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  * Object Devices Class Driver
   5  *
   6  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * These are the only exported functions, they provide some generic
  24  * infrastructure for managing object devices
  25  */
  26
  27 #define DEBUG_SUBSYSTEM S_CLASS
  28 #ifndef EXPORT_SYMTAB
  29 # define EXPORT_SYMTAB
  30 #endif
  31 #ifdef __KERNEL__
  32 #include <linux/config.h> /* for CONFIG_PROC_FS */
  33 #include <linux/module.h>
  34 #include <linux/errno.h>
  35 #include <linux/kernel.h>
  36 #include <linux/major.h>
  37 #include <linux/sched.h>
  38 #include <linux/lp.h>
  39 #include <linux/slab.h>
  40 #include <linux/ioport.h>
  41 #include <linux/fcntl.h>
  42 #include <linux/delay.h>
  43 #include <linux/skbuff.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/fs.h>
  46 #include <linux/poll.h>
  47 #include <linux/init.h>
  48 #include <linux/list.h>
  49 #include <linux/highmem.h>
  50 #include <asm/io.h>
  51 #include <asm/ioctls.h>
  52 #include <asm/system.h>
  53 #include <asm/poll.h>
  54 #include <asm/uaccess.h>
  55 #include <linux/miscdevice.h>
  56 #include <linux/smp_lock.h>
  57 #include <linux/seq_file.h>
  58 #else
  59 # include <liblustre.h>
  60 #endif
  61
  62 #include <linux/obd_support.h>
  63 #include <linux/obd_class.h>
  64 #include <linux/lustre_debug.h>
  65 #include <linux/lprocfs_status.h>
  66 #include <linux/lustre_build_version.h>
  67 #include <portals/list.h>
  68 #include "llog_internal.h"
  69
  70 struct semaphore obd_conf_sem;   /* serialize configuration commands */
  71 struct obd_device obd_dev[MAX_OBD_DEVICES];
  72 struct list_head obd_types;
  73 #ifndef __KERNEL__
  74 atomic_t obd_memory;
  75 int obd_memmax;
  76 #endif
  77
  78 int proc_version;
  79
  80 /* The following are visible and mutable through /proc/sys/lustre/. */
  81 unsigned int obd_fail_loc;
  82 unsigned int obd_timeout = 100;
  83 char obd_lustre_upcall[128] = "/usr/lib/lustre/lustre_upcall";
  84 unsigned int obd_sync_filter; /* = 0, don't sync by default */
  85
  86 #ifdef __KERNEL__
  87 /*  opening /dev/obd */
  88 static int obd_class_open(struct inode * inode, struct file * file)
  89 {
  90         ENTRY;
  91
  92         PORTAL_MODULE_USE;
  93         RETURN(0);
  94 }
  95
  96 /*  closing /dev/obd */
  97 static int obd_class_release(struct inode * inode, struct file * file)
  98 {
  99         ENTRY;
 100
 101         PORTAL_MODULE_UNUSE;
 102         RETURN(0);
 103 }
 104 #endif
 105
 106 static inline void obd_data2conn(struct lustre_handle *conn,
 107                                  struct obd_ioctl_data *data)
 108 {
 109         memset(conn, 0, sizeof *conn);
 110         conn->cookie = data->ioc_cookie;
 111 }
 112
 113 static inline void obd_conn2data(struct obd_ioctl_data *data,
 114                                  struct lustre_handle *conn)
 115 {
 116         data->ioc_cookie = conn->cookie;
 117 }
 118
 119 int class_resolve_dev_name(uint32_t len, char *name)
 120 {
 121         int rc;
 122         int dev;
 123
 124         if (!len || !name) {
 125                 CERROR("No name passed,!\n");
 126                 GOTO(out, rc = -EINVAL);
 127         }
 128         if (name[len - 1] != 0) {
 129                 CERROR("Name not nul terminated!\n");
 130                 GOTO(out, rc = -EINVAL);
 131         }
 132
 133         CDEBUG(D_IOCTL, "device name %s\n", name);
 134         dev = class_name2dev(name);
 135         if (dev == -1) {
 136                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 137                 GOTO(out, rc = -EINVAL);
 138         }
 139
 140         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 141         rc = dev;
 142
 143 out:
 144         RETURN(rc);
 145 }
 146
 147 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 148 {
 149         char *buf = NULL;
 150         struct obd_ioctl_data *data;
