]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/net/ipvlan/ipvlan_main.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-artful-kernel.git] / drivers / net / ipvlan / ipvlan_main.c
CommitLineData
2ad7bf36
MB		 1/* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
7 *
8 */
9
10#include "ipvlan.h"
11
4fbae7d8
MB		 12static u32 ipvl_nf_hook_refcnt = 0;
13
14static struct nf_hook_ops ipvl_nfops[] __read_mostly = {
15 {
16 .hook = ipvlan_nf_input,
17 .pf = NFPROTO_IPV4,
18 .hooknum = NF_INET_LOCAL_IN,
19 .priority = INT_MAX,
20 },
21 {
22 .hook = ipvlan_nf_input,
23 .pf = NFPROTO_IPV6,
24 .hooknum = NF_INET_LOCAL_IN,
25 .priority = INT_MAX,
26 },
27};
28
29static struct l3mdev_ops ipvl_l3mdev_ops __read_mostly = {
30 .l3mdev_l3_rcv = ipvlan_l3_rcv,
31};
32
ab5b7013 33static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
2ad7bf36
MB		 34{
35 ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj;
36}
37
4fbae7d8
MB		 38static int ipvlan_register_nf_hook(void)
39{
40 int err = 0;
41
42 if (!ipvl_nf_hook_refcnt) {
43 err = _nf_register_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops));
44 if (!err)
45 ipvl_nf_hook_refcnt = 1;
46 } else {
47 ipvl_nf_hook_refcnt++;
48 }
49
50 return err;
51}
52
53static void ipvlan_unregister_nf_hook(void)
54{
55 WARN_ON(!ipvl_nf_hook_refcnt);
56
57 ipvl_nf_hook_refcnt--;
58 if (!ipvl_nf_hook_refcnt)
59 _nf_unregister_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops));
60}
61
62static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval)
2ad7bf36
MB		 63{
64 struct ipvl_dev *ipvlan;
4fbae7d8
MB		 65 struct net_device *mdev = port->dev;
66 int err = 0;
2ad7bf36 67
4fbae7d8 68 ASSERT_RTNL();
2ad7bf36 69 if (port->mode != nval) {
4fbae7d8
MB		 70 if (nval == IPVLAN_MODE_L3S) {
71 /* New mode is L3S */
72 err = ipvlan_register_nf_hook();
73 if (!err) {
74 mdev->l3mdev_ops = &ipvl_l3mdev_ops;
75 mdev->priv_flags |= IFF_L3MDEV_MASTER;
76 } else
77 return err;
78 } else if (port->mode == IPVLAN_MODE_L3S) {
79 /* Old mode was L3S */
80 mdev->priv_flags &= ~IFF_L3MDEV_MASTER;
81 ipvlan_unregister_nf_hook();
82 mdev->l3mdev_ops = NULL;
83 }
2ad7bf36 84 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
4fbae7d8 85 if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S)
2ad7bf36
MB		 86 ipvlan->dev->flags |= IFF_NOARP;
87 else
88 ipvlan->dev->flags &= ~IFF_NOARP;
89 }
90 port->mode = nval;
91 }
4fbae7d8 92 return err;
2ad7bf36
MB		 93}
94
95static int ipvlan_port_create(struct net_device *dev)
96{
97 struct ipvl_port *port;
98 int err, idx;
99
100 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) {
101 netdev_err(dev, "Master is either lo or non-ether device\n");
102 return -EINVAL;
103 }
764e433b
MB		 104
105 if (netif_is_macvlan_port(dev)) {
106 netdev_err(dev, "Master is a macvlan port.\n");
107 return -EBUSY;
108 }
109
2ad7bf36
MB		 110 port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL);
111 if (!port)
112 return -ENOMEM;
113
114 port->dev = dev;
115 port->mode = IPVLAN_MODE_L3;
116 INIT_LIST_HEAD(&port->ipvlans);
117 for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++)
118 INIT_HLIST_HEAD(&port->hlhead[idx]);
119
ba35f858
MB		 120 skb_queue_head_init(&port->backlog);
121 INIT_WORK(&port->wq, ipvlan_process_multicast);
122
2ad7bf36
MB		 123 err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
124 if (err)
125 goto err;
126
127 dev->priv_flags |= IFF_IPVLAN_MASTER;
128 return 0;
129
130err:
131 kfree_rcu(port, rcu);
132 return err;
133}
134
135static void ipvlan_port_destroy(struct net_device *dev)
136{
137 struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
138
139 dev->priv_flags &= ~IFF_IPVLAN_MASTER;
4fbae7d8
MB		 140 if (port->mode == IPVLAN_MODE_L3S) {
141 dev->priv_flags &= ~IFF_L3MDEV_MASTER;
142 ipvlan_unregister_nf_hook();
143 dev->l3mdev_ops = NULL;
144 }
2ad7bf36 145 netdev_rx_handler_unregister(dev);
ba35f858
MB		 146 cancel_work_sync(&port->wq);
147 __skb_queue_purge(&port->backlog);
2ad7bf36
MB		 148 kfree_rcu(port, rcu);
149}
150
2ad7bf36 151#define IPVLAN_FEATURES \
a188222b 152 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
2ad7bf36
MB		 153 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
154 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
155 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
156
157#define IPVLAN_STATE_MASK \
158 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
159
2ad7bf36
MB		 160static int ipvlan_init(struct net_device *dev)
161{
162 struct ipvl_dev *ipvlan = netdev_priv(dev);
163 const struct net_device *phy_dev = ipvlan->phy_dev;
494e8489 164 struct ipvl_port *port = ipvlan->port;
2ad7bf36
MB		 165
166 dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
167 (phy_dev->state & IPVLAN_STATE_MASK);
168 dev->features = phy_dev->features & IPVLAN_FEATURES;
169 dev->features |= NETIF_F_LLTX;
170 dev->gso_max_size = phy_dev->gso_max_size;
f6773c5e 171 dev->gso_max_segs = phy_dev->gso_max_segs;
2ad7bf36
MB		 172 dev->hard_header_len = phy_dev->hard_header_len;
173
0d7dd798 174 netdev_lockdep_set_classes(dev);
2ad7bf36
MB		 175
176 ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats);
177 if (!ipvlan->pcpu_stats)
178 return -ENOMEM;
179
494e8489
MB		 180 port->count += 1;
181
2ad7bf36
MB		 182 return 0;
183}
184
185static void ipvlan_uninit(struct net_device *dev)
186{
187 struct ipvl_dev *ipvlan = netdev_priv(dev);
188 struct ipvl_port *port = ipvlan->port;
189
04901cea 190 free_percpu(ipvlan->pcpu_stats);
2ad7bf36
MB		 191
192 port->count -= 1;
193 if (!port->count)
194 ipvlan_port_destroy(port->dev);
195}
196
197static int ipvlan_open(struct net_device *dev)
198{
199 struct ipvl_dev *ipvlan = netdev_priv(dev);
200 struct net_device *phy_dev = ipvlan->phy_dev;
201 struct ipvl_addr *addr;
202
4fbae7d8
MB		 203 if (ipvlan->port->mode == IPVLAN_MODE_L3 ||
204 ipvlan->port->mode == IPVLAN_MODE_L3S)
2ad7bf36
MB		 205 dev->flags |= IFF_NOARP;
206 else
207 dev->flags &= ~IFF_NOARP;
208
515866f8
KK		 209 list_for_each_entry(addr, &ipvlan->addrs, anode)
210 ipvlan_ht_addr_add(ipvlan, addr);
211
2ad7bf36
MB		 212 return dev_uc_add(phy_dev, phy_dev->dev_addr);
213}
214
215static int ipvlan_stop(struct net_device *dev)
216{
217 struct ipvl_dev *ipvlan = netdev_priv(dev);
218 struct net_device *phy_dev = ipvlan->phy_dev;
219 struct ipvl_addr *addr;
220
221 dev_uc_unsync(phy_dev, dev);
222 dev_mc_unsync(phy_dev, dev);
223
224 dev_uc_del(phy_dev, phy_dev->dev_addr);
225
515866f8 226 list_for_each_entry(addr, &ipvlan->addrs, anode)
6640e673 227 ipvlan_ht_addr_del(addr);
515866f8 228
2ad7bf36
MB		 229 return 0;
230}
231
92c7b0de
MB		 232static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
233 struct net_device *dev)
2ad7bf36
MB		 234{
235 const struct ipvl_dev *ipvlan = netdev_priv(dev);
236 int skblen = skb->len;
237 int ret;
238
239 ret = ipvlan_queue_xmit(skb, dev);
240 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
241 struct ipvl_pcpu_stats *pcptr;
242
243 pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
244
245 u64_stats_update_begin(&pcptr->syncp);
246 pcptr->tx_pkts++;
247 pcptr->tx_bytes += skblen;
248 u64_stats_update_end(&pcptr->syncp);
249 } else {
250 this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
251 }
252 return ret;
253}
254
255static netdev_features_t ipvlan_fix_features(struct net_device *dev,
256 netdev_features_t features)
257{
258 struct ipvl_dev *ipvlan = netdev_priv(dev);
259
260 return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
261}
262
263static void ipvlan_change_rx_flags(struct net_device *dev, int change)
264{
265 struct ipvl_dev *ipvlan = netdev_priv(dev);
266 struct net_device *phy_dev = ipvlan->phy_dev;
267
268 if (change & IFF_ALLMULTI)
269 dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
270}
271
2ad7bf36
MB		 272static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
273{
274 struct ipvl_dev *ipvlan = netdev_priv(dev);
275
276 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
277 bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
278 } else {
279 struct netdev_hw_addr *ha;
280 DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
281
282 bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
283 netdev_for_each_mc_addr(ha, dev)
284 __set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
285
f631c44b
MB		 286 /* Turn-on broadcast bit irrespective of address family,
287 * since broadcast is deferred to a work-queue, hence no
288 * impact on fast-path processing.
289 */
290 __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters);
291
2ad7bf36
MB		 292 bitmap_copy(ipvlan->mac_filters, mc_filters,
293 IPVLAN_MAC_FILTER_SIZE);
294 }
295 dev_uc_sync(ipvlan->phy_dev, dev);
296 dev_mc_sync(ipvlan->phy_dev, dev);
297}
298
299static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev,
300 struct rtnl_link_stats64 *s)
301{
302 struct ipvl_dev *ipvlan = netdev_priv(dev);
303
304 if (ipvlan->pcpu_stats) {
305 struct ipvl_pcpu_stats *pcptr;
306 u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
307 u32 rx_errs = 0, tx_drps = 0;
308 u32 strt;
309 int idx;
310
311 for_each_possible_cpu(idx) {
312 pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
313 do {
314 strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
315 rx_pkts = pcptr->rx_pkts;
316 rx_bytes = pcptr->rx_bytes;
317 rx_mcast = pcptr->rx_mcast;
318 tx_pkts = pcptr->tx_pkts;
319 tx_bytes = pcptr->tx_bytes;
320 } while (u64_stats_fetch_retry_irq(&pcptr->syncp,
321 strt));
322
323 s->rx_packets += rx_pkts;
324 s->rx_bytes += rx_bytes;
325 s->multicast += rx_mcast;
326 s->tx_packets += tx_pkts;
327 s->tx_bytes += tx_bytes;
328
329 /* u32 values are updated without syncp protection. */
330 rx_errs += pcptr->rx_errs;
331 tx_drps += pcptr->tx_drps;
332 }
333 s->rx_errors = rx_errs;
334 s->rx_dropped = rx_errs;
335 s->tx_dropped = tx_drps;
336 }
337 return s;
338}
339
340static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
341{
342 struct ipvl_dev *ipvlan = netdev_priv(dev);
343 struct net_device *phy_dev = ipvlan->phy_dev;
344
345 return vlan_vid_add(phy_dev, proto, vid);
346}
347
348static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
349 u16 vid)
350{
351 struct ipvl_dev *ipvlan = netdev_priv(dev);
352 struct net_device *phy_dev = ipvlan->phy_dev;
353
354 vlan_vid_del(phy_dev, proto, vid);
355 return 0;
356}
357
7c411658
ND		 358static int ipvlan_get_iflink(const struct net_device *dev)
359{
360 struct ipvl_dev *ipvlan = netdev_priv(dev);
361
362 return ipvlan->phy_dev->ifindex;
363}
364
2ad7bf36
MB		 365static const struct net_device_ops ipvlan_netdev_ops = {
366 .ndo_init = ipvlan_init,
367 .ndo_uninit = ipvlan_uninit,
368 .ndo_open = ipvlan_open,
369 .ndo_stop = ipvlan_stop,
370 .ndo_start_xmit = ipvlan_start_xmit,
371 .ndo_fix_features = ipvlan_fix_features,
372 .ndo_change_rx_flags = ipvlan_change_rx_flags,
373 .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
374 .ndo_get_stats64 = ipvlan_get_stats64,
375 .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
376 .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
7c411658 377 .ndo_get_iflink = ipvlan_get_iflink,
2ad7bf36
MB		 378};
379
380static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
381 unsigned short type, const void *daddr,
382 const void *saddr, unsigned len)
383{
384 const struct ipvl_dev *ipvlan = netdev_priv(dev);
385 struct net_device *phy_dev = ipvlan->phy_dev;
386
387 /* TODO Probably use a different field than dev_addr so that the
388 * mac-address on the virtual device is portable and can be carried
389 * while the packets use the mac-addr on the physical device.
390 */
391 return dev_hard_header(skb, phy_dev, type, daddr,
392 saddr ? : dev->dev_addr, len);
393}
394
395static const struct header_ops ipvlan_header_ops = {
396 .create = ipvlan_hard_header,
2ad7bf36
MB		 397 .parse = eth_header_parse,
398 .cache = eth_header_cache,
399 .cache_update = eth_header_cache_update,
400};
401
314d10d7
DD		 402static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev,
403 struct ethtool_link_ksettings *cmd)
2ad7bf36
MB		 404{
405 const struct ipvl_dev *ipvlan = netdev_priv(dev);
406
314d10d7 407 return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd);
2ad7bf36
MB		 408}
409
410static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
411 struct ethtool_drvinfo *drvinfo)
412{
413 strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
414 strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
415}
416
417static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
418{
419 const struct ipvl_dev *ipvlan = netdev_priv(dev);
420
421 return ipvlan->msg_enable;
422}
423
424static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
425{
426 struct ipvl_dev *ipvlan = netdev_priv(dev);
427
428 ipvlan->msg_enable = value;
429}
430
431static const struct ethtool_ops ipvlan_ethtool_ops = {
432 .get_link = ethtool_op_get_link,
314d10d7 433 .get_link_ksettings = ipvlan_ethtool_get_link_ksettings,
2ad7bf36
MB		 434 .get_drvinfo = ipvlan_ethtool_get_drvinfo,
435 .get_msglevel = ipvlan_ethtool_get_msglevel,
436 .set_msglevel = ipvlan_ethtool_set_msglevel,
437};
438
439static int ipvlan_nl_changelink(struct net_device *dev,
440 struct nlattr *tb[], struct nlattr *data[])
441{
442 struct ipvl_dev *ipvlan = netdev_priv(dev);
443 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
4fbae7d8 444 int err = 0;
2ad7bf36
MB		 445
446 if (data && data[IFLA_IPVLAN_MODE]) {
447 u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
448
4fbae7d8 449 err = ipvlan_set_port_mode(port, nmode);
2ad7bf36 450 }
4fbae7d8 451 return err;
2ad7bf36
MB		 452}
453
454static size_t ipvlan_nl_getsize(const struct net_device *dev)
455{
456 return (0
457 + nla_total_size(2) /* IFLA_IPVLAN_MODE */
458 );
459}
460
461static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[])
462{
463 if (data && data[IFLA_IPVLAN_MODE]) {
464 u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
465
466 if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX)
467 return -EINVAL;
468 }
469 return 0;
470}
471
472static int ipvlan_nl_fillinfo(struct sk_buff *skb,
473 const struct net_device *dev)
474{
475 struct ipvl_dev *ipvlan = netdev_priv(dev);
476 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
477 int ret = -EINVAL;
478
479 if (!port)
480 goto err;
481
482 ret = -EMSGSIZE;
483 if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
484 goto err;
485
486 return 0;
487
488err:
489 return ret;
490}
491
492static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
493 struct nlattr *tb[], struct nlattr *data[])
494{
495 struct ipvl_dev *ipvlan = netdev_priv(dev);
496 struct ipvl_port *port;
497 struct net_device *phy_dev;
498 int err;
e93fbc5a 499 u16 mode = IPVLAN_MODE_L3;
2ad7bf36
MB		 500
501 if (!tb[IFLA_LINK])
502 return -EINVAL;
503
504 phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
505 if (!phy_dev)
506 return -ENODEV;
507
5933fea7 508 if (netif_is_ipvlan(phy_dev)) {
2ad7bf36
MB		 509 struct ipvl_dev *tmp = netdev_priv(phy_dev);
510
511 phy_dev = tmp->phy_dev;
5933fea7 512 } else if (!netif_is_ipvlan_port(phy_dev)) {
2ad7bf36
MB		 513 err = ipvlan_port_create(phy_dev);
514 if (err < 0)
515 return err;
516 }
517
2ad7bf36 518 if (data && data[IFLA_IPVLAN_MODE])
e93fbc5a 519 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
2ad7bf36 520
e93fbc5a 521 port = ipvlan_port_get_rtnl(phy_dev);
2ad7bf36
MB		 522 ipvlan->phy_dev = phy_dev;
523 ipvlan->dev = dev;
524 ipvlan->port = port;
525 ipvlan->sfeatures = IPVLAN_FEATURES;
296d4856 526 ipvlan_adjust_mtu(ipvlan, phy_dev);
2ad7bf36 527 INIT_LIST_HEAD(&ipvlan->addrs);
2ad7bf36
MB		 528
529 /* TODO Probably put random address here to be presented to the
530 * world but keep using the physical-dev address for the outgoing
531 * packets.
532 */
533 memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
534
535 dev->priv_flags |= IFF_IPVLAN_SLAVE;
536
2ad7bf36
MB		 537 err = register_netdevice(dev);
538 if (err < 0)
494e8489 539 return err;
2ad7bf36
MB		 540
541 err = netdev_upper_dev_link(phy_dev, dev);
494e8489
MB		 542 if (err) {
543 unregister_netdevice(dev);
544 return err;
545 }
4fbae7d8
MB		 546 err = ipvlan_set_port_mode(port, mode);
547 if (err) {
548 unregister_netdevice(dev);
549 return err;
550 }
2ad7bf36
MB		 551
552 list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
553 netif_stacked_transfer_operstate(phy_dev, dev);
554 return 0;
2ad7bf36
MB		 555}
556
557static void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
558{
559 struct ipvl_dev *ipvlan = netdev_priv(dev);
560 struct ipvl_addr *addr, *next;
561
515866f8 562 list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
6640e673 563 ipvlan_ht_addr_del(addr);
515866f8 564 list_del(&addr->anode);
6a725497 565 kfree_rcu(addr, rcu);
2ad7bf36 566 }
515866f8 567
2ad7bf36
MB		 568 list_del_rcu(&ipvlan->pnode);
569 unregister_netdevice_queue(dev, head);
570 netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
571}
572
573static void ipvlan_link_setup(struct net_device *dev)
574{
575 ether_setup(dev);
576
577 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
bf485bcf 578 dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE;
2ad7bf36
MB		 579 dev->netdev_ops = &ipvlan_netdev_ops;
580 dev->destructor = free_netdev;
581 dev->header_ops = &ipvlan_header_ops;
582 dev->ethtool_ops = &ipvlan_ethtool_ops;
2ad7bf36
MB		 583}
584
585static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
586{
587 [IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
588};
589
590static struct rtnl_link_ops ipvlan_link_ops = {
591 .kind = "ipvlan",
592 .priv_size = sizeof(struct ipvl_dev),
593
594 .get_size = ipvlan_nl_getsize,
595 .policy = ipvlan_nl_policy,
596 .validate = ipvlan_nl_validate,
597 .fill_info = ipvlan_nl_fillinfo,
598 .changelink = ipvlan_nl_changelink,
599 .maxtype = IFLA_IPVLAN_MAX,
600
601 .setup = ipvlan_link_setup,
602 .newlink = ipvlan_link_new,
603 .dellink = ipvlan_link_delete,
604};
605
92c7b0de 606static int ipvlan_link_register(struct rtnl_link_ops *ops)
2ad7bf36
MB		 607{
608 return rtnl_link_register(ops);
609}
610
611static int ipvlan_device_event(struct notifier_block *unused,
612 unsigned long event, void *ptr)
613{
614 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
615 struct ipvl_dev *ipvlan, *next;
616 struct ipvl_port *port;
617 LIST_HEAD(lst_kill);
618
5933fea7 619 if (!netif_is_ipvlan_port(dev))
2ad7bf36
MB		 620 return NOTIFY_DONE;
621
622 port = ipvlan_port_get_rtnl(dev);
623
624 switch (event) {
625 case NETDEV_CHANGE:
626 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
627 netif_stacked_transfer_operstate(ipvlan->phy_dev,
628 ipvlan->dev);
629 break;
630
631 case NETDEV_UNREGISTER:
632 if (dev->reg_state != NETREG_UNREGISTERING)
633 break;
634
635 list_for_each_entry_safe(ipvlan, next, &port->ipvlans,
636 pnode)
637 ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
638 &lst_kill);
639 unregister_netdevice_many(&lst_kill);
640 break;
641
642 case NETDEV_FEAT_CHANGE:
643 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
644 ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
645 ipvlan->dev->gso_max_size = dev->gso_max_size;
f6773c5e 646 ipvlan->dev->gso_max_segs = dev->gso_max_segs;
2ad7bf36
MB		 647 netdev_features_change(ipvlan->dev);
648 }
649 break;
650
651 case NETDEV_CHANGEMTU:
652 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
653 ipvlan_adjust_mtu(ipvlan, dev);
654 break;
655
656 case NETDEV_PRE_TYPE_CHANGE:
657 /* Forbid underlying device to change its type. */
658 return NOTIFY_BAD;
659 }
660 return NOTIFY_DONE;
661}
662
663static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
664{
665 struct ipvl_addr *addr;
666
e9997c29 667 if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
2ad7bf36
MB		 668 netif_err(ipvlan, ifup, ipvlan->dev,
669 "Failed to add IPv6=%pI6c addr for %s intf\n",
670 ip6_addr, ipvlan->dev->name);
671 return -EINVAL;
672 }
673 addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
674 if (!addr)
675 return -ENOMEM;
676
677 addr->master = ipvlan;
678 memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr));
679 addr->atype = IPVL_IPV6;
40891e8a 680 list_add_tail(&addr->anode, &ipvlan->addrs);
515866f8 681
27705f70
JB		 682 /* If the interface is not up, the address will be added to the hash
683 * list by ipvlan_open.
