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];
52 DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
55 struct macvlan_source_entry {
56 struct hlist_node hlist;
57 struct macvlan_dev *vlan;
58 unsigned char addr[6+2] __aligned(sizeof(u16));
62 struct macvlan_skb_cb {
63 const struct macvlan_dev *src;
66 #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
68 static void macvlan_port_destroy(struct net_device *dev);
70 /* Hash Ethernet address */
71 static u32 macvlan_eth_hash(const unsigned char *addr)
73 u64 value = get_unaligned((u64 *)addr);
75 /* only want 6 bytes */
81 return hash_64(value, MACVLAN_HASH_BITS);
84 static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
86 return rcu_dereference(dev->rx_handler_data);
89 static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev)
91 return rtnl_dereference(dev->rx_handler_data);
94 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
96 static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
97 const unsigned char *addr)
99 struct macvlan_dev *vlan;
100 u32 idx = macvlan_eth_hash(addr);
102 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) {
103 if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr))
109 static struct macvlan_source_entry *macvlan_hash_lookup_source(
110 const struct macvlan_dev *vlan,
111 const unsigned char *addr)
113 struct macvlan_source_entry *entry;
114 u32 idx = macvlan_eth_hash(addr);
115 struct hlist_head *h = &vlan->port->vlan_source_hash[idx];
117 hlist_for_each_entry_rcu(entry, h, hlist) {
118 if (ether_addr_equal_64bits(entry->addr, addr) &&
125 static int macvlan_hash_add_source(struct macvlan_dev *vlan,
126 const unsigned char *addr)
128 struct macvlan_port *port = vlan->port;
129 struct macvlan_source_entry *entry;
130 struct hlist_head *h;
132 entry = macvlan_hash_lookup_source(vlan, addr);
136 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
140 ether_addr_copy(entry->addr, addr);
142 h = &port->vlan_source_hash[macvlan_eth_hash(addr)];
143 hlist_add_head_rcu(&entry->hlist, h);
144 vlan->macaddr_count++;
149 static void macvlan_hash_add(struct macvlan_dev *vlan)
151 struct macvlan_port *port = vlan->port;
152 const unsigned char *addr = vlan->dev->dev_addr;
153 u32 idx = macvlan_eth_hash(addr);
155 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]);
158 static void macvlan_hash_del_source(struct macvlan_source_entry *entry)
160 hlist_del_rcu(&entry->hlist);
161 kfree_rcu(entry, rcu);
164 static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
166 hlist_del_rcu(&vlan->hlist);
171 static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
172 const unsigned char *addr)
174 macvlan_hash_del(vlan, true);
175 /* Now that we are unhashed it is safe to change the device
176 * address without confusing packet delivery.
178 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
179 macvlan_hash_add(vlan);
182 static int macvlan_addr_busy(const struct macvlan_port *port,
183 const unsigned char *addr)
185 /* Test to see if the specified multicast address is
186 * currently in use by the underlying device or
189 if (ether_addr_equal_64bits(port->dev->dev_addr, addr))
192 if (macvlan_hash_lookup(port, addr))
199 static int macvlan_broadcast_one(struct sk_buff *skb,
200 const struct macvlan_dev *vlan,
201 const struct ethhdr *eth, bool local)
203 struct net_device *dev = vlan->dev;
206 return __dev_forward_skb(dev, skb);
209 if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
210 skb->pkt_type = PACKET_BROADCAST;
212 skb->pkt_type = PACKET_MULTICAST;
217 static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
219 return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT);
223 static unsigned int mc_hash(const struct macvlan_dev *vlan,
224 const unsigned char *addr)
226 u32 val = __get_unaligned_cpu32(addr + 2);
228 val ^= macvlan_hash_mix(vlan);
229 return hash_32(val, MACVLAN_MC_FILTER_BITS);
232 static void macvlan_broadcast(struct sk_buff *skb,
233 const struct macvlan_port *port,
234 struct net_device *src,
235 enum macvlan_mode mode)
237 const struct ethhdr *eth = eth_hdr(skb);
238 const struct macvlan_dev *vlan;
239 struct sk_buff *nskb;
244 if (skb->protocol == htons(ETH_P_PAUSE))
247 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
248 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) {
249 if (vlan->dev == src || !(vlan->mode & mode))
252 hash = mc_hash(vlan, eth->h_dest);
253 if (!test_bit(hash, vlan->mc_filter))
257 nskb = skb_clone(skb, GFP_ATOMIC);
259 err = macvlan_broadcast_one(
261 mode == MACVLAN_MODE_BRIDGE) ?:
263 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
264 err == NET_RX_SUCCESS, true);
269 static void macvlan_process_broadcast(struct work_struct *w)
271 struct macvlan_port *port = container_of(w, struct macvlan_port,
274 struct sk_buff_head list;
276 __skb_queue_head_init(&list);
278 spin_lock_bh(&port->bc_queue.lock);
279 skb_queue_splice_tail_init(&port->bc_queue, &list);
280 spin_unlock_bh(&port->bc_queue.lock);
282 while ((skb = __skb_dequeue(&list))) {
283 const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
288 /* frame comes from an external address */
289 macvlan_broadcast(skb, port, NULL,
290 MACVLAN_MODE_PRIVATE |
292 MACVLAN_MODE_PASSTHRU|
293 MACVLAN_MODE_BRIDGE);
294 else if (src->mode == MACVLAN_MODE_VEPA)
295 /* flood to everyone except source */
296 macvlan_broadcast(skb, port, src->dev,
298 MACVLAN_MODE_BRIDGE);
301 * flood only to VEPA ports, bridge ports
302 * already saw the frame on the way out.
304 macvlan_broadcast(skb, port, src->dev,
317 static void macvlan_broadcast_enqueue(struct macvlan_port *port,
318 const struct macvlan_dev *src,
321 struct sk_buff *nskb;
324 nskb = skb_clone(skb, GFP_ATOMIC);
328 MACVLAN_SKB_CB(nskb)->src = src;
330 spin_lock(&port->bc_queue.lock);
331 if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) {
334 __skb_queue_tail(&port->bc_queue, nskb);
337 spin_unlock(&port->bc_queue.lock);
339 schedule_work(&port->bc_work);
349 atomic_long_inc(&skb->dev->rx_dropped);
352 static void macvlan_flush_sources(struct macvlan_port *port,
353 struct macvlan_dev *vlan)
357 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
358 struct hlist_node *h, *n;
360 hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) {
361 struct macvlan_source_entry *entry;
363 entry = hlist_entry(h, struct macvlan_source_entry,
365 if (entry->vlan == vlan)
366 macvlan_hash_del_source(entry);
369 vlan->macaddr_count = 0;
372 static void macvlan_forward_source_one(struct sk_buff *skb,
373 struct macvlan_dev *vlan)
375 struct sk_buff *nskb;
376 struct net_device *dev;
381 if (unlikely(!(dev->flags & IFF_UP)))
384 nskb = skb_clone(skb, GFP_ATOMIC);
388 len = nskb->len + ETH_HLEN;
390 nskb->pkt_type = PACKET_HOST;
392 ret = netif_rx(nskb);
393 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
396 static void macvlan_forward_source(struct sk_buff *skb,
397 struct macvlan_port *port,
398 const unsigned char *addr)
400 struct macvlan_source_entry *entry;
401 u32 idx = macvlan_eth_hash(addr);
402 struct hlist_head *h = &port->vlan_source_hash[idx];
404 hlist_for_each_entry_rcu(entry, h, hlist) {
405 if (ether_addr_equal_64bits(entry->addr, addr))
406 if (entry->vlan->dev->flags & IFF_UP)
407 macvlan_forward_source_one(skb, entry->vlan);
411 /* called under rcu_read_lock() from netif_receive_skb */
412 static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
414 struct macvlan_port *port;
415 struct sk_buff *skb = *pskb;
416 const struct ethhdr *eth = eth_hdr(skb);
417 const struct macvlan_dev *vlan;
418 const struct macvlan_dev *src;
419 struct net_device *dev;
420 unsigned int len = 0;
422 rx_handler_result_t handle_res;
424 /* Packets from dev_loopback_xmit() do not have L2 header, bail out */
425 if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
426 return RX_HANDLER_PASS;
428 port = macvlan_port_get_rcu(skb->dev);
429 if (is_multicast_ether_addr(eth->h_dest)) {
432 skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN);
434 return RX_HANDLER_CONSUMED;
437 macvlan_forward_source(skb, port, eth->h_source);
438 src = macvlan_hash_lookup(port, eth->h_source);
439 if (src && src->mode != MACVLAN_MODE_VEPA &&
440 src->mode != MACVLAN_MODE_BRIDGE) {
441 /* forward to original port. */
443 ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?:
445 handle_res = RX_HANDLER_CONSUMED;
449 hash = mc_hash(NULL, eth->h_dest);
450 if (test_bit(hash, port->mc_filter))
451 macvlan_broadcast_enqueue(port, src, skb);
453 return RX_HANDLER_PASS;
456 macvlan_forward_source(skb, port, eth->h_source);
458 vlan = list_first_or_null_rcu(&port->vlans,
459 struct macvlan_dev, list);
461 vlan = macvlan_hash_lookup(port, eth->h_dest);
462 if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE)
463 return RX_HANDLER_PASS;
466 if (unlikely(!(dev->flags & IFF_UP))) {
468 return RX_HANDLER_CONSUMED;
470 len = skb->len + ETH_HLEN;
471 skb = skb_share_check(skb, GFP_ATOMIC);
474 handle_res = RX_HANDLER_CONSUMED;
480 skb->pkt_type = PACKET_HOST;
482 ret = NET_RX_SUCCESS;
483 handle_res = RX_HANDLER_ANOTHER;
485 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
489 static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
491 const struct macvlan_dev *vlan = netdev_priv(dev);
492 const struct macvlan_port *port = vlan->port;
493 const struct macvlan_dev *dest;
495 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
496 const struct ethhdr *eth = skb_eth_hdr(skb);
498 /* send to other bridge ports directly */
499 if (is_multicast_ether_addr(eth->h_dest)) {
500 skb_reset_mac_header(skb);
501 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
505 dest = macvlan_hash_lookup(port, eth->h_dest);
506 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
507 /* send to lowerdev first for its network taps */
508 dev_forward_skb(vlan->lowerdev, skb);
510 return NET_XMIT_SUCCESS;
515 skb->dev = vlan->lowerdev;
516 return dev_queue_xmit(skb);
519 static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb)
521 #ifdef CONFIG_NET_POLL_CONTROLLER
523 netpoll_send_skb(vlan->netpoll, skb);
530 static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
531 struct net_device *dev)
533 unsigned int len = skb->len;
535 struct macvlan_dev *vlan = netdev_priv(dev);
537 if (unlikely(netpoll_tx_running(dev)))
538 return macvlan_netpoll_send_skb(vlan, skb);
540 if (vlan->fwd_priv) {
541 skb->dev = vlan->lowerdev;
542 ret = dev_queue_xmit_accel(skb, vlan->fwd_priv);
544 ret = macvlan_queue_xmit(skb, dev);
547 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
548 struct vlan_pcpu_stats *pcpu_stats;
550 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
551 u64_stats_update_begin(&pcpu_stats->syncp);
552 pcpu_stats->tx_packets++;
553 pcpu_stats->tx_bytes += len;
554 u64_stats_update_end(&pcpu_stats->syncp);
556 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
561 static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
562 unsigned short type, const void *daddr,
563 const void *saddr, unsigned len)
565 const struct macvlan_dev *vlan = netdev_priv(dev);
566 struct net_device *lowerdev = vlan->lowerdev;
568 return dev_hard_header(skb, lowerdev, type, daddr,
569 saddr ? : dev->dev_addr, len);
572 static const struct header_ops macvlan_hard_header_ops = {
573 .create = macvlan_hard_header,
574 .parse = eth_header_parse,
575 .cache = eth_header_cache,
576 .cache_update = eth_header_cache_update,
579 static struct rtnl_link_ops macvlan_link_ops;
581 static int macvlan_open(struct net_device *dev)
583 struct macvlan_dev *vlan = netdev_priv(dev);
584 struct net_device *lowerdev = vlan->lowerdev;
587 if (vlan->port->passthru) {
588 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
589 err = dev_set_promiscuity(lowerdev, 1);
596 if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD &&
597 dev->rtnl_link_ops == &macvlan_link_ops) {
599 lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);
601 /* If we get a NULL pointer back, or if we get an error
602 * then we should just fall through to the non accelerated path
604 if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
605 vlan->fwd_priv = NULL;
611 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
614 err = dev_uc_add(lowerdev, dev->dev_addr);
617 if (dev->flags & IFF_ALLMULTI) {
618 err = dev_set_allmulti(lowerdev, 1);
623 if (dev->flags & IFF_PROMISC) {
624 err = dev_set_promiscuity(lowerdev, 1);
630 macvlan_hash_add(vlan);
634 if (dev->flags & IFF_ALLMULTI)
635 dev_set_allmulti(lowerdev, -1);
637 dev_uc_del(lowerdev, dev->dev_addr);
639 if (vlan->fwd_priv) {
640 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
642 vlan->fwd_priv = NULL;
647 static int macvlan_stop(struct net_device *dev)
649 struct macvlan_dev *vlan = netdev_priv(dev);
650 struct net_device *lowerdev = vlan->lowerdev;
652 if (vlan->fwd_priv) {
653 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
655 vlan->fwd_priv = NULL;
659 dev_uc_unsync(lowerdev, dev);
660 dev_mc_unsync(lowerdev, dev);
662 if (vlan->port->passthru) {
663 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
664 dev_set_promiscuity(lowerdev, -1);
668 if (dev->flags & IFF_ALLMULTI)
669 dev_set_allmulti(lowerdev, -1);
671 if (dev->flags & IFF_PROMISC)
672 dev_set_promiscuity(lowerdev, -1);
674 dev_uc_del(lowerdev, dev->dev_addr);
677 macvlan_hash_del(vlan, !dev->dismantle);
681 static int macvlan_sync_address(struct net_device *dev, unsigned char *addr)
683 struct macvlan_dev *vlan = netdev_priv(dev);
684 struct net_device *lowerdev = vlan->lowerdev;
687 if (!(dev->flags & IFF_UP)) {
688 /* Just copy in the new address */
689 ether_addr_copy(dev->dev_addr, addr);
691 /* Rehash and update the device filters */
692 if (macvlan_addr_busy(vlan->port, addr))
695 if (!vlan->port->passthru) {
696 err = dev_uc_add(lowerdev, addr);
700 dev_uc_del(lowerdev, dev->dev_addr);
703 macvlan_hash_change_addr(vlan, addr);
708 static int macvlan_set_mac_address(struct net_device *dev, void *p)
710 struct macvlan_dev *vlan = netdev_priv(dev);
711 struct sockaddr *addr = p;
713 if (!is_valid_ether_addr(addr->sa_data))
714 return -EADDRNOTAVAIL;
716 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
717 dev_set_mac_address(vlan->lowerdev, addr);
721 return macvlan_sync_address(dev, addr->sa_data);
724 static void macvlan_change_rx_flags(struct net_device *dev, int change)
726 struct macvlan_dev *vlan = netdev_priv(dev);
727 struct net_device *lowerdev = vlan->lowerdev;
729 if (dev->flags & IFF_UP) {
730 if (change & IFF_ALLMULTI)
731 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
732 if (change & IFF_PROMISC)
733 dev_set_promiscuity(lowerdev,
734 dev->flags & IFF_PROMISC ? 1 : -1);
739 static void macvlan_compute_filter(unsigned long *mc_filter,
740 struct net_device *dev,
741 struct macvlan_dev *vlan)
743 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
744 bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ);
746 struct netdev_hw_addr *ha;
747 DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
749 bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
750 netdev_for_each_mc_addr(ha, dev) {
751 __set_bit(mc_hash(vlan, ha->addr), filter);
754 __set_bit(mc_hash(vlan, dev->broadcast), filter);
756 bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ);
760 static void macvlan_set_mac_lists(struct net_device *dev)
762 struct macvlan_dev *vlan = netdev_priv(dev);
764 macvlan_compute_filter(vlan->mc_filter, dev, vlan);
766 dev_uc_sync(vlan->lowerdev, dev);
767 dev_mc_sync(vlan->lowerdev, dev);
769 /* This is slightly inaccurate as we're including the subscription
770 * list of vlan->lowerdev too.
772 * Bug alert: This only works if everyone has the same broadcast
773 * address as lowerdev. As soon as someone changes theirs this
776 * However, this is already broken as when you change your broadcast
777 * address we don't get called.
779 * The solution is to maintain a list of broadcast addresses like
780 * we do for uc/mc, if you care.
782 macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL);
785 static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
787 struct macvlan_dev *vlan = netdev_priv(dev);
789 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
796 * macvlan network devices have devices nesting below it and are a special
797 * "super class" of normal network devices; split their locks off into a
798 * separate class since they always nest.
800 static struct lock_class_key macvlan_netdev_addr_lock_key;
802 #define ALWAYS_ON_FEATURES \
803 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \
806 #define MACVLAN_FEATURES \
807 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
808 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \
809 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
810 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
812 #define MACVLAN_STATE_MASK \
813 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
815 static int macvlan_get_nest_level(struct net_device *dev)
817 return ((struct macvlan_dev *)netdev_priv(dev))->nest_level;
820 static void macvlan_set_lockdep_class(struct net_device *dev)
822 netdev_lockdep_set_classes(dev);
823 lockdep_set_class_and_subclass(&dev->addr_list_lock,
824 &macvlan_netdev_addr_lock_key,
825 macvlan_get_nest_level(dev));
828 static int macvlan_init(struct net_device *dev)
830 struct macvlan_dev *vlan = netdev_priv(dev);
831 const struct net_device *lowerdev = vlan->lowerdev;
832 struct macvlan_port *port = vlan->port;
834 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
835 (lowerdev->state & MACVLAN_STATE_MASK);
836 dev->features = lowerdev->features & MACVLAN_FEATURES;
837 dev->features |= ALWAYS_ON_FEATURES;
838 dev->hw_features |= NETIF_F_LRO;
839 dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES;
840 dev->gso_max_size = lowerdev->gso_max_size;
841 dev->gso_max_segs = lowerdev->gso_max_segs;
842 dev->hard_header_len = lowerdev->hard_header_len;
844 macvlan_set_lockdep_class(dev);
846 vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
847 if (!vlan->pcpu_stats)
855 static void macvlan_uninit(struct net_device *dev)
857 struct macvlan_dev *vlan = netdev_priv(dev);
858 struct macvlan_port *port = vlan->port;
860 free_percpu(vlan->pcpu_stats);
862 macvlan_flush_sources(port, vlan);
865 macvlan_port_destroy(port->dev);
868 static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
869 struct rtnl_link_stats64 *stats)
871 struct macvlan_dev *vlan = netdev_priv(dev);
873 if (vlan->pcpu_stats) {
874 struct vlan_pcpu_stats *p;
875 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
876 u32 rx_errors = 0, tx_dropped = 0;
880 for_each_possible_cpu(i) {
881 p = per_cpu_ptr(vlan->pcpu_stats, i);
883 start = u64_stats_fetch_begin_irq(&p->syncp);
884 rx_packets = p->rx_packets;
885 rx_bytes = p->rx_bytes;
886 rx_multicast = p->rx_multicast;
887 tx_packets = p->tx_packets;
888 tx_bytes = p->tx_bytes;
889 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
891 stats->rx_packets += rx_packets;
892 stats->rx_bytes += rx_bytes;
893 stats->multicast += rx_multicast;
894 stats->tx_packets += tx_packets;
895 stats->tx_bytes += tx_bytes;
896 /* rx_errors & tx_dropped are u32, updated
897 * without syncp protection.
899 rx_errors += p->rx_errors;
900 tx_dropped += p->tx_dropped;
902 stats->rx_errors = rx_errors;
903 stats->rx_dropped = rx_errors;
904 stats->tx_dropped = tx_dropped;
909 static int macvlan_vlan_rx_add_vid(struct net_device *dev,
910 __be16 proto, u16 vid)
912 struct macvlan_dev *vlan = netdev_priv(dev);
913 struct net_device *lowerdev = vlan->lowerdev;
915 return vlan_vid_add(lowerdev, proto, vid);
918 static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
919 __be16 proto, u16 vid)
921 struct macvlan_dev *vlan = netdev_priv(dev);
922 struct net_device *lowerdev = vlan->lowerdev;
924 vlan_vid_del(lowerdev, proto, vid);
928 static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
929 struct net_device *dev,
930 const unsigned char *addr, u16 vid,
933 struct macvlan_dev *vlan = netdev_priv(dev);
936 /* Support unicast filter only on passthru devices.
937 * Multicast filter should be allowed on all devices.
939 if (!vlan->port->passthru && is_unicast_ether_addr(addr))
942 if (flags & NLM_F_REPLACE)
945 if (is_unicast_ether_addr(addr))
946 err = dev_uc_add_excl(dev, addr);
947 else if (is_multicast_ether_addr(addr))
948 err = dev_mc_add_excl(dev, addr);
953 static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
954 struct net_device *dev,
955 const unsigned char *addr, u16 vid)
957 struct macvlan_dev *vlan = netdev_priv(dev);
960 /* Support unicast filter only on passthru devices.
961 * Multicast filter should be allowed on all devices.
963 if (!vlan->port->passthru && is_unicast_ether_addr(addr))
966 if (is_unicast_ether_addr(addr))
967 err = dev_uc_del(dev, addr);
968 else if (is_multicast_ether_addr(addr))
969 err = dev_mc_del(dev, addr);
974 static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
975 struct ethtool_drvinfo *drvinfo)
977 strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
978 strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
981 static int macvlan_ethtool_get_link_ksettings(struct net_device *dev,
982 struct ethtool_link_ksettings *cmd)
984 const struct macvlan_dev *vlan = netdev_priv(dev);
986 return __ethtool_get_link_ksettings(vlan->lowerdev, cmd);
989 static netdev_features_t macvlan_fix_features(struct net_device *dev,
990 netdev_features_t features)
992 struct macvlan_dev *vlan = netdev_priv(dev);
993 netdev_features_t lowerdev_features = vlan->lowerdev->features;
994 netdev_features_t mask;
996 features |= NETIF_F_ALL_FOR_ALL;
997 features &= (vlan->set_features | ~MACVLAN_FEATURES);
1000 lowerdev_features &= (features | ~NETIF_F_LRO);
1001 features = netdev_increment_features(lowerdev_features, features, mask);
1002 features |= ALWAYS_ON_FEATURES;
1003 features &= ~NETIF_F_NETNS_LOCAL;
1008 #ifdef CONFIG_NET_POLL_CONTROLLER
1009 static void macvlan_dev_poll_controller(struct net_device *dev)
1014 static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
1016 struct macvlan_dev *vlan = netdev_priv(dev);
1017 struct net_device *real_dev = vlan->lowerdev;
1018 struct netpoll *netpoll;
1021 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
1026 err = __netpoll_setup(netpoll, real_dev);
1032 vlan->netpoll = netpoll;
1038 static void macvlan_dev_netpoll_cleanup(struct net_device *dev)
1040 struct macvlan_dev *vlan = netdev_priv(dev);
1041 struct netpoll *netpoll = vlan->netpoll;
1046 vlan->netpoll = NULL;
1048 __netpoll_free_async(netpoll);
1050 #endif /* CONFIG_NET_POLL_CONTROLLER */
1052 static int macvlan_dev_get_iflink(const struct net_device *dev)
1054 struct macvlan_dev *vlan = netdev_priv(dev);
1056 return vlan->lowerdev->ifindex;
1059 static const struct ethtool_ops macvlan_ethtool_ops = {
1060 .get_link = ethtool_op_get_link,
1061 .get_link_ksettings = macvlan_ethtool_get_link_ksettings,
1062 .get_drvinfo = macvlan_ethtool_get_drvinfo,
1065 static const struct net_device_ops macvlan_netdev_ops = {
1066 .ndo_init = macvlan_init,
1067 .ndo_uninit = macvlan_uninit,
1068 .ndo_open = macvlan_open,
1069 .ndo_stop = macvlan_stop,
1070 .ndo_start_xmit = macvlan_start_xmit,
1071 .ndo_change_mtu = macvlan_change_mtu,
1072 .ndo_fix_features = macvlan_fix_features,
1073 .ndo_change_rx_flags = macvlan_change_rx_flags,
1074 .ndo_set_mac_address = macvlan_set_mac_address,
1075 .ndo_set_rx_mode = macvlan_set_mac_lists,
1076 .ndo_get_stats64 = macvlan_dev_get_stats64,
1077 .ndo_validate_addr = eth_validate_addr,
1078 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
1079 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
1080 .ndo_fdb_add = macvlan_fdb_add,
1081 .ndo_fdb_del = macvlan_fdb_del,
1082 .ndo_fdb_dump = ndo_dflt_fdb_dump,
1083 .ndo_get_lock_subclass = macvlan_get_nest_level,
1084 #ifdef CONFIG_NET_POLL_CONTROLLER
1085 .ndo_poll_controller = macvlan_dev_poll_controller,
1086 .ndo_netpoll_setup = macvlan_dev_netpoll_setup,
1087 .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup,
1089 .ndo_get_iflink = macvlan_dev_get_iflink,
1090 .ndo_features_check = passthru_features_check,
1093 void macvlan_common_setup(struct net_device *dev)
1097 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1098 netif_keep_dst(dev);
1099 dev->priv_flags |= IFF_UNICAST_FLT;
1100 dev->netdev_ops = &macvlan_netdev_ops;
1101 dev->destructor = free_netdev;
1102 dev->header_ops = &macvlan_hard_header_ops;
1103 dev->ethtool_ops = &macvlan_ethtool_ops;
1105 EXPORT_SYMBOL_GPL(macvlan_common_setup);
1107 static void macvlan_setup(struct net_device *dev)
1109 macvlan_common_setup(dev);
1110 dev->priv_flags |= IFF_NO_QUEUE;
1113 static int macvlan_port_create(struct net_device *dev)
1115 struct macvlan_port *port;
1119 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
1122 if (netif_is_ipvlan_port(dev))
1125 port = kzalloc(sizeof(*port), GFP_KERNEL);
1129 port->passthru = false;
1131 INIT_LIST_HEAD(&port->vlans);
1132 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1133 INIT_HLIST_HEAD(&port->vlan_hash[i]);
1134 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1135 INIT_HLIST_HEAD(&port->vlan_source_hash[i]);
1137 skb_queue_head_init(&port->bc_queue);
1138 INIT_WORK(&port->bc_work, macvlan_process_broadcast);
1140 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
1144 dev->priv_flags |= IFF_MACVLAN_PORT;
1148 static void macvlan_port_destroy(struct net_device *dev)
1150 struct macvlan_port *port = macvlan_port_get_rtnl(dev);
1151 struct sk_buff *skb;
1153 dev->priv_flags &= ~IFF_MACVLAN_PORT;
1154 netdev_rx_handler_unregister(dev);
1156 /* After this point, no packet can schedule bc_work anymore,
1157 * but we need to cancel it and purge left skbs if any.
1159 cancel_work_sync(&port->bc_work);
1161 while ((skb = __skb_dequeue(&port->bc_queue))) {
1162 const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
1170 kfree_rcu(port, rcu);
1173 static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
1175 if (tb[IFLA_ADDRESS]) {
1176 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1178 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1179 return -EADDRNOTAVAIL;
1182 if (data && data[IFLA_MACVLAN_FLAGS] &&
1183 nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)
1186 if (data && data[IFLA_MACVLAN_MODE]) {
1187 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
1188 case MACVLAN_MODE_PRIVATE:
1189 case MACVLAN_MODE_VEPA:
1190 case MACVLAN_MODE_BRIDGE:
1191 case MACVLAN_MODE_PASSTHRU:
1192 case MACVLAN_MODE_SOURCE:
1199 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1200 switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) {
1201 case MACVLAN_MACADDR_ADD:
1202 case MACVLAN_MACADDR_DEL:
1203 case MACVLAN_MACADDR_FLUSH:
1204 case MACVLAN_MACADDR_SET:
1211 if (data && data[IFLA_MACVLAN_MACADDR]) {
1212 if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN)
1215 if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR])))
1216 return -EADDRNOTAVAIL;
1219 if (data && data[IFLA_MACVLAN_MACADDR_COUNT])
1226 * reconfigure list of remote source mac address
1227 * (only for macvlan devices in source mode)
1228 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1229 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1231 static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode,
1232 struct nlattr *data[])
1236 struct nlattr *nla, *head;
1237 struct macvlan_source_entry *entry;
1239 if (data[IFLA_MACVLAN_MACADDR])
1240 addr = nla_data(data[IFLA_MACVLAN_MACADDR]);
1242 if (mode == MACVLAN_MACADDR_ADD) {
1246 return macvlan_hash_add_source(vlan, addr);
1248 } else if (mode == MACVLAN_MACADDR_DEL) {
1252 entry = macvlan_hash_lookup_source(vlan, addr);
1254 macvlan_hash_del_source(entry);
1255 vlan->macaddr_count--;
1257 } else if (mode == MACVLAN_MACADDR_FLUSH) {
1258 macvlan_flush_sources(vlan->port, vlan);
1259 } else if (mode == MACVLAN_MACADDR_SET) {
1260 macvlan_flush_sources(vlan->port, vlan);
1263 ret = macvlan_hash_add_source(vlan, addr);
1268 if (!data || !data[IFLA_MACVLAN_MACADDR_DATA])
1271 head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]);
1272 len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]);
1274 nla_for_each_attr(nla, head, len, rem) {
1275 if (nla_type(nla) != IFLA_MACVLAN_MACADDR ||
1276 nla_len(nla) != ETH_ALEN)
1279 addr = nla_data(nla);
1280 ret = macvlan_hash_add_source(vlan, addr);
1291 int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
1292 struct nlattr *tb[], struct nlattr *data[])
1294 struct macvlan_dev *vlan = netdev_priv(dev);
1295 struct macvlan_port *port;
1296 struct net_device *lowerdev;
1299 bool create = false;
1304 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
1305 if (lowerdev == NULL)
1308 /* When creating macvlans or macvtaps on top of other macvlans - use
1309 * the real device as the lowerdev.
1311 if (netif_is_macvlan(lowerdev))
1312 lowerdev = macvlan_dev_real_dev(lowerdev);
1315 dev->mtu = lowerdev->mtu;
1316 else if (dev->mtu > lowerdev->mtu)
1319 if (!tb[IFLA_ADDRESS])
1320 eth_hw_addr_random(dev);
1322 if (!macvlan_port_exists(lowerdev)) {
1323 err = macvlan_port_create(lowerdev);
1328 port = macvlan_port_get_rtnl(lowerdev);
1330 /* Only 1 macvlan device can be created in passthru mode */
1331 if (port->passthru) {
1332 /* The macvlan port must be not created this time,
1333 * still goto destroy_macvlan_port for readability.
1336 goto destroy_macvlan_port;
1339 vlan->lowerdev = lowerdev;
1342 vlan->set_features = MACVLAN_FEATURES;
1343 vlan->nest_level = dev_get_nest_level(lowerdev) + 1;
1345 vlan->mode = MACVLAN_MODE_VEPA;
1346 if (data && data[IFLA_MACVLAN_MODE])
1347 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1349 if (data && data[IFLA_MACVLAN_FLAGS])
1350 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1352 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
1355 goto destroy_macvlan_port;
1357 port->passthru = true;
1358 eth_hw_addr_inherit(dev, lowerdev);
1361 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1362 if (vlan->mode != MACVLAN_MODE_SOURCE) {
1364 goto destroy_macvlan_port;
1366 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1367 err = macvlan_changelink_sources(vlan, macmode, data);
1369 goto destroy_macvlan_port;
1372 err = register_netdevice(dev);
1374 goto destroy_macvlan_port;
1376 dev->priv_flags |= IFF_MACVLAN;
1377 err = netdev_upper_dev_link(lowerdev, dev);
1379 goto unregister_netdev;
1381 list_add_tail_rcu(&vlan->list, &port->vlans);
1382 netif_stacked_transfer_operstate(lowerdev, dev);
1383 linkwatch_fire_event(dev);
1388 /* macvlan_uninit would free the macvlan port */
1389 unregister_netdevice(dev);
1391 destroy_macvlan_port:
1392 /* the macvlan port may be freed by macvlan_uninit when fail to register.
1393 * so we destroy the macvlan port only when it's valid.
1395 if (create && macvlan_port_get_rtnl(lowerdev))
1396 macvlan_port_destroy(port->dev);
1399 EXPORT_SYMBOL_GPL(macvlan_common_newlink);
1401 static int macvlan_newlink(struct net *src_net, struct net_device *dev,
1402 struct nlattr *tb[], struct nlattr *data[])
1404 return macvlan_common_newlink(src_net, dev, tb, data);
1407 void macvlan_dellink(struct net_device *dev, struct list_head *head)
1409 struct macvlan_dev *vlan = netdev_priv(dev);
1411 if (vlan->mode == MACVLAN_MODE_SOURCE)
1412 macvlan_flush_sources(vlan->port, vlan);
1413 list_del_rcu(&vlan->list);
1414 unregister_netdevice_queue(dev, head);
1415 netdev_upper_dev_unlink(vlan->lowerdev, dev);
1417 EXPORT_SYMBOL_GPL(macvlan_dellink);
1419 static int macvlan_changelink(struct net_device *dev,
1420 struct nlattr *tb[], struct nlattr *data[])
1422 struct macvlan_dev *vlan = netdev_priv(dev);
1423 enum macvlan_mode mode;
1424 bool set_mode = false;
1425 enum macvlan_macaddr_mode macmode;
1428 /* Validate mode, but don't set yet: setting flags may fail. */
1429 if (data && data[IFLA_MACVLAN_MODE]) {
1431 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1432 /* Passthrough mode can't be set or cleared dynamically */
1433 if ((mode == MACVLAN_MODE_PASSTHRU) !=
1434 (vlan->mode == MACVLAN_MODE_PASSTHRU))
1436 if (vlan->mode == MACVLAN_MODE_SOURCE &&
1438 macvlan_flush_sources(vlan->port, vlan);
1441 if (data && data[IFLA_MACVLAN_FLAGS]) {
1442 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1443 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
1444 if (vlan->port->passthru && promisc) {
1447 if (flags & MACVLAN_FLAG_NOPROMISC)
1448 err = dev_set_promiscuity(vlan->lowerdev, -1);
1450 err = dev_set_promiscuity(vlan->lowerdev, 1);
1454 vlan->flags = flags;
1458 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1459 if (vlan->mode != MACVLAN_MODE_SOURCE)
1461 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1462 ret = macvlan_changelink_sources(vlan, macmode, data);
1469 static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan)
1471 if (vlan->macaddr_count == 0)
1473 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1474 + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN);
1477 static size_t macvlan_get_size(const struct net_device *dev)
1479 struct macvlan_dev *vlan = netdev_priv(dev);
1482 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1483 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1484 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1485 + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */
1489 static int macvlan_fill_info_macaddr(struct sk_buff *skb,
1490 const struct macvlan_dev *vlan,
1493 struct hlist_head *h = &vlan->port->vlan_source_hash[i];
1494 struct macvlan_source_entry *entry;
1496 hlist_for_each_entry_rcu(entry, h, hlist) {
1497 if (entry->vlan != vlan)
1499 if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr))
1505 static int macvlan_fill_info(struct sk_buff *skb,
1506 const struct net_device *dev)
1508 struct macvlan_dev *vlan = netdev_priv(dev);
1510 struct nlattr *nest;
1512 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
1513 goto nla_put_failure;
1514 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
1515 goto nla_put_failure;
1516 if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count))
1517 goto nla_put_failure;
1518 if (vlan->macaddr_count > 0) {
1519 nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA);
1521 goto nla_put_failure;
1523 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
1524 if (macvlan_fill_info_macaddr(skb, vlan, i))
1525 goto nla_put_failure;
1527 nla_nest_end(skb, nest);
1535 static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
1536 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
1537 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
1538 [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 },
1539 [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1540 [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED },
1541 [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 },
1544 int macvlan_link_register(struct rtnl_link_ops *ops)
1547 ops->priv_size = sizeof(struct macvlan_dev);
1548 ops->validate = macvlan_validate;
1549 ops->maxtype = IFLA_MACVLAN_MAX;
1550 ops->policy = macvlan_policy;
1551 ops->changelink = macvlan_changelink;
1552 ops->get_size = macvlan_get_size;
1553 ops->fill_info = macvlan_fill_info;
1555 return rtnl_link_register(ops);
1557 EXPORT_SYMBOL_GPL(macvlan_link_register);
1559 static struct net *macvlan_get_link_net(const struct net_device *dev)
1561 return dev_net(macvlan_dev_real_dev(dev));
1564 static struct rtnl_link_ops macvlan_link_ops = {
1566 .setup = macvlan_setup,
1567 .newlink = macvlan_newlink,
1568 .dellink = macvlan_dellink,
1569 .get_link_net = macvlan_get_link_net,
1572 static int macvlan_device_event(struct notifier_block *unused,
1573 unsigned long event, void *ptr)
1575 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1576 struct macvlan_dev *vlan, *next;
1577 struct macvlan_port *port;
1578 LIST_HEAD(list_kill);
1580 if (!macvlan_port_exists(dev))
1583 port = macvlan_port_get_rtnl(dev);
1588 list_for_each_entry(vlan, &port->vlans, list)
1589 netif_stacked_transfer_operstate(vlan->lowerdev,
1592 case NETDEV_FEAT_CHANGE:
1593 list_for_each_entry(vlan, &port->vlans, list) {
1594 vlan->dev->gso_max_size = dev->gso_max_size;
1595 vlan->dev->gso_max_segs = dev->gso_max_segs;
1596 netdev_update_features(vlan->dev);
1599 case NETDEV_CHANGEMTU:
1600 list_for_each_entry(vlan, &port->vlans, list) {
1601 if (vlan->dev->mtu <= dev->mtu)
1603 dev_set_mtu(vlan->dev, dev->mtu);
1606 case NETDEV_CHANGEADDR:
1607 if (!port->passthru)
1610 vlan = list_first_entry_or_null(&port->vlans,
1614 if (vlan && macvlan_sync_address(vlan->dev, dev->dev_addr))
1618 case NETDEV_UNREGISTER:
1619 /* twiddle thumbs on netns device moves */
1620 if (dev->reg_state != NETREG_UNREGISTERING)
1623 list_for_each_entry_safe(vlan, next, &port->vlans, list)
1624 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
1625 unregister_netdevice_many(&list_kill);
1627 case NETDEV_PRE_TYPE_CHANGE:
1628 /* Forbid underlaying device to change its type. */
1631 case NETDEV_NOTIFY_PEERS:
1632 case NETDEV_BONDING_FAILOVER:
1633 case NETDEV_RESEND_IGMP:
1634 /* Propagate to all vlans */
1635 list_for_each_entry(vlan, &port->vlans, list)
1636 call_netdevice_notifiers(event, vlan->dev);
1641 static struct notifier_block macvlan_notifier_block __read_mostly = {
1642 .notifier_call = macvlan_device_event,
1645 static int __init macvlan_init_module(void)
1649 register_netdevice_notifier(&macvlan_notifier_block);
1651 err = macvlan_link_register(&macvlan_link_ops);
1656 unregister_netdevice_notifier(&macvlan_notifier_block);
1660 static void __exit macvlan_cleanup_module(void)
1662 rtnl_link_unregister(&macvlan_link_ops);
1663 unregister_netdevice_notifier(&macvlan_notifier_block);
1666 module_init(macvlan_init_module);
1667 module_exit(macvlan_cleanup_module);
1669 MODULE_LICENSE("GPL");
1670 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1671 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1672 MODULE_ALIAS_RTNL_LINK("macvlan");