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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2015, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_CLASS
  34
  35 #include <linux/user_namespace.h>
  36 #ifdef HAVE_UIDGID_HEADER
  37 # include <linux/uidgid.h>
  38 #endif
  39 #include <linux/atomic.h>
  40 #include <linux/list.h>
  41
  42 #include <obd_support.h>
  43 #include <obd_class.h>
  44 #include <lnet/lnetctl.h>
  45 #include <lustre_debug.h>
  46 #include <lustre_kernelcomm.h>
  47 #include <lprocfs_status.h>
  48 #include <lustre_ver.h>
  49 #include <cl_object.h>
  50 #ifdef HAVE_SERVER_SUPPORT
  51 # include <dt_object.h>
  52 # include <md_object.h>
  53 #endif /* HAVE_SERVER_SUPPORT */
  54 #include <uapi/linux/lustre_ioctl.h>
  55 #include "llog_internal.h"
  56
  57 #ifdef CONFIG_PROC_FS
  58 static __u64 obd_max_alloc;
  59 #else
  60 __u64 obd_max_alloc;
  61 #endif
  62
  63 static DEFINE_SPINLOCK(obd_updatemax_lock);
  64
  65 /* The following are visible and mutable through /proc/sys/lustre/. */
  66 unsigned int obd_debug_peer_on_timeout;
  67 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  68 unsigned int obd_dump_on_timeout;
  69 EXPORT_SYMBOL(obd_dump_on_timeout);
  70 unsigned int obd_dump_on_eviction;
  71 EXPORT_SYMBOL(obd_dump_on_eviction);
  72 unsigned long obd_max_dirty_pages;
  73 EXPORT_SYMBOL(obd_max_dirty_pages);
  74 atomic_long_t obd_dirty_pages;
  75 EXPORT_SYMBOL(obd_dirty_pages);
  76 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  77 EXPORT_SYMBOL(obd_timeout);
  78 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  79 EXPORT_SYMBOL(ldlm_timeout);
  80 unsigned int obd_timeout_set;
  81 EXPORT_SYMBOL(obd_timeout_set);
  82 unsigned int ldlm_timeout_set;
  83 EXPORT_SYMBOL(ldlm_timeout_set);
  84 /* bulk transfer timeout, give up after 100s by default */
  85 unsigned int bulk_timeout = 100; /* seconds */
  86 EXPORT_SYMBOL(bulk_timeout);
  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_long_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
 104 #ifdef CONFIG_PROC_FS
 105 struct lprocfs_stats *obd_memory = NULL;
 106 EXPORT_SYMBOL(obd_memory);
 107 #endif
 108
 109 char obd_jobid_node[LUSTRE_JOBID_SIZE + 1];
 110
 111 /* Get jobid of current process by reading the environment variable
 112  * stored in between the "env_start" & "env_end" of task struct.
 113  *
 114  * TODO:
 115  * It's better to cache the jobid for later use if there is any
 116  * efficient way, the cl_env code probably could be reused for this
 117  * purpose.
 118  *
 119  * If some job scheduler doesn't store jobid in the "env_start/end",
 120  * then an upcall could be issued here to get the jobid by utilizing
 121  * the userspace tools/api. Then, the jobid must be cached.
 122  */
 123 int lustre_get_jobid(char *jobid)
 124 {
 125         int jobid_len = LUSTRE_JOBID_SIZE;
 126         char tmp_jobid[LUSTRE_JOBID_SIZE] = { 0 };
 127         int rc = 0;
 128         ENTRY;
 129
 130         /* Jobstats isn't enabled */
 131         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 132                 GOTO(out, rc = 0);
 133
 134         /* Whole node dedicated to single job */
 135         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) {
 136                 memcpy(tmp_jobid, obd_jobid_node, LUSTRE_JOBID_SIZE);
 137                 GOTO(out, rc = 0);
 138         }
 139
 140         /* Use process name + fsuid as jobid */
 141         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 142                 snprintf(tmp_jobid, LUSTRE_JOBID_SIZE, "%s.%u",
 143                          current_comm(),
 144                          from_kuid(&init_user_ns, current_fsuid()));
 145                 GOTO(out, rc = 0);
 146         }
 147
 148         rc = cfs_get_environ(obd_jobid_var, tmp_jobid, &jobid_len);
 149         if (rc) {
 150                 if (rc == -EOVERFLOW) {
 151                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 152                          * variable length strings instead of just numbers), it
 153                          * might make sense to keep the unique parts for JobID,
 154                          * instead of just returning an error.  That means a
 155                          * larger temp buffer for cfs_get_environ(), then
 156                          * truncating the string at some separator to fit into
 157                          * the specified jobid_len.  Fix later if needed. */
 158                         static bool printed;
 159                         if (unlikely(!printed)) {
 160                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 161                                                    "for JobID buffer (%d)\n",
 162                                                    obd_jobid_var, jobid_len);
 163                                 printed = true;
 164                         }
 165                 } else {
 166                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 167                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 168                                "Get jobid for (%s) failed: rc = %d\n",
 169                                obd_jobid_var, rc);
 170                 }
 171         }
 172
 173 out:
 174         if (rc != 0)
 175                 RETURN(rc);
 176
 177         /* Only replace the job ID if it changed. */
 178         if (strcmp(jobid, tmp_jobid) != 0)
 179                 memcpy(jobid, tmp_jobid, jobid_len);
 180
 181         RETURN(0);
 182 }
 183 EXPORT_SYMBOL(lustre_get_jobid);
 184
 185 static int class_resolve_dev_name(__u32 len, const char *name)
 186 {
 187         int rc;
 188         int dev;
 189
 190         ENTRY;
 191         if (!len || !name) {
 192                 CERROR("No name passed,!\n");
 193                 GOTO(out, rc = -EINVAL);
 194         }
 195         if (name[len - 1] != 0) {
 196                 CERROR("Name not nul terminated!\n");
 197                 GOTO(out, rc = -EINVAL);
 198         }
 199
 200         CDEBUG(D_IOCTL, "device name %s\n", name);
 201         dev = class_name2dev(name);
 202         if (dev == -1) {
 203                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 204                 GOTO(out, rc = -EINVAL);
 205         }
 206
 207         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 208         rc = dev;
 209
 210 out:
 211         RETURN(rc);
 212 }
 213
 214 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 215 {
 216         char *buf = NULL;
 217         struct obd_ioctl_data *data;
 218         struct libcfs_debug_ioctl_data *debug_data;
 219         struct obd_device *obd = NULL;
 220         int err = 0, len = 0;
 221         ENTRY;
 222
 223         /* only for debugging */
 224         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 225                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 226                 libcfs_subsystem_debug = debug_data->subs;
 227                 libcfs_debug = debug_data->debug;
 228                 return 0;
 229         }
 230
 231         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 232         if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
 233                 CERROR("OBD ioctl: data error\n");
 234                 RETURN(-EINVAL);
 235         }
 236         data = (struct obd_ioctl_data *)buf;
 237
 238         switch (cmd) {
 239         case OBD_IOC_PROCESS_CFG: {
 240                 struct lustre_cfg *lcfg;
 241
 242                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 243                         CERROR("No config buffer passed!\n");
 244                         GOTO(out, err = -EINVAL);
 245                 }
 246                 OBD_ALLOC(lcfg, data->ioc_plen1);
 247                 if (lcfg == NULL)
 248                         GOTO(out, err = -ENOMEM);
 249                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 250                                          data->ioc_plen1);
 251                 if (!err)
 252                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 253                 if (!err)
 254                         err = class_process_config(lcfg);
 255
 256                 OBD_FREE(lcfg, data->ioc_plen1);
 257                 GOTO(out, err);
 258         }
 259
 260         case OBD_GET_VERSION:
 261                 if (!data->ioc_inlbuf1) {
 262                         CERROR("No buffer passed in ioctl\n");
 263                         GOTO(out, err = -EINVAL);
 264                 }
 265
 266                 if (strlen(LUSTRE_VERSION_STRING) + 1 > data->ioc_inllen1) {
 267                         CERROR("ioctl buffer too small to hold version\n");
 268                         GOTO(out, err = -EINVAL);
 269                 }
 270
 271                 memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING,
 272                        strlen(LUSTRE_VERSION_STRING) + 1);
 273
 274                 if (copy_to_user((void __user *)arg, data, len))
 275                         err = -EFAULT;
 276                 GOTO(out, err);
 277
 278         case OBD_IOC_NAME2DEV: {
 279                 /* Resolve a device name.  This does not change the
 280                  * currently selected device.
 281                  */
 282                 int dev;
 283
 284                 dev = class_resolve_dev_name(data->ioc_inllen1,
 285                                              data->ioc_inlbuf1);
 286                 data->ioc_dev = dev;
 287                 if (dev < 0)
 288                         GOTO(out, err = -EINVAL);
 289
 290                 if (copy_to_user((void __user *)arg, data, sizeof(*data)))
 291                         err = -EFAULT;
 292                 GOTO(out, err);
 293         }
 294
 295         case OBD_IOC_UUID2DEV: {
 296                 /* Resolve a device uuid.  This does not change the
 297                  * currently selected device.
 298                  */
 299                 int dev;
 300                 struct obd_uuid uuid;
 301
 302                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 303                         CERROR("No UUID passed!\n");
 304                         GOTO(out, err = -EINVAL);
 305                 }
 306                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 307                         CERROR("UUID not NUL terminated!\n");
 308                         GOTO(out, err = -EINVAL);
 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                         GOTO(out, err = -EINVAL);
 319                 }
 320
 321                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 322                        dev);
 323                 if (copy_to_user((void __user *)arg, data, sizeof(*data)))
 324                         err = -EFAULT;
 325                 GOTO(out, err);
 326         }
 327
 328         case OBD_IOC_GETDEVICE: {
 329                 int     index = data->ioc_count;
 330                 char    *status, *str;
 331
 332                 if (!data->ioc_inlbuf1) {
 333                         CERROR("No buffer passed in ioctl\n");
 334                         GOTO(out, err = -EINVAL);
 335                 }
 336                 if (data->ioc_inllen1 < 128) {
 337                         CERROR("ioctl buffer too small to hold version\n");
 338                         GOTO(out, err = -EINVAL);
 339                 }
 340
 341                 obd = class_num2obd(index);
 342                 if (!obd)
 343                         GOTO(out, err = -ENOENT);
 344
 345                 if (obd->obd_stopping)
 346                         status = "ST";
 347                 else if (obd->obd_set_up)
 348                         status = "UP";
 349                 else if (obd->obd_attached)
 350                         status = "AT";
 351                 else
 352                         status = "--";
 353                 str = (char *)data->ioc_bulk;
 354                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 355                          (int)index, status, obd->obd_type->typ_name,
 356                          obd->obd_name, obd->obd_uuid.uuid,
 357                          atomic_read(&obd->obd_refcount));
 358
 359                 if (copy_to_user((void __user *)arg, data, len))
 360                         err = -EFAULT;
 361
 362                 GOTO(out, err);
 363         }
 364
 365         }
 366
 367         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 368                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 369                         GOTO(out, err = -EINVAL);
 370                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 371                         GOTO(out, err = -EINVAL);
 372                 obd = class_name2obd(data->ioc_inlbuf4);
 373         } else if (data->ioc_dev < class_devno_max()) {
 374                 obd = class_num2obd(data->ioc_dev);
 375         } else {
 376                 CERROR("OBD ioctl: No device\n");
 377                 GOTO(out, err = -EINVAL);
 378         }
 379
 380         if (obd == NULL) {
 381                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 382                 GOTO(out, err = -EINVAL);
 383         }
 384         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 385
 386         if (!obd->obd_set_up || obd->obd_stopping) {
 387                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 388                 GOTO(out, err = -EINVAL);
 389         }
 390
 391         switch(cmd) {
 392         case OBD_IOC_NO_TRANSNO: {
 393                 if (!obd->obd_attached) {
 394                         CERROR("Device %d not attached\n", obd->obd_minor);
 395                         GOTO(out, err = -ENODEV);
 396                 }
 397                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 398                        obd->obd_name);
 399                 obd->obd_no_transno = 1;
 400                 GOTO(out, err = 0);
 401         }
 402
 403         default: {
 404                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 405                 if (err)
 406                         GOTO(out, err);
 407
 408                 if (copy_to_user((void __user *)arg, data, len))
 409                         err = -EFAULT;
 410                 GOTO(out, err);
 411         }
 412         }
 413
 414 out:
 415         OBD_FREE_LARGE(buf, len);
 416         RETURN(err);
 417 } /* class_handle_ioctl */
 418
 419 #define OBD_INIT_CHECK
 420 #ifdef OBD_INIT_CHECK
 421 static int obd_init_checks(void)
 422 {
 423         __u64 u64val, div64val;
 424         char buf[64];
 425         int len, ret = 0;
 426
 427         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
 428
 429         u64val = OBD_OBJECT_EOF;
 430         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 431         if (u64val != OBD_OBJECT_EOF) {
 432                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 433                        u64val, (int)sizeof(u64val));
 434                 ret = -EINVAL;
 435         }
 436         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 437         if (len != 18) {
 438                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 439                 ret = -EINVAL;
 440         }
 441
 442         div64val = OBD_OBJECT_EOF;
 443         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 444         if (u64val != OBD_OBJECT_EOF) {
 445                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 446                        u64val, (int)sizeof(u64val));
 447                 ret = -EOVERFLOW;
 448         }
 449         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 450                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 451                        u64val, (int)sizeof(u64val));
 452                 return -EOVERFLOW;
 453         }
 454         if (do_div(div64val, 256) != (u64val & 255)) {
 455                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255);
 456                 return -EOVERFLOW;
 457         }
 458         if (u64val >> 8 != div64val) {
 459                 CERROR("do_div(%#llx,256) %llu != %llu\n",
 460                        u64val, div64val, u64val >> 8);
 461                 return -EOVERFLOW;
 462         }
 463         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 464         if (len != 18) {
 465                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 466                 ret = -EINVAL;
 467         }
 468         len = snprintf(buf, sizeof(buf), "%llu", u64val);
 469         if (len != 20) {
 470                 CWARN("u64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 471                 ret = -EINVAL;
 472         }
 473         len = snprintf(buf, sizeof(buf), "%lld", u64val);
 474         if (len != 2) {
 475                 CWARN("s64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 476                 ret = -EINVAL;
 477         }
 478         if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) {
 479                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
 480                       (__u64)PAGE_SIZE);
 481                 ret = -EINVAL;
 482         }
 483
 484         return ret;
 485 }
 486 #else
 487 #define obd_init_checks() do {} while(0)
 488 #endif
 489
 490 static int __init obdclass_init(void)
 491 {
 492         int err;
 493
 494         LCONSOLE_INFO("Lustre: Build Version: "LUSTRE_VERSION_STRING"\n");
 495
 496         libcfs_kkuc_init();
 497
 498         err = obd_init_checks();
 499         if (err == -EOVERFLOW)
 500                 return err;
 501
 502 #ifdef CONFIG_PROC_FS
 503         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 504                                          LPROCFS_STATS_FLAG_NONE |
 505                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 506         if (obd_memory == NULL) {
 507                 CERROR("kmalloc of 'obd_memory' failed\n");
 508                 return -ENOMEM;
 509         }
 510
 511         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 512                              LPROCFS_CNTR_AVGMINMAX,
 513                              "memused", "bytes");
 514 #endif
 515         err = obd_zombie_impexp_init();
 516         if (err)
 517                 goto cleanup_obd_memory;
 518
 519         err = class_handle_init();
 520         if (err)
 521                 goto cleanup_zombie_impexp;
 522
 523         err = misc_register(&obd_psdev);
 524         if (err) {
 525                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 526                 goto cleanup_class_handle;
 527         }
 528
 529         /* Default the dirty page cache cap to 1/2 of system memory.
 530          * For clients with less memory, a larger fraction is needed
 531          * for other purposes (mostly for BGL). */
 532         if (totalram_pages <= 512 << (20 - PAGE_SHIFT))
 533                 obd_max_dirty_pages = totalram_pages / 4;
 534         else
 535                 obd_max_dirty_pages = totalram_pages / 2;
 536
 537         err = obd_init_caches();
 538         if (err)
 539                 goto cleanup_deregister;
 540
 541         err = class_procfs_init();
 542         if (err)
 543                 goto cleanup_caches;
 544
 545         err = lu_global_init();
 546         if (err)
 547                 goto cleanup_class_procfs;
 548
 549         err = cl_global_init();
 550         if (err != 0)
 551                 goto cleanup_lu_global;
 552
 553 #ifdef HAVE_SERVER_SUPPORT
 554         err = dt_global_init();
 555         if (err != 0)
 556                 goto cleanup_cl_global;
 557
 558         err = lu_ucred_global_init();
 559         if (err != 0)
 560                 goto cleanup_dt_global;
 561 #endif /* HAVE_SERVER_SUPPORT */
 562
 563         err = llog_info_init();
 564         if (err)
 565 #ifdef HAVE_SERVER_SUPPORT
 566                 goto cleanup_lu_ucred_global;
 567 #else /* !HAVE_SERVER_SUPPORT */
 568                 goto cleanup_cl_global;
 569 #endif /* HAVE_SERVER_SUPPORT */
 570
 571         err = lustre_register_fs();
 572
 573         /* simulate a late OOM situation now to require all
 574          * alloc'ed/initialized resources to be freed */
 575         if (OBD_FAIL_CHECK(OBD_FAIL_OBDCLASS_MODULE_LOAD)) {
 576                 /* fake error but filesystem has been registered */
 577                 lustre_unregister_fs();
 578                 /* force error to ensure module will be unloaded/cleaned */
 579                 err = -ENOMEM;
 580         }
 581
 582         if (err)
 583                 goto cleanup_llog_info;
 584
 585         return 0;
 586
 587 cleanup_llog_info:
 588         llog_info_fini();
 589
 590 #ifdef HAVE_SERVER_SUPPORT
 591 cleanup_lu_ucred_global:
 592         lu_ucred_global_fini();
 593
 594 cleanup_dt_global:
 595         dt_global_fini();
 596 #endif /* HAVE_SERVER_SUPPORT */
 597
 598 cleanup_cl_global:
 599         cl_global_fini();
 600
 601 cleanup_lu_global:
 602         lu_global_fini();
 603
 604 cleanup_class_procfs:
 605         obd_sysctl_clean();
 606         class_procfs_clean();
 607
 608 cleanup_caches:
 609         obd_cleanup_caches();
 610
 611 cleanup_deregister:
 612         misc_deregister(&obd_psdev);
 613
 614 cleanup_class_handle:
 615         class_handle_cleanup();
 616
 617 cleanup_zombie_impexp:
 618         obd_zombie_impexp_stop();
 619
 620 cleanup_obd_memory:
 621 #ifdef CONFIG_PROC_FS
 622         lprocfs_free_stats(&obd_memory);
 623 #endif
 624
 625         return err;
 626 }
 627
 628 void obd_update_maxusage(void)
 629 {
 630         __u64 max;
 631
 632         max = obd_memory_sum();
 633
 634         spin_lock(&obd_updatemax_lock);
 635         if (max > obd_max_alloc)
 636                 obd_max_alloc = max;
 637         spin_unlock(&obd_updatemax_lock);
 638 }
 639 EXPORT_SYMBOL(obd_update_maxusage);
 640
 641 #ifdef CONFIG_PROC_FS
 642 __u64 obd_memory_max(void)
 643 {
 644         __u64 ret;
 645
 646         obd_update_maxusage();
 647         spin_lock(&obd_updatemax_lock);
 648         ret = obd_max_alloc;
 649         spin_unlock(&obd_updatemax_lock);
 650
 651         return ret;
 652 }
 653 #endif /* CONFIG_PROC_FS */
 654
 655 static void __exit obdclass_exit(void)
 656 {
 657 #ifdef CONFIG_PROC_FS
 658         __u64 memory_leaked;
 659         __u64 memory_max;
 660 #endif /* CONFIG_PROC_FS */
 661         ENTRY;
 662
 663         lustre_unregister_fs();
 664
 665         misc_deregister(&obd_psdev);
 666         llog_info_fini();
 667 #ifdef HAVE_SERVER_SUPPORT
 668         lu_ucred_global_fini();
 669         dt_global_fini();
 670 #endif /* HAVE_SERVER_SUPPORT */
 671         cl_global_fini();
 672         lu_global_fini();
 673
 674         obd_cleanup_caches();
 675         obd_sysctl_clean();
 676
 677         class_procfs_clean();
 678
 679         class_handle_cleanup();
 680         class_del_uuid(NULL); /* Delete all UUIDs. */
 681         obd_zombie_impexp_stop();
 682
 683 #ifdef CONFIG_PROC_FS
 684         memory_leaked = obd_memory_sum();
 685         memory_max = obd_memory_max();
 686
 687         lprocfs_free_stats(&obd_memory);
 688         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 689                "obd_memory max: %llu, leaked: %llu\n",
 690                memory_max, memory_leaked);
 691 #endif /* CONFIG_PROC_FS */
 692
 693         EXIT;
 694 }
 695
 696 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 697 MODULE_DESCRIPTION("Lustre Class Driver");
 698 MODULE_VERSION(LUSTRE_VERSION_STRING);
 699 MODULE_LICENSE("GPL");
 700
 701 module_init(obdclass_init);
 702 module_exit(obdclass_exit);