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