vlan: propogate ethtool speed values
[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 #include <linux/module.h>
24 #include <linux/skbuff.h>
25 #include <linux/netdevice.h>
26 #include <linux/etherdevice.h>
27 #include <linux/ethtool.h>
28 #include <net/arp.h>
29
30 #include "vlan.h"
31 #include "vlanproc.h"
32 #include <linux/if_vlan.h>
33
34 /*
35  *      Rebuild the Ethernet MAC header. This is called after an ARP
36  *      (or in future other address resolution) has completed on this
37  *      sk_buff. We now let ARP fill in the other fields.
38  *
39  *      This routine CANNOT use cached dst->neigh!
40  *      Really, it is used only when dst->neigh is wrong.
41  *
42  * TODO:  This needs a checkup, I'm ignorant here. --BLG
43  */
44 static int vlan_dev_rebuild_header(struct sk_buff *skb)
45 {
46         struct net_device *dev = skb->dev;
47         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
48
49         switch (veth->h_vlan_encapsulated_proto) {
50 #ifdef CONFIG_INET
51         case htons(ETH_P_IP):
52
53                 /* TODO:  Confirm this will work with VLAN headers... */
54                 return arp_find(veth->h_dest, skb);
55 #endif
56         default:
57                 pr_debug("%s: unable to resolve type %X addresses.\n",
58                          dev->name, ntohs(veth->h_vlan_encapsulated_proto));
59
60                 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
61                 break;
62         }
63
64         return 0;
65 }
66
67 static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb)
68 {
69         if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) {
70                 if (skb_cow(skb, skb_headroom(skb)) < 0)
71                         skb = NULL;
72                 if (skb) {
73                         /* Lifted from Gleb's VLAN code... */
74                         memmove(skb->data - ETH_HLEN,
75                                 skb->data - VLAN_ETH_HLEN, 12);
76                         skb->mac_header += VLAN_HLEN;
77                 }
78         }
79
80         return skb;
81 }
82
83 static inline void vlan_set_encap_proto(struct sk_buff *skb,
84                 struct vlan_hdr *vhdr)
85 {
86         __be16 proto;
87         unsigned char *rawp;
88
89         /*
90          * Was a VLAN packet, grab the encapsulated protocol, which the layer
91          * three protocols care about.
92          */
93
94         proto = vhdr->h_vlan_encapsulated_proto;
95         if (ntohs(proto) >= 1536) {
96                 skb->protocol = proto;
97                 return;
98         }
99
100         rawp = skb->data;
101         if (*(unsigned short *)rawp == 0xFFFF)
102                 /*
103                  * This is a magic hack to spot IPX packets. Older Novell
104                  * breaks the protocol design and runs IPX over 802.3 without
105                  * an 802.2 LLC layer. We look for FFFF which isn't a used
106                  * 802.2 SSAP/DSAP. This won't work for fault tolerant netware
107                  * but does for the rest.
108                  */
109                 skb->protocol = htons(ETH_P_802_3);
110         else
111                 /*
112                  * Real 802.2 LLC
113                  */
114                 skb->protocol = htons(ETH_P_802_2);
115 }
116
117 /*
118  *      Determine the packet's protocol ID. The rule here is that we
119  *      assume 802.3 if the type field is short enough to be a length.
120  *      This is normal practice and works for any 'now in use' protocol.
121  *
122  *  Also, at this point we assume that we ARE dealing exclusively with
123  *  VLAN packets, or packets that should be made into VLAN packets based
124  *  on a default VLAN ID.
125  *
126  *  NOTE:  Should be similar to ethernet/eth.c.
127  *
128  *  SANITY NOTE:  This method is called when a packet is moving up the stack
129  *                towards userland.  To get here, it would have already passed
130  *                through the ethernet/eth.c eth_type_trans() method.
131  *  SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be
132  *                 stored UNALIGNED in the memory.  RISC systems don't like
133  *                 such cases very much...
134  *  SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be
135  *                  aligned, so there doesn't need to be any of the unaligned
136  *                  stuff.  It has been commented out now...  --Ben
137  *
138  */
139 int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
140                   struct packet_type *ptype, struct net_device *orig_dev)
141 {
142         struct vlan_hdr *vhdr;
143         struct net_device_stats *stats;
144         u16 vlan_id;
145         u16 vlan_tci;
146
147         skb = skb_share_check(skb, GFP_ATOMIC);
148         if (skb == NULL)
149                 goto err_free;
150
151         if (unlikely(!pskb_may_pull(skb, VLAN_HLEN)))
152                 goto err_free;
153
154         vhdr = (struct vlan_hdr *)skb->data;
155         vlan_tci = ntohs(vhdr->h_vlan_TCI);
156         vlan_id = vlan_tci & VLAN_VID_MASK;
157
158         rcu_read_lock();
159         skb->dev = __find_vlan_dev(dev, vlan_id);
160         if (!skb->dev) {
161                 pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n",
162                          __func__, vlan_id, dev->name);
163                 goto err_unlock;
164         }
165
166         skb->dev->last_rx = jiffies;
167
168         stats = &skb->dev->stats;
169         stats->rx_packets++;
170         stats->rx_bytes += skb->len;
171
172         skb_pull_rcsum(skb, VLAN_HLEN);
173
174         skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci);
175
176         pr_debug("%s: priority: %u for TCI: %hu\n",
177                  __func__, skb->priority, vlan_tci);
178
179         switch (skb->pkt_type) {
180         case PACKET_BROADCAST: /* Yeah, stats collect these together.. */
181                 /* stats->broadcast ++; // no such counter :-( */
182                 break;
183
184         case PACKET_MULTICAST:
185                 stats->multicast++;
186                 break;
187
188         case PACKET_OTHERHOST:
189                 /* Our lower layer thinks this is not local, let's make sure.
190                  * This allows the VLAN to have a different MAC than the
191                  * underlying device, and still route correctly.
192                  */
193                 if (!compare_ether_addr(eth_hdr(skb)->h_dest,
194                                         skb->dev->dev_addr))
195                         skb->pkt_type = PACKET_HOST;
196                 break;
197         default:
198                 break;
199         }
200
201         vlan_set_encap_proto(skb, vhdr);
202
203         skb = vlan_check_reorder_header(skb);
204         if (!skb) {
205                 stats->rx_errors++;
206                 goto err_unlock;
207         }
208
209         netif_rx(skb);
210         rcu_read_unlock();
211         return NET_RX_SUCCESS;
212
213 err_unlock:
214         rcu_read_unlock();
215 err_free:
216         kfree_skb(skb);
217         return NET_RX_DROP;
218 }
219
220 static inline u16
221 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
222 {
223         struct vlan_priority_tci_mapping *mp;
224
225         mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)];
226         while (mp) {
227                 if (mp->priority == skb->priority) {
228                         return mp->vlan_qos; /* This should already be shifted
229                                               * to mask correctly with the
230                                               * VLAN's TCI */
231                 }
232                 mp = mp->next;
233         }
234         return 0;
235 }
236
237 /*
238  *      Create the VLAN header for an arbitrary protocol layer
239  *
240  *      saddr=NULL      means use device source address
241  *      daddr=NULL      means leave destination address (eg unresolved arp)
242  *
243  *  This is called when the SKB is moving down the stack towards the
244  *  physical devices.
245  */
246 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
247                                 unsigned short type,
248                                 const void *daddr, const void *saddr,
249                                 unsigned int len)
250 {
251         struct vlan_hdr *vhdr;
252         unsigned int vhdrlen = 0;
253         u16 vlan_tci = 0;
254         int rc;
255
256         if (WARN_ON(skb_headroom(skb) < dev->hard_header_len))
257                 return -ENOSPC;
258
259         if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
260                 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
261
262                 vlan_tci = vlan_dev_info(dev)->vlan_id;
263                 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
264                 vhdr->h_vlan_TCI = htons(vlan_tci);
265
266                 /*
267                  *  Set the protocol type. For a packet of type ETH_P_802_3 we
268                  *  put the length in here instead. It is up to the 802.2
269                  *  layer to carry protocol information.
270                  */
271                 if (type != ETH_P_802_3)
272                         vhdr->h_vlan_encapsulated_proto = htons(type);
273                 else
274                         vhdr->h_vlan_encapsulated_proto = htons(len);
275
276                 skb->protocol = htons(ETH_P_8021Q);
277                 type = ETH_P_8021Q;
278                 vhdrlen = VLAN_HLEN;
279         }
280
281         /* Before delegating work to the lower layer, enter our MAC-address */
282         if (saddr == NULL)
283                 saddr = dev->dev_addr;
284
285         /* Now make the underlying real hard header */
286         dev = vlan_dev_info(dev)->real_dev;
287         rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
288         if (rc > 0)
289                 rc += vhdrlen;
290         return rc;
291 }
292
293 static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
294 {
295         struct net_device_stats *stats = &dev->stats;
296         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
297
298         /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
299          *
300          * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
301          * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
302          */
303         if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
304             vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {
305                 unsigned int orig_headroom = skb_headroom(skb);
306                 u16 vlan_tci;
307
308                 vlan_dev_info(dev)->cnt_encap_on_xmit++;
309
310                 vlan_tci = vlan_dev_info(dev)->vlan_id;
311                 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
312                 skb = __vlan_put_tag(skb, vlan_tci);
313                 if (!skb) {
314                         stats->tx_dropped++;
315                         return NETDEV_TX_OK;
316                 }
317
318                 if (orig_headroom < VLAN_HLEN)
319                         vlan_dev_info(dev)->cnt_inc_headroom_on_tx++;
320         }
321
322         stats->tx_packets++;
323         stats->tx_bytes += skb->len;
324
325         skb->dev = vlan_dev_info(dev)->real_dev;
326         dev_queue_xmit(skb);
327         return NETDEV_TX_OK;
328 }
329
330 static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb,
331                                             struct net_device *dev)
332 {
333         struct net_device_stats *stats = &dev->stats;
334         u16 vlan_tci;
335
336         vlan_tci = vlan_dev_info(dev)->vlan_id;
337         vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
338         skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
339
340         stats->tx_packets++;
341         stats->tx_bytes += skb->len;
342
343         skb->dev = vlan_dev_info(dev)->real_dev;
344         dev_queue_xmit(skb);
345         return NETDEV_TX_OK;
346 }
347
348 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
349 {
350         /* TODO: gotta make sure the underlying layer can handle it,
351          * maybe an IFF_VLAN_CAPABLE flag for devices?
352          */
353         if (vlan_dev_info(dev)->real_dev->mtu < new_mtu)
354                 return -ERANGE;
355
356         dev->mtu = new_mtu;
357
358         return 0;
359 }
360
361 void vlan_dev_set_ingress_priority(const struct net_device *dev,
362                                    u32 skb_prio, u16 vlan_prio)
363 {
364         struct vlan_dev_info *vlan = vlan_dev_info(dev);
365
366         if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
367                 vlan->nr_ingress_mappings--;
368         else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
369                 vlan->nr_ingress_mappings++;
370
371         vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
372 }
373
374 int vlan_dev_set_egress_priority(const struct net_device *dev,
375                                  u32 skb_prio, u16 vlan_prio)
376 {
377         struct vlan_dev_info *vlan = vlan_dev_info(dev);
378         struct vlan_priority_tci_mapping *mp = NULL;
379         struct vlan_priority_tci_mapping *np;
380         u32 vlan_qos = (vlan_prio << 13) & 0xE000;
381
382         /* See if a priority mapping exists.. */
383         mp = vlan->egress_priority_map[skb_prio & 0xF];
384         while (mp) {
385                 if (mp->priority == skb_prio) {
386                         if (mp->vlan_qos && !vlan_qos)
387                                 vlan->nr_egress_mappings--;
388                         else if (!mp->vlan_qos && vlan_qos)
389                                 vlan->nr_egress_mappings++;
390                         mp->vlan_qos = vlan_qos;
391                         return 0;
392                 }
393                 mp = mp->next;
394         }
395
396         /* Create a new mapping then. */
397         mp = vlan->egress_priority_map[skb_prio & 0xF];
398         np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
399         if (!np)
400                 return -ENOBUFS;
401
402         np->next = mp;
403         np->priority = skb_prio;
404         np->vlan_qos = vlan_qos;
405         vlan->egress_priority_map[skb_prio & 0xF] = np;
406         if (vlan_qos)
407                 vlan->nr_egress_mappings++;
408         return 0;
409 }
410
411 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
412 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
413 {
414         struct vlan_dev_info *vlan = vlan_dev_info(dev);
415         u32 old_flags = vlan->flags;
416
417         if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP))
418                 return -EINVAL;
419
420         vlan->flags = (old_flags & ~mask) | (flags & mask);
421
422         if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
423                 if (vlan->flags & VLAN_FLAG_GVRP)
424                         vlan_gvrp_request_join(dev);
425                 else
426                         vlan_gvrp_request_leave(dev);
427         }
428         return 0;
429 }
430
431 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
432 {
433         strncpy(result, vlan_dev_info(dev)->real_dev->name, 23);
434 }
435
436 static int vlan_dev_open(struct net_device *dev)
437 {
438         struct vlan_dev_info *vlan = vlan_dev_info(dev);
439         struct net_device *real_dev = vlan->real_dev;
440         int err;
441
442         if (!(real_dev->flags & IFF_UP))
443                 return -ENETDOWN;
444
445         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {
446                 err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN);
447                 if (err < 0)
448                         goto out;
449         }
450
451         if (dev->flags & IFF_ALLMULTI) {
452                 err = dev_set_allmulti(real_dev, 1);
453                 if (err < 0)
454                         goto del_unicast;
455         }
456         if (dev->flags & IFF_PROMISC) {
457                 err = dev_set_promiscuity(real_dev, 1);
458                 if (err < 0)
459                         goto clear_allmulti;
460         }
461
462         memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
463
464         if (vlan->flags & VLAN_FLAG_GVRP)
465                 vlan_gvrp_request_join(dev);
466
467         return 0;
468
469 clear_allmulti:
470         if (dev->flags & IFF_ALLMULTI)
471                 dev_set_allmulti(real_dev, -1);
472 del_unicast:
473         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
474                 dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN);
475 out:
476         return err;
477 }
478
479 static int vlan_dev_stop(struct net_device *dev)
480 {
481         struct vlan_dev_info *vlan = vlan_dev_info(dev);
482         struct net_device *real_dev = vlan->real_dev;
483
484         if (vlan->flags & VLAN_FLAG_GVRP)
485                 vlan_gvrp_request_leave(dev);
486
487         dev_mc_unsync(real_dev, dev);
488         dev_unicast_unsync(real_dev, dev);
489         if (dev->flags & IFF_ALLMULTI)
490                 dev_set_allmulti(real_dev, -1);
491         if (dev->flags & IFF_PROMISC)
492                 dev_set_promiscuity(real_dev, -1);
493
494         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
495                 dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len);
496
497         return 0;
498 }
499
500 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
501 {
502         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
503         struct sockaddr *addr = p;
504         int err;
505
506         if (!is_valid_ether_addr(addr->sa_data))
507                 return -EADDRNOTAVAIL;
508
509         if (!(dev->flags & IFF_UP))
510                 goto out;
511
512         if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) {
513                 err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN);
514                 if (err < 0)
515                         return err;
516         }
517
518         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
519                 dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN);
520
521 out:
522         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
523         return 0;
524 }
525
526 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
527 {
528         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
529         struct ifreq ifrr;
530         int err = -EOPNOTSUPP;
531
532         strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
533         ifrr.ifr_ifru = ifr->ifr_ifru;
534
535         switch (cmd) {
536         case SIOCGMIIPHY:
537         case SIOCGMIIREG:
538         case SIOCSMIIREG:
539                 if (real_dev->do_ioctl && netif_device_present(real_dev))
540                         err = real_dev->do_ioctl(real_dev, &ifrr, cmd);
541                 break;
542         }
543
544         if (!err)
545                 ifr->ifr_ifru = ifrr.ifr_ifru;
546
547         return err;
548 }
549
550 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
551 {
552         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
553
554         if (change & IFF_ALLMULTI)
555                 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
556         if (change & IFF_PROMISC)
557                 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
558 }
559
560 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
561 {
562         dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
563         dev_unicast_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
564 }
565
566 /*
567  * vlan network devices have devices nesting below it, and are a special
568  * "super class" of normal network devices; split their locks off into a
569  * separate class since they always nest.
570  */
571 static struct lock_class_key vlan_netdev_xmit_lock_key;
572 static struct lock_class_key vlan_netdev_addr_lock_key;
573
574 static void vlan_dev_set_lockdep_one(struct net_device *dev,
575                                      struct netdev_queue *txq,
576                                      void *_subclass)
577 {
578         lockdep_set_class_and_subclass(&txq->_xmit_lock,
579                                        &vlan_netdev_xmit_lock_key,
580                                        *(int *)_subclass);
581 }
582
583 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
584 {
585         lockdep_set_class_and_subclass(&dev->addr_list_lock,
586                                        &vlan_netdev_addr_lock_key,
587                                        subclass);
588         netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
589 }
590
591 static const struct header_ops vlan_header_ops = {
592         .create  = vlan_dev_hard_header,
593         .rebuild = vlan_dev_rebuild_header,
594         .parse   = eth_header_parse,
595 };
596
597 static int vlan_dev_init(struct net_device *dev)
598 {
599         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
600         int subclass = 0;
601
602         /* IFF_BROADCAST|IFF_MULTICAST; ??? */
603         dev->flags  = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI);
604         dev->iflink = real_dev->ifindex;
605         dev->state  = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
606                                           (1<<__LINK_STATE_DORMANT))) |
607                       (1<<__LINK_STATE_PRESENT);
608
609         dev->features |= real_dev->features & real_dev->vlan_features;
610         dev->gso_max_size = real_dev->gso_max_size;
611
612         /* ipv6 shared card related stuff */
613         dev->dev_id = real_dev->dev_id;
614
615         if (is_zero_ether_addr(dev->dev_addr))
616                 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
617         if (is_zero_ether_addr(dev->broadcast))
618                 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
619
620         if (real_dev->features & NETIF_F_HW_VLAN_TX) {
621                 dev->header_ops      = real_dev->header_ops;
622                 dev->hard_header_len = real_dev->hard_header_len;
623                 dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit;
624         } else {
625                 dev->header_ops      = &vlan_header_ops;
626                 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
627                 dev->hard_start_xmit = vlan_dev_hard_start_xmit;
628         }
629
630         if (is_vlan_dev(real_dev))
631                 subclass = 1;
632
633         vlan_dev_set_lockdep_class(dev, subclass);
634         return 0;
635 }
636
637 static void vlan_dev_uninit(struct net_device *dev)
638 {
639         struct vlan_priority_tci_mapping *pm;
640         struct vlan_dev_info *vlan = vlan_dev_info(dev);
641         int i;
642
643         for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
644                 while ((pm = vlan->egress_priority_map[i]) != NULL) {
645                         vlan->egress_priority_map[i] = pm->next;
646                         kfree(pm);
647                 }
648         }
649 }
650
651 static int vlan_ethtool_get_settings(struct net_device *dev,
652                                      struct ethtool_cmd *cmd)
653 {
654         const struct vlan_dev_info *vlan = vlan_dev_info(dev);
655         struct net_device *real_dev = vlan->real_dev;
656
657         if (!real_dev->ethtool_ops->get_settings)
658                 return -EOPNOTSUPP;
659
660         return real_dev->ethtool_ops->get_settings(real_dev, cmd);
661 }
662
663 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
664                                      struct ethtool_drvinfo *info)
665 {
666         strcpy(info->driver, vlan_fullname);
667         strcpy(info->version, vlan_version);
668         strcpy(info->fw_version, "N/A");
669 }
670
671 static u32 vlan_ethtool_get_rx_csum(struct net_device *dev)
672 {
673         const struct vlan_dev_info *vlan = vlan_dev_info(dev);
674         struct net_device *real_dev = vlan->real_dev;
675
676         if (real_dev->ethtool_ops == NULL ||
677             real_dev->ethtool_ops->get_rx_csum == NULL)
678                 return 0;
679         return real_dev->ethtool_ops->get_rx_csum(real_dev);
680 }
681
682 static u32 vlan_ethtool_get_flags(struct net_device *dev)
683 {
684         const struct vlan_dev_info *vlan = vlan_dev_info(dev);
685         struct net_device *real_dev = vlan->real_dev;
686
687         if (!(real_dev->features & NETIF_F_HW_VLAN_RX) ||
688             real_dev->ethtool_ops == NULL ||
689             real_dev->ethtool_ops->get_flags == NULL)
690                 return 0;
691         return real_dev->ethtool_ops->get_flags(real_dev);
692 }
693
694 static const struct ethtool_ops vlan_ethtool_ops = {
695         .get_settings           = vlan_ethtool_get_settings,
696         .get_drvinfo            = vlan_ethtool_get_drvinfo,
697         .get_link               = ethtool_op_get_link,
698         .get_rx_csum            = vlan_ethtool_get_rx_csum,
699         .get_flags              = vlan_ethtool_get_flags,
700 };
701
702 void vlan_setup(struct net_device *dev)
703 {
704         ether_setup(dev);
705
706         dev->priv_flags         |= IFF_802_1Q_VLAN;
707         dev->tx_queue_len       = 0;
708
709         dev->change_mtu         = vlan_dev_change_mtu;
710         dev->init               = vlan_dev_init;
711         dev->uninit             = vlan_dev_uninit;
712         dev->open               = vlan_dev_open;
713         dev->stop               = vlan_dev_stop;
714         dev->set_mac_address    = vlan_dev_set_mac_address;
715         dev->set_rx_mode        = vlan_dev_set_rx_mode;
716         dev->set_multicast_list = vlan_dev_set_rx_mode;
717         dev->change_rx_flags    = vlan_dev_change_rx_flags;
718         dev->do_ioctl           = vlan_dev_ioctl;
719         dev->destructor         = free_netdev;
720         dev->ethtool_ops        = &vlan_ethtool_ops;
721
722         memset(dev->broadcast, 0, ETH_ALEN);
723 }