |
2652 | if (!info) { | |
2653 | WARN_ONCE(1, "%s: Missing encapsulation instructions\n", | |
2654 | dev->name); | |
2655 | goto drop; | |
2656 | } | |
b1be00a6 | 2657 | remote_ip.sa.sa_family = ip_tunnel_info_af(info); |
272d96a5 | 2658 | if (remote_ip.sa.sa_family == AF_INET) { |
a725e514 | 2659 | remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst; |
272d96a5 | 2660 | local_ip.sin.sin_addr.s_addr = info->key.u.ipv4.src; |
2661 | } else { | |
a725e514 | 2662 | remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst; |
272d96a5 | 2663 | local_ip.sin6.sin6_addr = info->key.u.ipv6.src; |
2664 | } | |
ee122c79 | 2665 | dst = &remote_ip; |
0770b53b | 2666 | dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port; |
2667 | vni = tunnel_id_to_key32(info->key.tun_id); | |
49f810f0 | 2668 | ifindex = 0; |
d71785ff | 2669 | dst_cache = &info->dst_cache; |
eadf52cf XL |
2670 | if (info->key.tun_flags & TUNNEL_VXLAN_OPT) { |
2671 | if (info->options_len < sizeof(*md)) | |
2672 | goto drop; | |
0770b53b | 2673 | md = ip_tunnel_info_opts(info); |
eadf52cf | 2674 | } |
a725e514 JB |
2675 | ttl = info->key.ttl; |
2676 | tos = info->key.tos; | |
e7f70af1 | 2677 | label = info->key.label; |
b4ed5cad | 2678 | udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
a725e514 | 2679 | } |
0770b53b | 2680 | src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, |
2681 | vxlan->cfg.port_max, true); | |
a725e514 | 2682 | |
56de859e | 2683 | rcu_read_lock(); |
e4c7ed41 | 2684 | if (dst->sa.sa_family == AF_INET) { |
c6fcc4fc | 2685 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
c46b7897 | 2686 | struct rtable *rt; |
0770b53b | 2687 | __be16 df = 0; |
c6fcc4fc | 2688 | |
aab8cc36 AB |
2689 | if (!ifindex) |
2690 | ifindex = sock4->sock->sk->sk_bound_dev_if; | |
2691 | ||
49f810f0 | 2692 | rt = vxlan_get_route(vxlan, dev, sock4, skb, ifindex, tos, |
272d96a5 | 2693 | dst->sin.sin_addr.s_addr, |
1158632b | 2694 | &local_ip.sin.sin_addr.s_addr, |
4ecb1d83 | 2695 | dst_port, src_port, |
d71785ff | 2696 | dst_cache, info); |
8ebd115b DM |
2697 | if (IS_ERR(rt)) { |
2698 | err = PTR_ERR(rt); | |
c46b7897 | 2699 | goto tx_error; |
8ebd115b | 2700 | } |
e4c7ed41 | 2701 | |
fee1fad7 | 2702 | if (!info) { |
b4d30697 | 2703 | /* Bypass encapsulation if the destination is local */ |
fee1fad7 | 2704 | err = encap_bypass_if_local(skb, dev, vxlan, dst, |
49f810f0 MS |
2705 | dst_port, ifindex, vni, |
2706 | &rt->dst, rt->rt_flags); | |
fee1fad7 | 2707 | if (err) |
56de859e | 2708 | goto out_unlock; |
b4d30697 SB |
2709 | |
2710 | if (vxlan->cfg.df == VXLAN_DF_SET) { | |
2711 | df = htons(IP_DF); | |
2712 | } else if (vxlan->cfg.df == VXLAN_DF_INHERIT) { | |
2713 | struct ethhdr *eth = eth_hdr(skb); | |
2714 | ||
2715 | if (ntohs(eth->h_proto) == ETH_P_IPV6 || | |
2716 | (ntohs(eth->h_proto) == ETH_P_IP && | |
2717 | old_iph->frag_off & htons(IP_DF))) | |
2718 | df = htons(IP_DF); | |
2719 | } | |
fee1fad7 | 2720 | } else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) { |
6ceb31ca | 2721 | df = htons(IP_DF); |
fee1fad7 | 2722 | } |
6ceb31ca | 2723 | |
c46b7897 | 2724 | ndst = &rt->dst; |
fc68c995 SB |
2725 | err = skb_tunnel_check_pmtu(skb, ndst, VXLAN_HEADROOM, |
2726 | netif_is_any_bridge_port(dev)); | |
2727 | if (err < 0) { | |
2728 | goto tx_error; | |
2729 | } else if (err) { | |
2730 | if (info) { | |
2731 | struct in_addr src, dst; | |
2732 | ||
2733 | src = remote_ip.sin.sin_addr; | |
2734 | dst = local_ip.sin.sin_addr; | |
2735 | info->key.u.ipv4.src = src.s_addr; | |
2736 | info->key.u.ipv4.dst = dst.s_addr; | |
2737 | } | |
2738 | vxlan_encap_bypass(skb, vxlan, vxlan, vni, false); | |
2739 | dst_release(ndst); | |
2740 | goto out_unlock; | |
2741 | } | |
a93bf0ff | 2742 | |
a0dced17 | 2743 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
e4c7ed41 | 2744 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); |
c46b7897 | 2745 | err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr), |
54bfd872 | 2746 | vni, md, flags, udp_sum); |
f491e56d | 2747 | if (err < 0) |
c46b7897 | 2748 | goto tx_error; |
f491e56d | 2749 | |
1158632b | 2750 | udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, local_ip.sin.sin_addr.s_addr, |
f491e56d JB |
2751 | dst->sin.sin_addr.s_addr, tos, ttl, df, |
2752 | src_port, dst_port, xnet, !udp_sum); | |
e4c7ed41 CW |
2753 | #if IS_ENABLED(CONFIG_IPV6) |
2754 | } else { | |
c6fcc4fc | 2755 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
e4c7ed41 | 2756 | |
aab8cc36 AB |
2757 | if (!ifindex) |
2758 | ifindex = sock6->sock->sk->sk_bound_dev_if; | |
2759 | ||
49f810f0 | 2760 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, ifindex, tos, |
272d96a5 | 2761 | label, &dst->sin6.sin6_addr, |
1158632b | 2762 | &local_ip.sin6.sin6_addr, |
4ecb1d83 | 2763 | dst_port, src_port, |
db3c6139 | 2764 | dst_cache, info); |
e5d4b29f | 2765 | if (IS_ERR(ndst)) { |
8ebd115b | 2766 | err = PTR_ERR(ndst); |
c46b7897 | 2767 | ndst = NULL; |
9dcc71e1 | 2768 | goto tx_error; |
e4c7ed41 | 2769 | } |
655c3de1 | 2770 | |
fee1fad7 | 2771 | if (!info) { |
2772 | u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags; | |
49560532 | 2773 | |
fee1fad7 | 2774 | err = encap_bypass_if_local(skb, dev, vxlan, dst, |
49f810f0 MS |
2775 | dst_port, ifindex, vni, |
2776 | ndst, rt6i_flags); | |
fee1fad7 | 2777 | if (err) |
56de859e | 2778 | goto out_unlock; |
fee1fad7 | 2779 | } |
35e2d115 | 2780 | |
fc68c995 SB |
2781 | err = skb_tunnel_check_pmtu(skb, ndst, VXLAN6_HEADROOM, |
2782 | netif_is_any_bridge_port(dev)); | |
2783 | if (err < 0) { | |
2784 | goto tx_error; | |
2785 | } else if (err) { | |
2786 | if (info) { | |
2787 | struct in6_addr src, dst; | |
2788 | ||
2789 | src = remote_ip.sin6.sin6_addr; | |
2790 | dst = local_ip.sin6.sin6_addr; | |
2791 | info->key.u.ipv6.src = src; | |
2792 | info->key.u.ipv6.dst = dst; | |
2793 | } | |
2794 | ||
2795 | vxlan_encap_bypass(skb, vxlan, vxlan, vni, false); | |
2796 | dst_release(ndst); | |
2797 | goto out_unlock; | |
2798 | } | |
a93bf0ff | 2799 | |
a0dced17 | 2800 | tos = ip_tunnel_ecn_encap(tos, old_iph, skb); |
e4c7ed41 | 2801 | ttl = ttl ? : ip6_dst_hoplimit(ndst); |
f491e56d JB |
2802 | skb_scrub_packet(skb, xnet); |
2803 | err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr), | |
54bfd872 | 2804 | vni, md, flags, udp_sum); |
c46b7897 | 2805 | if (err < 0) |
2806 | goto tx_error; | |
2807 | ||
0770b53b | 2808 | udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev, |
1158632b | 2809 | &local_ip.sin6.sin6_addr, |
272d96a5 | 2810 | &dst->sin6.sin6_addr, tos, ttl, |
e7f70af1 | 2811 | label, src_port, dst_port, !udp_sum); |
e4c7ed41 CW |
2812 | #endif |
2813 | } | |
56de859e JK |
2814 | out_unlock: |
2815 | rcu_read_unlock(); | |
4ad16930 | 2816 | return; |
d342894c | 2817 | |
2818 | drop: | |
2819 | dev->stats.tx_dropped++; | |
c46b7897 | 2820 | dev_kfree_skb(skb); |
2821 | return; | |
d342894c | 2822 | |
2823 | tx_error: | |
56de859e | 2824 | rcu_read_unlock(); |
655c3de1 | 2825 | if (err == -ELOOP) |
2826 | dev->stats.collisions++; | |
2827 | else if (err == -ENETUNREACH) | |
2828 | dev->stats.tx_carrier_errors++; | |
c46b7897 | 2829 | dst_release(ndst); |
d342894c | 2830 | dev->stats.tx_errors++; |
c46b7897 | 2831 | kfree_skb(skb); |
d342894c | 2832 | } |
2833 | ||
1274e1cc RP |
2834 | static void vxlan_xmit_nh(struct sk_buff *skb, struct net_device *dev, |
2835 | struct vxlan_fdb *f, __be32 vni, bool did_rsc) | |
2836 | { | |
2837 | struct vxlan_rdst nh_rdst; | |
2838 | struct nexthop *nh; | |
2839 | bool do_xmit; | |
2840 | u32 hash; | |
2841 | ||
2842 | memset(&nh_rdst, 0, sizeof(struct vxlan_rdst)); | |
2843 | hash = skb_get_hash(skb); | |
2844 | ||
2845 | rcu_read_lock(); | |
2846 | nh = rcu_dereference(f->nh); | |
2847 | if (!nh) { | |
2848 | rcu_read_unlock(); | |
2849 | goto drop; | |
2850 | } | |
2851 | do_xmit = vxlan_fdb_nh_path_select(nh, hash, &nh_rdst); | |
2852 | rcu_read_unlock(); | |
2853 | ||
2854 | if (likely(do_xmit)) | |
2855 | vxlan_xmit_one(skb, dev, vni, &nh_rdst, did_rsc); | |
2856 | else | |
2857 | goto drop; | |
2858 | ||
2859 | return; | |
2860 | ||
2861 | drop: | |
2862 | dev->stats.tx_dropped++; | |
2863 | dev_kfree_skb(skb); | |
2864 | } | |
2865 | ||
6681712d DS |
2866 | /* Transmit local packets over Vxlan |
2867 | * | |
2868 | * Outer IP header inherits ECN and DF from inner header. | |
2869 | * Outer UDP destination is the VXLAN assigned port. | |
2870 | * source port is based on hash of flow | |
2871 | */ | |
2872 | static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) | |
2873 | { | |
2874 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
8bff3685 | 2875 | struct vxlan_rdst *rdst, *fdst = NULL; |
3093fbe7 | 2876 | const struct ip_tunnel_info *info; |
6681712d | 2877 | bool did_rsc = false; |
6681712d | 2878 | struct vxlan_fdb *f; |
8bff3685 | 2879 | struct ethhdr *eth; |
3ad7a4b1 | 2880 | __be32 vni = 0; |
6681712d | 2881 | |
61adedf3 | 2882 | info = skb_tunnel_info(skb); |
3093fbe7 | 2883 | |
6681712d | 2884 | skb_reset_mac_header(skb); |
6681712d | 2885 | |
dc5321d7 | 2886 | if (vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) { |
3ad7a4b1 RP |
2887 | if (info && info->mode & IP_TUNNEL_INFO_BRIDGE && |
2888 | info->mode & IP_TUNNEL_INFO_TX) { | |
2889 | vni = tunnel_id_to_key32(info->key.tun_id); | |
2890 | } else { | |
2891 | if (info && info->mode & IP_TUNNEL_INFO_TX) | |
2892 | vxlan_xmit_one(skb, dev, vni, NULL, false); | |
2893 | else | |
2894 | kfree_skb(skb); | |
2895 | return NETDEV_TX_OK; | |
2896 | } | |
47e5d1b0 JB |
2897 | } |
2898 | ||
dc5321d7 | 2899 | if (vxlan->cfg.flags & VXLAN_F_PROXY) { |
47e5d1b0 | 2900 | eth = eth_hdr(skb); |
f564f45c | 2901 | if (ntohs(eth->h_proto) == ETH_P_ARP) |
3ad7a4b1 | 2902 | return arp_reduce(dev, skb, vni); |
f564f45c | 2903 | #if IS_ENABLED(CONFIG_IPV6) |
8bff3685 XL |
2904 | else if (ntohs(eth->h_proto) == ETH_P_IPV6 && |
2905 | pskb_may_pull(skb, sizeof(struct ipv6hdr) + | |
2906 | sizeof(struct nd_msg)) && | |
2907 | ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { | |
2908 | struct nd_msg *m = (struct nd_msg *)(ipv6_hdr(skb) + 1); | |
2909 | ||
2910 | if (m->icmph.icmp6_code == 0 && | |
2911 | m->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
f1fb08f6 | 2912 | return neigh_reduce(dev, skb, vni); |
f564f45c CW |
2913 | } |
2914 | #endif | |
2915 | } | |
6681712d | 2916 | |
47e5d1b0 | 2917 | eth = eth_hdr(skb); |
3ad7a4b1 | 2918 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2919 | did_rsc = false; |
2920 | ||
dc5321d7 | 2921 | if (f && (f->flags & NTF_ROUTER) && (vxlan->cfg.flags & VXLAN_F_RSC) && |
e15a00aa CW |
2922 | (ntohs(eth->h_proto) == ETH_P_IP || |
2923 | ntohs(eth->h_proto) == ETH_P_IPV6)) { | |
ae884082 DS |
2924 | did_rsc = route_shortcircuit(dev, skb); |
2925 | if (did_rsc) | |
3ad7a4b1 | 2926 | f = vxlan_find_mac(vxlan, eth->h_dest, vni); |
ae884082 DS |
2927 | } |
2928 | ||
6681712d | 2929 | if (f == NULL) { |
3ad7a4b1 | 2930 | f = vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae | 2931 | if (f == NULL) { |
