projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
[deliverable/linux.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
ab5b7013 12static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
2ad7bf36
MB		 13{
14 ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj;
15}
16
e93fbc5a 17static void ipvlan_set_port_mode(struct ipvl_port *port, u16 nval)
2ad7bf36
MB		 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 }
764e433b
MB		 41
42 if (netif_is_macvlan_port(dev)) {
43 netdev_err(dev, "Master is a macvlan port.\n");
44 return -EBUSY;
45 }
46
2ad7bf36
MB		 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
ba35f858
MB		 57 skb_queue_head_init(&port->backlog);
58 INIT_WORK(&port->wq, ipvlan_process_multicast);
59
2ad7bf36
MB		 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);
ba35f858
MB		 78 cancel_work_sync(&port->wq);
79 __skb_queue_purge(&port->backlog);
2ad7bf36
MB		 80 kfree_rcu(port, rcu);
81}
82
83/* ipvlan network devices have devices nesting below it and are a special
84 * "super class" of normal network devices; split their locks off into a
85 * separate class since they always nest.
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 \
a188222b 91 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
2ad7bf36
MB		 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;
494e8489 116 struct ipvl_port *port = ipvlan->port;
2ad7bf36
MB		 117
118 dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
119 (phy_dev->state & IPVLAN_STATE_MASK);
120 dev->features = phy_dev->features & IPVLAN_FEATURES;
121 dev->features |= NETIF_F_LLTX;
122 dev->gso_max_size = phy_dev->gso_max_size;
f6773c5e 123 dev->gso_max_segs = phy_dev->gso_max_segs;
2ad7bf36
MB		 124 dev->hard_header_len = phy_dev->hard_header_len;
125
126 ipvlan_set_lockdep_class(dev);
127
128 ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats);
129 if (!ipvlan->pcpu_stats)
130 return -ENOMEM;
131
494e8489
MB		 132 port->count += 1;
133
2ad7bf36
MB		 134 return 0;
135}
136
137static void ipvlan_uninit(struct net_device *dev)
138{
139 struct ipvl_dev *ipvlan = netdev_priv(dev);
140 struct ipvl_port *port = ipvlan->port;
141
04901cea 142 free_percpu(ipvlan->pcpu_stats);
2ad7bf36
MB		 143
144 port->count -= 1;
145 if (!port->count)
146 ipvlan_port_destroy(port->dev);
147}
148
149static int ipvlan_open(struct net_device *dev)
150{
151 struct ipvl_dev *ipvlan = netdev_priv(dev);
152 struct net_device *phy_dev = ipvlan->phy_dev;
153 struct ipvl_addr *addr;
154
155 if (ipvlan->port->mode == IPVLAN_MODE_L3)
156 dev->flags |= IFF_NOARP;
157 else
158 dev->flags &= ~IFF_NOARP;
159
515866f8
KK		 160 list_for_each_entry(addr, &ipvlan->addrs, anode)
161 ipvlan_ht_addr_add(ipvlan, addr);
162
2ad7bf36
MB		 163 return dev_uc_add(phy_dev, phy_dev->dev_addr);
164}
165
166static int ipvlan_stop(struct net_device *dev)
167{
168 struct ipvl_dev *ipvlan = netdev_priv(dev);
169 struct net_device *phy_dev = ipvlan->phy_dev;
170 struct ipvl_addr *addr;
171
172 dev_uc_unsync(phy_dev, dev);
173 dev_mc_unsync(phy_dev, dev);
174
175 dev_uc_del(phy_dev, phy_dev->dev_addr);
176
515866f8 177 list_for_each_entry(addr, &ipvlan->addrs, anode)
6640e673 178 ipvlan_ht_addr_del(addr);
515866f8 179
2ad7bf36
MB		 180 return 0;
181}
182
92c7b0de
MB		 183static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
184 struct net_device *dev)
2ad7bf36
MB		 185{
186 const struct ipvl_dev *ipvlan = netdev_priv(dev);
187 int skblen = skb->len;
188 int ret;
189
190 ret = ipvlan_queue_xmit(skb, dev);
191 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
192 struct ipvl_pcpu_stats *pcptr;
193
194 pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
195
196 u64_stats_update_begin(&pcptr->syncp);
197 pcptr->tx_pkts++;
198 pcptr->tx_bytes += skblen;
199 u64_stats_update_end(&pcptr->syncp);
200 } else {
201 this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
202 }
203 return ret;
204}
205
206static netdev_features_t ipvlan_fix_features(struct net_device *dev,
207 netdev_features_t features)
208{
209 struct ipvl_dev *ipvlan = netdev_priv(dev);
210
211 return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
212}
213
214static void ipvlan_change_rx_flags(struct net_device *dev, int change)
215{
216 struct ipvl_dev *ipvlan = netdev_priv(dev);
217 struct net_device *phy_dev = ipvlan->phy_dev;
218
219 if (change & IFF_ALLMULTI)
220 dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
221}
222
2ad7bf36
MB		 223static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
224{
225 struct ipvl_dev *ipvlan = netdev_priv(dev);
226
227 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
228 bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
229 } else {
230 struct netdev_hw_addr *ha;
231 DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
232
233 bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
234 netdev_for_each_mc_addr(ha, dev)
235 __set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
236
f631c44b
MB		 237 /* Turn-on broadcast bit irrespective of address family,
238 * since broadcast is deferred to a work-queue, hence no
239 * impact on fast-path processing.
240 */
241 __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters);
242
2ad7bf36
MB		 243 bitmap_copy(ipvlan->mac_filters, mc_filters,
244 IPVLAN_MAC_FILTER_SIZE);
245 }
246 dev_uc_sync(ipvlan->phy_dev, dev);
247 dev_mc_sync(ipvlan->phy_dev, dev);
248}
249
250static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev,
251 struct rtnl_link_stats64 *s)
252{
253 struct ipvl_dev *ipvlan = netdev_priv(dev);
254
255 if (ipvlan->pcpu_stats) {
256 struct ipvl_pcpu_stats *pcptr;
257 u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
258 u32 rx_errs = 0, tx_drps = 0;
259 u32 strt;
260 int idx;
261
262 for_each_possible_cpu(idx) {
263 pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
264 do {
265 strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
266 rx_pkts = pcptr->rx_pkts;
267 rx_bytes = pcptr->rx_bytes;
268 rx_mcast = pcptr->rx_mcast;
269 tx_pkts = pcptr->tx_pkts;
270 tx_bytes = pcptr->tx_bytes;
271 } while (u64_stats_fetch_retry_irq(&pcptr->syncp,
272 strt));
273
274 s->rx_packets += rx_pkts;
275 s->rx_bytes += rx_bytes;
276 s->multicast += rx_mcast;
277 s->tx_packets += tx_pkts;
278 s->tx_bytes += tx_bytes;
279
280 /* u32 values are updated without syncp protection. */
281 rx_errs += pcptr->rx_errs;
282 tx_drps += pcptr->tx_drps;
283 }
284 s->rx_errors = rx_errs;
285 s->rx_dropped = rx_errs;
286 s->tx_dropped = tx_drps;
287 }
288 return s;
289}
290
291static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
292{
293 struct ipvl_dev *ipvlan = netdev_priv(dev);
294 struct net_device *phy_dev = ipvlan->phy_dev;
295
296 return vlan_vid_add(phy_dev, proto, vid);
297}
298
299static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
300 u16 vid)
301{
302 struct ipvl_dev *ipvlan = netdev_priv(dev);
303 struct net_device *phy_dev = ipvlan->phy_dev;
304
305 vlan_vid_del(phy_dev, proto, vid);
306 return 0;
307}
308
7c411658
ND		 309static int ipvlan_get_iflink(const struct net_device *dev)
310{
311 struct ipvl_dev *ipvlan = netdev_priv(dev);
312
313 return ipvlan->phy_dev->ifindex;
314}
315
2ad7bf36
MB		 316static const struct net_device_ops ipvlan_netdev_ops = {
317 .ndo_init = ipvlan_init,
318 .ndo_uninit = ipvlan_uninit,
319 .ndo_open = ipvlan_open,
320 .ndo_stop = ipvlan_stop,
321 .ndo_start_xmit = ipvlan_start_xmit,
322 .ndo_fix_features = ipvlan_fix_features,
323 .ndo_change_rx_flags = ipvlan_change_rx_flags,
324 .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
325 .ndo_get_stats64 = ipvlan_get_stats64,
326 .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
327 .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
7c411658 328 .ndo_get_iflink = ipvlan_get_iflink,
2ad7bf36
MB		 329};
330
331static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
332 unsigned short type, const void *daddr,
333 const void *saddr, unsigned len)
334{
335 const struct ipvl_dev *ipvlan = netdev_priv(dev);
336 struct net_device *phy_dev = ipvlan->phy_dev;
337
338 /* TODO Probably use a different field than dev_addr so that the
339 * mac-address on the virtual device is portable and can be carried
340 * while the packets use the mac-addr on the physical device.
