1
2
3
4
5#include "ipvlan.h"
6
7static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval,
8 struct netlink_ext_ack *extack)
9{
10 struct ipvl_dev *ipvlan;
11 unsigned int flags;
12 int err;
13
14 ASSERT_RTNL();
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,
20 flags | IFF_NOARP,
21 extack);
22 } else {
23 err = dev_change_flags(ipvlan->dev,
24 flags & ~IFF_NOARP,
25 extack);
26 }
27 if (unlikely(err))
28 goto fail;
29 }
30 if (nval == IPVLAN_MODE_L3S) {
31
32 err = ipvlan_l3s_register(port);
33 if (err)
34 goto fail;
35 } else if (port->mode == IPVLAN_MODE_L3S) {
36
37 ipvlan_l3s_unregister(port);
38 }
39 port->mode = nval;
40 }
41 return 0;
42
43fail:
44
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,
50 NULL);
51 else
52 dev_change_flags(ipvlan->dev, flags & ~IFF_NOARP,
53 NULL);
54 }
55
56 return err;
57}
58
59static int ipvlan_port_create(struct net_device *dev)
60{
61 struct ipvl_port *port;
62 int err, idx;
63
64 port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL);
65 if (!port)
66 return -ENOMEM;
67
68 write_pnet(&port->pnet, dev_net(dev));
69 port->dev = 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]);
74
75 skb_queue_head_init(&port->backlog);
76 INIT_WORK(&port->wq, ipvlan_process_multicast);
77 ida_init(&port->ida);
78 port->dev_id_start = 1;
79
80 err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
81 if (err)
82 goto err;
83
84 return 0;
85
86err:
87 kfree(port);
88 return err;
89}
90
91static void ipvlan_port_destroy(struct net_device *dev)
92{
93 struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
94 struct sk_buff *skb;
95
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) {
101 if (skb->dev)
102 dev_put(skb->dev);
103 kfree_skb(skb);
104 }
105 ida_destroy(&port->ida);
106 kfree(port);
107}
108
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)
114
115#define IPVLAN_STATE_MASK \
116 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
117
118static int ipvlan_init(struct net_device *dev)
119{
120 struct ipvl_dev *ipvlan = netdev_priv(dev);
121 struct net_device *phy_dev = ipvlan->phy_dev;
122 struct ipvl_port *port;
123 int err;
124
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;
133
134 netdev_lockdep_set_classes(dev);
135
136 ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats);
137 if (!ipvlan->pcpu_stats)
138 return -ENOMEM;
139
140 if (!netif_is_ipvlan_port(phy_dev)) {
141 err = ipvlan_port_create(phy_dev);
142 if (err < 0) {
143 free_percpu(ipvlan->pcpu_stats);
144 return err;
145 }
146 }
147 port = ipvlan_port_get_rtnl(phy_dev);
148 port->count += 1;
149 return 0;
150}
151
152static void ipvlan_uninit(struct net_device *dev)
153{
154 struct ipvl_dev *ipvlan = netdev_priv(dev);
155 struct net_device *phy_dev = ipvlan->phy_dev;
156 struct ipvl_port *port;
157
158 free_percpu(ipvlan->pcpu_stats);
159
160 port = ipvlan_port_get_rtnl(phy_dev);
161 port->count -= 1;
162 if (!port->count)
163 ipvlan_port_destroy(port->dev);
164}
165
166static int ipvlan_open(struct net_device *dev)
167{
168 struct ipvl_dev *ipvlan = netdev_priv(dev);
169 struct ipvl_addr *addr;
170
171 if (ipvlan->port->mode == IPVLAN_MODE_L3 ||
172 ipvlan->port->mode == IPVLAN_MODE_L3S)
173 dev->flags |= IFF_NOARP;
174 else
175 dev->flags &= ~IFF_NOARP;
176
177 rcu_read_lock();
178 list_for_each_entry_rcu(addr, &ipvlan->addrs, anode)
179 ipvlan_ht_addr_add(ipvlan, addr);
180 rcu_read_unlock();
181
182 return 0;
183}
184
185static int ipvlan_stop(struct net_device *dev)
186{
187 struct ipvl_dev *ipvlan = netdev_priv(dev);
188 struct net_device *phy_dev = ipvlan->phy_dev;
189 struct ipvl_addr *addr;
190
191 dev_uc_unsync(phy_dev, dev);
192 dev_mc_unsync(phy_dev, dev);
193
194 rcu_read_lock();
195 list_for_each_entry_rcu(addr, &ipvlan->addrs, anode)
196 ipvlan_ht_addr_del(addr);
197 rcu_read_unlock();
198
199 return 0;
