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_BITS 8
39 #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS)
40 #define MACVLAN_BC_QUEUE_LEN 1000
42 #define MACVLAN_F_PASSTHRU 1
43 #define MACVLAN_F_ADDRCHANGE 2
46 struct net_device
*dev
;
47 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
48 struct list_head vlans
;
49 struct sk_buff_head bc_queue
;
50 struct work_struct bc_work
;
53 struct hlist_head vlan_source_hash
[MACVLAN_HASH_SIZE
];
54 DECLARE_BITMAP(mc_filter
, MACVLAN_MC_FILTER_SZ
);
55 unsigned char perm_addr
[ETH_ALEN
];
58 struct macvlan_source_entry
{
59 struct hlist_node hlist
;
60 struct macvlan_dev
*vlan
;
61 unsigned char addr
[6+2] __aligned(sizeof(u16
));
65 struct macvlan_skb_cb
{
66 const struct macvlan_dev
*src
;
69 #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
71 static void macvlan_port_destroy(struct net_device
*dev
);
73 static inline bool macvlan_passthru(const struct macvlan_port
*port
)
75 return port
->flags
& MACVLAN_F_PASSTHRU
;
78 static inline void macvlan_set_passthru(struct macvlan_port
*port
)
80 port
->flags
|= MACVLAN_F_PASSTHRU
;
83 static inline bool macvlan_addr_change(const struct macvlan_port
*port
)
85 return port
->flags
& MACVLAN_F_ADDRCHANGE
;
88 static inline void macvlan_set_addr_change(struct macvlan_port
*port
)
90 port
->flags
|= MACVLAN_F_ADDRCHANGE
;
93 static inline void macvlan_clear_addr_change(struct macvlan_port
*port
)
95 port
->flags
&= ~MACVLAN_F_ADDRCHANGE
;
98 /* Hash Ethernet address */
99 static u32
macvlan_eth_hash(const unsigned char *addr
)
101 u64 value
= get_unaligned((u64
*)addr
);
103 /* only want 6 bytes */
109 return hash_64(value
, MACVLAN_HASH_BITS
);
112 static struct macvlan_port
*macvlan_port_get_rcu(const struct net_device
*dev
)
114 return rcu_dereference(dev
->rx_handler_data
);
117 static struct macvlan_port
*macvlan_port_get_rtnl(const struct net_device
*dev
)
119 return rtnl_dereference(dev
->rx_handler_data
);
122 #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
124 static struct macvlan_dev
*macvlan_hash_lookup(const struct macvlan_port
*port
,
125 const unsigned char *addr
)
127 struct macvlan_dev
*vlan
;
128 u32 idx
= macvlan_eth_hash(addr
);
130 hlist_for_each_entry_rcu(vlan
, &port
->vlan_hash
[idx
], hlist
) {
131 if (ether_addr_equal_64bits(vlan
->dev
->dev_addr
, addr
))
137 static struct macvlan_source_entry
*macvlan_hash_lookup_source(
138 const struct macvlan_dev
*vlan
,
139 const unsigned char *addr
)
141 struct macvlan_source_entry
*entry
;
142 u32 idx
= macvlan_eth_hash(addr
);
143 struct hlist_head
*h
= &vlan
->port
->vlan_source_hash
[idx
];
145 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
146 if (ether_addr_equal_64bits(entry
->addr
, addr
) &&
153 static int macvlan_hash_add_source(struct macvlan_dev
*vlan
,
154 const unsigned char *addr
)
156 struct macvlan_port
*port
= vlan
->port
;
157 struct macvlan_source_entry
*entry
;
158 struct hlist_head
*h
;
160 entry
= macvlan_hash_lookup_source(vlan
, addr
);
164 entry
= kmalloc(sizeof(*entry
), GFP_KERNEL
);
168 ether_addr_copy(entry
->addr
, addr
);
170 h
= &port
->vlan_source_hash
[macvlan_eth_hash(addr
)];
171 hlist_add_head_rcu(&entry
->hlist
, h
);
172 vlan
->macaddr_count
++;
177 static void macvlan_hash_add(struct macvlan_dev
*vlan
)
179 struct macvlan_port
*port
= vlan
->port
;
180 const unsigned char *addr
= vlan
->dev
->dev_addr
;
181 u32 idx
= macvlan_eth_hash(addr
);
183 hlist_add_head_rcu(&vlan
->hlist
, &port
->vlan_hash
[idx
]);
186 static void macvlan_hash_del_source(struct macvlan_source_entry
*entry
)
188 hlist_del_rcu(&entry
->hlist
);
189 kfree_rcu(entry
, rcu
);
192 static void macvlan_hash_del(struct macvlan_dev
*vlan
, bool sync
)
194 hlist_del_rcu(&vlan
->hlist
);
199 static void macvlan_hash_change_addr(struct macvlan_dev
*vlan
,
200 const unsigned char *addr
)
202 macvlan_hash_del(vlan
, true);
203 /* Now that we are unhashed it is safe to change the device
204 * address without confusing packet delivery.
