1 /* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
12 void ipvlan_adjust_mtu(struct ipvl_dev
*ipvlan
, struct net_device
*dev
)
14 ipvlan
->dev
->mtu
= dev
->mtu
- ipvlan
->mtu_adj
;
17 void ipvlan_set_port_mode(struct ipvl_port
*port
, u32 nval
)
19 struct ipvl_dev
*ipvlan
;
21 if (port
->mode
!= nval
) {
22 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
) {
23 if (nval
== IPVLAN_MODE_L3
)
24 ipvlan
->dev
->flags
|= IFF_NOARP
;
26 ipvlan
->dev
->flags
&= ~IFF_NOARP
;
32 static int ipvlan_port_create(struct net_device
*dev
)
34 struct ipvl_port
*port
;
37 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
) {
38 netdev_err(dev
, "Master is either lo or non-ether device\n");
42 if (netif_is_macvlan_port(dev
)) {
43 netdev_err(dev
, "Master is a macvlan port.\n");
47 port
= kzalloc(sizeof(struct ipvl_port
), GFP_KERNEL
);
52 port
->mode
= IPVLAN_MODE_L3
;
53 INIT_LIST_HEAD(&port
->ipvlans
);
54 for (idx
= 0; idx
< IPVLAN_HASH_SIZE
; idx
++)
55 INIT_HLIST_HEAD(&port
->hlhead
[idx
]);
57 skb_queue_head_init(&port
->backlog
);
58 INIT_WORK(&port
->wq
, ipvlan_process_multicast
);
60 err
= netdev_rx_handler_register(dev
, ipvlan_handle_frame
, port
);
64 dev
->priv_flags
|= IFF_IPVLAN_MASTER
;
72 static void ipvlan_port_destroy(struct net_device
*dev
)
74 struct ipvl_port
*port
= ipvlan_port_get_rtnl(dev
);
76 dev
->priv_flags
&= ~IFF_IPVLAN_MASTER
;
77 netdev_rx_handler_unregister(dev
);
78 cancel_work_sync(&port
->wq
);
79 __skb_queue_purge(&port
->backlog
);
83 /* ipvlan network devices have devices nesting below it and are a special
84 * "super class" of normal network devices; split their locks off into a
85 * separate class since they always nest.
87 static struct lock_class_key ipvlan_netdev_xmit_lock_key
;
88 static struct lock_class_key ipvlan_netdev_addr_lock_key
;
90 #define IPVLAN_FEATURES \
91 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
92 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
93 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
94 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
96 #define IPVLAN_STATE_MASK \
97 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
99 static void ipvlan_set_lockdep_class_one(struct net_device
*dev
,
100 struct netdev_queue
*txq
,
103 lockdep_set_class(&txq
->_xmit_lock
, &ipvlan_netdev_xmit_lock_key
);
106 static void ipvlan_set_lockdep_class(struct net_device
*dev
)
108 lockdep_set_class(&dev
->addr_list_lock
, &ipvlan_netdev_addr_lock_key
);
109 netdev_for_each_tx_queue(dev
, ipvlan_set_lockdep_class_one
, NULL
);
112 static int ipvlan_init(struct net_device
*dev
)
114 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
115 const struct net_device
*phy_dev
= ipvlan
->phy_dev
;
117 dev
->state
= (dev
->state
& ~IPVLAN_STATE_MASK
) |
118 (phy_dev
->state
& IPVLAN_STATE_MASK
);
119 dev
->features
= phy_dev
->features
& IPVLAN_FEATURES
;
120 dev
->features
|= NETIF_F_LLTX
;
121 dev
->gso_max_size
= phy_dev
->gso_max_size
;
122 dev
->hard_header_len
= phy_dev
->hard_header_len
;
124 ipvlan_set_lockdep_class(dev
