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