341 */
342 return dev_hard_header(skb, phy_dev, type, daddr,
343 saddr ? : dev->dev_addr, len);
344}
345
346static const struct header_ops ipvlan_header_ops = {
347 .create = ipvlan_hard_header,
2ad7bf36
MB		 348 .parse = eth_header_parse,
349 .cache = eth_header_cache,
350 .cache_update = eth_header_cache_update,
351};
352
314d10d7
DD		 353static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev,
354 struct ethtool_link_ksettings *cmd)
2ad7bf36
MB		 355{
356 const struct ipvl_dev *ipvlan = netdev_priv(dev);
357
314d10d7 358 return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd);
2ad7bf36
MB		 359}
360
361static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
362 struct ethtool_drvinfo *drvinfo)
363{
364 strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
365 strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
366}
367
368static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
369{
370 const struct ipvl_dev *ipvlan = netdev_priv(dev);
371
372 return ipvlan->msg_enable;
373}
374
375static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
376{
377 struct ipvl_dev *ipvlan = netdev_priv(dev);
378
379 ipvlan->msg_enable = value;
380}
381
382static const struct ethtool_ops ipvlan_ethtool_ops = {
383 .get_link = ethtool_op_get_link,
314d10d7 384 .get_link_ksettings = ipvlan_ethtool_get_link_ksettings,
2ad7bf36
MB		 385 .get_drvinfo = ipvlan_ethtool_get_drvinfo,
386 .get_msglevel = ipvlan_ethtool_get_msglevel,
387 .set_msglevel = ipvlan_ethtool_set_msglevel,
388};
389
390static int ipvlan_nl_changelink(struct net_device *dev,
391 struct nlattr *tb[], struct nlattr *data[])
392{
393 struct ipvl_dev *ipvlan = netdev_priv(dev);
394 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
395
396 if (data && data[IFLA_IPVLAN_MODE]) {
397 u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
398
399 ipvlan_set_port_mode(port, nmode);
400 }
401 return 0;
402}
403
404static size_t ipvlan_nl_getsize(const struct net_device *dev)
405{
406 return (0
407 + nla_total_size(2) /* IFLA_IPVLAN_MODE */
408 );
409}
410
411static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[])
412{
413 if (data && data[IFLA_IPVLAN_MODE]) {
414 u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
415
416 if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX)
417 return -EINVAL;
418 }
419 return 0;
420}
421
422static int ipvlan_nl_fillinfo(struct sk_buff *skb,
423 const struct net_device *dev)
424{
425 struct ipvl_dev *ipvlan = netdev_priv(dev);
426 struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
427 int ret = -EINVAL;
428
429 if (!port)
430 goto err;
431
432 ret = -EMSGSIZE;
433 if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
434 goto err;
435
436 return 0;
437
438err:
439 return ret;
440}
441
442static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
443 struct nlattr *tb[], struct nlattr *data[])
444{
445 struct ipvl_dev *ipvlan = netdev_priv(dev);
446 struct ipvl_port *port;
447 struct net_device *phy_dev;
448 int err;
e93fbc5a 449 u16 mode = IPVLAN_MODE_L3;
2ad7bf36
MB		 450
451 if (!tb[IFLA_LINK])
452 return -EINVAL;
453
454 phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
455 if (!phy_dev)
456 return -ENODEV;
457
5933fea7 458 if (netif_is_ipvlan(phy_dev)) {
2ad7bf36
MB		 459 struct ipvl_dev *tmp = netdev_priv(phy_dev);
460
461 phy_dev = tmp->phy_dev;
5933fea7 462 } else if (!netif_is_ipvlan_port(phy_dev)) {
2ad7bf36
MB		 463 err = ipvlan_port_create(phy_dev);
464 if (err < 0)
465 return err;
466 }
467
