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/net_tstamp.h>
28 #include <linux/ethtool.h>
29 #include <linux/if_arp.h>
30 #include <linux/if_vlan.h>
31 #include <linux/if_link.h>
32 #include <linux/if_macvlan.h>
33 #include <linux/hash.h>
34 #include <linux/workqueue.h>
35 #include <net/rtnetlink.h>
37 #include <linux/netpoll.h>
38 #include <linux/phy.h>
40 #define MACVLAN_HASH_BITS 8
41 #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS)
42 #define MACVLAN_BC_QUEUE_LEN 1000
44 #define MACVLAN_F_PASSTHRU 1
45 #define MACVLAN_F_ADDRCHANGE 2
48 struct net_device
*dev
;
49 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
50 struct list_head vlans
;
51 struct sk_buff_head bc_queue
;
52 struct work_struct bc_work
;
55 struct hlist_head vlan_source_hash
[MACVLAN_HASH_SIZE
];
56 DECLARE_BITMAP(mc_filter
, MACVLAN_MC_FILTER_SZ
);
57 unsigned char perm_addr
[ETH_ALEN
];
60 struct macvlan_source_entry
{
61 struct hlist_node hlist
;
62 struct macvlan_dev
*vlan
;
63 unsigned char addr
[6+2] __aligned(sizeof(u16
));
67 struct macvlan_skb_cb
{
68 const struct macvlan_dev
*src
;
71 #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
73 static void macvlan_port_destroy(struct net_device
*dev
);
75 static inline bool macvlan_passthru(const struct macvlan_port
*port
)
77 return port
->flags
& MACVLAN_F_PASSTHRU
;
80 static inline void macvlan_set_passthru(struct macvlan_port
*port
)
82 port
->flags
|= MACVLAN_F_PASSTHRU
;
85 static inline bool macvlan_addr_change(const struct macvlan_port
*port
)
87 return port
->flags
& MACVLAN_F_ADDRCHANGE
;
90 static inline void macvlan_set_addr_change(struct macvlan_port
*port
)
92 port
->flags
|= MACVLAN_F_ADDRCHANGE
;
95 static inline void macvlan_clear_addr_change(struct macvlan_port
*port
)
97 port
->flags
&= ~MACVLAN_F_ADDRCHANGE
;
100 /* Hash Ethernet address */
101 static u32
macvlan_eth_hash(const unsigned char *addr
)
103 u64 value
= get_unaligned((u64
*)addr
);
105 /* only want 6 bytes */
111 return hash_64(value
, MACVLAN_HASH_BITS
);
114 static struct macvlan_port
*macvlan_port_get_rcu(const struct net_device
*dev
)
116 return rcu_dereference(dev
->rx_handler_data
);
119 static struct macvlan_port
*macvlan_port_get_rtnl(const struct net_device
*dev
)
121 return rtnl_dereference(dev
->rx_handler_data
);
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
;
417 if (ether_addr_equal_64bits(eth_hdr(skb
)->h_dest
, dev
->dev_addr
))
418 nskb
->pkt_type
= PACKET_HOST
;
420 ret
= netif_rx(nskb
);
421 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, false);
424 static void macvlan_forward_source(struct sk_buff
*skb
,
425 struct macvlan_port
*port
,
426 const unsigned char *addr
)
428 struct macvlan_source_entry
*entry
;
429 u32 idx
= macvlan_eth_hash(addr
);
430 struct hlist_head
*h
= &port
->vlan_source_hash
[idx
];
432 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
433 if (ether_addr_equal_64bits(entry
->addr
, addr
))
434 macvlan_forward_source_one(skb
, entry
->vlan
);
438 /* called under rcu_read_lock() from netif_receive_skb */
439 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
441 struct macvlan_port
*port
;
442 struct sk_buff
*skb
= *pskb
;
443 const struct ethhdr
*eth
= eth_hdr(skb
);
444 const struct macvlan_dev
*vlan
;
445 const struct macvlan_dev
*src
;
446 struct net_device
*dev
;
447 unsigned int len
= 0;
449 rx_handler_result_t handle_res
;
451 port
= macvlan_port_get_rcu(skb
->dev
);
452 if (is_multicast_ether_addr(eth
->h_dest
)) {
455 skb
= ip_check_defrag(dev_net(skb
->dev
), skb
, IP_DEFRAG_MACVLAN
);
457 return RX_HANDLER_CONSUMED
;
460 macvlan_forward_source(skb
, port
, eth
->h_source
);
461 src
= macvlan_hash_lookup(port
, eth
->h_source
);
462 if (src
&& src
->mode
!= MACVLAN_MODE_VEPA
&&
463 src
->mode
!= MACVLAN_MODE_BRIDGE
) {
464 /* forward to original port. */
466 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0) ?:
468 handle_res
= RX_HANDLER_CONSUMED
;
472 hash
= mc_hash(NULL
, eth
->h_dest
);
473 if (test_bit(hash
, port
->mc_filter
))
474 macvlan_broadcast_enqueue(port
, src
, skb
);
476 return RX_HANDLER_PASS
;
479 macvlan_forward_source(skb
, port
, eth
->h_source
);
480 if (macvlan_passthru(port
))
481 vlan
= list_first_or_null_rcu(&port
->vlans
,
482 struct macvlan_dev
, list
);
484 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
485 if (!vlan
|| vlan
->mode
== MACVLAN_MODE_SOURCE
)
486 return RX_HANDLER_PASS
;
489 if (unlikely(!(dev
->flags
& IFF_UP
))) {
491 return RX_HANDLER_CONSUMED
;
493 len
= skb
->len
+ ETH_HLEN
;
494 skb
= skb_share_check(skb
, GFP_ATOMIC
);
497 handle_res
= RX_HANDLER_CONSUMED
;
503 skb
->pkt_type
= PACKET_HOST
;
505 ret
= NET_RX_SUCCESS
;
506 handle_res
= RX_HANDLER_ANOTHER
;
508 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, false);
512 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
514 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
515 const struct macvlan_port
*port
= vlan
->port
;
516 const struct macvlan_dev
*dest
;
518 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
519 const struct ethhdr
*eth
= (void *)skb
->data
;
521 /* send to other bridge ports directly */
522 if (is_multicast_ether_addr(eth
->h_dest
)) {
523 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
527 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
528 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
529 /* send to lowerdev first for its network taps */
530 dev_forward_skb(vlan
->lowerdev
, skb
);
532 return NET_XMIT_SUCCESS
;
536 skb
->dev
= vlan
->lowerdev
;
537 return dev_queue_xmit_accel(skb
,
538 netdev_get_sb_channel(dev
) ? dev
: NULL
);
541 static inline netdev_tx_t
macvlan_netpoll_send_skb(struct macvlan_dev
*vlan
, struct sk_buff
*skb
)
543 #ifdef CONFIG_NET_POLL_CONTROLLER
545 netpoll_send_skb(vlan
->netpoll
, skb
);
552 static netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
553 struct net_device
*dev
)
555 struct macvlan_dev
*vlan
= netdev_priv(dev
);
556 unsigned int len
= skb
->len
;
559 if (unlikely(netpoll_tx_running(dev
)))
560 return macvlan_netpoll_send_skb(vlan
, skb
);
562 ret
= macvlan_queue_xmit(skb
, dev
);
564 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
565 struct vlan_pcpu_stats
*pcpu_stats
;
567 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
568 u64_stats_update_begin(&pcpu_stats
->syncp
);
569 pcpu_stats
->tx_packets
++;
570 pcpu_stats
->tx_bytes
+= len
;
571 u64_stats_update_end(&pcpu_stats
->syncp
);
573 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
578 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
579 unsigned short type
, const void *daddr
,
580 const void *saddr
, unsigned len
)
582 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
583 struct net_device
*lowerdev
= vlan
->lowerdev
;
585 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
586 saddr
? : dev
->dev_addr
, len
);
589 static const struct header_ops macvlan_hard_header_ops
= {
590 .create
= macvlan_hard_header
,
591 .parse
= eth_header_parse
,
592 .cache
= eth_header_cache
,
593 .cache_update
= eth_header_cache_update
,
596 static int macvlan_open(struct net_device
*dev
)
598 struct macvlan_dev
*vlan
= netdev_priv(dev
);
599 struct net_device
*lowerdev
= vlan
->lowerdev
;
602 if (macvlan_passthru(vlan
->port
)) {
603 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
)) {
604 err
= dev_set_promiscuity(lowerdev
, 1);
612 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
615 /* Attempt to populate accel_priv which is used to offload the L2
616 * forwarding requests for unicast packets.
618 if (lowerdev
->features
& NETIF_F_HW_L2FW_DOFFLOAD
)
620 lowerdev
->netdev_ops
->ndo_dfwd_add_station(lowerdev
, dev
);
622 /* If earlier attempt to offload failed, or accel_priv is not
623 * populated we must add the unicast address to the lower device.
625 if (IS_ERR_OR_NULL(vlan
->accel_priv
)) {
626 vlan
->accel_priv
= NULL
;
627 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
632 if (dev
->flags
& IFF_ALLMULTI
) {
633 err
= dev_set_allmulti(lowerdev
, 1);
638 if (dev
->flags
& IFF_PROMISC
) {
639 err
= dev_set_promiscuity(lowerdev
, 1);
645 macvlan_hash_add(vlan
);
649 if (dev
->flags
& IFF_ALLMULTI
)
650 dev_set_allmulti(lowerdev
, -1);
652 if (vlan
->accel_priv
) {
653 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
655 vlan
->accel_priv
= NULL
;
657 dev_uc_del(lowerdev
, dev
->dev_addr
);
663 static int macvlan_stop(struct net_device
*dev
)
665 struct macvlan_dev
*vlan
= netdev_priv(dev
);
666 struct net_device
*lowerdev
= vlan
->lowerdev
;
668 if (vlan
->accel_priv
) {
669 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
671 vlan
->accel_priv
= NULL
;
674 dev_uc_unsync(lowerdev
, dev
);
675 dev_mc_unsync(lowerdev
, dev
);
677 if (macvlan_passthru(vlan
->port
)) {
678 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
679 dev_set_promiscuity(lowerdev
, -1);
683 if (dev
->flags
& IFF_ALLMULTI
)
684 dev_set_allmulti(lowerdev
, -1);
686 if (dev
->flags
& IFF_PROMISC
)
687 dev_set_promiscuity(lowerdev
, -1);
689 dev_uc_del(lowerdev
, dev
->dev_addr
);
692 macvlan_hash_del(vlan
, !dev
->dismantle
);
696 static int macvlan_sync_address(struct net_device
*dev
, unsigned char *addr
)
698 struct macvlan_dev
*vlan
= netdev_priv(dev
);
699 struct net_device
*lowerdev
= vlan
->lowerdev
;
700 struct macvlan_port
*port
= vlan
->port
;
703 if (!(dev
->flags
& IFF_UP
)) {
704 /* Just copy in the new address */
705 ether_addr_copy(dev
->dev_addr
, addr
);
707 /* Rehash and update the device filters */
708 if (macvlan_addr_busy(vlan
->port
, addr
))
711 if (!macvlan_passthru(port
)) {
712 err
= dev_uc_add(lowerdev
, addr
);
716 dev_uc_del(lowerdev
, dev
->dev_addr
);
719 macvlan_hash_change_addr(vlan
, addr
);
721 if (macvlan_passthru(port
) && !macvlan_addr_change(port
)) {
722 /* Since addr_change isn't set, we are here due to lower
723 * device change. Save the lower-dev address so we can
726 ether_addr_copy(vlan
->port
->perm_addr
,
729 macvlan_clear_addr_change(port
);
733 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
735 struct macvlan_dev
*vlan
= netdev_priv(dev
);
736 struct sockaddr
*addr
= p
;
738 if (!is_valid_ether_addr(addr
->sa_data
))
739 return -EADDRNOTAVAIL
;
741 /* If the addresses are the same, this is a no-op */
742 if (ether_addr_equal(dev
->dev_addr
, addr
->sa_data
))
745 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
746 macvlan_set_addr_change(vlan
->port
);
747 return dev_set_mac_address(vlan
->lowerdev
, addr
, NULL
);
750 if (macvlan_addr_busy(vlan
->port
, addr
->sa_data
))
753 return macvlan_sync_address(dev
, addr
->sa_data
);
756 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
758 struct macvlan_dev
*vlan
= netdev_priv(dev
);
759 struct net_device
*lowerdev
= vlan
->lowerdev
;
761 if (dev
->flags
& IFF_UP
) {
762 if (change
& IFF_ALLMULTI
)
763 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
764 if (change
& IFF_PROMISC
)
765 dev_set_promiscuity(lowerdev
,
766 dev
->flags
& IFF_PROMISC
? 1 : -1);
771 static void macvlan_compute_filter(unsigned long *mc_filter
,
772 struct net_device
*dev
,
773 struct macvlan_dev
*vlan
)
775 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
776 bitmap_fill(mc_filter
, MACVLAN_MC_FILTER_SZ
);
778 struct netdev_hw_addr
*ha
;
779 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
781 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
782 netdev_for_each_mc_addr(ha
, dev
) {
783 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
786 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
788 bitmap_copy(mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
792 static void macvlan_set_mac_lists(struct net_device
*dev
)
794 struct macvlan_dev
*vlan
= netdev_priv(dev
);
796 macvlan_compute_filter(vlan
->mc_filter
, dev
, vlan
);
798 dev_uc_sync(vlan
->lowerdev
, dev
);
799 dev_mc_sync(vlan
->lowerdev
, dev
);
801 /* This is slightly inaccurate as we're including the subscription
802 * list of vlan->lowerdev too.
804 * Bug alert: This only works if everyone has the same broadcast
805 * address as lowerdev. As soon as someone changes theirs this
808 * However, this is already broken as when you change your broadcast
809 * address we don't get called.
811 * The solution is to maintain a list of broadcast addresses like
812 * we do for uc/mc, if you care.
814 macvlan_compute_filter(vlan
->port
->mc_filter
, vlan
->lowerdev
, NULL
);
817 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
819 struct macvlan_dev
*vlan
= netdev_priv(dev
);
821 if (vlan
->lowerdev
->mtu
< new_mtu
)
827 static int macvlan_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
829 struct net_device
*real_dev
= macvlan_dev_real_dev(dev
);
830 const struct net_device_ops
*ops
= real_dev
->netdev_ops
;
832 int err
= -EOPNOTSUPP
;
834 strncpy(ifrr
.ifr_name
, real_dev
->name
, IFNAMSIZ
);
835 ifrr
.ifr_ifru
= ifr
->ifr_ifru
;
839 if (!net_eq(dev_net(dev
), &init_net
))
842 if (netif_device_present(real_dev
) && ops
->ndo_do_ioctl
)
843 err
= ops
->ndo_do_ioctl(real_dev
, &ifrr
, cmd
);
848 ifr
->ifr_ifru
= ifrr
.ifr_ifru
;
854 * macvlan network devices have devices nesting below it and are a special
855 * "super class" of normal network devices; split their locks off into a
856 * separate class since they always nest.
858 static struct lock_class_key macvlan_netdev_addr_lock_key
;
860 #define ALWAYS_ON_OFFLOADS \
861 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \
862 NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL)
864 #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX)
866 #define MACVLAN_FEATURES \
867 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
868 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \
869 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
870 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
872 #define MACVLAN_STATE_MASK \
873 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
875 static int macvlan_get_nest_level(struct net_device
*dev
)
877 return ((struct macvlan_dev
*)netdev_priv(dev
))->nest_level
;
880 static void macvlan_set_lockdep_class(struct net_device
*dev
)
882 netdev_lockdep_set_classes(dev
);
883 lockdep_set_class_and_subclass(&dev
->addr_list_lock
,
884 &macvlan_netdev_addr_lock_key
,
885 macvlan_get_nest_level(dev
));
888 static int macvlan_init(struct net_device
*dev
)
890 struct macvlan_dev
*vlan
= netdev_priv(dev
);
891 const struct net_device
*lowerdev
= vlan
->lowerdev
;
892 struct macvlan_port
*port
= vlan
->port
;
894 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
895 (lowerdev
->state
& MACVLAN_STATE_MASK
);
896 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
897 dev
->features
|= ALWAYS_ON_FEATURES
;
898 dev
->hw_features
|= NETIF_F_LRO
;
899 dev
->vlan_features
= lowerdev
->vlan_features
& MACVLAN_FEATURES
;
900 dev
->vlan_features
|= ALWAYS_ON_OFFLOADS
;
901 dev
->hw_enc_features
|= dev
->features
;
902 dev
->gso_max_size
= lowerdev
->gso_max_size
;
903 dev
->gso_max_segs
= lowerdev
->gso_max_segs
;
904 dev
->hard_header_len
= lowerdev
->hard_header_len
;
906 macvlan_set_lockdep_class(dev
);
908 vlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct vlan_pcpu_stats
);
909 if (!vlan
->pcpu_stats
)
917 static void macvlan_uninit(struct net_device
*dev
)
919 struct macvlan_dev
*vlan
= netdev_priv(dev
);
920 struct macvlan_port
*port
= vlan
->port
;
922 free_percpu(vlan
->pcpu_stats
);
924 macvlan_flush_sources(port
, vlan
);
927 macvlan_port_destroy(port
->dev
);
930 static void macvlan_dev_get_stats64(struct net_device
*dev
,
931 struct rtnl_link_stats64
*stats
)
933 struct macvlan_dev
*vlan
= netdev_priv(dev
);
935 if (vlan
->pcpu_stats
) {
936 struct vlan_pcpu_stats
*p
;
937 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
938 u32 rx_errors
= 0, tx_dropped
= 0;
942 for_each_possible_cpu(i
) {
943 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
945 start
= u64_stats_fetch_begin_irq(&p
->syncp
);
946 rx_packets
= p
->rx_packets
;
947 rx_bytes
= p
->rx_bytes
;
948 rx_multicast
= p
->rx_multicast
;
949 tx_packets
= p
->tx_packets
;
950 tx_bytes
= p
->tx_bytes
;
951 } while (u64_stats_fetch_retry_irq(&p
->syncp
, start
));
953 stats
->rx_packets
+= rx_packets
;
954 stats
->rx_bytes
+= rx_bytes
;
955 stats
->multicast
+= rx_multicast
;
956 stats
->tx_packets
+= tx_packets
;
957 stats
->tx_bytes
+= tx_bytes
;
958 /* rx_errors & tx_dropped are u32, updated
959 * without syncp protection.
961 rx_errors
+= p
->rx_errors
;
962 tx_dropped
+= p
->tx_dropped
;
964 stats
->rx_errors
= rx_errors
;
965 stats
->rx_dropped
= rx_errors
;
966 stats
->tx_dropped
= tx_dropped
;
970 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
971 __be16 proto
, u16 vid
)
973 struct macvlan_dev
*vlan
= netdev_priv(dev
);
974 struct net_device
*lowerdev
= vlan
->lowerdev
;
976 return vlan_vid_add(lowerdev
, proto
, vid
);
979 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
980 __be16 proto
, u16 vid
)
982 struct macvlan_dev
*vlan
= netdev_priv(dev
);
983 struct net_device
*lowerdev
= vlan
->lowerdev
;
985 vlan_vid_del(lowerdev
, proto
, vid
);
989 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
990 struct net_device
*dev
,
991 const unsigned char *addr
, u16 vid
,
993 struct netlink_ext_ack
*extack
)
995 struct macvlan_dev
*vlan
= netdev_priv(dev
);
998 /* Support unicast filter only on passthru devices.
999 * Multicast filter should be allowed on all devices.
1001 if (!macvlan_passthru(vlan
->port
) && is_unicast_ether_addr(addr
))
1004 if (flags
& NLM_F_REPLACE
)
1007 if (is_unicast_ether_addr(addr
))
1008 err
= dev_uc_add_excl(dev
, addr
);
1009 else if (is_multicast_ether_addr(addr
))
1010 err
= dev_mc_add_excl(dev
, addr
);
1015 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
1016 struct net_device
*dev
,
1017 const unsigned char *addr
, u16 vid
)
1019 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1022 /* Support unicast filter only on passthru devices.
1023 * Multicast filter should be allowed on all devices.
1025 if (!macvlan_passthru(vlan
->port
) && is_unicast_ether_addr(addr
))
1028 if (is_unicast_ether_addr(addr
))
1029 err
= dev_uc_del(dev
, addr
);
1030 else if (is_multicast_ether_addr(addr
))
1031 err
= dev_mc_del(dev
, addr
);
1036 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
1037 struct ethtool_drvinfo
*drvinfo
)
1039 strlcpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
1040 strlcpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
1043 static int macvlan_ethtool_get_link_ksettings(struct net_device
*dev
,
1044 struct ethtool_link_ksettings
*cmd
)
1046 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
1048 return __ethtool_get_link_ksettings(vlan
->lowerdev
, cmd
);
1051 static int macvlan_ethtool_get_ts_info(struct net_device
*dev
,
1052 struct ethtool_ts_info
*info
)
1054 struct net_device
*real_dev
= macvlan_dev_real_dev(dev
);
1055 const struct ethtool_ops
*ops
= real_dev
->ethtool_ops
;
1056 struct phy_device
*phydev
= real_dev
->phydev
;
1058 if (phydev
&& phydev
->drv
&& phydev
->drv
->ts_info
) {
1059 return phydev
->drv
->ts_info(phydev
, info
);
1060 } else if (ops
->get_ts_info
) {
1061 return ops
->get_ts_info(real_dev
, info
);
1063 info
->so_timestamping
= SOF_TIMESTAMPING_RX_SOFTWARE
|
1064 SOF_TIMESTAMPING_SOFTWARE
;
1065 info
->phc_index
= -1;
1071 static netdev_features_t
macvlan_fix_features(struct net_device
*dev
,
1072 netdev_features_t features
)
1074 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1075 netdev_features_t lowerdev_features
= vlan
->lowerdev
->features
;
1076 netdev_features_t mask
;
1078 features
|= NETIF_F_ALL_FOR_ALL
;
1079 features
&= (vlan
->set_features
| ~MACVLAN_FEATURES
);
1082 lowerdev_features
&= (features
| ~NETIF_F_LRO
);
1083 features
= netdev_increment_features(lowerdev_features
, features
, mask
);
1084 features
|= ALWAYS_ON_FEATURES
;
1085 features
&= (ALWAYS_ON_FEATURES
| MACVLAN_FEATURES
);
1090 #ifdef CONFIG_NET_POLL_CONTROLLER
1091 static void macvlan_dev_poll_controller(struct net_device
*dev
)
1096 static int macvlan_dev_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*npinfo
)
1098 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1099 struct net_device
*real_dev
= vlan
->lowerdev
;
1100 struct netpoll
*netpoll
;
1103 netpoll
= kzalloc(sizeof(*netpoll
), GFP_KERNEL
);
1108 err
= __netpoll_setup(netpoll
, real_dev
);
1114 vlan
->netpoll
= netpoll
;
1120 static void macvlan_dev_netpoll_cleanup(struct net_device
*dev
)
1122 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1123 struct netpoll
*netpoll
= vlan
->netpoll
;
1128 vlan
->netpoll
= NULL
;
1130 __netpoll_free(netpoll
);
1132 #endif /* CONFIG_NET_POLL_CONTROLLER */
1134 static int macvlan_dev_get_iflink(const struct net_device
*dev
)
1136 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1138 return vlan
->lowerdev
->ifindex
;
1141 static const struct ethtool_ops macvlan_ethtool_ops
= {
1142 .get_link
= ethtool_op_get_link
,
1143 .get_link_ksettings
= macvlan_ethtool_get_link_ksettings
,
1144 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
1145 .get_ts_info
= macvlan_ethtool_get_ts_info
,
1148 static const struct net_device_ops macvlan_netdev_ops
= {
1149 .ndo_init
= macvlan_init
,
1150 .ndo_uninit
= macvlan_uninit
,
1151 .ndo_open
= macvlan_open
,
1152 .ndo_stop
= macvlan_stop
,
1153 .ndo_start_xmit
= macvlan_start_xmit
,
1154 .ndo_change_mtu
= macvlan_change_mtu
,
1155 .ndo_do_ioctl
= macvlan_do_ioctl
,
1156 .ndo_fix_features
= macvlan_fix_features
,
1157 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
1158 .ndo_set_mac_address
= macvlan_set_mac_address
,
1159 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
1160 .ndo_get_stats64
= macvlan_dev_get_stats64
,
1161 .ndo_validate_addr
= eth_validate_addr
,
1162 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
1163 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
1164 .ndo_fdb_add
= macvlan_fdb_add
,
1165 .ndo_fdb_del
= macvlan_fdb_del
,
1166 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
1167 .ndo_get_lock_subclass
= macvlan_get_nest_level
,
1168 #ifdef CONFIG_NET_POLL_CONTROLLER
1169 .ndo_poll_controller
= macvlan_dev_poll_controller
,
1170 .ndo_netpoll_setup
= macvlan_dev_netpoll_setup
,
1171 .ndo_netpoll_cleanup
= macvlan_dev_netpoll_cleanup
,
1173 .ndo_get_iflink
= macvlan_dev_get_iflink
,
1174 .ndo_features_check
= passthru_features_check
,
1175 .ndo_change_proto_down
= dev_change_proto_down_generic
,
1178 void macvlan_common_setup(struct net_device
*dev
)
1183 dev
->max_mtu
= ETH_MAX_MTU
;
1184 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1185 netif_keep_dst(dev
);
1186 dev
->priv_flags
|= IFF_UNICAST_FLT
;
1187 dev
->netdev_ops
= &macvlan_netdev_ops
;
1188 dev
->needs_free_netdev
= true;
1189 dev
->header_ops
= &macvlan_hard_header_ops
;
1190 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
1192 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
1194 static void macvlan_setup(struct net_device
*dev
)
1196 macvlan_common_setup(dev
);
1197 dev
->priv_flags
|= IFF_NO_QUEUE
;
1200 static int macvlan_port_create(struct net_device
*dev
)
1202 struct macvlan_port
*port
;
1206 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
1209 if (netdev_is_rx_handler_busy(dev
))
1212 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
1217 ether_addr_copy(port
->perm_addr
, dev
->dev_addr
);
1218 INIT_LIST_HEAD(&port
->vlans
);
1219 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1220 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
1221 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1222 INIT_HLIST_HEAD(&port
->vlan_source_hash
[i
]);
1224 skb_queue_head_init(&port
->bc_queue
);
1225 INIT_WORK(&port
->bc_work
, macvlan_process_broadcast
);
1227 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
1231 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
1235 static void macvlan_port_destroy(struct net_device
*dev
)
1237 struct macvlan_port
*port
= macvlan_port_get_rtnl(dev
);
1238 struct sk_buff
*skb
;
1240 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
1241 netdev_rx_handler_unregister(dev
);
1243 /* After this point, no packet can schedule bc_work anymore,
1244 * but we need to cancel it and purge left skbs if any.
1246 cancel_work_sync(&port
->bc_work
);
1248 while ((skb
= __skb_dequeue(&port
->bc_queue
))) {
1249 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
1257 /* If the lower device address has been changed by passthru
1258 * macvlan, put it back.
1260 if (macvlan_passthru(port
) &&
1261 !ether_addr_equal(port
->dev
->dev_addr
, port
->perm_addr
)) {
1264 sa
.sa_family
= port
->dev
->type
;
1265 memcpy(&sa
.sa_data
, port
->perm_addr
, port
->dev
->addr_len
);
1266 dev_set_mac_address(port
->dev
, &sa
, NULL
);
1272 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[],
1273 struct netlink_ext_ack
*extack
)
1275 if (tb
[IFLA_ADDRESS
]) {
1276 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
1278 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
1279 return -EADDRNOTAVAIL
;
1285 if (data
[IFLA_MACVLAN_FLAGS
] &&
1286 nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]) & ~MACVLAN_FLAG_NOPROMISC
)
1289 if (data
[IFLA_MACVLAN_MODE
]) {
1290 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
1291 case MACVLAN_MODE_PRIVATE
:
1292 case MACVLAN_MODE_VEPA
:
1293 case MACVLAN_MODE_BRIDGE
:
1294 case MACVLAN_MODE_PASSTHRU
:
1295 case MACVLAN_MODE_SOURCE
:
1302 if (data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1303 switch (nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
])) {
1304 case MACVLAN_MACADDR_ADD
:
1305 case MACVLAN_MACADDR_DEL
:
1306 case MACVLAN_MACADDR_FLUSH
:
1307 case MACVLAN_MACADDR_SET
:
1314 if (data
[IFLA_MACVLAN_MACADDR
]) {
1315 if (nla_len(data
[IFLA_MACVLAN_MACADDR
]) != ETH_ALEN
)
1318 if (!is_valid_ether_addr(nla_data(data
[IFLA_MACVLAN_MACADDR
])))
1319 return -EADDRNOTAVAIL
;
1322 if (data
[IFLA_MACVLAN_MACADDR_COUNT
])
1329 * reconfigure list of remote source mac address
1330 * (only for macvlan devices in source mode)
1331 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1332 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1334 static int macvlan_changelink_sources(struct macvlan_dev
*vlan
, u32 mode
,
1335 struct nlattr
*data
[])
1339 struct nlattr
*nla
, *head
;
1340 struct macvlan_source_entry
*entry
;
1342 if (data
[IFLA_MACVLAN_MACADDR
])
1343 addr
= nla_data(data
[IFLA_MACVLAN_MACADDR
]);
1345 if (mode
== MACVLAN_MACADDR_ADD
) {
1349 return macvlan_hash_add_source(vlan
, addr
);
1351 } else if (mode
== MACVLAN_MACADDR_DEL
) {
1355 entry
= macvlan_hash_lookup_source(vlan
, addr
);
1357 macvlan_hash_del_source(entry
);
1358 vlan
->macaddr_count
--;
1360 } else if (mode
== MACVLAN_MACADDR_FLUSH
) {
1361 macvlan_flush_sources(vlan
->port
, vlan
);
1362 } else if (mode
== MACVLAN_MACADDR_SET
) {
1363 macvlan_flush_sources(vlan
->port
, vlan
);
1366 ret
= macvlan_hash_add_source(vlan
, addr
);
1371 if (!data
|| !data
[IFLA_MACVLAN_MACADDR_DATA
])
1374 head
= nla_data(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1375 len
= nla_len(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1377 nla_for_each_attr(nla
, head
, len
, rem
) {
1378 if (nla_type(nla
) != IFLA_MACVLAN_MACADDR
||
1379 nla_len(nla
) != ETH_ALEN
)
1382 addr
= nla_data(nla
);
1383 ret
= macvlan_hash_add_source(vlan
, addr
);
1394 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
1395 struct nlattr
*tb
[], struct nlattr
*data
[],
1396 struct netlink_ext_ack
*extack
)
1398 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1399 struct macvlan_port
*port
;
1400 struct net_device
*lowerdev
;
1403 bool create
= false;
1408 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
1409 if (lowerdev
== NULL
)
1412 /* When creating macvlans or macvtaps on top of other macvlans - use
1413 * the real device as the lowerdev.
1415 if (netif_is_macvlan(lowerdev
))
1416 lowerdev
= macvlan_dev_real_dev(lowerdev
);
1419 dev
->mtu
= lowerdev
->mtu
;
1420 else if (dev
->mtu
> lowerdev
->mtu
)
1423 /* MTU range: 68 - lowerdev->max_mtu */
1424 dev
->min_mtu
= ETH_MIN_MTU
;
1425 dev
->max_mtu
= lowerdev
->max_mtu
;
1427 if (!tb
[IFLA_ADDRESS
])
1428 eth_hw_addr_random(dev
);
1430 if (!netif_is_macvlan_port(lowerdev
)) {
1431 err
= macvlan_port_create(lowerdev
);
1436 port
= macvlan_port_get_rtnl(lowerdev
);
1438 /* Only 1 macvlan device can be created in passthru mode */
1439 if (macvlan_passthru(port
)) {
1440 /* The macvlan port must be not created this time,
1441 * still goto destroy_macvlan_port for readability.
1444 goto destroy_macvlan_port
;
1447 vlan
->lowerdev
= lowerdev
;
1450 vlan
->set_features
= MACVLAN_FEATURES
;
1451 vlan
->nest_level
= dev_get_nest_level(lowerdev
) + 1;
1453 vlan
->mode
= MACVLAN_MODE_VEPA
;
1454 if (data
&& data
[IFLA_MACVLAN_MODE
])
1455 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1457 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
1458 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1460 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
1463 goto destroy_macvlan_port
;
1465 macvlan_set_passthru(port
);
1466 eth_hw_addr_inherit(dev
, lowerdev
);
1469 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1470 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
) {
1472 goto destroy_macvlan_port
;
1474 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1475 err
= macvlan_changelink_sources(vlan
, macmode
, data
);
1477 goto destroy_macvlan_port
;
1480 err
= register_netdevice(dev
);
1482 goto destroy_macvlan_port
;
1484 dev
->priv_flags
|= IFF_MACVLAN
;
1485 err
= netdev_upper_dev_link(lowerdev
, dev
, extack
);
1487 goto unregister_netdev
;
1489 list_add_tail_rcu(&vlan
->list
, &port
->vlans
);
1490 netif_stacked_transfer_operstate(lowerdev
, dev
);
1491 linkwatch_fire_event(dev
);
1496 /* macvlan_uninit would free the macvlan port */
1497 unregister_netdevice(dev
);
1499 destroy_macvlan_port
:
1500 /* the macvlan port may be freed by macvlan_uninit when fail to register.
1501 * so we destroy the macvlan port only when it's valid.
1503 if (create
&& macvlan_port_get_rtnl(lowerdev
))
1504 macvlan_port_destroy(port
->dev
);
1507 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
1509 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
1510 struct nlattr
*tb
[], struct nlattr
*data
[],
1511 struct netlink_ext_ack
*extack
)
1513 return macvlan_common_newlink(src_net
, dev
, tb
, data
, extack
);
1516 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
1518 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1520 if (vlan
->mode
== MACVLAN_MODE_SOURCE
)
1521 macvlan_flush_sources(vlan
->port
, vlan
);
1522 list_del_rcu(&vlan
->list
);
1523 unregister_netdevice_queue(dev
, head
);
1524 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
1526 EXPORT_SYMBOL_GPL(macvlan_dellink
);
1528 static int macvlan_changelink(struct net_device
*dev
,
1529 struct nlattr
*tb
[], struct nlattr
*data
[],
1530 struct netlink_ext_ack
*extack
)
1532 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1533 enum macvlan_mode mode
;
1534 bool set_mode
= false;
1535 enum macvlan_macaddr_mode macmode
;
1538 /* Validate mode, but don't set yet: setting flags may fail. */
1539 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1541 mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1542 /* Passthrough mode can't be set or cleared dynamically */
1543 if ((mode
== MACVLAN_MODE_PASSTHRU
) !=
1544 (vlan
->mode
== MACVLAN_MODE_PASSTHRU
))
1546 if (vlan
->mode
== MACVLAN_MODE_SOURCE
&&
1548 macvlan_flush_sources(vlan
->port
, vlan
);
1551 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
1552 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1553 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
1554 if (macvlan_passthru(vlan
->port
) && promisc
) {
1557 if (flags
& MACVLAN_FLAG_NOPROMISC
)
1558 err
= dev_set_promiscuity(vlan
->lowerdev
, -1);
1560 err
= dev_set_promiscuity(vlan
->lowerdev
, 1);
1564 vlan
->flags
= flags
;
1568 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1569 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
)
1571 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1572 ret
= macvlan_changelink_sources(vlan
, macmode
, data
);
1579 static size_t macvlan_get_size_mac(const struct macvlan_dev
*vlan
)
1581 if (vlan
->macaddr_count
== 0)
1583 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1584 + vlan
->macaddr_count
* nla_total_size(sizeof(u8
) * ETH_ALEN
);
1587 static size_t macvlan_get_size(const struct net_device
*dev
)
1589 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1592 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1593 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1594 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1595 + macvlan_get_size_mac(vlan
