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Linux 4.1.16
[linux/fpc-iii.git] / net / 8021q / vlan_dev.c
blob01d7ba840df8dbf48b07e3c8697bb7c11f424a8d
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/net_tstamp.h>
30 #include <linux/etherdevice.h>
31 #include <linux/ethtool.h>
32 #include <net/arp.h>
33
34 #include "vlan.h"
35 #include "vlanproc.h"
36 #include <linux/if_vlan.h>
37 #include <linux/netpoll.h>
38
39 /*
40 * Create the VLAN header for an arbitrary protocol layer
41 *
42 * saddr=NULL means use device source address
43 * daddr=NULL means leave destination address (eg unresolved arp)
44 *
45 * This is called when the SKB is moving down the stack towards the
46 * physical devices.
47 */
48 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
49 unsigned short type,
50 const void *daddr, const void *saddr,
51 unsigned int len)
52 {
53 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
54 struct vlan_hdr *vhdr;
55 unsigned int vhdrlen = 0;
56 u16 vlan_tci = 0;
57 int rc;
58
59 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
60 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
61
62 vlan_tci = vlan->vlan_id;
63 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
64 vhdr->h_vlan_TCI = htons(vlan_tci);
65
66 /*
67 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
68 * put the length in here instead.
69 */
70 if (type != ETH_P_802_3 && type != ETH_P_802_2)
71 vhdr->h_vlan_encapsulated_proto = htons(type);
72 else
73 vhdr->h_vlan_encapsulated_proto = htons(len);
74
75 skb->protocol = vlan->vlan_proto;
76 type = ntohs(vlan->vlan_proto);
77 vhdrlen = VLAN_HLEN;
78 }
79
80 /* Before delegating work to the lower layer, enter our MAC-address */
81 if (saddr == NULL)
82 saddr = dev->dev_addr;
83
84 /* Now make the underlying real hard header */
85 dev = vlan->real_dev;
86 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
87 if (rc > 0)
88 rc += vhdrlen;
89 return rc;
90 }
91
92 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
93 {
94 #ifdef CONFIG_NET_POLL_CONTROLLER
95 if (vlan->netpoll)
96 netpoll_send_skb(vlan->netpoll, skb);
97 #else
98 BUG();
99 #endif
100 return NETDEV_TX_OK;
101 }
102
103 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
104 struct net_device *dev)
105 {
106 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
107 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
108 unsigned int len;
109 int ret;
110
111 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
112 *
113 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
114 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
115 */
116 if (veth->h_vlan_proto != vlan->vlan_proto ||
117 vlan->flags & VLAN_FLAG_REORDER_HDR) {
118 u16 vlan_tci;
119 vlan_tci = vlan->vlan_id;
120 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
121 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
122 }
123
124 skb->dev = vlan->real_dev;
125 len = skb->len;
126 if (unlikely(netpoll_tx_running(dev)))
127 return vlan_netpoll_send_skb(vlan, skb);
128
129 ret = dev_queue_xmit(skb);
130
131 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
132 struct vlan_pcpu_stats *stats;
133
134 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
135 u64_stats_update_begin(&stats->syncp);
136 stats->tx_packets++;
137 stats->tx_bytes += len;
138 u64_stats_update_end(&stats->syncp);
139 } else {
140 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
141 }
142
143 return ret;
144 }
145
146 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
147 {
148 /* TODO: gotta make sure the underlying layer can handle it,
149 * maybe an IFF_VLAN_CAPABLE flag for devices?
150 */
151 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu)
152 return -ERANGE;
153
154 dev->mtu = new_mtu;
155
156 return 0;
157 }
158
159 void vlan_dev_set_ingress_priority(const struct net_device *dev,
160 u32 skb_prio, u16 vlan_prio)
161 {
162 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
163
164 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
165 vlan->nr_ingress_mappings--;
166 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
167 vlan->nr_ingress_mappings++;
168
169 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
170 }
171
172 int vlan_dev_set_egress_priority(const struct net_device *dev,
173 u32 skb_prio, u16 vlan_prio)
174 {
175 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
176 struct vlan_priority_tci_mapping *mp = NULL;
177 struct vlan_priority_tci_mapping *np;
178 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
179
180 /* See if a priority mapping exists.. */
181 mp = vlan->egress_priority_map[skb_prio & 0xF];
182 while (mp) {
183 if (mp->priority == skb_prio) {
184 if (mp->vlan_qos && !vlan_qos)
185 vlan->nr_egress_mappings--;
186 else if (!mp->vlan_qos && vlan_qos)
187 vlan->nr_egress_mappings++;
188 mp->vlan_qos = vlan_qos;
189 return 0;
190 }
191 mp = mp->next;
192 }
193
194 /* Create a new mapping then. */
195 mp = vlan->egress_priority_map[skb_prio & 0xF];
196 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
197 if (!np)
198 return -ENOBUFS;
199
200 np->next = mp;
201 np->priority = skb_prio;
202 np->vlan_qos = vlan_qos;
203 /* Before inserting this element in hash table, make sure all its fields
204 * are committed to memory.
205 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
206 */
207 smp_wmb();
208 vlan->egress_priority_map[skb_prio & 0xF] = np;
209 if (vlan_qos)
210 vlan->nr_egress_mappings++;
211 return 0;
212 }
213
214 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
215 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
216 {
217 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
218 u32 old_flags = vlan->flags;
219
220 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
221 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
222 return -EINVAL;
223
224 vlan->flags = (old_flags & ~mask) | (flags & mask);
225
226 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
227 if (vlan->flags & VLAN_FLAG_GVRP)
228 vlan_gvrp_request_join(dev);
229 else
230 vlan_gvrp_request_leave(dev);
231 }
232
233 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
234 if (vlan->flags & VLAN_FLAG_MVRP)
235 vlan_mvrp_request_join(dev);
236 else
237 vlan_mvrp_request_leave(dev);
238 }
239 return 0;
240 }
241
242 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
243 {
244 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
245 }
246
247 static int vlan_dev_open(struct net_device *dev)
248 {
249 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
250 struct net_device *real_dev = vlan->real_dev;
251 int err;
252
253 if (!(real_dev->flags & IFF_UP) &&
254 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
255 return -ENETDOWN;
256
257 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) {
258 err = dev_uc_add(real_dev, dev->dev_addr);
259 if (err < 0)
260 goto out;
261 }
262
263 if (dev->flags & IFF_ALLMULTI) {
264 err = dev_set_allmulti(real_dev, 1);
265 if (err < 0)
266 goto del_unicast;
267 }
268 if (dev->flags & IFF_PROMISC) {
269 err = dev_set_promiscuity(real_dev, 1);
270 if (err < 0)
271 goto clear_allmulti;
272 }
273
274 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
275
276 if (vlan->flags & VLAN_FLAG_GVRP)
277 vlan_gvrp_request_join(dev);
278
279 if (vlan->flags & VLAN_FLAG_MVRP)
280 vlan_mvrp_request_join(dev);
281
282 if (netif_carrier_ok(real_dev))
283 netif_carrier_on(dev);
284 return 0;
285
286 clear_allmulti:
287 if (dev->flags & IFF_ALLMULTI)
288 dev_set_allmulti(real_dev, -1);
289 del_unicast:
290 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
291 dev_uc_del(real_dev, dev->dev_addr);
292 out:
293 netif_carrier_off(dev);
294 return err;
295 }
296
297 static int vlan_dev_stop(struct net_device *dev)
298 {
299 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
300 struct net_device *real_dev = vlan->real_dev;
301
302 dev_mc_unsync(real_dev, dev);
303 dev_uc_unsync(real_dev, dev);
304 if (dev->flags & IFF_ALLMULTI)
305 dev_set_allmulti(real_dev, -1);
306 if (dev->flags & IFF_PROMISC)
307 dev_set_promiscuity(real_dev, -1);
308
309 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
310 dev_uc_del(real_dev, dev->dev_addr);
311
312 netif_carrier_off(dev);
313 return 0;
314 }
315
316 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
317 {
318 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
319 struct sockaddr *addr = p;
320 int err;
321
322 if (!is_valid_ether_addr(addr->sa_data))
323 return -EADDRNOTAVAIL;
324
325 if (!(dev->flags & IFF_UP))
326 goto out;
327
328 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
329 err = dev_uc_add(real_dev, addr->sa_data);
330 if (err < 0)
331 return err;
332 }
333
334 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
335 dev_uc_del(real_dev, dev->dev_addr);
336
337 out:
338 ether_addr_copy(dev->dev_addr, addr->sa_data);
339 return 0;
340 }
341
342 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
343 {
344 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
345 const struct net_device_ops *ops = real_dev->netdev_ops;
346 struct ifreq ifrr;
347 int err = -EOPNOTSUPP;
348
349 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
350 ifrr.ifr_ifru = ifr->ifr_ifru;
351
352 switch (cmd) {
353 case SIOCGMIIPHY:
354 case SIOCGMIIREG:
355 case SIOCSMIIREG:
356 case SIOCSHWTSTAMP:
357 case SIOCGHWTSTAMP:
358 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
359 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
360 break;
361 }
362
363 if (!err)
364 ifr->ifr_ifru = ifrr.ifr_ifru;
365
366 return err;
367 }
368
369 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
370 {
371 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
372 const struct net_device_ops *ops = real_dev->netdev_ops;
373 int err = 0;
374
375 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
376 err = ops->ndo_neigh_setup(real_dev, pa);
377
378 return err;
379 }
380
381 #if IS_ENABLED(CONFIG_FCOE)
382 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
383 struct scatterlist *sgl, unsigned int sgc)
384 {
385 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
386 const struct net_device_ops *ops = real_dev->netdev_ops;
387 int rc = 0;
388
389 if (ops->ndo_fcoe_ddp_setup)
390 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
391
392 return rc;
393 }
394
395 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
396 {
397 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
398 const struct net_device_ops *ops = real_dev->netdev_ops;
399 int len = 0;
400
401 if (ops->ndo_fcoe_ddp_done)
402 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
403
404 return len;
405 }
406
407 static int vlan_dev_fcoe_enable(struct net_device *dev)
408 {
409 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
410 const struct net_device_ops *ops = real_dev->netdev_ops;
411 int rc = -EINVAL;
412
413 if (ops->ndo_fcoe_enable)
414 rc = ops->ndo_fcoe_enable(real_dev);
415 return rc;
416 }
417
418 static int vlan_dev_fcoe_disable(struct net_device *dev)
419 {
420 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
421 const struct net_device_ops *ops = real_dev->netdev_ops;
422 int rc = -EINVAL;
423
424 if (ops->ndo_fcoe_disable)
425 rc = ops->ndo_fcoe_disable(real_dev);
426 return rc;
427 }
428
429 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
430 {
431 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
432 const struct net_device_ops *ops = real_dev->netdev_ops;
433 int rc = -EINVAL;
434
435 if (ops->ndo_fcoe_get_wwn)
436 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
437 return rc;
438 }
439
440 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
441 struct scatterlist *sgl, unsigned int sgc)
442 {
443 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
444 const struct net_device_ops *ops = real_dev->netdev_ops;
445 int rc = 0;
446
447 if (ops->ndo_fcoe_ddp_target)
448 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
449
450 return rc;
451 }
452 #endif
453
454 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
455 {
456 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
457
458 if (dev->flags & IFF_UP) {
459 if (change & IFF_ALLMULTI)
460 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
461 if (change & IFF_PROMISC)
462 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
463 }
464 }
465
466 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
467 {
468 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
469 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
470 }
471
472 /*
473 * vlan network devices have devices nesting below it, and are a special
474 * "super class" of normal network devices; split their locks off into a
475 * separate class since they always nest.
476 */
477 static struct lock_class_key vlan_netdev_xmit_lock_key;
478 static struct lock_class_key vlan_netdev_addr_lock_key;
479
480 static void vlan_dev_set_lockdep_one(struct net_device *dev,
481 struct netdev_queue *txq,
482 void *_subclass)
483 {
484 lockdep_set_class_and_subclass(&txq->_xmit_lock,
485 &vlan_netdev_xmit_lock_key,
486 *(int *)_subclass);
487 }
488
489 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
490 {
491 lockdep_set_class_and_subclass(&dev->addr_list_lock,
492 &vlan_netdev_addr_lock_key,
493 subclass);
494 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
495 }
496
497 static int vlan_dev_get_lock_subclass(struct net_device *dev)
498 {
499 return vlan_dev_priv(dev)->nest_level;
500 }
501
502 static const struct header_ops vlan_header_ops = {
503 .create = vlan_dev_hard_header,
504 .parse = eth_header_parse,
505 };
506
507 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
508 unsigned short type,
509 const void *daddr, const void *saddr,
510 unsigned int len)
511 {
512 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
513 struct net_device *real_dev = vlan->real_dev;
514
515 if (saddr == NULL)
516 saddr = dev->dev_addr;
517
518 return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
519 }
520
521 static const struct header_ops vlan_passthru_header_ops = {
522 .create = vlan_passthru_hard_header,
523 .parse = eth_header_parse,
524 };
525
526 static struct device_type vlan_type = {
527 .name = "vlan",
528 };
529
530 static const struct net_device_ops vlan_netdev_ops;
531
532 static int vlan_dev_init(struct net_device *dev)
533 {
534 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
535
536 netif_carrier_off(dev);
537
538 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
539 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
540 IFF_MASTER | IFF_SLAVE);
541 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
542 (1<<__LINK_STATE_DORMANT))) |
543 (1<<__LINK_STATE_PRESENT);
544
545 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG |
546 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
547 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM |
548 NETIF_F_ALL_FCOE;
549
550 dev->features |= real_dev->vlan_features | NETIF_F_LLTX |
551 NETIF_F_GSO_SOFTWARE;
552 dev->gso_max_size = real_dev->gso_max_size;
553 if (dev->features & NETIF_F_VLAN_FEATURES)
554 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
555
556 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
557
558 /* ipv6 shared card related stuff */
559 dev->dev_id = real_dev->dev_id;
560
561 if (is_zero_ether_addr(dev->dev_addr))
562 eth_hw_addr_inherit(dev, real_dev);
563 if (is_zero_ether_addr(dev->broadcast))
564 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
565
566 #if IS_ENABLED(CONFIG_FCOE)
567 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
568 #endif
569
570 dev->needed_headroom = real_dev->needed_headroom;
571 if (vlan_hw_offload_capable(real_dev->features,
572 vlan_dev_priv(dev)->vlan_proto)) {
573 dev->header_ops = &vlan_passthru_header_ops;
574 dev->hard_header_len = real_dev->hard_header_len;
575 } else {
576 dev->header_ops = &vlan_header_ops;
577 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
578 }
579
580 dev->netdev_ops = &vlan_netdev_ops;
581
582 SET_NETDEV_DEVTYPE(dev, &vlan_type);
583
584 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev));
585
586 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
587 if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
588 return -ENOMEM;
589
590 return 0;
591 }
592
593 static void vlan_dev_uninit(struct net_device *dev)
594 {
595 struct vlan_priority_tci_mapping *pm;
596 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
597 int i;
598
599 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
600 while ((pm = vlan->egress_priority_map[i]) != NULL) {
601 vlan->egress_priority_map[i] = pm->next;
602 kfree(pm);
603 }
604 }
605 }
606
607 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
608 netdev_features_t features)
609 {
610 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
611 netdev_features_t old_features = features;
612
613 features = netdev_intersect_features(features, real_dev->vlan_features);
614 features |= NETIF_F_RXCSUM;
615 features = netdev_intersect_features(features, real_dev->features);
616
617 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
618 features |= NETIF_F_LLTX;
619
620 return features;
621 }
622
623 static int vlan_ethtool_get_settings(struct net_device *dev,
624 struct ethtool_cmd *cmd)
625 {
626 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
627
628 return __ethtool_get_settings(vlan->real_dev, cmd);
629 }
630
631 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
632 struct ethtool_drvinfo *info)
633 {
634 strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
635 strlcpy(info->version, vlan_version, sizeof(info->version));
636 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
637 }
638
639 static int vlan_ethtool_get_ts_info(struct net_device *dev,
640 struct ethtool_ts_info *info)
641 {
642 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
643 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
644
645 if (ops->get_ts_info) {
646 return ops->get_ts_info(vlan->real_dev, info);
647 } else {
648 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
649 SOF_TIMESTAMPING_SOFTWARE;
650 info->phc_index = -1;
651 }
652
653 return 0;
654 }
655
656 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
657 {
658 struct vlan_pcpu_stats *p;
659 u32 rx_errors = 0, tx_dropped = 0;
660 int i;
661
662 for_each_possible_cpu(i) {
663 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
664 unsigned int start;
665
666 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
667 do {
668 start = u64_stats_fetch_begin_irq(&p->syncp);
669 rxpackets = p->rx_packets;
670 rxbytes = p->rx_bytes;
671 rxmulticast = p->rx_multicast;
672 txpackets = p->tx_packets;
673 txbytes = p->tx_bytes;
674 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
675
676 stats->rx_packets += rxpackets;
677 stats->rx_bytes += rxbytes;
678 stats->multicast += rxmulticast;
679 stats->tx_packets += txpackets;
680 stats->tx_bytes += txbytes;
681 /* rx_errors & tx_dropped are u32 */
682 rx_errors += p->rx_errors;
683 tx_dropped += p->tx_dropped;
684 }
685 stats->rx_errors = rx_errors;
686 stats->tx_dropped = tx_dropped;
687
688 return stats;
689 }
690
691 #ifdef CONFIG_NET_POLL_CONTROLLER
692 static void vlan_dev_poll_controller(struct net_device *dev)
693 {
694 return;
695 }
696
697 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
698 {
699 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
700 struct net_device *real_dev = vlan->real_dev;
701 struct netpoll *netpoll;
702 int err = 0;
703
704 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
705 err = -ENOMEM;
706 if (!netpoll)
707 goto out;
708
709 err = __netpoll_setup(netpoll, real_dev);
710 if (err) {
711 kfree(netpoll);
712 goto out;
713 }
714
715 vlan->netpoll = netpoll;
716
717 out:
718 return err;
719 }
720
721 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
722 {
723 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
724 struct netpoll *netpoll = vlan->netpoll;
725
726 if (!netpoll)
727 return;
728
729 vlan->netpoll = NULL;
730
731 __netpoll_free_async(netpoll);
732 }
733 #endif /* CONFIG_NET_POLL_CONTROLLER */
734
735 static int vlan_dev_get_iflink(const struct net_device *dev)
736 {
737 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
738
739 return real_dev->ifindex;
740 }
741
742 static const struct ethtool_ops vlan_ethtool_ops = {
743 .get_settings = vlan_ethtool_get_settings,
744 .get_drvinfo = vlan_ethtool_get_drvinfo,
745 .get_link = ethtool_op_get_link,
746 .get_ts_info = vlan_ethtool_get_ts_info,
747 };
748
749 static const struct net_device_ops vlan_netdev_ops = {
750 .ndo_change_mtu = vlan_dev_change_mtu,
751 .ndo_init = vlan_dev_init,
752 .ndo_uninit = vlan_dev_uninit,
753 .ndo_open = vlan_dev_open,
754 .ndo_stop = vlan_dev_stop,
755 .ndo_start_xmit = vlan_dev_hard_start_xmit,
756 .ndo_validate_addr = eth_validate_addr,
757 .ndo_set_mac_address = vlan_dev_set_mac_address,
758 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
759 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
760 .ndo_do_ioctl = vlan_dev_ioctl,
761 .ndo_neigh_setup = vlan_dev_neigh_setup,
762 .ndo_get_stats64 = vlan_dev_get_stats64,
763 #if IS_ENABLED(CONFIG_FCOE)
764 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
765 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
766 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
767 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
768 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
769 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
770 #endif
771 #ifdef CONFIG_NET_POLL_CONTROLLER
772 .ndo_poll_controller = vlan_dev_poll_controller,
773 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
774 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
775 #endif
776 .ndo_fix_features = vlan_dev_fix_features,
777 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass,
778 .ndo_get_iflink = vlan_dev_get_iflink,
779 };
780
781 static void vlan_dev_free(struct net_device *dev)
782 {
783 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
784
785 free_percpu(vlan->vlan_pcpu_stats);
786 vlan->vlan_pcpu_stats = NULL;
787 free_netdev(dev);
788 }
789
790 void vlan_setup(struct net_device *dev)
791 {
792 ether_setup(dev);
793
794 dev->priv_flags |= IFF_802_1Q_VLAN;
795 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
796 netif_keep_dst(dev);
797 dev->tx_queue_len = 0;
798
799 dev->netdev_ops = &vlan_netdev_ops;
800 dev->destructor = vlan_dev_free;
801 dev->ethtool_ops = &vlan_ethtool_ops;
802
803 eth_zero_addr(dev->broadcast);
804 }
Linux with added FPC-III support