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/etherdevice.h> 30 #include <linux/ethtool.h> 31 #include <net/arp.h> 32 33 #include "vlan.h" 34 #include "vlanproc.h" 35 #include <linux/if_vlan.h> 36 #include <linux/netpoll.h> 37 38 /* 39 * Rebuild the Ethernet MAC header. This is called after an ARP 40 * (or in future other address resolution) has completed on this 41 * sk_buff. We now let ARP fill in the other fields. 42 * 43 * This routine CANNOT use cached dst->neigh! 44 * Really, it is used only when dst->neigh is wrong. 45 * 46 * TODO: This needs a checkup, I'm ignorant here. --BLG 47 */ 48 static int vlan_dev_rebuild_header(struct sk_buff *skb) 49 { 50 struct net_device *dev = skb->dev; 51 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 52 53 switch (veth->h_vlan_encapsulated_proto) { 54 #ifdef CONFIG_INET 55 case htons(ETH_P_IP): 56 57 /* TODO: Confirm this will work with VLAN headers... */ 58 return arp_find(veth->h_dest, skb); 59 #endif 60 default: 61 pr_debug("%s: unable to resolve type %X addresses\n", 62 dev->name, ntohs(veth->h_vlan_encapsulated_proto)); 63 64 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); 65 break; 66 } 67 68 return 0; 69 } 70 71 static inline u16 72 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) 73 { 74 struct vlan_priority_tci_mapping *mp; 75 76 mp = vlan_dev_priv(dev)->egress_priority_map[(skb->priority & 0xF)]; 77 while (mp) { 78 if (mp->priority == skb->priority) { 79 return mp->vlan_qos; /* This should already be shifted 80 * to mask correctly with the 81 * VLAN's TCI */ 82 } 83 mp = mp->next; 84 } 85 return 0; 86 } 87 88 /* 89 * Create the VLAN header for an arbitrary protocol layer 90 * 91 * saddr=NULL means use device source address 92 * daddr=NULL means leave destination address (eg unresolved arp) 93 * 94 * This is called when the SKB is moving down the stack towards the 95 * physical devices. 96 */ 97 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 98 unsigned short type, 99 const void *daddr, const void *saddr, 100 unsigned int len) 101 { 102 struct vlan_hdr *vhdr; 103 unsigned int vhdrlen = 0; 104 u16 vlan_tci = 0; 105 int rc; 106 107 if (!(vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR)) { 108 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 109 110 vlan_tci = vlan_dev_priv(dev)->vlan_id; 111 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 112 vhdr->h_vlan_TCI = htons(vlan_tci); 113 114 /* 115 * Set the protocol type. For a packet of type ETH_P_802_3/2 we 116 * put the length in here instead. 117 */ 118 if (type != ETH_P_802_3 && type != ETH_P_802_2) 119 vhdr->h_vlan_encapsulated_proto = htons(type); 120 else 121 vhdr->h_vlan_encapsulated_proto = htons(len); 122 123 skb->protocol = htons(ETH_P_8021Q); 124 type = ETH_P_8021Q; 125 vhdrlen = VLAN_HLEN; 126 } 127 128 /* Before delegating work to the lower layer, enter our MAC-address */ 129 if (saddr == NULL) 130 saddr = dev->dev_addr; 131 132 /* Now make the underlying real hard header */ 133 dev = vlan_dev_priv(dev)->real_dev; 134 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 135 if (rc > 0) 136 rc += vhdrlen; 137 return rc; 138 } 139 140 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 141 struct net_device *dev) 142 { 143 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 144 unsigned int len; 145 int ret; 146 147 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 148 * 149 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 150 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 151 */ 152 if (veth->h_vlan_proto != htons(ETH_P_8021Q) || 153 vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR) { 154 u16 vlan_tci; 155 vlan_tci = vlan_dev_priv(dev)->vlan_id; 156 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 157 skb = __vlan_hwaccel_put_tag(skb, vlan_tci); 158 } 159 160 skb->dev = vlan_dev_priv(dev)->real_dev; 161 len = skb->len; 162 if (netpoll_tx_running(dev)) 163 return skb->dev->netdev_ops->ndo_start_xmit(skb, skb->dev); 164 ret = dev_queue_xmit(skb); 165 166 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { 167 struct vlan_pcpu_stats *stats; 168 169 stats = this_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats); 170 u64_stats_update_begin(&stats->syncp); 171 stats->tx_packets++; 172 stats->tx_bytes += len; 173 u64_stats_update_end(&stats->syncp); 174 } else { 175 this_cpu_inc(vlan_dev_priv(dev)->vlan_pcpu_stats->tx_dropped); 176 } 177 178 return ret; 179 } 180 181 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 182 { 183 /* TODO: gotta make sure the underlying layer can handle it, 184 * maybe an IFF_VLAN_CAPABLE flag for devices? 185 */ 186 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) 187 return -ERANGE; 188 189 dev->mtu = new_mtu; 190 191 return 0; 192 } 193 194 void vlan_dev_set_ingress_priority(const struct net_device *dev, 195 u32 skb_prio, u16 vlan_prio) 196 { 197 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 198 199 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 200 vlan->nr_ingress_mappings--; 201 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 202 vlan->nr_ingress_mappings++; 203 204 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 205 } 206 207 int vlan_dev_set_egress_priority(const struct net_device *dev, 208 u32 skb_prio, u16 vlan_prio) 209 { 210 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 211 struct vlan_priority_tci_mapping *mp = NULL; 212 struct vlan_priority_tci_mapping *np; 213 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 214 215 /* See if a priority mapping exists.. */ 216 mp = vlan->egress_priority_map[skb_prio & 0xF]; 217 while (mp) { 218 if (mp->priority == skb_prio) { 219 if (mp->vlan_qos && !vlan_qos) 220 vlan->nr_egress_mappings--; 221 else if (!mp->vlan_qos && vlan_qos) 222 vlan->nr_egress_mappings++; 223 mp->vlan_qos = vlan_qos; 224 return 0; 225 } 226 mp = mp->next; 227 } 228 229 /* Create a new mapping then. */ 230 mp = vlan->egress_priority_map[skb_prio & 0xF]; 231 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 232 if (!np) 233 return -ENOBUFS; 234 235 np->next = mp; 236 np->priority = skb_prio; 237 np->vlan_qos = vlan_qos; 238 vlan->egress_priority_map[skb_prio & 0xF] = np; 239 if (vlan_qos) 240 vlan->nr_egress_mappings++; 241 return 0; 242 } 243 244 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 245 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 246 { 247 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 248 u32 old_flags = vlan->flags; 249 250 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 251 VLAN_FLAG_LOOSE_BINDING)) 252 return -EINVAL; 253 254 vlan->flags = (old_flags & ~mask) | (flags & mask); 255 256 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 257 if (vlan->flags & VLAN_FLAG_GVRP) 258 vlan_gvrp_request_join(dev); 259 else 260 vlan_gvrp_request_leave(dev); 261 } 262 return 0; 263 } 264 265 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 266 { 267 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); 268 } 269 270 static int vlan_dev_open(struct net_device *dev) 271 { 272 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 273 struct net_device *real_dev = vlan->real_dev; 274 int err; 275 276 if (!(real_dev->flags & IFF_UP) && 277 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 278 return -ENETDOWN; 279 280 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { 281 err = dev_uc_add(real_dev, dev->dev_addr); 282 if (err < 0) 283 goto out; 284 } 285 286 if (dev->flags & IFF_ALLMULTI) { 287 err = dev_set_allmulti(real_dev, 1); 288 if (err < 0) 289 goto del_unicast; 290 } 291 if (dev->flags & IFF_PROMISC) { 292 err = dev_set_promiscuity(real_dev, 1); 293 if (err < 0) 294 goto clear_allmulti; 295 } 296 297 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 298 299 if (vlan->flags & VLAN_FLAG_GVRP) 300 vlan_gvrp_request_join(dev); 301 302 if (netif_carrier_ok(real_dev)) 303 netif_carrier_on(dev); 304 return 0; 305 306 clear_allmulti: 307 if (dev->flags & IFF_ALLMULTI) 308 dev_set_allmulti(real_dev, -1); 309 del_unicast: 310 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 311 dev_uc_del(real_dev, dev->dev_addr); 312 out: 313 netif_carrier_off(dev); 314 return err; 315 } 316 317 static int vlan_dev_stop(struct net_device *dev) 318 { 319 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 320 struct net_device *real_dev = vlan->real_dev; 321 322 dev_mc_unsync(real_dev, dev); 323 dev_uc_unsync(real_dev, dev); 324 if (dev->flags & IFF_ALLMULTI) 325 dev_set_allmulti(real_dev, -1); 326 if (dev->flags & IFF_PROMISC) 327 dev_set_promiscuity(real_dev, -1); 328 329 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 330 dev_uc_del(real_dev, dev->dev_addr); 331 332 netif_carrier_off(dev); 333 return 0; 334 } 335 336 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 337 { 338 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 339 struct sockaddr *addr = p; 340 int err; 341 342 if (!is_valid_ether_addr(addr->sa_data)) 343 return -EADDRNOTAVAIL; 344 345 if (!(dev->flags & IFF_UP)) 346 goto out; 347 348 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 349 err = dev_uc_add(real_dev, addr->sa_data); 350 if (err < 0) 351 return err; 352 } 353 354 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 355 dev_uc_del(real_dev, dev->dev_addr); 356 357 out: 358 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 359 return 0; 360 } 361 362 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 363 { 364 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 365 const struct net_device_ops *ops = real_dev->netdev_ops; 366 struct ifreq ifrr; 367 int err = -EOPNOTSUPP; 368 369 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 370 ifrr.ifr_ifru = ifr->ifr_ifru; 371 372 switch (cmd) { 373 case SIOCGMIIPHY: 374 case SIOCGMIIREG: 375 case SIOCSMIIREG: 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 defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 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_get_wwn(struct net_device *dev, u64 *wwn, int type) 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 = -EINVAL; 452 453 if (ops->ndo_fcoe_get_wwn) 454 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 455 return rc; 456 } 457 458 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 459 struct scatterlist *sgl, unsigned int sgc) 460 { 461 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 462 const struct net_device_ops *ops = real_dev->netdev_ops; 463 int rc = 0; 464 465 if (ops->ndo_fcoe_ddp_target) 466 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 467 468 return rc; 469 } 470 #endif 471 472 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 473 { 474 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 475 476 if (dev->flags & IFF_UP) { 477 if (change & IFF_ALLMULTI) 478 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 479 if (change & IFF_PROMISC) 480 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 481 } 482 } 483 484 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 485 { 486 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 487 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 488 } 489 490 /* 491 * vlan network devices have devices nesting below it, and are a special 492 * "super class" of normal network devices; split their locks off into a 493 * separate class since they always nest. 494 */ 495 static struct lock_class_key vlan_netdev_xmit_lock_key; 496 static struct lock_class_key vlan_netdev_addr_lock_key; 497 498 static void vlan_dev_set_lockdep_one(struct net_device *dev, 499 struct netdev_queue *txq, 500 void *_subclass) 501 { 502 lockdep_set_class_and_subclass(&txq->_xmit_lock, 503 &vlan_netdev_xmit_lock_key, 504 *(int *)_subclass); 505 } 506 507 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 508 { 509 lockdep_set_class_and_subclass(&dev->addr_list_lock, 510 &vlan_netdev_addr_lock_key, 511 subclass); 512 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 513 } 514 515 static const struct header_ops vlan_header_ops = { 516 .create = vlan_dev_hard_header, 517 .rebuild = vlan_dev_rebuild_header, 518 .parse = eth_header_parse, 519 }; 520 521 static const struct net_device_ops vlan_netdev_ops; 522 523 static int vlan_dev_init(struct net_device *dev) 524 { 525 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 526 int subclass = 0; 527 528 netif_carrier_off(dev); 529 530 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 531 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 532 IFF_MASTER | IFF_SLAVE); 533 dev->iflink = real_dev->ifindex; 534 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 535 (1<<__LINK_STATE_DORMANT))) | 536 (1<<__LINK_STATE_PRESENT); 537 538 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | 539 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | 540 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | 541 NETIF_F_ALL_FCOE; 542 543 dev->features |= real_dev->vlan_features | NETIF_F_LLTX; 544 dev->gso_max_size = real_dev->gso_max_size; 545 546 /* ipv6 shared card related stuff */ 547 dev->dev_id = real_dev->dev_id; 548 549 if (is_zero_ether_addr(dev->dev_addr)) 550 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); 551 if (is_zero_ether_addr(dev->broadcast)) 552 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 553 554 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 555 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 556 #endif 557 558 dev->needed_headroom = real_dev->needed_headroom; 559 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 560 dev->header_ops = real_dev->header_ops; 561 dev->hard_header_len = real_dev->hard_header_len; 562 } else { 563 dev->header_ops = &vlan_header_ops; 564 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 565 } 566 567 dev->netdev_ops = &vlan_netdev_ops; 568 569 if (is_vlan_dev(real_dev)) 570 subclass = 1; 571 572 vlan_dev_set_lockdep_class(dev, subclass); 573 574 vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats); 575 if (!vlan_dev_priv(dev)->vlan_pcpu_stats) 576 return -ENOMEM; 577 578 return 0; 579 } 580 581 static void vlan_dev_uninit(struct net_device *dev) 582 { 583 struct vlan_priority_tci_mapping *pm; 584 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 585 int i; 586 587 free_percpu(vlan->vlan_pcpu_stats); 588 vlan->vlan_pcpu_stats = NULL; 589 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 590 while ((pm = vlan->egress_priority_map[i]) != NULL) { 591 vlan->egress_priority_map[i] = pm->next; 592 kfree(pm); 593 } 594 } 595 } 596 597 static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 598 netdev_features_t features) 599 { 600 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 601 u32 old_features = features; 602 603 features &= real_dev->vlan_features; 604 features |= NETIF_F_RXCSUM; 605 features &= real_dev->features; 606 607 features |= old_features & NETIF_F_SOFT_FEATURES; 608 features |= NETIF_F_LLTX; 609 610 return features; 611 } 612 613 static int vlan_ethtool_get_settings(struct net_device *dev, 614 struct ethtool_cmd *cmd) 615 { 616 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 617 618 return __ethtool_get_settings(vlan->real_dev, cmd); 619 } 620 621 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 622 struct ethtool_drvinfo *info) 623 { 624 strcpy(info->driver, vlan_fullname); 625 strcpy(info->version, vlan_version); 626 strcpy(info->fw_version, "N/A"); 627 } 628 629 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 630 { 631 632 if (vlan_dev_priv(dev)->vlan_pcpu_stats) { 633 struct vlan_pcpu_stats *p; 634 u32 rx_errors = 0, tx_dropped = 0; 635 int i; 636 637 for_each_possible_cpu(i) { 638 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 639 unsigned int start; 640 641 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); 642 do { 643 start = u64_stats_fetch_begin_bh(&p->syncp); 644 rxpackets = p->rx_packets; 645 rxbytes = p->rx_bytes; 646 rxmulticast = p->rx_multicast; 647 txpackets = p->tx_packets; 648 txbytes = p->tx_bytes; 649 } while (u64_stats_fetch_retry_bh(&p->syncp, start)); 650 651 stats->rx_packets += rxpackets; 652 stats->rx_bytes += rxbytes; 653 stats->multicast += rxmulticast; 654 stats->tx_packets += txpackets; 655 stats->tx_bytes += txbytes; 656 /* rx_errors & tx_dropped are u32 */ 657 rx_errors += p->rx_errors; 658 tx_dropped += p->tx_dropped; 659 } 660 stats->rx_errors = rx_errors; 661 stats->tx_dropped = tx_dropped; 662 } 663 return stats; 664 } 665 666 #ifdef CONFIG_NET_POLL_CONTROLLER 667 static void vlan_dev_poll_controller(struct net_device *dev) 668 { 669 return; 670 } 671 672 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) 673 { 674 struct vlan_dev_priv *info = vlan_dev_priv(dev); 675 struct net_device *real_dev = info->real_dev; 676 struct netpoll *netpoll; 677 int err = 0; 678 679 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 680 err = -ENOMEM; 681 if (!netpoll) 682 goto out; 683 684 netpoll->dev = real_dev; 685 strlcpy(netpoll->dev_name, real_dev->name, IFNAMSIZ); 686 687 err = __netpoll_setup(netpoll); 688 if (err) { 689 kfree(netpoll); 690 goto out; 691 } 692 693 info->netpoll = netpoll; 694 695 out: 696 return err; 697 } 698 699 static void vlan_dev_netpoll_cleanup(struct net_device *dev) 700 { 701 struct vlan_dev_priv *info = vlan_dev_priv(dev); 702 struct netpoll *netpoll = info->netpoll; 703 704 if (!netpoll) 705 return; 706 707 info->netpoll = NULL; 708 709 /* Wait for transmitting packets to finish before freeing. */ 710 synchronize_rcu_bh(); 711 712 __netpoll_cleanup(netpoll); 713 kfree(netpoll); 714 } 715 #endif /* CONFIG_NET_POLL_CONTROLLER */ 716 717 static const struct ethtool_ops vlan_ethtool_ops = { 718 .get_settings = vlan_ethtool_get_settings, 719 .get_drvinfo = vlan_ethtool_get_drvinfo, 720 .get_link = ethtool_op_get_link, 721 }; 722 723 static const struct net_device_ops vlan_netdev_ops = { 724 .ndo_change_mtu = vlan_dev_change_mtu, 725 .ndo_init = vlan_dev_init, 726 .ndo_uninit = vlan_dev_uninit, 727 .ndo_open = vlan_dev_open, 728 .ndo_stop = vlan_dev_stop, 729 .ndo_start_xmit = vlan_dev_hard_start_xmit, 730 .ndo_validate_addr = eth_validate_addr, 731 .ndo_set_mac_address = vlan_dev_set_mac_address, 732 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 733 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 734 .ndo_do_ioctl = vlan_dev_ioctl, 735 .ndo_neigh_setup = vlan_dev_neigh_setup, 736 .ndo_get_stats64 = vlan_dev_get_stats64, 737 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 738 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 739 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 740 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 741 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 742 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 743 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 744 #endif 745 #ifdef CONFIG_NET_POLL_CONTROLLER 746 .ndo_poll_controller = vlan_dev_poll_controller, 747 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 748 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 749 #endif 750 .ndo_fix_features = vlan_dev_fix_features, 751 }; 752 753 void vlan_setup(struct net_device *dev) 754 { 755 ether_setup(dev); 756 757 dev->priv_flags |= IFF_802_1Q_VLAN; 758 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 759 dev->tx_queue_len = 0; 760 761 dev->netdev_ops = &vlan_netdev_ops; 762 dev->destructor = free_netdev; 763 dev->ethtool_ops = &vlan_ethtool_ops; 764 765 memset(dev->broadcast, 0, ETH_ALEN); 766 } 767