1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
5 #include <linux/ethtool.h>
9 static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval,
10 struct netlink_ext_ack *extack)
12 struct ipvl_dev *ipvlan;
17 if (port->mode != nval) {
18 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
19 flags = ipvlan->dev->flags;
20 if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S) {
21 err = dev_change_flags(ipvlan->dev,
25 err = dev_change_flags(ipvlan->dev,
32 if (nval == IPVLAN_MODE_L3S) {
34 err = ipvlan_l3s_register(port);
37 } else if (port->mode == IPVLAN_MODE_L3S) {
38 /* Old mode was L3S */
39 ipvlan_l3s_unregister(port);
46 /* Undo the flags changes that have been done so far. */
47 list_for_each_entry_continue_reverse(ipvlan, &port->ipvlans, pnode) {
48 flags = ipvlan->dev->flags;
49 if (port->mode == IPVLAN_MODE_L3 ||
50 port->mode == IPVLAN_MODE_L3S)
51 dev_change_flags(ipvlan->dev, flags | IFF_NOARP,
54 dev_change_flags(ipvlan->dev, flags & ~IFF_NOARP,
61 static int ipvlan_port_create(struct net_device *dev)
63 struct ipvl_port *port;
66 port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL);
70 write_pnet(&port->pnet, dev_net(dev));
72 port->mode = IPVLAN_MODE_L3;
73 INIT_LIST_HEAD(&port->ipvlans);
74 for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++)
75 INIT_HLIST_HEAD(&port->hlhead[idx]);
77 skb_queue_head_init(&port->backlog);
78 INIT_WORK(&port->wq, ipvlan_process_multicast);
80 port->dev_id_start = 1;
82 err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
93 static void ipvlan_port_destroy(struct net_device *dev)
95 struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
98 if (port->mode == IPVLAN_MODE_L3S)
99 ipvlan_l3s_unregister(port);
100 netdev_rx_handler_unregister(dev);
101 cancel_work_sync(&port->wq);
102 while ((skb = __skb_dequeue(&port->backlog)) != NULL) {
106 ida_destroy(&port->ida);
110 #define IPVLAN_ALWAYS_ON_OFLOADS \
111 (NETIF_F_SG | NETIF_F_HW_CSUM | \
112 NETIF_F_GSO_ROBUST | NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL)
114 #define IPVLAN_ALWAYS_ON \
115 (IPVLAN_ALWAYS_ON_OFLOADS | NETIF_F_LLTX | NETIF_F_VLAN_CHALLENGED)
117 #define IPVLAN_FEATURES \
118 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
119 NETIF_F_GSO | NETIF_F_ALL_TSO | NETIF_F_GSO_ROBUST | \
120 NETIF_F_GRO | NETIF_F_RXCSUM | \
121 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
123 /* NETIF_F_GSO_ENCAP_ALL NETIF_F_GSO_SOFTWARE Newly added */
125 #define IPVLAN_STATE_MASK \
126 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
128 static int ipvlan_init(struct net_device *dev)
130 struct ipvl_dev *ipvlan = netdev_priv(dev);
131 struct net_device *phy_dev = ipvlan->phy_dev;
132 struct ipvl_port *port;
135 dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
136 (phy_dev->state & IPVLAN_STATE_MASK);
137 dev->features = phy_dev->features & IPVLAN_FEATURES;
138 dev->features |= IPVLAN_ALWAYS_ON;
139 dev->vlan_features = phy_dev->vlan_features & IPVLAN_FEATURES;
140 dev->vlan_features |= IPVLAN_ALWAYS_ON_OFLOADS;
141 dev->hw_enc_features |= dev->features;
142 netif_set_gso_max_size(dev, phy_dev->gso_max_size);
143 netif_set_gso_max_segs(dev, phy_dev->gso_max_segs);
144 dev->hard_header_len = phy_dev->hard_header_len;
146 netdev_lockdep_set_classes(dev);
148 ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats);
149 if (!ipvlan->pcpu_stats)
152 if (!netif_is_ipvlan_port(phy_dev)) {
153 err = ipvlan_port_create(phy_dev);
155 free_percpu(ipvlan->pcpu_stats);
159 port = ipvlan_port_get_rtnl(phy_dev);
164 static void ipvlan_uninit(struct net_device *dev)
166 struct ipvl_dev *ipvlan = netdev_priv(dev);
167 struct net_device *phy_dev = ipvlan->phy_dev;
168 struct ipvl_port *port;
170 free_percpu(ipvlan->pcpu_stats);
172 port = ipvlan_port_get_rtnl(phy_dev);
175 ipvlan_port_destroy(port->dev);
178 static int ipvlan_open(struct net_device *dev)
180 struct ipvl_dev *ipvlan = netdev_priv(dev);
181 struct ipvl_addr *addr;
183 if (ipvlan->port->mode == IPVLAN_MODE_L3 ||
184 ipvlan->port->mode == IPVLAN_MODE_L3S)
185 dev->flags |= IFF_NOARP;
187 dev->flags &= ~IFF_NOARP;
190 list_for_each_entry_rcu(addr, &ipvlan->addrs, anode)
191 ipvlan_ht_addr_add(ipvlan, addr);
197 static int ipvlan_stop(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 dev_uc_unsync(phy_dev, dev);
204 dev_mc_unsync(phy_dev, dev);
207 list_for_each_entry_rcu(addr, &ipvlan->addrs, anode)
208 ipvlan_ht_addr_del(addr);
214 static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
215 struct net_device *dev)
217 const struct ipvl_dev *ipvlan = netdev_priv(dev);
218 int skblen = skb->len;
221 ret = ipvlan_queue_xmit(skb, dev);
222 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
223 struct ipvl_pcpu_stats *pcptr;
225 pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
227 u64_stats_update_begin(&pcptr->syncp);
229 pcptr->tx_bytes += skblen;
230 u64_stats_update_end(&pcptr->syncp);
232 this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
237 static netdev_features_t ipvlan_fix_features(struct net_device *dev,
238 netdev_features_t features)
240 struct ipvl_dev *ipvlan = netdev_priv(dev);
242 features |= NETIF_F_ALL_FOR_ALL;
243 features &= (ipvlan->sfeatures | ~IPVLAN_FEATURES);
244 features = netdev_increment_features(ipvlan->phy_dev->features,
246 features |= IPVLAN_ALWAYS_ON;
247 features &= (IPVLAN_FEATURES | IPVLAN_ALWAYS_ON);
252 static void ipvlan_change_rx_flags(struct net_device *dev, int change)
254 struct ipvl_dev *ipvlan = netdev_priv(dev);
255 struct net_device *phy_dev = ipvlan->phy_dev;
257 if (change & IFF_ALLMULTI)
258 dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
261 static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
263 struct ipvl_dev *ipvlan = netdev_priv(dev);
265 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
266 bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
268 struct netdev_hw_addr *ha;
269 DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
271 bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
272 netdev_for_each_mc_addr(ha, dev)
273 __set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
275 /* Turn-on broadcast bit irrespective of address family,
276 * since broadcast is deferred to a work-queue, hence no
277 * impact on fast-path processing.