dc5321d7 | 2932 | if ((vxlan->cfg.flags & VXLAN_F_L2MISS) && |
afbd8bae MR |
2933 | !is_multicast_ether_addr(eth->h_dest)) |
2934 | vxlan_fdb_miss(vxlan, eth->h_dest); | |
2935 | ||
2936 | dev->stats.tx_dropped++; | |
8f646c92 | 2937 | kfree_skb(skb); |
afbd8bae MR |
2938 | return NETDEV_TX_OK; |
2939 | } | |
2940 | } | |
6681712d | 2941 | |
1274e1cc RP |
2942 | if (rcu_access_pointer(f->nh)) { |
2943 | vxlan_xmit_nh(skb, dev, f, | |
2944 | (vni ? : vxlan->default_dst.remote_vni), did_rsc); | |
2945 | } else { | |
2946 | list_for_each_entry_rcu(rdst, &f->remotes, list) { | |
2947 | struct sk_buff *skb1; | |
6681712d | 2948 | |
1274e1cc RP |
2949 | if (!fdst) { |
2950 | fdst = rdst; | |
2951 | continue; | |
2952 | } | |
2953 | skb1 = skb_clone(skb, GFP_ATOMIC); | |
2954 | if (skb1) | |
2955 | vxlan_xmit_one(skb1, dev, vni, rdst, did_rsc); | |
8f646c92 | 2956 | } |
1274e1cc RP |
2957 | if (fdst) |
2958 | vxlan_xmit_one(skb, dev, vni, fdst, did_rsc); | |
2959 | else | |
2960 | kfree_skb(skb); | |
6681712d DS |
2961 | } |
2962 | ||
4ad16930 | 2963 | return NETDEV_TX_OK; |
6681712d DS |
2964 | } |
2965 | ||
d342894c | 2966 | /* Walk the forwarding table and purge stale entries */ |
df7e828c | 2967 | static void vxlan_cleanup(struct timer_list *t) |
d342894c | 2968 | { |
df7e828c | 2969 | struct vxlan_dev *vxlan = from_timer(vxlan, t, age_timer); |
d342894c | 2970 | unsigned long next_timer = jiffies + FDB_AGE_INTERVAL; |
2971 | unsigned int h; | |
2972 | ||
2973 | if (!netif_running(vxlan->dev)) | |
2974 | return; | |
2975 | ||
d342894c | 2976 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
2977 | struct hlist_node *p, *n; | |
14e1d0fa | 2978 | |
fe1e0713 | 2979 | spin_lock(&vxlan->hash_lock[h]); |
d342894c | 2980 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
2981 | struct vxlan_fdb *f | |
2982 | = container_of(p, struct vxlan_fdb, hlist); | |
2983 | unsigned long timeout; | |
2984 | ||
efb5f68f | 2985 | if (f->state & (NUD_PERMANENT | NUD_NOARP)) |
d342894c | 2986 | continue; |
2987 | ||
def499c9 RP |
2988 | if (f->flags & NTF_EXT_LEARNED) |
2989 | continue; | |
2990 | ||
0dfbdf41 | 2991 | timeout = f->used + vxlan->cfg.age_interval * HZ; |
d342894c | 2992 | if (time_before_eq(timeout, jiffies)) { |
2993 | netdev_dbg(vxlan->dev, | |
2994 | "garbage collect %pM\n", | |
2995 | f->eth_addr); | |
2996 | f->state = NUD_STALE; | |
0e6160f3 | 2997 | vxlan_fdb_destroy(vxlan, f, true, true); |
d342894c | 2998 | } else if (time_before(timeout, next_timer)) |
2999 | next_timer = timeout; | |
3000 | } | |
fe1e0713 | 3001 | spin_unlock(&vxlan->hash_lock[h]); |
d342894c | 3002 | } |
d342894c | 3003 | |
3004 | mod_timer(&vxlan->age_timer, next_timer); | |
3005 | } | |
3006 | ||
a53cb29b MB |
3007 | static void vxlan_vs_del_dev(struct vxlan_dev *vxlan) |
3008 | { | |
3009 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); | |
3010 | ||
3011 | spin_lock(&vn->sock_lock); | |
69e76661 JB |
3012 | hlist_del_init_rcu(&vxlan->hlist4.hlist); |
3013 | #if IS_ENABLED(CONFIG_IPV6) | |
3014 | hlist_del_init_rcu(&vxlan->hlist6.hlist); | |
3015 | #endif | |
a53cb29b MB |
3016 | spin_unlock(&vn->sock_lock); |
3017 | } | |
3018 | ||
69e76661 JB |
3019 | static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan, |
3020 | struct vxlan_dev_node *node) | |
9c2e24e1 | 3021 | { |
56ef9c90 | 3022 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
54bfd872 | 3023 | __be32 vni = vxlan->default_dst.remote_vni; |
9c2e24e1 | 3024 | |
69e76661 | 3025 | node->vxlan = vxlan; |
56ef9c90 | 3026 | spin_lock(&vn->sock_lock); |
69e76661 | 3027 | hlist_add_head_rcu(&node->hlist, vni_head(vs, vni)); |
56ef9c90 | 3028 | spin_unlock(&vn->sock_lock); |
9c2e24e1 PS |
3029 | } |
3030 | ||
d342894c | 3031 | /* Setup stats when device is created */ |
3032 | static int vxlan_init(struct net_device *dev) | |
3033 | { | |
384d91c2 TY |
3034 | struct vxlan_dev *vxlan = netdev_priv(dev); |
3035 | int err; | |
3036 | ||
1c213bd2 | 3037 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
e8171045 | 3038 | if (!dev->tstats) |
d342894c | 3039 | return -ENOMEM; |
3040 | ||
384d91c2 TY |
3041 | err = gro_cells_init(&vxlan->gro_cells, dev); |
3042 | if (err) { | |
3043 | free_percpu(dev->tstats); | |
3044 | return err; | |
3045 | } | |
3046 | ||
d342894c | 3047 | return 0; |
3048 | } | |
3049 | ||
3ad7a4b1 | 3050 | static void vxlan_fdb_delete_default(struct vxlan_dev *vxlan, __be32 vni) |
afbd8bae MR |
3051 | { |
3052 | struct vxlan_fdb *f; | |
fe1e0713 | 3053 | u32 hash_index = fdb_head_index(vxlan, all_zeros_mac, vni); |
afbd8bae | 3054 | |
fe1e0713 | 3055 | spin_lock_bh(&vxlan->hash_lock[hash_index]); |
3ad7a4b1 | 3056 | f = __vxlan_find_mac(vxlan, all_zeros_mac, vni); |
afbd8bae | 3057 | if (f) |
0e6160f3 | 3058 | vxlan_fdb_destroy(vxlan, f, true, true); |
fe1e0713 | 3059 | spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
afbd8bae MR |
3060 | } |
3061 | ||
ebf4063e SH |
3062 | static void vxlan_uninit(struct net_device *dev) |
3063 | { | |
3064 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
ebf4063e | 3065 | |
ad6c9986 SB |
3066 | gro_cells_destroy(&vxlan->gro_cells); |
3067 | ||
3ad7a4b1 | 3068 | vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni); |
afbd8bae | 3069 | |
ebf4063e SH |
3070 | free_percpu(dev->tstats); |
3071 | } | |
3072 | ||
d342894c | 3073 | /* Start ageing timer and join group when device is brought up */ |
3074 | static int vxlan_open(struct net_device *dev) | |
3075 | { | |
3076 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
205f356d | 3077 | int ret; |
56ef9c90 | 3078 | |
205f356d JB |
3079 | ret = vxlan_sock_add(vxlan); |
3080 | if (ret < 0) | |
3081 | return ret; | |
d342894c | 3082 | |
79d4a94f | 3083 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip)) { |
56ef9c90 | 3084 | ret = vxlan_igmp_join(vxlan); |
bef0057b MRL |
3085 | if (ret == -EADDRINUSE) |
3086 | ret = 0; | |
56ef9c90 | 3087 | if (ret) { |
205f356d | 3088 | vxlan_sock_release(vxlan); |
56ef9c90 MRL |
3089 | return ret; |
3090 | } | |
d342894c | 3091 | } |
3092 | ||
0dfbdf41 | 3093 | if (vxlan->cfg.age_interval) |
d342894c | 3094 | mod_timer(&vxlan->age_timer, jiffies + FDB_AGE_INTERVAL); |
3095 | ||
56ef9c90 | 3096 | return ret; |
d342894c | 3097 | } |
3098 | ||
3099 | /* Purge the forwarding table */ | |
8b3f9337 | 3100 | static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all) |
d342894c | 3101 | { |
31fec5aa | 3102 | unsigned int h; |
d342894c | 3103 | |
d342894c | 3104 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
3105 | struct hlist_node *p, *n; | |
fe1e0713 L |
3106 | |
3107 | spin_lock_bh(&vxlan->hash_lock[h]); | |
d342894c | 3108 | hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) { |
3109 | struct vxlan_fdb *f | |
3110 | = container_of(p, struct vxlan_fdb, hlist); | |
8b3f9337 RP |
3111 | if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP))) |
3112 | continue; | |
afbd8bae | 3113 | /* the all_zeros_mac entry is deleted at vxlan_uninit */ |
fda2ec62 TY |
3114 | if (is_zero_ether_addr(f->eth_addr) && |
3115 | f->vni == vxlan->cfg.vni) | |
3116 | continue; | |
3117 | vxlan_fdb_destroy(vxlan, f, true, true); | |
d342894c | 3118 | } |
fe1e0713 | 3119 | spin_unlock_bh(&vxlan->hash_lock[h]); |
d342894c | 3120 | } |
d342894c | 3121 | } |
3122 | ||
3123 | /* Cleanup timer and forwarding table on shutdown */ | |
3124 | static int vxlan_stop(struct net_device *dev) | |
3125 | { | |
3126 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
f01ec1c0 | 3127 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
56ef9c90 | 3128 | int ret = 0; |
d342894c | 3129 | |
24c0e683 | 3130 | if (vxlan_addr_multicast(&vxlan->default_dst.remote_ip) && |
f13b1689 | 3131 | !vxlan_group_used(vn, vxlan)) |
56ef9c90 | 3132 | ret = vxlan_igmp_leave(vxlan); |
d342894c | 3133 | |
3134 | del_timer_sync(&vxlan->age_timer); | |
3135 | ||
8b3f9337 | 3136 | vxlan_flush(vxlan, false); |
205f356d | 3137 | vxlan_sock_release(vxlan); |
d342894c | 3138 | |
56ef9c90 | 3139 | return ret; |
d342894c | 3140 | } |
3141 | ||
d342894c | 3142 | /* Stub, nothing needs to be done. */ |
3143 | static void vxlan_set_multicast_list(struct net_device *dev) | |
3144 | { | |
3145 | } | |
3146 | ||
91572088 | 3147 | static int vxlan_change_mtu(struct net_device *dev, int new_mtu) |
345010b5 | 3148 | { |
91572088 JW |
3149 | struct vxlan_dev *vxlan = netdev_priv(dev); |
3150 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3151 | struct net_device *lowerdev = __dev_get_by_index(vxlan->net, | |
3152 | dst->remote_ifindex); | |
ce44a4ae | 3153 | bool use_ipv6 = !!(vxlan->cfg.flags & VXLAN_F_IPV6); |
345010b5 | 3154 | |
91572088 JW |
3155 | /* This check is different than dev->max_mtu, because it looks at |
3156 | * the lowerdev->mtu, rather than the static dev->max_mtu | |
3157 | */ | |
3158 | if (lowerdev) { | |
3159 | int max_mtu = lowerdev->mtu - | |
3160 | (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); | |
3161 | if (new_mtu > max_mtu) | |
72564b59 | 3162 | return -EINVAL; |
72564b59 DW |
3163 | } |
3164 | ||
345010b5 DB |
3165 | dev->mtu = new_mtu; |
3166 | return 0; | |
3167 | } | |
3168 | ||
fc4099f1 PS |
3169 | static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
3170 | { | |
3171 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3172 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
3173 | __be16 sport, dport; | |
3174 | ||
3175 | sport = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min, | |
3176 | vxlan->cfg.port_max, true); | |
3177 | dport = info->key.tp_dst ? : vxlan->cfg.dst_port; | |
3178 | ||
239e944f | 3179 | if (ip_tunnel_info_af(info) == AF_INET) { |
c6fcc4fc | 3180 | struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock); |
1a8496ba JB |
3181 | struct rtable *rt; |
3182 | ||
655c3de1 | 3183 | rt = vxlan_get_route(vxlan, dev, sock4, skb, 0, info->key.tos, |
1a8496ba | 3184 | info->key.u.ipv4.dst, |
22f0708a PA |
3185 | &info->key.u.ipv4.src, dport, sport, |
3186 | &info->dst_cache, info); | |
1a8496ba JB |
3187 | if (IS_ERR(rt)) |
3188 | return PTR_ERR(rt); | |
3189 | ip_rt_put(rt); | |
239e944f JB |
3190 | } else { |
3191 | #if IS_ENABLED(CONFIG_IPV6) | |
03dc52a8 | 3192 | struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock); |
239e944f JB |
3193 | struct dst_entry *ndst; |
3194 | ||
655c3de1 | 3195 | ndst = vxlan6_get_route(vxlan, dev, sock6, skb, 0, info->key.tos, |
e7f70af1 | 3196 | info->key.label, &info->key.u.ipv6.dst, |
22f0708a PA |
3197 | &info->key.u.ipv6.src, dport, sport, |
3198 | &info->dst_cache, info); | |
239e944f JB |
3199 | if (IS_ERR(ndst)) |
3200 | return PTR_ERR(ndst); | |
3201 | dst_release(ndst); | |
239e944f JB |
3202 | #else /* !CONFIG_IPV6 */ |
3203 | return -EPFNOSUPPORT; | |
3204 | #endif | |
3205 | } | |
1a8496ba JB |
3206 | info->key.tp_src = sport; |
3207 | info->key.tp_dst = dport; | |
239e944f | 3208 | return 0; |
fc4099f1 PS |
3209 | } |
3210 | ||
0c867c9b | 3211 | static const struct net_device_ops vxlan_netdev_ether_ops = { |
