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 vlan_rx_stats *rx_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 rx_stats = per_cpu_ptr(vlan_dev_info(skb->dev)->vlan_rx_stats, 167 smp_processor_id()); 168 rx_stats->rx_packets++; 169 rx_stats->rx_bytes += skb->len; 170 171 skb_pull_rcsum(skb, VLAN_HLEN); 172 173 skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci); 174 175 pr_debug("%s: priority: %u for TCI: %hu\n", 176 __func__, skb->priority, vlan_tci); 177 178 switch (skb->pkt_type) { 179 case PACKET_BROADCAST: /* Yeah, stats collect these together.. */ 180 /* stats->broadcast ++; // no such counter :-( */ 181 break; 182 183 case PACKET_MULTICAST: 184 rx_stats->multicast++; 185 break; 186 187 case PACKET_OTHERHOST: 188 /* Our lower layer thinks this is not local, let's make sure. 189 * This allows the VLAN to have a different MAC than the 190 * underlying device, and still route correctly. 191 */ 192 if (!compare_ether_addr(eth_hdr(skb)->h_dest, 193 skb->dev->dev_addr)) 194 skb->pkt_type = PACKET_HOST; 195 break; 196 default: 197 break; 198 } 199 200 vlan_set_encap_proto(skb, vhdr); 201 202 skb = vlan_check_reorder_header(skb); 203 if (!skb) { 204 rx_stats->rx_errors++; 205 goto err_unlock; 206 } 207 208 netif_rx(skb); 209 rcu_read_unlock(); 210 return NET_RX_SUCCESS; 211 212 err_unlock: 213 rcu_read_unlock(); 214 err_free: 215 kfree_skb(skb); 216 return NET_RX_DROP; 217 } 218 219 static inline u16 220 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) 221 { 222 struct vlan_priority_tci_mapping *mp; 223 224 mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)]; 225 while (mp) { 226 if (mp->priority == skb->priority) { 227 return mp->vlan_qos; /* This should already be shifted 228 * to mask correctly with the 229 * VLAN's TCI */ 230 } 231 mp = mp->next; 232 } 233 return 0; 234 } 235 236 /* 237 * Create the VLAN header for an arbitrary protocol layer 238 * 239 * saddr=NULL means use device source address 240 * daddr=NULL means leave destination address (eg unresolved arp) 241 * 242 * This is called when the SKB is moving down the stack towards the 243 * physical devices. 244 */ 245 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 246 unsigned short type, 247 const void *daddr, const void *saddr, 248 unsigned int len) 249 { 250 struct vlan_hdr *vhdr; 251 unsigned int vhdrlen = 0; 252 u16 vlan_tci = 0; 253 int rc; 254 255 if (WARN_ON(skb_headroom(skb) < dev->hard_header_len)) 256 return -ENOSPC; 257 258 if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) { 259 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 260 261 vlan_tci = vlan_dev_info(dev)->vlan_id; 262 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 263 vhdr->h_vlan_TCI = htons(vlan_tci); 264 265 /* 266 * Set the protocol type. For a packet of type ETH_P_802_3/2 we 267 * put the length in here instead. 268 */ 269 if (type != ETH_P_802_3 && type != ETH_P_802_2) 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 netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 292 struct net_device *dev) 293 { 294 int i = skb_get_queue_mapping(skb); 295 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 296 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 297 unsigned int len; 298 int ret; 299 300 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 301 * 302 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 303 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 304 */ 305 if (veth->h_vlan_proto != htons(ETH_P_8021Q) || 306 vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) { 307 unsigned int orig_headroom = skb_headroom(skb); 308 u16 vlan_tci; 309 310 vlan_dev_info(dev)->cnt_encap_on_xmit++; 311 312 vlan_tci = vlan_dev_info(dev)->vlan_id; 313 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 314 skb = __vlan_put_tag(skb, vlan_tci); 315 if (!skb) { 316 txq->tx_dropped++; 317 return NETDEV_TX_OK; 318 } 319 320 if (orig_headroom < VLAN_HLEN) 321 vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; 322 } 323 324 325 skb_set_dev(skb, vlan_dev_info(dev)->real_dev); 326 len = skb->len; 327 ret = dev_queue_xmit(skb); 328 329 if (likely(ret == NET_XMIT_SUCCESS)) { 330 txq->tx_packets++; 331 txq->tx_bytes += len; 332 } else 333 txq->tx_dropped++; 334 335 return ret; 336 } 337 338 static netdev_tx_t vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, 339 struct net_device *dev) 340 { 341 int i = skb_get_queue_mapping(skb); 342 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 343 u16 vlan_tci; 344 unsigned int len; 345 int ret; 346 347 vlan_tci = vlan_dev_info(dev)->vlan_id; 348 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 349 skb = __vlan_hwaccel_put_tag(skb, vlan_tci); 350 351 skb->dev = vlan_dev_info(dev)->real_dev; 352 len = skb->len; 353 ret = dev_queue_xmit(skb); 354 355 if (likely(ret == NET_XMIT_SUCCESS)) { 356 txq->tx_packets++; 357 txq->tx_bytes += len; 358 } else 359 txq->tx_dropped++; 360 361 return ret; 362 } 363 364 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 365 { 366 /* TODO: gotta make sure the underlying layer can handle it, 367 * maybe an IFF_VLAN_CAPABLE flag for devices? 368 */ 369 if (vlan_dev_info(dev)->real_dev->mtu < new_mtu) 370 return -ERANGE; 371 372 dev->mtu = new_mtu; 373 374 return 0; 375 } 376 377 void vlan_dev_set_ingress_priority(const struct net_device *dev, 378 u32 skb_prio, u16 vlan_prio) 379 { 380 struct vlan_dev_info *vlan = vlan_dev_info(dev); 381 382 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 383 vlan->nr_ingress_mappings--; 384 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 385 vlan->nr_ingress_mappings++; 386 387 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 388 } 389 390 int vlan_dev_set_egress_priority(const struct net_device *dev, 391 u32 skb_prio, u16 vlan_prio) 392 { 393 struct vlan_dev_info *vlan = vlan_dev_info(dev); 394 struct vlan_priority_tci_mapping *mp = NULL; 395 struct vlan_priority_tci_mapping *np; 396 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 397 398 /* See if a priority mapping exists.. */ 399 mp = vlan->egress_priority_map[skb_prio & 0xF]; 400 while (mp) { 401 if (mp->priority == skb_prio) { 402 if (mp->vlan_qos && !vlan_qos) 403 vlan->nr_egress_mappings--; 404 else if (!mp->vlan_qos && vlan_qos) 405 vlan->nr_egress_mappings++; 406 mp->vlan_qos = vlan_qos; 407 return 0; 408 } 409 mp = mp->next; 410 } 411 412 /* Create a new mapping then. */ 413 mp = vlan->egress_priority_map[skb_prio & 0xF]; 414 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 415 if (!np) 416 return -ENOBUFS; 417 418 np->next = mp; 419 np->priority = skb_prio; 420 np->vlan_qos = vlan_qos; 421 vlan->egress_priority_map[skb_prio & 0xF] = np; 422 if (vlan_qos) 423 vlan->nr_egress_mappings++; 424 return 0; 425 } 426 427 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 428 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 429 { 430 struct vlan_dev_info *vlan = vlan_dev_info(dev); 431 u32 old_flags = vlan->flags; 432 433 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 434 VLAN_FLAG_LOOSE_BINDING)) 435 return -EINVAL; 436 437 vlan->flags = (old_flags & ~mask) | (flags & mask); 438 439 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 440 if (vlan->flags & VLAN_FLAG_GVRP) 441 vlan_gvrp_request_join(dev); 442 else 443 vlan_gvrp_request_leave(dev); 444 } 445 return 0; 446 } 447 448 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 449 { 450 strncpy(result, vlan_dev_info(dev)->real_dev->name, 23); 451 } 452 453 static int vlan_dev_open(struct net_device *dev) 454 { 455 struct vlan_dev_info *vlan = vlan_dev_info(dev); 456 struct net_device *real_dev = vlan->real_dev; 457 int err; 458 459 if (!(real_dev->flags & IFF_UP) && 460 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 461 return -ENETDOWN; 462 463 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) { 464 err = dev_unicast_add(real_dev, dev->dev_addr); 465 if (err < 0) 466 goto out; 467 } 468 469 if (dev->flags & IFF_ALLMULTI) { 470 err = dev_set_allmulti(real_dev, 1); 471 if (err < 0) 472 goto del_unicast; 473 } 474 if (dev->flags & IFF_PROMISC) { 475 err = dev_set_promiscuity(real_dev, 1); 476 if (err < 0) 477 goto clear_allmulti; 478 } 479 480 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 481 482 if (vlan->flags & VLAN_FLAG_GVRP) 483 vlan_gvrp_request_join(dev); 484 485 netif_carrier_on(dev); 486 return 0; 487 488 clear_allmulti: 489 if (dev->flags & IFF_ALLMULTI) 490 dev_set_allmulti(real_dev, -1); 491 del_unicast: 492 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 493 dev_unicast_delete(real_dev, dev->dev_addr); 494 out: 495 netif_carrier_off(dev); 496 return err; 497 } 498 499 static int vlan_dev_stop(struct net_device *dev) 500 { 501 struct vlan_dev_info *vlan = vlan_dev_info(dev); 502 struct net_device *real_dev = vlan->real_dev; 503 504 if (vlan->flags & VLAN_FLAG_GVRP) 505 vlan_gvrp_request_leave(dev); 506 507 dev_mc_unsync(real_dev, dev); 508 dev_unicast_unsync(real_dev, dev); 509 if (dev->flags & IFF_ALLMULTI) 510 dev_set_allmulti(real_dev, -1); 511 if (dev->flags & IFF_PROMISC) 512 dev_set_promiscuity(real_dev, -1); 513 514 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 515 dev_unicast_delete(real_dev, dev->dev_addr); 516 517 netif_carrier_off(dev); 518 return 0; 519 } 520 521 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 522 { 523 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 524 struct sockaddr *addr = p; 525 int err; 526 527 if (!is_valid_ether_addr(addr->sa_data)) 528 return -EADDRNOTAVAIL; 529 530 if (!(dev->flags & IFF_UP)) 531 goto out; 532 533 if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) { 534 err = dev_unicast_add(real_dev, addr->sa_data); 535 if (err < 0) 536 return err; 537 } 538 539 if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) 540 dev_unicast_delete(real_dev, dev->dev_addr); 541 542 out: 543 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 544 return 0; 545 } 546 547 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 548 { 549 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 550 const struct net_device_ops *ops = real_dev->netdev_ops; 551 struct ifreq ifrr; 552 int err = -EOPNOTSUPP; 553 554 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 555 ifrr.ifr_ifru = ifr->ifr_ifru; 556 557 switch (cmd) { 558 case SIOCGMIIPHY: 559 case SIOCGMIIREG: 560 case SIOCSMIIREG: 561 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 562 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 563 break; 564 } 565 566 if (!err) 567 ifr->ifr_ifru = ifrr.ifr_ifru; 568 569 return err; 570 } 571 572 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 573 { 574 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 575 const struct net_device_ops *ops = real_dev->netdev_ops; 576 int err = 0; 577 578 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 579 err = ops->ndo_neigh_setup(real_dev, pa); 580 581 return err; 582 } 583 584 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 585 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 586 struct scatterlist *sgl, unsigned int sgc) 587 { 588 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 589 const struct net_device_ops *ops = real_dev->netdev_ops; 590 int rc = 0; 591 592 if (ops->ndo_fcoe_ddp_setup) 593 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 594 595 return rc; 596 } 597 598 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 599 { 600 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 601 const struct net_device_ops *ops = real_dev->netdev_ops; 602 int len = 0; 603 604 if (ops->ndo_fcoe_ddp_done) 605 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 606 607 return len; 608 } 609 610 static int vlan_dev_fcoe_enable(struct net_device *dev) 611 { 612 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 613 const struct net_device_ops *ops = real_dev->netdev_ops; 614 int rc = -EINVAL; 615 616 if (ops->ndo_fcoe_enable) 617 rc = ops->ndo_fcoe_enable(real_dev); 618 return rc; 619 } 620 621 static int vlan_dev_fcoe_disable(struct net_device *dev) 622 { 623 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 624 const struct net_device_ops *ops = real_dev->netdev_ops; 625 int rc = -EINVAL; 626 627 if (ops->ndo_fcoe_disable) 628 rc = ops->ndo_fcoe_disable(real_dev); 629 return rc; 630 } 631 632 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 633 { 634 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 635 const struct net_device_ops *ops = real_dev->netdev_ops; 636 int rc = -EINVAL; 637 638 if (ops->ndo_fcoe_get_wwn) 639 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 640 return rc; 641 } 642 #endif 643 644 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 645 { 646 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 647 648 if (change & IFF_ALLMULTI) 649 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 650 if (change & IFF_PROMISC) 651 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 652 } 653 654 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 655 { 656 dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 657 dev_unicast_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev); 658 } 659 660 /* 661 * vlan network devices have devices nesting below it, and are a special 662 * "super class" of normal network devices; split their locks off into a 663 * separate class since they always nest. 664 */ 665 static struct lock_class_key vlan_netdev_xmit_lock_key; 666 static struct lock_class_key vlan_netdev_addr_lock_key; 667 668 static void vlan_dev_set_lockdep_one(struct net_device *dev, 669 struct netdev_queue *txq, 670 void *_subclass) 671 { 672 lockdep_set_class_and_subclass(&txq->_xmit_lock, 673 &vlan_netdev_xmit_lock_key, 674 *(int *)_subclass); 675 } 676 677 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 678 { 679 lockdep_set_class_and_subclass(&dev->addr_list_lock, 680 &vlan_netdev_addr_lock_key, 681 subclass); 682 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 683 } 684 685 static const struct header_ops vlan_header_ops = { 686 .create = vlan_dev_hard_header, 687 .rebuild = vlan_dev_rebuild_header, 688 .parse = eth_header_parse, 689 }; 690 691 static const struct net_device_ops vlan_netdev_ops, vlan_netdev_accel_ops; 692 693 static int vlan_dev_init(struct net_device *dev) 694 { 695 struct net_device *real_dev = vlan_dev_info(dev)->real_dev; 696 int subclass = 0; 697 698 netif_carrier_off(dev); 699 700 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 701 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI); 702 dev->iflink = real_dev->ifindex; 703 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 704 (1<<__LINK_STATE_DORMANT))) | 705 (1<<__LINK_STATE_PRESENT); 706 707 dev->features |= real_dev->features & real_dev->vlan_features; 708 dev->gso_max_size = real_dev->gso_max_size; 709 710 /* ipv6 shared card related stuff */ 711 dev->dev_id = real_dev->dev_id; 712 713 if (is_zero_ether_addr(dev->dev_addr)) 714 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); 715 if (is_zero_ether_addr(dev->broadcast)) 716 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 717 718 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 719 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 720 #endif 721 722 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 723 dev->header_ops = real_dev->header_ops; 724 dev->hard_header_len = real_dev->hard_header_len; 725 dev->netdev_ops = &vlan_netdev_accel_ops; 726 } else { 727 dev->header_ops = &vlan_header_ops; 728 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 729 dev->netdev_ops = &vlan_netdev_ops; 730 } 731 732 if (is_vlan_dev(real_dev)) 733 subclass = 1; 734 735 vlan_dev_set_lockdep_class(dev, subclass); 736 737 vlan_dev_info(dev)->vlan_rx_stats = alloc_percpu(struct vlan_rx_stats); 738 if (!vlan_dev_info(dev)->vlan_rx_stats) 739 return -ENOMEM; 740 741 return 0; 742 } 743 744 static void vlan_dev_uninit(struct net_device *dev) 745 { 746 struct vlan_priority_tci_mapping *pm; 747 struct vlan_dev_info *vlan = vlan_dev_info(dev); 748 int i; 749 750 free_percpu(vlan->vlan_rx_stats); 751 vlan->vlan_rx_stats = NULL; 752 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 753 while ((pm = vlan->egress_priority_map[i]) != NULL) { 754 vlan->egress_priority_map[i] = pm->next; 755 kfree(pm); 756 } 757 } 758 } 759 760 static int vlan_ethtool_get_settings(struct net_device *dev, 761 struct ethtool_cmd *cmd) 762 { 763 const struct vlan_dev_info *vlan = vlan_dev_info(dev); 764 return dev_ethtool_get_settings(vlan->real_dev, cmd); 765 } 766 767 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 768 struct ethtool_drvinfo *info) 769 { 770 strcpy(info->driver, vlan_fullname); 771 strcpy(info->version, vlan_version); 772 strcpy(info->fw_version, "N/A"); 773 } 774 775 static u32 vlan_ethtool_get_rx_csum(struct net_device *dev) 776 { 777 const struct vlan_dev_info *vlan = vlan_dev_info(dev); 778 return dev_ethtool_get_rx_csum(vlan->real_dev); 779 } 780 781 static u32 vlan_ethtool_get_flags(struct net_device *dev) 782 { 783 const struct vlan_dev_info *vlan = vlan_dev_info(dev); 784 return dev_ethtool_get_flags(vlan->real_dev); 785 } 786 787 static struct net_device_stats *vlan_dev_get_stats(struct net_device *dev) 788 { 789 struct net_device_stats *stats = &dev->stats; 790 791 dev_txq_stats_fold(dev, stats); 792 793 if (vlan_dev_info(dev)->vlan_rx_stats) { 794 struct vlan_rx_stats *p, rx = {0}; 795 int i; 796 797 for_each_possible_cpu(i) { 798 p = per_cpu_ptr(vlan_dev_info(dev)->vlan_rx_stats, i); 799 rx.rx_packets += p->rx_packets; 800 rx.rx_bytes += p->rx_bytes; 801 rx.rx_errors += p->rx_errors; 802 rx.multicast += p->multicast; 803 } 804 stats->rx_packets = rx.rx_packets; 805 stats->rx_bytes = rx.rx_bytes; 806 stats->rx_errors = rx.rx_errors; 807 stats->multicast = rx.multicast; 808 } 809 return stats; 810 } 811 812 static const struct ethtool_ops vlan_ethtool_ops = { 813 .get_settings = vlan_ethtool_get_settings, 814 .get_drvinfo = vlan_ethtool_get_drvinfo, 815 .get_link = ethtool_op_get_link, 816 .get_rx_csum = vlan_ethtool_get_rx_csum, 817 .get_flags = vlan_ethtool_get_flags, 818 }; 819 820 static const struct net_device_ops vlan_netdev_ops = { 821 .ndo_change_mtu = vlan_dev_change_mtu, 822 .ndo_init = vlan_dev_init, 823 .ndo_uninit = vlan_dev_uninit, 824 .ndo_open = vlan_dev_open, 825 .ndo_stop = vlan_dev_stop, 826 .ndo_start_xmit = vlan_dev_hard_start_xmit, 827 .ndo_validate_addr = eth_validate_addr, 828 .ndo_set_mac_address = vlan_dev_set_mac_address, 829 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 830 .ndo_set_multicast_list = vlan_dev_set_rx_mode, 831 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 832 .ndo_do_ioctl = vlan_dev_ioctl, 833 .ndo_neigh_setup = vlan_dev_neigh_setup, 834 .ndo_get_stats = vlan_dev_get_stats, 835 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 836 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 837 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 838 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 839 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 840 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 841 #endif 842 }; 843 844 static const struct net_device_ops vlan_netdev_accel_ops = { 845 .ndo_change_mtu = vlan_dev_change_mtu, 846 .ndo_init = vlan_dev_init, 847 .ndo_uninit = vlan_dev_uninit, 848 .ndo_open = vlan_dev_open, 849 .ndo_stop = vlan_dev_stop, 850 .ndo_start_xmit = vlan_dev_hwaccel_hard_start_xmit, 851 .ndo_validate_addr = eth_validate_addr, 852 .ndo_set_mac_address = vlan_dev_set_mac_address, 853 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 854 .ndo_set_multicast_list = vlan_dev_set_rx_mode, 855 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 856 .ndo_do_ioctl = vlan_dev_ioctl, 857 .ndo_neigh_setup = vlan_dev_neigh_setup, 858 .ndo_get_stats = vlan_dev_get_stats, 859 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 860 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 861 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 862 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 863 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 864 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 865 #endif 866 }; 867 868 void vlan_setup(struct net_device *dev) 869 { 870 ether_setup(dev); 871 872 dev->priv_flags |= IFF_802_1Q_VLAN; 873 dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 874 dev->tx_queue_len = 0; 875 876 dev->netdev_ops = &vlan_netdev_ops; 877 dev->destructor = free_netdev; 878 dev->ethtool_ops = &vlan_ethtool_ops; 879 880 memset(dev->broadcast, 0, ETH_ALEN); 881 } 882