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 <net/rtnetlink.h>
36 #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
39 struct net_device
*dev
;
40 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
41 struct list_head vlans
;
47 static void macvlan_port_destroy(struct net_device
*dev
);
49 #define macvlan_port_get_rcu(dev) \
50 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
51 #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
52 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
54 static struct macvlan_dev
*macvlan_hash_lookup(const struct macvlan_port
*port
,
55 const unsigned char *addr
)
57 struct macvlan_dev
*vlan
;
60 hlist_for_each_entry_rcu(vlan
, n
, &port
->vlan_hash
[addr
[5]], hlist
) {
61 if (ether_addr_equal_64bits(vlan
->dev
->dev_addr
, addr
))
67 static void macvlan_hash_add(struct macvlan_dev
*vlan
)
69 struct macvlan_port
*port
= vlan
->port
;
70 const unsigned char *addr
= vlan
->dev
->dev_addr
;
72 hlist_add_head_rcu(&vlan
->hlist
, &port
->vlan_hash
[addr
[5]]);
75 static void macvlan_hash_del(struct macvlan_dev
*vlan
, bool sync
)
77 hlist_del_rcu(&vlan
->hlist
);
82 static void macvlan_hash_change_addr(struct macvlan_dev
*vlan
,
83 const unsigned char *addr
)
85 macvlan_hash_del(vlan
, true);
86 /* Now that we are unhashed it is safe to change the device
87 * address without confusing packet delivery.
89 memcpy(vlan
->dev
->dev_addr
, addr
, ETH_ALEN
);
90 macvlan_hash_add(vlan
);
93 static int macvlan_addr_busy(const struct macvlan_port
*port
,
94 const unsigned char *addr
)
96 /* Test to see if the specified multicast address is
97 * currently in use by the underlying device or
100 if (ether_addr_equal_64bits(port
->dev
->dev_addr
, addr
))
103 if (macvlan_hash_lookup(port
, addr
))
110 static int macvlan_broadcast_one(struct sk_buff
*skb
,
111 const struct macvlan_dev
*vlan
,
112 const struct ethhdr
*eth
, bool local
)
114 struct net_device
*dev
= vlan
->dev
;
119 return vlan
->forward(dev
, skb
);
122 if (ether_addr_equal_64bits(eth
->h_dest
, dev
->broadcast
))
123 skb
->pkt_type
= PACKET_BROADCAST
;
125 skb
->pkt_type
= PACKET_MULTICAST
;
127 return vlan
->receive(skb
);
130 static u32
macvlan_hash_mix(const struct macvlan_dev
*vlan
)
132 return (u32
)(((unsigned long)vlan
) >> L1_CACHE_SHIFT
);
136 static unsigned int mc_hash(const struct macvlan_dev
*vlan
,
137 const unsigned char *addr
)
139 u32 val
= __get_unaligned_cpu32(addr
+ 2);
141 val
^= macvlan_hash_mix(vlan
);
142 return hash_32(val
, MACVLAN_MC_FILTER_BITS
);
145 static void macvlan_broadcast(struct sk_buff
*skb
,
146 const struct macvlan_port
*port
,
147 struct net_device
*src
,
148 enum macvlan_mode mode
)
150 const struct ethhdr
*eth
= eth_hdr(skb
);
151 const struct macvlan_dev
*vlan
;
152 struct hlist_node
*n
;
153 struct sk_buff
*nskb
;
158 if (skb
->protocol
== htons(ETH_P_PAUSE
))
161 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
162 hlist_for_each_entry_rcu(vlan
, n
, &port
->vlan_hash
[i
], hlist
) {
163 if (vlan
->dev
== src
|| !(vlan
->mode
& mode
))
166 hash
= mc_hash(vlan
, eth
->h_dest
);
167 if (!test_bit(hash
, vlan
->mc_filter
))
169 nskb
= skb_clone(skb
, GFP_ATOMIC
);
170 err
= macvlan_broadcast_one(nskb
, vlan
, eth
,
171 mode
== MACVLAN_MODE_BRIDGE
);
172 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
173 err
== NET_RX_SUCCESS
, 1);
178 /* called under rcu_read_lock() from netif_receive_skb */