d342894c | 3212 | .ndo_init = vxlan_init, |
ebf4063e | 3213 | .ndo_uninit = vxlan_uninit, |
d342894c | 3214 | .ndo_open = vxlan_open, |
3215 | .ndo_stop = vxlan_stop, | |
3216 | .ndo_start_xmit = vxlan_xmit, | |
e8171045 | 3217 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
d342894c | 3218 | .ndo_set_rx_mode = vxlan_set_multicast_list, |
345010b5 | 3219 | .ndo_change_mtu = vxlan_change_mtu, |
d342894c | 3220 | .ndo_validate_addr = eth_validate_addr, |
3221 | .ndo_set_mac_address = eth_mac_addr, | |
3222 | .ndo_fdb_add = vxlan_fdb_add, | |
3223 | .ndo_fdb_del = vxlan_fdb_delete, | |
3224 | .ndo_fdb_dump = vxlan_fdb_dump, | |
474c3c89 | 3225 | .ndo_fdb_get = vxlan_fdb_get, |
fc4099f1 | 3226 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, |
8f1af75d | 3227 | .ndo_change_proto_down = dev_change_proto_down_generic, |
d342894c | 3228 | }; |
3229 | ||
e1e5314d JB |
3230 | static const struct net_device_ops vxlan_netdev_raw_ops = { |
3231 | .ndo_init = vxlan_init, | |
3232 | .ndo_uninit = vxlan_uninit, | |
3233 | .ndo_open = vxlan_open, | |
3234 | .ndo_stop = vxlan_stop, | |
3235 | .ndo_start_xmit = vxlan_xmit, | |
3236 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
3237 | .ndo_change_mtu = vxlan_change_mtu, | |
3238 | .ndo_fill_metadata_dst = vxlan_fill_metadata_dst, | |
3239 | }; | |
3240 | ||
d342894c | 3241 | /* Info for udev, that this is a virtual tunnel endpoint */ |
3242 | static struct device_type vxlan_type = { | |
3243 | .name = "vxlan", | |
3244 | }; | |
3245 | ||
e5de25dc | 3246 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
35e42379 | 3247 | * supply the listening VXLAN udp ports. Callers are expected |
e5de25dc | 3248 | * to implement the ndo_udp_tunnel_add. |
53cf5275 | 3249 | */ |
2d2b13fc | 3250 | static void vxlan_offload_rx_ports(struct net_device *dev, bool push) |
53cf5275 JG |
3251 | { |
3252 | struct vxlan_sock *vs; | |
3253 | struct net *net = dev_net(dev); | |
3254 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
35e42379 | 3255 | unsigned int i; |
53cf5275 JG |
3256 | |
3257 | spin_lock(&vn->sock_lock); | |
3258 | for (i = 0; i < PORT_HASH_SIZE; ++i) { | |
2d2b13fc SD |
3259 | hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist) { |
3260 | unsigned short type; | |
3261 | ||
3262 | if (vs->flags & VXLAN_F_GPE) | |
3263 | type = UDP_TUNNEL_TYPE_VXLAN_GPE; | |
3264 | else | |
3265 | type = UDP_TUNNEL_TYPE_VXLAN; | |
3266 | ||
3267 | if (push) | |
3268 | udp_tunnel_push_rx_port(dev, vs->sock, type); | |
3269 | else | |
3270 | udp_tunnel_drop_rx_port(dev, vs->sock, type); | |
3271 | } | |
53cf5275 JG |
3272 | } |
3273 | spin_unlock(&vn->sock_lock); | |
3274 | } | |
53cf5275 | 3275 | |
d342894c | 3276 | /* Initialize the device structure. */ |
3277 | static void vxlan_setup(struct net_device *dev) | |
3278 | { | |
3279 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
31fec5aa | 3280 | unsigned int h; |
d342894c | 3281 | |
65226ef8 JB |
3282 | eth_hw_addr_random(dev); |
3283 | ether_setup(dev); | |
3284 | ||
cf124db5 | 3285 | dev->needs_free_netdev = true; |
d342894c | 3286 | SET_NETDEV_DEVTYPE(dev, &vxlan_type); |
3287 | ||
d342894c | 3288 | dev->features |= NETIF_F_LLTX; |
d6727fe3 | 3289 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
0afb1666 | 3290 | dev->features |= NETIF_F_RXCSUM; |
05c0db08 | 3291 | dev->features |= NETIF_F_GSO_SOFTWARE; |
0afb1666 | 3292 | |
1eaa8178 | 3293 | dev->vlan_features = dev->features; |
0afb1666 | 3294 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
05c0db08 | 3295 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
02875878 | 3296 | netif_keep_dst(dev); |
0c867c9b | 3297 | dev->priv_flags |= IFF_NO_QUEUE; |
d342894c | 3298 | |
a985343b MS |
3299 | /* MTU range: 68 - 65535 */ |
3300 | dev->min_mtu = ETH_MIN_MTU; | |
3301 | dev->max_mtu = ETH_MAX_MTU; | |
3302 | ||
553675fb | 3303 | INIT_LIST_HEAD(&vxlan->next); |
d342894c | 3304 | |
df7e828c | 3305 | timer_setup(&vxlan->age_timer, vxlan_cleanup, TIMER_DEFERRABLE); |
d342894c | 3306 | |
3307 | vxlan->dev = dev; | |
3308 | ||
fe1e0713 L |
3309 | for (h = 0; h < FDB_HASH_SIZE; ++h) { |
3310 | spin_lock_init(&vxlan->hash_lock[h]); | |
d342894c | 3311 | INIT_HLIST_HEAD(&vxlan->fdb_head[h]); |
fe1e0713 | 3312 | } |
d342894c | 3313 | } |
3314 | ||
0c867c9b JB |
3315 | static void vxlan_ether_setup(struct net_device *dev) |
3316 | { | |
0c867c9b JB |
3317 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
3318 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
3319 | dev->netdev_ops = &vxlan_netdev_ether_ops; | |
3320 | } | |
3321 | ||
e1e5314d JB |
3322 | static void vxlan_raw_setup(struct net_device *dev) |
3323 | { | |
65226ef8 | 3324 | dev->header_ops = NULL; |
e1e5314d JB |
3325 | dev->type = ARPHRD_NONE; |
3326 | dev->hard_header_len = 0; | |
3327 | dev->addr_len = 0; | |
e1e5314d JB |
3328 | dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; |
3329 | dev->netdev_ops = &vxlan_netdev_raw_ops; | |
3330 | } | |
3331 | ||
d342894c | 3332 | static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = { |
3333 | [IFLA_VXLAN_ID] = { .type = NLA_U32 }, | |
c593642c | 3334 | [IFLA_VXLAN_GROUP] = { .len = sizeof_field(struct iphdr, daddr) }, |
e4c7ed41 | 3335 | [IFLA_VXLAN_GROUP6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 3336 | [IFLA_VXLAN_LINK] = { .type = NLA_U32 }, |
c593642c | 3337 | [IFLA_VXLAN_LOCAL] = { .len = sizeof_field(struct iphdr, saddr) }, |
e4c7ed41 | 3338 | [IFLA_VXLAN_LOCAL6] = { .len = sizeof(struct in6_addr) }, |
d342894c | 3339 | [IFLA_VXLAN_TOS] = { .type = NLA_U8 }, |
3340 | [IFLA_VXLAN_TTL] = { .type = NLA_U8 }, | |
e7f70af1 | 3341 | [IFLA_VXLAN_LABEL] = { .type = NLA_U32 }, |
d342894c | 3342 | [IFLA_VXLAN_LEARNING] = { .type = NLA_U8 }, |
3343 | [IFLA_VXLAN_AGEING] = { .type = NLA_U32 }, | |
3344 | [IFLA_VXLAN_LIMIT] = { .type = NLA_U32 }, | |
05f47d69 | 3345 | [IFLA_VXLAN_PORT_RANGE] = { .len = sizeof(struct ifla_vxlan_port_range) }, |
e4f67add DS |
3346 | [IFLA_VXLAN_PROXY] = { .type = NLA_U8 }, |
3347 | [IFLA_VXLAN_RSC] = { .type = NLA_U8 }, | |
3348 | [IFLA_VXLAN_L2MISS] = { .type = NLA_U8 }, | |
3349 | [IFLA_VXLAN_L3MISS] = { .type = NLA_U8 }, | |
f8a9b1bc | 3350 | [IFLA_VXLAN_COLLECT_METADATA] = { .type = NLA_U8 }, |
823aa873 | 3351 | [IFLA_VXLAN_PORT] = { .type = NLA_U16 }, |
5c91ae08 TH |
3352 | [IFLA_VXLAN_UDP_CSUM] = { .type = NLA_U8 }, |
3353 | [IFLA_VXLAN_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
3354 | [IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
dfd8645e TH |
3355 | [IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 }, |
3356 | [IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 }, | |
3511494c | 3357 | [IFLA_VXLAN_GBP] = { .type = NLA_FLAG, }, |
e1e5314d | 3358 | [IFLA_VXLAN_GPE] = { .type = NLA_FLAG, }, |
0ace2ca8 | 3359 | [IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG }, |
72f6d71e | 3360 | [IFLA_VXLAN_TTL_INHERIT] = { .type = NLA_FLAG }, |
b4d30697 | 3361 | [IFLA_VXLAN_DF] = { .type = NLA_U8 }, |
d342894c | 3362 | }; |
3363 | ||
a8b8a889 MS |
3364 | static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[], |
3365 | struct netlink_ext_ack *extack) | |
d342894c | 3366 | { |
3367 | if (tb[IFLA_ADDRESS]) { | |
3368 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
653ef6a3 GM |
3369 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], |
3370 | "Provided link layer address is not Ethernet"); | |
d342894c | 3371 | return -EINVAL; |
3372 | } | |
3373 | ||
3374 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
653ef6a3 GM |
3375 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], |
3376 | "Provided Ethernet address is not unicast"); | |
d342894c | 3377 | return -EADDRNOTAVAIL; |
3378 | } | |
3379 | } | |
3380 | ||
a985343b | 3381 | if (tb[IFLA_MTU]) { |
019b13ae | 3382 | u32 mtu = nla_get_u32(tb[IFLA_MTU]); |
a985343b | 3383 | |
653ef6a3 GM |
3384 | if (mtu < ETH_MIN_MTU || mtu > ETH_MAX_MTU) { |
3385 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_MTU], | |
3386 | "MTU must be between 68 and 65535"); | |
a985343b | 3387 | return -EINVAL; |
653ef6a3 | 3388 | } |
a985343b MS |
3389 | } |
3390 | ||
653ef6a3 GM |
3391 | if (!data) { |
3392 | NL_SET_ERR_MSG(extack, | |
3393 | "Required attributes not provided to perform the operation"); | |
d342894c | 3394 | return -EINVAL; |
653ef6a3 | 3395 | } |
d342894c | 3396 | |
3397 | if (data[IFLA_VXLAN_ID]) { | |
a985343b MS |
3398 | u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); |
3399 | ||
653ef6a3 | 3400 | if (id >= VXLAN_N_VID) { |
cc8e7c69 | 3401 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VXLAN_ID], |
653ef6a3 | 3402 | "VXLAN ID must be lower than 16777216"); |
d342894c | 3403 | return -ERANGE; |
653ef6a3 | 3404 | } |
d342894c | 3405 | } |
3406 | ||
05f47d69 | 3407 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
3408 | const struct ifla_vxlan_port_range *p | |
3409 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
3410 | ||
3411 | if (ntohs(p->high) < ntohs(p->low)) { | |
cc8e7c69 | 3412 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VXLAN_PORT_RANGE], |
653ef6a3 | 3413 | "Invalid source port range"); |
05f47d69 | 3414 | return -EINVAL; |
3415 | } | |
3416 | } | |
3417 | ||
b4d30697 SB |
3418 | if (data[IFLA_VXLAN_DF]) { |
3419 | enum ifla_vxlan_df df = nla_get_u8(data[IFLA_VXLAN_DF]); | |
3420 | ||
3421 | if (df < 0 || df > VXLAN_DF_MAX) { | |
cc8e7c69 | 3422 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VXLAN_DF], |
b4d30697 SB |
3423 | "Invalid DF attribute"); |
3424 | return -EINVAL; | |
3425 | } | |
3426 | } | |
3427 | ||
d342894c | 3428 | return 0; |
3429 | } | |
3430 | ||
1b13c97f YB |
3431 | static void vxlan_get_drvinfo(struct net_device *netdev, |
3432 | struct ethtool_drvinfo *drvinfo) | |
3433 | { | |
3434 | strlcpy(drvinfo->version, VXLAN_VERSION, sizeof(drvinfo->version)); | |
3435 | strlcpy(drvinfo->driver, "vxlan", sizeof(drvinfo->driver)); | |
3436 | } | |
3437 | ||
36fe3a61 MS |
3438 | static int vxlan_get_link_ksettings(struct net_device *dev, |
3439 | struct ethtool_link_ksettings *cmd) | |
3440 | { | |
3441 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3442 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3443 | struct net_device *lowerdev = __dev_get_by_index(vxlan->net, | |
3444 | dst->remote_ifindex); | |
3445 | ||
3446 | if (!lowerdev) { | |
3447 | cmd->base.duplex = DUPLEX_UNKNOWN; | |
3448 | cmd->base.port = PORT_OTHER; | |
3449 | cmd->base.speed = SPEED_UNKNOWN; | |
3450 | ||
3451 | return 0; | |
3452 | } | |
3453 | ||
3454 | return __ethtool_get_link_ksettings(lowerdev, cmd); | |
3455 | } | |
3456 | ||
1b13c97f | 3457 | static const struct ethtool_ops vxlan_ethtool_ops = { |
36fe3a61 MS |
3458 | .get_drvinfo = vxlan_get_drvinfo, |
3459 | .get_link = ethtool_op_get_link, | |
3460 | .get_link_ksettings = vxlan_get_link_ksettings, | |
1b13c97f YB |
3461 | }; |
3462 | ||
3ee64f39 | 3463 | static struct socket *vxlan_create_sock(struct net *net, bool ipv6, |
aab8cc36 | 3464 | __be16 port, u32 flags, int ifindex) |
553675fb | 3465 | { |
e4c7ed41 | 3466 | struct socket *sock; |
3ee64f39 TH |
3467 | struct udp_port_cfg udp_conf; |
3468 | int err; | |
e4c7ed41 | 3469 | |
3ee64f39 | 3470 | memset(&udp_conf, 0, sizeof(udp_conf)); |
e4c7ed41 | 3471 | |
3ee64f39 TH |
3472 | if (ipv6) { |
3473 | udp_conf.family = AF_INET6; | |
3ee64f39 | 3474 | udp_conf.use_udp6_rx_checksums = |
3dc2b6a8 | 3475 | !(flags & VXLAN_F_UDP_ZERO_CSUM6_RX); |
a43a9ef6 | 3476 | udp_conf.ipv6_v6only = 1; |
3ee64f39 TH |
3477 | } else { |
3478 | udp_conf.family = AF_INET; | |
e4c7ed41 | 3479 | } |
e4c7ed41 | 3480 | |
3ee64f39 | 3481 | udp_conf.local_udp_port = port; |
aab8cc36 | 3482 | udp_conf.bind_ifindex = ifindex; |
553675fb | 3483 | |
3ee64f39 TH |
3484 | /* Open UDP socket */ |
3485 | err = udp_sock_create(net, &udp_conf, &sock); | |
3486 | if (err < 0) | |
3487 | return ERR_PTR(err); | |
e4c7ed41 | 3488 | |
39deb2c7 | 3489 | return sock; |
e4c7ed41 CW |
3490 | } |
3491 | ||
3492 | /* Create new listen socket if needed */ | |
b1be00a6 | 3493 | static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6, |
aab8cc36 AB |
3494 | __be16 port, u32 flags, |
3495 | int ifindex) | |
e4c7ed41 CW |
3496 | { |
3497 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3498 | struct vxlan_sock *vs; | |
3499 | struct socket *sock; | |
e4c7ed41 | 3500 | unsigned int h; |
acbf74a7 | 3501 | struct udp_tunnel_sock_cfg tunnel_cfg; |
e4c7ed41 | 3502 | |
dc01e7d3 | 3503 | vs = kzalloc(sizeof(*vs), GFP_KERNEL); |
e4c7ed41 CW |
3504 | if (!vs) |
3505 | return ERR_PTR(-ENOMEM); | |
3506 | ||
3507 | for (h = 0; h < VNI_HASH_SIZE; ++h) | |
3508 | INIT_HLIST_HEAD(&vs->vni_list[h]); | |
3509 | ||
aab8cc36 | 3510 | sock = vxlan_create_sock(net, ipv6, port, flags, ifindex); |
39deb2c7 | 3511 | if (IS_ERR(sock)) { |
553675fb | 3512 | kfree(vs); |
e50fddc8 | 3513 | return ERR_CAST(sock); |
553675fb | 3514 | } |
e4c7ed41 CW |
3515 | |
3516 | vs->sock = sock; | |
66af846f | 3517 | refcount_set(&vs->refcnt, 1); |
af33c1ad | 3518 | vs->flags = (flags & VXLAN_F_RCV_FLAGS); |
553675fb | 3519 | |
9c2e24e1 PS |
3520 | spin_lock(&vn->sock_lock); |
3521 | hlist_add_head_rcu(&vs->hlist, vs_head(net, port)); | |
e7b3db5e | 3522 | udp_tunnel_notify_add_rx_port(sock, |
b9adcd69 AD |
3523 | (vs->flags & VXLAN_F_GPE) ? |
3524 | UDP_TUNNEL_TYPE_VXLAN_GPE : | |
e7b3db5e | 3525 | UDP_TUNNEL_TYPE_VXLAN); |
9c2e24e1 | 3526 | spin_unlock(&vn->sock_lock); |
553675fb | 3527 | |
3528 | /* Mark socket as an encapsulation socket. */ | |
5602c48c | 3529 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
acbf74a7 AZ |
3530 | tunnel_cfg.sk_user_data = vs; |
3531 | tunnel_cfg.encap_type = 1; | |
f2d1968e | 3532 | tunnel_cfg.encap_rcv = vxlan_rcv; |
c3a43b9f | 3533 | tunnel_cfg.encap_err_lookup = vxlan_err_lookup; |
acbf74a7 | 3534 | tunnel_cfg.encap_destroy = NULL; |
5602c48c TH |
3535 | tunnel_cfg.gro_receive = vxlan_gro_receive; |
3536 | tunnel_cfg.gro_complete = vxlan_gro_complete; | |
acbf74a7 AZ |
3537 | |
3538 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
e4c7ed41 | 3539 | |
9c2e24e1 PS |
3540 | return vs; |
3541 | } | |
3542 | ||
b1be00a6 | 3543 | static int __vxlan_sock_add(struct vxlan_dev *vxlan, bool ipv6) |
9c2e24e1 | 3544 | { |
205f356d JB |
3545 | struct vxlan_net *vn = net_generic(vxlan->net, vxlan_net_id); |
3546 | struct vxlan_sock *vs = NULL; | |
69e76661 | 3547 | struct vxlan_dev_node *node; |
aab8cc36 AB |
3548 | int l3mdev_index = 0; |
3549 | ||
3550 | if (vxlan->cfg.remote_ifindex) | |
3551 | l3mdev_index = l3mdev_master_upper_ifindex_by_index( | |
3552 | vxlan->net, vxlan->cfg.remote_ifindex); | |
9c2e24e1 | 3553 | |
205f356d | 3554 | if (!vxlan->cfg.no_share) { |
56ef9c90 | 3555 | spin_lock(&vn->sock_lock); |
205f356d | 3556 | vs = vxlan_find_sock(vxlan->net, ipv6 ? AF_INET6 : AF_INET, |
aab8cc36 AB |
3557 | vxlan->cfg.dst_port, vxlan->cfg.flags, |
3558 | l3mdev_index); | |
66af846f | 3559 | if (vs && !refcount_inc_not_zero(&vs->refcnt)) { |
56ef9c90 | 3560 | spin_unlock(&vn->sock_lock); |
205f356d | 3561 | return -EBUSY; |
56ef9c90 MRL |
3562 | } |
3563 | spin_unlock(&vn->sock_lock); | |
3564 | } | |
205f356d | 3565 | if (!vs) |
b1be00a6 | 3566 | vs = vxlan_socket_create(vxlan->net, ipv6, |
aab8cc36 AB |
3567 | vxlan->cfg.dst_port, vxlan->cfg.flags, |
3568 | l3mdev_index); | |
205f356d JB |
3569 | if (IS_ERR(vs)) |
3570 | return PTR_ERR(vs); | |
b1be00a6 | 3571 | #if IS_ENABLED(CONFIG_IPV6) |
69e76661 | 3572 | if (ipv6) { |
c6fcc4fc | 3573 | rcu_assign_pointer(vxlan->vn6_sock, vs); |
69e76661 JB |
3574 | node = &vxlan->hlist6; |
3575 | } else | |
b1be00a6 | 3576 | #endif |
69e76661 | 3577 | { |
c6fcc4fc | 3578 | rcu_assign_pointer(vxlan->vn4_sock, vs); |
69e76661 JB |
3579 | node = &vxlan->hlist4; |
3580 | } | |
3581 | vxlan_vs_add_dev(vs, vxlan, node); | |
205f356d | 3582 | return 0; |
553675fb | 3583 | } |
3584 | ||
b1be00a6 JB |
3585 | static int vxlan_sock_add(struct vxlan_dev *vxlan) |
3586 | { | |
dc5321d7 MS |
3587 | bool metadata = vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA; |
3588 | bool ipv6 = vxlan->cfg.flags & VXLAN_F_IPV6 || metadata; | |
d074bf96 | 3589 | bool ipv4 = !ipv6 || metadata; |
b1be00a6 JB |
3590 | int ret = 0; |
3591 | ||
c6fcc4fc | 3592 | RCU_INIT_POINTER(vxlan->vn4_sock, NULL); |
b1be00a6 | 3593 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 3594 | RCU_INIT_POINTER(vxlan->vn6_sock, NULL); |
d074bf96 | 3595 | if (ipv6) { |
b1be00a6 | 3596 | ret = __vxlan_sock_add(vxlan, true); |
d074bf96 JB |
3597 | if (ret < 0 && ret != -EAFNOSUPPORT) |
3598 | ipv4 = false; | |
3599 | } | |
b1be00a6 | 3600 | #endif |
d074bf96 | 3601 | if (ipv4) |
b1be00a6 JB |
3602 | ret = __vxlan_sock_add(vxlan, false); |
3603 | if (ret < 0) | |
3604 | vxlan_sock_release(vxlan); | |
3605 | return ret; | |
3606 | } | |
3607 | ||
a985343b MS |
3608 | static int vxlan_config_validate(struct net *src_net, struct vxlan_config *conf, |
3609 | struct net_device **lower, | |
653ef6a3 GM |
3610 | struct vxlan_dev *old, |
3611 | struct netlink_ext_ack *extack) | |
d342894c | 3612 | { |
33564bbb | 3613 | struct vxlan_net *vn = net_generic(src_net, vxlan_net_id); |
a985343b | 3614 | struct vxlan_dev *tmp; |
e4c7ed41 | 3615 | bool use_ipv6 = false; |
d342894c | 3616 | |
a985343b MS |
3617 | if (conf->flags & VXLAN_F_GPE) { |
3618 | /* For now, allow GPE only together with | |
3619 | * COLLECT_METADATA. This can be relaxed later; in such | |
3620 | * case, the other side of the PtP link will have to be | |
3621 | * provided. | |
3622 | */ | |
3623 | if ((conf->flags & ~VXLAN_F_ALLOWED_GPE) || | |
3624 | !(conf->flags & VXLAN_F_COLLECT_METADATA)) { | |
653ef6a3 GM |
3625 | NL_SET_ERR_MSG(extack, |
3626 | "VXLAN GPE does not support this combination of attributes"); | |
a985343b | 3627 | return -EINVAL; |
3555621d | 3628 | } |
e1e5314d | 3629 | } |
0c867c9b | 3630 | |
ce44a4ae MS |
3631 | if (!conf->remote_ip.sa.sa_family && !conf->saddr.sa.sa_family) { |
3632 | /* Unless IPv6 is explicitly requested, assume IPv4 */ | |
a985343b | 3633 | conf->remote_ip.sa.sa_family = AF_INET; |
ce44a4ae MS |
3634 | conf->saddr.sa.sa_family = AF_INET; |
3635 | } else if (!conf->remote_ip.sa.sa_family) { | |
3636 | conf->remote_ip.sa.sa_family = conf->saddr.sa.sa_family; | |
3637 | } else if (!conf->saddr.sa.sa_family) { | |
3638 | conf->saddr.sa.sa_family = conf->remote_ip.sa.sa_family; | |
3639 | } | |
3640 | ||
653ef6a3 GM |
3641 | if (conf->saddr.sa.sa_family != conf->remote_ip.sa.sa_family) { |
3642 | NL_SET_ERR_MSG(extack, | |
3643 | "Local and remote address must be from the same family"); | |
ce44a4ae | 3644 | return -EINVAL; |
653ef6a3 | 3645 | } |
e4c7ed41 | 3646 | |
653ef6a3 GM |
3647 | if (vxlan_addr_multicast(&conf->saddr)) { |
3648 | NL_SET_ERR_MSG(extack, "Local address cannot be multicast"); | |
0f22a3c6 | 3649 | return -EINVAL; |
653ef6a3 | 3650 | } |
0f22a3c6 | 3651 | |
ce44a4ae | 3652 | if (conf->saddr.sa.sa_family == AF_INET6) { |
653ef6a3 GM |
3653 | if (!IS_ENABLED(CONFIG_IPV6)) { |
3654 | NL_SET_ERR_MSG(extack, | |
3655 | "IPv6 support not enabled in the kernel"); | |
057ba29b | 3656 | return -EPFNOSUPPORT; |
653ef6a3 | 3657 | } |
e4c7ed41 | 3658 | use_ipv6 = true; |
a985343b | 3659 | conf->flags |= VXLAN_F_IPV6; |
0f22a3c6 MS |
3660 | |
3661 | if (!(conf->flags & VXLAN_F_COLLECT_METADATA)) { | |
3662 | int local_type = | |
3663 | ipv6_addr_type(&conf->saddr.sin6.sin6_addr); | |
3664 | int remote_type = | |
3665 | ipv6_addr_type(&conf->remote_ip.sin6.sin6_addr); | |
3666 | ||
3667 | if (local_type & IPV6_ADDR_LINKLOCAL) { | |
3668 | if (!(remote_type & IPV6_ADDR_LINKLOCAL) && | |
653ef6a3 GM |
3669 | (remote_type != IPV6_ADDR_ANY)) { |
3670 | NL_SET_ERR_MSG(extack, | |
3671 | "Invalid combination of local and remote address scopes"); | |
0f22a3c6 | 3672 | return -EINVAL; |
653ef6a3 | 3673 | } |
0f22a3c6 MS |
3674 | |
3675 | conf->flags |= VXLAN_F_IPV6_LINKLOCAL; | |
3676 | } else { | |
3677 | if (remote_type == | |
653ef6a3 GM |
3678 | (IPV6_ADDR_UNICAST | IPV6_ADDR_LINKLOCAL)) { |
3679 | NL_SET_ERR_MSG(extack, | |
3680 | "Invalid combination of local and remote address scopes"); | |
0f22a3c6 | 3681 | return -EINVAL; |
653ef6a3 | 3682 | } |
0f22a3c6 MS |
3683 | |
3684 | conf->flags &= ~VXLAN_F_IPV6_LINKLOCAL; | |
3685 | } | |
3686 | } | |
057ba29b | 3687 | } |
d342894c | 3688 | |
653ef6a3 GM |
3689 | if (conf->label && !use_ipv6) { |
3690 | NL_SET_ERR_MSG(extack, | |
3691 | "Label attribute only applies to IPv6 VXLAN devices"); | |
e7f70af1 | 3692 | return -EINVAL; |
653ef6a3 | 3693 | } |
e7f70af1 | 3694 | |
a985343b MS |
3695 | if (conf->remote_ifindex) { |
3696 | struct net_device *lowerdev; | |
34e02aa1 | 3697 | |
a985343b | 3698 | lowerdev = __dev_get_by_index(src_net, conf->remote_ifindex); |
653ef6a3 GM |
3699 | if (!lowerdev) { |
3700 | NL_SET_ERR_MSG(extack, | |
3701 | "Invalid local interface, device not found"); | |
34e02aa1 | 3702 | return -ENODEV; |
653ef6a3 | 3703 | } |
d342894c | 3704 | |
e4c7ed41 CW |
3705 | #if IS_ENABLED(CONFIG_IPV6) |
3706 | if (use_ipv6) { | |
3707 | struct inet6_dev *idev = __in6_dev_get(lowerdev); | |
653ef6a3 GM |
3708 | if (idev && idev->cnf.disable_ipv6) { |
3709 | NL_SET_ERR_MSG(extack, | |
3710 | "IPv6 support disabled by administrator"); | |
e4c7ed41 | 3711 | return -EPERM; |
653ef6a3 | 3712 | } |
e4c7ed41 CW |
3713 | } |
3714 | #endif | |
3715 | ||
a985343b MS |
3716 | *lower = lowerdev; |
3717 | } else { | |
653ef6a3 GM |
3718 | if (vxlan_addr_multicast(&conf->remote_ip)) { |
3719 | NL_SET_ERR_MSG(extack, | |
3720 | "Local interface required for multicast remote destination"); | |
3721 | ||
a985343b | 3722 | return -EINVAL; |
653ef6a3 | 3723 | } |
1ba56fb4 | 3724 | |
0f22a3c6 | 3725 | #if IS_ENABLED(CONFIG_IPV6) |
653ef6a3 GM |
3726 | if (conf->flags & VXLAN_F_IPV6_LINKLOCAL) { |
3727 | NL_SET_ERR_MSG(extack, | |
3728 | "Local interface required for link-local local/remote addresses"); | |
0f22a3c6 | 3729 | return -EINVAL; |
653ef6a3 | 3730 | } |
0f22a3c6 MS |
3731 | #endif |
3732 | ||
a985343b | 3733 | *lower = NULL; |
