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 <cl_object.h>
  52 #ifdef HAVE_SERVER_SUPPORT
  53 # include <dt_object.h>
  54 # include <md_object.h>
  55 #endif /* HAVE_SERVER_SUPPORT */
  56 #include <lustre_ioctl.h>
  57 #include "llog_internal.h"
  58
  59 #ifndef __KERNEL__
  60 /* liblustre workaround */
  61 atomic_t libcfs_kmemory = {0};
  62 #endif
  63
  64 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  65 EXPORT_SYMBOL(obd_devs);
  66 cfs_list_t obd_types;
  67 DEFINE_RWLOCK(obd_dev_lock);
  68
  69 __u64 obd_max_pages = 0;
  70 __u64 obd_max_alloc = 0;
  71 #ifndef __KERNEL__
  72 __u64 obd_alloc;
  73 __u64 obd_pages;
  74 #endif
  75 DEFINE_SPINLOCK(obd_updatemax_lock);
  76
  77 /* The following are visible and mutable through /proc/sys/lustre/. */
  78 unsigned int obd_alloc_fail_rate = 0;
  79 EXPORT_SYMBOL(obd_alloc_fail_rate);
  80 unsigned int obd_debug_peer_on_timeout;
  81 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  82 unsigned int obd_dump_on_timeout;
  83 EXPORT_SYMBOL(obd_dump_on_timeout);
  84 unsigned int obd_dump_on_eviction;
  85 EXPORT_SYMBOL(obd_dump_on_eviction);
  86 unsigned int obd_max_dirty_pages = 256;
  87 EXPORT_SYMBOL(obd_max_dirty_pages);
  88 atomic_t obd_unstable_pages;
  89 EXPORT_SYMBOL(obd_unstable_pages);
  90 atomic_t obd_dirty_pages;
  91 EXPORT_SYMBOL(obd_dirty_pages);
  92 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  93 EXPORT_SYMBOL(obd_timeout);
  94 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  95 EXPORT_SYMBOL(ldlm_timeout);
  96 unsigned int obd_timeout_set;
  97 EXPORT_SYMBOL(obd_timeout_set);
  98 unsigned int ldlm_timeout_set;
  99 EXPORT_SYMBOL(ldlm_timeout_set);
 100 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
 101 unsigned int at_min = 0;
 102 EXPORT_SYMBOL(at_min);
 103 unsigned int at_max = 600;
 104 EXPORT_SYMBOL(at_max);
 105 unsigned int at_history = 600;
 106 EXPORT_SYMBOL(at_history);
 107 int at_early_margin = 5;
 108 EXPORT_SYMBOL(at_early_margin);
 109 int at_extra = 30;
 110 EXPORT_SYMBOL(at_extra);
 111
 112 atomic_t obd_dirty_transit_pages;
 113 EXPORT_SYMBOL(obd_dirty_transit_pages);
 114
 115 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 116 EXPORT_SYMBOL(obd_jobid_var);
 117
 118 #ifdef LPROCFS
 119 struct lprocfs_stats *obd_memory = NULL;
 120 EXPORT_SYMBOL(obd_memory);
 121 #endif
 122
 123 /* Get jobid of current process by reading the environment variable
 124  * stored in between the "env_start" & "env_end" of task struct.
 125  *
 126  * TODO:
 127  * It's better to cache the jobid for later use if there is any
 128  * efficient way, the cl_env code probably could be reused for this
 129  * purpose.
 130  *
 131  * If some job scheduler doesn't store jobid in the "env_start/end",
 132  * then an upcall could be issued here to get the jobid by utilizing
 133  * the userspace tools/api. Then, the jobid must be cached.
 134  */
 135 int lustre_get_jobid(char *jobid)
 136 {
 137         int jobid_len = JOBSTATS_JOBID_SIZE;
 138         int rc = 0;
 139         ENTRY;
 140
 141         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 142         /* Jobstats isn't enabled */
 143         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 144                 RETURN(0);
 145
 146         /* Use process name + fsuid as jobid */
 147         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 148                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 149                          current_comm(),
 150                          from_kuid(&init_user_ns, current_fsuid()));
 151                 RETURN(0);
 152         }
 153
 154         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 155         if (rc) {
 156                 if (rc == -EOVERFLOW) {
 157                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 158                          * variable length strings instead of just numbers), it
 159                          * might make sense to keep the unique parts for JobID,
 160                          * instead of just returning an error.  That means a
 161                          * larger temp buffer for cfs_get_environ(), then
 162                          * truncating the string at some separator to fit into
 163                          * the specified jobid_len.  Fix later if needed. */
 164                         static bool printed;
 165                         if (unlikely(!printed)) {
 166                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 167                                                    "for JobID buffer (%d)\n",
 168                                                    obd_jobid_var, jobid_len);
 169                                 printed = true;
 170                         }
 171                 } else {
 172                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 173                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 174                                "Get jobid for (%s) failed: rc = %d\n",
 175                                obd_jobid_var, rc);
 176                 }
 177         }
 178         RETURN(rc);
 179 }
 180 EXPORT_SYMBOL(lustre_get_jobid);
 181
 182 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 183                    size_t size, const char *file, int line)
 184 {
 185         if (ptr == NULL ||
 186             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 187                 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
 188                        ptr ? "force " :"", type, name, (__u64)size, file,
 189                        line);
 190                 CERROR(LPU64" total bytes and "LPU64" total pages "
 191                        "("LPU64" bytes) allocated by Lustre, "
 192                        "%d total bytes by LNET\n",
 193                        obd_memory_sum(),
 194                        obd_pages_sum() << PAGE_CACHE_SHIFT,
 195                        obd_pages_sum(),
 196                         atomic_read(&libcfs_kmemory));
 197                 return 1;
 198         }
 199         return 0;
 200 }
 201 EXPORT_SYMBOL(obd_alloc_fail);
 202
 203 int class_resolve_dev_name(__u32 len, const char *name)
 204 {
 205         int rc;
 206         int dev;
 207
 208         ENTRY;
 209         if (!len || !name) {
 210                 CERROR("No name passed,!\n");
 211                 GOTO(out, rc = -EINVAL);
 212         }
 213         if (name[len - 1] != 0) {
 214                 CERROR("Name not nul terminated!\n");
 215                 GOTO(out, rc = -EINVAL);
 216         }
 217
 218         CDEBUG(D_IOCTL, "device name %s\n", name);
 219         dev = class_name2dev(name);
 220         if (dev == -1) {
 221                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 222                 GOTO(out, rc = -EINVAL);
 223         }
 224
 225         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 226         rc = dev;
 227
 228 out:
 229         RETURN(rc);
 230 }
 231
 232 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 233 {
 234         char *buf = NULL;
 235         struct obd_ioctl_data *data;
 236         struct libcfs_debug_ioctl_data *debug_data;
 237         struct obd_device *obd = NULL;
 238         int err = 0, len = 0;
 239         ENTRY;
 240
 241         /* only for debugging */
 242         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 243                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 244                 libcfs_subsystem_debug = debug_data->subs;
 245                 libcfs_debug = debug_data->debug;
 246                 return 0;
 247         }
 248
 249         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 250         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 251                 CERROR("OBD ioctl: data error\n");
 252                 RETURN(-EINVAL);
 253         }
 254         data = (struct obd_ioctl_data *)buf;
 255
 256         switch (cmd) {
 257         case OBD_IOC_PROCESS_CFG: {
 258                 struct lustre_cfg *lcfg;
 259
 260                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 261                         CERROR("No config buffer passed!\n");
 262                         GOTO(out, err = -EINVAL);
 263                 }
 264                 OBD_ALLOC(lcfg, data->ioc_plen1);
 265                 if (lcfg == NULL)
 266                         GOTO(out, err = -ENOMEM);
 267                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 268                                          data->ioc_plen1);
 269                 if (!err)
 270                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 271                 if (!err)
 272                         err = class_process_config(lcfg);
 273
 274                 OBD_FREE(lcfg, data->ioc_plen1);
 275                 GOTO(out, err);
 276         }
 277
 278         case OBD_GET_VERSION:
 279                 if (!data->ioc_inlbuf1) {
 280                         CERROR("No buffer passed in ioctl\n");
 281                         GOTO(out, err = -EINVAL);
 282                 }
 283
 284                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 285                         CERROR("ioctl buffer too small to hold version\n");
 286                         GOTO(out, err = -EINVAL);
 287                 }
 288
 289                 memcpy(data->ioc_bulk, BUILD_VERSION,
 290                        strlen(BUILD_VERSION) + 1);
 291
 292                 err = obd_ioctl_popdata((void *)arg, data, len);
 293                 if (err)
 294                         err = -EFAULT;
 295                 GOTO(out, err);
 296
 297         case OBD_IOC_NAME2DEV: {
 298                 /* Resolve a device name.  This does not change the
 299                  * currently selected device.
 300                  */
 301                 int dev;
 302
 303                 dev = class_resolve_dev_name(data->ioc_inllen1,
 304                                              data->ioc_inlbuf1);
 305                 data->ioc_dev = dev;
 306                 if (dev < 0)
 307                         GOTO(out, err = -EINVAL);
 308
 309                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 310                 if (err)
 311                         err = -EFAULT;
 312                 GOTO(out, err);
 313         }
 314
 315         case OBD_IOC_UUID2DEV: {
 316                 /* Resolve a device uuid.  This does not change the
 317                  * currently selected device.
 318                  */
 319                 int dev;
 320                 struct obd_uuid uuid;
 321
 322                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 323                         CERROR("No UUID passed!\n");
 324                         GOTO(out, err = -EINVAL);
 325                 }
 326                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 327                         CERROR("UUID not NUL terminated!\n");
 328                         GOTO(out, err = -EINVAL);
 329                 }
 330
 331                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 332                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 333                 dev = class_uuid2dev(&uuid);
 334                 data->ioc_dev = dev;
 335                 if (dev == -1) {
 336                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 337                                data->ioc_inlbuf1);
 338                         GOTO(out, err = -EINVAL);
 339                 }
 340
 341                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 342                        dev);
 343                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 344                 if (err)
 345                         err = -EFAULT;
 346                 GOTO(out, err);
 347         }
 348
 349         case OBD_IOC_GETDEVICE: {
 350                 int     index = data->ioc_count;
 351                 char    *status, *str;
 352
 353                 if (!data->ioc_inlbuf1) {
 354                         CERROR("No buffer passed in ioctl\n");
 355                         GOTO(out, err = -EINVAL);
 356                 }
 357                 if (data->ioc_inllen1 < 128) {
 358                         CERROR("ioctl buffer too small to hold version\n");
 359                         GOTO(out, err = -EINVAL);
 360                 }
 361
 362                 obd = class_num2obd(index);
 363                 if (!obd)
 364                         GOTO(out, err = -ENOENT);
 365
 366                 if (obd->obd_stopping)
 367                         status = "ST";
 368                 else if (obd->obd_set_up)
 369                         status = "UP";
 370                 else if (obd->obd_attached)
 371                         status = "AT";
 372                 else
 373                         status = "--";
 374                 str = (char *)data->ioc_bulk;
 375                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 376                          (int)index, status, obd->obd_type->typ_name,
 377                          obd->obd_name, obd->obd_uuid.uuid,
 378                          atomic_read(&obd->obd_refcount));
 379                 err = obd_ioctl_popdata((void *)arg, data, len);
 380
 381                 GOTO(out, err = 0);
 382         }
 383
 384         }
 385
 386         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 387                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 388                         GOTO(out, err = -EINVAL);
 389                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 390                         GOTO(out, err = -EINVAL);
 391                 obd = class_name2obd(data->ioc_inlbuf4);
 392         } else if (data->ioc_dev < class_devno_max()) {
 393                 obd = class_num2obd(data->ioc_dev);
 394         } else {
 395                 CERROR("OBD ioctl: No device\n");
 396                 GOTO(out, err = -EINVAL);
 397         }
 398
 399         if (obd == NULL) {
 400                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 401                 GOTO(out, err = -EINVAL);
 402         }
 403         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 404
 405         if (!obd->obd_set_up || obd->obd_stopping) {
 406                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 407                 GOTO(out, err = -EINVAL);
 408         }
 409
 410         switch(cmd) {
 411         case OBD_IOC_NO_TRANSNO: {
 412                 if (!obd->obd_attached) {
 413                         CERROR("Device %d not attached\n", obd->obd_minor);
 414                         GOTO(out, err = -ENODEV);
 415                 }
 416                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 417                        obd->obd_name);
 418                 obd->obd_no_transno = 1;
 419                 GOTO(out, err = 0);
 420         }
 421
 422         default: {
 423                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 424                 if (err)
 425                         GOTO(out, err);
 426
 427                 err = obd_ioctl_popdata((void *)arg, data, len);
 428                 if (err)
 429                         err = -EFAULT;
 430                 GOTO(out, err);
 431         }
 432         }
 433
 434  out:
 435         if (buf)
 436                 obd_ioctl_freedata(buf, len);
 437         RETURN(err);
 438 } /* class_handle_ioctl */
 439
 440 #ifdef __KERNEL__
 441 extern struct miscdevice obd_psdev;
 442 #else
 443 struct miscdevice obd_psdev;
 444 #endif
 445
 446 #define OBD_INIT_CHECK
 447 #ifdef OBD_INIT_CHECK
 448 int obd_init_checks(void)
 449 {
 450         __u64 u64val, div64val;
 451         char buf[64];
 452         int len, ret = 0;
 453
 454         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 455
 456         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 457
 458         u64val = OBD_OBJECT_EOF;
 459         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 460         if (u64val != OBD_OBJECT_EOF) {
 461                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 462                        u64val, (int)sizeof(u64val));
 463                 ret = -EINVAL;
 464         }
 465         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 466         if (len != 18) {
 467                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 468                 ret = -EINVAL;
 469         }
 470
 471         div64val = OBD_OBJECT_EOF;
 472         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 473         if (u64val != OBD_OBJECT_EOF) {
 474                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 475                        u64val, (int)sizeof(u64val));
 476                 ret = -EOVERFLOW;
 477         }
 478         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 479                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 480                        u64val, (int)sizeof(u64val));
 481                 return -EOVERFLOW;
 482         }
 483         if (do_div(div64val, 256) != (u64val & 255)) {
 484                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 485                 return -EOVERFLOW;
 486         }
 487         if (u64val >> 8 != div64val) {
 488                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 489                        u64val, div64val, u64val >> 8);
 490                 return -EOVERFLOW;
 491         }
 492         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 493         if (len != 18) {
 494                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 495                 ret = -EINVAL;
 496         }
 497         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 498         if (len != 20) {
 499                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 500                 ret = -EINVAL;
 501         }
 502         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 503         if (len != 2) {
 504                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 505                 ret = -EINVAL;
 506         }
 507         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 508                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 509                       (__u64)PAGE_CACHE_SIZE);
 510                 ret = -EINVAL;
 511         }
 512
 513         return ret;
 514 }
 515 #else
 516 #define obd_init_checks() do {} while(0)
 517 #endif
 518
 519 extern spinlock_t obd_types_lock;
 520 extern int class_procfs_init(void);
 521 extern int class_procfs_clean(void);
 522
 523 #ifdef __KERNEL__
 524 static int __init init_obdclass(void)
 525 #else
 526 int init_obdclass(void)
 527 #endif
 528 {
 529         int i, err;
 530 #ifdef __KERNEL__
 531         int lustre_register_fs(void);
 532
 533         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 534                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 535 #endif
 536
 537         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 538
 539         spin_lock_init(&obd_types_lock);
 540         obd_zombie_impexp_init();
 541 #ifdef LPROCFS
 542         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 543                                          LPROCFS_STATS_FLAG_NONE |
 544                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 545         if (obd_memory == NULL) {
 546                 CERROR("kmalloc of 'obd_memory' failed\n");
 547                 RETURN(-ENOMEM);
 548         }
 549
 550         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 551                              LPROCFS_CNTR_AVGMINMAX,
 552                              "memused", "bytes");
 553         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 554                              LPROCFS_CNTR_AVGMINMAX,
 555                              "pagesused", "pages");
 556 #endif
 557         err = obd_init_checks();
 558         if (err == -EOVERFLOW)
 559                 return err;
 560
 561         class_init_uuidlist();
 562         err = class_handle_init();
 563         if (err)
 564                 return err;
 565
 566         CFS_INIT_LIST_HEAD(&obd_types);
 567
 568         err = misc_register(&obd_psdev);
 569         if (err) {
 570                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 571                 return err;
 572         }
 573
 574         /* This struct is already zeroed for us (static global) */
 575         for (i = 0; i < class_devno_max(); i++)
 576                 obd_devs[i] = NULL;
 577
 578         /* Default the dirty page cache cap to 1/2 of system memory.
 579          * For clients with less memory, a larger fraction is needed
 580          * for other purposes (mostly for BGL). */
 581         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 582                 obd_max_dirty_pages = totalram_pages / 4;
 583         else
 584                 obd_max_dirty_pages = totalram_pages / 2;
 585
 586         err = obd_init_caches();
 587         if (err)
 588                 return err;
 589 #ifdef __KERNEL__
 590         err = class_procfs_init();
 591         if (err)
 592                 return err;
 593 #endif
 594
 595         err = lu_global_init();
 596         if (err)
 597                 return err;
 598
 599         err = lu_capainfo_init();
 600         if (err)
 601                 return err;
 602
 603         err = cl_global_init();
 604         if (err != 0)
 605                 return err;
 606
 607 #if defined(__KERNEL__) && defined(HAVE_SERVER_SUPPORT)
 608         err = dt_global_init();
 609         if (err != 0)
 610                 return err;
 611
 612         err = lu_ucred_global_init();
 613         if (err != 0)
 614                 return err;
 615 #endif
 616
 617         err = llog_info_init();
 618         if (err)
 619                 return err;
 620
 621 #ifdef __KERNEL__
 622         err = lustre_register_fs();
 623 #endif
 624
 625         return err;
 626 }
 627
 628 void obd_update_maxusage(void)
 629 {
 630         __u64 max1, max2;
 631
 632         max1 = obd_pages_sum();
 633         max2 = obd_memory_sum();
 634
 635         spin_lock(&obd_updatemax_lock);
 636         if (max1 > obd_max_pages)
 637                 obd_max_pages = max1;
 638         if (max2 > obd_max_alloc)
 639                 obd_max_alloc = max2;
 640         spin_unlock(&obd_updatemax_lock);
 641 }
 642 EXPORT_SYMBOL(obd_update_maxusage);
 643
 644 #ifdef LPROCFS
 645 __u64 obd_memory_max(void)
 646 {
 647         __u64 ret;
 648
 649         spin_lock(&obd_updatemax_lock);
 650         ret = obd_max_alloc;
 651         spin_unlock(&obd_updatemax_lock);
 652
 653         return ret;
 654 }
 655 EXPORT_SYMBOL(obd_memory_max);
 656
 657 __u64 obd_pages_max(void)
 658 {
 659         __u64 ret;
 660
 661         spin_lock(&obd_updatemax_lock);
 662         ret = obd_max_pages;
 663         spin_unlock(&obd_updatemax_lock);
 664
 665         return ret;
 666 }
 667 EXPORT_SYMBOL(obd_pages_max);
 668 #endif
 669
 670 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 671  * ifdef to the end of the file to cover module and versioning goo.*/
 672 #ifdef __KERNEL__
 673 static void cleanup_obdclass(void)
 674 {
 675         int lustre_unregister_fs(void);
 676         __u64 memory_leaked, pages_leaked;
 677         __u64 memory_max, pages_max;
 678         ENTRY;
 679
 680         lustre_unregister_fs();
 681
 682         misc_deregister(&obd_psdev);
 683         llog_info_fini();
 684 #ifdef HAVE_SERVER_SUPPORT
 685         lu_ucred_global_fini();
 686         dt_global_fini();
 687 #endif
 688         cl_global_fini();
 689         lu_capainfo_fini();
 690         lu_global_fini();
 691
 692         obd_cleanup_caches();
 693         obd_sysctl_clean();
 694
 695         class_procfs_clean();
 696
 697         class_handle_cleanup();
 698         class_exit_uuidlist();
 699         obd_zombie_impexp_stop();
 700
 701         memory_leaked = obd_memory_sum();
 702         pages_leaked = obd_pages_sum();
 703
 704         memory_max = obd_memory_max();
 705         pages_max = obd_pages_max();
 706
 707         lprocfs_free_stats(&obd_memory);
 708         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 709                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 710                memory_max, memory_leaked);
 711         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 712                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 713                pages_max, pages_leaked);
 714
 715         EXIT;
 716 }
 717
 718 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 719 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 720 MODULE_LICENSE("GPL");
 721
 722 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 723 #endif