179 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
181 struct macvlan_port
*port
;
182 struct sk_buff
*skb
= *pskb
;
183 const struct ethhdr
*eth
= eth_hdr(skb
);
184 const struct macvlan_dev
*vlan
;
185 const struct macvlan_dev
*src
;
186 struct net_device
*dev
;
187 unsigned int len
= 0;
188 int ret
= NET_RX_DROP
;
190 port
= macvlan_port_get_rcu(skb
->dev
);
191 if (is_multicast_ether_addr(eth
->h_dest
)) {
192 skb
= ip_check_defrag(skb
, IP_DEFRAG_MACVLAN
);
194 return RX_HANDLER_CONSUMED
;
196 src
= macvlan_hash_lookup(port
, eth
->h_source
);
198 /* frame comes from an external address */
199 macvlan_broadcast(skb
, port
, NULL
,
200 MACVLAN_MODE_PRIVATE
|
202 MACVLAN_MODE_PASSTHRU
|
203 MACVLAN_MODE_BRIDGE
);
204 else if (src
->mode
== MACVLAN_MODE_VEPA
)
205 /* flood to everyone except source */
206 macvlan_broadcast(skb
, port
, src
->dev
,
208 MACVLAN_MODE_BRIDGE
);
209 else if (src
->mode
== MACVLAN_MODE_BRIDGE
)
211 * flood only to VEPA ports, bridge ports
212 * already saw the frame on the way out.
214 macvlan_broadcast(skb
, port
, src
->dev
,
217 /* forward to original port. */
219 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0);
223 return RX_HANDLER_PASS
;
227 vlan
= list_first_entry(&port
->vlans
, struct macvlan_dev
, list
);
229 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
231 return RX_HANDLER_PASS
;
234 if (unlikely(!(dev
->flags
& IFF_UP
))) {
236 return RX_HANDLER_CONSUMED
;
238 len
= skb
->len
+ ETH_HLEN
;
239 skb
= skb_share_check(skb
, GFP_ATOMIC
);
244 skb
->pkt_type
= PACKET_HOST
;
246 ret
= vlan
->receive(skb
);
249 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, 0);
250 return RX_HANDLER_CONSUMED
;
253 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
255 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
256 const struct macvlan_port
*port
= vlan
->port
;
257 const struct macvlan_dev
*dest
;
258 __u8 ip_summed
= skb
->ip_summed
;
260 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
261 const struct ethhdr
*eth
= (void *)skb
->data
;
262 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
264 /* send to other bridge ports directly */
265 if (is_multicast_ether_addr(eth
->h_dest
)) {
266 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
270 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
271 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
272 /* send to lowerdev first for its network taps */
273 dev_forward_skb(vlan
->lowerdev
, skb
);
275 return NET_XMIT_SUCCESS
;
280 skb
->ip_summed
= ip_summed
;
281 skb
->dev
= vlan
->lowerdev
;
282 return dev_queue_xmit(skb
);
285 netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
286 struct net_device
*dev
)
288 unsigned int len
= skb
->len
;
290 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
292 ret
= macvlan_queue_xmit(skb
, dev
);
293 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
294 struct macvlan_pcpu_stats
*pcpu_stats
;
296 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
297 u64_stats_update_begin(&pcpu_stats
->syncp
);
298 pcpu_stats
->tx_packets
++;
299 pcpu_stats
->tx_bytes
+= len
;
300 u64_stats_update_end(&pcpu_stats
->syncp
);
302 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
306 EXPORT_SYMBOL_GPL(macvlan_start_xmit
);
308 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
309 unsigned short type
, const void *daddr
,
310 const void *saddr
, unsigned len
)
312 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
