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