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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 | ||
3133822f FW |
12 | static unsigned int ipvlan_netid __read_mostly; |
13 | ||
14 | struct ipvlan_netns { | |
15 | unsigned int ipvl_nf_hook_refcnt; | |
16 | }; | |
4fbae7d8 | 17 | |
591bb278 | 18 | static const struct nf_hook_ops ipvl_nfops[] = { |
4fbae7d8 MB |
19 | { |
20 | .hook = ipvlan_nf_input, | |
21 | .pf = NFPROTO_IPV4, | |
22 | .hooknum = NF_INET_LOCAL_IN, | |
23 | .priority = INT_MAX, | |
24 | }, | |
94333fac | 25 | #if IS_ENABLED(CONFIG_IPV6) |
4fbae7d8 MB |
26 | { |
27 | .hook = ipvlan_nf_input, | |
28 | .pf = NFPROTO_IPV6, | |
29 | .hooknum = NF_INET_LOCAL_IN, | |
30 | .priority = INT_MAX, | |
31 | }, | |
94333fac | 32 | #endif |
4fbae7d8 MB |
33 | }; |
34 | ||
ab530f63 | 35 | static const struct l3mdev_ops ipvl_l3mdev_ops = { |
4fbae7d8 MB |
36 | .l3mdev_l3_rcv = ipvlan_l3_rcv, |
37 | }; | |
38 | ||
ab5b7013 | 39 | static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev) |
2ad7bf36 | 40 | { |
8f679ed8 | 41 | ipvlan->dev->mtu = dev->mtu; |
2ad7bf36 MB |
42 | } |
43 | ||
3133822f | 44 | static int ipvlan_register_nf_hook(struct net *net) |
4fbae7d8 | 45 | { |
3133822f | 46 | struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid); |
4fbae7d8 MB |
47 | int err = 0; |
48 | ||
3133822f FW |
49 | if (!vnet->ipvl_nf_hook_refcnt) { |
50 | err = nf_register_net_hooks(net, ipvl_nfops, | |
51 | ARRAY_SIZE(ipvl_nfops)); | |
4fbae7d8 | 52 | if (!err) |
3133822f | 53 | vnet->ipvl_nf_hook_refcnt = 1; |
4fbae7d8 | 54 | } else { |
3133822f | 55 | vnet->ipvl_nf_hook_refcnt++; |
4fbae7d8 MB |
56 | } |
57 | ||
58 | return err; | |
59 | } | |
60 | ||
3133822f | 61 | static void ipvlan_unregister_nf_hook(struct net *net) |
4fbae7d8 | 62 | { |
3133822f FW |
63 | struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid); |
64 | ||
65 | if (WARN_ON(!vnet->ipvl_nf_hook_refcnt)) | |
66 | return; | |
4fbae7d8 | 67 | |
3133822f FW |
68 | vnet->ipvl_nf_hook_refcnt--; |
69 | if (!vnet->ipvl_nf_hook_refcnt) | |
70 | nf_unregister_net_hooks(net, ipvl_nfops, | |
71 | ARRAY_SIZE(ipvl_nfops)); | |
4fbae7d8 MB |
72 | } |
73 | ||
74 | static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval) | |
2ad7bf36 MB |
75 | { |
76 | struct ipvl_dev *ipvlan; | |
4fbae7d8 MB |
77 | struct net_device *mdev = port->dev; |
78 | int err = 0; | |
2ad7bf36 | 79 | |
4fbae7d8 | 80 | ASSERT_RTNL(); |
2ad7bf36 | 81 | if (port->mode != nval) { |
4fbae7d8 MB |
82 | if (nval == IPVLAN_MODE_L3S) { |
83 | /* New mode is L3S */ | |
3133822f | 84 | err = ipvlan_register_nf_hook(read_pnet(&port->pnet)); |
4fbae7d8 MB |
85 | if (!err) { |
86 | mdev->l3mdev_ops = &ipvl_l3mdev_ops; | |
87 | mdev->priv_flags |= IFF_L3MDEV_MASTER; | |
88 | } else | |
89 | return err; | |
90 | } else if (port->mode == IPVLAN_MODE_L3S) { | |
91 | /* Old mode was L3S */ | |
92 | mdev->priv_flags &= ~IFF_L3MDEV_MASTER; | |
3133822f | 93 | ipvlan_unregister_nf_hook(read_pnet(&port->pnet)); |
4fbae7d8 MB |
94 | mdev->l3mdev_ops = NULL; |
95 | } | |
2ad7bf36 | 96 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
4fbae7d8 | 97 | if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S) |
2ad7bf36 MB |
98 | ipvlan->dev->flags |= IFF_NOARP; |
99 | else | |
100 | ipvlan->dev->flags &= ~IFF_NOARP; | |
101 | } | |
102 | port->mode = nval; | |
103 | } | |
4fbae7d8 | 104 | return err; |
2ad7bf36 MB |
105 | } |
106 | ||
107 | static int ipvlan_port_create(struct net_device *dev) | |
108 | { | |
109 | struct ipvl_port *port; | |
110 | int err, idx; | |
111 | ||
2ad7bf36 MB |
112 | port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL); |
113 | if (!port) | |
114 | return -ENOMEM; | |
115 | ||
3133822f | 116 | write_pnet(&port->pnet, dev_net(dev)); |
2ad7bf36 MB |
117 | port->dev = dev; |
118 | port->mode = IPVLAN_MODE_L3; | |
119 | INIT_LIST_HEAD(&port->ipvlans); | |
120 | for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++) | |
121 | INIT_HLIST_HEAD(&port->hlhead[idx]); | |
122 | ||
ba35f858 MB |
123 | skb_queue_head_init(&port->backlog); |
124 | INIT_WORK(&port->wq, ipvlan_process_multicast); | |
009146d1 | 125 | ida_init(&port->ida); |
da36e13c | 126 | port->dev_id_start = 1; |
ba35f858 | 127 | |
2ad7bf36 MB |
128 | err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port); |
129 | if (err) | |
130 | goto err; | |
131 | ||
132 | dev->priv_flags |= IFF_IPVLAN_MASTER; | |
133 | return 0; | |
134 | ||
135 | err: | |
48140a21 | 136 | kfree(port); |
2ad7bf36 MB |
137 | return err; |
138 | } | |
139 | ||
140 | static void ipvlan_port_destroy(struct net_device *dev) | |
141 | { | |
142 | struct ipvl_port *port = ipvlan_port_get_rtnl(dev); | |
b1227d01 | 143 | struct sk_buff *skb; |
2ad7bf36 MB |
144 | |
145 | dev->priv_flags &= ~IFF_IPVLAN_MASTER; | |
4fbae7d8 MB |
146 | if (port->mode == IPVLAN_MODE_L3S) { |
147 | dev->priv_flags &= ~IFF_L3MDEV_MASTER; | |
3133822f | 148 | ipvlan_unregister_nf_hook(dev_net(dev)); |
4fbae7d8 MB |
149 | dev->l3mdev_ops = NULL; |
150 | } | |
2ad7bf36 | 151 | netdev_rx_handler_unregister(dev); |
ba35f858 | 152 | cancel_work_sync(&port->wq); |
b1227d01 ED |
153 | while ((skb = __skb_dequeue(&port->backlog)) != NULL) { |
154 | if (skb->dev) | |
155 | dev_put(skb->dev); | |
156 | kfree_skb(skb); | |
157 | } | |
009146d1 | 158 | ida_destroy(&port->ida); |
48140a21 | 159 | kfree(port); |
2ad7bf36 MB |
160 | } |
161 | ||
2ad7bf36 | 162 | #define IPVLAN_FEATURES \ |
a188222b | 163 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
182e0b6b | 164 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_GSO_ROBUST | \ |
2ad7bf36 MB |
165 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
166 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) | |
167 | ||
168 | #define IPVLAN_STATE_MASK \ | |
169 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
170 | ||
2ad7bf36 MB |
171 | static int ipvlan_init(struct net_device *dev) |
172 | { | |
173 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
fe18da60 GM |
174 | struct net_device *phy_dev = ipvlan->phy_dev; |
175 | struct ipvl_port *port; | |
176 | int err; | |
2ad7bf36 MB |
177 | |
178 | dev->state = (dev->state & ~IPVLAN_STATE_MASK) | | |
179 | (phy_dev->state & IPVLAN_STATE_MASK); | |
180 | dev->features = phy_dev->features & IPVLAN_FEATURES; | |
181 | dev->features |= NETIF_F_LLTX; | |
182 | dev->gso_max_size = phy_dev->gso_max_size; | |
f6773c5e | 183 | dev->gso_max_segs = phy_dev->gso_max_segs; |
2ad7bf36 MB |
184 | dev->hard_header_len = phy_dev->hard_header_len; |
185 | ||
0d7dd798 | 186 | netdev_lockdep_set_classes(dev); |
2ad7bf36 | 187 | |
87173cd6 | 188 | ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats); |
2ad7bf36 MB |
189 | if (!ipvlan->pcpu_stats) |
190 | return -ENOMEM; | |
191 | ||
fe18da60 GM |
192 | if (!netif_is_ipvlan_port(phy_dev)) { |
193 | err = ipvlan_port_create(phy_dev); | |
194 | if (err < 0) { | |
195 | free_percpu(ipvlan->pcpu_stats); | |
196 | return err; | |
197 | } | |
198 | } | |
199 | port = ipvlan_port_get_rtnl(phy_dev); | |
494e8489 | 200 | port->count += 1; |
2ad7bf36 MB |
201 | return 0; |
202 | } | |
203 | ||
204 | static void ipvlan_uninit(struct net_device *dev) | |
205 | { | |
206 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
fe18da60 GM |
207 | struct net_device *phy_dev = ipvlan->phy_dev; |
208 | struct ipvl_port *port; | |
2ad7bf36 | 209 | |
04901cea | 210 | free_percpu(ipvlan->pcpu_stats); |
2ad7bf36 | 211 | |
fe18da60 | 212 | port = ipvlan_port_get_rtnl(phy_dev); |
2ad7bf36 MB |
213 | port->count -= 1; |
214 | if (!port->count) | |
215 | ipvlan_port_destroy(port->dev); | |
216 | } | |
217 | ||
218 | static int ipvlan_open(struct net_device *dev) | |
219 | { | |
220 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
221 | struct net_device *phy_dev = ipvlan->phy_dev; | |
222 | struct ipvl_addr *addr; | |
223 | ||
4fbae7d8 MB |
224 | if (ipvlan->port->mode == IPVLAN_MODE_L3 || |
225 | ipvlan->port->mode == IPVLAN_MODE_L3S) | |
2ad7bf36 MB |
226 | dev->flags |= IFF_NOARP; |
227 | else | |
228 | dev->flags &= ~IFF_NOARP; | |
229 | ||
515866f8 KK |
230 | list_for_each_entry(addr, &ipvlan->addrs, anode) |
231 | ipvlan_ht_addr_add(ipvlan, addr); | |
232 | ||
2ad7bf36 MB |
233 | return dev_uc_add(phy_dev, phy_dev->dev_addr); |
234 | } | |
235 | ||
236 | static int ipvlan_stop(struct net_device *dev) | |
237 | { | |
238 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
239 | struct net_device *phy_dev = ipvlan->phy_dev; | |
240 | struct ipvl_addr *addr; | |
241 | ||
242 | dev_uc_unsync(phy_dev, dev); | |
243 | dev_mc_unsync(phy_dev, dev); | |
244 | ||
245 | dev_uc_del(phy_dev, phy_dev->dev_addr); | |
246 | ||
515866f8 | 247 | list_for_each_entry(addr, &ipvlan->addrs, anode) |
6640e673 | 248 | ipvlan_ht_addr_del(addr); |
515866f8 | 249 | |
2ad7bf36 MB |
250 | return 0; |
251 | } | |
252 | ||
92c7b0de MB |
253 | static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, |
254 | struct net_device *dev) | |
2ad7bf36 MB |
255 | { |
256 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
257 | int skblen = skb->len; | |
258 | int ret; | |
259 | ||
260 | ret = ipvlan_queue_xmit(skb, dev); | |
261 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
262 | struct ipvl_pcpu_stats *pcptr; | |
263 | ||
264 | pcptr = this_cpu_ptr(ipvlan->pcpu_stats); | |
265 | ||
266 | u64_stats_update_begin(&pcptr->syncp); | |
267 | pcptr->tx_pkts++; | |
268 | pcptr->tx_bytes += skblen; | |
269 | u64_stats_update_end(&pcptr->syncp); | |
270 | } else { | |
271 | this_cpu_inc(ipvlan->pcpu_stats->tx_drps); | |
272 | } | |
273 | return ret; | |
274 | } | |
275 | ||
276 | static netdev_features_t ipvlan_fix_features(struct net_device *dev, | |
277 | netdev_features_t features) | |
278 | { | |
279 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
280 | ||
281 | return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES); | |
282 | } | |
283 | ||
284 | static void ipvlan_change_rx_flags(struct net_device *dev, int change) | |
285 | { | |
