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         char tmp_jobid[LUSTRE_JOBID_SIZE] = { 0 };
 130         int rc = 0;
 131         ENTRY;
 132
 133         /* Jobstats isn't enabled */
 134         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 135                 GOTO(out, rc = 0);
 136
 137         /* Whole node dedicated to single job */
 138         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) {
 139                 memcpy(tmp_jobid, obd_jobid_node, LUSTRE_JOBID_SIZE);
 140                 GOTO(out, rc = 0);
 141         }
 142
 143         /* Use process name + fsuid as jobid */
 144         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 145                 snprintf(tmp_jobid, LUSTRE_JOBID_SIZE, "%s.%u",
 146                          current_comm(),
 147                          from_kuid(&init_user_ns, current_fsuid()));
 148                 GOTO(out, rc = 0);
 149         }
 150
 151         rc = cfs_get_environ(obd_jobid_var, tmp_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
 176 out:
 177         if (rc != 0)
 178                 RETURN(rc);
 179
 180         /* Only replace the job ID if it changed. */
 181         if (strcmp(jobid, tmp_jobid) != 0)
 182                 memcpy(jobid, tmp_jobid, jobid_len);
 183
 184         RETURN(0);
 185 }
 186 EXPORT_SYMBOL(lustre_get_jobid);
 187
 188 static int class_resolve_dev_name(__u32 len, const char *name)
 189 {
 190         int rc;
 191         int dev;
 192
 193         ENTRY;
 194         if (!len || !name) {
 195                 CERROR("No name passed,!\n");
 196                 GOTO(out, rc = -EINVAL);
 197         }
 198         if (name[len - 1] != 0) {
 199                 CERROR("Name not nul terminated!\n");
 200                 GOTO(out, rc = -EINVAL);
 201         }
 202
 203         CDEBUG(D_IOCTL, "device name %s\n", name);
 204         dev = class_name2dev(name);
 205         if (dev == -1) {
 206                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 207                 GOTO(out, rc = -EINVAL);
 208         }
 209
 210         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 211         rc = dev;
 212
 213 out:
 214         RETURN(rc);
 215 }
 216
 217 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 218 {
 219         char *buf = NULL;
 220         struct obd_ioctl_data *data;
 221         struct libcfs_debug_ioctl_data *debug_data;
 222         struct obd_device *obd = NULL;
 223         int err = 0, len = 0;
 224         ENTRY;
 225
 226         /* only for debugging */
 227         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 228                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 229                 libcfs_subsystem_debug = debug_data->subs;
 230                 libcfs_debug = debug_data->debug;
 231                 return 0;
 232         }
 233
 234         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 235         if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
 236                 CERROR("OBD ioctl: data error\n");
 237                 RETURN(-EINVAL);
 238         }
 239         data = (struct obd_ioctl_data *)buf;
 240
 241         switch (cmd) {
 242         case OBD_IOC_PROCESS_CFG: {
 243                 struct lustre_cfg *lcfg;
 244
 245                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 246                         CERROR("No config buffer passed!\n");
 247                         GOTO(out, err = -EINVAL);
 248                 }
 249                 OBD_ALLOC(lcfg, data->ioc_plen1);
 250                 if (lcfg == NULL)
 251                         GOTO(out, err = -ENOMEM);
 252                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 253                                          data->ioc_plen1);
 254                 if (!err)
 255                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 256                 if (!err)
 257                         err = class_process_config(lcfg);
 258
 259                 OBD_FREE(lcfg, data->ioc_plen1);
 260                 GOTO(out, err);
 261         }
 262
 263         case OBD_GET_VERSION:
 264                 if (!data->ioc_inlbuf1) {
 265                         CERROR("No buffer passed in ioctl\n");
 266                         GOTO(out, err = -EINVAL);
 267                 }
 268
 269                 if (strlen(LUSTRE_VERSION_STRING) + 1 > data->ioc_inllen1) {
 270                         CERROR("ioctl buffer too small to hold version\n");
 271                         GOTO(out, err = -EINVAL);
 272                 }
 273
 274                 memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING,
 275                        strlen(LUSTRE_VERSION_STRING) + 1);
 276
 277                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 278                 if (err)
 279                         err = -EFAULT;
 280                 GOTO(out, err);
 281
 282         case OBD_IOC_NAME2DEV: {
 283                 /* Resolve a device name.  This does not change the
 284                  * currently selected device.
 285                  */
 286                 int dev;
 287
 288                 dev = class_resolve_dev_name(data->ioc_inllen1,
 289                                              data->ioc_inlbuf1);
 290                 data->ioc_dev = dev;
 291                 if (dev < 0)
 292                         GOTO(out, err = -EINVAL);
 293
 294                 err = obd_ioctl_popdata((void __user *)arg, data,
 295                                         sizeof(*data));
 296                 if (err)
 297                         err = -EFAULT;
 298                 GOTO(out, err);
 299         }
 300
 301         case OBD_IOC_UUID2DEV: {
 302                 /* Resolve a device uuid.  This does not change the
 303                  * currently selected device.
 304                  */
 305                 int dev;
 306                 struct obd_uuid uuid;
 307
 308                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 309                         CERROR("No UUID passed!\n");
 310                         GOTO(out, err = -EINVAL);
 311                 }
 312                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 313                         CERROR("UUID not NUL terminated!\n");
 314                         GOTO(out, err = -EINVAL);
 315                 }
 316
 317                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 318                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 319                 dev = class_uuid2dev(&uuid);
 320                 data->ioc_dev = dev;
 321                 if (dev == -1) {
 322                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 323                                data->ioc_inlbuf1);
 324                         GOTO(out, err = -EINVAL);
 325                 }
 326
 327                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 328                        dev);
 329                 err = obd_ioctl_popdata((void __user *)arg, data,
 330                                         sizeof(*data));
 331                 if (err)
 332                         err = -EFAULT;
 333                 GOTO(out, err);
 334         }
 335
 336         case OBD_IOC_GETDEVICE: {
 337                 int     index = data->ioc_count;
 338                 char    *status, *str;
 339
 340                 if (!data->ioc_inlbuf1) {
 341                         CERROR("No buffer passed in ioctl\n");
 342                         GOTO(out, err = -EINVAL);
 343                 }
 344                 if (data->ioc_inllen1 < 128) {
 345                         CERROR("ioctl buffer too small to hold version\n");
 346                         GOTO(out, err = -EINVAL);
 347                 }
 348
 349                 obd = class_num2obd(index);
 350                 if (!obd)
 351                         GOTO(out, err = -ENOENT);
 352
 353                 if (obd->obd_stopping)
 354                         status = "ST";
 355                 else if (obd->obd_set_up)
 356                         status = "UP";
 357                 else if (obd->obd_attached)
 358                         status = "AT";
 359                 else
 360                         status = "--";
 361                 str = (char *)data->ioc_bulk;
 362                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 363                          (int)index, status, obd->obd_type->typ_name,
 364                          obd->obd_name, obd->obd_uuid.uuid,
 365                          atomic_read(&obd->obd_refcount));
 366                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 367
 368                 GOTO(out, err = 0);
 369         }
 370
 371         }
 372
 373         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 374                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 375                         GOTO(out, err = -EINVAL);
 376                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 377                         GOTO(out, err = -EINVAL);
 378                 obd = class_name2obd(data->ioc_inlbuf4);
 379         } else if (data->ioc_dev < class_devno_max()) {
 380                 obd = class_num2obd(data->ioc_dev);
 381         } else {
 382                 CERROR("OBD ioctl: No device\n");
 383                 GOTO(out, err = -EINVAL);
 384         }
 385
 386         if (obd == NULL) {
 387                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 388                 GOTO(out, err = -EINVAL);
 389         }
 390         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 391
 392         if (!obd->obd_set_up || obd->obd_stopping) {
 393                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 394                 GOTO(out, err = -EINVAL);
 395         }
 396
 397         switch(cmd) {
 398         case OBD_IOC_NO_TRANSNO: {
 399                 if (!obd->obd_attached) {
 400                         CERROR("Device %d not attached\n", obd->obd_minor);
 401                         GOTO(out, err = -ENODEV);
 402                 }
 403                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 404                        obd->obd_name);
 405                 obd->obd_no_transno = 1;
 406                 GOTO(out, err = 0);
 407         }
 408
 409         default: {
 410                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 411                 if (err)
 412                         GOTO(out, err);
 413
 414                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 415                 if (err)
 416                         err = -EFAULT;
 417                 GOTO(out, err);
 418         }
 419         }
 420
 421  out:
 422         if (buf)
 423                 obd_ioctl_freedata(buf, len);
 424         RETURN(err);
 425 } /* class_handle_ioctl */
 426
 427 #define OBD_INIT_CHECK
 428 #ifdef OBD_INIT_CHECK
 429 static int obd_init_checks(void)
 430 {
 431         __u64 u64val, div64val;
 432         char buf[64];
 433         int len, ret = 0;
 434
 435         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
 436
 437         u64val = OBD_OBJECT_EOF;
 438         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 439         if (u64val != OBD_OBJECT_EOF) {
 440                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 441                        u64val, (int)sizeof(u64val));
 442                 ret = -EINVAL;
 443         }
 444         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 445         if (len != 18) {
 446                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 447                 ret = -EINVAL;
 448         }
 449
 450         div64val = OBD_OBJECT_EOF;
 451         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 452         if (u64val != OBD_OBJECT_EOF) {
 453                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 454                        u64val, (int)sizeof(u64val));
 455                 ret = -EOVERFLOW;
 456         }
 457         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 458                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 459                        u64val, (int)sizeof(u64val));
 460                 return -EOVERFLOW;
 461         }
 462         if (do_div(div64val, 256) != (u64val & 255)) {
 463                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255);
 464                 return -EOVERFLOW;
 465         }
 466         if (u64val >> 8 != div64val) {
 467                 CERROR("do_div(%#llx,256) %llu != %llu\n",
 468                        u64val, div64val, u64val >> 8);
 469                 return -EOVERFLOW;
 470         }
 471         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 472         if (len != 18) {
 473                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 474                 ret = -EINVAL;
 475         }
 476         len = snprintf(buf, sizeof(buf), "%llu", u64val);
 477         if (len != 20) {
 478                 CWARN("u64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 479                 ret = -EINVAL;
 480         }
 481         len = snprintf(buf, sizeof(buf), "%lld", u64val);
 482         if (len != 2) {
 483                 CWARN("s64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 484                 ret = -EINVAL;
 485         }
 486         if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) {
 487                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
 488                       (__u64)PAGE_SIZE);
 489                 ret = -EINVAL;
 490         }
 491
 492         return ret;
 493 }
 494 #else
 495 #define obd_init_checks() do {} while(0)
 496 #endif
 497
 498 static int __init obdclass_init(void)
 499 {
 500         int i, err;
 501
 502         spin_lock_init(&obd_stale_export_lock);
 503         INIT_LIST_HEAD(&obd_stale_exports);
 504         atomic_set(&obd_stale_export_num, 0);
 505
 506         LCONSOLE_INFO("Lustre: Build Version: "LUSTRE_VERSION_STRING"\n");
 507
 508         spin_lock_init(&obd_types_lock);
 509         obd_zombie_impexp_init();
 510 #ifdef CONFIG_PROC_FS
 511         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 512                                          LPROCFS_STATS_FLAG_NONE |
 513                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 514         if (obd_memory == NULL) {
 515                 CERROR("kmalloc of 'obd_memory' failed\n");
 516                 RETURN(-ENOMEM);
 517         }
 518
 519         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 520                              LPROCFS_CNTR_AVGMINMAX,
 521                              "memused", "bytes");
 522 #endif
 523         err = obd_init_checks();
 524         if (err == -EOVERFLOW)
 525                 return err;
 526
 527         class_init_uuidlist();
 528         err = class_handle_init();
 529         if (err)
 530                 return err;
 531
 532         INIT_LIST_HEAD(&obd_types);
 533
 534         err = misc_register(&obd_psdev);
 535         if (err) {
 536                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 537                 return err;
 538         }
 539
 540         /* This struct is already zeroed for us (static global) */
 541         for (i = 0; i < class_devno_max(); i++)
 542                 obd_devs[i] = NULL;
 543
 544         /* Default the dirty page cache cap to 1/2 of system memory.
 545          * For clients with less memory, a larger fraction is needed
 546          * for other purposes (mostly for BGL). */
 547         if (totalram_pages <= 512 << (20 - PAGE_SHIFT))
 548                 obd_max_dirty_pages = totalram_pages / 4;
 549         else
 550                 obd_max_dirty_pages = totalram_pages / 2;
 551
 552         err = obd_init_caches();
 553         if (err)
 554                 return err;
 555         err = class_procfs_init();
 556         if (err)
 557                 return err;
 558
 559         err = lu_global_init();
 560         if (err)
 561                 return err;
 562
 563         err = cl_global_init();
 564         if (err != 0)
 565                 return err;
 566
 567 #ifdef HAVE_SERVER_SUPPORT
 568         err = dt_global_init();
 569         if (err != 0)
 570                 return err;
 571
 572         err = lu_ucred_global_init();
 573         if (err != 0)
 574                 return err;
 575 #endif /* HAVE_SERVER_SUPPORT */
 576
 577         err = llog_info_init();
 578         if (err)
 579                 return err;
 580
 581         err = lustre_register_fs();
 582
 583         return err;
 584 }
 585
 586 void obd_update_maxusage(void)
 587 {
 588         __u64 max;
 589
 590         max = obd_memory_sum();
 591
 592         spin_lock(&obd_updatemax_lock);
 593         if (max > obd_max_alloc)
 594                 obd_max_alloc = max;
 595         spin_unlock(&obd_updatemax_lock);
 596 }
 597 EXPORT_SYMBOL(obd_update_maxusage);
 598
 599 #ifdef CONFIG_PROC_FS
 600 __u64 obd_memory_max(void)
 601 {
 602         __u64 ret;
 603
 604         obd_update_maxusage();
 605         spin_lock(&obd_updatemax_lock);
 606         ret = obd_max_alloc;
 607         spin_unlock(&obd_updatemax_lock);
 608
 609         return ret;
 610 }
 611 #endif /* CONFIG_PROC_FS */
 612
 613 static void __exit obdclass_exit(void)
 614 {
 615         __u64 memory_leaked;
 616         __u64 memory_max;
 617         ENTRY;
 618
 619         lustre_unregister_fs();
 620
 621         misc_deregister(&obd_psdev);
 622         llog_info_fini();
 623 #ifdef HAVE_SERVER_SUPPORT
 624         lu_ucred_global_fini();
 625         dt_global_fini();
 626 #endif /* HAVE_SERVER_SUPPORT */
 627         cl_global_fini();
 628         lu_global_fini();
 629
 630         obd_cleanup_caches();
 631         obd_sysctl_clean();
 632
 633         class_procfs_clean();
 634
 635         class_handle_cleanup();
 636         class_exit_uuidlist();
 637         obd_zombie_impexp_stop();
 638         LASSERT(list_empty(&obd_stale_exports));
 639
 640         memory_leaked = obd_memory_sum();
 641
 642         memory_max = obd_memory_max();
 643
 644         lprocfs_free_stats(&obd_memory);
 645         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 646                "obd_memory max: %llu, leaked: %llu\n",
 647                memory_max, memory_leaked);
 648
 649         EXIT;
 650 }
 651
 652 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 653 MODULE_DESCRIPTION("Lustre Class Driver");
 654 MODULE_VERSION(LUSTRE_VERSION_STRING);
 655 MODULE_LICENSE("GPL");
 656
 657 module_init(obdclass_init);
 658 module_exit(obdclass_exit);