lustre/obdclass/class_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_CLASS
  38 #ifndef __KERNEL__
  39 # include <liblustre.h>
  40 #else
  41 # include <asm/atomic.h>
  42 #endif
  43
  44 #include <obd_support.h>
  45 #include <obd_class.h>
  46 #include <lnet/lnetctl.h>
  47 #include <lustre_debug.h>
  48 #include <lprocfs_status.h>
  49 #include <lustre/lustre_build_version.h>
  50 #include <libcfs/list.h>
  51 #include <cl_object.h>
  52 #ifdef HAVE_SERVER_SUPPORT
  53 # include <dt_object.h>
  54 # include <md_object.h>
  55 #endif /* HAVE_SERVER_SUPPORT */
  56 #include "llog_internal.h"
  57
  58 #ifndef __KERNEL__
  59 /* liblustre workaround */
  60 atomic_t libcfs_kmemory = {0};
  61 #endif
  62
  63 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  64 EXPORT_SYMBOL(obd_devs);
  65 cfs_list_t obd_types;
  66 DEFINE_RWLOCK(obd_dev_lock);
  67
  68 __u64 obd_max_pages = 0;
  69 __u64 obd_max_alloc = 0;
  70 #ifndef __KERNEL__
  71 __u64 obd_alloc;
  72 __u64 obd_pages;
  73 #endif
  74 DEFINE_SPINLOCK(obd_updatemax_lock);
  75
  76 /* The following are visible and mutable through /proc/sys/lustre/. */
  77 unsigned int obd_alloc_fail_rate = 0;
  78 EXPORT_SYMBOL(obd_alloc_fail_rate);
  79 unsigned int obd_debug_peer_on_timeout;
  80 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  81 unsigned int obd_dump_on_timeout;
  82 EXPORT_SYMBOL(obd_dump_on_timeout);
  83 unsigned int obd_dump_on_eviction;
  84 EXPORT_SYMBOL(obd_dump_on_eviction);
  85 unsigned int obd_max_dirty_pages = 256;
  86 EXPORT_SYMBOL(obd_max_dirty_pages);
  87 atomic_t obd_unstable_pages;
  88 EXPORT_SYMBOL(obd_unstable_pages);
  89 atomic_t obd_dirty_pages;
  90 EXPORT_SYMBOL(obd_dirty_pages);
  91 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  92 EXPORT_SYMBOL(obd_timeout);
  93 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  94 EXPORT_SYMBOL(ldlm_timeout);
  95 unsigned int obd_timeout_set;
  96 EXPORT_SYMBOL(obd_timeout_set);
  97 unsigned int ldlm_timeout_set;
  98 EXPORT_SYMBOL(ldlm_timeout_set);
  99 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
 100 unsigned int at_min = 0;
 101 EXPORT_SYMBOL(at_min);
 102 unsigned int at_max = 600;
 103 EXPORT_SYMBOL(at_max);
 104 unsigned int at_history = 600;
 105 EXPORT_SYMBOL(at_history);
 106 int at_early_margin = 5;
 107 EXPORT_SYMBOL(at_early_margin);
 108 int at_extra = 30;
 109 EXPORT_SYMBOL(at_extra);
 110
 111 atomic_t obd_dirty_transit_pages;
 112 EXPORT_SYMBOL(obd_dirty_transit_pages);
 113
 114 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 115 EXPORT_SYMBOL(obd_jobid_var);
 116
 117 #ifdef LPROCFS
 118 struct lprocfs_stats *obd_memory = NULL;
 119 EXPORT_SYMBOL(obd_memory);
 120 #endif
 121
 122 /* Get jobid of current process by reading the environment variable
 123  * stored in between the "env_start" & "env_end" of task struct.
 124  *
 125  * TODO:
 126  * It's better to cache the jobid for later use if there is any
 127  * efficient way, the cl_env code probably could be reused for this
 128  * purpose.
 129  *
 130  * If some job scheduler doesn't store jobid in the "env_start/end",
 131  * then an upcall could be issued here to get the jobid by utilizing
 132  * the userspace tools/api. Then, the jobid must be cached.
 133  */
 134 int lustre_get_jobid(char *jobid)
 135 {
 136         int jobid_len = JOBSTATS_JOBID_SIZE;
 137         int rc = 0;
 138         ENTRY;
 139
 140         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 141         /* Jobstats isn't enabled */
 142         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 143                 RETURN(0);
 144
 145         /* Use process name + fsuid as jobid */
 146         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 147                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 148                          current_comm(), current_fsuid());
 149                 RETURN(0);
 150         }
 151
 152         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 153         if (rc) {
 154                 if (rc == -EOVERFLOW) {
 155                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 156                          * variable length strings instead of just numbers), it
 157                          * might make sense to keep the unique parts for JobID,
 158                          * instead of just returning an error.  That means a
 159                          * larger temp buffer for cfs_get_environ(), then
 160                          * truncating the string at some separator to fit into
 161                          * the specified jobid_len.  Fix later if needed. */
 162                         static bool printed;
 163                         if (unlikely(!printed)) {
 164                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 165                                                    "for JobID buffer (%d)\n",
 166                                                    obd_jobid_var, jobid_len);
 167                                 printed = true;
 168                         }
 169                 } else {
 170                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 171                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 172                                "Get jobid for (%s) failed: rc = %d\n",
 173                                obd_jobid_var, rc);
 174                 }
 175         }
 176         RETURN(rc);
 177 }
 178 EXPORT_SYMBOL(lustre_get_jobid);
 179
 180 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 181                    size_t size, const char *file, int line)
 182 {
 183         if (ptr == NULL ||
 184             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 185                 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
 186                        ptr ? "force " :"", type, name, (__u64)size, file,
 187                        line);
 188                 CERROR(LPU64" total bytes and "LPU64" total pages "
 189                        "("LPU64" bytes) allocated by Lustre, "
 190                        "%d total bytes by LNET\n",
 191                        obd_memory_sum(),
 192                        obd_pages_sum() << PAGE_CACHE_SHIFT,
 193                        obd_pages_sum(),
 194                         atomic_read(&libcfs_kmemory));
 195                 return 1;
 196         }
 197         return 0;
 198 }
 199 EXPORT_SYMBOL(obd_alloc_fail);
 200
 201 static inline void obd_data2conn(struct lustre_handle *conn,
 202                                  struct obd_ioctl_data *data)
 203 {
 204         memset(conn, 0, sizeof *conn);
 205         conn->cookie = data->ioc_cookie;
 206 }
 207
 208 static inline void obd_conn2data(struct obd_ioctl_data *data,
 209                                  struct lustre_handle *conn)
 210 {
 211         data->ioc_cookie = conn->cookie;
 212 }
 213
 214 int class_resolve_dev_name(__u32 len, const char *name)
 215 {
 216         int rc;
 217         int dev;
 218
 219         ENTRY;
 220         if (!len || !name) {
 221                 CERROR("No name passed,!\n");
 222                 GOTO(out, rc = -EINVAL);
 223         }
 224         if (name[len - 1] != 0) {
 225                 CERROR("Name not nul terminated!\n");
 226                 GOTO(out, rc = -EINVAL);
 227         }
 228
 229         CDEBUG(D_IOCTL, "device name %s\n", name);
 230         dev = class_name2dev(name);
 231         if (dev == -1) {
 232                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 233                 GOTO(out, rc = -EINVAL);
 234         }
 235
 236         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 237         rc = dev;
 238
 239 out:
 240         RETURN(rc);
 241 }
 242
 243 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 244 {
 245         char *buf = NULL;
 246         struct obd_ioctl_data *data;
 247         struct libcfs_debug_ioctl_data *debug_data;
 248         struct obd_device *obd = NULL;
 249         int err = 0, len = 0;
 250         ENTRY;
 251
 252         /* only for debugging */
 253         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 254                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 255                 libcfs_subsystem_debug = debug_data->subs;
 256                 libcfs_debug = debug_data->debug;
 257                 return 0;
 258         }
 259
 260         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 261         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 262                 CERROR("OBD ioctl: data error\n");
 263                 RETURN(-EINVAL);
 264         }
 265         data = (struct obd_ioctl_data *)buf;
 266
 267         switch (cmd) {
 268         case OBD_IOC_PROCESS_CFG: {
 269                 struct lustre_cfg *lcfg;
 270
 271                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 272                         CERROR("No config buffer passed!\n");
 273                         GOTO(out, err = -EINVAL);
 274                 }
 275                 OBD_ALLOC(lcfg, data->ioc_plen1);
 276                 if (lcfg == NULL)
 277                         GOTO(out, err = -ENOMEM);
 278                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 279                                          data->ioc_plen1);
 280                 if (!err)
 281                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 282                 if (!err)
 283                         err = class_process_config(lcfg);
 284
 285                 OBD_FREE(lcfg, data->ioc_plen1);
 286                 GOTO(out, err);
 287         }
 288
 289         case OBD_GET_VERSION:
 290                 if (!data->ioc_inlbuf1) {
 291                         CERROR("No buffer passed in ioctl\n");
 292                         GOTO(out, err = -EINVAL);
 293                 }
 294
 295                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 296                         CERROR("ioctl buffer too small to hold version\n");
 297                         GOTO(out, err = -EINVAL);
 298                 }
 299
 300                 memcpy(data->ioc_bulk, BUILD_VERSION,
 301                        strlen(BUILD_VERSION) + 1);
 302
 303                 err = obd_ioctl_popdata((void *)arg, data, len);
 304                 if (err)
 305                         err = -EFAULT;
 306                 GOTO(out, err);
 307
 308         case OBD_IOC_NAME2DEV: {
 309                 /* Resolve a device name.  This does not change the
 310                  * currently selected device.
 311                  */
 312                 int dev;
 313
 314                 dev = class_resolve_dev_name(data->ioc_inllen1,
 315                                              data->ioc_inlbuf1);
 316                 data->ioc_dev = dev;
 317                 if (dev < 0)
 318                         GOTO(out, err = -EINVAL);
 319
 320                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 321                 if (err)
 322                         err = -EFAULT;
 323                 GOTO(out, err);
 324         }
 325
 326         case OBD_IOC_UUID2DEV: {
 327                 /* Resolve a device uuid.  This does not change the
 328                  * currently selected device.
 329                  */
 330                 int dev;
 331                 struct obd_uuid uuid;
 332
 333                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 334                         CERROR("No UUID passed!\n");
 335                         GOTO(out, err = -EINVAL);
 336                 }
 337                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 338                         CERROR("UUID not NUL terminated!\n");
 339                         GOTO(out, err = -EINVAL);
 340                 }
 341
 342                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 343                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 344                 dev = class_uuid2dev(&uuid);
 345                 data->ioc_dev = dev;
 346                 if (dev == -1) {
 347                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 348                                data->ioc_inlbuf1);
 349                         GOTO(out, err = -EINVAL);
 350                 }
 351
 352                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 353                        dev);
 354                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 355                 if (err)
 356                         err = -EFAULT;
 357                 GOTO(out, err);
 358         }
 359
 360         case OBD_IOC_CLOSE_UUID: {
 361                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 362                        data->ioc_inlbuf1);
 363                 GOTO(out, err = 0);
 364         }
 365
 366         case OBD_IOC_GETDEVICE: {
 367                 int     index = data->ioc_count;
 368                 char    *status, *str;
 369
 370                 if (!data->ioc_inlbuf1) {
 371                         CERROR("No buffer passed in ioctl\n");
 372                         GOTO(out, err = -EINVAL);
 373                 }
 374                 if (data->ioc_inllen1 < 128) {
 375                         CERROR("ioctl buffer too small to hold version\n");
 376                         GOTO(out, err = -EINVAL);
 377                 }
 378
 379                 obd = class_num2obd(index);
 380                 if (!obd)
 381                         GOTO(out, err = -ENOENT);
 382
 383                 if (obd->obd_stopping)
 384                         status = "ST";
 385                 else if (obd->obd_set_up)
 386                         status = "UP";
 387                 else if (obd->obd_attached)
 388                         status = "AT";
 389                 else
 390                         status = "--";
 391                 str = (char *)data->ioc_bulk;
 392                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 393                          (int)index, status, obd->obd_type->typ_name,
 394                          obd->obd_name, obd->obd_uuid.uuid,
 395                          atomic_read(&obd->obd_refcount));
 396                 err = obd_ioctl_popdata((void *)arg, data, len);
 397
 398                 GOTO(out, err = 0);
 399         }
 400
 401         }
 402
 403         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 404                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 405                         GOTO(out, err = -EINVAL);
 406                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 407                         GOTO(out, err = -EINVAL);
 408                 obd = class_name2obd(data->ioc_inlbuf4);
 409         } else if (data->ioc_dev < class_devno_max()) {
 410                 obd = class_num2obd(data->ioc_dev);
 411         } else {
 412                 CERROR("OBD ioctl: No device\n");
 413                 GOTO(out, err = -EINVAL);
 414         }
 415
 416         if (obd == NULL) {
 417                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 418                 GOTO(out, err = -EINVAL);
 419         }
 420         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 421
 422         if (!obd->obd_set_up || obd->obd_stopping) {
 423                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 424                 GOTO(out, err = -EINVAL);
 425         }
 426
 427         switch(cmd) {
 428         case OBD_IOC_NO_TRANSNO: {
 429                 if (!obd->obd_attached) {
 430                         CERROR("Device %d not attached\n", obd->obd_minor);
 431                         GOTO(out, err = -ENODEV);
 432                 }
 433                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 434                        obd->obd_name);
 435                 obd->obd_no_transno = 1;
 436                 GOTO(out, err = 0);
 437         }
 438
 439         default: {
 440                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 441                 if (err)
 442                         GOTO(out, err);
 443
 444                 err = obd_ioctl_popdata((void *)arg, data, len);
 445                 if (err)
 446                         err = -EFAULT;
 447                 GOTO(out, err);
 448         }
 449         }
 450
 451  out:
 452         if (buf)
 453                 obd_ioctl_freedata(buf, len);
 454         RETURN(err);
 455 } /* class_handle_ioctl */
 456
 457 #ifdef __KERNEL__
 458 extern struct miscdevice obd_psdev;
 459 #else
 460 struct miscdevice obd_psdev;
 461 #endif
 462
 463 #define OBD_INIT_CHECK
 464 #ifdef OBD_INIT_CHECK
 465 int obd_init_checks(void)
 466 {
 467         __u64 u64val, div64val;
 468         char buf[64];
 469         int len, ret = 0;
 470
 471         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 472
 473         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 474
 475         u64val = OBD_OBJECT_EOF;
 476         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 477         if (u64val != OBD_OBJECT_EOF) {
 478                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 479                        u64val, (int)sizeof(u64val));
 480                 ret = -EINVAL;
 481         }
 482         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 483         if (len != 18) {
 484                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 485                 ret = -EINVAL;
 486         }
 487
 488         div64val = OBD_OBJECT_EOF;
 489         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 490         if (u64val != OBD_OBJECT_EOF) {
 491                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 492                        u64val, (int)sizeof(u64val));
 493                 ret = -EOVERFLOW;
 494         }
 495         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 496                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 497                        u64val, (int)sizeof(u64val));
 498                 return -EOVERFLOW;
 499         }
 500         if (do_div(div64val, 256) != (u64val & 255)) {
 501                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 502                 return -EOVERFLOW;
 503         }
 504         if (u64val >> 8 != div64val) {
 505                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 506                        u64val, div64val, u64val >> 8);
 507                 return -EOVERFLOW;
 508         }
 509         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 510         if (len != 18) {
 511                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 512                 ret = -EINVAL;
 513         }
 514         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 515         if (len != 20) {
 516                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 517                 ret = -EINVAL;
 518         }
 519         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 520         if (len != 2) {
 521                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 522                 ret = -EINVAL;
 523         }
 524         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 525                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 526                       (__u64)PAGE_CACHE_SIZE);
 527                 ret = -EINVAL;
 528         }
 529
 530         return ret;
 531 }
 532 #else
 533 #define obd_init_checks() do {} while(0)
 534 #endif
 535
 536 extern spinlock_t obd_types_lock;
 537 extern int class_procfs_init(void);
 538 extern int class_procfs_clean(void);
 539
 540 #ifdef __KERNEL__
 541 static int __init init_obdclass(void)
 542 #else
 543 int init_obdclass(void)
 544 #endif
 545 {
 546         int i, err;
 547 #ifdef __KERNEL__
 548         int lustre_register_fs(void);
 549
 550         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 551                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 552 #endif
 553
 554         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 555
 556         spin_lock_init(&obd_types_lock);
 557         obd_zombie_impexp_init();
 558 #ifdef LPROCFS
 559         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 560                                          LPROCFS_STATS_FLAG_NONE |
 561                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 562         if (obd_memory == NULL) {
 563                 CERROR("kmalloc of 'obd_memory' failed\n");
 564                 RETURN(-ENOMEM);
 565         }
 566
 567         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 568                              LPROCFS_CNTR_AVGMINMAX,
 569                              "memused", "bytes");
 570         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 571                              LPROCFS_CNTR_AVGMINMAX,
 572                              "pagesused", "pages");
 573 #endif
 574         err = obd_init_checks();
 575         if (err == -EOVERFLOW)
 576                 return err;
 577
 578         class_init_uuidlist();
 579         err = class_handle_init();
 580         if (err)
 581                 return err;
 582
 583         CFS_INIT_LIST_HEAD(&obd_types);
 584
 585         err = misc_register(&obd_psdev);
 586         if (err) {
 587                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 588                 return err;
 589         }
 590
 591         /* This struct is already zeroed for us (static global) */
 592         for (i = 0; i < class_devno_max(); i++)
 593                 obd_devs[i] = NULL;
 594
 595         /* Default the dirty page cache cap to 1/2 of system memory.
 596          * For clients with less memory, a larger fraction is needed
 597          * for other purposes (mostly for BGL). */
 598         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 599                 obd_max_dirty_pages = totalram_pages / 4;
 600         else
 601                 obd_max_dirty_pages = totalram_pages / 2;
 602
 603         err = obd_init_caches();
 604         if (err)
 605                 return err;
 606 #ifdef __KERNEL__
 607         err = class_procfs_init();
 608         if (err)
 609                 return err;
 610 #endif
 611
 612         err = lu_global_init();
 613         if (err)
 614                 return err;
 615
 616         err = lu_capainfo_init();
 617         if (err)
 618                 return err;
 619
 620         err = cl_global_init();
 621         if (err != 0)
 622                 return err;
 623
 624 #if defined(__KERNEL__) && defined(HAVE_SERVER_SUPPORT)
 625         err = dt_global_init();
 626         if (err != 0)
 627                 return err;
 628
 629         err = lu_ucred_global_init();
 630         if (err != 0)
 631                 return err;
 632 #endif
 633
 634         err = llog_info_init();
 635         if (err)
 636                 return err;
 637
 638 #ifdef __KERNEL__
 639         err = lustre_register_fs();
 640 #endif
 641
 642         return err;
 643 }
 644
 645 void obd_update_maxusage(void)
 646 {
 647         __u64 max1, max2;
 648
 649         max1 = obd_pages_sum();
 650         max2 = obd_memory_sum();
 651
 652         spin_lock(&obd_updatemax_lock);
 653         if (max1 > obd_max_pages)
 654                 obd_max_pages = max1;
 655         if (max2 > obd_max_alloc)
 656                 obd_max_alloc = max2;
 657         spin_unlock(&obd_updatemax_lock);
 658 }
 659 EXPORT_SYMBOL(obd_update_maxusage);
 660
 661 #ifdef LPROCFS
 662 __u64 obd_memory_max(void)
 663 {
 664         __u64 ret;
 665
 666         spin_lock(&obd_updatemax_lock);
 667         ret = obd_max_alloc;
 668         spin_unlock(&obd_updatemax_lock);
 669
 670         return ret;
 671 }
 672 EXPORT_SYMBOL(obd_memory_max);
 673
 674 __u64 obd_pages_max(void)
 675 {
 676         __u64 ret;
 677
 678         spin_lock(&obd_updatemax_lock);
 679         ret = obd_max_pages;
 680         spin_unlock(&obd_updatemax_lock);
 681
 682         return ret;
 683 }
 684 EXPORT_SYMBOL(obd_pages_max);
 685 #endif
 686
 687 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 688  * ifdef to the end of the file to cover module and versioning goo.*/
 689 #ifdef __KERNEL__
 690 static void cleanup_obdclass(void)
 691 {
 692         int i;
 693         int lustre_unregister_fs(void);
 694         __u64 memory_leaked, pages_leaked;
 695         __u64 memory_max, pages_max;
 696         ENTRY;
 697
 698         lustre_unregister_fs();
 699
 700         misc_deregister(&obd_psdev);
 701         for (i = 0; i < class_devno_max(); i++) {
 702                 struct obd_device *obd = class_num2obd(i);
 703                 if (obd && obd->obd_set_up &&
 704                     OBT(obd) && OBP(obd, detach)) {
 705                         /* XXX should this call generic detach otherwise? */
 706                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 707                         OBP(obd, detach)(obd);
 708                 }
 709         }
 710         llog_info_fini();
 711 #ifdef HAVE_SERVER_SUPPORT
 712         lu_ucred_global_fini();
 713         dt_global_fini();
 714 #endif
 715         cl_global_fini();
 716         lu_capainfo_fini();
 717         lu_global_fini();
 718
 719         obd_cleanup_caches();
 720         obd_sysctl_clean();
 721
 722         class_procfs_clean();
 723
 724         class_handle_cleanup();
 725         class_exit_uuidlist();
 726         obd_zombie_impexp_stop();
 727
 728         memory_leaked = obd_memory_sum();
 729         pages_leaked = obd_pages_sum();
 730
 731         memory_max = obd_memory_max();
 732         pages_max = obd_pages_max();
 733
 734         lprocfs_free_stats(&obd_memory);
 735         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 736                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 737                memory_max, memory_leaked);
 738         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 739                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 740                pages_max, pages_leaked);
 741
 742         EXIT;
 743 }
 744
 745 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 746 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 747 MODULE_LICENSE("GPL");
 748
 749 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 750 #endif