);
126 ipvlan
->pcpu_stats
= alloc_percpu(struct ipvl_pcpu_stats
);
127 if (!ipvlan
->pcpu_stats
)
133 static void ipvlan_uninit(struct net_device
*dev
)
135 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
136 struct ipvl_port
*port
= ipvlan
->port
;
138 free_percpu(ipvlan
->pcpu_stats
);
142 ipvlan_port_destroy(port
->dev
);
145 static int ipvlan_open(struct net_device
*dev
)
147 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
148 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
149 struct ipvl_addr
*addr
;
151 if (ipvlan
->port
->mode
== IPVLAN_MODE_L3
)
152 dev
->flags
|= IFF_NOARP
;
154 dev
->flags
&= ~IFF_NOARP
;
156 if (ipvlan
->ipv6cnt
> 0 || ipvlan
->ipv4cnt
> 0) {
157 list_for_each_entry(addr
, &ipvlan
->addrs
, anode
)
158 ipvlan_ht_addr_add(ipvlan
, addr
);
160 return dev_uc_add(phy_dev
, phy_dev
->dev_addr
);
163 static int ipvlan_stop(struct net_device
*dev
)
165 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
166 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
167 struct ipvl_addr
*addr
;
169 dev_uc_unsync(phy_dev
, dev
);
170 dev_mc_unsync(phy_dev
, dev
);
172 dev_uc_del(phy_dev
, phy_dev
->dev_addr
);
174 if (ipvlan
->ipv6cnt
> 0 || ipvlan
->ipv4cnt
> 0) {
175 list_for_each_entry(addr
, &ipvlan
->addrs
, anode
)
176 ipvlan_ht_addr_del(addr
, !dev
->dismantle
);
181 static netdev_tx_t
ipvlan_start_xmit(struct sk_buff
*skb
,
182 struct net_device
*dev
)
184 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
185 int skblen
= skb
->len
;
188 ret
= ipvlan_queue_xmit(skb
, dev
);
189 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
190 struct ipvl_pcpu_stats
*pcptr
;
192 pcptr
= this_cpu_ptr(ipvlan
->pcpu_stats
);
194 u64_stats_update_begin(&pcptr
->syncp
);
196 pcptr
->tx_bytes
+= skblen
;
197 u64_stats_update_end(&pcptr
->syncp
);
199 this_cpu_inc(ipvlan
->pcpu_stats
->tx_drps
);
204 static netdev_features_t
ipvlan_fix_features(struct net_device
*dev
,
205 netdev_features_t features
)
207 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
209 return features
& (ipvlan
->sfeatures
| ~IPVLAN_FEATURES
);
212 static void ipvlan_change_rx_flags(struct net_device
*dev
, int change
)
214 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
215 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
217 if (change
& IFF_ALLMULTI
)
218 dev_set_allmulti(phy_dev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
221 static void ipvlan_set_multicast_mac_filter(struct net_device
*dev
)
223 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
225 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
226 bitmap_fill(ipvlan
->mac_filters
, IPVLAN_MAC_FILTER_SIZE
);
228 struct netdev_hw_addr
*ha
;
229 DECLARE_BITMAP(mc_filters
, IPVLAN_MAC_FILTER_SIZE
);
231 bitmap_zero(mc_filters
, IPVLAN_MAC_FILTER_SIZE
);
232 netdev_for_each_mc_addr(ha
, dev
)
233 __set_bit(ipvlan_mac_hash(ha
->addr
), mc_filters
);
235 /* Turn-on broadcast bit irrespective of address family,
236 * since broadcast is deferred to a work-queue, hence no
237 * impact on fast-path processing.
239 __set_bit(ipvlan_mac_hash(dev
->broadcast
), mc_filters
);
241 bitmap_copy(ipvlan
->mac_filters
, mc_filters
,
242 IPVLAN_MAC_FILTER_SIZE
);
244 dev_uc_sync(ipvlan
->phy_dev
, dev
);
245 dev_mc_sync(ipvlan
->phy_dev
, dev
);
248 static struct rtnl_link_stats64
*ipvlan_get_stats64(struct net_device
*dev
,
249 struct rtnl_link_stats64
*s
)
251 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
253 if (ipvlan
->pcpu_stats
) {
254 struct ipvl_pcpu_stats
*pcptr
;
255 u64 rx_pkts
, rx_bytes
, rx_mcast
, tx_pkts
, tx_bytes
;
256 u32 rx_errs
= 0, tx_drps
= 0;
260 for_each_possible_cpu(idx
) {
261 pcptr
= per_cpu_ptr(ipvlan
->pcpu_stats
, idx
);
263 strt
= u64_stats_fetch_begin_irq(&pcptr
->syncp
);
264 rx_pkts
= pcptr
->rx_pkts
;
265 rx_bytes
= pcptr
->rx_bytes
;
266 rx_mcast
= pcptr
->rx_mcast
;
267 tx_pkts
= pcptr
->tx_pkts
;
268 tx_bytes
= pcptr
->tx_bytes
;
269 } while (u64_stats_fetch_retry_irq(&pcptr
->syncp
,
272 s
->rx_packets
+= rx_pkts
;
273 s
->rx_bytes
+= rx_bytes
;
274 s
->multicast
+= rx_mcast
;
275 s
->tx_packets
+= tx_pkts
;
276 s
->tx_bytes
+= tx_bytes
;
278 /* u32 values are updated without syncp protection. */
279 rx_errs
+= pcptr
->rx_errs
;
280 tx_drps
+= pcptr
->tx_drps
;
282 s
->rx_errors
= rx_errs
;
283 s
->rx_dropped
= rx_errs
;
284 s
->tx_dropped
= tx_drps
;
289 static int ipvlan_vlan_rx_add_vid(struct net_device
*dev
, __be16 proto
, u16 vid
)
291 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
292 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
294 return vlan_vid_add(phy_dev
, proto
, vid
);
297 static int ipvlan_vlan_rx_kill_vid(struct net_device
*dev
, __be16 proto
,
300 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
301 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
303 vlan_vid_del(phy_dev
, proto
, vid
);
307 static int ipvlan_get_iflink(const struct net_device
*dev
)
309 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
311 return ipvlan
->phy_dev
->ifindex
;
314 static const struct net_device_ops ipvlan_netdev_ops
= {
315 .ndo_init
= ipvlan_init
,
316 .ndo_uninit
= ipvlan_uninit
,
317 .ndo_open
= ipvlan_open
,
318 .ndo_stop
= ipvlan_stop
,
319 .ndo_start_xmit
= ipvlan_start_xmit
,
320 .ndo_fix_features
= ipvlan_fix_features
,
321 .ndo_change_rx_flags
= ipvlan_change_rx_flags
,
322 .ndo_set_rx_mode
= ipvlan_set_multicast_mac_filter
,
323 .ndo_get_stats64
= ipvlan_get_stats64
,
324 .ndo_vlan_rx_add_vid
= ipvlan_vlan_rx_add_vid
,
325 .ndo_vlan_rx_kill_vid
= ipvlan_vlan_rx_kill_vid
,
326 .ndo_get_iflink
= ipvlan_get_iflink
,
329 static int ipvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
330 unsigned short type
, const void *daddr
,
331 const void *saddr
, unsigned len
)
333 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
334 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
336 /* TODO Probably use a different field than dev_addr so that the
337 * mac-address on the virtual device is portable and can be carried
338 * while the packets use the mac-addr on the physical device.
340 return dev_hard_header(skb
, phy_dev
, type
, daddr
,
341 saddr
? : dev
->dev_addr
, len
);
344 static const struct header_ops ipvlan_header_ops
= {
345 .create
= ipvlan_hard_header
,
346 .parse
= eth_header_parse
,
347 .cache
= eth_header_cache
,
348 .cache_update
= eth_header_cache_update
,
351 static int ipvlan_ethtool_get_settings(struct net_device
*dev
,
352 struct ethtool_cmd
*cmd
)
354 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
356 return __ethtool_get_settings(ipvlan
->phy_dev
, cmd
);
359 static void ipvlan_ethtool_get_drvinfo(struct net_device
*dev
,
360 struct ethtool_drvinfo
*drvinfo
)
362 strlcpy(drvinfo
->driver
, IPVLAN_DRV
, sizeof(drvinfo
->driver
));
363 strlcpy(drvinfo
->version
, IPV_DRV_VER
, sizeof(drvinfo
->version
));
366 static u32
ipvlan_ethtool_get_msglevel(struct net_device
*dev
)
368 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
370 return ipvlan
->msg_enable
;
373 static void ipvlan_ethtool_set_msglevel(struct net_device
*dev
, u32 value
)
375 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
377 ipvlan
->msg_enable
= value
;
380 static const struct ethtool_ops ipvlan_ethtool_ops
= {
381 .get_link
= ethtool_op_get_link
,
382 .get_settings
= ipvlan_ethtool_get_settings
,
383 .get_drvinfo
= ipvlan_ethtool_get_drvinfo
,
384 .get_msglevel
= ipvlan_ethtool_get_msglevel
,
385 .set_msglevel
= ipvlan_ethtool_set_msglevel
,
388 static int ipvlan_nl_changelink(struct net_device
*dev
,
389 struct nlattr
*tb
[], struct nlattr
*data
[])
391 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
392 struct ipvl_port
*port
= ipvlan_port_get_rtnl(ipvlan
->phy_dev
);
394 if (data
&& data
[IFLA_IPVLAN_MODE
]) {
395 u16 nmode
= nla_get_u16(data
[IFLA_IPVLAN_MODE
]);
397 ipvlan_set_port_mode(port
, nmode
);
402 static size_t ipvlan_nl_getsize(const struct net_device
*dev
)
405 + nla_total_size(2) /* IFLA_IPVLAN_MODE */
409 static int ipvlan_nl_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
411 if (data
&& data
[IFLA_IPVLAN_MODE
]) {
412 u16 mode
= nla_get_u16(data
[IFLA_IPVLAN_MODE
]);
414 if (mode
< IPVLAN_MODE_L2
|| mode
>= IPVLAN_MODE_MAX
)
420 static int ipvlan_nl_fillinfo(struct sk_buff
*skb
,
421 const struct net_device
*dev
)
423 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
424 struct ipvl_port
*port
= ipvlan_port_get_rtnl(ipvlan
->phy_dev
);
431 if (nla_put_u16(skb
, IFLA_IPVLAN_MODE
, port
->mode
))
440 static int ipvlan_link_new(struct net
*src_net
, struct net_device
*dev
,
441 struct nlattr
*tb
[], struct nlattr
*data
[])
443 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
444 struct ipvl_port
*port
;
445 struct net_device
*phy_dev
;
451 phy_dev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
455 if (netif_is_ipvlan(phy_dev
)) {
456 struct ipvl_dev
*tmp
= netdev_priv(phy_dev
);
458 phy_dev
= tmp
->phy_dev
;
459 } else if (!netif_is_ipvlan_port(phy_dev
)) {
460 err
= ipvlan_port_create(phy_dev
);
465 port
= ipvlan_port_get_rtnl(phy_dev
);
466 if (data
&& data
[IFLA_IPVLAN_MODE
])
467 port
->mode
= nla_get_u16(data
[IFLA_IPVLAN_MODE
]);
469 ipvlan
->phy_dev
= phy_dev
;
472 ipvlan
->sfeatures
= IPVLAN_FEATURES
;
473 INIT_LIST_HEAD(&ipvlan
->addrs
);
477 /* TODO Probably put random address here to be presented to the
478 * world but keep using the physical-dev address for the outgoing
481 memcpy(dev
->dev_addr
, phy_dev
->dev_addr
, ETH_ALEN
);
483 dev
->priv_flags
|= IFF_IPVLAN_SLAVE
;
486 err
= register_netdevice(dev
);
488 goto ipvlan_destroy_port
;
490 err
= netdev_upper_dev_link(phy_dev
, dev
);
492 goto ipvlan_destroy_port
;
494 list_add_tail_rcu(&ipvlan
->pnode
, &port
->ipvlans
);
495 netif_stacked_transfer_operstate(phy_dev
, dev
);
501 ipvlan_port_destroy(phy_dev
);
506 static void ipvlan_link_delete(struct net_device
*dev
, struct list_head
*head
)
508 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
509 struct ipvl_addr
*addr
, *next
;
511 if (ipvlan
->ipv6cnt
> 0 || ipvlan
->ipv4cnt
> 0) {
512 list_for_each_entry_safe(addr
, next
, &ipvlan
->addrs
, anode
) {
513 ipvlan_ht_addr_del(addr
, !dev
->dismantle
);
514 list_del(&addr
->anode
);
517 list_del_rcu(&ipvlan
->pnode
);
518 unregister_netdevice_queue(dev
, head
);
519 netdev_upper_dev_unlink(ipvlan
->phy_dev
, dev
);
522 static void ipvlan_link_setup(struct net_device
*dev
)
526 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
527 dev
->priv_flags
|= IFF_UNICAST_FLT
;
528 dev
->netdev_ops
= &ipvlan_netdev_ops
;
529 dev
->destructor
= free_netdev
;
530 dev
->header_ops
= &ipvlan_header_ops
;
531 dev
->ethtool_ops
= &ipvlan_ethtool_ops
;
532 dev
->tx_queue_len
= 0;
535 static const struct nla_policy ipvlan_nl_policy
[IFLA_IPVLAN_MAX
+ 1] =
537 [IFLA_IPVLAN_MODE
] = { .type
= NLA_U16
},
540 static struct rtnl_link_ops ipvlan_link_ops
= {
542 .priv_size
= sizeof(struct ipvl_dev
),
544 .get_size
= ipvlan_nl_getsize
,
545 .policy
= ipvlan_nl_policy
,
546 .validate
= ipvlan_nl_validate
,
547 .fill_info
= ipvlan_nl_fillinfo
,
548 .changelink
= ipvlan_nl_changelink
,
549 .maxtype
= IFLA_IPVLAN_MAX
,
551 .setup
= ipvlan_link_setup
,
552 .newlink
= ipvlan_link_new
,
553 .dellink
= ipvlan_link_delete
,
556 static int ipvlan_link_register(struct rtnl_link_ops
*ops
)
558 return rtnl_link_register(ops
);
561 static int ipvlan_device_event(struct notifier_block
*unused
,
562 unsigned long event
, void *ptr
)
564 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
565 struct ipvl_dev
*ipvlan
, *next
;
566 struct ipvl_port
*port
;
569 if (!netif_is_ipvlan_port(dev
))
572 port
= ipvlan_port_get_rtnl(dev
);
576 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
)
577 netif_stacked_transfer_operstate(ipvlan
->phy_dev
,
581 case NETDEV_UNREGISTER
:
582 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
585 list_for_each_entry_safe(ipvlan
, next
, &port
->ipvlans
,
587 ipvlan
->dev
->rtnl_link_ops
->dellink(ipvlan
->dev
,
589 unregister_netdevice_many(&lst_kill
);
592 case NETDEV_FEAT_CHANGE
:
593 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
) {
594 ipvlan
->dev
->features
= dev
->features
& IPVLAN_FEATURES
;
595 ipvlan
->dev
->gso_max_size
= dev
->gso_max_size
;
596 netdev_features_change(ipvlan
->dev
);
600 case NETDEV_CHANGEMTU
:
601 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
)
602 ipvlan_adjust_mtu(ipvlan
, dev
);
605 case NETDEV_PRE_TYPE_CHANGE
:
606 /* Forbid underlying device to change its type. */
612 static int ipvlan_add_addr6(struct ipvl_dev
*ipvlan
, struct in6_addr
*ip6_addr
)
614 struct ipvl_addr
*addr
;
616 if (ipvlan_addr_busy(ipvlan
->port
, ip6_addr
, true)) {
617 netif_err(ipvlan
, ifup
, ipvlan
->dev
,
618 "Failed to add IPv6=%pI6c addr for %s intf\n",
619 ip6_addr
, ipvlan
->dev
->name
);
622 addr
= kzalloc(sizeof(struct ipvl_addr
), GFP_ATOMIC
);
626 addr
->master
= ipvlan
;
627 memcpy(&addr
->ip6addr
, ip6_addr
, sizeof(struct in6_addr
));
628 addr
->atype
= IPVL_IPV6
;
629 list_add_tail(&addr
->anode
, &ipvlan
->addrs
);
631 /* If the interface is not up, the address will be added to the hash
632 * list by ipvlan_open.
634 if (netif_running(ipvlan
->dev
))
635 ipvlan_ht_addr_add(ipvlan
, addr
);
640 static void ipvlan_del_addr6(struct ipvl_dev
*ipvlan
, struct in6_addr
*ip6_addr
)
642 struct ipvl_addr
*addr
;
644 addr
= ipvlan_find_addr(ipvlan
, ip6_addr
, true);
648 ipvlan_ht_addr_del(addr
, true);
649 list_del(&addr
->anode
);
651 WARN_ON(ipvlan
->ipv6cnt
< 0);
652 kfree_rcu(addr
, rcu
);
657 static int ipvlan_addr6_event(struct notifier_block
*unused
,
658 unsigned long event
, void *ptr
)
660 struct inet6_ifaddr
*if6
= (struct inet6_ifaddr
*)ptr
;
661 struct net_device
*dev
= (struct net_device
*)if6
->idev
->dev
;
662 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
664 if (!netif_is_ipvlan(dev
))
667 if (!ipvlan
|| !ipvlan
->port
)
672 if (ipvlan_add_addr6(ipvlan
, &if6
->addr
))
677 ipvlan_del_addr6(ipvlan
, &if6
->addr
);
684 static int ipvlan_add_addr4(struct ipvl_dev
*ipvlan
, struct in_addr
*ip4_addr
)
686 struct ipvl_addr
*addr
;
688 if (ipvlan_addr_busy(ipvlan
->port
, ip4_addr
, false)) {
689 netif_err(ipvlan
, ifup
, ipvlan
->dev
,
690 "Failed to add IPv4=%pI4 on %s intf.\n",
691 ip4_addr
, ipvlan
->dev
->name
);
694 addr
= kzalloc(sizeof(struct ipvl_addr
), GFP_KERNEL
);
698 addr
->master
= ipvlan
;
699 memcpy(&addr
->ip4addr
, ip4_addr
, sizeof(struct in_addr
));
700 addr
->atype
= IPVL_IPV4
;
701 list_add_tail(&addr
->anode
, &ipvlan
->addrs
);
703 /* If the interface is not up, the address will be added to the hash
704 * list by ipvlan_open.
706 if (netif_running(ipvlan
->dev
))
707 ipvlan_ht_addr_add(ipvlan
, addr
);
712 static void ipvlan_del_addr4(struct ipvl_dev
*ipvlan
, struct in_addr
*ip4_addr
)
714 struct ipvl_addr
*addr
;
716 addr
= ipvlan_find_addr(ipvlan
, ip4_addr
, false);
720 ipvlan_ht_addr_del(addr
, true);
721 list_del(&addr
->anode
);
723 WARN_ON(ipvlan
->ipv4cnt
< 0);
724 kfree_rcu(addr
, rcu
);
729 static int ipvlan_addr4_event(struct notifier_block
*unused
,
730 unsigned long event
, void *ptr
)
732 struct in_ifaddr
*if4
= (struct in_ifaddr
*)ptr
;
733 struct net_device
*dev
= (struct net_device
*)if4
->ifa_dev
->dev
;
734 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
735 struct in_addr ip4_addr
;
737 if (!netif_is_ipvlan(dev
))
740 if (!ipvlan
|| !ipvlan
->port
)
745 ip4_addr
.s_addr
= if4
->ifa_address
;
746 if (ipvlan_add_addr4(ipvlan
, &ip4_addr
))
751 ip4_addr
.s_addr
= if4
->ifa_address
;
752 ipvlan_del_addr4(ipvlan
, &ip4_addr
);
759 static struct notifier_block ipvlan_addr4_notifier_block __read_mostly
= {
760 .notifier_call
= ipvlan_addr4_event
,
763 static struct notifier_block ipvlan_notifier_block __read_mostly
= {
764 .notifier_call
= ipvlan_device_event
,
767 static struct notifier_block ipvlan_addr6_notifier_block __read_mostly
= {
768 .notifier_call
= ipvlan_addr6_event
,
771 static int __init
ipvlan_init_module(void)
775 ipvlan_init_secret();
776 register_netdevice_notifier(&ipvlan_notifier_block
);
777 register_inet6addr_notifier(&ipvlan_addr6_notifier_block
);
778 register_inetaddr_notifier(&ipvlan_addr4_notifier_block
);
780 err
= ipvlan_link_register(&ipvlan_link_ops
);
786 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block
);
787 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block
);
788 unregister_netdevice_notifier(&ipvlan_notifier_block
);
792 static void __exit
ipvlan_cleanup_module(void)
794 rtnl_link_unregister(&ipvlan_link_ops
);
795 unregister_netdevice_notifier(&ipvlan_notifier_block
);
796 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block
);
797 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block
);
800 module_init(ipvlan_init_module
);
801 module_exit(ipvlan_cleanup_module
);
803 MODULE_LICENSE("GPL");
804 MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
805 MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
806 MODULE_ALIAS_RTNL_LINK("ipvlan");