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