Commit | Line | Data |
---|---|---|
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 | } | |
0b796750 | 120 | /* don't change ip_summed == CHECKSUM_PARTIAL, as that |
2681128f ED |
121 | * will cause bad checksum on forwarded packets |
122 | */ | |
a2c725fa MM |
123 | if (skb->ip_summed == CHECKSUM_NONE && |
124 | rcv->features & NETIF_F_RXCSUM) | |
125 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
e314dbdc | 126 | |
2681128f ED |
127 | if (likely(dev_forward_skb(rcv, skb) == NET_RX_SUCCESS)) { |
128 | struct pcpu_vstats *stats = this_cpu_ptr(dev->vstats); | |
e314dbdc | 129 | |
2681128f ED |
130 | u64_stats_update_begin(&stats->syncp); |
131 | stats->bytes += length; | |
132 | stats->packets++; | |
133 | u64_stats_update_end(&stats->syncp); | |
134 | } else { | |
d0e2c55e | 135 | drop: |
2681128f ED |
136 | atomic64_inc(&priv->dropped); |
137 | } | |
d0e2c55e | 138 | rcu_read_unlock(); |
6ed10654 | 139 | return NETDEV_TX_OK; |
e314dbdc PE |
140 | } |
141 | ||
142 | /* | |
143 | * general routines | |
144 | */ | |
145 | ||
2681128f | 146 | static u64 veth_stats_one(struct pcpu_vstats *result, struct net_device *dev) |
e314dbdc | 147 | { |
cf05c700 | 148 | struct veth_priv *priv = netdev_priv(dev); |
11687a10 | 149 | int cpu; |
e314dbdc | 150 | |
2681128f ED |
151 | result->packets = 0; |
152 | result->bytes = 0; | |
2b1c8b0f | 153 | for_each_possible_cpu(cpu) { |
2681128f ED |
154 | struct pcpu_vstats *stats = per_cpu_ptr(dev->vstats, cpu); |
155 | u64 packets, bytes; | |
cf05c700 ED |
156 | unsigned int start; |
157 | ||
158 | do { | |
57a7744e | 159 | start = u64_stats_fetch_begin_irq(&stats->syncp); |
2681128f ED |
160 | packets = stats->packets; |
161 | bytes = stats->bytes; | |
57a7744e | 162 | } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); |
2681128f ED |
163 | result->packets += packets; |
164 | result->bytes += bytes; | |
11687a10 | 165 | } |
2681128f ED |
166 | return atomic64_read(&priv->dropped); |
167 | } | |
168 | ||
169 | static struct rtnl_link_stats64 *veth_get_stats64(struct net_device *dev, | |
170 | struct rtnl_link_stats64 *tot) | |
171 | { | |
172 | struct veth_priv *priv = netdev_priv(dev); | |
d0e2c55e | 173 | struct net_device *peer; |
2681128f ED |
174 | struct pcpu_vstats one; |
175 | ||
176 | tot->tx_dropped = veth_stats_one(&one, dev); | |
177 | tot->tx_bytes = one.bytes; | |
178 | tot->tx_packets = one.packets; | |
179 | ||
d0e2c55e ED |
180 | rcu_read_lock(); |
181 | peer = rcu_dereference(priv->peer); | |
182 | if (peer) { | |
183 | tot->rx_dropped = veth_stats_one(&one, peer); | |
184 | tot->rx_bytes = one.bytes; | |
185 | tot->rx_packets = one.packets; | |
186 | } | |
187 | rcu_read_unlock(); | |
6311cc44 | 188 | |
189 | return tot; | |
e314dbdc PE |
190 | } |
191 | ||
5c70ef85 G |
192 | /* fake multicast ability */ |
193 | static void veth_set_multicast_list(struct net_device *dev) | |
194 | { | |
195 | } | |
196 | ||
e314dbdc PE |
197 | static int veth_open(struct net_device *dev) |
198 | { | |
d0e2c55e ED |
199 | struct veth_priv *priv = netdev_priv(dev); |
200 | struct net_device *peer = rtnl_dereference(priv->peer); | |
e314dbdc | 201 | |
d0e2c55e | 202 | if (!peer) |
e314dbdc PE |
203 | return -ENOTCONN; |
204 | ||
d0e2c55e | 205 | if (peer->flags & IFF_UP) { |
e314dbdc | 206 | netif_carrier_on(dev); |
d0e2c55e | 207 | netif_carrier_on(peer); |
e314dbdc PE |
208 | } |
209 | return 0; | |
210 | } | |
211 | ||
2cf48a10 EB |
212 | static int veth_close(struct net_device *dev) |
213 | { | |
