Commit | Line | Data |
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b863ceb7 PM |
1 | /* |
2 | * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License as | |
6 | * published by the Free Software Foundation; either version 2 of | |
7 | * the License, or (at your option) any later version. | |
8 | * | |
9 | * The code this is based on carried the following copyright notice: | |
10 | * --- | |
11 | * (C) Copyright 2001-2006 | |
12 | * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com | |
13 | * Re-worked by Ben Greear <greearb@candelatech.com> | |
14 | * --- | |
15 | */ | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/string.h> | |
82524746 | 23 | #include <linux/rculist.h> |
b863ceb7 PM |
24 | #include <linux/notifier.h> |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/ethtool.h> | |
28 | #include <linux/if_arp.h> | |
29 | #include <linux/if_link.h> | |
30 | #include <linux/if_macvlan.h> | |
31 | #include <net/rtnetlink.h> | |
618e1b74 | 32 | #include <net/xfrm.h> |
b863ceb7 PM |
33 | |
34 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) | |
35 | ||
36 | struct macvlan_port { | |
37 | struct net_device *dev; | |
38 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
39 | struct list_head vlans; | |
40 | }; | |
41 | ||
b863ceb7 PM |
42 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
43 | const unsigned char *addr) | |
44 | { | |
45 | struct macvlan_dev *vlan; | |
46 | struct hlist_node *n; | |
47 | ||
48 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { | |
ac06713d | 49 | if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
50 | return vlan; |
51 | } | |
52 | return NULL; | |
53 | } | |
54 | ||
f9ac30f0 EB |
55 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
56 | { | |
57 | struct macvlan_port *port = vlan->port; | |
58 | const unsigned char *addr = vlan->dev->dev_addr; | |
59 | ||
60 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
61 | } | |
62 | ||
63 | static void macvlan_hash_del(struct macvlan_dev *vlan) | |
64 | { | |
65 | hlist_del_rcu(&vlan->hlist); | |
66 | synchronize_rcu(); | |
67 | } | |
68 | ||
69 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
70 | const unsigned char *addr) | |
71 | { | |
72 | macvlan_hash_del(vlan); | |
73 | /* Now that we are unhashed it is safe to change the device | |
74 | * address without confusing packet delivery. | |
75 | */ | |
76 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
77 | macvlan_hash_add(vlan); | |
78 | } | |
79 | ||
80 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
81 | const unsigned char *addr) | |
82 | { | |
83 | /* Test to see if the specified multicast address is | |
84 | * currently in use by the underlying device or | |
85 | * another macvlan. | |
86 | */ | |
ac06713d | 87 | if (!compare_ether_addr_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
88 | return 1; |
89 | ||
90 | if (macvlan_hash_lookup(port, addr)) | |
91 | return 1; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
a1e514c5 | 96 | |
fc0663d6 AB |
97 | static int macvlan_broadcast_one(struct sk_buff *skb, |
98 | const struct macvlan_dev *vlan, | |
618e1b74 | 99 | const struct ethhdr *eth, bool local) |
a1e514c5 | 100 | { |
fc0663d6 | 101 | struct net_device *dev = vlan->dev; |
a1e514c5 AB |
102 | if (!skb) |
103 | return NET_RX_DROP; | |
104 | ||
618e1b74 | 105 | if (local) |
fc0663d6 | 106 | return vlan->forward(dev, skb); |
618e1b74 | 107 | |
a1e514c5 AB |
108 | skb->dev = dev; |
109 | if (!compare_ether_addr_64bits(eth->h_dest, | |
110 | dev->broadcast)) | |
111 | skb->pkt_type = PACKET_BROADCAST; | |
112 | else | |
113 | skb->pkt_type = PACKET_MULTICAST; | |
114 | ||
fc0663d6 | 115 | return vlan->receive(skb); |
a1e514c5 AB |
116 | } |
117 | ||
b863ceb7 | 118 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
119 | const struct macvlan_port *port, |
120 | struct net_device *src, | |
121 | enum macvlan_mode mode) | |
b863ceb7 PM |
122 | { |
123 | const struct ethhdr *eth = eth_hdr(skb); | |
124 | const struct macvlan_dev *vlan; | |
125 | struct hlist_node *n; | |
b863ceb7 PM |
126 | struct sk_buff *nskb; |
127 | unsigned int i; | |
a1e514c5 | 128 | int err; |
b863ceb7 | 129 | |
efbbced3 PM |
130 | if (skb->protocol == htons(ETH_P_PAUSE)) |
131 | return; | |
132 | ||
b863ceb7 PM |
133 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
134 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { | |
618e1b74 AB |
135 | if (vlan->dev == src || !(vlan->mode & mode)) |
136 | continue; | |
137 | ||
b863ceb7 | 138 | nskb = skb_clone(skb, GFP_ATOMIC); |
fc0663d6 | 139 | err = macvlan_broadcast_one(nskb, vlan, eth, |
618e1b74 | 140 | mode == MACVLAN_MODE_BRIDGE); |
a1e514c5 AB |
141 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
142 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
143 | } |
144 | } | |
145 | } | |
146 | ||
147 | /* called under rcu_read_lock() from netif_receive_skb */ | |
148 | static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb) | |
149 | { | |
150 | const struct ethhdr *eth = eth_hdr(skb); | |
151 | const struct macvlan_port *port; | |
152 | const struct macvlan_dev *vlan; | |
618e1b74 | 153 | const struct macvlan_dev *src; |
b863ceb7 | 154 | struct net_device *dev; |
a1e514c5 | 155 | unsigned int len; |
b863ceb7 PM |
156 | |
157 | port = rcu_dereference(skb->dev->macvlan_port); | |
158 | if (port == NULL) | |
159 | return skb; | |
160 | ||
161 | if (is_multicast_ether_addr(eth->h_dest)) { | |
618e1b74 AB |
162 | src = macvlan_hash_lookup(port, eth->h_source); |
163 | if (!src) | |
164 | /* frame comes from an external address */ | |
165 | macvlan_broadcast(skb, port, NULL, | |
166 | MACVLAN_MODE_PRIVATE | | |
167 | MACVLAN_MODE_VEPA | | |
168 | MACVLAN_MODE_BRIDGE); | |
169 | else if (src->mode == MACVLAN_MODE_VEPA) | |
170 | /* flood to everyone except source */ | |
171 | macvlan_broadcast(skb, port, src->dev, | |
172 | MACVLAN_MODE_VEPA | | |
173 | MACVLAN_MODE_BRIDGE); | |
174 | else if (src->mode == MACVLAN_MODE_BRIDGE) | |
175 | /* | |
176 | * flood only to VEPA ports, bridge ports | |
177 | * already saw the frame on the way out. | |
178 | */ | |
179 | macvlan_broadcast(skb, port, src->dev, | |
180 | MACVLAN_MODE_VEPA); | |
b863ceb7 PM |
181 | return skb; |
182 | } | |
183 | ||
184 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
185 | if (vlan == NULL) | |
186 | return skb; | |
187 | ||
188 | dev = vlan->dev; | |
189 | if (unlikely(!(dev->flags & IFF_UP))) { | |
190 | kfree_skb(skb); | |
191 | return NULL; | |
192 | } | |
a1e514c5 | 193 | len = skb->len + ETH_HLEN; |
b863ceb7 | 194 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 AB |
195 | macvlan_count_rx(vlan, len, skb != NULL, 0); |
196 | if (!skb) | |
b863ceb7 | 197 | return NULL; |
b863ceb7 PM |
198 | |
199 | skb->dev = dev; | |
200 | skb->pkt_type = PACKET_HOST; | |
201 | ||
fc0663d6 | 202 | vlan->receive(skb); |
b863ceb7 PM |
203 | return NULL; |
204 | } | |
205 | ||
618e1b74 AB |
206 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
207 | { | |
208 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
209 | const struct macvlan_port *port = vlan->port; | |
210 | const struct macvlan_dev *dest; | |
211 | ||
212 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
213 | const struct ethhdr *eth = (void *)skb->data; | |
214 | ||
215 | /* send to other bridge ports directly */ | |
216 | if (is_multicast_ether_addr(eth->h_dest)) { | |
217 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
218 | goto xmit_world; | |
219 | } | |
220 | ||
221 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
222 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
223 | unsigned int length = skb->len + ETH_HLEN; | |
fc0663d6 | 224 | int ret = dest->forward(dest->dev, skb); |
618e1b74 AB |
225 | macvlan_count_rx(dest, length, |
226 | ret == NET_RX_SUCCESS, 0); | |
227 | ||
228 | return NET_XMIT_SUCCESS; | |
229 | } | |
230 | } | |
231 | ||
232 | xmit_world: | |
8a83a00b | 233 | skb_set_dev(skb, vlan->lowerdev); |
618e1b74 AB |
234 | return dev_queue_xmit(skb); |
235 | } | |
236 | ||
fc0663d6 AB |
237 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
238 | struct net_device *dev) | |
b863ceb7 | 239 | { |
2c114553 ED |
240 | int i = skb_get_queue_mapping(skb); |
241 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
b863ceb7 PM |
242 | unsigned int len = skb->len; |
243 | int ret; | |
244 | ||
618e1b74 | 245 | ret = macvlan_queue_xmit(skb, dev); |
b863ceb7 | 246 | if (likely(ret == NET_XMIT_SUCCESS)) { |
2c114553 ED |
247 | txq->tx_packets++; |
248 | txq->tx_bytes += len; | |
249 | } else | |
250 | txq->tx_dropped++; | |
251 | ||
cbbef5e1 | 252 | return ret; |
b863ceb7 | 253 | } |
fc0663d6 | 254 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
255 | |
256 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
257 | unsigned short type, const void *daddr, |
258 | const void *saddr, unsigned len) | |
b863ceb7 PM |
259 | { |
260 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
261 | struct net_device *lowerdev = vlan->lowerdev; | |
262 | ||
0c4e8581 SH |
263 | return dev_hard_header(skb, lowerdev, type, daddr, |
264 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
265 | } |
266 | ||
3b04ddde SH |
267 | static const struct header_ops macvlan_hard_header_ops = { |
268 | .create = macvlan_hard_header, | |
269 | .rebuild = eth_rebuild_header, | |
270 | .parse = eth_header_parse, | |
3b04ddde SH |
271 | .cache = eth_header_cache, |
272 | .cache_update = eth_header_cache_update, | |
273 | }; | |
274 | ||
b863ceb7 PM |
275 | static int macvlan_open(struct net_device *dev) |
276 | { | |
277 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
278 | struct net_device *lowerdev = vlan->lowerdev; |
279 | int err; | |
280 | ||
f9ac30f0 EB |
281 | err = -EBUSY; |
282 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
283 | goto out; | |
284 | ||
ccffad25 | 285 | err = dev_unicast_add(lowerdev, dev->dev_addr); |
b863ceb7 | 286 | if (err < 0) |
b89fb7da WC |
287 | goto out; |
288 | if (dev->flags & IFF_ALLMULTI) { | |
289 | err = dev_set_allmulti(lowerdev, 1); | |
290 | if (err < 0) | |
291 | goto del_unicast; | |
292 | } | |
f9ac30f0 | 293 | macvlan_hash_add(vlan); |
b863ceb7 | 294 | return 0; |
b89fb7da WC |
295 | |
296 | del_unicast: | |
ccffad25 | 297 | dev_unicast_delete(lowerdev, dev->dev_addr); |
b89fb7da WC |
298 | out: |
299 | return err; | |
b863ceb7 PM |
300 | } |
301 | ||
302 | static int macvlan_stop(struct net_device *dev) | |
303 | { | |
304 | struct macvlan_dev *vlan = netdev_priv(dev); | |
305 | struct net_device *lowerdev = vlan->lowerdev; | |
306 | ||
307 | dev_mc_unsync(lowerdev, dev); | |
308 | if (dev->flags & IFF_ALLMULTI) | |
309 | dev_set_allmulti(lowerdev, -1); | |
310 | ||
ccffad25 | 311 | dev_unicast_delete(lowerdev, dev->dev_addr); |
b863ceb7 | 312 | |
f9ac30f0 | 313 | macvlan_hash_del(vlan); |
b863ceb7 PM |
314 | return 0; |
315 | } | |
316 | ||
ad5d20a6 PM |
317 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
318 | { | |
319 | struct macvlan_dev *vlan = netdev_priv(dev); | |
320 | struct net_device *lowerdev = vlan->lowerdev; | |
321 | struct sockaddr *addr = p; | |
322 | int err; | |
323 | ||
324 | if (!is_valid_ether_addr(addr->sa_data)) | |
325 | return -EADDRNOTAVAIL; | |
326 | ||
f9ac30f0 EB |
327 | if (!(dev->flags & IFF_UP)) { |
328 | /* Just copy in the new address */ | |
329 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
330 | } else { | |
331 | /* Rehash and update the device filters */ | |
332 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
333 | return -EBUSY; | |
ad5d20a6 | 334 | |
ccffad25 JP |
335 | err = dev_unicast_add(lowerdev, addr->sa_data); |
336 | if (err) | |
f9ac30f0 | 337 | return err; |
ad5d20a6 | 338 | |
ccffad25 | 339 | dev_unicast_delete(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
340 | |
341 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
342 | } | |
ad5d20a6 PM |
343 | return 0; |
344 | } | |
345 | ||
b863ceb7 PM |
346 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
347 | { | |
348 | struct macvlan_dev *vlan = netdev_priv(dev); | |
349 | struct net_device *lowerdev = vlan->lowerdev; | |
350 | ||
351 | if (change & IFF_ALLMULTI) | |
352 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
353 | } | |
354 | ||
355 | static void macvlan_set_multicast_list(struct net_device *dev) | |
356 | { | |
357 | struct macvlan_dev *vlan = netdev_priv(dev); | |
358 | ||
359 | dev_mc_sync(vlan->lowerdev, dev); | |
360 | } | |
361 | ||
362 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
363 | { | |
364 | struct macvlan_dev *vlan = netdev_priv(dev); | |
365 | ||
366 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
367 | return -EINVAL; | |
368 | dev->mtu = new_mtu; | |
369 | return 0; | |
370 | } | |
371 | ||
372 | /* | |
373 | * macvlan network devices have devices nesting below it and are a special | |
374 | * "super class" of normal network devices; split their locks off into a | |
375 | * separate class since they always nest. | |
376 | */ | |
377 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 378 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
379 | |
380 | #define MACVLAN_FEATURES \ | |
381 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
382 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
6eb3a855 | 383 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO) |
b863ceb7 PM |
384 | |
385 | #define MACVLAN_STATE_MASK \ | |
386 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
387 | ||
e8a0464c DM |
388 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
389 | struct netdev_queue *txq, | |
390 | void *_unused) | |
c773e847 DM |
391 | { |
392 | lockdep_set_class(&txq->_xmit_lock, | |
393 | &macvlan_netdev_xmit_lock_key); | |
394 | } | |
395 | ||
396 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
397 | { | |
cf508b12 DM |
398 | lockdep_set_class(&dev->addr_list_lock, |
399 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 400 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
401 | } |
402 | ||
b863ceb7 PM |
403 | static int macvlan_init(struct net_device *dev) |
404 | { | |
405 | struct macvlan_dev *vlan = netdev_priv(dev); | |
406 | const struct net_device *lowerdev = vlan->lowerdev; | |
407 | ||
408 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
409 | (lowerdev->state & MACVLAN_STATE_MASK); | |
410 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8c2acc53 | 411 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 412 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 413 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 414 | |
c773e847 DM |
415 | macvlan_set_lockdep_class(dev); |
416 | ||
fccaf710 ED |
417 | vlan->rx_stats = alloc_percpu(struct macvlan_rx_stats); |
418 | if (!vlan->rx_stats) | |
419 | return -ENOMEM; | |
420 | ||
b863ceb7 PM |
421 | return 0; |
422 | } | |
423 | ||
fccaf710 ED |
424 | static void macvlan_uninit(struct net_device *dev) |
425 | { | |
426 | struct macvlan_dev *vlan = netdev_priv(dev); | |
427 | ||
428 | free_percpu(vlan->rx_stats); | |
429 | } | |
430 | ||
431 | static struct net_device_stats *macvlan_dev_get_stats(struct net_device *dev) | |
432 | { | |
433 | struct net_device_stats *stats = &dev->stats; | |
434 | struct macvlan_dev *vlan = netdev_priv(dev); | |
435 | ||
436 | dev_txq_stats_fold(dev, stats); | |
437 | ||
438 | if (vlan->rx_stats) { | |
439 | struct macvlan_rx_stats *p, rx = {0}; | |
440 | int i; | |
441 | ||
442 | for_each_possible_cpu(i) { | |
443 | p = per_cpu_ptr(vlan->rx_stats, i); | |
444 | rx.rx_packets += p->rx_packets; | |
445 | rx.rx_bytes += p->rx_bytes; | |
446 | rx.rx_errors += p->rx_errors; | |
447 | rx.multicast += p->multicast; | |
448 | } | |
449 | stats->rx_packets = rx.rx_packets; | |
450 | stats->rx_bytes = rx.rx_bytes; | |
451 | stats->rx_errors = rx.rx_errors; | |
452 | stats->rx_dropped = rx.rx_errors; | |
453 | stats->multicast = rx.multicast; | |
454 | } | |
455 | return stats; | |
456 | } | |
457 | ||
b863ceb7 PM |
458 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
459 | struct ethtool_drvinfo *drvinfo) | |
460 | { | |
461 | snprintf(drvinfo->driver, 32, "macvlan"); | |
462 | snprintf(drvinfo->version, 32, "0.1"); | |
463 | } | |
464 | ||
465 | static u32 macvlan_ethtool_get_rx_csum(struct net_device *dev) | |
466 | { | |
467 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 468 | return dev_ethtool_get_rx_csum(vlan->lowerdev); |
b863ceb7 PM |
469 | } |
470 | ||
9edb8bb6 SH |
471 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
472 | struct ethtool_cmd *cmd) | |
473 | { | |
474 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 475 | return dev_ethtool_get_settings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
476 | } |
477 | ||
478 | static u32 macvlan_ethtool_get_flags(struct net_device *dev) | |
479 | { | |
480 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 481 | return dev_ethtool_get_flags(vlan->lowerdev); |
9edb8bb6 SH |
482 | } |
483 | ||
b863ceb7 PM |
484 | static const struct ethtool_ops macvlan_ethtool_ops = { |
485 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 486 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 | 487 | .get_rx_csum = macvlan_ethtool_get_rx_csum, |
b863ceb7 | 488 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
9edb8bb6 | 489 | .get_flags = macvlan_ethtool_get_flags, |
b863ceb7 PM |
490 | }; |
491 | ||
54a30c97 SH |
492 | static const struct net_device_ops macvlan_netdev_ops = { |
493 | .ndo_init = macvlan_init, | |
fccaf710 | 494 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
495 | .ndo_open = macvlan_open, |
496 | .ndo_stop = macvlan_stop, | |
00829823 | 497 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
498 | .ndo_change_mtu = macvlan_change_mtu, |
499 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
500 | .ndo_set_mac_address = macvlan_set_mac_address, | |
501 | .ndo_set_multicast_list = macvlan_set_multicast_list, | |
fccaf710 | 502 | .ndo_get_stats = macvlan_dev_get_stats, |
54a30c97 SH |
503 | .ndo_validate_addr = eth_validate_addr, |
504 | }; | |
505 | ||
b863ceb7 PM |
506 | static void macvlan_setup(struct net_device *dev) |
507 | { | |
508 | ether_setup(dev); | |
509 | ||
93f154b5 | 510 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
54a30c97 | 511 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 512 | dev->destructor = free_netdev; |
3b04ddde | 513 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 PM |
514 | dev->ethtool_ops = &macvlan_ethtool_ops; |
515 | dev->tx_queue_len = 0; | |
516 | } | |
517 | ||
518 | static int macvlan_port_create(struct net_device *dev) | |
519 | { | |
520 | struct macvlan_port *port; | |
521 | unsigned int i; | |
522 | ||
523 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
524 | return -EINVAL; | |
525 | ||
526 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
527 | if (port == NULL) | |
528 | return -ENOMEM; | |
529 | ||
530 | port->dev = dev; | |
531 | INIT_LIST_HEAD(&port->vlans); | |
532 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
533 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
534 | rcu_assign_pointer(dev->macvlan_port, port); | |
535 | return 0; | |
536 | } | |
537 | ||
538 | static void macvlan_port_destroy(struct net_device *dev) | |
539 | { | |
540 | struct macvlan_port *port = dev->macvlan_port; | |
541 | ||
542 | rcu_assign_pointer(dev->macvlan_port, NULL); | |
543 | synchronize_rcu(); | |
544 | kfree(port); | |
545 | } | |
546 | ||
b863ceb7 PM |
547 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
548 | { | |
549 | if (tb[IFLA_ADDRESS]) { | |
550 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
551 | return -EINVAL; | |
552 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
553 | return -EADDRNOTAVAIL; | |
554 | } | |
27c0b1a8 AB |
555 | |
556 | if (data && data[IFLA_MACVLAN_MODE]) { | |
557 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
558 | case MACVLAN_MODE_PRIVATE: | |
559 | case MACVLAN_MODE_VEPA: | |
560 | case MACVLAN_MODE_BRIDGE: | |
561 | break; | |
562 | default: | |
563 | return -EINVAL; | |
564 | } | |
565 | } | |
b863ceb7 PM |
566 | return 0; |
567 | } | |
568 | ||
2c114553 ED |
569 | static int macvlan_get_tx_queues(struct net *net, |
570 | struct nlattr *tb[], | |
571 | unsigned int *num_tx_queues, | |
572 | unsigned int *real_num_tx_queues) | |
573 | { | |
574 | struct net_device *real_dev; | |
575 | ||
576 | if (!tb[IFLA_LINK]) | |
577 | return -EINVAL; | |
578 | ||
579 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
580 | if (!real_dev) | |
581 | return -ENODEV; | |
582 | ||
583 | *num_tx_queues = real_dev->num_tx_queues; | |
584 | *real_num_tx_queues = real_dev->real_num_tx_queues; | |
585 | return 0; | |
586 | } | |
587 | ||
fc0663d6 AB |
588 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
589 | struct nlattr *tb[], struct nlattr *data[], | |
590 | int (*receive)(struct sk_buff *skb), | |
591 | int (*forward)(struct net_device *dev, | |
592 | struct sk_buff *skb)) | |
b863ceb7 PM |
593 | { |
594 | struct macvlan_dev *vlan = netdev_priv(dev); | |
595 | struct macvlan_port *port; | |
596 | struct net_device *lowerdev; | |
597 | int err; | |
598 | ||
599 | if (!tb[IFLA_LINK]) | |
600 | return -EINVAL; | |
601 | ||
81adee47 | 602 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
603 | if (lowerdev == NULL) |
604 | return -ENODEV; | |
605 | ||
b0832a29 EB |
606 | /* When creating macvlans on top of other macvlans - use |
607 | * the real device as the lowerdev. | |
a6ca5f1d | 608 | */ |
b0832a29 EB |
609 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
610 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
611 | lowerdev = lowervlan->lowerdev; | |
612 | } | |
a6ca5f1d | 613 | |
b863ceb7 PM |
614 | if (!tb[IFLA_MTU]) |
615 | dev->mtu = lowerdev->mtu; | |
616 | else if (dev->mtu > lowerdev->mtu) | |
617 | return -EINVAL; | |
618 | ||
619 | if (!tb[IFLA_ADDRESS]) | |
620 | random_ether_addr(dev->dev_addr); | |
621 | ||
622 | if (lowerdev->macvlan_port == NULL) { | |
623 | err = macvlan_port_create(lowerdev); | |
624 | if (err < 0) | |
625 | return err; | |
626 | } | |
627 | port = lowerdev->macvlan_port; | |
628 | ||
629 | vlan->lowerdev = lowerdev; | |
630 | vlan->dev = dev; | |
631 | vlan->port = port; | |
fc0663d6 AB |
632 | vlan->receive = receive; |
633 | vlan->forward = forward; | |
b863ceb7 | 634 | |
27c0b1a8 AB |
635 | vlan->mode = MACVLAN_MODE_VEPA; |
636 | if (data && data[IFLA_MACVLAN_MODE]) | |
637 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
638 | ||
b863ceb7 PM |
639 | err = register_netdevice(dev); |
640 | if (err < 0) | |
641 | return err; | |
642 | ||
643 | list_add_tail(&vlan->list, &port->vlans); | |
fc4a7489 | 644 | netif_stacked_transfer_operstate(lowerdev, dev); |
b863ceb7 PM |
645 | return 0; |
646 | } | |
fc0663d6 | 647 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 648 | |
fc0663d6 AB |
649 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
650 | struct nlattr *tb[], struct nlattr *data[]) | |
651 | { | |
652 | return macvlan_common_newlink(src_net, dev, tb, data, | |
653 | netif_rx, | |
654 | dev_forward_skb); | |
655 | } | |
656 | ||
657 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
658 | { |
659 | struct macvlan_dev *vlan = netdev_priv(dev); | |
660 | struct macvlan_port *port = vlan->port; | |
661 | ||
662 | list_del(&vlan->list); | |
23289a37 | 663 | unregister_netdevice_queue(dev, head); |
b863ceb7 PM |
664 | |
665 | if (list_empty(&port->vlans)) | |
73120964 | 666 | macvlan_port_destroy(port->dev); |
b863ceb7 | 667 | } |
fc0663d6 | 668 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 669 | |
27c0b1a8 AB |
670 | static int macvlan_changelink(struct net_device *dev, |
671 | struct nlattr *tb[], struct nlattr *data[]) | |
672 | { | |
673 | struct macvlan_dev *vlan = netdev_priv(dev); | |
674 | if (data && data[IFLA_MACVLAN_MODE]) | |
675 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
676 | return 0; | |
677 | } | |
678 | ||
679 | static size_t macvlan_get_size(const struct net_device *dev) | |
680 | { | |
681 | return nla_total_size(4); | |
682 | } | |
683 | ||
684 | static int macvlan_fill_info(struct sk_buff *skb, | |
685 | const struct net_device *dev) | |
686 | { | |
687 | struct macvlan_dev *vlan = netdev_priv(dev); | |
688 | ||
689 | NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); | |
690 | return 0; | |
691 | ||
692 | nla_put_failure: | |
693 | return -EMSGSIZE; | |
694 | } | |
695 | ||
696 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
697 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, | |
698 | }; | |
699 | ||
fc0663d6 AB |
700 | int macvlan_link_register(struct rtnl_link_ops *ops) |
701 | { | |
702 | /* common fields */ | |
703 | ops->priv_size = sizeof(struct macvlan_dev); | |
704 | ops->get_tx_queues = macvlan_get_tx_queues; | |
705 | ops->setup = macvlan_setup; | |
706 | ops->validate = macvlan_validate; | |
707 | ops->maxtype = IFLA_MACVLAN_MAX; | |
708 | ops->policy = macvlan_policy; | |
709 | ops->changelink = macvlan_changelink; | |
710 | ops->get_size = macvlan_get_size; | |
711 | ops->fill_info = macvlan_fill_info; | |
712 | ||
713 | return rtnl_link_register(ops); | |
714 | }; | |
715 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
716 | ||
717 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 718 | .kind = "macvlan", |
b863ceb7 PM |
719 | .newlink = macvlan_newlink, |
720 | .dellink = macvlan_dellink, | |
721 | }; | |
722 | ||
723 | static int macvlan_device_event(struct notifier_block *unused, | |
724 | unsigned long event, void *ptr) | |
725 | { | |
726 | struct net_device *dev = ptr; | |
727 | struct macvlan_dev *vlan, *next; | |
728 | struct macvlan_port *port; | |
729 | ||
730 | port = dev->macvlan_port; | |
731 | if (port == NULL) | |
732 | return NOTIFY_DONE; | |
733 | ||
734 | switch (event) { | |
735 | case NETDEV_CHANGE: | |
736 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
737 | netif_stacked_transfer_operstate(vlan->lowerdev, |
738 | vlan->dev); | |
b863ceb7 PM |
739 | break; |
740 | case NETDEV_FEAT_CHANGE: | |
741 | list_for_each_entry(vlan, &port->vlans, list) { | |
742 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 743 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
744 | netdev_features_change(vlan->dev); |
745 | } | |
746 | break; | |
747 | case NETDEV_UNREGISTER: | |
748 | list_for_each_entry_safe(vlan, next, &port->vlans, list) | |
fc0663d6 | 749 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, NULL); |
b863ceb7 PM |
750 | break; |
751 | } | |
752 | return NOTIFY_DONE; | |
753 | } | |
754 | ||
755 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
756 | .notifier_call = macvlan_device_event, | |
757 | }; | |
758 | ||
759 | static int __init macvlan_init_module(void) | |
760 | { | |
761 | int err; | |
762 | ||
763 | register_netdevice_notifier(&macvlan_notifier_block); | |
764 | macvlan_handle_frame_hook = macvlan_handle_frame; | |
765 | ||
fc0663d6 | 766 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
767 | if (err < 0) |
768 | goto err1; | |
769 | return 0; | |
770 | err1: | |
52913246 | 771 | macvlan_handle_frame_hook = NULL; |
b863ceb7 PM |
772 | unregister_netdevice_notifier(&macvlan_notifier_block); |
773 | return err; | |
774 | } | |
775 | ||
776 | static void __exit macvlan_cleanup_module(void) | |
777 | { | |
778 | rtnl_link_unregister(&macvlan_link_ops); | |
779 | macvlan_handle_frame_hook = NULL; | |
780 | unregister_netdevice_notifier(&macvlan_notifier_block); | |
781 | } | |
782 | ||
783 | module_init(macvlan_init_module); | |
784 | module_exit(macvlan_cleanup_module); | |
785 | ||
786 | MODULE_LICENSE("GPL"); | |
787 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
788 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
789 | MODULE_ALIAS_RTNL_LINK("macvlan"); |