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
,
242 struct sk_buff
*nskb
;
245 nskb
= skb_clone(skb
, GFP_ATOMIC
);
249 spin_lock(&port
->bc_queue
.lock
);
250 if (skb_queue_len(&port
->bc_queue
) < skb
->dev
->tx_queue_len
) {
251 __skb_queue_tail(&port
->bc_queue
, nskb
);
254 spin_unlock(&port
->bc_queue
.lock
);
259 schedule_work(&port
->bc_work
);
265 atomic_long_inc(&skb
->dev
->rx_dropped
);
268 /* called under rcu_read_lock() from netif_receive_skb */
269 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
271 struct macvlan_port
*port
;
272 struct sk_buff
*skb
= *pskb
;
273 const struct ethhdr
*eth
= eth_hdr(skb
);
274 const struct macvlan_dev
*vlan
;
275 const struct macvlan_dev
*src
;
276 struct net_device
*dev
;
277 unsigned int len
= 0;
278 int ret
= NET_RX_DROP
;
280 port
= macvlan_port_get_rcu(skb
->dev
);
281 if (is_multicast_ether_addr(eth
->h_dest
)) {
282 skb
= ip_check_defrag(skb
, IP_DEFRAG_MACVLAN
);
284 return RX_HANDLER_CONSUMED
;
286 src
= macvlan_hash_lookup(port
, eth
->h_source
);
287 if (src
&& src
->mode
!= MACVLAN_MODE_VEPA
&&
288 src
->mode
!= MACVLAN_MODE_BRIDGE
) {
289 /* forward to original port. */
291 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0) ?:
296 MACVLAN_SKB_CB(skb
)->src
= src
;
297 macvlan_broadcast_enqueue(port
, skb
);
299 return RX_HANDLER_PASS
;
303 vlan
= list_first_or_null_rcu(&port
->vlans
,
304 struct macvlan_dev
, list
);
306 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
308 return RX_HANDLER_PASS
;
311 if (unlikely(!(dev
->flags
& IFF_UP
))) {
313 return RX_HANDLER_CONSUMED
;
315 len
= skb
->len
+ ETH_HLEN
;
316 skb
= skb_share_check(skb
, GFP_ATOMIC
);
321 skb
->pkt_type
= PACKET_HOST
;
326 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, 0);
327 return RX_HANDLER_CONSUMED
;
330 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
332 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
333 const struct macvlan_port
*port
= vlan
->port
;
334 const struct macvlan_dev
*dest
;
335 __u8 ip_summed
= skb
->ip_summed
;
337 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
338 const struct ethhdr
*eth
= (void *)skb
->data
;
339 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
341 /* send to other bridge ports directly */
342 if (is_multicast_ether_addr(eth
->h_dest
)) {
343 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
347 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
348 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
349 /* send to lowerdev first for its network taps */
350 dev_forward_skb(vlan
->lowerdev
, skb
);
352 return NET_XMIT_SUCCESS
;
357 skb
->ip_summed
= ip_summed
;
358 skb
->dev
= vlan
->lowerdev
;
359 return dev_queue_xmit(skb
);
362 static netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
363 struct net_device
*dev
)
365 unsigned int len
= skb
->len
;
367 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
369 if (vlan
->fwd_priv
) {
370 skb
->dev
= vlan
->lowerdev
;
371 ret
= dev_queue_xmit_accel(skb
, vlan
->fwd_priv
);
373 ret
= macvlan_queue_xmit(skb
, dev
);
376 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
377 struct vlan_pcpu_stats
*pcpu_stats
;
379 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
380 u64_stats_update_begin(&pcpu_stats
->syncp
);
381 pcpu_stats
->tx_packets
++;
382 pcpu_stats
->tx_bytes
+= len
;
383 u64_stats_update_end(&pcpu_stats
->syncp
);
385 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
390 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
391 unsigned short type
, const void *daddr
,
392 const void *saddr
, unsigned len
)
394 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
395 struct net_device
*lowerdev
= vlan
->lowerdev
;
397 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
398 saddr
? : dev
->dev_addr
, len
);
401 static const struct header_ops macvlan_hard_header_ops
= {
402 .create
