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