279 __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters);
281 bitmap_copy(ipvlan->mac_filters, mc_filters,
282 IPVLAN_MAC_FILTER_SIZE);
284 dev_uc_sync(ipvlan->phy_dev, dev);
285 dev_mc_sync(ipvlan->phy_dev, dev);
288 static void ipvlan_get_stats64(struct net_device *dev,
289 struct rtnl_link_stats64 *s)
291 struct ipvl_dev *ipvlan = netdev_priv(dev);
293 if (ipvlan->pcpu_stats) {
294 struct ipvl_pcpu_stats *pcptr;
295 u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
296 u32 rx_errs = 0, tx_drps = 0;
300 for_each_possible_cpu(idx) {
301 pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
303 strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
304 rx_pkts = pcptr->rx_pkts;
305 rx_bytes = pcptr->rx_bytes;
306 rx_mcast = pcptr->rx_mcast;
307 tx_pkts = pcptr->tx_pkts;
308 tx_bytes = pcptr->tx_bytes;
309 } while (u64_stats_fetch_retry_irq(&pcptr->syncp,
312 s->rx_packets += rx_pkts;
313 s->rx_bytes += rx_bytes;
314 s->multicast += rx_mcast;
315 s->tx_packets += tx_pkts;
316 s->tx_bytes += tx_bytes;
318 /* u32 values are updated without syncp protection. */
319 rx_errs += pcptr->rx_errs;
320 tx_drps += pcptr->tx_drps;
322 s->rx_errors = rx_errs;
323 s->rx_dropped = rx_errs;
324 s->tx_dropped = tx_drps;
328 static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
330 struct ipvl_dev *ipvlan = netdev_priv(dev);
331 struct net_device *phy_dev = ipvlan->phy_dev;
333 return vlan_vid_add(phy_dev, proto, vid);
336 static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
339 struct ipvl_dev *ipvlan = netdev_priv(dev);
340 struct net_device *phy_dev = ipvlan->phy_dev;
342 vlan_vid_del(phy_dev, proto, vid);
346 static int ipvlan_get_iflink(const struct net_device *dev)
348 struct ipvl_dev *ipvlan = netdev_priv(dev);
350 return ipvlan->phy_dev->ifindex;
353 static const struct net_device_ops ipvlan_netdev_ops = {
354 .ndo_init = ipvlan_init,
355 .ndo_uninit = ipvlan_uninit,
356 .ndo_open = ipvlan_open,
357 .ndo_stop = ipvlan_stop,
358 .ndo_start_xmit = ipvlan_start_xmit,
359 .ndo_fix_features = ipvlan_fix_features,
360 .ndo_change_rx_flags = ipvlan_change_rx_flags,
361 .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
362 .ndo_get_stats64 = ipvlan_get_stats64,
363 .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
364 .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
365 .ndo_get_iflink = ipvlan_get_iflink,
368 static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
369 unsigned short type, const void *daddr,
370 const void *saddr, unsigned len)
372 const struct ipvl_dev *ipvlan = netdev_priv(dev);
373 struct net_device *phy_dev = ipvlan->phy_dev;
375 /* TODO Probably use a different field than dev_addr so that the
376 * mac-address on the virtual device is portable and can be carried
377 * while the packets use the mac-addr on the physical device.
379 return dev_hard_header(skb, phy_dev, type, daddr,
380 saddr ? : phy_dev->dev_addr, len);
383 static const struct header_ops ipvlan_header_ops = {
384 .create = ipvlan_hard_header,
385 .parse = eth_header_parse,
386 .cache = eth_header_cache,
387 .cache_update = eth_header_cache_update,
390 static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
392 ipvlan->dev->mtu = dev->mtu;
395 static bool netif_is_ipvlan(const struct net_device *dev)
397 /* both ipvlan and ipvtap devices use the same netdev_ops */
398 return dev->netdev_ops == &ipvlan_netdev_ops;
401 static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev,
402 struct ethtool_link_ksettings *cmd)
404 const struct ipvl_dev *ipvlan = netdev_priv(dev);
406 return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd);
409 static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
410 struct ethtool_drvinfo *drvinfo)
412 strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
413 strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
416 static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
418 const struct ipvl_dev *ipvlan = netdev_priv(dev);
420 return ipvlan->msg_enable;
423 static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
425 struct ipvl_dev *ipvlan = netdev_priv(dev);
427 ipvlan->msg_enable = value;
430 static const struct ethtool_ops ipvlan_ethtool_ops = {
431 .get_link = ethtool_op_get_link,
432 .get_link_ksettings = ipvlan_ethtool_get_link_ksettings,
433 .get_drvinfo = ipvlan_ethtool_get_drvinfo,
434 .get_msglevel = ipvlan_ethtool_get_msglevel,
435 .set_msglevel = ipvlan_ethtool_set_msglevel,
438 static int ipvlan_nl_changelink(struct net_device *dev,
439 struct nlattr *tb[], struct nlattr *data[],
440 struct netlink_ext_ack *extack)
442 struct ipvl_dev *ipvlan = netdev_priv(dev);
443 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
448 if (!ns_capable(dev_net(ipvlan->phy_dev)->user_ns, CAP_NET_ADMIN))
451 if (data[IFLA_IPVLAN_MODE]) {
452 u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
454 err = ipvlan_set_port_mode(port, nmode, extack);
457 if (!err && data[IFLA_IPVLAN_FLAGS]) {
458 u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]);
460 if (flags & IPVLAN_F_PRIVATE)
461 ipvlan_mark_private(port);
463 ipvlan_clear_private(port);
465 if (flags & IPVLAN_F_VEPA)
466 ipvlan_mark_vepa(port);
468 ipvlan_clear_vepa(port);
474 static size_t ipvlan_nl_getsize(const struct net_device *dev)
477 + nla_total_size(2) /* IFLA_IPVLAN_MODE */
478 + nla_total_size(2) /* IFLA_IPVLAN_FLAGS */
482 static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[],
483 struct netlink_ext_ack *extack)
488 if (data[IFLA_IPVLAN_MODE]) {
489 u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
491 if (mode >= IPVLAN_MODE_MAX)
494 if (data[IFLA_IPVLAN_FLAGS]) {
495 u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]);
497 /* Only two bits are used at this moment. */
498 if (flags & ~(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA))
500 /* Also both flags can't be active at the same time. */
501 if ((flags & (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) ==
502 (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA))
509 static int ipvlan_nl_fillinfo(struct sk_buff *skb,
510 const struct net_device *dev)
512 struct ipvl_dev *ipvlan = netdev_priv(dev);
513 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
520 if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
522 if (nla_put_u16(skb, IFLA_IPVLAN_FLAGS, port->flags))
531 int ipvlan_link_new(struct net *src_net, struct net_device *dev,
532 struct nlattr *tb[], struct nlattr *data[],
533 struct netlink_ext_ack *extack)
535 struct ipvl_dev *ipvlan = netdev_priv(dev);
536 struct ipvl_port *port;
537 struct net_device *phy_dev;
539 u16 mode = IPVLAN_MODE_L3;
544 phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
548 if (netif_is_ipvlan(phy_dev)) {
549 struct ipvl_dev *tmp = netdev_priv(phy_dev);
551 phy_dev = tmp->phy_dev;
552 if (!ns_capable(dev_net(phy_dev)->user_ns, CAP_NET_ADMIN))
554 } else if (!netif_is_ipvlan_port(phy_dev)) {
555 /* Exit early if the underlying link is invalid or busy */
556 if (phy_dev->type != ARPHRD_ETHER ||
557 phy_dev->flags & IFF_LOOPBACK) {
559 "Master is either lo or non-ether device\n");
563 if (netdev_is_rx_handler_busy(phy_dev)) {
564 netdev_err(phy_dev, "Device is already in use.\n");
569 ipvlan->phy_dev = phy_dev;
571 ipvlan->sfeatures = IPVLAN_FEATURES;
573 ipvlan_adjust_mtu(ipvlan, phy_dev);
574 INIT_LIST_HEAD(&ipvlan->addrs);
575 spin_lock_init(&ipvlan->addrs_lock);
577 /* TODO Probably put random address here to be presented to the
578 * world but keep using the physical-dev address for the outgoing
581 eth_hw_addr_set(dev, phy_dev->dev_addr);
583 dev->priv_flags |= IFF_NO_RX_HANDLER;
585 err = register_netdevice(dev);
589 /* ipvlan_init() would have created the port, if required */
590 port = ipvlan_port_get_rtnl(phy_dev);
593 /* If the port-id base is at the MAX value, then wrap it around and
594 * begin from 0x1 again. This may be due to a busy system where lots
595 * of slaves are getting created and deleted.
597 if (port->dev_id_start == 0xFFFE)
598 port->dev_id_start = 0x1;
600 /* Since L2 address is shared among all IPvlan slaves including
601 * master, use unique 16 bit dev-ids to diffentiate among them.
602 * Assign IDs between 0x1 and 0xFFFE (used by the master) to each
603 * slave link [see addrconf_ifid_eui48()].
