1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
7 static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval,
8 struct netlink_ext_ack *extack)
10 struct ipvl_dev *ipvlan;
15 if (port->mode != nval) {
16 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
17 flags = ipvlan->dev->flags;
18 if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S) {
19 err = dev_change_flags(ipvlan->dev,
23 err = dev_change_flags(ipvlan->dev,
30 if (nval == IPVLAN_MODE_L3S) {
32 err = ipvlan_l3s_register(port);
35 } else if (port->mode == IPVLAN_MODE_L3S) {
36 /* Old mode was L3S */
37 ipvlan_l3s_unregister(port);
44 /* Undo the flags changes that have been done so far. */
45 list_for_each_entry_continue_reverse(ipvlan, &port->ipvlans, pnode) {
46 flags = ipvlan->dev->flags;
47 if (port->mode == IPVLAN_MODE_L3 ||
48 port->mode == IPVLAN_MODE_L3S)
49 dev_change_flags(ipvlan->dev, flags | IFF_NOARP,
52 dev_change_flags(ipvlan->dev, flags & ~IFF_NOARP,
59 static int ipvlan_port_create(struct net_device *dev)
61 struct ipvl_port *port;
64 port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL);
68 write_pnet(&port->pnet, dev_net(dev));
70 port->mode = IPVLAN_MODE_L3;
71 INIT_LIST_HEAD(&port->ipvlans);
72 for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++)
73 INIT_HLIST_HEAD(&port->hlhead[idx]);
75 skb_queue_head_init(&port->backlog);
76 INIT_WORK(&port->wq, ipvlan_process_multicast);
78 port->dev_id_start = 1;
80 err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
91 static void ipvlan_port_destroy(struct net_device *dev)
93 struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
96 if (port->mode == IPVLAN_MODE_L3S)
97 ipvlan_l3s_unregister(port);
98 netdev_rx_handler_unregister(dev);
99 cancel_work_sync(&port->wq);
100 while ((skb = __skb_dequeue(&port->backlog)) != NULL) {
105 ida_destroy(&port->ida);
109 #define IPVLAN_FEATURES \
110 (NETIF_F_SG | NETIF_F_CSUM_MASK | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
111 NETIF_F_GSO | NETIF_F_ALL_TSO | NETIF_F_GSO_ROBUST | \
112 NETIF_F_GRO | NETIF_F_RXCSUM | \
113 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
115 #define IPVLAN_STATE_MASK \
116 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
118 static int ipvlan_init(struct net_device *dev)
120 struct ipvl_dev *ipvlan = netdev_priv(dev);
121 struct net_device *phy_dev = ipvlan->phy_dev;
122 struct ipvl_port *port;
125 dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
126 (phy_dev->state & IPVLAN_STATE_MASK);
127 dev->features = phy_dev->features & IPVLAN_FEATURES;
128 dev->features |= NETIF_F_LLTX | NETIF_F_VLAN_CHALLENGED;
129 dev->hw_enc_features |= dev->features;
130 dev->gso_max_size = phy_dev->gso_max_size;
131 dev->gso_max_segs = phy_dev->gso_max_segs;
132 dev->hard_header_len = phy_dev->hard_header_len;
134 ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats);
135 if (!ipvlan->pcpu_stats)
138 if (!netif_is_ipvlan_port(phy_dev)) {
139 err = ipvlan_port_create(phy_dev);
141 free_percpu(ipvlan->pcpu_stats);
145 port = ipvlan_port_get_rtnl(phy_dev);
150 static void ipvlan_uninit(struct net_device *dev)
152 struct ipvl_dev *ipvlan = netdev_priv(dev);
153 struct net_device *phy_dev = ipvlan->phy_dev;
154 struct ipvl_port *port;
156 free_percpu(ipvlan->pcpu_stats);
158 port = ipvlan_port_get_rtnl(phy_dev);
161 ipvlan_port_destroy(port->dev);
164 static int ipvlan_open(struct net_device *dev)
166 struct ipvl_dev *ipvlan = netdev_priv(dev);
167 struct ipvl_addr *addr;
169 if (ipvlan->port->mode == IPVLAN_MODE_L3 ||
170 ipvlan->port->mode == IPVLAN_MODE_L3S)
171 dev->flags |= IFF_NOARP;
173 dev->flags &= ~IFF_NOARP;
176 list_for_each_entry_rcu(addr, &ipvlan->addrs, anode)
177 ipvlan_ht_addr_add(ipvlan, addr);
183 static int ipvlan_stop(struct net_device *dev)
185 struct ipvl_dev *ipvlan = netdev_priv(dev);
186 struct net_device *phy_dev = ipvlan->phy_dev;
187 struct ipvl_addr *addr;
189 dev_uc_unsync(phy_dev, dev);
190 dev_mc_unsync(phy_dev, dev);
193 list_for_each_entry_rcu(addr, &ipvlan->addrs, anode)
194 ipvlan_ht_addr_del(addr);
200 static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
201 struct net_device *dev)
203 const struct ipvl_dev *ipvlan = netdev_priv(dev);
204 int skblen = skb->len;
207 ret = ipvlan_queue_xmit(skb, dev);
208 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
209 struct ipvl_pcpu_stats *pcptr;
211 pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
213 u64_stats_update_begin(&pcptr->syncp);
215 pcptr->tx_bytes += skblen;
216 u64_stats_update_end(&pcptr->syncp);
218 this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
223 static netdev_features_t ipvlan_fix_features(struct net_device *dev,
224 netdev_features_t features)
226 struct ipvl_dev *ipvlan = netdev_priv(dev);
228 return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
231 static void ipvlan_change_rx_flags(struct net_device *dev, int change)
233 struct ipvl_dev *ipvlan = netdev_priv(dev);
234 struct net_device *phy_dev = ipvlan->phy_dev;
236 if (change & IFF_ALLMULTI)
237 dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
240 static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
242 struct ipvl_dev *ipvlan = netdev_priv(dev);
244 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
245 bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
247 struct netdev_hw_addr *ha;
248 DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
250 bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
251 netdev_for_each_mc_addr(ha, dev)
252 __set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
254 /* Turn-on broadcast bit irrespective of address family,
255 * since broadcast is deferred to a work-queue, hence no
256 * impact on fast-path processing.
258 __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters);
260 bitmap_copy(ipvlan->mac_filters, mc_filters,
261 IPVLAN_MAC_FILTER_SIZE);
263 dev_uc_sync(ipvlan->phy_dev, dev);
264 dev_mc_sync(ipvlan->phy_dev, dev);
267 static void ipvlan_get_stats64(struct net_device *dev,
268 struct rtnl_link_stats64 *s)
270 struct ipvl_dev *ipvlan = netdev_priv(dev);
272 if (ipvlan->pcpu_stats) {
273 struct ipvl_pcpu_stats *pcptr;
274 u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
275 u32 rx_errs = 0, tx_drps = 0;
279 for_each_possible_cpu(idx) {
280 pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
282 strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
283 rx_pkts = pcptr->rx_pkts;
284 rx_bytes = pcptr->rx_bytes;
285 rx_mcast = pcptr->rx_mcast;
286 tx_pkts = pcptr->tx_pkts;
287 tx_bytes = pcptr->tx_bytes;
288 } while (u64_stats_fetch_retry_irq(&pcptr->syncp,
291 s->rx_packets += rx_pkts;
292 s->rx_bytes += rx_bytes;
293 s->multicast += rx_mcast;
294 s->tx_packets += tx_pkts;
295 s->tx_bytes += tx_bytes;
297 /* u32 values are updated without syncp protection. */
298 rx_errs += pcptr->rx_errs;
299 tx_drps += pcptr->tx_drps;
301 s->rx_errors = rx_errs;
302 s->rx_dropped = rx_errs;
303 s->tx_dropped = tx_drps;
307 static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
