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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 | { |
b863ceb7 PM |
246 | unsigned int len = skb->len; |
247 | int ret; | |
8ffab51b | 248 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 249 | |
618e1b74 | 250 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 251 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
8ffab51b | 252 | struct macvlan_pcpu_stats *pcpu_stats; |
2c114553 | 253 | |
8ffab51b ED |
254 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
255 | u64_stats_update_begin(&pcpu_stats->syncp); | |
256 | pcpu_stats->tx_packets++; | |
257 | pcpu_stats->tx_bytes += len; | |
258 | u64_stats_update_end(&pcpu_stats->syncp); | |
259 | } else { | |
260 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
261 | } | |
cbbef5e1 | 262 | return ret; |
b863ceb7 | 263 | } |
fc0663d6 | 264 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
265 | |
266 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
267 | unsigned short type, const void *daddr, |
268 | const void *saddr, unsigned len) | |
b863ceb7 PM |
269 | { |
270 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
271 | struct net_device *lowerdev = vlan->lowerdev; | |
272 | ||
0c4e8581 SH |
273 | return dev_hard_header(skb, lowerdev, type, daddr, |
274 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
275 | } |
276 | ||
3b04ddde SH |
277 | static const struct header_ops macvlan_hard_header_ops = { |
278 | .create = macvlan_hard_header, | |
279 | .rebuild = eth_rebuild_header, | |
280 | .parse = eth_header_parse, | |
3b04ddde SH |
281 | .cache = eth_header_cache, |
282 | .cache_update = eth_header_cache_update, | |
283 | }; | |
284 | ||
b863ceb7 PM |
285 | static int macvlan_open(struct net_device *dev) |
286 | { | |
287 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
288 | struct net_device *lowerdev = vlan->lowerdev; |
289 | int err; | |
290 | ||
f9ac30f0 EB |
291 | err = -EBUSY; |
292 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
293 | goto out; | |
294 | ||
a748ee24 | 295 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 296 | if (err < 0) |
b89fb7da WC |
297 | goto out; |
298 | if (dev->flags & IFF_ALLMULTI) { | |
299 | err = dev_set_allmulti(lowerdev, 1); | |
300 | if (err < 0) | |
301 | goto del_unicast; | |
302 | } | |
f9ac30f0 | 303 | macvlan_hash_add(vlan); |
b863ceb7 | 304 | return 0; |
b89fb7da WC |
305 | |
306 | del_unicast: | |
a748ee24 | 307 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
308 | out: |
309 | return err; | |
b863ceb7 PM |
310 | } |
311 | ||
312 | static int macvlan_stop(struct net_device *dev) | |
313 | { | |
314 | struct macvlan_dev *vlan = netdev_priv(dev); | |
315 | struct net_device *lowerdev = vlan->lowerdev; | |
316 | ||
317 | dev_mc_unsync(lowerdev, dev); | |
318 | if (dev->flags & IFF_ALLMULTI) | |
319 | dev_set_allmulti(lowerdev, -1); | |
320 | ||
a748ee24 | 321 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 322 | |
f9ac30f0 | 323 | macvlan_hash_del(vlan); |
b863ceb7 PM |
324 | return 0; |
325 | } | |
326 | ||
ad5d20a6 PM |
327 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
328 | { | |
329 | struct macvlan_dev *vlan = netdev_priv(dev); | |
330 | struct net_device *lowerdev = vlan->lowerdev; | |
331 | struct sockaddr *addr = p; | |
332 | int err; | |
333 | ||
334 | if (!is_valid_ether_addr(addr->sa_data)) | |
335 | return -EADDRNOTAVAIL; | |
336 | ||
f9ac30f0 EB |
337 | if (!(dev->flags & IFF_UP)) { |
338 | /* Just copy in the new address */ | |
339 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
340 | } else { | |
341 | /* Rehash and update the device filters */ | |
342 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
343 | return -EBUSY; | |
ad5d20a6 | 344 | |
a748ee24 | 345 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 346 | if (err) |
f9ac30f0 | 347 | return err; |
ad5d20a6 | 348 | |
a748ee24 | 349 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
350 | |
351 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
352 | } | |
ad5d20a6 PM |
353 | return 0; |
354 | } | |
355 | ||
b863ceb7 PM |
356 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
357 | { | |
358 | struct macvlan_dev *vlan = netdev_priv(dev); | |
359 | struct net_device *lowerdev = vlan->lowerdev; | |
360 | ||
361 | if (change & IFF_ALLMULTI) | |
362 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
363 | } | |
364 | ||
365 | static void macvlan_set_multicast_list(struct net_device *dev) | |
366 | { | |
367 | struct macvlan_dev *vlan = netdev_priv(dev); | |
368 | ||
369 | dev_mc_sync(vlan->lowerdev, dev); | |
370 | } | |
371 | ||
372 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
373 | { | |
374 | struct macvlan_dev *vlan = netdev_priv(dev); | |
375 | ||
376 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
377 | return -EINVAL; | |
378 | dev->mtu = new_mtu; | |
379 | return 0; | |
380 | } | |
381 | ||
382 | /* | |
383 | * macvlan network devices have devices nesting below it and are a special | |
384 | * "super class" of normal network devices; split their locks off into a | |
385 | * separate class since they always nest. | |
386 | */ | |
387 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 388 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
389 | |
390 | #define MACVLAN_FEATURES \ | |
391 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
392 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
6eb3a855 | 393 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO) |
b863ceb7 PM |
394 | |
395 | #define MACVLAN_STATE_MASK \ | |
396 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
397 | ||
e8a0464c DM |
398 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
399 | struct netdev_queue *txq, | |
400 | void *_unused) | |
c773e847 DM |
401 | { |
402 | lockdep_set_class(&txq->_xmit_lock, | |
403 | &macvlan_netdev_xmit_lock_key); | |
404 | } | |
405 | ||
406 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
407 | { | |
cf508b12 DM |
408 | lockdep_set_class(&dev->addr_list_lock, |
409 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 410 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
411 | } |
412 | ||
b863ceb7 PM |
413 | static int macvlan_init(struct net_device *dev) |
414 | { | |
415 | struct macvlan_dev *vlan = netdev_priv(dev); | |
416 | const struct net_device *lowerdev = vlan->lowerdev; | |
417 | ||
418 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
419 | (lowerdev->state & MACVLAN_STATE_MASK); | |
420 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8ffab51b | 421 | dev->features |= NETIF_F_LLTX; |
8c2acc53 | 422 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 423 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 424 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 425 | |
c773e847 DM |
426 | macvlan_set_lockdep_class(dev); |
427 | ||
8ffab51b ED |
428 | vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); |
429 | if (!vlan->pcpu_stats) | |
fccaf710 ED |
430 | return -ENOMEM; |
431 | ||
b863ceb7 PM |
432 | return 0; |
433 | } | |
434 | ||
fccaf710 ED |
435 | static void macvlan_uninit(struct net_device *dev) |
436 | { | |
437 | struct macvlan_dev *vlan = netdev_priv(dev); | |
438 | ||
8ffab51b | 439 | free_percpu(vlan->pcpu_stats); |
fccaf710 ED |
440 | } |
441 | ||
28172739 ED |
442 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
443 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 444 | { |
fccaf710 ED |
445 | struct macvlan_dev *vlan = netdev_priv(dev); |
446 | ||
8ffab51b ED |
447 | if (vlan->pcpu_stats) { |
448 | struct macvlan_pcpu_stats *p; | |
449 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
450 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 451 | unsigned int start; |
fccaf710 ED |
452 | int i; |
453 | ||
454 | for_each_possible_cpu(i) { | |
8ffab51b | 455 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e ED |
456 | do { |
457 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
458 | rx_packets = p->rx_packets; | |
459 | rx_bytes = p->rx_bytes; | |
460 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
461 | tx_packets = p->tx_packets; |
462 | tx_bytes = p->tx_bytes; | |
bc66154e | 463 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
8ffab51b ED |
464 | |
465 | stats->rx_packets += rx_packets; | |
466 | stats->rx_bytes += rx_bytes; | |
467 | stats->multicast += rx_multicast; | |
468 | stats->tx_packets += tx_packets; | |
469 | stats->tx_bytes += tx_bytes; | |
470 | /* rx_errors & tx_dropped are u32, updated | |
471 | * without syncp protection. | |
472 | */ | |
473 | rx_errors += p->rx_errors; | |
474 | tx_dropped += p->tx_dropped; | |
fccaf710 | 475 | } |
8ffab51b ED |
476 | stats->rx_errors = rx_errors; |
477 | stats->rx_dropped = rx_errors; | |
478 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
479 | } |
480 | return stats; | |
481 | } | |
482 | ||
b863ceb7 PM |
483 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
484 | struct ethtool_drvinfo *drvinfo) | |
485 | { | |
486 | snprintf(drvinfo->driver, 32, "macvlan"); | |
487 | snprintf(drvinfo->version, 32, "0.1"); | |
488 | } | |
489 | ||
490 | static u32 macvlan_ethtool_get_rx_csum(struct net_device *dev) | |
491 | { | |
492 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 493 | return dev_ethtool_get_rx_csum(vlan->lowerdev); |
b863ceb7 PM |
494 | } |
495 | ||
9edb8bb6 SH |
496 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
497 | struct ethtool_cmd *cmd) | |
498 | { | |
499 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 500 | return dev_ethtool_get_settings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
501 | } |
502 | ||
503 | static u32 macvlan_ethtool_get_flags(struct net_device *dev) | |
504 | { | |
505 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 506 | return dev_ethtool_get_flags(vlan->lowerdev); |
9edb8bb6 SH |
507 | } |
508 | ||
b863ceb7 PM |
509 | static const struct ethtool_ops macvlan_ethtool_ops = { |
510 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 511 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 | 512 | .get_rx_csum = macvlan_ethtool_get_rx_csum, |
b863ceb7 | 513 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
9edb8bb6 | 514 | .get_flags = macvlan_ethtool_get_flags, |
b863ceb7 PM |
515 | }; |
516 | ||
54a30c97 SH |
517 | static const struct net_device_ops macvlan_netdev_ops = { |
518 | .ndo_init = macvlan_init, | |
fccaf710 | 519 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
520 | .ndo_open = macvlan_open, |
521 | .ndo_stop = macvlan_stop, | |
00829823 | 522 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
523 | .ndo_change_mtu = macvlan_change_mtu, |
524 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
525 | .ndo_set_mac_address = macvlan_set_mac_address, | |
526 | .ndo_set_multicast_list = macvlan_set_multicast_list, | |
bc66154e | 527 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 SH |
528 | .ndo_validate_addr = eth_validate_addr, |
529 | }; | |
530 | ||
8a35747a | 531 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
532 | { |
533 | ether_setup(dev); | |
534 | ||
93f154b5 | 535 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
54a30c97 | 536 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 537 | dev->destructor = free_netdev; |
3b04ddde | 538 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 | 539 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
540 | } |
541 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
542 | ||
543 | static void macvlan_setup(struct net_device *dev) | |
544 | { | |
545 | macvlan_common_setup(dev); | |
b863ceb7 PM |
546 | dev->tx_queue_len = 0; |
547 | } | |
548 | ||
549 | static int macvlan_port_create(struct net_device *dev) | |
550 | { | |
551 | struct macvlan_port *port; | |
552 | unsigned int i; | |
ab95bfe0 | 553 | int err; |
b863ceb7 PM |
554 | |
555 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
556 | return -EINVAL; | |
557 | ||
558 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
559 | if (port == NULL) | |
560 | return -ENOMEM; | |
561 | ||
562 | port->dev = dev; | |
563 | INIT_LIST_HEAD(&port->vlans); | |
564 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
565 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 566 | |
a35e2c1b JP |
567 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
568 | if (err) | |
ab95bfe0 | 569 | kfree(port); |
ab95bfe0 | 570 | |
a35e2c1b | 571 | dev->priv_flags |= IFF_MACVLAN_PORT; |
ab95bfe0 | 572 | return err; |
b863ceb7 PM |
573 | } |
574 | ||
8b37ef0a JP |
575 | static void macvlan_port_rcu_free(struct rcu_head *head) |
576 | { | |
577 | struct macvlan_port *port; | |
578 | ||
579 | port = container_of(head, struct macvlan_port, rcu); | |
580 | kfree(port); | |
581 | } | |
582 | ||
b863ceb7 PM |
583 | static void macvlan_port_destroy(struct net_device *dev) |
584 | { | |
a35e2c1b | 585 | struct macvlan_port *port = macvlan_port_get(dev); |
b863ceb7 | 586 | |
a35e2c1b | 587 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 588 | netdev_rx_handler_unregister(dev); |
8b37ef0a | 589 | call_rcu(&port->rcu, macvlan_port_rcu_free); |
b863ceb7 PM |
590 | } |
591 | ||
b863ceb7 PM |
592 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
593 | { | |
594 | if (tb[IFLA_ADDRESS]) { | |
595 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
596 | return -EINVAL; | |
597 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
598 | return -EADDRNOTAVAIL; | |
599 | } | |
27c0b1a8 AB |
600 | |
601 | if (data && data[IFLA_MACVLAN_MODE]) { | |
602 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
603 | case MACVLAN_MODE_PRIVATE: | |
604 | case MACVLAN_MODE_VEPA: | |
605 | case MACVLAN_MODE_BRIDGE: | |
606 | break; | |
607 | default: | |
608 | return -EINVAL; | |
609 | } | |
610 | } | |
b863ceb7 PM |
611 | return 0; |
612 | } | |
613 | ||
fc0663d6 AB |
614 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
615 | struct nlattr *tb[], struct nlattr *data[], | |
616 | int (*receive)(struct sk_buff *skb), | |
617 | int (*forward)(struct net_device *dev, | |
618 | struct sk_buff *skb)) | |
b863ceb7 PM |
619 | { |
620 | struct macvlan_dev *vlan = netdev_priv(dev); | |
621 | struct macvlan_port *port; | |
622 | struct net_device *lowerdev; | |
623 | int err; | |
624 | ||
625 | if (!tb[IFLA_LINK]) | |
626 | return -EINVAL; | |
627 | ||
81adee47 | 628 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
629 | if (lowerdev == NULL) |
630 | return -ENODEV; | |
631 | ||
b0832a29 EB |
632 | /* When creating macvlans on top of other macvlans - use |
633 | * the real device as the lowerdev. | |
a6ca5f1d | 634 | */ |
b0832a29 EB |
635 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
636 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
637 | lowerdev = lowervlan->lowerdev; | |
638 | } | |
a6ca5f1d | 639 | |
b863ceb7 PM |
640 | if (!tb[IFLA_MTU]) |
641 | dev->mtu = lowerdev->mtu; | |
642 | else if (dev->mtu > lowerdev->mtu) | |
643 | return -EINVAL; | |
644 | ||
645 | if (!tb[IFLA_ADDRESS]) | |
646 | random_ether_addr(dev->dev_addr); | |
647 | ||
a35e2c1b | 648 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
649 | err = macvlan_port_create(lowerdev); |
650 | if (err < 0) | |
651 | return err; | |
652 | } | |
a35e2c1b | 653 | port = macvlan_port_get(lowerdev); |
b863ceb7 PM |
654 | |
655 | vlan->lowerdev = lowerdev; | |
656 | vlan->dev = dev; | |
657 | vlan->port = port; | |
fc0663d6 AB |
658 | vlan->receive = receive; |
659 | vlan->forward = forward; | |
b863ceb7 | 660 | |
27c0b1a8 AB |
661 | vlan->mode = MACVLAN_MODE_VEPA; |
662 | if (data && data[IFLA_MACVLAN_MODE]) | |
663 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
664 | ||
b863ceb7 PM |
665 | err = register_netdevice(dev); |
666 | if (err < 0) | |
f16d3d57 | 667 | goto destroy_port; |
b863ceb7 PM |
668 | |
669 | list_add_tail(&vlan->list, &port->vlans); | |
fc4a7489 | 670 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 671 | |
b863ceb7 | 672 | return 0; |
f16d3d57 JP |
673 | |
674 | destroy_port: | |
675 | if (list_empty(&port->vlans)) | |
676 | macvlan_port_destroy(lowerdev); | |
677 | ||
678 | return err; | |
b863ceb7 | 679 | } |
fc0663d6 | 680 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 681 | |
fc0663d6 AB |
682 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
683 | struct nlattr *tb[], struct nlattr *data[]) | |
684 | { | |
685 | return macvlan_common_newlink(src_net, dev, tb, data, | |
686 | netif_rx, | |
687 | dev_forward_skb); | |
688 | } | |
689 | ||
690 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
691 | { |
692 | struct macvlan_dev *vlan = netdev_priv(dev); | |
693 | struct macvlan_port *port = vlan->port; | |
694 | ||
695 | list_del(&vlan->list); | |
23289a37 | 696 | unregister_netdevice_queue(dev, head); |
b863ceb7 PM |
697 | |
698 | if (list_empty(&port->vlans)) | |
73120964 | 699 | macvlan_port_destroy(port->dev); |
b863ceb7 | 700 | } |
fc0663d6 | 701 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 702 | |
27c0b1a8 AB |
703 | static int macvlan_changelink(struct net_device *dev, |
704 | struct nlattr *tb[], struct nlattr *data[]) | |
705 | { | |
706 | struct macvlan_dev *vlan = netdev_priv(dev); | |
707 | if (data && data[IFLA_MACVLAN_MODE]) | |
708 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
709 | return 0; | |
710 | } | |
711 | ||
712 | static size_t macvlan_get_size(const struct net_device *dev) | |
713 | { | |
714 | return nla_total_size(4); | |
715 | } | |
716 | ||
717 | static int macvlan_fill_info(struct sk_buff *skb, | |
718 | const struct net_device *dev) | |
719 | { | |
720 | struct macvlan_dev *vlan = netdev_priv(dev); | |
721 | ||
722 | NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); | |
723 | return 0; | |
724 | ||
725 | nla_put_failure: | |
726 | return -EMSGSIZE; | |
727 | } | |
728 | ||
729 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
730 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, | |
731 | }; | |
732 | ||
fc0663d6 AB |
733 | int macvlan_link_register(struct rtnl_link_ops *ops) |
734 | { | |
735 | /* common fields */ | |
736 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
737 | ops->validate = macvlan_validate; |
738 | ops->maxtype = IFLA_MACVLAN_MAX; | |
739 | ops->policy = macvlan_policy; | |
740 | ops->changelink = macvlan_changelink; | |
741 | ops->get_size = macvlan_get_size; | |
742 | ops->fill_info = macvlan_fill_info; | |
743 | ||
744 | return rtnl_link_register(ops); | |
745 | }; | |
746 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
747 | ||
748 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 749 | .kind = "macvlan", |
8a35747a | 750 | .setup = macvlan_setup, |
b863ceb7 PM |
751 | .newlink = macvlan_newlink, |
752 | .dellink = macvlan_dellink, | |
753 | }; | |
754 | ||
755 | static int macvlan_device_event(struct notifier_block *unused, | |
756 | unsigned long event, void *ptr) | |
757 | { | |
758 | struct net_device *dev = ptr; | |
759 | struct macvlan_dev *vlan, *next; | |
760 | struct macvlan_port *port; | |
761 | ||
a35e2c1b | 762 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
763 | return NOTIFY_DONE; |
764 | ||
a35e2c1b JP |
765 | port = macvlan_port_get(dev); |
766 | ||
b863ceb7 PM |
767 | switch (event) { |
768 | case NETDEV_CHANGE: | |
769 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
770 | netif_stacked_transfer_operstate(vlan->lowerdev, |
771 | vlan->dev); | |
b863ceb7 PM |
772 | break; |
773 | case NETDEV_FEAT_CHANGE: | |
774 | list_for_each_entry(vlan, &port->vlans, list) { | |
775 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 776 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
777 | netdev_features_change(vlan->dev); |
778 | } | |
779 | break; | |
780 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
781 | /* twiddle thumbs on netns device moves */ |
782 | if (dev->reg_state != NETREG_UNREGISTERING) | |
783 | break; | |
784 | ||
b863ceb7 | 785 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
fc0663d6 | 786 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, NULL); |
b863ceb7 | 787 | break; |
1c01fe14 JP |
788 | case NETDEV_PRE_TYPE_CHANGE: |
789 | /* Forbid underlaying device to change its type. */ | |
790 | return NOTIFY_BAD; | |
b863ceb7 PM |
791 | } |
792 | return NOTIFY_DONE; | |
793 | } | |
794 | ||
795 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
796 | .notifier_call = macvlan_device_event, | |
797 | }; | |
798 | ||
799 | static int __init macvlan_init_module(void) | |
800 | { | |
801 | int err; | |
802 | ||
803 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 804 | |
fc0663d6 | 805 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
806 | if (err < 0) |
807 | goto err1; | |
808 | return 0; | |
809 | err1: | |
b863ceb7 PM |
810 | unregister_netdevice_notifier(&macvlan_notifier_block); |
811 | return err; | |
812 | } | |
813 | ||
814 | static void __exit macvlan_cleanup_module(void) | |
815 | { | |
816 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
817 | unregister_netdevice_notifier(&macvlan_notifier_block); |
818 | } | |
819 | ||
820 | module_init(macvlan_init_module); | |
821 | module_exit(macvlan_cleanup_module); | |
822 | ||
823 | MODULE_LICENSE("GPL"); | |
824 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
825 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
826 | MODULE_ALIAS_RTNL_LINK("macvlan"); |