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>
37 #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
40 struct net_device
*dev
;
41 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
42 struct list_head vlans
;
44 struct sk_buff_head bc_queue
;
45 struct work_struct bc_work
;
50 struct macvlan_skb_cb
{
51 const struct macvlan_dev
*src
;
54 #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
56 static void macvlan_port_destroy(struct net_device
*dev
);
58 static struct macvlan_port
*macvlan_port_get_rcu(const struct net_device
*dev
)
60 return rcu_dereference(dev
->rx_handler_data
);
63 static struct macvlan_port
*macvlan_port_get_rtnl(const struct net_device
*dev
)
65 return rtnl_dereference(dev
->rx_handler_data
);
68 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
70 static struct macvlan_dev
*macvlan_hash_lookup(const struct macvlan_port
*port
,
71 const unsigned char *addr
)
73 struct macvlan_dev
*vlan
;
75 hlist_for_each_entry_rcu(vlan
, &port
->vlan_hash
[addr
[5]], hlist
) {
76 if (ether_addr_equal_64bits(vlan
->dev
->dev_addr
, addr
))
82 static void macvlan_hash_add(struct macvlan_dev
*vlan
)
84 struct macvlan_port
*port
= vlan
->port
;
85 const unsigned char *addr
= vlan
->dev
->dev_addr
;
87 hlist_add_head_rcu(&vlan
->hlist
, &port
->vlan_hash
[addr
[5]]);
90 static void macvlan_hash_del(struct macvlan_dev
*vlan
, bool sync
)
92 hlist_del_rcu(&vlan
->hlist
);
97 static void macvlan_hash_change_addr(struct macvlan_dev
*vlan
,
98 const unsigned char *addr
)
100 macvlan_hash_del(vlan
, true);
101 /* Now that we are unhashed it is safe to change the device
102 * address without confusing packet delivery.
104 memcpy(vlan
->dev
->dev_addr
, addr
, ETH_ALEN
);
105 macvlan_hash_add(vlan
);
108 static int macvlan_addr_busy(const struct macvlan_port
*port
,
109 const unsigned char *addr
)
111 /* Test to see if the specified multicast address is
112 * currently in use by the underlying device or
115 if (ether_addr_equal_64bits(port
->dev
->dev_addr
, addr
))
118 if (macvlan_hash_lookup(port
, addr
))
125 static int macvlan_broadcast_one(struct sk_buff
*skb
,
126 const struct macvlan_dev
*vlan
,
127 const struct ethhdr
*eth
, bool local
)
129 struct net_device
*dev
= vlan
->dev
;
132 return __dev_forward_skb(dev
, skb
);
135 if (ether_addr_equal_64bits(eth
->h_dest
, dev
->broadcast
))
136 skb
->pkt_type
= PACKET_BROADCAST
;
138 skb
->pkt_type
= PACKET_MULTICAST
;
143 static u32
macvlan_hash_mix(const struct macvlan_dev
*vlan
)
145 return (u32
)(((unsigned long)vlan
) >> L1_CACHE_SHIFT
);
149 static unsigned int mc_hash(const struct macvlan_dev
*vlan
,
150 const unsigned char *addr
)
152 u32 val
= __get_unaligned_cpu32(addr
+ 2);
154 val
^= macvlan_hash_mix(vlan
);
155 return hash_32(val
, MACVLAN_MC_FILTER_BITS
);
158 static void macvlan_broadcast(struct sk_buff
*skb
,
159 const struct macvlan_port
*port
,
160 struct net_device
*src
,
161 enum macvlan_mode mode
)
163 const struct ethhdr
*eth
= eth_hdr(skb
);
164 const struct macvlan_dev
*vlan
;
165 struct sk_buff
*nskb
;
170 if (skb
->protocol
== htons(ETH_P_PAUSE
))
173 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
174 hlist_for_each_entry_rcu(vlan
, &port
->vlan_hash
[i
], hlist
) {
175 if (vlan
->dev
== src
|| !(vlan
->mode
& mode
))
178 hash
= mc_hash(vlan
, eth
->h_dest
);
179 if (!test_bit(hash
, vlan
->mc_filter
))
183 nskb
= skb_clone(skb
, GFP_ATOMIC
);
185 err
= macvlan_broadcast_one(
187 mode
== MACVLAN_MODE_BRIDGE
) ?:
189 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
190 err
== NET_RX_SUCCESS
, 1);
195 static void macvlan_process_broadcast(struct work_struct
*w
)
197 struct macvlan_port
*port
= container_of(w
, struct macvlan_port
,
200 struct sk_buff_head list
;
202 skb_queue_head_init(&list
);
204 spin_lock_bh(&port
->bc_queue
.lock
);
205 skb_queue_splice_tail_init(&port
->bc_queue
, &list
);
206 spin_unlock_bh(&port
->bc_queue
.lock
);
208 while ((skb
= __skb_dequeue(&list
))) {
209 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
214 /* frame comes from an external address */
215 macvlan_broadcast(skb
, port
, NULL
,
216 MACVLAN_MODE_PRIVATE
|
218 MACVLAN_MODE_PASSTHRU
|
219 MACVLAN_MODE_BRIDGE
);
220 else if (src
->mode
== MACVLAN_MODE_VEPA
)
221 /* flood to everyone except source */
222 macvlan_broadcast(skb
, port
, src
->dev
,
224 MACVLAN_MODE_BRIDGE
);
227 * flood only to VEPA ports, bridge ports
228 * already saw the frame on the way out.
230 macvlan_broadcast(skb
, port
, src
->dev
,
239 static void macvlan_broadcast_enqueue(struct macvlan_port
*port
,
244 skb
= skb_clone(skb
, GFP_ATOMIC
);
248 spin_lock(&port
->bc_queue
.lock
);
249 if (skb_queue_len(&port
->bc_queue
) < skb
->dev
->tx_queue_len
) {
250 __skb_queue_tail(&port
->bc_queue
, skb
);
253 spin_unlock(&port
->bc_queue
.lock
);
258 schedule_work(&port
->bc_work
);
262 atomic_long_inc(&skb
->dev
->rx_dropped
);
265 /* called under rcu_read_lock() from netif_receive_skb */
266 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
268 struct macvlan_port
*port
;
269 struct sk_buff
*skb
= *pskb
;
270 const struct ethhdr
*eth
= eth_hdr(skb
);
271 const struct macvlan_dev
*vlan
;
272 const struct macvlan_dev
*src
;
273 struct net_device
*dev
;
274 unsigned int len
= 0;
275 int ret
= NET_RX_DROP
;
277 port
= macvlan_port_get_rcu(skb
->dev
);
278 if (is_multicast_ether_addr(eth
->h_dest
)) {
279 skb
= ip_check_defrag(skb
, IP_DEFRAG_MACVLAN
);
281 return RX_HANDLER_CONSUMED
;
283 src
= macvlan_hash_lookup(port
, eth
->h_source
);
284 if (src
&& src
->mode
!= MACVLAN_MODE_VEPA
&&
285 src
->mode
!= MACVLAN_MODE_BRIDGE
) {
286 /* forward to original port. */
288 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0) ?:
293 MACVLAN_SKB_CB(skb
)->src
= src
;
294 macvlan_broadcast_enqueue(port
, skb
);
296 return RX_HANDLER_PASS
;
300 vlan
= list_first_or_null_rcu(&port
->vlans
,
301 struct macvlan_dev
, list
);
303 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
305 return RX_HANDLER_PASS
;
308 if (unlikely(!(dev
->flags
& IFF_UP
))) {
310 return RX_HANDLER_CONSUMED
;
312 len
= skb
->len
+ ETH_HLEN
;
313 skb
= skb_share_check(skb
, GFP_ATOMIC
);
318 skb
->pkt_type
= PACKET_HOST
;
323 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, 0);
324 return RX_HANDLER_CONSUMED
;
327 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
329 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
330 const struct macvlan_port
*port
= vlan
->port
;
331 const struct macvlan_dev
*dest
;
332 __u8 ip_summed
= skb
->ip_summed
;
334 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
335 const struct ethhdr
*eth
= (void *)skb
->data
;
336 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
338 /* send to other bridge ports directly */
339 if (is_multicast_ether_addr(eth
->h_dest
)) {
340 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
344 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
345 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
346 /* send to lowerdev first for its network taps */
347 dev_forward_skb(vlan
->lowerdev
, skb
);
349 return NET_XMIT_SUCCESS
;
354 skb
->ip_summed
= ip_summed
;
355 skb
->dev
= vlan
->lowerdev
;
356 return dev_queue_xmit(skb
);
359 static netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
360 struct net_device
*dev
)
362 unsigned int len
= skb
->len
;
364 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
366 if (vlan
->fwd_priv
) {
367 skb
->dev
= vlan
->lowerdev
;
368 ret
= dev_queue_xmit_accel(skb
, vlan
->fwd_priv
);
370 ret
= macvlan_queue_xmit(skb
, dev
);
