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10#include "ipvlan.h"
11
12void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
13{
14 ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj;
15}
16
17void ipvlan_set_port_mode(struct ipvl_port *port, u32 nval)
18{
19 struct ipvl_dev *ipvlan;
20
21 if (port->mode != nval) {
22 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
23 if (nval == IPVLAN_MODE_L3)
24 ipvlan->dev->flags |= IFF_NOARP;
25 else
26 ipvlan->dev->flags &= ~IFF_NOARP;
27 }
28 port->mode = nval;
29 }
30}
31
32static int ipvlan_port_create(struct net_device *dev)
33{
34 struct ipvl_port *port;
35 int err, idx;
36
37 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) {
38 netdev_err(dev, "Master is either lo or non-ether device\n");
39 return -EINVAL;
40 }
41
42 if (netif_is_macvlan_port(dev)) {
43 netdev_err(dev, "Master is a macvlan port.\n");
44 return -EBUSY;
45 }
46
47 port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL);
48 if (!port)
49 return -ENOMEM;
50
51 port->dev = dev;
52 port->mode = IPVLAN_MODE_L3;
53 INIT_LIST_HEAD(&port->ipvlans);
54 for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++)
55 INIT_HLIST_HEAD(&port->hlhead[idx]);
56
57 skb_queue_head_init(&port->backlog);
58 INIT_WORK(&port->wq, ipvlan_process_multicast);
59
60 err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
61 if (err)
62 goto err;
63
64 dev->priv_flags |= IFF_IPVLAN_MASTER;
65 return 0;
66
67err:
68 kfree_rcu(port, rcu);
69 return err;
70}
71
72static void ipvlan_port_destroy(struct net_device *dev)
73{
74 struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
75
76 dev->priv_flags &= ~IFF_IPVLAN_MASTER;
77 netdev_rx_handler_unregister(dev);
78 cancel_work_sync(&port->wq);
79 __skb_queue_purge(&port->backlog);
80 kfree_rcu(port, rcu);
81}
82
83
84
85
86
87static struct lock_class_key ipvlan_netdev_xmit_lock_key;
88static struct lock_class_key ipvlan_netdev_addr_lock_key;
89
90#define IPVLAN_FEATURES \
91 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
92 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
93 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
94 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
95
96#define IPVLAN_STATE_MASK \
97 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
98
99static void ipvlan_set_lockdep_class_one(struct net_device *dev,
100 struct netdev_queue *txq,
101 void *_unused)
102{
103 lockdep_set_class(&txq->_xmit_lock, &ipvlan_netdev_xmit_lock_key);
104}
105
106static void ipvlan_set_lockdep_class(struct net_device *dev)
107{
108 lockdep_set_class(&dev->addr_list_lock, &ipvlan_netdev_addr_lock_key);
109 netdev_for_each_tx_queue(dev, ipvlan_set_lockdep_class_one, NULL);
110}
111
112static int ipvlan_init(struct net_device *dev)
113{
114 struct ipvl_dev *ipvlan = netdev_priv(dev);
115 const struct net_device *phy_dev = ipvlan->phy_dev;
116
117 dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
118 (phy_dev->state & IPVLAN_STATE_MASK);
119 dev->features = phy_dev->features & IPVLAN_FEATURES;
120 dev->features |= NETIF_F_LLTX;
121 dev->gso_max_size = phy_dev->gso_max_size;
122 dev->hard_header_len = phy_dev->hard_header_len;
123
124 ipvlan_set_lockdep_class(dev);
125
126 ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats);
127 if (!ipvlan->pcpu_stats)
128 return -ENOMEM;
129
130 return 0;
131}
132
133static void ipvlan_uninit(struct net_device *dev)
134{
135 struct ipvl_dev *ipvlan = netdev_priv(dev);
136 struct ipvl_port *port = ipvlan->port;
137
138 free_percpu(ipvlan->pcpu_stats);
139
140 port->count -= 1;
141 if (!port->count)
142 ipvlan_port_destroy(port->dev);
143}
144
145static int ipvlan_open(struct net_device *dev)
146{
147 struct ipvl_dev *ipvlan = netdev_priv(dev);
148 struct net_device *phy_dev = ipvlan->phy_dev;
149 struct ipvl_addr *addr;
150
151 if (ipvlan->port->mode == IPVLAN_MODE_L3)
152 dev->flags |= IFF_NOARP;
153 else
154 dev->flags &= ~IFF_NOARP;
155
156 list_for_each_entry(addr, &ipvlan->addrs, anode)
157 ipvlan_ht_addr_add(ipvlan, addr);
158
159 return dev_uc_add(phy_dev, phy_dev->dev_addr);
160}
161
162static int ipvlan_stop(struct net_device *dev)
163{
164 struct ipvl_dev *ipvlan = netdev_priv(dev);
