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 #else
  44 # include <asm/atomic.h>
  45 #endif
  46
  47 #include <obd_support.h>
  48 #include <obd_class.h>
  49 #include <lustre_debug.h>
  50 #include <lprocfs_status.h>
  51 #include <lustre/lustre_build_version.h>
  52 #include <libcfs/list.h>
  53 #include "llog_internal.h"
  54
  55 #ifndef __KERNEL__
  56 /* liblustre workaround */
  57 atomic_t libcfs_kmemory = {0};
  58 #endif
  59
  60 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  61 struct list_head obd_types;
  62 spinlock_t obd_dev_lock = SPIN_LOCK_UNLOCKED;
  63
  64 #ifndef __KERNEL__
  65 __u64 obd_max_pages = 0;
  66 __u64 obd_max_alloc = 0;
  67 __u64 obd_alloc;
  68 __u64 obd_pages;
  69 #endif
  70
  71 /* The following are visible and mutable through /proc/sys/lustre/. */
  72 unsigned int obd_debug_peer_on_timeout;
  73 unsigned int obd_dump_on_timeout;
  74 unsigned int obd_dump_on_eviction;
  75 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  76 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  77 unsigned int obd_max_dirty_pages = 256;
  78 atomic_t obd_dirty_pages;
  79 atomic_t obd_dirty_transit_pages;
  80
  81 cfs_waitq_t obd_race_waitq;
  82 int obd_race_state;
  83
  84 #ifdef __KERNEL__
  85 unsigned long obd_print_fail_loc(void)
  86 {
  87         CWARN("obd_fail_loc = %lx\n", obd_fail_loc);
  88         return obd_fail_loc;
  89 }
  90
  91 /*  opening /dev/obd */
  92 static int obd_class_open(unsigned long flags, void *args)
  93 {
  94         ENTRY;
  95
  96         PORTAL_MODULE_USE;
  97         RETURN(0);
  98 }
  99
 100 /*  closing /dev/obd */
 101 static int obd_class_release(unsigned long flags, void *args)
 102 {
 103         ENTRY;
 104
 105         PORTAL_MODULE_UNUSE;
 106         RETURN(0);
 107 }
 108 #endif
 109
 110 static inline void obd_data2conn(struct lustre_handle *conn,
 111                                  struct obd_ioctl_data *data)
 112 {
 113         memset(conn, 0, sizeof *conn);
 114         conn->cookie = data->ioc_cookie;
 115 }
 116
 117 static inline void obd_conn2data(struct obd_ioctl_data *data,
 118                                  struct lustre_handle *conn)
 119 {
 120         data->ioc_cookie = conn->cookie;
 121 }
 122
 123 int class_resolve_dev_name(__u32 len, const char *name)
 124 {
 125         int rc;
 126         int dev;
 127
 128         ENTRY;
 129         if (!len || !name) {
 130                 CERROR("No name passed,!\n");
 131                 GOTO(out, rc = -EINVAL);
 132         }
 133         if (name[len - 1] != 0) {
 134                 CERROR("Name not nul terminated!\n");
 135                 GOTO(out, rc = -EINVAL);
 136         }
 137
 138         CDEBUG(D_IOCTL, "device name %s\n", name);
 139         dev = class_name2dev(name);
 140         if (dev == -1) {
 141                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 142                 GOTO(out, rc = -EINVAL);
 143         }
 144
 145         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 146         rc = dev;
 147
 148 out:
 149         RETURN(rc);
 150 }
 151
 152 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 153 {
 154         char *buf = NULL;
 155         struct obd_ioctl_data *data;
 156         struct libcfs_debug_ioctl_data *debug_data;
 157         struct obd_device *obd = NULL;
 158         int err = 0, len = 0;
 159         ENTRY;
 160
 161         /* only for debugging */
 162         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 163                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 164                 libcfs_subsystem_debug = debug_data->subs;
 165                 libcfs_debug = debug_data->debug;
 166                 return 0;
 167         }
 168
 169         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 170         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 171                 CERROR("OBD ioctl: data error\n");
 172                 GOTO(out, err = -EINVAL);
 173         }
 174         data = (struct obd_ioctl_data *)buf;
 175
 176         switch (cmd) {
 177         case OBD_IOC_PROCESS_CFG: {
 178                 struct lustre_cfg *lcfg;
 179
 180                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 181                         CERROR("No config buffer passed!\n");
 182                         GOTO(out, err = -EINVAL);
 183                 }
 184                 OBD_ALLOC(lcfg, data->ioc_plen1);
 185                 if (lcfg == NULL)
 186                         GOTO(out, err = -ENOMEM);
