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 (netdev_is_rx_handler_busy(dev)) {
106 netdev_err(dev, "Device is already in use.\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);
122 ida_init(&port->ida);
123 port->dev_id_start = 1;
125 err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
129 dev->priv_flags |= IFF_IPVLAN_MASTER;
137 static void ipvlan_port_destroy(struct net_device *dev)
139 struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
142 dev->priv_flags &= ~IFF_IPVLAN_MASTER;
143 if (port->mode == IPVLAN_MODE_L3S) {
144 dev->priv_flags &= ~IFF_L3MDEV_MASTER;
145 ipvlan_unregister_nf_hook();
146 dev->l3mdev_ops = NULL;
148 netdev_rx_handler_unregister(dev);
149 cancel_work_sync(&port->wq);
150 while ((skb = __skb_dequeue(&port->backlog)) != NULL) {
155 ida_destroy(&port->ida);
159 #define IPVLAN_FEATURES \
160 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
161 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
162 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
163 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
165 #define IPVLAN_STATE_MASK \
166 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
168 static int ipvlan_init(struct net_device *dev)
170 struct ipvl_dev *ipvlan = netdev_priv(dev);
171 const struct net_device *phy_dev = ipvlan->phy_dev;
172 struct ipvl_port *port = ipvlan->port;
174 dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
175 (phy_dev->state & IPVLAN_STATE_MASK);
176 dev->features = phy_dev->features & IPVLAN_FEATURES;
177 dev->features |= NETIF_F_LLTX;
178 dev->gso_max_size = phy_dev->gso_max_size;
179 dev->gso_max_segs = phy_dev->gso_max_segs;
180 dev->hard_header_len = phy_dev->hard_header_len;
182 netdev_lockdep_set_classes(dev);
184 ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats);
185 if (!ipvlan->pcpu_stats)
193 static void ipvlan_uninit(struct net_device *dev)
195 struct ipvl_dev *ipvlan = netdev_priv(dev);
196 struct ipvl_port *port = ipvlan->port;
198 free_percpu(ipvlan->pcpu_stats);
202 ipvlan_port_destroy(port->dev);
205 static int ipvlan_open(struct net_device *dev)
207 struct ipvl_dev *ipvlan = netdev_priv(dev);
208 struct net_device *phy_dev = ipvlan->phy_dev;
209 struct ipvl_addr *addr;
211 if (ipvlan->port->mode == IPVLAN_MODE_L3 ||
212 ipvlan->port->mode == IPVLAN_MODE_L3S)
213 dev->flags |= IFF_NOARP;
215 dev->flags &= ~IFF_NOARP;
217 list_for_each_entry(addr, &ipvlan->addrs, anode)
218 ipvlan_ht_addr_add(ipvlan, addr);
220 return dev_uc_add(phy_dev, phy_dev->dev_addr);
223 static int ipvlan_stop(struct net_device *dev)
225 struct ipvl_dev *ipvlan = netdev_priv(dev);
226 struct net_device *phy_dev = ipvlan->phy_dev;
227 struct ipvl_addr *addr;
229 dev_uc_unsync(phy_dev, dev);
230 dev_mc_unsync(phy_dev, dev);
232 dev_uc_del(phy_dev, phy_dev->dev_addr);
234 list_for_each_entry(addr, &ipvlan->addrs, anode)
235 ipvlan_ht_addr_del(addr);
240 static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
241 struct net_device *dev)
243 const struct ipvl_dev *ipvlan = netdev_priv(dev);
244 int skblen = skb->len;
247 ret = ipvlan_queue_xmit(skb, dev);
248 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
249 struct ipvl_pcpu_stats *pcptr;
251 pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
253 u64_stats_update_begin(&pcptr->syncp);
255 pcptr->tx_bytes += skblen;
256 u64_stats_update_end(&pcptr->syncp);
258 this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
263 static netdev_features_t ipvlan_fix_features(struct net_device *dev,
264 netdev_features_t features)
266 struct ipvl_dev *ipvlan = netdev_priv(dev);
268 return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
271 static void ipvlan_change_rx_flags(struct net_device *dev, int change)
273 struct ipvl_dev *ipvlan = netdev_priv(dev);
274 struct net_device *phy_dev = ipvlan->phy_dev;
276 if (change & IFF_ALLMULTI)
277 dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
280 static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
282 struct ipvl_dev *ipvlan = netdev_priv(dev);
284 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
285 bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
287 struct netdev_hw_addr *ha;
288 DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
290 bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
291 netdev_for_each_mc_addr(ha, dev)
292 __set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
294 /* Turn-on broadcast bit irrespective of address family,
295 * since broadcast is deferred to a work-queue, hence no
296 * impact on fast-path processing.
298 __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters);
300 bitmap_copy(ipvlan->mac_filters, mc_filters,
301 IPVLAN_MAC_FILTER_SIZE);
303 dev_uc_sync(ipvlan->phy_dev, dev);
304 dev_mc_sync(ipvlan->phy_dev, dev);
307 static void ipvlan_get_stats64(struct net_device *dev,
308 struct rtnl_link_stats64 *s)
310 struct ipvl_dev *ipvlan = netdev_priv(dev);
312 if (ipvlan->pcpu_stats) {
313 struct ipvl_pcpu_stats *pcptr;
314 u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
315 u32 rx_errs = 0, tx_drps = 0;
319 for_each_possible_cpu(idx) {
320 pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
322 strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
323 rx_pkts = pcptr->rx_pkts;
324 rx_bytes = pcptr->rx_bytes;
325 rx_mcast = pcptr->rx_mcast;
326 tx_pkts = pcptr->tx_pkts;
327 tx_bytes = pcptr->tx_bytes;
328 } while (u64_stats_fetch_retry_irq(&pcptr->syncp,
331 s->rx_packets += rx_pkts;
332 s->rx_bytes += rx_bytes;
333 s->multicast += rx_mcast;
334 s->tx_packets += tx_pkts;
335 s->tx_bytes += tx_bytes;
337 /* u32 values are updated without syncp protection. */
338 rx_errs += pcptr->rx_errs;
339 tx_drps += pcptr->tx_drps;
341 s->rx_errors = rx_errs;
342 s->rx_dropped = rx_errs;
343 s->tx_dropped = tx_drps;
347 static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
349 struct ipvl_dev *ipvlan = netdev_priv(dev);
350 struct net_device *phy_dev = ipvlan->phy_dev;
352 return vlan_vid_add(phy_dev, proto, vid);
355 static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
358 struct ipvl_dev *ipvlan = netdev_priv(dev);
359 struct net_device *phy_dev = ipvlan->phy_dev;
361 vlan_vid_del(phy_dev, proto, vid);
365 static int ipvlan_get_iflink(const struct net_device *dev)
367 struct ipvl_dev *ipvlan = netdev_priv(dev);
369 return ipvlan->phy_dev->ifindex;
372 static const struct net_device_ops ipvlan_netdev_ops = {
373 .ndo_init = ipvlan_init,
374 .ndo_uninit = ipvlan_uninit,
375 .ndo_open = ipvlan_open,
376 .ndo_stop = ipvlan_stop,
377 .ndo_start_xmit = ipvlan_start_xmit,
378 .ndo_fix_features = ipvlan_fix_features,
379 .ndo_change_rx_flags = ipvlan_change_rx_flags,
380 .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
381 .ndo_get_stats64 = ipvlan_get_stats64,
382 .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
383 .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
384 .ndo_get_iflink = ipvlan_get_iflink,
387 static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
388 unsigned short type, const void *daddr,
389 const void *saddr, unsigned len)
391 const struct ipvl_dev *ipvlan = netdev_priv(dev);
392 struct net_device *phy_dev = ipvlan->phy_dev;
394 /* TODO Probably use a different field than dev_addr so that the
395 * mac-address on the virtual device is portable and can be carried
396 * while the packets use the mac-addr on the physical device.
398 return dev_hard_header(skb, phy_dev, type, daddr,
399 saddr ? : dev->dev_addr, len);
402 static const struct header_ops ipvlan_header_ops = {
403 .create = ipvlan_hard_header,
404 .parse = eth_header_parse,
405 .cache = eth_header_cache,
406 .cache_update = eth_header_cache_update,
409 static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev,
410 struct ethtool_link_ksettings *cmd)
412 const struct ipvl_dev *ipvlan = netdev_priv(dev);
414 return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd);
417 static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
418 struct ethtool_drvinfo *drvinfo)
420 strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
421 strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
424 static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
426 const struct ipvl_dev *ipvlan = netdev_priv(dev);
428 return ipvlan->msg_enable;
431 static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
433 struct ipvl_dev *ipvlan = netdev_priv(dev);
435 ipvlan->msg_enable = value;
438 static const struct ethtool_ops ipvlan_ethtool_ops = {
439 .get_link = ethtool_op_get_link,
440 .get_link_ksettings = ipvlan_ethtool_get_link_ksettings,
441 .get_drvinfo = ipvlan_ethtool_get_drvinfo,
442 .get_msglevel = ipvlan_ethtool_get_msglevel,
443 .set_msglevel = ipvlan_ethtool_set_msglevel,
446 static int ipvlan_nl_changelink(struct net_device *dev,
447 struct nlattr *tb[], struct nlattr *data[])
449 struct ipvl_dev *ipvlan = netdev_priv(dev);
450 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
453 if (data && data[IFLA_IPVLAN_MODE]) {
454 u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
456 err = ipvlan_set_port_mode(port, nmode);
461 static size_t ipvlan_nl_getsize(const struct net_device *dev)
464 + nla_total_size(2) /* IFLA_IPVLAN_MODE */
468 static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[])
470 if (data && data[IFLA_IPVLAN_MODE]) {
471 u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
473 if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX)
479 static int ipvlan_nl_fillinfo(struct sk_buff *skb,
480 const struct net_device *dev)
482 struct ipvl_dev *ipvlan = netdev_priv(dev);
483 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
490 if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
499 int ipvlan_link_new(struct net *src_net, struct net_device *dev,
500 struct nlattr *tb[], struct nlattr *data[])
502 struct ipvl_dev *ipvlan = netdev_priv(dev);
503 struct ipvl_port *port;
504 struct net_device *phy_dev;
506 u16 mode = IPVLAN_MODE_L3;
512 phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
516 if (netif_is_ipvlan(phy_dev)) {
517 struct ipvl_dev *tmp = netdev_priv(phy_dev);
519 phy_dev = tmp->phy_dev;
520 } else if (!netif_is_ipvlan_port(phy_dev)) {
521 err = ipvlan_port_create(phy_dev);
527 if (data && data[IFLA_IPVLAN_MODE])
528 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
530 port = ipvlan_port_get_rtnl(phy_dev);
531 ipvlan->phy_dev = phy_dev;
534 ipvlan->sfeatures = IPVLAN_FEATURES;
535 ipvlan_adjust_mtu(ipvlan, phy_dev);
536 INIT_LIST_HEAD(&ipvlan->addrs);
538 /* If the port-id base is at the MAX value, then wrap it around and
539 * begin from 0x1 again. This may be due to a busy system where lots
540 * of slaves are getting created and deleted.
542 if (port->dev_id_start == 0xFFFE)
543 port->dev_id_start = 0x1;
545 /* Since L2 address is shared among all IPvlan slaves including
546 * master, use unique 16 bit dev-ids to diffentiate among them.
547 * Assign IDs between 0x1 and 0xFFFE (used by the master) to each
548 * slave link [see addrconf_ifid_eui48()].