= macvlan_hard_header
,
403 .rebuild
= eth_rebuild_header
,
404 .parse
= eth_header_parse
,
405 .cache
= eth_header_cache
,
406 .cache_update
= eth_header_cache_update
,
409 static struct rtnl_link_ops macvlan_link_ops
;
411 static int macvlan_open(struct net_device
*dev
)
413 struct macvlan_dev
*vlan
= netdev_priv(dev
);
414 struct net_device
*lowerdev
= vlan
->lowerdev
;
417 if (vlan
->port
->passthru
) {
418 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
)) {
419 err
= dev_set_promiscuity(lowerdev
, 1);
426 if (lowerdev
->features
& NETIF_F_HW_L2FW_DOFFLOAD
&&
427 dev
->rtnl_link_ops
== &macvlan_link_ops
) {
429 lowerdev
->netdev_ops
->ndo_dfwd_add_station(lowerdev
, dev
);
431 /* If we get a NULL pointer back, or if we get an error
432 * then we should just fall through to the non accelerated path
434 if (IS_ERR_OR_NULL(vlan
->fwd_priv
)) {
435 vlan
->fwd_priv
= NULL
;
441 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
444 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
447 if (dev
->flags
& IFF_ALLMULTI
) {
448 err
= dev_set_allmulti(lowerdev
, 1);
454 macvlan_hash_add(vlan
);
458 dev_uc_del(lowerdev
, dev
->dev_addr
);
460 if (vlan
->fwd_priv
) {
461 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
463 vlan
->fwd_priv
= NULL
;
468 static int macvlan_stop(struct net_device
*dev
)
470 struct macvlan_dev
*vlan
= netdev_priv(dev
);
471 struct net_device
*lowerdev
= vlan
->lowerdev
;
473 if (vlan
->fwd_priv
) {
474 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
476 vlan
->fwd_priv
= NULL
;
480 dev_uc_unsync(lowerdev
, dev
);
481 dev_mc_unsync(lowerdev
, dev
);
483 if (vlan
->port
->passthru
) {
484 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
485 dev_set_promiscuity(lowerdev
, -1);
489 if (dev
->flags
& IFF_ALLMULTI
)
490 dev_set_allmulti(lowerdev
, -1);
492 dev_uc_del(lowerdev
, dev
->dev_addr
);
495 macvlan_hash_del(vlan
, !dev
->dismantle
);
499 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
501 struct macvlan_dev
*vlan
= netdev_priv(dev
);
502 struct net_device
*lowerdev
= vlan
->lowerdev
;
503 struct sockaddr
*addr
= p
;
506 if (!is_valid_ether_addr(addr
->sa_data
))
507 return -EADDRNOTAVAIL
;
509 if (!(dev
->flags
& IFF_UP
)) {
510 /* Just copy in the new address */
511 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
513 /* Rehash and update the device filters */
514 if (macvlan_addr_busy(vlan
->port
, addr
->sa_data
))
517 err
= dev_uc_add(lowerdev
, addr
->sa_data
);
521 dev_uc_del(lowerdev
, dev
->dev_addr
);
523 macvlan_hash_change_addr(vlan
, addr
->sa_data
);
528 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
530 struct macvlan_dev
*vlan
= netdev_priv(dev
);
531 struct net_device
*lowerdev
= vlan
->lowerdev
;
533 if (change
& IFF_ALLMULTI
)
534 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
537 static void macvlan_set_mac_lists(struct net_device
*dev
)
539 struct macvlan_dev
*vlan
= netdev_priv(dev
);
541 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
542 bitmap_fill(vlan
->mc_filter
, MACVLAN_MC_FILTER_SZ
);
544 struct netdev_hw_addr
*ha
;
545 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
547 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
548 netdev_for_each_mc_addr(ha
, dev
) {
549 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
552 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
554 bitmap_copy(vlan
->mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
556 dev_uc_sync(vlan
->lowerdev
, dev
);
557 dev_mc_sync(vlan
->lowerdev
, dev
);
560 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
562 struct macvlan_dev
*vlan
= netdev_priv(dev
);
564 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
571 * macvlan network devices have devices nesting below it and are a special
572 * "super class" of normal network devices; split their locks off into a
573 * separate class since they always nest.
575 static struct lock_class_key macvlan_netdev_xmit_lock_key
;
576 static struct lock_class_key macvlan_netdev_addr_lock_key
;
578 #define ALWAYS_ON_FEATURES \
579 (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX)
581 #define MACVLAN_FEATURES \
582 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
583 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
584 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
585 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
587 #define MACVLAN_STATE_MASK \
588 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
590 static void macvlan_set_lockdep_class_one(struct net_device
*dev
,
591 struct netdev_queue
*txq
,
594 lockdep_set_class(&txq
->_xmit_lock
,
595 &macvlan_netdev_xmit_lock_key
);
598 static void macvlan_set_lockdep_class(struct net_device
*dev
)
600 lockdep_set_class(&dev
->addr_list_lock
,
601 &macvlan_netdev_addr_lock_key
);
602 netdev_for_each_tx_queue(dev
, macvlan_set_lockdep_class_one
, NULL
);
605 static int macvlan_init(struct net_device
*dev
)
607 struct macvlan_dev
*vlan
= netdev_priv(dev
);
608 const struct net_device
*lowerdev
= vlan
->lowerdev
;
610 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
611 (lowerdev
->state
& MACVLAN_STATE_MASK
);
612 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
613 dev
->features
|= ALWAYS_ON_FEATURES
;
614 dev
->gso_max_size
= lowerdev
->gso_max_size
;
615 dev
->iflink
= lowerdev
->ifindex
;
616 dev
->hard_header_len
= lowerdev
->hard_header_len
;
618 macvlan_set_lockdep_class(dev
);
620 vlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct vlan_pcpu_stats
);
621 if (!vlan
->pcpu_stats
)
627 static void macvlan_uninit(struct net_device
*dev
)
629 struct macvlan_dev
*vlan
= netdev_priv(dev
);
630 struct macvlan_port
*port
= vlan
->port
;
632 free_percpu(vlan
->pcpu_stats
);
636 macvlan_port_destroy(port
->dev
);
639 static struct rtnl_link_stats64
*macvlan_dev_get_stats64(struct net_device
*dev
,
640 struct rtnl_link_stats64
*stats
)
642 struct macvlan_dev
*vlan
= netdev_priv(dev
);
644 if (vlan
->pcpu_stats
) {
645 struct vlan_pcpu_stats
*p
;
646 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
647 u32 rx_errors
= 0, tx_dropped
= 0;
651 for_each_possible_cpu(i
) {
652 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
654 start
= u64_stats_fetch_begin_irq(&p
->syncp
);
655 rx_packets
= p
->rx_packets
;
656 rx_bytes
= p
->rx_bytes
;
657 rx_multicast
= p
->rx_multicast
;
658 tx_packets
= p
->tx_packets
;
659 tx_bytes
= p
->tx_bytes
;
660 } while (u64_stats_fetch_retry_irq(&p
->syncp
, start
));
662 stats
->rx_packets
+= rx_packets
;
663 stats
->rx_bytes
+= rx_bytes
;
664 stats
->multicast
+= rx_multicast
;
665 stats
->tx_packets
+= tx_packets
;
666 stats
->tx_bytes
+= tx_bytes
;
667 /* rx_errors & tx_dropped are u32, updated
668 * without syncp protection.
