lustre/obdclass/class_obd.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 EXPORT_SYMTAB
  39 # define EXPORT_SYMTAB
  40 #endif
  41 #ifndef __KERNEL__
  42 # include <liblustre.h>
  43 #endif
  44
  45 #include <obd_support.h>
  46 #include <obd_class.h>
  47 #include <lnet/lnetctl.h>
  48 #include <lustre_debug.h>
  49 #include <lprocfs_status.h>
  50 #include <lustre/lustre_build_version.h>
  51 #include <libcfs/list.h>
  52 #include "llog_internal.h"
  53
  54 #ifndef __KERNEL__
  55 /* liblustre workaround */
  56 atomic_t libcfs_kmemory = {0};
  57 #endif
  58
  59 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  60 struct list_head obd_types;
  61 spinlock_t obd_dev_lock = SPIN_LOCK_UNLOCKED;
  62 cfs_mem_cache_t *obd_lvfs_ctxt_cache;
  63
  64 /* The following are visible and mutable through /proc/sys/lustre/. */
  65 unsigned int obd_debug_peer_on_timeout;
  66 unsigned int obd_dump_on_timeout;
  67 unsigned int obd_dump_on_eviction;
  68 unsigned int obd_max_dirty_pages = 256;
  69 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  70 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  71 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  72 unsigned int at_min = 0;
  73 #ifdef HAVE_AT_SUPPORT
  74 unsigned int at_max = 600;
  75 #else
  76 unsigned int at_max = 0;
  77 #endif
  78 unsigned int at_history = 600;
  79 int at_early_margin = 5;
  80 int at_extra = 30;
  81
  82 atomic_t obd_dirty_pages;
  83 cfs_waitq_t obd_race_waitq;
  84 int obd_race_state;
  85
  86 #ifdef __KERNEL__
  87 unsigned int obd_print_fail_loc(void)
  88 {
  89         CWARN("obd_fail_loc = %x\n", obd_fail_loc);
  90         return obd_fail_loc;
  91 }
  92
  93 void obd_set_fail_loc(unsigned int fl)
  94 {
  95         obd_fail_loc = fl;
  96 }
  97 #endif
  98
  99 static inline void obd_data2conn(struct lustre_handle *conn,
 100                                  struct obd_ioctl_data *data)
 101 {
 102         memset(conn, 0, sizeof *conn);
 103         conn->cookie = data->ioc_cookie;
 104 }
 105
 106 static inline void obd_conn2data(struct obd_ioctl_data *data,
 107                                  struct lustre_handle *conn)
 108 {
 109         data->ioc_cookie = conn->cookie;
 110 }
 111
 112 int class_resolve_dev_name(__u32 len, const char *name)
 113 {
 114         int rc;
 115         int dev;
 116
 117         ENTRY;
 118         if (!len || !name) {
 119                 CERROR("No name passed,!\n");
 120                 GOTO(out, rc = -EINVAL);
 121         }
 122         if (name[len - 1] != 0) {
 123                 CERROR("Name not nul terminated!\n");
 124                 GOTO(out, rc = -EINVAL);
 125         }
 126
 127         CDEBUG(D_IOCTL, "device name %s\n", name);
 128         dev = class_name2dev(name);
 129         if (dev == -1) {
 130                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 131                 GOTO(out, rc = -EINVAL);
 132         }
 133
 134         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 135         rc = dev;
 136
 137 out:
 138         RETURN(rc);
 139 }
 140
 141 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 142 {
 143         char *buf = NULL;
 144         struct obd_ioctl_data *data;
 145         struct libcfs_debug_ioctl_data *debug_data;
 146         struct obd_device *obd = NULL;
 147         int err = 0, len = 0;
 148         ENTRY;
 149
 150         /* only for debugging */
 151         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 152                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 153                 libcfs_subsystem_debug = debug_data->subs;
 154                 libcfs_debug = debug_data->debug;
 155                 return 0;
 156         }
 157
 158         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 159         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 160                 CERROR("OBD ioctl: data error\n");
 161                 GOTO(out, err = -EINVAL);
 162         }
 163         data = (struct obd_ioctl_data *)buf;
 164
 165         switch (cmd) {
 166         case OBD_IOC_PROCESS_CFG: {
 167                 struct lustre_cfg *lcfg;
 168
 169                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 170                         CERROR("No config buffer passed!\n");
 171                         GOTO(out, err = -EINVAL);
 172                 }
 173                 OBD_ALLOC(lcfg, data->ioc_plen1);
 174                 if (lcfg == NULL)
 175                         GOTO(out, err = -ENOMEM);
 176                 err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1);
 177                 if (!err)
 178                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 179                 if (!err)
 180                         err = class_process_config(lcfg);
 181                 OBD_FREE(lcfg, data->ioc_plen1);
 182                 GOTO(out, err);
 183         }
 184
 185         case OBD_GET_VERSION:
 186                 if (!data->ioc_inlbuf1) {
 187                         CERROR("No buffer passed in ioctl\n");
 188                         GOTO(out, err = -EINVAL);
 189                 }
 190
 191                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 192                         CERROR("ioctl buffer too small to hold version\n");
 193                         GOTO(out, err = -EINVAL);
 194                 }
 195
 196                 memcpy(data->ioc_bulk, BUILD_VERSION,
 197                        strlen(BUILD_VERSION) + 1);
 198
 199                 err = obd_ioctl_popdata((void *)arg, data, len);
 200                 if (err)
 201                         err = -EFAULT;
 202                 GOTO(out, err);
 203
 204         case OBD_IOC_NAME2DEV: {
 205                 /* Resolve a device name.  This does not change the
 206                  * currently selected device.
 207                  */
 208                 int dev;
 209
 210                 dev = class_resolve_dev_name(data->ioc_inllen1,
 211                                              data->ioc_inlbuf1);
 212                 data->ioc_dev = dev;
 213                 if (dev < 0)
 214                         GOTO(out, err = -EINVAL);
 215
 216                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 217                 if (err)
 218                         err = -EFAULT;
 219                 GOTO(out, err);
 220         }
 221
 222         case OBD_IOC_UUID2DEV: {
 223                 /* Resolve a device uuid.  This does not change the
 224                  * currently selected device.
 225                  */
 226                 int dev;
 227                 struct obd_uuid uuid;
 228
 229                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 230                         CERROR("No UUID passed!\n");
 231                         GOTO(out, err = -EINVAL);
 232                 }
 233                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 234                         CERROR("UUID not NUL terminated!\n");
 235                         GOTO(out, err = -EINVAL);
 236                 }
 237
 238                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 239                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 240                 dev = class_uuid2dev(&uuid);
 241                 data->ioc_dev = dev;
 242                 if (dev == -1) {
 243                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 244                                data->ioc_inlbuf1);
 245                         GOTO(out, err = -EINVAL);
 246                 }
 247
 248                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 249                        dev);
 250                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 251                 if (err)
 252                         err = -EFAULT;
 253                 GOTO(out, err);
 254         }
 255
 256         case OBD_IOC_CLOSE_UUID: {
 257                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 258                        data->ioc_inlbuf1);
 259                 GOTO(out, err = 0);
 260         }
 261
 262         case OBD_IOC_GETDEVICE: {
 263                 int     index = data->ioc_count;
 264                 char    *status, *str;
 265
 266                 if (!data->ioc_inlbuf1) {
 267                         CERROR("No buffer passed in ioctl\n");
 268                         GOTO(out, err = -EINVAL);
 269                 }
 270                 if (data->ioc_inllen1 < 128) {
 271                         CERROR("ioctl buffer too small to hold version\n");
 272                         GOTO(out, err = -EINVAL);
 273                 }
 274
 275                 obd = class_num2obd(index);
 276                 if (!obd)
 277                         GOTO(out, err = -ENOENT);
 278
 279                 if (obd->obd_stopping)
 280                         status = "ST";
 281                 else if (obd->obd_set_up)
 282                         status = "UP";
 283                 else if (obd->obd_attached)
 284                         status = "AT";
 285                 else
 286                         status = "--";
 287                 str = (char *)data->ioc_bulk;
 288                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 289                          (int)index, status, obd->obd_type->typ_name,
 290                          obd->obd_name, obd->obd_uuid.uuid,
 291                          atomic_read(&obd->obd_refcount));
 292                 err = obd_ioctl_popdata((void *)arg, data, len);
 293
 294                 GOTO(out, err = 0);
 295         }
 296
 297         }
 298
 299         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 300                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 301                         GOTO(out, err = -EINVAL);
 302                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 303                         GOTO(out, err = -EINVAL);
 304                 obd = class_name2obd(data->ioc_inlbuf4);
 305         } else if (data->ioc_dev < class_devno_max()) {
 306                 obd = class_num2obd(data->ioc_dev);
 307         } else {
 308                 CERROR("OBD ioctl: No device\n");
 309                 GOTO(out, err = -EINVAL);
 310         }
 311
 312         if (obd == NULL) {
 313                 if (data->ioc_dev == OBD_DEV_BY_DEVNAME)
 314                         CERROR("OBD ioctl: No Device %s\n", data->ioc_inlbuf4);
 315                 else
 316                         CERROR("OBD ioctl: No Device %d\n", data->ioc_dev);
 317                 GOTO(out, err = -EINVAL);
 318         }
 319         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 320
 321         if (!obd->obd_set_up || obd->obd_stopping) {
 322                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 323                 GOTO(out, err = -EINVAL);
 324         }
 325
 326         switch(cmd) {
 327         case OBD_IOC_NO_TRANSNO: {
 328                 if (!obd->obd_attached) {
 329                         CERROR("Device %d not attached\n", obd->obd_minor);
 330                         GOTO(out, err = -ENODEV);
 331                 }
 332                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 333                        obd->obd_name);
 334                 spin_lock_bh(&obd->obd_processing_task_lock);
 335                 obd->obd_no_transno = 1;
 336                 spin_unlock_bh(&obd->obd_processing_task_lock);
 337                 GOTO(out, err = 0);
 338         }
 339
 340         default: {
 341                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 342                 if (err)
 343                         GOTO(out, err);
 344
 345                 err = obd_ioctl_popdata((void *)arg, data, len);
 346                 if (err)
 347                         err = -EFAULT;
 348                 GOTO(out, err);
 349         }
 350         }
 351
 352  out:
 353         if (buf)
 354                 obd_ioctl_freedata(buf, len);
 355         RETURN(err);
 356 } /* class_handle_ioctl */
 357
 358
 359
 360 #ifdef __KERNEL__
 361 extern cfs_psdev_t obd_psdev;
 362 #else
 363 void *obd_psdev = NULL;
 364 #endif
 365
 366 EXPORT_SYMBOL(obd_devs);
 367 EXPORT_SYMBOL(obd_lvfs_ctxt_cache);
 368 EXPORT_SYMBOL(obd_print_fail_loc);
 369 EXPORT_SYMBOL(obd_race_waitq);
 370 EXPORT_SYMBOL(obd_race_state);
 371 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 372 EXPORT_SYMBOL(obd_dump_on_timeout);
 373 EXPORT_SYMBOL(obd_dump_on_eviction);
 374 EXPORT_SYMBOL(obd_timeout);
 375 EXPORT_SYMBOL(ldlm_timeout);
 376 EXPORT_SYMBOL(obd_max_dirty_pages);
 377 EXPORT_SYMBOL(obd_dirty_pages);
 378 EXPORT_SYMBOL(at_min);
 379 EXPORT_SYMBOL(at_max);
 380 EXPORT_SYMBOL(at_extra);
 381 EXPORT_SYMBOL(at_early_margin);
 382 EXPORT_SYMBOL(at_history);
 383 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 384
 385 EXPORT_SYMBOL(proc_lustre_root);
 386
 387 EXPORT_SYMBOL(class_register_type);
 388 EXPORT_SYMBOL(class_unregister_type);
 389 EXPORT_SYMBOL(class_get_type);
 390 EXPORT_SYMBOL(class_put_type);
 391 EXPORT_SYMBOL(class_name2dev);
 392 EXPORT_SYMBOL(class_name2obd);
 393 EXPORT_SYMBOL(class_uuid2dev);
 394 EXPORT_SYMBOL(class_uuid2obd);
 395 EXPORT_SYMBOL(class_find_client_obd);
 396 EXPORT_SYMBOL(class_find_client_notype);
 397 EXPORT_SYMBOL(class_devices_in_group);
 398 EXPORT_SYMBOL(class_conn2export);
 399 EXPORT_SYMBOL(class_exp2obd);
 400 EXPORT_SYMBOL(class_conn2obd);
 401 EXPORT_SYMBOL(class_exp2cliimp);
 402 EXPORT_SYMBOL(class_conn2cliimp);
 403 EXPORT_SYMBOL(class_disconnect);
 404 EXPORT_SYMBOL(class_num2obd);
 405
 406 /* uuid.c */
 407 EXPORT_SYMBOL(class_uuid_unparse);
 408 EXPORT_SYMBOL(lustre_uuid_to_peer);
 409
 410 EXPORT_SYMBOL(class_handle_hash);
 411 EXPORT_SYMBOL(class_handle_unhash);
 412 EXPORT_SYMBOL(class_handle2object);
 413 EXPORT_SYMBOL(class_handle_free_cb);
 414
 415 /* obd_config.c */
 416 EXPORT_SYMBOL(class_incref);
 417 EXPORT_SYMBOL(class_decref);
 418 EXPORT_SYMBOL(class_get_profile);
 419 EXPORT_SYMBOL(class_del_profile);
 420 EXPORT_SYMBOL(class_del_profiles);
 421 EXPORT_SYMBOL(class_process_config);
 422 EXPORT_SYMBOL(class_process_proc_param);
 423 EXPORT_SYMBOL(class_config_parse_llog);
 424 EXPORT_SYMBOL(class_config_dump_llog);
 425 EXPORT_SYMBOL(class_attach);
 426 EXPORT_SYMBOL(class_setup);
 427 EXPORT_SYMBOL(class_cleanup);
 428 EXPORT_SYMBOL(class_detach);
 429 EXPORT_SYMBOL(class_manual_cleanup);
 430
 431 #define OBD_INIT_CHECK
 432 #ifdef OBD_INIT_CHECK
 433 int obd_init_checks(void)
 434 {
 435         __u64 u64val, div64val;
 436         char buf[64];
 437         int len, ret = 0;
 438
 439         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s, LPSZ=%s, LPSSZ=%s\n",
 440                LPU64, LPD64, LPX64, LPSZ, LPSSZ);
 441
 442         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 443
 444         u64val = OBD_OBJECT_EOF;
 445         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 446         if (u64val != OBD_OBJECT_EOF) {
 447                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 448                        u64val, (int)sizeof(u64val));
 449                 ret = -EINVAL;
 450         }
 451         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 452         if (len != 18) {
 453                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 454                 ret = -EINVAL;
 455         }
 456
 457         div64val = OBD_OBJECT_EOF;
 458         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 459         if (u64val != OBD_OBJECT_EOF) {
 460                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 461                        u64val, (int)sizeof(u64val));
 462                 ret = -EOVERFLOW;
 463         }
 464         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 465                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 466                        u64val, (int)sizeof(u64val));
 467                 return -EOVERFLOW;
 468         }
 469         if (do_div(div64val, 256) != (u64val & 255)) {
 470                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 471                 return -EOVERFLOW;
 472         }
 473         if (u64val >> 8 != div64val) {
 474                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 475                        u64val, div64val, u64val >> 8);
 476                 return -EOVERFLOW;
 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         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 484         if (len != 20) {
 485                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 486                 ret = -EINVAL;
 487         }
 488         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 489         if (len != 2) {
 490                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 491                 ret = -EINVAL;
 492         }
 493         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 494                 CWARN("mask failed: u64val "LPU64" >= %lu\n", u64val,
 495                       (unsigned long)CFS_PAGE_SIZE);
 496                 ret = -EINVAL;
 497         }
 498
 499         return ret;
 500 }
 501 #else
 502 #define obd_init_checks() do {} while(0)
 503 #endif
 504
 505 extern spinlock_t obd_types_lock;
 506 extern int class_procfs_init(void);
 507 extern int class_procfs_clean(void);
 508
 509 #ifdef __KERNEL__
 510 static int __init init_obdclass(void)
 511 #else
 512 int init_obdclass(void)
 513 #endif
 514 {
 515         int i, err;
 516 #ifdef __KERNEL__
 517         int lustre_register_fs(void);
 518 #endif
 519
 520         LCONSOLE_INFO("OBD class driver, http://www.lustre.org/\n");
 521         LCONSOLE_INFO("    Lustre Version: "LUSTRE_VERSION_STRING"\n");
 522         LCONSOLE_INFO("    Build Version: "BUILD_VERSION"\n");
 523
 524         spin_lock_init(&obd_types_lock);
 525         cfs_waitq_init(&obd_race_waitq);
 526         obd_zombie_impexp_init();
 527 #ifdef LPROCFS
 528         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 529                                          LPROCFS_STATS_FLAG_NONE);
 530         if (obd_memory == NULL) {
 531                 CERROR("kmalloc of 'obd_memory' failed\n");
 532                 RETURN(-ENOMEM);
 533         }
 534
 535         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 536                              LPROCFS_CNTR_AVGMINMAX,
 537                              "memused", "bytes");
 538         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 539                              LPROCFS_CNTR_AVGMINMAX,
 540                              "pagesused", "pages");
 541 #endif
 542         obd_lvfs_ctxt_cache = cfs_mem_cache_create("obd_lvfs_ctxt_cache",
 543                 sizeof(struct lvfs_run_ctxt), 0, 0);
 544         if (obd_lvfs_ctxt_cache == NULL)
 545                 RETURN(-ENOMEM);
 546
 547         err = obd_init_checks();
 548         if (err == -EOVERFLOW)
 549                 return err;
 550
 551         class_init_uuidlist();
 552         err = class_handle_init();
 553         if (err)
 554                 return err;
 555
 556         spin_lock_init(&obd_dev_lock);
 557         CFS_INIT_LIST_HEAD(&obd_types);
 558
 559         err = cfs_psdev_register(&obd_psdev);
 560         if (err) {
 561                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 562                 return err;
 563         }
 564
 565         /* This struct is already zerod for us (static global) */
 566         for (i = 0; i < class_devno_max(); i++)
 567                 obd_devs[i] = NULL;
 568
 569         /* Default the dirty page cache cap to 1/2 of system memory.
 570          * For clients with less memory, a larger fraction is needed
 571          * for other purposes (mostly for BGL). */
 572         if (num_physpages <= 512 << (20 - CFS_PAGE_SHIFT))
 573                 obd_max_dirty_pages = num_physpages / 4;
 574         else
 575                 obd_max_dirty_pages = num_physpages / 2;
 576
 577         err = obd_init_caches();
 578         if (err)
 579                 return err;
 580 #ifdef __KERNEL__
 581         err = class_procfs_init();
 582         if (err)
 583                 return err;
 584         err = lustre_register_fs();
 585 #endif
 586
 587         return err;
 588 }
 589
 590 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 591  * ifdef to the end of the file to cover module and versioning goo.*/
 592 #ifdef __KERNEL__
 593 static void cleanup_obdclass(void)
 594 {
 595         int i;
 596         __u64 memory_leaked, pages_leaked;
 597         __u64 memory_max, pages_max;
 598         int lustre_unregister_fs(void);
 599         ENTRY;
 600
 601         lustre_unregister_fs();
 602
 603         cfs_psdev_deregister(&obd_psdev);
 604         for (i = 0; i < class_devno_max(); i++) {
 605                 struct obd_device *obd = class_num2obd(i);
 606                 if (obd && obd->obd_set_up &&
 607                     OBT(obd) && OBP(obd, detach)) {
 608                         /* XXX should this call generic detach otherwise? */
 609                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 610                         OBP(obd, detach)(obd);
 611                 }
 612         }
 613
 614         obd_cleanup_caches();
 615         obd_sysctl_clean();
 616
 617         class_procfs_clean();
 618
 619         class_handle_cleanup();
 620         class_exit_uuidlist();
 621         obd_zombie_impexp_stop();
 622
 623         memory_leaked = obd_memory_sum();
 624         pages_leaked = obd_pages_sum();
 625
 626         memory_max = obd_memory_max();
 627         pages_max = obd_pages_max();
 628
 629         cfs_mem_cache_destroy(obd_lvfs_ctxt_cache);
 630
 631         lprocfs_free_stats(&obd_memory);
 632         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 633                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 634                memory_max, memory_leaked);
 635         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 636                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 637                pages_max, pages_leaked);
 638
 639         EXIT;
 640 }
 641
 642 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 643 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 644 MODULE_LICENSE("GPL");
 645
 646 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 647 #endif