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: vlan@scry.wanfear.com 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/mm.h> 25 #include <linux/in.h> 26 #include <linux/init.h> 27 #include <asm/uaccess.h> /* for copy_from_user */ 28 #include <linux/skbuff.h> 29 #include <linux/netdevice.h> 30 #include <linux/etherdevice.h> 31 #include <net/datalink.h> 32 #include <net/p8022.h> 33 #include <net/arp.h> 34 35 #include "vlan.h" 36 #include "vlanproc.h" 37 #include <linux/if_vlan.h> 38 #include <net/ip.h> 39 40 /* 41 * Rebuild the Ethernet MAC header. This is called after an ARP 42 * (or in future other address resolution) has completed on this 43 * sk_buff. We now let ARP fill in the other fields. 44 * 45 * This routine CANNOT use cached dst->neigh! 46 * Really, it is used only when dst->neigh is wrong. 47 * 48 * TODO: This needs a checkup, I'm ignorant here. --BLG 49 */ 50 int vlan_dev_rebuild_header(struct sk_buff *skb) 51 { 52 struct net_device *dev = skb->dev; 53 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 54 55 switch (veth->h_vlan_encapsulated_proto) { 56 #ifdef CONFIG_INET 57 case __constant_htons(ETH_P_IP): 58 59 /* TODO: Confirm this will work with VLAN headers... */ 60 return arp_find(veth->h_dest, skb); 61 #endif 62 default: 63 printk(VLAN_DBG 64 "%s: unable to resolve type %X addresses.\n", 65 dev->name, ntohs(veth->h_vlan_encapsulated_proto)); 66 67 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); 68 break; 69 } 70 71 return 0; 72 } 73 74 static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb) 75 { 76 if (VLAN_DEV_INFO(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) { 77 if (skb_shared(skb) || skb_cloned(skb)) { 78 struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC); 79 kfree_skb(skb); 80 skb = nskb; 81 } 82 if (skb) { 83 /* Lifted from Gleb's VLAN code... */ 84 memmove(skb->data - ETH_HLEN, 85 skb->data - VLAN_ETH_HLEN, 12); 86 skb->mac_header += VLAN_HLEN; 87 } 88 } 89 90 return skb; 91 } 92 93 /* 94 * Determine the packet's protocol ID. The rule here is that we 95 * assume 802.3 if the type field is short enough to be a length. 96 * This is normal practice and works for any 'now in use' protocol. 97 * 98 * Also, at this point we assume that we ARE dealing exclusively with 99 * VLAN packets, or packets that should be made into VLAN packets based 100 * on a default VLAN ID. 101 * 102 * NOTE: Should be similar to ethernet/eth.c. 103 * 104 * SANITY NOTE: This method is called when a packet is moving up the stack 105 * towards userland. To get here, it would have already passed 106 * through the ethernet/eth.c eth_type_trans() method. 107 * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be 108 * stored UNALIGNED in the memory. RISC systems don't like 109 * such cases very much... 110 * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be aligned, 111 * so there doesn't need to be any of the unaligned stuff. It has 112 * been commented out now... --Ben 113 * 114 */ 115 int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, 116 struct packet_type* ptype, struct net_device *orig_dev) 117 { 118 unsigned char *rawp = NULL; 119 struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data); 120 unsigned short vid; 121 struct net_device_stats *stats; 122 unsigned short vlan_TCI; 123 __be16 proto; 124 125 /* vlan_TCI = ntohs(get_unaligned(&vhdr->h_vlan_TCI)); */ 126 vlan_TCI = ntohs(vhdr->h_vlan_TCI); 127 128 vid = (vlan_TCI & VLAN_VID_MASK); 129 130 #ifdef VLAN_DEBUG 131 printk(VLAN_DBG "%s: skb: %p vlan_id: %hx\n", 132 __FUNCTION__, skb, vid); 133 #endif 134 135 /* Ok, we will find the correct VLAN device, strip the header, 136 * and then go on as usual. 137 */ 138 139 /* We have 12 bits of vlan ID. 140 * 141 * We must not drop allow preempt until we hold a 142 * reference to the device (netif_rx does that) or we 143 * fail. 144 */ 145 146 rcu_read_lock(); 147 skb->dev = __find_vlan_dev(dev, vid); 148 if (!skb->dev) { 149 rcu_read_unlock(); 150 151 #ifdef VLAN_DEBUG 152 printk(VLAN_DBG "%s: ERROR: No net_device for VID: %i on dev: %s [%i]\n", 153 __FUNCTION__, (unsigned int)(vid), dev->name, dev->ifindex); 154 #endif 155 kfree_skb(skb); 156 return -1; 157 } 158 159 skb->dev->last_rx = jiffies; 160 161 /* Bump the rx counters for the VLAN device. */ 162 stats = vlan_dev_get_stats(skb->dev); 163 stats->rx_packets++; 164 stats->rx_bytes += skb->len; 165 166 /* Take off the VLAN header (4 bytes currently) */ 167 skb_pull_rcsum(skb, VLAN_HLEN); 168 169 /* Ok, lets check to make sure the device (dev) we 170 * came in on is what this VLAN is attached to. 171 */ 172 173 if (dev != VLAN_DEV_INFO(skb->dev)->real_dev) { 174 rcu_read_unlock(); 175 176 #ifdef VLAN_DEBUG 177 printk(VLAN_DBG "%s: dropping skb: %p because came in on wrong device, dev: %s real_dev: %s, skb_dev: %s\n", 178 __FUNCTION__, skb, dev->name, 179 VLAN_DEV_INFO(skb->dev)->real_dev->name, 180 skb->dev->name); 181 #endif 182 kfree_skb(skb); 183 stats->rx_errors++; 184 return -1; 185 } 186 187 /* 188 * Deal with ingress priority mapping. 189 */ 190 skb->priority = vlan_get_ingress_priority(skb->dev, ntohs(vhdr->h_vlan_TCI)); 191 192 #ifdef VLAN_DEBUG 193 printk(VLAN_DBG "%s: priority: %lu for TCI: %hu (hbo)\n", 194 __FUNCTION__, (unsigned long)(skb->priority), 195 ntohs(vhdr->h_vlan_TCI)); 196 #endif 197 198 /* The ethernet driver already did the pkt_type calculations 199 * for us... 200 */ 201 switch (skb->pkt_type) { 202 case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ 203 // stats->broadcast ++; // no such counter :-( 204 break; 205 206 case PACKET_MULTICAST: 207 stats->multicast++; 208 break; 209 210 case PACKET_OTHERHOST: 211 /* Our lower layer thinks this is not local, let's make sure. 212 * This allows the VLAN to have a different MAC than the underlying 213 * device, and still route correctly. 214 */ 215 if (!compare_ether_addr(eth_hdr(skb)->h_dest, skb->dev->dev_addr)) { 216 /* It is for our (changed) MAC-address! */ 217 skb->pkt_type = PACKET_HOST; 218 } 219 break; 220 default: 221 break; 222 } 223 224 /* Was a VLAN packet, grab the encapsulated protocol, which the layer 225 * three protocols care about. 226 */ 227 /* proto = get_unaligned(&vhdr->h_vlan_encapsulated_proto); */ 228 proto = vhdr->h_vlan_encapsulated_proto; 229 230 skb->protocol = proto; 231 if (ntohs(proto) >= 1536) { 232 /* place it back on the queue to be handled by 233 * true layer 3 protocols. 234 */ 235 236 /* See if we are configured to re-write the VLAN header 237 * to make it look like ethernet... 238 */ 239 skb = vlan_check_reorder_header(skb); 240 241 /* Can be null if skb-clone fails when re-ordering */ 242 if (skb) { 243 netif_rx(skb); 244 } else { 245 /* TODO: Add a more specific counter here. */ 246 stats->rx_errors++; 247 } 248 rcu_read_unlock(); 249 return 0; 250 } 251 252 rawp = skb->data; 253 254 /* 255 * This is a magic hack to spot IPX packets. Older Novell breaks 256 * the protocol design and runs IPX over 802.3 without an 802.2 LLC 257 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This 258 * won't work for fault tolerant netware but does for the rest. 259 */ 260 if (*(unsigned short *)rawp == 0xFFFF) { 261 skb->protocol = htons(ETH_P_802_3); 262 /* place it back on the queue to be handled by true layer 3 protocols. 263 */ 264 265 /* See if we are configured to re-write the VLAN header 266 * to make it look like ethernet... 267 */ 268 skb = vlan_check_reorder_header(skb); 269 270 /* Can be null if skb-clone fails when re-ordering */ 271 if (skb) { 272 netif_rx(skb); 273 } else { 274 /* TODO: Add a more specific counter here. */ 275 stats->rx_errors++; 276 } 277 rcu_read_unlock(); 278 return 0; 279 } 280 281 /* 282 * Real 802.2 LLC 283 */ 284 skb->protocol = htons(ETH_P_802_2); 285 /* place it back on the queue to be handled by upper layer protocols. 286 */ 287 288 /* See if we are configured to re-write the VLAN header 289 * to make it look like ethernet... 290 */ 291 skb = vlan_check_reorder_header(skb); 292 293 /* Can be null if skb-clone fails when re-ordering */ 294 if (skb) { 295 netif_rx(skb); 296 } else { 297 /* TODO: Add a more specific counter here. */ 298 stats->rx_errors++; 299 } 300 rcu_read_unlock(); 301 return 0; 302 } 303 304 static inline unsigned short vlan_dev_get_egress_qos_mask(struct net_device* dev, 305 struct sk_buff* skb) 306 { 307 struct vlan_priority_tci_mapping *mp = 308 VLAN_DEV_INFO(dev)->egress_priority_map[(skb->priority & 0xF)]; 309 310 while (mp) { 311 if (mp->priority == skb->priority) { 312 return mp->vlan_qos; /* This should already be shifted to mask 313 * correctly with the VLAN's TCI 314 */ 315 } 316 mp = mp->next; 317 } 318 return 0; 319 } 320 321 /* 322 * Create the VLAN header for an arbitrary protocol layer 323 * 324 * saddr=NULL means use device source address 325 * daddr=NULL means leave destination address (eg unresolved arp) 326 * 327 * This is called when the SKB is moving down the stack towards the 328 * physical devices. 329 */ 330 int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 331 unsigned short type, void *daddr, void *saddr, 332 unsigned len) 333 { 334 struct vlan_hdr *vhdr; 335 unsigned short veth_TCI = 0; 336 int rc = 0; 337 int build_vlan_header = 0; 338 struct net_device *vdev = dev; /* save this for the bottom of the method */ 339 340 #ifdef VLAN_DEBUG 341 printk(VLAN_DBG "%s: skb: %p type: %hx len: %x vlan_id: %hx, daddr: %p\n", 342 __FUNCTION__, skb, type, len, VLAN_DEV_INFO(dev)->vlan_id, daddr); 343 #endif 344 345 /* build vlan header only if re_order_header flag is NOT set. This 346 * fixes some programs that get confused when they see a VLAN device 347 * sending a frame that is VLAN encoded (the consensus is that the VLAN 348 * device should look completely like an Ethernet device when the 349 * REORDER_HEADER flag is set) The drawback to this is some extra 350 * header shuffling in the hard_start_xmit. Users can turn off this 351 * REORDER behaviour with the vconfig tool. 352 */ 353 if (!(VLAN_DEV_INFO(dev)->flags & VLAN_FLAG_REORDER_HDR)) 354 build_vlan_header = 1; 355 356 if (build_vlan_header) { 357 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 358 359 /* build the four bytes that make this a VLAN header. */ 360 361 /* Now, construct the second two bytes. This field looks something 362 * like: 363 * usr_priority: 3 bits (high bits) 364 * CFI 1 bit 365 * VLAN ID 12 bits (low bits) 366 * 367 */ 368 veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; 369 veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 370 371 vhdr->h_vlan_TCI = htons(veth_TCI); 372 373 /* 374 * Set the protocol type. 375 * For a packet of type ETH_P_802_3 we put the length in here instead. 376 * It is up to the 802.2 layer to carry protocol information. 377 */ 378 379 if (type != ETH_P_802_3) { 380 vhdr->h_vlan_encapsulated_proto = htons(type); 381 } else { 382 vhdr->h_vlan_encapsulated_proto = htons(len); 383 } 384 385 skb->protocol = htons(ETH_P_8021Q); 386 skb_reset_network_header(skb); 387 } 388 389 /* Before delegating work to the lower layer, enter our MAC-address */ 390 if (saddr == NULL) 391 saddr = dev->dev_addr; 392 393 dev = VLAN_DEV_INFO(dev)->real_dev; 394 395 /* MPLS can send us skbuffs w/out enough space. This check will grow the 396 * skb if it doesn't have enough headroom. Not a beautiful solution, so 397 * I'll tick a counter so that users can know it's happening... If they 398 * care... 399 */ 400 401 /* NOTE: This may still break if the underlying device is not the final 402 * device (and thus there are more headers to add...) It should work for 403 * good-ole-ethernet though. 404 */ 405 if (skb_headroom(skb) < dev->hard_header_len) { 406 struct sk_buff *sk_tmp = skb; 407 skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len); 408 kfree_skb(sk_tmp); 409 if (skb == NULL) { 410 struct net_device_stats *stats = vlan_dev_get_stats(vdev); 411 stats->tx_dropped++; 412 return -ENOMEM; 413 } 414 VLAN_DEV_INFO(vdev)->cnt_inc_headroom_on_tx++; 415 #ifdef VLAN_DEBUG 416 printk(VLAN_DBG "%s: %s: had to grow skb.\n", __FUNCTION__, vdev->name); 417 #endif 418 } 419 420 if (build_vlan_header) { 421 /* Now make the underlying real hard header */ 422 rc = dev->hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, len + VLAN_HLEN); 423 424 if (rc > 0) { 425 rc += VLAN_HLEN; 426 } else if (rc < 0) { 427 rc -= VLAN_HLEN; 428 } 429 } else { 430 /* If here, then we'll just make a normal looking ethernet frame, 431 * but, the hard_start_xmit method will insert the tag (it has to 432 * be able to do this for bridged and other skbs that don't come 433 * down the protocol stack in an orderly manner. 434 */ 435 rc = dev->hard_header(skb, dev, type, daddr, saddr, len); 436 } 437 438 return rc; 439 } 440 441 int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 442 { 443 struct net_device_stats *stats = vlan_dev_get_stats(dev); 444 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 445 446 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 447 * 448 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 449 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 450 */ 451 452 if (veth->h_vlan_proto != htons(ETH_P_8021Q)) { 453 int orig_headroom = skb_headroom(skb); 454 unsigned short veth_TCI; 455 456 /* This is not a VLAN frame...but we can fix that! */ 457 VLAN_DEV_INFO(dev)->cnt_encap_on_xmit++; 458 459 #ifdef VLAN_DEBUG 460 printk(VLAN_DBG "%s: proto to encap: 0x%hx (hbo)\n", 461 __FUNCTION__, htons(veth->h_vlan_proto)); 462 #endif 463 /* Construct the second two bytes. This field looks something 464 * like: 465 * usr_priority: 3 bits (high bits) 466 * CFI 1 bit 467 * VLAN ID 12 bits (low bits) 468 */ 469 veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; 470 veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 471 472 skb = __vlan_put_tag(skb, veth_TCI); 473 if (!skb) { 474 stats->tx_dropped++; 475 return 0; 476 } 477 478 if (orig_headroom < VLAN_HLEN) { 479 VLAN_DEV_INFO(dev)->cnt_inc_headroom_on_tx++; 480 } 481 } 482 483 #ifdef VLAN_DEBUG 484 printk(VLAN_DBG "%s: about to send skb: %p to dev: %s\n", 485 __FUNCTION__, skb, skb->dev->name); 486 printk(VLAN_DBG " %2hx.%2hx.%2hx.%2xh.%2hx.%2hx %2hx.%2hx.%2hx.%2hx.%2hx.%2hx %4hx %4hx %4hx\n", 487 veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], veth->h_dest[3], veth->h_dest[4], veth->h_dest[5], 488 veth->h_source[0], veth->h_source[1], veth->h_source[2], veth->h_source[3], veth->h_source[4], veth->h_source[5], 489 veth->h_vlan_proto, veth->h_vlan_TCI, veth->h_vlan_encapsulated_proto); 490 #endif 491 492 stats->tx_packets++; /* for statics only */ 493 stats->tx_bytes += skb->len; 494 495 skb->dev = VLAN_DEV_INFO(dev)->real_dev; 496 dev_queue_xmit(skb); 497 498 return 0; 499 } 500 501 int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 502 { 503 struct net_device_stats *stats = vlan_dev_get_stats(dev); 504 unsigned short veth_TCI; 505 506 /* Construct the second two bytes. This field looks something 507 * like: 508 * usr_priority: 3 bits (high bits) 509 * CFI 1 bit 510 * VLAN ID 12 bits (low bits) 511 */ 512 veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; 513 veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 514 skb = __vlan_hwaccel_put_tag(skb, veth_TCI); 515 516 stats->tx_packets++; 517 stats->tx_bytes += skb->len; 518 519 skb->dev = VLAN_DEV_INFO(dev)->real_dev; 520 dev_queue_xmit(skb); 521 522 return 0; 523 } 524 525 int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 526 { 527 /* TODO: gotta make sure the underlying layer can handle it, 528 * maybe an IFF_VLAN_CAPABLE flag for devices? 529 */ 530 if (VLAN_DEV_INFO(dev)->real_dev->mtu < new_mtu) 531 return -ERANGE; 532 533 dev->mtu = new_mtu; 534 535 return 0; 536 } 537 538 void vlan_dev_set_ingress_priority(const struct net_device *dev, 539 u32 skb_prio, short vlan_prio) 540 { 541 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); 542 543 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 544 vlan->nr_ingress_mappings--; 545 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 546 vlan->nr_ingress_mappings++; 547 548 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 549 } 550 551 int vlan_dev_set_egress_priority(const struct net_device *dev, 552 u32 skb_prio, short vlan_prio) 553 { 554 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); 555 struct vlan_priority_tci_mapping *mp = NULL; 556 struct vlan_priority_tci_mapping *np; 557 u32 vlan_qos = (vlan_prio << 13) & 0xE000; 558 559 /* See if a priority mapping exists.. */ 560 mp = vlan->egress_priority_map[skb_prio & 0xF]; 561 while (mp) { 562 if (mp->priority == skb_prio) { 563 if (mp->vlan_qos && !vlan_qos) 564 vlan->nr_egress_mappings--; 565 else if (!mp->vlan_qos && vlan_qos) 566 vlan->nr_egress_mappings++; 567 mp->vlan_qos = vlan_qos; 568 return 0; 569 } 570 mp = mp->next; 571 } 572 573 /* Create a new mapping then. */ 574 mp = vlan->egress_priority_map[skb_prio & 0xF]; 575 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 576 if (!np) 577 return -ENOBUFS; 578 579 np->next = mp; 580 np->priority = skb_prio; 581 np->vlan_qos = vlan_qos; 582 vlan->egress_priority_map[skb_prio & 0xF] = np; 583 if (vlan_qos) 584 vlan->nr_egress_mappings++; 585 return 0; 586 } 587 588 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 589 int vlan_dev_set_vlan_flag(const struct net_device *dev, 590 u32 flag, short flag_val) 591 { 592 /* verify flag is supported */ 593 if (flag == VLAN_FLAG_REORDER_HDR) { 594 if (flag_val) { 595 VLAN_DEV_INFO(dev)->flags |= VLAN_FLAG_REORDER_HDR; 596 } else { 597 VLAN_DEV_INFO(dev)->flags &= ~VLAN_FLAG_REORDER_HDR; 598 } 599 return 0; 600 } 601 printk(KERN_ERR "%s: flag %i is not valid.\n", __FUNCTION__, flag); 602 return -EINVAL; 603 } 604 605 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 606 { 607 strncpy(result, VLAN_DEV_INFO(dev)->real_dev->name, 23); 608 } 609 610 void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result) 611 { 612 *result = VLAN_DEV_INFO(dev)->vlan_id; 613 } 614 615 int vlan_dev_open(struct net_device *dev) 616 { 617 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); 618 struct net_device *real_dev = vlan->real_dev; 619 int err; 620 621 if (!(real_dev->flags & IFF_UP)) 622 return -ENETDOWN; 623 624 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { 625 err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); 626 if (err < 0) 627 return err; 628 } 629 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 630 631 if (dev->flags & IFF_ALLMULTI) 632 dev_set_allmulti(real_dev, 1); 633 if (dev->flags & IFF_PROMISC) 634 dev_set_promiscuity(real_dev, 1); 635 636 return 0; 637 } 638 639 int vlan_dev_stop(struct net_device *dev) 640 { 641 struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; 642 643 dev_mc_unsync(real_dev, dev); 644 if (dev->flags & IFF_ALLMULTI) 645 dev_set_allmulti(real_dev, -1); 646 if (dev->flags & IFF_PROMISC) 647 dev_set_promiscuity(real_dev, -1); 648 649 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 650 dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len); 651 652 return 0; 653 } 654 655 int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 656 { 657 struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; 658 struct ifreq ifrr; 659 int err = -EOPNOTSUPP; 660 661 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 662 ifrr.ifr_ifru = ifr->ifr_ifru; 663 664 switch(cmd) { 665 case SIOCGMIIPHY: 666 case SIOCGMIIREG: 667 case SIOCSMIIREG: 668 if (real_dev->do_ioctl && netif_device_present(real_dev)) 669 err = real_dev->do_ioctl(real_dev, &ifrr, cmd); 670 break; 671 672 case SIOCETHTOOL: 673 err = dev_ethtool(&ifrr); 674 } 675 676 if (!err) 677 ifr->ifr_ifru = ifrr.ifr_ifru; 678 679 return err; 680 } 681 682 void vlan_change_rx_flags(struct net_device *dev, int change) 683 { 684 struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; 685 686 if (change & IFF_ALLMULTI) 687 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 688 if (change & IFF_PROMISC) 689 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 690 } 691 692 /** Taken from Gleb + Lennert's VLAN code, and modified... */ 693 void vlan_dev_set_multicast_list(struct net_device *vlan_dev) 694 { 695 dev_mc_sync(VLAN_DEV_INFO(vlan_dev)->real_dev, vlan_dev); 696 } 697