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 <net/rtnetlink.h>
35 #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
38 struct net_device
*dev
;
39 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
40 struct list_head vlans
;
46 static void macvlan_port_destroy(struct net_device
*dev
);
48 #define macvlan_port_get_rcu(dev) \
49 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
50 #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
51 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
53 static struct macvlan_dev
*macvlan_hash_lookup(const struct macvlan_port
*port
,
54 const unsigned char *addr
)
56 struct macvlan_dev
*vlan
;
59 hlist_for_each_entry_rcu(vlan
, n
, &port
->vlan_hash
[addr
[5]], hlist
) {
60 if (!compare_ether_addr_64bits(vlan
->dev
->dev_addr
, addr
))
66 static void macvlan_hash_add(struct macvlan_dev
*vlan
)
68 struct macvlan_port
*port
= vlan
->port
;
69 const unsigned char *addr
= vlan
->dev
->dev_addr
;
71 hlist_add_head_rcu(&vlan
->hlist
, &port
->vlan_hash
[addr
[5]]);
74 static void macvlan_hash_del(struct macvlan_dev
*vlan
, bool sync
)
76 hlist_del_rcu(&vlan
->hlist
);
81 static void macvlan_hash_change_addr(struct macvlan_dev
*vlan
,
82 const unsigned char *addr
)
84 macvlan_hash_del(vlan
, true);
85 /* Now that we are unhashed it is safe to change the device
86 * address without confusing packet delivery.
88 memcpy(vlan
->dev
->dev_addr
, addr
, ETH_ALEN
);
89 macvlan_hash_add(vlan
);
92 static int macvlan_addr_busy(const struct macvlan_port
*port
,
93 const unsigned char *addr
)
95 /* Test to see if the specified multicast address is
96 * currently in use by the underlying device or
99 if (!compare_ether_addr_64bits(port
->dev
->dev_addr
, addr
))
102 if (macvlan_hash_lookup(port
, addr
))
109 static int macvlan_broadcast_one(struct sk_buff
*skb
,
110 const struct macvlan_dev
*vlan
,
111 const struct ethhdr
*eth
, bool local
)
113 struct net_device
*dev
= vlan
->dev
;
118 return vlan
->forward(dev
, skb
);
121 if (!compare_ether_addr_64bits(eth
->h_dest
,
123 skb
->pkt_type
= PACKET_BROADCAST
;
125 skb
->pkt_type
= PACKET_MULTICAST
;
127 return vlan
->receive(skb
);
130 static void macvlan_broadcast(struct sk_buff
*skb
,
131 const struct macvlan_port
*port
,
132 struct net_device
*src
,
133 enum macvlan_mode mode
)
135 const struct ethhdr
*eth
= eth_hdr(skb
);
136 const struct macvlan_dev
*vlan
;
137 struct hlist_node
*n
;
138 struct sk_buff
*nskb
;
142 if (skb
->protocol
== htons(ETH_P_PAUSE
))
145 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
146 hlist_for_each_entry_rcu(vlan
, n
, &port
->vlan_hash
[i
], hlist
) {
147 if (vlan
->dev
== src
|| !(vlan
->mode
& mode
))
150 nskb
= skb_clone(skb
, GFP_ATOMIC
);
151 err
= macvlan_broadcast_one(nskb
, vlan
, eth
,
152 mode
== MACVLAN_MODE_BRIDGE
);
153 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
154 err
== NET_RX_SUCCESS
, 1);
159 /* called under rcu_read_lock() from netif_receive_skb */
160 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
162 struct macvlan_port
*port
;
163 struct sk_buff
*skb
= *pskb
;
164 const struct ethhdr
*eth
= eth_hdr(skb
);
165 const struct macvlan_dev
*vlan
;
166 const struct macvlan_dev
*src
;
167 struct net_device
*dev
;
168 unsigned int len
= 0;
169 int ret
= NET_RX_DROP
;
171 port
= macvlan_port_get_rcu(skb
->dev
);
172 if (is_multicast_ether_addr(eth
->h_dest
)) {
173 skb
= ip_check_defrag(skb
, IP_DEFRAG_MACVLAN
);
175 return RX_HANDLER_CONSUMED
;
177 src
= macvlan_hash_lookup(port
, eth
->h_source
);
179 /* frame comes from an external address */
180 macvlan_broadcast(skb
, port
, NULL
,
181 MACVLAN_MODE_PRIVATE
|
183 MACVLAN_MODE_PASSTHRU
|
184 MACVLAN_MODE_BRIDGE
);
185 else if (src
->mode
== MACVLAN_MODE_VEPA
)
186 /* flood to everyone except source */
187 macvlan_broadcast(skb
, port
, src
->dev
,
189 MACVLAN_MODE_BRIDGE
);
190 else if (src
->mode
== MACVLAN_MODE_BRIDGE
)
192 * flood only to VEPA ports, bridge ports
193 * already saw the frame on the way out.
