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[deliverable/linux.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/net_tstamp.h>
30 #include <linux/etherdevice.h>
31 #include <linux/ethtool.h>
32 #include <net/arp.h>
33 #include <net/switchdev.h>
34
35 #include "vlan.h"
36 #include "vlanproc.h"
37 #include <linux/if_vlan.h>
38 #include <linux/netpoll.h>
39
40 /*
41 * Create the VLAN header for an arbitrary protocol layer
42 *
43 * saddr=NULL means use device source address
44 * daddr=NULL means leave destination address (eg unresolved arp)
45 *
46 * This is called when the SKB is moving down the stack towards the
47 * physical devices.
48 */
49 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
50 unsigned short type,
51 const void *daddr, const void *saddr,
52 unsigned int len)
53 {
54 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
55 struct vlan_hdr *vhdr;
56 unsigned int vhdrlen = 0;
57 u16 vlan_tci = 0;
58 int rc;
59
60 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
61 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
62
63 vlan_tci = vlan->vlan_id;
64 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
65 vhdr->h_vlan_TCI = htons(vlan_tci);
66
67 /*
68 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
69 * put the length in here instead.
70 */
71 if (type != ETH_P_802_3 && type != ETH_P_802_2)
72 vhdr->h_vlan_encapsulated_proto = htons(type);
73 else
74 vhdr->h_vlan_encapsulated_proto = htons(len);
75
76 skb->protocol = vlan->vlan_proto;
77 type = ntohs(vlan->vlan_proto);
78 vhdrlen = VLAN_HLEN;
79 }
80
81 /* Before delegating work to the lower layer, enter our MAC-address */
82 if (saddr == NULL)
83 saddr = dev->dev_addr;
84
85 /* Now make the underlying real hard header */
86 dev = vlan->real_dev;
87 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
88 if (rc > 0)
89 rc += vhdrlen;
90 return rc;
91 }
92
93 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
94 {
95 #ifdef CONFIG_NET_POLL_CONTROLLER
96 if (vlan->netpoll)
97 netpoll_send_skb(vlan->netpoll, skb);
98 #else
99 BUG();
100 #endif
101 return NETDEV_TX_OK;
102 }
103
104 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
105 struct net_device *dev)
106 {
107 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
108 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
109 unsigned int len;
110 int ret;
111
112 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
113 *
114 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
115 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
116 */
117 if (veth->h_vlan_proto != vlan->vlan_proto ||
118 vlan->flags & VLAN_FLAG_REORDER_HDR) {
119 u16 vlan_tci;
120 vlan_tci = vlan->vlan_id;
121 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
122 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
123 }
124
125 skb->dev = vlan->real_dev;
126 len = skb->len;
127 if (unlikely(netpoll_tx_running(dev)))
128 return vlan_netpoll_send_skb(vlan, skb);
129
130 ret = dev_queue_xmit(skb);
131
132 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
133 struct vlan_pcpu_stats *stats;
134
135 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
136 u64_stats_update_begin(&stats->syncp);
137 stats->tx_packets++;
138 stats->tx_bytes += len;
139 u64_stats_update_end(&stats->syncp);
140 } else {
141 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
142 }
143
144 return ret;
145 }
146
147 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
148 {
149 /* TODO: gotta make sure the underlying layer can handle it,
150 * maybe an IFF_VLAN_CAPABLE flag for devices?
151 */
152 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu)
153 return -ERANGE;
154
155 dev->mtu = new_mtu;
156
157 return 0;
158 }
159
160 void vlan_dev_set_ingress_priority(const struct net_device *dev,
161 u32 skb_prio, u16 vlan_prio)
162 {
163 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
164
165 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
166 vlan->nr_ingress_mappings--;
167 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
168 vlan->nr_ingress_mappings++;
169
170 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
171 }
172
173 int vlan_dev_set_egress_priority(const struct net_device *dev,
174 u32 skb_prio, u16 vlan_prio)
175 {
176 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
177 struct vlan_priority_tci_mapping *mp = NULL;
178 struct vlan_priority_tci_mapping *np;
179 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
180
181 /* See if a priority mapping exists.. */
182 mp = vlan->egress_priority_map[skb_prio & 0xF];
183 while (mp) {
184 if (mp->priority == skb_prio) {
185 if (mp->vlan_qos && !vlan_qos)
186 vlan->nr_egress_mappings--;
187 else if (!mp->vlan_qos && vlan_qos)
188 vlan->nr_egress_mappings++;
189 mp->vlan_qos = vlan_qos;
190 return 0;
191 }
192 mp = mp->next;
193 }
194
195 /* Create a new mapping then. */
196 mp = vlan->egress_priority_map[skb_prio & 0xF];
197 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
198 if (!np)
199 return -ENOBUFS;
200
201 np->next = mp;
202 np->priority = skb_prio;
203 np->vlan_qos = vlan_qos;
204 /* Before inserting this element in hash table, make sure all its fields
205 * are committed to memory.
206 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
207 */
208 smp_wmb();
209 vlan->egress_priority_map[skb_prio & 0xF] = np;
210 if (vlan_qos)
211 vlan->nr_egress_mappings++;
212 return 0;
213 }
214
215 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
216 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
217 {
218 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
219 u32 old_flags = vlan->flags;
220
221 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
222 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
223 return -EINVAL;
224
225 vlan->flags = (old_flags & ~mask) | (flags & mask);
226
227 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
228 if (vlan->flags & VLAN_FLAG_GVRP)
229 vlan_gvrp_request_join(dev);
230 else
231 vlan_gvrp_request_leave(dev);
232 }
233
234 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
235 if (vlan->flags & VLAN_FLAG_MVRP)
236 vlan_mvrp_request_join(dev);
237 else
238 vlan_mvrp_request_leave(dev);
239 }
240 return 0;
241 }
242
243 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
244 {
245 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
246 }
247
248 static int vlan_dev_open(struct net_device *dev)
249 {
250 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
251 struct net_device *real_dev = vlan->real_dev;
252 int err;
253
254 if (!(real_dev->flags & IFF_UP) &&
255 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
256 return -ENETDOWN;
257
258 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) {
259 err = dev_uc_add(real_dev, dev->dev_addr);
260 if (err < 0)
261 goto out;
262 }
263
264 if (dev->flags & IFF_ALLMULTI) {
265 err = dev_set_allmulti(real_dev, 1);
266 if (err < 0)
267 goto del_unicast;
268 }
269 if (dev->flags & IFF_PROMISC) {
270 err = dev_set_promiscuity(real_dev, 1);
271 if (err < 0)
272 goto clear_allmulti;
273 }
274
275 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
276
277 if (vlan->flags & VLAN_FLAG_GVRP)
278 vlan_gvrp_request_join(dev);
279
280 if (vlan->flags & VLAN_FLAG_MVRP)
281 vlan_mvrp_request_join(dev);
282
283 if (netif_carrier_ok(real_dev))
284 netif_carrier_on(dev);
285 return 0;
286
287 clear_allmulti:
288 if (dev->flags & IFF_ALLMULTI)
289 dev_set_allmulti(real_dev, -1);
290 del_unicast:
291 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
292 dev_uc_del(real_dev, dev->dev_addr);
293 out:
294 netif_carrier_off(dev);
295 return err;
296 }
297
298 static int vlan_dev_stop(struct net_device *dev)
299 {
300 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
301 struct net_device *real_dev = vlan->real_dev;
302
303 dev_mc_unsync(real_dev, dev);
304 dev_uc_unsync(real_dev, dev);
305 if (dev->flags & IFF_ALLMULTI)
306 dev_set_allmulti(real_dev, -1);
307 if (dev->flags & IFF_PROMISC)
308 dev_set_promiscuity(real_dev, -1);
309
310 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
311 dev_uc_del(real_dev, dev->dev_addr);
312
313 netif_carrier_off(dev);
314 return 0;
315 }
316
317 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
318 {
319 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
320 struct sockaddr *addr = p;
321 int err;
322
323 if (!is_valid_ether_addr(addr->sa_data))
324 return -EADDRNOTAVAIL;
325
326 if (!(dev->flags & IFF_UP))
327 goto out;
328
329 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
330 err = dev_uc_add(real_dev, addr->sa_data);
331 if (err < 0)
332 return err;
333 }
334
335 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
336 dev_uc_del(real_dev, dev->dev_addr);
337
338 out:
339 ether_addr_copy(dev->dev_addr, addr->sa_data);
340 return 0;
341 }
342
343 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
344 {
345 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
