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 #include <net/switchdev.h> 34 35 #include "vlan.h" 36 #include "vlanproc.h" 37 #include <linux/if_vlan.h> 38 #include <linux/netpoll.h> 39 40 /* 41 * Create the VLAN header for an arbitrary protocol layer 42 * 43 * saddr=NULL means use device source address 44 * daddr=NULL means leave destination address (eg unresolved arp) 45 * 46 * This is called when the SKB is moving down the stack towards the 47 * physical devices. 48 */ 49 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 50 unsigned short type, 51 const void *daddr, const void *saddr, 52 unsigned int len) 53 { 54 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 55 struct vlan_hdr *vhdr; 56 unsigned int vhdrlen = 0; 57 u16 vlan_tci = 0; 58 int rc; 59 60 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { 61 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 62 63 vlan_tci = vlan->vlan_id; 64 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); 65 vhdr->h_vlan_TCI = htons(vlan_tci); 66 67 /* 68 * Set the protocol type. For a packet of type ETH_P_802_3/2 we 69 * put the length in here instead. 70 */ 71 if (type != ETH_P_802_3 && type != ETH_P_802_2) 72 vhdr->h_vlan_encapsulated_proto = htons(type); 73 else 74 vhdr->h_vlan_encapsulated_proto = htons(len); 75 76 skb->protocol = vlan->vlan_proto; 77 type = ntohs(vlan->vlan_proto); 78 vhdrlen = VLAN_HLEN; 79 } 80 81 /* Before delegating work to the lower layer, enter our MAC-address */ 82 if (saddr == NULL) 83 saddr = dev->dev_addr; 84 85 /* Now make the underlying real hard header */ 86 dev = vlan->real_dev; 87 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 88 if (rc > 0) 89 rc += vhdrlen; 90 return rc; 91 } 92 93 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) 94 { 95 #ifdef CONFIG_NET_POLL_CONTROLLER 96 if (vlan->netpoll) 97 netpoll_send_skb(vlan->netpoll, skb); 98 #else 99 BUG(); 100 #endif 101 return NETDEV_TX_OK; 102 } 103 104 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 105 struct net_device *dev) 106 { 107 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 108 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 109 unsigned int len; 110 int ret; 111 112 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 113 * 114 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 115 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 116 */ 117 if (veth->h_vlan_proto != vlan->vlan_proto || 118 vlan->flags & VLAN_FLAG_REORDER_HDR) { 119 u16 vlan_tci; 120 vlan_tci = vlan->vlan_id; 121 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); 122 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); 123 } 124 125 skb->dev = vlan->real_dev; 126 len = skb->len; 127 if (unlikely(netpoll_tx_running(dev))) 128 return vlan_netpoll_send_skb(vlan, skb); 129 130 ret = dev_queue_xmit(skb); 131 132 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { 133 struct vlan_pcpu_stats *stats; 134 135 stats = this_cpu_ptr(vlan->vlan_pcpu_stats); 136 u64_stats_update_begin(&stats->syncp); 137 stats->tx_packets++; 138 stats->tx_bytes += len; 139 u64_stats_update_end(&stats->syncp); 140 } else { 141 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); 142 } 143 144 return ret; 145 } 146 147 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 148 { 149 /* TODO: gotta make sure the underlying layer can handle it, 150 * maybe an IFF_VLAN_CAPABLE flag for devices? 151 */ 152 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) 153 return -ERANGE; 154 155 dev->mtu = new_mtu; 156 157 return 0; 158 } 159 160 void vlan_dev_set_ingress_priority(const struct net_device *dev, 161 u32 skb_prio, u16 vlan_prio) 162 { 163 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 164 165 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 166 vlan->nr_ingress_mappings--; 167 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 168 vlan->nr_ingress_mappings++; 169 170 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 171 } 172 173 int vlan_dev_set_egress_priority(const struct net_device *dev, 174 u32 skb_prio, u16 vlan_prio) 175 { 176 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 177 struct vlan_priority_tci_mapping *mp = NULL; 178 struct vlan_priority_tci_mapping *np; 179 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 180 181 /* See if a priority mapping exists.. */ 182 mp = vlan->egress_priority_map[skb_prio & 0xF]; 183 while (mp) { 184 if (mp->priority == skb_prio) { 185 if (mp->vlan_qos && !vlan_qos) 186 vlan->nr_egress_mappings--; 187 else if (!mp->vlan_qos && vlan_qos) 188 vlan->nr_egress_mappings++; 189 mp->vlan_qos = vlan_qos; 190 return 0; 191 } 192 mp = mp->next; 193 } 194 195 /* Create a new mapping then. */ 196 mp = vlan->egress_priority_map[skb_prio & 0xF]; 197 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 198 if (!np) 199 return -ENOBUFS; 200 201 np->next = mp; 202 np->priority = skb_prio; 203 np->vlan_qos = vlan_qos; 204 /* Before inserting this element in hash table, make sure all its fields 205 * are committed to memory. 