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 static unsigned int ipvlan_netid __read_mostly
;
15 unsigned int ipvl_nf_hook_refcnt
;
18 static struct nf_hook_ops ipvl_nfops
[] __read_mostly
= {
20 .hook
= ipvlan_nf_input
,
22 .hooknum
= NF_INET_LOCAL_IN
,
26 .hook
= ipvlan_nf_input
,
28 .hooknum
= NF_INET_LOCAL_IN
,
33 static const struct l3mdev_ops ipvl_l3mdev_ops
= {
34 .l3mdev_l3_rcv
= ipvlan_l3_rcv
,
37 static void ipvlan_adjust_mtu(struct ipvl_dev
*ipvlan
, struct net_device
*dev
)
39 ipvlan
->dev
->mtu
= dev
->mtu
;
42 static int ipvlan_register_nf_hook(struct net
*net
)
44 struct ipvlan_netns
*vnet
= net_generic(net
, ipvlan_netid
);
47 if (!vnet
->ipvl_nf_hook_refcnt
) {
48 err
= nf_register_net_hooks(net
, ipvl_nfops
,
49 ARRAY_SIZE(ipvl_nfops
));
51 vnet
->ipvl_nf_hook_refcnt
= 1;
53 vnet
->ipvl_nf_hook_refcnt
++;
59 static void ipvlan_unregister_nf_hook(struct net
*net
)
61 struct ipvlan_netns
*vnet
= net_generic(net
, ipvlan_netid
);
63 if (WARN_ON(!vnet
->ipvl_nf_hook_refcnt
))
66 vnet
->ipvl_nf_hook_refcnt
--;
67 if (!vnet
->ipvl_nf_hook_refcnt
)
68 nf_unregister_net_hooks(net
, ipvl_nfops
,
69 ARRAY_SIZE(ipvl_nfops
));
72 static int ipvlan_set_port_mode(struct ipvl_port
*port
, u16 nval
)
74 struct ipvl_dev
*ipvlan
;
75 struct net_device
*mdev
= port
->dev
;
79 if (port
->mode
!= nval
) {
80 if (nval
== IPVLAN_MODE_L3S
) {
82 err
= ipvlan_register_nf_hook(read_pnet(&port
->pnet
));
84 mdev
->l3mdev_ops
= &ipvl_l3mdev_ops
;
85 mdev
->priv_flags
|= IFF_L3MDEV_MASTER
;
88 } else if (port
->mode
== IPVLAN_MODE_L3S
) {
89 /* Old mode was L3S */
90 mdev
->priv_flags
&= ~IFF_L3MDEV_MASTER
;
91 ipvlan_unregister_nf_hook(read_pnet(&port
->pnet
));
92 mdev
->l3mdev_ops
= NULL
;
94 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
) {
95 if (nval
== IPVLAN_MODE_L3
|| nval
== IPVLAN_MODE_L3S
)
96 ipvlan
->dev
->flags
|= IFF_NOARP
;
98 ipvlan
->dev
->flags
&= ~IFF_NOARP
;
105 static int ipvlan_port_create(struct net_device
*dev
)
107 struct ipvl_port
*port
;
110 if (dev
->type
!= ARPHRD_ETHER
|| dev
->flags
& IFF_LOOPBACK
) {
111 netdev_err(dev
, "Master is either lo or non-ether device\n");
115 if (netdev_is_rx_handler_busy(dev
)) {
116 netdev_err(dev
, "Device is already in use.\n");
120 port
= kzalloc(sizeof(struct ipvl_port
), GFP_KERNEL
);
124 write_pnet(&port
->pnet
, dev_net(dev
));
126 port
->mode
= IPVLAN_MODE_L3
;
127 INIT_LIST_HEAD(&port
->ipvlans
);
128 for (idx
= 0; idx
< IPVLAN_HASH_SIZE
; idx
++)
129 INIT_HLIST_HEAD(&port
->hlhead
[idx
]);
131 skb_queue_head_init(&port
->backlog
);
132 INIT_WORK(&port
->wq
, ipvlan_process_multicast
);
133 ida_init(&port
->ida
);
134 port
->dev_id_start
= 1;
136 err
= netdev_rx_handler_register(dev
, ipvlan_handle_frame
, port
);
140 dev
->priv_flags
|= IFF_IPVLAN_MASTER
;
148 static void ipvlan_port_destroy(struct net_device
*dev
)
150 struct ipvl_port
*port
= ipvlan_port_get_rtnl(dev
);
153 dev
->priv_flags
&= ~IFF_IPVLAN_MASTER
;
154 if (port
->mode
== IPVLAN_MODE_L3S
) {
155 dev
->priv_flags
&= ~IFF_L3MDEV_MASTER
;
156 ipvlan_unregister_nf_hook(dev_net(dev
));
157 dev
->l3mdev_ops
= NULL
;
159 netdev_rx_handler_unregister(dev
);
160 cancel_work_sync(&port
->wq
);
161 while ((skb
= __skb_dequeue(&port
->backlog
)) != NULL
) {
166 ida_destroy(&port
->ida
);
170 #define IPVLAN_FEATURES \
171 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
172 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
173 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
174 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
176 #define IPVLAN_STATE_MASK \
