drivers/staging/lustre/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, 2012, Intel Corporation.
  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 # include <linux/atomic.h>
  39
  40 #include "../include/obd_support.h"
  41 #include "../include/obd_class.h"
  42 #include "../../include/linux/lnet/lnetctl.h"
  43 #include "../include/lustre_debug.h"
  44 #include "../include/lprocfs_status.h"
  45 #include "../include/lustre/lustre_build_version.h"
  46 #include <linux/list.h>
  47 #include "../include/cl_object.h"
  48 #include "llog_internal.h"
  49
  50
  51 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  52 EXPORT_SYMBOL(obd_devs);
  53 struct list_head obd_types;
  54 DEFINE_RWLOCK(obd_dev_lock);
  55
  56 __u64 obd_max_pages = 0;
  57 EXPORT_SYMBOL(obd_max_pages);
  58 __u64 obd_max_alloc = 0;
  59 EXPORT_SYMBOL(obd_max_alloc);
  60 __u64 obd_alloc;
  61 EXPORT_SYMBOL(obd_alloc);
  62 __u64 obd_pages;
  63 EXPORT_SYMBOL(obd_pages);
  64 DEFINE_SPINLOCK(obd_updatemax_lock);
  65
  66 /* The following are visible and mutable through /proc/sys/lustre/. */
  67 unsigned int obd_alloc_fail_rate = 0;
  68 EXPORT_SYMBOL(obd_alloc_fail_rate);
  69 unsigned int obd_debug_peer_on_timeout;
  70 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  71 unsigned int obd_dump_on_timeout;
  72 EXPORT_SYMBOL(obd_dump_on_timeout);
  73 unsigned int obd_dump_on_eviction;
  74 EXPORT_SYMBOL(obd_dump_on_eviction);
  75 unsigned int obd_max_dirty_pages = 256;
  76 EXPORT_SYMBOL(obd_max_dirty_pages);
  77 atomic_t obd_dirty_pages;
  78 EXPORT_SYMBOL(obd_dirty_pages);
  79 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  80 EXPORT_SYMBOL(obd_timeout);
  81 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  82 EXPORT_SYMBOL(ldlm_timeout);
  83 unsigned int obd_timeout_set;
  84 EXPORT_SYMBOL(obd_timeout_set);
  85 unsigned int ldlm_timeout_set;
  86 EXPORT_SYMBOL(ldlm_timeout_set);
  87 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  88 unsigned int at_min = 0;
  89 EXPORT_SYMBOL(at_min);
  90 unsigned int at_max = 600;
  91 EXPORT_SYMBOL(at_max);
  92 unsigned int at_history = 600;
  93 EXPORT_SYMBOL(at_history);
  94 int at_early_margin = 5;
  95 EXPORT_SYMBOL(at_early_margin);
  96 int at_extra = 30;
  97 EXPORT_SYMBOL(at_extra);
  98
  99 atomic_t obd_dirty_transit_pages;
 100 EXPORT_SYMBOL(obd_dirty_transit_pages);
 101
 102 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 103 EXPORT_SYMBOL(obd_jobid_var);
 104
 105 char obd_jobid_node[JOBSTATS_JOBID_SIZE + 1];
 106
 107 /* Get jobid of current process from stored variable or calculate
 108  * it from pid and user_id.
 109  *
 110  * Historically this was also done by reading the environment variable
 111  * stored in between the "env_start" & "env_end" of task struct.
 112  * This is now deprecated.
 113  */
 114 int lustre_get_jobid(char *jobid)
 115 {
 116         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 117         /* Jobstats isn't enabled */
 118         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 119                 return 0;
 120
 121         /* Use process name + fsuid as jobid */
 122         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 123                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 124                          current_comm(),
 125                          from_kuid(&init_user_ns, current_fsuid()));
 126                 return 0;
 127         }
 128
 129         /* Whole node dedicated to single job */
 130         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) {
 131                 strcpy(jobid, obd_jobid_node);
 132                 return 0;
 133         }
 134
 135         return -ENOENT;
 136 }
 137 EXPORT_SYMBOL(lustre_get_jobid);
 138
 139 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 140                    size_t size, const char *file, int line)
 141 {
 142         if (ptr == NULL ||
 143             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 144                 CERROR("%s%salloc of %s (%llu bytes) failed at %s:%d\n",
 145                        ptr ? "force " :"", type, name, (__u64)size, file,
 146                        line);
 147                 CERROR("%llu total bytes and %llu total pages "
 148                        "(%llu bytes) allocated by Lustre, "
 149                        "%d total bytes by LNET\n",
 150                        obd_memory_sum(),
 151                        obd_pages_sum() << PAGE_CACHE_SHIFT,
 152                        obd_pages_sum(),
 153                         atomic_read(&libcfs_kmemory));
 154                 return 1;
 155         }
 156         return 0;
 157 }
 158 EXPORT_SYMBOL(obd_alloc_fail);
 159
 160 static inline void obd_data2conn(struct lustre_handle *conn,
 161                                  struct obd_ioctl_data *data)
 162 {
 163         memset(conn, 0, sizeof(*conn));
 164         conn->cookie = data->ioc_cookie;
 165 }
 166
 167 static inline void obd_conn2data(struct obd_ioctl_data *data,
 168                                  struct lustre_handle *conn)
 169 {
 170         data->ioc_cookie = conn->cookie;
 171 }
 172
 173 int class_resolve_dev_name(__u32 len, const char *name)
 174 {
 175         int rc;
 176         int dev;
 177
 178         if (!len || !name) {
 179                 CERROR("No name passed,!\n");
 180                 rc = -EINVAL;
 181                 goto out;
 182         }
 183         if (name[len - 1] != 0) {
 184                 CERROR("Name not nul terminated!\n");
 185                 rc = -EINVAL;
 186                 goto out;
 187         }
 188
 189         CDEBUG(D_IOCTL, "device name %s\n", name);
 190         dev = class_name2dev(name);
 191         if (dev == -1) {
 192                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 193                 rc = -EINVAL;
 194                 goto out;
 195         }
 196
 197         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 198         rc = dev;
 199
 200 out:
 201         return rc;
 202 }
 203
 204 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 205 {
 206         char *buf = NULL;
 207         struct obd_ioctl_data *data;
 208         struct libcfs_debug_ioctl_data *debug_data;
 209         struct obd_device *obd = NULL;
 210         int err = 0, len = 0;
 211
 212         /* only for debugging */
 213         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 214                 debug_data = (struct libcfs_debug_ioctl_data *)arg;
 215                 libcfs_subsystem_debug = debug_data->subs;
 216                 libcfs_debug = debug_data->debug;
 217                 return 0;
 218         }
 219
 220         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 221         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 222                 CERROR("OBD ioctl: data error\n");
 223                 return -EINVAL;
 224         }
 225         data = (struct obd_ioctl_data *)buf;
 226
 227         switch (cmd) {
 228         case OBD_IOC_PROCESS_CFG: {
 229                 struct lustre_cfg *lcfg;
 230
 231                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 232                         CERROR("No config buffer passed!\n");
 233                         err = -EINVAL;
 234                         goto out;
 235                 }
 236                 OBD_ALLOC(lcfg, data->ioc_plen1);
 237                 if (lcfg == NULL) {
 238                         err = -ENOMEM;
 239                         goto out;
 240                 }
 241                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 242                                          data->ioc_plen1);
 243                 if (!err)
 244                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 245                 if (!err)
 246                         err = class_process_config(lcfg);
 247
 248                 OBD_FREE(lcfg, data->ioc_plen1);
 249                 goto out;
 250         }
 251
 252         case OBD_GET_VERSION:
 253                 if (!data->ioc_inlbuf1) {
 254                         CERROR("No buffer passed in ioctl\n");
 255                         err = -EINVAL;
 256                         goto out;
 257                 }
 258
 259                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 260                         CERROR("ioctl buffer too small to hold version\n");
 261                         err = -EINVAL;
 262                         goto out;
 263                 }
 264
 265                 memcpy(data->ioc_bulk, BUILD_VERSION,
 266                        strlen(BUILD_VERSION) + 1);
 267
 268                 err = obd_ioctl_popdata((void *)arg, data, len);
 269                 if (err)
 270                         err = -EFAULT;
 271                 goto out;
 272
 273         case OBD_IOC_NAME2DEV: {
 274                 /* Resolve a device name.  This does not change the
 275                  * currently selected device.
 276                  */
 277                 int dev;
 278
 279                 dev = class_resolve_dev_name(data->ioc_inllen1,
 280                                              data->ioc_inlbuf1);
 281                 data->ioc_dev = dev;
 282                 if (dev < 0) {
 283                         err = -EINVAL;
 284                         goto out;
 285                 }
 286
 287                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 288                 if (err)
 289                         err = -EFAULT;
 290                 goto out;
 291         }
 292
 293         case OBD_IOC_UUID2DEV: {
 294                 /* Resolve a device uuid.  This does not change the
 295                  * currently selected device.
 296                  */
 297                 int dev;
 298                 struct obd_uuid uuid;
 299
 300                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 301                         CERROR("No UUID passed!\n");
 302                         err = -EINVAL;
 303                         goto out;
 304                 }
 305                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 306                         CERROR("UUID not NUL terminated!\n");
 307                         err = -EINVAL;
 308                         goto out;
 309                 }
 310
 311                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 312                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 313                 dev = class_uuid2dev(&uuid);
 314                 data->ioc_dev = dev;
 315                 if (dev == -1) {
 316                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 317                                data->ioc_inlbuf1);
 318                         err = -EINVAL;
 319                         goto out;
 320                 }
 321
 322                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 323                        dev);
 324                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 325                 if (err)
 326                         err = -EFAULT;
 327                 goto out;
 328         }
 329
 330         case OBD_IOC_CLOSE_UUID: {
 331                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 332                        data->ioc_inlbuf1);
 333                 err = 0;
 334                 goto out;
 335         }
 336
 337         case OBD_IOC_GETDEVICE: {
 338                 int     index = data->ioc_count;
 339                 char    *status, *str;
 340
 341                 if (!data->ioc_inlbuf1) {
 342                         CERROR("No buffer passed in ioctl\n");
 343                         err = -EINVAL;
 344                         goto out;
 345                 }
 346                 if (data->ioc_inllen1 < 128) {
 347                         CERROR("ioctl buffer too small to hold version\n");
 348                         err = -EINVAL;
 349                         goto out;
 350                 }
 351
 352                 obd = class_num2obd(index);
 353                 if (!obd) {
 354                         err = -ENOENT;
 355                         goto out;
 356                 }
 357
 358                 if (obd->obd_stopping)
 359                         status = "ST";
 360                 else if (obd->obd_set_up)
 361                         status = "UP";
 362                 else if (obd->obd_attached)
 363                         status = "AT";
 364                 else
 365                         status = "--";
 366                 str = (char *)data->ioc_bulk;
 367                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 368                          (int)index, status, obd->obd_type->typ_name,
 369                          obd->obd_name, obd->obd_uuid.uuid,
 370                          atomic_read(&obd->obd_refcount));
 371                 err = obd_ioctl_popdata((void *)arg, data, len);
 372
 373                 err = 0;
 374                 goto out;
 375         }
 376
 377         }
 378
 379         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 380                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL) {
 381                         err = -EINVAL;
 382                         goto out;
 383                 }
 384                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME) {
 385                         err = -EINVAL;
 386                         goto out;
 387                 }
 388                 obd = class_name2obd(data->ioc_inlbuf4);
 389         } else if (data->ioc_dev < class_devno_max()) {
 390                 obd = class_num2obd(data->ioc_dev);
 391         } else {
 392                 CERROR("OBD ioctl: No device\n");
 393                 err = -EINVAL;
 394                 goto out;
 395         }
 396
 397         if (obd == NULL) {
 398                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 399                 err = -EINVAL;
 400                 goto out;
 401         }
 402         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 403
 404         if (!obd->obd_set_up || obd->obd_stopping) {
 405                 CERROR("OBD ioctl: device not setup %d\n", data->ioc_dev);
 406                 err = -EINVAL;
 407                 goto out;
 408         }
 409
 410         switch (cmd) {
 411         case OBD_IOC_NO_TRANSNO: {
 412                 if (!obd->obd_attached) {
 413                         CERROR("Device %d not attached\n", obd->obd_minor);
 414                         err = -ENODEV;
 415                         goto out;
 416                 }
 417                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 418                        obd->obd_name);
 419                 obd->obd_no_transno = 1;
 420                 err = 0;
 421                 goto out;
 422         }
 423
 424         default: {
 425                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 426                 if (err)
 427                         goto out;
 428
 429                 err = obd_ioctl_popdata((void *)arg, data, len);
 430                 if (err)
 431                         err = -EFAULT;
 432                 goto out;
 433         }
 434         }
 435
 436  out:
 437         if (buf)
 438                 obd_ioctl_freedata(buf, len);
 439         return err;
 440 } /* class_handle_ioctl */
 441
 442 extern struct miscdevice obd_psdev;
 443
 444 #define OBD_INIT_CHECK
 445 int obd_init_checks(void)
 446 {
 447         __u64 u64val, div64val;
 448         char buf[64];
 449         int len, ret = 0;
 450
 451         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", "%llu", "%lld", "%#llx");
 452
 453         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
 454
 455         u64val = OBD_OBJECT_EOF;
 456         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 457         if (u64val != OBD_OBJECT_EOF) {
 458                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 459                        u64val, (int)sizeof(u64val));
 460                 ret = -EINVAL;
 461         }
 462         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 463         if (len != 18) {
 464                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 465                 ret = -EINVAL;
 466         }
 467
 468         div64val = OBD_OBJECT_EOF;
 469         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 470         if (u64val != OBD_OBJECT_EOF) {
 471                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 472                        u64val, (int)sizeof(u64val));
 473                 ret = -EOVERFLOW;
 474         }
 475         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 476                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 477                        u64val, (int)sizeof(u64val));
 478                 return -EOVERFLOW;
 479         }
 480         if (do_div(div64val, 256) != (u64val & 255)) {
 481                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val &255);
 482                 return -EOVERFLOW;
 483         }
 484         if (u64val >> 8 != div64val) {
 485                 CERROR("do_div(%#llx,256) %llu != %llu\n",
 486                        u64val, div64val, u64val >> 8);
 487                 return -EOVERFLOW;
 488         }
 489         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 490         if (len != 18) {
 491                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 492                 ret = -EINVAL;
 493         }
 494         len = snprintf(buf, sizeof(buf), "%llu", u64val);
 495         if (len != 20) {
 496                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 497                 ret = -EINVAL;
 498         }
 499         len = snprintf(buf, sizeof(buf), "%lld", u64val);
 500         if (len != 2) {
 501                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 502                 ret = -EINVAL;
 503         }
 504         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 505                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
 506                       (__u64)PAGE_CACHE_SIZE);
 507                 ret = -EINVAL;
 508         }
 509
 510         return ret;
 511 }
 512
 513 extern spinlock_t obd_types_lock;
 514 #if defined (CONFIG_PROC_FS)
 515 extern int class_procfs_init(void);
 516 extern int class_procfs_clean(void);
 517 #else
 518 static inline int class_procfs_init(void)
 519 { return 0; }
 520 static inline int class_procfs_clean(void)
 521 { return 0; }
 522 #endif
 523
 524 static int __init init_obdclass(void)
 525 {
 526         int i, err;
 527         int lustre_register_fs(void);
 528
 529         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 530                 INIT_LIST_HEAD(&capa_list[i]);
 531
 532         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 533
 534         spin_lock_init(&obd_types_lock);
 535         obd_zombie_impexp_init();
 536
 537         if (IS_ENABLED(CONFIG_PROC_FS)) {
 538                 obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 539                                                  LPROCFS_STATS_FLAG_NONE |
 540                                                  LPROCFS_STATS_FLAG_IRQ_SAFE);
 541
 542                 if (obd_memory == NULL) {
 543                         CERROR("kmalloc of 'obd_memory' failed\n");
 544                         return -ENOMEM;
 545                 }
 546
 547                 lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 548                                      LPROCFS_CNTR_AVGMINMAX,
 549                                      "memused", "bytes");
 550                 lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 551                                      LPROCFS_CNTR_AVGMINMAX,
 552                                      "pagesused", "pages");
 553         }
 554
 555         err = obd_init_checks();
 556         if (err == -EOVERFLOW)
 557                 return err;
 558
 559         class_init_uuidlist();
 560         err = class_handle_init();
 561         if (err)
 562                 return err;
 563
 564         INIT_LIST_HEAD(&obd_types);
 565
 566         err = misc_register(&obd_psdev);
 567         if (err) {
 568                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 569                 return err;
 570         }
 571
 572         /* This struct is already zeroed for us (static global) */
 573         for (i = 0; i < class_devno_max(); i++)
 574                 obd_devs[i] = NULL;
 575
 576         /* Default the dirty page cache cap to 1/2 of system memory.
 577          * For clients with less memory, a larger fraction is needed
 578          * for other purposes (mostly for BGL). */
 579         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 580                 obd_max_dirty_pages = totalram_pages / 4;
 581         else
 582                 obd_max_dirty_pages = totalram_pages / 2;
 583
 584         err = obd_init_caches();
 585         if (err)
 586                 return err;
 587
 588         obd_sysctl_init();
 589
 590         err = class_procfs_init();
 591         if (err)
 592                 return err;
 593
 594         err = lu_global_init();
 595         if (err)
 596                 return err;
 597
 598         err = cl_global_init();
 599         if (err != 0)
 600                 return err;
 601
 602
 603         err = llog_info_init();
 604         if (err)
 605                 return err;
 606
 607         err = lustre_register_fs();
 608
 609         return err;
 610 }
 611
 612 void obd_update_maxusage(void)
 613 {
 614         __u64 max1, max2;
 615
 616         max1 = obd_pages_sum();
 617         max2 = obd_memory_sum();
 618
 619         spin_lock(&obd_updatemax_lock);
 620         if (max1 > obd_max_pages)
 621                 obd_max_pages = max1;
 622         if (max2 > obd_max_alloc)
 623                 obd_max_alloc = max2;
 624         spin_unlock(&obd_updatemax_lock);
 625 }
 626 EXPORT_SYMBOL(obd_update_maxusage);
 627
 628 #if defined (CONFIG_PROC_FS)
 629 __u64 obd_memory_max(void)
 630 {
 631         __u64 ret;
 632
 633         spin_lock(&obd_updatemax_lock);
 634         ret = obd_max_alloc;
 635         spin_unlock(&obd_updatemax_lock);
 636
 637         return ret;
 638 }
 639 EXPORT_SYMBOL(obd_memory_max);
 640
 641 __u64 obd_pages_max(void)
 642 {
 643         __u64 ret;
 644
 645         spin_lock(&obd_updatemax_lock);
 646         ret = obd_max_pages;
 647         spin_unlock(&obd_updatemax_lock);
 648
 649         return ret;
 650 }
 651 EXPORT_SYMBOL(obd_pages_max);
 652 #endif
 653
 654 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 655  * ifdef to the end of the file to cover module and versioning goo.*/
 656 static void cleanup_obdclass(void)
 657 {
 658         int i;
 659         int lustre_unregister_fs(void);
 660         __u64 memory_leaked, pages_leaked;
 661         __u64 memory_max, pages_max;
 662
 663         lustre_unregister_fs();
 664
 665         misc_deregister(&obd_psdev);
 666         for (i = 0; i < class_devno_max(); i++) {
 667                 struct obd_device *obd = class_num2obd(i);
 668                 if (obd && obd->obd_set_up &&
 669                     OBT(obd) && OBP(obd, detach)) {
 670                         /* XXX should this call generic detach otherwise? */
 671                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 672                         OBP(obd, detach)(obd);
 673                 }
 674         }
 675         llog_info_fini();
 676         cl_global_fini();
 677         lu_global_fini();
 678
 679         obd_cleanup_caches();
 680         obd_sysctl_clean();
 681
 682         class_procfs_clean();
 683
 684         class_handle_cleanup();
 685         class_exit_uuidlist();
 686         obd_zombie_impexp_stop();
 687
 688         memory_leaked = obd_memory_sum();
 689         pages_leaked = obd_pages_sum();
 690
 691         memory_max = obd_memory_max();
 692         pages_max = obd_pages_max();
 693
 694         lprocfs_free_stats(&obd_memory);
 695         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 696                "obd_memory max: %llu, leaked: %llu\n",
 697                memory_max, memory_leaked);
 698         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 699                "obd_memory_pages max: %llu, leaked: %llu\n",
 700                pages_max, pages_leaked);
 701 }
 702
 703 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 704 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 705 MODULE_LICENSE("GPL");
 706 MODULE_VERSION(LUSTRE_VERSION_STRING);
 707
 708 module_init(init_obdclass);
 709 module_exit(cleanup_obdclass);