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  * Copyright (C) 2001  Cluster File Systems, Inc.
   5  *
   6  * This code is issued under the GNU General Public License.
   7  * See the file COPYING in this distribution
   8  *
   9  * These are the only exported functions, they provide some generic
  10  * infrastructure for managing object devices
  11  *
  12  * Object Devices Class Driver
  13  *              Copyright (C) 2002 Cluster File Systems, Inc.
  14  */
  15
  16 #define EXPORT_SYMTAB
  17 #include <linux/config.h> /* for CONFIG_PROC_FS */
  18 #include <linux/module.h>
  19 #include <linux/errno.h>
  20 #include <linux/kernel.h>
  21 #include <linux/major.h>
  22 #include <linux/kmod.h>   /* for request_module() */
  23 #include <linux/sched.h>
  24 #include <linux/lp.h>
  25 #include <linux/slab.h>
  26 #include <linux/ioport.h>
  27 #include <linux/fcntl.h>
  28 #include <linux/delay.h>
  29 #include <linux/skbuff.h>
  30 #include <linux/proc_fs.h>
  31 #include <linux/fs.h>
  32 #include <linux/poll.h>
  33 #include <linux/init.h>
  34 #include <linux/list.h>
  35 #include <asm/io.h>
  36 #include <asm/system.h>
  37 #include <asm/poll.h>
  38 #include <asm/uaccess.h>
  39 #include <linux/miscdevice.h>
  40
  41 #define DEBUG_SUBSYSTEM S_CLASS
  42
  43 #include <linux/obd_support.h>
  44 #include <linux/obd_class.h>
  45 #include <linux/smp_lock.h>
  46
  47 struct semaphore obd_conf_sem;   /* serialize configuration commands */
  48 struct obd_device obd_dev[MAX_OBD_DEVICES];
  49 struct list_head obd_types;
  50 unsigned long obd_memory = 0;
  51 unsigned long obd_fail_loc = 0;
  52
  53 extern struct obd_type *class_nm_to_type(char *nm);
  54
  55 /*  opening /dev/obd */
  56 static int obd_class_open(struct inode * inode, struct file * file)
  57 {
  58         ENTRY;
  59
  60         file->private_data = NULL;
  61         MOD_INC_USE_COUNT;
  62         RETURN(0);
  63 }
  64
  65 /*  closing /dev/obd */
  66 static int obd_class_release(struct inode * inode, struct file * file)
  67 {
  68         ENTRY;
  69
  70         if (file->private_data)
  71                 file->private_data = NULL;
  72
  73         MOD_DEC_USE_COUNT;
  74         RETURN(0);
  75 }
  76
  77
  78 inline void obd_data2conn(struct lustre_handle *conn, struct obd_ioctl_data *data)
  79 {
  80         conn->addr = data->ioc_addr;
  81         conn->cookie = data->ioc_cookie;
  82 }
  83
  84
  85 inline void obd_conn2data(struct obd_ioctl_data *data, struct lustre_handle *conn)
  86 {
  87         data->ioc_addr = conn->addr;
  88         data->ioc_cookie = conn->cookie;
  89 }
  90
  91
  92 /* to control /dev/obd */
  93 static int obd_class_ioctl (struct inode * inode, struct file * filp,
  94                             unsigned int cmd, unsigned long arg)
  95 {
  96         char *buf;
  97         int len;
  98         struct obd_ioctl_data *data;
  99         struct obd_device *obd = filp->private_data;
 100         struct lustre_handle conn;
 101         int rw = OBD_BRW_READ;
 102         int err = 0;
 103         ENTRY;
 104
 105         down(&obd_conf_sem);
 106
 107         if (!obd && cmd != OBD_IOC_DEVICE && cmd != TCGETS &&
 108             cmd != OBD_IOC_LIST &&
 109             cmd != OBD_IOC_NAME2DEV && cmd != OBD_IOC_NEWDEV) {
 110                 CERROR("OBD ioctl: No device\n");
 111                 GOTO(out, err=-EINVAL);
 112         }
 113         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 114                 CERROR("OBD ioctl: data error\n");
 115                 GOTO(out, err=-EINVAL);
 116         }
 117         data = (struct obd_ioctl_data *)buf;
 118
 119         switch (cmd) {
 120         case TCGETS:
 121                 GOTO(out, err=-EINVAL);
 122         case OBD_IOC_DEVICE: {
 123                 CDEBUG(D_IOCTL, "\n");
 124                 if (data->ioc_dev >= MAX_OBD_DEVICES || data->ioc_dev < 0) {
 125                         CERROR("OBD ioctl: DEVICE insufficient devices\n");
 126                         GOTO(out, err=-EINVAL);
 127                 }
 128                 CDEBUG(D_IOCTL, "device %d\n", data->ioc_dev);
 129
 130                 filp->private_data = &obd_dev[data->ioc_dev];
 131                 GOTO(out, err=0);
 132         }
 133
 134         case OBD_IOC_LIST: {
 135                 int i;
 136                 char *buf2 = data->ioc_bulk;
 137                 int remains = data->ioc_inllen1;
 138
 139                 if (!data->ioc_inlbuf1) {
 140                         CERROR("No buffer passed!\n");
 141                         GOTO(out, err=-EINVAL);
 142                 }
 143
 144
 145                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 146                         int l;
 147                         struct obd_device *obd = &obd_dev[i];
 148                         if (!obd->obd_type)
 149                                 continue;
 150                         l = snprintf(buf2, remains, "%2d %s %s %s\n",
 151                                      i, obd->obd_type->typ_name,
 152                                      obd->obd_name, obd->obd_uuid);
 153                         buf2 +=l;
 154                         remains -=l;
 155                         if (remains <= 0) {
 156                                 CERROR("not enough space for device listing\n");
 157                                 break;
 158                         }
 159                 }
 160
 161                 err = copy_to_user((int *)arg, data, len);
 162                 GOTO(out, err);
 163         }
 164
 165
 166         case OBD_IOC_NAME2DEV: {
 167                 /* Resolve a device name.  This does not change the
 168                  * currently selected device.
 169                  */
 170                 int dev;
 171
 172                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1 ) {
 173                         CERROR("No name passed,!\n");
 174                         GOTO(out, err=-EINVAL);
 175                 }
 176                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 177                         CERROR("Name not nul terminated!\n");
 178                         GOTO(out, err=-EINVAL);
 179                 }
 180
 181                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 182                 dev = class_name2dev(data->ioc_inlbuf1);
 183                 data->ioc_dev = dev;
 184                 if (dev == -1) {
 185                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 186                                data->ioc_inlbuf1);
 187                         GOTO(out, err=-EINVAL);
 188                 }
 189
 190                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 191                        dev);
 192                 err = copy_to_user((int *)arg, data, sizeof(*data));
 193                 GOTO(out, err);
 194         }
 195
 196         case OBD_IOC_UUID2DEV: {
 197                 /* Resolve a device uuid.  This does not change the
 198                  * currently selected device.
