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 u32 ipvl_nf_hook_refcnt = 0;
14 static struct nf_hook_ops ipvl_nfops[] __read_mostly = {
16 .hook = ipvlan_nf_input,
18 .hooknum = NF_INET_LOCAL_IN,
22 .hook = ipvlan_nf_input,
24 .hooknum = NF_INET_LOCAL_IN,
29 static const struct l3mdev_ops ipvl_l3mdev_ops = {
30 .l3mdev_l3_rcv = ipvlan_l3_rcv,
33 static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
35 ipvlan->dev->mtu = dev->mtu;
38 static int ipvlan_register_nf_hook(void)
42 if (!ipvl_nf_hook_refcnt) {
43 err = _nf_register_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops));
45 ipvl_nf_hook_refcnt = 1;
47 ipvl_nf_hook_refcnt++;
53 static void ipvlan_unregister_nf_hook(void)
55 WARN_ON(!ipvl_nf_hook_refcnt);
57 ipvl_nf_hook_refcnt--;
58 if (!ipvl_nf_hook_refcnt)
59 _nf_unregister_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops));
62 static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval)
64 struct ipvl_dev *ipvlan;
65 struct net_device *mdev = port->dev;
69 if (port->mode != nval) {
70 if (nval == IPVLAN_MODE_L3S) {
72 err = ipvlan_register_nf_hook();
74 mdev->l3mdev_ops = &ipvl_l3mdev_ops;
75 mdev->priv_flags |= IFF_L3MDEV_MASTER;
78 } else if (port->mode == IPVLAN_MODE_L3S) {
79 /* Old mode was L3S */
80 mdev->priv_flags &= ~IFF_L3MDEV_MASTER;
81 ipvlan_unregister_nf_hook();
82 mdev->l3mdev_ops = NULL;
84 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
85 if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S)
86 ipvlan->dev->flags |= IFF_NOARP;
88 ipvlan->dev->flags &= ~IFF_NOARP;
95 static int ipvlan_port_create(struct net_device *dev)
97 struct ipvl_port *port;
100 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) {
101 netdev_err(dev, "Master is either lo or non-ether device\n");
105 if (netif_is_macvlan_port(dev)) {
106 netdev_err(dev, "Master is a macvlan port.\n");
110 port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL);
115 port->mode = IPVLAN_MODE_L3;
116 INIT_LIST_HEAD(&port->ipvlans);
117 for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++)
118 INIT_HLIST_HEAD(&port->hlhead[idx]);
120 skb_queue_head_init(&port->backlog);
121 INIT_WORK(&port->wq, ipvlan_process_multicast);
123 err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
127 dev->priv_flags |= IFF_IPVLAN_MASTER;
135 static void ipvlan_port_destroy(struct net_device *dev)
137 struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
139 dev->priv_flags &= ~IFF_IPVLAN_MASTER;
140 if (port->mode == IPVLAN_MODE_L3S) {
141 dev->priv_flags &= ~IFF_L3MDEV_MASTER;
142 ipvlan_unregister_nf_hook();
143 dev->l3mdev_ops = NULL;
145 netdev_rx_handler_unregister(dev);
146 cancel_work_sync(&port->wq);
147 __skb_queue_purge(&port->backlog);
151 #define IPVLAN_FEATURES \
152 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
153 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
154 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
155 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
157 #define IPVLAN_STATE_MASK \
158 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
160 static int ipvlan_init(struct net_device *dev)
162 struct ipvl_dev *ipvlan = netdev_priv(dev);
163 const struct net_device *phy_dev = ipvlan->phy_dev;
164 struct ipvl_port *port = ipvlan->port;
166 dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
167 (phy_dev->state & IPVLAN_STATE_MASK);
168 dev->features = phy_dev->features & IPVLAN_FEATURES;
169 dev->features |= NETIF_F_LLTX;
170 dev->gso_max_size = phy_dev->gso_max_size;
171 dev->gso_max_segs = phy_dev->gso_max_segs;
172 dev->hard_header_len = phy_dev->hard_header_len;
174 netdev_lockdep_set_classes(dev);
176 ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats);
177 if (!ipvlan->pcpu_stats)
185 static void ipvlan_uninit(struct net_device *dev)
187 struct ipvl_dev *ipvlan = netdev_priv(dev);
188 struct ipvl_port *port = ipvlan->port;
190 free_percpu(ipvlan->pcpu_stats);
194 ipvlan_port_destroy(port->dev);
197 static int ipvlan_open(struct net_device *dev)
199 struct ipvl_dev *ipvlan = netdev_priv(dev);
200 struct net_device *phy_dev = ipvlan->phy_dev;
201 struct ipvl_addr *addr;
203 if (ipvlan->port->mode == IPVLAN_MODE_L3 ||
204 ipvlan->port->mode == IPVLAN_MODE_L3S)
205 dev->flags |= IFF_NOARP;
207 dev->flags &= ~IFF_NOARP;
209 list_for_each_entry(addr, &ipvlan->addrs, anode)
210 ipvlan_ht_addr_add(ipvlan, addr);
212 return dev_uc_add(phy_dev, phy_dev->dev_addr);
215 static int ipvlan_stop(struct net_device *dev)
217 struct ipvl_dev *ipvlan = netdev_priv(dev);
218 struct net_device *phy_dev = ipvlan->phy_dev;
219 struct ipvl_addr *addr;
221 dev_uc_unsync(phy_dev, dev);
222 dev_mc_unsync(phy_dev, dev);
224 dev_uc_del(phy_dev, phy_dev->dev_addr);
226 list_for_each_entry(addr, &ipvlan->addrs, anode)
227 ipvlan_ht_addr_del(addr);
232 static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
233 struct net_device *dev)
235 const struct ipvl_dev *ipvlan = netdev_priv(dev);
236 int skblen = skb->len;
239 ret = ipvlan_queue_xmit(skb, dev);
240 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
241 struct ipvl_pcpu_stats *pcptr;
243 pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
245 u64_stats_update_begin(&pcptr->syncp);
247 pcptr->tx_bytes += skblen;
248 u64_stats_update_end(&pcptr->syncp);
250 this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
255 static netdev_features_t ipvlan_fix_features(struct net_device *dev,
256 netdev_features_t features)
258 struct ipvl_dev *ipvlan = netdev_priv(dev);
260 return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
263 static void ipvlan_change_rx_flags(struct net_device *dev, int change)
265 struct ipvl_dev *ipvlan = netdev_priv(dev);
266 struct net_device *phy_dev = ipvlan->phy_dev;
268 if (change & IFF_ALLMULTI)
269 dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
272 static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
274 struct ipvl_dev *ipvlan = netdev_priv(dev);
276 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
277 bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
279 struct netdev_hw_addr *ha;
280 DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
282 bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
283 netdev_for_each_mc_addr(ha, dev)
284 __set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
286 /* Turn-on broadcast bit irrespective of address family,
287 * since broadcast is deferred to a work-queue, hence no
288 * impact on fast-path processing.
290 __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters);
292 bitmap_copy(ipvlan->mac_filters, mc_filters,
293 IPVLAN_MAC_FILTER_SIZE);
295 dev_uc_sync(ipvlan->phy_dev, dev);
296 dev_mc_sync(ipvlan->phy_dev, dev);
299 static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev,
300 struct rtnl_link_stats64 *s)
302 struct ipvl_dev *ipvlan = netdev_priv(dev);
304 if (ipvlan->pcpu_stats) {
305 struct ipvl_pcpu_stats *pcptr;
306 u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
307 u32 rx_errs = 0, tx_drps = 0;
311 for_each_possible_cpu(idx) {
312 pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
314 strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
315 rx_pkts = pcptr->rx_pkts;
316 rx_bytes = pcptr->rx_bytes;
317 rx_mcast = pcptr->rx_mcast;
318 tx_pkts = pcptr->tx_pkts;
319 tx_bytes = pcptr->tx_bytes;
320 } while (u64_stats_fetch_retry_irq(&pcptr->syncp,
323 s->rx_packets += rx_pkts;
324 s->rx_bytes += rx_bytes;
325 s->multicast += rx_mcast;
326 s->tx_packets += tx_pkts;
327 s->tx_bytes += tx_bytes;
329 /* u32 values are updated without syncp protection. */
330 rx_errs += pcptr->rx_errs;
331 tx_drps += pcptr->tx_drps;
333 s->rx_errors = rx_errs;
334 s->rx_dropped = rx_errs;
335 s->tx_dropped = tx_drps;
340 static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
342 struct ipvl_dev *ipvlan = netdev_priv(dev);
343 struct net_device *phy_dev = ipvlan->phy_dev;
345 return vlan_vid_add(phy_dev, proto, vid);
348 static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
351 struct ipvl_dev *ipvlan = netdev_priv(dev);
352 struct net_device *phy_dev = ipvlan->phy_dev;
354 vlan_vid_del(phy_dev, proto, vid);
358 static int ipvlan_get_iflink(const struct net_device *dev)
360 struct ipvl_dev *ipvlan = netdev_priv(dev);
362 return ipvlan->phy_dev->ifindex;
365 static const struct net_device_ops ipvlan_netdev_ops = {
366 .ndo_init = ipvlan_init,
367 .ndo_uninit = ipvlan_uninit,
368 .ndo_open = ipvlan_open,
369 .ndo_stop = ipvlan_stop,
370 .ndo_start_xmit = ipvlan_start_xmit,
371 .ndo_fix_features = ipvlan_fix_features,
372 .ndo_change_rx_flags = ipvlan_change_rx_flags,
373 .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
374 .ndo_get_stats64 = ipvlan_get_stats64,
375 .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
376 .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
377 .ndo_get_iflink = ipvlan_get_iflink,
380 static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
381 unsigned short type, const void *daddr,
382 const void *saddr, unsigned len)
384 const struct ipvl_dev *ipvlan = netdev_priv(dev);
385 struct net_device *phy_dev = ipvlan->phy_dev;
387 /* TODO Probably use a different field than dev_addr so that the
388 * mac-address on the virtual device is portable and can be carried
389 * while the packets use the mac-addr on the physical device.
391 return dev_hard_header(skb, phy_dev, type, daddr,
392 saddr ? : dev->dev_addr, len);
395 static const struct header_ops ipvlan_header_ops = {
396 .create = ipvlan_hard_header,
397 .parse = eth_header_parse,
398 .cache = eth_header_cache,
399 .cache_update = eth_header_cache_update,
402 static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev,
403 struct ethtool_link_ksettings *cmd)
405 const struct ipvl_dev *ipvlan = netdev_priv(dev);
407 return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd);
410 static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
411 struct ethtool_drvinfo *drvinfo)
413 strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
414 strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
417 static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
419 const struct ipvl_dev *ipvlan = netdev_priv(dev);
421 return ipvlan->msg_enable;
424 static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
426 struct ipvl_dev *ipvlan = netdev_priv(dev);
428 ipvlan->msg_enable = value;
431 static const struct ethtool_ops ipvlan_ethtool_ops = {
432 .get_link = ethtool_op_get_link,
433 .get_link_ksettings = ipvlan_ethtool_get_link_ksettings,
434 .get_drvinfo = ipvlan_ethtool_get_drvinfo,
435 .get_msglevel = ipvlan_ethtool_get_msglevel,
436 .set_msglevel = ipvlan_ethtool_set_msglevel,
439 static int ipvlan_nl_changelink(struct net_device *dev,
440 struct nlattr *tb[], struct nlattr *data[])
442 struct ipvl_dev *ipvlan = netdev_priv(dev);
443 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
446 if (data && data[IFLA_IPVLAN_MODE]) {
447 u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
449 err = ipvlan_set_port_mode(port, nmode);
454 static size_t ipvlan_nl_getsize(const struct net_device *dev)
457 + nla_total_size(2) /* IFLA_IPVLAN_MODE */
461 static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[])
463 if (data && data[IFLA_IPVLAN_MODE]) {
464 u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
466 if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX)
472 static int ipvlan_nl_fillinfo(struct sk_buff *skb,
473 const struct net_device *dev)
475 struct ipvl_dev *ipvlan = netdev_priv(dev);
476 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
483 if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
492 static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
493 struct nlattr *tb[], struct nlattr *data[])
495 struct ipvl_dev *ipvlan = netdev_priv(dev);
496 struct ipvl_port *port;
497 struct net_device *phy_dev;
499 u16 mode = IPVLAN_MODE_L3;
505 phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
509 if (netif_is_ipvlan(phy_dev)) {
510 struct ipvl_dev *tmp = netdev_priv(phy_dev);
512 phy_dev = tmp->phy_dev;
513 } else if (!netif_is_ipvlan_port(phy_dev)) {
514 err = ipvlan_port_create(phy_dev);
520 if (data && data[IFLA_IPVLAN_MODE])
521 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
523 port = ipvlan_port_get_rtnl(phy_dev);
524 ipvlan->phy_dev = phy_dev;
527 ipvlan->sfeatures = IPVLAN_FEATURES;
528 ipvlan_adjust_mtu(ipvlan, phy_dev);
529 INIT_LIST_HEAD(&ipvlan->addrs);
531 /* TODO Probably put random address here to be presented to the
532 * world but keep using the physical-dev address for the outgoing
535 memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
537 dev->priv_flags |= IFF_IPVLAN_SLAVE;
539 err = register_netdevice(dev);
541 goto destroy_ipvlan_port;
543 err = netdev_upper_dev_link(phy_dev, dev);
545 goto unregister_netdev;
547 err = ipvlan_set_port_mode(port, mode);
552 list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
553 netif_stacked_transfer_operstate(phy_dev, dev);
557 netdev_upper_dev_unlink(phy_dev, dev);
559 unregister_netdevice(dev);
562 ipvlan_port_destroy(phy_dev);
566 static void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
568 struct ipvl_dev *ipvlan = netdev_priv(dev);
569 struct ipvl_addr *addr, *next;
571 list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
572 ipvlan_ht_addr_del(addr);
573 list_del(&addr->anode);
574 kfree_rcu(addr, rcu);
577 list_del_rcu(&ipvlan->pnode);
578 unregister_netdevice_queue(dev, head);
579 netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
582 static void ipvlan_link_setup(struct net_device *dev)
586 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
587 dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE;
588 dev->netdev_ops = &ipvlan_netdev_ops;
589 dev->destructor = free_netdev;
590 dev->header_ops = &ipvlan_header_ops;
591 dev->ethtool_ops = &ipvlan_ethtool_ops;
594 static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
596 [IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
599 static struct rtnl_link_ops ipvlan_link_ops = {
601 .priv_size = sizeof(struct ipvl_dev),
603 .get_size = ipvlan_nl_getsize,
604 .policy = ipvlan_nl_policy,
605 .validate = ipvlan_nl_validate,
606 .fill_info = ipvlan_nl_fillinfo,
607 .changelink = ipvlan_nl_changelink,
608 .maxtype = IFLA_IPVLAN_MAX,
610 .setup = ipvlan_link_setup,
611 .newlink = ipvlan_link_new,
612 .dellink = ipvlan_link_delete,
615 static int ipvlan_link_register(struct rtnl_link_ops *ops)
617 return rtnl_link_register(ops);
620 static int ipvlan_device_event(struct notifier_block *unused,
621 unsigned long event, void *ptr)
623 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
624 struct ipvl_dev *ipvlan, *next;
625 struct ipvl_port *port;
628 if (!netif_is_ipvlan_port(dev))
631 port = ipvlan_port_get_rtnl(dev);
635 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
636 netif_stacked_transfer_operstate(ipvlan->phy_dev,
640 case NETDEV_UNREGISTER:
641 if (dev->reg_state != NETREG_UNREGISTERING)
644 list_for_each_entry_safe(ipvlan, next, &port->ipvlans,
646 ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
648 unregister_netdevice_many(&lst_kill);
651 case NETDEV_FEAT_CHANGE:
652 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
653 ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
654 ipvlan->dev->gso_max_size = dev->gso_max_size;
655 ipvlan->dev->gso_max_segs = dev->gso_max_segs;
656 netdev_features_change(ipvlan->dev);
660 case NETDEV_CHANGEMTU:
661 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
662 ipvlan_adjust_mtu(ipvlan, dev);
665 case NETDEV_PRE_TYPE_CHANGE:
666 /* Forbid underlying device to change its type. */
672 static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
674 struct ipvl_addr *addr;
676 if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
677 netif_err(ipvlan, ifup, ipvlan->dev,
678 "Failed to add IPv6=%pI6c addr for %s intf\n",
679 ip6_addr, ipvlan->dev->name);
682 addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
686 addr->master = ipvlan;
687 memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr));
688 addr->atype = IPVL_IPV6;
689 list_add_tail(&addr->anode, &ipvlan->addrs);
691 /* If the interface is not up, the address will be added to the hash
692 * list by ipvlan_open.
694 if (netif_running(ipvlan->dev))
695 ipvlan_ht_addr_add(ipvlan, addr);
700 static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
702 struct ipvl_addr *addr;
704 addr = ipvlan_find_addr(ipvlan, ip6_addr, true);
708 ipvlan_ht_addr_del(addr);
709 list_del(&addr->anode);
710 kfree_rcu(addr, rcu);
715 static int ipvlan_addr6_event(struct notifier_block *unused,
716 unsigned long event, void *ptr)
718 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
719 struct net_device *dev = (struct net_device *)if6->idev->dev;
720 struct ipvl_dev *ipvlan = netdev_priv(dev);
722 /* FIXME IPv6 autoconf calls us from bh without RTNL */
726 if (!netif_is_ipvlan(dev))
729 if (!ipvlan || !ipvlan->port)
734 if (ipvlan_add_addr6(ipvlan, &if6->addr))
739 ipvlan_del_addr6(ipvlan, &if6->addr);
746 static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
748 struct ipvl_addr *addr;
750 if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) {
751 netif_err(ipvlan, ifup, ipvlan->dev,
752 "Failed to add IPv4=%pI4 on %s intf.\n",
753 ip4_addr, ipvlan->dev->name);
756 addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL);
760 addr->master = ipvlan;
761 memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr));
762 addr->atype = IPVL_IPV4;
763 list_add_tail(&addr->anode, &ipvlan->addrs);
765 /* If the interface is not up, the address will be added to the hash
766 * list by ipvlan_open.
768 if (netif_running(ipvlan->dev))
769 ipvlan_ht_addr_add(ipvlan, addr);
774 static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
776 struct ipvl_addr *addr;
778 addr = ipvlan_find_addr(ipvlan, ip4_addr, false);
782 ipvlan_ht_addr_del(addr);
783 list_del(&addr->anode);
784 kfree_rcu(addr, rcu);
789 static int ipvlan_addr4_event(struct notifier_block *unused,
790 unsigned long event, void *ptr)
792 struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
793 struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
794 struct ipvl_dev *ipvlan = netdev_priv(dev);
795 struct in_addr ip4_addr;
797 if (!netif_is_ipvlan(dev))
800 if (!ipvlan || !ipvlan->port)
805 ip4_addr.s_addr = if4->ifa_address;
806 if (ipvlan_add_addr4(ipvlan, &ip4_addr))
811 ip4_addr.s_addr = if4->ifa_address;
812 ipvlan_del_addr4(ipvlan, &ip4_addr);
819 static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
820 .notifier_call = ipvlan_addr4_event,
823 static struct notifier_block ipvlan_notifier_block __read_mostly = {
824 .notifier_call = ipvlan_device_event,
827 static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
828 .notifier_call = ipvlan_addr6_event,
831 static int __init ipvlan_init_module(void)
835 ipvlan_init_secret();
836 register_netdevice_notifier(&ipvlan_notifier_block);
837 register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
838 register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
840 err = ipvlan_link_register(&ipvlan_link_ops);
846 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
847 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
848 unregister_netdevice_notifier(&ipvlan_notifier_block);
852 static void __exit ipvlan_cleanup_module(void)
854 rtnl_link_unregister(&ipvlan_link_ops);
855 unregister_netdevice_notifier(&ipvlan_notifier_block);
856 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
857 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
860 module_init(ipvlan_init_module);
861 module_exit(ipvlan_cleanup_module);
863 MODULE_LICENSE("GPL");
864 MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
865 MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
866 MODULE_ALIAS_RTNL_LINK("ipvlan");