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/skbuff.h> 25 #include <linux/netdevice.h> 26 #include <linux/etherdevice.h> 27 #include <linux/ethtool.h> 28 #include <net/arp.h> 29 30 #include "vlan.h" 31 #include "vlanproc.h" 32 #include <linux/if_vlan.h> 33 34 /* 35 * Rebuild the Ethernet MAC header. This is called after an ARP 36 * (or in future other address resolution) has completed on this 37 * sk_buff. We now let ARP fill in the other fields. 38 * 39 * This routine CANNOT use cached dst->neigh! 40 * Really, it is used only when dst->neigh is wrong. 41 * 42 * TODO: This needs a checkup, I'm ignorant here. --BLG 43 */ 44 static int vlan_dev_rebuild_header(struct sk_buff *skb) 45 { 46 struct net_device *dev = skb->dev; 47 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 48 49 switch (veth->h_vlan_encapsulated_proto) { 50 #ifdef CONFIG_INET 51 case htons(ETH_P_IP): 52 53 /* TODO: Confirm this will work with VLAN headers... */ 54 return arp_find(veth->h_dest, skb); 55 #endif 56 default: 57 pr_debug("%s: unable to resolve type %X addresses.\n", 58 dev->name, ntohs(veth->h_vlan_encapsulated_proto)); 59 60 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); 61 break; 62 } 63 64 return 0; 65 } 66 67 static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb) 68 { 69 if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) { 70 if (skb_cow(skb, skb_headroom(skb)) < 0) 71 skb = NULL; 72 if (skb) { 73 /* Lifted from Gleb's VLAN code... */ 74 memmove(skb->data - ETH_HLEN, 75 skb->data - VLAN_ETH_HLEN, 12); 76 skb->mac_header += VLAN_HLEN; 77 } 78 } 79 80 return skb; 81 } 82 83 static inline void vlan_set_encap_proto(struct sk_buff *skb, 84 struct vlan_hdr *vhdr) 85 { 86 __be16 proto; 87 unsigned char *rawp; 88 89 /* 90 * Was a VLAN packet, grab the encapsulated protocol, which the layer 91 * three protocols care about. 92 */ 93 94 proto = vhdr->h_vlan_encapsulated_proto; 95 if (ntohs(proto) >= 1536) { 96 skb->protocol = proto; 97 return; 98 } 99 100 rawp = skb->data; 101 if (*(unsigned short *)rawp == 0xFFFF) 102 /* 103 * This is a magic hack to spot IPX packets. Older Novell 104 * breaks the protocol design and runs IPX over 802.3 without 105 * an 802.2 LLC layer. We look for FFFF which isn't a used 106 * 802.2 SSAP/DSAP. This won't work for fault tolerant netware 107 * but does for the rest. 108 */ 109 skb->protocol = htons(ETH_P_802_3); 110 else 111 /* 112 * Real 802.2 LLC 113 */ 114 skb->protocol = htons(ETH_P_802_2); 115 } 116 117 /* 118 * Determine the packet's protocol ID. The rule here is that we 119 * assume 802.3 if the type field is short enough to be a length. 120 * This is normal practice and works for any 'now in use' protocol. 121 * 122 * Also, at this point we assume that we ARE dealing exclusively with 123 * VLAN packets, or packets that should be made into VLAN packets based 124 * on a default VLAN ID. 125 * 126 * NOTE: Should be similar to ethernet/eth.c. 127 * 128 * SANITY NOTE: This method is called when a packet is moving up the stack 129 * towards userland. To get here, it would have already passed 130 * through the ethernet/eth.c eth_type_trans() method. 131 * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be 132 * stored UNALIGNED in the memory. RISC systems don't like 133 * such cases very much... 134 * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be 135 * aligned, so there doesn't need to be any of the unaligned 136 * stuff. It has been commented out now... --Ben 137 * 138 */ 139 int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, 140 struct packet_type *ptype, struct net_device *orig_dev) 141 { 142 struct vlan_hdr *vhdr; 143 struct net_device_stats *stats; 144 u16 vlan_id; 145 u16 vlan_tci; 146 147 skb = skb_share_check(skb, GFP_ATOMIC); 148 if (skb == NULL) 149 goto err_free; 150 151 if (unlikely(!pskb_may_pull(skb, VLAN_HLEN))) 152 goto err_free; 153 154 vhdr = (struct vlan_hdr *)skb->data; 155 vlan_tci = ntohs(vhdr->h_vlan_TCI); 156 vlan_id = vlan_tci & VLAN_VID_MASK; 157 158 rcu_read_lock(); 159 skb->dev = __find_vlan_dev(dev, vlan_id); 160 if (!skb->dev) { 161 pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n", 162 __func__, vlan_id, dev->name); 163 goto err_unlock; 164 } 165 166 stats = &skb->dev->stats; 167 stats->rx_packets++; 168 stats->rx_bytes += skb->len; 169 170 skb_pull_rcsum(skb, VLAN_HLEN); 171 172 skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci); 173 174 pr_debug("%s: priority: %u for TCI: %hu\n", 175 __func__, skb->priority, vlan_tci); 176 177 switch (skb->pkt_type) { 178 case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ 179 /* stats->broadcast ++; // no such counter :-( */ 180 break; 181 182 case PACKET_MULTICAST: 183 stats->multicast++; 184 break; 185 186 case PACKET_OTHERHOST: 187 /* Our lower layer thinks this is not local, let's make sure. 188 * This allows the VLAN to have a different MAC than the 189 * underlying device, and still route correctly. 190 */ 191 if (!compare_ether_addr(eth_hdr(skb)->h_dest, 192 skb->dev->dev_addr)) 193 skb->pkt_type = PACKET_HOST; 194 break; 195 default: 196 break; 197 } 198 199 vlan_set_encap_proto(skb, vhdr); 200 201 skb = vlan_check_reorder_header(skb); 202 if (!skb) { 203 stats->rx_errors++; 204 goto err_unlock; 205 } 206 207 netif_rx(skb); 208 rcu_read_unlock(); 209 return NET_RX_SUCCESS; 210 211 err_unlock: 212 rcu_read_unlock(); 213 err_free: 214 kfree_skb(skb); 215 return NET_RX_DROP; 216 } 217 218 static inline u16 219 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) 220 { 221 struct vlan_priority_tci_mapping *mp; 222 223 mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; 224 while (mp) { 225 if (mp->priority == skb->priority) { 226 return mp->vlan_qos; /* This should already be shifted 227 * to mask correctly with the 228 * VLAN's TCI */ 229 } 230 mp = mp->next; 231 } 232 return 0; 233 } 234 235 /* 236 * Create the VLAN header for an arbitrary protocol layer 237 * 238 * saddr=NULL means use device source address 239 * daddr=NULL means leave destination address (eg unresolved arp) 240 * 241 * This is called when the SKB is moving down the stack towards the 242 * physical devices. 243 */ 244 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 245 unsigned short type, 246 const void *daddr, const void *saddr, 247 unsigned int len) 248 { 249 struct vlan_hdr *vhdr; 250 unsigned int vhdrlen = 0; 251 u16 vlan_tci = 0; 252 int rc; 253 254 if (WARN_ON(skb_headroom(skb) < dev->hard_header_len)) 255 return -ENOSPC; 256 257 if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) { 258 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 259 260 vlan_tci = vlan_dev_info(dev)->vlan_id; 261 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 262 vhdr->h_vlan_TCI = htons(vlan_tci); 263 264 /* 265 * Set the protocol type. For a packet of type ETH_P_802_3 we 266 * put the length in here instead. It is up to the 802.2 267 * layer to carry protocol information. 268 */ 269 if (type != ETH_P_802_3) 270 vhdr->h_vlan_encapsulated_proto = htons(type); 271 else 272 vhdr->h_vlan_encapsulated_proto = htons(len); 273 274 skb->protocol = htons(ETH_P_8021Q); 275 type = ETH_P_8021Q; 276 vhdrlen = VLAN_HLEN; 277 } 278 279 /* Before delegating work to the lower layer, enter our MAC-address */ 280 if (saddr == NULL) 281 saddr = dev->dev_addr; 282 283 /* Now make the underlying real hard header */ 284 dev = vlan_dev_info(dev)->real_dev; 285 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 286 if (rc > 0) 287 rc += vhdrlen; 288 return rc; 289 } 290 291 static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 292 { 293 struct net_device_stats *stats = &dev->stats; 294 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 295 296 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 297 * 298 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 299 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 300 */ 301 if (veth->h_vlan_proto != htons(ETH_P_8021Q) || 302 vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { 303 unsigned int orig_headroom = skb_headroom(skb); 304 u16 vlan_tci; 305 306 vlan_dev_info(dev)->cnt_encap_on_xmit++; 307 308 vlan_tci = vlan_dev_info(dev)->vlan_id; 309 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 310 skb = __vlan_put_tag(skb, vlan_tci); 311 if (!skb) { 312 stats->tx_dropped++; 313 return NETDEV_TX_OK; 314 } 315 316 if (orig_headroom < VLAN_HLEN) 317 vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; 318 } 319 320 stats->tx_packets++; 321 stats->tx_bytes += skb->len; 322 323 skb->dev = vlan_dev_info(dev)->real_dev; 324 dev_queue_xmit(skb); 325 return NETDEV_TX_OK; 326 } 327 328 static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, 329 struct net_device *dev) 330 { 331 struct net_device_stats *stats = &dev->stats; 332 u16 vlan_tci; 333 334 vlan_tci = vlan_dev_info(dev)->vlan_id; 335 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 336 skb = __vlan_hwaccel_put_tag(skb, vlan_tci); 337 338 stats->tx_packets++; 339 stats->tx_bytes += skb->len; 340 341 skb->dev = vlan_dev_info(dev)->real_dev; 342 dev_queue_xmit(skb); 343 return NETDEV_TX_OK; 344 } 345 346 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 347 { 348 /* TODO: gotta make sure the underlying layer can handle it, 349 * maybe an IFF_VLAN_CAPABLE flag for devices? 350 */ 351 if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) 352 return -ERANGE; 353 354 dev->mtu = new_mtu; 355 356 return 0; 357 } 358 359 void vlan_dev_set_ingress_priority(const struct net_device *dev, 360 u32 skb_prio, u16 vlan_prio) 361 { 362 struct vlan_dev_info *vlan = vlan_dev_info(dev); 363 364 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 365 vlan->nr_ingress_mappings--; 366 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 367 vlan->nr_ingress_mappings++; 368 369 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 370 } 371 372 int vlan_dev_set_egress_priority(const struct net_device *dev, 373 u32 skb_prio, u16 vlan_prio) 374 { 375 struct vlan_dev_info *vlan = vlan_dev_info(dev); 376 struct vlan_priority_tci_mapping *mp = NULL; 377 struct vlan_priority_tci_mapping *np; 378 u32 vlan_qos = (vlan_prio << 13) & 0xE000; 379 380 /* See if a priority mapping exists.. */ 381 mp = vlan->egress_priority_map[skb_prio & 0xF]; 382 while (mp) { 383 if (mp->priority == skb_prio) { 384 if (mp->vlan_qos && !vlan_qos) 385 vlan->nr_egress_mappings--; 386 else if (!mp->vlan_qos && vlan_qos) 387 vlan->nr_egress_mappings++; 388 mp->vlan_qos = vlan_qos; 389 return 0; 390 } 391 mp = mp->next; 392 } 393 394 /* Create a new mapping then. */ 395 mp = vlan->egress_priority_map[skb_prio & 0xF]; 396 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 397 if (!np) 398 return -ENOBUFS; 399 400 np->next = mp; 401 np->priority = skb_prio; 402 np->vlan_qos = vlan_qos; 403 vlan->egress_priority_map[skb_prio & 0xF] = np; 404 if (vlan_qos) 405 vlan->nr_egress_mappings++; 406 return 0; 407 } 408 409 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 410 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 411 { 412 struct vlan_dev_info *vlan = vlan_dev_info(dev); 413 u32 old_flags = vlan->flags; 414 415 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP)) 416 return -EINVAL; 417 418 vlan->flags = (old_flags & ~mask) | (flags & mask); 419 420 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 421 if (vlan->flags & VLAN_FLAG_GVRP) 422 vlan_gvrp_request_join(dev); 423 else 424 vlan_gvrp_request_leave(dev); 425 } 426 return 0; 427 } 428 429 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 430 { 431 strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); 432 } 433 434 static int vlan_dev_open(struct net_device *dev) 435 { 436 struct vlan_dev_info *vlan = vlan_dev_info(dev); 437 struct net_device *real_dev = vlan->real_dev; 438 int err; 439 440 if (!(real_dev->flags & IFF_UP)) 441 return -ENETDOWN; 442 443 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { 444 err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); 445 if (err < 0) 446 goto out; 447 } 448 449 if (dev->flags & IFF_ALLMULTI) { 450 err = dev_set_allmulti(real_dev, 1); 451 if (err < 0) 452 goto del_unicast; 453 } 454 if (dev->flags & IFF_PROMISC) { 455 err = dev_set_promiscuity(real_dev, 1); 456 if (err < 0) 457 goto clear_allmulti; 458 } 459 460 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 461 462 if (vlan->flags & VLAN_FLAG_GVRP) 463 vlan_gvrp_request_join(dev); 464 465 netif_carrier_on(dev); 466 return 0; 467 468 clear_allmulti: 469 if (dev->flags & IFF_ALLMULTI) 470 dev_set_allmulti(real_dev, -1); 471 del_unicast: 472 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 473 dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); 474 out: 475 netif_carrier_off(dev); 476 return err; 477 } 478 479 static int vlan_dev_stop(struct net_device *dev) 480 { 481 struct vlan_dev_info *vlan = vlan_dev_info(dev); 482 struct net_device *real_dev = vlan->real_dev; 483 484 if (vlan->flags & VLAN_FLAG_GVRP) 485 vlan_gvrp_request_leave(dev); 486 487 dev_mc_unsync(real_dev, dev); 488 dev_unicast_unsync(real_dev, dev); 489 if (dev->flags & IFF_ALLMULTI) 490 dev_set_allmulti(real_dev, -1); 491 if (dev->flags & IFF_PROMISC) 492 dev_set_promiscuity(real_dev, -1); 493 494 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 495 dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len); 496 497 netif_carrier_off(dev); 498 return 0; 499 } 500 501 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 502 { 503 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 504 struct sockaddr *addr = p; 505 int err; 506 507 if (!is_valid_ether_addr(addr->sa_data)) 508 return -EADDRNOTAVAIL; 509 510 if (!(dev->flags & IFF_UP)) 511 goto out; 512 513 if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { 514 err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN); 515 if (err < 0) 516 return err; 517 } 518 519 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 520 dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); 521 522 out: 523 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 524 return 0; 525 } 526 527 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 528 { 529 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 530 const struct net_device_ops *ops = real_dev->netdev_ops; 531 struct ifreq ifrr; 532 int err = -EOPNOTSUPP; 533 534 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 535 ifrr.ifr_ifru = ifr->ifr_ifru; 536 537 switch (cmd) { 538 case SIOCGMIIPHY: 539 case SIOCGMIIREG: 540 case SIOCSMIIREG: 541 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 542 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 543 break; 544 } 545 546 if (!err) 547 ifr->ifr_ifru = ifrr.ifr_ifru; 548 549 return err; 550 } 551 552 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 553 { 554 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 555 const struct net_device_ops *ops = real_dev->netdev_ops; 556 int err = 0; 557 558 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 559 err = ops->ndo_neigh_setup(real_dev, pa); 560 561 return err; 562 } 563 564 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 565 { 566 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 567 568 if (change & IFF_ALLMULTI) 569 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 570 if (change & IFF_PROMISC) 571 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 572 } 573 574 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 575 { 576 dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 577 dev_unicast_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 578 } 579 580 /* 581 * vlan network devices have devices nesting below it, and are a special 582 * "super class" of normal network devices; split their locks off into a 583 * separate class since they always nest. 584 */ 585 static struct lock_class_key vlan_netdev_xmit_lock_key; 586 static struct lock_class_key vlan_netdev_addr_lock_key; 587 588 static void vlan_dev_set_lockdep_one(struct net_device *dev, 589 struct netdev_queue *txq, 590 void *_subclass) 591 { 592 lockdep_set_class_and_subclass(&txq->_xmit_lock, 593 &vlan_netdev_xmit_lock_key, 594 *(int *)_subclass); 595 } 596 597 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 598 { 599 lockdep_set_class_and_subclass(&dev->addr_list_lock, 600 &vlan_netdev_addr_lock_key, 601 subclass); 602 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 603 } 604 605 static const struct header_ops vlan_header_ops = { 606 .create = vlan_dev_hard_header, 607 .rebuild = vlan_dev_rebuild_header, 608 .parse = eth_header_parse, 609 }; 610 611 static const struct net_device_ops vlan_netdev_ops, vlan_netdev_accel_ops; 612 613 static int vlan_dev_init(struct net_device *dev) 614 { 615 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 616 int subclass = 0; 617 618 netif_carrier_off(dev); 619 620 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 621 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI); 622 dev->iflink = real_dev->ifindex; 623 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 624 (1<<__LINK_STATE_DORMANT))) | 625 (1<<__LINK_STATE_PRESENT); 626 627 dev->features |= real_dev->features & real_dev->vlan_features; 628 dev->gso_max_size = real_dev->gso_max_size; 629 630 /* ipv6 shared card related stuff */ 631 dev->dev_id = real_dev->dev_id; 632 633 if (is_zero_ether_addr(dev->dev_addr)) 634 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); 635 if (is_zero_ether_addr(dev->broadcast)) 636 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 637 638 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 639 dev->header_ops = real_dev->header_ops; 640 dev->hard_header_len = real_dev->hard_header_len; 641 dev->netdev_ops = &vlan_netdev_accel_ops; 642 } else { 643 dev->header_ops = &vlan_header_ops; 644 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 645 dev->netdev_ops = &vlan_netdev_ops; 646 } 647 netdev_resync_ops(dev); 648 649 if (is_vlan_dev(real_dev)) 650 subclass = 1; 651 652 vlan_dev_set_lockdep_class(dev, subclass); 653 return 0; 654 } 655 656 static void vlan_dev_uninit(struct net_device *dev) 657 { 658 struct vlan_priority_tci_mapping *pm; 659 struct vlan_dev_info *vlan = vlan_dev_info(dev); 660 int i; 661 662 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 663 while ((pm = vlan->egress_priority_map[i]) != NULL) { 664 vlan->egress_priority_map[i] = pm->next; 665 kfree(pm); 666 } 667 } 668 } 669 670 static int vlan_ethtool_get_settings(struct net_device *dev, 671 struct ethtool_cmd *cmd) 672 { 673 const struct vlan_dev_info *vlan = vlan_dev_info(dev); 674 struct net_device *real_dev = vlan->real_dev; 675 676 if (!real_dev->ethtool_ops || 677 !real_dev->ethtool_ops->get_settings) 678 return -EOPNOTSUPP; 679 680 return real_dev->ethtool_ops->get_settings(real_dev, cmd); 681 } 682 683 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 684 struct ethtool_drvinfo *info) 685 { 686 strcpy(info->driver, vlan_fullname); 687 strcpy(info->version, vlan_version); 688 strcpy(info->fw_version, "N/A"); 689 } 690 691 static u32 vlan_ethtool_get_rx_csum(struct net_device *dev) 692 { 693 const struct vlan_dev_info *vlan = vlan_dev_info(dev); 694 struct net_device *real_dev = vlan->real_dev; 695 696 if (real_dev->ethtool_ops == NULL || 697 real_dev->ethtool_ops->get_rx_csum == NULL) 698 return 0; 699 return real_dev->ethtool_ops->get_rx_csum(real_dev); 700 } 701 702 static u32 vlan_ethtool_get_flags(struct net_device *dev) 703 { 704 const struct vlan_dev_info *vlan = vlan_dev_info(dev); 705 struct net_device *real_dev = vlan->real_dev; 706 707 if (!(real_dev->features & NETIF_F_HW_VLAN_RX) || 708 real_dev->ethtool_ops == NULL || 709 real_dev->ethtool_ops->get_flags == NULL) 710 return 0; 711 return real_dev->ethtool_ops->get_flags(real_dev); 712 } 713 714 static const struct ethtool_ops vlan_ethtool_ops = { 715 .get_settings = vlan_ethtool_get_settings, 716 .get_drvinfo = vlan_ethtool_get_drvinfo, 717 .get_link = ethtool_op_get_link, 718 .get_rx_csum = vlan_ethtool_get_rx_csum, 719 .get_flags = vlan_ethtool_get_flags, 720 }; 721 722 static const struct net_device_ops vlan_netdev_ops = { 723 .ndo_change_mtu = vlan_dev_change_mtu, 724 .ndo_init = vlan_dev_init, 725 .ndo_uninit = vlan_dev_uninit, 726 .ndo_open = vlan_dev_open, 727 .ndo_stop = vlan_dev_stop, 728 .ndo_start_xmit = vlan_dev_hard_start_xmit, 729 .ndo_validate_addr = eth_validate_addr, 730 .ndo_set_mac_address = vlan_dev_set_mac_address, 731 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 732 .ndo_set_multicast_list = 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 }; 737 738 static const struct net_device_ops vlan_netdev_accel_ops = { 739 .ndo_change_mtu = vlan_dev_change_mtu, 740 .ndo_init = vlan_dev_init, 741 .ndo_uninit = vlan_dev_uninit, 742 .ndo_open = vlan_dev_open, 743 .ndo_stop = vlan_dev_stop, 744 .ndo_start_xmit = vlan_dev_hwaccel_hard_start_xmit, 745 .ndo_validate_addr = eth_validate_addr, 746 .ndo_set_mac_address = vlan_dev_set_mac_address, 747 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 748 .ndo_set_multicast_list = vlan_dev_set_rx_mode, 749 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 750 .ndo_do_ioctl = vlan_dev_ioctl, 751 .ndo_neigh_setup = vlan_dev_neigh_setup, 752 }; 753 754 void vlan_setup(struct net_device *dev) 755 { 756 ether_setup(dev); 757 758 dev->priv_flags |= IFF_802_1Q_VLAN; 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