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/miscdevice.h>
  36 #include <linux/user_namespace.h>
  37 #ifdef HAVE_UIDGID_HEADER
  38 # include <linux/uidgid.h>
  39 #endif
  40 #include <linux/atomic.h>
  41 #include <linux/list.h>
  42
  43 #include <obd_support.h>
  44 #include <obd_class.h>
  45 #include <lnet/lnetctl.h>
  46 #include <lustre_debug.h>
  47 #include <lustre_kernelcomm.h>
  48 #include <lprocfs_status.h>
  49 #include <lustre_ver.h>
  50 #include <cl_object.h>
  51 #ifdef HAVE_SERVER_SUPPORT
  52 # include <dt_object.h>
  53 # include <md_object.h>
  54 #endif /* HAVE_SERVER_SUPPORT */
  55 #include <uapi/linux/lustre_ioctl.h>
  56 #include "llog_internal.h"
  57
  58 #ifdef CONFIG_PROC_FS
  59 static __u64 obd_max_alloc;
  60 #else
  61 __u64 obd_max_alloc;
  62 #endif
  63
  64 static DEFINE_SPINLOCK(obd_updatemax_lock);
  65
  66 /* The following are visible and mutable through /proc/sys/lustre/. */
  67 unsigned int obd_debug_peer_on_timeout;
  68 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  69 unsigned int obd_dump_on_timeout;
  70 EXPORT_SYMBOL(obd_dump_on_timeout);
  71 unsigned int obd_dump_on_eviction;
  72 EXPORT_SYMBOL(obd_dump_on_eviction);
  73 unsigned long obd_max_dirty_pages;
  74 EXPORT_SYMBOL(obd_max_dirty_pages);
  75 atomic_long_t obd_dirty_pages;
  76 EXPORT_SYMBOL(obd_dirty_pages);
  77 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  78 EXPORT_SYMBOL(obd_timeout);
  79 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  80 EXPORT_SYMBOL(ldlm_timeout);
  81 unsigned int obd_timeout_set;
  82 EXPORT_SYMBOL(obd_timeout_set);
  83 unsigned int ldlm_timeout_set;
  84 EXPORT_SYMBOL(ldlm_timeout_set);
  85 /* bulk transfer timeout, give up after 100s by default */
  86 unsigned int bulk_timeout = 100; /* seconds */
  87 EXPORT_SYMBOL(bulk_timeout);
  88 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  89 unsigned int at_min = 0;
  90 EXPORT_SYMBOL(at_min);
  91 unsigned int at_max = 600;
  92 EXPORT_SYMBOL(at_max);
  93 unsigned int at_history = 600;
  94 EXPORT_SYMBOL(at_history);
  95 int at_early_margin = 5;
  96 EXPORT_SYMBOL(at_early_margin);
  97 int at_extra = 30;
  98 EXPORT_SYMBOL(at_extra);
  99
 100 atomic_long_t obd_dirty_transit_pages;
 101 EXPORT_SYMBOL(obd_dirty_transit_pages);
 102
 103 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 104
 105 #ifdef CONFIG_PROC_FS
 106 struct lprocfs_stats *obd_memory = NULL;
 107 EXPORT_SYMBOL(obd_memory);
 108 #endif
 109
 110 char obd_jobid_node[LUSTRE_JOBID_SIZE + 1];
 111
 112 /* Get jobid of current process by reading the environment variable
 113  * stored in between the "env_start" & "env_end" of task struct.
 114  *
 115  * TODO:
 116  * It's better to cache the jobid for later use if there is any
 117  * efficient way, the cl_env code probably could be reused for this
 118  * purpose.
 119  *
 120  * If some job scheduler doesn't store jobid in the "env_start/end",
 121  * then an upcall could be issued here to get the jobid by utilizing
 122  * the userspace tools/api. Then, the jobid must be cached.
 123  */
 124 int lustre_get_jobid(char *jobid)
 125 {
 126         int jobid_len = LUSTRE_JOBID_SIZE;
 127         char tmp_jobid[LUSTRE_JOBID_SIZE] = { 0 };
 128         int rc = 0;
 129         ENTRY;
 130
 131         /* Jobstats isn't enabled */
 132         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 133                 GOTO(out, rc = 0);
 134
 135         /* Whole node dedicated to single job */
 136         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) {
 137                 memcpy(tmp_jobid, obd_jobid_node, LUSTRE_JOBID_SIZE);
 138                 GOTO(out, rc = 0);
 139         }
 140
 141         /* Use process name + fsuid as jobid */
 142         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 143                 snprintf(tmp_jobid, LUSTRE_JOBID_SIZE, "%s.%u",
 144                          current_comm(),
 145                          from_kuid(&init_user_ns, current_fsuid()));
 146                 GOTO(out, rc = 0);
 147         }
 148
 149         rc = cfs_get_environ(obd_jobid_var, tmp_jobid, &jobid_len);
 150         if (rc) {
 151                 if (rc == -EOVERFLOW) {
 152                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 153                          * variable length strings instead of just numbers), it
 154                          * might make sense to keep the unique parts for JobID,
 155                          * instead of just returning an error.  That means a
 156                          * larger temp buffer for cfs_get_environ(), then
 157                          * truncating the string at some separator to fit into
 158                          * the specified jobid_len.  Fix later if needed. */
 159                         static bool printed;
 160                         if (unlikely(!printed)) {
 161                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 162                                                    "for JobID buffer (%d)\n",
 163                                                    obd_jobid_var, jobid_len);
 164                                 printed = true;
 165                         }
 166                 } else {
 167                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 168                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 169                                "Get jobid for (%s) failed: rc = %d\n",
 170                                obd_jobid_var, rc);
 171                 }
 172         }
 173
 174 out:
 175         if (rc != 0)
 176                 RETURN(rc);
 177
 178         /* Only replace the job ID if it changed. */
 179         if (strcmp(jobid, tmp_jobid) != 0)
 180                 memcpy(jobid, tmp_jobid, jobid_len);
 181
 182         RETURN(0);
 183 }
 184 EXPORT_SYMBOL(lustre_get_jobid);
 185
 186 static int class_resolve_dev_name(__u32 len, const char *name)
 187 {
 188         int rc;
 189         int dev;
 190
 191         ENTRY;
 192         if (!len || !name) {
 193                 CERROR("No name passed,!\n");
 194                 GOTO(out, rc = -EINVAL);
 195         }
 196         if (name[len - 1] != 0) {
 197                 CERROR("Name not nul terminated!\n");
 198                 GOTO(out, rc = -EINVAL);
 199         }
 200
 201         CDEBUG(D_IOCTL, "device name %s\n", name);
 202         dev = class_name2dev(name);
 203         if (dev == -1) {
 204                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 205                 GOTO(out, rc = -EINVAL);
 206         }
 207
 208         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 209         rc = dev;
 210
 211 out:
 212         RETURN(rc);
 213 }
 214
 215 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 216 {
 217         char *buf = NULL;
 218         struct obd_ioctl_data *data;
 219         struct libcfs_debug_ioctl_data *debug_data;
 220         struct obd_device *obd = NULL;
 221         int err = 0, len = 0;
 222         ENTRY;
 223
 224         /* only for debugging */
 225         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 226                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 227                 libcfs_subsystem_debug = debug_data->subs;
 228                 libcfs_debug = debug_data->debug;
 229                 return 0;
 230         }
 231
 232         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 233         if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
 234                 CERROR("OBD ioctl: data error\n");
 235                 RETURN(-EINVAL);
 236         }
 237         data = (struct obd_ioctl_data *)buf;
 238
 239         switch (cmd) {
 240         case OBD_IOC_PROCESS_CFG: {
 241                 struct lustre_cfg *lcfg;
 242
 243                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 244                         CERROR("No config buffer passed!\n");
 245                         GOTO(out, err = -EINVAL);
 246                 }
 247                 OBD_ALLOC(lcfg, data->ioc_plen1);
 248                 if (lcfg == NULL)
 249                         GOTO(out, err = -ENOMEM);
 250                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 251                                          data->ioc_plen1);
 252                 if (!err)
 253                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 254                 if (!err)
 255                         err = class_process_config(lcfg);
 256
 257                 OBD_FREE(lcfg, data->ioc_plen1);
 258                 GOTO(out, err);
 259         }
 260
 261 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
 262         case OBD_GET_VERSION: {
 263                 static bool warned;
 264
 265                 if (!data->ioc_inlbuf1) {
 266                         CERROR("No buffer passed in ioctl\n");
 267                         GOTO(out, err = -EINVAL);
 268                 }
 269
 270                 if (strlen(LUSTRE_VERSION_STRING) + 1 > data->ioc_inllen1) {
 271                         CERROR("ioctl buffer too small to hold version\n");
 272                         GOTO(out, err = -EINVAL);
 273                 }
 274
 275                 if (!warned) {
 276                         warned = true;
 277                         CWARN("%s: ioctl(OBD_GET_VERSION) is deprecated, "
 278                               "use llapi_get_version_string() and/or relink\n",
 279                               current->comm);
 280                 }
 281                 memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING,
 282                        strlen(LUSTRE_VERSION_STRING) + 1);
 283
 284                 if (copy_to_user((void __user *)arg, data, len))
 285                         err = -EFAULT;
 286                 GOTO(out, err);
 287         }
 288 #endif
 289         case OBD_IOC_NAME2DEV: {
 290                 /* Resolve a device name.  This does not change the
 291                  * currently selected device.
 292                  */
 293                 int dev;
 294
 295                 dev = class_resolve_dev_name(data->ioc_inllen1,
 296                                              data->ioc_inlbuf1);
 297                 data->ioc_dev = dev;
 298                 if (dev < 0)
 299                         GOTO(out, err = -EINVAL);
 300
 301                 if (copy_to_user((void __user *)arg, data, sizeof(*data)))
 302                         err = -EFAULT;
 303                 GOTO(out, err);
 304         }
 305
 306         case OBD_IOC_UUID2DEV: {
 307                 /* Resolve a device uuid.  This does not change the
 308                  * currently selected device.
 309                  */
 310                 int dev;
 311                 struct obd_uuid uuid;
 312
 313                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 314                         CERROR("No UUID passed!\n");
 315                         GOTO(out, err = -EINVAL);
 316                 }
 317                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 318                         CERROR("UUID not NUL terminated!\n");
 319                         GOTO(out, err = -EINVAL);
 320                 }
 321
 322                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 323                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 324                 dev = class_uuid2dev(&uuid);
 325                 data->ioc_dev = dev;
 326                 if (dev == -1) {
 327                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 328                                data->ioc_inlbuf1);
 329                         GOTO(out, err = -EINVAL);
 330                 }
 331
 332                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 333                        dev);
 334                 if (copy_to_user((void __user *)arg, data, sizeof(*data)))
 335                         err = -EFAULT;
 336                 GOTO(out, err);
 337         }
 338
 339         case OBD_IOC_GETDEVICE: {
 340                 int     index = data->ioc_count;
 341                 char    *status, *str;
 342
 343                 if (!data->ioc_inlbuf1) {
 344                         CERROR("No buffer passed in ioctl\n");
 345                         GOTO(out, err = -EINVAL);
 346                 }
 347                 if (data->ioc_inllen1 < 128) {
 348                         CERROR("ioctl buffer too small to hold version\n");
 349                         GOTO(out, err = -EINVAL);
 350                 }
 351
 352                 obd = class_num2obd(index);
 353                 if (!obd)
 354                         GOTO(out, err = -ENOENT);
 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
 370                 if (copy_to_user((void __user *)arg, data, len))
 371                         err = -EFAULT;
 372
 373                 GOTO(out, err);
 374         }
 375
 376         }
 377
 378         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 379                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 380                         GOTO(out, err = -EINVAL);
 381                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 382                         GOTO(out, err = -EINVAL);
 383                 obd = class_name2obd(data->ioc_inlbuf4);
 384         } else if (data->ioc_dev < class_devno_max()) {
 385                 obd = class_num2obd(data->ioc_dev);
 386         } else {
 387                 CERROR("OBD ioctl: No device\n");
 388                 GOTO(out, err = -EINVAL);
 389         }
 390
 391         if (obd == NULL) {
 392                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 393                 GOTO(out, err = -EINVAL);
 394         }
 395         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 396
 397         if (!obd->obd_set_up || obd->obd_stopping) {
 398                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 399                 GOTO(out, err = -EINVAL);
 400         }
 401
 402         switch(cmd) {
 403         case OBD_IOC_NO_TRANSNO: {
 404                 if (!obd->obd_attached) {
 405                         CERROR("Device %d not attached\n", obd->obd_minor);
 406                         GOTO(out, err = -ENODEV);
 407                 }
 408                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 409                        obd->obd_name);
 410                 obd->obd_no_transno = 1;
 411                 GOTO(out, err = 0);
 412         }
 413
 414         default: {
 415                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 416                 if (err)
 417                         GOTO(out, err);
 418
 419                 if (copy_to_user((void __user *)arg, data, len))
 420                         err = -EFAULT;
 421                 GOTO(out, err);
 422         }
 423         }
 424
 425 out:
 426         OBD_FREE_LARGE(buf, len);
 427         RETURN(err);
 428 } /* class_handle_ioctl */
 429
 430 #define OBD_INIT_CHECK
 431 #ifdef OBD_INIT_CHECK
 432 static int obd_init_checks(void)
 433 {
 434         __u64 u64val, div64val;
 435         char buf[64];
 436         int len, ret = 0;
 437
 438         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
 439
 440         u64val = 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 = -EINVAL;
 446         }
 447         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 448         if (len != 18) {
 449                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 450                 ret = -EINVAL;
 451         }
 452
 453         div64val = 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 = -EOVERFLOW;
 459         }
 460         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 461                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 462                        u64val, (int)sizeof(u64val));
 463                 return -EOVERFLOW;
 464         }
 465         if (do_div(div64val, 256) != (u64val & 255)) {
 466                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255);
 467                 return -EOVERFLOW;
 468         }
 469         if (u64val >> 8 != div64val) {
 470                 CERROR("do_div(%#llx,256) %llu != %llu\n",
 471                        u64val, div64val, u64val >> 8);
 472                 return -EOVERFLOW;
 473         }
 474         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 475         if (len != 18) {
 476                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 477                 ret = -EINVAL;
 478         }
 479         len = snprintf(buf, sizeof(buf), "%llu", u64val);
 480         if (len != 20) {
 481                 CWARN("u64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 482                 ret = -EINVAL;
 483         }
 484         len = snprintf(buf, sizeof(buf), "%lld", u64val);
 485         if (len != 2) {
 486                 CWARN("s64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 487                 ret = -EINVAL;
 488         }
 489         if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) {
 490                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
 491                       (__u64)PAGE_SIZE);
 492                 ret = -EINVAL;
 493         }
 494
 495         return ret;
 496 }
 497 #else
 498 #define obd_init_checks() do {} while(0)
 499 #endif
 500
 501 static int __init obdclass_init(void)
 502 {
 503         int err;
 504
 505         LCONSOLE_INFO("Lustre: Build Version: "LUSTRE_VERSION_STRING"\n");
 506
 507         libcfs_kkuc_init();
 508
 509         err = obd_init_checks();
 510         if (err == -EOVERFLOW)
 511                 return err;
 512
 513 #ifdef CONFIG_PROC_FS
 514         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 515                                          LPROCFS_STATS_FLAG_NONE |
 516                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 517         if (obd_memory == NULL) {
 518                 CERROR("kmalloc of 'obd_memory' failed\n");
 519                 return -ENOMEM;
 520         }
 521
 522         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 523                              LPROCFS_CNTR_AVGMINMAX,
 524                              "memused", "bytes");
 525 #endif
 526         err = obd_zombie_impexp_init();
 527         if (err)
 528                 goto cleanup_obd_memory;
 529
 530         err = class_handle_init();
 531         if (err)
 532                 goto cleanup_zombie_impexp;
 533
 534         err = misc_register(&obd_psdev);
 535         if (err) {
 536                 CERROR("cannot register OBD miscdevice: err = %d\n", err);
 537                 goto cleanup_class_handle;
 538         }
 539
 540         /* Default the dirty page cache cap to 1/2 of system memory.
 541          * For clients with less memory, a larger fraction is needed
 542          * for other purposes (mostly for BGL). */
 543         if (totalram_pages <= 512 << (20 - PAGE_SHIFT))
 544                 obd_max_dirty_pages = totalram_pages / 4;
 545         else
 546                 obd_max_dirty_pages = totalram_pages / 2;
 547
 548         err = obd_init_caches();
 549         if (err)
 550                 goto cleanup_deregister;
 551
 552         err = class_procfs_init();
 553         if (err)
 554                 goto cleanup_caches;
 555
 556         err = lu_global_init();
 557         if (err)
 558                 goto cleanup_class_procfs;
 559
 560         err = cl_global_init();
 561         if (err != 0)
 562                 goto cleanup_lu_global;
 563
 564 #ifdef HAVE_SERVER_SUPPORT
 565         err = dt_global_init();
 566         if (err != 0)
 567                 goto cleanup_cl_global;
 568
 569         err = lu_ucred_global_init();
 570         if (err != 0)
 571                 goto cleanup_dt_global;
 572 #endif /* HAVE_SERVER_SUPPORT */
 573
 574         err = llog_info_init();
 575         if (err)
 576 #ifdef HAVE_SERVER_SUPPORT
 577                 goto cleanup_lu_ucred_global;
 578 #else /* !HAVE_SERVER_SUPPORT */
 579                 goto cleanup_cl_global;
 580 #endif /* HAVE_SERVER_SUPPORT */
 581
 582         err = lustre_register_fs();
 583
 584         /* simulate a late OOM situation now to require all
 585          * alloc'ed/initialized resources to be freed */
 586         if (OBD_FAIL_CHECK(OBD_FAIL_OBDCLASS_MODULE_LOAD)) {
 587                 /* fake error but filesystem has been registered */
 588                 lustre_unregister_fs();
 589                 /* force error to ensure module will be unloaded/cleaned */
 590                 err = -ENOMEM;
 591         }
 592
 593         if (err)
 594                 goto cleanup_llog_info;
 595
 596         return 0;
 597
 598 cleanup_llog_info:
 599         llog_info_fini();
 600
 601 #ifdef HAVE_SERVER_SUPPORT
 602 cleanup_lu_ucred_global:
 603         lu_ucred_global_fini();
 604
 605 cleanup_dt_global:
 606         dt_global_fini();
 607 #endif /* HAVE_SERVER_SUPPORT */
 608
 609 cleanup_cl_global:
 610         cl_global_fini();
 611
 612 cleanup_lu_global:
 613         lu_global_fini();
 614
 615 cleanup_class_procfs:
 616         obd_sysctl_clean();
 617         class_procfs_clean();
 618
 619 cleanup_caches:
 620         obd_cleanup_caches();
 621
 622 cleanup_deregister:
 623         misc_deregister(&obd_psdev);
 624
 625 cleanup_class_handle:
 626         class_handle_cleanup();
 627
 628 cleanup_zombie_impexp:
 629         obd_zombie_impexp_stop();
 630
 631 cleanup_obd_memory:
 632 #ifdef CONFIG_PROC_FS
 633         lprocfs_free_stats(&obd_memory);
 634 #endif
 635
 636         return err;
 637 }
 638
 639 void obd_update_maxusage(void)
 640 {
 641         __u64 max;
 642
 643         max = obd_memory_sum();
 644
 645         spin_lock(&obd_updatemax_lock);
 646         if (max > obd_max_alloc)
 647                 obd_max_alloc = max;
 648         spin_unlock(&obd_updatemax_lock);
 649 }
 650 EXPORT_SYMBOL(obd_update_maxusage);
 651
 652 #ifdef CONFIG_PROC_FS
 653 __u64 obd_memory_max(void)
 654 {
 655         __u64 ret;
 656
 657         obd_update_maxusage();
 658         spin_lock(&obd_updatemax_lock);
 659         ret = obd_max_alloc;
 660         spin_unlock(&obd_updatemax_lock);
 661
 662         return ret;
 663 }
 664 #endif /* CONFIG_PROC_FS */
 665
 666 static void __exit obdclass_exit(void)
 667 {
 668 #ifdef CONFIG_PROC_FS
 669         __u64 memory_leaked;
 670         __u64 memory_max;
 671 #endif /* CONFIG_PROC_FS */
 672         ENTRY;
 673
 674         lustre_unregister_fs();
 675
 676         misc_deregister(&obd_psdev);
 677         llog_info_fini();
 678 #ifdef HAVE_SERVER_SUPPORT
 679         lu_ucred_global_fini();
 680         dt_global_fini();
 681 #endif /* HAVE_SERVER_SUPPORT */
 682         cl_global_fini();
 683         lu_global_fini();
 684
 685         obd_cleanup_caches();
 686         obd_sysctl_clean();
 687
 688         class_procfs_clean();
 689
 690         class_handle_cleanup();
 691         class_del_uuid(NULL); /* Delete all UUIDs. */
 692         obd_zombie_impexp_stop();
 693
 694 #ifdef CONFIG_PROC_FS
 695         memory_leaked = obd_memory_sum();
 696         memory_max = obd_memory_max();
 697
 698         lprocfs_free_stats(&obd_memory);
 699         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 700                "obd_memory max: %llu, leaked: %llu\n",
 701                memory_max, memory_leaked);
 702 #endif /* CONFIG_PROC_FS */
 703
 704         EXIT;
 705 }
 706
 707 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 708 MODULE_DESCRIPTION("Lustre Class Driver");
 709 MODULE_VERSION(LUSTRE_VERSION_STRING);
 710 MODULE_LICENSE("GPL");
 711
 712 module_init(obdclass_init);
 713 module_exit(obdclass_exit);