Commit | Line | Data |
---|---|---|
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) |
2f6a1b66 | 123 | return dev_forward_skb(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 | ||
2f6a1b66 | 131 | return netif_rx(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 | ||
2f6a1b66 | 254 | ret = netif_rx(skb); |
ba01877f SS |
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; | |
266 | ||
267 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
268 | const struct ethhdr *eth = (void *)skb->data; | |
269 | ||
270 | /* send to other bridge ports directly */ | |
271 | if (is_multicast_ether_addr(eth->h_dest)) { | |
272 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
273 | goto xmit_world; | |
274 | } | |
275 | ||
276 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
277 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 278 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 279 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
280 | |
281 | return NET_XMIT_SUCCESS; | |
282 | } | |
283 | } | |
284 | ||
285 | xmit_world: | |
59b9997b | 286 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
287 | return dev_queue_xmit(skb); |
288 | } | |
289 | ||
0db901bd | 290 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
291 | struct net_device *dev) | |
b863ceb7 | 292 | { |
b863ceb7 PM |
293 | unsigned int len = skb->len; |
294 | int ret; | |
8ffab51b | 295 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 296 | |
a6cc0cfa JF |
297 | if (vlan->fwd_priv) { |
298 | skb->dev = vlan->lowerdev; | |
f663dd9a | 299 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
a6cc0cfa JF |
300 | } else { |
301 | ret = macvlan_queue_xmit(skb, dev); | |
302 | } | |
303 | ||
2d6c9ffc | 304 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 305 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 306 | |
8ffab51b ED |
307 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
308 | u64_stats_update_begin(&pcpu_stats->syncp); | |
309 | pcpu_stats->tx_packets++; | |
310 | pcpu_stats->tx_bytes += len; | |
311 | u64_stats_update_end(&pcpu_stats->syncp); | |
312 | } else { | |
313 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
314 | } | |
cbbef5e1 | 315 | return ret; |
b863ceb7 PM |
316 | } |
317 | ||
318 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
319 | unsigned short type, const void *daddr, |
320 | const void *saddr, unsigned len) | |
b863ceb7 PM |
321 | { |
322 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
323 | struct net_device *lowerdev = vlan->lowerdev; | |
324 | ||
0c4e8581 SH |
325 | return dev_hard_header(skb, lowerdev, type, daddr, |
326 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
327 | } |
328 | ||
3b04ddde SH |
329 | static const struct header_ops macvlan_hard_header_ops = { |
330 | .create = macvlan_hard_header, | |
331 | .rebuild = eth_rebuild_header, | |
332 | .parse = eth_header_parse, | |
3b04ddde SH |
333 | .cache = eth_header_cache, |
334 | .cache_update = eth_header_cache_update, | |
335 | }; | |
336 | ||
b13ba1b8 JW |
337 | static struct rtnl_link_ops macvlan_link_ops; |
338 | ||
b863ceb7 PM |
339 | static int macvlan_open(struct net_device *dev) |
340 | { | |
341 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
342 | struct net_device *lowerdev = vlan->lowerdev; |
343 | int err; | |
344 | ||
eb06acdc | 345 | if (vlan->port->passthru) { |
78738141 MT |
346 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
347 | err = dev_set_promiscuity(lowerdev, 1); | |
348 | if (err < 0) | |
349 | goto out; | |
350 | } | |
eb06acdc SS |
351 | goto hash_add; |
352 | } | |
353 | ||
b13ba1b8 JW |
354 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD && |
355 | dev->rtnl_link_ops == &macvlan_link_ops) { | |
a6cc0cfa JF |
356 | vlan->fwd_priv = |
357 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); | |
358 | ||
359 | /* If we get a NULL pointer back, or if we get an error | |
360 | * then we should just fall through to the non accelerated path | |
361 | */ | |
362 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { | |
363 | vlan->fwd_priv = NULL; | |
f663dd9a | 364 | } else |
a6cc0cfa | 365 | return 0; |
a6cc0cfa JF |
366 | } |
367 | ||
f9ac30f0 EB |
368 | err = -EBUSY; |
369 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
370 | goto out; | |
371 | ||
a748ee24 | 372 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 373 | if (err < 0) |
b89fb7da WC |
374 | goto out; |
375 | if (dev->flags & IFF_ALLMULTI) { | |
376 | err = dev_set_allmulti(lowerdev, 1); | |
377 | if (err < 0) | |
378 | goto del_unicast; | |
379 | } | |
eb06acdc SS |
380 | |
381 | hash_add: | |
f9ac30f0 | 382 | macvlan_hash_add(vlan); |
b863ceb7 | 383 | return 0; |
b89fb7da WC |
384 | |
385 | del_unicast: | |
a748ee24 | 386 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da | 387 | out: |
a6cc0cfa JF |
388 | if (vlan->fwd_priv) { |
389 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
390 | vlan->fwd_priv); | |
391 | vlan->fwd_priv = NULL; | |
392 | } | |
b89fb7da | 393 | return err; |
b863ceb7 PM |
394 | } |
395 | ||
396 | static int macvlan_stop(struct net_device *dev) | |
397 | { | |
398 | struct macvlan_dev *vlan = netdev_priv(dev); | |
399 | struct net_device *lowerdev = vlan->lowerdev; | |
400 | ||
a6cc0cfa JF |
401 | if (vlan->fwd_priv) { |
402 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
403 | vlan->fwd_priv); | |
404 | vlan->fwd_priv = NULL; | |
405 | return 0; | |
406 | } | |
407 | ||
df8ef8f3 JF |
408 | dev_uc_unsync(lowerdev, dev); |
409 | dev_mc_unsync(lowerdev, dev); | |
410 | ||
eb06acdc | 411 | if (vlan->port->passthru) { |
df8ef8f3 JF |
412 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
413 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
414 | goto hash_del; |
415 | } | |
416 | ||
b863ceb7 PM |
417 | if (dev->flags & IFF_ALLMULTI) |
418 | dev_set_allmulti(lowerdev, -1); | |
419 | ||
a748ee24 | 420 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 421 | |
eb06acdc | 422 | hash_del: |
449f4544 | 423 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
424 | return 0; |
425 | } | |
426 | ||
ad5d20a6 PM |
427 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
428 | { | |
429 | struct macvlan_dev *vlan = netdev_priv(dev); | |
430 | struct net_device *lowerdev = vlan->lowerdev; | |
431 | struct sockaddr *addr = p; | |
432 | int err; | |
433 | ||
434 | if (!is_valid_ether_addr(addr->sa_data)) | |
435 | return -EADDRNOTAVAIL; | |
436 | ||
f9ac30f0 EB |
437 | if (!(dev->flags & IFF_UP)) { |
438 | /* Just copy in the new address */ | |
439 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
440 | } else { | |
441 | /* Rehash and update the device filters */ | |
442 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
443 | return -EBUSY; | |
ad5d20a6 | 444 | |
a748ee24 | 445 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 446 | if (err) |
f9ac30f0 | 447 | return err; |
ad5d20a6 | 448 | |
a748ee24 | 449 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
450 | |
451 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
452 | } | |
ad5d20a6 PM |
453 | return 0; |
454 | } | |
455 | ||
b863ceb7 PM |
456 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
457 | { | |
458 | struct macvlan_dev *vlan = netdev_priv(dev); | |
459 | struct net_device *lowerdev = vlan->lowerdev; | |
460 | ||
bbeb0ead PC |
461 | if (dev->flags & IFF_UP) { |
462 | if (change & IFF_ALLMULTI) | |
463 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
464 | } | |
b863ceb7 PM |
465 | } |
466 | ||
df8ef8f3 | 467 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
468 | { |
469 | struct macvlan_dev *vlan = netdev_priv(dev); | |
470 | ||
cd431e73 ED |
471 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
472 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
473 | } else { | |
474 | struct netdev_hw_addr *ha; | |
475 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
476 | ||
477 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
478 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 479 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 480 | } |
d5270430 | 481 | |
3807ff58 | 482 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 483 | |
cd431e73 ED |
484 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
485 | } | |
df8ef8f3 | 486 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
487 | dev_mc_sync(vlan->lowerdev, dev); |
488 | } | |
489 | ||
490 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
491 | { | |
492 | struct macvlan_dev *vlan = netdev_priv(dev); | |
493 | ||
494 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
495 | return -EINVAL; | |
496 | dev->mtu = new_mtu; | |
497 | return 0; | |
498 | } | |
499 | ||
500 | /* | |
501 | * macvlan network devices have devices nesting below it and are a special | |
502 | * "super class" of normal network devices; split their locks off into a | |
503 | * separate class since they always nest. | |
504 | */ | |
505 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 506 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 507 | |
8b4703e9 VY |
508 | #define ALWAYS_ON_FEATURES \ |
509 | (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX) | |
510 | ||
b863ceb7 PM |
511 | #define MACVLAN_FEATURES \ |
512 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
513 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 | 514 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 515 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
516 | |
517 | #define MACVLAN_STATE_MASK \ | |
518 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
519 | ||
c674ac30 VY |
520 | static int macvlan_get_nest_level(struct net_device *dev) |
521 | { | |
522 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
523 | } | |
524 | ||
e8a0464c DM |
525 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
526 | struct netdev_queue *txq, | |
527 | void *_unused) | |
c773e847 DM |
528 | { |
529 | lockdep_set_class(&txq->_xmit_lock, | |
530 | &macvlan_netdev_xmit_lock_key); | |
531 | } | |
532 | ||
533 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
534 | { | |
c674ac30 VY |
535 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
536 | &macvlan_netdev_addr_lock_key, | |
537 | macvlan_get_nest_level(dev)); | |
e8a0464c | 538 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
539 | } |
540 | ||
b863ceb7 PM |
541 | static int macvlan_init(struct net_device *dev) |
542 | { | |
543 | struct macvlan_dev *vlan = netdev_priv(dev); | |
544 | const struct net_device *lowerdev = vlan->lowerdev; | |
545 | ||
546 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
547 | (lowerdev->state & MACVLAN_STATE_MASK); | |
548 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 549 | dev->features |= ALWAYS_ON_FEATURES; |
8c2acc53 | 550 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 551 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 552 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 553 | |
c773e847 DM |
554 | macvlan_set_lockdep_class(dev); |
555 | ||
1c213bd2 | 556 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 557 | if (!vlan->pcpu_stats) |
fccaf710 ED |
558 | return -ENOMEM; |
559 | ||
b863ceb7 PM |
560 | return 0; |
561 | } | |
562 | ||
fccaf710 ED |
563 | static void macvlan_uninit(struct net_device *dev) |
564 | { | |
565 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 566 | struct macvlan_port *port = vlan->port; |
fccaf710 | 567 | |
8ffab51b | 568 | free_percpu(vlan->pcpu_stats); |
d5cd9244 EB |
569 | |
570 | port->count -= 1; | |
571 | if (!port->count) | |
572 | macvlan_port_destroy(port->dev); | |
fccaf710 ED |
573 | } |
574 | ||
28172739 ED |
575 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
576 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 577 | { |
fccaf710 ED |
578 | struct macvlan_dev *vlan = netdev_priv(dev); |
579 | ||
8ffab51b | 580 | if (vlan->pcpu_stats) { |
cdf3e274 | 581 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
582 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
583 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 584 | unsigned int start; |
fccaf710 ED |
585 | int i; |
586 | ||
587 | for_each_possible_cpu(i) { | |
8ffab51b | 588 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 589 | do { |
57a7744e | 590 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
591 | rx_packets = p->rx_packets; |
592 | rx_bytes = p->rx_bytes; | |
593 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
594 | tx_packets = p->tx_packets; |
595 | tx_bytes = p->tx_bytes; | |
57a7744e | 596 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
597 | |
598 | stats->rx_packets += rx_packets; | |
599 | stats->rx_bytes += rx_bytes; | |
600 | stats->multicast += rx_multicast; | |
601 | stats->tx_packets += tx_packets; | |
602 | stats->tx_bytes += tx_bytes; | |
603 | /* rx_errors & tx_dropped are u32, updated | |
604 | * without syncp protection. | |
605 | */ | |
606 | rx_errors += p->rx_errors; | |
607 | tx_dropped += p->tx_dropped; | |
fccaf710 | 608 | } |
8ffab51b ED |
609 | stats->rx_errors = rx_errors; |
610 | stats->rx_dropped = rx_errors; | |
611 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
612 | } |
613 | return stats; | |
614 | } | |
615 | ||
8e586137 | 616 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 617 | __be16 proto, u16 vid) |
8d13e670 JF |
618 | { |
619 | struct macvlan_dev *vlan = netdev_priv(dev); | |
620 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 621 | |
80d5c368 | 622 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
623 | } |
624 | ||
8e586137 | 625 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 626 | __be16 proto, u16 vid) |
8d13e670 JF |
627 | { |
628 | struct macvlan_dev *vlan = netdev_priv(dev); | |
629 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 630 | |
80d5c368 | 631 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 632 | return 0; |
8d13e670 JF |
633 | } |
634 | ||
edc7d573 | 635 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 636 | struct net_device *dev, |
6b6e2725 | 637 | const unsigned char *addr, |
df8ef8f3 JF |
638 | u16 flags) |
639 | { | |
640 | struct macvlan_dev *vlan = netdev_priv(dev); | |
641 | int err = -EINVAL; | |
642 | ||
643 | if (!vlan->port->passthru) | |
644 | return -EOPNOTSUPP; | |
645 | ||
ab2cfbb2 TR |
646 | if (flags & NLM_F_REPLACE) |
647 | return -EOPNOTSUPP; | |
648 | ||
df8ef8f3 JF |
649 | if (is_unicast_ether_addr(addr)) |
650 | err = dev_uc_add_excl(dev, addr); | |
651 | else if (is_multicast_ether_addr(addr)) | |
652 | err = dev_mc_add_excl(dev, addr); | |
653 | ||
654 | return err; | |
655 | } | |
656 | ||
1690be63 | 657 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 658 | struct net_device *dev, |
6b6e2725 | 659 | const unsigned char *addr) |
df8ef8f3 JF |
660 | { |
661 | struct macvlan_dev *vlan = netdev_priv(dev); | |
662 | int err = -EINVAL; | |
663 | ||
664 | if (!vlan->port->passthru) | |
665 | return -EOPNOTSUPP; | |
666 | ||
667 | if (is_unicast_ether_addr(addr)) | |
668 | err = dev_uc_del(dev, addr); | |
669 | else if (is_multicast_ether_addr(addr)) | |
670 | err = dev_mc_del(dev, addr); | |
671 | ||
672 | return err; | |
673 | } | |
674 | ||
b863ceb7 PM |
675 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
676 | struct ethtool_drvinfo *drvinfo) | |
677 | { | |
7826d43f JP |
678 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
679 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
680 | } |
681 | ||
9edb8bb6 SH |
682 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
683 | struct ethtool_cmd *cmd) | |
684 | { | |
685 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
686 | |
687 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
688 | } |
689 | ||
2be5c767 VY |
690 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
691 | netdev_features_t features) | |
692 | { | |
693 | struct macvlan_dev *vlan = netdev_priv(dev); | |
797f87f8 | 694 | netdev_features_t mask; |
2be5c767 | 695 | |
797f87f8 FW |
696 | features |= NETIF_F_ALL_FOR_ALL; |
697 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
698 | mask = features; | |
699 | ||
700 | features = netdev_increment_features(vlan->lowerdev->features, | |
701 | features, | |
702 | mask); | |
8b4703e9 | 703 | features |= ALWAYS_ON_FEATURES; |
797f87f8 FW |
704 | |
705 | return features; | |
2be5c767 VY |
706 | } |
707 | ||
b863ceb7 PM |
708 | static const struct ethtool_ops macvlan_ethtool_ops = { |
709 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 710 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
711 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
712 | }; | |
713 | ||
54a30c97 SH |
714 | static const struct net_device_ops macvlan_netdev_ops = { |
715 | .ndo_init = macvlan_init, | |
fccaf710 | 716 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
717 | .ndo_open = macvlan_open, |
718 | .ndo_stop = macvlan_stop, | |
00829823 | 719 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 720 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 721 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
722 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
723 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 724 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 725 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 726 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
727 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
728 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
729 | .ndo_fdb_add = macvlan_fdb_add, |
730 | .ndo_fdb_del = macvlan_fdb_del, | |
731 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 732 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
54a30c97 SH |
733 | }; |
734 | ||
8a35747a | 735 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
736 | { |
737 | ether_setup(dev); | |
738 | ||
550fd08c | 739 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
87ab7f6f | 740 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 741 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 742 | dev->destructor = free_netdev; |
71740129 | 743 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 744 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
745 | } |
746 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
747 | ||
748 | static void macvlan_setup(struct net_device *dev) | |
749 | { | |
750 | macvlan_common_setup(dev); | |
b863ceb7 PM |
751 | dev->tx_queue_len = 0; |
752 | } | |
753 | ||
754 | static int macvlan_port_create(struct net_device *dev) | |
755 | { | |
756 | struct macvlan_port *port; | |
757 | unsigned int i; | |
ab95bfe0 | 758 | int err; |
b863ceb7 PM |
759 | |
760 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
761 | return -EINVAL; | |
762 | ||
763 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
764 | if (port == NULL) | |
765 | return -ENOMEM; | |
766 | ||
eb06acdc | 767 | port->passthru = false; |
b863ceb7 PM |
768 | port->dev = dev; |
769 | INIT_LIST_HEAD(&port->vlans); | |
770 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
771 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 772 | |
a35e2c1b JP |
773 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
774 | if (err) | |
ab95bfe0 | 775 | kfree(port); |
d9351561 ED |
776 | else |
777 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 778 | return err; |
b863ceb7 PM |
779 | } |
780 | ||
781 | static void macvlan_port_destroy(struct net_device *dev) | |
782 | { | |
e052f7e6 | 783 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
b863ceb7 | 784 | |
a35e2c1b | 785 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 786 | netdev_rx_handler_unregister(dev); |
6e070aec | 787 | kfree_rcu(port, rcu); |
b863ceb7 PM |
788 | } |
789 | ||
b863ceb7 PM |
790 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
791 | { | |
792 | if (tb[IFLA_ADDRESS]) { | |
793 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
794 | return -EINVAL; | |
795 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
796 | return -EADDRNOTAVAIL; | |
797 | } | |
27c0b1a8 | 798 | |
15127478 MT |
799 | if (data && data[IFLA_MACVLAN_FLAGS] && |
800 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) | |
801 | return -EINVAL; | |
802 | ||
27c0b1a8 AB |
803 | if (data && data[IFLA_MACVLAN_MODE]) { |
804 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
805 | case MACVLAN_MODE_PRIVATE: | |
806 | case MACVLAN_MODE_VEPA: | |
807 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 808 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
809 | break; |
810 | default: | |
811 | return -EINVAL; | |
812 | } | |
813 | } | |
b863ceb7 PM |
814 | return 0; |
815 | } | |
816 | ||
fc0663d6 | 817 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
2f6a1b66 | 818 | struct nlattr *tb[], struct nlattr *data[]) |
b863ceb7 PM |
819 | { |
820 | struct macvlan_dev *vlan = netdev_priv(dev); | |
821 | struct macvlan_port *port; | |
822 | struct net_device *lowerdev; | |
823 | int err; | |
824 | ||
825 | if (!tb[IFLA_LINK]) | |
826 | return -EINVAL; | |
827 | ||
81adee47 | 828 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
829 | if (lowerdev == NULL) |
830 | return -ENODEV; | |
831 | ||
d70f2cf5 | 832 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 833 | * the real device as the lowerdev. |
a6ca5f1d | 834 | */ |
d70f2cf5 KW |
835 | if (netif_is_macvlan(lowerdev)) |
836 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 837 | |
b863ceb7 PM |
838 | if (!tb[IFLA_MTU]) |
839 | dev->mtu = lowerdev->mtu; | |
840 | else if (dev->mtu > lowerdev->mtu) | |
841 | return -EINVAL; | |
842 | ||
843 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 844 | eth_hw_addr_random(dev); |
b863ceb7 | 845 | |
a35e2c1b | 846 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
847 | err = macvlan_port_create(lowerdev); |
848 | if (err < 0) | |
849 | return err; | |
850 | } | |
e052f7e6 | 851 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 852 | |
eb06acdc SS |
853 | /* Only 1 macvlan device can be created in passthru mode */ |
854 | if (port->passthru) | |
855 | return -EINVAL; | |
856 | ||
b863ceb7 PM |
857 | vlan->lowerdev = lowerdev; |
858 | vlan->dev = dev; | |
859 | vlan->port = port; | |
2be5c767 | 860 | vlan->set_features = MACVLAN_FEATURES; |
c674ac30 | 861 | vlan->nest_level = dev_get_nest_level(lowerdev, netif_is_macvlan) + 1; |
b863ceb7 | 862 | |
27c0b1a8 AB |
863 | vlan->mode = MACVLAN_MODE_VEPA; |
864 | if (data && data[IFLA_MACVLAN_MODE]) | |
865 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
866 | ||
df8ef8f3 JF |
867 | if (data && data[IFLA_MACVLAN_FLAGS]) |
868 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
869 | ||
eb06acdc | 870 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
d5cd9244 | 871 | if (port->count) |
eb06acdc SS |
872 | return -EINVAL; |
873 | port->passthru = true; | |
8b98604e | 874 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
875 | } |
876 | ||
47d4ab91 JF |
877 | port->count += 1; |
878 | err = register_netdevice(dev); | |
879 | if (err < 0) | |
880 | goto destroy_port; | |
881 | ||
a6cc0cfa | 882 | dev->priv_flags |= IFF_MACVLAN; |
7cd43db7 JP |
883 | err = netdev_upper_dev_link(lowerdev, dev); |
884 | if (err) | |
da37705c | 885 | goto unregister_netdev; |
b863ceb7 | 886 | |
233c7df0 | 887 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 888 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 889 | |
b863ceb7 | 890 | return 0; |
f16d3d57 | 891 | |
da37705c CW |
892 | unregister_netdev: |
893 | unregister_netdevice(dev); | |
f16d3d57 | 894 | destroy_port: |
d5cd9244 EB |
895 | port->count -= 1; |
896 | if (!port->count) | |
f16d3d57 JP |
897 | macvlan_port_destroy(lowerdev); |
898 | ||
899 | return err; | |
b863ceb7 | 900 | } |
fc0663d6 | 901 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 902 | |
fc0663d6 AB |
903 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
904 | struct nlattr *tb[], struct nlattr *data[]) | |
905 | { | |
2f6a1b66 | 906 | return macvlan_common_newlink(src_net, dev, tb, data); |
fc0663d6 AB |
907 | } |
908 | ||
909 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
910 | { |
911 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 912 | |
233c7df0 | 913 | list_del_rcu(&vlan->list); |
23289a37 | 914 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 915 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 916 | } |
fc0663d6 | 917 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 918 | |
27c0b1a8 AB |
919 | static int macvlan_changelink(struct net_device *dev, |
920 | struct nlattr *tb[], struct nlattr *data[]) | |
921 | { | |
922 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
923 | enum macvlan_mode mode; |
924 | bool set_mode = false; | |
925 | ||
926 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
927 | if (data && data[IFLA_MACVLAN_MODE]) { | |
928 | set_mode = true; | |
929 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
930 | /* Passthrough mode can't be set or cleared dynamically */ | |
931 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
932 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
933 | return -EINVAL; | |
934 | } | |
99ffc3e7 | 935 | |
df8ef8f3 JF |
936 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
937 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
938 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
99ffc3e7 MT |
939 | if (vlan->port->passthru && promisc) { |
940 | int err; | |
941 | ||
942 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
943 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
944 | else | |
945 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
946 | if (err < 0) | |
947 | return err; | |
948 | } | |
df8ef8f3 JF |
949 | vlan->flags = flags; |
950 | } | |
266e8347 MT |
951 | if (set_mode) |
952 | vlan->mode = mode; | |
27c0b1a8 AB |
953 | return 0; |
954 | } | |
955 | ||
956 | static size_t macvlan_get_size(const struct net_device *dev) | |
957 | { | |
01fe944f ED |
958 | return (0 |
959 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
960 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
961 | ); | |
27c0b1a8 AB |
962 | } |
963 | ||
964 | static int macvlan_fill_info(struct sk_buff *skb, | |
965 | const struct net_device *dev) | |
966 | { | |
967 | struct macvlan_dev *vlan = netdev_priv(dev); | |
968 | ||
ead9a76c DM |
969 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
970 | goto nla_put_failure; | |
df8ef8f3 JF |
971 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
972 | goto nla_put_failure; | |
27c0b1a8 AB |
973 | return 0; |
974 | ||
975 | nla_put_failure: | |
976 | return -EMSGSIZE; | |
977 | } | |
978 | ||
979 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
980 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
981 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
27c0b1a8 AB |
982 | }; |
983 | ||
fc0663d6 AB |
984 | int macvlan_link_register(struct rtnl_link_ops *ops) |
985 | { | |
986 | /* common fields */ | |
987 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
988 | ops->validate = macvlan_validate; |
989 | ops->maxtype = IFLA_MACVLAN_MAX; | |
990 | ops->policy = macvlan_policy; | |
991 | ops->changelink = macvlan_changelink; | |
992 | ops->get_size = macvlan_get_size; | |
993 | ops->fill_info = macvlan_fill_info; | |
994 | ||
995 | return rtnl_link_register(ops); | |
996 | }; | |
997 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
998 | ||
999 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 1000 | .kind = "macvlan", |
8a35747a | 1001 | .setup = macvlan_setup, |
b863ceb7 PM |
1002 | .newlink = macvlan_newlink, |
1003 | .dellink = macvlan_dellink, | |
1004 | }; | |
1005 | ||
1006 | static int macvlan_device_event(struct notifier_block *unused, | |
1007 | unsigned long event, void *ptr) | |
1008 | { | |
351638e7 | 1009 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1010 | struct macvlan_dev *vlan, *next; |
1011 | struct macvlan_port *port; | |
226bd341 | 1012 | LIST_HEAD(list_kill); |
b863ceb7 | 1013 | |
a35e2c1b | 1014 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
1015 | return NOTIFY_DONE; |
1016 | ||
e052f7e6 | 1017 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1018 | |
b863ceb7 PM |
1019 | switch (event) { |
1020 | case NETDEV_CHANGE: | |
1021 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1022 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1023 | vlan->dev); | |
b863ceb7 PM |
1024 | break; |
1025 | case NETDEV_FEAT_CHANGE: | |
1026 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1027 | vlan->dev->gso_max_size = dev->gso_max_size; |
797f87f8 | 1028 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1029 | } |
1030 | break; | |
1031 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
1032 | /* twiddle thumbs on netns device moves */ |
1033 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1034 | break; | |
1035 | ||
b863ceb7 | 1036 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1037 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1038 | unregister_netdevice_many(&list_kill); | |
1039 | list_del(&list_kill); | |
b863ceb7 | 1040 | break; |
1c01fe14 JP |
1041 | case NETDEV_PRE_TYPE_CHANGE: |
1042 | /* Forbid underlaying device to change its type. */ | |
1043 | return NOTIFY_BAD; | |
b863ceb7 PM |
1044 | } |
1045 | return NOTIFY_DONE; | |
1046 | } | |
1047 | ||
1048 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1049 | .notifier_call = macvlan_device_event, | |
1050 | }; | |
1051 | ||
1052 | static int __init macvlan_init_module(void) | |
1053 | { | |
1054 | int err; | |
1055 | ||
1056 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1057 | |
fc0663d6 | 1058 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1059 | if (err < 0) |
1060 | goto err1; | |
1061 | return 0; | |
1062 | err1: | |
b863ceb7 PM |
1063 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1064 | return err; | |
1065 | } | |
1066 | ||
1067 | static void __exit macvlan_cleanup_module(void) | |
1068 | { | |
1069 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1070 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1071 | } | |
1072 | ||
1073 | module_init(macvlan_init_module); | |
1074 | module_exit(macvlan_cleanup_module); | |
1075 | ||
1076 | MODULE_LICENSE("GPL"); | |
1077 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1078 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1079 | MODULE_ALIAS_RTNL_LINK("macvlan"); |