670 rx_errors
+= p
->rx_errors
;
671 tx_dropped
+= p
->tx_dropped
;
673 stats
->rx_errors
= rx_errors
;
674 stats
->rx_dropped
= rx_errors
;
675 stats
->tx_dropped
= tx_dropped
;
680 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
681 __be16 proto
, u16 vid
)
683 struct macvlan_dev
*vlan
= netdev_priv(dev
);
684 struct net_device
*lowerdev
= vlan
->lowerdev
;
686 return vlan_vid_add(lowerdev
, proto
, vid
);
689 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
690 __be16 proto
, u16 vid
)
692 struct macvlan_dev
*vlan
= netdev_priv(dev
);
693 struct net_device
*lowerdev
= vlan
->lowerdev
;
695 vlan_vid_del(lowerdev
, proto
, vid
);
699 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
700 struct net_device
*dev
,
701 const unsigned char *addr
,
704 struct macvlan_dev
*vlan
= netdev_priv(dev
);
707 if (!vlan
->port
->passthru
)
710 if (flags
& NLM_F_REPLACE
)
713 if (is_unicast_ether_addr(addr
))
714 err
= dev_uc_add_excl(dev
, addr
);
715 else if (is_multicast_ether_addr(addr
))
716 err
= dev_mc_add_excl(dev
, addr
);
721 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
722 struct net_device
*dev
,
723 const unsigned char *addr
)
725 struct macvlan_dev
*vlan
= netdev_priv(dev
);
728 if (!vlan
->port
->passthru
)
731 if (is_unicast_ether_addr(addr
))
732 err
= dev_uc_del(dev
, addr
);
733 else if (is_multicast_ether_addr(addr
))
734 err
= dev_mc_del(dev
, addr
);
739 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
740 struct ethtool_drvinfo
*drvinfo
)
742 strlcpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
743 strlcpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
746 static int macvlan_ethtool_get_settings(struct net_device
*dev
,
747 struct ethtool_cmd
*cmd
)
749 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
751 return __ethtool_get_settings(vlan
->lowerdev
, cmd
);
754 static netdev_features_t
macvlan_fix_features(struct net_device
*dev
,
755 netdev_features_t features
)
757 struct macvlan_dev
*vlan
= netdev_priv(dev
);
758 netdev_features_t mask
;
760 features
|= NETIF_F_ALL_FOR_ALL
;
761 features
&= (vlan
->set_features
| ~MACVLAN_FEATURES
);
764 features
= netdev_increment_features(vlan
->lowerdev
->features
,
767 features
|= ALWAYS_ON_FEATURES
;
772 static const struct ethtool_ops macvlan_ethtool_ops
= {
773 .get_link
= ethtool_op_get_link
,
774 .get_settings
= macvlan_ethtool_get_settings
,
775 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
778 static const struct net_device_ops macvlan_netdev_ops
= {
779 .ndo_init
= macvlan_init
,
780 .ndo_uninit
= macvlan_uninit
,
781 .ndo_open
= macvlan_open
,
782 .ndo_stop
= macvlan_stop
,
783 .ndo_start_xmit
= macvlan_start_xmit
,
784 .ndo_change_mtu
= macvlan_change_mtu
,
785 .ndo_fix_features
= macvlan_fix_features
,
786 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
787 .ndo_set_mac_address
= macvlan_set_mac_address
,
788 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
789 .ndo_get_stats64
= macvlan_dev_get_stats64
,
790 .ndo_validate_addr
= eth_validate_addr
,
791 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
792 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
793 .ndo_fdb_add
= macvlan_fdb_add
,
794 .ndo_fdb_del
= macvlan_fdb_del
,
795 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
798 void macvlan_common_setup(struct net_device
*dev
)
802 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
803 dev
->priv_flags
|= IFF_UNICAST_FLT
;
804 dev
->netdev_ops
= &macvlan_netdev_ops
;
805 dev
->destructor
= free_netdev
;
806 dev
->header_ops
= &macvlan_hard_header_ops
;
807 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
809 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
811 static void macvlan_setup(struct net_device
*dev
)
813 macvlan_common_setup(dev
);
814 dev
->tx_queue_len
= 0;
817 static int macvlan_port_create(struct net_device
*dev
)
819 struct macvlan_port
*port
;
823 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
826 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
830 port
->passthru
= false;
832 INIT_LIST_HEAD(&port
->vlans
);
833 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
834 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
836 skb_queue_head_init(&port
->bc_queue
);
837 INIT_WORK(&port
->bc_work
, macvlan_process_broadcast
);
839 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
843 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
847 static void macvlan_port_destroy(struct net_device
*dev
)
849 struct macvlan_port
*port
= macvlan_port_get_rtnl(dev
);
851 cancel_work_sync(&port
->bc_work
);
852 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
853 netdev_rx_handler_unregister(dev
);
854 kfree_rcu(port
, rcu
);
857 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
859 if (tb
[IFLA_ADDRESS
]) {
860 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
862 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
863 return -EADDRNOTAVAIL
;
866 if (data
&& data
[IFLA_MACVLAN_FLAGS
] &&
867 nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]) & ~MACVLAN_FLAG_NOPROMISC
)
870 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
871 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
872 case MACVLAN_MODE_PRIVATE
:
873 case MACVLAN_MODE_VEPA
:
874 case MACVLAN_MODE_BRIDGE
:
875 case MACVLAN_MODE_PASSTHRU
:
884 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
885 struct nlattr
*tb
[], struct nlattr
*data
[])
887 struct macvlan_dev
*vlan
= netdev_priv(dev
);
888 struct macvlan_port
*port
;
889 struct net_device
*lowerdev
;
895 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
896 if (lowerdev
== NULL
)
899 /* When creating macvlans or macvtaps on top of other macvlans - use
900 * the real device as the lowerdev.
902 if (netif_is_macvlan(lowerdev
))
903 lowerdev
= macvlan_dev_real_dev(lowerdev
);
906 dev
->mtu
= lowerdev
->mtu
;
907 else if (dev
->mtu
> lowerdev
->mtu
)
910 if (!tb
[IFLA_ADDRESS
])
911 eth_hw_addr_random(dev
);
913 if (!macvlan_port_exists(lowerdev
)) {
914 err
= macvlan_port_create(lowerdev
);
918 port
= macvlan_port_get_rtnl(lowerdev
);
920 /* Only 1 macvlan device can be created in passthru mode */
924 vlan
->lowerdev
= lowerdev
;
927 vlan
->set_features
= MACVLAN_FEATURES
;
929 vlan
->mode
= MACVLAN_MODE_VEPA
;
930 if (data
&& data
[IFLA_MACVLAN_MODE
])
931 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
933 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
934 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
936 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
939 port
->passthru
= true;
940 eth_hw_addr_inherit(dev
, lowerdev
);
944 err
= register_netdevice(dev
);
948 dev
->priv_flags
|= IFF_MACVLAN
;
949 err
= netdev_upper_dev_link(lowerdev
, dev
);
951 goto unregister_netdev
;
953 list_add_tail_rcu(&vlan
->list
, &port
->vlans
);
954 netif_stacked_transfer_operstate(lowerdev
, dev
);
959 unregister_netdevice(dev
);
963 macvlan_port_destroy(lowerdev
);
967 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
969 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
970 struct nlattr
*tb
[], struct nlattr
*data
[])
972 return macvlan_common_newlink(src_net
, dev
, tb
, data
);
975 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
977 struct macvlan_dev
*vlan
= netdev_priv(dev
);
979 list_del_rcu(&vlan
->list
);
980 unregister_netdevice_queue(dev
, head
);
981 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
983 EXPORT_SYMBOL_GPL(macvlan_dellink
);
985 static int macvlan_changelink(struct net_device
*dev
,
986 struct nlattr
*tb
[], struct nlattr
*data
[])
988 struct macvlan_dev
*vlan
= netdev_priv(dev
);
989 enum macvlan_mode mode
;
990 bool set_mode
= false;