 199                  */
 200                 int dev;
 201
 202                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 203                         CERROR("No UUID passed!\n");
 204                         GOTO(out, err=-EINVAL);
 205                 }
 206                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 207                         CERROR("Name not nul terminated!\n");
 208                         GOTO(out, err=-EINVAL);
 209                 }
 210
 211                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 212                 dev = class_uuid2dev(data->ioc_inlbuf1);
 213                 data->ioc_dev = dev;
 214                 if (dev == -1) {
 215                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 216                                data->ioc_inlbuf1);
 217                         GOTO(out, err=-EINVAL);
 218                 }
 219
 220                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 221                        dev);
 222                 err = copy_to_user((int *)arg, data, sizeof(*data));
 223                 GOTO(out, err);
 224         }
 225
 226         case OBD_IOC_NEWDEV: {
 227                 int dev = -1;
 228                 int i;
 229
 230                 filp->private_data = NULL;
 231                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 232                         struct obd_device *obd = &obd_dev[i];
 233                         if (!obd->obd_type) {
 234                                 filp->private_data = obd;
 235                                 dev = i;
 236                                 break;
 237                         }
 238                 }
 239
 240
 241                 data->ioc_dev = dev;
 242                 if (dev == -1)
 243                         GOTO(out, err=-EINVAL);
 244
 245                 err = copy_to_user((int *)arg, data, sizeof(*data));
 246                 GOTO(out, err);
 247         }
 248
 249         case OBD_IOC_ATTACH: {
 250                 struct obd_type *type;
 251
 252                 /* have we attached a type to this device */
 253                 if (obd->obd_flags & OBD_ATTACHED) {
 254                         CERROR("OBD: Device %d already typed as %s.\n",
 255                                obd->obd_minor, MKSTR(obd->obd_type->typ_name));
 256                         GOTO(out, err=-EBUSY);
 257                 }
 258
 259                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 260                         CERROR("No type passed!\n");
 261                         GOTO(out, err=-EINVAL);
 262                 }
 263                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 264                         CERROR("Type not nul terminated!\n");
 265                         GOTO(out, err=-EINVAL);
 266                 }
 267
 268                 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 269                        MKSTR(data->ioc_inlbuf1),
 270                        MKSTR(data->ioc_inlbuf2), MKSTR(data->ioc_inlbuf3));
 271
 272                 /* find the type */
 273
 274                 type = class_nm_to_type(data->ioc_inlbuf1);
 275                 if (!type) {
 276                         CERROR("OBD: unknown type dev %d\n", obd->obd_minor);
 277                         GOTO(out, err=-EINVAL);
 278                 }
 279
 280                 obd->obd_type = type;
 281                 INIT_LIST_HEAD(&obd->obd_exports);
 282
 283                 /* do the attach */
 284                 if (OBT(obd) && OBP(obd, attach))
 285                         err = OBP(obd,attach)(obd, sizeof(*data), data);
 286                 if (err) {
 287                         obd->obd_type = NULL;
 288                 } else {
 289                         obd->obd_flags |= OBD_ATTACHED;
 290                         type->typ_refcnt++;
 291                         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s\n",
 292                                obd->obd_minor, data->ioc_inlbuf1);
 293                         if (data->ioc_inlbuf2) {
 294                                 int len = strlen(data->ioc_inlbuf2) + 1;
 295                                 OBD_ALLOC(obd->obd_name, len + 1);
 296                                 if (!obd->obd_name) {
 297                                         CERROR("no memory\n");
 298                                         LBUG();
 299                                 }
 300                                 memcpy(obd->obd_name, data->ioc_inlbuf2, len + 1);
 301                                 obd->obd_proc_entry =
 302                                         proc_lustre_register_obd_device(obd);
 303                         } else {
 304                                 CERROR("WARNING: unnamed obd device\n");
 305                                 obd->obd_proc_entry = NULL;
 306                         }
 307
 308                         if (data->ioc_inlbuf3) {
 309                                 int len = strlen(data->ioc_inlbuf3);
 310                                 if (len > 37) {
 311                                         CERROR("uuid should be shorter than 37 bytes\n");
 312                                         if (obd->obd_name)
 313                                                 OBD_FREE(obd->obd_name,
 314                                                          strlen(obd->obd_name) + 1);
 315                                         GOTO(out, err=-EINVAL);
 316                                 }
 317                                 memcpy(obd->obd_uuid, data->ioc_inlbuf3,
 318                                        sizeof(obd->obd_uuid));
 319                         }
