lustre/obdclass/class_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2015, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_CLASS
  34
  35 #include <linux/user_namespace.h>
  36 #ifdef HAVE_UIDGID_HEADER
  37 # include <linux/uidgid.h>
  38 #endif
  39 #include <linux/atomic.h>
  40 #include <linux/list.h>
  41
  42 #include <obd_support.h>
  43 #include <obd_class.h>
  44 #include <lnet/lnetctl.h>
  45 #include <lustre_debug.h>
  46 #include <lprocfs_status.h>
  47 #include <lustre_ver.h>
  48 #include <cl_object.h>
  49 #ifdef HAVE_SERVER_SUPPORT
  50 # include <dt_object.h>
  51 # include <md_object.h>
  52 #endif /* HAVE_SERVER_SUPPORT */
  53 #include <lustre_ioctl.h>
  54 #include "llog_internal.h"
  55
  56 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  57 struct list_head obd_types;
  58 DEFINE_RWLOCK(obd_dev_lock);
  59
  60 #ifdef CONFIG_PROC_FS
  61 static __u64 obd_max_alloc;
  62 #else
  63 __u64 obd_max_alloc;
  64 #endif
  65
  66 static DEFINE_SPINLOCK(obd_updatemax_lock);
  67
  68 /* The following are visible and mutable through /proc/sys/lustre/. */
  69 unsigned int obd_debug_peer_on_timeout;
  70 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  71 unsigned int obd_dump_on_timeout;
  72 EXPORT_SYMBOL(obd_dump_on_timeout);
  73 unsigned int obd_dump_on_eviction;
  74 EXPORT_SYMBOL(obd_dump_on_eviction);
  75 unsigned long obd_max_dirty_pages;
  76 EXPORT_SYMBOL(obd_max_dirty_pages);
  77 atomic_long_t obd_dirty_pages;
  78 EXPORT_SYMBOL(obd_dirty_pages);
  79 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  80 EXPORT_SYMBOL(obd_timeout);
  81 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  82 EXPORT_SYMBOL(ldlm_timeout);
  83 unsigned int obd_timeout_set;
  84 EXPORT_SYMBOL(obd_timeout_set);
  85 unsigned int ldlm_timeout_set;
  86 EXPORT_SYMBOL(ldlm_timeout_set);
  87 /* bulk transfer timeout, give up after 100s by default */
  88 unsigned int bulk_timeout = 100; /* seconds */
  89 EXPORT_SYMBOL(bulk_timeout);
  90 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  91 unsigned int at_min = 0;
  92 EXPORT_SYMBOL(at_min);
  93 unsigned int at_max = 600;
  94 EXPORT_SYMBOL(at_max);
  95 unsigned int at_history = 600;
  96 EXPORT_SYMBOL(at_history);
  97 int at_early_margin = 5;
  98 EXPORT_SYMBOL(at_early_margin);
  99 int at_extra = 30;
 100 EXPORT_SYMBOL(at_extra);
 101
 102 atomic_long_t obd_dirty_transit_pages;
 103 EXPORT_SYMBOL(obd_dirty_transit_pages);
 104
 105 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 106
 107 #ifdef CONFIG_PROC_FS
 108 struct lprocfs_stats *obd_memory = NULL;
 109 EXPORT_SYMBOL(obd_memory);
 110 #endif
 111
 112 char obd_jobid_node[LUSTRE_JOBID_SIZE + 1];
 113
 114 /* Get jobid of current process by reading the environment variable
 115  * stored in between the "env_start" & "env_end" of task struct.
 116  *
 117  * TODO:
 118  * It's better to cache the jobid for later use if there is any
 119  * efficient way, the cl_env code probably could be reused for this
 120  * purpose.
 121  *
 122  * If some job scheduler doesn't store jobid in the "env_start/end",
 123  * then an upcall could be issued here to get the jobid by utilizing
 124  * the userspace tools/api. Then, the jobid must be cached.
 125  */
 126 int lustre_get_jobid(char *jobid)
 127 {
 128         int jobid_len = LUSTRE_JOBID_SIZE;
 129         int rc = 0;
 130         ENTRY;
 131
 132         memset(jobid, 0, LUSTRE_JOBID_SIZE);
 133         /* Jobstats isn't enabled */
 134         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 135                 RETURN(0);
 136
 137         /* Whole node dedicated to single job */
 138         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) {
 139                 memcpy(jobid, obd_jobid_node, LUSTRE_JOBID_SIZE);
 140                 RETURN(0);
 141         }
 142
 143         /* Use process name + fsuid as jobid */
 144         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 145                 snprintf(jobid, LUSTRE_JOBID_SIZE, "%s.%u",
 146                          current_comm(),
 147                          from_kuid(&init_user_ns, current_fsuid()));
 148                 RETURN(0);
 149         }
 150
 151         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 152         if (rc) {
 153                 if (rc == -EOVERFLOW) {
 154                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 155                          * variable length strings instead of just numbers), it
 156                          * might make sense to keep the unique parts for JobID,
 157                          * instead of just returning an error.  That means a
 158                          * larger temp buffer for cfs_get_environ(), then
 159                          * truncating the string at some separator to fit into
 160                          * the specified jobid_len.  Fix later if needed. */
 161                         static bool printed;
 162                         if (unlikely(!printed)) {
 163                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 164                                                    "for JobID buffer (%d)\n",
 165                                                    obd_jobid_var, jobid_len);
 166                                 printed = true;
 167                         }
 168                 } else {
 169                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 170                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 171                                "Get jobid for (%s) failed: rc = %d\n",
 172                                obd_jobid_var, rc);
 173                 }
 174         }
 175         RETURN(rc);
 176 }
 177 EXPORT_SYMBOL(lustre_get_jobid);
 178
 179 static int class_resolve_dev_name(__u32 len, const char *name)
 180 {
 181         int rc;
 182         int dev;
 183
 184         ENTRY;
 185         if (!len || !name) {
 186                 CERROR("No name passed,!\n");
 187                 GOTO(out, rc = -EINVAL);
 188         }
 189         if (name[len - 1] != 0) {
 190                 CERROR("Name not nul terminated!\n");
 191                 GOTO(out, rc = -EINVAL);
 192         }
 193
 194         CDEBUG(D_IOCTL, "device name %s\n", name);
 195         dev = class_name2dev(name);
 196         if (dev == -1) {
 197                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 198                 GOTO(out, rc = -EINVAL);
 199         }
 200
 201         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 202         rc = dev;
 203
 204 out:
 205         RETURN(rc);
 206 }
 207
 208 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 209 {
 210         char *buf = NULL;
 211         struct obd_ioctl_data *data;
 212         struct libcfs_debug_ioctl_data *debug_data;
 213         struct obd_device *obd = NULL;
 214         int err = 0, len = 0;
 215         ENTRY;
 216
 217         /* only for debugging */
 218         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 219                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 220                 libcfs_subsystem_debug = debug_data->subs;
 221                 libcfs_debug = debug_data->debug;
 222                 return 0;
 223         }
 224
 225         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 226         if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
 227                 CERROR("OBD ioctl: data error\n");
 228                 RETURN(-EINVAL);
 229         }
 230         data = (struct obd_ioctl_data *)buf;
 231
 232         switch (cmd) {
 233         case OBD_IOC_PROCESS_CFG: {
 234                 struct lustre_cfg *lcfg;
 235
 236                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 237                         CERROR("No config buffer passed!\n");
 238                         GOTO(out, err = -EINVAL);
 239                 }
 240                 OBD_ALLOC(lcfg, data->ioc_plen1);
 241                 if (lcfg == NULL)
 242                         GOTO(out, err = -ENOMEM);
 243                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 244                                          data->ioc_plen1);
 245                 if (!err)
 246                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 247                 if (!err)
 248                         err = class_process_config(lcfg);
 249
 250                 OBD_FREE(lcfg, data->ioc_plen1);
 251                 GOTO(out, err);
 252         }
 253
 254         case OBD_GET_VERSION:
 255                 if (!data->ioc_inlbuf1) {
 256                         CERROR("No buffer passed in ioctl\n");
 257                         GOTO(out, err = -EINVAL);
 258                 }
 259
 260                 if (strlen(LUSTRE_VERSION_STRING) + 1 > data->ioc_inllen1) {
 261                         CERROR("ioctl buffer too small to hold version\n");
 262                         GOTO(out, err = -EINVAL);
 263                 }
 264
 265                 memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING,
 266                        strlen(LUSTRE_VERSION_STRING) + 1);
 267
 268                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 269                 if (err)
 270                         err = -EFAULT;
 271                 GOTO(out, err);
 272
 273         case OBD_IOC_NAME2DEV: {
 274                 /* Resolve a device name.  This does not change the
 275                  * currently selected device.
 276                  */
 277                 int dev;
 278
 279                 dev = class_resolve_dev_name(data->ioc_inllen1,
 280                                              data->ioc_inlbuf1);
 281                 data->ioc_dev = dev;
 282                 if (dev < 0)
 283                         GOTO(out, err = -EINVAL);
 284
 285                 err = obd_ioctl_popdata((void __user *)arg, data,
 286                                         sizeof(*data));
 287                 if (err)
 288                         err = -EFAULT;
 289                 GOTO(out, err);
 290         }
 291
 292         case OBD_IOC_UUID2DEV: {
 293                 /* Resolve a device uuid.  This does not change the
 294                  * currently selected device.
 295                  */
 296                 int dev;
 297                 struct obd_uuid uuid;
 298
 299                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 300                         CERROR("No UUID passed!\n");
 301                         GOTO(out, err = -EINVAL);
 302                 }
 303                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 304                         CERROR("UUID not NUL terminated!\n");
 305                         GOTO(out, err = -EINVAL);
 306                 }
 307
 308                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 309                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 310                 dev = class_uuid2dev(&uuid);
 311                 data->ioc_dev = dev;
 312                 if (dev == -1) {
 313                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 314                                data->ioc_inlbuf1);
 315                         GOTO(out, err = -EINVAL);
 316                 }
 317
 318                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 319                        dev);
 320                 err = obd_ioctl_popdata((void __user *)arg, data,
 321                                         sizeof(*data));
 322                 if (err)
 323                         err = -EFAULT;
 324                 GOTO(out, err);
 325         }
 326
 327         case OBD_IOC_GETDEVICE: {
 328                 int     index = data->ioc_count;
 329                 char    *status, *str;
 330
 331                 if (!data->ioc_inlbuf1) {
 332                         CERROR("No buffer passed in ioctl\n");
 333                         GOTO(out, err = -EINVAL);
 334                 }
 335                 if (data->ioc_inllen1 < 128) {
 336                         CERROR("ioctl buffer too small to hold version\n");
 337                         GOTO(out, err = -EINVAL);
 338                 }
 339
 340                 obd = class_num2obd(index);
 341                 if (!obd)
 342                         GOTO(out, err = -ENOENT);
 343
 344                 if (obd->obd_stopping)
 345                         status = "ST";
 346                 else if (obd->obd_set_up)
 347                         status = "UP";
 348                 else if (obd->obd_attached)
 349                         status = "AT";
 350                 else
 351                         status = "--";
 352                 str = (char *)data->ioc_bulk;
 353                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 354                          (int)index, status, obd->obd_type->typ_name,
 355                          obd->obd_name, obd->obd_uuid.uuid,
 356                          atomic_read(&obd->obd_refcount));
 357                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 358
 359                 GOTO(out, err = 0);
 360         }
 361
 362         }
 363
 364         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 365                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 366                         GOTO(out, err = -EINVAL);
 367                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 368                         GOTO(out, err = -EINVAL);
 369                 obd = class_name2obd(data->ioc_inlbuf4);
 370         } else if (data->ioc_dev < class_devno_max()) {
 371                 obd = class_num2obd(data->ioc_dev);
 372         } else {
 373                 CERROR("OBD ioctl: No device\n");
 374                 GOTO(out, err = -EINVAL);
 375         }
 376
 377         if (obd == NULL) {
 378                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 379                 GOTO(out, err = -EINVAL);
 380         }
 381         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 382
 383         if (!obd->obd_set_up || obd->obd_stopping) {
 384                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 385                 GOTO(out, err = -EINVAL);
 386         }
 387
 388         switch(cmd) {
 389         case OBD_IOC_NO_TRANSNO: {
 390                 if (!obd->obd_attached) {
 391                         CERROR("Device %d not attached\n", obd->obd_minor);
 392                         GOTO(out, err = -ENODEV);
 393                 }
 394                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 395                        obd->obd_name);
 396                 obd->obd_no_transno = 1;
 397                 GOTO(out, err = 0);
 398         }
 399
 400         default: {
 401                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 402                 if (err)
 403                         GOTO(out, err);
 404
 405                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 406                 if (err)
 407                         err = -EFAULT;
 408                 GOTO(out, err);
 409         }
 410         }
 411
 412  out:
 413         if (buf)
 414                 obd_ioctl_freedata(buf, len);
 415         RETURN(err);
 416 } /* class_handle_ioctl */
 417
 418 #define OBD_INIT_CHECK
 419 #ifdef OBD_INIT_CHECK
 420 static int obd_init_checks(void)
 421 {
 422         __u64 u64val, div64val;
 423         char buf[64];
 424         int len, ret = 0;
 425
 426         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
 427
 428         u64val = OBD_OBJECT_EOF;
 429         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 430         if (u64val != OBD_OBJECT_EOF) {
 431                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 432                        u64val, (int)sizeof(u64val));
 433                 ret = -EINVAL;
 434         }
 435         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 436         if (len != 18) {
 437                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 438                 ret = -EINVAL;
 439         }
 440
 441         div64val = OBD_OBJECT_EOF;
 442         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 443         if (u64val != OBD_OBJECT_EOF) {
 444                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 445                        u64val, (int)sizeof(u64val));
 446                 ret = -EOVERFLOW;
 447         }
 448         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 449                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 450                        u64val, (int)sizeof(u64val));
 451                 return -EOVERFLOW;
 452         }
 453         if (do_div(div64val, 256) != (u64val & 255)) {
 454                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255);
 455                 return -EOVERFLOW;
 456         }
 457         if (u64val >> 8 != div64val) {
 458                 CERROR("do_div(%#llx,256) %llu != %llu\n",
 459                        u64val, div64val, u64val >> 8);
 460                 return -EOVERFLOW;
 461         }
 462         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 463         if (len != 18) {
 464                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 465                 ret = -EINVAL;
 466         }
 467         len = snprintf(buf, sizeof(buf), "%llu", u64val);
 468         if (len != 20) {
 469                 CWARN("u64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 470                 ret = -EINVAL;
 471         }
 472         len = snprintf(buf, sizeof(buf), "%lld", u64val);
 473         if (len != 2) {
 474                 CWARN("s64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 475                 ret = -EINVAL;
 476         }
 477         if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) {
 478                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
 479                       (__u64)PAGE_SIZE);
 480                 ret = -EINVAL;
 481         }
 482
 483         return ret;
 484 }
 485 #else
 486 #define obd_init_checks() do {} while(0)
 487 #endif
 488
 489 static int __init obdclass_init(void)
 490 {
 491         int i, err;
 492
 493         spin_lock_init(&obd_stale_export_lock);
 494         INIT_LIST_HEAD(&obd_stale_exports);
 495         atomic_set(&obd_stale_export_num, 0);
 496
 497         LCONSOLE_INFO("Lustre: Build Version: "LUSTRE_VERSION_STRING"\n");
 498
 499         spin_lock_init(&obd_types_lock);
 500         obd_zombie_impexp_init();
 501 #ifdef CONFIG_PROC_FS
 502         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 503                                          LPROCFS_STATS_FLAG_NONE |
 504                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 505         if (obd_memory == NULL) {
 506                 CERROR("kmalloc of 'obd_memory' failed\n");
 507                 RETURN(-ENOMEM);
 508         }
 509
 510         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 511                              LPROCFS_CNTR_AVGMINMAX,
 512                              "memused", "bytes");
 513 #endif
 514         err = obd_init_checks();
 515         if (err == -EOVERFLOW)
 516                 return err;
 517
 518         class_init_uuidlist();
 519         err = class_handle_init();
 520         if (err)
 521                 return err;
 522
 523         INIT_LIST_HEAD(&obd_types);
 524
 525         err = misc_register(&obd_psdev);
 526         if (err) {
 527                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 528                 return err;
 529         }
 530
 531         /* This struct is already zeroed for us (static global) */
 532         for (i = 0; i < class_devno_max(); i++)
 533                 obd_devs[i] = NULL;
 534
 535         /* Default the dirty page cache cap to 1/2 of system memory.
 536          * For clients with less memory, a larger fraction is needed
 537          * for other purposes (mostly for BGL). */
 538         if (totalram_pages <= 512 << (20 - PAGE_SHIFT))
 539                 obd_max_dirty_pages = totalram_pages / 4;
 540         else
 541                 obd_max_dirty_pages = totalram_pages / 2;
 542
 543         err = obd_init_caches();
 544         if (err)
 545                 return err;
 546         err = class_procfs_init();
 547         if (err)
 548                 return err;
 549
 550         err = lu_global_init();
 551         if (err)
 552                 return err;
 553
 554         err = cl_global_init();
 555         if (err != 0)
 556                 return err;
 557
 558 #ifdef HAVE_SERVER_SUPPORT
 559         err = dt_global_init();
 560         if (err != 0)
 561                 return err;
 562
 563         err = lu_ucred_global_init();
 564         if (err != 0)
 565                 return err;
 566 #endif /* HAVE_SERVER_SUPPORT */
 567
 568         err = llog_info_init();
 569         if (err)
 570                 return err;
 571
 572         err = lustre_register_fs();
 573
 574         return err;
 575 }
 576
 577 void obd_update_maxusage(void)
 578 {
 579         __u64 max;
 580
 581         max = obd_memory_sum();
 582
 583         spin_lock(&obd_updatemax_lock);
 584         if (max > obd_max_alloc)
 585                 obd_max_alloc = max;
 586         spin_unlock(&obd_updatemax_lock);
 587 }
 588 EXPORT_SYMBOL(obd_update_maxusage);
 589
 590 #ifdef CONFIG_PROC_FS
 591 __u64 obd_memory_max(void)
 592 {
 593         __u64 ret;
 594
 595         obd_update_maxusage();
 596         spin_lock(&obd_updatemax_lock);
 597         ret = obd_max_alloc;
 598         spin_unlock(&obd_updatemax_lock);
 599
 600         return ret;
 601 }
 602 #endif /* CONFIG_PROC_FS */
 603
 604 static void __exit obdclass_exit(void)
 605 {
 606         __u64 memory_leaked;
 607         __u64 memory_max;
 608         ENTRY;
 609
 610         lustre_unregister_fs();
 611
 612         misc_deregister(&obd_psdev);
 613         llog_info_fini();
 614 #ifdef HAVE_SERVER_SUPPORT
 615         lu_ucred_global_fini();
 616         dt_global_fini();
 617 #endif /* HAVE_SERVER_SUPPORT */
 618         cl_global_fini();
 619         lu_global_fini();
 620
 621         obd_cleanup_caches();
 622         obd_sysctl_clean();
 623
 624         class_procfs_clean();
 625
 626         class_handle_cleanup();
 627         class_exit_uuidlist();
 628         obd_zombie_impexp_stop();
 629         LASSERT(list_empty(&obd_stale_exports));
 630
 631         memory_leaked = obd_memory_sum();
 632
 633         memory_max = obd_memory_max();
 634
 635         lprocfs_free_stats(&obd_memory);
 636         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 637                "obd_memory max: %llu, leaked: %llu\n",
 638                memory_max, memory_leaked);
 639
 640         EXIT;
 641 }
 642
 643 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 644 MODULE_DESCRIPTION("Lustre Class Driver");
 645 MODULE_VERSION(LUSTRE_VERSION_STRING);
 646 MODULE_LICENSE("GPL");
 647
 648 module_init(obdclass_init);
 649 module_exit(obdclass_exit);