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 <lprocfs_status.h>
  47 #include <lustre_ver.h>
  48 #include <cl_object.h>
  49 #ifdef HAVE_SERVER_SUPPORT
  50 # include <dt_object.h>
  51 # include <md_object.h>
  52 #endif /* HAVE_SERVER_SUPPORT */
  53 #include <lustre_ioctl.h>
  54 #include "llog_internal.h"
  55
  56 #ifdef CONFIG_PROC_FS
  57 static __u64 obd_max_alloc;
  58 #else
  59 __u64 obd_max_alloc;
  60 #endif
  61
  62 static DEFINE_SPINLOCK(obd_updatemax_lock);
  63
  64 /* The following are visible and mutable through /proc/sys/lustre/. */
  65 unsigned int obd_debug_peer_on_timeout;
  66 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  67 unsigned int obd_dump_on_timeout;
  68 EXPORT_SYMBOL(obd_dump_on_timeout);
  69 unsigned int obd_dump_on_eviction;
  70 EXPORT_SYMBOL(obd_dump_on_eviction);
  71 unsigned long obd_max_dirty_pages;
  72 EXPORT_SYMBOL(obd_max_dirty_pages);
  73 atomic_long_t obd_dirty_pages;
  74 EXPORT_SYMBOL(obd_dirty_pages);
  75 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  76 EXPORT_SYMBOL(obd_timeout);
  77 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  78 EXPORT_SYMBOL(ldlm_timeout);
  79 unsigned int obd_timeout_set;
  80 EXPORT_SYMBOL(obd_timeout_set);
  81 unsigned int ldlm_timeout_set;
  82 EXPORT_SYMBOL(ldlm_timeout_set);
  83 /* bulk transfer timeout, give up after 100s by default */
  84 unsigned int bulk_timeout = 100; /* seconds */
  85 EXPORT_SYMBOL(bulk_timeout);
  86 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  87 unsigned int at_min = 0;
  88 EXPORT_SYMBOL(at_min);
  89 unsigned int at_max = 600;
  90 EXPORT_SYMBOL(at_max);
  91 unsigned int at_history = 600;
  92 EXPORT_SYMBOL(at_history);
  93 int at_early_margin = 5;
  94 EXPORT_SYMBOL(at_early_margin);
  95 int at_extra = 30;
  96 EXPORT_SYMBOL(at_extra);
  97
  98 atomic_long_t obd_dirty_transit_pages;
  99 EXPORT_SYMBOL(obd_dirty_transit_pages);
 100
 101 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 102
 103 #ifdef CONFIG_PROC_FS
 104 struct lprocfs_stats *obd_memory = NULL;
 105 EXPORT_SYMBOL(obd_memory);
 106 #endif
 107
 108 char obd_jobid_node[LUSTRE_JOBID_SIZE + 1];
 109
 110 /* Get jobid of current process by reading the environment variable
 111  * stored in between the "env_start" & "env_end" of task struct.
 112  *
 113  * TODO:
 114  * It's better to cache the jobid for later use if there is any
 115  * efficient way, the cl_env code probably could be reused for this
 116  * purpose.
 117  *
 118  * If some job scheduler doesn't store jobid in the "env_start/end",
 119  * then an upcall could be issued here to get the jobid by utilizing
 120  * the userspace tools/api. Then, the jobid must be cached.
 121  */
 122 int lustre_get_jobid(char *jobid)
 123 {
 124         int jobid_len = LUSTRE_JOBID_SIZE;
 125         char tmp_jobid[LUSTRE_JOBID_SIZE] = { 0 };
 126         int rc = 0;
 127         ENTRY;
 128
 129         /* Jobstats isn't enabled */
 130         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 131                 GOTO(out, rc = 0);
 132
 133         /* Whole node dedicated to single job */
 134         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) {
 135                 memcpy(tmp_jobid, obd_jobid_node, LUSTRE_JOBID_SIZE);
 136                 GOTO(out, rc = 0);
 137         }
 138
 139         /* Use process name + fsuid as jobid */
 140         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 141                 snprintf(tmp_jobid, LUSTRE_JOBID_SIZE, "%s.%u",
 142                          current_comm(),
 143                          from_kuid(&init_user_ns, current_fsuid()));
 144                 GOTO(out, rc = 0);
 145         }
 146
 147         rc = cfs_get_environ(obd_jobid_var, tmp_jobid, &jobid_len);
 148         if (rc) {
 149                 if (rc == -EOVERFLOW) {
 150                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 151                          * variable length strings instead of just numbers), it
 152                          * might make sense to keep the unique parts for JobID,
 153                          * instead of just returning an error.  That means a
 154                          * larger temp buffer for cfs_get_environ(), then
 155                          * truncating the string at some separator to fit into
 156                          * the specified jobid_len.  Fix later if needed. */
 157                         static bool printed;
 158                         if (unlikely(!printed)) {
 159                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 160                                                    "for JobID buffer (%d)\n",
 161                                                    obd_jobid_var, jobid_len);
 162                                 printed = true;
 163                         }
 164                 } else {
 165                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 166                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 167                                "Get jobid for (%s) failed: rc = %d\n",
 168                                obd_jobid_var, rc);
 169                 }
 170         }
 171
 172 out:
 173         if (rc != 0)
 174                 RETURN(rc);
 175
 176         /* Only replace the job ID if it changed. */
 177         if (strcmp(jobid, tmp_jobid) != 0)
 178                 memcpy(jobid, tmp_jobid, jobid_len);
 179
 180         RETURN(0);
 181 }
 182 EXPORT_SYMBOL(lustre_get_jobid);
 183
 184 static int class_resolve_dev_name(__u32 len, const char *name)
 185 {
 186         int rc;
 187         int dev;
 188
 189         ENTRY;
 190         if (!len || !name) {
 191                 CERROR("No name passed,!\n");
 192                 GOTO(out, rc = -EINVAL);
 193         }
 194         if (name[len - 1] != 0) {
 195                 CERROR("Name not nul terminated!\n");
 196                 GOTO(out, rc = -EINVAL);
 197         }
 198
 199         CDEBUG(D_IOCTL, "device name %s\n", name);
 200         dev = class_name2dev(name);
 201         if (dev == -1) {
 202                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 203                 GOTO(out, rc = -EINVAL);
 204         }
 205
 206         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 207         rc = dev;
 208
 209 out:
 210         RETURN(rc);
 211 }
 212
 213 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 214 {
 215         char *buf = NULL;
 216         struct obd_ioctl_data *data;
 217         struct libcfs_debug_ioctl_data *debug_data;
 218         struct obd_device *obd = NULL;
 219         int err = 0, len = 0;
 220         ENTRY;
 221
 222         /* only for debugging */
 223         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 224                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 225                 libcfs_subsystem_debug = debug_data->subs;
 226                 libcfs_debug = debug_data->debug;
 227                 return 0;
 228         }
 229
 230         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 231         if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
 232                 CERROR("OBD ioctl: data error\n");
 233                 RETURN(-EINVAL);
 234         }
 235         data = (struct obd_ioctl_data *)buf;
 236
 237         switch (cmd) {
 238         case OBD_IOC_PROCESS_CFG: {
 239                 struct lustre_cfg *lcfg;
 240
 241                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 242                         CERROR("No config buffer passed!\n");
 243                         GOTO(out, err = -EINVAL);
 244                 }
 245                 OBD_ALLOC(lcfg, data->ioc_plen1);
 246                 if (lcfg == NULL)
 247                         GOTO(out, err = -ENOMEM);
 248                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 249                                          data->ioc_plen1);
 250                 if (!err)
 251                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 252                 if (!err)
 253                         err = class_process_config(lcfg);
 254
 255                 OBD_FREE(lcfg, data->ioc_plen1);
 256                 GOTO(out, err);
 257         }
 258
 259         case OBD_GET_VERSION:
 260                 if (!data->ioc_inlbuf1) {
 261                         CERROR("No buffer passed in ioctl\n");
 262                         GOTO(out, err = -EINVAL);
 263                 }
 264
 265                 if (strlen(LUSTRE_VERSION_STRING) + 1 > data->ioc_inllen1) {
 266                         CERROR("ioctl buffer too small to hold version\n");
 267                         GOTO(out, err = -EINVAL);
 268                 }
 269
 270                 memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING,
 271                        strlen(LUSTRE_VERSION_STRING) + 1);
 272
 273                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 274                 if (err)
 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                 err = obd_ioctl_popdata((void __user *)arg, data,
 291                                         sizeof(*data));
 292                 if (err)
 293                         err = -EFAULT;
 294                 GOTO(out, err);
 295         }
 296
 297         case OBD_IOC_UUID2DEV: {
 298                 /* Resolve a device uuid.  This does not change the
 299                  * currently selected device.
 300                  */
 301                 int dev;
 302                 struct obd_uuid uuid;
 303
 304                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 305                         CERROR("No UUID passed!\n");
 306                         GOTO(out, err = -EINVAL);
 307                 }
 308                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 309                         CERROR("UUID not NUL terminated!\n");
 310                         GOTO(out, err = -EINVAL);
 311                 }
 312
 313                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 314                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 315                 dev = class_uuid2dev(&uuid);
 316                 data->ioc_dev = dev;
 317                 if (dev == -1) {
 318                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 319                                data->ioc_inlbuf1);
 320                         GOTO(out, err = -EINVAL);
 321                 }
 322
 323                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 324                        dev);
 325                 err = obd_ioctl_popdata((void __user *)arg, data,
 326                                         sizeof(*data));
 327                 if (err)
 328                         err = -EFAULT;
 329                 GOTO(out, err);
 330         }
 331
 332         case OBD_IOC_GETDEVICE: {
 333                 int     index = data->ioc_count;
 334                 char    *status, *str;
 335
 336                 if (!data->ioc_inlbuf1) {
 337                         CERROR("No buffer passed in ioctl\n");
 338                         GOTO(out, err = -EINVAL);
 339                 }
 340                 if (data->ioc_inllen1 < 128) {
 341                         CERROR("ioctl buffer too small to hold version\n");
 342                         GOTO(out, err = -EINVAL);
 343                 }
 344
 345                 obd = class_num2obd(index);
 346                 if (!obd)
 347                         GOTO(out, err = -ENOENT);
 348
 349                 if (obd->obd_stopping)
 350                         status = "ST";
 351                 else if (obd->obd_set_up)
 352                         status = "UP";
 353                 else if (obd->obd_attached)
 354                         status = "AT";
 355                 else
 356                         status = "--";
 357                 str = (char *)data->ioc_bulk;
 358                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 359                          (int)index, status, obd->obd_type->typ_name,
 360                          obd->obd_name, obd->obd_uuid.uuid,
 361                          atomic_read(&obd->obd_refcount));
 362                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 363
 364                 GOTO(out, err = 0);
 365         }
 366
 367         }
 368
 369         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 370                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 371                         GOTO(out, err = -EINVAL);
 372                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 373                         GOTO(out, err = -EINVAL);
 374                 obd = class_name2obd(data->ioc_inlbuf4);
 375         } else if (data->ioc_dev < class_devno_max()) {
 376                 obd = class_num2obd(data->ioc_dev);
 377         } else {
 378                 CERROR("OBD ioctl: No device\n");
 379                 GOTO(out, err = -EINVAL);
 380         }
 381
 382         if (obd == NULL) {
 383                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 384                 GOTO(out, err = -EINVAL);
 385         }
 386         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 387
 388         if (!obd->obd_set_up || obd->obd_stopping) {
 389                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 390                 GOTO(out, err = -EINVAL);
 391         }
 392
 393         switch(cmd) {
 394         case OBD_IOC_NO_TRANSNO: {
 395                 if (!obd->obd_attached) {
 396                         CERROR("Device %d not attached\n", obd->obd_minor);
 397                         GOTO(out, err = -ENODEV);
 398                 }
 399                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 400                        obd->obd_name);
 401                 obd->obd_no_transno = 1;
 402                 GOTO(out, err = 0);
 403         }
 404
 405         default: {
 406                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 407                 if (err)
 408                         GOTO(out, err);
 409
 410                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 411                 if (err)
 412                         err = -EFAULT;
 413                 GOTO(out, err);
 414         }
 415         }
 416
 417  out:
 418         if (buf)
 419                 obd_ioctl_freedata(buf, len);
 420         RETURN(err);
 421 } /* class_handle_ioctl */
 422
 423 #define OBD_INIT_CHECK
 424 #ifdef OBD_INIT_CHECK
 425 static int obd_init_checks(void)
 426 {
 427         __u64 u64val, div64val;
 428         char buf[64];
 429         int len, ret = 0;
 430
 431         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
 432
 433         u64val = OBD_OBJECT_EOF;
 434         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 435         if (u64val != OBD_OBJECT_EOF) {
 436                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 437                        u64val, (int)sizeof(u64val));
 438                 ret = -EINVAL;
 439         }
 440         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 441         if (len != 18) {
 442                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 443                 ret = -EINVAL;
 444         }
 445
 446         div64val = OBD_OBJECT_EOF;
 447         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 448         if (u64val != OBD_OBJECT_EOF) {
 449                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 450                        u64val, (int)sizeof(u64val));
 451                 ret = -EOVERFLOW;
 452         }
 453         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 454                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 455                        u64val, (int)sizeof(u64val));
 456                 return -EOVERFLOW;
 457         }
 458         if (do_div(div64val, 256) != (u64val & 255)) {
 459                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255);
 460                 return -EOVERFLOW;
 461         }
 462         if (u64val >> 8 != div64val) {
 463                 CERROR("do_div(%#llx,256) %llu != %llu\n",
 464                        u64val, div64val, u64val >> 8);
 465                 return -EOVERFLOW;
 466         }
 467         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 468         if (len != 18) {
 469                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 470                 ret = -EINVAL;
 471         }
 472         len = snprintf(buf, sizeof(buf), "%llu", u64val);
 473         if (len != 20) {
 474                 CWARN("u64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 475                 ret = -EINVAL;
 476         }
 477         len = snprintf(buf, sizeof(buf), "%lld", u64val);
 478         if (len != 2) {
 479                 CWARN("s64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 480                 ret = -EINVAL;
 481         }
 482         if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) {
 483                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
 484                       (__u64)PAGE_SIZE);
 485                 ret = -EINVAL;
 486         }
 487
 488         return ret;
 489 }
 490 #else
 491 #define obd_init_checks() do {} while(0)
 492 #endif
 493
 494 static int __init obdclass_init(void)
 495 {
 496         int err;
 497
 498         LCONSOLE_INFO("Lustre: Build Version: "LUSTRE_VERSION_STRING"\n");
 499
 500         err = obd_init_checks();
 501         if (err == -EOVERFLOW)
 502                 return err;
 503
 504 #ifdef CONFIG_PROC_FS
 505         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 506                                          LPROCFS_STATS_FLAG_NONE |
 507                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 508         if (obd_memory == NULL) {
 509                 CERROR("kmalloc of 'obd_memory' failed\n");
 510                 return -ENOMEM;
 511         }
 512
 513         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 514                              LPROCFS_CNTR_AVGMINMAX,
 515                              "memused", "bytes");
 516 #endif
 517         err = obd_zombie_impexp_init();
 518         if (err)
 519                 goto cleanup_obd_memory;
 520
 521         err = class_handle_init();
 522         if (err)
 523                 goto cleanup_zombie_impexp;
 524
 525         err = misc_register(&obd_psdev);
 526         if (err) {
 527                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 528                 goto cleanup_class_handle;
 529         }
 530
 531         /* Default the dirty page cache cap to 1/2 of system memory.
 532          * For clients with less memory, a larger fraction is needed
 533          * for other purposes (mostly for BGL). */
 534         if (totalram_pages <= 512 << (20 - PAGE_SHIFT))
 535                 obd_max_dirty_pages = totalram_pages / 4;
 536         else
 537                 obd_max_dirty_pages = totalram_pages / 2;
 538
 539         err = obd_init_caches();
 540         if (err)
 541                 goto cleanup_deregister;
 542
 543         err = class_procfs_init();
 544         if (err)
 545                 goto cleanup_caches;
 546
 547         err = lu_global_init();
 548         if (err)
 549                 goto cleanup_class_procfs;
 550
 551         err = cl_global_init();
 552         if (err != 0)
 553                 goto cleanup_lu_global;
 554
 555 #ifdef HAVE_SERVER_SUPPORT
 556         err = dt_global_init();
 557         if (err != 0)
 558                 goto cleanup_cl_global;
 559
 560         err = lu_ucred_global_init();
 561         if (err != 0)
 562                 goto cleanup_dt_global;
 563 #endif /* HAVE_SERVER_SUPPORT */
 564
 565         err = llog_info_init();
 566         if (err)
 567 #ifdef HAVE_SERVER_SUPPORT
 568                 goto cleanup_lu_ucred_global;
 569 #else /* !HAVE_SERVER_SUPPORT */
 570                 goto cleanup_cl_global;
 571 #endif /* HAVE_SERVER_SUPPORT */
 572
 573         err = lustre_register_fs();
 574
 575         /* simulate a late OOM situation now to require all
 576          * alloc'ed/initialized resources to be freed */
 577         if (OBD_FAIL_CHECK(OBD_FAIL_OBDCLASS_MODULE_LOAD)) {
 578                 /* fake error but filesystem has been registered */
 579                 lustre_unregister_fs();
 580                 /* force error to ensure module will be unloaded/cleaned */
 581                 err = -ENOMEM;
 582         }
 583
 584         if (err)
 585                 goto cleanup_llog_info;
 586
 587         return 0;
 588
 589 cleanup_llog_info:
 590         llog_info_fini();
 591
 592 #ifdef HAVE_SERVER_SUPPORT
 593 cleanup_lu_ucred_global:
 594         lu_ucred_global_fini();
 595
 596 cleanup_dt_global:
 597         dt_global_fini();
 598 #endif /* HAVE_SERVER_SUPPORT */
 599
 600 cleanup_cl_global:
 601         cl_global_fini();
 602
 603 cleanup_lu_global:
 604         lu_global_fini();
 605
 606 cleanup_class_procfs:
 607         obd_sysctl_clean();
 608         class_procfs_clean();
 609
 610 cleanup_caches:
 611         obd_cleanup_caches();
 612
 613 cleanup_deregister:
 614         misc_deregister(&obd_psdev);
 615
 616 cleanup_class_handle:
 617         class_handle_cleanup();
 618
 619 cleanup_zombie_impexp:
 620         obd_zombie_impexp_stop();
 621
 622 cleanup_obd_memory:
 623 #ifdef CONFIG_PROC_FS
 624         lprocfs_free_stats(&obd_memory);
 625 #endif
 626
 627         return err;
 628 }
 629
 630 void obd_update_maxusage(void)
 631 {
 632         __u64 max;
 633
 634         max = obd_memory_sum();
 635
 636         spin_lock(&obd_updatemax_lock);
 637         if (max > obd_max_alloc)
 638                 obd_max_alloc = max;
 639         spin_unlock(&obd_updatemax_lock);
 640 }
 641 EXPORT_SYMBOL(obd_update_maxusage);
 642
 643 #ifdef CONFIG_PROC_FS
 644 __u64 obd_memory_max(void)
 645 {
 646         __u64 ret;
 647
 648         obd_update_maxusage();
 649         spin_lock(&obd_updatemax_lock);
 650         ret = obd_max_alloc;
 651         spin_unlock(&obd_updatemax_lock);
 652
 653         return ret;
 654 }
 655 #endif /* CONFIG_PROC_FS */
 656
 657 static void __exit obdclass_exit(void)
 658 {
 659 #ifdef CONFIG_PROC_FS
 660         __u64 memory_leaked;
 661         __u64 memory_max;
 662 #endif /* CONFIG_PROC_FS */
 663         ENTRY;
 664
 665         lustre_unregister_fs();
 666
 667         misc_deregister(&obd_psdev);
 668         llog_info_fini();
 669 #ifdef HAVE_SERVER_SUPPORT
 670         lu_ucred_global_fini();
 671         dt_global_fini();
 672 #endif /* HAVE_SERVER_SUPPORT */
 673         cl_global_fini();
 674         lu_global_fini();
 675
 676         obd_cleanup_caches();
 677         obd_sysctl_clean();
 678
 679         class_procfs_clean();
 680
 681         class_handle_cleanup();
 682         class_del_uuid(NULL); /* Delete all UUIDs. */
 683         obd_zombie_impexp_stop();
 684
 685 #ifdef CONFIG_PROC_FS
 686         memory_leaked = obd_memory_sum();
 687         memory_max = obd_memory_max();
 688
 689         lprocfs_free_stats(&obd_memory);
 690         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 691                "obd_memory max: %llu, leaked: %llu\n",
 692                memory_max, memory_leaked);
 693 #endif /* CONFIG_PROC_FS */
 694
 695         EXIT;
 696 }
 697
 698 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 699 MODULE_DESCRIPTION("Lustre Class Driver");
 700 MODULE_VERSION(LUSTRE_VERSION_STRING);
 701 MODULE_LICENSE("GPL");
 702
 703 module_init(obdclass_init);
 704 module_exit(obdclass_exit);