2 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
9 * The code this is based on carried the following copyright notice:
11 * (C) Copyright 2001-2006
12 * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com
13 * Re-worked by Ben Greear <greearb@candelatech.com>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/errno.h>
21 #include <linux/slab.h>
22 #include <linux/string.h>
23 #include <linux/rculist.h>
24 #include <linux/notifier.h>
25 #include <linux/netdevice.h>
26 #include <linux/etherdevice.h>
27 #include <linux/ethtool.h>
28 #include <linux/if_arp.h>
29 #include <linux/if_vlan.h>
30 #include <linux/if_link.h>
31 #include <linux/if_macvlan.h>
32 #include <linux/hash.h>
33 #include <linux/workqueue.h>
34 #include <net/rtnetlink.h>
36 #include <linux/netpoll.h>
38 #define MACVLAN_HASH_BITS 8
39 #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS)
40 #define MACVLAN_BC_QUEUE_LEN 1000
43 struct net_device
*dev
;
44 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
45 struct list_head vlans
;
47 struct sk_buff_head bc_queue
;
48 struct work_struct bc_work
;
51 struct hlist_head vlan_source_hash
[MACVLAN_HASH_SIZE
];
52 DECLARE_BITMAP(mc_filter
, MACVLAN_MC_FILTER_SZ
);
55 struct macvlan_source_entry
{
56 struct hlist_node hlist
;
57 struct macvlan_dev
*vlan
;
58 unsigned char addr
[6+2] __aligned(sizeof(u16
));
62 struct macvlan_skb_cb
{
63 const struct macvlan_dev
*src
;
66 #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
68 static void macvlan_port_destroy(struct net_device
*dev
);
70 /* Hash Ethernet address */
71 static u32
macvlan_eth_hash(const unsigned char *addr
)
73 u64 value
= get_unaligned((u64
*)addr
);
75 /* only want 6 bytes */
81 return hash_64(value
, MACVLAN_HASH_BITS
);
84 static struct macvlan_port
*macvlan_port_get_rcu(const struct net_device
*dev
)
86 return rcu_dereference(dev
->rx_handler_data
);
89 static struct macvlan_port
*macvlan_port_get_rtnl(const struct net_device
*dev
)
91 return rtnl_dereference(dev
->rx_handler_data
);
94 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
96 static struct macvlan_dev
*macvlan_hash_lookup(const struct macvlan_port
*port
,
97 const unsigned char *addr
)
99 struct macvlan_dev
*vlan
;
100 u32 idx
= macvlan_eth_hash(addr
);
102 hlist_for_each_entry_rcu(vlan
, &port
->vlan_hash
[idx
], hlist
) {
103 if (ether_addr_equal_64bits(vlan
->dev
->dev_addr
, addr
))
109 static struct macvlan_source_entry
*macvlan_hash_lookup_source(
110 const struct macvlan_dev
*vlan
,
111 const unsigned char *addr
)
113 struct macvlan_source_entry
*entry
;
114 u32 idx
= macvlan_eth_hash(addr
);
115 struct hlist_head
*h
= &vlan
->port
->vlan_source_hash
[idx
];
117 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
118 if (ether_addr_equal_64bits(entry
->addr
, addr
) &&
125 static int macvlan_hash_add_source(struct macvlan_dev
*vlan
,
126 const unsigned char *addr
)
128 struct macvlan_port
*port
= vlan
->port
;
129 struct macvlan_source_entry
*entry
;
130 struct hlist_head
*h
;
132 entry
= macvlan_hash_lookup_source(vlan
, addr
);
136 entry
= kmalloc(sizeof(*entry
), GFP_KERNEL
);
140 ether_addr_copy(entry
->addr
, addr
);
142 h
= &port
->vlan_source_hash
[macvlan_eth_hash(addr
)];
143 hlist_add_head_rcu(&entry
->hlist
, h
);
144 vlan
->macaddr_count
++;
149 static void macvlan_hash_add(struct macvlan_dev
*vlan
)
151 struct macvlan_port
*port
= vlan
->port
;
152 const unsigned char *addr
= vlan
->dev
->dev_addr
;
153 u32 idx
= macvlan_eth_hash(addr
);
155 hlist_add_head_rcu(&vlan
->hlist
, &port
->vlan_hash
[idx
]);
158 static void macvlan_hash_del_source(struct macvlan_source_entry
*entry
)
160 hlist_del_rcu(&entry
->hlist
);
161 kfree_rcu(entry
, rcu
);
164 static void macvlan_hash_del(struct macvlan_dev
*vlan
, bool sync
)
166 hlist_del_rcu(&vlan
->hlist
);
171 static void macvlan_hash_change_addr(struct macvlan_dev
*vlan
,
172 const unsigned char *addr
)
174 macvlan_hash_del(vlan
, true);
175 /* Now that we are unhashed it is safe to change the device
176 * address without confusing packet delivery.
178 memcpy(vlan
->dev
->dev_addr
, addr
, ETH_ALEN
);
179 macvlan_hash_add(vlan
);
182 static int macvlan_addr_busy(const struct macvlan_port
*port
,
183 const unsigned char *addr
)
185 /* Test to see if the specified multicast address is
186 * currently in use by the underlying device or
189 if (ether_addr_equal_64bits(port
->dev
->dev_addr
, addr
))
192 if (macvlan_hash_lookup(port
, addr
))
199 static int macvlan_broadcast_one(struct sk_buff
*skb
,
200 const struct macvlan_dev
*vlan
,
201 const struct ethhdr
*eth
, bool local
)
203 struct net_device
*dev
= vlan
->dev
;
206 return __dev_forward_skb(dev
, skb
);
209 if (ether_addr_equal_64bits(eth
->h_dest
, dev
->broadcast
))
210 skb
->pkt_type
= PACKET_BROADCAST
;
212 skb
->pkt_type
= PACKET_MULTICAST
;
217 static u32
macvlan_hash_mix(const struct macvlan_dev
*vlan
)
219 return (u32
)(((unsigned long)vlan
) >> L1_CACHE_SHIFT
);
223 static unsigned int mc_hash(const struct macvlan_dev
*vlan
,
224 const unsigned char *addr
)
226 u32 val
= __get_unaligned_cpu32(addr
+ 2);
228 val
^= macvlan_hash_mix(vlan
);
229 return hash_32(val
, MACVLAN_MC_FILTER_BITS
);
232 static void macvlan_broadcast(struct sk_buff
*skb
,
233 const struct macvlan_port
*port
,
234 struct net_device
*src
,
235 enum macvlan_mode mode
)
237 const struct ethhdr
*eth
= eth_hdr(skb
);
238 const struct macvlan_dev
*vlan
;
239 struct sk_buff
*nskb
;
244 if (skb
->protocol
== htons(ETH_P_PAUSE
))
247 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
248 hlist_for_each_entry_rcu(vlan
, &port
->vlan_hash
[i
], hlist
) {
249 if (vlan
->dev
== src
|| !(vlan
->mode
& mode
))
252 hash
= mc_hash(vlan
, eth
->h_dest
);
253 if (!test_bit(hash
, vlan
->mc_filter
))
257 nskb
= skb_clone(skb
, GFP_ATOMIC
);
259 err
= macvlan_broadcast_one(
261 mode
== MACVLAN_MODE_BRIDGE
) ?:
263 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
264 err
== NET_RX_SUCCESS
, true);
269 static void macvlan_process_broadcast(struct work_struct
*w
)
271 struct macvlan_port
*port
= container_of(w
, struct macvlan_port
,
274 struct sk_buff_head list
;
276 __skb_queue_head_init(&list
);
278 spin_lock_bh(&port
->bc_queue
.lock
);
279 skb_queue_splice_tail_init(&port
->bc_queue
, &list
);
280 spin_unlock_bh(&port
->bc_queue
.lock
);
282 while ((skb
= __skb_dequeue(&list
))) {
283 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
288 /* frame comes from an external address */
289 macvlan_broadcast(skb
, port
, NULL
,
290 MACVLAN_MODE_PRIVATE
|
292 MACVLAN_MODE_PASSTHRU
|
293 MACVLAN_MODE_BRIDGE
);
294 else if (src
->mode
== MACVLAN_MODE_VEPA
)
295 /* flood to everyone except source */
296 macvlan_broadcast(skb
, port
, src
->dev
,
298 MACVLAN_MODE_BRIDGE
);
301 * flood only to VEPA ports, bridge ports
302 * already saw the frame on the way out.
304 macvlan_broadcast(skb
, port
, src
->dev
,
315 static void macvlan_broadcast_enqueue(struct macvlan_port
*port
,
316 const struct macvlan_dev
*src
,
319 struct sk_buff
*nskb
;
322 nskb
= skb_clone(skb
, GFP_ATOMIC
);
326 MACVLAN_SKB_CB(nskb
)->src
= src
;
328 spin_lock(&port
->bc_queue
.lock
);
329 if (skb_queue_len(&port
->bc_queue
) < MACVLAN_BC_QUEUE_LEN
) {
332 __skb_queue_tail(&port
->bc_queue
, nskb
);
335 spin_unlock(&port
->bc_queue
.lock
);
340 schedule_work(&port
->bc_work
);
346 atomic_long_inc(&skb
->dev
->rx_dropped
);
349 static void macvlan_flush_sources(struct macvlan_port
*port
,
350 struct macvlan_dev
*vlan
)
354 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
355 struct hlist_node
*h
, *n
;
357 hlist_for_each_safe(h
, n
, &port
->vlan_source_hash
[i
]) {
358 struct macvlan_source_entry
*entry
;
360 entry
= hlist_entry(h
, struct macvlan_source_entry
,
362 if (entry
->vlan
== vlan
)
363 macvlan_hash_del_source(entry
);
366 vlan
->macaddr_count
= 0;
369 static void macvlan_forward_source_one(struct sk_buff
*skb
,
370 struct macvlan_dev
*vlan
)
372 struct sk_buff
*nskb
;
373 struct net_device
*dev
;
378 if (unlikely(!(dev
->flags
& IFF_UP
)))
381 nskb
= skb_clone(skb
, GFP_ATOMIC
);
385 len
= nskb
->len
+ ETH_HLEN
;
387 nskb
->pkt_type
= PACKET_HOST
;
389 ret
= netif_rx(nskb
);
390 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, false);
393 static void macvlan_forward_source(struct sk_buff
*skb
,
394 struct macvlan_port
*port
,
395 const unsigned char *addr
)
397 struct macvlan_source_entry
*entry
;
398 u32 idx
= macvlan_eth_hash(addr
);
399 struct hlist_head
*h
= &port
->vlan_source_hash
[idx
];
401 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
402 if (ether_addr_equal_64bits(entry
->addr
, addr
))
403 if (entry
->vlan
->dev
->flags