177 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
179 static int ipvlan_init(struct net_device
*dev
)
181 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
182 const struct net_device
*phy_dev
= ipvlan
->phy_dev
;
183 struct ipvl_port
*port
= ipvlan
->port
;
185 dev
->state
= (dev
->state
& ~IPVLAN_STATE_MASK
) |
186 (phy_dev
->state
& IPVLAN_STATE_MASK
);
187 dev
->features
= phy_dev
->features
& IPVLAN_FEATURES
;
188 dev
->features
|= NETIF_F_LLTX
;
189 dev
->gso_max_size
= phy_dev
->gso_max_size
;
190 dev
->gso_max_segs
= phy_dev
->gso_max_segs
;
191 dev
->hard_header_len
= phy_dev
->hard_header_len
;
193 netdev_lockdep_set_classes(dev
);
195 ipvlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats
);
196 if (!ipvlan
->pcpu_stats
)
204 static void ipvlan_uninit(struct net_device
*dev
)
206 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
207 struct ipvl_port
*port
= ipvlan
->port
;
209 free_percpu(ipvlan
->pcpu_stats
);
213 ipvlan_port_destroy(port
->dev
);
216 static int ipvlan_open(struct net_device
*dev
)
218 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
219 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
220 struct ipvl_addr
*addr
;
222 if (ipvlan
->port
->mode
== IPVLAN_MODE_L3
||
223 ipvlan
->port
->mode
== IPVLAN_MODE_L3S
)
224 dev
->flags
|= IFF_NOARP
;
226 dev
->flags
&= ~IFF_NOARP
;
228 list_for_each_entry(addr
, &ipvlan
->addrs
, anode
)
229 ipvlan_ht_addr_add(ipvlan
, addr
);
231 return dev_uc_add(phy_dev
, phy_dev
->dev_addr
);
234 static int ipvlan_stop(struct net_device
*dev
)
236 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
237 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
238 struct ipvl_addr
*addr
;
240 dev_uc_unsync(phy_dev
, dev
);
241 dev_mc_unsync(phy_dev
, dev
);
243 dev_uc_del(phy_dev
, phy_dev
->dev_addr
);
245 list_for_each_entry(addr
, &ipvlan
->addrs
, anode
)
246 ipvlan_ht_addr_del(addr
);
251 static netdev_tx_t
ipvlan_start_xmit(struct sk_buff
*skb
,
252 struct net_device
*dev
)
254 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
255 int skblen
= skb
->len
;
258 ret
= ipvlan_queue_xmit(skb
, dev
);
259 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
260 struct ipvl_pcpu_stats
*pcptr
;
262 pcptr
= this_cpu_ptr(ipvlan
->pcpu_stats
);
264 u64_stats_update_begin(&pcptr
->syncp
);
266 pcptr
->tx_bytes
+= skblen
;
267 u64_stats_update_end(&pcptr
->syncp
);
269 this_cpu_inc(ipvlan
->pcpu_stats
->tx_drps
);
274 static netdev_features_t
ipvlan_fix_features(struct net_device
*dev
,
275 netdev_features_t features
)
277 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
279 return features
& (ipvlan
->sfeatures
| ~IPVLAN_FEATURES
);
282 static void ipvlan_change_rx_flags(struct net_device
*dev
, int change
)
284 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
285 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
287 if (change
& IFF_ALLMULTI
)
288 dev_set_allmulti(phy_dev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
291 static void ipvlan_set_multicast_mac_filter(struct net_device
*dev
)
293 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
295 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
296 bitmap_fill(ipvlan
->mac_filters
, IPVLAN_MAC_FILTER_SIZE
);
298 struct netdev_hw_addr
*ha
;
299 DECLARE_BITMAP(mc_filters
, IPVLAN_MAC_FILTER_SIZE
);
301 bitmap_zero(mc_filters
, IPVLAN_MAC_FILTER_SIZE
);
302 netdev_for_each_mc_addr(ha
, dev
)
303 __set_bit(ipvlan_mac_hash(ha
->addr
), mc_filters
);
305 /* Turn-on broadcast bit irrespective of address family,
306 * since broadcast is deferred to a work-queue, hence no
307 * impact on fast-path processing.
309 __set_bit(ipvlan_mac_hash(dev
->broadcast
), mc_filters
);
311 bitmap_copy(ipvlan
->mac_filters
, mc_filters
,
312 IPVLAN_MAC_FILTER_SIZE
);
314 dev_uc_sync(ipvlan
->phy_dev
, dev
);
315 dev_mc_sync(ipvlan
->phy_dev
, dev
);
318 static void ipvlan_get_stats64(struct net_device
*dev
,
319 struct rtnl_link_stats64
*s
)
321 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
323 if (ipvlan
->pcpu_stats
) {
324 struct ipvl_pcpu_stats
*pcptr
;
325 u64 rx_pkts
, rx_bytes
, rx_mcast
, tx_pkts
, tx_bytes
;
326 u32 rx_errs
= 0, tx_drps
= 0;
330 for_each_possible_cpu(idx
) {
331 pcptr
= per_cpu_ptr(ipvlan
->pcpu_stats
, idx
);
333 strt
= u64_stats_fetch_begin_irq(&pcptr
->syncp
);
334 rx_pkts
= pcptr
->rx_pkts
;
335 rx_bytes
= pcptr
->rx_bytes
;
336 rx_mcast
= pcptr
->rx_mcast
;
337 tx_pkts
= pcptr
->tx_pkts
;
338 tx_bytes
= pcptr
->tx_bytes
;
339 } while (u64_stats_fetch_retry_irq(&pcptr
->syncp
,
342 s
->rx_packets
+= rx_pkts
;
343 s
->rx_bytes
+= rx_bytes
;
344 s
->multicast
+= rx_mcast
;
345 s
->tx_packets
+= tx_pkts
;
346 s
->tx_bytes
+= tx_bytes
;
348 /* u32 values are updated without syncp protection. */
349 rx_errs
+= pcptr
->rx_errs
;
350 tx_drps
+= pcptr
->tx_drps
;
352 s
->rx_errors
= rx_errs
;
353 s
->rx_dropped
= rx_errs
;
354 s
->tx_dropped
= tx_drps
;
358 static int ipvlan_vlan_rx_add_vid(struct net_device
*dev
, __be16 proto
, u16 vid
)
360 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
361 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
363 return vlan_vid_add(phy_dev
, proto
, vid
);
366 static int ipvlan_vlan_rx_kill_vid(struct net_device
*dev
, __be16 proto
,
369 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
370 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
372 vlan_vid_del(phy_dev
, proto
, vid
);
376 static int ipvlan_get_iflink(const struct net_device
*dev
)
378 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
380 return ipvlan
->phy_dev
->ifindex
;
383 static const struct net_device_ops ipvlan_netdev_ops
= {
384 .ndo_init
= ipvlan_init
,
385 .ndo_uninit
= ipvlan_uninit
,
386 .ndo_open
= ipvlan_open
,
387 .ndo_stop
= ipvlan_stop
,
388 .ndo_start_xmit
= ipvlan_start_xmit
,
389 .ndo_fix_features
= ipvlan_fix_features
,
390 .ndo_change_rx_flags
= ipvlan_change_rx_flags
,
391 .ndo_set_rx_mode
= ipvlan_set_multicast_mac_filter
,
392 .ndo_get_stats64
= ipvlan_get_stats64
,
393 .ndo_vlan_rx_add_vid
= ipvlan_vlan_rx_add_vid
,
394 .ndo_vlan_rx_kill_vid
= ipvlan_vlan_rx_kill_vid
,
395 .ndo_get_iflink
= ipvlan_get_iflink
,
398 static int ipvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
399 unsigned short type
, const void *daddr
,
400 const void *saddr
, unsigned len
)
402 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
403 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
405 /* TODO Probably use a different field than dev_addr so that the
406 * mac-address on the virtual device is portable and can be carried
407 * while the packets use the mac-addr on the physical device.