200}
201
202static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
203 struct net_device *dev)
204{
205 const struct ipvl_dev *ipvlan = netdev_priv(dev);
206 int skblen = skb->len;
207 int ret;
208
209 ret = ipvlan_queue_xmit(skb, dev);
210 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
211 struct ipvl_pcpu_stats *pcptr;
212
213 pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
214
215 u64_stats_update_begin(&pcptr->syncp);
216 pcptr->tx_pkts++;
217 pcptr->tx_bytes += skblen;
218 u64_stats_update_end(&pcptr->syncp);
219 } else {
220 this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
221 }
222 return ret;
223}
224
225static netdev_features_t ipvlan_fix_features(struct net_device *dev,
226 netdev_features_t features)
227{
228 struct ipvl_dev *ipvlan = netdev_priv(dev);
229
230 return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
231}
232
233static void ipvlan_change_rx_flags(struct net_device *dev, int change)
234{
235 struct ipvl_dev *ipvlan = netdev_priv(dev);
236 struct net_device *phy_dev = ipvlan->phy_dev;
237
238 if (change & IFF_ALLMULTI)
239 dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
240}
241
242static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
243{
244 struct ipvl_dev *ipvlan = netdev_priv(dev);
245
246 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
247 bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
248 } else {
249 struct netdev_hw_addr *ha;
250 DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
251
252 bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
253 netdev_for_each_mc_addr(ha, dev)
254 __set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
255
256
257
258
259
260 __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters);
261
262 bitmap_copy(ipvlan->mac_filters, mc_filters,
263 IPVLAN_MAC_FILTER_SIZE);
264 }
265 dev_uc_sync(ipvlan->phy_dev, dev);
266 dev_mc_sync(ipvlan->phy_dev, dev);
267}
268
269static void ipvlan_get_stats64(struct net_device *dev,
270 struct rtnl_link_stats64 *s)
271{
272 struct ipvl_dev *ipvlan = netdev_priv(dev);
273
274 if (ipvlan->pcpu_stats) {
275 struct ipvl_pcpu_stats *pcptr;
276 u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
277 u32 rx_errs = 0, tx_drps = 0;
278 u32 strt;
279 int idx;
280
281 for_each_possible_cpu(idx) {
282 pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
283 do {
284 strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
285 rx_pkts = pcptr->rx_pkts;
286 rx_bytes = pcptr->rx_bytes;
287 rx_mcast = pcptr->rx_mcast;
288 tx_pkts = pcptr->tx_pkts;
289 tx_bytes = pcptr->tx_bytes;
290 } while (u64_stats_fetch_retry_irq(&pcptr->syncp,
291 strt));
292
293 s->rx_packets += rx_pkts;
294 s->rx_bytes += rx_bytes;
295 s->multicast += rx_mcast;
296 s->tx_packets += tx_pkts;
297 s->tx_bytes += tx_bytes;
298
299
300 rx_errs += pcptr->rx_errs;
301 tx_drps += pcptr->tx_drps;
302 }
303 s->rx_errors = rx_errs;
304 s->rx_dropped = rx_errs;
305 s->tx_dropped = tx_drps;
306 }
307}
308
309static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
310{
311 struct ipvl_dev *ipvlan = netdev_priv(dev);
312 struct net_device *phy_dev = ipvlan->phy_dev;
313
314 return vlan_vid_add(phy_dev, proto, vid);
315}
316
317static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
318 u16 vid)
319{
320 struct ipvl_dev *ipvlan = netdev_priv(dev);
321 struct net_device *phy_dev = ipvlan->phy_dev;
322
323 vlan_vid_del(phy_dev, proto, vid);
324 return 0;
325}
326
327static int ipvlan_get_iflink(const struct net_device *dev)
328{
329 struct ipvl_dev *ipvlan = netdev_priv(dev);
330
331 return ipvlan->phy_dev->ifindex;
332}
333
334static const struct net_device_ops ipvlan_netdev_ops = {
335 .ndo_init = ipvlan_init,
336 .ndo_uninit = ipvlan_uninit,
337 .ndo_open = ipvlan_open,
338 .ndo_stop = ipvlan_stop,
339 .ndo_start_xmit = ipvlan_start_xmit,
340 .ndo_fix_features = ipvlan_fix_features,
341 .ndo_change_rx_flags = ipvlan_change_rx_flags,
342 .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
343 .ndo_get_stats64 = ipvlan_get_stats64,
344 .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
345 .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
346 .ndo_get_iflink = ipvlan_get_iflink,
347};
348
349static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
350 unsigned short type, const void *daddr,
351 const void *saddr, unsigned len)
352{
353 const struct ipvl_dev *ipvlan = netdev_priv(dev);
354 struct net_device *phy_dev = ipvlan->phy_dev;
355
356
357
358
359
360 return dev_hard_header(skb, phy_dev, type, daddr,
361 saddr ? : phy_dev->dev_addr, len);
362}
363
364static const struct header_ops ipvlan_header_ops = {
365 .create = ipvlan_hard_header,
366 .parse = eth_header_parse,
367 .cache = eth_header_cache,
368 .cache_update = eth_header_cache_update,
369};
370
371static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
372{
373 ipvlan->dev->mtu = dev->mtu;
374}
375
376static bool netif_is_ipvlan(const struct net_device *dev)
377{
378
379 return dev->netdev_ops == &ipvlan_netdev_ops;
380}
381
382static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev,
383 struct ethtool_link_ksettings *cmd)
384{
385 const struct ipvl_dev *ipvlan = netdev_priv(dev);
386
387 return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd);
388}
389
390static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
391 struct ethtool_drvinfo *drvinfo)
392{
393 strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
394 strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
395}
396
397static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
398{
399 const struct ipvl_dev *ipvlan = netdev_priv(dev);
400
401 return ipvlan->msg_enable;
402}
403
404static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
405{
406 struct ipvl_dev *ipvlan = netdev_priv(dev);
407
408 ipvlan->msg_enable = value;
409}
410
411static const struct ethtool_ops ipvlan_ethtool_ops = {
412 .get_link = ethtool_op_get_link,
413 .get_link_ksettings = ipvlan_ethtool_get_link_ksettings,
414 .get_drvinfo = ipvlan_ethtool_get_drvinfo,
415 .get_msglevel = ipvlan_ethtool_get_msglevel,
416 .set_msglevel = ipvlan_ethtool_set_msglevel,
417};
418
419static int ipvlan_nl_changelink(struct net_device *dev,
420 struct nlattr *tb[], struct nlattr *data[],
421 struct netlink_ext_ack *extack)
422{
423 struct ipvl_dev *ipvlan = netdev_priv(dev);
424 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
425 int err = 0;
426
427 if (!data)
428 return 0;
429 if (!ns_capable(dev_net(ipvlan->phy_dev)->user_ns, CAP_NET_ADMIN))
430 return -EPERM;
431
432 if (data[IFLA_IPVLAN_MODE]) {
433 u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
434
435 err = ipvlan_set_port_mode(port, nmode, extack);
436 }
437
438 if (!err && data[IFLA_IPVLAN_FLAGS]) {
439 u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]);
440
441 if (flags & IPVLAN_F_PRIVATE)
442 ipvlan_mark_private(port);
443 else
444 ipvlan_clear_private(port);
445
446 if (flags & IPVLAN_F_VEPA)
447 ipvlan_mark_vepa(port);
448 else
449 ipvlan_clear_vepa(port);
450 }
451
452 return err;
453}
454
455static size_t ipvlan_nl_getsize(const struct net_device *dev)
456{
457 return (0
458 + nla_total_size(2)
459 + nla_total_size(2)
460 );
461}
462
463static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[],
464 struct netlink_ext_ack *extack)
465{
466 if (!data)
467 return 0;
468
469 if (data[IFLA_IPVLAN_MODE]) {
470 u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
471
472 if (mode >= IPVLAN_MODE_MAX)
473 return -EINVAL;
474 }
475 if (data[IFLA_IPVLAN_FLAGS]) {
476 u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]);
477
478
479 if (flags & ~(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA))