550 err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE,
553 err = ida_simple_get(&port->ida, 0x1, port->dev_id_start,
556 goto destroy_ipvlan_port;
558 /* Increment id-base to the next slot for the future assignment */
559 port->dev_id_start = err + 1;
561 /* TODO Probably put random address here to be presented to the
562 * world but keep using the physical-dev address for the outgoing
565 memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
567 dev->priv_flags |= IFF_IPVLAN_SLAVE;
569 err = register_netdevice(dev);
573 err = netdev_upper_dev_link(phy_dev, dev);
575 goto unregister_netdev;
577 err = ipvlan_set_port_mode(port, mode);
582 list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
583 netif_stacked_transfer_operstate(phy_dev, dev);
587 netdev_upper_dev_unlink(phy_dev, dev);
589 unregister_netdevice(dev);
591 ida_simple_remove(&port->ida, dev->dev_id);
594 ipvlan_port_destroy(phy_dev);
597 EXPORT_SYMBOL_GPL(ipvlan_link_new);
599 void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
601 struct ipvl_dev *ipvlan = netdev_priv(dev);
602 struct ipvl_addr *addr, *next;
604 list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
605 ipvlan_ht_addr_del(addr);
606 list_del(&addr->anode);
607 kfree_rcu(addr, rcu);
610 ida_simple_remove(&ipvlan->port->ida, dev->dev_id);
611 list_del_rcu(&ipvlan->pnode);
612 unregister_netdevice_queue(dev, head);
613 netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
615 EXPORT_SYMBOL_GPL(ipvlan_link_delete);
617 void ipvlan_link_setup(struct net_device *dev)
621 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
622 dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE;
623 dev->netdev_ops = &ipvlan_netdev_ops;
624 dev->destructor = free_netdev;
625 dev->header_ops = &ipvlan_header_ops;
626 dev->ethtool_ops = &ipvlan_ethtool_ops;
628 EXPORT_SYMBOL_GPL(ipvlan_link_setup);
630 static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
632 [IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
635 static struct rtnl_link_ops ipvlan_link_ops = {
637 .priv_size = sizeof(struct ipvl_dev),
639 .setup = ipvlan_link_setup,
640 .newlink = ipvlan_link_new,
641 .dellink = ipvlan_link_delete,
644 int ipvlan_link_register(struct rtnl_link_ops *ops)
646 ops->get_size = ipvlan_nl_getsize;
647 ops->policy = ipvlan_nl_policy;
648 ops->validate = ipvlan_nl_validate;
649 ops->fill_info = ipvlan_nl_fillinfo;
650 ops->changelink = ipvlan_nl_changelink;
651 ops->maxtype = IFLA_IPVLAN_MAX;
652 return rtnl_link_register(ops);
654 EXPORT_SYMBOL_GPL(ipvlan_link_register);
656 static int ipvlan_device_event(struct notifier_block *unused,
657 unsigned long event, void *ptr)
659 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
660 struct ipvl_dev *ipvlan, *next;
661 struct ipvl_port *port;
664 if (!netif_is_ipvlan_port(dev))
667 port = ipvlan_port_get_rtnl(dev);
671 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
672 netif_stacked_transfer_operstate(ipvlan->phy_dev,
676 case NETDEV_UNREGISTER:
677 if (dev->reg_state != NETREG_UNREGISTERING)
680 list_for_each_entry_safe(ipvlan, next, &port->ipvlans,
682 ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
684 unregister_netdevice_many(&lst_kill);
687 case NETDEV_FEAT_CHANGE:
688 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
689 ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
690 ipvlan->dev->gso_max_size = dev->gso_max_size;
691 ipvlan->dev->gso_max_segs = dev->gso_max_segs;
692 netdev_features_change(ipvlan->dev);
696 case NETDEV_CHANGEMTU:
697 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
698 ipvlan_adjust_mtu(ipvlan, dev);
701 case NETDEV_PRE_TYPE_CHANGE:
702 /* Forbid underlying device to change its type. */
708 static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
710 struct ipvl_addr *addr;
712 addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
716 addr->master = ipvlan;
718 memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr));
719 addr->atype = IPVL_IPV6;
721 memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr));
722 addr->atype = IPVL_IPV4;
724 list_add_tail(&addr->anode, &ipvlan->addrs);
726 /* If the interface is not up, the address will be added to the hash
727 * list by ipvlan_open.
729 if (netif_running(ipvlan->dev))
730 ipvlan_ht_addr_add(ipvlan, addr);
735 static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
737 struct ipvl_addr *addr;
739 addr = ipvlan_find_addr(ipvlan, iaddr, is_v6);
743 ipvlan_ht_addr_del(addr);
744 list_del(&addr->anode);
745 kfree_rcu(addr, rcu);
750 static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
752 if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
753 netif_err(ipvlan, ifup, ipvlan->dev,
754 "Failed to add IPv6=%pI6c addr for %s intf\n",
755 ip6_addr, ipvlan->dev->name);
759 return ipvlan_add_addr(ipvlan, ip6_addr, true);
762 static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
764 return ipvlan_del_addr(ipvlan, ip6_addr, true);
767 static int ipvlan_addr6_event(struct notifier_block *unused,
768 unsigned long event, void *ptr)
770 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
771 struct net_device *dev = (struct net_device *)if6->idev->dev;
772 struct ipvl_dev *ipvlan = netdev_priv(dev);
774 /* FIXME IPv6 autoconf calls us from bh without RTNL */
778 if (!netif_is_ipvlan(dev))
781 if (!ipvlan || !ipvlan->port)
786 if (ipvlan_add_addr6(ipvlan, &if6->addr))
791 ipvlan_del_addr6(ipvlan, &if6->addr);
798 static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
800 if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) {
801 netif_err(ipvlan, ifup, ipvlan->dev,
802 "Failed to add IPv4=%pI4 on %s intf.\n",
803 ip4_addr, ipvlan->dev->name);
807 return ipvlan_add_addr(ipvlan, ip4_addr, false);
810 static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
812 return ipvlan_del_addr(ipvlan, ip4_addr, false);
815 static int ipvlan_addr4_event(struct notifier_block *unused,
816 unsigned long event, void *ptr)
818 struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
819 struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
820 struct ipvl_dev *ipvlan = netdev_priv(dev);
821 struct in_addr ip4_addr;
823 if (!netif_is_ipvlan(dev))
826 if (!ipvlan || !ipvlan->port)
831 ip4_addr.s_addr = if4->ifa_address;
832 if (ipvlan_add_addr4(ipvlan, &ip4_addr))
837 ip4_addr.s_addr = if4->ifa_address;
838 ipvlan_del_addr4(ipvlan, &ip4_addr);
845 static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
846 .notifier_call = ipvlan_addr4_event,
849 static struct notifier_block ipvlan_notifier_block __read_mostly = {
850 .notifier_call = ipvlan_device_event,
853 static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
854 .notifier_call = ipvlan_addr6_event,
857 static int __init ipvlan_init_module(void)
861 ipvlan_init_secret();
862 register_netdevice_notifier(&ipvlan_notifier_block);
863 register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
864 register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
866 err = ipvlan_link_register(&ipvlan_link_ops);
872 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
873 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
874 unregister_netdevice_notifier(&ipvlan_notifier_block);
878 static void __exit ipvlan_cleanup_module(void)
880 rtnl_link_unregister(&ipvlan_link_ops);
881 unregister_netdevice_notifier(&ipvlan_notifier_block);
882 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
883 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
886 module_init(ipvlan_init_module);
887 module_exit(ipvlan_cleanup_module);
889 MODULE_LICENSE("GPL");
890 MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
891 MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
892 MODULE_ALIAS_RTNL_LINK("ipvlan");