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