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 #include <asm/atomic.h>
  39
  40 #include <obd_support.h>
  41 #include <obd_class.h>
  42 #include <lnet/lnetctl.h>
  43 #include <lustre_debug.h>
  44 #include <lprocfs_status.h>
  45 #include <lustre/lustre_build_version.h>
  46 #include <libcfs/list.h>
  47 #include <cl_object.h>
  48 #ifdef HAVE_SERVER_SUPPORT
  49 # include <dt_object.h>
  50 # include <md_object.h>
  51 #endif /* HAVE_SERVER_SUPPORT */
  52 #include <lustre_ioctl.h>
  53 #include "llog_internal.h"
  54
  55
  56 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  57 EXPORT_SYMBOL(obd_devs);
  58 struct list_head obd_types;
  59 DEFINE_RWLOCK(obd_dev_lock);
  60
  61 __u64 obd_max_pages = 0;
  62 __u64 obd_max_alloc = 0;
  63
  64 static DEFINE_SPINLOCK(obd_updatemax_lock);
  65
  66 /* The following are visible and mutable through /proc/sys/lustre/. */
  67 unsigned int obd_alloc_fail_rate = 0;
  68 EXPORT_SYMBOL(obd_alloc_fail_rate);
  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 int obd_max_dirty_pages = 256;
  76 EXPORT_SYMBOL(obd_max_dirty_pages);
  77 atomic_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 /* 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_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 EXPORT_SYMBOL(obd_jobid_var);
 104
 105 #ifdef LPROCFS
 106 struct lprocfs_stats *obd_memory = NULL;
 107 EXPORT_SYMBOL(obd_memory);
 108 #endif
 109
 110 /* Get jobid of current process by reading the environment variable
 111  * stored in between the "env_start" & "env_end" of task struct.
 112  *
 113  * TODO:
 114  * It's better to cache the jobid for later use if there is any
 115  * efficient way, the cl_env code probably could be reused for this
 116  * purpose.
 117  *
 118  * If some job scheduler doesn't store jobid in the "env_start/end",
 119  * then an upcall could be issued here to get the jobid by utilizing
 120  * the userspace tools/api. Then, the jobid must be cached.
 121  */
 122 int lustre_get_jobid(char *jobid)
 123 {
 124         int jobid_len = JOBSTATS_JOBID_SIZE;
 125         int rc = 0;
 126         ENTRY;
 127
 128         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 129         /* Jobstats isn't enabled */
 130         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 131                 RETURN(0);
 132
 133         /* Use process name + fsuid as jobid */
 134         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 135                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 136                          current_comm(),
 137                          from_kuid(&init_user_ns, current_fsuid()));
 138                 RETURN(0);
 139         }
 140
 141         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 142         if (rc) {
 143                 if (rc == -EOVERFLOW) {
 144                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 145                          * variable length strings instead of just numbers), it
 146                          * might make sense to keep the unique parts for JobID,
 147                          * instead of just returning an error.  That means a
 148                          * larger temp buffer for cfs_get_environ(), then
 149                          * truncating the string at some separator to fit into
 150                          * the specified jobid_len.  Fix later if needed. */
 151                         static bool printed;
 152                         if (unlikely(!printed)) {
 153                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 154                                                    "for JobID buffer (%d)\n",
 155                                                    obd_jobid_var, jobid_len);
 156                                 printed = true;
 157                         }
 158                 } else {
 159                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 160                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 161                                "Get jobid for (%s) failed: rc = %d\n",
 162                                obd_jobid_var, rc);
 163                 }
 164         }
 165         RETURN(rc);
 166 }
 167 EXPORT_SYMBOL(lustre_get_jobid);
 168
 169 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 170                    size_t size, const char *file, int line)
 171 {
 172         if (ptr == NULL ||
 173             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 174                 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
 175                        ptr ? "force " :"", type, name, (__u64)size, file,
 176                        line);
 177                 CERROR(LPU64" total bytes and "LPU64" total pages "
 178                        "("LPU64" bytes) allocated by Lustre, "
 179                        "%d total bytes by LNET\n",
 180                        obd_memory_sum(),
 181                        obd_pages_sum() << PAGE_CACHE_SHIFT,
 182                        obd_pages_sum(),
 183                         atomic_read(&libcfs_kmemory));
 184                 return 1;
 185         }
 186         return 0;
 187 }
 188 EXPORT_SYMBOL(obd_alloc_fail);
 189
 190 static int class_resolve_dev_name(__u32 len, const char *name)
 191 {
 192         int rc;
 193         int dev;
 194
 195         ENTRY;
 196         if (!len || !name) {
 197                 CERROR("No name passed,!\n");
 198                 GOTO(out, rc = -EINVAL);
 199         }
 200         if (name[len - 1] != 0) {
 201                 CERROR("Name not nul terminated!\n");
 202                 GOTO(out, rc = -EINVAL);
 203         }
 204
 205         CDEBUG(D_IOCTL, "device name %s\n", name);
 206         dev = class_name2dev(name);
 207         if (dev == -1) {
 208                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 209                 GOTO(out, rc = -EINVAL);
 210         }
 211
 212         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 213         rc = dev;
 214
 215 out:
 216         RETURN(rc);
 217 }
 218
 219 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 220 {
 221         char *buf = NULL;
 222         struct obd_ioctl_data *data;
 223         struct libcfs_debug_ioctl_data *debug_data;
 224         struct obd_device *obd = NULL;
 225         int err = 0, len = 0;
 226         ENTRY;
 227
 228         /* only for debugging */
 229         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 230                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 231                 libcfs_subsystem_debug = debug_data->subs;
 232                 libcfs_debug = debug_data->debug;
 233                 return 0;
 234         }
 235
 236         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 237         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 238                 CERROR("OBD ioctl: data error\n");
 239                 RETURN(-EINVAL);
 240         }
 241         data = (struct obd_ioctl_data *)buf;
 242
 243         switch (cmd) {
 244         case OBD_IOC_PROCESS_CFG: {
 245                 struct lustre_cfg *lcfg;
 246
 247                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 248                         CERROR("No config buffer passed!\n");
 249                         GOTO(out, err = -EINVAL);
 250                 }
 251                 OBD_ALLOC(lcfg, data->ioc_plen1);
 252                 if (lcfg == NULL)
 253                         GOTO(out, err = -ENOMEM);
 254                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 255                                          data->ioc_plen1);
 256                 if (!err)
 257                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 258                 if (!err)
 259                         err = class_process_config(lcfg);
 260
 261                 OBD_FREE(lcfg, data->ioc_plen1);
 262                 GOTO(out, err);
 263         }
 264
 265         case OBD_GET_VERSION:
 266                 if (!data->ioc_inlbuf1) {
 267                         CERROR("No buffer passed in ioctl\n");
 268                         GOTO(out, err = -EINVAL);
 269                 }
 270
 271                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 272                         CERROR("ioctl buffer too small to hold version\n");
 273                         GOTO(out, err = -EINVAL);
 274                 }
 275
 276                 memcpy(data->ioc_bulk, BUILD_VERSION,
 277                        strlen(BUILD_VERSION) + 1);
 278
 279                 err = obd_ioctl_popdata((void *)arg, data, len);
 280                 if (err)
 281                         err = -EFAULT;
 282                 GOTO(out, err);
 283
 284         case OBD_IOC_NAME2DEV: {
 285                 /* Resolve a device name.  This does not change the
 286                  * currently selected device.
 287                  */
 288                 int dev;
 289
 290                 dev = class_resolve_dev_name(data->ioc_inllen1,
 291                                              data->ioc_inlbuf1);
 292                 data->ioc_dev = dev;
 293                 if (dev < 0)
 294                         GOTO(out, err = -EINVAL);
 295
 296                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 297                 if (err)
 298                         err = -EFAULT;
 299                 GOTO(out, err);
 300         }
 301
 302         case OBD_IOC_UUID2DEV: {
 303                 /* Resolve a device uuid.  This does not change the
 304                  * currently selected device.
 305                  */
 306                 int dev;
 307                 struct obd_uuid uuid;
 308
 309                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 310                         CERROR("No UUID passed!\n");
 311                         GOTO(out, err = -EINVAL);
 312                 }
 313                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 314                         CERROR("UUID not NUL terminated!\n");
 315                         GOTO(out, err = -EINVAL);
 316                 }
 317
 318                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 319                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 320                 dev = class_uuid2dev(&uuid);
 321                 data->ioc_dev = dev;
 322                 if (dev == -1) {
 323                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 324                                data->ioc_inlbuf1);
 325                         GOTO(out, err = -EINVAL);
 326                 }
 327
 328                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 329                        dev);
 330                 err = obd_ioctl_popdata((void *)arg, data, 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 *)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 *)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 extern struct miscdevice obd_psdev;
 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, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 438
 439         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 440
 441         u64val = OBD_OBJECT_EOF;
 442         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 443         if (u64val != OBD_OBJECT_EOF) {
 444                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 445                        u64val, (int)sizeof(u64val));
 446                 ret = -EINVAL;
 447         }
 448         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 449         if (len != 18) {
 450                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 451                 ret = -EINVAL;
 452         }
 453
 454         div64val = OBD_OBJECT_EOF;
 455         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 456         if (u64val != OBD_OBJECT_EOF) {
 457                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 458                        u64val, (int)sizeof(u64val));
 459                 ret = -EOVERFLOW;
 460         }
 461         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 462                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 463                        u64val, (int)sizeof(u64val));
 464                 return -EOVERFLOW;
 465         }
 466         if (do_div(div64val, 256) != (u64val & 255)) {
 467                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 468                 return -EOVERFLOW;
 469         }
 470         if (u64val >> 8 != div64val) {
 471                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 472                        u64val, div64val, u64val >> 8);
 473                 return -EOVERFLOW;
 474         }
 475         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 476         if (len != 18) {
 477                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 478                 ret = -EINVAL;
 479         }
 480         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 481         if (len != 20) {
 482                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 483                 ret = -EINVAL;
 484         }
 485         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 486         if (len != 2) {
 487                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 488                 ret = -EINVAL;
 489         }
 490         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 491                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 492                       (__u64)PAGE_CACHE_SIZE);
 493                 ret = -EINVAL;
 494         }
 495
 496         return ret;
 497 }
 498 #else
 499 #define obd_init_checks() do {} while(0)
 500 #endif
 501
 502 extern int class_procfs_init(void);
 503 extern int class_procfs_clean(void);
 504
 505 static int __init init_obdclass(void)
 506 {
 507         int i, err;
 508         int lustre_register_fs(void);
 509
 510         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 511                 INIT_LIST_HEAD(&capa_list[i]);
 512
 513         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 514
 515         spin_lock_init(&obd_types_lock);
 516         obd_zombie_impexp_init();
 517 #ifdef LPROCFS
 518         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 519                                          LPROCFS_STATS_FLAG_NONE |
 520                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 521         if (obd_memory == NULL) {
 522                 CERROR("kmalloc of 'obd_memory' failed\n");
 523                 RETURN(-ENOMEM);
 524         }
 525
 526         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 527                              LPROCFS_CNTR_AVGMINMAX,
 528                              "memused", "bytes");
 529         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 530                              LPROCFS_CNTR_AVGMINMAX,
 531                              "pagesused", "pages");
 532 #endif
 533         err = obd_init_checks();
 534         if (err == -EOVERFLOW)
 535                 return err;
 536
 537         class_init_uuidlist();
 538         err = class_handle_init();
 539         if (err)
 540                 return err;
 541
 542         INIT_LIST_HEAD(&obd_types);
 543
 544         err = misc_register(&obd_psdev);
 545         if (err) {
 546                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 547                 return err;
 548         }
 549
 550         /* This struct is already zeroed for us (static global) */
 551         for (i = 0; i < class_devno_max(); i++)
 552                 obd_devs[i] = NULL;
 553
 554         /* Default the dirty page cache cap to 1/2 of system memory.
 555          * For clients with less memory, a larger fraction is needed
 556          * for other purposes (mostly for BGL). */
 557         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 558                 obd_max_dirty_pages = totalram_pages / 4;
 559         else
 560                 obd_max_dirty_pages = totalram_pages / 2;
 561
 562         err = obd_init_caches();
 563         if (err)
 564                 return err;
 565         err = class_procfs_init();
 566         if (err)
 567                 return err;
 568
 569         err = lu_global_init();
 570         if (err)
 571                 return err;
 572
 573         err = lu_capainfo_init();
 574         if (err)
 575                 return err;
 576
 577         err = cl_global_init();
 578         if (err != 0)
 579                 return err;
 580
 581 #ifdef HAVE_SERVER_SUPPORT
 582         err = dt_global_init();
 583         if (err != 0)
 584                 return err;
 585
 586         err = lu_ucred_global_init();
 587         if (err != 0)
 588                 return err;
 589 #endif /* HAVE_SERVER_SUPPORT */
 590
 591         err = llog_info_init();
 592         if (err)
 593                 return err;
 594
 595         err = lustre_register_fs();
 596
 597         return err;
 598 }
 599
 600 void obd_update_maxusage(void)
 601 {
 602         __u64 max1, max2;
 603
 604         max1 = obd_pages_sum();
 605         max2 = obd_memory_sum();
 606
 607         spin_lock(&obd_updatemax_lock);
 608         if (max1 > obd_max_pages)
 609                 obd_max_pages = max1;
 610         if (max2 > obd_max_alloc)
 611                 obd_max_alloc = max2;
 612         spin_unlock(&obd_updatemax_lock);
 613 }
 614 EXPORT_SYMBOL(obd_update_maxusage);
 615
 616 #ifdef LPROCFS
 617 __u64 obd_memory_max(void)
 618 {
 619         __u64 ret;
 620
 621         spin_lock(&obd_updatemax_lock);
 622         ret = obd_max_alloc;
 623         spin_unlock(&obd_updatemax_lock);
 624
 625         return ret;
 626 }
 627 EXPORT_SYMBOL(obd_memory_max);
 628
 629 __u64 obd_pages_max(void)
 630 {
 631         __u64 ret;
 632
 633         spin_lock(&obd_updatemax_lock);
 634         ret = obd_max_pages;
 635         spin_unlock(&obd_updatemax_lock);
 636
 637         return ret;
 638 }
 639 EXPORT_SYMBOL(obd_pages_max);
 640 #endif /* LPROCFS */
 641
 642 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 643  * ifdef to the end of the file to cover module and versioning goo.*/
 644 static void cleanup_obdclass(void)
 645 {
 646         int lustre_unregister_fs(void);
 647         __u64 memory_leaked, pages_leaked;
 648         __u64 memory_max, pages_max;
 649         ENTRY;
 650
 651         lustre_unregister_fs();
 652
 653         misc_deregister(&obd_psdev);
 654         llog_info_fini();
 655 #ifdef HAVE_SERVER_SUPPORT
 656         lu_ucred_global_fini();
 657         dt_global_fini();
 658 #endif /* HAVE_SERVER_SUPPORT */
 659         cl_global_fini();
 660         lu_capainfo_fini();
 661         lu_global_fini();
 662
 663         obd_cleanup_caches();
 664         obd_sysctl_clean();
 665
 666         class_procfs_clean();
 667
 668         class_handle_cleanup();
 669         class_exit_uuidlist();
 670         obd_zombie_impexp_stop();
 671
 672         memory_leaked = obd_memory_sum();
 673         pages_leaked = obd_pages_sum();
 674
 675         memory_max = obd_memory_max();
 676         pages_max = obd_pages_max();
 677
 678         lprocfs_free_stats(&obd_memory);
 679         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 680                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 681                memory_max, memory_leaked);
 682         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 683                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 684                pages_max, pages_leaked);
 685
 686         EXIT;
 687 }
 688
 689 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 690 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 691 MODULE_LICENSE("GPL");
 692
 693 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);