Commit | Line | Data |
---|---|---|
b863ceb7 PM |
1 | /* |
2 | * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License as | |
6 | * published by the Free Software Foundation; either version 2 of | |
7 | * the License, or (at your option) any later version. | |
8 | * | |
9 | * The code this is based on carried the following copyright notice: | |
10 | * --- | |
11 | * (C) Copyright 2001-2006 | |
12 | * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com | |
13 | * Re-worked by Ben Greear <greearb@candelatech.com> | |
14 | * --- | |
15 | */ | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/string.h> | |
82524746 | 23 | #include <linux/rculist.h> |
b863ceb7 PM |
24 | #include <linux/notifier.h> |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/ethtool.h> | |
28 | #include <linux/if_arp.h> | |
29 | #include <linux/if_link.h> | |
30 | #include <linux/if_macvlan.h> | |
31 | #include <net/rtnetlink.h> | |
32 | ||
33 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) | |
34 | ||
35 | struct macvlan_port { | |
36 | struct net_device *dev; | |
37 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
38 | struct list_head vlans; | |
39 | }; | |
40 | ||
41 | struct macvlan_dev { | |
42 | struct net_device *dev; | |
43 | struct list_head list; | |
44 | struct hlist_node hlist; | |
45 | struct macvlan_port *port; | |
46 | struct net_device *lowerdev; | |
47 | }; | |
48 | ||
49 | ||
50 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, | |
51 | const unsigned char *addr) | |
52 | { | |
53 | struct macvlan_dev *vlan; | |
54 | struct hlist_node *n; | |
55 | ||
56 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { | |
57 | if (!compare_ether_addr(vlan->dev->dev_addr, addr)) | |
58 | return vlan; | |
59 | } | |
60 | return NULL; | |
61 | } | |
62 | ||
63 | static void macvlan_broadcast(struct sk_buff *skb, | |
64 | const struct macvlan_port *port) | |
65 | { | |
66 | const struct ethhdr *eth = eth_hdr(skb); | |
67 | const struct macvlan_dev *vlan; | |
68 | struct hlist_node *n; | |
69 | struct net_device *dev; | |
70 | struct sk_buff *nskb; | |
71 | unsigned int i; | |
72 | ||
efbbced3 PM |
73 | if (skb->protocol == htons(ETH_P_PAUSE)) |
74 | return; | |
75 | ||
b863ceb7 PM |
76 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
77 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { | |
78 | dev = vlan->dev; | |
b863ceb7 PM |
79 | |
80 | nskb = skb_clone(skb, GFP_ATOMIC); | |
81 | if (nskb == NULL) { | |
82 | dev->stats.rx_errors++; | |
83 | dev->stats.rx_dropped++; | |
84 | continue; | |
85 | } | |
86 | ||
87 | dev->stats.rx_bytes += skb->len + ETH_HLEN; | |
88 | dev->stats.rx_packets++; | |
89 | dev->stats.multicast++; | |
b863ceb7 PM |
90 | |
91 | nskb->dev = dev; | |
92 | if (!compare_ether_addr(eth->h_dest, dev->broadcast)) | |
93 | nskb->pkt_type = PACKET_BROADCAST; | |
94 | else | |
95 | nskb->pkt_type = PACKET_MULTICAST; | |
96 | ||
97 | netif_rx(nskb); | |
98 | } | |
99 | } | |
100 | } | |
101 | ||
102 | /* called under rcu_read_lock() from netif_receive_skb */ | |
103 | static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb) | |
104 | { | |
105 | const struct ethhdr *eth = eth_hdr(skb); | |
106 | const struct macvlan_port *port; | |
107 | const struct macvlan_dev *vlan; | |
108 | struct net_device *dev; | |
109 | ||
110 | port = rcu_dereference(skb->dev->macvlan_port); | |
111 | if (port == NULL) | |
112 | return skb; | |
113 | ||
114 | if (is_multicast_ether_addr(eth->h_dest)) { | |
115 | macvlan_broadcast(skb, port); | |
116 | return skb; | |
117 | } | |
118 | ||
119 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
120 | if (vlan == NULL) | |
121 | return skb; | |
122 | ||
123 | dev = vlan->dev; | |
124 | if (unlikely(!(dev->flags & IFF_UP))) { | |
125 | kfree_skb(skb); | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | skb = skb_share_check(skb, GFP_ATOMIC); | |
130 | if (skb == NULL) { | |
131 | dev->stats.rx_errors++; | |
132 | dev->stats.rx_dropped++; | |
133 | return NULL; | |
134 | } | |
135 | ||
136 | dev->stats.rx_bytes += skb->len + ETH_HLEN; | |
137 | dev->stats.rx_packets++; | |
b863ceb7 PM |
138 | |
139 | skb->dev = dev; | |
140 | skb->pkt_type = PACKET_HOST; | |
141 | ||
142 | netif_rx(skb); | |
143 | return NULL; | |
144 | } | |
145 | ||
00829823 | 146 | static int macvlan_start_xmit(struct sk_buff *skb, struct net_device *dev) |
b863ceb7 PM |
147 | { |
148 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
149 | unsigned int len = skb->len; | |
150 | int ret; | |
151 | ||
152 | skb->dev = vlan->lowerdev; | |
153 | ret = dev_queue_xmit(skb); | |
154 | ||
155 | if (likely(ret == NET_XMIT_SUCCESS)) { | |
156 | dev->stats.tx_packets++; | |
157 | dev->stats.tx_bytes += len; | |
158 | } else { | |
159 | dev->stats.tx_errors++; | |
160 | dev->stats.tx_aborted_errors++; | |
161 | } | |
162 | return NETDEV_TX_OK; | |
163 | } | |
164 | ||
165 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
166 | unsigned short type, const void *daddr, |
167 | const void *saddr, unsigned len) | |
b863ceb7 PM |
168 | { |
169 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
170 | struct net_device *lowerdev = vlan->lowerdev; | |
171 | ||
0c4e8581 SH |
172 | return dev_hard_header(skb, lowerdev, type, daddr, |
173 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
174 | } |
175 | ||
3b04ddde SH |
176 | static const struct header_ops macvlan_hard_header_ops = { |
177 | .create = macvlan_hard_header, | |
178 | .rebuild = eth_rebuild_header, | |
179 | .parse = eth_header_parse, | |
3b04ddde SH |
180 | .cache = eth_header_cache, |
181 | .cache_update = eth_header_cache_update, | |
182 | }; | |
183 | ||
b863ceb7 PM |
184 | static int macvlan_open(struct net_device *dev) |
185 | { | |
186 | struct macvlan_dev *vlan = netdev_priv(dev); | |
187 | struct macvlan_port *port = vlan->port; | |
188 | struct net_device *lowerdev = vlan->lowerdev; | |
189 | int err; | |
190 | ||
191 | err = dev_unicast_add(lowerdev, dev->dev_addr, ETH_ALEN); | |
192 | if (err < 0) | |
b89fb7da WC |
193 | goto out; |
194 | if (dev->flags & IFF_ALLMULTI) { | |
195 | err = dev_set_allmulti(lowerdev, 1); | |
196 | if (err < 0) | |
197 | goto del_unicast; | |
198 | } | |
b863ceb7 PM |
199 | |
200 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[dev->dev_addr[5]]); | |
201 | return 0; | |
b89fb7da WC |
202 | |
203 | del_unicast: | |
204 | dev_unicast_delete(lowerdev, dev->dev_addr, ETH_ALEN); | |
205 | out: | |
206 | return err; | |
b863ceb7 PM |
207 | } |
208 | ||
209 | static int macvlan_stop(struct net_device *dev) | |
210 | { | |
211 | struct macvlan_dev *vlan = netdev_priv(dev); | |
212 | struct net_device *lowerdev = vlan->lowerdev; | |
213 | ||
214 | dev_mc_unsync(lowerdev, dev); | |
215 | if (dev->flags & IFF_ALLMULTI) | |
216 | dev_set_allmulti(lowerdev, -1); | |
217 | ||
218 | dev_unicast_delete(lowerdev, dev->dev_addr, ETH_ALEN); | |
219 | ||
220 | hlist_del_rcu(&vlan->hlist); | |
221 | synchronize_rcu(); | |
222 | return 0; | |
223 | } | |
224 | ||
ad5d20a6 PM |
225 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
226 | { | |
227 | struct macvlan_dev *vlan = netdev_priv(dev); | |
228 | struct net_device *lowerdev = vlan->lowerdev; | |
229 | struct sockaddr *addr = p; | |
230 | int err; | |
231 | ||
232 | if (!is_valid_ether_addr(addr->sa_data)) | |
233 | return -EADDRNOTAVAIL; | |
234 | ||
235 | if (!(dev->flags & IFF_UP)) | |
236 | goto out; | |
237 | ||
238 | err = dev_unicast_add(lowerdev, addr->sa_data, ETH_ALEN); | |
239 | if (err < 0) | |
240 | return err; | |
241 | dev_unicast_delete(lowerdev, dev->dev_addr, ETH_ALEN); | |
242 | ||
243 | out: | |
244 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
245 | return 0; | |
246 | } | |
247 | ||
b863ceb7 PM |
248 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
249 | { | |
250 | struct macvlan_dev *vlan = netdev_priv(dev); | |
251 | struct net_device *lowerdev = vlan->lowerdev; | |
252 | ||
253 | if (change & IFF_ALLMULTI) | |
254 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
255 | } | |
256 | ||
257 | static void macvlan_set_multicast_list(struct net_device *dev) | |
258 | { | |
259 | struct macvlan_dev *vlan = netdev_priv(dev); | |
260 | ||
261 | dev_mc_sync(vlan->lowerdev, dev); | |
262 | } | |
263 | ||
264 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
265 | { | |
266 | struct macvlan_dev *vlan = netdev_priv(dev); | |
267 | ||
268 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
269 | return -EINVAL; | |
270 | dev->mtu = new_mtu; | |
271 | return 0; | |
272 | } | |
273 | ||
274 | /* | |
275 | * macvlan network devices have devices nesting below it and are a special | |
276 | * "super class" of normal network devices; split their locks off into a | |
277 | * separate class since they always nest. | |
278 | */ | |
279 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 280 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
281 | |
282 | #define MACVLAN_FEATURES \ | |
283 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
284 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
285 | NETIF_F_TSO_ECN | NETIF_F_TSO6) | |
286 | ||
287 | #define MACVLAN_STATE_MASK \ | |
288 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
289 | ||
e8a0464c DM |
290 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
291 | struct netdev_queue *txq, | |
292 | void *_unused) | |
c773e847 DM |
293 | { |
294 | lockdep_set_class(&txq->_xmit_lock, | |
295 | &macvlan_netdev_xmit_lock_key); | |
296 | } | |
297 | ||
298 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
299 | { | |
cf508b12 DM |
300 | lockdep_set_class(&dev->addr_list_lock, |
301 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 302 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
303 | } |
304 | ||
b863ceb7 PM |
305 | static int macvlan_init(struct net_device *dev) |
306 | { | |
307 | struct macvlan_dev *vlan = netdev_priv(dev); | |
308 | const struct net_device *lowerdev = vlan->lowerdev; | |
309 | ||
310 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
311 | (lowerdev->state & MACVLAN_STATE_MASK); | |
312 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
313 | dev->iflink = lowerdev->ifindex; | |
314 | ||
c773e847 DM |
315 | macvlan_set_lockdep_class(dev); |
316 | ||
b863ceb7 PM |
317 | return 0; |
318 | } | |
319 | ||
320 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, | |
321 | struct ethtool_drvinfo *drvinfo) | |
322 | { | |
323 | snprintf(drvinfo->driver, 32, "macvlan"); | |
324 | snprintf(drvinfo->version, 32, "0.1"); | |
325 | } | |
326 | ||
327 | static u32 macvlan_ethtool_get_rx_csum(struct net_device *dev) | |
328 | { | |
329 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
330 | struct net_device *lowerdev = vlan->lowerdev; | |
331 | ||
332 | if (lowerdev->ethtool_ops->get_rx_csum == NULL) | |
333 | return 0; | |
334 | return lowerdev->ethtool_ops->get_rx_csum(lowerdev); | |
335 | } | |
336 | ||
9edb8bb6 SH |
337 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
338 | struct ethtool_cmd *cmd) | |
339 | { | |
340 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
341 | struct net_device *lowerdev = vlan->lowerdev; | |
342 | ||
343 | if (!lowerdev->ethtool_ops->get_settings) | |
344 | return -EOPNOTSUPP; | |
345 | ||
346 | return lowerdev->ethtool_ops->get_settings(lowerdev, cmd); | |
347 | } | |
348 | ||
349 | static u32 macvlan_ethtool_get_flags(struct net_device *dev) | |
350 | { | |
351 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
352 | struct net_device *lowerdev = vlan->lowerdev; | |
353 | ||
354 | if (!lowerdev->ethtool_ops->get_flags) | |
355 | return 0; | |
356 | return lowerdev->ethtool_ops->get_flags(lowerdev); | |
357 | } | |
358 | ||
b863ceb7 PM |
359 | static const struct ethtool_ops macvlan_ethtool_ops = { |
360 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 361 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 | 362 | .get_rx_csum = macvlan_ethtool_get_rx_csum, |
b863ceb7 | 363 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
9edb8bb6 | 364 | .get_flags = macvlan_ethtool_get_flags, |
b863ceb7 PM |
365 | }; |
366 | ||
54a30c97 SH |
367 | static const struct net_device_ops macvlan_netdev_ops = { |
368 | .ndo_init = macvlan_init, | |
369 | .ndo_open = macvlan_open, | |
370 | .ndo_stop = macvlan_stop, | |
00829823 | 371 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
372 | .ndo_change_mtu = macvlan_change_mtu, |
373 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
374 | .ndo_set_mac_address = macvlan_set_mac_address, | |
375 | .ndo_set_multicast_list = macvlan_set_multicast_list, | |
376 | .ndo_validate_addr = eth_validate_addr, | |
377 | }; | |
378 | ||
b863ceb7 PM |
379 | static void macvlan_setup(struct net_device *dev) |
380 | { | |
381 | ether_setup(dev); | |
382 | ||
54a30c97 | 383 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 384 | dev->destructor = free_netdev; |
3b04ddde | 385 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 PM |
386 | dev->ethtool_ops = &macvlan_ethtool_ops; |
387 | dev->tx_queue_len = 0; | |
388 | } | |
389 | ||
390 | static int macvlan_port_create(struct net_device *dev) | |
391 | { | |
392 | struct macvlan_port *port; | |
393 | unsigned int i; | |
394 | ||
395 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
396 | return -EINVAL; | |
397 | ||
398 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
399 | if (port == NULL) | |
400 | return -ENOMEM; | |
401 | ||
402 | port->dev = dev; | |
403 | INIT_LIST_HEAD(&port->vlans); | |
404 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
405 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
406 | rcu_assign_pointer(dev->macvlan_port, port); | |
407 | return 0; | |
408 | } | |
409 | ||
410 | static void macvlan_port_destroy(struct net_device *dev) | |
411 | { | |
412 | struct macvlan_port *port = dev->macvlan_port; | |
413 | ||
414 | rcu_assign_pointer(dev->macvlan_port, NULL); | |
415 | synchronize_rcu(); | |
416 | kfree(port); | |
417 | } | |
418 | ||
419 | static void macvlan_transfer_operstate(struct net_device *dev) | |
420 | { | |
421 | struct macvlan_dev *vlan = netdev_priv(dev); | |
422 | const struct net_device *lowerdev = vlan->lowerdev; | |
423 | ||
424 | if (lowerdev->operstate == IF_OPER_DORMANT) | |
425 | netif_dormant_on(dev); | |
426 | else | |
427 | netif_dormant_off(dev); | |
428 | ||
429 | if (netif_carrier_ok(lowerdev)) { | |
430 | if (!netif_carrier_ok(dev)) | |
431 | netif_carrier_on(dev); | |
432 | } else { | |
f12ca5f9 | 433 | if (netif_carrier_ok(dev)) |
b863ceb7 PM |
434 | netif_carrier_off(dev); |
435 | } | |
436 | } | |
437 | ||
438 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
439 | { | |
440 | if (tb[IFLA_ADDRESS]) { | |
441 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
442 | return -EINVAL; | |
443 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
444 | return -EADDRNOTAVAIL; | |
445 | } | |
446 | return 0; | |
447 | } | |
448 | ||
449 | static int macvlan_newlink(struct net_device *dev, | |
450 | struct nlattr *tb[], struct nlattr *data[]) | |
451 | { | |
452 | struct macvlan_dev *vlan = netdev_priv(dev); | |
453 | struct macvlan_port *port; | |
454 | struct net_device *lowerdev; | |
455 | int err; | |
456 | ||
457 | if (!tb[IFLA_LINK]) | |
458 | return -EINVAL; | |
459 | ||
c346dca1 | 460 | lowerdev = __dev_get_by_index(dev_net(dev), nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
461 | if (lowerdev == NULL) |
462 | return -ENODEV; | |
463 | ||
a6ca5f1d PM |
464 | /* Don't allow macvlans on top of other macvlans - its not really |
465 | * wrong, but lockdep can't handle it and its not useful for anything | |
466 | * you couldn't do directly on top of the real device. | |
467 | */ | |
468 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) | |
469 | return -ENODEV; | |
470 | ||
b863ceb7 PM |
471 | if (!tb[IFLA_MTU]) |
472 | dev->mtu = lowerdev->mtu; | |
473 | else if (dev->mtu > lowerdev->mtu) | |
474 | return -EINVAL; | |
475 | ||
476 | if (!tb[IFLA_ADDRESS]) | |
477 | random_ether_addr(dev->dev_addr); | |
478 | ||
479 | if (lowerdev->macvlan_port == NULL) { | |
480 | err = macvlan_port_create(lowerdev); | |
481 | if (err < 0) | |
482 | return err; | |
483 | } | |
484 | port = lowerdev->macvlan_port; | |
485 | ||
486 | vlan->lowerdev = lowerdev; | |
487 | vlan->dev = dev; | |
488 | vlan->port = port; | |
489 | ||
490 | err = register_netdevice(dev); | |
491 | if (err < 0) | |
492 | return err; | |
493 | ||
494 | list_add_tail(&vlan->list, &port->vlans); | |
495 | macvlan_transfer_operstate(dev); | |
496 | return 0; | |
497 | } | |
498 | ||
499 | static void macvlan_dellink(struct net_device *dev) | |
500 | { | |
501 | struct macvlan_dev *vlan = netdev_priv(dev); | |
502 | struct macvlan_port *port = vlan->port; | |
503 | ||
504 | list_del(&vlan->list); | |
505 | unregister_netdevice(dev); | |
506 | ||
507 | if (list_empty(&port->vlans)) | |
73120964 | 508 | macvlan_port_destroy(port->dev); |
b863ceb7 PM |
509 | } |
510 | ||
511 | static struct rtnl_link_ops macvlan_link_ops __read_mostly = { | |
512 | .kind = "macvlan", | |
513 | .priv_size = sizeof(struct macvlan_dev), | |
514 | .setup = macvlan_setup, | |
515 | .validate = macvlan_validate, | |
516 | .newlink = macvlan_newlink, | |
517 | .dellink = macvlan_dellink, | |
518 | }; | |
519 | ||
520 | static int macvlan_device_event(struct notifier_block *unused, | |
521 | unsigned long event, void *ptr) | |
522 | { | |
523 | struct net_device *dev = ptr; | |
524 | struct macvlan_dev *vlan, *next; | |
525 | struct macvlan_port *port; | |
526 | ||
527 | port = dev->macvlan_port; | |
528 | if (port == NULL) | |
529 | return NOTIFY_DONE; | |
530 | ||
531 | switch (event) { | |
532 | case NETDEV_CHANGE: | |
533 | list_for_each_entry(vlan, &port->vlans, list) | |
534 | macvlan_transfer_operstate(vlan->dev); | |
535 | break; | |
536 | case NETDEV_FEAT_CHANGE: | |
537 | list_for_each_entry(vlan, &port->vlans, list) { | |
538 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
539 | netdev_features_change(vlan->dev); | |
540 | } | |
541 | break; | |
542 | case NETDEV_UNREGISTER: | |
543 | list_for_each_entry_safe(vlan, next, &port->vlans, list) | |
544 | macvlan_dellink(vlan->dev); | |
545 | break; | |
546 | } | |
547 | return NOTIFY_DONE; | |
548 | } | |
549 | ||
550 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
551 | .notifier_call = macvlan_device_event, | |
552 | }; | |
553 | ||
554 | static int __init macvlan_init_module(void) | |
555 | { | |
556 | int err; | |
557 | ||
558 | register_netdevice_notifier(&macvlan_notifier_block); | |
559 | macvlan_handle_frame_hook = macvlan_handle_frame; | |
560 | ||
561 | err = rtnl_link_register(&macvlan_link_ops); | |
562 | if (err < 0) | |
563 | goto err1; | |
564 | return 0; | |
565 | err1: | |
52913246 | 566 | macvlan_handle_frame_hook = NULL; |
b863ceb7 PM |
567 | unregister_netdevice_notifier(&macvlan_notifier_block); |
568 | return err; | |
569 | } | |
570 | ||
571 | static void __exit macvlan_cleanup_module(void) | |
572 | { | |
573 | rtnl_link_unregister(&macvlan_link_ops); | |
574 | macvlan_handle_frame_hook = NULL; | |
575 | unregister_netdevice_notifier(&macvlan_notifier_block); | |
576 | } | |
577 | ||
578 | module_init(macvlan_init_module); | |
579 | module_exit(macvlan_cleanup_module); | |
580 | ||
581 | MODULE_LICENSE("GPL"); | |
582 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
583 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
584 | MODULE_ALIAS_RTNL_LINK("macvlan"); |