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
42 #define MACVLAN_F_PASSTHRU 1
43 #define MACVLAN_F_ADDRCHANGE 2
46 struct net_device *dev;
47 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
48 struct list_head vlans;
49 struct sk_buff_head bc_queue;
50 struct work_struct bc_work;
53 struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE];
54 DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
55 unsigned char perm_addr[ETH_ALEN];
58 struct macvlan_source_entry {
59 struct hlist_node hlist;
60 struct macvlan_dev *vlan;
61 unsigned char addr[6+2] __aligned(sizeof(u16));
65 struct macvlan_skb_cb {
66 const struct macvlan_dev *src;
69 #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
71 static void macvlan_port_destroy(struct net_device *dev);
73 static inline bool macvlan_passthru(const struct macvlan_port *port)
75 return port->flags & MACVLAN_F_PASSTHRU;
78 static inline void macvlan_set_passthru(struct macvlan_port *port)
80 port->flags |= MACVLAN_F_PASSTHRU;
83 static inline bool macvlan_addr_change(const struct macvlan_port *port)
85 return port->flags & MACVLAN_F_ADDRCHANGE;
88 static inline void macvlan_set_addr_change(struct macvlan_port *port)
90 port->flags |= MACVLAN_F_ADDRCHANGE;
93 static inline void macvlan_clear_addr_change(struct macvlan_port *port)
95 port->flags &= ~MACVLAN_F_ADDRCHANGE;
98 /* Hash Ethernet address */
99 static u32 macvlan_eth_hash(const unsigned char *addr)
101 u64 value = get_unaligned((u64 *)addr);
103 /* only want 6 bytes */
109 return hash_64(value, MACVLAN_HASH_BITS);
112 static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
114 return rcu_dereference(dev->rx_handler_data);
117 static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev)
119 return rtnl_dereference(dev->rx_handler_data);
122 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
124 static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
125 const unsigned char *addr)
127 struct macvlan_dev *vlan;
128 u32 idx = macvlan_eth_hash(addr);
130 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) {
131 if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr))
137 static struct macvlan_source_entry *macvlan_hash_lookup_source(
138 const struct macvlan_dev *vlan,
139 const unsigned char *addr)
141 struct macvlan_source_entry *entry;
142 u32 idx = macvlan_eth_hash(addr);
143 struct hlist_head *h = &vlan->port->vlan_source_hash[idx];
145 hlist_for_each_entry_rcu(entry, h, hlist) {
146 if (ether_addr_equal_64bits(entry->addr, addr) &&
153 static int macvlan_hash_add_source(struct macvlan_dev *vlan,
154 const unsigned char *addr)
156 struct macvlan_port *port = vlan->port;
157 struct macvlan_source_entry *entry;
158 struct hlist_head *h;
160 entry = macvlan_hash_lookup_source(vlan, addr);
164 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
168 ether_addr_copy(entry->addr, addr);
170 h = &port->vlan_source_hash[macvlan_eth_hash(addr)];
171 hlist_add_head_rcu(&entry->hlist, h);
172 vlan->macaddr_count++;
177 static void macvlan_hash_add(struct macvlan_dev *vlan)
179 struct macvlan_port *port = vlan->port;
180 const unsigned char *addr = vlan->dev->dev_addr;
181 u32 idx = macvlan_eth_hash(addr);
183 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]);
186 static void macvlan_hash_del_source(struct macvlan_source_entry *entry)
188 hlist_del_rcu(&entry->hlist);
189 kfree_rcu(entry, rcu);
192 static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
194 hlist_del_rcu(&vlan->hlist);
199 static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
200 const unsigned char *addr)
202 macvlan_hash_del(vlan, true);
203 /* Now that we are unhashed it is safe to change the device
204 * address without confusing packet delivery.
206 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
207 macvlan_hash_add(vlan);
210 static bool macvlan_addr_busy(const struct macvlan_port *port,
211 const unsigned char *addr)
213 /* Test to see if the specified address is
214 * currently in use by the underlying device or
217 if (!macvlan_passthru(port) && !macvlan_addr_change(port) &&
218 ether_addr_equal_64bits(port->dev->dev_addr, addr))
221 if (macvlan_hash_lookup(port, addr))
228 static int macvlan_broadcast_one(struct sk_buff *skb,
229 const struct macvlan_dev *vlan,
230 const struct ethhdr *eth, bool local)
232 struct net_device *dev = vlan->dev;
235 return __dev_forward_skb(dev, skb);
238 if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
239 skb->pkt_type = PACKET_BROADCAST;
241 skb->pkt_type = PACKET_MULTICAST;
246 static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
248 return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT);
252 static unsigned int mc_hash(const struct macvlan_dev *vlan,
253 const unsigned char *addr)
255 u32 val = __get_unaligned_cpu32(addr + 2);
257 val ^= macvlan_hash_mix(vlan);
258 return hash_32(val, MACVLAN_MC_FILTER_BITS);
261 static void macvlan_broadcast(struct sk_buff *skb,
262 const struct macvlan_port *port,
263 struct net_device *src,
264 enum macvlan_mode mode)
266 const struct ethhdr *eth = eth_hdr(skb);
267 const struct macvlan_dev *vlan;
268 struct sk_buff *nskb;
273 if (skb->protocol == htons(ETH_P_PAUSE))
276 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
277 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) {
278 if (vlan->dev == src || !(vlan->mode & mode))
281 hash = mc_hash(vlan, eth->h_dest);
282 if (!test_bit(hash, vlan->mc_filter))
286 nskb = skb_clone(skb, GFP_ATOMIC);
288 err = macvlan_broadcast_one(
290 mode == MACVLAN_MODE_BRIDGE) ?:
292 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
293 err == NET_RX_SUCCESS, true);
298 static void macvlan_process_broadcast(struct work_struct *w)
300 struct macvlan_port *port = container_of(w, struct macvlan_port,
303 struct sk_buff_head list;
305 __skb_queue_head_init(&list);
307 spin_lock_bh(&port->bc_queue.lock);
308 skb_queue_splice_tail_init(&port->bc_queue, &list);
309 spin_unlock_bh(&port->bc_queue.lock);
311 while ((skb = __skb_dequeue(&list))) {
312 const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
317 /* frame comes from an external address */
318 macvlan_broadcast(skb, port, NULL,
319 MACVLAN_MODE_PRIVATE |
321 MACVLAN_MODE_PASSTHRU|
322 MACVLAN_MODE_BRIDGE);
323 else if (src->mode == MACVLAN_MODE_VEPA)
324 /* flood to everyone except source */
325 macvlan_broadcast(skb, port, src->dev,
327 MACVLAN_MODE_BRIDGE);
330 * flood only to VEPA ports, bridge ports
331 * already saw the frame on the way out.
333 macvlan_broadcast(skb, port, src->dev,
344 static void macvlan_broadcast_enqueue(struct macvlan_port *port,
345 const struct macvlan_dev *src,
348 struct sk_buff *nskb;
351 nskb = skb_clone(skb, GFP_ATOMIC);
355 MACVLAN_SKB_CB(nskb)->src = src;
357 spin_lock(&port->bc_queue.lock);
358 if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) {
361 __skb_queue_tail(&port->bc_queue, nskb);
364 spin_unlock(&port->bc_queue.lock);
369 schedule_work(&port->bc_work);
375 atomic_long_inc(&skb->dev->rx_dropped);
378 static void macvlan_flush_sources(struct macvlan_port *port,
379 struct macvlan_dev *vlan)
383 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
384 struct hlist_node *h, *n;
386 hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) {
387 struct macvlan_source_entry *entry;
389 entry = hlist_entry(h, struct macvlan_source_entry,
391 if (entry->vlan == vlan)
392 macvlan_hash_del_source(entry);
395 vlan->macaddr_count = 0;
398 static void macvlan_forward_source_one(struct sk_buff *skb,
399 struct macvlan_dev *vlan)
401 struct sk_buff *nskb;
402 struct net_device *dev;
407 if (unlikely(!(dev->flags & IFF_UP)))
410 nskb = skb_clone(skb, GFP_ATOMIC);
414 len = nskb->len + ETH_HLEN;
416 nskb->pkt_type = PACKET_HOST;
418 ret = netif_rx(nskb);
419 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
422 static void macvlan_forward_source(struct sk_buff *skb,
423 struct macvlan_port *port,
424 const unsigned char *addr)
426 struct macvlan_source_entry *entry;
427 u32 idx = macvlan_eth_hash(addr);
428 struct hlist_head *h = &port->vlan_source_hash[idx];
430 hlist_for_each_entry_rcu(entry, h, hlist) {
431 if (ether_addr_equal_64bits(entry->addr, addr))
432 macvlan_forward_source_one(skb, entry->vlan);
436 /* called under rcu_read_lock() from netif_receive_skb */
437 static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
439 struct macvlan_port *port;
440 struct sk_buff *skb = *pskb;
441 const struct ethhdr *eth = eth_hdr(skb);
442 const struct macvlan_dev *vlan;
443 const struct macvlan_dev *src;
444 struct net_device *dev;
445 unsigned int len = 0;
447 rx_handler_result_t handle_res;
449 port = macvlan_port_get_rcu(skb->dev);
450 if (is_multicast_ether_addr(eth->h_dest)) {
453 skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN);
455 return RX_HANDLER_CONSUMED;
458 macvlan_forward_source(skb, port, eth->h_source);
459 src = macvlan_hash_lookup(port, eth->h_source);
460 if (src && src->mode != MACVLAN_MODE_VEPA &&
461 src->mode != MACVLAN_MODE_BRIDGE) {
462 /* forward to original port. */
464 ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?:
466 handle_res = RX_HANDLER_CONSUMED;
470 hash = mc_hash(NULL, eth->h_dest);
471 if (test_bit(hash, port->mc_filter))
472 macvlan_broadcast_enqueue(port, src, skb);
474 return RX_HANDLER_PASS;
477 macvlan_forward_source(skb, port, eth->h_source);
478 if (macvlan_passthru(port))
479 vlan = list_first_or_null_rcu(&port->vlans,
480 struct macvlan_dev, list);
482 vlan = macvlan_hash_lookup(port, eth->h_dest);
483 if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE)
484 return RX_HANDLER_PASS;
487 if (unlikely(!(dev->flags & IFF_UP))) {
489 return RX_HANDLER_CONSUMED;
491 len = skb->len + ETH_HLEN;
492 skb = skb_share_check(skb, GFP_ATOMIC);
495 handle_res = RX_HANDLER_CONSUMED;
501 skb->pkt_type = PACKET_HOST;
503 ret = NET_RX_SUCCESS;
504 handle_res = RX_HANDLER_ANOTHER;
506 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
510 static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
512 const struct macvlan_dev *vlan = netdev_priv(dev);
513 const struct macvlan_port *port = vlan->port;
514 const struct macvlan_dev *dest;
516 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
517 const struct ethhdr *eth = (void *)skb->data;
519 /* send to other bridge ports directly */
520 if (is_multicast_ether_addr(eth->h_dest)) {
521 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
525 dest = macvlan_hash_lookup(port, eth->h_dest);
526 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
527 /* send to lowerdev first for its network taps */
528 dev_forward_skb(vlan->lowerdev, skb);
530 return NET_XMIT_SUCCESS;
535 skb->dev = vlan->lowerdev;
536 return dev_queue_xmit(skb);
539 static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb)
541 #ifdef CONFIG_NET_POLL_CONTROLLER
543 netpoll_send_skb(vlan->netpoll, skb);
550 static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
551 struct net_device *dev)
553 unsigned int len = skb->len;
555 struct macvlan_dev *vlan = netdev_priv(dev);
557 if (unlikely(netpoll_tx_running(dev)))
558 return macvlan_netpoll_send_skb(vlan, skb);
560 if (vlan->fwd_priv) {
561 skb->dev = vlan->lowerdev;
562 ret = dev_queue_xmit_accel(skb, vlan->fwd_priv);
564 ret = macvlan_queue_xmit(skb, dev);
567 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
568 struct vlan_pcpu_stats *pcpu_stats;
570 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
571 u64_stats_update_begin(&pcpu_stats->syncp);
572 pcpu_stats->tx_packets++;
573 pcpu_stats->tx_bytes += len;
574 u64_stats_update_end(&pcpu_stats->syncp);
576 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
581 static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
582 unsigned short type, const void *daddr,
583 const void *saddr, unsigned len)
585 const struct macvlan_dev *vlan = netdev_priv(dev);
586 struct net_device *lowerdev = vlan->lowerdev;
588 return dev_hard_header(skb, lowerdev, type, daddr,
589 saddr ? : dev->dev_addr, len);
592 static const struct header_ops macvlan_hard_header_ops = {
593 .create = macvlan_hard_header,
594 .parse = eth_header_parse,
595 .cache = eth_header_cache,
596 .cache_update = eth_header_cache_update,
599 static struct rtnl_link_ops macvlan_link_ops;
601 static int macvlan_open(struct net_device *dev)
603 struct macvlan_dev *vlan = netdev_priv(dev);
604 struct net_device *lowerdev = vlan->lowerdev;
607 if (macvlan_passthru(vlan->port)) {
608 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
609 err = dev_set_promiscuity(lowerdev, 1);
616 if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD &&
617 dev->rtnl_link_ops == &macvlan_link_ops) {
619 lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);
621 /* If we get a NULL pointer back, or if we get an error
622 * then we should just fall through to the non accelerated path
624 if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
625 vlan->fwd_priv = NULL;
631 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
634 err = dev_uc_add(lowerdev, dev->dev_addr);
637 if (dev->flags & IFF_ALLMULTI) {
638 err = dev_set_allmulti(lowerdev, 1);
643 if (dev->flags & IFF_PROMISC) {
644 err = dev_set_promiscuity(lowerdev, 1);
650 macvlan_hash_add(vlan);
654 if (dev->flags & IFF_ALLMULTI)
655 dev_set_allmulti(lowerdev, -1);
657 dev_uc_del(lowerdev, dev->dev_addr);
659 if (vlan->fwd_priv) {
660 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
662 vlan->fwd_priv = NULL;
667 static int macvlan_stop(struct net_device *dev)
669 struct macvlan_dev *vlan = netdev_priv(dev);
670 struct net_device *lowerdev = vlan->lowerdev;
672 if (vlan->fwd_priv) {
673 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
675 vlan->fwd_priv = NULL;
679 dev_uc_unsync(lowerdev, dev);
680 dev_mc_unsync(lowerdev, dev);
682 if (macvlan_passthru(vlan->port)) {
683 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
684 dev_set_promiscuity(lowerdev, -1);
688 if (dev->flags & IFF_ALLMULTI)
689 dev_set_allmulti(lowerdev, -1);
691 if (dev->flags & IFF_PROMISC)
692 dev_set_promiscuity(lowerdev, -1);
694 dev_uc_del(lowerdev, dev->dev_addr);
697 macvlan_hash_del(vlan, !dev->dismantle);
701 static int macvlan_sync_address(struct net_device *dev, unsigned char *addr)
703 struct macvlan_dev *vlan = netdev_priv(dev);
704 struct net_device *lowerdev = vlan->lowerdev;
705 struct macvlan_port *port = vlan->port;
708 if (!(dev->flags & IFF_UP)) {
709 /* Just copy in the new address */
710 ether_addr_copy(dev->dev_addr, addr);
712 /* Rehash and update the device filters */
713 if (macvlan_addr_busy(vlan->port, addr))
716 if (!macvlan_passthru(port)) {
717 err = dev_uc_add(lowerdev, addr);
721 dev_uc_del(lowerdev, dev->dev_addr);
724 macvlan_hash_change_addr(vlan, addr);
726 if (macvlan_passthru(port) && !macvlan_addr_change(port)) {
727 /* Since addr_change isn't set, we are here due to lower
728 * device change. Save the lower-dev address so we can
731 ether_addr_copy(vlan->port->perm_addr,
734 macvlan_clear_addr_change(port);
738 static int macvlan_set_mac_address(struct net_device *dev, void *p)
740 struct macvlan_dev *vlan = netdev_priv(dev);
741 struct sockaddr *addr = p;
743 if (!is_valid_ether_addr(addr->sa_data))
744 return -EADDRNOTAVAIL;
746 /* If the addresses are the same, this is a no-op */
747 if (ether_addr_equal(dev->dev_addr, addr->sa_data))
750 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
751 macvlan_set_addr_change(vlan->port);
752 return dev_set_mac_address(vlan->lowerdev, addr);
755 return macvlan_sync_address(dev, addr->sa_data);
758 static void macvlan_change_rx_flags(struct net_device *dev, int change)
760 struct macvlan_dev *vlan = netdev_priv(dev);
761 struct net_device *lowerdev = vlan->lowerdev;
763 if (dev->flags & IFF_UP) {
764 if (change & IFF_ALLMULTI)
765 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
766 if (change & IFF_PROMISC)
767 dev_set_promiscuity(lowerdev,
768 dev->flags & IFF_PROMISC ? 1 : -1);
773 static void macvlan_compute_filter(unsigned long *mc_filter,
774 struct net_device *dev,
775 struct macvlan_dev *vlan)
777 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
778 bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ);
780 struct netdev_hw_addr *ha;
781 DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
783 bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
784 netdev_for_each_mc_addr(ha, dev) {
785 __set_bit(mc_hash(vlan, ha->addr), filter);
788 __set_bit(mc_hash(vlan, dev->broadcast), filter);
790 bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ);
794 static void macvlan_set_mac_lists(struct net_device *dev)
796 struct macvlan_dev *vlan = netdev_priv(dev);
798 macvlan_compute_filter(vlan->mc_filter, dev, vlan);
800 dev_uc_sync(vlan->lowerdev, dev);
801 dev_mc_sync(vlan->lowerdev, dev);
803 /* This is slightly inaccurate as we're including the subscription
804 * list of vlan->lowerdev too.
806 * Bug alert: This only works if everyone has the same broadcast
807 * address as lowerdev. As soon as someone changes theirs this
810 * However, this is already broken as when you change your broadcast
811 * address we don't get called.
813 * The solution is to maintain a list of broadcast addresses like
814 * we do for uc/mc, if you care.
816 macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL);
819 static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
821 struct macvlan_dev *vlan = netdev_priv(dev);
823 if (vlan->lowerdev->mtu < new_mtu)
830 * macvlan network devices have devices nesting below it and are a special
831 * "super class" of normal network devices; split their locks off into a
832 * separate class since they always nest.
834 static struct lock_class_key macvlan_netdev_addr_lock_key;
836 #define ALWAYS_ON_OFFLOADS \
837 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \
838 NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL)
840 #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX)
842 #define MACVLAN_FEATURES \
843 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
844 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \
845 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
846 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
848 #define MACVLAN_STATE_MASK \
849 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
851 static int macvlan_get_nest_level(struct net_device *dev)
853 return ((struct macvlan_dev *)netdev_priv(dev))->nest_level;
856 static void macvlan_set_lockdep_class(struct net_device *dev)
858 netdev_lockdep_set_classes(dev);
859 lockdep_set_class_and_subclass(&dev->addr_list_lock,
860 &macvlan_netdev_addr_lock_key,
861 macvlan_get_nest_level(dev));
864 static int macvlan_init(struct net_device *dev)
866 struct macvlan_dev *vlan = netdev_priv(dev);
867 const struct net_device *lowerdev = vlan->lowerdev;
868 struct macvlan_port *port = vlan->port;
870 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
871 (lowerdev->state & MACVLAN_STATE_MASK);
872 dev->features = lowerdev->features & MACVLAN_FEATURES;
873 dev->features |= ALWAYS_ON_FEATURES;
874 dev->hw_features |= NETIF_F_LRO;
875 dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES;
876 dev->vlan_features |= ALWAYS_ON_OFFLOADS;
877 dev->hw_enc_features |= dev->features;
878 dev->gso_max_size = lowerdev->gso_max_size;
879 dev->gso_max_segs = lowerdev->gso_max_segs;
880 dev->hard_header_len = lowerdev->hard_header_len;
882 macvlan_set_lockdep_class(dev);
884 vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
885 if (!vlan->pcpu_stats)
893 static void macvlan_uninit(struct net_device *dev)
895 struct macvlan_dev *vlan = netdev_priv(dev);
896 struct macvlan_port *port = vlan->port;
898 free_percpu(vlan->pcpu_stats);
900 macvlan_flush_sources(port, vlan);
903 macvlan_port_destroy(port->dev);
906 static void macvlan_dev_get_stats64(struct net_device *dev,
907 struct rtnl_link_stats64 *stats)
909 struct macvlan_dev *vlan = netdev_priv(dev);
911 if (vlan->pcpu_stats) {
912 struct vlan_pcpu_stats *p;
913 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
914 u32 rx_errors = 0, tx_dropped = 0;
918 for_each_possible_cpu(i) {
919 p = per_cpu_ptr(vlan->pcpu_stats, i);
921 start = u64_stats_fetch_begin_irq(&p->syncp);
922 rx_packets = p->rx_packets;
923 rx_bytes = p->rx_bytes;
924 rx_multicast = p->rx_multicast;
925 tx_packets = p->tx_packets;
926 tx_bytes = p->tx_bytes;
927 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
929 stats->rx_packets += rx_packets;
930 stats->rx_bytes += rx_bytes;
931 stats->multicast += rx_multicast;
932 stats->tx_packets += tx_packets;
933 stats->tx_bytes += tx_bytes;
934 /* rx_errors & tx_dropped are u32, updated
935 * without syncp protection.
937 rx_errors += p->rx_errors;
938 tx_dropped += p->tx_dropped;
940 stats->rx_errors = rx_errors;
941 stats->rx_dropped = rx_errors;
942 stats->tx_dropped = tx_dropped;
946 static int macvlan_vlan_rx_add_vid(struct net_device *dev,
947 __be16 proto, u16 vid)
949 struct macvlan_dev *vlan = netdev_priv(dev);
950 struct net_device *lowerdev = vlan->lowerdev;
952 return vlan_vid_add(lowerdev, proto, vid);
955 static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
956 __be16 proto, u16 vid)
958 struct macvlan_dev *vlan = netdev_priv(dev);
959 struct net_device *lowerdev = vlan->lowerdev;
961 vlan_vid_del(lowerdev, proto, vid);
965 static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
966 struct net_device *dev,
967 const unsigned char *addr, u16 vid,
970 struct macvlan_dev *vlan = netdev_priv(dev);
973 /* Support unicast filter only on passthru devices.
974 * Multicast filter should be allowed on all devices.
976 if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr))
979 if (flags & NLM_F_REPLACE)
982 if (is_unicast_ether_addr(addr))
983 err = dev_uc_add_excl(dev, addr);
984 else if (is_multicast_ether_addr(addr))
985 err = dev_mc_add_excl(dev, addr);
990 static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
991 struct net_device *dev,
992 const unsigned char *addr, u16 vid)
994 struct macvlan_dev *vlan = netdev_priv(dev);
997 /* Support unicast filter only on passthru devices.
998 * Multicast filter should be allowed on all devices.
1000 if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr))
1003 if (is_unicast_ether_addr(addr))
1004 err = dev_uc_del(dev, addr);
1005 else if (is_multicast_ether_addr(addr))
1006 err = dev_mc_del(dev, addr);
1011 static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
1012 struct ethtool_drvinfo *drvinfo)
1014 strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
1015 strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
1018 static int macvlan_ethtool_get_link_ksettings(struct net_device *dev,
1019 struct ethtool_link_ksettings *cmd)
1021 const struct macvlan_dev *vlan = netdev_priv(dev);
1023 return __ethtool_get_link_ksettings(vlan->lowerdev, cmd);
1026 static netdev_features_t macvlan_fix_features(struct net_device *dev,
1027 netdev_features_t features)
1029 struct macvlan_dev *vlan = netdev_priv(dev);
1030 netdev_features_t lowerdev_features = vlan->lowerdev->features;
1031 netdev_features_t mask;
1033 features |= NETIF_F_ALL_FOR_ALL;
1034 features &= (vlan->set_features | ~MACVLAN_FEATURES);
1037 lowerdev_features &= (features | ~NETIF_F_LRO);
1038 features = netdev_increment_features(lowerdev_features, features, mask);
1039 features |= ALWAYS_ON_FEATURES;
1040 features &= ~NETIF_F_NETNS_LOCAL;
1045 #ifdef CONFIG_NET_POLL_CONTROLLER
1046 static void macvlan_dev_poll_controller(struct net_device *dev)
1051 static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
1053 struct macvlan_dev *vlan = netdev_priv(dev);
1054 struct net_device *real_dev = vlan->lowerdev;
1055 struct netpoll *netpoll;
1058 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
1063 err = __netpoll_setup(netpoll, real_dev);
1069 vlan->netpoll = netpoll;
1075 static void macvlan_dev_netpoll_cleanup(struct net_device *dev)
1077 struct macvlan_dev *vlan = netdev_priv(dev);
1078 struct netpoll *netpoll = vlan->netpoll;
1083 vlan->netpoll = NULL;
1085 __netpoll_free_async(netpoll);
1087 #endif /* CONFIG_NET_POLL_CONTROLLER */
1089 static int macvlan_dev_get_iflink(const struct net_device *dev)
1091 struct macvlan_dev *vlan = netdev_priv(dev);
1093 return vlan->lowerdev->ifindex;
1096 static const struct ethtool_ops macvlan_ethtool_ops = {
1097 .get_link = ethtool_op_get_link,
1098 .get_link_ksettings = macvlan_ethtool_get_link_ksettings,
1099 .get_drvinfo = macvlan_ethtool_get_drvinfo,
1102 static const struct net_device_ops macvlan_netdev_ops = {
1103 .ndo_init = macvlan_init,
1104 .ndo_uninit = macvlan_uninit,
1105 .ndo_open = macvlan_open,
1106 .ndo_stop = macvlan_stop,
1107 .ndo_start_xmit = macvlan_start_xmit,
1108 .ndo_change_mtu = macvlan_change_mtu,
1109 .ndo_fix_features = macvlan_fix_features,
1110 .ndo_change_rx_flags = macvlan_change_rx_flags,
1111 .ndo_set_mac_address = macvlan_set_mac_address,
1112 .ndo_set_rx_mode = macvlan_set_mac_lists,
1113 .ndo_get_stats64 = macvlan_dev_get_stats64,
1114 .ndo_validate_addr = eth_validate_addr,
1115 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
1116 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
1117 .ndo_fdb_add = macvlan_fdb_add,
1118 .ndo_fdb_del = macvlan_fdb_del,
1119 .ndo_fdb_dump = ndo_dflt_fdb_dump,
1120 .ndo_get_lock_subclass = macvlan_get_nest_level,
1121 #ifdef CONFIG_NET_POLL_CONTROLLER
1122 .ndo_poll_controller = macvlan_dev_poll_controller,
1123 .ndo_netpoll_setup = macvlan_dev_netpoll_setup,
1124 .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup,
1126 .ndo_get_iflink = macvlan_dev_get_iflink,
1127 .ndo_features_check = passthru_features_check,
1130 void macvlan_common_setup(struct net_device *dev)
1135 dev->max_mtu = ETH_MAX_MTU;
1136 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1137 netif_keep_dst(dev);
1138 dev->priv_flags |= IFF_UNICAST_FLT;
1139 dev->netdev_ops = &macvlan_netdev_ops;
1140 dev->needs_free_netdev = true;
1141 dev->header_ops = &macvlan_hard_header_ops;
1142 dev->ethtool_ops = &macvlan_ethtool_ops;
1144 EXPORT_SYMBOL_GPL(macvlan_common_setup);
1146 static void macvlan_setup(struct net_device *dev)
1148 macvlan_common_setup(dev);
1149 dev->priv_flags |= IFF_NO_QUEUE;
1152 static int macvlan_port_create(struct net_device *dev)
1154 struct macvlan_port *port;
1158 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
1161 if (netdev_is_rx_handler_busy(dev))
1164 port = kzalloc(sizeof(*port), GFP_KERNEL);
1169 ether_addr_copy(port->perm_addr, dev->dev_addr);
1170 INIT_LIST_HEAD(&port->vlans);
1171 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1172 INIT_HLIST_HEAD(&port->vlan_hash[i]);
1173 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1174 INIT_HLIST_HEAD(&port->vlan_source_hash[i]);
1176 skb_queue_head_init(&port->bc_queue);
1177 INIT_WORK(&port->bc_work, macvlan_process_broadcast);
1179 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
1183 dev->priv_flags |= IFF_MACVLAN_PORT;
1187 static void macvlan_port_destroy(struct net_device *dev)
1189 struct macvlan_port *port = macvlan_port_get_rtnl(dev);
1190 struct sk_buff *skb;
1192 dev->priv_flags &= ~IFF_MACVLAN_PORT;
1193 netdev_rx_handler_unregister(dev);
1195 /* After this point, no packet can schedule bc_work anymore,
1196 * but we need to cancel it and purge left skbs if any.
1198 cancel_work_sync(&port->bc_work);
1200 while ((skb = __skb_dequeue(&port->bc_queue))) {
1201 const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
1209 /* If the lower device address has been changed by passthru
1210 * macvlan, put it back.
1212 if (macvlan_passthru(port) &&
1213 !ether_addr_equal(port->dev->dev_addr, port->perm_addr)) {
1216 sa.sa_family = port->dev->type;
1217 memcpy(&sa.sa_data, port->perm_addr, port->dev->addr_len);
1218 dev_set_mac_address(port->dev, &sa);
1224 static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[],
1225 struct netlink_ext_ack *extack)
1227 if (tb[IFLA_ADDRESS]) {
1228 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1230 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1231 return -EADDRNOTAVAIL;
1237 if (data[IFLA_MACVLAN_FLAGS] &&
1238 nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)
1241 if (data[IFLA_MACVLAN_MODE]) {
1242 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
1243 case MACVLAN_MODE_PRIVATE:
1244 case MACVLAN_MODE_VEPA:
1245 case MACVLAN_MODE_BRIDGE:
1246 case MACVLAN_MODE_PASSTHRU:
1247 case MACVLAN_MODE_SOURCE:
1254 if (data[IFLA_MACVLAN_MACADDR_MODE]) {
1255 switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) {
1256 case MACVLAN_MACADDR_ADD:
1257 case MACVLAN_MACADDR_DEL:
1258 case MACVLAN_MACADDR_FLUSH:
1259 case MACVLAN_MACADDR_SET:
1266 if (data[IFLA_MACVLAN_MACADDR]) {
1267 if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN)
1270 if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR])))
1271 return -EADDRNOTAVAIL;
1274 if (data[IFLA_MACVLAN_MACADDR_COUNT])
1281 * reconfigure list of remote source mac address
1282 * (only for macvlan devices in source mode)
1283 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1284 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1286 static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode,
1287 struct nlattr *data[])
1291 struct nlattr *nla, *head;
1292 struct macvlan_source_entry *entry;
1294 if (data[IFLA_MACVLAN_MACADDR])
1295 addr = nla_data(data[IFLA_MACVLAN_MACADDR]);
1297 if (mode == MACVLAN_MACADDR_ADD) {
1301 return macvlan_hash_add_source(vlan, addr);
1303 } else if (mode == MACVLAN_MACADDR_DEL) {
1307 entry = macvlan_hash_lookup_source(vlan, addr);
1309 macvlan_hash_del_source(entry);
1310 vlan->macaddr_count--;
1312 } else if (mode == MACVLAN_MACADDR_FLUSH) {
1313 macvlan_flush_sources(vlan->port, vlan);
1314 } else if (mode == MACVLAN_MACADDR_SET) {
1315 macvlan_flush_sources(vlan->port, vlan);
1318 ret = macvlan_hash_add_source(vlan, addr);
1323 if (!data || !data[IFLA_MACVLAN_MACADDR_DATA])
1326 head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]);
1327 len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]);
1329 nla_for_each_attr(nla, head, len, rem) {
1330 if (nla_type(nla) != IFLA_MACVLAN_MACADDR ||
1331 nla_len(nla) != ETH_ALEN)
1334 addr = nla_data(nla);
1335 ret = macvlan_hash_add_source(vlan, addr);
1346 int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
1347 struct nlattr *tb[], struct nlattr *data[],
1348 struct netlink_ext_ack *extack)
1350 struct macvlan_dev *vlan = netdev_priv(dev);
1351 struct macvlan_port *port;
1352 struct net_device *lowerdev;
1355 bool create = false;
1360 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
1361 if (lowerdev == NULL)
1364 /* When creating macvlans or macvtaps on top of other macvlans - use
1365 * the real device as the lowerdev.
1367 if (netif_is_macvlan(lowerdev))
1368 lowerdev = macvlan_dev_real_dev(lowerdev);
1371 dev->mtu = lowerdev->mtu;
1372 else if (dev->mtu > lowerdev->mtu)
1375 /* MTU range: 68 - lowerdev->max_mtu */
1376 dev->min_mtu = ETH_MIN_MTU;
1377 dev->max_mtu = lowerdev->max_mtu;
1379 if (!tb[IFLA_ADDRESS])
1380 eth_hw_addr_random(dev);
1382 if (!macvlan_port_exists(lowerdev)) {
1383 err = macvlan_port_create(lowerdev);
1388 port = macvlan_port_get_rtnl(lowerdev);
1390 /* Only 1 macvlan device can be created in passthru mode */
1391 if (macvlan_passthru(port)) {
1392 /* The macvlan port must be not created this time,
1393 * still goto destroy_macvlan_port for readability.
1396 goto destroy_macvlan_port;
1399 vlan->lowerdev = lowerdev;
1402 vlan->set_features = MACVLAN_FEATURES;
1403 vlan->nest_level = dev_get_nest_level(lowerdev) + 1;
1405 vlan->mode = MACVLAN_MODE_VEPA;
1406 if (data && data[IFLA_MACVLAN_MODE])
1407 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1409 if (data && data[IFLA_MACVLAN_FLAGS])
1410 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1412 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
1415 goto destroy_macvlan_port;
1417 macvlan_set_passthru(port);
1418 eth_hw_addr_inherit(dev, lowerdev);
1421 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1422 if (vlan->mode != MACVLAN_MODE_SOURCE) {
1424 goto destroy_macvlan_port;
1426 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1427 err = macvlan_changelink_sources(vlan, macmode, data);
1429 goto destroy_macvlan_port;
1432 err = register_netdevice(dev);
1434 goto destroy_macvlan_port;
1436 dev->priv_flags |= IFF_MACVLAN;
1437 err = netdev_upper_dev_link(lowerdev, dev, extack);
1439 goto unregister_netdev;
1441 list_add_tail_rcu(&vlan->list, &port->vlans);
1442 netif_stacked_transfer_operstate(lowerdev, dev);
1443 linkwatch_fire_event(dev);
1448 unregister_netdevice(dev);
1449 destroy_macvlan_port:
1451 macvlan_port_destroy(port->dev);
1454 EXPORT_SYMBOL_GPL(macvlan_common_newlink);
1456 static int macvlan_newlink(struct net *src_net, struct net_device *dev,
1457 struct nlattr *tb[], struct nlattr *data[],
1458 struct netlink_ext_ack *extack)
1460 return macvlan_common_newlink(src_net, dev, tb, data, extack);
1463 void macvlan_dellink(struct net_device *dev, struct list_head *head)
1465 struct macvlan_dev *vlan = netdev_priv(dev);
1467 if (vlan->mode == MACVLAN_MODE_SOURCE)
1468 macvlan_flush_sources(vlan->port, vlan);
1469 list_del_rcu(&vlan->list);
1470 unregister_netdevice_queue(dev, head);
1471 netdev_upper_dev_unlink(vlan->lowerdev, dev);
1473 EXPORT_SYMBOL_GPL(macvlan_dellink);
1475 static int macvlan_changelink(struct net_device *dev,
1476 struct nlattr *tb[], struct nlattr *data[],
1477 struct netlink_ext_ack *extack)
1479 struct macvlan_dev *vlan = netdev_priv(dev);
1480 enum macvlan_mode mode;
1481 bool set_mode = false;
1482 enum macvlan_macaddr_mode macmode;
1485 /* Validate mode, but don't set yet: setting flags may fail. */
1486 if (data && data[IFLA_MACVLAN_MODE]) {
1488 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1489 /* Passthrough mode can't be set or cleared dynamically */
1490 if ((mode == MACVLAN_MODE_PASSTHRU) !=
1491 (vlan->mode == MACVLAN_MODE_PASSTHRU))
1493 if (vlan->mode == MACVLAN_MODE_SOURCE &&
1495 macvlan_flush_sources(vlan->port, vlan);
1498 if (data && data[IFLA_MACVLAN_FLAGS]) {
1499 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1500 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
1501 if (macvlan_passthru(vlan->port) && promisc) {
1504 if (flags & MACVLAN_FLAG_NOPROMISC)
1505 err = dev_set_promiscuity(vlan->lowerdev, -1);
1507 err = dev_set_promiscuity(vlan->lowerdev, 1);
1511 vlan->flags = flags;
1515 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1516 if (vlan->mode != MACVLAN_MODE_SOURCE)
1518 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1519 ret = macvlan_changelink_sources(vlan, macmode, data);
1526 static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan)
1528 if (vlan->macaddr_count == 0)
1530 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1531 + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN);
1534 static size_t macvlan_get_size(const struct net_device *dev)
1536 struct macvlan_dev *vlan = netdev_priv(dev);
1539 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1540 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1541 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1542 + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */
1546 static int macvlan_fill_info_macaddr(struct sk_buff *skb,
1547 const struct macvlan_dev *vlan,
1550 struct hlist_head *h = &vlan->port->vlan_source_hash[i];
1551 struct macvlan_source_entry *entry;
1553 hlist_for_each_entry_rcu(entry, h, hlist) {
1554 if (entry->vlan != vlan)
1556 if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr))
1562 static int macvlan_fill_info(struct sk_buff *skb,
1563 const struct net_device *dev)
1565 struct macvlan_dev *vlan = netdev_priv(dev);
1567 struct nlattr *nest;
1569 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
1570 goto nla_put_failure;
1571 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
1572 goto nla_put_failure;
1573 if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count))
1574 goto nla_put_failure;
1575 if (vlan->macaddr_count > 0) {
1576 nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA);
1578 goto nla_put_failure;
1580 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
1581 if (macvlan_fill_info_macaddr(skb, vlan, i))
1582 goto nla_put_failure;
1584 nla_nest_end(skb, nest);
1592 static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
1593 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
1594 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
1595 [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 },
1596 [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1597 [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED },
1598 [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 },
1601 int macvlan_link_register(struct rtnl_link_ops *ops)
1604 ops->validate = macvlan_validate;
1605 ops->maxtype = IFLA_MACVLAN_MAX;
1606 ops->policy = macvlan_policy;
1607 ops->changelink = macvlan_changelink;
1608 ops->get_size = macvlan_get_size;
1609 ops->fill_info = macvlan_fill_info;
1611 return rtnl_link_register(ops);
1613 EXPORT_SYMBOL_GPL(macvlan_link_register);
1615 static struct net *macvlan_get_link_net(const struct net_device *dev)
1617 return dev_net(macvlan_dev_real_dev(dev));
1620 static struct rtnl_link_ops macvlan_link_ops = {
1622 .setup = macvlan_setup,
1623 .newlink = macvlan_newlink,
1624 .dellink = macvlan_dellink,
1625 .get_link_net = macvlan_get_link_net,
1626 .priv_size = sizeof(struct macvlan_dev),
1629 static int macvlan_device_event(struct notifier_block *unused,
1630 unsigned long event, void *ptr)
1632 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1633 struct macvlan_dev *vlan, *next;
1634 struct macvlan_port *port;
1635 LIST_HEAD(list_kill);
1637 if (!macvlan_port_exists(dev))
1640 port = macvlan_port_get_rtnl(dev);
1645 list_for_each_entry(vlan, &port->vlans, list)
1646 netif_stacked_transfer_operstate(vlan->lowerdev,
1649 case NETDEV_FEAT_CHANGE:
1650 list_for_each_entry(vlan, &port->vlans, list) {
1651 vlan->dev->gso_max_size = dev->gso_max_size;
1652 vlan->dev->gso_max_segs = dev->gso_max_segs;
1653 netdev_update_features(vlan->dev);
1656 case NETDEV_CHANGEMTU:
1657 list_for_each_entry(vlan, &port->vlans, list) {
1658 if (vlan->dev->mtu <= dev->mtu)
1660 dev_set_mtu(vlan->dev, dev->mtu);
1663 case NETDEV_CHANGEADDR:
1664 if (!macvlan_passthru(port))
1667 vlan = list_first_entry_or_null(&port->vlans,
1671 if (macvlan_sync_address(vlan->dev, dev->dev_addr))
1675 case NETDEV_UNREGISTER:
1676 /* twiddle thumbs on netns device moves */
1677 if (dev->reg_state != NETREG_UNREGISTERING)
1680 list_for_each_entry_safe(vlan, next, &port->vlans, list)
1681 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
1682 unregister_netdevice_many(&list_kill);
1684 case NETDEV_PRE_TYPE_CHANGE:
1685 /* Forbid underlaying device to change its type. */
1688 case NETDEV_NOTIFY_PEERS:
1689 case NETDEV_BONDING_FAILOVER:
1690 case NETDEV_RESEND_IGMP:
1691 /* Propagate to all vlans */
1692 list_for_each_entry(vlan, &port->vlans, list)
1693 call_netdevice_notifiers(event, vlan->dev);
1698 static struct notifier_block macvlan_notifier_block __read_mostly = {
1699 .notifier_call = macvlan_device_event,
1702 static int __init macvlan_init_module(void)
1706 register_netdevice_notifier(&macvlan_notifier_block);
1708 err = macvlan_link_register(&macvlan_link_ops);
1713 unregister_netdevice_notifier(&macvlan_notifier_block);
1717 static void __exit macvlan_cleanup_module(void)
1719 rtnl_link_unregister(&macvlan_link_ops);
1720 unregister_netdevice_notifier(&macvlan_notifier_block);
1723 module_init(macvlan_init_module);
1724 module_exit(macvlan_cleanup_module);
1726 MODULE_LICENSE("GPL");
1727 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1728 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1729 MODULE_ALIAS_RTNL_LINK("macvlan");