195 macvlan_broadcast(skb
, port
, src
->dev
,
198 /* forward to original port. */
200 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0);
204 return RX_HANDLER_PASS
;
208 vlan
= list_first_entry(&port
->vlans
, struct macvlan_dev
, list
);
210 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
212 return RX_HANDLER_PASS
;
215 if (unlikely(!(dev
->flags
& IFF_UP
))) {
217 return RX_HANDLER_CONSUMED
;
219 len
= skb
->len
+ ETH_HLEN
;
220 skb
= skb_share_check(skb
, GFP_ATOMIC
);
225 skb
->pkt_type
= PACKET_HOST
;
227 ret
= vlan
->receive(skb
);
230 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, 0);
231 return RX_HANDLER_CONSUMED
;
234 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
236 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
237 const struct macvlan_port
*port
= vlan
->port
;
238 const struct macvlan_dev
*dest
;
239 __u8 ip_summed
= skb
->ip_summed
;
241 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
242 const struct ethhdr
*eth
= (void *)skb
->data
;
243 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
245 /* send to other bridge ports directly */
246 if (is_multicast_ether_addr(eth
->h_dest
)) {
247 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
251 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
252 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
253 /* send to lowerdev first for its network taps */
254 dev_forward_skb(vlan
->lowerdev
, skb
);
256 return NET_XMIT_SUCCESS
;
261 skb
->ip_summed
= ip_summed
;
262 skb_set_dev(skb
, vlan
->lowerdev
);
263 return dev_queue_xmit(skb
);
266 netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
267 struct net_device
*dev
)
269 unsigned int len
= skb
->len
;
271 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
273 ret
= macvlan_queue_xmit(skb
, dev
);
274 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
275 struct macvlan_pcpu_stats
*pcpu_stats
;
277 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
278 u64_stats_update_begin(&pcpu_stats
->syncp
);
279 pcpu_stats
->tx_packets
++;
280 pcpu_stats
->tx_bytes
+= len
;
281 u64_stats_update_end(&pcpu_stats
->syncp
);
283 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
287 EXPORT_SYMBOL_GPL(macvlan_start_xmit
);
289 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
290 unsigned short type
, const void *daddr
,
291 const void *saddr
, unsigned len
)
293 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
294 struct net_device
*lowerdev
= vlan
->lowerdev
;
296 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
297 saddr
? : dev
->dev_addr
, len
);
300 static const struct header_ops macvlan_hard_header_ops
= {
301 .create
= macvlan_hard_header
,
302 .rebuild
= eth_rebuild_header
,
303 .parse
= eth_header_parse
,
304 .cache
= eth_header_cache
,
305 .cache_update
= eth_header_cache_update
,
308 static int macvlan_open(struct net_device
*dev
)
310 struct macvlan_dev
*vlan
= netdev_priv(dev
);
311 struct net_device
*lowerdev
= vlan
->lowerdev
;
314 if (vlan
->port
->passthru
) {
315 dev_set_promiscuity(lowerdev
, 1);
320 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
323 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
326 if (dev
->flags
& IFF_ALLMULTI
) {
327 err
= dev_set_allmulti(lowerdev
, 1);
333 macvlan_hash_add(vlan
);
337 dev_uc_del(lowerdev
, dev
->dev_addr
);
342 static int macvlan_stop(struct net_device
*dev
)
344 struct macvlan_dev
*vlan
= netdev_priv(dev
);
345 struct net_device
*lowerdev
= vlan
->lowerdev
;
347 if (vlan
->port
->passthru
) {
348 dev_set_promiscuity(lowerdev
, -1);
352 dev_mc_unsync(lowerdev
, dev
);
353 if (dev
->flags
& IFF_ALLMULTI
)
354 dev_set_allmulti(lowerdev
, -1);
356 dev_uc_del(lowerdev
, dev
->dev_addr
);
359 macvlan_hash_del(vlan
, !dev
->dismantle
);
363 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
365 struct macvlan_dev
*vlan
= netdev_priv(dev
);
366 struct net_device
*lowerdev
= vlan
->lowerdev
;
367 struct sockaddr
*addr
= p
;
370 if (!is_valid_ether_addr(addr
->sa_data
))
371 return -EADDRNOTAVAIL
;
373 if (!(dev
->flags
& IFF_UP
)) {
374 /* Just copy in the new address */
375 dev
->addr_assign_type
&= ~NET_ADDR_RANDOM
;
376 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
378 /* Rehash and update the device filters */
379 if (macvlan_addr_busy(vlan
->port
, addr
->sa_data
))
382 err
= dev_uc_add(lowerdev
, addr
->sa_data
);
386 dev_uc_del(lowerdev
, dev
->dev_addr
);
388 macvlan_hash_change_addr(vlan
, addr
->sa_data
);
393 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
395 struct macvlan_dev
*vlan
= netdev_priv(dev
);
396 struct net_device
*lowerdev
= vlan
->lowerdev
;
398 if (change
& IFF_ALLMULTI
)
399 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
402 static void macvlan_set_multicast_list(struct net_device
*dev
)
404 struct macvlan_dev
*vlan
= netdev_priv(dev
);
406 dev_mc_sync(vlan
->lowerdev
, dev
);
409 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
411 struct macvlan_dev
*vlan
= netdev_priv(dev
);
413 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
420 * macvlan network devices have devices nesting below it and are a special
421 * "super class" of normal network devices; split their locks off into a
422 * separate class since they always nest.
424 static struct lock_class_key macvlan_netdev_xmit_lock_key
;
425 static struct lock_class_key macvlan_netdev_addr_lock_key
;
427 #define MACVLAN_FEATURES \
428 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
429 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
430 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
431 NETIF_F_HW_VLAN_FILTER)
433 #define MACVLAN_STATE_MASK \
434 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
436 static void macvlan_set_lockdep_class_one(struct net_device
*dev
,
437 struct netdev_queue
*txq
,
440 lockdep_set_class(&txq
->_xmit_lock
,
441 &macvlan_netdev_xmit_lock_key
);
444 static void macvlan_set_lockdep_class(struct net_device
*dev
)
446 lockdep_set_class(&dev
->addr_list_lock
,
447 &macvlan_netdev_addr_lock_key
);
448 netdev_for_each_tx_queue(dev
, macvlan_set_lockdep_class_one
, NULL
);
451 static int macvlan_init(struct net_device
*dev
)
453 struct macvlan_dev
*vlan
= netdev_priv(dev
);
454 const struct net_device
*lowerdev
= vlan
->lowerdev
;
456 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
457 (lowerdev
->state
& MACVLAN_STATE_MASK
);
458 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
459 dev
->features
|= NETIF_F_LLTX
;
460 dev
->gso_max_size
= lowerdev
->gso_max_size
;
461 dev
->iflink
= lowerdev
->ifindex
;
462 dev
->hard_header_len
= lowerdev
->hard_header_len
;
464 macvlan_set_lockdep_class(dev
);
466 vlan
->pcpu_stats
= alloc_percpu(struct macvlan_pcpu_stats
);
467 if (!vlan
->pcpu_stats
)
473 static void macvlan_uninit(struct net_device
*dev
)
475 struct macvlan_dev
*vlan
= netdev_priv(dev
);
476 struct macvlan_port
*port
= vlan
->port
;
478 free_percpu(vlan
->pcpu_stats
);
482 macvlan_port_destroy(port
->dev
);
485 static struct rtnl_link_stats64
*macvlan_dev_get_stats64(struct net_device
*dev
,
486 struct rtnl_link_stats64
*stats
)
488 struct macvlan_dev
*vlan
= netdev_priv(dev
);
490 if (vlan
->pcpu_stats
) {
491 struct macvlan_pcpu_stats
*p
;
492 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
493 u32 rx_errors
= 0, tx_dropped
= 0;
497 for_each_possible_cpu(i
) {
498 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
500 start
= u64_stats_fetch_begin_bh(&p
->syncp
);
501 rx_packets
= p
->rx_packets
;
502 rx_bytes
= p
->rx_bytes
;
503 rx_multicast
= p
->rx_multicast
;
504 tx_packets
= p
->tx_packets
;
505 tx_bytes
= p
->tx_bytes
;
506 } while (u64_stats_fetch_retry_bh(&p
->syncp
, start
));
508 stats
->rx_packets
+= rx_packets
;
509 stats
->rx_bytes
+= rx_bytes
;
510 stats
->multicast
+= rx_multicast
;
511 stats
->tx_packets
+= tx_packets
;
512 stats
->tx_bytes
+= tx_bytes
;
513 /* rx_errors & tx_dropped are u32, updated
514 * without syncp protection.
516 rx_errors
+= p
->rx_errors
;
517 tx_dropped
+= p
->tx_dropped
;
519 stats
->rx_errors
= rx_errors
;
520 stats
->rx_dropped
= rx_errors
;
521 stats
->tx_dropped
= tx_dropped
;
526 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
529 struct macvlan_dev
*vlan
= netdev_priv(dev
);
530 struct net_device
*lowerdev
= vlan
->lowerdev
;
532 return vlan_vid_add(lowerdev
, vid
);
535 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
538 struct macvlan_dev
*vlan
= netdev_priv(dev
);
539 struct net_device
*lowerdev
= vlan
->lowerdev
;
541 vlan_vid_del(lowerdev
, vid
);
545 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
546 struct ethtool_drvinfo
*drvinfo
)
548 snprintf(drvinfo
->driver
, 32, "macvlan");
549 snprintf(drvinfo
->version
, 32, "0.1");
552 static int macvlan_ethtool_get_settings(struct net_device
*dev
,
553 struct ethtool_cmd
*cmd
)
555 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
557 return __ethtool_get_settings(vlan
->lowerdev
, cmd
);
560 static const struct ethtool_ops macvlan_ethtool_ops
= {
561 .get_link
= ethtool_op_get_link
,
562 .get_settings
= macvlan_ethtool_get_settings
,
563 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
566 static const struct net_device_ops macvlan_netdev_ops
= {
567 .ndo_init
= macvlan_init
,
568 .ndo_uninit
= macvlan_uninit
,
569 .ndo_open
= macvlan_open
,
570 .ndo_stop
= macvlan_stop
,
571 .ndo_start_xmit
= macvlan_start_xmit
,
572 .ndo_change_mtu
= macvlan_change_mtu
,
573 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
574 .ndo_set_mac_address
= macvlan_set_mac_address
,
575 .ndo_set_rx_mode
= macvlan_set_multicast_list
,
576 .ndo_get_stats64
= macvlan_dev_get_stats64
,
577 .ndo_validate_addr
= eth_validate_addr
,
578 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
579 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
582 void macvlan_common_setup(struct net_device
*dev
)
586 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
587 dev
->netdev_ops
= &macvlan_netdev_ops
;
588 dev
->destructor
= free_netdev
;
589 dev
->header_ops
= &macvlan_hard_header_ops
,
590 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
592 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
594 static void macvlan_setup(struct net_device
*dev
)
596 macvlan_common_setup(dev
);
597 dev
->tx_queue_len
= 0;
600 static int macvlan_port_create(struct net_device
*dev
)
602 struct macvlan_port
*port
;
606 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
609 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
613 port
->passthru
= false;
615 INIT_LIST_HEAD(&port
->vlans
);
616 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
617 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
619 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
623 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
627 static void macvlan_port_destroy(struct net_device
*dev
)
629 struct macvlan_port
*port
= macvlan_port_get(dev
);
631 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
632 netdev_rx_handler_unregister(dev
);
633 kfree_rcu(port
, rcu
);
636 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
638 if (tb
[IFLA_ADDRESS
]) {
639 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
641 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
642 return -EADDRNOTAVAIL
;
645 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
646 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
647 case MACVLAN_MODE_PRIVATE
:
648 case MACVLAN_MODE_VEPA
:
649 case MACVLAN_MODE_BRIDGE
:
650 case MACVLAN_MODE_PASSTHRU
:
659 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
660 struct nlattr
*tb
[], struct nlattr
*data
[],
661 int (*receive
)(struct sk_buff
*skb
),
662 int (*forward
)(struct net_device
*dev
,
663 struct sk_buff
*skb
))
665 struct macvlan_dev
*vlan
= netdev_priv(dev
);
666 struct macvlan_port
*port
;
667 struct net_device
*lowerdev
;
673 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
674 if (lowerdev
== NULL
)
677 /* When creating macvlans on top of other macvlans - use
678 * the real device as the lowerdev.
