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1 | // SPDX-License-Identifier: GPL-2.0-or-later | |
2 | /* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com> | |
3 | */ | |
4 | ||
5 | #include "ipvlan.h" | |
6 | ||
7 | static 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 | /* New mode is L3S */ | |
32 | err = ipvlan_l3s_register(port); | |
33 | if (err) | |
34 | goto fail; | |
35 | } else if (port->mode == IPVLAN_MODE_L3S) { | |
36 | /* Old mode was L3S */ | |
37 | ipvlan_l3s_unregister(port); | |
38 | } | |
39 | port->mode = nval; | |
40 | } | |
41 | return 0; | |
42 | ||
43 | fail: | |
44 | /* Undo the flags changes that have been done so far. */ | |
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 | ||
59 | static 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 | ||
86 | err: | |
87 | kfree(port); | |
88 | return err; | |
89 | } | |
90 | ||
91 | static 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_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
111 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_GSO_ROBUST | \ | |
112 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | 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 | ||
118 | static 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->gso_max_size = phy_dev->gso_max_size; | |
130 | dev->gso_max_segs = phy_dev->gso_max_segs; | |
131 | dev->hard_header_len = phy_dev->hard_header_len; | |
132 | ||
133 | netdev_lockdep_set_classes(dev); | |
134 | ||
135 | ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats); | |
136 | if (!ipvlan->pcpu_stats) | |
137 | return -ENOMEM; | |
138 | ||
139 | if (!netif_is_ipvlan_port(phy_dev)) { | |
140 | err = ipvlan_port_create(phy_dev); | |
141 | if (err < 0) { | |
142 | free_percpu(ipvlan->pcpu_stats); | |
143 | return err; | |
144 | } | |
145 | } | |
146 | port = ipvlan_port_get_rtnl(phy_dev); | |
147 | port->count += 1; | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static void ipvlan_uninit(struct net_device *dev) | |
152 | { | |
153 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
154 | struct net_device *phy_dev = ipvlan->phy_dev; | |
155 | struct ipvl_port *port; | |
156 | ||
157 | free_percpu(ipvlan->pcpu_stats); | |
158 | ||
159 | port = ipvlan_port_get_rtnl(phy_dev); | |
160 | port->count -= 1; | |
161 | if (!port->count) | |
162 | ipvlan_port_destroy(port->dev); | |
163 | } | |
164 | ||
165 | static int ipvlan_open(struct net_device *dev) | |
166 | { | |
167 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
168 | struct net_device *phy_dev = ipvlan->phy_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 dev_uc_add(phy_dev, phy_dev->dev_addr); | |
183 | } | |
184 | ||
185 | static 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 | dev_uc_del(phy_dev, phy_dev->dev_addr); | |
195 | ||
196 | rcu_read_lock(); | |
197 | list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) | |
198 | ipvlan_ht_addr_del(addr); | |
199 | rcu_read_unlock(); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, | |
205 | struct net_device *dev) | |
206 | { | |
207 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
208 | int skblen = skb->len; | |
209 | int ret; | |
210 | ||
211 | ret = ipvlan_queue_xmit(skb, dev); | |
212 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
213 | struct ipvl_pcpu_stats *pcptr; | |
214 | ||
215 | pcptr = this_cpu_ptr(ipvlan->pcpu_stats); | |
216 | ||
217 | u64_stats_update_begin(&pcptr->syncp); | |
218 | pcptr->tx_pkts++; | |
219 | pcptr->tx_bytes += skblen; | |
220 | u64_stats_update_end(&pcptr->syncp); | |
221 | } else { | |
222 | this_cpu_inc(ipvlan->pcpu_stats->tx_drps); | |
223 | } | |
224 | return ret; | |
225 | } | |
226 | ||
227 | static netdev_features_t ipvlan_fix_features(struct net_device *dev, | |
228 | netdev_features_t features) | |
229 | { | |
230 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
231 | ||
232 | return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES); | |
233 | } | |
234 | ||
235 | static void ipvlan_change_rx_flags(struct net_device *dev, int change) | |
236 | { | |
237 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
238 | struct net_device *phy_dev = ipvlan->phy_dev; | |
239 | ||
240 | if (change & IFF_ALLMULTI) | |
241 | dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1); | |
242 | } | |
243 | ||
244 | static void ipvlan_set_multicast_mac_filter(struct net_device *dev) | |
245 | { | |
246 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
247 | ||
248 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { | |
249 | bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE); | |
250 | } else { | |
251 | struct netdev_hw_addr *ha; | |
252 | DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
253 | ||
254 | bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
255 | netdev_for_each_mc_addr(ha, dev) | |
256 | __set_bit(ipvlan_mac_hash(ha->addr), mc_filters); | |
257 | ||
258 | /* Turn-on broadcast bit irrespective of address family, | |
259 | * since broadcast is deferred to a work-queue, hence no | |
260 | * impact on fast-path processing. | |
261 | */ | |
262 | __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters); | |
263 | ||
264 | bitmap_copy(ipvlan->mac_filters, mc_filters, | |
265 | IPVLAN_MAC_FILTER_SIZE); | |
266 | } | |
267 | dev_uc_sync(ipvlan->phy_dev, dev); | |
268 | dev_mc_sync(ipvlan->phy_dev, dev); | |
269 | } | |
270 | ||
271 | static void ipvlan_get_stats64(struct net_device *dev, | |
272 | struct rtnl_link_stats64 *s) | |
273 | { | |
274 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
275 | ||
276 | if (ipvlan->pcpu_stats) { | |
277 | struct ipvl_pcpu_stats *pcptr; | |
278 | u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes; | |
279 | u32 rx_errs = 0, tx_drps = 0; | |
280 | u32 strt; | |
281 | int idx; | |
282 | ||
283 | for_each_possible_cpu(idx) { | |
284 | pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx); | |
285 | do { | |
286 | strt= u64_stats_fetch_begin_irq(&pcptr->syncp); | |
287 | rx_pkts = pcptr->rx_pkts; | |
288 | rx_bytes = pcptr->rx_bytes; | |
289 | rx_mcast = pcptr->rx_mcast; | |
290 | tx_pkts = pcptr->tx_pkts; | |
291 | tx_bytes = pcptr->tx_bytes; | |
292 | } while (u64_stats_fetch_retry_irq(&pcptr->syncp, | |
293 | strt)); | |
294 | ||
295 | s->rx_packets += rx_pkts; | |
296 | s->rx_bytes += rx_bytes; | |
297 | s->multicast += rx_mcast; | |
298 | s->tx_packets += tx_pkts; | |
299 | s->tx_bytes += tx_bytes; | |
300 | ||
301 | /* u32 values are updated without syncp protection. */ | |
302 | rx_errs += pcptr->rx_errs; | |
303 | tx_drps += pcptr->tx_drps; | |
304 | } | |
305 | s->rx_errors = rx_errs; | |
306 | s->rx_dropped = rx_errs; | |
307 | s->tx_dropped = tx_drps; | |
308 | } | |
309 | } | |
310 | ||
311 | static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) | |
312 | { | |
313 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
314 | struct net_device *phy_dev = ipvlan->phy_dev; | |
315 | ||
316 | return vlan_vid_add(phy_dev, proto, vid); | |
317 | } | |
318 | ||
319 | static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, | |
320 | u16 vid) | |
321 | { | |
322 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
323 | struct net_device *phy_dev = ipvlan->phy_dev; | |
324 | ||
325 | vlan_vid_del(phy_dev, proto, vid); | |
326 | return 0; | |
327 | } | |
328 | ||
329 | static int ipvlan_get_iflink(const struct net_device *dev) | |
330 | { | |
331 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
332 | ||
333 | return ipvlan->phy_dev->ifindex; | |
334 | } | |
335 | ||
336 | static const struct net_device_ops ipvlan_netdev_ops = { | |
337 | .ndo_init = ipvlan_init, | |
338 | .ndo_uninit = ipvlan_uninit, | |
339 | .ndo_open = ipvlan_open, | |
340 | .ndo_stop = ipvlan_stop, | |
341 | .ndo_start_xmit = ipvlan_start_xmit, | |
342 | .ndo_fix_features = ipvlan_fix_features, | |
343 | .ndo_change_rx_flags = ipvlan_change_rx_flags, | |
344 | .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter, | |
345 | .ndo_get_stats64 = ipvlan_get_stats64, | |
346 | .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid, | |
347 | .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid, | |
348 | .ndo_get_iflink = ipvlan_get_iflink, | |
349 | }; | |
350 | ||
351 | static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
352 | unsigned short type, const void *daddr, | |
353 | const void *saddr, unsigned len) | |
354 | { | |
355 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
356 | struct net_device *phy_dev = ipvlan->phy_dev; | |
357 | ||
358 | /* TODO Probably use a different field than dev_addr so that the | |
359 | * mac-address on the virtual device is portable and can be carried | |
360 | * while the packets use the mac-addr on the physical device. | |
361 | */ | |
362 | return dev_hard_header(skb, phy_dev, type, daddr, | |
363 | saddr ? : phy_dev->dev_addr, len); | |
364 | } | |
365 | ||
366 | static const struct header_ops ipvlan_header_ops = { | |
367 | .create = ipvlan_hard_header, | |
368 | .parse = eth_header_parse, | |
369 | .cache = eth_header_cache, | |
370 | .cache_update = eth_header_cache_update, | |
371 | }; | |
372 | ||
373 | static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev) | |
374 | { | |
375 | ipvlan->dev->mtu = dev->mtu; | |
376 | } | |
377 | ||
378 | static bool netif_is_ipvlan(const struct net_device *dev) | |
379 | { | |
380 | /* both ipvlan and ipvtap devices use the same netdev_ops */ | |
381 | return dev->netdev_ops == &ipvlan_netdev_ops; | |
382 | } | |
383 | ||
384 | static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev, | |
385 | struct ethtool_link_ksettings *cmd) | |
386 | { | |
387 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
388 | ||
389 | return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd); | |
390 | } | |
391 | ||
392 | static void ipvlan_ethtool_get_drvinfo(struct net_device *dev, | |
393 | struct ethtool_drvinfo *drvinfo) | |
394 | { | |
395 | strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver)); | |
396 | strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version)); | |
397 | } | |
398 | ||
399 | static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev) | |
400 | { | |
401 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
402 | ||
403 | return ipvlan->msg_enable; | |
404 | } | |
405 | ||
406 | static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value) | |
407 | { | |
408 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
409 | ||
410 | ipvlan->msg_enable = value; | |
411 | } | |
412 | ||
413 | static const struct ethtool_ops ipvlan_ethtool_ops = { | |
414 | .get_link = ethtool_op_get_link, | |
415 | .get_link_ksettings = ipvlan_ethtool_get_link_ksettings, | |
416 | .get_drvinfo = ipvlan_ethtool_get_drvinfo, | |
417 | .get_msglevel = ipvlan_ethtool_get_msglevel, | |
418 | .set_msglevel = ipvlan_ethtool_set_msglevel, | |
419 | }; | |
420 | ||
421 | static int ipvlan_nl_changelink(struct net_device *dev, | |
422 | struct nlattr *tb[], struct nlattr *data[], | |
423 | struct netlink_ext_ack *extack) | |
424 | { | |
425 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
426 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
427 | int err = 0; | |
428 | ||
429 | if (!data) | |
430 | return 0; | |
431 | if (!ns_capable(dev_net(ipvlan->phy_dev)->user_ns, CAP_NET_ADMIN)) | |
432 | return -EPERM; | |
433 | ||
434 | if (data[IFLA_IPVLAN_MODE]) { | |
435 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
436 | ||
437 | err = ipvlan_set_port_mode(port, nmode, extack); | |
438 | } | |
439 | ||
440 | if (!err && data[IFLA_IPVLAN_FLAGS]) { | |
441 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
442 | ||
443 | if (flags & IPVLAN_F_PRIVATE) | |
444 | ipvlan_mark_private(port); | |
445 | else | |
446 | ipvlan_clear_private(port); | |
447 | ||
448 | if (flags & IPVLAN_F_VEPA) | |
449 | ipvlan_mark_vepa(port); | |
450 | else | |
451 | ipvlan_clear_vepa(port); | |
452 | } | |
453 | ||
454 | return err; | |
455 | } | |
456 | ||
457 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
458 | { | |
459 | return (0 | |
460 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
461 | + nla_total_size(2) /* IFLA_IPVLAN_FLAGS */ | |
462 | ); | |
463 | } | |
464 | ||
465 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[], | |
466 | struct netlink_ext_ack *extack) | |
467 | { | |
468 | if (!data) | |
469 | return 0; | |
470 | ||
471 | if (data[IFLA_IPVLAN_MODE]) { | |
472 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
473 | ||
474 | if (mode >= IPVLAN_MODE_MAX) | |
475 | return -EINVAL; | |
476 | } | |
477 | if (data[IFLA_IPVLAN_FLAGS]) { | |
478 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
479 | ||
480 | /* Only two bits are used at this moment. */ | |
481 | if (flags & ~(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
482 | return -EINVAL; | |
483 | /* Also both flags can't be active at the same time. */ | |
484 | if ((flags & (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) == | |
485 | (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
486 | return -EINVAL; | |
487 | } | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
493 | const struct net_device *dev) | |
494 | { | |
495 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
496 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
497 | int ret = -EINVAL; | |
498 | ||
499 | if (!port) | |
500 | goto err; | |
501 | ||
502 | ret = -EMSGSIZE; | |
503 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
504 | goto err; | |
505 | if (nla_put_u16(skb, IFLA_IPVLAN_FLAGS, port->flags)) | |
506 | goto err; | |
507 | ||
508 | return 0; | |
509 | ||
510 | err: | |
511 | return ret; | |
512 | } | |
513 | ||
514 | int ipvlan_link_new(struct net *src_net, struct net_device *dev, | |
515 | struct nlattr *tb[], struct nlattr *data[], | |
516 | struct netlink_ext_ack *extack) | |
517 | { | |
518 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
519 | struct ipvl_port *port; | |
520 | struct net_device *phy_dev; | |
521 | int err; | |
522 | u16 mode = IPVLAN_MODE_L3; | |
523 | ||
524 | if (!tb[IFLA_LINK]) | |
525 | return -EINVAL; | |
526 | ||
527 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
528 | if (!phy_dev) | |
529 | return -ENODEV; | |
530 | ||
531 | if (netif_is_ipvlan(phy_dev)) { | |
532 | struct ipvl_dev *tmp = netdev_priv(phy_dev); | |
533 | ||
534 | phy_dev = tmp->phy_dev; | |
535 | if (!ns_capable(dev_net(phy_dev)->user_ns, CAP_NET_ADMIN)) | |
536 | return -EPERM; | |
537 | } else if (!netif_is_ipvlan_port(phy_dev)) { | |
538 | /* Exit early if the underlying link is invalid or busy */ | |
539 | if (phy_dev->type != ARPHRD_ETHER || | |
540 | phy_dev->flags & IFF_LOOPBACK) { | |
541 | netdev_err(phy_dev, | |
542 | "Master is either lo or non-ether device\n"); | |
543 | return -EINVAL; | |
544 | } | |
545 | ||
546 | if (netdev_is_rx_handler_busy(phy_dev)) { | |
547 | netdev_err(phy_dev, "Device is already in use.\n"); | |
548 | return -EBUSY; | |
549 | } | |
550 | } | |
551 | ||
552 | ipvlan->phy_dev = phy_dev; | |
553 | ipvlan->dev = dev; | |
554 | ipvlan->sfeatures = IPVLAN_FEATURES; | |
555 | if (!tb[IFLA_MTU]) | |
556 | ipvlan_adjust_mtu(ipvlan, phy_dev); | |
557 | INIT_LIST_HEAD(&ipvlan->addrs); | |
558 | spin_lock_init(&ipvlan->addrs_lock); | |
559 | ||
560 | /* TODO Probably put random address here to be presented to the | |
561 | * world but keep using the physical-dev address for the outgoing | |
562 | * packets. | |
563 | */ | |
564 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); | |
565 | ||
566 | dev->priv_flags |= IFF_NO_RX_HANDLER; | |
567 | ||
568 | err = register_netdevice(dev); | |
569 | if (err < 0) | |
570 | return err; | |
571 | ||
572 | /* ipvlan_init() would have created the port, if required */ | |
573 | port = ipvlan_port_get_rtnl(phy_dev); | |
574 | ipvlan->port = port; | |
575 | ||
576 | /* If the port-id base is at the MAX value, then wrap it around and | |
577 | * begin from 0x1 again. This may be due to a busy system where lots | |
578 | * of slaves are getting created and deleted. | |
579 | */ | |
580 | if (port->dev_id_start == 0xFFFE) | |
581 | port->dev_id_start = 0x1; | |
582 | ||
583 | /* Since L2 address is shared among all IPvlan slaves including | |
584 | * master, use unique 16 bit dev-ids to diffentiate among them. | |
585 | * Assign IDs between 0x1 and 0xFFFE (used by the master) to each | |
586 | * slave link [see addrconf_ifid_eui48()]. | |
587 | */ | |
588 | err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE, | |
589 | GFP_KERNEL); | |
590 | if (err < 0) | |
591 | err = ida_simple_get(&port->ida, 0x1, port->dev_id_start, | |
592 | GFP_KERNEL); | |
593 | if (err < 0) | |
594 | goto unregister_netdev; | |
595 | dev->dev_id = err; | |
596 | ||
597 | /* Increment id-base to the next slot for the future assignment */ | |
598 | port->dev_id_start = err + 1; | |
599 | ||
600 | err = netdev_upper_dev_link(phy_dev, dev, extack); | |
601 | if (err) | |
602 | goto remove_ida; | |
603 | ||
604 | /* Flags are per port and latest update overrides. User has | |
605 | * to be consistent in setting it just like the mode attribute. | |
606 | */ | |
607 | if (data && data[IFLA_IPVLAN_FLAGS]) | |
608 | port->flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
609 | ||
610 | if (data && data[IFLA_IPVLAN_MODE]) | |
611 | mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
612 | ||
613 | err = ipvlan_set_port_mode(port, mode, extack); | |
614 | if (err) | |
615 | goto unlink_netdev; | |
616 | ||
617 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
618 | netif_stacked_transfer_operstate(phy_dev, dev); | |
619 | return 0; | |
620 | ||
621 | unlink_netdev: | |
622 | netdev_upper_dev_unlink(phy_dev, dev); | |
623 | remove_ida: | |
624 | ida_simple_remove(&port->ida, dev->dev_id); | |
625 | unregister_netdev: | |
626 | unregister_netdevice(dev); | |
627 | return err; | |
628 | } | |
629 | EXPORT_SYMBOL_GPL(ipvlan_link_new); | |
630 | ||
631 | void ipvlan_link_delete(struct net_device *dev, struct list_head *head) | |
632 | { | |
633 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
634 | struct ipvl_addr *addr, *next; | |
635 | ||
636 | spin_lock_bh(&ipvlan->addrs_lock); | |
637 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { | |
638 | ipvlan_ht_addr_del(addr); | |
639 | list_del_rcu(&addr->anode); | |
640 | kfree_rcu(addr, rcu); | |
641 | } | |
642 | spin_unlock_bh(&ipvlan->addrs_lock); | |
643 | ||
644 | ida_simple_remove(&ipvlan->port->ida, dev->dev_id); | |
645 | list_del_rcu(&ipvlan->pnode); | |
646 | unregister_netdevice_queue(dev, head); | |
647 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
648 | } | |
649 | EXPORT_SYMBOL_GPL(ipvlan_link_delete); | |
650 | ||
651 | void ipvlan_link_setup(struct net_device *dev) | |
652 | { | |
653 | ether_setup(dev); | |
654 | ||
655 | dev->max_mtu = ETH_MAX_MTU; | |
656 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); | |
657 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE; | |
658 | dev->netdev_ops = &ipvlan_netdev_ops; | |
659 | dev->needs_free_netdev = true; | |
660 | dev->header_ops = &ipvlan_header_ops; | |
661 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
662 | } | |
663 | EXPORT_SYMBOL_GPL(ipvlan_link_setup); | |
664 | ||
665 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
666 | { | |
667 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
668 | [IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 }, | |
669 | }; | |
670 | ||
671 | static struct rtnl_link_ops ipvlan_link_ops = { | |
672 | .kind = "ipvlan", | |
673 | .priv_size = sizeof(struct ipvl_dev), | |
674 | ||
675 | .setup = ipvlan_link_setup, | |
676 | .newlink = ipvlan_link_new, | |
677 | .dellink = ipvlan_link_delete, | |
678 | }; | |
679 | ||
680 | int ipvlan_link_register(struct rtnl_link_ops *ops) | |
681 | { | |
682 | ops->get_size = ipvlan_nl_getsize; | |
683 | ops->policy = ipvlan_nl_policy; | |
684 | ops->validate = ipvlan_nl_validate; | |
685 | ops->fill_info = ipvlan_nl_fillinfo; | |
686 | ops->changelink = ipvlan_nl_changelink; | |
687 | ops->maxtype = IFLA_IPVLAN_MAX; | |
688 | return rtnl_link_register(ops); | |
689 | } | |
690 | EXPORT_SYMBOL_GPL(ipvlan_link_register); | |
691 | ||
692 | static int ipvlan_device_event(struct notifier_block *unused, | |
693 | unsigned long event, void *ptr) | |
694 | { | |
695 | struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); | |
696 | struct netdev_notifier_pre_changeaddr_info *prechaddr_info; | |
697 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
698 | struct ipvl_dev *ipvlan, *next; | |
699 | struct ipvl_port *port; | |
700 | LIST_HEAD(lst_kill); | |
701 | int err; | |
702 | ||
703 | if (!netif_is_ipvlan_port(dev)) | |
704 | return NOTIFY_DONE; | |
705 | ||
706 | port = ipvlan_port_get_rtnl(dev); | |
707 | ||
708 | switch (event) { | |
709 | case NETDEV_CHANGE: | |
710 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
711 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
712 | ipvlan->dev); | |
713 | break; | |
714 | ||
715 | case NETDEV_REGISTER: { | |
716 | struct net *oldnet, *newnet = dev_net(dev); | |
717 | ||
718 | oldnet = read_pnet(&port->pnet); | |
719 | if (net_eq(newnet, oldnet)) | |
720 | break; | |
721 | ||
722 | write_pnet(&port->pnet, newnet); | |
723 | ||
724 | ipvlan_migrate_l3s_hook(oldnet, newnet); | |
725 | break; | |
726 | } | |
727 | case NETDEV_UNREGISTER: | |
728 | if (dev->reg_state != NETREG_UNREGISTERING) | |
729 | break; | |
730 | ||
731 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, pnode) | |
732 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, | |
733 | &lst_kill); | |
734 | unregister_netdevice_many(&lst_kill); | |
735 | break; | |
736 | ||
737 | case NETDEV_FEAT_CHANGE: | |
738 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
739 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
740 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
741 | ipvlan->dev->gso_max_segs = dev->gso_max_segs; | |
742 | netdev_features_change(ipvlan->dev); | |
743 | } | |
744 | break; | |
745 | ||
746 | case NETDEV_CHANGEMTU: | |
747 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
748 | ipvlan_adjust_mtu(ipvlan, dev); | |
749 | break; | |
750 | ||
751 | case NETDEV_PRE_CHANGEADDR: | |
752 | prechaddr_info = ptr; | |
753 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
754 | err = dev_pre_changeaddr_notify(ipvlan->dev, | |
755 | prechaddr_info->dev_addr, | |
756 | extack); | |
757 | if (err) | |
758 | return notifier_from_errno(err); | |
759 | } | |
760 | break; | |
761 | ||
762 | case NETDEV_CHANGEADDR: | |
763 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
764 | ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr); | |
765 | call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev); | |
766 | } | |
767 | break; | |
768 | ||
769 | case NETDEV_PRE_TYPE_CHANGE: | |
770 | /* Forbid underlying device to change its type. */ | |
771 | return NOTIFY_BAD; | |
772 | } | |
773 | return NOTIFY_DONE; | |
774 | } | |
775 | ||
776 | /* the caller must held the addrs lock */ | |
777 | static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) | |
778 | { | |
779 | struct ipvl_addr *addr; | |
780 | ||
781 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); | |
782 | if (!addr) | |
783 | return -ENOMEM; | |
784 | ||
785 | addr->master = ipvlan; | |
786 | if (!is_v6) { | |
787 | memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr)); | |
788 | addr->atype = IPVL_IPV4; | |
789 | #if IS_ENABLED(CONFIG_IPV6) | |
790 | } else { | |
791 | memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr)); | |
792 | addr->atype = IPVL_IPV6; | |
793 | #endif | |
794 | } | |
795 | ||
796 | list_add_tail_rcu(&addr->anode, &ipvlan->addrs); | |
797 | ||
798 | /* If the interface is not up, the address will be added to the hash | |
799 | * list by ipvlan_open. | |
800 | */ | |
801 | if (netif_running(ipvlan->dev)) | |
802 | ipvlan_ht_addr_add(ipvlan, addr); | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) | |
808 | { | |
809 | struct ipvl_addr *addr; | |
810 | ||
811 | spin_lock_bh(&ipvlan->addrs_lock); | |
812 | addr = ipvlan_find_addr(ipvlan, iaddr, is_v6); | |
813 | if (!addr) { | |
814 | spin_unlock_bh(&ipvlan->addrs_lock); | |
815 | return; | |
816 | } | |
817 | ||
818 | ipvlan_ht_addr_del(addr); | |
819 | list_del_rcu(&addr->anode); | |
820 | spin_unlock_bh(&ipvlan->addrs_lock); | |
821 | kfree_rcu(addr, rcu); | |
822 | } | |
823 | ||
824 | static bool ipvlan_is_valid_dev(const struct net_device *dev) | |
825 | { | |
826 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
827 | ||
828 | if (!netif_is_ipvlan(dev)) | |
829 | return false; | |
830 | ||
831 | if (!ipvlan || !ipvlan->port) | |
832 | return false; | |
833 | ||
834 | return true; | |
835 | } | |
836 | ||
837 | #if IS_ENABLED(CONFIG_IPV6) | |
838 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
839 | { | |
840 | int ret = -EINVAL; | |
841 | ||
842 | spin_lock_bh(&ipvlan->addrs_lock); | |
843 | if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) | |
844 | netif_err(ipvlan, ifup, ipvlan->dev, | |
845 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
846 | ip6_addr, ipvlan->dev->name); | |
847 | else | |
848 | ret = ipvlan_add_addr(ipvlan, ip6_addr, true); | |
849 | spin_unlock_bh(&ipvlan->addrs_lock); | |
850 | return ret; | |
851 | } | |
852 | ||
853 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
854 | { | |
855 | return ipvlan_del_addr(ipvlan, ip6_addr, true); | |
856 | } | |
857 | ||
858 | static int ipvlan_addr6_event(struct notifier_block *unused, | |
859 | unsigned long event, void *ptr) | |
860 | { | |
861 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
862 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
863 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
864 | ||
865 | if (!ipvlan_is_valid_dev(dev)) | |
866 | return NOTIFY_DONE; | |
867 | ||
868 | switch (event) { | |
869 | case NETDEV_UP: | |
870 | if (ipvlan_add_addr6(ipvlan, &if6->addr)) | |
871 | return NOTIFY_BAD; | |
872 | break; | |
873 | ||
874 | case NETDEV_DOWN: | |
875 | ipvlan_del_addr6(ipvlan, &if6->addr); | |
876 | break; | |
877 | } | |
878 | ||
879 | return NOTIFY_OK; | |
880 | } | |
881 | ||
882 | static int ipvlan_addr6_validator_event(struct notifier_block *unused, | |
883 | unsigned long event, void *ptr) | |
884 | { | |
885 | struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr; | |
886 | struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev; | |
887 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
888 | ||
889 | if (!ipvlan_is_valid_dev(dev)) | |
890 | return NOTIFY_DONE; | |
891 | ||
892 | switch (event) { | |
893 | case NETDEV_UP: | |
894 | if (ipvlan_addr_busy(ipvlan->port, &i6vi->i6vi_addr, true)) { | |
895 | NL_SET_ERR_MSG(i6vi->extack, | |
896 | "Address already assigned to an ipvlan device"); | |
897 | return notifier_from_errno(-EADDRINUSE); | |
898 | } | |
899 | break; | |
900 | } | |
901 | ||
902 | return NOTIFY_OK; | |
903 | } | |
904 | #endif | |
905 | ||
906 | static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
907 | { | |
908 | int ret = -EINVAL; | |
909 | ||
910 | spin_lock_bh(&ipvlan->addrs_lock); | |
911 | if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) | |
912 | netif_err(ipvlan, ifup, ipvlan->dev, | |
913 | "Failed to add IPv4=%pI4 on %s intf.\n", | |
914 | ip4_addr, ipvlan->dev->name); | |
915 | else | |
916 | ret = ipvlan_add_addr(ipvlan, ip4_addr, false); | |
917 | spin_unlock_bh(&ipvlan->addrs_lock); | |
918 | return ret; | |
919 | } | |
920 | ||
921 | static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
922 | { | |
923 | return ipvlan_del_addr(ipvlan, ip4_addr, false); | |
924 | } | |
925 | ||
926 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
927 | unsigned long event, void *ptr) | |
928 | { | |
929 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
930 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
931 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
932 | struct in_addr ip4_addr; | |
933 | ||
934 | if (!ipvlan_is_valid_dev(dev)) | |
935 | return NOTIFY_DONE; | |
936 | ||
937 | switch (event) { | |
938 | case NETDEV_UP: | |
939 | ip4_addr.s_addr = if4->ifa_address; | |
940 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
941 | return NOTIFY_BAD; | |
942 | break; | |
