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