9dc2ad10 | 3734 | } |
d342894c | 3735 | |
a985343b MS |
3736 | if (!conf->dst_port) { |
3737 | if (conf->flags & VXLAN_F_GPE) | |
3738 | conf->dst_port = htons(4790); /* IANA VXLAN-GPE port */ | |
3739 | else | |
3740 | conf->dst_port = htons(vxlan_port); | |
d6acfeb1 FM |
3741 | } |
3742 | ||
a985343b MS |
3743 | if (!conf->age_interval) |
3744 | conf->age_interval = FDB_AGE_DEFAULT; | |
91572088 | 3745 | |
a985343b MS |
3746 | list_for_each_entry(tmp, &vn->vxlan_list, next) { |
3747 | if (tmp == old) | |
3748 | continue; | |
91572088 | 3749 | |
49f810f0 MS |
3750 | if (tmp->cfg.vni != conf->vni) |
3751 | continue; | |
3752 | if (tmp->cfg.dst_port != conf->dst_port) | |
3753 | continue; | |
3754 | if ((tmp->cfg.flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6)) != | |
ce44a4ae | 3755 | (conf->flags & (VXLAN_F_RCV_FLAGS | VXLAN_F_IPV6))) |
49f810f0 MS |
3756 | continue; |
3757 | ||
3758 | if ((conf->flags & VXLAN_F_IPV6_LINKLOCAL) && | |
3759 | tmp->cfg.remote_ifindex != conf->remote_ifindex) | |
3760 | continue; | |
3761 | ||
653ef6a3 GM |
3762 | NL_SET_ERR_MSG(extack, |
3763 | "A VXLAN device with the specified VNI already exists"); | |
49f810f0 | 3764 | return -EEXIST; |
a985343b | 3765 | } |
91572088 | 3766 | |
a985343b MS |
3767 | return 0; |
3768 | } | |
3769 | ||
3770 | static void vxlan_config_apply(struct net_device *dev, | |
3771 | struct vxlan_config *conf, | |
889ce937 SD |
3772 | struct net_device *lowerdev, |
3773 | struct net *src_net, | |
3774 | bool changelink) | |
a985343b MS |
3775 | { |
3776 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3777 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
3778 | unsigned short needed_headroom = ETH_HLEN; | |
3779 | bool use_ipv6 = !!(conf->flags & VXLAN_F_IPV6); | |
3780 | int max_mtu = ETH_MAX_MTU; | |
3781 | ||
3782 | if (!changelink) { | |
3783 | if (conf->flags & VXLAN_F_GPE) | |
3784 | vxlan_raw_setup(dev); | |
3785 | else | |
3786 | vxlan_ether_setup(dev); | |
3787 | ||
3788 | if (conf->mtu) | |
3789 | dev->mtu = conf->mtu; | |
889ce937 SD |
3790 | |
3791 | vxlan->net = src_net; | |
a985343b MS |
3792 | } |
3793 | ||
3794 | dst->remote_vni = conf->vni; | |
3795 | ||
3796 | memcpy(&dst->remote_ip, &conf->remote_ip, sizeof(conf->remote_ip)); | |
3797 | ||
3798 | if (lowerdev) { | |
3799 | dst->remote_ifindex = conf->remote_ifindex; | |
3800 | ||
3801 | dev->gso_max_size = lowerdev->gso_max_size; | |
3802 | dev->gso_max_segs = lowerdev->gso_max_segs; | |
91572088 | 3803 | |
a985343b | 3804 | needed_headroom = lowerdev->hard_header_len; |
91572088 | 3805 | |
a985343b MS |
3806 | max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : |
3807 | VXLAN_HEADROOM); | |
f870c1ff AK |
3808 | if (max_mtu < ETH_MIN_MTU) |
3809 | max_mtu = ETH_MIN_MTU; | |
3810 | ||
3811 | if (!changelink && !conf->mtu) | |
3812 | dev->mtu = max_mtu; | |
7e059158 DW |
3813 | } |
3814 | ||
a985343b MS |
3815 | if (dev->mtu > max_mtu) |
3816 | dev->mtu = max_mtu; | |
3817 | ||
b1be00a6 JB |
3818 | if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) |
3819 | needed_headroom += VXLAN6_HEADROOM; | |
3820 | else | |
3821 | needed_headroom += VXLAN_HEADROOM; | |
3822 | dev->needed_headroom = needed_headroom; | |
3823 | ||
0dfbdf41 | 3824 | memcpy(&vxlan->cfg, conf, sizeof(*conf)); |
a985343b | 3825 | } |
0dfbdf41 | 3826 | |
a985343b | 3827 | static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, |
653ef6a3 GM |
3828 | struct vxlan_config *conf, bool changelink, |
3829 | struct netlink_ext_ack *extack) | |
a985343b MS |
3830 | { |
3831 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
3832 | struct net_device *lowerdev; | |
3833 | int ret; | |
0dfbdf41 | 3834 | |
653ef6a3 | 3835 | ret = vxlan_config_validate(src_net, conf, &lowerdev, vxlan, extack); |
a985343b MS |
3836 | if (ret) |
3837 | return ret; | |
8bcdc4f3 | 3838 | |
889ce937 | 3839 | vxlan_config_apply(dev, conf, lowerdev, src_net, changelink); |
0dfbdf41 | 3840 | |
0dfbdf41 TG |
3841 | return 0; |
3842 | } | |
3843 | ||
c80498e3 | 3844 | static int __vxlan_dev_create(struct net *net, struct net_device *dev, |
653ef6a3 GM |
3845 | struct vxlan_config *conf, |
3846 | struct netlink_ext_ack *extack) | |
c80498e3 ND |
3847 | { |
3848 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
3849 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
0ce1822c | 3850 | struct net_device *remote_dev = NULL; |
0241b836 | 3851 | struct vxlan_fdb *f = NULL; |
6db92468 | 3852 | bool unregister = false; |
0ce1822c | 3853 | struct vxlan_rdst *dst; |
c80498e3 ND |
3854 | int err; |
3855 | ||
0ce1822c | 3856 | dst = &vxlan->default_dst; |
653ef6a3 | 3857 | err = vxlan_dev_configure(net, dev, conf, false, extack); |
c80498e3 ND |
3858 | if (err) |
3859 | return err; | |
3860 | ||
3861 | dev->ethtool_ops = &vxlan_ethtool_ops; | |
3862 | ||
3863 | /* create an fdb entry for a valid default destination */ | |
0ce1822c | 3864 | if (!vxlan_addr_any(&dst->remote_ip)) { |
0241b836 | 3865 | err = vxlan_fdb_create(vxlan, all_zeros_mac, |
0ce1822c | 3866 | &dst->remote_ip, |
c80498e3 | 3867 | NUD_REACHABLE | NUD_PERMANENT, |
c80498e3 | 3868 | vxlan->cfg.dst_port, |
0ce1822c TY |
3869 | dst->remote_vni, |
3870 | dst->remote_vni, | |
3871 | dst->remote_ifindex, | |
1274e1cc | 3872 | NTF_SELF, 0, &f, extack); |
c80498e3 ND |
3873 | if (err) |
3874 | return err; | |
3875 | } | |
3876 | ||
3877 | err = register_netdevice(dev); | |
0241b836 RP |
3878 | if (err) |
3879 | goto errout; | |
6db92468 | 3880 | unregister = true; |
0241b836 | 3881 | |
0ce1822c TY |
3882 | if (dst->remote_ifindex) { |
3883 | remote_dev = __dev_get_by_index(net, dst->remote_ifindex); | |
3884 | if (!remote_dev) | |
3885 | goto errout; | |
3886 | ||
3887 | err = netdev_upper_dev_link(remote_dev, dev, extack); | |
3888 | if (err) | |
3889 | goto errout; | |
3890 | } | |
3891 | ||
0241b836 | 3892 | err = rtnl_configure_link(dev, NULL); |
6db92468 | 3893 | if (err) |
0ce1822c | 3894 | goto unlink; |
c80498e3 | 3895 | |
61f46fe8 | 3896 | if (f) { |
0ce1822c | 3897 | vxlan_fdb_insert(vxlan, all_zeros_mac, dst->remote_vni, f); |
7c31e54a TY |
3898 | |
3899 | /* notify default fdb entry */ | |
61f46fe8 | 3900 | err = vxlan_fdb_notify(vxlan, f, first_remote_rtnl(f), |
4c59b7d1 | 3901 | RTM_NEWNEIGH, true, extack); |
7c31e54a TY |
3902 | if (err) { |
3903 | vxlan_fdb_destroy(vxlan, f, false, false); | |
0ce1822c TY |
3904 | if (remote_dev) |
3905 | netdev_upper_dev_unlink(remote_dev, dev); | |
7c31e54a TY |
3906 | goto unregister; |
3907 | } | |
61f46fe8 | 3908 | } |
0241b836 | 3909 | |
c80498e3 | 3910 | list_add(&vxlan->next, &vn->vxlan_list); |
0ce1822c TY |
3911 | if (remote_dev) |
3912 | dst->remote_dev = remote_dev; | |
c80498e3 | 3913 | return 0; |
0ce1822c TY |
3914 | unlink: |
3915 | if (remote_dev) | |
3916 | netdev_upper_dev_unlink(remote_dev, dev); | |
0241b836 | 3917 | errout: |
6db92468 PM |
3918 | /* unregister_netdevice() destroys the default FDB entry with deletion |
3919 | * notification. But the addition notification was not sent yet, so | |
3920 | * destroy the entry by hand here. | |
3921 | */ | |
0241b836 | 3922 | if (f) |
7c31e54a TY |
3923 | __vxlan_fdb_free(f); |
3924 | unregister: | |
6db92468 PM |
3925 | if (unregister) |
3926 | unregister_netdevice(dev); | |
0241b836 | 3927 | return err; |
c80498e3 ND |
3928 | } |
3929 | ||
70fb0828 RP |
3930 | /* Set/clear flags based on attribute */ |
3931 | static int vxlan_nl2flag(struct vxlan_config *conf, struct nlattr *tb[], | |
3932 | int attrtype, unsigned long mask, bool changelink, | |
3933 | bool changelink_supported, | |
3934 | struct netlink_ext_ack *extack) | |
3935 | { | |
3936 | unsigned long flags; | |
3937 | ||
3938 | if (!tb[attrtype]) | |
3939 | return 0; | |
3940 | ||
3941 | if (changelink && !changelink_supported) { | |
3942 | vxlan_flag_attr_error(attrtype, extack); | |
3943 | return -EOPNOTSUPP; | |
3944 | } | |
3945 | ||
3946 | if (vxlan_policy[attrtype].type == NLA_FLAG) | |
3947 | flags = conf->flags | mask; | |
3948 | else if (nla_get_u8(tb[attrtype])) | |
3949 | flags = conf->flags | mask; | |
3950 | else | |
3951 | flags = conf->flags & ~mask; | |
3952 | ||
3953 | conf->flags = flags; | |
3954 | ||
3955 | return 0; | |
3956 | } | |
3957 | ||
8bcdc4f3 RP |
3958 | static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[], |
3959 | struct net_device *dev, struct vxlan_config *conf, | |
70fb0828 | 3960 | bool changelink, struct netlink_ext_ack *extack) |
0dfbdf41 | 3961 | { |
8bcdc4f3 | 3962 | struct vxlan_dev *vxlan = netdev_priv(dev); |
70fb0828 | 3963 | int err = 0; |
0dfbdf41 | 3964 | |
8bcdc4f3 | 3965 | memset(conf, 0, sizeof(*conf)); |
e277de5f | 3966 | |
8bcdc4f3 RP |
3967 | /* if changelink operation, start with old existing cfg */ |
3968 | if (changelink) | |
3969 | memcpy(conf, &vxlan->cfg, sizeof(*conf)); | |
3970 | ||
3971 | if (data[IFLA_VXLAN_ID]) { | |
3972 | __be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); | |
3973 | ||
70fb0828 RP |
3974 | if (changelink && (vni != conf->vni)) { |
3975 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_ID], "Cannot change VNI"); | |
8bcdc4f3 | 3976 | return -EOPNOTSUPP; |
70fb0828 | 3977 | } |
8bcdc4f3 RP |
3978 | conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID])); |
3979 | } | |
0dfbdf41 TG |
3980 | |
3981 | if (data[IFLA_VXLAN_GROUP]) { | |
70fb0828 RP |
3982 | if (changelink && (conf->remote_ip.sa.sa_family != AF_INET)) { |
3983 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP], "New group address family does not match old group"); | |
ce44a4ae | 3984 | return -EOPNOTSUPP; |
70fb0828 | 3985 | } |
ce44a4ae | 3986 | |
8bcdc4f3 | 3987 | conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]); |
ce44a4ae | 3988 | conf->remote_ip.sa.sa_family = AF_INET; |
0dfbdf41 | 3989 | } else if (data[IFLA_VXLAN_GROUP6]) { |
70fb0828 RP |
3990 | if (!IS_ENABLED(CONFIG_IPV6)) { |
3991 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP6], "IPv6 support not enabled in the kernel"); | |
0dfbdf41 | 3992 | return -EPFNOSUPPORT; |
70fb0828 | 3993 | } |
0dfbdf41 | 3994 | |
70fb0828 RP |
3995 | if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6)) { |
3996 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP6], "New group address family does not match old group"); | |
ce44a4ae | 3997 | return -EOPNOTSUPP; |
70fb0828 | 3998 | } |
ce44a4ae | 3999 | |
8bcdc4f3 RP |
4000 | conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]); |
4001 | conf->remote_ip.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
4002 | } |
4003 | ||
4004 | if (data[IFLA_VXLAN_LOCAL]) { | |
70fb0828 RP |
4005 | if (changelink && (conf->saddr.sa.sa_family != AF_INET)) { |
4006 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL], "New local address family does not match old"); | |
ce44a4ae | 4007 | return -EOPNOTSUPP; |
70fb0828 | 4008 | } |
ce44a4ae | 4009 | |
8bcdc4f3 RP |
4010 | conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]); |
4011 | conf->saddr.sa.sa_family = AF_INET; | |