309 struct ipvl_dev *ipvlan = netdev_priv(dev);
310 struct net_device *phy_dev = ipvlan->phy_dev;
312 return vlan_vid_add(phy_dev, proto, vid);
315 static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
318 struct ipvl_dev *ipvlan = netdev_priv(dev);
319 struct net_device *phy_dev = ipvlan->phy_dev;
321 vlan_vid_del(phy_dev, proto, vid);
325 static int ipvlan_get_iflink(const struct net_device *dev)
327 struct ipvl_dev *ipvlan = netdev_priv(dev);
329 return ipvlan->phy_dev->ifindex;
332 static const struct net_device_ops ipvlan_netdev_ops = {
333 .ndo_init = ipvlan_init,
334 .ndo_uninit = ipvlan_uninit,
335 .ndo_open = ipvlan_open,
336 .ndo_stop = ipvlan_stop,
337 .ndo_start_xmit = ipvlan_start_xmit,
338 .ndo_fix_features = ipvlan_fix_features,
339 .ndo_change_rx_flags = ipvlan_change_rx_flags,
340 .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
341 .ndo_get_stats64 = ipvlan_get_stats64,
342 .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
343 .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
344 .ndo_get_iflink = ipvlan_get_iflink,
347 static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
348 unsigned short type, const void *daddr,
349 const void *saddr, unsigned len)
351 const struct ipvl_dev *ipvlan = netdev_priv(dev);
352 struct net_device *phy_dev = ipvlan->phy_dev;
354 /* TODO Probably use a different field than dev_addr so that the
355 * mac-address on the virtual device is portable and can be carried
356 * while the packets use the mac-addr on the physical device.
358 return dev_hard_header(skb, phy_dev, type, daddr,
359 saddr ? : phy_dev->dev_addr, len);
362 static const struct header_ops ipvlan_header_ops = {
363 .create = ipvlan_hard_header,
364 .parse = eth_header_parse,
365 .cache = eth_header_cache,
366 .cache_update = eth_header_cache_update,
369 static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
371 ipvlan->dev->mtu = dev->mtu;
374 static bool netif_is_ipvlan(const struct net_device *dev)
376 /* both ipvlan and ipvtap devices use the same netdev_ops */
377 return dev->netdev_ops == &ipvlan_netdev_ops;
380 static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev,
381 struct ethtool_link_ksettings *cmd)
383 const struct ipvl_dev *ipvlan = netdev_priv(dev);
385 return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd);
388 static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
389 struct ethtool_drvinfo *drvinfo)
391 strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
392 strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
395 static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
397 const struct ipvl_dev *ipvlan = netdev_priv(dev);
399 return ipvlan->msg_enable;
402 static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
404 struct ipvl_dev *ipvlan = netdev_priv(dev);
406 ipvlan->msg_enable = value;
409 static const struct ethtool_ops ipvlan_ethtool_ops = {
410 .get_link = ethtool_op_get_link,
411 .get_link_ksettings = ipvlan_ethtool_get_link_ksettings,
412 .get_drvinfo = ipvlan_ethtool_get_drvinfo,
413 .get_msglevel = ipvlan_ethtool_get_msglevel,
414 .set_msglevel = ipvlan_ethtool_set_msglevel,
417 static int ipvlan_nl_changelink(struct net_device *dev,
418 struct nlattr *tb[], struct nlattr *data[],
419 struct netlink_ext_ack *extack)
421 struct ipvl_dev *ipvlan = netdev_priv(dev);
422 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
427 if (!ns_capable(dev_net(ipvlan->phy_dev)->user_ns, CAP_NET_ADMIN))
430 if (data[IFLA_IPVLAN_MODE]) {
431 u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
433 err = ipvlan_set_port_mode(port, nmode, extack);
436 if (!err && data[IFLA_IPVLAN_FLAGS]) {
437 u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]);
439 if (flags & IPVLAN_F_PRIVATE)
440 ipvlan_mark_private(port);
442 ipvlan_clear_private(port);
444 if (flags & IPVLAN_F_VEPA)
445 ipvlan_mark_vepa(port);
447 ipvlan_clear_vepa(port);
453 static size_t ipvlan_nl_getsize(const struct net_device *dev)
456 + nla_total_size(2) /* IFLA_IPVLAN_MODE */
457 + nla_total_size(2) /* IFLA_IPVLAN_FLAGS */
461 static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[],
462 struct netlink_ext_ack *extack)
467 if (data[IFLA_IPVLAN_MODE]) {
468 u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
470 if (mode >= IPVLAN_MODE_MAX)
473 if (data[IFLA_IPVLAN_FLAGS]) {
474 u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]);
476 /* Only two bits are used at this moment. */
477 if (flags & ~(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA))
479 /* Also both flags can't be active at the same time. */
480 if ((flags & (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) ==
481 (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA))
488 static int ipvlan_nl_fillinfo(struct sk_buff *skb,
489 const struct net_device *dev)
491 struct ipvl_dev *ipvlan = netdev_priv(dev);
492 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
499 if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
501 if (nla_put_u16(skb, IFLA_IPVLAN_FLAGS, port->flags))
510 int ipvlan_link_new(struct net *src_net, struct net_device *dev,
511 struct nlattr *tb[], struct nlattr *data[],
512 struct netlink_ext_ack *extack)
514 struct ipvl_dev *ipvlan = netdev_priv(dev);
515 struct ipvl_port *port;
516 struct net_device *phy_dev;
518 u16 mode = IPVLAN_MODE_L3;
523 phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
527 if (netif_is_ipvlan(phy_dev)) {
528 struct ipvl_dev *tmp = netdev_priv(phy_dev);
530 phy_dev = tmp->phy_dev;
531 if (!ns_capable(dev_net(phy_dev)->user_ns, CAP_NET_ADMIN))
533 } else if (!netif_is_ipvlan_port(phy_dev)) {
534 /* Exit early if the underlying link is invalid or busy */
535 if (phy_dev->type != ARPHRD_ETHER ||
536 phy_dev->flags & IFF_LOOPBACK) {
538 "Master is either lo or non-ether device\n");
542 if (netdev_is_rx_handler_busy(phy_dev)) {
543 netdev_err(phy_dev, "Device is already in use.\n");
548 ipvlan->phy_dev = phy_dev;
550 ipvlan->sfeatures = IPVLAN_FEATURES;
552 ipvlan_adjust_mtu(ipvlan, phy_dev);
553 INIT_LIST_HEAD(&ipvlan->addrs);
554 spin_lock_init(&ipvlan->addrs_lock);
556 /* TODO Probably put random address here to be presented to the
557 * world but keep using the physical-dev address for the outgoing
560 memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
562 dev->priv_flags |= IFF_NO_RX_HANDLER;
564 err = register_netdevice(dev);
568 /* ipvlan_init() would have created the port, if required */
569 port = ipvlan_port_get_rtnl(phy_dev);
572 /* If the port-id base is at the MAX value, then wrap it around and
573 * begin from 0x1 again. This may be due to a busy system where lots
574 * of slaves are getting created and deleted.
576 if (port->dev_id_start == 0xFFFE)
577 port->dev_id_start = 0x1;
579 /* Since L2 address is shared among all IPvlan slaves including
580 * master, use unique 16 bit dev-ids to diffentiate among them.
581 * Assign IDs between 0x1 and 0xFFFE (used by the master) to each
582 * slave link [see addrconf_ifid_eui48()].
