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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 | ||
ab5b7013 | 12 | static 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 | 17 | static 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 | ||
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 \ | |
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 | ||
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; | |
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 | ||
137 | static 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 | ||
149 | static 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 | ||
166 | static 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 |
183 | static 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 | ||
206 | static 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 | ||
214 | static 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 |
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 | ||
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 | ||
250 | static 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 | ||
291 | static 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 | ||
299 | static 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 |
309 | static 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 |
316 | static 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 | ||
331 | static 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 | ||
346 | static 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 |
353 | static 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 | ||
361 | static 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 | ||
368 | static 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 | ||
375 | static 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 | ||
382 | static 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 | ||
390 | static 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 | ||
404 | static 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 | ||
411 | static 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 | ||
422 | static 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 | ||
438 | err: | |
439 | return ret; | |
440 | } | |
441 | ||
442 | static 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 | ||
504 | static 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 | ||
520 | static 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 | ||
532 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
533 | { | |
534 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
535 | }; | |
536 | ||
537 | static 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 | 553 | static int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 MB |
554 | { |
555 | return rtnl_link_register(ops); | |
556 | } | |
557 | ||
558 | static 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 | ||
610 | static 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 | ||
638 | static 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 | ||
653 | static 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 | ||
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); |
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 | ||
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 | ||
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 | ||
727 | static 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 | ||
757 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { | |
758 | .notifier_call = ipvlan_addr4_event, | |
759 | }; | |
760 | ||
761 | static struct notifier_block ipvlan_notifier_block __read_mostly = { | |
762 | .notifier_call = ipvlan_device_event, | |
763 | }; | |
764 | ||
765 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { | |
766 | .notifier_call = ipvlan_addr6_event, | |
767 | }; | |
768 | ||
769 | static 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; | |
783 | error: | |
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 | ||
790 | static 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 | ||
798 | module_init(ipvlan_init_module); | |
799 | module_exit(ipvlan_cleanup_module); | |
800 | ||
801 | MODULE_LICENSE("GPL"); | |
802 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
803 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
804 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |