1/* 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: 10 * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; 11 * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; 12 * Correct all the locking - David S. Miller <davem@redhat.com>; 13 * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation; either version 18 * 2 of the License, or (at your option) any later version. 19 */ 20 21#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 22 23#include <linux/capability.h> 24#include <linux/module.h> 25#include <linux/netdevice.h> 26#include <linux/skbuff.h> 27#include <linux/slab.h> 28#include <linux/init.h> 29#include <linux/rculist.h> 30#include <net/p8022.h> 31#include <net/arp.h> 32#include <linux/rtnetlink.h> 33#include <linux/notifier.h> 34#include <net/rtnetlink.h> 35#include <net/net_namespace.h> 36#include <net/netns/generic.h> 37#include <asm/uaccess.h> 38 39#include <linux/if_vlan.h> 40#include "vlan.h" 41#include "vlanproc.h" 42 43#define DRV_VERSION "1.8" 44 45/* Global VLAN variables */ 46 47int vlan_net_id __read_mostly; 48 49const char vlan_fullname[] = "802.1Q VLAN Support"; 50const char vlan_version[] = DRV_VERSION; 51 52/* End of global variables definitions. */ 53 54static int vlan_group_prealloc_vid(struct vlan_group *vg, 55 __be16 vlan_proto, u16 vlan_id) 56{ 57 struct net_device **array; 58 unsigned int pidx, vidx; 59 unsigned int size; 60 61 ASSERT_RTNL(); 62 63 pidx = vlan_proto_idx(vlan_proto); 64 vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; 65 array = vg->vlan_devices_arrays[pidx][vidx]; 66 if (array != NULL) 67 return 0; 68 69 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; 70 array = kzalloc(size, GFP_KERNEL); 71 if (array == NULL) 72 return -ENOBUFS; 73 74 vg->vlan_devices_arrays[pidx][vidx] = array; 75 return 0; 76} 77 78void unregister_vlan_dev(struct net_device *dev, struct list_head *head) 79{ 80 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 81 struct net_device *real_dev = vlan->real_dev; 82 struct vlan_info *vlan_info; 83 struct vlan_group *grp; 84 u16 vlan_id = vlan->vlan_id; 85 86 ASSERT_RTNL(); 87 88 vlan_info = rtnl_dereference(real_dev->vlan_info); 89 BUG_ON(!vlan_info); 90 91 grp = &vlan_info->grp; 92 93 grp->nr_vlan_devs--; 94 95 if (vlan->flags & VLAN_FLAG_MVRP) 96 vlan_mvrp_request_leave(dev); 97 if (vlan->flags & VLAN_FLAG_GVRP) 98 vlan_gvrp_request_leave(dev); 99 100 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); 101 102 netdev_upper_dev_unlink(real_dev, dev); 103 /* Because unregister_netdevice_queue() makes sure at least one rcu 104 * grace period is respected before device freeing, 105 * we dont need to call synchronize_net() here. 106 */ 107 unregister_netdevice_queue(dev, head); 108 109 if (grp->nr_vlan_devs == 0) { 110 vlan_mvrp_uninit_applicant(real_dev); 111 vlan_gvrp_uninit_applicant(real_dev); 112 } 113 114 /* Take it out of our own structures, but be sure to interlock with 115 * HW accelerating devices or SW vlan input packet processing if 116 * VLAN is not 0 (leave it there for 802.1p). 117 */ 118 if (vlan_id) 119 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 120 121 /* Get rid of the vlan's reference to real_dev */ 122 dev_put(real_dev); 123} 124 125int vlan_check_real_dev(struct net_device *real_dev, 126 __be16 protocol, u16 vlan_id) 127{ 128 const char *name = real_dev->name; 129 130 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 131 pr_info("VLANs not supported on %s\n", name); 132 return -EOPNOTSUPP; 133 } 134 135 if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) 136 return -EEXIST; 137 138 return 0; 139} 140 141int register_vlan_dev(struct net_device *dev) 142{ 143 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 144 struct net_device *real_dev = vlan->real_dev; 145 u16 vlan_id = vlan->vlan_id; 146 struct vlan_info *vlan_info; 147 struct vlan_group *grp; 148 int err; 149 150 err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); 151 if (err) 152 return err; 153 154 vlan_info = rtnl_dereference(real_dev->vlan_info); 155 /* vlan_info should be there now. vlan_vid_add took care of it */ 156 BUG_ON(!vlan_info); 157 158 grp = &vlan_info->grp; 159 if (grp->nr_vlan_devs == 0) { 160 err = vlan_gvrp_init_applicant(real_dev); 161 if (err < 0) 162 goto out_vid_del; 163 err = vlan_mvrp_init_applicant(real_dev); 164 if (err < 0) 165 goto out_uninit_gvrp; 166 } 167 168 err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); 169 if (err < 0) 170 goto out_uninit_mvrp; 171 172 vlan->nest_level = dev_get_nest_level(real_dev, is_vlan_dev) + 1; 173 err = register_netdevice(dev); 174 if (err < 0) 175 goto out_uninit_mvrp; 176 177 err = netdev_upper_dev_link(real_dev, dev); 178 if (err) 179 goto out_unregister_netdev; 180 181 /* Account for reference in struct vlan_dev_priv */ 182 dev_hold(real_dev); 183 184 netif_stacked_transfer_operstate(real_dev, dev); 185 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ 186 187 /* So, got the sucker initialized, now lets place 188 * it into our local structure. 189 */ 190 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); 191 grp->nr_vlan_devs++; 192 193 return 0; 194 195out_unregister_netdev: 196 unregister_netdevice(dev); 197out_uninit_mvrp: 198 if (grp->nr_vlan_devs == 0) 199 vlan_mvrp_uninit_applicant(real_dev); 200out_uninit_gvrp: 201 if (grp->nr_vlan_devs == 0) 202 vlan_gvrp_uninit_applicant(real_dev); 203out_vid_del: 204 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 205 return err; 206} 207 208/* Attach a VLAN device to a mac address (ie Ethernet Card). 209 * Returns 0 if the device was created or a negative error code otherwise. 210 */ 211static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) 212{ 213 struct net_device *new_dev; 214 struct vlan_dev_priv *vlan; 215 struct net *net = dev_net(real_dev); 216 struct vlan_net *vn = net_generic(net, vlan_net_id); 217 char name[IFNAMSIZ]; 218 int err; 219 220 if (vlan_id >= VLAN_VID_MASK) 221 return -ERANGE; 222 223 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id); 224 if (err < 0) 225 return err; 226 227 /* Gotta set up the fields for the device. */ 228 switch (vn->name_type) { 229 case VLAN_NAME_TYPE_RAW_PLUS_VID: 230 /* name will look like: eth1.0005 */ 231 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); 232 break; 233 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 234 /* Put our vlan.VID in the name. 235 * Name will look like: vlan5 236 */ 237 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); 238 break; 239 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 240 /* Put our vlan.VID in the name. 241 * Name will look like: eth0.5 242 */ 243 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); 244 break; 245 case VLAN_NAME_TYPE_PLUS_VID: 246 /* Put our vlan.VID in the name. 247 * Name will look like: vlan0005 248 */ 249 default: 250 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); 251 } 252 253 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, 254 NET_NAME_UNKNOWN, vlan_setup); 255 256 if (new_dev == NULL) 257 return -ENOBUFS; 258 259 dev_net_set(new_dev, net); 260 /* need 4 bytes for extra VLAN header info, 261 * hope the underlying device can handle it. 262 */ 263 new_dev->mtu = real_dev->mtu; 264 new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT); 265 266 vlan = vlan_dev_priv(new_dev); 267 vlan->vlan_proto = htons(ETH_P_8021Q); 268 vlan->vlan_id = vlan_id; 269 vlan->real_dev = real_dev; 270 vlan->dent = NULL; 271 vlan->flags = VLAN_FLAG_REORDER_HDR; 272 273 new_dev->rtnl_link_ops = &vlan_link_ops; 274 err = register_vlan_dev(new_dev); 275 if (err < 0) 276 goto out_free_newdev; 277 278 return 0; 279 280out_free_newdev: 281 free_netdev(new_dev); 282 return err; 283} 284 285static void vlan_sync_address(struct net_device *dev, 286 struct net_device *vlandev) 287{ 288 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 289 290 /* May be called without an actual change */ 291 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) 292 return; 293 294 /* vlan address was different from the old address and is equal to 295 * the new address */ 296 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 297 ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 298 dev_uc_del(dev, vlandev->dev_addr); 299 300 /* vlan address was equal to the old address and is different from 301 * the new address */ 302 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 303 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 304 dev_uc_add(dev, vlandev->dev_addr); 305 306 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); 307} 308 309static void vlan_transfer_features(struct net_device *dev, 310 struct net_device *vlandev) 311{ 312 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 313 314 vlandev->gso_max_size = dev->gso_max_size; 315 316 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) 317 vlandev->hard_header_len = dev->hard_header_len; 318 else 319 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 320 321#if IS_ENABLED(CONFIG_FCOE) 322 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 323#endif 324 325 netdev_update_features(vlandev); 326} 327 328static int __vlan_device_event(struct net_device *dev, unsigned long event) 329{ 330 int err = 0; 331 332 switch (event) { 333 case NETDEV_CHANGENAME: 334 vlan_proc_rem_dev(dev); 335 err = vlan_proc_add_dev(dev); 336 break; 337 case NETDEV_REGISTER: 338 err = vlan_proc_add_dev(dev); 339 break; 340 case NETDEV_UNREGISTER: 341 vlan_proc_rem_dev(dev); 342 break; 343 } 344 345 return err; 346} 347 348static int vlan_device_event(struct notifier_block *unused, unsigned long event, 349 void *ptr) 350{ 351 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 352 struct vlan_group *grp; 353 struct vlan_info *vlan_info; 354 int i, flgs; 355 struct net_device *vlandev; 356 struct vlan_dev_priv *vlan; 357 bool last = false; 358 LIST_HEAD(list); 359 360 if (is_vlan_dev(dev)) { 361 int err = __vlan_device_event(dev, event); 362 363 if (err) 364 return notifier_from_errno(err); 365 } 366 367 if ((event == NETDEV_UP) && 368 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 369 pr_info("adding VLAN 0 to HW filter on device %s\n", 370 dev->name); 371 vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 372 } 373 374 vlan_info = rtnl_dereference(dev->vlan_info); 375 if (!vlan_info) 376 goto out; 377 grp = &vlan_info->grp; 378 379 /* It is OK that we do not hold the group lock right now, 380 * as we run under the RTNL lock. 381 */ 382 383 switch (event) { 384 case NETDEV_CHANGE: 385 /* Propagate real device state to vlan devices */ 386 vlan_group_for_each_dev(grp, i, vlandev) 387 netif_stacked_transfer_operstate(dev, vlandev); 388 break; 389 390 case NETDEV_CHANGEADDR: 391 /* Adjust unicast filters on underlying device */ 392 vlan_group_for_each_dev(grp, i, vlandev) { 393 flgs = vlandev->flags; 394 if (!(flgs & IFF_UP)) 395 continue; 396 397 vlan_sync_address(dev, vlandev); 398 } 399 break; 400 401 case NETDEV_CHANGEMTU: 402 vlan_group_for_each_dev(grp, i, vlandev) { 403 if (vlandev->mtu <= dev->mtu) 404 continue; 405 406 dev_set_mtu(vlandev, dev->mtu); 407 } 408 break; 409 410 case NETDEV_FEAT_CHANGE: 411 /* Propagate device features to underlying device */ 412 vlan_group_for_each_dev(grp, i, vlandev) 413 vlan_transfer_features(dev, vlandev); 414 break; 415 416 case NETDEV_DOWN: { 417 struct net_device *tmp; 418 LIST_HEAD(close_list); 419 420 if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) 421 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 422 423 /* Put all VLANs for this dev in the down state too. */ 424 vlan_group_for_each_dev(grp, i, vlandev) { 425 flgs = vlandev->flags; 426 if (!(flgs & IFF_UP)) 427 continue; 428 429 vlan = vlan_dev_priv(vlandev); 430 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 431 list_add(&vlandev->close_list, &close_list); 432 } 433 434 dev_close_many(&close_list, false); 435 436 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 437 netif_stacked_transfer_operstate(dev, vlandev); 438 list_del_init(&vlandev->close_list); 439 } 440 list_del(&close_list); 441 break; 442 } 443 case NETDEV_UP: 444 /* Put all VLANs for this dev in the up state too. */ 445 vlan_group_for_each_dev(grp, i, vlandev) { 446 flgs = dev_get_flags(vlandev); 447 if (flgs & IFF_UP) 448 continue; 449 450 vlan = vlan_dev_priv(vlandev); 451 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 452 dev_change_flags(vlandev, flgs | IFF_UP); 453 netif_stacked_transfer_operstate(dev, vlandev); 454 } 455 break; 456 457 case NETDEV_UNREGISTER: 458 /* twiddle thumbs on netns device moves */ 459 if (dev->reg_state != NETREG_UNREGISTERING) 460 break; 461 462 vlan_group_for_each_dev(grp, i, vlandev) { 463 /* removal of last vid destroys vlan_info, abort 464 * afterwards */ 465 if (vlan_info->nr_vids == 1) 466 last = true; 467 468 unregister_vlan_dev(vlandev, &list); 469 if (last) 470 break; 471 } 472 unregister_netdevice_many(&list); 473 break; 474 475 case NETDEV_PRE_TYPE_CHANGE: 476 /* Forbid underlaying device to change its type. */ 477 if (vlan_uses_dev(dev)) 478 return NOTIFY_BAD; 479 break; 480 481 case NETDEV_NOTIFY_PEERS: 482 case NETDEV_BONDING_FAILOVER: 483 case NETDEV_RESEND_IGMP: 484 /* Propagate to vlan devices */ 485 vlan_group_for_each_dev(grp, i, vlandev) 486 call_netdevice_notifiers(event, vlandev); 487 break; 488 } 489 490out: 491 return NOTIFY_DONE; 492} 493 494static struct notifier_block vlan_notifier_block __read_mostly = { 495 .notifier_call = vlan_device_event, 496}; 497 498/* 499 * VLAN IOCTL handler. 500 * o execute requested action or pass command to the device driver 501 * arg is really a struct vlan_ioctl_args __user *. 502 */ 503static int vlan_ioctl_handler(struct net *net, void __user *arg) 504{ 505 int err; 506 struct vlan_ioctl_args args; 507 struct net_device *dev = NULL; 508 509 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 510 return -EFAULT; 511 512 /* Null terminate this sucker, just in case. */ 513 args.device1[23] = 0; 514 args.u.device2[23] = 0; 515 516 rtnl_lock(); 517 518 switch (args.cmd) { 519 case SET_VLAN_INGRESS_PRIORITY_CMD: 520 case SET_VLAN_EGRESS_PRIORITY_CMD: 521 case SET_VLAN_FLAG_CMD: 522 case ADD_VLAN_CMD: 523 case DEL_VLAN_CMD: 524 case GET_VLAN_REALDEV_NAME_CMD: 525 case GET_VLAN_VID_CMD: 526 err = -ENODEV; 527 dev = __dev_get_by_name(net, args.device1); 528 if (!dev) 529 goto out; 530 531 err = -EINVAL; 532 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 533 goto out; 534 } 535 536 switch (args.cmd) { 537 case SET_VLAN_INGRESS_PRIORITY_CMD: 538 err = -EPERM; 539 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 540 break; 541 vlan_dev_set_ingress_priority(dev, 542 args.u.skb_priority, 543 args.vlan_qos); 544 err = 0; 545 break; 546 547 case SET_VLAN_EGRESS_PRIORITY_CMD: 548 err = -EPERM; 549 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 550 break; 551 err = vlan_dev_set_egress_priority(dev, 552 args.u.skb_priority, 553 args.vlan_qos); 554 break; 555 556 case SET_VLAN_FLAG_CMD: 557 err = -EPERM; 558 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 559 break; 560 err = vlan_dev_change_flags(dev, 561 args.vlan_qos ? args.u.flag : 0, 562 args.u.flag); 563 break; 564 565 case SET_VLAN_NAME_TYPE_CMD: 566 err = -EPERM; 567 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 568 break; 569 if ((args.u.name_type >= 0) && 570 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { 571 struct vlan_net *vn; 572 573 vn = net_generic(net, vlan_net_id); 574 vn->name_type = args.u.name_type; 575 err = 0; 576 } else { 577 err = -EINVAL; 578 } 579 break; 580 581 case ADD_VLAN_CMD: 582 err = -EPERM; 583 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 584 break; 585 err = register_vlan_device(dev, args.u.VID); 586 break; 587 588 case DEL_VLAN_CMD: 589 err = -EPERM; 590 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 591 break; 592 unregister_vlan_dev(dev, NULL); 593 err = 0; 594 break; 595 596 case GET_VLAN_REALDEV_NAME_CMD: 597 err = 0; 598 vlan_dev_get_realdev_name(dev, args.u.device2); 599 if (copy_to_user(arg, &args, 600 sizeof(struct vlan_ioctl_args))) 601 err = -EFAULT; 602 break; 603 604 case GET_VLAN_VID_CMD: 605 err = 0; 606 args.u.VID = vlan_dev_vlan_id(dev); 607 if (copy_to_user(arg, &args, 608 sizeof(struct vlan_ioctl_args))) 609 err = -EFAULT; 610 break; 611 612 default: 613 err = -EOPNOTSUPP; 614 break; 615 } 616out: 617 rtnl_unlock(); 618 return err; 619} 620 621static struct sk_buff **vlan_gro_receive(struct sk_buff **head, 622 struct sk_buff *skb) 623{ 624 struct sk_buff *p, **pp = NULL; 625 struct vlan_hdr *vhdr; 626 unsigned int hlen, off_vlan; 627 const struct packet_offload *ptype; 628 __be16 type; 629 int flush = 1; 630 631 off_vlan = skb_gro_offset(skb); 632 hlen = off_vlan + sizeof(*vhdr); 633 vhdr = skb_gro_header_fast(skb, off_vlan); 634 if (skb_gro_header_hard(skb, hlen)) { 635 vhdr = skb_gro_header_slow(skb, hlen, off_vlan); 636 if (unlikely(!vhdr)) 637 goto out; 638 } 639 640 type = vhdr->h_vlan_encapsulated_proto; 641 642 rcu_read_lock(); 643 ptype = gro_find_receive_by_type(type); 644 if (!ptype) 645 goto out_unlock; 646 647 flush = 0; 648 649 for (p = *head; p; p = p->next) { 650 struct vlan_hdr *vhdr2; 651 652 if (!NAPI_GRO_CB(p)->same_flow) 653 continue; 654 655 vhdr2 = (struct vlan_hdr *)(p->data + off_vlan); 656 if (compare_vlan_header(vhdr, vhdr2)) 657 NAPI_GRO_CB(p)->same_flow = 0; 658 } 659 660 skb_gro_pull(skb, sizeof(*vhdr)); 661 skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr)); 662 pp = ptype->callbacks.gro_receive(head, skb); 663 664out_unlock: 665 rcu_read_unlock(); 666out: 667 NAPI_GRO_CB(skb)->flush |= flush; 668 669 return pp; 670} 671 672static int vlan_gro_complete(struct sk_buff *skb, int nhoff) 673{ 674 struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff); 675 __be16 type = vhdr->h_vlan_encapsulated_proto; 676 struct packet_offload *ptype; 677 int err = -ENOENT; 678 679 rcu_read_lock(); 680 ptype = gro_find_complete_by_type(type); 681 if (ptype) 682 err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr)); 683 684 rcu_read_unlock(); 685 return err; 686} 687 688static struct packet_offload vlan_packet_offloads[] __read_mostly = { 689 { 690 .type = cpu_to_be16(ETH_P_8021Q), 691 .priority = 10, 692 .callbacks = { 693 .gro_receive = vlan_gro_receive, 694 .gro_complete = vlan_gro_complete, 695 }, 696 }, 697 { 698 .type = cpu_to_be16(ETH_P_8021AD), 699 .priority = 10, 700 .callbacks = { 701 .gro_receive = vlan_gro_receive, 702 .gro_complete = vlan_gro_complete, 703 }, 704 }, 705}; 706 707static int __net_init vlan_init_net(struct net *net) 708{ 709 struct vlan_net *vn = net_generic(net, vlan_net_id); 710 int err; 711 712 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 713 714 err = vlan_proc_init(net); 715 716 return err; 717} 718 719static void __net_exit vlan_exit_net(struct net *net) 720{ 721 vlan_proc_cleanup(net); 722} 723 724static struct pernet_operations vlan_net_ops = { 725 .init = vlan_init_net, 726 .exit = vlan_exit_net, 727 .id = &vlan_net_id, 728 .size = sizeof(struct vlan_net), 729}; 730 731static int __init vlan_proto_init(void) 732{ 733 int err; 734 unsigned int i; 735 736 pr_info("%s v%s\n", vlan_fullname, vlan_version); 737 738 err = register_pernet_subsys(&vlan_net_ops); 739 if (err < 0) 740 goto err0; 741 742 err = register_netdevice_notifier(&vlan_notifier_block); 743 if (err < 0) 744 goto err2; 745 746 err = vlan_gvrp_init(); 747 if (err < 0) 748 goto err3; 749 750 err = vlan_mvrp_init(); 751 if (err < 0) 752 goto err4; 753 754 err = vlan_netlink_init(); 755 if (err < 0) 756 goto err5; 757 758 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) 759 dev_add_offload(&vlan_packet_offloads[i]); 760 761 vlan_ioctl_set(vlan_ioctl_handler); 762 return 0; 763 764err5: 765 vlan_mvrp_uninit(); 766err4: 767 vlan_gvrp_uninit(); 768err3: 769 unregister_netdevice_notifier(&vlan_notifier_block); 770err2: 771 unregister_pernet_subsys(&vlan_net_ops); 772err0: 773 return err; 774} 775 776static void __exit vlan_cleanup_module(void) 777{ 778 unsigned int i; 779 780 vlan_ioctl_set(NULL); 781 782 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) 783 dev_remove_offload(&vlan_packet_offloads[i]); 784 785 vlan_netlink_fini(); 786 787 unregister_netdevice_notifier(&vlan_notifier_block); 788 789 unregister_pernet_subsys(&vlan_net_ops); 790 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 791 792 vlan_mvrp_uninit(); 793 vlan_gvrp_uninit(); 794} 795 796module_init(vlan_proto_init); 797module_exit(vlan_cleanup_module); 798 799MODULE_LICENSE("GPL"); 800MODULE_VERSION(DRV_VERSION); 801