286 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
287 | struct net_device *phy_dev = ipvlan->phy_dev; | |
288 | ||
289 | if (change & IFF_ALLMULTI) | |
290 | dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1); | |
291 | } | |
292 | ||
2ad7bf36 MB |
293 | static void ipvlan_set_multicast_mac_filter(struct net_device *dev) |
294 | { | |
295 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
296 | ||
297 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { | |
298 | bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE); | |
299 | } else { | |
300 | struct netdev_hw_addr *ha; | |
301 | DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
302 | ||
303 | bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
304 | netdev_for_each_mc_addr(ha, dev) | |
305 | __set_bit(ipvlan_mac_hash(ha->addr), mc_filters); | |
306 | ||
f631c44b MB |
307 | /* Turn-on broadcast bit irrespective of address family, |
308 | * since broadcast is deferred to a work-queue, hence no | |
309 | * impact on fast-path processing. | |
310 | */ | |
311 | __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters); | |
312 | ||
2ad7bf36 MB |
313 | bitmap_copy(ipvlan->mac_filters, mc_filters, |
314 | IPVLAN_MAC_FILTER_SIZE); | |
315 | } | |
316 | dev_uc_sync(ipvlan->phy_dev, dev); | |
317 | dev_mc_sync(ipvlan->phy_dev, dev); | |
318 | } | |
319 | ||
bc1f4470 | 320 | static void ipvlan_get_stats64(struct net_device *dev, |
321 | struct rtnl_link_stats64 *s) | |
2ad7bf36 MB |
322 | { |
323 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
324 | ||
325 | if (ipvlan->pcpu_stats) { | |
326 | struct ipvl_pcpu_stats *pcptr; | |
327 | u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes; | |
328 | u32 rx_errs = 0, tx_drps = 0; | |
329 | u32 strt; | |
330 | int idx; | |
331 | ||
332 | for_each_possible_cpu(idx) { | |
333 | pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx); | |
334 | do { | |
335 | strt= u64_stats_fetch_begin_irq(&pcptr->syncp); | |
336 | rx_pkts = pcptr->rx_pkts; | |
337 | rx_bytes = pcptr->rx_bytes; | |
338 | rx_mcast = pcptr->rx_mcast; | |
339 | tx_pkts = pcptr->tx_pkts; | |
340 | tx_bytes = pcptr->tx_bytes; | |
341 | } while (u64_stats_fetch_retry_irq(&pcptr->syncp, | |
342 | strt)); | |
343 | ||
344 | s->rx_packets += rx_pkts; | |
345 | s->rx_bytes += rx_bytes; | |
346 | s->multicast += rx_mcast; | |
347 | s->tx_packets += tx_pkts; | |
348 | s->tx_bytes += tx_bytes; | |
349 | ||
350 | /* u32 values are updated without syncp protection. */ | |
351 | rx_errs += pcptr->rx_errs; | |
352 | tx_drps += pcptr->tx_drps; | |
353 | } | |
354 | s->rx_errors = rx_errs; | |
355 | s->rx_dropped = rx_errs; | |
356 | s->tx_dropped = tx_drps; | |
357 | } | |
2ad7bf36 MB |
358 | } |
359 | ||
360 | static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) | |
361 | { | |
362 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
363 | struct net_device *phy_dev = ipvlan->phy_dev; | |
364 | ||
365 | return vlan_vid_add(phy_dev, proto, vid); | |
366 | } | |
367 | ||
368 | static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, | |
369 | u16 vid) | |
370 | { | |
371 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
372 | struct net_device *phy_dev = ipvlan->phy_dev; | |
373 | ||
374 | vlan_vid_del(phy_dev, proto, vid); | |
375 | return 0; | |
376 | } | |
377 | ||
7c411658 ND |
378 | static int ipvlan_get_iflink(const struct net_device *dev) |
379 | { | |
380 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
381 | ||
382 | return ipvlan->phy_dev->ifindex; | |
383 | } | |
384 | ||
2ad7bf36 MB |
385 | static const struct net_device_ops ipvlan_netdev_ops = { |
386 | .ndo_init = ipvlan_init, | |
387 | .ndo_uninit = ipvlan_uninit, | |
388 | .ndo_open = ipvlan_open, | |
389 | .ndo_stop = ipvlan_stop, | |
390 | .ndo_start_xmit = ipvlan_start_xmit, | |
391 | .ndo_fix_features = ipvlan_fix_features, | |
392 | .ndo_change_rx_flags = ipvlan_change_rx_flags, | |
393 | .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter, | |
394 | .ndo_get_stats64 = ipvlan_get_stats64, | |
395 | .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid, | |
396 | .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid, | |
7c411658 | 397 | .ndo_get_iflink = ipvlan_get_iflink, |
2ad7bf36 MB |
398 | }; |
399 | ||
400 | static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
401 | unsigned short type, const void *daddr, | |
402 | const void *saddr, unsigned len) | |
403 | { | |
404 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
405 | struct net_device *phy_dev = ipvlan->phy_dev; | |
406 | ||
407 | /* TODO Probably use a different field than dev_addr so that the | |
408 | * mac-address on the virtual device is portable and can be carried | |
409 | * while the packets use the mac-addr on the physical device. | |
410 | */ | |
411 | return dev_hard_header(skb, phy_dev, type, daddr, | |
32c10bbf | 412 | saddr ? : phy_dev->dev_addr, len); |
2ad7bf36 MB |
413 | } |
414 | ||
415 | static const struct header_ops ipvlan_header_ops = { | |