214 | struct veth_priv *priv = netdev_priv(dev); | |
2efd32ee | 215 | struct net_device *peer = rtnl_dereference(priv->peer); |
2cf48a10 EB |
216 | |
217 | netif_carrier_off(dev); | |
2efd32ee ED |
218 | if (peer) |
219 | netif_carrier_off(peer); | |
2cf48a10 EB |
220 | |
221 | return 0; | |
222 | } | |
223 | ||
38d40815 EB |
224 | static int is_valid_veth_mtu(int new_mtu) |
225 | { | |
807540ba | 226 | return new_mtu >= MIN_MTU && new_mtu <= MAX_MTU; |
38d40815 EB |
227 | } |
228 | ||
229 | static int veth_change_mtu(struct net_device *dev, int new_mtu) | |
230 | { | |
231 | if (!is_valid_veth_mtu(new_mtu)) | |
232 | return -EINVAL; | |
233 | dev->mtu = new_mtu; | |
234 | return 0; | |
235 | } | |
236 | ||
e314dbdc PE |
237 | static int veth_dev_init(struct net_device *dev) |
238 | { | |
1c213bd2 | 239 | dev->vstats = netdev_alloc_pcpu_stats(struct pcpu_vstats); |
2681128f | 240 | if (!dev->vstats) |
e314dbdc | 241 | return -ENOMEM; |
e314dbdc PE |
242 | return 0; |
243 | } | |
244 | ||
11687a10 DM |
245 | static void veth_dev_free(struct net_device *dev) |
246 | { | |
2681128f | 247 | free_percpu(dev->vstats); |
11687a10 DM |
248 | free_netdev(dev); |
249 | } | |
250 | ||
bb446c19 WC |
251 | #ifdef CONFIG_NET_POLL_CONTROLLER |
252 | static void veth_poll_controller(struct net_device *dev) | |
253 | { | |
254 | /* veth only receives frames when its peer sends one | |
255 | * Since it's a synchronous operation, we are guaranteed | |
256 | * never to have pending data when we poll for it so | |
257 | * there is nothing to do here. | |
258 | * | |
259 | * We need this though so netpoll recognizes us as an interface that | |
260 | * supports polling, which enables bridge devices in virt setups to | |
261 | * still use netconsole | |
262 | */ | |
263 | } | |
264 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
265 | ||
4456e7bd | 266 | static const struct net_device_ops veth_netdev_ops = { |
ee923623 DL |
267 | .ndo_init = veth_dev_init, |
268 | .ndo_open = veth_open, | |
2cf48a10 | 269 | .ndo_stop = veth_close, |
ee923623 | 270 | .ndo_start_xmit = veth_xmit, |
38d40815 | 271 | .ndo_change_mtu = veth_change_mtu, |
6311cc44 | 272 | .ndo_get_stats64 = veth_get_stats64, |
5c70ef85 | 273 | .ndo_set_rx_mode = veth_set_multicast_list, |
ee923623 | 274 | .ndo_set_mac_address = eth_mac_addr, |
bb446c19 WC |
275 | #ifdef CONFIG_NET_POLL_CONTROLLER |
276 | .ndo_poll_controller = veth_poll_controller, | |
277 | #endif | |
4456e7bd SH |
278 | }; |
279 | ||
8093315a ED |
280 | #define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ |
281 | NETIF_F_HW_CSUM | NETIF_F_RXCSUM | NETIF_F_HIGHDMA | \ | |
82d81898 ED |
282 | NETIF_F_GSO_GRE | NETIF_F_GSO_UDP_TUNNEL | \ |
283 | NETIF_F_GSO_IPIP | NETIF_F_GSO_SIT | NETIF_F_UFO | \ | |
28d2b136 PM |
284 | NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | \ |
285 | NETIF_F_HW_VLAN_STAG_TX | NETIF_F_HW_VLAN_STAG_RX ) | |
8093315a | 286 | |
e314dbdc PE |
287 | static void veth_setup(struct net_device *dev) |
288 | { | |
289 | ether_setup(dev); | |
290 | ||
550fd08c | 291 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
23ea5a96 | 292 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
550fd08c | 293 | |
4456e7bd | 294 | dev->netdev_ops = &veth_netdev_ops; |
e314dbdc PE |
295 | dev->ethtool_ops = &veth_ethtool_ops; |
296 | dev->features |= NETIF_F_LLTX; | |
8093315a | 297 | dev->features |= VETH_FEATURES; |
8d0d21f4 | 298 | dev->vlan_features = dev->features & |
3f8c707b VY |
299 | ~(NETIF_F_HW_VLAN_CTAG_TX | |
