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Commit | Line | Data |
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e314dbdc PE |
1 | /* |
2 | * drivers/net/veth.c | |
3 | * | |
4 | * Copyright (C) 2007 OpenVZ http://openvz.org, SWsoft Inc | |
5 | * | |
6 | * Author: Pavel Emelianov <xemul@openvz.org> | |
7 | * Ethtool interface from: Eric W. Biederman <ebiederm@xmission.com> | |
8 | * | |
9 | */ | |
10 | ||
e314dbdc | 11 | #include <linux/netdevice.h> |
5a0e3ad6 | 12 | #include <linux/slab.h> |
e314dbdc PE |
13 | #include <linux/ethtool.h> |
14 | #include <linux/etherdevice.h> | |
cf05c700 | 15 | #include <linux/u64_stats_sync.h> |
e314dbdc | 16 | |
f7b12606 | 17 | #include <net/rtnetlink.h> |
e314dbdc PE |
18 | #include <net/dst.h> |
19 | #include <net/xfrm.h> | |
ecef969e | 20 | #include <linux/veth.h> |
9d9779e7 | 21 | #include <linux/module.h> |
e314dbdc PE |
22 | |
23 | #define DRV_NAME "veth" | |
24 | #define DRV_VERSION "1.0" | |
25 | ||
38d40815 EB |
26 | #define MIN_MTU 68 /* Min L3 MTU */ |
27 | #define MAX_MTU 65535 /* Max L3 MTU (arbitrary) */ | |
38d40815 | 28 | |
2681128f ED |
29 | struct pcpu_vstats { |
30 | u64 packets; | |
31 | u64 bytes; | |
cf05c700 | 32 | struct u64_stats_sync syncp; |
e314dbdc PE |
33 | }; |
34 | ||
35 | struct veth_priv { | |
d0e2c55e | 36 | struct net_device __rcu *peer; |
2681128f | 37 | atomic64_t dropped; |
e314dbdc PE |
38 | }; |
39 | ||
e314dbdc PE |
40 | /* |
41 | * ethtool interface | |
42 | */ | |
43 | ||
44 | static struct { | |
45 | const char string[ETH_GSTRING_LEN]; | |
46 | } ethtool_stats_keys[] = { | |
47 | { "peer_ifindex" }, | |
48 | }; | |
49 | ||
50 | static int veth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
51 | { | |
52 | cmd->supported = 0; | |
53 | cmd->advertising = 0; | |
70739497 | 54 | ethtool_cmd_speed_set(cmd, SPEED_10000); |
e314dbdc PE |
55 | cmd->duplex = DUPLEX_FULL; |
56 | cmd->port = PORT_TP; | |
57 | cmd->phy_address = 0; | |
58 | cmd->transceiver = XCVR_INTERNAL; | |
59 | cmd->autoneg = AUTONEG_DISABLE; | |
60 | cmd->maxtxpkt = 0; | |
61 | cmd->maxrxpkt = 0; | |
62 | return 0; | |
63 | } | |
64 | ||
65 | static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
66 | { | |
33a5ba14 RJ |
67 | strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); |
68 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); | |
e314dbdc PE |
69 | } |
70 | ||
71 | static void veth_get_strings(struct net_device *dev, u32 stringset, u8 *buf) | |
72 | { | |
73 | switch(stringset) { | |
74 | case ETH_SS_STATS: | |
75 | memcpy(buf, ðtool_stats_keys, sizeof(ethtool_stats_keys)); | |
76 | break; | |
77 | } | |
78 | } | |
79 | ||
b9f2c044 | 80 | static int veth_get_sset_count(struct net_device *dev, int sset) |
e314dbdc | 81 | { |
b9f2c044 JG |
82 | switch (sset) { |
83 | case ETH_SS_STATS: | |
84 | return ARRAY_SIZE(ethtool_stats_keys); | |
85 | default: | |
86 | return -EOPNOTSUPP; | |
87 | } | |
e314dbdc PE |
88 | } |
89 | ||
90 | static void veth_get_ethtool_stats(struct net_device *dev, | |
91 | struct ethtool_stats *stats, u64 *data) | |
92 | { | |
d0e2c55e ED |
93 | struct veth_priv *priv = netdev_priv(dev); |
94 | struct net_device *peer = rtnl_dereference(priv->peer); | |
e314dbdc | 95 | |
d0e2c55e | 96 | data[0] = peer ? peer->ifindex : 0; |
e314dbdc PE |
97 | } |
98 | ||
0fc0b732 | 99 | static const struct ethtool_ops veth_ethtool_ops = { |
e314dbdc PE |
100 | .get_settings = veth_get_settings, |
101 | .get_drvinfo = veth_get_drvinfo, | |
102 | .get_link = ethtool_op_get_link, | |
e314dbdc | 103 | .get_strings = veth_get_strings, |
b9f2c044 | 104 | .get_sset_count = veth_get_sset_count, |
e314dbdc PE |
105 | .get_ethtool_stats = veth_get_ethtool_stats, |
106 | }; | |
107 | ||
424efe9c | 108 | static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev) |
e314dbdc | 109 | { |
2681128f | 110 | struct veth_priv *priv = netdev_priv(dev); |
d0e2c55e | 111 | struct net_device *rcv; |
2681128f | 112 | int length = skb->len; |
e314dbdc | 113 | |
d0e2c55e ED |
114 | rcu_read_lock(); |
115 | rcv = rcu_dereference(priv->peer); | |
116 | if (unlikely(!rcv)) { | |
117 | kfree_skb(skb); | |
118 | goto drop; | |
119 | } | |
e314dbdc | 120 | |
2681128f ED |
121 | if (likely(dev_forward_skb(rcv, skb) == NET_RX_SUCCESS)) { |
122 | struct pcpu_vstats *stats = this_cpu_ptr(dev->vstats); | |
e314dbdc | 123 | |
2681128f ED |
124 | u64_stats_update_begin(&stats->syncp); |
125 | stats->bytes += length; | |
126 | stats->packets++; | |
127 | u64_stats_update_end(&stats->syncp); | |
128 | } else { | |
d0e2c55e | 129 | drop: |
2681128f ED |
130 | atomic64_inc(&priv->dropped); |
131 | } | |
d0e2c55e | 132 | rcu_read_unlock(); |
6ed10654 | 133 | return NETDEV_TX_OK; |
e314dbdc PE |
134 | } |
135 | ||
136 | /* | |
137 | * general routines | |
138 | */ | |
139 | ||
2681128f | 140 | static u64 veth_stats_one(struct pcpu_vstats *result, struct net_device *dev) |
e314dbdc | 141 | { |
cf05c700 | 142 | struct veth_priv *priv = netdev_priv(dev); |
11687a10 | 143 | int cpu; |
e314dbdc | 144 | |
2681128f ED |
145 | result->packets = 0; |
146 | result->bytes = 0; | |
2b1c8b0f | 147 | for_each_possible_cpu(cpu) { |
2681128f ED |
148 | struct pcpu_vstats *stats = per_cpu_ptr(dev->vstats, cpu); |
149 | u64 packets, bytes; | |
cf05c700 ED |
150 | unsigned int start; |
151 | ||
152 | do { | |
57a7744e | 153 | start = u64_stats_fetch_begin_irq(&stats->syncp); |
2681128f ED |
154 | packets = stats->packets; |
155 | bytes = stats->bytes; | |
57a7744e | 156 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); |
2681128f ED |
157 | result->packets += packets; |
158 | result->bytes += bytes; | |
11687a10 | 159 | } |
2681128f ED |
160 | return atomic64_read(&priv->dropped); |
161 | } | |
162 | ||
163 | static struct rtnl_link_stats64 *veth_get_stats64(struct net_device *dev, | |
164 | struct rtnl_link_stats64 *tot) | |
165 | { | |
166 | struct veth_priv *priv = netdev_priv(dev); | |
d0e2c55e | 167 | struct net_device *peer; |
2681128f ED |
168 | struct pcpu_vstats one; |
169 | ||
170 | tot->tx_dropped = veth_stats_one(&one, dev); | |
171 | tot->tx_bytes = one.bytes; | |
172 | tot->tx_packets = one.packets; | |
173 | ||
d0e2c55e ED |
174 | rcu_read_lock(); |
175 | peer = rcu_dereference(priv->peer); | |
176 | if (peer) { | |
177 | tot->rx_dropped = veth_stats_one(&one, peer); | |
178 | tot->rx_bytes = one.bytes; | |
179 | tot->rx_packets = one.packets; | |
180 | } | |
181 | rcu_read_unlock(); | |
6311cc44 | 182 | |
183 | return tot; | |
e314dbdc PE |
184 | } |
185 | ||
5c70ef85 G |
186 | /* fake multicast ability */ |
187 | static void veth_set_multicast_list(struct net_device *dev) | |
188 | { | |
189 | } | |
190 | ||
e314dbdc PE |
191 | static int veth_open(struct net_device *dev) |
192 | { | |
d0e2c55e ED |
193 | struct veth_priv *priv = netdev_priv(dev); |
194 | struct net_device *peer = rtnl_dereference(priv->peer); | |
e314dbdc | 195 | |
d0e2c55e | 196 | if (!peer) |
e314dbdc PE |
197 | return -ENOTCONN; |
198 | ||
d0e2c55e | 199 | if (peer->flags & IFF_UP) { |
e314dbdc | 200 | netif_carrier_on(dev); |
d0e2c55e | 201 | netif_carrier_on(peer); |
e314dbdc PE |
202 | } |
203 | return 0; | |
204 | } | |
205 | ||
2cf48a10 EB |
206 | static int veth_close(struct net_device *dev) |
207 | { | |
208 | struct veth_priv *priv = netdev_priv(dev); | |
2efd32ee | 209 | struct net_device *peer = rtnl_dereference(priv->peer); |
2cf48a10 EB |
210 | |
211 | netif_carrier_off(dev); | |
2efd32ee ED |
212 | if (peer) |
213 | netif_carrier_off(peer); | |
2cf48a10 EB |
214 | |
215 | return 0; | |
216 | } | |
217 | ||
38d40815 EB |
218 | static int is_valid_veth_mtu(int new_mtu) |
219 | { | |
807540ba | 220 | return new_mtu >= MIN_MTU && new_mtu <= MAX_MTU; |
38d40815 EB |
221 | } |
222 | ||
223 | static int veth_change_mtu(struct net_device *dev, int new_mtu) | |
224 | { | |
225 | if (!is_valid_veth_mtu(new_mtu)) | |
226 | return -EINVAL; | |
227 | dev->mtu = new_mtu; | |
228 | return 0; | |
229 | } | |
230 | ||
e314dbdc PE |
231 | static int veth_dev_init(struct net_device *dev) |
232 | { | |
1c213bd2 | 233 | dev->vstats = netdev_alloc_pcpu_stats(struct pcpu_vstats); |
2681128f | 234 | if (!dev->vstats) |
e314dbdc | 235 | return -ENOMEM; |
e314dbdc PE |
236 | return 0; |
237 | } | |
238 | ||
11687a10 DM |
239 | static void veth_dev_free(struct net_device *dev) |
240 | { | |
2681128f | 241 | free_percpu(dev->vstats); |
11687a10 DM |
242 | free_netdev(dev); |
243 | } | |
244 | ||
bb446c19 WC |
245 | #ifdef CONFIG_NET_POLL_CONTROLLER |
246 | static void veth_poll_controller(struct net_device *dev) | |
247 | { | |
248 | /* veth only receives frames when its peer sends one | |
249 | * Since it's a synchronous operation, we are guaranteed | |
250 | * never to have pending data when we poll for it so | |
251 | * there is nothing to do here. | |
252 | * | |
253 | * We need this though so netpoll recognizes us as an interface that | |
254 | * supports polling, which enables bridge devices in virt setups to | |
255 | * still use netconsole | |
256 | */ | |
257 | } | |
258 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
259 | ||
a45253bf ND |
260 | static int veth_get_iflink(const struct net_device *dev) |
261 | { | |
262 | struct veth_priv *priv = netdev_priv(dev); | |
263 | struct net_device *peer; | |
264 | int iflink; | |
265 | ||
266 | rcu_read_lock(); | |
267 | peer = rcu_dereference(priv->peer); | |
268 | iflink = peer ? peer->ifindex : 0; | |
269 | rcu_read_unlock(); | |
270 | ||
271 | return iflink; | |
272 | } | |
273 | ||
4456e7bd | 274 | static const struct net_device_ops veth_netdev_ops = { |
ee923623 DL |
275 | .ndo_init = veth_dev_init, |
276 | .ndo_open = veth_open, | |
2cf48a10 | 277 | .ndo_stop = veth_close, |
ee923623 | 278 | .ndo_start_xmit = veth_xmit, |
38d40815 | 279 | .ndo_change_mtu = veth_change_mtu, |
6311cc44 | 280 | .ndo_get_stats64 = veth_get_stats64, |
5c70ef85 | 281 | .ndo_set_rx_mode = veth_set_multicast_list, |
ee923623 | 282 | .ndo_set_mac_address = eth_mac_addr, |
bb446c19 WC |
283 | #ifdef CONFIG_NET_POLL_CONTROLLER |
284 | .ndo_poll_controller = veth_poll_controller, | |
285 | #endif | |
a45253bf | 286 | .ndo_get_iflink = veth_get_iflink, |
1a04a821 | 287 | .ndo_features_check = passthru_features_check, |
4456e7bd SH |
288 | }; |
289 | ||
8093315a ED |
290 | #define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ |
291 | NETIF_F_HW_CSUM | NETIF_F_RXCSUM | NETIF_F_HIGHDMA | \ | |
82d81898 ED |
292 | NETIF_F_GSO_GRE | NETIF_F_GSO_UDP_TUNNEL | \ |
293 | NETIF_F_GSO_IPIP | NETIF_F_GSO_SIT | NETIF_F_UFO | \ | |
28d2b136 PM |
294 | NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | \ |
295 | NETIF_F_HW_VLAN_STAG_TX | NETIF_F_HW_VLAN_STAG_RX ) | |
8093315a | 296 | |
e314dbdc PE |
297 | static void veth_setup(struct net_device *dev) |
298 | { | |
299 | ether_setup(dev); | |
300 | ||
550fd08c | 301 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
23ea5a96 | 302 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
02f01ec1 | 303 | dev->priv_flags |= IFF_NO_QUEUE; |
550fd08c | 304 | |
4456e7bd | 305 | dev->netdev_ops = &veth_netdev_ops; |
e314dbdc PE |
306 | dev->ethtool_ops = &veth_ethtool_ops; |
307 | dev->features |= NETIF_F_LLTX; | |
8093315a | 308 | dev->features |= VETH_FEATURES; |
8d0d21f4 | 309 | dev->vlan_features = dev->features & |
3f8c707b VY |
310 | ~(NETIF_F_HW_VLAN_CTAG_TX | |
311 | NETIF_F_HW_VLAN_STAG_TX | | |
312 | NETIF_F_HW_VLAN_CTAG_RX | | |
313 | NETIF_F_HW_VLAN_STAG_RX); | |
11687a10 | 314 | dev->destructor = veth_dev_free; |
a2c725fa | 315 | |
8093315a | 316 | dev->hw_features = VETH_FEATURES; |
82d81898 | 317 | dev->hw_enc_features = VETH_FEATURES; |
e314dbdc PE |
318 | } |
319 | ||
320 | /* | |
321 | * netlink interface | |
322 | */ | |
323 | ||
324 | static int veth_validate(struct nlattr *tb[], struct nlattr *data[]) | |
325 | { | |
326 | if (tb[IFLA_ADDRESS]) { | |
327 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
328 | return -EINVAL; | |
329 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
330 | return -EADDRNOTAVAIL; | |
331 | } | |
38d40815 EB |
332 | if (tb[IFLA_MTU]) { |
333 | if (!is_valid_veth_mtu(nla_get_u32(tb[IFLA_MTU]))) | |
334 | return -EINVAL; | |
335 | } | |
e314dbdc PE |
336 | return 0; |
337 | } | |
338 | ||
339 | static struct rtnl_link_ops veth_link_ops; | |
340 | ||
81adee47 | 341 | static int veth_newlink(struct net *src_net, struct net_device *dev, |
e314dbdc PE |
342 | struct nlattr *tb[], struct nlattr *data[]) |
343 | { | |
344 | int err; | |
345 | struct net_device *peer; | |
346 | struct veth_priv *priv; | |
347 | char ifname[IFNAMSIZ]; | |
348 | struct nlattr *peer_tb[IFLA_MAX + 1], **tbp; | |
5517750f | 349 | unsigned char name_assign_type; |
3729d502 | 350 | struct ifinfomsg *ifmp; |
81adee47 | 351 | struct net *net; |
e314dbdc PE |
352 | |
353 | /* | |
354 | * create and register peer first | |
e314dbdc | 355 | */ |
e314dbdc PE |
356 | if (data != NULL && data[VETH_INFO_PEER] != NULL) { |
357 | struct nlattr *nla_peer; | |
358 | ||
359 | nla_peer = data[VETH_INFO_PEER]; | |
3729d502 | 360 | ifmp = nla_data(nla_peer); |
f7b12606 JP |
361 | err = rtnl_nla_parse_ifla(peer_tb, |
362 | nla_data(nla_peer) + sizeof(struct ifinfomsg), | |
363 | nla_len(nla_peer) - sizeof(struct ifinfomsg)); | |
e314dbdc PE |
364 | if (err < 0) |
365 | return err; | |
366 | ||
367 | err = veth_validate(peer_tb, NULL); | |
368 | if (err < 0) | |
369 | return err; | |
370 | ||
371 | tbp = peer_tb; | |
3729d502 PM |
372 | } else { |
373 | ifmp = NULL; | |
e314dbdc | 374 | tbp = tb; |
3729d502 | 375 | } |
e314dbdc | 376 | |
5517750f | 377 | if (tbp[IFLA_IFNAME]) { |
e314dbdc | 378 | nla_strlcpy(ifname, tbp[IFLA_IFNAME], IFNAMSIZ); |
5517750f TG |
379 | name_assign_type = NET_NAME_USER; |
380 | } else { | |
e314dbdc | 381 | snprintf(ifname, IFNAMSIZ, DRV_NAME "%%d"); |
5517750f TG |
382 | name_assign_type = NET_NAME_ENUM; |
383 | } | |
e314dbdc | 384 | |
81adee47 EB |
385 | net = rtnl_link_get_net(src_net, tbp); |
386 | if (IS_ERR(net)) | |
387 | return PTR_ERR(net); | |
388 | ||
5517750f TG |
389 | peer = rtnl_create_link(net, ifname, name_assign_type, |
390 | &veth_link_ops, tbp); | |
81adee47 EB |
391 | if (IS_ERR(peer)) { |
392 | put_net(net); | |
e314dbdc | 393 | return PTR_ERR(peer); |
81adee47 | 394 | } |
e314dbdc PE |
395 | |
396 | if (tbp[IFLA_ADDRESS] == NULL) | |
f2cedb63 | 397 | eth_hw_addr_random(peer); |
e6f8f1a7 PE |
398 | |
399 | if (ifmp && (dev->ifindex != 0)) | |
400 | peer->ifindex = ifmp->ifi_index; | |
e314dbdc PE |
401 | |
402 | err = register_netdevice(peer); | |
81adee47 EB |
403 | put_net(net); |
404 | net = NULL; | |
e314dbdc PE |
405 | if (err < 0) |
406 | goto err_register_peer; | |
407 | ||
408 | netif_carrier_off(peer); | |
409 | ||
3729d502 PM |
410 | err = rtnl_configure_link(peer, ifmp); |
411 | if (err < 0) | |
412 | goto err_configure_peer; | |
413 | ||
e314dbdc PE |
414 | /* |
415 | * register dev last | |
416 | * | |
417 | * note, that since we've registered new device the dev's name | |
418 | * should be re-allocated | |
419 | */ | |
420 | ||
421 | if (tb[IFLA_ADDRESS] == NULL) | |
f2cedb63 | 422 | eth_hw_addr_random(dev); |
e314dbdc | 423 | |
6c8c4446 JP |
424 | if (tb[IFLA_IFNAME]) |
425 | nla_strlcpy(dev->name, tb[IFLA_IFNAME], IFNAMSIZ); | |
426 | else | |
427 | snprintf(dev->name, IFNAMSIZ, DRV_NAME "%%d"); | |
428 | ||
e314dbdc PE |
429 | err = register_netdevice(dev); |
430 | if (err < 0) | |
431 | goto err_register_dev; | |
432 | ||
433 | netif_carrier_off(dev); | |
434 | ||
435 | /* | |
436 | * tie the deviced together | |
437 | */ | |
438 | ||
439 | priv = netdev_priv(dev); | |
d0e2c55e | 440 | rcu_assign_pointer(priv->peer, peer); |
e314dbdc PE |
441 | |
442 | priv = netdev_priv(peer); | |
d0e2c55e | 443 | rcu_assign_pointer(priv->peer, dev); |
e314dbdc PE |
444 | return 0; |
445 | ||
446 | err_register_dev: | |
447 | /* nothing to do */ | |
3729d502 | 448 | err_configure_peer: |
e314dbdc PE |
449 | unregister_netdevice(peer); |
450 | return err; | |
451 | ||
452 | err_register_peer: | |
453 | free_netdev(peer); | |
454 | return err; | |
455 | } | |
456 | ||
23289a37 | 457 | static void veth_dellink(struct net_device *dev, struct list_head *head) |
e314dbdc PE |
458 | { |
459 | struct veth_priv *priv; | |
460 | struct net_device *peer; | |
461 | ||
462 | priv = netdev_priv(dev); | |
d0e2c55e ED |
463 | peer = rtnl_dereference(priv->peer); |
464 | ||
465 | /* Note : dellink() is called from default_device_exit_batch(), | |
466 | * before a rcu_synchronize() point. The devices are guaranteed | |
467 | * not being freed before one RCU grace period. | |
468 | */ | |
469 | RCU_INIT_POINTER(priv->peer, NULL); | |
24540535 | 470 | unregister_netdevice_queue(dev, head); |
f45a5c26 ED |
471 | |
472 | if (peer) { | |
473 | priv = netdev_priv(peer); | |
474 | RCU_INIT_POINTER(priv->peer, NULL); | |
475 | unregister_netdevice_queue(peer, head); | |
476 | } | |
e314dbdc PE |
477 | } |
478 | ||
23711438 TG |
479 | static const struct nla_policy veth_policy[VETH_INFO_MAX + 1] = { |
480 | [VETH_INFO_PEER] = { .len = sizeof(struct ifinfomsg) }, | |
481 | }; | |
e314dbdc | 482 | |
e5f4e7b9 ND |
483 | static struct net *veth_get_link_net(const struct net_device *dev) |
484 | { | |
485 | struct veth_priv *priv = netdev_priv(dev); | |
486 | struct net_device *peer = rtnl_dereference(priv->peer); | |
487 | ||
488 | return peer ? dev_net(peer) : dev_net(dev); | |
489 | } | |
490 | ||
e314dbdc PE |
491 | static struct rtnl_link_ops veth_link_ops = { |
492 | .kind = DRV_NAME, | |
493 | .priv_size = sizeof(struct veth_priv), | |
494 | .setup = veth_setup, | |
495 | .validate = veth_validate, | |
496 | .newlink = veth_newlink, | |
497 | .dellink = veth_dellink, | |
498 | .policy = veth_policy, | |
499 | .maxtype = VETH_INFO_MAX, | |
e5f4e7b9 | 500 | .get_link_net = veth_get_link_net, |
e314dbdc PE |
501 | }; |
502 | ||
503 | /* | |
504 | * init/fini | |
505 | */ | |
506 | ||
507 | static __init int veth_init(void) | |
508 | { | |
509 | return rtnl_link_register(&veth_link_ops); | |
510 | } | |
511 | ||
512 | static __exit void veth_exit(void) | |
513 | { | |
68365458 | 514 | rtnl_link_unregister(&veth_link_ops); |
e314dbdc PE |
515 | } |
516 | ||
517 | module_init(veth_init); | |
518 | module_exit(veth_exit); | |
519 | ||
520 | MODULE_DESCRIPTION("Virtual Ethernet Tunnel"); | |
521 | MODULE_LICENSE("GPL v2"); | |
522 | MODULE_ALIAS_RTNL_LINK(DRV_NAME); |