Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-3.6
[linux-3.10.git] / net / 8021q / vlan_dev.c
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 #include <linux/module.h>
24 #include <linux/slab.h>
25 #include <linux/skbuff.h>
26 #include <linux/netdevice.h>
27 #include <linux/etherdevice.h>
28 #include <linux/ethtool.h>
29 #include <net/arp.h>
30
31 #include "vlan.h"
32 #include "vlanproc.h"
33 #include <linux/if_vlan.h>
34
35 /*
36  *      Rebuild the Ethernet MAC header. This is called after an ARP
37  *      (or in future other address resolution) has completed on this
38  *      sk_buff. We now let ARP fill in the other fields.
39  *
40  *      This routine CANNOT use cached dst->neigh!
41  *      Really, it is used only when dst->neigh is wrong.
42  *
43  * TODO:  This needs a checkup, I'm ignorant here. --BLG
44  */
45 static int vlan_dev_rebuild_header(struct sk_buff *skb)
46 {
47         struct net_device *dev = skb->dev;
48         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
49
50         switch (veth->h_vlan_encapsulated_proto) {
51 #ifdef CONFIG_INET
52         case htons(ETH_P_IP):
53
54                 /* TODO:  Confirm this will work with VLAN headers... */
55                 return arp_find(veth->h_dest, skb);
56 #endif
57         default:
58                 pr_debug("%s: unable to resolve type %X addresses.\n",
59                          dev->name, ntohs(veth->h_vlan_encapsulated_proto));
60
61                 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
62                 break;
63         }
64
65         return 0;
66 }
67
68 static inline u16
69 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
70 {
71         struct vlan_priority_tci_mapping *mp;
72
73         mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)];
74         while (mp) {
75                 if (mp->priority == skb->priority) {
76                         return mp->vlan_qos; /* This should already be shifted
77                                               * to mask correctly with the
78                                               * VLAN's TCI */
79                 }
80                 mp = mp->next;
81         }
82         return 0;
83 }
84
85 /*
86  *      Create the VLAN header for an arbitrary protocol layer
87  *
88  *      saddr=NULL      means use device source address
89  *      daddr=NULL      means leave destination address (eg unresolved arp)
90  *
91  *  This is called when the SKB is moving down the stack towards the
92  *  physical devices.
93  */
94 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
95                                 unsigned short type,
96                                 const void *daddr, const void *saddr,
97                                 unsigned int len)
98 {
99         struct vlan_hdr *vhdr;
100         unsigned int vhdrlen = 0;
101         u16 vlan_tci = 0;
102         int rc;
103
104         if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
105                 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
106
107                 vlan_tci = vlan_dev_info(dev)->vlan_id;
108                 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
109                 vhdr->h_vlan_TCI = htons(vlan_tci);
110
111                 /*
112                  *  Set the protocol type. For a packet of type ETH_P_802_3/2 we
113                  *  put the length in here instead.
114                  */
115                 if (type != ETH_P_802_3 && type != ETH_P_802_2)
116                         vhdr->h_vlan_encapsulated_proto = htons(type);
117                 else
118                         vhdr->h_vlan_encapsulated_proto = htons(len);
119
120                 skb->protocol = htons(ETH_P_8021Q);
121                 type = ETH_P_8021Q;
122                 vhdrlen = VLAN_HLEN;
123         }
124
125         /* Before delegating work to the lower layer, enter our MAC-address */
126         if (saddr == NULL)
127                 saddr = dev->dev_addr;
128
129         /* Now make the underlying real hard header */
130         dev = vlan_dev_info(dev)->real_dev;
131         rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
132         if (rc > 0)
133                 rc += vhdrlen;
134         return rc;
135 }
136
137 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
138                                             struct net_device *dev)
139 {
140         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
141         unsigned int len;
142         int ret;
143
144         /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
145          *
146          * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
147          * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
148          */
149         if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
150             vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {
151                 u16 vlan_tci;
152                 vlan_tci = vlan_dev_info(dev)->vlan_id;
153                 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
154                 skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
155         }
156
157         skb_set_dev(skb, vlan_dev_info(dev)->real_dev);
158         len = skb->len;
159         ret = dev_queue_xmit(skb);
160
161         if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
162                 struct vlan_pcpu_stats *stats;
163
164                 stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats);
165                 u64_stats_update_begin(&stats->syncp);
166                 stats->tx_packets++;
167                 stats->tx_bytes += len;
168                 u64_stats_update_begin(&stats->syncp);
169         } else {
170                 this_cpu_inc(vlan_dev_info(dev)->vlan_pcpu_stats->tx_dropped);
171         }
172
173         return ret;
174 }
175
176 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
177 {
178         /* TODO: gotta make sure the underlying layer can handle it,
179          * maybe an IFF_VLAN_CAPABLE flag for devices?
180          */
181         if (vlan_dev_info(dev)->real_dev->mtu < new_mtu)
182                 return -ERANGE;
183
184         dev->mtu = new_mtu;
185
186         return 0;
187 }
188
189 void vlan_dev_set_ingress_priority(const struct net_device *dev,
190                                    u32 skb_prio, u16 vlan_prio)
191 {
192         struct vlan_dev_info *vlan = vlan_dev_info(dev);
193
194         if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
195                 vlan->nr_ingress_mappings--;
196         else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
197                 vlan->nr_ingress_mappings++;
198
199         vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
200 }
201
202 int vlan_dev_set_egress_priority(const struct net_device *dev,
203                                  u32 skb_prio, u16 vlan_prio)
204 {
205         struct vlan_dev_info *vlan = vlan_dev_info(dev);
206         struct vlan_priority_tci_mapping *mp = NULL;
207         struct vlan_priority_tci_mapping *np;
208         u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
209
210         /* See if a priority mapping exists.. */
211         mp = vlan->egress_priority_map[skb_prio & 0xF];
212         while (mp) {
213                 if (mp->priority == skb_prio) {
214                         if (mp->vlan_qos && !vlan_qos)
215                                 vlan->nr_egress_mappings--;
216                         else if (!mp->vlan_qos && vlan_qos)
217                                 vlan->nr_egress_mappings++;
218                         mp->vlan_qos = vlan_qos;
219                         return 0;
220                 }
221                 mp = mp->next;
222         }
223
224         /* Create a new mapping then. */
225         mp = vlan->egress_priority_map[skb_prio & 0xF];
226         np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
227         if (!np)
228                 return -ENOBUFS;
229
230         np->next = mp;
231         np->priority = skb_prio;
232         np->vlan_qos = vlan_qos;
233         vlan->egress_priority_map[skb_prio & 0xF] = np;
234         if (vlan_qos)
235                 vlan->nr_egress_mappings++;
236         return 0;
237 }
238
239 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
240 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
241 {
242         struct vlan_dev_info *vlan = vlan_dev_info(dev);
243         u32 old_flags = vlan->flags;
244
245         if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
246                      VLAN_FLAG_LOOSE_BINDING))
247                 return -EINVAL;
248
249         vlan->flags = (old_flags & ~mask) | (flags & mask);
250
251         if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
252                 if (vlan->flags & VLAN_FLAG_GVRP)
253                         vlan_gvrp_request_join(dev);
254                 else
255                         vlan_gvrp_request_leave(dev);
256         }
257         return 0;
258 }
259
260 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
261 {
262         strncpy(result, vlan_dev_info(dev)->real_dev->name, 23);
263 }
264
265 static int vlan_dev_open(struct net_device *dev)
266 {
267         struct vlan_dev_info *vlan = vlan_dev_info(dev);
268         struct net_device *real_dev = vlan->real_dev;
269         int err;
270
271         if (!(real_dev->flags & IFF_UP) &&
272             !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
273                 return -ENETDOWN;
274
275         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {
276                 err = dev_uc_add(real_dev, dev->dev_addr);
277                 if (err < 0)
278                         goto out;
279         }
280
281         if (dev->flags & IFF_ALLMULTI) {
282                 err = dev_set_allmulti(real_dev, 1);
283                 if (err < 0)
284                         goto del_unicast;
285         }
286         if (dev->flags & IFF_PROMISC) {
287                 err = dev_set_promiscuity(real_dev, 1);
288                 if (err < 0)
289                         goto clear_allmulti;
290         }
291
292         memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
293
294         if (vlan->flags & VLAN_FLAG_GVRP)
295                 vlan_gvrp_request_join(dev);
296
297         if (netif_carrier_ok(real_dev))
298                 netif_carrier_on(dev);
299         return 0;
300
301 clear_allmulti:
302         if (dev->flags & IFF_ALLMULTI)
303                 dev_set_allmulti(real_dev, -1);
304 del_unicast:
305         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
306                 dev_uc_del(real_dev, dev->dev_addr);
307 out:
308         netif_carrier_off(dev);
309         return err;
310 }
311
312 static int vlan_dev_stop(struct net_device *dev)
313 {
314         struct vlan_dev_info *vlan = vlan_dev_info(dev);
315         struct net_device *real_dev = vlan->real_dev;
316
317         dev_mc_unsync(real_dev, dev);
318         dev_uc_unsync(real_dev, dev);
319         if (dev->flags & IFF_ALLMULTI)
320                 dev_set_allmulti(real_dev, -1);
321         if (dev->flags & IFF_PROMISC)
322                 dev_set_promiscuity(real_dev, -1);
323
324         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
325                 dev_uc_del(real_dev, dev->dev_addr);
326
327         netif_carrier_off(dev);
328         return 0;
329 }
330
331 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
332 {
333         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
334         struct sockaddr *addr = p;
335         int err;
336
337         if (!is_valid_ether_addr(addr->sa_data))
338                 return -EADDRNOTAVAIL;
339
340         if (!(dev->flags & IFF_UP))
341                 goto out;
342
343         if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) {
344                 err = dev_uc_add(real_dev, addr->sa_data);
345                 if (err < 0)
346                         return err;
347         }
348
349         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
350                 dev_uc_del(real_dev, dev->dev_addr);
351
352 out:
353         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
354         return 0;
355 }
356
357 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
358 {
359         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
360         const struct net_device_ops *ops = real_dev->netdev_ops;
361         struct ifreq ifrr;
362         int err = -EOPNOTSUPP;
363
364         strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
365         ifrr.ifr_ifru = ifr->ifr_ifru;
366
367         switch (cmd) {
368         case SIOCGMIIPHY:
369         case SIOCGMIIREG:
370         case SIOCSMIIREG:
371                 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
372                         err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
373                 break;
374         }
375
376         if (!err)
377                 ifr->ifr_ifru = ifrr.ifr_ifru;
378
379         return err;
380 }
381
382 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
383 {
384         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
385         const struct net_device_ops *ops = real_dev->netdev_ops;
386         int err = 0;
387
388         if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
389                 err = ops->ndo_neigh_setup(real_dev, pa);
390
391         return err;
392 }
393
394 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
395 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
396                                    struct scatterlist *sgl, unsigned int sgc)
397 {
398         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
399         const struct net_device_ops *ops = real_dev->netdev_ops;
400         int rc = 0;
401
402         if (ops->ndo_fcoe_ddp_setup)
403                 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
404
405         return rc;
406 }
407
408 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
409 {
410         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
411         const struct net_device_ops *ops = real_dev->netdev_ops;
412         int len = 0;
413
414         if (ops->ndo_fcoe_ddp_done)
415                 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
416
417         return len;
418 }
419
420 static int vlan_dev_fcoe_enable(struct net_device *dev)
421 {
422         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
423         const struct net_device_ops *ops = real_dev->netdev_ops;
424         int rc = -EINVAL;
425
426         if (ops->ndo_fcoe_enable)
427                 rc = ops->ndo_fcoe_enable(real_dev);
428         return rc;
429 }
430
431 static int vlan_dev_fcoe_disable(struct net_device *dev)
432 {
433         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
434         const struct net_device_ops *ops = real_dev->netdev_ops;
435         int rc = -EINVAL;
436
437         if (ops->ndo_fcoe_disable)
438                 rc = ops->ndo_fcoe_disable(real_dev);
439         return rc;
440 }
441
442 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
443 {
444         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
445         const struct net_device_ops *ops = real_dev->netdev_ops;
446         int rc = -EINVAL;
447
448         if (ops->ndo_fcoe_get_wwn)
449                 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
450         return rc;
451 }
452
453 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
454                                     struct scatterlist *sgl, unsigned int sgc)
455 {
456         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
457         const struct net_device_ops *ops = real_dev->netdev_ops;
458         int rc = 0;
459
460         if (ops->ndo_fcoe_ddp_target)
461                 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
462
463         return rc;
464 }
465 #endif
466
467 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
468 {
469         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
470
471         if (change & IFF_ALLMULTI)
472                 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
473         if (change & IFF_PROMISC)
474                 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
475 }
476
477 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
478 {
479         dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
480         dev_uc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
481 }
482
483 /*
484  * vlan network devices have devices nesting below it, and are a special
485  * "super class" of normal network devices; split their locks off into a
486  * separate class since they always nest.
487  */
488 static struct lock_class_key vlan_netdev_xmit_lock_key;
489 static struct lock_class_key vlan_netdev_addr_lock_key;
490
491 static void vlan_dev_set_lockdep_one(struct net_device *dev,
492                                      struct netdev_queue *txq,
493                                      void *_subclass)
494 {
495         lockdep_set_class_and_subclass(&txq->_xmit_lock,
496                                        &vlan_netdev_xmit_lock_key,
497                                        *(int *)_subclass);
498 }
499
500 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
501 {
502         lockdep_set_class_and_subclass(&dev->addr_list_lock,
503                                        &vlan_netdev_addr_lock_key,
504                                        subclass);
505         netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
506 }
507
508 static const struct header_ops vlan_header_ops = {
509         .create  = vlan_dev_hard_header,
510         .rebuild = vlan_dev_rebuild_header,
511         .parse   = eth_header_parse,
512 };
513
514 static const struct net_device_ops vlan_netdev_ops;
515
516 static int vlan_dev_init(struct net_device *dev)
517 {
518         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
519         int subclass = 0;
520
521         netif_carrier_off(dev);
522
523         /* IFF_BROADCAST|IFF_MULTICAST; ??? */
524         dev->flags  = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
525                                           IFF_MASTER | IFF_SLAVE);
526         dev->iflink = real_dev->ifindex;
527         dev->state  = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
528                                           (1<<__LINK_STATE_DORMANT))) |
529                       (1<<__LINK_STATE_PRESENT);
530
531         dev->hw_features = real_dev->vlan_features & NETIF_F_ALL_TX_OFFLOADS;
532         dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
533         dev->gso_max_size = real_dev->gso_max_size;
534
535         /* ipv6 shared card related stuff */
536         dev->dev_id = real_dev->dev_id;
537
538         if (is_zero_ether_addr(dev->dev_addr))
539                 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
540         if (is_zero_ether_addr(dev->broadcast))
541                 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
542
543 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
544         dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
545 #endif
546
547         dev->needed_headroom = real_dev->needed_headroom;
548         if (real_dev->features & NETIF_F_HW_VLAN_TX) {
549                 dev->header_ops      = real_dev->header_ops;
550                 dev->hard_header_len = real_dev->hard_header_len;
551         } else {
552                 dev->header_ops      = &vlan_header_ops;
553                 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
554         }
555
556         dev->netdev_ops = &vlan_netdev_ops;
557
558         if (is_vlan_dev(real_dev))
559                 subclass = 1;
560
561         vlan_dev_set_lockdep_class(dev, subclass);
562
563         vlan_dev_info(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
564         if (!vlan_dev_info(dev)->vlan_pcpu_stats)
565                 return -ENOMEM;
566
567         return 0;
568 }
569
570 static void vlan_dev_uninit(struct net_device *dev)
571 {
572         struct vlan_priority_tci_mapping *pm;
573         struct vlan_dev_info *vlan = vlan_dev_info(dev);
574         int i;
575
576         free_percpu(vlan->vlan_pcpu_stats);
577         vlan->vlan_pcpu_stats = NULL;
578         for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
579                 while ((pm = vlan->egress_priority_map[i]) != NULL) {
580                         vlan->egress_priority_map[i] = pm->next;
581                         kfree(pm);
582                 }
583         }
584 }
585
586 static u32 vlan_dev_fix_features(struct net_device *dev, u32 features)
587 {
588         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
589
590         features &= (real_dev->features | NETIF_F_LLTX);
591         if (dev_ethtool_get_rx_csum(real_dev))
592                 features |= NETIF_F_RXCSUM;
593
594         return features;
595 }
596
597 static int vlan_ethtool_get_settings(struct net_device *dev,
598                                      struct ethtool_cmd *cmd)
599 {
600         const struct vlan_dev_info *vlan = vlan_dev_info(dev);
601         return dev_ethtool_get_settings(vlan->real_dev, cmd);
602 }
603
604 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
605                                      struct ethtool_drvinfo *info)
606 {
607         strcpy(info->driver, vlan_fullname);
608         strcpy(info->version, vlan_version);
609         strcpy(info->fw_version, "N/A");
610 }
611
612 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
613 {
614
615         if (vlan_dev_info(dev)->vlan_pcpu_stats) {
616                 struct vlan_pcpu_stats *p;
617                 u32 rx_errors = 0, tx_dropped = 0;
618                 int i;
619
620                 for_each_possible_cpu(i) {
621                         u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
622                         unsigned int start;
623
624                         p = per_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats, i);
625                         do {
626                                 start = u64_stats_fetch_begin_bh(&p->syncp);
627                                 rxpackets       = p->rx_packets;
628                                 rxbytes         = p->rx_bytes;
629                                 rxmulticast     = p->rx_multicast;
630                                 txpackets       = p->tx_packets;
631                                 txbytes         = p->tx_bytes;
632                         } while (u64_stats_fetch_retry_bh(&p->syncp, start));
633
634                         stats->rx_packets       += rxpackets;
635                         stats->rx_bytes         += rxbytes;
636                         stats->multicast        += rxmulticast;
637                         stats->tx_packets       += txpackets;
638                         stats->tx_bytes         += txbytes;
639                         /* rx_errors & tx_dropped are u32 */
640                         rx_errors       += p->rx_errors;
641                         tx_dropped      += p->tx_dropped;
642                 }
643                 stats->rx_errors  = rx_errors;
644                 stats->tx_dropped = tx_dropped;
645         }
646         return stats;
647 }
648
649 static const struct ethtool_ops vlan_ethtool_ops = {
650         .get_settings           = vlan_ethtool_get_settings,
651         .get_drvinfo            = vlan_ethtool_get_drvinfo,
652         .get_link               = ethtool_op_get_link,
653 };
654
655 static const struct net_device_ops vlan_netdev_ops = {
656         .ndo_change_mtu         = vlan_dev_change_mtu,
657         .ndo_init               = vlan_dev_init,
658         .ndo_uninit             = vlan_dev_uninit,
659         .ndo_open               = vlan_dev_open,
660         .ndo_stop               = vlan_dev_stop,
661         .ndo_start_xmit =  vlan_dev_hard_start_xmit,
662         .ndo_validate_addr      = eth_validate_addr,
663         .ndo_set_mac_address    = vlan_dev_set_mac_address,
664         .ndo_set_rx_mode        = vlan_dev_set_rx_mode,
665         .ndo_set_multicast_list = vlan_dev_set_rx_mode,
666         .ndo_change_rx_flags    = vlan_dev_change_rx_flags,
667         .ndo_do_ioctl           = vlan_dev_ioctl,
668         .ndo_neigh_setup        = vlan_dev_neigh_setup,
669         .ndo_get_stats64        = vlan_dev_get_stats64,
670 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
671         .ndo_fcoe_ddp_setup     = vlan_dev_fcoe_ddp_setup,
672         .ndo_fcoe_ddp_done      = vlan_dev_fcoe_ddp_done,
673         .ndo_fcoe_enable        = vlan_dev_fcoe_enable,
674         .ndo_fcoe_disable       = vlan_dev_fcoe_disable,
675         .ndo_fcoe_get_wwn       = vlan_dev_fcoe_get_wwn,
676         .ndo_fcoe_ddp_target    = vlan_dev_fcoe_ddp_target,
677 #endif
678         .ndo_fix_features       = vlan_dev_fix_features,
679 };
680
681 void vlan_setup(struct net_device *dev)
682 {
683         ether_setup(dev);
684
685         dev->priv_flags         |= IFF_802_1Q_VLAN;
686         dev->priv_flags         &= ~IFF_XMIT_DST_RELEASE;
687         dev->tx_queue_len       = 0;
688
689         dev->netdev_ops         = &vlan_netdev_ops;
690         dev->destructor         = free_netdev;
691         dev->ethtool_ops        = &vlan_ethtool_ops;
692
693         memset(dev->broadcast, 0, ETH_ALEN);
694 }