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 bool vlan_dev_inherit_address(struct net_device *dev, 249 struct net_device *real_dev) 250 { 251 if (dev->addr_assign_type != NET_ADDR_STOLEN) 252 return false; 253 254 ether_addr_copy(dev->dev_addr, real_dev->dev_addr); 255 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 256 return true; 257 } 258 259 static int vlan_dev_open(struct net_device *dev) 260 { 261 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 262 struct net_device *real_dev = vlan->real_dev; 263 int err; 264 265 if (!(real_dev->flags & IFF_UP) && 266 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 267 return -ENETDOWN; 268 269 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) && 270 !vlan_dev_inherit_address(dev, real_dev)) { 271 err = dev_uc_add(real_dev, dev->dev_addr); 272 if (err < 0) 273 goto out; 274 } 275 276 if (dev->flags & IFF_ALLMULTI) { 277 err = dev_set_allmulti(real_dev, 1); 278 if (err < 0) 279 goto del_unicast; 280 } 281 if (dev->flags & IFF_PROMISC) { 282 err = dev_set_promiscuity(real_dev, 1); 283 if (err < 0) 284 goto clear_allmulti; 285 } 286 287 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); 288 289 if (vlan->flags & VLAN_FLAG_GVRP) 290 vlan_gvrp_request_join(dev); 291 292 if (vlan->flags & VLAN_FLAG_MVRP) 293 vlan_mvrp_request_join(dev); 294 295 if (netif_carrier_ok(real_dev)) 296 netif_carrier_on(dev); 297 return 0; 298 299 clear_allmulti: 300 if (dev->flags & IFF_ALLMULTI) 301 dev_set_allmulti(real_dev, -1); 302 del_unicast: 303 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 304 dev_uc_del(real_dev, dev->dev_addr); 305 out: 306 netif_carrier_off(dev); 307 return err; 308 } 309 310 static int vlan_dev_stop(struct net_device *dev) 311 { 312 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 313 struct net_device *real_dev = vlan->real_dev; 314 315 dev_mc_unsync(real_dev, dev); 316 dev_uc_unsync(real_dev, dev); 317 if (dev->flags & IFF_ALLMULTI) 318 dev_set_allmulti(real_dev, -1); 319 if (dev->flags & IFF_PROMISC) 320 dev_set_promiscuity(real_dev, -1); 321 322 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 323 dev_uc_del(real_dev, dev->dev_addr); 324 325 netif_carrier_off(dev); 326 return 0; 327 } 328 329 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 330 { 331 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 332 struct sockaddr *addr = p; 333 int err; 334 335 if (!is_valid_ether_addr(addr->sa_data)) 336 return -EADDRNOTAVAIL; 337 338 if (!(dev->flags & IFF_UP)) 339 goto out; 340 341 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 342 err = dev_uc_add(real_dev, addr->sa_data); 343 if (err < 0) 344 return err; 345 } 346 347 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 348 dev_uc_del(real_dev, dev->dev_addr); 349 350 out: 351 ether_addr_copy(dev->dev_addr, addr->sa_data); 352 return 0; 353 } 354 355 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 356 { 357 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 358 const struct net_device_ops *ops = real_dev->netdev_ops; 359 struct ifreq ifrr; 360 int err = -EOPNOTSUPP; 361 362 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 363 ifrr.ifr_ifru = ifr->ifr_ifru; 364 365 switch (cmd) { 366 case SIOCGMIIPHY: 367 case SIOCGMIIREG: 368 case SIOCSMIIREG: 369 case SIOCSHWTSTAMP: 370 case SIOCGHWTSTAMP: 371 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 372 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 373 break; 374 } 375 376 if (!err) 377 ifr->ifr_ifru = ifrr.ifr_ifru; 378 379 return err; 380 } 381 382 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 383 { 384 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 385 const struct net_device_ops *ops = real_dev->netdev_ops; 386 int err = 0; 387 388 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 389 err = ops->ndo_neigh_setup(real_dev, pa); 390 391 return err; 392 } 393 394 #if IS_ENABLED(CONFIG_FCOE) 395 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 396 struct scatterlist *sgl, unsigned int sgc) 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 rc = 0; 401 402 if (ops->ndo_fcoe_ddp_setup) 403 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 404 405 return rc; 406 } 407 408 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 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 len = 0; 413 414 if (ops->ndo_fcoe_ddp_done) 415 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 416 417 return len; 418 } 419 420 static int vlan_dev_fcoe_enable(struct net_device *dev) 421 { 422 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 423 const struct net_device_ops *ops = real_dev->netdev_ops; 424 int rc = -EINVAL; 425 426 if (ops->ndo_fcoe_enable) 427 rc = ops->ndo_fcoe_enable(real_dev); 428 return rc; 429 } 430 431 static int vlan_dev_fcoe_disable(struct net_device *dev) 432 { 433 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 434 const struct net_device_ops *ops = real_dev->netdev_ops; 435 int rc = -EINVAL; 436 437 if (ops->ndo_fcoe_disable) 438 rc = ops->ndo_fcoe_disable(real_dev); 439 return rc; 440 } 441 442 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 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 = -EINVAL; 447 448 if (ops->ndo_fcoe_get_wwn) 449 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 450 return rc; 451 } 452 453 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 454 struct scatterlist *sgl, unsigned int sgc) 455 { 456 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 457 const struct net_device_ops *ops = real_dev->netdev_ops; 458 int rc = 0; 459 460 if (ops->ndo_fcoe_ddp_target) 461 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 462 463 return rc; 464 } 465 #endif 466 467 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 468 { 469 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 470 471 if (dev->flags & IFF_UP) { 472 if (change & IFF_ALLMULTI) 473 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 474 if (change & IFF_PROMISC) 475 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 476 } 477 } 478 479 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 480 { 481 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 482 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 483 } 484 485 /* 486 * vlan network devices have devices nesting below it, and are a special 487 * "super class" of normal network devices; split their locks off into a 488 * separate class since they always nest. 489 */ 490 static struct lock_class_key vlan_netdev_xmit_lock_key; 491 static struct lock_class_key vlan_netdev_addr_lock_key; 492 493 static void vlan_dev_set_lockdep_one(struct net_device *dev, 494 struct netdev_queue *txq, 495 void *_subclass) 496 { 497 lockdep_set_class_and_subclass(&txq->_xmit_lock, 498 &vlan_netdev_xmit_lock_key, 499 *(int *)_subclass); 500 } 501 502 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 503 { 504 lockdep_set_class_and_subclass(&dev->addr_list_lock, 505 &vlan_netdev_addr_lock_key, 506 subclass); 507 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 508 } 509 510 static int vlan_dev_get_lock_subclass(struct net_device *dev) 511 { 512 return vlan_dev_priv(dev)->nest_level; 513 } 514 515 static const struct header_ops vlan_header_ops = { 516 .create = vlan_dev_hard_header, 517 .parse = eth_header_parse, 518 }; 519 520 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, 521 unsigned short type, 522 const void *daddr, const void *saddr, 523 unsigned int len) 524 { 525 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 526 struct net_device *real_dev = vlan->real_dev; 527 528 if (saddr == NULL) 529 saddr = dev->dev_addr; 530 531 return dev_hard_header(skb, real_dev, type, daddr, saddr, len); 532 } 533 534 static const struct header_ops vlan_passthru_header_ops = { 535 .create = vlan_passthru_hard_header, 536 .parse = eth_header_parse, 537 }; 538 539 static struct device_type vlan_type = { 540 .name = "vlan", 541 }; 542 543 static const struct net_device_ops vlan_netdev_ops; 544 545 static int vlan_dev_init(struct net_device *dev) 546 { 547 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 548 549 netif_carrier_off(dev); 550 551 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 552 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 553 IFF_MASTER | IFF_SLAVE); 554 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 555 (1<<__LINK_STATE_DORMANT))) | 556 (1<<__LINK_STATE_PRESENT); 557 558 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | 559 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | 560 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC | 561 NETIF_F_ALL_FCOE; 562 563 dev->features |= real_dev->vlan_features | NETIF_F_LLTX | 564 NETIF_F_GSO_SOFTWARE; 565 dev->gso_max_size = real_dev->gso_max_size; 566 dev->gso_max_segs = real_dev->gso_max_segs; 567 if (dev->features & NETIF_F_VLAN_FEATURES) 568 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); 569 570 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; 571 572 /* ipv6 shared card related stuff */ 573 dev->dev_id = real_dev->dev_id; 574 575 if (is_zero_ether_addr(dev->dev_addr)) { 576 ether_addr_copy(dev->dev_addr, real_dev->dev_addr); 577 dev->addr_assign_type = NET_ADDR_STOLEN; 578 } 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 (vlan_hw_offload_capable(real_dev->features, 588 vlan_dev_priv(dev)->vlan_proto)) { 589 dev->header_ops = &vlan_passthru_header_ops; 590 dev->hard_header_len = real_dev->hard_header_len; 591 } else { 592 dev->header_ops = &vlan_header_ops; 593 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 594 } 595 596 dev->netdev_ops = &vlan_netdev_ops; 597 598 SET_NETDEV_DEVTYPE(dev, &vlan_type); 599 600 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); 601 602 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); 603 if (!vlan_dev_priv(dev)->vlan_pcpu_stats) 604 return -ENOMEM; 605 606 return 0; 607 } 608 609 static void vlan_dev_uninit(struct net_device *dev) 610 { 611 struct vlan_priority_tci_mapping *pm; 612 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 613 int i; 614 615 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 616 while ((pm = vlan->egress_priority_map[i]) != NULL) { 617 vlan->egress_priority_map[i] = pm->next; 618 kfree(pm); 619 } 620 } 621 } 622 623 static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 624 netdev_features_t features) 625 { 626 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 627 netdev_features_t old_features = features; 628 629 features = netdev_intersect_features(features, real_dev->vlan_features); 630 features |= NETIF_F_RXCSUM; 631 features = netdev_intersect_features(features, real_dev->features); 632 633 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); 634 features |= NETIF_F_LLTX; 635 636 return features; 637 } 638 639 static int vlan_ethtool_get_link_ksettings(struct net_device *dev, 640 struct ethtool_link_ksettings *cmd) 641 { 642 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 643 644 return __ethtool_get_link_ksettings(vlan->real_dev, cmd); 645 } 646 647 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 648 struct ethtool_drvinfo *info) 649 { 650 strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); 651 strlcpy(info->version, vlan_version, sizeof(info->version)); 652 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 653 } 654 655 static int vlan_ethtool_get_ts_info(struct net_device *dev, 656 struct ethtool_ts_info *info) 657 { 658 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 659 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; 660 661 if (ops->get_ts_info) { 662 return ops->get_ts_info(vlan->real_dev, info); 663 } else { 664 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | 665 SOF_TIMESTAMPING_SOFTWARE; 666 info->phc_index = -1; 667 } 668 669 return 0; 670 } 671 672 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 673 { 674 struct vlan_pcpu_stats *p; 675 u32 rx_errors = 0, tx_dropped = 0; 676 int i; 677 678 for_each_possible_cpu(i) { 679 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 680 unsigned int start; 681 682 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); 683 do { 684 start = u64_stats_fetch_begin_irq(&p->syncp); 685 rxpackets = p->rx_packets; 686 rxbytes = p->rx_bytes; 687 rxmulticast = p->rx_multicast; 688 txpackets = p->tx_packets; 689 txbytes = p->tx_bytes; 690 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 691 692 stats->rx_packets += rxpackets; 693 stats->rx_bytes += rxbytes; 694 stats->multicast += rxmulticast; 695 stats->tx_packets += txpackets; 696 stats->tx_bytes += txbytes; 697 /* rx_errors & tx_dropped are u32 */ 698 rx_errors += p->rx_errors; 699 tx_dropped += p->tx_dropped; 700 } 701 stats->rx_errors = rx_errors; 702 stats->tx_dropped = tx_dropped; 703 704 return stats; 705 } 706 707 #ifdef CONFIG_NET_POLL_CONTROLLER 708 static void vlan_dev_poll_controller(struct net_device *dev) 709 { 710 return; 711 } 712 713 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) 714 { 715 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 716 struct net_device *real_dev = vlan->real_dev; 717 struct netpoll *netpoll; 718 int err = 0; 719 720 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 721 err = -ENOMEM; 722 if (!netpoll) 723 goto out; 724 725 err = __netpoll_setup(netpoll, real_dev); 726 if (err) { 727 kfree(netpoll); 728 goto out; 729 } 730 731 vlan->netpoll = netpoll; 732 733 out: 734 return err; 735 } 736 737 static void vlan_dev_netpoll_cleanup(struct net_device *dev) 738 { 739 struct vlan_dev_priv *vlan= vlan_dev_priv(dev); 740 struct netpoll *netpoll = vlan->netpoll; 741 742 if (!netpoll) 743 return; 744 745 vlan->netpoll = NULL; 746 747 __netpoll_free_async(netpoll); 748 } 749 #endif /* CONFIG_NET_POLL_CONTROLLER */ 750 751 static int vlan_dev_get_iflink(const struct net_device *dev) 752 { 753 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 754 755 return real_dev->ifindex; 756 } 757 758 static const struct ethtool_ops vlan_ethtool_ops = { 759 .get_link_ksettings = vlan_ethtool_get_link_ksettings, 760 .get_drvinfo = vlan_ethtool_get_drvinfo, 761 .get_link = ethtool_op_get_link, 762 .get_ts_info = vlan_ethtool_get_ts_info, 763 }; 764 765 static const struct net_device_ops vlan_netdev_ops = { 766 .ndo_change_mtu = vlan_dev_change_mtu, 767 .ndo_init = vlan_dev_init, 768 .ndo_uninit = vlan_dev_uninit, 769 .ndo_open = vlan_dev_open, 770 .ndo_stop = vlan_dev_stop, 771 .ndo_start_xmit = vlan_dev_hard_start_xmit, 772 .ndo_validate_addr = eth_validate_addr, 773 .ndo_set_mac_address = vlan_dev_set_mac_address, 774 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 775 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 776 .ndo_do_ioctl = vlan_dev_ioctl, 777 .ndo_neigh_setup = vlan_dev_neigh_setup, 778 .ndo_get_stats64 = vlan_dev_get_stats64, 779 #if IS_ENABLED(CONFIG_FCOE) 780 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 781 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 782 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 783 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 784 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 785 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 786 #endif 787 #ifdef CONFIG_NET_POLL_CONTROLLER 788 .ndo_poll_controller = vlan_dev_poll_controller, 789 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 790 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 791 #endif 792 .ndo_fix_features = vlan_dev_fix_features, 793 .ndo_fdb_add = switchdev_port_fdb_add, 794 .ndo_fdb_del = switchdev_port_fdb_del, 795 .ndo_fdb_dump = switchdev_port_fdb_dump, 796 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 797 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 798 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 799 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, 800 .ndo_get_iflink = vlan_dev_get_iflink, 801 }; 802 803 static void vlan_dev_free(struct net_device *dev) 804 { 805 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 806 807 free_percpu(vlan->vlan_pcpu_stats); 808 vlan->vlan_pcpu_stats = NULL; 809 free_netdev(dev); 810 } 811 812 void vlan_setup(struct net_device *dev) 813 { 814 ether_setup(dev); 815 816 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE; 817 dev->priv_flags |= IFF_UNICAST_FLT; 818 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 819 netif_keep_dst(dev); 820 821 dev->netdev_ops = &vlan_netdev_ops; 822 dev->destructor = vlan_dev_free; 823 dev->ethtool_ops = &vlan_ethtool_ops; 824 825 eth_zero_addr(dev->broadcast); 826 } 827