416 | .create = ipvlan_hard_header, | |
2ad7bf36 MB |
417 | .parse = eth_header_parse, |
418 | .cache = eth_header_cache, | |
419 | .cache_update = eth_header_cache_update, | |
420 | }; | |
421 | ||
314d10d7 DD |
422 | static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev, |
423 | struct ethtool_link_ksettings *cmd) | |
2ad7bf36 MB |
424 | { |
425 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
426 | ||
314d10d7 | 427 | return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd); |
2ad7bf36 MB |
428 | } |
429 | ||
430 | static void ipvlan_ethtool_get_drvinfo(struct net_device *dev, | |
431 | struct ethtool_drvinfo *drvinfo) | |
432 | { | |
433 | strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver)); | |
434 | strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version)); | |
435 | } | |
436 | ||
437 | static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev) | |
438 | { | |
439 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
440 | ||
441 | return ipvlan->msg_enable; | |
442 | } | |
443 | ||
444 | static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value) | |
445 | { | |
446 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
447 | ||
448 | ipvlan->msg_enable = value; | |
449 | } | |
450 | ||
451 | static const struct ethtool_ops ipvlan_ethtool_ops = { | |
452 | .get_link = ethtool_op_get_link, | |
314d10d7 | 453 | .get_link_ksettings = ipvlan_ethtool_get_link_ksettings, |
2ad7bf36 MB |
454 | .get_drvinfo = ipvlan_ethtool_get_drvinfo, |
455 | .get_msglevel = ipvlan_ethtool_get_msglevel, | |
456 | .set_msglevel = ipvlan_ethtool_set_msglevel, | |
457 | }; | |
458 | ||
459 | static int ipvlan_nl_changelink(struct net_device *dev, | |
ad744b22 MS |
460 | struct nlattr *tb[], struct nlattr *data[], |
461 | struct netlink_ext_ack *extack) | |
2ad7bf36 MB |
462 | { |
463 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
464 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
4fbae7d8 | 465 | int err = 0; |
2ad7bf36 | 466 | |
a190d04d MB |
467 | if (!data) |
468 | return 0; | |
469 | ||
470 | if (data[IFLA_IPVLAN_MODE]) { | |
2ad7bf36 MB |
471 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
472 | ||
4fbae7d8 | 473 | err = ipvlan_set_port_mode(port, nmode); |
2ad7bf36 | 474 | } |
a190d04d MB |
475 | |
476 | if (!err && data[IFLA_IPVLAN_FLAGS]) { | |
477 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
478 | ||
479 | if (flags & IPVLAN_F_PRIVATE) | |
480 | ipvlan_mark_private(port); | |
481 | else | |
482 | ipvlan_clear_private(port); | |
fe89aa6b MB |
483 | |
484 | if (flags & IPVLAN_F_VEPA) | |
485 | ipvlan_mark_vepa(port); | |
486 | else | |
487 | ipvlan_clear_vepa(port); | |
a190d04d MB |
488 | } |
489 | ||
4fbae7d8 | 490 | return err; |
2ad7bf36 MB |
491 | } |
492 | ||
493 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
494 | { | |
495 | return (0 | |
496 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
a190d04d | 497 | + nla_total_size(2) /* IFLA_IPVLAN_FLAGS */ |
2ad7bf36 MB |
498 | ); |
499 | } | |
500 | ||
a8b8a889 MS |
501 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[], |
502 | struct netlink_ext_ack *extack) | |
2ad7bf36 | 503 | { |
a190d04d MB |
504 | if (!data) |
505 | return 0; | |
506 | ||
507 | if (data[IFLA_IPVLAN_MODE]) { | |
2ad7bf36 MB |
508 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
509 | ||
510 | if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX) | |
511 | return -EINVAL; | |
512 | } | |
a190d04d MB |
513 | if (data[IFLA_IPVLAN_FLAGS]) { |
514 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
515 | ||
fe89aa6b MB |
516 | /* Only two bits are used at this moment. */ |
517 | if (flags & ~(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
518 | return -EINVAL; | |
519 | /* Also both flags can't be active at the same time. */ | |
520 | if ((flags & (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) == | |
521 | (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
a190d04d MB |
522 | return -EINVAL; |
523 | } | |
524 | ||
2ad7bf36 MB |
525 | return 0; |
526 | } | |
527 | ||
528 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
529 | const struct net_device *dev) | |
530 | { | |
531 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
532 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
533 | int ret = -EINVAL; | |
534 | ||
535 | if (!port) | |
536 | goto err; | |
537 | ||
538 | ret = -EMSGSIZE; | |
539 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
540 | goto err; | |
a190d04d MB |
541 | if (nla_put_u16(skb, IFLA_IPVLAN_FLAGS, port->flags)) |
542 | goto err; | |
2ad7bf36 MB |
543 | |
544 | return 0; | |
545 | ||
546 | err: | |
547 | return ret; | |
548 | } | |
549 | ||
235a9d89 | 550 | int ipvlan_link_new(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
551 | struct nlattr *tb[], struct nlattr *data[], |
552 | struct netlink_ext_ack *extack) | |
2ad7bf36 MB |
553 | { |
554 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
555 | struct ipvl_port *port; | |
