1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
5 * The code this is based on carried the following copyright notice:
7 * (C) Copyright 2001-2006
8 * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com
9 * Re-worked by Ben Greear <greearb@candelatech.com>
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/errno.h>
17 #include <linux/slab.h>
18 #include <linux/string.h>
19 #include <linux/rculist.h>
20 #include <linux/notifier.h>
21 #include <linux/netdevice.h>
22 #include <linux/etherdevice.h>
23 #include <linux/net_tstamp.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_arp.h>
26 #include <linux/if_vlan.h>
27 #include <linux/if_link.h>
28 #include <linux/if_macvlan.h>
29 #include <linux/hash.h>
30 #include <linux/workqueue.h>
31 #include <net/rtnetlink.h>
33 #include <linux/netpoll.h>
34 #include <linux/phy.h>
36 #define MACVLAN_HASH_BITS 8
37 #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS)
38 #define MACVLAN_DEFAULT_BC_QUEUE_LEN 1000
40 #define MACVLAN_F_PASSTHRU 1
41 #define MACVLAN_F_ADDRCHANGE 2
44 struct net_device
*dev
;
45 struct hlist_head vlan_hash
[MACVLAN_HASH_SIZE
];
46 struct list_head vlans
;
47 struct sk_buff_head bc_queue
;
48 struct work_struct bc_work
;
49 u32 bc_queue_len_used
;
53 struct hlist_head vlan_source_hash
[MACVLAN_HASH_SIZE
];
54 DECLARE_BITMAP(bc_filter
, MACVLAN_MC_FILTER_SZ
);
55 DECLARE_BITMAP(mc_filter
, MACVLAN_MC_FILTER_SZ
);
56 unsigned char perm_addr
[ETH_ALEN
];
59 struct macvlan_source_entry
{
60 struct hlist_node hlist
;
61 struct macvlan_dev
*vlan
;
62 unsigned char addr
[6+2] __aligned(sizeof(u16
));
66 struct macvlan_skb_cb
{
67 const struct macvlan_dev
*src
;
70 #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
72 static void macvlan_port_destroy(struct net_device
*dev
);
73 static void update_port_bc_queue_len(struct macvlan_port
*port
);
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 lockdep_rtnl_is_held()) {
132 if (ether_addr_equal_64bits(vlan
->dev
->dev_addr
, addr
))
138 static struct macvlan_source_entry
*macvlan_hash_lookup_source(
139 const struct macvlan_dev
*vlan
,
140 const unsigned char *addr
)
142 struct macvlan_source_entry
*entry
;
143 u32 idx
= macvlan_eth_hash(addr
);
144 struct hlist_head
*h
= &vlan
->port
->vlan_source_hash
[idx
];
146 hlist_for_each_entry_rcu(entry
, h
, hlist
, lockdep_rtnl_is_held()) {
147 if (ether_addr_equal_64bits(entry
->addr
, addr
) &&
154 static int macvlan_hash_add_source(struct macvlan_dev
*vlan
,
155 const unsigned char *addr
)
157 struct macvlan_port
*port
= vlan
->port
;
158 struct macvlan_source_entry
*entry
;
159 struct hlist_head
*h
;
161 entry
= macvlan_hash_lookup_source(vlan
, addr
);
165 entry
= kmalloc(sizeof(*entry
), GFP_KERNEL
);
169 ether_addr_copy(entry
->addr
, addr
);
171 h
= &port
->vlan_source_hash
[macvlan_eth_hash(addr
)];
172 hlist_add_head_rcu(&entry
->hlist
, h
);
173 vlan
->macaddr_count
++;
178 static void macvlan_hash_add(struct macvlan_dev
*vlan
)
180 struct macvlan_port
*port
= vlan
->port
;
181 const unsigned char *addr
= vlan
->dev
->dev_addr
;
182 u32 idx
= macvlan_eth_hash(addr
);
184 hlist_add_head_rcu(&vlan
->hlist
, &port
->vlan_hash
[idx
]);
187 static void macvlan_hash_del_source(struct macvlan_source_entry
*entry
)
189 hlist_del_rcu(&entry
->hlist
);
190 kfree_rcu(entry
, rcu
);
193 static void macvlan_hash_del(struct macvlan_dev
*vlan
, bool sync
)
195 hlist_del_rcu(&vlan
->hlist
);
200 static void macvlan_hash_change_addr(struct macvlan_dev
*vlan
,
201 const unsigned char *addr
)
203 macvlan_hash_del(vlan
, true);
204 /* Now that we are unhashed it is safe to change the device
205 * address without confusing packet delivery.
207 eth_hw_addr_set(vlan
->dev
, addr
);
208 macvlan_hash_add(vlan
);
211 static bool macvlan_addr_busy(const struct macvlan_port
*port
,
212 const unsigned char *addr
)
214 /* Test to see if the specified address is
215 * currently in use by the underlying device or
218 if (!macvlan_passthru(port
) && !macvlan_addr_change(port
) &&
219 ether_addr_equal_64bits(port
->dev
->dev_addr
, addr
))
222 if (macvlan_hash_lookup(port
, addr
))
229 static int macvlan_broadcast_one(struct sk_buff
*skb
,
230 const struct macvlan_dev
*vlan
,
231 const struct ethhdr
*eth
, bool local
)
233 struct net_device
*dev
= vlan
->dev
;
236 return __dev_forward_skb(dev
, skb
);
239 if (ether_addr_equal_64bits(eth
->h_dest
, dev
->broadcast
))
240 skb
->pkt_type
= PACKET_BROADCAST
;
242 skb
->pkt_type
= PACKET_MULTICAST
;
247 static u32
macvlan_hash_mix(const struct macvlan_dev
*vlan
)
249 return (u32
)(((unsigned long)vlan
) >> L1_CACHE_SHIFT
);
253 static unsigned int mc_hash(const struct macvlan_dev
*vlan
,
254 const unsigned char *addr
)
256 u32 val
= __get_unaligned_cpu32(addr
+ 2);
258 val
^= macvlan_hash_mix(vlan
);
259 return hash_32(val
, MACVLAN_MC_FILTER_BITS
);
262 static void macvlan_broadcast(struct sk_buff
*skb
,
263 const struct macvlan_port
*port
,
264 struct net_device
*src
,
265 enum macvlan_mode mode
)
267 const struct ethhdr
*eth
= eth_hdr(skb
);
268 const struct macvlan_dev
*vlan
;
269 struct sk_buff
*nskb
;
274 if (skb
->protocol
== htons(ETH_P_PAUSE
))
277 hash_for_each_rcu(port
->vlan_hash
, i
, vlan
, 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(nskb
, vlan
, eth
,
289 mode
== MACVLAN_MODE_BRIDGE
) ?:
291 macvlan_count_rx(vlan
, skb
->len
+ ETH_HLEN
,
292 err
== NET_RX_SUCCESS
, true);
296 static void macvlan_multicast_rx(const struct macvlan_port
*port
,
297 const struct macvlan_dev
*src
,
301 /* frame comes from an external address */
302 macvlan_broadcast(skb
, port
, NULL
,
303 MACVLAN_MODE_PRIVATE
|
305 MACVLAN_MODE_PASSTHRU
|
306 MACVLAN_MODE_BRIDGE
);
307 else if (src
->mode
== MACVLAN_MODE_VEPA
)
308 /* flood to everyone except source */
309 macvlan_broadcast(skb
, port
, src
->dev
,
311 MACVLAN_MODE_BRIDGE
);
314 * flood only to VEPA ports, bridge ports
315 * already saw the frame on the way out.
