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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
b863ceb7 PM |
2 | /* |
3 | * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> | |
4 | * | |
b863ceb7 PM |
5 | * The code this is based on carried the following copyright notice: |
6 | * --- | |
7 | * (C) Copyright 2001-2006 | |
8 | * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com | |
9 | * Re-worked by Ben Greear <greearb@candelatech.com> | |
10 | * --- | |
11 | */ | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/string.h> | |
82524746 | 19 | #include <linux/rculist.h> |
b863ceb7 PM |
20 | #include <linux/notifier.h> |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/etherdevice.h> | |
254c0a2b | 23 | #include <linux/net_tstamp.h> |
b863ceb7 PM |
24 | #include <linux/ethtool.h> |
25 | #include <linux/if_arp.h> | |
87002b03 | 26 | #include <linux/if_vlan.h> |
b863ceb7 PM |
27 | #include <linux/if_link.h> |
28 | #include <linux/if_macvlan.h> | |
cd431e73 | 29 | #include <linux/hash.h> |
412ca155 | 30 | #include <linux/workqueue.h> |
b863ceb7 | 31 | #include <net/rtnetlink.h> |
618e1b74 | 32 | #include <net/xfrm.h> |
688cea83 | 33 | #include <linux/netpoll.h> |
254c0a2b | 34 | #include <linux/phy.h> |
b863ceb7 | 35 | |
79cf79ab MB |
36 | #define MACVLAN_HASH_BITS 8 |
37 | #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS) | |
07d92d5c | 38 | #define MACVLAN_BC_QUEUE_LEN 1000 |
b863ceb7 | 39 | |
43c2d578 | 40 | #define MACVLAN_F_PASSTHRU 1 |
18c8c54d | 41 | #define MACVLAN_F_ADDRCHANGE 2 |
43c2d578 | 42 | |
b863ceb7 PM |
43 | struct macvlan_port { |
44 | struct net_device *dev; | |
45 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
46 | struct list_head vlans; | |
412ca155 HX |
47 | struct sk_buff_head bc_queue; |
48 | struct work_struct bc_work; | |
43c2d578 | 49 | u32 flags; |
5e3c516b | 50 | int count; |
79cf79ab | 51 | struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; |
9c127a01 | 52 | DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); |
18c8c54d | 53 | unsigned char perm_addr[ETH_ALEN]; |
79cf79ab MB |
54 | }; |
55 | ||
56 | struct macvlan_source_entry { | |
57 | struct hlist_node hlist; | |
58 | struct macvlan_dev *vlan; | |
59 | unsigned char addr[6+2] __aligned(sizeof(u16)); | |
60 | struct rcu_head rcu; | |
b863ceb7 PM |
61 | }; |
62 | ||
412ca155 HX |
63 | struct macvlan_skb_cb { |
64 | const struct macvlan_dev *src; | |
65 | }; | |
66 | ||
67 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
68 | ||
d5cd9244 EB |
69 | static void macvlan_port_destroy(struct net_device *dev); |
70 | ||
43c2d578 VY |
71 | static inline bool macvlan_passthru(const struct macvlan_port *port) |
72 | { | |
73 | return port->flags & MACVLAN_F_PASSTHRU; | |
74 | } | |
75 | ||
76 | static inline void macvlan_set_passthru(struct macvlan_port *port) | |
77 | { | |
78 | port->flags |= MACVLAN_F_PASSTHRU; | |
79 | } | |
80 | ||
18c8c54d VY |
81 | static inline bool macvlan_addr_change(const struct macvlan_port *port) |
82 | { | |
83 | return port->flags & MACVLAN_F_ADDRCHANGE; | |
84 | } | |
85 | ||
86 | static inline void macvlan_set_addr_change(struct macvlan_port *port) | |
87 | { | |
88 | port->flags |= MACVLAN_F_ADDRCHANGE; | |
89 | } | |
90 | ||
91 | static inline void macvlan_clear_addr_change(struct macvlan_port *port) | |
92 | { | |
93 | port->flags &= ~MACVLAN_F_ADDRCHANGE; | |
94 | } | |
95 | ||
79cf79ab MB |
96 | /* Hash Ethernet address */ |
97 | static u32 macvlan_eth_hash(const unsigned char *addr) | |
98 | { | |
99 | u64 value = get_unaligned((u64 *)addr); | |
100 | ||
101 | /* only want 6 bytes */ | |
102 | #ifdef __BIG_ENDIAN | |
103 | value >>= 16; | |
104 | #else | |
105 | value <<= 16; | |
106 | #endif | |
107 | return hash_64(value, MACVLAN_HASH_BITS); | |
108 | } | |
109 | ||
e052f7e6 ED |
110 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
111 | { | |
112 | return rcu_dereference(dev->rx_handler_data); | |
113 | } | |
114 | ||
115 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
116 | { | |
117 | return rtnl_dereference(dev->rx_handler_data); | |
118 | } | |
119 | ||
b863ceb7 PM |
120 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
121 | const unsigned char *addr) | |
122 | { | |
123 | struct macvlan_dev *vlan; | |
79cf79ab | 124 | u32 idx = macvlan_eth_hash(addr); |
b863ceb7 | 125 | |
79cf79ab | 126 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) { |
a6700db1 | 127 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
128 | return vlan; |
129 | } | |
130 | return NULL; | |
131 | } | |
132 | ||
79cf79ab MB |
133 | static struct macvlan_source_entry *macvlan_hash_lookup_source( |
134 | const struct macvlan_dev *vlan, | |
135 | const unsigned char *addr) | |
136 | { | |
137 | struct macvlan_source_entry *entry; | |
138 | u32 idx = macvlan_eth_hash(addr); | |
139 | struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; | |
140 | ||
141 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
142 | if (ether_addr_equal_64bits(entry->addr, addr) && | |
143 | entry->vlan == vlan) | |
144 | return entry; | |
145 | } | |
146 | return NULL; | |
147 | } | |
148 | ||
149 | static int macvlan_hash_add_source(struct macvlan_dev *vlan, | |
150 | const unsigned char *addr) | |
151 | { | |
152 | struct macvlan_port *port = vlan->port; | |
153 | struct macvlan_source_entry *entry; | |
154 | struct hlist_head *h; | |
155 | ||
156 | entry = macvlan_hash_lookup_source(vlan, addr); | |
157 | if (entry) | |
158 | return 0; | |
159 | ||
160 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
161 | if (!entry) | |
162 | return -ENOMEM; | |
163 | ||
164 | ether_addr_copy(entry->addr, addr); | |
165 | entry->vlan = vlan; | |
166 | h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; | |
167 | hlist_add_head_rcu(&entry->hlist, h); | |
168 | vlan->macaddr_count++; | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
f9ac30f0 EB |
173 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
174 | { | |
175 | struct macvlan_port *port = vlan->port; | |
176 | const unsigned char *addr = vlan->dev->dev_addr; | |
79cf79ab | 177 | u32 idx = macvlan_eth_hash(addr); |
f9ac30f0 | 178 | |
79cf79ab MB |
179 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); |
180 | } | |
181 | ||
182 | static void macvlan_hash_del_source(struct macvlan_source_entry *entry) | |
183 | { | |
184 | hlist_del_rcu(&entry->hlist); | |
185 | kfree_rcu(entry, rcu); | |
f9ac30f0 EB |
186 | } |
187 | ||
449f4544 | 188 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
189 | { |
190 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
191 | if (sync) |
192 | synchronize_rcu(); | |
f9ac30f0 EB |
193 | } |
194 | ||
195 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
196 | const unsigned char *addr) | |
197 | { | |
449f4544 | 198 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
199 | /* Now that we are unhashed it is safe to change the device |
200 | * address without confusing packet delivery. | |
201 | */ | |
202 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
203 | macvlan_hash_add(vlan); | |
204 | } | |
205 | ||
d94d0254 GF |
206 | static bool macvlan_addr_busy(const struct macvlan_port *port, |
207 | const unsigned char *addr) | |
f9ac30f0 | 208 | { |
18c8c54d | 209 | /* Test to see if the specified address is |
f9ac30f0 EB |
210 | * currently in use by the underlying device or |
211 | * another macvlan. | |
212 | */ | |
18c8c54d | 213 | if (!macvlan_passthru(port) && !macvlan_addr_change(port) && |
e696cda7 | 214 | ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
d94d0254 | 215 | return true; |
f9ac30f0 EB |
216 | |
217 | if (macvlan_hash_lookup(port, addr)) | |
d94d0254 | 218 | return true; |
f9ac30f0 | 219 | |
d94d0254 | 220 | return false; |
f9ac30f0 EB |
221 | } |
222 | ||
a1e514c5 | 223 | |
fc0663d6 AB |
224 | static int macvlan_broadcast_one(struct sk_buff *skb, |
225 | const struct macvlan_dev *vlan, | |
618e1b74 | 226 | const struct ethhdr *eth, bool local) |
a1e514c5 | 227 | { |
fc0663d6 | 228 | struct net_device *dev = vlan->dev; |
a1e514c5 | 229 | |
618e1b74 | 230 | if (local) |
412ca155 | 231 | return __dev_forward_skb(dev, skb); |
618e1b74 | 232 | |
a1e514c5 | 233 | skb->dev = dev; |
a6700db1 | 234 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
235 | skb->pkt_type = PACKET_BROADCAST; |
236 | else | |
237 | skb->pkt_type = PACKET_MULTICAST; | |
238 | ||
412ca155 | 239 | return 0; |
a1e514c5 AB |
240 | } |
241 | ||
3807ff58 ED |
242 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
243 | { | |
244 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
245 | } | |
246 | ||
247 | ||
248 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
249 | const unsigned char *addr) | |
cd431e73 ED |
250 | { |
251 | u32 val = __get_unaligned_cpu32(addr + 2); | |
252 | ||
3807ff58 | 253 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
254 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
255 | } | |
256 | ||
b863ceb7 | 257 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
258 | const struct macvlan_port *port, |
259 | struct net_device *src, | |
260 | enum macvlan_mode mode) | |
b863ceb7 PM |
261 | { |
262 | const struct ethhdr *eth = eth_hdr(skb); | |
263 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
264 | struct sk_buff *nskb; |
265 | unsigned int i; | |
a1e514c5 | 266 | int err; |
3807ff58 | 267 | unsigned int hash; |
b863ceb7 | 268 | |
efbbced3 PM |
269 | if (skb->protocol == htons(ETH_P_PAUSE)) |
270 | return; | |
271 | ||
b863ceb7 | 272 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 273 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
274 | if (vlan->dev == src || !(vlan->mode & mode)) |
275 | continue; | |
276 | ||
3807ff58 | 277 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
278 | if (!test_bit(hash, vlan->mc_filter)) |
279 | continue; | |
de9e8f3f HX |
280 | |
281 | err = NET_RX_DROP; | |
b863ceb7 | 282 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
283 | if (likely(nskb)) |
284 | err = macvlan_broadcast_one( | |
285 | nskb, vlan, eth, | |
412ca155 HX |
286 | mode == MACVLAN_MODE_BRIDGE) ?: |
287 | netif_rx_ni(nskb); | |
a1e514c5 | 288 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
4c979935 | 289 | err == NET_RX_SUCCESS, true); |
b863ceb7 PM |
290 | } |
291 | } | |
292 | } | |
293 | ||
412ca155 | 294 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 295 | { |
412ca155 HX |
296 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
297 | bc_work); | |
298 | struct sk_buff *skb; | |
299 | struct sk_buff_head list; | |
300 | ||
fe0ca732 | 301 | __skb_queue_head_init(&list); |
412ca155 HX |
302 | |
303 | spin_lock_bh(&port->bc_queue.lock); | |
304 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
305 | spin_unlock_bh(&port->bc_queue.lock); | |
306 | ||
307 | while ((skb = __skb_dequeue(&list))) { | |
308 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
309 | ||
310 | rcu_read_lock(); | |
b863ceb7 | 311 | |
618e1b74 AB |
312 | if (!src) |
313 | /* frame comes from an external address */ | |
314 | macvlan_broadcast(skb, port, NULL, | |
315 | MACVLAN_MODE_PRIVATE | | |
316 | MACVLAN_MODE_VEPA | | |
eb06acdc | 317 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
318 | MACVLAN_MODE_BRIDGE); |
319 | else if (src->mode == MACVLAN_MODE_VEPA) | |
320 | /* flood to everyone except source */ | |
321 | macvlan_broadcast(skb, port, src->dev, | |
322 | MACVLAN_MODE_VEPA | | |
323 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 324 | else |
618e1b74 AB |
325 | /* |
326 | * flood only to VEPA ports, bridge ports | |
327 | * already saw the frame on the way out. | |
328 | */ | |
329 | macvlan_broadcast(skb, port, src->dev, | |
330 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
331 | |
332 | rcu_read_unlock(); | |
333 | ||
260916df HX |
334 | if (src) |
335 | dev_put(src->dev); | |
bf97403a | 336 | consume_skb(skb); |
412ca155 HX |
337 | } |
338 | } | |
339 | ||
340 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
260916df | 341 | const struct macvlan_dev *src, |
412ca155 HX |
342 | struct sk_buff *skb) |
343 | { | |
e676f197 | 344 | struct sk_buff *nskb; |
412ca155 HX |
345 | int err = -ENOMEM; |
346 | ||
e676f197 HX |
347 | nskb = skb_clone(skb, GFP_ATOMIC); |
348 | if (!nskb) | |
412ca155 HX |
349 | goto err; |
350 | ||
260916df HX |
351 | MACVLAN_SKB_CB(nskb)->src = src; |
352 | ||
412ca155 | 353 | spin_lock(&port->bc_queue.lock); |
07d92d5c | 354 | if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { |
260916df HX |
355 | if (src) |
356 | dev_hold(src->dev); | |
e676f197 | 357 | __skb_queue_tail(&port->bc_queue, nskb); |
412ca155 HX |
358 | err = 0; |
359 | } | |
360 | spin_unlock(&port->bc_queue.lock); | |
361 | ||
362 | if (err) | |
e676f197 | 363 | goto free_nskb; |
412ca155 HX |
364 | |
365 | schedule_work(&port->bc_work); | |
366 | return; | |
367 | ||
e676f197 HX |
368 | free_nskb: |
369 | kfree_skb(nskb); | |
412ca155 HX |
370 | err: |
371 | atomic_long_inc(&skb->dev->rx_dropped); | |
372 | } | |
373 | ||
79cf79ab MB |
374 | static void macvlan_flush_sources(struct macvlan_port *port, |
375 | struct macvlan_dev *vlan) | |
376 | { | |
377 | int i; | |
378 | ||
379 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
380 | struct hlist_node *h, *n; | |
381 | ||
382 | hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { | |
383 | struct macvlan_source_entry *entry; | |
384 | ||
385 | entry = hlist_entry(h, struct macvlan_source_entry, | |
386 | hlist); | |
387 | if (entry->vlan == vlan) | |
388 | macvlan_hash_del_source(entry); | |
389 | } | |
390 | } | |
391 | vlan->macaddr_count = 0; | |
392 | } | |
393 | ||
394 | static void macvlan_forward_source_one(struct sk_buff *skb, | |
395 | struct macvlan_dev *vlan) | |
396 | { | |
397 | struct sk_buff *nskb; | |
398 | struct net_device *dev; | |
399 | int len; | |
400 | int ret; | |
401 | ||
402 | dev = vlan->dev; | |
403 | if (unlikely(!(dev->flags & IFF_UP))) | |
404 | return; | |
405 | ||
406 | nskb = skb_clone(skb, GFP_ATOMIC); | |
407 | if (!nskb) | |
408 | return; | |
409 | ||
410 | len = nskb->len + ETH_HLEN; | |
411 | nskb->dev = dev; | |
c8c41ea1 AD |
412 | |
413 | if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, dev->dev_addr)) | |
414 | nskb->pkt_type = PACKET_HOST; | |
79cf79ab MB |
415 | |
416 | ret = netif_rx(nskb); | |
4c979935 | 417 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
79cf79ab MB |
418 | } |
419 | ||
420 | static void macvlan_forward_source(struct sk_buff *skb, | |
421 | struct macvlan_port *port, | |
422 | const unsigned char *addr) | |
423 | { | |
424 | struct macvlan_source_entry *entry; | |
425 | u32 idx = macvlan_eth_hash(addr); | |
426 | struct hlist_head *h = &port->vlan_source_hash[idx]; | |
427 | ||
428 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
429 | if (ether_addr_equal_64bits(entry->addr, addr)) | |
fc51f2b7 | 430 | macvlan_forward_source_one(skb, entry->vlan); |
79cf79ab MB |
431 | } |
432 | } | |
433 | ||
412ca155 HX |
434 | /* called under rcu_read_lock() from netif_receive_skb */ |
435 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
436 | { | |
437 | struct macvlan_port *port; | |
438 | struct sk_buff *skb = *pskb; | |
439 | const struct ethhdr *eth = eth_hdr(skb); | |
440 | const struct macvlan_dev *vlan; | |
441 | const struct macvlan_dev *src; | |
442 | struct net_device *dev; | |
443 | unsigned int len = 0; | |
d1dd9119 | 444 | int ret; |
445 | rx_handler_result_t handle_res; | |
412ca155 HX |
446 | |
447 | port = macvlan_port_get_rcu(skb->dev); | |
448 | if (is_multicast_ether_addr(eth->h_dest)) { | |
9c127a01 HX |
449 | unsigned int hash; |
450 | ||
19bcf9f2 | 451 | skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN); |
412ca155 HX |
452 | if (!skb) |
453 | return RX_HANDLER_CONSUMED; | |
e639b8d8 | 454 | *pskb = skb; |
412ca155 | 455 | eth = eth_hdr(skb); |
79cf79ab | 456 | macvlan_forward_source(skb, port, eth->h_source); |
412ca155 HX |
457 | src = macvlan_hash_lookup(port, eth->h_source); |
458 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
459 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 460 | /* forward to original port. */ |
461 | vlan = src; | |
412ca155 HX |
462 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
463 | netif_rx(skb); | |
d1dd9119 | 464 | handle_res = RX_HANDLER_CONSUMED; |
729e72a1 | 465 | goto out; |
466 | } | |
467 | ||
9c127a01 HX |
468 | hash = mc_hash(NULL, eth->h_dest); |
469 | if (test_bit(hash, port->mc_filter)) | |
470 | macvlan_broadcast_enqueue(port, src, skb); | |
412ca155 | 471 | |
8a4eb573 | 472 | return RX_HANDLER_PASS; |
b863ceb7 PM |
473 | } |
474 | ||
79cf79ab | 475 | macvlan_forward_source(skb, port, eth->h_source); |
43c2d578 | 476 | if (macvlan_passthru(port)) |
233c7df0 JP |
477 | vlan = list_first_or_null_rcu(&port->vlans, |
478 | struct macvlan_dev, list); | |
eb06acdc SS |
479 | else |
480 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
dd6b9c2c | 481 | if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE) |
8a4eb573 | 482 | return RX_HANDLER_PASS; |
b863ceb7 PM |
483 | |
484 | dev = vlan->dev; | |
485 | if (unlikely(!(dev->flags & IFF_UP))) { | |
486 | kfree_skb(skb); | |
8a4eb573 | 487 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 488 | } |
a1e514c5 | 489 | len = skb->len + ETH_HLEN; |
b863ceb7 | 490 | skb = skb_share_check(skb, GFP_ATOMIC); |
d1dd9119 | 491 | if (!skb) { |
492 | ret = NET_RX_DROP; | |
493 | handle_res = RX_HANDLER_CONSUMED; | |
ba01877f | 494 | goto out; |
d1dd9119 | 495 | } |
b863ceb7 | 496 | |
e639b8d8 | 497 | *pskb = skb; |
b863ceb7 PM |
498 | skb->dev = dev; |
499 | skb->pkt_type = PACKET_HOST; | |
500 | ||
d1dd9119 | 501 | ret = NET_RX_SUCCESS; |
502 | handle_res = RX_HANDLER_ANOTHER; | |
ba01877f | 503 | out: |
4c979935 | 504 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
d1dd9119 | 505 | return handle_res; |
b863ceb7 PM |
506 | } |
507 | ||
618e1b74 AB |
508 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
509 | { | |
510 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
511 | const struct macvlan_port *port = vlan->port; | |
512 | const struct macvlan_dev *dest; | |
513 | ||
514 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
515 | const struct ethhdr *eth = (void *)skb->data; | |
516 | ||
517 | /* send to other bridge ports directly */ | |
518 | if (is_multicast_ether_addr(eth->h_dest)) { | |
519 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
520 | goto xmit_world; | |
521 | } | |
522 | ||
523 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
524 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 525 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 526 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
527 | |
528 | return NET_XMIT_SUCCESS; | |
529 | } | |
530 | } | |
618e1b74 | 531 | xmit_world: |
59b9997b | 532 | skb->dev = vlan->lowerdev; |
eadec877 AD |
533 | return dev_queue_xmit_accel(skb, |
534 | netdev_get_sb_channel(dev) ? dev : NULL); | |
618e1b74 AB |
535 | } |
536 | ||
688cea83 | 537 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
538 | { | |
539 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
540 | if (vlan->netpoll) | |
541 | netpoll_send_skb(vlan->netpoll, skb); | |
542 | #else | |
543 | BUG(); | |
544 | #endif | |
545 | return NETDEV_TX_OK; | |
546 | } | |
547 | ||
0db901bd | 548 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
549 | struct net_device *dev) | |
b863ceb7 | 550 | { |
81d4e91c | 551 | struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 PM |
552 | unsigned int len = skb->len; |
553 | int ret; | |
688cea83 | 554 | |
555 | if (unlikely(netpoll_tx_running(dev))) | |
556 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 557 | |
81d4e91c | 558 | ret = macvlan_queue_xmit(skb, dev); |
a6cc0cfa | 559 | |
2d6c9ffc | 560 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 561 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 562 | |
8ffab51b ED |
563 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
564 | u64_stats_update_begin(&pcpu_stats->syncp); | |
565 | pcpu_stats->tx_packets++; | |
566 | pcpu_stats->tx_bytes += len; | |
567 | u64_stats_update_end(&pcpu_stats->syncp); | |
568 | } else { | |
569 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
570 | } | |
cbbef5e1 | 571 | return ret; |
b863ceb7 PM |
572 | } |
573 | ||
574 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
575 | unsigned short type, const void *daddr, |
576 | const void *saddr, unsigned len) | |
b863ceb7 PM |
577 | { |
578 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
579 | struct net_device *lowerdev = vlan->lowerdev; | |
580 | ||
0c4e8581 SH |
581 | return dev_hard_header(skb, lowerdev, type, daddr, |
582 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
583 | } |
584 | ||
3b04ddde SH |
585 | static const struct header_ops macvlan_hard_header_ops = { |
586 | .create = macvlan_hard_header, | |
3b04ddde | 587 | .parse = eth_header_parse, |
3b04ddde SH |
588 | .cache = eth_header_cache, |
589 | .cache_update = eth_header_cache_update, | |
590 | }; | |
591 | ||
b863ceb7 PM |
592 | static int macvlan_open(struct net_device *dev) |
593 | { | |
594 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
595 | struct net_device *lowerdev = vlan->lowerdev; |
596 | int err; | |
597 | ||
43c2d578 | 598 | if (macvlan_passthru(vlan->port)) { |
78738141 MT |
599 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
600 | err = dev_set_promiscuity(lowerdev, 1); | |
601 | if (err < 0) | |
602 | goto out; | |
603 | } | |
eb06acdc SS |
604 | goto hash_add; |
605 | } | |
606 | ||
59f997b0 | 607 | err = -EADDRINUSE; |
7d775f63 AD |
608 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
609 | goto out; | |
610 | ||
611 | /* Attempt to populate accel_priv which is used to offload the L2 | |
612 | * forwarding requests for unicast packets. | |
613 | */ | |
81d4e91c | 614 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) |
7d775f63 | 615 | vlan->accel_priv = |
a6cc0cfa JF |
616 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); |
617 | ||
81d4e91c AD |
618 | /* If earlier attempt to offload failed, or accel_priv is not |
619 | * populated we must add the unicast address to the lower device. | |
620 | */ | |
621 | if (IS_ERR_OR_NULL(vlan->accel_priv)) { | |
622 | vlan->accel_priv = NULL; | |
623 | err = dev_uc_add(lowerdev, dev->dev_addr); | |
624 | if (err < 0) | |
625 | goto out; | |
a6cc0cfa JF |
626 | } |
627 | ||
b89fb7da WC |
628 | if (dev->flags & IFF_ALLMULTI) { |
629 | err = dev_set_allmulti(lowerdev, 1); | |
630 | if (err < 0) | |
631 | goto del_unicast; | |
632 | } | |
eb06acdc | 633 | |
efdbd2b3 VY |
634 | if (dev->flags & IFF_PROMISC) { |
635 | err = dev_set_promiscuity(lowerdev, 1); | |
636 | if (err < 0) | |
637 | goto clear_multi; | |
638 | } | |
639 | ||
eb06acdc | 640 | hash_add: |
f9ac30f0 | 641 | macvlan_hash_add(vlan); |
b863ceb7 | 642 | return 0; |
b89fb7da | 643 | |
efdbd2b3 | 644 | clear_multi: |
c3891fa2 GF |
645 | if (dev->flags & IFF_ALLMULTI) |
646 | dev_set_allmulti(lowerdev, -1); | |
b89fb7da | 647 | del_unicast: |
7d775f63 | 648 | if (vlan->accel_priv) { |
a6cc0cfa | 649 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
7d775f63 AD |
650 | vlan->accel_priv); |
651 | vlan->accel_priv = NULL; | |
81d4e91c AD |
652 | } else { |
653 | dev_uc_del(lowerdev, dev->dev_addr); | |
a6cc0cfa | 654 | } |
81d4e91c | 655 | out: |
b89fb7da | 656 | return err; |
b863ceb7 PM |
657 | } |
658 | ||
659 | static int macvlan_stop(struct net_device *dev) | |
660 | { | |
661 | struct macvlan_dev *vlan = netdev_priv(dev); | |
662 | struct net_device *lowerdev = vlan->lowerdev; | |
663 | ||
7d775f63 | 664 | if (vlan->accel_priv) { |
a6cc0cfa | 665 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
7d775f63 AD |
666 | vlan->accel_priv); |
667 | vlan->accel_priv = NULL; | |
a6cc0cfa JF |
668 | } |
669 | ||
df8ef8f3 JF |
670 | dev_uc_unsync(lowerdev, dev); |
671 | dev_mc_unsync(lowerdev, dev); | |
672 | ||
43c2d578 | 673 | if (macvlan_passthru(vlan->port)) { |
df8ef8f3 JF |
674 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
675 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
676 | goto hash_del; |
677 | } | |
678 | ||
b863ceb7 PM |
679 | if (dev->flags & IFF_ALLMULTI) |
680 | dev_set_allmulti(lowerdev, -1); | |
681 | ||
efdbd2b3 VY |
682 | if (dev->flags & IFF_PROMISC) |
683 | dev_set_promiscuity(lowerdev, -1); | |
684 | ||
a748ee24 | 685 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 686 | |
eb06acdc | 687 | hash_del: |
449f4544 | 688 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
689 | return 0; |
690 | } | |
691 | ||
e289fd28 | 692 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
693 | { |
694 | struct macvlan_dev *vlan = netdev_priv(dev); | |
695 | struct net_device *lowerdev = vlan->lowerdev; | |
18c8c54d | 696 | struct macvlan_port *port = vlan->port; |
ad5d20a6 PM |
697 | int err; |
698 | ||
f9ac30f0 EB |
699 | if (!(dev->flags & IFF_UP)) { |
700 | /* Just copy in the new address */ | |
e289fd28 | 701 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
702 | } else { |
703 | /* Rehash and update the device filters */ | |
e289fd28 | 704 | if (macvlan_addr_busy(vlan->port, addr)) |
59f997b0 | 705 | return -EADDRINUSE; |
ad5d20a6 | 706 | |
18c8c54d | 707 | if (!macvlan_passthru(port)) { |
e289fd28 | 708 | err = dev_uc_add(lowerdev, addr); |
709 | if (err) | |
710 | return err; | |
ad5d20a6 | 711 | |
e289fd28 | 712 | dev_uc_del(lowerdev, dev->dev_addr); |
713 | } | |
f9ac30f0 | 714 | |
e289fd28 | 715 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 716 | } |
18c8c54d VY |
717 | if (macvlan_passthru(port) && !macvlan_addr_change(port)) { |
718 | /* Since addr_change isn't set, we are here due to lower | |
719 | * device change. Save the lower-dev address so we can | |
720 | * restore it later. | |
721 | */ | |
722 | ether_addr_copy(vlan->port->perm_addr, | |
723 | lowerdev->dev_addr); | |
724 | } | |
725 | macvlan_clear_addr_change(port); | |
ad5d20a6 PM |
726 | return 0; |
727 | } | |
728 | ||
e289fd28 | 729 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
730 | { | |
731 | struct macvlan_dev *vlan = netdev_priv(dev); | |
732 | struct sockaddr *addr = p; | |
733 | ||
734 | if (!is_valid_ether_addr(addr->sa_data)) | |
735 | return -EADDRNOTAVAIL; | |
736 | ||
e26f43fa VY |
737 | /* If the addresses are the same, this is a no-op */ |
738 | if (ether_addr_equal(dev->dev_addr, addr->sa_data)) | |
739 | return 0; | |
740 | ||
e289fd28 | 741 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
18c8c54d | 742 | macvlan_set_addr_change(vlan->port); |
3a37a963 | 743 | return dev_set_mac_address(vlan->lowerdev, addr, NULL); |
e289fd28 | 744 | } |
745 | ||
59f997b0 MC |
746 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
747 | return -EADDRINUSE; | |
748 | ||
e289fd28 | 749 | return macvlan_sync_address(dev, addr->sa_data); |
750 | } | |
751 | ||
b863ceb7 PM |
752 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
753 | { | |
754 | struct macvlan_dev *vlan = netdev_priv(dev); | |
755 | struct net_device *lowerdev = vlan->lowerdev; | |
756 | ||
bbeb0ead PC |
757 | if (dev->flags & IFF_UP) { |
758 | if (change & IFF_ALLMULTI) | |
759 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
efdbd2b3 VY |
760 | if (change & IFF_PROMISC) |
761 | dev_set_promiscuity(lowerdev, | |
762 | dev->flags & IFF_PROMISC ? 1 : -1); | |
763 | ||
bbeb0ead | 764 | } |
b863ceb7 PM |
765 | } |
766 | ||
9c127a01 HX |
767 | static void macvlan_compute_filter(unsigned long *mc_filter, |
768 | struct net_device *dev, | |
769 | struct macvlan_dev *vlan) | |
b863ceb7 | 770 | { |
cd431e73 | 771 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
9c127a01 | 772 | bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 ED |
773 | } else { |
774 | struct netdev_hw_addr *ha; | |
775 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
776 | ||
777 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
778 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 779 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 780 | } |
d5270430 | 781 | |
3807ff58 | 782 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 783 | |
9c127a01 | 784 | bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 | 785 | } |
9c127a01 HX |
786 | } |
787 | ||
788 | static void macvlan_set_mac_lists(struct net_device *dev) | |
789 | { | |
790 | struct macvlan_dev *vlan = netdev_priv(dev); | |
791 | ||
792 | macvlan_compute_filter(vlan->mc_filter, dev, vlan); | |
793 | ||
df8ef8f3 | 794 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 | 795 | dev_mc_sync(vlan->lowerdev, dev); |
9c127a01 HX |
796 | |
797 | /* This is slightly inaccurate as we're including the subscription | |
798 | * list of vlan->lowerdev too. | |
799 | * | |
800 | * Bug alert: This only works if everyone has the same broadcast | |
801 | * address as lowerdev. As soon as someone changes theirs this | |
802 | * will break. | |
803 | * | |
804 | * However, this is already broken as when you change your broadcast | |
805 | * address we don't get called. | |
806 | * | |
807 | * The solution is to maintain a list of broadcast addresses like | |
808 | * we do for uc/mc, if you care. | |
809 | */ | |
810 | macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL); | |
b863ceb7 PM |
811 | } |
812 | ||
813 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
814 | { | |
815 | struct macvlan_dev *vlan = netdev_priv(dev); | |
816 | ||
91572088 | 817 | if (vlan->lowerdev->mtu < new_mtu) |
b863ceb7 PM |
818 | return -EINVAL; |
819 | dev->mtu = new_mtu; | |
820 | return 0; | |
821 | } | |
822 | ||
254c0a2b HL |
823 | static int macvlan_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
824 | { | |
825 | struct net_device *real_dev = macvlan_dev_real_dev(dev); | |
826 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
827 | struct ifreq ifrr; | |
828 | int err = -EOPNOTSUPP; | |
829 | ||
830 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
831 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
832 | ||
833 | switch (cmd) { | |
834 | case SIOCSHWTSTAMP: | |
6c2ea9eb HL |
835 | if (!net_eq(dev_net(dev), &init_net)) |
836 | break; | |
02596252 | 837 | /* fall through */ |
254c0a2b HL |
838 | case SIOCGHWTSTAMP: |
839 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) | |
840 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
841 | break; | |
842 | } | |
843 | ||
844 | if (!err) | |
845 | ifr->ifr_ifru = ifrr.ifr_ifru; | |
846 | ||
847 | return err; | |
848 | } | |
849 | ||
b863ceb7 PM |
850 | /* |
851 | * macvlan network devices have devices nesting below it and are a special | |
852 | * "super class" of normal network devices; split their locks off into a | |
853 | * separate class since they always nest. | |
854 | */ | |
cf508b12 | 855 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 856 | |
70957eae VY |
857 | #define ALWAYS_ON_OFFLOADS \ |
858 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \ | |
f21e5077 | 859 | NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL) |
8b4703e9 | 860 | |
70957eae VY |
861 | #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX) |
862 | ||
b863ceb7 | 863 | #define MACVLAN_FEATURES \ |
a188222b | 864 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
fb652fdf | 865 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \ |
8d13e670 | 866 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 867 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
868 | |
869 | #define MACVLAN_STATE_MASK \ | |
870 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
871 | ||
c674ac30 VY |
872 | static int macvlan_get_nest_level(struct net_device *dev) |
873 | { | |
874 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
875 | } | |
876 | ||
c773e847 DM |
877 | static void macvlan_set_lockdep_class(struct net_device *dev) |
878 | { | |
24ffd752 | 879 | netdev_lockdep_set_classes(dev); |
c674ac30 VY |
880 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
881 | &macvlan_netdev_addr_lock_key, | |
882 | macvlan_get_nest_level(dev)); | |
c773e847 DM |
883 | } |
884 | ||
b863ceb7 PM |
885 | static int macvlan_init(struct net_device *dev) |
886 | { | |
887 | struct macvlan_dev *vlan = netdev_priv(dev); | |
888 | const struct net_device *lowerdev = vlan->lowerdev; | |
30837960 | 889 | struct macvlan_port *port = vlan->port; |
b863ceb7 PM |
890 | |
891 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
892 | (lowerdev->state & MACVLAN_STATE_MASK); | |
893 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 894 | dev->features |= ALWAYS_ON_FEATURES; |
62dbe830 | 895 | dev->hw_features |= NETIF_F_LRO; |
081e83a7 | 896 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
70957eae | 897 | dev->vlan_features |= ALWAYS_ON_OFFLOADS; |
f21e5077 | 898 | dev->hw_enc_features |= dev->features; |
8c2acc53 | 899 | dev->gso_max_size = lowerdev->gso_max_size; |
f6773c5e | 900 | dev->gso_max_segs = lowerdev->gso_max_segs; |
ef5c8996 | 901 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 902 | |
c773e847 DM |
903 | macvlan_set_lockdep_class(dev); |
904 | ||
1c213bd2 | 905 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 906 | if (!vlan->pcpu_stats) |
fccaf710 ED |
907 | return -ENOMEM; |
908 | ||
30837960 FR |
909 | port->count += 1; |
910 | ||
b863ceb7 PM |
911 | return 0; |
912 | } | |
913 | ||
fccaf710 ED |
914 | static void macvlan_uninit(struct net_device *dev) |
915 | { | |
916 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 917 | struct macvlan_port *port = vlan->port; |
fccaf710 | 918 | |
8ffab51b | 919 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 920 | |
79cf79ab | 921 | macvlan_flush_sources(port, vlan); |
5e3c516b DM |
922 | port->count -= 1; |
923 | if (!port->count) | |
d5cd9244 | 924 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
925 | } |
926 | ||
bc1f4470 | 927 | static void macvlan_dev_get_stats64(struct net_device *dev, |
928 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 929 | { |
fccaf710 ED |
930 | struct macvlan_dev *vlan = netdev_priv(dev); |
931 | ||
8ffab51b | 932 | if (vlan->pcpu_stats) { |
cdf3e274 | 933 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
934 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
935 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 936 | unsigned int start; |
fccaf710 ED |
937 | int i; |
938 | ||
939 | for_each_possible_cpu(i) { | |
8ffab51b | 940 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 941 | do { |
57a7744e | 942 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
943 | rx_packets = p->rx_packets; |
944 | rx_bytes = p->rx_bytes; | |
945 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
946 | tx_packets = p->tx_packets; |
947 | tx_bytes = p->tx_bytes; | |
57a7744e | 948 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
949 | |
950 | stats->rx_packets += rx_packets; | |
951 | stats->rx_bytes += rx_bytes; | |
952 | stats->multicast += rx_multicast; | |
953 | stats->tx_packets += tx_packets; | |
954 | stats->tx_bytes += tx_bytes; | |
955 | /* rx_errors & tx_dropped are u32, updated | |
956 | * without syncp protection. | |
957 | */ | |
958 | rx_errors += p->rx_errors; | |
959 | tx_dropped += p->tx_dropped; | |
fccaf710 | 960 | } |
8ffab51b ED |
961 | stats->rx_errors = rx_errors; |
962 | stats->rx_dropped = rx_errors; | |
963 | stats->tx_dropped = tx_dropped; | |
fccaf710 | 964 | } |
fccaf710 ED |
965 | } |
966 | ||
8e586137 | 967 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 968 | __be16 proto, u16 vid) |
8d13e670 JF |
969 | { |
970 | struct macvlan_dev *vlan = netdev_priv(dev); | |
971 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 972 | |
80d5c368 | 973 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
974 | } |
975 | ||
8e586137 | 976 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 977 | __be16 proto, u16 vid) |
8d13e670 JF |
978 | { |
979 | struct macvlan_dev *vlan = netdev_priv(dev); | |
980 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 981 | |
80d5c368 | 982 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 983 | return 0; |
8d13e670 JF |
984 | } |
985 | ||
edc7d573 | 986 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 987 | struct net_device *dev, |
f6f6424b | 988 | const unsigned char *addr, u16 vid, |
87b0984e PM |
989 | u16 flags, |
990 | struct netlink_ext_ack *extack) | |
df8ef8f3 JF |
991 | { |
992 | struct macvlan_dev *vlan = netdev_priv(dev); | |
993 | int err = -EINVAL; | |
994 | ||
8a50f11c VY |
995 | /* Support unicast filter only on passthru devices. |
996 | * Multicast filter should be allowed on all devices. | |
997 | */ | |
43c2d578 | 998 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
999 | return -EOPNOTSUPP; |
1000 | ||
ab2cfbb2 TR |
1001 | if (flags & NLM_F_REPLACE) |
1002 | return -EOPNOTSUPP; | |
1003 | ||
df8ef8f3 JF |
1004 | if (is_unicast_ether_addr(addr)) |
1005 | err = dev_uc_add_excl(dev, addr); | |
1006 | else if (is_multicast_ether_addr(addr)) | |
1007 | err = dev_mc_add_excl(dev, addr); | |
1008 | ||
1009 | return err; | |
1010 | } | |
1011 | ||
1690be63 | 1012 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 1013 | struct net_device *dev, |
f6f6424b | 1014 | const unsigned char *addr, u16 vid) |
df8ef8f3 JF |
1015 | { |
1016 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1017 | int err = -EINVAL; | |
1018 | ||
8a50f11c VY |
1019 | /* Support unicast filter only on passthru devices. |
1020 | * Multicast filter should be allowed on all devices. | |
1021 | */ | |
43c2d578 | 1022 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
1023 | return -EOPNOTSUPP; |
1024 | ||
1025 | if (is_unicast_ether_addr(addr)) | |
1026 | err = dev_uc_del(dev, addr); | |
1027 | else if (is_multicast_ether_addr(addr)) | |
1028 | err = dev_mc_del(dev, addr); | |
1029 | ||
1030 | return err; | |
1031 | } | |
1032 | ||
b863ceb7 PM |
1033 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
1034 | struct ethtool_drvinfo *drvinfo) | |
1035 | { | |
7826d43f JP |
1036 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
1037 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
1038 | } |
1039 | ||
85f95819 DD |
1040 | static int macvlan_ethtool_get_link_ksettings(struct net_device *dev, |
1041 | struct ethtool_link_ksettings *cmd) | |
9edb8bb6 SH |
1042 | { |
1043 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 | 1044 | |
85f95819 | 1045 | return __ethtool_get_link_ksettings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
1046 | } |
1047 | ||
254c0a2b HL |
1048 | static int macvlan_ethtool_get_ts_info(struct net_device *dev, |
1049 | struct ethtool_ts_info *info) | |
1050 | { | |
1051 | struct net_device *real_dev = macvlan_dev_real_dev(dev); | |
1052 | const struct ethtool_ops *ops = real_dev->ethtool_ops; | |
1053 | struct phy_device *phydev = real_dev->phydev; | |
1054 | ||
1055 | if (phydev && phydev->drv && phydev->drv->ts_info) { | |
1056 | return phydev->drv->ts_info(phydev, info); | |
1057 | } else if (ops->get_ts_info) { | |
1058 | return ops->get_ts_info(real_dev, info); | |
1059 | } else { | |
1060 | info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | | |
1061 | SOF_TIMESTAMPING_SOFTWARE; | |
1062 | info->phc_index = -1; | |
1063 | } | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
2be5c767 VY |
1068 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
1069 | netdev_features_t features) | |
1070 | { | |
1071 | struct macvlan_dev *vlan = netdev_priv(dev); | |
62dbe830 | 1072 | netdev_features_t lowerdev_features = vlan->lowerdev->features; |
797f87f8 | 1073 | netdev_features_t mask; |
2be5c767 | 1074 | |
797f87f8 FW |
1075 | features |= NETIF_F_ALL_FOR_ALL; |
1076 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
1077 | mask = features; | |
1078 | ||
62dbe830 MK |
1079 | lowerdev_features &= (features | ~NETIF_F_LRO); |
1080 | features = netdev_increment_features(lowerdev_features, features, mask); | |
8b4703e9 | 1081 | features |= ALWAYS_ON_FEATURES; |
13fbcc8d | 1082 | features &= (ALWAYS_ON_FEATURES | MACVLAN_FEATURES); |
797f87f8 FW |
1083 | |
1084 | return features; | |
2be5c767 VY |
1085 | } |
1086 | ||
688cea83 | 1087 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1088 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
1089 | { | |
1090 | return; | |
1091 | } | |
1092 | ||
1093 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
1094 | { | |
1095 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1096 | struct net_device *real_dev = vlan->lowerdev; | |
1097 | struct netpoll *netpoll; | |
1098 | int err = 0; | |
1099 | ||
1100 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
1101 | err = -ENOMEM; | |
1102 | if (!netpoll) | |
1103 | goto out; | |
1104 | ||
1105 | err = __netpoll_setup(netpoll, real_dev); | |
1106 | if (err) { | |
1107 | kfree(netpoll); | |
1108 | goto out; | |
1109 | } | |
1110 | ||
1111 | vlan->netpoll = netpoll; | |
1112 | ||
1113 | out: | |
1114 | return err; | |
1115 | } | |
1116 | ||
1117 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
1118 | { | |
1119 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1120 | struct netpoll *netpoll = vlan->netpoll; | |
1121 | ||
1122 | if (!netpoll) | |
1123 | return; | |
1124 | ||
1125 | vlan->netpoll = NULL; | |
1126 | ||
c9fbd71f | 1127 | __netpoll_free(netpoll); |
688cea83 | 1128 | } |
1129 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1130 | ||
ef5fa6bc ND |
1131 | static int macvlan_dev_get_iflink(const struct net_device *dev) |
1132 | { | |
1133 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1134 | ||
1135 | return vlan->lowerdev->ifindex; | |
1136 | } | |
1137 | ||
b863ceb7 PM |
1138 | static const struct ethtool_ops macvlan_ethtool_ops = { |
1139 | .get_link = ethtool_op_get_link, | |
85f95819 | 1140 | .get_link_ksettings = macvlan_ethtool_get_link_ksettings, |
b863ceb7 | 1141 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
254c0a2b | 1142 | .get_ts_info = macvlan_ethtool_get_ts_info, |
b863ceb7 PM |
1143 | }; |
1144 | ||
54a30c97 SH |
1145 | static const struct net_device_ops macvlan_netdev_ops = { |
1146 | .ndo_init = macvlan_init, | |
fccaf710 | 1147 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
1148 | .ndo_open = macvlan_open, |
1149 | .ndo_stop = macvlan_stop, | |
00829823 | 1150 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 1151 | .ndo_change_mtu = macvlan_change_mtu, |
254c0a2b | 1152 | .ndo_do_ioctl = macvlan_do_ioctl, |
2be5c767 | 1153 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
1154 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
1155 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 1156 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 1157 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 1158 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
1159 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
1160 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
1161 | .ndo_fdb_add = macvlan_fdb_add, |
1162 | .ndo_fdb_del = macvlan_fdb_del, | |
1163 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 1164 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
688cea83 | 1165 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1166 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
1167 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
1168 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
1169 | #endif | |
ef5fa6bc | 1170 | .ndo_get_iflink = macvlan_dev_get_iflink, |
f56e67b5 | 1171 | .ndo_features_check = passthru_features_check, |
2e8b4ba6 | 1172 | .ndo_change_proto_down = dev_change_proto_down_generic, |
54a30c97 SH |
1173 | }; |
1174 | ||
8a35747a | 1175 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
1176 | { |
1177 | ether_setup(dev); | |
1178 | ||
91572088 JW |
1179 | dev->min_mtu = 0; |
1180 | dev->max_mtu = ETH_MAX_MTU; | |
02875878 ED |
1181 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1182 | netif_keep_dst(dev); | |
87ab7f6f | 1183 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 1184 | dev->netdev_ops = &macvlan_netdev_ops; |
cf124db5 | 1185 | dev->needs_free_netdev = true; |
71740129 | 1186 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 1187 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
1188 | } |
1189 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
1190 | ||
1191 | static void macvlan_setup(struct net_device *dev) | |
1192 | { | |
1193 | macvlan_common_setup(dev); | |
7009212b | 1194 | dev->priv_flags |= IFF_NO_QUEUE; |
b863ceb7 PM |
1195 | } |
1196 | ||
1197 | static int macvlan_port_create(struct net_device *dev) | |
1198 | { | |
1199 | struct macvlan_port *port; | |
1200 | unsigned int i; | |
ab95bfe0 | 1201 | int err; |
b863ceb7 PM |
1202 | |
1203 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
1204 | return -EINVAL; | |
1205 | ||
322dc6e0 | 1206 | if (netdev_is_rx_handler_busy(dev)) |
d6b00fec MB |
1207 | return -EBUSY; |
1208 | ||
b863ceb7 PM |
1209 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1210 | if (port == NULL) | |
1211 | return -ENOMEM; | |
1212 | ||
1213 | port->dev = dev; | |
18c8c54d | 1214 | ether_addr_copy(port->perm_addr, dev->dev_addr); |
b863ceb7 PM |
1215 | INIT_LIST_HEAD(&port->vlans); |
1216 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
1217 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
79cf79ab MB |
1218 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
1219 | INIT_HLIST_HEAD(&port->vlan_source_hash[i]); | |
ab95bfe0 | 1220 | |
412ca155 HX |
1221 | skb_queue_head_init(&port->bc_queue); |
1222 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
1223 | ||
a35e2c1b JP |
1224 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
1225 | if (err) | |
ab95bfe0 | 1226 | kfree(port); |
d9351561 ED |
1227 | else |
1228 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 1229 | return err; |
b863ceb7 PM |
1230 | } |
1231 | ||
1232 | static void macvlan_port_destroy(struct net_device *dev) | |
1233 | { | |
e052f7e6 | 1234 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
f6478218 | 1235 | struct sk_buff *skb; |
b863ceb7 | 1236 | |
a35e2c1b | 1237 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 1238 | netdev_rx_handler_unregister(dev); |
fe0ca732 ED |
1239 | |
1240 | /* After this point, no packet can schedule bc_work anymore, | |
1241 | * but we need to cancel it and purge left skbs if any. | |
1242 | */ | |
1243 | cancel_work_sync(&port->bc_work); | |
f6478218 HX |
1244 | |
1245 | while ((skb = __skb_dequeue(&port->bc_queue))) { | |
1246 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
1247 | ||
1248 | if (src) | |
1249 | dev_put(src->dev); | |
1250 | ||
1251 | kfree_skb(skb); | |
1252 | } | |
fe0ca732 | 1253 | |
18c8c54d VY |
1254 | /* If the lower device address has been changed by passthru |
1255 | * macvlan, put it back. | |
1256 | */ | |
1257 | if (macvlan_passthru(port) && | |
1258 | !ether_addr_equal(port->dev->dev_addr, port->perm_addr)) { | |
1259 | struct sockaddr sa; | |
1260 | ||
1261 | sa.sa_family = port->dev->type; | |
1262 | memcpy(&sa.sa_data, port->perm_addr, port->dev->addr_len); | |
3a37a963 | 1263 | dev_set_mac_address(port->dev, &sa, NULL); |
18c8c54d VY |
1264 | } |
1265 | ||
a1f5315c | 1266 | kfree(port); |
b863ceb7 PM |
1267 | } |
1268 | ||
a8b8a889 MS |
1269 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], |
1270 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1271 | { |
1272 | if (tb[IFLA_ADDRESS]) { | |
1273 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1274 | return -EINVAL; | |
1275 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1276 | return -EADDRNOTAVAIL; | |
1277 | } | |
27c0b1a8 | 1278 | |
07850a4f ZS |
1279 | if (!data) |
1280 | return 0; | |
1281 | ||
1282 | if (data[IFLA_MACVLAN_FLAGS] && | |
15127478 MT |
1283 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) |
1284 | return -EINVAL; | |
1285 | ||
07850a4f | 1286 | if (data[IFLA_MACVLAN_MODE]) { |
27c0b1a8 AB |
1287 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { |
1288 | case MACVLAN_MODE_PRIVATE: | |
1289 | case MACVLAN_MODE_VEPA: | |
1290 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 1291 | case MACVLAN_MODE_PASSTHRU: |
79cf79ab MB |
1292 | case MACVLAN_MODE_SOURCE: |
1293 | break; | |
1294 | default: | |
1295 | return -EINVAL; | |
1296 | } | |
1297 | } | |
1298 | ||
07850a4f | 1299 | if (data[IFLA_MACVLAN_MACADDR_MODE]) { |
79cf79ab MB |
1300 | switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { |
1301 | case MACVLAN_MACADDR_ADD: | |
1302 | case MACVLAN_MACADDR_DEL: | |
1303 | case MACVLAN_MACADDR_FLUSH: | |
1304 | case MACVLAN_MACADDR_SET: | |
27c0b1a8 AB |
1305 | break; |
1306 | default: | |
1307 | return -EINVAL; | |
1308 | } | |
1309 | } | |
79cf79ab | 1310 | |
07850a4f | 1311 | if (data[IFLA_MACVLAN_MACADDR]) { |
79cf79ab MB |
1312 | if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) |
1313 | return -EINVAL; | |
1314 | ||
1315 | if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) | |
1316 | return -EADDRNOTAVAIL; | |
1317 | } | |
1318 | ||
07850a4f | 1319 | if (data[IFLA_MACVLAN_MACADDR_COUNT]) |
79cf79ab MB |
1320 | return -EINVAL; |
1321 | ||
1322 | return 0; | |
1323 | } | |
1324 | ||
1325 | /** | |
1326 | * reconfigure list of remote source mac address | |
1327 | * (only for macvlan devices in source mode) | |
1328 | * Note regarding alignment: all netlink data is aligned to 4 Byte, which | |
1329 | * suffices for both ether_addr_copy and ether_addr_equal_64bits usage. | |
1330 | */ | |
1331 | static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, | |
1332 | struct nlattr *data[]) | |
1333 | { | |
1334 | char *addr = NULL; | |
1335 | int ret, rem, len; | |
1336 | struct nlattr *nla, *head; | |
1337 | struct macvlan_source_entry *entry; | |
1338 | ||
1339 | if (data[IFLA_MACVLAN_MACADDR]) | |
1340 | addr = nla_data(data[IFLA_MACVLAN_MACADDR]); | |
1341 | ||
1342 | if (mode == MACVLAN_MACADDR_ADD) { | |
1343 | if (!addr) | |
1344 | return -EINVAL; | |
1345 | ||
1346 | return macvlan_hash_add_source(vlan, addr); | |
1347 | ||
1348 | } else if (mode == MACVLAN_MACADDR_DEL) { | |
1349 | if (!addr) | |
1350 | return -EINVAL; | |
1351 | ||
1352 | entry = macvlan_hash_lookup_source(vlan, addr); | |
1353 | if (entry) { | |
1354 | macvlan_hash_del_source(entry); | |
1355 | vlan->macaddr_count--; | |
1356 | } | |
1357 | } else if (mode == MACVLAN_MACADDR_FLUSH) { | |
1358 | macvlan_flush_sources(vlan->port, vlan); | |
1359 | } else if (mode == MACVLAN_MACADDR_SET) { | |
1360 | macvlan_flush_sources(vlan->port, vlan); | |
1361 | ||
1362 | if (addr) { | |
1363 | ret = macvlan_hash_add_source(vlan, addr); | |
1364 | if (ret) | |
1365 | return ret; | |
1366 | } | |
1367 | ||
1368 | if (!data || !data[IFLA_MACVLAN_MACADDR_DATA]) | |
1369 | return 0; | |
1370 | ||
1371 | head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1372 | len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1373 | ||
1374 | nla_for_each_attr(nla, head, len, rem) { | |
1375 | if (nla_type(nla) != IFLA_MACVLAN_MACADDR || | |
1376 | nla_len(nla) != ETH_ALEN) | |
1377 | continue; | |
1378 | ||
1379 | addr = nla_data(nla); | |
1380 | ret = macvlan_hash_add_source(vlan, addr); | |
1381 | if (ret) | |
1382 | return ret; | |
1383 | } | |
1384 | } else { | |
1385 | return -EINVAL; | |
1386 | } | |
1387 | ||
b863ceb7 PM |
1388 | return 0; |
1389 | } | |
1390 | ||
fc0663d6 | 1391 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
42ab19ee DA |
1392 | struct nlattr *tb[], struct nlattr *data[], |
1393 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1394 | { |
1395 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1396 | struct macvlan_port *port; | |
1397 | struct net_device *lowerdev; | |
1398 | int err; | |
79cf79ab | 1399 | int macmode; |
aa5fd0fb | 1400 | bool create = false; |
b863ceb7 PM |
1401 | |
1402 | if (!tb[IFLA_LINK]) | |
1403 | return -EINVAL; | |
1404 | ||
81adee47 | 1405 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
1406 | if (lowerdev == NULL) |
1407 | return -ENODEV; | |
1408 | ||
d70f2cf5 | 1409 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 1410 | * the real device as the lowerdev. |
a6ca5f1d | 1411 | */ |
d70f2cf5 KW |
1412 | if (netif_is_macvlan(lowerdev)) |
1413 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 1414 | |
b863ceb7 PM |
1415 | if (!tb[IFLA_MTU]) |
1416 | dev->mtu = lowerdev->mtu; | |
1417 | else if (dev->mtu > lowerdev->mtu) | |
1418 | return -EINVAL; | |
1419 | ||
91572088 JW |
1420 | /* MTU range: 68 - lowerdev->max_mtu */ |
1421 | dev->min_mtu = ETH_MIN_MTU; | |
1422 | dev->max_mtu = lowerdev->max_mtu; | |
1423 | ||
b863ceb7 | 1424 | if (!tb[IFLA_ADDRESS]) |
7ce5d222 | 1425 | eth_hw_addr_random(dev); |
b863ceb7 | 1426 | |
913564fb | 1427 | if (!netif_is_macvlan_port(lowerdev)) { |
b863ceb7 PM |
1428 | err = macvlan_port_create(lowerdev); |
1429 | if (err < 0) | |
1430 | return err; | |
aa5fd0fb | 1431 | create = true; |
b863ceb7 | 1432 | } |
e052f7e6 | 1433 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1434 | |
eb06acdc | 1435 | /* Only 1 macvlan device can be created in passthru mode */ |
43c2d578 | 1436 | if (macvlan_passthru(port)) { |
aa5fd0fb GF |
1437 | /* The macvlan port must be not created this time, |
1438 | * still goto destroy_macvlan_port for readability. | |
1439 | */ | |
1440 | err = -EINVAL; | |
1441 | goto destroy_macvlan_port; | |
1442 | } | |
eb06acdc | 1443 | |
b863ceb7 PM |
1444 | vlan->lowerdev = lowerdev; |
1445 | vlan->dev = dev; | |
1446 | vlan->port = port; | |
2be5c767 | 1447 | vlan->set_features = MACVLAN_FEATURES; |
952fcfd0 | 1448 | vlan->nest_level = dev_get_nest_level(lowerdev) + 1; |
b863ceb7 | 1449 | |
27c0b1a8 AB |
1450 | vlan->mode = MACVLAN_MODE_VEPA; |
1451 | if (data && data[IFLA_MACVLAN_MODE]) | |
1452 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1453 | ||
df8ef8f3 JF |
1454 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1455 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1456 | ||
eb06acdc | 1457 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
aa5fd0fb GF |
1458 | if (port->count) { |
1459 | err = -EINVAL; | |
1460 | goto destroy_macvlan_port; | |
1461 | } | |
43c2d578 | 1462 | macvlan_set_passthru(port); |
8b98604e | 1463 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1464 | } |
1465 | ||
79cf79ab | 1466 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
aa5fd0fb GF |
1467 | if (vlan->mode != MACVLAN_MODE_SOURCE) { |
1468 | err = -EINVAL; | |
1469 | goto destroy_macvlan_port; | |
1470 | } | |
79cf79ab MB |
1471 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); |
1472 | err = macvlan_changelink_sources(vlan, macmode, data); | |
1473 | if (err) | |
aa5fd0fb | 1474 | goto destroy_macvlan_port; |
79cf79ab MB |
1475 | } |
1476 | ||
47d4ab91 JF |
1477 | err = register_netdevice(dev); |
1478 | if (err < 0) | |
aa5fd0fb | 1479 | goto destroy_macvlan_port; |
47d4ab91 | 1480 | |
a6cc0cfa | 1481 | dev->priv_flags |= IFF_MACVLAN; |
42ab19ee | 1482 | err = netdev_upper_dev_link(lowerdev, dev, extack); |
7cd43db7 | 1483 | if (err) |
da37705c | 1484 | goto unregister_netdev; |
b863ceb7 | 1485 | |
233c7df0 | 1486 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1487 | netif_stacked_transfer_operstate(lowerdev, dev); |
de7d244d | 1488 | linkwatch_fire_event(dev); |
f16d3d57 | 1489 | |
b863ceb7 | 1490 | return 0; |
f16d3d57 | 1491 | |
da37705c | 1492 | unregister_netdev: |
d02fd6e7 | 1493 | /* macvlan_uninit would free the macvlan port */ |
da37705c | 1494 | unregister_netdevice(dev); |
d02fd6e7 | 1495 | return err; |
aa5fd0fb | 1496 | destroy_macvlan_port: |
d02fd6e7 GF |
1497 | /* the macvlan port may be freed by macvlan_uninit when fail to register. |
1498 | * so we destroy the macvlan port only when it's valid. | |
1499 | */ | |
4e14bf42 | 1500 | if (create && macvlan_port_get_rtnl(lowerdev)) |
aa5fd0fb | 1501 | macvlan_port_destroy(port->dev); |
f16d3d57 | 1502 | return err; |
b863ceb7 | 1503 | } |
fc0663d6 | 1504 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1505 | |
fc0663d6 | 1506 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
1507 | struct nlattr *tb[], struct nlattr *data[], |
1508 | struct netlink_ext_ack *extack) | |
fc0663d6 | 1509 | { |
42ab19ee | 1510 | return macvlan_common_newlink(src_net, dev, tb, data, extack); |
fc0663d6 AB |
1511 | } |
1512 | ||
1513 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1514 | { |
1515 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1516 | |
79cf79ab MB |
1517 | if (vlan->mode == MACVLAN_MODE_SOURCE) |
1518 | macvlan_flush_sources(vlan->port, vlan); | |
233c7df0 | 1519 | list_del_rcu(&vlan->list); |
23289a37 | 1520 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1521 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1522 | } |
fc0663d6 | 1523 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1524 | |
27c0b1a8 | 1525 | static int macvlan_changelink(struct net_device *dev, |
ad744b22 MS |
1526 | struct nlattr *tb[], struct nlattr *data[], |
1527 | struct netlink_ext_ack *extack) | |
27c0b1a8 AB |
1528 | { |
1529 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1530 | enum macvlan_mode mode; |
1531 | bool set_mode = false; | |
79cf79ab MB |
1532 | enum macvlan_macaddr_mode macmode; |
1533 | int ret; | |
266e8347 MT |
1534 | |
1535 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1536 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1537 | set_mode = true; | |
1538 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1539 | /* Passthrough mode can't be set or cleared dynamically */ | |
1540 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1541 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1542 | return -EINVAL; | |
79cf79ab MB |
1543 | if (vlan->mode == MACVLAN_MODE_SOURCE && |
1544 | vlan->mode != mode) | |
1545 | macvlan_flush_sources(vlan->port, vlan); | |
266e8347 | 1546 | } |
99ffc3e7 | 1547 | |
df8ef8f3 JF |
1548 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1549 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1550 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
43c2d578 | 1551 | if (macvlan_passthru(vlan->port) && promisc) { |
99ffc3e7 MT |
1552 | int err; |
1553 | ||
1554 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1555 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1556 | else | |
1557 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1558 | if (err < 0) | |
1559 | return err; | |
1560 | } | |
df8ef8f3 JF |
1561 | vlan->flags = flags; |
1562 | } | |
266e8347 MT |
1563 | if (set_mode) |
1564 | vlan->mode = mode; | |
79cf79ab MB |
1565 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1566 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1567 | return -EINVAL; | |
1568 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1569 | ret = macvlan_changelink_sources(vlan, macmode, data); | |
1570 | if (ret) | |
1571 | return ret; | |
1572 | } | |
27c0b1a8 AB |
1573 | return 0; |
1574 | } | |
1575 | ||
79cf79ab MB |
1576 | static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan) |
1577 | { | |
1578 | if (vlan->macaddr_count == 0) | |
1579 | return 0; | |
1580 | return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */ | |
1581 | + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN); | |
1582 | } | |
1583 | ||
27c0b1a8 AB |
1584 | static size_t macvlan_get_size(const struct net_device *dev) |
1585 | { | |
79cf79ab MB |
1586 | struct macvlan_dev *vlan = netdev_priv(dev); |
1587 | ||
01fe944f ED |
1588 | return (0 |
1589 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1590 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
79cf79ab MB |
1591 | + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */ |
1592 | + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */ | |
01fe944f | 1593 | ); |
27c0b1a8 AB |
1594 | } |
1595 | ||
79cf79ab MB |
1596 | static int macvlan_fill_info_macaddr(struct sk_buff *skb, |
1597 | const struct macvlan_dev *vlan, | |
1598 | const int i) | |
1599 | { | |
1600 | struct hlist_head *h = &vlan->port->vlan_source_hash[i]; | |
1601 | struct macvlan_source_entry *entry; | |
1602 | ||
1603 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
1604 | if (entry->vlan != vlan) | |
1605 | continue; | |
1606 | if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) | |
1607 | return 1; | |
1608 | } | |
1609 | return 0; | |
1610 | } | |
1611 | ||
27c0b1a8 AB |
1612 | static int macvlan_fill_info(struct sk_buff *skb, |
1613 | const struct net_device *dev) | |
1614 | { | |
1615 | struct macvlan_dev *vlan = netdev_priv(dev); | |
79cf79ab MB |
1616 | int i; |
1617 | struct nlattr *nest; | |
27c0b1a8 | 1618 | |
ead9a76c DM |
1619 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1620 | goto nla_put_failure; | |
df8ef8f3 JF |
1621 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1622 | goto nla_put_failure; | |
79cf79ab MB |
1623 | if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count)) |
1624 | goto nla_put_failure; | |
1625 | if (vlan->macaddr_count > 0) { | |
ae0be8de | 1626 | nest = nla_nest_start_noflag(skb, IFLA_MACVLAN_MACADDR_DATA); |
79cf79ab MB |
1627 | if (nest == NULL) |
1628 | goto nla_put_failure; | |
1629 | ||
1630 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
1631 | if (macvlan_fill_info_macaddr(skb, vlan, i)) | |
1632 | goto nla_put_failure; | |
1633 | } | |
1634 | nla_nest_end(skb, nest); | |
1635 | } | |
27c0b1a8 AB |
1636 | return 0; |
1637 | ||
1638 | nla_put_failure: | |
1639 | return -EMSGSIZE; | |
1640 | } | |
1641 | ||
1642 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1643 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1644 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
79cf79ab MB |
1645 | [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, |
1646 | [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
1647 | [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, | |
1648 | [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 }, | |
27c0b1a8 AB |
1649 | }; |
1650 | ||
fc0663d6 AB |
1651 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1652 | { | |
1653 | /* common fields */ | |
fc0663d6 AB |
1654 | ops->validate = macvlan_validate; |
1655 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1656 | ops->policy = macvlan_policy; | |
1657 | ops->changelink = macvlan_changelink; | |
1658 | ops->get_size = macvlan_get_size; | |
1659 | ops->fill_info = macvlan_fill_info; | |
1660 | ||
1661 | return rtnl_link_register(ops); | |
1662 | }; | |
1663 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1664 | ||
eaca400f ND |
1665 | static struct net *macvlan_get_link_net(const struct net_device *dev) |
1666 | { | |
1667 | return dev_net(macvlan_dev_real_dev(dev)); | |
1668 | } | |
1669 | ||
fc0663d6 | 1670 | static struct rtnl_link_ops macvlan_link_ops = { |
b863ceb7 | 1671 | .kind = "macvlan", |
8a35747a | 1672 | .setup = macvlan_setup, |
b863ceb7 PM |
1673 | .newlink = macvlan_newlink, |
1674 | .dellink = macvlan_dellink, | |
eaca400f | 1675 | .get_link_net = macvlan_get_link_net, |
6fe3faf8 | 1676 | .priv_size = sizeof(struct macvlan_dev), |
b863ceb7 PM |
1677 | }; |
1678 | ||
1679 | static int macvlan_device_event(struct notifier_block *unused, | |
1680 | unsigned long event, void *ptr) | |
1681 | { | |
351638e7 | 1682 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1683 | struct macvlan_dev *vlan, *next; |
1684 | struct macvlan_port *port; | |
226bd341 | 1685 | LIST_HEAD(list_kill); |
b863ceb7 | 1686 | |
913564fb | 1687 | if (!netif_is_macvlan_port(dev)) |
b863ceb7 PM |
1688 | return NOTIFY_DONE; |
1689 | ||
e052f7e6 | 1690 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1691 | |
b863ceb7 | 1692 | switch (event) { |
de7d244d | 1693 | case NETDEV_UP: |
80fd2d6c | 1694 | case NETDEV_DOWN: |
b863ceb7 PM |
1695 | case NETDEV_CHANGE: |
1696 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1697 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1698 | vlan->dev); | |
b863ceb7 PM |
1699 | break; |
1700 | case NETDEV_FEAT_CHANGE: | |
1701 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1702 | vlan->dev->gso_max_size = dev->gso_max_size; |
f6773c5e | 1703 | vlan->dev->gso_max_segs = dev->gso_max_segs; |
797f87f8 | 1704 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1705 | } |
1706 | break; | |
3763e7ef | 1707 | case NETDEV_CHANGEMTU: |
1708 | list_for_each_entry(vlan, &port->vlans, list) { | |
1709 | if (vlan->dev->mtu <= dev->mtu) | |
1710 | continue; | |
1711 | dev_set_mtu(vlan->dev, dev->mtu); | |
1712 | } | |
e289fd28 | 1713 | break; |
1714 | case NETDEV_CHANGEADDR: | |
43c2d578 | 1715 | if (!macvlan_passthru(port)) |
e289fd28 | 1716 | return NOTIFY_DONE; |
1717 | ||
1718 | vlan = list_first_entry_or_null(&port->vlans, | |
1719 | struct macvlan_dev, | |
1720 | list); | |
1721 | ||
1722 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1723 | return NOTIFY_BAD; | |
1724 | ||
3763e7ef | 1725 | break; |
b863ceb7 | 1726 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1727 | /* twiddle thumbs on netns device moves */ |
1728 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1729 | break; | |
1730 | ||
b863ceb7 | 1731 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1732 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1733 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1734 | break; |
1c01fe14 JP |
1735 | case NETDEV_PRE_TYPE_CHANGE: |
1736 | /* Forbid underlaying device to change its type. */ | |
1737 | return NOTIFY_BAD; | |
4c991255 VY |
1738 | |
1739 | case NETDEV_NOTIFY_PEERS: | |
1740 | case NETDEV_BONDING_FAILOVER: | |
1741 | case NETDEV_RESEND_IGMP: | |
1742 | /* Propagate to all vlans */ | |
1743 | list_for_each_entry(vlan, &port->vlans, list) | |
1744 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1745 | } |
1746 | return NOTIFY_DONE; | |
1747 | } | |
1748 | ||
1749 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1750 | .notifier_call = macvlan_device_event, | |
1751 | }; | |
1752 | ||
1753 | static int __init macvlan_init_module(void) | |
1754 | { | |
1755 | int err; | |
1756 | ||
1757 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1758 | |
fc0663d6 | 1759 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1760 | if (err < 0) |
1761 | goto err1; | |
1762 | return 0; | |
1763 | err1: | |
b863ceb7 PM |
1764 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1765 | return err; | |
1766 | } | |
1767 | ||
1768 | static void __exit macvlan_cleanup_module(void) | |
1769 | { | |
1770 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1771 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1772 | } | |
1773 | ||
1774 | module_init(macvlan_init_module); | |
1775 | module_exit(macvlan_cleanup_module); | |
1776 | ||
1777 | MODULE_LICENSE("GPL"); | |
1778 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1779 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1780 | MODULE_ALIAS_RTNL_LINK("macvlan"); |