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sfc: Report software timestamping capabilities
[linux-2.6.git] / net / 8021q / vlan_dev.c
blob3a8c8fd63c88e2c204a8f1ac3b6dc4eb3f15cc63
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_dev_priv *vlan = vlan_dev_priv(dev);
103 struct vlan_hdr *vhdr;
104 unsigned int vhdrlen = 0;
105 u16 vlan_tci = 0;
106 int rc;
107
108 if (!(vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
109 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
110
111 vlan_tci = vlan_dev_priv(dev)->vlan_id;
112 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
113 vhdr->h_vlan_TCI = htons(vlan_tci);
114
115 /*
116 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
117 * put the length in here instead.
118 */
119 if (type != ETH_P_802_3 && type != ETH_P_802_2)
120 vhdr->h_vlan_encapsulated_proto = htons(type);
121 else
122 vhdr->h_vlan_encapsulated_proto = htons(len);
123
124 skb->protocol = vlan->vlan_proto;
125 type = ntohs(vlan->vlan_proto);
126 vhdrlen = VLAN_HLEN;
127 }
128
129 /* Before delegating work to the lower layer, enter our MAC-address */
130 if (saddr == NULL)
131 saddr = dev->dev_addr;
132
133 /* Now make the underlying real hard header */
134 dev = vlan_dev_priv(dev)->real_dev;
135 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
136 if (rc > 0)
137 rc += vhdrlen;
138 return rc;
139 }
140
141 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
142 {
143 #ifdef CONFIG_NET_POLL_CONTROLLER
144 if (vlan->netpoll)
145 netpoll_send_skb(vlan->netpoll, skb);
146 #else
147 BUG();
148 #endif
149 return NETDEV_TX_OK;
150 }
151
152 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
153 struct net_device *dev)
154 {
155 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
156 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
157 unsigned int len;
158 int ret;
159
160 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
161 *
162 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
163 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
164 */
165 if (veth->h_vlan_proto != vlan->vlan_proto ||
166 vlan->flags & VLAN_FLAG_REORDER_HDR) {
167 u16 vlan_tci;
168 vlan_tci = vlan->vlan_id;
169 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
170 skb = __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
171 }
172
173 skb->dev = vlan->real_dev;
174 len = skb->len;
175 if (unlikely(netpoll_tx_running(dev)))
176 return vlan_netpoll_send_skb(vlan, skb);
177
178 ret = dev_queue_xmit(skb);
179
180 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
181 struct vlan_pcpu_stats *stats;
182
183 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
184 u64_stats_update_begin(&stats->syncp);
185 stats->tx_packets++;
186 stats->tx_bytes += len;
187 u64_stats_update_end(&stats->syncp);
188 } else {
189 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
190 }
191
192 return ret;
193 }
194
195 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
196 {
197 /* TODO: gotta make sure the underlying layer can handle it,
198 * maybe an IFF_VLAN_CAPABLE flag for devices?
199 */
200 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu)
201 return -ERANGE;
202
203 dev->mtu = new_mtu;
204
205 return 0;
206 }
207
208 void vlan_dev_set_ingress_priority(const struct net_device *dev,
209 u32 skb_prio, u16 vlan_prio)
210 {
211 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
212
213 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
214 vlan->nr_ingress_mappings--;
215 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
216 vlan->nr_ingress_mappings++;
217
218 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
219 }
220
221 int vlan_dev_set_egress_priority(const struct net_device *dev,
222 u32 skb_prio, u16 vlan_prio)
223 {
224 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
225 struct vlan_priority_tci_mapping *mp = NULL;
226 struct vlan_priority_tci_mapping *np;
227 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
228
229 /* See if a priority mapping exists.. */
230 mp = vlan->egress_priority_map[skb_prio & 0xF];
231 while (mp) {
232 if (mp->priority == skb_prio) {
233 if (mp->vlan_qos && !vlan_qos)
234 vlan->nr_egress_mappings--;
235 else if (!mp->vlan_qos && vlan_qos)
236 vlan->nr_egress_mappings++;
237 mp->vlan_qos = vlan_qos;
238 return 0;
239 }
240 mp = mp->next;
241 }
242
243 /* Create a new mapping then. */
244 mp = vlan->egress_priority_map[skb_prio & 0xF];
245 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
246 if (!np)
247 return -ENOBUFS;
248
249 np->next = mp;
250 np->priority = skb_prio;
251 np->vlan_qos = vlan_qos;
252 vlan->egress_priority_map[skb_prio & 0xF] = np;
253 if (vlan_qos)
254 vlan->nr_egress_mappings++;
255 return 0;
256 }
257
258 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
259 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
260 {
261 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
262 u32 old_flags = vlan->flags;
263
264 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
265 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
266 return -EINVAL;
267
268 vlan->flags = (old_flags & ~mask) | (flags & mask);
269
270 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
271 if (vlan->flags & VLAN_FLAG_GVRP)
272 vlan_gvrp_request_join(dev);
273 else
274 vlan_gvrp_request_leave(dev);
275 }
276
277 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
278 if (vlan->flags & VLAN_FLAG_MVRP)
279 vlan_mvrp_request_join(dev);
280 else
281 vlan_mvrp_request_leave(dev);
282 }
283 return 0;
284 }
285
286 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
287 {
288 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
289 }
290
291 static int vlan_dev_open(struct net_device *dev)
292 {
293 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
294 struct net_device *real_dev = vlan->real_dev;
295 int err;
296
297 if (!(real_dev->flags & IFF_UP) &&
298 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
299 return -ENETDOWN;
300
301 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) {
302 err = dev_uc_add(real_dev, dev->dev_addr);
303 if (err < 0)
304 goto out;
305 }
306
307 if (dev->flags & IFF_ALLMULTI) {
308 err = dev_set_allmulti(real_dev, 1);
309 if (err < 0)
310 goto del_unicast;
311 }
312 if (dev->flags & IFF_PROMISC) {
313 err = dev_set_promiscuity(real_dev, 1);
314 if (err < 0)
315 goto clear_allmulti;
316 }
317
318 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
319
320 if (vlan->flags & VLAN_FLAG_GVRP)
321 vlan_gvrp_request_join(dev);
322
323 if (vlan->flags & VLAN_FLAG_MVRP)
324 vlan_mvrp_request_join(dev);
325
326 if (netif_carrier_ok(real_dev))
327 netif_carrier_on(dev);
328 return 0;
329
330 clear_allmulti:
331 if (dev->flags & IFF_ALLMULTI)
332 dev_set_allmulti(real_dev, -1);
333 del_unicast:
334 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
335 dev_uc_del(real_dev, dev->dev_addr);
336 out:
337 netif_carrier_off(dev);
338 return err;
339 }
340
341 static int vlan_dev_stop(struct net_device *dev)
342 {
343 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
344 struct net_device *real_dev = vlan->real_dev;
345
346 dev_mc_unsync(real_dev, dev);
347 dev_uc_unsync(real_dev, dev);
348 if (dev->flags & IFF_ALLMULTI)
349 dev_set_allmulti(real_dev, -1);
350 if (dev->flags & IFF_PROMISC)
351 dev_set_promiscuity(real_dev, -1);
352
353 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
354 dev_uc_del(real_dev, dev->dev_addr);
355
356 netif_carrier_off(dev);
357 return 0;
358 }
359
360 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
361 {
362 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
363 struct sockaddr *addr = p;
364 int err;
365
366 if (!is_valid_ether_addr(addr->sa_data))
367 return -EADDRNOTAVAIL;
368
369 if (!(dev->flags & IFF_UP))
370 goto out;
371
372 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
373 err = dev_uc_add(real_dev, addr->sa_data);
374 if (err < 0)
375 return err;
376 }
377
378 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
379 dev_uc_del(real_dev, dev->dev_addr);
380
381 out:
382 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
383 return 0;
384 }
385
386 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
387 {
388 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
389 const struct net_device_ops *ops = real_dev->netdev_ops;
390 struct ifreq ifrr;
391 int err = -EOPNOTSUPP;
392
393 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
394 ifrr.ifr_ifru = ifr->ifr_ifru;
395
396 switch (cmd) {
397 case SIOCGMIIPHY:
398 case SIOCGMIIREG:
399 case SIOCSMIIREG:
400 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
401 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
402 break;
403 }
404
405 if (!err)
406 ifr->ifr_ifru = ifrr.ifr_ifru;
407
408 return err;
409 }
410
411 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
412 {
413 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
414 const struct net_device_ops *ops = real_dev->netdev_ops;
415 int err = 0;
416
417 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
418 err = ops->ndo_neigh_setup(real_dev, pa);
419
420 return err;
421 }
422
423 #if IS_ENABLED(CONFIG_FCOE)
424 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
425 struct scatterlist *sgl, unsigned int sgc)
426 {
427 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
428 const struct net_device_ops *ops = real_dev->netdev_ops;
429 int rc = 0;
430
431 if (ops->ndo_fcoe_ddp_setup)
432 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
433
434 return rc;
435 }
436
437 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
438 {
439 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
440 const struct net_device_ops *ops = real_dev->netdev_ops;
441 int len = 0;
442
443 if (ops->ndo_fcoe_ddp_done)
444 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
445
446 return len;
447 }
448
449 static int vlan_dev_fcoe_enable(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_enable)
456 rc = ops->ndo_fcoe_enable(real_dev);
457 return rc;
458 }
459
460 static int vlan_dev_fcoe_disable(struct net_device *dev)
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_disable)
467 rc = ops->ndo_fcoe_disable(real_dev);
468 return rc;
469 }
470
471 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
472 {
473 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
474 const struct net_device_ops *ops = real_dev->netdev_ops;
475 int rc = -EINVAL;
476
477 if (ops->ndo_fcoe_get_wwn)
478 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
479 return rc;
480 }
481
482 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
483 struct scatterlist *sgl, unsigned int sgc)
484 {
485 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
486 const struct net_device_ops *ops = real_dev->netdev_ops;
487 int rc = 0;
488
489 if (ops->ndo_fcoe_ddp_target)
490 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
491
492 return rc;
493 }
494 #endif
495
496 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
497 {
498 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
499
500 if (dev->flags & IFF_UP) {
501 if (change & IFF_ALLMULTI)
502 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
503 if (change & IFF_PROMISC)
504 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
505 }
506 }
507
508 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
509 {
510 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
511 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
512 }
513
514 /*
515 * vlan network devices have devices nesting below it, and are a special
516 * "super class" of normal network devices; split their locks off into a
517 * separate class since they always nest.
518 */
519 static struct lock_class_key vlan_netdev_xmit_lock_key;
520 static struct lock_class_key vlan_netdev_addr_lock_key;
521
522 static void vlan_dev_set_lockdep_one(struct net_device *dev,
523 struct netdev_queue *txq,
524 void *_subclass)
525 {
526 lockdep_set_class_and_subclass(&txq->_xmit_lock,
527 &vlan_netdev_xmit_lock_key,
528 *(int *)_subclass);
529 }
530
531 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
532 {
533 lockdep_set_class_and_subclass(&dev->addr_list_lock,
534 &vlan_netdev_addr_lock_key,
535 subclass);
536 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
537 }
538
539 static const struct header_ops vlan_header_ops = {
540 .create = vlan_dev_hard_header,
541 .rebuild = vlan_dev_rebuild_header,
542 .parse = eth_header_parse,
543 };
544
545 static struct device_type vlan_type = {
546 .name = "vlan",
547 };
548
549 static const struct net_device_ops vlan_netdev_ops;
550
551 static int vlan_dev_init(struct net_device *dev)
552 {
553 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
554 int subclass = 0;
555
556 netif_carrier_off(dev);
557
558 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
559 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
560 IFF_MASTER | IFF_SLAVE);
561 dev->iflink = real_dev->ifindex;
562 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
563 (1<<__LINK_STATE_DORMANT))) |
564 (1<<__LINK_STATE_PRESENT);
565
566 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG |
567 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO |
568 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM |
569 NETIF_F_ALL_FCOE;
570
571 dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
572 dev->gso_max_size = real_dev->gso_max_size;
573
574 /* ipv6 shared card related stuff */
575 dev->dev_id = real_dev->dev_id;
576
577 if (is_zero_ether_addr(dev->dev_addr))
578 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
579 if (is_zero_ether_addr(dev->broadcast))
580 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
581
582 #if IS_ENABLED(CONFIG_FCOE)
583 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
584 #endif
585
586 dev->needed_headroom = real_dev->needed_headroom;
587 if (real_dev->features & NETIF_F_HW_VLAN_CTAG_TX) {
588 dev->header_ops = real_dev->header_ops;
589 dev->hard_header_len = real_dev->hard_header_len;
590 } else {
591 dev->header_ops = &vlan_header_ops;
592 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
593 }
594
595 dev->netdev_ops = &vlan_netdev_ops;
596
597 SET_NETDEV_DEVTYPE(dev, &vlan_type);
598
599 if (is_vlan_dev(real_dev))
600 subclass = 1;
601
602 vlan_dev_set_lockdep_class(dev, subclass);
603
604 vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
605 if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
606 return -ENOMEM;
607
608 return 0;
609 }
610
611 static void vlan_dev_uninit(struct net_device *dev)
612 {
613 struct vlan_priority_tci_mapping *pm;
614 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
615 int i;
616
617 free_percpu(vlan->vlan_pcpu_stats);
618 vlan->vlan_pcpu_stats = NULL;
619 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
620 while ((pm = vlan->egress_priority_map[i]) != NULL) {
621 vlan->egress_priority_map[i] = pm->next;
622 kfree(pm);
623 }
624 }
625 }
626
627 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
628 netdev_features_t features)
629 {
630 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
631 netdev_features_t old_features = features;
632
633 features &= real_dev->vlan_features;
634 features |= NETIF_F_RXCSUM;
635 features &= real_dev->features;
636
637 features |= old_features & NETIF_F_SOFT_FEATURES;
638 features |= NETIF_F_LLTX;
639
640 return features;
641 }
642
643 static int vlan_ethtool_get_settings(struct net_device *dev,
644 struct ethtool_cmd *cmd)
645 {
646 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
647
648 return __ethtool_get_settings(vlan->real_dev, cmd);
649 }
650
651 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
652 struct ethtool_drvinfo *info)
653 {
654 strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
655 strlcpy(info->version, vlan_version, sizeof(info->version));
656 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
657 }
658
659 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
660 {
661
662 if (vlan_dev_priv(dev)->vlan_pcpu_stats) {
663 struct vlan_pcpu_stats *p;
664 u32 rx_errors = 0, tx_dropped = 0;
665 int i;
666
667 for_each_possible_cpu(i) {
668 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
669 unsigned int start;
670
671 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
672 do {
673 start = u64_stats_fetch_begin_bh(&p->syncp);
674 rxpackets = p->rx_packets;
675 rxbytes = p->rx_bytes;
676 rxmulticast = p->rx_multicast;
677 txpackets = p->tx_packets;
678 txbytes = p->tx_bytes;
679 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
680
681 stats->rx_packets += rxpackets;
682 stats->rx_bytes += rxbytes;
683 stats->multicast += rxmulticast;
684 stats->tx_packets += txpackets;
685 stats->tx_bytes += txbytes;
686 /* rx_errors & tx_dropped are u32 */
687 rx_errors += p->rx_errors;
688 tx_dropped += p->tx_dropped;
689 }
690 stats->rx_errors = rx_errors;
691 stats->tx_dropped = tx_dropped;
692 }
693 return stats;
694 }
695
696 #ifdef CONFIG_NET_POLL_CONTROLLER
697 static void vlan_dev_poll_controller(struct net_device *dev)
698 {
699 return;
700 }
701
702 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo,
703 gfp_t gfp)
704 {
705 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
706 struct net_device *real_dev = vlan->real_dev;
707 struct netpoll *netpoll;
708 int err = 0;
709
710 netpoll = kzalloc(sizeof(*netpoll), gfp);
711 err = -ENOMEM;
712 if (!netpoll)
713 goto out;
714
715 err = __netpoll_setup(netpoll, real_dev, gfp);
716 if (err) {
717 kfree(netpoll);
718 goto out;
719 }
720
721 vlan->netpoll = netpoll;
722
723 out:
724 return err;
725 }
726
727 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
728 {
729 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
730 struct netpoll *netpoll = vlan->netpoll;
731
732 if (!netpoll)
733 return;
734
735 vlan->netpoll = NULL;
736
737 __netpoll_free_async(netpoll);
738 }
739 #endif /* CONFIG_NET_POLL_CONTROLLER */
740
741 static const struct ethtool_ops vlan_ethtool_ops = {
742 .get_settings = vlan_ethtool_get_settings,
743 .get_drvinfo = vlan_ethtool_get_drvinfo,
744 .get_link = ethtool_op_get_link,
745 };
746
747 static const struct net_device_ops vlan_netdev_ops = {
748 .ndo_change_mtu = vlan_dev_change_mtu,
749 .ndo_init = vlan_dev_init,
750 .ndo_uninit = vlan_dev_uninit,
751 .ndo_open = vlan_dev_open,
752 .ndo_stop = vlan_dev_stop,
753 .ndo_start_xmit = vlan_dev_hard_start_xmit,
754 .ndo_validate_addr = eth_validate_addr,
755 .ndo_set_mac_address = vlan_dev_set_mac_address,
756 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
757 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
758 .ndo_do_ioctl = vlan_dev_ioctl,
759 .ndo_neigh_setup = vlan_dev_neigh_setup,
760 .ndo_get_stats64 = vlan_dev_get_stats64,
761 #if IS_ENABLED(CONFIG_FCOE)
762 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
763 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
764 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
765 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
766 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
767 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
768 #endif
769 #ifdef CONFIG_NET_POLL_CONTROLLER
770 .ndo_poll_controller = vlan_dev_poll_controller,
771 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
772 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
773 #endif
774 .ndo_fix_features = vlan_dev_fix_features,
775 };
776
777 void vlan_setup(struct net_device *dev)
778 {
779 ether_setup(dev);
780
781 dev->priv_flags |= IFF_802_1Q_VLAN;
782 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
783 dev->tx_queue_len = 0;
784
785 dev->netdev_ops = &vlan_netdev_ops;
786 dev->destructor = free_netdev;
787 dev->ethtool_ops = &vlan_ethtool_ops;
788
789 memset(dev->broadcast, 0, ETH_ALEN);
790 }
Linus' kernel tree