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 #include <linux/lustre_build_version.h>
  67 #include <portals/list.h>
  68 #include "llog_internal.h"
  69
  70 struct semaphore obd_conf_sem;   /* serialize configuration commands */
  71 struct obd_device obd_dev[MAX_OBD_DEVICES];
  72 struct list_head obd_types;
  73 atomic_t obd_memory;
  74 int obd_memmax;
  75
  76 int proc_version;
  77
  78 /* The following are visible and mutable through /proc/sys/lustre/. */
  79 unsigned int obd_fail_loc;
  80 unsigned int obd_timeout = 100;
  81 char obd_lustre_upcall[128] = "/usr/lib/lustre/lustre_upcall";
  82 unsigned int obd_sync_filter; /* = 0, don't sync by default */
  83
  84 #ifdef __KERNEL__
  85 /*  opening /dev/obd */
  86 static int obd_class_open(struct inode * inode, struct file * file)
  87 {
  88         ENTRY;
  89
  90         PORTAL_MODULE_USE;
  91         RETURN(0);
  92 }
  93
  94 /*  closing /dev/obd */
  95 static int obd_class_release(struct inode * inode, struct file * file)
  96 {
  97         ENTRY;
  98
  99         PORTAL_MODULE_UNUSE;
 100         RETURN(0);
 101 }
 102 #endif
 103
 104 static inline void obd_data2conn(struct lustre_handle *conn,
 105                                  struct obd_ioctl_data *data)
 106 {
 107         memset(conn, 0, sizeof *conn);
 108         conn->cookie = data->ioc_cookie;
 109 }
 110
 111 static inline void obd_conn2data(struct obd_ioctl_data *data,
 112                                  struct lustre_handle *conn)
 113 {
 114         data->ioc_cookie = conn->cookie;
 115 }
 116
 117 int class_resolve_dev_name(uint32_t len, char *name)
 118 {
 119         int rc;
 120         int dev;
 121
 122         if (!len || !name) {
 123                 CERROR("No name passed,!\n");
 124                 GOTO(out, rc = -EINVAL);
 125         }
 126         if (name[len - 1] != 0) {
 127                 CERROR("Name not nul terminated!\n");
 128                 GOTO(out, rc = -EINVAL);
 129         }
 130
 131         CDEBUG(D_IOCTL, "device name %s\n", name);
 132         dev = class_name2dev(name);
 133         if (dev == -1) {
 134                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 135                 GOTO(out, rc = -EINVAL);
 136         }
 137
 138         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 139         rc = dev;
 140
 141 out:
 142         RETURN(rc);
 143 }
 144
 145 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 146 {
 147         char *buf = NULL;
 148         struct obd_ioctl_data *data;
 149         struct portals_debug_ioctl_data *debug_data;
 150         struct obd_device *obd = NULL;
 151         int err = 0, len = 0, serialised = 0;
 152         ENTRY;
 153
 154         if (current->fsuid != 0)
 155                 RETURN(err = -EACCES);
 156
 157         if ((cmd & 0xffffff00) == ((int)'T') << 8) /* ignore all tty ioctls */
 158                 RETURN(err = -ENOTTY);
 159
 160         /* only for debugging */
 161         if (cmd == PTL_IOC_DEBUG_MASK) {
 162                 debug_data = (struct portals_debug_ioctl_data*)arg;
 163                 portal_subsystem_debug = debug_data->subs;
 164                 portal_debug = debug_data->debug;
 165                 return 0;
 166         }
 167
 168         switch (cmd) {
 169         case OBD_IOC_BRW_WRITE:
 170         case OBD_IOC_BRW_READ:
 171         case OBD_IOC_GETATTR:
 172         case ECHO_IOC_ENQUEUE:
 173         case ECHO_IOC_CANCEL:
 174         case OBD_IOC_CLIENT_RECOVER:
 175         case OBD_IOC_CATLOGLIST:
 176         case OBD_IOC_LLOG_INFO:
 177         case OBD_IOC_LLOG_PRINT:
 178         case OBD_IOC_LLOG_CANCEL:
 179         case OBD_IOC_LLOG_CHECK:
 180         case OBD_IOC_LLOG_REMOVE:
 181                 break;
 182         default:
 183                 down(&obd_conf_sem);
 184                 serialised = 1;
 185                 break;
 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                 char *buf;
 198                 struct lustre_cfg *lcfg;
 199
 200                 /* FIXME hack to liblustre dump, remove when switch
 201                    to zeroconf */
 202 #ifndef __KERNEL__
 203                 data->ioc_pbuf1 = data->ioc_inlbuf1;
 204                 data->ioc_plen1 = data->ioc_inllen1;
 205 #endif
 206                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 207                         CERROR("No config buffer passed!\n");
 208                         GOTO(out, err = -EINVAL);
 209                 }
 210                 err = lustre_cfg_getdata(&buf, data->ioc_plen1,
 211                                          data->ioc_pbuf1, 0);
 212                 if (err)
 213                         GOTO(out, err);
 214                 lcfg = (struct lustre_cfg* ) buf;
 215
 216                 err = class_process_config(lcfg);
 217                 lustre_cfg_freedata(buf, data->ioc_plen1);
 218                 GOTO(out, err);
 219         }
 220
 221         case OBD_IOC_LIST: {
 222                 int i;
 223                 char *buf2 = data->ioc_bulk;
 224                 int remains = data->ioc_inllen1;
 225
 226                 if (!data->ioc_inlbuf1) {
 227                         CERROR("No buffer passed!\n");
 228                         GOTO(out, err = -EINVAL);
 229                 }
 230
 231
 232                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 233                         int l;
 234                         char *status;
 235                         struct obd_device *obd = &obd_dev[i];
 236
 237                         if (!obd->obd_type)
 238                                 continue;
 239                         if (obd->obd_stopping)
 240                                 status = "ST";
 241                         else if (obd->obd_set_up)
 242                                 status = "UP";
 243                         else if (obd->obd_attached)
 244                                 status = "AT";
 245                         else
 246                                 status = "-";
 247                         l = snprintf(buf2, remains, "%2d %s %s %s %s %d\n",
 248                                      i, status, obd->obd_type->typ_name,
 249                                      obd->obd_name, obd->obd_uuid.uuid,
 250                                      obd->obd_type->typ_refcnt);
 251                         buf2 +=l;
 252                         remains -=l;
 253                         if (remains <= 0) {
 254                                 CERROR("not enough space for device listing\n");
 255                                 break;
 256                         }
 257                 }
 258
 259                 err = copy_to_user((void *)arg, data, len);
 260                 if (err)
 261                         err = -EFAULT;
 262                 GOTO(out, err);
 263         }
 264
 265         case OBD_GET_VERSION:
 266                 if (!data->ioc_inlbuf1) {
 267                         CERROR("No buffer passed in ioctl\n");
 268                         GOTO(out, err = -EINVAL);
 269                 }
 270
 271                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 272                         CERROR("ioctl buffer too small to hold version\n");
 273                         GOTO(out, err = -EINVAL);
 274                 }
 275
 276                 memcpy(data->ioc_bulk, BUILD_VERSION,
 277                        strlen(BUILD_VERSION) + 1);
 278
 279                 err = copy_to_user((void *)arg, data, len);
 280                 if (err)
 281                         err = -EFAULT;
 282                 GOTO(out, err);
 283
 284         case OBD_IOC_NAME2DEV: {
 285                 /* Resolve a device name.  This does not change the
 286                  * currently selected device.
 287                  */
 288                 int dev;
 289
 290                 dev = class_resolve_dev_name(data->ioc_inllen1,
 291                                              data->ioc_inlbuf1);
 292                 data->ioc_dev = dev;
 293                 if (dev < 0)
 294                         GOTO(out, err = -EINVAL);
 295
 296                 err = copy_to_user((void *)arg, data, sizeof(*data));
 297                 if (err)
 298                         err = -EFAULT;
 299                 GOTO(out, err);
 300         }
 301
 302         case OBD_IOC_UUID2DEV: {
 303                 /* Resolve a device uuid.  This does not change the
 304                  * currently selected device.
 305                  */
 306                 int dev;
 307                 struct obd_uuid uuid;
 308
 309                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 310                         CERROR("No UUID passed!\n");
 311                         GOTO(out, err = -EINVAL);
 312                 }
 313                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 314                         CERROR("UUID not NUL terminated!\n");
 315                         GOTO(out, err = -EINVAL);
 316                 }
 317
 318                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 319                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 320                 dev = class_uuid2dev(&uuid);
 321                 data->ioc_dev = dev;
 322                 if (dev == -1) {
 323                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 324                                data->ioc_inlbuf1);
 325                         GOTO(out, err = -EINVAL);
 326                 }
 327
 328                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 329                        dev);
 330                 err = copy_to_user((void *)arg, data, sizeof(*data));
 331                 if (err)
 332                         err = -EFAULT;
 333                 GOTO(out, err);
 334         }
 335
 336
 337         case OBD_IOC_CLOSE_UUID: {
 338                 struct lustre_peer peer;
 339                 CDEBUG(D_IOCTL, "closing all connections to uuid %s\n",
 340                        data->ioc_inlbuf1);
 341                 lustre_uuid_to_peer(data->ioc_inlbuf1, &peer);
 342                 GOTO(out, err = 0);
 343         }
 344
 345         }
 346
 347         if (data->ioc_dev >= MAX_OBD_DEVICES) {
 348                 CERROR("OBD ioctl: No device\n");
 349                 GOTO(out, err = -EINVAL);
 350         }
 351         obd = &obd_dev[data->ioc_dev];
 352         if (!(obd && obd->obd_set_up) || obd->obd_stopping) {
 353                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 354                 GOTO(out, err = -EINVAL);
 355         }
 356
 357         switch(cmd) {
 358         case OBD_IOC_NO_TRANSNO: {
 359                 if (!obd->obd_attached) {
 360                         CERROR("Device %d not attached\n", obd->obd_minor);
 361                         GOTO(out, err = -ENODEV);
 362                 }
 363                 CDEBUG(D_IOCTL,
 364                        "disabling committed-transno notifications on %d\n",
 365                        obd->obd_minor);
 366                 obd->obd_no_transno = 1;
 367                 GOTO(out, err = 0);
 368         }
 369
 370         default: {
 371                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 372                 if (err)
 373                         GOTO(out, err);
 374
 375                 err = copy_to_user((void *)arg, data, len);
 376                 if (err)
 377                         err = -EFAULT;
 378                 GOTO(out, err);
 379         }
 380         }
 381
 382  out:
 383         if (buf)
 384                 obd_ioctl_freedata(buf, len);
 385         if (serialised)
 386                 up(&obd_conf_sem);
 387         RETURN(err);
 388 } /* class_handle_ioctl */
 389
 390
 391
 392 #define OBD_MINOR 241
 393 #ifdef __KERNEL__
 394 /* to control /dev/obd */
 395 static int obd_class_ioctl(struct inode *inode, struct file *filp,
 396                            unsigned int cmd, unsigned long arg)
 397 {
 398         return class_handle_ioctl(cmd, arg);
 399 }
 400
 401 /* declare character device */
 402 static struct file_operations obd_psdev_fops = {
 403         ioctl:   obd_class_ioctl,       /* ioctl */
 404         open:    obd_class_open,        /* open */
 405         release: obd_class_release,     /* release */
 406 };
 407
 408 /* modules setup */
 409 static struct miscdevice obd_psdev = {
 410         OBD_MINOR,
 411         "obd_psdev",
 412         &obd_psdev_fops
 413 };
 414 #else
 415 void *obd_psdev = NULL;
 416 #endif
 417
 418 EXPORT_SYMBOL(obd_dev);
 419 EXPORT_SYMBOL(obdo_cachep);
 420 EXPORT_SYMBOL(obd_memory);
 421 EXPORT_SYMBOL(obd_memmax);
 422 EXPORT_SYMBOL(obd_fail_loc);
 423 EXPORT_SYMBOL(obd_timeout);
 424 EXPORT_SYMBOL(obd_lustre_upcall);
 425 EXPORT_SYMBOL(obd_sync_filter);
 426 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 427 EXPORT_SYMBOL(ptlrpc_abort_inflight_superhack);
 428 EXPORT_SYMBOL(proc_lustre_root);
 429
 430 EXPORT_SYMBOL(class_register_type);
 431 EXPORT_SYMBOL(class_unregister_type);
 432 EXPORT_SYMBOL(class_get_type);
 433 EXPORT_SYMBOL(class_put_type);
 434 EXPORT_SYMBOL(class_name2dev);
 435 EXPORT_SYMBOL(class_name2obd);
 436 EXPORT_SYMBOL(class_uuid2dev);
 437 EXPORT_SYMBOL(class_uuid2obd);
 438 EXPORT_SYMBOL(class_find_client_obd);
 439 EXPORT_SYMBOL(__class_export_put);
 440 EXPORT_SYMBOL(class_new_export);
 441 EXPORT_SYMBOL(class_unlink_export);
 442 EXPORT_SYMBOL(class_import_get);
 443 EXPORT_SYMBOL(class_import_put);
 444 EXPORT_SYMBOL(class_new_import);
 445 EXPORT_SYMBOL(class_destroy_import);
 446 EXPORT_SYMBOL(class_connect);
 447 EXPORT_SYMBOL(class_conn2export);
 448 EXPORT_SYMBOL(class_exp2obd);
 449 EXPORT_SYMBOL(class_conn2obd);
 450 EXPORT_SYMBOL(class_exp2cliimp);
 451 EXPORT_SYMBOL(class_conn2cliimp);
 452 EXPORT_SYMBOL(class_disconnect);
 453 EXPORT_SYMBOL(class_disconnect_exports);
 454
 455 EXPORT_SYMBOL(osic_init);
 456 EXPORT_SYMBOL(osic_release);
 457 EXPORT_SYMBOL(osic_add_one);
 458 EXPORT_SYMBOL(osic_wait);
 459 EXPORT_SYMBOL(osic_complete_one);
 460
 461 /* uuid.c */
 462 EXPORT_SYMBOL(class_uuid_unparse);
 463 EXPORT_SYMBOL(lustre_uuid_to_peer);
 464
 465 EXPORT_SYMBOL(class_handle_hash);
 466 EXPORT_SYMBOL(class_handle_unhash);
 467 EXPORT_SYMBOL(class_handle2object);
 468
 469 /* config.c */
 470 EXPORT_SYMBOL(class_get_profile);
 471 EXPORT_SYMBOL(class_process_config);
 472 EXPORT_SYMBOL(class_config_parse_llog);
 473 EXPORT_SYMBOL(class_config_dump_llog);
 474 EXPORT_SYMBOL(class_attach);
 475 EXPORT_SYMBOL(class_setup);
 476 EXPORT_SYMBOL(class_cleanup);
 477 EXPORT_SYMBOL(class_detach);
 478
 479 #ifdef LPROCFS
 480 int obd_proc_read_version(char *page, char **start, off_t off, int count,
 481                           int *eof, void *data)
 482 {
 483         *eof = 1;
 484         return snprintf(page, count, "%s\n", BUILD_VERSION);
 485 }
 486
 487 int obd_proc_read_pinger(char *page, char **start, off_t off, int count,
 488                          int *eof, void *data)
 489 {
 490         *eof = 1;
 491         return snprintf(page, count, "%s\n",
 492 #ifdef ENABLE_PINGER
 493                         "on"
 494 #else
 495                         "off"
 496 #endif
 497                        );
 498 }
 499
 500 /* Root for /proc/fs/lustre */
 501 struct proc_dir_entry *proc_lustre_root = NULL;
 502 struct lprocfs_vars lprocfs_base[] = {
 503         { "version", obd_proc_read_version, NULL, NULL },
 504         { "pinger", obd_proc_read_pinger, NULL, NULL },
 505         { 0 }
 506 };
 507
 508 static void *obd_device_list_seq_start(struct seq_file *p, loff_t*pos)
 509 {
 510         if (*pos >= MAX_OBD_DEVICES)
 511                 return NULL;
 512         return &obd_dev[*pos];
 513 }
 514
 515 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 516 {
 517 }
 518
 519 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 520 {
 521         ++*pos;
 522         if (*pos >= MAX_OBD_DEVICES)
 523                 return NULL;
 524         return &obd_dev[*pos];
 525 }
 526
 527 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 528 {
 529         struct obd_device *obd = (struct obd_device *)v;
 530         int index = obd - &obd_dev[0];
 531         char *status;
 532
 533         if (!obd->obd_type)
 534                 return 0;
 535         if (obd->obd_stopping)
 536                 status = "ST";
 537         else if (obd->obd_set_up)
 538                 status = "UP";
 539         else if (obd->obd_attached)
 540                 status = "AT";
 541         else
 542                 status = "--";
 543
 544         return seq_printf(p, "%3d %s %s %s %s %d\n",
 545                           (int)index, status, obd->obd_type->typ_name,
 546                           obd->obd_name, obd->obd_uuid.uuid,
 547                           atomic_read(&obd->obd_refcount));
 548 }
 549
 550 struct seq_operations obd_device_list_sops = {
 551         .start = obd_device_list_seq_start,
 552         .stop = obd_device_list_seq_stop,
 553         .next = obd_device_list_seq_next,
 554         .show = obd_device_list_seq_show,
 555 };
 556
 557 static int obd_device_list_open(struct inode *inode, struct file *file)
 558 {
 559         struct proc_dir_entry *dp = inode->u.generic_ip;
 560         struct seq_file *seq;
 561         int rc = seq_open(file, &obd_device_list_sops);
 562
 563         if (rc)
 564                 return rc;
 565
 566         seq = file->private_data;
 567         seq->private = dp->data;
 568
 569         return 0;
 570 }
 571
 572 struct file_operations obd_device_list_fops = {
 573         .open = obd_device_list_open,
 574         .read = seq_read,
 575         .llseek = seq_lseek,
 576         .release = seq_release,
 577 };
 578 #endif
 579
 580 #ifdef __KERNEL__
 581 static int __init init_obdclass(void)
 582 #else
 583 int init_obdclass(void)
 584 #endif
 585 {
 586         struct obd_device *obd;
 587 #ifdef LPROCFS
 588         struct proc_dir_entry *entry;
 589 #endif
 590         int err;
 591         int i;
 592
 593         printk(KERN_INFO "Lustre: OBD class driver Build Version: "
 594                BUILD_VERSION", info@clusterfs.com\n");
 595
 596         class_init_uuidlist();
 597         err = class_handle_init();
 598         if (err)
 599                 return err;
 600
 601         sema_init(&obd_conf_sem, 1);
 602         INIT_LIST_HEAD(&obd_types);
 603
 604         err = misc_register(&obd_psdev);
 605         if (err) {
 606                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 607                 return err;
 608         }
 609
 610         /* This struct is already zerod for us (static global) */
 611         for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
 612                 obd->obd_minor = i;
 613
 614         err = obd_init_caches();
 615         if (err)
 616                 return err;
 617
 618 #ifdef __KERNEL__
 619         obd_sysctl_init();
 620 #endif
 621
 622 #ifdef LPROCFS
 623         proc_lustre_root = proc_mkdir("lustre", proc_root_fs);
 624         if (!proc_lustre_root) {
 625                 printk(KERN_ERR
 626                        "LustreError: error registering /proc/fs/lustre\n");
 627                 RETURN(-ENOMEM);
 628         }
 629         proc_version = lprocfs_add_vars(proc_lustre_root, lprocfs_base, NULL);
 630         entry = create_proc_entry("devices", 0444, proc_lustre_root);
 631         if (entry == NULL) {
 632                 printk(KERN_ERR "LustreError: error registering "
 633                        "/proc/fs/lustre/devices\n");
 634                 lprocfs_remove(proc_lustre_root);
 635                 RETURN(-ENOMEM);
 636         }
 637         entry->proc_fops = &obd_device_list_fops;
 638 #endif
 639         return 0;
 640 }
 641
 642 #ifdef __KERNEL__
 643 static void /*__exit*/ cleanup_obdclass(void)
 644 #else
 645 static void cleanup_obdclass(void)
 646 #endif
 647 {
 648         int i, leaked;
 649         ENTRY;
 650
 651         misc_deregister(&obd_psdev);
 652         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 653                 struct obd_device *obd = &obd_dev[i];
 654                 if (obd->obd_type && obd->obd_set_up &&
 655                     OBT(obd) && OBP(obd, detach)) {
 656                         /* XXX should this call generic detach otherwise? */
 657                         OBP(obd, detach)(obd);
 658                 }
 659         }
 660
 661         obd_cleanup_caches();
 662 #ifdef __KERNEL__
 663         obd_sysctl_clean();
 664 #endif
 665 #ifdef LPROCFS
 666         if (proc_lustre_root) {
 667                 lprocfs_remove(proc_lustre_root);
 668                 proc_lustre_root = NULL;
 669         }
 670 #endif
 671
 672         class_handle_cleanup();
 673         class_exit_uuidlist();
 674
 675         leaked = atomic_read(&obd_memory);
 676         CDEBUG(leaked ? D_ERROR : D_INFO,
 677                "obd mem max: %d leaked: %d\n", obd_memmax, leaked);
 678
 679         EXIT;
 680 }
 681
 682 /* Check that we're building against the appropriate version of the Lustre
 683  * kernel patch */
 684 #ifdef __KERNEL__
 685 #include <linux/lustre_version.h>
 686 #define LUSTRE_MIN_VERSION 28
 687 #define LUSTRE_MAX_VERSION 32
 688 #if (LUSTRE_KERNEL_VERSION < LUSTRE_MIN_VERSION)
 689 # error Cannot continue: Your Lustre kernel patch is older than the sources
 690 #elif (LUSTRE_KERNEL_VERSION > LUSTRE_MAX_VERSION)
 691 # error Cannot continue: Your Lustre sources are older than the kernel patch
 692 #endif
 693  #else
 694 # warning "Lib Lustre - no versioning information"
 695 #endif
 696
 697 #ifdef __KERNEL__
 698 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 699 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 700 MODULE_LICENSE("GPL");
 701
 702 module_init(init_obdclass);
 703 module_exit(cleanup_obdclass);
 704 #endif