0dfbdf41 | 4012 | } else if (data[IFLA_VXLAN_LOCAL6]) { |
70fb0828 RP |
4013 | if (!IS_ENABLED(CONFIG_IPV6)) { |
4014 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL6], "IPv6 support not enabled in the kernel"); | |
0dfbdf41 | 4015 | return -EPFNOSUPPORT; |
70fb0828 | 4016 | } |
0dfbdf41 | 4017 | |
70fb0828 RP |
4018 | if (changelink && (conf->saddr.sa.sa_family != AF_INET6)) { |
4019 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL6], "New local address family does not match old"); | |
ce44a4ae | 4020 | return -EOPNOTSUPP; |
70fb0828 | 4021 | } |
ce44a4ae | 4022 | |
0dfbdf41 | 4023 | /* TODO: respect scope id */ |
8bcdc4f3 RP |
4024 | conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]); |
4025 | conf->saddr.sa.sa_family = AF_INET6; | |
0dfbdf41 TG |
4026 | } |
4027 | ||
4028 | if (data[IFLA_VXLAN_LINK]) | |
8bcdc4f3 | 4029 | conf->remote_ifindex = nla_get_u32(data[IFLA_VXLAN_LINK]); |
0dfbdf41 | 4030 | |
d342894c | 4031 | if (data[IFLA_VXLAN_TOS]) |
8bcdc4f3 | 4032 | conf->tos = nla_get_u8(data[IFLA_VXLAN_TOS]); |
d342894c | 4033 | |
afb97186 | 4034 | if (data[IFLA_VXLAN_TTL]) |
8bcdc4f3 | 4035 | conf->ttl = nla_get_u8(data[IFLA_VXLAN_TTL]); |
afb97186 | 4036 | |
72f6d71e | 4037 | if (data[IFLA_VXLAN_TTL_INHERIT]) { |
70fb0828 RP |
4038 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_TTL_INHERIT, |
4039 | VXLAN_F_TTL_INHERIT, changelink, false, | |
4040 | extack); | |
4041 | if (err) | |
4042 | return err; | |
4043 | ||
72f6d71e HL |
4044 | } |
4045 | ||
e7f70af1 | 4046 | if (data[IFLA_VXLAN_LABEL]) |
8bcdc4f3 | 4047 | conf->label = nla_get_be32(data[IFLA_VXLAN_LABEL]) & |
e7f70af1 DB |
4048 | IPV6_FLOWLABEL_MASK; |
4049 | ||
8bcdc4f3 | 4050 | if (data[IFLA_VXLAN_LEARNING]) { |
70fb0828 RP |
4051 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_LEARNING, |
4052 | VXLAN_F_LEARN, changelink, true, | |
4053 | extack); | |
4054 | if (err) | |
4055 | return err; | |
8bcdc4f3 RP |
4056 | } else if (!changelink) { |
4057 | /* default to learn on a new device */ | |
4058 | conf->flags |= VXLAN_F_LEARN; | |
4059 | } | |
d342894c | 4060 | |
40051c4d | 4061 | if (data[IFLA_VXLAN_AGEING]) |
8bcdc4f3 | 4062 | conf->age_interval = nla_get_u32(data[IFLA_VXLAN_AGEING]); |
d342894c | 4063 | |
8bcdc4f3 | 4064 | if (data[IFLA_VXLAN_PROXY]) { |
70fb0828 RP |
4065 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_PROXY, |
4066 | VXLAN_F_PROXY, changelink, false, | |
4067 | extack); | |
4068 | if (err) | |
4069 | return err; | |
8bcdc4f3 | 4070 | } |
e4f67add | 4071 | |
8bcdc4f3 | 4072 | if (data[IFLA_VXLAN_RSC]) { |
70fb0828 RP |
4073 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_RSC, |
4074 | VXLAN_F_RSC, changelink, false, | |
4075 | extack); | |
4076 | if (err) | |
4077 | return err; | |
8bcdc4f3 | 4078 | } |
e4f67add | 4079 | |
8bcdc4f3 | 4080 | if (data[IFLA_VXLAN_L2MISS]) { |
70fb0828 RP |
4081 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_L2MISS, |
4082 | VXLAN_F_L2MISS, changelink, false, | |
4083 | extack); | |
4084 | if (err) | |
4085 | return err; | |
8bcdc4f3 | 4086 | } |
e4f67add | 4087 | |
8bcdc4f3 | 4088 | if (data[IFLA_VXLAN_L3MISS]) { |
70fb0828 RP |
4089 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_L3MISS, |
4090 | VXLAN_F_L3MISS, changelink, false, | |
4091 | extack); | |
4092 | if (err) | |
4093 | return err; | |
8bcdc4f3 | 4094 | } |
e4f67add | 4095 | |
8bcdc4f3 | 4096 | if (data[IFLA_VXLAN_LIMIT]) { |
70fb0828 RP |
4097 | if (changelink) { |
4098 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LIMIT], | |
4099 | "Cannot change limit"); | |
8bcdc4f3 | 4100 | return -EOPNOTSUPP; |
70fb0828 | 4101 | } |
8bcdc4f3 RP |
4102 | conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]); |
4103 | } | |
d342894c | 4104 | |
8bcdc4f3 | 4105 | if (data[IFLA_VXLAN_COLLECT_METADATA]) { |
70fb0828 RP |
4106 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_COLLECT_METADATA, |
4107 | VXLAN_F_COLLECT_METADATA, changelink, false, | |
4108 | extack); | |
4109 | if (err) | |
4110 | return err; | |
8bcdc4f3 | 4111 | } |
f8a9b1bc | 4112 | |
05f47d69 | 4113 | if (data[IFLA_VXLAN_PORT_RANGE]) { |
8bcdc4f3 RP |
4114 | if (!changelink) { |
4115 | const struct ifla_vxlan_port_range *p | |
4116 | = nla_data(data[IFLA_VXLAN_PORT_RANGE]); | |
4117 | conf->port_min = ntohs(p->low); | |
4118 | conf->port_max = ntohs(p->high); | |
4119 | } else { | |
70fb0828 RP |
4120 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT_RANGE], |
4121 | "Cannot change port range"); | |
8bcdc4f3 RP |
4122 | return -EOPNOTSUPP; |
4123 | } | |
05f47d69 | 4124 | } |
4125 | ||
8bcdc4f3 | 4126 | if (data[IFLA_VXLAN_PORT]) { |
70fb0828 RP |
4127 | if (changelink) { |
4128 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT], | |
4129 | "Cannot change port"); | |
8bcdc4f3 | 4130 | return -EOPNOTSUPP; |
70fb0828 | 4131 | } |
8bcdc4f3 RP |
4132 | conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]); |
4133 | } | |
823aa873 | 4134 | |
8bcdc4f3 | 4135 | if (data[IFLA_VXLAN_UDP_CSUM]) { |
70fb0828 RP |
4136 | if (changelink) { |
4137 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_UDP_CSUM], | |
4138 | "Cannot change UDP_CSUM flag"); | |
8bcdc4f3 | 4139 | return -EOPNOTSUPP; |
70fb0828 | 4140 | } |
8bcdc4f3 RP |
4141 | if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM])) |
4142 | conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX; | |
4143 | } | |
359a0ea9 | 4144 | |
8bcdc4f3 | 4145 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) { |
70fb0828 RP |
4146 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
4147 | VXLAN_F_UDP_ZERO_CSUM6_TX, changelink, | |
4148 | false, extack); | |
4149 | if (err) | |
4150 | return err; | |
8bcdc4f3 | 4151 | } |
359a0ea9 | 4152 | |
8bcdc4f3 | 4153 | if (data[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) { |
70fb0828 RP |
4154 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, |
4155 | VXLAN_F_UDP_ZERO_CSUM6_RX, changelink, | |
4156 | false, extack); | |
4157 | if (err) | |
4158 | return err; | |
8bcdc4f3 | 4159 | } |
359a0ea9 | 4160 | |
8bcdc4f3 | 4161 | if (data[IFLA_VXLAN_REMCSUM_TX]) { |
70fb0828 RP |
4162 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_REMCSUM_TX, |
4163 | VXLAN_F_REMCSUM_TX, changelink, false, | |
4164 | extack); | |
4165 | if (err) | |
4166 | return err; | |
8bcdc4f3 | 4167 | } |
dfd8645e | 4168 | |
8bcdc4f3 | 4169 | if (data[IFLA_VXLAN_REMCSUM_RX]) { |
70fb0828 RP |
4170 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_REMCSUM_RX, |
4171 | VXLAN_F_REMCSUM_RX, changelink, false, | |
4172 | extack); | |
4173 | if (err) | |
4174 | return err; | |
8bcdc4f3 RP |
4175 | } |
4176 | ||
4177 | if (data[IFLA_VXLAN_GBP]) { | |
70fb0828 RP |
4178 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_GBP, |
4179 | VXLAN_F_GBP, changelink, false, extack); | |
4180 | if (err) | |
4181 | return err; | |
8bcdc4f3 RP |
4182 | } |
4183 | ||
4184 | if (data[IFLA_VXLAN_GPE]) { | |
70fb0828 RP |
4185 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_GPE, |
4186 | VXLAN_F_GPE, changelink, false, | |
4187 | extack); | |
4188 | if (err) | |
4189 | return err; | |
8bcdc4f3 RP |
4190 | } |
4191 | ||
4192 | if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) { | |
70fb0828 RP |
4193 | err = vxlan_nl2flag(conf, data, IFLA_VXLAN_REMCSUM_NOPARTIAL, |
4194 | VXLAN_F_REMCSUM_NOPARTIAL, changelink, | |
4195 | false, extack); | |
4196 | if (err) | |
4197 | return err; | |
8bcdc4f3 RP |
4198 | } |
4199 | ||
4200 | if (tb[IFLA_MTU]) { | |
70fb0828 RP |
4201 | if (changelink) { |
4202 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_MTU], | |
4203 | "Cannot change mtu"); | |
8bcdc4f3 | 4204 | return -EOPNOTSUPP; |
70fb0828 | 4205 | } |
8bcdc4f3 RP |
4206 | conf->mtu = nla_get_u32(tb[IFLA_MTU]); |
4207 | } | |
4208 | ||
b4d30697 SB |
4209 | if (data[IFLA_VXLAN_DF]) |
4210 | conf->df = nla_get_u8(data[IFLA_VXLAN_DF]); | |
4211 | ||
8bcdc4f3 RP |
4212 | return 0; |
4213 | } | |
4214 | ||
4215 | static int vxlan_newlink(struct net *src_net, struct net_device *dev, | |
7a3f4a18 MS |
4216 | struct nlattr *tb[], struct nlattr *data[], |
4217 | struct netlink_ext_ack *extack) | |
8bcdc4f3 | 4218 | { |
8bcdc4f3 RP |
4219 | struct vxlan_config conf; |
4220 | int err; | |
4221 | ||
70fb0828 | 4222 | err = vxlan_nl2conf(tb, data, dev, &conf, false, extack); |
8bcdc4f3 RP |
4223 | if (err) |
4224 | return err; | |
4225 | ||
653ef6a3 | 4226 | return __vxlan_dev_create(src_net, dev, &conf, extack); |
8bcdc4f3 | 4227 | } |
dfd8645e | 4228 | |
8bcdc4f3 | 4229 | static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[], |
ad744b22 MS |
4230 | struct nlattr *data[], |
4231 | struct netlink_ext_ack *extack) | |
8bcdc4f3 RP |
4232 | { |
4233 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
8db9427d | 4234 | struct net_device *lowerdev; |
8bcdc4f3 | 4235 | struct vxlan_config conf; |
0ce1822c | 4236 | struct vxlan_rdst *dst; |
8bcdc4f3 RP |
4237 | int err; |
4238 | ||
0ce1822c | 4239 | dst = &vxlan->default_dst; |
70fb0828 | 4240 | err = vxlan_nl2conf(tb, data, dev, &conf, true, extack); |
8bcdc4f3 RP |
4241 | if (err) |
4242 | return err; | |
3511494c | 4243 | |
8db9427d PM |
4244 | err = vxlan_config_validate(vxlan->net, &conf, &lowerdev, |
4245 | vxlan, extack); | |
8bcdc4f3 RP |
4246 | if (err) |
4247 | return err; | |
0ace2ca8 | 4248 | |
c6761cf5 TY |
4249 | if (dst->remote_dev == lowerdev) |
4250 | lowerdev = NULL; | |
4251 | ||
0ce1822c TY |
4252 | err = netdev_adjacent_change_prepare(dst->remote_dev, lowerdev, dev, |
4253 | extack); | |
4254 | if (err) | |
4255 | return err; | |
4256 | ||
8bcdc4f3 | 4257 | /* handle default dst entry */ |
038a5a99 | 4258 | if (!vxlan_addr_equal(&conf.remote_ip, &dst->remote_ip)) { |
fe1e0713 L |
4259 | u32 hash_index = fdb_head_index(vxlan, all_zeros_mac, conf.vni); |
4260 | ||
4261 | spin_lock_bh(&vxlan->hash_lock[hash_index]); | |
038a5a99 | 4262 | if (!vxlan_addr_any(&conf.remote_ip)) { |
ce5e098f | 4263 | err = vxlan_fdb_update(vxlan, all_zeros_mac, |
038a5a99 | 4264 | &conf.remote_ip, |
8bcdc4f3 | 4265 | NUD_REACHABLE | NUD_PERMANENT, |
ce5e098f | 4266 | NLM_F_APPEND | NLM_F_CREATE, |
8bcdc4f3 | 4267 | vxlan->cfg.dst_port, |
038a5a99 PM |
4268 | conf.vni, conf.vni, |
4269 | conf.remote_ifindex, | |
1274e1cc | 4270 | NTF_SELF, 0, true, extack); |
8bcdc4f3 | 4271 | if (err) { |
fe1e0713 | 4272 | spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
0ce1822c TY |
4273 | netdev_adjacent_change_abort(dst->remote_dev, |
4274 | lowerdev, dev); | |
8bcdc4f3 RP |
4275 | return err; |
4276 | } | |
4277 | } | |
1cdc98c2 PM |
4278 | if (!vxlan_addr_any(&dst->remote_ip)) |
4279 | __vxlan_fdb_delete(vxlan, all_zeros_mac, | |
4280 | dst->remote_ip, | |
4281 | vxlan->cfg.dst_port, | |
4282 | dst->remote_vni, | |
4283 | dst->remote_vni, | |
4284 | dst->remote_ifindex, | |
4285 | true); | |
fe1e0713 | 4286 | spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
8bcdc4f3 | 4287 | } |
ce577668 | 4288 | |
038a5a99 PM |
4289 | if (conf.age_interval != vxlan->cfg.age_interval) |
4290 | mod_timer(&vxlan->age_timer, jiffies); | |
