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 skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
174 return RX_HANDLER_CONSUMED;
177 src = macvlan_hash_lookup(port, eth->h_source);
179 /* frame comes from an external address */
180 macvlan_broadcast(skb, port, NULL,
181 MACVLAN_MODE_PRIVATE |
183 MACVLAN_MODE_PASSTHRU|
184 MACVLAN_MODE_BRIDGE);
185 else if (src->mode == MACVLAN_MODE_VEPA)
186 /* flood to everyone except source */
187 macvlan_broadcast(skb, port, src->dev,
189 MACVLAN_MODE_BRIDGE);
190 else if (src->mode == MACVLAN_MODE_BRIDGE)
192 * flood only to VEPA ports, bridge ports
193 * already saw the frame on the way out.
195 macvlan_broadcast(skb, port, src->dev,
198 /* forward to original port. */
200 ret = macvlan_broadcast_one(skb, vlan, eth, 0);
204 return RX_HANDLER_PASS;
208 vlan = list_first_or_null_rcu(&port->vlans,
209 struct macvlan_dev, list);
211 vlan = macvlan_hash_lookup(port, eth->h_dest);
213 return RX_HANDLER_PASS;
216 if (unlikely(!(dev->flags & IFF_UP))) {
218 return RX_HANDLER_CONSUMED;
220 len = skb->len + ETH_HLEN;
221 skb = skb_share_check(skb, GFP_ATOMIC);
227 skb->pkt_type = PACKET_HOST;
229 ret = vlan->receive(skb);
232 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
233 return RX_HANDLER_CONSUMED;
236 static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
238 const struct macvlan_dev *vlan = netdev_priv(dev);
239 const struct macvlan_port *port = vlan->port;
240 const struct macvlan_dev *dest;
242 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
243 const struct ethhdr *eth = (void *)skb->data;
245 /* send to other bridge ports directly */
246 if (is_multicast_ether_addr(eth->h_dest)) {
247 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
251 dest = macvlan_hash_lookup(port, eth->h_dest);
252 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
253 /* send to lowerdev first for its network taps */
254 dev_forward_skb(vlan->lowerdev, skb);
256 return NET_XMIT_SUCCESS;
261 skb->dev = vlan->lowerdev;
262 return dev_queue_xmit(skb);
265 netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
266 struct net_device *dev)
268 unsigned int len = skb->len;
270 const struct macvlan_dev *vlan = netdev_priv(dev);
272 ret = macvlan_queue_xmit(skb, dev);
273 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
274 struct macvlan_pcpu_stats *pcpu_stats;
276 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
277 u64_stats_update_begin(&pcpu_stats->syncp);
278 pcpu_stats->tx_packets++;
279 pcpu_stats->tx_bytes += len;
280 u64_stats_update_end(&pcpu_stats->syncp);
282 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
286 EXPORT_SYMBOL_GPL(macvlan_start_xmit);
288 static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
289 unsigned short type, const void *daddr,
290 const void *saddr, unsigned len)
292 const struct macvlan_dev *vlan = netdev_priv(dev);
293 struct net_device *lowerdev = vlan->lowerdev;
295 return dev_hard_header(skb, lowerdev, type, daddr,
296 saddr ? : dev->dev_addr, len);
299 static const struct header_ops macvlan_hard_header_ops = {
300 .create = macvlan_hard_header,
301 .rebuild = eth_rebuild_header,
302 .parse = eth_header_parse,
303 .cache = eth_header_cache,
304 .cache_update = eth_header_cache_update,
307 static int macvlan_open(struct net_device *dev)
309 struct macvlan_dev *vlan = netdev_priv(dev);
310 struct net_device *lowerdev = vlan->lowerdev;
313 if (vlan->port->passthru) {
314 dev_set_promiscuity(lowerdev, 1);
319 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
322 err = dev_uc_add(lowerdev, dev->dev_addr);
325 if (dev->flags & IFF_ALLMULTI) {
326 err = dev_set_allmulti(lowerdev, 1);
332 macvlan_hash_add(vlan);
336 dev_uc_del(lowerdev, dev->dev_addr);
341 static int macvlan_stop(struct net_device *dev)
343 struct macvlan_dev *vlan = netdev_priv(dev);
344 struct net_device *lowerdev = vlan->lowerdev;
346 if (vlan->port->passthru) {
347 dev_set_promiscuity(lowerdev, -1);
351 dev_mc_unsync(lowerdev, dev);
352 if (dev->flags & IFF_ALLMULTI)
353 dev_set_allmulti(lowerdev, -1);
355 dev_uc_del(lowerdev, dev->dev_addr);
358 macvlan_hash_del(vlan, !dev->dismantle);