680 if (lowerdev
->rtnl_link_ops
== dev
->rtnl_link_ops
) {
681 struct macvlan_dev
*lowervlan
= netdev_priv(lowerdev
);
682 lowerdev
= lowervlan
->lowerdev
;
686 dev
->mtu
= lowerdev
->mtu
;
687 else if (dev
->mtu
> lowerdev
->mtu
)
690 if (!tb
[IFLA_ADDRESS
])
691 eth_hw_addr_random(dev
);
693 if (!macvlan_port_exists(lowerdev
)) {
694 err
= macvlan_port_create(lowerdev
);
698 port
= macvlan_port_get(lowerdev
);
700 /* Only 1 macvlan device can be created in passthru mode */
704 vlan
->lowerdev
= lowerdev
;
707 vlan
->receive
= receive
;
708 vlan
->forward
= forward
;
710 vlan
->mode
= MACVLAN_MODE_VEPA
;
711 if (data
&& data
[IFLA_MACVLAN_MODE
])
712 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
714 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
717 port
->passthru
= true;
718 memcpy(dev
->dev_addr
, lowerdev
->dev_addr
, ETH_ALEN
);
722 err
= register_netdevice(dev
);
726 list_add_tail(&vlan
->list
, &port
->vlans
);
727 netif_stacked_transfer_operstate(lowerdev
, dev
);
734 macvlan_port_destroy(lowerdev
);
738 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
740 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
741 struct nlattr
*tb
[], struct nlattr
*data
[])
743 return macvlan_common_newlink(src_net
, dev
, tb
, data
,
748 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
750 struct macvlan_dev
*vlan
= netdev_priv(dev
);
752 list_del(&vlan
->list
);
753 unregister_netdevice_queue(dev
, head
);
755 EXPORT_SYMBOL_GPL(macvlan_dellink
);
757 static int macvlan_changelink(struct net_device
*dev
,
758 struct nlattr
*tb
[], struct nlattr
*data
[])
760 struct macvlan_dev
*vlan
= netdev_priv(dev
);
761 if (data
&& data
[IFLA_MACVLAN_MODE
])
762 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
766 static size_t macvlan_get_size(const struct net_device
*dev
)
768 return nla_total_size(4);
771 static int macvlan_fill_info(struct sk_buff
*skb
,
772 const struct net_device
*dev
)
774 struct macvlan_dev
*vlan
= netdev_priv(dev
);
776 NLA_PUT_U32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
);
783 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
784 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
787 int macvlan_link_register(struct rtnl_link_ops
*ops
)
790 ops
->priv_size
= sizeof(struct macvlan_dev
);
791 ops
->validate
= macvlan_validate
;
792 ops
->maxtype
= IFLA_MACVLAN_MAX
;
793 ops
->policy
= macvlan_policy
;
794 ops
->changelink
= macvlan_changelink
;
795 ops
->get_size
= macvlan_get_size
;
796 ops
->fill_info
= macvlan_fill_info
;
798 return rtnl_link_register(ops
);
800 EXPORT_SYMBOL_GPL(macvlan_link_register
);
802 static struct rtnl_link_ops macvlan_link_ops
= {
804 .setup
= macvlan_setup
,
805 .newlink
= macvlan_newlink
,
806 .dellink
= macvlan_dellink
,
809 static int macvlan_device_event(struct notifier_block
*unused
,
810 unsigned long event
, void *ptr
)
812 struct net_device
*dev
= ptr
;
813 struct macvlan_dev
*vlan
, *next
;
814 struct macvlan_port
*port
;
815 LIST_HEAD(list_kill
);
817 if (!macvlan_port_exists(dev
))
820 port
= macvlan_port_get(dev
);
824 list_for_each_entry(vlan
, &port
->vlans
, list
)
825 netif_stacked_transfer_operstate(vlan
->lowerdev
,
828 case NETDEV_FEAT_CHANGE
:
829 list_for_each_entry(vlan
, &port
->vlans
, list
) {
830 vlan
->dev
->features
= dev
->features
& MACVLAN_FEATURES
;
831 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
832 netdev_features_change(vlan
->dev
);
835 case NETDEV_UNREGISTER
:
836 /* twiddle thumbs on netns device moves */
837 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
840 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
841 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
842 unregister_netdevice_many(&list_kill
);
843 list_del(&list_kill
);
845 case NETDEV_PRE_TYPE_CHANGE
:
846 /* Forbid underlaying device to change its type. */
852 static struct notifier_block macvlan_notifier_block __read_mostly
= {
853 .notifier_call
= macvlan_device_event
,
856 static int __init
macvlan_init_module(void)
860 register_netdevice_notifier(&macvlan_notifier_block
);
862 err
= macvlan_link_register(&macvlan_link_ops
);
867 unregister_netdevice_notifier(&macvlan_notifier_block
);
871 static void __exit
macvlan_cleanup_module(void)
873 rtnl_link_unregister(&macvlan_link_ops
);
874 unregister_netdevice_notifier(&macvlan_notifier_block
);
877 module_init(macvlan_init_module
);
878 module_exit(macvlan_cleanup_module
);
880 MODULE_LICENSE("GPL");
881 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
882 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
883 MODULE_ALIAS_RTNL_LINK("macvlan");