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 <linux/phy.h> 33 #include <net/arp.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 = 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 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 150 unsigned int max_mtu = real_dev->mtu; 151 152 if (netif_reduces_vlan_mtu(real_dev)) 153 max_mtu -= VLAN_HLEN; 154 if (max_mtu < new_mtu) 155 return -ERANGE; 156 157 dev->mtu = new_mtu; 158 159 return 0; 160 } 161 162 void vlan_dev_set_ingress_priority(const struct net_device *dev, 163 u32 skb_prio, u16 vlan_prio) 164 { 165 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 166 167 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 168 vlan->nr_ingress_mappings--; 169 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 170 vlan->nr_ingress_mappings++; 171 172 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 173 } 174 175 int vlan_dev_set_egress_priority(const struct net_device *dev, 176 u32 skb_prio, u16 vlan_prio) 177 { 178 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 179 struct vlan_priority_tci_mapping *mp = NULL; 180 struct vlan_priority_tci_mapping *np; 181 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 182 183 /* See if a priority mapping exists.. */ 184 mp = vlan->egress_priority_map[skb_prio & 0xF]; 185 while (mp) { 186 if (mp->priority == skb_prio) { 187 if (mp->vlan_qos && !vlan_qos) 188 vlan->nr_egress_mappings--; 189 else if (!mp->vlan_qos && vlan_qos) 190 vlan->nr_egress_mappings++; 191 mp->vlan_qos = vlan_qos; 192 return 0; 193 } 194 mp = mp->next; 195 } 196 197 /* Create a new mapping then. */ 198 mp = vlan->egress_priority_map[skb_prio & 0xF]; 199 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 200 if (!np) 201 return -ENOBUFS; 202 203 np->next = mp; 204 np->priority = skb_prio; 205 np->vlan_qos = vlan_qos; 206 /* Before inserting this element in hash table, make sure all its fields 207 * are committed to memory. 208 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() 209 */ 210 smp_wmb(); 211 vlan->egress_priority_map[skb_prio & 0xF] = np; 212 if (vlan_qos) 213 vlan->nr_egress_mappings++; 214 return 0; 215 } 216 217 /* Flags are defined in the vlan_flags enum in 218 * include/uapi/linux/if_vlan.h file. 219 */ 220 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 221 { 222 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 223 u32 old_flags = vlan->flags; 224 225 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 226 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP | 227 VLAN_FLAG_BRIDGE_BINDING)) 228 return -EINVAL; 229 230 vlan->flags = (old_flags & ~mask) | (flags & mask); 231 232 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 233 if (vlan->flags & VLAN_FLAG_GVRP) 234 vlan_gvrp_request_join(dev); 235 else 236 vlan_gvrp_request_leave(dev); 237 } 238 239 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { 240 if (vlan->flags & VLAN_FLAG_MVRP) 241 vlan_mvrp_request_join(dev); 242 else 243 vlan_mvrp_request_leave(dev); 244 } 245 return 0; 246 } 247 248 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 249 { 250 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); 251 } 252 253 bool vlan_dev_inherit_address(struct net_device *dev, 254 struct net_device *real_dev) 255 { 256 if (dev->addr_assign_type != NET_ADDR_STOLEN) 257 return false; 258 259 ether_addr_copy(dev->dev_addr, real_dev->dev_addr); 260 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 261 return true; 262 } 263 264 static int vlan_dev_open(struct net_device *dev) 265 { 266 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 267 struct net_device *real_dev = vlan->real_dev; 268 int err; 269 270 if (!(real_dev->flags & IFF_UP) && 271 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 272 return -ENETDOWN; 273 274 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) && 275 !vlan_dev_inherit_address(dev, real_dev)) { 276 err = dev_uc_add(real_dev, dev->dev_addr); 277 if (err < 0) 278 goto out; 279 } 280 281 if (dev->flags & IFF_ALLMULTI) { 282 err = dev_set_allmulti(real_dev, 1); 283 if (err < 0) 284 goto del_unicast; 285 } 286 if (dev->flags & IFF_PROMISC) { 287 err = dev_set_promiscuity(real_dev, 1); 288 if (err < 0) 289 goto clear_allmulti; 290 } 291 292 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); 293 294 if (vlan->flags & VLAN_FLAG_GVRP) 295 vlan_gvrp_request_join(dev); 296 297 if (vlan->flags & VLAN_FLAG_MVRP) 298 vlan_mvrp_request_join(dev); 299 300 if (netif_carrier_ok(real_dev) && 301 !(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 302 netif_carrier_on(dev); 303 return 0; 304 305 clear_allmulti: 306 if (dev->flags & IFF_ALLMULTI) 307 dev_set_allmulti(real_dev, -1); 308 del_unicast: 309 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 310 dev_uc_del(real_dev, dev->dev_addr); 311 out: 312 netif_carrier_off(dev); 313 return err; 314 } 315 316 static int vlan_dev_stop(struct net_device *dev) 317 { 318 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 319 struct net_device *real_dev = vlan->real_dev; 320 321 dev_mc_unsync(real_dev, dev); 322 dev_uc_unsync(real_dev, dev); 323 if (dev->flags & IFF_ALLMULTI) 324 dev_set_allmulti(real_dev, -1); 325 if (dev->flags & IFF_PROMISC) 326 dev_set_promiscuity(real_dev, -1); 327 328 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 329 dev_uc_del(real_dev, dev->dev_addr); 330 331 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 332 netif_carrier_off(dev); 333 return 0; 334 } 335 336 static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 337 { 338 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 339 struct sockaddr *addr = p; 340 int err; 341 342 if (!is_valid_ether_addr(addr->sa_data)) 343 return -EADDRNOTAVAIL; 344 345 if (!(dev->flags & IFF_UP)) 346 goto out; 347 348 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 349 err = dev_uc_add(real_dev, addr->sa_data); 350 if (err < 0) 351 return err; 352 } 353 354 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 355 dev_uc_del(real_dev, dev->dev_addr); 356 357 out: 358 ether_addr_copy(dev->dev_addr, addr->sa_data); 359 return 0; 360 } 361 362 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 363 { 364 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 365 const struct net_device_ops *ops = real_dev->netdev_ops; 366 struct ifreq ifrr; 367 int err = -EOPNOTSUPP; 368 369 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 370 ifrr.ifr_ifru = ifr->ifr_ifru; 371 372 switch (cmd) { 373 case SIOCGMIIPHY: 374 case SIOCGMIIREG: 375 case SIOCSMIIREG: 376 case SIOCSHWTSTAMP: 377 case SIOCGHWTSTAMP: 378 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 379 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 380 break; 381 } 382 383 if (!err) 384 ifr->ifr_ifru = ifrr.ifr_ifru; 385 386 return err; 387 } 388 389 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 390 { 391 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 392 const struct net_device_ops *ops = real_dev->netdev_ops; 393 int err = 0; 394 395 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 396 err = ops->ndo_neigh_setup(real_dev, pa); 397 398 return err; 399 } 400 401 #if IS_ENABLED(CONFIG_FCOE) 402 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 403 struct scatterlist *sgl, unsigned int sgc) 404 { 405 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 406 const struct net_device_ops *ops = real_dev->netdev_ops; 407 int rc = 0; 408 409 if (ops->ndo_fcoe_ddp_setup) 410 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 411 412 return rc; 413 } 414 415 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 416 { 417 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 418 const struct net_device_ops *ops = real_dev->netdev_ops; 419 int len = 0; 420 421 if (ops->ndo_fcoe_ddp_done) 422 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 423 424 return len; 425 } 426 427 static int vlan_dev_fcoe_enable(struct net_device *dev) 428 { 429 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 430 const struct net_device_ops *ops = real_dev->netdev_ops; 431 int rc = -EINVAL; 432 433 if (ops->ndo_fcoe_enable) 434 rc = ops->ndo_fcoe_enable(real_dev); 435 return rc; 436 } 437 438 static int vlan_dev_fcoe_disable(struct net_device *dev) 439 { 440 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 441 const struct net_device_ops *ops = real_dev->netdev_ops; 442 int rc = -EINVAL; 443 444 if (ops->ndo_fcoe_disable) 445 rc = ops->ndo_fcoe_disable(real_dev); 446 return rc; 447 } 448 449 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 450 struct scatterlist *sgl, unsigned int sgc) 451 { 452 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 453 const struct net_device_ops *ops = real_dev->netdev_ops; 454 int rc = 0; 455 456 if (ops->ndo_fcoe_ddp_target) 457 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 458 459 return rc; 460 } 461 #endif 462 463 #ifdef NETDEV_FCOE_WWNN 464 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 465 { 466 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 467 const struct net_device_ops *ops = real_dev->netdev_ops; 468 int rc = -EINVAL; 469 470 if (ops->ndo_fcoe_get_wwn) 471 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 472 return rc; 473 } 474 #endif 475 476 static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 477 { 478 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 479 480 if (dev->flags & IFF_UP) { 481 if (change & IFF_ALLMULTI) 482 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 483 if (change & IFF_PROMISC) 484 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 485 } 486 } 487 488 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 489 { 490 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 491 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 492 } 493 494 /* 495 * vlan network devices have devices nesting below it, and are a special 496 * "super class" of normal network devices; split their locks off into a 497 * separate class since they always nest. 498 */ 499 static struct lock_class_key vlan_netdev_xmit_lock_key; 500 static struct lock_class_key vlan_netdev_addr_lock_key; 501 502 static void vlan_dev_set_lockdep_one(struct net_device *dev, 503 struct netdev_queue *txq, 504 void *_subclass) 505 { 506 lockdep_set_class_and_subclass(&txq->_xmit_lock, 507 &vlan_netdev_xmit_lock_key, 508 *(int *)_subclass); 509 } 510 511 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 512 { 513 lockdep_set_class_and_subclass(&dev->addr_list_lock, 514 &vlan_netdev_addr_lock_key, 515 subclass); 516 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 517 } 518 519 static int vlan_dev_get_lock_subclass(struct net_device *dev) 520 { 521 return vlan_dev_priv(dev)->nest_level; 522 } 523 524 static const struct header_ops vlan_header_ops = { 525 .create = vlan_dev_hard_header, 526 .parse = eth_header_parse, 527 }; 528 529 static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, 530 unsigned short type, 531 const void *daddr, const void *saddr, 532 unsigned int len) 533 { 534 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 535 struct net_device *real_dev = vlan->real_dev; 536 537 if (saddr == NULL) 538 saddr = dev->dev_addr; 539 540 return dev_hard_header(skb, real_dev, type, daddr, saddr, len); 541 } 542 543 static const struct header_ops vlan_passthru_header_ops = { 544 .create = vlan_passthru_hard_header, 545 .parse = eth_header_parse, 546 }; 547 548 static struct device_type vlan_type = { 549 .name = "vlan", 550 }; 551 552 static const struct net_device_ops vlan_netdev_ops; 553 554 static int vlan_dev_init(struct net_device *dev) 555 { 556 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 557 struct net_device *real_dev = vlan->real_dev; 558 559 netif_carrier_off(dev); 560 561 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 562 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 563 IFF_MASTER | IFF_SLAVE); 564 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 565 (1<<__LINK_STATE_DORMANT))) | 566 (1<<__LINK_STATE_PRESENT); 567 568 if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING) 569 dev->state |= (1 << __LINK_STATE_NOCARRIER); 570 571 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | 572 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | 573 NETIF_F_GSO_ENCAP_ALL | 574 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC | 575 NETIF_F_ALL_FCOE; 576 577 dev->features |= dev->hw_features | NETIF_F_LLTX; 578 dev->gso_max_size = real_dev->gso_max_size; 579 dev->gso_max_segs = real_dev->gso_max_segs; 580 if (dev->features & NETIF_F_VLAN_FEATURES) 581 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); 582 583 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; 584 dev->hw_enc_features = vlan_tnl_features(real_dev); 585 586 /* ipv6 shared card related stuff */ 587 dev->dev_id = real_dev->dev_id; 588 589 if (is_zero_ether_addr(dev->dev_addr)) { 590 ether_addr_copy(dev->dev_addr, real_dev->dev_addr); 591 dev->addr_assign_type = NET_ADDR_STOLEN; 592 } 593 if (is_zero_ether_addr(dev->broadcast)) 594 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 595 596 #if IS_ENABLED(CONFIG_FCOE) 597 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 598 #endif 599 600 dev->needed_headroom = real_dev->needed_headroom; 601 if (vlan_hw_offload_capable(real_dev->features, vlan->vlan_proto)) { 602 dev->header_ops = &vlan_passthru_header_ops; 603 dev->hard_header_len = real_dev->hard_header_len; 604 } else { 605 dev->header_ops = &vlan_header_ops; 606 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 607 } 608 609 dev->netdev_ops = &vlan_netdev_ops; 610 611 SET_NETDEV_DEVTYPE(dev, &vlan_type); 612 613 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); 614 615 vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); 616 if (!vlan->vlan_pcpu_stats) 617 return -ENOMEM; 618 619 return 0; 620 } 621 622 static void vlan_dev_uninit(struct net_device *dev) 623 { 624 struct vlan_priority_tci_mapping *pm; 625 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 626 int i; 627 628 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 629 while ((pm = vlan->egress_priority_map[i]) != NULL) { 630 vlan->egress_priority_map[i] = pm->next; 631 kfree(pm); 632 } 633 } 634 } 635 636 static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 637 netdev_features_t features) 638 { 639 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 640 netdev_features_t old_features = features; 641 netdev_features_t lower_features; 642 643 lower_features = netdev_intersect_features((real_dev->vlan_features | 644 NETIF_F_RXCSUM), 645 real_dev->features); 646 647 /* Add HW_CSUM setting to preserve user ability to control 648 * checksum offload on the vlan device. 649 */ 650 if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)) 651 lower_features |= NETIF_F_HW_CSUM; 652 features = netdev_intersect_features(features, lower_features); 653 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); 654 features |= NETIF_F_LLTX; 655 656 return features; 657 } 658 659 static int vlan_ethtool_get_link_ksettings(struct net_device *dev, 660 struct ethtool_link_ksettings *cmd) 661 { 662 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 663 664 return __ethtool_get_link_ksettings(vlan->real_dev, cmd); 665 } 666 667 static void vlan_ethtool_get_drvinfo(struct net_device *dev, 668 struct ethtool_drvinfo *info) 669 { 670 strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); 671 strlcpy(info->version, vlan_version, sizeof(info->version)); 672 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 673 } 674 675 static int vlan_ethtool_get_ts_info(struct net_device *dev, 676 struct ethtool_ts_info *info) 677 { 678 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 679 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; 680 struct phy_device *phydev = vlan->real_dev->phydev; 681 682 if (phydev && phydev->drv && phydev->drv->ts_info) { 683 return phydev->drv->ts_info(phydev, info); 684 } else if (ops->get_ts_info) { 685 return ops->get_ts_info(vlan->real_dev, info); 686 } else { 687 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | 688 SOF_TIMESTAMPING_SOFTWARE; 689 info->phc_index = -1; 690 } 691 692 return 0; 693 } 694 695 static void vlan_dev_get_stats64(struct net_device *dev, 696 struct rtnl_link_stats64 *stats) 697 { 698 struct vlan_pcpu_stats *p; 699 u32 rx_errors = 0, tx_dropped = 0; 700 int i; 701 702 for_each_possible_cpu(i) { 703 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 704 unsigned int start; 705 706 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); 707 do { 708 start = u64_stats_fetch_begin_irq(&p->syncp); 709 rxpackets = p->rx_packets; 710 rxbytes = p->rx_bytes; 711 rxmulticast = p->rx_multicast; 712 txpackets = p->tx_packets; 713 txbytes = p->tx_bytes; 714 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 715 716 stats->rx_packets += rxpackets; 717 stats->rx_bytes += rxbytes; 718 stats->multicast += rxmulticast; 719 stats->tx_packets += txpackets; 720 stats->tx_bytes += txbytes; 721 /* rx_errors & tx_dropped are u32 */ 722 rx_errors += p->rx_errors; 723 tx_dropped += p->tx_dropped; 724 } 725 stats->rx_errors = rx_errors; 726 stats->tx_dropped = tx_dropped; 727 } 728 729 #ifdef CONFIG_NET_POLL_CONTROLLER 730 static void vlan_dev_poll_controller(struct net_device *dev) 731 { 732 return; 733 } 734 735 static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) 736 { 737 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 738 struct net_device *real_dev = vlan->real_dev; 739 struct netpoll *netpoll; 740 int err = 0; 741 742 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 743 err = -ENOMEM; 744 if (!netpoll) 745 goto out; 746 747 err = __netpoll_setup(netpoll, real_dev); 748 if (err) { 749 kfree(netpoll); 750 goto out; 751 } 752 753 vlan->netpoll = netpoll; 754 755 out: 756 return err; 757 } 758 759 static void vlan_dev_netpoll_cleanup(struct net_device *dev) 760 { 761 struct vlan_dev_priv *vlan= vlan_dev_priv(dev); 762 struct netpoll *netpoll = vlan->netpoll; 763 764 if (!netpoll) 765 return; 766 767 vlan->netpoll = NULL; 768 __netpoll_free(netpoll); 769 } 770 #endif /* CONFIG_NET_POLL_CONTROLLER */ 771 772 static int vlan_dev_get_iflink(const struct net_device *dev) 773 { 774 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 775 776 return real_dev->ifindex; 777 } 778 779 static const struct ethtool_ops vlan_ethtool_ops = { 780 .get_link_ksettings = vlan_ethtool_get_link_ksettings, 781 .get_drvinfo = vlan_ethtool_get_drvinfo, 782 .get_link = ethtool_op_get_link, 783 .get_ts_info = vlan_ethtool_get_ts_info, 784 }; 785 786 static const struct net_device_ops vlan_netdev_ops = { 787 .ndo_change_mtu = vlan_dev_change_mtu, 788 .ndo_init = vlan_dev_init, 789 .ndo_uninit = vlan_dev_uninit, 790 .ndo_open = vlan_dev_open, 791 .ndo_stop = vlan_dev_stop, 792 .ndo_start_xmit = vlan_dev_hard_start_xmit, 793 .ndo_validate_addr = eth_validate_addr, 794 .ndo_set_mac_address = vlan_dev_set_mac_address, 795 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 796 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 797 .ndo_do_ioctl = vlan_dev_ioctl, 798 .ndo_neigh_setup = vlan_dev_neigh_setup, 799 .ndo_get_stats64 = vlan_dev_get_stats64, 800 #if IS_ENABLED(CONFIG_FCOE) 801 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 802 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 803 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 804 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 805 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 806 #endif 807 #ifdef NETDEV_FCOE_WWNN 808 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 809 #endif 810 #ifdef CONFIG_NET_POLL_CONTROLLER 811 .ndo_poll_controller = vlan_dev_poll_controller, 812 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 813 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 814 #endif 815 .ndo_fix_features = vlan_dev_fix_features, 816 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, 817 .ndo_get_iflink = vlan_dev_get_iflink, 818 }; 819 820 static void vlan_dev_free(struct net_device *dev) 821 { 822 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 823 824 free_percpu(vlan->vlan_pcpu_stats); 825 vlan->vlan_pcpu_stats = NULL; 826 } 827 828 void vlan_setup(struct net_device *dev) 829 { 830 ether_setup(dev); 831 832 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE; 833 dev->priv_flags |= IFF_UNICAST_FLT; 834 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 835 netif_keep_dst(dev); 836 837 dev->netdev_ops = &vlan_netdev_ops; 838 dev->needs_free_netdev = true; 839 dev->priv_destructor = vlan_dev_free; 840 dev->ethtool_ops = &vlan_ethtool_ops; 841 842 dev->min_mtu = 0; 843 dev->max_mtu = ETH_MAX_MTU; 844 845 eth_zero_addr(dev->broadcast); 846 } 847