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  * Object Devices Class Driver
   5  *
   6  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   7  *
   8  *   This file is part of the Lustre file system, http://www.lustre.org
   9  *   Lustre is a trademark of Cluster File Systems, Inc.
  10  *
  11  *   You may have signed or agreed to another license before downloading
  12  *   this software.  If so, you are bound by the terms and conditions
  13  *   of that agreement, and the following does not apply to you.  See the
  14  *   LICENSE file included with this distribution for more information.
  15  *
  16  *   If you did not agree to a different license, then this copy of Lustre
  17  *   is open source software; you can redistribute it and/or modify it
  18  *   under the terms of version 2 of the GNU General Public License as
  19  *   published by the Free Software Foundation.
  20  *
  21  *   In either case, Lustre is distributed in the hope that it will be
  22  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  23  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  *   license text for more details.
  25  *
  26  * These are the only exported functions, they provide some generic
  27  * infrastructure for managing object devices
  28  */
  29
  30 #define DEBUG_SUBSYSTEM S_CLASS
  31 #ifndef EXPORT_SYMTAB
  32 # define EXPORT_SYMTAB
  33 #endif
  34 #ifndef __KERNEL__
  35 # include <liblustre.h>
  36 #endif
  37
  38 #include <obd_support.h>
  39 #include <obd_class.h>
  40 #include <lustre_debug.h>
  41 #include <lprocfs_status.h>
  42 #include <lustre/lustre_build_version.h>
  43 #include <libcfs/list.h>
  44 #include "llog_internal.h"
  45
  46 #ifndef __KERNEL__
  47 /* liblustre workaround */
  48 atomic_t libcfs_kmemory = {0};
  49 #endif
  50
  51 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  52 struct list_head obd_types;
  53 spinlock_t obd_dev_lock = SPIN_LOCK_UNLOCKED;
  54
  55 #ifndef __KERNEL__
  56 __u64 obd_max_pages = 0;
  57 __u64 obd_max_alloc = 0;
  58 __u64 obd_alloc;
  59 __u64 obd_pages;
  60 #endif
  61
  62 /* The following are visible and mutable through /proc/sys/lustre/. */
  63 unsigned int obd_fail_loc;
  64 unsigned int obd_fail_val;
  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_timeout = OBD_TIMEOUT_DEFAULT; /* seconds */
  69 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  70 unsigned int obd_health_check_timeout = HEALTH_CHECK_TIMEOUT_DEFAULT; /* seconds */
  71 unsigned int obd_max_dirty_pages = 256;
  72 atomic_t obd_dirty_pages;
  73
  74 cfs_waitq_t obd_race_waitq;
  75 int obd_race_state;
  76
  77 #ifdef __KERNEL__
  78 unsigned int obd_print_fail_loc(void)
  79 {
  80         CWARN("obd_fail_loc = %x\n", obd_fail_loc);
  81         return obd_fail_loc;
  82 }
  83
  84 void obd_set_fail_loc(unsigned int fl)
  85 {
  86         obd_fail_loc = fl;
  87 }
  88
  89 /*  opening /dev/obd */
  90 static int obd_class_open(unsigned long flags, void *args)
  91 {
  92         ENTRY;
  93
  94         PORTAL_MODULE_USE;
  95         RETURN(0);
  96 }
  97
  98 /*  closing /dev/obd */
  99 static int obd_class_release(unsigned long flags, void *args)
 100 {
 101         ENTRY;
 102
 103         PORTAL_MODULE_UNUSE;
 104         RETURN(0);
 105 }
 106 #endif
 107
 108 static inline void obd_data2conn(struct lustre_handle *conn,
 109                                  struct obd_ioctl_data *data)
 110 {
 111         memset(conn, 0, sizeof *conn);
 112         conn->cookie = data->ioc_cookie;
 113 }
 114
 115 static inline void obd_conn2data(struct obd_ioctl_data *data,
 116                                  struct lustre_handle *conn)
 117 {
 118         data->ioc_cookie = conn->cookie;
 119 }
 120
 121 int class_resolve_dev_name(__u32 len, const char *name)
 122 {
 123         int rc;
 124         int dev;
 125
 126         ENTRY;
 127         if (!len || !name) {
 128                 CERROR("No name passed,!\n");
 129                 GOTO(out, rc = -EINVAL);
 130         }
 131         if (name[len - 1] != 0) {
 132                 CERROR("Name not nul terminated!\n");
 133                 GOTO(out, rc = -EINVAL);
 134         }
 135
 136         CDEBUG(D_IOCTL, "device name %s\n", name);
 137         dev = class_name2dev(name);
 138         if (dev == -1) {
 139                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 140                 GOTO(out, rc = -EINVAL);
 141         }
 142
 143         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 144         rc = dev;
 145
 146 out:
 147         RETURN(rc);
 148 }
 149
 150 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 151 {
 152         char *buf = NULL;
 153         struct obd_ioctl_data *data;
 154         struct libcfs_debug_ioctl_data *debug_data;
 155         struct obd_device *obd = NULL;
 156         int err = 0, len = 0;
 157         ENTRY;
 158
 159         /* only for debugging */
 160         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 161                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 162                 libcfs_subsystem_debug = debug_data->subs;
 163                 libcfs_debug = debug_data->debug;
 164                 return 0;
 165         }
 166
 167         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 168         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 169                 CERROR("OBD ioctl: data error\n");
 170                 GOTO(out, err = -EINVAL);
 171         }
 172         data = (struct obd_ioctl_data *)buf;
 173
 174         switch (cmd) {
 175         case OBD_IOC_PROCESS_CFG: {
 176                 struct lustre_cfg *lcfg;
 177
 178                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 179                         CERROR("No config buffer passed!\n");
 180                         GOTO(out, err = -EINVAL);
 181                 }
 182                 OBD_ALLOC(lcfg, data->ioc_plen1);
 183                 if (lcfg == NULL)
 184                         GOTO(out, err = -ENOMEM);
 185                 err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1);
 186                 if (!err)
 187                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 188                 if (!err)
 189                         err = class_process_config(lcfg);
 190
 191                 OBD_FREE(lcfg, data->ioc_plen1);
 192                 GOTO(out, err);
 193         }
 194
 195         case OBD_GET_VERSION:
 196                 if (!data->ioc_inlbuf1) {
 197                         CERROR("No buffer passed in ioctl\n");
 198                         GOTO(out, err = -EINVAL);
 199                 }
 200
 201                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 202                         CERROR("ioctl buffer too small to hold version\n");
 203                         GOTO(out, err = -EINVAL);
 204                 }
 205
 206                 memcpy(data->ioc_bulk, BUILD_VERSION,
 207                        strlen(BUILD_VERSION) + 1);
 208
 209                 err = obd_ioctl_popdata((void *)arg, data, len);
 210                 if (err)
 211                         err = -EFAULT;
 212                 GOTO(out, err);
 213
 214         case OBD_IOC_NAME2DEV: {
 215                 /* Resolve a device name.  This does not change the
 216                  * currently selected device.
 217                  */
 218                 int dev;
 219
 220                 dev = class_resolve_dev_name(data->ioc_inllen1,
 221                                              data->ioc_inlbuf1);
 222                 data->ioc_dev = dev;
 223                 if (dev < 0)
 224                         GOTO(out, err = -EINVAL);
 225
 226                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 227                 if (err)
 228                         err = -EFAULT;
 229                 GOTO(out, err);
 230         }
 231
 232         case OBD_IOC_UUID2DEV: {
 233                 /* Resolve a device uuid.  This does not change the
 234                  * currently selected device.
 235                  */
 236                 int dev;
 237                 struct obd_uuid uuid;
 238
 239                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 240                         CERROR("No UUID passed!\n");
 241                         GOTO(out, err = -EINVAL);
 242                 }
 243                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 244                         CERROR("UUID not NUL terminated!\n");
 245                         GOTO(out, err = -EINVAL);
 246                 }
 247
 248                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 249                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 250                 dev = class_uuid2dev(&uuid);
 251                 data->ioc_dev = dev;
 252                 if (dev == -1) {
 253                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 254                                data->ioc_inlbuf1);
 255                         GOTO(out, err = -EINVAL);
 256                 }
 257
 258                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 259                        dev);
 260                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 261                 if (err)
 262                         err = -EFAULT;
 263                 GOTO(out, err);
 264         }
 265
 266         case OBD_IOC_CLOSE_UUID: {
 267                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 268                        data->ioc_inlbuf1);
 269                 GOTO(out, err = 0);
 270         }
 271
 272         case OBD_IOC_GETDEVICE: {
 273                 int     index = data->ioc_count;
 274                 char    *status, *str;
 275
 276                 if (!data->ioc_inlbuf1) {
 277                         CERROR("No buffer passed in ioctl\n");
 278                         GOTO(out, err = -EINVAL);
 279                 }
 280                 if (data->ioc_inllen1 < 128) {
 281                         CERROR("ioctl buffer too small to hold version\n");
 282                         GOTO(out, err = -EINVAL);
 283                 }
 284
 285                 obd = class_num2obd(index);
 286                 if (!obd)
 287                         GOTO(out, err = -ENOENT);
 288
 289                 if (obd->obd_stopping)
 290                         status = "ST";
 291                 else if (obd->obd_set_up)
 292                         status = "UP";
 293                 else if (obd->obd_attached)
 294                         status = "AT";
 295                 else
 296                         status = "--";
 297                 str = (char *)data->ioc_bulk;
 298                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 299                          (int)index, status, obd->obd_type->typ_name,
 300                          obd->obd_name, obd->obd_uuid.uuid,
 301                          atomic_read(&obd->obd_refcount));
 302                 err = obd_ioctl_popdata((void *)arg, data, len);
 303
 304                 GOTO(out, err = 0);
 305         }
 306
 307         }
 308
 309         if (data->ioc_dev >= class_devno_max()) {
 310                 CERROR("OBD ioctl: No device\n");
 311                 GOTO(out, err = -EINVAL);
 312         }
 313
 314         obd = class_num2obd(data->ioc_dev);
 315         if (obd == NULL) {
 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                 obd->obd_no_transno = 1;
 335                 GOTO(out, err = 0);
 336         }
 337
 338         default: {
 339                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 340                 if (err)
 341                         GOTO(out, err);
 342
 343                 err = obd_ioctl_popdata((void *)arg, data, len);
 344                 if (err)
 345                         err = -EFAULT;
 346                 GOTO(out, err);
 347         }
 348         }
 349
 350  out:
 351         if (buf)
 352                 obd_ioctl_freedata(buf, len);
 353         RETURN(err);
 354 } /* class_handle_ioctl */
 355
 356
 357
 358 #define OBD_MINOR 241
 359 #ifdef __KERNEL__
 360 /* to control /dev/obd */
 361 static int obd_class_ioctl (struct cfs_psdev_file *pfile, unsigned long cmd,
 362                             void *arg)
 363 {
 364         return class_handle_ioctl(cmd, (unsigned long)arg);
 365 }
 366
 367 /* declare character device */
 368 struct cfs_psdev_ops obd_psdev_ops = {
 369         /* .p_open    = */ obd_class_open,      /* open */
 370         /* .p_close   = */ obd_class_release,   /* release */
 371         /* .p_read    = */ NULL,
 372         /* .p_write   = */ NULL,
 373         /* .p_ioctl   = */ obd_class_ioctl     /* ioctl */
 374 };
 375
 376 extern cfs_psdev_t obd_psdev;
 377 #else
 378 void *obd_psdev = NULL;
 379 #endif
 380
 381 EXPORT_SYMBOL(obd_devs);
 382 EXPORT_SYMBOL(obd_fail_loc);
 383 EXPORT_SYMBOL(obd_fail_val);
 384 EXPORT_SYMBOL(obd_print_fail_loc);
 385 EXPORT_SYMBOL(obd_race_waitq);
 386 EXPORT_SYMBOL(obd_race_state);
 387 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 388 EXPORT_SYMBOL(obd_dump_on_timeout);
 389 EXPORT_SYMBOL(obd_dump_on_eviction);
 390 EXPORT_SYMBOL(obd_timeout);
 391 EXPORT_SYMBOL(ldlm_timeout);
 392 EXPORT_SYMBOL(obd_health_check_timeout);
 393 EXPORT_SYMBOL(obd_max_dirty_pages);
 394 EXPORT_SYMBOL(obd_dirty_pages);
 395 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 396
 397 EXPORT_SYMBOL(proc_lustre_root);
 398
 399 EXPORT_SYMBOL(class_register_type);
 400 EXPORT_SYMBOL(class_unregister_type);
 401 EXPORT_SYMBOL(class_get_type);
 402 EXPORT_SYMBOL(class_put_type);
 403 EXPORT_SYMBOL(class_name2dev);
 404 EXPORT_SYMBOL(class_name2obd);
 405 EXPORT_SYMBOL(class_uuid2dev);
 406 EXPORT_SYMBOL(class_uuid2obd);
 407 EXPORT_SYMBOL(class_find_client_obd);
 408 EXPORT_SYMBOL(class_find_client_notype);
 409 EXPORT_SYMBOL(class_devices_in_group);
 410 EXPORT_SYMBOL(class_conn2export);
 411 EXPORT_SYMBOL(class_exp2obd);
 412 EXPORT_SYMBOL(class_conn2obd);
 413 EXPORT_SYMBOL(class_exp2cliimp);
 414 EXPORT_SYMBOL(class_conn2cliimp);
 415 EXPORT_SYMBOL(class_disconnect);
 416 EXPORT_SYMBOL(class_num2obd);
 417
 418 /* uuid.c */
 419 EXPORT_SYMBOL(class_uuid_unparse);
 420 EXPORT_SYMBOL(lustre_uuid_to_peer);
 421
 422 EXPORT_SYMBOL(class_handle_hash);
 423 EXPORT_SYMBOL(class_handle_unhash);
 424 EXPORT_SYMBOL(class_handle_hash_back);
 425 EXPORT_SYMBOL(class_handle2object);
 426 EXPORT_SYMBOL(class_handle_free_cb);
 427
 428 /* obd_config.c */
 429 EXPORT_SYMBOL(class_incref);
 430 EXPORT_SYMBOL(class_decref);
 431 EXPORT_SYMBOL(class_get_profile);
 432 EXPORT_SYMBOL(class_del_profile);
 433 EXPORT_SYMBOL(class_del_profiles);
 434 EXPORT_SYMBOL(class_process_config);
 435 EXPORT_SYMBOL(class_process_proc_param);
 436 EXPORT_SYMBOL(class_config_parse_llog);
 437 EXPORT_SYMBOL(class_config_dump_llog);
 438 EXPORT_SYMBOL(class_attach);
 439 EXPORT_SYMBOL(class_setup);
 440 EXPORT_SYMBOL(class_cleanup);
 441 EXPORT_SYMBOL(class_detach);
 442 EXPORT_SYMBOL(class_manual_cleanup);
 443
 444 /* mea.c */
 445 EXPORT_SYMBOL(mea_name2idx);
 446 EXPORT_SYMBOL(raw_name2idx);
 447
 448 #define OBD_INIT_CHECK
 449 #ifdef OBD_INIT_CHECK
 450 int obd_init_checks(void)
 451 {
 452         __u64 u64val, div64val;
 453         char buf[64];
 454         int len, ret = 0;
 455
 456         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s, LPSZ=%s, LPSSZ=%s\n",
 457                LPU64, LPD64, LPX64, LPSZ, LPSSZ);
 458
 459         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 460
 461         u64val = OBD_OBJECT_EOF;
 462         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 463         if (u64val != OBD_OBJECT_EOF) {
 464                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 465                        u64val, (int)sizeof(u64val));
 466                 ret = -EINVAL;
 467         }
 468         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 469         if (len != 18) {
 470                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 471                 ret = -EINVAL;
 472         }
 473
 474         div64val = OBD_OBJECT_EOF;
 475         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 476         if (u64val != OBD_OBJECT_EOF) {
 477                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 478                        u64val, (int)sizeof(u64val));
 479                 ret = -EOVERFLOW;
 480         }
 481         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 482                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 483                        u64val, (int)sizeof(u64val));
 484                 return -EOVERFLOW;
 485         }
 486         if (do_div(div64val, 256) != (u64val & 255)) {
 487                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 488                 return -EOVERFLOW;
 489         }
 490         if (u64val >> 8 != div64val) {
 491                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 492                        u64val, div64val, u64val >> 8);
 493                 return -EOVERFLOW;
 494         }
 495         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 496         if (len != 18) {
 497                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 498                 ret = -EINVAL;
 499         }
 500         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 501         if (len != 20) {
 502                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 503                 ret = -EINVAL;
 504         }
 505         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 506         if (len != 2) {
 507                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 508                 ret = -EINVAL;
 509         }
 510         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 511                 CWARN("mask failed: u64val "LPU64" >= %lu\n", u64val,
 512                       CFS_PAGE_SIZE);
 513                 ret = -EINVAL;
 514         }
 515
 516         return ret;
 517 }
 518 #else
 519 #define obd_init_checks() do {} while(0)
 520 #endif
 521
 522 extern spinlock_t obd_types_lock;
 523 extern int class_procfs_init(void);
 524 extern int class_procfs_clean(void);
 525
 526 #ifdef __KERNEL__
 527 static int __init init_obdclass(void)
 528 #else
 529 int init_obdclass(void)
 530 #endif
 531 {
 532         int i, err;
 533 #ifdef __KERNEL__
 534         int lustre_register_fs(void);
 535
 536         printk(KERN_INFO "Lustre: OBD class driver, info@clusterfs.com\n");
 537         printk(KERN_INFO "        Lustre Version: "LUSTRE_VERSION_STRING"\n");
 538         printk(KERN_INFO "        Build Version: "BUILD_VERSION"\n");
 539
 540         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 541                 INIT_LIST_HEAD(&capa_list[i]);
 542 #else
 543         CDEBUG(D_INFO, "Lustre: OBD class driver, info@clusterfs.com\n");
 544         CDEBUG(D_INFO, "        Lustre Version: "LUSTRE_VERSION_STRING"\n");
 545         CDEBUG(D_INFO, "        Build Version: "BUILD_VERSION"\n");
 546 #endif
 547
 548         spin_lock_init(&obd_types_lock);
 549         cfs_waitq_init(&obd_race_waitq);
 550         obd_zombie_impexp_init();
 551 #ifdef LPROCFS
 552         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 553                                          LPROCFS_STATS_FLAG_PERCPU);
 554         if (obd_memory == NULL) {
 555                 CERROR("kmalloc of 'obd_memory' failed\n");
 556                 RETURN(-ENOMEM);
 557         }
 558
 559         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 560                              LPROCFS_CNTR_AVGMINMAX,
 561                              "memused", "bytes");
 562         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 563                              LPROCFS_CNTR_AVGMINMAX,
 564                              "pagesused", "pages");
 565 #endif
 566         err = obd_init_checks();
 567         if (err == -EOVERFLOW)
 568                 return err;
 569
 570         class_init_uuidlist();
 571         err = class_handle_init();
 572         if (err)
 573                 return err;
 574
 575         spin_lock_init(&obd_dev_lock);
 576         INIT_LIST_HEAD(&obd_types);
 577
 578         err = cfs_psdev_register(&obd_psdev);
 579         if (err) {
 580                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 581                 return err;
 582         }
 583
 584         /* This struct is already zerod for us (static global) */
 585         for (i = 0; i < class_devno_max(); i++)
 586                 obd_devs[i] = NULL;
 587
 588         /* Default the dirty page cache cap to 1/2 of system memory */
 589         obd_max_dirty_pages = num_physpages / 2;
 590
 591         err = obd_init_caches();
 592         if (err)
 593                 return err;
 594 #ifdef __KERNEL__
 595         err = lu_global_init();
 596         if (err)
 597                 return err;
 598         err = class_procfs_init();
 599         if (err)
 600                 return err;
 601         err = lustre_register_fs();
 602 #endif
 603
 604         return err;
 605 }
 606
 607 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 608  * ifdef to the end of the file to cover module and versioning goo.*/
 609 #ifdef __KERNEL__
 610 static void cleanup_obdclass(void)
 611 {
 612         int i;
 613         int lustre_unregister_fs(void);
 614         __u64 memory_leaked, pages_leaked;
 615         __u64 memory_max, pages_max;
 616         ENTRY;
 617
 618         lustre_unregister_fs();
 619
 620         cfs_psdev_deregister(&obd_psdev);
 621         for (i = 0; i < class_devno_max(); i++) {
 622                 struct obd_device *obd = class_num2obd(i);
 623                 if (obd && obd->obd_set_up &&
 624                     OBT(obd) && OBP(obd, detach)) {
 625                         /* XXX should this call generic detach otherwise? */
 626                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 627                         OBP(obd, detach)(obd);
 628                 }
 629         }
 630         lu_global_fini();
 631
 632         obd_cleanup_caches();
 633         obd_sysctl_clean();
 634
 635         class_procfs_clean();
 636
 637         class_handle_cleanup();
 638         class_exit_uuidlist();
 639
 640         memory_leaked = obd_memory_sum();
 641         pages_leaked = obd_pages_sum();
 642
 643         memory_max = obd_memory_max();
 644         pages_max = obd_pages_max();
 645
 646         lprocfs_free_stats(&obd_memory);
 647         if (memory_leaked > 0) {
 648                 CWARN("Memory leaks detected (max "LPU64", leaked "LPD64")\n",
 649                       memory_max, memory_leaked);
 650         }
 651         if (pages_leaked > 0) {
 652                 CWARN("Page leaks detected (max "LPU64", leaked "LPU64")\n",
 653                       pages_max, pages_leaked);
 654         }
 655
 656         EXIT;
 657 }
 658
 659 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 660 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 661 MODULE_LICENSE("GPL");
 662
 663 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 664 #endif