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 */ 44static 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 88static 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 return netpoll_send_skb(vlan->netpoll, skb); 92#else 93 BUG(); 94 return NETDEV_TX_OK; 95#endif 96} 97 98static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 99 struct net_device *dev) 100{ 101 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 102 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 103 unsigned int len; 104 int ret; 105 106 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 107 * 108 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 109 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 110 */ 111 if (vlan->flags & VLAN_FLAG_REORDER_HDR || 112 veth->h_vlan_proto != vlan->vlan_proto) { 113 u16 vlan_tci; 114 vlan_tci = vlan->vlan_id; 115 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); 116 __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); 117 } 118 119 skb->dev = vlan->real_dev; 120 len = skb->len; 121 if (unlikely(netpoll_tx_running(dev))) 122 return vlan_netpoll_send_skb(vlan, skb); 123 124 ret = dev_queue_xmit(skb); 125 126 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { 127 struct vlan_pcpu_stats *stats; 128 129 stats = this_cpu_ptr(vlan->vlan_pcpu_stats); 130 u64_stats_update_begin(&stats->syncp); 131 stats->tx_packets++; 132 stats->tx_bytes += len; 133 u64_stats_update_end(&stats->syncp); 134 } else { 135 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); 136 } 137 138 return ret; 139} 140 141static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 142{ 143 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 144 unsigned int max_mtu = real_dev->mtu; 145 146 if (netif_reduces_vlan_mtu(real_dev)) 147 max_mtu -= VLAN_HLEN; 148 if (max_mtu < new_mtu) 149 return -ERANGE; 150 151 dev->mtu = new_mtu; 152 153 return 0; 154} 155 156void vlan_dev_set_ingress_priority(const struct net_device *dev, 157 u32 skb_prio, u16 vlan_prio) 158{ 159 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 160 161 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 162 vlan->nr_ingress_mappings--; 163 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 164 vlan->nr_ingress_mappings++; 165 166 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 167} 168 169int vlan_dev_set_egress_priority(const struct net_device *dev, 170 u32 skb_prio, u16 vlan_prio) 171{ 172 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 173 struct vlan_priority_tci_mapping *mp = NULL; 174 struct vlan_priority_tci_mapping *np; 175 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 176 177 /* See if a priority mapping exists.. */ 178 mp = vlan->egress_priority_map[skb_prio & 0xF]; 179 while (mp) { 180 if (mp->priority == skb_prio) { 181 if (mp->vlan_qos && !vlan_qos) 182 vlan->nr_egress_mappings--; 183 else if (!mp->vlan_qos && vlan_qos) 184 vlan->nr_egress_mappings++; 185 mp->vlan_qos = vlan_qos; 186 return 0; 187 } 188 mp = mp->next; 189 } 190 191 /* Create a new mapping then. */ 192 mp = vlan->egress_priority_map[skb_prio & 0xF]; 193 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 194 if (!np) 195 return -ENOBUFS; 196 197 np->next = mp; 198 np->priority = skb_prio; 199 np->vlan_qos = vlan_qos; 200 /* Before inserting this element in hash table, make sure all its fields 201 * are committed to memory. 202 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() 203 */ 204 smp_wmb(); 205 vlan->egress_priority_map[skb_prio & 0xF] = np; 206 if (vlan_qos) 207 vlan->nr_egress_mappings++; 208 return 0; 209} 210 211/* Flags are defined in the vlan_flags enum in 212 * include/uapi/linux/if_vlan.h file. 213 */ 214int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 215{ 216 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 217 u32 old_flags = vlan->flags; 218 219 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 220 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP | 221 VLAN_FLAG_BRIDGE_BINDING)) 222 return -EINVAL; 223 224 vlan->flags = (old_flags & ~mask) | (flags & mask); 225 226 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 227 if (vlan->flags & VLAN_FLAG_GVRP) 228 vlan_gvrp_request_join(dev); 229 else 230 vlan_gvrp_request_leave(dev); 231 } 232 233 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { 234 if (vlan->flags & VLAN_FLAG_MVRP) 235 vlan_mvrp_request_join(dev); 236 else 237 vlan_mvrp_request_leave(dev); 238 } 239 return 0; 240} 241 242void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 243{ 244 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); 245} 246 247bool vlan_dev_inherit_address(struct net_device *dev, 248 struct net_device *real_dev) 249{ 250 if (dev->addr_assign_type != NET_ADDR_STOLEN) 251 return false; 252 253 ether_addr_copy(dev->dev_addr, real_dev->dev_addr); 254 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 255 return true; 256} 257 258static int vlan_dev_open(struct net_device *dev) 259{ 260 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 261 struct net_device *real_dev = vlan->real_dev; 262 int err; 263 264 if (!(real_dev->flags & IFF_UP) && 265 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 266 return -ENETDOWN; 267 268 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) && 269 !vlan_dev_inherit_address(dev, real_dev)) { 270 err = dev_uc_add(real_dev, dev->dev_addr); 271 if (err < 0) 272 goto out; 273 } 274 275 if (dev->flags & IFF_ALLMULTI) { 276 err = dev_set_allmulti(real_dev, 1); 277 if (err < 0) 278 goto del_unicast; 279 } 280 if (dev->flags & IFF_PROMISC) { 281 err = dev_set_promiscuity(real_dev, 1); 282 if (err < 0) 283 goto clear_allmulti; 284 } 285 286 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); 287 288 if (vlan->flags & VLAN_FLAG_GVRP) 289 vlan_gvrp_request_join(dev); 290 291 if (vlan->flags & VLAN_FLAG_MVRP) 292 vlan_mvrp_request_join(dev); 293 294 if (netif_carrier_ok(real_dev) && 295 !(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 296 netif_carrier_on(dev); 297 return 0; 298 299clear_allmulti: 300 if (dev->flags & IFF_ALLMULTI) 301 dev_set_allmulti(real_dev, -1); 302del_unicast: 303 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 304 dev_uc_del(real_dev, dev->dev_addr); 305out: 306 netif_carrier_off(dev); 307 return err; 308} 309 310static 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 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 326 netif_carrier_off(dev); 327 return 0; 328} 329 330static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 331{ 332 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 333 struct sockaddr *addr = p; 334 int err; 335 336 if (!is_valid_ether_addr(addr->sa_data)) 337 return -EADDRNOTAVAIL; 338 339 if (!(dev->flags & IFF_UP)) 340 goto out; 341 342 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 343 err = dev_uc_add(real_dev, addr->sa_data); 344 if (err < 0) 345 return err; 346 } 347 348 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 349 dev_uc_del(real_dev, dev->dev_addr); 350 351out: 352 ether_addr_copy(dev->dev_addr, addr->sa_data); 353 return 0; 354} 355 356static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 357{ 358 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 359 const struct net_device_ops *ops = real_dev->netdev_ops; 360 struct ifreq ifrr; 361 int err = -EOPNOTSUPP; 362 363 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 364 ifrr.ifr_ifru = ifr->ifr_ifru; 365 366 switch (cmd) { 367 case SIOCSHWTSTAMP: 368 if (!net_eq(dev_net(dev), dev_net(real_dev))) 369 break; 370 fallthrough; 371 case SIOCGMIIPHY: 372 case SIOCGMIIREG: 373 case SIOCSMIIREG: 374 case SIOCGHWTSTAMP: 375 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 376 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 377 break; 378 } 379 380 if (!err) 381 ifr->ifr_ifru = ifrr.ifr_ifru; 382 383 return err; 384} 385 386static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 387{ 388 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 389 const struct net_device_ops *ops = real_dev->netdev_ops; 390 int err = 0; 391 392 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 393 err = ops->ndo_neigh_setup(real_dev, pa); 394 395 return err; 396} 397 398#if IS_ENABLED(CONFIG_FCOE) 399static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 400 struct scatterlist *sgl, unsigned int sgc) 401{ 402 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 403 const struct net_device_ops *ops = real_dev->netdev_ops; 404 int rc = 0; 405 406 if (ops->ndo_fcoe_ddp_setup) 407 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 408 409 return rc; 410} 411 412static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 413{ 414 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 415 const struct net_device_ops *ops = real_dev->netdev_ops; 416 int len = 0; 417 418 if (ops->ndo_fcoe_ddp_done) 419 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 420 421 return len; 422} 423 424static int vlan_dev_fcoe_enable(struct net_device *dev) 425{ 426 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 427 const struct net_device_ops *ops = real_dev->netdev_ops; 428 int rc = -EINVAL; 429 430 if (ops->ndo_fcoe_enable) 431 rc = ops->ndo_fcoe_enable(real_dev); 432 return rc; 433} 434 435static int vlan_dev_fcoe_disable(struct net_device *dev) 436{ 437 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 438 const struct net_device_ops *ops = real_dev->netdev_ops; 439 int rc = -EINVAL; 440 441 if (ops->ndo_fcoe_disable) 442 rc = ops->ndo_fcoe_disable(real_dev); 443 return rc; 444} 445 446static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 447 struct scatterlist *sgl, unsigned int sgc) 448{ 449 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 450 const struct net_device_ops *ops = real_dev->netdev_ops; 451 int rc = 0; 452 453 if (ops->ndo_fcoe_ddp_target) 454 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 455 456 return rc; 457} 458#endif 459 460#ifdef NETDEV_FCOE_WWNN 461static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) 462{ 463 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 464 const struct net_device_ops *ops = real_dev->netdev_ops; 465 int rc = -EINVAL; 466 467 if (ops->ndo_fcoe_get_wwn) 468 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); 469 return rc; 470} 471#endif 472 473static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 474{ 475 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 476 477 if (dev->flags & IFF_UP) { 478 if (change & IFF_ALLMULTI) 479 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 480 if (change & IFF_PROMISC) 481 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 482 } 483} 484 485static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 486{ 487 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 488 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 489} 490 491/* 492 * vlan network devices have devices nesting below it, and are a special 493 * "super class" of normal network devices; split their locks off into a 494 * separate class since they always nest. 495 */ 496static struct lock_class_key vlan_netdev_xmit_lock_key; 497static struct lock_class_key vlan_netdev_addr_lock_key; 498 499static void vlan_dev_set_lockdep_one(struct net_device *dev, 500 struct netdev_queue *txq, 501 void *unused) 502{ 503 lockdep_set_class(&txq->_xmit_lock, &vlan_netdev_xmit_lock_key); 504} 505 506static void vlan_dev_set_lockdep_class(struct net_device *dev) 507{ 508 lockdep_set_class(&dev->addr_list_lock, 509 &vlan_netdev_addr_lock_key); 510 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, NULL); 511} 512 513static const struct header_ops vlan_header_ops = { 514 .create = vlan_dev_hard_header, 515 .parse = eth_header_parse, 516}; 517 518static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, 519 unsigned short type, 520 const void *daddr, const void *saddr, 521 unsigned int len) 522{ 523 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 524 struct net_device *real_dev = vlan->real_dev; 525 526 if (saddr == NULL) 527 saddr = dev->dev_addr; 528 529 return dev_hard_header(skb, real_dev, type, daddr, saddr, len); 530} 531 532static const struct header_ops vlan_passthru_header_ops = { 533 .create = vlan_passthru_hard_header, 534 .parse = eth_header_parse, 535}; 536 537static struct device_type vlan_type = { 538 .name = "vlan", 539}; 540 541static const struct net_device_ops vlan_netdev_ops; 542 543static int vlan_dev_init(struct net_device *dev) 544{ 545 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 546 struct net_device *real_dev = vlan->real_dev; 547 548 netif_carrier_off(dev); 549 550 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 551 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 552 IFF_MASTER | IFF_SLAVE); 553 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 554 (1<<__LINK_STATE_DORMANT))) | 555 (1<<__LINK_STATE_PRESENT); 556 557 if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING) 558 dev->state |= (1 << __LINK_STATE_NOCARRIER); 559 560 dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | 561 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | 562 NETIF_F_GSO_ENCAP_ALL | 563 NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC | 564 NETIF_F_ALL_FCOE; 565 566 dev->features |= dev->hw_features | NETIF_F_LLTX; 567 dev->gso_max_size = real_dev->gso_max_size; 568 dev->gso_max_segs = real_dev->gso_max_segs; 569 if (dev->features & NETIF_F_VLAN_FEATURES) 570 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); 571 572 dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; 573 dev->hw_enc_features = vlan_tnl_features(real_dev); 574 dev->mpls_features = real_dev->mpls_features; 575 576 /* ipv6 shared card related stuff */ 577 dev->dev_id = real_dev->dev_id; 578 579 if (is_zero_ether_addr(dev->dev_addr)) { 580 ether_addr_copy(dev->dev_addr, real_dev->dev_addr); 581 dev->addr_assign_type = NET_ADDR_STOLEN; 582 } 583 if (is_zero_ether_addr(dev->broadcast)) 584 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 585 586#if IS_ENABLED(CONFIG_FCOE) 587 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 588#endif 589 590 dev->needed_headroom = real_dev->needed_headroom; 591 if (vlan_hw_offload_capable(real_dev->features, vlan->vlan_proto)) { 592 dev->header_ops = &vlan_passthru_header_ops; 593 dev->hard_header_len = real_dev->hard_header_len; 594 } else { 595 dev->header_ops = &vlan_header_ops; 596 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 597 } 598 599 dev->netdev_ops = &vlan_netdev_ops; 600 601 SET_NETDEV_DEVTYPE(dev, &vlan_type); 602 603 vlan_dev_set_lockdep_class(dev); 604 605 vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); 606 if (!vlan->vlan_pcpu_stats) 607 return -ENOMEM; 608 609 /* Get vlan's reference to real_dev */ 610 dev_hold(real_dev); 611 612 return 0; 613} 614 615/* Note: this function might be called multiple times for the same device. */ 616void vlan_dev_uninit(struct net_device *dev) 617{ 618 struct vlan_priority_tci_mapping *pm; 619 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 620 int i; 621 622 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 623 while ((pm = vlan->egress_priority_map[i]) != NULL) { 624 vlan->egress_priority_map[i] = pm->next; 625 kfree(pm); 626 } 627 } 628} 629 630static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 631 netdev_features_t features) 632{ 633 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 634 netdev_features_t old_features = features; 635 netdev_features_t lower_features; 636 637 lower_features = netdev_intersect_features((real_dev->vlan_features | 638 NETIF_F_RXCSUM), 639 real_dev->features); 640 641 /* Add HW_CSUM setting to preserve user ability to control 642 * checksum offload on the vlan device. 643 */ 644 if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)) 645 lower_features |= NETIF_F_HW_CSUM; 646 features = netdev_intersect_features(features, lower_features); 647 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); 648 features |= NETIF_F_LLTX; 649 650 return features; 651} 652 653static int vlan_ethtool_get_link_ksettings(struct net_device *dev, 654 struct ethtool_link_ksettings *cmd) 655{ 656 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 657 658 return __ethtool_get_link_ksettings(vlan->real_dev, cmd); 659} 660 661static void vlan_ethtool_get_drvinfo(struct net_device *dev, 662 struct ethtool_drvinfo *info) 663{ 664 strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); 665 strlcpy(info->version, vlan_version, sizeof(info->version)); 666 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 667} 668 669static int vlan_ethtool_get_ts_info(struct net_device *dev, 670 struct ethtool_ts_info *info) 671{ 672 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 673 const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; 674 struct phy_device *phydev = vlan->real_dev->phydev; 675 676 if (phy_has_tsinfo(phydev)) { 677 return phy_ts_info(phydev, info); 678 } else if (ops->get_ts_info) { 679 return ops->get_ts_info(vlan->real_dev, info); 680 } else { 681 info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | 682 SOF_TIMESTAMPING_SOFTWARE; 683 info->phc_index = -1; 684 } 685 686 return 0; 687} 688 689static void vlan_dev_get_stats64(struct net_device *dev, 690 struct rtnl_link_stats64 *stats) 691{ 692 struct vlan_pcpu_stats *p; 693 u32 rx_errors = 0, tx_dropped = 0; 694 int i; 695 696 for_each_possible_cpu(i) { 697 u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; 698 unsigned int start; 699 700 p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); 701 do { 702 start = u64_stats_fetch_begin_irq(&p->syncp); 703 rxpackets = p->rx_packets; 704 rxbytes = p->rx_bytes; 705 rxmulticast = p->rx_multicast; 706 txpackets = p->tx_packets; 707 txbytes = p->tx_bytes; 708 } while (u64_stats_fetch_retry_irq(&p->syncp, start)); 709 710 stats->rx_packets += rxpackets; 711 stats->rx_bytes += rxbytes; 712 stats->multicast += rxmulticast; 713 stats->tx_packets += txpackets; 714 stats->tx_bytes += txbytes; 715 /* rx_errors & tx_dropped are u32 */ 716 rx_errors += p->rx_errors; 717 tx_dropped += p->tx_dropped; 718 } 719 stats->rx_errors = rx_errors; 720 stats->tx_dropped = tx_dropped; 721} 722 723#ifdef CONFIG_NET_POLL_CONTROLLER 724static void vlan_dev_poll_controller(struct net_device *dev) 725{ 726 return; 727} 728 729static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) 730{ 731 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 732 struct net_device *real_dev = vlan->real_dev; 733 struct netpoll *netpoll; 734 int err = 0; 735 736 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 737 err = -ENOMEM; 738 if (!netpoll) 739 goto out; 740 741 err = __netpoll_setup(netpoll, real_dev); 742 if (err) { 743 kfree(netpoll); 744 goto out; 745 } 746 747 vlan->netpoll = netpoll; 748 749out: 750 return err; 751} 752 753static void vlan_dev_netpoll_cleanup(struct net_device *dev) 754{ 755 struct vlan_dev_priv *vlan= vlan_dev_priv(dev); 756 struct netpoll *netpoll = vlan->netpoll; 757 758 if (!netpoll) 759 return; 760 761 vlan->netpoll = NULL; 762 __netpoll_free(netpoll); 763} 764#endif /* CONFIG_NET_POLL_CONTROLLER */ 765 766static int vlan_dev_get_iflink(const struct net_device *dev) 767{ 768 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 769 770 return real_dev->ifindex; 771} 772 773static const struct ethtool_ops vlan_ethtool_ops = { 774 .get_link_ksettings = vlan_ethtool_get_link_ksettings, 775 .get_drvinfo = vlan_ethtool_get_drvinfo, 776 .get_link = ethtool_op_get_link, 777 .get_ts_info = vlan_ethtool_get_ts_info, 778}; 779 780static const struct net_device_ops vlan_netdev_ops = { 781 .ndo_change_mtu = vlan_dev_change_mtu, 782 .ndo_init = vlan_dev_init, 783 .ndo_uninit = vlan_dev_uninit, 784 .ndo_open = vlan_dev_open, 785 .ndo_stop = vlan_dev_stop, 786 .ndo_start_xmit = vlan_dev_hard_start_xmit, 787 .ndo_validate_addr = eth_validate_addr, 788 .ndo_set_mac_address = vlan_dev_set_mac_address, 789 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 790 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 791 .ndo_do_ioctl = vlan_dev_ioctl, 792 .ndo_neigh_setup = vlan_dev_neigh_setup, 793 .ndo_get_stats64 = vlan_dev_get_stats64, 794#if IS_ENABLED(CONFIG_FCOE) 795 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 796 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 797 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 798 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 799 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 800#endif 801#ifdef NETDEV_FCOE_WWNN 802 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 803#endif 804#ifdef CONFIG_NET_POLL_CONTROLLER 805 .ndo_poll_controller = vlan_dev_poll_controller, 806 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 807 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 808#endif 809 .ndo_fix_features = vlan_dev_fix_features, 810 .ndo_get_iflink = vlan_dev_get_iflink, 811}; 812 813static void vlan_dev_free(struct net_device *dev) 814{ 815 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 816 817 free_percpu(vlan->vlan_pcpu_stats); 818 vlan->vlan_pcpu_stats = NULL; 819 820 /* Get rid of the vlan's reference to real_dev */ 821 dev_put(vlan->real_dev); 822} 823 824void vlan_setup(struct net_device *dev) 825{ 826 ether_setup(dev); 827 828 dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE; 829 dev->priv_flags |= IFF_UNICAST_FLT; 830 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 831 netif_keep_dst(dev); 832 833 dev->netdev_ops = &vlan_netdev_ops; 834 dev->needs_free_netdev = true; 835 dev->priv_destructor = vlan_dev_free; 836 dev->ethtool_ops = &vlan_ethtool_ops; 837 838 dev->min_mtu = 0; 839 dev->max_mtu = ETH_MAX_MTU; 840 841 eth_zero_addr(dev->broadcast); 842} 843