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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> | |
87002b03 | 29 | #include <linux/if_vlan.h> |
b863ceb7 PM |
30 | #include <linux/if_link.h> |
31 | #include <linux/if_macvlan.h> | |
cd431e73 | 32 | #include <linux/hash.h> |
b863ceb7 | 33 | #include <net/rtnetlink.h> |
618e1b74 | 34 | #include <net/xfrm.h> |
b863ceb7 PM |
35 | |
36 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) | |
37 | ||
38 | struct macvlan_port { | |
39 | struct net_device *dev; | |
40 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
41 | struct list_head vlans; | |
8b37ef0a | 42 | struct rcu_head rcu; |
eb06acdc | 43 | bool passthru; |
d5cd9244 | 44 | int count; |
b863ceb7 PM |
45 | }; |
46 | ||
d5cd9244 EB |
47 | static void macvlan_port_destroy(struct net_device *dev); |
48 | ||
e052f7e6 ED |
49 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
50 | { | |
51 | return rcu_dereference(dev->rx_handler_data); | |
52 | } | |
53 | ||
54 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
55 | { | |
56 | return rtnl_dereference(dev->rx_handler_data); | |
57 | } | |
58 | ||
a35e2c1b JP |
59 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
60 | ||
b863ceb7 PM |
61 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
62 | const unsigned char *addr) | |
63 | { | |
64 | struct macvlan_dev *vlan; | |
b863ceb7 | 65 | |
b67bfe0d | 66 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[addr[5]], hlist) { |
a6700db1 | 67 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
68 | return vlan; |
69 | } | |
70 | return NULL; | |
71 | } | |
72 | ||
f9ac30f0 EB |
73 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
74 | { | |
75 | struct macvlan_port *port = vlan->port; | |
76 | const unsigned char *addr = vlan->dev->dev_addr; | |
77 | ||
78 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
79 | } | |
80 | ||
449f4544 | 81 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
82 | { |
83 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
84 | if (sync) |
85 | synchronize_rcu(); | |
f9ac30f0 EB |
86 | } |
87 | ||
88 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
89 | const unsigned char *addr) | |
90 | { | |
449f4544 | 91 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
92 | /* Now that we are unhashed it is safe to change the device |
93 | * address without confusing packet delivery. | |
94 | */ | |
95 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
96 | macvlan_hash_add(vlan); | |
97 | } | |
98 | ||
99 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
100 | const unsigned char *addr) | |
101 | { | |
102 | /* Test to see if the specified multicast address is | |
103 | * currently in use by the underlying device or | |
104 | * another macvlan. | |
105 | */ | |
a6700db1 | 106 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
107 | return 1; |
108 | ||
109 | if (macvlan_hash_lookup(port, addr)) | |
110 | return 1; | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
a1e514c5 | 115 | |
fc0663d6 AB |
116 | static int macvlan_broadcast_one(struct sk_buff *skb, |
117 | const struct macvlan_dev *vlan, | |
618e1b74 | 118 | const struct ethhdr *eth, bool local) |
a1e514c5 | 119 | { |
fc0663d6 | 120 | struct net_device *dev = vlan->dev; |
a1e514c5 | 121 | |
618e1b74 | 122 | if (local) |
fc0663d6 | 123 | return vlan->forward(dev, skb); |
618e1b74 | 124 | |
a1e514c5 | 125 | skb->dev = dev; |
a6700db1 | 126 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
127 | skb->pkt_type = PACKET_BROADCAST; |
128 | else | |
129 | skb->pkt_type = PACKET_MULTICAST; | |
130 | ||
fc0663d6 | 131 | return vlan->receive(skb); |
a1e514c5 AB |
132 | } |
133 | ||
3807ff58 ED |
134 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
135 | { | |
136 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
137 | } | |
138 | ||
139 | ||
140 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
141 | const unsigned char *addr) | |
cd431e73 ED |
142 | { |
143 | u32 val = __get_unaligned_cpu32(addr + 2); | |
144 | ||
3807ff58 | 145 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
146 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
147 | } | |
148 | ||
b863ceb7 | 149 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
150 | const struct macvlan_port *port, |
151 | struct net_device *src, | |
152 | enum macvlan_mode mode) | |
b863ceb7 PM |
153 | { |
154 | const struct ethhdr *eth = eth_hdr(skb); | |
155 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
156 | struct sk_buff *nskb; |
157 | unsigned int i; | |
a1e514c5 | 158 | int err; |
3807ff58 | 159 | unsigned int hash; |
b863ceb7 | 160 | |
efbbced3 PM |
161 | if (skb->protocol == htons(ETH_P_PAUSE)) |
162 | return; | |
163 | ||
b863ceb7 | 164 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 165 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
166 | if (vlan->dev == src || !(vlan->mode & mode)) |
167 | continue; | |
168 | ||
3807ff58 | 169 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
170 | if (!test_bit(hash, vlan->mc_filter)) |
171 | continue; | |
de9e8f3f HX |
172 | |
173 | err = NET_RX_DROP; | |
b863ceb7 | 174 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
175 | if (likely(nskb)) |
176 | err = macvlan_broadcast_one( | |
177 | nskb, vlan, eth, | |
178 | mode == MACVLAN_MODE_BRIDGE); | |
a1e514c5 AB |
179 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
180 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
181 | } |
182 | } | |
183 | } | |
184 | ||
185 | /* called under rcu_read_lock() from netif_receive_skb */ | |
8a4eb573 | 186 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) |
b863ceb7 | 187 | { |
ab95bfe0 | 188 | struct macvlan_port *port; |
8a4eb573 | 189 | struct sk_buff *skb = *pskb; |
b863ceb7 | 190 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 191 | const struct macvlan_dev *vlan; |
618e1b74 | 192 | const struct macvlan_dev *src; |
b863ceb7 | 193 | struct net_device *dev; |
ba01877f SS |
194 | unsigned int len = 0; |
195 | int ret = NET_RX_DROP; | |
b863ceb7 | 196 | |
a35e2c1b | 197 | port = macvlan_port_get_rcu(skb->dev); |
b863ceb7 | 198 | if (is_multicast_ether_addr(eth->h_dest)) { |
bc416d97 ED |
199 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); |
200 | if (!skb) | |
201 | return RX_HANDLER_CONSUMED; | |
4ec7ac12 | 202 | eth = eth_hdr(skb); |
618e1b74 AB |
203 | src = macvlan_hash_lookup(port, eth->h_source); |
204 | if (!src) | |
205 | /* frame comes from an external address */ | |
206 | macvlan_broadcast(skb, port, NULL, | |
207 | MACVLAN_MODE_PRIVATE | | |
208 | MACVLAN_MODE_VEPA | | |
eb06acdc | 209 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
210 | MACVLAN_MODE_BRIDGE); |
211 | else if (src->mode == MACVLAN_MODE_VEPA) | |
212 | /* flood to everyone except source */ | |
213 | macvlan_broadcast(skb, port, src->dev, | |
214 | MACVLAN_MODE_VEPA | | |
215 | MACVLAN_MODE_BRIDGE); | |
216 | else if (src->mode == MACVLAN_MODE_BRIDGE) | |
217 | /* | |
218 | * flood only to VEPA ports, bridge ports | |
219 | * already saw the frame on the way out. | |
220 | */ | |
221 | macvlan_broadcast(skb, port, src->dev, | |
222 | MACVLAN_MODE_VEPA); | |
729e72a1 | 223 | else { |
224 | /* forward to original port. */ | |
225 | vlan = src; | |
226 | ret = macvlan_broadcast_one(skb, vlan, eth, 0); | |
227 | goto out; | |
228 | } | |
229 | ||
8a4eb573 | 230 | return RX_HANDLER_PASS; |
b863ceb7 PM |
231 | } |
232 | ||
eb06acdc | 233 | if (port->passthru) |
233c7df0 JP |
234 | vlan = list_first_or_null_rcu(&port->vlans, |
235 | struct macvlan_dev, list); | |
eb06acdc SS |
236 | else |
237 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 238 | if (vlan == NULL) |
8a4eb573 | 239 | return RX_HANDLER_PASS; |
b863ceb7 PM |
240 | |
241 | dev = vlan->dev; | |
242 | if (unlikely(!(dev->flags & IFF_UP))) { | |
243 | kfree_skb(skb); | |
8a4eb573 | 244 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 245 | } |
a1e514c5 | 246 | len = skb->len + ETH_HLEN; |
b863ceb7 | 247 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 248 | if (!skb) |
ba01877f | 249 | goto out; |
b863ceb7 PM |
250 | |
251 | skb->dev = dev; | |
252 | skb->pkt_type = PACKET_HOST; | |
253 | ||
ba01877f SS |
254 | ret = vlan->receive(skb); |
255 | ||
256 | out: | |
257 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 258 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
259 | } |
260 | ||
618e1b74 AB |
261 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
262 | { | |
263 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
264 | const struct macvlan_port *port = vlan->port; | |
265 | const struct macvlan_dev *dest; | |
12a2856b | 266 | __u8 ip_summed = skb->ip_summed; |
618e1b74 AB |
267 | |
268 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
269 | const struct ethhdr *eth = (void *)skb->data; | |
12a2856b | 270 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
618e1b74 AB |
271 | |
272 | /* send to other bridge ports directly */ | |
273 | if (is_multicast_ether_addr(eth->h_dest)) { | |
274 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
275 | goto xmit_world; | |
276 | } | |
277 | ||
278 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
279 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 280 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 281 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
282 | |
283 | return NET_XMIT_SUCCESS; | |
284 | } | |
285 | } | |
286 | ||
287 | xmit_world: | |
12a2856b | 288 | skb->ip_summed = ip_summed; |
59b9997b | 289 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
290 | return dev_queue_xmit(skb); |
291 | } | |
292 | ||
fc0663d6 AB |
293 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
294 | struct net_device *dev) | |
b863ceb7 | 295 | { |
b863ceb7 PM |
296 | unsigned int len = skb->len; |
297 | int ret; | |
8ffab51b | 298 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 299 | |
618e1b74 | 300 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 301 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
8ffab51b | 302 | struct macvlan_pcpu_stats *pcpu_stats; |
2c114553 | 303 | |
8ffab51b ED |
304 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
305 | u64_stats_update_begin(&pcpu_stats->syncp); | |
306 | pcpu_stats->tx_packets++; | |
307 | pcpu_stats->tx_bytes += len; | |
308 | u64_stats_update_end(&pcpu_stats->syncp); | |
309 | } else { | |
310 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
311 | } | |
cbbef5e1 | 312 | return ret; |
b863ceb7 | 313 | } |
fc0663d6 | 314 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
315 | |
316 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
317 | unsigned short type, const void *daddr, |
318 | const void *saddr, unsigned len) | |
b863ceb7 PM |
319 | { |
320 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
321 | struct net_device *lowerdev = vlan->lowerdev; | |
322 | ||
0c4e8581 SH |
323 | return dev_hard_header(skb, lowerdev, type, daddr, |
324 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
325 | } |
326 | ||
3b04ddde SH |
327 | static const struct header_ops macvlan_hard_header_ops = { |
328 | .create = macvlan_hard_header, | |
329 | .rebuild = eth_rebuild_header, | |
330 | .parse = eth_header_parse, | |
3b04ddde SH |
331 | .cache = eth_header_cache, |
332 | .cache_update = eth_header_cache_update, | |
333 | }; | |
334 | ||
b863ceb7 PM |
335 | static int macvlan_open(struct net_device *dev) |
336 | { | |
337 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
338 | struct net_device *lowerdev = vlan->lowerdev; |
339 | int err; | |
340 | ||
eb06acdc | 341 | if (vlan->port->passthru) { |
78738141 MT |
342 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
343 | err = dev_set_promiscuity(lowerdev, 1); | |
344 | if (err < 0) | |
345 | goto out; | |
346 | } | |
eb06acdc SS |
347 | goto hash_add; |
348 | } | |
349 | ||
f9ac30f0 EB |
350 | err = -EBUSY; |
351 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
352 | goto out; | |
353 | ||
a748ee24 | 354 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 355 | if (err < 0) |
b89fb7da WC |
356 | goto out; |
357 | if (dev->flags & IFF_ALLMULTI) { | |
358 | err = dev_set_allmulti(lowerdev, 1); | |
359 | if (err < 0) | |
360 | goto del_unicast; | |
361 | } | |
eb06acdc SS |
362 | |
363 | hash_add: | |
f9ac30f0 | 364 | macvlan_hash_add(vlan); |
b863ceb7 | 365 | return 0; |
b89fb7da WC |
366 | |
367 | del_unicast: | |
a748ee24 | 368 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
369 | out: |
370 | return err; | |
b863ceb7 PM |
371 | } |
372 | ||
373 | static int macvlan_stop(struct net_device *dev) | |
374 | { | |
375 | struct macvlan_dev *vlan = netdev_priv(dev); | |
376 | struct net_device *lowerdev = vlan->lowerdev; | |
377 | ||
df8ef8f3 JF |
378 | dev_uc_unsync(lowerdev, dev); |
379 | dev_mc_unsync(lowerdev, dev); | |
380 | ||
eb06acdc | 381 | if (vlan->port->passthru) { |
df8ef8f3 JF |
382 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
383 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
384 | goto hash_del; |
385 | } | |
386 | ||
b863ceb7 PM |
387 | if (dev->flags & IFF_ALLMULTI) |
388 | dev_set_allmulti(lowerdev, -1); | |
389 | ||
a748ee24 | 390 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 391 | |
eb06acdc | 392 | hash_del: |
449f4544 | 393 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
394 | return 0; |
395 | } | |
396 | ||
ad5d20a6 PM |
397 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
398 | { | |
399 | struct macvlan_dev *vlan = netdev_priv(dev); | |
400 | struct net_device *lowerdev = vlan->lowerdev; | |
401 | struct sockaddr *addr = p; | |
402 | int err; | |
403 | ||
404 | if (!is_valid_ether_addr(addr->sa_data)) | |
405 | return -EADDRNOTAVAIL; | |
406 | ||
f9ac30f0 EB |
407 | if (!(dev->flags & IFF_UP)) { |
408 | /* Just copy in the new address */ | |
409 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
410 | } else { | |
411 | /* Rehash and update the device filters */ | |
412 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
413 | return -EBUSY; | |
ad5d20a6 | 414 | |
a748ee24 | 415 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 416 | if (err) |
f9ac30f0 | 417 | return err; |
ad5d20a6 | 418 | |
a748ee24 | 419 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
420 | |
421 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
422 | } | |
ad5d20a6 PM |
423 | return 0; |
424 | } | |
425 | ||
b863ceb7 PM |
426 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
427 | { | |
428 | struct macvlan_dev *vlan = netdev_priv(dev); | |
429 | struct net_device *lowerdev = vlan->lowerdev; | |
430 | ||
431 | if (change & IFF_ALLMULTI) | |
432 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
433 | } | |
434 | ||
df8ef8f3 | 435 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
436 | { |
437 | struct macvlan_dev *vlan = netdev_priv(dev); | |
438 | ||
cd431e73 ED |
439 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
440 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
441 | } else { | |
442 | struct netdev_hw_addr *ha; | |
443 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
444 | ||
445 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
446 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 447 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 448 | } |
d5270430 | 449 | |
3807ff58 | 450 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 451 | |
cd431e73 ED |
452 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
453 | } | |
df8ef8f3 | 454 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
455 | dev_mc_sync(vlan->lowerdev, dev); |
456 | } | |
457 | ||
458 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
459 | { | |
460 | struct macvlan_dev *vlan = netdev_priv(dev); | |
461 | ||
462 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
463 | return -EINVAL; | |
464 | dev->mtu = new_mtu; | |
465 | return 0; | |
466 | } | |
467 | ||
468 | /* | |
469 | * macvlan network devices have devices nesting below it and are a special | |
470 | * "super class" of normal network devices; split their locks off into a | |
471 | * separate class since they always nest. | |
472 | */ | |
473 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 474 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
475 | |
476 | #define MACVLAN_FEATURES \ | |
477 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
478 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 | 479 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 480 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
481 | |
482 | #define MACVLAN_STATE_MASK \ | |
483 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
484 | ||
e8a0464c DM |
485 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
486 | struct netdev_queue *txq, | |
487 | void *_unused) | |
c773e847 DM |
488 | { |
489 | lockdep_set_class(&txq->_xmit_lock, | |
490 | &macvlan_netdev_xmit_lock_key); | |
491 | } | |
492 | ||
493 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
494 | { | |
cf508b12 DM |
495 | lockdep_set_class(&dev->addr_list_lock, |
496 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 497 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
498 | } |
499 | ||
b863ceb7 PM |
500 | static int macvlan_init(struct net_device *dev) |
501 | { | |
502 | struct macvlan_dev *vlan = netdev_priv(dev); | |
503 | const struct net_device *lowerdev = vlan->lowerdev; | |
504 | ||
505 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
506 | (lowerdev->state & MACVLAN_STATE_MASK); | |
507 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8ffab51b | 508 | dev->features |= NETIF_F_LLTX; |
8c2acc53 | 509 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 510 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 511 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 512 | |
c773e847 DM |
513 | macvlan_set_lockdep_class(dev); |
514 | ||
8ffab51b ED |
515 | vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); |
516 | if (!vlan->pcpu_stats) | |
fccaf710 ED |
517 | return -ENOMEM; |
518 | ||
b863ceb7 PM |
519 | return 0; |
520 | } | |
521 | ||
fccaf710 ED |
522 | static void macvlan_uninit(struct net_device *dev) |
523 | { | |
524 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 525 | struct macvlan_port *port = vlan->port; |
fccaf710 | 526 | |
8ffab51b | 527 | free_percpu(vlan->pcpu_stats); |
d5cd9244 EB |
528 | |
529 | port->count -= 1; | |
530 | if (!port->count) | |
531 | macvlan_port_destroy(port->dev); | |
fccaf710 ED |
532 | } |
533 | ||
28172739 ED |
534 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
535 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 536 | { |
fccaf710 ED |
537 | struct macvlan_dev *vlan = netdev_priv(dev); |
538 | ||
8ffab51b ED |
539 | if (vlan->pcpu_stats) { |
540 | struct macvlan_pcpu_stats *p; | |
541 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
542 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 543 | unsigned int start; |
fccaf710 ED |
544 | int i; |
545 | ||
546 | for_each_possible_cpu(i) { | |
8ffab51b | 547 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e ED |
548 | do { |
549 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
550 | rx_packets = p->rx_packets; | |
551 | rx_bytes = p->rx_bytes; | |
552 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
553 | tx_packets = p->tx_packets; |
554 | tx_bytes = p->tx_bytes; | |
bc66154e | 555 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
8ffab51b ED |
556 | |
557 | stats->rx_packets += rx_packets; | |
558 | stats->rx_bytes += rx_bytes; | |
559 | stats->multicast += rx_multicast; | |
560 | stats->tx_packets += tx_packets; | |
561 | stats->tx_bytes += tx_bytes; | |
562 | /* rx_errors & tx_dropped are u32, updated | |
563 | * without syncp protection. | |
564 | */ | |
565 | rx_errors += p->rx_errors; | |
566 | tx_dropped += p->tx_dropped; | |
fccaf710 | 567 | } |
8ffab51b ED |
568 | stats->rx_errors = rx_errors; |
569 | stats->rx_dropped = rx_errors; | |
570 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
571 | } |
572 | return stats; | |
573 | } | |
574 | ||
8e586137 | 575 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 576 | __be16 proto, u16 vid) |
8d13e670 JF |
577 | { |
578 | struct macvlan_dev *vlan = netdev_priv(dev); | |
579 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 580 | |
80d5c368 | 581 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
582 | } |
583 | ||
8e586137 | 584 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 585 | __be16 proto, u16 vid) |
8d13e670 JF |
586 | { |
587 | struct macvlan_dev *vlan = netdev_priv(dev); | |
588 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 589 | |
80d5c368 | 590 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 591 | return 0; |
8d13e670 JF |
592 | } |
593 | ||
edc7d573 | 594 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 595 | struct net_device *dev, |
6b6e2725 | 596 | const unsigned char *addr, |
df8ef8f3 JF |
597 | u16 flags) |
598 | { | |
599 | struct macvlan_dev *vlan = netdev_priv(dev); | |
600 | int err = -EINVAL; | |
601 | ||
602 | if (!vlan->port->passthru) | |
603 | return -EOPNOTSUPP; | |
604 | ||
ab2cfbb2 TR |
605 | if (flags & NLM_F_REPLACE) |
606 | return -EOPNOTSUPP; | |
607 | ||
df8ef8f3 JF |
608 | if (is_unicast_ether_addr(addr)) |
609 | err = dev_uc_add_excl(dev, addr); | |
610 | else if (is_multicast_ether_addr(addr)) | |
611 | err = dev_mc_add_excl(dev, addr); | |
612 | ||
613 | return err; | |
614 | } | |
615 | ||
1690be63 | 616 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 617 | struct net_device *dev, |
6b6e2725 | 618 | const unsigned char *addr) |
df8ef8f3 JF |
619 | { |
620 | struct macvlan_dev *vlan = netdev_priv(dev); | |
621 | int err = -EINVAL; | |
622 | ||
623 | if (!vlan->port->passthru) | |
624 | return -EOPNOTSUPP; | |
625 | ||
626 | if (is_unicast_ether_addr(addr)) | |
627 | err = dev_uc_del(dev, addr); | |
628 | else if (is_multicast_ether_addr(addr)) | |
629 | err = dev_mc_del(dev, addr); | |
630 | ||
631 | return err; | |
632 | } | |
633 | ||
b863ceb7 PM |
634 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
635 | struct ethtool_drvinfo *drvinfo) | |
636 | { | |
7826d43f JP |
637 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
638 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
639 | } |
640 | ||
9edb8bb6 SH |
641 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
642 | struct ethtool_cmd *cmd) | |
643 | { | |
644 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
645 | |
646 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
647 | } |
648 | ||
2be5c767 VY |
649 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
650 | netdev_features_t features) | |
651 | { | |
652 | struct macvlan_dev *vlan = netdev_priv(dev); | |
653 | ||
654 | return features & (vlan->set_features | ~MACVLAN_FEATURES); | |
655 | } | |
656 | ||
b863ceb7 PM |
657 | static const struct ethtool_ops macvlan_ethtool_ops = { |
658 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 659 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
660 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
661 | }; | |
662 | ||
54a30c97 SH |
663 | static const struct net_device_ops macvlan_netdev_ops = { |
664 | .ndo_init = macvlan_init, | |
fccaf710 | 665 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
666 | .ndo_open = macvlan_open, |
667 | .ndo_stop = macvlan_stop, | |
00829823 | 668 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 669 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 670 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
671 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
672 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 673 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 674 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 675 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
676 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
677 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
678 | .ndo_fdb_add = macvlan_fdb_add, |
679 | .ndo_fdb_del = macvlan_fdb_del, | |
680 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
54a30c97 SH |
681 | }; |
682 | ||
8a35747a | 683 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
684 | { |
685 | ether_setup(dev); | |
686 | ||
550fd08c | 687 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
87ab7f6f | 688 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 689 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 690 | dev->destructor = free_netdev; |
71740129 | 691 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 692 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
693 | } |
694 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
695 | ||
696 | static void macvlan_setup(struct net_device *dev) | |
697 | { | |
698 | macvlan_common_setup(dev); | |
b863ceb7 PM |
699 | dev->tx_queue_len = 0; |
700 | } | |
701 | ||
702 | static int macvlan_port_create(struct net_device *dev) | |
703 | { | |
704 | struct macvlan_port *port; | |
705 | unsigned int i; | |
ab95bfe0 | 706 | int err; |
b863ceb7 PM |
707 | |
708 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
709 | return -EINVAL; | |
710 | ||
711 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
712 | if (port == NULL) | |
713 | return -ENOMEM; | |
714 | ||
eb06acdc | 715 | port->passthru = false; |
b863ceb7 PM |
716 | port->dev = dev; |
717 | INIT_LIST_HEAD(&port->vlans); | |
718 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
719 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 720 | |
a35e2c1b JP |
721 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
722 | if (err) | |
ab95bfe0 | 723 | kfree(port); |
d9351561 ED |
724 | else |
725 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 726 | return err; |
b863ceb7 PM |
727 | } |
728 | ||
729 | static void macvlan_port_destroy(struct net_device *dev) | |
730 | { | |
e052f7e6 | 731 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
b863ceb7 | 732 | |
a35e2c1b | 733 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 734 | netdev_rx_handler_unregister(dev); |
6e070aec | 735 | kfree_rcu(port, rcu); |
b863ceb7 PM |
736 | } |
737 | ||
b863ceb7 PM |
738 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
739 | { | |
740 | if (tb[IFLA_ADDRESS]) { | |
741 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
742 | return -EINVAL; | |
743 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
744 | return -EADDRNOTAVAIL; | |
745 | } | |
27c0b1a8 | 746 | |
15127478 MT |
747 | if (data && data[IFLA_MACVLAN_FLAGS] && |
748 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) | |
749 | return -EINVAL; | |
750 | ||
27c0b1a8 AB |
751 | if (data && data[IFLA_MACVLAN_MODE]) { |
752 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
753 | case MACVLAN_MODE_PRIVATE: | |
754 | case MACVLAN_MODE_VEPA: | |
755 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 756 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
757 | break; |
758 | default: | |
759 | return -EINVAL; | |
760 | } | |
761 | } | |
b863ceb7 PM |
762 | return 0; |
763 | } | |
764 | ||
fc0663d6 AB |
765 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
766 | struct nlattr *tb[], struct nlattr *data[], | |
767 | int (*receive)(struct sk_buff *skb), | |
768 | int (*forward)(struct net_device *dev, | |
769 | struct sk_buff *skb)) | |
b863ceb7 PM |
770 | { |
771 | struct macvlan_dev *vlan = netdev_priv(dev); | |
772 | struct macvlan_port *port; | |
773 | struct net_device *lowerdev; | |
774 | int err; | |
775 | ||
776 | if (!tb[IFLA_LINK]) | |
777 | return -EINVAL; | |
778 | ||
81adee47 | 779 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
780 | if (lowerdev == NULL) |
781 | return -ENODEV; | |
782 | ||
b0832a29 EB |
783 | /* When creating macvlans on top of other macvlans - use |
784 | * the real device as the lowerdev. | |
a6ca5f1d | 785 | */ |
b0832a29 EB |
786 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
787 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
788 | lowerdev = lowervlan->lowerdev; | |
789 | } | |
a6ca5f1d | 790 | |
b863ceb7 PM |
791 | if (!tb[IFLA_MTU]) |
792 | dev->mtu = lowerdev->mtu; | |
793 | else if (dev->mtu > lowerdev->mtu) | |
794 | return -EINVAL; | |
795 | ||
796 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 797 | eth_hw_addr_random(dev); |
b863ceb7 | 798 | |
a35e2c1b | 799 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
800 | err = macvlan_port_create(lowerdev); |
801 | if (err < 0) | |
802 | return err; | |
803 | } | |
e052f7e6 | 804 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 805 | |
eb06acdc SS |
806 | /* Only 1 macvlan device can be created in passthru mode */ |
807 | if (port->passthru) | |
808 | return -EINVAL; | |
809 | ||
b863ceb7 PM |
810 | vlan->lowerdev = lowerdev; |
811 | vlan->dev = dev; | |
812 | vlan->port = port; | |
fc0663d6 AB |
813 | vlan->receive = receive; |
814 | vlan->forward = forward; | |
2be5c767 | 815 | vlan->set_features = MACVLAN_FEATURES; |
b863ceb7 | 816 | |
27c0b1a8 AB |
817 | vlan->mode = MACVLAN_MODE_VEPA; |
818 | if (data && data[IFLA_MACVLAN_MODE]) | |
819 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
820 | ||
df8ef8f3 JF |
821 | if (data && data[IFLA_MACVLAN_FLAGS]) |
822 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
823 | ||
eb06acdc | 824 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
d5cd9244 | 825 | if (port->count) |
eb06acdc SS |
826 | return -EINVAL; |
827 | port->passthru = true; | |
8b98604e | 828 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
829 | } |
830 | ||
7cd43db7 JP |
831 | err = netdev_upper_dev_link(lowerdev, dev); |
832 | if (err) | |
833 | goto destroy_port; | |
834 | ||
d5cd9244 | 835 | port->count += 1; |
b863ceb7 PM |
836 | err = register_netdevice(dev); |
837 | if (err < 0) | |
7cd43db7 | 838 | goto upper_dev_unlink; |
b863ceb7 | 839 | |
233c7df0 | 840 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 841 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 842 | |
b863ceb7 | 843 | return 0; |
f16d3d57 | 844 | |
7cd43db7 JP |
845 | upper_dev_unlink: |
846 | netdev_upper_dev_unlink(lowerdev, dev); | |
f16d3d57 | 847 | destroy_port: |
d5cd9244 EB |
848 | port->count -= 1; |
849 | if (!port->count) | |
f16d3d57 JP |
850 | macvlan_port_destroy(lowerdev); |
851 | ||
852 | return err; | |
b863ceb7 | 853 | } |
fc0663d6 | 854 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 855 | |
fc0663d6 AB |
856 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
857 | struct nlattr *tb[], struct nlattr *data[]) | |
858 | { | |
859 | return macvlan_common_newlink(src_net, dev, tb, data, | |
860 | netif_rx, | |
861 | dev_forward_skb); | |
862 | } | |
863 | ||
864 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
865 | { |
866 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 867 | |
233c7df0 | 868 | list_del_rcu(&vlan->list); |
23289a37 | 869 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 870 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 871 | } |
fc0663d6 | 872 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 873 | |
27c0b1a8 AB |
874 | static int macvlan_changelink(struct net_device *dev, |
875 | struct nlattr *tb[], struct nlattr *data[]) | |
876 | { | |
877 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
878 | enum macvlan_mode mode; |
879 | bool set_mode = false; | |
880 | ||
881 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
882 | if (data && data[IFLA_MACVLAN_MODE]) { | |
883 | set_mode = true; | |
884 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
885 | /* Passthrough mode can't be set or cleared dynamically */ | |
886 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
887 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
888 | return -EINVAL; | |
889 | } | |
99ffc3e7 | 890 | |
df8ef8f3 JF |
891 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
892 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
893 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
99ffc3e7 MT |
894 | if (vlan->port->passthru && promisc) { |
895 | int err; | |
896 | ||
897 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
898 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
899 | else | |
900 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
901 | if (err < 0) | |
902 | return err; | |
903 | } | |
df8ef8f3 JF |
904 | vlan->flags = flags; |
905 | } | |
266e8347 MT |
906 | if (set_mode) |
907 | vlan->mode = mode; | |
27c0b1a8 AB |
908 | return 0; |
909 | } | |
910 | ||
911 | static size_t macvlan_get_size(const struct net_device *dev) | |
912 | { | |
01fe944f ED |
913 | return (0 |
914 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
915 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
916 | ); | |
27c0b1a8 AB |
917 | } |
918 | ||
919 | static int macvlan_fill_info(struct sk_buff *skb, | |
920 | const struct net_device *dev) | |
921 | { | |
922 | struct macvlan_dev *vlan = netdev_priv(dev); | |
923 | ||
ead9a76c DM |
924 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
925 | goto nla_put_failure; | |
df8ef8f3 JF |
926 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
927 | goto nla_put_failure; | |
27c0b1a8 AB |
928 | return 0; |
929 | ||
930 | nla_put_failure: | |
931 | return -EMSGSIZE; | |
932 | } | |
933 | ||
934 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
935 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
936 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
27c0b1a8 AB |
937 | }; |
938 | ||
fc0663d6 AB |
939 | int macvlan_link_register(struct rtnl_link_ops *ops) |
940 | { | |
941 | /* common fields */ | |
942 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
943 | ops->validate = macvlan_validate; |
944 | ops->maxtype = IFLA_MACVLAN_MAX; | |
945 | ops->policy = macvlan_policy; | |
946 | ops->changelink = macvlan_changelink; | |
947 | ops->get_size = macvlan_get_size; | |
948 | ops->fill_info = macvlan_fill_info; | |
949 | ||
950 | return rtnl_link_register(ops); | |
951 | }; | |
952 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
953 | ||
954 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 955 | .kind = "macvlan", |
8a35747a | 956 | .setup = macvlan_setup, |
b863ceb7 PM |
957 | .newlink = macvlan_newlink, |
958 | .dellink = macvlan_dellink, | |
959 | }; | |
960 | ||
961 | static int macvlan_device_event(struct notifier_block *unused, | |
962 | unsigned long event, void *ptr) | |
963 | { | |
351638e7 | 964 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
965 | struct macvlan_dev *vlan, *next; |
966 | struct macvlan_port *port; | |
226bd341 | 967 | LIST_HEAD(list_kill); |
b863ceb7 | 968 | |
a35e2c1b | 969 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
970 | return NOTIFY_DONE; |
971 | ||
e052f7e6 | 972 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 973 | |
b863ceb7 PM |
974 | switch (event) { |
975 | case NETDEV_CHANGE: | |
976 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
977 | netif_stacked_transfer_operstate(vlan->lowerdev, |
978 | vlan->dev); | |
b863ceb7 PM |
979 | break; |
980 | case NETDEV_FEAT_CHANGE: | |
981 | list_for_each_entry(vlan, &port->vlans, list) { | |
982 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 983 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
984 | netdev_features_change(vlan->dev); |
985 | } | |
986 | break; | |
987 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
988 | /* twiddle thumbs on netns device moves */ |
989 | if (dev->reg_state != NETREG_UNREGISTERING) | |
990 | break; | |
991 | ||
b863ceb7 | 992 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
993 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
994 | unregister_netdevice_many(&list_kill); | |
995 | list_del(&list_kill); | |
b863ceb7 | 996 | break; |
1c01fe14 JP |
997 | case NETDEV_PRE_TYPE_CHANGE: |
998 | /* Forbid underlaying device to change its type. */ | |
999 | return NOTIFY_BAD; | |
b863ceb7 PM |
1000 | } |
1001 | return NOTIFY_DONE; | |
1002 | } | |
1003 | ||
1004 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1005 | .notifier_call = macvlan_device_event, | |
1006 | }; | |
1007 | ||
1008 | static int __init macvlan_init_module(void) | |
1009 | { | |
1010 | int err; | |
1011 | ||
1012 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1013 | |
fc0663d6 | 1014 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1015 | if (err < 0) |
1016 | goto err1; | |
1017 | return 0; | |
1018 | err1: | |
b863ceb7 PM |
1019 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1020 | return err; | |
1021 | } | |
1022 | ||
1023 | static void __exit macvlan_cleanup_module(void) | |
1024 | { | |
1025 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1026 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1027 | } | |
1028 | ||
1029 | module_init(macvlan_init_module); | |
1030 | module_exit(macvlan_cleanup_module); | |
1031 | ||
1032 | MODULE_LICENSE("GPL"); | |
1033 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1034 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1035 | MODULE_ALIAS_RTNL_LINK("macvlan"); |