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; 120 unsigned short vid; 121 struct net_device_stats *stats; 122 unsigned short vlan_TCI; 123 __be16 proto; 124 125 if (dev->nd_net != &init_net) { 126 kfree_skb(skb); 127 return -1; 128 } 129 130 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) 131 return -1; 132 133 if (unlikely(!pskb_may_pull(skb, VLAN_HLEN))) { 134 kfree_skb(skb); 135 return -1; 136 } 137 138 vhdr = (struct vlan_hdr *)(skb->data); 139 140 /* vlan_TCI = ntohs(get_unaligned(&vhdr->h_vlan_TCI)); */ 141 vlan_TCI = ntohs(vhdr->h_vlan_TCI); 142 143 vid = (vlan_TCI & VLAN_VID_MASK); 144 145 #ifdef VLAN_DEBUG 146 printk(VLAN_DBG "%s: skb: %p vlan_id: %hx\n", 147 __FUNCTION__, skb, vid); 148 #endif 149 150 /* Ok, we will find the correct VLAN device, strip the header, 151 * and then go on as usual. 152 */ 153 154 /* We have 12 bits of vlan ID. 155 * 156 * We must not drop allow preempt until we hold a 157 * reference to the device (netif_rx does that) or we 158 * fail. 159 */ 160 161 rcu_read_lock(); 162 skb->dev = __find_vlan_dev(dev, vid); 163 if (!skb->dev) { 164 rcu_read_unlock(); 165 166 #ifdef VLAN_DEBUG 167 printk(VLAN_DBG "%s: ERROR: No net_device for VID: %i on dev: %s [%i]\n", 168 __FUNCTION__, (unsigned int)(vid), dev->name, dev->ifindex); 169 #endif 170 kfree_skb(skb); 171 return -1; 172 } 173 174 skb->dev->last_rx = jiffies; 175 176 /* Bump the rx counters for the VLAN device. */ 177 stats = vlan_dev_get_stats(skb->dev); 178 stats->rx_packets++; 179 stats->rx_bytes += skb->len; 180 181 /* Take off the VLAN header (4 bytes currently) */ 182 skb_pull_rcsum(skb, VLAN_HLEN); 183 184 /* Ok, lets check to make sure the device (dev) we 185 * came in on is what this VLAN is attached to. 186 */ 187 188 if (dev != VLAN_DEV_INFO(skb->dev)->real_dev) { 189 rcu_read_unlock(); 190 191 #ifdef VLAN_DEBUG 192 printk(VLAN_DBG "%s: dropping skb: %p because came in on wrong device, dev: %s real_dev: %s, skb_dev: %s\n", 193 __FUNCTION__, skb, dev->name, 194 VLAN_DEV_INFO(skb->dev)->real_dev->name, 195 skb->dev->name); 196 #endif 197 kfree_skb(skb); 198 stats->rx_errors++; 199 return -1; 200 } 201 202 /* 203 * Deal with ingress priority mapping. 204 */ 205 skb->priority = vlan_get_ingress_priority(skb->dev, ntohs(vhdr->h_vlan_TCI)); 206 207 #ifdef VLAN_DEBUG 208 printk(VLAN_DBG "%s: priority: %lu for TCI: %hu (hbo)\n", 209 __FUNCTION__, (unsigned long)(skb->priority), 210 ntohs(vhdr->h_vlan_TCI)); 211 #endif 212 213 /* The ethernet driver already did the pkt_type calculations 214 * for us... 215 */ 216 switch (skb->pkt_type) { 217 case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ 218 // stats->broadcast ++; // no such counter :-( 219 break; 220 221 case PACKET_MULTICAST: 222 stats->multicast++; 223 break; 224 225 case PACKET_OTHERHOST: 226 /* Our lower layer thinks this is not local, let's make sure. 227 * This allows the VLAN to have a different MAC than the underlying 228 * device, and still route correctly. 229 */ 230 if (!compare_ether_addr(eth_hdr(skb)->h_dest, skb->dev->dev_addr)) { 231 /* It is for our (changed) MAC-address! */ 232 skb->pkt_type = PACKET_HOST; 233 } 234 break; 235 default: 236 break; 237 } 238 239 /* Was a VLAN packet, grab the encapsulated protocol, which the layer 240 * three protocols care about. 241 */ 242 /* proto = get_unaligned(&vhdr->h_vlan_encapsulated_proto); */ 243 proto = vhdr->h_vlan_encapsulated_proto; 244 245 skb->protocol = proto; 246 if (ntohs(proto) >= 1536) { 247 /* place it back on the queue to be handled by 248 * true layer 3 protocols. 249 */ 250 251 /* See if we are configured to re-write the VLAN header 252 * to make it look like ethernet... 253 */ 254 skb = vlan_check_reorder_header(skb); 255 256 /* Can be null if skb-clone fails when re-ordering */ 257 if (skb) { 258 netif_rx(skb); 259 } else { 260 /* TODO: Add a more specific counter here. */ 261 stats->rx_errors++; 262 } 263 rcu_read_unlock(); 264 return 0; 265 } 266 267 rawp = skb->data; 268 269 /* 270 * This is a magic hack to spot IPX packets. Older Novell breaks 271 * the protocol design and runs IPX over 802.3 without an 802.2 LLC 272 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This 273 * won't work for fault tolerant netware but does for the rest. 274 */ 275 if (*(unsigned short *)rawp == 0xFFFF) { 276 skb->protocol = htons(ETH_P_802_3); 277 /* place it back on the queue to be handled by true layer 3 protocols. 278 */ 279 280 /* See if we are configured to re-write the VLAN header 281 * to make it look like ethernet... 282 */ 283 skb = vlan_check_reorder_header(skb); 284 285 /* Can be null if skb-clone fails when re-ordering */ 286 if (skb) { 287 netif_rx(skb); 288 } else { 289 /* TODO: Add a more specific counter here. */ 290 stats->rx_errors++; 291 } 292 rcu_read_unlock(); 293 return 0; 294 } 295 296 /* 297 * Real 802.2 LLC 298 */ 299 skb->protocol = htons(ETH_P_802_2); 300 /* place it back on the queue to be handled by upper layer protocols. 301 */ 302 303 /* See if we are configured to re-write the VLAN header 304 * to make it look like ethernet... 305 */ 306 skb = vlan_check_reorder_header(skb); 307 308 /* Can be null if skb-clone fails when re-ordering */ 309 if (skb) { 310 netif_rx(skb); 311 } else { 312 /* TODO: Add a more specific counter here. */ 313 stats->rx_errors++; 314 } 315 rcu_read_unlock(); 316 return 0; 317 } 318 319 static inline unsigned short vlan_dev_get_egress_qos_mask(struct net_device* dev, 320 struct sk_buff* skb) 321 { 322 struct vlan_priority_tci_mapping *mp = 323 VLAN_DEV_INFO(dev)->egress_priority_map[(skb->priority & 0xF)]; 324 325 while (mp) { 326 if (mp->priority == skb->priority) { 327 return mp->vlan_qos; /* This should already be shifted to mask 328 * correctly with the VLAN's TCI 329 */ 330 } 331 mp = mp->next; 332 } 333 return 0; 334 } 335 336 /* 337 * Create the VLAN header for an arbitrary protocol layer 338 * 339 * saddr=NULL means use device source address 340 * daddr=NULL means leave destination address (eg unresolved arp) 341 * 342 * This is called when the SKB is moving down the stack towards the 343 * physical devices. 344 */ 345 int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 346 unsigned short type, 347 const void *daddr, const void *saddr, unsigned len) 348 { 349 struct vlan_hdr *vhdr; 350 unsigned short veth_TCI = 0; 351 int rc = 0; 352 int build_vlan_header = 0; 353 struct net_device *vdev = dev; /* save this for the bottom of the method */ 354 355 #ifdef VLAN_DEBUG 356 printk(VLAN_DBG "%s: skb: %p type: %hx len: %x vlan_id: %hx, daddr: %p\n", 357 __FUNCTION__, skb, type, len, VLAN_DEV_INFO(dev)->vlan_id, daddr); 358 #endif 359 360 /* build vlan header only if re_order_header flag is NOT set. This 361 * fixes some programs that get confused when they see a VLAN device 362 * sending a frame that is VLAN encoded (the consensus is that the VLAN 363 * device should look completely like an Ethernet device when the 364 * REORDER_HEADER flag is set) The drawback to this is some extra 365 * header shuffling in the hard_start_xmit. Users can turn off this 366 * REORDER behaviour with the vconfig tool. 367 */ 368 if (!(VLAN_DEV_INFO(dev)->flags & VLAN_FLAG_REORDER_HDR)) 369 build_vlan_header = 1; 370 371 if (build_vlan_header) { 372 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 373 374 /* build the four bytes that make this a VLAN header. */ 375 376 /* Now, construct the second two bytes. This field looks something 377 * like: 378 * usr_priority: 3 bits (high bits) 379 * CFI 1 bit 380 * VLAN ID 12 bits (low bits) 381 * 382 */ 383 veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; 384 veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 385 386 vhdr->h_vlan_TCI = htons(veth_TCI); 387 388 /* 389 * Set the protocol type. 390 * For a packet of type ETH_P_802_3 we put the length in here instead. 391 * It is up to the 802.2 layer to carry protocol information. 392 */ 393 394 if (type != ETH_P_802_3) { 395 vhdr->h_vlan_encapsulated_proto = htons(type); 396 } else { 397 vhdr->h_vlan_encapsulated_proto = htons(len); 398 } 399 400 skb->protocol = htons(ETH_P_8021Q); 401 skb_reset_network_header(skb); 402 } 403 404 /* Before delegating work to the lower layer, enter our MAC-address */ 405 if (saddr == NULL) 406 saddr = dev->dev_addr; 407 408 dev = VLAN_DEV_INFO(dev)->real_dev; 409 410 /* MPLS can send us skbuffs w/out enough space. This check will grow the 411 * skb if it doesn't have enough headroom. Not a beautiful solution, so 412 * I'll tick a counter so that users can know it's happening... If they 413 * care... 414 */ 415 416 /* NOTE: This may still break if the underlying device is not the final 417 * device (and thus there are more headers to add...) It should work for 418 * good-ole-ethernet though. 419 */ 420 if (skb_headroom(skb) < dev->hard_header_len) { 421 struct sk_buff *sk_tmp = skb; 422 skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len); 423 kfree_skb(sk_tmp); 424 if (skb == NULL) { 425 struct net_device_stats *stats = vlan_dev_get_stats(vdev); 426 stats->tx_dropped++; 427 return -ENOMEM; 428 } 429 VLAN_DEV_INFO(vdev)->cnt_inc_headroom_on_tx++; 430 #ifdef VLAN_DEBUG 431 printk(VLAN_DBG "%s: %s: had to grow skb.\n", __FUNCTION__, vdev->name); 432 #endif 433 } 434 435 if (build_vlan_header) { 436 /* Now make the underlying real hard header */ 437 rc = dev_hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, 438 len + VLAN_HLEN); 439 if (rc > 0) 440 rc += VLAN_HLEN; 441 else if (rc < 0) 442 rc -= VLAN_HLEN; 443 } else 444 /* If here, then we'll just make a normal looking ethernet frame, 445 * but, the hard_start_xmit method will insert the tag (it has to 446 * be able to do this for bridged and other skbs that don't come 447 * down the protocol stack in an orderly manner. 448 */ 449 rc = dev_hard_header(skb, dev, type, daddr, saddr, len); 450 451 return rc; 452 } 453 454 int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 455 { 456 struct net_device_stats *stats = vlan_dev_get_stats(dev); 457 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 458 459 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 460 * 461 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 462 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 463 */ 464 465 if (veth->h_vlan_proto != htons(ETH_P_8021Q)) { 466 int orig_headroom = skb_headroom(skb); 467 unsigned short veth_TCI; 468 469 /* This is not a VLAN frame...but we can fix that! */ 470 VLAN_DEV_INFO(dev)->cnt_encap_on_xmit++; 471 472 #ifdef VLAN_DEBUG 473 printk(VLAN_DBG "%s: proto to encap: 0x%hx (hbo)\n", 474 __FUNCTION__, htons(veth->h_vlan_proto)); 475 #endif 476 /* Construct the second two bytes. This field looks something 477 * like: 478 * usr_priority: 3 bits (high bits) 479 * CFI 1 bit 480 * VLAN ID 12 bits (low bits) 481 */ 482 veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; 483 veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 484 485 skb = __vlan_put_tag(skb, veth_TCI); 486 if (!skb) { 487 stats->tx_dropped++; 488 return 0; 489 } 490 491 if (orig_headroom < VLAN_HLEN) { 492 VLAN_DEV_INFO(dev)->cnt_inc_headroom_on_tx++; 493 } 494 } 495 496 #ifdef VLAN_DEBUG 497 printk(VLAN_DBG "%s: about to send skb: %p to dev: %s\n", 498 __FUNCTION__, skb, skb->dev->name); 499 printk(VLAN_DBG " %2hx.%2hx.%2hx.%2xh.%2hx.%2hx %2hx.%2hx.%2hx.%2hx.%2hx.%2hx %4hx %4hx %4hx\n", 500 veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], veth->h_dest[3], veth->h_dest[4], veth->h_dest[5], 501 veth->h_source[0], veth->h_source[1], veth->h_source[2], veth->h_source[3], veth->h_source[4], veth->h_source[5], 502 veth->h_vlan_proto, veth->h_vlan_TCI, veth->h_vlan_encapsulated_proto); 503 #endif 504 505 stats->tx_packets++; /* for statics only */ 506 stats->tx_bytes += skb->len; 507 508 skb->dev = VLAN_DEV_INFO(dev)->real_dev; 509 dev_queue_xmit(skb); 510 511 return 0; 512 } 513 514 int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 515 { 516 struct net_device_stats *stats = vlan_dev_get_stats(dev); 517 unsigned short veth_TCI; 518 519 /* Construct the second two bytes. This field looks something 520 * like: 521 * usr_priority: 3 bits (high bits) 522 * CFI 1 bit 523 * VLAN ID 12 bits (low bits) 524 */ 525 veth_TCI = VLAN_DEV_INFO(dev)->vlan_id; 526 veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb); 527 skb = __vlan_hwaccel_put_tag(skb, veth_TCI); 528 529 stats->tx_packets++; 530 stats->tx_bytes += skb->len; 531 532 skb->dev = VLAN_DEV_INFO(dev)->real_dev; 533 dev_queue_xmit(skb); 534 535 return 0; 536 } 537 538 int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 539 { 540 /* TODO: gotta make sure the underlying layer can handle it, 541 * maybe an IFF_VLAN_CAPABLE flag for devices? 542 */ 543 if (VLAN_DEV_INFO(dev)->real_dev->mtu < new_mtu) 544 return -ERANGE; 545 546 dev->mtu = new_mtu; 547 548 return 0; 549 } 550 551 void vlan_dev_set_ingress_priority(const struct net_device *dev, 552 u32 skb_prio, short vlan_prio) 553 { 554 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); 555 556 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 557 vlan->nr_ingress_mappings--; 558 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 559 vlan->nr_ingress_mappings++; 560 561 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 562 } 563 564 int vlan_dev_set_egress_priority(const struct net_device *dev, 565 u32 skb_prio, short vlan_prio) 566 { 567 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); 568 struct vlan_priority_tci_mapping *mp = NULL; 569 struct vlan_priority_tci_mapping *np; 570 u32 vlan_qos = (vlan_prio << 13) & 0xE000; 571 572 /* See if a priority mapping exists.. */ 573 mp = vlan->egress_priority_map[skb_prio & 0xF]; 574 while (mp) { 575 if (mp->priority == skb_prio) { 576 if (mp->vlan_qos && !vlan_qos) 577 vlan->nr_egress_mappings--; 578 else if (!mp->vlan_qos && vlan_qos) 579 vlan->nr_egress_mappings++; 580 mp->vlan_qos = vlan_qos; 581 return 0; 582 } 583 mp = mp->next; 584 } 585 586 /* Create a new mapping then. */ 587 mp = vlan->egress_priority_map[skb_prio & 0xF]; 588 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 589 if (!np) 590 return -ENOBUFS; 591 592 np->next = mp; 593 np->priority = skb_prio; 594 np->vlan_qos = vlan_qos; 595 vlan->egress_priority_map[skb_prio & 0xF] = np; 596 if (vlan_qos) 597 vlan->nr_egress_mappings++; 598 return 0; 599 } 600 601 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 602 int vlan_dev_set_vlan_flag(const struct net_device *dev, 603 u32 flag, short flag_val) 604 { 605 /* verify flag is supported */ 606 if (flag == VLAN_FLAG_REORDER_HDR) { 607 if (flag_val) { 608 VLAN_DEV_INFO(dev)->flags |= VLAN_FLAG_REORDER_HDR; 609 } else { 610 VLAN_DEV_INFO(dev)->flags &= ~VLAN_FLAG_REORDER_HDR; 611 } 612 return 0; 613 } 614 printk(KERN_ERR "%s: flag %i is not valid.\n", __FUNCTION__, flag); 615 return -EINVAL; 616 } 617 618 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 619 { 620 strncpy(result, VLAN_DEV_INFO(dev)->real_dev->name, 23); 621 } 622 623 void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result) 624 { 625 *result = VLAN_DEV_INFO(dev)->vlan_id; 626 } 627 628 int vlan_dev_open(struct net_device *dev) 629 { 630 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); 631 struct net_device *real_dev = vlan->real_dev; 632 int err; 633 634 if (!(real_dev->flags & IFF_UP)) 635 return -ENETDOWN; 636 637 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { 638 err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); 639 if (err < 0) 640 return err; 641 } 642 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 643 644 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 return 0; 650 } 651 652 int vlan_dev_stop(struct net_device *dev) 653 { 654 struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; 655 656 dev_mc_unsync(real_dev, dev); 657 if (dev->flags & IFF_ALLMULTI) 658 dev_set_allmulti(real_dev, -1); 659 if (dev->flags & IFF_PROMISC) 660 dev_set_promiscuity(real_dev, -1); 661 662 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 663 dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len); 664 665 return 0; 666 } 667 668 int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 669 { 670 struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; 671 struct ifreq ifrr; 672 int err = -EOPNOTSUPP; 673 674 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 675 ifrr.ifr_ifru = ifr->ifr_ifru; 676 677 switch(cmd) { 678 case SIOCGMIIPHY: 679 case SIOCGMIIREG: 680 case SIOCSMIIREG: 681 if (real_dev->do_ioctl && netif_device_present(real_dev)) 682 err = real_dev->do_ioctl(real_dev, &ifrr, cmd); 683 break; 684 } 685 686 if (!err) 687 ifr->ifr_ifru = ifrr.ifr_ifru; 688 689 return err; 690 } 691 692 void vlan_change_rx_flags(struct net_device *dev, int change) 693 { 694 struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; 695 696 if (change & IFF_ALLMULTI) 697 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 698 if (change & IFF_PROMISC) 699 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 700 } 701 702 /** Taken from Gleb + Lennert's VLAN code, and modified... */ 703 void vlan_dev_set_multicast_list(struct net_device *vlan_dev) 704 { 705 dev_mc_sync(VLAN_DEV_INFO(vlan_dev)->real_dev, vlan_dev); 706 } 707