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                         err = class_process_config(lcfg);
 213                 OBD_FREE(lcfg, data->ioc_plen1);
 214                 GOTO(out, err);
 215         }
 216
 217         case OBD_GET_VERSION:
 218                 if (!data->ioc_inlbuf1) {
 219                         CERROR("No buffer passed in ioctl\n");
 220                         GOTO(out, err = -EINVAL);
 221                 }
 222
 223                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 224                         CERROR("ioctl buffer too small to hold version\n");
 225                         GOTO(out, err = -EINVAL);
 226                 }
 227
 228                 memcpy(data->ioc_bulk, BUILD_VERSION,
 229                        strlen(BUILD_VERSION) + 1);
 230
 231                 err = copy_to_user((void *)arg, data, len);
 232                 if (err)
 233                         err = -EFAULT;
 234                 GOTO(out, err);
 235
 236         case OBD_IOC_NAME2DEV: {
 237                 /* Resolve a device name.  This does not change the
 238                  * currently selected device.
 239                  */
 240                 int dev;
 241
 242                 dev = class_resolve_dev_name(data->ioc_inllen1,
 243                                              data->ioc_inlbuf1);
 244                 data->ioc_dev = dev;
 245                 if (dev < 0)
 246                         GOTO(out, err = -EINVAL);
 247
 248                 err = copy_to_user((void *)arg, data, sizeof(*data));
 249                 if (err)
 250                         err = -EFAULT;
 251                 GOTO(out, err);
 252         }
 253
 254         case OBD_IOC_UUID2DEV: {
 255                 /* Resolve a device uuid.  This does not change the
 256                  * currently selected device.
 257                  */
 258                 int dev;
 259                 struct obd_uuid uuid;
 260
 261                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 262                         CERROR("No UUID passed!\n");
 263                         GOTO(out, err = -EINVAL);
 264                 }
 265                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 266                         CERROR("UUID not NUL terminated!\n");
 267                         GOTO(out, err = -EINVAL);
 268                 }
 269
 270                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 271                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 272                 dev = class_uuid2dev(&uuid);
 273                 data->ioc_dev = dev;
 274                 if (dev == -1) {
 275                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 276                                data->ioc_inlbuf1);
 277                         GOTO(out, err = -EINVAL);
 278                 }
 279
 280                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 281                        dev);
 282                 err = copy_to_user((void *)arg, data, sizeof(*data));
 283                 if (err)
 284                         err = -EFAULT;
 285                 GOTO(out, err);
 286         }
 287
 288
 289         case OBD_IOC_CLOSE_UUID: {
 290                 ptl_nid_t       peer_nid;
 291                 __u32           peer_nal;
 292                 CDEBUG(D_IOCTL, "closing all connections to uuid %s\n",
 293                        data->ioc_inlbuf1);
 294                 lustre_uuid_to_peer(data->ioc_inlbuf1, &peer_nal, &peer_nid);
 295                 GOTO(out, err = 0);
 296         }
 297
 298         }
 299
 300         if (data->ioc_dev >= MAX_OBD_DEVICES) {
 301                 CERROR("OBD ioctl: No device\n");
 302                 GOTO(out, err = -EINVAL);
 303         }
 304         obd = &obd_dev[data->ioc_dev];
 305         if (!(obd && obd->obd_set_up) || obd->obd_stopping) {
 306                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 307                 GOTO(out, err = -EINVAL);
 308         }
 309
 310         switch(cmd) {
 311         case OBD_IOC_NO_TRANSNO: {
 312                 if (!obd->obd_attached) {
 313                         CERROR("Device %d not attached\n", obd->obd_minor);
 314                         GOTO(out, err = -ENODEV);
 315                 }
 316                 CDEBUG(D_IOCTL,
 317                        "disabling committed-transno notifications on %d\n",
 318                        obd->obd_minor);
 319                 obd->obd_no_transno = 1;
 320                 GOTO(out, err = 0);
 321         }
 322
 323         default: {
 324                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 325                 if (err)
 326                         GOTO(out, err);
 327
 328                 err = copy_to_user((void *)arg, data, len);
 329                 if (err)
 330                         err = -EFAULT;
 331                 GOTO(out, err);
 332         }
 333         }
 334
 335  out:
 336         if (buf)
 337                 obd_ioctl_freedata(buf, len);
 338         RETURN(err);
 339 } /* class_handle_ioctl */
 340
 341
 342
 343 #define OBD_MINOR 241
 344 #ifdef __KERNEL__
 345 /* to control /dev/obd */
 346 static int obd_class_ioctl(struct inode *inode, struct file *filp,
 347                            unsigned int cmd, unsigned long arg)
 348 {
 349         return class_handle_ioctl(cmd, arg);
 350 }
 351
 352 /* declare character device */
 353 static struct file_operations obd_psdev_fops = {
 354         .owner   = THIS_MODULE,
 355         .ioctl   = obd_class_ioctl,     /* ioctl */
 356         .open    = obd_class_open,      /* open */
 357         .release = obd_class_release,   /* release */
 358 };
 359
 360 /* modules setup */
 361 static struct miscdevice obd_psdev = {
 362         .minor = OBD_MINOR,
 363         .name  = "obd_psdev",
 364         .fops  = &obd_psdev_fops,
 365 };
 366 #else
 367 void *obd_psdev = NULL;
 368 #endif
 369
 370 EXPORT_SYMBOL(obd_dev);
 371 EXPORT_SYMBOL(obdo_cachep);
 372 EXPORT_SYMBOL(obd_fail_loc);
 373 EXPORT_SYMBOL(obd_print_fail_loc);
 374 EXPORT_SYMBOL(obd_race_waitq);
 375 EXPORT_SYMBOL(obd_dump_on_timeout);
 376 EXPORT_SYMBOL(ldlm_timeout);
 377 EXPORT_SYMBOL(obd_timeout);
 378 EXPORT_SYMBOL(obd_lustre_upcall);
 379 EXPORT_SYMBOL(obd_sync_filter);
 380 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 381 EXPORT_SYMBOL(ptlrpc_abort_inflight_superhack);
 382 EXPORT_SYMBOL(proc_lustre_root);
 383
 384 EXPORT_SYMBOL(class_register_type);
 385 EXPORT_SYMBOL(class_unregister_type);
 386 EXPORT_SYMBOL(class_get_type);
 387 EXPORT_SYMBOL(class_put_type);
 388 EXPORT_SYMBOL(class_name2dev);
 389 EXPORT_SYMBOL(class_name2obd);
 390 EXPORT_SYMBOL(class_uuid2dev);
 391 EXPORT_SYMBOL(class_uuid2obd);
 392 EXPORT_SYMBOL(class_find_client_obd);
 393 EXPORT_SYMBOL(class_devices_in_group);
 394 EXPORT_SYMBOL(__class_export_put);
 395 EXPORT_SYMBOL(class_new_export);
 396 EXPORT_SYMBOL(class_unlink_export);
 397 EXPORT_SYMBOL(class_import_get);
 398 EXPORT_SYMBOL(class_import_put);
 399 EXPORT_SYMBOL(class_new_import);
 400 EXPORT_SYMBOL(class_destroy_import);
 401 EXPORT_SYMBOL(class_connect);
 402 EXPORT_SYMBOL(class_conn2export);
 403 EXPORT_SYMBOL(class_exp2obd);
 404 EXPORT_SYMBOL(class_conn2obd);
 405 EXPORT_SYMBOL(class_exp2cliimp);
 406 EXPORT_SYMBOL(class_conn2cliimp);
 407 EXPORT_SYMBOL(class_disconnect);
 408 EXPORT_SYMBOL(class_disconnect_exports);
 409 EXPORT_SYMBOL(class_disconnect_stale_exports);
 410
 411 EXPORT_SYMBOL(oig_init);
 412 EXPORT_SYMBOL(oig_release);
 413 EXPORT_SYMBOL(oig_add_one);
 414 EXPORT_SYMBOL(oig_wait);
 415 EXPORT_SYMBOL(oig_complete_one);
 416
 417 /* uuid.c */
 418 EXPORT_SYMBOL(class_uuid_unparse);
 419 EXPORT_SYMBOL(lustre_uuid_to_peer);
 420
 421 EXPORT_SYMBOL(class_handle_hash);
 422 EXPORT_SYMBOL(class_handle_unhash);
 423 EXPORT_SYMBOL(class_handle2object);
 424
 425 /* config.c */
 426 EXPORT_SYMBOL(class_get_profile);
 427 EXPORT_SYMBOL(class_del_profile);
 428 EXPORT_SYMBOL(class_process_config);
 429 EXPORT_SYMBOL(class_config_process_llog);
 430 EXPORT_SYMBOL(class_config_dump_llog);
 431
 432 /* mea.c */
 433 EXPORT_SYMBOL(mea_name2idx);
 434 EXPORT_SYMBOL(raw_name2idx);
 435
 436 #ifdef LPROCFS
 437 int obd_proc_read_version(char *page, char **start, off_t off, int count,
 438                           int *eof, void *data)
 439 {
 440         *eof = 1;
 441         return snprintf(page, count, "%s\n", BUILD_VERSION);
 442 }
 443
 444 int obd_proc_read_kernel_version(char *page, char **start, off_t off, int count,
 445                                  int *eof, void *data)
 446 {
 447         *eof = 1;
 448         return snprintf(page, count, "%u\n", LUSTRE_KERNEL_VERSION);
 449 }
 450
 451 int obd_proc_read_pinger(char *page, char **start, off_t off, int count,
 452                          int *eof, void *data)
 453 {
 454         *eof = 1;
 455         return snprintf(page, count, "%s\n",
 456 #ifdef ENABLE_PINGER
 457                         "on"
 458 #else
 459                         "off"
 460 #endif
 461                        );
 462 }
 463
 464 #if ENABLE_GSS
 465 /* FIXME move these staff to proper place */
 466 int (*lustre_secinit_downcall_handler)(const char *buffer,
 467                                        long count) = NULL;
 468 EXPORT_SYMBOL(lustre_secinit_downcall_handler);
 469
 470 int obd_proc_write_secinit(struct file *file, const char *buffer,
 471                            unsigned long count, void *data)
 472 {
 473         int rc = 0;
 474
 475         if (lustre_secinit_downcall_handler) {
 476                 rc = (*lustre_secinit_downcall_handler)((char *)buffer, count);
 477                 if (rc) {
 478                         LASSERT(rc < 0);
 479                         return rc;
 480                 }
 481         }
 482         return (int)count;
 483 }
 484 #endif
 485
 486 /* Root for /proc/fs/lustre */
 487 struct proc_dir_entry *proc_lustre_root = NULL;
 488 struct lprocfs_vars lprocfs_base[] = {
 489         { "version", obd_proc_read_version, NULL, NULL },
 490         { "kernel_version", obd_proc_read_kernel_version, NULL, NULL },
 491         { "pinger", obd_proc_read_pinger, NULL, NULL },
 492 #if ENABLE_GSS
 493         { "secinit", NULL, obd_proc_write_secinit, NULL },
 494 #endif
 495         { 0 }
 496 };
 497
 498 static void *obd_device_list_seq_start(struct seq_file *p, loff_t*pos)
 499 {
 500         if (*pos >= MAX_OBD_DEVICES)
 501                 return NULL;
 502         return &obd_dev[*pos];
 503 }
 504
 505 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 506 {
 507 }
 508
 509 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 510 {
 511         ++*pos;
 512         if (*pos >= MAX_OBD_DEVICES)
 513                 return NULL;
 514         return &obd_dev[*pos];
 515 }
 516
 517 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 518 {
 519         struct obd_device *obd = (struct obd_device *)v;
 520         int index = obd - &obd_dev[0];
 521         char *status;
 522
 523         if (!obd->obd_type)
 524                 return 0;
 525         if (obd->obd_stopping)
 526                 status = "ST";
 527         else if (obd->obd_set_up)
 528                 status = "UP";
 529         else if (obd->obd_attached)
 530                 status = "AT";
 531         else
 532                 status = "--";
 533
 534         return seq_printf(p, "%3d %s %s %s %s %d\n",
 535                           (int)index, status, obd->obd_type->typ_name,
 536                           obd->obd_name, obd->obd_uuid.uuid,
 537                           atomic_read(&obd->obd_refcount));
 538 }
 539
 540 struct seq_operations obd_device_list_sops = {
 541         .start = obd_device_list_seq_start,
 542         .stop = obd_device_list_seq_stop,
 543         .next = obd_device_list_seq_next,
 544         .show = obd_device_list_seq_show,
 545 };
 546
 547 static int obd_device_list_open(struct inode *inode, struct file *file)
 548 {
 549         struct proc_dir_entry *dp = PDE(inode);
 550         struct seq_file *seq;
 551         int rc = seq_open(file, &obd_device_list_sops);
 552
 553         if (rc)
 554                 return rc;
 555
 556         seq = file->private_data;
 557         seq->private = dp->data;
 558
 559         return 0;
 560 }
 561
 562 struct file_operations obd_device_list_fops = {
 563         .owner   = THIS_MODULE,
 564         .open    = obd_device_list_open,
 565         .read    = seq_read,
 566         .llseek  = seq_lseek,
 567         .release = seq_release,
 568 };
 569 #endif
 570
 571 extern int capa_cache_init(void);
 572 extern void capa_cache_cleanup(void);
 573
 574 #ifdef __KERNEL__
 575 static int __init init_obdclass(void)
 576 #else
 577 int init_obdclass(void)
 578 #endif
 579 {
 580         struct obd_device *obd;
 581 #ifdef LPROCFS
 582         struct proc_dir_entry *entry;
 583 #endif
 584         int err;
 585         int i;
 586
 587         printk(KERN_INFO "Lustre: OBD class driver Build Version: "
 588                BUILD_VERSION", info@clusterfs.com\n");
 589
 590         class_init_uuidlist();
 591         err = class_handle_init();
 592         if (err)
 593                 return err;
 594
 595         spin_lock_init(&obd_dev_lock);
 596         INIT_LIST_HEAD(&obd_types);
 597
 598         err = misc_register(&obd_psdev);
 599         if (err) {
 600                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 601                 return err;
 602         }
 603
 604         /* This struct is already zerod for us (static global) */
 605         for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
 606                 obd->obd_minor = i;
 607
 608         err = obd_init_caches();
 609         if (err)
 610                 return err;
 611
 612         err = capa_cache_init();
 613         if (err)
 614                 return err;
 615
 616 #ifdef __KERNEL__
 617         obd_sysctl_init();
 618 #endif
 619
 620 #ifdef LPROCFS
 621         proc_lustre_root = proc_mkdir("lustre", proc_root_fs);
 622         if (!proc_lustre_root) {
 623                 printk(KERN_ERR
 624                        "LustreError: error registering /proc/fs/lustre\n");
 625                 RETURN(-ENOMEM);
 626         }
 627         proc_version = lprocfs_add_vars(proc_lustre_root, lprocfs_base, NULL);
 628         entry = create_proc_entry("devices", 0444, proc_lustre_root);
 629         if (entry == NULL) {
 630                 printk(KERN_ERR "LustreError: error registering "
 631                        "/proc/fs/lustre/devices\n");
 632                 lprocfs_remove(proc_lustre_root);
 633                 RETURN(-ENOMEM);
 634         }
 635         entry->proc_fops = &obd_device_list_fops;
 636 #endif
 637         return 0;
 638 }
 639
 640 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 641  * ifdef to the end of the file to cover module and versioning goo.*/
 642 #ifdef __KERNEL__
 643
 644 static void cleanup_obdclass(void)
 645 {
 646         int i;
 647         ENTRY;
 648
 649         misc_deregister(&obd_psdev);
 650         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 651                 struct obd_device *obd = &obd_dev[i];
 652                 if (obd->obd_type && obd->obd_set_up &&
 653                     OBT(obd) && OBP(obd, detach)) {
 654                         /* XXX should this call generic detach otherwise? */
 655                         OBP(obd, detach)(obd);
 656                 }
 657         }
 658
 659         capa_cache_cleanup();
 660         obd_cleanup_caches();
 661         obd_sysctl_clean();
 662 #ifdef LPROCFS
 663         if (proc_lustre_root) {
 664                 lprocfs_remove(proc_lustre_root);
 665                 proc_lustre_root = NULL;
 666         }
 667 #endif
 668
 669         class_handle_cleanup();
 670         class_exit_uuidlist();
 671         EXIT;
 672 }
 673
 674 /* Check that we're building against the appropriate version of the Lustre
 675  * kernel patch */
 676 #include <linux/lustre_version.h>
 677 #define LUSTRE_MIN_VERSION 500
 678 #define LUSTRE_MAX_VERSION 500
 679 #if (LUSTRE_KERNEL_VERSION < LUSTRE_MIN_VERSION)
 680 # error Cannot continue: Your Lustre kernel patch is older than the sources
 681 #elif (LUSTRE_KERNEL_VERSION > LUSTRE_MAX_VERSION)
 682 # error Cannot continue: Your Lustre sources are older than the kernel patch
 683 #endif
 684
 685 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 686 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 687 MODULE_LICENSE("GPL");
 688
 689 module_init(init_obdclass);
 690 module_exit(cleanup_obdclass);
 691 #endif