362 static int macvlan_set_mac_address(struct net_device *dev, void *p)
364 struct macvlan_dev *vlan = netdev_priv(dev);
365 struct net_device *lowerdev = vlan->lowerdev;
366 struct sockaddr *addr = p;
369 if (!is_valid_ether_addr(addr->sa_data))
370 return -EADDRNOTAVAIL;
372 if (!(dev->flags & IFF_UP)) {
373 /* Just copy in the new address */
374 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
376 /* Rehash and update the device filters */
377 if (macvlan_addr_busy(vlan->port, addr->sa_data))
380 err = dev_uc_add(lowerdev, addr->sa_data);
384 dev_uc_del(lowerdev, dev->dev_addr);
386 macvlan_hash_change_addr(vlan, addr->sa_data);
391 static void macvlan_change_rx_flags(struct net_device *dev, int change)
393 struct macvlan_dev *vlan = netdev_priv(dev);
394 struct net_device *lowerdev = vlan->lowerdev;
396 if (dev->flags & IFF_UP) {
397 if (change & IFF_ALLMULTI)
398 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
402 static void macvlan_set_multicast_list(struct net_device *dev)
404 struct macvlan_dev *vlan = netdev_priv(dev);
406 dev_mc_sync(vlan->lowerdev, dev);
409 static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
411 struct macvlan_dev *vlan = netdev_priv(dev);
413 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
420 * macvlan network devices have devices nesting below it and are a special
421 * "super class" of normal network devices; split their locks off into a
422 * separate class since they always nest.
424 static struct lock_class_key macvlan_netdev_xmit_lock_key;
425 static struct lock_class_key macvlan_netdev_addr_lock_key;
427 #define MACVLAN_FEATURES \
428 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
429 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
430 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
431 NETIF_F_HW_VLAN_FILTER)
433 #define MACVLAN_STATE_MASK \
434 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
436 static void macvlan_set_lockdep_class_one(struct net_device *dev,
437 struct netdev_queue *txq,
440 lockdep_set_class(&txq->_xmit_lock,
441 &macvlan_netdev_xmit_lock_key);
444 static void macvlan_set_lockdep_class(struct net_device *dev)
446 lockdep_set_class(&dev->addr_list_lock,
447 &macvlan_netdev_addr_lock_key);
448 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
451 static int macvlan_init(struct net_device *dev)
453 struct macvlan_dev *vlan = netdev_priv(dev);
454 const struct net_device *lowerdev = vlan->lowerdev;
456 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
457 (lowerdev->state & MACVLAN_STATE_MASK);
458 dev->features = lowerdev->features & MACVLAN_FEATURES;
459 dev->features |= NETIF_F_LLTX;
460 dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES;
461 dev->gso_max_size = lowerdev->gso_max_size;
462 dev->iflink = lowerdev->ifindex;
463 dev->hard_header_len = lowerdev->hard_header_len;
465 macvlan_set_lockdep_class(dev);
467 vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
468 if (!vlan->pcpu_stats)
474 static void macvlan_uninit(struct net_device *dev)
476 struct macvlan_dev *vlan = netdev_priv(dev);
477 struct macvlan_port *port = vlan->port;
479 free_percpu(vlan->pcpu_stats);
483 macvlan_port_destroy(port->dev);
486 static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
487 struct rtnl_link_stats64 *stats)
489 struct macvlan_dev *vlan = netdev_priv(dev);
491 if (vlan->pcpu_stats) {
492 struct macvlan_pcpu_stats *p;
493 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
494 u32 rx_errors = 0, tx_dropped = 0;
498 for_each_possible_cpu(i) {
499 p = per_cpu_ptr(vlan->pcpu_stats, i);
501 start = u64_stats_fetch_begin_bh(&p->syncp);
502 rx_packets = p->rx_packets;
503 rx_bytes = p->rx_bytes;
504 rx_multicast = p->rx_multicast;
505 tx_packets = p->tx_packets;
506 tx_bytes = p->tx_bytes;
507 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
509 stats->rx_packets += rx_packets;
510 stats->rx_bytes += rx_bytes;
511 stats->multicast += rx_multicast;
512 stats->tx_packets += tx_packets;
513 stats->tx_bytes += tx_bytes;
514 /* rx_errors & tx_dropped are u32, updated
515 * without syncp protection.
