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