373 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
374 struct vlan_pcpu_stats
*pcpu_stats
;
376 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
377 u64_stats_update_begin(&pcpu_stats
->syncp
);
378 pcpu_stats
->tx_packets
++;
379 pcpu_stats
->tx_bytes
+= len
;
380 u64_stats_update_end(&pcpu_stats
->syncp
);
382 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
387 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
388 unsigned short type
, const void *daddr
,
389 const void *saddr
, unsigned len
)
391 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
392 struct net_device
*lowerdev
= vlan
->lowerdev
;
394 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
395 saddr
? : dev
->dev_addr
, len
);
398 static const struct header_ops macvlan_hard_header_ops
= {
399 .create
= macvlan_hard_header
,
400 .rebuild
= eth_rebuild_header
,
401 .parse
= eth_header_parse
,
402 .cache
= eth_header_cache
,
403 .cache_update
= eth_header_cache_update
,
406 static struct rtnl_link_ops macvlan_link_ops
;
408 static int macvlan_open(struct net_device
*dev
)
410 struct macvlan_dev
*vlan
= netdev_priv(dev
);
411 struct net_device
*lowerdev
= vlan
->lowerdev
;
414 if (vlan
->port
->passthru
) {
415 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
)) {
416 err
= dev_set_promiscuity(lowerdev
, 1);
423 if (lowerdev
->features
& NETIF_F_HW_L2FW_DOFFLOAD
&&
424 dev
->rtnl_link_ops
== &macvlan_link_ops
) {
426 lowerdev
->netdev_ops
->ndo_dfwd_add_station(lowerdev
, dev
);
428 /* If we get a NULL pointer back, or if we get an error
429 * then we should just fall through to the non accelerated path
431 if (IS_ERR_OR_NULL(vlan
->fwd_priv
)) {
432 vlan
->fwd_priv
= NULL
;
438 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
441 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
444 if (dev
->flags
& IFF_ALLMULTI
) {
445 err
= dev_set_allmulti(lowerdev
, 1);
451 macvlan_hash_add(vlan
);
455 dev_uc_del(lowerdev
, dev
->dev_addr
);
457 if (vlan
->fwd_priv
) {
458 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
460 vlan
->fwd_priv
= NULL
;
465 static int macvlan_stop(struct net_device
*dev
)
467 struct macvlan_dev
*vlan
= netdev_priv(dev
);
468 struct net_device
*lowerdev
= vlan
->lowerdev
;
470 if (vlan
->fwd_priv
) {
471 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
473 vlan
->fwd_priv
= NULL
;
477 dev_uc_unsync(lowerdev
, dev
);
478 dev_mc_unsync(lowerdev
, dev
);
480 if (vlan
->port
->passthru
) {
481 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
482 dev_set_promiscuity(lowerdev
, -1);
486 if (dev
->flags
& IFF_ALLMULTI
)
487 dev_set_allmulti(lowerdev
, -1);
489 dev_uc_del(lowerdev
, dev
->dev_addr
);
492 macvlan_hash_del(vlan
, !dev
->dismantle
);
496 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
498 struct macvlan_dev
*vlan
= netdev_priv(dev
);
499 struct net_device
*lowerdev
= vlan
->lowerdev
;
500 struct sockaddr
*addr
= p
;
503 if (!is_valid_ether_addr(addr
->sa_data
))
504 return -EADDRNOTAVAIL
;
506 if (!(dev
->flags
& IFF_UP
)) {
507 /* Just copy in the new address */
508 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
510 /* Rehash and update the device filters */
511 if (macvlan_addr_busy(vlan
->port
, addr
->sa_data
))
514 err
= dev_uc_add(lowerdev
, addr
->sa_data
);
518 dev_uc_del(lowerdev
, dev
->dev_addr
);
520 macvlan_hash_change_addr(vlan
, addr
->sa_data
);
525 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
527 struct macvlan_dev
*vlan
= netdev_priv(dev
);
528 struct net_device
*lowerdev
= vlan
->lowerdev
;
530 if (change
& IFF_ALLMULTI
)
531 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
534 static void macvlan_set_mac_lists(struct net_device
*dev
)
536 struct macvlan_dev
*vlan
= netdev_priv(dev
);
538 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
539 bitmap_fill(vlan
->mc_filter
, MACVLAN_MC_FILTER_SZ
);
541 struct netdev_hw_addr
*ha
;
542 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
544 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
545 netdev_for_each_mc_addr(ha
, dev
) {
546 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
549 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
551 bitmap_copy(vlan
->mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
553 dev_uc_sync(vlan
->lowerdev
, dev
);
554 dev_mc_sync(vlan
->lowerdev
, dev
);
557 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
559 struct macvlan_dev
*vlan
= netdev_priv(dev
);
561 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
568 * macvlan network devices have devices nesting below it and are a special
569 * "super class" of normal network devices; split their locks off into a
570 * separate class since they always nest.
572 static struct lock_class_key macvlan_netdev_xmit_lock_key
;
573 static struct lock_class_key macvlan_netdev_addr_lock_key
;
575 #define ALWAYS_ON_FEATURES \
576 (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX)
578 #define MACVLAN_FEATURES \
579 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
580 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
581 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
582 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
584 #define MACVLAN_STATE_MASK \
585 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
587 static void macvlan_set_lockdep_class_one(struct net_device
*dev
,
588 struct netdev_queue
*txq
,
591 lockdep_set_class(&txq
->_xmit_lock
,
592 &macvlan_netdev_xmit_lock_key
);
595 static void macvlan_set_lockdep_class(struct net_device
*dev
)
597 lockdep_set_class(&dev
->addr_list_lock
,
598 &macvlan_netdev_addr_lock_key
);
599 netdev_for_each_tx_queue(dev
, macvlan_set_lockdep_class_one
, NULL
);
602 static int macvlan_init(struct net_device
*dev
)
604 struct macvlan_dev
*vlan
= netdev_priv(dev
);
605 const struct net_device
*lowerdev
= vlan
->lowerdev
;
607 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
608 (lowerdev
->state
& MACVLAN_STATE_MASK
);
609 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
610 dev
->features
|= ALWAYS_ON_FEATURES
;
611 dev
->gso_max_size
= lowerdev
->gso_max_size
;
612 dev
->iflink
= lowerdev
->ifindex
;
613 dev
->hard_header_len
= lowerdev
->hard_header_len
;
615 macvlan_set_lockdep_class(dev
);
617 vlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct vlan_pcpu_stats
);
618 if (!vlan
->pcpu_stats
)
624 static void macvlan_uninit(struct net_device
*dev
)
626 struct macvlan_dev
*vlan
= netdev_priv(dev
);
627 struct macvlan_port
*port
= vlan
->port
;
629 free_percpu(vlan
->pcpu_stats
);
633 macvlan_port_destroy(port
->dev
);
636 static struct rtnl_link_stats64
*macvlan_dev_get_stats64(struct net_device
*dev
,
637 struct rtnl_link_stats64
*stats
)
639 struct macvlan_dev
*vlan
= netdev_priv(dev
);
641 if (vlan
->pcpu_stats
) {
642 struct vlan_pcpu_stats
*p
;
643 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
644 u32 rx_errors
= 0, tx_dropped
= 0;
648 for_each_possible_cpu(i
) {
649 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
651 start
= u64_stats_fetch_begin_irq(&p
->syncp
);
652 rx_packets
= p
->rx_packets
;
653 rx_bytes
= p
->rx_bytes
;
654 rx_multicast
= p
->rx_multicast
;
655 tx_packets
= p
->tx_packets
;
656 tx_bytes
= p
->tx_bytes
;
657 } while (u64_stats_fetch_retry_irq(&p
->syncp
, start
));
659 stats
->rx_packets
+= rx_packets
;
660 stats
->rx_bytes
+= rx_bytes
;
661 stats
->multicast
+= rx_multicast
;
662 stats
->tx_packets
+= tx_packets
;
663 stats
->tx_bytes
+= tx_bytes
;
664 /* rx_errors & tx_dropped are u32, updated
665 * without syncp protection.