317 macvlan_broadcast(skb
, port
, src
->dev
,
321 static void macvlan_process_broadcast(struct work_struct
*w
)
323 struct macvlan_port
*port
= container_of(w
, struct macvlan_port
,
326 struct sk_buff_head list
;
328 __skb_queue_head_init(&list
);
330 spin_lock_bh(&port
->bc_queue
.lock
);
331 skb_queue_splice_tail_init(&port
->bc_queue
, &list
);
332 spin_unlock_bh(&port
->bc_queue
.lock
);
334 while ((skb
= __skb_dequeue(&list
))) {
335 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
338 macvlan_multicast_rx(port
, src
, skb
);
349 static void macvlan_broadcast_enqueue(struct macvlan_port
*port
,
350 const struct macvlan_dev
*src
,
353 struct sk_buff
*nskb
;
356 nskb
= skb_clone(skb
, GFP_ATOMIC
);
360 MACVLAN_SKB_CB(nskb
)->src
= src
;
362 spin_lock(&port
->bc_queue
.lock
);
363 if (skb_queue_len(&port
->bc_queue
) < port
->bc_queue_len_used
) {
366 __skb_queue_tail(&port
->bc_queue
, nskb
);
369 spin_unlock(&port
->bc_queue
.lock
);
371 queue_work(system_unbound_wq
, &port
->bc_work
);
381 dev_core_stats_rx_dropped_inc(skb
->dev
);
384 static void macvlan_flush_sources(struct macvlan_port
*port
,
385 struct macvlan_dev
*vlan
)
387 struct macvlan_source_entry
*entry
;
388 struct hlist_node
*next
;
391 hash_for_each_safe(port
->vlan_source_hash
, i
, next
, entry
, hlist
)
392 if (entry
->vlan
== vlan
)
393 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 bool 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
];
431 bool consume
= false;
433 hlist_for_each_entry_rcu(entry
, h
, hlist
) {
434 if (ether_addr_equal_64bits(entry
->addr
, addr
)) {
435 if (entry
->vlan
->flags
& MACVLAN_FLAG_NODST
)
437 macvlan_forward_source_one(skb
, entry
->vlan
);
444 /* called under rcu_read_lock() from netif_receive_skb */
445 static rx_handler_result_t
macvlan_handle_frame(struct sk_buff
**pskb
)
447 struct macvlan_port
*port
;
448 struct sk_buff
*skb
= *pskb
;
449 const struct ethhdr
*eth
= eth_hdr(skb
);
450 const struct macvlan_dev
*vlan
;
451 const struct macvlan_dev
*src
;
452 struct net_device
*dev
;
453 unsigned int len
= 0;
455 rx_handler_result_t handle_res
;
457 /* Packets from dev_loopback_xmit() do not have L2 header, bail out */
458 if (unlikely(skb
->pkt_type
== PACKET_LOOPBACK
))
459 return RX_HANDLER_PASS
;
461 port
= macvlan_port_get_rcu(skb
->dev
);
462 if (is_multicast_ether_addr(eth
->h_dest
)) {
465 skb
= ip_check_defrag(dev_net(skb
->dev
), skb
, IP_DEFRAG_MACVLAN
);
467 return RX_HANDLER_CONSUMED
;
470 if (macvlan_forward_source(skb
, port
, eth
->h_source
)) {
472 return RX_HANDLER_CONSUMED
;
474 src
= macvlan_hash_lookup(port
, eth
->h_source
);
475 if (src
&& src
->mode
!= MACVLAN_MODE_VEPA
&&
476 src
->mode
!= MACVLAN_MODE_BRIDGE
) {
477 /* forward to original port. */
479 ret
= macvlan_broadcast_one(skb
, vlan
, eth
, 0) ?:
481 handle_res
= RX_HANDLER_CONSUMED
;
485 hash
= mc_hash(NULL
, eth
->h_dest
);
486 if (test_bit(hash
, port
->bc_filter
))
487 macvlan_broadcast_enqueue(port
, src
, skb
);
488 else if (test_bit(hash
, port
->mc_filter
))
489 macvlan_multicast_rx(port
, src
, skb
);
491 return RX_HANDLER_PASS
;
494 if (macvlan_forward_source(skb
, port
, eth
->h_source
)) {
496 return RX_HANDLER_CONSUMED
;
498 if (macvlan_passthru(port
))
499 vlan
= list_first_or_null_rcu(&port
->vlans
,
500 struct macvlan_dev
, list
);
502 vlan
= macvlan_hash_lookup(port
, eth
->h_dest
);
503 if (!vlan
|| vlan
->mode
== MACVLAN_MODE_SOURCE
)
504 return RX_HANDLER_PASS
;
507 if (unlikely(!(dev
->flags
& IFF_UP
))) {
509 return RX_HANDLER_CONSUMED
;
511 len
= skb
->len
+ ETH_HLEN
;
512 skb
= skb_share_check(skb
, GFP_ATOMIC
);
515 handle_res
= RX_HANDLER_CONSUMED
;
521 skb
->pkt_type
= PACKET_HOST
;
523 ret
= NET_RX_SUCCESS
;
524 handle_res
= RX_HANDLER_ANOTHER
;
526 macvlan_count_rx(vlan
, len
, ret
== NET_RX_SUCCESS
, false);
530 static int macvlan_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
532 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
533 const struct macvlan_port
*port
= vlan
->port
;
534 const struct macvlan_dev
*dest
;
536 if (vlan
->mode
== MACVLAN_MODE_BRIDGE
) {
537 const struct ethhdr
*eth
= skb_eth_hdr(skb
);
539 /* send to other bridge ports directly */
540 if (is_multicast_ether_addr(eth
->h_dest
)) {
541 skb_reset_mac_header(skb
);
542 macvlan_broadcast(skb
, port
, dev
, MACVLAN_MODE_BRIDGE
);
546 dest
= macvlan_hash_lookup(port
, eth
->h_dest
);
547 if (dest
&& dest
->mode
== MACVLAN_MODE_BRIDGE
) {
548 /* send to lowerdev first for its network taps */
549 dev_forward_skb(vlan
->lowerdev
, skb
);
551 return NET_XMIT_SUCCESS
;
555 skb
->dev
= vlan
->lowerdev
;
556 return dev_queue_xmit_accel(skb
,
557 netdev_get_sb_channel(dev
) ? dev
: NULL
);
560 static inline netdev_tx_t
macvlan_netpoll_send_skb(struct macvlan_dev
*vlan
, struct sk_buff
*skb
)
562 #ifdef CONFIG_NET_POLL_CONTROLLER
563 return netpoll_send_skb(vlan
->netpoll
, skb
);
570 static netdev_tx_t
macvlan_start_xmit(struct sk_buff
*skb
,
571 struct net_device
*dev
)
573 struct macvlan_dev
*vlan
= netdev_priv(dev
);
574 unsigned int len
= skb
->len
;
577 if (unlikely(netpoll_tx_running(dev
)))
578 return macvlan_netpoll_send_skb(vlan
, skb
);
580 ret
= macvlan_queue_xmit(skb
, dev
);
582 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
583 struct vlan_pcpu_stats
*pcpu_stats
;
585 pcpu_stats
= this_cpu_ptr(vlan
->pcpu_stats
);
586 u64_stats_update_begin(&pcpu_stats
->syncp
);
587 u64_stats_inc(&pcpu_stats
->tx_packets
);
588 u64_stats_add(&pcpu_stats
->tx_bytes
, len
);
589 u64_stats_update_end(&pcpu_stats
->syncp
);
591 this_cpu_inc(vlan
->pcpu_stats
->tx_dropped
);
596 static int macvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
597 unsigned short type
, const void *daddr
,
598 const void *saddr
, unsigned len
)
600 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
601 struct net_device
*lowerdev
= vlan
->lowerdev
;
603 return dev_hard_header(skb
, lowerdev
, type
, daddr
,
604 saddr
? : dev
->dev_addr
, len
);
607 static const struct header_ops macvlan_hard_header_ops
= {
608 .create
= macvlan_hard_header
,
609 .parse
= eth_header_parse
,
610 .cache
= eth_header_cache
,
611 .cache_update
= eth_header_cache_update
,
614 static int macvlan_open(struct net_device
*dev
)
616 struct macvlan_dev
*vlan
= netdev_priv(dev
);
617 struct net_device
*lowerdev
= vlan
->lowerdev
;
620 if (macvlan_passthru(vlan
->port
)) {
621 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
)) {
622 err
= dev_set_promiscuity(lowerdev
, 1);
630 if (macvlan_addr_busy(vlan
->port
, dev
->dev_addr
))
633 /* Attempt to populate accel_priv which is used to offload the L2
634 * forwarding requests for unicast packets.
