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Commit | Line | Data |
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b863ceb7 PM |
1 | /* |
2 | * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License as | |
6 | * published by the Free Software Foundation; either version 2 of | |
7 | * the License, or (at your option) any later version. | |
8 | * | |
9 | * The code this is based on carried the following copyright notice: | |
10 | * --- | |
11 | * (C) Copyright 2001-2006 | |
12 | * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com | |
13 | * Re-worked by Ben Greear <greearb@candelatech.com> | |
14 | * --- | |
15 | */ | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/string.h> | |
82524746 | 23 | #include <linux/rculist.h> |
b863ceb7 PM |
24 | #include <linux/notifier.h> |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/ethtool.h> | |
28 | #include <linux/if_arp.h> | |
87002b03 | 29 | #include <linux/if_vlan.h> |
b863ceb7 PM |
30 | #include <linux/if_link.h> |
31 | #include <linux/if_macvlan.h> | |
cd431e73 | 32 | #include <linux/hash.h> |
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 | 41 | |
43c2d578 | 42 | #define MACVLAN_F_PASSTHRU 1 |
18c8c54d | 43 | #define MACVLAN_F_ADDRCHANGE 2 |
43c2d578 | 44 | |
b863ceb7 PM |
45 | struct macvlan_port { |
46 | struct net_device *dev; | |
47 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
48 | struct list_head vlans; | |
412ca155 HX |
49 | struct sk_buff_head bc_queue; |
50 | struct work_struct bc_work; | |
43c2d578 | 51 | u32 flags; |
5e3c516b | 52 | int count; |
79cf79ab | 53 | struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; |
9c127a01 | 54 | DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); |
18c8c54d | 55 | unsigned char perm_addr[ETH_ALEN]; |
79cf79ab MB |
56 | }; |
57 | ||
58 | struct macvlan_source_entry { | |
59 | struct hlist_node hlist; | |
60 | struct macvlan_dev *vlan; | |
61 | unsigned char addr[6+2] __aligned(sizeof(u16)); | |
62 | struct rcu_head rcu; | |
b863ceb7 PM |
63 | }; |
64 | ||
412ca155 HX |
65 | struct macvlan_skb_cb { |
66 | const struct macvlan_dev *src; | |
67 | }; | |
68 | ||
69 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
70 | ||
d5cd9244 EB |
71 | static void macvlan_port_destroy(struct net_device *dev); |
72 | ||
43c2d578 VY |
73 | static inline bool macvlan_passthru(const struct macvlan_port *port) |
74 | { | |
75 | return port->flags & MACVLAN_F_PASSTHRU; | |
76 | } | |
77 | ||
78 | static inline void macvlan_set_passthru(struct macvlan_port *port) | |
79 | { | |
80 | port->flags |= MACVLAN_F_PASSTHRU; | |
81 | } | |
82 | ||
18c8c54d VY |
83 | static inline bool macvlan_addr_change(const struct macvlan_port *port) |
84 | { | |
85 | return port->flags & MACVLAN_F_ADDRCHANGE; | |
86 | } | |
87 | ||
88 | static inline void macvlan_set_addr_change(struct macvlan_port *port) | |
89 | { | |
90 | port->flags |= MACVLAN_F_ADDRCHANGE; | |
91 | } | |
92 | ||
93 | static inline void macvlan_clear_addr_change(struct macvlan_port *port) | |
94 | { | |
95 | port->flags &= ~MACVLAN_F_ADDRCHANGE; | |
96 | } | |
97 | ||
79cf79ab MB |
98 | /* Hash Ethernet address */ |
99 | static u32 macvlan_eth_hash(const unsigned char *addr) | |
100 | { | |
101 | u64 value = get_unaligned((u64 *)addr); | |
102 | ||
103 | /* only want 6 bytes */ | |
104 | #ifdef __BIG_ENDIAN | |
105 | value >>= 16; | |
106 | #else | |
107 | value <<= 16; | |
108 | #endif | |
109 | return hash_64(value, MACVLAN_HASH_BITS); | |
110 | } | |
111 | ||
e052f7e6 ED |
112 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
113 | { | |
114 | return rcu_dereference(dev->rx_handler_data); | |
115 | } | |
116 | ||
117 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
118 | { | |
119 | return rtnl_dereference(dev->rx_handler_data); | |
120 | } | |
121 | ||
a35e2c1b JP |
122 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
123 | ||
b863ceb7 PM |
124 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
125 | const unsigned char *addr) | |
126 | { | |
127 | struct macvlan_dev *vlan; | |
79cf79ab | 128 | u32 idx = macvlan_eth_hash(addr); |
b863ceb7 | 129 | |
79cf79ab | 130 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) { |
a6700db1 | 131 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
132 | return vlan; |
133 | } | |
134 | return NULL; | |
135 | } | |
136 | ||
79cf79ab MB |
137 | static struct macvlan_source_entry *macvlan_hash_lookup_source( |
138 | const struct macvlan_dev *vlan, | |
139 | const unsigned char *addr) | |
140 | { | |
141 | struct macvlan_source_entry *entry; | |
142 | u32 idx = macvlan_eth_hash(addr); | |
143 | struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; | |
144 | ||
145 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
146 | if (ether_addr_equal_64bits(entry->addr, addr) && | |
147 | entry->vlan == vlan) | |
148 | return entry; | |
149 | } | |
150 | return NULL; | |
151 | } | |
152 | ||
153 | static int macvlan_hash_add_source(struct macvlan_dev *vlan, | |
154 | const unsigned char *addr) | |
155 | { | |
156 | struct macvlan_port *port = vlan->port; | |
157 | struct macvlan_source_entry *entry; | |
158 | struct hlist_head *h; | |
159 | ||
160 | entry = macvlan_hash_lookup_source(vlan, addr); | |
161 | if (entry) | |
162 | return 0; | |
163 | ||
164 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
165 | if (!entry) | |
166 | return -ENOMEM; | |
167 | ||
168 | ether_addr_copy(entry->addr, addr); | |
169 | entry->vlan = vlan; | |
170 | h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; | |
171 | hlist_add_head_rcu(&entry->hlist, h); | |
172 | vlan->macaddr_count++; | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
f9ac30f0 EB |
177 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
178 | { | |
179 | struct macvlan_port *port = vlan->port; | |
180 | const unsigned char *addr = vlan->dev->dev_addr; | |
79cf79ab | 181 | u32 idx = macvlan_eth_hash(addr); |
f9ac30f0 | 182 | |
79cf79ab MB |
183 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); |
184 | } | |
185 | ||
186 | static void macvlan_hash_del_source(struct macvlan_source_entry *entry) | |
187 | { | |
188 | hlist_del_rcu(&entry->hlist); | |
189 | kfree_rcu(entry, rcu); | |
f9ac30f0 EB |
190 | } |
191 | ||
449f4544 | 192 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
193 | { |
194 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
195 | if (sync) |
196 | synchronize_rcu(); | |
f9ac30f0 EB |
197 | } |
198 | ||
199 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
200 | const unsigned char *addr) | |
201 | { | |
449f4544 | 202 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
203 | /* Now that we are unhashed it is safe to change the device |
204 | * address without confusing packet delivery. | |
205 | */ | |
206 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
207 | macvlan_hash_add(vlan); | |
208 | } | |
209 | ||
d94d0254 GF |
210 | static bool macvlan_addr_busy(const struct macvlan_port *port, |
211 | const unsigned char *addr) | |
f9ac30f0 | 212 | { |
18c8c54d | 213 | /* Test to see if the specified address is |
f9ac30f0 EB |
214 | * currently in use by the underlying device or |
215 | * another macvlan. | |
216 | */ | |
18c8c54d | 217 | if (!macvlan_passthru(port) && !macvlan_addr_change(port) && |
e696cda7 | 218 | ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
d94d0254 | 219 | return true; |
f9ac30f0 EB |
220 | |
221 | if (macvlan_hash_lookup(port, addr)) | |
d94d0254 | 222 | return true; |
f9ac30f0 | 223 | |
d94d0254 | 224 | return false; |
f9ac30f0 EB |
225 | } |
226 | ||
a1e514c5 | 227 | |
fc0663d6 AB |
228 | static int macvlan_broadcast_one(struct sk_buff *skb, |
229 | const struct macvlan_dev *vlan, | |
618e1b74 | 230 | const struct ethhdr *eth, bool local) |
a1e514c5 | 231 | { |
fc0663d6 | 232 | struct net_device *dev = vlan->dev; |
a1e514c5 | 233 | |
618e1b74 | 234 | if (local) |
412ca155 | 235 | return __dev_forward_skb(dev, skb); |
618e1b74 | 236 | |
a1e514c5 | 237 | skb->dev = dev; |
a6700db1 | 238 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
239 | skb->pkt_type = PACKET_BROADCAST; |
240 | else | |
241 | skb->pkt_type = PACKET_MULTICAST; | |
242 | ||
412ca155 | 243 | return 0; |
a1e514c5 AB |
244 | } |
245 | ||
3807ff58 ED |
246 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
247 | { | |
248 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
249 | } | |
250 | ||
251 | ||
252 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
253 | const unsigned char *addr) | |
cd431e73 ED |
254 | { |
255 | u32 val = __get_unaligned_cpu32(addr + 2); | |
256 | ||
3807ff58 | 257 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
258 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
259 | } | |
260 | ||
b863ceb7 | 261 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
262 | const struct macvlan_port *port, |
263 | struct net_device *src, | |
264 | enum macvlan_mode mode) | |
b863ceb7 PM |
265 | { |
266 | const struct ethhdr *eth = eth_hdr(skb); | |
267 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
268 | struct sk_buff *nskb; |
269 | unsigned int i; | |
a1e514c5 | 270 | int err; |
3807ff58 | 271 | unsigned int hash; |
b863ceb7 | 272 | |
efbbced3 PM |
273 | if (skb->protocol == htons(ETH_P_PAUSE)) |
274 | return; | |
275 | ||
b863ceb7 | 276 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 277 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
278 | if (vlan->dev == src || !(vlan->mode & mode)) |
279 | continue; | |
280 | ||
3807ff58 | 281 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
282 | if (!test_bit(hash, vlan->mc_filter)) |
283 | continue; | |
de9e8f3f HX |
284 | |
285 | err = NET_RX_DROP; | |
b863ceb7 | 286 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
287 | if (likely(nskb)) |
288 | err = macvlan_broadcast_one( | |
289 | nskb, vlan, eth, | |
412ca155 HX |
290 | mode == MACVLAN_MODE_BRIDGE) ?: |
291 | netif_rx_ni(nskb); | |
a1e514c5 | 292 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
4c979935 | 293 | err == NET_RX_SUCCESS, true); |
b863ceb7 PM |
294 | } |
295 | } | |
296 | } | |
297 | ||
412ca155 | 298 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 299 | { |
412ca155 HX |
300 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
301 | bc_work); | |
302 | struct sk_buff *skb; | |
303 | struct sk_buff_head list; | |
304 | ||
fe0ca732 | 305 | __skb_queue_head_init(&list); |
412ca155 HX |
306 | |
307 | spin_lock_bh(&port->bc_queue.lock); | |
308 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
309 | spin_unlock_bh(&port->bc_queue.lock); | |
310 | ||
311 | while ((skb = __skb_dequeue(&list))) { | |
312 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
313 | ||
314 | rcu_read_lock(); | |
b863ceb7 | 315 | |
618e1b74 AB |
316 | if (!src) |
317 | /* frame comes from an external address */ | |
318 | macvlan_broadcast(skb, port, NULL, | |
319 | MACVLAN_MODE_PRIVATE | | |
320 | MACVLAN_MODE_VEPA | | |
eb06acdc | 321 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
322 | MACVLAN_MODE_BRIDGE); |
323 | else if (src->mode == MACVLAN_MODE_VEPA) | |
324 | /* flood to everyone except source */ | |
325 | macvlan_broadcast(skb, port, src->dev, | |
326 | MACVLAN_MODE_VEPA | | |
327 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 328 | else |
618e1b74 AB |
329 | /* |
330 | * flood only to VEPA ports, bridge ports | |
331 | * already saw the frame on the way out. | |
332 | */ | |
333 | macvlan_broadcast(skb, port, src->dev, | |
334 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
335 | |
336 | rcu_read_unlock(); | |
337 | ||
260916df HX |
338 | if (src) |
339 | dev_put(src->dev); | |
412ca155 HX |
340 | kfree_skb(skb); |
341 | } | |
342 | } | |
343 | ||
344 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
260916df | 345 | const struct macvlan_dev *src, |
412ca155 HX |
346 | struct sk_buff *skb) |
347 | { | |
e676f197 | 348 | struct sk_buff *nskb; |
412ca155 HX |
349 | int err = -ENOMEM; |
350 | ||
e676f197 HX |
351 | nskb = skb_clone(skb, GFP_ATOMIC); |
352 | if (!nskb) | |
412ca155 HX |
353 | goto err; |
354 | ||
260916df HX |
355 | MACVLAN_SKB_CB(nskb)->src = src; |
356 | ||
412ca155 | 357 | spin_lock(&port->bc_queue.lock); |
07d92d5c | 358 | if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { |
260916df HX |
359 | if (src) |
360 | dev_hold(src->dev); | |
e676f197 | 361 | __skb_queue_tail(&port->bc_queue, nskb); |
412ca155 HX |
362 | err = 0; |
363 | } | |
364 | spin_unlock(&port->bc_queue.lock); | |
365 | ||
366 | if (err) | |
e676f197 | 367 | goto free_nskb; |
412ca155 HX |
368 | |
369 | schedule_work(&port->bc_work); | |
370 | return; | |
371 | ||
e676f197 HX |
372 | free_nskb: |
373 | kfree_skb(nskb); | |
412ca155 HX |
374 | err: |
375 | atomic_long_inc(&skb->dev->rx_dropped); | |
376 | } | |
377 | ||
79cf79ab MB |
378 | static void macvlan_flush_sources(struct macvlan_port *port, |
379 | struct macvlan_dev *vlan) | |
380 | { | |
381 | int i; | |
382 | ||
383 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
384 | struct hlist_node *h, *n; | |
385 | ||
386 | hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { | |
387 | struct macvlan_source_entry *entry; | |
388 | ||
389 | entry = hlist_entry(h, struct macvlan_source_entry, | |
390 | hlist); | |
391 | if (entry->vlan == vlan) | |
392 | macvlan_hash_del_source(entry); | |
393 | } | |
394 | } | |
395 | vlan->macaddr_count = 0; | |
396 | } | |
397 | ||
398 | static void macvlan_forward_source_one(struct sk_buff *skb, | |
399 | struct macvlan_dev *vlan) | |
400 | { | |
401 | struct sk_buff *nskb; | |
402 | struct net_device *dev; | |
403 | int len; | |
404 | int ret; | |
405 | ||
406 | dev = vlan->dev; | |
407 | if (unlikely(!(dev->flags & IFF_UP))) | |
408 | return; | |
409 | ||
410 | nskb = skb_clone(skb, GFP_ATOMIC); | |
411 | if (!nskb) | |
412 | return; | |
413 | ||
414 | len = nskb->len + ETH_HLEN; | |
415 | nskb->dev = dev; | |
c8c41ea1 AD |
416 | |
417 | if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, dev->dev_addr)) | |
418 | nskb->pkt_type = PACKET_HOST; | |
79cf79ab MB |
419 | |
420 | ret = netif_rx(nskb); | |
4c979935 | 421 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
79cf79ab MB |
422 | } |
423 | ||
424 | static void macvlan_forward_source(struct sk_buff *skb, | |
425 | struct macvlan_port *port, | |
426 | const unsigned char *addr) | |
427 | { | |
428 | struct macvlan_source_entry *entry; | |
429 | u32 idx = macvlan_eth_hash(addr); | |
430 | struct hlist_head *h = &port->vlan_source_hash[idx]; | |
431 | ||
432 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
433 | if (ether_addr_equal_64bits(entry->addr, addr)) | |
fc51f2b7 | 434 | macvlan_forward_source_one(skb, entry->vlan); |
79cf79ab MB |
435 | } |
436 | } | |
437 | ||
412ca155 HX |
438 | /* called under rcu_read_lock() from netif_receive_skb */ |
439 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
440 | { | |
441 | struct macvlan_port *port; | |
442 | struct sk_buff *skb = *pskb; | |
443 | const struct ethhdr *eth = eth_hdr(skb); | |
444 | const struct macvlan_dev *vlan; | |
445 | const struct macvlan_dev *src; | |
446 | struct net_device *dev; | |
447 | unsigned int len = 0; | |
d1dd9119 | 448 | int ret; |
449 | rx_handler_result_t handle_res; | |
412ca155 HX |
450 | |
451 | port = macvlan_port_get_rcu(skb->dev); | |
452 | if (is_multicast_ether_addr(eth->h_dest)) { | |
9c127a01 HX |
453 | unsigned int hash; |
454 | ||
19bcf9f2 | 455 | skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN); |
412ca155 HX |
456 | if (!skb) |
457 | return RX_HANDLER_CONSUMED; | |
e639b8d8 | 458 | *pskb = skb; |
412ca155 | 459 | eth = eth_hdr(skb); |
79cf79ab | 460 | macvlan_forward_source(skb, port, eth->h_source); |
412ca155 HX |
461 | src = macvlan_hash_lookup(port, eth->h_source); |
462 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
463 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 464 | /* forward to original port. */ |
465 | vlan = src; | |
412ca155 HX |
466 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
467 | netif_rx(skb); | |
d1dd9119 | 468 | handle_res = RX_HANDLER_CONSUMED; |
729e72a1 | 469 | goto out; |
470 | } | |
471 | ||
9c127a01 HX |
472 | hash = mc_hash(NULL, eth->h_dest); |
473 | if (test_bit(hash, port->mc_filter)) | |
474 | macvlan_broadcast_enqueue(port, src, skb); | |
412ca155 | 475 | |
8a4eb573 | 476 | return RX_HANDLER_PASS; |
b863ceb7 PM |
477 | } |
478 | ||
79cf79ab | 479 | macvlan_forward_source(skb, port, eth->h_source); |
43c2d578 | 480 | if (macvlan_passthru(port)) |
233c7df0 JP |
481 | vlan = list_first_or_null_rcu(&port->vlans, |
482 | struct macvlan_dev, list); | |
eb06acdc SS |
483 | else |
484 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
dd6b9c2c | 485 | if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE) |
8a4eb573 | 486 | return RX_HANDLER_PASS; |
b863ceb7 PM |
487 | |
488 | dev = vlan->dev; | |
489 | if (unlikely(!(dev->flags & IFF_UP))) { | |
490 | kfree_skb(skb); | |
8a4eb573 | 491 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 492 | } |
a1e514c5 | 493 | len = skb->len + ETH_HLEN; |
b863ceb7 | 494 | skb = skb_share_check(skb, GFP_ATOMIC); |
d1dd9119 | 495 | if (!skb) { |
496 | ret = NET_RX_DROP; | |
497 | handle_res = RX_HANDLER_CONSUMED; | |
ba01877f | 498 | goto out; |
d1dd9119 | 499 | } |
b863ceb7 | 500 | |
e639b8d8 | 501 | *pskb = skb; |
b863ceb7 PM |
502 | skb->dev = dev; |
503 | skb->pkt_type = PACKET_HOST; | |
504 | ||
d1dd9119 | 505 | ret = NET_RX_SUCCESS; |
506 | handle_res = RX_HANDLER_ANOTHER; | |
ba01877f | 507 | out: |
4c979935 | 508 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
d1dd9119 | 509 | return handle_res; |
b863ceb7 PM |
510 | } |
511 | ||
618e1b74 AB |
512 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
513 | { | |
514 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
515 | const struct macvlan_port *port = vlan->port; | |
516 | const struct macvlan_dev *dest; | |
517 | ||
518 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
519 | const struct ethhdr *eth = (void *)skb->data; | |
520 | ||
521 | /* send to other bridge ports directly */ | |
522 | if (is_multicast_ether_addr(eth->h_dest)) { | |
523 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
524 | goto xmit_world; | |
525 | } | |
526 | ||
527 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
528 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 529 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 530 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
531 | |
532 | return NET_XMIT_SUCCESS; | |
533 | } | |
534 | } | |
535 | ||
536 | xmit_world: | |
59b9997b | 537 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
538 | return dev_queue_xmit(skb); |
539 | } | |
540 | ||
688cea83 | 541 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
542 | { | |
543 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
544 | if (vlan->netpoll) | |
545 | netpoll_send_skb(vlan->netpoll, skb); | |
546 | #else | |
547 | BUG(); | |
548 | #endif | |
549 | return NETDEV_TX_OK; | |
550 | } | |
551 | ||
0db901bd | 552 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
553 | struct net_device *dev) | |
b863ceb7 | 554 | { |
b863ceb7 PM |
555 | unsigned int len = skb->len; |
556 | int ret; | |
688cea83 | 557 | struct macvlan_dev *vlan = netdev_priv(dev); |
558 | ||
559 | if (unlikely(netpoll_tx_running(dev))) | |
560 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 561 | |
a6cc0cfa JF |
562 | if (vlan->fwd_priv) { |
563 | skb->dev = vlan->lowerdev; | |
f663dd9a | 564 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
a6cc0cfa JF |
565 | } else { |
566 | ret = macvlan_queue_xmit(skb, dev); | |
567 | } | |
568 | ||
2d6c9ffc | 569 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 570 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 571 | |
8ffab51b ED |
572 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
573 | u64_stats_update_begin(&pcpu_stats->syncp); | |
574 | pcpu_stats->tx_packets++; | |
575 | pcpu_stats->tx_bytes += len; | |
576 | u64_stats_update_end(&pcpu_stats->syncp); | |
577 | } else { | |
578 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
579 | } | |
cbbef5e1 | 580 | return ret; |
b863ceb7 PM |
581 | } |
582 | ||
583 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
584 | unsigned short type, const void *daddr, |
585 | const void *saddr, unsigned len) | |
b863ceb7 PM |
586 | { |
587 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
588 | struct net_device *lowerdev = vlan->lowerdev; | |
589 | ||
0c4e8581 SH |
590 | return dev_hard_header(skb, lowerdev, type, daddr, |
591 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
592 | } |
593 | ||
3b04ddde SH |
594 | static const struct header_ops macvlan_hard_header_ops = { |
595 | .create = macvlan_hard_header, | |
3b04ddde | 596 | .parse = eth_header_parse, |
3b04ddde SH |
597 | .cache = eth_header_cache, |
598 | .cache_update = eth_header_cache_update, | |
599 | }; | |
600 | ||
b863ceb7 PM |
601 | static int macvlan_open(struct net_device *dev) |
602 | { | |
603 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
604 | struct net_device *lowerdev = vlan->lowerdev; |
605 | int err; | |
606 | ||
43c2d578 | 607 | if (macvlan_passthru(vlan->port)) { |
78738141 MT |
608 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
609 | err = dev_set_promiscuity(lowerdev, 1); | |
610 | if (err < 0) | |
611 | goto out; | |
612 | } | |
eb06acdc SS |
613 | goto hash_add; |
614 | } | |
615 | ||
56fd2b2c | 616 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) { |
a6cc0cfa JF |
617 | vlan->fwd_priv = |
618 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); | |
619 | ||
620 | /* If we get a NULL pointer back, or if we get an error | |
621 | * then we should just fall through to the non accelerated path | |
622 | */ | |
623 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { | |
624 | vlan->fwd_priv = NULL; | |
f663dd9a | 625 | } else |
a6cc0cfa | 626 | return 0; |
a6cc0cfa JF |
627 | } |
628 | ||
580311e3 | 629 | err = -EADDRINUSE; |
f9ac30f0 EB |
630 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
631 | goto out; | |
632 | ||
a748ee24 | 633 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 634 | if (err < 0) |
b89fb7da WC |
635 | goto out; |
636 | if (dev->flags & IFF_ALLMULTI) { | |
637 | err = dev_set_allmulti(lowerdev, 1); | |
638 | if (err < 0) | |
639 | goto del_unicast; | |
640 | } | |
eb06acdc | 641 | |
efdbd2b3 VY |
642 | if (dev->flags & IFF_PROMISC) { |
643 | err = dev_set_promiscuity(lowerdev, 1); | |
644 | if (err < 0) | |
645 | goto clear_multi; | |
646 | } | |
647 | ||
eb06acdc | 648 | hash_add: |
f9ac30f0 | 649 | macvlan_hash_add(vlan); |
b863ceb7 | 650 | return 0; |
b89fb7da | 651 | |
efdbd2b3 | 652 | clear_multi: |
c3891fa2 GF |
653 | if (dev->flags & IFF_ALLMULTI) |
654 | dev_set_allmulti(lowerdev, -1); | |
b89fb7da | 655 | del_unicast: |
a748ee24 | 656 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da | 657 | out: |
a6cc0cfa JF |
658 | if (vlan->fwd_priv) { |
659 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
660 | vlan->fwd_priv); | |
661 | vlan->fwd_priv = NULL; | |
662 | } | |
b89fb7da | 663 | return err; |
b863ceb7 PM |
664 | } |
665 | ||
666 | static int macvlan_stop(struct net_device *dev) | |
667 | { | |
668 | struct macvlan_dev *vlan = netdev_priv(dev); | |
669 | struct net_device *lowerdev = vlan->lowerdev; | |
670 | ||
a6cc0cfa JF |
671 | if (vlan->fwd_priv) { |
672 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
673 | vlan->fwd_priv); | |
674 | vlan->fwd_priv = NULL; | |
675 | return 0; | |
676 | } | |
677 | ||
df8ef8f3 JF |
678 | dev_uc_unsync(lowerdev, dev); |
679 | dev_mc_unsync(lowerdev, dev); | |
680 | ||
43c2d578 | 681 | if (macvlan_passthru(vlan->port)) { |
df8ef8f3 JF |
682 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
683 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
684 | goto hash_del; |
685 | } | |
686 | ||
b863ceb7 PM |
687 | if (dev->flags & IFF_ALLMULTI) |
688 | dev_set_allmulti(lowerdev, -1); | |
689 | ||
efdbd2b3 VY |
690 | if (dev->flags & IFF_PROMISC) |
691 | dev_set_promiscuity(lowerdev, -1); | |
692 | ||
a748ee24 | 693 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 694 | |
eb06acdc | 695 | hash_del: |
449f4544 | 696 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
697 | return 0; |
698 | } | |
699 | ||
e289fd28 | 700 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
701 | { |
702 | struct macvlan_dev *vlan = netdev_priv(dev); | |
703 | struct net_device *lowerdev = vlan->lowerdev; | |
18c8c54d | 704 | struct macvlan_port *port = vlan->port; |
ad5d20a6 PM |
705 | int err; |
706 | ||
f9ac30f0 EB |
707 | if (!(dev->flags & IFF_UP)) { |
708 | /* Just copy in the new address */ | |
e289fd28 | 709 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
710 | } else { |
711 | /* Rehash and update the device filters */ | |
e289fd28 | 712 | if (macvlan_addr_busy(vlan->port, addr)) |
580311e3 | 713 | return -EADDRINUSE; |
ad5d20a6 | 714 | |
18c8c54d | 715 | if (!macvlan_passthru(port)) { |
e289fd28 | 716 | err = dev_uc_add(lowerdev, addr); |
717 | if (err) | |
718 | return err; | |
ad5d20a6 | 719 | |
e289fd28 | 720 | dev_uc_del(lowerdev, dev->dev_addr); |
721 | } | |
f9ac30f0 | 722 | |
e289fd28 | 723 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 724 | } |
18c8c54d VY |
725 | if (macvlan_passthru(port) && !macvlan_addr_change(port)) { |
726 | /* Since addr_change isn't set, we are here due to lower | |
727 | * device change. Save the lower-dev address so we can | |
728 | * restore it later. | |
729 | */ | |
730 | ether_addr_copy(vlan->port->perm_addr, | |
731 | lowerdev->dev_addr); | |
732 | } | |
733 | macvlan_clear_addr_change(port); | |
ad5d20a6 PM |
734 | return 0; |
735 | } | |
736 | ||
e289fd28 | 737 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
738 | { | |
739 | struct macvlan_dev *vlan = netdev_priv(dev); | |
740 | struct sockaddr *addr = p; | |
741 | ||
742 | if (!is_valid_ether_addr(addr->sa_data)) | |
743 | return -EADDRNOTAVAIL; | |
744 | ||
e26f43fa VY |
745 | /* If the addresses are the same, this is a no-op */ |
746 | if (ether_addr_equal(dev->dev_addr, addr->sa_data)) | |
747 | return 0; | |
748 | ||
e289fd28 | 749 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
18c8c54d | 750 | macvlan_set_addr_change(vlan->port); |
a88e2676 | 751 | return dev_set_mac_address(vlan->lowerdev, addr); |
e289fd28 | 752 | } |
753 | ||
580311e3 MC |
754 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
755 | return -EADDRINUSE; | |
756 | ||
e289fd28 | 757 | return macvlan_sync_address(dev, addr->sa_data); |
758 | } | |
759 | ||
b863ceb7 PM |
760 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
761 | { | |
762 | struct macvlan_dev *vlan = netdev_priv(dev); | |
763 | struct net_device *lowerdev = vlan->lowerdev; | |
764 | ||
bbeb0ead PC |
765 | if (dev->flags & IFF_UP) { |
766 | if (change & IFF_ALLMULTI) | |
767 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
efdbd2b3 VY |
768 | if (change & IFF_PROMISC) |
769 | dev_set_promiscuity(lowerdev, | |
770 | dev->flags & IFF_PROMISC ? 1 : -1); | |
771 | ||
bbeb0ead | 772 | } |
b863ceb7 PM |
773 | } |
774 | ||
9c127a01 HX |
775 | static void macvlan_compute_filter(unsigned long *mc_filter, |
776 | struct net_device *dev, | |
777 | struct macvlan_dev *vlan) | |
b863ceb7 | 778 | { |
cd431e73 | 779 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
9c127a01 | 780 | bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 ED |
781 | } else { |
782 | struct netdev_hw_addr *ha; | |
783 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
784 | ||
785 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
786 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 787 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 788 | } |
d5270430 | 789 | |
3807ff58 | 790 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 791 | |
9c127a01 | 792 | bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 | 793 | } |
9c127a01 HX |
794 | } |
795 | ||
796 | static void macvlan_set_mac_lists(struct net_device *dev) | |
797 | { | |
798 | struct macvlan_dev *vlan = netdev_priv(dev); | |
799 | ||
800 | macvlan_compute_filter(vlan->mc_filter, dev, vlan); | |
801 | ||
df8ef8f3 | 802 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 | 803 | dev_mc_sync(vlan->lowerdev, dev); |
9c127a01 HX |
804 | |
805 | /* This is slightly inaccurate as we're including the subscription | |
806 | * list of vlan->lowerdev too. | |
807 | * | |
808 | * Bug alert: This only works if everyone has the same broadcast | |
809 | * address as lowerdev. As soon as someone changes theirs this | |
810 | * will break. | |
811 | * | |
812 | * However, this is already broken as when you change your broadcast | |
813 | * address we don't get called. | |
814 | * | |
815 | * The solution is to maintain a list of broadcast addresses like | |
816 | * we do for uc/mc, if you care. | |
817 | */ | |
818 | macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL); | |
b863ceb7 PM |
819 | } |
820 | ||
821 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
822 | { | |
823 | struct macvlan_dev *vlan = netdev_priv(dev); | |
824 | ||
91572088 | 825 | if (vlan->lowerdev->mtu < new_mtu) |
b863ceb7 PM |
826 | return -EINVAL; |
827 | dev->mtu = new_mtu; | |
828 | return 0; | |
829 | } | |
830 | ||
831 | /* | |
832 | * macvlan network devices have devices nesting below it and are a special | |
833 | * "super class" of normal network devices; split their locks off into a | |
834 | * separate class since they always nest. | |
835 | */ | |
cf508b12 | 836 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 837 | |
70957eae VY |
838 | #define ALWAYS_ON_OFFLOADS \ |
839 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \ | |
f21e5077 | 840 | NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL) |
8b4703e9 | 841 | |
70957eae VY |
842 | #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX) |
843 | ||
b863ceb7 | 844 | #define MACVLAN_FEATURES \ |
a188222b | 845 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
fb652fdf | 846 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \ |
8d13e670 | 847 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 848 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
849 | |
850 | #define MACVLAN_STATE_MASK \ | |
851 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
852 | ||
c674ac30 VY |
853 | static int macvlan_get_nest_level(struct net_device *dev) |
854 | { | |
855 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
856 | } | |
857 | ||
c773e847 DM |
858 | static void macvlan_set_lockdep_class(struct net_device *dev) |
859 | { | |
24ffd752 | 860 | netdev_lockdep_set_classes(dev); |
c674ac30 VY |
861 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
862 | &macvlan_netdev_addr_lock_key, | |
863 | macvlan_get_nest_level(dev)); | |
c773e847 DM |
864 | } |
865 | ||
b863ceb7 PM |
866 | static int macvlan_init(struct net_device *dev) |
867 | { | |
868 | struct macvlan_dev *vlan = netdev_priv(dev); | |
869 | const struct net_device *lowerdev = vlan->lowerdev; | |
30837960 | 870 | struct macvlan_port *port = vlan->port; |
b863ceb7 PM |
871 | |
872 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
873 | (lowerdev->state & MACVLAN_STATE_MASK); | |
874 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 875 | dev->features |= ALWAYS_ON_FEATURES; |
62dbe830 | 876 | dev->hw_features |= NETIF_F_LRO; |
081e83a7 | 877 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
70957eae | 878 | dev->vlan_features |= ALWAYS_ON_OFFLOADS; |
f21e5077 | 879 | dev->hw_enc_features |= dev->features; |
8c2acc53 | 880 | dev->gso_max_size = lowerdev->gso_max_size; |
f6773c5e | 881 | dev->gso_max_segs = lowerdev->gso_max_segs; |
ef5c8996 | 882 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 883 | |
c773e847 DM |
884 | macvlan_set_lockdep_class(dev); |
885 | ||
1c213bd2 | 886 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 887 | if (!vlan->pcpu_stats) |
fccaf710 ED |
888 | return -ENOMEM; |
889 | ||
30837960 FR |
890 | port->count += 1; |
891 | ||
b863ceb7 PM |
892 | return 0; |
893 | } | |
894 | ||
fccaf710 ED |
895 | static void macvlan_uninit(struct net_device *dev) |
896 | { | |
897 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 898 | struct macvlan_port *port = vlan->port; |
fccaf710 | 899 | |
8ffab51b | 900 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 901 | |
79cf79ab | 902 | macvlan_flush_sources(port, vlan); |
5e3c516b DM |
903 | port->count -= 1; |
904 | if (!port->count) | |
d5cd9244 | 905 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
906 | } |
907 | ||
bc1f4470 | 908 | static void macvlan_dev_get_stats64(struct net_device *dev, |
909 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 910 | { |
fccaf710 ED |
911 | struct macvlan_dev *vlan = netdev_priv(dev); |
912 | ||
8ffab51b | 913 | if (vlan->pcpu_stats) { |
cdf3e274 | 914 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
915 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
916 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 917 | unsigned int start; |
fccaf710 ED |
918 | int i; |
919 | ||
920 | for_each_possible_cpu(i) { | |
8ffab51b | 921 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 922 | do { |
57a7744e | 923 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
924 | rx_packets = p->rx_packets; |
925 | rx_bytes = p->rx_bytes; | |
926 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
927 | tx_packets = p->tx_packets; |
928 | tx_bytes = p->tx_bytes; | |
57a7744e | 929 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
930 | |
931 | stats->rx_packets += rx_packets; | |
932 | stats->rx_bytes += rx_bytes; | |
933 | stats->multicast += rx_multicast; | |
934 | stats->tx_packets += tx_packets; | |
935 | stats->tx_bytes += tx_bytes; | |
936 | /* rx_errors & tx_dropped are u32, updated | |
937 | * without syncp protection. | |
938 | */ | |
939 | rx_errors += p->rx_errors; | |
940 | tx_dropped += p->tx_dropped; | |
fccaf710 | 941 | } |
8ffab51b ED |
942 | stats->rx_errors = rx_errors; |
943 | stats->rx_dropped = rx_errors; | |
944 | stats->tx_dropped = tx_dropped; | |
fccaf710 | 945 | } |
fccaf710 ED |
946 | } |
947 | ||
8e586137 | 948 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 949 | __be16 proto, u16 vid) |
8d13e670 JF |
950 | { |
951 | struct macvlan_dev *vlan = netdev_priv(dev); | |
952 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 953 | |
80d5c368 | 954 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
955 | } |
956 | ||
8e586137 | 957 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 958 | __be16 proto, u16 vid) |
8d13e670 JF |
959 | { |
960 | struct macvlan_dev *vlan = netdev_priv(dev); | |
961 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 962 | |
80d5c368 | 963 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 964 | return 0; |
8d13e670 JF |
965 | } |
966 | ||
edc7d573 | 967 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 968 | struct net_device *dev, |
f6f6424b | 969 | const unsigned char *addr, u16 vid, |
df8ef8f3 JF |
970 | u16 flags) |
971 | { | |
972 | struct macvlan_dev *vlan = netdev_priv(dev); | |
973 | int err = -EINVAL; | |
974 | ||
8a50f11c VY |
975 | /* Support unicast filter only on passthru devices. |
976 | * Multicast filter should be allowed on all devices. | |
977 | */ | |
43c2d578 | 978 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
979 | return -EOPNOTSUPP; |
980 | ||
ab2cfbb2 TR |
981 | if (flags & NLM_F_REPLACE) |
982 | return -EOPNOTSUPP; | |
983 | ||
df8ef8f3 JF |
984 | if (is_unicast_ether_addr(addr)) |
985 | err = dev_uc_add_excl(dev, addr); | |
986 | else if (is_multicast_ether_addr(addr)) | |
987 | err = dev_mc_add_excl(dev, addr); | |
988 | ||
989 | return err; | |
990 | } | |
991 | ||
1690be63 | 992 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 993 | struct net_device *dev, |
f6f6424b | 994 | const unsigned char *addr, u16 vid) |
df8ef8f3 JF |
995 | { |
996 | struct macvlan_dev *vlan = netdev_priv(dev); | |
997 | int err = -EINVAL; | |
998 | ||
8a50f11c VY |
999 | /* Support unicast filter only on passthru devices. |
1000 | * Multicast filter should be allowed on all devices. | |
1001 | */ | |
43c2d578 | 1002 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
1003 | return -EOPNOTSUPP; |
1004 | ||
1005 | if (is_unicast_ether_addr(addr)) | |
1006 | err = dev_uc_del(dev, addr); | |
1007 | else if (is_multicast_ether_addr(addr)) | |
1008 | err = dev_mc_del(dev, addr); | |
1009 | ||
1010 | return err; | |
1011 | } | |
1012 | ||
b863ceb7 PM |
1013 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
1014 | struct ethtool_drvinfo *drvinfo) | |
1015 | { | |
7826d43f JP |
1016 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
1017 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
1018 | } |
1019 | ||
85f95819 DD |
1020 | static int macvlan_ethtool_get_link_ksettings(struct net_device *dev, |
1021 | struct ethtool_link_ksettings *cmd) | |
9edb8bb6 SH |
1022 | { |
1023 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 | 1024 | |
85f95819 | 1025 | return __ethtool_get_link_ksettings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
1026 | } |
1027 | ||
2be5c767 VY |
1028 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
1029 | netdev_features_t features) | |
1030 | { | |
1031 | struct macvlan_dev *vlan = netdev_priv(dev); | |
62dbe830 | 1032 | netdev_features_t lowerdev_features = vlan->lowerdev->features; |
797f87f8 | 1033 | netdev_features_t mask; |
2be5c767 | 1034 | |
797f87f8 FW |
1035 | features |= NETIF_F_ALL_FOR_ALL; |
1036 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
1037 | mask = features; | |
1038 | ||
62dbe830 MK |
1039 | lowerdev_features &= (features | ~NETIF_F_LRO); |
1040 | features = netdev_increment_features(lowerdev_features, features, mask); | |
8b4703e9 | 1041 | features |= ALWAYS_ON_FEATURES; |
37e70a4f | 1042 | features &= (ALWAYS_ON_FEATURES | MACVLAN_FEATURES); |
797f87f8 FW |
1043 | |
1044 | return features; | |
2be5c767 VY |
1045 | } |
1046 | ||
688cea83 | 1047 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1048 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
1049 | { | |
1050 | return; | |
1051 | } | |
1052 | ||
1053 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
1054 | { | |
1055 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1056 | struct net_device *real_dev = vlan->lowerdev; | |
1057 | struct netpoll *netpoll; | |
1058 | int err = 0; | |
1059 | ||
1060 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
1061 | err = -ENOMEM; | |
1062 | if (!netpoll) | |
1063 | goto out; | |
1064 | ||
1065 | err = __netpoll_setup(netpoll, real_dev); | |
1066 | if (err) { | |
1067 | kfree(netpoll); | |
1068 | goto out; | |
1069 | } | |
1070 | ||
1071 | vlan->netpoll = netpoll; | |
1072 | ||
1073 | out: | |
1074 | return err; | |
1075 | } | |
1076 | ||
1077 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
1078 | { | |
1079 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1080 | struct netpoll *netpoll = vlan->netpoll; | |
1081 | ||
1082 | if (!netpoll) | |
1083 | return; | |
1084 | ||
1085 | vlan->netpoll = NULL; | |
1086 | ||
1087 | __netpoll_free_async(netpoll); | |
1088 | } | |
1089 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1090 | ||
ef5fa6bc ND |
1091 | static int macvlan_dev_get_iflink(const struct net_device *dev) |
1092 | { | |
1093 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1094 | ||
1095 | return vlan->lowerdev->ifindex; | |
1096 | } | |
1097 | ||
b863ceb7 PM |
1098 | static const struct ethtool_ops macvlan_ethtool_ops = { |
1099 | .get_link = ethtool_op_get_link, | |
85f95819 | 1100 | .get_link_ksettings = macvlan_ethtool_get_link_ksettings, |
b863ceb7 PM |
1101 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
1102 | }; | |
1103 | ||
54a30c97 SH |
1104 | static const struct net_device_ops macvlan_netdev_ops = { |
1105 | .ndo_init = macvlan_init, | |
fccaf710 | 1106 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
1107 | .ndo_open = macvlan_open, |
1108 | .ndo_stop = macvlan_stop, | |
00829823 | 1109 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 1110 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 1111 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
1112 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
1113 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 1114 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 1115 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 1116 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
1117 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
1118 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
1119 | .ndo_fdb_add = macvlan_fdb_add, |
1120 | .ndo_fdb_del = macvlan_fdb_del, | |
1121 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 1122 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
688cea83 | 1123 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1124 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
1125 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
1126 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
1127 | #endif | |
ef5fa6bc | 1128 | .ndo_get_iflink = macvlan_dev_get_iflink, |
f56e67b5 | 1129 | .ndo_features_check = passthru_features_check, |
54a30c97 SH |
1130 | }; |
1131 | ||
8a35747a | 1132 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
1133 | { |
1134 | ether_setup(dev); | |
1135 | ||
91572088 JW |
1136 | dev->min_mtu = 0; |
1137 | dev->max_mtu = ETH_MAX_MTU; | |
02875878 ED |
1138 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1139 | netif_keep_dst(dev); | |
87ab7f6f | 1140 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 1141 | dev->netdev_ops = &macvlan_netdev_ops; |
cf124db5 | 1142 | dev->needs_free_netdev = true; |
71740129 | 1143 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 1144 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
1145 | } |
1146 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
1147 | ||
1148 | static void macvlan_setup(struct net_device *dev) | |
1149 | { | |
1150 | macvlan_common_setup(dev); | |
7009212b | 1151 | dev->priv_flags |= IFF_NO_QUEUE; |
b863ceb7 PM |
1152 | } |
1153 | ||
1154 | static int macvlan_port_create(struct net_device *dev) | |
1155 | { | |
1156 | struct macvlan_port *port; | |
1157 | unsigned int i; | |
ab95bfe0 | 1158 | int err; |
b863ceb7 PM |
1159 | |
1160 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
1161 | return -EINVAL; | |
1162 | ||
322dc6e0 | 1163 | if (netdev_is_rx_handler_busy(dev)) |
d6b00fec MB |
1164 | return -EBUSY; |
1165 | ||
b863ceb7 PM |
1166 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1167 | if (port == NULL) | |
1168 | return -ENOMEM; | |
1169 | ||
1170 | port->dev = dev; | |
18c8c54d | 1171 | ether_addr_copy(port->perm_addr, dev->dev_addr); |
b863ceb7 PM |
1172 | INIT_LIST_HEAD(&port->vlans); |
1173 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
1174 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
79cf79ab MB |
1175 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
1176 | INIT_HLIST_HEAD(&port->vlan_source_hash[i]); | |
ab95bfe0 | 1177 | |
412ca155 HX |
1178 | skb_queue_head_init(&port->bc_queue); |
1179 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
1180 | ||
a35e2c1b JP |
1181 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
1182 | if (err) | |
ab95bfe0 | 1183 | kfree(port); |
d9351561 ED |
1184 | else |
1185 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 1186 | return err; |
b863ceb7 PM |
1187 | } |
1188 | ||
1189 | static void macvlan_port_destroy(struct net_device *dev) | |
1190 | { | |
e052f7e6 | 1191 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
f6478218 | 1192 | struct sk_buff *skb; |
b863ceb7 | 1193 | |
a35e2c1b | 1194 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 1195 | netdev_rx_handler_unregister(dev); |
fe0ca732 ED |
1196 | |
1197 | /* After this point, no packet can schedule bc_work anymore, | |
1198 | * but we need to cancel it and purge left skbs if any. | |
1199 | */ | |
1200 | cancel_work_sync(&port->bc_work); | |
f6478218 HX |
1201 | |
1202 | while ((skb = __skb_dequeue(&port->bc_queue))) { | |
1203 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
1204 | ||
1205 | if (src) | |
1206 | dev_put(src->dev); | |
1207 | ||
1208 | kfree_skb(skb); | |
1209 | } | |
fe0ca732 | 1210 | |
18c8c54d VY |
1211 | /* If the lower device address has been changed by passthru |
1212 | * macvlan, put it back. | |
1213 | */ | |
1214 | if (macvlan_passthru(port) && | |
1215 | !ether_addr_equal(port->dev->dev_addr, port->perm_addr)) { | |
1216 | struct sockaddr sa; | |
1217 | ||
1218 | sa.sa_family = port->dev->type; | |
1219 | memcpy(&sa.sa_data, port->perm_addr, port->dev->addr_len); | |
1220 | dev_set_mac_address(port->dev, &sa); | |
1221 | } | |
1222 | ||
a1f5315c | 1223 | kfree(port); |
b863ceb7 PM |
1224 | } |
1225 | ||
a8b8a889 MS |
1226 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], |
1227 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1228 | { |
1229 | if (tb[IFLA_ADDRESS]) { | |
1230 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1231 | return -EINVAL; | |
1232 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1233 | return -EADDRNOTAVAIL; | |
1234 | } | |
27c0b1a8 | 1235 | |
07850a4f ZS |
1236 | if (!data) |
1237 | return 0; | |
1238 | ||
1239 | if (data[IFLA_MACVLAN_FLAGS] && | |
15127478 MT |
1240 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) |
1241 | return -EINVAL; | |
1242 | ||
07850a4f | 1243 | if (data[IFLA_MACVLAN_MODE]) { |
27c0b1a8 AB |
1244 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { |
1245 | case MACVLAN_MODE_PRIVATE: | |
1246 | case MACVLAN_MODE_VEPA: | |
1247 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 1248 | case MACVLAN_MODE_PASSTHRU: |
79cf79ab MB |
1249 | case MACVLAN_MODE_SOURCE: |
1250 | break; | |
1251 | default: | |
1252 | return -EINVAL; | |
1253 | } | |
1254 | } | |
1255 | ||
07850a4f | 1256 | if (data[IFLA_MACVLAN_MACADDR_MODE]) { |
79cf79ab MB |
1257 | switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { |
1258 | case MACVLAN_MACADDR_ADD: | |
1259 | case MACVLAN_MACADDR_DEL: | |
1260 | case MACVLAN_MACADDR_FLUSH: | |
1261 | case MACVLAN_MACADDR_SET: | |
27c0b1a8 AB |
1262 | break; |
1263 | default: | |
1264 | return -EINVAL; | |
1265 | } | |
1266 | } | |
79cf79ab | 1267 | |
07850a4f | 1268 | if (data[IFLA_MACVLAN_MACADDR]) { |
79cf79ab MB |
1269 | if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) |
1270 | return -EINVAL; | |
1271 | ||
1272 | if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) | |
1273 | return -EADDRNOTAVAIL; | |
1274 | } | |
1275 | ||
07850a4f | 1276 | if (data[IFLA_MACVLAN_MACADDR_COUNT]) |
79cf79ab MB |
1277 | return -EINVAL; |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | /** | |
1283 | * reconfigure list of remote source mac address | |
1284 | * (only for macvlan devices in source mode) | |
1285 | * Note regarding alignment: all netlink data is aligned to 4 Byte, which | |
1286 | * suffices for both ether_addr_copy and ether_addr_equal_64bits usage. | |
1287 | */ | |
1288 | static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, | |
1289 | struct nlattr *data[]) | |
1290 | { | |
1291 | char *addr = NULL; | |
1292 | int ret, rem, len; | |
1293 | struct nlattr *nla, *head; | |
1294 | struct macvlan_source_entry *entry; | |
1295 | ||
1296 | if (data[IFLA_MACVLAN_MACADDR]) | |
1297 | addr = nla_data(data[IFLA_MACVLAN_MACADDR]); | |
1298 | ||
1299 | if (mode == MACVLAN_MACADDR_ADD) { | |
1300 | if (!addr) | |
1301 | return -EINVAL; | |
1302 | ||
1303 | return macvlan_hash_add_source(vlan, addr); | |
1304 | ||
1305 | } else if (mode == MACVLAN_MACADDR_DEL) { | |
1306 | if (!addr) | |
1307 | return -EINVAL; | |
1308 | ||
1309 | entry = macvlan_hash_lookup_source(vlan, addr); | |
1310 | if (entry) { | |
1311 | macvlan_hash_del_source(entry); | |
1312 | vlan->macaddr_count--; | |
1313 | } | |
1314 | } else if (mode == MACVLAN_MACADDR_FLUSH) { | |
1315 | macvlan_flush_sources(vlan->port, vlan); | |
1316 | } else if (mode == MACVLAN_MACADDR_SET) { | |
1317 | macvlan_flush_sources(vlan->port, vlan); | |
1318 | ||
1319 | if (addr) { | |
1320 | ret = macvlan_hash_add_source(vlan, addr); | |
1321 | if (ret) | |
1322 | return ret; | |
1323 | } | |
1324 | ||
1325 | if (!data || !data[IFLA_MACVLAN_MACADDR_DATA]) | |
1326 | return 0; | |
1327 | ||
1328 | head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1329 | len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1330 | ||
1331 | nla_for_each_attr(nla, head, len, rem) { | |
1332 | if (nla_type(nla) != IFLA_MACVLAN_MACADDR || | |
1333 | nla_len(nla) != ETH_ALEN) | |
1334 | continue; | |
1335 | ||
1336 | addr = nla_data(nla); | |
1337 | ret = macvlan_hash_add_source(vlan, addr); | |
1338 | if (ret) | |
1339 | return ret; | |
1340 | } | |
1341 | } else { | |
1342 | return -EINVAL; | |
1343 | } | |
1344 | ||
b863ceb7 PM |
1345 | return 0; |
1346 | } | |
1347 | ||
fc0663d6 | 1348 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
42ab19ee DA |
1349 | struct nlattr *tb[], struct nlattr *data[], |
1350 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1351 | { |
1352 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1353 | struct macvlan_port *port; | |
1354 | struct net_device *lowerdev; | |
1355 | int err; | |
79cf79ab | 1356 | int macmode; |
aa5fd0fb | 1357 | bool create = false; |
b863ceb7 PM |
1358 | |
1359 | if (!tb[IFLA_LINK]) | |
1360 | return -EINVAL; | |
1361 | ||
81adee47 | 1362 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
1363 | if (lowerdev == NULL) |
1364 | return -ENODEV; | |
1365 | ||
d70f2cf5 | 1366 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 1367 | * the real device as the lowerdev. |
a6ca5f1d | 1368 | */ |
d70f2cf5 KW |
1369 | if (netif_is_macvlan(lowerdev)) |
1370 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 1371 | |
b863ceb7 PM |
1372 | if (!tb[IFLA_MTU]) |
1373 | dev->mtu = lowerdev->mtu; | |
1374 | else if (dev->mtu > lowerdev->mtu) | |
1375 | return -EINVAL; | |
1376 | ||
91572088 JW |
1377 | /* MTU range: 68 - lowerdev->max_mtu */ |
1378 | dev->min_mtu = ETH_MIN_MTU; | |
1379 | dev->max_mtu = lowerdev->max_mtu; | |
1380 | ||
b863ceb7 | 1381 | if (!tb[IFLA_ADDRESS]) |
7ce5d222 | 1382 | eth_hw_addr_random(dev); |
b863ceb7 | 1383 | |
a35e2c1b | 1384 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
1385 | err = macvlan_port_create(lowerdev); |
1386 | if (err < 0) | |
1387 | return err; | |
aa5fd0fb | 1388 | create = true; |
b863ceb7 | 1389 | } |
e052f7e6 | 1390 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1391 | |
eb06acdc | 1392 | /* Only 1 macvlan device can be created in passthru mode */ |
43c2d578 | 1393 | if (macvlan_passthru(port)) { |
aa5fd0fb GF |
1394 | /* The macvlan port must be not created this time, |
1395 | * still goto destroy_macvlan_port for readability. | |
1396 | */ | |
1397 | err = -EINVAL; | |
1398 | goto destroy_macvlan_port; | |
1399 | } | |
eb06acdc | 1400 | |
b863ceb7 PM |
1401 | vlan->lowerdev = lowerdev; |
1402 | vlan->dev = dev; | |
1403 | vlan->port = port; | |
2be5c767 | 1404 | vlan->set_features = MACVLAN_FEATURES; |
952fcfd0 | 1405 | vlan->nest_level = dev_get_nest_level(lowerdev) + 1; |
b863ceb7 | 1406 | |
27c0b1a8 AB |
1407 | vlan->mode = MACVLAN_MODE_VEPA; |
1408 | if (data && data[IFLA_MACVLAN_MODE]) | |
1409 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1410 | ||
df8ef8f3 JF |
1411 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1412 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1413 | ||
eb06acdc | 1414 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
aa5fd0fb GF |
1415 | if (port->count) { |
1416 | err = -EINVAL; | |
1417 | goto destroy_macvlan_port; | |
1418 | } | |
43c2d578 | 1419 | macvlan_set_passthru(port); |
8b98604e | 1420 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1421 | } |
1422 | ||
79cf79ab | 1423 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
aa5fd0fb GF |
1424 | if (vlan->mode != MACVLAN_MODE_SOURCE) { |
1425 | err = -EINVAL; | |
1426 | goto destroy_macvlan_port; | |
1427 | } | |
79cf79ab MB |
1428 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); |
1429 | err = macvlan_changelink_sources(vlan, macmode, data); | |
1430 | if (err) | |
aa5fd0fb | 1431 | goto destroy_macvlan_port; |
79cf79ab MB |
1432 | } |
1433 | ||
47d4ab91 JF |
1434 | err = register_netdevice(dev); |
1435 | if (err < 0) | |
aa5fd0fb | 1436 | goto destroy_macvlan_port; |
47d4ab91 | 1437 | |
a6cc0cfa | 1438 | dev->priv_flags |= IFF_MACVLAN; |
42ab19ee | 1439 | err = netdev_upper_dev_link(lowerdev, dev, extack); |
7cd43db7 | 1440 | if (err) |
da37705c | 1441 | goto unregister_netdev; |
b863ceb7 | 1442 | |
233c7df0 | 1443 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1444 | netif_stacked_transfer_operstate(lowerdev, dev); |
de7d244d | 1445 | linkwatch_fire_event(dev); |
f16d3d57 | 1446 | |
b863ceb7 | 1447 | return 0; |
f16d3d57 | 1448 | |
da37705c | 1449 | unregister_netdev: |
d02fd6e7 | 1450 | /* macvlan_uninit would free the macvlan port */ |
da37705c | 1451 | unregister_netdevice(dev); |
d02fd6e7 | 1452 | return err; |
aa5fd0fb | 1453 | destroy_macvlan_port: |
d02fd6e7 GF |
1454 | /* the macvlan port may be freed by macvlan_uninit when fail to register. |
1455 | * so we destroy the macvlan port only when it's valid. | |
1456 | */ | |
5a911f68 | 1457 | if (create && macvlan_port_get_rtnl(lowerdev)) |
aa5fd0fb | 1458 | macvlan_port_destroy(port->dev); |
f16d3d57 | 1459 | return err; |
b863ceb7 | 1460 | } |
fc0663d6 | 1461 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1462 | |
fc0663d6 | 1463 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
1464 | struct nlattr *tb[], struct nlattr *data[], |
1465 | struct netlink_ext_ack *extack) | |
fc0663d6 | 1466 | { |
42ab19ee | 1467 | return macvlan_common_newlink(src_net, dev, tb, data, extack); |
fc0663d6 AB |
1468 | } |
1469 | ||
1470 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1471 | { |
1472 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1473 | |
79cf79ab MB |
1474 | if (vlan->mode == MACVLAN_MODE_SOURCE) |
1475 | macvlan_flush_sources(vlan->port, vlan); | |
233c7df0 | 1476 | list_del_rcu(&vlan->list); |
23289a37 | 1477 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1478 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1479 | } |
fc0663d6 | 1480 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1481 | |
27c0b1a8 | 1482 | static int macvlan_changelink(struct net_device *dev, |
ad744b22 MS |
1483 | struct nlattr *tb[], struct nlattr *data[], |
1484 | struct netlink_ext_ack *extack) | |
27c0b1a8 AB |
1485 | { |
1486 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1487 | enum macvlan_mode mode; |
1488 | bool set_mode = false; | |
79cf79ab MB |
1489 | enum macvlan_macaddr_mode macmode; |
1490 | int ret; | |
266e8347 MT |
1491 | |
1492 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1493 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1494 | set_mode = true; | |
1495 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1496 | /* Passthrough mode can't be set or cleared dynamically */ | |
1497 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1498 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1499 | return -EINVAL; | |
79cf79ab MB |
1500 | if (vlan->mode == MACVLAN_MODE_SOURCE && |
1501 | vlan->mode != mode) | |
1502 | macvlan_flush_sources(vlan->port, vlan); | |
266e8347 | 1503 | } |
99ffc3e7 | 1504 | |
df8ef8f3 JF |
1505 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1506 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1507 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
43c2d578 | 1508 | if (macvlan_passthru(vlan->port) && promisc) { |
99ffc3e7 MT |
1509 | int err; |
1510 | ||
1511 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1512 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1513 | else | |
1514 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1515 | if (err < 0) | |
1516 | return err; | |
1517 | } | |
df8ef8f3 JF |
1518 | vlan->flags = flags; |
1519 | } | |
266e8347 MT |
1520 | if (set_mode) |
1521 | vlan->mode = mode; | |
79cf79ab MB |
1522 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1523 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1524 | return -EINVAL; | |
1525 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1526 | ret = macvlan_changelink_sources(vlan, macmode, data); | |
1527 | if (ret) | |
1528 | return ret; | |
1529 | } | |
27c0b1a8 AB |
1530 | return 0; |
1531 | } | |
1532 | ||
79cf79ab MB |
1533 | static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan) |
1534 | { | |
1535 | if (vlan->macaddr_count == 0) | |
1536 | return 0; | |
1537 | return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */ | |
1538 | + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN); | |
1539 | } | |
1540 | ||
27c0b1a8 AB |
1541 | static size_t macvlan_get_size(const struct net_device *dev) |
1542 | { | |
79cf79ab MB |
1543 | struct macvlan_dev *vlan = netdev_priv(dev); |
1544 | ||
01fe944f ED |
1545 | return (0 |
1546 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1547 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
79cf79ab MB |
1548 | + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */ |
1549 | + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */ | |
01fe944f | 1550 | ); |
27c0b1a8 AB |
1551 | } |
1552 | ||
79cf79ab MB |
1553 | static int macvlan_fill_info_macaddr(struct sk_buff *skb, |
1554 | const struct macvlan_dev *vlan, | |
1555 | const int i) | |
1556 | { | |
1557 | struct hlist_head *h = &vlan->port->vlan_source_hash[i]; | |
1558 | struct macvlan_source_entry *entry; | |
1559 | ||
1560 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
1561 | if (entry->vlan != vlan) | |
1562 | continue; | |
1563 | if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) | |
1564 | return 1; | |
1565 | } | |
1566 | return 0; | |
1567 | } | |
1568 | ||
27c0b1a8 AB |
1569 | static int macvlan_fill_info(struct sk_buff *skb, |
1570 | const struct net_device *dev) | |
1571 | { | |
1572 | struct macvlan_dev *vlan = netdev_priv(dev); | |
79cf79ab MB |
1573 | int i; |
1574 | struct nlattr *nest; | |
27c0b1a8 | 1575 | |
ead9a76c DM |
1576 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1577 | goto nla_put_failure; | |
df8ef8f3 JF |
1578 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1579 | goto nla_put_failure; | |
79cf79ab MB |
1580 | if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count)) |
1581 | goto nla_put_failure; | |
1582 | if (vlan->macaddr_count > 0) { | |
1583 | nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA); | |
1584 | if (nest == NULL) | |
1585 | goto nla_put_failure; | |
1586 | ||
1587 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
1588 | if (macvlan_fill_info_macaddr(skb, vlan, i)) | |
1589 | goto nla_put_failure; | |
1590 | } | |
1591 | nla_nest_end(skb, nest); | |
1592 | } | |
27c0b1a8 AB |
1593 | return 0; |
1594 | ||
1595 | nla_put_failure: | |
1596 | return -EMSGSIZE; | |
1597 | } | |
1598 | ||
1599 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1600 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1601 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
79cf79ab MB |
1602 | [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, |
1603 | [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
1604 | [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, | |
1605 | [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 }, | |
27c0b1a8 AB |
1606 | }; |
1607 | ||
fc0663d6 AB |
1608 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1609 | { | |
1610 | /* common fields */ | |
fc0663d6 AB |
1611 | ops->validate = macvlan_validate; |
1612 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1613 | ops->policy = macvlan_policy; | |
1614 | ops->changelink = macvlan_changelink; | |
1615 | ops->get_size = macvlan_get_size; | |
1616 | ops->fill_info = macvlan_fill_info; | |
1617 | ||
1618 | return rtnl_link_register(ops); | |
1619 | }; | |
1620 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1621 | ||
eaca400f ND |
1622 | static struct net *macvlan_get_link_net(const struct net_device *dev) |
1623 | { | |
1624 | return dev_net(macvlan_dev_real_dev(dev)); | |
1625 | } | |
1626 | ||
fc0663d6 | 1627 | static struct rtnl_link_ops macvlan_link_ops = { |
b863ceb7 | 1628 | .kind = "macvlan", |
8a35747a | 1629 | .setup = macvlan_setup, |
b863ceb7 PM |
1630 | .newlink = macvlan_newlink, |
1631 | .dellink = macvlan_dellink, | |
eaca400f | 1632 | .get_link_net = macvlan_get_link_net, |
6fe3faf8 | 1633 | .priv_size = sizeof(struct macvlan_dev), |
b863ceb7 PM |
1634 | }; |
1635 | ||
1636 | static int macvlan_device_event(struct notifier_block *unused, | |
1637 | unsigned long event, void *ptr) | |
1638 | { | |
351638e7 | 1639 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1640 | struct macvlan_dev *vlan, *next; |
1641 | struct macvlan_port *port; | |
226bd341 | 1642 | LIST_HEAD(list_kill); |
b863ceb7 | 1643 | |
a35e2c1b | 1644 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
1645 | return NOTIFY_DONE; |
1646 | ||
e052f7e6 | 1647 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1648 | |
b863ceb7 | 1649 | switch (event) { |
de7d244d | 1650 | case NETDEV_UP: |
b863ceb7 PM |
1651 | case NETDEV_CHANGE: |
1652 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1653 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1654 | vlan->dev); | |
b863ceb7 PM |
1655 | break; |
1656 | case NETDEV_FEAT_CHANGE: | |
1657 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1658 | vlan->dev->gso_max_size = dev->gso_max_size; |
f6773c5e | 1659 | vlan->dev->gso_max_segs = dev->gso_max_segs; |
797f87f8 | 1660 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1661 | } |
1662 | break; | |
3763e7ef | 1663 | case NETDEV_CHANGEMTU: |
1664 | list_for_each_entry(vlan, &port->vlans, list) { | |
1665 | if (vlan->dev->mtu <= dev->mtu) | |
1666 | continue; | |
1667 | dev_set_mtu(vlan->dev, dev->mtu); | |
1668 | } | |
e289fd28 | 1669 | break; |
1670 | case NETDEV_CHANGEADDR: | |
43c2d578 | 1671 | if (!macvlan_passthru(port)) |
e289fd28 | 1672 | return NOTIFY_DONE; |
1673 | ||
1674 | vlan = list_first_entry_or_null(&port->vlans, | |
1675 | struct macvlan_dev, | |
1676 | list); | |
1677 | ||
1678 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1679 | return NOTIFY_BAD; | |
1680 | ||
3763e7ef | 1681 | break; |
b863ceb7 | 1682 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1683 | /* twiddle thumbs on netns device moves */ |
1684 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1685 | break; | |
1686 | ||
b863ceb7 | 1687 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1688 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1689 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1690 | break; |
1c01fe14 JP |
1691 | case NETDEV_PRE_TYPE_CHANGE: |
1692 | /* Forbid underlaying device to change its type. */ | |
1693 | return NOTIFY_BAD; | |
4c991255 VY |
1694 | |
1695 | case NETDEV_NOTIFY_PEERS: | |
1696 | case NETDEV_BONDING_FAILOVER: | |
1697 | case NETDEV_RESEND_IGMP: | |
1698 | /* Propagate to all vlans */ | |
1699 | list_for_each_entry(vlan, &port->vlans, list) | |
1700 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1701 | } |
1702 | return NOTIFY_DONE; | |
1703 | } | |
1704 | ||
1705 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1706 | .notifier_call = macvlan_device_event, | |
1707 | }; | |
1708 | ||
1709 | static int __init macvlan_init_module(void) | |
1710 | { | |
1711 | int err; | |
1712 | ||
1713 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1714 | |
fc0663d6 | 1715 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1716 | if (err < 0) |
1717 | goto err1; | |
1718 | return 0; | |
1719 | err1: | |
b863ceb7 PM |
1720 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1721 | return err; | |
1722 | } | |
1723 | ||
1724 | static void __exit macvlan_cleanup_module(void) | |
1725 | { | |
1726 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1727 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1728 | } | |
1729 | ||
1730 | module_init(macvlan_init_module); | |
1731 | module_exit(macvlan_cleanup_module); | |
1732 | ||
1733 | MODULE_LICENSE("GPL"); | |
1734 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1735 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1736 | MODULE_ALIAS_RTNL_LINK("macvlan"); |