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vlan: set sysfs device_type to 'vlan'
[linux-2.6.git] / net / 8021q / vlan_dev.c
blob4a6d31a082b9e534eadc3fa2873313fa07cc7869
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 inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
141 {
142 #ifdef CONFIG_NET_POLL_CONTROLLER
143 if (vlan->netpoll)
144 netpoll_send_skb(vlan->netpoll, skb);
145 #else
146 BUG();
147 #endif
148 return NETDEV_TX_OK;
149 }
150
151 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
152 struct net_device *dev)
153 {
154 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
155 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
156 unsigned int len;
157 int ret;
158
159 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
160 *
161 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
162 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
163 */
164 if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
165 vlan->flags & VLAN_FLAG_REORDER_HDR) {
166 u16 vlan_tci;
167 vlan_tci = vlan->vlan_id;
168 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
169 skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
170 }
171
172 skb->dev = vlan->real_dev;
173 len = skb->len;
174 if (unlikely(netpoll_tx_running(dev)))
175 return vlan_netpoll_send_skb(vlan, skb);
176
177 ret = dev_queue_xmit(skb);
178
179 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
180 struct vlan_pcpu_stats *stats;
181
182 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
183 u64_stats_update_begin(&stats->syncp);
184 stats->tx_packets++;
185 stats->tx_bytes += len;
186 u64_stats_update_end(&stats->syncp);
187 } else {
188 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
189 }
190
191 return ret;
192 }
193
194 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
195 {
196 /* TODO: gotta make sure the underlying layer can handle it,
197 * maybe an IFF_VLAN_CAPABLE flag for devices?
198 */
199 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu)
200 return -ERANGE;
201
202 dev->mtu = new_mtu;
203
204 return 0;
205 }
206
207 void vlan_dev_set_ingress_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
212 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
213 vlan->nr_ingress_mappings--;
214 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
215 vlan->nr_ingress_mappings++;
216
217 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
218 }
219
220 int vlan_dev_set_egress_priority(const struct net_device *dev,
221 u32 skb_prio, u16 vlan_prio)
222 {
223 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
224 struct vlan_priority_tci_mapping *mp = NULL;
225 struct vlan_priority_tci_mapping *np;
226 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
227
228 /* See if a priority mapping exists.. */
229 mp = vlan->egress_priority_map[skb_prio & 0xF];
230 while (mp) {
231 if (mp->priority == skb_prio) {
232 if (mp->vlan_qos && !vlan_qos)
233 vlan->nr_egress_mappings--;
234 else if (!mp->vlan_qos && vlan_qos)
235 vlan->nr_egress_mappings++;
236 mp->vlan_qos = vlan_qos;
237 return 0;
238 }
239 mp = mp->next;
240 }
241
242 /* Create a new mapping then. */
243 mp = vlan->egress_priority_map[skb_prio & 0xF];
244 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
245 if (!np)
246 return -ENOBUFS;
247
248 np->next = mp;
249 np->priority = skb_prio;
250 np->vlan_qos = vlan_qos;
251 vlan->egress_priority_map[skb_prio & 0xF] = np;
252 if (vlan_qos)
253 vlan->nr_egress_mappings++;
254 return 0;
255 }
256
257 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
258 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
259 {
260 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
261 u32 old_flags = vlan->flags;
262
263 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
264 VLAN_FLAG_LOOSE_BINDING))
265 return -EINVAL;
266
267 vlan->flags = (old_flags & ~mask) | (flags & mask);
268
269 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
270 if (vlan->flags & VLAN_FLAG_GVRP)
271 vlan_gvrp_request_join(dev);
272 else
273 vlan_gvrp_request_leave(dev);
274 }
275 return 0;
276 }
277
278 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
279 {
280 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
281 }
282
283 static int vlan_dev_open(struct net_device *dev)
284 {
285 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
286 struct net_device *real_dev = vlan->real_dev;
287 int err;
288
289 if (!(real_dev->flags & IFF_UP) &&
290 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
291 return -ENETDOWN;
292
293 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) {
294 err = dev_uc_add(real_dev, dev->dev_addr);
295 if (err < 0)
296 goto out;
297 }
298
299 if (dev->flags & IFF_ALLMULTI) {
300 err = dev_set_allmulti(real_dev, 1);
301 if (err < 0)
302 goto del_unicast;
303 }
304 if (dev->flags & IFF_PROMISC) {
305 err = dev_set_promiscuity(real_dev, 1);
306 if (err < 0)
307 goto clear_allmulti;
308 }
309
310 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
311
312 if (vlan->flags & VLAN_FLAG_GVRP)
313 vlan_gvrp_request_join(dev);
314
315 if (netif_carrier_ok(real_dev))
316 netif_carrier_on(dev);
317 return 0;
318
319 clear_allmulti:
320 if (dev->flags & IFF_ALLMULTI)
321 dev_set_allmulti(real_dev, -1);
322 del_unicast:
323 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
324 dev_uc_del(real_dev, dev->dev_addr);
325 out:
326 netif_carrier_off(dev);
327 return err;
328 }
329
330 static int vlan_dev_stop(struct net_device *dev)
331 {
332 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
333 struct net_device *real_dev = vlan->real_dev;
334
335 dev_mc_unsync(real_dev, dev);
336 dev_uc_unsync(real_dev, dev);
337 if (dev->flags & IFF_ALLMULTI)
338 dev_set_allmulti(real_dev, -1);
339 if (dev->flags & IFF_PROMISC)
340 dev_set_promiscuity(real_dev, -1);
341
342 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
343 dev_uc_del(real_dev, dev->dev_addr);
344
345 netif_carrier_off(dev);
346 return 0;
347 }
348
349 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
350 {
351 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
352 struct sockaddr *addr = p;
353 int err;
354
355 if (!is_valid_ether_addr(addr->sa_data))
356 return -EADDRNOTAVAIL;
357
358 if (!(dev->flags & IFF_UP))
359 goto out;
360
361 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
362 err = dev_uc_add(real_dev, addr->sa_data);
363 if (err < 0)
364 return err;
365 }
366
367 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
368 dev_uc_del(real_dev, dev->dev_addr);
369
370 out:
371 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
372 return 0;
373 }
374
375 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
376 {
377 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
378 const struct net_device_ops *ops = real_dev->netdev_ops;
379 struct ifreq ifrr;
380 int err = -EOPNOTSUPP;
381
382 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
383 ifrr.ifr_ifru = ifr->ifr_ifru;
384
385 switch (cmd) {
386 case SIOCGMIIPHY:
387 case SIOCGMIIREG:
388 case SIOCSMIIREG:
389 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
390 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
391 break;
392 }
393
394 if (!err)
395 ifr->ifr_ifru = ifrr.ifr_ifru;
396
397 return err;
398 }
399
400 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
401 {
402 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
403 const struct net_device_ops *ops = real_dev->netdev_ops;
404 int err = 0;
405
406 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
407 err = ops->ndo_neigh_setup(real_dev, pa);
408
409 return err;
410 }
411
412 #if IS_ENABLED(CONFIG_FCOE)
413 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
414 struct scatterlist *sgl, unsigned int sgc)
415 {
416 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
417 const struct net_device_ops *ops = real_dev->netdev_ops;
418 int rc = 0;
419
420 if (ops->ndo_fcoe_ddp_setup)
421 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
422
423 return rc;
424 }
425
426 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
427 {
428 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
429 const struct net_device_ops *ops = real_dev->netdev_ops;
430 int len = 0;
431
432 if (ops->ndo_fcoe_ddp_done)
433 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
434
435 return len;
436 }
437
438 static int vlan_dev_fcoe_enable(struct net_device *dev)
439 {
440 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
441 const struct net_device_ops *ops = real_dev->netdev_ops;
442 int rc = -EINVAL;
443
444 if (ops->ndo_fcoe_enable)
445 rc = ops->ndo_fcoe_enable(real_dev);
446 return rc;
447 }
448
449 static int vlan_dev_fcoe_disable(struct net_device *dev)
450 {
451 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
452 const struct net_device_ops *ops = real_dev->netdev_ops;
453 int rc = -EINVAL;
454
455 if (ops->ndo_fcoe_disable)
456 rc = ops->ndo_fcoe_disable(real_dev);
457 return rc;
458 }
459
460 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
461 {
462 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
463 const struct net_device_ops *ops = real_dev->netdev_ops;
464 int rc = -EINVAL;
465
466 if (ops->ndo_fcoe_get_wwn)
467 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
468 return rc;
469 }
470
471 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
472 struct scatterlist *sgl, unsigned int sgc)
473 {
474 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
475 const struct net_device_ops *ops = real_dev->netdev_ops;
476 int rc = 0;
477
478 if (ops->ndo_fcoe_ddp_target)
479 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
480
481 return rc;
482 }
483 #endif
484
485 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
486 {
487 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
488
489 if (dev->flags & IFF_UP) {
490 if (change & IFF_ALLMULTI)
491 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
492 if (change & IFF_PROMISC)
493 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
494 }
495 }
496
497 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
498 {
499 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
500 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
501 }
502
503 /*
504 * vlan network devices have devices nesting below it, and are a special
505 * "super class" of normal network devices; split their locks off into a
506 * separate class since they always nest.
507 */
508 static struct lock_class_key vlan_netdev_xmit_lock_key;
509 static struct lock_class_key vlan_netdev_addr_lock_key;
510
511 static void vlan_dev_set_lockdep_one(struct net_device *dev,
512 struct netdev_queue *txq,
513 void *_subclass)
514 {
515 lockdep_set_class_and_subclass(&txq->_xmit_lock,
516 &vlan_netdev_xmit_lock_key,
517 *(int *)_subclass);
518 }
519
520 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
521 {
522 lockdep_set_class_and_subclass(&dev->addr_list_lock,
523 &vlan_netdev_addr_lock_key,
524 subclass);
525 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
526 }
527
528 static const struct header_ops vlan_header_ops = {
529 .create = vlan_dev_hard_header,
530 .rebuild = vlan_dev_rebuild_header,
531 .parse = eth_header_parse,
532 };
533
534 static struct device_type vlan_type = {
535 .name = "vlan",
536 };
537
538 static const struct net_device_ops vlan_netdev_ops;
539
540 static int vlan_dev_init(struct net_device *dev)
541 {
542 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
543 int subclass = 0;
544
545 netif_carrier_off(dev);
546
547 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
548 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
549 IFF_MASTER | IFF_SLAVE);
550 dev->iflink = real_dev->ifindex;
551 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
552 (1<<__LINK_STATE_DORMANT))) |
553 (1<<__LINK_STATE_PRESENT);
554
555 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG |
556 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO |
557 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM |
558 NETIF_F_ALL_FCOE;
559
560 dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
561 dev->gso_max_size = real_dev->gso_max_size;
562
563 /* ipv6 shared card related stuff */
564 dev->dev_id = real_dev->dev_id;
565
566 if (is_zero_ether_addr(dev->dev_addr))
567 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
568 if (is_zero_ether_addr(dev->broadcast))
569 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
570
571 #if IS_ENABLED(CONFIG_FCOE)
572 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
573 #endif
574
575 dev->needed_headroom = real_dev->needed_headroom;
576 if (real_dev->features & NETIF_F_HW_VLAN_TX) {
577 dev->header_ops = real_dev->header_ops;
578 dev->hard_header_len = real_dev->hard_header_len;
579 } else {
580 dev->header_ops = &vlan_header_ops;
581 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
582 }
583
584 dev->netdev_ops = &vlan_netdev_ops;
585
586 SET_NETDEV_DEVTYPE(dev, &vlan_type);
587
588 if (is_vlan_dev(real_dev))
589 subclass = 1;
590
591 vlan_dev_set_lockdep_class(dev, subclass);
592
593 vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
594 if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
595 return -ENOMEM;
596
597 return 0;
598 }
599
600 static void vlan_dev_uninit(struct net_device *dev)
601 {
602 struct vlan_priority_tci_mapping *pm;
603 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
604 int i;
605
606 free_percpu(vlan->vlan_pcpu_stats);
607 vlan->vlan_pcpu_stats = NULL;
608 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
609 while ((pm = vlan->egress_priority_map[i]) != NULL) {
610 vlan->egress_priority_map[i] = pm->next;
611 kfree(pm);
612 }
613 }
614 }
615
616 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
617 netdev_features_t features)
618 {
619 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
620 u32 old_features = features;
621
622 features &= real_dev->vlan_features;
623 features |= NETIF_F_RXCSUM;
624 features &= real_dev->features;
625
626 features |= old_features & NETIF_F_SOFT_FEATURES;
627 features |= NETIF_F_LLTX;
628
629 return features;
630 }
631
632 static int vlan_ethtool_get_settings(struct net_device *dev,
633 struct ethtool_cmd *cmd)
634 {
635 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
636
637 return __ethtool_get_settings(vlan->real_dev, cmd);
638 }
639
640 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
641 struct ethtool_drvinfo *info)
642 {
643 strcpy(info->driver, vlan_fullname);
644 strcpy(info->version, vlan_version);
645 strcpy(info->fw_version, "N/A");
646 }
647
648 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
649 {
650
651 if (vlan_dev_priv(dev)->vlan_pcpu_stats) {
652 struct vlan_pcpu_stats *p;
653 u32 rx_errors = 0, tx_dropped = 0;
654 int i;
655
656 for_each_possible_cpu(i) {
657 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
658 unsigned int start;
659
660 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
661 do {
662 start = u64_stats_fetch_begin_bh(&p->syncp);
663 rxpackets = p->rx_packets;
664 rxbytes = p->rx_bytes;
665 rxmulticast = p->rx_multicast;
666 txpackets = p->tx_packets;
667 txbytes = p->tx_bytes;
668 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
669
670 stats->rx_packets += rxpackets;
671 stats->rx_bytes += rxbytes;
672 stats->multicast += rxmulticast;
673 stats->tx_packets += txpackets;
674 stats->tx_bytes += txbytes;
675 /* rx_errors & tx_dropped are u32 */
676 rx_errors += p->rx_errors;
677 tx_dropped += p->tx_dropped;
678 }
679 stats->rx_errors = rx_errors;
680 stats->tx_dropped = tx_dropped;
681 }
682 return stats;
683 }
684
685 #ifdef CONFIG_NET_POLL_CONTROLLER
686 static void vlan_dev_poll_controller(struct net_device *dev)
687 {
688 return;
689 }
690
691 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo,
692 gfp_t gfp)
693 {
694 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
695 struct net_device *real_dev = vlan->real_dev;
696 struct netpoll *netpoll;
697 int err = 0;
698
699 netpoll = kzalloc(sizeof(*netpoll), gfp);
700 err = -ENOMEM;
701 if (!netpoll)
702 goto out;
703
704 err = __netpoll_setup(netpoll, real_dev, gfp);
705 if (err) {
706 kfree(netpoll);
707 goto out;
708 }
709
710 vlan->netpoll = netpoll;
711
712 out:
713 return err;
714 }
715
716 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
717 {
718 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
719 struct netpoll *netpoll = vlan->netpoll;
720
721 if (!netpoll)
722 return;
723
724 vlan->netpoll = NULL;
725
726 __netpoll_free_rcu(netpoll);
727 }
728 #endif /* CONFIG_NET_POLL_CONTROLLER */
729
730 static const struct ethtool_ops vlan_ethtool_ops = {
731 .get_settings = vlan_ethtool_get_settings,
732 .get_drvinfo = vlan_ethtool_get_drvinfo,
733 .get_link = ethtool_op_get_link,
734 };
735
736 static const struct net_device_ops vlan_netdev_ops = {
737 .ndo_change_mtu = vlan_dev_change_mtu,
738 .ndo_init = vlan_dev_init,
739 .ndo_uninit = vlan_dev_uninit,
740 .ndo_open = vlan_dev_open,
741 .ndo_stop = vlan_dev_stop,
742 .ndo_start_xmit = vlan_dev_hard_start_xmit,
743 .ndo_validate_addr = eth_validate_addr,
744 .ndo_set_mac_address = vlan_dev_set_mac_address,
745 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
746 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
747 .ndo_do_ioctl = vlan_dev_ioctl,
748 .ndo_neigh_setup = vlan_dev_neigh_setup,
749 .ndo_get_stats64 = vlan_dev_get_stats64,
750 #if IS_ENABLED(CONFIG_FCOE)
751 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
752 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
753 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
754 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
755 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
756 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
757 #endif
758 #ifdef CONFIG_NET_POLL_CONTROLLER
759 .ndo_poll_controller = vlan_dev_poll_controller,
760 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
761 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
762 #endif
763 .ndo_fix_features = vlan_dev_fix_features,
764 };
765
766 void vlan_setup(struct net_device *dev)
767 {
768 ether_setup(dev);
769
770 dev->priv_flags |= IFF_802_1Q_VLAN;
771 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
772 dev->tx_queue_len = 0;
773
774 dev->netdev_ops = &vlan_netdev_ops;
775 dev->destructor = free_netdev;
776 dev->ethtool_ops = &vlan_ethtool_ops;
777
778 memset(dev->broadcast, 0, ETH_ALEN);
779 }
Linus' kernel tree