 320
 321                         MOD_INC_USE_COUNT;
 322                 }
 323
 324                 GOTO(out, err);
 325         }
 326
 327         case OBD_IOC_DETACH: {
 328                 ENTRY;
 329                 if (obd->obd_flags & OBD_SET_UP) {
 330                         CERROR("OBD device %d still set up\n", obd->obd_minor);
 331                         GOTO(out, err=-EBUSY);
 332                 }
 333                 if (! (obd->obd_flags & OBD_ATTACHED) ) {
 334                         CERROR("OBD device %d not attached\n", obd->obd_minor);
 335                         GOTO(out, err=-ENODEV);
 336                 }
 337                 if ( !list_empty(&obd->obd_exports) ) {
 338                         CERROR("OBD device %d has exports\n",
 339                                obd->obd_minor);
 340                         GOTO(out, err=-EBUSY);
 341                 }
 342
 343                 if (obd->obd_name) {
 344                         OBD_FREE(obd->obd_name, strlen(obd->obd_name)+ 1);
 345                         obd->obd_name = NULL;
 346                 }
 347
 348                 if (obd->obd_proc_entry)
 349                         proc_lustre_release_obd_device(obd);
 350
 351                 obd->obd_flags &= ~OBD_ATTACHED;
 352                 obd->obd_type->typ_refcnt--;
 353                 obd->obd_type = NULL;
 354                 MOD_DEC_USE_COUNT;
 355                 GOTO(out, err=0);
 356         }
 357
 358         case OBD_IOC_SETUP: {
 359                 /* have we attached a type to this device? */
 360                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 361                         CERROR("Device %d not attached\n", obd->obd_minor);
 362                         GOTO(out, err=-ENODEV);
 363                 }
 364
 365                 /* has this been done already? */
 366                 if ( obd->obd_flags & OBD_SET_UP ) {
 367                         CERROR("Device %d already setup (type %s)\n",
 368                                obd->obd_minor, obd->obd_type->typ_name);
 369                         GOTO(out, err=-EBUSY);
 370                 }
 371
 372                 if ( OBT(obd) && OBP(obd, setup) )
 373                         err = obd_setup(obd, sizeof(*data), data);
 374
 375                 if (!err) {
 376                         obd->obd_type->typ_refcnt++;
 377                         obd->obd_flags |= OBD_SET_UP;
 378                 }
 379
 380                 GOTO(out, err);
 381         }
 382         case OBD_IOC_CLEANUP: {
 383                 /* have we attached a type to this device? */
 384                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 385                         CERROR("Device %d not attached\n", obd->obd_minor);
 386                         GOTO(out, err=-ENODEV);
 387                 }
 388
 389                 if ( OBT(obd) && OBP(obd, cleanup) )
 390                         err = obd_cleanup(obd);
 391
 392                 if (!err) {
 393                         obd->obd_flags &= ~OBD_SET_UP;
 394                         obd->obd_type->typ_refcnt--;
 395                 }
 396                 GOTO(out, err);
 397         }
 398
 399         case OBD_IOC_CONNECT: {
 400                 obd_data2conn(&conn, data);
 401
 402                 err = obd_connect(&conn, obd);
 403
 404                 CDEBUG(D_IOCTL, "assigned export %Lx\n", conn.addr);
 405                 obd_conn2data(data, &conn);
 406                 if (err)
 407                         GOTO(out, err);
 408
 409                 err = copy_to_user((int *)arg, data, sizeof(*data));
 410                 GOTO(out, err);
 411         }
 412
 413         case OBD_IOC_DISCONNECT: {
 414                 obd_data2conn(&conn, data);
 415                 err = obd_disconnect(&conn);
 416                 GOTO(out, err);
 417         }
 418
 419         case OBD_IOC_DEC_USE_COUNT: {
 420                 MOD_DEC_USE_COUNT;
 421                 GOTO(out, err=0);
 422         }
 423
 424         case OBD_IOC_CREATE: {
 425                 obd_data2conn(&conn, data);
 426
 427                 err = obd_create(&conn, &data->ioc_obdo1);
 428                 if (err)
 429                         GOTO(out, err);
 430
 431                 err = copy_to_user((int *)arg, data, sizeof(*data));
 432                 GOTO(out, err);
 433         }
 434
 435         case OBD_IOC_GETATTR: {
 436
 437                 obd_data2conn(&conn, data);
 438                 err = obd_getattr(&conn, &data->ioc_obdo1);
 439                 if (err)
 440                         GOTO(out, err);
 441
 442                 err = copy_to_user((int *)arg, data, sizeof(*data));
 443                 GOTO(out, err);
 444         }
 445
 446         case OBD_IOC_SETATTR: {
 447                 obd_data2conn(&conn, data);
 448                 err = obd_setattr(&conn, &data->ioc_obdo1);
 449                 if (err)
 450                         GOTO(out, err);
 451
 452                 err = copy_to_user((int *)arg, data, sizeof(*data));
 453                 GOTO(out, err);
 454         }
 455
 456         case OBD_IOC_DESTROY: {
 457                 obd_data2conn(&conn, data);
 458
 459                 err = obd_destroy(&conn, &data->ioc_obdo1);
 460                 if (err)
 461                         GOTO(out, err);
 462
 463                 err = copy_to_user((int *)arg, data, sizeof(*data));
 464                 GOTO(out, err);
 465         }
 466
 467         case OBD_IOC_BRW_WRITE:
 468                 rw = OBD_BRW_WRITE;
 469         case OBD_IOC_BRW_READ: {
 470                 /* FIXME: use a better ioctl data struct than obd_ioctl_data.