556 | struct net_device *phy_dev; | |
557 | int err; | |
e93fbc5a | 558 | u16 mode = IPVLAN_MODE_L3; |
2ad7bf36 MB |
559 | |
560 | if (!tb[IFLA_LINK]) | |
561 | return -EINVAL; | |
562 | ||
563 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
564 | if (!phy_dev) | |
565 | return -ENODEV; | |
566 | ||
5933fea7 | 567 | if (netif_is_ipvlan(phy_dev)) { |
2ad7bf36 MB |
568 | struct ipvl_dev *tmp = netdev_priv(phy_dev); |
569 | ||
570 | phy_dev = tmp->phy_dev; | |
5933fea7 | 571 | } else if (!netif_is_ipvlan_port(phy_dev)) { |
fe18da60 GM |
572 | /* Exit early if the underlying link is invalid or busy */ |
573 | if (phy_dev->type != ARPHRD_ETHER || | |
574 | phy_dev->flags & IFF_LOOPBACK) { | |
575 | netdev_err(phy_dev, | |
576 | "Master is either lo or non-ether device\n"); | |
577 | return -EINVAL; | |
578 | } | |
2ad7bf36 | 579 | |
fe18da60 GM |
580 | if (netdev_is_rx_handler_busy(phy_dev)) { |
581 | netdev_err(phy_dev, "Device is already in use.\n"); | |
582 | return -EBUSY; | |
583 | } | |
584 | } | |
2ad7bf36 MB |
585 | |
586 | ipvlan->phy_dev = phy_dev; | |
587 | ipvlan->dev = dev; | |
2ad7bf36 | 588 | ipvlan->sfeatures = IPVLAN_FEATURES; |
296d4856 | 589 | ipvlan_adjust_mtu(ipvlan, phy_dev); |
2ad7bf36 | 590 | INIT_LIST_HEAD(&ipvlan->addrs); |
2ad7bf36 | 591 | |
fe18da60 GM |
592 | /* TODO Probably put random address here to be presented to the |
593 | * world but keep using the physical-dev address for the outgoing | |
594 | * packets. | |
a190d04d | 595 | */ |
fe18da60 GM |
596 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); |
597 | ||
598 | dev->priv_flags |= IFF_IPVLAN_SLAVE; | |
599 | ||
600 | err = register_netdevice(dev); | |
601 | if (err < 0) | |
602 | return err; | |
603 | ||
604 | /* ipvlan_init() would have created the port, if required */ | |
605 | port = ipvlan_port_get_rtnl(phy_dev); | |
606 | ipvlan->port = port; | |
a190d04d | 607 | |
da36e13c MB |
608 | /* If the port-id base is at the MAX value, then wrap it around and |
609 | * begin from 0x1 again. This may be due to a busy system where lots | |
610 | * of slaves are getting created and deleted. | |
611 | */ | |
612 | if (port->dev_id_start == 0xFFFE) | |
613 | port->dev_id_start = 0x1; | |
614 | ||
009146d1 MB |
615 | /* Since L2 address is shared among all IPvlan slaves including |
616 | * master, use unique 16 bit dev-ids to diffentiate among them. | |
617 | * Assign IDs between 0x1 and 0xFFFE (used by the master) to each | |
618 | * slave link [see addrconf_ifid_eui48()]. | |
619 | */ | |
da36e13c MB |
620 | err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE, |
621 | GFP_KERNEL); | |
019ec003 MB |
622 | if (err < 0) |
623 | err = ida_simple_get(&port->ida, 0x1, port->dev_id_start, | |
624 | GFP_KERNEL); | |
009146d1 | 625 | if (err < 0) |
fe18da60 | 626 | goto unregister_netdev; |
009146d1 | 627 | dev->dev_id = err; |
fe18da60 | 628 | |
da36e13c MB |
629 | /* Increment id-base to the next slot for the future assignment */ |
630 | port->dev_id_start = err + 1; | |
009146d1 | 631 | |
fe18da60 GM |
632 | err = netdev_upper_dev_link(phy_dev, dev, extack); |
633 | if (err) | |
634 | goto remove_ida; | |
2ad7bf36 | 635 | |
fe18da60 GM |
636 | /* Flags are per port and latest update overrides. User has |
637 | * to be consistent in setting it just like the mode attribute. | |
638 | */ | |
639 | if (data && data[IFLA_IPVLAN_FLAGS]) | |
640 | port->flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
2ad7bf36 | 641 | |
fe18da60 GM |
642 | if (data && data[IFLA_IPVLAN_MODE]) |
643 | mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
2ad7bf36 | 644 | |
4fbae7d8 | 645 | err = ipvlan_set_port_mode(port, mode); |
fe18da60 | 646 | if (err) |
1a31cc86 | 647 | goto unlink_netdev; |
2ad7bf36 MB |
648 | |
649 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
650 | netif_stacked_transfer_operstate(phy_dev, dev); | |
651 | return 0; | |
147fd287 | 652 | |
1a31cc86 GF |
653 | unlink_netdev: |
654 | netdev_upper_dev_unlink(phy_dev, dev); | |
009146d1 MB |
655 | remove_ida: |
656 | ida_simple_remove(&port->ida, dev->dev_id); | |
fe18da60 GM |
657 | unregister_netdev: |
658 | unregister_netdevice(dev); | |
147fd287 | 659 | return err; |
2ad7bf36 | 660 | } |
235a9d89 | 661 | EXPORT_SYMBOL_GPL(ipvlan_link_new); |
2ad7bf36 | 662 | |
235a9d89 | 663 | void ipvlan_link_delete(struct net_device *dev, struct list_head *head) |
2ad7bf36 MB |
664 | { |
665 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
666 | struct ipvl_addr *addr, *next; | |
667 | ||
515866f8 | 668 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { |
6640e673 | 669 | ipvlan_ht_addr_del(addr); |
515866f8 | 670 | list_del(&addr->anode); |
6a725497 | 671 | kfree_rcu(addr, rcu); |
2ad7bf36 | 672 | } |
515866f8 | 673 | |
009146d1 | 674 | ida_simple_remove(&ipvlan->port->ida, dev->dev_id); |
2ad7bf36 MB |
675 | list_del_rcu(&ipvlan->pnode); |
676 | unregister_netdevice_queue(dev, head); | |
677 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
