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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 | ||
cf7686a0 PM |
74 | static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval, |
75 | struct netlink_ext_ack *extack) | |
2ad7bf36 MB |
76 | { |
77 | struct ipvl_dev *ipvlan; | |
4fbae7d8 | 78 | struct net_device *mdev = port->dev; |
5dc2d399 HL |
79 | unsigned int flags; |
80 | int err; | |
2ad7bf36 | 81 | |
4fbae7d8 | 82 | ASSERT_RTNL(); |
2ad7bf36 | 83 | if (port->mode != nval) { |
5dc2d399 HL |
84 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
85 | flags = ipvlan->dev->flags; | |
86 | if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S) { | |
87 | err = dev_change_flags(ipvlan->dev, | |
567c5e13 PM |
88 | flags | IFF_NOARP, |
89 | extack); | |
5dc2d399 HL |
90 | } else { |
91 | err = dev_change_flags(ipvlan->dev, | |
567c5e13 PM |
92 | flags & ~IFF_NOARP, |
93 | extack); | |
5dc2d399 HL |
94 | } |
95 | if (unlikely(err)) | |
96 | goto fail; | |
97 | } | |
4fbae7d8 MB |
98 | if (nval == IPVLAN_MODE_L3S) { |
99 | /* New mode is L3S */ | |
3133822f | 100 | err = ipvlan_register_nf_hook(read_pnet(&port->pnet)); |
4fbae7d8 MB |
101 | if (!err) { |
102 | mdev->l3mdev_ops = &ipvl_l3mdev_ops; | |
103 | mdev->priv_flags |= IFF_L3MDEV_MASTER; | |
104 | } else | |
5dc2d399 | 105 | goto fail; |
4fbae7d8 MB |
106 | } else if (port->mode == IPVLAN_MODE_L3S) { |
107 | /* Old mode was L3S */ | |
108 | mdev->priv_flags &= ~IFF_L3MDEV_MASTER; | |
3133822f | 109 | ipvlan_unregister_nf_hook(read_pnet(&port->pnet)); |
4fbae7d8 MB |
110 | mdev->l3mdev_ops = NULL; |
111 | } | |
2ad7bf36 MB |
112 | port->mode = nval; |
113 | } | |
5dc2d399 HL |
114 | return 0; |
115 | ||
116 | fail: | |
117 | /* Undo the flags changes that have been done so far. */ | |
118 | list_for_each_entry_continue_reverse(ipvlan, &port->ipvlans, pnode) { | |
119 | flags = ipvlan->dev->flags; | |
120 | if (port->mode == IPVLAN_MODE_L3 || | |
121 | port->mode == IPVLAN_MODE_L3S) | |
567c5e13 PM |
122 | dev_change_flags(ipvlan->dev, flags | IFF_NOARP, |
123 | NULL); | |
5dc2d399 | 124 | else |
567c5e13 PM |
125 | dev_change_flags(ipvlan->dev, flags & ~IFF_NOARP, |
126 | NULL); | |
5dc2d399 HL |
127 | } |
128 | ||
4fbae7d8 | 129 | return err; |
2ad7bf36 MB |
130 | } |
131 | ||
132 | static int ipvlan_port_create(struct net_device *dev) | |
133 | { | |
134 | struct ipvl_port *port; | |
135 | int err, idx; | |
136 | ||
2ad7bf36 MB |
137 | port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL); |
138 | if (!port) | |
139 | return -ENOMEM; | |
140 | ||
3133822f | 141 | write_pnet(&port->pnet, dev_net(dev)); |
2ad7bf36 MB |
142 | port->dev = dev; |
143 | port->mode = IPVLAN_MODE_L3; | |
144 | INIT_LIST_HEAD(&port->ipvlans); | |
145 | for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++) | |
146 | INIT_HLIST_HEAD(&port->hlhead[idx]); | |
147 | ||
ba35f858 MB |
148 | skb_queue_head_init(&port->backlog); |
149 | INIT_WORK(&port->wq, ipvlan_process_multicast); | |
009146d1 | 150 | ida_init(&port->ida); |
da36e13c | 151 | port->dev_id_start = 1; |
ba35f858 | 152 | |
2ad7bf36 MB |
153 | err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port); |
154 | if (err) | |
155 | goto err; | |
156 | ||
2ad7bf36 MB |
157 | return 0; |
158 | ||
159 | err: | |
48140a21 | 160 | kfree(port); |
2ad7bf36 MB |
161 | return err; |
162 | } | |
163 | ||
164 | static void ipvlan_port_destroy(struct net_device *dev) | |
165 | { | |
166 | struct ipvl_port *port = ipvlan_port_get_rtnl(dev); | |
b1227d01 | 167 | struct sk_buff *skb; |
2ad7bf36 | 168 | |
4fbae7d8 MB |
169 | if (port->mode == IPVLAN_MODE_L3S) { |
170 | dev->priv_flags &= ~IFF_L3MDEV_MASTER; | |
3133822f | 171 | ipvlan_unregister_nf_hook(dev_net(dev)); |
4fbae7d8 MB |
172 | dev->l3mdev_ops = NULL; |
173 | } | |
2ad7bf36 | 174 | netdev_rx_handler_unregister(dev); |
ba35f858 | 175 | cancel_work_sync(&port->wq); |
b1227d01 ED |
176 | while ((skb = __skb_dequeue(&port->backlog)) != NULL) { |
177 | if (skb->dev) | |
178 | dev_put(skb->dev); | |
179 | kfree_skb(skb); | |
180 | } | |
009146d1 | 181 | ida_destroy(&port->ida); |
48140a21 | 182 | kfree(port); |
2ad7bf36 MB |
183 | } |
184 | ||
2ad7bf36 | 185 | #define IPVLAN_FEATURES \ |
a188222b | 186 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
182e0b6b | 187 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_GSO_ROBUST | \ |
2ad7bf36 MB |
188 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
189 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) | |
190 | ||
191 | #define IPVLAN_STATE_MASK \ | |
192 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
193 | ||
2ad7bf36 MB |
194 | static int ipvlan_init(struct net_device *dev) |
195 | { | |
196 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
fe18da60 GM |
197 | struct net_device *phy_dev = ipvlan->phy_dev; |
198 | struct ipvl_port *port; | |
199 | int err; | |
2ad7bf36 MB |
200 | |
201 | dev->state = (dev->state & ~IPVLAN_STATE_MASK) | | |
202 | (phy_dev->state & IPVLAN_STATE_MASK); | |
203 | dev->features = phy_dev->features & IPVLAN_FEATURES; | |
3518e40b | 204 | dev->features |= NETIF_F_LLTX | NETIF_F_VLAN_CHALLENGED; |
2ad7bf36 | 205 | dev->gso_max_size = phy_dev->gso_max_size; |
f6773c5e | 206 | dev->gso_max_segs = phy_dev->gso_max_segs; |
2ad7bf36 MB |
207 | dev->hard_header_len = phy_dev->hard_header_len; |
208 | ||
0d7dd798 | 209 | netdev_lockdep_set_classes(dev); |
2ad7bf36 | 210 | |
87173cd6 | 211 | ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats); |
2ad7bf36 MB |
212 | if (!ipvlan->pcpu_stats) |
213 | return -ENOMEM; | |
214 | ||
fe18da60 GM |
215 | if (!netif_is_ipvlan_port(phy_dev)) { |
216 | err = ipvlan_port_create(phy_dev); | |
217 | if (err < 0) { | |
218 | free_percpu(ipvlan->pcpu_stats); | |
219 | return err; | |
220 | } | |
221 | } | |
222 | port = ipvlan_port_get_rtnl(phy_dev); | |
494e8489 | 223 | port->count += 1; |
2ad7bf36 MB |
224 | return 0; |
225 | } | |
226 | ||
227 | static void ipvlan_uninit(struct net_device *dev) | |
228 | { | |
229 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
fe18da60 GM |
230 | struct net_device *phy_dev = ipvlan->phy_dev; |
231 | struct ipvl_port *port; | |
2ad7bf36 | 232 | |
04901cea | 233 | free_percpu(ipvlan->pcpu_stats); |
2ad7bf36 | 234 | |
fe18da60 | 235 | port = ipvlan_port_get_rtnl(phy_dev); |
2ad7bf36 MB |
236 | port->count -= 1; |
237 | if (!port->count) | |
238 | ipvlan_port_destroy(port->dev); | |
239 | } | |
240 | ||
241 | static int ipvlan_open(struct net_device *dev) | |
242 | { | |
243 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
244 | struct net_device *phy_dev = ipvlan->phy_dev; | |
245 | struct ipvl_addr *addr; | |
246 | ||
4fbae7d8 MB |
247 | if (ipvlan->port->mode == IPVLAN_MODE_L3 || |
248 | ipvlan->port->mode == IPVLAN_MODE_L3S) | |
2ad7bf36 MB |
249 | dev->flags |= IFF_NOARP; |
250 | else | |
251 | dev->flags &= ~IFF_NOARP; | |
252 | ||
82308194 PA |
253 | rcu_read_lock(); |
254 | list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) | |
515866f8 | 255 | ipvlan_ht_addr_add(ipvlan, addr); |
82308194 | 256 | rcu_read_unlock(); |
515866f8 | 257 | |
2ad7bf36 MB |
258 | return dev_uc_add(phy_dev, phy_dev->dev_addr); |
259 | } | |
260 | ||
261 | static int ipvlan_stop(struct net_device *dev) | |
262 | { | |
263 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
264 | struct net_device *phy_dev = ipvlan->phy_dev; | |
265 | struct ipvl_addr *addr; | |
266 | ||
267 | dev_uc_unsync(phy_dev, dev); | |
268 | dev_mc_unsync(phy_dev, dev); | |
269 | ||
270 | dev_uc_del(phy_dev, phy_dev->dev_addr); | |
271 | ||
82308194 PA |
272 | rcu_read_lock(); |
273 | list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) | |
6640e673 | 274 | ipvlan_ht_addr_del(addr); |
82308194 | 275 | rcu_read_unlock(); |
515866f8 | 276 | |
2ad7bf36 MB |
277 | return 0; |
278 | } | |
279 | ||
92c7b0de MB |
280 | static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, |
281 | struct net_device *dev) | |
2ad7bf36 MB |
282 | { |
283 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
284 | int skblen = skb->len; | |
285 | int ret; | |
286 | ||
287 | ret = ipvlan_queue_xmit(skb, dev); | |
288 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
289 | struct ipvl_pcpu_stats *pcptr; | |
290 | ||
291 | pcptr = this_cpu_ptr(ipvlan->pcpu_stats); | |
292 | ||
293 | u64_stats_update_begin(&pcptr->syncp); | |
294 | pcptr->tx_pkts++; | |
295 | pcptr->tx_bytes += skblen; | |
296 | u64_stats_update_end(&pcptr->syncp); | |
297 | } else { | |
298 | this_cpu_inc(ipvlan->pcpu_stats->tx_drps); | |
299 | } | |
300 | return ret; | |
301 | } | |
302 | ||
303 | static netdev_features_t ipvlan_fix_features(struct net_device *dev, | |
304 | netdev_features_t features) | |
305 | { | |
306 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
307 | ||
308 | return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES); | |
309 | } | |
310 | ||
311 | static void ipvlan_change_rx_flags(struct net_device *dev, int change) | |
312 | { | |
313 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
314 | struct net_device *phy_dev = ipvlan->phy_dev; | |
315 | ||
316 | if (change & IFF_ALLMULTI) | |
317 | dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1); | |
318 | } | |
319 | ||
2ad7bf36 MB |
320 | static void ipvlan_set_multicast_mac_filter(struct net_device *dev) |
321 | { | |
322 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
323 | ||
324 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { | |
325 | bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE); | |
326 | } else { | |
327 | struct netdev_hw_addr *ha; | |
328 | DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
329 | ||
330 | bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
331 | netdev_for_each_mc_addr(ha, dev) | |
332 | __set_bit(ipvlan_mac_hash(ha->addr), mc_filters); | |
333 | ||
f631c44b MB |
334 | /* Turn-on broadcast bit irrespective of address family, |
335 | * since broadcast is deferred to a work-queue, hence no | |
336 | * impact on fast-path processing. | |
337 | */ | |
338 | __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters); | |
339 | ||
2ad7bf36 MB |
340 | bitmap_copy(ipvlan->mac_filters, mc_filters, |
341 | IPVLAN_MAC_FILTER_SIZE); | |
342 | } | |
343 | dev_uc_sync(ipvlan->phy_dev, dev); | |
344 | dev_mc_sync(ipvlan->phy_dev, dev); | |
345 | } | |
346 | ||
bc1f4470 | 347 | static void ipvlan_get_stats64(struct net_device *dev, |
348 | struct rtnl_link_stats64 *s) | |
2ad7bf36 MB |
349 | { |
350 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
351 | ||
352 | if (ipvlan->pcpu_stats) { | |
353 | struct ipvl_pcpu_stats *pcptr; | |
354 | u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes; | |
355 | u32 rx_errs = 0, tx_drps = 0; | |
356 | u32 strt; | |
357 | int idx; | |
358 | ||
359 | for_each_possible_cpu(idx) { | |
360 | pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx); | |
361 | do { | |
362 | strt= u64_stats_fetch_begin_irq(&pcptr->syncp); | |
363 | rx_pkts = pcptr->rx_pkts; | |
364 | rx_bytes = pcptr->rx_bytes; | |
365 | rx_mcast = pcptr->rx_mcast; | |
366 | tx_pkts = pcptr->tx_pkts; | |
367 | tx_bytes = pcptr->tx_bytes; | |
368 | } while (u64_stats_fetch_retry_irq(&pcptr->syncp, | |
369 | strt)); | |
370 | ||
371 | s->rx_packets += rx_pkts; | |
372 | s->rx_bytes += rx_bytes; | |
373 | s->multicast += rx_mcast; | |
374 | s->tx_packets += tx_pkts; | |
375 | s->tx_bytes += tx_bytes; | |
376 | ||
377 | /* u32 values are updated without syncp protection. */ | |
378 | rx_errs += pcptr->rx_errs; | |
379 | tx_drps += pcptr->tx_drps; | |
380 | } | |
381 | s->rx_errors = rx_errs; | |
382 | s->rx_dropped = rx_errs; | |
383 | s->tx_dropped = tx_drps; | |
384 | } | |
2ad7bf36 MB |
385 | } |
386 | ||
387 | static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) | |
388 | { | |
389 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
390 | struct net_device *phy_dev = ipvlan->phy_dev; | |
391 | ||
392 | return vlan_vid_add(phy_dev, proto, vid); | |
393 | } | |
394 | ||
395 | static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, | |
396 | u16 vid) | |
397 | { | |
398 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
399 | struct net_device *phy_dev = ipvlan->phy_dev; | |
400 | ||
401 | vlan_vid_del(phy_dev, proto, vid); | |
402 | return 0; | |
403 | } | |
404 | ||
7c411658 ND |
405 | static int ipvlan_get_iflink(const struct net_device *dev) |
406 | { | |
407 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
408 | ||
409 | return ipvlan->phy_dev->ifindex; | |
410 | } | |
411 | ||
2ad7bf36 MB |
412 | static const struct net_device_ops ipvlan_netdev_ops = { |
413 | .ndo_init = ipvlan_init, | |
414 | .ndo_uninit = ipvlan_uninit, | |
415 | .ndo_open = ipvlan_open, | |
416 | .ndo_stop = ipvlan_stop, | |
417 | .ndo_start_xmit = ipvlan_start_xmit, | |
418 | .ndo_fix_features = ipvlan_fix_features, | |
419 | .ndo_change_rx_flags = ipvlan_change_rx_flags, | |
420 | .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter, | |
421 | .ndo_get_stats64 = ipvlan_get_stats64, | |
422 | .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid, | |
423 | .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid, | |
7c411658 | 424 | .ndo_get_iflink = ipvlan_get_iflink, |
2ad7bf36 MB |
425 | }; |
426 | ||
427 | static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
428 | unsigned short type, const void *daddr, | |
429 | const void *saddr, unsigned len) | |
430 | { | |
431 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
432 | struct net_device *phy_dev = ipvlan->phy_dev; | |
433 | ||
434 | /* TODO Probably use a different field than dev_addr so that the | |
435 | * mac-address on the virtual device is portable and can be carried | |
436 | * while the packets use the mac-addr on the physical device. | |
437 | */ | |
438 | return dev_hard_header(skb, phy_dev, type, daddr, | |
32c10bbf | 439 | saddr ? : phy_dev->dev_addr, len); |
2ad7bf36 MB |
440 | } |
441 | ||
442 | static const struct header_ops ipvlan_header_ops = { | |
443 | .create = ipvlan_hard_header, | |
2ad7bf36 MB |
444 | .parse = eth_header_parse, |
445 | .cache = eth_header_cache, | |
446 | .cache_update = eth_header_cache_update, | |
447 | }; | |
448 | ||
1ec54cb4 PA |
449 | static bool netif_is_ipvlan(const struct net_device *dev) |
450 | { | |
451 | /* both ipvlan and ipvtap devices use the same netdev_ops */ | |
452 | return dev->netdev_ops == &ipvlan_netdev_ops; | |
453 | } | |
454 | ||
314d10d7 DD |
455 | static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev, |
456 | struct ethtool_link_ksettings *cmd) | |
2ad7bf36 MB |
457 | { |
458 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
459 | ||
314d10d7 | 460 | return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd); |
2ad7bf36 MB |
461 | } |
462 | ||
463 | static void ipvlan_ethtool_get_drvinfo(struct net_device *dev, | |
464 | struct ethtool_drvinfo *drvinfo) | |
465 | { | |
466 | strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver)); | |
467 | strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version)); | |
468 | } | |
469 | ||
470 | static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev) | |
471 | { | |
472 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
473 | ||
474 | return ipvlan->msg_enable; | |
475 | } | |
476 | ||
477 | static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value) | |
478 | { | |
479 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
480 | ||
481 | ipvlan->msg_enable = value; | |
482 | } | |
483 | ||
484 | static const struct ethtool_ops ipvlan_ethtool_ops = { | |
485 | .get_link = ethtool_op_get_link, | |
314d10d7 | 486 | .get_link_ksettings = ipvlan_ethtool_get_link_ksettings, |
2ad7bf36 MB |
487 | .get_drvinfo = ipvlan_ethtool_get_drvinfo, |
488 | .get_msglevel = ipvlan_ethtool_get_msglevel, | |
489 | .set_msglevel = ipvlan_ethtool_set_msglevel, | |
490 | }; | |
491 | ||
492 | static int ipvlan_nl_changelink(struct net_device *dev, | |
ad744b22 MS |
493 | struct nlattr *tb[], struct nlattr *data[], |
494 | struct netlink_ext_ack *extack) | |
2ad7bf36 MB |
495 | { |
496 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
497 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
4fbae7d8 | 498 | int err = 0; |
2ad7bf36 | 499 | |
a190d04d MB |
500 | if (!data) |
501 | return 0; | |
502 | ||
503 | if (data[IFLA_IPVLAN_MODE]) { | |
2ad7bf36 MB |
504 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
505 | ||
cf7686a0 | 506 | err = ipvlan_set_port_mode(port, nmode, extack); |
2ad7bf36 | 507 | } |
a190d04d MB |
508 | |
509 | if (!err && data[IFLA_IPVLAN_FLAGS]) { | |
510 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
511 | ||
512 | if (flags & IPVLAN_F_PRIVATE) | |
513 | ipvlan_mark_private(port); | |
514 | else | |
515 | ipvlan_clear_private(port); | |
fe89aa6b MB |
516 | |
517 | if (flags & IPVLAN_F_VEPA) | |
518 | ipvlan_mark_vepa(port); | |
519 | else | |
520 | ipvlan_clear_vepa(port); | |
a190d04d MB |
521 | } |
522 | ||
4fbae7d8 | 523 | return err; |
2ad7bf36 MB |
524 | } |
525 | ||
526 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
527 | { | |
528 | return (0 | |
529 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
a190d04d | 530 | + nla_total_size(2) /* IFLA_IPVLAN_FLAGS */ |
2ad7bf36 MB |
531 | ); |
532 | } | |
533 | ||
a8b8a889 MS |
534 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[], |
535 | struct netlink_ext_ack *extack) | |
2ad7bf36 | 536 | { |
a190d04d MB |
537 | if (!data) |
538 | return 0; | |
539 | ||
540 | if (data[IFLA_IPVLAN_MODE]) { | |
2ad7bf36 MB |
541 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
542 | ||
b1dd054d | 543 | if (mode >= IPVLAN_MODE_MAX) |
2ad7bf36 MB |
544 | return -EINVAL; |
545 | } | |
a190d04d MB |
546 | if (data[IFLA_IPVLAN_FLAGS]) { |
547 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
548 | ||
fe89aa6b MB |
549 | /* Only two bits are used at this moment. */ |
550 | if (flags & ~(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
551 | return -EINVAL; | |
552 | /* Also both flags can't be active at the same time. */ | |
553 | if ((flags & (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) == | |
554 | (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
a190d04d MB |
555 | return -EINVAL; |
556 | } | |
557 | ||
2ad7bf36 MB |
558 | return 0; |
559 | } | |
560 | ||
561 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
562 | const struct net_device *dev) | |
563 | { | |
564 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
565 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
566 | int ret = -EINVAL; | |
567 | ||
568 | if (!port) | |
569 | goto err; | |
570 | ||
571 | ret = -EMSGSIZE; | |
572 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
573 | goto err; | |
a190d04d MB |
574 | if (nla_put_u16(skb, IFLA_IPVLAN_FLAGS, port->flags)) |
575 | goto err; | |
2ad7bf36 MB |
576 | |
577 | return 0; | |
578 | ||
579 | err: | |
580 | return ret; | |
581 | } | |
582 | ||
235a9d89 | 583 | int ipvlan_link_new(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
584 | struct nlattr *tb[], struct nlattr *data[], |
585 | struct netlink_ext_ack *extack) | |
2ad7bf36 MB |
586 | { |
587 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
588 | struct ipvl_port *port; | |
589 | struct net_device *phy_dev; | |
590 | int err; | |
e93fbc5a | 591 | u16 mode = IPVLAN_MODE_L3; |
2ad7bf36 MB |
592 | |
593 | if (!tb[IFLA_LINK]) | |
594 | return -EINVAL; | |
595 | ||
596 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
597 | if (!phy_dev) | |
598 | return -ENODEV; | |
599 | ||
5933fea7 | 600 | if (netif_is_ipvlan(phy_dev)) { |
2ad7bf36 MB |
601 | struct ipvl_dev *tmp = netdev_priv(phy_dev); |
602 | ||
603 | phy_dev = tmp->phy_dev; | |
5933fea7 | 604 | } else if (!netif_is_ipvlan_port(phy_dev)) { |
fe18da60 GM |
605 | /* Exit early if the underlying link is invalid or busy */ |
606 | if (phy_dev->type != ARPHRD_ETHER || | |
607 | phy_dev->flags & IFF_LOOPBACK) { | |
608 | netdev_err(phy_dev, | |
609 | "Master is either lo or non-ether device\n"); | |
610 | return -EINVAL; | |
611 | } | |
2ad7bf36 | 612 | |
fe18da60 GM |
613 | if (netdev_is_rx_handler_busy(phy_dev)) { |
614 | netdev_err(phy_dev, "Device is already in use.\n"); | |
615 | return -EBUSY; | |
616 | } | |
617 | } | |
2ad7bf36 MB |
618 | |
619 | ipvlan->phy_dev = phy_dev; | |
620 | ipvlan->dev = dev; | |
2ad7bf36 | 621 | ipvlan->sfeatures = IPVLAN_FEATURES; |
30877961 XL |
622 | if (!tb[IFLA_MTU]) |
623 | ipvlan_adjust_mtu(ipvlan, phy_dev); | |
2ad7bf36 | 624 | INIT_LIST_HEAD(&ipvlan->addrs); |
82308194 | 625 | spin_lock_init(&ipvlan->addrs_lock); |
2ad7bf36 | 626 | |
fe18da60 GM |
627 | /* TODO Probably put random address here to be presented to the |
628 | * world but keep using the physical-dev address for the outgoing | |
629 | * packets. | |
a190d04d | 630 | */ |
fe18da60 GM |
631 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); |
632 | ||
f5426250 PA |
633 | dev->priv_flags |= IFF_NO_RX_HANDLER; |
634 | ||
fe18da60 GM |
635 | err = register_netdevice(dev); |
636 | if (err < 0) | |
637 | return err; | |
638 | ||
639 | /* ipvlan_init() would have created the port, if required */ | |
640 | port = ipvlan_port_get_rtnl(phy_dev); | |
641 | ipvlan->port = port; | |
a190d04d | 642 | |
da36e13c MB |
643 | /* If the port-id base is at the MAX value, then wrap it around and |
644 | * begin from 0x1 again. This may be due to a busy system where lots | |
645 | * of slaves are getting created and deleted. | |
646 | */ | |
647 | if (port->dev_id_start == 0xFFFE) | |
648 | port->dev_id_start = 0x1; | |
649 | ||
009146d1 MB |
650 | /* Since L2 address is shared among all IPvlan slaves including |
651 | * master, use unique 16 bit dev-ids to diffentiate among them. | |
652 | * Assign IDs between 0x1 and 0xFFFE (used by the master) to each | |
653 | * slave link [see addrconf_ifid_eui48()]. | |
654 | */ | |
da36e13c MB |
655 | err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE, |
656 | GFP_KERNEL); | |
019ec003 MB |
657 | if (err < 0) |
658 | err = ida_simple_get(&port->ida, 0x1, port->dev_id_start, | |
659 | GFP_KERNEL); | |
009146d1 | 660 | if (err < 0) |
fe18da60 | 661 | goto unregister_netdev; |
009146d1 | 662 | dev->dev_id = err; |
fe18da60 | 663 | |
da36e13c MB |
664 | /* Increment id-base to the next slot for the future assignment */ |
665 | port->dev_id_start = err + 1; | |
009146d1 | 666 | |
fe18da60 GM |
667 | err = netdev_upper_dev_link(phy_dev, dev, extack); |
668 | if (err) | |
669 | goto remove_ida; | |
2ad7bf36 | 670 | |
fe18da60 GM |
671 | /* Flags are per port and latest update overrides. User has |
672 | * to be consistent in setting it just like the mode attribute. | |
673 | */ | |
674 | if (data && data[IFLA_IPVLAN_FLAGS]) | |
675 | port->flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
2ad7bf36 | 676 | |
fe18da60 GM |
677 | if (data && data[IFLA_IPVLAN_MODE]) |
678 | mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
2ad7bf36 | 679 | |
cf7686a0 | 680 | err = ipvlan_set_port_mode(port, mode, extack); |
fe18da60 | 681 | if (err) |
1a31cc86 | 682 | goto unlink_netdev; |
2ad7bf36 MB |
683 | |
684 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
685 | netif_stacked_transfer_operstate(phy_dev, dev); | |
686 | return 0; | |
147fd287 | 687 | |
1a31cc86 GF |
688 | unlink_netdev: |
689 | netdev_upper_dev_unlink(phy_dev, dev); | |
009146d1 MB |
690 | remove_ida: |
691 | ida_simple_remove(&port->ida, dev->dev_id); | |
fe18da60 GM |
692 | unregister_netdev: |
693 | unregister_netdevice(dev); | |
147fd287 | 694 | return err; |
2ad7bf36 | 695 | } |
235a9d89 | 696 | EXPORT_SYMBOL_GPL(ipvlan_link_new); |
2ad7bf36 | 697 | |
235a9d89 | 698 | void ipvlan_link_delete(struct net_device *dev, struct list_head *head) |
2ad7bf36 MB |
699 | { |
700 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
701 | struct ipvl_addr *addr, *next; | |
702 | ||
82308194 | 703 | spin_lock_bh(&ipvlan->addrs_lock); |
515866f8 | 704 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { |
6640e673 | 705 | ipvlan_ht_addr_del(addr); |
82308194 | 706 | list_del_rcu(&addr->anode); |
6a725497 | 707 | kfree_rcu(addr, rcu); |
2ad7bf36 | 708 | } |
82308194 | 709 | spin_unlock_bh(&ipvlan->addrs_lock); |
515866f8 | 710 | |
009146d1 | 711 | ida_simple_remove(&ipvlan->port->ida, dev->dev_id); |
2ad7bf36 MB |
712 | list_del_rcu(&ipvlan->pnode); |
713 | unregister_netdevice_queue(dev, head); | |
714 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
715 | } | |
235a9d89 | 716 | EXPORT_SYMBOL_GPL(ipvlan_link_delete); |
2ad7bf36 | 717 | |
235a9d89 | 718 | void ipvlan_link_setup(struct net_device *dev) |
2ad7bf36 MB |
719 | { |
720 | ether_setup(dev); | |
721 | ||
548feb33 | 722 | dev->max_mtu = ETH_MAX_MTU; |
2ad7bf36 | 723 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
bf485bcf | 724 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE; |
2ad7bf36 | 725 | dev->netdev_ops = &ipvlan_netdev_ops; |
cf124db5 | 726 | dev->needs_free_netdev = true; |
2ad7bf36 MB |
727 | dev->header_ops = &ipvlan_header_ops; |
728 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
2ad7bf36 | 729 | } |
235a9d89 | 730 | EXPORT_SYMBOL_GPL(ipvlan_link_setup); |
2ad7bf36 MB |
731 | |
732 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
733 | { | |
734 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
a190d04d | 735 | [IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 }, |
2ad7bf36 MB |
736 | }; |
737 | ||
738 | static struct rtnl_link_ops ipvlan_link_ops = { | |
739 | .kind = "ipvlan", | |
740 | .priv_size = sizeof(struct ipvl_dev), | |
741 | ||
2ad7bf36 MB |
742 | .setup = ipvlan_link_setup, |
743 | .newlink = ipvlan_link_new, | |
744 | .dellink = ipvlan_link_delete, | |
745 | }; | |
746 | ||
235a9d89 | 747 | int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 | 748 | { |
235a9d89 SG |
749 | ops->get_size = ipvlan_nl_getsize; |
750 | ops->policy = ipvlan_nl_policy; | |
751 | ops->validate = ipvlan_nl_validate; | |
752 | ops->fill_info = ipvlan_nl_fillinfo; | |
753 | ops->changelink = ipvlan_nl_changelink; | |
754 | ops->maxtype = IFLA_IPVLAN_MAX; | |
2ad7bf36 MB |
755 | return rtnl_link_register(ops); |
756 | } | |
235a9d89 | 757 | EXPORT_SYMBOL_GPL(ipvlan_link_register); |
2ad7bf36 MB |
758 | |
759 | static int ipvlan_device_event(struct notifier_block *unused, | |
760 | unsigned long event, void *ptr) | |
761 | { | |
762 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
763 | struct ipvl_dev *ipvlan, *next; | |
764 | struct ipvl_port *port; | |
765 | LIST_HEAD(lst_kill); | |
766 | ||
5933fea7 | 767 | if (!netif_is_ipvlan_port(dev)) |
2ad7bf36 MB |
768 | return NOTIFY_DONE; |
769 | ||
770 | port = ipvlan_port_get_rtnl(dev); | |
771 | ||
772 | switch (event) { | |
773 | case NETDEV_CHANGE: | |
774 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
775 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
776 | ipvlan->dev); | |
777 | break; | |
778 | ||
3133822f FW |
779 | case NETDEV_REGISTER: { |
780 | struct net *oldnet, *newnet = dev_net(dev); | |
781 | struct ipvlan_netns *old_vnet; | |
782 | ||
783 | oldnet = read_pnet(&port->pnet); | |
784 | if (net_eq(newnet, oldnet)) | |
785 | break; | |
786 | ||
787 | write_pnet(&port->pnet, newnet); | |
788 | ||
789 | old_vnet = net_generic(oldnet, ipvlan_netid); | |
790 | if (!old_vnet->ipvl_nf_hook_refcnt) | |
791 | break; | |
792 | ||
793 | ipvlan_register_nf_hook(newnet); | |
794 | ipvlan_unregister_nf_hook(oldnet); | |
795 | break; | |
796 | } | |
2ad7bf36 MB |
797 | case NETDEV_UNREGISTER: |
798 | if (dev->reg_state != NETREG_UNREGISTERING) | |
799 | break; | |
800 | ||
82308194 | 801 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, pnode) |
2ad7bf36 MB |
802 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, |
803 | &lst_kill); | |
804 | unregister_netdevice_many(&lst_kill); | |
805 | break; | |
806 | ||
807 | case NETDEV_FEAT_CHANGE: | |
808 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
809 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
810 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
f6773c5e | 811 | ipvlan->dev->gso_max_segs = dev->gso_max_segs; |
2ad7bf36 MB |
812 | netdev_features_change(ipvlan->dev); |
813 | } | |
814 | break; | |
815 | ||
816 | case NETDEV_CHANGEMTU: | |
817 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
818 | ipvlan_adjust_mtu(ipvlan, dev); | |
819 | break; | |
820 | ||
32c10bbf | 821 | case NETDEV_CHANGEADDR: |
ab452c3c | 822 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
32c10bbf | 823 | ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr); |
ab452c3c KL |
824 | call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev); |
825 | } | |
32c10bbf MB |
826 | break; |
827 | ||
2ad7bf36 MB |
828 | case NETDEV_PRE_TYPE_CHANGE: |
829 | /* Forbid underlying device to change its type. */ | |
830 | return NOTIFY_BAD; | |
831 | } | |
832 | return NOTIFY_DONE; | |
833 | } | |
834 | ||
82308194 | 835 | /* the caller must held the addrs lock */ |
86673982 | 836 | static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
837 | { |
838 | struct ipvl_addr *addr; | |
839 | ||
2ad7bf36 MB |
840 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); |
841 | if (!addr) | |
842 | return -ENOMEM; | |
843 | ||
844 | addr->master = ipvlan; | |
94333fac | 845 | if (!is_v6) { |
86673982 GF |
846 | memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr)); |
847 | addr->atype = IPVL_IPV4; | |
94333fac MC |
848 | #if IS_ENABLED(CONFIG_IPV6) |
849 | } else { | |
850 | memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr)); | |
851 | addr->atype = IPVL_IPV6; | |
852 | #endif | |
86673982 | 853 | } |
82308194 PA |
854 | |
855 | list_add_tail_rcu(&addr->anode, &ipvlan->addrs); | |
515866f8 | 856 | |
27705f70 JB |
857 | /* If the interface is not up, the address will be added to the hash |
858 | * list by ipvlan_open. | |
859 | */ | |
860 | if (netif_running(ipvlan->dev)) | |
861 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
862 | |
863 | return 0; | |
864 | } | |
865 | ||
86673982 | 866 | static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
867 | { |
868 | struct ipvl_addr *addr; | |
869 | ||
82308194 | 870 | spin_lock_bh(&ipvlan->addrs_lock); |
86673982 | 871 | addr = ipvlan_find_addr(ipvlan, iaddr, is_v6); |
82308194 PA |
872 | if (!addr) { |
873 | spin_unlock_bh(&ipvlan->addrs_lock); | |
2ad7bf36 | 874 | return; |
82308194 | 875 | } |
2ad7bf36 | 876 | |
6640e673 | 877 | ipvlan_ht_addr_del(addr); |
82308194 PA |
878 | list_del_rcu(&addr->anode); |
879 | spin_unlock_bh(&ipvlan->addrs_lock); | |
2ad7bf36 | 880 | kfree_rcu(addr, rcu); |
2ad7bf36 MB |
881 | } |
882 | ||
94333fac MC |
883 | static bool ipvlan_is_valid_dev(const struct net_device *dev) |
884 | { | |
885 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
886 | ||
887 | if (!netif_is_ipvlan(dev)) | |
888 | return false; | |
889 | ||
890 | if (!ipvlan || !ipvlan->port) | |
891 | return false; | |
892 | ||
893 | return true; | |
894 | } | |
895 | ||
896 | #if IS_ENABLED(CONFIG_IPV6) | |
86673982 GF |
897 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) |
898 | { | |
82308194 PA |
899 | int ret = -EINVAL; |
900 | ||
901 | spin_lock_bh(&ipvlan->addrs_lock); | |
902 | if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) | |
86673982 GF |
903 | netif_err(ipvlan, ifup, ipvlan->dev, |
904 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
905 | ip6_addr, ipvlan->dev->name); | |
82308194 PA |
906 | else |
907 | ret = ipvlan_add_addr(ipvlan, ip6_addr, true); | |
908 | spin_unlock_bh(&ipvlan->addrs_lock); | |
909 | return ret; | |
86673982 GF |
910 | } |
911 | ||
912 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
913 | { | |
914 | return ipvlan_del_addr(ipvlan, ip6_addr, true); | |
915 | } | |
916 | ||
2ad7bf36 MB |
917 | static int ipvlan_addr6_event(struct notifier_block *unused, |
918 | unsigned long event, void *ptr) | |
919 | { | |
920 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
921 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
922 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
923 | ||
5e51fe6f | 924 | if (!ipvlan_is_valid_dev(dev)) |
2ad7bf36 MB |
925 | return NOTIFY_DONE; |
926 | ||
927 | switch (event) { | |
928 | case NETDEV_UP: | |
929 | if (ipvlan_add_addr6(ipvlan, &if6->addr)) | |
930 | return NOTIFY_BAD; | |
931 | break; | |
932 | ||
933 | case NETDEV_DOWN: | |
934 | ipvlan_del_addr6(ipvlan, &if6->addr); | |
935 | break; | |
936 | } | |
937 | ||
938 | return NOTIFY_OK; | |
939 | } | |
940 | ||
3ad7d246 KJ |
941 | static int ipvlan_addr6_validator_event(struct notifier_block *unused, |
942 | unsigned long event, void *ptr) | |
943 | { | |
944 | struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr; | |
945 | struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev; | |
946 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
947 | ||
5e51fe6f | 948 | if (!ipvlan_is_valid_dev(dev)) |
3ad7d246 KJ |
949 | return NOTIFY_DONE; |
950 | ||
951 | switch (event) { | |
952 | case NETDEV_UP: | |
de95e047 DA |
953 | if (ipvlan_addr_busy(ipvlan->port, &i6vi->i6vi_addr, true)) { |
954 | NL_SET_ERR_MSG(i6vi->extack, | |
955 | "Address already assigned to an ipvlan device"); | |
3ad7d246 | 956 | return notifier_from_errno(-EADDRINUSE); |
de95e047 | 957 | } |
3ad7d246 KJ |
958 | break; |
959 | } | |
960 | ||
961 | return NOTIFY_OK; | |
962 | } | |
94333fac | 963 | #endif |
3ad7d246 | 964 | |
2ad7bf36 MB |
965 | static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) |
966 | { | |
82308194 PA |
967 | int ret = -EINVAL; |
968 | ||
969 | spin_lock_bh(&ipvlan->addrs_lock); | |
970 | if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) | |
2ad7bf36 MB |
971 | netif_err(ipvlan, ifup, ipvlan->dev, |
972 | "Failed to add IPv4=%pI4 on %s intf.\n", | |
973 | ip4_addr, ipvlan->dev->name); | |
82308194 PA |
974 | else |
975 | ret = ipvlan_add_addr(ipvlan, ip4_addr, false); | |
976 | spin_unlock_bh(&ipvlan->addrs_lock); | |
977 | return ret; | |
2ad7bf36 MB |
978 | } |
979 | ||
980 | static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
981 | { | |
86673982 | 982 | return ipvlan_del_addr(ipvlan, ip4_addr, false); |
2ad7bf36 MB |
983 | } |
984 | ||
985 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
986 | unsigned long event, void *ptr) | |
987 | { | |
988 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
989 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
990 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
991 | struct in_addr ip4_addr; | |
992 | ||
5e51fe6f | 993 | if (!ipvlan_is_valid_dev(dev)) |
2ad7bf36 MB |
994 | return NOTIFY_DONE; |
995 | ||
996 | switch (event) { | |
997 | case NETDEV_UP: | |
998 | ip4_addr.s_addr = if4->ifa_address; | |
999 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
1000 | return NOTIFY_BAD; | |
1001 | break; | |
1002 | ||
1003 | case NETDEV_DOWN: | |
1004 | ip4_addr.s_addr = if4->ifa_address; | |
1005 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
1006 | break; | |
1007 | } | |
1008 | ||
1009 | return NOTIFY_OK; | |
1010 | } | |
1011 | ||
3ad7d246 KJ |
1012 | static int ipvlan_addr4_validator_event(struct notifier_block *unused, |
1013 | unsigned long event, void *ptr) | |
1014 | { | |
1015 | struct in_validator_info *ivi = (struct in_validator_info *)ptr; | |
1016 | struct net_device *dev = (struct net_device *)ivi->ivi_dev->dev; | |
1017 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
1018 | ||
5e51fe6f | 1019 | if (!ipvlan_is_valid_dev(dev)) |
3ad7d246 KJ |
1020 | return NOTIFY_DONE; |
1021 | ||
1022 | switch (event) { | |
1023 | case NETDEV_UP: | |
de95e047 DA |
1024 | if (ipvlan_addr_busy(ipvlan->port, &ivi->ivi_addr, false)) { |
1025 | NL_SET_ERR_MSG(ivi->extack, | |
1026 | "Address already assigned to an ipvlan device"); | |
3ad7d246 | 1027 | return notifier_from_errno(-EADDRINUSE); |
de95e047 | 1028 | } |
3ad7d246 KJ |
1029 | break; |
1030 | } | |
1031 | ||
1032 | return NOTIFY_OK; | |
1033 | } | |
1034 | ||
2ad7bf36 MB |
1035 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { |
1036 | .notifier_call = ipvlan_addr4_event, | |
1037 | }; | |
1038 | ||
3ad7d246 KJ |
1039 | static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly = { |
1040 | .notifier_call = ipvlan_addr4_validator_event, | |
1041 | }; | |
1042 | ||
2ad7bf36 MB |
1043 | static struct notifier_block ipvlan_notifier_block __read_mostly = { |
1044 | .notifier_call = ipvlan_device_event, | |
1045 | }; | |
1046 | ||
94333fac | 1047 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 MB |
1048 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { |
1049 | .notifier_call = ipvlan_addr6_event, | |
1050 | }; | |
1051 | ||
3ad7d246 KJ |
1052 | static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = { |
1053 | .notifier_call = ipvlan_addr6_validator_event, | |
1054 | }; | |
94333fac | 1055 | #endif |
3ad7d246 | 1056 | |
3133822f FW |
1057 | static void ipvlan_ns_exit(struct net *net) |
1058 | { | |
1059 | struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid); | |
1060 | ||
1061 | if (WARN_ON_ONCE(vnet->ipvl_nf_hook_refcnt)) { | |
1062 | vnet->ipvl_nf_hook_refcnt = 0; | |
1063 | nf_unregister_net_hooks(net, ipvl_nfops, | |
1064 | ARRAY_SIZE(ipvl_nfops)); | |
1065 | } | |
1066 | } | |
1067 | ||
1068 | static struct pernet_operations ipvlan_net_ops = { | |
1069 | .id = &ipvlan_netid, | |
1070 | .size = sizeof(struct ipvlan_netns), | |
1071 | .exit = ipvlan_ns_exit, | |
1072 | }; | |
1073 | ||
2ad7bf36 MB |
1074 | static int __init ipvlan_init_module(void) |
1075 | { | |
1076 | int err; | |
1077 | ||
1078 | ipvlan_init_secret(); | |
1079 | register_netdevice_notifier(&ipvlan_notifier_block); | |
94333fac | 1080 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1081 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1082 | register_inet6addr_validator_notifier( |
1083 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1084 | #endif |
2ad7bf36 | 1085 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); |
3ad7d246 | 1086 | register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block); |
2ad7bf36 | 1087 | |
3133822f | 1088 | err = register_pernet_subsys(&ipvlan_net_ops); |
2ad7bf36 MB |
1089 | if (err < 0) |
1090 | goto error; | |
1091 | ||
3133822f FW |
1092 | err = ipvlan_link_register(&ipvlan_link_ops); |
1093 | if (err < 0) { | |
1094 | unregister_pernet_subsys(&ipvlan_net_ops); | |
1095 | goto error; | |
1096 | } | |
1097 | ||
2ad7bf36 MB |
1098 | return 0; |
1099 | error: | |
1100 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
3ad7d246 KJ |
1101 | unregister_inetaddr_validator_notifier( |
1102 | &ipvlan_addr4_vtor_notifier_block); | |
94333fac | 1103 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1104 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1105 | unregister_inet6addr_validator_notifier( |
1106 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1107 | #endif |
2ad7bf36 MB |
1108 | unregister_netdevice_notifier(&ipvlan_notifier_block); |
1109 | return err; | |
1110 | } | |
1111 | ||
1112 | static void __exit ipvlan_cleanup_module(void) | |
1113 | { | |
1114 | rtnl_link_unregister(&ipvlan_link_ops); | |
3133822f | 1115 | unregister_pernet_subsys(&ipvlan_net_ops); |
2ad7bf36 MB |
1116 | unregister_netdevice_notifier(&ipvlan_notifier_block); |
1117 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
3ad7d246 KJ |
1118 | unregister_inetaddr_validator_notifier( |
1119 | &ipvlan_addr4_vtor_notifier_block); | |
94333fac | 1120 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1121 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1122 | unregister_inet6addr_validator_notifier( |
1123 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1124 | #endif |
2ad7bf36 MB |
1125 | } |
1126 | ||
1127 | module_init(ipvlan_init_module); | |
1128 | module_exit(ipvlan_cleanup_module); | |
1129 | ||
1130 | MODULE_LICENSE("GPL"); | |
1131 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
1132 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
1133 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |