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
;
46 struct sk_buff_head bc_queue
;
47 struct work_struct bc_work
;
50 struct hlist_head vlan_source_hash
[MACVLAN_HASH_SIZE
];
51 DECLARE_BITMAP(mc_filter
, MACVLAN_MC_FILTER_SZ
);
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 bool macvlan_addr_busy(const struct macvlan_port
*port
,
182 const unsigned char *addr
)
184 /* Test to see if the specified multicast address is
185 * currently in use by the underlying device or
188 if (ether_addr_equal_64bits(port
->dev
->dev_addr
, addr
))
191 if (macvlan_hash_lookup(port
, addr
))
198 static int macvlan_broadcast_one(struct sk_buff
*skb
,
199 const struct macvlan_dev
*vlan
,
200 const struct ethhdr
*eth
, bool local
)
202 struct net_device
*dev
= vlan
->dev
;
205 return __dev_forward_skb(dev
, skb
);
208 if (ether_addr_equal_64bits(eth
->h_dest
, dev
->broadcast
))
209 skb
->pkt_type
= PACKET_BROADCAST
;
211 skb
->pkt_type
= PACKET_MULTICAST
;
216 static u32
macvlan_hash_mix(const struct macvlan_dev
*vlan
)
218 return (u32
)(((unsigned long)vlan
) >> L1_CACHE_SHIFT
);
222 static unsigned int mc_hash(const struct macvlan_dev
*vlan
,
223 const unsigned char *addr
)
225 u32 val
= __get_unaligned_cpu32(addr
+ 2);
227 val
^= macvlan_hash_mix(vlan
);
228 return hash_32(val
, MACVLAN_MC_FILTER_BITS
);
231 static void macvlan_broadcast(struct sk_buff
*skb
,
232 const struct macvlan_port
*port
,
233 struct net_device
*src
,
234 enum macvlan_mode mode
)
236 const struct ethhdr
*eth
= eth_hdr(skb
);
237 const struct macvlan_dev
*vlan
;
238 struct sk_buff
*nskb
;
243 if (skb
->protocol
== htons(ETH_P_PAUSE
))
246 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
247 hlist_for_each_entry_rcu(vlan
, &port
->vlan_hash
[i
], hlist
) {
248 if (vlan
->dev
== src
|| !(vlan
->mode
& mode
))
251 hash
= mc_hash(vlan
, eth
->h_dest
);
252 if (!test_bit(hash
, vlan
->mc_filter
))
256 nskb
= skb_clone(skb
, GFP_ATOMIC
);
258 err
= macvlan_broadcast_one(
260 mode
== MACVLAN_MODE_BRIDGE
) ?:
262 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
263 err
== NET_RX_SUCCESS
, true);
268 static void macvlan_process_broadcast(struct work_struct
*w
)
270 struct macvlan_port
*port
= container_of(w
, struct macvlan_port
,
273 struct sk_buff_head list
;
275 __skb_queue_head_init(&list
);
277 spin_lock_bh(&port
->bc_queue
.lock
);
278 skb_queue_splice_tail_init(&port
->bc_queue
, &list
);
279 spin_unlock_bh(&port
->bc_queue
.lock
);
281 while ((skb
= __skb_dequeue(&list
))) {
282 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
287 /* frame comes from an external address */
288 macvlan_broadcast(skb
, port
, NULL
,
289 MACVLAN_MODE_PRIVATE
|
291 MACVLAN_MODE_PASSTHRU
|
292 MACVLAN_MODE_BRIDGE
);
293 else if (src
->mode
== MACVLAN_MODE_VEPA
)
294 /* flood to everyone except source */
295 macvlan_broadcast(skb
, port
, src
->dev
,
297 MACVLAN_MODE_BRIDGE
);
300 * flood only to VEPA ports, bridge ports
301 * already saw the frame on the way out.
303 macvlan_broadcast(skb
, port
, src
->dev
,
314 static void macvlan_broadcast_enqueue(struct macvlan_port
*port
,
315 const struct macvlan_dev
*src
,
318 struct sk_buff
*nskb
;
321 nskb
= skb_clone(skb
, GFP_ATOMIC
);
325 MACVLAN_SKB_CB(nskb
)->src
= src
;
327 spin_lock(&port
->bc_queue
.lock
);
328 if (skb_queue_len(&port
->bc_queue
) < MACVLAN_BC_QUEUE_LEN
) {
331 __skb_queue_tail(&port
->bc_queue
, nskb
);
334 spin_unlock(&port
->bc_queue
.lock
);
339 schedule_work(&port
->bc_work
);
345 atomic_long_inc(&skb
->dev
->rx_dropped
);
348 static void macvlan_flush_sources(struct macvlan_port
*port
,
349 struct macvlan_dev
*vlan
)
353 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
354 struct hlist_node
*h
, *n
;
356 hlist_for_each_safe(h
, n
, &port
->vlan_source_hash
[i
]) {
357 struct macvlan_source_entry
*entry
;
359 entry
= hlist_entry(h
, struct macvlan_source_entry
,
361 if (entry
->vlan
== vlan
)
362 macvlan_hash_del_source(entry
);
365 vlan
->macaddr_count
= 0;
368 static void macvlan_forward_source_one(struct sk_buff
*skb
,
369 struct macvlan_dev
*vlan
)
371 struct sk_buff
*nskb
;
372 struct net_device
*dev
;
377 if (unlikely(!(dev
->flags
& IFF_UP
)))
380 nskb
= skb_clone(skb
, GFP_ATOMIC
);
384 len
= nskb
->len
+ ETH_HLEN
;
386 nskb
->pkt_type
= PACKET_HOST
;
388 ret
= netif_rx(nskb
);
389 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, false);
392 static void macvlan_forward_source(struct sk_buff
*skb
,
393 struct macvlan_port
*port
,
394 const unsigned char *addr
)
396 struct macvlan_source_entry
*entry
;
397 u32 idx
= macvlan_eth_hash(addr
);
398 struct hlist_head
*h
= &port
->vlan_source_hash
[idx
];
400 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
401 if (ether_addr_equal_64bits(entry
->addr
, addr
))
402 macvlan_forward_source_one(skb
, entry
->vlan
);
406 /* called under rcu_read_lock() from netif_receive_skb */
407 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
409 struct macvlan_port
*port
;
410 struct sk_buff
*skb
= *pskb
;
411 const struct ethhdr
*eth
= eth_hdr(skb
);
412 const struct macvlan_dev
*vlan
;
413 const struct macvlan_dev
*src
;
414 struct net_device
*dev
;
415 unsigned int len
= 0;
417 rx_handler_result_t handle_res
;
419 port
= macvlan_port_get_rcu(skb
->dev
);
420 if (is_multicast_ether_addr(eth
->h_dest
)) {
423 skb
= ip_check_defrag(dev_net(skb
->dev
), skb
, IP_DEFRAG_MACVLAN
);
425 return RX_HANDLER_CONSUMED
;
428 macvlan_forward_source(skb
, port
, eth
->h_source
);
429 src
= macvlan_hash_lookup(port
, eth
->h_source
);
430 if (src
&& src
->mode
!= MACVLAN_MODE_VEPA
&&
431 src
->mode
!= MACVLAN_MODE_BRIDGE
) {
432 /* forward to original port. */
434 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0) ?:
436 handle_res
= RX_HANDLER_CONSUMED
;
440 hash
= mc_hash(NULL
, eth
->h_dest
);
441 if (test_bit(hash
, port
->mc_filter
))
442 macvlan_broadcast_enqueue(port
, src
, skb
);
444 return RX_HANDLER_PASS
;
447 macvlan_forward_source(skb
, port
, eth
->h_source
);
449 vlan
= list_first_or_null_rcu(&port
->vlans
,
450 struct macvlan_dev
, list
);
452 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
454 return RX_HANDLER_PASS
;
457 if (unlikely(!(dev
->flags
& IFF_UP
))) {
459 return RX_HANDLER_CONSUMED
;
461 len
= skb
->len
+ ETH_HLEN
;
462 skb
= skb_share_check(skb
, GFP_ATOMIC
);
465 handle_res
= RX_HANDLER_CONSUMED
;
471 skb
->pkt_type
= PACKET_HOST
;
473 ret
= NET_RX_SUCCESS
;
474 handle_res
= RX_HANDLER_ANOTHER
;
476 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, false);
480 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
482 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
483 const struct macvlan_port
*port
= vlan
->port
;
484 const struct macvlan_dev
*dest
;
486 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
487 const struct ethhdr
*eth
= (void *)skb
->data
;
489 /* send to other bridge ports directly */
490 if (is_multicast_ether_addr(eth
->h_dest
)) {
491 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
495 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
496 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
497 /* send to lowerdev first for its network taps */
498 dev_forward_skb(vlan
->lowerdev
, skb
);
500 return NET_XMIT_SUCCESS
;
505 skb
->dev
= vlan
->lowerdev
;
506 return dev_queue_xmit(skb
);
509 static inline netdev_tx_t
macvlan_netpoll_send_skb(struct macvlan_dev
*vlan
, struct sk_buff
*skb
)
511 #ifdef CONFIG_NET_POLL_CONTROLLER
513 netpoll_send_skb(vlan
->netpoll
, skb
);
520 static netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
521 struct net_device
*dev
)
523 unsigned int len
= skb
->len
;
525 struct macvlan_dev
*vlan
= netdev_priv(dev
);
527 if (unlikely(netpoll_tx_running(dev
)))
528 return macvlan_netpoll_send_skb(vlan
, skb
);
530 if (vlan
->fwd_priv
) {
531 skb
->dev
= vlan
->lowerdev
;
532 ret
= dev_queue_xmit_accel(skb
, vlan
->fwd_priv
);
534 ret
= macvlan_queue_xmit(skb
, dev
);
537 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
538 struct vlan_pcpu_stats
*pcpu_stats
;
540 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
541 u64_stats_update_begin(&pcpu_stats
->syncp
);
542 pcpu_stats
->tx_packets
++;
543 pcpu_stats
->tx_bytes
+= len
;
544 u64_stats_update_end(&pcpu_stats
->syncp
);
546 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
551 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
552 unsigned short type
, const void *daddr
,
553 const void *saddr
, unsigned len
)
555 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
556 struct net_device
*lowerdev
= vlan
->lowerdev
;
558 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
559 saddr
? : dev
->dev_addr
, len
);
562 static const struct header_ops macvlan_hard_header_ops
= {
563 .create
= macvlan_hard_header
,
564 .parse
= eth_header_parse
,
565 .cache
= eth_header_cache
,
566 .cache_update
= eth_header_cache_update
,
569 static struct rtnl_link_ops macvlan_link_ops
;
571 static int macvlan_open(struct net_device
*dev
)
573 struct macvlan_dev
*vlan
= netdev_priv(dev
);
574 struct net_device
*lowerdev
= vlan
->lowerdev
;
577 if (vlan
->port
->passthru
) {
578 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
)) {
579 err
= dev_set_promiscuity(lowerdev
, 1);
586 if (lowerdev
->features
& NETIF_F_HW_L2FW_DOFFLOAD
&&
587 dev
->rtnl_link_ops
== &macvlan_link_ops
) {
589 lowerdev
->netdev_ops
->ndo_dfwd_add_station(lowerdev
, dev
);
591 /* If we get a NULL pointer back, or if we get an error
592 * then we should just fall through to the non accelerated path
594 if (IS_ERR_OR_NULL(vlan
->fwd_priv
)) {
595 vlan
->fwd_priv
= NULL
;
601 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
604 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
607 if (dev
->flags
& IFF_ALLMULTI
) {
608 err
= dev_set_allmulti(lowerdev
, 1);
613 if (dev
->flags
& IFF_PROMISC
) {
614 err
= dev_set_promiscuity(lowerdev
, 1);
620 macvlan_hash_add(vlan
);
624 if (dev
->flags
& IFF_ALLMULTI
)
625 dev_set_allmulti(lowerdev
, -1);
627 dev_uc_del(lowerdev
, dev
->dev_addr
);
629 if (vlan
->fwd_priv
) {
630 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
632 vlan
->fwd_priv
= NULL
;
637 static int macvlan_stop(struct net_device
*dev
)
639 struct macvlan_dev
*vlan
= netdev_priv(dev
);
640 struct net_device
*lowerdev
= vlan
->lowerdev
;
642 if (vlan
->fwd_priv
) {
643 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
645 vlan
->fwd_priv
= NULL
;
649 dev_uc_unsync(lowerdev
, dev
);
650 dev_mc_unsync(lowerdev
, dev
);
652 if (vlan
->port
->passthru
) {
653 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
654 dev_set_promiscuity(lowerdev
, -1);
658 if (dev
->flags
& IFF_ALLMULTI
)
659 dev_set_allmulti(lowerdev
, -1);
661 if (dev
->flags
& IFF_PROMISC
)
662 dev_set_promiscuity(lowerdev
, -1);
664 dev_uc_del(lowerdev
, dev
->dev_addr
);
667 macvlan_hash_del(vlan
, !dev
->dismantle
);
671 static int macvlan_sync_address(struct net_device
*dev
, unsigned char *addr
)
673 struct macvlan_dev
*vlan
= netdev_priv(dev
);
674 struct net_device
*lowerdev
= vlan
->lowerdev
;
677 if (!(dev
->flags
& IFF_UP
)) {
678 /* Just copy in the new address */
679 ether_addr_copy(dev
->dev_addr
, addr
);
681 /* Rehash and update the device filters */
682 if (macvlan_addr_busy(vlan
->port
, addr
))
685 if (!vlan
->port
->passthru
) {
686 err
= dev_uc_add(lowerdev
, addr
);
690 dev_uc_del(lowerdev
, dev
->dev_addr
);
693 macvlan_hash_change_addr(vlan
, addr
);
698 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
700 struct macvlan_dev
*vlan
= netdev_priv(dev
);
701 struct sockaddr
*addr
= p
;
703 if (!is_valid_ether_addr(addr
->sa_data
))
704 return -EADDRNOTAVAIL
;
706 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
707 dev_set_mac_address(vlan
->lowerdev
, addr
);
711 return macvlan_sync_address(dev
, addr
->sa_data
);
714 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
716 struct macvlan_dev
*vlan
= netdev_priv(dev
);
717 struct net_device
*lowerdev
= vlan
->lowerdev
;
719 if (dev
->flags
& IFF_UP
) {
720 if (change
& IFF_ALLMULTI
)
721 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
722 if (change
& IFF_PROMISC
)
723 dev_set_promiscuity(lowerdev
,
724 dev
->flags
& IFF_PROMISC
? 1 : -1);
729 static void macvlan_compute_filter(unsigned long *mc_filter
,
730 struct net_device
*dev
,
731 struct macvlan_dev
*vlan
)
733 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
734 bitmap_fill(mc_filter
, MACVLAN_MC_FILTER_SZ
);
736 struct netdev_hw_addr
*ha
;
737 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
739 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
740 netdev_for_each_mc_addr(ha
, dev
) {
741 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
744 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
746 bitmap_copy(mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
750 static void macvlan_set_mac_lists(struct net_device
*dev
)
752 struct macvlan_dev
*vlan
= netdev_priv(dev
);
754 macvlan_compute_filter(vlan
->mc_filter
, dev
, vlan
);
756 dev_uc_sync(vlan
->lowerdev
, dev
);
757 dev_mc_sync(vlan
->lowerdev
, dev
);
759 /* This is slightly inaccurate as we're including the subscription
760 * list of vlan->lowerdev too.
762 * Bug alert: This only works if everyone has the same broadcast
763 * address as lowerdev. As soon as someone changes theirs this
766 * However, this is already broken as when you change your broadcast
767 * address we don't get called.
769 * The solution is to maintain a list of broadcast addresses like
770 * we do for uc/mc, if you care.
772 macvlan_compute_filter(vlan
->port
->mc_filter
, vlan
->lowerdev
, NULL
);
775 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
777 struct macvlan_dev
*vlan
= netdev_priv(dev
);
779 if (vlan
->lowerdev
->mtu
< new_mtu
)
786 * macvlan network devices have devices nesting below it and are a special
787 * "super class" of normal network devices; split their locks off into a
788 * separate class since they always nest.
790 static struct lock_class_key macvlan_netdev_addr_lock_key
;
792 #define ALWAYS_ON_FEATURES \
793 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \
796 #define MACVLAN_FEATURES \
797 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
798 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \
799 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
800 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
802 #define MACVLAN_STATE_MASK \
803 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
805 static int macvlan_get_nest_level(struct net_device
*dev
)
807 return ((struct macvlan_dev
*)netdev_priv(dev
))->nest_level
;
810 static void macvlan_set_lockdep_class(struct net_device
*dev
)
812 netdev_lockdep_set_classes(dev
);
813 lockdep_set_class_and_subclass(&dev
->addr_list_lock
,
814 &macvlan_netdev_addr_lock_key
,
815 macvlan_get_nest_level(dev
));
818 static int macvlan_init(struct net_device
*dev
)
820 struct macvlan_dev
*vlan
= netdev_priv(dev
);
821 const struct net_device
*lowerdev
= vlan
->lowerdev
;
822 struct macvlan_port
*port
= vlan
->port
;
824 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
825 (lowerdev
->state
& MACVLAN_STATE_MASK
);
826 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
827 dev
->features
|= ALWAYS_ON_FEATURES
;
828 dev
->hw_features
|= NETIF_F_LRO
;
829 dev
->vlan_features
= lowerdev
->vlan_features
& MACVLAN_FEATURES
;
830 dev
->gso_max_size
= lowerdev
->gso_max_size
;
831 dev
->gso_max_segs
= lowerdev
->gso_max_segs
;
832 dev
->hard_header_len
= lowerdev
->hard_header_len
;
834 macvlan_set_lockdep_class(dev
);
836 vlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct vlan_pcpu_stats
);
837 if (!vlan
->pcpu_stats
)
845 static void macvlan_uninit(struct net_device
*dev
)
847 struct macvlan_dev
*vlan
= netdev_priv(dev
);
848 struct macvlan_port
*port
= vlan
->port
;
850 free_percpu(vlan
->pcpu_stats
);
852 macvlan_flush_sources(port
, vlan
);
855 macvlan_port_destroy(port
->dev
);
858 static void macvlan_dev_get_stats64(struct net_device
*dev
,
859 struct rtnl_link_stats64
*stats
)
861 struct macvlan_dev
*vlan
= netdev_priv(dev
);
863 if (vlan
->pcpu_stats
) {
864 struct vlan_pcpu_stats
*p
;
865 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
866 u32 rx_errors
= 0, tx_dropped
= 0;
870 for_each_possible_cpu(i
) {
871 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
873 start
= u64_stats_fetch_begin_irq(&p
->syncp
);
874 rx_packets
= p
->rx_packets
;
875 rx_bytes
= p
->rx_bytes
;
876 rx_multicast
= p
->rx_multicast
;
877 tx_packets
= p
->tx_packets
;
878 tx_bytes
= p
->tx_bytes
;
879 } while (u64_stats_fetch_retry_irq(&p
->syncp
, start
));
881 stats
->rx_packets
+= rx_packets
;
882 stats
->rx_bytes
+= rx_bytes
;
883 stats
->multicast
+= rx_multicast
;
884 stats
->tx_packets
+= tx_packets
;
885 stats
->tx_bytes
+= tx_bytes
;
886 /* rx_errors & tx_dropped are u32, updated
887 * without syncp protection.
889 rx_errors
+= p
->rx_errors
;
890 tx_dropped
+= p
->tx_dropped
;
892 stats
->rx_errors
= rx_errors
;
893 stats
->rx_dropped
= rx_errors
;
894 stats
->tx_dropped
= tx_dropped
;
898 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
899 __be16 proto
, u16 vid
)
901 struct macvlan_dev
*vlan
= netdev_priv(dev
);
902 struct net_device
*lowerdev
= vlan
->lowerdev
;
904 return vlan_vid_add(lowerdev
, proto
, vid
);
907 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
908 __be16 proto
, u16 vid
)
910 struct macvlan_dev
*vlan
= netdev_priv(dev
);
911 struct net_device
*lowerdev
= vlan
->lowerdev
;
913 vlan_vid_del(lowerdev
, proto
, vid
);
917 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
918 struct net_device
*dev
,
919 const unsigned char *addr
, u16 vid
,
922 struct macvlan_dev
*vlan
= netdev_priv(dev
);
925 /* Support unicast filter only on passthru devices.
926 * Multicast filter should be allowed on all devices.
928 if (!vlan
->port
->passthru
&& is_unicast_ether_addr(addr
))
931 if (flags
& NLM_F_REPLACE
)
934 if (is_unicast_ether_addr(addr
))
935 err
= dev_uc_add_excl(dev
, addr
);
936 else if (is_multicast_ether_addr(addr
))
937 err
= dev_mc_add_excl(dev
, addr
);
942 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
943 struct net_device
*dev
,
944 const unsigned char *addr
, u16 vid
)
946 struct macvlan_dev
*vlan
= netdev_priv(dev
);
949 /* Support unicast filter only on passthru devices.
950 * Multicast filter should be allowed on all devices.
952 if (!vlan
->port
->passthru
&& is_unicast_ether_addr(addr
))
955 if (is_unicast_ether_addr(addr
))
956 err
= dev_uc_del(dev
, addr
);
957 else if (is_multicast_ether_addr(addr
))
958 err
= dev_mc_del(dev
, addr
);
963 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
964 struct ethtool_drvinfo
*drvinfo
)
966 strlcpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
967 strlcpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
970 static int macvlan_ethtool_get_link_ksettings(struct net_device
*dev
,
971 struct ethtool_link_ksettings
*cmd
)
973 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
975 return __ethtool_get_link_ksettings(vlan
->lowerdev
, cmd
);
978 static netdev_features_t
macvlan_fix_features(struct net_device
*dev
,
979 netdev_features_t features
)
981 struct macvlan_dev
*vlan
= netdev_priv(dev
);
982 netdev_features_t lowerdev_features
= vlan
->lowerdev
->features
;
983 netdev_features_t mask
;
985 features
|= NETIF_F_ALL_FOR_ALL
;
986 features
&= (vlan
->set_features
| ~MACVLAN_FEATURES
);
989 lowerdev_features
&= (features
| ~NETIF_F_LRO
);
990 features
= netdev_increment_features(lowerdev_features
, features
, mask
);
991 features
|= ALWAYS_ON_FEATURES
;
992 features
&= ~NETIF_F_NETNS_LOCAL
;
997 #ifdef CONFIG_NET_POLL_CONTROLLER
998 static void macvlan_dev_poll_controller(struct net_device
*dev
)
1003 static int macvlan_dev_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*npinfo
)
1005 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1006 struct net_device
*real_dev
= vlan
->lowerdev
;
1007 struct netpoll
*netpoll
;
1010 netpoll
= kzalloc(sizeof(*netpoll
), GFP_KERNEL
);
1015 err
= __netpoll_setup(netpoll
, real_dev
);
1021 vlan
->netpoll
= netpoll
;
1027 static void macvlan_dev_netpoll_cleanup(struct net_device
*dev
)
1029 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1030 struct netpoll
*netpoll
= vlan
->netpoll
;
1035 vlan
->netpoll
= NULL
;
1037 __netpoll_free_async(netpoll
);
1039 #endif /* CONFIG_NET_POLL_CONTROLLER */
1041 static int macvlan_dev_get_iflink(const struct net_device
*dev
)
1043 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1045 return vlan
->lowerdev
->ifindex
;
1048 static const struct ethtool_ops macvlan_ethtool_ops
= {
1049 .get_link
= ethtool_op_get_link
,
1050 .get_link_ksettings
= macvlan_ethtool_get_link_ksettings
,
1051 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
1054 static const struct net_device_ops macvlan_netdev_ops
= {
1055 .ndo_init
= macvlan_init
,
1056 .ndo_uninit
= macvlan_uninit
,
1057 .ndo_open
= macvlan_open
,
1058 .ndo_stop
= macvlan_stop
,
1059 .ndo_start_xmit
= macvlan_start_xmit
,
1060 .ndo_change_mtu
= macvlan_change_mtu
,
1061 .ndo_fix_features
= macvlan_fix_features
,
1062 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
1063 .ndo_set_mac_address
= macvlan_set_mac_address
,
1064 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
1065 .ndo_get_stats64
= macvlan_dev_get_stats64
,
1066 .ndo_validate_addr
= eth_validate_addr
,
1067 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
1068 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
1069 .ndo_fdb_add
= macvlan_fdb_add
,
1070 .ndo_fdb_del
= macvlan_fdb_del
,
1071 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
1072 .ndo_get_lock_subclass
= macvlan_get_nest_level
,
1073 #ifdef CONFIG_NET_POLL_CONTROLLER
1074 .ndo_poll_controller
= macvlan_dev_poll_controller
,
1075 .ndo_netpoll_setup
= macvlan_dev_netpoll_setup
,
1076 .ndo_netpoll_cleanup
= macvlan_dev_netpoll_cleanup
,
1078 .ndo_get_iflink
= macvlan_dev_get_iflink
,
1079 .ndo_features_check
= passthru_features_check
,
1082 void macvlan_common_setup(struct net_device
*dev
)
1087 dev
->max_mtu
= ETH_MAX_MTU
;
1088 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1089 netif_keep_dst(dev
);
1090 dev
->priv_flags
|= IFF_UNICAST_FLT
;
1091 dev
->netdev_ops
= &macvlan_netdev_ops
;
1092 dev
->needs_free_netdev
= true;
1093 dev
->header_ops
= &macvlan_hard_header_ops
;
1094 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
1096 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
1098 static void macvlan_setup(struct net_device
*dev
)
1100 macvlan_common_setup(dev
);
1101 dev
->priv_flags
|= IFF_NO_QUEUE
;
1104 static int macvlan_port_create(struct net_device
*dev
)
1106 struct macvlan_port
*port
;
1110 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
1113 if (netdev_is_rx_handler_busy(dev
))
1116 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
1120 port
->passthru
= false;
1122 INIT_LIST_HEAD(&port
->vlans
);
1123 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1124 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
1125 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1126 INIT_HLIST_HEAD(&port
->vlan_source_hash
[i
]);
1128 skb_queue_head_init(&port
->bc_queue
);
1129 INIT_WORK(&port
->bc_work
, macvlan_process_broadcast
);
1131 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
1135 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
1139 static void macvlan_port_destroy(struct net_device
*dev
)
1141 struct macvlan_port
*port
= macvlan_port_get_rtnl(dev
);
1142 struct sk_buff
*skb
;
1144 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
1145 netdev_rx_handler_unregister(dev
);
1147 /* After this point, no packet can schedule bc_work anymore,
1148 * but we need to cancel it and purge left skbs if any.
1150 cancel_work_sync(&port
->bc_work
);
1152 while ((skb
= __skb_dequeue(&port
->bc_queue
))) {
1153 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
1164 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
1166 if (tb
[IFLA_ADDRESS
]) {
1167 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
1169 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
1170 return -EADDRNOTAVAIL
;
1173 if (data
&& data
[IFLA_MACVLAN_FLAGS
] &&
1174 nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]) & ~MACVLAN_FLAG_NOPROMISC
)
1177 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1178 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
1179 case MACVLAN_MODE_PRIVATE
:
1180 case MACVLAN_MODE_VEPA
:
1181 case MACVLAN_MODE_BRIDGE
:
1182 case MACVLAN_MODE_PASSTHRU
:
1183 case MACVLAN_MODE_SOURCE
:
1190 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1191 switch (nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
])) {
1192 case MACVLAN_MACADDR_ADD
:
1193 case MACVLAN_MACADDR_DEL
:
1194 case MACVLAN_MACADDR_FLUSH
:
1195 case MACVLAN_MACADDR_SET
:
1202 if (data
&& data
[IFLA_MACVLAN_MACADDR
]) {
1203 if (nla_len(data
[IFLA_MACVLAN_MACADDR
]) != ETH_ALEN
)
1206 if (!is_valid_ether_addr(nla_data(data
[IFLA_MACVLAN_MACADDR
])))
1207 return -EADDRNOTAVAIL
;
1210 if (data
&& data
[IFLA_MACVLAN_MACADDR_COUNT
])
1217 * reconfigure list of remote source mac address
1218 * (only for macvlan devices in source mode)
1219 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1220 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1222 static int macvlan_changelink_sources(struct macvlan_dev
*vlan
, u32 mode
,
1223 struct nlattr
*data
[])
1227 struct nlattr
*nla
, *head
;
1228 struct macvlan_source_entry
*entry
;
1230 if (data
[IFLA_MACVLAN_MACADDR
])
1231 addr
= nla_data(data
[IFLA_MACVLAN_MACADDR
]);
1233 if (mode
== MACVLAN_MACADDR_ADD
) {
1237 return macvlan_hash_add_source(vlan
, addr
);
1239 } else if (mode
== MACVLAN_MACADDR_DEL
) {
1243 entry
= macvlan_hash_lookup_source(vlan
, addr
);
1245 macvlan_hash_del_source(entry
);
1246 vlan
->macaddr_count
--;
1248 } else if (mode
== MACVLAN_MACADDR_FLUSH
) {
1249 macvlan_flush_sources(vlan
->port
, vlan
);
1250 } else if (mode
== MACVLAN_MACADDR_SET
) {
1251 macvlan_flush_sources(vlan
->port
, vlan
);
1254 ret
= macvlan_hash_add_source(vlan
, addr
);
1259 if (!data
|| !data
[IFLA_MACVLAN_MACADDR_DATA
])
1262 head
= nla_data(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1263 len
= nla_len(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1265 nla_for_each_attr(nla
, head
, len
, rem
) {
1266 if (nla_type(nla
) != IFLA_MACVLAN_MACADDR
||
1267 nla_len(nla
) != ETH_ALEN
)
1270 addr
= nla_data(nla
);
1271 ret
= macvlan_hash_add_source(vlan
, addr
);
1282 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
1283 struct nlattr
*tb
[], struct nlattr
*data
[])
1285 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1286 struct macvlan_port
*port
;
1287 struct net_device
*lowerdev
;
1290 bool create
= false;
1295 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
1296 if (lowerdev
== NULL
)
1299 /* When creating macvlans or macvtaps on top of other macvlans - use
1300 * the real device as the lowerdev.
1302 if (netif_is_macvlan(lowerdev
))
1303 lowerdev
= macvlan_dev_real_dev(lowerdev
);
1306 dev
->mtu
= lowerdev
->mtu
;
1307 else if (dev
->mtu
> lowerdev
->mtu
)
1310 /* MTU range: 68 - lowerdev->max_mtu */
1311 dev
->min_mtu
= ETH_MIN_MTU
;
1312 dev
->max_mtu
= lowerdev
->max_mtu
;
1314 if (!tb
[IFLA_ADDRESS
])
1315 eth_hw_addr_random(dev
);
1317 if (!macvlan_port_exists(lowerdev
)) {
1318 err
= macvlan_port_create(lowerdev
);
1323 port
= macvlan_port_get_rtnl(lowerdev
);
1325 /* Only 1 macvlan device can be created in passthru mode */
1326 if (port
->passthru
) {
1327 /* The macvlan port must be not created this time,
1328 * still goto destroy_macvlan_port for readability.
1331 goto destroy_macvlan_port
;
1334 vlan
->lowerdev
= lowerdev
;
1337 vlan
->set_features
= MACVLAN_FEATURES
;
1338 vlan
->nest_level
= dev_get_nest_level(lowerdev
) + 1;
1340 vlan
->mode
= MACVLAN_MODE_VEPA
;
1341 if (data
&& data
[IFLA_MACVLAN_MODE
])
1342 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1344 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
1345 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1347 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
1350 goto destroy_macvlan_port
;
1352 port
->passthru
= true;
1353 eth_hw_addr_inherit(dev
, lowerdev
);
1356 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1357 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
) {
1359 goto destroy_macvlan_port
;
1361 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1362 err
= macvlan_changelink_sources(vlan
, macmode
, data
);
1364 goto destroy_macvlan_port
;
1367 err
= register_netdevice(dev
);
1369 goto destroy_macvlan_port
;
1371 dev
->priv_flags
|= IFF_MACVLAN
;
1372 err
= netdev_upper_dev_link(lowerdev
, dev
);
1374 goto unregister_netdev
;
1376 list_add_tail_rcu(&vlan
->list
, &port
->vlans
);
1377 netif_stacked_transfer_operstate(lowerdev
, dev
);
1378 linkwatch_fire_event(dev
);
1383 unregister_netdevice(dev
);
1384 destroy_macvlan_port
:
1386 macvlan_port_destroy(port
->dev
);
1389 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
1391 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
1392 struct nlattr
*tb
[], struct nlattr
*data
[])
1394 return macvlan_common_newlink(src_net
, dev
, tb
, data
);
1397 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
1399 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1401 if (vlan
->mode
== MACVLAN_MODE_SOURCE
)
1402 macvlan_flush_sources(vlan
->port
, vlan
);
1403 list_del_rcu(&vlan
->list
);
1404 unregister_netdevice_queue(dev
, head
);
1405 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
1407 EXPORT_SYMBOL_GPL(macvlan_dellink
);
1409 static int macvlan_changelink(struct net_device
*dev
,
1410 struct nlattr
*tb
[], struct nlattr
*data
[])
1412 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1413 enum macvlan_mode mode
;
1414 bool set_mode
= false;
1415 enum macvlan_macaddr_mode macmode
;
1418 /* Validate mode, but don't set yet: setting flags may fail. */
1419 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1421 mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1422 /* Passthrough mode can't be set or cleared dynamically */
1423 if ((mode
== MACVLAN_MODE_PASSTHRU
) !=
1424 (vlan
->mode
== MACVLAN_MODE_PASSTHRU
))
1426 if (vlan
->mode
== MACVLAN_MODE_SOURCE
&&
1428 macvlan_flush_sources(vlan
->port
, vlan
);
1431 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
1432 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1433 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
1434 if (vlan
->port
->passthru
&& promisc
) {
1437 if (flags
& MACVLAN_FLAG_NOPROMISC
)
1438 err
= dev_set_promiscuity(vlan
->lowerdev
, -1);
1440 err
= dev_set_promiscuity(vlan
->lowerdev
, 1);
1444 vlan
->flags
= flags
;
1448 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1449 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
)
1451 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1452 ret
= macvlan_changelink_sources(vlan
, macmode
, data
);
1459 static size_t macvlan_get_size_mac(const struct macvlan_dev
*vlan
)
1461 if (vlan
->macaddr_count
== 0)
1463 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1464 + vlan
->macaddr_count
* nla_total_size(sizeof(u8
) * ETH_ALEN
);
1467 static size_t macvlan_get_size(const struct net_device
*dev
)
1469 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1472 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1473 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1474 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1475 + macvlan_get_size_mac(vlan
) /* IFLA_MACVLAN_MACADDR */
1479 static int macvlan_fill_info_macaddr(struct sk_buff
*skb
,
1480 const struct macvlan_dev
*vlan
,
1483 struct hlist_head
*h
= &vlan
->port
->vlan_source_hash
[i
];
1484 struct macvlan_source_entry
*entry
;
1486 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
1487 if (entry
->vlan
!= vlan
)
1489 if (nla_put(skb
, IFLA_MACVLAN_MACADDR
, ETH_ALEN
, entry
->addr
))
1495 static int macvlan_fill_info(struct sk_buff
*skb
,
1496 const struct net_device
*dev
)
1498 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1500 struct nlattr
*nest
;
1502 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
1503 goto nla_put_failure
;
1504 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
1505 goto nla_put_failure
;
1506 if (nla_put_u32(skb
, IFLA_MACVLAN_MACADDR_COUNT
, vlan
->macaddr_count
))
1507 goto nla_put_failure
;
1508 if (vlan
->macaddr_count
> 0) {
1509 nest
= nla_nest_start(skb
, IFLA_MACVLAN_MACADDR_DATA
);
1511 goto nla_put_failure
;
1513 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
1514 if (macvlan_fill_info_macaddr(skb
, vlan
, i
))
1515 goto nla_put_failure
;
1517 nla_nest_end(skb
, nest
);
1525 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
1526 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
1527 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
1528 [IFLA_MACVLAN_MACADDR_MODE
] = { .type
= NLA_U32
},
1529 [IFLA_MACVLAN_MACADDR
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1530 [IFLA_MACVLAN_MACADDR_DATA
] = { .type
= NLA_NESTED
},
1531 [IFLA_MACVLAN_MACADDR_COUNT
] = { .type
= NLA_U32
},
1534 int macvlan_link_register(struct rtnl_link_ops
*ops
)
1537 ops
->validate
= macvlan_validate
;
1538 ops
->maxtype
= IFLA_MACVLAN_MAX
;
1539 ops
->policy
= macvlan_policy
;
1540 ops
->changelink
= macvlan_changelink
;
1541 ops
->get_size
= macvlan_get_size
;
1542 ops
->fill_info
= macvlan_fill_info
;
1544 return rtnl_link_register(ops
);
1546 EXPORT_SYMBOL_GPL(macvlan_link_register
);
1548 static struct net
*macvlan_get_link_net(const struct net_device
*dev
)
1550 return dev_net(macvlan_dev_real_dev(dev
));
1553 static struct rtnl_link_ops macvlan_link_ops
= {
1555 .setup
= macvlan_setup
,
1556 .newlink
= macvlan_newlink
,
1557 .dellink
= macvlan_dellink
,
1558 .get_link_net
= macvlan_get_link_net
,
1559 .priv_size
= sizeof(struct macvlan_dev
),
1562 static int macvlan_device_event(struct notifier_block
*unused
,
1563 unsigned long event
, void *ptr
)
1565 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1566 struct macvlan_dev
*vlan
, *next
;
1567 struct macvlan_port
*port
;
1568 LIST_HEAD(list_kill
);
1570 if (!macvlan_port_exists(dev
))
1573 port
= macvlan_port_get_rtnl(dev
);
1578 list_for_each_entry(vlan
, &port
->vlans
, list
)
1579 netif_stacked_transfer_operstate(vlan
->lowerdev
,
1582 case NETDEV_FEAT_CHANGE
:
1583 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1584 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
1585 vlan
->dev
->gso_max_segs
= dev
->gso_max_segs
;
1586 netdev_update_features(vlan
->dev
);
1589 case NETDEV_CHANGEMTU
:
1590 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1591 if (vlan
->dev
->mtu
<= dev
->mtu
)
1593 dev_set_mtu(vlan
->dev
, dev
->mtu
);
1596 case NETDEV_CHANGEADDR
:
1597 if (!port
->passthru
)
1600 vlan
= list_first_entry_or_null(&port
->vlans
,
1604 if (macvlan_sync_address(vlan
->dev
, dev
->dev_addr
))
1608 case NETDEV_UNREGISTER
:
1609 /* twiddle thumbs on netns device moves */
1610 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
1613 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
1614 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
1615 unregister_netdevice_many(&list_kill
);
1617 case NETDEV_PRE_TYPE_CHANGE
:
1618 /* Forbid underlaying device to change its type. */
1621 case NETDEV_NOTIFY_PEERS
:
1622 case NETDEV_BONDING_FAILOVER
:
1623 case NETDEV_RESEND_IGMP
:
1624 /* Propagate to all vlans */
1625 list_for_each_entry(vlan
, &port
->vlans
, list
)
1626 call_netdevice_notifiers(event
, vlan
->dev
);
1631 static struct notifier_block macvlan_notifier_block __read_mostly
= {
1632 .notifier_call
= macvlan_device_event
,
1635 static int __init
macvlan_init_module(void)
1639 register_netdevice_notifier(&macvlan_notifier_block
);
1641 err
= macvlan_link_register(&macvlan_link_ops
);
1646 unregister_netdevice_notifier(&macvlan_notifier_block
);
1650 static void __exit
macvlan_cleanup_module(void)
1652 rtnl_link_unregister(&macvlan_link_ops
);
1653 unregister_netdevice_notifier(&macvlan_notifier_block
);
1656 module_init(macvlan_init_module
);
1657 module_exit(macvlan_cleanup_module
);
1659 MODULE_LICENSE("GPL");
1660 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1661 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1662 MODULE_ALIAS_RTNL_LINK("macvlan");