& IFF_UP
)
404 macvlan_forward_source_one(skb
, entry
->vlan
);
408 /* called under rcu_read_lock() from netif_receive_skb */
409 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
411 struct macvlan_port
*port
;
412 struct sk_buff
*skb
= *pskb
;
413 const struct ethhdr
*eth
= eth_hdr(skb
);
414 const struct macvlan_dev
*vlan
;
415 const struct macvlan_dev
*src
;
416 struct net_device
*dev
;
417 unsigned int len
= 0;
419 rx_handler_result_t handle_res
;
421 port
= macvlan_port_get_rcu(skb
->dev
);
422 if (is_multicast_ether_addr(eth
->h_dest
)) {
425 skb
= ip_check_defrag(dev_net(skb
->dev
), skb
, IP_DEFRAG_MACVLAN
);
427 return RX_HANDLER_CONSUMED
;
430 macvlan_forward_source(skb
, port
, eth
->h_source
);
431 src
= macvlan_hash_lookup(port
, eth
->h_source
);
432 if (src
&& src
->mode
!= MACVLAN_MODE_VEPA
&&
433 src
->mode
!= MACVLAN_MODE_BRIDGE
) {
434 /* forward to original port. */
436 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0) ?:
438 handle_res
= RX_HANDLER_CONSUMED
;
442 hash
= mc_hash(NULL
, eth
->h_dest
);
443 if (test_bit(hash
, port
->mc_filter
))
444 macvlan_broadcast_enqueue(port
, src
, skb
);
446 return RX_HANDLER_PASS
;
449 macvlan_forward_source(skb
, port
, eth
->h_source
);
451 vlan
= list_first_or_null_rcu(&port
->vlans
,
452 struct macvlan_dev
, list
);
454 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
456 return RX_HANDLER_PASS
;
459 if (unlikely(!(dev
->flags
& IFF_UP
))) {
461 return RX_HANDLER_CONSUMED
;
463 len
= skb
->len
+ ETH_HLEN
;
464 skb
= skb_share_check(skb
, GFP_ATOMIC
);
467 handle_res
= RX_HANDLER_CONSUMED
;
473 skb
->pkt_type
= PACKET_HOST
;
475 ret
= NET_RX_SUCCESS
;
476 handle_res
= RX_HANDLER_ANOTHER
;
478 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, false);
482 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
484 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
485 const struct macvlan_port
*port
= vlan
->port
;
486 const struct macvlan_dev
*dest
;
488 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
489 const struct ethhdr
*eth
= (void *)skb
->data
;
491 /* send to other bridge ports directly */
492 if (is_multicast_ether_addr(eth
->h_dest
)) {
493 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
497 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
498 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
499 /* send to lowerdev first for its network taps */
500 dev_forward_skb(vlan
->lowerdev
, skb
);
502 return NET_XMIT_SUCCESS
;
507 skb
->dev
= vlan
->lowerdev
;
508 return dev_queue_xmit(skb
);
511 static inline netdev_tx_t
macvlan_netpoll_send_skb(struct macvlan_dev
*vlan
, struct sk_buff
*skb
)
513 #ifdef CONFIG_NET_POLL_CONTROLLER
515 netpoll_send_skb(vlan
->netpoll
, skb
);
522 static netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
523 struct net_device
*dev
)
525 unsigned int len
= skb
->len
;
527 struct macvlan_dev
*vlan
= netdev_priv(dev
);
529 if (unlikely(netpoll_tx_running(dev
)))
530 return macvlan_netpoll_send_skb(vlan
, skb
);
532 if (vlan
->fwd_priv
) {
533 skb
->dev
= vlan
->lowerdev
;
534 ret
= dev_queue_xmit_accel(skb
, vlan
->fwd_priv
);
536 ret
= macvlan_queue_xmit(skb
, dev
);
539 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
540 struct vlan_pcpu_stats
*pcpu_stats
;
542 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
543 u64_stats_update_begin(&pcpu_stats
->syncp
);
544 pcpu_stats
->tx_packets
++;
545 pcpu_stats
->tx_bytes
+= len
;
546 u64_stats_update_end(&pcpu_stats
->syncp
);
548 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
553 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
554 unsigned short type
, const void *daddr
,
555 const void *saddr
, unsigned len
)
557 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
558 struct net_device
*lowerdev
= vlan
->lowerdev
;
560 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
561 saddr
? : dev
->dev_addr
, len
);
564 static const struct header_ops macvlan_hard_header_ops
= {
565 .create
= macvlan_hard_header
,
566 .parse
= eth_header_parse
,
567 .cache
= eth_header_cache
,
568 .cache_update
= eth_header_cache_update
,
571 static struct rtnl_link_ops macvlan_link_ops
;
573 static int macvlan_open(struct net_device
*dev
)
575 struct macvlan_dev
*vlan
= netdev_priv(dev
);
576 struct net_device
*lowerdev
= vlan
->lowerdev
;
579 if (vlan
->port
->passthru
) {
580 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
)) {
581 err
= dev_set_promiscuity(lowerdev
, 1);
588 if (lowerdev
->features
& NETIF_F_HW_L2FW_DOFFLOAD
&&
589 dev
->rtnl_link_ops
== &macvlan_link_ops
) {
591 lowerdev
->netdev_ops
->ndo_dfwd_add_station(lowerdev
, dev
);
593 /* If we get a NULL pointer back, or if we get an error
594 * then we should just fall through to the non accelerated path
596 if (IS_ERR_OR_NULL(vlan
->fwd_priv
)) {
597 vlan
->fwd_priv
= NULL
;
603 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
606 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
609 if (dev
->flags
& IFF_ALLMULTI
) {
610 err
= dev_set_allmulti(lowerdev
, 1);
615 if (dev
->flags
& IFF_PROMISC
) {
616 err
= dev_set_promiscuity(lowerdev
, 1);
622 macvlan_hash_add(vlan
);
626 if (dev
->flags
& IFF_ALLMULTI
)
627 dev_set_allmulti(lowerdev
, -1);
629 dev_uc_del(lowerdev
, dev
->dev_addr
);
631 if (vlan
->fwd_priv
) {
632 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
634 vlan
->fwd_priv
= NULL
;
639 static int macvlan_stop(struct net_device
*dev
)
641 struct macvlan_dev
*vlan
= netdev_priv(dev
);
642 struct net_device
*lowerdev
= vlan
->lowerdev
;
644 if (vlan
->fwd_priv
) {
645 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
647 vlan
->fwd_priv
= NULL
;
651 dev_uc_unsync(lowerdev
, dev
);
652 dev_mc_unsync(lowerdev
, dev
);
654 if (vlan
->port
->passthru
) {
655 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
656 dev_set_promiscuity(lowerdev
, -1);
660 if (dev
->flags
& IFF_ALLMULTI
)
661 dev_set_allmulti(lowerdev
, -1);
663 if (dev
->flags
& IFF_PROMISC
)
664 dev_set_promiscuity(lowerdev
, -1);
666 dev_uc_del(lowerdev
, dev
->dev_addr
);
669 macvlan_hash_del(vlan
, !dev
->dismantle
);
673 static int macvlan_sync_address(struct net_device
*dev
, unsigned char *addr
)
675 struct macvlan_dev
*vlan
= netdev_priv(dev
);
676 struct net_device
*lowerdev
= vlan
->lowerdev
;
679 if (!(dev
->flags
& IFF_UP
)) {
680 /* Just copy in the new address */
681 ether_addr_copy(dev
->dev_addr
, addr
);
683 /* Rehash and update the device filters */
684 if (macvlan_addr_busy(vlan
->port
, addr
))
687 if (!vlan
->port
->passthru
) {
688 err
= dev_uc_add(lowerdev
, addr
);
692 dev_uc_del(lowerdev
, dev
->dev_addr
);
695 macvlan_hash_change_addr(vlan
, addr
);
700 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
702 struct macvlan_dev
*vlan
= netdev_priv(dev
);
703 struct sockaddr
*addr
= p
;
705 if (!is_valid_ether_addr(addr
->sa_data
))
706 return -EADDRNOTAVAIL
;
708 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
709 dev_set_mac_address(vlan
->lowerdev
, addr
);
713 return macvlan_sync_address(dev
, addr
->sa_data
);
716 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
718 struct macvlan_dev
*vlan
= netdev_priv(dev
);
719 struct net_device
*lowerdev
= vlan
->lowerdev
;
721 if (dev
->flags
& IFF_UP
) {
722 if (change
& IFF_ALLMULTI
)
723 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
724 if (change
& IFF_PROMISC
)
725 dev_set_promiscuity(lowerdev
,
726 dev
->flags
& IFF_PROMISC
? 1 : -1);
731 static void macvlan_compute_filter(unsigned long *mc_filter
,
732 struct net_device
*dev
,
733 struct macvlan_dev
*vlan
)
735 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
736 bitmap_fill(mc_filter
, MACVLAN_MC_FILTER_SZ
);
738 struct netdev_hw_addr
*ha
;
739 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
741 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
742 netdev_for_each_mc_addr(ha
, dev
) {
743 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
746 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
748 bitmap_copy(mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
752 static void macvlan_set_mac_lists(struct net_device
*dev
)
754 struct macvlan_dev
*vlan
= netdev_priv(dev
);
756 macvlan_compute_filter(vlan
->mc_filter
, dev
, vlan
);
758 dev_uc_sync(vlan
->lowerdev
, dev
);
759 dev_mc_sync(vlan
->lowerdev
, dev
);
761 /* This is slightly inaccurate as we're including the subscription
762 * list of vlan->lowerdev too.
764 * Bug alert: This only works if everyone has the same broadcast
765 * address as lowerdev. As soon as someone changes theirs this
768 * However, this is already broken as when you change your broadcast
769 * address we don't get called.
771 * The solution is to maintain a list of broadcast addresses like
772 * we do for uc/mc, if you care.
774 macvlan_compute_filter(vlan
->port
->mc_filter
, vlan
->lowerdev
, NULL
);
777 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
779 struct macvlan_dev
*vlan
= netdev_priv(dev
);
781 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
788 * macvlan network devices have devices nesting below it and are a special
789 * "super class" of normal network devices; split their locks off into a
790 * separate class since they always nest.
792 static struct lock_class_key macvlan_netdev_addr_lock_key
;
794 #define ALWAYS_ON_FEATURES \
795 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \
798 #define MACVLAN_FEATURES \
799 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
800 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \
801 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
802 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
804 #define MACVLAN_STATE_MASK \
805 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
807 static int macvlan_get_nest_level(struct net_device
*dev
)
809 return ((struct macvlan_dev
*)netdev_priv(dev
))->nest_level
;
812 static void macvlan_set_lockdep_class(struct net_device
*dev
)
814 netdev_lockdep_set_classes(dev
);
815 lockdep_set_class_and_subclass(&dev
->addr_list_lock
,
816 &macvlan_netdev_addr_lock_key
,
817 macvlan_get_nest_level(dev
));
820 static int macvlan_init(struct net_device
*dev
)
822 struct macvlan_dev
*vlan
= netdev_priv(dev
);
823 const struct net_device
*lowerdev
= vlan
->lowerdev
;
824 struct macvlan_port
*port
= vlan
->port
;
826 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
827 (lowerdev
->state
& MACVLAN_STATE_MASK
);
828 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
829 dev
->features
|= ALWAYS_ON_FEATURES
;
830 dev
->hw_features
|= NETIF_F_LRO
;
831 dev
->vlan_features
= lowerdev
->vlan_features
& MACVLAN_FEATURES
;
832 dev
->gso_max_size
= lowerdev
->gso_max_size
;
833 dev
->gso_max_segs
= lowerdev
->gso_max_segs
;
834 dev
->hard_header_len
= lowerdev
->hard_header_len
;
836 macvlan_set_lockdep_class(dev
);
838 vlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct vlan_pcpu_stats
);
839 if (!vlan
->pcpu_stats
)
847 static void macvlan_uninit(struct net_device
*dev
)
849 struct macvlan_dev
*vlan
= netdev_priv(dev
);
850 struct macvlan_port
*port
= vlan
->port
;
852 free_percpu(vlan
->pcpu_stats
);
854 macvlan_flush_sources(port
, vlan
);
857 macvlan_port_destroy(port
->dev
);
860 static struct rtnl_link_stats64
*macvlan_dev_get_stats64(struct net_device
*dev
,
861 struct rtnl_link_stats64
*stats
)
863 struct macvlan_dev
*vlan
= netdev_priv(dev
);
865 if (vlan
->pcpu_stats
) {
866 struct vlan_pcpu_stats
*p
;
867 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
868 u32 rx_errors
= 0, tx_dropped
= 0;
872 for_each_possible_cpu(i
) {
873 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
875 start
= u64_stats_fetch_begin_irq(&p
->syncp
);
876 rx_packets
= p
->rx_packets
;
877 rx_bytes
= p
->rx_bytes
;
878 rx_multicast
= p
->rx_multicast
;
879 tx_packets
= p
->tx_packets
;
880 tx_bytes
= p
->tx_bytes
;
881 } while (u64_stats_fetch_retry_irq(&p
->syncp
, start
));
883 stats
->rx_packets
+= rx_packets
;
884 stats
->rx_bytes
+= rx_bytes
;
885 stats
->multicast
+= rx_multicast
;
886 stats
->tx_packets
+= tx_packets
;
887 stats
->tx_bytes
+= tx_bytes
;
888 /* rx_errors & tx_dropped are u32, updated
889 * without syncp protection.
891 rx_errors
+= p
->rx_errors
;
892 tx_dropped
+= p
->tx_dropped
;
894 stats
->rx_errors
= rx_errors
;
895 stats
->rx_dropped
= rx_errors
;
896 stats
->tx_dropped
= tx_dropped
;
901 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
902 __be16 proto
, u16 vid
)
904 struct macvlan_dev
*vlan
= netdev_priv(dev
);
905 struct net_device
*lowerdev
= vlan
->lowerdev
;
907 return vlan_vid_add(lowerdev
, proto
, vid
);
910 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
911 __be16 proto
, u16 vid
)
913 struct macvlan_dev
*vlan
= netdev_priv(dev
);
914 struct net_device
*lowerdev
= vlan
->lowerdev
;
916 vlan_vid_del(lowerdev
, proto
, vid
);
920 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
921 struct net_device
*dev
,
922 const unsigned char *addr
, u16 vid
,
925 struct macvlan_dev
*vlan
= netdev_priv(dev
);
928 /* Support unicast filter only on passthru devices.
929 * Multicast filter should be allowed on all devices.
931 if (!vlan
->port
->passthru
&& is_unicast_ether_addr(addr
))
934 if (flags
& NLM_F_REPLACE
)
937 if (is_unicast_ether_addr(addr
))
938 err
= dev_uc_add_excl(dev
, addr
);
939 else if (is_multicast_ether_addr(addr
))
940 err
= dev_mc_add_excl(dev
, addr
);
945 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
946 struct net_device
*dev
,
947 const unsigned char *addr
, u16 vid
)
949 struct macvlan_dev
*vlan
= netdev_priv(dev
);
952 /* Support unicast filter only on passthru devices.
953 * Multicast filter should be allowed on all devices.
955 if (!vlan
->port
->passthru
&& is_unicast_ether_addr(addr
))
958 if (is_unicast_ether_addr(addr
))
959 err
= dev_uc_del(dev
, addr
);
960 else if (is_multicast_ether_addr(addr
))
961 err
= dev_mc_del(dev
, addr
);
966 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
967 struct ethtool_drvinfo
*drvinfo
)
969 strlcpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
970 strlcpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
973 static int macvlan_ethtool_get_link_ksettings(struct net_device
*dev
,
974 struct ethtool_link_ksettings
*cmd
)
976 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
978 return __ethtool_get_link_ksettings(vlan
->lowerdev
, cmd
);
981 static netdev_features_t
macvlan_fix_features(struct net_device
*dev
,
982 netdev_features_t features
)
984 struct macvlan_dev
*vlan
= netdev_priv(dev
);
985 netdev_features_t lowerdev_features
= vlan
->lowerdev
->features
;
986 netdev_features_t mask
;
988 features
|= NETIF_F_ALL_FOR_ALL
;
989 features
&= (vlan
->set_features
| ~MACVLAN_FEATURES
);
992 lowerdev_features
&= (features
| ~NETIF_F_LRO
);
993 features
= netdev_increment_features(lowerdev_features
, features
, mask
);
994 features
|= ALWAYS_ON_FEATURES
;
995 features
&= ~NETIF_F_NETNS_LOCAL
;
1000 #ifdef CONFIG_NET_POLL_CONTROLLER
1001 static void macvlan_dev_poll_controller(struct net_device
*dev
)
1006 static int macvlan_dev_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*npinfo
)
1008 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1009 struct net_device
*real_dev
= vlan
->lowerdev
;
1010 struct netpoll
*netpoll
;
1013 netpoll
= kzalloc(sizeof(*netpoll
), GFP_KERNEL
);
1018 err
= __netpoll_setup(netpoll
, real_dev
);
1024 vlan
->netpoll
= netpoll
;
1030 static void macvlan_dev_netpoll_cleanup(struct net_device
*dev
)
1032 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1033 struct netpoll
*netpoll
= vlan
->netpoll
;
1038 vlan
->netpoll
= NULL
;
1040 __netpoll_free_async(netpoll
);
1042 #endif /* CONFIG_NET_POLL_CONTROLLER */
1044 static int macvlan_dev_get_iflink(const struct net_device
*dev
)
1046 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1048 return vlan
->lowerdev
->ifindex
;
1051 static const struct ethtool_ops macvlan_ethtool_ops
= {
1052 .get_link
= ethtool_op_get_link
,
1053 .get_link_ksettings
= macvlan_ethtool_get_link_ksettings
,
1054 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
1057 static const struct net_device_ops macvlan_netdev_ops
= {
1058 .ndo_init
= macvlan_init
,
1059 .ndo_uninit
= macvlan_uninit
,
1060 .ndo_open
= macvlan_open
,
1061 .ndo_stop
= macvlan_stop
,
1062 .ndo_start_xmit
= macvlan_start_xmit
,
1063 .ndo_change_mtu
= macvlan_change_mtu
,
1064 .ndo_fix_features
= macvlan_fix_features
,
1065 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
1066 .ndo_set_mac_address
= macvlan_set_mac_address
,
1067 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
1068 .ndo_get_stats64
= macvlan_dev_get_stats64
,
1069 .ndo_validate_addr
= eth_validate_addr
,
1070 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
1071 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
1072 .ndo_fdb_add
= macvlan_fdb_add
,
1073 .ndo_fdb_del
= macvlan_fdb_del
,
1074 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
1075 .ndo_get_lock_subclass
= macvlan_get_nest_level
,
1076 #ifdef CONFIG_NET_POLL_CONTROLLER
1077 .ndo_poll_controller
= macvlan_dev_poll_controller
,
1078 .ndo_netpoll_setup
= macvlan_dev_netpoll_setup
,
1079 .ndo_netpoll_cleanup
= macvlan_dev_netpoll_cleanup
,
1081 .ndo_get_iflink
= macvlan_dev_get_iflink
,
1082 .ndo_features_check
= passthru_features_check
,
1085 void macvlan_common_setup(struct net_device
*dev
)
1089 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1090 netif_keep_dst(dev
);
1091 dev
->priv_flags
|= IFF_UNICAST_FLT
;
1092 dev
->netdev_ops
= &macvlan_netdev_ops
;
1093 dev
->destructor
= free_netdev
;
1094 dev
->header_ops
= &macvlan_hard_header_ops
;
1095 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
1097 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
1099 static void macvlan_setup(struct net_device
*dev
)
1101 macvlan_common_setup(dev
);
1102 dev
->priv_flags
|= IFF_NO_QUEUE
;
1105 static int macvlan_port_create(struct net_device
*dev
)
1107 struct macvlan_port
*port
;
1111 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
1114 if (netif_is_ipvlan_port(dev
))
1117 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
1121 port
->passthru
= false;
1123 INIT_LIST_HEAD(&port
->vlans
);
1124 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1125 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
1126 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1127 INIT_HLIST_HEAD(&port
->vlan_source_hash
[i
]);
1129 skb_queue_head_init(&port
->bc_queue
);
1130 INIT_WORK(&port
->bc_work
, macvlan_process_broadcast
);
1132 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
1136 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
1140 static void macvlan_port_destroy(struct net_device
*dev
)
1142 struct macvlan_port
*port
= macvlan_port_get_rtnl(dev
);
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
);
1151 __skb_queue_purge(&port
->bc_queue
);
1153 kfree_rcu(port
, rcu
);
1156 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
1158 if (tb
[IFLA_ADDRESS
]) {
1159 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
1161 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
1162 return -EADDRNOTAVAIL
;
1165 if (data
&& data
[IFLA_MACVLAN_FLAGS
] &&
1166 nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]) & ~MACVLAN_FLAG_NOPROMISC
)
1169 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1170 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
1171 case MACVLAN_MODE_PRIVATE
:
1172 case MACVLAN_MODE_VEPA
:
1173 case MACVLAN_MODE_BRIDGE
:
1174 case MACVLAN_MODE_PASSTHRU
:
1175 case MACVLAN_MODE_SOURCE
:
1182 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1183 switch (nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
])) {
1184 case MACVLAN_MACADDR_ADD
:
1185 case MACVLAN_MACADDR_DEL
:
1186 case MACVLAN_MACADDR_FLUSH
:
1187 case MACVLAN_MACADDR_SET
:
1194 if (data
&& data
[IFLA_MACVLAN_MACADDR
]) {
1195 if (nla_len(data
[IFLA_MACVLAN_MACADDR
]) != ETH_ALEN
)
1198 if (!is_valid_ether_addr(nla_data(data
[IFLA_MACVLAN_MACADDR
])))
1199 return -EADDRNOTAVAIL
;
1202 if (data
&& data
[IFLA_MACVLAN_MACADDR_COUNT
])
1209 * reconfigure list of remote source mac address
1210 * (only for macvlan devices in source mode)
1211 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1212 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1214 static int macvlan_changelink_sources(struct macvlan_dev
*vlan
, u32 mode
,
1215 struct nlattr
*data
[])
1219 struct nlattr
*nla
, *head
;
1220 struct macvlan_source_entry
*entry
;
1222 if (data
[IFLA_MACVLAN_MACADDR
])
1223 addr
= nla_data(data
[IFLA_MACVLAN_MACADDR
]);
1225 if (mode
== MACVLAN_MACADDR_ADD
) {
1229 return macvlan_hash_add_source(vlan
, addr
);
1231 } else if (mode
== MACVLAN_MACADDR_DEL
) {
1235 entry
= macvlan_hash_lookup_source(vlan
, addr
);
1237 macvlan_hash_del_source(entry
);
1238 vlan
->macaddr_count
--;
1240 } else if (mode
== MACVLAN_MACADDR_FLUSH
) {
1241 macvlan_flush_sources(vlan
->port
, vlan
);
1242 } else if (mode
== MACVLAN_MACADDR_SET
) {
1243 macvlan_flush_sources(vlan
->port
, vlan
);
1246 ret
= macvlan_hash_add_source(vlan
, addr
);
1251 if (!data
|| !data
[IFLA_MACVLAN_MACADDR_DATA
])
1254 head
= nla_data(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1255 len
= nla_len(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1257 nla_for_each_attr(nla
, head
, len
, rem
) {
1258 if (nla_type(nla
) != IFLA_MACVLAN_MACADDR
||
1259 nla_len(nla
) != ETH_ALEN
)
1262 addr
= nla_data(nla
);
1263 ret
= macvlan_hash_add_source(vlan
, addr
);
1274 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
1275 struct nlattr
*tb
[], struct nlattr
*data
[])
1277 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1278 struct macvlan_port
*port
;
1279 struct net_device
*lowerdev
;
1282 bool create
= false;
1287 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
1288 if (lowerdev
== NULL
)
1291 /* When creating macvlans or macvtaps on top of other macvlans - use
1292 * the real device as the lowerdev.
1294 if (netif_is_macvlan(lowerdev
))
1295 lowerdev
= macvlan_dev_real_dev(lowerdev
);
1298 dev
->mtu
= lowerdev
->mtu
;
1299 else if (dev
->mtu
> lowerdev
->mtu
)
1302 if (!tb
[IFLA_ADDRESS
])
1303 eth_hw_addr_random(dev
);
1305 if (!macvlan_port_exists(lowerdev
)) {
1306 err
= macvlan_port_create(lowerdev
);
1311 port
= macvlan_port_get_rtnl(lowerdev
);
1313 /* Only 1 macvlan device can be created in passthru mode */
1314 if (port
->passthru
) {
1315 /* The macvlan port must be not created this time,
1316 * still goto destroy_macvlan_port for readability.
1319 goto destroy_macvlan_port
;
1322 vlan
->lowerdev
= lowerdev
;
1325 vlan
->set_features
= MACVLAN_FEATURES
;
1326 vlan
->nest_level
= dev_get_nest_level(lowerdev
) + 1;
1328 vlan
->mode
= MACVLAN_MODE_VEPA
;
1329 if (data
&& data
[IFLA_MACVLAN_MODE
])
1330 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1332 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
1333 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1335 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
1338 goto destroy_macvlan_port
;
1340 port
->passthru
= true;
1341 eth_hw_addr_inherit(dev
, lowerdev
);
1344 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1345 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
) {
1347 goto destroy_macvlan_port
;
1349 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1350 err
= macvlan_changelink_sources(vlan
, macmode
, data
);
1352 goto destroy_macvlan_port
;
1355 err
= register_netdevice(dev
);
1357 goto destroy_macvlan_port
;
1359 dev
->priv_flags
|= IFF_MACVLAN
;
1360 err
= netdev_upper_dev_link(lowerdev
, dev
);
1362 goto unregister_netdev
;
1364 list_add_tail_rcu(&vlan
->list
, &port
->vlans
);
1365 netif_stacked_transfer_operstate(lowerdev
, dev
);
1366 linkwatch_fire_event(dev
);
1371 unregister_netdevice(dev
);
1372 destroy_macvlan_port
:
1374 macvlan_port_destroy(port
->dev
);
1377 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
1379 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
1380 struct nlattr
*tb
[], struct nlattr
*data
[])
1382 return macvlan_common_newlink(src_net
, dev
, tb
, data
);
1385 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
1387 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1389 if (vlan
->mode
== MACVLAN_MODE_SOURCE
)
1390 macvlan_flush_sources(vlan
->port
, vlan
);
1391 list_del_rcu(&vlan
->list
);
1392 unregister_netdevice_queue(dev
, head
);
1393 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
1395 EXPORT_SYMBOL_GPL(macvlan_dellink
);
1397 static int macvlan_changelink(struct net_device
*dev
,
1398 struct nlattr
*tb
[], struct nlattr
*data
[])
1400 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1401 enum macvlan_mode mode
;
1402 bool set_mode
= false;
1403 enum macvlan_macaddr_mode macmode
;
1406 /* Validate mode, but don't set yet: setting flags may fail. */
1407 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1409 mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1410 /* Passthrough mode can't be set or cleared dynamically */
1411 if ((mode
== MACVLAN_MODE_PASSTHRU
) !=
1412 (vlan
->mode
== MACVLAN_MODE_PASSTHRU
))
1414 if (vlan
->mode
== MACVLAN_MODE_SOURCE
&&
1416 macvlan_flush_sources(vlan
->port
, vlan
);
1419 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
1420 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1421 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
1422 if (vlan
->port
->passthru
&& promisc
) {
1425 if (flags
& MACVLAN_FLAG_NOPROMISC
)
1426 err
= dev_set_promiscuity(vlan
->lowerdev
, -1);
1428 err
= dev_set_promiscuity(vlan
->lowerdev
, 1);
1432 vlan
->flags
= flags
;
1436 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1437 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
)
1439 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1440 ret
= macvlan_changelink_sources(vlan
, macmode
, data
);
1447 static size_t macvlan_get_size_mac(const struct macvlan_dev
*vlan
)
1449 if (vlan
->macaddr_count
== 0)
1451 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1452 + vlan
->macaddr_count
* nla_total_size(sizeof(u8
) * ETH_ALEN
);
1455 static size_t macvlan_get_size(const struct net_device
*dev
)
1457 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1460 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1461 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1462 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1463 + macvlan_get_size_mac(vlan
) /* IFLA_MACVLAN_MACADDR */
1467 static int macvlan_fill_info_macaddr(struct sk_buff
*skb
,
1468 const struct macvlan_dev
*vlan
,
1471 struct hlist_head
*h
= &vlan
->port
