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 static inline void obd_data2conn(struct lustre_handle *conn,
 204                                  struct obd_ioctl_data *data)
 205 {
 206         memset(conn, 0, sizeof *conn);
 207         conn->cookie = data->ioc_cookie;
 208 }
 209
 210 static inline void obd_conn2data(struct obd_ioctl_data *data,
 211                                  struct lustre_handle *conn)
 212 {
 213         data->ioc_cookie = conn->cookie;
 214 }
 215
 216 int class_resolve_dev_name(__u32 len, const char *name)
 217 {
 218         int rc;
 219         int dev;
 220
 221         ENTRY;
 222         if (!len || !name) {
 223                 CERROR("No name passed,!\n");
 224                 GOTO(out, rc = -EINVAL);
 225         }
 226         if (name[len - 1] != 0) {
 227                 CERROR("Name not nul terminated!\n");
 228                 GOTO(out, rc = -EINVAL);
 229         }
 230
 231         CDEBUG(D_IOCTL, "device name %s\n", name);
 232         dev = class_name2dev(name);
 233         if (dev == -1) {
 234                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 235                 GOTO(out, rc = -EINVAL);
 236         }
 237
 238         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 239         rc = dev;
 240
 241 out:
 242         RETURN(rc);
 243 }
 244
 245 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 246 {
 247         char *buf = NULL;
 248         struct obd_ioctl_data *data;
 249         struct libcfs_debug_ioctl_data *debug_data;
 250         struct obd_device *obd = NULL;
 251         int err = 0, len = 0;
 252         ENTRY;
 253
 254         /* only for debugging */
 255         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 256                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 257                 libcfs_subsystem_debug = debug_data->subs;
 258                 libcfs_debug = debug_data->debug;
 259                 return 0;
 260         }
 261
 262         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 263         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 264                 CERROR("OBD ioctl: data error\n");
 265                 RETURN(-EINVAL);
 266         }
 267         data = (struct obd_ioctl_data *)buf;
 268
 269         switch (cmd) {
 270         case OBD_IOC_PROCESS_CFG: {
 271                 struct lustre_cfg *lcfg;
 272
 273                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 274                         CERROR("No config buffer passed!\n");
 275                         GOTO(out, err = -EINVAL);
 276                 }
 277                 OBD_ALLOC(lcfg, data->ioc_plen1);
 278                 if (lcfg == NULL)
 279                         GOTO(out, err = -ENOMEM);
 280                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 281                                          data->ioc_plen1);
 282                 if (!err)
 283                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 284                 if (!err)
 285                         err = class_process_config(lcfg);
 286
 287                 OBD_FREE(lcfg, data->ioc_plen1);
 288                 GOTO(out, err);
 289         }
 290
 291         case OBD_GET_VERSION:
 292                 if (!data->ioc_inlbuf1) {
 293                         CERROR("No buffer passed in ioctl\n");
 294                         GOTO(out, err = -EINVAL);
 295                 }
 296
 297                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 298                         CERROR("ioctl buffer too small to hold version\n");
 299                         GOTO(out, err = -EINVAL);
 300                 }
 301
 302                 memcpy(data->ioc_bulk, BUILD_VERSION,
 303                        strlen(BUILD_VERSION) + 1);
 304
 305                 err = obd_ioctl_popdata((void *)arg, data, len);
 306                 if (err)
 307                         err = -EFAULT;
 308                 GOTO(out, err);
 309
 310         case OBD_IOC_NAME2DEV: {
 311                 /* Resolve a device name.  This does not change the
 312                  * currently selected device.
 313                  */
 314                 int dev;
 315
 316                 dev = class_resolve_dev_name(data->ioc_inllen1,
 317                                              data->ioc_inlbuf1);
 318                 data->ioc_dev = dev;
 319                 if (dev < 0)
 320                         GOTO(out, err = -EINVAL);
 321
 322                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 323                 if (err)
 324                         err = -EFAULT;
 325                 GOTO(out, err);
 326         }
 327
 328         case OBD_IOC_UUID2DEV: {
 329                 /* Resolve a device uuid.  This does not change the
 330                  * currently selected device.
 331                  */
 332                 int dev;
 333                 struct obd_uuid uuid;
 334
 335                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 336                         CERROR("No UUID passed!\n");
 337                         GOTO(out, err = -EINVAL);
 338                 }
 339                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 340                         CERROR("UUID not NUL terminated!\n");
 341                         GOTO(out, err = -EINVAL);
 342                 }
 343
 344                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 345                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 346                 dev = class_uuid2dev(&uuid);
 347                 data->ioc_dev = dev;
 348                 if (dev == -1) {
 349                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 350                                data->ioc_inlbuf1);
 351                         GOTO(out, err = -EINVAL);
 352                 }
 353
 354                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 355                        dev);
 356                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 357                 if (err)
 358                         err = -EFAULT;
 359                 GOTO(out, err);
 360         }
 361
 362         case OBD_IOC_GETDEVICE: {
 363                 int     index = data->ioc_count;
 364                 char    *status, *str;
 365
 366                 if (!data->ioc_inlbuf1) {
 367                         CERROR("No buffer passed in ioctl\n");
 368                         GOTO(out, err = -EINVAL);
 369                 }
 370                 if (data->ioc_inllen1 < 128) {
 371                         CERROR("ioctl buffer too small to hold version\n");
 372                         GOTO(out, err = -EINVAL);
 373                 }
 374
 375                 obd = class_num2obd(index);
 376                 if (!obd)
 377                         GOTO(out, err = -ENOENT);
 378
 379                 if (obd->obd_stopping)
 380                         status = "ST";
 381                 else if (obd->obd_set_up)
 382                         status = "UP";
 383                 else if (obd->obd_attached)
 384                         status = "AT";
 385                 else
 386                         status = "--";
 387                 str = (char *)data->ioc_bulk;
 388                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 389                          (int)index, status, obd->obd_type->typ_name,
 390                          obd->obd_name, obd->obd_uuid.uuid,
 391                          atomic_read(&obd->obd_refcount));
 392                 err = obd_ioctl_popdata((void *)arg, data, len);
 393
 394                 GOTO(out, err = 0);
 395         }
 396
 397         }
 398
 399         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 400                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 401                         GOTO(out, err = -EINVAL);
 402                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 403                         GOTO(out, err = -EINVAL);
 404                 obd = class_name2obd(data->ioc_inlbuf4);
 405         } else if (data->ioc_dev < class_devno_max()) {
 406                 obd = class_num2obd(data->ioc_dev);
 407         } else {
 408                 CERROR("OBD ioctl: No device\n");
 409                 GOTO(out, err = -EINVAL);
 410         }
 411
 412         if (obd == NULL) {
 413                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 414                 GOTO(out, err = -EINVAL);
 415         }
 416         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 417
 418         if (!obd->obd_set_up || obd->obd_stopping) {
 419                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 420                 GOTO(out, err = -EINVAL);
 421         }
 422
 423         switch(cmd) {
 424         case OBD_IOC_NO_TRANSNO: {
 425                 if (!obd->obd_attached) {
 426                         CERROR("Device %d not attached\n", obd->obd_minor);
 427                         GOTO(out, err = -ENODEV);
 428                 }
 429                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 430                        obd->obd_name);
 431                 obd->obd_no_transno = 1;
 432                 GOTO(out, err = 0);
 433         }
 434
 435         default: {
 436                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 437                 if (err)
 438                         GOTO(out, err);
 439
 440                 err = obd_ioctl_popdata((void *)arg, data, len);
 441                 if (err)
 442                         err = -EFAULT;
 443                 GOTO(out, err);
 444         }
 445         }
 446
 447  out:
 448         if (buf)
 449                 obd_ioctl_freedata(buf, len);
 450         RETURN(err);
 451 } /* class_handle_ioctl */
 452
 453 #ifdef __KERNEL__
 454 extern struct miscdevice obd_psdev;
 455 #else
 456 struct miscdevice obd_psdev;
 457 #endif
 458
 459 #define OBD_INIT_CHECK
 460 #ifdef OBD_INIT_CHECK
 461 int obd_init_checks(void)
 462 {
 463         __u64 u64val, div64val;
 464         char buf[64];
 465         int len, ret = 0;
 466
 467         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 468
 469         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 470
 471         u64val = 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 = -EINVAL;
 477         }
 478         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 479         if (len != 18) {
 480                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 481                 ret = -EINVAL;
 482         }
 483
 484         div64val = OBD_OBJECT_EOF;
 485         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 486         if (u64val != OBD_OBJECT_EOF) {
 487                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 488                        u64val, (int)sizeof(u64val));
 489                 ret = -EOVERFLOW;
 490         }
 491         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 492                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 493                        u64val, (int)sizeof(u64val));
 494                 return -EOVERFLOW;
 495         }
 496         if (do_div(div64val, 256) != (u64val & 255)) {
 497                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 498                 return -EOVERFLOW;
 499         }
 500         if (u64val >> 8 != div64val) {
 501                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 502                        u64val, div64val, u64val >> 8);
 503                 return -EOVERFLOW;
 504         }
 505         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 506         if (len != 18) {
 507                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 508                 ret = -EINVAL;
 509         }
 510         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 511         if (len != 20) {
 512                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 513                 ret = -EINVAL;
 514         }
 515         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 516         if (len != 2) {
 517                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 518                 ret = -EINVAL;
 519         }
 520         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 521                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 522                       (__u64)PAGE_CACHE_SIZE);
 523                 ret = -EINVAL;
 524         }
 525
 526         return ret;
 527 }
 528 #else
 529 #define obd_init_checks() do {} while(0)
 530 #endif
 531
 532 extern spinlock_t obd_types_lock;
 533 extern int class_procfs_init(void);
 534 extern int class_procfs_clean(void);
 535
 536 #ifdef __KERNEL__
 537 static int __init init_obdclass(void)
 538 #else
 539 int init_obdclass(void)
 540 #endif
 541 {
 542         int i, err;
 543 #ifdef __KERNEL__
 544         int lustre_register_fs(void);
 545
 546         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 547                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 548 #endif
 549
 550         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 551
 552         spin_lock_init(&obd_types_lock);
 553         obd_zombie_impexp_init();
 554 #ifdef LPROCFS
 555         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 556                                          LPROCFS_STATS_FLAG_NONE |
 557                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 558         if (obd_memory == NULL) {
 559                 CERROR("kmalloc of 'obd_memory' failed\n");
 560                 RETURN(-ENOMEM);
 561         }
 562
 563         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 564                              LPROCFS_CNTR_AVGMINMAX,
 565                              "memused", "bytes");
 566         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 567                              LPROCFS_CNTR_AVGMINMAX,
 568                              "pagesused", "pages");
 569 #endif
 570         err = obd_init_checks();
 571         if (err == -EOVERFLOW)
 572                 return err;
 573
 574         class_init_uuidlist();
 575         err = class_handle_init();
 576         if (err)
 577                 return err;
 578
 579         CFS_INIT_LIST_HEAD(&obd_types);
 580
 581         err = misc_register(&obd_psdev);
 582         if (err) {
 583                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 584                 return err;
 585         }
 586
 587         /* This struct is already zeroed for us (static global) */
 588         for (i = 0; i < class_devno_max(); i++)
 589                 obd_devs[i] = NULL;
 590
 591         /* Default the dirty page cache cap to 1/2 of system memory.
 592          * For clients with less memory, a larger fraction is needed
 593          * for other purposes (mostly for BGL). */
 594         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 595                 obd_max_dirty_pages = totalram_pages / 4;
 596         else
 597                 obd_max_dirty_pages = totalram_pages / 2;
 598
 599         err = obd_init_caches();
 600         if (err)
 601                 return err;
 602 #ifdef __KERNEL__
 603         err = class_procfs_init();
 604         if (err)
 605                 return err;
 606 #endif
 607
 608         err = lu_global_init();
 609         if (err)
 610                 return err;
 611
 612         err = lu_capainfo_init();
 613         if (err)
 614                 return err;
 615
 616         err = cl_global_init();
 617         if (err != 0)
 618                 return err;
 619
 620 #if defined(__KERNEL__) && defined(HAVE_SERVER_SUPPORT)
 621         err = dt_global_init();
 622         if (err != 0)
 623                 return err;
 624
 625         err = lu_ucred_global_init();
 626         if (err != 0)
 627                 return err;
 628 #endif
 629
 630         err = llog_info_init();
 631         if (err)
 632                 return err;
 633
 634 #ifdef __KERNEL__
 635         err = lustre_register_fs();
 636 #endif
 637
 638         return err;
 639 }
 640
 641 void obd_update_maxusage(void)
 642 {
 643         __u64 max1, max2;
 644
 645         max1 = obd_pages_sum();
 646         max2 = obd_memory_sum();
 647
 648         spin_lock(&obd_updatemax_lock);
 649         if (max1 > obd_max_pages)
 650                 obd_max_pages = max1;
 651         if (max2 > obd_max_alloc)
 652                 obd_max_alloc = max2;
 653         spin_unlock(&obd_updatemax_lock);
 654 }
 655 EXPORT_SYMBOL(obd_update_maxusage);
 656
 657 #ifdef LPROCFS
 658 __u64 obd_memory_max(void)
 659 {
 660         __u64 ret;
 661
 662         spin_lock(&obd_updatemax_lock);
 663         ret = obd_max_alloc;
 664         spin_unlock(&obd_updatemax_lock);
 665
 666         return ret;
 667 }
 668 EXPORT_SYMBOL(obd_memory_max);
 669
 670 __u64 obd_pages_max(void)
 671 {
 672         __u64 ret;
 673
 674         spin_lock(&obd_updatemax_lock);
 675         ret = obd_max_pages;
 676         spin_unlock(&obd_updatemax_lock);
 677
 678         return ret;
 679 }
 680 EXPORT_SYMBOL(obd_pages_max);
 681 #endif
 682
 683 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 684  * ifdef to the end of the file to cover module and versioning goo.*/
 685 #ifdef __KERNEL__
 686 static void cleanup_obdclass(void)
 687 {
 688         int i;
 689         int lustre_unregister_fs(void);
 690         __u64 memory_leaked, pages_leaked;
 691         __u64 memory_max, pages_max;
 692         ENTRY;
 693
 694         lustre_unregister_fs();
 695
 696         misc_deregister(&obd_psdev);
 697         for (i = 0; i < class_devno_max(); i++) {
 698                 struct obd_device *obd = class_num2obd(i);
 699                 if (obd && obd->obd_set_up &&
 700                     OBT(obd) && OBP(obd, detach)) {
 701                         /* XXX should this call generic detach otherwise? */
 702                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 703                         OBP(obd, detach)(obd);
 704                 }
 705         }
 706         llog_info_fini();
 707 #ifdef HAVE_SERVER_SUPPORT
 708         lu_ucred_global_fini();
 709         dt_global_fini();
 710 #endif
 711         cl_global_fini();
 712         lu_capainfo_fini();
 713         lu_global_fini();
 714
 715         obd_cleanup_caches();
 716         obd_sysctl_clean();
 717
 718         class_procfs_clean();
 719
 720         class_handle_cleanup();
 721         class_exit_uuidlist();
 722         obd_zombie_impexp_stop();
 723
 724         memory_leaked = obd_memory_sum();
 725         pages_leaked = obd_pages_sum();
 726
 727         memory_max = obd_memory_max();
 728         pages_max = obd_pages_max();
 729
 730         lprocfs_free_stats(&obd_memory);
 731         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 732                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 733                memory_max, memory_leaked);
 734         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 735                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 736                pages_max, pages_leaked);
 737
 738         EXIT;
 739 }
 740
 741 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 742 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 743 MODULE_LICENSE("GPL");
 744
 745 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 746 #endif