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> | |
87002b03 | 29 | #include <linux/if_vlan.h> |
b863ceb7 PM |
30 | #include <linux/if_link.h> |
31 | #include <linux/if_macvlan.h> | |
32 | #include <net/rtnetlink.h> | |
618e1b74 | 33 | #include <net/xfrm.h> |
b863ceb7 PM |
34 | |
35 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) | |
36 | ||
37 | struct macvlan_port { | |
38 | struct net_device *dev; | |
39 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
40 | struct list_head vlans; | |
8b37ef0a | 41 | struct rcu_head rcu; |
eb06acdc | 42 | bool passthru; |
d5cd9244 | 43 | int count; |
b863ceb7 PM |
44 | }; |
45 | ||
d5cd9244 EB |
46 | static void macvlan_port_destroy(struct net_device *dev); |
47 | ||
a35e2c1b JP |
48 | #define macvlan_port_get_rcu(dev) \ |
49 | ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data)) | |
50 | #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data) | |
51 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) | |
52 | ||
b863ceb7 PM |
53 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
54 | const unsigned char *addr) | |
55 | { | |
56 | struct macvlan_dev *vlan; | |
57 | struct hlist_node *n; | |
58 | ||
59 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { | |
ac06713d | 60 | if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
61 | return vlan; |
62 | } | |
63 | return NULL; | |
64 | } | |
65 | ||
f9ac30f0 EB |
66 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
67 | { | |
68 | struct macvlan_port *port = vlan->port; | |
69 | const unsigned char *addr = vlan->dev->dev_addr; | |
70 | ||
71 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
72 | } | |
73 | ||
449f4544 | 74 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
75 | { |
76 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
77 | if (sync) |
78 | synchronize_rcu(); | |
f9ac30f0 EB |
79 | } |
80 | ||
81 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
82 | const unsigned char *addr) | |
83 | { | |
449f4544 | 84 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
85 | /* Now that we are unhashed it is safe to change the device |
86 | * address without confusing packet delivery. | |
87 | */ | |
88 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
89 | macvlan_hash_add(vlan); | |
90 | } | |
91 | ||
92 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
93 | const unsigned char *addr) | |
94 | { | |
95 | /* Test to see if the specified multicast address is | |
96 | * currently in use by the underlying device or | |
97 | * another macvlan. | |
98 | */ | |
ac06713d | 99 | if (!compare_ether_addr_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
100 | return 1; |
101 | ||
102 | if (macvlan_hash_lookup(port, addr)) | |
103 | return 1; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
a1e514c5 | 108 | |
fc0663d6 AB |
109 | static int macvlan_broadcast_one(struct sk_buff *skb, |
110 | const struct macvlan_dev *vlan, | |
618e1b74 | 111 | const struct ethhdr *eth, bool local) |
a1e514c5 | 112 | { |
fc0663d6 | 113 | struct net_device *dev = vlan->dev; |
a1e514c5 AB |
114 | if (!skb) |
115 | return NET_RX_DROP; | |
116 | ||
618e1b74 | 117 | if (local) |
fc0663d6 | 118 | return vlan->forward(dev, skb); |
618e1b74 | 119 | |
a1e514c5 AB |
120 | skb->dev = dev; |
121 | if (!compare_ether_addr_64bits(eth->h_dest, | |
122 | dev->broadcast)) | |
123 | skb->pkt_type = PACKET_BROADCAST; | |
124 | else | |
125 | skb->pkt_type = PACKET_MULTICAST; | |
126 | ||
fc0663d6 | 127 | return vlan->receive(skb); |
a1e514c5 AB |
128 | } |
129 | ||
b863ceb7 | 130 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
131 | const struct macvlan_port *port, |
132 | struct net_device *src, | |
133 | enum macvlan_mode mode) | |
b863ceb7 PM |
134 | { |
135 | const struct ethhdr *eth = eth_hdr(skb); | |
136 | const struct macvlan_dev *vlan; | |
137 | struct hlist_node *n; | |
b863ceb7 PM |
138 | struct sk_buff *nskb; |
139 | unsigned int i; | |
a1e514c5 | 140 | int err; |
b863ceb7 | 141 | |
efbbced3 PM |
142 | if (skb->protocol == htons(ETH_P_PAUSE)) |
143 | return; | |
144 | ||
b863ceb7 PM |
145 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
146 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { | |
618e1b74 AB |
147 | if (vlan->dev == src || !(vlan->mode & mode)) |
148 | continue; | |
149 | ||
b863ceb7 | 150 | nskb = skb_clone(skb, GFP_ATOMIC); |
fc0663d6 | 151 | err = macvlan_broadcast_one(nskb, vlan, eth, |
618e1b74 | 152 | mode == MACVLAN_MODE_BRIDGE); |
a1e514c5 AB |
153 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
154 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
155 | } |
156 | } | |
157 | } | |
158 | ||
159 | /* called under rcu_read_lock() from netif_receive_skb */ | |
8a4eb573 | 160 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) |
b863ceb7 | 161 | { |
ab95bfe0 | 162 | struct macvlan_port *port; |
8a4eb573 | 163 | struct sk_buff *skb = *pskb; |
b863ceb7 | 164 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 165 | const struct macvlan_dev *vlan; |
618e1b74 | 166 | const struct macvlan_dev *src; |
b863ceb7 | 167 | struct net_device *dev; |
ba01877f SS |
168 | unsigned int len = 0; |
169 | int ret = NET_RX_DROP; | |
b863ceb7 | 170 | |
a35e2c1b | 171 | port = macvlan_port_get_rcu(skb->dev); |
b863ceb7 | 172 | if (is_multicast_ether_addr(eth->h_dest)) { |
bc416d97 ED |
173 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); |
174 | if (!skb) | |
175 | return RX_HANDLER_CONSUMED; | |
4ec7ac12 | 176 | eth = eth_hdr(skb); |
618e1b74 AB |
177 | src = macvlan_hash_lookup(port, eth->h_source); |
178 | if (!src) | |
179 | /* frame comes from an external address */ | |
180 | macvlan_broadcast(skb, port, NULL, | |
181 | MACVLAN_MODE_PRIVATE | | |
182 | MACVLAN_MODE_VEPA | | |
eb06acdc | 183 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
184 | MACVLAN_MODE_BRIDGE); |
185 | else if (src->mode == MACVLAN_MODE_VEPA) | |
186 | /* flood to everyone except source */ | |
187 | macvlan_broadcast(skb, port, src->dev, | |
188 | MACVLAN_MODE_VEPA | | |
189 | MACVLAN_MODE_BRIDGE); | |
190 | else if (src->mode == MACVLAN_MODE_BRIDGE) | |
191 | /* | |
192 | * flood only to VEPA ports, bridge ports | |
193 | * already saw the frame on the way out. | |
194 | */ | |
195 | macvlan_broadcast(skb, port, src->dev, | |
196 | MACVLAN_MODE_VEPA); | |
729e72a1 | 197 | else { |
198 | /* forward to original port. */ | |
199 | vlan = src; | |
200 | ret = macvlan_broadcast_one(skb, vlan, eth, 0); | |
201 | goto out; | |
202 | } | |
203 | ||
8a4eb573 | 204 | return RX_HANDLER_PASS; |
b863ceb7 PM |
205 | } |
206 | ||
eb06acdc SS |
207 | if (port->passthru) |
208 | vlan = list_first_entry(&port->vlans, struct macvlan_dev, list); | |
209 | else | |
210 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 211 | if (vlan == NULL) |
8a4eb573 | 212 | return RX_HANDLER_PASS; |
b863ceb7 PM |
213 | |
214 | dev = vlan->dev; | |
215 | if (unlikely(!(dev->flags & IFF_UP))) { | |
216 | kfree_skb(skb); | |
8a4eb573 | 217 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 218 | } |
a1e514c5 | 219 | len = skb->len + ETH_HLEN; |
b863ceb7 | 220 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 221 | if (!skb) |
ba01877f | 222 | goto out; |
b863ceb7 PM |
223 | |
224 | skb->dev = dev; | |
225 | skb->pkt_type = PACKET_HOST; | |
226 | ||
ba01877f SS |
227 | ret = vlan->receive(skb); |
228 | ||
229 | out: | |
230 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 231 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
232 | } |
233 | ||
618e1b74 AB |
234 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
235 | { | |
236 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
237 | const struct macvlan_port *port = vlan->port; | |
238 | const struct macvlan_dev *dest; | |
12a2856b | 239 | __u8 ip_summed = skb->ip_summed; |
618e1b74 AB |
240 | |
241 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
242 | const struct ethhdr *eth = (void *)skb->data; | |
12a2856b | 243 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
618e1b74 AB |
244 | |
245 | /* send to other bridge ports directly */ | |
246 | if (is_multicast_ether_addr(eth->h_dest)) { | |
247 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
248 | goto xmit_world; | |
249 | } | |
250 | ||
251 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
252 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 253 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 254 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
255 | |
256 | return NET_XMIT_SUCCESS; | |
257 | } | |
258 | } | |
259 | ||
260 | xmit_world: | |
12a2856b | 261 | skb->ip_summed = ip_summed; |
8a83a00b | 262 | skb_set_dev(skb, vlan->lowerdev); |
618e1b74 AB |
263 | return dev_queue_xmit(skb); |
264 | } | |
265 | ||
fc0663d6 AB |
266 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
267 | struct net_device *dev) | |
b863ceb7 | 268 | { |
b863ceb7 PM |
269 | unsigned int len = skb->len; |
270 | int ret; | |
8ffab51b | 271 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 272 | |
618e1b74 | 273 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 274 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
8ffab51b | 275 | struct macvlan_pcpu_stats *pcpu_stats; |
2c114553 | 276 | |
8ffab51b ED |
277 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
278 | u64_stats_update_begin(&pcpu_stats->syncp); | |
279 | pcpu_stats->tx_packets++; | |
280 | pcpu_stats->tx_bytes += len; | |
281 | u64_stats_update_end(&pcpu_stats->syncp); | |
282 | } else { | |
283 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
284 | } | |
cbbef5e1 | 285 | return ret; |
b863ceb7 | 286 | } |
fc0663d6 | 287 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
288 | |
289 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
290 | unsigned short type, const void *daddr, |
291 | const void *saddr, unsigned len) | |
b863ceb7 PM |
292 | { |
293 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
294 | struct net_device *lowerdev = vlan->lowerdev; | |
295 | ||
0c4e8581 SH |
296 | return dev_hard_header(skb, lowerdev, type, daddr, |
297 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
298 | } |
299 | ||
3b04ddde SH |
300 | static const struct header_ops macvlan_hard_header_ops = { |
301 | .create = macvlan_hard_header, | |
302 | .rebuild = eth_rebuild_header, | |
303 | .parse = eth_header_parse, | |
3b04ddde SH |
304 | .cache = eth_header_cache, |
305 | .cache_update = eth_header_cache_update, | |
306 | }; | |
307 | ||
b863ceb7 PM |
308 | static int macvlan_open(struct net_device *dev) |
309 | { | |
310 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
311 | struct net_device *lowerdev = vlan->lowerdev; |
312 | int err; | |
313 | ||
eb06acdc SS |
314 | if (vlan->port->passthru) { |
315 | dev_set_promiscuity(lowerdev, 1); | |
316 | goto hash_add; | |
317 | } | |
318 | ||
f9ac30f0 EB |
319 | err = -EBUSY; |
320 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
321 | goto out; | |
322 | ||
a748ee24 | 323 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 324 | if (err < 0) |
b89fb7da WC |
325 | goto out; |
326 | if (dev->flags & IFF_ALLMULTI) { | |
327 | err = dev_set_allmulti(lowerdev, 1); | |
328 | if (err < 0) | |
329 | goto del_unicast; | |
330 | } | |
eb06acdc SS |
331 | |
332 | hash_add: | |
f9ac30f0 | 333 | macvlan_hash_add(vlan); |
b863ceb7 | 334 | return 0; |
b89fb7da WC |
335 | |
336 | del_unicast: | |
a748ee24 | 337 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
338 | out: |
339 | return err; | |
b863ceb7 PM |
340 | } |
341 | ||
342 | static int macvlan_stop(struct net_device *dev) | |
343 | { | |
344 | struct macvlan_dev *vlan = netdev_priv(dev); | |
345 | struct net_device *lowerdev = vlan->lowerdev; | |
346 | ||
eb06acdc SS |
347 | if (vlan->port->passthru) { |
348 | dev_set_promiscuity(lowerdev, -1); | |
349 | goto hash_del; | |
350 | } | |
351 | ||
b863ceb7 PM |
352 | dev_mc_unsync(lowerdev, dev); |
353 | if (dev->flags & IFF_ALLMULTI) | |
354 | dev_set_allmulti(lowerdev, -1); | |
355 | ||
a748ee24 | 356 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 357 | |
eb06acdc | 358 | hash_del: |
449f4544 | 359 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
360 | return 0; |
361 | } | |
362 | ||
ad5d20a6 PM |
363 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
364 | { | |
365 | struct macvlan_dev *vlan = netdev_priv(dev); | |
366 | struct net_device *lowerdev = vlan->lowerdev; | |
367 | struct sockaddr *addr = p; | |
368 | int err; | |
369 | ||
370 | if (!is_valid_ether_addr(addr->sa_data)) | |
371 | return -EADDRNOTAVAIL; | |
372 | ||
f9ac30f0 EB |
373 | if (!(dev->flags & IFF_UP)) { |
374 | /* Just copy in the new address */ | |
375 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
376 | } else { | |
377 | /* Rehash and update the device filters */ | |
378 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
379 | return -EBUSY; | |
ad5d20a6 | 380 | |
a748ee24 | 381 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 382 | if (err) |
f9ac30f0 | 383 | return err; |
ad5d20a6 | 384 | |
a748ee24 | 385 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
386 | |
387 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
388 | } | |
ad5d20a6 PM |
389 | return 0; |
390 | } | |
391 | ||
b863ceb7 PM |
392 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
393 | { | |
394 | struct macvlan_dev *vlan = netdev_priv(dev); | |
395 | struct net_device *lowerdev = vlan->lowerdev; | |
396 | ||
397 | if (change & IFF_ALLMULTI) | |
398 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
399 | } | |
400 | ||
401 | static void macvlan_set_multicast_list(struct net_device *dev) | |
402 | { | |
403 | struct macvlan_dev *vlan = netdev_priv(dev); | |
404 | ||
405 | dev_mc_sync(vlan->lowerdev, dev); | |
406 | } | |
407 | ||
408 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
409 | { | |
410 | struct macvlan_dev *vlan = netdev_priv(dev); | |
411 | ||
412 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
413 | return -EINVAL; | |
414 | dev->mtu = new_mtu; | |
415 | return 0; | |
416 | } | |
417 | ||
418 | /* | |
419 | * macvlan network devices have devices nesting below it and are a special | |
420 | * "super class" of normal network devices; split their locks off into a | |
421 | * separate class since they always nest. | |
422 | */ | |
423 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 424 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
425 | |
426 | #define MACVLAN_FEATURES \ | |
427 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
428 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 JF |
429 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
430 | NETIF_F_HW_VLAN_FILTER) | |
b863ceb7 PM |
431 | |
432 | #define MACVLAN_STATE_MASK \ | |
433 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
434 | ||
e8a0464c DM |
435 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
436 | struct netdev_queue *txq, | |
437 | void *_unused) | |
c773e847 DM |
438 | { |
439 | lockdep_set_class(&txq->_xmit_lock, | |
440 | &macvlan_netdev_xmit_lock_key); | |
441 | } | |
442 | ||
443 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
444 | { | |
cf508b12 DM |
445 | lockdep_set_class(&dev->addr_list_lock, |
446 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 447 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
448 | } |
449 | ||
b863ceb7 PM |
450 | static int macvlan_init(struct net_device *dev) |
451 | { | |
452 | struct macvlan_dev *vlan = netdev_priv(dev); | |
453 | const struct net_device *lowerdev = vlan->lowerdev; | |
454 | ||
455 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
456 | (lowerdev->state & MACVLAN_STATE_MASK); | |
457 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8ffab51b | 458 | dev->features |= NETIF_F_LLTX; |
8c2acc53 | 459 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 460 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 461 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 462 | |
c773e847 DM |
463 | macvlan_set_lockdep_class(dev); |
464 | ||
8ffab51b ED |
465 | vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); |
466 | if (!vlan->pcpu_stats) | |
fccaf710 ED |
467 | return -ENOMEM; |
468 | ||
b863ceb7 PM |
469 | return 0; |
470 | } | |
471 | ||
fccaf710 ED |
472 | static void macvlan_uninit(struct net_device *dev) |
473 | { | |
474 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 475 | struct macvlan_port *port = vlan->port; |
fccaf710 | 476 | |
8ffab51b | 477 | free_percpu(vlan->pcpu_stats); |
d5cd9244 EB |
478 | |
479 | port->count -= 1; | |
480 | if (!port->count) | |
481 | macvlan_port_destroy(port->dev); | |
fccaf710 ED |
482 | } |
483 | ||
28172739 ED |
484 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
485 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 486 | { |
fccaf710 ED |
487 | struct macvlan_dev *vlan = netdev_priv(dev); |
488 | ||
8ffab51b ED |
489 | if (vlan->pcpu_stats) { |
490 | struct macvlan_pcpu_stats *p; | |
491 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
492 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 493 | unsigned int start; |
fccaf710 ED |
494 | int i; |
495 | ||
496 | for_each_possible_cpu(i) { | |
8ffab51b | 497 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e ED |
498 | do { |
499 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
500 | rx_packets = p->rx_packets; | |
501 | rx_bytes = p->rx_bytes; | |
502 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
503 | tx_packets = p->tx_packets; |
504 | tx_bytes = p->tx_bytes; | |
bc66154e | 505 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
8ffab51b ED |
506 | |
507 | stats->rx_packets += rx_packets; | |
508 | stats->rx_bytes += rx_bytes; | |
509 | stats->multicast += rx_multicast; | |
510 | stats->tx_packets += tx_packets; | |
511 | stats->tx_bytes += tx_bytes; | |
512 | /* rx_errors & tx_dropped are u32, updated | |
513 | * without syncp protection. | |
514 | */ | |
515 | rx_errors += p->rx_errors; | |
516 | tx_dropped += p->tx_dropped; | |
fccaf710 | 517 | } |
8ffab51b ED |
518 | stats->rx_errors = rx_errors; |
519 | stats->rx_dropped = rx_errors; | |
520 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
521 | } |
522 | return stats; | |
523 | } | |
524 | ||
8e586137 | 525 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
8d13e670 JF |
526 | unsigned short vid) |
527 | { | |
528 | struct macvlan_dev *vlan = netdev_priv(dev); | |
529 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 530 | |
87002b03 | 531 | return vlan_vid_add(lowerdev, vid); |
8d13e670 JF |
532 | } |
533 | ||
8e586137 | 534 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
8d13e670 JF |
535 | unsigned short vid) |
536 | { | |
537 | struct macvlan_dev *vlan = netdev_priv(dev); | |
538 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 539 | |
87002b03 | 540 | vlan_vid_del(lowerdev, vid); |
8e586137 | 541 | return 0; |
8d13e670 JF |
542 | } |
543 | ||
b863ceb7 PM |
544 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
545 | struct ethtool_drvinfo *drvinfo) | |
546 | { | |
547 | snprintf(drvinfo->driver, 32, "macvlan"); | |
548 | snprintf(drvinfo->version, 32, "0.1"); | |
549 | } | |
550 | ||
9edb8bb6 SH |
551 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
552 | struct ethtool_cmd *cmd) | |
553 | { | |
554 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
555 | |
556 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
557 | } |
558 | ||
b863ceb7 PM |
559 | static const struct ethtool_ops macvlan_ethtool_ops = { |
560 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 561 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
562 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
563 | }; | |
564 | ||
54a30c97 SH |
565 | static const struct net_device_ops macvlan_netdev_ops = { |
566 | .ndo_init = macvlan_init, | |
fccaf710 | 567 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
568 | .ndo_open = macvlan_open, |
569 | .ndo_stop = macvlan_stop, | |
00829823 | 570 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
571 | .ndo_change_mtu = macvlan_change_mtu, |
572 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
573 | .ndo_set_mac_address = macvlan_set_mac_address, | |
afc4b13d | 574 | .ndo_set_rx_mode = macvlan_set_multicast_list, |
bc66154e | 575 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 576 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
577 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
578 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
54a30c97 SH |
579 | }; |
580 | ||
8a35747a | 581 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
582 | { |
583 | ether_setup(dev); | |
584 | ||
550fd08c | 585 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
54a30c97 | 586 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 587 | dev->destructor = free_netdev; |
3b04ddde | 588 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 | 589 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
590 | } |
591 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
592 | ||
593 | static void macvlan_setup(struct net_device *dev) | |
594 | { | |
595 | macvlan_common_setup(dev); | |
b863ceb7 PM |
596 | dev->tx_queue_len = 0; |
597 | } | |
598 | ||
599 | static int macvlan_port_create(struct net_device *dev) | |
600 | { | |
601 | struct macvlan_port *port; | |
602 | unsigned int i; | |
ab95bfe0 | 603 | int err; |
b863ceb7 PM |
604 | |
605 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
606 | return -EINVAL; | |
607 | ||
608 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
609 | if (port == NULL) | |
610 | return -ENOMEM; | |
611 | ||
eb06acdc | 612 | port->passthru = false; |
b863ceb7 PM |
613 | port->dev = dev; |
614 | INIT_LIST_HEAD(&port->vlans); | |
615 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
616 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 617 | |
a35e2c1b JP |
618 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
619 | if (err) | |
ab95bfe0 | 620 | kfree(port); |
d9351561 ED |
621 | else |
622 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 623 | return err; |
b863ceb7 PM |
624 | } |
625 | ||
626 | static void macvlan_port_destroy(struct net_device *dev) | |
627 | { | |
a35e2c1b | 628 | struct macvlan_port *port = macvlan_port_get(dev); |
b863ceb7 | 629 | |
a35e2c1b | 630 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 631 | netdev_rx_handler_unregister(dev); |
6e070aec | 632 | kfree_rcu(port, rcu); |
b863ceb7 PM |
633 | } |
634 | ||
b863ceb7 PM |
635 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
636 | { | |
637 | if (tb[IFLA_ADDRESS]) { | |
638 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
639 | return -EINVAL; | |
640 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
641 | return -EADDRNOTAVAIL; | |
642 | } | |
27c0b1a8 AB |
643 | |
644 | if (data && data[IFLA_MACVLAN_MODE]) { | |
645 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
646 | case MACVLAN_MODE_PRIVATE: | |
647 | case MACVLAN_MODE_VEPA: | |
648 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 649 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
650 | break; |
651 | default: | |
652 | return -EINVAL; | |
653 | } | |
654 | } | |
b863ceb7 PM |
655 | return 0; |
656 | } | |
657 | ||
fc0663d6 AB |
658 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
659 | struct nlattr *tb[], struct nlattr *data[], | |
660 | int (*receive)(struct sk_buff *skb), | |
661 | int (*forward)(struct net_device *dev, | |
662 | struct sk_buff *skb)) | |
b863ceb7 PM |
663 | { |
664 | struct macvlan_dev *vlan = netdev_priv(dev); | |
665 | struct macvlan_port *port; | |
666 | struct net_device *lowerdev; | |
667 | int err; | |
668 | ||
669 | if (!tb[IFLA_LINK]) | |
670 | return -EINVAL; | |
671 | ||
81adee47 | 672 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
673 | if (lowerdev == NULL) |
674 | return -ENODEV; | |
675 | ||
b0832a29 EB |
676 | /* When creating macvlans on top of other macvlans - use |
677 | * the real device as the lowerdev. | |
a6ca5f1d | 678 | */ |
b0832a29 EB |
679 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
680 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
681 | lowerdev = lowervlan->lowerdev; | |
682 | } | |
a6ca5f1d | 683 | |
b863ceb7 PM |
684 | if (!tb[IFLA_MTU]) |
685 | dev->mtu = lowerdev->mtu; | |
686 | else if (dev->mtu > lowerdev->mtu) | |
687 | return -EINVAL; | |
688 | ||
689 | if (!tb[IFLA_ADDRESS]) | |
690 | random_ether_addr(dev->dev_addr); | |
691 | ||
a35e2c1b | 692 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
693 | err = macvlan_port_create(lowerdev); |
694 | if (err < 0) | |
695 | return err; | |
696 | } | |
a35e2c1b | 697 | port = macvlan_port_get(lowerdev); |
b863ceb7 | 698 | |
eb06acdc SS |
699 | /* Only 1 macvlan device can be created in passthru mode */ |
700 | if (port->passthru) | |
701 | return -EINVAL; | |
702 | ||
b863ceb7 PM |
703 | vlan->lowerdev = lowerdev; |
704 | vlan->dev = dev; | |
705 | vlan->port = port; | |
fc0663d6 AB |
706 | vlan->receive = receive; |
707 | vlan->forward = forward; | |
b863ceb7 | 708 | |
27c0b1a8 AB |
709 | vlan->mode = MACVLAN_MODE_VEPA; |
710 | if (data && data[IFLA_MACVLAN_MODE]) | |
711 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
712 | ||
eb06acdc | 713 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
d5cd9244 | 714 | if (port->count) |
eb06acdc SS |
715 | return -EINVAL; |
716 | port->passthru = true; | |
717 | memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN); | |
718 | } | |
719 | ||
d5cd9244 | 720 | port->count += 1; |
b863ceb7 PM |
721 | err = register_netdevice(dev); |
722 | if (err < 0) | |
f16d3d57 | 723 | goto destroy_port; |
b863ceb7 PM |
724 | |
725 | list_add_tail(&vlan->list, &port->vlans); | |
fc4a7489 | 726 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 727 | |
b863ceb7 | 728 | return 0; |
f16d3d57 JP |
729 | |
730 | destroy_port: | |
d5cd9244 EB |
731 | port->count -= 1; |
732 | if (!port->count) | |
f16d3d57 JP |
733 | macvlan_port_destroy(lowerdev); |
734 | ||
735 | return err; | |
b863ceb7 | 736 | } |
fc0663d6 | 737 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 738 | |
fc0663d6 AB |
739 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
740 | struct nlattr *tb[], struct nlattr *data[]) | |
741 | { | |
742 | return macvlan_common_newlink(src_net, dev, tb, data, | |
743 | netif_rx, | |
744 | dev_forward_skb); | |
745 | } | |
746 | ||
747 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
748 | { |
749 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
750 | |
751 | list_del(&vlan->list); | |
23289a37 | 752 | unregister_netdevice_queue(dev, head); |
b863ceb7 | 753 | } |
fc0663d6 | 754 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 755 | |
27c0b1a8 AB |
756 | static int macvlan_changelink(struct net_device *dev, |
757 | struct nlattr *tb[], struct nlattr *data[]) | |
758 | { | |
759 | struct macvlan_dev *vlan = netdev_priv(dev); | |
760 | if (data && data[IFLA_MACVLAN_MODE]) | |
761 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
762 | return 0; | |
763 | } | |
764 | ||
765 | static size_t macvlan_get_size(const struct net_device *dev) | |
766 | { | |
767 | return nla_total_size(4); | |
768 | } | |
769 | ||
770 | static int macvlan_fill_info(struct sk_buff *skb, | |
771 | const struct net_device *dev) | |
772 | { | |
773 | struct macvlan_dev *vlan = netdev_priv(dev); | |
774 | ||
775 | NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); | |
776 | return 0; | |
777 | ||
778 | nla_put_failure: | |
779 | return -EMSGSIZE; | |
780 | } | |
781 | ||
782 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
783 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, | |
784 | }; | |
785 | ||
fc0663d6 AB |
786 | int macvlan_link_register(struct rtnl_link_ops *ops) |
787 | { | |
788 | /* common fields */ | |
789 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
790 | ops->validate = macvlan_validate; |
791 | ops->maxtype = IFLA_MACVLAN_MAX; | |
792 | ops->policy = macvlan_policy; | |
793 | ops->changelink = macvlan_changelink; | |
794 | ops->get_size = macvlan_get_size; | |
795 | ops->fill_info = macvlan_fill_info; | |
796 | ||
797 | return rtnl_link_register(ops); | |
798 | }; | |
799 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
800 | ||
801 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 802 | .kind = "macvlan", |
8a35747a | 803 | .setup = macvlan_setup, |
b863ceb7 PM |
804 | .newlink = macvlan_newlink, |
805 | .dellink = macvlan_dellink, | |
806 | }; | |
807 | ||
808 | static int macvlan_device_event(struct notifier_block *unused, | |
809 | unsigned long event, void *ptr) | |
810 | { | |
811 | struct net_device *dev = ptr; | |
812 | struct macvlan_dev *vlan, *next; | |
813 | struct macvlan_port *port; | |
226bd341 | 814 | LIST_HEAD(list_kill); |
b863ceb7 | 815 | |
a35e2c1b | 816 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
817 | return NOTIFY_DONE; |
818 | ||
a35e2c1b JP |
819 | port = macvlan_port_get(dev); |
820 | ||
b863ceb7 PM |
821 | switch (event) { |
822 | case NETDEV_CHANGE: | |
823 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
824 | netif_stacked_transfer_operstate(vlan->lowerdev, |
825 | vlan->dev); | |
b863ceb7 PM |
826 | break; |
827 | case NETDEV_FEAT_CHANGE: | |
828 | list_for_each_entry(vlan, &port->vlans, list) { | |
829 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 830 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
831 | netdev_features_change(vlan->dev); |
832 | } | |
833 | break; | |
834 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
835 | /* twiddle thumbs on netns device moves */ |
836 | if (dev->reg_state != NETREG_UNREGISTERING) | |
837 | break; | |
838 | ||
b863ceb7 | 839 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
840 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
841 | unregister_netdevice_many(&list_kill); | |
842 | list_del(&list_kill); | |
b863ceb7 | 843 | break; |
1c01fe14 JP |
844 | case NETDEV_PRE_TYPE_CHANGE: |
845 | /* Forbid underlaying device to change its type. */ | |
846 | return NOTIFY_BAD; | |
b863ceb7 PM |
847 | } |
848 | return NOTIFY_DONE; | |
849 | } | |
850 | ||
851 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
852 | .notifier_call = macvlan_device_event, | |
853 | }; | |
854 | ||
855 | static int __init macvlan_init_module(void) | |
856 | { | |
857 | int err; | |
858 | ||
859 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 860 | |
fc0663d6 | 861 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
862 | if (err < 0) |
863 | goto err1; | |
864 | return 0; | |
865 | err1: | |
b863ceb7 PM |
866 | unregister_netdevice_notifier(&macvlan_notifier_block); |
867 | return err; | |
868 | } | |
869 | ||
870 | static void __exit macvlan_cleanup_module(void) | |
871 | { | |
872 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
873 | unregister_netdevice_notifier(&macvlan_notifier_block); |
874 | } | |
875 | ||
876 | module_init(macvlan_init_module); | |
877 | module_exit(macvlan_cleanup_module); | |
878 | ||
879 | MODULE_LICENSE("GPL"); | |
880 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
881 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
882 | MODULE_ALIAS_RTNL_LINK("macvlan"); |