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/net_tstamp.h> 30 #include <linux/etherdevice.h> 31 #include <linux/ethtool.h> 32 #include <net/arp.h> 33 34 #include "vlan.h" 35 #include "vlanproc.h" 36 #include <linux/if_vlan.h> 37 #include <linux/netpoll.h> 38 39 /* 40 * Create the VLAN header for an arbitrary protocol layer 41 * 42 * saddr=NULL means use device source address 43 * daddr=NULL means leave destination address (eg unresolved arp) 44 * 45 * This is called when the SKB is moving down the stack towards the 46 * physical devices. 47 */ 48 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 49 unsigned short type, 50 const void *daddr, const void *saddr, 51 unsigned int len) 52 { 53 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 54 struct vlan_hdr *vhdr; 55 unsigned int vhdrlen = 0; 56 u16 vlan_tci = 0; 57 int rc; 58 59 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { 60 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 61 62 vlan_tci = vlan->vlan_id; 63 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); 64 vhdr->h_vlan_TCI = htons(vlan_tci); 65 66 /* 67 * Set the protocol type. For a packet of type ETH_P_802_3/2 we 68 * put the length in here instead. 69 */ 70 if (type != ETH_P_802_3 && type != ETH_P_802_2) 71 vhdr->h_vlan_encapsulated_proto = htons(type); 72 else 73 vhdr->h_vlan_encapsulated_proto = htons(len); 74 75 skb->protocol = vlan->vlan_proto; 76 type = ntohs(vlan->vlan_proto); 77 vhdrlen = VLAN_HLEN; 78 } 79 80 /* Before delegating work to the lower layer, enter our MAC-address */ 81 if (saddr == NULL) 82 saddr = dev->dev_addr; 83 84 /* Now make the underlying real hard header */ 85 dev = vlan->real_dev; 86 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 87 if (rc > 0) 88 rc += vhdrlen; 89 return rc; 90 } 91 92 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) 93 { 94 #ifdef CONFIG_NET_POLL_CONTROLLER 95 if (vlan->netpoll) 96 netpoll_send_skb(vlan->netpoll, skb); 97 #else 98 BUG(); 99 #endif 100 return NETDEV_TX_OK; 101 } 102 103 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 104 struct net_device *dev) 105 { 106 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 107 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 108 unsigned int len; 109 int ret; 110 111 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 112 * 113 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 114 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 115 */ 116 if (veth->h_vlan_proto != vlan->vlan_proto || 117 vlan->flags & VLAN_FLAG_REORDER_HDR) { 118 u16 vlan_tci; 119 vlan_tci = vlan->vlan_id; 120 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); 121 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); 122 } 123 124 skb->dev = vlan->real_dev; 125 len = skb->len; 126 if (unlikely(netpoll_tx_running(dev))) 127 return vlan_netpoll_send_skb(vlan, skb); 128 129 ret = dev_queue_xmit(skb); 130 131 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { 132 struct vlan_pcpu_stats *stats; 133 134 stats = this_cpu_ptr(vlan->vlan_pcpu_stats); 135 u64_stats_update_begin(&stats->syncp); 136 stats->tx_packets++; 137 stats->tx_bytes += len; 138 u64_stats_update_end(&stats->syncp); 139 } else { 140 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); 141 } 142 143 return ret; 144 } 145 146 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 147 { 148 /* TODO: gotta make sure the underlying layer can handle it, 149 * maybe an IFF_VLAN_CAPABLE flag for devices? 150 */ 151 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) 152 return -ERANGE; 153 154 dev->mtu = new_mtu; 155 156 return 0; 157 } 158 159 void vlan_dev_set_ingress_priority(const struct net_device *dev, 160 u32 skb_prio, u16 vlan_prio) 161 { 162 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 163 164 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 165 vlan->nr_ingress_mappings--; 166 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 167 vlan->nr_ingress_mappings++; 168 169 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 170 } 171 172 int vlan_dev_set_egress_priority(const struct net_device *dev, 173 u32 skb_prio, u16 vlan_prio) 174 { 175 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 176 struct vlan_priority_tci_mapping *mp = NULL; 177 struct vlan_priority_tci_mapping *np; 178 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 179 180 /* See if a priority mapping exists.. */ 181 mp = vlan->egress_priority_map[skb_prio & 0xF]; 182 while (mp) { 183 if (mp->priority == skb_prio) { 184 if (mp->vlan_qos && !vlan_qos) 185 vlan->nr_egress_mappings--; 186 else if (!mp->vlan_qos && vlan_qos) 187 vlan->nr_egress_mappings++; 188 mp->vlan_qos = vlan_qos; 189 return 0; 190 } 191 mp = mp->next; 192 } 193 194 /* Create a new mapping then. */ 195 mp = vlan->egress_priority_map[skb_prio & 0xF]; 196 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 197 if (!np) 198 return -ENOBUFS; 199 200 np->next = mp; 201 np->priority = skb_prio; 202 np->vlan_qos = vlan_qos; 203 /* Before inserting this element in hash table, make sure all its fields 204 * are committed to memory. 205 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() 206 */ 207 smp_wmb(); 208 vlan->egress_priority_map[skb_prio & 0xF] = np; 209 if (vlan_qos) 210 vlan->nr_egress_mappings++; 211 return 0; 212 } 213 214 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 215 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 216 { 217 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 218 u32 old_flags = vlan->flags; 219 220 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 221 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) 222 return -EINVAL; 223 224 vlan->flags = (old_flags & ~mask) | (flags & mask); 225 226 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 227 if (vlan->flags & VLAN_FLAG_GVRP) 228 vlan_gvrp_request_join(dev); 229 else 230 vlan_gvrp_request_leave(dev); 231 } 232 233 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { 234 if (vlan->flags & VLAN_FLAG_MVRP) 235 vlan_mvrp_request_join(dev); 236 else 237 vlan_mvrp_request_leave(dev); 238 } 239 return 0; 240 } 241 242 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 243 { 244 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); 245 } 246 247 static int vlan_dev_open(struct net_device *dev) 248 { 249 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 250 struct net_device *real_dev = vlan->real_dev; 251 int err; 252 253 if (!(real_dev->flags & IFF_UP) && 254 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 255 return -ENETDOWN; 256 257 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { 258 err = dev_uc_add(real_dev, dev->dev_addr); 259 if (err < 0) 260 goto out; 261 } 262 263 if (dev->flags & IFF_ALLMULTI) { 264 err = dev_set_allmulti(real_dev, 1); 265 if (err < 0) 266 goto del_unicast; 267 } 268 if (dev->flags & IFF_PROMISC) { 269 err = dev_set_promiscuity(real_dev, 1); 270 if (err < 0) 271 goto clear_allmulti; 272 } 273 274 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); 275 276 if (vlan->flags & VLAN_FLAG_GVRP) 277 vlan_gvrp_request_join(dev); 278 279 if (vlan->flags & VLAN_FLAG_MVRP) 280 vlan_mvrp_request_join(dev); 281 282 if (netif_carrier_ok(real_dev)) 283 netif_carrier_on(dev); 284 return 0; 285 286 clear_allmulti: 287 if (dev->flags & IFF_ALLMULTI) 288 dev_set_allmulti(real_dev, -1); 289 del_unicast: 290 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 291 dev_uc_del(real_dev, dev->dev_addr); 292 out: 293 netif_carrier_off(dev); 294 return err; 295 } 296 297 static int vlan_dev_stop(struct net_device *dev) 298 { 299 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 300 struct net_device *real_dev = vlan->real_dev; 301 302 dev_mc_unsync(real_dev, dev); 303 dev_uc_unsync(real_dev, dev); 304 if (dev->flags & IFF_ALLMULTI) 305 dev_set_allmulti(real_dev, -1); 306 if (dev->flags & IFF_PROMISC) 307 dev_set_promiscuity(real_dev, -1); 308 309 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 310 dev_uc_del(real_dev, dev->dev_addr); 311 312 netif_carrier_off(dev); 313 return 0; 314 } 315 316 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 317 { 318 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 319 struct sockaddr *addr = p; 320 int err; 321 322 if (!is_valid_ether_addr(addr->sa_data)) 323 return -EADDRNOTAVAIL; 324 325 if (!(dev->flags & IFF_UP)) 326 goto out; 327 328 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 329 err = dev_uc_add(real_dev, addr->sa_data); 330 if (err < 0) 331 return err; 332 } 333 334 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 335 dev_uc_del(real_dev, dev->dev_addr); 336 337 out: 338 ether_addr_copy(dev->dev_addr, addr->sa_data); 339 return 0; 340 } 341 342 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 343 { 344 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 345 const struct net_device_ops *ops = real_dev->netdev_ops; 346 struct ifreq ifrr; 347 int err = -EOPNOTSUPP; 348 349 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 350 ifrr.ifr_ifru = ifr->ifr_ifru; 351 352 switch (cmd) { 353 case SIOCGMIIPHY: 354 case SIOCGMIIREG: 355 case SIOCSMIIREG: 356 case SIOCSHWTSTAMP: 357 case SIOCGHWTSTAMP: 358 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 359 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 360 break; 361 } 362 363 if (!err) 364 ifr->ifr_ifru = ifrr.ifr_ifru; 365 366 return err; 367 } 368 369 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 370 { 371 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 372 const struct net_device_ops *ops = real_dev->netdev_ops; 373 int err = 0; 374 375 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 376 err = ops->ndo_neigh_setup(real_dev, pa); 377 378 return err; 379 } 380 381 #if IS_ENABLED(CONFIG_FCOE) 382 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 383 struct scatterlist *sgl, unsigned int sgc) 384 { 385 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 386 const struct net_device_ops *ops = real_dev->netdev_ops; 387 int rc = 0; 388 389 if (ops->ndo_fcoe_ddp_setup) 390 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 391 392 return rc; 393 } 394 395 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 396 { 397 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 398 const struct net_device_ops *ops = real_dev->netdev_ops; 399 int len = 0; 400 401 if (ops->ndo_fcoe_ddp_done) 402 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 403 404 return len; 405 } 406 407 static int vlan_dev_fcoe_enable(struct net_device *dev) 408 { 409 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 410 const struct net_device_ops *ops = real_dev->netdev_ops; 411 int rc = -EINVAL; 412 413 if (ops->ndo_fcoe_enable) 414 rc = ops->ndo_fcoe_enable(real_dev); 415 return rc; 416 } 417 418 static int vlan_dev_fcoe_disable(struct net_device *dev) 419 { 420 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 421 const struct net_device_ops *ops = real_dev->netdev_ops; 422 int rc = -EINVAL; 423 424 if (ops->ndo_fcoe_disable) 425 rc = ops->ndo_fcoe_disable(real_dev); 426 return rc; 427 } 428 429 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 430 { 431 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 432 const struct net_device_ops *ops = real_dev->netdev_ops; 433 int rc = -EINVAL; 434 435 if (ops->ndo_fcoe_get_wwn) 436 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 437 return rc; 438 } 439 440 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 441 struct scatterlist *sgl, unsigned int sgc) 442 { 443 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 444 const struct net_device_ops *ops = real_dev->netdev_ops; 445 int rc = 0; 446 447 if (ops->ndo_fcoe_ddp_target) 448 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 449 450 return rc; 451 } 452 #endif 453 454 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 455 { 456 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 457 458 if (dev->flags & IFF_UP) { 459 if (change & IFF_ALLMULTI) 460 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 461 if (change & IFF_PROMISC) 462 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 463 } 464 } 465 466 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 467 { 468 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 469 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 470 } 471 472 /* 473 * vlan network devices have devices nesting below it, and are a special 474 * "super class" of normal network devices; split their locks off into a 475 * separate class since they always nest. 476 */ 477 static struct lock_class_key vlan_netdev_xmit_lock_key; 478 static struct lock_class_key vlan_netdev_addr_lock_key; 479 480 static void vlan_dev_set_lockdep_one(struct net_device *dev, 481 struct netdev_queue *txq, 482 void *_subclass) 483 { 484 lockdep_set_class_and_subclass(&txq->_xmit_lock, 485 &vlan_netdev_xmit_lock_key, 486 *(int *)_subclass); 487 } 488 489 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 490 { 491 lockdep_set_class_and_subclass(&dev->addr_list_lock, 492 &vlan_netdev_addr_lock_key, 493 subclass); 494 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 495 } 496 497 static int vlan_dev_get_lock_subclass(struct net_device *dev) 498 { 499 return vlan_dev_priv(dev)->nest_level; 500 } 501 502 static const struct header_ops vlan_header_ops = { 503 .create = vlan_dev_hard_header, 504 .parse = eth_header_parse, 505 }; 506 507 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, 508 unsigned short type, 509 const void *daddr, const void *saddr, 510 unsigned int len) 511 { 512 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 513 struct net_device *real_dev = vlan->real_dev; 514 515 if (saddr == NULL) 516 saddr = dev->dev_addr; 517 518 return dev_hard_header(skb, real_dev, type, daddr, saddr, len); 519 } 520 521 static const struct header_ops vlan_passthru_header_ops = { 522 .create = vlan_passthru_hard_header, 523 .parse = eth_header_parse, 524 }; 525 526 static struct device_type vlan_type = { 527 .name = "vlan", 528 }; 529 530 static const struct net_device_ops vlan_netdev_ops; 531 532 static int vlan_dev_init(struct net_device *dev) 533 { 534 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 535 536 netif_carrier_off(dev); 537 538 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 539 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 540 IFF_MASTER | IFF_SLAVE); 541 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 542 (1<<__LINK_STATE_DORMANT))) | 543 (1<<__LINK_STATE_PRESENT); 544 545 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | 546 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | 547 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | 548 NETIF_F_ALL_FCOE; 549 550 dev->features |= real_dev->vlan_features | NETIF_F_LLTX | 551 NETIF_F_GSO_SOFTWARE; 552 dev->gso_max_size = real_dev->gso_max_size; 553 if (dev->features & NETIF_F_VLAN_FEATURES) 554 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); 555 556 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; 557 558 /* ipv6 shared card related stuff */ 559 dev->dev_id = real_dev->dev_id; 560 561 if (is_zero_ether_addr(dev->dev_addr)) 562 eth_hw_addr_inherit(dev, real_dev); 563 if (is_zero_ether_addr(dev->broadcast)) 564 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 565 566 #if IS_ENABLED(CONFIG_FCOE) 567 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 568 #endif 569 570 dev->needed_headroom = real_dev->needed_headroom; 571 if (vlan_hw_offload_capable(real_dev->features, 572 vlan_dev_priv(dev)->vlan_proto)) { 573 dev->header_ops = &vlan_passthru_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 SET_NETDEV_DEVTYPE(dev, &vlan_type); 583 584 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); 585 586 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); 587 if (!vlan_dev_priv(dev)->vlan_pcpu_stats) 588 return -ENOMEM; 589 590 return 0; 591 } 592 593 static void vlan_dev_uninit(struct net_device *dev) 594 { 595 struct vlan_priority_tci_mapping *pm; 596 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 597 int i; 598 599 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 600 while ((pm = vlan->egress_priority_map[i]) != NULL) { 601 vlan->egress_priority_map[i] = pm->next; 602 kfree(pm); 603 } 604 } 605 } 606 607 static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 608 netdev_features_t features) 609 { 610 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 611 netdev_features_t old_features = features; 612 613 features = netdev_intersect_features(features, real_dev->vlan_features); 614 features |= NETIF_F_RXCSUM; 615 features = netdev_intersect_features(features, real_dev->features); 616 617 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); 618 features |= NETIF_F_LLTX; 619 620 return features; 621 } 622 623 static int vlan_ethtool_get_settings(struct net_device *dev, 624 struct ethtool_cmd *cmd) 625 { 626 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 627 628 return __ethtool_get_settings(vlan->real_dev, cmd); 629 } 630 631 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 632 struct ethtool_drvinfo *info) 633 { 634 strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); 635 strlcpy(info->version, vlan_version, sizeof(info->version)); 636 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 637 } 638 639 static int vlan_ethtool_get_ts_info(struct net_device *dev, 640 struct ethtool_ts_info *info) 641 { 642 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 643 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; 644 645 if (ops->get_ts_info) { 646 return ops->get_ts_info(vlan->real_dev, info); 647 } else { 648 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | 649 SOF_TIMESTAMPING_SOFTWARE; 650 info->phc_index = -1; 651 } 652 653 return 0; 654 } 655 656 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 657 { 658 struct vlan_pcpu_stats *p; 659 u32 rx_errors = 0, tx_dropped = 0; 660 int i; 661 662 for_each_possible_cpu(i) { 663 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 664 unsigned int start; 665 666 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); 667 do { 668 start = u64_stats_fetch_begin_irq(&p->syncp); 669 rxpackets = p->rx_packets; 670 rxbytes = p->rx_bytes; 671 rxmulticast = p->rx_multicast; 672 txpackets = p->tx_packets; 673 txbytes = p->tx_bytes; 674 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 675 676 stats->rx_packets += rxpackets; 677 stats->rx_bytes += rxbytes; 678 stats->multicast += rxmulticast; 679 stats->tx_packets += txpackets; 680 stats->tx_bytes += txbytes; 681 /* rx_errors & tx_dropped are u32 */ 682 rx_errors += p->rx_errors; 683 tx_dropped += p->tx_dropped; 684 } 685 stats->rx_errors = rx_errors; 686 stats->tx_dropped = tx_dropped; 687 688 return stats; 689 } 690 691 #ifdef CONFIG_NET_POLL_CONTROLLER 692 static void vlan_dev_poll_controller(struct net_device *dev) 693 { 694 return; 695 } 696 697 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) 698 { 699 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 700 struct net_device *real_dev = vlan->real_dev; 701 struct netpoll *netpoll; 702 int err = 0; 703 704 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 705 err = -ENOMEM; 706 if (!netpoll) 707 goto out; 708 709 err = __netpoll_setup(netpoll, real_dev); 710 if (err) { 711 kfree(netpoll); 712 goto out; 713 } 714 715 vlan->netpoll = netpoll; 716 717 out: 718 return err; 719 } 720 721 static void vlan_dev_netpoll_cleanup(struct net_device *dev) 722 { 723 struct vlan_dev_priv *vlan= vlan_dev_priv(dev); 724 struct netpoll *netpoll = vlan->netpoll; 725 726 if (!netpoll) 727 return; 728 729 vlan->netpoll = NULL; 730 731 __netpoll_free_async(netpoll); 732 } 733 #endif /* CONFIG_NET_POLL_CONTROLLER */ 734 735 static int vlan_dev_get_iflink(const struct net_device *dev) 736 { 737 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 738 739 return real_dev->ifindex; 740 } 741 742 static const struct ethtool_ops vlan_ethtool_ops = { 743 .get_settings = vlan_ethtool_get_settings, 744 .get_drvinfo = vlan_ethtool_get_drvinfo, 745 .get_link = ethtool_op_get_link, 746 .get_ts_info = vlan_ethtool_get_ts_info, 747 }; 748 749 static const struct net_device_ops vlan_netdev_ops = { 750 .ndo_change_mtu = vlan_dev_change_mtu, 751 .ndo_init = vlan_dev_init, 752 .ndo_uninit = vlan_dev_uninit, 753 .ndo_open = vlan_dev_open, 754 .ndo_stop = vlan_dev_stop, 755 .ndo_start_xmit = vlan_dev_hard_start_xmit, 756 .ndo_validate_addr = eth_validate_addr, 757 .ndo_set_mac_address = vlan_dev_set_mac_address, 758 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 759 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 760 .ndo_do_ioctl = vlan_dev_ioctl, 761 .ndo_neigh_setup = vlan_dev_neigh_setup, 762 .ndo_get_stats64 = vlan_dev_get_stats64, 763 #if IS_ENABLED(CONFIG_FCOE) 764 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 765 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 766 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 767 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 768 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 769 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 770 #endif 771 #ifdef CONFIG_NET_POLL_CONTROLLER 772 .ndo_poll_controller = vlan_dev_poll_controller, 773 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 774 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 775 #endif 776 .ndo_fix_features = vlan_dev_fix_features, 777 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, 778 .ndo_get_iflink = vlan_dev_get_iflink, 779 }; 780 781 static void vlan_dev_free(struct net_device *dev) 782 { 783 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 784 785 free_percpu(vlan->vlan_pcpu_stats); 786 vlan->vlan_pcpu_stats = NULL; 787 free_netdev(dev); 788 } 789 790 void vlan_setup(struct net_device *dev) 791 { 792 ether_setup(dev); 793 794 dev->priv_flags |= IFF_802_1Q_VLAN; 795 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 796 netif_keep_dst(dev); 797 dev->tx_queue_len = 0; 798 799 dev->netdev_ops = &vlan_netdev_ops; 800 dev->destructor = vlan_dev_free; 801 dev->ethtool_ops = &vlan_ethtool_ops; 802 803 eth_zero_addr(dev->broadcast); 804 } 805