517 rx_errors += p->rx_errors;
518 tx_dropped += p->tx_dropped;
520 stats->rx_errors = rx_errors;
521 stats->rx_dropped = rx_errors;
522 stats->tx_dropped = tx_dropped;
527 static void macvlan_vlan_rx_add_vid(struct net_device *dev,
530 struct macvlan_dev *vlan = netdev_priv(dev);
531 struct net_device *lowerdev = vlan->lowerdev;
532 const struct net_device_ops *ops = lowerdev->netdev_ops;
534 if (ops->ndo_vlan_rx_add_vid)
535 ops->ndo_vlan_rx_add_vid(lowerdev, vid);
538 static void macvlan_vlan_rx_kill_vid(struct net_device *dev,
541 struct macvlan_dev *vlan = netdev_priv(dev);
542 struct net_device *lowerdev = vlan->lowerdev;
543 const struct net_device_ops *ops = lowerdev->netdev_ops;
545 if (ops->ndo_vlan_rx_kill_vid)
546 ops->ndo_vlan_rx_kill_vid(lowerdev, vid);
549 static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
550 struct ethtool_drvinfo *drvinfo)
552 snprintf(drvinfo->driver, 32, "macvlan");
553 snprintf(drvinfo->version, 32, "0.1");
556 static int macvlan_ethtool_get_settings(struct net_device *dev,
557 struct ethtool_cmd *cmd)
559 const struct macvlan_dev *vlan = netdev_priv(dev);
561 return __ethtool_get_settings(vlan->lowerdev, cmd);
564 static const struct ethtool_ops macvlan_ethtool_ops = {
565 .get_link = ethtool_op_get_link,
566 .get_settings = macvlan_ethtool_get_settings,
567 .get_drvinfo = macvlan_ethtool_get_drvinfo,
570 static const struct net_device_ops macvlan_netdev_ops = {
571 .ndo_init = macvlan_init,
572 .ndo_uninit = macvlan_uninit,
573 .ndo_open = macvlan_open,
574 .ndo_stop = macvlan_stop,
575 .ndo_start_xmit = macvlan_start_xmit,
576 .ndo_change_mtu = macvlan_change_mtu,
577 .ndo_change_rx_flags = macvlan_change_rx_flags,
578 .ndo_set_mac_address = macvlan_set_mac_address,
579 .ndo_set_rx_mode = macvlan_set_multicast_list,
580 .ndo_get_stats64 = macvlan_dev_get_stats64,
581 .ndo_validate_addr = eth_validate_addr,
582 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
583 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
586 void macvlan_common_setup(struct net_device *dev)
590 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
591 dev->priv_flags |= IFF_UNICAST_FLT;
592 dev->netdev_ops = &macvlan_netdev_ops;
593 dev->destructor = free_netdev;
594 dev->header_ops = &macvlan_hard_header_ops,
595 dev->ethtool_ops = &macvlan_ethtool_ops;
597 EXPORT_SYMBOL_GPL(macvlan_common_setup);
599 static void macvlan_setup(struct net_device *dev)
601 macvlan_common_setup(dev);
602 dev->tx_queue_len = 0;
605 static int macvlan_port_create(struct net_device *dev)
607 struct macvlan_port *port;
611 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
614 port = kzalloc(sizeof(*port), GFP_KERNEL);
618 port->passthru = false;
620 INIT_LIST_HEAD(&port->vlans);
621 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
622 INIT_HLIST_HEAD(&port->vlan_hash[i]);
624 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
628 dev->priv_flags |= IFF_MACVLAN_PORT;
632 static void macvlan_port_destroy(struct net_device *dev)
634 struct macvlan_port *port = macvlan_port_get(dev);
636 dev->priv_flags &= ~IFF_MACVLAN_PORT;
637 netdev_rx_handler_unregister(dev);
638 kfree_rcu(port, rcu);
641 static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
643 if (tb[IFLA_ADDRESS]) {
644 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
646 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
647 return -EADDRNOTAVAIL;
650 if (data && data[IFLA_MACVLAN_MODE]) {
651 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
652 case MACVLAN_MODE_PRIVATE:
653 case MACVLAN_MODE_VEPA:
654 case MACVLAN_MODE_BRIDGE:
655 case MACVLAN_MODE_PASSTHRU:
664 int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
665 struct nlattr *tb[], struct nlattr *data[],
666 int (*receive)(struct sk_buff *skb),
667 int (*forward)(struct net_device *dev,
668 struct sk_buff *skb))
670 struct macvlan_dev *vlan = netdev_priv(dev);
671 struct macvlan_port *port;
672 struct net_device *lowerdev;
678 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
679 if (lowerdev == NULL)
682 /* When creating macvlans on top of other macvlans - use
683 * the real device as the lowerdev.
