lustre/obdclass/class_obd.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 EXPORT_SYMTAB
  39 # define EXPORT_SYMTAB
  40 #endif
  41 #ifndef __KERNEL__
  42 # include <liblustre.h>
  43 #else
  44 # include <asm/atomic.h>
  45 #endif
  46
  47 #include <obd_support.h>
  48 #include <obd_class.h>
  49 #include <lustre_debug.h>
  50 #include <lprocfs_status.h>
  51 #include <lustre/lustre_build_version.h>
  52 #include <libcfs/list.h>
  53 #include "llog_internal.h"
  54
  55 #ifndef __KERNEL__
  56 /* liblustre workaround */
  57 atomic_t libcfs_kmemory = {0};
  58 #endif
  59
  60 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  61 struct list_head obd_types;
  62 spinlock_t obd_dev_lock = SPIN_LOCK_UNLOCKED;
  63
  64 #ifndef __KERNEL__
  65 __u64 obd_max_pages = 0;
  66 __u64 obd_max_alloc = 0;
  67 __u64 obd_alloc;
  68 __u64 obd_pages;
  69 #endif
  70
  71 /* The following are visible and mutable through /proc/sys/lustre/. */
  72 unsigned int obd_debug_peer_on_timeout;
  73 unsigned int obd_dump_on_timeout;
  74 unsigned int obd_dump_on_eviction;
  75 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  76 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  77 unsigned int obd_max_dirty_pages = 256;
  78 atomic_t obd_dirty_pages;
  79
  80 cfs_waitq_t obd_race_waitq;
  81 int obd_race_state;
  82
  83 #ifdef __KERNEL__
  84 unsigned long obd_print_fail_loc(void)
  85 {
  86         CWARN("obd_fail_loc = %lx\n", obd_fail_loc);
  87         return obd_fail_loc;
  88 }
  89
  90 void obd_set_fail_loc(unsigned int fl)
  91 {
  92         obd_fail_loc = fl;
  93 }
  94
  95 /*  opening /dev/obd */
  96 static int obd_class_open(unsigned long flags, void *args)
  97 {
  98         ENTRY;
  99
 100         PORTAL_MODULE_USE;
 101         RETURN(0);
 102 }
 103
 104 /*  closing /dev/obd */
 105 static int obd_class_release(unsigned long flags, void *args)
 106 {
 107         ENTRY;
 108
 109         PORTAL_MODULE_UNUSE;
 110         RETURN(0);
 111 }
 112 #endif
 113
 114 static inline void obd_data2conn(struct lustre_handle *conn,
 115                                  struct obd_ioctl_data *data)
 116 {
 117         memset(conn, 0, sizeof *conn);
 118         conn->cookie = data->ioc_cookie;
 119 }
 120
 121 static inline void obd_conn2data(struct obd_ioctl_data *data,
 122                                  struct lustre_handle *conn)
 123 {
 124         data->ioc_cookie = conn->cookie;
 125 }
 126
 127 int class_resolve_dev_name(__u32 len, const char *name)
 128 {
 129         int rc;
 130         int dev;
 131
 132         ENTRY;
 133         if (!len || !name) {
 134                 CERROR("No name passed,!\n");
 135                 GOTO(out, rc = -EINVAL);
 136         }
 137         if (name[len - 1] != 0) {
 138                 CERROR("Name not nul terminated!\n");
 139                 GOTO(out, rc = -EINVAL);
 140         }
 141
 142         CDEBUG(D_IOCTL, "device name %s\n", name);
 143         dev = class_name2dev(name);
 144         if (dev == -1) {
 145                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 146                 GOTO(out, rc = -EINVAL);
 147         }
 148
 149         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 150         rc = dev;
 151
 152 out:
 153         RETURN(rc);
 154 }
 155
 156 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 157 {
 158         char *buf = NULL;
 159         struct obd_ioctl_data *data;
 160         struct libcfs_debug_ioctl_data *debug_data;
 161         struct obd_device *obd = NULL;
 162         int err = 0, len = 0;
 163         ENTRY;
 164
 165         /* only for debugging */
 166         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 167                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 168                 libcfs_subsystem_debug = debug_data->subs;
 169                 libcfs_debug = debug_data->debug;
 170                 return 0;
 171         }
 172
 173         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 174         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 175                 CERROR("OBD ioctl: data error\n");
 176                 GOTO(out, err = -EINVAL);
 177         }
 178         data = (struct obd_ioctl_data *)buf;
 179
 180         switch (cmd) {
 181         case OBD_IOC_PROCESS_CFG: {
 182                 struct lustre_cfg *lcfg;
 183
 184                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 185                         CERROR("No config buffer passed!\n");
 186                         GOTO(out, err = -EINVAL);
 187                 }
 188                 OBD_ALLOC(lcfg, data->ioc_plen1);
 189                 if (lcfg == NULL)
 190                         GOTO(out, err = -ENOMEM);
 191                 err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1);
 192                 if (!err)
 193                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 194                 if (!err)
 195                         err = class_process_config(lcfg);
 196
 197                 OBD_FREE(lcfg, data->ioc_plen1);
 198                 GOTO(out, err);
 199         }
 200
 201         case OBD_GET_VERSION:
 202                 if (!data->ioc_inlbuf1) {
 203                         CERROR("No buffer passed in ioctl\n");
 204                         GOTO(out, err = -EINVAL);
 205                 }
 206
 207                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 208                         CERROR("ioctl buffer too small to hold version\n");
 209                         GOTO(out, err = -EINVAL);
 210                 }
 211
 212                 memcpy(data->ioc_bulk, BUILD_VERSION,
 213                        strlen(BUILD_VERSION) + 1);
 214
 215                 err = obd_ioctl_popdata((void *)arg, data, len);
 216                 if (err)
 217                         err = -EFAULT;
 218                 GOTO(out, err);
 219
 220         case OBD_IOC_NAME2DEV: {
 221                 /* Resolve a device name.  This does not change the
 222                  * currently selected device.
 223                  */
 224                 int dev;
 225
 226                 dev = class_resolve_dev_name(data->ioc_inllen1,
 227                                              data->ioc_inlbuf1);
 228                 data->ioc_dev = dev;
 229                 if (dev < 0)
 230                         GOTO(out, err = -EINVAL);
 231
 232                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 233                 if (err)
 234                         err = -EFAULT;
 235                 GOTO(out, err);
 236         }
 237
 238         case OBD_IOC_UUID2DEV: {
 239                 /* Resolve a device uuid.  This does not change the
 240                  * currently selected device.
 241                  */
 242                 int dev;
 243                 struct obd_uuid uuid;
 244
 245                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 246                         CERROR("No UUID passed!\n");
 247                         GOTO(out, err = -EINVAL);
 248                 }
 249                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 250                         CERROR("UUID not NUL terminated!\n");
 251                         GOTO(out, err = -EINVAL);
 252                 }
 253
 254                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 255                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 256                 dev = class_uuid2dev(&uuid);
 257                 data->ioc_dev = dev;
 258                 if (dev == -1) {
 259                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 260                                data->ioc_inlbuf1);
 261                         GOTO(out, err = -EINVAL);
 262                 }
 263
 264                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 265                        dev);
 266                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 267                 if (err)
 268                         err = -EFAULT;
 269                 GOTO(out, err);
 270         }
 271
 272         case OBD_IOC_CLOSE_UUID: {
 273                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 274                        data->ioc_inlbuf1);
 275                 GOTO(out, err = 0);
 276         }
 277
 278         case OBD_IOC_GETDEVICE: {
 279                 int     index = data->ioc_count;
 280                 char    *status, *str;
 281
 282                 if (!data->ioc_inlbuf1) {
 283                         CERROR("No buffer passed in ioctl\n");
 284                         GOTO(out, err = -EINVAL);
 285                 }
 286                 if (data->ioc_inllen1 < 128) {
 287                         CERROR("ioctl buffer too small to hold version\n");
 288                         GOTO(out, err = -EINVAL);
 289                 }
 290
 291                 obd = class_num2obd(index);
 292                 if (!obd)
 293                         GOTO(out, err = -ENOENT);
 294
 295                 if (obd->obd_stopping)
 296                         status = "ST";
 297                 else if (obd->obd_set_up)
 298                         status = "UP";
 299                 else if (obd->obd_attached)
 300                         status = "AT";
 301                 else
 302                         status = "--";
 303                 str = (char *)data->ioc_bulk;
 304                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 305                          (int)index, status, obd->obd_type->typ_name,
 306                          obd->obd_name, obd->obd_uuid.uuid,
 307                          atomic_read(&obd->obd_refcount));
 308                 err = obd_ioctl_popdata((void *)arg, data, len);
 309
 310                 GOTO(out, err = 0);
 311         }
 312
 313         }
 314
 315         if (data->ioc_dev >= class_devno_max()) {
 316                 CERROR("OBD ioctl: No device\n");
 317                 GOTO(out, err = -EINVAL);
 318         }
 319
 320         obd = class_num2obd(data->ioc_dev);
 321         if (obd == NULL) {
 322                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 323                 GOTO(out, err = -EINVAL);
 324         }
 325         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 326
 327         if (!obd->obd_set_up || obd->obd_stopping) {
 328                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 329                 GOTO(out, err = -EINVAL);
 330         }
 331
 332         switch(cmd) {
 333         case OBD_IOC_NO_TRANSNO: {
 334                 if (!obd->obd_attached) {
 335                         CERROR("Device %d not attached\n", obd->obd_minor);
 336                         GOTO(out, err = -ENODEV);
 337                 }
 338                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 339                        obd->obd_name);
 340                 obd->obd_no_transno = 1;
 341                 GOTO(out, err = 0);
 342         }
 343
 344         default: {
 345                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 346                 if (err)
 347                         GOTO(out, err);
 348
 349                 err = obd_ioctl_popdata((void *)arg, data, len);
 350                 if (err)
 351                         err = -EFAULT;
 352                 GOTO(out, err);
 353         }
 354         }
 355
 356  out:
 357         if (buf)
 358                 obd_ioctl_freedata(buf, len);
 359         RETURN(err);
 360 } /* class_handle_ioctl */
 361
 362
 363
 364 #define OBD_MINOR 241
 365 #ifdef __KERNEL__
 366 /* to control /dev/obd */
 367 static int obd_class_ioctl (struct cfs_psdev_file *pfile, unsigned long cmd,
 368                             void *arg)
 369 {
 370         return class_handle_ioctl(cmd, (unsigned long)arg);
 371 }
 372
 373 /* declare character device */
 374 struct cfs_psdev_ops obd_psdev_ops = {
 375         /* .p_open    = */ obd_class_open,      /* open */
 376         /* .p_close   = */ obd_class_release,   /* release */
 377         /* .p_read    = */ NULL,
 378         /* .p_write   = */ NULL,
 379         /* .p_ioctl   = */ obd_class_ioctl     /* ioctl */
 380 };
 381
 382 extern cfs_psdev_t obd_psdev;
 383 #else
 384 void *obd_psdev = NULL;
 385 #endif
 386
 387 EXPORT_SYMBOL(obd_devs);
 388 EXPORT_SYMBOL(obd_print_fail_loc);
 389 EXPORT_SYMBOL(obd_race_waitq);
 390 EXPORT_SYMBOL(obd_race_state);
 391 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 392 EXPORT_SYMBOL(obd_dump_on_timeout);
 393 EXPORT_SYMBOL(obd_dump_on_eviction);
 394 EXPORT_SYMBOL(obd_timeout);
 395 EXPORT_SYMBOL(ldlm_timeout);
 396 EXPORT_SYMBOL(obd_max_dirty_pages);
 397 EXPORT_SYMBOL(obd_dirty_pages);
 398 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 399
 400 EXPORT_SYMBOL(proc_lustre_root);
 401
 402 EXPORT_SYMBOL(class_register_type);
 403 EXPORT_SYMBOL(class_unregister_type);
 404 EXPORT_SYMBOL(class_get_type);
 405 EXPORT_SYMBOL(class_put_type);
 406 EXPORT_SYMBOL(class_name2dev);
 407 EXPORT_SYMBOL(class_name2obd);
 408 EXPORT_SYMBOL(class_uuid2dev);
 409 EXPORT_SYMBOL(class_uuid2obd);
 410 EXPORT_SYMBOL(class_find_client_obd);
 411 EXPORT_SYMBOL(class_find_client_notype);
 412 EXPORT_SYMBOL(class_devices_in_group);
 413 EXPORT_SYMBOL(class_conn2export);
 414 EXPORT_SYMBOL(class_exp2obd);
 415 EXPORT_SYMBOL(class_conn2obd);
 416 EXPORT_SYMBOL(class_exp2cliimp);
 417 EXPORT_SYMBOL(class_conn2cliimp);
 418 EXPORT_SYMBOL(class_disconnect);
 419 EXPORT_SYMBOL(class_num2obd);
 420
 421 /* uuid.c */
 422 EXPORT_SYMBOL(class_uuid_unparse);
 423 EXPORT_SYMBOL(lustre_uuid_to_peer);
 424
 425 EXPORT_SYMBOL(class_handle_hash);
 426 EXPORT_SYMBOL(class_handle_unhash);
 427 EXPORT_SYMBOL(class_handle_hash_back);
 428 EXPORT_SYMBOL(class_handle2object);
 429 EXPORT_SYMBOL(class_handle_free_cb);
 430
 431 /* obd_config.c */
 432 EXPORT_SYMBOL(class_incref);
 433 EXPORT_SYMBOL(class_decref);
 434 EXPORT_SYMBOL(class_get_profile);
 435 EXPORT_SYMBOL(class_del_profile);
 436 EXPORT_SYMBOL(class_del_profiles);
 437 EXPORT_SYMBOL(class_process_config);
 438 EXPORT_SYMBOL(class_process_proc_param);
 439 EXPORT_SYMBOL(class_config_parse_llog);
 440 EXPORT_SYMBOL(class_config_dump_llog);
 441 EXPORT_SYMBOL(class_attach);
 442 EXPORT_SYMBOL(class_setup);
 443 EXPORT_SYMBOL(class_cleanup);
 444 EXPORT_SYMBOL(class_detach);
 445 EXPORT_SYMBOL(class_manual_cleanup);
 446
 447 /* mea.c */
 448 EXPORT_SYMBOL(mea_name2idx);
 449 EXPORT_SYMBOL(raw_name2idx);
 450
 451 #define OBD_INIT_CHECK
 452 #ifdef OBD_INIT_CHECK
 453 int obd_init_checks(void)
 454 {
 455         __u64 u64val, div64val;
 456         char buf[64];
 457         int len, ret = 0;
 458
 459         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s, LPSZ=%s, LPSSZ=%s\n",
 460                LPU64, LPD64, LPX64, LPSZ, LPSSZ);
 461
 462         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 463
 464         u64val = 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 = -EINVAL;
 470         }
 471         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 472         if (len != 18) {
 473                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 474                 ret = -EINVAL;
 475         }
 476
 477         div64val = OBD_OBJECT_EOF;
 478         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 479         if (u64val != OBD_OBJECT_EOF) {
 480                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 481                        u64val, (int)sizeof(u64val));
 482                 ret = -EOVERFLOW;
 483         }
 484         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 485                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 486                        u64val, (int)sizeof(u64val));
 487                 return -EOVERFLOW;
 488         }
 489         if (do_div(div64val, 256) != (u64val & 255)) {
 490                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 491                 return -EOVERFLOW;
 492         }
 493         if (u64val >> 8 != div64val) {
 494                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 495                        u64val, div64val, u64val >> 8);
 496                 return -EOVERFLOW;
 497         }
 498         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 499         if (len != 18) {
 500                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 501                 ret = -EINVAL;
 502         }
 503         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 504         if (len != 20) {
 505                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 506                 ret = -EINVAL;
 507         }
 508         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 509         if (len != 2) {
 510                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 511                 ret = -EINVAL;
 512         }
 513         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 514                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 515                       (__u64)CFS_PAGE_SIZE);
 516                 ret = -EINVAL;
 517         }
 518
 519         return ret;
 520 }
 521 #else
 522 #define obd_init_checks() do {} while(0)
 523 #endif
 524
 525 extern spinlock_t obd_types_lock;
 526 extern int class_procfs_init(void);
 527 extern int class_procfs_clean(void);
 528
 529 #ifdef __KERNEL__
 530 static int __init init_obdclass(void)
 531 #else
 532 int init_obdclass(void)
 533 #endif
 534 {
 535         int i, err;
 536 #ifdef __KERNEL__