206 memcpy(vlan
->dev
->dev_addr
, addr
, ETH_ALEN
);
207 macvlan_hash_add(vlan
);
210 static bool macvlan_addr_busy(const struct macvlan_port
*port
,
211 const unsigned char *addr
)
213 /* Test to see if the specified address is
214 * currently in use by the underlying device or
217 if (!macvlan_passthru(port
) && !macvlan_addr_change(port
) &&
218 ether_addr_equal_64bits(port
->dev
->dev_addr
, addr
))
221 if (macvlan_hash_lookup(port
, addr
))
228 static int macvlan_broadcast_one(struct sk_buff
*skb
,
229 const struct macvlan_dev
*vlan
,
230 const struct ethhdr
*eth
, bool local
)
232 struct net_device
*dev
= vlan
->dev
;
235 return __dev_forward_skb(dev
, skb
);
238 if (ether_addr_equal_64bits(eth
->h_dest
, dev
->broadcast
))
239 skb
->pkt_type
= PACKET_BROADCAST
;
241 skb
->pkt_type
= PACKET_MULTICAST
;
246 static u32
macvlan_hash_mix(const struct macvlan_dev
*vlan
)
248 return (u32
)(((unsigned long)vlan
) >> L1_CACHE_SHIFT
);
252 static unsigned int mc_hash(const struct macvlan_dev
*vlan
,
253 const unsigned char *addr
)
255 u32 val
= __get_unaligned_cpu32(addr
+ 2);
257 val
^= macvlan_hash_mix(vlan
);
258 return hash_32(val
, MACVLAN_MC_FILTER_BITS
);
261 static void macvlan_broadcast(struct sk_buff
*skb
,
262 const struct macvlan_port
*port
,
263 struct net_device
*src
,
264 enum macvlan_mode mode
)
266 const struct ethhdr
*eth
= eth_hdr(skb
);
267 const struct macvlan_dev
*vlan
;
268 struct sk_buff
*nskb
;
273 if (skb
->protocol
== htons(ETH_P_PAUSE
))
276 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
277 hlist_for_each_entry_rcu(vlan
, &port
->vlan_hash
[i
], hlist
) {
278 if (vlan
->dev
== src
|| !(vlan
->mode
& mode
))
281 hash
= mc_hash(vlan
, eth
->h_dest
);
282 if (!test_bit(hash
, vlan
->mc_filter
))
286 nskb
= skb_clone(skb
, GFP_ATOMIC
);
288 err
= macvlan_broadcast_one(
290 mode
== MACVLAN_MODE_BRIDGE
) ?:
292 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
293 err
== NET_RX_SUCCESS
, true);
298 static void macvlan_process_broadcast(struct work_struct
*w
)
300 struct macvlan_port
*port
= container_of(w
, struct macvlan_port
,
303 struct sk_buff_head list
;
305 __skb_queue_head_init(&list
);
307 spin_lock_bh(&port
->bc_queue
.lock
);
308 skb_queue_splice_tail_init(&port
->bc_queue
, &list
);
309 spin_unlock_bh(&port
->bc_queue
.lock
);
311 while ((skb
= __skb_dequeue(&list
))) {
312 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
317 /* frame comes from an external address */
318 macvlan_broadcast(skb
, port
, NULL
,
319 MACVLAN_MODE_PRIVATE
|
321 MACVLAN_MODE_PASSTHRU
|
322 MACVLAN_MODE_BRIDGE
);
323 else if (src
->mode
== MACVLAN_MODE_VEPA
)
324 /* flood to everyone except source */
325 macvlan_broadcast(skb
, port
, src
->dev
,
327 MACVLAN_MODE_BRIDGE
);
330 * flood only to VEPA ports, bridge ports
331 * already saw the frame on the way out.
333 macvlan_broadcast(skb
, port
, src
->dev
,
344 static void macvlan_broadcast_enqueue(struct macvlan_port
*port
,
345 const struct macvlan_dev
*src
,
348 struct sk_buff
*nskb
;
351 nskb
= skb_clone(skb
, GFP_ATOMIC
);
355 MACVLAN_SKB_CB(nskb
)->src
= src
;
357 spin_lock(&port
->bc_queue
.lock
);
358 if (skb_queue_len(&port
->bc_queue
) < MACVLAN_BC_QUEUE_LEN
) {
361 __skb_queue_tail(&port
->bc_queue
, nskb
);
364 spin_unlock(&port
->bc_queue
.lock
);
369 schedule_work(&port
->bc_work
);
375 atomic_long_inc(&skb
->dev
->rx_dropped
);
378 static void macvlan_flush_sources(struct macvlan_port
*port
,
379 struct macvlan_dev
*vlan
)
383 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
384 struct hlist_node
*h
, *n
;
386 hlist_for_each_safe(h
, n
, &port
->vlan_source_hash
[i
]) {
387 struct macvlan_source_entry
*entry
;
389 entry
= hlist_entry(h
, struct macvlan_source_entry
,
391 if (entry
->vlan
== vlan
)
392 macvlan_hash_del_source(entry
);
395 vlan
->macaddr_count
= 0;
398 static void macvlan_forward_source_one(struct sk_buff
*skb
,
399 struct macvlan_dev
*vlan
)
401 struct sk_buff
*nskb
;
402 struct net_device
*dev
;
407 if (unlikely(!(dev
->flags
& IFF_UP
)))
410 nskb
= skb_clone(skb
, GFP_ATOMIC
);
414 len
= nskb
->len
+ ETH_HLEN
;
416 nskb
->pkt_type
= PACKET_HOST
;
418 ret
= netif_rx(nskb
);
419 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, false);
422 static void macvlan_forward_source(struct sk_buff
*skb
,
423 struct macvlan_port
*port
,
424 const unsigned char *addr
)
426 struct macvlan_source_entry
*entry
;
427 u32 idx
= macvlan_eth_hash(addr
);
428 struct hlist_head
*h
= &port
->vlan_source_hash
[idx
];
430 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
431 if (ether_addr_equal_64bits(entry
->addr
, addr
))
432 macvlan_forward_source_one(skb
, entry
->vlan
);
436 /* called under rcu_read_lock() from netif_receive_skb */
437 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
439 struct macvlan_port
*port
;
440 struct sk_buff
*skb
= *pskb
;
441 const struct ethhdr
*eth
= eth_hdr(skb
);
442 const struct macvlan_dev
*vlan
;
443 const struct macvlan_dev
*src
;
444 struct net_device
*dev
;
445 unsigned int len
= 0;
447 rx_handler_result_t handle_res
;
449 port
= macvlan_port_get_rcu(skb
->dev
);
450 if (is_multicast_ether_addr(eth
->h_dest
)) {
453 skb
= ip_check_defrag(dev_net(skb
->dev
), skb
, IP_DEFRAG_MACVLAN
);
455 return RX_HANDLER_CONSUMED
;
458 macvlan_forward_source(skb
, port
, eth
->h_source
);
459 src
= macvlan_hash_lookup(port
, eth
->h_source
);
460 if (src
&& src
->mode
!= MACVLAN_MODE_VEPA
&&
461 src
->mode
!= MACVLAN_MODE_BRIDGE
) {
462 /* forward to original port. */
464 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0) ?:
466 handle_res
= RX_HANDLER_CONSUMED
;
470 hash
= mc_hash(NULL
, eth
->h_dest
);
471 if (test_bit(hash
, port
->mc_filter
))
472 macvlan_broadcast_enqueue(port
, src
, skb
);
474 return RX_HANDLER_PASS
;
477 macvlan_forward_source(skb
, port
, eth
->h_source
);
478 if (macvlan_passthru(port
))
479 vlan
= list_first_or_null_rcu(&port
->vlans
,
480 struct macvlan_dev
, list
);
482 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
484 return RX_HANDLER_PASS
;
487 if (unlikely(!(dev
->flags
& IFF_UP
))) {
489 return RX_HANDLER_CONSUMED
;
491 len
= skb
->len
+ ETH_HLEN
;
492 skb
= skb_share_check(skb
, GFP_ATOMIC
);
495 handle_res
= RX_HANDLER_CONSUMED
;
501 skb
->pkt_type
= PACKET_HOST
;
503 ret
= NET_RX_SUCCESS
;
504 handle_res
= RX_HANDLER_ANOTHER
;
506 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, false);
510 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
512 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
513 const struct macvlan_port
*port
= vlan
->port
;
514 const struct macvlan_dev
*dest
;
516 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
517 const struct ethhdr
*eth
= (void *)skb
->data
;
519 /* send to other bridge ports directly */
520 if (is_multicast_ether_addr(eth
->h_dest
)) {
521 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
525 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
526 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
527 /* send to lowerdev first for its network taps */
528 dev_forward_skb(vlan
->lowerdev
, skb
);
530 return NET_XMIT_SUCCESS
;
535 skb
->dev
= vlan
->lowerdev
;
536 return dev_queue_xmit(skb
);
539 static inline netdev_tx_t
macvlan_netpoll_send_skb(struct macvlan_dev
*vlan
, struct sk_buff
*skb
)
541 #ifdef CONFIG_NET_POLL_CONTROLLER
543 netpoll_send_skb(vlan
->netpoll
, skb
);
550 static netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
551 struct net_device
*dev
)
553 unsigned int len
= skb
->len
;
555 struct macvlan_dev
*vlan
= netdev_priv(dev
);
557 if (unlikely(netpoll_tx_running(dev
)))
558 return macvlan_netpoll_send_skb(vlan
, skb
);
560 if (vlan
->fwd_priv
) {
561 skb
->dev
= vlan
->lowerdev
;
562 ret
= dev_queue_xmit_accel(skb
, vlan
->fwd_priv
);
564 ret
= macvlan_queue_xmit(skb
, dev
);
567 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
568 struct vlan_pcpu_stats
*pcpu_stats
;
570 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
571 u64_stats_update_begin(&pcpu_stats
->syncp
);
572 pcpu_stats
->tx_packets
++;
573 pcpu_stats
->tx_bytes
+= len
;
574 u64_stats_update_end(&pcpu_stats
->syncp
);
576 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
581 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
582 unsigned short type
, const void *daddr
,
583 const void *saddr
, unsigned len
)
585 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
586 struct net_device
*lowerdev
= vlan
->lowerdev
;
588 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
589 saddr
? : dev
->dev_addr
, len
);
592 static const struct header_ops macvlan_hard_header_ops
= {
593 .create
= macvlan_hard_header
,
594 .parse
= eth_header_parse
,
595 .cache
= eth_header_cache
,
596 .cache_update
= eth_header_cache_update
,
599 static struct rtnl_link_ops macvlan_link_ops
;
601 static int macvlan_open(struct net_device
*dev
)
603 struct macvlan_dev
*vlan
= netdev_priv(dev
);
604 struct net_device
*lowerdev
= vlan
->lowerdev
;
607 if (macvlan_passthru(vlan
->port
)) {
608 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
)) {
609 err
= dev_set_promiscuity(lowerdev
, 1);
616 if (lowerdev
->features
& NETIF_F_HW_L2FW_DOFFLOAD
&&
617 dev
->rtnl_link_ops
== &macvlan_link_ops
) {
619 lowerdev
->netdev_ops
->ndo_dfwd_add_station(lowerdev
, dev
);
621 /* If we get a NULL pointer back, or if we get an error
622 * then we should just fall through to the non accelerated path
624 if (IS_ERR_OR_NULL(vlan
->fwd_priv
)) {
625 vlan
->fwd_priv
= NULL
;
631 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
634 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
637 if (dev
->flags
& IFF_ALLMULTI
) {
638 err
= dev_set_allmulti(lowerdev
, 1);
643 if (dev
->flags
& IFF_PROMISC
) {
644 err
= dev_set_promiscuity(lowerdev
, 1);
650 macvlan_hash_add(vlan
);
654 if (dev
->flags
& IFF_ALLMULTI
)
655 dev_set_allmulti(lowerdev
, -1);
657 dev_uc_del(lowerdev
, dev
->dev_addr
);
659 if (vlan
->fwd_priv
) {
660 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
662 vlan
->fwd_priv
= NULL
;
667 static int macvlan_stop(struct net_device
*dev
)
669 struct macvlan_dev
*vlan
= netdev_priv(dev
);
670 struct net_device
*lowerdev
= vlan
->lowerdev
;
672 if (vlan
->fwd_priv
) {
673 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
675 vlan
->fwd_priv
= NULL
;
679 dev_uc_unsync(lowerdev
, dev
);
680 dev_mc_unsync(lowerdev
, dev
);
682 if (macvlan_passthru(vlan
->port
)) {
683 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
684 dev_set_promiscuity(lowerdev
, -1);
688 if (dev
->flags
& IFF_ALLMULTI
)
689 dev_set_allmulti(lowerdev
, -1);
691 if (dev
->flags
& IFF_PROMISC
)
692 dev_set_promiscuity(lowerdev
, -1);
694 dev_uc_del(lowerdev
, dev
->dev_addr
);
697 macvlan_hash_del(vlan
, !dev
->dismantle
);
701 static int macvlan_sync_address(struct net_device
*dev
, unsigned char *addr
)
703 struct macvlan_dev
*vlan
= netdev_priv(dev
);
704 struct net_device
*lowerdev
= vlan
->lowerdev
;
705 struct macvlan_port
*port
= vlan
->port
;
708 if (!(dev
->flags
& IFF_UP
)) {
709 /* Just copy in the new address */
710 ether_addr_copy(dev
->dev_addr
, addr
);
712 /* Rehash and update the device filters */
713 if (macvlan_addr_busy(vlan
->port
, addr
))
716 if (!macvlan_passthru(port
)) {
717 err
= dev_uc_add(lowerdev
, addr
);
721 dev_uc_del(lowerdev
, dev
->dev_addr
);
724 macvlan_hash_change_addr(vlan
, addr
);
726 if (macvlan_passthru(port
) && !macvlan_addr_change(port
)) {
727 /* Since addr_change isn't set, we are here due to lower
728 * device change. Save the lower-dev address so we can
731 ether_addr_copy(vlan
->port
->perm_addr
,
734 macvlan_clear_addr_change(port
);
738 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
740 struct macvlan_dev
*vlan
= netdev_priv(dev
);
741 struct sockaddr
*addr
= p
;
743 if (!is_valid_ether_addr(addr
->sa_data
))
744 return -EADDRNOTAVAIL
;
746 /* If the addresses are the same, this is a no-op */
747 if (ether_addr_equal(dev
->dev_addr
, addr
->sa_data
))
750 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
751 macvlan_set_addr_change(vlan
->port
);
752 return dev_set_mac_address(vlan
->lowerdev
, addr
);
755 return macvlan_sync_address(dev
, addr
->sa_data
);
758 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
760 struct macvlan_dev
*vlan
= netdev_priv(dev
);
761 struct net_device
*lowerdev
= vlan
->lowerdev
;
763 if (dev
->flags
& IFF_UP
) {
764 if (change
& IFF_ALLMULTI
)
765 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
766 if (change
& IFF_PROMISC
)
767 dev_set_promiscuity(lowerdev
,
768 dev
->flags
& IFF_PROMISC
? 1 : -1);
773 static void macvlan_compute_filter(unsigned long *mc_filter
,
774 struct net_device
*dev
,
775 struct macvlan_dev
*vlan
)
777 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
778 bitmap_fill(mc_filter
, MACVLAN_MC_FILTER_SZ
);
780 struct netdev_hw_addr
*ha
;
781 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
783 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
784 netdev_for_each_mc_addr(ha
, dev
) {
785 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
788 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
790 bitmap_copy(mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
794 static void macvlan_set_mac_lists(struct net_device
*dev
)
796 struct macvlan_dev
*vlan
= netdev_priv(dev
);
798 macvlan_compute_filter(vlan
->mc_filter
, dev
, vlan
);
800 dev_uc_sync(vlan
->lowerdev
, dev
);
801 dev_mc_sync(vlan
->lowerdev
, dev
);
803 /* This is slightly inaccurate as we're including the subscription
804 * list of vlan->lowerdev too.
806 * Bug alert: This only works if everyone has the same broadcast
807 * address as lowerdev. As soon as someone changes theirs this
810 * However, this is already broken as when you change your broadcast
811 * address we don't get called.
813 * The solution is to maintain a list of broadcast addresses like
814 * we do for uc/mc, if you care.
816 macvlan_compute_filter(vlan
->port
->mc_filter
, vlan
->lowerdev
, NULL
);
819 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
821 struct macvlan_dev
*vlan
= netdev_priv(dev
);
823 if (vlan
->lowerdev
->mtu
< new_mtu
)
830 * macvlan network devices have devices nesting below it and are a special
831 * "super class" of normal network devices; split their locks off into a
832 * separate class since they always nest.
834 static struct lock_class_key macvlan_netdev_addr_lock_key
;
836 #define ALWAYS_ON_OFFLOADS \
837 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \
838 NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL)
840 #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX)
842 #define MACVLAN_FEATURES \
843 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
844 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \
845 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
846 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
848 #define MACVLAN_STATE_MASK \
849 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
851 static int macvlan_get_nest_level(struct net_device
*dev
)
853 return ((struct macvlan_dev
*)netdev_priv(dev
))->nest_level
;
856 static void macvlan_set_lockdep_class(struct net_device
*dev
)
858 netdev_lockdep_set_classes(dev
);
859 lockdep_set_class_and_subclass(&dev
->addr_list_lock
,
860 &macvlan_netdev_addr_lock_key
,
861 macvlan_get_nest_level(dev
));
864 static int macvlan_init(struct net_device
*dev
)
866 struct macvlan_dev
*vlan
= netdev_priv(dev
);
867 const struct net_device
*lowerdev
= vlan
->lowerdev
;
868 struct macvlan_port
*port
= vlan
->port
;
870 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
871 (lowerdev
->state
& MACVLAN_STATE_MASK
);
872 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
873 dev
->features
|= ALWAYS_ON_FEATURES
;
874 dev
->hw_features
|= NETIF_F_LRO
;
875 dev
->vlan_features
= lowerdev
->vlan_features
& MACVLAN_FEATURES
;
876 dev
->vlan_features
|= ALWAYS_ON_OFFLOADS
;
877 dev
->hw_enc_features
|= dev
->features
;
878 dev
->gso_max_size
= lowerdev
->gso_max_size
;
879 dev
->gso_max_segs
= lowerdev
->gso_max_segs
;
880 dev
->hard_header_len
= lowerdev
->hard_header_len
;
882 macvlan_set_lockdep_class(dev
);
884 vlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct vlan_pcpu_stats
);
885 if (!vlan
->pcpu_stats
)
893 static void macvlan_uninit(struct net_device
*dev
)
895 struct macvlan_dev
*vlan
= netdev_priv(dev
);
896 struct macvlan_port
*port
= vlan
->port
;
898 free_percpu(vlan
->pcpu_stats
);
900 macvlan_flush_sources(port
, vlan
);
903 macvlan_port_destroy(port
->dev
);
906 static void macvlan_dev_get_stats64(struct net_device
*dev
,
907 struct rtnl_link_stats64
*stats
)
909 struct macvlan_dev
*vlan
= netdev_priv(dev
);
911 if (vlan
->pcpu_stats
) {
912 struct vlan_pcpu_stats
*p
;
913 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
914 u32 rx_errors
= 0, tx_dropped
= 0;
918 for_each_possible_cpu(i
) {
919 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
921 start
= u64_stats_fetch_begin_irq(&p
->syncp
);
922 rx_packets
= p
->rx_packets
;
923 rx_bytes
= p
->rx_bytes
;
924 rx_multicast
= p
->rx_multicast
;
925 tx_packets
= p
->tx_packets
;
926 tx_bytes
= p
->tx_bytes
;
927 } while (u64_stats_fetch_retry_irq(&p
->syncp
, start
));
929 stats
->rx_packets
+= rx_packets
;
930 stats
->rx_bytes
+= rx_bytes
;
931 stats
->multicast
+= rx_multicast
;
932 stats
->tx_packets
+= tx_packets
;
933 stats
->tx_bytes
+= tx_bytes
;
934 /* rx_errors & tx_dropped are u32, updated
935 * without syncp protection.
937 rx_errors
+= p
->rx_errors
;
938 tx_dropped
+= p
->tx_dropped
;
940 stats
->rx_errors
= rx_errors
;
941 stats
->rx_dropped
= rx_errors
;
942 stats
->tx_dropped
= tx_dropped
;
946 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
947 __be16 proto
, u16 vid
)
949 struct macvlan_dev
*vlan
= netdev_priv(dev
);
950 struct net_device
*lowerdev
= vlan
->lowerdev
;
952 return vlan_vid_add(lowerdev
, proto
, vid
);
955 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
956 __be16 proto
, u16 vid
)
958 struct macvlan_dev
*vlan
= netdev_priv(dev
);
959 struct net_device
*lowerdev
= vlan
->lowerdev
;
961 vlan_vid_del(lowerdev
, proto
, vid
);
965 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
966 struct net_device
*dev
,
967 const unsigned char *addr
, u16 vid
,
970 struct macvlan_dev
*vlan
= netdev_priv(dev
);
973 /* Support unicast filter only on passthru devices.
974 * Multicast filter should be allowed on all devices.
976 if (!macvlan_passthru(vlan
->port
) && is_unicast_ether_addr(addr
))
979 if (flags
& NLM_F_REPLACE
)
982 if (is_unicast_ether_addr(addr
))
983 err
= dev_uc_add_excl(dev
, addr
);
984 else if (is_multicast_ether_addr(addr
))
985 err
= dev_mc_add_excl(dev
, addr
);
990 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
991 struct net_device
*dev
,
992 const unsigned char *addr
, u16 vid
)
994 struct macvlan_dev
*vlan
= netdev_priv(dev
);
997 /* Support unicast filter only on passthru devices.
998 * Multicast filter should be allowed on all devices.
1000 if (!macvlan_passthru(vlan
->port
) && is_unicast_ether_addr(addr
))
1003 if (is_unicast_ether_addr(addr
))
1004 err
= dev_uc_del(dev
, addr
);
1005 else if (is_multicast_ether_addr(addr
))
1006 err
= dev_mc_del(dev
, addr
);
1011 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
1012 struct ethtool_drvinfo
*drvinfo
)
1014 strlcpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
1015 strlcpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
1018 static int macvlan_ethtool_get_link_ksettings(struct net_device
*dev
,
1019 struct ethtool_link_ksettings
*cmd
)
1021 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
1023 return __ethtool_get_link_ksettings(vlan
->lowerdev
, cmd
);
1026 static netdev_features_t
macvlan_fix_features(struct net_device
*dev
,
1027 netdev_features_t features
)
1029 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1030 netdev_features_t lowerdev_features
= vlan
->lowerdev
->features
;
1031 netdev_features_t mask
;
1033 features
|= NETIF_F_ALL_FOR_ALL
;
1034 features
&= (vlan
->set_features
| ~MACVLAN_FEATURES
);
1037 lowerdev_features
&= (features
| ~NETIF_F_LRO
);
1038 features
= netdev_increment_features(lowerdev_features
, features
, mask
);
1039 features
|= ALWAYS_ON_FEATURES
;
1040 features
&= ~NETIF_F_NETNS_LOCAL
;
1045 #ifdef CONFIG_NET_POLL_CONTROLLER
1046 static void macvlan_dev_poll_controller(struct net_device
*dev
)
1051 static int macvlan_dev_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*npinfo
)
1053 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1054 struct net_device
*real_dev
= vlan
->lowerdev
;
1055 struct netpoll
*netpoll
;
1058 netpoll
= kzalloc(sizeof(*netpoll
), GFP_KERNEL
);
1063 err
= __netpoll_setup(netpoll
, real_dev
);
1069 vlan
->netpoll
= netpoll
;
1075 static void macvlan_dev_netpoll_cleanup(struct net_device
*dev
)
1077 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1078 struct netpoll
*netpoll
= vlan
->netpoll
;
1083 vlan
->netpoll
= NULL
;
1085 __netpoll_free_async(netpoll
);
1087 #endif /* CONFIG_NET_POLL_CONTROLLER */
1089 static int macvlan_dev_get_iflink(const struct net_device
*dev
)
1091 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1093 return vlan
->lowerdev
->ifindex
;
1096 static const struct ethtool_ops macvlan_ethtool_ops
= {
1097 .get_link
= ethtool_op_get_link
,
1098 .get_link_ksettings
= macvlan_ethtool_get_link_ksettings
,
1099 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
1102 static const struct net_device_ops macvlan_netdev_ops
= {
1103 .ndo_init
= macvlan_init
,
1104 .ndo_uninit
= macvlan_uninit
,
1105 .ndo_open
= macvlan_open
,
1106 .ndo_stop
= macvlan_stop
,
1107 .ndo_start_xmit
= macvlan_start_xmit
,
1108 .ndo_change_mtu
= macvlan_change_mtu
,
1109 .ndo_fix_features
= macvlan_fix_features
,
1110 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
1111 .ndo_set_mac_address
= macvlan_set_mac_address
,
1112 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
1113 .ndo_get_stats64
= macvlan_dev_get_stats64
,
1114 .ndo_validate_addr
= eth_validate_addr
,
1115 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
1116 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
1117 .ndo_fdb_add
= macvlan_fdb_add
,
1118 .ndo_fdb_del
= macvlan_fdb_del
,
1119 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
1120 .ndo_get_lock_subclass
= macvlan_get_nest_level
,
1121 #ifdef CONFIG_NET_POLL_CONTROLLER
1122 .ndo_poll_controller
= macvlan_dev_poll_controller
,
1123 .ndo_netpoll_setup
= macvlan_dev_netpoll_setup
,
1124 .ndo_netpoll_cleanup
= macvlan_dev_netpoll_cleanup
,
1126 .ndo_get_iflink
= macvlan_dev_get_iflink
,
1127 .ndo_features_check
= passthru_features_check
,
1130 void macvlan_common_setup(struct net_device
*dev
)
1135 dev
->max_mtu
= ETH_MAX_MTU
;
1136 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1137 netif_keep_dst(dev
);
1138 dev
->priv_flags
|= IFF_UNICAST_FLT
;
1139 dev
->netdev_ops
= &macvlan_netdev_ops
;
1140 dev
->needs_free_netdev
= true;
1141 dev
->header_ops
= &macvlan_hard_header_ops
;
1142 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
1144 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
1146 static void macvlan_setup(struct net_device
*dev
)
1148 macvlan_common_setup(dev
);
1149 dev
->priv_flags
|= IFF_NO_QUEUE
;
1152 static int macvlan_port_create(struct net_device
*dev
)
1154 struct macvlan_port
*port
;
1158 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
1161 if (netdev_is_rx_handler_busy(dev
))
1164 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
1169 ether_addr_copy(port
->perm_addr
, dev
->dev_addr
);
1170 INIT_LIST_HEAD(&port
->vlans
);
1171 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1172 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
1173 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1174 INIT_HLIST_HEAD(&port
->vlan_source_hash
[i
]);
1176 skb_queue_head_init(&port
->bc_queue
);
1177 INIT_WORK(&port
->bc_work
, macvlan_process_broadcast
);
1179 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
1183 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
1187 static void macvlan_port_destroy(struct net_device
*dev
)
1189 struct macvlan_port
*port
= macvlan_port_get_rtnl(dev
);
1190 struct sk_buff
*skb
;
1192 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
1193 netdev_rx_handler_unregister(dev
);
1195 /* After this point, no packet can schedule bc_work anymore,
1196 * but we need to cancel it and purge left skbs if any.
1198 cancel_work_sync(&port
->bc_work
);
1200 while ((skb
= __skb_dequeue(&port
->bc_queue
))) {
1201 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
1209 /* If the lower device address has been changed by passthru
1210 * macvlan, put it back.
1212 if (macvlan_passthru(port
) &&
1213 !ether_addr_equal(port
->dev
->dev_addr
, port
->perm_addr
)) {
1216 sa
.sa_family
= port
->dev
->type
;
1217 memcpy(&sa
.sa_data
, port
->perm_addr
, port
->dev
->addr_len
);
1218 dev_set_mac_address(port
->dev
, &sa
);
1224 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[],
1225 struct netlink_ext_ack
*extack
)
1227 if (tb
[IFLA_ADDRESS
]) {
1228 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
1230 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
1231 return -EADDRNOTAVAIL
;
1234 if (data
&& data
[IFLA_MACVLAN_FLAGS
] &&
1235 nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]) & ~MACVLAN_FLAG_NOPROMISC
)
1238 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1239 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
1240 case MACVLAN_MODE_PRIVATE
:
1241 case MACVLAN_MODE_VEPA
:
1242 case MACVLAN_MODE_BRIDGE
:
1243 case MACVLAN_MODE_PASSTHRU
:
1244 case MACVLAN_MODE_SOURCE
:
1251 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1252 switch (nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
])) {
1253 case MACVLAN_MACADDR_ADD
:
1254 case MACVLAN_MACADDR_DEL
:
1255 case MACVLAN_MACADDR_FLUSH
:
1256 case MACVLAN_MACADDR_SET
:
1263 if (data
&& data
[IFLA_MACVLAN_MACADDR
]) {
1264 if (nla_len(data
[IFLA_MACVLAN_MACADDR
]) != ETH_ALEN
)
1267 if (!is_valid_ether_addr(nla_data(data
[IFLA_MACVLAN_MACADDR
])))
1268 return -EADDRNOTAVAIL
;
1271 if (data
&& data
[IFLA_MACVLAN_MACADDR_COUNT
])
1278 * reconfigure list of remote source mac address
1279 * (only for macvlan devices in source mode)
1280 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1281 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1283 static int macvlan_changelink_sources(struct macvlan_dev
*vlan
, u32 mode
,
1284 struct nlattr
*data
[])
1288 struct nlattr
*nla
, *head
;
1289 struct macvlan_source_entry
*entry
;
1291 if (data
[IFLA_MACVLAN_MACADDR
])
1292 addr
= nla_data(data
[IFLA_MACVLAN_MACADDR
]);
1294 if (mode
== MACVLAN_MACADDR_ADD
) {
1298 return macvlan_hash_add_source(vlan
, addr
);
1300 } else if (mode
== MACVLAN_MACADDR_DEL
) {
1304 entry
= macvlan_hash_lookup_source(vlan
, addr
);
1306 macvlan_hash_del_source(entry
);
1307 vlan
->macaddr_count
--;
1309 } else if (mode
== MACVLAN_MACADDR_FLUSH
) {
1310 macvlan_flush_sources(vlan
->port
, vlan
);
1311 } else if (mode
== MACVLAN_MACADDR_SET
) {
1312 macvlan_flush_sources(vlan
->port
, vlan
);
1315 ret
= macvlan_hash_add_source(vlan
, addr
);
1320 if (!data
|| !data
[IFLA_MACVLAN_MACADDR_DATA
])
1323 head
= nla_data(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1324 len
= nla_len(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1326 nla_for_each_attr(nla
, head
, len
, rem
) {
1327 if (nla_type(nla
) != IFLA_MACVLAN_MACADDR
||
1328 nla_len(nla
) != ETH_ALEN
)
1331 addr
= nla_data(nla
);
1332 ret
= macvlan_hash_add_source(vlan
, addr
);
1343 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
1344 struct nlattr
*tb
[], struct nlattr
*data
[])
1346 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1347 struct macvlan_port
*port
;
1348 struct net_device
*lowerdev
;
1351 bool create
= false;
1356 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
1357 if (lowerdev
== NULL
)
1360 /* When creating macvlans or macvtaps on top of other macvlans - use
1361 * the real device as the lowerdev.
1363 if (netif_is_macvlan(lowerdev
))
1364 lowerdev
= macvlan_dev_real_dev(lowerdev
);
1367 dev
->mtu
= lowerdev
->mtu
;
1368 else if (dev
->mtu
> lowerdev
->mtu
)
1371 /* MTU range: 68 - lowerdev->max_mtu */
1372 dev
->min_mtu
= ETH_MIN_MTU
;
1373 dev
->max_mtu
= lowerdev
->max_mtu
;
1375 if (!tb
[IFLA_ADDRESS
])
1376 eth_hw_addr_random(dev
);
1378 if (!macvlan_port_exists(lowerdev
)) {
1379 err
= macvlan_port_create(lowerdev
);
1384 port
= macvlan_port_get_rtnl(lowerdev
);
1386 /* Only 1 macvlan device can be created in passthru mode */
1387 if (macvlan_passthru(port
)) {
1388 /* The macvlan port must be not created this time,
1389 * still goto destroy_macvlan_port for readability.
1392 goto destroy_macvlan_port
;
1395 vlan
->lowerdev
= lowerdev
;
1398 vlan
->set_features
= MACVLAN_FEATURES
;
1399 vlan
->nest_level
= dev_get_nest_level(lowerdev
) + 1;
1401 vlan
->mode
= MACVLAN_MODE_VEPA
;
1402 if (data
&& data
[IFLA_MACVLAN_MODE
])
1403 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1405 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
1406 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1408 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
1411 goto destroy_macvlan_port
;
1413 macvlan_set_passthru(port
);
1414 eth_hw_addr_inherit(dev
, lowerdev
);
1417 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1418 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
) {
1420 goto destroy_macvlan_port
;
1422 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1423 err
= macvlan_changelink_sources(vlan
, macmode
, data
);
1425 goto destroy_macvlan_port
;
1428 err
= register_netdevice(dev
);
1430 goto destroy_macvlan_port
;
1432 dev
->priv_flags
|= IFF_MACVLAN
;
1433 err
= netdev_upper_dev_link(lowerdev
, dev
);
1435 goto unregister_netdev
;
1437 list_add_tail_rcu(&vlan
->list
, &port
->vlans
);
1438 netif_stacked_transfer_operstate(lowerdev
, dev
);
1439 linkwatch_fire_event(dev
);
1444 unregister_netdevice(dev
);
1445 destroy_macvlan_port
:
1447 macvlan_port_destroy(port
->dev
);
1450 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
1452 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
1453 struct nlattr
*tb
[], struct nlattr
*data
[],
1454 struct netlink_ext_ack
*extack
)
1456 return macvlan_common_newlink(src_net
, dev
, tb
, data
);
1459 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
1461 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1463 if (vlan
->mode
== MACVLAN_MODE_SOURCE
)
1464 macvlan_flush_sources(vlan
->port
, vlan
);
1465 list_del_rcu(&vlan
->list
);
1466 unregister_netdevice_queue(dev
, head
);
1467 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
1469 EXPORT_SYMBOL_GPL(macvlan_dellink
);
1471 static int macvlan_changelink(struct net_device
*dev
,
1472 struct nlattr
*tb
[], struct nlattr
*data
[],
1473 struct netlink_ext_ack
*extack
)
1475 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1476 enum macvlan_mode mode
;
1477 bool set_mode
= false;
1478 enum macvlan_macaddr_mode macmode
;
1481 /* Validate mode, but don't set yet: setting flags may fail. */
1482 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1484 mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1485 /* Passthrough mode can't be set or cleared dynamically */
1486 if ((mode
== MACVLAN_MODE_PASSTHRU
) !=
1487 (vlan
->mode
== MACVLAN_MODE_PASSTHRU
))
1489 if (vlan
->mode
== MACVLAN_MODE_SOURCE
&&
1491 macvlan_flush_sources(vlan
->port
, vlan
);
1494 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
1495 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1496 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
1497 if (macvlan_passthru(vlan
->port
) && promisc
) {
1500 if (flags
& MACVLAN_FLAG_NOPROMISC
)
1501 err
= dev_set_promiscuity(vlan
->lowerdev
, -1);
1503 err
= dev_set_promiscuity(vlan
->lowerdev
, 1);
1507 vlan
->flags
= flags
;
1511 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1512 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
)
1514 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1515 ret
= macvlan_changelink_sources(vlan
, macmode
, data
);
1522 static size_t macvlan_get_size_mac(const struct macvlan_dev
*vlan
)
1524 if (vlan
->macaddr_count
== 0)
1526 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1527 + vlan
->macaddr_count
* nla_total_size(sizeof(u8
) * ETH_ALEN
);
1530 static size_t macvlan_get_size(const struct net_device
*dev
)
1532 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1535 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1536 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1537 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1538 + macvlan_get_size_mac(vlan
) /* IFLA_MACVLAN_MACADDR */
1542 static int macvlan_fill_info_macaddr(struct sk_buff
*skb
,
1543 const struct macvlan_dev
*vlan
,
1546 struct hlist_head
*h
= &vlan
->port
->vlan_source_hash
[i
];
1547 struct macvlan_source_entry
*entry
;
1549 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
1550 if (entry
->vlan
!= vlan
)
1552 if (nla_put(skb
, IFLA_MACVLAN_MACADDR
, ETH_ALEN
, entry
->addr
))
1558 static int macvlan_fill_info(struct sk_buff
*skb
,
1559 const struct net_device
*dev
)
1561 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1563 struct nlattr
*nest
;
1565 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
1566 goto nla_put_failure
;
1567 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
1568 goto nla_put_failure
;
1569 if (nla_put_u32(skb
, IFLA_MACVLAN_MACADDR_COUNT
, vlan
->macaddr_count
))
1570 goto nla_put_failure
;
1571 if (vlan
->macaddr_count
> 0) {
1572 nest
= nla_nest_start(skb
, IFLA_MACVLAN_MACADDR_DATA
);
1574 goto nla_put_failure
;
1576 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
1577 if (macvlan_fill_info_macaddr(skb
, vlan
, i
))
1578 goto nla_put_failure
;
1580 nla_nest_end(skb
, nest
);
1588 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
1589 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
1590 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
1591 [IFLA_MACVLAN_MACADDR_MODE
] = { .type
= NLA_U32
},
1592 [IFLA_MACVLAN_MACADDR
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1593 [IFLA_MACVLAN_MACADDR_DATA
] = { .type
= NLA_NESTED
},
1594 [IFLA_MACVLAN_MACADDR_COUNT
] = { .type
= NLA_U32
},
1597 int macvlan_link_register(struct rtnl_link_ops
*ops
)
1600 ops
->validate
= macvlan_validate
;
1601 ops
->maxtype
= IFLA_MACVLAN_MAX
;
1602 ops
->policy
= macvlan_policy
;
1603 ops
->changelink
= macvlan_changelink
;
1604 ops
->get_size
= macvlan_get_size
;
1605 ops
->fill_info
= macvlan_fill_info
;
1607 return rtnl_link_register(ops
);
1609 EXPORT_SYMBOL_GPL(macvlan_link_register
);
1611 static struct net
*macvlan_get_link_net(const struct net_device
*dev
)
1613 return dev_net(macvlan_dev_real_dev(dev
));
1616 static struct rtnl_link_ops macvlan_link_ops
= {
1618 .setup
= macvlan_setup
,
1619 .newlink
= macvlan_newlink
,
1620 .dellink
= macvlan_dellink
,
1621 .get_link_net
= macvlan_get_link_net
,
1622 .priv_size
= sizeof(struct macvlan_dev
),
1625 static int macvlan_device_event(struct notifier_block
*unused
,
1626 unsigned long event
, void *ptr
)
1628 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1629 struct macvlan_dev
*vlan
, *next
;
1630 struct macvlan_port
*port
;
1631 LIST_HEAD(list_kill
);
1633 if (!macvlan_port_exists(dev
))
1636 port
= macvlan_port_get_rtnl(dev
);
1641 list_for_each_entry(vlan
, &port
->vlans
, list
)
1642 netif_stacked_transfer_operstate(vlan
->lowerdev
,
1645 case NETDEV_FEAT_CHANGE
:
1646 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1647 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
1648 vlan
->dev
->gso_max_segs
= dev
->gso_max_segs
;
1649 netdev_update_features(vlan
->dev
);
1652 case NETDEV_CHANGEMTU
:
1653 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1654 if (vlan
->dev
->mtu
<= dev
->mtu
)
1656 dev_set_mtu(vlan
->dev
, dev
->mtu
);
1659 case NETDEV_CHANGEADDR
:
1660 if (!macvlan_passthru(port
))
1663 vlan
= list_first_entry_or_null(&port
->vlans
,
1667 if (macvlan_sync_address(vlan
->dev
, dev
->dev_addr
))
1671 case NETDEV_UNREGISTER
:
1672 /* twiddle thumbs on netns device moves */
1673 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
1676 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
1677 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
1678 unregister_netdevice_many(&list_kill
);
1680 case NETDEV_PRE_TYPE_CHANGE
:
1681 /* Forbid underlaying device to change its type. */
1684 case NETDEV_NOTIFY_PEERS
:
1685 case NETDEV_BONDING_FAILOVER
:
1686 case NETDEV_RESEND_IGMP
:
1687 /* Propagate to all vlans */
1688 list_for_each_entry(vlan
, &port
->vlans
, list
)
1689 call_netdevice_notifiers(event
, vlan
->dev
);
1694 static struct notifier_block macvlan_notifier_block __read_mostly
= {
1695 .notifier_call
= macvlan_device_event
,
1698 static int __init
macvlan_init_module(void)
1702 register_netdevice_notifier(&macvlan_notifier_block
);
1704 err
= macvlan_link_register(&macvlan_link_ops
);
1709 unregister_netdevice_notifier(&macvlan_notifier_block
);
1713 static void __exit
macvlan_cleanup_module(void)
1715 rtnl_link_unregister(&macvlan_link_ops
);
1716 unregister_netdevice_notifier(&macvlan_notifier_block
);
1719 module_init(macvlan_init_module
);
1720 module_exit(macvlan_cleanup_module
);
1722 MODULE_LICENSE("GPL");
1723 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1724 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1725 MODULE_ALIAS_RTNL_LINK("macvlan");