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 <lustre_kernelcomm.h>
  47 #include <lprocfs_status.h>
  48 #include <lustre_ver.h>
  49 #include <cl_object.h>
  50 #ifdef HAVE_SERVER_SUPPORT
  51 # include <dt_object.h>
  52 # include <md_object.h>
  53 #endif /* HAVE_SERVER_SUPPORT */
  54 #include <uapi/linux/lustre_ioctl.h>
  55 #include "llog_internal.h"
  56
  57 #ifdef CONFIG_PROC_FS
  58 static __u64 obd_max_alloc;
  59 #else
  60 __u64 obd_max_alloc;
  61 #endif
  62
  63 static DEFINE_SPINLOCK(obd_updatemax_lock);
  64
  65 /* The following are visible and mutable through /proc/sys/lustre/. */
  66 unsigned int obd_debug_peer_on_timeout;
  67 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  68 unsigned int obd_dump_on_timeout;
  69 EXPORT_SYMBOL(obd_dump_on_timeout);
  70 unsigned int obd_dump_on_eviction;
  71 EXPORT_SYMBOL(obd_dump_on_eviction);
  72 unsigned long obd_max_dirty_pages;
  73 EXPORT_SYMBOL(obd_max_dirty_pages);
  74 atomic_long_t obd_dirty_pages;
  75 EXPORT_SYMBOL(obd_dirty_pages);
  76 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  77 EXPORT_SYMBOL(obd_timeout);
  78 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  79 EXPORT_SYMBOL(ldlm_timeout);
  80 unsigned int obd_timeout_set;
  81 EXPORT_SYMBOL(obd_timeout_set);
  82 unsigned int ldlm_timeout_set;
  83 EXPORT_SYMBOL(ldlm_timeout_set);
  84 /* bulk transfer timeout, give up after 100s by default */
  85 unsigned int bulk_timeout = 100; /* seconds */
  86 EXPORT_SYMBOL(bulk_timeout);
  87 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  88 unsigned int at_min = 0;
  89 EXPORT_SYMBOL(at_min);
  90 unsigned int at_max = 600;
  91 EXPORT_SYMBOL(at_max);
  92 unsigned int at_history = 600;
  93 EXPORT_SYMBOL(at_history);
  94 int at_early_margin = 5;
  95 EXPORT_SYMBOL(at_early_margin);
  96 int at_extra = 30;
  97 EXPORT_SYMBOL(at_extra);
  98
  99 atomic_long_t obd_dirty_transit_pages;
 100 EXPORT_SYMBOL(obd_dirty_transit_pages);
 101
 102 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 103
 104 #ifdef CONFIG_PROC_FS
 105 struct lprocfs_stats *obd_memory = NULL;
 106 EXPORT_SYMBOL(obd_memory);
 107 #endif
 108
 109 char obd_jobid_node[LUSTRE_JOBID_SIZE + 1];
 110
 111 /* Get jobid of current process by reading the environment variable
 112  * stored in between the "env_start" & "env_end" of task struct.
 113  *
 114  * TODO:
 115  * It's better to cache the jobid for later use if there is any
 116  * efficient way, the cl_env code probably could be reused for this
 117  * purpose.
 118  *
 119  * If some job scheduler doesn't store jobid in the "env_start/end",
 120  * then an upcall could be issued here to get the jobid by utilizing
 121  * the userspace tools/api. Then, the jobid must be cached.
 122  */
 123 int lustre_get_jobid(char *jobid)
 124 {
 125         int jobid_len = LUSTRE_JOBID_SIZE;
 126         char tmp_jobid[LUSTRE_JOBID_SIZE] = { 0 };
 127         int rc = 0;
 128         ENTRY;
 129
 130         /* Jobstats isn't enabled */
 131         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 132                 GOTO(out, rc = 0);
 133
 134         /* Whole node dedicated to single job */
 135         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) {
 136                 memcpy(tmp_jobid, obd_jobid_node, LUSTRE_JOBID_SIZE);
 137                 GOTO(out, rc = 0);
 138         }
 139
 140         /* Use process name + fsuid as jobid */
 141         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 142                 snprintf(tmp_jobid, LUSTRE_JOBID_SIZE, "%s.%u",
 143                          current_comm(),
 144                          from_kuid(&init_user_ns, current_fsuid()));
 145                 GOTO(out, rc = 0);
 146         }
 147
 148         rc = cfs_get_environ(obd_jobid_var, tmp_jobid, &jobid_len);
 149         if (rc) {
 150                 if (rc == -EOVERFLOW) {
 151                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 152                          * variable length strings instead of just numbers), it
 153                          * might make sense to keep the unique parts for JobID,
 154                          * instead of just returning an error.  That means a
 155                          * larger temp buffer for cfs_get_environ(), then
 156                          * truncating the string at some separator to fit into
 157                          * the specified jobid_len.  Fix later if needed. */
 158                         static bool printed;
 159                         if (unlikely(!printed)) {
 160                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 161                                                    "for JobID buffer (%d)\n",
 162                                                    obd_jobid_var, jobid_len);
 163                                 printed = true;
 164                         }
 165                 } else {
 166                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 167                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 168                                "Get jobid for (%s) failed: rc = %d\n",
 169                                obd_jobid_var, rc);
 170                 }
 171         }
 172
 173 out:
 174         if (rc != 0)
 175                 RETURN(rc);
 176
 177         /* Only replace the job ID if it changed. */
 178         if (strcmp(jobid, tmp_jobid) != 0)
 179                 memcpy(jobid, tmp_jobid, jobid_len);
 180
 181         RETURN(0);
 182 }
 183 EXPORT_SYMBOL(lustre_get_jobid);
 184
 185 static int class_resolve_dev_name(__u32 len, const char *name)
 186 {
 187         int rc;
 188         int dev;
 189
 190         ENTRY;
 191         if (!len || !name) {
 192                 CERROR("No name passed,!\n");
 193                 GOTO(out, rc = -EINVAL);
 194         }
 195         if (name[len - 1] != 0) {
 196                 CERROR("Name not nul terminated!\n");
 197                 GOTO(out, rc = -EINVAL);
 198         }
 199
 200         CDEBUG(D_IOCTL, "device name %s\n", name);
 201         dev = class_name2dev(name);
 202         if (dev == -1) {
 203                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 204                 GOTO(out, rc = -EINVAL);
 205         }
 206
 207         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 208         rc = dev;
 209
 210 out:
 211         RETURN(rc);
 212 }
 213
 214 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 215 {
 216         char *buf = NULL;
 217         struct obd_ioctl_data *data;
 218         struct libcfs_debug_ioctl_data *debug_data;
 219         struct obd_device *obd = NULL;
 220         int err = 0, len = 0;
 221         ENTRY;
 222
 223         /* only for debugging */
 224         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 225                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 226                 libcfs_subsystem_debug = debug_data->subs;
 227                 libcfs_debug = debug_data->debug;
 228                 return 0;
 229         }
 230
 231         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 232         if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
 233                 CERROR("OBD ioctl: data error\n");
 234                 RETURN(-EINVAL);
 235         }
 236         data = (struct obd_ioctl_data *)buf;
 237
 238         switch (cmd) {
 239         case OBD_IOC_PROCESS_CFG: {
 240                 struct lustre_cfg *lcfg;
 241
 242                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 243                         CERROR("No config buffer passed!\n");
 244                         GOTO(out, err = -EINVAL);
 245                 }
 246                 OBD_ALLOC(lcfg, data->ioc_plen1);
 247                 if (lcfg == NULL)
 248                         GOTO(out, err = -ENOMEM);
 249                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 250                                          data->ioc_plen1);
 251                 if (!err)
 252                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 253                 if (!err)
 254                         err = class_process_config(lcfg);
 255
 256                 OBD_FREE(lcfg, data->ioc_plen1);
 257                 GOTO(out, err);
 258         }
 259
 260 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
 261         case OBD_GET_VERSION: {
 262                 static bool warned;
 263
 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                 if (!warned) {
 275                         warned = true;
 276                         CWARN("%s: ioctl(OBD_GET_VERSION) is deprecated, "
 277                               "use llapi_get_version_string() and/or relink\n",
 278                               current->comm);
 279                 }
 280                 memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING,
 281                        strlen(LUSTRE_VERSION_STRING) + 1);
 282
 283                 if (copy_to_user((void __user *)arg, data, len))
 284                         err = -EFAULT;
 285                 GOTO(out, err);
 286         }
 287 #endif
 288         case OBD_IOC_NAME2DEV: {
 289                 /* Resolve a device name.  This does not change the
 290                  * currently selected device.
 291                  */
 292                 int dev;
 293
 294                 dev = class_resolve_dev_name(data->ioc_inllen1,
 295                                              data->ioc_inlbuf1);
 296                 data->ioc_dev = dev;
 297                 if (dev < 0)
 298                         GOTO(out, err = -EINVAL);
 299
 300                 if (copy_to_user((void __user *)arg, data, sizeof(*data)))
 301                         err = -EFAULT;
 302                 GOTO(out, err);
 303         }
 304
 305         case OBD_IOC_UUID2DEV: {
 306                 /* Resolve a device uuid.  This does not change the
 307                  * currently selected device.
 308                  */
 309                 int dev;
 310                 struct obd_uuid uuid;
 311
 312                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 313                         CERROR("No UUID passed!\n");
 314                         GOTO(out, err = -EINVAL);
 315                 }
 316                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 317                         CERROR("UUID not NUL terminated!\n");
 318                         GOTO(out, err = -EINVAL);
 319                 }
 320
 321                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 322                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 323                 dev = class_uuid2dev(&uuid);
 324                 data->ioc_dev = dev;
 325                 if (dev == -1) {
 326                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 327                                data->ioc_inlbuf1);
 328                         GOTO(out, err = -EINVAL);
 329                 }
 330
 331                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 332                        dev);
 333                 if (copy_to_user((void __user *)arg, data, sizeof(*data)))
 334                         err = -EFAULT;
 335                 GOTO(out, err);
 336         }
 337
 338         case OBD_IOC_GETDEVICE: {
 339                 int     index = data->ioc_count;
 340                 char    *status, *str;
 341
 342                 if (!data->ioc_inlbuf1) {
 343                         CERROR("No buffer passed in ioctl\n");
 344                         GOTO(out, err = -EINVAL);
 345                 }
 346                 if (data->ioc_inllen1 < 128) {
 347                         CERROR("ioctl buffer too small to hold version\n");
 348                         GOTO(out, err = -EINVAL);
 349                 }
 350
 351                 obd = class_num2obd(index);
 352                 if (!obd)
 353                         GOTO(out, err = -ENOENT);
 354
 355                 if (obd->obd_stopping)
 356                         status = "ST";
 357                 else if (obd->obd_set_up)
 358                         status = "UP";
 359                 else if (obd->obd_attached)
 360                         status = "AT";
 361                 else
 362                         status = "--";
 363                 str = (char *)data->ioc_bulk;
 364                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 365                          (int)index, status, obd->obd_type->typ_name,
 366                          obd->obd_name, obd->obd_uuid.uuid,
 367                          atomic_read(&obd->obd_refcount));
 368
 369                 if (copy_to_user((void __user *)arg, data, len))
 370                         err = -EFAULT;
 371
 372                 GOTO(out, err);
 373         }
 374
 375         }
 376
 377         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 378                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 379                         GOTO(out, err = -EINVAL);
 380                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 381                         GOTO(out, err = -EINVAL);
 382                 obd = class_name2obd(data->ioc_inlbuf4);
 383         } else if (data->ioc_dev < class_devno_max()) {
 384                 obd = class_num2obd(data->ioc_dev);
 385         } else {
 386                 CERROR("OBD ioctl: No device\n");
 387                 GOTO(out, err = -EINVAL);
 388         }
 389
 390         if (obd == NULL) {
 391                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 392                 GOTO(out, err = -EINVAL);
 393         }
 394         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 395
 396         if (!obd->obd_set_up || obd->obd_stopping) {
 397                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 398                 GOTO(out, err = -EINVAL);
 399         }
 400
 401         switch(cmd) {
 402         case OBD_IOC_NO_TRANSNO: {
 403                 if (!obd->obd_attached) {
 404                         CERROR("Device %d not attached\n", obd->obd_minor);
 405                         GOTO(out, err = -ENODEV);
 406                 }
 407                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 408                        obd->obd_name);
 409                 obd->obd_no_transno = 1;
 410                 GOTO(out, err = 0);
 411         }
 412
 413         default: {
 414                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 415                 if (err)
 416                         GOTO(out, err);
 417
 418                 if (copy_to_user((void __user *)arg, data, len))
 419                         err = -EFAULT;
 420                 GOTO(out, err);
 421         }
 422         }
 423
 424 out:
 425         OBD_FREE_LARGE(buf, len);
 426         RETURN(err);
 427 } /* class_handle_ioctl */
 428
 429 #define OBD_INIT_CHECK
 430 #ifdef OBD_INIT_CHECK
 431 static int obd_init_checks(void)
 432 {
 433         __u64 u64val, div64val;
 434         char buf[64];
 435         int len, ret = 0;
 436
 437         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
 438
 439         u64val = OBD_OBJECT_EOF;
 440         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 441         if (u64val != OBD_OBJECT_EOF) {
 442                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 443                        u64val, (int)sizeof(u64val));
 444                 ret = -EINVAL;
 445         }
 446         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 447         if (len != 18) {
 448                 CWARN("u64 hex 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 = %#llx\n", u64val);
 454         if (u64val != OBD_OBJECT_EOF) {
 455                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 456                        u64val, (int)sizeof(u64val));
 457                 ret = -EOVERFLOW;
 458         }
 459         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 460                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 461                        u64val, (int)sizeof(u64val));
 462                 return -EOVERFLOW;
 463         }
 464         if (do_div(div64val, 256) != (u64val & 255)) {
 465                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255);
 466                 return -EOVERFLOW;
 467         }
 468         if (u64val >> 8 != div64val) {
 469                 CERROR("do_div(%#llx,256) %llu != %llu\n",
 470                        u64val, div64val, u64val >> 8);
 471                 return -EOVERFLOW;
 472         }
 473         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 474         if (len != 18) {
 475                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 476                 ret = -EINVAL;
 477         }
 478         len = snprintf(buf, sizeof(buf), "%llu", u64val);
 479         if (len != 20) {
 480                 CWARN("u64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 481                 ret = -EINVAL;
 482         }
 483         len = snprintf(buf, sizeof(buf), "%lld", u64val);
 484         if (len != 2) {
 485                 CWARN("s64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 486                 ret = -EINVAL;
 487         }
 488         if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) {
 489                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
 490                       (__u64)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 static int __init obdclass_init(void)
 501 {
 502         int err;
 503
 504         LCONSOLE_INFO("Lustre: Build Version: "LUSTRE_VERSION_STRING"\n");
 505
 506         libcfs_kkuc_init();
 507
 508         err = obd_init_checks();
 509         if (err == -EOVERFLOW)
 510                 return err;
 511
 512 #ifdef CONFIG_PROC_FS
 513         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 514                                          LPROCFS_STATS_FLAG_NONE |
 515                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 516         if (obd_memory == NULL) {
 517                 CERROR("kmalloc of 'obd_memory' failed\n");
 518                 return -ENOMEM;
 519         }
 520
 521         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 522                              LPROCFS_CNTR_AVGMINMAX,
 523                              "memused", "bytes");
 524 #endif
 525         err = obd_zombie_impexp_init();
 526         if (err)
 527                 goto cleanup_obd_memory;
 528
 529         err = class_handle_init();
 530         if (err)
 531                 goto cleanup_zombie_impexp;
 532
 533         err = misc_register(&obd_psdev);
 534         if (err) {
 535                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 536                 goto cleanup_class_handle;
 537         }
 538
 539         /* Default the dirty page cache cap to 1/2 of system memory.
 540          * For clients with less memory, a larger fraction is needed
 541          * for other purposes (mostly for BGL). */
 542         if (totalram_pages <= 512 << (20 - PAGE_SHIFT))
 543                 obd_max_dirty_pages = totalram_pages / 4;
 544         else
 545                 obd_max_dirty_pages = totalram_pages / 2;
 546
 547         err = obd_init_caches();
 548         if (err)
 549                 goto cleanup_deregister;
 550
 551         err = class_procfs_init();
 552         if (err)
 553                 goto cleanup_caches;
 554
 555         err = lu_global_init();
 556         if (err)
 557                 goto cleanup_class_procfs;
 558
 559         err = cl_global_init();
 560         if (err != 0)
 561                 goto cleanup_lu_global;
 562
 563 #ifdef HAVE_SERVER_SUPPORT
 564         err = dt_global_init();
 565         if (err != 0)
 566                 goto cleanup_cl_global;
 567
 568         err = lu_ucred_global_init();
 569         if (err != 0)
 570                 goto cleanup_dt_global;
 571 #endif /* HAVE_SERVER_SUPPORT */
 572
 573         err = llog_info_init();
 574         if (err)
 575 #ifdef HAVE_SERVER_SUPPORT
 576                 goto cleanup_lu_ucred_global;
 577 #else /* !HAVE_SERVER_SUPPORT */
 578                 goto cleanup_cl_global;
 579 #endif /* HAVE_SERVER_SUPPORT */
 580
 581         err = lustre_register_fs();
 582
 583         /* simulate a late OOM situation now to require all
 584          * alloc'ed/initialized resources to be freed */
 585         if (OBD_FAIL_CHECK(OBD_FAIL_OBDCLASS_MODULE_LOAD)) {
 586                 /* fake error but filesystem has been registered */
 587                 lustre_unregister_fs();
 588                 /* force error to ensure module will be unloaded/cleaned */
 589                 err = -ENOMEM;
 590         }
 591
 592         if (err)
 593                 goto cleanup_llog_info;
 594
 595         return 0;
 596
 597 cleanup_llog_info:
 598         llog_info_fini();
 599
 600 #ifdef HAVE_SERVER_SUPPORT
 601 cleanup_lu_ucred_global:
 602         lu_ucred_global_fini();
 603
 604 cleanup_dt_global:
 605         dt_global_fini();
 606 #endif /* HAVE_SERVER_SUPPORT */
 607
 608 cleanup_cl_global:
 609         cl_global_fini();
 610
 611 cleanup_lu_global:
 612         lu_global_fini();
 613
 614 cleanup_class_procfs:
 615         obd_sysctl_clean();
 616         class_procfs_clean();
 617
 618 cleanup_caches:
 619         obd_cleanup_caches();
 620
 621 cleanup_deregister:
 622         misc_deregister(&obd_psdev);
 623
 624 cleanup_class_handle:
 625         class_handle_cleanup();
 626
 627 cleanup_zombie_impexp:
 628         obd_zombie_impexp_stop();
 629
 630 cleanup_obd_memory:
 631 #ifdef CONFIG_PROC_FS
 632         lprocfs_free_stats(&obd_memory);
 633 #endif
 634
 635         return err;
 636 }
 637
 638 void obd_update_maxusage(void)
 639 {
 640         __u64 max;
 641
 642         max = obd_memory_sum();
 643
 644         spin_lock(&obd_updatemax_lock);
 645         if (max > obd_max_alloc)
 646                 obd_max_alloc = max;
 647         spin_unlock(&obd_updatemax_lock);
 648 }
 649 EXPORT_SYMBOL(obd_update_maxusage);
 650
 651 #ifdef CONFIG_PROC_FS
 652 __u64 obd_memory_max(void)
 653 {
 654         __u64 ret;
 655
 656         obd_update_maxusage();
 657         spin_lock(&obd_updatemax_lock);
 658         ret = obd_max_alloc;
 659         spin_unlock(&obd_updatemax_lock);
 660
 661         return ret;
 662 }
 663 #endif /* CONFIG_PROC_FS */
 664
 665 static void __exit obdclass_exit(void)
 666 {
 667 #ifdef CONFIG_PROC_FS
 668         __u64 memory_leaked;
 669         __u64 memory_max;
 670 #endif /* CONFIG_PROC_FS */
 671         ENTRY;
 672
 673         lustre_unregister_fs();
 674
 675         misc_deregister(&obd_psdev);
 676         llog_info_fini();
 677 #ifdef HAVE_SERVER_SUPPORT
 678         lu_ucred_global_fini();
 679         dt_global_fini();
 680 #endif /* HAVE_SERVER_SUPPORT */
 681         cl_global_fini();
 682         lu_global_fini();
 683
 684         obd_cleanup_caches();
 685         obd_sysctl_clean();
 686
 687         class_procfs_clean();
 688
 689         class_handle_cleanup();
 690         class_del_uuid(NULL); /* Delete all UUIDs. */
 691         obd_zombie_impexp_stop();
 692
 693 #ifdef CONFIG_PROC_FS
 694         memory_leaked = obd_memory_sum();
 695         memory_max = obd_memory_max();
 696
 697         lprocfs_free_stats(&obd_memory);
 698         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 699                "obd_memory max: %llu, leaked: %llu\n",
 700                memory_max, memory_leaked);
 701 #endif /* CONFIG_PROC_FS */
 702
 703         EXIT;
 704 }
 705
 706 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 707 MODULE_DESCRIPTION("Lustre Class Driver");
 708 MODULE_VERSION(LUSTRE_VERSION_STRING);
 709 MODULE_LICENSE("GPL");
 710
 711 module_init(obdclass_init);
 712 module_exit(obdclass_exit);