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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 | ||
4fbae7d8 MB |
12 | static u32 ipvl_nf_hook_refcnt = 0; |
13 | ||
14 | static struct nf_hook_ops ipvl_nfops[] __read_mostly = { | |
15 | { | |
16 | .hook = ipvlan_nf_input, | |
17 | .pf = NFPROTO_IPV4, | |
18 | .hooknum = NF_INET_LOCAL_IN, | |
19 | .priority = INT_MAX, | |
20 | }, | |
21 | { | |
22 | .hook = ipvlan_nf_input, | |
23 | .pf = NFPROTO_IPV6, | |
24 | .hooknum = NF_INET_LOCAL_IN, | |
25 | .priority = INT_MAX, | |
26 | }, | |
27 | }; | |
28 | ||
29 | static struct l3mdev_ops ipvl_l3mdev_ops __read_mostly = { | |
30 | .l3mdev_l3_rcv = ipvlan_l3_rcv, | |
31 | }; | |
32 | ||
ab5b7013 | 33 | static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev) |
2ad7bf36 MB |
34 | { |
35 | ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj; | |
36 | } | |
37 | ||
4fbae7d8 MB |
38 | static int ipvlan_register_nf_hook(void) |
39 | { | |
40 | int err = 0; | |
41 | ||
42 | if (!ipvl_nf_hook_refcnt) { | |
43 | err = _nf_register_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops)); | |
44 | if (!err) | |
45 | ipvl_nf_hook_refcnt = 1; | |
46 | } else { | |
47 | ipvl_nf_hook_refcnt++; | |
48 | } | |
49 | ||
50 | return err; | |
51 | } | |
52 | ||
53 | static void ipvlan_unregister_nf_hook(void) | |
54 | { | |
55 | WARN_ON(!ipvl_nf_hook_refcnt); | |
56 | ||
57 | ipvl_nf_hook_refcnt--; | |
58 | if (!ipvl_nf_hook_refcnt) | |
59 | _nf_unregister_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops)); | |
60 | } | |
61 | ||
62 | static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval) | |
2ad7bf36 MB |
63 | { |
64 | struct ipvl_dev *ipvlan; | |
4fbae7d8 MB |
65 | struct net_device *mdev = port->dev; |
66 | int err = 0; | |
2ad7bf36 | 67 | |
4fbae7d8 | 68 | ASSERT_RTNL(); |
2ad7bf36 | 69 | if (port->mode != nval) { |
4fbae7d8 MB |
70 | if (nval == IPVLAN_MODE_L3S) { |
71 | /* New mode is L3S */ | |
72 | err = ipvlan_register_nf_hook(); | |
73 | if (!err) { | |
74 | mdev->l3mdev_ops = &ipvl_l3mdev_ops; | |
75 | mdev->priv_flags |= IFF_L3MDEV_MASTER; | |
76 | } else | |
77 | return err; | |
78 | } else if (port->mode == IPVLAN_MODE_L3S) { | |
79 | /* Old mode was L3S */ | |
80 | mdev->priv_flags &= ~IFF_L3MDEV_MASTER; | |
81 | ipvlan_unregister_nf_hook(); | |
82 | mdev->l3mdev_ops = NULL; | |
83 | } | |
2ad7bf36 | 84 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
4fbae7d8 | 85 | if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S) |
2ad7bf36 MB |
86 | ipvlan->dev->flags |= IFF_NOARP; |
87 | else | |
88 | ipvlan->dev->flags &= ~IFF_NOARP; | |
89 | } | |
90 | port->mode = nval; | |
91 | } | |
4fbae7d8 | 92 | return err; |
2ad7bf36 MB |
93 | } |
94 | ||
95 | static int ipvlan_port_create(struct net_device *dev) | |
96 | { | |
97 | struct ipvl_port *port; | |
98 | int err, idx; | |
99 | ||
100 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) { | |
101 | netdev_err(dev, "Master is either lo or non-ether device\n"); | |
102 | return -EINVAL; | |
103 | } | |
764e433b MB |
104 | |
105 | if (netif_is_macvlan_port(dev)) { | |
106 | netdev_err(dev, "Master is a macvlan port.\n"); | |
107 | return -EBUSY; | |
108 | } | |
109 | ||
2ad7bf36 MB |
110 | port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL); |
111 | if (!port) | |
112 | return -ENOMEM; | |
113 | ||
114 | port->dev = dev; | |
115 | port->mode = IPVLAN_MODE_L3; | |
116 | INIT_LIST_HEAD(&port->ipvlans); | |
117 | for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++) | |
118 | INIT_HLIST_HEAD(&port->hlhead[idx]); | |
119 | ||
ba35f858 MB |
120 | skb_queue_head_init(&port->backlog); |
121 | INIT_WORK(&port->wq, ipvlan_process_multicast); | |
122 | ||
2ad7bf36 MB |
123 | err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port); |
124 | if (err) | |
125 | goto err; | |
126 | ||
127 | dev->priv_flags |= IFF_IPVLAN_MASTER; | |
128 | return 0; | |
129 | ||
130 | err: | |
131 | kfree_rcu(port, rcu); | |
132 | return err; | |
133 | } | |
134 | ||
135 | static void ipvlan_port_destroy(struct net_device *dev) | |
136 | { | |
137 | struct ipvl_port *port = ipvlan_port_get_rtnl(dev); | |
138 | ||
139 | dev->priv_flags &= ~IFF_IPVLAN_MASTER; | |
4fbae7d8 MB |
140 | if (port->mode == IPVLAN_MODE_L3S) { |
141 | dev->priv_flags &= ~IFF_L3MDEV_MASTER; | |
142 | ipvlan_unregister_nf_hook(); | |
143 | dev->l3mdev_ops = NULL; | |
144 | } | |
2ad7bf36 | 145 | netdev_rx_handler_unregister(dev); |
ba35f858 MB |
146 | cancel_work_sync(&port->wq); |
147 | __skb_queue_purge(&port->backlog); | |
2ad7bf36 MB |
148 | kfree_rcu(port, rcu); |
149 | } | |
150 | ||
2ad7bf36 | 151 | #define IPVLAN_FEATURES \ |
a188222b | 152 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
2ad7bf36 MB |
153 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ |
154 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ | |
155 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) | |
156 | ||
157 | #define IPVLAN_STATE_MASK \ | |
158 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
159 | ||
2ad7bf36 MB |
160 | static int ipvlan_init(struct net_device *dev) |
161 | { | |
162 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
163 | const struct net_device *phy_dev = ipvlan->phy_dev; | |
494e8489 | 164 | struct ipvl_port *port = ipvlan->port; |
2ad7bf36 MB |
165 | |
166 | dev->state = (dev->state & ~IPVLAN_STATE_MASK) | | |
167 | (phy_dev->state & IPVLAN_STATE_MASK); | |
168 | dev->features = phy_dev->features & IPVLAN_FEATURES; | |
169 | dev->features |= NETIF_F_LLTX; | |
170 | dev->gso_max_size = phy_dev->gso_max_size; | |
f6773c5e | 171 | dev->gso_max_segs = phy_dev->gso_max_segs; |
2ad7bf36 MB |
172 | dev->hard_header_len = phy_dev->hard_header_len; |
173 | ||
0d7dd798 | 174 | netdev_lockdep_set_classes(dev); |
2ad7bf36 MB |
175 | |
176 | ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats); | |
177 | if (!ipvlan->pcpu_stats) | |
178 | return -ENOMEM; | |
179 | ||
494e8489 MB |
180 | port->count += 1; |
181 | ||
2ad7bf36 MB |
182 | return 0; |
183 | } | |
184 | ||
185 | static void ipvlan_uninit(struct net_device *dev) | |
186 | { | |
187 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
188 | struct ipvl_port *port = ipvlan->port; | |
189 | ||
04901cea | 190 | free_percpu(ipvlan->pcpu_stats); |
2ad7bf36 MB |
191 | |
192 | port->count -= 1; | |
193 | if (!port->count) | |
194 | ipvlan_port_destroy(port->dev); | |
195 | } | |
196 | ||
197 | static int ipvlan_open(struct net_device *dev) | |
198 | { | |
199 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
200 | struct net_device *phy_dev = ipvlan->phy_dev; | |
201 | struct ipvl_addr *addr; | |
202 | ||
4fbae7d8 MB |
203 | if (ipvlan->port->mode == IPVLAN_MODE_L3 || |
204 | ipvlan->port->mode == IPVLAN_MODE_L3S) | |
2ad7bf36 MB |
205 | dev->flags |= IFF_NOARP; |
206 | else | |
207 | dev->flags &= ~IFF_NOARP; | |
208 | ||
515866f8 KK |
209 | list_for_each_entry(addr, &ipvlan->addrs, anode) |
210 | ipvlan_ht_addr_add(ipvlan, addr); | |
211 | ||
2ad7bf36 MB |
212 | return dev_uc_add(phy_dev, phy_dev->dev_addr); |
213 | } | |
214 | ||
215 | static int ipvlan_stop(struct net_device *dev) | |
216 | { | |
217 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
218 | struct net_device *phy_dev = ipvlan->phy_dev; | |
219 | struct ipvl_addr *addr; | |
220 | ||
221 | dev_uc_unsync(phy_dev, dev); | |
222 | dev_mc_unsync(phy_dev, dev); | |
223 | ||
224 | dev_uc_del(phy_dev, phy_dev->dev_addr); | |
225 | ||