684 */
685 if (netif_running(ipvlan->dev))
686 ipvlan_ht_addr_add(ipvlan, addr);
2ad7bf36
MB		 687
688 return 0;
689}
690
691static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
692{
693 struct ipvl_addr *addr;
694
e9997c29 695 addr = ipvlan_find_addr(ipvlan, ip6_addr, true);
2ad7bf36
MB		 696 if (!addr)
697 return;
698
6640e673 699 ipvlan_ht_addr_del(addr);
40891e8a 700 list_del(&addr->anode);
2ad7bf36
MB		 701 kfree_rcu(addr, rcu);
702
703 return;
704}
705
706static int ipvlan_addr6_event(struct notifier_block *unused,
707 unsigned long event, void *ptr)
708{
709 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
710 struct net_device *dev = (struct net_device *)if6->idev->dev;
711 struct ipvl_dev *ipvlan = netdev_priv(dev);
712
23a5a49c
KK		 713 /* FIXME IPv6 autoconf calls us from bh without RTNL */
714 if (in_softirq())
715 return NOTIFY_DONE;
716
5933fea7 717 if (!netif_is_ipvlan(dev))
2ad7bf36
MB		 718 return NOTIFY_DONE;
719
720 if (!ipvlan || !ipvlan->port)
721 return NOTIFY_DONE;
722
723 switch (event) {
724 case NETDEV_UP:
725 if (ipvlan_add_addr6(ipvlan, &if6->addr))
726 return NOTIFY_BAD;
727 break;
728
729 case NETDEV_DOWN:
730 ipvlan_del_addr6(ipvlan, &if6->addr);
731 break;
732 }
733
734 return NOTIFY_OK;
735}
736
737static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
738{
739 struct ipvl_addr *addr;
740
e9997c29 741 if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) {
2ad7bf36
MB		 742 netif_err(ipvlan, ifup, ipvlan->dev,
743 "Failed to add IPv4=%pI4 on %s intf.\n",
744 ip4_addr, ipvlan->dev->name);
745 return -EINVAL;
746 }
747 addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL);
748 if (!addr)
749 return -ENOMEM;
750
751 addr->master = ipvlan;
752 memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr));
753 addr->atype = IPVL_IPV4;
40891e8a 754 list_add_tail(&addr->anode, &ipvlan->addrs);
515866f8 755
27705f70
JB		 756 /* If the interface is not up, the address will be added to the hash
757 * list by ipvlan_open.
758 */
759 if (netif_running(ipvlan->dev))
760 ipvlan_ht_addr_add(ipvlan, addr);
2ad7bf36
MB		 761
762 return 0;
763}
764
765static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
766{
767 struct ipvl_addr *addr;
768
e9997c29 769 addr = ipvlan_find_addr(ipvlan, ip4_addr, false);
2ad7bf36
MB		 770 if (!addr)
771 return;
772
6640e673 773 ipvlan_ht_addr_del(addr);
40891e8a 774 list_del(&addr->anode);
2ad7bf36
MB		 775 kfree_rcu(addr, rcu);
776
777 return;
778}
779
780static int ipvlan_addr4_event(struct notifier_block *unused,
781 unsigned long event, void *ptr)
782{
783 struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
784 struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
785 struct ipvl_dev *ipvlan = netdev_priv(dev);
786 struct in_addr ip4_addr;
787
5933fea7 788 if (!netif_is_ipvlan(dev))
2ad7bf36
MB		 789 return NOTIFY_DONE;
790
791 if (!ipvlan || !ipvlan->port)
792 return NOTIFY_DONE;
793
794 switch (event) {
795 case NETDEV_UP:
796 ip4_addr.s_addr = if4->ifa_address;
797 if (ipvlan_add_addr4(ipvlan, &ip4_addr))
798 return NOTIFY_BAD;
799 break;
800
801 case NETDEV_DOWN:
802 ip4_addr.s_addr = if4->ifa_address;
803 ipvlan_del_addr4(ipvlan, &ip4_addr);
804 break;
805 }
806
807 return NOTIFY_OK;
808}
809
810static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
811 .notifier_call = ipvlan_addr4_event,
812};
813
814static struct notifier_block ipvlan_notifier_block __read_mostly = {
815 .notifier_call = ipvlan_device_event,
816};
817
818static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
819 .notifier_call = ipvlan_addr6_event,
820};
821
822static int __init ipvlan_init_module(void)
823{
824 int err;
825
826 ipvlan_init_secret();
827 register_netdevice_notifier(&ipvlan_notifier_block);
828 register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
829 register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
830
831 err = ipvlan_link_register(&ipvlan_link_ops);
832 if (err < 0)
833 goto error;
834
835 return 0;
836error:
837 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
838 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
839 unregister_netdevice_notifier(&ipvlan_notifier_block);
840 return err;
841}
842
843static void __exit ipvlan_cleanup_module(void)
844{
845 rtnl_link_unregister(&ipvlan_link_ops);
846 unregister_netdevice_notifier(&ipvlan_notifier_block);
847 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
848 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
849}
850
851module_init(ipvlan_init_module);
852module_exit(ipvlan_cleanup_module);
853
854MODULE_LICENSE("GPL");
855MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
856MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
857MODULE_ALIAS_RTNL_LINK("ipvlan");
Ubuntu Artful kernel mirror