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