584 err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE,
587 err = ida_simple_get(&port->ida, 0x1, port->dev_id_start,
590 goto unregister_netdev;
593 /* Increment id-base to the next slot for the future assignment */
594 port->dev_id_start = err + 1;
596 err = netdev_upper_dev_link(phy_dev, dev, extack);
600 /* Flags are per port and latest update overrides. User has
601 * to be consistent in setting it just like the mode attribute.
603 if (data && data[IFLA_IPVLAN_FLAGS])
604 port->flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]);
606 if (data && data[IFLA_IPVLAN_MODE])
607 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
609 err = ipvlan_set_port_mode(port, mode, extack);
613 list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
614 netif_stacked_transfer_operstate(phy_dev, dev);
618 netdev_upper_dev_unlink(phy_dev, dev);
620 ida_simple_remove(&port->ida, dev->dev_id);
622 unregister_netdevice(dev);
625 EXPORT_SYMBOL_GPL(ipvlan_link_new);
627 void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
629 struct ipvl_dev *ipvlan = netdev_priv(dev);
630 struct ipvl_addr *addr, *next;
632 spin_lock_bh(&ipvlan->addrs_lock);
633 list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
634 ipvlan_ht_addr_del(addr);
635 list_del_rcu(&addr->anode);
636 kfree_rcu(addr, rcu);
638 spin_unlock_bh(&ipvlan->addrs_lock);
640 ida_simple_remove(&ipvlan->port->ida, dev->dev_id);
641 list_del_rcu(&ipvlan->pnode);
642 unregister_netdevice_queue(dev, head);
643 netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
645 EXPORT_SYMBOL_GPL(ipvlan_link_delete);
647 void ipvlan_link_setup(struct net_device *dev)
651 dev->max_mtu = ETH_MAX_MTU;
652 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
653 dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE;
654 dev->netdev_ops = &ipvlan_netdev_ops;
655 dev->needs_free_netdev = true;
656 dev->header_ops = &ipvlan_header_ops;
657 dev->ethtool_ops = &ipvlan_ethtool_ops;
659 EXPORT_SYMBOL_GPL(ipvlan_link_setup);
661 static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
663 [IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
664 [IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 },
667 static struct rtnl_link_ops ipvlan_link_ops = {
669 .priv_size = sizeof(struct ipvl_dev),
671 .setup = ipvlan_link_setup,
672 .newlink = ipvlan_link_new,
673 .dellink = ipvlan_link_delete,
676 int ipvlan_link_register(struct rtnl_link_ops *ops)
678 ops->get_size = ipvlan_nl_getsize;
679 ops->policy = ipvlan_nl_policy;
680 ops->validate = ipvlan_nl_validate;
681 ops->fill_info = ipvlan_nl_fillinfo;
682 ops->changelink = ipvlan_nl_changelink;
683 ops->maxtype = IFLA_IPVLAN_MAX;
684 return rtnl_link_register(ops);
686 EXPORT_SYMBOL_GPL(ipvlan_link_register);
688 static int ipvlan_device_event(struct notifier_block *unused,
689 unsigned long event, void *ptr)
691 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
692 struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
693 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
694 struct ipvl_dev *ipvlan, *next;
695 struct ipvl_port *port;
699 if (!netif_is_ipvlan_port(dev))
702 port = ipvlan_port_get_rtnl(dev);
706 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
707 netif_stacked_transfer_operstate(ipvlan->phy_dev,
711 case NETDEV_REGISTER: {
712 struct net *oldnet, *newnet = dev_net(dev);
714 oldnet = read_pnet(&port->pnet);
715 if (net_eq(newnet, oldnet))
718 write_pnet(&port->pnet, newnet);
720 ipvlan_migrate_l3s_hook(oldnet, newnet);
723 case NETDEV_UNREGISTER:
724 if (dev->reg_state != NETREG_UNREGISTERING)
727 list_for_each_entry_safe(ipvlan, next, &port->ipvlans, pnode)
728 ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
730 unregister_netdevice_many(&lst_kill);
733 case NETDEV_FEAT_CHANGE:
734 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
735 ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
736 ipvlan->dev->gso_max_size = dev->gso_max_size;
737 ipvlan->dev->gso_max_segs = dev->gso_max_segs;
738 netdev_features_change(ipvlan->dev);
742 case NETDEV_CHANGEMTU:
743 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
744 ipvlan_adjust_mtu(ipvlan, dev);
747 case NETDEV_PRE_CHANGEADDR:
748 prechaddr_info = ptr;
749 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
750 err = dev_pre_changeaddr_notify(ipvlan->dev,
751 prechaddr_info->dev_addr,
754 return notifier_from_errno(err);
758 case NETDEV_CHANGEADDR:
759 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
760 ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr);
761 call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev);
765 case NETDEV_PRE_TYPE_CHANGE:
766 /* Forbid underlying device to change its type. */
772 /* the caller must held the addrs lock */
773 static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
775 struct ipvl_addr *addr;
777 addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
781 addr->master = ipvlan;
783 memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr));
784 addr->atype = IPVL_IPV4;
785 #if IS_ENABLED(CONFIG_IPV6)
787 memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr));
788 addr->atype = IPVL_IPV6;
792 list_add_tail_rcu(&addr->anode, &ipvlan->addrs);
794 /* If the interface is not up, the address will be added to the hash
795 * list by ipvlan_open.
797 if (netif_running(ipvlan->dev))
798 ipvlan_ht_addr_add(ipvlan, addr);
803 static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
805 struct ipvl_addr *addr;
807 spin_lock_bh(&ipvlan->addrs_lock);
808 addr = ipvlan_find_addr(ipvlan, iaddr, is_v6);
810 spin_unlock_bh(&ipvlan->addrs_lock);
814 ipvlan_ht_addr_del(addr);
815 list_del_rcu(&addr->anode);
816 spin_unlock_bh(&ipvlan->addrs_lock);
817 kfree_rcu(addr, rcu);
820 static bool ipvlan_is_valid_dev(const struct net_device *dev)
822 struct ipvl_dev *ipvlan = netdev_priv(dev);
824 if (!netif_is_ipvlan(dev))
827 if (!ipvlan || !ipvlan->port)
833 #if IS_ENABLED(CONFIG_IPV6)
834 static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
838 spin_lock_bh(&ipvlan->addrs_lock);
839 if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true))
840 netif_err(ipvlan, ifup, ipvlan->dev,
841 "Failed to add IPv6=%pI6c addr for %s intf\n",
842 ip6_addr, ipvlan->dev->name);
844 ret = ipvlan_add_addr(ipvlan, ip6_addr, true);
845 spin_unlock_bh(&ipvlan->addrs_lock);
849 static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
851 return ipvlan_del_addr(ipvlan, ip6_addr, true);
854 static int ipvlan_addr6_event(struct notifier_block *unused,
855 unsigned long event, void *ptr)
857 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
858 struct net_device *dev = (struct net_device *)if6->idev->dev;
859 struct ipvl_dev *ipvlan = netdev_priv(dev);
861 if (!ipvlan_is_valid_dev(dev))
866 if (ipvlan_add_addr6(ipvlan, &if6->addr))
871 ipvlan_del_addr6(ipvlan, &if6->addr);
878 static int ipvlan_addr6_validator_event(struct notifier_block *unused,
879 unsigned long event, void *ptr)
881 struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr;
882 struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev;
883 struct ipvl_dev *ipvlan = netdev_priv(dev);
885 if (!ipvlan_is_valid_dev(dev))
890 if (ipvlan_addr_busy(ipvlan->port, &i6vi->i6vi_addr, true)) {
891 NL_SET_ERR_MSG(i6vi->extack,
892 "Address already assigned to an ipvlan device");
893 return notifier_from_errno(-EADDRINUSE);
902 static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
906 spin_lock_bh(&ipvlan->addrs_lock);
