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Merge tag 'uninit-macro-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-jammy-kernel.git] / net / 8021q / vlan_dev.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* -*- linux-c -*-
3 * INET 802.1Q VLAN
4 * Ethernet-type device handling.
5 *
6 * Authors: Ben Greear <greearb@candelatech.com>
7 * Please send support related email to: netdev@vger.kernel.org
8 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
9 *
10 * Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com>
11 * - reset skb->pkt_type on incoming packets when MAC was changed
12 * - see that changed MAC is saddr for outgoing packets
13 * Oct 20, 2001: Ard van Breeman:
14 * - Fix MC-list, finally.
15 * - Flush MC-list on VLAN destroy.
16 */
17
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19
20 #include <linux/module.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/netdevice.h>
24 #include <linux/net_tstamp.h>
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/phy.h>
28 #include <net/arp.h>
29
30 #include "vlan.h"
31 #include "vlanproc.h"
32 #include <linux/if_vlan.h>
33 #include <linux/netpoll.h>
34
35 /*
36 * Create the VLAN header for an arbitrary protocol layer
37 *
38 * saddr=NULL means use device source address
39 * daddr=NULL means leave destination address (eg unresolved arp)
40 *
41 * This is called when the SKB is moving down the stack towards the
42 * physical devices.
43 */
44 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
45 unsigned short type,
46 const void *daddr, const void *saddr,
47 unsigned int len)
48 {
49 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
50 struct vlan_hdr *vhdr;
51 unsigned int vhdrlen = 0;
52 u16 vlan_tci = 0;
53 int rc;
54
55 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
56 vhdr = skb_push(skb, VLAN_HLEN);
57
58 vlan_tci = vlan->vlan_id;
59 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
60 vhdr->h_vlan_TCI = htons(vlan_tci);
61
62 /*
63 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
64 * put the length in here instead.
65 */
66 if (type != ETH_P_802_3 && type != ETH_P_802_2)
67 vhdr->h_vlan_encapsulated_proto = htons(type);
68 else
69 vhdr->h_vlan_encapsulated_proto = htons(len);
70
71 skb->protocol = vlan->vlan_proto;
72 type = ntohs(vlan->vlan_proto);
73 vhdrlen = VLAN_HLEN;
74 }
75
76 /* Before delegating work to the lower layer, enter our MAC-address */
77 if (saddr == NULL)
78 saddr = dev->dev_addr;
79
80 /* Now make the underlying real hard header */
81 dev = vlan->real_dev;
82 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
83 if (rc > 0)
84 rc += vhdrlen;
85 return rc;
86 }
87
88 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
89 {
90 #ifdef CONFIG_NET_POLL_CONTROLLER
91 return netpoll_send_skb(vlan->netpoll, skb);
92 #else
93 BUG();
94 return NETDEV_TX_OK;
95 #endif
96 }
97
98 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
99 struct net_device *dev)
100 {
101 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
102 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
103 unsigned int len;
104 int ret;
105
106 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
107 *
108 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
109 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
110 */
111 if (veth->h_vlan_proto != vlan->vlan_proto ||
112 vlan->flags & VLAN_FLAG_REORDER_HDR) {
113 u16 vlan_tci;
114 vlan_tci = vlan->vlan_id;
115 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
116 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
117 }
118
119 skb->dev = vlan->real_dev;
120 len = skb->len;
121 if (unlikely(netpoll_tx_running(dev)))
122 return vlan_netpoll_send_skb(vlan, skb);
123
124 ret = dev_queue_xmit(skb);
125
126 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
127 struct vlan_pcpu_stats *stats;
128
129 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
130 u64_stats_update_begin(&stats->syncp);
131 stats->tx_packets++;
132 stats->tx_bytes += len;
133 u64_stats_update_end(&stats->syncp);
134 } else {
135 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
136 }
137
138 return ret;
139 }
140
141 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
142 {
143 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
144 unsigned int max_mtu = real_dev->mtu;
145
146 if (netif_reduces_vlan_mtu(real_dev))
147 max_mtu -= VLAN_HLEN;
148 if (max_mtu < new_mtu)
149 return -ERANGE;
150
151 dev->mtu = new_mtu;
152
153 return 0;
154 }
155
156 void vlan_dev_set_ingress_priority(const struct net_device *dev,
157 u32 skb_prio, u16 vlan_prio)
158 {
159 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
160
161 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
162 vlan->nr_ingress_mappings--;
163 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
164 vlan->nr_ingress_mappings++;
165
166 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
167 }
168
169 int vlan_dev_set_egress_priority(const struct net_device *dev,
170 u32 skb_prio, u16 vlan_prio)
171 {
172 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
173 struct vlan_priority_tci_mapping *mp = NULL;
174 struct vlan_priority_tci_mapping *np;
175 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
176
177 /* See if a priority mapping exists.. */
178 mp = vlan->egress_priority_map[skb_prio & 0xF];
179 while (mp) {
180 if (mp->priority == skb_prio) {
181 if (mp->vlan_qos && !vlan_qos)
182 vlan->nr_egress_mappings--;
183 else if (!mp->vlan_qos && vlan_qos)
184 vlan->nr_egress_mappings++;
185 mp->vlan_qos = vlan_qos;
186 return 0;
187 }
188 mp = mp->next;
189 }
190
191 /* Create a new mapping then. */
192 mp = vlan->egress_priority_map[skb_prio & 0xF];
193 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
194 if (!np)
195 return -ENOBUFS;
196
197 np->next = mp;
198 np->priority = skb_prio;
199 np->vlan_qos = vlan_qos;
200 /* Before inserting this element in hash table, make sure all its fields
201 * are committed to memory.
