lustre/obdclass/class_obd.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Object Devices Class Driver
   5  *
   6  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * These are the only exported functions, they provide some generic
  24  * infrastructure for managing object devices
  25  */
  26
  27 #define DEBUG_SUBSYSTEM S_CLASS
  28 #ifndef EXPORT_SYMTAB
  29 # define EXPORT_SYMTAB
  30 #endif
  31 #ifdef __KERNEL__
  32 #include <linux/config.h> /* for CONFIG_PROC_FS */
  33 #include <linux/module.h>
  34 #include <linux/errno.h>
  35 #include <linux/kernel.h>
  36 #include <linux/major.h>
  37 #include <linux/sched.h>
  38 #include <linux/lp.h>
  39 #include <linux/slab.h>
  40 #include <linux/ioport.h>
  41 #include <linux/fcntl.h>
  42 #include <linux/delay.h>
  43 #include <linux/skbuff.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/fs.h>
  46 #include <linux/poll.h>
  47 #include <linux/init.h>
  48 #include <linux/list.h>
  49 #include <linux/highmem.h>
  50 #include <asm/io.h>
  51 #include <asm/ioctls.h>
  52 #include <asm/system.h>
  53 #include <asm/poll.h>
  54 #include <asm/uaccess.h>
  55 #include <linux/miscdevice.h>
  56 #include <linux/smp_lock.h>
  57 #include <linux/seq_file.h>
  58 #else
  59 # include <liblustre.h>
  60 #endif
  61
  62 #include <linux/obd_support.h>
  63 #include <linux/obd_class.h>
  64 #include <linux/lustre_debug.h>
  65 #include <linux/lprocfs_status.h>
  66 #ifdef __KERNEL__
  67 #include <linux/lustre_build_version.h>
  68 #include <linux/lustre_version.h>
  69 #endif
  70 #include <libcfs/list.h>
  71
  72 #ifndef __KERNEL__
  73 /* liblustre workaround */
  74 atomic_t portal_kmemory = {0};
  75 #endif
  76
  77 struct obd_device obd_dev[MAX_OBD_DEVICES];
  78 struct list_head obd_types;
  79 spinlock_t obd_dev_lock;
  80 #ifndef __KERNEL__
  81 atomic_t obd_memory;
  82 int obd_memmax;
  83 #endif
  84
  85 int proc_version;
  86
  87 /* The following are visible and mutable through /proc/sys/lustre/. */
  88 unsigned int obd_fail_loc;
  89 unsigned int obd_dump_on_timeout;
  90 unsigned int obd_timeout = 100;
  91 unsigned int ldlm_timeout = 6;
  92 char obd_lustre_upcall[128] = "DEFAULT"; /* or NONE or /full/path/to/upcall  */
  93 unsigned int obd_sync_filter = 1; /* = 1, sync by default */
  94
  95 DECLARE_WAIT_QUEUE_HEAD(obd_race_waitq);
  96
  97 #ifdef __KERNEL__
  98
  99 unsigned int obd_print_fail_loc(void)
 100 {
 101         CWARN("obd_fail_loc = %x\n", obd_fail_loc);
 102         return obd_fail_loc;
 103 }
 104
 105 /*  opening /dev/obd */
 106 static int obd_class_open(struct inode * inode, struct file * file)
 107 {
 108         ENTRY;
 109
 110         PORTAL_MODULE_USE;
 111         RETURN(0);
 112 }
 113
 114 /*  closing /dev/obd */
 115 static int obd_class_release(struct inode * inode, struct file * file)
 116 {
 117         ENTRY;
 118
 119         PORTAL_MODULE_UNUSE;
 120         RETURN(0);
 121 }
 122 #endif
 123
 124 static inline void obd_data2conn(struct lustre_handle *conn,
 125                                  struct obd_ioctl_data *data)
 126 {
 127         memset(conn, 0, sizeof *conn);
 128         conn->cookie = data->ioc_cookie;
 129 }
 130
 131 static inline void obd_conn2data(struct obd_ioctl_data *data,
 132                                  struct lustre_handle *conn)
 133 {
 134         data->ioc_cookie = conn->cookie;
 135 }
 136
 137 int class_resolve_dev_name(uint32_t len, char *name)
 138 {
 139         int rc;
 140         int dev;
 141
 142         if (!len || !name) {
 143                 CERROR("No name passed,!\n");
 144                 GOTO(out, rc = -EINVAL);
 145         }
 146         if (name[len - 1] != 0) {
 147                 CERROR("Name not nul terminated!\n");
 148                 GOTO(out, rc = -EINVAL);
 149         }
 150
 151         CDEBUG(D_IOCTL, "device name %s\n", name);
 152         dev = class_name2dev(name);
 153         if (dev == -1) {
 154                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 155                 GOTO(out, rc = -EINVAL);
 156         }
 157
 158         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 159         rc = dev;
 160
 161 out:
 162         RETURN(rc);
 163 }
 164
 165 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 166 {
 167         char *buf = NULL;
 168         struct obd_ioctl_data *data;
 169         struct portals_debug_ioctl_data *debug_data;
 170         struct obd_device *obd = NULL;
 171         int err = 0, len = 0;
 172         ENTRY;
 173
 174         if (current->fsuid != 0)
 175                 RETURN(err = -EACCES);
 176
 177         if ((cmd & 0xffffff00) == ((int)'T') << 8) /* ignore all tty ioctls */
 178                 RETURN(err = -ENOTTY);
 179
 180         /* only for debugging */
 181         if (cmd == PTL_IOC_DEBUG_MASK) {
 182                 debug_data = (struct portals_debug_ioctl_data*)arg;
 183                 portal_subsystem_debug = debug_data->subs;
 184                 portal_debug = debug_data->debug;
 185                 return 0;
 186         }
 187
 188         CDEBUG(D_IOCTL, "cmd = %x, obd = %p\n", cmd, obd);
 189         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 190                 CERROR("OBD ioctl: data error\n");
 191                 GOTO(out, err = -EINVAL);
 192         }
 193         data = (struct obd_ioctl_data *)buf;
 194
 195         switch (cmd) {
 196         case OBD_IOC_PROCESS_CFG: {
 197                 struct lustre_cfg *lcfg;
 198
 199                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 200                         CERROR("No config buffer passed!\n");
 201                         GOTO(out, err = -EINVAL);
 202                 }
 203
 204                 err = lustre_cfg_sanity_check(data->ioc_pbuf1,
 205                                               data->ioc_plen1);
 206                 if (err)
 207                         GOTO(out, err);
 208
 209                 OBD_ALLOC(lcfg, data->ioc_plen1);
 210                 err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1);
 211                 if (err)
 212                         GOTO(out, err);
 213
 214                 err = class_process_config(lcfg);
 215                 OBD_FREE(lcfg, data->ioc_plen1);
 216                 GOTO(out, err);
 217         }
 218
 219         case OBD_GET_VERSION:
 220                 if (!data->ioc_inlbuf1) {
 221                         CERROR("No buffer passed in ioctl\n");
 222                         GOTO(out, err = -EINVAL);
 223                 }
 224
 225                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 226                         CERROR("ioctl buffer too small to hold version\n");
 227                         GOTO(out, err = -EINVAL);
 228                 }
 229
 230                 memcpy(data->ioc_bulk, BUILD_VERSION,
 231                        strlen(BUILD_VERSION) + 1);
 232
 233                 err = copy_to_user((void *)arg, data, len);
 234                 if (err)
 235                         err = -EFAULT;
 236                 GOTO(out, err);
 237
 238         case OBD_IOC_NAME2DEV: {
 239                 /* Resolve a device name.  This does not change the
 240                  * currently selected device.
 241                  */
 242                 int dev;
 243
 244                 dev = class_resolve_dev_name(data->ioc_inllen1,
 245                                              data->ioc_inlbuf1);
 246                 data->ioc_dev = dev;
 247                 if (dev < 0)
 248                         GOTO(out, err = -EINVAL);
 249
 250                 err = copy_to_user((void *)arg, data, sizeof(*data));
 251                 if (err)
 252                         err = -EFAULT;
 253                 GOTO(out, err);
 254         }
 255
 256         case OBD_IOC_UUID2DEV: {
 257                 /* Resolve a device uuid.  This does not change the
 258                  * currently selected device.
 259                  */
 260                 int dev;
 261                 struct obd_uuid uuid;
 262
 263                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 264                         CERROR("No UUID passed!\n");
 265                         GOTO(out, err = -EINVAL);
 266                 }
 267                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 268                         CERROR("UUID not NUL terminated!\n");
 269                         GOTO(out, err = -EINVAL);
 270                 }
 271
 272                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 273                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 274                 dev = class_uuid2dev(&uuid);
 275                 data->ioc_dev = dev;
 276                 if (dev == -1) {
 277                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 278                                data->ioc_inlbuf1);
 279                         GOTO(out, err = -EINVAL);
 280                 }
 281
 282                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 283                        dev);
 284                 err = copy_to_user((void *)arg, data, sizeof(*data));
 285                 if (err)
 286                         err = -EFAULT;
 287                 GOTO(out, err);
 288         }
 289
 290
 291         case OBD_IOC_CLOSE_UUID: {
 292                 ptl_nid_t       peer_nid;
 293                 __u32           peer_nal;
 294                 CDEBUG(D_IOCTL, "closing all connections to uuid %s\n",
 295                        data->ioc_inlbuf1);
 296                 lustre_uuid_to_peer(data->ioc_inlbuf1, &peer_nal, &peer_nid);
 297                 GOTO(out, err = 0);
 298         }
 299
 300         }
 301
 302         if (data->ioc_dev >= MAX_OBD_DEVICES) {
 303                 CERROR("OBD ioctl: No device\n");
 304                 GOTO(out, err = -EINVAL);
 305         }
 306         obd = &obd_dev[data->ioc_dev];
 307         if (!(obd && obd->obd_set_up) || obd->obd_stopping) {
 308                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 309                 GOTO(out, err = -EINVAL);
 310         }
 311
 312         switch(cmd) {
 313         case OBD_IOC_NO_TRANSNO: {
 314                 if (!obd->obd_attached) {
 315                         CERROR("Device %d not attached\n", obd->obd_minor);
 316                         GOTO(out, err = -ENODEV);
 317                 }
 318                 CDEBUG(D_IOCTL,
 319                        "disabling committed-transno notifications on %d\n",
 320                        obd->obd_minor);
 321                 obd->obd_no_transno = 1;
 322                 GOTO(out, err = 0);
 323         }
 324
 325         default: {
 326                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 327                 if (err)
 328                         GOTO(out, err);
 329
 330                 err = copy_to_user((void *)arg, data, len);
 331                 if (err)
 332                         err = -EFAULT;
 333                 GOTO(out, err);
 334         }
 335         }
 336
 337  out:
 338         if (buf)
 339                 obd_ioctl_freedata(buf, len);
 340         RETURN(err);
 341 } /* class_handle_ioctl */
 342
 343
 344
 345 #define OBD_MINOR 241
 346 #ifdef __KERNEL__
 347 /* to control /dev/obd */
 348 static int obd_class_ioctl(struct inode *inode, struct file *filp,
 349                            unsigned int cmd, unsigned long arg)
 350 {
 351         return class_handle_ioctl(cmd, arg);
 352 }
 353
 354 /* declare character device */
 355 static struct file_operations obd_psdev_fops = {
 356         .owner   = THIS_MODULE,
 357         .ioctl   = obd_class_ioctl,     /* ioctl */
 358         .open    = obd_class_open,      /* open */
 359         .release = obd_class_release,   /* release */
 360 };
 361
 362 /* modules setup */
 363 static struct miscdevice obd_psdev = {
 364         .minor = OBD_MINOR,
 365         .name  = "obd_psdev",
 366         .fops  = &obd_psdev_fops,
 367 };
 368 #else
 369 void *obd_psdev = NULL;
 370 #endif
 371
 372 EXPORT_SYMBOL(obd_dev);
 373 EXPORT_SYMBOL(obdo_cachep);
 374 EXPORT_SYMBOL(obd_fail_loc);
 375 EXPORT_SYMBOL(obd_print_fail_loc);
 376 EXPORT_SYMBOL(obd_race_waitq);
 377 EXPORT_SYMBOL(obd_dump_on_timeout);
 378 EXPORT_SYMBOL(ldlm_timeout);
 379 EXPORT_SYMBOL(obd_timeout);
 380 EXPORT_SYMBOL(obd_lustre_upcall);
 381 EXPORT_SYMBOL(obd_sync_filter);
 382 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 383 EXPORT_SYMBOL(ptlrpc_abort_inflight_superhack);
 384 EXPORT_SYMBOL(proc_lustre_root);
 385
 386 EXPORT_SYMBOL(class_register_type);
 387 EXPORT_SYMBOL(class_unregister_type);
 388 EXPORT_SYMBOL(class_get_type);
 389 EXPORT_SYMBOL(class_put_type);
 390 EXPORT_SYMBOL(class_name2dev);
 391 EXPORT_SYMBOL(class_name2obd);
 392 EXPORT_SYMBOL(class_uuid2dev);
 393 EXPORT_SYMBOL(class_uuid2obd);
 394 EXPORT_SYMBOL(class_find_client_obd);
 395 EXPORT_SYMBOL(class_devices_in_group);
 396 EXPORT_SYMBOL(__class_export_put);
 397 EXPORT_SYMBOL(class_new_export);
 398 EXPORT_SYMBOL(class_unlink_export);
 399 EXPORT_SYMBOL(class_import_get);
 400 EXPORT_SYMBOL(class_import_put);
 401 EXPORT_SYMBOL(class_new_import);
 402 EXPORT_SYMBOL(class_destroy_import);
 403 EXPORT_SYMBOL(class_connect);
 404 EXPORT_SYMBOL(class_conn2export);
 405 EXPORT_SYMBOL(class_exp2obd);
 406 EXPORT_SYMBOL(class_conn2obd);
 407 EXPORT_SYMBOL(class_exp2cliimp);
 408 EXPORT_SYMBOL(class_conn2cliimp);
 409 EXPORT_SYMBOL(class_disconnect);
 410 EXPORT_SYMBOL(class_disconnect_exports);
 411 EXPORT_SYMBOL(class_disconnect_stale_exports);
 412
 413 EXPORT_SYMBOL(oig_init);
 414 EXPORT_SYMBOL(oig_release);
 415 EXPORT_SYMBOL(oig_add_one);
 416 EXPORT_SYMBOL(oig_wait);
 417 EXPORT_SYMBOL(oig_complete_one);
 418
 419 /* uuid.c */
 420 EXPORT_SYMBOL(class_uuid_unparse);
 421 EXPORT_SYMBOL(lustre_uuid_to_peer);
 422
 423 EXPORT_SYMBOL(class_handle_hash);
 424 EXPORT_SYMBOL(class_handle_unhash);
 425 EXPORT_SYMBOL(class_handle2object);
 426
 427 /* config.c */
 428 EXPORT_SYMBOL(class_get_profile);
 429 EXPORT_SYMBOL(class_del_profile);
 430 EXPORT_SYMBOL(class_process_config);
 431 EXPORT_SYMBOL(class_config_process_llog);
 432 EXPORT_SYMBOL(class_config_dump_llog);
 433
 434 /* mea.c */
 435 EXPORT_SYMBOL(mea_name2idx);
 436 EXPORT_SYMBOL(raw_name2idx);
 437
 438 #ifdef LPROCFS
 439 int obd_proc_read_version(char *page, char **start, off_t off, int count,
 440                           int *eof, void *data)
 441 {
 442         *eof = 1;
 443         return snprintf(page, count, "%s\n", BUILD_VERSION);
 444 }
 445
 446 int obd_proc_read_kernel_version(char *page, char **start, off_t off, int count,
 447                                  int *eof, void *data)
 448 {
 449         *eof = 1;
 450         return snprintf(page, count, "%u\n", LUSTRE_KERNEL_VERSION);
 451 }
 452
 453 int obd_proc_read_pinger(char *page, char **start, off_t off, int count,
 454                          int *eof, void *data)
 455 {
 456         *eof = 1;
 457         return snprintf(page, count, "%s\n",
 458 #ifdef ENABLE_PINGER
 459                         "on"
 460 #else
 461                         "off"
 462 #endif
 463                        );
 464 }
 465
 466 #if ENABLE_GSS
 467 /* FIXME move these staff to proper place */
 468 int (*lustre_secinit_downcall_handler)(const char *buffer,
 469                                        long count) = NULL;
 470 EXPORT_SYMBOL(lustre_secinit_downcall_handler);
 471
 472 int obd_proc_write_secinit(struct file *file, const char *buffer,
 473                            unsigned long count, void *data)
 474 {
 475         int rc = 0;
 476
 477         if (lustre_secinit_downcall_handler) {
 478                 rc = (*lustre_secinit_downcall_handler)((char *)buffer, count);
 479                 if (rc) {
 480                         LASSERT(rc < 0);
 481                         return rc;
 482                 }
 483         }
 484         return (int)count;
 485 }
 486 #endif
 487
 488 /* Root for /proc/fs/lustre */
 489 struct proc_dir_entry *proc_lustre_root = NULL;
 490 struct lprocfs_vars lprocfs_base[] = {
 491         { "version", obd_proc_read_version, NULL, NULL },
 492         { "kernel_version", obd_proc_read_kernel_version, NULL, NULL },
 493         { "pinger", obd_proc_read_pinger, NULL, NULL },
 494 #if ENABLE_GSS
 495         { "secinit", NULL, obd_proc_write_secinit, NULL },
 496 #endif
 497         { 0 }
 498 };
 499
 500 static void *obd_device_list_seq_start(struct seq_file *p, loff_t*pos)
 501 {
 502         if (*pos >= MAX_OBD_DEVICES)
 503                 return NULL;
 504         return &obd_dev[*pos];
 505 }
 506
 507 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 508 {
 509 }
 510
 511 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 512 {
 513         ++*pos;
 514         if (*pos >= MAX_OBD_DEVICES)
 515                 return NULL;
 516         return &obd_dev[*pos];
 517 }
 518
 519 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 520 {
 521         struct obd_device *obd = (struct obd_device *)v;
 522         int index = obd - &obd_dev[0];
 523         char *status;
 524
 525         if (!obd->obd_type)
 526                 return 0;
 527         if (obd->obd_stopping)
 528                 status = "ST";
 529         else if (obd->obd_set_up)
 530                 status = "UP";
 531         else if (obd->obd_attached)
 532                 status = "AT";
 533         else
 534                 status = "--";
 535
 536         return seq_printf(p, "%3d %s %s %s %s %d\n",
 537                           (int)index, status, obd->obd_type->typ_name,
 538                           obd->obd_name, obd->obd_uuid.uuid,
 539                           atomic_read(&obd->obd_refcount));
 540 }
 541
 542 struct seq_operations obd_device_list_sops = {
 543         .start = obd_device_list_seq_start,
 544         .stop = obd_device_list_seq_stop,
 545         .next = obd_device_list_seq_next,
 546         .show = obd_device_list_seq_show,
 547 };
 548
 549 static int obd_device_list_open(struct inode *inode, struct file *file)
 550 {
 551         struct proc_dir_entry *dp = PDE(inode);
 552         struct seq_file *seq;
 553         int rc = seq_open(file, &obd_device_list_sops);
 554
 555         if (rc)
 556                 return rc;
 557
 558         seq = file->private_data;
 559         seq->private = dp->data;
 560
 561         return 0;
 562 }
 563
 564 struct file_operations obd_device_list_fops = {
 565         .owner   = THIS_MODULE,
 566         .open    = obd_device_list_open,
 567         .read    = seq_read,
 568         .llseek  = seq_lseek,
 569         .release = seq_release,
 570 };
 571 #endif
 572
 573 #ifdef __KERNEL__
 574 static int __init init_obdclass(void)
 575 #else
 576 int init_obdclass(void)
 577 #endif
 578 {
 579         struct obd_device *obd;
 580 #ifdef LPROCFS
 581         struct proc_dir_entry *entry;
 582 #endif
 583         int err;
 584         int i;
 585
 586         printk(KERN_INFO "Lustre: OBD class driver Build Version: "
 587                BUILD_VERSION", info@clusterfs.com\n");
 588
 589         class_init_uuidlist();
 590         err = class_handle_init();
 591         if (err)
 592                 return err;
 593
 594         spin_lock_init(&obd_dev_lock);
 595         INIT_LIST_HEAD(&obd_types);
 596
 597         err = misc_register(&obd_psdev);
 598         if (err) {
 599                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 600                 return err;
 601         }
 602
 603         /* This struct is already zerod for us (static global) */
 604         for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
 605                 obd->obd_minor = i;
 606
 607         err = obd_init_caches();
 608         if (err)
 609                 return err;
 610
 611 #ifdef __KERNEL__
 612         obd_sysctl_init();
 613 #endif
 614
 615 #ifdef LPROCFS
 616         proc_lustre_root = proc_mkdir("lustre", proc_root_fs);
 617         if (!proc_lustre_root) {
 618                 printk(KERN_ERR
 619                        "LustreError: error registering /proc/fs/lustre\n");
 620                 RETURN(-ENOMEM);
 621         }
 622         proc_version = lprocfs_add_vars(proc_lustre_root, lprocfs_base, NULL);
 623         entry = create_proc_entry("devices", 0444, proc_lustre_root);
 624         if (entry == NULL) {
 625                 printk(KERN_ERR "LustreError: error registering "
 626                        "/proc/fs/lustre/devices\n");
 627                 lprocfs_remove(proc_lustre_root);
 628                 RETURN(-ENOMEM);
 629         }
 630         entry->proc_fops = &obd_device_list_fops;
 631 #endif
 632         return 0;
 633 }
 634
 635 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 636  * ifdef to the end of the file to cover module and versioning goo.*/
 637 #ifdef __KERNEL__
 638
 639 static void cleanup_obdclass(void)
 640 {
 641         int i;
 642         ENTRY;
 643
 644         misc_deregister(&obd_psdev);
 645         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 646                 struct obd_device *obd = &obd_dev[i];
 647                 if (obd->obd_type && obd->obd_set_up &&
 648                     OBT(obd) && OBP(obd, detach)) {
 649                         /* XXX should this call generic detach otherwise? */
 650                         OBP(obd, detach)(obd);
 651                 }
 652         }
 653
 654         obd_cleanup_caches();
 655         obd_sysctl_clean();
 656 #ifdef LPROCFS
 657         if (proc_lustre_root) {
 658                 lprocfs_remove(proc_lustre_root);
 659                 proc_lustre_root = NULL;
 660         }
 661 #endif
 662
 663         class_handle_cleanup();
 664         class_exit_uuidlist();
 665         EXIT;
 666 }
 667
 668 /* Check that we're building against the appropriate version of the Lustre
 669  * kernel patch */
 670 #include <linux/lustre_version.h>
 671 #define LUSTRE_MIN_VERSION 500
 672 #define LUSTRE_MAX_VERSION 500
 673 #if (LUSTRE_KERNEL_VERSION < LUSTRE_MIN_VERSION)
 674 # error Cannot continue: Your Lustre kernel patch is older than the sources
 675 #elif (LUSTRE_KERNEL_VERSION > LUSTRE_MAX_VERSION)
 676 # error Cannot continue: Your Lustre sources are older than the kernel patch
 677 #endif
 678
 679 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 680 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 681 MODULE_LICENSE("GPL");
 682
 683 module_init(init_obdclass);
 684 module_exit(cleanup_obdclass);
 685 #endif