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, 2014, 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
  39 #include <linux/user_namespace.h>
  40 #ifdef HAVE_UIDGID_HEADER
  41 # include <linux/uidgid.h>
  42 #endif
  43 #include <linux/atomic.h>
  44
  45 #include <obd_support.h>
  46 #include <obd_class.h>
  47 #include <lnet/lnetctl.h>
  48 #include <lustre_debug.h>
  49 #include <lprocfs_status.h>
  50 #include <lustre/lustre_build_version.h>
  51 #include <libcfs/list.h>
  52 #include <cl_object.h>
  53 #ifdef HAVE_SERVER_SUPPORT
  54 # include <dt_object.h>
  55 # include <md_object.h>
  56 #endif /* HAVE_SERVER_SUPPORT */
  57 #include <lustre_ioctl.h>
  58 #include "llog_internal.h"
  59
  60 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  61 struct list_head obd_types;
  62 DEFINE_RWLOCK(obd_dev_lock);
  63
  64 #ifdef CONFIG_PROC_FS
  65 static __u64 obd_max_pages;
  66 static __u64 obd_max_alloc;
  67 #else
  68 __u64 obd_max_pages;
  69 __u64 obd_max_alloc;
  70 #endif
  71
  72 static DEFINE_SPINLOCK(obd_updatemax_lock);
  73
  74 /* The following are visible and mutable through /proc/sys/lustre/. */
  75 unsigned int obd_alloc_fail_rate = 0;
  76 EXPORT_SYMBOL(obd_alloc_fail_rate);
  77 unsigned int obd_debug_peer_on_timeout;
  78 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  79 unsigned int obd_dump_on_timeout;
  80 EXPORT_SYMBOL(obd_dump_on_timeout);
  81 unsigned int obd_dump_on_eviction;
  82 EXPORT_SYMBOL(obd_dump_on_eviction);
  83 unsigned long obd_max_dirty_pages;
  84 EXPORT_SYMBOL(obd_max_dirty_pages);
  85 atomic_long_t obd_dirty_pages;
  86 EXPORT_SYMBOL(obd_dirty_pages);
  87 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  88 EXPORT_SYMBOL(obd_timeout);
  89 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  90 EXPORT_SYMBOL(ldlm_timeout);
  91 unsigned int obd_timeout_set;
  92 EXPORT_SYMBOL(obd_timeout_set);
  93 unsigned int ldlm_timeout_set;
  94 EXPORT_SYMBOL(ldlm_timeout_set);
  95 /* bulk transfer timeout, give up after 100s by default */
  96 unsigned int bulk_timeout = 100; /* seconds */
  97 EXPORT_SYMBOL(bulk_timeout);
  98 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  99 unsigned int at_min = 0;
 100 EXPORT_SYMBOL(at_min);
 101 unsigned int at_max = 600;
 102 EXPORT_SYMBOL(at_max);
 103 unsigned int at_history = 600;
 104 EXPORT_SYMBOL(at_history);
 105 int at_early_margin = 5;
 106 EXPORT_SYMBOL(at_early_margin);
 107 int at_extra = 30;
 108 EXPORT_SYMBOL(at_extra);
 109
 110 atomic_long_t obd_dirty_transit_pages;
 111 EXPORT_SYMBOL(obd_dirty_transit_pages);
 112
 113 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 114
 115 #ifdef CONFIG_PROC_FS
 116 struct lprocfs_stats *obd_memory = NULL;
 117 EXPORT_SYMBOL(obd_memory);
 118 #endif
 119
 120 /* Get jobid of current process by reading the environment variable
 121  * stored in between the "env_start" & "env_end" of task struct.
 122  *
 123  * TODO:
 124  * It's better to cache the jobid for later use if there is any
 125  * efficient way, the cl_env code probably could be reused for this
 126  * purpose.
 127  *
 128  * If some job scheduler doesn't store jobid in the "env_start/end",
 129  * then an upcall could be issued here to get the jobid by utilizing
 130  * the userspace tools/api. Then, the jobid must be cached.
 131  */
 132 int lustre_get_jobid(char *jobid)
 133 {
 134         int jobid_len = LUSTRE_JOBID_SIZE;
 135         int rc = 0;
 136         ENTRY;
 137
 138         memset(jobid, 0, LUSTRE_JOBID_SIZE);
 139         /* Jobstats isn't enabled */
 140         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 141                 RETURN(0);
 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 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 180                    size_t size, const char *file, int line)
 181 {
 182         if (ptr == NULL ||
 183             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 184                 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
 185                        ptr ? "force " :"", type, name, (__u64)size, file,
 186                        line);
 187                 CERROR(LPU64" total bytes and "LPU64" total pages "
 188                        "("LPU64" bytes) allocated by Lustre, "
 189                        "%d total bytes by LNET\n",
 190                        obd_memory_sum(),
 191                        obd_pages_sum() << PAGE_CACHE_SHIFT,
 192                        obd_pages_sum(),
 193                         atomic_read(&libcfs_kmemory));
 194                 return 1;
 195         }
 196         return 0;
 197 }
 198 EXPORT_SYMBOL(obd_alloc_fail);
 199
 200 static int class_resolve_dev_name(__u32 len, const char *name)
 201 {
 202         int rc;
 203         int dev;
 204
 205         ENTRY;
 206         if (!len || !name) {
 207                 CERROR("No name passed,!\n");
 208                 GOTO(out, rc = -EINVAL);
 209         }
 210         if (name[len - 1] != 0) {
 211                 CERROR("Name not nul terminated!\n");
 212                 GOTO(out, rc = -EINVAL);
 213         }
 214
 215         CDEBUG(D_IOCTL, "device name %s\n", name);
 216         dev = class_name2dev(name);
 217         if (dev == -1) {
 218                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 219                 GOTO(out, rc = -EINVAL);
 220         }
 221
 222         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 223         rc = dev;
 224
 225 out:
 226         RETURN(rc);
 227 }
 228
 229 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 230 {
 231         char *buf = NULL;
 232         struct obd_ioctl_data *data;
 233         struct libcfs_debug_ioctl_data *debug_data;
 234         struct obd_device *obd = NULL;
 235         int err = 0, len = 0;
 236         ENTRY;
 237
 238         /* only for debugging */
 239         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 240                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 241                 libcfs_subsystem_debug = debug_data->subs;
 242                 libcfs_debug = debug_data->debug;
 243                 return 0;
 244         }
 245
 246         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 247         if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
 248                 CERROR("OBD ioctl: data error\n");
 249                 RETURN(-EINVAL);
 250         }
 251         data = (struct obd_ioctl_data *)buf;
 252
 253         switch (cmd) {
 254         case OBD_IOC_PROCESS_CFG: {
 255                 struct lustre_cfg *lcfg;
 256
 257                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 258                         CERROR("No config buffer passed!\n");
 259                         GOTO(out, err = -EINVAL);
 260                 }
 261                 OBD_ALLOC(lcfg, data->ioc_plen1);
 262                 if (lcfg == NULL)
 263                         GOTO(out, err = -ENOMEM);
 264                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 265                                          data->ioc_plen1);
 266                 if (!err)
 267                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 268                 if (!err)
 269                         err = class_process_config(lcfg);
 270
 271                 OBD_FREE(lcfg, data->ioc_plen1);
 272                 GOTO(out, err);
 273         }
 274
 275         case OBD_GET_VERSION:
 276                 if (!data->ioc_inlbuf1) {
 277                         CERROR("No buffer passed in ioctl\n");
 278                         GOTO(out, err = -EINVAL);
 279                 }
 280
 281                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 282                         CERROR("ioctl buffer too small to hold version\n");
 283                         GOTO(out, err = -EINVAL);
 284                 }
 285
 286                 memcpy(data->ioc_bulk, BUILD_VERSION,
 287                        strlen(BUILD_VERSION) + 1);
 288
 289                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 290                 if (err)
 291                         err = -EFAULT;
 292                 GOTO(out, err);
 293
 294         case OBD_IOC_NAME2DEV: {
 295                 /* Resolve a device name.  This does not change the
 296                  * currently selected device.
 297                  */
 298                 int dev;
 299
 300                 dev = class_resolve_dev_name(data->ioc_inllen1,
 301                                              data->ioc_inlbuf1);
 302                 data->ioc_dev = dev;
 303                 if (dev < 0)
 304                         GOTO(out, err = -EINVAL);
 305
 306                 err = obd_ioctl_popdata((void __user *)arg, data,
 307                                         sizeof(*data));
 308                 if (err)
 309                         err = -EFAULT;
 310                 GOTO(out, err);
 311         }
 312
 313         case OBD_IOC_UUID2DEV: {
 314                 /* Resolve a device uuid.  This does not change the
 315                  * currently selected device.
 316                  */
 317                 int dev;
 318                 struct obd_uuid uuid;
 319
 320                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 321                         CERROR("No UUID passed!\n");
 322                         GOTO(out, err = -EINVAL);
 323                 }
 324                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 325                         CERROR("UUID not NUL terminated!\n");
 326                         GOTO(out, err = -EINVAL);
 327                 }
 328
 329                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 330                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 331                 dev = class_uuid2dev(&uuid);
 332                 data->ioc_dev = dev;
 333                 if (dev == -1) {
 334                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 335                                data->ioc_inlbuf1);
 336                         GOTO(out, err = -EINVAL);
 337                 }
 338
 339                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 340                        dev);
 341                 err = obd_ioctl_popdata((void __user *)arg, data,
 342                                         sizeof(*data));
 343                 if (err)
 344                         err = -EFAULT;
 345                 GOTO(out, err);
 346         }
 347
 348         case OBD_IOC_GETDEVICE: {
 349                 int     index = data->ioc_count;
 350                 char    *status, *str;
 351
 352                 if (!data->ioc_inlbuf1) {
 353                         CERROR("No buffer passed in ioctl\n");
 354                         GOTO(out, err = -EINVAL);
 355                 }
 356                 if (data->ioc_inllen1 < 128) {
 357                         CERROR("ioctl buffer too small to hold version\n");
 358                         GOTO(out, err = -EINVAL);
 359                 }
 360
 361                 obd = class_num2obd(index);
 362                 if (!obd)
 363                         GOTO(out, err = -ENOENT);
 364
 365                 if (obd->obd_stopping)
 366                         status = "ST";
 367                 else if (obd->obd_set_up)
 368                         status = "UP";
 369                 else if (obd->obd_attached)
 370                         status = "AT";
 371                 else
 372                         status = "--";
 373                 str = (char *)data->ioc_bulk;
 374                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 375                          (int)index, status, obd->obd_type->typ_name,
 376                          obd->obd_name, obd->obd_uuid.uuid,
 377                          atomic_read(&obd->obd_refcount));
 378                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 379
 380                 GOTO(out, err = 0);
 381         }
 382
 383         }
 384
 385         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 386                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 387                         GOTO(out, err = -EINVAL);
 388                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 389                         GOTO(out, err = -EINVAL);
 390                 obd = class_name2obd(data->ioc_inlbuf4);
 391         } else if (data->ioc_dev < class_devno_max()) {
 392                 obd = class_num2obd(data->ioc_dev);
 393         } else {
 394                 CERROR("OBD ioctl: No device\n");
 395                 GOTO(out, err = -EINVAL);
 396         }
 397
 398         if (obd == NULL) {
 399                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 400                 GOTO(out, err = -EINVAL);
 401         }
 402         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 403
 404         if (!obd->obd_set_up || obd->obd_stopping) {
 405                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 406                 GOTO(out, err = -EINVAL);
 407         }
 408
 409         switch(cmd) {
 410         case OBD_IOC_NO_TRANSNO: {
 411                 if (!obd->obd_attached) {
 412                         CERROR("Device %d not attached\n", obd->obd_minor);
 413                         GOTO(out, err = -ENODEV);
 414                 }
 415                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 416                        obd->obd_name);
 417                 obd->obd_no_transno = 1;
 418                 GOTO(out, err = 0);
 419         }
 420
 421         default: {
 422                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 423                 if (err)
 424                         GOTO(out, err);
 425
 426                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 427                 if (err)
 428                         err = -EFAULT;
 429                 GOTO(out, err);
 430         }
 431         }
 432
 433  out:
 434         if (buf)
 435                 obd_ioctl_freedata(buf, len);
 436         RETURN(err);
 437 } /* class_handle_ioctl */
 438
 439 #define OBD_INIT_CHECK
 440 #ifdef OBD_INIT_CHECK
 441 static int obd_init_checks(void)
 442 {
 443         __u64 u64val, div64val;
 444         char buf[64];
 445         int len, ret = 0;
 446
 447         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 448
 449         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 450
 451         u64val = OBD_OBJECT_EOF;
 452         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 453         if (u64val != OBD_OBJECT_EOF) {
 454                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 455                        u64val, (int)sizeof(u64val));
 456                 ret = -EINVAL;
 457         }
 458         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 459         if (len != 18) {
 460                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 461                 ret = -EINVAL;
 462         }
 463
 464         div64val = OBD_OBJECT_EOF;
 465         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 466         if (u64val != OBD_OBJECT_EOF) {
 467                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 468                        u64val, (int)sizeof(u64val));
 469                 ret = -EOVERFLOW;
 470         }
 471         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 472                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 473                        u64val, (int)sizeof(u64val));
 474                 return -EOVERFLOW;
 475         }
 476         if (do_div(div64val, 256) != (u64val & 255)) {
 477                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 478                 return -EOVERFLOW;
 479         }
 480         if (u64val >> 8 != div64val) {
 481                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 482                        u64val, div64val, u64val >> 8);
 483                 return -EOVERFLOW;
 484         }
 485         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 486         if (len != 18) {
 487                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 488                 ret = -EINVAL;
 489         }
 490         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 491         if (len != 20) {
 492                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 493                 ret = -EINVAL;
 494         }
 495         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 496         if (len != 2) {
 497                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 498                 ret = -EINVAL;
 499         }
 500         if ((u64val & ~PAGE_CACHE_MASK) >= PAGE_CACHE_SIZE) {
 501                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 502                       (__u64)PAGE_CACHE_SIZE);
 503                 ret = -EINVAL;
 504         }
 505
 506         return ret;
 507 }
 508 #else
 509 #define obd_init_checks() do {} while(0)
 510 #endif
 511
 512 static int __init init_obdclass(void)
 513 {
 514         int i, err;
 515
 516         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 517                 INIT_LIST_HEAD(&capa_list[i]);
 518
 519         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 520
 521         spin_lock_init(&obd_types_lock);
 522         obd_zombie_impexp_init();
 523 #ifdef CONFIG_PROC_FS
 524         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 525                                          LPROCFS_STATS_FLAG_NONE |
 526                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 527         if (obd_memory == NULL) {
 528                 CERROR("kmalloc of 'obd_memory' failed\n");
 529                 RETURN(-ENOMEM);
 530         }
 531
 532         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 533                              LPROCFS_CNTR_AVGMINMAX,
 534                              "memused", "bytes");
 535         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 536                              LPROCFS_CNTR_AVGMINMAX,
 537                              "pagesused", "pages");
 538 #endif
 539         err = obd_init_checks();
 540         if (err == -EOVERFLOW)
 541                 return err;
 542
 543         class_init_uuidlist();
 544         err = class_handle_init();
 545         if (err)
 546                 return err;
 547
 548         INIT_LIST_HEAD(&obd_types);
 549
 550         err = misc_register(&obd_psdev);
 551         if (err) {
 552                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 553                 return err;
 554         }
 555
 556         /* This struct is already zeroed for us (static global) */
 557         for (i = 0; i < class_devno_max(); i++)
 558                 obd_devs[i] = NULL;
 559
 560         /* Default the dirty page cache cap to 1/2 of system memory.
 561          * For clients with less memory, a larger fraction is needed
 562          * for other purposes (mostly for BGL). */
 563         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 564                 obd_max_dirty_pages = totalram_pages / 4;
 565         else
 566                 obd_max_dirty_pages = totalram_pages / 2;
 567
 568         err = obd_init_caches();
 569         if (err)
 570                 return err;
 571         err = class_procfs_init();
 572         if (err)
 573                 return err;
 574
 575         err = lu_global_init();
 576         if (err)
 577                 return err;
 578
 579         err = lu_capainfo_init();
 580         if (err)
 581                 return err;
 582
 583         err = cl_global_init();
 584         if (err != 0)
 585                 return err;
 586
 587 #ifdef HAVE_SERVER_SUPPORT
 588         err = dt_global_init();
 589         if (err != 0)
 590                 return err;
 591
 592         err = lu_ucred_global_init();
 593         if (err != 0)
 594                 return err;
 595 #endif /* HAVE_SERVER_SUPPORT */
 596
 597         err = llog_info_init();
 598         if (err)
 599                 return err;
 600
 601         err = lustre_register_fs();
 602
 603         return err;
 604 }
 605
 606 void obd_update_maxusage(void)
 607 {
 608         __u64 max1, max2;
 609
 610         max1 = obd_pages_sum();
 611         max2 = obd_memory_sum();
 612
 613         spin_lock(&obd_updatemax_lock);
 614         if (max1 > obd_max_pages)
 615                 obd_max_pages = max1;
 616         if (max2 > obd_max_alloc)
 617                 obd_max_alloc = max2;
 618         spin_unlock(&obd_updatemax_lock);
 619 }
 620 EXPORT_SYMBOL(obd_update_maxusage);
 621
 622 #ifdef CONFIG_PROC_FS
 623 __u64 obd_memory_max(void)
 624 {
 625         __u64 ret;
 626
 627         spin_lock(&obd_updatemax_lock);
 628         ret = obd_max_alloc;
 629         spin_unlock(&obd_updatemax_lock);
 630
 631         return ret;
 632 }
 633
 634 __u64 obd_pages_max(void)
 635 {
 636         __u64 ret;
 637
 638         spin_lock(&obd_updatemax_lock);
 639         ret = obd_max_pages;
 640         spin_unlock(&obd_updatemax_lock);
 641
 642         return ret;
 643 }
 644 #endif /* CONFIG_PROC_FS */
 645
 646 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 647  * ifdef to the end of the file to cover module and versioning goo.*/
 648 static void cleanup_obdclass(void)
 649 {
 650         __u64 memory_leaked, pages_leaked;
 651         __u64 memory_max, pages_max;
 652         ENTRY;
 653
 654         lustre_unregister_fs();
 655
 656         misc_deregister(&obd_psdev);
 657         llog_info_fini();
 658 #ifdef HAVE_SERVER_SUPPORT
 659         lu_ucred_global_fini();
 660         dt_global_fini();
 661 #endif /* HAVE_SERVER_SUPPORT */
 662         cl_global_fini();
 663         lu_capainfo_fini();
 664         lu_global_fini();
 665
 666         obd_cleanup_caches();
 667         obd_sysctl_clean();
 668
 669         class_procfs_clean();
 670
 671         class_handle_cleanup();
 672         class_exit_uuidlist();
 673         obd_zombie_impexp_stop();
 674
 675         memory_leaked = obd_memory_sum();
 676         pages_leaked = obd_pages_sum();
 677
 678         memory_max = obd_memory_max();
 679         pages_max = obd_pages_max();
 680
 681         lprocfs_free_stats(&obd_memory);
 682         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 683                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 684                memory_max, memory_leaked);
 685         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 686                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 687                pages_max, pages_leaked);
 688
 689         EXIT;
 690 }
 691
 692 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 693 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 694 MODULE_VERSION(LUSTRE_VERSION_STRING);
 695 MODULE_LICENSE("GPL");
 696
 697 module_init(init_obdclass);
 698 module_exit(cleanup_obdclass);