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 cfs_atomic_t libcfs_kmemory = {0};
  58 #endif
  59
  60 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  61 cfs_list_t obd_types;
  62 cfs_spinlock_t obd_dev_lock = CFS_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_max_dirty_pages = 256;
  76 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  77 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  78 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  79 unsigned int at_min = 0;
  80 unsigned int at_max = 600;
  81 unsigned int at_history = 600;
  82 int at_early_margin = 5;
  83 int at_extra = 30;
  84
  85 cfs_atomic_t obd_dirty_pages;
  86 cfs_atomic_t obd_dirty_transit_pages;
  87
  88 cfs_waitq_t obd_race_waitq;
  89 int obd_race_state;
  90
  91 #ifdef __KERNEL__
  92 unsigned long obd_print_fail_loc(void)
  93 {
  94         CWARN("obd_fail_loc = %lx\n", obd_fail_loc);
  95         return obd_fail_loc;
  96 }
  97
  98 /*  opening /dev/obd */
  99 static int obd_class_open(unsigned long flags, void *args)
 100 {
 101         ENTRY;
 102
 103         PORTAL_MODULE_USE;
 104         RETURN(0);
 105 }
 106
 107 /*  closing /dev/obd */
 108 static int obd_class_release(unsigned long flags, void *args)
 109 {
 110         ENTRY;
 111
 112         PORTAL_MODULE_UNUSE;
 113         RETURN(0);
 114 }
 115 #endif
 116
 117 static inline void obd_data2conn(struct lustre_handle *conn,
 118                                  struct obd_ioctl_data *data)
 119 {
 120         memset(conn, 0, sizeof *conn);
 121         conn->cookie = data->ioc_cookie;
 122 }
 123
 124 static inline void obd_conn2data(struct obd_ioctl_data *data,
 125                                  struct lustre_handle *conn)
 126 {
 127         data->ioc_cookie = conn->cookie;
 128 }
 129
 130 int class_resolve_dev_name(__u32 len, const char *name)
 131 {
 132         int rc;
 133         int dev;
 134
 135         ENTRY;
 136         if (!len || !name) {
 137                 CERROR("No name passed,!\n");
 138                 GOTO(out, rc = -EINVAL);
 139         }
 140         if (name[len - 1] != 0) {
 141                 CERROR("Name not nul terminated!\n");
 142                 GOTO(out, rc = -EINVAL);
 143         }
 144
 145         CDEBUG(D_IOCTL, "device name %s\n", name);
 146         dev = class_name2dev(name);
 147         if (dev == -1) {
 148                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 149                 GOTO(out, rc = -EINVAL);
 150         }
 151
 152         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 153         rc = dev;
 154
 155 out:
 156         RETURN(rc);
 157 }
 158
 159 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 160 {
 161         char *buf = NULL;
 162         struct obd_ioctl_data *data;
 163         struct libcfs_debug_ioctl_data *debug_data;
 164         struct obd_device *obd = NULL;
 165         int err = 0, len = 0;
 166         ENTRY;
 167
 168         /* only for debugging */
 169         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 170                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 171                 libcfs_subsystem_debug = debug_data->subs;
 172                 libcfs_debug = debug_data->debug;
 173                 return 0;
 174         }
 175
 176         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 177         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 178                 CERROR("OBD ioctl: data error\n");
 179                 GOTO(out, err = -EINVAL);
 180         }
 181         data = (struct obd_ioctl_data *)buf;
 182
 183         switch (cmd) {
 184         case OBD_IOC_PROCESS_CFG: {
 185                 struct lustre_cfg *lcfg;
 186
 187                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 188                         CERROR("No config buffer passed!\n");
 189                         GOTO(out, err = -EINVAL);
 190                 }
 191                 OBD_ALLOC(lcfg, data->ioc_plen1);
 192                 if (lcfg == NULL)
 193                         GOTO(out, err = -ENOMEM);
 194                 err = cfs_copy_from_user(lcfg, data->ioc_pbuf1,
 195                                          data->ioc_plen1);
 196                 if (!err)
 197                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 198                 if (!err)
 199                         err = class_process_config(lcfg);
 200
 201                 OBD_FREE(lcfg, data->ioc_plen1);
 202                 GOTO(out, err);
 203         }
 204
 205         case OBD_GET_VERSION:
 206                 if (!data->ioc_inlbuf1) {
 207                         CERROR("No buffer passed in ioctl\n");
 208                         GOTO(out, err = -EINVAL);
 209                 }
 210
 211                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 212                         CERROR("ioctl buffer too small to hold version\n");
 213                         GOTO(out, err = -EINVAL);
 214                 }
 215
 216                 memcpy(data->ioc_bulk, BUILD_VERSION,
 217                        strlen(BUILD_VERSION) + 1);
 218
 219                 err = obd_ioctl_popdata((void *)arg, data, len);
 220                 if (err)
 221                         err = -EFAULT;
 222                 GOTO(out, err);
 223
 224         case OBD_IOC_NAME2DEV: {
 225                 /* Resolve a device name.  This does not change the
 226                  * currently selected device.
 227                  */
 228                 int dev;
 229
 230                 dev = class_resolve_dev_name(data->ioc_inllen1,
 231                                              data->ioc_inlbuf1);
 232                 data->ioc_dev = dev;
 233                 if (dev < 0)
 234                         GOTO(out, err = -EINVAL);
 235
 236                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 237                 if (err)
 238                         err = -EFAULT;
 239                 GOTO(out, err);
 240         }
 241
 242         case OBD_IOC_UUID2DEV: {
 243                 /* Resolve a device uuid.  This does not change the
 244                  * currently selected device.
 245                  */
 246                 int dev;
 247                 struct obd_uuid uuid;
 248
 249                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 250                         CERROR("No UUID passed!\n");
 251                         GOTO(out, err = -EINVAL);
 252                 }
 253                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 254                         CERROR("UUID not NUL terminated!\n");
 255                         GOTO(out, err = -EINVAL);
 256                 }
 257
 258                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 259                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 260                 dev = class_uuid2dev(&uuid);
 261                 data->ioc_dev = dev;
 262                 if (dev == -1) {
 263                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 264                                data->ioc_inlbuf1);
 265                         GOTO(out, err = -EINVAL);
 266                 }
 267
 268                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 269                        dev);
 270                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 271                 if (err)
 272                         err = -EFAULT;
 273                 GOTO(out, err);
 274         }
 275
 276         case OBD_IOC_CLOSE_UUID: {
 277                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 278                        data->ioc_inlbuf1);
 279                 GOTO(out, err = 0);
 280         }
 281
 282         case OBD_IOC_GETDEVICE: {
 283                 int     index = data->ioc_count;
 284                 char    *status, *str;
 285
 286                 if (!data->ioc_inlbuf1) {
 287                         CERROR("No buffer passed in ioctl\n");
 288                         GOTO(out, err = -EINVAL);
 289                 }
 290                 if (data->ioc_inllen1 < 128) {
 291                         CERROR("ioctl buffer too small to hold version\n");
 292                         GOTO(out, err = -EINVAL);
 293                 }
 294
 295                 obd = class_num2obd(index);
 296                 if (!obd)
 297                         GOTO(out, err = -ENOENT);
 298
 299                 if (obd->obd_stopping)
 300                         status = "ST";
 301                 else if (obd->obd_set_up)
 302                         status = "UP";
 303                 else if (obd->obd_attached)
 304                         status = "AT";
 305                 else
 306                         status = "--";
 307                 str = (char *)data->ioc_bulk;
 308                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 309                          (int)index, status, obd->obd_type->typ_name,
 310                          obd->obd_name, obd->obd_uuid.uuid,
 311                          cfs_atomic_read(&obd->obd_refcount));
 312                 err = obd_ioctl_popdata((void *)arg, data, len);
 313
 314                 GOTO(out, err = 0);
 315         }
 316
 317         }
 318
 319         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 320                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 321                         GOTO(out, err = -EINVAL);
 322                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 323                         GOTO(out, err = -EINVAL);
 324                 obd = class_name2obd(data->ioc_inlbuf4);
 325         } else if (data->ioc_dev < class_devno_max()) {
 326                 obd = class_num2obd(data->ioc_dev);
 327         } else {
 328                 CERROR("OBD ioctl: No device\n");
 329                 GOTO(out, err = -EINVAL);
 330         }
 331
 332         if (obd == NULL) {
 333                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 334                 GOTO(out, err = -EINVAL);
 335         }
 336         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 337
 338         if (!obd->obd_set_up || obd->obd_stopping) {
 339                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 340                 GOTO(out, err = -EINVAL);
 341         }
 342
 343         switch(cmd) {
 344         case OBD_IOC_NO_TRANSNO: {
 345                 if (!obd->obd_attached) {
 346                         CERROR("Device %d not attached\n", obd->obd_minor);
 347                         GOTO(out, err = -ENODEV);
 348                 }
 349                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 350                        obd->obd_name);
 351                 obd->obd_no_transno = 1;
 352                 GOTO(out, err = 0);
 353         }
 354
 355         default: {
 356                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 357                 if (err)
 358                         GOTO(out, err);
 359
 360                 err = obd_ioctl_popdata((void *)arg, data, len);
 361                 if (err)
 362                         err = -EFAULT;
 363                 GOTO(out, err);
 364         }
 365         }
 366
 367  out:
 368         if (buf)
 369                 obd_ioctl_freedata(buf, len);
 370         RETURN(err);
 371 } /* class_handle_ioctl */
 372
 373
 374
 375 #define OBD_MINOR 241
 376 #ifdef __KERNEL__
 377 /* to control /dev/obd */
 378 static int obd_class_ioctl (struct cfs_psdev_file *pfile, unsigned long cmd,
 379                             void *arg)
 380 {
 381         return class_handle_ioctl(cmd, (unsigned long)arg);
 382 }
 383
 384 /* declare character device */
 385 struct cfs_psdev_ops obd_psdev_ops = {
 386         /* .p_open    = */ obd_class_open,      /* open */
 387         /* .p_close   = */ obd_class_release,   /* release */
 388         /* .p_read    = */ NULL,
 389         /* .p_write   = */ NULL,
 390         /* .p_ioctl   = */ obd_class_ioctl     /* ioctl */
 391 };
 392
 393 extern cfs_psdev_t obd_psdev;
 394 #else
 395 void *obd_psdev = NULL;
 396 #endif
 397
 398 EXPORT_SYMBOL(obd_devs);
 399 EXPORT_SYMBOL(obd_print_fail_loc);
 400 EXPORT_SYMBOL(obd_race_waitq);
 401 EXPORT_SYMBOL(obd_race_state);
 402 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 403 EXPORT_SYMBOL(obd_dump_on_timeout);
 404 EXPORT_SYMBOL(obd_dump_on_eviction);
 405 EXPORT_SYMBOL(obd_timeout);
 406 EXPORT_SYMBOL(ldlm_timeout);
 407 EXPORT_SYMBOL(obd_max_dirty_pages);
 408 EXPORT_SYMBOL(obd_dirty_pages);
 409 EXPORT_SYMBOL(obd_dirty_transit_pages);
 410 EXPORT_SYMBOL(at_min);
 411 EXPORT_SYMBOL(at_max);
 412 EXPORT_SYMBOL(at_extra);
 413 EXPORT_SYMBOL(at_early_margin);
 414 EXPORT_SYMBOL(at_history);
 415 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 416
 417 EXPORT_SYMBOL(proc_lustre_root);
 418
 419 EXPORT_SYMBOL(class_register_type);
 420 EXPORT_SYMBOL(class_unregister_type);
 421 EXPORT_SYMBOL(class_get_type);
 422 EXPORT_SYMBOL(class_put_type);
 423 EXPORT_SYMBOL(class_name2dev);
 424 EXPORT_SYMBOL(class_name2obd);
 425 EXPORT_SYMBOL(class_uuid2dev);
 426 EXPORT_SYMBOL(class_uuid2obd);
 427 EXPORT_SYMBOL(class_find_client_obd);
 428 EXPORT_SYMBOL(class_devices_in_group);
 429 EXPORT_SYMBOL(class_conn2export);
 430 EXPORT_SYMBOL(class_exp2obd);
 431 EXPORT_SYMBOL(class_conn2obd);
 432 EXPORT_SYMBOL(class_exp2cliimp);
 433 EXPORT_SYMBOL(class_conn2cliimp);
 434 EXPORT_SYMBOL(class_disconnect);
 435 EXPORT_SYMBOL(class_num2obd);
 436
 437 /* uuid.c */
 438 EXPORT_SYMBOL(class_uuid_unparse);
 439 EXPORT_SYMBOL(lustre_uuid_to_peer);
 440
 441 EXPORT_SYMBOL(class_handle_hash);
 442 EXPORT_SYMBOL(class_handle_unhash);
 443 EXPORT_SYMBOL(class_handle_hash_back);
 444 EXPORT_SYMBOL(class_handle2object);
 445 EXPORT_SYMBOL(class_handle_free_cb);
 446
 447 /* obd_config.c */
 448 EXPORT_SYMBOL(class_incref);
 449 EXPORT_SYMBOL(class_decref);
 450 EXPORT_SYMBOL(class_get_profile);
 451 EXPORT_SYMBOL(class_del_profile);
 452 EXPORT_SYMBOL(class_del_profiles);
 453 EXPORT_SYMBOL(class_process_config);
 454 EXPORT_SYMBOL(class_process_proc_param);
 455 EXPORT_SYMBOL(class_config_parse_llog);
 456 EXPORT_SYMBOL(class_config_dump_llog);
 457 EXPORT_SYMBOL(class_attach);
 458 EXPORT_SYMBOL(class_setup);
 459 EXPORT_SYMBOL(class_cleanup);
 460 EXPORT_SYMBOL(class_detach);
 461 EXPORT_SYMBOL(class_manual_cleanup);
 462
 463 /* mea.c */
 464 EXPORT_SYMBOL(mea_name2idx);
 465 EXPORT_SYMBOL(raw_name2idx);
 466
 467 #define OBD_INIT_CHECK
 468 #ifdef OBD_INIT_CHECK
 469 int obd_init_checks(void)
 470 {
 471         __u64 u64val, div64val;
 472         char buf[64];
 473         int len, ret = 0;
 474
 475         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 476
 477         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 478
 479         u64val = OBD_OBJECT_EOF;
 480         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 481         if (u64val != OBD_OBJECT_EOF) {
 482                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 483                        u64val, (int)sizeof(u64val));
 484                 ret = -EINVAL;
 485         }
 486         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 487         if (len != 18) {
 488                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 489                 ret = -EINVAL;
 490         }
 491
 492         div64val = OBD_OBJECT_EOF;
 493         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 494         if (u64val != OBD_OBJECT_EOF) {
 495                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 496                        u64val, (int)sizeof(u64val));
 497                 ret = -EOVERFLOW;
 498         }
 499         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 500                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 501                        u64val, (int)sizeof(u64val));
 502                 return -EOVERFLOW;
 503         }
 504         if (do_div(div64val, 256) != (u64val & 255)) {
 505                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 506                 return -EOVERFLOW;
 507         }
 508         if (u64val >> 8 != div64val) {
 509                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 510                        u64val, div64val, u64val >> 8);
 511                 return -EOVERFLOW;
 512         }
 513         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 514         if (len != 18) {
 515                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 516                 ret = -EINVAL;
 517         }
 518         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 519         if (len != 20) {
 520                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 521                 ret = -EINVAL;
 522         }
 523         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 524         if (len != 2) {
 525                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 526                 ret = -EINVAL;
 527         }
 528         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 529                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 530                       (__u64)CFS_PAGE_SIZE);
 531                 ret = -EINVAL;
 532         }
 533
 534         return ret;
 535 }
 536 #else
 537 #define obd_init_checks() do {} while(0)
 538 #endif
 539
 540 extern cfs_spinlock_t obd_types_lock;
 541 extern int class_procfs_init(void);
 542 extern int class_procfs_clean(void);
 543
 544 #ifdef __KERNEL__
 545 static int __init init_obdclass(void)
 546 #else
 547 int init_obdclass(void)
 548 #endif
 549 {
 550         int i, err;
 551 #ifdef __KERNEL__
 552         int lustre_register_fs(void);
 553
 554         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 555                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 556 #endif
 557
 558         LCONSOLE_INFO("OBD class driver, http://www.lustre.org/\n");
 559         LCONSOLE_INFO("        Lustre Version: "LUSTRE_VERSION_STRING"\n");
 560         LCONSOLE_INFO("        Build Version: "BUILD_VERSION"\n");
 561
 562         cfs_spin_lock_init(&obd_types_lock);
 563         cfs_waitq_init(&obd_race_waitq);
 564         obd_zombie_impexp_init();
 565 #ifdef LPROCFS
 566         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 567                                          LPROCFS_STATS_FLAG_NONE);
 568         if (obd_memory == NULL) {
 569                 CERROR("kmalloc of 'obd_memory' failed\n");
 570                 RETURN(-ENOMEM);
 571         }
 572
 573         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 574                              LPROCFS_CNTR_AVGMINMAX,
 575                              "memused", "bytes");
 576         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 577                              LPROCFS_CNTR_AVGMINMAX,
 578                              "pagesused", "pages");
 579 #endif
 580         err = obd_init_checks();
 581         if (err == -EOVERFLOW)
 582                 return err;
 583
 584         class_init_uuidlist();
 585         err = class_handle_init();
 586         if (err)
 587                 return err;
 588
 589         cfs_spin_lock_init(&obd_dev_lock);
 590         CFS_INIT_LIST_HEAD(&obd_types);
 591
 592         err = cfs_psdev_register(&obd_psdev);
 593         if (err) {
 594                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 595                 return err;
 596         }
 597
 598         /* This struct is already zeroed for us (static global) */
 599         for (i = 0; i < class_devno_max(); i++)
 600                 obd_devs[i] = NULL;
 601
 602         /* Default the dirty page cache cap to 1/2 of system memory.
 603          * For clients with less memory, a larger fraction is needed
 604          * for other purposes (mostly for BGL). */
 605         if (cfs_num_physpages <= 512 << (20 - CFS_PAGE_SHIFT))
 606                 obd_max_dirty_pages = cfs_num_physpages / 4;
 607         else
 608                 obd_max_dirty_pages = cfs_num_physpages / 2;
 609
 610         err = obd_init_caches();
 611         if (err)
 612                 return err;
 613 #ifdef __KERNEL__
 614         err = class_procfs_init();
 615         if (err)
 616                 return err;
 617 #endif
 618
 619         err = lu_global_init();
 620         if (err)
 621                 return err;
 622
 623 #ifdef __KERNEL__
 624         err = lustre_register_fs();
 625 #endif
 626
 627         return err;
 628 }
 629
 630 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 631  * ifdef to the end of the file to cover module and versioning goo.*/
 632 #ifdef __KERNEL__
 633 static void cleanup_obdclass(void)
 634 {
 635         int i;
 636         int lustre_unregister_fs(void);
 637         __u64 memory_leaked, pages_leaked;
 638         __u64 memory_max, pages_max;
 639         ENTRY;
 640
 641         lustre_unregister_fs();
 642
 643         cfs_psdev_deregister(&obd_psdev);
 644         for (i = 0; i < class_devno_max(); i++) {
 645                 struct obd_device *obd = class_num2obd(i);
 646                 if (obd && obd->obd_set_up &&
 647                     OBT(obd) && OBP(obd, detach)) {
 648                         /* XXX should this call generic detach otherwise? */
 649                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 650                         OBP(obd, detach)(obd);
 651                 }
 652         }
 653         lu_global_fini();
 654
 655         obd_cleanup_caches();
 656         obd_sysctl_clean();
 657
 658         class_procfs_clean();
 659
 660         class_handle_cleanup();
 661         class_exit_uuidlist();
 662         obd_zombie_impexp_stop();
 663
 664         memory_leaked = obd_memory_sum();
 665         pages_leaked = obd_pages_sum();
 666
 667         memory_max = obd_memory_max();
 668         pages_max = obd_pages_max();
 669
 670         lprocfs_free_stats(&obd_memory);
 671         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 672                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 673                memory_max, memory_leaked);
 674         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 675                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 676                pages_max, pages_leaked);
 677
 678         EXIT;
 679 }
 680
 681 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 682 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 683 MODULE_LICENSE("GPL");
 684
 685 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 686 #endif