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_dev_priv *vlan = vlan_dev_priv(dev); 103 struct vlan_hdr *vhdr; 104 unsigned int vhdrlen = 0; 105 u16 vlan_tci = 0; 106 int rc; 107 108 if (!(vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR)) { 109 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 110 111 vlan_tci = vlan_dev_priv(dev)->vlan_id; 112 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 113 vhdr->h_vlan_TCI = htons(vlan_tci); 114 115 /* 116 * Set the protocol type. For a packet of type ETH_P_802_3/2 we 117 * put the length in here instead. 118 */ 119 if (type != ETH_P_802_3 && type != ETH_P_802_2) 120 vhdr->h_vlan_encapsulated_proto = htons(type); 121 else 122 vhdr->h_vlan_encapsulated_proto = htons(len); 123 124 skb->protocol = vlan->vlan_proto; 125 type = ntohs(vlan->vlan_proto); 126 vhdrlen = VLAN_HLEN; 127 } 128 129 /* Before delegating work to the lower layer, enter our MAC-address */ 130 if (saddr == NULL) 131 saddr = dev->dev_addr; 132 133 /* Now make the underlying real hard header */ 134 dev = vlan_dev_priv(dev)->real_dev; 135 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 136 if (rc > 0) 137 rc += vhdrlen; 138 return rc; 139 } 140 141 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) 142 { 143 #ifdef CONFIG_NET_POLL_CONTROLLER 144 if (vlan->netpoll) 145 netpoll_send_skb(vlan->netpoll, skb); 146 #else 147 BUG(); 148 #endif 149 return NETDEV_TX_OK; 150 } 151 152 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 153 struct net_device *dev) 154 { 155 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 156 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 157 unsigned int len; 158 int ret; 159 160 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 161 * 162 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 163 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 164 */ 165 if (veth->h_vlan_proto != vlan->vlan_proto || 166 vlan->flags & VLAN_FLAG_REORDER_HDR) { 167 u16 vlan_tci; 168 vlan_tci = vlan->vlan_id; 169 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); 170 skb = __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); 171 } 172 173 skb->dev = vlan->real_dev; 174 len = skb->len; 175 if (unlikely(netpoll_tx_running(dev))) 176 return vlan_netpoll_send_skb(vlan, skb); 177 178 ret = dev_queue_xmit(skb); 179 180 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { 181 struct vlan_pcpu_stats *stats; 182 183 stats = this_cpu_ptr(vlan->vlan_pcpu_stats); 184 u64_stats_update_begin(&stats->syncp); 185 stats->tx_packets++; 186 stats->tx_bytes += len; 187 u64_stats_update_end(&stats->syncp); 188 } else { 189 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); 190 } 191 192 return ret; 193 } 194 195 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 196 { 197 /* TODO: gotta make sure the underlying layer can handle it, 198 * maybe an IFF_VLAN_CAPABLE flag for devices? 199 */ 200 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) 201 return -ERANGE; 202 203 dev->mtu = new_mtu; 204 205 return 0; 206 } 207 208 void vlan_dev_set_ingress_priority(const struct net_device *dev, 209 u32 skb_prio, u16 vlan_prio) 210 { 211 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 212 213 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 214 vlan->nr_ingress_mappings--; 215 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 216 vlan->nr_ingress_mappings++; 217 218 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 219 } 220 221 int vlan_dev_set_egress_priority(const struct net_device *dev, 222 u32 skb_prio, u16 vlan_prio) 223 { 224 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 225 struct vlan_priority_tci_mapping *mp = NULL; 226 struct vlan_priority_tci_mapping *np; 227 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 228 229 /* See if a priority mapping exists.. */ 230 mp = vlan->egress_priority_map[skb_prio & 0xF]; 231 while (mp) { 232 if (mp->priority == skb_prio) { 233 if (mp->vlan_qos && !vlan_qos) 234 vlan->nr_egress_mappings--; 235 else if (!mp->vlan_qos && vlan_qos) 236 vlan->nr_egress_mappings++; 237 mp->vlan_qos = vlan_qos; 238 return 0; 239 } 240 mp = mp->next; 241 } 242 243 /* Create a new mapping then. */ 244 mp = vlan->egress_priority_map[skb_prio & 0xF]; 245 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 246 if (!np) 247 return -ENOBUFS; 248 249 np->next = mp; 250 np->priority = skb_prio; 251 np->vlan_qos = vlan_qos; 252 vlan->egress_priority_map[skb_prio & 0xF] = np; 253 if (vlan_qos) 254 vlan->nr_egress_mappings++; 255 return 0; 256 } 257 258 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 259 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 260 { 261 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 262 u32 old_flags = vlan->flags; 263 264 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 265 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) 266 return -EINVAL; 267 268 vlan->flags = (old_flags & ~mask) | (flags & mask); 269 270 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 271 if (vlan->flags & VLAN_FLAG_GVRP) 272 vlan_gvrp_request_join(dev); 273 else 274 vlan_gvrp_request_leave(dev); 275 } 276 277 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { 278 if (vlan->flags & VLAN_FLAG_MVRP) 279 vlan_mvrp_request_join(dev); 280 else 281 vlan_mvrp_request_leave(dev); 282 } 283 return 0; 284 } 285 286 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 287 { 288 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); 289 } 290 291 static int vlan_dev_open(struct net_device *dev) 292 { 293 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 294 struct net_device *real_dev = vlan->real_dev; 295 int err; 296 297 if (!(real_dev->flags & IFF_UP) && 298 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 299 return -ENETDOWN; 300 301 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { 302 err = dev_uc_add(real_dev, dev->dev_addr); 303 if (err < 0) 304 goto out; 305 } 306 307 if (dev->flags & IFF_ALLMULTI) { 308 err = dev_set_allmulti(real_dev, 1); 309 if (err < 0) 310 goto del_unicast; 311 } 312 if (dev->flags & IFF_PROMISC) { 313 err = dev_set_promiscuity(real_dev, 1); 314 if (err < 0) 315 goto clear_allmulti; 316 } 317 318 memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); 319 320 if (vlan->flags & VLAN_FLAG_GVRP) 321 vlan_gvrp_request_join(dev); 322 323 if (vlan->flags & VLAN_FLAG_MVRP) 324 vlan_mvrp_request_join(dev); 325 326 if (netif_carrier_ok(real_dev)) 327 netif_carrier_on(dev); 328 return 0; 329 330 clear_allmulti: 331 if (dev->flags & IFF_ALLMULTI) 332 dev_set_allmulti(real_dev, -1); 333 del_unicast: 334 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 335 dev_uc_del(real_dev, dev->dev_addr); 336 out: 337 netif_carrier_off(dev); 338 return err; 339 } 340 341 static int vlan_dev_stop(struct net_device *dev) 342 { 343 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 344 struct net_device *real_dev = vlan->real_dev; 345 346 dev_mc_unsync(real_dev, dev); 347 dev_uc_unsync(real_dev, dev); 348 if (dev->flags & IFF_ALLMULTI) 349 dev_set_allmulti(real_dev, -1); 350 if (dev->flags & IFF_PROMISC) 351 dev_set_promiscuity(real_dev, -1); 352 353 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 354 dev_uc_del(real_dev, dev->dev_addr); 355 356 netif_carrier_off(dev); 357 return 0; 358 } 359 360 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 361 { 362 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 363 struct sockaddr *addr = p; 364 int err; 365 366 if (!is_valid_ether_addr(addr->sa_data)) 367 return -EADDRNOTAVAIL; 368 369 if (!(dev->flags & IFF_UP)) 370 goto out; 371 372 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 373 err = dev_uc_add(real_dev, addr->sa_data); 374 if (err < 0) 375 return err; 376 } 377 378 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 379 dev_uc_del(real_dev, dev->dev_addr); 380 381 out: 382 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 383 return 0; 384 } 385 386 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 387 { 388 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 389 const struct net_device_ops *ops = real_dev->netdev_ops; 390 struct ifreq ifrr; 391 int err = -EOPNOTSUPP; 392 393 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 394 ifrr.ifr_ifru = ifr->ifr_ifru; 395 396 switch (cmd) { 397 case SIOCGMIIPHY: 398 case SIOCGMIIREG: 399 case SIOCSMIIREG: 400 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 401 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 402 break; 403 } 404 405 if (!err) 406 ifr->ifr_ifru = ifrr.ifr_ifru; 407 408 return err; 409 } 410 411 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 412 { 413 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 414 const struct net_device_ops *ops = real_dev->netdev_ops; 415 int err = 0; 416 417 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 418 err = ops->ndo_neigh_setup(real_dev, pa); 419 420 return err; 421 } 422 423 #if IS_ENABLED(CONFIG_FCOE) 424 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 425 struct scatterlist *sgl, unsigned int sgc) 426 { 427 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 428 const struct net_device_ops *ops = real_dev->netdev_ops; 429 int rc = 0; 430 431 if (ops->ndo_fcoe_ddp_setup) 432 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 433 434 return rc; 435 } 436 437 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 438 { 439 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 440 const struct net_device_ops *ops = real_dev->netdev_ops; 441 int len = 0; 442 443 if (ops->ndo_fcoe_ddp_done) 444 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 445 446 return len; 447 } 448 449 static int vlan_dev_fcoe_enable(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_enable) 456 rc = ops->ndo_fcoe_enable(real_dev); 457 return rc; 458 } 459 460 static int vlan_dev_fcoe_disable(struct net_device *dev) 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_disable) 467 rc = ops->ndo_fcoe_disable(real_dev); 468 return rc; 469 } 470 471 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 472 { 473 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 474 const struct net_device_ops *ops = real_dev->netdev_ops; 475 int rc = -EINVAL; 476 477 if (ops->ndo_fcoe_get_wwn) 478 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 479 return rc; 480 } 481 482 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 483 struct scatterlist *sgl, unsigned int sgc) 484 { 485 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 486 const struct net_device_ops *ops = real_dev->netdev_ops; 487 int rc = 0; 488 489 if (ops->ndo_fcoe_ddp_target) 490 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 491 492 return rc; 493 } 494 #endif 495 496 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 497 { 498 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 499 500 if (dev->flags & IFF_UP) { 501 if (change & IFF_ALLMULTI) 502 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 503 if (change & IFF_PROMISC) 504 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 505 } 506 } 507 508 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 509 { 510 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 511 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 512 } 513 514 /* 515 * vlan network devices have devices nesting below it, and are a special 516 * "super class" of normal network devices; split their locks off into a 517 * separate class since they always nest. 518 */ 519 static struct lock_class_key vlan_netdev_xmit_lock_key; 520 static struct lock_class_key vlan_netdev_addr_lock_key; 521 522 static void vlan_dev_set_lockdep_one(struct net_device *dev, 523 struct netdev_queue *txq, 524 void *_subclass) 525 { 526 lockdep_set_class_and_subclass(&txq->_xmit_lock, 527 &vlan_netdev_xmit_lock_key, 528 *(int *)_subclass); 529 } 530 531 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 532 { 533 lockdep_set_class_and_subclass(&dev->addr_list_lock, 534 &vlan_netdev_addr_lock_key, 535 subclass); 536 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 537 } 538 539 static const struct header_ops vlan_header_ops = { 540 .create = vlan_dev_hard_header, 541 .rebuild = vlan_dev_rebuild_header, 542 .parse = eth_header_parse, 543 }; 544 545 static struct device_type vlan_type = { 546 .name = "vlan", 547 }; 548 549 static const struct net_device_ops vlan_netdev_ops; 550 551 static int vlan_dev_init(struct net_device *dev) 552 { 553 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 554 int subclass = 0; 555 556 netif_carrier_off(dev); 557 558 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 559 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 560 IFF_MASTER | IFF_SLAVE); 561 dev->iflink = real_dev->ifindex; 562 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 563 (1<<__LINK_STATE_DORMANT))) | 564 (1<<__LINK_STATE_PRESENT); 565 566 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | 567 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | 568 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | 569 NETIF_F_ALL_FCOE; 570 571 dev->features |= real_dev->vlan_features | NETIF_F_LLTX; 572 dev->gso_max_size = real_dev->gso_max_size; 573 574 /* ipv6 shared card related stuff */ 575 dev->dev_id = real_dev->dev_id; 576 577 if (is_zero_ether_addr(dev->dev_addr)) 578 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); 579 if (is_zero_ether_addr(dev->broadcast)) 580 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 581 582 #if IS_ENABLED(CONFIG_FCOE) 583 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 584 #endif 585 586 dev->needed_headroom = real_dev->needed_headroom; 587 if (real_dev->features & NETIF_F_HW_VLAN_CTAG_TX) { 588 dev->header_ops = real_dev->header_ops; 589 dev->hard_header_len = real_dev->hard_header_len; 590 } else { 591 dev->header_ops = &vlan_header_ops; 592 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 593 } 594 595 dev->netdev_ops = &vlan_netdev_ops; 596 597 SET_NETDEV_DEVTYPE(dev, &vlan_type); 598 599 if (is_vlan_dev(real_dev)) 600 subclass = 1; 601 602 vlan_dev_set_lockdep_class(dev, subclass); 603 604 vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats); 605 if (!vlan_dev_priv(dev)->vlan_pcpu_stats) 606 return -ENOMEM; 607 608 return 0; 609 } 610 611 static void vlan_dev_uninit(struct net_device *dev) 612 { 613 struct vlan_priority_tci_mapping *pm; 614 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 615 int i; 616 617 free_percpu(vlan->vlan_pcpu_stats); 618 vlan->vlan_pcpu_stats = NULL; 619 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 620 while ((pm = vlan->egress_priority_map[i]) != NULL) { 621 vlan->egress_priority_map[i] = pm->next; 622 kfree(pm); 623 } 624 } 625 } 626 627 static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 628 netdev_features_t features) 629 { 630 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 631 netdev_features_t old_features = features; 632 633 features &= real_dev->vlan_features; 634 features |= NETIF_F_RXCSUM; 635 features &= real_dev->features; 636 637 features |= old_features & NETIF_F_SOFT_FEATURES; 638 features |= NETIF_F_LLTX; 639 640 return features; 641 } 642 643 static int vlan_ethtool_get_settings(struct net_device *dev, 644 struct ethtool_cmd *cmd) 645 { 646 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 647 648 return __ethtool_get_settings(vlan->real_dev, cmd); 649 } 650 651 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 652 struct ethtool_drvinfo *info) 653 { 654 strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); 655 strlcpy(info->version, vlan_version, sizeof(info->version)); 656 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 657 } 658 659 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 660 { 661 662 if (vlan_dev_priv(dev)->vlan_pcpu_stats) { 663 struct vlan_pcpu_stats *p; 664 u32 rx_errors = 0, tx_dropped = 0; 665 int i; 666 667 for_each_possible_cpu(i) { 668 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 669 unsigned int start; 670 671 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); 672 do { 673 start = u64_stats_fetch_begin_bh(&p->syncp); 674 rxpackets = p->rx_packets; 675 rxbytes = p->rx_bytes; 676 rxmulticast = p->rx_multicast; 677 txpackets = p->tx_packets; 678 txbytes = p->tx_bytes; 679 } while (u64_stats_fetch_retry_bh(&p->syncp, start)); 680 681 stats->rx_packets += rxpackets; 682 stats->rx_bytes += rxbytes; 683 stats->multicast += rxmulticast; 684 stats->tx_packets += txpackets; 685 stats->tx_bytes += txbytes; 686 /* rx_errors & tx_dropped are u32 */ 687 rx_errors += p->rx_errors; 688 tx_dropped += p->tx_dropped; 689 } 690 stats->rx_errors = rx_errors; 691 stats->tx_dropped = tx_dropped; 692 } 693 return stats; 694 } 695 696 #ifdef CONFIG_NET_POLL_CONTROLLER 697 static void vlan_dev_poll_controller(struct net_device *dev) 698 { 699 return; 700 } 701 702 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo, 703 gfp_t gfp) 704 { 705 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 706 struct net_device *real_dev = vlan->real_dev; 707 struct netpoll *netpoll; 708 int err = 0; 709 710 netpoll = kzalloc(sizeof(*netpoll), gfp); 711 err = -ENOMEM; 712 if (!netpoll) 713 goto out; 714 715 err = __netpoll_setup(netpoll, real_dev, gfp); 716 if (err) { 717 kfree(netpoll); 718 goto out; 719 } 720 721 vlan->netpoll = netpoll; 722 723 out: 724 return err; 725 } 726 727 static void vlan_dev_netpoll_cleanup(struct net_device *dev) 728 { 729 struct vlan_dev_priv *vlan= vlan_dev_priv(dev); 730 struct netpoll *netpoll = vlan->netpoll; 731 732 if (!netpoll) 733 return; 734 735 vlan->netpoll = NULL; 736 737 __netpoll_free_async(netpoll); 738 } 739 #endif /* CONFIG_NET_POLL_CONTROLLER */ 740 741 static const struct ethtool_ops vlan_ethtool_ops = { 742 .get_settings = vlan_ethtool_get_settings, 743 .get_drvinfo = vlan_ethtool_get_drvinfo, 744 .get_link = ethtool_op_get_link, 745 }; 746 747 static const struct net_device_ops vlan_netdev_ops = { 748 .ndo_change_mtu = vlan_dev_change_mtu, 749 .ndo_init = vlan_dev_init, 750 .ndo_uninit = vlan_dev_uninit, 751 .ndo_open = vlan_dev_open, 752 .ndo_stop = vlan_dev_stop, 753 .ndo_start_xmit = vlan_dev_hard_start_xmit, 754 .ndo_validate_addr = eth_validate_addr, 755 .ndo_set_mac_address = vlan_dev_set_mac_address, 756 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 757 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 758 .ndo_do_ioctl = vlan_dev_ioctl, 759 .ndo_neigh_setup = vlan_dev_neigh_setup, 760 .ndo_get_stats64 = vlan_dev_get_stats64, 761 #if IS_ENABLED(CONFIG_FCOE) 762 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 763 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 764 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 765 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 766 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 767 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 768 #endif 769 #ifdef CONFIG_NET_POLL_CONTROLLER 770 .ndo_poll_controller = vlan_dev_poll_controller, 771 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 772 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 773 #endif 774 .ndo_fix_features = vlan_dev_fix_features, 775 }; 776 777 void vlan_setup(struct net_device *dev) 778 { 779 ether_setup(dev); 780 781 dev->priv_flags |= IFF_802_1Q_VLAN; 782 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 783 dev->tx_queue_len = 0; 784 785 dev->netdev_ops = &vlan_netdev_ops; 786 dev->destructor = free_netdev; 787 dev->ethtool_ops = &vlan_ethtool_ops; 788 789 memset(dev->broadcast, 0, ETH_ALEN); 790 } 791