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 #include <linux/capability.h> 22 #include <linux/module.h> 23 #include <linux/netdevice.h> 24 #include <linux/skbuff.h> 25 #include <linux/slab.h> 26 #include <linux/init.h> 27 #include <linux/rculist.h> 28 #include <net/p8022.h> 29 #include <net/arp.h> 30 #include <linux/rtnetlink.h> 31 #include <linux/notifier.h> 32 #include <net/rtnetlink.h> 33 #include <net/net_namespace.h> 34 #include <net/netns/generic.h> 35 #include <asm/uaccess.h> 36 37 #include <linux/if_vlan.h> 38 #include "vlan.h" 39 #include "vlanproc.h" 40 41 #define DRV_VERSION "1.8" 42 43 /* Global VLAN variables */ 44 45 int vlan_net_id __read_mostly; 46 47 const char vlan_fullname[] = "802.1Q VLAN Support"; 48 const char vlan_version[] = DRV_VERSION; 49 static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; 50 static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; 51 52 static struct packet_type vlan_packet_type __read_mostly = { 53 .type = cpu_to_be16(ETH_P_8021Q), 54 .func = vlan_skb_recv, /* VLAN receive method */ 55 }; 56 57 /* End of global variables definitions. */ 58 59 static void vlan_group_free(struct vlan_group *grp) 60 { 61 int i; 62 63 for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) 64 kfree(grp->vlan_devices_arrays[i]); 65 kfree(grp); 66 } 67 68 static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) 69 { 70 struct vlan_group *grp; 71 72 grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); 73 if (!grp) 74 return NULL; 75 76 grp->real_dev = real_dev; 77 return grp; 78 } 79 80 static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id) 81 { 82 struct net_device **array; 83 unsigned int size; 84 85 ASSERT_RTNL(); 86 87 array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; 88 if (array != NULL) 89 return 0; 90 91 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; 92 array = kzalloc(size, GFP_KERNEL); 93 if (array == NULL) 94 return -ENOBUFS; 95 96 vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array; 97 return 0; 98 } 99 100 static void vlan_rcu_free(struct rcu_head *rcu) 101 { 102 vlan_group_free(container_of(rcu, struct vlan_group, rcu)); 103 } 104 105 void unregister_vlan_dev(struct net_device *dev, struct list_head *head) 106 { 107 struct vlan_dev_info *vlan = vlan_dev_info(dev); 108 struct net_device *real_dev = vlan->real_dev; 109 const struct net_device_ops *ops = real_dev->netdev_ops; 110 struct vlan_group *grp; 111 u16 vlan_id = vlan->vlan_id; 112 113 ASSERT_RTNL(); 114 115 grp = rtnl_dereference(real_dev->vlgrp); 116 BUG_ON(!grp); 117 118 /* Take it out of our own structures, but be sure to interlock with 119 * HW accelerating devices or SW vlan input packet processing if 120 * VLAN is not 0 (leave it there for 802.1p). 121 */ 122 if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) 123 ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); 124 125 grp->nr_vlans--; 126 127 vlan_group_set_device(grp, vlan_id, NULL); 128 if (!grp->killall) 129 synchronize_net(); 130 131 unregister_netdevice_queue(dev, head); 132 133 /* If the group is now empty, kill off the group. */ 134 if (grp->nr_vlans == 0) { 135 vlan_gvrp_uninit_applicant(real_dev); 136 137 rcu_assign_pointer(real_dev->vlgrp, NULL); 138 if (ops->ndo_vlan_rx_register) 139 ops->ndo_vlan_rx_register(real_dev, NULL); 140 141 /* Free the group, after all cpu's are done. */ 142 call_rcu(&grp->rcu, vlan_rcu_free); 143 } 144 145 /* Get rid of the vlan's reference to real_dev */ 146 dev_put(real_dev); 147 } 148 149 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) 150 { 151 const char *name = real_dev->name; 152 const struct net_device_ops *ops = real_dev->netdev_ops; 153 154 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 155 pr_info("8021q: VLANs not supported on %s\n", name); 156 return -EOPNOTSUPP; 157 } 158 159 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && 160 (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { 161 pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); 162 return -EOPNOTSUPP; 163 } 164 165 if (vlan_find_dev(real_dev, vlan_id) != NULL) 166 return -EEXIST; 167 168 return 0; 169 } 170 171 int register_vlan_dev(struct net_device *dev) 172 { 173 struct vlan_dev_info *vlan = vlan_dev_info(dev); 174 struct net_device *real_dev = vlan->real_dev; 175 const struct net_device_ops *ops = real_dev->netdev_ops; 176 u16 vlan_id = vlan->vlan_id; 177 struct vlan_group *grp, *ngrp = NULL; 178 int err; 179 180 grp = rtnl_dereference(real_dev->vlgrp); 181 if (!grp) { 182 ngrp = grp = vlan_group_alloc(real_dev); 183 if (!grp) 184 return -ENOBUFS; 185 err = vlan_gvrp_init_applicant(real_dev); 186 if (err < 0) 187 goto out_free_group; 188 } 189 190 err = vlan_group_prealloc_vid(grp, vlan_id); 191 if (err < 0) 192 goto out_uninit_applicant; 193 194 err = register_netdevice(dev); 195 if (err < 0) 196 goto out_uninit_applicant; 197 198 /* Account for reference in struct vlan_dev_info */ 199 dev_hold(real_dev); 200 201 netif_stacked_transfer_operstate(real_dev, dev); 202 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ 203 204 /* So, got the sucker initialized, now lets place 205 * it into our local structure. 206 */ 207 vlan_group_set_device(grp, vlan_id, dev); 208 grp->nr_vlans++; 209 210 if (ngrp) { 211 if (ops->ndo_vlan_rx_register) 212 ops->ndo_vlan_rx_register(real_dev, ngrp); 213 rcu_assign_pointer(real_dev->vlgrp, ngrp); 214 } 215 if (real_dev->features & NETIF_F_HW_VLAN_FILTER) 216 ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); 217 218 return 0; 219 220 out_uninit_applicant: 221 if (ngrp) 222 vlan_gvrp_uninit_applicant(real_dev); 223 out_free_group: 224 if (ngrp) { 225 /* Free the group, after all cpu's are done. */ 226 call_rcu(&ngrp->rcu, vlan_rcu_free); 227 } 228 return err; 229 } 230 231 /* Attach a VLAN device to a mac address (ie Ethernet Card). 232 * Returns 0 if the device was created or a negative error code otherwise. 233 */ 234 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) 235 { 236 struct net_device *new_dev; 237 struct net *net = dev_net(real_dev); 238 struct vlan_net *vn = net_generic(net, vlan_net_id); 239 char name[IFNAMSIZ]; 240 int err; 241 242 if (vlan_id >= VLAN_VID_MASK) 243 return -ERANGE; 244 245 err = vlan_check_real_dev(real_dev, vlan_id); 246 if (err < 0) 247 return err; 248 249 /* Gotta set up the fields for the device. */ 250 switch (vn->name_type) { 251 case VLAN_NAME_TYPE_RAW_PLUS_VID: 252 /* name will look like: eth1.0005 */ 253 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); 254 break; 255 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 256 /* Put our vlan.VID in the name. 257 * Name will look like: vlan5 258 */ 259 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); 260 break; 261 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 262 /* Put our vlan.VID in the name. 263 * Name will look like: eth0.5 264 */ 265 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); 266 break; 267 case VLAN_NAME_TYPE_PLUS_VID: 268 /* Put our vlan.VID in the name. 269 * Name will look like: vlan0005 270 */ 271 default: 272 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); 273 } 274 275 new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, vlan_setup); 276 277 if (new_dev == NULL) 278 return -ENOBUFS; 279 280 dev_net_set(new_dev, net); 281 /* need 4 bytes for extra VLAN header info, 282 * hope the underlying device can handle it. 283 */ 284 new_dev->mtu = real_dev->mtu; 285 286 vlan_dev_info(new_dev)->vlan_id = vlan_id; 287 vlan_dev_info(new_dev)->real_dev = real_dev; 288 vlan_dev_info(new_dev)->dent = NULL; 289 vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR; 290 291 new_dev->rtnl_link_ops = &vlan_link_ops; 292 err = register_vlan_dev(new_dev); 293 if (err < 0) 294 goto out_free_newdev; 295 296 return 0; 297 298 out_free_newdev: 299 free_netdev(new_dev); 300 return err; 301 } 302 303 static void vlan_sync_address(struct net_device *dev, 304 struct net_device *vlandev) 305 { 306 struct vlan_dev_info *vlan = vlan_dev_info(vlandev); 307 308 /* May be called without an actual change */ 309 if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr)) 310 return; 311 312 /* vlan address was different from the old address and is equal to 313 * the new address */ 314 if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && 315 !compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) 316 dev_uc_del(dev, vlandev->dev_addr); 317 318 /* vlan address was equal to the old address and is different from 319 * the new address */ 320 if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) && 321 compare_ether_addr(vlandev->dev_addr, dev->dev_addr)) 322 dev_uc_add(dev, vlandev->dev_addr); 323 324 memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN); 325 } 326 327 static void vlan_transfer_features(struct net_device *dev, 328 struct net_device *vlandev) 329 { 330 unsigned long old_features = vlandev->features; 331 332 vlandev->features &= ~dev->vlan_features; 333 vlandev->features |= dev->features & dev->vlan_features; 334 vlandev->gso_max_size = dev->gso_max_size; 335 336 if (dev->features & NETIF_F_HW_VLAN_TX) 337 vlandev->hard_header_len = dev->hard_header_len; 338 else 339 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 340 341 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 342 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 343 #endif 344 if (old_features != vlandev->features) 345 netdev_features_change(vlandev); 346 } 347 348 static void __vlan_device_event(struct net_device *dev, unsigned long event) 349 { 350 switch (event) { 351 case NETDEV_CHANGENAME: 352 vlan_proc_rem_dev(dev); 353 if (vlan_proc_add_dev(dev) < 0) 354 pr_warning("8021q: failed to change proc name for %s\n", 355 dev->name); 356 break; 357 case NETDEV_REGISTER: 358 if (vlan_proc_add_dev(dev) < 0) 359 pr_warning("8021q: failed to add proc entry for %s\n", 360 dev->name); 361 break; 362 case NETDEV_UNREGISTER: 363 vlan_proc_rem_dev(dev); 364 break; 365 } 366 } 367 368 static int vlan_device_event(struct notifier_block *unused, unsigned long event, 369 void *ptr) 370 { 371 struct net_device *dev = ptr; 372 struct vlan_group *grp; 373 int i, flgs; 374 struct net_device *vlandev; 375 struct vlan_dev_info *vlan; 376 LIST_HEAD(list); 377 378 if (is_vlan_dev(dev)) 379 __vlan_device_event(dev, event); 380 381 if ((event == NETDEV_UP) && 382 (dev->features & NETIF_F_HW_VLAN_FILTER) && 383 dev->netdev_ops->ndo_vlan_rx_add_vid) { 384 pr_info("8021q: adding VLAN 0 to HW filter on device %s\n", 385 dev->name); 386 dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); 387 } 388 389 grp = rtnl_dereference(dev->vlgrp); 390 if (!grp) 391 goto out; 392 393 /* It is OK that we do not hold the group lock right now, 394 * as we run under the RTNL lock. 395 */ 396 397 switch (event) { 398 case NETDEV_CHANGE: 399 /* Propagate real device state to vlan devices */ 400 for (i = 0; i < VLAN_N_VID; i++) { 401 vlandev = vlan_group_get_device(grp, i); 402 if (!vlandev) 403 continue; 404 405 netif_stacked_transfer_operstate(dev, vlandev); 406 } 407 break; 408 409 case NETDEV_CHANGEADDR: 410 /* Adjust unicast filters on underlying device */ 411 for (i = 0; i < VLAN_N_VID; i++) { 412 vlandev = vlan_group_get_device(grp, i); 413 if (!vlandev) 414 continue; 415 416 flgs = vlandev->flags; 417 if (!(flgs & IFF_UP)) 418 continue; 419 420 vlan_sync_address(dev, vlandev); 421 } 422 break; 423 424 case NETDEV_CHANGEMTU: 425 for (i = 0; i < VLAN_N_VID; i++) { 426 vlandev = vlan_group_get_device(grp, i); 427 if (!vlandev) 428 continue; 429 430 if (vlandev->mtu <= dev->mtu) 431 continue; 432 433 dev_set_mtu(vlandev, dev->mtu); 434 } 435 break; 436 437 case NETDEV_FEAT_CHANGE: 438 /* Propagate device features to underlying device */ 439 for (i = 0; i < VLAN_N_VID; i++) { 440 vlandev = vlan_group_get_device(grp, i); 441 if (!vlandev) 442 continue; 443 444 vlan_transfer_features(dev, vlandev); 445 } 446 447 break; 448 449 case NETDEV_DOWN: 450 /* Put all VLANs for this dev in the down state too. */ 451 for (i = 0; i < VLAN_N_VID; i++) { 452 vlandev = vlan_group_get_device(grp, i); 453 if (!vlandev) 454 continue; 455 456 flgs = vlandev->flags; 457 if (!(flgs & IFF_UP)) 458 continue; 459 460 vlan = vlan_dev_info(vlandev); 461 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 462 dev_change_flags(vlandev, flgs & ~IFF_UP); 463 netif_stacked_transfer_operstate(dev, vlandev); 464 } 465 break; 466 467 case NETDEV_UP: 468 /* Put all VLANs for this dev in the up state too. */ 469 for (i = 0; i < VLAN_N_VID; i++) { 470 vlandev = vlan_group_get_device(grp, i); 471 if (!vlandev) 472 continue; 473 474 flgs = vlandev->flags; 475 if (flgs & IFF_UP) 476 continue; 477 478 vlan = vlan_dev_info(vlandev); 479 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 480 dev_change_flags(vlandev, flgs | IFF_UP); 481 netif_stacked_transfer_operstate(dev, vlandev); 482 } 483 break; 484 485 case NETDEV_UNREGISTER: 486 /* twiddle thumbs on netns device moves */ 487 if (dev->reg_state != NETREG_UNREGISTERING) 488 break; 489 490 /* Delete all VLANs for this dev. */ 491 grp->killall = 1; 492 493 for (i = 0; i < VLAN_N_VID; i++) { 494 vlandev = vlan_group_get_device(grp, i); 495 if (!vlandev) 496 continue; 497 498 /* unregistration of last vlan destroys group, abort 499 * afterwards */ 500 if (grp->nr_vlans == 1) 501 i = VLAN_N_VID; 502 503 unregister_vlan_dev(vlandev, &list); 504 } 505 unregister_netdevice_many(&list); 506 break; 507 508 case NETDEV_PRE_TYPE_CHANGE: 509 /* Forbid underlaying device to change its type. */ 510 return NOTIFY_BAD; 511 } 512 513 out: 514 return NOTIFY_DONE; 515 } 516 517 static struct notifier_block vlan_notifier_block __read_mostly = { 518 .notifier_call = vlan_device_event, 519 }; 520 521 /* 522 * VLAN IOCTL handler. 523 * o execute requested action or pass command to the device driver 524 * arg is really a struct vlan_ioctl_args __user *. 525 */ 526 static int vlan_ioctl_handler(struct net *net, void __user *arg) 527 { 528 int err; 529 struct vlan_ioctl_args args; 530 struct net_device *dev = NULL; 531 532 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 533 return -EFAULT; 534 535 /* Null terminate this sucker, just in case. */ 536 args.device1[23] = 0; 537 args.u.device2[23] = 0; 538 539 rtnl_lock(); 540 541 switch (args.cmd) { 542 case SET_VLAN_INGRESS_PRIORITY_CMD: 543 case SET_VLAN_EGRESS_PRIORITY_CMD: 544 case SET_VLAN_FLAG_CMD: 545 case ADD_VLAN_CMD: 546 case DEL_VLAN_CMD: 547 case GET_VLAN_REALDEV_NAME_CMD: 548 case GET_VLAN_VID_CMD: 549 err = -ENODEV; 550 dev = __dev_get_by_name(net, args.device1); 551 if (!dev) 552 goto out; 553 554 err = -EINVAL; 555 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 556 goto out; 557 } 558 559 switch (args.cmd) { 560 case SET_VLAN_INGRESS_PRIORITY_CMD: 561 err = -EPERM; 562 if (!capable(CAP_NET_ADMIN)) 563 break; 564 vlan_dev_set_ingress_priority(dev, 565 args.u.skb_priority, 566 args.vlan_qos); 567 err = 0; 568 break; 569 570 case SET_VLAN_EGRESS_PRIORITY_CMD: 571 err = -EPERM; 572 if (!capable(CAP_NET_ADMIN)) 573 break; 574 err = vlan_dev_set_egress_priority(dev, 575 args.u.skb_priority, 576 args.vlan_qos); 577 break; 578 579 case SET_VLAN_FLAG_CMD: 580 err = -EPERM; 581 if (!capable(CAP_NET_ADMIN)) 582 break; 583 err = vlan_dev_change_flags(dev, 584 args.vlan_qos ? args.u.flag : 0, 585 args.u.flag); 586 break; 587 588 case SET_VLAN_NAME_TYPE_CMD: 589 err = -EPERM; 590 if (!capable(CAP_NET_ADMIN)) 591 break; 592 if ((args.u.name_type >= 0) && 593 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { 594 struct vlan_net *vn; 595 596 vn = net_generic(net, vlan_net_id); 597 vn->name_type = args.u.name_type; 598 err = 0; 599 } else { 600 err = -EINVAL; 601 } 602 break; 603 604 case ADD_VLAN_CMD: 605 err = -EPERM; 606 if (!capable(CAP_NET_ADMIN)) 607 break; 608 err = register_vlan_device(dev, args.u.VID); 609 break; 610 611 case DEL_VLAN_CMD: 612 err = -EPERM; 613 if (!capable(CAP_NET_ADMIN)) 614 break; 615 unregister_vlan_dev(dev, NULL); 616 err = 0; 617 break; 618 619 case GET_VLAN_REALDEV_NAME_CMD: 620 err = 0; 621 vlan_dev_get_realdev_name(dev, args.u.device2); 622 if (copy_to_user(arg, &args, 623 sizeof(struct vlan_ioctl_args))) 624 err = -EFAULT; 625 break; 626 627 case GET_VLAN_VID_CMD: 628 err = 0; 629 args.u.VID = vlan_dev_vlan_id(dev); 630 if (copy_to_user(arg, &args, 631 sizeof(struct vlan_ioctl_args))) 632 err = -EFAULT; 633 break; 634 635 default: 636 err = -EOPNOTSUPP; 637 break; 638 } 639 out: 640 rtnl_unlock(); 641 return err; 642 } 643 644 static int __net_init vlan_init_net(struct net *net) 645 { 646 struct vlan_net *vn = net_generic(net, vlan_net_id); 647 int err; 648 649 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 650 651 err = vlan_proc_init(net); 652 653 return err; 654 } 655 656 static void __net_exit vlan_exit_net(struct net *net) 657 { 658 vlan_proc_cleanup(net); 659 } 660 661 static struct pernet_operations vlan_net_ops = { 662 .init = vlan_init_net, 663 .exit = vlan_exit_net, 664 .id = &vlan_net_id, 665 .size = sizeof(struct vlan_net), 666 }; 667 668 static int __init vlan_proto_init(void) 669 { 670 int err; 671 672 pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright); 673 pr_info("All bugs added by %s\n", vlan_buggyright); 674 675 err = register_pernet_subsys(&vlan_net_ops); 676 if (err < 0) 677 goto err0; 678 679 err = register_netdevice_notifier(&vlan_notifier_block); 680 if (err < 0) 681 goto err2; 682 683 err = vlan_gvrp_init(); 684 if (err < 0) 685 goto err3; 686 687 err = vlan_netlink_init(); 688 if (err < 0) 689 goto err4; 690 691 dev_add_pack(&vlan_packet_type); 692 vlan_ioctl_set(vlan_ioctl_handler); 693 return 0; 694 695 err4: 696 vlan_gvrp_uninit(); 697 err3: 698 unregister_netdevice_notifier(&vlan_notifier_block); 699 err2: 700 unregister_pernet_subsys(&vlan_net_ops); 701 err0: 702 return err; 703 } 704 705 static void __exit vlan_cleanup_module(void) 706 { 707 vlan_ioctl_set(NULL); 708 vlan_netlink_fini(); 709 710 unregister_netdevice_notifier(&vlan_notifier_block); 711 712 dev_remove_pack(&vlan_packet_type); 713 714 unregister_pernet_subsys(&vlan_net_ops); 715 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 716 717 vlan_gvrp_uninit(); 718 } 719 720 module_init(vlan_proto_init); 721 module_exit(vlan_cleanup_module); 722 723 MODULE_LICENSE("GPL"); 724 MODULE_VERSION(DRV_VERSION); 725