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 47 int vlan_net_id __read_mostly; 48 49 const char vlan_fullname[] = "802.1Q VLAN Support"; 50 const char vlan_version[] = DRV_VERSION; 51 52 /* End of global variables definitions. */ 53 54 static 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 78 void 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 } 124 125 int 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 } 140 141 int 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) + 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; 194 195 out_unregister_netdev: 196 unregister_netdevice(dev); 197 out_uninit_mvrp: 198 if (grp->nr_vlan_devs == 0) 199 vlan_mvrp_uninit_applicant(real_dev); 200 out_uninit_gvrp: 201 if (grp->nr_vlan_devs == 0) 202 vlan_gvrp_uninit_applicant(real_dev); 203 out_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 */ 211 static 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; 264 265 vlan = vlan_dev_priv(new_dev); 266 vlan->vlan_proto = htons(ETH_P_8021Q); 267 vlan->vlan_id = vlan_id; 268 vlan->real_dev = real_dev; 269 vlan->dent = NULL; 270 vlan->flags = VLAN_FLAG_REORDER_HDR; 271 272 new_dev->rtnl_link_ops = &vlan_link_ops; 273 err = register_vlan_dev(new_dev); 274 if (err < 0) 275 goto out_free_newdev; 276 277 return 0; 278 279 out_free_newdev: 280 free_netdev(new_dev); 281 return err; 282 } 283 284 static void vlan_sync_address(struct net_device *dev, 285 struct net_device *vlandev) 286 { 287 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 288 289 /* May be called without an actual change */ 290 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) 291 return; 292 293 /* vlan continues to inherit address of lower device */ 294 if (vlan_dev_inherit_address(vlandev, dev)) 295 goto out; 296 297 /* vlan address was different from the old address and is equal to 298 * the new address */ 299 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 300 ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 301 dev_uc_del(dev, vlandev->dev_addr); 302 303 /* vlan address was equal to the old address and is different from 304 * the new address */ 305 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 306 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 307 dev_uc_add(dev, vlandev->dev_addr); 308 309 out: 310 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); 311 } 312 313 static void vlan_transfer_features(struct net_device *dev, 314 struct net_device *vlandev) 315 { 316 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 317 318 vlandev->gso_max_size = dev->gso_max_size; 319 vlandev->gso_max_segs = dev->gso_max_segs; 320 321 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) 322 vlandev->hard_header_len = dev->hard_header_len; 323 else 324 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 325 326 #if IS_ENABLED(CONFIG_FCOE) 327 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 328 #endif 329 330 netdev_update_features(vlandev); 331 } 332 333 static int __vlan_device_event(struct net_device *dev, unsigned long event) 334 { 335 int err = 0; 336 337 switch (event) { 338 case NETDEV_CHANGENAME: 339 vlan_proc_rem_dev(dev); 340 err = vlan_proc_add_dev(dev); 341 break; 342 case NETDEV_REGISTER: 343 err = vlan_proc_add_dev(dev); 344 break; 345 case NETDEV_UNREGISTER: 346 vlan_proc_rem_dev(dev); 347 break; 348 } 349 350 return err; 351 } 352 353 static int vlan_device_event(struct notifier_block *unused, unsigned long event, 354 void *ptr) 355 { 356 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 357 struct vlan_group *grp; 358 struct vlan_info *vlan_info; 359 int i, flgs; 360 struct net_device *vlandev; 361 struct vlan_dev_priv *vlan; 362 bool last = false; 363 LIST_HEAD(list); 364 365 if (is_vlan_dev(dev)) { 366 int err = __vlan_device_event(dev, event); 367 368 if (err) 369 return notifier_from_errno(err); 370 } 371 372 if ((event == NETDEV_UP) && 373 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 374 pr_info("adding VLAN 0 to HW filter on device %s\n", 375 dev->name); 376 vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 377 } 378 379 vlan_info = rtnl_dereference(dev->vlan_info); 380 if (!vlan_info) 381 goto out; 382 grp = &vlan_info->grp; 383 384 /* It is OK that we do not hold the group lock right now, 385 * as we run under the RTNL lock. 386 */ 387 388 switch (event) { 389 case NETDEV_CHANGE: 390 /* Propagate real device state to vlan devices */ 391 vlan_group_for_each_dev(grp, i, vlandev) 392 netif_stacked_transfer_operstate(dev, vlandev); 393 break; 394 395 case NETDEV_CHANGEADDR: 396 /* Adjust unicast filters on underlying device */ 397 vlan_group_for_each_dev(grp, i, vlandev) { 398 flgs = vlandev->flags; 399 if (!(flgs & IFF_UP)) 400 continue; 401 402 vlan_sync_address(dev, vlandev); 403 } 404 break; 405 406 case NETDEV_CHANGEMTU: 407 vlan_group_for_each_dev(grp, i, vlandev) { 408 if (vlandev->mtu <= dev->mtu) 409 continue; 410 411 dev_set_mtu(vlandev, dev->mtu); 412 } 413 break; 414 415 case NETDEV_FEAT_CHANGE: 416 /* Propagate device features to underlying device */ 417 vlan_group_for_each_dev(grp, i, vlandev) 418 vlan_transfer_features(dev, vlandev); 419 break; 420 421 case NETDEV_DOWN: { 422 struct net_device *tmp; 423 LIST_HEAD(close_list); 424 425 if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) 426 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 427 428 /* Put all VLANs for this dev in the down state too. */ 429 vlan_group_for_each_dev(grp, i, vlandev) { 430 flgs = vlandev->flags; 431 if (!(flgs & IFF_UP)) 432 continue; 433 434 vlan = vlan_dev_priv(vlandev); 435 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 436 list_add(&vlandev->close_list, &close_list); 437 } 438 439 dev_close_many(&close_list, false); 440 441 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 442 netif_stacked_transfer_operstate(dev, vlandev); 443 list_del_init(&vlandev->close_list); 444 } 445 list_del(&close_list); 446 break; 447 } 448 case NETDEV_UP: 449 /* Put all VLANs for this dev in the up state too. */ 450 vlan_group_for_each_dev(grp, i, vlandev) { 451 flgs = dev_get_flags(vlandev); 452 if (flgs & IFF_UP) 453 continue; 454 455 vlan = vlan_dev_priv(vlandev); 456 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 457 dev_change_flags(vlandev, flgs | IFF_UP); 458 netif_stacked_transfer_operstate(dev, vlandev); 459 } 460 break; 461 462 case NETDEV_UNREGISTER: 463 /* twiddle thumbs on netns device moves */ 464 if (dev->reg_state != NETREG_UNREGISTERING) 465 break; 466 467 vlan_group_for_each_dev(grp, i, vlandev) { 468 /* removal of last vid destroys vlan_info, abort 469 * afterwards */ 470 if (vlan_info->nr_vids == 1) 471 last = true; 472 473 unregister_vlan_dev(vlandev, &list); 474 if (last) 475 break; 476 } 477 unregister_netdevice_many(&list); 478 break; 479 480 case NETDEV_PRE_TYPE_CHANGE: 481 /* Forbid underlaying device to change its type. */ 482 if (vlan_uses_dev(dev)) 483 return NOTIFY_BAD; 484 break; 485 486 case NETDEV_NOTIFY_PEERS: 487 case NETDEV_BONDING_FAILOVER: 488 case NETDEV_RESEND_IGMP: 489 /* Propagate to vlan devices */ 490 vlan_group_for_each_dev(grp, i, vlandev) 491 call_netdevice_notifiers(event, vlandev); 492 break; 493 } 494 495 out: 496 return NOTIFY_DONE; 497 } 498 499 static struct notifier_block vlan_notifier_block __read_mostly = { 500 .notifier_call = vlan_device_event, 501 }; 502 503 /* 504 * VLAN IOCTL handler. 505 * o execute requested action or pass command to the device driver 506 * arg is really a struct vlan_ioctl_args __user *. 507 */ 508 static int vlan_ioctl_handler(struct net *net, void __user *arg) 509 { 510 int err; 511 struct vlan_ioctl_args args; 512 struct net_device *dev = NULL; 513 514 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 515 return -EFAULT; 516 517 /* Null terminate this sucker, just in case. */ 518 args.device1[23] = 0; 519 args.u.device2[23] = 0; 520 521 rtnl_lock(); 522 523 switch (args.cmd) { 524 case SET_VLAN_INGRESS_PRIORITY_CMD: 525 case SET_VLAN_EGRESS_PRIORITY_CMD: 526 case SET_VLAN_FLAG_CMD: 527 case ADD_VLAN_CMD: 528 case DEL_VLAN_CMD: 529 case GET_VLAN_REALDEV_NAME_CMD: 530 case GET_VLAN_VID_CMD: 531 err = -ENODEV; 532 dev = __dev_get_by_name(net, args.device1); 533 if (!dev) 534 goto out; 535 536 err = -EINVAL; 537 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 538 goto out; 539 } 540 541 switch (args.cmd) { 542 case SET_VLAN_INGRESS_PRIORITY_CMD: 543 err = -EPERM; 544 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 545 break; 546 vlan_dev_set_ingress_priority(dev, 547 args.u.skb_priority, 548 args.vlan_qos); 549 err = 0; 550 break; 551 552 case SET_VLAN_EGRESS_PRIORITY_CMD: 553 err = -EPERM; 554 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 555 break; 556 err = vlan_dev_set_egress_priority(dev, 557 args.u.skb_priority, 558 args.vlan_qos); 559 break; 560 561 case SET_VLAN_FLAG_CMD: 562 err = -EPERM; 563 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 564 break; 565 err = vlan_dev_change_flags(dev, 566 args.vlan_qos ? args.u.flag : 0, 567 args.u.flag); 568 break; 569 570 case SET_VLAN_NAME_TYPE_CMD: 571 err = -EPERM; 572 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 573 break; 574 if ((args.u.name_type >= 0) && 575 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { 576 struct vlan_net *vn; 577 578 vn = net_generic(net, vlan_net_id); 579 vn->name_type = args.u.name_type; 580 err = 0; 581 } else { 582 err = -EINVAL; 583 } 584 break; 585 586 case ADD_VLAN_CMD: 587 err = -EPERM; 588 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 589 break; 590 err = register_vlan_device(dev, args.u.VID); 591 break; 592 593 case DEL_VLAN_CMD: 594 err = -EPERM; 595 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 596 break; 597 unregister_vlan_dev(dev, NULL); 598 err = 0; 599 break; 600 601 case GET_VLAN_REALDEV_NAME_CMD: 602 err = 0; 603 vlan_dev_get_realdev_name(dev, args.u.device2); 604 if (copy_to_user(arg, &args, 605 sizeof(struct vlan_ioctl_args))) 606 err = -EFAULT; 607 break; 608 609 case GET_VLAN_VID_CMD: 610 err = 0; 611 args.u.VID = vlan_dev_vlan_id(dev); 612 if (copy_to_user(arg, &args, 613 sizeof(struct vlan_ioctl_args))) 614 err = -EFAULT; 615 break; 616 617 default: 618 err = -EOPNOTSUPP; 619 break; 620 } 621 out: 622 rtnl_unlock(); 623 return err; 624 } 625 626 static struct sk_buff **vlan_gro_receive(struct sk_buff **head, 627 struct sk_buff *skb) 628 { 629 struct sk_buff *p, **pp = NULL; 630 struct vlan_hdr *vhdr; 631 unsigned int hlen, off_vlan; 632 const struct packet_offload *ptype; 633 __be16 type; 634 int flush = 1; 635 636 off_vlan = skb_gro_offset(skb); 637 hlen = off_vlan + sizeof(*vhdr); 638 vhdr = skb_gro_header_fast(skb, off_vlan); 639 if (skb_gro_header_hard(skb, hlen)) { 640 vhdr = skb_gro_header_slow(skb, hlen, off_vlan); 641 if (unlikely(!vhdr)) 642 goto out; 643 } 644 645 type = vhdr->h_vlan_encapsulated_proto; 646 647 rcu_read_lock(); 648 ptype = gro_find_receive_by_type(type); 649 if (!ptype) 650 goto out_unlock; 651 652 flush = 0; 653 654 for (p = *head; p; p = p->next) { 655 struct vlan_hdr *vhdr2; 656 657 if (!NAPI_GRO_CB(p)->same_flow) 658 continue; 659 660 vhdr2 = (struct vlan_hdr *)(p->data + off_vlan); 661 if (compare_vlan_header(vhdr, vhdr2)) 662 NAPI_GRO_CB(p)->same_flow = 0; 663 } 664 665 skb_gro_pull(skb, sizeof(*vhdr)); 666 skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr)); 667 pp = ptype->callbacks.gro_receive(head, skb); 668 669 out_unlock: 670 rcu_read_unlock(); 671 out: 672 NAPI_GRO_CB(skb)->flush |= flush; 673 674 return pp; 675 } 676 677 static int vlan_gro_complete(struct sk_buff *skb, int nhoff) 678 { 679 struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff); 680 __be16 type = vhdr->h_vlan_encapsulated_proto; 681 struct packet_offload *ptype; 682 int err = -ENOENT; 683 684 rcu_read_lock(); 685 ptype = gro_find_complete_by_type(type); 686 if (ptype) 687 err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr)); 688 689 rcu_read_unlock(); 690 return err; 691 } 692 693 static struct packet_offload vlan_packet_offloads[] __read_mostly = { 694 { 695 .type = cpu_to_be16(ETH_P_8021Q), 696 .priority = 10, 697 .callbacks = { 698 .gro_receive = vlan_gro_receive, 699 .gro_complete = vlan_gro_complete, 700 }, 701 }, 702 { 703 .type = cpu_to_be16(ETH_P_8021AD), 704 .priority = 10, 705 .callbacks = { 706 .gro_receive = vlan_gro_receive, 707 .gro_complete = vlan_gro_complete, 708 }, 709 }, 710 }; 711 712 static int __net_init vlan_init_net(struct net *net) 713 { 714 struct vlan_net *vn = net_generic(net, vlan_net_id); 715 int err; 716 717 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 718 719 err = vlan_proc_init(net); 720 721 return err; 722 } 723 724 static void __net_exit vlan_exit_net(struct net *net) 725 { 726 vlan_proc_cleanup(net); 727 } 728 729 static struct pernet_operations vlan_net_ops = { 730 .init = vlan_init_net, 731 .exit = vlan_exit_net, 732 .id = &vlan_net_id, 733 .size = sizeof(struct vlan_net), 734 }; 735 736 static int __init vlan_proto_init(void) 737 { 738 int err; 739 unsigned int i; 740 741 pr_info("%s v%s\n", vlan_fullname, vlan_version); 742 743 err = register_pernet_subsys(&vlan_net_ops); 744 if (err < 0) 745 goto err0; 746 747 err = register_netdevice_notifier(&vlan_notifier_block); 748 if (err < 0) 749 goto err2; 750 751 err = vlan_gvrp_init(); 752 if (err < 0) 753 goto err3; 754 755 err = vlan_mvrp_init(); 756 if (err < 0) 757 goto err4; 758 759 err = vlan_netlink_init(); 760 if (err < 0) 761 goto err5; 762 763 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) 764 dev_add_offload(&vlan_packet_offloads[i]); 765 766 vlan_ioctl_set(vlan_ioctl_handler); 767 return 0; 768 769 err5: 770 vlan_mvrp_uninit(); 771 err4: 772 vlan_gvrp_uninit(); 773 err3: 774 unregister_netdevice_notifier(&vlan_notifier_block); 775 err2: 776 unregister_pernet_subsys(&vlan_net_ops); 777 err0: 778 return err; 779 } 780 781 static void __exit vlan_cleanup_module(void) 782 { 783 unsigned int i; 784 785 vlan_ioctl_set(NULL); 786 787 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++) 788 dev_remove_offload(&vlan_packet_offloads[i]); 789 790 vlan_netlink_fini(); 791 792 unregister_netdevice_notifier(&vlan_notifier_block); 793 794 unregister_pernet_subsys(&vlan_net_ops); 795 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 796 797 vlan_mvrp_uninit(); 798 vlan_gvrp_uninit(); 799 } 800 801 module_init(vlan_proto_init); 802 module_exit(vlan_cleanup_module); 803 804 MODULE_LICENSE("GPL"); 805 MODULE_VERSION(DRV_VERSION); 806