667 rx_errors
+= p
->rx_errors
;
668 tx_dropped
+= p
->tx_dropped
;
670 stats
->rx_errors
= rx_errors
;
671 stats
->rx_dropped
= rx_errors
;
672 stats
->tx_dropped
= tx_dropped
;
677 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
678 __be16 proto
, u16 vid
)
680 struct macvlan_dev
*vlan
= netdev_priv(dev
);
681 struct net_device
*lowerdev
= vlan
->lowerdev
;
683 return vlan_vid_add(lowerdev
, proto
, vid
);
686 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
687 __be16 proto
, u16 vid
)
689 struct macvlan_dev
*vlan
= netdev_priv(dev
);
690 struct net_device
*lowerdev
= vlan
->lowerdev
;
692 vlan_vid_del(lowerdev
, proto
, vid
);
696 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
697 struct net_device
*dev
,
698 const unsigned char *addr
,
701 struct macvlan_dev
*vlan
= netdev_priv(dev
);
704 if (!vlan
->port
->passthru
)
707 if (flags
& NLM_F_REPLACE
)
710 if (is_unicast_ether_addr(addr
))
711 err
= dev_uc_add_excl(dev
, addr
);
712 else if (is_multicast_ether_addr(addr
))
713 err
= dev_mc_add_excl(dev
, addr
);
718 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
719 struct net_device
*dev
,
720 const unsigned char *addr
)
722 struct macvlan_dev
*vlan
= netdev_priv(dev
);
725 if (!vlan
->port
->passthru
)
728 if (is_unicast_ether_addr(addr
))
729 err
= dev_uc_del(dev
, addr
);
730 else if (is_multicast_ether_addr(addr
))
731 err
= dev_mc_del(dev
, addr
);
736 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
737 struct ethtool_drvinfo
*drvinfo
)
739 strlcpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
740 strlcpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
743 static int macvlan_ethtool_get_settings(struct net_device
*dev
,
744 struct ethtool_cmd
*cmd
)
746 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
748 return __ethtool_get_settings(vlan
->lowerdev
, cmd
);
751 static netdev_features_t
macvlan_fix_features(struct net_device
*dev
,
752 netdev_features_t features
)
754 struct macvlan_dev
*vlan
= netdev_priv(dev
);
755 netdev_features_t mask
;
757 features
|= NETIF_F_ALL_FOR_ALL
;
758 features
&= (vlan
->set_features
| ~MACVLAN_FEATURES
);
761 features
= netdev_increment_features(vlan
->lowerdev
->features
,
764 features
|= ALWAYS_ON_FEATURES
;
769 static const struct ethtool_ops macvlan_ethtool_ops
= {
770 .get_link
= ethtool_op_get_link
,
771 .get_settings
= macvlan_ethtool_get_settings
,
772 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
775 static const struct net_device_ops macvlan_netdev_ops
= {
776 .ndo_init
= macvlan_init
,
777 .ndo_uninit
= macvlan_uninit
,
778 .ndo_open
= macvlan_open
,
779 .ndo_stop
= macvlan_stop
,
780 .ndo_start_xmit
= macvlan_start_xmit
,
781 .ndo_change_mtu
= macvlan_change_mtu
,
782 .ndo_fix_features
= macvlan_fix_features
,
783 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
784 .ndo_set_mac_address
= macvlan_set_mac_address
,
785 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
786 .ndo_get_stats64
= macvlan_dev_get_stats64
,
787 .ndo_validate_addr
= eth_validate_addr
,
788 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
789 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
790 .ndo_fdb_add
= macvlan_fdb_add
,
791 .ndo_fdb_del
= macvlan_fdb_del
,
792 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
795 void macvlan_common_setup(struct net_device
*dev
)
799 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
800 dev
->priv_flags
|= IFF_UNICAST_FLT
;
801 dev
->netdev_ops
= &macvlan_netdev_ops
;
802 dev
->destructor
= free_netdev
;
803 dev
->header_ops
= &macvlan_hard_header_ops
;
804 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
806 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
808 static void macvlan_setup(struct net_device
*dev
)
810 macvlan_common_setup(dev
);
811 dev
->tx_queue_len
= 0;
814 static int macvlan_port_create(struct net_device