 187                 err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1);
 188                 if (!err)
 189                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 190                 if (!err)
 191                         err = class_process_config(lcfg);
 192
 193                 OBD_FREE(lcfg, data->ioc_plen1);
 194                 GOTO(out, err);
 195         }
 196
 197         case OBD_GET_VERSION:
 198                 if (!data->ioc_inlbuf1) {
 199                         CERROR("No buffer passed in ioctl\n");
 200                         GOTO(out, err = -EINVAL);
 201                 }
 202
 203                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 204                         CERROR("ioctl buffer too small to hold version\n");
 205                         GOTO(out, err = -EINVAL);
 206                 }
 207
 208                 memcpy(data->ioc_bulk, BUILD_VERSION,
 209                        strlen(BUILD_VERSION) + 1);
 210
 211                 err = obd_ioctl_popdata((void *)arg, data, len);
 212                 if (err)
 213                         err = -EFAULT;
 214                 GOTO(out, err);
 215
 216         case OBD_IOC_NAME2DEV: {
 217                 /* Resolve a device name.  This does not change the
 218                  * currently selected device.
 219                  */
 220                 int dev;
 221
 222                 dev = class_resolve_dev_name(data->ioc_inllen1,
 223                                              data->ioc_inlbuf1);
 224                 data->ioc_dev = dev;
 225                 if (dev < 0)
 226                         GOTO(out, err = -EINVAL);
 227
 228                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 229                 if (err)
 230                         err = -EFAULT;
 231                 GOTO(out, err);
 232         }
 233
 234         case OBD_IOC_UUID2DEV: {
 235                 /* Resolve a device uuid.  This does not change the
 236                  * currently selected device.
 237                  */
 238                 int dev;
 239                 struct obd_uuid uuid;
 240
 241                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 242                         CERROR("No UUID passed!\n");
 243                         GOTO(out, err = -EINVAL);
 244                 }
 245                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 246                         CERROR("UUID not NUL terminated!\n");
 247                         GOTO(out, err = -EINVAL);
 248                 }
 249
 250                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 251                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 252                 dev = class_uuid2dev(&uuid);
 253                 data->ioc_dev = dev;
 254                 if (dev == -1) {
 255                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 256                                data->ioc_inlbuf1);
 257                         GOTO(out, err = -EINVAL);
 258                 }
 259
 260                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 261                        dev);
 262                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 263                 if (err)
 264                         err = -EFAULT;
 265                 GOTO(out, err);
 266         }
 267
 268         case OBD_IOC_CLOSE_UUID: {
 269                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 270                        data->ioc_inlbuf1);
 271                 GOTO(out, err = 0);
 272         }
 273
 274         case OBD_IOC_GETDEVICE: {
 275                 int     index = data->ioc_count;
 276                 char    *status, *str;
 277
 278                 if (!data->ioc_inlbuf1) {
 279                         CERROR("No buffer passed in ioctl\n");
 280                         GOTO(out, err = -EINVAL);
 281                 }
 282                 if (data->ioc_inllen1 < 128) {
 283                         CERROR("ioctl buffer too small to hold version\n");
 284                         GOTO(out, err = -EINVAL);
 285                 }
 286
 287                 obd = class_num2obd(index);
 288                 if (!obd)
 289                         GOTO(out, err = -ENOENT);
 290
 291                 if (obd->obd_stopping)
 292                         status = "ST";
 293                 else if (obd->obd_set_up)
 294                         status = "UP";
 295                 else if (obd->obd_attached)
 296                         status = "AT";
 297                 else
 298                         status = "--";
 299                 str = (char *)data->ioc_bulk;
 300                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 301                          (int)index, status, obd->obd_type->typ_name,
 302                          obd->obd_name, obd->obd_uuid.uuid,
 303                          atomic_read(&obd->obd_refcount));
 304                 err = obd_ioctl_popdata((void *)arg, data, len);
 305
 306                 GOTO(out, err = 0);
 307         }
 308
 309         }
 310
 311         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 312                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 313                         GOTO(out, err = -EINVAL);
 314                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 315                         GOTO(out, err = -EINVAL);
 316                 obd = class_name2obd(data->ioc_inlbuf4);
 317         } else if (data->ioc_dev < class_devno_max()) {
 318                 obd = class_num2obd(data->ioc_dev);
 319         } else {
 320                 CERROR("OBD ioctl: No device\n");
 321                 GOTO(out, err = -EINVAL);
 322         }
 323
 324         if (obd == NULL) {
 325                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 326                 GOTO(out, err = -EINVAL);
 327         }
 328         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 329
 330         if (!obd->obd_set_up || obd->obd_stopping) {
 331                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 332                 GOTO(out, err = -EINVAL);
 333         }
 334
 335         switch(cmd) {
 336         case OBD_IOC_NO_TRANSNO: {
 337                 if (!obd->obd_attached) {
 338                         CERROR("Device %d not attached\n", obd->obd_minor);
 339                         GOTO(out, err = -ENODEV);
 340                 }
 341                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 342                        obd->obd_name);
 343                 obd->obd_no_transno = 1;
 344                 GOTO(out, err = 0);
 345         }
 346
 347         default: {
 348                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 349                 if (err)
 350                         GOTO(out, err);
 351
 352                 err = obd_ioctl_popdata((void *)arg, data, len);
 353                 if (err)
 354                         err = -EFAULT;
 355                 GOTO(out, err);
 356         }
 357         }
 358
 359  out:
 360         if (buf)
 361                 obd_ioctl_freedata(buf, len);
 362         RETURN(err);
 363 } /* class_handle_ioctl */
 364
 365
 366
 367 #define OBD_MINOR 241
 368 #ifdef __KERNEL__
 369 /* to control /dev/obd */
 370 static int obd_class_ioctl (struct cfs_psdev_file *pfile, unsigned long cmd,
 371                             void *arg)
 372 {
 373         return class_handle_ioctl(cmd, (unsigned long)arg);
 374 }
 375
 376 /* declare character device */
 377 struct cfs_psdev_ops obd_psdev_ops = {
 378         /* .p_open    = */ obd_class_open,      /* open */
 379         /* .p_close   = */ obd_class_release,   /* release */
 380         /* .p_read    = */ NULL,
 381         /* .p_write   = */ NULL,
 382         /* .p_ioctl   = */ obd_class_ioctl     /* ioctl */
 383 };
 384
 385 extern cfs_psdev_t obd_psdev;
 386 #else
 387 void *obd_psdev = NULL;
 388 #endif
 389
 390 EXPORT_SYMBOL(obd_devs);
 391 EXPORT_SYMBOL(obd_print_fail_loc);
 392 EXPORT_SYMBOL(obd_race_waitq);
 393 EXPORT_SYMBOL(obd_race_state);
 394 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 395 EXPORT_SYMBOL(obd_dump_on_timeout);
 396 EXPORT_SYMBOL(obd_dump_on_eviction);
 397 EXPORT_SYMBOL(obd_timeout);
 398 EXPORT_SYMBOL(ldlm_timeout);
 399 EXPORT_SYMBOL(obd_max_dirty_pages);
 400 EXPORT_SYMBOL(obd_dirty_pages);
 401 EXPORT_SYMBOL(obd_dirty_transit_pages);
 402 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 403
 404 EXPORT_SYMBOL(proc_lustre_root);
 405
 406 EXPORT_SYMBOL(class_register_type);
 407 EXPORT_SYMBOL(class_unregister_type);
 408 EXPORT_SYMBOL(class_get_type);
 409 EXPORT_SYMBOL(class_put_type);
 410 EXPORT_SYMBOL(class_name2dev);
 411 EXPORT_SYMBOL(class_name2obd);
 412 EXPORT_SYMBOL(class_uuid2dev);
 413 EXPORT_SYMBOL(class_uuid2obd);
 414 EXPORT_SYMBOL(class_find_client_obd);
 415 EXPORT_SYMBOL(class_devices_in_group);
 416 EXPORT_SYMBOL(class_conn2export);
 417 EXPORT_SYMBOL(class_exp2obd);
 418 EXPORT_SYMBOL(class_conn2obd);
 419 EXPORT_SYMBOL(class_exp2cliimp);
 420 EXPORT_SYMBOL(class_conn2cliimp);
 421 EXPORT_SYMBOL(class_disconnect);
 422 EXPORT_SYMBOL(class_num2obd);
 423
 424 /* uuid.c */
 425 EXPORT_SYMBOL(class_uuid_unparse);
 426 EXPORT_SYMBOL(lustre_uuid_to_peer);
 427
 428 EXPORT_SYMBOL(class_handle_hash);
 429 EXPORT_SYMBOL(class_handle_unhash);
 430 EXPORT_SYMBOL(class_handle_hash_back);
 431 EXPORT_SYMBOL(class_handle2object);
 432 EXPORT_SYMBOL(class_handle_free_cb);
 433
 434 /* obd_config.c */
 435 EXPORT_SYMBOL(class_incref);
 436 EXPORT_SYMBOL(class_decref);
 437 EXPORT_SYMBOL(class_get_profile);
 438 EXPORT_SYMBOL(class_del_profile);
 439 EXPORT_SYMBOL(class_del_profiles);
 440 EXPORT_SYMBOL(class_process_config);
 441 EXPORT_SYMBOL(class_process_proc_param);
 442 EXPORT_SYMBOL(class_config_parse_llog);
 443 EXPORT_SYMBOL(class_config_dump_llog);
 444 EXPORT_SYMBOL(class_attach);
 445 EXPORT_SYMBOL(class_setup);
 446 EXPORT_SYMBOL(class_cleanup);
 447 EXPORT_SYMBOL(class_detach);
 448 EXPORT_SYMBOL(class_manual_cleanup);
 449
 450 /* mea.c */
 451 EXPORT_SYMBOL(mea_name2idx);
 452 EXPORT_SYMBOL(raw_name2idx);
 453
 454 #define OBD_INIT_CHECK
 455 #ifdef OBD_INIT_CHECK
 456 int obd_init_checks(void)
 457 {
 458         __u64 u64val, div64val;
 459         char buf[64];
 460         int len, ret = 0;
 461
 462         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s, LPSZ=%s, LPSSZ=%s\n",
 463                LPU64, LPD64, LPX64, LPSZ, LPSSZ);
 464
 465         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 466
 467         u64val = OBD_OBJECT_EOF;
 468         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 469         if (u64val != OBD_OBJECT_EOF) {
 470                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 471                        u64val, (int)sizeof(u64val));
 472                 ret = -EINVAL;
 473         }
 474         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 475         if (len != 18) {
 476                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 477                 ret = -EINVAL;
 478         }
 479
 480         div64val = OBD_OBJECT_EOF;
 481         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 482         if (u64val != OBD_OBJECT_EOF) {
 483                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 484                        u64val, (int)sizeof(u64val));
 485                 ret = -EOVERFLOW;
 486         }
 487         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 488                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 489                        u64val, (int)sizeof(u64val));
 490                 return -EOVERFLOW;
 491         }
 492         if (do_div(div64val, 256) != (u64val & 255)) {
 493                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 494                 return -EOVERFLOW;
 495         }
 496         if (u64val >> 8 != div64val) {
 497                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 498                        u64val, div64val, u64val >> 8);
 499                 return -EOVERFLOW;
 500         }
 501         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 502         if (len != 18) {
 503                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 504                 ret = -EINVAL;
 505         }
 506         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 507         if (len != 20) {
 508                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 509                 ret = -EINVAL;
 510         }
 511         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 512         if (len != 2) {
 513                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 514                 ret = -EINVAL;
 515         }
 516         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 517                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 518                       (__u64)CFS_PAGE_SIZE);
 519                 ret = -EINVAL;
 520         }
 521
 522         return ret;
 523 }
 524 #else
 525 #define obd_init_checks() do {} while(0)
 526 #endif
 527
 528 extern spinlock_t obd_types_lock;
 529 extern int class_procfs_init(void);
 530 extern int class_procfs_clean(void);
 531
 532 #ifdef __KERNEL__
 533 static int __init init_obdclass(void)
 534 #else
 535 int init_obdclass(void)
 536 #endif
 537 {
 538         int i, err;
 539 #ifdef __KERNEL__
 540         int lustre_register_fs(void);
 541
 542         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 543                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 544 #endif
 545
 546         LCONSOLE_INFO("OBD class driver, http://www.lustre.org/\n");
 547         LCONSOLE_INFO("        Lustre Version: "LUSTRE_VERSION_STRING"\n");
 548         LCONSOLE_INFO("        Build Version: "BUILD_VERSION"\n");
 549
 550         spin_lock_init(&obd_types_lock);
 551         cfs_waitq_init(&obd_race_waitq);
 552         obd_zombie_impexp_init();
 553 #ifdef LPROCFS
 554         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 555                                          LPROCFS_STATS_FLAG_PERCPU);
 556         if (obd_memory == NULL) {
 557                 CERROR("kmalloc of 'obd_memory' failed\n");
 558                 RETURN(-ENOMEM);
 559         }
 560
 561         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 562                              LPROCFS_CNTR_AVGMINMAX,
 563                              "memused", "bytes");
 564         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 565                              LPROCFS_CNTR_AVGMINMAX,
 566                              "pagesused", "pages");
 567 #endif
 568         err = obd_init_checks();
 569         if (err == -EOVERFLOW)
 570                 return err;
 571
 572         class_init_uuidlist();
 573         err = class_handle_init();
 574         if (err)
 575                 return err;
 576
 577         spin_lock_init(&obd_dev_lock);
 578         CFS_INIT_LIST_HEAD(&obd_types);
 579
 580         err = cfs_psdev_register(&obd_psdev);
 581         if (err) {
 582                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 583                 return err;
 584         }
 585
 586         /* This struct is already zeroed for us (static global) */
 587         for (i = 0; i < class_devno_max(); i++)
 588                 obd_devs[i] = NULL;
 589
 590         /* Default the dirty page cache cap to 1/2 of system memory.
 591          * For clients with less memory, a larger fraction is needed
 592          * for other purposes (mostly for BGL). */
 593         if (num_physpages <= 512 << (20 - CFS_PAGE_SHIFT))
 594                 obd_max_dirty_pages = num_physpages / 4;
 595         else
 596                 obd_max_dirty_pages = num_physpages / 2;
 597
 598         err = obd_init_caches();
 599         if (err)
 600                 return err;
 601         err = lu_global_init();
 602         if (err)
 603                 return err;
 604 #ifdef __KERNEL__
 605         err = class_procfs_init();
 606         if (err)
 607                 return err;
 608         err = lustre_register_fs();
 609 #endif
 610
 611         return err;
 612 }
 613
 614 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 615  * ifdef to the end of the file to cover module and versioning goo.*/
 616 #ifdef __KERNEL__
 617 static void cleanup_obdclass(void)
 618 {
 619         int i;
 620         int lustre_unregister_fs(void);
 621         __u64 memory_leaked, pages_leaked;
 622         __u64 memory_max, pages_max;
 623         ENTRY;
 624
 625         lustre_unregister_fs();
 626
 627         cfs_psdev_deregister(&obd_psdev);
 628         for (i = 0; i < class_devno_max(); i++) {
 629                 struct obd_device *obd = class_num2obd(i);
 630                 if (obd && obd->obd_set_up &&
 631                     OBT(obd) && OBP(obd, detach)) {
 632                         /* XXX should this call generic detach otherwise? */
 633                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 634                         OBP(obd, detach)(obd);
 635                 }
 636         }
 637         lu_global_fini();
 638
 639         obd_cleanup_caches();
 640         obd_sysctl_clean();
 641
 642         class_procfs_clean();
 643
 644         class_handle_cleanup();
 645         class_exit_uuidlist();
 646         obd_zombie_impexp_stop();
 647
 648         memory_leaked = obd_memory_sum();
 649         pages_leaked = obd_pages_sum();
 650
 651         memory_max = obd_memory_max();
 652         pages_max = obd_pages_max();
 653
 654         lprocfs_free_stats(&obd_memory);
 655         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 656                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 657                memory_max, memory_leaked);
 658         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 659                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 660                pages_max, pages_leaked);
 661
 662         EXIT;
 663 }
 664
 665 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 666 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 667 MODULE_LICENSE("GPL");
 668
 669 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 670 #endif