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> |
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 | 37 | |
79cf79ab MB |
38 | #define MACVLAN_HASH_BITS 8 |
39 | #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS) | |
07d92d5c | 40 | #define MACVLAN_BC_QUEUE_LEN 1000 |
b863ceb7 PM |
41 | |
42 | struct macvlan_port { | |
43 | struct net_device *dev; | |
44 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
45 | struct list_head vlans; | |
412ca155 HX |
46 | struct sk_buff_head bc_queue; |
47 | struct work_struct bc_work; | |
eb06acdc | 48 | bool passthru; |
5e3c516b | 49 | int count; |
79cf79ab | 50 | struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; |
9c127a01 | 51 | DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); |
79cf79ab MB |
52 | }; |
53 | ||
54 | struct macvlan_source_entry { | |
55 | struct hlist_node hlist; | |
56 | struct macvlan_dev *vlan; | |
57 | unsigned char addr[6+2] __aligned(sizeof(u16)); | |
58 | struct rcu_head rcu; | |
b863ceb7 PM |
59 | }; |
60 | ||
412ca155 HX |
61 | struct macvlan_skb_cb { |
62 | const struct macvlan_dev *src; | |
63 | }; | |
64 | ||
65 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
66 | ||
d5cd9244 EB |
67 | static void macvlan_port_destroy(struct net_device *dev); |
68 | ||
79cf79ab MB |
69 | /* Hash Ethernet address */ |
70 | static u32 macvlan_eth_hash(const unsigned char *addr) | |
71 | { | |
72 | u64 value = get_unaligned((u64 *)addr); | |
73 | ||
74 | /* only want 6 bytes */ | |
75 | #ifdef __BIG_ENDIAN | |
76 | value >>= 16; | |
77 | #else | |
78 | value <<= 16; | |
79 | #endif | |
80 | return hash_64(value, MACVLAN_HASH_BITS); | |
81 | } | |
82 | ||
e052f7e6 ED |
83 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
84 | { | |
85 | return rcu_dereference(dev->rx_handler_data); | |
86 | } | |
87 | ||
88 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
89 | { | |
90 | return rtnl_dereference(dev->rx_handler_data); | |
91 | } | |
92 | ||
a35e2c1b JP |
93 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
94 | ||
b863ceb7 PM |
95 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
96 | const unsigned char *addr) | |
97 | { | |
98 | struct macvlan_dev *vlan; | |
79cf79ab | 99 | u32 idx = macvlan_eth_hash(addr); |
b863ceb7 | 100 | |
79cf79ab | 101 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) { |
a6700db1 | 102 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
103 | return vlan; |
104 | } | |
105 | return NULL; | |
106 | } | |
107 | ||
79cf79ab MB |
108 | static struct macvlan_source_entry *macvlan_hash_lookup_source( |
109 | const struct macvlan_dev *vlan, | |
110 | const unsigned char *addr) | |
111 | { | |
112 | struct macvlan_source_entry *entry; | |
113 | u32 idx = macvlan_eth_hash(addr); | |
114 | struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; | |
115 | ||
116 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
117 | if (ether_addr_equal_64bits(entry->addr, addr) && | |
118 | entry->vlan == vlan) | |
119 | return entry; | |
120 | } | |
121 | return NULL; | |
122 | } | |
123 | ||
124 | static int macvlan_hash_add_source(struct macvlan_dev *vlan, | |
125 | const unsigned char *addr) | |
126 | { | |
127 | struct macvlan_port *port = vlan->port; | |
128 | struct macvlan_source_entry *entry; | |
129 | struct hlist_head *h; | |
130 | ||
131 | entry = macvlan_hash_lookup_source(vlan, addr); | |
132 | if (entry) | |
133 | return 0; | |
134 | ||
135 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
136 | if (!entry) | |
137 | return -ENOMEM; | |
138 | ||
139 | ether_addr_copy(entry->addr, addr); | |
140 | entry->vlan = vlan; | |
141 | h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; | |
142 | hlist_add_head_rcu(&entry->hlist, h); | |
143 | vlan->macaddr_count++; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
f9ac30f0 EB |
148 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
149 | { | |
150 | struct macvlan_port *port = vlan->port; | |
151 | const unsigned char *addr = vlan->dev->dev_addr; | |
79cf79ab | 152 | u32 idx = macvlan_eth_hash(addr); |
f9ac30f0 | 153 | |
79cf79ab MB |
154 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); |
155 | } | |
156 | ||
157 | static void macvlan_hash_del_source(struct macvlan_source_entry *entry) | |
158 | { | |
159 | hlist_del_rcu(&entry->hlist); | |
160 | kfree_rcu(entry, rcu); | |
f9ac30f0 EB |
161 | } |
162 | ||
449f4544 | 163 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
164 | { |
165 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
166 | if (sync) |
167 | synchronize_rcu(); | |
f9ac30f0 EB |
168 | } |
169 | ||
170 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
171 | const unsigned char *addr) | |
172 | { | |
449f4544 | 173 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
174 | /* Now that we are unhashed it is safe to change the device |
175 | * address without confusing packet delivery. | |
176 | */ | |
177 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
178 | macvlan_hash_add(vlan); | |
179 | } | |
180 | ||
d94d0254 GF |
181 | static bool macvlan_addr_busy(const struct macvlan_port *port, |
182 | const unsigned char *addr) | |
f9ac30f0 EB |
183 | { |
184 | /* Test to see if the specified multicast address is | |
185 | * currently in use by the underlying device or | |
186 | * another macvlan. | |
187 | */ | |
a6700db1 | 188 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
d94d0254 | 189 | return true; |
f9ac30f0 EB |
190 | |
191 | if (macvlan_hash_lookup(port, addr)) | |
d94d0254 | 192 | return true; |
f9ac30f0 | 193 | |
d94d0254 | 194 | return false; |
f9ac30f0 EB |
195 | } |
196 | ||
a1e514c5 | 197 | |
fc0663d6 AB |
198 | static int macvlan_broadcast_one(struct sk_buff *skb, |
199 | const struct macvlan_dev *vlan, | |
618e1b74 | 200 | const struct ethhdr *eth, bool local) |
a1e514c5 | 201 | { |
fc0663d6 | 202 | struct net_device *dev = vlan->dev; |
a1e514c5 | 203 | |
618e1b74 | 204 | if (local) |
412ca155 | 205 | return __dev_forward_skb(dev, skb); |
618e1b74 | 206 | |
a1e514c5 | 207 | skb->dev = dev; |
a6700db1 | 208 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
209 | skb->pkt_type = PACKET_BROADCAST; |
210 | else | |
211 | skb->pkt_type = PACKET_MULTICAST; | |
212 | ||
412ca155 | 213 | return 0; |
a1e514c5 AB |
214 | } |
215 | ||
3807ff58 ED |
216 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
217 | { | |
218 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
219 | } | |
220 | ||
221 | ||
222 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
223 | const unsigned char *addr) | |
cd431e73 ED |
224 | { |
225 | u32 val = __get_unaligned_cpu32(addr + 2); | |
226 | ||
3807ff58 | 227 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
228 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
229 | } | |
230 | ||
b863ceb7 | 231 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
232 | const struct macvlan_port *port, |
233 | struct net_device *src, | |
234 | enum macvlan_mode mode) | |
b863ceb7 PM |
235 | { |
236 | const struct ethhdr *eth = eth_hdr(skb); | |
237 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
238 | struct sk_buff *nskb; |
239 | unsigned int i; | |
a1e514c5 | 240 | int err; |
3807ff58 | 241 | unsigned int hash; |
b863ceb7 | 242 | |
efbbced3 PM |
243 | if (skb->protocol == htons(ETH_P_PAUSE)) |
244 | return; | |
245 | ||
b863ceb7 | 246 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 247 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
248 | if (vlan->dev == src || !(vlan->mode & mode)) |
249 | continue; | |
250 | ||
3807ff58 | 251 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
252 | if (!test_bit(hash, vlan->mc_filter)) |
253 | continue; | |
de9e8f3f HX |
254 | |
255 | err = NET_RX_DROP; | |
b863ceb7 | 256 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
257 | if (likely(nskb)) |
258 | err = macvlan_broadcast_one( | |
259 | nskb, vlan, eth, | |
412ca155 HX |
260 | mode == MACVLAN_MODE_BRIDGE) ?: |
261 | netif_rx_ni(nskb); | |
a1e514c5 | 262 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
4c979935 | 263 | err == NET_RX_SUCCESS, true); |
b863ceb7 PM |
264 | } |
265 | } | |
266 | } | |
267 | ||
412ca155 | 268 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 269 | { |
412ca155 HX |
270 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
271 | bc_work); | |
272 | struct sk_buff *skb; | |
273 | struct sk_buff_head list; | |
274 | ||
fe0ca732 | 275 | __skb_queue_head_init(&list); |
412ca155 HX |
276 | |
277 | spin_lock_bh(&port->bc_queue.lock); | |
278 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
279 | spin_unlock_bh(&port->bc_queue.lock); | |
280 | ||
281 | while ((skb = __skb_dequeue(&list))) { | |
282 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
283 | ||
284 | rcu_read_lock(); | |
b863ceb7 | 285 | |
618e1b74 AB |
286 | if (!src) |
287 | /* frame comes from an external address */ | |
288 | macvlan_broadcast(skb, port, NULL, | |
289 | MACVLAN_MODE_PRIVATE | | |
290 | MACVLAN_MODE_VEPA | | |
eb06acdc | 291 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
292 | MACVLAN_MODE_BRIDGE); |
293 | else if (src->mode == MACVLAN_MODE_VEPA) | |
294 | /* flood to everyone except source */ | |
295 | macvlan_broadcast(skb, port, src->dev, | |
296 | MACVLAN_MODE_VEPA | | |
297 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 298 | else |
618e1b74 AB |
299 | /* |
300 | * flood only to VEPA ports, bridge ports | |
301 | * already saw the frame on the way out. | |
302 | */ | |
303 | macvlan_broadcast(skb, port, src->dev, | |
304 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
305 | |
306 | rcu_read_unlock(); | |
307 | ||
260916df HX |
308 | if (src) |
309 | dev_put(src->dev); | |
412ca155 HX |
310 | kfree_skb(skb); |
311 | } | |
312 | } | |
313 | ||
314 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
260916df | 315 | const struct macvlan_dev *src, |
412ca155 HX |
316 | struct sk_buff *skb) |
317 | { | |
e676f197 | 318 | struct sk_buff *nskb; |
412ca155 HX |
319 | int err = -ENOMEM; |
320 | ||
e676f197 HX |
321 | nskb = skb_clone(skb, GFP_ATOMIC); |
322 | if (!nskb) | |
412ca155 HX |
323 | goto err; |
324 | ||
260916df HX |
325 | MACVLAN_SKB_CB(nskb)->src = src; |
326 | ||
412ca155 | 327 | spin_lock(&port->bc_queue.lock); |
07d92d5c | 328 | if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { |
260916df HX |
329 | if (src) |
330 | dev_hold(src->dev); | |
e676f197 | 331 | __skb_queue_tail(&port->bc_queue, nskb); |
412ca155 HX |
332 | err = 0; |
333 | } | |
334 | spin_unlock(&port->bc_queue.lock); | |
335 | ||
336 | if (err) | |
e676f197 | 337 | goto free_nskb; |
412ca155 HX |
338 | |
339 | schedule_work(&port->bc_work); | |
340 | return; | |
341 | ||
e676f197 HX |
342 | free_nskb: |
343 | kfree_skb(nskb); | |
412ca155 HX |
344 | err: |
345 | atomic_long_inc(&skb->dev->rx_dropped); | |
346 | } | |
347 | ||
79cf79ab MB |
348 | static void macvlan_flush_sources(struct macvlan_port *port, |
349 | struct macvlan_dev *vlan) | |
350 | { | |
351 | int i; | |
352 | ||
353 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
354 | struct hlist_node *h, *n; | |
355 | ||
356 | hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { | |
357 | struct macvlan_source_entry *entry; | |
358 | ||
359 | entry = hlist_entry(h, struct macvlan_source_entry, | |
360 | hlist); | |
361 | if (entry->vlan == vlan) | |
362 | macvlan_hash_del_source(entry); | |
363 | } | |
364 | } | |
365 | vlan->macaddr_count = 0; | |
366 | } | |
367 | ||
368 | static void macvlan_forward_source_one(struct sk_buff *skb, | |
369 | struct macvlan_dev *vlan) | |
370 | { | |
371 | struct sk_buff *nskb; | |
372 | struct net_device *dev; | |
373 | int len; | |
374 | int ret; | |
375 | ||
376 | dev = vlan->dev; | |
377 | if (unlikely(!(dev->flags & IFF_UP))) | |
378 | return; | |
379 | ||
380 | nskb = skb_clone(skb, GFP_ATOMIC); | |
381 | if (!nskb) | |
382 | return; | |
383 | ||
384 | len = nskb->len + ETH_HLEN; | |
385 | nskb->dev = dev; | |
386 | nskb->pkt_type = PACKET_HOST; | |
387 | ||
388 | ret = netif_rx(nskb); | |
4c979935 | 389 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
79cf79ab MB |
390 | } |
391 | ||
392 | static void macvlan_forward_source(struct sk_buff *skb, | |
393 | struct macvlan_port *port, | |
394 | const unsigned char *addr) | |
395 | { | |
396 | struct macvlan_source_entry *entry; | |
397 | u32 idx = macvlan_eth_hash(addr); | |
398 | struct hlist_head *h = &port->vlan_source_hash[idx]; | |
399 | ||
400 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
401 | if (ether_addr_equal_64bits(entry->addr, addr)) | |
fc51f2b7 | 402 | macvlan_forward_source_one(skb, entry->vlan); |
79cf79ab MB |
403 | } |
404 | } | |
405 | ||
412ca155 HX |
406 | /* called under rcu_read_lock() from netif_receive_skb */ |
407 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
408 | { | |
409 | struct macvlan_port *port; | |
410 | struct sk_buff *skb = *pskb; | |
411 | const struct ethhdr *eth = eth_hdr(skb); | |
412 | const struct macvlan_dev *vlan; | |
413 | const struct macvlan_dev *src; | |
414 | struct net_device *dev; | |
415 | unsigned int len = 0; | |
d1dd9119 | 416 | int ret; |
417 | rx_handler_result_t handle_res; | |
412ca155 HX |
418 | |
419 | port = macvlan_port_get_rcu(skb->dev); | |
420 | if (is_multicast_ether_addr(eth->h_dest)) { | |
9c127a01 HX |
421 | unsigned int hash; |
422 | ||
19bcf9f2 | 423 | skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN); |
412ca155 HX |
424 | if (!skb) |
425 | return RX_HANDLER_CONSUMED; | |
e639b8d8 | 426 | *pskb = skb; |
412ca155 | 427 | eth = eth_hdr(skb); |
79cf79ab | 428 | macvlan_forward_source(skb, port, eth->h_source); |
412ca155 HX |
429 | src = macvlan_hash_lookup(port, eth->h_source); |
430 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
431 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 432 | /* forward to original port. */ |
433 | vlan = src; | |
412ca155 HX |
434 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
435 | netif_rx(skb); | |
d1dd9119 | 436 | handle_res = RX_HANDLER_CONSUMED; |
729e72a1 | 437 | goto out; |
438 | } | |
439 | ||
9c127a01 HX |
440 | hash = mc_hash(NULL, eth->h_dest); |
441 | if (test_bit(hash, port->mc_filter)) | |
442 | macvlan_broadcast_enqueue(port, src, skb); | |
412ca155 | 443 | |
8a4eb573 | 444 | return RX_HANDLER_PASS; |
b863ceb7 PM |
445 | } |
446 | ||
79cf79ab | 447 | macvlan_forward_source(skb, port, eth->h_source); |
eb06acdc | 448 | if (port->passthru) |
233c7df0 JP |
449 | vlan = list_first_or_null_rcu(&port->vlans, |
450 | struct macvlan_dev, list); | |
eb06acdc SS |
451 | else |
452 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 453 | if (vlan == NULL) |
8a4eb573 | 454 | return RX_HANDLER_PASS; |
b863ceb7 PM |
455 | |
456 | dev = vlan->dev; | |
457 | if (unlikely(!(dev->flags & IFF_UP))) { | |
458 | kfree_skb(skb); | |
8a4eb573 | 459 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 460 | } |
a1e514c5 | 461 | len = skb->len + ETH_HLEN; |
b863ceb7 | 462 | skb = skb_share_check(skb, GFP_ATOMIC); |
d1dd9119 | 463 | if (!skb) { |
464 | ret = NET_RX_DROP; | |
465 | handle_res = RX_HANDLER_CONSUMED; | |
ba01877f | 466 | goto out; |
d1dd9119 | 467 | } |
b863ceb7 | 468 | |
e639b8d8 | 469 | *pskb = skb; |
b863ceb7 PM |
470 | skb->dev = dev; |
471 | skb->pkt_type = PACKET_HOST; | |
472 | ||
d1dd9119 | 473 | ret = NET_RX_SUCCESS; |
474 | handle_res = RX_HANDLER_ANOTHER; | |
ba01877f | 475 | out: |
4c979935 | 476 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
d1dd9119 | 477 | return handle_res; |
b863ceb7 PM |
478 | } |
479 | ||
618e1b74 AB |
480 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
481 | { | |
482 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
483 | const struct macvlan_port *port = vlan->port; | |
484 | const struct macvlan_dev *dest; | |
485 | ||
486 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
487 | const struct ethhdr *eth = (void *)skb->data; | |
488 | ||
489 | /* send to other bridge ports directly */ | |
490 | if (is_multicast_ether_addr(eth->h_dest)) { | |
491 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
492 | goto xmit_world; | |
493 | } | |
494 | ||
495 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
496 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 497 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 498 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
499 | |
500 | return NET_XMIT_SUCCESS; | |
501 | } | |
502 | } | |
503 | ||
504 | xmit_world: | |
59b9997b | 505 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
506 | return dev_queue_xmit(skb); |
507 | } | |
508 | ||
688cea83 | 509 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
510 | { | |
511 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
512 | if (vlan->netpoll) | |
513 | netpoll_send_skb(vlan->netpoll, skb); | |
514 | #else | |
515 | BUG(); | |
516 | #endif | |
517 | return NETDEV_TX_OK; | |
518 | } | |
519 | ||
0db901bd | 520 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
521 | struct net_device *dev) | |
b863ceb7 | 522 | { |
b863ceb7 PM |
523 | unsigned int len = skb->len; |
524 | int ret; | |
688cea83 | 525 | struct macvlan_dev *vlan = netdev_priv(dev); |
526 | ||
527 | if (unlikely(netpoll_tx_running(dev))) | |
528 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 529 | |
a6cc0cfa JF |
530 | if (vlan->fwd_priv) { |
531 | skb->dev = vlan->lowerdev; | |
f663dd9a | 532 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
a6cc0cfa JF |
533 | } else { |
534 | ret = macvlan_queue_xmit(skb, dev); | |
535 | } | |
536 | ||
2d6c9ffc | 537 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 538 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 539 | |
8ffab51b ED |
540 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
541 | u64_stats_update_begin(&pcpu_stats->syncp); | |
542 | pcpu_stats->tx_packets++; | |
543 | pcpu_stats->tx_bytes += len; | |
544 | u64_stats_update_end(&pcpu_stats->syncp); | |
545 | } else { | |
546 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
547 | } | |
cbbef5e1 | 548 | return ret; |
b863ceb7 PM |
549 | } |
550 | ||
551 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
552 | unsigned short type, const void *daddr, |
553 | const void *saddr, unsigned len) | |
b863ceb7 PM |
554 | { |
555 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
556 | struct net_device *lowerdev = vlan->lowerdev; | |
557 | ||
0c4e8581 SH |
558 | return dev_hard_header(skb, lowerdev, type, daddr, |
559 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
560 | } |
561 | ||
3b04ddde SH |
562 | static const struct header_ops macvlan_hard_header_ops = { |
563 | .create = macvlan_hard_header, | |
3b04ddde | 564 | .parse = eth_header_parse, |
3b04ddde SH |
565 | .cache = eth_header_cache, |
566 | .cache_update = eth_header_cache_update, | |
567 | }; | |
568 | ||
b13ba1b8 JW |
569 | static struct rtnl_link_ops macvlan_link_ops; |
570 | ||
b863ceb7 PM |
571 | static int macvlan_open(struct net_device *dev) |
572 | { | |
573 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
574 | struct net_device *lowerdev = vlan->lowerdev; |
575 | int err; | |
576 | ||
eb06acdc | 577 | if (vlan->port->passthru) { |
78738141 MT |
578 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
579 | err = dev_set_promiscuity(lowerdev, 1); | |
580 | if (err < 0) | |
581 | goto out; | |
582 | } | |
eb06acdc SS |
583 | goto hash_add; |
584 | } | |
585 | ||
b13ba1b8 JW |
586 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD && |
587 | dev->rtnl_link_ops == &macvlan_link_ops) { | |
a6cc0cfa JF |
588 | vlan->fwd_priv = |
589 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); | |
590 | ||
591 | /* If we get a NULL pointer back, or if we get an error | |
592 | * then we should just fall through to the non accelerated path | |
593 | */ | |
594 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { | |
595 | vlan->fwd_priv = NULL; | |
f663dd9a | 596 | } else |
a6cc0cfa | 597 | return 0; |
a6cc0cfa JF |
598 | } |
599 | ||
f9ac30f0 EB |
600 | err = -EBUSY; |
601 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
602 | goto out; | |
603 | ||
a748ee24 | 604 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 605 | if (err < 0) |
b89fb7da WC |
606 | goto out; |
607 | if (dev->flags & IFF_ALLMULTI) { | |
608 | err = dev_set_allmulti(lowerdev, 1); | |
609 | if (err < 0) | |
610 | goto del_unicast; | |
611 | } | |
eb06acdc | 612 | |
efdbd2b3 VY |
613 | if (dev->flags & IFF_PROMISC) { |
614 | err = dev_set_promiscuity(lowerdev, 1); | |
615 | if (err < 0) | |
616 | goto clear_multi; | |
617 | } | |
618 | ||
eb06acdc | 619 | hash_add: |
f9ac30f0 | 620 | macvlan_hash_add(vlan); |
b863ceb7 | 621 | return 0; |
b89fb7da | 622 | |
efdbd2b3 | 623 | clear_multi: |
c3891fa2 GF |
624 | if (dev->flags & IFF_ALLMULTI) |
625 | dev_set_allmulti(lowerdev, -1); | |
b89fb7da | 626 | del_unicast: |
a748ee24 | 627 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da | 628 | out: |
a6cc0cfa JF |
629 | if (vlan->fwd_priv) { |
630 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
631 | vlan->fwd_priv); | |
632 | vlan->fwd_priv = NULL; | |
633 | } | |
b89fb7da | 634 | return err; |
b863ceb7 PM |
635 | } |
636 | ||
637 | static int macvlan_stop(struct net_device *dev) | |
638 | { | |
639 | struct macvlan_dev *vlan = netdev_priv(dev); | |
640 | struct net_device *lowerdev = vlan->lowerdev; | |
641 | ||
a6cc0cfa JF |
642 | if (vlan->fwd_priv) { |
643 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
644 | vlan->fwd_priv); | |
645 | vlan->fwd_priv = NULL; | |
646 | return 0; | |
647 | } | |
648 | ||
df8ef8f3 JF |
649 | dev_uc_unsync(lowerdev, dev); |
650 | dev_mc_unsync(lowerdev, dev); | |
651 | ||
eb06acdc | 652 | if (vlan->port->passthru) { |
df8ef8f3 JF |
653 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
654 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
655 | goto hash_del; |
656 | } | |
657 | ||
b863ceb7 PM |
658 | if (dev->flags & IFF_ALLMULTI) |
659 | dev_set_allmulti(lowerdev, -1); | |
660 | ||
efdbd2b3 VY |
661 | if (dev->flags & IFF_PROMISC) |
662 | dev_set_promiscuity(lowerdev, -1); | |
663 | ||
a748ee24 | 664 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 665 | |
eb06acdc | 666 | hash_del: |
449f4544 | 667 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
668 | return 0; |
669 | } | |
670 | ||
e289fd28 | 671 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
672 | { |
673 | struct macvlan_dev *vlan = netdev_priv(dev); | |
674 | struct net_device *lowerdev = vlan->lowerdev; | |
ad5d20a6 PM |
675 | int err; |
676 | ||
f9ac30f0 EB |
677 | if (!(dev->flags & IFF_UP)) { |
678 | /* Just copy in the new address */ | |
e289fd28 | 679 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
680 | } else { |
681 | /* Rehash and update the device filters */ | |
e289fd28 | 682 | if (macvlan_addr_busy(vlan->port, addr)) |
f9ac30f0 | 683 | return -EBUSY; |
ad5d20a6 | 684 | |
e289fd28 | 685 | if (!vlan->port->passthru) { |
686 | err = dev_uc_add(lowerdev, addr); | |
687 | if (err) | |
688 | return err; | |
ad5d20a6 | 689 | |
e289fd28 | 690 | dev_uc_del(lowerdev, dev->dev_addr); |
691 | } | |
f9ac30f0 | 692 | |
e289fd28 | 693 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 694 | } |
ad5d20a6 PM |
695 | return 0; |
696 | } | |
697 | ||
e289fd28 | 698 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
699 | { | |
700 | struct macvlan_dev *vlan = netdev_priv(dev); | |
701 | struct sockaddr *addr = p; | |
702 | ||
703 | if (!is_valid_ether_addr(addr->sa_data)) | |
704 | return -EADDRNOTAVAIL; | |
705 | ||
706 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { | |
707 | dev_set_mac_address(vlan->lowerdev, addr); | |
708 | return 0; | |
709 | } | |
710 | ||
711 | return macvlan_sync_address(dev, addr->sa_data); | |
712 | } | |
713 | ||
b863ceb7 PM |
714 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
715 | { | |
716 | struct macvlan_dev *vlan = netdev_priv(dev); | |
717 | struct net_device *lowerdev = vlan->lowerdev; | |
718 | ||
bbeb0ead PC |
719 | if (dev->flags & IFF_UP) { |
720 | if (change & IFF_ALLMULTI) | |
721 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
efdbd2b3 VY |
722 | if (change & IFF_PROMISC) |
723 | dev_set_promiscuity(lowerdev, | |
724 | dev->flags & IFF_PROMISC ? 1 : -1); | |
725 | ||
bbeb0ead | 726 | } |
b863ceb7 PM |
727 | } |
728 | ||
9c127a01 HX |
729 | static void macvlan_compute_filter(unsigned long *mc_filter, |
730 | struct net_device *dev, | |
731 | struct macvlan_dev *vlan) | |
b863ceb7 | 732 | { |
cd431e73 | 733 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
9c127a01 | 734 | bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 ED |
735 | } else { |
736 | struct netdev_hw_addr *ha; | |
737 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
738 | ||
739 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
740 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 741 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 742 | } |
d5270430 | 743 | |
3807ff58 | 744 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 745 | |
9c127a01 | 746 | bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 | 747 | } |
9c127a01 HX |
748 | } |
749 | ||
750 | static void macvlan_set_mac_lists(struct net_device *dev) | |
751 | { | |
752 | struct macvlan_dev *vlan = netdev_priv(dev); | |
753 | ||
754 | macvlan_compute_filter(vlan->mc_filter, dev, vlan); | |
755 | ||
df8ef8f3 | 756 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 | 757 | dev_mc_sync(vlan->lowerdev, dev); |
9c127a01 HX |
758 | |
759 | /* This is slightly inaccurate as we're including the subscription | |
760 | * list of vlan->lowerdev too. | |
761 | * | |
762 | * Bug alert: This only works if everyone has the same broadcast | |
763 | * address as lowerdev. As soon as someone changes theirs this | |
764 | * will break. | |
765 | * | |
766 | * However, this is already broken as when you change your broadcast | |
767 | * address we don't get called. | |
768 | * | |
769 | * The solution is to maintain a list of broadcast addresses like | |
770 | * we do for uc/mc, if you care. | |
771 | */ | |
772 | macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL); | |
b863ceb7 PM |
773 | } |
774 | ||
775 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
776 | { | |
777 | struct macvlan_dev *vlan = netdev_priv(dev); | |
778 | ||
91572088 | 779 | if (vlan->lowerdev->mtu < new_mtu) |
b863ceb7 PM |
780 | return -EINVAL; |
781 | dev->mtu = new_mtu; | |
782 | return 0; | |
783 | } | |
784 | ||
785 | /* | |
786 | * macvlan network devices have devices nesting below it and are a special | |
787 | * "super class" of normal network devices; split their locks off into a | |
788 | * separate class since they always nest. | |
789 | */ | |
cf508b12 | 790 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 791 | |
70957eae VY |
792 | #define ALWAYS_ON_OFFLOADS \ |
793 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \ | |
a523a5ec | 794 | NETIF_F_GSO_ROBUST) |
8b4703e9 | 795 | |
70957eae VY |
796 | #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX) |
797 | ||
b863ceb7 | 798 | #define MACVLAN_FEATURES \ |
a188222b | 799 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
62dbe830 | 800 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \ |
8d13e670 | 801 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 802 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
803 | |
804 | #define MACVLAN_STATE_MASK \ | |
805 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
806 | ||
c674ac30 VY |
807 | static int macvlan_get_nest_level(struct net_device *dev) |
808 | { | |
809 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
810 | } | |
811 | ||
c773e847 DM |
812 | static void macvlan_set_lockdep_class(struct net_device *dev) |
813 | { | |
24ffd752 | 814 | netdev_lockdep_set_classes(dev); |
c674ac30 VY |
815 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
816 | &macvlan_netdev_addr_lock_key, | |
817 | macvlan_get_nest_level(dev)); | |
c773e847 DM |
818 | } |
819 | ||
b863ceb7 PM |
820 | static int macvlan_init(struct net_device *dev) |
821 | { | |
822 | struct macvlan_dev *vlan = netdev_priv(dev); | |
823 | const struct net_device *lowerdev = vlan->lowerdev; | |
30837960 | 824 | struct macvlan_port *port = vlan->port; |
b863ceb7 PM |
825 | |
826 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
827 | (lowerdev->state & MACVLAN_STATE_MASK); | |
828 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 829 | dev->features |= ALWAYS_ON_FEATURES; |
62dbe830 | 830 | dev->hw_features |= NETIF_F_LRO; |
081e83a7 | 831 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
70957eae | 832 | dev->vlan_features |= ALWAYS_ON_OFFLOADS; |
8c2acc53 | 833 | dev->gso_max_size = lowerdev->gso_max_size; |
f6773c5e | 834 | dev->gso_max_segs = lowerdev->gso_max_segs; |
ef5c8996 | 835 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 836 | |
c773e847 DM |
837 | macvlan_set_lockdep_class(dev); |
838 | ||
1c213bd2 | 839 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 840 | if (!vlan->pcpu_stats) |
fccaf710 ED |
841 | return -ENOMEM; |
842 | ||
30837960 FR |
843 | port->count += 1; |
844 | ||
b863ceb7 PM |
845 | return 0; |
846 | } | |
847 | ||
fccaf710 ED |
848 | static void macvlan_uninit(struct net_device *dev) |
849 | { | |
850 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 851 | struct macvlan_port *port = vlan->port; |
fccaf710 | 852 | |
8ffab51b | 853 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 854 | |
79cf79ab | 855 | macvlan_flush_sources(port, vlan); |
5e3c516b DM |
856 | port->count -= 1; |
857 | if (!port->count) | |
d5cd9244 | 858 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
859 | } |
860 | ||
bc1f4470 | 861 | static void macvlan_dev_get_stats64(struct net_device *dev, |
862 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 863 | { |
fccaf710 ED |
864 | struct macvlan_dev *vlan = netdev_priv(dev); |
865 | ||
8ffab51b | 866 | if (vlan->pcpu_stats) { |
cdf3e274 | 867 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
868 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
869 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 870 | unsigned int start; |
fccaf710 ED |
871 | int i; |
872 | ||
873 | for_each_possible_cpu(i) { | |
8ffab51b | 874 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 875 | do { |
57a7744e | 876 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
877 | rx_packets = p->rx_packets; |
878 | rx_bytes = p->rx_bytes; | |
879 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
880 | tx_packets = p->tx_packets; |
881 | tx_bytes = p->tx_bytes; | |
57a7744e | 882 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
883 | |
884 | stats->rx_packets += rx_packets; | |
885 | stats->rx_bytes += rx_bytes; | |
886 | stats->multicast += rx_multicast; | |
887 | stats->tx_packets += tx_packets; | |
888 | stats->tx_bytes += tx_bytes; | |
889 | /* rx_errors & tx_dropped are u32, updated | |
890 | * without syncp protection. | |
891 | */ | |
892 | rx_errors += p->rx_errors; | |
893 | tx_dropped += p->tx_dropped; | |
fccaf710 | 894 | } |
8ffab51b ED |
895 | stats->rx_errors = rx_errors; |
896 | stats->rx_dropped = rx_errors; | |
897 | stats->tx_dropped = tx_dropped; | |
fccaf710 | 898 | } |
fccaf710 ED |
899 | } |
900 | ||
8e586137 | 901 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 902 | __be16 proto, u16 vid) |
8d13e670 JF |
903 | { |
904 | struct macvlan_dev *vlan = netdev_priv(dev); | |
905 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 906 | |
80d5c368 | 907 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
908 | } |
909 | ||
8e586137 | 910 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 911 | __be16 proto, u16 vid) |
8d13e670 JF |
912 | { |
913 | struct macvlan_dev *vlan = netdev_priv(dev); | |
914 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 915 | |
80d5c368 | 916 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 917 | return 0; |
8d13e670 JF |
918 | } |
919 | ||
edc7d573 | 920 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 921 | struct net_device *dev, |
f6f6424b | 922 | const unsigned char *addr, u16 vid, |
df8ef8f3 JF |
923 | u16 flags) |
924 | { | |
925 | struct macvlan_dev *vlan = netdev_priv(dev); | |
926 | int err = -EINVAL; | |
927 | ||
8a50f11c VY |
928 | /* Support unicast filter only on passthru devices. |
929 | * Multicast filter should be allowed on all devices. | |
930 | */ | |
931 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
932 | return -EOPNOTSUPP; |
933 | ||
ab2cfbb2 TR |
934 | if (flags & NLM_F_REPLACE) |
935 | return -EOPNOTSUPP; | |
936 | ||
df8ef8f3 JF |
937 | if (is_unicast_ether_addr(addr)) |
938 | err = dev_uc_add_excl(dev, addr); | |
939 | else if (is_multicast_ether_addr(addr)) | |
940 | err = dev_mc_add_excl(dev, addr); | |
941 | ||
942 | return err; | |
943 | } | |
944 | ||
1690be63 | 945 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 946 | struct net_device *dev, |
f6f6424b | 947 | const unsigned char *addr, u16 vid) |
df8ef8f3 JF |
948 | { |
949 | struct macvlan_dev *vlan = netdev_priv(dev); | |
950 | int err = -EINVAL; | |
951 | ||
8a50f11c VY |
952 | /* Support unicast filter only on passthru devices. |
953 | * Multicast filter should be allowed on all devices. | |
954 | */ | |
955 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
956 | return -EOPNOTSUPP; |
957 | ||
958 | if (is_unicast_ether_addr(addr)) | |
959 | err = dev_uc_del(dev, addr); | |
960 | else if (is_multicast_ether_addr(addr)) | |
961 | err = dev_mc_del(dev, addr); | |
962 | ||
963 | return err; | |
964 | } | |
965 | ||
b863ceb7 PM |
966 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
967 | struct ethtool_drvinfo *drvinfo) | |
968 | { | |
7826d43f JP |
969 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
970 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
971 | } |
972 | ||
85f95819 DD |
973 | static int macvlan_ethtool_get_link_ksettings(struct net_device *dev, |
974 | struct ethtool_link_ksettings *cmd) | |
9edb8bb6 SH |
975 | { |
976 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 | 977 | |
85f95819 | 978 | return __ethtool_get_link_ksettings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
979 | } |
980 | ||
2be5c767 VY |
981 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
982 | netdev_features_t features) | |
983 | { | |
984 | struct macvlan_dev *vlan = netdev_priv(dev); | |
62dbe830 | 985 | netdev_features_t lowerdev_features = vlan->lowerdev->features; |
797f87f8 | 986 | netdev_features_t mask; |
2be5c767 | 987 | |
797f87f8 FW |
988 | features |= NETIF_F_ALL_FOR_ALL; |
989 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
990 | mask = features; | |
991 | ||
62dbe830 MK |
992 | lowerdev_features &= (features | ~NETIF_F_LRO); |
993 | features = netdev_increment_features(lowerdev_features, features, mask); | |
8b4703e9 | 994 | features |= ALWAYS_ON_FEATURES; |
0d0162e7 | 995 | features &= ~NETIF_F_NETNS_LOCAL; |
797f87f8 FW |
996 | |
997 | return features; | |
2be5c767 VY |
998 | } |
999 | ||
688cea83 | 1000 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1001 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
1002 | { | |
1003 | return; | |
1004 | } | |
1005 | ||
1006 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
1007 | { | |
1008 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1009 | struct net_device *real_dev = vlan->lowerdev; | |
1010 | struct netpoll *netpoll; | |
1011 | int err = 0; | |
1012 | ||
1013 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
1014 | err = -ENOMEM; | |
1015 | if (!netpoll) | |
1016 | goto out; | |
1017 | ||
1018 | err = __netpoll_setup(netpoll, real_dev); | |
1019 | if (err) { | |
1020 | kfree(netpoll); | |
1021 | goto out; | |
1022 | } | |
1023 | ||
1024 | vlan->netpoll = netpoll; | |
1025 | ||
1026 | out: | |
1027 | return err; | |
1028 | } | |
1029 | ||
1030 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
1031 | { | |
1032 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1033 | struct netpoll *netpoll = vlan->netpoll; | |
1034 | ||
1035 | if (!netpoll) | |
1036 | return; | |
1037 | ||
1038 | vlan->netpoll = NULL; | |
1039 | ||
1040 | __netpoll_free_async(netpoll); | |
1041 | } | |
1042 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1043 | ||
ef5fa6bc ND |
1044 | static int macvlan_dev_get_iflink(const struct net_device *dev) |
1045 | { | |
1046 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1047 | ||
1048 | return vlan->lowerdev->ifindex; | |
1049 | } | |
1050 | ||
b863ceb7 PM |
1051 | static const struct ethtool_ops macvlan_ethtool_ops = { |
1052 | .get_link = ethtool_op_get_link, | |
85f95819 | 1053 | .get_link_ksettings = macvlan_ethtool_get_link_ksettings, |
b863ceb7 PM |
1054 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
1055 | }; | |
1056 | ||
54a30c97 SH |
1057 | static const struct net_device_ops macvlan_netdev_ops = { |
1058 | .ndo_init = macvlan_init, | |
fccaf710 | 1059 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
1060 | .ndo_open = macvlan_open, |
1061 | .ndo_stop = macvlan_stop, | |
00829823 | 1062 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 1063 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 1064 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
1065 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
1066 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 1067 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 1068 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 1069 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
1070 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
1071 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
1072 | .ndo_fdb_add = macvlan_fdb_add, |
1073 | .ndo_fdb_del = macvlan_fdb_del, | |
1074 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 1075 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
688cea83 | 1076 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1077 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
1078 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
1079 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
1080 | #endif | |
ef5fa6bc | 1081 | .ndo_get_iflink = macvlan_dev_get_iflink, |
f56e67b5 | 1082 | .ndo_features_check = passthru_features_check, |
54a30c97 SH |
1083 | }; |
1084 | ||
8a35747a | 1085 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
1086 | { |
1087 | ether_setup(dev); | |
1088 | ||
91572088 JW |
1089 | dev->min_mtu = 0; |
1090 | dev->max_mtu = ETH_MAX_MTU; | |
02875878 ED |
1091 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1092 | netif_keep_dst(dev); | |
87ab7f6f | 1093 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 1094 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 1095 | dev->destructor = free_netdev; |
71740129 | 1096 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 1097 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
1098 | } |
1099 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
1100 | ||
1101 | static void macvlan_setup(struct net_device *dev) | |
1102 | { | |
1103 | macvlan_common_setup(dev); | |
7009212b | 1104 | dev->priv_flags |= IFF_NO_QUEUE; |
b863ceb7 PM |
1105 | } |
1106 | ||
1107 | static int macvlan_port_create(struct net_device *dev) | |
1108 | { | |
1109 | struct macvlan_port *port; | |
1110 | unsigned int i; | |
ab95bfe0 | 1111 | int err; |
b863ceb7 PM |
1112 | |
1113 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
1114 | return -EINVAL; | |
1115 | ||
322dc6e0 | 1116 | if (netdev_is_rx_handler_busy(dev)) |
d6b00fec MB |
1117 | return -EBUSY; |
1118 | ||
b863ceb7 PM |
1119 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1120 | if (port == NULL) | |
1121 | return -ENOMEM; | |
1122 | ||
eb06acdc | 1123 | port->passthru = false; |
b863ceb7 PM |
1124 | port->dev = dev; |
1125 | INIT_LIST_HEAD(&port->vlans); | |
1126 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
1127 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
79cf79ab MB |
1128 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
1129 | INIT_HLIST_HEAD(&port->vlan_source_hash[i]); | |
ab95bfe0 | 1130 | |
412ca155 HX |
1131 | skb_queue_head_init(&port->bc_queue); |
1132 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
1133 | ||
a35e2c1b JP |
1134 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
1135 | if (err) | |
ab95bfe0 | 1136 | kfree(port); |
d9351561 ED |
1137 | else |
1138 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 1139 | return err; |
b863ceb7 PM |
1140 | } |
1141 | ||
1142 | static void macvlan_port_destroy(struct net_device *dev) | |
1143 | { | |
e052f7e6 | 1144 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
f6478218 | 1145 | struct sk_buff *skb; |
b863ceb7 | 1146 | |
a35e2c1b | 1147 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 1148 | netdev_rx_handler_unregister(dev); |
fe0ca732 ED |
1149 | |
1150 | /* After this point, no packet can schedule bc_work anymore, | |
1151 | * but we need to cancel it and purge left skbs if any. | |
1152 | */ | |
1153 | cancel_work_sync(&port->bc_work); | |
f6478218 HX |
1154 | |
1155 | while ((skb = __skb_dequeue(&port->bc_queue))) { | |
1156 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
1157 | ||
1158 | if (src) | |
1159 | dev_put(src->dev); | |
1160 | ||
1161 | kfree_skb(skb); | |
1162 | } | |
fe0ca732 | 1163 | |
a1f5315c | 1164 | kfree(port); |
b863ceb7 PM |
1165 | } |
1166 | ||
b863ceb7 PM |
1167 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
1168 | { | |
1169 | if (tb[IFLA_ADDRESS]) { | |
1170 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1171 | return -EINVAL; | |
1172 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1173 | return -EADDRNOTAVAIL; | |
1174 | } | |
27c0b1a8 | 1175 | |
15127478 MT |
1176 | if (data && data[IFLA_MACVLAN_FLAGS] && |
1177 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) | |
1178 | return -EINVAL; | |
1179 | ||
27c0b1a8 AB |
1180 | if (data && data[IFLA_MACVLAN_MODE]) { |
1181 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
1182 | case MACVLAN_MODE_PRIVATE: | |
1183 | case MACVLAN_MODE_VEPA: | |
1184 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 1185 | case MACVLAN_MODE_PASSTHRU: |
79cf79ab MB |
1186 | case MACVLAN_MODE_SOURCE: |
1187 | break; | |
1188 | default: | |
1189 | return -EINVAL; | |
1190 | } | |
1191 | } | |
1192 | ||
1193 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { | |
1194 | switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { | |
1195 | case MACVLAN_MACADDR_ADD: | |
1196 | case MACVLAN_MACADDR_DEL: | |
1197 | case MACVLAN_MACADDR_FLUSH: | |
1198 | case MACVLAN_MACADDR_SET: | |
27c0b1a8 AB |
1199 | break; |
1200 | default: | |
1201 | return -EINVAL; | |
1202 | } | |
1203 | } | |
79cf79ab MB |
1204 | |
1205 | if (data && data[IFLA_MACVLAN_MACADDR]) { | |
1206 | if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) | |
1207 | return -EINVAL; | |
1208 | ||
1209 | if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) | |
1210 | return -EADDRNOTAVAIL; | |
1211 | } | |
1212 | ||
1213 | if (data && data[IFLA_MACVLAN_MACADDR_COUNT]) | |
1214 | return -EINVAL; | |
1215 | ||
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | /** | |
1220 | * reconfigure list of remote source mac address | |
1221 | * (only for macvlan devices in source mode) | |
1222 | * Note regarding alignment: all netlink data is aligned to 4 Byte, which | |
1223 | * suffices for both ether_addr_copy and ether_addr_equal_64bits usage. | |
1224 | */ | |
1225 | static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, | |
1226 | struct nlattr *data[]) | |
1227 | { | |
1228 | char *addr = NULL; | |
1229 | int ret, rem, len; | |
1230 | struct nlattr *nla, *head; | |
1231 | struct macvlan_source_entry *entry; | |
1232 | ||
1233 | if (data[IFLA_MACVLAN_MACADDR]) | |
1234 | addr = nla_data(data[IFLA_MACVLAN_MACADDR]); | |
1235 | ||
1236 | if (mode == MACVLAN_MACADDR_ADD) { | |
1237 | if (!addr) | |
1238 | return -EINVAL; | |
1239 | ||
1240 | return macvlan_hash_add_source(vlan, addr); | |
1241 | ||
1242 | } else if (mode == MACVLAN_MACADDR_DEL) { | |
1243 | if (!addr) | |
1244 | return -EINVAL; | |
1245 | ||
1246 | entry = macvlan_hash_lookup_source(vlan, addr); | |
1247 | if (entry) { | |
1248 | macvlan_hash_del_source(entry); | |
1249 | vlan->macaddr_count--; | |
1250 | } | |
1251 | } else if (mode == MACVLAN_MACADDR_FLUSH) { | |
1252 | macvlan_flush_sources(vlan->port, vlan); | |
1253 | } else if (mode == MACVLAN_MACADDR_SET) { | |
1254 | macvlan_flush_sources(vlan->port, vlan); | |
1255 | ||
1256 | if (addr) { | |
1257 | ret = macvlan_hash_add_source(vlan, addr); | |
1258 | if (ret) | |
1259 | return ret; | |
1260 | } | |
1261 | ||
1262 | if (!data || !data[IFLA_MACVLAN_MACADDR_DATA]) | |
1263 | return 0; | |
1264 | ||
1265 | head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1266 | len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1267 | ||
1268 | nla_for_each_attr(nla, head, len, rem) { | |
1269 | if (nla_type(nla) != IFLA_MACVLAN_MACADDR || | |
1270 | nla_len(nla) != ETH_ALEN) | |
1271 | continue; | |
1272 | ||
1273 | addr = nla_data(nla); | |
1274 | ret = macvlan_hash_add_source(vlan, addr); | |
1275 | if (ret) | |
1276 | return ret; | |
1277 | } | |
1278 | } else { | |
1279 | return -EINVAL; | |
1280 | } | |
1281 | ||
b863ceb7 PM |
1282 | return 0; |
1283 | } | |
1284 | ||
fc0663d6 | 1285 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
2f6a1b66 | 1286 | struct nlattr *tb[], struct nlattr *data[]) |
b863ceb7 PM |
1287 | { |
1288 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1289 | struct macvlan_port *port; | |
1290 | struct net_device *lowerdev; | |
1291 | int err; | |
79cf79ab | 1292 | int macmode; |
aa5fd0fb | 1293 | bool create = false; |
b863ceb7 PM |
1294 | |
1295 | if (!tb[IFLA_LINK]) | |
1296 | return -EINVAL; | |
1297 | ||
81adee47 | 1298 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
1299 | if (lowerdev == NULL) |
1300 | return -ENODEV; | |
1301 | ||
d70f2cf5 | 1302 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 1303 | * the real device as the lowerdev. |
a6ca5f1d | 1304 | */ |
d70f2cf5 KW |
1305 | if (netif_is_macvlan(lowerdev)) |
1306 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 1307 | |
b863ceb7 PM |
1308 | if (!tb[IFLA_MTU]) |
1309 | dev->mtu = lowerdev->mtu; | |
1310 | else if (dev->mtu > lowerdev->mtu) | |
1311 | return -EINVAL; | |
1312 | ||
91572088 JW |
1313 | /* MTU range: 68 - lowerdev->max_mtu */ |
1314 | dev->min_mtu = ETH_MIN_MTU; | |
1315 | dev->max_mtu = lowerdev->max_mtu; | |
1316 | ||
b863ceb7 | 1317 | if (!tb[IFLA_ADDRESS]) |
7ce5d222 | 1318 | eth_hw_addr_random(dev); |
b863ceb7 | 1319 | |
a35e2c1b | 1320 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
1321 | err = macvlan_port_create(lowerdev); |
1322 | if (err < 0) | |
1323 | return err; | |
aa5fd0fb | 1324 | create = true; |
b863ceb7 | 1325 | } |
e052f7e6 | 1326 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1327 | |
eb06acdc | 1328 | /* Only 1 macvlan device can be created in passthru mode */ |
aa5fd0fb GF |
1329 | if (port->passthru) { |
1330 | /* The macvlan port must be not created this time, | |
1331 | * still goto destroy_macvlan_port for readability. | |
1332 | */ | |
1333 | err = -EINVAL; | |
1334 | goto destroy_macvlan_port; | |
1335 | } | |
eb06acdc | 1336 | |
b863ceb7 PM |
1337 | vlan->lowerdev = lowerdev; |
1338 | vlan->dev = dev; | |
1339 | vlan->port = port; | |
2be5c767 | 1340 | vlan->set_features = MACVLAN_FEATURES; |
952fcfd0 | 1341 | vlan->nest_level = dev_get_nest_level(lowerdev) + 1; |
b863ceb7 | 1342 | |
27c0b1a8 AB |
1343 | vlan->mode = MACVLAN_MODE_VEPA; |
1344 | if (data && data[IFLA_MACVLAN_MODE]) | |
1345 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1346 | ||
df8ef8f3 JF |
1347 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1348 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1349 | ||
eb06acdc | 1350 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
aa5fd0fb GF |
1351 | if (port->count) { |
1352 | err = -EINVAL; | |
1353 | goto destroy_macvlan_port; | |
1354 | } | |
eb06acdc | 1355 | port->passthru = true; |
8b98604e | 1356 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1357 | } |
1358 | ||
79cf79ab | 1359 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
aa5fd0fb GF |
1360 | if (vlan->mode != MACVLAN_MODE_SOURCE) { |
1361 | err = -EINVAL; | |
1362 | goto destroy_macvlan_port; | |
1363 | } | |
79cf79ab MB |
1364 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); |
1365 | err = macvlan_changelink_sources(vlan, macmode, data); | |
1366 | if (err) | |
aa5fd0fb | 1367 | goto destroy_macvlan_port; |
79cf79ab MB |
1368 | } |
1369 | ||
47d4ab91 JF |
1370 | err = register_netdevice(dev); |
1371 | if (err < 0) | |
aa5fd0fb | 1372 | goto destroy_macvlan_port; |
47d4ab91 | 1373 | |
a6cc0cfa | 1374 | dev->priv_flags |= IFF_MACVLAN; |
7cd43db7 JP |
1375 | err = netdev_upper_dev_link(lowerdev, dev); |
1376 | if (err) | |
da37705c | 1377 | goto unregister_netdev; |
b863ceb7 | 1378 | |
233c7df0 | 1379 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1380 | netif_stacked_transfer_operstate(lowerdev, dev); |
de7d244d | 1381 | linkwatch_fire_event(dev); |
f16d3d57 | 1382 | |
b863ceb7 | 1383 | return 0; |
f16d3d57 | 1384 | |
da37705c CW |
1385 | unregister_netdev: |
1386 | unregister_netdevice(dev); | |
aa5fd0fb GF |
1387 | destroy_macvlan_port: |
1388 | if (create) | |
1389 | macvlan_port_destroy(port->dev); | |
f16d3d57 | 1390 | return err; |
b863ceb7 | 1391 | } |
fc0663d6 | 1392 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1393 | |
fc0663d6 AB |
1394 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
1395 | struct nlattr *tb[], struct nlattr *data[]) | |
1396 | { | |
2f6a1b66 | 1397 | return macvlan_common_newlink(src_net, dev, tb, data); |
fc0663d6 AB |
1398 | } |
1399 | ||
1400 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1401 | { |
1402 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1403 | |
79cf79ab MB |
1404 | if (vlan->mode == MACVLAN_MODE_SOURCE) |
1405 | macvlan_flush_sources(vlan->port, vlan); | |
233c7df0 | 1406 | list_del_rcu(&vlan->list); |
23289a37 | 1407 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1408 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1409 | } |
fc0663d6 | 1410 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1411 | |
27c0b1a8 AB |
1412 | static int macvlan_changelink(struct net_device *dev, |
1413 | struct nlattr *tb[], struct nlattr *data[]) | |
1414 | { | |
1415 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1416 | enum macvlan_mode mode; |
1417 | bool set_mode = false; | |
79cf79ab MB |
1418 | enum macvlan_macaddr_mode macmode; |
1419 | int ret; | |
266e8347 MT |
1420 | |
1421 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1422 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1423 | set_mode = true; | |
1424 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1425 | /* Passthrough mode can't be set or cleared dynamically */ | |
1426 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1427 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1428 | return -EINVAL; | |
79cf79ab MB |
1429 | if (vlan->mode == MACVLAN_MODE_SOURCE && |
1430 | vlan->mode != mode) | |
1431 | macvlan_flush_sources(vlan->port, vlan); | |
266e8347 | 1432 | } |
99ffc3e7 | 1433 | |
df8ef8f3 JF |
1434 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1435 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1436 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
99ffc3e7 MT |
1437 | if (vlan->port->passthru && promisc) { |
1438 | int err; | |
1439 | ||
1440 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1441 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1442 | else | |
1443 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1444 | if (err < 0) | |
1445 | return err; | |
1446 | } | |
df8ef8f3 JF |
1447 | vlan->flags = flags; |
1448 | } | |
266e8347 MT |
1449 | if (set_mode) |
1450 | vlan->mode = mode; | |
79cf79ab MB |
1451 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1452 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1453 | return -EINVAL; | |
1454 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1455 | ret = macvlan_changelink_sources(vlan, macmode, data); | |
1456 | if (ret) | |
1457 | return ret; | |
1458 | } | |
27c0b1a8 AB |
1459 | return 0; |
1460 | } | |
1461 | ||
79cf79ab MB |
1462 | static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan) |
1463 | { | |
1464 | if (vlan->macaddr_count == 0) | |
1465 | return 0; | |
1466 | return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */ | |
1467 | + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN); | |
1468 | } | |
1469 | ||
27c0b1a8 AB |
1470 | static size_t macvlan_get_size(const struct net_device *dev) |
1471 | { | |
79cf79ab MB |
1472 | struct macvlan_dev *vlan = netdev_priv(dev); |
1473 | ||
01fe944f ED |
1474 | return (0 |
1475 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1476 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
79cf79ab MB |
1477 | + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */ |
1478 | + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */ | |
01fe944f | 1479 | ); |
27c0b1a8 AB |
1480 | } |
1481 | ||
79cf79ab MB |
1482 | static int macvlan_fill_info_macaddr(struct sk_buff *skb, |
1483 | const struct macvlan_dev *vlan, | |
1484 | const int i) | |
1485 | { | |
1486 | struct hlist_head *h = &vlan->port->vlan_source_hash[i]; | |
1487 | struct macvlan_source_entry *entry; | |
1488 | ||
1489 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
1490 | if (entry->vlan != vlan) | |
1491 | continue; | |
1492 | if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) | |
1493 | return 1; | |
1494 | } | |
1495 | return 0; | |
1496 | } | |
1497 | ||
27c0b1a8 AB |
1498 | static int macvlan_fill_info(struct sk_buff *skb, |
1499 | const struct net_device *dev) | |
1500 | { | |
1501 | struct macvlan_dev *vlan = netdev_priv(dev); | |
79cf79ab MB |
1502 | int i; |
1503 | struct nlattr *nest; | |
27c0b1a8 | 1504 | |
ead9a76c DM |
1505 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1506 | goto nla_put_failure; | |
df8ef8f3 JF |
1507 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1508 | goto nla_put_failure; | |
79cf79ab MB |
1509 | if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count)) |
1510 | goto nla_put_failure; | |
1511 | if (vlan->macaddr_count > 0) { | |
1512 | nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA); | |
1513 | if (nest == NULL) | |
1514 | goto nla_put_failure; | |
1515 | ||
1516 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
1517 | if (macvlan_fill_info_macaddr(skb, vlan, i)) | |
1518 | goto nla_put_failure; | |
1519 | } | |
1520 | nla_nest_end(skb, nest); | |
1521 | } | |
27c0b1a8 AB |
1522 | return 0; |
1523 | ||
1524 | nla_put_failure: | |
1525 | return -EMSGSIZE; | |
1526 | } | |
1527 | ||
1528 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1529 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1530 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
79cf79ab MB |
1531 | [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, |
1532 | [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
1533 | [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, | |
1534 | [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 }, | |
27c0b1a8 AB |
1535 | }; |
1536 | ||
fc0663d6 AB |
1537 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1538 | { | |
1539 | /* common fields */ | |
fc0663d6 AB |
1540 | ops->validate = macvlan_validate; |
1541 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1542 | ops->policy = macvlan_policy; | |
1543 | ops->changelink = macvlan_changelink; | |
1544 | ops->get_size = macvlan_get_size; | |
1545 | ops->fill_info = macvlan_fill_info; | |
1546 | ||
1547 | return rtnl_link_register(ops); | |
1548 | }; | |
1549 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1550 | ||
eaca400f ND |
1551 | static struct net *macvlan_get_link_net(const struct net_device *dev) |
1552 | { | |
1553 | return dev_net(macvlan_dev_real_dev(dev)); | |
1554 | } | |
1555 | ||
fc0663d6 | 1556 | static struct rtnl_link_ops macvlan_link_ops = { |
b863ceb7 | 1557 | .kind = "macvlan", |
8a35747a | 1558 | .setup = macvlan_setup, |
b863ceb7 PM |
1559 | .newlink = macvlan_newlink, |
1560 | .dellink = macvlan_dellink, | |
eaca400f | 1561 | .get_link_net = macvlan_get_link_net, |
6fe3faf8 | 1562 | .priv_size = sizeof(struct macvlan_dev), |
b863ceb7 PM |
1563 | }; |
1564 | ||
1565 | static int macvlan_device_event(struct notifier_block *unused, | |
1566 | unsigned long event, void *ptr) | |
1567 | { | |
351638e7 | 1568 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1569 | struct macvlan_dev *vlan, *next; |
1570 | struct macvlan_port *port; | |
226bd341 | 1571 | LIST_HEAD(list_kill); |
b863ceb7 | 1572 | |
a35e2c1b | 1573 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
1574 | return NOTIFY_DONE; |
1575 | ||
e052f7e6 | 1576 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1577 | |
b863ceb7 | 1578 | switch (event) { |
de7d244d | 1579 | case NETDEV_UP: |
b863ceb7 PM |
1580 | case NETDEV_CHANGE: |
1581 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1582 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1583 | vlan->dev); | |
b863ceb7 PM |
1584 | break; |
1585 | case NETDEV_FEAT_CHANGE: | |
1586 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1587 | vlan->dev->gso_max_size = dev->gso_max_size; |
f6773c5e | 1588 | vlan->dev->gso_max_segs = dev->gso_max_segs; |
797f87f8 | 1589 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1590 | } |
1591 | break; | |
3763e7ef | 1592 | case NETDEV_CHANGEMTU: |
1593 | list_for_each_entry(vlan, &port->vlans, list) { | |
1594 | if (vlan->dev->mtu <= dev->mtu) | |
1595 | continue; | |
1596 | dev_set_mtu(vlan->dev, dev->mtu); | |
1597 | } | |
e289fd28 | 1598 | break; |
1599 | case NETDEV_CHANGEADDR: | |
1600 | if (!port->passthru) | |
1601 | return NOTIFY_DONE; | |
1602 | ||
1603 | vlan = list_first_entry_or_null(&port->vlans, | |
1604 | struct macvlan_dev, | |
1605 | list); | |
1606 | ||
1607 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1608 | return NOTIFY_BAD; | |
1609 | ||
3763e7ef | 1610 | break; |
b863ceb7 | 1611 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1612 | /* twiddle thumbs on netns device moves */ |
1613 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1614 | break; | |
1615 | ||
b863ceb7 | 1616 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1617 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1618 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1619 | break; |
1c01fe14 JP |
1620 | case NETDEV_PRE_TYPE_CHANGE: |
1621 | /* Forbid underlaying device to change its type. */ | |
1622 | return NOTIFY_BAD; | |
4c991255 VY |
1623 | |
1624 | case NETDEV_NOTIFY_PEERS: | |
1625 | case NETDEV_BONDING_FAILOVER: | |
1626 | case NETDEV_RESEND_IGMP: | |
1627 | /* Propagate to all vlans */ | |
1628 | list_for_each_entry(vlan, &port->vlans, list) | |
1629 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1630 | } |
1631 | return NOTIFY_DONE; | |
1632 | } | |
1633 | ||
1634 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1635 | .notifier_call = macvlan_device_event, | |
1636 | }; | |
1637 | ||
1638 | static int __init macvlan_init_module(void) | |
1639 | { | |
1640 | int err; | |
1641 | ||
1642 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1643 | |
fc0663d6 | 1644 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1645 | if (err < 0) |
1646 | goto err1; | |
1647 | return 0; | |
1648 | err1: | |
b863ceb7 PM |
1649 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1650 | return err; | |
1651 | } | |
1652 | ||
1653 | static void __exit macvlan_cleanup_module(void) | |
1654 | { | |
1655 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1656 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1657 | } | |
1658 | ||
1659 | module_init(macvlan_init_module); | |
1660 | module_exit(macvlan_cleanup_module); | |
1661 | ||
1662 | MODULE_LICENSE("GPL"); | |
1663 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1664 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1665 | MODULE_ALIAS_RTNL_LINK("macvlan"); |