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tipc: add missing dev_put() on error in tipc_enable_l2_media
[linux/fpc-iii.git] / net / 8021q / vlan_dev.c
blob546af0e73ac343a7f1d792ab2f0f5227fd25e645
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 <linux/phy.h>
33 #include <net/arp.h>
34 #include <net/switchdev.h>
35
36 #include "vlan.h"
37 #include "vlanproc.h"
38 #include <linux/if_vlan.h>
39 #include <linux/netpoll.h>
40
41 /*
42 * Create the VLAN header for an arbitrary protocol layer
43 *
44 * saddr=NULL means use device source address
45 * daddr=NULL means leave destination address (eg unresolved arp)
46 *
47 * This is called when the SKB is moving down the stack towards the
48 * physical devices.
49 */
50 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
51 unsigned short type,
52 const void *daddr, const void *saddr,
53 unsigned int len)
54 {
55 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
56 struct vlan_hdr *vhdr;
57 unsigned int vhdrlen = 0;
58 u16 vlan_tci = 0;
59 int rc;
60
61 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
62 vhdr = skb_push(skb, VLAN_HLEN);
63
64 vlan_tci = vlan->vlan_id;
65 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
66 vhdr->h_vlan_TCI = htons(vlan_tci);
67
68 /*
69 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
70 * put the length in here instead.
71 */
72 if (type != ETH_P_802_3 && type != ETH_P_802_2)
73 vhdr->h_vlan_encapsulated_proto = htons(type);
74 else
75 vhdr->h_vlan_encapsulated_proto = htons(len);
76
77 skb->protocol = vlan->vlan_proto;
78 type = ntohs(vlan->vlan_proto);
79 vhdrlen = VLAN_HLEN;
80 }
81
82 /* Before delegating work to the lower layer, enter our MAC-address */
83 if (saddr == NULL)
84 saddr = dev->dev_addr;
85
86 /* Now make the underlying real hard header */
87 dev = vlan->real_dev;
88 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
89 if (rc > 0)
90 rc += vhdrlen;
91 return rc;
92 }
93
94 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
95 {
96 #ifdef CONFIG_NET_POLL_CONTROLLER
97 if (vlan->netpoll)
98 netpoll_send_skb(vlan->netpoll, skb);
99 #else
100 BUG();
101 #endif
102 return NETDEV_TX_OK;
103 }
104
105 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
106 struct net_device *dev)
107 {
108 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
109 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
110 unsigned int len;
111 int ret;
112
113 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
114 *
115 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
116 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
117 */
118 if (veth->h_vlan_proto != vlan->vlan_proto ||
119 vlan->flags & VLAN_FLAG_REORDER_HDR) {
120 u16 vlan_tci;
121 vlan_tci = vlan->vlan_id;
122 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
123 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
124 }
125
126 skb->dev = vlan->real_dev;
127 len = skb->len;
128 if (unlikely(netpoll_tx_running(dev)))
129 return vlan_netpoll_send_skb(vlan, skb);
130
131 ret = dev_queue_xmit(skb);
132
133 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
134 struct vlan_pcpu_stats *stats;
135
136 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
137 u64_stats_update_begin(&stats->syncp);
138 stats->tx_packets++;
139 stats->tx_bytes += len;
140 u64_stats_update_end(&stats->syncp);
141 } else {
142 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
143 }
144
145 return ret;
146 }
147
148 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
149 {
150 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
151 unsigned int max_mtu = real_dev->mtu;
152
153 if (netif_reduces_vlan_mtu(real_dev))
154 max_mtu -= VLAN_HLEN;
155 if (max_mtu < new_mtu)
156 return -ERANGE;
157
158 dev->mtu = new_mtu;
159
160 return 0;
161 }
162
163 void vlan_dev_set_ingress_priority(const struct net_device *dev,
164 u32 skb_prio, u16 vlan_prio)
165 {
166 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
167
168 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
169 vlan->nr_ingress_mappings--;
170 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
171 vlan->nr_ingress_mappings++;
172
173 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
174 }
175
176 int vlan_dev_set_egress_priority(const struct net_device *dev,
177 u32 skb_prio, u16 vlan_prio)
178 {
179 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
180 struct vlan_priority_tci_mapping *mp = NULL;
181 struct vlan_priority_tci_mapping *np;
182 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
183
184 /* See if a priority mapping exists.. */
185 mp = vlan->egress_priority_map[skb_prio & 0xF];
186 while (mp) {
187 if (mp->priority == skb_prio) {
188 if (mp->vlan_qos && !vlan_qos)
189 vlan->nr_egress_mappings--;
190 else if (!mp->vlan_qos && vlan_qos)
191 vlan->nr_egress_mappings++;
192 mp->vlan_qos = vlan_qos;
193 return 0;
194 }
195 mp = mp->next;
196 }
197
198 /* Create a new mapping then. */
199 mp = vlan->egress_priority_map[skb_prio & 0xF];
200 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
201 if (!np)
202 return -ENOBUFS;
203
204 np->next = mp;
205 np->priority = skb_prio;
206 np->vlan_qos = vlan_qos;
207 /* Before inserting this element in hash table, make sure all its fields
208 * are committed to memory.
209 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
210 */
211 smp_wmb();
212 vlan->egress_priority_map[skb_prio & 0xF] = np;
213 if (vlan_qos)
214 vlan->nr_egress_mappings++;
215 return 0;
216 }
217
218 /* Flags are defined in the vlan_flags enum in
219 * include/uapi/linux/if_vlan.h file.
220 */
221 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
222 {
223 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
224 u32 old_flags = vlan->flags;
225
226 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
227 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
228 return -EINVAL;
229
230 vlan->flags = (old_flags & ~mask) | (flags & mask);
231
232 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
233 if (vlan->flags & VLAN_FLAG_GVRP)
234 vlan_gvrp_request_join(dev);
235 else
236 vlan_gvrp_request_leave(dev);
237 }
238
239 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
240 if (vlan->flags & VLAN_FLAG_MVRP)
241 vlan_mvrp_request_join(dev);
242 else
243 vlan_mvrp_request_leave(dev);
244 }
245 return 0;
246 }
247
248 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
249 {
250 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
251 }
252
253 bool vlan_dev_inherit_address(struct net_device *dev,
254 struct net_device *real_dev)
255 {
256 if (dev->addr_assign_type != NET_ADDR_STOLEN)
257 return false;
258
259 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
260 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
261 return true;
262 }
263
264 static int vlan_dev_open(struct net_device *dev)
265 {
266 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
267 struct net_device *real_dev = vlan->real_dev;
268 int err;
269
270 if (!(real_dev->flags & IFF_UP) &&
271 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
272 return -ENETDOWN;
273
274 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) &&
275 !vlan_dev_inherit_address(dev, real_dev)) {
276 err = dev_uc_add(real_dev, dev->dev_addr);
277 if (err < 0)
278 goto out;
279 }
280
281 if (dev->flags & IFF_ALLMULTI) {
282 err = dev_set_allmulti(real_dev, 1);
283 if (err < 0)
284 goto del_unicast;
285 }
286 if (dev->flags & IFF_PROMISC) {
287 err = dev_set_promiscuity(real_dev, 1);
288 if (err < 0)
289 goto clear_allmulti;
290 }
291
292 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
293
294 if (vlan->flags & VLAN_FLAG_GVRP)
295 vlan_gvrp_request_join(dev);
296
297 if (vlan->flags & VLAN_FLAG_MVRP)
298 vlan_mvrp_request_join(dev);
299
300 if (netif_carrier_ok(real_dev))
301 netif_carrier_on(dev);
302 return 0;
303
304 clear_allmulti:
305 if (dev->flags & IFF_ALLMULTI)
306 dev_set_allmulti(real_dev, -1);
307 del_unicast:
308 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
309 dev_uc_del(real_dev, dev->dev_addr);
310 out:
311 netif_carrier_off(dev);
312 return err;
313 }
314
315 static int vlan_dev_stop(struct net_device *dev)
316 {
317 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
318 struct net_device *real_dev = vlan->real_dev;
319
320 dev_mc_unsync(real_dev, dev);
321 dev_uc_unsync(real_dev, dev);
322 if (dev->flags & IFF_ALLMULTI)
323 dev_set_allmulti(real_dev, -1);
324 if (dev->flags & IFF_PROMISC)
325 dev_set_promiscuity(real_dev, -1);
326
327 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
328 dev_uc_del(real_dev, dev->dev_addr);
329
330 netif_carrier_off(dev);
331 return 0;
332 }
333
334 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
335 {
336 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
337 struct sockaddr *addr = p;
338 int err;
339
340 if (!is_valid_ether_addr(addr->sa_data))
341 return -EADDRNOTAVAIL;
342
343 if (!(dev->flags & IFF_UP))
344 goto out;
345
346 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
347 err = dev_uc_add(real_dev, addr->sa_data);
348 if (err < 0)
