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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 */
48static 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
71static inline u16
72vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
73{
74 struct vlan_priority_tci_mapping *mp;
75
76 mp = vlan_dev_priv(dev)->egress_priority_map[(skb->priority & 0xF)];
77 while (mp) {
78 if (mp->priority == skb->priority) {
79 return mp->vlan_qos; /* This should already be shifted
80 * to mask correctly with the
81 * VLAN's TCI */
82 }
83 mp = mp->next;
84 }
85 return 0;
86}
87
88/*
89 * Create the VLAN header for an arbitrary protocol layer
90 *
91 * saddr=NULL means use device source address
92 * daddr=NULL means leave destination address (eg unresolved arp)
93 *
94 * This is called when the SKB is moving down the stack towards the
95 * physical devices.
96 */
97static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
98 unsigned short type,
99 const void *daddr, const void *saddr,
100 unsigned int len)
101{
102 struct vlan_hdr *vhdr;
103 unsigned int vhdrlen = 0;
104 u16 vlan_tci = 0;
105 int rc;
106
107 if (!(vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
108 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
109
110 vlan_tci = vlan_dev_priv(dev)->vlan_id;
111 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
112 vhdr->h_vlan_TCI = htons(vlan_tci);
113
114 /*
115 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
116 * put the length in here instead.
117 */
118 if (type != ETH_P_802_3 && type != ETH_P_802_2)
119 vhdr->h_vlan_encapsulated_proto = htons(type);
120 else
121 vhdr->h_vlan_encapsulated_proto = htons(len);
122
123 skb->protocol = htons(ETH_P_8021Q);
124 type = ETH_P_8021Q;
125 vhdrlen = VLAN_HLEN;
126 }
127
128 /* Before delegating work to the lower layer, enter our MAC-address */
129 if (saddr == NULL)
130 saddr = dev->dev_addr;
131
132 /* Now make the underlying real hard header */
133 dev = vlan_dev_priv(dev)->real_dev;
134 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
135 if (rc > 0)
136 rc += vhdrlen;
137 return rc;
138}
139
140static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
141 struct net_device *dev)
142{
143 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
144 unsigned int len;
145 int ret;
146
147 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
148 *
149 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
150 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
151 */
152 if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
153 vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR) {
154 u16 vlan_tci;
155 vlan_tci = vlan_dev_priv(dev)->vlan_id;
156 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
157 skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
158 }
159
160 skb->dev = vlan_dev_priv(dev)->real_dev;
161 len = skb->len;
162 if (netpoll_tx_running(dev))
163 return skb->dev->netdev_ops->ndo_start_xmit(skb, skb->dev);
164 ret = dev_queue_xmit(skb);
165
166 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
167 struct vlan_pcpu_stats *stats;
168
169 stats = this_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats);
170 u64_stats_update_begin(&stats->syncp);
171 stats->tx_packets++;
172 stats->tx_bytes += len;
173 u64_stats_update_end(&stats->syncp);
174 } else {
175 this_cpu_inc(vlan_dev_priv(dev)->vlan_pcpu_stats->tx_dropped);
176 }
177
178 return ret;
179}
180
181static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
182{
183 /* TODO: gotta make sure the underlying layer can handle it,
184 * maybe an IFF_VLAN_CAPABLE flag for devices?
185 */
186 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu)
187 return -ERANGE;
188
189 dev->mtu = new_mtu;
190
191 return 0;
192}
193
194void vlan_dev_set_ingress_priority(const struct net_device *dev,
195 u32 skb_prio, u16 vlan_prio)
196{
197 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
198
199 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
200 vlan->nr_ingress_mappings--;
201 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
202 vlan->nr_ingress_mappings++;
203
204 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
205}
206
207int vlan_dev_set_egress_priority(const struct net_device *dev,
208 u32 skb_prio, u16 vlan_prio)
209{
210 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
211 struct vlan_priority_tci_mapping *mp = NULL;
212 struct vlan_priority_tci_mapping *np;
213 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
214
215 /* See if a priority mapping exists.. */
216 mp = vlan->egress_priority_map[skb_prio & 0xF];
217 while (mp) {
218 if (mp->priority == skb_prio) {
219 if (mp->vlan_qos && !vlan_qos)
220 vlan->nr_egress_mappings--;
221 else if (!mp->vlan_qos && vlan_qos)
222 vlan->nr_egress_mappings++;
223 mp->vlan_qos = vlan_qos;
224 return 0;
225 }
226 mp = mp->next;
227 }
228
229 /* Create a new mapping then. */
230 mp = vlan->egress_priority_map[skb_prio & 0xF];
231 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
232 if (!np)
233 return -ENOBUFS;
234
235 np->next = mp;
236 np->priority = skb_prio;
237 np->vlan_qos = vlan_qos;
238 vlan->egress_priority_map[skb_prio & 0xF] = np;
239 if (vlan_qos)
240 vlan->nr_egress_mappings++;
241 return 0;
242}
243
244/* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
245int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
246{
247 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
248 u32 old_flags = vlan->flags;
249
250 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
251 VLAN_FLAG_LOOSE_BINDING))
252 return -EINVAL;
253
254 vlan->flags = (old_flags & ~mask) | (flags & mask);
255
256 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
257 if (vlan->flags & VLAN_FLAG_GVRP)
258 vlan_gvrp_request_join(dev);
259 else
260 vlan_gvrp_request_leave(dev);
261 }
262 return 0;
263}
264
265void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
266{
267 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
268}
269
270static int vlan_dev_open(struct net_device *dev)
271{
272 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
273 struct net_device *real_dev = vlan->real_dev;
274 int err;
275
276 if (!(real_dev->flags & IFF_UP) &&
277 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
278 return -ENETDOWN;
279
280 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) {
281 err = dev_uc_add(real_dev, dev->dev_addr);
282 if (err < 0)
283 goto out;
284 }
285
286 if (dev->flags & IFF_ALLMULTI) {
287 err = dev_set_allmulti(real_dev, 1);
288 if (err < 0)
289 goto del_unicast;
290 }
291 if (dev->flags & IFF_PROMISC) {
292 err = dev_set_promiscuity(real_dev, 1);
293 if (err < 0)
294 goto clear_allmulti;
295 }
296
297 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
298
299 if (vlan->flags & VLAN_FLAG_GVRP)
300 vlan_gvrp_request_join(dev);
301
302 if (netif_carrier_ok(real_dev))
303 netif_carrier_on(dev);
304 return 0;
305
306clear_allmulti:
307 if (dev->flags & IFF_ALLMULTI)
308 dev_set_allmulti(real_dev, -1);
309del_unicast:
310 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
311 dev_uc_del(real_dev, dev->dev_addr);
312out:
313 netif_carrier_off(dev);
314 return err;
315}
316
317static int vlan_dev_stop(struct net_device *dev)
318{
319 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
320 struct net_device *real_dev = vlan->real_dev;
321
322 dev_mc_unsync(real_dev, dev);
323 dev_uc_unsync(real_dev, dev);
324 if (dev->flags & IFF_ALLMULTI)
325 dev_set_allmulti(real_dev, -1);
326 if (dev->flags & IFF_PROMISC)
327 dev_set_promiscuity(real_dev, -1);
328
329 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
330 dev_uc_del(real_dev, dev->dev_addr);
331
332 netif_carrier_off(dev);
333 return 0;
334}
335
336static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
337{
338 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
339 struct sockaddr *addr = p;
340 int err;
341
342 if (!is_valid_ether_addr(addr->sa_data))
343 return -EADDRNOTAVAIL;
344
345 if (!(dev->flags & IFF_UP))
346 goto out;
347
348 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
349 err = dev_uc_add(real_dev, addr->sa_data);
350 if (err < 0)
351 return err;
352 }
353
354 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
355 dev_uc_del(real_dev, dev->dev_addr);
356
357out:
358 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
359 return 0;
360}
361
362static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
363{
364 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
365 const struct net_device_ops *ops = real_dev->netdev_ops;
366 struct ifreq ifrr;
367 int err = -EOPNOTSUPP;
368
369 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
370 ifrr.ifr_ifru = ifr->ifr_ifru;
371
372 switch (cmd) {
373 case SIOCGMIIPHY:
374 case SIOCGMIIREG:
375 case SIOCSMIIREG:
376 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
377 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
378 break;
379 }
380
381 if (!err)
382 ifr->ifr_ifru = ifrr.ifr_ifru;
383
384 return err;
385}
386
387static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
388{
389 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
390 const struct net_device_ops *ops = real_dev->netdev_ops;
391 int err = 0;
392
393 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
394 err = ops->ndo_neigh_setup(real_dev, pa);
395
396 return err;
397}
398
399#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
400static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
401 struct scatterlist *sgl, unsigned int sgc)
402{
403 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
404 const struct net_device_ops *ops = real_dev->netdev_ops;
405 int rc = 0;
406
407 if (ops->ndo_fcoe_ddp_setup)
408 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
409
410 return rc;
411}
412
413static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
414{
415 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
416 const struct net_device_ops *ops = real_dev->netdev_ops;
417 int len = 0;
418
419 if (ops->ndo_fcoe_ddp_done)
420 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
421
422 return len;
423}
424
425static int vlan_dev_fcoe_enable(struct net_device *dev)
426{
427 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
428 const struct net_device_ops *ops = real_dev->netdev_ops;
429 int rc = -EINVAL;
430
431 if (ops->ndo_fcoe_enable)
432 rc = ops->ndo_fcoe_enable(real_dev);
433 return rc;
434}
435
436static int vlan_dev_fcoe_disable(struct net_device *dev)
437{
438 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
439 const struct net_device_ops *ops = real_dev->netdev_ops;
440 int rc = -EINVAL;
441
442 if (ops->ndo_fcoe_disable)
443 rc = ops->ndo_fcoe_disable(real_dev);
444 return rc;
445}
446
447static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
448{
449 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
450 const struct net_device_ops *ops = real_dev->netdev_ops;
451 int rc = -EINVAL;
452
453 if (ops->ndo_fcoe_get_wwn)
454 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
455 return rc;
456}
457
458static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
459 struct scatterlist *sgl, unsigned int sgc)
460{
461 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
462 const struct net_device_ops *ops = real_dev->netdev_ops;
463 int rc = 0;
464
465 if (ops->ndo_fcoe_ddp_target)
466 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
467
468 return rc;
469}
470#endif
471
472static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
473{
474 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
475
476 if (dev->flags & IFF_UP) {
477 if (change & IFF_ALLMULTI)
478 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
479 if (change & IFF_PROMISC)
480 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
481 }
482}
483
484static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
485{
486 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
487 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
488}
489
490/*
491 * vlan network devices have devices nesting below it, and are a special
492 * "super class" of normal network devices; split their locks off into a
493 * separate class since they always nest.
494 */
495static struct lock_class_key vlan_netdev_xmit_lock_key;
496static struct lock_class_key vlan_netdev_addr_lock_key;
497
498static void vlan_dev_set_lockdep_one(struct net_device *dev,
499 struct netdev_queue *txq,
500 void *_subclass)
501{
502 lockdep_set_class_and_subclass(&txq->_xmit_lock,
503 &vlan_netdev_xmit_lock_key,
504 *(int *)_subclass);
505}
506
507static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
508{
509 lockdep_set_class_and_subclass(&dev->addr_list_lock,
510 &vlan_netdev_addr_lock_key,
511 subclass);
512 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
513}
514
515static const struct header_ops vlan_header_ops = {
516 .create = vlan_dev_hard_header,
517 .rebuild = vlan_dev_rebuild_header,
518 .parse = eth_header_parse,
519};
520
521static const struct net_device_ops vlan_netdev_ops;
522
523static int vlan_dev_init(struct net_device *dev)
524{
525 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
526 int subclass = 0;
527
528 netif_carrier_off(dev);
529
530 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
531 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
532 IFF_MASTER | IFF_SLAVE);
533 dev->iflink = real_dev->ifindex;
534 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
535 (1<<__LINK_STATE_DORMANT))) |
536 (1<<__LINK_STATE_PRESENT);
537
538 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG |
539 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO |
540 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM |
541 NETIF_F_ALL_FCOE;
542
543 dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
544 dev->gso_max_size = real_dev->gso_max_size;
545
546 /* ipv6 shared card related stuff */
547 dev->dev_id = real_dev->dev_id;
548
549 if (is_zero_ether_addr(dev->dev_addr))
550 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
551 if (is_zero_ether_addr(dev->broadcast))
552 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
553
554#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
555 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
556#endif
557
558 dev->needed_headroom = real_dev->needed_headroom;
559 if (real_dev->features & NETIF_F_HW_VLAN_TX) {
560 dev->header_ops = real_dev->header_ops;
561 dev->hard_header_len = real_dev->hard_header_len;
562 } else {
563 dev->header_ops = &vlan_header_ops;
564 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
565 }
566
567 dev->netdev_ops = &vlan_netdev_ops;
568
569 if (is_vlan_dev(real_dev))
570 subclass = 1;
571
572 vlan_dev_set_lockdep_class(dev, subclass);
573
574 vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
575 if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
576 return -ENOMEM;
577
578 return 0;
579}
580
581static void vlan_dev_uninit(struct net_device *dev)
582{
583 struct vlan_priority_tci_mapping *pm;
584 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
585 int i;
586
587 free_percpu(vlan->vlan_pcpu_stats);
588 vlan->vlan_pcpu_stats = NULL;
589 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
590 while ((pm = vlan->egress_priority_map[i]) != NULL) {
591 vlan->egress_priority_map[i] = pm->next;
592 kfree(pm);
593 }
594 }
595}
596
597static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
598 netdev_features_t features)
599{
600 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
601 u32 old_features = features;
602
603 features &= real_dev->vlan_features;
604 features |= NETIF_F_RXCSUM;
605 features &= real_dev->features;
606
607 features |= old_features & NETIF_F_SOFT_FEATURES;
608 features |= NETIF_F_LLTX;
609
610 return features;
611}
612
613static int vlan_ethtool_get_settings(struct net_device *dev,
614 struct ethtool_cmd *cmd)
615{
616 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
617
618 return __ethtool_get_settings(vlan->real_dev, cmd);
619}
620
621static void vlan_ethtool_get_drvinfo(struct net_device *dev,
622 struct ethtool_drvinfo *info)
623{
624 strcpy(info->driver, vlan_fullname);
625 strcpy(info->version, vlan_version);
626 strcpy(info->fw_version, "N/A");
627}
628
629static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
630{
631
632 if (vlan_dev_priv(dev)->vlan_pcpu_stats) {
633 struct vlan_pcpu_stats *p;
634 u32 rx_errors = 0, tx_dropped = 0;
635 int i;
636
637 for_each_possible_cpu(i) {
638 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
639 unsigned int start;
640
641 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
642 do {
643 start = u64_stats_fetch_begin_bh(&p->syncp);
644 rxpackets = p->rx_packets;
645 rxbytes = p->rx_bytes;
646 rxmulticast = p->rx_multicast;
647 txpackets = p->tx_packets;
648 txbytes = p->tx_bytes;
649 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
650
651 stats->rx_packets += rxpackets;
652 stats->rx_bytes += rxbytes;
653 stats->multicast += rxmulticast;
654 stats->tx_packets += txpackets;
655 stats->tx_bytes += txbytes;
656 /* rx_errors & tx_dropped are u32 */
657 rx_errors += p->rx_errors;
658 tx_dropped += p->tx_dropped;
659 }
660 stats->rx_errors = rx_errors;
661 stats->tx_dropped = tx_dropped;
662 }
663 return stats;
664}
665
666#ifdef CONFIG_NET_POLL_CONTROLLER
667static void vlan_dev_poll_controller(struct net_device *dev)
668{
669 return;
670}
671
672static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
673{
674 struct vlan_dev_priv *info = vlan_dev_priv(dev);
675 struct net_device *real_dev = info->real_dev;
676 struct netpoll *netpoll;
677 int err = 0;
678
679 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
680 err = -ENOMEM;
681 if (!netpoll)
682 goto out;
683
684 netpoll->dev = real_dev;
685 strlcpy(netpoll->dev_name, real_dev->name, IFNAMSIZ);
686
687 err = __netpoll_setup(netpoll);
688 if (err) {
689 kfree(netpoll);
690 goto out;
691 }
692
693 info->netpoll = netpoll;
694
695out:
696 return err;
697}
698
699static void vlan_dev_netpoll_cleanup(struct net_device *dev)
700{
701 struct vlan_dev_priv *info = vlan_dev_priv(dev);
702 struct netpoll *netpoll = info->netpoll;
703
704 if (!netpoll)
705 return;
706
707 info->netpoll = NULL;
708
709 /* Wait for transmitting packets to finish before freeing. */
710 synchronize_rcu_bh();
711
712 __netpoll_cleanup(netpoll);
713 kfree(netpoll);
714}
715#endif /* CONFIG_NET_POLL_CONTROLLER */
716
717static const struct ethtool_ops vlan_ethtool_ops = {
718 .get_settings = vlan_ethtool_get_settings,
719 .get_drvinfo = vlan_ethtool_get_drvinfo,
720 .get_link = ethtool_op_get_link,
721};
722
723static const struct net_device_ops vlan_netdev_ops = {
724 .ndo_change_mtu = vlan_dev_change_mtu,
725 .ndo_init = vlan_dev_init,
726 .ndo_uninit = vlan_dev_uninit,
727 .ndo_open = vlan_dev_open,
728 .ndo_stop = vlan_dev_stop,
729 .ndo_start_xmit = vlan_dev_hard_start_xmit,
730 .ndo_validate_addr = eth_validate_addr,
731 .ndo_set_mac_address = vlan_dev_set_mac_address,
732 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
733 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
734 .ndo_do_ioctl = vlan_dev_ioctl,
735 .ndo_neigh_setup = vlan_dev_neigh_setup,
736 .ndo_get_stats64 = vlan_dev_get_stats64,
737#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
738 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
739 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
740 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
741 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
742 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
743 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
744#endif
745#ifdef CONFIG_NET_POLL_CONTROLLER
746 .ndo_poll_controller = vlan_dev_poll_controller,
747 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
748 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
749#endif
750 .ndo_fix_features = vlan_dev_fix_features,
751};
752
753void vlan_setup(struct net_device *dev)
754{
755 ether_setup(dev);
756
757 dev->priv_flags |= IFF_802_1Q_VLAN;
758 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
759 dev->tx_queue_len = 0;
760
761 dev->netdev_ops = &vlan_netdev_ops;
762 dev->destructor = free_netdev;
763 dev->ethtool_ops = &vlan_ethtool_ops;
764
765 memset(dev->broadcast, 0, ETH_ALEN);
766}