lustre/obdclass/class_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, Whamcloud, Inc.
  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 __KERNEL__
  39 # include <liblustre.h>
  40 #else
  41 # include <asm/atomic.h>
  42 #endif
  43
  44 #include <obd_support.h>
  45 #include <obd_class.h>
  46 #include <lnet/lnetctl.h>
  47 #include <lustre_debug.h>
  48 #include <lprocfs_status.h>
  49 #include <lustre/lustre_build_version.h>
  50 #include <libcfs/list.h>
  51 #include "llog_internal.h"
  52
  53 #ifndef __KERNEL__
  54 /* liblustre workaround */
  55 cfs_atomic_t libcfs_kmemory = {0};
  56 #endif
  57
  58 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  59 cfs_list_t obd_types;
  60 cfs_rwlock_t obd_dev_lock = CFS_RW_LOCK_UNLOCKED;
  61
  62 #ifndef __KERNEL__
  63 __u64 obd_max_pages = 0;
  64 __u64 obd_max_alloc = 0;
  65 __u64 obd_alloc;
  66 __u64 obd_pages;
  67 #endif
  68
  69 /* The following are visible and mutable through /proc/sys/lustre/. */
  70 unsigned int obd_debug_peer_on_timeout;
  71 unsigned int obd_dump_on_timeout;
  72 unsigned int obd_dump_on_eviction;
  73 unsigned int obd_max_dirty_pages = 256;
  74 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  75 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  76 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  77 unsigned int at_min = 0;
  78 unsigned int at_max = 600;
  79 unsigned int at_history = 600;
  80 int at_early_margin = 5;
  81 int at_extra = 30;
  82
  83 cfs_atomic_t obd_dirty_pages;
  84 cfs_atomic_t obd_dirty_transit_pages;
  85
  86 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
  87 EXPORT_SYMBOL(obd_jobid_var);
  88
  89 /* Get jobid of current process by reading the environment variable
  90  * stored in between the "env_start" & "env_end" of task struct.
  91  *
  92  * TODO:
  93  * It's better to cache the jobid for later use if there is any
  94  * efficient way, the cl_env code probably could be reused for this
  95  * purpose.
  96  *
  97  * If some job scheduler doesn't store jobid in the "env_start/end",
  98  * then an upcall could be issued here to get the jobid by utilizing
  99  * the userspace tools/api. Then, the jobid must be cached.
 100  */
 101 int lustre_get_jobid(char *jobid)
 102 {
 103 #ifdef __KERNEL__
 104         int jobid_len = JOBSTATS_JOBID_SIZE;
 105 #endif
 106         int ret = 0;
 107         ENTRY;
 108
 109         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 110         /* Jobstats isn't enabled */
 111         if (!memcmp(obd_jobid_var, JOBSTATS_DISABLE,
 112                     strlen(JOBSTATS_DISABLE))) {
 113                 RETURN(0);
 114         }
 115
 116         /* Use process name + fsuid as jobid */
 117         if (!memcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID,
 118                     strlen(JOBSTATS_PROCNAME_UID))) {
 119                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s_%u",
 120                          cfs_curproc_comm(), cfs_curproc_fsuid());
 121                 RETURN(0);
 122         }
 123
 124 #ifdef __KERNEL__
 125         ret = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 126         if (ret) {
 127                 CDEBUG((ret != -ENOENT && ret != -EINVAL) ? D_ERROR : D_INFO,
 128                        "Get jobid for (%s) failed(%d).\n", obd_jobid_var, ret);
 129         }
 130 #endif
 131         RETURN(ret);
 132 }
 133 EXPORT_SYMBOL(lustre_get_jobid);
 134
 135 static inline void obd_data2conn(struct lustre_handle *conn,
 136                                  struct obd_ioctl_data *data)
 137 {
 138         memset(conn, 0, sizeof *conn);
 139         conn->cookie = data->ioc_cookie;
 140 }
 141
 142 static inline void obd_conn2data(struct obd_ioctl_data *data,
 143                                  struct lustre_handle *conn)
 144 {
 145         data->ioc_cookie = conn->cookie;
 146 }
 147
 148 int class_resolve_dev_name(__u32 len, const char *name)
 149 {
 150         int rc;
 151         int dev;
 152
 153         ENTRY;
 154         if (!len || !name) {
 155                 CERROR("No name passed,!\n");
 156                 GOTO(out, rc = -EINVAL);
 157         }
 158         if (name[len - 1] != 0) {
 159                 CERROR("Name not nul terminated!\n");
 160                 GOTO(out, rc = -EINVAL);
 161         }
 162
 163         CDEBUG(D_IOCTL, "device name %s\n", name);
 164         dev = class_name2dev(name);
 165         if (dev == -1) {
 166                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 167                 GOTO(out, rc = -EINVAL);
 168         }
 169
 170         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 171         rc = dev;
 172
 173 out:
 174         RETURN(rc);
 175 }
 176
 177 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 178 {
 179         char *buf = NULL;
 180         struct obd_ioctl_data *data;
 181         struct libcfs_debug_ioctl_data *debug_data;
 182         struct obd_device *obd = NULL;
 183         int err = 0, len = 0;
 184         ENTRY;
 185
 186         /* only for debugging */
 187         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 188                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 189                 libcfs_subsystem_debug = debug_data->subs;
 190                 libcfs_debug = debug_data->debug;
 191                 return 0;
 192         }
 193
 194         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 195         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 196                 CERROR("OBD ioctl: data error\n");
 197                 RETURN(-EINVAL);
 198         }
 199         data = (struct obd_ioctl_data *)buf;
 200
 201         switch (cmd) {
 202         case OBD_IOC_PROCESS_CFG: {
 203                 struct lustre_cfg *lcfg;
 204
 205                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 206                         CERROR("No config buffer passed!\n");
 207                         GOTO(out, err = -EINVAL);
 208                 }
 209                 OBD_ALLOC(lcfg, data->ioc_plen1);
 210                 if (lcfg == NULL)
 211                         GOTO(out, err = -ENOMEM);
 212                 err = cfs_copy_from_user(lcfg, data->ioc_pbuf1,
 213                                          data->ioc_plen1);
 214                 if (!err)
 215                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 216                 if (!err)
 217                         err = class_process_config(lcfg);
 218
 219                 OBD_FREE(lcfg, data->ioc_plen1);
 220                 GOTO(out, err);
 221         }
 222
 223         case OBD_GET_VERSION:
 224                 if (!data->ioc_inlbuf1) {
 225                         CERROR("No buffer passed in ioctl\n");
 226                         GOTO(out, err = -EINVAL);
 227                 }
 228
 229                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 230                         CERROR("ioctl buffer too small to hold version\n");
 231                         GOTO(out, err = -EINVAL);
 232                 }
 233
 234                 memcpy(data->ioc_bulk, BUILD_VERSION,
 235                        strlen(BUILD_VERSION) + 1);
 236
 237                 err = obd_ioctl_popdata((void *)arg, data, len);
 238                 if (err)
 239                         err = -EFAULT;
 240                 GOTO(out, err);
 241
 242         case OBD_IOC_NAME2DEV: {
 243                 /* Resolve a device name.  This does not change the
 244                  * currently selected device.
 245                  */
 246                 int dev;
 247
 248                 dev = class_resolve_dev_name(data->ioc_inllen1,
 249                                              data->ioc_inlbuf1);
 250                 data->ioc_dev = dev;
 251                 if (dev < 0)
 252                         GOTO(out, err = -EINVAL);
 253
 254                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 255                 if (err)
 256                         err = -EFAULT;
 257                 GOTO(out, err);
 258         }
 259
 260         case OBD_IOC_UUID2DEV: {
 261                 /* Resolve a device uuid.  This does not change the
 262                  * currently selected device.
 263                  */
 264                 int dev;
 265                 struct obd_uuid uuid;
 266
 267                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 268                         CERROR("No UUID passed!\n");
 269                         GOTO(out, err = -EINVAL);
 270                 }
 271                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 272                         CERROR("UUID not NUL terminated!\n");
 273                         GOTO(out, err = -EINVAL);
 274                 }
 275
 276                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 277                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 278                 dev = class_uuid2dev(&uuid);
 279                 data->ioc_dev = dev;
 280                 if (dev == -1) {
 281                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 282                                data->ioc_inlbuf1);
 283                         GOTO(out, err = -EINVAL);
 284                 }
 285
 286                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 287                        dev);
 288                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 289                 if (err)
 290                         err = -EFAULT;
 291                 GOTO(out, err);
 292         }
 293
 294         case OBD_IOC_CLOSE_UUID: {
 295                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 296                        data->ioc_inlbuf1);
 297                 GOTO(out, err = 0);
 298         }
 299
 300         case OBD_IOC_GETDEVICE: {
 301                 int     index = data->ioc_count;
 302                 char    *status, *str;
 303
 304                 if (!data->ioc_inlbuf1) {
 305                         CERROR("No buffer passed in ioctl\n");
 306                         GOTO(out, err = -EINVAL);
 307                 }
 308                 if (data->ioc_inllen1 < 128) {
 309                         CERROR("ioctl buffer too small to hold version\n");
 310                         GOTO(out, err = -EINVAL);
 311                 }
 312
 313                 obd = class_num2obd(index);
 314                 if (!obd)
 315                         GOTO(out, err = -ENOENT);
 316
 317                 if (obd->obd_stopping)
 318                         status = "ST";
 319                 else if (obd->obd_set_up)
 320                         status = "UP";
 321                 else if (obd->obd_attached)
 322                         status = "AT";
 323                 else
 324                         status = "--";
 325                 str = (char *)data->ioc_bulk;
 326                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 327                          (int)index, status, obd->obd_type->typ_name,
 328                          obd->obd_name, obd->obd_uuid.uuid,
 329                          cfs_atomic_read(&obd->obd_refcount));
 330                 err = obd_ioctl_popdata((void *)arg, data, len);
 331
 332                 GOTO(out, err = 0);
 333         }
 334
 335         }
 336
 337         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 338                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 339                         GOTO(out, err = -EINVAL);
 340                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 341                         GOTO(out, err = -EINVAL);
 342                 obd = class_name2obd(data->ioc_inlbuf4);
 343         } else if (data->ioc_dev < class_devno_max()) {
 344                 obd = class_num2obd(data->ioc_dev);
 345         } else {
 346                 CERROR("OBD ioctl: No device\n");
 347                 GOTO(out, err = -EINVAL);
 348         }
 349
 350         if (obd == NULL) {
 351                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 352                 GOTO(out, err = -EINVAL);
 353         }
 354         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 355
 356         if (!obd->obd_set_up || obd->obd_stopping) {
 357                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 358                 GOTO(out, err = -EINVAL);
 359         }
 360
 361         switch(cmd) {
 362         case OBD_IOC_NO_TRANSNO: {
 363                 if (!obd->obd_attached) {
 364                         CERROR("Device %d not attached\n", obd->obd_minor);
 365                         GOTO(out, err = -ENODEV);
 366                 }
 367                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 368                        obd->obd_name);
 369                 obd->obd_no_transno = 1;
 370                 GOTO(out, err = 0);
 371         }
 372
 373         default: {
 374                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 375                 if (err)
 376                         GOTO(out, err);
 377
 378                 err = obd_ioctl_popdata((void *)arg, data, len);
 379                 if (err)
 380                         err = -EFAULT;
 381                 GOTO(out, err);
 382         }
 383         }
 384
 385  out:
 386         if (buf)
 387                 obd_ioctl_freedata(buf, len);
 388         RETURN(err);
 389 } /* class_handle_ioctl */
 390
 391
 392
 393 #ifdef __KERNEL__
 394 extern cfs_psdev_t obd_psdev;
 395 #else
 396 void *obd_psdev = NULL;
 397 #endif
 398
 399 EXPORT_SYMBOL(obd_devs);
 400 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 401 EXPORT_SYMBOL(obd_dump_on_timeout);
 402 EXPORT_SYMBOL(obd_dump_on_eviction);
 403 EXPORT_SYMBOL(obd_timeout);
 404 EXPORT_SYMBOL(ldlm_timeout);
 405 EXPORT_SYMBOL(obd_max_dirty_pages);
 406 EXPORT_SYMBOL(obd_dirty_pages);
 407 EXPORT_SYMBOL(obd_dirty_transit_pages);
 408 EXPORT_SYMBOL(at_min);
 409 EXPORT_SYMBOL(at_max);
 410 EXPORT_SYMBOL(at_extra);
 411 EXPORT_SYMBOL(at_early_margin);
 412 EXPORT_SYMBOL(at_history);
 413 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 414 EXPORT_SYMBOL(proc_lustre_root);
 415
 416 /* uuid.c */
 417 EXPORT_SYMBOL(class_uuid_unparse);
 418 EXPORT_SYMBOL(lustre_uuid_to_peer);
 419
 420 EXPORT_SYMBOL(class_handle_hash);
 421 EXPORT_SYMBOL(class_handle_unhash);
 422 EXPORT_SYMBOL(class_handle_hash_back);
 423 EXPORT_SYMBOL(class_handle2object);
 424 EXPORT_SYMBOL(class_handle_free_cb);
 425
 426 /* obd_config.c */
 427 EXPORT_SYMBOL(class_incref);
 428 EXPORT_SYMBOL(class_decref);
 429 EXPORT_SYMBOL(class_get_profile);
 430 EXPORT_SYMBOL(class_del_profile);
 431 EXPORT_SYMBOL(class_del_profiles);
 432 EXPORT_SYMBOL(class_process_config);
 433 EXPORT_SYMBOL(class_process_proc_param);
 434 EXPORT_SYMBOL(class_config_parse_llog);
 435 EXPORT_SYMBOL(class_config_dump_llog);
 436 EXPORT_SYMBOL(class_attach);
 437 EXPORT_SYMBOL(class_setup);
 438 EXPORT_SYMBOL(class_cleanup);
 439 EXPORT_SYMBOL(class_detach);
 440 EXPORT_SYMBOL(class_manual_cleanup);
 441
 442 /* mea.c */
 443 EXPORT_SYMBOL(mea_name2idx);
 444 EXPORT_SYMBOL(raw_name2idx);
 445
 446 #define OBD_INIT_CHECK
 447 #ifdef OBD_INIT_CHECK
 448 int obd_init_checks(void)
 449 {
 450         __u64 u64val, div64val;
 451         char buf[64];
 452         int len, ret = 0;
 453
 454         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 455
 456         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 457
 458         u64val = OBD_OBJECT_EOF;
 459         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 460         if (u64val != OBD_OBJECT_EOF) {
 461                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 462                        u64val, (int)sizeof(u64val));
 463                 ret = -EINVAL;
 464         }
 465         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 466         if (len != 18) {
 467                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 468                 ret = -EINVAL;
 469         }
 470
 471         div64val = OBD_OBJECT_EOF;
 472         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 473         if (u64val != OBD_OBJECT_EOF) {
 474                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 475                        u64val, (int)sizeof(u64val));
 476                 ret = -EOVERFLOW;
 477         }
 478         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 479                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 480                        u64val, (int)sizeof(u64val));
 481                 return -EOVERFLOW;
 482         }
 483         if (do_div(div64val, 256) != (u64val & 255)) {
 484                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 485                 return -EOVERFLOW;
 486         }
 487         if (u64val >> 8 != div64val) {
 488                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 489                        u64val, div64val, u64val >> 8);
 490                 return -EOVERFLOW;
 491         }
 492         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 493         if (len != 18) {
 494                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 495                 ret = -EINVAL;
 496         }
 497         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 498         if (len != 20) {
 499                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 500                 ret = -EINVAL;
 501         }
 502         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 503         if (len != 2) {
 504                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 505                 ret = -EINVAL;
 506         }
 507         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 508                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 509                       (__u64)CFS_PAGE_SIZE);
 510                 ret = -EINVAL;
 511         }
 512
 513         return ret;
 514 }
 515 #else
 516 #define obd_init_checks() do {} while(0)
 517 #endif
 518
 519 extern cfs_spinlock_t obd_types_lock;
 520 extern int class_procfs_init(void);
 521 extern int class_procfs_clean(void);
 522
 523 #ifdef __KERNEL__
 524 static int __init init_obdclass(void)
 525 #else
 526 int init_obdclass(void)
 527 #endif
 528 {
 529         int i, err;
 530 #ifdef __KERNEL__
 531         int lustre_register_fs(void);
 532
 533         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 534                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 535 #endif
 536
 537         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 538
 539         cfs_spin_lock_init(&obd_types_lock);
 540         obd_zombie_impexp_init();
 541 #ifdef LPROCFS
 542         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 543                                          LPROCFS_STATS_FLAG_NONE);
 544         if (obd_memory == NULL) {
 545                 CERROR("kmalloc of 'obd_memory' failed\n");
 546                 RETURN(-ENOMEM);
 547         }
 548
 549         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 550                              LPROCFS_CNTR_AVGMINMAX,
 551                              "memused", "bytes");
 552         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 553                              LPROCFS_CNTR_AVGMINMAX,
 554                              "pagesused", "pages");
 555 #endif
 556         err = obd_init_checks();
 557         if (err == -EOVERFLOW)
 558                 return err;
 559
 560         class_init_uuidlist();
 561         err = class_handle_init();
 562         if (err)
 563                 return err;
 564
 565         CFS_INIT_LIST_HEAD(&obd_types);
 566
 567         err = cfs_psdev_register(&obd_psdev);
 568         if (err) {
 569                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 570                 return err;
 571         }
 572
 573         /* This struct is already zeroed for us (static global) */
 574         for (i = 0; i < class_devno_max(); i++)
 575                 obd_devs[i] = NULL;
 576
 577         /* Default the dirty page cache cap to 1/2 of system memory.
 578          * For clients with less memory, a larger fraction is needed
 579          * for other purposes (mostly for BGL). */
 580         if (cfs_num_physpages <= 512 << (20 - CFS_PAGE_SHIFT))
 581                 obd_max_dirty_pages = cfs_num_physpages / 4;
 582         else
 583                 obd_max_dirty_pages = cfs_num_physpages / 2;
 584
 585         err = obd_init_caches();
 586         if (err)
 587                 return err;
 588 #ifdef __KERNEL__
 589         err = class_procfs_init();
 590         if (err)
 591                 return err;
 592 #endif
 593
 594         err = lu_global_init();
 595         if (err)
 596                 return err;
 597
 598 #ifdef __KERNEL__
 599         err = lustre_register_fs();
 600 #endif
 601
 602         return err;
 603 }
 604
 605 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 606  * ifdef to the end of the file to cover module and versioning goo.*/
 607 #ifdef __KERNEL__
 608 static void cleanup_obdclass(void)
 609 {
 610         int i;
 611         int lustre_unregister_fs(void);
 612         __u64 memory_leaked, pages_leaked;
 613         __u64 memory_max, pages_max;
 614         ENTRY;
 615
 616         lustre_unregister_fs();
 617
 618         cfs_psdev_deregister(&obd_psdev);
 619         for (i = 0; i < class_devno_max(); i++) {
 620                 struct obd_device *obd = class_num2obd(i);
 621                 if (obd && obd->obd_set_up &&
 622                     OBT(obd) && OBP(obd, detach)) {
 623                         /* XXX should this call generic detach otherwise? */
 624                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 625                         OBP(obd, detach)(obd);
 626                 }
 627         }
 628         lu_global_fini();
 629
 630         obd_cleanup_caches();
 631         obd_sysctl_clean();
 632
 633         class_procfs_clean();
 634
 635         class_handle_cleanup();
 636         class_exit_uuidlist();
 637         obd_zombie_impexp_stop();
 638
 639         memory_leaked = obd_memory_sum();
 640         pages_leaked = obd_pages_sum();
 641
 642         memory_max = obd_memory_max();
 643         pages_max = obd_pages_max();
 644
 645         lprocfs_free_stats(&obd_memory);
 646         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 647                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 648                memory_max, memory_leaked);
 649         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 650                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 651                pages_max, pages_leaked);
 652
 653         EXIT;
 654 }
 655
 656 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 657 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 658 MODULE_LICENSE("GPL");
 659
 660 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 661 #endif