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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 | ||
12 | void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev) | |
13 | { | |
14 | ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj; | |
15 | } | |
16 | ||
17 | void ipvlan_set_port_mode(struct ipvl_port *port, u32 nval) | |
18 | { | |
19 | struct ipvl_dev *ipvlan; | |
20 | ||
21 | if (port->mode != nval) { | |
22 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
23 | if (nval == IPVLAN_MODE_L3) | |
24 | ipvlan->dev->flags |= IFF_NOARP; | |
25 | else | |
26 | ipvlan->dev->flags &= ~IFF_NOARP; | |
27 | } | |
28 | port->mode = nval; | |
29 | } | |
30 | } | |
31 | ||
32 | static 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 | ||
67 | err: | |
68 | kfree_rcu(port, rcu); | |
69 | return err; | |
70 | } | |
71 | ||
72 | static 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 | */ | |
87 | static struct lock_class_key ipvlan_netdev_xmit_lock_key; | |
88 | static struct lock_class_key ipvlan_netdev_addr_lock_key; | |
89 | ||
90 | #define IPVLAN_FEATURES \ | |
91 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
92 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
93 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ | |
94 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) | |
95 | ||
96 | #define IPVLAN_STATE_MASK \ | |
97 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
98 | ||
99 | static 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 | ||
106 | static 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 | ||
112 | static int ipvlan_init(struct net_device *dev) | |
113 | { | |
114 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
115 | const struct net_device *phy_dev = ipvlan->phy_dev; | |
116 | ||
117 | dev->state = (dev->state & ~IPVLAN_STATE_MASK) | | |
118 | (phy_dev->state & IPVLAN_STATE_MASK); | |
119 | dev->features = phy_dev->features & IPVLAN_FEATURES; | |
120 | dev->features |= NETIF_F_LLTX; | |
121 | dev->gso_max_size = phy_dev->gso_max_size; | |
2ad7bf36 MB |
122 | dev->hard_header_len = phy_dev->hard_header_len; |
123 | ||
124 | ipvlan_set_lockdep_class(dev); | |
125 | ||
126 | ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats); | |
127 | if (!ipvlan->pcpu_stats) | |
128 | return -ENOMEM; | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | static void ipvlan_uninit(struct net_device *dev) | |
134 | { | |
135 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
136 | struct ipvl_port *port = ipvlan->port; | |
137 | ||
04901cea | 138 | free_percpu(ipvlan->pcpu_stats); |
2ad7bf36 MB |
139 | |
140 | port->count -= 1; | |
141 | if (!port->count) | |
142 | ipvlan_port_destroy(port->dev); | |
143 | } | |
144 | ||
145 | static int ipvlan_open(struct net_device *dev) | |
146 | { | |
147 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
148 | struct net_device *phy_dev = ipvlan->phy_dev; | |
149 | struct ipvl_addr *addr; | |
150 | ||
151 | if (ipvlan->port->mode == IPVLAN_MODE_L3) | |
152 | dev->flags |= IFF_NOARP; | |
153 | else | |
154 | dev->flags &= ~IFF_NOARP; | |
155 | ||
156 | if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) { | |
157 | list_for_each_entry(addr, &ipvlan->addrs, anode) | |
158 | ipvlan_ht_addr_add(ipvlan, addr); | |
159 | } | |
160 | return dev_uc_add(phy_dev, phy_dev->dev_addr); | |
161 | } | |
162 | ||
163 | static int ipvlan_stop(struct net_device *dev) | |
164 | { | |
165 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
166 | struct net_device *phy_dev = ipvlan->phy_dev; | |
167 | struct ipvl_addr *addr; | |
168 | ||
169 | dev_uc_unsync(phy_dev, dev); | |
170 | dev_mc_unsync(phy_dev, dev); | |
171 | ||
172 | dev_uc_del(phy_dev, phy_dev->dev_addr); | |
173 | ||
174 | if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) { | |
175 | list_for_each_entry(addr, &ipvlan->addrs, anode) | |
176 | ipvlan_ht_addr_del(addr, !dev->dismantle); | |
177 | } | |
178 | return 0; | |
179 | } | |
180 | ||
92c7b0de MB |
181 | static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, |
182 | struct net_device *dev) | |
2ad7bf36 MB |
183 | { |
184 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
185 | int skblen = skb->len; | |
186 | int ret; | |
187 | ||
188 | ret = ipvlan_queue_xmit(skb, dev); | |
189 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
190 | struct ipvl_pcpu_stats *pcptr; | |
191 | ||
192 | pcptr = this_cpu_ptr(ipvlan->pcpu_stats); | |
193 | ||
194 | u64_stats_update_begin(&pcptr->syncp); | |
195 | pcptr->tx_pkts++; | |
196 | pcptr->tx_bytes += skblen; | |
197 | u64_stats_update_end(&pcptr->syncp); | |
198 | } else { | |
199 | this_cpu_inc(ipvlan->pcpu_stats->tx_drps); | |
200 | } | |
201 | return ret; | |
202 | } | |
203 | ||
204 | static netdev_features_t ipvlan_fix_features(struct net_device *dev, | |
205 | netdev_features_t features) | |
206 | { | |
207 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
208 | ||
209 | return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES); | |
210 | } | |
211 | ||
212 | static void ipvlan_change_rx_flags(struct net_device *dev, int change) | |
213 | { | |
214 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
215 | struct net_device *phy_dev = ipvlan->phy_dev; | |
216 | ||
217 | if (change & IFF_ALLMULTI) | |
218 | dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1); | |
219 | } | |
220 | ||
2ad7bf36 MB |
221 | static void ipvlan_set_multicast_mac_filter(struct net_device *dev) |
222 | { | |
223 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
224 | ||
225 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { | |
226 | bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE); | |
227 | } else { | |
228 | struct netdev_hw_addr *ha; | |
229 | DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
230 | ||
231 | bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
232 | netdev_for_each_mc_addr(ha, dev) | |
233 | __set_bit(ipvlan_mac_hash(ha->addr), mc_filters); | |
234 | ||
f631c44b MB |
235 | /* Turn-on broadcast bit irrespective of address family, |
236 | * since broadcast is deferred to a work-queue, hence no | |
237 | * impact on fast-path processing. | |
238 | */ | |
239 | __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters); | |
240 | ||
2ad7bf36 MB |
241 | bitmap_copy(ipvlan->mac_filters, mc_filters, |
242 | IPVLAN_MAC_FILTER_SIZE); | |
243 | } | |
244 | dev_uc_sync(ipvlan->phy_dev, dev); | |
245 | dev_mc_sync(ipvlan->phy_dev, dev); | |
246 | } | |
247 | ||
248 | static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev, | |
249 | struct rtnl_link_stats64 *s) | |
250 | { | |
251 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
252 | ||
253 | if (ipvlan->pcpu_stats) { | |
254 | struct ipvl_pcpu_stats *pcptr; | |
255 | u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes; | |
256 | u32 rx_errs = 0, tx_drps = 0; | |
257 | u32 strt; | |
258 | int idx; | |
259 | ||
260 | for_each_possible_cpu(idx) { | |
261 | pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx); | |
262 | do { | |
263 | strt= u64_stats_fetch_begin_irq(&pcptr->syncp); | |
264 | rx_pkts = pcptr->rx_pkts; | |
265 | rx_bytes = pcptr->rx_bytes; | |
266 | rx_mcast = pcptr->rx_mcast; | |
267 | tx_pkts = pcptr->tx_pkts; | |
268 | tx_bytes = pcptr->tx_bytes; | |
269 | } while (u64_stats_fetch_retry_irq(&pcptr->syncp, | |
270 | strt)); | |
271 | ||
272 | s->rx_packets += rx_pkts; | |
273 | s->rx_bytes += rx_bytes; | |
274 | s->multicast += rx_mcast; | |
275 | s->tx_packets += tx_pkts; | |
276 | s->tx_bytes += tx_bytes; | |
277 | ||
278 | /* u32 values are updated without syncp protection. */ | |
279 | rx_errs += pcptr->rx_errs; | |
280 | tx_drps += pcptr->tx_drps; | |
281 | } | |
282 | s->rx_errors = rx_errs; | |
283 | s->rx_dropped = rx_errs; | |
284 | s->tx_dropped = tx_drps; | |
285 | } | |
286 | return s; | |
287 | } | |
288 | ||
289 | static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) | |
290 | { | |
291 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
292 | struct net_device *phy_dev = ipvlan->phy_dev; | |
293 | ||
294 | return vlan_vid_add(phy_dev, proto, vid); | |
295 | } | |
296 | ||
297 | static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, | |
298 | u16 vid) | |
299 | { | |
300 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
301 | struct net_device *phy_dev = ipvlan->phy_dev; | |
302 | ||
303 | vlan_vid_del(phy_dev, proto, vid); | |
304 | return 0; | |
305 | } | |
306 | ||
7c411658 ND |
307 | static int ipvlan_get_iflink(const struct net_device *dev) |
308 | { | |
309 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
310 | ||
311 | return ipvlan->phy_dev->ifindex; | |
312 | } | |
313 | ||
2ad7bf36 MB |
314 | static const struct net_device_ops ipvlan_netdev_ops = { |
315 | .ndo_init = ipvlan_init, | |
316 | .ndo_uninit = ipvlan_uninit, | |
317 | .ndo_open = ipvlan_open, | |
318 | .ndo_stop = ipvlan_stop, | |
319 | .ndo_start_xmit = ipvlan_start_xmit, | |
320 | .ndo_fix_features = ipvlan_fix_features, | |
321 | .ndo_change_rx_flags = ipvlan_change_rx_flags, | |
322 | .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter, | |
323 | .ndo_get_stats64 = ipvlan_get_stats64, | |
324 | .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid, | |
325 | .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid, | |
7c411658 | 326 | .ndo_get_iflink = ipvlan_get_iflink, |
2ad7bf36 MB |
327 | }; |
328 | ||
329 | static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
330 | unsigned short type, const void *daddr, | |
331 | const void *saddr, unsigned len) | |
332 | { | |
333 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
334 | struct net_device *phy_dev = ipvlan->phy_dev; | |
335 | ||
336 | /* TODO Probably use a different field than dev_addr so that the | |
337 | * mac-address on the virtual device is portable and can be carried | |
338 | * while the packets use the mac-addr on the physical device. | |
339 | */ | |
340 | return dev_hard_header(skb, phy_dev, type, daddr, | |
341 | saddr ? : dev->dev_addr, len); | |
342 | } | |
343 | ||
344 | static const struct header_ops ipvlan_header_ops = { | |
345 | .create = ipvlan_hard_header, | |
2ad7bf36 MB |
346 | .parse = eth_header_parse, |
347 | .cache = eth_header_cache, | |
348 | .cache_update = eth_header_cache_update, | |
349 | }; | |
350 | ||
351 | static int ipvlan_ethtool_get_settings(struct net_device *dev, | |
352 | struct ethtool_cmd *cmd) | |
353 | { | |
354 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
355 | ||
356 | return __ethtool_get_settings(ipvlan->phy_dev, cmd); | |
357 | } | |
358 | ||
359 | static void ipvlan_ethtool_get_drvinfo(struct net_device *dev, | |
360 | struct ethtool_drvinfo *drvinfo) | |
361 | { | |
362 | strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver)); | |
363 | strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version)); | |
364 | } | |
365 | ||
366 | static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev) | |
367 | { | |
368 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
369 | ||
370 | return ipvlan->msg_enable; | |
371 | } | |
372 | ||
373 | static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value) | |
374 | { | |
375 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
376 | ||
377 | ipvlan->msg_enable = value; | |
378 | } | |
379 | ||
380 | static const struct ethtool_ops ipvlan_ethtool_ops = { | |
381 | .get_link = ethtool_op_get_link, | |
382 | .get_settings = ipvlan_ethtool_get_settings, | |
383 | .get_drvinfo = ipvlan_ethtool_get_drvinfo, | |
384 | .get_msglevel = ipvlan_ethtool_get_msglevel, | |
385 | .set_msglevel = ipvlan_ethtool_set_msglevel, | |
386 | }; | |
387 | ||
388 | static int ipvlan_nl_changelink(struct net_device *dev, | |
389 | struct nlattr *tb[], struct nlattr *data[]) | |
390 | { | |
391 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
392 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
393 | ||
394 | if (data && data[IFLA_IPVLAN_MODE]) { | |
395 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
396 | ||
397 | ipvlan_set_port_mode(port, nmode); | |
398 | } | |
399 | return 0; | |
400 | } | |
401 | ||
402 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
403 | { | |
404 | return (0 | |
405 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
406 | ); | |
407 | } | |
408 | ||
409 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[]) | |
410 | { | |
411 | if (data && data[IFLA_IPVLAN_MODE]) { | |
412 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
413 | ||
414 | if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX) | |
415 | return -EINVAL; | |
416 | } | |
417 | return 0; | |
418 | } | |
419 | ||
420 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
421 | const struct net_device *dev) | |
422 | { | |
423 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
424 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
425 | int ret = -EINVAL; | |
426 | ||
427 | if (!port) | |
428 | goto err; | |
429 | ||
430 | ret = -EMSGSIZE; | |
431 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
432 | goto err; | |
433 | ||
434 | return 0; | |
435 | ||
436 | err: | |
437 | return ret; | |
438 | } | |
439 | ||
440 | static int ipvlan_link_new(struct net *src_net, struct net_device *dev, | |
441 | struct nlattr *tb[], struct nlattr *data[]) | |
442 | { | |
443 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
444 | struct ipvl_port *port; | |
445 | struct net_device *phy_dev; | |
446 | int err; | |
447 | ||
448 | if (!tb[IFLA_LINK]) | |
449 | return -EINVAL; | |
450 | ||
451 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
452 | if (!phy_dev) | |
453 | return -ENODEV; | |
454 | ||
5933fea7 | 455 | if (netif_is_ipvlan(phy_dev)) { |
2ad7bf36 MB |
456 | struct ipvl_dev *tmp = netdev_priv(phy_dev); |
457 | ||
458 | phy_dev = tmp->phy_dev; | |
5933fea7 | 459 | } else if (!netif_is_ipvlan_port(phy_dev)) { |
2ad7bf36 MB |
460 | err = ipvlan_port_create(phy_dev); |
461 | if (err < 0) | |
462 | return err; | |
463 | } | |
464 | ||
465 | port = ipvlan_port_get_rtnl(phy_dev); | |
466 | if (data && data[IFLA_IPVLAN_MODE]) | |
467 | port->mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
468 | ||
469 | ipvlan->phy_dev = phy_dev; | |
470 | ipvlan->dev = dev; | |
471 | ipvlan->port = port; | |
472 | ipvlan->sfeatures = IPVLAN_FEATURES; | |
473 | INIT_LIST_HEAD(&ipvlan->addrs); | |
474 | ipvlan->ipv4cnt = 0; | |
475 | ipvlan->ipv6cnt = 0; | |
476 | ||
477 | /* TODO Probably put random address here to be presented to the | |
478 | * world but keep using the physical-dev address for the outgoing | |
479 | * packets. | |
480 | */ | |
481 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); | |
482 | ||
483 | dev->priv_flags |= IFF_IPVLAN_SLAVE; | |
484 | ||
485 | port->count += 1; | |
486 | err = register_netdevice(dev); | |
487 | if (err < 0) | |
488 | goto ipvlan_destroy_port; | |
489 | ||
490 | err = netdev_upper_dev_link(phy_dev, dev); | |
491 | if (err) | |
492 | goto ipvlan_destroy_port; | |
493 | ||
494 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
495 | netif_stacked_transfer_operstate(phy_dev, dev); | |
496 | return 0; | |
497 | ||
498 | ipvlan_destroy_port: | |
499 | port->count -= 1; | |
500 | if (!port->count) | |
501 | ipvlan_port_destroy(phy_dev); | |
502 | ||
503 | return err; | |
504 | } | |
505 | ||
506 | static void ipvlan_link_delete(struct net_device *dev, struct list_head *head) | |
507 | { | |
508 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
509 | struct ipvl_addr *addr, *next; | |
510 | ||
511 | if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) { | |
512 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { | |
513 | ipvlan_ht_addr_del(addr, !dev->dismantle); | |
40891e8a | 514 | list_del(&addr->anode); |
2ad7bf36 MB |
515 | } |
516 | } | |
517 | list_del_rcu(&ipvlan->pnode); | |
518 | unregister_netdevice_queue(dev, head); | |
519 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
520 | } | |
521 | ||
522 | static void ipvlan_link_setup(struct net_device *dev) | |
523 | { | |
524 | ether_setup(dev); | |
525 | ||
526 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); | |
527 | dev->priv_flags |= IFF_UNICAST_FLT; | |
528 | dev->netdev_ops = &ipvlan_netdev_ops; | |
529 | dev->destructor = free_netdev; | |
530 | dev->header_ops = &ipvlan_header_ops; | |
531 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
532 | dev->tx_queue_len = 0; | |
533 | } | |
534 | ||
535 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
536 | { | |
537 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
538 | }; | |
539 | ||
540 | static struct rtnl_link_ops ipvlan_link_ops = { | |
541 | .kind = "ipvlan", | |
542 | .priv_size = sizeof(struct ipvl_dev), | |
543 | ||
544 | .get_size = ipvlan_nl_getsize, | |
545 | .policy = ipvlan_nl_policy, | |
546 | .validate = ipvlan_nl_validate, | |
547 | .fill_info = ipvlan_nl_fillinfo, | |
548 | .changelink = ipvlan_nl_changelink, | |
549 | .maxtype = IFLA_IPVLAN_MAX, | |
550 | ||
551 | .setup = ipvlan_link_setup, | |
552 | .newlink = ipvlan_link_new, | |
553 | .dellink = ipvlan_link_delete, | |
554 | }; | |
555 | ||
92c7b0de | 556 | static int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 MB |
557 | { |
558 | return rtnl_link_register(ops); | |
559 | } | |
560 | ||
561 | static int ipvlan_device_event(struct notifier_block *unused, | |
562 | unsigned long event, void *ptr) | |
563 | { | |
564 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
565 | struct ipvl_dev *ipvlan, *next; | |
566 | struct ipvl_port *port; | |
567 | LIST_HEAD(lst_kill); | |
568 | ||
5933fea7 | 569 | if (!netif_is_ipvlan_port(dev)) |
2ad7bf36 MB |
570 | return NOTIFY_DONE; |
571 | ||
572 | port = ipvlan_port_get_rtnl(dev); | |
573 | ||
574 | switch (event) { | |
575 | case NETDEV_CHANGE: | |
576 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
577 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
578 | ipvlan->dev); | |
579 | break; | |
580 | ||
581 | case NETDEV_UNREGISTER: | |
582 | if (dev->reg_state != NETREG_UNREGISTERING) | |
583 | break; | |
584 | ||
585 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, | |
586 | pnode) | |
587 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, | |
588 | &lst_kill); | |
589 | unregister_netdevice_many(&lst_kill); | |
590 | break; | |
591 | ||
592 | case NETDEV_FEAT_CHANGE: | |
593 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
594 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
595 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
596 | netdev_features_change(ipvlan->dev); | |
597 | } | |
598 | break; | |
599 | ||
600 | case NETDEV_CHANGEMTU: | |
601 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
602 | ipvlan_adjust_mtu(ipvlan, dev); | |
603 | break; | |
604 | ||
605 | case NETDEV_PRE_TYPE_CHANGE: | |
606 | /* Forbid underlying device to change its type. */ | |
607 | return NOTIFY_BAD; | |
608 | } | |
609 | return NOTIFY_DONE; | |
610 | } | |
611 | ||
612 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
613 | { | |
614 | struct ipvl_addr *addr; | |
615 | ||
e9997c29 | 616 | if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) { |
2ad7bf36 MB |
617 | netif_err(ipvlan, ifup, ipvlan->dev, |
618 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
619 | ip6_addr, ipvlan->dev->name); | |
620 | return -EINVAL; | |
621 | } | |
622 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); | |
623 | if (!addr) | |
624 | return -ENOMEM; | |
625 | ||
626 | addr->master = ipvlan; | |
627 | memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr)); | |
628 | addr->atype = IPVL_IPV6; | |
40891e8a | 629 | list_add_tail(&addr->anode, &ipvlan->addrs); |
2ad7bf36 | 630 | ipvlan->ipv6cnt++; |
27705f70 JB |
631 | /* If the interface is not up, the address will be added to the hash |
632 | * list by ipvlan_open. | |
633 | */ | |
634 | if (netif_running(ipvlan->dev)) | |
635 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
636 | |
637 | return 0; | |
638 | } | |
639 | ||
640 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
641 | { | |
642 | struct ipvl_addr *addr; | |
643 | ||
e9997c29 | 644 | addr = ipvlan_find_addr(ipvlan, ip6_addr, true); |
2ad7bf36 MB |
645 | if (!addr) |
646 | return; | |
647 | ||
648 | ipvlan_ht_addr_del(addr, true); | |
40891e8a | 649 | list_del(&addr->anode); |
2ad7bf36 MB |
650 | ipvlan->ipv6cnt--; |
651 | WARN_ON(ipvlan->ipv6cnt < 0); | |
652 | kfree_rcu(addr, rcu); | |
653 | ||
654 | return; | |
655 | } | |
656 | ||
657 | static int ipvlan_addr6_event(struct notifier_block *unused, | |
658 | unsigned long event, void *ptr) | |
659 | { | |
660 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
661 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
662 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
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 | ||
684 | static 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); |
2ad7bf36 | 702 | ipvlan->ipv4cnt++; |
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 | ||
712 | static 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 | ||
720 | ipvlan_ht_addr_del(addr, true); | |
40891e8a | 721 | list_del(&addr->anode); |
2ad7bf36 MB |
722 | ipvlan->ipv4cnt--; |
723 | WARN_ON(ipvlan->ipv4cnt < 0); | |
2ad7bf36 MB |
724 | kfree_rcu(addr, rcu); |
725 | ||
726 | return; | |
727 | } | |
728 | ||
729 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
730 | unsigned long event, void *ptr) | |
731 | { | |
732 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
733 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
734 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
735 | struct in_addr ip4_addr; | |
736 | ||
5933fea7 | 737 | if (!netif_is_ipvlan(dev)) |
2ad7bf36 MB |
738 | return NOTIFY_DONE; |
739 | ||
740 | if (!ipvlan || !ipvlan->port) | |
741 | return NOTIFY_DONE; | |
742 | ||
743 | switch (event) { | |
744 | case NETDEV_UP: | |
745 | ip4_addr.s_addr = if4->ifa_address; | |
746 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
747 | return NOTIFY_BAD; | |
748 | break; | |
749 | ||
750 | case NETDEV_DOWN: | |
751 | ip4_addr.s_addr = if4->ifa_address; | |
752 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
753 | break; | |
754 | } | |
755 | ||
756 | return NOTIFY_OK; | |
757 | } | |
758 | ||
759 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { | |
760 | .notifier_call = ipvlan_addr4_event, | |
761 | }; | |
762 | ||
763 | static struct notifier_block ipvlan_notifier_block __read_mostly = { | |
764 | .notifier_call = ipvlan_device_event, | |
765 | }; | |
766 | ||
767 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { | |
768 | .notifier_call = ipvlan_addr6_event, | |
769 | }; | |
770 | ||
771 | static int __init ipvlan_init_module(void) | |
772 | { | |
773 | int err; | |
774 | ||
775 | ipvlan_init_secret(); | |
776 | register_netdevice_notifier(&ipvlan_notifier_block); | |
777 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
778 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
779 | ||
780 | err = ipvlan_link_register(&ipvlan_link_ops); | |
781 | if (err < 0) | |
782 | goto error; | |
783 | ||
784 | return 0; | |
785 | error: | |
786 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
787 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
788 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
789 | return err; | |
790 | } | |
791 | ||
792 | static void __exit ipvlan_cleanup_module(void) | |
793 | { | |
794 | rtnl_link_unregister(&ipvlan_link_ops); | |
795 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
796 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
797 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
798 | } | |
799 | ||
800 | module_init(ipvlan_init_module); | |
801 | module_exit(ipvlan_cleanup_module); | |
802 | ||
803 | MODULE_LICENSE("GPL"); | |
804 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
805 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
806 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |