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/sched.h>
  23 #include <linux/lp.h>
  24 #include <linux/slab.h>
  25 #include <linux/ioport.h>
  26 #include <linux/fcntl.h>
  27 #include <linux/delay.h>
  28 #include <linux/skbuff.h>
  29 #include <linux/proc_fs.h>
  30 #include <linux/fs.h>
  31 #include <linux/poll.h>
  32 #include <linux/init.h>
  33 #include <linux/list.h>
  34 #include <asm/io.h>
  35 #include <asm/system.h>
  36 #include <asm/poll.h>
  37 #include <asm/uaccess.h>
  38 #include <linux/miscdevice.h>
  39
  40 #define DEBUG_SUBSYSTEM S_CLASS
  41
  42 #include <linux/obd_support.h>
  43 #include <linux/obd_class.h>
  44 #include <linux/smp_lock.h>
  45
  46 struct semaphore obd_conf_sem;   /* serialize configuration commands */
  47 struct obd_device obd_dev[MAX_OBD_DEVICES];
  48 struct list_head obd_types;
  49 unsigned long obd_memory = 0;
  50 unsigned long obd_fail_loc = 0;
  51
  52 extern struct obd_type *class_nm_to_type(char *nm);
  53
  54 /*  opening /dev/obd */
  55 static int obd_class_open(struct inode * inode, struct file * file)
  56 {
  57         ENTRY;
  58
  59         file->private_data = NULL;
  60         MOD_INC_USE_COUNT;
  61         RETURN(0);
  62 }
  63
  64 /*  closing /dev/obd */
  65 static int obd_class_release(struct inode * inode, struct file * file)
  66 {
  67         ENTRY;
  68
  69         if (file->private_data)
  70                 file->private_data = NULL;
  71
  72         MOD_DEC_USE_COUNT;
  73         RETURN(0);
  74 }
  75
  76
  77 inline void obd_data2conn(struct lustre_handle *conn, struct obd_ioctl_data *data)
  78 {
  79         conn->addr = data->ioc_addr;
  80         conn->cookie = data->ioc_cookie;
  81 }
  82
  83
  84 inline void obd_conn2data(struct obd_ioctl_data *data, struct lustre_handle *conn)
  85 {
  86         data->ioc_addr = conn->addr;
  87         data->ioc_cookie = conn->cookie;
  88 }
  89
  90
  91 /* to control /dev/obd */
  92 static int obd_class_ioctl (struct inode * inode, struct file * filp,
  93                             unsigned int cmd, unsigned long arg)
  94 {
  95         char *buf = NULL;
  96         int len = 0;
  97         struct obd_ioctl_data *data;
  98         struct obd_device *obd = filp->private_data;
  99         struct lustre_handle conn;
 100         int rw = OBD_BRW_READ;
 101         int err = 0;
 102         ENTRY;
 103
 104         down(&obd_conf_sem);
 105
 106         if (!obd && cmd != OBD_IOC_DEVICE && cmd != TCGETS &&
 107             cmd != OBD_IOC_LIST &&
 108             cmd != OBD_IOC_NAME2DEV && cmd != OBD_IOC_NEWDEV) {
 109                 CERROR("OBD ioctl: No device\n");
 110                 GOTO(out, err=-EINVAL);
 111         }
 112         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 113                 CERROR("OBD ioctl: data error\n");
 114                 GOTO(out, err=-EINVAL);
 115         }
 116         data = (struct obd_ioctl_data *)buf;
 117
 118         switch (cmd) {
 119         case TCGETS:
 120                 GOTO(out, err=-EINVAL);
 121         case OBD_IOC_DEVICE: {
 122                 CDEBUG(D_IOCTL, "\n");
 123                 if (data->ioc_dev >= MAX_OBD_DEVICES || data->ioc_dev < 0) {
 124                         CERROR("OBD ioctl: DEVICE insufficient devices\n");
 125                         GOTO(out, err=-EINVAL);
 126                 }
 127                 CDEBUG(D_IOCTL, "device %d\n", data->ioc_dev);
 128
 129                 filp->private_data = &obd_dev[data->ioc_dev];
 130                 GOTO(out, err=0);
 131         }
 132
 133         case OBD_IOC_LIST: {
 134                 int i;
 135                 char *buf2 = data->ioc_bulk;
 136                 int remains = data->ioc_inllen1;
 137
 138                 if (!data->ioc_inlbuf1) {
 139                         CERROR("No buffer passed!\n");
 140                         GOTO(out, err=-EINVAL);
 141                 }
 142
 143
 144                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 145                         int l;
 146                         char *status;
 147                         struct obd_device *obd = &obd_dev[i];
 148                         if (!obd->obd_type)
 149                                 continue;
 150                         if (obd->obd_flags & OBD_SET_UP)
 151                                 status = "*";
 152                         else
 153                                 status = " ";
 154                         l = snprintf(buf2, remains, "%2d %s %s %s %s\n",
 155                                      i, status, obd->obd_type->typ_name,
 156                                      obd->obd_name, obd->obd_uuid);
 157                         buf2 +=l;
 158                         remains -=l;
 159                         if (remains <= 0) {
 160                                 CERROR("not enough space for device listing\n");
 161                                 break;
 162                         }
 163                 }
 164
 165                 err = copy_to_user((int *)arg, data, len);
 166                 GOTO(out, err);
 167         }
 168
 169
 170         case OBD_IOC_NAME2DEV: {
 171                 /* Resolve a device name.  This does not change the
 172                  * currently selected device.
 173                  */
 174                 int dev;
 175
 176                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1 ) {
 177                         CERROR("No name passed,!\n");
 178                         GOTO(out, err=-EINVAL);
 179                 }
 180                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 181                         CERROR("Name not nul terminated!\n");
 182                         GOTO(out, err=-EINVAL);
 183                 }
 184
 185                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 186                 dev = class_name2dev(data->ioc_inlbuf1);
 187                 data->ioc_dev = dev;
 188                 if (dev == -1) {
 189                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 190                                data->ioc_inlbuf1);
 191                         GOTO(out, err=-EINVAL);
 192                 }
 193
 194                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 195                        dev);
 196                 err = copy_to_user((int *)arg, data, sizeof(*data));
 197                 GOTO(out, err);
 198         }
 199
 200         case OBD_IOC_UUID2DEV: {
 201                 /* Resolve a device uuid.  This does not change the
 202                  * currently selected device.
 203                  */
 204                 int dev;
 205
 206                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 207                         CERROR("No UUID passed!\n");
 208                         GOTO(out, err=-EINVAL);
 209                 }
 210                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 211                         CERROR("Name not nul terminated!\n");
 212                         GOTO(out, err=-EINVAL);
 213                 }
 214
 215                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 216                 dev = class_uuid2dev(data->ioc_inlbuf1);
 217                 data->ioc_dev = dev;
 218                 if (dev == -1) {
 219                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 220                                data->ioc_inlbuf1);
 221                         GOTO(out, err=-EINVAL);
 222                 }
 223
 224                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 225                        dev);
 226                 err = copy_to_user((int *)arg, data, sizeof(*data));
 227                 GOTO(out, err);
 228         }
 229
 230         case OBD_IOC_NEWDEV: {
 231                 int dev = -1;
 232                 int i;
 233
 234                 filp->private_data = NULL;
 235                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 236                         struct obd_device *obd = &obd_dev[i];
 237                         if (!obd->obd_type) {
 238                                 filp->private_data = obd;
 239                                 dev = i;
 240                                 break;
 241                         }
 242                 }
 243
 244
 245                 data->ioc_dev = dev;
 246                 if (dev == -1)
 247                         GOTO(out, err=-EINVAL);
 248
 249                 err = copy_to_user((int *)arg, data, sizeof(*data));
 250                 GOTO(out, err);
 251         }
 252
 253         case OBD_IOC_ATTACH: {
 254                 struct obd_type *type;
 255
 256                 /* have we attached a type to this device */
 257                 if (obd->obd_flags & OBD_ATTACHED) {
 258                         CERROR("OBD: Device %d already typed as %s.\n",
 259                                obd->obd_minor, MKSTR(obd->obd_type->typ_name));
 260                         GOTO(out, err=-EBUSY);
 261                 }
 262
 263                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 264                         CERROR("No type passed!\n");
 265                         GOTO(out, err=-EINVAL);
 266                 }
 267                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 268                         CERROR("Type not nul terminated!\n");
 269                         GOTO(out, err=-EINVAL);
 270                 }
 271
 272                 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 273                        MKSTR(data->ioc_inlbuf1),
 274                        MKSTR(data->ioc_inlbuf2), MKSTR(data->ioc_inlbuf3));
 275
 276                 /* find the type */
 277
 278                 type = class_nm_to_type(data->ioc_inlbuf1);
 279                 if (!type) {
 280                         CERROR("OBD: unknown type dev %d\n", obd->obd_minor);
 281                         GOTO(out, err=-EINVAL);
 282                 }
 283
 284                 obd->obd_type = type;
 285                 INIT_LIST_HEAD(&obd->obd_exports);
 286
 287                 /* do the attach */
 288                 if (OBT(obd) && OBP(obd, attach))
 289                         err = OBP(obd,attach)(obd, sizeof(*data), data);
 290                 if (err) {
 291                         obd->obd_type = NULL;
 292                 } else {
 293                         obd->obd_flags |= OBD_ATTACHED;
 294                         type->typ_refcnt++;
 295                         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s\n",
 296                                obd->obd_minor, data->ioc_inlbuf1);
 297                         if (data->ioc_inlbuf2) {
 298                                 int len = strlen(data->ioc_inlbuf2) + 1;
 299                                 OBD_ALLOC(obd->obd_name, len);
 300                                 if (!obd->obd_name) {
 301                                         CERROR("no memory\n");
 302                                         LBUG();
 303                                 }
 304                                 memcpy(obd->obd_name, data->ioc_inlbuf2, len);
 305                                 //obd->obd_proc_entry =
 306                                 //        proc_lustre_register_obd_device(obd);
 307                         } else {
 308                                 CERROR("WARNING: unnamed obd device\n");
 309                                 obd->obd_proc_entry = NULL;
 310                         }
 311
 312                         if (data->ioc_inlbuf3) {
 313                                 int len = strlen(data->ioc_inlbuf3);
 314                                 if (len > 37) {
 315                                         CERROR("uuid should be shorter than 37 bytes\n");
 316                                         if (obd->obd_name)
 317                                                 OBD_FREE(obd->obd_name,
 318                                                          strlen(obd->obd_name) + 1);
 319                                         GOTO(out, err=-EINVAL);
 320                                 }
 321                                 memcpy(obd->obd_uuid, data->ioc_inlbuf3,
 322                                        sizeof(obd->obd_uuid));
 323                         }
 324
 325                         MOD_INC_USE_COUNT;
 326                 }
 327
 328                 GOTO(out, err);
 329         }
 330
 331         case OBD_IOC_DETACH: {
 332                 ENTRY;
 333                 if (obd->obd_flags & OBD_SET_UP) {
 334                         CERROR("OBD device %d still set up\n", obd->obd_minor);
 335                         GOTO(out, err=-EBUSY);
 336                 }
 337                 if (! (obd->obd_flags & OBD_ATTACHED) ) {
 338                         CERROR("OBD device %d not attached\n", obd->obd_minor);
 339                         GOTO(out, err=-ENODEV);
 340                 }
 341                 if ( !list_empty(&obd->obd_exports) ) {
 342                         CERROR("OBD device %d has exports\n",
 343                                obd->obd_minor);
 344                         GOTO(out, err=-EBUSY);
 345                 }
 346
 347                 if (obd->obd_name) {
 348                         OBD_FREE(obd->obd_name, strlen(obd->obd_name)+1);
 349                         obd->obd_name = NULL;
 350                 }
 351
 352                 //if (obd->obd_proc_entry)
 353                   //      proc_lustre_release_obd_device(obd);
 354
 355                 obd->obd_flags &= ~OBD_ATTACHED;
 356                 obd->obd_type->typ_refcnt--;
 357                 obd->obd_type = NULL;
 358                 MOD_DEC_USE_COUNT;
 359                 GOTO(out, err=0);
 360         }
 361
 362         case OBD_IOC_SETUP: {
 363                 /* have we attached a type to this device? */
 364                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 365                         CERROR("Device %d not attached\n", obd->obd_minor);
 366                         GOTO(out, err=-ENODEV);
 367                 }
 368
 369                 /* has this been done already? */
 370                 if ( obd->obd_flags & OBD_SET_UP ) {
 371                         CERROR("Device %d already setup (type %s)\n",
 372                                obd->obd_minor, obd->obd_type->typ_name);
 373                         GOTO(out, err=-EBUSY);
 374                 }
 375
 376                 if ( OBT(obd) && OBP(obd, setup) )
 377                         err = obd_setup(obd, sizeof(*data), data);
 378
 379                 if (!err) {
 380                         obd->obd_type->typ_refcnt++;
 381                         obd->obd_flags |= OBD_SET_UP;
 382                 }
 383
 384                 GOTO(out, err);
 385         }
 386         case OBD_IOC_CLEANUP: {
 387                 /* have we attached a type to this device? */
 388                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 389                         CERROR("Device %d not attached\n", obd->obd_minor);
 390                         GOTO(out, err=-ENODEV);
 391                 }
 392
 393                 if ( OBT(obd) && OBP(obd, cleanup) )
 394                         err = obd_cleanup(obd);
 395
 396                 if (!err) {
 397                         obd->obd_flags &= ~OBD_SET_UP;
 398                         obd->obd_type->typ_refcnt--;
 399                 }
 400                 GOTO(out, err);
 401         }
 402
 403         case OBD_IOC_CONNECT: {
 404                 obd_data2conn(&conn, data);
 405
 406                 err = obd_connect(&conn, obd);
 407
 408                 CDEBUG(D_IOCTL, "assigned export %Lx\n", conn.addr);
 409                 obd_conn2data(data, &conn);
 410                 if (err)
 411                         GOTO(out, err);
 412
 413                 err = copy_to_user((int *)arg, data, sizeof(*data));
 414                 GOTO(out, err);
 415         }
 416
 417         case OBD_IOC_DISCONNECT: {
 418                 obd_data2conn(&conn, data);
 419                 err = obd_disconnect(&conn);
 420                 GOTO(out, err);
 421         }
 422
 423         case OBD_IOC_DEC_USE_COUNT: {
 424                 MOD_DEC_USE_COUNT;
 425                 GOTO(out, err=0);
 426         }
 427
 428         case OBD_IOC_CREATE: {
 429                 obd_data2conn(&conn, data);
 430
 431
 432                 err = obd_create(&conn, &data->ioc_obdo1);
 433                 if (err)
 434                         GOTO(out, err);
 435
 436                 err = copy_to_user((int *)arg, data, sizeof(*data));
 437                 GOTO(out, err);
 438         }
 439
 440         case OBD_IOC_GETATTR: {
 441
 442                 obd_data2conn(&conn, data);
 443                 err = obd_getattr(&conn, &data->ioc_obdo1);
 444                 if (err)
 445                         GOTO(out, err);
 446
 447                 err = copy_to_user((int *)arg, data, sizeof(*data));
 448                 GOTO(out, err);
 449         }
 450
 451         case OBD_IOC_SETATTR: {
 452                 obd_data2conn(&conn, data);
 453                 err = obd_setattr(&conn, &data->ioc_obdo1);
 454                 if (err)
 455                         GOTO(out, err);
 456
 457                 err = copy_to_user((int *)arg, data, sizeof(*data));
 458                 GOTO(out, err);
 459         }
 460
 461         case OBD_IOC_DESTROY: {
 462                 obd_data2conn(&conn, data);
 463
 464                 err = obd_destroy(&conn, &data->ioc_obdo1);
 465                 if (err)
 466                         GOTO(out, err);
 467
 468                 err = copy_to_user((int *)arg, data, sizeof(*data));
 469                 GOTO(out, err);
 470         }
 471
 472         case OBD_IOC_BRW_WRITE:
 473                 rw = OBD_BRW_WRITE;
 474         case OBD_IOC_BRW_READ: {
 475                 /* FIXME: use a better ioctl data struct than obd_ioctl_data.
