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 #include <linux/module.h> 24 #include <linux/slab.h> 25 #include <linux/skbuff.h> 26 #include <linux/netdevice.h> 27 #include <linux/etherdevice.h> 28 #include <linux/ethtool.h> 29 #include <net/arp.h> 30 31 #include "vlan.h" 32 #include "vlanproc.h" 33 #include <linux/if_vlan.h> 34 35 /* 36 * Rebuild the Ethernet MAC header. This is called after an ARP 37 * (or in future other address resolution) has completed on this 38 * sk_buff. We now let ARP fill in the other fields. 39 * 40 * This routine CANNOT use cached dst->neigh! 41 * Really, it is used only when dst->neigh is wrong. 42 * 43 * TODO: This needs a checkup, I'm ignorant here. --BLG 44 */ 45 static int vlan_dev_rebuild_header(struct sk_buff *skb) 46 { 47 struct net_device *dev = skb->dev; 48 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 49 50 switch (veth->h_vlan_encapsulated_proto) { 51 #ifdef CONFIG_INET 52 case htons(ETH_P_IP): 53 54 /* TODO: Confirm this will work with VLAN headers... */ 55 return arp_find(veth->h_dest, skb); 56 #endif 57 default: 58 pr_debug("%s: unable to resolve type %X addresses.\n", 59 dev->name, ntohs(veth->h_vlan_encapsulated_proto)); 60 61 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); 62 break; 63 } 64 65 return 0; 66 } 67 68 static inline u16 69 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) 70 { 71 struct vlan_priority_tci_mapping *mp; 72 73 mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; 74 while (mp) { 75 if (mp->priority == skb->priority) { 76 return mp->vlan_qos; /* This should already be shifted 77 * to mask correctly with the 78 * VLAN's TCI */ 79 } 80 mp = mp->next; 81 } 82 return 0; 83 } 84 85 /* 86 * Create the VLAN header for an arbitrary protocol layer 87 * 88 * saddr=NULL means use device source address 89 * daddr=NULL means leave destination address (eg unresolved arp) 90 * 91 * This is called when the SKB is moving down the stack towards the 92 * physical devices. 93 */ 94 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 95 unsigned short type, 96 const void *daddr, const void *saddr, 97 unsigned int len) 98 { 99 struct vlan_hdr *vhdr; 100 unsigned int vhdrlen = 0; 101 u16 vlan_tci = 0; 102 int rc; 103 104 if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) { 105 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 106 107 vlan_tci = vlan_dev_info(dev)->vlan_id; 108 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 109 vhdr->h_vlan_TCI = htons(vlan_tci); 110 111 /* 112 * Set the protocol type. For a packet of type ETH_P_802_3/2 we 113 * put the length in here instead. 114 */ 115 if (type != ETH_P_802_3 && type != ETH_P_802_2) 116 vhdr->h_vlan_encapsulated_proto = htons(type); 117 else 118 vhdr->h_vlan_encapsulated_proto = htons(len); 119 120 skb->protocol = htons(ETH_P_8021Q); 121 type = ETH_P_8021Q; 122 vhdrlen = VLAN_HLEN; 123 } 124 125 /* Before delegating work to the lower layer, enter our MAC-address */ 126 if (saddr == NULL) 127 saddr = dev->dev_addr; 128 129 /* Now make the underlying real hard header */ 130 dev = vlan_dev_info(dev)->real_dev; 131 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 132 if (rc > 0) 133 rc += vhdrlen; 134 return rc; 135 } 136 137 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 138 struct net_device *dev) 139 { 140 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 141 unsigned int len; 142 int ret; 143 144 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 145 * 146 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 147 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 148 */ 149 if (veth->h_vlan_proto != htons(ETH_P_8021Q) || 150 vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { 151 u16 vlan_tci; 152 vlan_tci = vlan_dev_info(dev)->vlan_id; 153 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 154 skb = __vlan_hwaccel_put_tag(skb, vlan_tci); 155 } 156 157 skb_set_dev(skb, vlan_dev_info(dev)->real_dev); 158 len = skb->len; 159 ret = dev_queue_xmit(skb); 160 161 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { 162 struct vlan_pcpu_stats *stats; 163 164 stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats); 165 u64_stats_update_begin(&stats->syncp); 166 stats->tx_packets++; 167 stats->tx_bytes += len; 168 u64_stats_update_end(&stats->syncp); 169 } else { 170 this_cpu_inc(vlan_dev_info(dev)->vlan_pcpu_stats->tx_dropped); 171 } 172 173 return ret; 174 } 175 176 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 177 { 178 /* TODO: gotta make sure the underlying layer can handle it, 179 * maybe an IFF_VLAN_CAPABLE flag for devices? 180 */ 181 if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) 182 return -ERANGE; 183 184 dev->mtu = new_mtu; 185 186 return 0; 187 } 188 189 void vlan_dev_set_ingress_priority(const struct net_device *dev, 190 u32 skb_prio, u16 vlan_prio) 191 { 192 struct vlan_dev_info *vlan = vlan_dev_info(dev); 193 194 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 195 vlan->nr_ingress_mappings--; 196 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 197 vlan->nr_ingress_mappings++; 198 199 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 200 } 201 202 int vlan_dev_set_egress_priority(const struct net_device *dev, 203 u32 skb_prio, u16 vlan_prio) 204 { 205 struct vlan_dev_info *vlan = vlan_dev_info(dev); 206 struct vlan_priority_tci_mapping *mp = NULL; 207 struct vlan_priority_tci_mapping *np; 208 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 209 210 /* See if a priority mapping exists.. */ 211 mp = vlan->egress_priority_map[skb_prio & 0xF]; 212 while (mp) { 213 if (mp->priority == skb_prio) { 214 if (mp->vlan_qos && !vlan_qos) 215 vlan->nr_egress_mappings--; 216 else if (!mp->vlan_qos && vlan_qos) 217 vlan->nr_egress_mappings++; 218 mp->vlan_qos = vlan_qos; 219 return 0; 220 } 221 mp = mp->next; 222 } 223 224 /* Create a new mapping then. */ 225 mp = vlan->egress_priority_map[skb_prio & 0xF]; 226 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 227 if (!np) 228 return -ENOBUFS; 229 230 np->next = mp; 231 np->priority = skb_prio; 232 np->vlan_qos = vlan_qos; 233 vlan->egress_priority_map[skb_prio & 0xF] = np; 234 if (vlan_qos) 235 vlan->nr_egress_mappings++; 236 return 0; 237 } 238 239 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 240 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 241 { 242 struct vlan_dev_info *vlan = vlan_dev_info(dev); 243 u32 old_flags = vlan->flags; 244 245 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 246 VLAN_FLAG_LOOSE_BINDING)) 247 return -EINVAL; 248 249 vlan->flags = (old_flags & ~mask) | (flags & mask); 250 251 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 252 if (vlan->flags & VLAN_FLAG_GVRP) 253 vlan_gvrp_request_join(dev); 254 else 255 vlan_gvrp_request_leave(dev); 256 } 257 return 0; 258 } 259 260 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 261 { 262 strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); 263 } 264 265 static int vlan_dev_open(struct net_device *dev) 266 { 267 struct vlan_dev_info *vlan = vlan_dev_info(dev); 268 struct net_device *real_dev = vlan->real_dev; 269 int err; 270 271 if (!(real_dev->flags & IFF_UP) && 272 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 273 return -ENETDOWN; 274 275 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { 276 err = dev_uc_add(real_dev, dev->dev_addr); 277 if (err < 0) 278 goto out; 279 } 280 281 if (dev->flags & IFF_ALLMULTI) { 282 err = dev_set_allmulti(real_dev, 1); 283 if (err < 0) 284 goto del_unicast; 285 } 286 if (dev->flags & IFF_PROMISC) { 287 err = dev_set_promiscuity(real_dev, 1); 288 if (err < 0) 289 goto clear_allmulti; 290 } 291 292 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 293 294 if (vlan->flags & VLAN_FLAG_GVRP) 295 vlan_gvrp_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 (compare_ether_addr(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_info *vlan = vlan_dev_info(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 (compare_ether_addr(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_info(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 (compare_ether_addr(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 (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 350 dev_uc_del(real_dev, dev->dev_addr); 351 352 out: 353 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 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_info(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 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 372 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 373 break; 374 } 375 376 if (!err) 377 ifr->ifr_ifru = ifrr.ifr_ifru; 378 379 return err; 380 } 381 382 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 383 { 384 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 385 const struct net_device_ops *ops = real_dev->netdev_ops; 386 int err = 0; 387 388 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 389 err = ops->ndo_neigh_setup(real_dev, pa); 390 391 return err; 392 } 393 394 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 395 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 396 struct scatterlist *sgl, unsigned int sgc) 397 { 398 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 399 const struct net_device_ops *ops = real_dev->netdev_ops; 400 int rc = 0; 401 402 if (ops->ndo_fcoe_ddp_setup) 403 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 404 405 return rc; 406 } 407 408 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 409 { 410 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 411 const struct net_device_ops *ops = real_dev->netdev_ops; 412 int len = 0; 413 414 if (ops->ndo_fcoe_ddp_done) 415 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 416 417 return len; 418 } 419 420 static int vlan_dev_fcoe_enable(struct net_device *dev) 421 { 422 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 423 const struct net_device_ops *ops = real_dev->netdev_ops; 424 int rc = -EINVAL; 425 426 if (ops->ndo_fcoe_enable) 427 rc = ops->ndo_fcoe_enable(real_dev); 428 return rc; 429 } 430 431 static int vlan_dev_fcoe_disable(struct net_device *dev) 432 { 433 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 434 const struct net_device_ops *ops = real_dev->netdev_ops; 435 int rc = -EINVAL; 436 437 if (ops->ndo_fcoe_disable) 438 rc = ops->ndo_fcoe_disable(real_dev); 439 return rc; 440 } 441 442 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 443 { 444 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 445 const struct net_device_ops *ops = real_dev->netdev_ops; 446 int rc = -EINVAL; 447 448 if (ops->ndo_fcoe_get_wwn) 449 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 450 return rc; 451 } 452 453 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 454 struct scatterlist *sgl, unsigned int sgc) 455 { 456 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 457 const struct net_device_ops *ops = real_dev->netdev_ops; 458 int rc = 0; 459 460 if (ops->ndo_fcoe_ddp_target) 461 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 462 463 return rc; 464 } 465 #endif 466 467 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 468 { 469 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 470 471 if (change & IFF_ALLMULTI) 472 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 473 if (change & IFF_PROMISC) 474 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 475 } 476 477 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 478 { 479 dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 480 dev_uc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 481 } 482 483 /* 484 * vlan network devices have devices nesting below it, and are a special 485 * "super class" of normal network devices; split their locks off into a 486 * separate class since they always nest. 487 */ 488 static struct lock_class_key vlan_netdev_xmit_lock_key; 489 static struct lock_class_key vlan_netdev_addr_lock_key; 490 491 static void vlan_dev_set_lockdep_one(struct net_device *dev, 492 struct netdev_queue *txq, 493 void *_subclass) 494 { 495 lockdep_set_class_and_subclass(&txq->_xmit_lock, 496 &vlan_netdev_xmit_lock_key, 497 *(int *)_subclass); 498 } 499 500 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 501 { 502 lockdep_set_class_and_subclass(&dev->addr_list_lock, 503 &vlan_netdev_addr_lock_key, 504 subclass); 505 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 506 } 507 508 static const struct header_ops vlan_header_ops = { 509 .create = vlan_dev_hard_header, 510 .rebuild = vlan_dev_rebuild_header, 511 .parse = eth_header_parse, 512 }; 513 514 static const struct net_device_ops vlan_netdev_ops; 515 516 static int vlan_dev_init(struct net_device *dev) 517 { 518 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 519 int subclass = 0; 520 521 netif_carrier_off(dev); 522 523 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 524 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 525 IFF_MASTER | IFF_SLAVE); 526 dev->iflink = real_dev->ifindex; 527 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 528 (1<<__LINK_STATE_DORMANT))) | 529 (1<<__LINK_STATE_PRESENT); 530 531 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | 532 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | 533 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | 534 NETIF_F_ALL_FCOE; 535 536 dev->features |= real_dev->vlan_features | NETIF_F_LLTX; 537 dev->gso_max_size = real_dev->gso_max_size; 538 539 /* ipv6 shared card related stuff */ 540 dev->dev_id = real_dev->dev_id; 541 542 if (is_zero_ether_addr(dev->dev_addr)) 543 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); 544 if (is_zero_ether_addr(dev->broadcast)) 545 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 546 547 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 548 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 549 #endif 550 551 dev->needed_headroom = real_dev->needed_headroom; 552 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 553 dev->header_ops = real_dev->header_ops; 554 dev->hard_header_len = real_dev->hard_header_len; 555 } else { 556 dev->header_ops = &vlan_header_ops; 557 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 558 } 559 560 dev->netdev_ops = &vlan_netdev_ops; 561 562 if (is_vlan_dev(real_dev)) 563 subclass = 1; 564 565 vlan_dev_set_lockdep_class(dev, subclass); 566 567 vlan_dev_info(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats); 568 if (!vlan_dev_info(dev)->vlan_pcpu_stats) 569 return -ENOMEM; 570 571 return 0; 572 } 573 574 static void vlan_dev_uninit(struct net_device *dev) 575 { 576 struct vlan_priority_tci_mapping *pm; 577 struct vlan_dev_info *vlan = vlan_dev_info(dev); 578 int i; 579 580 free_percpu(vlan->vlan_pcpu_stats); 581 vlan->vlan_pcpu_stats = NULL; 582 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 583 while ((pm = vlan->egress_priority_map[i]) != NULL) { 584 vlan->egress_priority_map[i] = pm->next; 585 kfree(pm); 586 } 587 } 588 } 589 590 static u32 vlan_dev_fix_features(struct net_device *dev, u32 features) 591 { 592 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 593 u32 old_features = features; 594 595 features &= real_dev->features; 596 features &= real_dev->vlan_features; 597 598 if (old_features & NETIF_F_SOFT_FEATURES) 599 features |= old_features & NETIF_F_SOFT_FEATURES; 600 601 if (dev_ethtool_get_rx_csum(real_dev)) 602 features |= NETIF_F_RXCSUM; 603 features |= NETIF_F_LLTX; 604 605 return features; 606 } 607 608 static int vlan_ethtool_get_settings(struct net_device *dev, 609 struct ethtool_cmd *cmd) 610 { 611 const struct vlan_dev_info *vlan = vlan_dev_info(dev); 612 return dev_ethtool_get_settings(vlan->real_dev, cmd); 613 } 614 615 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 616 struct ethtool_drvinfo *info) 617 { 618 strcpy(info->driver, vlan_fullname); 619 strcpy(info->version, vlan_version); 620 strcpy(info->fw_version, "N/A"); 621 } 622 623 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 624 { 625 626 if (vlan_dev_info(dev)->vlan_pcpu_stats) { 627 struct vlan_pcpu_stats *p; 628 u32 rx_errors = 0, tx_dropped = 0; 629 int i; 630 631 for_each_possible_cpu(i) { 632 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 633 unsigned int start; 634 635 p = per_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats, i); 636 do { 637 start = u64_stats_fetch_begin_bh(&p->syncp); 638 rxpackets = p->rx_packets; 639 rxbytes = p->rx_bytes; 640 rxmulticast = p->rx_multicast; 641 txpackets = p->tx_packets; 642 txbytes = p->tx_bytes; 643 } while (u64_stats_fetch_retry_bh(&p->syncp, start)); 644 645 stats->rx_packets += rxpackets; 646 stats->rx_bytes += rxbytes; 647 stats->multicast += rxmulticast; 648 stats->tx_packets += txpackets; 649 stats->tx_bytes += txbytes; 650 /* rx_errors & tx_dropped are u32 */ 651 rx_errors += p->rx_errors; 652 tx_dropped += p->tx_dropped; 653 } 654 stats->rx_errors = rx_errors; 655 stats->tx_dropped = tx_dropped; 656 } 657 return stats; 658 } 659 660 static const struct ethtool_ops vlan_ethtool_ops = { 661 .get_settings = vlan_ethtool_get_settings, 662 .get_drvinfo = vlan_ethtool_get_drvinfo, 663 .get_link = ethtool_op_get_link, 664 }; 665 666 static const struct net_device_ops vlan_netdev_ops = { 667 .ndo_change_mtu = vlan_dev_change_mtu, 668 .ndo_init = vlan_dev_init, 669 .ndo_uninit = vlan_dev_uninit, 670 .ndo_open = vlan_dev_open, 671 .ndo_stop = vlan_dev_stop, 672 .ndo_start_xmit = vlan_dev_hard_start_xmit, 673 .ndo_validate_addr = eth_validate_addr, 674 .ndo_set_mac_address = vlan_dev_set_mac_address, 675 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 676 .ndo_set_multicast_list = vlan_dev_set_rx_mode, 677 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 678 .ndo_do_ioctl = vlan_dev_ioctl, 679 .ndo_neigh_setup = vlan_dev_neigh_setup, 680 .ndo_get_stats64 = vlan_dev_get_stats64, 681 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 682 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 683 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 684 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 685 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 686 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 687 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 688 #endif 689 .ndo_fix_features = vlan_dev_fix_features, 690 }; 691 692 void vlan_setup(struct net_device *dev) 693 { 694 ether_setup(dev); 695 696 dev->priv_flags |= IFF_802_1Q_VLAN; 697 dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 698 dev->tx_queue_len = 0; 699 700 dev->netdev_ops = &vlan_netdev_ops; 701 dev->destructor = free_netdev; 702 dev->ethtool_ops = &vlan_ethtool_ops; 703 704 memset(dev->broadcast, 0, ETH_ALEN); 705 } 706