1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* -*- linux-c -*- 3 * INET 802.1Q VLAN 4 * Ethernet-type device handling. 5 * 6 * Authors: Ben Greear <greearb@candelatech.com> 7 * Please send support related email to: netdev@vger.kernel.org 8 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html 9 * 10 * Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com> 11 * - reset skb->pkt_type on incoming packets when MAC was changed 12 * - see that changed MAC is saddr for outgoing packets 13 * Oct 20, 2001: Ard van Breeman: 14 * - Fix MC-list, finally. 15 * - Flush MC-list on VLAN destroy. 16 */ 17 18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 19 20 #include <linux/module.h> 21 #include <linux/slab.h> 22 #include <linux/skbuff.h> 23 #include <linux/netdevice.h> 24 #include <linux/net_tstamp.h> 25 #include <linux/etherdevice.h> 26 #include <linux/ethtool.h> 27 #include <linux/phy.h> 28 #include <net/arp.h> 29 30 #include "vlan.h" 31 #include "vlanproc.h" 32 #include <linux/if_vlan.h> 33 #include <linux/netpoll.h> 34 35 /* 36 * Create the VLAN header for an arbitrary protocol layer 37 * 38 * saddr=NULL means use device source address 39 * daddr=NULL means leave destination address (eg unresolved arp) 40 * 41 * This is called when the SKB is moving down the stack towards the 42 * physical devices. 43 */ 44 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 45 unsigned short type, 46 const void *daddr, const void *saddr, 47 unsigned int len) 48 { 49 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 50 struct vlan_hdr *vhdr; 51 unsigned int vhdrlen = 0; 52 u16 vlan_tci = 0; 53 int rc; 54 55 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { 56 vhdr = skb_push(skb, VLAN_HLEN); 57 58 vlan_tci = vlan->vlan_id; 59 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); 60 vhdr->h_vlan_TCI = htons(vlan_tci); 61 62 /* 63 * Set the protocol type. For a packet of type ETH_P_802_3/2 we 64 * put the length in here instead. 65 */ 66 if (type != ETH_P_802_3 && type != ETH_P_802_2) 67 vhdr->h_vlan_encapsulated_proto = htons(type); 68 else 69 vhdr->h_vlan_encapsulated_proto = htons(len); 70 71 skb->protocol = vlan->vlan_proto; 72 type = ntohs(vlan->vlan_proto); 73 vhdrlen = VLAN_HLEN; 74 } 75 76 /* Before delegating work to the lower layer, enter our MAC-address */ 77 if (saddr == NULL) 78 saddr = dev->dev_addr; 79 80 /* Now make the underlying real hard header */ 81 dev = vlan->real_dev; 82 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 83 if (rc > 0) 84 rc += vhdrlen; 85 return rc; 86 } 87 88 static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) 89 { 90 #ifdef CONFIG_NET_POLL_CONTROLLER 91 if (vlan->netpoll) 92 netpoll_send_skb(vlan->netpoll, skb); 93 #else 94 BUG(); 95 #endif 96 return NETDEV_TX_OK; 97 } 98 99 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 100 struct net_device *dev) 101 { 102 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 103 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 104 unsigned int len; 105 int ret; 106 107 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 108 * 109 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 110 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 111 */ 112 if (veth->h_vlan_proto != vlan->vlan_proto || 113 vlan->flags & VLAN_FLAG_REORDER_HDR) { 114 u16 vlan_tci; 115 vlan_tci = vlan->vlan_id; 116 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); 117 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); 118 } 119 120 skb->dev = vlan->real_dev; 121 len = skb->len; 122 if (unlikely(netpoll_tx_running(dev))) 123 return vlan_netpoll_send_skb(vlan, skb); 124 125 ret = dev_queue_xmit(skb); 126 127 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { 128 struct vlan_pcpu_stats *stats; 129 130 stats = this_cpu_ptr(vlan->vlan_pcpu_stats); 131 u64_stats_update_begin(&stats->syncp); 132 stats->tx_packets++; 133 stats->tx_bytes += len; 134 u64_stats_update_end(&stats->syncp); 135 } else { 136 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); 137 } 138 139 return ret; 140 } 141 142 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 143 { 144 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 145 unsigned int max_mtu = real_dev->mtu; 146 147 if (netif_reduces_vlan_mtu(real_dev)) 148 max_mtu -= VLAN_HLEN; 149 if (max_mtu < new_mtu) 150 return -ERANGE; 151 152 dev->mtu = new_mtu; 153 154 return 0; 155 } 156 157 void vlan_dev_set_ingress_priority(const struct net_device *dev, 158 u32 skb_prio, u16 vlan_prio) 159 { 160 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 161 162 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 163 vlan->nr_ingress_mappings--; 164 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 165 vlan->nr_ingress_mappings++; 166 167 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 168 } 169 170 int vlan_dev_set_egress_priority(const struct net_device *dev, 171 u32 skb_prio, u16 vlan_prio) 172 { 173 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 174 struct vlan_priority_tci_mapping *mp = NULL; 175 struct vlan_priority_tci_mapping *np; 176 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 177 178 /* See if a priority mapping exists.. */ 179 mp = vlan->egress_priority_map[skb_prio & 0xF]; 180 while (mp) { 181 if (mp->priority == skb_prio) { 182 if (mp->vlan_qos && !vlan_qos) 183 vlan->nr_egress_mappings--; 184 else if (!mp->vlan_qos && vlan_qos) 185 vlan->nr_egress_mappings++; 186 mp->vlan_qos = vlan_qos; 187 return 0; 188 } 189 mp = mp->next; 190 } 191 192 /* Create a new mapping then. */ 193 mp = vlan->egress_priority_map[skb_prio & 0xF]; 194 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 195 if (!np) 196 return -ENOBUFS; 197 198 np->next = mp; 199 np->priority = skb_prio; 200 np->vlan_qos = vlan_qos; 201 /* Before inserting this element in hash table, make sure all its fields 202 * are committed to memory. 203 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() 204 */ 205 smp_wmb(); 206 vlan->egress_priority_map[skb_prio & 0xF] = np; 207 if (vlan_qos) 208 vlan->nr_egress_mappings++; 209 return 0; 210 } 211 212 /* Flags are defined in the vlan_flags enum in 213 * include/uapi/linux/if_vlan.h file. 214 */ 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 VLAN_FLAG_BRIDGE_BINDING)) 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 !(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 297 netif_carrier_on(dev); 298 return 0; 299 300 clear_allmulti: 301 if (dev->flags & IFF_ALLMULTI) 302 dev_set_allmulti(real_dev, -1); 303 del_unicast: 304 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 305 dev_uc_del(real_dev, dev->dev_addr); 306 out: 307 netif_carrier_off(dev); 308 return err; 309 } 310 311 static int vlan_dev_stop(struct net_device *dev) 312 { 313 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 314 struct net_device *real_dev = vlan->real_dev; 315 316 dev_mc_unsync(real_dev, dev); 317 dev_uc_unsync(real_dev, dev); 318 if (dev->flags & IFF_ALLMULTI) 319 dev_set_allmulti(real_dev, -1); 320 if (dev->flags & IFF_PROMISC) 321 dev_set_promiscuity(real_dev, -1); 322 323 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 324 dev_uc_del(real_dev, dev->dev_addr); 325 326 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 327 netif_carrier_off(dev); 328 return 0; 329 } 330 331 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 332 { 333 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 334 struct sockaddr *addr = p; 335 int err; 336 337 if (!is_valid_ether_addr(addr->sa_data)) 338 return -EADDRNOTAVAIL; 339 340 if (!(dev->flags & IFF_UP)) 341 goto out; 342 343 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 344 err = dev_uc_add(real_dev, addr->sa_data); 345 if (err < 0) 346 return err; 347 } 348 349 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 350 dev_uc_del(real_dev, dev->dev_addr); 351 352 out: 353 ether_addr_copy(dev->dev_addr, addr->sa_data); 354 return 0; 355 } 356 357 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 358 { 359 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 360 const struct net_device_ops *ops = real_dev->netdev_ops; 361 struct ifreq ifrr; 362 int err = -EOPNOTSUPP; 363 364 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 365 ifrr.ifr_ifru = ifr->ifr_ifru; 366 367 switch (cmd) { 368 case SIOCSHWTSTAMP: 369 if (!net_eq(dev_net(dev), &init_net)) 370 break; 371 /* fall through */ 372 case SIOCGMIIPHY: 373 case SIOCGMIIREG: 374 case SIOCSMIIREG: 375 case SIOCGHWTSTAMP: 376 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 377 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 378 break; 379 } 380 381 if (!err) 382 ifr->ifr_ifru = ifrr.ifr_ifru; 383 384 return err; 385 } 386 387 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 388 { 389 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 390 const struct net_device_ops *ops = real_dev->netdev_ops; 391 int err = 0; 392 393 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 394 err = ops->ndo_neigh_setup(real_dev, pa); 395 396 return err; 397 } 398 399 #if IS_ENABLED(CONFIG_FCOE) 400 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 401 struct scatterlist *sgl, unsigned int sgc) 402 { 403 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 404 const struct net_device_ops *ops = real_dev->netdev_ops; 405 int rc = 0; 406 407 if (ops->ndo_fcoe_ddp_setup) 408 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 409 410 return rc; 411 } 412 413 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 414 { 415 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 416 const struct net_device_ops *ops = real_dev->netdev_ops; 417 int len = 0; 418 419 if (ops->ndo_fcoe_ddp_done) 420 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 421 422 return len; 423 } 424 425 static int vlan_dev_fcoe_enable(struct net_device *dev) 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 = -EINVAL; 430 431 if (ops->ndo_fcoe_enable) 432 rc = ops->ndo_fcoe_enable(real_dev); 433 return rc; 434 } 435 436 static int vlan_dev_fcoe_disable(struct net_device *dev) 437 { 438 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 439 const struct net_device_ops *ops = real_dev->netdev_ops; 440 int rc = -EINVAL; 441 442 if (ops->ndo_fcoe_disable) 443 rc = ops->ndo_fcoe_disable(real_dev); 444 return rc; 445 } 446 447 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 448 struct scatterlist *sgl, unsigned int sgc) 449 { 450 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 451 const struct net_device_ops *ops = real_dev->netdev_ops; 452 int rc = 0; 453 454 if (ops->ndo_fcoe_ddp_target) 455 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 456 457 return rc; 458 } 459 #endif 460 461 #ifdef NETDEV_FCOE_WWNN 462 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 463 { 464 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 465 const struct net_device_ops *ops = real_dev->netdev_ops; 466 int rc = -EINVAL; 467 468 if (ops->ndo_fcoe_get_wwn) 469 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 470 return rc; 471 } 472 #endif 473 474 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 475 { 476 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 477 478 if (dev->flags & IFF_UP) { 479 if (change & IFF_ALLMULTI) 480 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 481 if (change & IFF_PROMISC) 482 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 483 } 484 } 485 486 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 487 { 488 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 489 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 490 } 491 492 /* 493 * vlan network devices have devices nesting below it, and are a special 494 * "super class" of normal network devices; split their locks off into a 495 * separate class since they always nest. 496 */ 497 static struct lock_class_key vlan_netdev_xmit_lock_key; 498 static struct lock_class_key vlan_netdev_addr_lock_key; 499 500 static void vlan_dev_set_lockdep_one(struct net_device *dev, 501 struct netdev_queue *txq, 502 void *_subclass) 503 { 504 lockdep_set_class_and_subclass(&txq->_xmit_lock, 505 &vlan_netdev_xmit_lock_key, 506 *(int *)_subclass); 507 } 508 509 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 510 { 511 lockdep_set_class_and_subclass(&dev->addr_list_lock, 512 &vlan_netdev_addr_lock_key, 513 subclass); 514 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 515 } 516 517 static int vlan_dev_get_lock_subclass(struct net_device *dev) 518 { 519 return vlan_dev_priv(dev)->nest_level; 520 } 521 522 static const struct header_ops vlan_header_ops = { 523 .create = vlan_dev_hard_header, 524 .parse = eth_header_parse, 525 }; 526 527 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, 528 unsigned short type, 529 const void *daddr, const void *saddr, 530 unsigned int len) 531 { 532 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 533 struct net_device *real_dev = vlan->real_dev; 534 535 if (saddr == NULL) 536 saddr = dev->dev_addr; 537 538 return dev_hard_header(skb, real_dev, type, daddr, saddr, len); 539 } 540 541 static const struct header_ops vlan_passthru_header_ops = { 542 .create = vlan_passthru_hard_header, 543 .parse = eth_header_parse, 544 }; 545 546 static struct device_type vlan_type = { 547 .name = "vlan", 548 }; 549 550 static const struct net_device_ops vlan_netdev_ops; 551 552 static int vlan_dev_init(struct net_device *dev) 553 { 554 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 555 struct net_device *real_dev = vlan->real_dev; 556 557 netif_carrier_off(dev); 558 559 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 560 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 561 IFF_MASTER | IFF_SLAVE); 562 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 563 (1<<__LINK_STATE_DORMANT))) | 564 (1<<__LINK_STATE_PRESENT); 565 566 if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING) 567 dev->state |= (1 << __LINK_STATE_NOCARRIER); 568 569 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | 570 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | 571 NETIF_F_GSO_ENCAP_ALL | 572 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC | 573 NETIF_F_ALL_FCOE; 574 575 dev->features |= dev->hw_features | NETIF_F_LLTX; 576 dev->gso_max_size = real_dev->gso_max_size; 577 dev->gso_max_segs = real_dev->gso_max_segs; 578 if (dev->features & NETIF_F_VLAN_FEATURES) 579 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); 580 581 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; 582 dev->hw_enc_features = vlan_tnl_features(real_dev); 583 584 /* ipv6 shared card related stuff */ 585 dev->dev_id = real_dev->dev_id; 586 587 if (is_zero_ether_addr(dev->dev_addr)) { 588 ether_addr_copy(dev->dev_addr, real_dev->dev_addr); 589 dev->addr_assign_type = NET_ADDR_STOLEN; 590 } 591 if (is_zero_ether_addr(dev->broadcast)) 592 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 593 594 #if IS_ENABLED(CONFIG_FCOE) 595 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 596 #endif 597 598 dev->needed_headroom = real_dev->needed_headroom; 599 if (vlan_hw_offload_capable(real_dev->features, vlan->vlan_proto)) { 600 dev->header_ops = &vlan_passthru_header_ops; 601 dev->hard_header_len = real_dev->hard_header_len; 602 } else { 603 dev->header_ops = &vlan_header_ops; 604 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 605 } 606 607 dev->netdev_ops = &vlan_netdev_ops; 608 609 SET_NETDEV_DEVTYPE(dev, &vlan_type); 610 611 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); 612 613 vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); 614 if (!vlan->vlan_pcpu_stats) 615 return -ENOMEM; 616 617 return 0; 618 } 619 620 static void vlan_dev_uninit(struct net_device *dev) 621 { 622 struct vlan_priority_tci_mapping *pm; 623 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 624 int i; 625 626 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 627 while ((pm = vlan->egress_priority_map[i]) != NULL) { 628 vlan->egress_priority_map[i] = pm->next; 629 kfree(pm); 630 } 631 } 632 } 633 634 static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 635 netdev_features_t features) 636 { 637 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 638 netdev_features_t old_features = features; 639 netdev_features_t lower_features; 640 641 lower_features = netdev_intersect_features((real_dev->vlan_features | 642 NETIF_F_RXCSUM), 643 real_dev->features); 644 645 /* Add HW_CSUM setting to preserve user ability to control 646 * checksum offload on the vlan device. 647 */ 648 if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)) 649 lower_features |= NETIF_F_HW_CSUM; 650 features = netdev_intersect_features(features, lower_features); 651 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); 652 features |= NETIF_F_LLTX; 653 654 return features; 655 } 656 657 static int vlan_ethtool_get_link_ksettings(struct net_device *dev, 658 struct ethtool_link_ksettings *cmd) 659 { 660 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 661 662 return __ethtool_get_link_ksettings(vlan->real_dev, cmd); 663 } 664 665 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 666 struct ethtool_drvinfo *info) 667 { 668 strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); 669 strlcpy(info->version, vlan_version, sizeof(info->version)); 670 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 671 } 672 673 static int vlan_ethtool_get_ts_info(struct net_device *dev, 674 struct ethtool_ts_info *info) 675 { 676 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 677 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; 678 struct phy_device *phydev = vlan->real_dev->phydev; 679 680 if (phydev && phydev->drv && phydev->drv->ts_info) { 681 return phydev->drv->ts_info(phydev, info); 682 } else if (ops->get_ts_info) { 683 return ops->get_ts_info(vlan->real_dev, info); 684 } else { 685 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | 686 SOF_TIMESTAMPING_SOFTWARE; 687 info->phc_index = -1; 688 } 689 690 return 0; 691 } 692 693 static void vlan_dev_get_stats64(struct net_device *dev, 694 struct rtnl_link_stats64 *stats) 695 { 696 struct vlan_pcpu_stats *p; 697 u32 rx_errors = 0, tx_dropped = 0; 698 int i; 699 700 for_each_possible_cpu(i) { 701 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 702 unsigned int start; 703 704 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); 705 do { 706 start = u64_stats_fetch_begin_irq(&p->syncp); 707 rxpackets = p->rx_packets; 708 rxbytes = p->rx_bytes; 709 rxmulticast = p->rx_multicast; 710 txpackets = p->tx_packets; 711 txbytes = p->tx_bytes; 712 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 713 714 stats->rx_packets += rxpackets; 715 stats->rx_bytes += rxbytes; 716 stats->multicast += rxmulticast; 717 stats->tx_packets += txpackets; 718 stats->tx_bytes += txbytes; 719 /* rx_errors & tx_dropped are u32 */ 720 rx_errors += p->rx_errors; 721 tx_dropped += p->tx_dropped; 722 } 723 stats->rx_errors = rx_errors; 724 stats->tx_dropped = tx_dropped; 725 } 726 727 #ifdef CONFIG_NET_POLL_CONTROLLER 728 static void vlan_dev_poll_controller(struct net_device *dev) 729 { 730 return; 731 } 732 733 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) 734 { 735 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 736 struct net_device *real_dev = vlan->real_dev; 737 struct netpoll *netpoll; 738 int err = 0; 739 740 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 741 err = -ENOMEM; 742 if (!netpoll) 743 goto out; 744 745 err = __netpoll_setup(netpoll, real_dev); 746 if (err) { 747 kfree(netpoll); 748 goto out; 749 } 750 751 vlan->netpoll = netpoll; 752 753 out: 754 return err; 755 } 756 757 static void vlan_dev_netpoll_cleanup(struct net_device *dev) 758 { 759 struct vlan_dev_priv *vlan= vlan_dev_priv(dev); 760 struct netpoll *netpoll = vlan->netpoll; 761 762 if (!netpoll) 763 return; 764 765 vlan->netpoll = NULL; 766 __netpoll_free(netpoll); 767 } 768 #endif /* CONFIG_NET_POLL_CONTROLLER */ 769 770 static int vlan_dev_get_iflink(const struct net_device *dev) 771 { 772 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 773 774 return real_dev->ifindex; 775 } 776 777 static const struct ethtool_ops vlan_ethtool_ops = { 778 .get_link_ksettings = vlan_ethtool_get_link_ksettings, 779 .get_drvinfo = vlan_ethtool_get_drvinfo, 780 .get_link = ethtool_op_get_link, 781 .get_ts_info = vlan_ethtool_get_ts_info, 782 }; 783 784 static const struct net_device_ops vlan_netdev_ops = { 785 .ndo_change_mtu = vlan_dev_change_mtu, 786 .ndo_init = vlan_dev_init, 787 .ndo_uninit = vlan_dev_uninit, 788 .ndo_open = vlan_dev_open, 789 .ndo_stop = vlan_dev_stop, 790 .ndo_start_xmit = vlan_dev_hard_start_xmit, 791 .ndo_validate_addr = eth_validate_addr, 792 .ndo_set_mac_address = vlan_dev_set_mac_address, 793 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 794 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 795 .ndo_do_ioctl = vlan_dev_ioctl, 796 .ndo_neigh_setup = vlan_dev_neigh_setup, 797 .ndo_get_stats64 = vlan_dev_get_stats64, 798 #if IS_ENABLED(CONFIG_FCOE) 799 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 800 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 801 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 802 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 803 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 804 #endif 805 #ifdef NETDEV_FCOE_WWNN 806 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 807 #endif 808 #ifdef CONFIG_NET_POLL_CONTROLLER 809 .ndo_poll_controller = vlan_dev_poll_controller, 810 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 811 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 812 #endif 813 .ndo_fix_features = vlan_dev_fix_features, 814 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, 815 .ndo_get_iflink = vlan_dev_get_iflink, 816 }; 817 818 static void vlan_dev_free(struct net_device *dev) 819 { 820 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 821 822 free_percpu(vlan->vlan_pcpu_stats); 823 vlan->vlan_pcpu_stats = NULL; 824 } 825 826 void vlan_setup(struct net_device *dev) 827 { 828 ether_setup(dev); 829 830 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE; 831 dev->priv_flags |= IFF_UNICAST_FLT; 832 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 833 netif_keep_dst(dev); 834 835 dev->netdev_ops = &vlan_netdev_ops; 836 dev->needs_free_netdev = true; 837 dev->priv_destructor = vlan_dev_free; 838 dev->ethtool_ops = &vlan_ethtool_ops; 839 840 dev->min_mtu = 0; 841 dev->max_mtu = ETH_MAX_MTU; 842 843 eth_zero_addr(dev->broadcast); 844 } 845