605 err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE,
608 err = ida_simple_get(&port->ida, 0x1, port->dev_id_start,
611 goto unregister_netdev;
614 /* Increment id-base to the next slot for the future assignment */
615 port->dev_id_start = err + 1;
617 err = netdev_upper_dev_link(phy_dev, dev, extack);
621 /* Flags are per port and latest update overrides. User has
622 * to be consistent in setting it just like the mode attribute.
624 if (data && data[IFLA_IPVLAN_FLAGS])
625 port->flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]);
627 if (data && data[IFLA_IPVLAN_MODE])
628 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
630 err = ipvlan_set_port_mode(port, mode, extack);
634 list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
635 netif_stacked_transfer_operstate(phy_dev, dev);
639 netdev_upper_dev_unlink(phy_dev, dev);
641 ida_simple_remove(&port->ida, dev->dev_id);
643 unregister_netdevice(dev);
646 EXPORT_SYMBOL_GPL(ipvlan_link_new);
648 void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
650 struct ipvl_dev *ipvlan = netdev_priv(dev);
651 struct ipvl_addr *addr, *next;
653 spin_lock_bh(&ipvlan->addrs_lock);
654 list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
655 ipvlan_ht_addr_del(addr);
656 list_del_rcu(&addr->anode);
657 kfree_rcu(addr, rcu);
659 spin_unlock_bh(&ipvlan->addrs_lock);
661 ida_simple_remove(&ipvlan->port->ida, dev->dev_id);
662 list_del_rcu(&ipvlan->pnode);
663 unregister_netdevice_queue(dev, head);
664 netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
666 EXPORT_SYMBOL_GPL(ipvlan_link_delete);
668 void ipvlan_link_setup(struct net_device *dev)
672 dev->max_mtu = ETH_MAX_MTU;
673 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
674 dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE;
675 dev->netdev_ops = &ipvlan_netdev_ops;
676 dev->needs_free_netdev = true;
677 dev->header_ops = &ipvlan_header_ops;
678 dev->ethtool_ops = &ipvlan_ethtool_ops;
680 EXPORT_SYMBOL_GPL(ipvlan_link_setup);
682 static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
684 [IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
685 [IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 },
688 static struct net *ipvlan_get_link_net(const struct net_device *dev)
690 struct ipvl_dev *ipvlan = netdev_priv(dev);
692 return dev_net(ipvlan->phy_dev);
695 static struct rtnl_link_ops ipvlan_link_ops = {
697 .priv_size = sizeof(struct ipvl_dev),
699 .setup = ipvlan_link_setup,
700 .newlink = ipvlan_link_new,
701 .dellink = ipvlan_link_delete,
702 .get_link_net = ipvlan_get_link_net,
705 int ipvlan_link_register(struct rtnl_link_ops *ops)
707 ops->get_size = ipvlan_nl_getsize;
708 ops->policy = ipvlan_nl_policy;
709 ops->validate = ipvlan_nl_validate;
710 ops->fill_info = ipvlan_nl_fillinfo;
711 ops->changelink = ipvlan_nl_changelink;
712 ops->maxtype = IFLA_IPVLAN_MAX;
713 return rtnl_link_register(ops);
715 EXPORT_SYMBOL_GPL(ipvlan_link_register);
717 static int ipvlan_device_event(struct notifier_block *unused,
718 unsigned long event, void *ptr)
720 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
721 struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
722 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
723 struct ipvl_dev *ipvlan, *next;
724 struct ipvl_port *port;
728 if (!netif_is_ipvlan_port(dev))
731 port = ipvlan_port_get_rtnl(dev);
736 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
737 netif_stacked_transfer_operstate(ipvlan->phy_dev,
741 case NETDEV_REGISTER: {
742 struct net *oldnet, *newnet = dev_net(dev);
744 oldnet = read_pnet(&port->pnet);
745 if (net_eq(newnet, oldnet))
748 write_pnet(&port->pnet, newnet);
750 ipvlan_migrate_l3s_hook(oldnet, newnet);
753 case NETDEV_UNREGISTER:
754 if (dev->reg_state != NETREG_UNREGISTERING)
