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ARM: dma-api: fix max_pfn off-by-one error in __dma_supported()
[linux/fpc-iii.git] / net / 8021q / vlan_dev.c
blob990b9fde28c654ea513bed3c2e42d470ad515712
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 if (vlan->netpoll)
92 netpoll_send_skb(vlan->netpoll, skb);
93 #else
94 BUG();
95 #endif
96 return NETDEV_TX_OK;
97 }
98
99 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
100 struct net_device *dev)
101 {
102 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
103 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
104 unsigned int len;
105 int ret;
106
107 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
108 *
109 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
110 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
111 */
112 if (veth->h_vlan_proto != vlan->vlan_proto ||
113 vlan->flags & VLAN_FLAG_REORDER_HDR) {
114 u16 vlan_tci;
115 vlan_tci = vlan->vlan_id;
116 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
117 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
118 }
119
120 skb->dev = vlan->real_dev;
121 len = skb->len;
122 if (unlikely(netpoll_tx_running(dev)))
123 return vlan_netpoll_send_skb(vlan, skb);
124
125 ret = dev_queue_xmit(skb);
126
127 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
128 struct vlan_pcpu_stats *stats;
129
130 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
131 u64_stats_update_begin(&stats->syncp);
132 stats->tx_packets++;
133 stats->tx_bytes += len;
134 u64_stats_update_end(&stats->syncp);
135 } else {
136 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
137 }
138
139 return ret;
140 }
141
142 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
143 {
144 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
145 unsigned int max_mtu = real_dev->mtu;
146
147 if (netif_reduces_vlan_mtu(real_dev))
148 max_mtu -= VLAN_HLEN;
149 if (max_mtu < new_mtu)
150 return -ERANGE;
151
152 dev->mtu = new_mtu;
153
154 return 0;
155 }
156
157 void vlan_dev_set_ingress_priority(const struct net_device *dev,
158 u32 skb_prio, u16 vlan_prio)
159 {
160 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
161
162 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
163 vlan->nr_ingress_mappings--;
164 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
165 vlan->nr_ingress_mappings++;
166
167 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
168 }
169
170 int vlan_dev_set_egress_priority(const struct net_device *dev,
171 u32 skb_prio, u16 vlan_prio)
172 {
173 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
174 struct vlan_priority_tci_mapping *mp = NULL;
175 struct vlan_priority_tci_mapping *np;
176 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
177
178 /* See if a priority mapping exists.. */
179 mp = vlan->egress_priority_map[skb_prio & 0xF];
180 while (mp) {
181 if (mp->priority == skb_prio) {
182 if (mp->vlan_qos && !vlan_qos)
183 vlan->nr_egress_mappings--;
184 else if (!mp->vlan_qos && vlan_qos)
185 vlan->nr_egress_mappings++;
186 mp->vlan_qos = vlan_qos;
187 return 0;
188 }
189 mp = mp->next;
190 }
191
192 /* Create a new mapping then. */
193 mp = vlan->egress_priority_map[skb_prio & 0xF];
194 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
195 if (!np)
196 return -ENOBUFS;
197
198 np->next = mp;
199 np->priority = skb_prio;
200 np->vlan_qos = vlan_qos;
201 /* Before inserting this element in hash table, make sure all its fields
202 * are committed to memory.
203 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
204 */
205 smp_wmb();
206 vlan->egress_priority_map[skb_prio & 0xF] = np;
207 if (vlan_qos)
208 vlan->nr_egress_mappings++;
209 return 0;
210 }
211
212 /* Flags are defined in the vlan_flags enum in
213 * include/uapi/linux/if_vlan.h file.
214 */
215 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
216 {
217 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
218 u32 old_flags = vlan->flags;
219
220 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
221 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP |
222 VLAN_FLAG_BRIDGE_BINDING))
223 return -EINVAL;
224
225 vlan->flags = (old_flags & ~mask) | (flags & mask);
226
227 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
228 if (vlan->flags & VLAN_FLAG_GVRP)
229 vlan_gvrp_request_join(dev);
230 else
231 vlan_gvrp_request_leave(dev);
232 }
233
234 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
235 if (vlan->flags & VLAN_FLAG_MVRP)
236 vlan_mvrp_request_join(dev);
237 else
238 vlan_mvrp_request_leave(dev);
239 }
240 return 0;
241 }
242
243 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
244 {
245 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
246 }
247
248 bool vlan_dev_inherit_address(struct net_device *dev,
249 struct net_device *real_dev)
250 {
251 if (dev->addr_assign_type != NET_ADDR_STOLEN)
252 return false;
253
254 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
255 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
256 return true;
257 }
258
259 static int vlan_dev_open(struct net_device *dev)
260 {
261 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
262 struct net_device *real_dev = vlan->real_dev;
263 int err;
264
265 if (!(real_dev->flags & IFF_UP) &&
266 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
267 return -ENETDOWN;
268
269 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) &&
270 !vlan_dev_inherit_address(dev, real_dev)) {
271 err = dev_uc_add(real_dev, dev->dev_addr);
272 if (err < 0)
273 goto out;
274 }
275
276 if (dev->flags & IFF_ALLMULTI) {
277 err = dev_set_allmulti(real_dev, 1);
278 if (err < 0)
279 goto del_unicast;
280 }
281 if (dev->flags & IFF_PROMISC) {
282 err = dev_set_promiscuity(real_dev, 1);
283 if (err < 0)
284 goto clear_allmulti;
285 }
286
287 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
288
289 if (vlan->flags & VLAN_FLAG_GVRP)
290 vlan_gvrp_request_join(dev);
291
292 if (vlan->flags & VLAN_FLAG_MVRP)
293 vlan_mvrp_request_join(dev);
294
295 if (netif_carrier_ok(real_dev) &&
296 !(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
297 netif_carrier_on(dev);
298 return 0;
299
300 clear_allmulti:
301 if (dev->flags & IFF_ALLMULTI)
302 dev_set_allmulti(real_dev, -1);
303 del_unicast:
304 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
305 dev_uc_del(real_dev, dev->dev_addr);
306 out:
307 netif_carrier_off(dev);
308 return err;
309 }
310
311 static int vlan_dev_stop(struct net_device *dev)
312 {
313 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
314 struct net_device *real_dev = vlan->real_dev;
315
316 dev_mc_unsync(real_dev, dev);
317 dev_uc_unsync(real_dev, dev);
318 if (dev->flags & IFF_ALLMULTI)
319 dev_set_allmulti(real_dev, -1);
320 if (dev->flags & IFF_PROMISC)
321 dev_set_promiscuity(real_dev, -1);
322
323 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
324 dev_uc_del(real_dev, dev->dev_addr);
325
326 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
327 netif_carrier_off(dev);
328 return 0;
329 }
330
331 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
332 {
333 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
334 struct sockaddr *addr = p;
335 int err;
336
337 if (!is_valid_ether_addr(addr->sa_data))
338 return -EADDRNOTAVAIL;
339
340 if (!(dev->flags & IFF_UP))
341 goto out;
342
343 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
344 err = dev_uc_add(real_dev, addr->sa_data);
345 if (err < 0)
346 return err;
347 }
348
349 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
350 dev_uc_del(real_dev, dev->dev_addr);
351
352 out:
353 ether_addr_copy(dev->dev_addr, addr->sa_data);
354 return 0;
355 }
356
357 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
358 {
359 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
360 const struct net_device_ops *ops = real_dev->netdev_ops;
361 struct ifreq ifrr;
362 int err = -EOPNOTSUPP;
363
364 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
365 ifrr.ifr_ifru = ifr->ifr_ifru;
366
367 switch (cmd) {
368 case SIOCSHWTSTAMP:
369 if (!net_eq(dev_net(dev), &init_net))
370 break;
371 /* fall through */
372 case SIOCGMIIPHY:
373 case SIOCGMIIREG:
374 case SIOCSMIIREG:
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_ddp_target(struct net_device *dev, u16 xid,
448 struct scatterlist *sgl, unsigned int sgc)
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 = 0;
453
454 if (ops->ndo_fcoe_ddp_target)
455 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
456
457 return rc;
458 }
459 #endif
460
461 #ifdef NETDEV_FCOE_WWNN
462 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
463 {
464 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
465 const struct net_device_ops *ops = real_dev->netdev_ops;
466 int rc = -EINVAL;
467
468 if (ops->ndo_fcoe_get_wwn)
469 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
470 return rc;
471 }
472 #endif
473
474 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
475 {
476 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
477
478 if (dev->flags & IFF_UP) {
479 if (change & IFF_ALLMULTI)
480 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
481 if (change & IFF_PROMISC)
482 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
483 }
484 }
485
486 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
487 {
488 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
489 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
490 }
491
492 static const struct header_ops vlan_header_ops = {
493 .create = vlan_dev_hard_header,
494 .parse = eth_header_parse,
495 };
496
497 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
498 unsigned short type,
499 const void *daddr, const void *saddr,
500 unsigned int len)
501 {
502 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
503 struct net_device *real_dev = vlan->real_dev;
504
505 if (saddr == NULL)
506 saddr = dev->dev_addr;
507
508 return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
509 }
510
511 static const struct header_ops vlan_passthru_header_ops = {
512 .create = vlan_passthru_hard_header,
513 .parse = eth_header_parse,
514 };
515
516 static struct device_type vlan_type = {
517 .name = "vlan",
518 };
519
520 static const struct net_device_ops vlan_netdev_ops;
521
522 static int vlan_dev_init(struct net_device *dev)
523 {
524 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
525 struct net_device *real_dev = vlan->real_dev;
526
527 netif_carrier_off(dev);
528
529 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
530 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
531 IFF_MASTER | IFF_SLAVE);
532 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
533 (1<<__LINK_STATE_DORMANT))) |
534 (1<<__LINK_STATE_PRESENT);
535
536 if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING)
537 dev->state |= (1 << __LINK_STATE_NOCARRIER);
538
539 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
540 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
541 NETIF_F_GSO_ENCAP_ALL |
542 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
543 NETIF_F_ALL_FCOE;
544
545 dev->features |= dev->hw_features | NETIF_F_LLTX;
546 dev->gso_max_size = real_dev->gso_max_size;
547 dev->gso_max_segs = real_dev->gso_max_segs;
548 if (dev->features & NETIF_F_VLAN_FEATURES)
549 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
550
551 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
552 dev->hw_enc_features = vlan_tnl_features(real_dev);
553 dev->mpls_features = real_dev->mpls_features;
554
555 /* ipv6 shared card related stuff */
556 dev->dev_id = real_dev->dev_id;
557
558 if (is_zero_ether_addr(dev->dev_addr)) {
559 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
560 dev->addr_assign_type = NET_ADDR_STOLEN;
561 }
562 if (is_zero_ether_addr(dev->broadcast))
563 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
564
565 #if IS_ENABLED(CONFIG_FCOE)
566 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
567 #endif
568
569 dev->needed_headroom = real_dev->needed_headroom;
570 if (vlan_hw_offload_capable(real_dev->features, vlan->vlan_proto)) {
571 dev->header_ops = &vlan_passthru_header_ops;
572 dev->hard_header_len = real_dev->hard_header_len;
573 } else {
574 dev->header_ops = &vlan_header_ops;
575 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
576 }
577
578 dev->netdev_ops = &vlan_netdev_ops;
579
580 SET_NETDEV_DEVTYPE(dev, &vlan_type);
581
582 vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
583 if (!vlan->vlan_pcpu_stats)
584 return -ENOMEM;
585
586 return 0;
587 }
588
589 /* Note: this function might be called multiple times for the same device. */
590 void vlan_dev_uninit(struct net_device *dev)
591 {
592 struct vlan_priority_tci_mapping *pm;
593 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
594 int i;
595
596 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
597 while ((pm = vlan->egress_priority_map[i]) != NULL) {
598 vlan->egress_priority_map[i] = pm->next;
599 kfree(pm);
600 }
601 }
602 }
603
604 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
605 netdev_features_t features)
606 {
607 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
608 netdev_features_t old_features = features;
609 netdev_features_t lower_features;
610
611 lower_features = netdev_intersect_features((real_dev->vlan_features |
612 NETIF_F_RXCSUM),
613 real_dev->features);
614
615 /* Add HW_CSUM setting to preserve user ability to control
616 * checksum offload on the vlan device.
617 */
618 if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
619 lower_features |= NETIF_F_HW_CSUM;
620 features = netdev_intersect_features(features, lower_features);
621 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
622 features |= NETIF_F_LLTX;
623
624 return features;
625 }
626
627 static int vlan_ethtool_get_link_ksettings(struct net_device *dev,
628 struct ethtool_link_ksettings *cmd)
629 {
630 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
631
632 return __ethtool_get_link_ksettings(vlan->real_dev, cmd);
633 }
634
635 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
636 struct ethtool_drvinfo *info)
637 {
638 strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
639 strlcpy(info->version, vlan_version, sizeof(info->version));
640 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
641 }
642
643 static int vlan_ethtool_get_ts_info(struct net_device *dev,
644 struct ethtool_ts_info *info)
645 {
646 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
647 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
648 struct phy_device *phydev = vlan->real_dev->phydev;
649
650 if (phy_has_tsinfo(phydev)) {
651 return phy_ts_info(phydev, info);
652 } else if (ops->get_ts_info) {
653 return ops->get_ts_info(vlan->real_dev, info);
654 } else {
655 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
656 SOF_TIMESTAMPING_SOFTWARE;
657 info->phc_index = -1;
658 }
659
660 return 0;
661 }
662
663 static void vlan_dev_get_stats64(struct net_device *dev,
664 struct rtnl_link_stats64 *stats)
665 {
666 struct vlan_pcpu_stats *p;
667 u32 rx_errors = 0, tx_dropped = 0;
668 int i;
669
670 for_each_possible_cpu(i) {
671 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
672 unsigned int start;
673
674 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
675 do {
676 start = u64_stats_fetch_begin_irq(&p->syncp);
677 rxpackets = p->rx_packets;
678 rxbytes = p->rx_bytes;
679 rxmulticast = p->rx_multicast;
680 txpackets = p->tx_packets;
681 txbytes = p->tx_bytes;
682 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
683
684 stats->rx_packets += rxpackets;
685 stats->rx_bytes += rxbytes;
686 stats->multicast += rxmulticast;
687 stats->tx_packets += txpackets;
688 stats->tx_bytes += txbytes;
689 /* rx_errors & tx_dropped are u32 */
690 rx_errors += p->rx_errors;
691 tx_dropped += p->tx_dropped;
692 }
693 stats->rx_errors = rx_errors;
694 stats->tx_dropped = tx_dropped;
695 }
696
697 #ifdef CONFIG_NET_POLL_CONTROLLER
698 static void vlan_dev_poll_controller(struct net_device *dev)
699 {
700 return;
701 }
702
703 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
704 {
705 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
706 struct net_device *real_dev = vlan->real_dev;
707 struct netpoll *netpoll;
708 int err = 0;
709
710 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
711 err = -ENOMEM;
712 if (!netpoll)
713 goto out;
714
715 err = __netpoll_setup(netpoll, real_dev);
716 if (err) {
717 kfree(netpoll);
718 goto out;
719 }
720
721 vlan->netpoll = netpoll;
722
723 out:
724 return err;
725 }
726
727 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
728 {
729 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
730 struct netpoll *netpoll = vlan->netpoll;
731
732 if (!netpoll)
733 return;
734
735 vlan->netpoll = NULL;
736 __netpoll_free(netpoll);
737 }
738 #endif /* CONFIG_NET_POLL_CONTROLLER */
739
740 static int vlan_dev_get_iflink(const struct net_device *dev)
741 {
742 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
743
744 return real_dev->ifindex;
745 }
746
747 static const struct ethtool_ops vlan_ethtool_ops = {
748 .get_link_ksettings = vlan_ethtool_get_link_ksettings,
749 .get_drvinfo = vlan_ethtool_get_drvinfo,
750 .get_link = ethtool_op_get_link,
751 .get_ts_info = vlan_ethtool_get_ts_info,
752 };
753
754 static const struct net_device_ops vlan_netdev_ops = {
755 .ndo_change_mtu = vlan_dev_change_mtu,
756 .ndo_init = vlan_dev_init,
757 .ndo_uninit = vlan_dev_uninit,
758 .ndo_open = vlan_dev_open,
759 .ndo_stop = vlan_dev_stop,
760 .ndo_start_xmit = vlan_dev_hard_start_xmit,
761 .ndo_validate_addr = eth_validate_addr,
762 .ndo_set_mac_address = vlan_dev_set_mac_address,
763 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
764 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
765 .ndo_do_ioctl = vlan_dev_ioctl,
766 .ndo_neigh_setup = vlan_dev_neigh_setup,
767 .ndo_get_stats64 = vlan_dev_get_stats64,
768 #if IS_ENABLED(CONFIG_FCOE)
769 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
770 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
771 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
772 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
773 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
774 #endif
775 #ifdef NETDEV_FCOE_WWNN
776 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
777 #endif
778 #ifdef CONFIG_NET_POLL_CONTROLLER
779 .ndo_poll_controller = vlan_dev_poll_controller,
780 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
781 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
782 #endif
783 .ndo_fix_features = vlan_dev_fix_features,
784 .ndo_get_iflink = vlan_dev_get_iflink,
785 };
786
787 static void vlan_dev_free(struct net_device *dev)
788 {
789 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
790
791 free_percpu(vlan->vlan_pcpu_stats);
792 vlan->vlan_pcpu_stats = NULL;
793 }
794
795 void vlan_setup(struct net_device *dev)
796 {
797 ether_setup(dev);
798
799 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE;
800 dev->priv_flags |= IFF_UNICAST_FLT;
801 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
802 netif_keep_dst(dev);
803
804 dev->netdev_ops = &vlan_netdev_ops;
805 dev->needs_free_netdev = true;
806 dev->priv_destructor = vlan_dev_free;
807 dev->ethtool_ops = &vlan_ethtool_ops;
808
809 dev->min_mtu = 0;
810 dev->max_mtu = ETH_MAX_MTU;
811
812 eth_zero_addr(dev->broadcast);
813 }
Linux with added FPC-III support