*dev
)
816 struct macvlan_port
*port
;
820 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
823 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
827 port
->passthru
= false;
829 INIT_LIST_HEAD(&port
->vlans
);
830 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
831 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
833 skb_queue_head_init(&port
->bc_queue
);
834 INIT_WORK(&port
->bc_work
, macvlan_process_broadcast
);
836 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
840 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
844 static void macvlan_port_destroy(struct net_device
*dev
)
846 struct macvlan_port
*port
= macvlan_port_get_rtnl(dev
);
848 cancel_work_sync(&port
->bc_work
);
849 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
850 netdev_rx_handler_unregister(dev
);
851 kfree_rcu(port
, rcu
);
854 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
856 if (tb
[IFLA_ADDRESS
]) {
857 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
859 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
860 return -EADDRNOTAVAIL
;
863 if (data
&& data
[IFLA_MACVLAN_FLAGS
] &&
864 nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]) & ~MACVLAN_FLAG_NOPROMISC
)
867 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
868 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
869 case MACVLAN_MODE_PRIVATE
:
870 case MACVLAN_MODE_VEPA
:
871 case MACVLAN_MODE_BRIDGE
:
872 case MACVLAN_MODE_PASSTHRU
:
881 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
882 struct nlattr
*tb
[], struct nlattr
*data
[])
884 struct macvlan_dev
*vlan
= netdev_priv(dev
);
885 struct macvlan_port
*port
;
886 struct net_device
*lowerdev
;
892 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
893 if (lowerdev
== NULL
)
896 /* When creating macvlans or macvtaps on top of other macvlans - use
897 * the real device as the lowerdev.
899 if (netif_is_macvlan(lowerdev
))
900 lowerdev
= macvlan_dev_real_dev(lowerdev
);
903 dev
->mtu
= lowerdev
->mtu
;
904 else if (dev
->mtu
> lowerdev
->mtu
)
907 if (!tb
[IFLA_ADDRESS
])
908 eth_hw_addr_random(dev
);
910 if (!macvlan_port_exists(lowerdev
)) {
911 err
= macvlan_port_create(lowerdev
);
915 port
= macvlan_port_get_rtnl(lowerdev
);
917 /* Only 1 macvlan device can be created in passthru mode */
921 vlan
->lowerdev
= lowerdev
;
924 vlan
->set_features
= MACVLAN_FEATURES
;
926 vlan
->mode
= MACVLAN_MODE_VEPA
;
927 if (data
&& data
[IFLA_MACVLAN_MODE
])
928 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
930 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
931 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
933 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
936 port
->passthru
= true;
937 eth_hw_addr_inherit(dev
, lowerdev
);
941 err
= register_netdevice(dev
);
945 dev
->priv_flags
|= IFF_MACVLAN
;
946 err
= netdev_upper_dev_link(lowerdev
, dev
);
948 goto unregister_netdev
;
950 list_add_tail_rcu(&vlan
->list
, &port
->vlans
);
951 netif_stacked_transfer_operstate(lowerdev
, dev
);
956 unregister_netdevice(dev
);
960 macvlan_port_destroy(lowerdev
);
964 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
966 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
967 struct nlattr
*tb
[], struct nlattr
*data
[])
969 return macvlan_common_newlink(src_net
, dev
, tb
, data
);
972 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
974 struct macvlan_dev
*vlan
= netdev_priv(dev
);
976 list_del_rcu(&vlan
->list
);
977 unregister_netdevice_queue(dev
, head
);
978 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
980 EXPORT_SYMBOL_GPL(macvlan_dellink
);
982 static int macvlan_changelink(struct net_device
*dev
,
983 struct nlattr
*tb
[], struct nlattr
*data
[])
985 struct macvlan_dev
*vlan
= netdev_priv(dev
);
986 enum macvlan_mode mode
;
987 bool set_mode
= false;
