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(),
 149                          from_kuid(&init_user_ns, current_fsuid()));
 150                 RETURN(0);
 151         }
 152
 153         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 154         if (rc) {
 155                 if (rc == -EOVERFLOW) {
 156                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 157                          * variable length strings instead of just numbers), it
 158                          * might make sense to keep the unique parts for JobID,
 159                          * instead of just returning an error.  That means a
 160                          * larger temp buffer for cfs_get_environ(), then
 161                          * truncating the string at some separator to fit into
 162                          * the specified jobid_len.  Fix later if needed. */
 163                         static bool printed;
 164                         if (unlikely(!printed)) {
 165                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 166                                                    "for JobID buffer (%d)\n",
 167                                                    obd_jobid_var, jobid_len);
 168                                 printed = true;
 169                         }
 170                 } else {
 171                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 172                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 173                                "Get jobid for (%s) failed: rc = %d\n",
 174                                obd_jobid_var, rc);
 175                 }
 176         }
 177         RETURN(rc);
 178 }
 179 EXPORT_SYMBOL(lustre_get_jobid);
 180
 181 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 182                    size_t size, const char *file, int line)
 183 {
 184         if (ptr == NULL ||
 185             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 186                 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
 187                        ptr ? "force " :"", type, name, (__u64)size, file,
 188                        line);
 189                 CERROR(LPU64" total bytes and "LPU64" total pages "
 190                        "("LPU64" bytes) allocated by Lustre, "
 191                        "%d total bytes by LNET\n",
 192                        obd_memory_sum(),
 193                        obd_pages_sum() << PAGE_CACHE_SHIFT,
 194                        obd_pages_sum(),
 195                         atomic_read(&libcfs_kmemory));
 196                 return 1;
 197         }
 198         return 0;
 199 }
 200 EXPORT_SYMBOL(obd_alloc_fail);
 201
 202 static inline void obd_data2conn(struct lustre_handle *conn,
 203                                  struct obd_ioctl_data *data)
 204 {
 205         memset(conn, 0, sizeof *conn);
 206         conn->cookie = data->ioc_cookie;
 207 }
 208
 209 static inline void obd_conn2data(struct obd_ioctl_data *data,
 210                                  struct lustre_handle *conn)
 211 {
 212         data->ioc_cookie = conn->cookie;
 213 }
 214
 215 int class_resolve_dev_name(__u32 len, const char *name)
 216 {
 217         int rc;
 218         int dev;
 219
 220         ENTRY;
 221         if (!len || !name) {
 222                 CERROR("No name passed,!\n");
 223                 GOTO(out, rc = -EINVAL);
 224         }
 225         if (name[len - 1] != 0) {
 226                 CERROR("Name not nul terminated!\n");
 227                 GOTO(out, rc = -EINVAL);
 228         }
 229
 230         CDEBUG(D_IOCTL, "device name %s\n", name);
 231         dev = class_name2dev(name);
 232         if (dev == -1) {
 233                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 234                 GOTO(out, rc = -EINVAL);
 235         }
 236
 237         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 238         rc = dev;
 239
 240 out:
 241         RETURN(rc);
 242 }
 243
 244 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 245 {
 246         char *buf = NULL;
 247         struct obd_ioctl_data *data;
 248         struct libcfs_debug_ioctl_data *debug_data;
 249         struct obd_device *obd = NULL;
 250         int err = 0, len = 0;
 251         ENTRY;
 252
 253         /* only for debugging */
 254         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 255                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 256                 libcfs_subsystem_debug = debug_data->subs;
 257                 libcfs_debug = debug_data->debug;
 258                 return 0;
 259         }
 260
 261         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 262         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 263                 CERROR("OBD ioctl: data error\n");
 264                 RETURN(-EINVAL);
 265         }
 266         data = (struct obd_ioctl_data *)buf;
 267
 268         switch (cmd) {
 269         case OBD_IOC_PROCESS_CFG: {
 270                 struct lustre_cfg *lcfg;
 271
 272                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 273                         CERROR("No config buffer passed!\n");
 274                         GOTO(out, err = -EINVAL);
 275                 }
 276                 OBD_ALLOC(lcfg, data->ioc_plen1);
 277                 if (lcfg == NULL)
 278                         GOTO(out, err = -ENOMEM);
 279                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 280                                          data->ioc_plen1);
 281                 if (!err)
 282                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 283                 if (!err)
 284                         err = class_process_config(lcfg);
 285
 286                 OBD_FREE(lcfg, data->ioc_plen1);
 287                 GOTO(out, err);
 288         }
 289
 290         case OBD_GET_VERSION:
 291                 if (!data->ioc_inlbuf1) {
 292                         CERROR("No buffer passed in ioctl\n");
 293                         GOTO(out, err = -EINVAL);
 294                 }
 295
 296                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 297                         CERROR("ioctl buffer too small to hold version\n");
 298                         GOTO(out, err = -EINVAL);
 299                 }
 300
 301                 memcpy(data->ioc_bulk, BUILD_VERSION,
 302                        strlen(BUILD_VERSION) + 1);
 303
 304                 err = obd_ioctl_popdata((void *)arg, data, len);
 305                 if (err)
 306                         err = -EFAULT;
 307                 GOTO(out, err);
 308
 309         case OBD_IOC_NAME2DEV: {
 310                 /* Resolve a device name.  This does not change the
 311                  * currently selected device.
 312                  */
 313                 int dev;
 314
 315                 dev = class_resolve_dev_name(data->ioc_inllen1,
 316                                              data->ioc_inlbuf1);
 317                 data->ioc_dev = dev;
 318                 if (dev < 0)
 319                         GOTO(out, err = -EINVAL);
 320
 321                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 322                 if (err)
 323                         err = -EFAULT;
 324                 GOTO(out, err);
 325         }
 326
 327         case OBD_IOC_UUID2DEV: {
 328                 /* Resolve a device uuid.  This does not change the
 329                  * currently selected device.
 330                  */
 331                 int dev;
 332                 struct obd_uuid uuid;
 333
 334                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 335                         CERROR("No UUID passed!\n");
 336                         GOTO(out, err = -EINVAL);
 337                 }
 338                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 339                         CERROR("UUID not NUL terminated!\n");
 340                         GOTO(out, err = -EINVAL);
 341                 }
 342
 343                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 344                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 345                 dev = class_uuid2dev(&uuid);
 346                 data->ioc_dev = dev;
 347                 if (dev == -1) {
 348                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 349                                data->ioc_inlbuf1);
 350                         GOTO(out, err = -EINVAL);
 351                 }
 352
 353                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 354                        dev);
 355                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 356                 if (err)
 357                         err = -EFAULT;
 358                 GOTO(out, err);
 359         }
 360
 361         case OBD_IOC_CLOSE_UUID: {
 362                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 363                        data->ioc_inlbuf1);
 364                 GOTO(out, err = 0);
 365         }
 366
 367         case OBD_IOC_GETDEVICE: {
 368                 int     index = data->ioc_count;
 369                 char    *status, *str;
 370
 371                 if (!data->ioc_inlbuf1) {
 372                         CERROR("No buffer passed in ioctl\n");
 373                         GOTO(out, err = -EINVAL);
 374                 }
 375                 if (data->ioc_inllen1 < 128) {
 376                         CERROR("ioctl buffer too small to hold version\n");
 377                         GOTO(out, err = -EINVAL);
 378                 }
 379
 380                 obd = class_num2obd(index);
 381                 if (!obd)
 382                         GOTO(out, err = -ENOENT);
 383
 384                 if (obd->obd_stopping)
 385                         status = "ST";
 386                 else if (obd->obd_set_up)
 387                         status = "UP";
 388                 else if (obd->obd_attached)
 389                         status = "AT";
 390                 else
 391                         status = "--";
 392                 str = (char *)data->ioc_bulk;
 393                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 394                          (int)index, status, obd->obd_type->typ_name,
 395                          obd->obd_name, obd->obd_uuid.uuid,
 396                          atomic_read(&obd->obd_refcount));
 397                 err = obd_ioctl_popdata((void *)arg, data, len);
 398
 399                 GOTO(out, err = 0);
 400         }
 401
 402         }
 403
 404         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 405                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 406                         GOTO(out, err = -EINVAL);
 407                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 408                         GOTO(out, err = -EINVAL);
 409                 obd = class_name2obd(data->ioc_inlbuf4);
 410         } else if (data->ioc_dev < class_devno_max()) {
 411                 obd = class_num2obd(data->ioc_dev);
 412         } else {
 413                 CERROR("OBD ioctl: No device\n");
 414                 GOTO(out, err = -EINVAL);
 415         }
 416
 417         if (obd == NULL) {
 418                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 419                 GOTO(out, err = -EINVAL);
 420         }
 421         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 422
 423         if (!obd->obd_set_up || obd->obd_stopping) {
 424                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 425                 GOTO(out, err = -EINVAL);
 426         }
 427
 428         switch(cmd) {
 429         case OBD_IOC_NO_TRANSNO: {
 430                 if (!obd->obd_attached) {
 431                         CERROR("Device %d not attached\n", obd->obd_minor);
 432                         GOTO(out, err = -ENODEV);
 433                 }
 434                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 435                        obd->obd_name);
 436                 obd->obd_no_transno = 1;
 437                 GOTO(out, err = 0);
 438         }
 439
 440         default: {
 441                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 442                 if (err)
 443                         GOTO(out, err);
 444
 445                 err = obd_ioctl_popdata((void *)arg, data, len);
 446                 if (err)
 447                         err = -EFAULT;
 448                 GOTO(out, err);
 449         }
 450         }
 451
 452  out:
 453         if (buf)
 454                 obd_ioctl_freedata(buf, len);
 455         RETURN(err);
 456 } /* class_handle_ioctl */
 457
 458 #ifdef __KERNEL__
 459 extern struct miscdevice obd_psdev;
 460 #else
 461 struct miscdevice obd_psdev;
 462 #endif
 463
 464 #define OBD_INIT_CHECK
 465 #ifdef OBD_INIT_CHECK
 466 int obd_init_checks(void)
 467 {
 468         __u64 u64val, div64val;
 469         char buf[64];
 470         int len, ret = 0;
 471
 472         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 473
 474         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 475
 476         u64val = OBD_OBJECT_EOF;
 477         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 478         if (u64val != OBD_OBJECT_EOF) {
 479                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 480                        u64val, (int)sizeof(u64val));
 481                 ret = -EINVAL;
 482         }
 483         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 484         if (len != 18) {
 485                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 486                 ret = -EINVAL;
 487         }
 488
 489         div64val = OBD_OBJECT_EOF;
 490         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 491         if (u64val != OBD_OBJECT_EOF) {
 492                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 493                        u64val, (int)sizeof(u64val));
 494                 ret = -EOVERFLOW;
 495         }
 496         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 497                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 498                        u64val, (int)sizeof(u64val));
 499                 return -EOVERFLOW;
 500         }
 501         if (do_div(div64val, 256) != (u64val & 255)) {
 502                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 503                 return -EOVERFLOW;
 504         }
 505         if (u64val >> 8 != div64val) {
 506                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 507                        u64val, div64val, u64val >> 8);
 508                 return -EOVERFLOW;
 509         }
 510         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 511         if (len != 18) {
 512                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 513                 ret = -EINVAL;
 514         }
 515         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 516         if (len != 20) {
 517                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 518                 ret = -EINVAL;
 519         }
 520         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 521         if (len != 2) {
 522                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 523                 ret = -EINVAL;
 524         }
 525         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 526                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 527                       (__u64)PAGE_CACHE_SIZE);
 528                 ret = -EINVAL;
 529         }
 530
 531         return ret;
 532 }
 533 #else
 534 #define obd_init_checks() do {} while(0)
 535 #endif
 536
 537 extern spinlock_t obd_types_lock;
 538 extern int class_procfs_init(void);
 539 extern int class_procfs_clean(void);
 540
 541 #ifdef __KERNEL__
 542 static int __init init_obdclass(void)
 543 #else
 544 int init_obdclass(void)
 545 #endif
 546 {
 547         int i, err;
 548 #ifdef __KERNEL__
 549         int lustre_register_fs(void);
 550
 551         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 552                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 553 #endif
 554
 555         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 556
 557         spin_lock_init(&obd_types_lock);
 558         obd_zombie_impexp_init();
 559 #ifdef LPROCFS
 560         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 561                                          LPROCFS_STATS_FLAG_NONE |
 562                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 563         if (obd_memory == NULL) {
 564                 CERROR("kmalloc of 'obd_memory' failed\n");
 565                 RETURN(-ENOMEM);
 566         }
 567
 568         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 569                              LPROCFS_CNTR_AVGMINMAX,
 570                              "memused", "bytes");
 571         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 572                              LPROCFS_CNTR_AVGMINMAX,
 573                              "pagesused", "pages");
 574 #endif
 575         err = obd_init_checks();
 576         if (err == -EOVERFLOW)
 577                 return err;
 578
 579         class_init_uuidlist();
 580         err = class_handle_init();
 581         if (err)
 582                 return err;
 583
 584         CFS_INIT_LIST_HEAD(&obd_types);
 585
 586         err = misc_register(&obd_psdev);
 587         if (err) {
 588                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 589                 return err;
 590         }
 591
 592         /* This struct is already zeroed for us (static global) */
 593         for (i = 0; i < class_devno_max(); i++)
 594                 obd_devs[i] = NULL;
 595
 596         /* Default the dirty page cache cap to 1/2 of system memory.
 597          * For clients with less memory, a larger fraction is needed
 598          * for other purposes (mostly for BGL). */
 599         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 600                 obd_max_dirty_pages = totalram_pages / 4;
 601         else
 602                 obd_max_dirty_pages = totalram_pages / 2;
 603
 604         err = obd_init_caches();
 605         if (err)
 606                 return err;
 607 #ifdef __KERNEL__
 608         err = class_procfs_init();
 609         if (err)
 610                 return err;
 611 #endif
 612
 613         err = lu_global_init();
 614         if (err)
 615                 return err;
 616
 617         err = lu_capainfo_init();
 618         if (err)
 619                 return err;
 620
 621         err = cl_global_init();
 622         if (err != 0)
 623                 return err;
 624
 625 #if defined(__KERNEL__) && defined(HAVE_SERVER_SUPPORT)
 626         err = dt_global_init();
 627         if (err != 0)
 628                 return err;
 629
 630         err = lu_ucred_global_init();
 631         if (err != 0)
 632                 return err;
 633 #endif
 634
 635         err = llog_info_init();
 636         if (err)
 637                 return err;
 638
 639 #ifdef __KERNEL__
 640         err = lustre_register_fs();
 641 #endif
 642
 643         return err;
 644 }
 645
 646 void obd_update_maxusage(void)
 647 {
 648         __u64 max1, max2;
 649
 650         max1 = obd_pages_sum();
 651         max2 = obd_memory_sum();
 652
 653         spin_lock(&obd_updatemax_lock);
 654         if (max1 > obd_max_pages)
 655                 obd_max_pages = max1;
 656         if (max2 > obd_max_alloc)
 657                 obd_max_alloc = max2;
 658         spin_unlock(&obd_updatemax_lock);
 659 }
 660 EXPORT_SYMBOL(obd_update_maxusage);
 661
 662 #ifdef LPROCFS
 663 __u64 obd_memory_max(void)
 664 {
 665         __u64 ret;
 666
 667         spin_lock(&obd_updatemax_lock);
 668         ret = obd_max_alloc;
 669         spin_unlock(&obd_updatemax_lock);
 670
 671         return ret;
 672 }
 673 EXPORT_SYMBOL(obd_memory_max);
 674
 675 __u64 obd_pages_max(void)
 676 {
 677         __u64 ret;
 678
 679         spin_lock(&obd_updatemax_lock);
 680         ret = obd_max_pages;
 681         spin_unlock(&obd_updatemax_lock);
 682
 683         return ret;
 684 }
 685 EXPORT_SYMBOL(obd_pages_max);
 686 #endif
 687
 688 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 689  * ifdef to the end of the file to cover module and versioning goo.*/
 690 #ifdef __KERNEL__
 691 static void cleanup_obdclass(void)
 692 {
 693         int i;
 694         int lustre_unregister_fs(void);
 695         __u64 memory_leaked, pages_leaked;
 696         __u64 memory_max, pages_max;
 697         ENTRY;
 698
 699         lustre_unregister_fs();
 700
 701         misc_deregister(&obd_psdev);
 702         for (i = 0; i < class_devno_max(); i++) {
 703                 struct obd_device *obd = class_num2obd(i);
 704                 if (obd && obd->obd_set_up &&
 705                     OBT(obd) && OBP(obd, detach)) {
 706                         /* XXX should this call generic detach otherwise? */
 707                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 708                         OBP(obd, detach)(obd);
 709                 }
 710         }
 711         llog_info_fini();
 712 #ifdef HAVE_SERVER_SUPPORT
 713         lu_ucred_global_fini();
 714         dt_global_fini();
 715 #endif
 716         cl_global_fini();
 717         lu_capainfo_fini();
 718         lu_global_fini();
 719
 720         obd_cleanup_caches();
 721         obd_sysctl_clean();
 722
 723         class_procfs_clean();
 724
 725         class_handle_cleanup();
 726         class_exit_uuidlist();
 727         obd_zombie_impexp_stop();
 728
 729         memory_leaked = obd_memory_sum();
 730         pages_leaked = obd_pages_sum();
 731
 732         memory_max = obd_memory_max();
 733         pages_max = obd_pages_max();
 734
 735         lprocfs_free_stats(&obd_memory);
 736         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 737                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 738                memory_max, memory_leaked);
 739         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 740                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 741                pages_max, pages_leaked);
 742
 743         EXIT;
 744 }
 745
 746 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 747 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 748 MODULE_LICENSE("GPL");
 749
 750 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 751 #endif