907 if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false))
908 netif_err(ipvlan, ifup, ipvlan->dev,
909 "Failed to add IPv4=%pI4 on %s intf.\n",
910 ip4_addr, ipvlan->dev->name);
912 ret = ipvlan_add_addr(ipvlan, ip4_addr, false);
913 spin_unlock_bh(&ipvlan->addrs_lock);
917 static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
919 return ipvlan_del_addr(ipvlan, ip4_addr, false);
922 static int ipvlan_addr4_event(struct notifier_block *unused,
923 unsigned long event, void *ptr)
925 struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
926 struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
927 struct ipvl_dev *ipvlan = netdev_priv(dev);
928 struct in_addr ip4_addr;
930 if (!ipvlan_is_valid_dev(dev))
935 ip4_addr.s_addr = if4->ifa_address;
936 if (ipvlan_add_addr4(ipvlan, &ip4_addr))
941 ip4_addr.s_addr = if4->ifa_address;
942 ipvlan_del_addr4(ipvlan, &ip4_addr);
949 static int ipvlan_addr4_validator_event(struct notifier_block *unused,
950 unsigned long event, void *ptr)
952 struct in_validator_info *ivi = (struct in_validator_info *)ptr;
953 struct net_device *dev = (struct net_device *)ivi->ivi_dev->dev;
954 struct ipvl_dev *ipvlan = netdev_priv(dev);
956 if (!ipvlan_is_valid_dev(dev))
961 if (ipvlan_addr_busy(ipvlan->port, &ivi->ivi_addr, false)) {
962 NL_SET_ERR_MSG(ivi->extack,
963 "Address already assigned to an ipvlan device");
964 return notifier_from_errno(-EADDRINUSE);
972 static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
973 .notifier_call = ipvlan_addr4_event,
976 static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly = {
977 .notifier_call = ipvlan_addr4_validator_event,
980 static struct notifier_block ipvlan_notifier_block __read_mostly = {
981 .notifier_call = ipvlan_device_event,
984 #if IS_ENABLED(CONFIG_IPV6)
985 static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
986 .notifier_call = ipvlan_addr6_event,
989 static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = {
990 .notifier_call = ipvlan_addr6_validator_event,
994 static int __init ipvlan_init_module(void)
998 ipvlan_init_secret();
999 register_netdevice_notifier(&ipvlan_notifier_block);
1000 #if IS_ENABLED(CONFIG_IPV6)
1001 register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
1002 register_inet6addr_validator_notifier(
1003 &ipvlan_addr6_vtor_notifier_block);
1005 register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
1006 register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block);
1008 err = ipvlan_l3s_init();
1012 err = ipvlan_link_register(&ipvlan_link_ops);
1014 ipvlan_l3s_cleanup();
1020 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
1021 unregister_inetaddr_validator_notifier(
1022 &ipvlan_addr4_vtor_notifier_block);
1023 #if IS_ENABLED(CONFIG_IPV6)
1024 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
1025 unregister_inet6addr_validator_notifier(
1026 &ipvlan_addr6_vtor_notifier_block);
1028 unregister_netdevice_notifier(&ipvlan_notifier_block);
1032 static void __exit ipvlan_cleanup_module(void)
1034 rtnl_link_unregister(&ipvlan_link_ops);
1035 ipvlan_l3s_cleanup();
1036 unregister_netdevice_notifier(&ipvlan_notifier_block);
1037 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
1038 unregister_inetaddr_validator_notifier(
1039 &ipvlan_addr4_vtor_notifier_block);
1040 #if IS_ENABLED(CONFIG_IPV6)
1041 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
1042 unregister_inet6addr_validator_notifier(
1043 &ipvlan_addr6_vtor_notifier_block);
1047 module_init(ipvlan_init_module);
1048 module_exit(ipvlan_cleanup_module);
1050 MODULE_LICENSE("GPL");
1051 MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
1052 MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
1053 MODULE_ALIAS_RTNL_LINK("ipvlan");