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; | |
8b37ef0a | 40 | struct rcu_head rcu; |
b863ceb7 PM |
41 | }; |
42 | ||
a35e2c1b JP |
43 | #define macvlan_port_get_rcu(dev) \ |
44 | ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data)) | |
45 | #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data) | |
46 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) | |
47 | ||
b863ceb7 PM |
48 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
49 | const unsigned char *addr) | |
50 | { | |
51 | struct macvlan_dev *vlan; | |
52 | struct hlist_node *n; | |
53 | ||
54 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { | |
ac06713d | 55 | if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
56 | return vlan; |
57 | } | |
58 | return NULL; | |
59 | } | |
60 | ||
f9ac30f0 EB |
61 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
62 | { | |
63 | struct macvlan_port *port = vlan->port; | |
64 | const unsigned char *addr = vlan->dev->dev_addr; | |
65 | ||
66 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
67 | } | |
68 | ||
69 | static void macvlan_hash_del(struct macvlan_dev *vlan) | |
70 | { | |
71 | hlist_del_rcu(&vlan->hlist); | |
72 | synchronize_rcu(); | |
73 | } | |
74 | ||
75 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
76 | const unsigned char *addr) | |
77 | { | |
78 | macvlan_hash_del(vlan); | |
79 | /* Now that we are unhashed it is safe to change the device | |
80 | * address without confusing packet delivery. | |
81 | */ | |
82 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
83 | macvlan_hash_add(vlan); | |
84 | } | |
85 | ||
86 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
87 | const unsigned char *addr) | |
88 | { | |
89 | /* Test to see if the specified multicast address is | |
90 | * currently in use by the underlying device or | |
91 | * another macvlan. | |
92 | */ | |
ac06713d | 93 | if (!compare_ether_addr_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
94 | return 1; |
95 | ||
96 | if (macvlan_hash_lookup(port, addr)) | |
97 | return 1; | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
a1e514c5 | 102 | |
fc0663d6 AB |
103 | static int macvlan_broadcast_one(struct sk_buff *skb, |
104 | const struct macvlan_dev *vlan, | |
618e1b74 | 105 | const struct ethhdr *eth, bool local) |
a1e514c5 | 106 | { |
fc0663d6 | 107 | struct net_device *dev = vlan->dev; |
a1e514c5 AB |
108 | if (!skb) |
109 | return NET_RX_DROP; | |
110 | ||
618e1b74 | 111 | if (local) |
fc0663d6 | 112 | return vlan->forward(dev, skb); |
618e1b74 | 113 | |
a1e514c5 AB |
114 | skb->dev = dev; |
115 | if (!compare_ether_addr_64bits(eth->h_dest, | |
116 | dev->broadcast)) | |
117 | skb->pkt_type = PACKET_BROADCAST; | |
118 | else | |
119 | skb->pkt_type = PACKET_MULTICAST; | |
120 | ||
fc0663d6 | 121 | return vlan->receive(skb); |
a1e514c5 AB |
122 | } |
123 | ||
b863ceb7 | 124 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
125 | const struct macvlan_port *port, |
126 | struct net_device *src, | |
127 | enum macvlan_mode mode) | |
b863ceb7 PM |
128 | { |
129 | const struct ethhdr *eth = eth_hdr(skb); | |
130 | const struct macvlan_dev *vlan; | |
131 | struct hlist_node *n; | |
b863ceb7 PM |
132 | struct sk_buff *nskb; |
133 | unsigned int i; | |
a1e514c5 | 134 | int err; |
b863ceb7 | 135 | |
efbbced3 PM |
136 | if (skb->protocol == htons(ETH_P_PAUSE)) |
137 | return; | |
138 | ||
b863ceb7 PM |
139 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
140 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { | |
618e1b74 AB |
141 | if (vlan->dev == src || !(vlan->mode & mode)) |
142 | continue; | |
143 | ||
b863ceb7 | 144 | nskb = skb_clone(skb, GFP_ATOMIC); |
fc0663d6 | 145 | err = macvlan_broadcast_one(nskb, vlan, eth, |
618e1b74 | 146 | mode == MACVLAN_MODE_BRIDGE); |
a1e514c5 AB |
147 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
148 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
149 | } |
150 | } | |
151 | } | |
152 | ||
153 | /* called under rcu_read_lock() from netif_receive_skb */ | |
ab95bfe0 | 154 | static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb) |
b863ceb7 | 155 | { |
ab95bfe0 | 156 | struct macvlan_port *port; |
b863ceb7 | 157 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 158 | const struct macvlan_dev *vlan; |
618e1b74 | 159 | const struct macvlan_dev *src; |
b863ceb7 | 160 | struct net_device *dev; |
ba01877f SS |
161 | unsigned int len = 0; |
162 | int ret = NET_RX_DROP; | |
b863ceb7 | 163 | |
a35e2c1b | 164 | port = macvlan_port_get_rcu(skb->dev); |
b863ceb7 | 165 | if (is_multicast_ether_addr(eth->h_dest)) { |
618e1b74 AB |
166 | src = macvlan_hash_lookup(port, eth->h_source); |
167 | if (!src) | |
168 | /* frame comes from an external address */ | |
169 | macvlan_broadcast(skb, port, NULL, | |
170 | MACVLAN_MODE_PRIVATE | | |
171 | MACVLAN_MODE_VEPA | | |
172 | MACVLAN_MODE_BRIDGE); | |
173 | else if (src->mode == MACVLAN_MODE_VEPA) | |
174 | /* flood to everyone except source */ | |
175 | macvlan_broadcast(skb, port, src->dev, | |
176 | MACVLAN_MODE_VEPA | | |
177 | MACVLAN_MODE_BRIDGE); | |
178 | else if (src->mode == MACVLAN_MODE_BRIDGE) | |
179 | /* | |
180 | * flood only to VEPA ports, bridge ports | |
181 | * already saw the frame on the way out. | |
182 | */ | |
183 | macvlan_broadcast(skb, port, src->dev, | |
184 | MACVLAN_MODE_VEPA); | |
b863ceb7 PM |
185 | return skb; |
186 | } | |
187 | ||
188 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
189 | if (vlan == NULL) | |
190 | return skb; | |
191 | ||
192 | dev = vlan->dev; | |
193 | if (unlikely(!(dev->flags & IFF_UP))) { | |
194 | kfree_skb(skb); | |
195 | return NULL; | |
196 | } | |
a1e514c5 | 197 | len = skb->len + ETH_HLEN; |
b863ceb7 | 198 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 199 | if (!skb) |
ba01877f | 200 | goto out; |
b863ceb7 PM |
201 | |
202 | skb->dev = dev; | |
203 | skb->pkt_type = PACKET_HOST; | |
204 | ||
ba01877f SS |
205 | ret = vlan->receive(skb); |
206 | ||
207 | out: | |
208 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
b863ceb7 PM |
209 | return NULL; |
210 | } | |
211 | ||
618e1b74 AB |
212 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
213 | { | |
214 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
215 | const struct macvlan_port *port = vlan->port; | |
216 | const struct macvlan_dev *dest; | |
217 | ||
218 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
219 | const struct ethhdr *eth = (void *)skb->data; | |
220 | ||
221 | /* send to other bridge ports directly */ | |
222 | if (is_multicast_ether_addr(eth->h_dest)) { | |
223 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
224 | goto xmit_world; | |
225 | } | |
226 | ||
227 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
228 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
229 | unsigned int length = skb->len + ETH_HLEN; | |
fc0663d6 | 230 | int ret = dest->forward(dest->dev, skb); |
618e1b74 AB |
231 | macvlan_count_rx(dest, length, |
232 | ret == NET_RX_SUCCESS, 0); | |
233 | ||
234 | return NET_XMIT_SUCCESS; | |
235 | } | |
236 | } | |
237 | ||
238 | xmit_world: | |
8a83a00b | 239 | skb_set_dev(skb, vlan->lowerdev); |
618e1b74 AB |
240 | return dev_queue_xmit(skb); |
241 | } | |
242 | ||
fc0663d6 AB |
243 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
244 | struct net_device *dev) | |
b863ceb7 | 245 | { |
2c114553 ED |
246 | int i = skb_get_queue_mapping(skb); |
247 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
b863ceb7 PM |
248 | unsigned int len = skb->len; |
249 | int ret; | |
250 | ||
618e1b74 | 251 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 252 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
2c114553 ED |
253 | txq->tx_packets++; |
254 | txq->tx_bytes += len; | |
255 | } else | |
256 | txq->tx_dropped++; | |
257 | ||
cbbef5e1 | 258 | return ret; |
b863ceb7 | 259 | } |
fc0663d6 | 260 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
261 | |
262 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
263 | unsigned short type, const void *daddr, |
264 | const void *saddr, unsigned len) | |
b863ceb7 PM |
265 | { |
266 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
267 | struct net_device *lowerdev = vlan->lowerdev; | |
268 | ||
0c4e8581 SH |
269 | return dev_hard_header(skb, lowerdev, type, daddr, |
270 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
271 | } |
272 | ||
3b04ddde SH |
273 | static const struct header_ops macvlan_hard_header_ops = { |
274 | .create = macvlan_hard_header, | |
275 | .rebuild = eth_rebuild_header, | |
276 | .parse = eth_header_parse, | |
3b04ddde SH |
277 | .cache = eth_header_cache, |
278 | .cache_update = eth_header_cache_update, | |
279 | }; | |
280 | ||
b863ceb7 PM |
281 | static int macvlan_open(struct net_device *dev) |
282 | { | |
283 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
284 | struct net_device *lowerdev = vlan->lowerdev; |
285 | int err; | |
286 | ||
f9ac30f0 EB |
287 | err = -EBUSY; |
288 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
289 | goto out; | |
290 | ||
a748ee24 | 291 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 292 | if (err < 0) |
b89fb7da WC |
293 | goto out; |
294 | if (dev->flags & IFF_ALLMULTI) { | |
295 | err = dev_set_allmulti(lowerdev, 1); | |
296 | if (err < 0) | |
297 | goto del_unicast; | |
298 | } | |
f9ac30f0 | 299 | macvlan_hash_add(vlan); |
b863ceb7 | 300 | return 0; |
b89fb7da WC |
301 | |
302 | del_unicast: | |
a748ee24 | 303 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
304 | out: |
305 | return err; | |
b863ceb7 PM |
306 | } |
307 | ||
308 | static int macvlan_stop(struct net_device *dev) | |
309 | { | |
310 | struct macvlan_dev *vlan = netdev_priv(dev); | |
311 | struct net_device *lowerdev = vlan->lowerdev; | |
312 | ||
313 | dev_mc_unsync(lowerdev, dev); | |
314 | if (dev->flags & IFF_ALLMULTI) | |
315 | dev_set_allmulti(lowerdev, -1); | |
316 | ||
a748ee24 | 317 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 318 | |
f9ac30f0 | 319 | macvlan_hash_del(vlan); |
b863ceb7 PM |
320 | return 0; |
321 | } | |
322 | ||
ad5d20a6 PM |
323 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
324 | { | |
325 | struct macvlan_dev *vlan = netdev_priv(dev); | |
326 | struct net_device *lowerdev = vlan->lowerdev; | |
327 | struct sockaddr *addr = p; | |
328 | int err; | |
329 | ||
330 | if (!is_valid_ether_addr(addr->sa_data)) | |
331 | return -EADDRNOTAVAIL; | |
332 | ||
f9ac30f0 EB |
333 | if (!(dev->flags & IFF_UP)) { |
334 | /* Just copy in the new address */ | |
335 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
336 | } else { | |
337 | /* Rehash and update the device filters */ | |
338 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
339 | return -EBUSY; | |
ad5d20a6 | 340 | |
a748ee24 | 341 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 342 | if (err) |
f9ac30f0 | 343 | return err; |
ad5d20a6 | 344 | |
a748ee24 | 345 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
346 | |
347 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
348 | } | |
ad5d20a6 PM |
349 | return 0; |
350 | } | |
351 | ||
b863ceb7 PM |
352 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
353 | { | |
354 | struct macvlan_dev *vlan = netdev_priv(dev); | |
355 | struct net_device *lowerdev = vlan->lowerdev; | |
356 | ||
357 | if (change & IFF_ALLMULTI) | |
358 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
359 | } | |
360 | ||
361 | static void macvlan_set_multicast_list(struct net_device *dev) | |
362 | { | |
363 | struct macvlan_dev *vlan = netdev_priv(dev); | |
364 | ||
365 | dev_mc_sync(vlan->lowerdev, dev); | |
366 | } | |
367 | ||
368 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
369 | { | |
370 | struct macvlan_dev *vlan = netdev_priv(dev); | |
371 | ||
372 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
373 | return -EINVAL; | |
374 | dev->mtu = new_mtu; | |
375 | return 0; | |
376 | } | |
377 | ||
378 | /* | |
379 | * macvlan network devices have devices nesting below it and are a special | |
380 | * "super class" of normal network devices; split their locks off into a | |
381 | * separate class since they always nest. | |
382 | */ | |
383 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 384 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
385 | |
386 | #define MACVLAN_FEATURES \ | |
387 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
388 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
6eb3a855 | 389 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO) |
b863ceb7 PM |
390 | |
391 | #define MACVLAN_STATE_MASK \ | |
392 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
393 | ||
e8a0464c DM |
394 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
395 | struct netdev_queue *txq, | |
396 | void *_unused) | |
c773e847 DM |
397 | { |
398 | lockdep_set_class(&txq->_xmit_lock, | |
399 | &macvlan_netdev_xmit_lock_key); | |
400 | } | |
401 | ||
402 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
403 | { | |
cf508b12 DM |
404 | lockdep_set_class(&dev->addr_list_lock, |
405 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 406 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
407 | } |
408 | ||
b863ceb7 PM |
409 | static int macvlan_init(struct net_device *dev) |
410 | { | |
411 | struct macvlan_dev *vlan = netdev_priv(dev); | |
412 | const struct net_device *lowerdev = vlan->lowerdev; | |
413 | ||
414 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
415 | (lowerdev->state & MACVLAN_STATE_MASK); | |
416 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8c2acc53 | 417 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 418 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 419 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 420 | |
c773e847 DM |
421 | macvlan_set_lockdep_class(dev); |
422 | ||
fccaf710 ED |
423 | vlan->rx_stats = alloc_percpu(struct macvlan_rx_stats); |
424 | if (!vlan->rx_stats) | |
425 | return -ENOMEM; | |
426 | ||
b863ceb7 PM |
427 | return 0; |
428 | } | |
429 | ||
fccaf710 ED |
430 | static void macvlan_uninit(struct net_device *dev) |
431 | { | |
432 | struct macvlan_dev *vlan = netdev_priv(dev); | |
433 | ||
434 | free_percpu(vlan->rx_stats); | |
435 | } | |
436 | ||
28172739 ED |
437 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
438 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 439 | { |
fccaf710 ED |
440 | struct macvlan_dev *vlan = netdev_priv(dev); |
441 | ||
3cfde79c | 442 | dev_txq_stats_fold(dev, stats); |
fccaf710 ED |
443 | |
444 | if (vlan->rx_stats) { | |
bc66154e ED |
445 | struct macvlan_rx_stats *p, accum = {0}; |
446 | u64 rx_packets, rx_bytes, rx_multicast; | |
447 | unsigned int start; | |
fccaf710 ED |
448 | int i; |
449 | ||
450 | for_each_possible_cpu(i) { | |
451 | p = per_cpu_ptr(vlan->rx_stats, i); | |
bc66154e ED |
452 | do { |
453 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
454 | rx_packets = p->rx_packets; | |
455 | rx_bytes = p->rx_bytes; | |
456 | rx_multicast = p->rx_multicast; | |
457 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); | |
458 | accum.rx_packets += rx_packets; | |
459 | accum.rx_bytes += rx_bytes; | |
460 | accum.rx_multicast += rx_multicast; | |
461 | /* rx_errors is an ulong, updated without syncp protection */ | |
462 | accum.rx_errors += p->rx_errors; | |
fccaf710 | 463 | } |
bc66154e ED |
464 | stats->rx_packets = accum.rx_packets; |
465 | stats->rx_bytes = accum.rx_bytes; | |
466 | stats->rx_errors = accum.rx_errors; | |
467 | stats->rx_dropped = accum.rx_errors; | |
468 | stats->multicast = accum.rx_multicast; | |
fccaf710 ED |
469 | } |
470 | return stats; | |
471 | } | |
472 | ||
b863ceb7 PM |
473 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
474 | struct ethtool_drvinfo *drvinfo) | |
475 | { | |
476 | snprintf(drvinfo->driver, 32, "macvlan"); | |
477 | snprintf(drvinfo->version, 32, "0.1"); | |
478 | } | |
479 | ||
480 | static u32 macvlan_ethtool_get_rx_csum(struct net_device *dev) | |
481 | { | |
482 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 483 | return dev_ethtool_get_rx_csum(vlan->lowerdev); |
b863ceb7 PM |
484 | } |
485 | ||
9edb8bb6 SH |
486 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
487 | struct ethtool_cmd *cmd) | |
488 | { | |
489 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 490 | return dev_ethtool_get_settings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
491 | } |
492 | ||
493 | static u32 macvlan_ethtool_get_flags(struct net_device *dev) | |
494 | { | |
495 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 496 | return dev_ethtool_get_flags(vlan->lowerdev); |
9edb8bb6 SH |
497 | } |
498 | ||
b863ceb7 PM |
499 | static const struct ethtool_ops macvlan_ethtool_ops = { |
500 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 501 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 | 502 | .get_rx_csum = macvlan_ethtool_get_rx_csum, |
b863ceb7 | 503 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
9edb8bb6 | 504 | .get_flags = macvlan_ethtool_get_flags, |
b863ceb7 PM |
505 | }; |
506 | ||
54a30c97 SH |
507 | static const struct net_device_ops macvlan_netdev_ops = { |
508 | .ndo_init = macvlan_init, | |
fccaf710 | 509 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
510 | .ndo_open = macvlan_open, |
511 | .ndo_stop = macvlan_stop, | |
00829823 | 512 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
513 | .ndo_change_mtu = macvlan_change_mtu, |
514 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
515 | .ndo_set_mac_address = macvlan_set_mac_address, | |
516 | .ndo_set_multicast_list = macvlan_set_multicast_list, | |
bc66154e | 517 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 SH |
518 | .ndo_validate_addr = eth_validate_addr, |
519 | }; | |
520 | ||
8a35747a | 521 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
522 | { |
523 | ether_setup(dev); | |
524 | ||
93f154b5 | 525 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
54a30c97 | 526 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 527 | dev->destructor = free_netdev; |
3b04ddde | 528 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 | 529 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
530 | } |
531 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
532 | ||
533 | static void macvlan_setup(struct net_device *dev) | |
534 | { | |
535 | macvlan_common_setup(dev); | |
b863ceb7 PM |
536 | dev->tx_queue_len = 0; |
537 | } | |
538 | ||
539 | static int macvlan_port_create(struct net_device *dev) | |
540 | { | |
541 | struct macvlan_port *port; | |
542 | unsigned int i; | |
ab95bfe0 | 543 | int err; |
b863ceb7 PM |
544 | |
545 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
546 | return -EINVAL; | |
547 | ||
548 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
549 | if (port == NULL) | |
550 | return -ENOMEM; | |
551 | ||
552 | port->dev = dev; | |
553 | INIT_LIST_HEAD(&port->vlans); | |
554 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
555 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 556 | |
a35e2c1b JP |
557 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
558 | if (err) | |
ab95bfe0 | 559 | kfree(port); |
ab95bfe0 | 560 | |
a35e2c1b | 561 | dev->priv_flags |= IFF_MACVLAN_PORT; |
ab95bfe0 | 562 | return err; |
b863ceb7 PM |
563 | } |
564 | ||
8b37ef0a JP |
565 | static void macvlan_port_rcu_free(struct rcu_head *head) |
566 | { | |
567 | struct macvlan_port *port; | |
568 | ||
569 | port = container_of(head, struct macvlan_port, rcu); | |
570 | kfree(port); | |
571 | } | |
572 | ||
b863ceb7 PM |
573 | static void macvlan_port_destroy(struct net_device *dev) |
574 | { | |
a35e2c1b | 575 | struct macvlan_port *port = macvlan_port_get(dev); |
b863ceb7 | 576 | |
a35e2c1b | 577 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 578 | netdev_rx_handler_unregister(dev); |
8b37ef0a | 579 | call_rcu(&port->rcu, macvlan_port_rcu_free); |
b863ceb7 PM |
580 | } |
581 | ||
b863ceb7 PM |
582 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
583 | { | |
584 | if (tb[IFLA_ADDRESS]) { | |
585 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
586 | return -EINVAL; | |
587 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
588 | return -EADDRNOTAVAIL; | |
589 | } | |
27c0b1a8 AB |
590 | |
591 | if (data && data[IFLA_MACVLAN_MODE]) { | |
592 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
593 | case MACVLAN_MODE_PRIVATE: | |
594 | case MACVLAN_MODE_VEPA: | |
595 | case MACVLAN_MODE_BRIDGE: | |
596 | break; | |
597 | default: | |
598 | return -EINVAL; | |
599 | } | |
600 | } | |
b863ceb7 PM |
601 | return 0; |
602 | } | |
603 | ||
2c114553 ED |
604 | static int macvlan_get_tx_queues(struct net *net, |
605 | struct nlattr *tb[], | |
606 | unsigned int *num_tx_queues, | |
607 | unsigned int *real_num_tx_queues) | |
608 | { | |
609 | struct net_device *real_dev; | |
610 | ||
611 | if (!tb[IFLA_LINK]) | |
612 | return -EINVAL; | |
613 | ||
614 | real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK])); | |
615 | if (!real_dev) | |
616 | return -ENODEV; | |
617 | ||
618 | *num_tx_queues = real_dev->num_tx_queues; | |
619 | *real_num_tx_queues = real_dev->real_num_tx_queues; | |
620 | return 0; | |
621 | } | |
622 | ||
fc0663d6 AB |
623 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
624 | struct nlattr *tb[], struct nlattr *data[], | |
625 | int (*receive)(struct sk_buff *skb), | |
626 | int (*forward)(struct net_device *dev, | |
627 | struct sk_buff *skb)) | |
b863ceb7 PM |
628 | { |
629 | struct macvlan_dev *vlan = netdev_priv(dev); | |
630 | struct macvlan_port *port; | |
631 | struct net_device *lowerdev; | |
632 | int err; | |
633 | ||
634 | if (!tb[IFLA_LINK]) | |
635 | return -EINVAL; | |
636 | ||
81adee47 | 637 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
638 | if (lowerdev == NULL) |
639 | return -ENODEV; | |
640 | ||
b0832a29 EB |
641 | /* When creating macvlans on top of other macvlans - use |
642 | * the real device as the lowerdev. | |
a6ca5f1d | 643 | */ |
b0832a29 EB |
644 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
645 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
646 | lowerdev = lowervlan->lowerdev; | |
647 | } | |
a6ca5f1d | 648 | |
b863ceb7 PM |
649 | if (!tb[IFLA_MTU]) |
650 | dev->mtu = lowerdev->mtu; | |
651 | else if (dev->mtu > lowerdev->mtu) | |
652 | return -EINVAL; | |
653 | ||
654 | if (!tb[IFLA_ADDRESS]) | |
655 | random_ether_addr(dev->dev_addr); | |
656 | ||
a35e2c1b | 657 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
658 | err = macvlan_port_create(lowerdev); |
659 | if (err < 0) | |
660 | return err; | |
661 | } | |
a35e2c1b | 662 | port = macvlan_port_get(lowerdev); |
b863ceb7 PM |
663 | |
664 | vlan->lowerdev = lowerdev; | |
665 | vlan->dev = dev; | |
666 | vlan->port = port; | |
fc0663d6 AB |
667 | vlan->receive = receive; |
668 | vlan->forward = forward; | |
b863ceb7 | 669 | |
27c0b1a8 AB |
670 | vlan->mode = MACVLAN_MODE_VEPA; |
671 | if (data && data[IFLA_MACVLAN_MODE]) | |
672 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
673 | ||
b863ceb7 PM |
674 | err = register_netdevice(dev); |
675 | if (err < 0) | |
f16d3d57 | 676 | goto destroy_port; |
b863ceb7 PM |
677 | |
678 | list_add_tail(&vlan->list, &port->vlans); | |
fc4a7489 | 679 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 680 | |
b863ceb7 | 681 | return 0; |
f16d3d57 JP |
682 | |
683 | destroy_port: | |
684 | if (list_empty(&port->vlans)) | |
685 | macvlan_port_destroy(lowerdev); | |
686 | ||
687 | return err; | |
b863ceb7 | 688 | } |
fc0663d6 | 689 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 690 | |
fc0663d6 AB |
691 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
692 | struct nlattr *tb[], struct nlattr *data[]) | |
693 | { | |
694 | return macvlan_common_newlink(src_net, dev, tb, data, | |
695 | netif_rx, | |
696 | dev_forward_skb); | |
697 | } | |
698 | ||
699 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
700 | { |
701 | struct macvlan_dev *vlan = netdev_priv(dev); | |
702 | struct macvlan_port *port = vlan->port; | |
703 | ||
704 | list_del(&vlan->list); | |
23289a37 | 705 | unregister_netdevice_queue(dev, head); |
b863ceb7 PM |
706 | |
707 | if (list_empty(&port->vlans)) | |
73120964 | 708 | macvlan_port_destroy(port->dev); |
b863ceb7 | 709 | } |
fc0663d6 | 710 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 711 | |
27c0b1a8 AB |
712 | static int macvlan_changelink(struct net_device *dev, |
713 | struct nlattr *tb[], struct nlattr *data[]) | |
714 | { | |
715 | struct macvlan_dev *vlan = netdev_priv(dev); | |
716 | if (data && data[IFLA_MACVLAN_MODE]) | |
717 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
718 | return 0; | |
719 | } | |
720 | ||
721 | static size_t macvlan_get_size(const struct net_device *dev) | |
722 | { | |
723 | return nla_total_size(4); | |
724 | } | |
725 | ||
726 | static int macvlan_fill_info(struct sk_buff *skb, | |
727 | const struct net_device *dev) | |
728 | { | |
729 | struct macvlan_dev *vlan = netdev_priv(dev); | |
730 | ||
731 | NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); | |
732 | return 0; | |
733 | ||
734 | nla_put_failure: | |
735 | return -EMSGSIZE; | |
736 | } | |
737 | ||
738 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
739 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, | |
740 | }; | |
741 | ||
fc0663d6 AB |
742 | int macvlan_link_register(struct rtnl_link_ops *ops) |
743 | { | |
744 | /* common fields */ | |
745 | ops->priv_size = sizeof(struct macvlan_dev); | |
746 | ops->get_tx_queues = macvlan_get_tx_queues; | |
fc0663d6 AB |
747 | ops->validate = macvlan_validate; |
748 | ops->maxtype = IFLA_MACVLAN_MAX; | |
749 | ops->policy = macvlan_policy; | |
750 | ops->changelink = macvlan_changelink; | |
751 | ops->get_size = macvlan_get_size; | |
752 | ops->fill_info = macvlan_fill_info; | |
753 | ||
754 | return rtnl_link_register(ops); | |
755 | }; | |
756 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
757 | ||
758 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 759 | .kind = "macvlan", |
8a35747a | 760 | .setup = macvlan_setup, |
b863ceb7 PM |
761 | .newlink = macvlan_newlink, |
762 | .dellink = macvlan_dellink, | |
763 | }; | |
764 | ||
765 | static int macvlan_device_event(struct notifier_block *unused, | |
766 | unsigned long event, void *ptr) | |
767 | { | |
768 | struct net_device *dev = ptr; | |
769 | struct macvlan_dev *vlan, *next; | |
770 | struct macvlan_port *port; | |
771 | ||
a35e2c1b | 772 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
773 | return NOTIFY_DONE; |
774 | ||
a35e2c1b JP |
775 | port = macvlan_port_get(dev); |
776 | ||
b863ceb7 PM |
777 | switch (event) { |
778 | case NETDEV_CHANGE: | |
779 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
780 | netif_stacked_transfer_operstate(vlan->lowerdev, |
781 | vlan->dev); | |
b863ceb7 PM |
782 | break; |
783 | case NETDEV_FEAT_CHANGE: | |
784 | list_for_each_entry(vlan, &port->vlans, list) { | |
785 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 786 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
787 | netdev_features_change(vlan->dev); |
788 | } | |
789 | break; | |
790 | case NETDEV_UNREGISTER: | |
791 | list_for_each_entry_safe(vlan, next, &port->vlans, list) | |
fc0663d6 | 792 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, NULL); |
b863ceb7 | 793 | break; |
1c01fe14 JP |
794 | case NETDEV_PRE_TYPE_CHANGE: |
795 | /* Forbid underlaying device to change its type. */ | |
796 | return NOTIFY_BAD; | |
b863ceb7 PM |
797 | } |
798 | return NOTIFY_DONE; | |
799 | } | |
800 | ||
801 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
802 | .notifier_call = macvlan_device_event, | |
803 | }; | |
804 | ||
805 | static int __init macvlan_init_module(void) | |
806 | { | |
807 | int err; | |
808 | ||
809 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 810 | |
fc0663d6 | 811 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
812 | if (err < 0) |
813 | goto err1; | |
814 | return 0; | |
815 | err1: | |
b863ceb7 PM |
816 | unregister_netdevice_notifier(&macvlan_notifier_block); |
817 | return err; | |
818 | } | |
819 | ||
820 | static void __exit macvlan_cleanup_module(void) | |
821 | { | |
822 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
823 | unregister_netdevice_notifier(&macvlan_notifier_block); |
824 | } | |
825 | ||
826 | module_init(macvlan_init_module); | |
827 | module_exit(macvlan_cleanup_module); | |
828 | ||
829 | MODULE_LICENSE("GPL"); | |
830 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
831 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
832 | MODULE_ALIAS_RTNL_LINK("macvlan"); |