]>
Commit | Line | Data |
---|---|---|
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 | ||
2ad7bf36 | 83 | #define IPVLAN_FEATURES \ |
a188222b | 84 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
2ad7bf36 MB |
85 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ |
86 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ | |
87 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) | |
88 | ||
89 | #define IPVLAN_STATE_MASK \ | |
90 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
91 | ||
2ad7bf36 MB |
92 | static int ipvlan_init(struct net_device *dev) |
93 | { | |
94 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
95 | const struct net_device *phy_dev = ipvlan->phy_dev; | |
494e8489 | 96 | struct ipvl_port *port = ipvlan->port; |
2ad7bf36 MB |
97 | |
98 | dev->state = (dev->state & ~IPVLAN_STATE_MASK) | | |
99 | (phy_dev->state & IPVLAN_STATE_MASK); | |
100 | dev->features = phy_dev->features & IPVLAN_FEATURES; | |
101 | dev->features |= NETIF_F_LLTX; | |
102 | dev->gso_max_size = phy_dev->gso_max_size; | |
f6773c5e | 103 | dev->gso_max_segs = phy_dev->gso_max_segs; |
2ad7bf36 MB |
104 | dev->hard_header_len = phy_dev->hard_header_len; |
105 | ||
0d7dd798 | 106 | netdev_lockdep_set_classes(dev); |
2ad7bf36 MB |
107 | |
108 | ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats); | |
109 | if (!ipvlan->pcpu_stats) | |
110 | return -ENOMEM; | |
111 | ||
494e8489 MB |
112 | port->count += 1; |
113 | ||
2ad7bf36 MB |
114 | return 0; |
115 | } | |
116 | ||
117 | static void ipvlan_uninit(struct net_device *dev) | |
118 | { | |
119 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
120 | struct ipvl_port *port = ipvlan->port; | |
121 | ||
04901cea | 122 | free_percpu(ipvlan->pcpu_stats); |
2ad7bf36 MB |
123 | |
124 | port->count -= 1; | |
125 | if (!port->count) | |
126 | ipvlan_port_destroy(port->dev); | |
127 | } | |
128 | ||
129 | static int ipvlan_open(struct net_device *dev) | |
130 | { | |
131 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
132 | struct net_device *phy_dev = ipvlan->phy_dev; | |
133 | struct ipvl_addr *addr; | |
134 | ||
135 | if (ipvlan->port->mode == IPVLAN_MODE_L3) | |
136 | dev->flags |= IFF_NOARP; | |
137 | else | |
138 | dev->flags &= ~IFF_NOARP; | |
139 | ||
515866f8 KK |
140 | list_for_each_entry(addr, &ipvlan->addrs, anode) |
141 | ipvlan_ht_addr_add(ipvlan, addr); | |
142 | ||
2ad7bf36 MB |
143 | return dev_uc_add(phy_dev, phy_dev->dev_addr); |
144 | } | |
145 | ||
146 | static int ipvlan_stop(struct net_device *dev) | |
147 | { | |
148 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
149 | struct net_device *phy_dev = ipvlan->phy_dev; | |
150 | struct ipvl_addr *addr; | |
151 | ||
152 | dev_uc_unsync(phy_dev, dev); | |
153 | dev_mc_unsync(phy_dev, dev); | |
154 | ||
155 | dev_uc_del(phy_dev, phy_dev->dev_addr); | |
156 | ||
515866f8 | 157 | list_for_each_entry(addr, &ipvlan->addrs, anode) |
6640e673 | 158 | ipvlan_ht_addr_del(addr); |
515866f8 | 159 | |
2ad7bf36 MB |
160 | return 0; |
161 | } | |
162 | ||
92c7b0de MB |
163 | static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, |
164 | struct net_device *dev) | |
2ad7bf36 MB |
165 | { |
166 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
167 | int skblen = skb->len; | |
168 | int ret; | |
169 | ||
170 | ret = ipvlan_queue_xmit(skb, dev); | |
171 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
172 | struct ipvl_pcpu_stats *pcptr; | |
173 | ||
174 | pcptr = this_cpu_ptr(ipvlan->pcpu_stats); | |
175 | ||
176 | u64_stats_update_begin(&pcptr->syncp); | |
177 | pcptr->tx_pkts++; | |
178 | pcptr->tx_bytes += skblen; | |
179 | u64_stats_update_end(&pcptr->syncp); | |
180 | } else { | |
181 | this_cpu_inc(ipvlan->pcpu_stats->tx_drps); | |
182 | } | |
183 | return ret; | |
184 | } | |
185 | ||
186 | static netdev_features_t ipvlan_fix_features(struct net_device *dev, | |
187 | netdev_features_t features) | |
188 | { | |
189 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
190 | ||
191 | return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES); | |
192 | } | |
193 | ||
194 | static void ipvlan_change_rx_flags(struct net_device *dev, int change) | |
195 | { | |
196 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
197 | struct net_device *phy_dev = ipvlan->phy_dev; | |
198 | ||
199 | if (change & IFF_ALLMULTI) | |
200 | dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1); | |
201 | } | |
202 | ||
2ad7bf36 MB |
203 | static void ipvlan_set_multicast_mac_filter(struct net_device *dev) |
204 | { | |
205 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
206 | ||
207 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { | |
208 | bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE); | |
209 | } else { | |
210 | struct netdev_hw_addr *ha; | |
211 | DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
212 | ||
213 | bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
214 | netdev_for_each_mc_addr(ha, dev) | |
215 | __set_bit(ipvlan_mac_hash(ha->addr), mc_filters); | |
216 | ||
f631c44b MB |
217 | /* Turn-on broadcast bit irrespective of address family, |
218 | * since broadcast is deferred to a work-queue, hence no | |
219 | * impact on fast-path processing. | |
220 | */ | |
221 | __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters); | |
222 | ||
2ad7bf36 MB |
223 | bitmap_copy(ipvlan->mac_filters, mc_filters, |
224 | IPVLAN_MAC_FILTER_SIZE); | |
225 | } | |
226 | dev_uc_sync(ipvlan->phy_dev, dev); | |
227 | dev_mc_sync(ipvlan->phy_dev, dev); | |
228 | } | |
229 | ||
230 | static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev, | |
231 | struct rtnl_link_stats64 *s) | |
232 | { | |
233 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
234 | ||
235 | if (ipvlan->pcpu_stats) { | |
236 | struct ipvl_pcpu_stats *pcptr; | |
237 | u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes; | |
238 | u32 rx_errs = 0, tx_drps = 0; | |
239 | u32 strt; | |
240 | int idx; | |
241 | ||
242 | for_each_possible_cpu(idx) { | |
243 | pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx); | |
244 | do { | |
245 | strt= u64_stats_fetch_begin_irq(&pcptr->syncp); | |
246 | rx_pkts = pcptr->rx_pkts; | |
247 | rx_bytes = pcptr->rx_bytes; | |
248 | rx_mcast = pcptr->rx_mcast; | |
249 | tx_pkts = pcptr->tx_pkts; | |
250 | tx_bytes = pcptr->tx_bytes; | |
251 | } while (u64_stats_fetch_retry_irq(&pcptr->syncp, | |
252 | strt)); | |
253 | ||
254 | s->rx_packets += rx_pkts; | |
255 | s->rx_bytes += rx_bytes; | |
256 | s->multicast += rx_mcast; | |
257 | s->tx_packets += tx_pkts; | |
258 | s->tx_bytes += tx_bytes; | |
259 | ||
260 | /* u32 values are updated without syncp protection. */ | |
261 | rx_errs += pcptr->rx_errs; | |
262 | tx_drps += pcptr->tx_drps; | |
263 | } | |
264 | s->rx_errors = rx_errs; | |
265 | s->rx_dropped = rx_errs; | |
266 | s->tx_dropped = tx_drps; | |
267 | } | |
268 | return s; | |
269 | } | |
270 | ||
271 | static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) | |
272 | { | |
273 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
274 | struct net_device *phy_dev = ipvlan->phy_dev; | |
275 | ||
276 | return vlan_vid_add(phy_dev, proto, vid); | |
277 | } | |
278 | ||
279 | static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, | |
280 | u16 vid) | |
281 | { | |
282 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
283 | struct net_device *phy_dev = ipvlan->phy_dev; | |
284 | ||
285 | vlan_vid_del(phy_dev, proto, vid); | |
286 | return 0; | |
287 | } | |
288 | ||
7c411658 ND |
289 | static int ipvlan_get_iflink(const struct net_device *dev) |
290 | { | |
291 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
292 | ||
293 | return ipvlan->phy_dev->ifindex; | |
294 | } | |
295 | ||
2ad7bf36 MB |
296 | static const struct net_device_ops ipvlan_netdev_ops = { |
297 | .ndo_init = ipvlan_init, | |
298 | .ndo_uninit = ipvlan_uninit, | |
299 | .ndo_open = ipvlan_open, | |
300 | .ndo_stop = ipvlan_stop, | |
301 | .ndo_start_xmit = ipvlan_start_xmit, | |
302 | .ndo_fix_features = ipvlan_fix_features, | |
303 | .ndo_change_rx_flags = ipvlan_change_rx_flags, | |
304 | .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter, | |
305 | .ndo_get_stats64 = ipvlan_get_stats64, | |
