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 src
= macvlan_hash_lookup(port
, eth
->h_source
);
174 /* frame comes from an external address */
175 macvlan_broadcast(skb
, port
, NULL
,
176 MACVLAN_MODE_PRIVATE
|
178 MACVLAN_MODE_PASSTHRU
|
179 MACVLAN_MODE_BRIDGE
);
180 else if (src
->mode
== MACVLAN_MODE_VEPA
)
181 /* flood to everyone except source */
182 macvlan_broadcast(skb
, port
, src
->dev
,
184 MACVLAN_MODE_BRIDGE
);
185 else if (src
->mode
== MACVLAN_MODE_BRIDGE
)
187 * flood only to VEPA ports, bridge ports
188 * already saw the frame on the way out.
190 macvlan_broadcast(skb
, port
, src
->dev
,
192 return RX_HANDLER_PASS
;
196 vlan
= list_first_entry(&port
->vlans
, struct macvlan_dev
, list
);
198 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
200 return RX_HANDLER_PASS
;
203 if (unlikely(!(dev
->flags
& IFF_UP
))) {
205 return RX_HANDLER_CONSUMED
;
207 len
= skb
->len
+ ETH_HLEN
;
208 skb
= skb_share_check(skb
, GFP_ATOMIC
);
213 skb
->pkt_type
= PACKET_HOST
;
215 ret
= vlan
->receive(skb
);
218 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, 0);
219 return RX_HANDLER_CONSUMED
;
222 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
224 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
225 const struct macvlan_port
*port
= vlan
->port
;
226 const struct macvlan_dev
*dest
;
227 __u8 ip_summed
= skb
->ip_summed
;
229 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
230 const struct ethhdr
*eth
= (void *)skb
->data
;
231 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
233 /* send to other bridge ports directly */
234 if (is_multicast_ether_addr(eth
->h_dest
)) {
235 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
239 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
240 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
241 unsigned int length
= skb
->len
+ ETH_HLEN
;
242 int ret
= dest
->forward(dest
->dev
, skb
);
243 macvlan_count_rx(dest
, length
,
244 ret
== NET_RX_SUCCESS
, 0);
246 return NET_XMIT_SUCCESS
;
251 skb
->ip_summed
= ip_summed
;
252 skb_set_dev(skb
, vlan
->lowerdev
);
253 return dev_queue_xmit(skb
);
256 netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
257 struct net_device
*dev
)
259 unsigned int len
= skb
->len
;
261 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
263 ret
= macvlan_queue_xmit(skb
, dev
);
264 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
265 struct macvlan_pcpu_stats
*pcpu_stats
;
267 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
268 u64_stats_update_begin(&pcpu_stats
->syncp
);
269 pcpu_stats
->tx_packets
++;
270 pcpu_stats
->tx_bytes
+= len
;
271 u64_stats_update_end(&pcpu_stats
->syncp
);
273 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
277 EXPORT_SYMBOL_GPL(macvlan_start_xmit
);
279 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
280 unsigned short type
, const void *daddr
,
281 const void *saddr
, unsigned len
)
283 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
284 struct net_device
*lowerdev
= vlan
->lowerdev
;
286 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
287 saddr
? : dev
->dev_addr
, len
);
290 static const struct header_ops macvlan_hard_header_ops
= {
291 .create
= macvlan_hard_header
,
292 .rebuild
= eth_rebuild_header
,
293 .parse
= eth_header_parse
,
294 .cache
= eth_header_cache
,
295 .cache_update
= eth_header_cache_update
,
298 static int macvlan_open(struct net_device
*dev
)
300 struct macvlan_dev
*vlan
= netdev_priv(dev
);
301 struct net_device
*lowerdev
= vlan
->lowerdev
;
304 if (vlan
->port
->passthru
) {
305 dev_set_promiscuity(lowerdev
, 1);
310 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
313 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
316 if (dev
->flags
& IFF_ALLMULTI
) {
317 err
= dev_set_allmulti(lowerdev
, 1);
323 macvlan_hash_add(vlan
);
327 dev_uc_del(lowerdev
, dev
->dev_addr
);
332 static int macvlan_stop(struct net_device
*dev
)
334 struct macvlan_dev
*vlan
= netdev_priv(dev
);
335 struct net_device
*lowerdev
= vlan
->lowerdev
;
337 if (vlan
->port
->passthru
) {
338 dev_set_promiscuity(lowerdev
, -1);
342 dev_mc_unsync(lowerdev
, dev
);
343 if (dev
->flags
& IFF_ALLMULTI
)
344 dev_set_allmulti(lowerdev
, -1);
346 dev_uc_del(lowerdev
, dev
->dev_addr
);
349 macvlan_hash_del(vlan
, !dev
->dismantle
);
353 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
355 struct macvlan_dev
*vlan
= netdev_priv(dev
);
356 struct net_device
*lowerdev
= vlan
->lowerdev
;
357 struct sockaddr
*addr
= p
;
360 if (!is_valid_ether_addr(addr
->sa_data
))
361 return -EADDRNOTAVAIL
;
363 if (!(dev
->flags
& IFF_UP
)) {
364 /* Just copy in the new address */
365 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
367 /* Rehash and update the device filters */
368 if (macvlan_addr_busy(vlan
->port
, addr
->sa_data
))
371 err
= dev_uc_add(lowerdev
, addr
->sa_data
);
375 dev_uc_del(lowerdev
, dev
->dev_addr
);
377 macvlan_hash_change_addr(vlan
, addr
->sa_data
);
382 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
384 struct macvlan_dev
*vlan
= netdev_priv(dev
);
385 struct net_device
*lowerdev
= vlan
->lowerdev
;
387 if (change
& IFF_ALLMULTI
)
388 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
391 static void macvlan_set_multicast_list(struct net_device
*dev
)
393 struct macvlan_dev
*vlan
= netdev_priv(dev
);
395 dev_mc_sync(vlan
->lowerdev
, dev
);
398 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
400 struct macvlan_dev
*vlan
= netdev_priv(dev
);
402 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
409 * macvlan network devices have devices nesting below it and are a special
410 * "super class" of normal network devices; split their locks off into a
411 * separate class since they always nest.
413 static struct lock_class_key macvlan_netdev_xmit_lock_key
;
414 static struct lock_class_key macvlan_netdev_addr_lock_key
;
416 #define MACVLAN_FEATURES \
417 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
418 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
419 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM)
421 #define MACVLAN_STATE_MASK \
422 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
424 static void macvlan_set_lockdep_class_one(struct net_device
*dev
,
425 struct netdev_queue
*txq
,
428 lockdep_set_class(&txq
->_xmit_lock
,
429 &macvlan_netdev_xmit_lock_key
);
432 static void macvlan_set_lockdep_class(struct net_device
*dev
)
434 lockdep_set_class(&dev
->addr_list_lock
,
435 &macvlan_netdev_addr_lock_key
);
436 netdev_for_each_tx_queue(dev
, macvlan_set_lockdep_class_one
, NULL
);
439 static int macvlan_init(struct net_device
*dev
)
441 struct macvlan_dev
*vlan
= netdev_priv(dev
);
442 const struct net_device
*lowerdev
= vlan
->lowerdev
;
444 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
445 (lowerdev
->state
& MACVLAN_STATE_MASK
);
446 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
447 dev
->features
|= NETIF_F_LLTX
;
448 dev
->gso_max_size
= lowerdev
->gso_max_size
;
449 dev
->iflink
= lowerdev
->ifindex
;
450 dev
->hard_header_len
= lowerdev
->hard_header_len
;
452 macvlan_set_lockdep_class(dev
);
454 vlan
->pcpu_stats
= alloc_percpu(struct macvlan_pcpu_stats
);
455 if (!vlan
->pcpu_stats
)
461 static void macvlan_uninit(struct net_device
*dev
)
463 struct macvlan_dev
*vlan
= netdev_priv(dev
);
464 struct macvlan_port
*port
= vlan
->port
;
466 free_percpu(vlan
->pcpu_stats
);
470 macvlan_port_destroy(port
->dev
);
473 static struct rtnl_link_stats64
*macvlan_dev_get_stats64(struct net_device
*dev
,
474 struct rtnl_link_stats64
*stats
)
476 struct macvlan_dev
*vlan
= netdev_priv(dev
);
478 if (vlan
->pcpu_stats
) {
479 struct macvlan_pcpu_stats
*p
;
480 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
481 u32 rx_errors
= 0, tx_dropped
= 0;
485 for_each_possible_cpu(i
) {
486 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
488 start
= u64_stats_fetch_begin_bh(&p
->syncp
);
489 rx_packets
= p
->rx_packets
;
490 rx_bytes
= p
->rx_bytes
;
491 rx_multicast
= p
->rx_multicast
;
492 tx_packets
= p
->tx_packets
;
493 tx_bytes
= p
->tx_bytes
;
494 } while (u64_stats_fetch_retry_bh(&p
->syncp
, start
));
496 stats
->rx_packets
+= rx_packets
;
497 stats
->rx_bytes
+= rx_bytes
;
498 stats
->multicast
+= rx_multicast
;
499 stats
->tx_packets
+= tx_packets
;
500 stats
->tx_bytes
+= tx_bytes
;
501 /* rx_errors & tx_dropped are u32, updated
502 * without syncp protection.
504 rx_errors
+= p
->rx_errors
;
505 tx_dropped
+= p
->tx_dropped
;
507 stats
->rx_errors
= rx_errors
;
508 stats
->rx_dropped
= rx_errors
;
509 stats
->tx_dropped
= tx_dropped
;
514 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
515 struct ethtool_drvinfo
*drvinfo
)
517 snprintf(drvinfo
->driver
, 32, "macvlan");
518 snprintf(drvinfo
->version
, 32, "0.1");
521 static int macvlan_ethtool_get_settings(struct net_device
*dev
,
522 struct ethtool_cmd
*cmd
)
524 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
525 return dev_ethtool_get_settings(vlan
->lowerdev
, cmd
);
528 static const struct ethtool_ops macvlan_ethtool_ops
= {
529 .get_link
= ethtool_op_get_link
,
530 .get_settings
= macvlan_ethtool_get_settings
,
531 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
534 static const struct net_device_ops macvlan_netdev_ops
= {
535 .ndo_init
= macvlan_init
,
536 .ndo_uninit
= macvlan_uninit
,
537 .ndo_open
= macvlan_open
,
538 .ndo_stop
= macvlan_stop
,
539 .ndo_start_xmit
= macvlan_start_xmit
,
540 .ndo_change_mtu
= macvlan_change_mtu
,
541 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
542 .ndo_set_mac_address
= macvlan_set_mac_address
,
543 .ndo_set_multicast_list
= macvlan_set_multicast_list
,
544 .ndo_get_stats64
= macvlan_dev_get_stats64
,
545 .ndo_validate_addr
= eth_validate_addr
,
548 void macvlan_common_setup(struct net_device
*dev
)
552 dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
553 dev
->netdev_ops
= &macvlan_netdev_ops
;
554 dev
->destructor
= free_netdev
;
555 dev
->header_ops
= &macvlan_hard_header_ops
,
556 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
558 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
560 static void macvlan_setup(struct net_device
*dev
)
562 macvlan_common_setup(dev
);
563 dev
->tx_queue_len
= 0;
566 static int macvlan_port_create(struct net_device
*dev
)
568 struct macvlan_port
*port
;
572 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
575 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
579 port
->passthru
= false;
581 INIT_LIST_HEAD(&port
->vlans
);
582 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
583 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
585 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
589 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
593 static void macvlan_port_rcu_free(struct rcu_head
*head
)
595 struct macvlan_port
*port
;
597 port
= container_of(head
, struct macvlan_port
, rcu
);
601 static void macvlan_port_destroy(struct net_device
*dev
)
603 struct macvlan_port
*port
= macvlan_port_get(dev
);
605 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
606 netdev_rx_handler_unregister(dev
);
607 call_rcu(&port
->rcu
, macvlan_port_rcu_free
);
610 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
612 if (tb
[IFLA_ADDRESS
]) {
613 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
615 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
616 return -EADDRNOTAVAIL
;
619 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
620 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
621 case MACVLAN_MODE_PRIVATE
:
622 case MACVLAN_MODE_VEPA
:
623 case MACVLAN_MODE_BRIDGE
:
624 case MACVLAN_MODE_PASSTHRU
:
633 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
634 struct nlattr
*tb
[], struct nlattr
*data
[],
635 int (*receive
)(struct sk_buff
*skb
),
636 int (*forward
)(struct net_device
*dev
,
637 struct sk_buff
*skb
))
639 struct macvlan_dev
*vlan
= netdev_priv(dev
);
640 struct macvlan_port
*port
;
641 struct net_device
*lowerdev
;
647 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
648 if (lowerdev
== NULL
)
651 /* When creating macvlans on top of other macvlans - use
652 * the real device as the lowerdev.
654 if (lowerdev
->rtnl_link_ops
== dev
->rtnl_link_ops
) {
655 struct macvlan_dev
*lowervlan
= netdev_priv(lowerdev
);
656 lowerdev
= lowervlan
->lowerdev
;
660 dev
->mtu
= lowerdev
->mtu
;
661 else if (dev
->mtu
> lowerdev
->mtu
)
664 if (!tb
[IFLA_ADDRESS
])
665 random_ether_addr(dev
->dev_addr
);
667 if (!macvlan_port_exists(lowerdev
)) {
668 err
= macvlan_port_create(lowerdev
);
672 port
= macvlan_port_get(lowerdev
);
674 /* Only 1 macvlan device can be created in passthru mode */
678 vlan
->lowerdev
= lowerdev
;
681 vlan
->receive
= receive
;
682 vlan
->forward
= forward
;
684 vlan
->mode
= MACVLAN_MODE_VEPA
;
685 if (data
&& data
[IFLA_MACVLAN_MODE
])
686 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
688 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
691 port
->passthru
= true;
692 memcpy(dev
->dev_addr
, lowerdev
->dev_addr
, ETH_ALEN
);
696 err
= register_netdevice(dev
);
700 list_add_tail(&vlan
->list
, &port
->vlans
);
701 netif_stacked_transfer_operstate(lowerdev
, dev
);
708 macvlan_port_destroy(lowerdev
);
712 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
714 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
715 struct nlattr
*tb
[], struct nlattr
*data
[])
717 return macvlan_common_newlink(src_net
, dev
, tb
, data
,
722 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
724 struct macvlan_dev
*vlan
= netdev_priv(dev
);
726 list_del(&vlan
->list
);
727 unregister_netdevice_queue(dev
, head
);
729 EXPORT_SYMBOL_GPL(macvlan_dellink
);
731 static int macvlan_changelink(struct net_device
*dev
,
732 struct nlattr
*tb
[], struct nlattr
*data
[])
734 struct macvlan_dev
*vlan
= netdev_priv(dev
);
735 if (data
&& data
[IFLA_MACVLAN_MODE
])
736 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
740 static size_t macvlan_get_size(const struct net_device
*dev
)
742 return nla_total_size(4);
745 static int macvlan_fill_info(struct sk_buff
*skb
,
746 const struct net_device
*dev
)
748 struct macvlan_dev
*vlan
= netdev_priv(dev
);
750 NLA_PUT_U32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
);
757 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
758 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
761 int macvlan_link_register(struct rtnl_link_ops
*ops
)
764 ops
->priv_size
= sizeof(struct macvlan_dev
);
765 ops
->validate
= macvlan_validate
;
766 ops
->maxtype
= IFLA_MACVLAN_MAX
;
767 ops
->policy
= macvlan_policy
;
768 ops
->changelink
= macvlan_changelink
;
769 ops
->get_size
= macvlan_get_size
;
770 ops
->fill_info
= macvlan_fill_info
;
772 return rtnl_link_register(ops
);
774 EXPORT_SYMBOL_GPL(macvlan_link_register
);
776 static struct rtnl_link_ops macvlan_link_ops
= {
778 .setup
= macvlan_setup
,
779 .newlink
= macvlan_newlink
,
780 .dellink
= macvlan_dellink
,
783 static int macvlan_device_event(struct notifier_block
*unused
,
784 unsigned long event
, void *ptr
)
786 struct net_device
*dev
= ptr
;
787 struct macvlan_dev
*vlan
, *next
;
788 struct macvlan_port
*port
;
789 LIST_HEAD(list_kill
);
791 if (!macvlan_port_exists(dev
))
794 port
= macvlan_port_get(dev
);
798 list_for_each_entry(vlan
, &port
->vlans
, list
)
799 netif_stacked_transfer_operstate(vlan
->lowerdev
,
802 case NETDEV_FEAT_CHANGE
:
803 list_for_each_entry(vlan
, &port
->vlans
, list
) {
804 vlan
->dev
->features
= dev
->features
& MACVLAN_FEATURES
;
805 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
806 netdev_features_change(vlan
->dev
);
809 case NETDEV_UNREGISTER
:
810 /* twiddle thumbs on netns device moves */
811 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
814 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
815 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
816 unregister_netdevice_many(&list_kill
);
817 list_del(&list_kill
);
819 case NETDEV_PRE_TYPE_CHANGE
:
820 /* Forbid underlaying device to change its type. */
826 static struct notifier_block macvlan_notifier_block __read_mostly
= {
827 .notifier_call
= macvlan_device_event
,
830 static int __init
macvlan_init_module(void)
834 register_netdevice_notifier(&macvlan_notifier_block
);
836 err
= macvlan_link_register(&macvlan_link_ops
);
841 unregister_netdevice_notifier(&macvlan_notifier_block
);
845 static void __exit
macvlan_cleanup_module(void)
847 rtnl_link_unregister(&macvlan_link_ops
);
848 unregister_netdevice_notifier(&macvlan_notifier_block
);
851 module_init(macvlan_init_module
);
852 module_exit(macvlan_cleanup_module
);
854 MODULE_LICENSE("GPL");
855 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
856 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
857 MODULE_ALIAS_RTNL_LINK("macvlan");