300 | NETIF_F_HW_VLAN_STAG_TX | | |
301 | NETIF_F_HW_VLAN_CTAG_RX | | |
302 | NETIF_F_HW_VLAN_STAG_RX); | |
11687a10 | 303 | dev->destructor = veth_dev_free; |
a2c725fa | 304 | |
8093315a | 305 | dev->hw_features = VETH_FEATURES; |
82d81898 | 306 | dev->hw_enc_features = VETH_FEATURES; |
e314dbdc PE |
307 | } |
308 | ||
309 | /* | |
310 | * netlink interface | |
311 | */ | |
312 | ||
313 | static int veth_validate(struct nlattr *tb[], struct nlattr *data[]) | |
314 | { | |
315 | if (tb[IFLA_ADDRESS]) { | |
316 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
317 | return -EINVAL; | |
318 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
319 | return -EADDRNOTAVAIL; | |
320 | } | |
38d40815 EB |
321 | if (tb[IFLA_MTU]) { |
322 | if (!is_valid_veth_mtu(nla_get_u32(tb[IFLA_MTU]))) | |
323 | return -EINVAL; | |
324 | } | |
e314dbdc PE |
325 | return 0; |
326 | } | |
327 | ||
328 | static struct rtnl_link_ops veth_link_ops; | |
329 | ||
81adee47 | 330 | static int veth_newlink(struct net *src_net, struct net_device *dev, |
e314dbdc PE |
331 | struct nlattr *tb[], struct nlattr *data[]) |
332 | { | |
333 | int err; | |
334 | struct net_device *peer; | |
335 | struct veth_priv *priv; | |
336 | char ifname[IFNAMSIZ]; | |
337 | struct nlattr *peer_tb[IFLA_MAX + 1], **tbp; | |
5517750f | 338 | unsigned char name_assign_type; |
3729d502 | 339 | struct ifinfomsg *ifmp; |
81adee47 | 340 | struct net *net; |
e314dbdc PE |
341 | |
342 | /* | |
343 | * create and register peer first | |
e314dbdc | 344 | */ |
e314dbdc PE |
345 | if (data != NULL && data[VETH_INFO_PEER] != NULL) { |
346 | struct nlattr *nla_peer; | |
347 | ||
348 | nla_peer = data[VETH_INFO_PEER]; | |
3729d502 | 349 | ifmp = nla_data(nla_peer); |
f7b12606 JP |
350 | err = rtnl_nla_parse_ifla(peer_tb, |
351 | nla_data(nla_peer) + sizeof(struct ifinfomsg), | |
352 | nla_len(nla_peer) - sizeof(struct ifinfomsg)); | |
e314dbdc PE |
353 | if (err < 0) |
354 | return err; | |
355 | ||
356 | err = veth_validate(peer_tb, NULL); | |
357 | if (err < 0) | |
358 | return err; | |
359 | ||
360 | tbp = peer_tb; | |
3729d502 PM |
361 | } else { |
362 | ifmp = NULL; | |
e314dbdc | 363 | tbp = tb; |
3729d502 | 364 | } |
e314dbdc | 365 | |
5517750f | 366 | if (tbp[IFLA_IFNAME]) { |
e314dbdc | 367 | nla_strlcpy(ifname, tbp[IFLA_IFNAME], IFNAMSIZ); |
5517750f TG |
368 | name_assign_type = NET_NAME_USER; |
369 | } else { | |
e314dbdc | 370 | snprintf(ifname, IFNAMSIZ, DRV_NAME "%%d"); |
5517750f TG |
371 | name_assign_type = NET_NAME_ENUM; |
372 | } | |
e314dbdc | 373 | |
81adee47 EB |
374 | net = rtnl_link_get_net(src_net, tbp); |
375 | if (IS_ERR(net)) | |
376 | return PTR_ERR(net); | |
377 | ||
5517750f TG |
378 | peer = rtnl_create_link(net, ifname, name_assign_type, |
379 | &veth_link_ops, tbp); | |
81adee47 EB |
380 | if (IS_ERR(peer)) { |
381 | put_net(net); | |
e314dbdc | 382 | return PTR_ERR(peer); |
81adee47 | 383 | } |
e314dbdc PE |
384 | |
385 | if (tbp[IFLA_ADDRESS] == NULL) | |
f2cedb63 | 386 | eth_hw_addr_random(peer); |
e6f8f1a7 PE |
387 | |
388 | if (ifmp && (dev->ifindex != 0)) | |
389 | peer->ifindex = ifmp->ifi_index; | |
e314dbdc PE |
390 | |
391 | err = register_netdevice(peer); | |
81adee47 EB |
392 | put_net(net); |
393 | net = NULL; | |
e314dbdc PE |
394 | if (err < 0) |
395 | goto err_register_peer; | |
396 | ||
397 | netif_carrier_off(peer); | |
398 | ||
3729d502 PM |
399 | err = rtnl_configure_link(peer, ifmp); |
400 | if (err < 0) | |
401 | goto err_configure_peer; | |
402 | ||
e314dbdc PE |
403 | /* |
404 | * register dev last | |
405 | * | |
406 | * note, that since we've registered new device the dev's name | |
407 | * should be re-allocated | |
408 | */ | |
409 | ||
410 | if (tb[IFLA_ADDRESS] == NULL) | |
f2cedb63 | 411 | eth_hw_addr_random(dev); |
e314dbdc | 412 | |
6c8c4446 JP |
413 | if (tb[IFLA_IFNAME]) |
414 | nla_strlcpy(dev->name, tb[IFLA_IFNAME], IFNAMSIZ); | |
415 | else | |
416 | snprintf(dev->name, IFNAMSIZ, DRV_NAME "%%d"); | |
417 | ||
e314dbdc PE |
418 | err = register_netdevice(dev); |
419 | if (err < 0) | |
420 | goto err_register_dev; | |
421 | ||
422 | netif_carrier_off(dev); | |
423 | ||
424 | /* | |
425 | * tie the deviced together | |
426 | */ | |
427 | ||
428 | priv = netdev_priv(dev); | |
d0e2c55e | 429 | rcu_assign_pointer(priv->peer, peer); |
e314dbdc PE |
430 | |
431 | priv = netdev_priv(peer); | |
d0e2c55e | 432 | rcu_assign_pointer(priv->peer, dev); |
e314dbdc PE |
433 | return 0; |
434 | ||
435 | err_register_dev: | |
436 | /* nothing to do */ | |
3729d502 | 437 | err_configure_peer: |
e314dbdc PE |
438 | unregister_netdevice(peer); |
439 | return err; | |
440 | ||
441 | err_register_peer: | |
442 | free_netdev(peer); | |
443 | return err; | |
444 | } | |
445 | ||
23289a37 | 446 | static void veth_dellink(struct net_device *dev, struct list_head *head) |
e314dbdc PE |
447 | { |
448 | struct veth_priv *priv; | |
449 | struct net_device *peer; | |
450 | ||
451 | priv = netdev_priv(dev); | |
d0e2c55e ED |
452 | peer = rtnl_dereference(priv->peer); |
453 | ||
454 | /* Note : dellink() is called from default_device_exit_batch(), | |
455 | * before a rcu_synchronize() point. The devices are guaranteed | |
456 | * not being freed before one RCU grace period. | |
457 | */ | |
458 | RCU_INIT_POINTER(priv->peer, NULL); | |
24540535 | 459 | unregister_netdevice_queue(dev, head); |
f45a5c26 ED |
460 | |
461 | if (peer) { | |
462 | priv = netdev_priv(peer); | |
463 | RCU_INIT_POINTER(priv->peer, NULL); | |
464 | unregister_netdevice_queue(peer, head); | |
465 | } | |
e314dbdc PE |
466 | } |
467 | ||
23711438 TG |
468 | static const struct nla_policy veth_policy[VETH_INFO_MAX + 1] = { |
469 | [VETH_INFO_PEER] = { .len = sizeof(struct ifinfomsg) }, | |
470 | }; | |
e314dbdc | 471 | |
e5f4e7b9 ND |
472 | static struct net *veth_get_link_net(const struct net_device *dev) |
473 | { | |
474 | struct veth_priv *priv = netdev_priv(dev); | |
475 | struct net_device *peer = rtnl_dereference(priv->peer); | |
476 | ||
477 | return peer ? dev_net(peer) : dev_net(dev); | |
478 | } | |
479 | ||
e314dbdc PE |
480 | static struct rtnl_link_ops veth_link_ops = { |
481 | .kind = DRV_NAME, | |
482 | .priv_size = sizeof(struct veth_priv), | |
483 | .setup = veth_setup, | |
484 | .validate = veth_validate, | |
485 | .newlink = veth_newlink, | |
486 | .dellink = veth_dellink, | |
487 | .policy = veth_policy, | |
488 | .maxtype = VETH_INFO_MAX, | |
e5f4e7b9 | 489 | .get_link_net = veth_get_link_net, |
e314dbdc PE |
490 | }; |
491 | ||
492 | /* | |
493 | * init/fini | |
494 | */ | |
495 | ||
496 | static __init int veth_init(void) | |
497 | { | |
498 | return rtnl_link_register(&veth_link_ops); | |
499 | } | |
500 | ||
501 | static __exit void veth_exit(void) | |
502 | { | |
68365458 | 503 | rtnl_link_unregister(&veth_link_ops); |
e314dbdc PE |
504 | } |
505 | ||
506 | module_init(veth_init); | |
507 | module_exit(veth_exit); | |
508 | ||
509 | MODULE_DESCRIPTION("Virtual Ethernet Tunnel"); | |
510 | MODULE_LICENSE("GPL v2"); | |
511 | MODULE_ALIAS_RTNL_LINK(DRV_NAME); |