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 the Lustre file system, http://www.lustre.org
   9  *   Lustre is a trademark of Cluster File Systems, Inc.
  10  *
  11  *   You may have signed or agreed to another license before downloading
  12  *   this software.  If so, you are bound by the terms and conditions
  13  *   of that agreement, and the following does not apply to you.  See the
  14  *   LICENSE file included with this distribution for more information.
  15  *
  16  *   If you did not agree to a different license, then this copy of Lustre
  17  *   is open source software; you can redistribute it and/or modify it
  18  *   under the terms of version 2 of the GNU General Public License as
  19  *   published by the Free Software Foundation.
  20  *
  21  *   In either case, Lustre is distributed in the hope that it will be
  22  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  23  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  *   license text for more details.
  25  *
  26  * These are the only exported functions, they provide some generic
  27  * infrastructure for managing object devices
  28  */
  29
  30 #define DEBUG_SUBSYSTEM S_CLASS
  31 #ifndef EXPORT_SYMTAB
  32 # define EXPORT_SYMTAB
  33 #endif
  34 #ifndef __KERNEL__
  35 # include <liblustre.h>
  36 #endif
  37
  38 #include <obd_support.h>
  39 #include <obd_class.h>
  40 #include <lustre_debug.h>
  41 #include <lprocfs_status.h>
  42 #include <lustre/lustre_build_version.h>
  43 #include <libcfs/list.h>
  44 #include "llog_internal.h"
  45
  46 #ifndef __KERNEL__
  47 /* liblustre workaround */
  48 atomic_t libcfs_kmemory = {0};
  49 #endif
  50
  51 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  52 struct list_head obd_types;
  53 spinlock_t obd_dev_lock = SPIN_LOCK_UNLOCKED;
  54
  55 /* The following are visible and mutable through /proc/sys/lustre/. */
  56 unsigned int obd_debug_peer_on_timeout;
  57 unsigned int obd_dump_on_timeout;
  58 unsigned int obd_dump_on_eviction;
  59 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  60 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  61 unsigned int obd_max_dirty_pages = 256;
  62 atomic_t obd_dirty_pages;
  63
  64 cfs_waitq_t obd_race_waitq;
  65 int obd_race_state;
  66
  67 #ifdef __KERNEL__
  68 unsigned int obd_print_fail_loc(void)
  69 {
  70         CWARN("obd_fail_loc = %x\n", obd_fail_loc);
  71         return obd_fail_loc;
  72 }
  73
  74 void obd_set_fail_loc(unsigned int fl)
  75 {
  76         obd_fail_loc = fl;
  77 }
  78
  79 /*  opening /dev/obd */
  80 static int obd_class_open(unsigned long flags, void *args)
  81 {
  82         ENTRY;
  83
  84         PORTAL_MODULE_USE;
  85         RETURN(0);
  86 }
  87
  88 /*  closing /dev/obd */
  89 static int obd_class_release(unsigned long flags, void *args)
  90 {
  91         ENTRY;
  92
  93         PORTAL_MODULE_UNUSE;
  94         RETURN(0);
  95 }
  96 #endif
  97
  98 static inline void obd_data2conn(struct lustre_handle *conn,
  99                                  struct obd_ioctl_data *data)
 100 {
 101         memset(conn, 0, sizeof *conn);
 102         conn->cookie = data->ioc_cookie;
 103 }
 104
 105 static inline void obd_conn2data(struct obd_ioctl_data *data,
 106                                  struct lustre_handle *conn)
 107 {
 108         data->ioc_cookie = conn->cookie;
 109 }
 110
 111 int class_resolve_dev_name(__u32 len, const char *name)
 112 {
 113         int rc;
 114         int dev;
 115
 116         ENTRY;
 117         if (!len || !name) {
 118                 CERROR("No name passed,!\n");
 119                 GOTO(out, rc = -EINVAL);
 120         }
 121         if (name[len - 1] != 0) {
 122                 CERROR("Name not nul terminated!\n");
 123                 GOTO(out, rc = -EINVAL);
 124         }
 125
 126         CDEBUG(D_IOCTL, "device name %s\n", name);
 127         dev = class_name2dev(name);
 128         if (dev == -1) {
 129                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 130                 GOTO(out, rc = -EINVAL);
 131         }
 132
 133         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 134         rc = dev;
 135
 136 out:
 137         RETURN(rc);
 138 }
 139
 140 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 141 {
 142         char *buf = NULL;
 143         struct obd_ioctl_data *data;
 144         struct libcfs_debug_ioctl_data *debug_data;
 145         struct obd_device *obd = NULL;
 146         int err = 0, len = 0;
 147         ENTRY;
 148
 149         /* only for debugging */
 150         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 151                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 152                 libcfs_subsystem_debug = debug_data->subs;
 153                 libcfs_debug = debug_data->debug;
 154                 return 0;
 155         }
 156
 157         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 158         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 159                 CERROR("OBD ioctl: data error\n");
 160                 GOTO(out, err = -EINVAL);
 161         }
 162         data = (struct obd_ioctl_data *)buf;
 163
 164         switch (cmd) {
 165         case OBD_IOC_PROCESS_CFG: {
 166                 struct lustre_cfg *lcfg;
 167
 168                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 169                         CERROR("No config buffer passed!\n");
 170                         GOTO(out, err = -EINVAL);
 171                 }
 172                 OBD_ALLOC(lcfg, data->ioc_plen1);
 173                 if (lcfg == NULL)
 174                         GOTO(out, err = -ENOMEM);
 175                 err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1);
 176                 if (!err)
 177                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 178                 if (!err)
 179                         err = class_process_config(lcfg);
 180                 OBD_FREE(lcfg, data->ioc_plen1);
 181                 GOTO(out, err);
 182         }
 183
 184         case OBD_GET_VERSION:
 185                 if (!data->ioc_inlbuf1) {
 186                         CERROR("No buffer passed in ioctl\n");
 187                         GOTO(out, err = -EINVAL);
 188                 }
 189
 190                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 191                         CERROR("ioctl buffer too small to hold version\n");
 192                         GOTO(out, err = -EINVAL);
 193                 }
 194
 195                 memcpy(data->ioc_bulk, BUILD_VERSION,
 196                        strlen(BUILD_VERSION) + 1);
 197
 198                 err = obd_ioctl_popdata((void *)arg, data, len);
 199                 if (err)
 200                         err = -EFAULT;
 201                 GOTO(out, err);
 202
 203         case OBD_IOC_NAME2DEV: {
 204                 /* Resolve a device name.  This does not change the
 205                  * currently selected device.
 206                  */
 207                 int dev;
 208
 209                 dev = class_resolve_dev_name(data->ioc_inllen1,
 210                                              data->ioc_inlbuf1);
 211                 data->ioc_dev = dev;
 212                 if (dev < 0)
 213                         GOTO(out, err = -EINVAL);
 214
 215                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 216                 if (err)
 217                         err = -EFAULT;
 218                 GOTO(out, err);
 219         }
 220
 221         case OBD_IOC_UUID2DEV: {
 222                 /* Resolve a device uuid.  This does not change the
 223                  * currently selected device.
 224                  */
 225                 int dev;
 226                 struct obd_uuid uuid;
 227
 228                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 229                         CERROR("No UUID passed!\n");
 230                         GOTO(out, err = -EINVAL);
 231                 }
 232                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 233                         CERROR("UUID not NUL terminated!\n");
 234                         GOTO(out, err = -EINVAL);
 235                 }
 236
 237                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 238                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 239                 dev = class_uuid2dev(&uuid);
 240                 data->ioc_dev = dev;
 241                 if (dev == -1) {
 242                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 243                                data->ioc_inlbuf1);
 244                         GOTO(out, err = -EINVAL);
 245                 }
 246
 247                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 248                        dev);
 249                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 250                 if (err)
 251                         err = -EFAULT;
 252                 GOTO(out, err);
 253         }
 254
 255         case OBD_IOC_CLOSE_UUID: {
 256                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 257                        data->ioc_inlbuf1);
 258                 GOTO(out, err = 0);
 259         }
 260
 261         case OBD_IOC_GETDEVICE: {
 262                 int     index = data->ioc_count;
 263                 char    *status, *str;
 264
 265                 if (!data->ioc_inlbuf1) {
 266                         CERROR("No buffer passed in ioctl\n");
 267                         GOTO(out, err = -EINVAL);
 268                 }
 269                 if (data->ioc_inllen1 < 128) {
 270                         CERROR("ioctl buffer too small to hold version\n");
 271                         GOTO(out, err = -EINVAL);
 272                 }
 273
 274                 obd = class_num2obd(index);
 275                 if (!obd)
 276                         GOTO(out, err = -ENOENT);
 277
 278                 if (obd->obd_stopping)
 279                         status = "ST";
 280                 else if (obd->obd_set_up)
 281                         status = "UP";
 282                 else if (obd->obd_attached)
 283                         status = "AT";
 284                 else
 285                         status = "--";
 286                 str = (char *)data->ioc_bulk;
 287                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 288                          (int)index, status, obd->obd_type->typ_name,
 289                          obd->obd_name, obd->obd_uuid.uuid,
 290                          atomic_read(&obd->obd_refcount));
 291                 err = obd_ioctl_popdata((void *)arg, data, len);
 292
 293                 GOTO(out, err = 0);
 294         }
 295
 296         }
 297
 298         if (data->ioc_dev >= class_devno_max()) {
 299                 CERROR("OBD ioctl: No device\n");
 300                 GOTO(out, err = -EINVAL);
 301         }
 302
 303         obd = class_num2obd(data->ioc_dev);
 304         if (obd == NULL) {
 305                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 306                 GOTO(out, err = -EINVAL);
 307         }
 308         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 309
 310         if (!obd->obd_set_up || obd->obd_stopping) {
 311                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 312                 GOTO(out, err = -EINVAL);
 313         }
 314
 315         switch(cmd) {
 316         case OBD_IOC_NO_TRANSNO: {
 317                 if (!obd->obd_attached) {
 318                         CERROR("Device %d not attached\n", obd->obd_minor);
 319                         GOTO(out, err = -ENODEV);
 320                 }
 321                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 322                        obd->obd_name);
 323                 obd->obd_no_transno = 1;
 324                 GOTO(out, err = 0);
 325         }
 326
 327         default: {
 328                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 329                 if (err)
 330                         GOTO(out, err);
 331
 332                 err = obd_ioctl_popdata((void *)arg, data, len);
 333                 if (err)
 334                         err = -EFAULT;
 335                 GOTO(out, err);
 336         }
 337         }
 338
 339  out:
 340         if (buf)
 341                 obd_ioctl_freedata(buf, len);
 342         RETURN(err);
 343 } /* class_handle_ioctl */
 344
 345
 346
 347 #define OBD_MINOR 241
 348 #ifdef __KERNEL__
 349 /* to control /dev/obd */
 350 static int obd_class_ioctl (struct cfs_psdev_file *pfile, unsigned long cmd,
 351                             void *arg)
 352 {
 353         return class_handle_ioctl(cmd, (unsigned long)arg);
 354 }
 355
 356 /* declare character device */
 357 struct cfs_psdev_ops obd_psdev_ops = {
 358         /* .p_open    = */ obd_class_open,      /* open */
 359         /* .p_close   = */ obd_class_release,   /* release */
 360         /* .p_read    = */ NULL,
 361         /* .p_write   = */ NULL,
 362         /* .p_ioctl   = */ obd_class_ioctl     /* ioctl */
 363 };
 364
 365 extern cfs_psdev_t obd_psdev;
 366 #else
 367 void *obd_psdev = NULL;
 368 #endif
 369
 370 EXPORT_SYMBOL(obd_devs);
 371 EXPORT_SYMBOL(obd_print_fail_loc);
 372 EXPORT_SYMBOL(obd_race_waitq);
 373 EXPORT_SYMBOL(obd_race_state);
 374 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 375 EXPORT_SYMBOL(obd_dump_on_timeout);
 376 EXPORT_SYMBOL(obd_dump_on_eviction);
 377 EXPORT_SYMBOL(obd_timeout);
 378 EXPORT_SYMBOL(ldlm_timeout);
 379 EXPORT_SYMBOL(obd_max_dirty_pages);
 380 EXPORT_SYMBOL(obd_dirty_pages);
 381 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 382
 383 EXPORT_SYMBOL(proc_lustre_root);
 384
 385 EXPORT_SYMBOL(class_register_type);
 386 EXPORT_SYMBOL(class_unregister_type);
 387 EXPORT_SYMBOL(class_get_type);
 388 EXPORT_SYMBOL(class_put_type);
 389 EXPORT_SYMBOL(class_name2dev);
 390 EXPORT_SYMBOL(class_name2obd);
 391 EXPORT_SYMBOL(class_uuid2dev);
 392 EXPORT_SYMBOL(class_uuid2obd);
 393 EXPORT_SYMBOL(class_find_client_obd);
 394 EXPORT_SYMBOL(class_find_client_notype);
 395 EXPORT_SYMBOL(class_devices_in_group);
 396 EXPORT_SYMBOL(class_conn2export);
 397 EXPORT_SYMBOL(class_exp2obd);
 398 EXPORT_SYMBOL(class_conn2obd);
 399 EXPORT_SYMBOL(class_exp2cliimp);
 400 EXPORT_SYMBOL(class_conn2cliimp);
 401 EXPORT_SYMBOL(class_disconnect);
 402 EXPORT_SYMBOL(class_num2obd);
 403
 404 /* uuid.c */
 405 EXPORT_SYMBOL(class_uuid_unparse);
 406 EXPORT_SYMBOL(lustre_uuid_to_peer);
 407
 408 EXPORT_SYMBOL(class_handle_hash);
 409 EXPORT_SYMBOL(class_handle_unhash);
 410 EXPORT_SYMBOL(class_handle2object);
 411 EXPORT_SYMBOL(class_handle_free_cb);
 412
 413 /* obd_config.c */
 414 EXPORT_SYMBOL(class_incref);
 415 EXPORT_SYMBOL(class_decref);
 416 EXPORT_SYMBOL(class_get_profile);
 417 EXPORT_SYMBOL(class_del_profile);
 418 EXPORT_SYMBOL(class_del_profiles);
 419 EXPORT_SYMBOL(class_process_config);
 420 EXPORT_SYMBOL(class_process_proc_param);
 421 EXPORT_SYMBOL(class_config_parse_llog);
 422 EXPORT_SYMBOL(class_config_dump_llog);
 423 EXPORT_SYMBOL(class_attach);
 424 EXPORT_SYMBOL(class_setup);
 425 EXPORT_SYMBOL(class_cleanup);
 426 EXPORT_SYMBOL(class_detach);
 427 EXPORT_SYMBOL(class_manual_cleanup);
 428
 429 #define OBD_INIT_CHECK
 430 #ifdef OBD_INIT_CHECK
 431 int obd_init_checks(void)
 432 {
 433         __u64 u64val, div64val;
 434         char buf[64];
 435         int len, ret = 0;
 436
 437         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s, LPSZ=%s, LPSSZ=%s\n",
 438                LPU64, LPD64, LPX64, LPSZ, LPSSZ);
 439
 440         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 441
 442         u64val = OBD_OBJECT_EOF;
 443         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 444         if (u64val != OBD_OBJECT_EOF) {
 445                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 446                        u64val, (int)sizeof(u64val));
 447                 ret = -EINVAL;
 448         }
 449         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 450         if (len != 18) {
 451                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 452                 ret = -EINVAL;
 453         }
 454
 455         div64val = OBD_OBJECT_EOF;
 456         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 457         if (u64val != OBD_OBJECT_EOF) {
 458                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 459                        u64val, (int)sizeof(u64val));
 460                 ret = -EOVERFLOW;
 461         }
 462         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 463                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 464                        u64val, (int)sizeof(u64val));
 465                 return -EOVERFLOW;
 466         }
 467         if (do_div(div64val, 256) != (u64val & 255)) {
 468                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 469                 return -EOVERFLOW;
 470         }
 471         if (u64val >> 8 != div64val) {
 472                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 473                        u64val, div64val, u64val >> 8);
 474                 return -EOVERFLOW;
 475         }
 476         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 477         if (len != 18) {
 478                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 479                 ret = -EINVAL;
 480         }
 481         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 482         if (len != 20) {
 483                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 484                 ret = -EINVAL;
 485         }
 486         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 487         if (len != 2) {
 488                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 489                 ret = -EINVAL;
 490         }
 491         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 492                 CWARN("mask failed: u64val "LPU64" >= %lu\n", u64val,
 493                       CFS_PAGE_SIZE);
 494                 ret = -EINVAL;
 495         }
 496
 497         return ret;
 498 }
 499 #else
 500 #define obd_init_checks() do {} while(0)
 501 #endif
 502
 503 extern spinlock_t obd_types_lock;
 504 extern int class_procfs_init(void);
 505 extern int class_procfs_clean(void);
 506
 507 #ifdef __KERNEL__
 508 static int __init init_obdclass(void)
 509 #else
 510 int init_obdclass(void)
 511 #endif
 512 {
 513         int i, err;
 514 #ifdef __KERNEL__
 515         int lustre_register_fs(void);
 516
 517         printk(KERN_INFO "Lustre: OBD class driver, info@clusterfs.com\n");
 518         printk(KERN_INFO "        Lustre Version: "LUSTRE_VERSION_STRING"\n");
 519         printk(KERN_INFO "        Build Version: "BUILD_VERSION"\n");
 520 #else
 521         CDEBUG(D_INFO, "Lustre: OBD class driver, info@clusterfs.com\n");
 522         CDEBUG(D_INFO, "        Lustre Version: "LUSTRE_VERSION_STRING"\n");
 523         CDEBUG(D_INFO, "        Build Version: "BUILD_VERSION"\n");
 524 #endif
 525
 526         spin_lock_init(&obd_types_lock);
 527         cfs_waitq_init(&obd_race_waitq);
 528         obd_zombie_impexp_init();
 529 #ifdef LPROCFS
 530         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 531                                          LPROCFS_STATS_FLAG_PERCPU);
 532         if (obd_memory == NULL) {
 533                 CERROR("kmalloc of 'obd_memory' failed\n");
 534                 RETURN(-ENOMEM);
 535         }
 536
 537         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 538                              LPROCFS_CNTR_AVGMINMAX,
 539                              "memused", "bytes");
 540         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 541                              LPROCFS_CNTR_AVGMINMAX,
 542                              "pagesused", "pages");
 543 #endif
 544         err = obd_init_checks();
 545         if (err == -EOVERFLOW)
 546                 return err;
 547
 548         class_init_uuidlist();
 549         err = class_handle_init();
 550         if (err)
 551                 return err;
 552
 553         spin_lock_init(&obd_dev_lock);
 554         CFS_INIT_LIST_HEAD(&obd_types);
 555
 556         err = cfs_psdev_register(&obd_psdev);
 557         if (err) {
 558                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 559                 return err;
 560         }
 561
 562         /* This struct is already zerod for us (static global) */
 563         for (i = 0; i < class_devno_max(); i++)
 564                 obd_devs[i] = NULL;
 565
 566         /* Default the dirty page cache cap to 1/2 of system memory */
 567         obd_max_dirty_pages = num_physpages / 2;
 568
 569         err = obd_init_caches();
 570         if (err)
 571                 return err;
 572 #ifdef __KERNEL__
 573         err = class_procfs_init();
 574         if (err)
 575                 return err;
 576         err = lustre_register_fs();
 577 #endif
 578
 579         return err;
 580 }
 581
 582 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 583  * ifdef to the end of the file to cover module and versioning goo.*/
 584 #ifdef __KERNEL__
 585 static void cleanup_obdclass(void)
 586 {
 587         int i;
 588         __u64 memory_leaked, pages_leaked;
 589         __u64 memory_max, pages_max;
 590         int lustre_unregister_fs(void);
 591         ENTRY;
 592
 593         lustre_unregister_fs();
 594
 595         cfs_psdev_deregister(&obd_psdev);
 596         for (i = 0; i < class_devno_max(); i++) {
 597                 struct obd_device *obd = class_num2obd(i);
 598                 if (obd && obd->obd_set_up &&
 599                     OBT(obd) && OBP(obd, detach)) {
 600                         /* XXX should this call generic detach otherwise? */
 601                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 602                         OBP(obd, detach)(obd);
 603                 }
 604         }
 605
 606         obd_cleanup_caches();
 607         obd_sysctl_clean();
 608
 609         class_procfs_clean();
 610
 611         class_handle_cleanup();
 612         class_exit_uuidlist();
 613
 614         memory_leaked = obd_memory_sum();
 615         pages_leaked = obd_pages_sum();
 616
 617         memory_max = obd_memory_max();
 618         pages_max = obd_pages_max();
 619
 620         lprocfs_free_stats(&obd_memory);
 621         CDEBUG((memory_leaked | pages_leaked) ? D_ERROR : D_INFO,
 622                "obd_memory max: "LPU64", leaked: "LPU64" "
 623                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 624                memory_max, memory_leaked,
 625                pages_max, pages_leaked);
 626
 627         EXIT;
 628 }
 629
 630 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 631 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 632 MODULE_LICENSE("GPL");
 633
 634 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 635 #endif