9988d4abb372b16a4c70995a047a87548aead7e4
[linux-2.6.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 #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         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  */
97 static 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
140 static 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_set_dev(skb, 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
181 static 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
194 void 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
207 int 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. */
245 int 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
265 void 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
270 static 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 (compare_ether_addr(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
306 clear_allmulti:
307         if (dev->flags & IFF_ALLMULTI)
308                 dev_set_allmulti(real_dev, -1);
309 del_unicast:
310         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
311                 dev_uc_del(real_dev, dev->dev_addr);
312 out:
313         netif_carrier_off(dev);
314         return err;
315 }
316
317 static 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 (compare_ether_addr(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
336 static 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 (compare_ether_addr(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 (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
355                 dev_uc_del(real_dev, dev->dev_addr);
356
357 out:
358         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
359         return 0;
360 }
361
362 static 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
387 static 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)
400 static 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
413 static 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
425 static 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
436 static 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
447 static 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
458 static 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
472 static 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
484 static 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  */
495 static struct lock_class_key vlan_netdev_xmit_lock_key;
496 static struct lock_class_key vlan_netdev_addr_lock_key;
497
498 static 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
507 static 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
515 static 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
521 static const struct net_device_ops vlan_netdev_ops;
522
523 static 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
581 static 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
597 static 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
613 static 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
621 static 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
629 static 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
667 static void vlan_dev_poll_controller(struct net_device *dev)
668 {
669         return;
670 }
671
672 static 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
695 out:
696         return err;
697 }
698
699 static 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
717 static 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
723 static 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
753 void 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 }