 151         struct portals_debug_ioctl_data *debug_data;
 152         struct obd_device *obd = NULL;
 153         int err = 0, len = 0, serialised = 0;
 154         ENTRY;
 155
 156         if (current->fsuid != 0)
 157                 RETURN(err = -EACCES);
 158
 159         if ((cmd & 0xffffff00) == ((int)'T') << 8) /* ignore all tty ioctls */
 160                 RETURN(err = -ENOTTY);
 161
 162         /* only for debugging */
 163         if (cmd == PTL_IOC_DEBUG_MASK) {
 164                 debug_data = (struct portals_debug_ioctl_data*)arg;
 165                 portal_subsystem_debug = debug_data->subs;
 166                 portal_debug = debug_data->debug;
 167                 return 0;
 168         }
 169
 170         switch (cmd) {
 171         case OBD_IOC_BRW_WRITE:
 172         case OBD_IOC_BRW_READ:
 173         case OBD_IOC_GETATTR:
 174         case ECHO_IOC_ENQUEUE:
 175         case ECHO_IOC_CANCEL:
 176         case OBD_IOC_CLIENT_RECOVER:
 177         case OBD_IOC_CATLOGLIST:
 178         case OBD_IOC_LLOG_INFO:
 179         case OBD_IOC_LLOG_PRINT:
 180         case OBD_IOC_LLOG_CANCEL:
 181         case OBD_IOC_LLOG_CHECK:
 182         case OBD_IOC_LLOG_REMOVE:
 183                 break;
 184         default:
 185                 down(&obd_conf_sem);
 186                 serialised = 1;
 187                 break;
 188         }
 189
 190         CDEBUG(D_IOCTL, "cmd = %x, obd = %p\n", cmd, obd);
 191         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 192                 CERROR("OBD ioctl: data error\n");
 193                 GOTO(out, err = -EINVAL);
 194         }
 195         data = (struct obd_ioctl_data *)buf;
 196
 197         switch (cmd) {
 198         case OBD_IOC_PROCESS_CFG: {
 199                 char *buf;
 200                 struct lustre_cfg *lcfg;
 201
 202                 /* FIXME hack to liblustre dump, remove when switch
 203                    to zeroconf */
 204 #ifndef __KERNEL__
 205                 data->ioc_pbuf1 = data->ioc_inlbuf1;
 206                 data->ioc_plen1 = data->ioc_inllen1;
 207 #endif
 208                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 209                         CERROR("No config buffer passed!\n");
 210                         GOTO(out, err = -EINVAL);
 211                 }
 212                 err = lustre_cfg_getdata(&buf, data->ioc_plen1,
 213                                          data->ioc_pbuf1, 0);
 214                 if (err)
 215                         GOTO(out, err);
 216                 lcfg = (struct lustre_cfg* ) buf;
 217
 218                 err = class_process_config(lcfg);
 219                 lustre_cfg_freedata(buf, data->ioc_plen1);
 220                 GOTO(out, err);
 221         }
 222
 223         case OBD_IOC_LIST: {
 224                 int i;
 225                 char *buf2 = data->ioc_bulk;
 226                 int remains = data->ioc_inllen1;
 227
 228                 if (!data->ioc_inlbuf1) {
 229                         CERROR("No buffer passed!\n");
 230                         GOTO(out, err = -EINVAL);
 231                 }
 232
 233
 234                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 235                         int l;
 236                         char *status;
 237                         struct obd_device *obd = &obd_dev[i];
 238
 239                         if (!obd->obd_type)
 240                                 continue;
 241                         if (obd->obd_stopping)
 242                                 status = "ST";
 243                         else if (obd->obd_set_up)
 244                                 status = "UP";
 245                         else if (obd->obd_attached)
 246                                 status = "AT";
 247                         else
 248                                 status = "-";
 249                         l = snprintf(buf2, remains, "%2d %s %s %s %s %d\n",
 250                                      i, status, obd->obd_type->typ_name,
 251                                      obd->obd_name, obd->obd_uuid.uuid,
 252                                      obd->obd_type->typ_refcnt);
 253                         buf2 +=l;
 254                         remains -=l;
 255                         if (remains <= 0) {
 256                                 CERROR("not enough space for device listing\n");
 257                                 break;
 258                         }
 259                 }
 260
 261                 err = copy_to_user((void *)arg, data, len);
 262                 if (err)
 263                         err = -EFAULT;
 264                 GOTO(out, err);
 265         }
 266
 267         case OBD_GET_VERSION:
 268                 if (!data->ioc_inlbuf1) {
 269                         CERROR("No buffer passed in ioctl\n");
 270                         GOTO(out, err = -EINVAL);
 271                 }
 272
 273                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 274                         CERROR("ioctl buffer too small to hold version\n");
 275                         GOTO(out, err = -EINVAL);
 276                 }
 277
 278                 memcpy(data->ioc_bulk, BUILD_VERSION,
 279                        strlen(BUILD_VERSION) + 1);
 280
 281                 err = copy_to_user((void *)arg, data, len);
 282                 if (err)
 283                         err = -EFAULT;
 284                 GOTO(out, err);
 285
 286         case OBD_IOC_NAME2DEV: {
 287                 /* Resolve a device name.  This does not change the
 288                  * currently selected device.
 289                  */
 290                 int dev;
 291
 292                 dev = class_resolve_dev_name(data->ioc_inllen1,
 293                                              data->ioc_inlbuf1);
 294                 data->ioc_dev = dev;
 295                 if (dev < 0)
 296                         GOTO(out, err = -EINVAL);
 297
 298                 err = copy_to_user((void *)arg, data, sizeof(*data));
 299                 if (err)
 300                         err = -EFAULT;
 301                 GOTO(out, err);
 302         }
 303
 304         case OBD_IOC_UUID2DEV: {
 305                 /* Resolve a device uuid.  This does not change the
 306                  * currently selected device.
 307                  */
 308                 int dev;
 309                 struct obd_uuid uuid;
 310
 311                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 312                         CERROR("No UUID passed!\n");
 313                         GOTO(out, err = -EINVAL);
 314                 }
 315                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 316                         CERROR("UUID not NUL terminated!\n");
 317                         GOTO(out, err = -EINVAL);
 318                 }
 319
 320                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 321                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 322                 dev = class_uuid2dev(&uuid);
 323                 data->ioc_dev = dev;
 324                 if (dev == -1) {
 325                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 326                                data->ioc_inlbuf1);
 327                         GOTO(out, err = -EINVAL);
 328                 }
 329
 330                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 331                        dev);
 332                 err = copy_to_user((void *)arg, data, sizeof(*data));
 333                 if (err)
 334                         err = -EFAULT;
 335                 GOTO(out, err);
 336         }
 337
 338
 339         case OBD_IOC_CLOSE_UUID: {
 340                 struct lustre_peer peer;
 341                 CDEBUG(D_IOCTL, "closing all connections to uuid %s\n",
 342                        data->ioc_inlbuf1);
 343                 lustre_uuid_to_peer(data->ioc_inlbuf1, &peer);
 344                 GOTO(out, err = 0);
 345         }
 346
 347         }
 348
 349         if (data->ioc_dev >= MAX_OBD_DEVICES) {
 350                 CERROR("OBD ioctl: No device\n");
 351                 GOTO(out, err = -EINVAL);
 352         }
 353         obd = &obd_dev[data->ioc_dev];
 354         if (!(obd && obd->obd_set_up) || obd->obd_stopping) {
 355                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 356                 GOTO(out, err = -EINVAL);
 357         }
 358
 359         switch(cmd) {
 360         case OBD_IOC_NO_TRANSNO: {
 361                 if (!obd->obd_attached) {
 362                         CERROR("Device %d not attached\n", obd->obd_minor);
 363                         GOTO(out, err = -ENODEV);
 364                 }
 365                 CDEBUG(D_IOCTL,
 366                        "disabling committed-transno notifications on %d\n",
 367                        obd->obd_minor);
 368                 obd->obd_no_transno = 1;
 369                 GOTO(out, err = 0);
 370         }
 371
 372         default: {
 373                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 374                 if (err)
 375                         GOTO(out, err);
 376
 377                 err = copy_to_user((void *)arg, data, len);
 378                 if (err)
 379                         err = -EFAULT;
 380                 GOTO(out, err);
 381         }
 382         }
 383
 384  out:
 385         if (buf)
 386                 obd_ioctl_freedata(buf, len);
 387         if (serialised)
 388                 up(&obd_conf_sem);
 389         RETURN(err);
 390 } /* class_handle_ioctl */
 391
 392
 393
 394 #define OBD_MINOR 241
 395 #ifdef __KERNEL__
 396 /* to control /dev/obd */
 397 static int obd_class_ioctl(struct inode *inode, struct file *filp,
 398                            unsigned int cmd, unsigned long arg)
 399 {
 400         return class_handle_ioctl(cmd, arg);
 401 }
 402
 403 /* declare character device */
 404 static struct file_operations obd_psdev_fops = {
 405         ioctl:   obd_class_ioctl,       /* ioctl */
 406         open:    obd_class_open,        /* open */
 407         release: obd_class_release,     /* release */
 408 };
 409
 410 /* modules setup */
 411 static struct miscdevice obd_psdev = {
 412         OBD_MINOR,
 413         "obd_psdev",
 414         &obd_psdev_fops
 415 };
 416 #else
 417 void *obd_psdev = NULL;
 418 #endif
 419
 420 EXPORT_SYMBOL(obd_dev);
 421 EXPORT_SYMBOL(obdo_cachep);
 422 EXPORT_SYMBOL(obd_fail_loc);
 423 EXPORT_SYMBOL(obd_timeout);
 424 EXPORT_SYMBOL(obd_lustre_upcall);
 425 EXPORT_SYMBOL(obd_sync_filter);
 426 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 427 EXPORT_SYMBOL(ptlrpc_abort_inflight_superhack);
 428 EXPORT_SYMBOL(proc_lustre_root);
 429
 430 EXPORT_SYMBOL(class_register_type);
 431 EXPORT_SYMBOL(class_unregister_type);
 432 EXPORT_SYMBOL(class_get_type);
 433 EXPORT_SYMBOL(class_put_type);
 434 EXPORT_SYMBOL(class_name2dev);
 435 EXPORT_SYMBOL(class_name2obd);
 436 EXPORT_SYMBOL(class_uuid2dev);
 437 EXPORT_SYMBOL(class_uuid2obd);
 438 EXPORT_SYMBOL(class_find_client_obd);
 439 EXPORT_SYMBOL(class_devices_in_group);
 440 EXPORT_SYMBOL(__class_export_put);
 441 EXPORT_SYMBOL(class_new_export);
 442 EXPORT_SYMBOL(class_unlink_export);
 443 EXPORT_SYMBOL(class_import_get);
 444 EXPORT_SYMBOL(class_import_put);
 445 EXPORT_SYMBOL(class_new_import);
 446 EXPORT_SYMBOL(class_destroy_import);
 447 EXPORT_SYMBOL(class_connect);
 448 EXPORT_SYMBOL(class_conn2export);
 449 EXPORT_SYMBOL(class_exp2obd);
 450 EXPORT_SYMBOL(class_conn2obd);
 451 EXPORT_SYMBOL(class_exp2cliimp);
 452 EXPORT_SYMBOL(class_conn2cliimp);
 453 EXPORT_SYMBOL(class_disconnect);
 454 EXPORT_SYMBOL(class_disconnect_exports);
 455
 456 EXPORT_SYMBOL(osic_init);
 457 EXPORT_SYMBOL(osic_release);
 458 EXPORT_SYMBOL(osic_add_one);
 459 EXPORT_SYMBOL(osic_wait);
 460 EXPORT_SYMBOL(osic_complete_one);
 461
 462 /* uuid.c */
 463 EXPORT_SYMBOL(class_uuid_unparse);
 464 EXPORT_SYMBOL(lustre_uuid_to_peer);
 465
 466 EXPORT_SYMBOL(class_handle_hash);
 467 EXPORT_SYMBOL(class_handle_unhash);
 468 EXPORT_SYMBOL(class_handle2object);
 469
 470 /* config.c */
 471 EXPORT_SYMBOL(class_get_profile);
 472 EXPORT_SYMBOL(class_del_profile);
 473 EXPORT_SYMBOL(class_process_config);
 474 EXPORT_SYMBOL(class_config_parse_llog);
 475 EXPORT_SYMBOL(class_config_dump_llog);
 476 EXPORT_SYMBOL(class_attach);
 477 EXPORT_SYMBOL(class_setup);
 478 EXPORT_SYMBOL(class_cleanup);
 479 EXPORT_SYMBOL(class_detach);
 480
 481 #ifdef LPROCFS
 482 int obd_proc_read_version(char *page, char **start, off_t off, int count,
 483                           int *eof, void *data)
 484 {
 485         *eof = 1;
 486         return snprintf(page, count, "%s\n", BUILD_VERSION);
 487 }
 488
 489 int obd_proc_read_pinger(char *page, char **start, off_t off, int count,
 490                          int *eof, void *data)
 491 {
 492         *eof = 1;
 493         return snprintf(page, count, "%s\n",
 494 #ifdef ENABLE_PINGER
 495                         "on"
 496 #else
 497                         "off"
 498 #endif
 499                        );
 500 }
 501
 502 /* Root for /proc/fs/lustre */
 503 struct proc_dir_entry *proc_lustre_root = NULL;
 504 struct lprocfs_vars lprocfs_base[] = {
 505         { "version", obd_proc_read_version, NULL, NULL },
 506         { "pinger", obd_proc_read_pinger, NULL, NULL },
 507         { 0 }
 508 };
 509
 510 static void *obd_device_list_seq_start(struct seq_file *p, loff_t*pos)
 511 {
 512         if (*pos >= MAX_OBD_DEVICES)
 513                 return NULL;
 514         return &obd_dev[*pos];
 515 }
 516
 517 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 518 {
 519 }
 520
 521 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 522 {
 523         ++*pos;
 524         if (*pos >= MAX_OBD_DEVICES)
 525                 return NULL;
 526         return &obd_dev[*pos];
 527 }
 528
 529 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 530 {
 531         struct obd_device *obd = (struct obd_device *)v;
 532         int index = obd - &obd_dev[0];
 533         char *status;
 534
 535         if (!obd->obd_type)
 536                 return 0;
 537         if (obd->obd_stopping)
 538                 status = "ST";
 539         else if (obd->obd_set_up)
 540                 status = "UP";
 541         else if (obd->obd_attached)
 542                 status = "AT";
 543         else
 544                 status = "--";
 545
 546         return seq_printf(p, "%3d %s %s %s %s %d\n",
 547                           (int)index, status, obd->obd_type->typ_name,
 548                           obd->obd_name, obd->obd_uuid.uuid,
 549                           atomic_read(&obd->obd_refcount));
 550 }
 551
 552 struct seq_operations obd_device_list_sops = {
 553         .start = obd_device_list_seq_start,
 554         .stop = obd_device_list_seq_stop,
 555         .next = obd_device_list_seq_next,
 556         .show = obd_device_list_seq_show,
 557 };
 558
 559 static int obd_device_list_open(struct inode *inode, struct file *file)
 560 {
 561         struct proc_dir_entry *dp = PDE(inode);
 562         struct seq_file *seq;
 563         int rc = seq_open(file, &obd_device_list_sops);
 564
 565         if (rc)
 566                 return rc;
 567
 568         seq = file->private_data;
 569         seq->private = dp->data;
 570
 571         return 0;
 572 }
 573
 574 struct file_operations obd_device_list_fops = {
 575         .open = obd_device_list_open,
 576         .read = seq_read,
 577         .llseek = seq_lseek,
 578         .release = seq_release,
 579 };
 580 #endif
 581
 582 #ifdef __KERNEL__
 583 static int __init init_obdclass(void)
 584 #else
 585 int init_obdclass(void)
 586 #endif
 587 {
 588         struct obd_device *obd;
 589 #ifdef LPROCFS
 590         struct proc_dir_entry *entry;
 591 #endif
 592         int err;
 593         int i;
 594
 595         printk(KERN_INFO "Lustre: OBD class driver Build Version: "
 596                BUILD_VERSION", info@clusterfs.com\n");
 597
 598         class_init_uuidlist();
 599         err = class_handle_init();
 600         if (err)
 601                 return err;
 602
 603         sema_init(&obd_conf_sem, 1);
 604         INIT_LIST_HEAD(&obd_types);
 605
 606         err = misc_register(&obd_psdev);
 607         if (err) {
 608                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 609                 return err;
 610         }
 611
 612         /* This struct is already zerod for us (static global) */
 613         for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
 614                 obd->obd_minor = i;
 615
 616         err = obd_init_caches();
 617         if (err)
 618                 return err;
 619
 620 #ifdef __KERNEL__
 621         obd_sysctl_init();
 622 #endif
 623
 624 #ifdef LPROCFS
 625         proc_lustre_root = proc_mkdir("lustre", proc_root_fs);
 626         if (!proc_lustre_root) {
 627                 printk(KERN_ERR
 628                        "LustreError: error registering /proc/fs/lustre\n");
 629                 RETURN(-ENOMEM);
 630         }
 631         proc_version = lprocfs_add_vars(proc_lustre_root, lprocfs_base, NULL);
 632         entry = create_proc_entry("devices", 0444, proc_lustre_root);
 633         if (entry == NULL) {
 634                 printk(KERN_ERR "LustreError: error registering "
 635                        "/proc/fs/lustre/devices\n");
 636                 lprocfs_remove(proc_lustre_root);
 637                 RETURN(-ENOMEM);
 638         }
 639         entry->proc_fops = &obd_device_list_fops;
 640 #endif
 641         return 0;
 642 }
 643
 644 #ifdef __KERNEL__
 645 static void /*__exit*/ cleanup_obdclass(void)
 646 #else
 647 static void cleanup_obdclass(void)
 648 #endif
 649 {
 650 #ifdef __KERNEL__
 651         int i;
 652 #else
 653         int i, leaked;
 654 #endif
 655         ENTRY;
 656
 657         misc_deregister(&obd_psdev);
 658         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 659                 struct obd_device *obd = &obd_dev[i];
 660                 if (obd->obd_type && obd->obd_set_up &&
 661                     OBT(obd) && OBP(obd, detach)) {
 662                         /* XXX should this call generic detach otherwise? */
 663                         OBP(obd, detach)(obd);
 664                 }
 665         }
 666
 667         obd_cleanup_caches();
 668 #ifdef __KERNEL__
 669         obd_sysctl_clean();
 670 #endif
 671 #ifdef LPROCFS
 672         if (proc_lustre_root) {
 673                 lprocfs_remove(proc_lustre_root);
 674                 proc_lustre_root = NULL;
 675         }
 676 #endif
 677
 678         class_handle_cleanup();
 679         class_exit_uuidlist();
 680
 681 #ifndef __KERNEL__
 682         leaked = atomic_read(&obd_memory);
 683         CDEBUG(leaked ? D_ERROR : D_INFO,
 684                "obd mem max: %d leaked: %d\n", obd_memmax, leaked);
 685 #endif
 686
 687         EXIT;
 688 }
 689
 690 /* Check that we're building against the appropriate version of the Lustre
 691  * kernel patch */
 692 #ifdef __KERNEL__
 693 #include <linux/lustre_version.h>
 694 #define LUSTRE_MIN_VERSION 28
 695 #define LUSTRE_MAX_VERSION 32
 696 #if (LUSTRE_KERNEL_VERSION < LUSTRE_MIN_VERSION)
 697 # error Cannot continue: Your Lustre kernel patch is older than the sources
 698 #elif (LUSTRE_KERNEL_VERSION > LUSTRE_MAX_VERSION)
 699 # error Cannot continue: Your Lustre sources are older than the kernel patch
 700 #endif
 701  #else
 702 # warning "Lib Lustre - no versioning information"
 703 #endif
 704
 705 #ifdef __KERNEL__
 706 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 707 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 708 MODULE_LICENSE("GPL");
 709
 710 module_init(init_obdclass);
 711 module_exit(cleanup_obdclass);
 712 #endif