202 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
203 */
204 smp_wmb();
205 vlan->egress_priority_map[skb_prio & 0xF] = np;
206 if (vlan_qos)
207 vlan->nr_egress_mappings++;
208 return 0;
209 }
210
211 /* Flags are defined in the vlan_flags enum in
212 * include/uapi/linux/if_vlan.h file.
213 */
214 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
215 {
216 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
217 u32 old_flags = vlan->flags;
218
219 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
220 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP |
221 VLAN_FLAG_BRIDGE_BINDING))
222 return -EINVAL;
223
224 vlan->flags = (old_flags & ~mask) | (flags & mask);
225
226 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
227 if (vlan->flags & VLAN_FLAG_GVRP)
228 vlan_gvrp_request_join(dev);
229 else
230 vlan_gvrp_request_leave(dev);
231 }
232
233 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
234 if (vlan->flags & VLAN_FLAG_MVRP)
235 vlan_mvrp_request_join(dev);
236 else
237 vlan_mvrp_request_leave(dev);
238 }
239 return 0;
240 }
241
242 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
243 {
244 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
245 }
246
247 bool vlan_dev_inherit_address(struct net_device *dev,
248 struct net_device *real_dev)
249 {
250 if (dev->addr_assign_type != NET_ADDR_STOLEN)
251 return false;
252
253 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
254 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
255 return true;
256 }
257
258 static int vlan_dev_open(struct net_device *dev)
259 {
260 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
261 struct net_device *real_dev = vlan->real_dev;
262 int err;
263
264 if (!(real_dev->flags & IFF_UP) &&
265 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
266 return -ENETDOWN;
267
268 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) &&
269 !vlan_dev_inherit_address(dev, real_dev)) {
270 err = dev_uc_add(real_dev, dev->dev_addr);
271 if (err < 0)
272 goto out;
273 }
274
275 if (dev->flags & IFF_ALLMULTI) {
276 err = dev_set_allmulti(real_dev, 1);
277 if (err < 0)
278 goto del_unicast;
279 }
280 if (dev->flags & IFF_PROMISC) {
281 err = dev_set_promiscuity(real_dev, 1);
282 if (err < 0)
283 goto clear_allmulti;
284 }
285
286 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
287
288 if (vlan->flags & VLAN_FLAG_GVRP)
289 vlan_gvrp_request_join(dev);
290
291 if (vlan->flags & VLAN_FLAG_MVRP)
292 vlan_mvrp_request_join(dev);
293
294 if (netif_carrier_ok(real_dev) &&
295 !(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
296 netif_carrier_on(dev);
297 return 0;
298
299 clear_allmulti:
300 if (dev->flags & IFF_ALLMULTI)
301 dev_set_allmulti(real_dev, -1);
302 del_unicast:
303 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
304 dev_uc_del(real_dev, dev->dev_addr);
305 out:
306 netif_carrier_off(dev);
307 return err;
308 }
309
310 static int vlan_dev_stop(struct net_device *dev)
311 {
312 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
313 struct net_device *real_dev = vlan->real_dev;
314
315 dev_mc_unsync(real_dev, dev);
316 dev_uc_unsync(real_dev, dev);
317 if (dev->flags & IFF_ALLMULTI)
318 dev_set_allmulti(real_dev, -1);
319 if (dev->flags & IFF_PROMISC)
320 dev_set_promiscuity(real_dev, -1);
321
322 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
323 dev_uc_del(real_dev, dev->dev_addr);
324
325 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
326 netif_carrier_off(dev);
327 return 0;
328 }
329
330 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
331 {
332 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
333 struct sockaddr *addr = p;
334 int err;
335
336 if (!is_valid_ether_addr(addr->sa_data))
337 return -EADDRNOTAVAIL;
338
339 if (!(dev->flags & IFF_UP))
340 goto out;
341
342 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
343 err = dev_uc_add(real_dev, addr->sa_data);
344 if (err < 0)
345 return err;
346 }
347
348 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
349 dev_uc_del(real_dev, dev->dev_addr);
350
351 out:
352 ether_addr_copy(dev->dev_addr, addr->sa_data);
353 return 0;
354 }
355
356 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
357 {
358 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
359 const struct net_device_ops *ops = real_dev->netdev_ops;
360 struct ifreq ifrr;
361 int err = -EOPNOTSUPP;
362
363 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
364 ifrr.ifr_ifru = ifr->ifr_ifru;
365
366 switch (cmd) {
367 case SIOCSHWTSTAMP:
368 if (!net_eq(dev_net(dev), &init_net))
369 break;
370 /* fall through */
371 case SIOCGMIIPHY:
372 case SIOCGMIIREG:
373 case SIOCSMIIREG:
374 case SIOCGHWTSTAMP:
375 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
376 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
377 break;
378 }
379
380 if (!err)
381 ifr->ifr_ifru = ifrr.ifr_ifru;
382
383 return err;
384 }
385
386 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
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 int err = 0;
391
392 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
393 err = ops->ndo_neigh_setup(real_dev, pa);
394
395 return err;
396 }
397
398 #if IS_ENABLED(CONFIG_FCOE)
399 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
400 struct scatterlist *sgl, unsigned int sgc)
401 {
402 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
403 const struct net_device_ops *ops = real_dev->netdev_ops;
404 int rc = 0;
405
406 if (ops->ndo_fcoe_ddp_setup)
407 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
408
409 return rc;
410 }
411
412 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
413 {
414 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
415 const struct net_device_ops *ops = real_dev->netdev_ops;
416 int len = 0;
417
418 if (ops->ndo_fcoe_ddp_done)
419 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
420
421 return len;
422 }
423
424 static int vlan_dev_fcoe_enable(struct net_device *dev)
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 = -EINVAL;
429
430 if (ops->ndo_fcoe_enable)
431 rc = ops->ndo_fcoe_enable(real_dev);
432 return rc;
433 }
434
435 static int vlan_dev_fcoe_disable(struct net_device *dev)
436 {
437 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
438 const struct net_device_ops *ops = real_dev->netdev_ops;
439 int rc = -EINVAL;
440
441 if (ops->ndo_fcoe_disable)
442 rc = ops->ndo_fcoe_disable(real_dev);
443 return rc;
444 }
445
446 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
447 struct scatterlist *sgl, unsigned int sgc)
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 = 0;
452
453 if (ops->ndo_fcoe_ddp_target)
454 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
455
456 return rc;
457 }
458 #endif
459
460 #ifdef NETDEV_FCOE_WWNN
461 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
462 {
463 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
464 const struct net_device_ops *ops = real_dev->netdev_ops;
465 int rc = -EINVAL;
466
467 if (ops->ndo_fcoe_get_wwn)
468 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
469 return rc;
470 }
471 #endif
472
473 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
474 {
475 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
476
477 if (dev->flags & IFF_UP) {
478 if (change & IFF_ALLMULTI)
479 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
480 if (change & IFF_PROMISC)
481 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
482 }
483 }
484
485 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
486 {
487 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
488 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
489 }
490
491 /*
492 * vlan network devices have devices nesting below it, and are a special
493 * "super class" of normal network devices; split their locks off into a
494 * separate class since they always nest.
495 */
496 static struct lock_class_key vlan_netdev_xmit_lock_key;
497 static struct lock_class_key vlan_netdev_addr_lock_key;
498
499 static void vlan_dev_set_lockdep_one(struct net_device *dev,
500 struct netdev_queue *txq,
501 void *unused)
502 {
503 lockdep_set_class(&txq->_xmit_lock, &vlan_netdev_xmit_lock_key);
504 }
505
506 static void vlan_dev_set_lockdep_class(struct net_device *dev)
507 {
508 lockdep_set_class(&dev->addr_list_lock,
509 &vlan_netdev_addr_lock_key);
510 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, NULL);
511 }
512
513 static const struct header_ops vlan_header_ops = {
514 .create = vlan_dev_hard_header,
515 .parse = eth_header_parse,
516 };
517
518 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
519 unsigned short type,
520 const void *daddr, const void *saddr,
521 unsigned int len)
522 {
523 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
524 struct net_device *real_dev = vlan->real_dev;
525
526 if (saddr == NULL)
527 saddr = dev->dev_addr;
528
529 return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
530 }
531
532 static const struct header_ops vlan_passthru_header_ops = {
533 .create = vlan_passthru_hard_header,
534 .parse = eth_header_parse,
535 };
536
537 static struct device_type vlan_type = {
538 .name = "vlan",
539 };
540
541 static const struct net_device_ops vlan_netdev_ops;
542
543 static int vlan_dev_init(struct net_device *dev)
544 {
545 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
546 struct net_device *real_dev = vlan->real_dev;
547
548 netif_carrier_off(dev);
549
550 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
551 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
552 IFF_MASTER | IFF_SLAVE);
553 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
554 (1<<__LINK_STATE_DORMANT))) |
555 (1<<__LINK_STATE_PRESENT);
556
557 if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING)
558 dev->state |= (1 << __LINK_STATE_NOCARRIER);
559
560 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
561 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
562 NETIF_F_GSO_ENCAP_ALL |
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 dev->hw_enc_features = vlan_tnl_features(real_dev);
574 dev->mpls_features = real_dev->mpls_features;
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, vlan->vlan_proto)) {
592 dev->header_ops = &vlan_passthru_header_ops;
593 dev->hard_header_len = real_dev->hard_header_len;
594 } else {
595 dev->header_ops = &vlan_header_ops;
596 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
597 }
598
599 dev->netdev_ops = &vlan_netdev_ops;
600
601 SET_NETDEV_DEVTYPE(dev, &vlan_type);
602
603 vlan_dev_set_lockdep_class(dev);
604
605 vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
606 if (!vlan->vlan_pcpu_stats)
607 return -ENOMEM;
608
609 return 0;
610 }
611
612 /* Note: this function might be called multiple times for the same device. */
613 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 (phy_has_tsinfo(phydev)) {
674 return phy_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 __netpoll_free(netpoll);
760 }
761 #endif /* CONFIG_NET_POLL_CONTROLLER */
762
763 static int vlan_dev_get_iflink(const struct net_device *dev)
764 {
765 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
766
767 return real_dev->ifindex;
768 }
769
770 static const struct ethtool_ops vlan_ethtool_ops = {
771 .get_link_ksettings = vlan_ethtool_get_link_ksettings,
772 .get_drvinfo = vlan_ethtool_get_drvinfo,
773 .get_link = ethtool_op_get_link,
774 .get_ts_info = vlan_ethtool_get_ts_info,
775 };
776
777 static const struct net_device_ops vlan_netdev_ops = {
778 .ndo_change_mtu = vlan_dev_change_mtu,
779 .ndo_init = vlan_dev_init,
780 .ndo_uninit = vlan_dev_uninit,
781 .ndo_open = vlan_dev_open,
782 .ndo_stop = vlan_dev_stop,
783 .ndo_start_xmit = vlan_dev_hard_start_xmit,
784 .ndo_validate_addr = eth_validate_addr,
785 .ndo_set_mac_address = vlan_dev_set_mac_address,
786 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
787 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
788 .ndo_do_ioctl = vlan_dev_ioctl,
789 .ndo_neigh_setup = vlan_dev_neigh_setup,
790 .ndo_get_stats64 = vlan_dev_get_stats64,
791 #if IS_ENABLED(CONFIG_FCOE)
792 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
793 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
794 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
795 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
796 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
797 #endif
798 #ifdef NETDEV_FCOE_WWNN
799 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
800 #endif
801 #ifdef CONFIG_NET_POLL_CONTROLLER
802 .ndo_poll_controller = vlan_dev_poll_controller,
803 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
804 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
805 #endif
806 .ndo_fix_features = vlan_dev_fix_features,
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 }
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