515866f8 | 226 | list_for_each_entry(addr, &ipvlan->addrs, anode) |
6640e673 | 227 | ipvlan_ht_addr_del(addr); |
515866f8 | 228 | |
2ad7bf36 MB |
229 | return 0; |
230 | } | |
231 | ||
92c7b0de MB |
232 | static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, |
233 | struct net_device *dev) | |
2ad7bf36 MB |
234 | { |
235 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
236 | int skblen = skb->len; | |
237 | int ret; | |
238 | ||
239 | ret = ipvlan_queue_xmit(skb, dev); | |
240 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
241 | struct ipvl_pcpu_stats *pcptr; | |
242 | ||
243 | pcptr = this_cpu_ptr(ipvlan->pcpu_stats); | |
244 | ||
245 | u64_stats_update_begin(&pcptr->syncp); | |
246 | pcptr->tx_pkts++; | |
247 | pcptr->tx_bytes += skblen; | |
248 | u64_stats_update_end(&pcptr->syncp); | |
249 | } else { | |
250 | this_cpu_inc(ipvlan->pcpu_stats->tx_drps); | |
251 | } | |
252 | return ret; | |
253 | } | |
254 | ||
255 | static netdev_features_t ipvlan_fix_features(struct net_device *dev, | |
256 | netdev_features_t features) | |
257 | { | |
258 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
259 | ||
260 | return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES); | |
261 | } | |
262 | ||
263 | static void ipvlan_change_rx_flags(struct net_device *dev, int change) | |
264 | { | |
265 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
266 | struct net_device *phy_dev = ipvlan->phy_dev; | |
267 | ||
268 | if (change & IFF_ALLMULTI) | |
269 | dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1); | |
270 | } | |
271 | ||
2ad7bf36 MB |
272 | static void ipvlan_set_multicast_mac_filter(struct net_device *dev) |
273 | { | |
274 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
275 | ||
276 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { | |
277 | bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE); | |
278 | } else { | |
279 | struct netdev_hw_addr *ha; | |
280 | DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
281 | ||
282 | bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
283 | netdev_for_each_mc_addr(ha, dev) | |
284 | __set_bit(ipvlan_mac_hash(ha->addr), mc_filters); | |
285 | ||
f631c44b MB |
286 | /* Turn-on broadcast bit irrespective of address family, |
287 | * since broadcast is deferred to a work-queue, hence no | |
288 | * impact on fast-path processing. | |
289 | */ | |
290 | __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters); | |
291 | ||
2ad7bf36 MB |
292 | bitmap_copy(ipvlan->mac_filters, mc_filters, |
293 | IPVLAN_MAC_FILTER_SIZE); | |
294 | } | |
295 | dev_uc_sync(ipvlan->phy_dev, dev); | |
296 | dev_mc_sync(ipvlan->phy_dev, dev); | |
297 | } | |
298 | ||
299 | static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev, | |
300 | struct rtnl_link_stats64 *s) | |
301 | { | |
302 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
303 | ||
304 | if (ipvlan->pcpu_stats) { | |
305 | struct ipvl_pcpu_stats *pcptr; | |
306 | u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes; | |
307 | u32 rx_errs = 0, tx_drps = 0; | |
308 | u32 strt; | |
309 | int idx; | |
310 | ||
311 | for_each_possible_cpu(idx) { | |
312 | pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx); | |
313 | do { | |
314 | strt= u64_stats_fetch_begin_irq(&pcptr->syncp); | |
315 | rx_pkts = pcptr->rx_pkts; | |
316 | rx_bytes = pcptr->rx_bytes; | |
317 | rx_mcast = pcptr->rx_mcast; | |
318 | tx_pkts = pcptr->tx_pkts; | |
319 | tx_bytes = pcptr->tx_bytes; | |
320 | } while (u64_stats_fetch_retry_irq(&pcptr->syncp, | |
321 | strt)); | |
322 | ||
323 | s->rx_packets += rx_pkts; | |
324 | s->rx_bytes += rx_bytes; | |
325 | s->multicast += rx_mcast; | |
326 | s->tx_packets += tx_pkts; | |
327 | s->tx_bytes += tx_bytes; | |
328 | ||
329 | /* u32 values are updated without syncp protection. */ | |
330 | rx_errs += pcptr->rx_errs; | |
331 | tx_drps += pcptr->tx_drps; | |
332 | } | |
333 | s->rx_errors = rx_errs; | |
334 | s->rx_dropped = rx_errs; | |
335 | s->tx_dropped = tx_drps; | |
336 | } | |
337 | return s; | |
338 | } | |
339 | ||
340 | static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) | |
341 | { | |
342 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
343 | struct net_device *phy_dev = ipvlan->phy_dev; | |
344 | ||
345 | return vlan_vid_add(phy_dev, proto, vid); | |
346 | } | |
347 | ||
348 | static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, | |
349 | u16 vid) | |
350 | { | |
351 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
352 | struct net_device *phy_dev = ipvlan->phy_dev; | |
353 | ||
354 | vlan_vid_del(phy_dev, proto, vid); | |
355 | return 0; | |
356 | } | |
357 | ||
7c411658 ND |
358 | static int ipvlan_get_iflink(const struct net_device *dev) |
359 | { | |
360 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
361 | ||
362 | return ipvlan->phy_dev->ifindex; | |
363 | } | |
364 | ||
2ad7bf36 MB |
365 | static const struct net_device_ops ipvlan_netdev_ops = { |
366 | .ndo_init = ipvlan_init, | |
367 | .ndo_uninit = ipvlan_uninit, | |
368 | .ndo_open = ipvlan_open, | |
369 | .ndo_stop = ipvlan_stop, | |
370 | .ndo_start_xmit = ipvlan_start_xmit, | |
371 | .ndo_fix_features = ipvlan_fix_features, | |
372 | .ndo_change_rx_flags = ipvlan_change_rx_flags, | |
373 | .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter, | |
374 | .ndo_get_stats64 = ipvlan_get_stats64, | |
375 | .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid, | |
376 | .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid, | |
7c411658 | 377 | .ndo_get_iflink = ipvlan_get_iflink, |
2ad7bf36 MB |
378 | }; |
379 | ||
380 | static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
381 | unsigned short type, const void *daddr, | |
382 | const void *saddr, unsigned len) | |
383 | { | |
384 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
385 | struct net_device *phy_dev = ipvlan->phy_dev; | |
386 | ||
387 | /* TODO Probably use a different field than dev_addr so that the | |
388 | * mac-address on the virtual device is portable and can be carried | |
389 | * while the packets use the mac-addr on the physical device. | |
390 | */ | |
391 | return dev_hard_header(skb, phy_dev, type, daddr, | |
392 | saddr ? : dev->dev_addr, len); | |
393 | } | |
394 | ||
395 | static const struct header_ops ipvlan_header_ops = { | |
396 | .create = ipvlan_hard_header, | |
2ad7bf36 MB |
397 | .parse = eth_header_parse, |
398 | .cache = eth_header_cache, | |
399 | .cache_update = eth_header_cache_update, | |
400 | }; | |
401 | ||
314d10d7 DD |
402 | static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev, |
403 | struct ethtool_link_ksettings *cmd) | |
2ad7bf36 MB |
404 | { |
405 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
406 | ||
314d10d7 | 407 | return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd); |
2ad7bf36 MB |
408 | } |
409 | ||
410 | static void ipvlan_ethtool_get_drvinfo(struct net_device *dev, | |
411 | struct ethtool_drvinfo *drvinfo) | |
412 | { | |
413 | strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver)); | |
414 | strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version)); | |
415 | } | |
416 | ||
417 | static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev) | |
418 | { | |
419 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
420 | ||
421 | return ipvlan->msg_enable; | |
422 | } | |
423 | ||
424 | static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value) | |
425 | { | |
426 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
427 | ||
428 | ipvlan->msg_enable = value; | |
429 | } | |
430 | ||
431 | static const struct ethtool_ops ipvlan_ethtool_ops = { | |
432 | .get_link = ethtool_op_get_link, | |
314d10d7 | 433 | .get_link_ksettings = ipvlan_ethtool_get_link_ksettings, |
2ad7bf36 MB |
434 | .get_drvinfo = ipvlan_ethtool_get_drvinfo, |
435 | .get_msglevel = ipvlan_ethtool_get_msglevel, | |
436 | .set_msglevel = ipvlan_ethtool_set_msglevel, | |
437 | }; | |
438 | ||
439 | static int ipvlan_nl_changelink(struct net_device *dev, | |
440 | struct nlattr *tb[], struct nlattr *data[]) | |
441 | { | |
442 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
443 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
4fbae7d8 | 444 | int err = 0; |
2ad7bf36 MB |
445 | |
446 | if (data && data[IFLA_IPVLAN_MODE]) { | |
447 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
448 | ||
4fbae7d8 | 449 | err = ipvlan_set_port_mode(port, nmode); |
2ad7bf36 | 450 | } |
4fbae7d8 | 451 | return err; |
2ad7bf36 MB |
452 | } |
453 | ||
454 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
455 | { | |
456 | return (0 | |
457 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
458 | ); | |
459 | } | |
460 | ||
461 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[]) | |
462 | { | |
463 | if (data && data[IFLA_IPVLAN_MODE]) { | |
464 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
465 | ||
466 | if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX) | |
467 | return -EINVAL; | |
468 | } | |
469 | return 0; | |
470 | } | |
471 | ||
472 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
473 | const struct net_device *dev) | |
474 | { | |
475 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
476 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
477 | int ret = -EINVAL; | |
478 | ||
479 | if (!port) | |
480 | goto err; | |
481 | ||
482 | ret = -EMSGSIZE; | |
483 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
484 | goto err; | |
485 | ||
486 | return 0; | |
487 | ||
488 | err: | |
489 | return ret; | |
490 | } | |
491 | ||
492 | static int ipvlan_link_new(struct net *src_net, struct net_device *dev, | |
493 | struct nlattr *tb[], struct nlattr *data[]) | |
494 | { | |
495 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
496 | struct ipvl_port *port; | |
497 | struct net_device *phy_dev; | |
498 | int err; | |
e93fbc5a | 499 | u16 mode = IPVLAN_MODE_L3; |
147fd287 | 500 | bool create = false; |
2ad7bf36 MB |
501 | |
502 | if (!tb[IFLA_LINK]) | |
503 | return -EINVAL; | |
504 | ||
505 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
506 | if (!phy_dev) | |
507 | return -ENODEV; | |
508 | ||
5933fea7 | 509 | if (netif_is_ipvlan(phy_dev)) { |
2ad7bf36 MB |
510 | struct ipvl_dev *tmp = netdev_priv(phy_dev); |
511 | ||
512 | phy_dev = tmp->phy_dev; | |
5933fea7 | 513 | } else if (!netif_is_ipvlan_port(phy_dev)) { |
2ad7bf36 MB |
514 | err = ipvlan_port_create(phy_dev); |
515 | if (err < 0) | |
516 | return err; | |
147fd287 | 517 | create = true; |
2ad7bf36 MB |
518 | } |
519 | ||
2ad7bf36 | 520 | if (data && data[IFLA_IPVLAN_MODE]) |
e93fbc5a | 521 | mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
2ad7bf36 | 522 | |
e93fbc5a | 523 | port = ipvlan_port_get_rtnl(phy_dev); |
2ad7bf36 MB |
524 | ipvlan->phy_dev = phy_dev; |
525 | ipvlan->dev = dev; | |
526 | ipvlan->port = port; | |
527 | ipvlan->sfeatures = IPVLAN_FEATURES; | |
296d4856 | 528 | ipvlan_adjust_mtu(ipvlan, phy_dev); |
2ad7bf36 | 529 | INIT_LIST_HEAD(&ipvlan->addrs); |
2ad7bf36 MB |
530 | |
531 | /* TODO Probably put random address here to be presented to the | |
532 | * world but keep using the physical-dev address for the outgoing | |
533 | * packets. | |
534 | */ | |
535 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); | |
536 | ||
537 | dev->priv_flags |= IFF_IPVLAN_SLAVE; | |
538 | ||
2ad7bf36 MB |
539 | err = register_netdevice(dev); |
540 | if (err < 0) | |
147fd287 | 541 | goto destroy_ipvlan_port; |
2ad7bf36 MB |
542 | |
543 | err = netdev_upper_dev_link(phy_dev, dev); | |
494e8489 | 544 | if (err) { |
147fd287 | 545 | goto unregister_netdev; |
494e8489 | 546 | } |
4fbae7d8 MB |
547 | err = ipvlan_set_port_mode(port, mode); |
548 | if (err) { | |
147fd287 | 549 | goto unregister_netdev; |
4fbae7d8 | 550 | } |
2ad7bf36 MB |
551 | |
552 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
553 | netif_stacked_transfer_operstate(phy_dev, dev); | |
554 | return 0; | |
147fd287 GF |
555 | |
556 | unregister_netdev: | |
557 | unregister_netdevice(dev); | |
558 | destroy_ipvlan_port: | |
559 | if (create) | |
560 | ipvlan_port_destroy(phy_dev); | |
561 | return err; | |
2ad7bf36 MB |
562 | } |
563 | ||
564 | static void ipvlan_link_delete(struct net_device *dev, struct list_head *head) | |
565 | { | |
566 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
567 | struct ipvl_addr *addr, *next; | |
568 | ||
515866f8 | 569 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { |
6640e673 | 570 | ipvlan_ht_addr_del(addr); |
515866f8 | 571 | list_del(&addr->anode); |
6a725497 | 572 | kfree_rcu(addr, rcu); |
2ad7bf36 | 573 | } |
515866f8 | 574 | |
2ad7bf36 MB |
575 | list_del_rcu(&ipvlan->pnode); |
576 | unregister_netdevice_queue(dev, head); | |
577 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
578 | } | |
579 | ||
580 | static void ipvlan_link_setup(struct net_device *dev) | |
581 | { | |
582 | ether_setup(dev); | |
583 | ||
584 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); | |
bf485bcf | 585 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE; |
2ad7bf36 MB |
586 | dev->netdev_ops = &ipvlan_netdev_ops; |
587 | dev->destructor = free_netdev; | |
588 | dev->header_ops = &ipvlan_header_ops; | |
589 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
2ad7bf36 MB |
590 | } |
591 | ||
592 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
593 | { | |
594 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
595 | }; | |
596 | ||
597 | static struct rtnl_link_ops ipvlan_link_ops = { | |
598 | .kind = "ipvlan", | |
599 | .priv_size = sizeof(struct ipvl_dev), | |
600 | ||
601 | .get_size = ipvlan_nl_getsize, | |
602 | .policy = ipvlan_nl_policy, | |
603 | .validate = ipvlan_nl_validate, | |
604 | .fill_info = ipvlan_nl_fillinfo, | |
605 | .changelink = ipvlan_nl_changelink, | |
606 | .maxtype = IFLA_IPVLAN_MAX, | |
607 | ||
608 | .setup = ipvlan_link_setup, | |
609 | .newlink = ipvlan_link_new, | |
610 | .dellink = ipvlan_link_delete, | |
611 | }; | |
612 | ||
92c7b0de | 613 | static int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 MB |
614 | { |
615 | return rtnl_link_register(ops); | |
616 | } | |
617 | ||
618 | static int ipvlan_device_event(struct notifier_block *unused, | |
619 | unsigned long event, void *ptr) | |
620 | { | |
621 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
622 | struct ipvl_dev *ipvlan, *next; | |
623 | struct ipvl_port *port; | |
624 | LIST_HEAD(lst_kill); | |
625 | ||
5933fea7 | 626 | if (!netif_is_ipvlan_port(dev)) |
2ad7bf36 MB |
627 | return NOTIFY_DONE; |
628 | ||
629 | port = ipvlan_port_get_rtnl(dev); | |
630 | ||
631 | switch (event) { | |
632 | case NETDEV_CHANGE: | |
633 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
634 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
635 | ipvlan->dev); | |
636 | break; | |
637 | ||
638 | case NETDEV_UNREGISTER: | |
639 | if (dev->reg_state != NETREG_UNREGISTERING) | |
640 | break; | |
641 | ||
642 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, | |
643 | pnode) | |
644 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, | |
645 | &lst_kill); | |
646 | unregister_netdevice_many(&lst_kill); | |
647 | break; | |
648 | ||
649 | case NETDEV_FEAT_CHANGE: | |
650 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
651 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
652 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
f6773c5e | 653 | ipvlan->dev->gso_max_segs = dev->gso_max_segs; |
2ad7bf36 MB |
654 | netdev_features_change(ipvlan->dev); |
655 | } | |
656 | break; | |
657 | ||
658 | case NETDEV_CHANGEMTU: | |
659 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
660 | ipvlan_adjust_mtu(ipvlan, dev); | |
661 | break; | |
662 | ||
663 | case NETDEV_PRE_TYPE_CHANGE: | |
664 | /* Forbid underlying device to change its type. */ | |
665 | return NOTIFY_BAD; | |
666 | } | |
667 | return NOTIFY_DONE; | |
668 | } | |
669 | ||
670 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
671 | { | |
672 | struct ipvl_addr *addr; | |
673 | ||
e9997c29 | 674 | if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) { |
2ad7bf36 MB |
675 | netif_err(ipvlan, ifup, ipvlan->dev, |
676 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
677 | ip6_addr, ipvlan->dev->name); | |
678 | return -EINVAL; | |
679 | } | |
680 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); | |
681 | if (!addr) | |
682 | return -ENOMEM; | |
683 | ||
684 | addr->master = ipvlan; | |
685 | memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr)); | |
686 | addr->atype = IPVL_IPV6; | |
40891e8a | 687 | list_add_tail(&addr->anode, &ipvlan->addrs); |
515866f8 | 688 | |
27705f70 JB |
689 | /* If the interface is not up, the address will be added to the hash |
690 | * list by ipvlan_open. | |
691 | */ | |
692 | if (netif_running(ipvlan->dev)) | |
693 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
694 | |
695 | return 0; | |
696 | } | |
697 | ||
698 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
699 | { | |
700 | struct ipvl_addr *addr; | |
701 | ||
e9997c29 | 702 | addr = ipvlan_find_addr(ipvlan, ip6_addr, true); |
2ad7bf36 MB |
703 | if (!addr) |
704 | return; | |
705 | ||
6640e673 | 706 | ipvlan_ht_addr_del(addr); |
40891e8a | 707 | list_del(&addr->anode); |
2ad7bf36 MB |
708 | kfree_rcu(addr, rcu); |
709 | ||
710 | return; | |
711 | } | |
712 | ||
713 | static int ipvlan_addr6_event(struct notifier_block *unused, | |
714 | unsigned long event, void *ptr) | |
715 | { | |
716 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
717 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
718 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
719 | ||
23a5a49c KK |
720 | /* FIXME IPv6 autoconf calls us from bh without RTNL */ |
721 | if (in_softirq()) | |
722 | return NOTIFY_DONE; | |
723 | ||
5933fea7 | 724 | if (!netif_is_ipvlan(dev)) |
2ad7bf36 MB |
725 | return NOTIFY_DONE; |
726 | ||
727 | if (!ipvlan || !ipvlan->port) | |
728 | return NOTIFY_DONE; | |
729 | ||
730 | switch (event) { | |
731 | case NETDEV_UP: | |
732 | if (ipvlan_add_addr6(ipvlan, &if6->addr)) | |
733 | return NOTIFY_BAD; | |
734 | break; | |
735 | ||
736 | case NETDEV_DOWN: | |
737 | ipvlan_del_addr6(ipvlan, &if6->addr); | |
738 | break; | |
739 | } | |
740 | ||
741 | return NOTIFY_OK; | |
742 | } | |
743 | ||
744 | static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
745 | { | |
746 | struct ipvl_addr *addr; | |
747 | ||
e9997c29 | 748 | if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) { |
2ad7bf36 MB |
749 | netif_err(ipvlan, ifup, ipvlan->dev, |
750 | "Failed to add IPv4=%pI4 on %s intf.\n", | |
751 | ip4_addr, ipvlan->dev->name); | |
752 | return -EINVAL; | |
753 | } | |
754 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL); | |
755 | if (!addr) | |
756 | return -ENOMEM; | |
757 | ||
758 | addr->master = ipvlan; | |
759 | memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr)); | |
760 | addr->atype = IPVL_IPV4; | |
40891e8a | 761 | list_add_tail(&addr->anode, &ipvlan->addrs); |
515866f8 | 762 | |
27705f70 JB |
763 | /* If the interface is not up, the address will be added to the hash |
764 | * list by ipvlan_open. | |
765 | */ | |
766 | if (netif_running(ipvlan->dev)) | |
767 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
768 | |
769 | return 0; | |
770 | } | |
771 | ||
772 | static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
773 | { | |
774 | struct ipvl_addr *addr; | |
775 | ||
e9997c29 | 776 | addr = ipvlan_find_addr(ipvlan, ip4_addr, false); |
2ad7bf36 MB |
777 | if (!addr) |
778 | return; | |
779 | ||
6640e673 | 780 | ipvlan_ht_addr_del(addr); |
40891e8a | 781 | list_del(&addr->anode); |
2ad7bf36 MB |
782 | kfree_rcu(addr, rcu); |
783 | ||
784 | return; | |
785 | } | |
786 | ||
787 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
788 | unsigned long event, void *ptr) | |
789 | { | |
790 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
791 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
792 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
793 | struct in_addr ip4_addr; | |
794 | ||
5933fea7 | 795 | if (!netif_is_ipvlan(dev)) |
2ad7bf36 MB |
796 | return NOTIFY_DONE; |
797 | ||
798 | if (!ipvlan || !ipvlan->port) | |
799 | return NOTIFY_DONE; | |
800 | ||
801 | switch (event) { | |
802 | case NETDEV_UP: | |
803 | ip4_addr.s_addr = if4->ifa_address; | |
804 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
805 | return NOTIFY_BAD; | |
806 | break; | |
807 | ||
808 | case NETDEV_DOWN: | |
809 | ip4_addr.s_addr = if4->ifa_address; | |
810 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
811 | break; | |
812 | } | |
813 | ||
814 | return NOTIFY_OK; | |
815 | } | |
816 | ||
817 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { | |
818 | .notifier_call = ipvlan_addr4_event, | |
819 | }; | |
820 | ||
821 | static struct notifier_block ipvlan_notifier_block __read_mostly = { | |
822 | .notifier_call = ipvlan_device_event, | |
823 | }; | |
824 | ||
825 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { | |
826 | .notifier_call = ipvlan_addr6_event, | |
827 | }; | |
828 | ||
829 | static int __init ipvlan_init_module(void) | |
830 | { | |
831 | int err; | |
832 | ||
833 | ipvlan_init_secret(); | |
834 | register_netdevice_notifier(&ipvlan_notifier_block); | |
835 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
836 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
837 | ||
838 | err = ipvlan_link_register(&ipvlan_link_ops); | |
839 | if (err < 0) | |
840 | goto error; | |
841 | ||
842 | return 0; | |
843 | error: | |
844 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
845 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
846 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
847 | return err; | |
848 | } | |
849 | ||
850 | static void __exit ipvlan_cleanup_module(void) | |
851 | { | |
852 | rtnl_link_unregister(&ipvlan_link_ops); | |
853 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
854 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
855 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
856 | } | |
857 | ||
858 | module_init(ipvlan_init_module); | |
859 | module_exit(ipvlan_cleanup_module); | |
860 | ||
861 | MODULE_LICENSE("GPL"); | |
862 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
863 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
864 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |