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; |
eb06acdc | 41 | bool passthru; |
b863ceb7 PM |
42 | }; |
43 | ||
a35e2c1b JP |
44 | #define macvlan_port_get_rcu(dev) \ |
45 | ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data)) | |
46 | #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data) | |
47 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) | |
48 | ||
b863ceb7 PM |
49 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
50 | const unsigned char *addr) | |
51 | { | |
52 | struct macvlan_dev *vlan; | |
53 | struct hlist_node *n; | |
54 | ||
55 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { | |
ac06713d | 56 | if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
57 | return vlan; |
58 | } | |
59 | return NULL; | |
60 | } | |
61 | ||
f9ac30f0 EB |
62 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
63 | { | |
64 | struct macvlan_port *port = vlan->port; | |
65 | const unsigned char *addr = vlan->dev->dev_addr; | |
66 | ||
67 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
68 | } | |
69 | ||
70 | static void macvlan_hash_del(struct macvlan_dev *vlan) | |
71 | { | |
72 | hlist_del_rcu(&vlan->hlist); | |
73 | synchronize_rcu(); | |
74 | } | |
75 | ||
76 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
77 | const unsigned char *addr) | |
78 | { | |
79 | macvlan_hash_del(vlan); | |
80 | /* Now that we are unhashed it is safe to change the device | |
81 | * address without confusing packet delivery. | |
82 | */ | |
83 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
84 | macvlan_hash_add(vlan); | |
85 | } | |
86 | ||
87 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
88 | const unsigned char *addr) | |
89 | { | |
90 | /* Test to see if the specified multicast address is | |
91 | * currently in use by the underlying device or | |
92 | * another macvlan. | |
93 | */ | |
ac06713d | 94 | if (!compare_ether_addr_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
95 | return 1; |
96 | ||
97 | if (macvlan_hash_lookup(port, addr)) | |
98 | return 1; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
a1e514c5 | 103 | |
fc0663d6 AB |
104 | static int macvlan_broadcast_one(struct sk_buff *skb, |
105 | const struct macvlan_dev *vlan, | |
618e1b74 | 106 | const struct ethhdr *eth, bool local) |
a1e514c5 | 107 | { |
fc0663d6 | 108 | struct net_device *dev = vlan->dev; |
a1e514c5 AB |
109 | if (!skb) |
110 | return NET_RX_DROP; | |
111 | ||
618e1b74 | 112 | if (local) |
fc0663d6 | 113 | return vlan->forward(dev, skb); |
618e1b74 | 114 | |
a1e514c5 AB |
115 | skb->dev = dev; |
116 | if (!compare_ether_addr_64bits(eth->h_dest, | |
117 | dev->broadcast)) | |
118 | skb->pkt_type = PACKET_BROADCAST; | |
119 | else | |
120 | skb->pkt_type = PACKET_MULTICAST; | |
121 | ||
fc0663d6 | 122 | return vlan->receive(skb); |
a1e514c5 AB |
123 | } |
124 | ||
b863ceb7 | 125 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
126 | const struct macvlan_port *port, |
127 | struct net_device *src, | |
128 | enum macvlan_mode mode) | |
b863ceb7 PM |
129 | { |
130 | const struct ethhdr *eth = eth_hdr(skb); | |
131 | const struct macvlan_dev *vlan; | |
132 | struct hlist_node *n; | |
b863ceb7 PM |
133 | struct sk_buff *nskb; |
134 | unsigned int i; | |
a1e514c5 | 135 | int err; |
b863ceb7 | 136 | |
efbbced3 PM |
137 | if (skb->protocol == htons(ETH_P_PAUSE)) |
138 | return; | |
139 | ||
b863ceb7 PM |
140 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
141 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { | |
618e1b74 AB |
142 | if (vlan->dev == src || !(vlan->mode & mode)) |
143 | continue; | |
144 | ||
b863ceb7 | 145 | nskb = skb_clone(skb, GFP_ATOMIC); |
fc0663d6 | 146 | err = macvlan_broadcast_one(nskb, vlan, eth, |
618e1b74 | 147 | mode == MACVLAN_MODE_BRIDGE); |
a1e514c5 AB |
148 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
149 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
150 | } |
151 | } | |
152 | } | |
153 | ||
154 | /* called under rcu_read_lock() from netif_receive_skb */ | |
ab95bfe0 | 155 | static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb) |
b863ceb7 | 156 | { |
ab95bfe0 | 157 | struct macvlan_port *port; |
b863ceb7 | 158 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 159 | const struct macvlan_dev *vlan; |
618e1b74 | 160 | const struct macvlan_dev *src; |
b863ceb7 | 161 | struct net_device *dev; |
ba01877f SS |
162 | unsigned int len = 0; |
163 | int ret = NET_RX_DROP; | |
b863ceb7 | 164 | |
a35e2c1b | 165 | port = macvlan_port_get_rcu(skb->dev); |
b863ceb7 | 166 | if (is_multicast_ether_addr(eth->h_dest)) { |
618e1b74 AB |
167 | src = macvlan_hash_lookup(port, eth->h_source); |
168 | if (!src) | |
169 | /* frame comes from an external address */ | |
170 | macvlan_broadcast(skb, port, NULL, | |
171 | MACVLAN_MODE_PRIVATE | | |
172 | MACVLAN_MODE_VEPA | | |
eb06acdc | 173 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
174 | MACVLAN_MODE_BRIDGE); |
175 | else if (src->mode == MACVLAN_MODE_VEPA) | |
176 | /* flood to everyone except source */ | |
177 | macvlan_broadcast(skb, port, src->dev, | |
178 | MACVLAN_MODE_VEPA | | |
179 | MACVLAN_MODE_BRIDGE); | |
180 | else if (src->mode == MACVLAN_MODE_BRIDGE) | |
181 | /* | |
182 | * flood only to VEPA ports, bridge ports | |
183 | * already saw the frame on the way out. | |
184 | */ | |
185 | macvlan_broadcast(skb, port, src->dev, | |
186 | MACVLAN_MODE_VEPA); | |
b863ceb7 PM |
187 | return skb; |
188 | } | |
189 | ||
eb06acdc SS |
190 | if (port->passthru) |
191 | vlan = list_first_entry(&port->vlans, struct macvlan_dev, list); | |
192 | else | |
193 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 PM |
194 | if (vlan == NULL) |
195 | return skb; | |
196 | ||
197 | dev = vlan->dev; | |
198 | if (unlikely(!(dev->flags & IFF_UP))) { | |
199 | kfree_skb(skb); | |
200 | return NULL; | |
201 | } | |
a1e514c5 | 202 | len = skb->len + ETH_HLEN; |
b863ceb7 | 203 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 204 | if (!skb) |
ba01877f | 205 | goto out; |
b863ceb7 PM |
206 | |
207 | skb->dev = dev; | |
208 | skb->pkt_type = PACKET_HOST; | |
209 | ||
ba01877f SS |
210 | ret = vlan->receive(skb); |
211 | ||
212 | out: | |
213 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
b863ceb7 PM |
214 | return NULL; |
215 | } | |
216 | ||
618e1b74 AB |
217 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
218 | { | |
219 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
220 | const struct macvlan_port *port = vlan->port; | |
221 | const struct macvlan_dev *dest; | |
222 | ||
223 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
224 | const struct ethhdr *eth = (void *)skb->data; | |
225 | ||
226 | /* send to other bridge ports directly */ | |
227 | if (is_multicast_ether_addr(eth->h_dest)) { | |
228 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
229 | goto xmit_world; | |
230 | } | |
231 | ||
232 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
233 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
234 | unsigned int length = skb->len + ETH_HLEN; | |
fc0663d6 | 235 | int ret = dest->forward(dest->dev, skb); |
618e1b74 AB |
236 | macvlan_count_rx(dest, length, |
237 | ret == NET_RX_SUCCESS, 0); | |
238 | ||
239 | return NET_XMIT_SUCCESS; | |
240 | } | |
241 | } | |
242 | ||
243 | xmit_world: | |
8a83a00b | 244 | skb_set_dev(skb, vlan->lowerdev); |
618e1b74 AB |
245 | return dev_queue_xmit(skb); |
246 | } | |
247 | ||
fc0663d6 AB |
248 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
249 | struct net_device *dev) | |
b863ceb7 | 250 | { |
b863ceb7 PM |
251 | unsigned int len = skb->len; |
252 | int ret; | |
8ffab51b | 253 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 254 | |
618e1b74 | 255 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 256 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
8ffab51b | 257 | struct macvlan_pcpu_stats *pcpu_stats; |
2c114553 | 258 | |
8ffab51b ED |
259 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
260 | u64_stats_update_begin(&pcpu_stats->syncp); | |
261 | pcpu_stats->tx_packets++; | |
262 | pcpu_stats->tx_bytes += len; | |
263 | u64_stats_update_end(&pcpu_stats->syncp); | |
264 | } else { | |
265 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
266 | } | |
cbbef5e1 | 267 | return ret; |
b863ceb7 | 268 | } |
fc0663d6 | 269 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
270 | |
271 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
272 | unsigned short type, const void *daddr, |
273 | const void *saddr, unsigned len) | |
b863ceb7 PM |
274 | { |
275 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
276 | struct net_device *lowerdev = vlan->lowerdev; | |
277 | ||
0c4e8581 SH |
278 | return dev_hard_header(skb, lowerdev, type, daddr, |
279 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
280 | } |
281 | ||
3b04ddde SH |
282 | static const struct header_ops macvlan_hard_header_ops = { |
283 | .create = macvlan_hard_header, | |
284 | .rebuild = eth_rebuild_header, | |
285 | .parse = eth_header_parse, | |
3b04ddde SH |
286 | .cache = eth_header_cache, |
287 | .cache_update = eth_header_cache_update, | |
288 | }; | |
289 | ||
b863ceb7 PM |
290 | static int macvlan_open(struct net_device *dev) |
291 | { | |
292 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
293 | struct net_device *lowerdev = vlan->lowerdev; |
294 | int err; | |
295 | ||
eb06acdc SS |
296 | if (vlan->port->passthru) { |
297 | dev_set_promiscuity(lowerdev, 1); | |
298 | goto hash_add; | |
299 | } | |
300 | ||
f9ac30f0 EB |
301 | err = -EBUSY; |
302 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
303 | goto out; | |
304 | ||
a748ee24 | 305 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 306 | if (err < 0) |
b89fb7da WC |
307 | goto out; |
308 | if (dev->flags & IFF_ALLMULTI) { | |
309 | err = dev_set_allmulti(lowerdev, 1); | |
310 | if (err < 0) | |
311 | goto del_unicast; | |
312 | } | |
eb06acdc SS |
313 | |
314 | hash_add: | |
f9ac30f0 | 315 | macvlan_hash_add(vlan); |
b863ceb7 | 316 | return 0; |
b89fb7da WC |
317 | |
318 | del_unicast: | |
a748ee24 | 319 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
320 | out: |
321 | return err; | |
b863ceb7 PM |
322 | } |
323 | ||
324 | static int macvlan_stop(struct net_device *dev) | |
325 | { | |
326 | struct macvlan_dev *vlan = netdev_priv(dev); | |
327 | struct net_device *lowerdev = vlan->lowerdev; | |
328 | ||
eb06acdc SS |
329 | if (vlan->port->passthru) { |
330 | dev_set_promiscuity(lowerdev, -1); | |
331 | goto hash_del; | |
332 | } | |
333 | ||
b863ceb7 PM |
334 | dev_mc_unsync(lowerdev, dev); |
335 | if (dev->flags & IFF_ALLMULTI) | |
336 | dev_set_allmulti(lowerdev, -1); | |
337 | ||
a748ee24 | 338 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 339 | |
eb06acdc | 340 | hash_del: |
f9ac30f0 | 341 | macvlan_hash_del(vlan); |
b863ceb7 PM |
342 | return 0; |
343 | } | |
344 | ||
ad5d20a6 PM |
345 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
346 | { | |
347 | struct macvlan_dev *vlan = netdev_priv(dev); | |
348 | struct net_device *lowerdev = vlan->lowerdev; | |
349 | struct sockaddr *addr = p; | |
350 | int err; | |
351 | ||
352 | if (!is_valid_ether_addr(addr->sa_data)) | |
353 | return -EADDRNOTAVAIL; | |
354 | ||
f9ac30f0 EB |
355 | if (!(dev->flags & IFF_UP)) { |
356 | /* Just copy in the new address */ | |
357 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
358 | } else { | |
359 | /* Rehash and update the device filters */ | |
360 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
361 | return -EBUSY; | |
ad5d20a6 | 362 | |
a748ee24 | 363 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 364 | if (err) |
f9ac30f0 | 365 | return err; |
ad5d20a6 | 366 | |
a748ee24 | 367 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
368 | |
369 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
370 | } | |
ad5d20a6 PM |
371 | return 0; |
372 | } | |
373 | ||
b863ceb7 PM |
374 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
375 | { | |
376 | struct macvlan_dev *vlan = netdev_priv(dev); | |
377 | struct net_device *lowerdev = vlan->lowerdev; | |
378 | ||
379 | if (change & IFF_ALLMULTI) | |
380 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
381 | } | |
382 | ||
383 | static void macvlan_set_multicast_list(struct net_device *dev) | |
384 | { | |
385 | struct macvlan_dev *vlan = netdev_priv(dev); | |
386 | ||
387 | dev_mc_sync(vlan->lowerdev, dev); | |
388 | } | |
389 | ||
390 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
391 | { | |
392 | struct macvlan_dev *vlan = netdev_priv(dev); | |
393 | ||
394 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
395 | return -EINVAL; | |
396 | dev->mtu = new_mtu; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | /* | |
401 | * macvlan network devices have devices nesting below it and are a special | |
402 | * "super class" of normal network devices; split their locks off into a | |
403 | * separate class since they always nest. | |
404 | */ | |
405 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 406 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
407 | |
408 | #define MACVLAN_FEATURES \ | |
409 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
410 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
6eb3a855 | 411 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO) |
b863ceb7 PM |
412 | |
413 | #define MACVLAN_STATE_MASK \ | |
414 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
415 | ||
e8a0464c DM |
416 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
417 | struct netdev_queue *txq, | |
418 | void *_unused) | |
c773e847 DM |
419 | { |
420 | lockdep_set_class(&txq->_xmit_lock, | |
421 | &macvlan_netdev_xmit_lock_key); | |
422 | } | |
423 | ||
424 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
425 | { | |
cf508b12 DM |
426 | lockdep_set_class(&dev->addr_list_lock, |
427 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 428 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
429 | } |
430 | ||
b863ceb7 PM |
431 | static int macvlan_init(struct net_device *dev) |
432 | { | |
433 | struct macvlan_dev *vlan = netdev_priv(dev); | |
434 | const struct net_device *lowerdev = vlan->lowerdev; | |
435 | ||
436 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
437 | (lowerdev->state & MACVLAN_STATE_MASK); | |
438 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8ffab51b | 439 | dev->features |= NETIF_F_LLTX; |
8c2acc53 | 440 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 441 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 442 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 443 | |
c773e847 DM |
444 | macvlan_set_lockdep_class(dev); |
445 | ||
8ffab51b ED |
446 | vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); |
447 | if (!vlan->pcpu_stats) | |
fccaf710 ED |
448 | return -ENOMEM; |
449 | ||
b863ceb7 PM |
450 | return 0; |
451 | } | |
452 | ||
fccaf710 ED |
453 | static void macvlan_uninit(struct net_device *dev) |
454 | { | |
455 | struct macvlan_dev *vlan = netdev_priv(dev); | |
456 | ||
8ffab51b | 457 | free_percpu(vlan->pcpu_stats); |
fccaf710 ED |
458 | } |
459 | ||
28172739 ED |
460 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
461 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 462 | { |
fccaf710 ED |
463 | struct macvlan_dev *vlan = netdev_priv(dev); |
464 | ||
8ffab51b ED |
465 | if (vlan->pcpu_stats) { |
466 | struct macvlan_pcpu_stats *p; | |
467 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
468 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 469 | unsigned int start; |
fccaf710 ED |
470 | int i; |
471 | ||
472 | for_each_possible_cpu(i) { | |
8ffab51b | 473 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e ED |
474 | do { |
475 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
476 | rx_packets = p->rx_packets; | |
477 | rx_bytes = p->rx_bytes; | |
478 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
479 | tx_packets = p->tx_packets; |
480 | tx_bytes = p->tx_bytes; | |
bc66154e | 481 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
8ffab51b ED |
482 | |
483 | stats->rx_packets += rx_packets; | |
484 | stats->rx_bytes += rx_bytes; | |
485 | stats->multicast += rx_multicast; | |
486 | stats->tx_packets += tx_packets; | |
487 | stats->tx_bytes += tx_bytes; | |
488 | /* rx_errors & tx_dropped are u32, updated | |
489 | * without syncp protection. | |
490 | */ | |
491 | rx_errors += p->rx_errors; | |
492 | tx_dropped += p->tx_dropped; | |
fccaf710 | 493 | } |
8ffab51b ED |
494 | stats->rx_errors = rx_errors; |
495 | stats->rx_dropped = rx_errors; | |
496 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
497 | } |
498 | return stats; | |
499 | } | |
500 | ||
b863ceb7 PM |
501 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
502 | struct ethtool_drvinfo *drvinfo) | |
503 | { | |
504 | snprintf(drvinfo->driver, 32, "macvlan"); | |
505 | snprintf(drvinfo->version, 32, "0.1"); | |
506 | } | |
507 | ||
508 | static u32 macvlan_ethtool_get_rx_csum(struct net_device *dev) | |
509 | { | |
510 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 511 | return dev_ethtool_get_rx_csum(vlan->lowerdev); |
b863ceb7 PM |
512 | } |
513 | ||
9edb8bb6 SH |
514 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
515 | struct ethtool_cmd *cmd) | |
516 | { | |
517 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 518 | return dev_ethtool_get_settings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
519 | } |
520 | ||
521 | static u32 macvlan_ethtool_get_flags(struct net_device *dev) | |
522 | { | |
523 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
b1b67dd4 | 524 | return dev_ethtool_get_flags(vlan->lowerdev); |
9edb8bb6 SH |
525 | } |
526 | ||
b863ceb7 PM |
527 | static const struct ethtool_ops macvlan_ethtool_ops = { |
528 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 529 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 | 530 | .get_rx_csum = macvlan_ethtool_get_rx_csum, |
b863ceb7 | 531 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
9edb8bb6 | 532 | .get_flags = macvlan_ethtool_get_flags, |
b863ceb7 PM |
533 | }; |
534 | ||
54a30c97 SH |
535 | static const struct net_device_ops macvlan_netdev_ops = { |
536 | .ndo_init = macvlan_init, | |
fccaf710 | 537 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
538 | .ndo_open = macvlan_open, |
539 | .ndo_stop = macvlan_stop, | |
00829823 | 540 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
541 | .ndo_change_mtu = macvlan_change_mtu, |
542 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
543 | .ndo_set_mac_address = macvlan_set_mac_address, | |
544 | .ndo_set_multicast_list = macvlan_set_multicast_list, | |
bc66154e | 545 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 SH |
546 | .ndo_validate_addr = eth_validate_addr, |
547 | }; | |
548 | ||
8a35747a | 549 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
550 | { |
551 | ether_setup(dev); | |
552 | ||
93f154b5 | 553 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
54a30c97 | 554 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 555 | dev->destructor = free_netdev; |
3b04ddde | 556 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 | 557 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
558 | } |
559 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
560 | ||
561 | static void macvlan_setup(struct net_device *dev) | |
562 | { | |
563 | macvlan_common_setup(dev); | |
b863ceb7 PM |
564 | dev->tx_queue_len = 0; |
565 | } | |
566 | ||
567 | static int macvlan_port_create(struct net_device *dev) | |
568 | { | |
569 | struct macvlan_port *port; | |
570 | unsigned int i; | |
ab95bfe0 | 571 | int err; |
b863ceb7 PM |
572 | |
573 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
574 | return -EINVAL; | |
575 | ||
576 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
577 | if (port == NULL) | |
578 | return -ENOMEM; | |
579 | ||
eb06acdc | 580 | port->passthru = false; |
b863ceb7 PM |
581 | port->dev = dev; |
582 | INIT_LIST_HEAD(&port->vlans); | |
583 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
584 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 585 | |
a35e2c1b JP |
586 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
587 | if (err) | |
ab95bfe0 | 588 | kfree(port); |
ab95bfe0 | 589 | |
a35e2c1b | 590 | dev->priv_flags |= IFF_MACVLAN_PORT; |
ab95bfe0 | 591 | return err; |
b863ceb7 PM |
592 | } |
593 | ||
8b37ef0a JP |
594 | static void macvlan_port_rcu_free(struct rcu_head *head) |
595 | { | |
596 | struct macvlan_port *port; | |
597 | ||
598 | port = container_of(head, struct macvlan_port, rcu); | |
599 | kfree(port); | |
600 | } | |
601 | ||
b863ceb7 PM |
602 | static void macvlan_port_destroy(struct net_device *dev) |
603 | { | |
a35e2c1b | 604 | struct macvlan_port *port = macvlan_port_get(dev); |
b863ceb7 | 605 | |
a35e2c1b | 606 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 607 | netdev_rx_handler_unregister(dev); |
8b37ef0a | 608 | call_rcu(&port->rcu, macvlan_port_rcu_free); |
b863ceb7 PM |
609 | } |
610 | ||
b863ceb7 PM |
611 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
612 | { | |
613 | if (tb[IFLA_ADDRESS]) { | |
614 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
615 | return -EINVAL; | |
616 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
617 | return -EADDRNOTAVAIL; | |
618 | } | |
27c0b1a8 AB |
619 | |
620 | if (data && data[IFLA_MACVLAN_MODE]) { | |
621 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
622 | case MACVLAN_MODE_PRIVATE: | |
623 | case MACVLAN_MODE_VEPA: | |
624 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 625 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
626 | break; |
627 | default: | |
628 | return -EINVAL; | |
629 | } | |
630 | } | |
b863ceb7 PM |
631 | return 0; |
632 | } | |
633 | ||
fc0663d6 AB |
634 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
635 | struct nlattr *tb[], struct nlattr *data[], | |
636 | int (*receive)(struct sk_buff *skb), | |
637 | int (*forward)(struct net_device *dev, | |
638 | struct sk_buff *skb)) | |
b863ceb7 PM |
639 | { |
640 | struct macvlan_dev *vlan = netdev_priv(dev); | |
641 | struct macvlan_port *port; | |
642 | struct net_device *lowerdev; | |
643 | int err; | |
644 | ||
645 | if (!tb[IFLA_LINK]) | |
646 | return -EINVAL; | |
647 | ||
81adee47 | 648 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
649 | if (lowerdev == NULL) |
650 | return -ENODEV; | |
651 | ||
b0832a29 EB |
652 | /* When creating macvlans on top of other macvlans - use |
653 | * the real device as the lowerdev. | |
a6ca5f1d | 654 | */ |
b0832a29 EB |
655 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
656 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
657 | lowerdev = lowervlan->lowerdev; | |
658 | } | |
a6ca5f1d | 659 | |
b863ceb7 PM |
660 | if (!tb[IFLA_MTU]) |
661 | dev->mtu = lowerdev->mtu; | |
662 | else if (dev->mtu > lowerdev->mtu) | |
663 | return -EINVAL; | |
664 | ||
665 | if (!tb[IFLA_ADDRESS]) | |
666 | random_ether_addr(dev->dev_addr); | |
667 | ||
a35e2c1b | 668 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
669 | err = macvlan_port_create(lowerdev); |
670 | if (err < 0) | |
671 | return err; | |
672 | } | |
a35e2c1b | 673 | port = macvlan_port_get(lowerdev); |
b863ceb7 | 674 | |
eb06acdc SS |
675 | /* Only 1 macvlan device can be created in passthru mode */ |
676 | if (port->passthru) | |
677 | return -EINVAL; | |
678 | ||
b863ceb7 PM |
679 | vlan->lowerdev = lowerdev; |
680 | vlan->dev = dev; | |
681 | vlan->port = port; | |
fc0663d6 AB |
682 | vlan->receive = receive; |
683 | vlan->forward = forward; | |
b863ceb7 | 684 | |
27c0b1a8 AB |
685 | vlan->mode = MACVLAN_MODE_VEPA; |
686 | if (data && data[IFLA_MACVLAN_MODE]) | |
687 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
688 | ||
eb06acdc SS |
689 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
690 | if (!list_empty(&port->vlans)) | |
691 | return -EINVAL; | |
692 | port->passthru = true; | |
693 | memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN); | |
694 | } | |
695 | ||
b863ceb7 PM |
696 | err = register_netdevice(dev); |
697 | if (err < 0) | |
f16d3d57 | 698 | goto destroy_port; |
b863ceb7 PM |
699 | |
700 | list_add_tail(&vlan->list, &port->vlans); | |
fc4a7489 | 701 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 702 | |
b863ceb7 | 703 | return 0; |
f16d3d57 JP |
704 | |
705 | destroy_port: | |
706 | if (list_empty(&port->vlans)) | |
707 | macvlan_port_destroy(lowerdev); | |
708 | ||
709 | return err; | |
b863ceb7 | 710 | } |
fc0663d6 | 711 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 712 | |
fc0663d6 AB |
713 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
714 | struct nlattr *tb[], struct nlattr *data[]) | |
715 | { | |
716 | return macvlan_common_newlink(src_net, dev, tb, data, | |
717 | netif_rx, | |
718 | dev_forward_skb); | |
719 | } | |
720 | ||
721 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
722 | { |
723 | struct macvlan_dev *vlan = netdev_priv(dev); | |
724 | struct macvlan_port *port = vlan->port; | |
725 | ||
726 | list_del(&vlan->list); | |
23289a37 | 727 | unregister_netdevice_queue(dev, head); |
b863ceb7 PM |
728 | |
729 | if (list_empty(&port->vlans)) | |
73120964 | 730 | macvlan_port_destroy(port->dev); |
b863ceb7 | 731 | } |
fc0663d6 | 732 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 733 | |
27c0b1a8 AB |
734 | static int macvlan_changelink(struct net_device *dev, |
735 | struct nlattr *tb[], struct nlattr *data[]) | |
736 | { | |
737 | struct macvlan_dev *vlan = netdev_priv(dev); | |
738 | if (data && data[IFLA_MACVLAN_MODE]) | |
739 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
740 | return 0; | |
741 | } | |
742 | ||
743 | static size_t macvlan_get_size(const struct net_device *dev) | |
744 | { | |
745 | return nla_total_size(4); | |
746 | } | |
747 | ||
748 | static int macvlan_fill_info(struct sk_buff *skb, | |
749 | const struct net_device *dev) | |
750 | { | |
751 | struct macvlan_dev *vlan = netdev_priv(dev); | |
752 | ||
753 | NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); | |
754 | return 0; | |
755 | ||
756 | nla_put_failure: | |
757 | return -EMSGSIZE; | |
758 | } | |
759 | ||
760 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
761 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, | |
762 | }; | |
763 | ||
fc0663d6 AB |
764 | int macvlan_link_register(struct rtnl_link_ops *ops) |
765 | { | |
766 | /* common fields */ | |
767 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
768 | ops->validate = macvlan_validate; |
769 | ops->maxtype = IFLA_MACVLAN_MAX; | |
770 | ops->policy = macvlan_policy; | |
771 | ops->changelink = macvlan_changelink; | |
772 | ops->get_size = macvlan_get_size; | |
773 | ops->fill_info = macvlan_fill_info; | |
774 | ||
775 | return rtnl_link_register(ops); | |
776 | }; | |
777 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
778 | ||
779 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 780 | .kind = "macvlan", |
8a35747a | 781 | .setup = macvlan_setup, |
b863ceb7 PM |
782 | .newlink = macvlan_newlink, |
783 | .dellink = macvlan_dellink, | |
784 | }; | |
785 | ||
786 | static int macvlan_device_event(struct notifier_block *unused, | |
787 | unsigned long event, void *ptr) | |
788 | { | |
789 | struct net_device *dev = ptr; | |
790 | struct macvlan_dev *vlan, *next; | |
791 | struct macvlan_port *port; | |
792 | ||
a35e2c1b | 793 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
794 | return NOTIFY_DONE; |
795 | ||
a35e2c1b JP |
796 | port = macvlan_port_get(dev); |
797 | ||
b863ceb7 PM |
798 | switch (event) { |
799 | case NETDEV_CHANGE: | |
800 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
801 | netif_stacked_transfer_operstate(vlan->lowerdev, |
802 | vlan->dev); | |
b863ceb7 PM |
803 | break; |
804 | case NETDEV_FEAT_CHANGE: | |
805 | list_for_each_entry(vlan, &port->vlans, list) { | |
806 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 807 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
808 | netdev_features_change(vlan->dev); |
809 | } | |
810 | break; | |
811 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
812 | /* twiddle thumbs on netns device moves */ |
813 | if (dev->reg_state != NETREG_UNREGISTERING) | |
814 | break; | |
815 | ||
b863ceb7 | 816 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
fc0663d6 | 817 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, NULL); |
b863ceb7 | 818 | break; |
1c01fe14 JP |
819 | case NETDEV_PRE_TYPE_CHANGE: |
820 | /* Forbid underlaying device to change its type. */ | |
821 | return NOTIFY_BAD; | |
b863ceb7 PM |
822 | } |
823 | return NOTIFY_DONE; | |
824 | } | |
825 | ||
826 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
827 | .notifier_call = macvlan_device_event, | |
828 | }; | |
829 | ||
830 | static int __init macvlan_init_module(void) | |
831 | { | |
832 | int err; | |
833 | ||
834 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 835 | |
fc0663d6 | 836 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
837 | if (err < 0) |
838 | goto err1; | |
839 | return 0; | |
840 | err1: | |
b863ceb7 PM |
841 | unregister_netdevice_notifier(&macvlan_notifier_block); |
842 | return err; | |
843 | } | |
844 | ||
845 | static void __exit macvlan_cleanup_module(void) | |
846 | { | |
847 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
848 | unregister_netdevice_notifier(&macvlan_notifier_block); |
849 | } | |
850 | ||
851 | module_init(macvlan_init_module); | |
852 | module_exit(macvlan_cleanup_module); | |
853 | ||
854 | MODULE_LICENSE("GPL"); | |
855 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
856 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
857 | MODULE_ALIAS_RTNL_LINK("macvlan"); |