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scsi: ufs: fix race between clock gating and devfreq scaling work
[linux/fpc-iii.git] / net / 8021q / vlan_dev.c
blobfb3e2a50d76e62d977aa80c002d3a13e567eaef3
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 = (struct vlan_hdr *) 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 include/linux/if_vlan.h file. */
219 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
220 {
221 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
222 u32 old_flags = vlan->flags;
223
224 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
225 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
226 return -EINVAL;
227
228 vlan->flags = (old_flags & ~mask) | (flags & mask);
229
230 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
231 if (vlan->flags & VLAN_FLAG_GVRP)
232 vlan_gvrp_request_join(dev);
233 else
234 vlan_gvrp_request_leave(dev);
235 }
236
237 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
238 if (vlan->flags & VLAN_FLAG_MVRP)
239 vlan_mvrp_request_join(dev);
240 else
241 vlan_mvrp_request_leave(dev);
242 }
243 return 0;
244 }
245
246 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
247 {
248 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
249 }
250
251 bool vlan_dev_inherit_address(struct net_device *dev,
252 struct net_device *real_dev)
253 {
254 if (dev->addr_assign_type != NET_ADDR_STOLEN)
255 return false;
256
257 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
258 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
259 return true;
260 }
261
262 static int vlan_dev_open(struct net_device *dev)
263 {
264 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
265 struct net_device *real_dev = vlan->real_dev;
266 int err;
267
268 if (!(real_dev->flags & IFF_UP) &&
269 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
270 return -ENETDOWN;
271
272 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) &&
273 !vlan_dev_inherit_address(dev, real_dev)) {
274 err = dev_uc_add(real_dev, dev->dev_addr);
275 if (err < 0)
276 goto out;
277 }
278
279 if (dev->flags & IFF_ALLMULTI) {
280 err = dev_set_allmulti(real_dev, 1);
281 if (err < 0)
282 goto del_unicast;
283 }
284 if (dev->flags & IFF_PROMISC) {
285 err = dev_set_promiscuity(real_dev, 1);
286 if (err < 0)
287 goto clear_allmulti;
288 }
289
290 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
291
292 if (vlan->flags & VLAN_FLAG_GVRP)
293 vlan_gvrp_request_join(dev);
294
295 if (vlan->flags & VLAN_FLAG_MVRP)
296 vlan_mvrp_request_join(dev);
297
298 if (netif_carrier_ok(real_dev))
299 netif_carrier_on(dev);
300 return 0;
301
302 clear_allmulti:
303 if (dev->flags & IFF_ALLMULTI)
304 dev_set_allmulti(real_dev, -1);
305 del_unicast:
306 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
307 dev_uc_del(real_dev, dev->dev_addr);
308 out:
309 netif_carrier_off(dev);
310 return err;
311 }
312
313 static int vlan_dev_stop(struct net_device *dev)
314 {
315 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
316 struct net_device *real_dev = vlan->real_dev;
317
318 dev_mc_unsync(real_dev, dev);
319 dev_uc_unsync(real_dev, dev);
320 if (dev->flags & IFF_ALLMULTI)
321 dev_set_allmulti(real_dev, -1);
322 if (dev->flags & IFF_PROMISC)
323 dev_set_promiscuity(real_dev, -1);
324
325 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
326 dev_uc_del(real_dev, dev->dev_addr);
327
328 netif_carrier_off(dev);
329 return 0;
330 }
331
332 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
333 {
334 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
335 struct sockaddr *addr = p;
336 int err;
337
338 if (!is_valid_ether_addr(addr->sa_data))
339 return -EADDRNOTAVAIL;
340
341 if (!(dev->flags & IFF_UP))
342 goto out;
343
344 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
345 err = dev_uc_add(real_dev, addr->sa_data);
346 if (err < 0)
347 return err;
