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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; | |
8b37ef0a | 40 | struct rcu_head rcu; |
b863ceb7 PM |
41 | }; |
42 | ||
b863ceb7 PM |
43 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
44 | const unsigned char *addr) | |
45 | { | |
46 | struct macvlan_dev *vlan; | |
47 | struct hlist_node *n; | |
48 | ||
49 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { | |
ac06713d | 50 | if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
51 | return vlan; |
52 | } | |
53 | return NULL; | |
54 | } | |
55 | ||
f9ac30f0 EB |
56 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
57 | { | |
58 | struct macvlan_port *port = vlan->port; | |
59 | const unsigned char *addr = vlan->dev->dev_addr; | |
60 | ||
61 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
62 | } | |
63 | ||
64 | static void macvlan_hash_del(struct macvlan_dev *vlan) | |
65 | { | |
66 | hlist_del_rcu(&vlan->hlist); | |
67 | synchronize_rcu(); | |
68 | } | |
69 | ||
70 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
71 | const unsigned char *addr) | |
72 | { | |
73 | macvlan_hash_del(vlan); | |
74 | /* Now that we are unhashed it is safe to change the device | |
75 | * address without confusing packet delivery. | |
76 | */ | |
77 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
78 | macvlan_hash_add(vlan); | |
79 | } | |
80 | ||
81 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
82 | const unsigned char *addr) | |
83 | { | |
84 | /* Test to see if the specified multicast address is | |
85 | * currently in use by the underlying device or | |
86 | * another macvlan. | |
87 | */ | |
ac06713d | 88 | if (!compare_ether_addr_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
89 | return 1; |
90 | ||
91 | if (macvlan_hash_lookup(port, addr)) | |
92 | return 1; | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
a1e514c5 | 97 | |
fc0663d6 AB |
98 | static int macvlan_broadcast_one(struct sk_buff *skb, |
99 | const struct macvlan_dev *vlan, | |
618e1b74 | 100 | const struct ethhdr *eth, bool local) |
a1e514c5 | 101 | { |
fc0663d6 | 102 | struct net_device *dev = vlan->dev; |
a1e514c5 AB |
103 | if (!skb) |
104 | return NET_RX_DROP; | |
105 | ||
618e1b74 | 106 | if (local) |
fc0663d6 | 107 | return vlan->forward(dev, skb); |
618e1b74 | 108 | |
a1e514c5 AB |
109 | skb->dev = dev; |
110 | if (!compare_ether_addr_64bits(eth->h_dest, | |
111 | dev->broadcast)) | |
112 | skb->pkt_type = PACKET_BROADCAST; | |
113 | else | |
114 | skb->pkt_type = PACKET_MULTICAST; | |
115 | ||
fc0663d6 | 116 | return vlan->receive(skb); |
a1e514c5 AB |
117 | } |
118 | ||
b863ceb7 | 119 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
120 | const struct macvlan_port *port, |
121 | struct net_device *src, | |
122 | enum macvlan_mode mode) | |
b863ceb7 PM |
123 | { |
124 | const struct ethhdr *eth = eth_hdr(skb); | |
125 | const struct macvlan_dev *vlan; | |
126 | struct hlist_node *n; | |
b863ceb7 PM |
127 | struct sk_buff *nskb; |
128 | unsigned int i; | |
a1e514c5 | 129 | int err; |
b863ceb7 | 130 | |
efbbced3 PM |
131 | if (skb->protocol == htons(ETH_P_PAUSE)) |
132 | return; | |
133 | ||
b863ceb7 PM |
134 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
135 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { | |
618e1b74 AB |
136 | if (vlan->dev == src || !(vlan->mode & mode)) |
137 | continue; | |
138 | ||
b863ceb7 | 139 | nskb = skb_clone(skb, GFP_ATOMIC); |
fc0663d6 | 140 | err = macvlan_broadcast_one(nskb, vlan, eth, |
618e1b74 | 141 | mode == MACVLAN_MODE_BRIDGE); |
a1e514c5 AB |
142 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
143 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
144 | } |
145 | } | |
146 | } | |
147 | ||
148 | /* called under rcu_read_lock() from netif_receive_skb */ | |
ab95bfe0 | 149 | static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb) |
b863ceb7 | 150 | { |
ab95bfe0 | 151 | struct macvlan_port *port; |
b863ceb7 | 152 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 153 | const struct macvlan_dev *vlan; |
618e1b74 | 154 | const struct macvlan_dev *src; |
b863ceb7 | 155 | struct net_device *dev; |
a1e514c5 | 156 | unsigned int len; |
b863ceb7 | 157 | |
ab95bfe0 | 158 | port = rcu_dereference(skb->dev->macvlan_port); |
b863ceb7 | 159 | if (is_multicast_ether_addr(eth->h_dest)) { |
618e1b74 AB |
160 | src = macvlan_hash_lookup(port, eth->h_source); |
161 | if (!src) | |
162 | /* frame comes from an external address */ | |
163 | macvlan_broadcast(skb, port, NULL, | |
164 | MACVLAN_MODE_PRIVATE | | |
165 | MACVLAN_MODE_VEPA | | |
166 | MACVLAN_MODE_BRIDGE); | |
167 | else if (src->mode == MACVLAN_MODE_VEPA) | |
168 | /* flood to everyone except source */ | |
169 | macvlan_broadcast(skb, port, src->dev, | |
170 | MACVLAN_MODE_VEPA | | |
171 | MACVLAN_MODE_BRIDGE); | |
172 | else if (src->mode == MACVLAN_MODE_BRIDGE) | |
173 | /* | |
174 | * flood only to VEPA ports, bridge ports | |
175 | * already saw the frame on the way out. | |
176 | */ | |
177 | macvlan_broadcast(skb, port, src->dev, | |
178 | MACVLAN_MODE_VEPA); | |
b863ceb7 PM |
179 | return skb; |
180 | } | |
181 | ||
182 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
183 | if (vlan == NULL) | |
184 | return skb; | |
185 | ||
186 | dev = vlan->dev; | |
187 | if (unlikely(!(dev->flags & IFF_UP))) { | |
188 | kfree_skb(skb); | |
189 | return NULL; | |
190 | } | |
a1e514c5 | 191 | len = skb->len + ETH_HLEN; |
b863ceb7 | 192 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 AB |
193 | macvlan_count_rx(vlan, len, skb != NULL, 0); |
194 | if (!skb) | |
b863ceb7 | 195 | return NULL; |
b863ceb7 PM |
196 | |
197 | skb->dev = dev; | |
198 | skb->pkt_type = PACKET_HOST; | |
199 | ||
fc0663d6 | 200 | vlan->receive(skb); |
b863ceb7 PM |
201 | return NULL; |
202 | } | |
203 | ||
618e1b74 AB |
204 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
205 | { | |
206 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
207 | const struct macvlan_port *port = vlan->port; | |
208 | const struct macvlan_dev *dest; | |
209 | ||
210 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
211 | const struct ethhdr *eth = (void *)skb->data; | |
212 | ||
213 | /* send to other bridge ports directly */ | |
214 | if (is_multicast_ether_addr(eth->h_dest)) { | |
215 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
216 | goto xmit_world; | |
217 | } | |
218 | ||
219 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
220 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
221 | unsigned int length = skb->len + ETH_HLEN; | |
fc0663d6 | 222 | int ret = dest->forward(dest->dev, skb); |
618e1b74 AB |
223 | macvlan_count_rx(dest, length, |
224 | ret == NET_RX_SUCCESS, 0); | |
225 | ||
226 | return NET_XMIT_SUCCESS; | |
227 | } | |
228 | } | |
229 | ||
230 | xmit_world: | |
8a83a00b | 231 | skb_set_dev(skb, vlan->lowerdev); |
618e1b74 AB |
232 | return dev_queue_xmit(skb); |
233 | } | |
234 | ||
fc0663d6 AB |
235 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
236 | struct net_device *dev) | |
b863ceb7 | 237 | { |
2c114553 ED |
238 | int i = skb_get_queue_mapping(skb); |
239 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
b863ceb7 PM |
240 | unsigned int len = skb->len; |
241 | int ret; | |
242 | ||
618e1b74 | 243 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 244 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
2c114553 ED |
245 | txq->tx_packets++; |
246 | txq->tx_bytes += len; | |
247 | } else | |
248 | txq->tx_dropped++; | |
249 | ||
cbbef5e1 | 250 | return ret; |
b863ceb7 | 251 | } |
fc0663d6 | 252 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
253 | |
254 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
255 | unsigned short type, const void *daddr, |
256 | const void *saddr, unsigned len) | |
b863ceb7 PM |
257 | { |
258 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
259 | struct net_device *lowerdev = vlan->lowerdev; | |
260 | ||
0c4e8581 SH |
261 | return dev_hard_header(skb, lowerdev, type, daddr, |
262 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
263 | } |
264 | ||
3b04ddde SH |
265 | static const struct header_ops macvlan_hard_header_ops = { |
266 | .create = macvlan_hard_header, | |
267 | .rebuild = eth_rebuild_header, | |
268 | .parse = eth_header_parse, | |
3b04ddde SH |
269 | .cache = eth_header_cache, |
270 | .cache_update = eth_header_cache_update, | |
271 | }; | |
272 | ||
b863ceb7 PM |
273 | static int macvlan_open(struct net_device *dev) |
274 | { | |
275 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
276 | struct net_device *lowerdev = vlan->lowerdev; |
277 | int err; | |
278 | ||
f9ac30f0 EB |
279 | err = -EBUSY; |
280 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
281 | goto out; | |
282 | ||
a748ee24 | 283 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 284 | if (err < 0) |
b89fb7da WC |
285 | goto out; |
286 | if (dev->flags & IFF_ALLMULTI) { | |
287 | err = dev_set_allmulti(lowerdev, 1); | |
288 | if (err < 0) | |
289 | goto del_unicast; | |
290 | } | |
f9ac30f0 | 291 | macvlan_hash_add(vlan); |
b863ceb7 | 292 | return 0; |
b89fb7da WC |
293 | |
294 | del_unicast: | |
a748ee24 | 295 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
296 | out: |
297 | return err; | |
b863ceb7 PM |
298 | } |
299 | ||
300 | static int macvlan_stop(struct net_device *dev) | |
301 | { | |
302 | struct macvlan_dev *vlan = netdev_priv(dev); | |
303 | struct net_device *lowerdev = vlan->lowerdev; | |
304 | ||
305 | dev_mc_unsync(lowerdev, dev); | |
306 | if (dev->flags & IFF_ALLMULTI) | |
307 | dev_set_allmulti(lowerdev, -1); | |
308 | ||
a748ee24 | 309 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 310 | |
f9ac30f0 | 311 | macvlan_hash_del(vlan); |
b863ceb7 PM |
312 | return 0; |
313 | } | |
314 | ||
ad5d20a6 PM |
315 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
316 | { | |
317 | struct macvlan_dev *vlan = netdev_priv(dev); | |
318 | struct net_device *lowerdev = vlan->lowerdev; | |
319 | struct sockaddr *addr = p; | |
320 | int err; | |
321 | ||
322 | if (!is_valid_ether_addr(addr->sa_data)) | |
323 | return -EADDRNOTAVAIL; | |
324 | ||
f9ac30f0 EB |
325 | if (!(dev->flags & IFF_UP)) { |
326 | /* Just copy in the new address */ | |
327 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
328 | } else { | |
329 | /* Rehash and update the device filters */ | |
330 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
331 | return -EBUSY; | |
ad5d20a6 | 332 | |
a748ee24 | 333 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 334 | if (err) |
f9ac30f0 | 335 | return err; |
ad5d20a6 | 336 | |
a748ee24 | 337 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
338 | |
339 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
340 | } | |
ad5d20a6 PM |
341 | return 0; |
342 | } | |
343 | ||
b863ceb7 PM |
344 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
345 | { | |
346 | struct macvlan_dev *vlan = netdev_priv(dev); | |
347 | struct net_device *lowerdev = vlan->lowerdev; | |
348 | ||
349 | if (change & IFF_ALLMULTI) | |
350 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
351 | } | |
352 | ||
353 | static void macvlan_set_multicast_list(struct net_device *dev) | |
354 | { | |
355 | struct macvlan_dev *vlan = netdev_priv(dev); | |
356 | ||
357 | dev_mc_sync(vlan->lowerdev, dev); | |
358 | } | |
359 | ||
360 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
361 | { | |
362 | struct macvlan_dev *vlan = netdev_priv(dev); | |
363 | ||
364 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
365 | return -EINVAL; | |
366 | dev->mtu = new_mtu; | |
367 | return 0; | |
368 | } | |
369 | ||
370 | /* | |
371 | * macvlan network devices have devices nesting below it and are a special | |
372 | * "super class" of normal network devices; split their locks off into a | |
373 | * separate class since they always nest. | |
374 | */ | |
375 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 376 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
377 | |
378 | #define MACVLAN_FEATURES \ | |
379 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
380 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
6eb3a855 | 381 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO) |
b863ceb7 PM |
382 | |
383 | #define MACVLAN_STATE_MASK \ | |
384 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
385 | ||
e8a0464c DM |
386 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
387 | struct netdev_queue *txq, | |
388 | void *_unused) | |
c773e847 DM |
389 | { |
390 | lockdep_set_class(&txq->_xmit_lock, | |
391 | &macvlan_netdev_xmit_lock_key); | |
392 | } | |
393 | ||
394 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
395 | { | |
cf508b12 DM |
396 | lockdep_set_class(&dev->addr_list_lock, |
397 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 398 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
399 | } |
400 | ||
b863ceb7 PM |
401 | static int macvlan_init(struct net_device *dev) |
402 | { | |
403 | struct macvlan_dev *vlan = netdev_priv(dev); | |
404 | const struct net_device *lowerdev = vlan->lowerdev; | |
405 | ||
406 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
407 | (lowerdev->state & MACVLAN_STATE_MASK); | |
408 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8c2acc53 | 409 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 410 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 411 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 412 | |
c773e847 DM |
413 | macvlan_set_lockdep_class(dev); |
414 | ||
fccaf710 ED |
415 | vlan->rx_stats = alloc_percpu(struct macvlan_rx_stats); |
416 | if (!vlan->rx_stats) | |
417 | return -ENOMEM; | |
418 | ||
b863ceb7 PM |
419 | return 0; |
420 | } | |
421 | ||
fccaf710 ED |
422 | static void macvlan_uninit(struct net_device *dev) |
423 | { | |
424 | struct macvlan_dev *vlan = netdev_priv(dev); | |
425 | ||
426 | free_percpu(vlan->rx_stats); | |
427 | } | |
428 | ||
429 | static struct net_device_stats *macvlan_dev_get_stats(struct net_device *dev) | |
430 | { | |
431 | struct net_device_stats *stats = &dev->stats; | |
432 | struct macvlan_dev *vlan = netdev_priv(dev); | |
433 | ||
434 | dev_txq_stats_fold(dev, stats); | |
435 | ||
436 | if (vlan->rx_stats) { | |
437 | struct macvlan_rx_stats *p, rx = {0}; | |
438 | int i; | |
439 | ||
440 | for_each_possible_cpu(i) { | |
441 | p = per_cpu_ptr(vlan->rx_stats, i); | |
442 | rx.rx_packets += p->rx_packets; | |
443 | rx.rx_bytes += p->rx_bytes; | |
444 | rx.rx_errors += p->rx_errors; | |
445 | rx.multicast += p->multicast; | |
446 | } | |
447 | stats->rx_packets = rx.rx_packets; | |
448 | stats->rx_bytes = rx.rx_bytes; | |
449 | stats->rx_errors = rx.rx_errors; | |
450 | stats->rx_dropped = rx.rx_errors; | |
451 | stats->multicast = rx.multicast; | |
452 | } | |
453 | return stats; | |
454 | } | |
455 | ||
b863ceb7 PM |
456 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
457 | struct ethtool_drvinfo *drvinfo) | |
458 | { | |
459 | snprintf(drvinfo->driver, 32, "macvlan"); | |
460 | snprintf(drvinfo->version, 32, "0.1"); | |
461 | } | |
462 | ||
463 | static u32 macvlan_ethtool_get_rx_csum(struct net_device *dev) | |
464 | { | |
465 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 466 | return dev_ethtool_get_rx_csum(vlan->lowerdev); |
b863ceb7 PM |
467 | } |
468 | ||
9edb8bb6 SH |
469 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
470 | struct ethtool_cmd *cmd) | |
471 | { | |
472 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 473 | return dev_ethtool_get_settings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
474 | } |
475 | ||
476 | static u32 macvlan_ethtool_get_flags(struct net_device *dev) | |
477 | { | |
478 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 479 | return dev_ethtool_get_flags(vlan->lowerdev); |
9edb8bb6 SH |
480 | } |
481 | ||
b863ceb7 PM |
482 | static const struct ethtool_ops macvlan_ethtool_ops = { |
483 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 484 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 | 485 | .get_rx_csum = macvlan_ethtool_get_rx_csum, |
b863ceb7 | 486 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
9edb8bb6 | 487 | .get_flags = macvlan_ethtool_get_flags, |
b863ceb7 PM |
488 | }; |
489 | ||
54a30c97 SH |
490 | static const struct net_device_ops macvlan_netdev_ops = { |
491 | .ndo_init = macvlan_init, | |
fccaf710 | 492 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
493 | .ndo_open = macvlan_open, |
494 | .ndo_stop = macvlan_stop, | |
00829823 | 495 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
496 | .ndo_change_mtu = macvlan_change_mtu, |
497 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
498 | .ndo_set_mac_address = macvlan_set_mac_address, | |
499 | .ndo_set_multicast_list = macvlan_set_multicast_list, | |
fccaf710 | 500 | .ndo_get_stats = macvlan_dev_get_stats, |
54a30c97 SH |
501 | .ndo_validate_addr = eth_validate_addr, |
502 | }; | |
503 | ||
b863ceb7 PM |
504 | static void macvlan_setup(struct net_device *dev) |
505 | { | |
506 | ether_setup(dev); | |
507 | ||
93f154b5 | 508 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
54a30c97 | 509 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 510 | dev->destructor = free_netdev; |
3b04ddde | 511 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 PM |
512 | dev->ethtool_ops = &macvlan_ethtool_ops; |
513 | dev->tx_queue_len = 0; | |
514 | } | |
515 | ||
516 | static int macvlan_port_create(struct net_device *dev) | |
517 | { | |
518 | struct macvlan_port *port; | |
519 | unsigned int i; | |
ab95bfe0 | 520 | int err; |
b863ceb7 PM |
521 | |
522 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
523 | return -EINVAL; | |
524 | ||
525 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
526 | if (port == NULL) | |
527 | return -ENOMEM; | |
528 | ||
529 | port->dev = dev; | |
530 | INIT_LIST_HEAD(&port->vlans); | |
531 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
532 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
533 | rcu_assign_pointer(dev->macvlan_port, port); | |
ab95bfe0 | 534 | |
93e2c32b | 535 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, NULL); |
ab95bfe0 JP |
536 | if (err) { |
537 | rcu_assign_pointer(dev->macvlan_port, NULL); | |
538 | kfree(port); | |
539 | } | |
540 | ||
541 | return err; | |
b863ceb7 PM |
542 | } |
543 | ||
8b37ef0a JP |
544 | static void macvlan_port_rcu_free(struct rcu_head *head) |
545 | { | |
546 | struct macvlan_port *port; | |
547 | ||
548 | port = container_of(head, struct macvlan_port, rcu); | |
549 | kfree(port); | |
550 | } | |
551 | ||
b863ceb7 PM |
552 | static void macvlan_port_destroy(struct net_device *dev) |
553 | { | |
554 | struct macvlan_port *port = dev->macvlan_port; | |
555 | ||
ab95bfe0 | 556 | netdev_rx_handler_unregister(dev); |
b863ceb7 | 557 | rcu_assign_pointer(dev->macvlan_port, NULL); |
8b37ef0a | 558 | call_rcu(&port->rcu, macvlan_port_rcu_free); |
b863ceb7 PM |
559 | } |
560 | ||
b863ceb7 PM |
561 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
562 | { | |
563 | if (tb[IFLA_ADDRESS]) { | |
564 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
565 | return -EINVAL; | |
566 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
567 | return -EADDRNOTAVAIL; | |
568 | } | |
27c0b1a8 AB |
569 | |
570 | if (data && data[IFLA_MACVLAN_MODE]) { | |
571 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
572 | case MACVLAN_MODE_PRIVATE: | |
573 | case MACVLAN_MODE_VEPA: | |
574 | case MACVLAN_MODE_BRIDGE: | |
575 | break; | |
576 | default: | |
577 | return -EINVAL; | |
578 | } | |
579 | } | |
b863ceb7 PM |
580 | return 0; |
581 | } | |
582 | ||
2c114553 ED |
583 | static int macvlan_get_tx_queues(struct net *net, |
584 | struct nlattr *tb[], | |
585 | unsigned int *num_tx_queues, | |
586 | unsigned int *real_num_tx_queues) | |
587 | { | |
588 | struct net_device *real_dev; | |
589 | ||
590 | if (!tb[IFLA_LINK]) | |
591 | return -EINVAL; | |
592 | ||
593 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
594 | if (!real_dev) | |
595 | return -ENODEV; | |
596 | ||
597 | *num_tx_queues = real_dev->num_tx_queues; | |
598 | *real_num_tx_queues = real_dev->real_num_tx_queues; | |
599 | return 0; | |
600 | } | |
601 | ||
fc0663d6 AB |
602 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
603 | struct nlattr *tb[], struct nlattr *data[], | |
604 | int (*receive)(struct sk_buff *skb), | |
605 | int (*forward)(struct net_device *dev, | |
606 | struct sk_buff *skb)) | |
b863ceb7 PM |
607 | { |
608 | struct macvlan_dev *vlan = netdev_priv(dev); | |
609 | struct macvlan_port *port; | |
610 | struct net_device *lowerdev; | |
611 | int err; | |
612 | ||
613 | if (!tb[IFLA_LINK]) | |
614 | return -EINVAL; | |
615 | ||
81adee47 | 616 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
617 | if (lowerdev == NULL) |
618 | return -ENODEV; | |
619 | ||
b0832a29 EB |
620 | /* When creating macvlans on top of other macvlans - use |
621 | * the real device as the lowerdev. | |
a6ca5f1d | 622 | */ |
b0832a29 EB |
623 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
624 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
625 | lowerdev = lowervlan->lowerdev; | |
626 | } | |
a6ca5f1d | 627 | |
b863ceb7 PM |
628 | if (!tb[IFLA_MTU]) |
629 | dev->mtu = lowerdev->mtu; | |
630 | else if (dev->mtu > lowerdev->mtu) | |
631 | return -EINVAL; | |
632 | ||
633 | if (!tb[IFLA_ADDRESS]) | |
634 | random_ether_addr(dev->dev_addr); | |
635 | ||
636 | if (lowerdev->macvlan_port == NULL) { | |
637 | err = macvlan_port_create(lowerdev); | |
638 | if (err < 0) | |
639 | return err; | |
640 | } | |
641 | port = lowerdev->macvlan_port; | |
642 | ||
643 | vlan->lowerdev = lowerdev; | |
644 | vlan->dev = dev; | |
645 | vlan->port = port; | |
fc0663d6 AB |
646 | vlan->receive = receive; |
647 | vlan->forward = forward; | |
b863ceb7 | 648 | |
27c0b1a8 AB |
649 | vlan->mode = MACVLAN_MODE_VEPA; |
650 | if (data && data[IFLA_MACVLAN_MODE]) | |
651 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
652 | ||
b863ceb7 PM |
653 | err = register_netdevice(dev); |
654 | if (err < 0) | |
f16d3d57 | 655 | goto destroy_port; |
b863ceb7 PM |
656 | |
657 | list_add_tail(&vlan->list, &port->vlans); | |
fc4a7489 | 658 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 659 | |
b863ceb7 | 660 | return 0; |
f16d3d57 JP |
661 | |
662 | destroy_port: | |
663 | if (list_empty(&port->vlans)) | |
664 | macvlan_port_destroy(lowerdev); | |
665 | ||
666 | return err; | |
b863ceb7 | 667 | } |
fc0663d6 | 668 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 669 | |
fc0663d6 AB |
670 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
671 | struct nlattr *tb[], struct nlattr *data[]) | |
672 | { | |
673 | return macvlan_common_newlink(src_net, dev, tb, data, | |
674 | netif_rx, | |
675 | dev_forward_skb); | |
676 | } | |
677 | ||
678 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
679 | { |
680 | struct macvlan_dev *vlan = netdev_priv(dev); | |
681 | struct macvlan_port *port = vlan->port; | |
682 | ||
683 | list_del(&vlan->list); | |
23289a37 | 684 | unregister_netdevice_queue(dev, head); |
b863ceb7 PM |
685 | |
686 | if (list_empty(&port->vlans)) | |
73120964 | 687 | macvlan_port_destroy(port->dev); |
b863ceb7 | 688 | } |
fc0663d6 | 689 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 690 | |
27c0b1a8 AB |
691 | static int macvlan_changelink(struct net_device *dev, |
692 | struct nlattr *tb[], struct nlattr *data[]) | |
693 | { | |
694 | struct macvlan_dev *vlan = netdev_priv(dev); | |
695 | if (data && data[IFLA_MACVLAN_MODE]) | |
696 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
697 | return 0; | |
698 | } | |
699 | ||
700 | static size_t macvlan_get_size(const struct net_device *dev) | |
701 | { | |
702 | return nla_total_size(4); | |
703 | } | |
704 | ||
705 | static int macvlan_fill_info(struct sk_buff *skb, | |
706 | const struct net_device *dev) | |
707 | { | |
708 | struct macvlan_dev *vlan = netdev_priv(dev); | |
709 | ||
710 | NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); | |
711 | return 0; | |
712 | ||
713 | nla_put_failure: | |
714 | return -EMSGSIZE; | |
715 | } | |
716 | ||
717 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
718 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, | |
719 | }; | |
720 | ||
fc0663d6 AB |
721 | int macvlan_link_register(struct rtnl_link_ops *ops) |
722 | { | |
723 | /* common fields */ | |
724 | ops->priv_size = sizeof(struct macvlan_dev); | |
725 | ops->get_tx_queues = macvlan_get_tx_queues; | |
726 | ops->setup = macvlan_setup; | |
727 | ops->validate = macvlan_validate; | |
728 | ops->maxtype = IFLA_MACVLAN_MAX; | |
729 | ops->policy = macvlan_policy; | |
730 | ops->changelink = macvlan_changelink; | |
731 | ops->get_size = macvlan_get_size; | |
732 | ops->fill_info = macvlan_fill_info; | |
733 | ||
734 | return rtnl_link_register(ops); | |
735 | }; | |
736 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
737 | ||
738 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 739 | .kind = "macvlan", |
b863ceb7 PM |
740 | .newlink = macvlan_newlink, |
741 | .dellink = macvlan_dellink, | |
742 | }; | |
743 | ||
744 | static int macvlan_device_event(struct notifier_block *unused, | |
745 | unsigned long event, void *ptr) | |
746 | { | |
747 | struct net_device *dev = ptr; | |
748 | struct macvlan_dev *vlan, *next; | |
749 | struct macvlan_port *port; | |
750 | ||
751 | port = dev->macvlan_port; | |
752 | if (port == NULL) | |
753 | return NOTIFY_DONE; | |
754 | ||
755 | switch (event) { | |
756 | case NETDEV_CHANGE: | |
757 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
758 | netif_stacked_transfer_operstate(vlan->lowerdev, |
759 | vlan->dev); | |
b863ceb7 PM |
760 | break; |
761 | case NETDEV_FEAT_CHANGE: | |
762 | list_for_each_entry(vlan, &port->vlans, list) { | |
763 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 764 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
765 | netdev_features_change(vlan->dev); |
766 | } | |
767 | break; | |
768 | case NETDEV_UNREGISTER: | |
769 | list_for_each_entry_safe(vlan, next, &port->vlans, list) | |
fc0663d6 | 770 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, NULL); |
b863ceb7 | 771 | break; |
1c01fe14 JP |
772 | case NETDEV_PRE_TYPE_CHANGE: |
773 | /* Forbid underlaying device to change its type. */ | |
774 | return NOTIFY_BAD; | |
b863ceb7 PM |
775 | } |
776 | return NOTIFY_DONE; | |
777 | } | |
778 | ||
779 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
780 | .notifier_call = macvlan_device_event, | |
781 | }; | |
782 | ||
783 | static int __init macvlan_init_module(void) | |
784 | { | |
785 | int err; | |
786 | ||
787 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 788 | |
fc0663d6 | 789 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
790 | if (err < 0) |
791 | goto err1; | |
792 | return 0; | |
793 | err1: | |
b863ceb7 PM |
794 | unregister_netdevice_notifier(&macvlan_notifier_block); |
795 | return err; | |
796 | } | |
797 | ||
798 | static void __exit macvlan_cleanup_module(void) | |
799 | { | |
800 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
801 | unregister_netdevice_notifier(&macvlan_notifier_block); |
802 | } | |
803 | ||
804 | module_init(macvlan_init_module); | |
805 | module_exit(macvlan_cleanup_module); | |
806 | ||
807 | MODULE_LICENSE("GPL"); | |
808 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
809 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
810 | MODULE_ALIAS_RTNL_LINK("macvlan"); |