346 const struct net_device_ops *ops = real_dev->netdev_ops;
347 struct ifreq ifrr;
348 int err = -EOPNOTSUPP;
349
350 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
351 ifrr.ifr_ifru = ifr->ifr_ifru;
352
353 switch (cmd) {
354 case SIOCGMIIPHY:
355 case SIOCGMIIREG:
356 case SIOCSMIIREG:
357 case SIOCSHWTSTAMP:
358 case SIOCGHWTSTAMP:
359 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
360 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
361 break;
362 }
363
364 if (!err)
365 ifr->ifr_ifru = ifrr.ifr_ifru;
366
367 return err;
368 }
369
370 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
371 {
372 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
373 const struct net_device_ops *ops = real_dev->netdev_ops;
374 int err = 0;
375
376 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
377 err = ops->ndo_neigh_setup(real_dev, pa);
378
379 return err;
380 }
381
382 #if IS_ENABLED(CONFIG_FCOE)
383 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
384 struct scatterlist *sgl, unsigned int sgc)
385 {
386 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
387 const struct net_device_ops *ops = real_dev->netdev_ops;
388 int rc = 0;
389
390 if (ops->ndo_fcoe_ddp_setup)
391 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
392
393 return rc;
394 }
395
396 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
397 {
398 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
399 const struct net_device_ops *ops = real_dev->netdev_ops;
400 int len = 0;
401
402 if (ops->ndo_fcoe_ddp_done)
403 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
404
405 return len;
406 }
407
408 static int vlan_dev_fcoe_enable(struct net_device *dev)
409 {
410 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
411 const struct net_device_ops *ops = real_dev->netdev_ops;
412 int rc = -EINVAL;
413
414 if (ops->ndo_fcoe_enable)
415 rc = ops->ndo_fcoe_enable(real_dev);
416 return rc;
417 }
418
419 static int vlan_dev_fcoe_disable(struct net_device *dev)
420 {
421 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
422 const struct net_device_ops *ops = real_dev->netdev_ops;
423 int rc = -EINVAL;
424
425 if (ops->ndo_fcoe_disable)
426 rc = ops->ndo_fcoe_disable(real_dev);
427 return rc;
428 }
429
430 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
431 {
432 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
433 const struct net_device_ops *ops = real_dev->netdev_ops;
434 int rc = -EINVAL;
435
436 if (ops->ndo_fcoe_get_wwn)
437 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
438 return rc;
439 }
440
441 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
442 struct scatterlist *sgl, unsigned int sgc)
443 {
444 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
445 const struct net_device_ops *ops = real_dev->netdev_ops;
446 int rc = 0;
447
448 if (ops->ndo_fcoe_ddp_target)
449 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
450
451 return rc;
452 }
453 #endif
454
455 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
456 {
457 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
458
459 if (dev->flags & IFF_UP) {
460 if (change & IFF_ALLMULTI)
461 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
462 if (change & IFF_PROMISC)
463 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
464 }
465 }
466
467 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
468 {
469 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
470 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
471 }
472
473 /*
474 * vlan network devices have devices nesting below it, and are a special
475 * "super class" of normal network devices; split their locks off into a
476 * separate class since they always nest.
477 */
478 static struct lock_class_key vlan_netdev_xmit_lock_key;
479 static struct lock_class_key vlan_netdev_addr_lock_key;
480
481 static void vlan_dev_set_lockdep_one(struct net_device *dev,
482 struct netdev_queue *txq,
483 void *_subclass)
484 {
485 lockdep_set_class_and_subclass(&txq->_xmit_lock,
486 &vlan_netdev_xmit_lock_key,
487 *(int *)_subclass);
488 }
489
490 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
491 {
492 lockdep_set_class_and_subclass(&dev->addr_list_lock,
493 &vlan_netdev_addr_lock_key,
494 subclass);
495 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
496 }
497
498 static int vlan_dev_get_lock_subclass(struct net_device *dev)
499 {
500 return vlan_dev_priv(dev)->nest_level;
501 }
502
503 static const struct header_ops vlan_header_ops = {
504 .create = vlan_dev_hard_header,
505 .parse = eth_header_parse,
506 };
507
508 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
509 unsigned short type,
510 const void *daddr, const void *saddr,
511 unsigned int len)
512 {
513 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
514 struct net_device *real_dev = vlan->real_dev;
515
516 if (saddr == NULL)
517 saddr = dev->dev_addr;
518
519 return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
520 }
521
522 static const struct header_ops vlan_passthru_header_ops = {
523 .create = vlan_passthru_hard_header,
524 .parse = eth_header_parse,
525 };
526
527 static struct device_type vlan_type = {
528 .name = "vlan",
529 };
530
531 static const struct net_device_ops vlan_netdev_ops;
532
533 static int vlan_dev_init(struct net_device *dev)
534 {
535 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
536
537 netif_carrier_off(dev);
538
539 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
540 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
541 IFF_MASTER | IFF_SLAVE);
542 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
543 (1<<__LINK_STATE_DORMANT))) |
544 (1<<__LINK_STATE_PRESENT);
545
546 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
547 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
548 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
549 NETIF_F_ALL_FCOE;
550
551 dev->features |= real_dev->vlan_features | NETIF_F_LLTX |
552 NETIF_F_GSO_SOFTWARE;
553 dev->gso_max_size = real_dev->gso_max_size;
554 dev->gso_max_segs = real_dev->gso_max_segs;
555 if (dev->features & NETIF_F_VLAN_FEATURES)
556 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
557
558 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
559
560 /* ipv6 shared card related stuff */
561 dev->dev_id = real_dev->dev_id;
562
563 if (is_zero_ether_addr(dev->dev_addr))
564 eth_hw_addr_inherit(dev, real_dev);
565 if (is_zero_ether_addr(dev->broadcast))
566 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
567
568 #if IS_ENABLED(CONFIG_FCOE)
569 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
570 #endif
571
572 dev->needed_headroom = real_dev->needed_headroom;
573 if (vlan_hw_offload_capable(real_dev->features,
574 vlan_dev_priv(dev)->vlan_proto)) {
575 dev->header_ops = &vlan_passthru_header_ops;
576 dev->hard_header_len = real_dev->hard_header_len;
577 } else {
578 dev->header_ops = &vlan_header_ops;
579 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
580 }
581
582 dev->netdev_ops = &vlan_netdev_ops;
583
584 SET_NETDEV_DEVTYPE(dev, &vlan_type);
585
586 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev));
587
588 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
589 if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
590 return -ENOMEM;
591
592 return 0;
593 }
594
595 static void vlan_dev_uninit(struct net_device *dev)
596 {
597 struct vlan_priority_tci_mapping *pm;
598 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
599 int i;
600
601 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
602 while ((pm = vlan->egress_priority_map[i]) != NULL) {
603 vlan->egress_priority_map[i] = pm->next;
604 kfree(pm);
605 }
606 }
607 }
608
609 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
610 netdev_features_t features)
611 {
612 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
613 netdev_features_t old_features = features;
614
615 features = netdev_intersect_features(features, real_dev->vlan_features);
616 features |= NETIF_F_RXCSUM;
617 features = netdev_intersect_features(features, real_dev->features);
618
619 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
620 features |= NETIF_F_LLTX;
621
622 return features;
623 }
624
625 static int vlan_ethtool_get_link_ksettings(struct net_device *dev,
626 struct ethtool_link_ksettings *cmd)
627 {
628 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
629
630 return __ethtool_get_link_ksettings(vlan->real_dev, cmd);
631 }
632
633 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
634 struct ethtool_drvinfo *info)
635 {
636 strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
637 strlcpy(info->version, vlan_version, sizeof(info->version));
638 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
639 }
640
641 static int vlan_ethtool_get_ts_info(struct net_device *dev,
642 struct ethtool_ts_info *info)
643 {
644 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
645 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
646
647 if (ops->get_ts_info) {
648 return ops->get_ts_info(vlan->real_dev, info);
649 } else {
650 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
651 SOF_TIMESTAMPING_SOFTWARE;
652 info->phc_index = -1;
653 }
654
655 return 0;
656 }
657
658 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
659 {
660 struct vlan_pcpu_stats *p;
661 u32 rx_errors = 0, tx_dropped = 0;
662 int i;
663
664 for_each_possible_cpu(i) {
665 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
666 unsigned int start;
667
668 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
669 do {
670 start = u64_stats_fetch_begin_irq(&p->syncp);
671 rxpackets = p->rx_packets;
672 rxbytes = p->rx_bytes;
673 rxmulticast = p->rx_multicast;
674 txpackets = p->tx_packets;
675 txbytes = p->tx_bytes;
676 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
677
678 stats->rx_packets += rxpackets;
679 stats->rx_bytes += rxbytes;
680 stats->multicast += rxmulticast;
681 stats->tx_packets += txpackets;
682 stats->tx_bytes += txbytes;
683 /* rx_errors & tx_dropped are u32 */
684 rx_errors += p->rx_errors;
685 tx_dropped += p->tx_dropped;
686 }
687 stats->rx_errors = rx_errors;
688 stats->tx_dropped = tx_dropped;
689
690 return stats;
691 }
692
693 #ifdef CONFIG_NET_POLL_CONTROLLER
694 static void vlan_dev_poll_controller(struct net_device *dev)
695 {
696 return;
697 }
698
699 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
700 {
701 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
702 struct net_device *real_dev = vlan->real_dev;
703 struct netpoll *netpoll;
704 int err = 0;
705
706 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
707 err = -ENOMEM;
708 if (!netpoll)
709 goto out;
710
711 err = __netpoll_setup(netpoll, real_dev);
712 if (err) {
713 kfree(netpoll);
714 goto out;
715 }
716
717 vlan->netpoll = netpoll;
718
719 out:
720 return err;
721 }
722
723 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
724 {
725 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
726 struct netpoll *netpoll = vlan->netpoll;
727
728 if (!netpoll)
729 return;
730
731 vlan->netpoll = NULL;
732
733 __netpoll_free_async(netpoll);
734 }
735 #endif /* CONFIG_NET_POLL_CONTROLLER */
736
737 static int vlan_dev_get_iflink(const struct net_device *dev)
738 {
739 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
740
741 return real_dev->ifindex;
742 }
743
744 static const struct ethtool_ops vlan_ethtool_ops = {
745 .get_link_ksettings = vlan_ethtool_get_link_ksettings,
746 .get_drvinfo = vlan_ethtool_get_drvinfo,
747 .get_link = ethtool_op_get_link,
748 .get_ts_info = vlan_ethtool_get_ts_info,
749 };
750
751 static const struct net_device_ops vlan_netdev_ops = {
752 .ndo_change_mtu = vlan_dev_change_mtu,
753 .ndo_init = vlan_dev_init,
754 .ndo_uninit = vlan_dev_uninit,
755 .ndo_open = vlan_dev_open,
756 .ndo_stop = vlan_dev_stop,
757 .ndo_start_xmit = vlan_dev_hard_start_xmit,
758 .ndo_validate_addr = eth_validate_addr,
759 .ndo_set_mac_address = vlan_dev_set_mac_address,
760 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
761 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
762 .ndo_do_ioctl = vlan_dev_ioctl,
763 .ndo_neigh_setup = vlan_dev_neigh_setup,
764 .ndo_get_stats64 = vlan_dev_get_stats64,
765 #if IS_ENABLED(CONFIG_FCOE)
766 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
767 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
768 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
769 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
770 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
771 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
772 #endif
773 #ifdef CONFIG_NET_POLL_CONTROLLER
774 .ndo_poll_controller = vlan_dev_poll_controller,
775 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
776 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
777 #endif
778 .ndo_fix_features = vlan_dev_fix_features,
779 .ndo_fdb_add = switchdev_port_fdb_add,
780 .ndo_fdb_del = switchdev_port_fdb_del,
781 .ndo_fdb_dump = switchdev_port_fdb_dump,
782 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
783 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
784 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
785 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass,
786 .ndo_get_iflink = vlan_dev_get_iflink,
787 };
788
789 static void vlan_dev_free(struct net_device *dev)
790 {
791 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
792
793 free_percpu(vlan->vlan_pcpu_stats);
794 vlan->vlan_pcpu_stats = NULL;
795 free_netdev(dev);
796 }
797
798 void vlan_setup(struct net_device *dev)
799 {
800 ether_setup(dev);
801
802 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE;
803 dev->priv_flags |= IFF_UNICAST_FLT;
804 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
805 netif_keep_dst(dev);
806
807 dev->netdev_ops = &vlan_netdev_ops;
808 dev->destructor = vlan_dev_free;
809 dev->ethtool_ops = &vlan_ethtool_ops;
810
811 eth_zero_addr(dev->broadcast);
812 }
Linux kernel - Deliverables
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