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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2ad7bf36 | 2 | /* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com> |
2ad7bf36 MB |
3 | */ |
4 | ||
5 | #include "ipvlan.h" | |
6 | ||
cf7686a0 PM |
7 | static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval, |
8 | struct netlink_ext_ack *extack) | |
2ad7bf36 MB |
9 | { |
10 | struct ipvl_dev *ipvlan; | |
5dc2d399 HL |
11 | unsigned int flags; |
12 | int err; | |
2ad7bf36 | 13 | |
4fbae7d8 | 14 | ASSERT_RTNL(); |
2ad7bf36 | 15 | if (port->mode != nval) { |
5dc2d399 HL |
16 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
17 | flags = ipvlan->dev->flags; | |
18 | if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S) { | |
19 | err = dev_change_flags(ipvlan->dev, | |
567c5e13 PM |
20 | flags | IFF_NOARP, |
21 | extack); | |
5dc2d399 HL |
22 | } else { |
23 | err = dev_change_flags(ipvlan->dev, | |
567c5e13 PM |
24 | flags & ~IFF_NOARP, |
25 | extack); | |
5dc2d399 HL |
26 | } |
27 | if (unlikely(err)) | |
28 | goto fail; | |
29 | } | |
4fbae7d8 MB |
30 | if (nval == IPVLAN_MODE_L3S) { |
31 | /* New mode is L3S */ | |
c675e06a DB |
32 | err = ipvlan_l3s_register(port); |
33 | if (err) | |
5dc2d399 | 34 | goto fail; |
4fbae7d8 MB |
35 | } else if (port->mode == IPVLAN_MODE_L3S) { |
36 | /* Old mode was L3S */ | |
c675e06a | 37 | ipvlan_l3s_unregister(port); |
4fbae7d8 | 38 | } |
2ad7bf36 MB |
39 | port->mode = nval; |
40 | } | |
5dc2d399 HL |
41 | return 0; |
42 | ||
43 | fail: | |
44 | /* Undo the flags changes that have been done so far. */ | |
45 | list_for_each_entry_continue_reverse(ipvlan, &port->ipvlans, pnode) { | |
46 | flags = ipvlan->dev->flags; | |
47 | if (port->mode == IPVLAN_MODE_L3 || | |
48 | port->mode == IPVLAN_MODE_L3S) | |
567c5e13 PM |
49 | dev_change_flags(ipvlan->dev, flags | IFF_NOARP, |
50 | NULL); | |
5dc2d399 | 51 | else |
567c5e13 PM |
52 | dev_change_flags(ipvlan->dev, flags & ~IFF_NOARP, |
53 | NULL); | |
5dc2d399 HL |
54 | } |
55 | ||
4fbae7d8 | 56 | return err; |
2ad7bf36 MB |
57 | } |
58 | ||
59 | static int ipvlan_port_create(struct net_device *dev) | |
60 | { | |
61 | struct ipvl_port *port; | |
62 | int err, idx; | |
63 | ||
2ad7bf36 MB |
64 | port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL); |
65 | if (!port) | |
66 | return -ENOMEM; | |
67 | ||
3133822f | 68 | write_pnet(&port->pnet, dev_net(dev)); |
2ad7bf36 MB |
69 | port->dev = dev; |
70 | port->mode = IPVLAN_MODE_L3; | |
71 | INIT_LIST_HEAD(&port->ipvlans); | |
72 | for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++) | |
73 | INIT_HLIST_HEAD(&port->hlhead[idx]); | |
74 | ||
ba35f858 MB |
75 | skb_queue_head_init(&port->backlog); |
76 | INIT_WORK(&port->wq, ipvlan_process_multicast); | |
009146d1 | 77 | ida_init(&port->ida); |
da36e13c | 78 | port->dev_id_start = 1; |
ba35f858 | 79 | |
2ad7bf36 MB |
80 | err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port); |
81 | if (err) | |
82 | goto err; | |
83 | ||
2ad7bf36 MB |
84 | return 0; |
85 | ||
86 | err: | |
48140a21 | 87 | kfree(port); |
2ad7bf36 MB |
88 | return err; |
89 | } | |
90 | ||
91 | static void ipvlan_port_destroy(struct net_device *dev) | |
92 | { | |
93 | struct ipvl_port *port = ipvlan_port_get_rtnl(dev); | |
b1227d01 | 94 | struct sk_buff *skb; |
2ad7bf36 | 95 | |
c675e06a DB |
96 | if (port->mode == IPVLAN_MODE_L3S) |
97 | ipvlan_l3s_unregister(port); | |
2ad7bf36 | 98 | netdev_rx_handler_unregister(dev); |
ba35f858 | 99 | cancel_work_sync(&port->wq); |
b1227d01 ED |
100 | while ((skb = __skb_dequeue(&port->backlog)) != NULL) { |
101 | if (skb->dev) | |
102 | dev_put(skb->dev); | |
103 | kfree_skb(skb); | |
104 | } | |
009146d1 | 105 | ida_destroy(&port->ida); |
48140a21 | 106 | kfree(port); |
2ad7bf36 MB |
107 | } |
108 | ||
2ad7bf36 | 109 | #define IPVLAN_FEATURES \ |
ceae266b | 110 | (NETIF_F_SG | NETIF_F_CSUM_MASK | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
41441d85 MB |
111 | NETIF_F_GSO | NETIF_F_ALL_TSO | NETIF_F_GSO_ROBUST | \ |
112 | NETIF_F_GRO | NETIF_F_RXCSUM | \ | |
2ad7bf36 MB |
113 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
114 | ||
115 | #define IPVLAN_STATE_MASK \ | |
116 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
117 | ||
2ad7bf36 MB |
118 | static int ipvlan_init(struct net_device *dev) |
119 | { | |
120 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
fe18da60 GM |
121 | struct net_device *phy_dev = ipvlan->phy_dev; |
122 | struct ipvl_port *port; | |
123 | int err; | |
2ad7bf36 MB |
124 | |
125 | dev->state = (dev->state & ~IPVLAN_STATE_MASK) | | |
126 | (phy_dev->state & IPVLAN_STATE_MASK); | |
127 | dev->features = phy_dev->features & IPVLAN_FEATURES; | |
3518e40b | 128 | dev->features |= NETIF_F_LLTX | NETIF_F_VLAN_CHALLENGED; |
a4d2113e | 129 | dev->hw_enc_features |= dev->features; |
2ad7bf36 | 130 | dev->gso_max_size = phy_dev->gso_max_size; |
f6773c5e | 131 | dev->gso_max_segs = phy_dev->gso_max_segs; |
2ad7bf36 MB |
132 | dev->hard_header_len = phy_dev->hard_header_len; |
133 | ||
87173cd6 | 134 | ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats); |
2ad7bf36 MB |
135 | if (!ipvlan->pcpu_stats) |
136 | return -ENOMEM; | |
137 | ||
fe18da60 GM |
138 | if (!netif_is_ipvlan_port(phy_dev)) { |
139 | err = ipvlan_port_create(phy_dev); | |
140 | if (err < 0) { | |
141 | free_percpu(ipvlan->pcpu_stats); | |
142 | return err; | |
143 | } | |
144 | } | |
145 | port = ipvlan_port_get_rtnl(phy_dev); | |
494e8489 | 146 | port->count += 1; |
2ad7bf36 MB |
147 | return 0; |
148 | } | |
149 | ||
150 | static void ipvlan_uninit(struct net_device *dev) | |
151 | { | |
152 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
fe18da60 GM |
153 | struct net_device *phy_dev = ipvlan->phy_dev; |
154 | struct ipvl_port *port; | |
2ad7bf36 | 155 | |
04901cea | 156 | free_percpu(ipvlan->pcpu_stats); |
2ad7bf36 | 157 | |
fe18da60 | 158 | port = ipvlan_port_get_rtnl(phy_dev); |
2ad7bf36 MB |
159 | port->count -= 1; |
160 | if (!port->count) | |
161 | ipvlan_port_destroy(port->dev); | |
162 | } | |
163 | ||
164 | static int ipvlan_open(struct net_device *dev) | |
165 | { | |
166 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
2ad7bf36 MB |
167 | struct ipvl_addr *addr; |
168 | ||
4fbae7d8 MB |
169 | if (ipvlan->port->mode == IPVLAN_MODE_L3 || |
170 | ipvlan->port->mode == IPVLAN_MODE_L3S) | |
2ad7bf36 MB |
171 | dev->flags |= IFF_NOARP; |
172 | else | |
173 | dev->flags &= ~IFF_NOARP; | |
174 | ||
82308194 PA |
175 | rcu_read_lock(); |
176 | list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) | |
515866f8 | 177 | ipvlan_ht_addr_add(ipvlan, addr); |
82308194 | 178 | rcu_read_unlock(); |
515866f8 | 179 | |
63aae7b1 | 180 | return 0; |
2ad7bf36 MB |
181 | } |
182 | ||
183 | static int ipvlan_stop(struct net_device *dev) | |
184 | { | |
185 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
186 | struct net_device *phy_dev = ipvlan->phy_dev; | |
187 | struct ipvl_addr *addr; | |
188 | ||
189 | dev_uc_unsync(phy_dev, dev); | |
190 | dev_mc_unsync(phy_dev, dev); | |
191 | ||
82308194 PA |
192 | rcu_read_lock(); |
193 | list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) | |
6640e673 | 194 | ipvlan_ht_addr_del(addr); |
82308194 | 195 | rcu_read_unlock(); |
515866f8 | 196 | |
2ad7bf36 MB |
197 | return 0; |
198 | } | |
199 | ||
92c7b0de MB |
200 | static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, |
201 | struct net_device *dev) | |
2ad7bf36 MB |
202 | { |
203 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
204 | int skblen = skb->len; | |
205 | int ret; | |
206 | ||
207 | ret = ipvlan_queue_xmit(skb, dev); | |
208 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
209 | struct ipvl_pcpu_stats *pcptr; | |
210 | ||
211 | pcptr = this_cpu_ptr(ipvlan->pcpu_stats); | |
212 | ||
213 | u64_stats_update_begin(&pcptr->syncp); | |
214 | pcptr->tx_pkts++; | |
215 | pcptr->tx_bytes += skblen; | |
216 | u64_stats_update_end(&pcptr->syncp); | |
217 | } else { | |
218 | this_cpu_inc(ipvlan->pcpu_stats->tx_drps); | |
219 | } | |
220 | return ret; | |
221 | } | |
222 | ||
223 | static netdev_features_t ipvlan_fix_features(struct net_device *dev, | |
224 | netdev_features_t features) | |
225 | { | |
226 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
227 | ||
228 | return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES); | |
229 | } | |
230 | ||
231 | static void ipvlan_change_rx_flags(struct net_device *dev, int change) | |
232 | { | |
233 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
234 | struct net_device *phy_dev = ipvlan->phy_dev; | |
235 | ||
236 | if (change & IFF_ALLMULTI) | |
237 | dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1); | |
238 | } | |
239 | ||
2ad7bf36 MB |
240 | static void ipvlan_set_multicast_mac_filter(struct net_device *dev) |
241 | { | |
242 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
243 | ||
244 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { | |
245 | bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE); | |
246 | } else { | |
247 | struct netdev_hw_addr *ha; | |
248 | DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
249 | ||
250 | bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
251 | netdev_for_each_mc_addr(ha, dev) | |
252 | __set_bit(ipvlan_mac_hash(ha->addr), mc_filters); | |
253 | ||
f631c44b MB |
254 | /* Turn-on broadcast bit irrespective of address family, |
255 | * since broadcast is deferred to a work-queue, hence no | |
256 | * impact on fast-path processing. | |
257 | */ | |
258 | __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters); | |
259 | ||
2ad7bf36 MB |
260 | bitmap_copy(ipvlan->mac_filters, mc_filters, |
261 | IPVLAN_MAC_FILTER_SIZE); | |
262 | } | |
263 | dev_uc_sync(ipvlan->phy_dev, dev); | |
264 | dev_mc_sync(ipvlan->phy_dev, dev); | |
265 | } | |
266 | ||
bc1f4470 | 267 | static void ipvlan_get_stats64(struct net_device *dev, |
268 | struct rtnl_link_stats64 *s) | |
2ad7bf36 MB |
269 | { |
270 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
271 | ||
272 | if (ipvlan->pcpu_stats) { | |
273 | struct ipvl_pcpu_stats *pcptr; | |
274 | u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes; | |
275 | u32 rx_errs = 0, tx_drps = 0; | |
276 | u32 strt; | |
277 | int idx; | |
278 | ||
279 | for_each_possible_cpu(idx) { | |
280 | pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx); | |
281 | do { | |
282 | strt= u64_stats_fetch_begin_irq(&pcptr->syncp); | |
283 | rx_pkts = pcptr->rx_pkts; | |
284 | rx_bytes = pcptr->rx_bytes; | |
285 | rx_mcast = pcptr->rx_mcast; | |
286 | tx_pkts = pcptr->tx_pkts; | |
287 | tx_bytes = pcptr->tx_bytes; | |
288 | } while (u64_stats_fetch_retry_irq(&pcptr->syncp, | |
289 | strt)); | |
290 | ||
291 | s->rx_packets += rx_pkts; | |
292 | s->rx_bytes += rx_bytes; | |
293 | s->multicast += rx_mcast; | |
294 | s->tx_packets += tx_pkts; | |
295 | s->tx_bytes += tx_bytes; | |
296 | ||
297 | /* u32 values are updated without syncp protection. */ | |
298 | rx_errs += pcptr->rx_errs; | |
299 | tx_drps += pcptr->tx_drps; | |
300 | } | |
301 | s->rx_errors = rx_errs; | |
302 | s->rx_dropped = rx_errs; | |
303 | s->tx_dropped = tx_drps; | |
304 | } | |
2ad7bf36 MB |
305 | } |
306 | ||
307 | static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) | |
308 | { | |
309 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
310 | struct net_device *phy_dev = ipvlan->phy_dev; | |
311 | ||
312 | return vlan_vid_add(phy_dev, proto, vid); | |
313 | } | |
314 | ||
315 | static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, | |
316 | u16 vid) | |
317 | { | |
318 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
319 | struct net_device *phy_dev = ipvlan->phy_dev; | |
320 | ||
321 | vlan_vid_del(phy_dev, proto, vid); | |
322 | return 0; | |
323 | } | |
324 | ||
7c411658 ND |
325 | static int ipvlan_get_iflink(const struct net_device *dev) |
326 | { | |
327 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
328 | ||
329 | return ipvlan->phy_dev->ifindex; | |
330 | } | |
331 | ||
2ad7bf36 MB |
332 | static const struct net_device_ops ipvlan_netdev_ops = { |
333 | .ndo_init = ipvlan_init, | |
334 | .ndo_uninit = ipvlan_uninit, | |
335 | .ndo_open = ipvlan_open, | |
336 | .ndo_stop = ipvlan_stop, | |
337 | .ndo_start_xmit = ipvlan_start_xmit, | |
338 | .ndo_fix_features = ipvlan_fix_features, | |
339 | .ndo_change_rx_flags = ipvlan_change_rx_flags, | |
340 | .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter, | |
341 | .ndo_get_stats64 = ipvlan_get_stats64, | |
342 | .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid, | |
343 | .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid, | |
7c411658 | 344 | .ndo_get_iflink = ipvlan_get_iflink, |
2ad7bf36 MB |
345 | }; |
346 | ||
347 | static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
348 | unsigned short type, const void *daddr, | |
349 | const void *saddr, unsigned len) | |
350 | { | |
351 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
352 | struct net_device *phy_dev = ipvlan->phy_dev; | |
353 | ||
354 | /* TODO Probably use a different field than dev_addr so that the | |
355 | * mac-address on the virtual device is portable and can be carried | |
356 | * while the packets use the mac-addr on the physical device. | |
357 | */ | |
358 | return dev_hard_header(skb, phy_dev, type, daddr, | |
32c10bbf | 359 | saddr ? : phy_dev->dev_addr, len); |
2ad7bf36 MB |
360 | } |
361 | ||
362 | static const struct header_ops ipvlan_header_ops = { | |
363 | .create = ipvlan_hard_header, | |
2ad7bf36 MB |
364 | .parse = eth_header_parse, |
365 | .cache = eth_header_cache, | |
366 | .cache_update = eth_header_cache_update, | |
367 | }; | |
368 | ||
c675e06a DB |
369 | static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev) |
370 | { | |
371 | ipvlan->dev->mtu = dev->mtu; | |
372 | } | |
373 | ||
1ec54cb4 PA |
374 | static bool netif_is_ipvlan(const struct net_device *dev) |
375 | { | |
376 | /* both ipvlan and ipvtap devices use the same netdev_ops */ | |
377 | return dev->netdev_ops == &ipvlan_netdev_ops; | |
378 | } | |
379 | ||
314d10d7 DD |
380 | static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev, |
381 | struct ethtool_link_ksettings *cmd) | |
2ad7bf36 MB |
382 | { |
383 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
384 | ||
314d10d7 | 385 | return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd); |
2ad7bf36 MB |
386 | } |
387 | ||
388 | static void ipvlan_ethtool_get_drvinfo(struct net_device *dev, | |
389 | struct ethtool_drvinfo *drvinfo) | |
390 | { | |
391 | strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver)); | |
392 | strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version)); | |
393 | } | |
394 | ||
395 | static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev) | |
396 | { | |
397 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
398 | ||
399 | return ipvlan->msg_enable; | |
400 | } | |
401 | ||
402 | static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value) | |
403 | { | |
404 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
405 | ||
406 | ipvlan->msg_enable = value; | |
407 | } | |
408 | ||
409 | static const struct ethtool_ops ipvlan_ethtool_ops = { | |
410 | .get_link = ethtool_op_get_link, | |
314d10d7 | 411 | .get_link_ksettings = ipvlan_ethtool_get_link_ksettings, |
2ad7bf36 MB |
412 | .get_drvinfo = ipvlan_ethtool_get_drvinfo, |
413 | .get_msglevel = ipvlan_ethtool_get_msglevel, | |
414 | .set_msglevel = ipvlan_ethtool_set_msglevel, | |
415 | }; | |
416 | ||
417 | static int ipvlan_nl_changelink(struct net_device *dev, | |
ad744b22 MS |
418 | struct nlattr *tb[], struct nlattr *data[], |
419 | struct netlink_ext_ack *extack) | |
2ad7bf36 MB |
420 | { |
421 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
422 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
4fbae7d8 | 423 | int err = 0; |
2ad7bf36 | 424 | |
a190d04d MB |
425 | if (!data) |
426 | return 0; | |
7cc9f700 DB |
427 | if (!ns_capable(dev_net(ipvlan->phy_dev)->user_ns, CAP_NET_ADMIN)) |
428 | return -EPERM; | |
a190d04d MB |
429 | |
430 | if (data[IFLA_IPVLAN_MODE]) { | |
2ad7bf36 MB |
431 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
432 | ||
cf7686a0 | 433 | err = ipvlan_set_port_mode(port, nmode, extack); |
2ad7bf36 | 434 | } |
a190d04d MB |
435 | |
436 | if (!err && data[IFLA_IPVLAN_FLAGS]) { | |
437 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
438 | ||
439 | if (flags & IPVLAN_F_PRIVATE) | |
440 | ipvlan_mark_private(port); | |
441 | else | |
442 | ipvlan_clear_private(port); | |
fe89aa6b MB |
443 | |
444 | if (flags & IPVLAN_F_VEPA) | |
445 | ipvlan_mark_vepa(port); | |
446 | else | |
447 | ipvlan_clear_vepa(port); | |
a190d04d MB |
448 | } |
449 | ||
4fbae7d8 | 450 | return err; |
2ad7bf36 MB |
451 | } |
452 | ||
453 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
454 | { | |
455 | return (0 | |
456 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
a190d04d | 457 | + nla_total_size(2) /* IFLA_IPVLAN_FLAGS */ |
2ad7bf36 MB |
458 | ); |
459 | } | |
460 | ||
a8b8a889 MS |
461 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[], |
462 | struct netlink_ext_ack *extack) | |
2ad7bf36 | 463 | { |
a190d04d MB |
464 | if (!data) |
465 | return 0; | |
466 | ||
467 | if (data[IFLA_IPVLAN_MODE]) { | |
2ad7bf36 MB |
468 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
469 | ||
b1dd054d | 470 | if (mode >= IPVLAN_MODE_MAX) |
2ad7bf36 MB |
471 | return -EINVAL; |
472 | } | |
a190d04d MB |
473 | if (data[IFLA_IPVLAN_FLAGS]) { |
474 | u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
475 | ||
fe89aa6b MB |
476 | /* Only two bits are used at this moment. */ |
477 | if (flags & ~(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
478 | return -EINVAL; | |
479 | /* Also both flags can't be active at the same time. */ | |
480 | if ((flags & (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) == | |
481 | (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) | |
a190d04d MB |
482 | return -EINVAL; |
483 | } | |
484 | ||
2ad7bf36 MB |
485 | return 0; |
486 | } | |
487 | ||
488 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
489 | const struct net_device *dev) | |
490 | { | |
491 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
492 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
493 | int ret = -EINVAL; | |
494 | ||
495 | if (!port) | |
496 | goto err; | |
497 | ||
498 | ret = -EMSGSIZE; | |
499 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
500 | goto err; | |
a190d04d MB |
501 | if (nla_put_u16(skb, IFLA_IPVLAN_FLAGS, port->flags)) |
502 | goto err; | |
2ad7bf36 MB |
503 | |
504 | return 0; | |
505 | ||
506 | err: | |
507 | return ret; | |
508 | } | |
509 | ||
235a9d89 | 510 | int ipvlan_link_new(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
511 | struct nlattr *tb[], struct nlattr *data[], |
512 | struct netlink_ext_ack *extack) | |
2ad7bf36 MB |
513 | { |
514 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
515 | struct ipvl_port *port; | |
516 | struct net_device *phy_dev; | |
517 | int err; | |
e93fbc5a | 518 | u16 mode = IPVLAN_MODE_L3; |
2ad7bf36 MB |
519 | |
520 | if (!tb[IFLA_LINK]) | |
521 | return -EINVAL; | |
522 | ||
523 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
524 | if (!phy_dev) | |
525 | return -ENODEV; | |
526 | ||
5933fea7 | 527 | if (netif_is_ipvlan(phy_dev)) { |
2ad7bf36 MB |
528 | struct ipvl_dev *tmp = netdev_priv(phy_dev); |
529 | ||
530 | phy_dev = tmp->phy_dev; | |
7cc9f700 DB |
531 | if (!ns_capable(dev_net(phy_dev)->user_ns, CAP_NET_ADMIN)) |
532 | return -EPERM; | |
5933fea7 | 533 | } else if (!netif_is_ipvlan_port(phy_dev)) { |
fe18da60 GM |
534 | /* Exit early if the underlying link is invalid or busy */ |
535 | if (phy_dev->type != ARPHRD_ETHER || | |
536 | phy_dev->flags & IFF_LOOPBACK) { | |
537 | netdev_err(phy_dev, | |
538 | "Master is either lo or non-ether device\n"); | |
539 | return -EINVAL; | |
540 | } | |
2ad7bf36 | 541 | |
fe18da60 GM |
542 | if (netdev_is_rx_handler_busy(phy_dev)) { |
543 | netdev_err(phy_dev, "Device is already in use.\n"); | |
544 | return -EBUSY; | |
545 | } | |
546 | } | |
2ad7bf36 MB |
547 | |
548 | ipvlan->phy_dev = phy_dev; | |
549 | ipvlan->dev = dev; | |
2ad7bf36 | 550 | ipvlan->sfeatures = IPVLAN_FEATURES; |
30877961 XL |
551 | if (!tb[IFLA_MTU]) |
552 | ipvlan_adjust_mtu(ipvlan, phy_dev); | |
2ad7bf36 | 553 | INIT_LIST_HEAD(&ipvlan->addrs); |
82308194 | 554 | spin_lock_init(&ipvlan->addrs_lock); |
2ad7bf36 | 555 | |
fe18da60 GM |
556 | /* TODO Probably put random address here to be presented to the |
557 | * world but keep using the physical-dev address for the outgoing | |
558 | * packets. | |
a190d04d | 559 | */ |
fe18da60 GM |
560 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); |
561 | ||
f5426250 PA |
562 | dev->priv_flags |= IFF_NO_RX_HANDLER; |
563 | ||
fe18da60 GM |
564 | err = register_netdevice(dev); |
565 | if (err < 0) | |
566 | return err; | |
567 | ||
568 | /* ipvlan_init() would have created the port, if required */ | |
569 | port = ipvlan_port_get_rtnl(phy_dev); | |
570 | ipvlan->port = port; | |
a190d04d | 571 | |
da36e13c MB |
572 | /* If the port-id base is at the MAX value, then wrap it around and |
573 | * begin from 0x1 again. This may be due to a busy system where lots | |
574 | * of slaves are getting created and deleted. | |
575 | */ | |
576 | if (port->dev_id_start == 0xFFFE) | |
577 | port->dev_id_start = 0x1; | |
578 | ||
009146d1 MB |
579 | /* Since L2 address is shared among all IPvlan slaves including |
580 | * master, use unique 16 bit dev-ids to diffentiate among them. | |
581 | * Assign IDs between 0x1 and 0xFFFE (used by the master) to each | |
582 | * slave link [see addrconf_ifid_eui48()]. | |
583 | */ | |
da36e13c MB |
584 | err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE, |
585 | GFP_KERNEL); | |
019ec003 MB |
586 | if (err < 0) |
587 | err = ida_simple_get(&port->ida, 0x1, port->dev_id_start, | |
588 | GFP_KERNEL); | |
009146d1 | 589 | if (err < 0) |
fe18da60 | 590 | goto unregister_netdev; |
009146d1 | 591 | dev->dev_id = err; |
fe18da60 | 592 | |
da36e13c MB |
593 | /* Increment id-base to the next slot for the future assignment */ |
594 | port->dev_id_start = err + 1; | |
009146d1 | 595 | |
fe18da60 GM |
596 | err = netdev_upper_dev_link(phy_dev, dev, extack); |
597 | if (err) | |
598 | goto remove_ida; | |
2ad7bf36 | 599 | |
fe18da60 GM |
600 | /* Flags are per port and latest update overrides. User has |
601 | * to be consistent in setting it just like the mode attribute. | |
602 | */ | |
603 | if (data && data[IFLA_IPVLAN_FLAGS]) | |
604 | port->flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); | |
2ad7bf36 | 605 | |
fe18da60 GM |
606 | if (data && data[IFLA_IPVLAN_MODE]) |
607 | mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
2ad7bf36 | 608 | |
cf7686a0 | 609 | err = ipvlan_set_port_mode(port, mode, extack); |
fe18da60 | 610 | if (err) |
1a31cc86 | 611 | goto unlink_netdev; |
2ad7bf36 MB |
612 | |
613 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
614 | netif_stacked_transfer_operstate(phy_dev, dev); | |
615 | return 0; | |
147fd287 | 616 | |
1a31cc86 GF |
617 | unlink_netdev: |
618 | netdev_upper_dev_unlink(phy_dev, dev); | |
009146d1 MB |
619 | remove_ida: |
620 | ida_simple_remove(&port->ida, dev->dev_id); | |
fe18da60 GM |
621 | unregister_netdev: |
622 | unregister_netdevice(dev); | |
147fd287 | 623 | return err; |
2ad7bf36 | 624 | } |
235a9d89 | 625 | EXPORT_SYMBOL_GPL(ipvlan_link_new); |
2ad7bf36 | 626 | |
235a9d89 | 627 | void ipvlan_link_delete(struct net_device *dev, struct list_head *head) |
2ad7bf36 MB |
628 | { |
629 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
630 | struct ipvl_addr *addr, *next; | |
631 | ||
82308194 | 632 | spin_lock_bh(&ipvlan->addrs_lock); |
515866f8 | 633 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { |
6640e673 | 634 | ipvlan_ht_addr_del(addr); |
82308194 | 635 | list_del_rcu(&addr->anode); |
6a725497 | 636 | kfree_rcu(addr, rcu); |
2ad7bf36 | 637 | } |
82308194 | 638 | spin_unlock_bh(&ipvlan->addrs_lock); |
515866f8 | 639 | |
009146d1 | 640 | ida_simple_remove(&ipvlan->port->ida, dev->dev_id); |
2ad7bf36 MB |
641 | list_del_rcu(&ipvlan->pnode); |
642 | unregister_netdevice_queue(dev, head); | |
643 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
644 | } | |
235a9d89 | 645 | EXPORT_SYMBOL_GPL(ipvlan_link_delete); |
2ad7bf36 | 646 | |
235a9d89 | 647 | void ipvlan_link_setup(struct net_device *dev) |
2ad7bf36 MB |
648 | { |
649 | ether_setup(dev); | |
650 | ||
548feb33 | 651 | dev->max_mtu = ETH_MAX_MTU; |
2ad7bf36 | 652 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
bf485bcf | 653 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE; |
2ad7bf36 | 654 | dev->netdev_ops = &ipvlan_netdev_ops; |
cf124db5 | 655 | dev->needs_free_netdev = true; |
2ad7bf36 MB |
656 | dev->header_ops = &ipvlan_header_ops; |
657 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
2ad7bf36 | 658 | } |
235a9d89 | 659 | EXPORT_SYMBOL_GPL(ipvlan_link_setup); |
2ad7bf36 MB |
660 | |
661 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
662 | { | |
663 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
a190d04d | 664 | [IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 }, |
2ad7bf36 MB |
665 | }; |
666 | ||
667 | static struct rtnl_link_ops ipvlan_link_ops = { | |
668 | .kind = "ipvlan", | |
669 | .priv_size = sizeof(struct ipvl_dev), | |
670 | ||
2ad7bf36 MB |
671 | .setup = ipvlan_link_setup, |
672 | .newlink = ipvlan_link_new, | |
673 | .dellink = ipvlan_link_delete, | |
674 | }; | |
675 | ||
235a9d89 | 676 | int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 | 677 | { |
235a9d89 SG |
678 | ops->get_size = ipvlan_nl_getsize; |
679 | ops->policy = ipvlan_nl_policy; | |
680 | ops->validate = ipvlan_nl_validate; | |
681 | ops->fill_info = ipvlan_nl_fillinfo; | |
682 | ops->changelink = ipvlan_nl_changelink; | |
683 | ops->maxtype = IFLA_IPVLAN_MAX; | |
2ad7bf36 MB |
684 | return rtnl_link_register(ops); |
685 | } | |
235a9d89 | 686 | EXPORT_SYMBOL_GPL(ipvlan_link_register); |
2ad7bf36 MB |
687 | |
688 | static int ipvlan_device_event(struct notifier_block *unused, | |
689 | unsigned long event, void *ptr) | |
690 | { | |
61345fab PM |
691 | struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); |
692 | struct netdev_notifier_pre_changeaddr_info *prechaddr_info; | |
2ad7bf36 MB |
693 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
694 | struct ipvl_dev *ipvlan, *next; | |
695 | struct ipvl_port *port; | |
696 | LIST_HEAD(lst_kill); | |
61345fab | 697 | int err; |
2ad7bf36 | 698 | |
5933fea7 | 699 | if (!netif_is_ipvlan_port(dev)) |
2ad7bf36 MB |
700 | return NOTIFY_DONE; |
701 | ||
702 | port = ipvlan_port_get_rtnl(dev); | |
703 | ||
704 | switch (event) { | |
705 | case NETDEV_CHANGE: | |
706 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
707 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
708 | ipvlan->dev); | |
709 | break; | |
710 | ||
3133822f FW |
711 | case NETDEV_REGISTER: { |
712 | struct net *oldnet, *newnet = dev_net(dev); | |
3133822f FW |
713 | |
714 | oldnet = read_pnet(&port->pnet); | |
715 | if (net_eq(newnet, oldnet)) | |
716 | break; | |
717 | ||
718 | write_pnet(&port->pnet, newnet); | |
719 | ||
c675e06a | 720 | ipvlan_migrate_l3s_hook(oldnet, newnet); |
3133822f FW |
721 | break; |
722 | } | |
2ad7bf36 MB |
723 | case NETDEV_UNREGISTER: |
724 | if (dev->reg_state != NETREG_UNREGISTERING) | |
725 | break; | |
726 | ||
82308194 | 727 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, pnode) |
2ad7bf36 MB |
728 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, |
729 | &lst_kill); | |
730 | unregister_netdevice_many(&lst_kill); | |
731 | break; | |
732 | ||
733 | case NETDEV_FEAT_CHANGE: | |
734 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
735 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
736 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
f6773c5e | 737 | ipvlan->dev->gso_max_segs = dev->gso_max_segs; |
2ad7bf36 MB |
738 | netdev_features_change(ipvlan->dev); |
739 | } | |
740 | break; | |
741 | ||
742 | case NETDEV_CHANGEMTU: | |
743 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
744 | ipvlan_adjust_mtu(ipvlan, dev); | |
745 | break; | |
746 | ||
61345fab PM |
747 | case NETDEV_PRE_CHANGEADDR: |
748 | prechaddr_info = ptr; | |
749 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
750 | err = dev_pre_changeaddr_notify(ipvlan->dev, | |
751 | prechaddr_info->dev_addr, | |
752 | extack); | |
753 | if (err) | |
754 | return notifier_from_errno(err); | |
755 | } | |
756 | break; | |
757 | ||
32c10bbf | 758 | case NETDEV_CHANGEADDR: |
ab452c3c | 759 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
32c10bbf | 760 | ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr); |
ab452c3c KL |
761 | call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev); |
762 | } | |
32c10bbf MB |
763 | break; |
764 | ||
2ad7bf36 MB |
765 | case NETDEV_PRE_TYPE_CHANGE: |
766 | /* Forbid underlying device to change its type. */ | |
767 | return NOTIFY_BAD; | |
768 | } | |
769 | return NOTIFY_DONE; | |
770 | } | |
771 | ||
82308194 | 772 | /* the caller must held the addrs lock */ |
86673982 | 773 | static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
774 | { |
775 | struct ipvl_addr *addr; | |
776 | ||
2ad7bf36 MB |
777 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); |
778 | if (!addr) | |
779 | return -ENOMEM; | |
780 | ||
781 | addr->master = ipvlan; | |
94333fac | 782 | if (!is_v6) { |
86673982 GF |
783 | memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr)); |
784 | addr->atype = IPVL_IPV4; | |
94333fac MC |
785 | #if IS_ENABLED(CONFIG_IPV6) |
786 | } else { | |
787 | memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr)); | |
788 | addr->atype = IPVL_IPV6; | |
789 | #endif | |
86673982 | 790 | } |
82308194 PA |
791 | |
792 | list_add_tail_rcu(&addr->anode, &ipvlan->addrs); | |
515866f8 | 793 | |
27705f70 JB |
794 | /* If the interface is not up, the address will be added to the hash |
795 | * list by ipvlan_open. | |
796 | */ | |
797 | if (netif_running(ipvlan->dev)) | |
798 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
799 | |
800 | return 0; | |
801 | } | |
802 | ||
86673982 | 803 | static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
804 | { |
805 | struct ipvl_addr *addr; | |
806 | ||
82308194 | 807 | spin_lock_bh(&ipvlan->addrs_lock); |
86673982 | 808 | addr = ipvlan_find_addr(ipvlan, iaddr, is_v6); |
82308194 PA |
809 | if (!addr) { |
810 | spin_unlock_bh(&ipvlan->addrs_lock); | |
2ad7bf36 | 811 | return; |
82308194 | 812 | } |
2ad7bf36 | 813 | |
6640e673 | 814 | ipvlan_ht_addr_del(addr); |
82308194 PA |
815 | list_del_rcu(&addr->anode); |
816 | spin_unlock_bh(&ipvlan->addrs_lock); | |
2ad7bf36 | 817 | kfree_rcu(addr, rcu); |
2ad7bf36 MB |
818 | } |
819 | ||
94333fac MC |
820 | static bool ipvlan_is_valid_dev(const struct net_device *dev) |
821 | { | |
822 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
823 | ||
824 | if (!netif_is_ipvlan(dev)) | |
825 | return false; | |
826 | ||
827 | if (!ipvlan || !ipvlan->port) | |
828 | return false; | |
829 | ||
830 | return true; | |
831 | } | |
832 | ||
833 | #if IS_ENABLED(CONFIG_IPV6) | |
86673982 GF |
834 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) |
835 | { | |
82308194 PA |
836 | int ret = -EINVAL; |
837 | ||
838 | spin_lock_bh(&ipvlan->addrs_lock); | |
839 | if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) | |
86673982 GF |
840 | netif_err(ipvlan, ifup, ipvlan->dev, |
841 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
842 | ip6_addr, ipvlan->dev->name); | |
82308194 PA |
843 | else |
844 | ret = ipvlan_add_addr(ipvlan, ip6_addr, true); | |
845 | spin_unlock_bh(&ipvlan->addrs_lock); | |
846 | return ret; | |
86673982 GF |
847 | } |
848 | ||
849 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
850 | { | |
851 | return ipvlan_del_addr(ipvlan, ip6_addr, true); | |
852 | } | |
853 | ||
2ad7bf36 MB |
854 | static int ipvlan_addr6_event(struct notifier_block *unused, |
855 | unsigned long event, void *ptr) | |
856 | { | |
857 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
858 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
859 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
860 | ||
5e51fe6f | 861 | if (!ipvlan_is_valid_dev(dev)) |
2ad7bf36 MB |
862 | return NOTIFY_DONE; |
863 | ||
864 | switch (event) { | |
865 | case NETDEV_UP: | |
866 | if (ipvlan_add_addr6(ipvlan, &if6->addr)) | |
867 | return NOTIFY_BAD; | |
868 | break; | |
869 | ||
870 | case NETDEV_DOWN: | |
871 | ipvlan_del_addr6(ipvlan, &if6->addr); | |
872 | break; | |
873 | } | |
874 | ||
875 | return NOTIFY_OK; | |
876 | } | |
877 | ||
3ad7d246 KJ |
878 | static int ipvlan_addr6_validator_event(struct notifier_block *unused, |
879 | unsigned long event, void *ptr) | |
880 | { | |
881 | struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr; | |
882 | struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev; | |
883 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
884 | ||
5e51fe6f | 885 | if (!ipvlan_is_valid_dev(dev)) |
3ad7d246 KJ |
886 | return NOTIFY_DONE; |
887 | ||
888 | switch (event) { | |
889 | case NETDEV_UP: | |
de95e047 DA |
890 | if (ipvlan_addr_busy(ipvlan->port, &i6vi->i6vi_addr, true)) { |
891 | NL_SET_ERR_MSG(i6vi->extack, | |
892 | "Address already assigned to an ipvlan device"); | |
3ad7d246 | 893 | return notifier_from_errno(-EADDRINUSE); |
de95e047 | 894 | } |
3ad7d246 KJ |
895 | break; |
896 | } | |
897 | ||
898 | return NOTIFY_OK; | |
899 | } | |
94333fac | 900 | #endif |
3ad7d246 | 901 | |
2ad7bf36 MB |
902 | static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) |
903 | { | |
82308194 PA |
904 | int ret = -EINVAL; |
905 | ||
906 | spin_lock_bh(&ipvlan->addrs_lock); | |
907 | if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) | |
2ad7bf36 MB |
908 | netif_err(ipvlan, ifup, ipvlan->dev, |
909 | "Failed to add IPv4=%pI4 on %s intf.\n", | |
910 | ip4_addr, ipvlan->dev->name); | |
82308194 PA |
911 | else |
912 | ret = ipvlan_add_addr(ipvlan, ip4_addr, false); | |
913 | spin_unlock_bh(&ipvlan->addrs_lock); | |
914 | return ret; | |
2ad7bf36 MB |
915 | } |
916 | ||
917 | static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
918 | { | |
86673982 | 919 | return ipvlan_del_addr(ipvlan, ip4_addr, false); |
2ad7bf36 MB |
920 | } |
921 | ||
922 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
923 | unsigned long event, void *ptr) | |
924 | { | |
925 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
926 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
927 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
928 | struct in_addr ip4_addr; | |
929 | ||
5e51fe6f | 930 | if (!ipvlan_is_valid_dev(dev)) |
2ad7bf36 MB |
931 | return NOTIFY_DONE; |
932 | ||
933 | switch (event) { | |
934 | case NETDEV_UP: | |
935 | ip4_addr.s_addr = if4->ifa_address; | |
936 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
937 | return NOTIFY_BAD; | |
938 | break; | |
939 | ||
940 | case NETDEV_DOWN: | |
941 | ip4_addr.s_addr = if4->ifa_address; | |
942 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
943 | break; | |
944 | } | |
945 | ||
946 | return NOTIFY_OK; | |
947 | } | |
948 | ||
3ad7d246 KJ |
949 | static int ipvlan_addr4_validator_event(struct notifier_block *unused, |
950 | unsigned long event, void *ptr) | |
951 | { | |
952 | struct in_validator_info *ivi = (struct in_validator_info *)ptr; | |
953 | struct net_device *dev = (struct net_device *)ivi->ivi_dev->dev; | |
954 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
955 | ||
5e51fe6f | 956 | if (!ipvlan_is_valid_dev(dev)) |
3ad7d246 KJ |
957 | return NOTIFY_DONE; |
958 | ||
959 | switch (event) { | |
960 | case NETDEV_UP: | |
de95e047 DA |
961 | if (ipvlan_addr_busy(ipvlan->port, &ivi->ivi_addr, false)) { |
962 | NL_SET_ERR_MSG(ivi->extack, | |
963 | "Address already assigned to an ipvlan device"); | |
3ad7d246 | 964 | return notifier_from_errno(-EADDRINUSE); |
de95e047 | 965 | } |
3ad7d246 KJ |
966 | break; |
967 | } | |
968 | ||
969 | return NOTIFY_OK; | |
970 | } | |
971 | ||
2ad7bf36 MB |
972 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { |
973 | .notifier_call = ipvlan_addr4_event, | |
974 | }; | |
975 | ||
3ad7d246 KJ |
976 | static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly = { |
977 | .notifier_call = ipvlan_addr4_validator_event, | |
978 | }; | |
979 | ||
2ad7bf36 MB |
980 | static struct notifier_block ipvlan_notifier_block __read_mostly = { |
981 | .notifier_call = ipvlan_device_event, | |
982 | }; | |
983 | ||
94333fac | 984 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 MB |
985 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { |
986 | .notifier_call = ipvlan_addr6_event, | |
987 | }; | |
988 | ||
3ad7d246 KJ |
989 | static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = { |
990 | .notifier_call = ipvlan_addr6_validator_event, | |
991 | }; | |
94333fac | 992 | #endif |
3ad7d246 | 993 | |
2ad7bf36 MB |
994 | static int __init ipvlan_init_module(void) |
995 | { | |
996 | int err; | |
997 | ||
998 | ipvlan_init_secret(); | |
999 | register_netdevice_notifier(&ipvlan_notifier_block); | |
94333fac | 1000 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1001 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1002 | register_inet6addr_validator_notifier( |
1003 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1004 | #endif |
2ad7bf36 | 1005 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); |
3ad7d246 | 1006 | register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block); |
2ad7bf36 | 1007 | |
c675e06a | 1008 | err = ipvlan_l3s_init(); |
2ad7bf36 MB |
1009 | if (err < 0) |
1010 | goto error; | |
1011 | ||
3133822f FW |
1012 | err = ipvlan_link_register(&ipvlan_link_ops); |
1013 | if (err < 0) { | |
c675e06a | 1014 | ipvlan_l3s_cleanup(); |
3133822f FW |
1015 | goto error; |
1016 | } | |
1017 | ||
2ad7bf36 MB |
1018 | return 0; |
1019 | error: | |
1020 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
3ad7d246 KJ |
1021 | unregister_inetaddr_validator_notifier( |
1022 | &ipvlan_addr4_vtor_notifier_block); | |
94333fac | 1023 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1024 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1025 | unregister_inet6addr_validator_notifier( |
1026 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1027 | #endif |
2ad7bf36 MB |
1028 | unregister_netdevice_notifier(&ipvlan_notifier_block); |
1029 | return err; | |
1030 | } | |
1031 | ||
1032 | static void __exit ipvlan_cleanup_module(void) | |
1033 | { | |
1034 | rtnl_link_unregister(&ipvlan_link_ops); | |
c675e06a | 1035 | ipvlan_l3s_cleanup(); |
2ad7bf36 MB |
1036 | unregister_netdevice_notifier(&ipvlan_notifier_block); |
1037 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
3ad7d246 KJ |
1038 | unregister_inetaddr_validator_notifier( |
1039 | &ipvlan_addr4_vtor_notifier_block); | |
94333fac | 1040 | #if IS_ENABLED(CONFIG_IPV6) |
2ad7bf36 | 1041 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
3ad7d246 KJ |
1042 | unregister_inet6addr_validator_notifier( |
1043 | &ipvlan_addr6_vtor_notifier_block); | |
94333fac | 1044 | #endif |
2ad7bf36 MB |
1045 | } |
1046 | ||
1047 | module_init(ipvlan_init_module); | |
1048 | module_exit(ipvlan_cleanup_module); | |
1049 | ||
1050 | MODULE_LICENSE("GPL"); | |
1051 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
1052 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
1053 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |