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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_CLASS
  38 #ifndef EXPORT_SYMTAB
  39 # define EXPORT_SYMTAB
  40 #endif
  41 #ifndef __KERNEL__
  42 # include <liblustre.h>
  43 #else
  44 # include <asm/atomic.h>
  45 #endif
  46
  47 #include <obd_support.h>
  48 #include <obd_class.h>
  49 #include <lnet/lnetctl.h>
  50 #include <lustre_debug.h>
  51 #include <lprocfs_status.h>
  52 #include <lustre/lustre_build_version.h>
  53 #include <libcfs/list.h>
  54 #include "llog_internal.h"
  55
  56 #ifndef __KERNEL__
  57 /* liblustre workaround */
  58 cfs_atomic_t libcfs_kmemory = {0};
  59 #endif
  60
  61 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  62 cfs_list_t obd_types;
  63 cfs_spinlock_t obd_dev_lock = CFS_SPIN_LOCK_UNLOCKED;
  64
  65 #ifndef __KERNEL__
  66 __u64 obd_max_pages = 0;
  67 __u64 obd_max_alloc = 0;
  68 __u64 obd_alloc;
  69 __u64 obd_pages;
  70 #endif
  71
  72 /* The following are visible and mutable through /proc/sys/lustre/. */
  73 unsigned int obd_debug_peer_on_timeout;
  74 unsigned int obd_dump_on_timeout;
  75 unsigned int obd_dump_on_eviction;
  76 unsigned int obd_max_dirty_pages = 256;
  77 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  78 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  79 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  80 unsigned int at_min = 0;
  81 unsigned int at_max = 600;
  82 unsigned int at_history = 600;
  83 int at_early_margin = 5;
  84 int at_extra = 30;
  85
  86 cfs_atomic_t obd_dirty_pages;
  87 cfs_atomic_t obd_dirty_transit_pages;
  88
  89 cfs_waitq_t obd_race_waitq;
  90 int obd_race_state;
  91
  92 #ifdef __KERNEL__
  93 unsigned long obd_print_fail_loc(void)
  94 {
  95         CWARN("obd_fail_loc = %lx\n", obd_fail_loc);
  96         return obd_fail_loc;
  97 }
  98 #endif
  99
 100 static inline void obd_data2conn(struct lustre_handle *conn,
 101                                  struct obd_ioctl_data *data)
 102 {
 103         memset(conn, 0, sizeof *conn);
 104         conn->cookie = data->ioc_cookie;
 105 }
 106
 107 static inline void obd_conn2data(struct obd_ioctl_data *data,
 108                                  struct lustre_handle *conn)
 109 {
 110         data->ioc_cookie = conn->cookie;
 111 }
 112
 113 int class_resolve_dev_name(__u32 len, const char *name)
 114 {
 115         int rc;
 116         int dev;
 117
 118         ENTRY;
 119         if (!len || !name) {
 120                 CERROR("No name passed,!\n");
 121                 GOTO(out, rc = -EINVAL);
 122         }
 123         if (name[len - 1] != 0) {
 124                 CERROR("Name not nul terminated!\n");
 125                 GOTO(out, rc = -EINVAL);
 126         }
 127
 128         CDEBUG(D_IOCTL, "device name %s\n", name);
 129         dev = class_name2dev(name);
 130         if (dev == -1) {
 131                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 132                 GOTO(out, rc = -EINVAL);
 133         }
 134
 135         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 136         rc = dev;
 137
 138 out:
 139         RETURN(rc);
 140 }
 141
 142 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 143 {
 144         char *buf = NULL;
 145         struct obd_ioctl_data *data;
 146         struct libcfs_debug_ioctl_data *debug_data;
 147         struct obd_device *obd = NULL;
 148         int err = 0, len = 0;
 149         ENTRY;
 150
 151         /* only for debugging */
 152         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 153                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 154                 libcfs_subsystem_debug = debug_data->subs;
 155                 libcfs_debug = debug_data->debug;
 156                 return 0;
 157         }
 158
 159         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 160         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 161                 CERROR("OBD ioctl: data error\n");
 162                 RETURN(-EINVAL);
 163         }
 164         data = (struct obd_ioctl_data *)buf;
 165
 166         switch (cmd) {
 167         case OBD_IOC_PROCESS_CFG: {
 168                 struct lustre_cfg *lcfg;
 169
 170                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 171                         CERROR("No config buffer passed!\n");
 172                         GOTO(out, err = -EINVAL);
 173                 }
 174                 OBD_ALLOC(lcfg, data->ioc_plen1);
 175                 if (lcfg == NULL)
 176                         GOTO(out, err = -ENOMEM);
 177                 err = cfs_copy_from_user(lcfg, data->ioc_pbuf1,
 178                                          data->ioc_plen1);
 179                 if (!err)
 180                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 181                 if (!err)
 182                         err = class_process_config(lcfg);
 183
 184                 OBD_FREE(lcfg, data->ioc_plen1);
 185                 GOTO(out, err);
 186         }
 187
 188         case OBD_GET_VERSION:
 189                 if (!data->ioc_inlbuf1) {
 190                         CERROR("No buffer passed in ioctl\n");
 191                         GOTO(out, err = -EINVAL);
 192                 }
 193
 194                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 195                         CERROR("ioctl buffer too small to hold version\n");
 196                         GOTO(out, err = -EINVAL);
 197                 }
 198
 199                 memcpy(data->ioc_bulk, BUILD_VERSION,
 200                        strlen(BUILD_VERSION) + 1);
 201
 202                 err = obd_ioctl_popdata((void *)arg, data, len);
 203                 if (err)
 204                         err = -EFAULT;
 205                 GOTO(out, err);
 206
 207         case OBD_IOC_NAME2DEV: {
 208                 /* Resolve a device name.  This does not change the
 209                  * currently selected device.
 210                  */
 211                 int dev;
 212
 213                 dev = class_resolve_dev_name(data->ioc_inllen1,
 214                                              data->ioc_inlbuf1);
 215                 data->ioc_dev = dev;
 216                 if (dev < 0)
 217                         GOTO(out, err = -EINVAL);
 218
 219                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 220                 if (err)
 221                         err = -EFAULT;
 222                 GOTO(out, err);
 223         }
 224
 225         case OBD_IOC_UUID2DEV: {
 226                 /* Resolve a device uuid.  This does not change the
 227                  * currently selected device.
 228                  */
 229                 int dev;
 230                 struct obd_uuid uuid;
 231
 232                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 233                         CERROR("No UUID passed!\n");
 234                         GOTO(out, err = -EINVAL);
 235                 }
 236                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 237                         CERROR("UUID not NUL terminated!\n");
 238                         GOTO(out, err = -EINVAL);
 239                 }
 240
 241                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 242                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 243                 dev = class_uuid2dev(&uuid);
 244                 data->ioc_dev = dev;
 245                 if (dev == -1) {
 246                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 247                                data->ioc_inlbuf1);
 248                         GOTO(out, err = -EINVAL);
 249                 }
 250
 251                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 252                        dev);
 253                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 254                 if (err)
 255                         err = -EFAULT;
 256                 GOTO(out, err);
 257         }
 258
 259         case OBD_IOC_CLOSE_UUID: {
 260                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 261                        data->ioc_inlbuf1);
 262                 GOTO(out, err = 0);
 263         }
 264
 265         case OBD_IOC_GETDEVICE: {
 266                 int     index = data->ioc_count;
 267                 const char *status;
 268                 char    *str;
 269
 270                 if (!data->ioc_inlbuf1) {
 271                         CERROR("No buffer passed in ioctl\n");
 272                         GOTO(out, err = -EINVAL);
 273                 }
 274                 if (data->ioc_inllen1 < 128) {
 275                         CERROR("ioctl buffer too small to hold version\n");
 276                         GOTO(out, err = -EINVAL);
 277                 }
 278
 279                 obd = class_num2obd(index);
 280                 if (!obd)
 281                         GOTO(out, err = -ENOENT);
 282
 283                 status = obd_dev_status(obd);
 284                 str = (char *)data->ioc_bulk;
 285                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 286                          (int)index, status, obd->obd_type->typ_name,
 287                          obd->obd_name, obd->obd_uuid.uuid,
 288                          cfs_atomic_read(&obd->obd_refcount));
 289                 err = obd_ioctl_popdata((void *)arg, data, len);
 290
 291                 GOTO(out, err = 0);
 292         }
 293
 294         }
 295
 296         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 297                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 298                         GOTO(out, err = -EINVAL);
 299                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 300                         GOTO(out, err = -EINVAL);
 301                 obd = class_name2obd(data->ioc_inlbuf4);
 302         } else if (obd_minor_valid(data->ioc_dev)) {
 303                 /* XXX = max allocated minor */
 304                 obd = class_num2obd(data->ioc_dev);
 305         } else {
 306                 CERROR("OBD ioctl: No device\n");
 307                 GOTO(out, err = -EINVAL);
 308         }
 309
 310         if (obd == NULL) {
 311                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 312                 GOTO(out, err = -EINVAL);
 313         }
 314         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 315
 316         if (!obd->obd_set_up || obd->obd_stopping) {
 317                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 318                 GOTO(out, err = -EINVAL);
 319         }
 320
 321         switch(cmd) {
 322         case OBD_IOC_NO_TRANSNO: {
 323                 if (!obd->obd_attached) {
 324                         CERROR("Device %d not attached\n", obd->obd_minor);
 325                         GOTO(out, err = -ENODEV);
 326                 }
 327                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 328                        obd->obd_name);
 329                 obd->obd_no_transno = 1;
 330                 GOTO(out, err = 0);
 331         }
 332
 333         default: {
 334                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 335                 if (err)
 336                         GOTO(out, err);
 337
 338                 err = obd_ioctl_popdata((void *)arg, data, len);
 339                 if (err)
 340                         err = -EFAULT;
 341                 GOTO(out, err);
 342         }
 343         }
 344
 345  out:
 346         if (buf)
 347                 obd_ioctl_freedata(buf, len);
 348         RETURN(err);
 349 } /* class_handle_ioctl */
 350
 351
 352
 353 #ifdef __KERNEL__
 354 extern cfs_psdev_t obd_psdev;
 355 #else
 356 void *obd_psdev = NULL;
 357 #endif
 358
 359 EXPORT_SYMBOL(obd_devs);
 360 EXPORT_SYMBOL(obd_print_fail_loc);
 361 EXPORT_SYMBOL(obd_race_waitq);
 362 EXPORT_SYMBOL(obd_race_state);
 363 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 364 EXPORT_SYMBOL(obd_dump_on_timeout);
 365 EXPORT_SYMBOL(obd_dump_on_eviction);
 366 EXPORT_SYMBOL(obd_timeout);
 367 EXPORT_SYMBOL(ldlm_timeout);
 368 EXPORT_SYMBOL(obd_max_dirty_pages);
 369 EXPORT_SYMBOL(obd_dirty_pages);
 370 EXPORT_SYMBOL(obd_dirty_transit_pages);
 371 EXPORT_SYMBOL(at_min);
 372 EXPORT_SYMBOL(at_max);
 373 EXPORT_SYMBOL(at_extra);
 374 EXPORT_SYMBOL(at_early_margin);
 375 EXPORT_SYMBOL(at_history);
 376 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 377
 378 EXPORT_SYMBOL(proc_lustre_root);
 379
 380 EXPORT_SYMBOL(class_register_type);
 381 EXPORT_SYMBOL(class_unregister_type);
 382 EXPORT_SYMBOL(class_get_type);
 383 EXPORT_SYMBOL(class_put_type);
 384 EXPORT_SYMBOL(class_name2obd);
 385 EXPORT_SYMBOL(class_uuid2obd);
 386 EXPORT_SYMBOL(class_find_client_obd);
 387 EXPORT_SYMBOL(class_devices_in_group);
 388 EXPORT_SYMBOL(class_conn2export);
 389 EXPORT_SYMBOL(class_exp2obd);
 390 EXPORT_SYMBOL(class_conn2obd);
 391 EXPORT_SYMBOL(class_exp2cliimp);
 392 EXPORT_SYMBOL(class_conn2cliimp);
 393 EXPORT_SYMBOL(class_disconnect);
 394 EXPORT_SYMBOL(class_num2obd);
 395
 396 /* uuid.c */
 397 EXPORT_SYMBOL(class_uuid_unparse);
 398 EXPORT_SYMBOL(lustre_uuid_to_peer);
 399
 400 EXPORT_SYMBOL(class_handle_hash);
 401 EXPORT_SYMBOL(class_handle_unhash);
 402 EXPORT_SYMBOL(class_handle_hash_back);
 403 EXPORT_SYMBOL(class_handle2object);
 404 EXPORT_SYMBOL(class_handle_free_cb);
 405
 406 /* obd_config.c */
 407 EXPORT_SYMBOL(class_incref);
 408 EXPORT_SYMBOL(class_decref);
 409 EXPORT_SYMBOL(class_get_profile);
 410 EXPORT_SYMBOL(class_del_profile);
 411 EXPORT_SYMBOL(class_del_profiles);
 412 EXPORT_SYMBOL(class_process_config);
 413 EXPORT_SYMBOL(class_process_proc_param);
 414 EXPORT_SYMBOL(class_config_parse_llog);
 415 EXPORT_SYMBOL(class_config_dump_llog);
 416 EXPORT_SYMBOL(class_attach);
 417 EXPORT_SYMBOL(class_setup);
 418 EXPORT_SYMBOL(class_cleanup);
 419 EXPORT_SYMBOL(class_detach);
 420 EXPORT_SYMBOL(class_manual_cleanup);
 421
 422 /* mea.c */
 423 EXPORT_SYMBOL(mea_name2idx);
 424 EXPORT_SYMBOL(raw_name2idx);
 425
 426 #define OBD_INIT_CHECK
 427 #ifdef OBD_INIT_CHECK
 428 int obd_init_checks(void)
 429 {
 430         __u64 u64val, div64val;
 431         char buf[64];
 432         int len, ret = 0;
 433
 434         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 435
 436         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 437
 438         u64val = OBD_OBJECT_EOF;
 439         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 440         if (u64val != OBD_OBJECT_EOF) {
 441                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 442                        u64val, (int)sizeof(u64val));
 443                 ret = -EINVAL;
 444         }
 445         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 446         if (len != 18) {
 447                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 448                 ret = -EINVAL;
 449         }
 450
 451         div64val = OBD_OBJECT_EOF;
 452         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 453         if (u64val != OBD_OBJECT_EOF) {
 454                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 455                        u64val, (int)sizeof(u64val));
 456                 ret = -EOVERFLOW;
 457         }
 458         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 459                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 460                        u64val, (int)sizeof(u64val));
 461                 return -EOVERFLOW;
 462         }
 463         if (do_div(div64val, 256) != (u64val & 255)) {
 464                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 465                 return -EOVERFLOW;
 466         }
 467         if (u64val >> 8 != div64val) {
 468                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 469                        u64val, div64val, u64val >> 8);
 470                 return -EOVERFLOW;
 471         }
 472         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 473         if (len != 18) {
 474                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 475                 ret = -EINVAL;
 476         }
 477         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 478         if (len != 20) {
 479                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 480                 ret = -EINVAL;
 481         }
 482         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 483         if (len != 2) {
 484                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 485                 ret = -EINVAL;
 486         }
 487         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 488                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 489                       (__u64)CFS_PAGE_SIZE);
 490                 ret = -EINVAL;
 491         }
 492
 493         return ret;
 494 }
 495 #else
 496 #define obd_init_checks() do {} while(0)
 497 #endif
 498
 499 extern cfs_spinlock_t obd_types_lock;
 500 extern int class_procfs_init(void);
 501 extern int class_procfs_clean(void);
 502
 503 #ifdef __KERNEL__
 504 static int __init init_obdclass(void)
 505 #else
 506 int init_obdclass(void)
 507 #endif
 508 {
 509         int err;
 510 #ifdef __KERNEL__
 511         int i;
 512         int lustre_register_fs(void);
 513
 514         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 515                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 516 #endif
 517
 518         LCONSOLE_INFO("OBD class driver, http://www.lustre.org/\n");
 519         LCONSOLE_INFO("        Lustre Version: "LUSTRE_VERSION_STRING"\n");
 520         LCONSOLE_INFO("        Build Version: "BUILD_VERSION"\n");
 521
 522         cfs_spin_lock_init(&obd_types_lock);
 523         cfs_waitq_init(&obd_race_waitq);
 524         obd_zombie_impexp_init();
 525 #ifdef LPROCFS
 526         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 527                                          LPROCFS_STATS_FLAG_NONE);
 528         if (obd_memory == NULL) {
 529                 CERROR("kmalloc of 'obd_memory' failed\n");
 530                 RETURN(-ENOMEM);
 531         }
 532
 533         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 534                              LPROCFS_CNTR_AVGMINMAX,
 535                              "memused", "bytes");
 536         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 537                              LPROCFS_CNTR_AVGMINMAX,
 538                              "pagesused", "pages");
 539 #endif
 540         err = obd_init_checks();
 541         if (err == -EOVERFLOW)
 542                 return err;
 543
 544         class_init_uuidlist();
 545         err = class_handle_init();
 546         if (err)
 547                 return err;
 548
 549         cfs_spin_lock_init(&obd_dev_lock);
 550         CFS_INIT_LIST_HEAD(&obd_types);
 551
 552         err = cfs_psdev_register(&obd_psdev);
 553         if (err) {
 554                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 555                 return err;
 556         }
 557
 558
 559         /* Default the dirty page cache cap to 1/2 of system memory.
 560          * For clients with less memory, a larger fraction is needed
 561          * for other purposes (mostly for BGL). */
 562         if (cfs_num_physpages <= 512 << (20 - CFS_PAGE_SHIFT))
 563                 obd_max_dirty_pages = cfs_num_physpages / 4;
 564         else
 565                 obd_max_dirty_pages = cfs_num_physpages / 2;
 566
 567         err = obd_init_caches();
 568         if (err)
 569                 return err;
 570 #ifdef __KERNEL__
 571         err = class_procfs_init();
 572         if (err)
 573                 return err;
 574 #endif
 575
 576         err = lu_global_init();
 577         if (err)
 578                 return err;
 579
 580 #ifdef __KERNEL__
 581         err = lustre_register_fs();
 582         if (err)
 583                 return err;
 584 #endif
 585         err = obd_hashes_init();
 586         if (err)
 587                 return err;
 588
 589         return err;
 590 }
 591
 592 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 593  * ifdef to the end of the file to cover module and versioning goo.*/
 594 #ifdef __KERNEL__
 595 static void cleanup_obdclass(void)
 596 {
 597         int lustre_unregister_fs(void);
 598         __u64 memory_leaked, pages_leaked;
 599         __u64 memory_max, pages_max;
 600         struct obd_device *obd;
 601         ENTRY;
 602
 603         lustre_unregister_fs();
 604
 605         cfs_psdev_deregister(&obd_psdev);
 606         for (obd_devlist_first(&obd);
 607              obd != NULL;
 608              obd_devlist_next(&obd)) {
 609                 if (obd->obd_set_up &&
 610                     OBT(obd) && OBP(obd, detach)) {
 611                         /* XXX should this call generic detach otherwise? */
 612                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 613                         OBP(obd, detach)(obd);
 614                 }
 615         }
 616         obd_hashes_fini();
 617
 618         lu_global_fini();
 619
 620         obd_cleanup_caches();
 621         obd_sysctl_clean();
 622
 623         class_procfs_clean();
 624
 625         class_handle_cleanup();
 626         class_exit_uuidlist();
 627         obd_zombie_impexp_stop();
 628
 629         memory_leaked = obd_memory_sum();
 630         pages_leaked = obd_pages_sum();
 631
 632         memory_max = obd_memory_max();
 633         pages_max = obd_pages_max();
 634
 635         lprocfs_free_stats(&obd_memory);
 636         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 637                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 638                memory_max, memory_leaked);
 639         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 640                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 641                pages_max, pages_leaked);
 642
 643         EXIT;
 644 }
 645
 646 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 647 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 648 MODULE_LICENSE("GPL");
 649
 650 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 651 #endif