348 }
349
350 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
351 dev_uc_del(real_dev, dev->dev_addr);
352
353 out:
354 ether_addr_copy(dev->dev_addr, addr->sa_data);
355 return 0;
356 }
357
358 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
359 {
360 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
361 const struct net_device_ops *ops = real_dev->netdev_ops;
362 struct ifreq ifrr;
363 int err = -EOPNOTSUPP;
364
365 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
366 ifrr.ifr_ifru = ifr->ifr_ifru;
367
368 switch (cmd) {
369 case SIOCGMIIPHY:
370 case SIOCGMIIREG:
371 case SIOCSMIIREG:
372 case SIOCSHWTSTAMP:
373 case SIOCGHWTSTAMP:
374 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
375 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
376 break;
377 }
378
379 if (!err)
380 ifr->ifr_ifru = ifrr.ifr_ifru;
381
382 return err;
383 }
384
385 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
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 int err = 0;
390
391 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
392 err = ops->ndo_neigh_setup(real_dev, pa);
393
394 return err;
395 }
396
397 #if IS_ENABLED(CONFIG_FCOE)
398 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
399 struct scatterlist *sgl, unsigned int sgc)
400 {
401 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
402 const struct net_device_ops *ops = real_dev->netdev_ops;
403 int rc = 0;
404
405 if (ops->ndo_fcoe_ddp_setup)
406 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
407
408 return rc;
409 }
410
411 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
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 len = 0;
416
417 if (ops->ndo_fcoe_ddp_done)
418 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
419
420 return len;
421 }
422
423 static int vlan_dev_fcoe_enable(struct net_device *dev)
424 {
425 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
426 const struct net_device_ops *ops = real_dev->netdev_ops;
427 int rc = -EINVAL;
428
429 if (ops->ndo_fcoe_enable)
430 rc = ops->ndo_fcoe_enable(real_dev);
431 return rc;
432 }
433
434 static int vlan_dev_fcoe_disable(struct net_device *dev)
435 {
436 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
437 const struct net_device_ops *ops = real_dev->netdev_ops;
438 int rc = -EINVAL;
439
440 if (ops->ndo_fcoe_disable)
441 rc = ops->ndo_fcoe_disable(real_dev);
442 return rc;
443 }
444
445 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
446 {
447 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
448 const struct net_device_ops *ops = real_dev->netdev_ops;
449 int rc = -EINVAL;
450
451 if (ops->ndo_fcoe_get_wwn)
452 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
453 return rc;
454 }
455
456 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
457 struct scatterlist *sgl, unsigned int sgc)
458 {
459 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
460 const struct net_device_ops *ops = real_dev->netdev_ops;
461 int rc = 0;
462
463 if (ops->ndo_fcoe_ddp_target)
464 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
465
466 return rc;
467 }
468 #endif
469
470 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
471 {
472 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
473
474 if (dev->flags & IFF_UP) {
475 if (change & IFF_ALLMULTI)
476 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
477 if (change & IFF_PROMISC)
478 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
479 }
480 }
481
482 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
483 {
484 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
485 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
486 }
487
488 /*
489 * vlan network devices have devices nesting below it, and are a special
490 * "super class" of normal network devices; split their locks off into a
491 * separate class since they always nest.
492 */
493 static struct lock_class_key vlan_netdev_xmit_lock_key;
494 static struct lock_class_key vlan_netdev_addr_lock_key;
495
496 static void vlan_dev_set_lockdep_one(struct net_device *dev,
497 struct netdev_queue *txq,
498 void *_subclass)
499 {
500 lockdep_set_class_and_subclass(&txq->_xmit_lock,
501 &vlan_netdev_xmit_lock_key,
502 *(int *)_subclass);
503 }
504
505 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
506 {
507 lockdep_set_class_and_subclass(&dev->addr_list_lock,
508 &vlan_netdev_addr_lock_key,
509 subclass);
510 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
511 }
512
513 static int vlan_dev_get_lock_subclass(struct net_device *dev)
514 {
515 return vlan_dev_priv(dev)->nest_level;
516 }
517
518 static const struct header_ops vlan_header_ops = {
519 .create = vlan_dev_hard_header,
520 .parse = eth_header_parse,
521 };
522
523 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
524 unsigned short type,
525 const void *daddr, const void *saddr,
526 unsigned int len)
527 {
528 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
529 struct net_device *real_dev = vlan->real_dev;
530
531 if (saddr == NULL)
532 saddr = dev->dev_addr;
533
534 return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
535 }
536
537 static const struct header_ops vlan_passthru_header_ops = {
538 .create = vlan_passthru_hard_header,
539 .parse = eth_header_parse,
540 };
541
542 static struct device_type vlan_type = {
543 .name = "vlan",
544 };
545
546 static const struct net_device_ops vlan_netdev_ops;
547
548 static int vlan_dev_init(struct net_device *dev)
549 {
550 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
551
552 netif_carrier_off(dev);
553
554 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
555 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
556 IFF_MASTER | IFF_SLAVE);
557 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
558 (1<<__LINK_STATE_DORMANT))) |
559 (1<<__LINK_STATE_PRESENT);
560
561 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
562 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
563 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
564 NETIF_F_ALL_FCOE;
565
566 dev->features |= dev->hw_features | NETIF_F_LLTX;
567 dev->gso_max_size = real_dev->gso_max_size;
568 dev->gso_max_segs = real_dev->gso_max_segs;
569 if (dev->features & NETIF_F_VLAN_FEATURES)
570 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
571
572 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
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 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
579 dev->addr_assign_type = NET_ADDR_STOLEN;
580 }
581 if (is_zero_ether_addr(dev->broadcast))
582 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
583
584 #if IS_ENABLED(CONFIG_FCOE)
585 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
586 #endif
587
588 dev->needed_headroom = real_dev->needed_headroom;
589 if (vlan_hw_offload_capable(real_dev->features,
590 vlan_dev_priv(dev)->vlan_proto)) {
591 dev->header_ops = &vlan_passthru_header_ops;
592 dev->hard_header_len = real_dev->hard_header_len;
593 } else {
594 dev->header_ops = &vlan_header_ops;
595 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
596 }
597
598 dev->netdev_ops = &vlan_netdev_ops;
599
600 SET_NETDEV_DEVTYPE(dev, &vlan_type);
601
602 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev));
603
604 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(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 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
618 while ((pm = vlan->egress_priority_map[i]) != NULL) {
619 vlan->egress_priority_map[i] = pm->next;
620 kfree(pm);
621 }
622 }
623 }
624
625 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
626 netdev_features_t features)
627 {
628 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
629 netdev_features_t old_features = features;
630
631 features = netdev_intersect_features(features, real_dev->vlan_features);
632 features |= NETIF_F_RXCSUM;
633 features = netdev_intersect_features(features, real_dev->features);
634
635 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
636 features |= NETIF_F_LLTX;
637
638 return features;
639 }
640
641 static int vlan_ethtool_get_link_ksettings(struct net_device *dev,
642 struct ethtool_link_ksettings *cmd)
643 {
644 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
645
646 return __ethtool_get_link_ksettings(vlan->real_dev, cmd);
647 }
648
649 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
650 struct ethtool_drvinfo *info)
651 {
652 strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
653 strlcpy(info->version, vlan_version, sizeof(info->version));
654 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
655 }
656
657 static int vlan_ethtool_get_ts_info(struct net_device *dev,
658 struct ethtool_ts_info *info)
659 {
660 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
661 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
662 struct phy_device *phydev = vlan->real_dev->phydev;
663
664 if (phydev && phydev->drv && phydev->drv->ts_info) {
665 return phydev->drv->ts_info(phydev, info);
666 } else if (ops->get_ts_info) {
667 return ops->get_ts_info(vlan->real_dev, info);
668 } else {
669 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
670 SOF_TIMESTAMPING_SOFTWARE;
671 info->phc_index = -1;
672 }
673
674 return 0;
675 }
676
677 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
678 {
679 struct vlan_pcpu_stats *p;
680 u32 rx_errors = 0, tx_dropped = 0;
681 int i;
682
683 for_each_possible_cpu(i) {
684 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
685 unsigned int start;
686
687 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
688 do {
689 start = u64_stats_fetch_begin_irq(&p->syncp);
690 rxpackets = p->rx_packets;
691 rxbytes = p->rx_bytes;
692 rxmulticast = p->rx_multicast;
693 txpackets = p->tx_packets;
694 txbytes = p->tx_bytes;
695 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
696
697 stats->rx_packets += rxpackets;
698 stats->rx_bytes += rxbytes;
699 stats->multicast += rxmulticast;
700 stats->tx_packets += txpackets;
701 stats->tx_bytes += txbytes;
702 /* rx_errors & tx_dropped are u32 */
703 rx_errors += p->rx_errors;
704 tx_dropped += p->tx_dropped;
705 }
706 stats->rx_errors = rx_errors;
707 stats->tx_dropped = tx_dropped;
708
709 return stats;
710 }
711
712 #ifdef CONFIG_NET_POLL_CONTROLLER
713 static void vlan_dev_poll_controller(struct net_device *dev)
714 {
715 return;
716 }
717
718 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
719 {
720 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
721 struct net_device *real_dev = vlan->real_dev;
722 struct netpoll *netpoll;
723 int err = 0;
724
725 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
726 err = -ENOMEM;
727 if (!netpoll)
728 goto out;
729
730 err = __netpoll_setup(netpoll, real_dev);
731 if (err) {
732 kfree(netpoll);
733 goto out;
734 }
735
736 vlan->netpoll = netpoll;
737
738 out:
739 return err;
740 }
741
742 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
743 {
744 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
745 struct netpoll *netpoll = vlan->netpoll;
746
747 if (!netpoll)
748 return;
749
750 vlan->netpoll = NULL;
751
752 __netpoll_free_async(netpoll);
753 }
754 #endif /* CONFIG_NET_POLL_CONTROLLER */
755
756 static int vlan_dev_get_iflink(const struct net_device *dev)
757 {
758 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
759
760 return real_dev->ifindex;
761 }
762
763 static const struct ethtool_ops vlan_ethtool_ops = {
764 .get_link_ksettings = vlan_ethtool_get_link_ksettings,
765 .get_drvinfo = vlan_ethtool_get_drvinfo,
766 .get_link = ethtool_op_get_link,
767 .get_ts_info = vlan_ethtool_get_ts_info,
768 };
769
770 static const struct net_device_ops vlan_netdev_ops = {
771 .ndo_change_mtu = vlan_dev_change_mtu,
772 .ndo_init = vlan_dev_init,
773 .ndo_uninit = vlan_dev_uninit,
774 .ndo_open = vlan_dev_open,
775 .ndo_stop = vlan_dev_stop,
776 .ndo_start_xmit = vlan_dev_hard_start_xmit,
777 .ndo_validate_addr = eth_validate_addr,
778 .ndo_set_mac_address = vlan_dev_set_mac_address,
779 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
780 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
781 .ndo_do_ioctl = vlan_dev_ioctl,
782 .ndo_neigh_setup = vlan_dev_neigh_setup,
783 .ndo_get_stats64 = vlan_dev_get_stats64,
784 #if IS_ENABLED(CONFIG_FCOE)
785 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
786 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
787 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
788 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
789 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
790 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
791 #endif
792 #ifdef CONFIG_NET_POLL_CONTROLLER
793 .ndo_poll_controller = vlan_dev_poll_controller,
794 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
795 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
796 #endif
797 .ndo_fix_features = vlan_dev_fix_features,
798 .ndo_neigh_construct = netdev_default_l2upper_neigh_construct,
799 .ndo_neigh_destroy = netdev_default_l2upper_neigh_destroy,
800 .ndo_fdb_add = switchdev_port_fdb_add,
801 .ndo_fdb_del = switchdev_port_fdb_del,
802 .ndo_fdb_dump = switchdev_port_fdb_dump,
803 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
804 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
805 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
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 free_netdev(dev);
817 }
818
819 void vlan_setup(struct net_device *dev)
820 {
821 ether_setup(dev);
822
823 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE;
824 dev->priv_flags |= IFF_UNICAST_FLT;
825 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
826 netif_keep_dst(dev);
827
828 dev->netdev_ops = &vlan_netdev_ops;
829 dev->destructor = vlan_dev_free;
830 dev->ethtool_ops = &vlan_ethtool_ops;
831
832 eth_zero_addr(dev->broadcast);
833 }
Linux with added FPC-III support