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>
36 #include <linux/netpoll.h>
38 #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
41 struct net_device
*dev
;
42 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
43 struct list_head vlans
;
45 struct sk_buff_head bc_queue
;
46 struct work_struct bc_work
;
50 #define MACVLAN_PORT_IS_EMPTY(port) list_empty(&port->vlans)
52 struct macvlan_skb_cb
{
53 const struct macvlan_dev
*src
;
56 #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
58 static void macvlan_port_destroy(struct net_device
*dev
);
60 static struct macvlan_port
*macvlan_port_get_rcu(const struct net_device
*dev
)
62 return rcu_dereference(dev
->rx_handler_data
);
65 static struct macvlan_port
*macvlan_port_get_rtnl(const struct net_device
*dev
)
67 return rtnl_dereference(dev
->rx_handler_data
);
70 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
72 static struct macvlan_dev
*macvlan_hash_lookup(const struct macvlan_port
*port
,
73 const unsigned char *addr
)
75 struct macvlan_dev
*vlan
;
77 hlist_for_each_entry_rcu(vlan
, &port
->vlan_hash
[addr
[5]], hlist
) {
78 if (ether_addr_equal_64bits(vlan
->dev
->dev_addr
, addr
))
84 static void macvlan_hash_add(struct macvlan_dev
*vlan
)
86 struct macvlan_port
*port
= vlan
->port
;
87 const unsigned char *addr
= vlan
->dev
->dev_addr
;
89 hlist_add_head_rcu(&vlan
->hlist
, &port
->vlan_hash
[addr
[5]]);
92 static void macvlan_hash_del(struct macvlan_dev
*vlan
, bool sync
)
94 hlist_del_rcu(&vlan
->hlist
);
99 static void macvlan_hash_change_addr(struct macvlan_dev
*vlan
,
100 const unsigned char *addr
)
102 macvlan_hash_del(vlan
, true);
103 /* Now that we are unhashed it is safe to change the device
104 * address without confusing packet delivery.
106 memcpy(vlan
->dev
->dev_addr
, addr
, ETH_ALEN
);
107 macvlan_hash_add(vlan
);
110 static int macvlan_addr_busy(const struct macvlan_port
*port
,
111 const unsigned char *addr
)
113 /* Test to see if the specified multicast address is
114 * currently in use by the underlying device or
117 if (ether_addr_equal_64bits(port
->dev
->dev_addr
, addr
))
120 if (macvlan_hash_lookup(port
, addr
))
127 static int macvlan_broadcast_one(struct sk_buff
*skb
,
128 const struct macvlan_dev
*vlan
,
129 const struct ethhdr
*eth
, bool local
)
131 struct net_device
*dev
= vlan
->dev
;
134 return __dev_forward_skb(dev
, skb
);
137 if (ether_addr_equal_64bits(eth
->h_dest
, dev
->broadcast
))
138 skb
->pkt_type
= PACKET_BROADCAST
;
140 skb
->pkt_type
= PACKET_MULTICAST
;
145 static u32
macvlan_hash_mix(const struct macvlan_dev
*vlan
)
147 return (u32
)(((unsigned long)vlan
) >> L1_CACHE_SHIFT
);
151 static unsigned int mc_hash(const struct macvlan_dev
*vlan
,
152 const unsigned char *addr
)
154 u32 val
= __get_unaligned_cpu32(addr
+ 2);
156 val
^= macvlan_hash_mix(vlan
);
157 return hash_32(val
, MACVLAN_MC_FILTER_BITS
);
160 static void macvlan_broadcast(struct sk_buff
*skb
,
161 const struct macvlan_port
*port
,
162 struct net_device
*src
,
163 enum macvlan_mode mode
)
165 const struct ethhdr
*eth
= eth_hdr(skb
);
166 const struct macvlan_dev
*vlan
;
167 struct sk_buff
*nskb
;
172 if (skb
->protocol
== htons(ETH_P_PAUSE
))
175 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
176 hlist_for_each_entry_rcu(vlan
, &port
->vlan_hash
[i
], hlist
) {
177 if (vlan
->dev
== src
|| !(vlan
->mode
& mode
))
180 hash
= mc_hash(vlan
, eth
->h_dest
);
181 if (!test_bit(hash
, vlan
->mc_filter
))
185 nskb
= skb_clone(skb
, GFP_ATOMIC
);
187 err
= macvlan_broadcast_one(
189 mode
== MACVLAN_MODE_BRIDGE
) ?:
191 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
192 err
== NET_RX_SUCCESS
, 1);
197 static void macvlan_process_broadcast(struct work_struct
*w
)
199 struct macvlan_port
*port
= container_of(w
, struct macvlan_port
,
202 struct sk_buff_head list
;
204 skb_queue_head_init(&list
);
206 spin_lock_bh(&port
->bc_queue
.lock
);
207 skb_queue_splice_tail_init(&port
->bc_queue
, &list
);
208 spin_unlock_bh(&port
->bc_queue
.lock
);
210 while ((skb
= __skb_dequeue(&list
))) {
211 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
216 /* frame comes from an external address */
217 macvlan_broadcast(skb
, port
, NULL
,
218 MACVLAN_MODE_PRIVATE
|
220 MACVLAN_MODE_PASSTHRU
|
221 MACVLAN_MODE_BRIDGE
);
222 else if (src
->mode
== MACVLAN_MODE_VEPA
)
223 /* flood to everyone except source */
224 macvlan_broadcast(skb
, port
, src
->dev
,
226 MACVLAN_MODE_BRIDGE
);
229 * flood only to VEPA ports, bridge ports
230 * already saw the frame on the way out.
232 macvlan_broadcast(skb
, port
, src
->dev
,
241 static void macvlan_broadcast_enqueue(struct macvlan_port
*port
,
244 struct sk_buff
*nskb
;
247 nskb
= skb_clone(skb
, GFP_ATOMIC
);
251 spin_lock(&port
->bc_queue
.lock
);
252 if (skb_queue_len(&port
->bc_queue
) < skb
->dev
->tx_queue_len
) {
253 __skb_queue_tail(&port
->bc_queue
, nskb
);
256 spin_unlock(&port
->bc_queue
.lock
);
261 schedule_work(&port
->bc_work
);
267 atomic_long_inc(&skb
->dev
->rx_dropped
);
270 /* called under rcu_read_lock() from netif_receive_skb */
271 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
273 struct macvlan_port
*port
;
274 struct sk_buff
*skb
= *pskb
;
275 const struct ethhdr
*eth
= eth_hdr(skb
);
276 const struct macvlan_dev
*vlan
;
277 const struct macvlan_dev
*src
;
278 struct net_device
*dev
;
279 unsigned int len
= 0;
280 int ret
= NET_RX_DROP
;
282 port
= macvlan_port_get_rcu(skb
->dev
);
283 if (is_multicast_ether_addr(eth
->h_dest
)) {
284 skb
= ip_check_defrag(skb
, IP_DEFRAG_MACVLAN
);
286 return RX_HANDLER_CONSUMED
;
288 src
= macvlan_hash_lookup(port
, eth
->h_source
);
289 if (src
&& src
->mode
!= MACVLAN_MODE_VEPA
&&
290 src
->mode
!= MACVLAN_MODE_BRIDGE
) {
291 /* forward to original port. */
293 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0) ?:
298 MACVLAN_SKB_CB(skb
)->src
= src
;
299 macvlan_broadcast_enqueue(port
, skb
);
301 return RX_HANDLER_PASS
;
305 vlan
= list_first_or_null_rcu(&port
->vlans
,
306 struct macvlan_dev
, list
);
308 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
310 return RX_HANDLER_PASS
;
313 if (unlikely(!(dev
->flags
& IFF_UP
))) {
315 return RX_HANDLER_CONSUMED
;
317 len
= skb
->len
+ ETH_HLEN
;
318 skb
= skb_share_check(skb
, GFP_ATOMIC
);
323 skb
->pkt_type
= PACKET_HOST
;
328 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, 0);
329 return RX_HANDLER_CONSUMED
;
332 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
334 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
335 const struct macvlan_port
*port
= vlan
->port
;
336 const struct macvlan_dev
*dest
;
338 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
339 const struct ethhdr
*eth
= (void *)skb
->data
;
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
->dev
= vlan
->lowerdev
;
358 return dev_queue_xmit(skb
);
361 static inline netdev_tx_t
macvlan_netpoll_send_skb(struct macvlan_dev
*vlan
, struct sk_buff
*skb
)
363 #ifdef CONFIG_NET_POLL_CONTROLLER
365 netpoll_send_skb(vlan
->netpoll
, skb
);
372 static netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
373 struct net_device
*dev
)
375 unsigned int len
= skb
->len
;
377 struct macvlan_dev
*vlan
= netdev_priv(dev
);
379 if (unlikely(netpoll_tx_running(dev
)))
380 return macvlan_netpoll_send_skb(vlan
, skb
);
382 if (vlan
->fwd_priv
) {
383 skb
->dev
= vlan
->lowerdev
;
384 ret
= dev_queue_xmit_accel(skb
, vlan
->fwd_priv
);
386 ret