165 struct net_device *phy_dev = ipvlan->phy_dev;
166 struct ipvl_addr *addr;
167
168 dev_uc_unsync(phy_dev, dev);
169 dev_mc_unsync(phy_dev, dev);
170
171 dev_uc_del(phy_dev, phy_dev->dev_addr);
172
173 list_for_each_entry(addr, &ipvlan->addrs, anode)
174 ipvlan_ht_addr_del(addr);
175
176 return 0;
177}
178
179static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
180 struct net_device *dev)
181{
182 const struct ipvl_dev *ipvlan = netdev_priv(dev);
183 int skblen = skb->len;
184 int ret;
185
186 ret = ipvlan_queue_xmit(skb, dev);
187 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
188 struct ipvl_pcpu_stats *pcptr;
189
190 pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
191
192 u64_stats_update_begin(&pcptr->syncp);
193 pcptr->tx_pkts++;
194 pcptr->tx_bytes += skblen;
195 u64_stats_update_end(&pcptr->syncp);
196 } else {
197 this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
198 }
199 return ret;
200}
201
202static netdev_features_t ipvlan_fix_features(struct net_device *dev,
203 netdev_features_t features)
204{
205 struct ipvl_dev *ipvlan = netdev_priv(dev);
206
207 return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
208}
209
210static void ipvlan_change_rx_flags(struct net_device *dev, int change)
211{
212 struct ipvl_dev *ipvlan = netdev_priv(dev);
213 struct net_device *phy_dev = ipvlan->phy_dev;
214
215 if (change & IFF_ALLMULTI)
216 dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
217}
218
219static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
220{
221 struct ipvl_dev *ipvlan = netdev_priv(dev);
222
223 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
224 bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
225 } else {
226 struct netdev_hw_addr *ha;
227 DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
228
229 bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
230 netdev_for_each_mc_addr(ha, dev)
231 __set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
232
233
234
235
236
237 __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters);
238
239 bitmap_copy(ipvlan->mac_filters, mc_filters,
240 IPVLAN_MAC_FILTER_SIZE);
241 }
242 dev_uc_sync(ipvlan->phy_dev, dev);
243 dev_mc_sync(ipvlan->phy_dev, dev);
244}
245
246static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev,
247 struct rtnl_link_stats64 *s)
248{
249 struct ipvl_dev *ipvlan = netdev_priv(dev);
250
251 if (ipvlan->pcpu_stats) {
252 struct ipvl_pcpu_stats *pcptr;
253 u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
254 u32 rx_errs = 0, tx_drps = 0;
255 u32 strt;
256 int idx;
257
258 for_each_possible_cpu(idx) {
259 pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
260 do {
261 strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
262 rx_pkts = pcptr->rx_pkts;
263 rx_bytes = pcptr->rx_bytes;
264 rx_mcast = pcptr->rx_mcast;
265 tx_pkts = pcptr->tx_pkts;
266 tx_bytes = pcptr->tx_bytes;
267 } while (u64_stats_fetch_retry_irq(&pcptr->syncp,
268 strt));
269
270 s->rx_packets += rx_pkts;
271 s->rx_bytes += rx_bytes;
272 s->multicast += rx_mcast;
273 s->tx_packets += tx_pkts;
274 s->tx_bytes += tx_bytes;
275
276
277 rx_errs += pcptr->rx_errs;
278 tx_drps += pcptr->tx_drps;
279 }
280 s->rx_errors = rx_errs;
281 s->rx_dropped = rx_errs;
282 s->tx_dropped = tx_drps;
283 }
284 return s;
285}
286
287static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
288{
289 struct ipvl_dev *ipvlan = netdev_priv(dev);
290 struct net_device *phy_dev = ipvlan->phy_dev;
291
292 return vlan_vid_add(phy_dev, proto, vid);
293}
294
295static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
296 u16 vid)
297{
298 struct ipvl_dev *ipvlan = netdev_priv(dev);
299 struct net_device *phy_dev = ipvlan->phy_dev;
300
301 vlan_vid_del(phy_dev, proto, vid);
302 return 0;
303}
304
305static int ipvlan_get_iflink(const struct net_device *dev)
306{
307 struct ipvl_dev *ipvlan = netdev_priv(dev);
308
309 return ipvlan->phy_dev->ifindex;
310}
311
312static const struct net_device_ops ipvlan_netdev_ops = {
313 .ndo_init = ipvlan_init,
314 .ndo_uninit = ipvlan_uninit,
315 .ndo_open = ipvlan_open,
316 .ndo_stop = ipvlan_stop,
317 .ndo_start_xmit = ipvlan_start_xmit,
318 .ndo_fix_features = ipvlan_fix_features,
319 .ndo_change_rx_flags = ipvlan_change_rx_flags,
320 .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
321 .ndo_get_stats64 = ipvlan_get_stats64,
322 .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
323 .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
324 .ndo_get_iflink = ipvlan_get_iflink,
325};
326
327static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
328 unsigned short type, const void *daddr,
329 const void *saddr, unsigned len)
330{
331 const struct ipvl_dev *ipvlan = netdev_priv(dev);
332 struct net_device *phy_dev = ipvlan->phy_dev;
333
334
335
336
337
338 return dev_hard_header(skb, phy_dev, type, daddr,
339 saddr ? : dev->dev_addr, len);
340}
341
342static const struct header_ops ipvlan_header_ops = {
343 .create = ipvlan_hard_header,
344 .parse = eth_header_parse,
345 .cache = eth_header_cache,
346 .cache_update = eth_header_cache_update,
347};
348
349static int ipvlan_ethtool_get_settings(struct net_device *dev,
350 struct ethtool_cmd *cmd)
351{
352 const struct ipvl_dev *ipvlan = netdev_priv(dev);
353
354 return __ethtool_get_settings(ipvlan->phy_dev, cmd);
355}
356
357static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
358 struct ethtool_drvinfo *drvinfo)
359{
360 strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
361 strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
362}
363
364static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
365{
366 const struct ipvl_dev *ipvlan = netdev_priv(dev);
367
368 return ipvlan->msg_enable;
369}
370
371static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
372{
373 struct ipvl_dev *ipvlan = netdev_priv(dev);
374
375 ipvlan->msg_enable = value;
376}
377
378static const struct ethtool_ops ipvlan_ethtool_ops = {
379 .get_link = ethtool_op_get_link,
380 .get_settings = ipvlan_ethtool_get_settings,
381 .get_drvinfo = ipvlan_ethtool_get_drvinfo,
382 .get_msglevel = ipvlan_ethtool_get_msglevel,
383 .set_msglevel = ipvlan_ethtool_set_msglevel,
384};
385
386static int ipvlan_nl_changelink(struct net_device *dev,
387 struct nlattr *tb[], struct nlattr *data[])
388{
389 struct ipvl_dev *ipvlan = netdev_priv(dev);
390 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
391
392 if (data && data[IFLA_IPVLAN_MODE]) {
393 u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
394
395 ipvlan_set_port_mode(port, nmode);
396 }
397 return 0;
398}
399
400static size_t ipvlan_nl_getsize(const struct net_device *dev)
401{
402 return (0
403 + nla_total_size(2)
404 );
405}
406
407static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[])
408{
409 if (data && data[IFLA_IPVLAN_MODE]) {
410 u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
411
412 if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX)
413 return -EINVAL;
414 }
415 return 0;
416}
417
418static int ipvlan_nl_fillinfo(struct sk_buff *skb,
419 const struct net_device *dev)
420{
421 struct ipvl_dev *ipvlan = netdev_priv(dev);
422 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
423 int ret = -EINVAL;
424
425 if (!port)
426 goto err;
427
428 ret = -EMSGSIZE;
429 if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
430 goto err;
431
432 return 0;
433
434err:
435 return ret;
436}
437
438static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
439 struct nlattr *tb[], struct nlattr *data[])
440{
441 struct ipvl_dev *ipvlan = netdev_priv(dev);
442 struct ipvl_port *port;
443 struct net_device *phy_dev;
444 int err;
445
446 if (!tb[IFLA_LINK])
447 return -EINVAL;
448
449 phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
450 if (!phy_dev)
451 return -ENODEV;
452
453 if (netif_is_ipvlan(phy_dev)) {
454 struct ipvl_dev *tmp = netdev_priv(phy_dev);
455
456 phy_dev = tmp->phy_dev;
457 } else if (!netif_is_ipvlan_port(phy_dev)) {
458 err = ipvlan_port_create(phy_dev);
459 if (err < 0)
460 return err;
461 }
462
463 port = ipvlan_port_get_rtnl(phy_dev);
464 if (data && data[IFLA_IPVLAN_MODE])
465 port->mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
466
467 ipvlan->phy_dev = phy_dev;
468 ipvlan->dev = dev;
469 ipvlan->port = port;
470 ipvlan->sfeatures = IPVLAN_FEATURES;
471 INIT_LIST_HEAD(&ipvlan->addrs);
472
473
474
475
476
477 memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
478
479 dev->priv_flags |= IFF_IPVLAN_SLAVE;
480
481 port->count += 1;
482 err = register_netdevice(dev);
483 if (err < 0)
484 goto ipvlan_destroy_port;
485
486 err = netdev_upper_dev_link(phy_dev, dev);
487 if (err)
488 goto ipvlan_destroy_port;
489
490 list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
491 netif_stacked_transfer_operstate(phy_dev, dev);
492 return 0;
493
494ipvlan_destroy_port:
495 port->count -= 1;
496 if (!port->count)
497 ipvlan_port_destroy(phy_dev);
498
499 return err;
500}
501
502static void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
503{
504 struct ipvl_dev *ipvlan = netdev_priv(dev);
505 struct ipvl_addr *addr, *next;
506
507 list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
508 ipvlan_ht_addr_del(addr);
509 list_del(&addr->anode);
510 kfree_rcu(addr, rcu);
511 }
512
513 list_del_rcu(&ipvlan->pnode);
514 unregister_netdevice_queue(dev, head);
515 netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
516}
517
518static void ipvlan_link_setup(struct net_device *dev)
519{
520 ether_setup(dev);
521
522 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
523 dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE;
524 dev->netdev_ops = &ipvlan_netdev_ops;
525 dev->destructor = free_netdev;
526 dev->header_ops = &ipvlan_header_ops;
527 dev->ethtool_ops = &ipvlan_ethtool_ops;
528}
529
530static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
531{
532 [IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
533};
534
535static struct rtnl_link_ops ipvlan_link_ops = {
536 .kind = "ipvlan",
537 .priv_size = sizeof(struct ipvl_dev),
538
539 .get_size = ipvlan_nl_getsize,
540 .policy = ipvlan_nl_policy,
541 .validate = ipvlan_nl_validate,
542 .fill_info = ipvlan_nl_fillinfo,
543 .changelink = ipvlan_nl_changelink,
544 .maxtype = IFLA_IPVLAN_MAX,
545
546 .setup = ipvlan_link_setup,
547 .newlink = ipvlan_link_new,
548 .dellink = ipvlan_link_delete,
549};
550
551static int ipvlan_link_register(struct rtnl_link_ops *ops)
552{
553 return rtnl_link_register(ops);
554}
555
556static int ipvlan_device_event(struct notifier_block *unused,
557 unsigned long event, void *ptr)
558{
559 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
560 struct ipvl_dev *ipvlan, *next;
561 struct ipvl_port *port;
562 LIST_HEAD(lst_kill);
563
564 if (!netif_is_ipvlan_port(dev))
565 return NOTIFY_DONE;
566
567 port = ipvlan_port_get_rtnl(dev);
568
569 switch (event) {
570 case NETDEV_CHANGE:
571 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
572 netif_stacked_transfer_operstate(ipvlan->phy_dev,
573 ipvlan->dev);
574 break;
575
576 case NETDEV_UNREGISTER:
577 if (dev->reg_state != NETREG_UNREGISTERING)
578 break;
579
580 list_for_each_entry_safe(ipvlan, next, &port->ipvlans,
581 pnode)
582 ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
583 &lst_kill);
584 unregister_netdevice_many(&lst_kill);
585 break;
586
587 case NETDEV_FEAT_CHANGE:
588 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
589 ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
590 ipvlan->dev->gso_max_size = dev->gso_max_size;
591 netdev_features_change(ipvlan->dev);
592 }
593 break;
594
595 case NETDEV_CHANGEMTU:
596 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
597 ipvlan_adjust_mtu(ipvlan, dev);
598 break;
599
600 case NETDEV_PRE_TYPE_CHANGE:
601
602 return NOTIFY_BAD;
603 }
604 return NOTIFY_DONE;
605}
606
607static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
608{
609 struct ipvl_addr *addr;
610
611 if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
612 netif_err(ipvlan, ifup, ipvlan->dev,
613 "Failed to add IPv6=%pI6c addr for %s intf\n",
614 ip6_addr, ipvlan->dev->name);
615 return -EINVAL;
616 }
617 addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
618 if (!addr)
619 return -ENOMEM;
620
621 addr->master = ipvlan;
622 memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr));
623 addr->atype = IPVL_IPV6;
624 list_add_tail(&addr->anode, &ipvlan->addrs);
625
626
627
628
629 if (netif_running(ipvlan->dev))
630 ipvlan_ht_addr_add(ipvlan, addr);
631
632 return 0;
633}
634
635static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
636{
637 struct ipvl_addr *addr;
638
639 addr = ipvlan_find_addr(ipvlan, ip6_addr, true);
640 if (!addr)
641 return;
642
643 ipvlan_ht_addr_del(addr);
644 list_del(&addr->anode);
645 kfree_rcu(addr, rcu);
646
647 return;
648}
649
650static int ipvlan_addr6_event(struct notifier_block *unused,
651 unsigned long event, void *ptr)
652{
653 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
654 struct net_device *dev = (struct net_device *)if6->idev->dev;
655 struct ipvl_dev *ipvlan = netdev_priv(dev);
656
657
658 if (in_softirq())
659 return NOTIFY_DONE;
660
661 if (!netif_is_ipvlan(dev))
662 return NOTIFY_DONE;
663
664 if (!ipvlan || !ipvlan->port)
665 return NOTIFY_DONE;
666
667 switch (event) {
668 case NETDEV_UP:
669 if (ipvlan_add_addr6(ipvlan, &if6->addr))
670 return NOTIFY_BAD;
671 break;
672
673 case NETDEV_DOWN:
674 ipvlan_del_addr6(ipvlan, &if6->addr);
675 break;
676 }
677
678 return NOTIFY_OK;
679}
680
681static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
682{
683 struct ipvl_addr *addr;
684
685 if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) {
686 netif_err(ipvlan, ifup, ipvlan->dev,
687 "Failed to add IPv4=%pI4 on %s intf.\n",
688 ip4_addr, ipvlan->dev->name);
689 return -EINVAL;
690 }
691 addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL);
692 if (!addr)
693 return -ENOMEM;
694
695 addr->master = ipvlan;
696 memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr));
697 addr->atype = IPVL_IPV4;
698 list_add_tail(&addr->anode, &ipvlan->addrs);
699
700
701
702
703 if (netif_running(ipvlan->dev))
704 ipvlan_ht_addr_add(ipvlan, addr);
705
706 return 0;
707}
708
709static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
710{
711 struct ipvl_addr *addr;
712
713 addr = ipvlan_find_addr(ipvlan, ip4_addr, false);
714 if (!addr)
715 return;
716
717 ipvlan_ht_addr_del(addr);
718 list_del(&addr->anode);
719 kfree_rcu(addr, rcu);
720
721 return;
722}
723
724static int ipvlan_addr4_event(struct notifier_block *unused,
725 unsigned long event, void *ptr)
726{
727 struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
728 struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
729 struct ipvl_dev *ipvlan = netdev_priv(dev);
730 struct in_addr ip4_addr;
731
732 if (!netif_is_ipvlan(dev))
733 return NOTIFY_DONE;
734
735 if (!ipvlan || !ipvlan->port)
736 return NOTIFY_DONE;
737
738 switch (event) {
739 case NETDEV_UP:
740 ip4_addr.s_addr = if4->ifa_address;
741 if (ipvlan_add_addr4(ipvlan, &ip4_addr))
742 return NOTIFY_BAD;
743 break;
744
745 case NETDEV_DOWN:
746 ip4_addr.s_addr = if4->ifa_address;
747 ipvlan_del_addr4(ipvlan, &ip4_addr);
748 break;
749 }
750
751 return NOTIFY_OK;
752}
753
754static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
755 .notifier_call = ipvlan_addr4_event,
756};
757
758static struct notifier_block ipvlan_notifier_block __read_mostly = {
759 .notifier_call = ipvlan_device_event,
760};
761
762static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
763 .notifier_call = ipvlan_addr6_event,
764};
765
766static int __init ipvlan_init_module(void)
767{
768 int err;
769
770 ipvlan_init_secret();
771 register_netdevice_notifier(&ipvlan_notifier_block);
772 register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
773 register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
774
775 err = ipvlan_link_register(&ipvlan_link_ops);
776 if (err < 0)
777 goto error;
778
779 return 0;
780error:
781 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
782 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
783 unregister_netdevice_notifier(&ipvlan_notifier_block);
784 return err;
785}
786
787static void __exit ipvlan_cleanup_module(void)
788{
789 rtnl_link_unregister(&ipvlan_link_ops);
790 unregister_netdevice_notifier(&ipvlan_notifier_block);
791 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
792 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
793}
794
795module_init(ipvlan_init_module);
796module_exit(ipvlan_cleanup_module);
797
798MODULE_LICENSE("GPL");
799MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
800MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
801MODULE_ALIAS_RTNL_LINK("ipvlan");
802