943 | ||
944 | case NETDEV_DOWN: | |
945 | ip4_addr.s_addr = if4->ifa_address; | |
946 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
947 | break; | |
948 | } | |
949 | ||
950 | return NOTIFY_OK; | |
951 | } | |
952 | ||
953 | static int ipvlan_addr4_validator_event(struct notifier_block *unused, | |
954 | unsigned long event, void *ptr) | |
955 | { | |
956 | struct in_validator_info *ivi = (struct in_validator_info *)ptr; | |
957 | struct net_device *dev = (struct net_device *)ivi->ivi_dev->dev; | |
958 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
959 | ||
960 | if (!ipvlan_is_valid_dev(dev)) | |
961 | return NOTIFY_DONE; | |
962 | ||
963 | switch (event) { | |
964 | case NETDEV_UP: | |
965 | if (ipvlan_addr_busy(ipvlan->port, &ivi->ivi_addr, false)) { | |
966 | NL_SET_ERR_MSG(ivi->extack, | |
967 | "Address already assigned to an ipvlan device"); | |
968 | return notifier_from_errno(-EADDRINUSE); | |
969 | } | |
970 | break; | |
971 | } | |
972 | ||
973 | return NOTIFY_OK; | |
974 | } | |
975 | ||
976 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { | |
977 | .notifier_call = ipvlan_addr4_event, | |
978 | }; | |
979 | ||
980 | static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly = { | |
981 | .notifier_call = ipvlan_addr4_validator_event, | |
982 | }; | |
983 | ||
984 | static struct notifier_block ipvlan_notifier_block __read_mostly = { | |
985 | .notifier_call = ipvlan_device_event, | |
986 | }; | |
987 | ||
988 | #if IS_ENABLED(CONFIG_IPV6) | |
989 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { | |
990 | .notifier_call = ipvlan_addr6_event, | |
991 | }; | |
992 | ||
993 | static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = { | |
994 | .notifier_call = ipvlan_addr6_validator_event, | |
995 | }; | |
996 | #endif | |
997 | ||
998 | static int __init ipvlan_init_module(void) | |
999 | { | |
1000 | int err; | |
1001 | ||
1002 | ipvlan_init_secret(); | |
1003 | register_netdevice_notifier(&ipvlan_notifier_block); | |
1004 | #if IS_ENABLED(CONFIG_IPV6) | |
1005 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
1006 | register_inet6addr_validator_notifier( | |
1007 | &ipvlan_addr6_vtor_notifier_block); | |
1008 | #endif | |
1009 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
1010 | register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block); | |
1011 | ||
1012 | err = ipvlan_l3s_init(); | |
1013 | if (err < 0) | |
1014 | goto error; | |
1015 | ||
1016 | err = ipvlan_link_register(&ipvlan_link_ops); | |
1017 | if (err < 0) { | |
1018 | ipvlan_l3s_cleanup(); | |
1019 | goto error; | |
1020 | } | |
1021 | ||
1022 | return 0; | |
1023 | error: | |
1024 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
1025 | unregister_inetaddr_validator_notifier( | |
1026 | &ipvlan_addr4_vtor_notifier_block); | |
1027 | #if IS_ENABLED(CONFIG_IPV6) | |
1028 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
1029 | unregister_inet6addr_validator_notifier( | |
1030 | &ipvlan_addr6_vtor_notifier_block); | |
1031 | #endif | |
1032 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
1033 | return err; | |
1034 | } | |
1035 | ||
1036 | static void __exit ipvlan_cleanup_module(void) | |
1037 | { | |
1038 | rtnl_link_unregister(&ipvlan_link_ops); | |
1039 | ipvlan_l3s_cleanup(); | |
1040 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
1041 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
1042 | unregister_inetaddr_validator_notifier( | |
1043 | &ipvlan_addr4_vtor_notifier_block); | |
1044 | #if IS_ENABLED(CONFIG_IPV6) | |
1045 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
1046 | unregister_inet6addr_validator_notifier( | |
1047 | &ipvlan_addr6_vtor_notifier_block); | |
1048 | #endif | |
1049 | } | |
1050 | ||
1051 | module_init(ipvlan_init_module); | |
1052 | module_exit(ipvlan_cleanup_module); | |
1053 | ||
1054 | MODULE_LICENSE("GPL"); | |
1055 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
1056 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
1057 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |