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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / net / 8021q / vlan_dev.c
blobf7e83f6d2e64ade531f53f366a069c2afcabfdef
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 <net/arp.h>
33 #include <net/switchdev.h>
34
35 #include "vlan.h"
36 #include "vlanproc.h"
37 #include <linux/if_vlan.h>
38 #include <linux/netpoll.h>
39
40 /*
41 * Create the VLAN header for an arbitrary protocol layer
42 *
43 * saddr=NULL means use device source address
44 * daddr=NULL means leave destination address (eg unresolved arp)
45 *
46 * This is called when the SKB is moving down the stack towards the
47 * physical devices.
48 */
49 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
50 unsigned short type,
51 const void *daddr, const void *saddr,
52 unsigned int len)
53 {
54 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
55 struct vlan_hdr *vhdr;
56 unsigned int vhdrlen = 0;
57 u16 vlan_tci = 0;
58 int rc;
59
60 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
61 vhdr = skb_push(skb, VLAN_HLEN);
62
63 vlan_tci = vlan->vlan_id;
64 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
65 vhdr->h_vlan_TCI = htons(vlan_tci);
66
67 /*
68 * Set the protocol type. For a packet of type ETH_P_802_3/2 we
69 * put the length in here instead.
70 */
71 if (type != ETH_P_802_3 && type != ETH_P_802_2)
72 vhdr->h_vlan_encapsulated_proto = htons(type);
73 else
74 vhdr->h_vlan_encapsulated_proto = htons(len);
75
76 skb->protocol = vlan->vlan_proto;
77 type = ntohs(vlan->vlan_proto);
78 vhdrlen = VLAN_HLEN;
79 }
80
81 /* Before delegating work to the lower layer, enter our MAC-address */
82 if (saddr == NULL)
83 saddr = dev->dev_addr;
84
85 /* Now make the underlying real hard header */
86 dev = vlan->real_dev;
87 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
88 if (rc > 0)
89 rc += vhdrlen;
90 return rc;
91 }
92
93 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
94 {
95 #ifdef CONFIG_NET_POLL_CONTROLLER
96 if (vlan->netpoll)
97 netpoll_send_skb(vlan->netpoll, skb);
98 #else
99 BUG();
100 #endif
101 return NETDEV_TX_OK;
102 }
103
104 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
105 struct net_device *dev)
106 {
107 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
108 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
109 unsigned int len;
110 int ret;
111
112 /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
113 *
114 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
115 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
116 */
117 if (veth->h_vlan_proto != vlan->vlan_proto ||
118 vlan->flags & VLAN_FLAG_REORDER_HDR) {
119 u16 vlan_tci;
120 vlan_tci = vlan->vlan_id;
121 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
122 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
123 }
124
125 skb->dev = vlan->real_dev;
126 len = skb->len;
127 if (unlikely(netpoll_tx_running(dev)))
128 return vlan_netpoll_send_skb(vlan, skb);
129
130 ret = dev_queue_xmit(skb);
131
132 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
133 struct vlan_pcpu_stats *stats;
134
135 stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
136 u64_stats_update_begin(&stats->syncp);
137 stats->tx_packets++;
138 stats->tx_bytes += len;
139 u64_stats_update_end(&stats->syncp);
140 } else {
141 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
142 }
143
144 return ret;
145 }
146
147 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
148 {
149 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
150 unsigned int max_mtu = real_dev->mtu;
151
152 if (netif_reduces_vlan_mtu(real_dev))
153 max_mtu -= VLAN_HLEN;
154 if (max_mtu < new_mtu)
155 return -ERANGE;
156
157 dev->mtu = new_mtu;
158
159 return 0;
160 }
161
162 void vlan_dev_set_ingress_priority(const struct net_device *dev,
163 u32 skb_prio, u16 vlan_prio)
164 {
165 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
166
167 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
168 vlan->nr_ingress_mappings--;
169 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
170 vlan->nr_ingress_mappings++;
171
172 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
173 }
174
175 int vlan_dev_set_egress_priority(const struct net_device *dev,
176 u32 skb_prio, u16 vlan_prio)
177 {
178 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
179 struct vlan_priority_tci_mapping *mp = NULL;
180 struct vlan_priority_tci_mapping *np;
181 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
182
183 /* See if a priority mapping exists.. */
184 mp = vlan->egress_priority_map[skb_prio & 0xF];
185 while (mp) {
186 if (mp->priority == skb_prio) {
187 if (mp->vlan_qos && !vlan_qos)
188 vlan->nr_egress_mappings--;
189 else if (!mp->vlan_qos && vlan_qos)
190 vlan->nr_egress_mappings++;
191 mp->vlan_qos = vlan_qos;
192 return 0;
193 }
194 mp = mp->next;
195 }
196
197 /* Create a new mapping then. */
198 mp = vlan->egress_priority_map[skb_prio & 0xF];
199 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
200 if (!np)
201 return -ENOBUFS;
202
203 np->next = mp;
204 np->priority = skb_prio;
205 np->vlan_qos = vlan_qos;
206 /* Before inserting this element in hash table, make sure all its fields
207 * are committed to memory.
208 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
209 */
210 smp_wmb();
211 vlan->egress_priority_map[skb_prio & 0xF] = np;
212 if (vlan_qos)
213 vlan->nr_egress_mappings++;
214 return 0;
215 }
216
217 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
218 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
219 {
220 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
221 u32 old_flags = vlan->flags;
222
223 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
224 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
225 return -EINVAL;
226
227 vlan->flags = (old_flags & ~mask) | (flags & mask);
228
229 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
230 if (vlan->flags & VLAN_FLAG_GVRP)
231 vlan_gvrp_request_join(dev);
232 else
233 vlan_gvrp_request_leave(dev);
234 }
235
236 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
237 if (vlan->flags & VLAN_FLAG_MVRP)
238 vlan_mvrp_request_join(dev);
239 else
240 vlan_mvrp_request_leave(dev);
241 }
242 return 0;
243 }
244
245 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
246 {
247 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
248 }
249
250 bool vlan_dev_inherit_address(struct net_device *dev,
251 struct net_device *real_dev)
252 {
253 if (dev->addr_assign_type != NET_ADDR_STOLEN)
254 return false;
255
256 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
257 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
258 return true;
259 }
260
261 static int vlan_dev_open(struct net_device *dev)
262 {
263 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
264 struct net_device *real_dev = vlan->real_dev;
265 int err;
266
267 if (!(real_dev->flags & IFF_UP) &&
268 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
269 return -ENETDOWN;
270
271 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) &&
272 !vlan_dev_inherit_address(dev, real_dev)) {
273 err = dev_uc_add(real_dev, dev->dev_addr);
274 if (err < 0)
275 goto out;
276 }
277
278 if (dev->flags & IFF_ALLMULTI) {
279 err = dev_set_allmulti(real_dev, 1);
280 if (err < 0)
281 goto del_unicast;
282 }
283 if (dev->flags & IFF_PROMISC) {
284 err = dev_set_promiscuity(real_dev, 1);
285 if (err < 0)
286 goto clear_allmulti;
287 }
288
289 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
290
291 if (vlan->flags & VLAN_FLAG_GVRP)
292 vlan_gvrp_request_join(dev);
293
294 if (vlan->flags & VLAN_FLAG_MVRP)
295 vlan_mvrp_request_join(dev);
296
297 if (netif_carrier_ok(real_dev))
298 netif_carrier_on(dev);
299 return 0;
300
301 clear_allmulti:
302 if (dev->flags & IFF_ALLMULTI)
303 dev_set_allmulti(real_dev, -1);
304 del_unicast:
305 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
306 dev_uc_del(real_dev, dev->dev_addr);
307 out:
308 netif_carrier_off(dev);
309 return err;
310 }
311
312 static int vlan_dev_stop(struct net_device *dev)
313 {
314 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
315 struct net_device *real_dev = vlan->real_dev;
316
317 dev_mc_unsync(real_dev, dev);
318 dev_uc_unsync(real_dev, dev);
319 if (dev->flags & IFF_ALLMULTI)
320 dev_set_allmulti(real_dev, -1);
321 if (dev->flags & IFF_PROMISC)
322 dev_set_promiscuity(real_dev, -1);
323
324 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
325 dev_uc_del(real_dev, dev->dev_addr);
326
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 SIOCGMIIPHY:
369 case SIOCGMIIREG:
370 case SIOCSMIIREG:
371 case SIOCSHWTSTAMP:
372 case SIOCGHWTSTAMP:
373 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
374 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
375 break;
376 }
377
378 if (!err)
379 ifr->ifr_ifru = ifrr.ifr_ifru;
380
381 return err;
382 }
383
384 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
385 {
386 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
387 const struct net_device_ops *ops = real_dev->netdev_ops;
388 int err = 0;
389
390 if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
391 err = ops->ndo_neigh_setup(real_dev, pa);
392
393 return err;
394 }
395
396 #if IS_ENABLED(CONFIG_FCOE)
397 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
398 struct scatterlist *sgl, unsigned int sgc)
399 {
400 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
401 const struct net_device_ops *ops = real_dev->netdev_ops;
402 int rc = 0;
403
404 if (ops->ndo_fcoe_ddp_setup)
405 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
406
407 return rc;
408 }
409
410 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
411 {
412 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
413 const struct net_device_ops *ops = real_dev->netdev_ops;
414 int len = 0;
415
416 if (ops->ndo_fcoe_ddp_done)
417 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
418
419 return len;
420 }
421
422 static int vlan_dev_fcoe_enable(struct net_device *dev)
423 {
424 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
425 const struct net_device_ops *ops = real_dev->netdev_ops;
426 int rc = -EINVAL;
427
428 if (ops->ndo_fcoe_enable)
429 rc = ops->ndo_fcoe_enable(real_dev);
430 return rc;
431 }
432
433 static int vlan_dev_fcoe_disable(struct net_device *dev)
434 {
435 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
436 const struct net_device_ops *ops = real_dev->netdev_ops;
437 int rc = -EINVAL;
438
439 if (ops->ndo_fcoe_disable)
440 rc = ops->ndo_fcoe_disable(real_dev);
441 return rc;
442 }
443
444 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
445 {
446 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
447 const struct net_device_ops *ops = real_dev->netdev_ops;
448 int rc = -EINVAL;
449
450 if (ops->ndo_fcoe_get_wwn)
451 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
452 return rc;
453 }
454
455 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
456 struct scatterlist *sgl, unsigned int sgc)
457 {
458 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
459 const struct net_device_ops *ops = real_dev->netdev_ops;
460 int rc = 0;
461
462 if (ops->ndo_fcoe_ddp_target)
463 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
464
465 return rc;
466 }
467 #endif
468
469 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
470 {
471 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
472
473 if (dev->flags & IFF_UP) {
474 if (change & IFF_ALLMULTI)
475 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
476 if (change & IFF_PROMISC)
477 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
478 }
479 }
480
481 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
482 {
483 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
484 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
485 }
486
487 /*
488 * vlan network devices have devices nesting below it, and are a special
489 * "super class" of normal network devices; split their locks off into a
490 * separate class since they always nest.
491 */
492 static struct lock_class_key vlan_netdev_xmit_lock_key;
493 static struct lock_class_key vlan_netdev_addr_lock_key;
494
495 static void vlan_dev_set_lockdep_one(struct net_device *dev,
496 struct netdev_queue *txq,
497 void *_subclass)
498 {
499 lockdep_set_class_and_subclass(&txq->_xmit_lock,
500 &vlan_netdev_xmit_lock_key,
501 *(int *)_subclass);
502 }
503
504 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
505 {
506 lockdep_set_class_and_subclass(&dev->addr_list_lock,
507 &vlan_netdev_addr_lock_key,
508 subclass);
509 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
510 }
511
512 static int vlan_dev_get_lock_subclass(struct net_device *dev)
513 {
514 return vlan_dev_priv(dev)->nest_level;
515 }
516
517 static const struct header_ops vlan_header_ops = {
518 .create = vlan_dev_hard_header,
519 .parse = eth_header_parse,
520 };
521
522 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
523 unsigned short type,
524 const void *daddr, const void *saddr,
525 unsigned int len)
526 {
527 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
528 struct net_device *real_dev = vlan->real_dev;
529
530 if (saddr == NULL)
531 saddr = dev->dev_addr;
532
533 return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
534 }
535
536 static const struct header_ops vlan_passthru_header_ops = {
537 .create = vlan_passthru_hard_header,
538 .parse = eth_header_parse,
539 };
540
541 static struct device_type vlan_type = {
542 .name = "vlan",
543 };
544
545 static const struct net_device_ops vlan_netdev_ops;
546
547 static int vlan_dev_init(struct net_device *dev)
548 {
549 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
550
551 netif_carrier_off(dev);
552
553 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
554 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
555 IFF_MASTER | IFF_SLAVE);
556 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
557 (1<<__LINK_STATE_DORMANT))) |
558 (1<<__LINK_STATE_PRESENT);
559
560 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
561 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
562 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
563 NETIF_F_ALL_FCOE;
564
565 dev->features |= dev->hw_features | NETIF_F_LLTX;
566 dev->gso_max_size = real_dev->gso_max_size;
567 dev->gso_max_segs = real_dev->gso_max_segs;
568 if (dev->features & NETIF_F_VLAN_FEATURES)
569 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
570
571 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
572
573 /* ipv6 shared card related stuff */
574 dev->dev_id = real_dev->dev_id;
575
576 if (is_zero_ether_addr(dev->dev_addr)) {
577 ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
578 dev->addr_assign_type = NET_ADDR_STOLEN;
579 }
580 if (is_zero_ether_addr(dev->broadcast))
581 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
582
583 #if IS_ENABLED(CONFIG_FCOE)
584 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
585 #endif
586
587 dev->needed_headroom = real_dev->needed_headroom;
588 if (vlan_hw_offload_capable(real_dev->features,
589 vlan_dev_priv(dev)->vlan_proto)) {
590 dev->header_ops = &vlan_passthru_header_ops;
591 dev->hard_header_len = real_dev->hard_header_len;
592 } else {
593 dev->header_ops = &vlan_header_ops;
594 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
595 }
596
597 dev->netdev_ops = &vlan_netdev_ops;
598
599 SET_NETDEV_DEVTYPE(dev, &vlan_type);
600
601 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev));
602
603 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
604 if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
605 return -ENOMEM;
606
607 return 0;
608 }
609
610 static void vlan_dev_uninit(struct net_device *dev)
611 {
612 struct vlan_priority_tci_mapping *pm;
613 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
614 int i;
615
616 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
617 while ((pm = vlan->egress_priority_map[i]) != NULL) {
618 vlan->egress_priority_map[i] = pm->next;
619 kfree(pm);
620 }
621 }
622 }
623
624 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
625 netdev_features_t features)
626 {
627 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
628 netdev_features_t old_features = features;
629 netdev_features_t lower_features;
630
631 lower_features = netdev_intersect_features((real_dev->vlan_features |
632 NETIF_F_RXCSUM),
633 real_dev->features);
634
635 /* Add HW_CSUM setting to preserve user ability to control
636 * checksum offload on the vlan device.
637 */
638 if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
639 lower_features |= NETIF_F_HW_CSUM;
640 features = netdev_intersect_features(features, lower_features);
641 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
642 features |= NETIF_F_LLTX;
643
644 return features;
645 }
646
647 static int vlan_ethtool_get_link_ksettings(struct net_device *dev,
648 struct ethtool_link_ksettings *cmd)
649 {
650 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
651
652 return __ethtool_get_link_ksettings(vlan->real_dev, cmd);
653 }
654
655 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
656 struct ethtool_drvinfo *info)
657 {
658 strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
659 strlcpy(info->version, vlan_version, sizeof(info->version));
660 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
661 }
662
663 static int vlan_ethtool_get_ts_info(struct net_device *dev,
664 struct ethtool_ts_info *info)
665 {
666 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
667 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
668
669 if (ops->get_ts_info) {
670 return ops->get_ts_info(vlan->real_dev, info);
671 } else {
672 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
673 SOF_TIMESTAMPING_SOFTWARE;
674 info->phc_index = -1;
675 }
676
677 return 0;
678 }
679
680 static void vlan_dev_get_stats64(struct net_device *dev,
681 struct rtnl_link_stats64 *stats)
682 {
683 struct vlan_pcpu_stats *p;
684 u32 rx_errors = 0, tx_dropped = 0;
685 int i;
686
687 for_each_possible_cpu(i) {
688 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
689 unsigned int start;
690
691 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
692 do {
693 start = u64_stats_fetch_begin_irq(&p->syncp);
694 rxpackets = p->rx_packets;
695 rxbytes = p->rx_bytes;
696 rxmulticast = p->rx_multicast;
697 txpackets = p->tx_packets;
698 txbytes = p->tx_bytes;
699 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
700
701 stats->rx_packets += rxpackets;
702 stats->rx_bytes += rxbytes;
703 stats->multicast += rxmulticast;
704 stats->tx_packets += txpackets;
705 stats->tx_bytes += txbytes;
706 /* rx_errors & tx_dropped are u32 */
707 rx_errors += p->rx_errors;
708 tx_dropped += p->tx_dropped;
709 }
710 stats->rx_errors = rx_errors;
711 stats->tx_dropped = tx_dropped;
712 }
713
714 #ifdef CONFIG_NET_POLL_CONTROLLER
715 static void vlan_dev_poll_controller(struct net_device *dev)
716 {
717 return;
718 }
719
720 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
721 {
722 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
723 struct net_device *real_dev = vlan->real_dev;
724 struct netpoll *netpoll;
725 int err = 0;
726
727 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
728 err = -ENOMEM;
729 if (!netpoll)
730 goto out;
731
732 err = __netpoll_setup(netpoll, real_dev);
733 if (err) {
734 kfree(netpoll);
735 goto out;
736 }
737
738 vlan->netpoll = netpoll;
739
740 out:
741 return err;
742 }
743
744 static void vlan_dev_netpoll_cleanup(struct net_device *dev)
745 {
746 struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
747 struct netpoll *netpoll = vlan->netpoll;
748
749 if (!netpoll)
750 return;
751
752 vlan->netpoll = NULL;
753
754 __netpoll_free_async(netpoll);
755 }
756 #endif /* CONFIG_NET_POLL_CONTROLLER */
757
758 static int vlan_dev_get_iflink(const struct net_device *dev)
759 {
760 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
761
762 return real_dev->ifindex;
763 }
764
765 static const struct ethtool_ops vlan_ethtool_ops = {
766 .get_link_ksettings = vlan_ethtool_get_link_ksettings,
767 .get_drvinfo = vlan_ethtool_get_drvinfo,
768 .get_link = ethtool_op_get_link,
769 .get_ts_info = vlan_ethtool_get_ts_info,
770 };
771
772 static const struct net_device_ops vlan_netdev_ops = {
773 .ndo_change_mtu = vlan_dev_change_mtu,
774 .ndo_init = vlan_dev_init,
775 .ndo_uninit = vlan_dev_uninit,
776 .ndo_open = vlan_dev_open,
777 .ndo_stop = vlan_dev_stop,
778 .ndo_start_xmit = vlan_dev_hard_start_xmit,
779 .ndo_validate_addr = eth_validate_addr,
780 .ndo_set_mac_address = vlan_dev_set_mac_address,
781 .ndo_set_rx_mode = vlan_dev_set_rx_mode,
782 .ndo_change_rx_flags = vlan_dev_change_rx_flags,
783 .ndo_do_ioctl = vlan_dev_ioctl,
784 .ndo_neigh_setup = vlan_dev_neigh_setup,
785 .ndo_get_stats64 = vlan_dev_get_stats64,
786 #if IS_ENABLED(CONFIG_FCOE)
787 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
788 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
789 .ndo_fcoe_enable = vlan_dev_fcoe_enable,
790 .ndo_fcoe_disable = vlan_dev_fcoe_disable,
791 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
792 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
793 #endif
794 #ifdef CONFIG_NET_POLL_CONTROLLER
795 .ndo_poll_controller = vlan_dev_poll_controller,
796 .ndo_netpoll_setup = vlan_dev_netpoll_setup,
797 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
798 #endif
799 .ndo_fix_features = vlan_dev_fix_features,
800 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass,
801 .ndo_get_iflink = vlan_dev_get_iflink,
802 };
803
804 static void vlan_dev_free(struct net_device *dev)
805 {
806 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
807
808 free_percpu(vlan->vlan_pcpu_stats);
809 vlan->vlan_pcpu_stats = NULL;
810 }
811
812 void vlan_setup(struct net_device *dev)
813 {
814 ether_setup(dev);
815
816 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE;
817 dev->priv_flags |= IFF_UNICAST_FLT;
818 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
819 netif_keep_dst(dev);
820
821 dev->netdev_ops = &vlan_netdev_ops;
822 dev->needs_free_netdev = true;
823 dev->priv_destructor = vlan_dev_free;
824 dev->ethtool_ops = &vlan_ethtool_ops;
825
826 dev->min_mtu = 0;
827 dev->max_mtu = ETH_MAX_MTU;
828
829 eth_zero_addr(dev->broadcast);
830 }
CRIS linux kernel tree