206 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() 207 */ 208 smp_wmb(); 209 vlan->egress_priority_map[skb_prio & 0xF] = np; 210 if (vlan_qos) 211 vlan->nr_egress_mappings++; 212 return 0; 213 } 214 215 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 216 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 217 { 218 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 219 u32 old_flags = vlan->flags; 220 221 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 222 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) 223 return -EINVAL; 224 225 vlan->flags = (old_flags & ~mask) | (flags & mask); 226 227 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 228 if (vlan->flags & VLAN_FLAG_GVRP) 229 vlan_gvrp_request_join(dev); 230 else 231 vlan_gvrp_request_leave(dev); 232 } 233 234 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { 235 if (vlan->flags & VLAN_FLAG_MVRP) 236 vlan_mvrp_request_join(dev); 237 else 238 vlan_mvrp_request_leave(dev); 239 } 240 return 0; 241 } 242 243 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 244 { 245 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); 246 } 247 248 static int vlan_dev_open(struct net_device *dev) 249 { 250 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 251 struct net_device *real_dev = vlan->real_dev; 252 int err; 253 254 if (!(real_dev->flags & IFF_UP) && 255 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 256 return -ENETDOWN; 257 258 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { 259 err = dev_uc_add(real_dev, dev->dev_addr); 260 if (err < 0) 261 goto out; 262 } 263 264 if (dev->flags & IFF_ALLMULTI) { 265 err = dev_set_allmulti(real_dev, 1); 266 if (err < 0) 267 goto del_unicast; 268 } 269 if (dev->flags & IFF_PROMISC) { 270 err = dev_set_promiscuity(real_dev, 1); 271 if (err < 0) 272 goto clear_allmulti; 273 } 274 275 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); 276 277 if (vlan->flags & VLAN_FLAG_GVRP) 278 vlan_gvrp_request_join(dev); 279 280 if (vlan->flags & VLAN_FLAG_MVRP) 281 vlan_mvrp_request_join(dev); 282 283 if (netif_carrier_ok(real_dev)) 284 netif_carrier_on(dev); 285 return 0; 286 287 clear_allmulti: 288 if (dev->flags & IFF_ALLMULTI) 289 dev_set_allmulti(real_dev, -1); 290 del_unicast: 291 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 292 dev_uc_del(real_dev, dev->dev_addr); 293 out: 294 netif_carrier_off(dev); 295 return err; 296 } 297 298 static int vlan_dev_stop(struct net_device *dev) 299 { 300 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 301 struct net_device *real_dev = vlan->real_dev; 302 303 dev_mc_unsync(real_dev, dev); 304 dev_uc_unsync(real_dev, dev); 305 if (dev->flags & IFF_ALLMULTI) 306 dev_set_allmulti(real_dev, -1); 307 if (dev->flags & IFF_PROMISC) 308 dev_set_promiscuity(real_dev, -1); 309 310 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 311 dev_uc_del(real_dev, dev->dev_addr); 312 313 netif_carrier_off(dev); 314 return 0; 315 } 316 317 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 318 { 319 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 320 struct sockaddr *addr = p; 321 int err; 322 323 if (!is_valid_ether_addr(addr->sa_data)) 324 return -EADDRNOTAVAIL; 325 326 if (!(dev->flags & IFF_UP)) 327 goto out; 328 329 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 330 err = dev_uc_add(real_dev, addr->sa_data); 331 if (err < 0) 332 return err; 333 } 334 335 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 336 dev_uc_del(real_dev, dev->dev_addr); 337 338 out: 339 ether_addr_copy(dev->dev_addr, addr->sa_data); 340 return 0; 341 } 342 343 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 344 { 345 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 346 const struct net_device_ops *ops = real_dev->netdev_ops; 347 struct ifreq ifrr; 348 int err = -EOPNOTSUPP; 349 350 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 351 ifrr.ifr_ifru = ifr->ifr_ifru; 352 353 switch (cmd) { 354 case SIOCGMIIPHY: 355 case SIOCGMIIREG: 356 case SIOCSMIIREG: 357 case SIOCSHWTSTAMP: 358 case SIOCGHWTSTAMP: 359 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 360 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 361 break; 362 } 363 364 if (!err) 365 ifr->ifr_ifru = ifrr.ifr_ifru; 366 367 return err; 368 } 369 370 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 371 { 372 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 373 const struct net_device_ops *ops = real_dev->netdev_ops; 374 int err = 0; 375 376 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 377 err = ops->ndo_neigh_setup(real_dev, pa); 378 379 return err; 380 } 381 382 #if IS_ENABLED(CONFIG_FCOE) 383 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 384 struct scatterlist *sgl, unsigned int sgc) 385 { 386 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 387 const struct net_device_ops *ops = real_dev->netdev_ops; 388 int rc = 0; 389 390 if (ops->ndo_fcoe_ddp_setup) 391 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 392 393 return rc; 394 } 395 396 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 397 { 398 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 399 const struct net_device_ops *ops = real_dev->netdev_ops; 400 int len = 0; 401 402 if (ops->ndo_fcoe_ddp_done) 403 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 404 405 return len; 406 } 407 408 static int vlan_dev_fcoe_enable(struct net_device *dev) 409 { 410 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 411 const struct net_device_ops *ops = real_dev->netdev_ops; 412 int rc = -EINVAL; 413 414 if (ops->ndo_fcoe_enable) 415 rc = ops->ndo_fcoe_enable(real_dev); 416 return rc; 417 } 418 419 static int vlan_dev_fcoe_disable(struct net_device *dev) 420 { 421 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 422 const struct net_device_ops *ops = real_dev->netdev_ops; 423 int rc = -EINVAL; 424 425 if (ops->ndo_fcoe_disable) 426 rc = ops->ndo_fcoe_disable(real_dev); 427 return rc; 428 } 429 430 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 431 { 432 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 433 const struct net_device_ops *ops = real_dev->netdev_ops; 434 int rc = -EINVAL; 435 436 if (ops->ndo_fcoe_get_wwn) 437 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 438 return rc; 439 } 440 441 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 442 struct scatterlist *sgl, unsigned int sgc) 443 { 444 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 445 const struct net_device_ops *ops = real_dev->netdev_ops; 446 int rc = 0; 447 448 if (ops->ndo_fcoe_ddp_target) 449 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 450 451 return rc; 452 } 453 #endif 454 455 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 456 { 457 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 458 459 if (dev->flags & IFF_UP) { 460 if (change & IFF_ALLMULTI) 461 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 462 if (change & IFF_PROMISC) 463 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 464 } 465 } 466 467 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 468 { 469 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 470 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 471 } 472 473 /* 474 * vlan network devices have devices nesting below it, and are a special 475 * "super class" of normal network devices; split their locks off into a 476 * separate class since they always nest. 477 */ 478 static struct lock_class_key vlan_netdev_xmit_lock_key; 479 static struct lock_class_key vlan_netdev_addr_lock_key; 480 481 static void vlan_dev_set_lockdep_one(struct net_device *dev, 482 struct netdev_queue *txq, 483 void *_subclass) 484 { 485 lockdep_set_class_and_subclass(&txq->_xmit_lock, 486 &vlan_netdev_xmit_lock_key, 487 *(int *)_subclass); 488 } 489 490 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 491 { 492 lockdep_set_class_and_subclass(&dev->addr_list_lock, 493 &vlan_netdev_addr_lock_key, 494 subclass); 495 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 496 } 497 498 static int vlan_dev_get_lock_subclass(struct net_device *dev) 499 { 500 return vlan_dev_priv(dev)->nest_level; 501 } 502 503 static const struct header_ops vlan_header_ops = { 504 .create = vlan_dev_hard_header, 505 .parse = eth_header_parse, 506 }; 507 508 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, 509 unsigned short type, 510 const void *daddr, const void *saddr, 511 unsigned int len) 512 { 513 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 514 struct net_device *real_dev = vlan->real_dev; 515 516 if (saddr == NULL) 517 saddr = dev->dev_addr; 518 519 return dev_hard_header(skb, real_dev, type, daddr, saddr, len); 520 } 521 522 static const struct header_ops vlan_passthru_header_ops = { 523 .create = vlan_passthru_hard_header, 524 .parse = eth_header_parse, 525 }; 526 527 static struct device_type vlan_type = { 528 .name = "vlan", 529 }; 530 531 static const struct net_device_ops vlan_netdev_ops; 532 533 static int vlan_dev_init(struct net_device *dev) 534 { 535 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 536 537 netif_carrier_off(dev); 538 539 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 540 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 541 IFF_MASTER | IFF_SLAVE); 542 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 543 (1<<__LINK_STATE_DORMANT))) | 544 (1<<__LINK_STATE_PRESENT); 545 546 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | 547 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | 548 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC | 549 NETIF_F_ALL_FCOE; 550 551 dev->features |= real_dev->vlan_features | NETIF_F_LLTX | 552 NETIF_F_GSO_SOFTWARE; 553 dev->gso_max_size = real_dev->gso_max_size; 554 dev->gso_max_segs = real_dev->gso_max_segs; 555 if (dev->features & NETIF_F_VLAN_FEATURES) 556 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); 557 558 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; 559 560 /* ipv6 shared card related stuff */ 561 dev->dev_id = real_dev->dev_id; 562 563 if (is_zero_ether_addr(dev->dev_addr)) 564 eth_hw_addr_inherit(dev, real_dev); 565 if (is_zero_ether_addr(dev->broadcast)) 566 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 567 568 #if IS_ENABLED(CONFIG_FCOE) 569 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 570 #endif 571 572 dev->needed_headroom = real_dev->needed_headroom; 573 if (vlan_hw_offload_capable(real_dev->features, 574 vlan_dev_priv(dev)->vlan_proto)) { 575 dev->header_ops = &vlan_passthru_header_ops; 576 dev->hard_header_len = real_dev->hard_header_len; 577 } else { 578 dev->header_ops = &vlan_header_ops; 579 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 580 } 581 582 dev->netdev_ops = &vlan_netdev_ops; 583 584 SET_NETDEV_DEVTYPE(dev, &vlan_type); 585 586 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); 587 588 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); 589 if (!vlan_dev_priv(dev)->vlan_pcpu_stats) 590 return -ENOMEM; 591 592 return 0; 593 } 594 595 static void vlan_dev_uninit(struct net_device *dev) 596 { 597 struct vlan_priority_tci_mapping *pm; 598 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 599 int i; 600 601 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 602 while ((pm = vlan->egress_priority_map[i]) != NULL) { 603 vlan->egress_priority_map[i] = pm->next; 604 kfree(pm); 605 } 606 } 607 } 608 609 static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 610 netdev_features_t features) 611 { 612 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 613 netdev_features_t old_features = features; 614 615 features = netdev_intersect_features(features, real_dev->vlan_features); 616 features |= NETIF_F_RXCSUM; 617 features = netdev_intersect_features(features, real_dev->features); 618 619 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); 620 features |= NETIF_F_LLTX; 621 622 return features; 623 } 624 625 static int vlan_ethtool_get_link_ksettings(struct net_device *dev, 626 struct ethtool_link_ksettings *cmd) 627 { 628 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 629 630 return __ethtool_get_link_ksettings(vlan->real_dev, cmd); 631 } 632 633 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 634 struct ethtool_drvinfo *info) 635 { 636 strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); 637 strlcpy(info->version, vlan_version, sizeof(info->version)); 638 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 639 } 640 641 static int vlan_ethtool_get_ts_info(struct net_device *dev, 642 struct ethtool_ts_info *info) 643 { 644 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 645 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; 646 647 if (ops->get_ts_info) { 648 return ops->get_ts_info(vlan->real_dev, info); 649 } else { 650 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | 651 SOF_TIMESTAMPING_SOFTWARE; 652 info->phc_index = -1; 653 } 654 655 return 0; 656 } 657 658 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 659 { 660 struct vlan_pcpu_stats *p; 661 u32 rx_errors = 0, tx_dropped = 0; 662 int i; 663 664 for_each_possible_cpu(i) { 665 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 666 unsigned int start; 667 668 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); 669 do { 670 start = u64_stats_fetch_begin_irq(&p->syncp); 671 rxpackets = p->rx_packets; 672 rxbytes = p->rx_bytes; 673 rxmulticast = p->rx_multicast; 674 txpackets = p->tx_packets; 675 txbytes = p->tx_bytes; 676 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 677 678 stats->rx_packets += rxpackets; 679 stats->rx_bytes += rxbytes; 680 stats->multicast += rxmulticast; 681 stats->tx_packets += txpackets; 682 stats->tx_bytes += txbytes; 683 /* rx_errors & tx_dropped are u32 */ 684 rx_errors += p->rx_errors; 685 tx_dropped += p->tx_dropped; 686 } 687 stats->rx_errors = rx_errors; 688 stats->tx_dropped = tx_dropped; 689 690 return stats; 691 } 692 693 #ifdef CONFIG_NET_POLL_CONTROLLER 694 static void vlan_dev_poll_controller(struct net_device *dev) 695 { 696 return; 697 } 698 699 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) 700 { 701 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 702 struct net_device *real_dev = vlan->real_dev; 703 struct netpoll *netpoll; 704 int err = 0; 705 706 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 707 err = -ENOMEM; 708 if (!netpoll) 709 goto out; 710 711 err = __netpoll_setup(netpoll, real_dev); 712 if (err) { 713 kfree(netpoll); 714 goto out; 715 } 716 717 vlan->netpoll = netpoll; 718 719 out: 720 return err; 721 } 722 723 static void vlan_dev_netpoll_cleanup(struct net_device *dev) 724 { 725 struct vlan_dev_priv *vlan= vlan_dev_priv(dev); 726 struct netpoll *netpoll = vlan->netpoll; 727 728 if (!netpoll) 729 return; 730 731 vlan->netpoll = NULL; 732 733 __netpoll_free_async(netpoll); 734 } 735 #endif /* CONFIG_NET_POLL_CONTROLLER */ 736 737 static int vlan_dev_get_iflink(const struct net_device *dev) 738 { 739 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 740 741 return real_dev->ifindex; 742 } 743 744 static const struct ethtool_ops vlan_ethtool_ops = { 745 .get_link_ksettings = vlan_ethtool_get_link_ksettings, 746 .get_drvinfo = vlan_ethtool_get_drvinfo, 747 .get_link = ethtool_op_get_link, 748 .get_ts_info = vlan_ethtool_get_ts_info, 749 }; 750 751 static const struct net_device_ops vlan_netdev_ops = { 752 .ndo_change_mtu = vlan_dev_change_mtu, 753 .ndo_init = vlan_dev_init, 754 .ndo_uninit = vlan_dev_uninit, 755 .ndo_open = vlan_dev_open, 756 .ndo_stop = vlan_dev_stop, 757 .ndo_start_xmit = vlan_dev_hard_start_xmit, 758 .ndo_validate_addr = eth_validate_addr, 759 .ndo_set_mac_address = vlan_dev_set_mac_address, 760 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 761 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 762 .ndo_do_ioctl = vlan_dev_ioctl, 763 .ndo_neigh_setup = vlan_dev_neigh_setup, 764 .ndo_get_stats64 = vlan_dev_get_stats64, 765 #if IS_ENABLED(CONFIG_FCOE) 766 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 767 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 768 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 769 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 770 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 771 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 772 #endif 773 #ifdef CONFIG_NET_POLL_CONTROLLER 774 .ndo_poll_controller = vlan_dev_poll_controller, 775 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 776 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 777 #endif 778 .ndo_fix_features = vlan_dev_fix_features, 779 .ndo_fdb_add = switchdev_port_fdb_add, 780 .ndo_fdb_del = switchdev_port_fdb_del, 781 .ndo_fdb_dump = switchdev_port_fdb_dump, 782 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 783 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 784 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 785 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, 786 .ndo_get_iflink = vlan_dev_get_iflink, 787 }; 788 789 static void vlan_dev_free(struct net_device *dev) 790 { 791 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 792 793 free_percpu(vlan->vlan_pcpu_stats); 794 vlan->vlan_pcpu_stats = NULL; 795 free_netdev(dev); 796 } 797 798 void vlan_setup(struct net_device *dev) 799 { 800 ether_setup(dev); 801 802 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE; 803 dev->priv_flags |= IFF_UNICAST_FLT; 804 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 805 netif_keep_dst(dev); 806 807 dev->netdev_ops = &vlan_netdev_ops; 808 dev->destructor = vlan_dev_free; 809 dev->ethtool_ops = &vlan_ethtool_ops; 810 811 eth_zero_addr(dev->broadcast); 812 } 813