2ad7bf36 468 if (data && data[IFLA_IPVLAN_MODE])
e93fbc5a 469 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
2ad7bf36 470
e93fbc5a 471 port = ipvlan_port_get_rtnl(phy_dev);
2ad7bf36
MB		 472 ipvlan->phy_dev = phy_dev;
473 ipvlan->dev = dev;
474 ipvlan->port = port;
475 ipvlan->sfeatures = IPVLAN_FEATURES;
296d4856 476 ipvlan_adjust_mtu(ipvlan, phy_dev);
2ad7bf36 477 INIT_LIST_HEAD(&ipvlan->addrs);
2ad7bf36
MB		 478
479 /* TODO Probably put random address here to be presented to the
480 * world but keep using the physical-dev address for the outgoing
481 * packets.
482 */
483 memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
484
485 dev->priv_flags |= IFF_IPVLAN_SLAVE;
486
2ad7bf36
MB		 487 err = register_netdevice(dev);
488 if (err < 0)
494e8489 489 return err;
2ad7bf36
MB		 490
491 err = netdev_upper_dev_link(phy_dev, dev);
494e8489
MB		 492 if (err) {
493 unregister_netdevice(dev);
494 return err;
495 }
2ad7bf36
MB		 496
497 list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
e93fbc5a
MB		 498 ipvlan_set_port_mode(port, mode);
499
2ad7bf36
MB		 500 netif_stacked_transfer_operstate(phy_dev, dev);
501 return 0;
2ad7bf36
MB		 502}
503
504static void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
505{
506 struct ipvl_dev *ipvlan = netdev_priv(dev);
507 struct ipvl_addr *addr, *next;
508
515866f8 509 list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
6640e673 510 ipvlan_ht_addr_del(addr);
515866f8 511 list_del(&addr->anode);
6a725497 512 kfree_rcu(addr, rcu);
2ad7bf36 513 }
515866f8 514
2ad7bf36
MB		 515 list_del_rcu(&ipvlan->pnode);
516 unregister_netdevice_queue(dev, head);
517 netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
518}
519
520static void ipvlan_link_setup(struct net_device *dev)
521{
522 ether_setup(dev);
523
524 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
bf485bcf 525 dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE;
2ad7bf36
MB		 526 dev->netdev_ops = &ipvlan_netdev_ops;
527 dev->destructor = free_netdev;
528 dev->header_ops = &ipvlan_header_ops;
529 dev->ethtool_ops = &ipvlan_ethtool_ops;
2ad7bf36
MB		 530}
531
532static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
533{
534 [IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
535};
536
537static struct rtnl_link_ops ipvlan_link_ops = {
538 .kind = "ipvlan",
539 .priv_size = sizeof(struct ipvl_dev),
540
541 .get_size = ipvlan_nl_getsize,
542 .policy = ipvlan_nl_policy,
543 .validate = ipvlan_nl_validate,
544 .fill_info = ipvlan_nl_fillinfo,
545 .changelink = ipvlan_nl_changelink,
546 .maxtype = IFLA_IPVLAN_MAX,
547
548 .setup = ipvlan_link_setup,
549 .newlink = ipvlan_link_new,
550 .dellink = ipvlan_link_delete,
551};
552
92c7b0de 553static int ipvlan_link_register(struct rtnl_link_ops *ops)
2ad7bf36
MB		 554{
555 return rtnl_link_register(ops);
556}
557
558static int ipvlan_device_event(struct notifier_block *unused,
559 unsigned long event, void *ptr)
560{
561 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
562 struct ipvl_dev *ipvlan, *next;
563 struct ipvl_port *port;
564 LIST_HEAD(lst_kill);
565
5933fea7 566 if (!netif_is_ipvlan_port(dev))
2ad7bf36
MB		 567 return NOTIFY_DONE;
568
569 port = ipvlan_port_get_rtnl(dev);
570
571 switch (event) {
572 case NETDEV_CHANGE:
573 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
574 netif_stacked_transfer_operstate(ipvlan->phy_dev,
575 ipvlan->dev);
576 break;
577
578 case NETDEV_UNREGISTER:
579 if (dev->reg_state != NETREG_UNREGISTERING)
580 break;
581
582 list_for_each_entry_safe(ipvlan, next, &port->ipvlans,
583 pnode)
584 ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
585 &lst_kill);
586 unregister_netdevice_many(&lst_kill);
587 break;
588
589 case NETDEV_FEAT_CHANGE:
590 list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
591 ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
592 ipvlan->dev->gso_max_size = dev->gso_max_size;
f6773c5e 593 ipvlan->dev->gso_max_segs = dev->gso_max_segs;
2ad7bf36
MB		 594 netdev_features_change(ipvlan->dev);
595 }
596 break;
597
598 case NETDEV_CHANGEMTU:
599 list_for_each_entry(ipvlan, &port->ipvlans, pnode)
600 ipvlan_adjust_mtu(ipvlan, dev);
601 break;
602
603 case NETDEV_PRE_TYPE_CHANGE:
604 /* Forbid underlying device to change its type. */
605 return NOTIFY_BAD;
606 }
607 return NOTIFY_DONE;
608}
609
610static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
611{
612 struct ipvl_addr *addr;
613
e9997c29 614 if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
2ad7bf36
MB		 615 netif_err(ipvlan, ifup, ipvlan->dev,
616 "Failed to add IPv6=%pI6c addr for %s intf\n",
617 ip6_addr, ipvlan->dev->name);
618 return -EINVAL;
619 }
620 addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
621 if (!addr)
622 return -ENOMEM;
623
624 addr->master = ipvlan;
625 memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr));
626 addr->atype = IPVL_IPV6;
40891e8a 627 list_add_tail(&addr->anode, &ipvlan->addrs);
515866f8 628
27705f70
JB		 629 /* If the interface is not up, the address will be added to the hash
630 * list by ipvlan_open.
631 */
632 if (netif_running(ipvlan->dev))
633 ipvlan_ht_addr_add(ipvlan, addr);
2ad7bf36
MB		 634
635 return 0;
636}
637
638static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
639{
640 struct ipvl_addr *addr;
641
e9997c29 642 addr = ipvlan_find_addr(ipvlan, ip6_addr, true);
2ad7bf36
MB		 643 if (!addr)
644 return;
645
6640e673 646 ipvlan_ht_addr_del(addr);
40891e8a 647 list_del(&addr->anode);
2ad7bf36
MB		 648 kfree_rcu(addr, rcu);
649
650 return;
651}
652
653static int ipvlan_addr6_event(struct notifier_block *unused,
654 unsigned long event, void *ptr)
655{
656 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
657 struct net_device *dev = (struct net_device *)if6->idev->dev;
658 struct ipvl_dev *ipvlan = netdev_priv(dev);
659
23a5a49c
KK		 660 /* FIXME IPv6 autoconf calls us from bh without RTNL */
661 if (in_softirq())
662 return NOTIFY_DONE;
663
5933fea7 664 if (!netif_is_ipvlan(dev))
2ad7bf36
MB		 665 return NOTIFY_DONE;
666
667 if (!ipvlan || !ipvlan->port)
668 return NOTIFY_DONE;
669
670 switch (event) {
671 case NETDEV_UP:
672 if (ipvlan_add_addr6(ipvlan, &if6->addr))
673 return NOTIFY_BAD;
674 break;
675
676 case NETDEV_DOWN:
677 ipvlan_del_addr6(ipvlan, &if6->addr);
678 break;
679 }
680
681 return NOTIFY_OK;
682}
683
684static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
685{
686 struct ipvl_addr *addr;
687
e9997c29 688 if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) {
2ad7bf36
MB		 689 netif_err(ipvlan, ifup, ipvlan->dev,
690 "Failed to add IPv4=%pI4 on %s intf.\n",
691 ip4_addr, ipvlan->dev->name);
692 return -EINVAL;
693 }
694 addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL);
695 if (!addr)
696 return -ENOMEM;
697
698 addr->master = ipvlan;
699 memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr));
700 addr->atype = IPVL_IPV4;
40891e8a 701 list_add_tail(&addr->anode, &ipvlan->addrs);
515866f8 702
27705f70
JB		 703 /* If the interface is not up, the address will be added to the hash
704 * list by ipvlan_open.
