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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 24 25 #include <linux/module.h> 26 #include <linux/slab.h> 27 #include <linux/skbuff.h> 28 #include <linux/netdevice.h> 29 #include <linux/etherdevice.h> 30 #include <linux/ethtool.h> 31 #include <net/arp.h> 32 33 #include "vlan.h" 34 #include "vlanproc.h" 35 #include <linux/if_vlan.h> 36 #include <linux/netpoll.h> 37 38 /* 39 * Rebuild the Ethernet MAC header. This is called after an ARP 40 * (or in future other address resolution) has completed on this 41 * sk_buff. We now let ARP fill in the other fields. 42 * 43 * This routine CANNOT use cached dst->neigh! 44 * Really, it is used only when dst->neigh is wrong. 45 * 46 * TODO: This needs a checkup, I'm ignorant here. --BLG 47 */ 48 static int vlan_dev_rebuild_header(struct sk_buff *skb) 49 { 50 struct net_device *dev = skb->dev; 51 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 52 53 switch (veth->h_vlan_encapsulated_proto) { 54 #ifdef CONFIG_INET 55 case htons(ETH_P_IP): 56 57 /* TODO: Confirm this will work with VLAN headers... */ 58 return arp_find(veth->h_dest, skb); 59 #endif 60 default: 61 pr_debug("%s: unable to resolve type %X addresses\n", 62 dev->name, ntohs(veth->h_vlan_encapsulated_proto)); 63 64 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); 65 break; 66 } 67 68 return 0; 69 } 70 71 static inline u16 72 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) 73 { 74 struct vlan_priority_tci_mapping *mp; 75 76 mp = vlan_dev_priv(dev)->egress_priority_map[(skb->priority & 0xF)]; 77 while (mp) { 78 if (mp->priority == skb->priority) { 79 return mp->vlan_qos; /* This should already be shifted 80 * to mask correctly with the 81 * VLAN's TCI */ 82 } 83 mp = mp->next; 84 } 85 return 0; 86 } 87 88 /* 89 * Create the VLAN header for an arbitrary protocol layer 90 * 91 * saddr=NULL means use device source address 92 * daddr=NULL means leave destination address (eg unresolved arp) 93 * 94 * This is called when the SKB is moving down the stack towards the 95 * physical devices. 96 */ 97 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 98 unsigned short type, 99 const void *daddr, const void *saddr, 100 unsigned int len) 101 { 102 struct vlan_hdr *vhdr; 103 unsigned int vhdrlen = 0; 104 u16 vlan_tci = 0; 105 int rc; 106 107 if (!(vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR)) { 108 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 109 110 vlan_tci = vlan_dev_priv(dev)->vlan_id; 111 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 112 vhdr->h_vlan_TCI = htons(vlan_tci); 113 114 /* 115 * Set the protocol type. For a packet of type ETH_P_802_3/2 we 116 * put the length in here instead. 117 */ 118 if (type != ETH_P_802_3 && type != ETH_P_802_2) 119 vhdr->h_vlan_encapsulated_proto = htons(type); 120 else 121 vhdr->h_vlan_encapsulated_proto = htons(len); 122 123 skb->protocol = htons(ETH_P_8021Q); 124 type = ETH_P_8021Q; 125 vhdrlen = VLAN_HLEN; 126 } 127 128 /* Before delegating work to the lower layer, enter our MAC-address */ 129 if (saddr == NULL) 130 saddr = dev->dev_addr; 131 132 /* Now make the underlying real hard header */ 133 dev = vlan_dev_priv(dev)->real_dev; 134 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 135 if (rc > 0) 136 rc += vhdrlen; 137 return rc; 138 } 139 140 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) 141 { 142 #ifdef CONFIG_NET_POLL_CONTROLLER 143 if (vlan->netpoll) 144 netpoll_send_skb(vlan->netpoll, skb); 145 #else 146 BUG(); 147 #endif 148 return NETDEV_TX_OK; 149 } 150 151 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 152 struct net_device *dev) 153 { 154 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 155 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 156 unsigned int len; 157 int ret; 158 159 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 160 * 161 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 162 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 163 */ 164 if (veth->h_vlan_proto != htons(ETH_P_8021Q) || 165 vlan->flags & VLAN_FLAG_REORDER_HDR) { 166 u16 vlan_tci; 167 vlan_tci = vlan->vlan_id; 168 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 169 skb = __vlan_hwaccel_put_tag(skb, vlan_tci); 170 } 171 172 skb->dev = vlan->real_dev; 173 len = skb->len; 174 if (unlikely(netpoll_tx_running(dev))) 175 return vlan_netpoll_send_skb(vlan, skb); 176 177 ret = dev_queue_xmit(skb); 178 179 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { 180 struct vlan_pcpu_stats *stats; 181 182 stats = this_cpu_ptr(vlan->vlan_pcpu_stats); 183 u64_stats_update_begin(&stats->syncp); 184 stats->tx_packets++; 185 stats->tx_bytes += len; 186 u64_stats_update_end(&stats->syncp); 187 } else { 188 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); 189 } 190 191 return ret; 192 } 193 194 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 195 { 196 /* TODO: gotta make sure the underlying layer can handle it, 197 * maybe an IFF_VLAN_CAPABLE flag for devices? 198 */ 199 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) 200 return -ERANGE; 201 202 dev->mtu = new_mtu; 203 204 return 0; 205 } 206 207 void vlan_dev_set_ingress_priority(const struct net_device *dev, 208 u32 skb_prio, u16 vlan_prio) 209 { 210 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 211 212 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 213 vlan->nr_ingress_mappings--; 214 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 215 vlan->nr_ingress_mappings++; 216 217 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 218 } 219 220 int vlan_dev_set_egress_priority(const struct net_device *dev, 221 u32 skb_prio, u16 vlan_prio) 222 { 223 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 224 struct vlan_priority_tci_mapping *mp = NULL; 225 struct vlan_priority_tci_mapping *np; 226 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 227 228 /* See if a priority mapping exists.. */ 229 mp = vlan->egress_priority_map[skb_prio & 0xF]; 230 while (mp) { 231 if (mp->priority == skb_prio) { 232 if (mp->vlan_qos && !vlan_qos) 233 vlan->nr_egress_mappings--; 234 else if (!mp->vlan_qos && vlan_qos) 235 vlan->nr_egress_mappings++; 236 mp->vlan_qos = vlan_qos; 237 return 0; 238 } 239 mp = mp->next; 240 } 241 242 /* Create a new mapping then. */ 243 mp = vlan->egress_priority_map[skb_prio & 0xF]; 244 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 245 if (!np) 246 return -ENOBUFS; 247 248 np->next = mp; 249 np->priority = skb_prio; 250 np->vlan_qos = vlan_qos; 251 vlan->egress_priority_map[skb_prio & 0xF] = np; 252 if (vlan_qos) 253 vlan->nr_egress_mappings++; 254 return 0; 255 } 256 257 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 258 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 259 { 260 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 261 u32 old_flags = vlan->flags; 262 263 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 264 VLAN_FLAG_LOOSE_BINDING)) 265 return -EINVAL; 266 267 vlan->flags = (old_flags & ~mask) | (flags & mask); 268 269 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 270 if (vlan->flags & VLAN_FLAG_GVRP) 271 vlan_gvrp_request_join(dev); 272 else 273 vlan_gvrp_request_leave(dev); 274 } 275 return 0; 276 } 277 278 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 279 { 280 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); 281 } 282 283 static int vlan_dev_open(struct net_device *dev) 284 { 285 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 286 struct net_device *real_dev = vlan->real_dev; 287 int err; 288 289 if (!(real_dev->flags & IFF_UP) && 290 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 291 return -ENETDOWN; 292 293 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { 294 err = dev_uc_add(real_dev, dev->dev_addr); 295 if (err < 0) 296 goto out; 297 } 298 299 if (dev->flags & IFF_ALLMULTI) { 300 err = dev_set_allmulti(real_dev, 1); 301 if (err < 0) 302 goto del_unicast; 303 } 304 if (dev->flags & IFF_PROMISC) { 305 err = dev_set_promiscuity(real_dev, 1); 306 if (err < 0) 307 goto clear_allmulti; 308 } 309 310 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 311 312 if (vlan->flags & VLAN_FLAG_GVRP) 313 vlan_gvrp_request_join(dev); 314 315 if (netif_carrier_ok(real_dev)) 316 netif_carrier_on(dev); 317 return 0; 318 319 clear_allmulti: 320 if (dev->flags & IFF_ALLMULTI) 321 dev_set_allmulti(real_dev, -1); 322 del_unicast: 323 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 324 dev_uc_del(real_dev, dev->dev_addr); 325 out: 326 netif_carrier_off(dev); 327 return err; 328 } 329 330 static int vlan_dev_stop(struct net_device *dev) 331 { 332 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 333 struct net_device *real_dev = vlan->real_dev; 334 335 dev_mc_unsync(real_dev, dev); 336 dev_uc_unsync(real_dev, dev); 337 if (dev->flags & IFF_ALLMULTI) 338 dev_set_allmulti(real_dev, -1); 339 if (dev->flags & IFF_PROMISC) 340 dev_set_promiscuity(real_dev, -1); 341 342 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 343 dev_uc_del(real_dev, dev->dev_addr); 344 345 netif_carrier_off(dev); 346 return 0; 347 } 348 349 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 350 { 351 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 352 struct sockaddr *addr = p; 353 int err; 354 355 if (!is_valid_ether_addr(addr->sa_data)) 356 return -EADDRNOTAVAIL; 357 358 if (!(dev->flags & IFF_UP)) 359 goto out; 360 361 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 362 err = dev_uc_add(real_dev, addr->sa_data); 363 if (err < 0) 364 return err; 365 } 366 367 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 368 dev_uc_del(real_dev, dev->dev_addr); 369 370 out: 371 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 372 return 0; 373 } 374 375 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 376 { 377 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 378 const struct net_device_ops *ops = real_dev->netdev_ops; 379 struct ifreq ifrr; 380 int err = -EOPNOTSUPP; 381 382 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 383 ifrr.ifr_ifru = ifr->ifr_ifru; 384 385 switch (cmd) { 386 case SIOCGMIIPHY: 387 case SIOCGMIIREG: 388 case SIOCSMIIREG: 389 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 390 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 391 break; 392 } 393 394 if (!err) 395 ifr->ifr_ifru = ifrr.ifr_ifru; 396 397 return err; 398 } 399 400 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 401 { 402 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 403 const struct net_device_ops *ops = real_dev->netdev_ops; 404 int err = 0; 405 406 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 407 err = ops->ndo_neigh_setup(real_dev, pa); 408 409 return err; 410 } 411 412 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 413 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 414 struct scatterlist *sgl, unsigned int sgc) 415 { 416 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 417 const struct net_device_ops *ops = real_dev->netdev_ops; 418 int rc = 0; 419 420 if (ops->ndo_fcoe_ddp_setup) 421 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 422 423 return rc; 424 } 425 426 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 427 { 428 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 429 const struct net_device_ops *ops = real_dev->netdev_ops; 430 int len = 0; 431 432 if (ops->ndo_fcoe_ddp_done) 433 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 434 435 return len; 436 } 437 438 static int vlan_dev_fcoe_enable(struct net_device *dev) 439 { 440 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 441 const struct net_device_ops *ops = real_dev->netdev_ops; 442 int rc = -EINVAL; 443 444 if (ops->ndo_fcoe_enable) 445 rc = ops->ndo_fcoe_enable(real_dev); 446 return rc; 447 } 448 449 static int vlan_dev_fcoe_disable(struct net_device *dev) 450 { 451 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 452 const struct net_device_ops *ops = real_dev->netdev_ops; 453 int rc = -EINVAL; 454 455 if (ops->ndo_fcoe_disable) 456 rc = ops->ndo_fcoe_disable(real_dev); 457 return rc; 458 } 459 460 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 461 { 462 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 463 const struct net_device_ops *ops = real_dev->netdev_ops; 464 int rc = -EINVAL; 465 466 if (ops->ndo_fcoe_get_wwn) 467 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 468 return rc; 469 } 470 471 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 472 struct scatterlist *sgl, unsigned int sgc) 473 { 474 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 475 const struct net_device_ops *ops = real_dev->netdev_ops; 476 int rc = 0; 477 478 if (ops->ndo_fcoe_ddp_target) 479 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 480 481 return rc; 482 } 483 #endif 484 485 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 486 { 487 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 488 489 if (dev->flags & IFF_UP) { 490 if (change & IFF_ALLMULTI) 491 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 492 if (change & IFF_PROMISC) 493 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 494 } 495 } 496 497 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 498 { 499 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 500 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 501 } 502 503 /* 504 * vlan network devices have devices nesting below it, and are a special 505 * "super class" of normal network devices; split their locks off into a 506 * separate class since they always nest. 507 */ 508 static struct lock_class_key vlan_netdev_xmit_lock_key; 509 static struct lock_class_key vlan_netdev_addr_lock_key; 510 511 static void vlan_dev_set_lockdep_one(struct net_device *dev, 512 struct netdev_queue *txq, 513 void *_subclass) 514 { 515 lockdep_set_class_and_subclass(&txq->_xmit_lock, 516 &vlan_netdev_xmit_lock_key, 517 *(int *)_subclass); 518 } 519 520 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 521 { 522 lockdep_set_class_and_subclass(&dev->addr_list_lock, 523 &vlan_netdev_addr_lock_key, 524 subclass); 525 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 526 } 527 528 static const struct header_ops vlan_header_ops = { 529 .create = vlan_dev_hard_header, 530 .rebuild = vlan_dev_rebuild_header, 531 .parse = eth_header_parse, 532 }; 533 534 static const struct net_device_ops vlan_netdev_ops; 535 536 static int vlan_dev_init(struct net_device *dev) 537 { 538 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 539 int subclass = 0; 540 541 netif_carrier_off(dev); 542 543 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 544 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 545 IFF_MASTER | IFF_SLAVE); 546 dev->iflink = real_dev->ifindex; 547 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 548 (1<<__LINK_STATE_DORMANT))) | 549 (1<<__LINK_STATE_PRESENT); 550 551 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | 552 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | 553 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | 554 NETIF_F_ALL_FCOE; 555 556 dev->features |= real_dev->vlan_features | NETIF_F_LLTX; 557 dev->gso_max_size = real_dev->gso_max_size; 558 559 /* ipv6 shared card related stuff */ 560 dev->dev_id = real_dev->dev_id; 561 562 if (is_zero_ether_addr(dev->dev_addr)) 563 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); 564 if (is_zero_ether_addr(dev->broadcast)) 565 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 566 567 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 568 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 569 #endif 570 571 dev->needed_headroom = real_dev->needed_headroom; 572 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 573 dev->header_ops = real_dev->header_ops; 574 dev->hard_header_len = real_dev->hard_header_len; 575 } else { 576 dev->header_ops = &vlan_header_ops; 577 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 578 } 579 580 dev->netdev_ops = &vlan_netdev_ops; 581 582 if (is_vlan_dev(real_dev)) 583 subclass = 1; 584 585 vlan_dev_set_lockdep_class(dev, subclass); 586 587 vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats); 588 if (!vlan_dev_priv(dev)->vlan_pcpu_stats) 589 return -ENOMEM; 590 591 return 0; 592 } 593 594 static void vlan_dev_uninit(struct net_device *dev) 595 { 596 struct vlan_priority_tci_mapping *pm; 597 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 598 int i; 599 600 free_percpu(vlan->vlan_pcpu_stats); 601 vlan->vlan_pcpu_stats = NULL; 602 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 603 while ((pm = vlan->egress_priority_map[i]) != NULL) { 604 vlan->egress_priority_map[i] = pm->next; 605 kfree(pm); 606 } 607 } 608 } 609 610 static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 611 netdev_features_t features) 612 { 613 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 614 u32 old_features = features; 615 616 features &= real_dev->vlan_features; 617 features |= NETIF_F_RXCSUM; 618 features &= real_dev->features; 619 620 features |= old_features & NETIF_F_SOFT_FEATURES; 621 features |= NETIF_F_LLTX; 622 623 return features; 624 } 625 626 static int vlan_ethtool_get_settings(struct net_device *dev, 627 struct ethtool_cmd *cmd) 628 { 629 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 630 631 return __ethtool_get_settings(vlan->real_dev, cmd); 632 } 633 634 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 635 struct ethtool_drvinfo *info) 636 { 637 strcpy(info->driver, vlan_fullname); 638 strcpy(info->version, vlan_version); 639 strcpy(info->fw_version, "N/A"); 640 } 641 642 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 643 { 644 645 if (vlan_dev_priv(dev)->vlan_pcpu_stats) { 646 struct vlan_pcpu_stats *p; 647 u32 rx_errors = 0, tx_dropped = 0; 648 int i; 649 650 for_each_possible_cpu(i) { 651 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 652 unsigned int start; 653 654 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); 655 do { 656 start = u64_stats_fetch_begin_bh(&p->syncp); 657 rxpackets = p->rx_packets; 658 rxbytes = p->rx_bytes; 659 rxmulticast = p->rx_multicast; 660 txpackets = p->tx_packets; 661 txbytes = p->tx_bytes; 662 } while (u64_stats_fetch_retry_bh(&p->syncp, start)); 663 664 stats->rx_packets += rxpackets; 665 stats->rx_bytes += rxbytes; 666 stats->multicast += rxmulticast; 667 stats->tx_packets += txpackets; 668 stats->tx_bytes += txbytes; 669 /* rx_errors & tx_dropped are u32 */ 670 rx_errors += p->rx_errors; 671 tx_dropped += p->tx_dropped; 672 } 673 stats->rx_errors = rx_errors; 674 stats->tx_dropped = tx_dropped; 675 } 676 return stats; 677 } 678 679 #ifdef CONFIG_NET_POLL_CONTROLLER 680 static void vlan_dev_poll_controller(struct net_device *dev) 681 { 682 return; 683 } 684 685 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo, 686 gfp_t gfp) 687 { 688 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 689 struct net_device *real_dev = vlan->real_dev; 690 struct netpoll *netpoll; 691 int err = 0; 692 693 netpoll = kzalloc(sizeof(*netpoll), gfp); 694 err = -ENOMEM; 695 if (!netpoll) 696 goto out; 697 698 err = __netpoll_setup(netpoll, real_dev, gfp); 699 if (err) { 700 kfree(netpoll); 701 goto out; 702 } 703 704 vlan->netpoll = netpoll; 705 706 out: 707 return err; 708 } 709 710 static void vlan_dev_netpoll_cleanup(struct net_device *dev) 711 { 712 struct vlan_dev_priv *vlan= vlan_dev_priv(dev); 713 struct netpoll *netpoll = vlan->netpoll; 714 715 if (!netpoll) 716 return; 717 718 vlan->netpoll = NULL; 719 720 __netpoll_free_rcu(netpoll); 721 } 722 #endif /* CONFIG_NET_POLL_CONTROLLER */ 723 724 static const struct ethtool_ops vlan_ethtool_ops = { 725 .get_settings = vlan_ethtool_get_settings, 726 .get_drvinfo = vlan_ethtool_get_drvinfo, 727 .get_link = ethtool_op_get_link, 728 }; 729 730 static const struct net_device_ops vlan_netdev_ops = { 731 .ndo_change_mtu = vlan_dev_change_mtu, 732 .ndo_init = vlan_dev_init, 733 .ndo_uninit = vlan_dev_uninit, 734 .ndo_open = vlan_dev_open, 735 .ndo_stop = vlan_dev_stop, 736 .ndo_start_xmit = vlan_dev_hard_start_xmit, 737 .ndo_validate_addr = eth_validate_addr, 738 .ndo_set_mac_address = vlan_dev_set_mac_address, 739 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 740 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 741 .ndo_do_ioctl = vlan_dev_ioctl, 742 .ndo_neigh_setup = vlan_dev_neigh_setup, 743 .ndo_get_stats64 = vlan_dev_get_stats64, 744 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 745 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 746 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 747 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 748 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 749 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 750 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 751 #endif 752 #ifdef CONFIG_NET_POLL_CONTROLLER 753 .ndo_poll_controller = vlan_dev_poll_controller, 754 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 755 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 756 #endif 757 .ndo_fix_features = vlan_dev_fix_features, 758 }; 759 760 void vlan_setup(struct net_device *dev) 761 { 762 ether_setup(dev); 763 764 dev->priv_flags |= IFF_802_1Q_VLAN; 765 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 766 dev->tx_queue_len = 0; 767 768 dev->netdev_ops = &vlan_netdev_ops; 769 dev->destructor = free_netdev; 770 dev->ethtool_ops = &vlan_ethtool_ops; 771 772 memset(dev->broadcast, 0, ETH_ALEN); 773 } 774