= macvlan_queue_xmit(skb
, dev
);
389 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
390 struct vlan_pcpu_stats
*pcpu_stats
;
392 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
393 u64_stats_update_begin(&pcpu_stats
->syncp
);
394 pcpu_stats
->tx_packets
++;
395 pcpu_stats
->tx_bytes
+= len
;
396 u64_stats_update_end(&pcpu_stats
->syncp
);
398 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
403 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
404 unsigned short type
, const void *daddr
,
405 const void *saddr
, unsigned len
)
407 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
408 struct net_device
*lowerdev
= vlan
->lowerdev
;
410 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
411 saddr
? : dev
->dev_addr
, len
);
414 static const struct header_ops macvlan_hard_header_ops
= {
415 .create
= macvlan_hard_header
,
416 .rebuild
= eth_rebuild_header
,
417 .parse
= eth_header_parse
,
418 .cache
= eth_header_cache
,
419 .cache_update
= eth_header_cache_update
,
422 static struct rtnl_link_ops macvlan_link_ops
;
424 static int macvlan_open(struct net_device
*dev
)
426 struct macvlan_dev
*vlan
= netdev_priv(dev
);
427 struct net_device
*lowerdev
= vlan
->lowerdev
;
430 if (vlan
->port
->passthru
) {
431 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
)) {
432 err
= dev_set_promiscuity(lowerdev
, 1);
439 if (lowerdev
->features
& NETIF_F_HW_L2FW_DOFFLOAD
&&
440 dev
->rtnl_link_ops
== &macvlan_link_ops
) {
442 lowerdev
->netdev_ops
->ndo_dfwd_add_station(lowerdev
, dev
);
444 /* If we get a NULL pointer back, or if we get an error
445 * then we should just fall through to the non accelerated path
447 if (IS_ERR_OR_NULL(vlan
->fwd_priv
)) {
448 vlan
->fwd_priv
= NULL
;
454 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
457 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
460 if (dev
->flags
& IFF_ALLMULTI
) {
461 err
= dev_set_allmulti(lowerdev
, 1);
467 macvlan_hash_add(vlan
);
471 dev_uc_del(lowerdev
, dev
->dev_addr
);
473 if (vlan
->fwd_priv
) {
474 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
476 vlan
->fwd_priv
= NULL
;
481 static int macvlan_stop(struct net_device
*dev
)
483 struct macvlan_dev
*vlan
= netdev_priv(dev
);
484 struct net_device
*lowerdev
= vlan
->lowerdev
;
486 if (vlan
->fwd_priv
) {
487 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
489 vlan
->fwd_priv
= NULL
;
493 dev_uc_unsync(lowerdev
, dev
);
494 dev_mc_unsync(lowerdev
, dev
);
496 if (vlan
->port
->passthru
) {
497 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
498 dev_set_promiscuity(lowerdev
, -1);
502 if (dev
->flags
& IFF_ALLMULTI
)
503 dev_set_allmulti(lowerdev
, -1);
505 dev_uc_del(lowerdev
, dev
->dev_addr
);
508 macvlan_hash_del(vlan
, !dev
->dismantle
);
512 static int macvlan_sync_address(struct net_device
*dev
, unsigned char *addr
)
514 struct macvlan_dev
*vlan
= netdev_priv(dev
);
515 struct net_device
*lowerdev
= vlan
->lowerdev
;
518 if (!(dev
->flags
& IFF_UP
)) {
519 /* Just copy in the new address */
520 ether_addr_copy(dev
->dev_addr
, addr
);
522 /* Rehash and update the device filters */
523 if (macvlan_addr_busy(vlan
->port
, addr
))
526 if (!vlan
->port
->passthru
) {
527 err
= dev_uc_add(lowerdev
, addr
);
531 dev_uc_del(lowerdev
, dev
->dev_addr
);
534 macvlan_hash_change_addr(vlan
, addr
);
539 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
541 struct macvlan_dev
*vlan
= netdev_priv(dev
);
542 struct sockaddr
*addr
= p
;
544 if (!is_valid_ether_addr(addr
->sa_data
))
545 return -EADDRNOTAVAIL
;
547 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
548 dev_set_mac_address(vlan
->lowerdev
, addr
);
552 return macvlan_sync_address(dev
, addr
->sa_data
);
555 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
557 struct macvlan_dev
*vlan
= netdev_priv(dev
);
558 struct net_device
*lowerdev
= vlan
->lowerdev
;
560 if (dev
->flags
& IFF_UP
) {
561 if (change
& IFF_ALLMULTI
)
562 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
566 static void macvlan_set_mac_lists(struct net_device
*dev
)
568 struct macvlan_dev
*vlan
= netdev_priv(dev
);
570 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
571 bitmap_fill(vlan
->mc_filter
, MACVLAN_MC_FILTER_SZ
);
573 struct netdev_hw_addr
*ha
;
574 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
576 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
577 netdev_for_each_mc_addr(ha
, dev
) {
578 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
581 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
583 bitmap_copy(vlan
->mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
585 dev_uc_sync(vlan
->lowerdev
, dev
);
586 dev_mc_sync(vlan
->lowerdev
, dev
);
589 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
591 struct macvlan_dev
*vlan
= netdev_priv(dev
);
593 if (new_mtu
< 68 || vlan
->lowerdev
->mtu
< new_mtu
)
600 * macvlan network devices have devices nesting below it and are a special
601 * "super class" of normal network devices; split their locks off into a
602 * separate class since they always nest.
604 static struct lock_class_key macvlan_netdev_xmit_lock_key
;
605 static struct lock_class_key macvlan_netdev_addr_lock_key
;
607 #define ALWAYS_ON_FEATURES \
608 (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX)
610 #define MACVLAN_FEATURES \
611 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
612 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
613 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
614 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
616 #define MACVLAN_STATE_MASK \
617 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
619 static int macvlan_get_nest_level(struct net_device
*dev
)
621 return ((struct macvlan_dev
*)netdev_priv(dev
))->nest_level
;
624 static void macvlan_set_lockdep_class_one(struct net_device
*dev
,
625 struct netdev_queue
*txq
,
628 lockdep_set_class(&txq
->_xmit_lock
,
629 &macvlan_netdev_xmit_lock_key
);
632 static void macvlan_set_lockdep_class(struct net_device
*dev
)
634 lockdep_set_class_and_subclass(&dev
->addr_list_lock
,
635 &macvlan_netdev_addr_lock_key
,
636 macvlan_get_nest_level(dev
));
637 netdev_for_each_tx_queue(dev
, macvlan_set_lockdep_class_one
, NULL
);
640 static int macvlan_init(struct net_device
*dev
)
642 struct macvlan_dev
*vlan
= netdev_priv(dev
);
643 const struct net_device
*lowerdev
= vlan
->lowerdev
;
645 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
646 (lowerdev
->state
& MACVLAN_STATE_MASK
);
647 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
648 dev
->features
|= ALWAYS_ON_FEATURES
;
649 dev
->gso_max_size
= lowerdev
->gso_max_size
;
650 dev
->iflink
= lowerdev
->ifindex
;
651 dev
->hard_header_len
= lowerdev
->hard_header_len
;
653 macvlan_set_lockdep_class(dev
);
655 vlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct vlan_pcpu_stats
);
656 if (!vlan
->pcpu_stats
)
662 static void macvlan_uninit(struct net_device
*dev
)
664 struct macvlan_dev
*vlan
= netdev_priv(dev
);
665 struct macvlan_port
*port
= vlan
->port
;
667 free_percpu(vlan
->pcpu_stats
);
669 if (MACVLAN_PORT_IS_EMPTY(port
))
670 macvlan_port_destroy(port
->dev
);
673 static struct rtnl_link_stats64
*macvlan_dev_get_stats64(struct net_device
*dev
,
674 struct rtnl_link_stats64
*stats
)
676 struct macvlan_dev
*vlan
= netdev_priv(dev
);
678 if (vlan
->pcpu_stats
) {
679 struct vlan_pcpu_stats
*p
;
680 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
681 u32 rx_errors
= 0, tx_dropped
= 0;
685 for_each_possible_cpu(i
) {
686 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
688 start
= u64_stats_fetch_begin_irq(&p
->syncp
);
689 rx_packets
= p
->rx_packets
;
690 rx_bytes
= p
->rx_bytes
;
691 rx_multicast
= p
->rx_multicast
;
692 tx_packets
= p
->tx_packets
;
693 tx_bytes
= p
->tx_bytes
;
694 } while (u64_stats_fetch_retry_irq(&p
->syncp
, start
));
696 stats
->rx_packets
+= rx_packets
;
697 stats
->rx_bytes
+= rx_bytes
;
698 stats
->multicast
+= rx_multicast
;
699 stats
->tx_packets
+= tx_packets
;
700 stats
->tx_bytes
+= tx_bytes
;
701 /* rx_errors & tx_dropped are u32, updated
702 * without syncp protection.
704 rx_errors
+= p
->rx_errors
;
705 tx_dropped
+= p
->tx_dropped
;
707 stats
->rx_errors
= rx_errors
;
708 stats
->rx_dropped
= rx_errors
;
709 stats
->tx_dropped
= tx_dropped
;
714 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
715 __be16 proto
, u16 vid
)
717 struct macvlan_dev
*vlan
= netdev_priv(dev
);
718 struct net_device
*lowerdev
= vlan
->lowerdev
;
720 return vlan_vid_add(lowerdev
, proto
, vid
);
723 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
724 __be16 proto
, u16 vid
)
726 struct macvlan_dev
*vlan
= netdev_priv(dev
);
727 struct net_device
*lowerdev
= vlan
->lowerdev
;
729 vlan_vid_del(lowerdev
, proto
, vid
);
733 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
734 struct net_device
*dev
,
735 const unsigned char *addr
,
738 struct macvlan_dev
*vlan
= netdev_priv(dev
);
741 if (!vlan
->port
->passthru
)
744 if (flags
& NLM_F_REPLACE
)
747 if (is_unicast_ether_addr(addr
))
748 err
= dev_uc_add_excl(dev
, addr
);
749 else if (is_multicast_ether_addr(addr
))
750 err
= dev_mc_add_excl(dev
, addr
);
755 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
756 struct net_device
*dev
,
757 const unsigned char *addr
)
759 struct macvlan_dev
*vlan
= netdev_priv(dev
);
762 if (!vlan
->port
->passthru
)
765 if (is_unicast_ether_addr(addr
))
766 err
= dev_uc_del(dev
, addr
);
767 else if (is_multicast_ether_addr(addr
))
768 err
= dev_mc_del(dev
, addr
);
773 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
774 struct ethtool_drvinfo
*drvinfo
)
776 strlcpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
777 strlcpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
780 static int macvlan_ethtool_get_settings(struct net_device
*dev
,
781 struct ethtool_cmd
*cmd
)
783 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
785 return __ethtool_get_settings(vlan
->lowerdev
, cmd
);
788 static netdev_features_t
macvlan_fix_features(struct net_device
*dev
,
789 netdev_features_t features
)
791 struct macvlan_dev
*vlan
= netdev_priv(dev
);
792 netdev_features_t mask
;
794 features
|= NETIF_F_ALL_FOR_ALL
;
795 features
&= (vlan
->set_features
| ~MACVLAN_FEATURES
);
798 features
= netdev_increment_features(vlan
->lowerdev
->features
,
801 features
|= ALWAYS_ON_FEATURES
;
806 #ifdef CONFIG_NET_POLL_CONTROLLER
807 static void macvlan_dev_poll_controller(struct net_device
*dev
)
812 static int macvlan_dev_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*npinfo
)
814 struct macvlan_dev
*vlan
= netdev_priv(dev
);
815 struct net_device
*real_dev
= vlan
->lowerdev
;
816 struct netpoll
*netpoll
;
819 netpoll
= kzalloc(sizeof(*netpoll
), GFP_KERNEL
);
824 err
= __netpoll_setup(netpoll
, real_dev
);
830 vlan
->netpoll
= netpoll
;
836 static void macvlan_dev_netpoll_cleanup(struct net_device
*dev
)
838 struct macvlan_dev
*vlan
= netdev_priv(dev
);
839 struct netpoll
*netpoll
= vlan
->netpoll
;
844 vlan
->netpoll
= NULL
;
846 __netpoll_free_async(netpoll
);
848 #endif /* CONFIG_NET_POLL_CONTROLLER */
850 static const struct ethtool_ops macvlan_ethtool_ops
= {
851 .get_link
= ethtool_op_get_link
,
852 .get_settings
= macvlan_ethtool_get_settings
,
853 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
856 static const struct net_device_ops macvlan_netdev_ops
= {
857 .ndo_init
= macvlan_init
,
858 .ndo_uninit
= macvlan_uninit
,
859 .ndo_open
= macvlan_open
,
860 .ndo_stop
= macvlan_stop
,
861 .ndo_start_xmit
= macvlan_start_xmit
,
862 .ndo_change_mtu
= macvlan_change_mtu
,
863 .ndo_fix_features
= macvlan_fix_features
,
864 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
865 .ndo_set_mac_address
= macvlan_set_mac_address
,
866 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
867 .ndo_get_stats64
= macvlan_dev_get_stats64
,
868 .ndo_validate_addr
= eth_validate_addr
,
869 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
870 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
871 .ndo_fdb_add
= macvlan_fdb_add
,
872 .ndo_fdb_del
= macvlan_fdb_del
,
873 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
874 .ndo_get_lock_subclass
= macvlan_get_nest_level
,
875 #ifdef CONFIG_NET_POLL_CONTROLLER
876 .ndo_poll_controller
= macvlan_dev_poll_controller
,
877 .ndo_netpoll_setup
= macvlan_dev_netpoll_setup
,
878 .ndo_netpoll_cleanup
= macvlan_dev_netpoll_cleanup
,
882 void macvlan_common_setup(struct net_device
*dev
)
886 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
887 dev
->priv_flags
|= IFF_UNICAST_FLT
;
888 dev
->netdev_ops
= &macvlan_netdev_ops
;
889 dev
->destructor
= free_netdev
;
890 dev
->header_ops
= &macvlan_hard_header_ops
;
891 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
893 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
895 static void macvlan_setup(struct net_device
*dev
)
897 macvlan_common_setup(dev
);
898 dev
->tx_queue_len
= 0;
901 static int macvlan_port_create(struct net_device
*dev
)
903 struct macvlan_port
*port
;
907 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
910 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
914 port
->passthru
= false;
916 INIT_LIST_HEAD(&port
->vlans
);
917 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
918 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
920 skb_queue_head_init(&port
->bc_queue
);
921 INIT_WORK(&port
->bc_work
, macvlan_process_broadcast
);
923 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
927 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
931 static void macvlan_port_destroy(struct net_device
*dev
)
933 struct macvlan_port
*port
= macvlan_port_get_rtnl(dev
);
935 cancel_work_sync(&port
->bc_work
);
936 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
937 netdev_rx_handler_unregister(dev
);
938 kfree_rcu(port
, rcu
);
941 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
943 if (tb
[IFLA_ADDRESS
]) {
944 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
946 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
947 return -EADDRNOTAVAIL
;
950 if (data
&& data
[IFLA_MACVLAN_FLAGS
] &&
951 nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]) & ~MACVLAN_FLAG_NOPROMISC
)
954 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
955 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
956 case MACVLAN_MODE_PRIVATE
:
957 case MACVLAN_MODE_VEPA
:
958 case MACVLAN_MODE_BRIDGE
:
959 case MACVLAN_MODE_PASSTHRU
:
968 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
969 struct nlattr
*tb
[], struct nlattr
*data
[])
971 struct macvlan_dev
*vlan
= netdev_priv(dev
);
972 struct macvlan_port
*port
;
973 struct net_device
*lowerdev
;
979 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
980 if (lowerdev
== NULL
)
983 /* When creating macvlans or macvtaps on top of other macvlans - use
984 * the real device as the lowerdev.
986 if (netif_is_macvlan(lowerdev
))
987 lowerdev
= macvlan_dev_real_dev(lowerdev
);
990 dev
->mtu
= lowerdev
->mtu
;
991 else if (dev
->mtu
> lowerdev
->mtu
)
994 if (!tb
[IFLA_ADDRESS
])
995 eth_hw_addr_random(dev
);
997 if (!macvlan_port_exists(lowerdev
)) {
998 err
= macvlan_port_create(lowerdev
);
1002 port
= macvlan_port_get_rtnl(lowerdev
);
1004 /* Only 1 macvlan device can be created in passthru mode */
1008 vlan
->lowerdev
= lowerdev
;
1011 vlan
->set_features
= MACVLAN_FEATURES
;
1012 vlan
->nest_level
= dev_get_nest_level(lowerdev
, netif_is_macvlan
) + 1;
1014 vlan
->mode
= MACVLAN_MODE_VEPA
;
1015 if (data
&& data
[IFLA_MACVLAN_MODE
])
1016 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1018 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
1019 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1021 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
1022 if (!MACVLAN_PORT_IS_EMPTY(port
))
1024 port
->passthru
= true;
1025 eth_hw_addr_inherit(dev
, lowerdev
);
1028 err
= register_netdevice(dev
);
1032 dev
->priv_flags
|= IFF_MACVLAN
;
1033 err
= netdev_upper_dev_link(lowerdev
, dev
);
1035 goto unregister_netdev
;
1037 list_add_tail_rcu(&vlan
->list
, &port
->vlans
);
1038 netif_stacked_transfer_operstate(lowerdev
, dev
);
1043 unregister_netdevice(dev
);
1045 if (MACVLAN_PORT_IS_EMPTY(port
))
1046 macvlan_port_destroy(lowerdev
);
1050 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
1052 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
1053 struct nlattr
*tb
[], struct nlattr
*data
[])
1055 return macvlan_common_newlink(src_net
, dev
, tb
, data
);
1058 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
1060 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1062 list_del_rcu(&vlan
->list
);
1063 unregister_netdevice_queue(dev
, head
);
1064 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
1066 EXPORT_SYMBOL_GPL(macvlan_dellink
);
1068 static int macvlan_changelink(struct net_device
*dev
,
1069 struct nlattr
*tb
[], struct nlattr
*data
[])
1071 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1072 enum macvlan_mode mode
;
1073 bool set_mode
= false;
1075 /* Validate mode, but don't set yet: setting flags may fail. */
1076 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1078 mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1079 /* Passthrough mode can't be set or cleared dynamically */
1080 if ((mode
== MACVLAN_MODE_PASSTHRU
) !=
1081 (vlan
->mode
== MACVLAN_MODE_PASSTHRU
))
1085 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
1086 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1087 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
1088 if (vlan
->port
->passthru
&& promisc
) {
1091 if (flags
& MACVLAN_FLAG_NOPROMISC
)
1092 err
= dev_set_promiscuity(vlan
->lowerdev
, -1);
1094 err
= dev_set_promiscuity(vlan
->lowerdev
, 1);
1098 vlan
->flags
= flags
;
1105 static size_t macvlan_get_size(const struct net_device
*dev
)
1108 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1109 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1113 static int macvlan_fill_info(struct sk_buff
*skb
,
1114 const struct net_device
*dev
)
1116 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1118 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