636 if (lowerdev
->features
& NETIF_F_HW_L2FW_DOFFLOAD
)
638 lowerdev
->netdev_ops
->ndo_dfwd_add_station(lowerdev
, dev
);
640 /* If earlier attempt to offload failed, or accel_priv is not
641 * populated we must add the unicast address to the lower device.
643 if (IS_ERR_OR_NULL(vlan
->accel_priv
)) {
644 vlan
->accel_priv
= NULL
;
645 err
= dev_uc_add(lowerdev
, dev
->dev_addr
);
650 if (dev
->flags
& IFF_ALLMULTI
) {
651 err
= dev_set_allmulti(lowerdev
, 1);
656 if (dev
->flags
& IFF_PROMISC
) {
657 err
= dev_set_promiscuity(lowerdev
, 1);
663 macvlan_hash_add(vlan
);
667 if (dev
->flags
& IFF_ALLMULTI
)
668 dev_set_allmulti(lowerdev
, -1);
670 if (vlan
->accel_priv
) {
671 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
673 vlan
->accel_priv
= NULL
;
675 dev_uc_del(lowerdev
, dev
->dev_addr
);
681 static int macvlan_stop(struct net_device
*dev
)
683 struct macvlan_dev
*vlan
= netdev_priv(dev
);
684 struct net_device
*lowerdev
= vlan
->lowerdev
;
686 if (vlan
->accel_priv
) {
687 lowerdev
->netdev_ops
->ndo_dfwd_del_station(lowerdev
,
689 vlan
->accel_priv
= NULL
;
692 dev_uc_unsync(lowerdev
, dev
);
693 dev_mc_unsync(lowerdev
, dev
);
695 if (macvlan_passthru(vlan
->port
)) {
696 if (!(vlan
->flags
& MACVLAN_FLAG_NOPROMISC
))
697 dev_set_promiscuity(lowerdev
, -1);
701 if (dev
->flags
& IFF_ALLMULTI
)
702 dev_set_allmulti(lowerdev
, -1);
704 if (dev
->flags
& IFF_PROMISC
)
705 dev_set_promiscuity(lowerdev
, -1);
707 dev_uc_del(lowerdev
, dev
->dev_addr
);
710 macvlan_hash_del(vlan
, !dev
->dismantle
);
714 static int macvlan_sync_address(struct net_device
*dev
,
715 const unsigned char *addr
)
717 struct macvlan_dev
*vlan
= netdev_priv(dev
);
718 struct net_device
*lowerdev
= vlan
->lowerdev
;
719 struct macvlan_port
*port
= vlan
->port
;
722 if (!(dev
->flags
& IFF_UP
)) {
723 /* Just copy in the new address */
724 eth_hw_addr_set(dev
, addr
);
726 /* Rehash and update the device filters */
727 if (macvlan_addr_busy(vlan
->port
, addr
))
730 if (!macvlan_passthru(port
)) {
731 err
= dev_uc_add(lowerdev
, addr
);
735 dev_uc_del(lowerdev
, dev
->dev_addr
);
738 macvlan_hash_change_addr(vlan
, addr
);
740 if (macvlan_passthru(port
) && !macvlan_addr_change(port
)) {
741 /* Since addr_change isn't set, we are here due to lower
742 * device change. Save the lower-dev address so we can
745 ether_addr_copy(vlan
->port
->perm_addr
,
748 macvlan_clear_addr_change(port
);
752 static int macvlan_set_mac_address(struct net_device
*dev
, void *p
)
754 struct macvlan_dev
*vlan
= netdev_priv(dev
);
755 struct sockaddr
*addr
= p
;
757 if (!is_valid_ether_addr(addr
->sa_data
))
758 return -EADDRNOTAVAIL
;
760 /* If the addresses are the same, this is a no-op */
761 if (ether_addr_equal(dev
->dev_addr
, addr
->sa_data
))
764 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
765 macvlan_set_addr_change(vlan
->port
);
766 return dev_set_mac_address(vlan
->lowerdev
, addr
, NULL
);
769 if (macvlan_addr_busy(vlan
->port
, addr
->sa_data
))
772 return macvlan_sync_address(dev
, addr
->sa_data
);
775 static void macvlan_change_rx_flags(struct net_device
*dev
, int change
)
777 struct macvlan_dev
*vlan
= netdev_priv(dev
);
778 struct net_device
*lowerdev
= vlan
->lowerdev
;
780 if (dev
->flags
& IFF_UP
) {
781 if (change
& IFF_ALLMULTI
)
782 dev_set_allmulti(lowerdev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
783 if (!macvlan_passthru(vlan
->port
) && change
& IFF_PROMISC
)
784 dev_set_promiscuity(lowerdev
,
785 dev
->flags
& IFF_PROMISC
? 1 : -1);
790 static void macvlan_compute_filter(unsigned long *mc_filter
,
791 struct net_device
*dev
,
792 struct macvlan_dev
*vlan
, int cutoff
)
794 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
795 bitmap_fill(mc_filter
, MACVLAN_MC_FILTER_SZ
);
797 DECLARE_BITMAP(filter
, MACVLAN_MC_FILTER_SZ
);
798 struct netdev_hw_addr
*ha
;
800 bitmap_zero(filter
, MACVLAN_MC_FILTER_SZ
);
801 netdev_for_each_mc_addr(ha
, dev
) {
802 if (!vlan
&& ha
->synced
<= cutoff
)
805 __set_bit(mc_hash(vlan
, ha
->addr
), filter
);
808 __set_bit(mc_hash(vlan
, dev
->broadcast
), filter
);
810 bitmap_copy(mc_filter
, filter
, MACVLAN_MC_FILTER_SZ
);
814 static void macvlan_recompute_bc_filter(struct macvlan_dev
*vlan
)
816 if (vlan
->port
->bc_cutoff
< 0) {
817 bitmap_zero(vlan
->port
->bc_filter
, MACVLAN_MC_FILTER_SZ
);
821 macvlan_compute_filter(vlan
->port
->bc_filter
, vlan
->lowerdev
, NULL
,
822 vlan
->port
->bc_cutoff
);
825 static void macvlan_set_mac_lists(struct net_device
*dev
)
827 struct macvlan_dev
*vlan
= netdev_priv(dev
);
829 macvlan_compute_filter(vlan
->mc_filter
, dev
, vlan
, 0);
831 dev_uc_sync(vlan
->lowerdev
, dev
);
832 dev_mc_sync(vlan
->lowerdev
, dev
);
834 /* This is slightly inaccurate as we're including the subscription
835 * list of vlan->lowerdev too.
837 * Bug alert: This only works if everyone has the same broadcast
838 * address as lowerdev. As soon as someone changes theirs this
841 * However, this is already broken as when you change your broadcast
842 * address we don't get called.
844 * The solution is to maintain a list of broadcast addresses like
845 * we do for uc/mc, if you care.
847 macvlan_compute_filter(vlan
->port
->mc_filter
, vlan
->lowerdev
, NULL
,
849 macvlan_recompute_bc_filter(vlan
);
852 static void update_port_bc_cutoff(struct macvlan_dev
*vlan
, int cutoff
)
854 if (vlan
->port
->bc_cutoff
== cutoff
)
857 vlan
->port
->bc_cutoff
= cutoff
;
858 macvlan_recompute_bc_filter(vlan
);
861 static int macvlan_change_mtu(struct net_device
*dev
, int new_mtu
)
863 struct macvlan_dev
*vlan
= netdev_priv(dev
);
865 if (vlan
->lowerdev
->mtu
< new_mtu
)
871 static int macvlan_hwtstamp_get(struct net_device
*dev
,
872 struct kernel_hwtstamp_config
*cfg
)
874 struct net_device
*real_dev
= macvlan_dev_real_dev(dev
);
876 return generic_hwtstamp_get_lower(real_dev
, cfg
);
879 static int macvlan_hwtstamp_set(struct net_device
*dev
,
880 struct kernel_hwtstamp_config
*cfg
,
881 struct netlink_ext_ack
*extack
)
883 struct net_device
*real_dev
= macvlan_dev_real_dev(dev
);
885 if (!net_eq(dev_net(dev
), &init_net
))
888 return generic_hwtstamp_set_lower(real_dev
, cfg
, extack
);
892 * macvlan network devices have devices nesting below it and are a special
893 * "super class" of normal network devices; split their locks off into a
894 * separate class since they always nest.
896 static struct lock_class_key macvlan_netdev_addr_lock_key
;
898 #define ALWAYS_ON_OFFLOADS \
899 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \
900 NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL)
902 #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX)
904 #define MACVLAN_FEATURES \
905 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
906 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \
907 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
908 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
910 #define MACVLAN_STATE_MASK \
911 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
913 static void macvlan_set_lockdep_class(struct net_device
*dev
)
915 netdev_lockdep_set_classes(dev
);
916 lockdep_set_class(&dev
->addr_list_lock
,
917 &macvlan_netdev_addr_lock_key
);
920 static int macvlan_init(struct net_device
*dev
)
922 struct macvlan_dev
*vlan
= netdev_priv(dev
);
923 struct net_device
*lowerdev
= vlan
->lowerdev
;
924 struct macvlan_port
*port
= vlan
->port
;
926 dev
->state
= (dev
->state
& ~MACVLAN_STATE_MASK
) |
927 (lowerdev
->state
& MACVLAN_STATE_MASK
);
928 dev
->features
= lowerdev
->features
& MACVLAN_FEATURES
;
929 dev
->features
|= ALWAYS_ON_FEATURES
;
930 dev
->hw_features
|= NETIF_F_LRO
;
931 dev
->vlan_features
= lowerdev
->vlan_features
& MACVLAN_FEATURES
;
932 dev
->vlan_features
|= ALWAYS_ON_OFFLOADS
;
933 dev
->hw_enc_features
|= dev
->features
;
934 netif_inherit_tso_max(dev
, lowerdev
);
935 dev
->hard_header_len
= lowerdev
->hard_header_len
;
936 macvlan_set_lockdep_class(dev
);
938 vlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct vlan_pcpu_stats
);
939 if (!vlan
->pcpu_stats
)
944 /* Get macvlan's reference to lowerdev */
945 netdev_hold(lowerdev
, &vlan
->dev_tracker
, GFP_KERNEL
);
950 static void macvlan_uninit(struct net_device
*dev
)
952 struct macvlan_dev
*vlan
= netdev_priv(dev
);
953 struct macvlan_port
*port
= vlan
->port
;
955 free_percpu(vlan
->pcpu_stats
);
957 macvlan_flush_sources(port
, vlan
);
960 macvlan_port_destroy(port
->dev
);
963 static void macvlan_dev_get_stats64(struct net_device
*dev
,
964 struct rtnl_link_stats64
*stats
)
966 struct macvlan_dev
*vlan
= netdev_priv(dev
);
968 if (vlan
->pcpu_stats
) {
969 struct vlan_pcpu_stats
*p
;
970 u64 rx_packets
, rx_bytes
, rx_multicast
, tx_packets
, tx_bytes
;
971 u32 rx_errors
= 0, tx_dropped
= 0;
975 for_each_possible_cpu(i
) {
976 p
= per_cpu_ptr(vlan
->pcpu_stats
, i
);
978 start
= u64_stats_fetch_begin(&p
->syncp
);
979 rx_packets
= u64_stats_read(&p
->rx_packets
);
980 rx_bytes
= u64_stats_read(&p
->rx_bytes
);
981 rx_multicast
= u64_stats_read(&p
->rx_multicast
);
982 tx_packets
= u64_stats_read(&p
->tx_packets
);
983 tx_bytes
= u64_stats_read(&p
->tx_bytes
);
984 } while (u64_stats_fetch_retry(&p
->syncp
, start
));
986 stats
->rx_packets
+= rx_packets
;
987 stats
->rx_bytes
+= rx_bytes
;
988 stats
->multicast
+= rx_multicast
;
989 stats
->tx_packets
+= tx_packets
;
990 stats
->tx_bytes
+= tx_bytes
;
991 /* rx_errors & tx_dropped are u32, updated
992 * without syncp protection.
994 rx_errors
+= READ_ONCE(p
->rx_errors
);
995 tx_dropped
+= READ_ONCE(p
->tx_dropped
);
997 stats
->rx_errors
= rx_errors
;
998 stats
->rx_dropped
= rx_errors
;
999 stats
->tx_dropped
= tx_dropped
;
1003 static int macvlan_vlan_rx_add_vid(struct net_device
*dev
,
1004 __be16 proto
, u16 vid
)
1006 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1007 struct net_device
*lowerdev
= vlan
->lowerdev
;
1009 return vlan_vid_add(lowerdev
, proto
, vid
);
1012 static int macvlan_vlan_rx_kill_vid(struct net_device
*dev
,
1013 __be16 proto
, u16 vid
)
1015 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1016 struct net_device
*lowerdev
= vlan
->lowerdev
;
1018 vlan_vid_del(lowerdev
, proto
, vid
);
1022 static int macvlan_fdb_add(struct ndmsg
*ndm
, struct nlattr
*tb
[],
1023 struct net_device
*dev
,
1024 const unsigned char *addr
, u16 vid
,
1026 struct netlink_ext_ack
*extack
)
1028 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1031 /* Support unicast filter only on passthru devices.
1032 * Multicast filter should be allowed on all devices.
1034 if (!macvlan_passthru(vlan
->port
) && is_unicast_ether_addr(addr
))
1037 if (flags
& NLM_F_REPLACE
)
1040 if (is_unicast_ether_addr(addr
))
1041 err
= dev_uc_add_excl(dev
, addr
);
1042 else if (is_multicast_ether_addr(addr
))
1043 err
= dev_mc_add_excl(dev
, addr
);
1048 static int macvlan_fdb_del(struct ndmsg
*ndm
, struct nlattr
*tb
[],
1049 struct net_device
*dev
,
1050 const unsigned char *addr
, u16 vid
,
1051 struct netlink_ext_ack
*extack
)
1053 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1056 /* Support unicast filter only on passthru devices.
1057 * Multicast filter should be allowed on all devices.
1059 if (!macvlan_passthru(vlan
->port
) && is_unicast_ether_addr(addr
))
1062 if (is_unicast_ether_addr(addr
))
1063 err
= dev_uc_del(dev
, addr
);
1064 else if (is_multicast_ether_addr(addr
))
1065 err
= dev_mc_del(dev
, addr
);
1070 static void macvlan_ethtool_get_drvinfo(struct net_device
*dev
,
1071 struct ethtool_drvinfo
*drvinfo
)
1073 strscpy(drvinfo
->driver
, "macvlan", sizeof(drvinfo
->driver
));
1074 strscpy(drvinfo
->version
, "0.1", sizeof(drvinfo
->version
));
1077 static int macvlan_ethtool_get_link_ksettings(struct net_device
*dev
,
1078 struct ethtool_link_ksettings
*cmd
)
1080 const struct macvlan_dev
*vlan
= netdev_priv(dev
);
1082 return __ethtool_get_link_ksettings(vlan
->lowerdev
, cmd
);
1085 static int macvlan_ethtool_get_ts_info(struct net_device
*dev
,
1086 struct ethtool_ts_info
*info
)
1088 struct net_device
*real_dev
= macvlan_dev_real_dev(dev
);
1089 const struct ethtool_ops
*ops
= real_dev
->ethtool_ops
;
1090 struct phy_device
*phydev
= real_dev
->phydev
;
1092 if (phy_has_tsinfo(phydev
)) {
1093 return phy_ts_info(phydev
, info
);
1094 } else if (ops
->get_ts_info
) {
1095 return ops
->get_ts_info(real_dev
, info
);
1097 info
->so_timestamping
= SOF_TIMESTAMPING_RX_SOFTWARE
|
1098 SOF_TIMESTAMPING_SOFTWARE
;
1099 info
->phc_index
= -1;
1105 static netdev_features_t
macvlan_fix_features(struct net_device
*dev
,
1106 netdev_features_t features
)
1108 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1109 netdev_features_t lowerdev_features
= vlan
->lowerdev
->features
;
1110 netdev_features_t mask
;
1112 features
|= NETIF_F_ALL_FOR_ALL
;
1113 features
&= (vlan
->set_features
| ~MACVLAN_FEATURES
);
1116 lowerdev_features
&= (features
| ~NETIF_F_LRO
);
1117 features
= netdev_increment_features(lowerdev_features
, features
, mask
);
1118 features
|= ALWAYS_ON_FEATURES
;
1119 features
&= (ALWAYS_ON_FEATURES
| MACVLAN_FEATURES
);
1124 #ifdef CONFIG_NET_POLL_CONTROLLER
1125 static void macvlan_dev_poll_controller(struct net_device
*dev
)
1130 static int macvlan_dev_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*npinfo
)
1132 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1133 struct net_device
*real_dev
= vlan
->lowerdev
;
1134 struct netpoll
*netpoll
;
1137 netpoll
= kzalloc(sizeof(*netpoll
), GFP_KERNEL
);
1142 err
= __netpoll_setup(netpoll
, real_dev
);
1148 vlan
->netpoll
= netpoll
;
1154 static void macvlan_dev_netpoll_cleanup(struct net_device
*dev
)
1156 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1157 struct netpoll
*netpoll
= vlan
->netpoll
;
1162 vlan
->netpoll
= NULL
;
1164 __netpoll_free(netpoll
);
1166 #endif /* CONFIG_NET_POLL_CONTROLLER */
1168 static int macvlan_dev_get_iflink(const struct net_device
*dev
)
1170 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1172 return vlan
->lowerdev
->ifindex
;
1175 static const struct ethtool_ops macvlan_ethtool_ops
= {
1176 .get_link
= ethtool_op_get_link
,
1177 .get_link_ksettings
= macvlan_ethtool_get_link_ksettings
,
1178 .get_drvinfo
= macvlan_ethtool_get_drvinfo
,
1179 .get_ts_info
= macvlan_ethtool_get_ts_info
,
1182 static const struct net_device_ops macvlan_netdev_ops
= {
1183 .ndo_init
= macvlan_init
,
1184 .ndo_uninit
= macvlan_uninit
,
1185 .ndo_open
= macvlan_open
,
1186 .ndo_stop
= macvlan_stop
,
1187 .ndo_start_xmit
= macvlan_start_xmit
,
1188 .ndo_change_mtu
= macvlan_change_mtu
,
1189 .ndo_fix_features
= macvlan_fix_features
,
1190 .ndo_change_rx_flags
= macvlan_change_rx_flags
,
1191 .ndo_set_mac_address
= macvlan_set_mac_address
,
1192 .ndo_set_rx_mode
= macvlan_set_mac_lists
,
1193 .ndo_get_stats64
= macvlan_dev_get_stats64
,
1194 .ndo_validate_addr
= eth_validate_addr
,
1195 .ndo_vlan_rx_add_vid
= macvlan_vlan_rx_add_vid
,
1196 .ndo_vlan_rx_kill_vid
= macvlan_vlan_rx_kill_vid
,
1197 .ndo_fdb_add
= macvlan_fdb_add
,
1198 .ndo_fdb_del
= macvlan_fdb_del
,
1199 .ndo_fdb_dump
= ndo_dflt_fdb_dump
,
1200 #ifdef CONFIG_NET_POLL_CONTROLLER
1201 .ndo_poll_controller
= macvlan_dev_poll_controller
,
1202 .ndo_netpoll_setup
= macvlan_dev_netpoll_setup
,
1203 .ndo_netpoll_cleanup
= macvlan_dev_netpoll_cleanup
,
1205 .ndo_get_iflink
= macvlan_dev_get_iflink
,
1206 .ndo_features_check
= passthru_features_check
,
1207 .ndo_hwtstamp_get
= macvlan_hwtstamp_get
,
1208 .ndo_hwtstamp_set
= macvlan_hwtstamp_set
,
1211 static void macvlan_dev_free(struct net_device
*dev
)
1213 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1215 /* Get rid of the macvlan's reference to lowerdev */
1216 netdev_put(vlan
->lowerdev
, &vlan
->dev_tracker
);
1219 void macvlan_common_setup(struct net_device
*dev
)
1223 /* ether_setup() has set dev->min_mtu to ETH_MIN_MTU. */
1224 dev
->max_mtu
= ETH_MAX_MTU
;
1225 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1226 netif_keep_dst(dev
);
1227 dev
->priv_flags
|= IFF_UNICAST_FLT
| IFF_CHANGE_PROTO_DOWN
;
1228 dev
->netdev_ops
= &macvlan_netdev_ops
;
1229 dev
->needs_free_netdev
= true;
1230 dev
->priv_destructor
= macvlan_dev_free
;
1231 dev
->header_ops
= &macvlan_hard_header_ops
;
1232 dev
->ethtool_ops
= &macvlan_ethtool_ops
;
1234 EXPORT_SYMBOL_GPL(macvlan_common_setup
);
1236 static void macvlan_setup(struct net_device
*dev
)
1238 macvlan_common_setup(dev
);
1239 dev
->priv_flags
|= IFF_NO_QUEUE
;
1242 static int macvlan_port_create(struct net_device
*dev
)
1244 struct macvlan_port
*port
;
1248 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
)
1251 if (netdev_is_rx_handler_busy(dev
))
1254 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
1259 ether_addr_copy(port
->perm_addr
, dev
->dev_addr
);
1260 INIT_LIST_HEAD(&port
->vlans
);
1261 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1262 INIT_HLIST_HEAD(&port
->vlan_hash
[i
]);
1263 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++)
1264 INIT_HLIST_HEAD(&port
->vlan_source_hash
[i
]);
1266 port
->bc_queue_len_used
= 0;
1267 port
->bc_cutoff
= 1;
1268 skb_queue_head_init(&port
->bc_queue
);
1269 INIT_WORK(&port
->bc_work
, macvlan_process_broadcast
);
1271 err
= netdev_rx_handler_register(dev
, macvlan_handle_frame
, port
);
1275 dev
->priv_flags
|= IFF_MACVLAN_PORT
;
1279 static void macvlan_port_destroy(struct net_device
*dev
)
1281 struct macvlan_port
*port
= macvlan_port_get_rtnl(dev
);
1282 struct sk_buff
*skb
;
1284 dev
->priv_flags
&= ~IFF_MACVLAN_PORT
;
1285 netdev_rx_handler_unregister(dev
);
1287 /* After this point, no packet can schedule bc_work anymore,
1288 * but we need to cancel it and purge left skbs if any.
