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, 2002 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  */
  14
  15 #define EXPORT_SYMTAB
  16 #include <linux/config.h> /* for CONFIG_PROC_FS */
  17 #include <linux/module.h>
  18 #include <linux/errno.h>
  19 #include <linux/kernel.h>
  20 #include <linux/major.h>
  21 #include <linux/sched.h>
  22 #include <linux/lp.h>
  23 #include <linux/slab.h>
  24 #include <linux/ioport.h>
  25 #include <linux/fcntl.h>
  26 #include <linux/delay.h>
  27 #include <linux/skbuff.h>
  28 #include <linux/proc_fs.h>
  29 #include <linux/fs.h>
  30 #include <linux/poll.h>
  31 #include <linux/init.h>
  32 #include <linux/list.h>
  33 #include <asm/io.h>
  34 #include <asm/system.h>
  35 #include <asm/poll.h>
  36 #include <asm/uaccess.h>
  37 #include <linux/miscdevice.h>
  38
  39 #define DEBUG_SUBSYSTEM S_CLASS
  40
  41 #include <linux/obd_support.h>
  42 #include <linux/obd_class.h>
  43 #include <linux/smp_lock.h>
  44
  45 struct semaphore obd_conf_sem;   /* serialize configuration commands */
  46 struct obd_device obd_dev[MAX_OBD_DEVICES];
  47 struct list_head obd_types;
  48 unsigned long obd_memory = 0;
  49 unsigned long obd_fail_loc = 0;
  50
  51 extern struct obd_type *class_nm_to_type(char *nm);
  52
  53 /*  opening /dev/obd */
  54 static int obd_class_open(struct inode * inode, struct file * file)
  55 {
  56         ENTRY;
  57
  58         file->private_data = NULL;
  59         MOD_INC_USE_COUNT;
  60         RETURN(0);
  61 }
  62
  63 /*  closing /dev/obd */
  64 static int obd_class_release(struct inode * inode, struct file * file)
  65 {
  66         ENTRY;
  67
  68         if (file->private_data)
  69                 file->private_data = NULL;
  70
  71         MOD_DEC_USE_COUNT;
  72         RETURN(0);
  73 }
  74
  75
  76 inline void obd_data2conn(struct lustre_handle *conn, struct obd_ioctl_data *data)
  77 {
  78         conn->addr = data->ioc_addr;
  79         conn->cookie = data->ioc_cookie;
  80 }
  81
  82
  83 inline void obd_conn2data(struct obd_ioctl_data *data, struct lustre_handle *conn)
  84 {
  85         data->ioc_addr = conn->addr;
  86         data->ioc_cookie = conn->cookie;
  87 }
  88
  89
  90 /* to control /dev/obd */
  91 static int obd_class_ioctl (struct inode * inode, struct file * filp,
  92                             unsigned int cmd, unsigned long arg)
  93 {
  94         char *buf = NULL;
  95         int len = 0;
  96         struct obd_ioctl_data *data;
  97         struct obd_device *obd = filp->private_data;
  98         struct lustre_handle conn;
  99         int rw = OBD_BRW_READ;
 100         int err = 0;
 101         ENTRY;
 102
 103         down(&obd_conf_sem);
 104
 105         if (!obd && cmd != OBD_IOC_DEVICE && cmd != TCGETS &&
 106             cmd != OBD_IOC_LIST &&
 107             cmd != OBD_IOC_NAME2DEV && cmd != OBD_IOC_NEWDEV) {
 108                 CERROR("OBD ioctl: No device\n");
 109                 GOTO(out, err=-EINVAL);
 110         }
 111         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 112                 CERROR("OBD ioctl: data error\n");
 113                 GOTO(out, err=-EINVAL);
 114         }
 115         data = (struct obd_ioctl_data *)buf;
 116
 117         switch (cmd) {
 118         case TCGETS:
 119                 GOTO(out, err=-EINVAL);
 120         case OBD_IOC_DEVICE: {
 121                 CDEBUG(D_IOCTL, "\n");
 122                 if (data->ioc_dev >= MAX_OBD_DEVICES || data->ioc_dev < 0) {
 123                         CERROR("OBD ioctl: DEVICE insufficient devices\n");
 124                         GOTO(out, err=-EINVAL);
 125                 }
 126                 CDEBUG(D_IOCTL, "device %d\n", data->ioc_dev);
 127
 128                 filp->private_data = &obd_dev[data->ioc_dev];
 129                 GOTO(out, err=0);
 130         }
 131
 132         case OBD_IOC_LIST: {
 133                 int i;
 134                 char *buf2 = data->ioc_bulk;
 135                 int remains = data->ioc_inllen1;
 136
 137                 if (!data->ioc_inlbuf1) {
 138                         CERROR("No buffer passed!\n");
 139                         GOTO(out, err=-EINVAL);
 140                 }
 141
 142
 143                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 144                         int l;
 145                         char *status;
 146                         struct obd_device *obd = &obd_dev[i];
 147                         if (!obd->obd_type)
 148                                 continue;
 149                         if (obd->obd_flags & OBD_SET_UP)
 150                                 status = "*";
 151                         else
 152                                 status = " ";
 153                         l = snprintf(buf2, remains, "%2d %s %s %s %s\n",
 154                                      i, status, obd->obd_type->typ_name,
 155                                      obd->obd_name, obd->obd_uuid);
 156                         buf2 +=l;
 157                         remains -=l;
 158                         if (remains <= 0) {
 159                                 CERROR("not enough space for device listing\n");
 160                                 break;
 161                         }
 162                 }
 163
 164                 err = copy_to_user((int *)arg, data, len);
 165                 GOTO(out, err);
 166         }
 167
 168
 169         case OBD_IOC_NAME2DEV: {
 170                 /* Resolve a device name.  This does not change the
 171                  * currently selected device.
 172                  */
 173                 int dev;
 174
 175                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1 ) {
 176                         CERROR("No name passed,!\n");
 177                         GOTO(out, err=-EINVAL);
 178                 }
 179                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 180                         CERROR("Name not nul terminated!\n");
 181                         GOTO(out, err=-EINVAL);
 182                 }
 183
 184                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 185                 dev = class_name2dev(data->ioc_inlbuf1);
 186                 data->ioc_dev = dev;
 187                 if (dev == -1) {
 188                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 189                                data->ioc_inlbuf1);
 190                         GOTO(out, err=-EINVAL);
 191                 }
 192
 193                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 194                        dev);
 195                 err = copy_to_user((int *)arg, data, sizeof(*data));
 196                 GOTO(out, err);
 197         }
 198
 199         case OBD_IOC_UUID2DEV: {
 200                 /* Resolve a device uuid.  This does not change the
 201                  * currently selected device.
 202                  */
 203                 int dev;
 204
 205                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 206                         CERROR("No UUID passed!\n");
 207                         GOTO(out, err=-EINVAL);
 208                 }
 209                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 210                         CERROR("Name not nul terminated!\n");
 211                         GOTO(out, err=-EINVAL);
 212                 }
 213
 214                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 215                 dev = class_uuid2dev(data->ioc_inlbuf1);
 216                 data->ioc_dev = dev;
 217                 if (dev == -1) {
 218                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 219                                data->ioc_inlbuf1);
 220                         GOTO(out, err=-EINVAL);
 221                 }
 222
 223                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 224                        dev);
 225                 err = copy_to_user((int *)arg, data, sizeof(*data));
 226                 GOTO(out, err);
 227         }
 228
 229         case OBD_IOC_NEWDEV: {
 230                 int dev = -1;
 231                 int i;
 232
 233                 filp->private_data = NULL;
 234                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 235                         struct obd_device *obd = &obd_dev[i];
 236                         if (!obd->obd_type) {
 237                                 filp->private_data = obd;
 238                                 dev = i;
 239                                 break;
 240                         }
 241                 }
 242
 243
 244                 data->ioc_dev = dev;
 245                 if (dev == -1)
 246                         GOTO(out, err=-EINVAL);
 247
 248                 err = copy_to_user((int *)arg, data, sizeof(*data));
 249                 GOTO(out, err);
 250         }
 251
 252         case OBD_IOC_ATTACH: {
 253                 struct obd_type *type;
 254
 255                 /* have we attached a type to this device */
 256                 if (obd->obd_flags & OBD_ATTACHED) {
 257                         CERROR("OBD: Device %d already typed as %s.\n",
 258                                obd->obd_minor, MKSTR(obd->obd_type->typ_name));
 259                         GOTO(out, err=-EBUSY);
 260                 }
 261
 262                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 263                         CERROR("No type passed!\n");
 264                         GOTO(out, err=-EINVAL);
 265                 }
 266                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 267                         CERROR("Type not nul terminated!\n");
 268                         GOTO(out, err=-EINVAL);
 269                 }
 270
 271                 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 272                        MKSTR(data->ioc_inlbuf1),
 273                        MKSTR(data->ioc_inlbuf2), MKSTR(data->ioc_inlbuf3));
 274
 275                 /* find the type */
 276                 type = class_nm_to_type(data->ioc_inlbuf1);
 277                 if (!type) {
 278                         CERROR("OBD: unknown type dev %d\n", obd->obd_minor);
 279                         GOTO(out, err=-EINVAL);
 280                 }
 281
 282                 obd->obd_type = type;
 283                 INIT_LIST_HEAD(&obd->obd_exports);
 284
 285                 /* do the attach */
 286                 if (OBT(obd) && OBP(obd, attach))
 287                         err = OBP(obd,attach)(obd, sizeof(*data), data);
 288                 if (err) {
 289                         obd->obd_type = NULL;
 290                 } else {
 291                         obd->obd_flags |= OBD_ATTACHED;
 292                         type->typ_refcnt++;
 293                         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s\n",
 294                                obd->obd_minor, data->ioc_inlbuf1);
 295                         if (data->ioc_inlbuf2) {
 296                                 int len = strlen(data->ioc_inlbuf2) + 1;
 297                                 OBD_ALLOC(obd->obd_name, len);
 298                                 if (!obd->obd_name) {
 299                                         CERROR("no memory\n");
 300                                         LBUG();
 301                                 }
 302                                 memcpy(obd->obd_name, data->ioc_inlbuf2, len);
 303                                 obd->obd_proc_entry =
 304                                         proc_lustre_register_obd_device(obd);
 305                         } else {
 306                                 CERROR("WARNING: unnamed obd device\n");
 307                                 obd->obd_proc_entry = NULL;
 308                         }
 309
 310                         if (data->ioc_inlbuf3) {
 311                                 int len = strlen(data->ioc_inlbuf3);
 312                                 if (len > 37) {
 313                                         CERROR("uuid should be shorter than 37 bytes\n");
 314                                         if (obd->obd_name)
 315                                                 OBD_FREE(obd->obd_name,
 316                                                          strlen(obd->obd_name) + 1);
 317                                         GOTO(out, err=-EINVAL);
 318                                 }
 319                                 memcpy(obd->obd_uuid, data->ioc_inlbuf3,
 320                                        sizeof(obd->obd_uuid));
 321                         }
 322
 323                         MOD_INC_USE_COUNT;
 324                 }
 325
 326                 GOTO(out, err);
 327         }
 328
 329         case OBD_IOC_DETACH: {
 330                 ENTRY;
 331                 if (obd->obd_flags & OBD_SET_UP) {
 332                         CERROR("OBD device %d still set up\n", obd->obd_minor);
 333                         GOTO(out, err=-EBUSY);
 334                 }
 335                 if (! (obd->obd_flags & OBD_ATTACHED) ) {
 336                         CERROR("OBD device %d not attached\n", obd->obd_minor);
 337                         GOTO(out, err=-ENODEV);
 338                 }
 339                 if ( !list_empty(&obd->obd_exports) ) {
 340                         CERROR("OBD device %d has exports\n",
 341                                obd->obd_minor);
 342                         GOTO(out, err=-EBUSY);
 343                 }
 344
 345                 if (obd->obd_name) {
 346                         OBD_FREE(obd->obd_name, strlen(obd->obd_name)+1);
 347                         obd->obd_name = NULL;
 348                 }
 349
 350                 if (obd->obd_proc_entry)
 351                         proc_lustre_release_obd_device(obd);
 352
 353                 obd->obd_flags &= ~OBD_ATTACHED;
 354                 obd->obd_type->typ_refcnt--;
 355                 obd->obd_type = NULL;
 356                 MOD_DEC_USE_COUNT;
 357                 GOTO(out, err=0);
 358         }
 359
 360         case OBD_IOC_SETUP: {
 361                 /* have we attached a type to this device? */
 362                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 363                         CERROR("Device %d not attached\n", obd->obd_minor);
 364                         GOTO(out, err=-ENODEV);
 365                 }
 366
 367                 /* has this been done already? */
 368                 if ( obd->obd_flags & OBD_SET_UP ) {
 369                         CERROR("Device %d already setup (type %s)\n",
 370                                obd->obd_minor, obd->obd_type->typ_name);
 371                         GOTO(out, err=-EBUSY);
 372                 }
 373
 374                 if ( OBT(obd) && OBP(obd, setup) )
 375                         err = obd_setup(obd, sizeof(*data), data);
 376
 377                 if (!err) {
 378                         obd->obd_type->typ_refcnt++;
 379                         obd->obd_flags |= OBD_SET_UP;
 380                 }
 381
 382                 GOTO(out, err);
 383         }
 384         case OBD_IOC_CLEANUP: {
 385                 /* have we attached a type to this device? */
 386                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 387                         CERROR("Device %d not attached\n", obd->obd_minor);
 388                         GOTO(out, err=-ENODEV);
 389                 }
 390
 391                 if ( OBT(obd) && OBP(obd, cleanup) )
 392                         err = obd_cleanup(obd);
 393
 394                 if (!err) {
 395                         obd->obd_flags &= ~OBD_SET_UP;