705 */
706 if (netif_running(ipvlan->dev))
707 ipvlan_ht_addr_add(ipvlan, addr);
2ad7bf36
MB		 708
709 return 0;
710}
711
712static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
713{
714 struct ipvl_addr *addr;
715
e9997c29 716 addr = ipvlan_find_addr(ipvlan, ip4_addr, false);
2ad7bf36
MB		 717 if (!addr)
718 return;
719
6640e673 720 ipvlan_ht_addr_del(addr);
40891e8a 721 list_del(&addr->anode);
2ad7bf36
MB		 722 kfree_rcu(addr, rcu);
723
724 return;
725}
726
727static int ipvlan_addr4_event(struct notifier_block *unused,
728 unsigned long event, void *ptr)
729{
730 struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
731 struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
732 struct ipvl_dev *ipvlan = netdev_priv(dev);
733 struct in_addr ip4_addr;
734
5933fea7 735 if (!netif_is_ipvlan(dev))
2ad7bf36
MB		 736 return NOTIFY_DONE;
737
738 if (!ipvlan || !ipvlan->port)
739 return NOTIFY_DONE;
740
741 switch (event) {
742 case NETDEV_UP:
743 ip4_addr.s_addr = if4->ifa_address;
744 if (ipvlan_add_addr4(ipvlan, &ip4_addr))
745 return NOTIFY_BAD;
746 break;
747
748 case NETDEV_DOWN:
749 ip4_addr.s_addr = if4->ifa_address;
750 ipvlan_del_addr4(ipvlan, &ip4_addr);
751 break;
752 }
753
754 return NOTIFY_OK;
755}
756
757static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
758 .notifier_call = ipvlan_addr4_event,
759};
760
761static struct notifier_block ipvlan_notifier_block __read_mostly = {
762 .notifier_call = ipvlan_device_event,
763};
764
765static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
766 .notifier_call = ipvlan_addr6_event,
767};
768
769static int __init ipvlan_init_module(void)
770{
771 int err;
772
773 ipvlan_init_secret();
774 register_netdevice_notifier(&ipvlan_notifier_block);
775 register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
776 register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
777
778 err = ipvlan_link_register(&ipvlan_link_ops);
779 if (err < 0)
780 goto error;
781
782 return 0;
783error:
784 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
785 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
786 unregister_netdevice_notifier(&ipvlan_notifier_block);
787 return err;
788}
789
790static void __exit ipvlan_cleanup_module(void)
791{
792 rtnl_link_unregister(&ipvlan_link_ops);
793 unregister_netdevice_notifier(&ipvlan_notifier_block);
794 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
795 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
796}
797
798module_init(ipvlan_init_module);
799module_exit(ipvlan_cleanup_module);
800
801MODULE_LICENSE("GPL");
802MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
803MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
804MODULE_ALIAS_RTNL_LINK("ipvlan");
Linux kernel - Deliverables
This page took 0.231683 seconds and 5 git commands to generate.