]>
Commit | Line | Data |
---|---|---|
2ad7bf36 MB |
1 | /* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com> |
2 | * | |
3 | * This program is free software; you can redistribute it and/or | |
4 | * modify it under the terms of the GNU General Public License as | |
5 | * published by the Free Software Foundation; either version 2 of | |
6 | * the License, or (at your option) any later version. | |
7 | * | |
8 | */ | |
9 | ||
10 | #include "ipvlan.h" | |
11 | ||
4fbae7d8 MB |
12 | static u32 ipvl_nf_hook_refcnt = 0; |
13 | ||
14 | static struct nf_hook_ops ipvl_nfops[] __read_mostly = { | |
15 | { | |
16 | .hook = ipvlan_nf_input, | |
17 | .pf = NFPROTO_IPV4, | |
18 | .hooknum = NF_INET_LOCAL_IN, | |
19 | .priority = INT_MAX, | |
20 | }, | |
21 | { | |
22 | .hook = ipvlan_nf_input, | |
23 | .pf = NFPROTO_IPV6, | |
24 | .hooknum = NF_INET_LOCAL_IN, | |
25 | .priority = INT_MAX, | |
26 | }, | |
27 | }; | |
28 | ||
ab530f63 | 29 | static const struct l3mdev_ops ipvl_l3mdev_ops = { |
4fbae7d8 MB |
30 | .l3mdev_l3_rcv = ipvlan_l3_rcv, |
31 | }; | |
32 | ||
ab5b7013 | 33 | static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev) |
2ad7bf36 | 34 | { |
8f679ed8 | 35 | ipvlan->dev->mtu = dev->mtu; |
2ad7bf36 MB |
36 | } |
37 | ||
4fbae7d8 MB |
38 | static int ipvlan_register_nf_hook(void) |
39 | { | |
40 | int err = 0; | |
41 | ||
42 | if (!ipvl_nf_hook_refcnt) { | |
43 | err = _nf_register_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops)); | |
44 | if (!err) | |
45 | ipvl_nf_hook_refcnt = 1; | |
46 | } else { | |
47 | ipvl_nf_hook_refcnt++; | |
48 | } | |
49 | ||
50 | return err; | |
51 | } | |
52 | ||
53 | static void ipvlan_unregister_nf_hook(void) | |
54 | { | |
55 | WARN_ON(!ipvl_nf_hook_refcnt); | |
56 | ||
57 | ipvl_nf_hook_refcnt--; | |
58 | if (!ipvl_nf_hook_refcnt) | |
59 | _nf_unregister_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops)); | |
60 | } | |
61 | ||
62 | static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval) | |
2ad7bf36 MB |
63 | { |
64 | struct ipvl_dev *ipvlan; | |
4fbae7d8 MB |
65 | struct net_device *mdev = port->dev; |
66 | int err = 0; | |
2ad7bf36 | 67 | |
4fbae7d8 | 68 | ASSERT_RTNL(); |
2ad7bf36 | 69 | if (port->mode != nval) { |
4fbae7d8 MB |
70 | if (nval == IPVLAN_MODE_L3S) { |
71 | /* New mode is L3S */ | |
72 | err = ipvlan_register_nf_hook(); | |
73 | if (!err) { | |
74 | mdev->l3mdev_ops = &ipvl_l3mdev_ops; | |
75 | mdev->priv_flags |= IFF_L3MDEV_MASTER; | |
76 | } else | |
77 | return err; | |
78 | } else if (port->mode == IPVLAN_MODE_L3S) { | |
79 | /* Old mode was L3S */ | |
80 | mdev->priv_flags &= ~IFF_L3MDEV_MASTER; | |
81 | ipvlan_unregister_nf_hook(); | |
82 | mdev->l3mdev_ops = NULL; | |
83 | } | |
2ad7bf36 | 84 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
4fbae7d8 | 85 | if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S) |
2ad7bf36 MB |
86 | ipvlan->dev->flags |= IFF_NOARP; |
87 | else | |
88 | ipvlan->dev->flags &= ~IFF_NOARP; | |
89 | } | |
90 | port->mode = nval; | |
91 | } | |
4fbae7d8 | 92 | return err; |
2ad7bf36 MB |
93 | } |
94 | ||
95 | static int ipvlan_port_create(struct net_device *dev) | |
96 | { | |
97 | struct ipvl_port *port; | |
98 | int err, idx; | |
99 | ||
100 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) { | |
101 | netdev_err(dev, "Master is either lo or non-ether device\n"); | |
102 | return -EINVAL; | |
103 | } | |
764e433b MB |
104 | |
105 | if (netif_is_macvlan_port(dev)) { | |
106 | netdev_err(dev, "Master is a macvlan port.\n"); | |
107 | return -EBUSY; | |
108 | } | |
109 | ||
2ad7bf36 MB |
110 | port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL); |
111 | if (!port) | |
112 | return -ENOMEM; | |
113 | ||
114 | port->dev = dev; | |
115 | port->mode = IPVLAN_MODE_L3; | |
116 | INIT_LIST_HEAD(&port->ipvlans); | |
117 | for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++) | |
118 | INIT_HLIST_HEAD(&port->hlhead[idx]); | |
119 | ||
ba35f858 MB |
120 | skb_queue_head_init(&port->backlog); |
121 | INIT_WORK(&port->wq, ipvlan_process_multicast); | |
009146d1 | 122 | ida_init(&port->ida); |
ba35f858 | 123 | |
2ad7bf36 MB |
124 | err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port); |
125 | if (err) | |
126 | goto err; | |
127 | ||
128 | dev->priv_flags |= IFF_IPVLAN_MASTER; | |
129 | return 0; | |
130 | ||
131 | err: | |
48140a21 | 132 | kfree(port); |
2ad7bf36 MB |
133 | return err; |
134 | } | |
135 | ||
136 | static void ipvlan_port_destroy(struct net_device *dev) | |
137 | { | |
138 | struct ipvl_port *port = ipvlan_port_get_rtnl(dev); | |
b1227d01 | 139 | struct sk_buff *skb; |
2ad7bf36 MB |
140 | |
141 | dev->priv_flags &= ~IFF_IPVLAN_MASTER; | |
4fbae7d8 MB |
142 | if (port->mode == IPVLAN_MODE_L3S) { |
143 | dev->priv_flags &= ~IFF_L3MDEV_MASTER; | |
144 | ipvlan_unregister_nf_hook(); | |
145 | dev->l3mdev_ops = NULL; | |
146 | } | |
2ad7bf36 | 147 | netdev_rx_handler_unregister(dev); |
ba35f858 | 148 | cancel_work_sync(&port->wq); |
b1227d01 ED |
149 | while ((skb = __skb_dequeue(&port->backlog)) != NULL) { |
150 | if (skb->dev) | |
151 | dev_put(skb->dev); | |
152 | kfree_skb(skb); | |
153 | } | |
009146d1 | 154 | ida_destroy(&port->ida); |
48140a21 | 155 | kfree(port); |
2ad7bf36 MB |
156 | } |
157 | ||
2ad7bf36 | 158 | #define IPVLAN_FEATURES \ |
a188222b | 159 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
2ad7bf36 MB |
160 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ |
161 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ | |
162 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) | |
163 | ||
164 | #define IPVLAN_STATE_MASK \ | |
165 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
166 | ||
2ad7bf36 MB |
167 | static int ipvlan_init(struct net_device *dev) |
168 | { | |
169 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
170 | const struct net_device *phy_dev = ipvlan->phy_dev; | |
494e8489 | 171 | struct ipvl_port *port = ipvlan->port; |
2ad7bf36 MB |
172 | |
173 | dev->state = (dev->state & ~IPVLAN_STATE_MASK) | | |
174 | (phy_dev->state & IPVLAN_STATE_MASK); | |
175 | dev->features = phy_dev->features & IPVLAN_FEATURES; | |
176 | dev->features |= NETIF_F_LLTX; | |
177 | dev->gso_max_size = phy_dev->gso_max_size; | |
f6773c5e | 178 | dev->gso_max_segs = phy_dev->gso_max_segs; |
2ad7bf36 MB |
179 | dev->hard_header_len = phy_dev->hard_header_len; |
180 | ||
0d7dd798 | 181 | netdev_lockdep_set_classes(dev); |
2ad7bf36 MB |
182 | |
183 | ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats); | |
184 | if (!ipvlan->pcpu_stats) | |
185 | return -ENOMEM; | |
186 | ||
494e8489 MB |
187 | port->count += 1; |
188 | ||
2ad7bf36 MB |
189 | return 0; |
190 | } | |
191 | ||
192 | static void ipvlan_uninit(struct net_device *dev) | |
193 | { | |
194 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
195 | struct ipvl_port *port = ipvlan->port; | |
196 | ||
04901cea | 197 | free_percpu(ipvlan->pcpu_stats); |
2ad7bf36 MB |
198 | |
199 | port->count -= 1; | |
200 | if (!port->count) | |
201 | ipvlan_port_destroy(port->dev); | |
202 | } | |
203 | ||
204 | static int ipvlan_open(struct net_device *dev) | |
205 | { | |
206 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
207 | struct net_device *phy_dev = ipvlan->phy_dev; | |
208 | struct ipvl_addr *addr; | |
209 | ||
4fbae7d8 MB |
210 | if (ipvlan->port->mode == IPVLAN_MODE_L3 || |
211 | ipvlan->port->mode == IPVLAN_MODE_L3S) | |
2ad7bf36 MB |
212 | dev->flags |= IFF_NOARP; |
213 | else | |
214 | dev->flags &= ~IFF_NOARP; | |
215 | ||
515866f8 KK |
216 | list_for_each_entry(addr, &ipvlan->addrs, anode) |
217 | ipvlan_ht_addr_add(ipvlan, addr); | |
218 | ||
2ad7bf36 MB |
219 | return dev_uc_add(phy_dev, phy_dev->dev_addr); |
220 | } | |
221 | ||
222 | static int ipvlan_stop(struct net_device *dev) | |
223 | { | |
224 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
225 | struct net_device *phy_dev = ipvlan->phy_dev; | |
226 | struct ipvl_addr *addr; | |
227 | ||
228 | dev_uc_unsync(phy_dev, dev); | |
229 | dev_mc_unsync(phy_dev, dev); | |
230 | ||
231 | dev_uc_del(phy_dev, phy_dev->dev_addr); | |
232 | ||
515866f8 | 233 | list_for_each_entry(addr, &ipvlan->addrs, anode) |
6640e673 | 234 | ipvlan_ht_addr_del(addr); |
515866f8 | 235 | |
2ad7bf36 MB |
236 | return 0; |
237 | } | |
238 | ||
92c7b0de MB |
239 | static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb, |
240 | struct net_device *dev) | |
2ad7bf36 MB |
241 | { |
242 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
243 | int skblen = skb->len; | |
244 | int ret; | |
245 | ||
246 | ret = ipvlan_queue_xmit(skb, dev); | |
247 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { | |
248 | struct ipvl_pcpu_stats *pcptr; | |
249 | ||
250 | pcptr = this_cpu_ptr(ipvlan->pcpu_stats); | |
251 | ||
252 | u64_stats_update_begin(&pcptr->syncp); | |
253 | pcptr->tx_pkts++; | |
254 | pcptr->tx_bytes += skblen; | |
255 | u64_stats_update_end(&pcptr->syncp); | |
256 | } else { | |
257 | this_cpu_inc(ipvlan->pcpu_stats->tx_drps); | |
258 | } | |
259 | return ret; | |
260 | } | |
261 | ||
262 | static netdev_features_t ipvlan_fix_features(struct net_device *dev, | |
263 | netdev_features_t features) | |
264 | { | |
265 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
266 | ||
267 | return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES); | |
268 | } | |
269 | ||
270 | static void ipvlan_change_rx_flags(struct net_device *dev, int change) | |
271 | { | |
272 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
273 | struct net_device *phy_dev = ipvlan->phy_dev; | |
274 | ||
275 | if (change & IFF_ALLMULTI) | |
276 | dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1); | |
277 | } | |
278 | ||
2ad7bf36 MB |
279 | static void ipvlan_set_multicast_mac_filter(struct net_device *dev) |
280 | { | |
281 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
282 | ||
283 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { | |
284 | bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE); | |
285 | } else { | |
286 | struct netdev_hw_addr *ha; | |
287 | DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
288 | ||
289 | bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE); | |
290 | netdev_for_each_mc_addr(ha, dev) | |
291 | __set_bit(ipvlan_mac_hash(ha->addr), mc_filters); | |
292 | ||
f631c44b MB |
293 | /* Turn-on broadcast bit irrespective of address family, |
294 | * since broadcast is deferred to a work-queue, hence no | |
295 | * impact on fast-path processing. | |
296 | */ | |
297 | __set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters); | |
298 | ||
2ad7bf36 MB |
299 | bitmap_copy(ipvlan->mac_filters, mc_filters, |
300 | IPVLAN_MAC_FILTER_SIZE); | |
301 | } | |
302 | dev_uc_sync(ipvlan->phy_dev, dev); | |
303 | dev_mc_sync(ipvlan->phy_dev, dev); | |
304 | } | |
305 | ||
bc1f4470 | 306 | static void ipvlan_get_stats64(struct net_device *dev, |
307 | struct rtnl_link_stats64 *s) | |
2ad7bf36 MB |
308 | { |
309 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
310 | ||
311 | if (ipvlan->pcpu_stats) { | |
312 | struct ipvl_pcpu_stats *pcptr; | |
313 | u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes; | |
314 | u32 rx_errs = 0, tx_drps = 0; | |
315 | u32 strt; | |
316 | int idx; | |
317 | ||
318 | for_each_possible_cpu(idx) { | |
319 | pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx); | |
320 | do { | |
321 | strt= u64_stats_fetch_begin_irq(&pcptr->syncp); | |
322 | rx_pkts = pcptr->rx_pkts; | |
323 | rx_bytes = pcptr->rx_bytes; | |
324 | rx_mcast = pcptr->rx_mcast; | |
325 | tx_pkts = pcptr->tx_pkts; | |
326 | tx_bytes = pcptr->tx_bytes; | |
327 | } while (u64_stats_fetch_retry_irq(&pcptr->syncp, | |
328 | strt)); | |
329 | ||
330 | s->rx_packets += rx_pkts; | |
331 | s->rx_bytes += rx_bytes; | |
332 | s->multicast += rx_mcast; | |
333 | s->tx_packets += tx_pkts; | |
334 | s->tx_bytes += tx_bytes; | |
335 | ||
336 | /* u32 values are updated without syncp protection. */ | |
337 | rx_errs += pcptr->rx_errs; | |
338 | tx_drps += pcptr->tx_drps; | |
339 | } | |
340 | s->rx_errors = rx_errs; | |
341 | s->rx_dropped = rx_errs; | |
342 | s->tx_dropped = tx_drps; | |
343 | } | |
2ad7bf36 MB |
344 | } |
345 | ||
346 | static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) | |
347 | { | |
348 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
349 | struct net_device *phy_dev = ipvlan->phy_dev; | |
350 | ||
351 | return vlan_vid_add(phy_dev, proto, vid); | |
352 | } | |
353 | ||
354 | static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, | |
355 | u16 vid) | |
356 | { | |
357 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
358 | struct net_device *phy_dev = ipvlan->phy_dev; | |
359 | ||
360 | vlan_vid_del(phy_dev, proto, vid); | |
361 | return 0; | |
362 | } | |
363 | ||
7c411658 ND |
364 | static int ipvlan_get_iflink(const struct net_device *dev) |
365 | { | |
366 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
367 | ||
368 | return ipvlan->phy_dev->ifindex; | |
369 | } | |
370 | ||
2ad7bf36 MB |
371 | static const struct net_device_ops ipvlan_netdev_ops = { |
372 | .ndo_init = ipvlan_init, | |
373 | .ndo_uninit = ipvlan_uninit, | |
374 | .ndo_open = ipvlan_open, | |
375 | .ndo_stop = ipvlan_stop, | |
376 | .ndo_start_xmit = ipvlan_start_xmit, | |
377 | .ndo_fix_features = ipvlan_fix_features, | |
378 | .ndo_change_rx_flags = ipvlan_change_rx_flags, | |
379 | .ndo_set_rx_mode = ipvlan_set_multicast_mac_filter, | |
380 | .ndo_get_stats64 = ipvlan_get_stats64, | |
381 | .ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid, | |
382 | .ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid, | |
7c411658 | 383 | .ndo_get_iflink = ipvlan_get_iflink, |
2ad7bf36 MB |
384 | }; |
385 | ||
386 | static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
387 | unsigned short type, const void *daddr, | |
388 | const void *saddr, unsigned len) | |
389 | { | |
390 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
391 | struct net_device *phy_dev = ipvlan->phy_dev; | |
392 | ||
393 | /* TODO Probably use a different field than dev_addr so that the | |
394 | * mac-address on the virtual device is portable and can be carried | |
395 | * while the packets use the mac-addr on the physical device. | |
396 | */ | |
397 | return dev_hard_header(skb, phy_dev, type, daddr, | |
398 | saddr ? : dev->dev_addr, len); | |
399 | } | |
400 | ||
401 | static const struct header_ops ipvlan_header_ops = { | |
402 | .create = ipvlan_hard_header, | |
2ad7bf36 MB |
403 | .parse = eth_header_parse, |
404 | .cache = eth_header_cache, | |
405 | .cache_update = eth_header_cache_update, | |
406 | }; | |
407 | ||
314d10d7 DD |
408 | static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev, |
409 | struct ethtool_link_ksettings *cmd) | |
2ad7bf36 MB |
410 | { |
411 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
412 | ||
314d10d7 | 413 | return __ethtool_get_link_ksettings(ipvlan->phy_dev, cmd); |
2ad7bf36 MB |
414 | } |
415 | ||
416 | static void ipvlan_ethtool_get_drvinfo(struct net_device *dev, | |
417 | struct ethtool_drvinfo *drvinfo) | |
418 | { | |
419 | strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver)); | |
420 | strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version)); | |
421 | } | |
422 | ||
423 | static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev) | |
424 | { | |
425 | const struct ipvl_dev *ipvlan = netdev_priv(dev); | |
426 | ||
427 | return ipvlan->msg_enable; | |
428 | } | |
429 | ||
430 | static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value) | |
431 | { | |
432 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
433 | ||
434 | ipvlan->msg_enable = value; | |
435 | } | |
436 | ||
437 | static const struct ethtool_ops ipvlan_ethtool_ops = { | |
438 | .get_link = ethtool_op_get_link, | |
314d10d7 | 439 | .get_link_ksettings = ipvlan_ethtool_get_link_ksettings, |
2ad7bf36 MB |
440 | .get_drvinfo = ipvlan_ethtool_get_drvinfo, |
441 | .get_msglevel = ipvlan_ethtool_get_msglevel, | |
442 | .set_msglevel = ipvlan_ethtool_set_msglevel, | |
443 | }; | |
444 | ||
445 | static int ipvlan_nl_changelink(struct net_device *dev, | |
446 | struct nlattr *tb[], struct nlattr *data[]) | |
447 | { | |
448 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
449 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
4fbae7d8 | 450 | int err = 0; |
2ad7bf36 MB |
451 | |
452 | if (data && data[IFLA_IPVLAN_MODE]) { | |
453 | u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
454 | ||
4fbae7d8 | 455 | err = ipvlan_set_port_mode(port, nmode); |
2ad7bf36 | 456 | } |
4fbae7d8 | 457 | return err; |
2ad7bf36 MB |
458 | } |
459 | ||
460 | static size_t ipvlan_nl_getsize(const struct net_device *dev) | |
461 | { | |
462 | return (0 | |
463 | + nla_total_size(2) /* IFLA_IPVLAN_MODE */ | |
464 | ); | |
465 | } | |
466 | ||
467 | static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[]) | |
468 | { | |
469 | if (data && data[IFLA_IPVLAN_MODE]) { | |
470 | u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); | |
471 | ||
472 | if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX) | |
473 | return -EINVAL; | |
474 | } | |
475 | return 0; | |
476 | } | |
477 | ||
478 | static int ipvlan_nl_fillinfo(struct sk_buff *skb, | |
479 | const struct net_device *dev) | |
480 | { | |
481 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
482 | struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); | |
483 | int ret = -EINVAL; | |
484 | ||
485 | if (!port) | |
486 | goto err; | |
487 | ||
488 | ret = -EMSGSIZE; | |
489 | if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) | |
490 | goto err; | |
491 | ||
492 | return 0; | |
493 | ||
494 | err: | |
495 | return ret; | |
496 | } | |
497 | ||
498 | static int ipvlan_link_new(struct net *src_net, struct net_device *dev, | |
499 | struct nlattr *tb[], struct nlattr *data[]) | |
500 | { | |
501 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
502 | struct ipvl_port *port; | |
503 | struct net_device *phy_dev; | |
504 | int err; | |
e93fbc5a | 505 | u16 mode = IPVLAN_MODE_L3; |
147fd287 | 506 | bool create = false; |
2ad7bf36 MB |
507 | |
508 | if (!tb[IFLA_LINK]) | |
509 | return -EINVAL; | |
510 | ||
511 | phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); | |
512 | if (!phy_dev) | |
513 | return -ENODEV; | |
514 | ||
5933fea7 | 515 | if (netif_is_ipvlan(phy_dev)) { |
2ad7bf36 MB |
516 | struct ipvl_dev *tmp = netdev_priv(phy_dev); |
517 | ||
518 | phy_dev = tmp->phy_dev; | |
5933fea7 | 519 | } else if (!netif_is_ipvlan_port(phy_dev)) { |
2ad7bf36 MB |
520 | err = ipvlan_port_create(phy_dev); |
521 | if (err < 0) | |
522 | return err; | |
147fd287 | 523 | create = true; |
2ad7bf36 MB |
524 | } |
525 | ||
2ad7bf36 | 526 | if (data && data[IFLA_IPVLAN_MODE]) |
e93fbc5a | 527 | mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
2ad7bf36 | 528 | |
e93fbc5a | 529 | port = ipvlan_port_get_rtnl(phy_dev); |
2ad7bf36 MB |
530 | ipvlan->phy_dev = phy_dev; |
531 | ipvlan->dev = dev; | |
532 | ipvlan->port = port; | |
533 | ipvlan->sfeatures = IPVLAN_FEATURES; | |
296d4856 | 534 | ipvlan_adjust_mtu(ipvlan, phy_dev); |
2ad7bf36 | 535 | INIT_LIST_HEAD(&ipvlan->addrs); |
2ad7bf36 | 536 | |
009146d1 MB |
537 | /* Since L2 address is shared among all IPvlan slaves including |
538 | * master, use unique 16 bit dev-ids to diffentiate among them. | |
539 | * Assign IDs between 0x1 and 0xFFFE (used by the master) to each | |
540 | * slave link [see addrconf_ifid_eui48()]. | |
541 | */ | |
542 | err = ida_simple_get(&port->ida, 1, 0xFFFE, GFP_KERNEL); | |
543 | if (err < 0) | |
544 | goto destroy_ipvlan_port; | |
545 | dev->dev_id = err; | |
546 | ||
2ad7bf36 MB |
547 | /* TODO Probably put random address here to be presented to the |
548 | * world but keep using the physical-dev address for the outgoing | |
549 | * packets. | |
550 | */ | |
551 | memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN); | |
552 | ||
553 | dev->priv_flags |= IFF_IPVLAN_SLAVE; | |
554 | ||
2ad7bf36 MB |
555 | err = register_netdevice(dev); |
556 | if (err < 0) | |
009146d1 | 557 | goto remove_ida; |
2ad7bf36 MB |
558 | |
559 | err = netdev_upper_dev_link(phy_dev, dev); | |
494e8489 | 560 | if (err) { |
147fd287 | 561 | goto unregister_netdev; |
494e8489 | 562 | } |
4fbae7d8 MB |
563 | err = ipvlan_set_port_mode(port, mode); |
564 | if (err) { | |
1a31cc86 | 565 | goto unlink_netdev; |
4fbae7d8 | 566 | } |
2ad7bf36 MB |
567 | |
568 | list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); | |
569 | netif_stacked_transfer_operstate(phy_dev, dev); | |
570 | return 0; | |
147fd287 | 571 | |
1a31cc86 GF |
572 | unlink_netdev: |
573 | netdev_upper_dev_unlink(phy_dev, dev); | |
147fd287 GF |
574 | unregister_netdev: |
575 | unregister_netdevice(dev); | |
009146d1 MB |
576 | remove_ida: |
577 | ida_simple_remove(&port->ida, dev->dev_id); | |
147fd287 GF |
578 | destroy_ipvlan_port: |
579 | if (create) | |
580 | ipvlan_port_destroy(phy_dev); | |
581 | return err; | |
2ad7bf36 MB |
582 | } |
583 | ||
584 | static void ipvlan_link_delete(struct net_device *dev, struct list_head *head) | |
585 | { | |
586 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
587 | struct ipvl_addr *addr, *next; | |
588 | ||
515866f8 | 589 | list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { |
6640e673 | 590 | ipvlan_ht_addr_del(addr); |
515866f8 | 591 | list_del(&addr->anode); |
6a725497 | 592 | kfree_rcu(addr, rcu); |
2ad7bf36 | 593 | } |
515866f8 | 594 | |
009146d1 | 595 | ida_simple_remove(&ipvlan->port->ida, dev->dev_id); |
2ad7bf36 MB |
596 | list_del_rcu(&ipvlan->pnode); |
597 | unregister_netdevice_queue(dev, head); | |
598 | netdev_upper_dev_unlink(ipvlan->phy_dev, dev); | |
599 | } | |
600 | ||
601 | static void ipvlan_link_setup(struct net_device *dev) | |
602 | { | |
603 | ether_setup(dev); | |
604 | ||
605 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); | |
bf485bcf | 606 | dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE; |
2ad7bf36 MB |
607 | dev->netdev_ops = &ipvlan_netdev_ops; |
608 | dev->destructor = free_netdev; | |
609 | dev->header_ops = &ipvlan_header_ops; | |
610 | dev->ethtool_ops = &ipvlan_ethtool_ops; | |
2ad7bf36 MB |
611 | } |
612 | ||
613 | static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = | |
614 | { | |
615 | [IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, | |
616 | }; | |
617 | ||
618 | static struct rtnl_link_ops ipvlan_link_ops = { | |
619 | .kind = "ipvlan", | |
620 | .priv_size = sizeof(struct ipvl_dev), | |
621 | ||
622 | .get_size = ipvlan_nl_getsize, | |
623 | .policy = ipvlan_nl_policy, | |
624 | .validate = ipvlan_nl_validate, | |
625 | .fill_info = ipvlan_nl_fillinfo, | |
626 | .changelink = ipvlan_nl_changelink, | |
627 | .maxtype = IFLA_IPVLAN_MAX, | |
628 | ||
629 | .setup = ipvlan_link_setup, | |
630 | .newlink = ipvlan_link_new, | |
631 | .dellink = ipvlan_link_delete, | |
632 | }; | |
633 | ||
92c7b0de | 634 | static int ipvlan_link_register(struct rtnl_link_ops *ops) |
2ad7bf36 MB |
635 | { |
636 | return rtnl_link_register(ops); | |
637 | } | |
638 | ||
639 | static int ipvlan_device_event(struct notifier_block *unused, | |
640 | unsigned long event, void *ptr) | |
641 | { | |
642 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
643 | struct ipvl_dev *ipvlan, *next; | |
644 | struct ipvl_port *port; | |
645 | LIST_HEAD(lst_kill); | |
646 | ||
5933fea7 | 647 | if (!netif_is_ipvlan_port(dev)) |
2ad7bf36 MB |
648 | return NOTIFY_DONE; |
649 | ||
650 | port = ipvlan_port_get_rtnl(dev); | |
651 | ||
652 | switch (event) { | |
653 | case NETDEV_CHANGE: | |
654 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
655 | netif_stacked_transfer_operstate(ipvlan->phy_dev, | |
656 | ipvlan->dev); | |
657 | break; | |
658 | ||
659 | case NETDEV_UNREGISTER: | |
660 | if (dev->reg_state != NETREG_UNREGISTERING) | |
661 | break; | |
662 | ||
663 | list_for_each_entry_safe(ipvlan, next, &port->ipvlans, | |
664 | pnode) | |
665 | ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev, | |
666 | &lst_kill); | |
667 | unregister_netdevice_many(&lst_kill); | |
668 | break; | |
669 | ||
670 | case NETDEV_FEAT_CHANGE: | |
671 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) { | |
672 | ipvlan->dev->features = dev->features & IPVLAN_FEATURES; | |
673 | ipvlan->dev->gso_max_size = dev->gso_max_size; | |
f6773c5e | 674 | ipvlan->dev->gso_max_segs = dev->gso_max_segs; |
2ad7bf36 MB |
675 | netdev_features_change(ipvlan->dev); |
676 | } | |
677 | break; | |
678 | ||
679 | case NETDEV_CHANGEMTU: | |
680 | list_for_each_entry(ipvlan, &port->ipvlans, pnode) | |
681 | ipvlan_adjust_mtu(ipvlan, dev); | |
682 | break; | |
683 | ||
684 | case NETDEV_PRE_TYPE_CHANGE: | |
685 | /* Forbid underlying device to change its type. */ | |
686 | return NOTIFY_BAD; | |
687 | } | |
688 | return NOTIFY_DONE; | |
689 | } | |
690 | ||
86673982 | 691 | static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
692 | { |
693 | struct ipvl_addr *addr; | |
694 | ||
2ad7bf36 MB |
695 | addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); |
696 | if (!addr) | |
697 | return -ENOMEM; | |
698 | ||
699 | addr->master = ipvlan; | |
86673982 GF |
700 | if (is_v6) { |
701 | memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr)); | |
702 | addr->atype = IPVL_IPV6; | |
703 | } else { | |
704 | memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr)); | |
705 | addr->atype = IPVL_IPV4; | |
706 | } | |
40891e8a | 707 | list_add_tail(&addr->anode, &ipvlan->addrs); |
515866f8 | 708 | |
27705f70 JB |
709 | /* If the interface is not up, the address will be added to the hash |
710 | * list by ipvlan_open. | |
711 | */ | |
712 | if (netif_running(ipvlan->dev)) | |
713 | ipvlan_ht_addr_add(ipvlan, addr); | |
2ad7bf36 MB |
714 | |
715 | return 0; | |
716 | } | |
717 | ||
86673982 | 718 | static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
2ad7bf36 MB |
719 | { |
720 | struct ipvl_addr *addr; | |
721 | ||
86673982 | 722 | addr = ipvlan_find_addr(ipvlan, iaddr, is_v6); |
2ad7bf36 MB |
723 | if (!addr) |
724 | return; | |
725 | ||
6640e673 | 726 | ipvlan_ht_addr_del(addr); |
40891e8a | 727 | list_del(&addr->anode); |
2ad7bf36 MB |
728 | kfree_rcu(addr, rcu); |
729 | ||
730 | return; | |
731 | } | |
732 | ||
86673982 GF |
733 | static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) |
734 | { | |
735 | if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) { | |
736 | netif_err(ipvlan, ifup, ipvlan->dev, | |
737 | "Failed to add IPv6=%pI6c addr for %s intf\n", | |
738 | ip6_addr, ipvlan->dev->name); | |
739 | return -EINVAL; | |
740 | } | |
741 | ||
742 | return ipvlan_add_addr(ipvlan, ip6_addr, true); | |
743 | } | |
744 | ||
745 | static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) | |
746 | { | |
747 | return ipvlan_del_addr(ipvlan, ip6_addr, true); | |
748 | } | |
749 | ||
2ad7bf36 MB |
750 | static int ipvlan_addr6_event(struct notifier_block *unused, |
751 | unsigned long event, void *ptr) | |
752 | { | |
753 | struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr; | |
754 | struct net_device *dev = (struct net_device *)if6->idev->dev; | |
755 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
756 | ||
23a5a49c KK |
757 | /* FIXME IPv6 autoconf calls us from bh without RTNL */ |
758 | if (in_softirq()) | |
759 | return NOTIFY_DONE; | |
760 | ||
5933fea7 | 761 | if (!netif_is_ipvlan(dev)) |
2ad7bf36 MB |
762 | return NOTIFY_DONE; |
763 | ||
764 | if (!ipvlan || !ipvlan->port) | |
765 | return NOTIFY_DONE; | |
766 | ||
767 | switch (event) { | |
768 | case NETDEV_UP: | |
769 | if (ipvlan_add_addr6(ipvlan, &if6->addr)) | |
770 | return NOTIFY_BAD; | |
771 | break; | |
772 | ||
773 | case NETDEV_DOWN: | |
774 | ipvlan_del_addr6(ipvlan, &if6->addr); | |
775 | break; | |
776 | } | |
777 | ||
778 | return NOTIFY_OK; | |
779 | } | |
780 | ||
781 | static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
782 | { | |
e9997c29 | 783 | if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) { |
2ad7bf36 MB |
784 | netif_err(ipvlan, ifup, ipvlan->dev, |
785 | "Failed to add IPv4=%pI4 on %s intf.\n", | |
786 | ip4_addr, ipvlan->dev->name); | |
787 | return -EINVAL; | |
788 | } | |
2ad7bf36 | 789 | |
86673982 | 790 | return ipvlan_add_addr(ipvlan, ip4_addr, false); |
2ad7bf36 MB |
791 | } |
792 | ||
793 | static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) | |
794 | { | |
86673982 | 795 | return ipvlan_del_addr(ipvlan, ip4_addr, false); |
2ad7bf36 MB |
796 | } |
797 | ||
798 | static int ipvlan_addr4_event(struct notifier_block *unused, | |
799 | unsigned long event, void *ptr) | |
800 | { | |
801 | struct in_ifaddr *if4 = (struct in_ifaddr *)ptr; | |
802 | struct net_device *dev = (struct net_device *)if4->ifa_dev->dev; | |
803 | struct ipvl_dev *ipvlan = netdev_priv(dev); | |
804 | struct in_addr ip4_addr; | |
805 | ||
5933fea7 | 806 | if (!netif_is_ipvlan(dev)) |
2ad7bf36 MB |
807 | return NOTIFY_DONE; |
808 | ||
809 | if (!ipvlan || !ipvlan->port) | |
810 | return NOTIFY_DONE; | |
811 | ||
812 | switch (event) { | |
813 | case NETDEV_UP: | |
814 | ip4_addr.s_addr = if4->ifa_address; | |
815 | if (ipvlan_add_addr4(ipvlan, &ip4_addr)) | |
816 | return NOTIFY_BAD; | |
817 | break; | |
818 | ||
819 | case NETDEV_DOWN: | |
820 | ip4_addr.s_addr = if4->ifa_address; | |
821 | ipvlan_del_addr4(ipvlan, &ip4_addr); | |
822 | break; | |
823 | } | |
824 | ||
825 | return NOTIFY_OK; | |
826 | } | |
827 | ||
828 | static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { | |
829 | .notifier_call = ipvlan_addr4_event, | |
830 | }; | |
831 | ||
832 | static struct notifier_block ipvlan_notifier_block __read_mostly = { | |
833 | .notifier_call = ipvlan_device_event, | |
834 | }; | |
835 | ||
836 | static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { | |
837 | .notifier_call = ipvlan_addr6_event, | |
838 | }; | |
839 | ||
840 | static int __init ipvlan_init_module(void) | |
841 | { | |
842 | int err; | |
843 | ||
844 | ipvlan_init_secret(); | |
845 | register_netdevice_notifier(&ipvlan_notifier_block); | |
846 | register_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
847 | register_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
848 | ||
849 | err = ipvlan_link_register(&ipvlan_link_ops); | |
850 | if (err < 0) | |
851 | goto error; | |
852 | ||
853 | return 0; | |
854 | error: | |
855 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
856 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
857 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
858 | return err; | |
859 | } | |
860 | ||
861 | static void __exit ipvlan_cleanup_module(void) | |
862 | { | |
863 | rtnl_link_unregister(&ipvlan_link_ops); | |
864 | unregister_netdevice_notifier(&ipvlan_notifier_block); | |
865 | unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); | |
866 | unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); | |
867 | } | |
868 | ||
869 | module_init(ipvlan_init_module); | |
870 | module_exit(ipvlan_cleanup_module); | |
871 | ||
872 | MODULE_LICENSE("GPL"); | |
873 | MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>"); | |
874 | MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); | |
875 | MODULE_ALIAS_RTNL_LINK("ipvlan"); |