2 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
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.
9 * The code this is based on carried the following copyright notice:
11 * (C) Copyright 2001-2006
12 * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com
13 * Re-worked by Ben Greear <greearb@candelatech.com>
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>
23 #include <linux/rculist.h>
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>
34 #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
37 struct net_device *dev;
38 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
39 struct list_head vlans;
45 static void macvlan_port_destroy(struct net_device *dev);
47 #define macvlan_port_get_rcu(dev) \
48 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
49 #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
50 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
52 static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
53 const unsigned char *addr)
55 struct macvlan_dev *vlan;
58 hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) {
59 if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr))
65 static void macvlan_hash_add(struct macvlan_dev *vlan)
67 struct macvlan_port *port = vlan->port;
68 const unsigned char *addr = vlan->dev->dev_addr;
70 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]);
73 static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
75 hlist_del_rcu(&vlan->hlist);
80 static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
81 const unsigned char *addr)
83 macvlan_hash_del(vlan, true);
84 /* Now that we are unhashed it is safe to change the device
85 * address without confusing packet delivery.
87 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
88 macvlan_hash_add(vlan);
91 static int macvlan_addr_busy(const struct macvlan_port *port,
92 const unsigned char *addr)
94 /* Test to see if the specified multicast address is
95 * currently in use by the underlying device or
98 if (!compare_ether_addr_64bits(port->dev->dev_addr, addr))
101 if (macvlan_hash_lookup(port, addr))
108 static int macvlan_broadcast_one(struct sk_buff *skb,
109 const struct macvlan_dev *vlan,
110 const struct ethhdr *eth, bool local)
112 struct net_device *dev = vlan->dev;
117 return vlan->forward(dev, skb);
120 if (!compare_ether_addr_64bits(eth->h_dest,
122 skb->pkt_type = PACKET_BROADCAST;
124 skb->pkt_type = PACKET_MULTICAST;
126 return vlan->receive(skb);
129 static void macvlan_broadcast(struct sk_buff *skb,
130 const struct macvlan_port *port,
131 struct net_device *src,
132 enum macvlan_mode mode)
134 const struct ethhdr *eth = eth_hdr(skb);
135 const struct macvlan_dev *vlan;
136 struct hlist_node *n;
137 struct sk_buff *nskb;
141 if (skb->protocol == htons(ETH_P_PAUSE))
144 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
145 hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) {
146 if (vlan->dev == src || !(vlan->mode & mode))
149 nskb = skb_clone(skb, GFP_ATOMIC);
150 err = macvlan_broadcast_one(nskb, vlan, eth,
151 mode == MACVLAN_MODE_BRIDGE);
152 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
153 err == NET_RX_SUCCESS, 1);
158 /* called under rcu_read_lock() from netif_receive_skb */
159 static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
161 struct macvlan_port *port;
162 struct sk_buff *skb = *pskb;
163 const struct ethhdr *eth = eth_hdr(skb);
164 const struct macvlan_dev *vlan;
165 const struct macvlan_dev *src;
166 struct net_device *dev;
167 unsigned int len = 0;
168 int ret = NET_RX_DROP;
170 port = macvlan_port_get_rcu(skb->dev);
171 if (is_multicast_ether_addr(eth->h_dest)) {
172 src = macvlan_hash_lookup(port, eth->h_source);
174 /* frame comes from an external address */
175 macvlan_broadcast(skb, port, NULL,
176 MACVLAN_MODE_PRIVATE |
178 MACVLAN_MODE_PASSTHRU|
179 MACVLAN_MODE_BRIDGE);
180 else if (src->mode == MACVLAN_MODE_VEPA)
181 /* flood to everyone except source */
182 macvlan_broadcast(skb, port, src->dev,
184 MACVLAN_MODE_BRIDGE);
185 else if (src->mode == MACVLAN_MODE_BRIDGE)
187 * flood only to VEPA ports, bridge ports
188 * already saw the frame on the way out.
190 macvlan_broadcast(skb, port, src->dev,
192 return RX_HANDLER_PASS;
196 vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
198 vlan = macvlan_hash_lookup(port, eth->h_dest);
200 return RX_HANDLER_PASS;
203 if (unlikely(!(dev->flags & IFF_UP))) {
205 return RX_HANDLER_CONSUMED;
207 len = skb->len + ETH_HLEN;
208 skb = skb_share_check(skb, GFP_ATOMIC);
213 skb->pkt_type = PACKET_HOST;
215 ret = vlan->receive(skb);
218 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
219 return RX_HANDLER_CONSUMED;
222 static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
224 const struct macvlan_dev *vlan = netdev_priv(dev);
225 const struct macvlan_port *port = vlan->port;
226 const struct macvlan_dev *dest;
227 __u8 ip_summed = skb->ip_summed;
229 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
230 const struct ethhdr *eth = (void *)skb->data;
231 skb->ip_summed = CHECKSUM_UNNECESSARY;
233 /* send to other bridge ports directly */
234 if (is_multicast_ether_addr(eth->h_dest)) {
235 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
239 dest = macvlan_hash_lookup(port, eth->h_dest);
240 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
241 /* send to lowerdev first for its network taps */
242 vlan->forward(vlan->lowerdev, skb);
244 return NET_XMIT_SUCCESS;
249 skb->ip_summed = ip_summed;
250 skb_set_dev(skb, vlan->lowerdev);
251 return dev_queue_xmit(skb);
254 netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
255 struct net_device *dev)
257 unsigned int len = skb->len;
259 const struct macvlan_dev *vlan = netdev_priv(dev);
261 ret = macvlan_queue_xmit(skb, dev);
262 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
263 struct macvlan_pcpu_stats *pcpu_stats;
265 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
266 u64_stats_update_begin(&pcpu_stats->syncp);
267 pcpu_stats->tx_packets++;
268 pcpu_stats->tx_bytes += len;
269 u64_stats_update_end(&pcpu_stats->syncp);
271 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
275 EXPORT_SYMBOL_GPL(macvlan_start_xmit);
277 static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
278 unsigned short type, const void *daddr,
279 const void *saddr, unsigned len)
281 const struct macvlan_dev *vlan = netdev_priv(dev);
282 struct net_device *lowerdev = vlan->lowerdev;
284 return dev_hard_header(skb, lowerdev, type, daddr,
285 saddr ? : dev->dev_addr, len);
288 static const struct header_ops macvlan_hard_header_ops = {
289 .create = macvlan_hard_header,
290 .rebuild = eth_rebuild_header,
291 .parse = eth_header_parse,
292 .cache = eth_header_cache,
293 .cache_update = eth_header_cache_update,
296 static int macvlan_open(struct net_device *dev)
298 struct macvlan_dev *vlan = netdev_priv(dev);
299 struct net_device *lowerdev = vlan->lowerdev;
302 if (vlan->port->passthru) {
303 dev_set_promiscuity(lowerdev, 1);
308 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
311 err = dev_uc_add(lowerdev, dev->dev_addr);
314 if (dev->flags & IFF_ALLMULTI) {
315 err = dev_set_allmulti(lowerdev, 1);
321 macvlan_hash_add(vlan);
325 dev_uc_del(lowerdev, dev->dev_addr);
330 static int macvlan_stop(struct net_device *dev)
332 struct macvlan_dev *vlan = netdev_priv(dev);
333 struct net_device *lowerdev = vlan->lowerdev;
335 if (vlan->port->passthru) {
336 dev_set_promiscuity(lowerdev, -1);
340 dev_mc_unsync(lowerdev, dev);
341 if (dev->flags & IFF_ALLMULTI)
342 dev_set_allmulti(lowerdev, -1);
344 dev_uc_del(lowerdev, dev->dev_addr);
347 macvlan_hash_del(vlan, !dev->dismantle);
351 static int macvlan_set_mac_address(struct net_device *dev, void *p)
353 struct macvlan_dev *vlan = netdev_priv(dev);
354 struct net_device *lowerdev = vlan->lowerdev;
355 struct sockaddr *addr = p;
358 if (!is_valid_ether_addr(addr->sa_data))
359 return -EADDRNOTAVAIL;
361 if (!(dev->flags & IFF_UP)) {
362 /* Just copy in the new address */
363 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
365 /* Rehash and update the device filters */
366 if (macvlan_addr_busy(vlan->port, addr->sa_data))
369 err = dev_uc_add(lowerdev, addr->sa_data);
373 dev_uc_del(lowerdev, dev->dev_addr);
375 macvlan_hash_change_addr(vlan, addr->sa_data);
380 static void macvlan_change_rx_flags(struct net_device *dev, int change)
382 struct macvlan_dev *vlan = netdev_priv(dev);
383 struct net_device *lowerdev = vlan->lowerdev;
385 if (change & IFF_ALLMULTI)
386 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
389 static void macvlan_set_multicast_list(struct net_device *dev)
391 struct macvlan_dev *vlan = netdev_priv(dev);
393 dev_mc_sync(vlan->lowerdev, dev);
396 static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
398 struct macvlan_dev *vlan = netdev_priv(dev);
400 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
407 * macvlan network devices have devices nesting below it and are a special
408 * "super class" of normal network devices; split their locks off into a
409 * separate class since they always nest.
411 static struct lock_class_key macvlan_netdev_xmit_lock_key;
412 static struct lock_class_key macvlan_netdev_addr_lock_key;
414 #define MACVLAN_FEATURES \
415 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
416 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
417 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM)
419 #define MACVLAN_STATE_MASK \
420 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
422 static void macvlan_set_lockdep_class_one(struct net_device *dev,
423 struct netdev_queue *txq,
426 lockdep_set_class(&txq->_xmit_lock,
427 &macvlan_netdev_xmit_lock_key);
430 static void macvlan_set_lockdep_class(struct net_device *dev)
432 lockdep_set_class(&dev->addr_list_lock,
433 &macvlan_netdev_addr_lock_key);
434 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
437 static int macvlan_init(struct net_device *dev)
439 struct macvlan_dev *vlan = netdev_priv(dev);
440 const struct net_device *lowerdev = vlan->lowerdev;
442 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
443 (lowerdev->state & MACVLAN_STATE_MASK);
444 dev->features = lowerdev->features & MACVLAN_FEATURES;
445 dev->features |= NETIF_F_LLTX;
446 dev->gso_max_size = lowerdev->gso_max_size;
447 dev->iflink = lowerdev->ifindex;
448 dev->hard_header_len = lowerdev->hard_header_len;
450 macvlan_set_lockdep_class(dev);
452 vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
453 if (!vlan->pcpu_stats)
459 static void macvlan_uninit(struct net_device *dev)
461 struct macvlan_dev *vlan = netdev_priv(dev);
462 struct macvlan_port *port = vlan->port;
464 free_percpu(vlan->pcpu_stats);
468 macvlan_port_destroy(port->dev);
471 static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
472 struct rtnl_link_stats64 *stats)
474 struct macvlan_dev *vlan = netdev_priv(dev);
476 if (vlan->pcpu_stats) {
477 struct macvlan_pcpu_stats *p;
478 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
479 u32 rx_errors = 0, tx_dropped = 0;
483 for_each_possible_cpu(i) {
484 p = per_cpu_ptr(vlan->pcpu_stats, i);
486 start = u64_stats_fetch_begin_bh(&p->syncp);
487 rx_packets = p->rx_packets;
488 rx_bytes = p->rx_bytes;
489 rx_multicast = p->rx_multicast;
490 tx_packets = p->tx_packets;
491 tx_bytes = p->tx_bytes;
492 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
494 stats->rx_packets += rx_packets;
495 stats->rx_bytes += rx_bytes;
496 stats->multicast += rx_multicast;
497 stats->tx_packets += tx_packets;
498 stats->tx_bytes += tx_bytes;
499 /* rx_errors & tx_dropped are u32, updated
500 * without syncp protection.
502 rx_errors += p->rx_errors;
503 tx_dropped += p->tx_dropped;
505 stats->rx_errors = rx_errors;
506 stats->rx_dropped = rx_errors;
507 stats->tx_dropped = tx_dropped;
512 static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
513 struct ethtool_drvinfo *drvinfo)
515 snprintf(drvinfo->driver, 32, "macvlan");
516 snprintf(drvinfo->version, 32, "0.1");
519 static int macvlan_ethtool_get_settings(struct net_device *dev,
520 struct ethtool_cmd *cmd)
522 const struct macvlan_dev *vlan = netdev_priv(dev);
523 return dev_ethtool_get_settings(vlan->lowerdev, cmd);
526 static const struct ethtool_ops macvlan_ethtool_ops = {
527 .get_link = ethtool_op_get_link,
528 .get_settings = macvlan_ethtool_get_settings,
529 .get_drvinfo = macvlan_ethtool_get_drvinfo,
532 static const struct net_device_ops macvlan_netdev_ops = {
533 .ndo_init = macvlan_init,
534 .ndo_uninit = macvlan_uninit,
535 .ndo_open = macvlan_open,
536 .ndo_stop = macvlan_stop,
537 .ndo_start_xmit = macvlan_start_xmit,
538 .ndo_change_mtu = macvlan_change_mtu,
539 .ndo_change_rx_flags = macvlan_change_rx_flags,
540 .ndo_set_mac_address = macvlan_set_mac_address,
541 .ndo_set_multicast_list = macvlan_set_multicast_list,
542 .ndo_get_stats64 = macvlan_dev_get_stats64,
543 .ndo_validate_addr = eth_validate_addr,
546 void macvlan_common_setup(struct net_device *dev)
550 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
551 dev->netdev_ops = &macvlan_netdev_ops;
552 dev->destructor = free_netdev;
553 dev->header_ops = &macvlan_hard_header_ops,
554 dev->ethtool_ops = &macvlan_ethtool_ops;
556 EXPORT_SYMBOL_GPL(macvlan_common_setup);
558 static void macvlan_setup(struct net_device *dev)
560 macvlan_common_setup(dev);
561 dev->tx_queue_len = 0;
564 static int macvlan_port_create(struct net_device *dev)
566 struct macvlan_port *port;
570 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
573 port = kzalloc(sizeof(*port), GFP_KERNEL);
577 port->passthru = false;
579 INIT_LIST_HEAD(&port->vlans);
580 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
581 INIT_HLIST_HEAD(&port->vlan_hash[i]);
583 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
587 dev->priv_flags |= IFF_MACVLAN_PORT;
591 static void macvlan_port_destroy(struct net_device *dev)
593 struct macvlan_port *port = macvlan_port_get(dev);
595 dev->priv_flags &= ~IFF_MACVLAN_PORT;
596 netdev_rx_handler_unregister(dev);
597 kfree_rcu(port, rcu);
600 static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
602 if (tb[IFLA_ADDRESS]) {
603 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
605 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
606 return -EADDRNOTAVAIL;
609 if (data && data[IFLA_MACVLAN_MODE]) {
610 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
611 case MACVLAN_MODE_PRIVATE:
612 case MACVLAN_MODE_VEPA:
613 case MACVLAN_MODE_BRIDGE:
614 case MACVLAN_MODE_PASSTHRU:
623 int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
624 struct nlattr *tb[], struct nlattr *data[],
625 int (*receive)(struct sk_buff *skb),
626 int (*forward)(struct net_device *dev,
627 struct sk_buff *skb))
629 struct macvlan_dev *vlan = netdev_priv(dev);
630 struct macvlan_port *port;
631 struct net_device *lowerdev;
637 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
638 if (lowerdev == NULL)
641 /* When creating macvlans on top of other macvlans - use
642 * the real device as the lowerdev.
644 if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) {
645 struct macvlan_dev *lowervlan = netdev_priv(lowerdev);
646 lowerdev = lowervlan->lowerdev;
650 dev->mtu = lowerdev->mtu;
651 else if (dev->mtu > lowerdev->mtu)
654 if (!tb[IFLA_ADDRESS])
655 random_ether_addr(dev->dev_addr);
657 if (!macvlan_port_exists(lowerdev)) {
658 err = macvlan_port_create(lowerdev);
662 port = macvlan_port_get(lowerdev);
664 /* Only 1 macvlan device can be created in passthru mode */
668 vlan->lowerdev = lowerdev;
671 vlan->receive = receive;
672 vlan->forward = forward;
674 vlan->mode = MACVLAN_MODE_VEPA;
675 if (data && data[IFLA_MACVLAN_MODE])
676 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
678 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
681 port->passthru = true;
682 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
686 err = register_netdevice(dev);
690 list_add_tail(&vlan->list, &port->vlans);
691 netif_stacked_transfer_operstate(lowerdev, dev);
698 macvlan_port_destroy(lowerdev);
702 EXPORT_SYMBOL_GPL(macvlan_common_newlink);
704 static int macvlan_newlink(struct net *src_net, struct net_device *dev,
705 struct nlattr *tb[], struct nlattr *data[])
707 return macvlan_common_newlink(src_net, dev, tb, data,
712 void macvlan_dellink(struct net_device *dev, struct list_head *head)
714 struct macvlan_dev *vlan = netdev_priv(dev);
716 list_del(&vlan->list);
717 unregister_netdevice_queue(dev, head);
719 EXPORT_SYMBOL_GPL(macvlan_dellink);
721 static int macvlan_changelink(struct net_device *dev,
722 struct nlattr *tb[], struct nlattr *data[])
724 struct macvlan_dev *vlan = netdev_priv(dev);
725 if (data && data[IFLA_MACVLAN_MODE])
726 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
730 static size_t macvlan_get_size(const struct net_device *dev)
732 return nla_total_size(4);
735 static int macvlan_fill_info(struct sk_buff *skb,
736 const struct net_device *dev)
738 struct macvlan_dev *vlan = netdev_priv(dev);
740 NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode);
747 static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
748 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
751 int macvlan_link_register(struct rtnl_link_ops *ops)
754 ops->priv_size = sizeof(struct macvlan_dev);
755 ops->validate = macvlan_validate;
756 ops->maxtype = IFLA_MACVLAN_MAX;
757 ops->policy = macvlan_policy;
758 ops->changelink = macvlan_changelink;
759 ops->get_size = macvlan_get_size;
760 ops->fill_info = macvlan_fill_info;
762 return rtnl_link_register(ops);
764 EXPORT_SYMBOL_GPL(macvlan_link_register);
766 static struct rtnl_link_ops macvlan_link_ops = {
768 .setup = macvlan_setup,
769 .newlink = macvlan_newlink,
770 .dellink = macvlan_dellink,
773 static int macvlan_device_event(struct notifier_block *unused,
774 unsigned long event, void *ptr)
776 struct net_device *dev = ptr;
777 struct macvlan_dev *vlan, *next;
778 struct macvlan_port *port;
779 LIST_HEAD(list_kill);
781 if (!macvlan_port_exists(dev))
784 port = macvlan_port_get(dev);
788 list_for_each_entry(vlan, &port->vlans, list)
789 netif_stacked_transfer_operstate(vlan->lowerdev,
792 case NETDEV_FEAT_CHANGE:
793 list_for_each_entry(vlan, &port->vlans, list) {
794 vlan->dev->features = dev->features & MACVLAN_FEATURES;
795 vlan->dev->gso_max_size = dev->gso_max_size;
796 netdev_features_change(vlan->dev);
799 case NETDEV_UNREGISTER:
800 /* twiddle thumbs on netns device moves */
801 if (dev->reg_state != NETREG_UNREGISTERING)
804 list_for_each_entry_safe(vlan, next, &port->vlans, list)
805 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
806 unregister_netdevice_many(&list_kill);
807 list_del(&list_kill);
809 case NETDEV_PRE_TYPE_CHANGE:
810 /* Forbid underlaying device to change its type. */
816 static struct notifier_block macvlan_notifier_block __read_mostly = {
817 .notifier_call = macvlan_device_event,
820 static int __init macvlan_init_module(void)
824 register_netdevice_notifier(&macvlan_notifier_block);
826 err = macvlan_link_register(&macvlan_link_ops);
831 unregister_netdevice_notifier(&macvlan_notifier_block);
835 static void __exit macvlan_cleanup_module(void)
837 rtnl_link_unregister(&macvlan_link_ops);
838 unregister_netdevice_notifier(&macvlan_notifier_block);
841 module_init(macvlan_init_module);
842 module_exit(macvlan_cleanup_module);
844 MODULE_LICENSE("GPL");
845 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
846 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
847 MODULE_ALIAS_RTNL_LINK("macvlan");