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 __constant_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 skb->dev->last_rx = jiffies; 167 168 stats = &skb->dev->stats; 169 stats->rx_packets++; 170 stats->rx_bytes += skb->len; 171 172 skb_pull_rcsum(skb, VLAN_HLEN); 173 174 skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci); 175 176 pr_debug("%s: priority: %u for TCI: %hu\n", 177 __func__, skb->priority, vlan_tci); 178 179 switch (skb->pkt_type) { 180 case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ 181 /* stats->broadcast ++; // no such counter :-( */ 182 break; 183 184 case PACKET_MULTICAST: 185 stats->multicast++; 186 break; 187 188 case PACKET_OTHERHOST: 189 /* Our lower layer thinks this is not local, let's make sure. 190 * This allows the VLAN to have a different MAC than the 191 * underlying device, and still route correctly. 192 */ 193 if (!compare_ether_addr(eth_hdr(skb)->h_dest, 194 skb->dev->dev_addr)) 195 skb->pkt_type = PACKET_HOST; 196 break; 197 default: 198 break; 199 } 200 201 vlan_set_encap_proto(skb, vhdr); 202 203 skb = vlan_check_reorder_header(skb); 204 if (!skb) { 205 stats->rx_errors++; 206 goto err_unlock; 207 } 208 209 netif_rx(skb); 210 rcu_read_unlock(); 211 return NET_RX_SUCCESS; 212 213 err_unlock: 214 rcu_read_unlock(); 215 err_free: 216 kfree_skb(skb); 217 return NET_RX_DROP; 218 } 219 220 static inline u16 221 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) 222 { 223 struct vlan_priority_tci_mapping *mp; 224 225 mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; 226 while (mp) { 227 if (mp->priority == skb->priority) { 228 return mp->vlan_qos; /* This should already be shifted 229 * to mask correctly with the 230 * VLAN's TCI */ 231 } 232 mp = mp->next; 233 } 234 return 0; 235 } 236 237 /* 238 * Create the VLAN header for an arbitrary protocol layer 239 * 240 * saddr=NULL means use device source address 241 * daddr=NULL means leave destination address (eg unresolved arp) 242 * 243 * This is called when the SKB is moving down the stack towards the 244 * physical devices. 245 */ 246 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 247 unsigned short type, 248 const void *daddr, const void *saddr, 249 unsigned int len) 250 { 251 struct vlan_hdr *vhdr; 252 unsigned int vhdrlen = 0; 253 u16 vlan_tci = 0; 254 int rc; 255 256 if (WARN_ON(skb_headroom(skb) < dev->hard_header_len)) 257 return -ENOSPC; 258 259 if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) { 260 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 261 262 vlan_tci = vlan_dev_info(dev)->vlan_id; 263 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 264 vhdr->h_vlan_TCI = htons(vlan_tci); 265 266 /* 267 * Set the protocol type. For a packet of type ETH_P_802_3 we 268 * put the length in here instead. It is up to the 802.2 269 * layer to carry protocol information. 270 */ 271 if (type != ETH_P_802_3) 272 vhdr->h_vlan_encapsulated_proto = htons(type); 273 else 274 vhdr->h_vlan_encapsulated_proto = htons(len); 275 276 skb->protocol = htons(ETH_P_8021Q); 277 type = ETH_P_8021Q; 278 vhdrlen = VLAN_HLEN; 279 } 280 281 /* Before delegating work to the lower layer, enter our MAC-address */ 282 if (saddr == NULL) 283 saddr = dev->dev_addr; 284 285 /* Now make the underlying real hard header */ 286 dev = vlan_dev_info(dev)->real_dev; 287 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 288 if (rc > 0) 289 rc += vhdrlen; 290 return rc; 291 } 292 293 static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 294 { 295 struct net_device_stats *stats = &dev->stats; 296 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 297 298 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 299 * 300 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 301 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 302 */ 303 if (veth->h_vlan_proto != htons(ETH_P_8021Q) || 304 vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { 305 unsigned int orig_headroom = skb_headroom(skb); 306 u16 vlan_tci; 307 308 vlan_dev_info(dev)->cnt_encap_on_xmit++; 309 310 vlan_tci = vlan_dev_info(dev)->vlan_id; 311 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 312 skb = __vlan_put_tag(skb, vlan_tci); 313 if (!skb) { 314 stats->tx_dropped++; 315 return NETDEV_TX_OK; 316 } 317 318 if (orig_headroom < VLAN_HLEN) 319 vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; 320 } 321 322 stats->tx_packets++; 323 stats->tx_bytes += skb->len; 324 325 skb->dev = vlan_dev_info(dev)->real_dev; 326 dev_queue_xmit(skb); 327 return NETDEV_TX_OK; 328 } 329 330 static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, 331 struct net_device *dev) 332 { 333 struct net_device_stats *stats = &dev->stats; 334 u16 vlan_tci; 335 336 vlan_tci = vlan_dev_info(dev)->vlan_id; 337 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 338 skb = __vlan_hwaccel_put_tag(skb, vlan_tci); 339 340 stats->tx_packets++; 341 stats->tx_bytes += skb->len; 342 343 skb->dev = vlan_dev_info(dev)->real_dev; 344 dev_queue_xmit(skb); 345 return NETDEV_TX_OK; 346 } 347 348 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 349 { 350 /* TODO: gotta make sure the underlying layer can handle it, 351 * maybe an IFF_VLAN_CAPABLE flag for devices? 352 */ 353 if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) 354 return -ERANGE; 355 356 dev->mtu = new_mtu; 357 358 return 0; 359 } 360 361 void vlan_dev_set_ingress_priority(const struct net_device *dev, 362 u32 skb_prio, u16 vlan_prio) 363 { 364 struct vlan_dev_info *vlan = vlan_dev_info(dev); 365 366 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 367 vlan->nr_ingress_mappings--; 368 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 369 vlan->nr_ingress_mappings++; 370 371 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 372 } 373 374 int vlan_dev_set_egress_priority(const struct net_device *dev, 375 u32 skb_prio, u16 vlan_prio) 376 { 377 struct vlan_dev_info *vlan = vlan_dev_info(dev); 378 struct vlan_priority_tci_mapping *mp = NULL; 379 struct vlan_priority_tci_mapping *np; 380 u32 vlan_qos = (vlan_prio << 13) & 0xE000; 381 382 /* See if a priority mapping exists.. */ 383 mp = vlan->egress_priority_map[skb_prio & 0xF]; 384 while (mp) { 385 if (mp->priority == skb_prio) { 386 if (mp->vlan_qos && !vlan_qos) 387 vlan->nr_egress_mappings--; 388 else if (!mp->vlan_qos && vlan_qos) 389 vlan->nr_egress_mappings++; 390 mp->vlan_qos = vlan_qos; 391 return 0; 392 } 393 mp = mp->next; 394 } 395 396 /* Create a new mapping then. */ 397 mp = vlan->egress_priority_map[skb_prio & 0xF]; 398 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 399 if (!np) 400 return -ENOBUFS; 401 402 np->next = mp; 403 np->priority = skb_prio; 404 np->vlan_qos = vlan_qos; 405 vlan->egress_priority_map[skb_prio & 0xF] = np; 406 if (vlan_qos) 407 vlan->nr_egress_mappings++; 408 return 0; 409 } 410 411 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 412 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 413 { 414 struct vlan_dev_info *vlan = vlan_dev_info(dev); 415 u32 old_flags = vlan->flags; 416 417 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP)) 418 return -EINVAL; 419 420 vlan->flags = (old_flags & ~mask) | (flags & mask); 421 422 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 423 if (vlan->flags & VLAN_FLAG_GVRP) 424 vlan_gvrp_request_join(dev); 425 else 426 vlan_gvrp_request_leave(dev); 427 } 428 return 0; 429 } 430 431 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 432 { 433 strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); 434 } 435 436 static int vlan_dev_open(struct net_device *dev) 437 { 438 struct vlan_dev_info *vlan = vlan_dev_info(dev); 439 struct net_device *real_dev = vlan->real_dev; 440 int err; 441 442 if (!(real_dev->flags & IFF_UP)) 443 return -ENETDOWN; 444 445 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { 446 err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN); 447 if (err < 0) 448 goto out; 449 } 450 451 if (dev->flags & IFF_ALLMULTI) { 452 err = dev_set_allmulti(real_dev, 1); 453 if (err < 0) 454 goto del_unicast; 455 } 456 if (dev->flags & IFF_PROMISC) { 457 err = dev_set_promiscuity(real_dev, 1); 458 if (err < 0) 459 goto clear_allmulti; 460 } 461 462 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 463 464 if (vlan->flags & VLAN_FLAG_GVRP) 465 vlan_gvrp_request_join(dev); 466 467 return 0; 468 469 clear_allmulti: 470 if (dev->flags & IFF_ALLMULTI) 471 dev_set_allmulti(real_dev, -1); 472 del_unicast: 473 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 474 dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); 475 out: 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 return 0; 498 } 499 500 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 501 { 502 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 503 struct sockaddr *addr = p; 504 int err; 505 506 if (!is_valid_ether_addr(addr->sa_data)) 507 return -EADDRNOTAVAIL; 508 509 if (!(dev->flags & IFF_UP)) 510 goto out; 511 512 if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { 513 err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN); 514 if (err < 0) 515 return err; 516 } 517 518 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 519 dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN); 520 521 out: 522 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 523 return 0; 524 } 525 526 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 527 { 528 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 529 struct ifreq ifrr; 530 int err = -EOPNOTSUPP; 531 532 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 533 ifrr.ifr_ifru = ifr->ifr_ifru; 534 535 switch (cmd) { 536 case SIOCGMIIPHY: 537 case SIOCGMIIREG: 538 case SIOCSMIIREG: 539 if (real_dev->do_ioctl && netif_device_present(real_dev)) 540 err = real_dev->do_ioctl(real_dev, &ifrr, cmd); 541 break; 542 } 543 544 if (!err) 545 ifr->ifr_ifru = ifrr.ifr_ifru; 546 547 return err; 548 } 549 550 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 551 { 552 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 553 554 if (change & IFF_ALLMULTI) 555 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 556 if (change & IFF_PROMISC) 557 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 558 } 559 560 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 561 { 562 dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 563 dev_unicast_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 564 } 565 566 /* 567 * vlan network devices have devices nesting below it, and are a special 568 * "super class" of normal network devices; split their locks off into a 569 * separate class since they always nest. 570 */ 571 static struct lock_class_key vlan_netdev_xmit_lock_key; 572 static struct lock_class_key vlan_netdev_addr_lock_key; 573 574 static void vlan_dev_set_lockdep_one(struct net_device *dev, 575 struct netdev_queue *txq, 576 void *_subclass) 577 { 578 lockdep_set_class_and_subclass(&txq->_xmit_lock, 579 &vlan_netdev_xmit_lock_key, 580 *(int *)_subclass); 581 } 582 583 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 584 { 585 lockdep_set_class_and_subclass(&dev->addr_list_lock, 586 &vlan_netdev_addr_lock_key, 587 subclass); 588 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 589 } 590 591 static const struct header_ops vlan_header_ops = { 592 .create = vlan_dev_hard_header, 593 .rebuild = vlan_dev_rebuild_header, 594 .parse = eth_header_parse, 595 }; 596 597 static int vlan_dev_init(struct net_device *dev) 598 { 599 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 600 int subclass = 0; 601 602 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 603 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI); 604 dev->iflink = real_dev->ifindex; 605 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 606 (1<<__LINK_STATE_DORMANT))) | 607 (1<<__LINK_STATE_PRESENT); 608 609 dev->features |= real_dev->features & real_dev->vlan_features; 610 611 /* ipv6 shared card related stuff */ 612 dev->dev_id = real_dev->dev_id; 613 614 if (is_zero_ether_addr(dev->dev_addr)) 615 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); 616 if (is_zero_ether_addr(dev->broadcast)) 617 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 618 619 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 620 dev->header_ops = real_dev->header_ops; 621 dev->hard_header_len = real_dev->hard_header_len; 622 dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; 623 } else { 624 dev->header_ops = &vlan_header_ops; 625 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 626 dev->hard_start_xmit = vlan_dev_hard_start_xmit; 627 } 628 629 if (is_vlan_dev(real_dev)) 630 subclass = 1; 631 632 vlan_dev_set_lockdep_class(dev, subclass); 633 return 0; 634 } 635 636 static void vlan_dev_uninit(struct net_device *dev) 637 { 638 struct vlan_priority_tci_mapping *pm; 639 struct vlan_dev_info *vlan = vlan_dev_info(dev); 640 int i; 641 642 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 643 while ((pm = vlan->egress_priority_map[i]) != NULL) { 644 vlan->egress_priority_map[i] = pm->next; 645 kfree(pm); 646 } 647 } 648 } 649 650 static u32 vlan_ethtool_get_rx_csum(struct net_device *dev) 651 { 652 const struct vlan_dev_info *vlan = vlan_dev_info(dev); 653 struct net_device *real_dev = vlan->real_dev; 654 655 if (real_dev->ethtool_ops == NULL || 656 real_dev->ethtool_ops->get_rx_csum == NULL) 657 return 0; 658 return real_dev->ethtool_ops->get_rx_csum(real_dev); 659 } 660 661 static u32 vlan_ethtool_get_flags(struct net_device *dev) 662 { 663 const struct vlan_dev_info *vlan = vlan_dev_info(dev); 664 struct net_device *real_dev = vlan->real_dev; 665 666 if (!(real_dev->features & NETIF_F_HW_VLAN_RX) || 667 real_dev->ethtool_ops == NULL || 668 real_dev->ethtool_ops->get_flags == NULL) 669 return 0; 670 return real_dev->ethtool_ops->get_flags(real_dev); 671 } 672 673 static const struct ethtool_ops vlan_ethtool_ops = { 674 .get_link = ethtool_op_get_link, 675 .get_rx_csum = vlan_ethtool_get_rx_csum, 676 .get_flags = vlan_ethtool_get_flags, 677 }; 678 679 void vlan_setup(struct net_device *dev) 680 { 681 ether_setup(dev); 682 683 dev->priv_flags |= IFF_802_1Q_VLAN; 684 dev->tx_queue_len = 0; 685 686 dev->change_mtu = vlan_dev_change_mtu; 687 dev->init = vlan_dev_init; 688 dev->uninit = vlan_dev_uninit; 689 dev->open = vlan_dev_open; 690 dev->stop = vlan_dev_stop; 691 dev->set_mac_address = vlan_dev_set_mac_address; 692 dev->set_rx_mode = vlan_dev_set_rx_mode; 693 dev->set_multicast_list = vlan_dev_set_rx_mode; 694 dev->change_rx_flags = vlan_dev_change_rx_flags; 695 dev->do_ioctl = vlan_dev_ioctl; 696 dev->destructor = free_netdev; 697 dev->ethtool_ops = &vlan_ethtool_ops; 698 699 memset(dev->broadcast, 0, ETH_ALEN); 700 } 701