989 /* Validate mode, but don't set yet: setting flags may fail. */
990 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
992 mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
993 /* Passthrough mode can't be set or cleared dynamically */
994 if ((mode
== MACVLAN_MODE_PASSTHRU
) !=
995 (vlan
->mode
== MACVLAN_MODE_PASSTHRU
))
999 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
1000 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1001 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
1002 if (vlan
->port
->passthru
&& promisc
) {
1005 if (flags
& MACVLAN_FLAG_NOPROMISC
)
1006 err
= dev_set_promiscuity(vlan
->lowerdev
, -1);
1008 err
= dev_set_promiscuity(vlan
->lowerdev
, 1);
1012 vlan
->flags
= flags
;
1019 static size_t macvlan_get_size(const struct net_device
*dev
)
1022 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1023 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1027 static int macvlan_fill_info(struct sk_buff
*skb
,
1028 const struct net_device
*dev
)
1030 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1032 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
1033 goto nla_put_failure
;
1034 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
1035 goto nla_put_failure
;
1042 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
1043 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
1044 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
1047 int macvlan_link_register(struct rtnl_link_ops
*ops
)
1050 ops
->priv_size
= sizeof(struct macvlan_dev
);
1051 ops
->validate
= macvlan_validate
;
1052 ops
->maxtype
= IFLA_MACVLAN_MAX
;
1053 ops
->policy
= macvlan_policy
;
1054 ops
->changelink
= macvlan_changelink
;
1055 ops
->get_size
= macvlan_get_size
;
1056 ops
->fill_info
= macvlan_fill_info
;
1058 return rtnl_link_register(ops
);
1060 EXPORT_SYMBOL_GPL(macvlan_link_register
);
1062 static struct rtnl_link_ops macvlan_link_ops
= {
1064 .setup
= macvlan_setup
,
1065 .newlink
= macvlan_newlink
,
1066 .dellink
= macvlan_dellink
,
1069 static int macvlan_device_event(struct notifier_block
*unused
,
1070 unsigned long event
, void *ptr
)
1072 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1073 struct macvlan_dev
*vlan
, *next
;
1074 struct macvlan_port
*port
;
1075 LIST_HEAD(list_kill
);
1077 if (!macvlan_port_exists(dev
))
1080 port
= macvlan_port_get_rtnl(dev
);
1084 list_for_each_entry(vlan
, &port
->vlans
, list
)
1085 netif_stacked_transfer_operstate(vlan
->lowerdev
,
1088 case NETDEV_FEAT_CHANGE
:
1089 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1090 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
1091 netdev_update_features(vlan
->dev
);
1094 case NETDEV_UNREGISTER
:
1095 /* twiddle thumbs on netns device moves */
1096 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
1099 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
1100 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
1101 unregister_netdevice_many(&list_kill
);
1102 list_del(&list_kill
);
1104 case NETDEV_PRE_TYPE_CHANGE
:
1105 /* Forbid underlaying device to change its type. */
1111 static struct notifier_block macvlan_notifier_block __read_mostly
= {
1112 .notifier_call
= macvlan_device_event
,
1115 static int __init
macvlan_init_module(void)
1119 register_netdevice_notifier(&macvlan_notifier_block
);
1121 err
= macvlan_link_register(&macvlan_link_ops
);
1126 unregister_netdevice_notifier(&macvlan_notifier_block
);
1130 static void __exit
macvlan_cleanup_module(void)
1132 rtnl_link_unregister(&macvlan_link_ops
);
1133 unregister_netdevice_notifier(&macvlan_notifier_block
);
1136 module_init(macvlan_init_module
);
1137 module_exit(macvlan_cleanup_module
);
1139 MODULE_LICENSE("GPL");
1140 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1141 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1142 MODULE_ALIAS_RTNL_LINK("macvlan");