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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 | ||
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 | } | |
41 | port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL); | |
42 | if (!port) | |
43 | return -ENOMEM; | |
44 | ||
45 | port->dev = dev; | |
46 | port->mode = IPVLAN_MODE_L3; | |
47 | INIT_LIST_HEAD(&port->ipvlans); | |
48 | for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++) | |
49 | INIT_HLIST_HEAD(&port->hlhead[idx]); | |
50 | ||
51 | err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port); | |
52 | if (err) | |
53 | goto err; | |
54 | ||
55 | dev->priv_flags |= IFF_IPVLAN_MASTER; | |
56 | return 0; | |
57 | ||
58 | err: | |
59 | kfree_rcu(port, rcu); | |
60 | return err; | |
61 | } | |
62 | ||
63 | static void ipvlan_port_destroy(struct net_device *dev) | |
64 | { | |
65 | struct ipvl_port *port = ipvlan_port_get_rtnl(dev); | |
66 | ||
67 | dev->priv_flags &= ~IFF_IPVLAN_MASTER; | |
68 | netdev_rx_handler_unregister(dev); | |
69 | kfree_rcu(port, rcu); | |
70 | } | |
71 | ||
72 | /* ipvlan network devices have devices nesting below it and are a special | |
73 | * "super class" of normal network devices; split their locks off into a | |
74 | * separate class since they always nest. | |
75 | */ | |
76 | static struct lock_class_key ipvlan_netdev_xmit_lock_key; | |
77 | static struct lock_class_key ipvlan_netdev_addr_lock_key; | |
78 | ||
79 | #define IPVLAN_FEATURES \ | |
80 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
81 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
82 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ | |
83 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) | |
84 | ||
85 | #define IPVLAN_STATE_MASK \ | |
86 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
87 | ||
88 | static void ipvlan_set_lockdep_class_one(struct net_device *dev, | |
89 | struct netdev_queue *txq, | |
90 | void *_unused) | |
91 | { | |
92 | lockdep_set_class(&txq->_xmit_lock, &ipvlan_netdev_xmit_lock_key); | |
93 | } | |
94 | ||
95 | static void ipvlan_set_lockdep_class(struct net_device *dev) | |
96 | { | |
97 | lockdep_set_class(&dev->addr_list_lock, &ipvlan_netdev_addr_lock_key); | |
98 | netdev_for_each_tx_queue(dev, ipvlan_set_lockdep_class_one, NULL); | |
99 | } | |
100 | ||
101 | static int ipvlan_init(struct net_device *dev) | |
102 | { | |
103 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
104 | const struct net_device *phy_dev = ipvlan->phy_dev; | |
105 | ||
106 | dev->state = (dev->state & ~IPVLAN_STATE_MASK) | | |
107 | (phy_dev->state & IPVLAN_STATE_MASK); | |
108 | dev->features = phy_dev->features & IPVLAN_FEATURES; | |
109 | dev->features |= NETIF_F_LLTX; | |
110 | dev->gso_max_size = phy_dev->gso_max_size; | |
111 | dev->iflink = phy_dev->ifindex; | |
112 | dev->hard_header_len = phy_dev->hard_header_len; | |
113 | ||
114 | ipvlan_set_lockdep_class(dev); | |
115 | ||
116 | ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats); | |
117 | if (!ipvlan->pcpu_stats) | |
118 | return -ENOMEM; | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | static void ipvlan_uninit(struct net_device *dev) | |
124 | { | |
125 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
126 | struct ipvl_port *port = ipvlan->port; | |
127 | ||
128 | if (ipvlan->pcpu_stats) | |
129 | free_percpu(ipvlan->pcpu_stats); | |
130 | ||
131 | port->count -= 1; | |
132 | if (!port->count) | |
133 | ipvlan_port_destroy(port->dev); | |
134 | } | |
135 | ||
136 | static int ipvlan_open(struct net_device *dev) | |