->vlan_source_hash
[i
];
1472 struct macvlan_source_entry
*entry
;
1474 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
1475 if (entry
->vlan
!= vlan
)
1477 if (nla_put(skb
, IFLA_MACVLAN_MACADDR
, ETH_ALEN
, entry
->addr
))
1483 static int macvlan_fill_info(struct sk_buff
*skb
,
1484 const struct net_device
*dev
)
1486 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1488 struct nlattr
*nest
;
1490 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
1491 goto nla_put_failure
;
1492 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
1493 goto nla_put_failure
;
1494 if (nla_put_u32(skb
, IFLA_MACVLAN_MACADDR_COUNT
, vlan
->macaddr_count
))
1495 goto nla_put_failure
;
1496 if (vlan
->macaddr_count
> 0) {
1497 nest
= nla_nest_start(skb
, IFLA_MACVLAN_MACADDR_DATA
);
1499 goto nla_put_failure
;
1501 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
1502 if (macvlan_fill_info_macaddr(skb
, vlan
, i
))
1503 goto nla_put_failure
;
1505 nla_nest_end(skb
, nest
);
1513 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
1514 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
1515 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
1516 [IFLA_MACVLAN_MACADDR_MODE
] = { .type
= NLA_U32
},
1517 [IFLA_MACVLAN_MACADDR
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1518 [IFLA_MACVLAN_MACADDR_DATA
] = { .type
= NLA_NESTED
},
1519 [IFLA_MACVLAN_MACADDR_COUNT
] = { .type
= NLA_U32
},
1522 int macvlan_link_register(struct rtnl_link_ops
*ops
)
1525 ops
->priv_size
= sizeof(struct macvlan_dev
);
1526 ops
->validate
= macvlan_validate
;
1527 ops
->maxtype
= IFLA_MACVLAN_MAX
;
1528 ops
->policy
= macvlan_policy
;
1529 ops
->changelink
= macvlan_changelink
;
1530 ops
->get_size
= macvlan_get_size
;
1531 ops
->fill_info
= macvlan_fill_info
;
1533 return rtnl_link_register(ops
);
1535 EXPORT_SYMBOL_GPL(macvlan_link_register
);
1537 static struct net
*macvlan_get_link_net(const struct net_device
*dev
)
1539 return dev_net(macvlan_dev_real_dev(dev
));
1542 static struct rtnl_link_ops macvlan_link_ops
= {
1544 .setup
= macvlan_setup
,
1545 .newlink
= macvlan_newlink
,
1546 .dellink
= macvlan_dellink
,
1547 .get_link_net
= macvlan_get_link_net
,
1550 static int macvlan_device_event(struct notifier_block
*unused
,
1551 unsigned long event
, void *ptr
)
1553 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1554 struct macvlan_dev
*vlan
, *next
;
1555 struct macvlan_port
*port
;
1556 LIST_HEAD(list_kill
);
1558 if (!macvlan_port_exists(dev
))
1561 port
= macvlan_port_get_rtnl(dev
);
1566 list_for_each_entry(vlan
, &port
->vlans
, list
)
1567 netif_stacked_transfer_operstate(vlan
->lowerdev
,
1570 case NETDEV_FEAT_CHANGE
:
1571 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1572 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
1573 vlan
->dev
->gso_max_segs
= dev
->gso_max_segs
;
1574 netdev_update_features(vlan
->dev
);
1577 case NETDEV_CHANGEMTU
:
1578 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1579 if (vlan
->dev
->mtu
<= dev
->mtu
)
1581 dev_set_mtu(vlan
->dev
, dev
->mtu
);
1584 case NETDEV_CHANGEADDR
:
1585 if (!port
->passthru
)
1588 vlan
= list_first_entry_or_null(&port
->vlans
,
1592 if (macvlan_sync_address(vlan
->dev
, dev
->dev_addr
))
1596 case NETDEV_UNREGISTER
:
1597 /* twiddle thumbs on netns device moves */
1598 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
1601 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
1602 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
1603 unregister_netdevice_many(&list_kill
);
1605 case NETDEV_PRE_TYPE_CHANGE
:
1606 /* Forbid underlaying device to change its type. */
1609 case NETDEV_NOTIFY_PEERS
:
1610 case NETDEV_BONDING_FAILOVER
:
1611 case NETDEV_RESEND_IGMP
:
1612 /* Propagate to all vlans */
1613 list_for_each_entry(vlan
, &port
->vlans
, list
)
1614 call_netdevice_notifiers(event
, vlan
->dev
);
1619 static struct notifier_block macvlan_notifier_block __read_mostly
= {
1620 .notifier_call
= macvlan_device_event
,
1623 static int __init
macvlan_init_module(void)
1627 register_netdevice_notifier(&macvlan_notifier_block
);
1629 err
= macvlan_link_register(&macvlan_link_ops
);
1634 unregister_netdevice_notifier(&macvlan_notifier_block
);
1638 static void __exit
macvlan_cleanup_module(void)
1640 rtnl_link_unregister(&macvlan_link_ops
);
1641 unregister_netdevice_notifier(&macvlan_notifier_block
);
1644 module_init(macvlan_init_module
);
1645 module_exit(macvlan_cleanup_module
);
1647 MODULE_LICENSE("GPL");
1648 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1649 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1650 MODULE_ALIAS_RTNL_LINK("macvlan");