757 list_for_each_entry_safe(ipvlan, next, &port->ipvlans, pnode)
758 ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
760 unregister_netdevice_many(&lst_kill);
763 case NETDEV_FEAT_CHANGE:
764 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
765 netif_set_gso_max_size(ipvlan->dev, dev->gso_max_size);
766 netif_set_gso_max_segs(ipvlan->dev, dev->gso_max_segs);
767 netdev_update_features(ipvlan->dev);
771 case NETDEV_CHANGEMTU:
772 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
773 ipvlan_adjust_mtu(ipvlan, dev);
776 case NETDEV_PRE_CHANGEADDR:
777 prechaddr_info = ptr;
778 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
779 err = dev_pre_changeaddr_notify(ipvlan->dev,
780 prechaddr_info->dev_addr,
783 return notifier_from_errno(err);
787 case NETDEV_CHANGEADDR:
788 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
789 eth_hw_addr_set(ipvlan->dev, dev->dev_addr);
790 call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev);
794 case NETDEV_PRE_TYPE_CHANGE:
795 /* Forbid underlying device to change its type. */
801 /* the caller must held the addrs lock */
802 static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
804 struct ipvl_addr *addr;
806 addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
810 addr->master = ipvlan;
812 memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr));
813 addr->atype = IPVL_IPV4;
814 #if IS_ENABLED(CONFIG_IPV6)
816 memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr));
817 addr->atype = IPVL_IPV6;
821 list_add_tail_rcu(&addr->anode, &ipvlan->addrs);
823 /* If the interface is not up, the address will be added to the hash
824 * list by ipvlan_open.
826 if (netif_running(ipvlan->dev))
827 ipvlan_ht_addr_add(ipvlan, addr);
832 static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
834 struct ipvl_addr *addr;
836 spin_lock_bh(&ipvlan->addrs_lock);
837 addr = ipvlan_find_addr(ipvlan, iaddr, is_v6);
839 spin_unlock_bh(&ipvlan->addrs_lock);
843 ipvlan_ht_addr_del(addr);
844 list_del_rcu(&addr->anode);
845 spin_unlock_bh(&ipvlan->addrs_lock);
846 kfree_rcu(addr, rcu);
849 static bool ipvlan_is_valid_dev(const struct net_device *dev)
851 struct ipvl_dev *ipvlan = netdev_priv(dev);
853 if (!netif_is_ipvlan(dev))
856 if (!ipvlan || !ipvlan->port)
862 #if IS_ENABLED(CONFIG_IPV6)
863 static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
867 spin_lock_bh(&ipvlan->addrs_lock);
868 if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true))
869 netif_err(ipvlan, ifup, ipvlan->dev,
870 "Failed to add IPv6=%pI6c addr for %s intf\n",
871 ip6_addr, ipvlan->dev->name);
873 ret = ipvlan_add_addr(ipvlan, ip6_addr, true);
874 spin_unlock_bh(&ipvlan->addrs_lock);
878 static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
880 return ipvlan_del_addr(ipvlan, ip6_addr, true);
883 static int ipvlan_addr6_event(struct notifier_block *unused,
884 unsigned long event, void *ptr)
886 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
887 struct net_device *dev = (struct net_device *)if6->idev->dev;
888 struct ipvl_dev *ipvlan = netdev_priv(dev);
890 if (!ipvlan_is_valid_dev(dev))
895 if (ipvlan_add_addr6(ipvlan, &if6->addr))
900 ipvlan_del_addr6(ipvlan, &if6->addr);
907 static int ipvlan_addr6_validator_event(struct notifier_block *unused,
908 unsigned long event, void *ptr)
910 struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr;
911 struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev;
912 struct ipvl_dev *ipvlan = netdev_priv(dev);
914 if (!ipvlan_is_valid_dev(dev))
919 if (ipvlan_addr_busy(ipvlan->port, &i6vi->i6vi_addr, true)) {
920 NL_SET_ERR_MSG(i6vi->extack,
921 "Address already assigned to an ipvlan device");
922 return notifier_from_errno(-EADDRINUSE);
931 static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
935 spin_lock_bh(&ipvlan->addrs_lock);
936 if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false))
937 netif_err(ipvlan, ifup, ipvlan->dev,
938 "Failed to add IPv4=%pI4 on %s intf.\n",
939 ip4_addr, ipvlan->dev->name);
941 ret = ipvlan_add_addr(ipvlan, ip4_addr, false);
942 spin_unlock_bh(&ipvlan->addrs_lock);
946 static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
948 return ipvlan_del_addr(ipvlan, ip4_addr, false);
951 static int ipvlan_addr4_event(struct notifier_block *unused,
952 unsigned long event, void *ptr)
954 struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
955 struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
956 struct ipvl_dev *ipvlan = netdev_priv(dev);
957 struct in_addr ip4_addr;
959 if (!ipvlan_is_valid_dev(dev))
964 ip4_addr.s_addr = if4->ifa_address;
965 if (ipvlan_add_addr4(ipvlan, &ip4_addr))
970 ip4_addr.s_addr = if4->ifa_address;
971 ipvlan_del_addr4(ipvlan, &ip4_addr);
978 static int ipvlan_addr4_validator_event(struct notifier_block *unused,
979 unsigned long event, void *ptr)
981 struct in_validator_info *ivi = (struct in_validator_info *)ptr;
982 struct net_device *dev = (struct net_device *)ivi->ivi_dev->dev;
983 struct ipvl_dev *ipvlan = netdev_priv(dev);
985 if (!ipvlan_is_valid_dev(dev))
990 if (ipvlan_addr_busy(ipvlan->port, &ivi->ivi_addr, false)) {
991 NL_SET_ERR_MSG(ivi->extack,
992 "Address already assigned to an ipvlan device");
993 return notifier_from_errno(-EADDRINUSE);
1001 static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
1002 .notifier_call = ipvlan_addr4_event,
1005 static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly = {
1006 .notifier_call = ipvlan_addr4_validator_event,
1009 static struct notifier_block ipvlan_notifier_block __read_mostly = {
1010 .notifier_call = ipvlan_device_event,
1013 #if IS_ENABLED(CONFIG_IPV6)
1014 static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
1015 .notifier_call = ipvlan_addr6_event,
1018 static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = {
1019 .notifier_call = ipvlan_addr6_validator_event,
1023 static int __init ipvlan_init_module(void)
1027 ipvlan_init_secret();
1028 register_netdevice_notifier(&ipvlan_notifier_block);
1029 #if IS_ENABLED(CONFIG_IPV6)
1030 register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
1031 register_inet6addr_validator_notifier(
1032 &ipvlan_addr6_vtor_notifier_block);
1034 register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
1035 register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block);
1037 err = ipvlan_l3s_init();
1041 err = ipvlan_link_register(&ipvlan_link_ops);
1043 ipvlan_l3s_cleanup();
1049 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
1050 unregister_inetaddr_validator_notifier(
1051 &ipvlan_addr4_vtor_notifier_block);
1052 #if IS_ENABLED(CONFIG_IPV6)
1053 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
1054 unregister_inet6addr_validator_notifier(
1055 &ipvlan_addr6_vtor_notifier_block);
1057 unregister_netdevice_notifier(&ipvlan_notifier_block);
1061 static void __exit ipvlan_cleanup_module(void)
1063 rtnl_link_unregister(&ipvlan_link_ops);
1064 ipvlan_l3s_cleanup();
1065 unregister_netdevice_notifier(&ipvlan_notifier_block);
1066 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
1067 unregister_inetaddr_validator_notifier(
1068 &ipvlan_addr4_vtor_notifier_block);
1069 #if IS_ENABLED(CONFIG_IPV6)
1070 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
1071 unregister_inet6addr_validator_notifier(
1072 &ipvlan_addr6_vtor_notifier_block);
1076 module_init(ipvlan_init_module);
1077 module_exit(ipvlan_cleanup_module);
1079 MODULE_LICENSE("GPL");
1080 MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
1081 MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
1082 MODULE_ALIAS_RTNL_LINK("ipvlan");