 476                  *        We don't really support multiple-obdo I/Os here,
 477                  *        for example offset and count are not per-obdo.
 478                  */
 479                 struct obdo     *obdos[2] = { NULL, NULL };
 480                 obd_count       oa_bufs[2] = { 0, 0 };
 481                 struct page     **bufs = NULL;
 482                 obd_size        *counts = NULL;
 483                 obd_off         *offsets = NULL;
 484                 obd_flag        *flags = NULL;
 485                 int             num = 1;
 486                 int             pages;
 487                 int             i, j;
 488
 489                 obd_data2conn(&conn, data);
 490
 491                 pages = oa_bufs[0] = data->ioc_plen1 / PAGE_SIZE;
 492                 if (data->ioc_obdo2.o_id) {
 493                         num = 2;
 494                         oa_bufs[1] = data->ioc_plen2 / PAGE_SIZE;
 495                         pages += oa_bufs[1];
 496                 }
 497
 498                 CDEBUG(D_INODE, "BRW %s with %dx%d pages\n",
 499                        rw == OBD_BRW_READ ? "read" : "write",
 500                        num, oa_bufs[0]);
 501                 OBD_ALLOC(bufs, pages * sizeof(*bufs));
 502                 OBD_ALLOC(counts, pages * sizeof(*counts));
 503                 OBD_ALLOC(offsets, pages * sizeof(*offsets));
 504                 OBD_ALLOC(flags, pages * sizeof(*flags));
 505                 if (!bufs || !counts || !offsets || !flags) {
 506                         CERROR("no memory for %d BRW per-page data\n", pages);
 507                         err = -ENOMEM;
 508                         GOTO(brw_free, err);
 509                 }
 510
 511                 obdos[0] = &data->ioc_obdo1;
 512                 if (num > 1)
 513                         obdos[1] = &data->ioc_obdo2;
 514
 515                 for (i = 0, pages = 0; i < num; i++) {
 516                         unsigned long off;
 517                         void *from;
 518
 519                         from = (&data->ioc_pbuf1)[i];
 520                         off = data->ioc_offset;
 521
 522                         for (j = 0; j < oa_bufs[i];
 523                              j++, pages++, off += PAGE_SIZE, from += PAGE_SIZE){
 524                                 unsigned long to;
 525
 526                                 to = __get_free_pages(GFP_KERNEL, 0);
 527                                 if (!to) {
 528                                 /*      ||
 529                                     copy_from_user((void *)to,from,PAGE_SIZE))
 530                                         free_pages(to, 0);
 531                                  */
 532                                         CERROR("no memory for brw pages\n");
 533                                         err = -ENOMEM;
 534                                         GOTO(brw_cleanup, err);
 535                                 }
 536                                 bufs[pages] = virt_to_page(to);
 537                                 counts[pages] = PAGE_SIZE;
 538                                 offsets[pages] = off;
 539                                 flags[pages] = 0;
 540                         }
 541                 }
 542
 543                 err = obd_brw(rw, &conn, num, obdos, oa_bufs, bufs,
 544                               counts, offsets, flags, NULL);
 545
 546                 EXIT;
 547         brw_cleanup:
 548                 i = pages;
 549                 while (i-- > 0)
 550                         __free_pages(bufs[i], 0);
 551         brw_free:
 552                 OBD_FREE(bufs, pages * sizeof(*bufs));
 553                 OBD_FREE(counts, pages * sizeof(*counts));
 554                 OBD_FREE(offsets, pages * sizeof(*offsets));
 555                 OBD_FREE(flags, pages * sizeof(*flags));
 556                 GOTO(out, err);
 557         }
 558         default:
 559                 obd_data2conn(&conn, data);
 560
 561                 err = obd_iocontrol(cmd, &conn, len, data, NULL);
 562                 if (err)
 563                         GOTO(out, err);
 564
 565                 err = copy_to_user((int *)arg, data, len);
 566                 GOTO(out, err);
 567         }
 568
 569  out:
 570         if (buf)
 571                 OBD_FREE(buf, len);
 572         up(&obd_conf_sem);
 573         RETURN(err);
 574 } /* obd_class_ioctl */
 575
 576
 577
 578 /* declare character device */
 579 static struct file_operations obd_psdev_fops = {
 580         ioctl: obd_class_ioctl,       /* ioctl */
 581         open: obd_class_open,        /* open */
 582         release: obd_class_release,     /* release */
 583 };
 584
 585 /* modules setup */
 586 #define OBD_MINOR 241
 587 static struct miscdevice obd_psdev = {
 588         OBD_MINOR,
 589         "obd_psdev",
 590         &obd_psdev_fops
 591 };
 592
 593
 594 EXPORT_SYMBOL(obd_dev);
 595 EXPORT_SYMBOL(obdo_cachep);
 596 EXPORT_SYMBOL(obd_memory);
 597 EXPORT_SYMBOL(obd_fail_loc);
 598
 599 EXPORT_SYMBOL(class_register_type);
 600 EXPORT_SYMBOL(class_unregister_type);
 601 EXPORT_SYMBOL(class_name2dev);
 602 EXPORT_SYMBOL(class_uuid2dev);
 603 EXPORT_SYMBOL(class_uuid2obd);
 604 EXPORT_SYMBOL(class_connect);
 605 EXPORT_SYMBOL(class_conn2export);
 606 EXPORT_SYMBOL(class_conn2obd);
 607 EXPORT_SYMBOL(class_disconnect);
 608 //EXPORT_SYMBOL(class_multi_setup);
 609 //EXPORT_SYMBOL(class_multi_cleanup);
 610
 611 static int __init init_obdclass(void)
 612 {
 613         int err;
 614         int i;
 615
 616         printk(KERN_INFO "OBD class driver  v0.9, info@clusterfs.com\n");
 617
 618         sema_init(&obd_conf_sem, 1);
 619         INIT_LIST_HEAD(&obd_types);
 620
 621         if ((err = misc_register(&obd_psdev))) {
 622                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 623                 return err;
 624         }
 625
 626         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 627                 memset(&(obd_dev[i]), 0, sizeof(obd_dev[i]));
 628                 obd_dev[i].obd_minor = i;
 629                 INIT_LIST_HEAD(&obd_dev[i].obd_exports);
 630         }
 631
 632         err = obd_init_caches();
 633         if (err)
 634                 return err;
 635         obd_sysctl_init();
 636         return 0;
 637 }
 638
 639 static void __exit cleanup_obdclass(void)
 640 {
 641         int i;
 642         ENTRY;
 643
 644         misc_deregister(&obd_psdev);
 645         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 646                 struct obd_device *obd = &obd_dev[i];
 647                 if (obd->obd_type && (obd->obd_flags & OBD_SET_UP) &&
 648                     OBT(obd) && OBP(obd, detach)) {
 649                         /* XXX should this call generic detach otherwise? */
 650                         OBP(obd, detach)(obd);
 651                 }
 652         }
 653
 654         obd_cleanup_caches();
 655         obd_sysctl_clean();
 656         CERROR("obd memory leaked: %ld bytes\n", obd_memory);
 657         EXIT;
 658 }
 659
 660 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 661 MODULE_DESCRIPTION("Lustre Class Driver v1.0");
 662 MODULE_LICENSE("GPL");
 663
 664 module_init(init_obdclass);
 665 module_exit(cleanup_obdclass);