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1 | /* -*- linux-c -*- |
2 | * INET 802.1Q VLAN |
3 | * Ethernet-type device handling. |
4 | * |
5 | * Authors: Ben Greear <greearb@candelatech.com> |
6 | * Please send support related email to: netdev@vger.kernel.org |
7 | * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html |
8 | * |
9 | * Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com> |
10 | * - reset skb->pkt_type on incoming packets when MAC was changed |
11 | * - see that changed MAC is saddr for outgoing packets |
12 | * Oct 20, 2001: Ard van Breeman: |
13 | * - Fix MC-list, finally. |
14 | * - Flush MC-list on VLAN destroy. |
15 | * |
16 | * |
17 | * This program is free software; you can redistribute it and/or |
18 | * modify it under the terms of the GNU General Public License |
19 | * as published by the Free Software Foundation; either version |
20 | * 2 of the License, or (at your option) any later version. |
21 | */ |
22 | |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | |
25 | #include <linux/module.h> |
26 | #include <linux/slab.h> |
27 | #include <linux/skbuff.h> |
28 | #include <linux/netdevice.h> |
29 | #include <linux/etherdevice.h> |
30 | #include <linux/ethtool.h> |
31 | #include <net/arp.h> |
32 | |
33 | #include "vlan.h" |
34 | #include "vlanproc.h" |
35 | #include <linux/if_vlan.h> |
36 | #include <linux/netpoll.h> |
37 | |
38 | /* |
39 | * Rebuild the Ethernet MAC header. This is called after an ARP |
40 | * (or in future other address resolution) has completed on this |
41 | * sk_buff. We now let ARP fill in the other fields. |
42 | * |
43 | * This routine CANNOT use cached dst->neigh! |
44 | * Really, it is used only when dst->neigh is wrong. |
45 | * |
46 | * TODO: This needs a checkup, I'm ignorant here. --BLG |
47 | */ |
48 | static int vlan_dev_rebuild_header(struct sk_buff *skb) |
49 | { |
50 | struct net_device *dev = skb->dev; |
51 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
52 | |
53 | switch (veth->h_vlan_encapsulated_proto) { |
54 | #ifdef CONFIG_INET |
55 | case htons(ETH_P_IP): |
56 | |
57 | /* TODO: Confirm this will work with VLAN headers... */ |
58 | return arp_find(veth->h_dest, skb); |
59 | #endif |
60 | default: |
61 | pr_debug("%s: unable to resolve type %X addresses\n", |
62 | dev->name, ntohs(veth->h_vlan_encapsulated_proto)); |
63 | |
64 | memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); |
65 | break; |
66 | } |
67 | |
68 | return 0; |
69 | } |
70 | |
71 | static inline u16 |
72 | vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) |
73 | { |
74 | struct vlan_priority_tci_mapping *mp; |
75 | |
76 | smp_rmb(); /* coupled with smp_wmb() in vlan_dev_set_egress_priority() */ |
77 | |
78 | mp = vlan_dev_priv(dev)->egress_priority_map[(skb->priority & 0xF)]; |
79 | while (mp) { |
80 | if (mp->priority == skb->priority) { |
81 | return mp->vlan_qos; /* This should already be shifted |
82 | * to mask correctly with the |
83 | * VLAN's TCI */ |
84 | } |
85 | mp = mp->next; |
86 | } |
87 | return 0; |
88 | } |
89 | |
90 | /* |
91 | * Create the VLAN header for an arbitrary protocol layer |
92 | * |
93 | * saddr=NULL means use device source address |
94 | * daddr=NULL means leave destination address (eg unresolved arp) |
95 | * |
96 | * This is called when the SKB is moving down the stack towards the |
97 | * physical devices. |
98 | */ |
99 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
100 | unsigned short type, |
101 | const void *daddr, const void *saddr, |
102 | unsigned int len) |
103 | { |
104 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
105 | struct vlan_hdr *vhdr; |
106 | unsigned int vhdrlen = 0; |
107 | u16 vlan_tci = 0; |
108 | int rc; |
109 | |
110 | if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { |
111 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
112 | |
113 | vlan_tci = vlan->vlan_id; |
114 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); |
115 | vhdr->h_vlan_TCI = htons(vlan_tci); |
116 | |
117 | /* |
118 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
119 | * put the length in here instead. |
120 | */ |
121 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
122 | vhdr->h_vlan_encapsulated_proto = htons(type); |
123 | else |
124 | vhdr->h_vlan_encapsulated_proto = htons(len); |
125 | |
126 | skb->protocol = vlan->vlan_proto; |
127 | type = ntohs(vlan->vlan_proto); |
128 | vhdrlen = VLAN_HLEN; |
129 | } |
130 | |
131 | /* Before delegating work to the lower layer, enter our MAC-address */ |
132 | if (saddr == NULL) |
133 | saddr = dev->dev_addr; |
134 | |
135 | /* Now make the underlying real hard header */ |
136 | dev = vlan->real_dev; |
137 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
138 | if (rc > 0) |
139 | rc += vhdrlen; |
140 | return rc; |
141 | } |
142 | |
143 | static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) |
144 | { |
145 | #ifdef CONFIG_NET_POLL_CONTROLLER |
146 | if (vlan->netpoll) |
147 | netpoll_send_skb(vlan->netpoll, skb); |
148 | #else |
149 | BUG(); |
150 | #endif |
151 | return NETDEV_TX_OK; |
152 | } |
153 | |
154 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
155 | struct net_device *dev) |
156 | { |
157 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
158 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
159 | unsigned int len; |
160 | int ret; |
161 | |
162 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
163 | * |
164 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING |
165 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... |
166 | */ |
167 | if (veth->h_vlan_proto != vlan->vlan_proto || |
168 | vlan->flags & VLAN_FLAG_REORDER_HDR) { |
169 | u16 vlan_tci; |
170 | vlan_tci = vlan->vlan_id; |
171 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); |
172 | skb = __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); |
173 | } |
174 | |
175 | skb->dev = vlan->real_dev; |
176 | len = skb->len; |
177 | if (unlikely(netpoll_tx_running(dev))) |
178 | return vlan_netpoll_send_skb(vlan, skb); |
179 | |
180 | ret = dev_queue_xmit(skb); |
181 | |
182 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
183 | struct vlan_pcpu_stats *stats; |
184 | |
185 | stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
186 | u64_stats_update_begin(&stats->syncp); |
187 | stats->tx_packets++; |
188 | stats->tx_bytes += len; |
189 | u64_stats_update_end(&stats->syncp); |
190 | } else { |
191 | this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
192 | } |
193 | |
194 | return ret; |
195 | } |
196 | |
197 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
198 | { |
199 | /* TODO: gotta make sure the underlying layer can handle it, |
200 | * maybe an IFF_VLAN_CAPABLE flag for devices? |
201 | */ |
202 | if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) |
203 | return -ERANGE; |
204 | |
205 | dev->mtu = new_mtu; |
206 | |
207 | return 0; |
208 | } |
209 | |
210 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
211 | u32 skb_prio, u16 vlan_prio) |
212 | { |
213 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
214 | |
215 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) |
216 | vlan->nr_ingress_mappings--; |
217 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) |
218 | vlan->nr_ingress_mappings++; |
219 | |
220 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; |
221 | } |
222 | |
223 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
224 | u32 skb_prio, u16 vlan_prio) |
225 | { |
226 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
227 | struct vlan_priority_tci_mapping *mp = NULL; |
228 | struct vlan_priority_tci_mapping *np; |
229 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
230 | |
231 | /* See if a priority mapping exists.. */ |
232 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
233 | while (mp) { |
234 | if (mp->priority == skb_prio) { |
235 | if (mp->vlan_qos && !vlan_qos) |
236 | vlan->nr_egress_mappings--; |
237 | else if (!mp->vlan_qos && vlan_qos) |
238 | vlan->nr_egress_mappings++; |
239 | mp->vlan_qos = vlan_qos; |
240 | return 0; |
241 | } |
242 | mp = mp->next; |
243 | } |
244 | |
245 | /* Create a new mapping then. */ |
246 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
247 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
248 | if (!np) |
249 | return -ENOBUFS; |
250 | |
251 | np->next = mp; |
252 | np->priority = skb_prio; |
253 | np->vlan_qos = vlan_qos; |
254 | /* Before inserting this element in hash table, make sure all its fields |
255 | * are committed to memory. |
256 | * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() |
257 | */ |
258 | smp_wmb(); |
259 | vlan->egress_priority_map[skb_prio & 0xF] = np; |
260 | if (vlan_qos) |
261 | vlan->nr_egress_mappings++; |
262 | return 0; |
263 | } |
264 | |
265 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
266 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
267 | { |
268 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
269 | u32 old_flags = vlan->flags; |
270 | |
271 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
272 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) |
273 | return -EINVAL; |
274 | |
275 | vlan->flags = (old_flags & ~mask) | (flags & mask); |
276 | |
277 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { |
278 | if (vlan->flags & VLAN_FLAG_GVRP) |
279 | vlan_gvrp_request_join(dev); |
280 | else |
281 | vlan_gvrp_request_leave(dev); |
282 | } |
283 | |
284 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { |
285 | if (vlan->flags & VLAN_FLAG_MVRP) |
286 | vlan_mvrp_request_join(dev); |
287 | else |
288 | vlan_mvrp_request_leave(dev); |
289 | } |
290 | return 0; |
291 | } |
292 | |
293 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
294 | { |
295 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
296 | } |
297 | |
298 | static int vlan_dev_open(struct net_device *dev) |
299 | { |
300 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
301 | struct net_device *real_dev = vlan->real_dev; |
302 | int err; |
303 | |
304 | if (!(real_dev->flags & IFF_UP) && |
305 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
306 | return -ENETDOWN; |
307 | |
308 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { |
309 | err = dev_uc_add(real_dev, dev->dev_addr); |
310 | if (err < 0) |
311 | goto out; |
312 | } |
313 | |
314 | if (dev->flags & IFF_ALLMULTI) { |
315 | err = dev_set_allmulti(real_dev, 1); |
316 | if (err < 0) |
317 | goto del_unicast; |
318 | } |
319 | if (dev->flags & IFF_PROMISC) { |
320 | err = dev_set_promiscuity(real_dev, 1); |
321 | if (err < 0) |
322 | goto clear_allmulti; |
323 | } |
324 | |
325 | memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); |
326 | |
327 | if (vlan->flags & VLAN_FLAG_GVRP) |
328 | vlan_gvrp_request_join(dev); |
329 | |
330 | if (vlan->flags & VLAN_FLAG_MVRP) |
331 | vlan_mvrp_request_join(dev); |
332 | |
333 | if (netif_carrier_ok(real_dev)) |
334 | netif_carrier_on(dev); |
335 | return 0; |
336 | |
337 | clear_allmulti: |
338 | if (dev->flags & IFF_ALLMULTI) |
339 | dev_set_allmulti(real_dev, -1); |
340 | del_unicast: |
341 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
342 | dev_uc_del(real_dev, dev->dev_addr); |
343 | out: |
344 | netif_carrier_off(dev); |
345 | return err; |
346 | } |
347 | |
348 | static int vlan_dev_stop(struct net_device *dev) |
349 | { |
350 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
351 | struct net_device *real_dev = vlan->real_dev; |
352 | |
353 | dev_mc_unsync(real_dev, dev); |
354 | dev_uc_unsync(real_dev, dev); |
355 | if (dev->flags & IFF_ALLMULTI) |
356 | dev_set_allmulti(real_dev, -1); |
357 | if (dev->flags & IFF_PROMISC) |
358 | dev_set_promiscuity(real_dev, -1); |
359 | |
360 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
361 | dev_uc_del(real_dev, dev->dev_addr); |
362 | |
363 | netif_carrier_off(dev); |
364 | return 0; |
365 | } |
366 | |
367 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
368 | { |
369 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
370 | struct sockaddr *addr = p; |
371 | int err; |
372 | |
373 | if (!is_valid_ether_addr(addr->sa_data)) |
374 | return -EADDRNOTAVAIL; |
375 | |
376 | if (!(dev->flags & IFF_UP)) |
377 | goto out; |
378 | |
379 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
380 | err = dev_uc_add(real_dev, addr->sa_data); |
381 | if (err < 0) |
382 | return err; |
383 | } |
384 | |
385 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
386 | dev_uc_del(real_dev, dev->dev_addr); |
387 | |
388 | out: |
389 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
390 | return 0; |
391 | } |
392 | |
393 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
394 | { |
395 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
396 | const struct net_device_ops *ops = real_dev->netdev_ops; |
397 | struct ifreq ifrr; |
398 | int err = -EOPNOTSUPP; |
399 | |
400 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); |
401 | ifrr.ifr_ifru = ifr->ifr_ifru; |
402 | |
403 | switch (cmd) { |
404 | case SIOCGMIIPHY: |
405 | case SIOCGMIIREG: |
406 | case SIOCSMIIREG: |
407 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
408 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); |
409 | break; |
410 | } |
411 | |
412 | if (!err) |
413 | ifr->ifr_ifru = ifrr.ifr_ifru; |
414 | |
415 | return err; |
416 | } |
417 | |
418 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
419 | { |
420 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
421 | const struct net_device_ops *ops = real_dev->netdev_ops; |
422 | int err = 0; |
423 | |
424 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) |
425 | err = ops->ndo_neigh_setup(real_dev, pa); |
426 | |
427 | return err; |
428 | } |
429 | |
430 | #if IS_ENABLED(CONFIG_FCOE) |
431 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
432 | struct scatterlist *sgl, unsigned int sgc) |
433 | { |
434 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
435 | const struct net_device_ops *ops = real_dev->netdev_ops; |
436 | int rc = 0; |
437 | |
438 | if (ops->ndo_fcoe_ddp_setup) |
439 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); |
440 | |
441 | return rc; |
442 | } |
443 | |
444 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) |
445 | { |
446 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
447 | const struct net_device_ops *ops = real_dev->netdev_ops; |
448 | int len = 0; |
449 | |
450 | if (ops->ndo_fcoe_ddp_done) |
451 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); |
452 | |
453 | return len; |
454 | } |
455 | |
456 | static int vlan_dev_fcoe_enable(struct net_device *dev) |
457 | { |
458 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
459 | const struct net_device_ops *ops = real_dev->netdev_ops; |
460 | int rc = -EINVAL; |
461 | |
462 | if (ops->ndo_fcoe_enable) |
463 | rc = ops->ndo_fcoe_enable(real_dev); |
464 | return rc; |
465 | } |
466 | |
467 | static int vlan_dev_fcoe_disable(struct net_device *dev) |
468 | { |
469 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
470 | const struct net_device_ops *ops = real_dev->netdev_ops; |
471 | int rc = -EINVAL; |
472 | |
473 | if (ops->ndo_fcoe_disable) |
474 | rc = ops->ndo_fcoe_disable(real_dev); |
475 | return rc; |
476 | } |
477 | |
478 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) |
479 | { |
480 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
481 | const struct net_device_ops *ops = real_dev->netdev_ops; |
482 | int rc = -EINVAL; |
483 | |
484 | if (ops->ndo_fcoe_get_wwn) |
485 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); |
486 | return rc; |
487 | } |
488 | |
489 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, |
490 | struct scatterlist *sgl, unsigned int sgc) |
491 | { |
492 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
493 | const struct net_device_ops *ops = real_dev->netdev_ops; |
494 | int rc = 0; |
495 | |
496 | if (ops->ndo_fcoe_ddp_target) |
497 | rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); |
498 | |
499 | return rc; |
500 | } |
501 | #endif |
502 | |
503 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
504 | { |
505 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
506 | |
507 | if (dev->flags & IFF_UP) { |
508 | if (change & IFF_ALLMULTI) |
509 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); |
510 | if (change & IFF_PROMISC) |
511 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); |
512 | } |
513 | } |
514 | |
515 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
516 | { |
517 | dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
518 | dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
519 | } |
520 | |
521 | /* |
522 | * vlan network devices have devices nesting below it, and are a special |
523 | * "super class" of normal network devices; split their locks off into a |
524 | * separate class since they always nest. |
525 | */ |
526 | static struct lock_class_key vlan_netdev_xmit_lock_key; |
527 | static struct lock_class_key vlan_netdev_addr_lock_key; |
528 | |
529 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
530 | struct netdev_queue *txq, |
531 | void *_subclass) |
532 | { |
533 | lockdep_set_class_and_subclass(&txq->_xmit_lock, |
534 | &vlan_netdev_xmit_lock_key, |
535 | *(int *)_subclass); |
536 | } |
537 | |
538 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) |
539 | { |
540 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
541 | &vlan_netdev_addr_lock_key, |
542 | subclass); |
543 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
544 | } |
545 | |
546 | static const struct header_ops vlan_header_ops = { |
547 | .create = vlan_dev_hard_header, |
548 | .rebuild = vlan_dev_rebuild_header, |
549 | .parse = eth_header_parse, |
550 | }; |
551 | |
552 | static struct device_type vlan_type = { |
553 | .name = "vlan", |
554 | }; |
555 | |
556 | static const struct net_device_ops vlan_netdev_ops; |
557 | |
558 | static int vlan_dev_init(struct net_device *dev) |
559 | { |
560 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
561 | int subclass = 0; |
562 | |
563 | netif_carrier_off(dev); |
564 | |
565 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
566 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
567 | IFF_MASTER | IFF_SLAVE); |
568 | dev->iflink = real_dev->ifindex; |
569 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | |
570 | (1<<__LINK_STATE_DORMANT))) | |
571 | (1<<__LINK_STATE_PRESENT); |
572 | |
573 | dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | |
574 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | |
575 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | |
576 | NETIF_F_ALL_FCOE; |
577 | |
578 | dev->features |= real_dev->vlan_features | NETIF_F_LLTX; |
579 | dev->gso_max_size = real_dev->gso_max_size; |
580 | |
581 | /* ipv6 shared card related stuff */ |
582 | dev->dev_id = real_dev->dev_id; |
583 | |
584 | if (is_zero_ether_addr(dev->dev_addr)) |
585 | eth_hw_addr_inherit(dev, real_dev); |
586 | if (is_zero_ether_addr(dev->broadcast)) |
587 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); |
588 | |
589 | #if IS_ENABLED(CONFIG_FCOE) |
590 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
591 | #endif |
592 | |
593 | dev->needed_headroom = real_dev->needed_headroom; |
594 | if (real_dev->features & NETIF_F_HW_VLAN_CTAG_TX) { |
595 | dev->header_ops = real_dev->header_ops; |
596 | dev->hard_header_len = real_dev->hard_header_len; |
597 | } else { |
598 | dev->header_ops = &vlan_header_ops; |
599 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; |
600 | } |
601 | |
602 | dev->netdev_ops = &vlan_netdev_ops; |
603 | |
604 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
605 | |
606 | if (is_vlan_dev(real_dev)) |
607 | subclass = 1; |
608 | |
609 | vlan_dev_set_lockdep_class(dev, subclass); |
610 | |
611 | vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats); |
612 | if (!vlan_dev_priv(dev)->vlan_pcpu_stats) |
613 | return -ENOMEM; |
614 | |
615 | return 0; |
616 | } |
617 | |
618 | static void vlan_dev_uninit(struct net_device *dev) |
619 | { |
620 | struct vlan_priority_tci_mapping *pm; |
621 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
622 | int i; |
623 | |
624 | free_percpu(vlan->vlan_pcpu_stats); |
625 | vlan->vlan_pcpu_stats = NULL; |
626 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { |
627 | while ((pm = vlan->egress_priority_map[i]) != NULL) { |
628 | vlan->egress_priority_map[i] = pm->next; |
629 | kfree(pm); |
630 | } |
631 | } |
632 | } |
633 | |
634 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
635 | netdev_features_t features) |
636 | { |
637 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
638 | netdev_features_t old_features = features; |
639 | |
640 | features &= real_dev->vlan_features; |
641 | features |= NETIF_F_RXCSUM; |
642 | features &= real_dev->features; |
643 | |
644 | features |= old_features & NETIF_F_SOFT_FEATURES; |
645 | features |= NETIF_F_LLTX; |
646 | |
647 | return features; |
648 | } |
649 | |
650 | static int vlan_ethtool_get_settings(struct net_device *dev, |
651 | struct ethtool_cmd *cmd) |
652 | { |
653 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
654 | |
655 | return __ethtool_get_settings(vlan->real_dev, cmd); |
656 | } |
657 | |
658 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, |
659 | struct ethtool_drvinfo *info) |
660 | { |
661 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
662 | strlcpy(info->version, vlan_version, sizeof(info->version)); |
663 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
664 | } |
665 | |
666 | static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
667 | { |
668 | |
669 | if (vlan_dev_priv(dev)->vlan_pcpu_stats) { |
670 | struct vlan_pcpu_stats *p; |
671 | u32 rx_errors = 0, tx_dropped = 0; |
672 | int i; |
673 | |
674 | for_each_possible_cpu(i) { |
675 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; |
676 | unsigned int start; |
677 | |
678 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); |
679 | do { |
680 | start = u64_stats_fetch_begin_bh(&p->syncp); |
681 | rxpackets = p->rx_packets; |
682 | rxbytes = p->rx_bytes; |
683 | rxmulticast = p->rx_multicast; |
684 | txpackets = p->tx_packets; |
685 | txbytes = p->tx_bytes; |
686 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
687 | |
688 | stats->rx_packets += rxpackets; |
689 | stats->rx_bytes += rxbytes; |
690 | stats->multicast += rxmulticast; |
691 | stats->tx_packets += txpackets; |
692 | stats->tx_bytes += txbytes; |
693 | /* rx_errors & tx_dropped are u32 */ |
694 | rx_errors += p->rx_errors; |
695 | tx_dropped += p->tx_dropped; |
696 | } |
697 | stats->rx_errors = rx_errors; |
698 | stats->tx_dropped = tx_dropped; |
699 | } |
700 | return stats; |
701 | } |
702 | |
703 | #ifdef CONFIG_NET_POLL_CONTROLLER |
704 | static void vlan_dev_poll_controller(struct net_device *dev) |
705 | { |
706 | return; |
707 | } |
708 | |
709 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo, |
710 | gfp_t gfp) |
711 | { |
712 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
713 | struct net_device *real_dev = vlan->real_dev; |
714 | struct netpoll *netpoll; |
715 | int err = 0; |
716 | |
717 | netpoll = kzalloc(sizeof(*netpoll), gfp); |
718 | err = -ENOMEM; |
719 | if (!netpoll) |
720 | goto out; |
721 | |
722 | err = __netpoll_setup(netpoll, real_dev, gfp); |
723 | if (err) { |
724 | kfree(netpoll); |
725 | goto out; |
726 | } |
727 | |
728 | vlan->netpoll = netpoll; |
729 | |
730 | out: |
731 | return err; |
732 | } |
733 | |
734 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
735 | { |
736 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
737 | struct netpoll *netpoll = vlan->netpoll; |
738 | |
739 | if (!netpoll) |
740 | return; |
741 | |
742 | vlan->netpoll = NULL; |
743 | |
744 | __netpoll_free_async(netpoll); |
745 | } |
746 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
747 | |
748 | static const struct ethtool_ops vlan_ethtool_ops = { |
749 | .get_settings = vlan_ethtool_get_settings, |
750 | .get_drvinfo = vlan_ethtool_get_drvinfo, |
751 | .get_link = ethtool_op_get_link, |
752 | }; |
753 | |
754 | static const struct net_device_ops vlan_netdev_ops = { |
755 | .ndo_change_mtu = vlan_dev_change_mtu, |
756 | .ndo_init = vlan_dev_init, |
757 | .ndo_uninit = vlan_dev_uninit, |
758 | .ndo_open = vlan_dev_open, |
759 | .ndo_stop = vlan_dev_stop, |
760 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
761 | .ndo_validate_addr = eth_validate_addr, |
762 | .ndo_set_mac_address = vlan_dev_set_mac_address, |
763 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, |
764 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
765 | .ndo_do_ioctl = vlan_dev_ioctl, |
766 | .ndo_neigh_setup = vlan_dev_neigh_setup, |
767 | .ndo_get_stats64 = vlan_dev_get_stats64, |
768 | #if IS_ENABLED(CONFIG_FCOE) |
769 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
770 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, |
771 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, |
772 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, |
773 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, |
774 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
775 | #endif |
776 | #ifdef CONFIG_NET_POLL_CONTROLLER |
777 | .ndo_poll_controller = vlan_dev_poll_controller, |
778 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, |
779 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, |
780 | #endif |
781 | .ndo_fix_features = vlan_dev_fix_features, |
782 | }; |
783 | |
784 | void vlan_setup(struct net_device *dev) |
785 | { |
786 | ether_setup(dev); |
787 | |
788 | dev->priv_flags |= IFF_802_1Q_VLAN; |
789 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
790 | dev->tx_queue_len = 0; |
791 | |
792 | dev->netdev_ops = &vlan_netdev_ops; |
793 | dev->destructor = free_netdev; |
794 | dev->ethtool_ops = &vlan_ethtool_ops; |
795 | |
796 | memset(dev->broadcast, 0, ETH_ALEN); |
797 | } |
798 |
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