678 | } | |
235a9d89 | 679 | EXPORT_SYMBOL_GPL(ipvlan_link_delete); |
2ad7bf36 | 680 | |
235a9d89 | 681 | void ipvlan_link_setup(struct net_device *dev) |
2ad7bf36 MB |
682 | { |
683 | ether_setup(dev); | |
684 | ||
685 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); | |
bf485bcf | 686 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE; |
2ad7bf36 | 687 | dev->netdev_ops = &ipvlan_netdev_ops; |
cf124db5 | 688 | dev->needs_free_netdev = true; |
2ad7bf36 MB |
689 | dev->header_ops = &ipvlan_header_ops; |
690 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
2ad7bf36 | 691 | } |
235a9d89 | 692 | EXPORT_SYMBOL_GPL(ipvlan_link_setup); |
2ad7bf36 MB |
693 | |
694 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
695 | { | |
696 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
a190d04d | 697 | [IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 }, |
2ad7bf36 MB |
698 | }; |
699 | ||
700 | static struct rtnl_link_ops ipvlan_link_ops = { | |
701 | .kind = "ipvlan", | |
702 | .priv_size = sizeof(struct ipvl_dev), | |
703 | ||
2ad7bf36 MB |
704 | .setup = ipvlan_link_setup, |
705 | .newlink = ipvlan_link_new, | |
706 | .dellink = ipvlan_link_delete, | |
707 | }; | |
708 | ||
235a9d89 | 709 | int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 | 710 | { |
235a9d89 SG |
711 | ops->get_size = ipvlan_nl_getsize; |
712 | ops->policy = ipvlan_nl_policy; | |
713 | ops->validate = ipvlan_nl_validate; | |
714 | ops->fill_info = ipvlan_nl_fillinfo; | |
715 | ops->changelink = ipvlan_nl_changelink; | |
716 | ops->maxtype = IFLA_IPVLAN_MAX; | |
2ad7bf36 MB |
717 | return rtnl_link_register(ops); |
718 | } | |
235a9d89 | 719 | EXPORT_SYMBOL_GPL(ipvlan_link_register); |
2ad7bf36 MB |
720 | |
721 | static int ipvlan_device_event(struct notifier_block *unused, | |
722 | unsigned long event, void *ptr) | |
723 | { | |
724 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
725 | struct ipvl_dev *ipvlan, *next; | |
726 | struct ipvl_port *port; | |
727 | LIST_HEAD(lst_kill); | |
728 | ||
5933fea7 | 729 | if (!netif_is_ipvlan_port(dev)) |
2ad7bf36 MB |
730 | return NOTIFY_DONE; |
731 | ||
732 | port = ipvlan_port_get_rtnl(dev); | |
733 | ||
734 | switch (event) { | |
735 | case NETDEV_CHANGE: | |
736 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
737 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
738 | ipvlan->dev); | |
739 | break; | |
740 | ||
3133822f FW |
741 | case NETDEV_REGISTER: { |
742 | struct net *oldnet, *newnet = dev_net(dev); | |
743 | struct ipvlan_netns *old_vnet; | |
744 | ||
745 | oldnet = read_pnet(&port->pnet); | |
746 | if (net_eq(newnet, oldnet)) | |
747 | break; | |
748 | ||
749 | write_pnet(&port->pnet, newnet); | |
750 | ||
751 | old_vnet = net_generic(oldnet, ipvlan_netid); | |
752 | if (!old_vnet->ipvl_nf_hook_refcnt) | |
753 | break; | |
754 | ||
755 | ipvlan_register_nf_hook(newnet); | |
756 | ipvlan_unregister_nf_hook(oldnet); | |
757 | break; | |
758 | } | |
2ad7bf36 MB |
759 | case NETDEV_UNREGISTER: |
760 | if (dev->reg_state != NETREG_UNREGISTERING) | |
761 | break; | |
762 | ||
763 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, | |
764 | pnode) | |
765 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, | |
766 | &lst_kill); | |
767 | unregister_netdevice_many(&lst_kill); | |
768 | break; | |
769 | ||
770 | case NETDEV_FEAT_CHANGE: | |
771 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
772 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
773 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
f6773c5e | 774 | ipvlan->dev->gso_max_segs = dev->gso_max_segs; |
2ad7bf36 MB |
775 | netdev_features_change(ipvlan->dev); |
776 | } | |
777 | break; | |
778 | ||
779 | case NETDEV_CHANGEMTU: | |
780 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
781 | ipvlan_adjust_mtu(ipvlan, dev); | |
782 | break; | |
783 | ||
32c10bbf MB |
784 | case NETDEV_CHANGEADDR: |
785 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
786 | ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr); | |
787 | break; | |
788 | ||
2ad7bf36 MB |
789 | case NETDEV_PRE_TYPE_CHANGE: |
790 | /* Forbid underlying device to change its type. */ | |
791 | return NOTIFY_BAD; | |
792 | } | |
793 | return NOTIFY_DONE; | |
794 | } | |
795 | ||
86673982 | 796 | static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
797 | { |
798 | struct ipvl_addr *addr; | |
799 | ||
2ad7bf36 MB |
800 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); |
801 | if (!addr) | |
802 | return -ENOMEM; | |
803 | ||
804 | addr->master = ipvlan; | |
94333fac | 805 | if (!is_v6) { |
86673982 GF |
806 | memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr)); |
807 | addr->atype = IPVL_IPV4; | |
94333fac MC |
808 | #if IS_ENABLED(CONFIG_IPV6) |
809 | } else { | |
810 | memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr)); | |
811 | addr->atype = IPVL_IPV6; | |
812 | #endif | |
86673982 | 813 | } |
40891e8a | 814 | list_add_tail(&addr->anode, &ipvlan->addrs); |
515866f8 | 815 | |
