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_vlan.h>
30 #include <linux/if_link.h>
31 #include <linux/if_macvlan.h>
32 #include <linux/hash.h>
33 #include <linux/workqueue.h>
34 #include <net/rtnetlink.h>
36 #include <linux/netpoll.h>
38 #define MACVLAN_HASH_BITS 8
39 #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS)
40 #define MACVLAN_BC_QUEUE_LEN 1000
43 struct net_device *dev;
44 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
45 struct list_head vlans;
47 struct sk_buff_head bc_queue;
48 struct work_struct bc_work;
51 struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE];
54 struct macvlan_source_entry {
55 struct hlist_node hlist;
56 struct macvlan_dev *vlan;
57 unsigned char addr[6+2] __aligned(sizeof(u16));
61 struct macvlan_skb_cb {
62 const struct macvlan_dev *src;
65 #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
67 static void macvlan_port_destroy(struct net_device *dev);
69 /* Hash Ethernet address */
70 static u32 macvlan_eth_hash(const unsigned char *addr)
72 u64 value = get_unaligned((u64 *)addr);
74 /* only want 6 bytes */
80 return hash_64(value, MACVLAN_HASH_BITS);
83 static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
85 return rcu_dereference(dev->rx_handler_data);
88 static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev)
90 return rtnl_dereference(dev->rx_handler_data);
93 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
95 static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
96 const unsigned char *addr)
98 struct macvlan_dev *vlan;
99 u32 idx = macvlan_eth_hash(addr);
101 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) {
102 if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr))
108 static struct macvlan_source_entry *macvlan_hash_lookup_source(
109 const struct macvlan_dev *vlan,
110 const unsigned char *addr)
112 struct macvlan_source_entry *entry;
113 u32 idx = macvlan_eth_hash(addr);
114 struct hlist_head *h = &vlan->port->vlan_source_hash[idx];
116 hlist_for_each_entry_rcu(entry, h, hlist) {
117 if (ether_addr_equal_64bits(entry->addr, addr) &&
124 static int macvlan_hash_add_source(struct macvlan_dev *vlan,
125 const unsigned char *addr)
127 struct macvlan_port *port = vlan->port;
128 struct macvlan_source_entry *entry;
129 struct hlist_head *h;
131 entry = macvlan_hash_lookup_source(vlan, addr);
135 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
139 ether_addr_copy(entry->addr, addr);
141 h = &port->vlan_source_hash[macvlan_eth_hash(addr)];
142 hlist_add_head_rcu(&entry->hlist, h);
143 vlan->macaddr_count++;
148 static void macvlan_hash_add(struct macvlan_dev *vlan)
150 struct macvlan_port *port = vlan->port;
151 const unsigned char *addr = vlan->dev->dev_addr;
152 u32 idx = macvlan_eth_hash(addr);
154 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]);
157 static void macvlan_hash_del_source(struct macvlan_source_entry *entry)
159 hlist_del_rcu(&entry->hlist);
160 kfree_rcu(entry, rcu);
163 static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
165 hlist_del_rcu(&vlan->hlist);
170 static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
171 const unsigned char *addr)
173 macvlan_hash_del(vlan, true);
174 /* Now that we are unhashed it is safe to change the device
175 * address without confusing packet delivery.
177 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
178 macvlan_hash_add(vlan);
181 static int macvlan_addr_busy(const struct macvlan_port *port,
182 const unsigned char *addr)
184 /* Test to see if the specified multicast address is
185 * currently in use by the underlying device or
188 if (ether_addr_equal_64bits(port->dev->dev_addr, addr))
191 if (macvlan_hash_lookup(port, addr))
198 static int macvlan_broadcast_one(struct sk_buff *skb,
199 const struct macvlan_dev *vlan,
200 const struct ethhdr *eth, bool local)
202 struct net_device *dev = vlan->dev;
205 return __dev_forward_skb(dev, skb);
208 if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
209 skb->pkt_type = PACKET_BROADCAST;
211 skb->pkt_type = PACKET_MULTICAST;
216 static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
218 return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT);
222 static unsigned int mc_hash(const struct macvlan_dev *vlan,
223 const unsigned char *addr)
225 u32 val = __get_unaligned_cpu32(addr + 2);
227 val ^= macvlan_hash_mix(vlan);
228 return hash_32(val, MACVLAN_MC_FILTER_BITS);
231 static void macvlan_broadcast(struct sk_buff *skb,
232 const struct macvlan_port *port,
233 struct net_device *src,
234 enum macvlan_mode mode)
236 const struct ethhdr *eth = eth_hdr(skb);
237 const struct macvlan_dev *vlan;
238 struct sk_buff *nskb;
243 if (skb->protocol == htons(ETH_P_PAUSE))
246 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
247 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) {
248 if (vlan->dev == src || !(vlan->mode & mode))
251 hash = mc_hash(vlan, eth->h_dest);
252 if (!test_bit(hash, vlan->mc_filter))
256 nskb = skb_clone(skb, GFP_ATOMIC);
258 err = macvlan_broadcast_one(
260 mode == MACVLAN_MODE_BRIDGE) ?:
262 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
263 err == NET_RX_SUCCESS, true);
268 static void macvlan_process_broadcast(struct work_struct *w)
270 struct macvlan_port *port = container_of(w, struct macvlan_port,
273 struct sk_buff_head list;
275 __skb_queue_head_init(&list);
277 spin_lock_bh(&port->bc_queue.lock);
278 skb_queue_splice_tail_init(&port->bc_queue, &list);
279 spin_unlock_bh(&port->bc_queue.lock);
281 while ((skb = __skb_dequeue(&list))) {
282 const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
287 /* frame comes from an external address */
288 macvlan_broadcast(skb, port, NULL,
289 MACVLAN_MODE_PRIVATE |
291 MACVLAN_MODE_PASSTHRU|
292 MACVLAN_MODE_BRIDGE);
293 else if (src->mode == MACVLAN_MODE_VEPA)
294 /* flood to everyone except source */
295 macvlan_broadcast(skb, port, src->dev,
297 MACVLAN_MODE_BRIDGE);
300 * flood only to VEPA ports, bridge ports
301 * already saw the frame on the way out.
