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> |
412ca155 | 33 | #include <linux/workqueue.h> |
b863ceb7 | 34 | #include <net/rtnetlink.h> |
618e1b74 | 35 | #include <net/xfrm.h> |
688cea83 | 36 | #include <linux/netpoll.h> |
b863ceb7 PM |
37 | |
38 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) | |
39 | ||
40 | struct macvlan_port { | |
41 | struct net_device *dev; | |
42 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
43 | struct list_head vlans; | |
8b37ef0a | 44 | struct rcu_head rcu; |
412ca155 HX |
45 | struct sk_buff_head bc_queue; |
46 | struct work_struct bc_work; | |
eb06acdc | 47 | bool passthru; |
5e3c516b | 48 | int count; |
b863ceb7 PM |
49 | }; |
50 | ||
412ca155 HX |
51 | struct macvlan_skb_cb { |
52 | const struct macvlan_dev *src; | |
53 | }; | |
54 | ||
55 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
56 | ||
d5cd9244 EB |
57 | static void macvlan_port_destroy(struct net_device *dev); |
58 | ||
e052f7e6 ED |
59 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
60 | { | |
61 | return rcu_dereference(dev->rx_handler_data); | |
62 | } | |
63 | ||
64 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
65 | { | |
66 | return rtnl_dereference(dev->rx_handler_data); | |
67 | } | |
68 | ||
a35e2c1b JP |
69 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
70 | ||
b863ceb7 PM |
71 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
72 | const unsigned char *addr) | |
73 | { | |
74 | struct macvlan_dev *vlan; | |
b863ceb7 | 75 | |
b67bfe0d | 76 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[addr[5]], hlist) { |
a6700db1 | 77 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
78 | return vlan; |
79 | } | |
80 | return NULL; | |
81 | } | |
82 | ||
f9ac30f0 EB |
83 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
84 | { | |
85 | struct macvlan_port *port = vlan->port; | |
86 | const unsigned char *addr = vlan->dev->dev_addr; | |
87 | ||
88 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
89 | } | |
90 | ||
449f4544 | 91 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
92 | { |
93 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
94 | if (sync) |
95 | synchronize_rcu(); | |
f9ac30f0 EB |
96 | } |
97 | ||
98 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
99 | const unsigned char *addr) | |
100 | { | |
449f4544 | 101 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
102 | /* Now that we are unhashed it is safe to change the device |
103 | * address without confusing packet delivery. | |
104 | */ | |
105 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
106 | macvlan_hash_add(vlan); | |
107 | } | |
108 | ||
109 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
110 | const unsigned char *addr) | |
111 | { | |
112 | /* Test to see if the specified multicast address is | |
113 | * currently in use by the underlying device or | |
114 | * another macvlan. | |
115 | */ | |
a6700db1 | 116 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
117 | return 1; |
118 | ||
119 | if (macvlan_hash_lookup(port, addr)) | |
120 | return 1; | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
a1e514c5 | 125 | |
fc0663d6 AB |
126 | static int macvlan_broadcast_one(struct sk_buff *skb, |
127 | const struct macvlan_dev *vlan, | |
618e1b74 | 128 | const struct ethhdr *eth, bool local) |
a1e514c5 | 129 | { |
fc0663d6 | 130 | struct net_device *dev = vlan->dev; |
a1e514c5 | 131 | |
618e1b74 | 132 | if (local) |
412ca155 | 133 | return __dev_forward_skb(dev, skb); |
618e1b74 | 134 | |
a1e514c5 | 135 | skb->dev = dev; |
a6700db1 | 136 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
137 | skb->pkt_type = PACKET_BROADCAST; |
138 | else | |
139 | skb->pkt_type = PACKET_MULTICAST; | |
140 | ||
412ca155 | 141 | return 0; |
a1e514c5 AB |
142 | } |
143 | ||
3807ff58 ED |
144 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
145 | { | |
146 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
147 | } | |
148 | ||
149 | ||
150 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
151 | const unsigned char *addr) | |
cd431e73 ED |
152 | { |
153 | u32 val = __get_unaligned_cpu32(addr + 2); | |
154 | ||
3807ff58 | 155 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
156 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
157 | } | |
158 | ||
b863ceb7 | 159 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
160 | const struct macvlan_port *port, |
161 | struct net_device *src, | |
162 | enum macvlan_mode mode) | |
b863ceb7 PM |
163 | { |
164 | const struct ethhdr *eth = eth_hdr(skb); | |
165 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
166 | struct sk_buff *nskb; |
167 | unsigned int i; | |
a1e514c5 | 168 | int err; |
3807ff58 | 169 | unsigned int hash; |
b863ceb7 | 170 | |
efbbced3 PM |
171 | if (skb->protocol == htons(ETH_P_PAUSE)) |
172 | return; | |
173 | ||
b863ceb7 | 174 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 175 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
176 | if (vlan->dev == src || !(vlan->mode & mode)) |
177 | continue; | |
178 | ||
3807ff58 | 179 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
180 | if (!test_bit(hash, vlan->mc_filter)) |
181 | continue; | |
de9e8f3f HX |
182 | |
183 | err = NET_RX_DROP; | |
b863ceb7 | 184 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
185 | if (likely(nskb)) |
186 | err = macvlan_broadcast_one( | |
187 | nskb, vlan, eth, | |
412ca155 HX |
188 | mode == MACVLAN_MODE_BRIDGE) ?: |
189 | netif_rx_ni(nskb); | |
a1e514c5 AB |
190 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
191 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
192 | } |
193 | } | |
194 | } | |
195 | ||
412ca155 | 196 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 197 | { |
412ca155 HX |
198 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
199 | bc_work); | |
200 | struct sk_buff *skb; | |
201 | struct sk_buff_head list; | |
202 | ||
203 | skb_queue_head_init(&list); | |
204 | ||
205 | spin_lock_bh(&port->bc_queue.lock); | |
206 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
207 | spin_unlock_bh(&port->bc_queue.lock); | |
208 | ||
209 | while ((skb = __skb_dequeue(&list))) { | |
210 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
211 | ||
212 | rcu_read_lock(); | |
b863ceb7 | 213 | |
618e1b74 AB |
214 | if (!src) |
215 | /* frame comes from an external address */ | |
216 | macvlan_broadcast(skb, port, NULL, | |
217 | MACVLAN_MODE_PRIVATE | | |
218 | MACVLAN_MODE_VEPA | | |
eb06acdc | 219 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
220 | MACVLAN_MODE_BRIDGE); |
221 | else if (src->mode == MACVLAN_MODE_VEPA) | |
222 | /* flood to everyone except source */ | |
223 | macvlan_broadcast(skb, port, src->dev, | |
224 | MACVLAN_MODE_VEPA | | |
225 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 226 | else |
618e1b74 AB |
227 | /* |
228 | * flood only to VEPA ports, bridge ports | |
229 | * already saw the frame on the way out. | |
230 | */ | |
231 | macvlan_broadcast(skb, port, src->dev, | |
232 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
233 | |
234 | rcu_read_unlock(); | |
235 | ||
236 | kfree_skb(skb); | |
237 | } | |
238 | } | |
239 | ||
240 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
241 | struct sk_buff *skb) | |
242 | { | |
e676f197 | 243 | struct sk_buff *nskb; |
412ca155 HX |
244 | int err = -ENOMEM; |
245 | ||
e676f197 HX |
246 | nskb = skb_clone(skb, GFP_ATOMIC); |
247 | if (!nskb) | |
412ca155 HX |
248 | goto err; |
249 | ||
250 | spin_lock(&port->bc_queue.lock); | |
251 | if (skb_queue_len(&port->bc_queue) < skb->dev->tx_queue_len) { | |
e676f197 | 252 | __skb_queue_tail(&port->bc_queue, nskb); |
412ca155 HX |
253 | err = 0; |
254 | } | |
255 | spin_unlock(&port->bc_queue.lock); | |
256 | ||
257 | if (err) | |
e676f197 | 258 | goto free_nskb; |
412ca155 HX |
259 | |
260 | schedule_work(&port->bc_work); | |
261 | return; | |
262 | ||
e676f197 HX |
263 | free_nskb: |
264 | kfree_skb(nskb); | |
412ca155 HX |
265 | err: |
266 | atomic_long_inc(&skb->dev->rx_dropped); | |
267 | } | |
268 | ||
269 | /* called under rcu_read_lock() from netif_receive_skb */ | |
270 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
271 | { | |
272 | struct macvlan_port *port; | |
273 | struct sk_buff *skb = *pskb; | |
274 | const struct ethhdr *eth = eth_hdr(skb); | |
275 | const struct macvlan_dev *vlan; | |
276 | const struct macvlan_dev *src; | |
277 | struct net_device *dev; | |
278 | unsigned int len = 0; | |
279 | int ret = NET_RX_DROP; | |
280 | ||
281 | port = macvlan_port_get_rcu(skb->dev); | |
282 | if (is_multicast_ether_addr(eth->h_dest)) { | |
283 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); | |
284 | if (!skb) | |
285 | return RX_HANDLER_CONSUMED; | |
286 | eth = eth_hdr(skb); | |
287 | src = macvlan_hash_lookup(port, eth->h_source); | |
288 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
289 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 290 | /* forward to original port. */ |
291 | vlan = src; | |
412ca155 HX |
292 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
293 | netif_rx(skb); | |
729e72a1 | 294 | goto out; |
295 | } | |
296 | ||
412ca155 HX |
297 | MACVLAN_SKB_CB(skb)->src = src; |
298 | macvlan_broadcast_enqueue(port, skb); | |
299 | ||
8a4eb573 | 300 | return RX_HANDLER_PASS; |
b863ceb7 PM |
301 | } |
302 | ||
eb06acdc | 303 | if (port->passthru) |
233c7df0 JP |
304 | vlan = list_first_or_null_rcu(&port->vlans, |
305 | struct macvlan_dev, list); | |
eb06acdc SS |
306 | else |
307 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 308 | if (vlan == NULL) |
8a4eb573 | 309 | return RX_HANDLER_PASS; |
b863ceb7 PM |
310 | |
311 | dev = vlan->dev; | |
312 | if (unlikely(!(dev->flags & IFF_UP))) { | |
313 | kfree_skb(skb); | |
8a4eb573 | 314 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 315 | } |
a1e514c5 | 316 | len = skb->len + ETH_HLEN; |
b863ceb7 | 317 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 318 | if (!skb) |
ba01877f | 319 | goto out; |
b863ceb7 PM |
320 | |
321 | skb->dev = dev; | |
322 | skb->pkt_type = PACKET_HOST; | |
323 | ||
2f6a1b66 | 324 | ret = netif_rx(skb); |
ba01877f SS |
325 | |
326 | out: | |
327 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 328 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
329 | } |
330 | ||
618e1b74 AB |
331 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
332 | { | |
333 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
334 | const struct macvlan_port *port = vlan->port; | |
335 | const struct macvlan_dev *dest; | |
336 | ||
337 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
338 | const struct ethhdr *eth = (void *)skb->data; | |
339 | ||
340 | /* send to other bridge ports directly */ | |
341 | if (is_multicast_ether_addr(eth->h_dest)) { | |
342 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
343 | goto xmit_world; | |
344 | } | |
345 | ||
346 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
347 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 348 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 349 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
350 | |
351 | return NET_XMIT_SUCCESS; | |
352 | } | |
353 | } | |
354 | ||
355 | xmit_world: | |
59b9997b | 356 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
357 | return dev_queue_xmit(skb); |
358 | } | |
359 | ||
688cea83 | 360 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
361 | { | |
362 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
363 | if (vlan->netpoll) | |
364 | netpoll_send_skb(vlan->netpoll, skb); | |
365 | #else | |
366 | BUG(); | |
367 | #endif | |
368 | return NETDEV_TX_OK; | |
369 | } | |
370 | ||
0db901bd | 371 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
372 | struct net_device *dev) | |
b863ceb7 | 373 | { |
b863ceb7 PM |
374 | unsigned int len = skb->len; |
375 | int ret; | |
688cea83 | 376 | struct macvlan_dev *vlan = netdev_priv(dev); |
377 | ||
378 | if (unlikely(netpoll_tx_running(dev))) | |
379 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 380 | |
a6cc0cfa JF |
381 | if (vlan->fwd_priv) { |
382 | skb->dev = vlan->lowerdev; | |
f663dd9a | 383 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
a6cc0cfa JF |
384 | } else { |
385 | ret = macvlan_queue_xmit(skb, dev); | |
386 | } | |
387 | ||
2d6c9ffc | 388 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 389 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 390 | |
8ffab51b ED |
391 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
392 | u64_stats_update_begin(&pcpu_stats->syncp); | |
393 | pcpu_stats->tx_packets++; | |
394 | pcpu_stats->tx_bytes += len; | |
395 | u64_stats_update_end(&pcpu_stats->syncp); | |
396 | } else { | |
397 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
398 | } | |
cbbef5e1 | 399 | return ret; |
b863ceb7 PM |
400 | } |
401 | ||
402 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
403 | unsigned short type, const void *daddr, |
404 | const void *saddr, unsigned len) | |
b863ceb7 PM |
405 | { |
406 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
407 | struct net_device *lowerdev = vlan->lowerdev; | |
408 | ||
0c4e8581 SH |
409 | return dev_hard_header(skb, lowerdev, type, daddr, |
410 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
411 | } |
412 | ||
3b04ddde SH |
413 | static const struct header_ops macvlan_hard_header_ops = { |
414 | .create = macvlan_hard_header, | |
415 | .rebuild = eth_rebuild_header, | |
416 | .parse = eth_header_parse, | |
3b04ddde SH |
417 | .cache = eth_header_cache, |
418 | .cache_update = eth_header_cache_update, | |
419 | }; | |
420 | ||
b13ba1b8 JW |
421 | static struct rtnl_link_ops macvlan_link_ops; |
422 | ||
b863ceb7 PM |
423 | static int macvlan_open(struct net_device *dev) |
424 | { | |
425 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
426 | struct net_device *lowerdev = vlan->lowerdev; |
427 | int err; | |
428 | ||
eb06acdc | 429 | if (vlan->port->passthru) { |
78738141 MT |
430 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
431 | err = dev_set_promiscuity(lowerdev, 1); | |
432 | if (err < 0) | |
433 | goto out; | |
434 | } | |
eb06acdc SS |
435 | goto hash_add; |
436 | } | |
437 | ||
b13ba1b8 JW |
438 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD && |
439 | dev->rtnl_link_ops == &macvlan_link_ops) { | |
a6cc0cfa JF |
440 | vlan->fwd_priv = |
441 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); | |
442 | ||
443 | /* If we get a NULL pointer back, or if we get an error | |
444 | * then we should just fall through to the non accelerated path | |
445 | */ | |
446 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { | |
447 | vlan->fwd_priv = NULL; | |
f663dd9a | 448 | } else |
a6cc0cfa | 449 | return 0; |
a6cc0cfa JF |
450 | } |
451 | ||
f9ac30f0 EB |
452 | err = -EBUSY; |
453 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
454 | goto out; | |
455 | ||
a748ee24 | 456 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 457 | if (err < 0) |
b89fb7da WC |
458 | goto out; |
459 | if (dev->flags & IFF_ALLMULTI) { | |
460 | err = dev_set_allmulti(lowerdev, 1); | |
461 | if (err < 0) | |
462 | goto del_unicast; | |
463 | } | |
eb06acdc SS |
464 | |
465 | hash_add: | |
f9ac30f0 | 466 | macvlan_hash_add(vlan); |
b863ceb7 | 467 | return 0; |
b89fb7da WC |
468 | |
469 | del_unicast: | |
a748ee24 | 470 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da | 471 | out: |
a6cc0cfa JF |
472 | if (vlan->fwd_priv) { |
473 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
474 | vlan->fwd_priv); | |
475 | vlan->fwd_priv = NULL; | |
476 | } | |
b89fb7da | 477 | return err; |
b863ceb7 PM |
478 | } |
479 | ||
480 | static int macvlan_stop(struct net_device *dev) | |
481 | { | |
482 | struct macvlan_dev *vlan = netdev_priv(dev); | |
483 | struct net_device *lowerdev = vlan->lowerdev; | |
484 | ||
a6cc0cfa JF |
485 | if (vlan->fwd_priv) { |
486 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
487 | vlan->fwd_priv); | |
488 | vlan->fwd_priv = NULL; | |
489 | return 0; | |
490 | } | |
491 | ||
df8ef8f3 JF |
492 | dev_uc_unsync(lowerdev, dev); |
493 | dev_mc_unsync(lowerdev, dev); | |
494 | ||
eb06acdc | 495 | if (vlan->port->passthru) { |
df8ef8f3 JF |
496 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
497 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
498 | goto hash_del; |
499 | } | |
500 | ||
b863ceb7 PM |
501 | if (dev->flags & IFF_ALLMULTI) |
502 | dev_set_allmulti(lowerdev, -1); | |
503 | ||
a748ee24 | 504 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 505 | |
eb06acdc | 506 | hash_del: |
449f4544 | 507 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
508 | return 0; |
509 | } | |
510 | ||
e289fd28 | 511 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
512 | { |
513 | struct macvlan_dev *vlan = netdev_priv(dev); | |
514 | struct net_device *lowerdev = vlan->lowerdev; | |
ad5d20a6 PM |
515 | int err; |
516 | ||
f9ac30f0 EB |
517 | if (!(dev->flags & IFF_UP)) { |
518 | /* Just copy in the new address */ | |
e289fd28 | 519 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
520 | } else { |
521 | /* Rehash and update the device filters */ | |
e289fd28 | 522 | if (macvlan_addr_busy(vlan->port, addr)) |
f9ac30f0 | 523 | return -EBUSY; |
ad5d20a6 | 524 | |
e289fd28 | 525 | if (!vlan->port->passthru) { |
526 | err = dev_uc_add(lowerdev, addr); | |
527 | if (err) | |
528 | return err; | |
ad5d20a6 | 529 | |
e289fd28 | 530 | dev_uc_del(lowerdev, dev->dev_addr); |
531 | } | |
f9ac30f0 | 532 | |
e289fd28 | 533 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 534 | } |
ad5d20a6 PM |
535 | return 0; |
536 | } | |
537 | ||
e289fd28 | 538 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
539 | { | |
540 | struct macvlan_dev *vlan = netdev_priv(dev); | |
541 | struct sockaddr *addr = p; | |
542 | ||
543 | if (!is_valid_ether_addr(addr->sa_data)) | |
544 | return -EADDRNOTAVAIL; | |
545 | ||
546 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { | |
547 | dev_set_mac_address(vlan->lowerdev, addr); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | return macvlan_sync_address(dev, addr->sa_data); | |
552 | } | |
553 | ||
b863ceb7 PM |
554 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
555 | { | |
556 | struct macvlan_dev *vlan = netdev_priv(dev); | |
557 | struct net_device *lowerdev = vlan->lowerdev; | |
558 | ||
bbeb0ead PC |
559 | if (dev->flags & IFF_UP) { |
560 | if (change & IFF_ALLMULTI) | |
561 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
562 | } | |
b863ceb7 PM |
563 | } |
564 | ||
df8ef8f3 | 565 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
566 | { |
567 | struct macvlan_dev *vlan = netdev_priv(dev); | |
568 | ||
cd431e73 ED |
569 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
570 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
571 | } else { | |
572 | struct netdev_hw_addr *ha; | |
573 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
574 | ||
575 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
576 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 577 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 578 | } |
d5270430 | 579 | |
3807ff58 | 580 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 581 | |
cd431e73 ED |
582 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
583 | } | |
df8ef8f3 | 584 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
585 | dev_mc_sync(vlan->lowerdev, dev); |
586 | } | |
587 | ||
588 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
589 | { | |
590 | struct macvlan_dev *vlan = netdev_priv(dev); | |
591 | ||
592 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
593 | return -EINVAL; | |
594 | dev->mtu = new_mtu; | |
595 | return 0; | |
596 | } | |
597 | ||
598 | /* | |
599 | * macvlan network devices have devices nesting below it and are a special | |
600 | * "super class" of normal network devices; split their locks off into a | |
601 | * separate class since they always nest. | |
602 | */ | |
603 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 604 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 605 | |
8b4703e9 VY |
606 | #define ALWAYS_ON_FEATURES \ |
607 | (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX) | |
608 | ||
b863ceb7 PM |
609 | #define MACVLAN_FEATURES \ |
610 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
611 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 | 612 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 613 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
614 | |
615 | #define MACVLAN_STATE_MASK \ | |
616 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
617 | ||
c674ac30 VY |
618 | static int macvlan_get_nest_level(struct net_device *dev) |
619 | { | |
620 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
621 | } | |
622 | ||
e8a0464c DM |
623 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
624 | struct netdev_queue *txq, | |
625 | void *_unused) | |
c773e847 DM |
626 | { |
627 | lockdep_set_class(&txq->_xmit_lock, | |
628 | &macvlan_netdev_xmit_lock_key); | |
629 | } | |
630 | ||
631 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
632 | { | |
c674ac30 VY |
633 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
634 | &macvlan_netdev_addr_lock_key, | |
635 | macvlan_get_nest_level(dev)); | |
e8a0464c | 636 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
637 | } |
638 | ||
b863ceb7 PM |
639 | static int macvlan_init(struct net_device *dev) |
640 | { | |
641 | struct macvlan_dev *vlan = netdev_priv(dev); | |
642 | const struct net_device *lowerdev = vlan->lowerdev; | |
643 | ||
644 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
645 | (lowerdev->state & MACVLAN_STATE_MASK); | |
646 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 647 | dev->features |= ALWAYS_ON_FEATURES; |
081e83a7 | 648 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
8c2acc53 | 649 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 650 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 651 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 652 | |
c773e847 DM |
653 | macvlan_set_lockdep_class(dev); |
654 | ||
1c213bd2 | 655 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 656 | if (!vlan->pcpu_stats) |
fccaf710 ED |
657 | return -ENOMEM; |
658 | ||
b863ceb7 PM |
659 | return 0; |
660 | } | |
661 | ||
fccaf710 ED |
662 | static void macvlan_uninit(struct net_device *dev) |
663 | { | |
664 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 665 | struct macvlan_port *port = vlan->port; |
fccaf710 | 666 | |
8ffab51b | 667 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 668 | |
5e3c516b DM |
669 | port->count -= 1; |
670 | if (!port->count) | |
d5cd9244 | 671 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
672 | } |
673 | ||
28172739 ED |
674 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
675 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 676 | { |
fccaf710 ED |
677 | struct macvlan_dev *vlan = netdev_priv(dev); |
678 | ||
8ffab51b | 679 | if (vlan->pcpu_stats) { |
cdf3e274 | 680 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
681 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
682 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 683 | unsigned int start; |
fccaf710 ED |
684 | int i; |
685 | ||
686 | for_each_possible_cpu(i) { | |
8ffab51b | 687 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 688 | do { |
57a7744e | 689 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
690 | rx_packets = p->rx_packets; |
691 | rx_bytes = p->rx_bytes; | |
692 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
693 | tx_packets = p->tx_packets; |
694 | tx_bytes = p->tx_bytes; | |
57a7744e | 695 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
696 | |
697 | stats->rx_packets += rx_packets; | |
698 | stats->rx_bytes += rx_bytes; | |
699 | stats->multicast += rx_multicast; | |
700 | stats->tx_packets += tx_packets; | |
701 | stats->tx_bytes += tx_bytes; | |
702 | /* rx_errors & tx_dropped are u32, updated | |
703 | * without syncp protection. | |
704 | */ | |
705 | rx_errors += p->rx_errors; | |
706 | tx_dropped += p->tx_dropped; | |
fccaf710 | 707 | } |
8ffab51b ED |
708 | stats->rx_errors = rx_errors; |
709 | stats->rx_dropped = rx_errors; | |
710 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
711 | } |
712 | return stats; | |
713 | } | |
714 | ||
8e586137 | 715 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 716 | __be16 proto, u16 vid) |
8d13e670 JF |
717 | { |
718 | struct macvlan_dev *vlan = netdev_priv(dev); | |
719 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 720 | |
80d5c368 | 721 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
722 | } |
723 | ||
8e586137 | 724 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 725 | __be16 proto, u16 vid) |
8d13e670 JF |
726 | { |
727 | struct macvlan_dev *vlan = netdev_priv(dev); | |
728 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 729 | |
80d5c368 | 730 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 731 | return 0; |
8d13e670 JF |
732 | } |
733 | ||
edc7d573 | 734 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 735 | struct net_device *dev, |
6b6e2725 | 736 | const unsigned char *addr, |
df8ef8f3 JF |
737 | u16 flags) |
738 | { | |
739 | struct macvlan_dev *vlan = netdev_priv(dev); | |
740 | int err = -EINVAL; | |
741 | ||
8a50f11c VY |
742 | /* Support unicast filter only on passthru devices. |
743 | * Multicast filter should be allowed on all devices. | |
744 | */ | |
745 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
746 | return -EOPNOTSUPP; |
747 | ||
ab2cfbb2 TR |
748 | if (flags & NLM_F_REPLACE) |
749 | return -EOPNOTSUPP; | |
750 | ||
df8ef8f3 JF |
751 | if (is_unicast_ether_addr(addr)) |
752 | err = dev_uc_add_excl(dev, addr); | |
753 | else if (is_multicast_ether_addr(addr)) | |
754 | err = dev_mc_add_excl(dev, addr); | |
755 | ||
756 | return err; | |
757 | } | |
758 | ||
1690be63 | 759 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 760 | struct net_device *dev, |
6b6e2725 | 761 | const unsigned char *addr) |
df8ef8f3 JF |
762 | { |
763 | struct macvlan_dev *vlan = netdev_priv(dev); | |
764 | int err = -EINVAL; | |
765 | ||
8a50f11c VY |
766 | /* Support unicast filter only on passthru devices. |
767 | * Multicast filter should be allowed on all devices. | |
768 | */ | |
769 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
770 | return -EOPNOTSUPP; |
771 | ||
772 | if (is_unicast_ether_addr(addr)) | |
773 | err = dev_uc_del(dev, addr); | |
774 | else if (is_multicast_ether_addr(addr)) | |
775 | err = dev_mc_del(dev, addr); | |
776 | ||
777 | return err; | |
778 | } | |
779 | ||
b863ceb7 PM |
780 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
781 | struct ethtool_drvinfo *drvinfo) | |
782 | { | |
7826d43f JP |
783 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
784 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
785 | } |
786 | ||
9edb8bb6 SH |
787 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
788 | struct ethtool_cmd *cmd) | |
789 | { | |
790 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
791 | |
792 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
793 | } |
794 | ||
2be5c767 VY |
795 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
796 | netdev_features_t features) | |
797 | { | |
798 | struct macvlan_dev *vlan = netdev_priv(dev); | |
797f87f8 | 799 | netdev_features_t mask; |
2be5c767 | 800 | |
797f87f8 FW |
801 | features |= NETIF_F_ALL_FOR_ALL; |
802 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
803 | mask = features; | |
804 | ||
805 | features = netdev_increment_features(vlan->lowerdev->features, | |
806 | features, | |
807 | mask); | |
8b4703e9 | 808 | features |= ALWAYS_ON_FEATURES; |
0d0162e7 | 809 | features &= ~NETIF_F_NETNS_LOCAL; |
797f87f8 FW |
810 | |
811 | return features; | |
2be5c767 VY |
812 | } |
813 | ||
688cea83 | 814 | #ifdef CONFIG_NET_POLL_CONTROLLER |
815 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
816 | { | |
817 | return; | |
818 | } | |
819 | ||
820 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
821 | { | |
822 | struct macvlan_dev *vlan = netdev_priv(dev); | |
823 | struct net_device *real_dev = vlan->lowerdev; | |
824 | struct netpoll *netpoll; | |
825 | int err = 0; | |
826 | ||
827 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
828 | err = -ENOMEM; | |
829 | if (!netpoll) | |
830 | goto out; | |
831 | ||
832 | err = __netpoll_setup(netpoll, real_dev); | |
833 | if (err) { | |
834 | kfree(netpoll); | |
835 | goto out; | |
836 | } | |
837 | ||
838 | vlan->netpoll = netpoll; | |
839 | ||
840 | out: | |
841 | return err; | |
842 | } | |
843 | ||
844 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
845 | { | |
846 | struct macvlan_dev *vlan = netdev_priv(dev); | |
847 | struct netpoll *netpoll = vlan->netpoll; | |
848 | ||
849 | if (!netpoll) | |
850 | return; | |
851 | ||
852 | vlan->netpoll = NULL; | |
853 | ||
854 | __netpoll_free_async(netpoll); | |
855 | } | |
856 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
857 | ||
b863ceb7 PM |
858 | static const struct ethtool_ops macvlan_ethtool_ops = { |
859 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 860 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
861 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
862 | }; | |
863 | ||
54a30c97 SH |
864 | static const struct net_device_ops macvlan_netdev_ops = { |
865 | .ndo_init = macvlan_init, | |
fccaf710 | 866 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
867 | .ndo_open = macvlan_open, |
868 | .ndo_stop = macvlan_stop, | |
00829823 | 869 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 870 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 871 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
872 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
873 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 874 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 875 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 876 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
877 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
878 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
879 | .ndo_fdb_add = macvlan_fdb_add, |
880 | .ndo_fdb_del = macvlan_fdb_del, | |
881 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 882 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
688cea83 | 883 | #ifdef CONFIG_NET_POLL_CONTROLLER |
884 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
885 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
886 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
887 | #endif | |
54a30c97 SH |
888 | }; |
889 | ||
8a35747a | 890 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
891 | { |
892 | ether_setup(dev); | |
893 | ||
550fd08c | 894 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
87ab7f6f | 895 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 896 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 897 | dev->destructor = free_netdev; |
71740129 | 898 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 899 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
900 | } |
901 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
902 | ||
903 | static void macvlan_setup(struct net_device *dev) | |
904 | { | |
905 | macvlan_common_setup(dev); | |
b863ceb7 PM |
906 | dev->tx_queue_len = 0; |
907 | } | |
908 | ||
909 | static int macvlan_port_create(struct net_device *dev) | |
910 | { | |
911 | struct macvlan_port *port; | |
912 | unsigned int i; | |
ab95bfe0 | 913 | int err; |
b863ceb7 PM |
914 | |
915 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
916 | return -EINVAL; | |
917 | ||
918 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
919 | if (port == NULL) | |
920 | return -ENOMEM; | |
921 | ||
eb06acdc | 922 | port->passthru = false; |
b863ceb7 PM |
923 | port->dev = dev; |
924 | INIT_LIST_HEAD(&port->vlans); | |
925 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
926 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 927 | |
412ca155 HX |
928 | skb_queue_head_init(&port->bc_queue); |
929 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
930 | ||
a35e2c1b JP |
931 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
932 | if (err) | |
ab95bfe0 | 933 | kfree(port); |
d9351561 ED |
934 | else |
935 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 936 | return err; |
b863ceb7 PM |
937 | } |
938 | ||
939 | static void macvlan_port_destroy(struct net_device *dev) | |
940 | { | |
e052f7e6 | 941 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
b863ceb7 | 942 | |
412ca155 | 943 | cancel_work_sync(&port->bc_work); |
a35e2c1b | 944 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 945 | netdev_rx_handler_unregister(dev); |
6e070aec | 946 | kfree_rcu(port, rcu); |
b863ceb7 PM |
947 | } |
948 | ||
b863ceb7 PM |
949 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
950 | { | |
951 | if (tb[IFLA_ADDRESS]) { | |
952 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
953 | return -EINVAL; | |
954 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
955 | return -EADDRNOTAVAIL; | |
956 | } | |
27c0b1a8 | 957 | |
15127478 MT |
958 | if (data && data[IFLA_MACVLAN_FLAGS] && |
959 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) | |
960 | return -EINVAL; | |
961 | ||
27c0b1a8 AB |
962 | if (data && data[IFLA_MACVLAN_MODE]) { |
963 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
964 | case MACVLAN_MODE_PRIVATE: | |
965 | case MACVLAN_MODE_VEPA: | |
966 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 967 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
968 | break; |
969 | default: | |
970 | return -EINVAL; | |
971 | } | |
972 | } | |
b863ceb7 PM |
973 | return 0; |
974 | } | |
975 | ||
fc0663d6 | 976 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
2f6a1b66 | 977 | struct nlattr *tb[], struct nlattr *data[]) |
b863ceb7 PM |
978 | { |
979 | struct macvlan_dev *vlan = netdev_priv(dev); | |
980 | struct macvlan_port *port; | |
981 | struct net_device *lowerdev; | |
982 | int err; | |
983 | ||
984 | if (!tb[IFLA_LINK]) | |
985 | return -EINVAL; | |
986 | ||
81adee47 | 987 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
988 | if (lowerdev == NULL) |
989 | return -ENODEV; | |
990 | ||
d70f2cf5 | 991 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 992 | * the real device as the lowerdev. |
a6ca5f1d | 993 | */ |
d70f2cf5 KW |
994 | if (netif_is_macvlan(lowerdev)) |
995 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 996 | |
b863ceb7 PM |
997 | if (!tb[IFLA_MTU]) |
998 | dev->mtu = lowerdev->mtu; | |
999 | else if (dev->mtu > lowerdev->mtu) | |
1000 | return -EINVAL; | |
1001 | ||
1002 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 1003 | eth_hw_addr_random(dev); |
b863ceb7 | 1004 | |
a35e2c1b | 1005 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
1006 | err = macvlan_port_create(lowerdev); |
1007 | if (err < 0) | |
1008 | return err; | |
1009 | } | |
e052f7e6 | 1010 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1011 | |
eb06acdc SS |
1012 | /* Only 1 macvlan device can be created in passthru mode */ |
1013 | if (port->passthru) | |
1014 | return -EINVAL; | |
1015 | ||
b863ceb7 PM |
1016 | vlan->lowerdev = lowerdev; |
1017 | vlan->dev = dev; | |
1018 | vlan->port = port; | |
2be5c767 | 1019 | vlan->set_features = MACVLAN_FEATURES; |
c674ac30 | 1020 | vlan->nest_level = dev_get_nest_level(lowerdev, netif_is_macvlan) + 1; |
b863ceb7 | 1021 | |
27c0b1a8 AB |
1022 | vlan->mode = MACVLAN_MODE_VEPA; |
1023 | if (data && data[IFLA_MACVLAN_MODE]) | |
1024 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1025 | ||
df8ef8f3 JF |
1026 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1027 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1028 | ||
eb06acdc | 1029 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
5e3c516b | 1030 | if (port->count) |
eb06acdc SS |
1031 | return -EINVAL; |
1032 | port->passthru = true; | |
8b98604e | 1033 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1034 | } |
1035 | ||
5e3c516b | 1036 | port->count += 1; |
47d4ab91 JF |
1037 | err = register_netdevice(dev); |
1038 | if (err < 0) | |
1039 | goto destroy_port; | |
1040 | ||
a6cc0cfa | 1041 | dev->priv_flags |= IFF_MACVLAN; |
7cd43db7 JP |
1042 | err = netdev_upper_dev_link(lowerdev, dev); |
1043 | if (err) | |
da37705c | 1044 | goto unregister_netdev; |
b863ceb7 | 1045 | |
233c7df0 | 1046 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1047 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 1048 | |
b863ceb7 | 1049 | return 0; |
f16d3d57 | 1050 | |
da37705c CW |
1051 | unregister_netdev: |
1052 | unregister_netdevice(dev); | |
f16d3d57 | 1053 | destroy_port: |
5e3c516b DM |
1054 | port->count -= 1; |
1055 | if (!port->count) | |
f16d3d57 JP |
1056 | macvlan_port_destroy(lowerdev); |
1057 | ||
1058 | return err; | |
b863ceb7 | 1059 | } |
fc0663d6 | 1060 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1061 | |
fc0663d6 AB |
1062 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
1063 | struct nlattr *tb[], struct nlattr *data[]) | |
1064 | { | |
2f6a1b66 | 1065 | return macvlan_common_newlink(src_net, dev, tb, data); |
fc0663d6 AB |
1066 | } |
1067 | ||
1068 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1069 | { |
1070 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1071 | |
233c7df0 | 1072 | list_del_rcu(&vlan->list); |
23289a37 | 1073 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1074 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1075 | } |
fc0663d6 | 1076 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1077 | |
27c0b1a8 AB |
1078 | static int macvlan_changelink(struct net_device *dev, |
1079 | struct nlattr *tb[], struct nlattr *data[]) | |
1080 | { | |
1081 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1082 | enum macvlan_mode mode; |
1083 | bool set_mode = false; | |
1084 | ||
1085 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1086 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1087 | set_mode = true; | |
1088 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1089 | /* Passthrough mode can't be set or cleared dynamically */ | |
1090 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1091 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1092 | return -EINVAL; | |
1093 | } | |
99ffc3e7 | 1094 | |
df8ef8f3 JF |
1095 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1096 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1097 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
99ffc3e7 MT |
1098 | if (vlan->port->passthru && promisc) { |
1099 | int err; | |
1100 | ||
1101 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1102 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1103 | else | |
1104 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1105 | if (err < 0) | |
1106 | return err; | |
1107 | } | |
df8ef8f3 JF |
1108 | vlan->flags = flags; |
1109 | } | |
266e8347 MT |
1110 | if (set_mode) |
1111 | vlan->mode = mode; | |
27c0b1a8 AB |
1112 | return 0; |
1113 | } | |
1114 | ||
1115 | static size_t macvlan_get_size(const struct net_device *dev) | |
1116 | { | |
01fe944f ED |
1117 | return (0 |
1118 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1119 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
1120 | ); | |
27c0b1a8 AB |
1121 | } |
1122 | ||
1123 | static int macvlan_fill_info(struct sk_buff *skb, | |
1124 | const struct net_device *dev) | |
1125 | { | |
1126 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1127 | ||
ead9a76c DM |
1128 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1129 | goto nla_put_failure; | |
df8ef8f3 JF |
1130 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1131 | goto nla_put_failure; | |
27c0b1a8 AB |
1132 | return 0; |
1133 | ||
1134 | nla_put_failure: | |
1135 | return -EMSGSIZE; | |
1136 | } | |
1137 | ||
1138 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1139 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1140 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
27c0b1a8 AB |
1141 | }; |
1142 | ||
fc0663d6 AB |
1143 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1144 | { | |
1145 | /* common fields */ | |
1146 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
1147 | ops->validate = macvlan_validate; |
1148 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1149 | ops->policy = macvlan_policy; | |
1150 | ops->changelink = macvlan_changelink; | |
1151 | ops->get_size = macvlan_get_size; | |
1152 | ops->fill_info = macvlan_fill_info; | |
1153 | ||
1154 | return rtnl_link_register(ops); | |
1155 | }; | |
1156 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1157 | ||
1158 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 1159 | .kind = "macvlan", |
8a35747a | 1160 | .setup = macvlan_setup, |
b863ceb7 PM |
1161 | .newlink = macvlan_newlink, |
1162 | .dellink = macvlan_dellink, | |
1163 | }; | |
1164 | ||
1165 | static int macvlan_device_event(struct notifier_block *unused, | |
1166 | unsigned long event, void *ptr) | |
1167 | { | |
351638e7 | 1168 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1169 | struct macvlan_dev *vlan, *next; |
1170 | struct macvlan_port *port; | |
226bd341 | 1171 | LIST_HEAD(list_kill); |
b863ceb7 | 1172 | |
a35e2c1b | 1173 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
1174 | return NOTIFY_DONE; |
1175 | ||
e052f7e6 | 1176 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1177 | |
b863ceb7 PM |
1178 | switch (event) { |
1179 | case NETDEV_CHANGE: | |
1180 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1181 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1182 | vlan->dev); | |
b863ceb7 PM |
1183 | break; |
1184 | case NETDEV_FEAT_CHANGE: | |
1185 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1186 | vlan->dev->gso_max_size = dev->gso_max_size; |
797f87f8 | 1187 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1188 | } |
1189 | break; | |
3763e7ef | 1190 | case NETDEV_CHANGEMTU: |
1191 | list_for_each_entry(vlan, &port->vlans, list) { | |
1192 | if (vlan->dev->mtu <= dev->mtu) | |
1193 | continue; | |
1194 | dev_set_mtu(vlan->dev, dev->mtu); | |
1195 | } | |
e289fd28 | 1196 | break; |
1197 | case NETDEV_CHANGEADDR: | |
1198 | if (!port->passthru) | |
1199 | return NOTIFY_DONE; | |
1200 | ||
1201 | vlan = list_first_entry_or_null(&port->vlans, | |
1202 | struct macvlan_dev, | |
1203 | list); | |
1204 | ||
1205 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1206 | return NOTIFY_BAD; | |
1207 | ||
3763e7ef | 1208 | break; |
b863ceb7 | 1209 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1210 | /* twiddle thumbs on netns device moves */ |
1211 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1212 | break; | |
1213 | ||
b863ceb7 | 1214 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1215 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1216 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1217 | break; |
1c01fe14 JP |
1218 | case NETDEV_PRE_TYPE_CHANGE: |
1219 | /* Forbid underlaying device to change its type. */ | |
1220 | return NOTIFY_BAD; | |
4c991255 VY |
1221 | |
1222 | case NETDEV_NOTIFY_PEERS: | |
1223 | case NETDEV_BONDING_FAILOVER: | |
1224 | case NETDEV_RESEND_IGMP: | |
1225 | /* Propagate to all vlans */ | |
1226 | list_for_each_entry(vlan, &port->vlans, list) | |
1227 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1228 | } |
1229 | return NOTIFY_DONE; | |
1230 | } | |
1231 | ||
1232 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1233 | .notifier_call = macvlan_device_event, | |
1234 | }; | |
1235 | ||
1236 | static int __init macvlan_init_module(void) | |
1237 | { | |
1238 | int err; | |
1239 | ||
1240 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1241 | |
fc0663d6 | 1242 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1243 | if (err < 0) |
1244 | goto err1; | |
1245 | return 0; | |
1246 | err1: | |
b863ceb7 PM |
1247 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1248 | return err; | |
1249 | } | |
1250 | ||
1251 | static void __exit macvlan_cleanup_module(void) | |
1252 | { | |
1253 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1254 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1255 | } | |
1256 | ||
1257 | module_init(macvlan_init_module); | |
1258 | module_exit(macvlan_cleanup_module); | |
1259 | ||
1260 | MODULE_LICENSE("GPL"); | |
1261 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1262 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1263 | MODULE_ALIAS_RTNL_LINK("macvlan"); |