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
, 1);
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
);
332 schedule_work(&port
->bc_work
);
338 atomic_long_inc(&skb
->dev
->rx_dropped
);
341 static void macvlan_flush_sources(struct macvlan_port
*port
,
342 struct macvlan_dev
*vlan
)
346 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
347 struct hlist_node
*h
, *n
;
349 hlist_for_each_safe(h
, n
, &port
->vlan_source_hash
[i
]) {
350 struct macvlan_source_entry
*entry
;
352 entry
= hlist_entry(h
, struct macvlan_source_entry
,
354 if (entry
->vlan
== vlan
)
355 macvlan_hash_del_source(entry
);
358 vlan
->macaddr_count
= 0;
361 static void macvlan_forward_source_one(struct sk_buff
*skb
,
362 struct macvlan_dev
*vlan
)
364 struct sk_buff
*nskb
;
365 struct net_device
*dev
;
370 if (unlikely(!(dev
->flags
& IFF_UP
)))
373 nskb
= skb_clone(skb
, GFP_ATOMIC
);
377 len
= nskb
->len
+ ETH_HLEN
;
379 nskb
->pkt_type
= PACKET_HOST
;
381 ret
= netif_rx(nskb
);
382 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, 0);
385 static void macvlan_forward_source(struct sk_buff
*skb
,
386 struct macvlan_port
*port
,
387 const unsigned char *addr
)
389 struct macvlan_source_entry
*entry
;
390 u32 idx
= macvlan_eth_hash(addr
);
391 struct hlist_head
*h
= &port
->vlan_source_hash
[idx
];
393 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
394 if (ether_addr_equal_64bits(entry
->addr
, addr
))
395 if (entry
->vlan
->dev
->flags
& IFF_UP
)
396 macvlan_forward_source_one(skb
, entry
->vlan
);
400 /* called under rcu_read_lock() from netif_receive_skb */
401 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
403 struct macvlan_port
*port
;
404 struct sk_buff
*skb
= *pskb
;
405 const struct ethhdr
*eth
= eth_hdr(skb
);
406 const struct macvlan_dev
*vlan
;
407 const struct macvlan_dev
*src
;
408 struct net_device
*dev
;
409 unsigned int len
= 0;
410 int ret
= NET_RX_DROP
;
412 port
= macvlan_port_get_rcu(skb
->dev
);
413 if (is_multicast_ether_addr(eth
->h_dest
)) {
414 skb
= ip_check_defrag(skb
, IP_DEFRAG_MACVLAN
);
416 return RX_HANDLER_CONSUMED
;
418 macvlan_forward_source(skb
, port
, eth
->h_source
);
419 src
= macvlan_hash_lookup(port
, eth
->h_source
);
420 if (src
&& src
->mode
!= MACVLAN_MODE_VEPA
&&
421 src
->mode
!= MACVLAN_MODE_BRIDGE
) {
422 /* forward to original port. */
424 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0) ?:
429 MACVLAN_SKB_CB(skb
)->src
= src
;
430 macvlan_broadcast_enqueue(port
, skb
);
432 return RX_HANDLER_PASS
;
435 macvlan_forward_source(skb
, port
, eth
->h_source
);
437 vlan
= list_first_or_null_rcu(&port
->vlans
,
438 struct macvlan_dev
, list
);
440 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
442 return RX_HANDLER_PASS
;
445 if (unlikely(!(dev
->flags
& IFF_UP
))) {
447 return RX_HANDLER_CONSUMED
;
449 len
= skb
->len
+ ETH_HLEN
;
450 skb
= skb_share_check(skb
, GFP_ATOMIC
);
455 skb
->pkt_type
= PACKET_HOST
;
460 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, 0);
461 return RX_HANDLER_CONSUMED
;
464 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
466 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
467 const struct macvlan_port
*port
= vlan
->port
;
468 const struct macvlan_dev
*dest
;
470 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
471 const struct ethhdr
*eth
= (void *)skb
->data
;
473 /* send to other bridge ports directly */
474 if (is_multicast_ether_addr(eth
->h_dest
)) {
475 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
479 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
480 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
481 /* send to lowerdev first for its network taps */
482 dev_forward_skb(vlan
->lowerdev
, skb
);
484 return NET_XMIT_SUCCESS
;
489 skb
->dev
= vlan
->lowerdev
;
490 return dev_queue_xmit(skb
);
493 static inline netdev_tx_t
macvlan_netpoll_send_skb(struct macvlan_dev
*vlan
, struct sk_buff
*skb
)
495 #ifdef CONFIG_NET_POLL_CONTROLLER
497 netpoll_send_skb(vlan
->netpoll
, skb
);
504 static netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
505 struct net_device
*dev
)
507 unsigned int len
= skb
->len
;
509 struct macvlan_dev
*vlan
= netdev_priv(dev
);
511 if (unlikely(netpoll_tx_running(dev
)))
512 return macvlan_netpoll_send_skb(vlan
, skb
);
514 if (vlan
->fwd_priv
) {
515 skb
->dev
= vlan
->lowerdev
;
516 ret
= dev_queue_xmit_accel(skb
, vlan
->fwd_priv
);
518 ret
= macvlan_queue_xmit(skb
, dev
);
521 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
522 struct vlan_pcpu_stats
*pcpu_stats
;
524 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
525 u64_stats_update_begin(&pcpu_stats
->syncp
);
526 pcpu_stats
->tx_packets
++;
527 pcpu_stats
->tx_bytes
+= len
;
528 u64_stats_update_end(&pcpu_stats
->syncp
);
530 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
535 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
536 unsigned short type
, const void *daddr
,
537 const void *saddr
, unsigned len
)
539 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
540 struct net_device
*lowerdev
= vlan
->lowerdev
;
542 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
543 saddr
? : dev
->dev_addr
, len
);
546 static const struct header_ops macvlan_hard_header_ops
= {
547 .create
= macvlan_hard_header
,
548 .rebuild
= eth_rebuild_header
,
549 .parse
= eth_header_parse
,
550 .cache
= eth_header_cache
,
551 .cache_update
= eth_header_cache_update
,
554 static struct rtnl_link_ops macvlan_link_ops
;
556 static int macvlan_open(struct net_device
*dev
)
558 struct macvlan_dev
*vlan
= netdev_priv(dev
);
559 struct net_device
*lowerdev
= vlan
->lowerdev
;
562 if (vlan
->port
->passthru
) {
563 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
)) {
564 err
= dev_set_promiscuity(lowerdev
, 1);
571 if (lowerdev
->features
& NETIF_F_HW_L2FW_DOFFLOAD
&&
572 dev
->rtnl_link_ops
== &macvlan_link_ops
) {
574 lowerdev
->netdev_ops
->ndo_dfwd_add_station(lowerdev
, dev
);
576 /* If we get a NULL pointer back, or if we get an error
577 * then we should just fall through to the non accelerated path
579 if (IS_ERR_OR_NULL(vlan
->fwd_priv
)) {
580 vlan
->fwd_priv
= NULL
;
586 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
589 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
592 if (dev
->flags
& IFF_ALLMULTI
) {
593 err
= dev_set_allmulti(lowerdev
, 1);
599 macvlan_hash_add(vlan
);
603 dev_uc_del(lowerdev
, dev
->dev_addr
);
605 if (vlan
->fwd_priv
) {
606 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
608 vlan
->fwd_priv
= NULL
;
613 static int macvlan_stop(struct net_device
*dev
)
615 struct macvlan_dev
*vlan
= netdev_priv(dev
);
616 struct net_device
*lowerdev
= vlan
->lowerdev
;
618 if (vlan
->fwd_priv
) {
619 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
621 vlan
->fwd_priv
= NULL
;
625 dev_uc_unsync(lowerdev
, dev
);
626 dev_mc_unsync(lowerdev
, dev
);
628 if (vlan
->port
->passthru
) {
629 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
630 dev_set_promiscuity(lowerdev
, -1);
634 if (dev
->flags
& IFF_ALLMULTI
)
635 dev_set_allmulti(lowerdev
, -1);
637 dev_uc_del(lowerdev
, dev
->dev_addr
);
640 macvlan_hash_del(vlan
, !dev
->dismantle
);
644 static int macvlan_sync_address(struct net_device
*dev
, unsigned char *addr
)
646 struct macvlan_dev
*vlan
= netdev_priv(dev
);
647 struct net_device
*lowerdev
= vlan
->lowerdev
;
650 if (!(dev
->flags
& IFF_UP
)) {
651 /* Just copy in the new address */
652 ether_addr_copy(dev
->dev_addr
, addr
);
654 /* Rehash and update the device filters */
655 if (macvlan_addr_busy(vlan
->port
, addr
))
658 if (!vlan
->port
->passthru
) {
659 err
= dev_uc_add(lowerdev
, addr
);
663 dev_uc_del(lowerdev
, dev
->dev_addr
);
666 macvlan_hash_change_addr(vlan
, addr
);
671 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
673 struct macvlan_dev
*vlan
= netdev_priv(dev
);
674 struct sockaddr
*addr
= p
;
676 if (!is_valid_ether_addr(addr
->sa_data
))
677 return -EADDRNOTAVAIL
;
679 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
680 dev_set_mac_address(vlan
->lowerdev
, addr
);
684 return macvlan_sync_address(dev
, addr
->sa_data
);
687 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
689 struct macvlan_dev
*vlan
= netdev_priv(dev
);
690 struct net_device
*lowerdev
= vlan
->lowerdev
;
692 if (dev
->flags
& IFF_UP
) {
693 if (change
& IFF_ALLMULTI
)
694 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
698 static void macvlan_set_mac_lists(struct net_device
*dev
)
700 struct macvlan_dev
*vlan
= netdev_priv(dev
);
702 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
703 bitmap_fill(vlan
->mc_filter
, MACVLAN_MC_FILTER_SZ
);
705 struct netdev_hw_addr
*ha
;
706 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
708 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
709 netdev_for_each_mc_addr(ha
, dev
) {
710 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
713 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
715 bitmap_copy(vlan
->mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
717 dev_uc_sync(vlan
->lowerdev
, dev
);
718 dev_mc_sync(vlan
->lowerdev
, dev
);
721 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
723 struct macvlan_dev
*vlan
= netdev_priv(dev
);
725 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
732 * macvlan network devices have devices nesting below it and are a special
733 * "super class" of normal network devices; split their locks off into a
734 * separate class since they always nest.
736 static struct lock_class_key macvlan_netdev_xmit_lock_key
;
737 static struct lock_class_key macvlan_netdev_addr_lock_key
;
739 #define ALWAYS_ON_FEATURES \
740 (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX)
742 #define MACVLAN_FEATURES \
743 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
744 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
745 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
746 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
748 #define MACVLAN_STATE_MASK \
749 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
751 static int macvlan_get_nest_level(struct net_device
*dev
)
753 return ((struct macvlan_dev
*)netdev_priv(dev
))->nest_level
;
756 static void macvlan_set_lockdep_class_one(struct net_device
*dev
,
757 struct netdev_queue
*txq
,
760 lockdep_set_class(&txq
->_xmit_lock
,
761 &macvlan_netdev_xmit_lock_key
);
764 static void macvlan_set_lockdep_class(struct net_device
*dev
)
766 lockdep_set_class_and_subclass(&dev
->addr_list_lock
,
767 &macvlan_netdev_addr_lock_key
,
768 macvlan_get_nest_level(dev
));
769 netdev_for_each_tx_queue(dev
, macvlan_set_lockdep_class_one
, NULL
);
772 static int macvlan_init(struct net_device
*dev
)
774 struct macvlan_dev
*vlan
= netdev_priv(dev
);
775 const struct net_device
*lowerdev
= vlan
->lowerdev
;
777 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
778 (lowerdev
->state
& MACVLAN_STATE_MASK
);
779 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
780 dev
->features
|= ALWAYS_ON_FEATURES
;
781 dev
->vlan_features
= lowerdev
->vlan_features
& MACVLAN_FEATURES
;
782 dev
->gso_max_size
= lowerdev
->gso_max_size
;
783 dev
->iflink
= lowerdev
->ifindex
;
784 dev
->hard_header_len
= lowerdev
->hard_header_len
;
786 macvlan_set_lockdep_class(dev
);
788 vlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct vlan_pcpu_stats
);
789 if (!vlan
->pcpu_stats
)
795 static void macvlan_uninit(struct net_device
*dev
)
797 struct macvlan_dev
*vlan
= netdev_priv(dev
);
798 struct macvlan_port
*port
= vlan
->port
;
800 free_percpu(vlan
->pcpu_stats
);
802 macvlan_flush_sources(port
, vlan
);
805 macvlan_port_destroy(port
->dev
);
808 static struct rtnl_link_stats64
*macvlan_dev_get_stats64(struct net_device
*dev
,
809 struct rtnl_link_stats64
*stats
)
811 struct macvlan_dev
*vlan
= netdev_priv(dev
);
813 if (vlan
->pcpu_stats
) {
814 struct vlan_pcpu_stats
*p
;
815 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
816 u32 rx_errors
= 0, tx_dropped
= 0;
820 for_each_possible_cpu(i
) {
821 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
823 start
= u64_stats_fetch_begin_irq(&p
->syncp
);
824 rx_packets
= p
->rx_packets
;
825 rx_bytes
= p
->rx_bytes
;
826 rx_multicast
= p
->rx_multicast
;
827 tx_packets
= p
->tx_packets
;
828 tx_bytes
= p
->tx_bytes
;
829 } while (u64_stats_fetch_retry_irq(&p
->syncp
, start
));
831 stats
->rx_packets
+= rx_packets
;
832 stats
->rx_bytes
+= rx_bytes
;
833 stats
->multicast
+= rx_multicast
;
834 stats
->tx_packets
+= tx_packets
;
835 stats
->tx_bytes
+= tx_bytes
;
836 /* rx_errors & tx_dropped are u32, updated
837 * without syncp protection.
839 rx_errors
+= p
->rx_errors
;
840 tx_dropped
+= p
->tx_dropped
;
842 stats
->rx_errors
= rx_errors
;
843 stats
->rx_dropped
= rx_errors
;
844 stats
->tx_dropped
= tx_dropped
;
849 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
850 __be16 proto
, u16 vid
)
852 struct macvlan_dev
*vlan
= netdev_priv(dev
);
853 struct net_device
*lowerdev
= vlan
->lowerdev
;
855 return vlan_vid_add(lowerdev
, proto
, vid
);
858 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
859 __be16 proto
, u16 vid
)
861 struct macvlan_dev
*vlan
= netdev_priv(dev
);
862 struct net_device
*lowerdev
= vlan
->lowerdev
;
864 vlan_vid_del(lowerdev
, proto
, vid
);
868 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
869 struct net_device
*dev
,
870 const unsigned char *addr
,
873 struct macvlan_dev
*vlan
= netdev_priv(dev
);
876 /* Support unicast filter only on passthru devices.
877 * Multicast filter should be allowed on all devices.
879 if (!vlan
->port
->passthru
&& is_unicast_ether_addr(addr
))
882 if (flags
& NLM_F_REPLACE
)
885 if (is_unicast_ether_addr(addr
))
886 err
= dev_uc_add_excl(dev
, addr
);
887 else if (is_multicast_ether_addr(addr
))
888 err
= dev_mc_add_excl(dev
, addr
);
893 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
894 struct net_device
*dev
,
895 const unsigned char *addr
)
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 (is_unicast_ether_addr(addr
))
907 err
= dev_uc_del(dev
, addr
);
908 else if (is_multicast_ether_addr(addr
))
909 err
= dev_mc_del(dev
, addr
);
914 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
915 struct ethtool_drvinfo
*drvinfo
)
917 strlcpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
918 strlcpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
921 static int macvlan_ethtool_get_settings(struct net_device
*dev
,
922 struct ethtool_cmd
*cmd
)
924 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
926 return __ethtool_get_settings(vlan
->lowerdev
, cmd
);
929 static netdev_features_t
macvlan_fix_features(struct net_device
*dev
,
930 netdev_features_t features
)
932 struct macvlan_dev
*vlan
= netdev_priv(dev
);
933 netdev_features_t mask
;
935 features
|= NETIF_F_ALL_FOR_ALL
;
936 features
&= (vlan
->set_features
| ~MACVLAN_FEATURES
);
939 features
= netdev_increment_features(vlan
->lowerdev
->features
,
942 features
|= ALWAYS_ON_FEATURES
;
943 features
&= ~NETIF_F_NETNS_LOCAL
;
948 #ifdef CONFIG_NET_POLL_CONTROLLER
949 static void macvlan_dev_poll_controller(struct net_device
*dev
)
954 static int macvlan_dev_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*npinfo
)
956 struct macvlan_dev
*vlan
= netdev_priv(dev
);
957 struct net_device
*real_dev
= vlan
->lowerdev
;
958 struct netpoll
*netpoll
;
961 netpoll
= kzalloc(sizeof(*netpoll
), GFP_KERNEL
);
966 err
= __netpoll_setup(netpoll
, real_dev
);
972 vlan
->netpoll
= netpoll
;
978 static void macvlan_dev_netpoll_cleanup(struct net_device
*dev
)
980 struct macvlan_dev
*vlan
= netdev_priv(dev
);
981 struct netpoll
*netpoll
= vlan
->netpoll
;
986 vlan
->netpoll
= NULL
;
988 __netpoll_free_async(netpoll
);
990 #endif /* CONFIG_NET_POLL_CONTROLLER */
992 static const struct ethtool_ops macvlan_ethtool_ops
= {
993 .get_link
= ethtool_op_get_link
,
994 .get_settings
= macvlan_ethtool_get_settings
,
995 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
998 static const struct net_device_ops macvlan_netdev_ops
= {
999 .ndo_init
= macvlan_init
,
1000 .ndo_uninit
= macvlan_uninit
,
1001 .ndo_open
= macvlan_open
,
1002 .ndo_stop
= macvlan_stop
,
1003 .ndo_start_xmit
= macvlan_start_xmit
,
1004 .ndo_change_mtu
= macvlan_change_mtu
,
1005 .ndo_fix_features
= macvlan_fix_features
,
1006 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
1007 .ndo_set_mac_address
= macvlan_set_mac_address
,
1008 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
1009 .ndo_get_stats64
= macvlan_dev_get_stats64
,
1010 .ndo_validate_addr
= eth_validate_addr
,
1011 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
1012 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
1013 .ndo_fdb_add
= macvlan_fdb_add
,
1014 .ndo_fdb_del
= macvlan_fdb_del
,
1015 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
1016 .ndo_get_lock_subclass
= macvlan_get_nest_level
,
1017 #ifdef CONFIG_NET_POLL_CONTROLLER
1018 .ndo_poll_controller
= macvlan_dev_poll_controller
,
1019 .ndo_netpoll_setup
= macvlan_dev_netpoll_setup
,
1020 .ndo_netpoll_cleanup
= macvlan_dev_netpoll_cleanup
,
1024 void macvlan_common_setup(struct net_device
*dev
)
1028 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1029 netif_keep_dst(dev
);
1030 dev
->priv_flags
|= IFF_UNICAST_FLT
;
1031 dev
->netdev_ops
= &macvlan_netdev_ops
;
1032 dev
->destructor
= free_netdev
;
1033 dev
->header_ops
= &macvlan_hard_header_ops
;
1034 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
1036 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
1038 static void macvlan_setup(struct net_device
*dev
)
1040 macvlan_common_setup(dev
);
1041 dev
->tx_queue_len
= 0;
1044 static int macvlan_port_create(struct net_device
*dev
)
1046 struct macvlan_port
*port
;
1050 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
1053 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
1057 port
->passthru
= false;
1059 INIT_LIST_HEAD(&port
->vlans
);
1060 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1061 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
1062 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1063 INIT_HLIST_HEAD(&port
->vlan_source_hash
[i
]);
1065 skb_queue_head_init(&port
->bc_queue
);
1066 INIT_WORK(&port
->bc_work
, macvlan_process_broadcast
);
1068 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
1072 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
1076 static void macvlan_port_destroy(struct net_device
*dev
)
1078 struct macvlan_port
*port
= macvlan_port_get_rtnl(dev
);
1080 cancel_work_sync(&port
->bc_work
);
1081 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
1082 netdev_rx_handler_unregister(dev
);
1083 kfree_rcu(port
, rcu
);
1086 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
1088 if (tb
[IFLA_ADDRESS
]) {
1089 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
1091 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
1092 return -EADDRNOTAVAIL
;
1095 if (data
&& data
[IFLA_MACVLAN_FLAGS
] &&
1096 nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]) & ~MACVLAN_FLAG_NOPROMISC
)
1099 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1100 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
1101 case MACVLAN_MODE_PRIVATE
:
1102 case MACVLAN_MODE_VEPA
:
1103 case MACVLAN_MODE_BRIDGE
:
1104 case MACVLAN_MODE_PASSTHRU
:
1105 case MACVLAN_MODE_SOURCE
:
1112 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1113 switch (nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
])) {
1114 case MACVLAN_MACADDR_ADD
:
1115 case MACVLAN_MACADDR_DEL
:
1116 case MACVLAN_MACADDR_FLUSH
:
1117 case MACVLAN_MACADDR_SET
:
1124 if (data
&& data
[IFLA_MACVLAN_MACADDR
]) {
1125 if (nla_len(data
[IFLA_MACVLAN_MACADDR
]) != ETH_ALEN
)
1128 if (!is_valid_ether_addr(nla_data(data
[IFLA_MACVLAN_MACADDR
])))
1129 return -EADDRNOTAVAIL
;
1132 if (data
&& data
[IFLA_MACVLAN_MACADDR_COUNT
])
1139 * reconfigure list of remote source mac address
1140 * (only for macvlan devices in source mode)
1141 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1142 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1144 static int macvlan_changelink_sources(struct macvlan_dev
*vlan
, u32 mode
,
1145 struct nlattr
*data
[])
1149 struct nlattr
*nla
, *head
;
1150 struct macvlan_source_entry
*entry
;
1152 if (data
[IFLA_MACVLAN_MACADDR
])
1153 addr
= nla_data(data
[IFLA_MACVLAN_MACADDR
]);
1155 if (mode
== MACVLAN_MACADDR_ADD
) {
1159 return macvlan_hash_add_source(vlan
, addr
);
1161 } else if (mode
== MACVLAN_MACADDR_DEL
) {
1165 entry
= macvlan_hash_lookup_source(vlan
, addr
);
1167 macvlan_hash_del_source(entry
);
1168 vlan
->macaddr_count
--;
1170 } else if (mode
== MACVLAN_MACADDR_FLUSH
) {
1171 macvlan_flush_sources(vlan
->port
, vlan
);
1172 } else if (mode
== MACVLAN_MACADDR_SET
) {
1173 macvlan_flush_sources(vlan
->port
, vlan
);
1176 ret
= macvlan_hash_add_source(vlan
, addr
);
1181 if (!data
|| !data
[IFLA_MACVLAN_MACADDR_DATA
])
1184 head
= nla_data(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1185 len
= nla_len(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1187 nla_for_each_attr(nla
, head
, len
, rem
) {
1188 if (nla_type(nla
) != IFLA_MACVLAN_MACADDR
||
1189 nla_len(nla
) != ETH_ALEN
)
1192 addr
= nla_data(nla
);
1193 ret
= macvlan_hash_add_source(vlan
, addr
);
1204 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
1205 struct nlattr
*tb
[], struct nlattr
*data
[])
1207 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1208 struct macvlan_port
*port
;
1209 struct net_device
*lowerdev
;
1216 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
1217 if (lowerdev
== NULL
)
1220 /* When creating macvlans or macvtaps on top of other macvlans - use
1221 * the real device as the lowerdev.
1223 if (netif_is_macvlan(lowerdev
))
1224 lowerdev
= macvlan_dev_real_dev(lowerdev
);
1227 dev
->mtu
= lowerdev
->mtu
;
1228 else if (dev
->mtu
> lowerdev
->mtu
)
1231 if (!tb
[IFLA_ADDRESS
])
1232 eth_hw_addr_random(dev
);
1234 if (!macvlan_port_exists(lowerdev
)) {
1235 err
= macvlan_port_create(lowerdev
);
1239 port
= macvlan_port_get_rtnl(lowerdev
);
1241 /* Only 1 macvlan device can be created in passthru mode */
1245 vlan
->lowerdev
= lowerdev
;
1248 vlan
->set_features
= MACVLAN_FEATURES
;
1249 vlan
->nest_level
= dev_get_nest_level(lowerdev
, netif_is_macvlan
) + 1;
1251 vlan
->mode
= MACVLAN_MODE_VEPA
;
1252 if (data
&& data
[IFLA_MACVLAN_MODE
])
1253 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1255 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
1256 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1258 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
1261 port
->passthru
= true;
1262 eth_hw_addr_inherit(dev
, lowerdev
);
1265 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1266 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
)
1268 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1269 err
= macvlan_changelink_sources(vlan
, macmode
, data
);
1275 err
= register_netdevice(dev
);
1279 dev
->priv_flags
|= IFF_MACVLAN
;
1280 err
= netdev_upper_dev_link(lowerdev
, dev
);
1282 goto unregister_netdev
;
1284 list_add_tail_rcu(&vlan
->list
, &port
->vlans
);
1285 netif_stacked_transfer_operstate(lowerdev
, dev
);
1290 unregister_netdevice(dev
);
1294 macvlan_port_destroy(lowerdev
);
1298 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
1300 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
1301 struct nlattr
*tb
[], struct nlattr
*data
[])
1303 return macvlan_common_newlink(src_net
, dev
, tb
, data
);
1306 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
1308 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1310 if (vlan
->mode
== MACVLAN_MODE_SOURCE
)
1311 macvlan_flush_sources(vlan
->port
, vlan
);
1312 list_del_rcu(&vlan
->list
);
1313 unregister_netdevice_queue(dev
, head
);
1314 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
1316 EXPORT_SYMBOL_GPL(macvlan_dellink
);
1318 static int macvlan_changelink(struct net_device
*dev
,
1319 struct nlattr
*tb
[], struct nlattr
*data
[])
1321 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1322 enum macvlan_mode mode
;
1323 bool set_mode
= false;
1324 enum macvlan_macaddr_mode macmode
;
1327 /* Validate mode, but don't set yet: setting flags may fail. */
1328 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1330 mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1331 /* Passthrough mode can't be set or cleared dynamically */
1332 if ((mode
== MACVLAN_MODE_PASSTHRU
) !=
1333 (vlan
->mode
== MACVLAN_MODE_PASSTHRU
))
1335 if (vlan
->mode
== MACVLAN_MODE_SOURCE
&&
1337 macvlan_flush_sources(vlan
->port
, vlan
);
1340 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
1341 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1342 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
1343 if (vlan
->port
->passthru
&& promisc
) {
1346 if (flags
& MACVLAN_FLAG_NOPROMISC
)
1347 err
= dev_set_promiscuity(vlan
->lowerdev
, -1);
1349 err
= dev_set_promiscuity(vlan
->lowerdev
, 1);
1353 vlan
->flags
= flags
;
1357 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1358 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
)
1360 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1361 ret
= macvlan_changelink_sources(vlan
, macmode
, data
);
1368 static size_t macvlan_get_size_mac(const struct macvlan_dev
*vlan
)
1370 if (vlan
->macaddr_count
== 0)
1372 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1373 + vlan
->macaddr_count
* nla_total_size(sizeof(u8
) * ETH_ALEN
);
1376 static size_t macvlan_get_size(const struct net_device
*dev
)
1378 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1381 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1382 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1383 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1384 + macvlan_get_size_mac(vlan
) /* IFLA_MACVLAN_MACADDR */
1388 static int macvlan_fill_info_macaddr(struct sk_buff
*skb
,
1389 const struct macvlan_dev
*vlan
,
1392 struct hlist_head
*h
= &vlan
->port
->vlan_source_hash
[i
];
1393 struct macvlan_source_entry
*entry
;
1395 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
1396 if (entry
->vlan
!= vlan
)
1398 if (nla_put(skb
, IFLA_MACVLAN_MACADDR
, ETH_ALEN
, entry
->addr
))
1404 static int macvlan_fill_info(struct sk_buff
*skb
,
1405 const struct net_device
*dev
)
1407 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1409 struct nlattr
*nest
;
1411 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
1412 goto nla_put_failure
;
1413 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
1414 goto nla_put_failure
;
1415 if (nla_put_u32(skb
, IFLA_MACVLAN_MACADDR_COUNT
, vlan
->macaddr_count
))
1416 goto nla_put_failure
;
1417 if (vlan
->macaddr_count
> 0) {
1418 nest
= nla_nest_start(skb
, IFLA_MACVLAN_MACADDR_DATA
);
1420 goto nla_put_failure
;
1422 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
1423 if (macvlan_fill_info_macaddr(skb
, vlan
, i
))
1424 goto nla_put_failure
;
1426 nla_nest_end(skb
, nest
);
1434 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
1435 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
1436 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
1437 [IFLA_MACVLAN_MACADDR_MODE
] = { .type
= NLA_U32
},
1438 [IFLA_MACVLAN_MACADDR
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1439 [IFLA_MACVLAN_MACADDR_DATA
] = { .type
= NLA_NESTED
},
1440 [IFLA_MACVLAN_MACADDR_COUNT
] = { .type
= NLA_U32
},
1443 int macvlan_link_register(struct rtnl_link_ops
*ops
)
1446 ops
->priv_size
= sizeof(struct macvlan_dev
);
1447 ops
->validate
= macvlan_validate
;
1448 ops
->maxtype
= IFLA_MACVLAN_MAX
;
1449 ops
->policy
= macvlan_policy
;
1450 ops
->changelink
= macvlan_changelink
;
1451 ops
->get_size
= macvlan_get_size
;
1452 ops
->fill_info
= macvlan_fill_info
;
1454 return rtnl_link_register(ops
);
1456 EXPORT_SYMBOL_GPL(macvlan_link_register
);
1458 static struct rtnl_link_ops macvlan_link_ops
= {
1460 .setup
= macvlan_setup
,
1461 .newlink
= macvlan_newlink
,
1462 .dellink
= macvlan_dellink
,
1465 static int macvlan_device_event(struct notifier_block
*unused
,
1466 unsigned long event
, void *ptr
)
1468 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1469 struct macvlan_dev
*vlan
, *next
;
1470 struct macvlan_port
*port
;
1471 LIST_HEAD(list_kill
);
1473 if (!macvlan_port_exists(dev
))
1476 port
= macvlan_port_get_rtnl(dev
);
1480 list_for_each_entry(vlan
, &port
->vlans
, list
)
1481 netif_stacked_transfer_operstate(vlan
->lowerdev
,
1484 case NETDEV_FEAT_CHANGE
:
1485 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1486 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
1487 netdev_update_features(vlan
->dev
);
1490 case NETDEV_CHANGEMTU
:
1491 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1492 if (vlan
->dev
->mtu
<= dev
->mtu
)
1494 dev_set_mtu(vlan
->dev
, dev
->mtu
);
1497 case NETDEV_CHANGEADDR
:
1498 if (!port
->passthru
)
1501 vlan
= list_first_entry_or_null(&port
->vlans
,
1505 if (macvlan_sync_address(vlan
->dev
, dev
->dev_addr
))
1509 case NETDEV_UNREGISTER
:
1510 /* twiddle thumbs on netns device moves */
1511 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
1514 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
1515 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
1516 unregister_netdevice_many(&list_kill
);
1518 case NETDEV_PRE_TYPE_CHANGE
:
1519 /* Forbid underlaying device to change its type. */
1522 case NETDEV_NOTIFY_PEERS
:
1523 case NETDEV_BONDING_FAILOVER
:
1524 case NETDEV_RESEND_IGMP
:
1525 /* Propagate to all vlans */
1526 list_for_each_entry(vlan
, &port
->vlans
, list
)
1527 call_netdevice_notifiers(event
, vlan
->dev
);
1532 static struct notifier_block macvlan_notifier_block __read_mostly
= {
1533 .notifier_call
= macvlan_device_event
,
1536 static int __init
macvlan_init_module(void)
1540 register_netdevice_notifier(&macvlan_notifier_block
);
1542 err
= macvlan_link_register(&macvlan_link_ops
);
1547 unregister_netdevice_notifier(&macvlan_notifier_block
);
1551 static void __exit
macvlan_cleanup_module(void)
1553 rtnl_link_unregister(&macvlan_link_ops
);
1554 unregister_netdevice_notifier(&macvlan_notifier_block
);
1557 module_init(macvlan_init_module
);
1558 module_exit(macvlan_cleanup_module
);
1560 MODULE_LICENSE("GPL");
1561 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1562 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1563 MODULE_ALIAS_RTNL_LINK("macvlan");