409 return dev_hard_header(skb
, phy_dev
, type
, daddr
,
410 saddr
? : dev
->dev_addr
, len
);
413 static const struct header_ops ipvlan_header_ops
= {
414 .create
= ipvlan_hard_header
,
415 .parse
= eth_header_parse
,
416 .cache
= eth_header_cache
,
417 .cache_update
= eth_header_cache_update
,
420 static int ipvlan_ethtool_get_link_ksettings(struct net_device
*dev
,
421 struct ethtool_link_ksettings
*cmd
)
423 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
425 return __ethtool_get_link_ksettings(ipvlan
->phy_dev
, cmd
);
428 static void ipvlan_ethtool_get_drvinfo(struct net_device
*dev
,
429 struct ethtool_drvinfo
*drvinfo
)
431 strlcpy(drvinfo
->driver
, IPVLAN_DRV
, sizeof(drvinfo
->driver
));
432 strlcpy(drvinfo
->version
, IPV_DRV_VER
, sizeof(drvinfo
->version
));
435 static u32
ipvlan_ethtool_get_msglevel(struct net_device
*dev
)
437 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
439 return ipvlan
->msg_enable
;
442 static void ipvlan_ethtool_set_msglevel(struct net_device
*dev
, u32 value
)
444 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
446 ipvlan
->msg_enable
= value
;
449 static const struct ethtool_ops ipvlan_ethtool_ops
= {
450 .get_link
= ethtool_op_get_link
,
451 .get_link_ksettings
= ipvlan_ethtool_get_link_ksettings
,
452 .get_drvinfo
= ipvlan_ethtool_get_drvinfo
,
453 .get_msglevel
= ipvlan_ethtool_get_msglevel
,
454 .set_msglevel
= ipvlan_ethtool_set_msglevel
,
457 static int ipvlan_nl_changelink(struct net_device
*dev
,
458 struct nlattr
*tb
[], struct nlattr
*data
[],
459 struct netlink_ext_ack
*extack
)
461 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
462 struct ipvl_port
*port
= ipvlan_port_get_rtnl(ipvlan
->phy_dev
);
465 if (data
&& data
[IFLA_IPVLAN_MODE
]) {
466 u16 nmode
= nla_get_u16(data
[IFLA_IPVLAN_MODE
]);
468 err
= ipvlan_set_port_mode(port
, nmode
);
473 static size_t ipvlan_nl_getsize(const struct net_device
*dev
)
476 + nla_total_size(2) /* IFLA_IPVLAN_MODE */
480 static int ipvlan_nl_validate(struct nlattr
*tb
[], struct nlattr
*data
[],
481 struct netlink_ext_ack
*extack
)
483 if (data
&& data
[IFLA_IPVLAN_MODE
]) {
484 u16 mode
= nla_get_u16(data
[IFLA_IPVLAN_MODE
]);
486 if (mode
< IPVLAN_MODE_L2
|| mode
>= IPVLAN_MODE_MAX
)
492 static int ipvlan_nl_fillinfo(struct sk_buff
*skb
,
493 const struct net_device
*dev
)
495 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
496 struct ipvl_port
*port
= ipvlan_port_get_rtnl(ipvlan
->phy_dev
);
503 if (nla_put_u16(skb
, IFLA_IPVLAN_MODE
, port
->mode
))
512 int ipvlan_link_new(struct net
*src_net
, struct net_device
*dev
,
513 struct nlattr
*tb
[], struct nlattr
*data
[],
514 struct netlink_ext_ack
*extack
)
516 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
517 struct ipvl_port
*port
;
518 struct net_device
*phy_dev
;
520 u16 mode
= IPVLAN_MODE_L3
;
526 phy_dev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
530 if (netif_is_ipvlan(phy_dev
)) {
531 struct ipvl_dev
*tmp
= netdev_priv(phy_dev
);
533 phy_dev
= tmp
->phy_dev
;
534 } else if (!netif_is_ipvlan_port(phy_dev
)) {
535 err
= ipvlan_port_create(phy_dev
);
541 if (data
&& data
[IFLA_IPVLAN_MODE
])
542 mode
= nla_get_u16(data
[IFLA_IPVLAN_MODE
]);
544 port
= ipvlan_port_get_rtnl(phy_dev
);
545 ipvlan
->phy_dev
= phy_dev
;
548 ipvlan
->sfeatures
= IPVLAN_FEATURES
;
549 ipvlan_adjust_mtu(ipvlan
, phy_dev
);
550 INIT_LIST_HEAD(&ipvlan
->addrs
);
552 /* If the port-id base is at the MAX value, then wrap it around and
553 * begin from 0x1 again. This may be due to a busy system where lots
554 * of slaves are getting created and deleted.
556 if (port
->dev_id_start
== 0xFFFE)
557 port
->dev_id_start
= 0x1;
559 /* Since L2 address is shared among all IPvlan slaves including
560 * master, use unique 16 bit dev-ids to diffentiate among them.
561 * Assign IDs between 0x1 and 0xFFFE (used by the master) to each
562 * slave link [see addrconf_ifid_eui48()].
564 err
= ida_simple_get(&port
->ida
, port
->dev_id_start
, 0xFFFE,
567 err
= ida_simple_get(&port
->ida
, 0x1, port
->dev_id_start
,
570 goto destroy_ipvlan_port
;
572 /* Increment id-base to the next slot for the future assignment */
573 port
->dev_id_start
= err
+ 1;
575 /* TODO Probably put random address here to be presented to the
576 * world but keep using the physical-dev address for the outgoing
579 memcpy(dev
->dev_addr
, phy_dev
->dev_addr
, ETH_ALEN
);
581 dev
->priv_flags
|= IFF_IPVLAN_SLAVE
;
583 err
= register_netdevice(dev
);
587 err
= netdev_upper_dev_link(phy_dev
, dev
);
589 goto unregister_netdev
;
591 err
= ipvlan_set_port_mode(port
, mode
);
596 list_add_tail_rcu(&ipvlan
->pnode
, &port
->ipvlans
);
597 netif_stacked_transfer_operstate(phy_dev
, dev
);
601 netdev_upper_dev_unlink(phy_dev
, dev
);
603 unregister_netdevice(dev
);
605 ida_simple_remove(&port
->ida
, dev
->dev_id
);
608 ipvlan_port_destroy(phy_dev
);
611 EXPORT_SYMBOL_GPL(ipvlan_link_new
);
613 void ipvlan_link_delete(struct net_device
*dev
, struct list_head
*head
)
615 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
616 struct ipvl_addr
*addr
, *next
;
618 list_for_each_entry_safe(addr
, next
, &ipvlan
->addrs
, anode
) {
619 ipvlan_ht_addr_del(addr
);
620 list_del(&addr
->anode
);
621 kfree_rcu(addr
, rcu
);
624 ida_simple_remove(&ipvlan
->port
->ida
, dev
->dev_id
);
625 list_del_rcu(&ipvlan
->pnode
);
626 unregister_netdevice_queue(dev
, head
);
627 netdev_upper_dev_unlink(ipvlan
->phy_dev
, dev
);
629 EXPORT_SYMBOL_GPL(ipvlan_link_delete
);
631 void ipvlan_link_setup(struct net_device
*dev
)
635 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
636 dev
->priv_flags
|= IFF_UNICAST_FLT
| IFF_NO_QUEUE
;
637 dev
->netdev_ops
= &ipvlan_netdev_ops
;
638 dev
->needs_free_netdev
= true;
639 dev
->header_ops
= &ipvlan_header_ops
;
640 dev
->ethtool_ops
= &ipvlan_ethtool_ops
;
642 EXPORT_SYMBOL_GPL(ipvlan_link_setup
);
644 static const struct nla_policy ipvlan_nl_policy
[IFLA_IPVLAN_MAX
+ 1] =
646 [IFLA_IPVLAN_MODE
] = { .type
= NLA_U16
},
649 static struct rtnl_link_ops ipvlan_link_ops
= {
651 .priv_size
= sizeof(struct ipvl_dev
),
653 .setup
= ipvlan_link_setup
,
654 .newlink
= ipvlan_link_new
,
655 .dellink
= ipvlan_link_delete
,
658 int ipvlan_link_register(struct rtnl_link_ops
*ops
)
660 ops
->get_size
= ipvlan_nl_getsize
;
661 ops
->policy
= ipvlan_nl_policy
;
662 ops
->validate
= ipvlan_nl_validate
;
663 ops
->fill_info
= ipvlan_nl_fillinfo
;
664 ops
->changelink
= ipvlan_nl_changelink
;
665 ops
->maxtype
= IFLA_IPVLAN_MAX
;
666 return rtnl_link_register(ops
);
668 EXPORT_SYMBOL_GPL(ipvlan_link_register
);
670 static int ipvlan_device_event(struct notifier_block
*unused
,
671 unsigned long event
, void *ptr
)
673 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
674 struct ipvl_dev
*ipvlan
, *next
;
675 struct ipvl_port
*port
;
678 if (!netif_is_ipvlan_port(dev
))
681 port
= ipvlan_port_get_rtnl(dev
);
685 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
)
686 netif_stacked_transfer_operstate(ipvlan
->phy_dev
,
690 case NETDEV_REGISTER
: {
691 struct net
*oldnet
, *newnet
= dev_net(dev
);
692 struct ipvlan_netns
*old_vnet
;
694 oldnet
= read_pnet(&port
->pnet
);
695 if (net_eq(newnet
, oldnet
))
698 write_pnet(&port
->pnet
, newnet
);
700 old_vnet
= net_generic(oldnet
, ipvlan_netid
);
701 if (!old_vnet
->ipvl_nf_hook_refcnt
)
704 ipvlan_register_nf_hook(newnet
);
705 ipvlan_unregister_nf_hook(oldnet
);
708 case NETDEV_UNREGISTER
:
709 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
712 list_for_each_entry_safe(ipvlan
, next
, &port
->ipvlans
,
714 ipvlan
->dev
->rtnl_link_ops
->dellink(ipvlan
->dev
,
716 unregister_netdevice_many(&lst_kill
);
719 case NETDEV_FEAT_CHANGE
:
720 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
) {
721 ipvlan
->dev
->features
= dev
->features
& IPVLAN_FEATURES
;
722 ipvlan
->dev
->gso_max_size
= dev
->gso_max_size
;
723 ipvlan
->dev
->gso_max_segs
= dev
->gso_max_segs
;
724 netdev_features_change(ipvlan
->dev
);
728 case NETDEV_CHANGEMTU
:
729 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
)
730 ipvlan_adjust_mtu(ipvlan
, dev
);
733 case NETDEV_PRE_TYPE_CHANGE
:
734 /* Forbid underlying device to change its type. */
740 static int ipvlan_add_addr(struct ipvl_dev
*ipvlan
, void *iaddr
, bool is_v6
)
742 struct ipvl_addr
*addr
;
744 addr
= kzalloc(sizeof(struct ipvl_addr
), GFP_ATOMIC
);
748 addr
->master
= ipvlan
;
750 memcpy(&addr
->ip6addr
, iaddr
, sizeof(struct in6_addr
));
751 addr
->atype
= IPVL_IPV6
;
753 memcpy(&addr
->ip4addr
, iaddr
, sizeof(struct in_addr
));
754 addr
->atype
= IPVL_IPV4
;
756 list_add_tail(&addr
->anode
, &ipvlan
->addrs
);
758 /* If the interface is not up, the address will be added to the hash
759 * list by ipvlan_open.
761 if (netif_running(ipvlan
->dev
))
762 ipvlan_ht_addr_add(ipvlan
, addr
);
767 static void ipvlan_del_addr(struct ipvl_dev
*ipvlan
, void *iaddr
, bool is_v6
)
769 struct ipvl_addr
*addr
;
771 addr
= ipvlan_find_addr(ipvlan
, iaddr
, is_v6
);
775 ipvlan_ht_addr_del(addr
);
776 list_del(&addr
->anode
);
777 kfree_rcu(addr
, rcu
);
782 static int ipvlan_add_addr6(struct ipvl_dev
*ipvlan
, struct in6_addr
*ip6_addr
)
784 if (ipvlan_addr_busy(ipvlan
->port
, ip6_addr
, true)) {
785 netif_err(ipvlan
, ifup
, ipvlan
->dev
,
786 "Failed to add IPv6=%pI6c addr for %s intf\n",
787 ip6_addr
, ipvlan
->dev
->name
);
791 return ipvlan_add_addr(ipvlan
, ip6_addr
, true);
794 static void ipvlan_del_addr6(struct ipvl_dev
*ipvlan
, struct in6_addr
*ip6_addr
)
796 return ipvlan_del_addr(ipvlan
, ip6_addr
, true);
799 static int ipvlan_addr6_event(struct notifier_block
*unused
,
800 unsigned long event
, void *ptr
)
802 struct inet6_ifaddr
*if6
= (struct inet6_ifaddr
*)ptr
;
803 struct net_device
*dev
= (struct net_device
*)if6
->idev
->dev
;
804 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
806 /* FIXME IPv6 autoconf calls us from bh without RTNL */
810 if (!netif_is_ipvlan(dev
))
813 if (!ipvlan
|| !ipvlan
->port
)
818 if (ipvlan_add_addr6(ipvlan
, &if6
->addr
))
823 ipvlan_del_addr6(ipvlan
, &if6
->addr
);
830 static int ipvlan_addr6_validator_event(struct notifier_block
*unused
,
831 unsigned long event
, void *ptr
)
833 struct in6_validator_info
*i6vi
= (struct in6_validator_info
*)ptr
;
834 struct net_device
*dev
= (struct net_device
*)i6vi
->i6vi_dev
->dev
;
835 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
837 /* FIXME IPv6 autoconf calls us from bh without RTNL */
841 if (!netif_is_ipvlan(dev
))
844 if (!ipvlan
|| !ipvlan
->port
)
849 if (ipvlan_addr_busy(ipvlan
->port
, &i6vi
->i6vi_addr
, true))
850 return notifier_from_errno(-EADDRINUSE
);
857 static int ipvlan_add_addr4(struct ipvl_dev
*ipvlan
, struct in_addr
*ip4_addr
)
859 if (ipvlan_addr_busy(ipvlan
->port
, ip4_addr
, false)) {
860 netif_err(ipvlan
, ifup
, ipvlan
->dev
,
861 "Failed to add IPv4=%pI4 on %s intf.\n",
862 ip4_addr
, ipvlan
->dev
->name
);
866 return ipvlan_add_addr(ipvlan
, ip4_addr
, false);
869 static void ipvlan_del_addr4(struct ipvl_dev
*ipvlan
, struct in_addr
*ip4_addr
)
871 return ipvlan_del_addr(ipvlan
, ip4_addr
, false);
874 static int ipvlan_addr4_event(struct notifier_block
*unused
,
875 unsigned long event
, void *ptr
)
877 struct in_ifaddr
*if4
= (struct in_ifaddr
*)ptr
;
878 struct net_device
*dev
= (struct net_device
*)if4
->ifa_dev
->dev
;
879 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
880 struct in_addr ip4_addr
;
882 if (!netif_is_ipvlan(dev
))
885 if (!ipvlan
|| !ipvlan
->port
)
890 ip4_addr
.s_addr
= if4
->ifa_address
;
891 if (ipvlan_add_addr4(ipvlan
, &ip4_addr
))
896 ip4_addr
.s_addr
= if4
->ifa_address
;
897 ipvlan_del_addr4(ipvlan
, &ip4_addr
);
904 static int ipvlan_addr4_validator_event(struct notifier_block
*unused
,
905 unsigned long event
, void *ptr
)
907 struct in_validator_info
*ivi
= (struct in_validator_info
*)ptr
;
908 struct net_device
*dev
= (struct net_device
*)ivi
->ivi_dev
->dev
;
909 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
911 if (!netif_is_ipvlan(dev
))
914 if (!ipvlan
|| !ipvlan
->port
)
919 if (ipvlan_addr_busy(ipvlan
->port
, &ivi
->ivi_addr
, false))
920 return notifier_from_errno(-EADDRINUSE
);
927 static struct notifier_block ipvlan_addr4_notifier_block __read_mostly
= {
928 .notifier_call
= ipvlan_addr4_event
,
931 static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly
= {
932 .notifier_call
= ipvlan_addr4_validator_event
,
935 static struct notifier_block ipvlan_notifier_block __read_mostly
= {
936 .notifier_call
= ipvlan_device_event
,
939 static struct notifier_block ipvlan_addr6_notifier_block __read_mostly
= {
940 .notifier_call
= ipvlan_addr6_event
,
943 static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly
= {
944 .notifier_call
= ipvlan_addr6_validator_event
,
947 static void ipvlan_ns_exit(struct net
*net
)
949 struct ipvlan_netns
*vnet
= net_generic(net
, ipvlan_netid
);
951 if (WARN_ON_ONCE(vnet
->ipvl_nf_hook_refcnt
)) {
952 vnet
->ipvl_nf_hook_refcnt
= 0;
953 nf_unregister_net_hooks(net
, ipvl_nfops
,
954 ARRAY_SIZE(ipvl_nfops
));
958 static struct pernet_operations ipvlan_net_ops
= {
960 .size
= sizeof(struct ipvlan_netns
),
961 .exit
= ipvlan_ns_exit
,
964 static int __init
ipvlan_init_module(void)
968 ipvlan_init_secret();
969 register_netdevice_notifier(&ipvlan_notifier_block
);
970 register_inet6addr_notifier(&ipvlan_addr6_notifier_block
);
971 register_inet6addr_validator_notifier(
972 &ipvlan_addr6_vtor_notifier_block
);
973 register_inetaddr_notifier(&ipvlan_addr4_notifier_block
);
974 register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block
);
976 err
= register_pernet_subsys(&ipvlan_net_ops
);
980 err
= ipvlan_link_register(&ipvlan_link_ops
);
982 unregister_pernet_subsys(&ipvlan_net_ops
);
988 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block
);
989 unregister_inetaddr_validator_notifier(
990 &ipvlan_addr4_vtor_notifier_block
);
991 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block
);
992 unregister_inet6addr_validator_notifier(
993 &ipvlan_addr6_vtor_notifier_block
);
994 unregister_netdevice_notifier(&ipvlan_notifier_block
);
998 static void __exit
ipvlan_cleanup_module(void)
1000 rtnl_link_unregister(&ipvlan_link_ops
);
1001 unregister_pernet_subsys(&ipvlan_net_ops
);
1002 unregister_netdevice_notifier(&ipvlan_notifier_block
);
1003 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block
);
1004 unregister_inetaddr_validator_notifier(
1005 &ipvlan_addr4_vtor_notifier_block
);
1006 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block
);
1007 unregister_inet6addr_validator_notifier(
1008 &ipvlan_addr6_vtor_notifier_block
);
1011 module_init(ipvlan_init_module
);
1012 module_exit(ipvlan_cleanup_module
);
1014 MODULE_LICENSE("GPL");
1015 MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
1016 MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
1017 MODULE_ALIAS_RTNL_LINK("ipvlan");