480 return -EINVAL;
481
482 if ((flags & (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) ==
483 (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA))
484 return -EINVAL;
485 }
486
487 return 0;
488}
489
490static int ipvlan_nl_fillinfo(struct sk_buff *skb,
491 const struct net_device *dev)
492{
493 struct ipvl_dev *ipvlan = netdev_priv(dev);
494 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
495 int ret = -EINVAL;
496
497 if (!port)
498 goto err;
499
500 ret = -EMSGSIZE;
501 if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
502 goto err;
503 if (nla_put_u16(skb, IFLA_IPVLAN_FLAGS, port->flags))
504 goto err;
505
506 return 0;
507
508err:
509 return ret;
510}
511
512int ipvlan_link_new(struct net *src_net, struct net_device *dev,
513 struct nlattr *tb[], struct nlattr *data[],
514 struct netlink_ext_ack *extack)
515{
516 struct ipvl_dev *ipvlan = netdev_priv(dev);
517 struct ipvl_port *port;
518 struct net_device *phy_dev;
519 int err;
520 u16 mode = IPVLAN_MODE_L3;
521
522 if (!tb[IFLA_LINK])
523 return -EINVAL;
524
525 phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
526 if (!phy_dev)
527 return -ENODEV;
528
529 if (netif_is_ipvlan(phy_dev)) {
530 struct ipvl_dev *tmp = netdev_priv(phy_dev);
531
532 phy_dev = tmp->phy_dev;
533 if (!ns_capable(dev_net(phy_dev)->user_ns, CAP_NET_ADMIN))
534 return -EPERM;
535 } else if (!netif_is_ipvlan_port(phy_dev)) {
536
537 if (phy_dev->type != ARPHRD_ETHER ||
538 phy_dev->flags & IFF_LOOPBACK) {
539 netdev_err(phy_dev,
540 "Master is either lo or non-ether device\n");
541 return -EINVAL;
542 }
543
544 if (netdev_is_rx_handler_busy(phy_dev)) {
545 netdev_err(phy_dev, "Device is already in use.\n");
546 return -EBUSY;
547 }
548 }
549
550 ipvlan->phy_dev = phy_dev;
551 ipvlan->dev = dev;
552 ipvlan->sfeatures = IPVLAN_FEATURES;
553 if (!tb[IFLA_MTU])
554 ipvlan_adjust_mtu(ipvlan, phy_dev);
555 INIT_LIST_HEAD(&ipvlan->addrs);
556 spin_lock_init(&ipvlan->addrs_lock);
557
558
559
560
561
562 memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
563
564 dev->priv_flags |= IFF_NO_RX_HANDLER;
565
566 err = register_netdevice(dev);
567 if (err < 0)
568 return err;
569
570
571 port = ipvlan_port_get_rtnl(phy_dev);
572 ipvlan->port = port;
573
574
575
576
577
578 if (port->dev_id_start == 0xFFFE)
579 port->dev_id_start = 0x1;
580
581
582
583
584
585
586 err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE,
587 GFP_KERNEL);
588 if (err < 0)
589 err = ida_simple_get(&port->ida, 0x1, port->dev_id_start,
590 GFP_KERNEL);
591 if (err < 0)
592 goto unregister_netdev;
593 dev->dev_id = err;
594
595
596 port->dev_id_start = err + 1;
597
598 err = netdev_upper_dev_link(phy_dev, dev, extack);
599 if (err)
600 goto remove_ida;
601
602
603
604
605 if (data && data[IFLA_IPVLAN_FLAGS])
606 port->flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]);
607
608 if (data && data[IFLA_IPVLAN_MODE])
609 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
610
611 err = ipvlan_set_port_mode(port, mode, extack);
612 if (err)
613 goto unlink_netdev;
614
615 list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
616 netif_stacked_transfer_operstate(phy_dev, dev);
617 return 0;
618
619unlink_netdev:
620 netdev_upper_dev_unlink(phy_dev, dev);
621remove_ida:
622 ida_simple_remove(&port->ida, dev->dev_id);
623unregister_netdev:
624 unregister_netdevice(dev);
625 return err;
626}
627EXPORT_SYMBOL_GPL(ipvlan_link_new);
628
629void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
630{
631 struct ipvl_dev *ipvlan = netdev_priv(dev);
632 struct ipvl_addr *addr, *next;
633
634 spin_lock_bh(&ipvlan->addrs_lock);
635 list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
636 ipvlan_ht_addr_del(addr);
637 list_del_rcu(&addr->anode);
638 kfree_rcu(addr, rcu);
639 }
640 spin_unlock_bh(&ipvlan->addrs_lock);
641
642 ida_simple_remove(&ipvlan->port->ida, dev->dev_id);
643 list_del_rcu(&ipvlan->pnode);
644 unregister_netdevice_queue(dev, head);
645 netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
646}
647EXPORT_SYMBOL_GPL(ipvlan_link_delete);
648
649void ipvlan_link_setup(struct net_device *dev)
650{
651 ether_setup(dev);
652
653 dev->max_mtu = ETH_MAX_MTU;
654 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
655 dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE;
656 dev->netdev_ops = &ipvlan_netdev_ops;
657 dev->needs_free_netdev = true;
658 dev->header_ops = &ipvlan_header_ops;
659 dev->ethtool_ops = &ipvlan_ethtool_ops;
660}
661EXPORT_SYMBOL_GPL(ipvlan_link_setup);
662
663static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
664{
665 [IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
666 [IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 },
667};
668
669static struct rtnl_link_ops ipvlan_link_ops = {
670 .kind = "ipvlan",
671 .priv_size = sizeof(struct ipvl_dev),
672
673 .setup = ipvlan_link_setup,
674 .newlink = ipvlan_link_new,
675 .dellink = ipvlan_link_delete,
676};
677
678int ipvlan_link_register(struct rtnl_link_ops *ops)
679{
680 ops->get_size = ipvlan_nl_getsize;
681 ops->policy = ipvlan_nl_policy;
682 ops->validate = ipvlan_nl_validate;
683 ops->fill_info = ipvlan_nl_fillinfo;
684 ops->changelink = ipvlan_nl_changelink;
685 ops->maxtype = IFLA_IPVLAN_MAX;
686 return rtnl_link_register(ops);
687}
688EXPORT_SYMBOL_GPL(ipvlan_link_register);
689
690static int ipvlan_device_event(struct notifier_block *unused,
691 unsigned long event, void *ptr)
692{
693 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
694 struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
695 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
696 struct ipvl_dev *ipvlan, *next;
697 struct ipvl_port *port;
698 LIST_HEAD(lst_kill);
699 int err;
700
701 if (!netif_is_ipvlan_port(dev))
702 return NOTIFY_DONE;
703
704 port = ipvlan_port_get_rtnl(dev);
705
706 switch (event) {
707 case NETDEV_CHANGE:
708 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
709 netif_stacked_transfer_operstate(ipvlan->phy_dev,
710 ipvlan->dev);
711 break;
712
713 case NETDEV_REGISTER: {
714 struct net *oldnet, *newnet = dev_net(dev);
715
716 oldnet = read_pnet(&port->pnet);
717 if (net_eq(newnet, oldnet))
718 break;
719
720 write_pnet(&port->pnet, newnet);
721
722 ipvlan_migrate_l3s_hook(oldnet, newnet);
723 break;
724 }
725 case NETDEV_UNREGISTER:
726 if (dev->reg_state != NETREG_UNREGISTERING)
727 break;
728
729 list_for_each_entry_safe(ipvlan, next, &port->ipvlans, pnode)
730 ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
731 &lst_kill);
732 unregister_netdevice_many(&lst_kill);
733 break;
734
735 case NETDEV_FEAT_CHANGE:
736 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
737 ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
738 ipvlan->dev->gso_max_size = dev->gso_max_size;
739 ipvlan->dev->gso_max_segs = dev->gso_max_segs;
740 netdev_features_change(ipvlan->dev);
741 }
742 break;
743
744 case NETDEV_CHANGEMTU:
745 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
746 ipvlan_adjust_mtu(ipvlan, dev);
747 break;
748
749 case NETDEV_PRE_CHANGEADDR:
750 prechaddr_info = ptr;
751 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
752 err = dev_pre_changeaddr_notify(ipvlan->dev,
753 prechaddr_info->dev_addr,
754 extack);
755 if (err)
756 return notifier_from_errno(err);
757 }
758 break;
759
760 case NETDEV_CHANGEADDR:
761 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
762 ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr);
763 call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev);
764 }
765 break;
766
767 case NETDEV_PRE_TYPE_CHANGE:
768
769 return NOTIFY_BAD;
770 }
771 return NOTIFY_DONE;
772}
773
774
775static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
776{
777 struct ipvl_addr *addr;
778
779 addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
780 if (!addr)
781 return -ENOMEM;
782
783 addr->master = ipvlan;
784 if (!is_v6) {
785 memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr));
786 addr->atype = IPVL_IPV4;
787#if IS_ENABLED(CONFIG_IPV6)
788 } else {
789 memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr));
790 addr->atype = IPVL_IPV6;
791#endif
792 }
793
794 list_add_tail_rcu(&addr->anode, &ipvlan->addrs);
795
796
797
798
799 if (netif_running(ipvlan->dev))
800 ipvlan_ht_addr_add(ipvlan, addr);
801
802 return 0;
803}
804
805static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
806{
807 struct ipvl_addr *addr;
808
809 spin_lock_bh(&ipvlan->addrs_lock);
810 addr = ipvlan_find_addr(ipvlan, iaddr, is_v6);
811 if (!addr) {
812 spin_unlock_bh(&ipvlan->addrs_lock);
813 return;
814 }
815
816 ipvlan_ht_addr_del(addr);
817 list_del_rcu(&addr->anode);
818 spin_unlock_bh(&ipvlan->addrs_lock);
819 kfree_rcu(addr, rcu);
820}
821
822static bool ipvlan_is_valid_dev(const struct net_device *dev)
823{
824 struct ipvl_dev *ipvlan = netdev_priv(dev);
825
826 if (!netif_is_ipvlan(dev))
827 return false;
828
829 if (!ipvlan || !ipvlan->port)
830 return false;
831
832 return true;
833}
834
835#if IS_ENABLED(CONFIG_IPV6)
836static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
837{
838 int ret = -EINVAL;
839
840 spin_lock_bh(&ipvlan->addrs_lock);
841 if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true))
842 netif_err(ipvlan, ifup, ipvlan->dev,
843 "Failed to add IPv6=%pI6c addr for %s intf\n",
844 ip6_addr, ipvlan->dev->name);
845 else
846 ret = ipvlan_add_addr(ipvlan, ip6_addr, true);
847 spin_unlock_bh(&ipvlan->addrs_lock);
848 return ret;
849}
850
851static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
852{
853 return ipvlan_del_addr(ipvlan, ip6_addr, true);
854}
855
856static int ipvlan_addr6_event(struct notifier_block *unused,
857 unsigned long event, void *ptr)
858{
859 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
860 struct net_device *dev = (struct net_device *)if6->idev->dev;
861 struct ipvl_dev *ipvlan = netdev_priv(dev);
862
863 if (!ipvlan_is_valid_dev(dev))
864 return NOTIFY_DONE;
865
866 switch (event) {
867 case NETDEV_UP:
868 if (ipvlan_add_addr6(ipvlan, &if6->addr))
869 return NOTIFY_BAD;
870 break;
871
872 case NETDEV_DOWN:
873 ipvlan_del_addr6(ipvlan, &if6->addr);
874 break;
875 }
876
877 return NOTIFY_OK;
878}
879
880static int ipvlan_addr6_validator_event(struct notifier_block *unused,
881 unsigned long event, void *ptr)
882{
883 struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr;
884 struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev;
885 struct ipvl_dev *ipvlan = netdev_priv(dev);
886
887 if (!ipvlan_is_valid_dev(dev))
888 return NOTIFY_DONE;
889
890 switch (event) {
891 case NETDEV_UP:
892 if (ipvlan_addr_busy(ipvlan->port, &i6vi->i6vi_addr, true)) {
893 NL_SET_ERR_MSG(i6vi->extack,
894 "Address already assigned to an ipvlan device");
895 return notifier_from_errno(-EADDRINUSE);
896 }
897 break;
898 }
899
900 return NOTIFY_OK;
901}
902#endif
903
904static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
905{
906 int ret = -EINVAL;
907
908 spin_lock_bh(&ipvlan->addrs_lock);
909 if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false))
910 netif_err(ipvlan, ifup, ipvlan->dev,
911 "Failed to add IPv4=%pI4 on %s intf.\n",
912 ip4_addr, ipvlan->dev->name);
913 else
914 ret = ipvlan_add_addr(ipvlan, ip4_addr, false);
915 spin_unlock_bh(&ipvlan->addrs_lock);
916 return ret;
917}
918
919static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
920{
921 return ipvlan_del_addr(ipvlan, ip4_addr, false);
922}
923
924static int ipvlan_addr4_event(struct notifier_block *unused,
925 unsigned long event, void *ptr)
926{
927 struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
928 struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
929 struct ipvl_dev *ipvlan = netdev_priv(dev);
930 struct in_addr ip4_addr;
931
932 if (!ipvlan_is_valid_dev(dev))
933 return NOTIFY_DONE;
934
935 switch (event) {
936 case NETDEV_UP:
937 ip4_addr.s_addr = if4->ifa_address;
938 if (ipvlan_add_addr4(ipvlan, &ip4_addr))
939 return NOTIFY_BAD;
940 break;
941
942 case NETDEV_DOWN:
943 ip4_addr.s_addr = if4->ifa_address;
944 ipvlan_del_addr4(ipvlan, &ip4_addr);
945 break;
946 }
947
948 return NOTIFY_OK;
949}
950
951static int ipvlan_addr4_validator_event(struct notifier_block *unused,
952 unsigned long event, void *ptr)
953{
954 struct in_validator_info *ivi = (struct in_validator_info *)ptr;
955 struct net_device *dev = (struct net_device *)ivi->ivi_dev->dev;
956 struct ipvl_dev *ipvlan = netdev_priv(dev);
957
958 if (!ipvlan_is_valid_dev(dev))
959 return NOTIFY_DONE;
960
961 switch (event) {
962 case NETDEV_UP:
963 if (ipvlan_addr_busy(ipvlan->port, &ivi->ivi_addr, false)) {
964 NL_SET_ERR_MSG(ivi->extack,
965 "Address already assigned to an ipvlan device");
966 return notifier_from_errno(-EADDRINUSE);
967 }
968 break;
969 }
970
971 return NOTIFY_OK;
972}
973
974static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
975 .notifier_call = ipvlan_addr4_event,
976};
977
978static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly = {
979 .notifier_call = ipvlan_addr4_validator_event,
980};
981
982static struct notifier_block ipvlan_notifier_block __read_mostly = {
983 .notifier_call = ipvlan_device_event,
984};
985
986#if IS_ENABLED(CONFIG_IPV6)
987static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
988 .notifier_call = ipvlan_addr6_event,
989};
990
991static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = {
992 .notifier_call = ipvlan_addr6_validator_event,
993};
994#endif
995
996static int __init ipvlan_init_module(void)
997{
998 int err;
999
1000 ipvlan_init_secret();
1001 register_netdevice_notifier(&ipvlan_notifier_block);
1002#if IS_ENABLED(CONFIG_IPV6)
1003 register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
1004 register_inet6addr_validator_notifier(
1005 &ipvlan_addr6_vtor_notifier_block);
1006#endif
1007 register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
1008 register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block);
1009
1010 err = ipvlan_l3s_init();
1011 if (err < 0)
1012 goto error;
1013
1014 err = ipvlan_link_register(&ipvlan_link_ops);
1015 if (err < 0) {
1016 ipvlan_l3s_cleanup();
1017 goto error;
1018 }
1019
1020 return 0;
1021error:
1022 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
1023 unregister_inetaddr_validator_notifier(
1024 &ipvlan_addr4_vtor_notifier_block);
1025#if IS_ENABLED(CONFIG_IPV6)
1026 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
1027 unregister_inet6addr_validator_notifier(
1028 &ipvlan_addr6_vtor_notifier_block);
1029#endif
1030 unregister_netdevice_notifier(&ipvlan_notifier_block);
1031 return err;
1032}
1033
1034static void __exit ipvlan_cleanup_module(void)
1035{
1036 rtnl_link_unregister(&ipvlan_link_ops);
1037 ipvlan_l3s_cleanup();
1038 unregister_netdevice_notifier(&ipvlan_notifier_block);
1039 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
1040 unregister_inetaddr_validator_notifier(
1041 &ipvlan_addr4_vtor_notifier_block);
1042#if IS_ENABLED(CONFIG_IPV6)
1043 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
1044 unregister_inet6addr_validator_notifier(
1045 &ipvlan_addr6_vtor_notifier_block);
1046#endif
1047}
1048
1049module_init(ipvlan_init_module);
1050module_exit(ipvlan_cleanup_module);
1051
1052MODULE_LICENSE("GPL");
1053MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
1054MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
1055MODULE_ALIAS_RTNL_LINK("ipvlan");
1056