4291 | ||
0ce1822c | 4292 | netdev_adjacent_change_commit(dst->remote_dev, lowerdev, dev); |
845e0ebb | 4293 | if (lowerdev && lowerdev != dst->remote_dev) |
0ce1822c | 4294 | dst->remote_dev = lowerdev; |
038a5a99 | 4295 | vxlan_config_apply(dev, &conf, lowerdev, vxlan->net, true); |
8bcdc4f3 | 4296 | return 0; |
d342894c | 4297 | } |
4298 | ||
4299 | static void vxlan_dellink(struct net_device *dev, struct list_head *head) | |
4300 | { | |
4301 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4302 | ||
8b3f9337 RP |
4303 | vxlan_flush(vxlan, true); |
4304 | ||
553675fb | 4305 | list_del(&vxlan->next); |
d342894c | 4306 | unregister_netdevice_queue(dev, head); |
0ce1822c TY |
4307 | if (vxlan->default_dst.remote_dev) |
4308 | netdev_upper_dev_unlink(vxlan->default_dst.remote_dev, dev); | |
d342894c | 4309 | } |
4310 | ||
4311 | static size_t vxlan_get_size(const struct net_device *dev) | |
4312 | { | |
4313 | ||
4314 | return nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_ID */ | |
e4c7ed41 | 4315 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_GROUP{6} */ |
d342894c | 4316 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LINK */ |
e4c7ed41 | 4317 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_VXLAN_LOCAL{6} */ |
d342894c | 4318 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL */ |
8fd78069 | 4319 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TTL_INHERIT */ |
d342894c | 4320 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_TOS */ |
b4d30697 | 4321 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_DF */ |
e7f70af1 | 4322 | nla_total_size(sizeof(__be32)) + /* IFLA_VXLAN_LABEL */ |
d342894c | 4323 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_LEARNING */ |
e4f67add DS |
4324 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_PROXY */ |
4325 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_RSC */ | |
4326 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L2MISS */ | |
4327 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_L3MISS */ | |
da8b43c0 | 4328 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_COLLECT_METADATA */ |
d342894c | 4329 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_AGEING */ |
4330 | nla_total_size(sizeof(__u32)) + /* IFLA_VXLAN_LIMIT */ | |
05f47d69 | 4331 | nla_total_size(sizeof(struct ifla_vxlan_port_range)) + |
359a0ea9 TH |
4332 | nla_total_size(sizeof(__be16)) + /* IFLA_VXLAN_PORT */ |
4333 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_CSUM */ | |
4334 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_TX */ | |
4335 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_UDP_ZERO_CSUM6_RX */ | |
dfd8645e TH |
4336 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_TX */ |
4337 | nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_REMCSUM_RX */ | |
d342894c | 4338 | 0; |
4339 | } | |
4340 | ||
4341 | static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
4342 | { | |
4343 | const struct vxlan_dev *vxlan = netdev_priv(dev); | |
c7995c43 | 4344 | const struct vxlan_rdst *dst = &vxlan->default_dst; |
05f47d69 | 4345 | struct ifla_vxlan_port_range ports = { |
0dfbdf41 TG |
4346 | .low = htons(vxlan->cfg.port_min), |
4347 | .high = htons(vxlan->cfg.port_max), | |
05f47d69 | 4348 | }; |
d342894c | 4349 | |
54bfd872 | 4350 | if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(dst->remote_vni))) |
d342894c | 4351 | goto nla_put_failure; |
4352 | ||
e4c7ed41 CW |
4353 | if (!vxlan_addr_any(&dst->remote_ip)) { |
4354 | if (dst->remote_ip.sa.sa_family == AF_INET) { | |
930345ea JB |
4355 | if (nla_put_in_addr(skb, IFLA_VXLAN_GROUP, |
4356 | dst->remote_ip.sin.sin_addr.s_addr)) | |
e4c7ed41 CW |
4357 | goto nla_put_failure; |
4358 | #if IS_ENABLED(CONFIG_IPV6) | |
4359 | } else { | |
930345ea JB |
4360 | if (nla_put_in6_addr(skb, IFLA_VXLAN_GROUP6, |
4361 | &dst->remote_ip.sin6.sin6_addr)) | |
e4c7ed41 CW |
4362 | goto nla_put_failure; |
4363 | #endif | |
4364 | } | |
4365 | } | |
d342894c | 4366 | |
c7995c43 | 4367 | if (dst->remote_ifindex && nla_put_u32(skb, IFLA_VXLAN_LINK, dst->remote_ifindex)) |
d342894c | 4368 | goto nla_put_failure; |
4369 | ||
0dfbdf41 TG |
4370 | if (!vxlan_addr_any(&vxlan->cfg.saddr)) { |
4371 | if (vxlan->cfg.saddr.sa.sa_family == AF_INET) { | |
930345ea | 4372 | if (nla_put_in_addr(skb, IFLA_VXLAN_LOCAL, |
0dfbdf41 | 4373 | vxlan->cfg.saddr.sin.sin_addr.s_addr)) |
e4c7ed41 CW |
4374 | goto nla_put_failure; |
4375 | #if IS_ENABLED(CONFIG_IPV6) | |
4376 | } else { | |
930345ea | 4377 | if (nla_put_in6_addr(skb, IFLA_VXLAN_LOCAL6, |
0dfbdf41 | 4378 | &vxlan->cfg.saddr.sin6.sin6_addr)) |
e4c7ed41 CW |
4379 | goto nla_put_failure; |
4380 | #endif | |
4381 | } | |
4382 | } | |
d342894c | 4383 | |
0dfbdf41 | 4384 | if (nla_put_u8(skb, IFLA_VXLAN_TTL, vxlan->cfg.ttl) || |
8fd78069 HL |
4385 | nla_put_u8(skb, IFLA_VXLAN_TTL_INHERIT, |
4386 | !!(vxlan->cfg.flags & VXLAN_F_TTL_INHERIT)) || | |
0dfbdf41 | 4387 | nla_put_u8(skb, IFLA_VXLAN_TOS, vxlan->cfg.tos) || |
b4d30697 | 4388 | nla_put_u8(skb, IFLA_VXLAN_DF, vxlan->cfg.df) || |
e7f70af1 | 4389 | nla_put_be32(skb, IFLA_VXLAN_LABEL, vxlan->cfg.label) || |
e4f67add | 4390 | nla_put_u8(skb, IFLA_VXLAN_LEARNING, |
98c81476 | 4391 | !!(vxlan->cfg.flags & VXLAN_F_LEARN)) || |
e4f67add | 4392 | nla_put_u8(skb, IFLA_VXLAN_PROXY, |
98c81476 | 4393 | !!(vxlan->cfg.flags & VXLAN_F_PROXY)) || |
dc5321d7 MS |
4394 | nla_put_u8(skb, IFLA_VXLAN_RSC, |
4395 | !!(vxlan->cfg.flags & VXLAN_F_RSC)) || | |
e4f67add | 4396 | nla_put_u8(skb, IFLA_VXLAN_L2MISS, |
98c81476 | 4397 | !!(vxlan->cfg.flags & VXLAN_F_L2MISS)) || |
e4f67add | 4398 | nla_put_u8(skb, IFLA_VXLAN_L3MISS, |
98c81476 | 4399 | !!(vxlan->cfg.flags & VXLAN_F_L3MISS)) || |
da8b43c0 | 4400 | nla_put_u8(skb, IFLA_VXLAN_COLLECT_METADATA, |
dc5321d7 | 4401 | !!(vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA)) || |
0dfbdf41 TG |
4402 | nla_put_u32(skb, IFLA_VXLAN_AGEING, vxlan->cfg.age_interval) || |
4403 | nla_put_u32(skb, IFLA_VXLAN_LIMIT, vxlan->cfg.addrmax) || | |
4404 | nla_put_be16(skb, IFLA_VXLAN_PORT, vxlan->cfg.dst_port) || | |
359a0ea9 | 4405 | nla_put_u8(skb, IFLA_VXLAN_UDP_CSUM, |
98c81476 | 4406 | !(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM_TX)) || |
359a0ea9 | 4407 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, |
98c81476 | 4408 | !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_TX)) || |
359a0ea9 | 4409 | nla_put_u8(skb, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, |
98c81476 | 4410 | !!(vxlan->cfg.flags & VXLAN_F_UDP_ZERO_CSUM6_RX)) || |
dfd8645e | 4411 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_TX, |
98c81476 | 4412 | !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_TX)) || |
dfd8645e | 4413 | nla_put_u8(skb, IFLA_VXLAN_REMCSUM_RX, |
98c81476 | 4414 | !!(vxlan->cfg.flags & VXLAN_F_REMCSUM_RX))) |
d342894c | 4415 | goto nla_put_failure; |
4416 | ||
05f47d69 | 4417 | if (nla_put(skb, IFLA_VXLAN_PORT_RANGE, sizeof(ports), &ports)) |
4418 | goto nla_put_failure; | |
4419 | ||
dc5321d7 | 4420 | if (vxlan->cfg.flags & VXLAN_F_GBP && |
3511494c TG |
4421 | nla_put_flag(skb, IFLA_VXLAN_GBP)) |
4422 | goto nla_put_failure; | |
4423 | ||
dc5321d7 | 4424 | if (vxlan->cfg.flags & VXLAN_F_GPE && |
e1e5314d JB |
4425 | nla_put_flag(skb, IFLA_VXLAN_GPE)) |
4426 | goto nla_put_failure; | |
4427 | ||
dc5321d7 | 4428 | if (vxlan->cfg.flags & VXLAN_F_REMCSUM_NOPARTIAL && |
0ace2ca8 TH |
4429 | nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL)) |
4430 | goto nla_put_failure; | |
4431 | ||
d342894c | 4432 | return 0; |
4433 | ||
4434 | nla_put_failure: | |
4435 | return -EMSGSIZE; | |
4436 | } | |
4437 | ||
1728d4fa ND |
4438 | static struct net *vxlan_get_link_net(const struct net_device *dev) |
4439 | { | |
4440 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4441 | ||
4442 | return vxlan->net; | |
4443 | } | |
4444 | ||
d342894c | 4445 | static struct rtnl_link_ops vxlan_link_ops __read_mostly = { |
4446 | .kind = "vxlan", | |
4447 | .maxtype = IFLA_VXLAN_MAX, | |
4448 | .policy = vxlan_policy, | |
4449 | .priv_size = sizeof(struct vxlan_dev), | |
4450 | .setup = vxlan_setup, | |
4451 | .validate = vxlan_validate, | |
4452 | .newlink = vxlan_newlink, | |
8bcdc4f3 | 4453 | .changelink = vxlan_changelink, |
d342894c | 4454 | .dellink = vxlan_dellink, |
4455 | .get_size = vxlan_get_size, | |
4456 | .fill_info = vxlan_fill_info, | |
1728d4fa | 4457 | .get_link_net = vxlan_get_link_net, |
d342894c | 4458 | }; |
4459 | ||
cf5da330 ND |
4460 | struct net_device *vxlan_dev_create(struct net *net, const char *name, |
4461 | u8 name_assign_type, | |
4462 | struct vxlan_config *conf) | |
4463 | { | |
4464 | struct nlattr *tb[IFLA_MAX + 1]; | |
4465 | struct net_device *dev; | |
4466 | int err; | |
4467 | ||
4468 | memset(&tb, 0, sizeof(tb)); | |
4469 | ||
4470 | dev = rtnl_create_link(net, name, name_assign_type, | |
d0522f1c | 4471 | &vxlan_link_ops, tb, NULL); |
cf5da330 ND |
4472 | if (IS_ERR(dev)) |
4473 | return dev; | |
4474 | ||
653ef6a3 | 4475 | err = __vxlan_dev_create(net, dev, conf, NULL); |
cf5da330 ND |
4476 | if (err < 0) { |
4477 | free_netdev(dev); | |
4478 | return ERR_PTR(err); | |
4479 | } | |
4480 | ||
4481 | err = rtnl_configure_link(dev, NULL); | |
4482 | if (err < 0) { | |
4483 | LIST_HEAD(list_kill); | |
4484 | ||
4485 | vxlan_dellink(dev, &list_kill); | |
4486 | unregister_netdevice_many(&list_kill); | |
4487 | return ERR_PTR(err); | |
4488 | } | |
4489 | ||
4490 | return dev; | |
4491 | } | |
4492 | EXPORT_SYMBOL_GPL(vxlan_dev_create); | |
4493 | ||
acaf4e70 DB |
4494 | static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, |
4495 | struct net_device *dev) | |
4496 | { | |
4497 | struct vxlan_dev *vxlan, *next; | |
4498 | LIST_HEAD(list_kill); | |
4499 | ||
4500 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
4501 | struct vxlan_rdst *dst = &vxlan->default_dst; | |
4502 | ||
4503 | /* In case we created vxlan device with carrier | |
4504 | * and we loose the carrier due to module unload | |
4505 | * we also need to remove vxlan device. In other | |
4506 | * cases, it's not necessary and remote_ifindex | |
4507 | * is 0 here, so no matches. | |
4508 | */ | |
4509 | if (dst->remote_ifindex == dev->ifindex) | |
4510 | vxlan_dellink(vxlan->dev, &list_kill); | |
4511 | } | |
4512 | ||
4513 | unregister_netdevice_many(&list_kill); | |
4514 | } | |
4515 | ||
b7aade15 HFS |
4516 | static int vxlan_netdevice_event(struct notifier_block *unused, |
4517 | unsigned long event, void *ptr) | |
acaf4e70 DB |
4518 | { |
4519 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
783c1463 | 4520 | struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); |
acaf4e70 | 4521 | |
04584957 | 4522 | if (event == NETDEV_UNREGISTER) { |
cc4e3835 JK |
4523 | if (!dev->udp_tunnel_nic_info) |
4524 | vxlan_offload_rx_ports(dev, false); | |
acaf4e70 | 4525 | vxlan_handle_lowerdev_unregister(vn, dev); |
04584957 | 4526 | } else if (event == NETDEV_REGISTER) { |
cc4e3835 JK |