685 if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) {
686 struct macvlan_dev *lowervlan = netdev_priv(lowerdev);
687 lowerdev = lowervlan->lowerdev;
691 dev->mtu = lowerdev->mtu;
692 else if (dev->mtu > lowerdev->mtu)
695 if (!tb[IFLA_ADDRESS])
696 random_ether_addr(dev->dev_addr);
698 if (!macvlan_port_exists(lowerdev)) {
699 err = macvlan_port_create(lowerdev);
703 port = macvlan_port_get(lowerdev);
705 /* Only 1 macvlan device can be created in passthru mode */
709 vlan->lowerdev = lowerdev;
712 vlan->receive = receive;
713 vlan->forward = forward;
715 vlan->mode = MACVLAN_MODE_VEPA;
716 if (data && data[IFLA_MACVLAN_MODE])
717 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
719 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
722 port->passthru = true;
723 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
727 err = register_netdevice(dev);
731 list_add_tail_rcu(&vlan->list, &port->vlans);
732 netif_stacked_transfer_operstate(lowerdev, dev);
739 macvlan_port_destroy(lowerdev);
743 EXPORT_SYMBOL_GPL(macvlan_common_newlink);
745 static int macvlan_newlink(struct net *src_net, struct net_device *dev,
746 struct nlattr *tb[], struct nlattr *data[])
748 return macvlan_common_newlink(src_net, dev, tb, data,
753 void macvlan_dellink(struct net_device *dev, struct list_head *head)
755 struct macvlan_dev *vlan = netdev_priv(dev);
757 list_del_rcu(&vlan->list);
758 unregister_netdevice_queue(dev, head);
760 EXPORT_SYMBOL_GPL(macvlan_dellink);
762 static int macvlan_changelink(struct net_device *dev,
763 struct nlattr *tb[], struct nlattr *data[])
765 struct macvlan_dev *vlan = netdev_priv(dev);
766 if (data && data[IFLA_MACVLAN_MODE])
767 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
771 static size_t macvlan_get_size(const struct net_device *dev)
773 return nla_total_size(4);
776 static int macvlan_fill_info(struct sk_buff *skb,
777 const struct net_device *dev)
779 struct macvlan_dev *vlan = netdev_priv(dev);
781 NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode);
788 static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
789 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
792 int macvlan_link_register(struct rtnl_link_ops *ops)
795 ops->priv_size = sizeof(struct macvlan_dev);
796 ops->validate = macvlan_validate;
797 ops->maxtype = IFLA_MACVLAN_MAX;
798 ops->policy = macvlan_policy;
799 ops->changelink = macvlan_changelink;
800 ops->get_size = macvlan_get_size;
801 ops->fill_info = macvlan_fill_info;
803 return rtnl_link_register(ops);
805 EXPORT_SYMBOL_GPL(macvlan_link_register);
807 static struct rtnl_link_ops macvlan_link_ops = {
809 .setup = macvlan_setup,
810 .newlink = macvlan_newlink,
811 .dellink = macvlan_dellink,
814 static int macvlan_device_event(struct notifier_block *unused,
815 unsigned long event, void *ptr)
817 struct net_device *dev = ptr;
818 struct macvlan_dev *vlan, *next;
819 struct macvlan_port *port;
820 LIST_HEAD(list_kill);
822 if (!macvlan_port_exists(dev))
825 port = macvlan_port_get(dev);
829 list_for_each_entry(vlan, &port->vlans, list)
830 netif_stacked_transfer_operstate(vlan->lowerdev,
833 case NETDEV_FEAT_CHANGE:
834 list_for_each_entry(vlan, &port->vlans, list) {
835 vlan->dev->features = dev->features & MACVLAN_FEATURES;
836 vlan->dev->gso_max_size = dev->gso_max_size;
837 netdev_features_change(vlan->dev);
840 case NETDEV_UNREGISTER:
841 /* twiddle thumbs on netns device moves */
842 if (dev->reg_state != NETREG_UNREGISTERING)
845 list_for_each_entry_safe(vlan, next, &port->vlans, list)
846 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
847 unregister_netdevice_many(&list_kill);
848 list_del(&list_kill);
850 case NETDEV_PRE_TYPE_CHANGE:
851 /* Forbid underlaying device to change its type. */
857 static struct notifier_block macvlan_notifier_block __read_mostly = {
858 .notifier_call = macvlan_device_event,
861 static int __init macvlan_init_module(void)
865 register_netdevice_notifier(&macvlan_notifier_block);
867 err = macvlan_link_register(&macvlan_link_ops);
872 unregister_netdevice_notifier(&macvlan_notifier_block);
876 static void __exit macvlan_cleanup_module(void)
878 rtnl_link_unregister(&macvlan_link_ops);
879 unregister_netdevice_notifier(&macvlan_notifier_block);
882 module_init(macvlan_init_module);
883 module_exit(macvlan_cleanup_module);
885 MODULE_LICENSE("GPL");
886 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
887 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
888 MODULE_ALIAS_RTNL_LINK("macvlan");