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/etherdevice.h> 30#include <linux/ethtool.h> 31#include <net/arp.h> 32 33#include "vlan.h" 34#include "vlanproc.h" 35#include <linux/if_vlan.h> 36#include <linux/netpoll.h> 37 38/* 39 * Rebuild the Ethernet MAC header. This is called after an ARP 40 * (or in future other address resolution) has completed on this 41 * sk_buff. We now let ARP fill in the other fields. 42 * 43 * This routine CANNOT use cached dst->neigh! 44 * Really, it is used only when dst->neigh is wrong. 45 * 46 * TODO: This needs a checkup, I'm ignorant here. --BLG 47 */ 48static int vlan_dev_rebuild_header(struct sk_buff *skb) 49{ 50 struct net_device *dev = skb->dev; 51 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 52 53 switch (veth->h_vlan_encapsulated_proto) { 54#ifdef CONFIG_INET 55 case htons(ETH_P_IP): 56 57 /* TODO: Confirm this will work with VLAN headers... */ 58 return arp_find(veth->h_dest, skb); 59#endif 60 default: 61 pr_debug("%s: unable to resolve type %X addresses\n", 62 dev->name, ntohs(veth->h_vlan_encapsulated_proto)); 63 64 ether_addr_copy(veth->h_source, dev->dev_addr); 65 break; 66 } 67 68 return 0; 69} 70 71/* 72 * Create the VLAN header for an arbitrary protocol layer 73 * 74 * saddr=NULL means use device source address 75 * daddr=NULL means leave destination address (eg unresolved arp) 76 * 77 * This is called when the SKB is moving down the stack towards the 78 * physical devices. 79 */ 80static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 81 unsigned short type, 82 const void *daddr, const void *saddr, 83 unsigned int len) 84{ 85 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 86 struct vlan_hdr *vhdr; 87 unsigned int vhdrlen = 0; 88 u16 vlan_tci = 0; 89 int rc; 90 91 if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { 92 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); 93 94 vlan_tci = vlan->vlan_id; 95 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); 96 vhdr->h_vlan_TCI = htons(vlan_tci); 97 98 /* 99 * Set the protocol type. For a packet of type ETH_P_802_3/2 we 100 * put the length in here instead. 101 */ 102 if (type != ETH_P_802_3 && type != ETH_P_802_2) 103 vhdr->h_vlan_encapsulated_proto = htons(type); 104 else 105 vhdr->h_vlan_encapsulated_proto = htons(len); 106 107 skb->protocol = vlan->vlan_proto; 108 type = ntohs(vlan->vlan_proto); 109 vhdrlen = VLAN_HLEN; 110 } 111 112 /* Before delegating work to the lower layer, enter our MAC-address */ 113 if (saddr == NULL) 114 saddr = dev->dev_addr; 115 116 /* Now make the underlying real hard header */ 117 dev = vlan->real_dev; 118 rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); 119 if (rc > 0) 120 rc += vhdrlen; 121 return rc; 122} 123 124static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) 125{ 126#ifdef CONFIG_NET_POLL_CONTROLLER 127 if (vlan->netpoll) 128 netpoll_send_skb(vlan->netpoll, skb); 129#else 130 BUG(); 131#endif 132 return NETDEV_TX_OK; 133} 134 135static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, 136 struct net_device *dev) 137{ 138 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 139 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); 140 unsigned int len; 141 int ret; 142 143 /* Handle non-VLAN frames if they are sent to us, for example by DHCP. 144 * 145 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING 146 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... 147 */ 148 if (veth->h_vlan_proto != vlan->vlan_proto || 149 vlan->flags & VLAN_FLAG_REORDER_HDR) { 150 u16 vlan_tci; 151 vlan_tci = vlan->vlan_id; 152 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); 153 skb = __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); 154 } 155 156 skb->dev = vlan->real_dev; 157 len = skb->len; 158 if (unlikely(netpoll_tx_running(dev))) 159 return vlan_netpoll_send_skb(vlan, skb); 160 161 ret = dev_queue_xmit(skb); 162 163 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { 164 struct vlan_pcpu_stats *stats; 165 166 stats = this_cpu_ptr(vlan->vlan_pcpu_stats); 167 u64_stats_update_begin(&stats->syncp); 168 stats->tx_packets++; 169 stats->tx_bytes += len; 170 u64_stats_update_end(&stats->syncp); 171 } else { 172 this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); 173 } 174 175 return ret; 176} 177 178static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) 179{ 180 /* TODO: gotta make sure the underlying layer can handle it, 181 * maybe an IFF_VLAN_CAPABLE flag for devices? 182 */ 183 if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) 184 return -ERANGE; 185 186 dev->mtu = new_mtu; 187 188 return 0; 189} 190 191void vlan_dev_set_ingress_priority(const struct net_device *dev, 192 u32 skb_prio, u16 vlan_prio) 193{ 194 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 195 196 if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) 197 vlan->nr_ingress_mappings--; 198 else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) 199 vlan->nr_ingress_mappings++; 200 201 vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; 202} 203 204int vlan_dev_set_egress_priority(const struct net_device *dev, 205 u32 skb_prio, u16 vlan_prio) 206{ 207 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 208 struct vlan_priority_tci_mapping *mp = NULL; 209 struct vlan_priority_tci_mapping *np; 210 u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; 211 212 /* See if a priority mapping exists.. */ 213 mp = vlan->egress_priority_map[skb_prio & 0xF]; 214 while (mp) { 215 if (mp->priority == skb_prio) { 216 if (mp->vlan_qos && !vlan_qos) 217 vlan->nr_egress_mappings--; 218 else if (!mp->vlan_qos && vlan_qos) 219 vlan->nr_egress_mappings++; 220 mp->vlan_qos = vlan_qos; 221 return 0; 222 } 223 mp = mp->next; 224 } 225 226 /* Create a new mapping then. */ 227 mp = vlan->egress_priority_map[skb_prio & 0xF]; 228 np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); 229 if (!np) 230 return -ENOBUFS; 231 232 np->next = mp; 233 np->priority = skb_prio; 234 np->vlan_qos = vlan_qos; 235 /* Before inserting this element in hash table, make sure all its fields 236 * are committed to memory. 237 * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() 238 */ 239 smp_wmb(); 240 vlan->egress_priority_map[skb_prio & 0xF] = np; 241 if (vlan_qos) 242 vlan->nr_egress_mappings++; 243 return 0; 244} 245 246/* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ 247int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) 248{ 249 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 250 u32 old_flags = vlan->flags; 251 252 if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | 253 VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) 254 return -EINVAL; 255 256 vlan->flags = (old_flags & ~mask) | (flags & mask); 257 258 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { 259 if (vlan->flags & VLAN_FLAG_GVRP) 260 vlan_gvrp_request_join(dev); 261 else 262 vlan_gvrp_request_leave(dev); 263 } 264 265 if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { 266 if (vlan->flags & VLAN_FLAG_MVRP) 267 vlan_mvrp_request_join(dev); 268 else 269 vlan_mvrp_request_leave(dev); 270 } 271 return 0; 272} 273 274void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) 275{ 276 strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); 277} 278 279static int vlan_dev_open(struct net_device *dev) 280{ 281 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 282 struct net_device *real_dev = vlan->real_dev; 283 int err; 284 285 if (!(real_dev->flags & IFF_UP) && 286 !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 287 return -ENETDOWN; 288 289 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { 290 err = dev_uc_add(real_dev, dev->dev_addr); 291 if (err < 0) 292 goto out; 293 } 294 295 if (dev->flags & IFF_ALLMULTI) { 296 err = dev_set_allmulti(real_dev, 1); 297 if (err < 0) 298 goto del_unicast; 299 } 300 if (dev->flags & IFF_PROMISC) { 301 err = dev_set_promiscuity(real_dev, 1); 302 if (err < 0) 303 goto clear_allmulti; 304 } 305 306 ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); 307 308 if (vlan->flags & VLAN_FLAG_GVRP) 309 vlan_gvrp_request_join(dev); 310 311 if (vlan->flags & VLAN_FLAG_MVRP) 312 vlan_mvrp_request_join(dev); 313 314 if (netif_carrier_ok(real_dev)) 315 netif_carrier_on(dev); 316 return 0; 317 318clear_allmulti: 319 if (dev->flags & IFF_ALLMULTI) 320 dev_set_allmulti(real_dev, -1); 321del_unicast: 322 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 323 dev_uc_del(real_dev, dev->dev_addr); 324out: 325 netif_carrier_off(dev); 326 return err; 327} 328 329static int vlan_dev_stop(struct net_device *dev) 330{ 331 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 332 struct net_device *real_dev = vlan->real_dev; 333 334 dev_mc_unsync(real_dev, dev); 335 dev_uc_unsync(real_dev, dev); 336 if (dev->flags & IFF_ALLMULTI) 337 dev_set_allmulti(real_dev, -1); 338 if (dev->flags & IFF_PROMISC) 339 dev_set_promiscuity(real_dev, -1); 340 341 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 342 dev_uc_del(real_dev, dev->dev_addr); 343 344 netif_carrier_off(dev); 345 return 0; 346} 347 348static int vlan_dev_set_mac_address(struct net_device *dev, void *p) 349{ 350 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 351 struct sockaddr *addr = p; 352 int err; 353 354 if (!is_valid_ether_addr(addr->sa_data)) 355 return -EADDRNOTAVAIL; 356 357 if (!(dev->flags & IFF_UP)) 358 goto out; 359 360 if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { 361 err = dev_uc_add(real_dev, addr->sa_data); 362 if (err < 0) 363 return err; 364 } 365 366 if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) 367 dev_uc_del(real_dev, dev->dev_addr); 368 369out: 370 ether_addr_copy(dev->dev_addr, addr->sa_data); 371 return 0; 372} 373 374static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 375{ 376 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 377 const struct net_device_ops *ops = real_dev->netdev_ops; 378 struct ifreq ifrr; 379 int err = -EOPNOTSUPP; 380 381 strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); 382 ifrr.ifr_ifru = ifr->ifr_ifru; 383 384 switch (cmd) { 385 case SIOCGMIIPHY: 386 case SIOCGMIIREG: 387 case SIOCSMIIREG: 388 case SIOCSHWTSTAMP: 389 case SIOCGHWTSTAMP: 390 if (netif_device_present(real_dev) && ops->ndo_do_ioctl) 391 err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); 392 break; 393 } 394 395 if (!err) 396 ifr->ifr_ifru = ifrr.ifr_ifru; 397 398 return err; 399} 400 401static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) 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 err = 0; 406 407 if (netif_device_present(real_dev) && ops->ndo_neigh_setup) 408 err = ops->ndo_neigh_setup(real_dev, pa); 409 410 return err; 411} 412 413#if IS_ENABLED(CONFIG_FCOE) 414static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, 415 struct scatterlist *sgl, unsigned int sgc) 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 rc = 0; 420 421 if (ops->ndo_fcoe_ddp_setup) 422 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); 423 424 return rc; 425} 426 427static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) 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 len = 0; 432 433 if (ops->ndo_fcoe_ddp_done) 434 len = ops->ndo_fcoe_ddp_done(real_dev, xid); 435 436 return len; 437} 438 439static int vlan_dev_fcoe_enable(struct net_device *dev) 440{ 441 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 442 const struct net_device_ops *ops = real_dev->netdev_ops; 443 int rc = -EINVAL; 444 445 if (ops->ndo_fcoe_enable) 446 rc = ops->ndo_fcoe_enable(real_dev); 447 return rc; 448} 449 450static int vlan_dev_fcoe_disable(struct net_device *dev) 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 = -EINVAL; 455 456 if (ops->ndo_fcoe_disable) 457 rc = ops->ndo_fcoe_disable(real_dev); 458 return rc; 459} 460 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 472static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, 473 struct scatterlist *sgl, unsigned int sgc) 474{ 475 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 476 const struct net_device_ops *ops = real_dev->netdev_ops; 477 int rc = 0; 478 479 if (ops->ndo_fcoe_ddp_target) 480 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); 481 482 return rc; 483} 484#endif 485 486static void vlan_dev_change_rx_flags(struct net_device *dev, int change) 487{ 488 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 489 490 if (dev->flags & IFF_UP) { 491 if (change & IFF_ALLMULTI) 492 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); 493 if (change & IFF_PROMISC) 494 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); 495 } 496} 497 498static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) 499{ 500 dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 501 dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); 502} 503 504/* 505 * vlan network devices have devices nesting below it, and are a special 506 * "super class" of normal network devices; split their locks off into a 507 * separate class since they always nest. 508 */ 509static struct lock_class_key vlan_netdev_xmit_lock_key; 510static struct lock_class_key vlan_netdev_addr_lock_key; 511 512static void vlan_dev_set_lockdep_one(struct net_device *dev, 513 struct netdev_queue *txq, 514 void *_subclass) 515{ 516 lockdep_set_class_and_subclass(&txq->_xmit_lock, 517 &vlan_netdev_xmit_lock_key, 518 *(int *)_subclass); 519} 520 521static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) 522{ 523 lockdep_set_class_and_subclass(&dev->addr_list_lock, 524 &vlan_netdev_addr_lock_key, 525 subclass); 526 netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); 527} 528 529static int vlan_dev_get_lock_subclass(struct net_device *dev) 530{ 531 return vlan_dev_priv(dev)->nest_level; 532} 533 534static const struct header_ops vlan_header_ops = { 535 .create = vlan_dev_hard_header, 536 .rebuild = vlan_dev_rebuild_header, 537 .parse = eth_header_parse, 538}; 539 540static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, 541 unsigned short type, 542 const void *daddr, const void *saddr, 543 unsigned int len) 544{ 545 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 546 struct net_device *real_dev = vlan->real_dev; 547 548 if (saddr == NULL) 549 saddr = dev->dev_addr; 550 551 return dev_hard_header(skb, real_dev, type, daddr, saddr, len); 552} 553 554static const struct header_ops vlan_passthru_header_ops = { 555 .create = vlan_passthru_hard_header, 556 .rebuild = dev_rebuild_header, 557 .parse = eth_header_parse, 558}; 559 560static struct device_type vlan_type = { 561 .name = "vlan", 562}; 563 564static const struct net_device_ops vlan_netdev_ops; 565 566static int vlan_dev_init(struct net_device *dev) 567{ 568 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 569 570 netif_carrier_off(dev); 571 572 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 573 dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | 574 IFF_MASTER | IFF_SLAVE); 575 dev->iflink = real_dev->ifindex; 576 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 577 (1<<__LINK_STATE_DORMANT))) | 578 (1<<__LINK_STATE_PRESENT); 579 580 dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | 581 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | 582 NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | 583 NETIF_F_ALL_FCOE; 584 585 dev->features |= real_dev->vlan_features | NETIF_F_LLTX; 586 dev->gso_max_size = real_dev->gso_max_size; 587 if (dev->features & NETIF_F_VLAN_FEATURES) 588 netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); 589 590 591 /* ipv6 shared card related stuff */ 592 dev->dev_id = real_dev->dev_id; 593 594 if (is_zero_ether_addr(dev->dev_addr)) 595 eth_hw_addr_inherit(dev, real_dev); 596 if (is_zero_ether_addr(dev->broadcast)) 597 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); 598 599#if IS_ENABLED(CONFIG_FCOE) 600 dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; 601#endif 602 603 dev->needed_headroom = real_dev->needed_headroom; 604 if (vlan_hw_offload_capable(real_dev->features, 605 vlan_dev_priv(dev)->vlan_proto)) { 606 dev->header_ops = &vlan_passthru_header_ops; 607 dev->hard_header_len = real_dev->hard_header_len; 608 } else { 609 dev->header_ops = &vlan_header_ops; 610 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; 611 } 612 613 dev->netdev_ops = &vlan_netdev_ops; 614 615 SET_NETDEV_DEVTYPE(dev, &vlan_type); 616 617 vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); 618 619 vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); 620 if (!vlan_dev_priv(dev)->vlan_pcpu_stats) 621 return -ENOMEM; 622 623 return 0; 624} 625 626static void vlan_dev_uninit(struct net_device *dev) 627{ 628 struct vlan_priority_tci_mapping *pm; 629 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 630 int i; 631 632 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { 633 while ((pm = vlan->egress_priority_map[i]) != NULL) { 634 vlan->egress_priority_map[i] = pm->next; 635 kfree(pm); 636 } 637 } 638} 639 640static netdev_features_t vlan_dev_fix_features(struct net_device *dev, 641 netdev_features_t features) 642{ 643 struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; 644 netdev_features_t old_features = features; 645 646 features = netdev_intersect_features(features, real_dev->vlan_features); 647 features |= NETIF_F_RXCSUM; 648 features = netdev_intersect_features(features, real_dev->features); 649 650 features |= old_features & NETIF_F_SOFT_FEATURES; 651 features |= NETIF_F_LLTX; 652 653 return features; 654} 655 656static int vlan_ethtool_get_settings(struct net_device *dev, 657 struct ethtool_cmd *cmd) 658{ 659 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 660 661 return __ethtool_get_settings(vlan->real_dev, cmd); 662} 663 664static void vlan_ethtool_get_drvinfo(struct net_device *dev, 665 struct ethtool_drvinfo *info) 666{ 667 strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); 668 strlcpy(info->version, vlan_version, sizeof(info->version)); 669 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 670} 671 672static 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 708static void vlan_dev_poll_controller(struct net_device *dev) 709{ 710 return; 711} 712 713static 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 733out: 734 return err; 735} 736 737static 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 751static const struct ethtool_ops vlan_ethtool_ops = { 752 .get_settings = vlan_ethtool_get_settings, 753 .get_drvinfo = vlan_ethtool_get_drvinfo, 754 .get_link = ethtool_op_get_link, 755}; 756 757static const struct net_device_ops vlan_netdev_ops = { 758 .ndo_change_mtu = vlan_dev_change_mtu, 759 .ndo_init = vlan_dev_init, 760 .ndo_uninit = vlan_dev_uninit, 761 .ndo_open = vlan_dev_open, 762 .ndo_stop = vlan_dev_stop, 763 .ndo_start_xmit = vlan_dev_hard_start_xmit, 764 .ndo_validate_addr = eth_validate_addr, 765 .ndo_set_mac_address = vlan_dev_set_mac_address, 766 .ndo_set_rx_mode = vlan_dev_set_rx_mode, 767 .ndo_change_rx_flags = vlan_dev_change_rx_flags, 768 .ndo_do_ioctl = vlan_dev_ioctl, 769 .ndo_neigh_setup = vlan_dev_neigh_setup, 770 .ndo_get_stats64 = vlan_dev_get_stats64, 771#if IS_ENABLED(CONFIG_FCOE) 772 .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, 773 .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, 774 .ndo_fcoe_enable = vlan_dev_fcoe_enable, 775 .ndo_fcoe_disable = vlan_dev_fcoe_disable, 776 .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, 777 .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, 778#endif 779#ifdef CONFIG_NET_POLL_CONTROLLER 780 .ndo_poll_controller = vlan_dev_poll_controller, 781 .ndo_netpoll_setup = vlan_dev_netpoll_setup, 782 .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, 783#endif 784 .ndo_fix_features = vlan_dev_fix_features, 785 .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, 786}; 787 788static void vlan_dev_free(struct net_device *dev) 789{ 790 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 791 792 free_percpu(vlan->vlan_pcpu_stats); 793 vlan->vlan_pcpu_stats = NULL; 794 free_netdev(dev); 795} 796 797void vlan_setup(struct net_device *dev) 798{ 799 ether_setup(dev); 800 801 dev->priv_flags |= IFF_802_1Q_VLAN; 802 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 803 netif_keep_dst(dev); 804 dev->tx_queue_len = 0; 805 806 dev->netdev_ops = &vlan_netdev_ops; 807 dev->destructor = vlan_dev_free; 808 dev->ethtool_ops = &vlan_ethtool_ops; 809 810 memset(dev->broadcast, 0, ETH_ALEN); 811} 812