992 /* Validate mode, but don't set yet: setting flags may fail. */
993 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
995 mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
996 /* Passthrough mode can't be set or cleared dynamically */
997 if ((mode
== MACVLAN_MODE_PASSTHRU
) !=
998 (vlan
->mode
== MACVLAN_MODE_PASSTHRU
))
1002 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
1003 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1004 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
1005 if (vlan
->port
->passthru
&& promisc
) {
1008 if (flags
& MACVLAN_FLAG_NOPROMISC
)
1009 err
= dev_set_promiscuity(vlan
->lowerdev
, -1);
1011 err
= dev_set_promiscuity(vlan
->lowerdev
, 1);
1015 vlan
->flags
= flags
;
1022 static size_t macvlan_get_size(const struct net_device
*dev
)
1025 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1026 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1030 static int macvlan_fill_info(struct sk_buff
*skb
,
1031 const struct net_device
*dev
)
1033 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1035 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
1036 goto nla_put_failure
;
1037 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
1038 goto nla_put_failure
;
1045 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
1046 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
1047 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
1050 int macvlan_link_register(struct rtnl_link_ops
*ops
)
1053 ops
->priv_size
= sizeof(struct macvlan_dev
);
1054 ops
->validate
= macvlan_validate
;
1055 ops
->maxtype
= IFLA_MACVLAN_MAX
;
1056 ops
->policy
= macvlan_policy
;
1057 ops
->changelink
= macvlan_changelink
;
1058 ops
->get_size
= macvlan_get_size
;
1059 ops
->fill_info
= macvlan_fill_info
;
1061 return rtnl_link_register(ops
);
1063 EXPORT_SYMBOL_GPL(macvlan_link_register
);
1065 static struct rtnl_link_ops macvlan_link_ops
= {
1067 .setup
= macvlan_setup
,
1068 .newlink
= macvlan_newlink
,
1069 .dellink
= macvlan_dellink
,
1072 static int macvlan_device_event(struct notifier_block
*unused
,
1073 unsigned long event
, void *ptr
)
1075 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1076 struct macvlan_dev
*vlan
, *next
;
1077 struct macvlan_port
*port
;
1078 LIST_HEAD(list_kill
);
1080 if (!macvlan_port_exists(dev
))
1083 port
= macvlan_port_get_rtnl(dev
);
1087 list_for_each_entry(vlan
, &port
->vlans
, list
)
1088 netif_stacked_transfer_operstate(vlan
->lowerdev
,
1091 case NETDEV_FEAT_CHANGE
:
1092 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1093 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
1094 netdev_update_features(vlan
->dev
);
1097 case NETDEV_UNREGISTER
:
1098 /* twiddle thumbs on netns device moves */
1099 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
1102 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
1103 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
1104 unregister_netdevice_many(&list_kill
);
1105 list_del(&list_kill
);
1107 case NETDEV_PRE_TYPE_CHANGE
:
1108 /* Forbid underlaying device to change its type. */
1114 static struct notifier_block macvlan_notifier_block __read_mostly
= {
1115 .notifier_call
= macvlan_device_event
,
1118 static int __init
macvlan_init_module(void)
1122 register_netdevice_notifier(&macvlan_notifier_block
);
1124 err
= macvlan_link_register(&macvlan_link_ops
);
1129 unregister_netdevice_notifier(&macvlan_notifier_block
);
1133 static void __exit
macvlan_cleanup_module(void)
1135 rtnl_link_unregister(&macvlan_link_ops
);
1136 unregister_netdevice_notifier(&macvlan_notifier_block
);
1139 module_init(macvlan_init_module
);
1140 module_exit(macvlan_cleanup_module
);
1142 MODULE_LICENSE("GPL");
1143 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1144 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1145 MODULE_ALIAS_RTNL_LINK("macvlan");