1290 cancel_work_sync(&port
->bc_work
);
1292 while ((skb
= __skb_dequeue(&port
->bc_queue
))) {
1293 const struct macvlan_dev
*src
= MACVLAN_SKB_CB(skb
)->src
;
1301 /* If the lower device address has been changed by passthru
1302 * macvlan, put it back.
1304 if (macvlan_passthru(port
) &&
1305 !ether_addr_equal(port
->dev
->dev_addr
, port
->perm_addr
)) {
1308 sa
.sa_family
= port
->dev
->type
;
1309 memcpy(&sa
.sa_data
, port
->perm_addr
, port
->dev
->addr_len
);
1310 dev_set_mac_address(port
->dev
, &sa
, NULL
);
1316 static int macvlan_validate(struct nlattr
*tb
[], struct nlattr
*data
[],
1317 struct netlink_ext_ack
*extack
)
1319 struct nlattr
*nla
, *head
;
1322 if (tb
[IFLA_ADDRESS
]) {
1323 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
1325 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
1326 return -EADDRNOTAVAIL
;
1332 if (data
[IFLA_MACVLAN_FLAGS
] &&
1333 nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]) & ~(MACVLAN_FLAG_NOPROMISC
|
1334 MACVLAN_FLAG_NODST
))
1337 if (data
[IFLA_MACVLAN_MODE
]) {
1338 switch (nla_get_u32(data
[IFLA_MACVLAN_MODE
])) {
1339 case MACVLAN_MODE_PRIVATE
:
1340 case MACVLAN_MODE_VEPA
:
1341 case MACVLAN_MODE_BRIDGE
:
1342 case MACVLAN_MODE_PASSTHRU
:
1343 case MACVLAN_MODE_SOURCE
:
1350 if (data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1351 switch (nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
])) {
1352 case MACVLAN_MACADDR_ADD
:
1353 case MACVLAN_MACADDR_DEL
:
1354 case MACVLAN_MACADDR_FLUSH
:
1355 case MACVLAN_MACADDR_SET
:
1362 if (data
[IFLA_MACVLAN_MACADDR
]) {
1363 if (nla_len(data
[IFLA_MACVLAN_MACADDR
]) != ETH_ALEN
)
1366 if (!is_valid_ether_addr(nla_data(data
[IFLA_MACVLAN_MACADDR
])))
1367 return -EADDRNOTAVAIL
;
1370 if (data
[IFLA_MACVLAN_MACADDR_DATA
]) {
1371 head
= nla_data(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1372 len
= nla_len(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1374 nla_for_each_attr(nla
, head
, len
, rem
) {
1375 if (nla_type(nla
) != IFLA_MACVLAN_MACADDR
||
1376 nla_len(nla
) != ETH_ALEN
)
1379 if (!is_valid_ether_addr(nla_data(nla
)))
1380 return -EADDRNOTAVAIL
;
1384 if (data
[IFLA_MACVLAN_MACADDR_COUNT
])
1391 * reconfigure list of remote source mac address
1392 * (only for macvlan devices in source mode)
1393 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1394 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1396 static int macvlan_changelink_sources(struct macvlan_dev
*vlan
, u32 mode
,
1397 struct nlattr
*data
[])
1401 struct nlattr
*nla
, *head
;
1402 struct macvlan_source_entry
*entry
;
1404 if (data
[IFLA_MACVLAN_MACADDR
])
1405 addr
= nla_data(data
[IFLA_MACVLAN_MACADDR
]);
1407 if (mode
== MACVLAN_MACADDR_ADD
) {
1411 return macvlan_hash_add_source(vlan
, addr
);
1413 } else if (mode
== MACVLAN_MACADDR_DEL
) {
1417 entry
= macvlan_hash_lookup_source(vlan
, addr
);
1419 macvlan_hash_del_source(entry
);
1420 vlan
->macaddr_count
--;
1422 } else if (mode
== MACVLAN_MACADDR_FLUSH
) {
1423 macvlan_flush_sources(vlan
->port
, vlan
);
1424 } else if (mode
== MACVLAN_MACADDR_SET
) {
1425 macvlan_flush_sources(vlan
->port
, vlan
);
1428 ret
= macvlan_hash_add_source(vlan
, addr
);
1433 if (!data
[IFLA_MACVLAN_MACADDR_DATA
])
1436 head
= nla_data(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1437 len
= nla_len(data
[IFLA_MACVLAN_MACADDR_DATA
]);
1439 nla_for_each_attr(nla
, head
, len
, rem
) {
1440 addr
= nla_data(nla
);
1441 ret
= macvlan_hash_add_source(vlan
, addr
);
1452 int macvlan_common_newlink(struct net
*src_net
, struct net_device
*dev
,
1453 struct nlattr
*tb
[], struct nlattr
*data
[],
1454 struct netlink_ext_ack
*extack
)
1456 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1457 struct macvlan_port
*port
;
1458 struct net_device
*lowerdev
;
1461 bool create
= false;
1466 lowerdev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
1467 if (lowerdev
== NULL
)
1470 /* When creating macvlans or macvtaps on top of other macvlans - use
1471 * the real device as the lowerdev.
1473 if (netif_is_macvlan(lowerdev
))
1474 lowerdev
= macvlan_dev_real_dev(lowerdev
);
1477 dev
->mtu
= lowerdev
->mtu
;
1478 else if (dev
->mtu
> lowerdev
->mtu
)
1481 /* MTU range: 68 - lowerdev->max_mtu */
1482 dev
->min_mtu
= ETH_MIN_MTU
;
1483 dev
->max_mtu
= lowerdev
->max_mtu
;
1485 if (!tb
[IFLA_ADDRESS
])
1486 eth_hw_addr_random(dev
);
1488 if (!netif_is_macvlan_port(lowerdev
)) {
1489 err
= macvlan_port_create(lowerdev
);
1494 port
= macvlan_port_get_rtnl(lowerdev
);
1496 /* Only 1 macvlan device can be created in passthru mode */
1497 if (macvlan_passthru(port
)) {
1498 /* The macvlan port must be not created this time,
1499 * still goto destroy_macvlan_port for readability.
1502 goto destroy_macvlan_port
;
1505 vlan
->lowerdev
= lowerdev
;
1508 vlan
->set_features
= MACVLAN_FEATURES
;
1510 vlan
->mode
= MACVLAN_MODE_VEPA
;
1511 if (data
&& data
[IFLA_MACVLAN_MODE
])
1512 vlan
->mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1514 if (data
&& data
[IFLA_MACVLAN_FLAGS
])
1515 vlan
->flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1517 if (vlan
->mode
== MACVLAN_MODE_PASSTHRU
) {
1520 goto destroy_macvlan_port
;
1522 macvlan_set_passthru(port
);
1523 eth_hw_addr_inherit(dev
, lowerdev
);
1526 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1527 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
) {
1529 goto destroy_macvlan_port
;
1531 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1532 err
= macvlan_changelink_sources(vlan
, macmode
, data
);
1534 goto destroy_macvlan_port
;
1537 vlan
->bc_queue_len_req
= MACVLAN_DEFAULT_BC_QUEUE_LEN
;
1538 if (data
&& data
[IFLA_MACVLAN_BC_QUEUE_LEN
])
1539 vlan
->bc_queue_len_req
= nla_get_u32(data
[IFLA_MACVLAN_BC_QUEUE_LEN
]);
1541 if (data
&& data
[IFLA_MACVLAN_BC_CUTOFF
])
1542 update_port_bc_cutoff(
1543 vlan
, nla_get_s32(data
[IFLA_MACVLAN_BC_CUTOFF
]));
1545 err
= register_netdevice(dev
);
1547 goto destroy_macvlan_port
;
1549 dev
->priv_flags
|= IFF_MACVLAN
;
1550 err
= netdev_upper_dev_link(lowerdev
, dev
, extack
);
1552 goto unregister_netdev
;
1554 list_add_tail_rcu(&vlan
->list
, &port
->vlans
);
1555 update_port_bc_queue_len(vlan
->port
);
1556 netif_stacked_transfer_operstate(lowerdev
, dev
);
1557 linkwatch_fire_event(dev
);
1562 /* macvlan_uninit would free the macvlan port */
1563 unregister_netdevice(dev
);
1565 destroy_macvlan_port
:
1566 /* the macvlan port may be freed by macvlan_uninit when fail to register.
1567 * so we destroy the macvlan port only when it's valid.
1569 if (create
&& macvlan_port_get_rtnl(lowerdev
)) {
1570 macvlan_flush_sources(port
, vlan
);
1571 macvlan_port_destroy(port
->dev
);
1575 EXPORT_SYMBOL_GPL(macvlan_common_newlink
);
1577 static int macvlan_newlink(struct net
*src_net
, struct net_device
*dev
,
1578 struct nlattr
*tb
[], struct nlattr
*data
[],
1579 struct netlink_ext_ack
*extack
)
1581 return macvlan_common_newlink(src_net
, dev
, tb
, data
, extack
);
1584 void macvlan_dellink(struct net_device
*dev
, struct list_head
*head
)
1586 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1588 if (vlan
->mode
== MACVLAN_MODE_SOURCE
)
1589 macvlan_flush_sources(vlan
->port
, vlan
);
1590 list_del_rcu(&vlan
->list
);
1591 update_port_bc_queue_len(vlan
->port
);
1592 unregister_netdevice_queue(dev
, head
);
1593 netdev_upper_dev_unlink(vlan
->lowerdev
, dev
);
1595 EXPORT_SYMBOL_GPL(macvlan_dellink
);
1597 static int macvlan_changelink(struct net_device
*dev
,
1598 struct nlattr
*tb
[], struct nlattr
*data
[],
1599 struct netlink_ext_ack
*extack
)
1601 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1602 enum macvlan_mode mode
;
1603 bool set_mode
= false;
1604 enum macvlan_macaddr_mode macmode
;
1607 /* Validate mode, but don't set yet: setting flags may fail. */
1608 if (data
&& data
[IFLA_MACVLAN_MODE
]) {
1610 mode
= nla_get_u32(data
[IFLA_MACVLAN_MODE
]);
1611 /* Passthrough mode can't be set or cleared dynamically */
1612 if ((mode
== MACVLAN_MODE_PASSTHRU
) !=
1613 (vlan
->mode
== MACVLAN_MODE_PASSTHRU
))
1615 if (vlan
->mode
== MACVLAN_MODE_SOURCE
&&
1617 macvlan_flush_sources(vlan
->port
, vlan
);
1620 if (data
&& data
[IFLA_MACVLAN_FLAGS
]) {
1621 __u16 flags
= nla_get_u16(data
[IFLA_MACVLAN_FLAGS
]);
1622 bool promisc
= (flags
^ vlan
->flags
) & MACVLAN_FLAG_NOPROMISC
;
1623 if (macvlan_passthru(vlan
->port
) && promisc
) {
1626 if (flags
& MACVLAN_FLAG_NOPROMISC
)
1627 err
= dev_set_promiscuity(vlan
->lowerdev
, -1);
1629 err
= dev_set_promiscuity(vlan
->lowerdev
, 1);
1633 vlan
->flags
= flags
;
1636 if (data
&& data
[IFLA_MACVLAN_BC_QUEUE_LEN
]) {
1637 vlan
->bc_queue_len_req
= nla_get_u32(data
[IFLA_MACVLAN_BC_QUEUE_LEN
]);
1638 update_port_bc_queue_len(vlan
->port
);
1641 if (data
&& data
[IFLA_MACVLAN_BC_CUTOFF
])
1642 update_port_bc_cutoff(
1643 vlan
, nla_get_s32(data
[IFLA_MACVLAN_BC_CUTOFF
]));
1647 if (data
&& data
[IFLA_MACVLAN_MACADDR_MODE
]) {
1648 if (vlan
->mode
!= MACVLAN_MODE_SOURCE
)
1650 macmode
= nla_get_u32(data
[IFLA_MACVLAN_MACADDR_MODE
]);
1651 ret
= macvlan_changelink_sources(vlan
, macmode
, data
);
1658 static size_t macvlan_get_size_mac(const struct macvlan_dev
*vlan
)
1660 if (vlan
->macaddr_count
== 0)
1662 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1663 + vlan
->macaddr_count
* nla_total_size(sizeof(u8
) * ETH_ALEN
);
1666 static size_t macvlan_get_size(const struct net_device
*dev
)
1668 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1671 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1672 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
1673 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1674 + macvlan_get_size_mac(vlan
) /* IFLA_MACVLAN_MACADDR */
1675 + nla_total_size(4) /* IFLA_MACVLAN_BC_QUEUE_LEN */
1676 + nla_total_size(4) /* IFLA_MACVLAN_BC_QUEUE_LEN_USED */
1680 static int macvlan_fill_info_macaddr(struct sk_buff
*skb
,
1681 const struct macvlan_dev
*vlan
,
1684 struct hlist_head
*h
= &vlan
->port
->vlan_source_hash
[i
];
1685 struct macvlan_source_entry
*entry
;
1687 hlist_for_each_entry_rcu(entry
, h
, hlist
, lockdep_rtnl_is_held()) {
1688 if (entry
->vlan
!= vlan
)
1690 if (nla_put(skb
, IFLA_MACVLAN_MACADDR
, ETH_ALEN
, entry
->addr
))
1696 static int macvlan_fill_info(struct sk_buff
*skb
,
1697 const struct net_device
*dev
)
1699 struct macvlan_dev
*vlan
= netdev_priv(dev
);
1700 struct macvlan_port
*port
= vlan
->port
;
1702 struct nlattr
*nest
;
1704 if (nla_put_u32(skb
, IFLA_MACVLAN_MODE
, vlan
->mode
))
1705 goto nla_put_failure
;
1706 if (nla_put_u16(skb
, IFLA_MACVLAN_FLAGS
, vlan
->flags
))
1707 goto nla_put_failure
;
1708 if (nla_put_u32(skb
, IFLA_MACVLAN_MACADDR_COUNT
, vlan
->macaddr_count
))
1709 goto nla_put_failure
;
1710 if (vlan
->macaddr_count
> 0) {
1711 nest
= nla_nest_start_noflag(skb
, IFLA_MACVLAN_MACADDR_DATA
);
1713 goto nla_put_failure
;
1715 for (i
= 0; i
< MACVLAN_HASH_SIZE
; i
++) {
1716 if (macvlan_fill_info_macaddr(skb
, vlan
, i
))
1717 goto nla_put_failure
;
1719 nla_nest_end(skb
, nest
);
1721 if (nla_put_u32(skb
, IFLA_MACVLAN_BC_QUEUE_LEN
, vlan
->bc_queue_len_req
))
1722 goto nla_put_failure
;
1723 if (nla_put_u32(skb
, IFLA_MACVLAN_BC_QUEUE_LEN_USED
, port
->bc_queue_len_used
))
1724 goto nla_put_failure
;
1725 if (port
->bc_cutoff
!= 1 &&
1726 nla_put_s32(skb
, IFLA_MACVLAN_BC_CUTOFF
, port
->bc_cutoff
))
1727 goto nla_put_failure
;
1734 static const struct nla_policy macvlan_policy
[IFLA_MACVLAN_MAX
+ 1] = {
1735 [IFLA_MACVLAN_MODE
] = { .type
= NLA_U32
},
1736 [IFLA_MACVLAN_FLAGS
] = { .type
= NLA_U16
},
1737 [IFLA_MACVLAN_MACADDR_MODE
] = { .type
= NLA_U32
},
1738 [IFLA_MACVLAN_MACADDR
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1739 [IFLA_MACVLAN_MACADDR_DATA
] = { .type
= NLA_NESTED
},
1740 [IFLA_MACVLAN_MACADDR_COUNT
] = { .type
= NLA_U32
},
1741 [IFLA_MACVLAN_BC_QUEUE_LEN
] = { .type
= NLA_U32
},
1742 [IFLA_MACVLAN_BC_QUEUE_LEN_USED
] = { .type
= NLA_REJECT
},
1743 [IFLA_MACVLAN_BC_CUTOFF
] = { .type
= NLA_S32
},
1746 int macvlan_link_register(struct rtnl_link_ops
*ops
)
1749 ops
->validate
= macvlan_validate
;
1750 ops
->maxtype
= IFLA_MACVLAN_MAX
;
1751 ops
->policy
= macvlan_policy
;
1752 ops
->changelink
= macvlan_changelink
;
1753 ops
->get_size
= macvlan_get_size
;
1754 ops
->fill_info
= macvlan_fill_info
;
1756 return rtnl_link_register(ops
);
1758 EXPORT_SYMBOL_GPL(macvlan_link_register
);
1760 static struct net
*macvlan_get_link_net(const struct net_device
*dev
)
1762 return dev_net(macvlan_dev_real_dev(dev
));
1765 static struct rtnl_link_ops macvlan_link_ops
= {
1767 .setup
= macvlan_setup
,
1768 .newlink
= macvlan_newlink
,
1769 .dellink
= macvlan_dellink
,
1770 .get_link_net
= macvlan_get_link_net
,
1771 .priv_size
= sizeof(struct macvlan_dev
),
1774 static void update_port_bc_queue_len(struct macvlan_port
*port
)
1776 u32 max_bc_queue_len_req
= 0;
1777 struct macvlan_dev
*vlan
;
1779 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1780 if (vlan
->bc_queue_len_req
> max_bc_queue_len_req
)
1781 max_bc_queue_len_req
= vlan
->bc_queue_len_req
;
1783 port
->bc_queue_len_used
= max_bc_queue_len_req
;
1786 static int macvlan_device_event(struct notifier_block
*unused
,
1787 unsigned long event
, void *ptr
)
1789 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1790 struct macvlan_dev
*vlan
, *next
;
1791 struct macvlan_port
*port
;
1792 LIST_HEAD(list_kill
);
1794 if (!netif_is_macvlan_port(dev
))
1797 port
= macvlan_port_get_rtnl(dev
);
1803 list_for_each_entry(vlan
, &port
->vlans
, list
)
1804 netif_stacked_transfer_operstate(vlan
->lowerdev
,
1807 case NETDEV_FEAT_CHANGE
:
1808 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1809 netif_inherit_tso_max(vlan
->dev
, dev
);
1810 netdev_update_features(vlan
->dev
);
1813 case NETDEV_CHANGEMTU
:
1814 list_for_each_entry(vlan
, &port
->vlans
, list
) {
1815 if (vlan
->dev
->mtu
<= dev
->mtu
)
1817 dev_set_mtu(vlan
->dev
, dev
->mtu
);
1820 case NETDEV_CHANGEADDR
:
1821 if (!macvlan_passthru(port
))
1824 vlan
= list_first_entry_or_null(&port
->vlans
,
1828 if (vlan
&& macvlan_sync_address(vlan
->dev
, dev
->dev_addr
))
1832 case NETDEV_UNREGISTER
:
1833 /* twiddle thumbs on netns device moves */
1834 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
1837 list_for_each_entry_safe(vlan
, next
, &port
->vlans
, list
)
1838 vlan
->dev
->rtnl_link_ops
->dellink(vlan
->dev
, &list_kill
);
1839 unregister_netdevice_many(&list_kill
);
1841 case NETDEV_PRE_TYPE_CHANGE
:
1842 /* Forbid underlying device to change its type. */
1845 case NETDEV_NOTIFY_PEERS
:
1846 case NETDEV_BONDING_FAILOVER
:
1847 case NETDEV_RESEND_IGMP
:
1848 /* Propagate to all vlans */
1849 list_for_each_entry(vlan
, &port
->vlans
, list
)
1850 call_netdevice_notifiers(event
, vlan
->dev
);
1855 static struct notifier_block macvlan_notifier_block __read_mostly
= {
1856 .notifier_call
= macvlan_device_event
,
1859 static int __init
macvlan_init_module(void)
1863 register_netdevice_notifier(&macvlan_notifier_block
);
1865 err
= macvlan_link_register(&macvlan_link_ops
);
1870 unregister_netdevice_notifier(&macvlan_notifier_block
);
1874 static void __exit
macvlan_cleanup_module(void)
1876 rtnl_link_unregister(&macvlan_link_ops
);
1877 unregister_netdevice_notifier(&macvlan_notifier_block
);
1880 module_init(macvlan_init_module
);
1881 module_exit(macvlan_cleanup_module
);
1883 MODULE_LICENSE("GPL");
1884 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1885 MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1886 MODULE_ALIAS_RTNL_LINK("macvlan");