4527 | if (!dev->udp_tunnel_nic_info) |
4528 | vxlan_offload_rx_ports(dev, true); | |
04584957 SD |
4529 | } else if (event == NETDEV_UDP_TUNNEL_PUSH_INFO || |
4530 | event == NETDEV_UDP_TUNNEL_DROP_INFO) { | |
2d2b13fc | 4531 | vxlan_offload_rx_ports(dev, event == NETDEV_UDP_TUNNEL_PUSH_INFO); |
04584957 | 4532 | } |
acaf4e70 DB |
4533 | |
4534 | return NOTIFY_DONE; | |
4535 | } | |
4536 | ||
4537 | static struct notifier_block vxlan_notifier_block __read_mostly = { | |
b7aade15 | 4538 | .notifier_call = vxlan_netdevice_event, |
acaf4e70 DB |
4539 | }; |
4540 | ||
0efe1173 PM |
4541 | static void |
4542 | vxlan_fdb_offloaded_set(struct net_device *dev, | |
4543 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
4544 | { | |
4545 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4546 | struct vxlan_rdst *rdst; | |
4547 | struct vxlan_fdb *f; | |
fe1e0713 L |
4548 | u32 hash_index; |
4549 | ||
4550 | hash_index = fdb_head_index(vxlan, fdb_info->eth_addr, fdb_info->vni); | |
0efe1173 | 4551 | |
fe1e0713 | 4552 | spin_lock_bh(&vxlan->hash_lock[hash_index]); |
0efe1173 PM |
4553 | |
4554 | f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni); | |
4555 | if (!f) | |
4556 | goto out; | |
4557 | ||
4558 | rdst = vxlan_fdb_find_rdst(f, &fdb_info->remote_ip, | |
4559 | fdb_info->remote_port, | |
4560 | fdb_info->remote_vni, | |
4561 | fdb_info->remote_ifindex); | |
4562 | if (!rdst) | |
4563 | goto out; | |
4564 | ||
4565 | rdst->offloaded = fdb_info->offloaded; | |
4566 | ||
4567 | out: | |
fe1e0713 | 4568 | spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
0efe1173 PM |
4569 | } |
4570 | ||
5728ae0d PM |
4571 | static int |
4572 | vxlan_fdb_external_learn_add(struct net_device *dev, | |
4573 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
4574 | { | |
4575 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4c59b7d1 | 4576 | struct netlink_ext_ack *extack; |
fe1e0713 | 4577 | u32 hash_index; |
5728ae0d PM |
4578 | int err; |
4579 | ||
fe1e0713 | 4580 | hash_index = fdb_head_index(vxlan, fdb_info->eth_addr, fdb_info->vni); |
4c59b7d1 PM |
4581 | extack = switchdev_notifier_info_to_extack(&fdb_info->info); |
4582 | ||
fe1e0713 | 4583 | spin_lock_bh(&vxlan->hash_lock[hash_index]); |
5728ae0d PM |
4584 | err = vxlan_fdb_update(vxlan, fdb_info->eth_addr, &fdb_info->remote_ip, |
4585 | NUD_REACHABLE, | |
4586 | NLM_F_CREATE | NLM_F_REPLACE, | |
4587 | fdb_info->remote_port, | |
4588 | fdb_info->vni, | |
4589 | fdb_info->remote_vni, | |
4590 | fdb_info->remote_ifindex, | |
4591 | NTF_USE | NTF_SELF | NTF_EXT_LEARNED, | |
1274e1cc | 4592 | 0, false, extack); |
fe1e0713 | 4593 | spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
5728ae0d PM |
4594 | |
4595 | return err; | |
4596 | } | |
4597 | ||
4598 | static int | |
4599 | vxlan_fdb_external_learn_del(struct net_device *dev, | |
4600 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
4601 | { | |
4602 | struct vxlan_dev *vxlan = netdev_priv(dev); | |
4603 | struct vxlan_fdb *f; | |
fe1e0713 | 4604 | u32 hash_index; |
5728ae0d PM |
4605 | int err = 0; |
4606 | ||
fe1e0713 L |
4607 | hash_index = fdb_head_index(vxlan, fdb_info->eth_addr, fdb_info->vni); |
4608 | spin_lock_bh(&vxlan->hash_lock[hash_index]); | |
5728ae0d PM |
4609 | |
4610 | f = vxlan_find_mac(vxlan, fdb_info->eth_addr, fdb_info->vni); | |
4611 | if (!f) | |
4612 | err = -ENOENT; | |
4613 | else if (f->flags & NTF_EXT_LEARNED) | |
4614 | err = __vxlan_fdb_delete(vxlan, fdb_info->eth_addr, | |
4615 | fdb_info->remote_ip, | |
4616 | fdb_info->remote_port, | |
4617 | fdb_info->vni, | |
4618 | fdb_info->remote_vni, | |
4619 | fdb_info->remote_ifindex, | |
4620 | false); | |
4621 | ||
fe1e0713 | 4622 | spin_unlock_bh(&vxlan->hash_lock[hash_index]); |
5728ae0d PM |
4623 | |
4624 | return err; | |
4625 | } | |
4626 | ||
0efe1173 PM |
4627 | static int vxlan_switchdev_event(struct notifier_block *unused, |
4628 | unsigned long event, void *ptr) | |
4629 | { | |
4630 | struct net_device *dev = switchdev_notifier_info_to_dev(ptr); | |
5728ae0d PM |
4631 | struct switchdev_notifier_vxlan_fdb_info *fdb_info; |
4632 | int err = 0; | |
0efe1173 PM |
4633 | |
4634 | switch (event) { | |
4635 | case SWITCHDEV_VXLAN_FDB_OFFLOADED: | |
4636 | vxlan_fdb_offloaded_set(dev, ptr); | |
4637 | break; | |
5728ae0d PM |
4638 | case SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE: |
4639 | fdb_info = ptr; | |
4640 | err = vxlan_fdb_external_learn_add(dev, fdb_info); | |
4641 | if (err) { | |
4642 | err = notifier_from_errno(err); | |
4643 | break; | |
4644 | } | |
4645 | fdb_info->offloaded = true; | |
4646 | vxlan_fdb_offloaded_set(dev, fdb_info); | |
4647 | break; | |
4648 | case SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE: | |
4649 | fdb_info = ptr; | |
4650 | err = vxlan_fdb_external_learn_del(dev, fdb_info); | |
4651 | if (err) { | |
4652 | err = notifier_from_errno(err); | |
4653 | break; | |
4654 | } | |
4655 | fdb_info->offloaded = false; | |
4656 | vxlan_fdb_offloaded_set(dev, fdb_info); | |
4657 | break; | |
0efe1173 PM |
4658 | } |
4659 | ||
5728ae0d | 4660 | return err; |
0efe1173 PM |
4661 | } |
4662 | ||
4663 | static struct notifier_block vxlan_switchdev_notifier_block __read_mostly = { | |
4664 | .notifier_call = vxlan_switchdev_event, | |
4665 | }; | |
4666 | ||
79472fe8 RP |
4667 | static void vxlan_fdb_nh_flush(struct nexthop *nh) |
4668 | { | |
4669 | struct vxlan_fdb *fdb; | |
4670 | struct vxlan_dev *vxlan; | |
4671 | u32 hash_index; | |
4672 | ||
4673 | rcu_read_lock(); | |
4674 | list_for_each_entry_rcu(fdb, &nh->fdb_list, nh_list) { | |
4675 | vxlan = rcu_dereference(fdb->vdev); | |
4676 | WARN_ON(!vxlan); | |
4677 | hash_index = fdb_head_index(vxlan, fdb->eth_addr, | |
4678 | vxlan->default_dst.remote_vni); | |
4679 | spin_lock_bh(&vxlan->hash_lock[hash_index]); | |
4680 | if (!hlist_unhashed(&fdb->hlist)) | |
4681 | vxlan_fdb_destroy(vxlan, fdb, false, false); | |
4682 | spin_unlock_bh(&vxlan->hash_lock[hash_index]); | |
4683 | } | |
4684 | rcu_read_unlock(); | |
4685 | } | |
4686 | ||
c7cdbe2e RP |
4687 | static int vxlan_nexthop_event(struct notifier_block *nb, |
4688 | unsigned long event, void *ptr) | |
4689 | { | |
4690 | struct nexthop *nh = ptr; | |
c7cdbe2e RP |
4691 | |
4692 | if (!nh || event != NEXTHOP_EVENT_DEL) | |
4693 | return NOTIFY_DONE; | |
4694 | ||
79472fe8 | 4695 | vxlan_fdb_nh_flush(nh); |
c7cdbe2e RP |
4696 | |
4697 | return NOTIFY_DONE; | |
4698 | } | |
4699 | ||
4700 | static struct notifier_block vxlan_nexthop_notifier_block __read_mostly = { | |
4701 | .notifier_call = vxlan_nexthop_event, | |
4702 | }; | |
4703 | ||
d342894c | 4704 | static __net_init int vxlan_init_net(struct net *net) |
4705 | { | |
4706 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
31fec5aa | 4707 | unsigned int h; |
d342894c | 4708 | |
553675fb | 4709 | INIT_LIST_HEAD(&vn->vxlan_list); |
1c51a915 | 4710 | spin_lock_init(&vn->sock_lock); |
d342894c | 4711 | |
553675fb | 4712 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
4713 | INIT_HLIST_HEAD(&vn->sock_list[h]); | |
d342894c | 4714 | |
c7cdbe2e | 4715 | return register_nexthop_notifier(net, &vxlan_nexthop_notifier_block); |
d342894c | 4716 | } |
4717 | ||
57b61127 | 4718 | static void vxlan_destroy_tunnels(struct net *net, struct list_head *head) |
f01ec1c0 ND |
4719 | { |
4720 | struct vxlan_net *vn = net_generic(net, vxlan_net_id); | |
4721 | struct vxlan_dev *vxlan, *next; | |
4722 | struct net_device *dev, *aux; | |
0e4ec5ac | 4723 | unsigned int h; |
f01ec1c0 | 4724 | |
f01ec1c0 ND |
4725 | for_each_netdev_safe(net, dev, aux) |
4726 | if (dev->rtnl_link_ops == &vxlan_link_ops) | |
57b61127 | 4727 | unregister_netdevice_queue(dev, head); |
f01ec1c0 ND |
4728 | |
4729 | list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { | |
4730 | /* If vxlan->dev is in the same netns, it has already been added | |
4731 | * to the list by the previous loop. | |
4732 | */ | |
cc4807bb | 4733 | if (!net_eq(dev_net(vxlan->dev), net)) |
57b61127 | 4734 | unregister_netdevice_queue(vxlan->dev, head); |
f01ec1c0 ND |
4735 | } |
4736 | ||
0e4ec5ac VA |
4737 | for (h = 0; h < PORT_HASH_SIZE; ++h) |
4738 | WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h])); | |
f01ec1c0 ND |
4739 | } |
4740 | ||
57b61127 HY |
4741 | static void __net_exit vxlan_exit_batch_net(struct list_head *net_list) |
4742 | { | |
4743 | struct net *net; | |
4744 | LIST_HEAD(list); | |
4745 | ||
4746 | rtnl_lock(); | |
c7cdbe2e RP |
4747 | list_for_each_entry(net, net_list, exit_list) |
4748 | unregister_nexthop_notifier(net, &vxlan_nexthop_notifier_block); | |
57b61127 HY |
4749 | list_for_each_entry(net, net_list, exit_list) |
4750 | vxlan_destroy_tunnels(net, &list); | |
4751 | ||
4752 | unregister_netdevice_many(&list); | |
4753 | rtnl_unlock(); | |
4754 | } | |
4755 | ||
d342894c | 4756 | static struct pernet_operations vxlan_net_ops = { |
4757 | .init = vxlan_init_net, | |
57b61127 | 4758 | .exit_batch = vxlan_exit_batch_net, |
d342894c | 4759 | .id = &vxlan_net_id, |
4760 | .size = sizeof(struct vxlan_net), | |
4761 | }; | |
4762 | ||
4763 | static int __init vxlan_init_module(void) | |
4764 | { | |
4765 | int rc; | |
4766 | ||
4767 | get_random_bytes(&vxlan_salt, sizeof(vxlan_salt)); | |
4768 | ||
783c1463 | 4769 | rc = register_pernet_subsys(&vxlan_net_ops); |
d342894c | 4770 | if (rc) |
4771 | goto out1; | |
4772 | ||
acaf4e70 | 4773 | rc = register_netdevice_notifier(&vxlan_notifier_block); |
d342894c | 4774 | if (rc) |
4775 | goto out2; | |
4776 | ||
0efe1173 | 4777 | rc = register_switchdev_notifier(&vxlan_switchdev_notifier_block); |
acaf4e70 DB |
4778 | if (rc) |
4779 | goto out3; | |
d342894c | 4780 | |
0efe1173 PM |
4781 | rc = rtnl_link_register(&vxlan_link_ops); |
4782 | if (rc) | |
4783 | goto out4; | |
4784 | ||
acaf4e70 | 4785 | return 0; |
0efe1173 PM |
4786 | out4: |
4787 | unregister_switchdev_notifier(&vxlan_switchdev_notifier_block); | |
acaf4e70 DB |
4788 | out3: |
4789 | unregister_netdevice_notifier(&vxlan_notifier_block); | |
d342894c | 4790 | out2: |
783c1463 | 4791 | unregister_pernet_subsys(&vxlan_net_ops); |
d342894c | 4792 | out1: |
4793 | return rc; | |
4794 | } | |
7332a13b | 4795 | late_initcall(vxlan_init_module); |
d342894c | 4796 | |
4797 | static void __exit vxlan_cleanup_module(void) | |
4798 | { | |
b7153984 | 4799 | rtnl_link_unregister(&vxlan_link_ops); |
0efe1173 | 4800 | unregister_switchdev_notifier(&vxlan_switchdev_notifier_block); |
acaf4e70 | 4801 | unregister_netdevice_notifier(&vxlan_notifier_block); |
783c1463 DB |
4802 | unregister_pernet_subsys(&vxlan_net_ops); |
4803 | /* rcu_barrier() is called by netns */ | |
d342894c | 4804 | } |
4805 | module_exit(vxlan_cleanup_module); | |
4806 | ||
4807 | MODULE_LICENSE("GPL"); | |
4808 | MODULE_VERSION(VXLAN_VERSION); | |
3b8df3c6 | 4809 | MODULE_AUTHOR("Stephen Hemminger <stephen@networkplumber.org>"); |
ead5139a | 4810 | MODULE_DESCRIPTION("Driver for VXLAN encapsulated traffic"); |
d342894c | 4811 | MODULE_ALIAS_RTNL_LINK("vxlan"); |