 537         int lustre_register_fs(void);
 538
 539         printk(KERN_INFO "Lustre: OBD class driver, info@clusterfs.com\n");
 540         printk(KERN_INFO "        Lustre Version: "LUSTRE_VERSION_STRING"\n");
 541         printk(KERN_INFO "        Build Version: "BUILD_VERSION"\n");
 542
 543         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 544                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 545 #else
 546         CDEBUG(D_INFO, "Lustre: OBD class driver, info@clusterfs.com\n");
 547         CDEBUG(D_INFO, "        Lustre Version: "LUSTRE_VERSION_STRING"\n");
 548         CDEBUG(D_INFO, "        Build Version: "BUILD_VERSION"\n");
 549 #endif
 550
 551         spin_lock_init(&obd_types_lock);
 552         cfs_waitq_init(&obd_race_waitq);
 553         obd_zombie_impexp_init();
 554 #ifdef LPROCFS
 555         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 556                                          LPROCFS_STATS_FLAG_PERCPU);
 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         spin_lock_init(&obd_dev_lock);
 579         CFS_INIT_LIST_HEAD(&obd_types);
 580
 581         err = cfs_psdev_register(&obd_psdev);
 582         if (err) {
 583                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 584                 return err;
 585         }
 586
 587         /* This struct is already zerod for us (static global) */
 588         for (i = 0; i < class_devno_max(); i++)
 589                 obd_devs[i] = NULL;
 590
 591         /* Default the dirty page cache cap to 1/2 of system memory.
 592          * For clients with less memory, a larger fraction is needed
 593          * for other purposes (mostly for BGL). */
 594         if (num_physpages <= 512 << (20 - CFS_PAGE_SHIFT))
 595                 obd_max_dirty_pages = num_physpages / 4;
 596         else
 597                 obd_max_dirty_pages = num_physpages / 2;
 598
 599         err = obd_init_caches();
 600         if (err)
 601                 return err;
 602 #ifdef __KERNEL__
 603         err = lu_global_init();
 604         if (err)
 605                 return err;
 606         err = class_procfs_init();
 607         if (err)
 608                 return err;
 609         err = lustre_register_fs();
 610 #endif
 611
 612         return err;
 613 }
 614
 615 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 616  * ifdef to the end of the file to cover module and versioning goo.*/
 617 #ifdef __KERNEL__
 618 static void cleanup_obdclass(void)
 619 {
 620         int i;
 621         int lustre_unregister_fs(void);
 622         __u64 memory_leaked, pages_leaked;
 623         __u64 memory_max, pages_max;
 624         ENTRY;
 625
 626         lustre_unregister_fs();
 627
 628         cfs_psdev_deregister(&obd_psdev);
 629         for (i = 0; i < class_devno_max(); i++) {
 630                 struct obd_device *obd = class_num2obd(i);
 631                 if (obd && obd->obd_set_up &&
 632                     OBT(obd) && OBP(obd, detach)) {
 633                         /* XXX should this call generic detach otherwise? */
 634                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 635                         OBP(obd, detach)(obd);
 636                 }
 637         }
 638         lu_global_fini();
 639
 640         obd_cleanup_caches();
 641         obd_sysctl_clean();
 642
 643         class_procfs_clean();
 644
 645         class_handle_cleanup();
 646         class_exit_uuidlist();
 647         obd_zombie_impexp_stop();
 648
 649         memory_leaked = obd_memory_sum();
 650         pages_leaked = obd_pages_sum();
 651
 652         memory_max = obd_memory_max();
 653         pages_max = obd_pages_max();
 654
 655         lprocfs_free_stats(&obd_memory);
 656         if (memory_leaked > 0) {
 657                 CWARN("Memory leaks detected (max "LPU64", leaked "LPD64")\n",
 658                       memory_max, memory_leaked);
 659         }
 660         if (pages_leaked > 0) {
 661                 CWARN("Page leaks detected (max "LPU64", leaked "LPU64")\n",
 662                       pages_max, pages_leaked);
 663         }
 664
 665         EXIT;
 666 }
 667
 668 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 669 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 670 MODULE_LICENSE("GPL");
 671
 672 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 673 #endif