Commit | Line | Data |
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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; | |
d5256083 | 103 | mdev->priv_flags |= IFF_L3MDEV_RX_HANDLER; |
4fbae7d8 | 104 | } else |
5dc2d399 | 105 | goto fail; |
4fbae7d8 MB |
106 | } else if (port->mode == IPVLAN_MODE_L3S) { |
107 | /* Old mode was L3S */ | |
d5256083 | 108 | mdev->priv_flags &= ~IFF_L3MDEV_RX_HANDLER; |
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 | 169 | if (port->mode == IPVLAN_MODE_L3S) { |
d5256083 | 170 | dev->priv_flags &= ~IFF_L3MDEV_RX_HANDLER; |
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; | |
7cc9f700 DB |
502 | if (!ns_capable(dev_net(ipvlan->phy_dev)->user_ns, CAP_NET_ADMIN)) |
503 | return -EPERM; | |
a190d04d MB |
504 | |
505 | if (data[IFLA_IPVLAN_MODE]) { | |
2ad7bf36 MB |
506 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
507 | ||
cf7686a0 | 508 | err = ipvlan_set_port_mode(port, nmode, extack); |
2ad7bf36 | 509 | } |
a190d04d MB |
510 | |
511 | if (!err && data[IFLA_IPVLAN_FLAGS]) { | |
512 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
513 | ||
514 | if (flags & IPVLAN_F_PRIVATE) | |
515 | ipvlan_mark_private(port); | |
516 | else | |
517 | ipvlan_clear_private(port); | |
fe89aa6b MB |
518 | |
519 | if (flags & IPVLAN_F_VEPA) | |
520 | ipvlan_mark_vepa(port); | |
521 | else | |
522 | ipvlan_clear_vepa(port); | |
a190d04d MB |
523 | } |
524 | ||
4fbae7d8 | 525 | return err; |
2ad7bf36 MB |
526 | } |
527 | ||
528 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
529 | { | |
530 | return (0 | |
531 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
a190d04d | 532 | + nla_total_size(2) /* IFLA_IPVLAN_FLAGS */ |
2ad7bf36 MB |
533 | ); |
534 | } | |
535 | ||
a8b8a889 MS |
536 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[], |
537 | struct netlink_ext_ack *extack) | |
2ad7bf36 | 538 | { |
a190d04d MB |
539 | if (!data) |
540 | return 0; | |
541 | ||
542 | if (data[IFLA_IPVLAN_MODE]) { | |
2ad7bf36 MB |
543 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
544 | ||
b1dd054d | 545 | if (mode >= IPVLAN_MODE_MAX) |
2ad7bf36 MB |
546 | return -EINVAL; |
547 | } | |
a190d04d MB |
548 | if (data[IFLA_IPVLAN_FLAGS]) { |
549 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
550 | ||
fe89aa6b MB |
551 | /* Only two bits are used at this moment. */ |
552 | if (flags & ~(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
553 | return -EINVAL; | |
554 | /* Also both flags can't be active at the same time. */ | |
555 | if ((flags & (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) == | |
556 | (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
a190d04d MB |
557 | return -EINVAL; |
558 | } | |
559 | ||
2ad7bf36 MB |
560 | return 0; |
561 | } | |
562 | ||
563 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
564 | const struct net_device *dev) | |
565 | { | |
566 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
567 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
568 | int ret = -EINVAL; | |
569 | ||
570 | if (!port) | |
571 | goto err; | |
572 | ||
573 | ret = -EMSGSIZE; | |
574 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
575 | goto err; | |
a190d04d MB |
576 | if (nla_put_u16(skb, IFLA_IPVLAN_FLAGS, port->flags)) |
577 | goto err; | |
2ad7bf36 MB |
578 | |
579 | return 0; | |
580 | ||
581 | err: | |
582 | return ret; | |
583 | } | |
584 | ||
235a9d89 | 585 | int ipvlan_link_new(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
586 | struct nlattr *tb[], struct nlattr *data[], |
587 | struct netlink_ext_ack *extack) | |
2ad7bf36 MB |
588 | { |
589 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
590 | struct ipvl_port *port; | |
591 | struct net_device *phy_dev; | |
592 | int err; | |
e93fbc5a | 593 | u16 mode = IPVLAN_MODE_L3; |
2ad7bf36 MB |
594 | |
595 | if (!tb[IFLA_LINK]) | |
596 | return -EINVAL; | |
597 | ||
598 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
599 | if (!phy_dev) | |
600 | return -ENODEV; | |
601 | ||
5933fea7 | 602 | if (netif_is_ipvlan(phy_dev)) { |
2ad7bf36 MB |
603 | struct ipvl_dev *tmp = netdev_priv(phy_dev); |
604 | ||
605 | phy_dev = tmp->phy_dev; | |
7cc9f700 DB |
606 | if (!ns_capable(dev_net(phy_dev)->user_ns, CAP_NET_ADMIN)) |
607 | return -EPERM; | |
5933fea7 | 608 | } else if (!netif_is_ipvlan_port(phy_dev)) { |
fe18da60 GM |
609 | /* Exit early if the underlying link is invalid or busy */ |
610 | if (phy_dev->type != ARPHRD_ETHER || | |
611 | phy_dev->flags & IFF_LOOPBACK) { | |
612 | netdev_err(phy_dev, | |
613 | "Master is either lo or non-ether device\n"); | |
614 | return -EINVAL; | |
615 | } | |
2ad7bf36 | 616 | |
fe18da60 GM |
617 | if (netdev_is_rx_handler_busy(phy_dev)) { |
618 | netdev_err(phy_dev, "Device is already in use.\n"); | |
619 | return -EBUSY; | |
620 | } | |
621 | } | |
2ad7bf36 MB |
622 | |
623 | ipvlan->phy_dev = phy_dev; | |
624 | ipvlan->dev = dev; | |
2ad7bf36 | 625 | ipvlan->sfeatures = IPVLAN_FEATURES; |
30877961 XL |
626 | if (!tb[IFLA_MTU]) |
627 | ipvlan_adjust_mtu(ipvlan, phy_dev); | |
2ad7bf36 | 628 | INIT_LIST_HEAD(&ipvlan->addrs); |
82308194 | 629 | spin_lock_init(&ipvlan->addrs_lock); |
2ad7bf36 | 630 | |
fe18da60 GM |
631 | /* TODO Probably put random address here to be presented to the |
632 | * world but keep using the physical-dev address for the outgoing | |
633 | * packets. | |
a190d04d | 634 | */ |
fe18da60 GM |
635 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); |
636 | ||
f5426250 PA |
637 | dev->priv_flags |= IFF_NO_RX_HANDLER; |
638 | ||
fe18da60 GM |
639 | err = register_netdevice(dev); |
640 | if (err < 0) | |
641 | return err; | |
642 | ||
643 | /* ipvlan_init() would have created the port, if required */ | |
644 | port = ipvlan_port_get_rtnl(phy_dev); | |
645 | ipvlan->port = port; | |
a190d04d | 646 | |
da36e13c MB |
647 | /* If the port-id base is at the MAX value, then wrap it around and |
648 | * begin from 0x1 again. This may be due to a busy system where lots | |
649 | * of slaves are getting created and deleted. | |
650 | */ | |
651 | if (port->dev_id_start == 0xFFFE) | |
652 | port->dev_id_start = 0x1; | |
653 | ||
009146d1 MB |
654 | /* Since L2 address is shared among all IPvlan slaves including |
655 | * master, use unique 16 bit dev-ids to diffentiate among them. | |
656 | * Assign IDs between 0x1 and 0xFFFE (used by the master) to each | |
657 | * slave link [see addrconf_ifid_eui48()]. | |
658 | */ | |
da36e13c MB |
659 | err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE, |
660 | GFP_KERNEL); | |
019ec003 MB |
661 | if (err < 0) |
662 | err = ida_simple_get(&port->ida, 0x1, port->dev_id_start, | |
663 | GFP_KERNEL); | |
009146d1 | 664 | if (err < 0) |
fe18da60 | 665 | goto unregister_netdev; |
009146d1 | 666 | dev->dev_id = err; |
fe18da60 | 667 | |
da36e13c MB |
668 | /* Increment id-base to the next slot for the future assignment */ |
669 | port->dev_id_start = err + 1; | |
009146d1 | 670 | |
fe18da60 GM |
671 | err = netdev_upper_dev_link(phy_dev, dev, extack); |
672 | if (err) | |
673 | goto remove_ida; | |
2ad7bf36 | 674 | |
fe18da60 GM |
675 | /* Flags are per port and latest update overrides. User has |
676 | * to be consistent in setting it just like the mode attribute. | |
677 | */ | |
678 | if (data && data[IFLA_IPVLAN_FLAGS]) | |
679 | port->flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
2ad7bf36 | 680 | |
fe18da60 GM |
681 | if (data && data[IFLA_IPVLAN_MODE]) |
682 | mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
2ad7bf36 | 683 | |
cf7686a0 | 684 | err = ipvlan_set_port_mode(port, mode, extack); |
fe18da60 | 685 | if (err) |
1a31cc86 | 686 | goto unlink_netdev; |
2ad7bf36 MB |
687 | |
688 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
689 | netif_stacked_transfer_operstate(phy_dev, dev); | |
690 | return 0; | |
147fd287 | 691 | |
1a31cc86 GF |
692 | unlink_netdev: |
693 | netdev_upper_dev_unlink(phy_dev, dev); | |
009146d1 MB |
694 | remove_ida: |
695 | ida_simple_remove(&port->ida, dev->dev_id); | |
fe18da60 GM |
696 | unregister_netdev: |
697 | unregister_netdevice(dev); | |
147fd287 | 698 | return err; |
2ad7bf36 | 699 | } |
235a9d89 | 700 | EXPORT_SYMBOL_GPL(ipvlan_link_new); |
2ad7bf36 | 701 | |
235a9d89 | 702 | void ipvlan_link_delete(struct net_device *dev, struct list_head *head) |
2ad7bf36 MB |
703 | { |
704 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
705 | struct ipvl_addr *addr, *next; | |
706 | ||
82308194 | 707 | spin_lock_bh(&ipvlan->addrs_lock); |
515866f8 | 708 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { |
6640e673 | 709 | ipvlan_ht_addr_del(addr); |
82308194 | 710 | list_del_rcu(&addr->anode); |
6a725497 | 711 | kfree_rcu(addr, rcu); |
2ad7bf36 | 712 | } |
82308194 | 713 | spin_unlock_bh(&ipvlan->addrs_lock); |
515866f8 | 714 | |
009146d1 | 715 | ida_simple_remove(&ipvlan->port->ida, dev->dev_id); |
2ad7bf36 MB |
716 | list_del_rcu(&ipvlan->pnode); |
717 | unregister_netdevice_queue(dev, head); | |
718 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
719 | } | |
235a9d89 | 720 | EXPORT_SYMBOL_GPL(ipvlan_link_delete); |
2ad7bf36 | 721 | |
235a9d89 | 722 | void ipvlan_link_setup(struct net_device *dev) |
2ad7bf36 MB |
723 | { |
724 | ether_setup(dev); | |
725 | ||
548feb33 | 726 | dev->max_mtu = ETH_MAX_MTU; |
2ad7bf36 | 727 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
bf485bcf | 728 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE; |
2ad7bf36 | 729 | dev->netdev_ops = &ipvlan_netdev_ops; |
cf124db5 | 730 | dev->needs_free_netdev = true; |
2ad7bf36 MB |
731 | dev->header_ops = &ipvlan_header_ops; |
732 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
2ad7bf36 | 733 | } |
235a9d89 | 734 | EXPORT_SYMBOL_GPL(ipvlan_link_setup); |
2ad7bf36 MB |
735 | |
736 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
737 | { | |
738 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
a190d04d | 739 | [IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 }, |
2ad7bf36 MB |
740 | }; |
741 | ||
742 | static struct rtnl_link_ops ipvlan_link_ops = { | |
743 | .kind = "ipvlan", | |
744 | .priv_size = sizeof(struct ipvl_dev), | |
745 | ||
2ad7bf36 MB |
746 | .setup = ipvlan_link_setup, |
747 | .newlink = ipvlan_link_new, | |
748 | .dellink = ipvlan_link_delete, | |
749 | }; | |
750 | ||
235a9d89 | 751 | int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 | 752 | { |
235a9d89 SG |
753 | ops->get_size = ipvlan_nl_getsize; |
754 | ops->policy = ipvlan_nl_policy; | |
755 | ops->validate = ipvlan_nl_validate; | |
756 | ops->fill_info = ipvlan_nl_fillinfo; | |
757 | ops->changelink = ipvlan_nl_changelink; | |
758 | ops->maxtype = IFLA_IPVLAN_MAX; | |
2ad7bf36 MB |
759 | return rtnl_link_register(ops); |
760 | } | |
235a9d89 | 761 | EXPORT_SYMBOL_GPL(ipvlan_link_register); |
2ad7bf36 MB |
762 | |
763 | static int ipvlan_device_event(struct notifier_block *unused, | |
764 | unsigned long event, void *ptr) | |
765 | { | |
61345fab PM |
766 | struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); |
767 | struct netdev_notifier_pre_changeaddr_info *prechaddr_info; | |
2ad7bf36 MB |
768 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
769 | struct ipvl_dev *ipvlan, *next; | |
770 | struct ipvl_port *port; | |
771 | LIST_HEAD(lst_kill); | |
61345fab | 772 | int err; |
2ad7bf36 | 773 | |
5933fea7 | 774 | if (!netif_is_ipvlan_port(dev)) |
2ad7bf36 MB |
775 | return NOTIFY_DONE; |
776 | ||
777 | port = ipvlan_port_get_rtnl(dev); | |
778 | ||
779 | switch (event) { | |
780 | case NETDEV_CHANGE: | |
781 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
782 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
783 | ipvlan->dev); | |
784 | break; | |
785 | ||
3133822f FW |
786 | case NETDEV_REGISTER: { |
787 | struct net *oldnet, *newnet = dev_net(dev); | |
788 | struct ipvlan_netns *old_vnet; | |
789 | ||
790 | oldnet = read_pnet(&port->pnet); | |
791 | if (net_eq(newnet, oldnet)) | |
792 | break; | |
793 | ||
794 | write_pnet(&port->pnet, newnet); | |
795 | ||
796 | old_vnet = net_generic(oldnet, ipvlan_netid); | |
797 | if (!old_vnet->ipvl_nf_hook_refcnt) | |
798 | break; | |
799 | ||
800 | ipvlan_register_nf_hook(newnet); | |
801 | ipvlan_unregister_nf_hook(oldnet); | |
802 | break; | |
803 | } | |
2ad7bf36 MB |
804 | case NETDEV_UNREGISTER: |
805 | if (dev->reg_state != NETREG_UNREGISTERING) | |
806 | break; | |
807 | ||
82308194 | 808 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, pnode) |
2ad7bf36 MB |
809 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, |
810 | &lst_kill); | |
811 | unregister_netdevice_many(&lst_kill); | |
812 | break; | |
813 | ||
814 | case NETDEV_FEAT_CHANGE: | |
815 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
816 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
817 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
f6773c5e | 818 | ipvlan->dev->gso_max_segs = dev->gso_max_segs; |
2ad7bf36 MB |
819 | netdev_features_change(ipvlan->dev); |
820 | } | |
821 | break; | |
822 | ||
823 | case NETDEV_CHANGEMTU: | |
824 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
825 | ipvlan_adjust_mtu(ipvlan, dev); | |
826 | break; | |
827 | ||
61345fab PM |
828 | case NETDEV_PRE_CHANGEADDR: |
829 | prechaddr_info = ptr; | |
830 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
831 | err = dev_pre_changeaddr_notify(ipvlan->dev, | |
832 | prechaddr_info->dev_addr, | |
833 | extack); | |
834 | if (err) | |
835 | return notifier_from_errno(err); | |
836 | } | |
837 | break; | |
838 | ||
32c10bbf | 839 | case NETDEV_CHANGEADDR: |
ab452c3c | 840 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
32c10bbf | 841 | ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr); |
ab452c3c KL |
842 | call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev); |
843 | } | |
32c10bbf MB |
844 | break; |
845 | ||
2ad7bf36 MB |
846 | case NETDEV_PRE_TYPE_CHANGE: |
847 | /* Forbid underlying device to change its type. */ | |
848 | return NOTIFY_BAD; | |
849 | } | |
850 | return NOTIFY_DONE; | |
851 | } | |
852 | ||
82308194 | 853 | /* the caller must held the addrs lock */ |
86673982 | 854 | static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
855 | { |
856 | struct ipvl_addr *addr; | |
857 | ||
2ad7bf36 MB |
858 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); |
859 | if (!addr) | |
860 | return -ENOMEM; | |
861 | ||
862 | addr->master = ipvlan; | |
94333fac | 863 | if (!is_v6) { |
86673982 GF |
864 | memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr)); |
865 | addr->atype = IPVL_IPV4; | |
94333fac MC |
866 | #if IS_ENABLED(CONFIG_IPV6) |
867 | } else { | |
868 | memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr)); | |
869 | addr->atype = IPVL_IPV6; | |
870 | #endif | |
86673982 | 871 | } |
82308194 PA |
872 | |
873 | list_add_tail_rcu(&addr->anode, &ipvlan->addrs); | |
515866f8 | 874 | |
27705f70 JB |
875 | /* If the interface is not up, the address will be added to the hash |
876 | * list by ipvlan_open. | |
877 | */ | |
878 | if (netif_running(ipvlan->dev)) | |
879 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
880 | |
881 | return 0; | |
882 | } | |
883 | ||
86673982 | 884 | static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
885 | { |
886 | struct ipvl_addr *addr; | |
887 | ||
82308194 | 888 | spin_lock_bh(&ipvlan->addrs_lock); |
86673982 | 889 | addr = ipvlan_find_addr(ipvlan, iaddr, is_v6); |
82308194 PA |
890 | if (!addr) { |
891 | spin_unlock_bh(&ipvlan->addrs_lock); | |
2ad7bf36 | 892 | return; |
82308194 | 893 | } |
2ad7bf36 | 894 | |
6640e673 | 895 | ipvlan_ht_addr_del(addr); |
82308194 PA |
896 | list_del_rcu(&addr->anode); |
897 | spin_unlock_bh(&ipvlan->addrs_lock); | |
2ad7bf36 | 898 | kfree_rcu(addr, rcu); |
2ad7bf36 MB |
899 | } |
900 | ||
94333fac MC |
901 | static bool ipvlan_is_valid_dev(const struct net_device *dev) |
902 | { | |
903 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
904 | ||
905 | if (!netif_is_ipvlan(dev)) | |
906 | return false; | |
907 | ||
908 | if (!ipvlan || !ipvlan->port) | |
909 | return false; | |
910 | ||
911 | return true; | |
912 | } | |
913 | ||
914 | #if IS_ENABLED(CONFIG_IPV6) | |
86673982 GF |
915 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) |
916 | { | |
82308194 PA |
917 | int ret = -EINVAL; |
918 | ||
919 | spin_lock_bh(&ipvlan->addrs_lock); | |
920 | if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) | |
86673982 GF |
921 | netif_err(ipvlan, ifup, ipvlan->dev, |
922 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
923 | ip6_addr, ipvlan->dev->name); | |
82308194 PA |
924 | else |
925 | ret = ipvlan_add_addr(ipvlan, ip6_addr, true); | |
926 | spin_unlock_bh(&ipvlan->addrs_lock); | |
927 | return ret; | |
86673982 GF |
928 | } |
929 | ||
930 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
931 | { | |
932 | return ipvlan_del_addr(ipvlan, ip6_addr, true); | |
933 | } | |
934 | ||
2ad7bf36 MB |
935 | static int ipvlan_addr6_event(struct notifier_block *unused, |
936 | unsigned long event, void *ptr) | |
937 | { | |
938 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
939 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
940 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
941 | ||
5e51fe6f | 942 | if (!ipvlan_is_valid_dev(dev)) |
2ad7bf36 MB |
943 | return NOTIFY_DONE; |
944 | ||
945 | switch (event) { | |
946 | case NETDEV_UP: | |
947 | if (ipvlan_add_addr6(ipvlan, &if6->addr)) | |
948 | return NOTIFY_BAD; | |
949 | break; | |
950 | ||
951 | case NETDEV_DOWN: | |
952 | ipvlan_del_addr6(ipvlan, &if6->addr); | |
953 | break; | |
954 | } | |
955 | ||
956 | return NOTIFY_OK; | |
957 | } | |
958 | ||
3ad7d246 KJ |
959 | static int ipvlan_addr6_validator_event(struct notifier_block *unused, |
960 | unsigned long event, void *ptr) | |
961 | { | |
962 | struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr; | |
963 | struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev; | |
964 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
965 | ||
5e51fe6f | 966 | if (!ipvlan_is_valid_dev(dev)) |
3ad7d246 KJ |
967 | return NOTIFY_DONE; |
968 | ||
969 | switch (event) { | |
970 | case NETDEV_UP: | |
de95e047 DA |
971 | if (ipvlan_addr_busy(ipvlan->port, &i6vi->i6vi_addr, true)) { |
972 | NL_SET_ERR_MSG(i6vi->extack, | |
973 | "Address already assigned to an ipvlan device"); | |
3ad7d246 | 974 | return notifier_from_errno(-EADDRINUSE); |
de95e047 | 975 | } |
3ad7d246 KJ |
976 | break; |
977 | } | |
978 | ||
979 | return NOTIFY_OK; | |
980 | } | |
94333fac | 981 | #endif |
3ad7d246 | 982 | |
2ad7bf36 MB |
983 | static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) |
984 | { | |
82308194 PA |
985 | int ret = -EINVAL; |
986 | ||
987 | spin_lock_bh(&ipvlan->addrs_lock); | |
988 | if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) | |
2ad7bf36 MB |
989 | netif_err(ipvlan, ifup, ipvlan->dev, |
990 | "Failed to add IPv4=%pI4 on %s intf.\n", | |
991 | ip4_addr, ipvlan->dev->name); | |
82308194 PA |
992 | else |
993 | ret = ipvlan_add_addr(ipvlan, ip4_addr, false); | |
994 | spin_unlock_bh(&ipvlan->addrs_lock); | |
995 | return ret; | |
2ad7bf36 MB |
996 | } |
997 | ||
998 | static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
999 | { | |
86673982 | 1000 | return ipvlan_del_addr(ipvlan, ip4_addr, false); |
2ad7bf36 MB |
1001 | } |
1002 | ||
1003 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
1004 | unsigned long event, void *ptr) | |
1005 | { | |
1006 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
1007 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
1008 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
1009 | struct in_addr ip4_addr; | |
1010 | ||
5e51fe6f | 1011 | if (!ipvlan_is_valid_dev(dev)) |
2ad7bf36 MB |
1012 | return NOTIFY_DONE; |
1013 | ||
1014 | switch (event) { | |
1015 | case NETDEV_UP: | |
1016 | ip4_addr.s_addr = if4->ifa_address; | |
1017 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
1018 | return NOTIFY_BAD; | |
1019 | break; | |
1020 | ||
1021 | case NETDEV_DOWN: | |
1022 | ip4_addr.s_addr = if4->ifa_address; | |
1023 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
1024 | break; | |
1025 | } | |
1026 | ||
1027 | return NOTIFY_OK; | |
1028 | } | |
1029 | ||
3ad7d246 KJ |
1030 | static int ipvlan_addr4_validator_event(struct notifier_block *unused, |
1031 | unsigned long event, void *ptr) | |
1032 | { | |
1033 | struct in_validator_info *ivi = (struct in_validator_info *)ptr; | |
1034 | struct net_device *dev = (struct net_device *)ivi->ivi_dev->dev; | |
1035 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
1036 | ||
5e51fe6f | 1037 | if (!ipvlan_is_valid_dev(dev)) |
3ad7d246 KJ |
1038 | return NOTIFY_DONE; |
1039 | ||
1040 | switch (event) { | |
1041 | case NETDEV_UP: | |
de95e047 DA |
1042 | if (ipvlan_addr_busy(ipvlan->port, &ivi->ivi_addr, false)) { |
1043 | NL_SET_ERR_MSG(ivi->extack, | |
1044 | "Address already assigned to an ipvlan device"); | |
3ad7d246 | 1045 | return notifier_from_errno(-EADDRINUSE); |
de95e047 | 1046 | } |
3ad7d246 KJ |
1047 | break; |
1048 | } | |
1049 | ||
1050 | return NOTIFY_OK; | |
1051 | } | |
1052 | ||
2ad7bf36 MB |
1053 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { |
1054 | .notifier_call = ipvlan_addr4_event, | |
1055 | }; | |
1056 | ||
3ad7d246 KJ |
1057 | static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly = { |
1058 | .notifier_call = ipvlan_addr4_validator_event, | |
1059 | }; | |
1060 | ||
2ad7bf36 MB |
1061 | static struct notifier_block ipvlan_notifier_block __read_mostly = { |
1062 | .notifier_call = ipvlan_device_event, | |
1063 | }; | |
1064 | ||
94333fac | 1065 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 MB |
1066 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { |
1067 | .notifier_call = ipvlan_addr6_event, | |
1068 | }; | |
1069 | ||
3ad7d246 KJ |
1070 | static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = { |
1071 | .notifier_call = ipvlan_addr6_validator_event, | |
1072 | }; | |
94333fac | 1073 | #endif |
3ad7d246 | 1074 | |
3133822f FW |
1075 | static void ipvlan_ns_exit(struct net *net) |
1076 | { | |
1077 | struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid); | |
1078 | ||
1079 | if (WARN_ON_ONCE(vnet->ipvl_nf_hook_refcnt)) { | |
1080 | vnet->ipvl_nf_hook_refcnt = 0; | |
1081 | nf_unregister_net_hooks(net, ipvl_nfops, | |
1082 | ARRAY_SIZE(ipvl_nfops)); | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | static struct pernet_operations ipvlan_net_ops = { | |
1087 | .id = &ipvlan_netid, | |
1088 | .size = sizeof(struct ipvlan_netns), | |
1089 | .exit = ipvlan_ns_exit, | |
1090 | }; | |
1091 | ||
2ad7bf36 MB |
1092 | static int __init ipvlan_init_module(void) |
1093 | { | |
1094 | int err; | |
1095 | ||
1096 | ipvlan_init_secret(); | |
1097 | register_netdevice_notifier(&ipvlan_notifier_block); | |
94333fac | 1098 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1099 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1100 | register_inet6addr_validator_notifier( |
1101 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1102 | #endif |
2ad7bf36 | 1103 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); |
3ad7d246 | 1104 | register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block); |
2ad7bf36 | 1105 | |
3133822f | 1106 | err = register_pernet_subsys(&ipvlan_net_ops); |
2ad7bf36 MB |
1107 | if (err < 0) |
1108 | goto error; | |
1109 | ||
3133822f FW |
1110 | err = ipvlan_link_register(&ipvlan_link_ops); |
1111 | if (err < 0) { | |
1112 | unregister_pernet_subsys(&ipvlan_net_ops); | |
1113 | goto error; | |
1114 | } | |
1115 | ||
2ad7bf36 MB |
1116 | return 0; |
1117 | error: | |
1118 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
3ad7d246 KJ |
1119 | unregister_inetaddr_validator_notifier( |
1120 | &ipvlan_addr4_vtor_notifier_block); | |
94333fac | 1121 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1122 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1123 | unregister_inet6addr_validator_notifier( |
1124 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1125 | #endif |
2ad7bf36 MB |
1126 | unregister_netdevice_notifier(&ipvlan_notifier_block); |
1127 | return err; | |
1128 | } | |
1129 | ||
1130 | static void __exit ipvlan_cleanup_module(void) | |
1131 | { | |
1132 | rtnl_link_unregister(&ipvlan_link_ops); | |
3133822f | 1133 | unregister_pernet_subsys(&ipvlan_net_ops); |
2ad7bf36 MB |
1134 | unregister_netdevice_notifier(&ipvlan_notifier_block); |
1135 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
3ad7d246 KJ |
1136 | unregister_inetaddr_validator_notifier( |
1137 | &ipvlan_addr4_vtor_notifier_block); | |
94333fac | 1138 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1139 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1140 | unregister_inet6addr_validator_notifier( |
1141 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1142 | #endif |
2ad7bf36 MB |
1143 | } |
1144 | ||
1145 | module_init(ipvlan_init_module); | |
1146 | module_exit(ipvlan_cleanup_module); | |
1147 | ||
1148 | MODULE_LICENSE("GPL"); | |
1149 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
1150 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
1151 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |