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block: Add submit_bio_wait(), remove from md
[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/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 | VLAN_FLAG_MVRP))
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
276 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
277 if (vlan->flags & VLAN_FLAG_MVRP)
278 vlan_mvrp_request_join(dev);
279 else
280 vlan_mvrp_request_leave(dev);
281 }
282 return 0;
283 }
284
285 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
286 {
287 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
288 }
289
290 static int vlan_dev_open(struct net_device *dev)
291 {
292 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
293 struct net_device *real_dev = vlan->real_dev;
294 int err;
295
296 if (!(real_dev->flags & IFF_UP) &&
297 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
298 return -ENETDOWN;
299
300 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) {
301 err = dev_uc_add(real_dev, dev->dev_addr);
302 if (err < 0)
303 goto out;
304 }
305
306 if (dev->flags & IFF_ALLMULTI) {
307 err = dev_set_allmulti(real_dev, 1);
308 if (err < 0)
309 goto del_unicast;
310 }
311 if (dev->flags & IFF_PROMISC) {
312 err = dev_set_promiscuity(real_dev, 1);
313 if (err < 0)
314 goto clear_allmulti;
315 }
316
317 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
318
319 if (vlan->flags & VLAN_FLAG_GVRP)
320 vlan_gvrp_request_join(dev);
321
322 if (vlan->flags & VLAN_FLAG_MVRP)
323 vlan_mvrp_request_join(dev);
324
325 if (netif_carrier_ok(real_dev))
326 netif_carrier_on(dev);
327 return 0;
328
329 clear_allmulti:
330 if (dev->flags & IFF_ALLMULTI)
331 dev_set_allmulti(real_dev, -1);
332 del_unicast:
333 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
334 dev_uc_del(real_dev, dev->dev_addr);
335 out:
336 netif_carrier_off(dev);
337 return err;
338 }
339
340 static int vlan_dev_stop(struct net_device *dev)
341 {
342 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
343 struct net_device *real_dev = vlan->real_dev;
344
345 dev_mc_unsync(real_dev, dev);
346 dev_uc_unsync(real_dev, dev);
347 if (dev->flags & IFF_ALLMULTI)
348 dev_set_allmulti(real_dev, -1);
349 if (dev->flags & IFF_PROMISC)
350 dev_set_promiscuity(real_dev, -1);
351
352 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
353 dev_uc_del(real_dev, dev->dev_addr);
354
355 netif_carrier_off(dev);
356 return 0;
357 }
358
359 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
360 {
361 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
362 struct sockaddr *addr = p;
363 int err;
364
365 if (!is_valid_ether_addr(addr->sa_data))
366 return -EADDRNOTAVAIL;
367
368 if (!(dev->flags & IFF_UP))
369 goto out;
370
371 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
372 err = dev_uc_add(real_dev, addr->sa_data);
373 if (err < 0)
374 return err;
375 }
376
377 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
378 dev_uc_del(real_dev, dev->dev_addr);
379
380 out:
381 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
382 return 0;
383 }
384
385 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
386 {
387 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
388 const struct net_device_ops *ops = real_dev->netdev_ops;
389 struct ifreq ifrr;
390 int err = -EOPNOTSUPP;
391
392 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
393 ifrr.ifr_ifru = ifr->ifr_ifru;
394
395 switch (cmd) {
396 case SIOCGMIIPHY:
397 case SIOCGMIIREG:
398 case SIOCSMIIREG:
399 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
400 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
401 break;
402 }
403
404 if (!err)
405 ifr->ifr_ifru = ifrr.ifr_ifru;
406
407 return err;
408 }
409
410 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
411 {
412 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
413 const struct net_device_ops *ops = real_dev->netdev_ops;
414 int err = 0;
415
416 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
417 err = ops->ndo_neigh_setup(real_dev, pa);
418
419 return err;
420 }
421
422 #if IS_ENABLED(CONFIG_FCOE)
423 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
424 struct scatterlist *sgl, unsigned int sgc)
425 {
426 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
427 const struct net_device_ops *ops = real_dev->netdev_ops;
428 int rc = 0;
429
430 if (ops->ndo_fcoe_ddp_setup)
431 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
432
433 return rc;
434 }
435
436 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
437 {
438 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
439 const struct net_device_ops *ops = real_dev->netdev_ops;
440 int len = 0;
441
442 if (ops->ndo_fcoe_ddp_done)
443 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
444
445 return len;
446 }
447
448 static int vlan_dev_fcoe_enable(struct net_device *dev)
449 {
450 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
451 const struct net_device_ops *ops = real_dev->netdev_ops;
452 int rc = -EINVAL;
453
454 if (ops->ndo_fcoe_enable)
455 rc = ops->ndo_fcoe_enable(real_dev);
456 return rc;
457 }
458
459 static int vlan_dev_fcoe_disable(struct net_device *dev)
460 {
461 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
462 const struct net_device_ops *ops = real_dev->netdev_ops;
463 int rc = -EINVAL;
464
465 if (ops->ndo_fcoe_disable)
466 rc = ops->ndo_fcoe_disable(real_dev);
467 return rc;
468 }
469
470 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
471 {
472 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
473 const struct net_device_ops *ops = real_dev->netdev_ops;
474 int rc = -EINVAL;
475
476 if (ops->ndo_fcoe_get_wwn)
477 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
478 return rc;
479 }
480
481 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
482 struct scatterlist *sgl, unsigned int sgc)
483 {
484 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
485 const struct net_device_ops *ops = real_dev->netdev_ops;
486 int rc = 0;
487
488 if (ops->ndo_fcoe_ddp_target)
489 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
490
491 return rc;
492 }
493 #endif
494
495 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
496 {
497 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
498
499 if (dev->flags & IFF_UP) {
500 if (change & IFF_ALLMULTI)
501 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
502 if (change & IFF_PROMISC)
503 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
504 }
505 }
506
507 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
508 {
509 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
510 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
511 }
512
513 /*
514 * vlan network devices have devices nesting below it, and are a special
515 * "super class" of normal network devices; split their locks off into a
516 * separate class since they always nest.
517 */
518 static struct lock_class_key vlan_netdev_xmit_lock_key;
519 static struct lock_class_key vlan_netdev_addr_lock_key;
520
521 static void vlan_dev_set_lockdep_one(struct net_device *dev,
522 struct netdev_queue *txq,
523 void *_subclass)
524 {
525 lockdep_set_class_and_subclass(&txq->_xmit_lock,
526 &vlan_netdev_xmit_lock_key,
527 *(int *)_subclass);
528 }
529
530 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
531 {
532 lockdep_set_class_and_subclass(&dev->addr_list_lock,
533 &vlan_netdev_addr_lock_key,
534 subclass);
535 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
536 }
537
538 static const struct header_ops vlan_header_ops = {
539 .create = vlan_dev_hard_header,
540 .rebuild = vlan_dev_rebuild_header,
541 .parse = eth_header_parse,
542 };
543
544 static struct device_type vlan_type = {
545 .name = "vlan",
546 };
547
548 static const struct net_device_ops vlan_netdev_ops;
549
550 static int vlan_dev_init(struct net_device *dev)
551 {
552 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
553 int subclass = 0;
554
555 netif_carrier_off(dev);
556
557 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
558 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
559 IFF_MASTER | IFF_SLAVE);
560 dev->iflink = real_dev->ifindex;
561 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
562 (1<<__LINK_STATE_DORMANT))) |
563 (1<<__LINK_STATE_PRESENT);
564
565 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG |
566 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO |
567 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM |
568 NETIF_F_ALL_FCOE;
569
570 dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
571 dev->gso_max_size = real_dev->gso_max_size;
572
573 /* ipv6 shared card related stuff */
574 dev->dev_id = real_dev->dev_id;
575
576 if (is_zero_ether_addr(dev->dev_addr))
577 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
578 if (is_zero_ether_addr(dev->broadcast))
579 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
580
581 #if IS_ENABLED(CONFIG_FCOE)
582 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
583 #endif
584
585 dev->needed_headroom = real_dev->needed_headroom;
586 if (real_dev->features & NETIF_F_HW_VLAN_TX) {
587 dev->header_ops = real_dev->header_ops;
588 dev->hard_header_len = real_dev->hard_header_len;
589 } else {
590 dev->header_ops = &vlan_header_ops;
591 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
592 }
593
594 dev->netdev_ops = &vlan_netdev_ops;
595
596 SET_NETDEV_DEVTYPE(dev, &vlan_type);
597
598 if (is_vlan_dev(real_dev))
599 subclass = 1;
600
601 vlan_dev_set_lockdep_class(dev, subclass);
602
603 vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
604 if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
605 return -ENOMEM;
606
607 return 0;
608 }
609
610 static void vlan_dev_uninit(struct net_device *dev)
611 {
612 struct vlan_priority_tci_mapping *pm;
613 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
614 int i;
615
616 free_percpu(vlan->vlan_pcpu_stats);
617 vlan->vlan_pcpu_stats = NULL;
618 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
619 while ((pm = vlan->egress_priority_map[i]) != NULL) {
620 vlan->egress_priority_map[i] = pm->next;
621 kfree(pm);
622 }
623 }
624 }
625
626 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
627 netdev_features_t features)
628 {
629 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
630 u32 old_features = features;
631
632 features &= real_dev->vlan_features;
633 features |= NETIF_F_RXCSUM;
634 features &= real_dev->features;
635
636 features |= old_features & NETIF_F_SOFT_FEATURES;
637 features |= NETIF_F_LLTX;
638
639 return features;
640 }
641
642 static int vlan_ethtool_get_settings(struct net_device *dev,
643 struct ethtool_cmd *cmd)
644 {
645 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
646
647 return __ethtool_get_settings(vlan->real_dev, cmd);
648 }
649
650 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
651 struct ethtool_drvinfo *info)
652 {
653 strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
654 strlcpy(info->version, vlan_version, sizeof(info->version));
655 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
656 }
657
658 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
659 {
660
661 if (vlan_dev_priv(dev)->vlan_pcpu_stats) {
662 struct vlan_pcpu_stats *p;
663 u32 rx_errors = 0, tx_dropped = 0;
664 int i;
665
666 for_each_possible_cpu(i) {
667 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
668 unsigned int start;
669
670 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
671 do {
672 start = u64_stats_fetch_begin_bh(&p->syncp);
673 rxpackets = p->rx_packets;
674 rxbytes = p->rx_bytes;
675 rxmulticast = p->rx_multicast;
676 txpackets = p->tx_packets;
677 txbytes = p->tx_bytes;
678 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
679
680 stats->rx_packets += rxpackets;
681 stats->rx_bytes += rxbytes;
682 stats->multicast += rxmulticast;
683 stats->tx_packets += txpackets;
684 stats->tx_bytes += txbytes;
685 /* rx_errors & tx_dropped are u32 */
686 rx_errors += p->rx_errors;
687 tx_dropped += p->tx_dropped;
688 }
689 stats->rx_errors = rx_errors;
690 stats->tx_dropped = tx_dropped;
691 }
692 return stats;
693 }
694
695 #ifdef CONFIG_NET_POLL_CONTROLLER
696 static void vlan_dev_poll_controller(struct net_device *dev)
697 {
698 return;
699 }
700
701 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo,
702 gfp_t gfp)
703 {
704 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
705 struct net_device *real_dev = vlan->real_dev;
706 struct netpoll *netpoll;
707 int err = 0;
708
709 netpoll = kzalloc(sizeof(*netpoll), gfp);
710 err = -ENOMEM;
711 if (!netpoll)
712 goto out;
713
714 err = __netpoll_setup(netpoll, real_dev, gfp);
715 if (err) {
716 kfree(netpoll);
717 goto out;
718 }
719
720 vlan->netpoll = netpoll;
721
722 out:
723 return err;
724 }
725
726 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
727 {
728 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
729 struct netpoll *netpoll = vlan->netpoll;
730
731 if (!netpoll)
732 return;
733
734 vlan->netpoll = NULL;
735
736 __netpoll_free_async(netpoll);
737 }
738 #endif /* CONFIG_NET_POLL_CONTROLLER */
739
740 static const struct ethtool_ops vlan_ethtool_ops = {
741 .get_settings = vlan_ethtool_get_settings,
742 .get_drvinfo = vlan_ethtool_get_drvinfo,
743 .get_link = ethtool_op_get_link,
744 };
745
746 static const struct net_device_ops vlan_netdev_ops = {
747 .ndo_change_mtu = vlan_dev_change_mtu,
748 .ndo_init = vlan_dev_init,
749 .ndo_uninit = vlan_dev_uninit,
750 .ndo_open = vlan_dev_open,
751 .ndo_stop = vlan_dev_stop,
752 .ndo_start_xmit = vlan_dev_hard_start_xmit,
753 .ndo_validate_addr = eth_validate_addr,
754 .ndo_set_mac_address = vlan_dev_set_mac_address,
755 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
756 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
757 .ndo_do_ioctl = vlan_dev_ioctl,
758 .ndo_neigh_setup = vlan_dev_neigh_setup,
759 .ndo_get_stats64 = vlan_dev_get_stats64,
760 #if IS_ENABLED(CONFIG_FCOE)
761 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
762 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
763 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
764 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
765 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
766 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
767 #endif
768 #ifdef CONFIG_NET_POLL_CONTROLLER
769 .ndo_poll_controller = vlan_dev_poll_controller,
770 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
771 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
772 #endif
773 .ndo_fix_features = vlan_dev_fix_features,
774 };
775
776 void vlan_setup(struct net_device *dev)
777 {
778 ether_setup(dev);
779
780 dev->priv_flags |= IFF_802_1Q_VLAN;
781 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
782 dev->tx_queue_len = 0;
783
784 dev->netdev_ops = &vlan_netdev_ops;
785 dev->destructor = free_netdev;
786 dev->ethtool_ops = &vlan_ethtool_ops;
787
788 memset(dev->broadcast, 0, ETH_ALEN);
789 }
Linux kernel - Deliverables
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