1119 goto nla_put_failure
;
1120 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
1121 goto nla_put_failure
;
1128 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
1129 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
1130 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
1133 int macvlan_link_register(struct rtnl_link_ops
*ops
)
1136 ops
->priv_size
= sizeof(struct macvlan_dev
);
1137 ops
->validate
= macvlan_validate
;
1138 ops
->maxtype
= IFLA_MACVLAN_MAX
;
1139 ops
->policy
= macvlan_policy
;
1140 ops
->changelink
= macvlan_changelink
;
1141 ops
->get_size
= macvlan_get_size
;
1142 ops
->fill_info
= macvlan_fill_info
;
1144 return rtnl_link_register(ops
);
1146 EXPORT_SYMBOL_GPL(macvlan_link_register
);
1148 static struct rtnl_link_ops macvlan_link_ops
= {
1150 .setup
= macvlan_setup
,
1151 .newlink
= macvlan_newlink
,
1152 .dellink
= macvlan_dellink
,
1155 static int macvlan_device_event(struct notifier_block
*unused
,
1156 unsigned long event
, void *ptr
)
1158 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1159 struct macvlan_dev
*vlan
, *next
;
1160 struct macvlan_port
*port
;
1161 LIST_HEAD(list_kill
);
1163 if (!macvlan_port_exists(dev
))
1166 port
= macvlan_port_get_rtnl(dev
);
1170 list_for_each_entry(vlan
, &port
->vlans
, list
)
1171 netif_stacked_transfer_operstate(vlan
->lowerdev
,
1174 case NETDEV_FEAT_CHANGE
:
1175 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1176 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
1177 netdev_update_features(vlan
->dev
);
1180 case NETDEV_CHANGEMTU
:
1181 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1182 if (vlan
->dev
->mtu
<= dev
->mtu
)
1184 dev_set_mtu(vlan
->dev
, dev
->mtu
);
1187 case NETDEV_CHANGEADDR
:
1188 if (!port
->passthru
)
1191 vlan
= list_first_entry_or_null(&port
->vlans
,
1195 if (macvlan_sync_address(vlan
->dev
, dev
->dev_addr
))
1199 case NETDEV_UNREGISTER
:
1200 /* twiddle thumbs on netns device moves */
1201 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
1204 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
1205 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
1206 unregister_netdevice_many(&list_kill
);
1208 case NETDEV_PRE_TYPE_CHANGE
:
1209 /* Forbid underlaying device to change its type. */
1212 case NETDEV_NOTIFY_PEERS
:
1213 case NETDEV_BONDING_FAILOVER
:
1214 case NETDEV_RESEND_IGMP
:
1215 /* Propagate to all vlans */
1216 list_for_each_entry(vlan
, &port
->vlans
, list
)
1217 call_netdevice_notifiers(event
, vlan
->dev
);
1222 static struct notifier_block macvlan_notifier_block __read_mostly
= {
1223 .notifier_call
= macvlan_device_event
,
1226 static int __init
macvlan_init_module(void)
1230 register_netdevice_notifier(&macvlan_notifier_block
);
1232 err
= macvlan_link_register(&macvlan_link_ops
);
1237 unregister_netdevice_notifier(&macvlan_notifier_block
);
1241 static void __exit
macvlan_cleanup_module(void)
1243 rtnl_link_unregister(&macvlan_link_ops
);
1244 unregister_netdevice_notifier(&macvlan_notifier_block
);
1247 module_init(macvlan_init_module
);
1248 module_exit(macvlan_cleanup_module
);
1250 MODULE_LICENSE("GPL");
1251 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1252 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1253 MODULE_ALIAS_RTNL_LINK("macvlan");