303 macvlan_broadcast(skb, port, src->dev,
312 static void macvlan_broadcast_enqueue(struct macvlan_port *port,
315 struct sk_buff *nskb;
318 nskb = skb_clone(skb, GFP_ATOMIC);
322 spin_lock(&port->bc_queue.lock);
323 if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) {
324 __skb_queue_tail(&port->bc_queue, nskb);
327 spin_unlock(&port->bc_queue.lock);
329 schedule_work(&port->bc_work);
339 atomic_long_inc(&skb->dev->rx_dropped);
342 static void macvlan_flush_sources(struct macvlan_port *port,
343 struct macvlan_dev *vlan)
347 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
348 struct hlist_node *h, *n;
350 hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) {
351 struct macvlan_source_entry *entry;
353 entry = hlist_entry(h, struct macvlan_source_entry,
355 if (entry->vlan == vlan)
356 macvlan_hash_del_source(entry);
359 vlan->macaddr_count = 0;
362 static void macvlan_forward_source_one(struct sk_buff *skb,
363 struct macvlan_dev *vlan)
365 struct sk_buff *nskb;
366 struct net_device *dev;
371 if (unlikely(!(dev->flags & IFF_UP)))
374 nskb = skb_clone(skb, GFP_ATOMIC);
378 len = nskb->len + ETH_HLEN;
380 nskb->pkt_type = PACKET_HOST;
382 ret = netif_rx(nskb);
383 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
386 static void macvlan_forward_source(struct sk_buff *skb,
387 struct macvlan_port *port,
388 const unsigned char *addr)
390 struct macvlan_source_entry *entry;
391 u32 idx = macvlan_eth_hash(addr);
392 struct hlist_head *h = &port->vlan_source_hash[idx];
394 hlist_for_each_entry_rcu(entry, h, hlist) {
395 if (ether_addr_equal_64bits(entry->addr, addr))
396 if (entry->vlan->dev->flags & IFF_UP)
397 macvlan_forward_source_one(skb, entry->vlan);
401 /* called under rcu_read_lock() from netif_receive_skb */
402 static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
404 struct macvlan_port *port;
405 struct sk_buff *skb = *pskb;
406 const struct ethhdr *eth = eth_hdr(skb);
407 const struct macvlan_dev *vlan;
408 const struct macvlan_dev *src;
409 struct net_device *dev;
410 unsigned int len = 0;
412 rx_handler_result_t handle_res;
414 port = macvlan_port_get_rcu(skb->dev);
415 if (is_multicast_ether_addr(eth->h_dest)) {
416 skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN);
418 return RX_HANDLER_CONSUMED;
421 macvlan_forward_source(skb, port, eth->h_source);
422 src = macvlan_hash_lookup(port, eth->h_source);
423 if (src && src->mode != MACVLAN_MODE_VEPA &&
424 src->mode != MACVLAN_MODE_BRIDGE) {
425 /* forward to original port. */
427 ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?:
429 handle_res = RX_HANDLER_CONSUMED;
433 MACVLAN_SKB_CB(skb)->src = src;
434 macvlan_broadcast_enqueue(port, skb);
436 return RX_HANDLER_PASS;
439 macvlan_forward_source(skb, port, eth->h_source);
441 vlan = list_first_or_null_rcu(&port->vlans,
442 struct macvlan_dev, list);
444 vlan = macvlan_hash_lookup(port, eth->h_dest);
445 if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE)
446 return RX_HANDLER_PASS;
449 if (unlikely(!(dev->flags & IFF_UP))) {
451 return RX_HANDLER_CONSUMED;
453 len = skb->len + ETH_HLEN;
454 skb = skb_share_check(skb, GFP_ATOMIC);
457 handle_res = RX_HANDLER_CONSUMED;
463 skb->pkt_type = PACKET_HOST;
465 ret = NET_RX_SUCCESS;
466 handle_res = RX_HANDLER_ANOTHER;
468 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
472 static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
474 const struct macvlan_dev *vlan = netdev_priv(dev);
475 const struct macvlan_port *port = vlan->port;
476 const struct macvlan_dev *dest;
478 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
479 const struct ethhdr *eth = skb_eth_hdr(skb);
481 /* send to other bridge ports directly */
482 if (is_multicast_ether_addr(eth->h_dest)) {
483 skb_reset_mac_header(skb);
484 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
488 dest = macvlan_hash_lookup(port, eth->h_dest);
489 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
490 /* send to lowerdev first for its network taps */
491 dev_forward_skb(vlan->lowerdev, skb);
493 return NET_XMIT_SUCCESS;
498 skb->dev = vlan->lowerdev;
499 return dev_queue_xmit(skb);
502 static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb)
504 #ifdef CONFIG_NET_POLL_CONTROLLER
506 netpoll_send_skb(vlan->netpoll, skb);
513 static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
514 struct net_device *dev)
516 unsigned int len = skb->len;
518 struct macvlan_dev *vlan = netdev_priv(dev);
520 if (unlikely(netpoll_tx_running(dev)))
521 return macvlan_netpoll_send_skb(vlan, skb);
523 if (vlan->fwd_priv) {
524 skb->dev = vlan->lowerdev;
525 ret = dev_queue_xmit_accel(skb, vlan->fwd_priv);
527 ret = macvlan_queue_xmit(skb, dev);
530 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
531 struct vlan_pcpu_stats *pcpu_stats;
533 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
534 u64_stats_update_begin(&pcpu_stats->syncp);
535 pcpu_stats->tx_packets++;
536 pcpu_stats->tx_bytes += len;
537 u64_stats_update_end(&pcpu_stats->syncp);
539 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
544 static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
545 unsigned short type, const void *daddr,
546 const void *saddr, unsigned len)
548 const struct macvlan_dev *vlan = netdev_priv(dev);
549 struct net_device *lowerdev = vlan->lowerdev;
551 return dev_hard_header(skb, lowerdev, type, daddr,
552 saddr ? : dev->dev_addr, len);
555 static const struct header_ops macvlan_hard_header_ops = {
556 .create = macvlan_hard_header,
557 .parse = eth_header_parse,
558 .cache = eth_header_cache,
559 .cache_update = eth_header_cache_update,
562 static struct rtnl_link_ops macvlan_link_ops;
564 static int macvlan_open(struct net_device *dev)
566 struct macvlan_dev *vlan = netdev_priv(dev);
567 struct net_device *lowerdev = vlan->lowerdev;
570 if (vlan->port->passthru) {
571 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
572 err = dev_set_promiscuity(lowerdev, 1);
579 if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD &&
580 dev->rtnl_link_ops == &macvlan_link_ops) {
582 lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);
584 /* If we get a NULL pointer back, or if we get an error
585 * then we should just fall through to the non accelerated path
587 if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
588 vlan->fwd_priv = NULL;
594 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
597 err = dev_uc_add(lowerdev, dev->dev_addr);
600 if (dev->flags & IFF_ALLMULTI) {
601 err = dev_set_allmulti(lowerdev, 1);
606 if (dev->flags & IFF_PROMISC) {
607 err = dev_set_promiscuity(lowerdev, 1);
613 macvlan_hash_add(vlan);
617 dev_set_allmulti(lowerdev, -1);
619 dev_uc_del(lowerdev, dev->dev_addr);
621 if (vlan->fwd_priv) {
622 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
624 vlan->fwd_priv = NULL;
629 static int macvlan_stop(struct net_device *dev)
631 struct macvlan_dev *vlan = netdev_priv(dev);
632 struct net_device *lowerdev = vlan->lowerdev;
634 if (vlan->fwd_priv) {
635 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
637 vlan->fwd_priv = NULL;
641 dev_uc_unsync(lowerdev, dev);
642 dev_mc_unsync(lowerdev, dev);
644 if (vlan->port->passthru) {
645 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
646 dev_set_promiscuity(lowerdev, -1);
650 if (dev->flags & IFF_ALLMULTI)
651 dev_set_allmulti(lowerdev, -1);
653 if (dev->flags & IFF_PROMISC)
654 dev_set_promiscuity(lowerdev, -1);
656 dev_uc_del(lowerdev, dev->dev_addr);
659 macvlan_hash_del(vlan, !dev->dismantle);
663 static int macvlan_sync_address(struct net_device *dev, unsigned char *addr)
665 struct macvlan_dev *vlan = netdev_priv(dev);
666 struct net_device *lowerdev = vlan->lowerdev;
669 if (!(dev->flags & IFF_UP)) {
670 /* Just copy in the new address */
671 ether_addr_copy(dev->dev_addr, addr);
673 /* Rehash and update the device filters */
674 if (macvlan_addr_busy(vlan->port, addr))
677 if (!vlan->port->passthru) {
678 err = dev_uc_add(lowerdev, addr);
682 dev_uc_del(lowerdev, dev->dev_addr);
685 macvlan_hash_change_addr(vlan, addr);
690 static int macvlan_set_mac_address(struct net_device *dev, void *p)
692 struct macvlan_dev *vlan = netdev_priv(dev);
693 struct sockaddr *addr = p;
695 if (!is_valid_ether_addr(addr->sa_data))
696 return -EADDRNOTAVAIL;
698 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
699 dev_set_mac_address(vlan->lowerdev, addr);
703 return macvlan_sync_address(dev, addr->sa_data);
706 static void macvlan_change_rx_flags(struct net_device *dev, int change)
708 struct macvlan_dev *vlan = netdev_priv(dev);
709 struct net_device *lowerdev = vlan->lowerdev;
711 if (dev->flags & IFF_UP) {
712 if (change & IFF_ALLMULTI)
713 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
714 if (change & IFF_PROMISC)
715 dev_set_promiscuity(lowerdev,
716 dev->flags & IFF_PROMISC ? 1 : -1);
721 static void macvlan_set_mac_lists(struct net_device *dev)
723 struct macvlan_dev *vlan = netdev_priv(dev);
725 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
726 bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ);
728 struct netdev_hw_addr *ha;
729 DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
731 bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
732 netdev_for_each_mc_addr(ha, dev) {
733 __set_bit(mc_hash(vlan, ha->addr), filter);
736 __set_bit(mc_hash(vlan, dev->broadcast), filter);
738 bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ);
740 dev_uc_sync(vlan->lowerdev, dev);
741 dev_mc_sync(vlan->lowerdev, dev);
744 static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
746 struct macvlan_dev *vlan = netdev_priv(dev);
748 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
755 * macvlan network devices have devices nesting below it and are a special
756 * "super class" of normal network devices; split their locks off into a
757 * separate class since they always nest.
759 static struct lock_class_key macvlan_netdev_xmit_lock_key;
760 static struct lock_class_key macvlan_netdev_addr_lock_key;
762 #define ALWAYS_ON_FEATURES \
763 (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \
766 #define MACVLAN_FEATURES \
767 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
768 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \
769 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
770 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
772 #define MACVLAN_STATE_MASK \
773 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
775 static int macvlan_get_nest_level(struct net_device *dev)
777 return ((struct macvlan_dev *)netdev_priv(dev))->nest_level;
780 static void macvlan_set_lockdep_class_one(struct net_device *dev,
781 struct netdev_queue *txq,
784 lockdep_set_class(&txq->_xmit_lock,
785 &macvlan_netdev_xmit_lock_key);
788 static void macvlan_set_lockdep_class(struct net_device *dev)
790 lockdep_set_class_and_subclass(&dev->addr_list_lock,
791 &macvlan_netdev_addr_lock_key,
792 macvlan_get_nest_level(dev));
793 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
796 static int macvlan_init(struct net_device *dev)
798 struct macvlan_dev *vlan = netdev_priv(dev);
799 const struct net_device *lowerdev = vlan->lowerdev;
801 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
802 (lowerdev->state & MACVLAN_STATE_MASK);
803 dev->features = lowerdev->features & MACVLAN_FEATURES;
804 dev->features |= ALWAYS_ON_FEATURES;
805 dev->hw_features |= NETIF_F_LRO;
806 dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES;
807 dev->gso_max_size = lowerdev->gso_max_size;
808 dev->hard_header_len = lowerdev->hard_header_len;
810 macvlan_set_lockdep_class(dev);
812 vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
813 if (!vlan->pcpu_stats)
819 static void macvlan_uninit(struct net_device *dev)
821 struct macvlan_dev *vlan = netdev_priv(dev);
822 struct macvlan_port *port = vlan->port;
824 free_percpu(vlan->pcpu_stats);
826 macvlan_flush_sources(port, vlan);
829 macvlan_port_destroy(port->dev);
832 static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
833 struct rtnl_link_stats64 *stats)
835 struct macvlan_dev *vlan = netdev_priv(dev);
837 if (vlan->pcpu_stats) {
838 struct vlan_pcpu_stats *p;
839 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
840 u32 rx_errors = 0, tx_dropped = 0;
844 for_each_possible_cpu(i) {
845 p = per_cpu_ptr(vlan->pcpu_stats, i);
847 start = u64_stats_fetch_begin_irq(&p->syncp);
848 rx_packets = p->rx_packets;
849 rx_bytes = p->rx_bytes;
850 rx_multicast = p->rx_multicast;
851 tx_packets = p->tx_packets;
852 tx_bytes = p->tx_bytes;
853 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
855 stats->rx_packets += rx_packets;
856 stats->rx_bytes += rx_bytes;
857 stats->multicast += rx_multicast;
858 stats->tx_packets += tx_packets;
859 stats->tx_bytes += tx_bytes;
860 /* rx_errors & tx_dropped are u32, updated
861 * without syncp protection.
863 rx_errors += p->rx_errors;
864 tx_dropped += p->tx_dropped;
866 stats->rx_errors = rx_errors;
867 stats->rx_dropped = rx_errors;
868 stats->tx_dropped = tx_dropped;
873 static int macvlan_vlan_rx_add_vid(struct net_device *dev,
874 __be16 proto, u16 vid)
876 struct macvlan_dev *vlan = netdev_priv(dev);
877 struct net_device *lowerdev = vlan->lowerdev;
879 return vlan_vid_add(lowerdev, proto, vid);
882 static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
883 __be16 proto, u16 vid)
885 struct macvlan_dev *vlan = netdev_priv(dev);
886 struct net_device *lowerdev = vlan->lowerdev;
888 vlan_vid_del(lowerdev, proto, vid);
892 static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
893 struct net_device *dev,
894 const unsigned char *addr, u16 vid,
897 struct macvlan_dev *vlan = netdev_priv(dev);
900 /* Support unicast filter only on passthru devices.
901 * Multicast filter should be allowed on all devices.
903 if (!vlan->port->passthru && is_unicast_ether_addr(addr))
906 if (flags & NLM_F_REPLACE)
909 if (is_unicast_ether_addr(addr))
910 err = dev_uc_add_excl(dev, addr);
911 else if (is_multicast_ether_addr(addr))
912 err = dev_mc_add_excl(dev, addr);
917 static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
918 struct net_device *dev,
919 const unsigned char *addr, u16 vid)
921 struct macvlan_dev *vlan = netdev_priv(dev);
924 /* Support unicast filter only on passthru devices.
925 * Multicast filter should be allowed on all devices.
927 if (!vlan->port->passthru && is_unicast_ether_addr(addr))
930 if (is_unicast_ether_addr(addr))
931 err = dev_uc_del(dev, addr);
932 else if (is_multicast_ether_addr(addr))
933 err = dev_mc_del(dev, addr);
938 static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
939 struct ethtool_drvinfo *drvinfo)
941 strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
942 strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
945 static int macvlan_ethtool_get_settings(struct net_device *dev,
946 struct ethtool_cmd *cmd)
948 const struct macvlan_dev *vlan = netdev_priv(dev);
950 return __ethtool_get_settings(vlan->lowerdev, cmd);
953 static netdev_features_t macvlan_fix_features(struct net_device *dev,
954 netdev_features_t features)
956 struct macvlan_dev *vlan = netdev_priv(dev);
957 netdev_features_t lowerdev_features = vlan->lowerdev->features;
958 netdev_features_t mask;
960 features |= NETIF_F_ALL_FOR_ALL;
961 features &= (vlan->set_features | ~MACVLAN_FEATURES);
964 lowerdev_features &= (features | ~NETIF_F_LRO);
965 features = netdev_increment_features(lowerdev_features, features, mask);
966 features |= ALWAYS_ON_FEATURES;
967 features &= ~NETIF_F_NETNS_LOCAL;
972 #ifdef CONFIG_NET_POLL_CONTROLLER
973 static void macvlan_dev_poll_controller(struct net_device *dev)
978 static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
980 struct macvlan_dev *vlan = netdev_priv(dev);
981 struct net_device *real_dev = vlan->lowerdev;
982 struct netpoll *netpoll;
985 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
990 err = __netpoll_setup(netpoll, real_dev);
996 vlan->netpoll = netpoll;
1002 static void macvlan_dev_netpoll_cleanup(struct net_device *dev)
1004 struct macvlan_dev *vlan = netdev_priv(dev);
1005 struct netpoll *netpoll = vlan->netpoll;
1010 vlan->netpoll = NULL;
1012 __netpoll_free_async(netpoll);
1014 #endif /* CONFIG_NET_POLL_CONTROLLER */
1016 static int macvlan_dev_get_iflink(const struct net_device *dev)
1018 struct macvlan_dev *vlan = netdev_priv(dev);
1020 return vlan->lowerdev->ifindex;
1023 static const struct ethtool_ops macvlan_ethtool_ops = {
1024 .get_link = ethtool_op_get_link,
1025 .get_settings = macvlan_ethtool_get_settings,
1026 .get_drvinfo = macvlan_ethtool_get_drvinfo,
1029 static const struct net_device_ops macvlan_netdev_ops = {
1030 .ndo_init = macvlan_init,
1031 .ndo_uninit = macvlan_uninit,
1032 .ndo_open = macvlan_open,
1033 .ndo_stop = macvlan_stop,
1034 .ndo_start_xmit = macvlan_start_xmit,
1035 .ndo_change_mtu = macvlan_change_mtu,
1036 .ndo_fix_features = macvlan_fix_features,
1037 .ndo_change_rx_flags = macvlan_change_rx_flags,
1038 .ndo_set_mac_address = macvlan_set_mac_address,
1039 .ndo_set_rx_mode = macvlan_set_mac_lists,
1040 .ndo_get_stats64 = macvlan_dev_get_stats64,
1041 .ndo_validate_addr = eth_validate_addr,
1042 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
1043 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
1044 .ndo_fdb_add = macvlan_fdb_add,
1045 .ndo_fdb_del = macvlan_fdb_del,
1046 .ndo_fdb_dump = ndo_dflt_fdb_dump,
1047 .ndo_get_lock_subclass = macvlan_get_nest_level,
1048 #ifdef CONFIG_NET_POLL_CONTROLLER
1049 .ndo_poll_controller = macvlan_dev_poll_controller,
1050 .ndo_netpoll_setup = macvlan_dev_netpoll_setup,
1051 .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup,
1053 .ndo_get_iflink = macvlan_dev_get_iflink,
1054 .ndo_features_check = passthru_features_check,
1057 void macvlan_common_setup(struct net_device *dev)
1061 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1062 netif_keep_dst(dev);
1063 dev->priv_flags |= IFF_UNICAST_FLT;
1064 dev->netdev_ops = &macvlan_netdev_ops;
1065 dev->destructor = free_netdev;
1066 dev->header_ops = &macvlan_hard_header_ops;
1067 dev->ethtool_ops = &macvlan_ethtool_ops;
1069 EXPORT_SYMBOL_GPL(macvlan_common_setup);
1071 static void macvlan_setup(struct net_device *dev)
1073 macvlan_common_setup(dev);
1074 dev->tx_queue_len = 0;
1077 static int macvlan_port_create(struct net_device *dev)
1079 struct macvlan_port *port;
1083 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
1086 if (netif_is_ipvlan_port(dev))
1089 port = kzalloc(sizeof(*port), GFP_KERNEL);
1093 port->passthru = false;
1095 INIT_LIST_HEAD(&port->vlans);
1096 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1097 INIT_HLIST_HEAD(&port->vlan_hash[i]);
1098 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1099 INIT_HLIST_HEAD(&port->vlan_source_hash[i]);
1101 skb_queue_head_init(&port->bc_queue);
1102 INIT_WORK(&port->bc_work, macvlan_process_broadcast);
1104 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
1108 dev->priv_flags |= IFF_MACVLAN_PORT;
1112 static void macvlan_port_destroy(struct net_device *dev)
1114 struct macvlan_port *port = macvlan_port_get_rtnl(dev);
1115 struct sk_buff *skb;
1117 dev->priv_flags &= ~IFF_MACVLAN_PORT;
1118 netdev_rx_handler_unregister(dev);
1120 /* After this point, no packet can schedule bc_work anymore,
1121 * but we need to cancel it and purge left skbs if any.
1123 cancel_work_sync(&port->bc_work);
1125 while ((skb = __skb_dequeue(&port->bc_queue))) {
1126 const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
1134 kfree_rcu(port, rcu);
1137 static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
1139 if (tb[IFLA_ADDRESS]) {
1140 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1142 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1143 return -EADDRNOTAVAIL;
1146 if (data && data[IFLA_MACVLAN_FLAGS] &&
1147 nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)
1150 if (data && data[IFLA_MACVLAN_MODE]) {
1151 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
1152 case MACVLAN_MODE_PRIVATE:
1153 case MACVLAN_MODE_VEPA:
1154 case MACVLAN_MODE_BRIDGE:
1155 case MACVLAN_MODE_PASSTHRU:
1156 case MACVLAN_MODE_SOURCE:
1163 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1164 switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) {
1165 case MACVLAN_MACADDR_ADD:
1166 case MACVLAN_MACADDR_DEL:
1167 case MACVLAN_MACADDR_FLUSH:
1168 case MACVLAN_MACADDR_SET:
1175 if (data && data[IFLA_MACVLAN_MACADDR]) {
1176 if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN)
1179 if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR])))
1180 return -EADDRNOTAVAIL;
1183 if (data && data[IFLA_MACVLAN_MACADDR_COUNT])
1190 * reconfigure list of remote source mac address
1191 * (only for macvlan devices in source mode)
1192 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1193 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1195 static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode,
1196 struct nlattr *data[])
1200 struct nlattr *nla, *head;
1201 struct macvlan_source_entry *entry;
1203 if (data[IFLA_MACVLAN_MACADDR])
1204 addr = nla_data(data[IFLA_MACVLAN_MACADDR]);
1206 if (mode == MACVLAN_MACADDR_ADD) {
1210 return macvlan_hash_add_source(vlan, addr);
1212 } else if (mode == MACVLAN_MACADDR_DEL) {
1216 entry = macvlan_hash_lookup_source(vlan, addr);
1218 macvlan_hash_del_source(entry);
1219 vlan->macaddr_count--;
1221 } else if (mode == MACVLAN_MACADDR_FLUSH) {
1222 macvlan_flush_sources(vlan->port, vlan);
1223 } else if (mode == MACVLAN_MACADDR_SET) {
1224 macvlan_flush_sources(vlan->port, vlan);
1227 ret = macvlan_hash_add_source(vlan, addr);
1232 if (!data || !data[IFLA_MACVLAN_MACADDR_DATA])
1235 head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]);
1236 len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]);
1238 nla_for_each_attr(nla, head, len, rem) {
1239 if (nla_type(nla) != IFLA_MACVLAN_MACADDR ||
1240 nla_len(nla) != ETH_ALEN)
1243 addr = nla_data(nla);
1244 ret = macvlan_hash_add_source(vlan, addr);
1255 int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
1256 struct nlattr *tb[], struct nlattr *data[])
1258 struct macvlan_dev *vlan = netdev_priv(dev);
1259 struct macvlan_port *port;
1260 struct net_device *lowerdev;
1267 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
1268 if (lowerdev == NULL)
1271 /* When creating macvlans or macvtaps on top of other macvlans - use
1272 * the real device as the lowerdev.
1274 if (netif_is_macvlan(lowerdev))
1275 lowerdev = macvlan_dev_real_dev(lowerdev);
1278 dev->mtu = lowerdev->mtu;
1279 else if (dev->mtu > lowerdev->mtu)
1282 if (!tb[IFLA_ADDRESS])
1283 eth_hw_addr_random(dev);
1285 if (!macvlan_port_exists(lowerdev)) {
1286 err = macvlan_port_create(lowerdev);
1290 port = macvlan_port_get_rtnl(lowerdev);
1292 /* Only 1 macvlan device can be created in passthru mode */
1296 vlan->lowerdev = lowerdev;
1299 vlan->set_features = MACVLAN_FEATURES;
1300 vlan->nest_level = dev_get_nest_level(lowerdev, netif_is_macvlan) + 1;
1302 vlan->mode = MACVLAN_MODE_VEPA;
1303 if (data && data[IFLA_MACVLAN_MODE])
1304 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1306 if (data && data[IFLA_MACVLAN_FLAGS])
1307 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1309 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
1312 port->passthru = true;
1313 eth_hw_addr_inherit(dev, lowerdev);
1316 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1317 if (vlan->mode != MACVLAN_MODE_SOURCE)
1319 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1320 err = macvlan_changelink_sources(vlan, macmode, data);
1326 err = register_netdevice(dev);
1330 dev->priv_flags |= IFF_MACVLAN;
1331 err = netdev_upper_dev_link(lowerdev, dev);
1333 goto unregister_netdev;
1335 list_add_tail_rcu(&vlan->list, &port->vlans);
1336 netif_stacked_transfer_operstate(lowerdev, dev);
1341 unregister_netdevice(dev);
1345 macvlan_port_destroy(lowerdev);
1349 EXPORT_SYMBOL_GPL(macvlan_common_newlink);
1351 static int macvlan_newlink(struct net *src_net, struct net_device *dev,
1352 struct nlattr *tb[], struct nlattr *data[])
1354 return macvlan_common_newlink(src_net, dev, tb, data);
1357 void macvlan_dellink(struct net_device *dev, struct list_head *head)
1359 struct macvlan_dev *vlan = netdev_priv(dev);
1361 if (vlan->mode == MACVLAN_MODE_SOURCE)
1362 macvlan_flush_sources(vlan->port, vlan);
1363 list_del_rcu(&vlan->list);
1364 unregister_netdevice_queue(dev, head);
1365 netdev_upper_dev_unlink(vlan->lowerdev, dev);
1367 EXPORT_SYMBOL_GPL(macvlan_dellink);
1369 static int macvlan_changelink(struct net_device *dev,
1370 struct nlattr *tb[], struct nlattr *data[])
1372 struct macvlan_dev *vlan = netdev_priv(dev);
1373 enum macvlan_mode mode;
1374 bool set_mode = false;
1375 enum macvlan_macaddr_mode macmode;
1378 /* Validate mode, but don't set yet: setting flags may fail. */
1379 if (data && data[IFLA_MACVLAN_MODE]) {
1381 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1382 /* Passthrough mode can't be set or cleared dynamically */
1383 if ((mode == MACVLAN_MODE_PASSTHRU) !=
1384 (vlan->mode == MACVLAN_MODE_PASSTHRU))
1386 if (vlan->mode == MACVLAN_MODE_SOURCE &&
1388 macvlan_flush_sources(vlan->port, vlan);
1391 if (data && data[IFLA_MACVLAN_FLAGS]) {
1392 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1393 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
1394 if (vlan->port->passthru && promisc) {
1397 if (flags & MACVLAN_FLAG_NOPROMISC)
1398 err = dev_set_promiscuity(vlan->lowerdev, -1);
1400 err = dev_set_promiscuity(vlan->lowerdev, 1);
1404 vlan->flags = flags;
1408 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1409 if (vlan->mode != MACVLAN_MODE_SOURCE)
1411 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1412 ret = macvlan_changelink_sources(vlan, macmode, data);
1419 static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan)
1421 if (vlan->macaddr_count == 0)
1423 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1424 + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN);
1427 static size_t macvlan_get_size(const struct net_device *dev)
1429 struct macvlan_dev *vlan = netdev_priv(dev);
1432 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1433 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1434 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1435 + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */
1439 static int macvlan_fill_info_macaddr(struct sk_buff *skb,
1440 const struct macvlan_dev *vlan,
1443 struct hlist_head *h = &vlan->port->vlan_source_hash[i];
1444 struct macvlan_source_entry *entry;
1446 hlist_for_each_entry_rcu(entry, h, hlist) {
1447 if (entry->vlan != vlan)
1449 if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr))
1455 static int macvlan_fill_info(struct sk_buff *skb,
1456 const struct net_device *dev)
1458 struct macvlan_dev *vlan = netdev_priv(dev);
1460 struct nlattr *nest;
1462 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
1463 goto nla_put_failure;
1464 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
1465 goto nla_put_failure;
1466 if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count))
1467 goto nla_put_failure;
1468 if (vlan->macaddr_count > 0) {
1469 nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA);
1471 goto nla_put_failure;
1473 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
1474 if (macvlan_fill_info_macaddr(skb, vlan, i))
1475 goto nla_put_failure;
1477 nla_nest_end(skb, nest);
1485 static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
1486 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
1487 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
1488 [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 },
1489 [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1490 [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED },
1491 [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 },
1494 int macvlan_link_register(struct rtnl_link_ops *ops)
1497 ops->priv_size = sizeof(struct macvlan_dev);
1498 ops->validate = macvlan_validate;
1499 ops->maxtype = IFLA_MACVLAN_MAX;
1500 ops->policy = macvlan_policy;
1501 ops->changelink = macvlan_changelink;
1502 ops->get_size = macvlan_get_size;
1503 ops->fill_info = macvlan_fill_info;
1505 return rtnl_link_register(ops);
1507 EXPORT_SYMBOL_GPL(macvlan_link_register);
1509 static struct net *macvlan_get_link_net(const struct net_device *dev)
1511 return dev_net(macvlan_dev_real_dev(dev));
1514 static struct rtnl_link_ops macvlan_link_ops = {
1516 .setup = macvlan_setup,
1517 .newlink = macvlan_newlink,
1518 .dellink = macvlan_dellink,
1519 .get_link_net = macvlan_get_link_net,
1522 static int macvlan_device_event(struct notifier_block *unused,
1523 unsigned long event, void *ptr)
1525 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1526 struct macvlan_dev *vlan, *next;
1527 struct macvlan_port *port;
1528 LIST_HEAD(list_kill);
1530 if (!macvlan_port_exists(dev))
1533 port = macvlan_port_get_rtnl(dev);
1537 list_for_each_entry(vlan, &port->vlans, list)
1538 netif_stacked_transfer_operstate(vlan->lowerdev,
1541 case NETDEV_FEAT_CHANGE:
1542 list_for_each_entry(vlan, &port->vlans, list) {
1543 vlan->dev->gso_max_size = dev->gso_max_size;
1544 netdev_update_features(vlan->dev);
1547 case NETDEV_CHANGEMTU:
1548 list_for_each_entry(vlan, &port->vlans, list) {
1549 if (vlan->dev->mtu <= dev->mtu)
1551 dev_set_mtu(vlan->dev, dev->mtu);
1554 case NETDEV_CHANGEADDR:
1555 if (!port->passthru)
1558 vlan = list_first_entry_or_null(&port->vlans,
1562 if (macvlan_sync_address(vlan->dev, dev->dev_addr))
1566 case NETDEV_UNREGISTER:
1567 /* twiddle thumbs on netns device moves */
1568 if (dev->reg_state != NETREG_UNREGISTERING)
1571 list_for_each_entry_safe(vlan, next, &port->vlans, list)
1572 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
1573 unregister_netdevice_many(&list_kill);
1575 case NETDEV_PRE_TYPE_CHANGE:
1576 /* Forbid underlaying device to change its type. */
1579 case NETDEV_NOTIFY_PEERS:
1580 case NETDEV_BONDING_FAILOVER:
1581 case NETDEV_RESEND_IGMP:
1582 /* Propagate to all vlans */
1583 list_for_each_entry(vlan, &port->vlans, list)
1584 call_netdevice_notifiers(event, vlan->dev);
1589 static struct notifier_block macvlan_notifier_block __read_mostly = {
1590 .notifier_call = macvlan_device_event,
1593 static int __init macvlan_init_module(void)
1597 register_netdevice_notifier(&macvlan_notifier_block);
1599 err = macvlan_link_register(&macvlan_link_ops);
1604 unregister_netdevice_notifier(&macvlan_notifier_block);
1608 static void __exit macvlan_cleanup_module(void)
1610 rtnl_link_unregister(&macvlan_link_ops);
1611 unregister_netdevice_notifier(&macvlan_notifier_block);
1614 module_init(macvlan_init_module);
1615 module_exit(macvlan_cleanup_module);
1617 MODULE_LICENSE("GPL");
1618 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1619 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1620 MODULE_ALIAS_RTNL_LINK("macvlan");