349 return err;
350 }
351
352 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
353 dev_uc_del(real_dev, dev->dev_addr);
354
355 out:
356 ether_addr_copy(dev->dev_addr, addr->sa_data);
357 return 0;
358 }
359
360 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
361 {
362 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
363 const struct net_device_ops *ops = real_dev->netdev_ops;
364 struct ifreq ifrr;
365 int err = -EOPNOTSUPP;
366
367 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
368 ifrr.ifr_ifru = ifr->ifr_ifru;
369
370 switch (cmd) {
371 case SIOCGMIIPHY:
372 case SIOCGMIIREG:
373 case SIOCSMIIREG:
374 case SIOCSHWTSTAMP:
375 case SIOCGHWTSTAMP:
376 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
377 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
378 break;
379 }
380
381 if (!err)
382 ifr->ifr_ifru = ifrr.ifr_ifru;
383
384 return err;
385 }
386
387 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
388 {
389 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
390 const struct net_device_ops *ops = real_dev->netdev_ops;
391 int err = 0;
392
393 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
394 err = ops->ndo_neigh_setup(real_dev, pa);
395
396 return err;
397 }
398
399 #if IS_ENABLED(CONFIG_FCOE)
400 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
401 struct scatterlist *sgl, unsigned int sgc)
402 {
403 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
404 const struct net_device_ops *ops = real_dev->netdev_ops;
405 int rc = 0;
406
407 if (ops->ndo_fcoe_ddp_setup)
408 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
409
410 return rc;
411 }
412
413 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
414 {
415 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
416 const struct net_device_ops *ops = real_dev->netdev_ops;
417 int len = 0;
418
419 if (ops->ndo_fcoe_ddp_done)
420 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
421
422 return len;
423 }
424
425 static int vlan_dev_fcoe_enable(struct net_device *dev)
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 = -EINVAL;
430
431 if (ops->ndo_fcoe_enable)
432 rc = ops->ndo_fcoe_enable(real_dev);
433 return rc;
434 }
435
436 static int vlan_dev_fcoe_disable(struct net_device *dev)
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 rc = -EINVAL;
441
442 if (ops->ndo_fcoe_disable)
443 rc = ops->ndo_fcoe_disable(real_dev);
444 return rc;
445 }
446
447 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
448 {
449 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
450 const struct net_device_ops *ops = real_dev->netdev_ops;
451 int rc = -EINVAL;
452
453 if (ops->ndo_fcoe_get_wwn)
454 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
455 return rc;
456 }
457
458 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
459 struct scatterlist *sgl, unsigned int sgc)
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 = 0;
464
465 if (ops->ndo_fcoe_ddp_target)
466 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
467
468 return rc;
469 }
470 #endif
471
472 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
473 {
474 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
475
476 if (dev->flags & IFF_UP) {
477 if (change & IFF_ALLMULTI)
478 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
479 if (change & IFF_PROMISC)
480 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
481 }
482 }
483
484 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
485 {
486 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
487 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
488 }
489
490 /*
491 * vlan network devices have devices nesting below it, and are a special
492 * "super class" of normal network devices; split their locks off into a
493 * separate class since they always nest.
494 */
495 static struct lock_class_key vlan_netdev_xmit_lock_key;
496 static struct lock_class_key vlan_netdev_addr_lock_key;
497
498 static void vlan_dev_set_lockdep_one(struct net_device *dev,
499 struct netdev_queue *txq,
500 void *_subclass)
501 {
502 lockdep_set_class_and_subclass(&txq->_xmit_lock,
503 &vlan_netdev_xmit_lock_key,
504 *(int *)_subclass);
505 }
506
507 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
508 {
509 lockdep_set_class_and_subclass(&dev->addr_list_lock,
510 &vlan_netdev_addr_lock_key,
511 subclass);
512 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
513 }
514
515 static int vlan_dev_get_lock_subclass(struct net_device *dev)
516 {
517 return vlan_dev_priv(dev)->nest_level;
518 }
519
520 static const struct header_ops vlan_header_ops = {
521 .create = vlan_dev_hard_header,
522 .parse = eth_header_parse,
523 };
524
525 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
526 unsigned short type,
527 const void *daddr, const void *saddr,
528 unsigned int len)
529 {
530 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
531 struct net_device *real_dev = vlan->real_dev;
532
533 if (saddr == NULL)
534 saddr = dev->dev_addr;
535
536 return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
537 }
538
539 static const struct header_ops vlan_passthru_header_ops = {
540 .create = vlan_passthru_hard_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
554 netif_carrier_off(dev);
555
556 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
557 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
558 IFF_MASTER | IFF_SLAVE);
559 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
560 (1<<__LINK_STATE_DORMANT))) |
561 (1<<__LINK_STATE_PRESENT);
562
563 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
564 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
565 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
566 NETIF_F_ALL_FCOE;
567
568 dev->features |= dev->hw_features | NETIF_F_LLTX;
569 dev->gso_max_size = real_dev->gso_max_size;
570 dev->gso_max_segs = real_dev->gso_max_segs;
571 if (dev->features & NETIF_F_VLAN_FEATURES)
572 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
573
574 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
575
576 /* ipv6 shared card related stuff */
577 dev->dev_id = real_dev->dev_id;
578
579 if (is_zero_ether_addr(dev->dev_addr)) {
580 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
581 dev->addr_assign_type = NET_ADDR_STOLEN;
582 }
583 if (is_zero_ether_addr(dev->broadcast))
584 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
585
586 #if IS_ENABLED(CONFIG_FCOE)
587 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
588 #endif
589
590 dev->needed_headroom = real_dev->needed_headroom;
591 if (vlan_hw_offload_capable(real_dev->features,
592 vlan_dev_priv(dev)->vlan_proto)) {
593 dev->header_ops = &vlan_passthru_header_ops;
594 dev->hard_header_len = real_dev->hard_header_len;
595 } else {
596 dev->header_ops = &vlan_header_ops;
597 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
598 }
599
600 dev->netdev_ops = &vlan_netdev_ops;
601
602 SET_NETDEV_DEVTYPE(dev, &vlan_type);
603
604 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev));
605
606 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
607 if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
608 return -ENOMEM;
609
610 return 0;
611 }
612
613 static void vlan_dev_uninit(struct net_device *dev)
614 {
615 struct vlan_priority_tci_mapping *pm;
616 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
617 int i;
618
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 netdev_features_t lower_features;
633
634 lower_features = netdev_intersect_features((real_dev->vlan_features |
635 NETIF_F_RXCSUM),
636 real_dev->features);
637
638 /* Add HW_CSUM setting to preserve user ability to control
639 * checksum offload on the vlan device.
640 */
641 if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
642 lower_features |= NETIF_F_HW_CSUM;
643 features = netdev_intersect_features(features, lower_features);
644 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
645 features |= NETIF_F_LLTX;
646
647 return features;
648 }
649
650 static int vlan_ethtool_get_link_ksettings(struct net_device *dev,
651 struct ethtool_link_ksettings *cmd)
652 {
653 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
654
655 return __ethtool_get_link_ksettings(vlan->real_dev, cmd);
656 }
657
658 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
659 struct ethtool_drvinfo *info)
660 {
661 strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
662 strlcpy(info->version, vlan_version, sizeof(info->version));
663 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
664 }
665
666 static int vlan_ethtool_get_ts_info(struct net_device *dev,
667 struct ethtool_ts_info *info)
668 {
669 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
670 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
671 struct phy_device *phydev = vlan->real_dev->phydev;
672
673 if (phydev && phydev->drv && phydev->drv->ts_info) {
674 return phydev->drv->ts_info(phydev, info);
675 } else if (ops->get_ts_info) {
676 return ops->get_ts_info(vlan->real_dev, info);
677 } else {
678 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
679 SOF_TIMESTAMPING_SOFTWARE;
680 info->phc_index = -1;
681 }
682
683 return 0;
684 }
685
686 static void vlan_dev_get_stats64(struct net_device *dev,
687 struct rtnl_link_stats64 *stats)
688 {
689 struct vlan_pcpu_stats *p;
690 u32 rx_errors = 0, tx_dropped = 0;
691 int i;
692
693 for_each_possible_cpu(i) {
694 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
695 unsigned int start;
696
697 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
698 do {
699 start = u64_stats_fetch_begin_irq(&p->syncp);
700 rxpackets = p->rx_packets;
701 rxbytes = p->rx_bytes;
702 rxmulticast = p->rx_multicast;
703 txpackets = p->tx_packets;
704 txbytes = p->tx_bytes;
705 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
706
707 stats->rx_packets += rxpackets;
708 stats->rx_bytes += rxbytes;
709 stats->multicast += rxmulticast;
710 stats->tx_packets += txpackets;
711 stats->tx_bytes += txbytes;
712 /* rx_errors & tx_dropped are u32 */
713 rx_errors += p->rx_errors;
714 tx_dropped += p->tx_dropped;
715 }
716 stats->rx_errors = rx_errors;
717 stats->tx_dropped = tx_dropped;
718 }
719
720 #ifdef CONFIG_NET_POLL_CONTROLLER
721 static void vlan_dev_poll_controller(struct net_device *dev)
722 {
723 return;
724 }
725
726 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
727 {
728 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
729 struct net_device *real_dev = vlan->real_dev;
730 struct netpoll *netpoll;
731 int err = 0;
732
733 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
734 err = -ENOMEM;
735 if (!netpoll)
736 goto out;
737
738 err = __netpoll_setup(netpoll, real_dev);
739 if (err) {
740 kfree(netpoll);
741 goto out;
742 }
743
744 vlan->netpoll = netpoll;
745
746 out:
747 return err;
748 }
749
750 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
751 {
752 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
753 struct netpoll *netpoll = vlan->netpoll;
754
755 if (!netpoll)
756 return;
757
758 vlan->netpoll = NULL;
759
760 __netpoll_free_async(netpoll);
761 }
762 #endif /* CONFIG_NET_POLL_CONTROLLER */
763
764 static int vlan_dev_get_iflink(const struct net_device *dev)
765 {
766 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
767
768 return real_dev->ifindex;
769 }
770
771 static const struct ethtool_ops vlan_ethtool_ops = {
772 .get_link_ksettings = vlan_ethtool_get_link_ksettings,
773 .get_drvinfo = vlan_ethtool_get_drvinfo,
774 .get_link = ethtool_op_get_link,
775 .get_ts_info = vlan_ethtool_get_ts_info,
776 };
777
778 static const struct net_device_ops vlan_netdev_ops = {
779 .ndo_change_mtu = vlan_dev_change_mtu,
780 .ndo_init = vlan_dev_init,
781 .ndo_uninit = vlan_dev_uninit,
782 .ndo_open = vlan_dev_open,
783 .ndo_stop = vlan_dev_stop,
784 .ndo_start_xmit = vlan_dev_hard_start_xmit,
785 .ndo_validate_addr = eth_validate_addr,
786 .ndo_set_mac_address = vlan_dev_set_mac_address,
787 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
788 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
789 .ndo_do_ioctl = vlan_dev_ioctl,
790 .ndo_neigh_setup = vlan_dev_neigh_setup,
791 .ndo_get_stats64 = vlan_dev_get_stats64,
792 #if IS_ENABLED(CONFIG_FCOE)
793 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
794 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
795 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
796 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
797 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
798 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
799 #endif
800 #ifdef CONFIG_NET_POLL_CONTROLLER
801 .ndo_poll_controller = vlan_dev_poll_controller,
802 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
803 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
804 #endif
805 .ndo_fix_features = vlan_dev_fix_features,
806 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass,
807 .ndo_get_iflink = vlan_dev_get_iflink,
808 };
809
810 static void vlan_dev_free(struct net_device *dev)
811 {
812 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
813
814 free_percpu(vlan->vlan_pcpu_stats);
815 vlan->vlan_pcpu_stats = NULL;
816 }
817
818 void vlan_setup(struct net_device *dev)
819 {
820 ether_setup(dev);
821
822 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE;
823 dev->priv_flags |= IFF_UNICAST_FLT;
824 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
825 netif_keep_dst(dev);
826
827 dev->netdev_ops = &vlan_netdev_ops;
828 dev->needs_free_netdev = true;
829 dev->priv_destructor = vlan_dev_free;
830 dev->ethtool_ops = &vlan_ethtool_ops;
831
832 dev->min_mtu = 0;
833 dev->max_mtu = ETH_MAX_MTU;
834
835 eth_zero_addr(dev->broadcast);
836 }
Linux with added FPC-III support