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_link.h>
30 #include <linux/if_macvlan.h>
31 #include <net/rtnetlink.h>
34 #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
37 struct net_device
*dev
;
38 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
39 struct list_head vlans
;
45 static void macvlan_port_destroy(struct net_device
*dev
);
47 #define macvlan_port_get_rcu(dev) \
48 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
49 #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
50 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
52 static struct macvlan_dev
*macvlan_hash_lookup(const struct macvlan_port
*port
,
53 const unsigned char *addr
)
55 struct macvlan_dev
*vlan
;
58 hlist_for_each_entry_rcu(vlan
, n
, &port
->vlan_hash
[addr
[5]], hlist
) {
59 if (!compare_ether_addr_64bits(vlan
->dev
->dev_addr
, addr
))
65 static void macvlan_hash_add(struct macvlan_dev
*vlan
)
67 struct macvlan_port
*port
= vlan
->port
;
68 const unsigned char *addr
= vlan
->dev
->dev_addr
;
70 hlist_add_head_rcu(&vlan
->hlist
, &port
->vlan_hash
[addr
[5]]);
73 static void macvlan_hash_del(struct macvlan_dev
*vlan
, bool sync
)
75 hlist_del_rcu(&vlan
->hlist
);
80 static void macvlan_hash_change_addr(struct macvlan_dev
*vlan
,
81 const unsigned char *addr
)
83 macvlan_hash_del(vlan
, true);
84 /* Now that we are unhashed it is safe to change the device
85 * address without confusing packet delivery.
87 memcpy(vlan
->dev
->dev_addr
, addr
, ETH_ALEN
);
88 macvlan_hash_add(vlan
);
91 static int macvlan_addr_busy(const struct macvlan_port
*port
,
92 const unsigned char *addr
)
94 /* Test to see if the specified multicast address is
95 * currently in use by the underlying device or
98 if (!compare_ether_addr_64bits(port
->dev
->dev_addr
, addr
))
101 if (macvlan_hash_lookup(port
, addr
))
108 static int macvlan_broadcast_one(struct sk_buff
*skb
,
109 const struct macvlan_dev
*vlan
,
110 const struct ethhdr
*eth
, bool local
)
112 struct net_device
*dev
= vlan
->dev
;
117 return vlan
->forward(dev
, skb
);
120 if (!compare_ether_addr_64bits(eth
->h_dest
,
122 skb
->pkt_type
= PACKET_BROADCAST
;
124 skb
->pkt_type
= PACKET_MULTICAST
;
126 return vlan
->receive(skb
);
129 static void macvlan_broadcast(struct sk_buff
*skb
,
130 const struct macvlan_port
*port
,
131 struct net_device
*src
,
132 enum macvlan_mode mode
)
134 const struct ethhdr
*eth
= eth_hdr(skb
);
135 const struct macvlan_dev
*vlan
;
136 struct hlist_node
*n
;
137 struct sk_buff
*nskb
;
141 if (skb
->protocol
== htons(ETH_P_PAUSE
))
144 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
145 hlist_for_each_entry_rcu(vlan
, n
, &port
->vlan_hash
[i
], hlist
) {
146 if (vlan
->dev
== src
|| !(vlan
->mode
& mode
))
149 nskb
= skb_clone(skb
, GFP_ATOMIC
);
150 err
= macvlan_broadcast_one(nskb
, vlan
, eth
,
151 mode
== MACVLAN_MODE_BRIDGE
);
152 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
153 err
== NET_RX_SUCCESS
, 1);
158 /* called under rcu_read_lock() from netif_receive_skb */
159 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
161 struct macvlan_port
*port
;
162 struct sk_buff
*skb
= *pskb
;
163 const struct ethhdr
*eth
= eth_hdr(skb
);
164 const struct macvlan_dev
*vlan
;
165 const struct macvlan_dev
*src
;
166 struct net_device
*dev
;
167 unsigned int len
= 0;
168 int ret
= NET_RX_DROP
;
170 port
= macvlan_port_get_rcu(skb
->dev
);
171 if (is_multicast_ether_addr(eth
->h_dest
)) {
172 skb
= ip_check_defrag(skb
, IP_DEFRAG_MACVLAN
);
174 return RX_HANDLER_CONSUMED
;
175 src
= macvlan_hash_lookup(port
, eth
->h_source
);
177 /* frame comes from an external address */
178 macvlan_broadcast(skb
, port
, NULL
,
179 MACVLAN_MODE_PRIVATE
|
181 MACVLAN_MODE_PASSTHRU
|
182 MACVLAN_MODE_BRIDGE
);
183 else if (src
->mode
== MACVLAN_MODE_VEPA
)
184 /* flood to everyone except source */
185 macvlan_broadcast(skb
, port
, src
->dev
,
187 MACVLAN_MODE_BRIDGE
);
188 else if (src
->mode
== MACVLAN_MODE_BRIDGE
)
190 * flood only to VEPA ports, bridge ports
191 * already saw the frame on the way out.
193 macvlan_broadcast(skb
, port
, src
->dev
,
195 return RX_HANDLER_PASS
;
199 vlan
= list_first_entry(&port
->vlans
, struct macvlan_dev
, list
);
201 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
203 return RX_HANDLER_PASS
;
206 if (unlikely(!(dev
->flags
& IFF_UP
))) {
208 return RX_HANDLER_CONSUMED
;
210 len
= skb
->len
+ ETH_HLEN
;
211 skb
= skb_share_check(skb
, GFP_ATOMIC
);
216 skb
->pkt_type
= PACKET_HOST
;
218 ret
= vlan
->receive(skb
);
221 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, 0);
222 return RX_HANDLER_CONSUMED
;
225 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
227 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
228 const struct macvlan_port
*port
= vlan
->port
;
229 const struct macvlan_dev
*dest
;
230 __u8 ip_summed
= skb
->ip_summed
;
232 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
233 const struct ethhdr
*eth
= (void *)skb
->data
;
234 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
236 /* send to other bridge ports directly */
237 if (is_multicast_ether_addr(eth
->h_dest
)) {
238 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
242 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
243 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
244 /* send to lowerdev first for its network taps */
245 dev_forward_skb(vlan
->lowerdev
, skb
);
247 return NET_XMIT_SUCCESS
;
252 skb
->ip_summed
= ip_summed
;
253 skb_set_dev(skb
, vlan
->lowerdev
);
254 return dev_queue_xmit(skb
);
257 netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
258 struct net_device
*dev
)
260 unsigned int len
= skb
->len
;
262 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
264 ret
= macvlan_queue_xmit(skb
, dev
);
265 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
266 struct macvlan_pcpu_stats
*pcpu_stats
;
268 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
269 u64_stats_update_begin(&pcpu_stats
->syncp
);
270 pcpu_stats
->tx_packets
++;
271 pcpu_stats
->tx_bytes
+= len
;
272 u64_stats_update_end(&pcpu_stats
->syncp
);
274 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
278 EXPORT_SYMBOL_GPL(macvlan_start_xmit
);
280 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
281 unsigned short type
, const void *daddr
,
282 const void *saddr
, unsigned len
)
284 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
285 struct net_device
*lowerdev
= vlan
->lowerdev
;
287 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
288 saddr
? : dev
->dev_addr
, len
);
291 static const struct header_ops macvlan_hard_header_ops
= {
292 .create
= macvlan_hard_header
,
293 .rebuild
= eth_rebuild_header
,
294 .parse
= eth_header_parse
,
295 .cache
= eth_header_cache
,
296 .cache_update
= eth_header_cache_update
,
299 static int macvlan_open(struct net_device
*dev
)
301 struct macvlan_dev
*vlan
= netdev_priv(dev
);
302 struct net_device
*lowerdev
= vlan
->lowerdev
;
305 if (vlan
->port
->passthru
) {
306 dev_set_promiscuity(lowerdev
, 1);
311 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
314 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
317 if (dev
->flags
& IFF_ALLMULTI
) {
318 err
= dev_set_allmulti(lowerdev
, 1);
324 macvlan_hash_add(vlan
);
328 dev_uc_del(lowerdev
, dev
->dev_addr
);
333 static int macvlan_stop(struct net_device
*dev
)
335 struct macvlan_dev
*vlan
= netdev_priv(dev
);
336 struct net_device
*lowerdev
= vlan
->lowerdev
;
338 if (vlan
->port
->passthru
) {
339 dev_set_promiscuity(lowerdev
, -1);
343 dev_mc_unsync(lowerdev
, dev
);
344 if (dev
->flags
& IFF_ALLMULTI
)
345 dev_set_allmulti(lowerdev
, -1);
347 dev_uc_del(lowerdev
, dev
->dev_addr
);
350 macvlan_hash_del(vlan
, !dev
->dismantle
);
354 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
356 struct macvlan_dev
*vlan
= netdev_priv(dev
);
357 struct net_device
*lowerdev
= vlan
->lowerdev
;
358 struct sockaddr
*addr
= p
;
361 if (!is_valid_ether_addr(addr
->sa_data
))
362 return -EADDRNOTAVAIL
;
364 if (!(dev
->flags
& IFF_UP
)) {
365 /* Just copy in the new address */
366 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
368 /* Rehash and update the device filters */
369 if (macvlan_addr_busy(vlan
->port
, addr
->sa_data
))
372 err
= dev_uc_add(lowerdev
, addr
->sa_data
);
376 dev_uc_del(lowerdev
, dev
->dev_addr
);
378 macvlan_hash_change_addr(vlan
, addr
->sa_data
);
383 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
385 struct macvlan_dev
*vlan
= netdev_priv(dev
);
386 struct net_device
*lowerdev
= vlan
->lowerdev
;
388 if (change
& IFF_ALLMULTI
)
389 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
392 static void macvlan_set_multicast_list(struct net_device
*dev
)
394 struct macvlan_dev
*vlan
= netdev_priv(dev
);
396 dev_mc_sync(vlan
->lowerdev
, dev
);
399 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
401 struct macvlan_dev
*vlan
= netdev_priv(dev
);
403 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
410 * macvlan network devices have devices nesting below it and are a special
411 * "super class" of normal network devices; split their locks off into a
412 * separate class since they always nest.
414 static struct lock_class_key macvlan_netdev_xmit_lock_key
;
415 static struct lock_class_key macvlan_netdev_addr_lock_key
;
417 #define MACVLAN_FEATURES \
418 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
419 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
420 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
421 NETIF_F_HW_VLAN_FILTER)
423 #define MACVLAN_STATE_MASK \
424 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
426 static void macvlan_set_lockdep_class_one(struct net_device
*dev
,
427 struct netdev_queue
*txq
,
430 lockdep_set_class(&txq
->_xmit_lock
,
431 &macvlan_netdev_xmit_lock_key
);
434 static void macvlan_set_lockdep_class(struct net_device
*dev
)
436 lockdep_set_class(&dev
->addr_list_lock
,
437 &macvlan_netdev_addr_lock_key
);
438 netdev_for_each_tx_queue(dev
, macvlan_set_lockdep_class_one
, NULL
);
441 static int macvlan_init(struct net_device
*dev
)
443 struct macvlan_dev
*vlan
= netdev_priv(dev
);
444 const struct net_device
*lowerdev
= vlan
->lowerdev
;
446 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
447 (lowerdev
->state
& MACVLAN_STATE_MASK
);
448 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
449 dev
->features
|= NETIF_F_LLTX
;
450 dev
->gso_max_size
= lowerdev
->gso_max_size
;
451 dev
->iflink
= lowerdev
->ifindex
;
452 dev
->hard_header_len
= lowerdev
->hard_header_len
;
454 macvlan_set_lockdep_class(dev
);
456 vlan
->pcpu_stats
= alloc_percpu(struct macvlan_pcpu_stats
);
457 if (!vlan
->pcpu_stats
)
463 static void macvlan_uninit(struct net_device
*dev
)
465 struct macvlan_dev
*vlan
= netdev_priv(dev
);
466 struct macvlan_port
*port
= vlan
->port
;
468 free_percpu(vlan
->pcpu_stats
);
472 macvlan_port_destroy(port
->dev
);
475 static struct rtnl_link_stats64
*macvlan_dev_get_stats64(struct net_device
*dev
,
476 struct rtnl_link_stats64
*stats
)
478 struct macvlan_dev
*vlan
= netdev_priv(dev
);
480 if (vlan
->pcpu_stats
) {
481 struct macvlan_pcpu_stats
*p
;
482 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
483 u32 rx_errors
= 0, tx_dropped
= 0;
487 for_each_possible_cpu(i
) {
488 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
490 start
= u64_stats_fetch_begin_bh(&p
->syncp
);
491 rx_packets
= p
->rx_packets
;
492 rx_bytes
= p
->rx_bytes
;
493 rx_multicast
= p
->rx_multicast
;
494 tx_packets
= p
->tx_packets
;
495 tx_bytes
= p
->tx_bytes
;
496 } while (u64_stats_fetch_retry_bh(&p
->syncp
, start
));
498 stats
->rx_packets
+= rx_packets
;
499 stats
->rx_bytes
+= rx_bytes
;
500 stats
->multicast
+= rx_multicast
;
501 stats
->tx_packets
+= tx_packets
;
502 stats
->tx_bytes
+= tx_bytes
;
503 /* rx_errors & tx_dropped are u32, updated
504 * without syncp protection.
506 rx_errors
+= p
->rx_errors
;
507 tx_dropped
+= p
->tx_dropped
;
509 stats
->rx_errors
= rx_errors
;
510 stats
->rx_dropped
= rx_errors
;
511 stats
->tx_dropped
= tx_dropped
;
516 static void macvlan_vlan_rx_add_vid(struct net_device
*dev
,
519 struct macvlan_dev
*vlan
= netdev_priv(dev
);
520 struct net_device
*lowerdev
= vlan
->lowerdev
;
521 const struct net_device_ops
*ops
= lowerdev
->netdev_ops
;
523 if (ops
->ndo_vlan_rx_add_vid
)
524 ops
->ndo_vlan_rx_add_vid(lowerdev
, vid
);
527 static void macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
530 struct macvlan_dev
*vlan
= netdev_priv(dev
);
531 struct net_device
*lowerdev
= vlan
->lowerdev
;
532 const struct net_device_ops
*ops
= lowerdev
->netdev_ops
;
534 if (ops
->ndo_vlan_rx_kill_vid
)
535 ops
->ndo_vlan_rx_kill_vid(lowerdev
, vid
);
538 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
539 struct ethtool_drvinfo
*drvinfo
)
541 snprintf(drvinfo
->driver
, 32, "macvlan");
542 snprintf(drvinfo
->version
, 32, "0.1");
545 static int macvlan_ethtool_get_settings(struct net_device
*dev
,
546 struct ethtool_cmd
*cmd
)
548 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
550 return __ethtool_get_settings(vlan
->lowerdev
, cmd
);
553 static const struct ethtool_ops macvlan_ethtool_ops
= {
554 .get_link
= ethtool_op_get_link
,
555 .get_settings
= macvlan_ethtool_get_settings
,
556 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
559 static const struct net_device_ops macvlan_netdev_ops
= {
560 .ndo_init
= macvlan_init
,
561 .ndo_uninit
= macvlan_uninit
,
562 .ndo_open
= macvlan_open
,
563 .ndo_stop
= macvlan_stop
,
564 .ndo_start_xmit
= macvlan_start_xmit
,
565 .ndo_change_mtu
= macvlan_change_mtu
,
566 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
567 .ndo_set_mac_address
= macvlan_set_mac_address
,
568 .ndo_set_rx_mode
= macvlan_set_multicast_list
,
569 .ndo_get_stats64
= macvlan_dev_get_stats64
,
570 .ndo_validate_addr
= eth_validate_addr
,
571 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
572 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
575 void macvlan_common_setup(struct net_device
*dev
)
579 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
580 dev
->netdev_ops
= &macvlan_netdev_ops
;
581 dev
->destructor
= free_netdev
;
582 dev
->header_ops
= &macvlan_hard_header_ops
,
583 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
585 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
587 static void macvlan_setup(struct net_device
*dev
)
589 macvlan_common_setup(dev
);
590 dev
->tx_queue_len
= 0;
593 static int macvlan_port_create(struct net_device
*dev
)
595 struct macvlan_port
*port
;
599 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
602 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
606 port
->passthru
= false;
608 INIT_LIST_HEAD(&port
->vlans
);
609 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
610 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
612 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
616 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
620 static void macvlan_port_destroy(struct net_device
*dev
)
622 struct macvlan_port
*port
= macvlan_port_get(dev
);
624 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
625 netdev_rx_handler_unregister(dev
);
626 kfree_rcu(port
, rcu
);
629 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
631 if (tb
[IFLA_ADDRESS
]) {
632 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
634 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
635 return -EADDRNOTAVAIL
;
638 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
639 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
640 case MACVLAN_MODE_PRIVATE
:
641 case MACVLAN_MODE_VEPA
:
642 case MACVLAN_MODE_BRIDGE
:
643 case MACVLAN_MODE_PASSTHRU
:
652 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
653 struct nlattr
*tb
[], struct nlattr
*data
[],
654 int (*receive
)(struct sk_buff
*skb
),
655 int (*forward
)(struct net_device
*dev
,
656 struct sk_buff
*skb
))
658 struct macvlan_dev
*vlan
= netdev_priv(dev
);
659 struct macvlan_port
*port
;
660 struct net_device
*lowerdev
;
666 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
667 if (lowerdev
== NULL
)
670 /* When creating macvlans on top of other macvlans - use
671 * the real device as the lowerdev.
673 if (lowerdev
->rtnl_link_ops
== dev
->rtnl_link_ops
) {
674 struct macvlan_dev
*lowervlan
= netdev_priv(lowerdev
);
675 lowerdev
= lowervlan
->lowerdev
;
679 dev
->mtu
= lowerdev
->mtu
;
680 else if (dev
->mtu
> lowerdev
->mtu
)
683 if (!tb
[IFLA_ADDRESS
])
684 random_ether_addr(dev
->dev_addr
);
686 if (!macvlan_port_exists(lowerdev
)) {
687 err
= macvlan_port_create(lowerdev
);
691 port
= macvlan_port_get(lowerdev
);
693 /* Only 1 macvlan device can be created in passthru mode */
697 vlan
->lowerdev
= lowerdev
;
700 vlan
->receive
= receive
;
701 vlan
->forward
= forward
;
703 vlan
->mode
= MACVLAN_MODE_VEPA
;
704 if (data
&& data
[IFLA_MACVLAN_MODE
])
705 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
707 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
710 port
->passthru
= true;
711 memcpy(dev
->dev_addr
, lowerdev
->dev_addr
, ETH_ALEN
);
715 err
= register_netdevice(dev
);
719 list_add_tail(&vlan
->list
, &port
->vlans
);
720 netif_stacked_transfer_operstate(lowerdev
, dev
);
727 macvlan_port_destroy(lowerdev
);
731 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
733 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
734 struct nlattr
*tb
[], struct nlattr
*data
[])
736 return macvlan_common_newlink(src_net
, dev
, tb
, data
,
741 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
743 struct macvlan_dev
*vlan
= netdev_priv(dev
);
745 list_del(&vlan
->list
);
746 unregister_netdevice_queue(dev
, head
);
748 EXPORT_SYMBOL_GPL(macvlan_dellink
);
750 static int macvlan_changelink(struct net_device
*dev
,
751 struct nlattr
*tb
[], struct nlattr
*data
[])
753 struct macvlan_dev
*vlan
= netdev_priv(dev
);
754 if (data
&& data
[IFLA_MACVLAN_MODE
])
755 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
759 static size_t macvlan_get_size(const struct net_device
*dev
)
761 return nla_total_size(4);
764 static int macvlan_fill_info(struct sk_buff
*skb
,
765 const struct net_device
*dev
)
767 struct macvlan_dev
*vlan
= netdev_priv(dev
);
769 NLA_PUT_U32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
);
776 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
777 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
780 int macvlan_link_register(struct rtnl_link_ops
*ops
)
783 ops
->priv_size
= sizeof(struct macvlan_dev
);
784 ops
->validate
= macvlan_validate
;
785 ops
->maxtype
= IFLA_MACVLAN_MAX
;
786 ops
->policy
= macvlan_policy
;
787 ops
->changelink
= macvlan_changelink
;
788 ops
->get_size
= macvlan_get_size
;
789 ops
->fill_info
= macvlan_fill_info
;
791 return rtnl_link_register(ops
);
793 EXPORT_SYMBOL_GPL(macvlan_link_register
);
795 static struct rtnl_link_ops macvlan_link_ops
= {
797 .setup
= macvlan_setup
,
798 .newlink
= macvlan_newlink
,
799 .dellink
= macvlan_dellink
,
802 static int macvlan_device_event(struct notifier_block
*unused
,
803 unsigned long event
, void *ptr
)
805 struct net_device
*dev
= ptr
;
806 struct macvlan_dev
*vlan
, *next
;
807 struct macvlan_port
*port
;
808 LIST_HEAD(list_kill
);
810 if (!macvlan_port_exists(dev
))
813 port
= macvlan_port_get(dev
);
817 list_for_each_entry(vlan
, &port
->vlans
, list
)
818 netif_stacked_transfer_operstate(vlan
->lowerdev
,
821 case NETDEV_FEAT_CHANGE
:
822 list_for_each_entry(vlan
, &port
->vlans
, list
) {
823 vlan
->dev
->features
= dev
->features
& MACVLAN_FEATURES
;
824 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
825 netdev_features_change(vlan
->dev
);
828 case NETDEV_UNREGISTER
:
829 /* twiddle thumbs on netns device moves */
830 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
833 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
834 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
835 unregister_netdevice_many(&list_kill
);
836 list_del(&list_kill
);
838 case NETDEV_PRE_TYPE_CHANGE
:
839 /* Forbid underlaying device to change its type. */
845 static struct notifier_block macvlan_notifier_block __read_mostly
= {
846 .notifier_call
= macvlan_device_event
,
849 static int __init
macvlan_init_module(void)
853 register_netdevice_notifier(&macvlan_notifier_block
);
855 err
= macvlan_link_register(&macvlan_link_ops
);
860 unregister_netdevice_notifier(&macvlan_notifier_block
);
864 static void __exit
macvlan_cleanup_module(void)
866 rtnl_link_unregister(&macvlan_link_ops
);
867 unregister_netdevice_notifier(&macvlan_notifier_block
);
870 module_init(macvlan_init_module
);
871 module_exit(macvlan_cleanup_module
);
873 MODULE_LICENSE("GPL");
874 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
875 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
876 MODULE_ALIAS_RTNL_LINK("macvlan");