 471                  *        We don't really support multiple-obdo I/Os here,
 472                  *        for example offset and count are not per-obdo.
 473                  */
 474                 struct obdo     *obdos[2] = { NULL, NULL };
 475                 obd_count       oa_bufs[2] = { 0, 0 };
 476                 struct page     **bufs = NULL;
 477                 obd_size        *counts = NULL;
 478                 obd_off         *offsets = NULL;
 479                 obd_flag        *flags = NULL;
 480                 int             num = 1;
 481                 int             pages;
 482                 int             i, j;
 483
 484                 obd_data2conn(&conn, data);
 485
 486                 pages = oa_bufs[0] = data->ioc_plen1 / PAGE_SIZE;
 487                 if (data->ioc_obdo2.o_id) {
 488                         num = 2;
 489                         oa_bufs[1] = data->ioc_plen2 / PAGE_SIZE;
 490                         pages += oa_bufs[1];
 491                 }
 492
 493                 CDEBUG(D_INODE, "BRW %s with %dx%d pages\n",
 494                        rw == OBD_BRW_READ ? "read" : "write",
 495                        num, oa_bufs[0]);
 496                 OBD_ALLOC(bufs, pages * sizeof(*bufs));
 497                 OBD_ALLOC(counts, pages * sizeof(*counts));
 498                 OBD_ALLOC(offsets, pages * sizeof(*offsets));
 499                 OBD_ALLOC(flags, pages * sizeof(*flags));
 500                 if (!bufs || !counts || !offsets || !flags) {
 501                         CERROR("no memory for %d BRW per-page data\n", pages);
 502                         err = -ENOMEM;
 503                         GOTO(brw_free, err);
 504                 }
 505
 506                 obdos[0] = &data->ioc_obdo1;
 507                 if (num > 1)
 508                         obdos[1] = &data->ioc_obdo2;
 509
 510                 for (i = 0, pages = 0; i < num; i++) {
 511                         unsigned long off;
 512                         void *from;
 513
 514                         from = (&data->ioc_pbuf1)[i];
 515                         off = data->ioc_offset;
 516
 517                         for (j = 0; j < oa_bufs[i];
 518                              j++, pages++, off += PAGE_SIZE, from += PAGE_SIZE){
 519                                 unsigned long to;
 520
 521                                 to = __get_free_pages(GFP_KERNEL, 0);
 522                                 if (!to) {
 523                                 /*      ||
 524                                     copy_from_user((void *)to,from,PAGE_SIZE))
 525                                         free_pages(to, 0);
 526                                  */
 527                                         CERROR("no memory for brw pages\n");
 528                                         err = -ENOMEM;
 529                                         GOTO(brw_cleanup, err);
 530                                 }
 531                                 bufs[pages] = virt_to_page(to);
 532                                 counts[pages] = PAGE_SIZE;
 533                                 offsets[pages] = off;
 534                                 flags[pages] = 0;
 535                         }
 536                 }
 537
 538                 err = obd_brw(rw, &conn, num, obdos, oa_bufs, bufs,
 539                               counts, offsets, flags, NULL);
 540
 541                 EXIT;
 542         brw_cleanup:
 543                 i = pages;
 544                 while (i-- > 0)
 545                         __free_pages(bufs[i], 0);
 546         brw_free:
 547                 OBD_FREE(bufs, pages * sizeof(*bufs));
 548                 OBD_FREE(counts, pages * sizeof(*counts));
 549                 OBD_FREE(offsets, pages * sizeof(*offsets));
 550                 OBD_FREE(flags, pages * sizeof(*flags));
 551                 GOTO(out, err);
 552         }
 553         default:
 554                 obd_data2conn(&conn, data);
 555
 556                 err = obd_iocontrol(cmd, &conn, len, data, NULL);
 557                 if (err)
 558                         GOTO(out, err);
 559
 560                 err = copy_to_user((int *)arg, data, len);
 561                 GOTO(out, err);
 562         }
 563
 564  out:
 565         OBD_FREE(buf, len);
 566         up(&obd_conf_sem);
 567         RETURN(err);
 568 } /* obd_class_ioctl */
 569
 570
 571
 572 /* declare character device */
 573 static struct file_operations obd_psdev_fops = {
 574         ioctl: obd_class_ioctl,       /* ioctl */
 575         open: obd_class_open,        /* open */
 576         release: obd_class_release,     /* release */
 577 };
 578
 579 /* modules setup */
 580 #define OBD_MINOR 241
 581 static struct miscdevice obd_psdev = {
 582         OBD_MINOR,
 583         "obd_psdev",
 584         &obd_psdev_fops
 585 };
 586
 587
 588 EXPORT_SYMBOL(obd_dev);
 589 EXPORT_SYMBOL(obdo_cachep);
 590 EXPORT_SYMBOL(obd_memory);
 591 EXPORT_SYMBOL(obd_fail_loc);
 592
 593 EXPORT_SYMBOL(class_register_type);
 594 EXPORT_SYMBOL(class_unregister_type);
 595 EXPORT_SYMBOL(class_name2dev);
 596 EXPORT_SYMBOL(class_uuid2dev);
 597 EXPORT_SYMBOL(class_uuid2obd);
 598 EXPORT_SYMBOL(class_connect);
 599 EXPORT_SYMBOL(class_conn2export);
 600 EXPORT_SYMBOL(class_conn2obd);
 601 EXPORT_SYMBOL(class_disconnect);
 602 //EXPORT_SYMBOL(class_multi_setup);
 603 //EXPORT_SYMBOL(class_multi_cleanup);
 604
 605 static int __init init_obdclass(void)
 606 {
 607         int err;
 608         int i;
 609
 610         printk(KERN_INFO "OBD class driver  v0.9, info@clusterfs.com\n");
 611
 612         sema_init(&obd_conf_sem, 1);
 613         INIT_LIST_HEAD(&obd_types);
 614
 615         if ((err = misc_register(&obd_psdev))) {
 616                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 617                 return err;
 618         }
 619
 620         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 621                 memset(&(obd_dev[i]), 0, sizeof(obd_dev[i]));
 622                 obd_dev[i].obd_minor = i;
 623                 INIT_LIST_HEAD(&obd_dev[i].obd_exports);
 624         }
 625
 626         err = obd_init_caches();
 627         if (err)
 628                 return err;
 629         obd_sysctl_init();
 630         return 0;
 631 }
 632
 633 static void __exit cleanup_obdclass(void)
 634 {
 635         int i;
 636         ENTRY;
 637
 638         misc_deregister(&obd_psdev);
 639         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 640                 struct obd_device *obd = &obd_dev[i];
 641                 if (obd->obd_type && (obd->obd_flags & OBD_SET_UP) &&
 642                     OBT(obd) && OBP(obd, detach)) {
 643                         /* XXX should this call generic detach otherwise? */
 644                         OBP(obd, detach)(obd);
 645                 }
 646         }
 647
 648         obd_cleanup_caches();
 649         obd_sysctl_clean();
 650         CERROR("obd memory leaked: %ld bytes\n", obd_memory);
 651         EXIT;
 652 }
 653
 654 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 655 MODULE_DESCRIPTION("Lustre Class Driver v1.0");
 656 MODULE_LICENSE("GPL");
 657
 658 module_init(init_obdclass);
 659 module_exit(cleanup_obdclass);