) /* IFLA_MACVLAN_MACADDR */
1599 static int macvlan_fill_info_macaddr(struct sk_buff
*skb
,
1600 const struct macvlan_dev
*vlan
,
1603 struct hlist_head
*h
= &vlan
->port
->vlan_source_hash
[i
];
1604 struct macvlan_source_entry
*entry
;
1606 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
1607 if (entry
->vlan
!= vlan
)
1609 if (nla_put(skb
, IFLA_MACVLAN_MACADDR
, ETH_ALEN
, entry
->addr
))
1615 static int macvlan_fill_info(struct sk_buff
*skb
,
1616 const struct net_device
*dev
)
1618 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1620 struct nlattr
*nest
;
1622 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
1623 goto nla_put_failure
;
1624 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
1625 goto nla_put_failure
;
1626 if (nla_put_u32(skb
, IFLA_MACVLAN_MACADDR_COUNT
, vlan
->macaddr_count
))
1627 goto nla_put_failure
;
1628 if (vlan
->macaddr_count
> 0) {
1629 nest
= nla_nest_start_noflag(skb
, IFLA_MACVLAN_MACADDR_DATA
);
1631 goto nla_put_failure
;
1633 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
1634 if (macvlan_fill_info_macaddr(skb
, vlan
, i
))
1635 goto nla_put_failure
;
1637 nla_nest_end(skb
, nest
);
1645 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
1646 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
1647 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
1648 [IFLA_MACVLAN_MACADDR_MODE
] = { .type
= NLA_U32
},
1649 [IFLA_MACVLAN_MACADDR
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1650 [IFLA_MACVLAN_MACADDR_DATA
] = { .type
= NLA_NESTED
},
1651 [IFLA_MACVLAN_MACADDR_COUNT
] = { .type
= NLA_U32
},
1654 int macvlan_link_register(struct rtnl_link_ops
*ops
)
1657 ops
->validate
= macvlan_validate
;
1658 ops
->maxtype
= IFLA_MACVLAN_MAX
;
1659 ops
->policy
= macvlan_policy
;
1660 ops
->changelink
= macvlan_changelink
;
1661 ops
->get_size
= macvlan_get_size
;
1662 ops
->fill_info
= macvlan_fill_info
;
1664 return rtnl_link_register(ops
);
1666 EXPORT_SYMBOL_GPL(macvlan_link_register
);
1668 static struct net
*macvlan_get_link_net(const struct net_device
*dev
)
1670 return dev_net(macvlan_dev_real_dev(dev
));
1673 static struct rtnl_link_ops macvlan_link_ops
= {
1675 .setup
= macvlan_setup
,
1676 .newlink
= macvlan_newlink
,
1677 .dellink
= macvlan_dellink
,
1678 .get_link_net
= macvlan_get_link_net
,
1679 .priv_size
= sizeof(struct macvlan_dev
),
1682 static int macvlan_device_event(struct notifier_block
*unused
,
1683 unsigned long event
, void *ptr
)
1685 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1686 struct macvlan_dev
*vlan
, *next
;
1687 struct macvlan_port
*port
;
1688 LIST_HEAD(list_kill
);
1690 if (!netif_is_macvlan_port(dev
))
1693 port
= macvlan_port_get_rtnl(dev
);
1699 list_for_each_entry(vlan
, &port
->vlans
, list
)
1700 netif_stacked_transfer_operstate(vlan
->lowerdev
,
1703 case NETDEV_FEAT_CHANGE
:
1704 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1705 vlan
->dev
->gso_max_size
= dev
->gso_max_size
;
1706 vlan
->dev
->gso_max_segs
= dev
->gso_max_segs
;
1707 netdev_update_features(vlan
->dev
);
1710 case NETDEV_CHANGEMTU
:
1711 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1712 if (vlan
->dev
->mtu
<= dev
->mtu
)
1714 dev_set_mtu(vlan
->dev
, dev
->mtu
);
1717 case NETDEV_CHANGEADDR
:
1718 if (!macvlan_passthru(port
))
1721 vlan
= list_first_entry_or_null(&port
->vlans
,
1725 if (macvlan_sync_address(vlan
->dev
, dev
->dev_addr
))
1729 case NETDEV_UNREGISTER
:
1730 /* twiddle thumbs on netns device moves */
1731 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
1734 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
1735 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
1736 unregister_netdevice_many(&list_kill
);
1738 case NETDEV_PRE_TYPE_CHANGE
:
1739 /* Forbid underlaying device to change its type. */
1742 case NETDEV_NOTIFY_PEERS
:
1743 case NETDEV_BONDING_FAILOVER
:
1744 case NETDEV_RESEND_IGMP
:
1745 /* Propagate to all vlans */
1746 list_for_each_entry(vlan
, &port
->vlans
, list
)
1747 call_netdevice_notifiers(event
, vlan
->dev
);
1752 static struct notifier_block macvlan_notifier_block __read_mostly
= {
1753 .notifier_call
= macvlan_device_event
,
1756 static int __init
macvlan_init_module(void)
1760 register_netdevice_notifier(&macvlan_notifier_block
);
1762 err
= macvlan_link_register(&macvlan_link_ops
);
1767 unregister_netdevice_notifier(&macvlan_notifier_block
);
1771 static void __exit
macvlan_cleanup_module(void)
1773 rtnl_link_unregister(&macvlan_link_ops
);
1774 unregister_netdevice_notifier(&macvlan_notifier_block
);
1777 module_init(macvlan_init_module
);
1778 module_exit(macvlan_cleanup_module
);
1780 MODULE_LICENSE("GPL");
1781 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1782 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1783 MODULE_ALIAS_RTNL_LINK("macvlan");