137 | { | |
138 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
139 | struct net_device *phy_dev = ipvlan->phy_dev; | |
140 | struct ipvl_addr *addr; | |
141 | ||
142 | if (ipvlan->port->mode == IPVLAN_MODE_L3) | |
143 | dev->flags |= IFF_NOARP; | |
144 | else | |
145 | dev->flags &= ~IFF_NOARP; | |
146 | ||
147 | if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) { | |
148 | list_for_each_entry(addr, &ipvlan->addrs, anode) | |
149 | ipvlan_ht_addr_add(ipvlan, addr); | |
150 | } | |
151 | return dev_uc_add(phy_dev, phy_dev->dev_addr); | |
152 | } | |
153 | ||
154 | static int ipvlan_stop(struct net_device *dev) | |
155 | { | |
156 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
157 | struct net_device *phy_dev = ipvlan->phy_dev; | |
158 | struct ipvl_addr *addr; | |
159 | ||
160 | dev_uc_unsync(phy_dev, dev); | |
161 | dev_mc_unsync(phy_dev, dev); | |
162 | ||
163 | dev_uc_del(phy_dev, phy_dev->dev_addr); | |
164 | ||
165 | if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) { | |
166 | list_for_each_entry(addr, &ipvlan->addrs, anode) | |
167 | ipvlan_ht_addr_del(addr, !dev->dismantle); | |
168 | } | |
169 | return 0; | |
170 | } | |
171 | ||
92c7b0de MB |
172 | static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, |
173 | struct net_device *dev) | |
2ad7bf36 MB |
174 | { |
175 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
176 | int skblen = skb->len; | |
177 | int ret; | |
178 | ||
179 | ret = ipvlan_queue_xmit(skb, dev); | |
180 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
181 | struct ipvl_pcpu_stats *pcptr; | |
182 | ||
183 | pcptr = this_cpu_ptr(ipvlan->pcpu_stats); | |
184 | ||
185 | u64_stats_update_begin(&pcptr->syncp); | |
186 | pcptr->tx_pkts++; | |
187 | pcptr->tx_bytes += skblen; | |
188 | u64_stats_update_end(&pcptr->syncp); | |
189 | } else { | |
190 | this_cpu_inc(ipvlan->pcpu_stats->tx_drps); | |
191 | } | |
192 | return ret; | |
193 | } | |
194 | ||
195 | static netdev_features_t ipvlan_fix_features(struct net_device *dev, | |
196 | netdev_features_t features) | |
197 | { | |
198 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
199 | ||
200 | return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES); | |
201 | } | |
202 | ||
203 | static void ipvlan_change_rx_flags(struct net_device *dev, int change) | |
204 | { | |
205 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
206 | struct net_device *phy_dev = ipvlan->phy_dev; | |
207 | ||
208 | if (change & IFF_ALLMULTI) | |
209 | dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1); | |
210 | } | |
211 | ||
212 | static void ipvlan_set_broadcast_mac_filter(struct ipvl_dev *ipvlan, bool set) | |
213 | { | |
214 | struct net_device *dev = ipvlan->dev; | |
215 | unsigned int hashbit = ipvlan_mac_hash(dev->broadcast); | |
216 | ||
217 | if (set && !test_bit(hashbit, ipvlan->mac_filters)) | |
218 | __set_bit(hashbit, ipvlan->mac_filters); | |
219 | else if (!set && test_bit(hashbit, ipvlan->mac_filters)) | |
220 | __clear_bit(hashbit, ipvlan->mac_filters); | |
221 | } | |
222 | ||
223 | static 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 | ||
237 | bitmap_copy(ipvlan->mac_filters, mc_filters, | |
238 | IPVLAN_MAC_FILTER_SIZE); | |
239 | } | |
240 | dev_uc_sync(ipvlan->phy_dev, dev); | |
241 | dev_mc_sync(ipvlan->phy_dev, dev); | |
242 | } | |
243 | ||
244 | static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev, | |
245 | struct rtnl_link_stats64 *s) | |
246 | { | |
247 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
248 | ||
249 | if (ipvlan->pcpu_stats) { | |
250 | struct ipvl_pcpu_stats *pcptr; | |
251 | u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes; | |
252 | u32 rx_errs = 0, tx_drps = 0; | |
253 | u32 strt; | |
254 | int idx; | |
255 | ||
256 | for_each_possible_cpu(idx) { | |
257 | pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx); | |
258 | do { | |
259 | strt= u64_stats_fetch_begin_irq(&pcptr->syncp); | |
260 | rx_pkts = pcptr->rx_pkts; | |
261 | rx_bytes = pcptr->rx_bytes; | |
262 | rx_mcast = pcptr->rx_mcast; | |
263 | tx_pkts = pcptr->tx_pkts; | |
264 | tx_bytes = pcptr->tx_bytes; | |
265 | } while (u64_stats_fetch_retry_irq(&pcptr->syncp, | |
266 | strt)); | |
267 | ||
268 | s->rx_packets += rx_pkts; | |
269 | s->rx_bytes += rx_bytes; | |
270 | s->multicast += rx_mcast; | |
271 | s->tx_packets += tx_pkts; | |
272 | s->tx_bytes += tx_bytes; | |
273 | ||
274 | /* u32 values are updated without syncp protection. */ | |
275 | rx_errs += pcptr->rx_errs; | |
276 | tx_drps += pcptr->tx_drps; | |
277 | } | |
278 | s->rx_errors = rx_errs; | |
279 | s->rx_dropped = rx_errs; | |
280 | s->tx_dropped = tx_drps; | |
281 | } | |
282 | return s; | |
283 | } | |
284 | ||
285 | static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) | |
286 | { | |
287 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
288 | struct net_device *phy_dev = ipvlan->phy_dev; | |
289 | ||
290 | return vlan_vid_add(phy_dev, proto, vid); | |
291 | } | |
292 | ||
293 | static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, | |
294 | u16 vid) | |
295 | { | |
296 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
297 | struct net_device *phy_dev = ipvlan->phy_dev; | |
298 | ||
299 | vlan_vid_del(phy_dev, proto, vid); | |
300 | return 0; | |
301 | } | |
302 | ||
303 | static const struct net_device_ops ipvlan_netdev_ops = { | |
304 | .ndo_init = ipvlan_init, | |
305 | .ndo_uninit = ipvlan_uninit, | |
306 | .ndo_open = ipvlan_open, | |
307 | .ndo_stop = ipvlan_stop, | |
308 | .ndo_start_xmit = ipvlan_start_xmit, | |
309 | .ndo_fix_features = ipvlan_fix_features, | |
310 | .ndo_change_rx_flags = ipvlan_change_rx_flags, | |
311 | .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter, | |
312 | .ndo_get_stats64 = ipvlan_get_stats64, | |
313 | .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid, | |
314 | .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid, | |
315 | }; | |
316 | ||
317 | static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
318 | unsigned short type, const void *daddr, | |
319 | const void *saddr, unsigned len) | |
320 | { | |
321 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
322 | struct net_device *phy_dev = ipvlan->phy_dev; | |
323 | ||
324 | /* TODO Probably use a different field than dev_addr so that the | |
325 | * mac-address on the virtual device is portable and can be carried | |
326 | * while the packets use the mac-addr on the physical device. | |
327 | */ | |
328 | return dev_hard_header(skb, phy_dev, type, daddr, | |
329 | saddr ? : dev->dev_addr, len); | |
330 | } | |
331 | ||
332 | static const struct header_ops ipvlan_header_ops = { | |
333 | .create = ipvlan_hard_header, | |
334 | .rebuild = eth_rebuild_header, | |
335 | .parse = eth_header_parse, | |
336 | .cache = eth_header_cache, | |
337 | .cache_update = eth_header_cache_update, | |
338 | }; | |
339 | ||
340 | static int ipvlan_ethtool_get_settings(struct net_device *dev, | |
341 | struct ethtool_cmd *cmd) | |
342 | { | |
343 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
344 | ||
345 | return __ethtool_get_settings(ipvlan->phy_dev, cmd); | |
346 | } | |
347 | ||
348 | static void ipvlan_ethtool_get_drvinfo(struct net_device *dev, | |
349 | struct ethtool_drvinfo *drvinfo) | |
350 | { | |
351 | strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver)); | |
352 | strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version)); | |
353 | } | |
354 | ||
355 | static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev) | |
356 | { | |
357 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
358 | ||
359 | return ipvlan->msg_enable; | |
360 | } | |
361 | ||
362 | static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value) | |
363 | { | |
364 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
365 | ||
366 | ipvlan->msg_enable = value; | |
367 | } | |
368 | ||
369 | static const struct ethtool_ops ipvlan_ethtool_ops = { | |
370 | .get_link = ethtool_op_get_link, | |
371 | .get_settings = ipvlan_ethtool_get_settings, | |
372 | .get_drvinfo = ipvlan_ethtool_get_drvinfo, | |
373 | .get_msglevel = ipvlan_ethtool_get_msglevel, | |
374 | .set_msglevel = ipvlan_ethtool_set_msglevel, | |
375 | }; | |
376 | ||
377 | static int ipvlan_nl_changelink(struct net_device *dev, | |
378 | struct nlattr *tb[], struct nlattr *data[]) | |
379 | { | |
380 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
381 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
382 | ||
383 | if (data && data[IFLA_IPVLAN_MODE]) { | |
384 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
385 | ||
386 | ipvlan_set_port_mode(port, nmode); | |
387 | } | |
388 | return 0; | |
389 | } | |
390 | ||
391 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
392 | { | |
393 | return (0 | |
394 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
395 | ); | |
396 | } | |
397 | ||
398 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[]) | |
399 | { | |
400 | if (data && data[IFLA_IPVLAN_MODE]) { | |
401 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
402 | ||
403 | if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX) | |
404 | return -EINVAL; | |
405 | } | |
406 | return 0; | |
407 | } | |
408 | ||
409 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
410 | const struct net_device *dev) | |
411 | { | |
412 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
413 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
414 | int ret = -EINVAL; | |
415 | ||
416 | if (!port) | |
417 | goto err; | |
418 | ||
419 | ret = -EMSGSIZE; | |
420 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
421 | goto err; | |
422 | ||
423 | return 0; | |
424 | ||
425 | err: | |
426 | return ret; | |
427 | } | |
428 | ||
429 | static int ipvlan_link_new(struct net *src_net, struct net_device *dev, | |
430 | struct nlattr *tb[], struct nlattr *data[]) | |
431 | { | |
432 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
433 | struct ipvl_port *port; | |
434 | struct net_device *phy_dev; | |
435 | int err; | |
436 | ||
437 | if (!tb[IFLA_LINK]) | |
438 | return -EINVAL; | |
439 | ||
440 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
441 | if (!phy_dev) | |
442 | return -ENODEV; | |
443 | ||
444 | if (ipvlan_dev_slave(phy_dev)) { | |
445 | struct ipvl_dev *tmp = netdev_priv(phy_dev); | |
446 | ||
447 | phy_dev = tmp->phy_dev; | |
448 | } else if (!ipvlan_dev_master(phy_dev)) { | |
449 | err = ipvlan_port_create(phy_dev); | |
450 | if (err < 0) | |
451 | return err; | |
452 | } | |
453 | ||
454 | port = ipvlan_port_get_rtnl(phy_dev); | |
455 | if (data && data[IFLA_IPVLAN_MODE]) | |
456 | port->mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
457 | ||
458 | ipvlan->phy_dev = phy_dev; | |
459 | ipvlan->dev = dev; | |
460 | ipvlan->port = port; | |
461 | ipvlan->sfeatures = IPVLAN_FEATURES; | |
462 | INIT_LIST_HEAD(&ipvlan->addrs); | |
463 | ipvlan->ipv4cnt = 0; | |
464 | ipvlan->ipv6cnt = 0; | |
465 | ||
466 | /* TODO Probably put random address here to be presented to the | |
467 | * world but keep using the physical-dev address for the outgoing | |
468 | * packets. | |
469 | */ | |
470 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); | |
471 | ||
472 | dev->priv_flags |= IFF_IPVLAN_SLAVE; | |
473 | ||
474 | port->count += 1; | |
475 | err = register_netdevice(dev); | |
476 | if (err < 0) | |
477 | goto ipvlan_destroy_port; | |
478 | ||
479 | err = netdev_upper_dev_link(phy_dev, dev); | |
480 | if (err) | |
481 | goto ipvlan_destroy_port; | |
482 | ||
483 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
484 | netif_stacked_transfer_operstate(phy_dev, dev); | |
485 | return 0; | |
486 | ||
487 | ipvlan_destroy_port: | |
488 | port->count -= 1; | |
489 | if (!port->count) | |
490 | ipvlan_port_destroy(phy_dev); | |
491 | ||
492 | return err; | |
493 | } | |
494 | ||
495 | static void ipvlan_link_delete(struct net_device *dev, struct list_head *head) | |
496 | { | |
497 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
498 | struct ipvl_addr *addr, *next; | |
499 | ||
500 | if (ipvlan->ipv6cnt > 0 || ipvlan->ipv4cnt > 0) { | |
501 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { | |
502 | ipvlan_ht_addr_del(addr, !dev->dismantle); | |
503 | list_del_rcu(&addr->anode); | |
504 | } | |
505 | } | |
506 | list_del_rcu(&ipvlan->pnode); | |
507 | unregister_netdevice_queue(dev, head); | |
508 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
509 | } | |
510 | ||
511 | static void ipvlan_link_setup(struct net_device *dev) | |
512 | { | |
513 | ether_setup(dev); | |
514 | ||
515 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); | |
516 | dev->priv_flags |= IFF_UNICAST_FLT; | |
517 | dev->netdev_ops = &ipvlan_netdev_ops; | |
518 | dev->destructor = free_netdev; | |
519 | dev->header_ops = &ipvlan_header_ops; | |
520 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
521 | dev->tx_queue_len = 0; | |
522 | } | |
523 | ||
524 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
525 | { | |
526 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
527 | }; | |
528 | ||
529 | static struct rtnl_link_ops ipvlan_link_ops = { | |
530 | .kind = "ipvlan", | |
531 | .priv_size = sizeof(struct ipvl_dev), | |
532 | ||
533 | .get_size = ipvlan_nl_getsize, | |
534 | .policy = ipvlan_nl_policy, | |
535 | .validate = ipvlan_nl_validate, | |
536 | .fill_info = ipvlan_nl_fillinfo, | |
537 | .changelink = ipvlan_nl_changelink, | |
538 | .maxtype = IFLA_IPVLAN_MAX, | |
539 | ||
540 | .setup = ipvlan_link_setup, | |
541 | .newlink = ipvlan_link_new, | |
542 | .dellink = ipvlan_link_delete, | |
543 | }; | |
544 | ||
92c7b0de | 545 | static int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 MB |
546 | { |
547 | return rtnl_link_register(ops); | |
548 | } | |
549 | ||
550 | static int ipvlan_device_event(struct notifier_block *unused, | |
551 | unsigned long event, void *ptr) | |
552 | { | |
553 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
554 | struct ipvl_dev *ipvlan, *next; | |
555 | struct ipvl_port *port; | |
556 | LIST_HEAD(lst_kill); | |
557 | ||
558 | if (!ipvlan_dev_master(dev)) | |
559 | return NOTIFY_DONE; | |
560 | ||
561 | port = ipvlan_port_get_rtnl(dev); | |
562 | ||
563 | switch (event) { | |
564 | case NETDEV_CHANGE: | |
565 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
566 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
567 | ipvlan->dev); | |
568 | break; | |
569 | ||
570 | case NETDEV_UNREGISTER: | |
571 | if (dev->reg_state != NETREG_UNREGISTERING) | |
572 | break; | |
573 | ||
574 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, | |
575 | pnode) | |
576 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, | |
577 | &lst_kill); | |
578 | unregister_netdevice_many(&lst_kill); | |
579 | break; | |
580 | ||
581 | case NETDEV_FEAT_CHANGE: | |
582 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
583 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
584 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
585 | netdev_features_change(ipvlan->dev); | |
586 | } | |
587 | break; | |
588 | ||
589 | case NETDEV_CHANGEMTU: | |
590 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
591 | ipvlan_adjust_mtu(ipvlan, dev); | |
592 | break; | |
593 | ||
594 | case NETDEV_PRE_TYPE_CHANGE: | |
595 | /* Forbid underlying device to change its type. */ | |
596 | return NOTIFY_BAD; | |
597 | } | |
598 | return NOTIFY_DONE; | |
599 | } | |
600 | ||
601 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
602 | { | |
603 | struct ipvl_addr *addr; | |
604 | ||
605 | if (ipvlan_addr_busy(ipvlan, ip6_addr, true)) { | |
606 | netif_err(ipvlan, ifup, ipvlan->dev, | |
607 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
608 | ip6_addr, ipvlan->dev->name); | |
609 | return -EINVAL; | |
610 | } | |
611 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); | |
612 | if (!addr) | |
613 | return -ENOMEM; | |
614 | ||
615 | addr->master = ipvlan; | |
616 | memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr)); | |
617 | addr->atype = IPVL_IPV6; | |
618 | list_add_tail_rcu(&addr->anode, &ipvlan->addrs); | |
619 | ipvlan->ipv6cnt++; | |
620 | ipvlan_ht_addr_add(ipvlan, addr); | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
625 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
626 | { | |
627 | struct ipvl_addr *addr; | |
628 | ||
629 | addr = ipvlan_ht_addr_lookup(ipvlan->port, ip6_addr, true); | |
630 | if (!addr) | |
631 | return; | |
632 | ||
633 | ipvlan_ht_addr_del(addr, true); | |
634 | list_del_rcu(&addr->anode); | |
635 | ipvlan->ipv6cnt--; | |
636 | WARN_ON(ipvlan->ipv6cnt < 0); | |
637 | kfree_rcu(addr, rcu); | |
638 | ||
639 | return; | |
640 | } | |
641 | ||
642 | static int ipvlan_addr6_event(struct notifier_block *unused, | |
643 | unsigned long event, void *ptr) | |
644 | { | |
645 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
646 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
647 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
648 | ||
649 | if (!ipvlan_dev_slave(dev)) | |
650 | return NOTIFY_DONE; | |
651 | ||
652 | if (!ipvlan || !ipvlan->port) | |
653 | return NOTIFY_DONE; | |
654 | ||
655 | switch (event) { | |
656 | case NETDEV_UP: | |
657 | if (ipvlan_add_addr6(ipvlan, &if6->addr)) | |
658 | return NOTIFY_BAD; | |
659 | break; | |
660 | ||
661 | case NETDEV_DOWN: | |
662 | ipvlan_del_addr6(ipvlan, &if6->addr); | |
663 | break; | |
664 | } | |
665 | ||
666 | return NOTIFY_OK; | |
667 | } | |
668 | ||
669 | static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
670 | { | |
671 | struct ipvl_addr *addr; | |
672 | ||
673 | if (ipvlan_addr_busy(ipvlan, ip4_addr, false)) { | |
674 | netif_err(ipvlan, ifup, ipvlan->dev, | |
675 | "Failed to add IPv4=%pI4 on %s intf.\n", | |
676 | ip4_addr, ipvlan->dev->name); | |
677 | return -EINVAL; | |
678 | } | |
679 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL); | |
680 | if (!addr) | |
681 | return -ENOMEM; | |
682 | ||
683 | addr->master = ipvlan; | |
684 | memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr)); | |
685 | addr->atype = IPVL_IPV4; | |
686 | list_add_tail_rcu(&addr->anode, &ipvlan->addrs); | |
687 | ipvlan->ipv4cnt++; | |
688 | ipvlan_ht_addr_add(ipvlan, addr); | |
689 | ipvlan_set_broadcast_mac_filter(ipvlan, true); | |
690 | ||
691 | return 0; | |
692 | } | |
693 | ||
694 | static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
695 | { | |
696 | struct ipvl_addr *addr; | |
697 | ||
698 | addr = ipvlan_ht_addr_lookup(ipvlan->port, ip4_addr, false); | |
699 | if (!addr) | |
700 | return; | |
701 | ||
702 | ipvlan_ht_addr_del(addr, true); | |
703 | list_del_rcu(&addr->anode); | |
704 | ipvlan->ipv4cnt--; | |
705 | WARN_ON(ipvlan->ipv4cnt < 0); | |
706 | if (!ipvlan->ipv4cnt) | |
707 | ipvlan_set_broadcast_mac_filter(ipvlan, false); | |
708 | kfree_rcu(addr, rcu); | |
709 | ||
710 | return; | |
711 | } | |
712 | ||
713 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
714 | unsigned long event, void *ptr) | |
715 | { | |
716 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
717 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
718 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
719 | struct in_addr ip4_addr; | |
720 | ||
721 | if (!ipvlan_dev_slave(dev)) | |
722 | return NOTIFY_DONE; | |
723 | ||
724 | if (!ipvlan || !ipvlan->port) | |
725 | return NOTIFY_DONE; | |
726 | ||
727 | switch (event) { | |
728 | case NETDEV_UP: | |
729 | ip4_addr.s_addr = if4->ifa_address; | |
730 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
731 | return NOTIFY_BAD; | |
732 | break; | |
733 | ||
734 | case NETDEV_DOWN: | |
735 | ip4_addr.s_addr = if4->ifa_address; | |
736 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
737 | break; | |
738 | } | |
739 | ||
740 | return NOTIFY_OK; | |
741 | } | |
742 | ||
743 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { | |
744 | .notifier_call = ipvlan_addr4_event, | |
745 | }; | |
746 | ||
747 | static struct notifier_block ipvlan_notifier_block __read_mostly = { | |
748 | .notifier_call = ipvlan_device_event, | |
749 | }; | |
750 | ||
751 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { | |
752 | .notifier_call = ipvlan_addr6_event, | |
753 | }; | |
754 | ||
755 | static int __init ipvlan_init_module(void) | |
756 | { | |
757 | int err; | |
758 | ||
759 | ipvlan_init_secret(); | |
760 | register_netdevice_notifier(&ipvlan_notifier_block); | |
761 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
762 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
763 | ||
764 | err = ipvlan_link_register(&ipvlan_link_ops); | |
765 | if (err < 0) | |
766 | goto error; | |
767 | ||
768 | return 0; | |
769 | error: | |
770 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
771 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
772 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
773 | return err; | |
774 | } | |
775 | ||
776 | static void __exit ipvlan_cleanup_module(void) | |
777 | { | |
778 | rtnl_link_unregister(&ipvlan_link_ops); | |
779 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
780 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
781 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
782 | } | |
783 | ||
784 | module_init(ipvlan_init_module); | |
785 | module_exit(ipvlan_cleanup_module); | |
786 | ||
787 | MODULE_LICENSE("GPL"); | |
788 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
789 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
790 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |