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 <uapi/linux/lnet/lnetctl.h>
  45 #include <lustre_debug.h>
  46 #include <lustre_kernelcomm.h>
  47 #include <lprocfs_status.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 <uapi/linux/lustre/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 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
 260         case OBD_GET_VERSION: {
 261                 static bool warned;
 262
 263                 if (!data->ioc_inlbuf1) {
 264                         CERROR("No buffer passed in ioctl\n");
 265                         GOTO(out, err = -EINVAL);
 266                 }
 267
 268                 if (strlen(LUSTRE_VERSION_STRING) + 1 > data->ioc_inllen1) {
 269                         CERROR("ioctl buffer too small to hold version\n");
 270                         GOTO(out, err = -EINVAL);
 271                 }
 272
 273                 if (!warned) {
 274                         warned = true;
 275                         CWARN("%s: ioctl(OBD_GET_VERSION) is deprecated, "
 276                               "use llapi_get_version_string() and/or relink\n",
 277                               current->comm);
 278                 }
 279                 memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING,
 280                        strlen(LUSTRE_VERSION_STRING) + 1);
 281
 282                 if (copy_to_user((void __user *)arg, data, len))
 283                         err = -EFAULT;
 284                 GOTO(out, err);
 285         }
 286 #endif
 287         case OBD_IOC_NAME2DEV: {
 288                 /* Resolve a device name.  This does not change the
 289                  * currently selected device.
 290                  */
 291                 int dev;
 292
 293                 dev = class_resolve_dev_name(data->ioc_inllen1,
 294                                              data->ioc_inlbuf1);
 295                 data->ioc_dev = dev;
 296                 if (dev < 0)
 297                         GOTO(out, err = -EINVAL);
 298
 299                 if (copy_to_user((void __user *)arg, data, sizeof(*data)))
 300                         err = -EFAULT;
 301                 GOTO(out, err);
 302         }
 303
 304         case OBD_IOC_UUID2DEV: {
 305                 /* Resolve a device uuid.  This does not change the
 306                  * currently selected device.
 307                  */
 308                 int dev;
 309                 struct obd_uuid uuid;
 310
 311                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 312                         CERROR("No UUID passed!\n");
 313                         GOTO(out, err = -EINVAL);
 314                 }
 315                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 316                         CERROR("UUID not NUL terminated!\n");
 317                         GOTO(out, err = -EINVAL);
 318                 }
 319
 320                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 321                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 322                 dev = class_uuid2dev(&uuid);
 323                 data->ioc_dev = dev;
 324                 if (dev == -1) {
 325                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 326                                data->ioc_inlbuf1);
 327                         GOTO(out, err = -EINVAL);
 328                 }
 329
 330                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 331                        dev);
 332                 if (copy_to_user((void __user *)arg, data, sizeof(*data)))
 333                         err = -EFAULT;
 334                 GOTO(out, err);
 335         }
 336
 337         case OBD_IOC_GETDEVICE: {
 338                 int     index = data->ioc_count;
 339                 char    *status, *str;
 340
 341                 if (!data->ioc_inlbuf1) {
 342                         CERROR("No buffer passed in ioctl\n");
 343                         GOTO(out, err = -EINVAL);
 344                 }
 345                 if (data->ioc_inllen1 < 128) {
 346                         CERROR("ioctl buffer too small to hold version\n");
 347                         GOTO(out, err = -EINVAL);
 348                 }
 349
 350                 obd = class_num2obd(index);
 351                 if (!obd)
 352                         GOTO(out, err = -ENOENT);
 353
 354                 if (obd->obd_stopping)
 355                         status = "ST";
 356                 else if (obd->obd_set_up)
 357                         status = "UP";
 358                 else if (obd->obd_attached)
 359                         status = "AT";
 360                 else
 361                         status = "--";
 362                 str = (char *)data->ioc_bulk;
 363                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 364                          (int)index, status, obd->obd_type->typ_name,
 365                          obd->obd_name, obd->obd_uuid.uuid,
 366                          atomic_read(&obd->obd_refcount));
 367
 368                 if (copy_to_user((void __user *)arg, data, len))
 369                         err = -EFAULT;
 370
 371                 GOTO(out, err);
 372         }
 373
 374         }
 375
 376         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 377                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 378                         GOTO(out, err = -EINVAL);
 379                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 380                         GOTO(out, err = -EINVAL);
 381                 obd = class_name2obd(data->ioc_inlbuf4);
 382         } else if (data->ioc_dev < class_devno_max()) {
 383                 obd = class_num2obd(data->ioc_dev);
 384         } else {
 385                 CERROR("OBD ioctl: No device\n");
 386                 GOTO(out, err = -EINVAL);
 387         }
 388
 389         if (obd == NULL) {
 390                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 391                 GOTO(out, err = -EINVAL);
 392         }
 393         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 394
 395         if (!obd->obd_set_up || obd->obd_stopping) {
 396                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 397                 GOTO(out, err = -EINVAL);
 398         }
 399
 400         switch(cmd) {
 401         case OBD_IOC_NO_TRANSNO: {
 402                 if (!obd->obd_attached) {
 403                         CERROR("Device %d not attached\n", obd->obd_minor);
 404                         GOTO(out, err = -ENODEV);
 405                 }
 406                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 407                        obd->obd_name);
 408                 obd->obd_no_transno = 1;
 409                 GOTO(out, err = 0);
 410         }
 411
 412         default: {
 413                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 414                 if (err)
 415                         GOTO(out, err);
 416
 417                 if (copy_to_user((void __user *)arg, data, len))
 418                         err = -EFAULT;
 419                 GOTO(out, err);
 420         }
 421         }
 422
 423 out:
 424         OBD_FREE_LARGE(buf, len);
 425         RETURN(err);
 426 } /* class_handle_ioctl */
 427
 428 #define OBD_INIT_CHECK
 429 #ifdef OBD_INIT_CHECK
 430 static int obd_init_checks(void)
 431 {
 432         __u64 u64val, div64val;
 433         char buf[64];
 434         int len, ret = 0;
 435
 436         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
 437
 438         u64val = OBD_OBJECT_EOF;
 439         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 440         if (u64val != OBD_OBJECT_EOF) {
 441                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 442                        u64val, (int)sizeof(u64val));
 443                 ret = -EINVAL;
 444         }
 445         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 446         if (len != 18) {
 447                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 448                 ret = -EINVAL;
 449         }
 450
 451         div64val = OBD_OBJECT_EOF;
 452         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 453         if (u64val != OBD_OBJECT_EOF) {
 454                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 455                        u64val, (int)sizeof(u64val));
 456                 ret = -EOVERFLOW;
 457         }
 458         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 459                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 460                        u64val, (int)sizeof(u64val));
 461                 return -EOVERFLOW;
 462         }
 463         if (do_div(div64val, 256) != (u64val & 255)) {
 464                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255);
 465                 return -EOVERFLOW;
 466         }
 467         if (u64val >> 8 != div64val) {
 468                 CERROR("do_div(%#llx,256) %llu != %llu\n",
 469                        u64val, div64val, u64val >> 8);
 470                 return -EOVERFLOW;
 471         }
 472         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 473         if (len != 18) {
 474                 CWARN("u64 hex wrong length! strlen(%s)=%d != 18\n", buf, len);
 475                 ret = -EINVAL;
 476         }
 477         len = snprintf(buf, sizeof(buf), "%llu", u64val);
 478         if (len != 20) {
 479                 CWARN("u64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 480                 ret = -EINVAL;
 481         }
 482         len = snprintf(buf, sizeof(buf), "%lld", u64val);
 483         if (len != 2) {
 484                 CWARN("s64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 485                 ret = -EINVAL;
 486         }
 487         if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) {
 488                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
 489                       (__u64)PAGE_SIZE);
 490                 ret = -EINVAL;
 491         }
 492
 493         return ret;
 494 }
 495 #else
 496 #define obd_init_checks() do {} while(0)
 497 #endif
 498
 499 static int __init obdclass_init(void)
 500 {
 501         int err;
 502
 503         LCONSOLE_INFO("Lustre: Build Version: "LUSTRE_VERSION_STRING"\n");
 504
 505         libcfs_kkuc_init();
 506
 507         err = obd_init_checks();
 508         if (err == -EOVERFLOW)
 509                 return err;
 510
 511 #ifdef CONFIG_PROC_FS
 512         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 513                                          LPROCFS_STATS_FLAG_NONE |
 514                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 515         if (obd_memory == NULL) {
 516                 CERROR("kmalloc of 'obd_memory' failed\n");
 517                 return -ENOMEM;
 518         }
 519
 520         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 521                              LPROCFS_CNTR_AVGMINMAX,
 522                              "memused", "bytes");
 523 #endif
 524         err = obd_zombie_impexp_init();
 525         if (err)
 526                 goto cleanup_obd_memory;
 527
 528         err = class_handle_init();
 529         if (err)
 530                 goto cleanup_zombie_impexp;
 531
 532         err = misc_register(&obd_psdev);
 533         if (err) {
 534                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 535                 goto cleanup_class_handle;
 536         }
 537
 538         /* Default the dirty page cache cap to 1/2 of system memory.
 539          * For clients with less memory, a larger fraction is needed
 540          * for other purposes (mostly for BGL). */
 541         if (totalram_pages <= 512 << (20 - PAGE_SHIFT))
 542                 obd_max_dirty_pages = totalram_pages / 4;
 543         else
 544                 obd_max_dirty_pages = totalram_pages / 2;
 545
 546         err = obd_init_caches();
 547         if (err)
 548                 goto cleanup_deregister;
 549
 550         err = class_procfs_init();
 551         if (err)
 552                 goto cleanup_caches;
 553
 554         err = lu_global_init();
 555         if (err)
 556                 goto cleanup_class_procfs;
 557
 558         err = cl_global_init();
 559         if (err != 0)
 560                 goto cleanup_lu_global;
 561
 562 #ifdef HAVE_SERVER_SUPPORT
 563         err = dt_global_init();
 564         if (err != 0)
 565                 goto cleanup_cl_global;
 566
 567         err = lu_ucred_global_init();
 568         if (err != 0)
 569                 goto cleanup_dt_global;
 570 #endif /* HAVE_SERVER_SUPPORT */
 571
 572         err = llog_info_init();
 573         if (err)
 574 #ifdef HAVE_SERVER_SUPPORT
 575                 goto cleanup_lu_ucred_global;
 576 #else /* !HAVE_SERVER_SUPPORT */
 577                 goto cleanup_cl_global;
 578 #endif /* HAVE_SERVER_SUPPORT */
 579
 580         err = lustre_register_fs();
 581
 582         /* simulate a late OOM situation now to require all
 583          * alloc'ed/initialized resources to be freed */
 584         if (OBD_FAIL_CHECK(OBD_FAIL_OBDCLASS_MODULE_LOAD)) {
 585                 /* fake error but filesystem has been registered */
 586                 lustre_unregister_fs();
 587                 /* force error to ensure module will be unloaded/cleaned */
 588                 err = -ENOMEM;
 589         }
 590
 591         if (err)
 592                 goto cleanup_llog_info;
 593
 594         return 0;
 595
 596 cleanup_llog_info:
 597         llog_info_fini();
 598
 599 #ifdef HAVE_SERVER_SUPPORT
 600 cleanup_lu_ucred_global:
 601         lu_ucred_global_fini();
 602
 603 cleanup_dt_global:
 604         dt_global_fini();
 605 #endif /* HAVE_SERVER_SUPPORT */
 606
 607 cleanup_cl_global:
 608         cl_global_fini();
 609
 610 cleanup_lu_global:
 611         lu_global_fini();
 612
 613 cleanup_class_procfs:
 614         obd_sysctl_clean();
 615         class_procfs_clean();
 616
 617 cleanup_caches:
 618         obd_cleanup_caches();
 619
 620 cleanup_deregister:
 621         misc_deregister(&obd_psdev);
 622
 623 cleanup_class_handle:
 624         class_handle_cleanup();
 625
 626 cleanup_zombie_impexp:
 627         obd_zombie_impexp_stop();
 628
 629 cleanup_obd_memory:
 630 #ifdef CONFIG_PROC_FS
 631         lprocfs_free_stats(&obd_memory);
 632 #endif
 633
 634         return err;
 635 }
 636
 637 void obd_update_maxusage(void)
 638 {
 639         __u64 max;
 640
 641         max = obd_memory_sum();
 642
 643         spin_lock(&obd_updatemax_lock);
 644         if (max > obd_max_alloc)
 645                 obd_max_alloc = max;
 646         spin_unlock(&obd_updatemax_lock);
 647 }
 648 EXPORT_SYMBOL(obd_update_maxusage);
 649
 650 #ifdef CONFIG_PROC_FS
 651 __u64 obd_memory_max(void)
 652 {
 653         __u64 ret;
 654
 655         obd_update_maxusage();
 656         spin_lock(&obd_updatemax_lock);
 657         ret = obd_max_alloc;
 658         spin_unlock(&obd_updatemax_lock);
 659
 660         return ret;
 661 }
 662 #endif /* CONFIG_PROC_FS */
 663
 664 static void __exit obdclass_exit(void)
 665 {
 666 #ifdef CONFIG_PROC_FS
 667         __u64 memory_leaked;
 668         __u64 memory_max;
 669 #endif /* CONFIG_PROC_FS */
 670         ENTRY;
 671
 672         lustre_unregister_fs();
 673
 674         misc_deregister(&obd_psdev);
 675         llog_info_fini();
 676 #ifdef HAVE_SERVER_SUPPORT
 677         lu_ucred_global_fini();
 678         dt_global_fini();
 679 #endif /* HAVE_SERVER_SUPPORT */
 680         cl_global_fini();
 681         lu_global_fini();
 682
 683         obd_cleanup_caches();
 684         obd_sysctl_clean();
 685
 686         class_procfs_clean();
 687
 688         class_handle_cleanup();
 689         class_del_uuid(NULL); /* Delete all UUIDs. */
 690         obd_zombie_impexp_stop();
 691
 692 #ifdef CONFIG_PROC_FS
 693         memory_leaked = obd_memory_sum();
 694         memory_max = obd_memory_max();
 695
 696         lprocfs_free_stats(&obd_memory);
 697         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 698                "obd_memory max: %llu, leaked: %llu\n",
 699                memory_max, memory_leaked);
 700 #endif /* CONFIG_PROC_FS */
 701
 702         EXIT;
 703 }
 704
 705 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 706 MODULE_DESCRIPTION("Lustre Class Driver");
 707 MODULE_VERSION(LUSTRE_VERSION_STRING);
 708 MODULE_LICENSE("GPL");
 709
 710 module_init(obdclass_init);
 711 module_exit(obdclass_exit);