306 | .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid, | |
307 | .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid, | |
7c411658 | 308 | .ndo_get_iflink = ipvlan_get_iflink, |
2ad7bf36 MB |
309 | }; |
310 | ||
311 | static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
312 | unsigned short type, const void *daddr, | |
313 | const void *saddr, unsigned len) | |
314 | { | |
315 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
316 | struct net_device *phy_dev = ipvlan->phy_dev; | |
317 | ||
318 | /* TODO Probably use a different field than dev_addr so that the | |
319 | * mac-address on the virtual device is portable and can be carried | |
320 | * while the packets use the mac-addr on the physical device. | |
321 | */ | |
322 | return dev_hard_header(skb, phy_dev, type, daddr, | |
323 | saddr ? : dev->dev_addr, len); | |
324 | } | |
325 | ||
326 | static const struct header_ops ipvlan_header_ops = { | |
327 | .create = ipvlan_hard_header, | |
2ad7bf36 MB |
328 | .parse = eth_header_parse, |
329 | .cache = eth_header_cache, | |
330 | .cache_update = eth_header_cache_update, | |
331 | }; | |
332 | ||
314d10d7 DD |
333 | static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev, |
334 | struct ethtool_link_ksettings *cmd) | |
2ad7bf36 MB |
335 | { |
336 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
337 | ||
314d10d7 | 338 | return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd); |
2ad7bf36 MB |
339 | } |
340 | ||
341 | static void ipvlan_ethtool_get_drvinfo(struct net_device *dev, | |
342 | struct ethtool_drvinfo *drvinfo) | |
343 | { | |
344 | strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver)); | |
345 | strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version)); | |
346 | } | |
347 | ||
348 | static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev) | |
349 | { | |
350 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
351 | ||
352 | return ipvlan->msg_enable; | |
353 | } | |
354 | ||
355 | static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value) | |
356 | { | |
357 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
358 | ||
359 | ipvlan->msg_enable = value; | |
360 | } | |
361 | ||
362 | static const struct ethtool_ops ipvlan_ethtool_ops = { | |
363 | .get_link = ethtool_op_get_link, | |
314d10d7 | 364 | .get_link_ksettings = ipvlan_ethtool_get_link_ksettings, |
2ad7bf36 MB |
365 | .get_drvinfo = ipvlan_ethtool_get_drvinfo, |
366 | .get_msglevel = ipvlan_ethtool_get_msglevel, | |
367 | .set_msglevel = ipvlan_ethtool_set_msglevel, | |
368 | }; | |
369 | ||
370 | static int ipvlan_nl_changelink(struct net_device *dev, | |
371 | struct nlattr *tb[], struct nlattr *data[]) | |
372 | { | |
373 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
374 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
375 | ||
376 | if (data && data[IFLA_IPVLAN_MODE]) { | |
377 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
378 | ||
379 | ipvlan_set_port_mode(port, nmode); | |
380 | } | |
381 | return 0; | |
382 | } | |
383 | ||
384 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
385 | { | |
386 | return (0 | |
387 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
388 | ); | |
389 | } | |
390 | ||
391 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[]) | |
392 | { | |
393 | if (data && data[IFLA_IPVLAN_MODE]) { | |
394 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
395 | ||
396 | if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX) | |
397 | return -EINVAL; | |
398 | } | |
399 | return 0; | |
400 | } | |
401 | ||
402 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
403 | const struct net_device *dev) | |
404 | { | |
405 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
406 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
407 | int ret = -EINVAL; | |
408 | ||
409 | if (!port) | |
410 | goto err; | |
411 | ||
412 | ret = -EMSGSIZE; | |
413 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
414 | goto err; | |
415 | ||
416 | return 0; | |
417 | ||
418 | err: | |
419 | return ret; | |
420 | } | |
421 | ||
422 | static int ipvlan_link_new(struct net *src_net, struct net_device *dev, | |
423 | struct nlattr *tb[], struct nlattr *data[]) | |
424 | { | |
425 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
426 | struct ipvl_port *port; | |
427 | struct net_device *phy_dev; | |
428 | int err; | |
e93fbc5a | 429 | u16 mode = IPVLAN_MODE_L3; |
2ad7bf36 MB |
430 | |
431 | if (!tb[IFLA_LINK]) | |
432 | return -EINVAL; | |
433 | ||
434 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
435 | if (!phy_dev) | |
436 | return -ENODEV; | |
437 | ||
5933fea7 | 438 | if (netif_is_ipvlan(phy_dev)) { |
2ad7bf36 MB |
439 | struct ipvl_dev *tmp = netdev_priv(phy_dev); |
440 | ||
441 | phy_dev = tmp->phy_dev; | |
5933fea7 | 442 | } else if (!netif_is_ipvlan_port(phy_dev)) { |
2ad7bf36 MB |
443 | err = ipvlan_port_create(phy_dev); |
444 | if (err < 0) | |
445 | return err; | |
446 | } | |
447 | ||
2ad7bf36 | 448 | if (data && data[IFLA_IPVLAN_MODE]) |
e93fbc5a | 449 | mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
2ad7bf36 | 450 | |
e93fbc5a | 451 | port = ipvlan_port_get_rtnl(phy_dev); |
2ad7bf36 MB |
452 | ipvlan->phy_dev = phy_dev; |
453 | ipvlan->dev = dev; | |
454 | ipvlan->port = port; | |
455 | ipvlan->sfeatures = IPVLAN_FEATURES; | |
296d4856 | 456 | ipvlan_adjust_mtu(ipvlan, phy_dev); |
2ad7bf36 | 457 | INIT_LIST_HEAD(&ipvlan->addrs); |
2ad7bf36 MB |
458 | |
459 | /* TODO Probably put random address here to be presented to the | |
460 | * world but keep using the physical-dev address for the outgoing | |
461 | * packets. | |
462 | */ | |
463 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); | |
464 | ||
465 | dev->priv_flags |= IFF_IPVLAN_SLAVE; | |
466 | ||
2ad7bf36 MB |
467 | err = register_netdevice(dev); |
468 | if (err < 0) | |
494e8489 | 469 | return err; |
2ad7bf36 MB |
470 | |
471 | err = netdev_upper_dev_link(phy_dev, dev); | |
494e8489 MB |
472 | if (err) { |
473 | unregister_netdevice(dev); | |
474 | return err; | |
475 | } | |
2ad7bf36 MB |
476 | |
477 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
e93fbc5a MB |
478 | ipvlan_set_port_mode(port, mode); |
479 | ||
2ad7bf36 MB |
480 | netif_stacked_transfer_operstate(phy_dev, dev); |
481 | return 0; | |
2ad7bf36 MB |
482 | } |
483 | ||
484 | static void ipvlan_link_delete(struct net_device *dev, struct list_head *head) | |
485 | { | |
486 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
487 | struct ipvl_addr *addr, *next; | |
488 | ||
515866f8 | 489 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { |
6640e673 | 490 | ipvlan_ht_addr_del(addr); |
515866f8 | 491 | list_del(&addr->anode); |
6a725497 | 492 | kfree_rcu(addr, rcu); |
2ad7bf36 | 493 | } |
515866f8 | 494 | |
2ad7bf36 MB |
495 | list_del_rcu(&ipvlan->pnode); |
496 | unregister_netdevice_queue(dev, head); | |
497 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
498 | } | |
499 | ||
500 | static void ipvlan_link_setup(struct net_device *dev) | |
501 | { | |
502 | ether_setup(dev); | |
503 | ||
504 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); | |
bf485bcf | 505 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE; |
2ad7bf36 MB |
506 | dev->netdev_ops = &ipvlan_netdev_ops; |
507 | dev->destructor = free_netdev; | |
508 | dev->header_ops = &ipvlan_header_ops; | |
509 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
2ad7bf36 MB |
510 | } |
511 | ||
512 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
513 | { | |
514 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
515 | }; | |
516 | ||
517 | static struct rtnl_link_ops ipvlan_link_ops = { | |
518 | .kind = "ipvlan", | |
519 | .priv_size = sizeof(struct ipvl_dev), | |
520 | ||
521 | .get_size = ipvlan_nl_getsize, | |
522 | .policy = ipvlan_nl_policy, | |
523 | .validate = ipvlan_nl_validate, | |
524 | .fill_info = ipvlan_nl_fillinfo, | |
525 | .changelink = ipvlan_nl_changelink, | |
526 | .maxtype = IFLA_IPVLAN_MAX, | |
527 | ||
528 | .setup = ipvlan_link_setup, | |
529 | .newlink = ipvlan_link_new, | |
530 | .dellink = ipvlan_link_delete, | |
531 | }; | |
532 | ||
92c7b0de | 533 | static int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 MB |
534 | { |
535 | return rtnl_link_register(ops); | |
536 | } | |
537 | ||
538 | static int ipvlan_device_event(struct notifier_block *unused, | |
539 | unsigned long event, void *ptr) | |
540 | { | |
541 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
542 | struct ipvl_dev *ipvlan, *next; | |
543 | struct ipvl_port *port; | |
544 | LIST_HEAD(lst_kill); | |
545 | ||
5933fea7 | 546 | if (!netif_is_ipvlan_port(dev)) |
2ad7bf36 MB |
547 | return NOTIFY_DONE; |
548 | ||
549 | port = ipvlan_port_get_rtnl(dev); | |
550 | ||
551 | switch (event) { | |
552 | case NETDEV_CHANGE: | |
553 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
554 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
555 | ipvlan->dev); | |
556 | break; | |
557 | ||
558 | case NETDEV_UNREGISTER: | |
559 | if (dev->reg_state != NETREG_UNREGISTERING) | |
560 | break; | |
561 | ||
562 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, | |
563 | pnode) | |
564 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, | |
565 | &lst_kill); | |
566 | unregister_netdevice_many(&lst_kill); | |
567 | break; | |
568 | ||
569 | case NETDEV_FEAT_CHANGE: | |
570 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
571 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
572 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
f6773c5e | 573 | ipvlan->dev->gso_max_segs = dev->gso_max_segs; |
2ad7bf36 MB |
574 | netdev_features_change(ipvlan->dev); |
575 | } | |
576 | break; | |
577 | ||
578 | case NETDEV_CHANGEMTU: | |
579 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
580 | ipvlan_adjust_mtu(ipvlan, dev); | |
581 | break; | |
582 | ||
583 | case NETDEV_PRE_TYPE_CHANGE: | |
584 | /* Forbid underlying device to change its type. */ | |
585 | return NOTIFY_BAD; | |
586 | } | |
587 | return NOTIFY_DONE; | |
588 | } | |
589 | ||
590 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
591 | { | |
592 | struct ipvl_addr *addr; | |
593 | ||
e9997c29 | 594 | if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) { |
2ad7bf36 MB |
595 | netif_err(ipvlan, ifup, ipvlan->dev, |
596 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
597 | ip6_addr, ipvlan->dev->name); | |
598 | return -EINVAL; | |
599 | } | |
600 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); | |
601 | if (!addr) | |
602 | return -ENOMEM; | |
603 | ||
604 | addr->master = ipvlan; | |
605 | memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr)); | |
606 | addr->atype = IPVL_IPV6; | |
40891e8a | 607 | list_add_tail(&addr->anode, &ipvlan->addrs); |
515866f8 | 608 | |
27705f70 JB |
609 | /* If the interface is not up, the address will be added to the hash |
610 | * list by ipvlan_open. | |
611 | */ | |
612 | if (netif_running(ipvlan->dev)) | |
613 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
614 | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
619 | { | |
620 | struct ipvl_addr *addr; | |
621 | ||
e9997c29 | 622 | addr = ipvlan_find_addr(ipvlan, ip6_addr, true); |
2ad7bf36 MB |
623 | if (!addr) |
624 | return; | |
625 | ||
6640e673 | 626 | ipvlan_ht_addr_del(addr); |
40891e8a | 627 | list_del(&addr->anode); |
2ad7bf36 MB |
628 | kfree_rcu(addr, rcu); |
629 | ||
630 | return; | |
631 | } | |
632 | ||
633 | static int ipvlan_addr6_event(struct notifier_block *unused, | |
634 | unsigned long event, void *ptr) | |
635 | { | |
636 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
637 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
638 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
639 | ||
23a5a49c KK |
640 | /* FIXME IPv6 autoconf calls us from bh without RTNL */ |
641 | if (in_softirq()) | |
642 | return NOTIFY_DONE; | |
643 | ||
5933fea7 | 644 | if (!netif_is_ipvlan(dev)) |
2ad7bf36 MB |
645 | return NOTIFY_DONE; |
646 | ||
647 | if (!ipvlan || !ipvlan->port) | |
648 | return NOTIFY_DONE; | |
649 | ||
650 | switch (event) { | |
651 | case NETDEV_UP: | |
652 | if (ipvlan_add_addr6(ipvlan, &if6->addr)) | |
653 | return NOTIFY_BAD; | |
654 | break; | |
655 | ||
656 | case NETDEV_DOWN: | |
657 | ipvlan_del_addr6(ipvlan, &if6->addr); | |
658 | break; | |
659 | } | |
660 | ||
661 | return NOTIFY_OK; | |
662 | } | |
663 | ||
664 | static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
665 | { | |
666 | struct ipvl_addr *addr; | |
667 | ||
e9997c29 | 668 | if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) { |
2ad7bf36 MB |
669 | netif_err(ipvlan, ifup, ipvlan->dev, |
670 | "Failed to add IPv4=%pI4 on %s intf.\n", | |
671 | ip4_addr, ipvlan->dev->name); | |
672 | return -EINVAL; | |
673 | } | |
674 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL); | |
675 | if (!addr) | |
676 | return -ENOMEM; | |
677 | ||
678 | addr->master = ipvlan; | |
679 | memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr)); | |
680 | addr->atype = IPVL_IPV4; | |
40891e8a | 681 | list_add_tail(&addr->anode, &ipvlan->addrs); |
515866f8 | 682 | |
27705f70 JB |
683 | /* If the interface is not up, the address will be added to the hash |
684 | * list by ipvlan_open. | |
685 | */ | |
686 | if (netif_running(ipvlan->dev)) | |
687 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
688 | |
689 | return 0; | |
690 | } | |
691 | ||
692 | static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
693 | { | |
694 | struct ipvl_addr *addr; | |
695 | ||
e9997c29 | 696 | addr = ipvlan_find_addr(ipvlan, ip4_addr, false); |
2ad7bf36 MB |
697 | if (!addr) |
698 | return; | |
699 | ||
6640e673 | 700 | ipvlan_ht_addr_del(addr); |
40891e8a | 701 | list_del(&addr->anode); |
2ad7bf36 MB |
702 | kfree_rcu(addr, rcu); |
703 | ||
704 | return; | |
705 | } | |
706 | ||
707 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
708 | unsigned long event, void *ptr) | |
709 | { | |
710 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
711 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
712 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
713 | struct in_addr ip4_addr; | |
714 | ||
5933fea7 | 715 | if (!netif_is_ipvlan(dev)) |
2ad7bf36 MB |
716 | return NOTIFY_DONE; |
717 | ||
718 | if (!ipvlan || !ipvlan->port) | |
719 | return NOTIFY_DONE; | |
720 | ||
721 | switch (event) { | |
722 | case NETDEV_UP: | |
723 | ip4_addr.s_addr = if4->ifa_address; | |
724 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
725 | return NOTIFY_BAD; | |
726 | break; | |
727 | ||
728 | case NETDEV_DOWN: | |
729 | ip4_addr.s_addr = if4->ifa_address; | |
730 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
731 | break; | |
732 | } | |
733 | ||
734 | return NOTIFY_OK; | |
735 | } | |
736 | ||
737 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { | |
738 | .notifier_call = ipvlan_addr4_event, | |
739 | }; | |
740 | ||
741 | static struct notifier_block ipvlan_notifier_block __read_mostly = { | |
742 | .notifier_call = ipvlan_device_event, | |
743 | }; | |
744 | ||
745 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { | |
746 | .notifier_call = ipvlan_addr6_event, | |
747 | }; | |
748 | ||
749 | static int __init ipvlan_init_module(void) | |
750 | { | |
751 | int err; | |
752 | ||
753 | ipvlan_init_secret(); | |
754 | register_netdevice_notifier(&ipvlan_notifier_block); | |
755 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
756 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
757 | ||
758 | err = ipvlan_link_register(&ipvlan_link_ops); | |
759 | if (err < 0) | |
760 | goto error; | |
761 | ||
762 | return 0; | |
763 | error: | |
764 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
765 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
766 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
767 | return err; | |
768 | } | |
769 | ||
770 | static void __exit ipvlan_cleanup_module(void) | |
771 | { | |
772 | rtnl_link_unregister(&ipvlan_link_ops); | |
773 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
774 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
775 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
776 | } | |
777 | ||
778 | module_init(ipvlan_init_module); | |
779 | module_exit(ipvlan_cleanup_module); | |
780 | ||
781 | MODULE_LICENSE("GPL"); | |
782 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
783 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
784 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |