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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  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 __KERNEL__
  39 # include <liblustre.h>
  40 #else
  41 # include <asm/atomic.h>
  42 #endif
  43
  44 #include <obd_support.h>
  45 #include <obd_class.h>
  46 #include <lnet/lnetctl.h>
  47 #include <lustre_debug.h>
  48 #include <lprocfs_status.h>
  49 #include <lustre/lustre_build_version.h>
  50 #include <libcfs/list.h>
  51 #include "llog_internal.h"
  52
  53 #ifndef __KERNEL__
  54 /* liblustre workaround */
  55 cfs_atomic_t libcfs_kmemory = {0};
  56 #endif
  57
  58 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  59 EXPORT_SYMBOL(obd_devs);
  60 cfs_list_t obd_types;
  61 DEFINE_RWLOCK(obd_dev_lock);
  62
  63 #ifndef __KERNEL__
  64 __u64 obd_max_pages = 0;
  65 __u64 obd_max_alloc = 0;
  66 __u64 obd_alloc;
  67 __u64 obd_pages;
  68 #endif
  69
  70 /* The following are visible and mutable through /proc/sys/lustre/. */
  71 unsigned int obd_debug_peer_on_timeout;
  72 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  73 unsigned int obd_dump_on_timeout;
  74 EXPORT_SYMBOL(obd_dump_on_timeout);
  75 unsigned int obd_dump_on_eviction;
  76 EXPORT_SYMBOL(obd_dump_on_eviction);
  77 unsigned int obd_max_dirty_pages = 256;
  78 EXPORT_SYMBOL(obd_max_dirty_pages);
  79 cfs_atomic_t obd_dirty_pages;
  80 EXPORT_SYMBOL(obd_dirty_pages);
  81 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  82 EXPORT_SYMBOL(obd_timeout);
  83 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  84 EXPORT_SYMBOL(ldlm_timeout);
  85 unsigned int obd_timeout_set;
  86 EXPORT_SYMBOL(obd_timeout_set);
  87 unsigned int ldlm_timeout_set;
  88 EXPORT_SYMBOL(ldlm_timeout_set);
  89 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  90 unsigned int at_min = 0;
  91 EXPORT_SYMBOL(at_min);
  92 unsigned int at_max = 600;
  93 EXPORT_SYMBOL(at_max);
  94 unsigned int at_history = 600;
  95 EXPORT_SYMBOL(at_history);
  96 int at_early_margin = 5;
  97 EXPORT_SYMBOL(at_early_margin);
  98 int at_extra = 30;
  99 EXPORT_SYMBOL(at_extra);
 100
 101 cfs_atomic_t obd_dirty_transit_pages;
 102 EXPORT_SYMBOL(obd_dirty_transit_pages);
 103
 104 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 105 EXPORT_SYMBOL(obd_jobid_var);
 106
 107 /* Get jobid of current process by reading the environment variable
 108  * stored in between the "env_start" & "env_end" of task struct.
 109  *
 110  * TODO:
 111  * It's better to cache the jobid for later use if there is any
 112  * efficient way, the cl_env code probably could be reused for this
 113  * purpose.
 114  *
 115  * If some job scheduler doesn't store jobid in the "env_start/end",
 116  * then an upcall could be issued here to get the jobid by utilizing
 117  * the userspace tools/api. Then, the jobid must be cached.
 118  */
 119 int lustre_get_jobid(char *jobid)
 120 {
 121         int jobid_len = JOBSTATS_JOBID_SIZE;
 122         int rc = 0;
 123         ENTRY;
 124
 125         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 126         /* Jobstats isn't enabled */
 127         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 128                 RETURN(0);
 129
 130         /* Use process name + fsuid as jobid */
 131         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 132                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 133                          cfs_curproc_comm(), cfs_curproc_fsuid());
 134                 RETURN(0);
 135         }
 136
 137         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 138         if (rc) {
 139                 if (rc == -EOVERFLOW) {
 140                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 141                          * variable length strings instead of just numbers), it
 142                          * might make sense to keep the unique parts for JobID,
 143                          * instead of just returning an error.  That means a
 144                          * larger temp buffer for cfs_get_environ(), then
 145                          * truncating the string at some separator to fit into
 146                          * the specified jobid_len.  Fix later if needed. */
 147                         static bool printed;
 148                         if (unlikely(!printed)) {
 149                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 150                                                    "for JobID buffer (%d)\n",
 151                                                    obd_jobid_var, jobid_len);
 152                                 printed = true;
 153                         }
 154                 } else {
 155                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 156                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 157                                "Get jobid for (%s) failed: rc = %d\n",
 158                                obd_jobid_var, rc);
 159                 }
 160         }
 161         RETURN(rc);
 162 }
 163 EXPORT_SYMBOL(lustre_get_jobid);
 164
 165 static inline void obd_data2conn(struct lustre_handle *conn,
 166                                  struct obd_ioctl_data *data)
 167 {
 168         memset(conn, 0, sizeof *conn);
 169         conn->cookie = data->ioc_cookie;
 170 }
 171
 172 static inline void obd_conn2data(struct obd_ioctl_data *data,
 173                                  struct lustre_handle *conn)
 174 {
 175         data->ioc_cookie = conn->cookie;
 176 }
 177
 178 int class_resolve_dev_name(__u32 len, const char *name)
 179 {
 180         int rc;
 181         int dev;
 182
 183         ENTRY;
 184         if (!len || !name) {
 185                 CERROR("No name passed,!\n");
 186                 GOTO(out, rc = -EINVAL);
 187         }
 188         if (name[len - 1] != 0) {
 189                 CERROR("Name not nul terminated!\n");
 190                 GOTO(out, rc = -EINVAL);
 191         }
 192
 193         CDEBUG(D_IOCTL, "device name %s\n", name);
 194         dev = class_name2dev(name);
 195         if (dev == -1) {
 196                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 197                 GOTO(out, rc = -EINVAL);
 198         }
 199
 200         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 201         rc = dev;
 202
 203 out:
 204         RETURN(rc);
 205 }
 206
 207 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 208 {
 209         char *buf = NULL;
 210         struct obd_ioctl_data *data;
 211         struct libcfs_debug_ioctl_data *debug_data;
 212         struct obd_device *obd = NULL;
 213         int err = 0, len = 0;
 214         ENTRY;
 215
 216         /* only for debugging */
 217         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 218                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 219                 libcfs_subsystem_debug = debug_data->subs;
 220                 libcfs_debug = debug_data->debug;
 221                 return 0;
 222         }
 223
 224         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 225         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 226                 CERROR("OBD ioctl: data error\n");
 227                 RETURN(-EINVAL);
 228         }
 229         data = (struct obd_ioctl_data *)buf;
 230
 231         switch (cmd) {
 232         case OBD_IOC_PROCESS_CFG: {
 233                 struct lustre_cfg *lcfg;
 234
 235                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 236                         CERROR("No config buffer passed!\n");
 237                         GOTO(out, err = -EINVAL);
 238                 }
 239                 OBD_ALLOC(lcfg, data->ioc_plen1);
 240                 if (lcfg == NULL)
 241                         GOTO(out, err = -ENOMEM);
 242                 err = cfs_copy_from_user(lcfg, data->ioc_pbuf1,
 243                                          data->ioc_plen1);
 244                 if (!err)
 245                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 246                 if (!err)
 247                         err = class_process_config(lcfg);
 248
 249                 OBD_FREE(lcfg, data->ioc_plen1);
 250                 GOTO(out, err);
 251         }
 252
 253         case OBD_GET_VERSION:
 254                 if (!data->ioc_inlbuf1) {
 255                         CERROR("No buffer passed in ioctl\n");
 256                         GOTO(out, err = -EINVAL);
 257                 }
 258
 259                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 260                         CERROR("ioctl buffer too small to hold version\n");
 261                         GOTO(out, err = -EINVAL);
 262                 }
 263
 264                 memcpy(data->ioc_bulk, BUILD_VERSION,
 265                        strlen(BUILD_VERSION) + 1);
 266
 267                 err = obd_ioctl_popdata((void *)arg, data, len);
 268                 if (err)
 269                         err = -EFAULT;
 270                 GOTO(out, err);
 271
 272         case OBD_IOC_NAME2DEV: {
 273                 /* Resolve a device name.  This does not change the
 274                  * currently selected device.
 275                  */
 276                 int dev;
 277
 278                 dev = class_resolve_dev_name(data->ioc_inllen1,
 279                                              data->ioc_inlbuf1);
 280                 data->ioc_dev = dev;
 281                 if (dev < 0)
 282                         GOTO(out, err = -EINVAL);
 283
 284                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 285                 if (err)
 286                         err = -EFAULT;
 287                 GOTO(out, err);
 288         }
 289
 290         case OBD_IOC_UUID2DEV: {
 291                 /* Resolve a device uuid.  This does not change the
 292                  * currently selected device.
 293                  */
 294                 int dev;
 295                 struct obd_uuid uuid;
 296
 297                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 298                         CERROR("No UUID passed!\n");
 299                         GOTO(out, err = -EINVAL);
 300                 }
 301                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 302                         CERROR("UUID not NUL terminated!\n");
 303                         GOTO(out, err = -EINVAL);
 304                 }
 305
 306                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 307                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 308                 dev = class_uuid2dev(&uuid);
 309                 data->ioc_dev = dev;
 310                 if (dev == -1) {
 311                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 312                                data->ioc_inlbuf1);
 313                         GOTO(out, err = -EINVAL);
 314                 }
 315
 316                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 317                        dev);
 318                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 319                 if (err)
 320                         err = -EFAULT;
 321                 GOTO(out, err);
 322         }
 323
 324         case OBD_IOC_CLOSE_UUID: {
 325                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 326                        data->ioc_inlbuf1);
 327                 GOTO(out, err = 0);
 328         }
 329
 330         case OBD_IOC_GETDEVICE: {
 331                 int     index = data->ioc_count;
 332                 char    *status, *str;
 333
 334                 if (!data->ioc_inlbuf1) {
 335                         CERROR("No buffer passed in ioctl\n");
 336                         GOTO(out, err = -EINVAL);
 337                 }
 338                 if (data->ioc_inllen1 < 128) {
 339                         CERROR("ioctl buffer too small to hold version\n");
 340                         GOTO(out, err = -EINVAL);
 341                 }
 342
 343                 obd = class_num2obd(index);
 344                 if (!obd)
 345                         GOTO(out, err = -ENOENT);
 346
 347                 if (obd->obd_stopping)
 348                         status = "ST";
 349                 else if (obd->obd_set_up)
 350                         status = "UP";
 351                 else if (obd->obd_attached)
 352                         status = "AT";
 353                 else
 354                         status = "--";
 355                 str = (char *)data->ioc_bulk;
 356                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 357                          (int)index, status, obd->obd_type->typ_name,
 358                          obd->obd_name, obd->obd_uuid.uuid,
 359                          cfs_atomic_read(&obd->obd_refcount));
 360                 err = obd_ioctl_popdata((void *)arg, data, len);
 361
 362                 GOTO(out, err = 0);
 363         }
 364
 365         }
 366
 367         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 368                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 369                         GOTO(out, err = -EINVAL);
 370                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 371                         GOTO(out, err = -EINVAL);
 372                 obd = class_name2obd(data->ioc_inlbuf4);
 373         } else if (data->ioc_dev < class_devno_max()) {
 374                 obd = class_num2obd(data->ioc_dev);
 375         } else {
 376                 CERROR("OBD ioctl: No device\n");
 377                 GOTO(out, err = -EINVAL);
 378         }
 379
 380         if (obd == NULL) {
 381                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 382                 GOTO(out, err = -EINVAL);
 383         }
 384         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 385
 386         if (!obd->obd_set_up || obd->obd_stopping) {
 387                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 388                 GOTO(out, err = -EINVAL);
 389         }
 390
 391         switch(cmd) {
 392         case OBD_IOC_NO_TRANSNO: {
 393                 if (!obd->obd_attached) {
 394                         CERROR("Device %d not attached\n", obd->obd_minor);
 395                         GOTO(out, err = -ENODEV);
 396                 }
 397                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 398                        obd->obd_name);
 399                 obd->obd_no_transno = 1;
 400                 GOTO(out, err = 0);
 401         }
 402
 403         default: {
 404                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 405                 if (err)
 406                         GOTO(out, err);
 407
 408                 err = obd_ioctl_popdata((void *)arg, data, len);
 409                 if (err)
 410                         err = -EFAULT;
 411                 GOTO(out, err);
 412         }
 413         }
 414
 415  out:
 416         if (buf)
 417                 obd_ioctl_freedata(buf, len);
 418         RETURN(err);
 419 } /* class_handle_ioctl */
 420
 421 #ifdef __KERNEL__
 422 extern cfs_psdev_t obd_psdev;
 423 #else
 424 void *obd_psdev = NULL;
 425 #endif
 426
 427 #define OBD_INIT_CHECK
 428 #ifdef OBD_INIT_CHECK
 429 int obd_init_checks(void)
 430 {
 431         __u64 u64val, div64val;
 432         char buf[64];
 433         int len, ret = 0;
 434
 435         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 436
 437         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 438
 439         u64val = OBD_OBJECT_EOF;
 440         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 441         if (u64val != OBD_OBJECT_EOF) {
 442                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 443                        u64val, (int)sizeof(u64val));
 444                 ret = -EINVAL;
 445         }
 446         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 447         if (len != 18) {
 448                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 449                 ret = -EINVAL;
 450         }
 451
 452         div64val = OBD_OBJECT_EOF;
 453         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 454         if (u64val != OBD_OBJECT_EOF) {
 455                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 456                        u64val, (int)sizeof(u64val));
 457                 ret = -EOVERFLOW;
 458         }
 459         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 460                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 461                        u64val, (int)sizeof(u64val));
 462                 return -EOVERFLOW;
 463         }
 464         if (do_div(div64val, 256) != (u64val & 255)) {
 465                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 466                 return -EOVERFLOW;
 467         }
 468         if (u64val >> 8 != div64val) {
 469                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 470                        u64val, div64val, u64val >> 8);
 471                 return -EOVERFLOW;
 472         }
 473         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 474         if (len != 18) {
 475                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 476                 ret = -EINVAL;
 477         }
 478         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 479         if (len != 20) {
 480                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 481                 ret = -EINVAL;
 482         }
 483         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 484         if (len != 2) {
 485                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 486                 ret = -EINVAL;
 487         }
 488         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 489                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 490                       (__u64)CFS_PAGE_SIZE);
 491                 ret = -EINVAL;
 492         }
 493
 494         return ret;
 495 }
 496 #else
 497 #define obd_init_checks() do {} while(0)
 498 #endif
 499
 500 extern spinlock_t obd_types_lock;
 501 extern int class_procfs_init(void);
 502 extern int class_procfs_clean(void);
 503
 504 #ifdef __KERNEL__
 505 static int __init init_obdclass(void)
 506 #else
 507 int init_obdclass(void)
 508 #endif
 509 {
 510         int i, err;
 511 #ifdef __KERNEL__
 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("Lustre: Build Version: "BUILD_VERSION"\n");
 519
 520         spin_lock_init(&obd_types_lock);
 521         obd_zombie_impexp_init();
 522 #ifdef LPROCFS
 523         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 524                                          LPROCFS_STATS_FLAG_NONE |
 525                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 526         if (obd_memory == NULL) {
 527                 CERROR("kmalloc of 'obd_memory' failed\n");
 528                 RETURN(-ENOMEM);
 529         }
 530
 531         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 532                              LPROCFS_CNTR_AVGMINMAX,
 533                              "memused", "bytes");
 534         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 535                              LPROCFS_CNTR_AVGMINMAX,
 536                              "pagesused", "pages");
 537 #endif
 538         err = obd_init_checks();
 539         if (err == -EOVERFLOW)
 540                 return err;
 541
 542         class_init_uuidlist();
 543         err = class_handle_init();
 544         if (err)
 545                 return err;
 546
 547         CFS_INIT_LIST_HEAD(&obd_types);
 548
 549         err = cfs_psdev_register(&obd_psdev);
 550         if (err) {
 551                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 552                 return err;
 553         }
 554
 555         /* This struct is already zeroed for us (static global) */
 556         for (i = 0; i < class_devno_max(); i++)
 557                 obd_devs[i] = NULL;
 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         err = llog_info_init();
 581         if (err)
 582                 return err;
 583
 584 #ifdef __KERNEL__
 585         err = lustre_register_fs();
 586 #endif
 587
 588         return err;
 589 }
 590
 591 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 592  * ifdef to the end of the file to cover module and versioning goo.*/
 593 #ifdef __KERNEL__
 594 static void cleanup_obdclass(void)
 595 {
 596         int i;
 597         int lustre_unregister_fs(void);
 598         __u64 memory_leaked, pages_leaked;
 599         __u64 memory_max, pages_max;
 600         ENTRY;
 601
 602         lustre_unregister_fs();
 603
 604         cfs_psdev_deregister(&obd_psdev);
 605         for (i = 0; i < class_devno_max(); i++) {
 606                 struct obd_device *obd = class_num2obd(i);
 607                 if (obd && obd->obd_set_up &&
 608                     OBT(obd) && OBP(obd, detach)) {
 609                         /* XXX should this call generic detach otherwise? */
 610                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 611                         OBP(obd, detach)(obd);
 612                 }
 613         }
 614         llog_info_fini();
 615         lu_global_fini();
 616
 617         obd_cleanup_caches();
 618         obd_sysctl_clean();
 619
 620         class_procfs_clean();
 621
 622         class_handle_cleanup();
 623         class_exit_uuidlist();
 624         obd_zombie_impexp_stop();
 625
 626         memory_leaked = obd_memory_sum();
 627         pages_leaked = obd_pages_sum();
 628
 629         memory_max = obd_memory_max();
 630         pages_max = obd_pages_max();
 631
 632         lprocfs_free_stats(&obd_memory);
 633         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 634                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 635                memory_max, memory_leaked);
 636         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 637                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 638                pages_max, pages_leaked);
 639
 640         EXIT;
 641 }
 642
 643 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 644 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 645 MODULE_LICENSE("GPL");
 646
 647 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 648 #endif