27705f70 JB |
816 | /* If the interface is not up, the address will be added to the hash |
817 | * list by ipvlan_open. | |
818 | */ | |
819 | if (netif_running(ipvlan->dev)) | |
820 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
821 | |
822 | return 0; | |
823 | } | |
824 | ||
86673982 | 825 | static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
826 | { |
827 | struct ipvl_addr *addr; | |
828 | ||
86673982 | 829 | addr = ipvlan_find_addr(ipvlan, iaddr, is_v6); |
2ad7bf36 MB |
830 | if (!addr) |
831 | return; | |
832 | ||
6640e673 | 833 | ipvlan_ht_addr_del(addr); |
40891e8a | 834 | list_del(&addr->anode); |
2ad7bf36 MB |
835 | kfree_rcu(addr, rcu); |
836 | ||
837 | return; | |
838 | } | |
839 | ||
94333fac MC |
840 | static bool ipvlan_is_valid_dev(const struct net_device *dev) |
841 | { | |
842 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
843 | ||
844 | if (!netif_is_ipvlan(dev)) | |
845 | return false; | |
846 | ||
847 | if (!ipvlan || !ipvlan->port) | |
848 | return false; | |
849 | ||
850 | return true; | |
851 | } | |
852 | ||
853 | #if IS_ENABLED(CONFIG_IPV6) | |
86673982 GF |
854 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) |
855 | { | |
856 | if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) { | |
857 | netif_err(ipvlan, ifup, ipvlan->dev, | |
858 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
859 | ip6_addr, ipvlan->dev->name); | |
860 | return -EINVAL; | |
861 | } | |
862 | ||
863 | return ipvlan_add_addr(ipvlan, ip6_addr, true); | |
864 | } | |
865 | ||
866 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
867 | { | |
868 | return ipvlan_del_addr(ipvlan, ip6_addr, true); | |
869 | } | |
870 | ||
2ad7bf36 MB |
871 | static int ipvlan_addr6_event(struct notifier_block *unused, |
872 | unsigned long event, void *ptr) | |
873 | { | |
874 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
875 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
876 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
877 | ||
5e51fe6f | 878 | if (!ipvlan_is_valid_dev(dev)) |
2ad7bf36 MB |
879 | return NOTIFY_DONE; |
880 | ||
881 | switch (event) { | |
882 | case NETDEV_UP: | |
883 | if (ipvlan_add_addr6(ipvlan, &if6->addr)) | |
884 | return NOTIFY_BAD; | |
885 | break; | |
886 | ||
887 | case NETDEV_DOWN: | |
888 | ipvlan_del_addr6(ipvlan, &if6->addr); | |
889 | break; | |
890 | } | |
891 | ||
892 | return NOTIFY_OK; | |
893 | } | |
894 | ||
3ad7d246 KJ |
895 | static int ipvlan_addr6_validator_event(struct notifier_block *unused, |
896 | unsigned long event, void *ptr) | |
897 | { | |
898 | struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr; | |
899 | struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev; | |
900 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
901 | ||
902 | /* FIXME IPv6 autoconf calls us from bh without RTNL */ | |
903 | if (in_softirq()) | |
904 | return NOTIFY_DONE; | |
905 | ||
5e51fe6f | 906 | if (!ipvlan_is_valid_dev(dev)) |
3ad7d246 KJ |
907 | return NOTIFY_DONE; |
908 | ||
909 | switch (event) { | |
910 | case NETDEV_UP: | |
de95e047 DA |
911 | if (ipvlan_addr_busy(ipvlan->port, &i6vi->i6vi_addr, true)) { |
912 | NL_SET_ERR_MSG(i6vi->extack, | |
913 | "Address already assigned to an ipvlan device"); | |
3ad7d246 | 914 | return notifier_from_errno(-EADDRINUSE); |
de95e047 | 915 | } |
3ad7d246 KJ |
916 | break; |
917 | } | |
918 | ||
919 | return NOTIFY_OK; | |
920 | } | |
94333fac | 921 | #endif |
3ad7d246 | 922 | |
2ad7bf36 MB |
923 | static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) |
924 | { | |
e9997c29 | 925 | if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) { |
2ad7bf36 MB |
926 | netif_err(ipvlan, ifup, ipvlan->dev, |
927 | "Failed to add IPv4=%pI4 on %s intf.\n", | |
928 | ip4_addr, ipvlan->dev->name); | |
929 | return -EINVAL; | |
930 | } | |
2ad7bf36 | 931 | |
86673982 | 932 | return ipvlan_add_addr(ipvlan, ip4_addr, false); |
2ad7bf36 MB |
933 | } |
934 | ||
935 | static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
936 | { | |
86673982 | 937 | return ipvlan_del_addr(ipvlan, ip4_addr, false); |
2ad7bf36 MB |
938 | } |
939 | ||
940 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
941 | unsigned long event, void *ptr) | |
942 | { | |
943 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
944 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
945 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
946 | struct in_addr ip4_addr; | |
947 | ||
5e51fe6f | 948 | if (!ipvlan_is_valid_dev(dev)) |
2ad7bf36 MB |
949 | return NOTIFY_DONE; |
950 | ||
951 | switch (event) { | |
952 | case NETDEV_UP: | |
953 | ip4_addr.s_addr = if4->ifa_address; | |
954 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
955 | return NOTIFY_BAD; | |
956 | break; | |
957 | ||
958 | case NETDEV_DOWN: | |
959 | ip4_addr.s_addr = if4->ifa_address; | |
960 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
961 | break; | |
962 | } | |
963 | ||
964 | return NOTIFY_OK; | |
965 | } | |
966 | ||
3ad7d246 KJ |
967 | static int ipvlan_addr4_validator_event(struct notifier_block *unused, |
968 | unsigned long event, void *ptr) | |
969 | { | |
970 | struct in_validator_info *ivi = (struct in_validator_info *)ptr; | |
971 | struct net_device *dev = (struct net_device *)ivi->ivi_dev->dev; | |
972 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
973 | ||
5e51fe6f | 974 | if (!ipvlan_is_valid_dev(dev)) |
3ad7d246 KJ |
975 | return NOTIFY_DONE; |
976 | ||
977 | switch (event) { | |
978 | case NETDEV_UP: | |
de95e047 DA |
979 | if (ipvlan_addr_busy(ipvlan->port, &ivi->ivi_addr, false)) { |
980 | NL_SET_ERR_MSG(ivi->extack, | |
981 | "Address already assigned to an ipvlan device"); | |
3ad7d246 | 982 | return notifier_from_errno(-EADDRINUSE); |
de95e047 | 983 | } |
3ad7d246 KJ |
984 | break; |
985 | } | |
986 | ||
987 | return NOTIFY_OK; | |
988 | } | |
989 | ||
2ad7bf36 MB |
990 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { |
991 | .notifier_call = ipvlan_addr4_event, | |
992 | }; | |
993 | ||
3ad7d246 KJ |
994 | static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly = { |
995 | .notifier_call = ipvlan_addr4_validator_event, | |
996 | }; | |
997 | ||
2ad7bf36 MB |
998 | static struct notifier_block ipvlan_notifier_block __read_mostly = { |
999 | .notifier_call = ipvlan_device_event, | |
1000 | }; | |
1001 | ||
94333fac | 1002 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 MB |
1003 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { |
1004 | .notifier_call = ipvlan_addr6_event, | |
1005 | }; | |
1006 | ||
3ad7d246 KJ |
1007 | static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = { |
1008 | .notifier_call = ipvlan_addr6_validator_event, | |
1009 | }; | |
94333fac | 1010 | #endif |
3ad7d246 | 1011 | |
3133822f FW |
1012 | static void ipvlan_ns_exit(struct net *net) |
1013 | { | |
1014 | struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid); | |
1015 | ||
1016 | if (WARN_ON_ONCE(vnet->ipvl_nf_hook_refcnt)) { | |
1017 | vnet->ipvl_nf_hook_refcnt = 0; | |
1018 | nf_unregister_net_hooks(net, ipvl_nfops, | |
1019 | ARRAY_SIZE(ipvl_nfops)); | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | static struct pernet_operations ipvlan_net_ops = { | |
1024 | .id = &ipvlan_netid, | |
1025 | .size = sizeof(struct ipvlan_netns), | |
1026 | .exit = ipvlan_ns_exit, | |
68eabe8b | 1027 | .async = true, |
3133822f FW |
1028 | }; |
1029 | ||
2ad7bf36 MB |
1030 | static int __init ipvlan_init_module(void) |
1031 | { | |
1032 | int err; | |
1033 | ||
1034 | ipvlan_init_secret(); | |
1035 | register_netdevice_notifier(&ipvlan_notifier_block); | |
94333fac | 1036 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1037 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1038 | register_inet6addr_validator_notifier( |
1039 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1040 | #endif |
2ad7bf36 | 1041 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); |
3ad7d246 | 1042 | register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block); |
2ad7bf36 | 1043 | |
3133822f | 1044 | err = register_pernet_subsys(&ipvlan_net_ops); |
2ad7bf36 MB |
1045 | if (err < 0) |
1046 | goto error; | |
1047 | ||
3133822f FW |
1048 | err = ipvlan_link_register(&ipvlan_link_ops); |
1049 | if (err < 0) { | |
1050 | unregister_pernet_subsys(&ipvlan_net_ops); | |
1051 | goto error; | |
1052 | } | |
1053 | ||
2ad7bf36 MB |
1054 | return 0; |
1055 | error: | |
1056 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
3ad7d246 KJ |
1057 | unregister_inetaddr_validator_notifier( |
1058 | &ipvlan_addr4_vtor_notifier_block); | |
94333fac | 1059 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1060 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1061 | unregister_inet6addr_validator_notifier( |
1062 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1063 | #endif |
2ad7bf36 MB |
1064 | unregister_netdevice_notifier(&ipvlan_notifier_block); |
1065 | return err; | |
1066 | } | |
1067 | ||
1068 | static void __exit ipvlan_cleanup_module(void) | |
1069 | { | |
1070 | rtnl_link_unregister(&ipvlan_link_ops); | |
3133822f | 1071 | unregister_pernet_subsys(&ipvlan_net_ops); |
2ad7bf36 MB |
1072 | unregister_netdevice_notifier(&ipvlan_notifier_block); |
1073 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
3ad7d246 KJ |
1074 | unregister_inetaddr_validator_notifier( |
1075 | &ipvlan_addr4_vtor_notifier_block); | |
94333fac | 1076 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1077 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1078 | unregister_inet6addr_validator_notifier( |
1079 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1080 | #endif |
2ad7bf36 MB |
1081 | } |
1082 | ||
1083 | module_init(ipvlan_init_module); | |
1084 | module_exit(ipvlan_cleanup_module); | |
1085 | ||
1086 | MODULE_LICENSE("GPL"); | |
1087 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
1088 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
1089 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |