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