313 struct net_device
*lowerdev
= vlan
->lowerdev
;
315 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
316 saddr
? : dev
->dev_addr
, len
);
319 static const struct header_ops macvlan_hard_header_ops
= {
320 .create
= macvlan_hard_header
,
321 .rebuild
= eth_rebuild_header
,
322 .parse
= eth_header_parse
,
323 .cache
= eth_header_cache
,
324 .cache_update
= eth_header_cache_update
,
327 static int macvlan_open(struct net_device
*dev
)
329 struct macvlan_dev
*vlan
= netdev_priv(dev
);
330 struct net_device
*lowerdev
= vlan
->lowerdev
;
333 if (vlan
->port
->passthru
) {
334 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
335 dev_set_promiscuity(lowerdev
, 1);
340 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
343 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
346 if (dev
->flags
& IFF_ALLMULTI
) {
347 err
= dev_set_allmulti(lowerdev
, 1);
353 macvlan_hash_add(vlan
);
357 dev_uc_del(lowerdev
, dev
->dev_addr
);
362 static int macvlan_stop(struct net_device
*dev
)
364 struct macvlan_dev
*vlan
= netdev_priv(dev
);
365 struct net_device
*lowerdev
= vlan
->lowerdev
;
367 dev_uc_unsync(lowerdev
, dev
);
368 dev_mc_unsync(lowerdev
, dev
);
370 if (vlan
->port
->passthru
) {
371 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
372 dev_set_promiscuity(lowerdev
, -1);
376 if (dev
->flags
& IFF_ALLMULTI
)
377 dev_set_allmulti(lowerdev
, -1);
379 dev_uc_del(lowerdev
, dev
->dev_addr
);
382 macvlan_hash_del(vlan
, !dev
->dismantle
);
386 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
388 struct macvlan_dev
*vlan
= netdev_priv(dev
);
389 struct net_device
*lowerdev
= vlan
->lowerdev
;
390 struct sockaddr
*addr
= p
;
393 if (!is_valid_ether_addr(addr
->sa_data
))
394 return -EADDRNOTAVAIL
;
396 if (!(dev
->flags
& IFF_UP
)) {
397 /* Just copy in the new address */
398 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
400 /* Rehash and update the device filters */
401 if (macvlan_addr_busy(vlan
->port
, addr
->sa_data
))
404 err
= dev_uc_add(lowerdev
, addr
->sa_data
);
408 dev_uc_del(lowerdev
, dev
->dev_addr
);
410 macvlan_hash_change_addr(vlan
, addr
->sa_data
);
415 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
417 struct macvlan_dev
*vlan
= netdev_priv(dev
);
418 struct net_device
*lowerdev
= vlan
->lowerdev
;
420 if (change
& IFF_ALLMULTI
)
421 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
424 static void macvlan_set_mac_lists(struct net_device
*dev
)
426 struct macvlan_dev
*vlan
= netdev_priv(dev
);
428 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
429 bitmap_fill(vlan
->mc_filter
, MACVLAN_MC_FILTER_SZ
);
431 struct netdev_hw_addr
*ha
;
432 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
434 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
435 netdev_for_each_mc_addr(ha
, dev
) {
436 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
439 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
441 bitmap_copy(vlan
->mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
443 dev_uc_sync(vlan
->lowerdev
, dev
);
444 dev_mc_sync(vlan
->lowerdev
, dev
);
447 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
449 struct macvlan_dev
*vlan
= netdev_priv(dev
);
451 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
458 * macvlan network devices have devices nesting below it and are a special
459 * "super class" of normal network devices; split their locks off into a
460 * separate class since they always nest.
462 static struct lock_class_key macvlan_netdev_xmit_lock_key
;
463 static struct lock_class_key macvlan_netdev_addr_lock_key
;
465 #define MACVLAN_FEATURES \
466 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
467 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
468 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
469 NETIF_F_HW_VLAN_FILTER)
471 #define MACVLAN_STATE_MASK \
472 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
474 static void macvlan_set_lockdep_class_one(struct net_device
*dev
,
475 struct netdev_queue
*txq
,
478 lockdep_set_class(&txq
->_xmit_lock
,
479 &macvlan_netdev_xmit_lock_key
);
482 static void macvlan_set_lockdep_class(struct net_device
*dev
)
484 lockdep_set_class(&dev
->addr_list_lock
,
485 &macvlan_netdev_addr_lock_key
);
486 netdev_for_each_tx_queue(dev
, macvlan_set_lockdep_class_one
, NULL
);
489 static int macvlan_init(struct net_device
*dev
)
491 struct macvlan_dev
*vlan
= netdev_priv(dev
);
492 const struct net_device
*lowerdev
= vlan
->lowerdev
;
494 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
495 (lowerdev
->state
& MACVLAN_STATE_MASK
);
496 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
497 dev
->features
|= NETIF_F_LLTX
;
498 dev
->gso_max_size
= lowerdev
->gso_max_size
;
499 dev
->iflink
= lowerdev
->ifindex
;
500 dev
->hard_header_len
= lowerdev
->hard_header_len
;
502 macvlan_set_lockdep_class(dev
);
504 vlan
->pcpu_stats
= alloc_percpu(struct macvlan_pcpu_stats
);
505 if (!vlan
->pcpu_stats
)
511 static void macvlan_uninit(struct net_device
*dev
)
513 struct macvlan_dev
*vlan
= netdev_priv(dev
);
514 struct macvlan_port
*port
= vlan
->port
;
516 free_percpu(vlan
->pcpu_stats
);
520 macvlan_port_destroy(port
->dev
);
523 static struct rtnl_link_stats64
*macvlan_dev_get_stats64(struct net_device
*dev
,
524 struct rtnl_link_stats64
*stats
)
526 struct macvlan_dev
*vlan
= netdev_priv(dev
);
528 if (vlan
->pcpu_stats
) {
529 struct macvlan_pcpu_stats
*p
;
530 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
531 u32 rx_errors
= 0, tx_dropped
= 0;
535 for_each_possible_cpu(i
) {
536 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
538 start
= u64_stats_fetch_begin_bh(&p
->syncp
);
539 rx_packets
= p
->rx_packets
;
540 rx_bytes
= p
->rx_bytes
;
541 rx_multicast
= p
->rx_multicast
;
542 tx_packets
= p
->tx_packets
;
543 tx_bytes
= p
->tx_bytes
;
544 } while (u64_stats_fetch_retry_bh(&p
->syncp
, start
));
546 stats
->rx_packets
+= rx_packets
;
547 stats
->rx_bytes
+= rx_bytes
;
548 stats
->multicast
+= rx_multicast
;
549 stats
->tx_packets
+= tx_packets
;
550 stats
->tx_bytes
+= tx_bytes
;
551 /* rx_errors & tx_dropped are u32, updated
552 * without syncp protection.
554 rx_errors
+= p
->rx_errors
;
555 tx_dropped
+= p
->tx_dropped
;
557 stats
->rx_errors
= rx_errors
;
558 stats
->rx_dropped
= rx_errors
;
559 stats
->tx_dropped
= tx_dropped
;
564 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
567 struct macvlan_dev
*vlan
= netdev_priv(dev
);
568 struct net_device
*lowerdev
= vlan
->lowerdev
;
570 return vlan_vid_add(lowerdev
, vid
);
573 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
576 struct macvlan_dev
*vlan
= netdev_priv(dev
);
577 struct net_device
*lowerdev
= vlan
->lowerdev
;
579 vlan_vid_del(lowerdev
, vid
);
583 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
584 struct net_device
*dev
,
585 const unsigned char *addr
,
588 struct macvlan_dev
*vlan
= netdev_priv(dev
);
591 if (!vlan
->port
->passthru
)
594 if (is_unicast_ether_addr(addr
))
595 err
= dev_uc_add_excl(dev
, addr
);
596 else if (is_multicast_ether_addr(addr
))
597 err
= dev_mc_add_excl(dev
, addr
);
602 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
603 struct net_device
*dev
,
604 const unsigned char *addr
)
606 struct macvlan_dev
*vlan
= netdev_priv(dev
);
609 if (!vlan
->port
->passthru
)
612 if (is_unicast_ether_addr(addr
))
613 err
= dev_uc_del(dev
, addr
);
614 else if (is_multicast_ether_addr(addr
))
615 err
= dev_mc_del(dev
, addr
);
620 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
621 struct ethtool_drvinfo
*drvinfo
)
623 strlcpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
624 strlcpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
627 static int macvlan_ethtool_get_settings(struct net_device
*dev
,
628 struct ethtool_cmd
*cmd
)
630 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
632 return __ethtool_get_settings(vlan
->lowerdev
, cmd
);
635 static const struct ethtool_ops macvlan_ethtool_ops
= {
636 .get_link
= ethtool_op_get_link
,
637 .get_settings
= macvlan_ethtool_get_settings
,
638 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
641 static const struct net_device_ops macvlan_netdev_ops
= {
642 .ndo_init
= macvlan_init
,
643 .ndo_uninit
= macvlan_uninit
,
644 .ndo_open
= macvlan_open
,
645 .ndo_stop
= macvlan_stop
,
646 .ndo_start_xmit
= macvlan_start_xmit
,
647 .ndo_change_mtu
= macvlan_change_mtu
,
648 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
649 .ndo_set_mac_address
= macvlan_set_mac_address
,
650 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
651 .ndo_get_stats64
= macvlan_dev_get_stats64
,
652 .ndo_validate_addr
= eth_validate_addr
,
653 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
654 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
655 .ndo_fdb_add
= macvlan_fdb_add
,
656 .ndo_fdb_del
= macvlan_fdb_del
,
657 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
660 void macvlan_common_setup(struct net_device
*dev
)
664 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
665 dev
->netdev_ops
= &macvlan_netdev_ops
;
666 dev
->destructor
= free_netdev
;
667 dev
->header_ops
= &macvlan_hard_header_ops
,
668 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
670 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
672 static void macvlan_setup(struct net_device
*dev
)
674 macvlan_common_setup(dev
);
675 dev
->tx_queue_len
= 0;
678 static int macvlan_port_create(struct net_device
*dev
)
680 struct macvlan_port
*port
;
684 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
687 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
691 port
->passthru
= false;
693 INIT_LIST_HEAD(&port
->vlans
);
694 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
695 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
697 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
701 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
705 static void macvlan_port_destroy(struct net_device
*dev
)
707 struct macvlan_port
*port
= macvlan_port_get(dev
);
709 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
710 netdev_rx_handler_unregister(dev
);
711 kfree_rcu(port
, rcu
);
714 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
716 if (tb
[IFLA_ADDRESS
]) {
717 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
719 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
720 return -EADDRNOTAVAIL
;
723 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
724 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
725 case MACVLAN_MODE_PRIVATE
:
726 case MACVLAN_MODE_VEPA
:
727 case MACVLAN_MODE_BRIDGE
:
728 case MACVLAN_MODE_PASSTHRU
:
737 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
738 struct nlattr
*tb
[], struct nlattr
*data
[],
739 int (*receive
)(struct sk_buff
*skb
),
740 int (*forward
)(struct net_device
*dev
,
741 struct sk_buff
*skb
))
743 struct macvlan_dev
*vlan
= netdev_priv(dev
);
744 struct macvlan_port
*port
;
745 struct net_device
*lowerdev
;
751 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
752 if (lowerdev
== NULL
)
755 /* When creating macvlans on top of other macvlans - use
756 * the real device as the lowerdev.
758 if (lowerdev
->rtnl_link_ops
== dev
->rtnl_link_ops
) {
759 struct macvlan_dev
*lowervlan
= netdev_priv(lowerdev
);
760 lowerdev
= lowervlan
->lowerdev
;
764 dev
->mtu
= lowerdev
->mtu
;
765 else if (dev
->mtu
> lowerdev
->mtu
)
768 if (!tb
[IFLA_ADDRESS
])
769 eth_hw_addr_random(dev
);
771 if (!macvlan_port_exists(lowerdev
)) {
772 err
= macvlan_port_create(lowerdev
);
776 port
= macvlan_port_get(lowerdev
);
778 /* Only 1 macvlan device can be created in passthru mode */
782 vlan
->lowerdev
= lowerdev
;
785 vlan
->receive
= receive
;
786 vlan
->forward
= forward
;
788 vlan
->mode
= MACVLAN_MODE_VEPA
;
789 if (data
&& data
[IFLA_MACVLAN_MODE
])
790 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
792 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
793 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
795 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
798 port
->passthru
= true;
799 memcpy(dev
->dev_addr
, lowerdev
->dev_addr
, ETH_ALEN
);
802 err
= netdev_upper_dev_link(lowerdev
, dev
);
807 err
= register_netdevice(dev
);
809 goto upper_dev_unlink
;
811 list_add_tail(&vlan
->list
, &port
->vlans
);
812 netif_stacked_transfer_operstate(lowerdev
, dev
);
817 netdev_upper_dev_unlink(lowerdev
, dev
);
821 macvlan_port_destroy(lowerdev
);
825 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
827 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
828 struct nlattr
*tb
[], struct nlattr
*data
[])
830 return macvlan_common_newlink(src_net
, dev
, tb
, data
,
835 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
837 struct macvlan_dev
*vlan
= netdev_priv(dev
);
839 list_del(&vlan
->list
);
840 unregister_netdevice_queue(dev
, head
);
841 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
843 EXPORT_SYMBOL_GPL(macvlan_dellink
);
845 static int macvlan_changelink(struct net_device
*dev
,
846 struct nlattr
*tb
[], struct nlattr
*data
[])
848 struct macvlan_dev
*vlan
= netdev_priv(dev
);
849 if (data
&& data
[IFLA_MACVLAN_MODE
])
850 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
851 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
852 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
853 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
855 if (promisc
&& (flags
& MACVLAN_FLAG_NOPROMISC
))
856 dev_set_promiscuity(vlan
->lowerdev
, -1);
857 else if (promisc
&& !(flags
& MACVLAN_FLAG_NOPROMISC
))
858 dev_set_promiscuity(vlan
->lowerdev
, 1);
864 static size_t macvlan_get_size(const struct net_device
*dev
)
867 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
868 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
872 static int macvlan_fill_info(struct sk_buff
*skb
,
873 const struct net_device
*dev
)
875 struct macvlan_dev
*vlan
= netdev_priv(dev
);
877 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
878 goto nla_put_failure
;
879 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
880 goto nla_put_failure
;
887 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
888 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
889 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
892 int macvlan_link_register(struct rtnl_link_ops
*ops
)
895 ops
->priv_size
= sizeof(struct macvlan_dev
);
896 ops
->validate
= macvlan_validate
;
897 ops
->maxtype
= IFLA_MACVLAN_MAX
;
898 ops
->policy
= macvlan_policy
;
899 ops
->changelink
= macvlan_changelink
;
900 ops
->get_size
= macvlan_get_size
;
901 ops
->fill_info
= macvlan_fill_info
;
903 return rtnl_link_register(ops
);
905 EXPORT_SYMBOL_GPL(macvlan_link_register
);
907 static struct rtnl_link_ops macvlan_link_ops
= {
909 .setup
= macvlan_setup
,
910 .newlink
= macvlan_newlink
,
911 .dellink
= macvlan_dellink
,
914 static int macvlan_device_event(struct notifier_block
*unused
,
915 unsigned long event
, void *ptr
)
917 struct net_device
*dev
= ptr
;
918 struct macvlan_dev
*vlan
, *next
;
919 struct macvlan_port
*port
;
920 LIST_HEAD(list_kill
);
922 if (!macvlan_port_exists(dev
))
925 port
= macvlan_port_get(dev
);
929 list_for_each_entry(vlan
, &port
->vlans
, list
)
930 netif_stacked_transfer_operstate(vlan
->lowerdev
,
933 case NETDEV_FEAT_CHANGE
:
934 list_for_each_entry(vlan
, &port
->vlans
, list
) {
935 vlan
->dev
->features
= dev
->features
& MACVLAN_FEATURES
;
936 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
937 netdev_features_change(vlan
->dev
);
940 case NETDEV_UNREGISTER
:
941 /* twiddle thumbs on netns device moves */
942 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
945 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
946 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
947 unregister_netdevice_many(&list_kill
);
948 list_del(&list_kill
);
950 case NETDEV_PRE_TYPE_CHANGE
:
951 /* Forbid underlaying device to change its type. */
957 static struct notifier_block macvlan_notifier_block __read_mostly
= {
958 .notifier_call
= macvlan_device_event
,
961 static int __init
macvlan_init_module(void)
965 register_netdevice_notifier(&macvlan_notifier_block
);
967 err
= macvlan_link_register(&macvlan_link_ops
);
972 unregister_netdevice_notifier(&macvlan_notifier_block
);
976 static void __exit
macvlan_cleanup_module(void)
978 rtnl_link_unregister(&macvlan_link_ops
);
979 unregister_netdevice_notifier(&macvlan_notifier_block
);
982 module_init(macvlan_init_module
);
983 module_exit(macvlan_cleanup_module
);
985 MODULE_LICENSE("GPL");
986 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
987 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
988 MODULE_ALIAS_RTNL_LINK("macvlan");