 396                         obd->obd_type->typ_refcnt--;
 397                 }
 398                 GOTO(out, err);
 399         }
 400
 401         case OBD_IOC_CONNECT: {
 402                 obd_data2conn(&conn, data);
 403
 404                 err = obd_connect(&conn, obd, NULL);
 405
 406                 CDEBUG(D_IOCTL, "assigned export %Lx\n", conn.addr);
 407                 obd_conn2data(data, &conn);
 408                 if (err)
 409                         GOTO(out, err);
 410
 411                 err = copy_to_user((int *)arg, data, sizeof(*data));
 412                 GOTO(out, err);
 413         }
 414
 415         case OBD_IOC_DISCONNECT: {
 416                 obd_data2conn(&conn, data);
 417                 err = obd_disconnect(&conn);
 418                 GOTO(out, err);
 419         }
 420
 421         case OBD_IOC_DEC_USE_COUNT: {
 422                 MOD_DEC_USE_COUNT;
 423                 GOTO(out, err=0);
 424         }
 425
 426         case OBD_IOC_CREATE: {
 427                 struct lov_stripe_md *ea;
 428                 obd_data2conn(&conn, data);
 429
 430
 431                 err = obd_create(&conn, &data->ioc_obdo1, &ea);
 432                 if (err)
 433                         GOTO(out, err);
 434
 435                 err = copy_to_user((int *)arg, data, sizeof(*data));
 436                 GOTO(out, err);
 437         }
 438
 439         case OBD_IOC_GETATTR: {
 440
 441                 obd_data2conn(&conn, data);
 442                 err = obd_getattr(&conn, &data->ioc_obdo1, NULL);
 443                 if (err)
 444                         GOTO(out, err);
 445
 446                 err = copy_to_user((int *)arg, data, sizeof(*data));
 447                 GOTO(out, err);
 448         }
 449
 450         case OBD_IOC_SETATTR: {
 451                 obd_data2conn(&conn, data);
 452                 err = obd_setattr(&conn, &data->ioc_obdo1, NULL);
 453                 if (err)
 454                         GOTO(out, err);
 455
 456                 err = copy_to_user((int *)arg, data, sizeof(*data));
 457                 GOTO(out, err);
 458         }
 459
 460         case OBD_IOC_DESTROY: {
 461                 //void *ea;
 462                 obd_data2conn(&conn, data);
 463
 464                 err = obd_destroy(&conn, &data->ioc_obdo1, NULL);
 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                 struct lov_stripe_md smd;
 476                 obd_count       pages = 0;
 477                 struct page     **bufs = NULL;
 478                 obd_size        *counts = NULL;
 479                 obd_off         *offsets = NULL;
 480                 obd_flag        *flags = NULL;
 481                 int             j;
 482                 unsigned long off;
 483                 void *from;
 484
 485                 obd_data2conn(&conn, data);
 486
 487                 pages = data->ioc_plen1 / PAGE_SIZE;
 488
 489                 CDEBUG(D_INODE, "BRW %s with %d pages\n",
 490                        rw == OBD_BRW_READ ? "read" : "write", pages);
 491                 OBD_ALLOC(bufs, pages * sizeof(*bufs));
 492                 OBD_ALLOC(counts, pages * sizeof(*counts));
 493                 OBD_ALLOC(offsets, pages * sizeof(*offsets));
 494                 OBD_ALLOC(flags, pages * sizeof(*flags));
 495                 if (!bufs || !counts || !offsets || !flags) {
 496                         CERROR("no memory for %d BRW per-page data\n", pages);
 497                         GOTO(brw_free, err = -ENOMEM);
 498                 }
 499
 500                 memset(&smd, 0, sizeof(smd));
 501                 smd.lmd_object_id = data->ioc_obdo1.o_id;
 502
 503                 from = (&data->ioc_pbuf1)[0];
 504                 off = data->ioc_offset;
 505
 506                 for (j = 0; j < pages;
 507                      j++, off += PAGE_SIZE, from += PAGE_SIZE) {
 508                         unsigned long to;
 509
 510                         to = __get_free_pages(GFP_KERNEL, 0);
 511                         if (!to) {
 512                                 /*      ||
 513                                         copy_from_user((void
 514                                         *)to,from,PAGE_SIZE))
 515                                         free_pages(to, 0);
 516                                 */
 517                                 CERROR("no memory for brw pages\n");
 518                                 GOTO(brw_cleanup, err = -ENOMEM);
 519                         }
 520                         bufs[j] = virt_to_page(to);
 521                         counts[j] = PAGE_SIZE;
 522                         offsets[j] = off;
 523                         flags[j] = 0;
 524                 }
 525
 526                 err = obd_brw(rw, &conn, &smd, j, bufs, counts, offsets, flags,
 527                               NULL, NULL);
 528
 529                 EXIT;
 530         brw_cleanup:
 531                 for (j = 0; j < pages; j++)
 532                         if (bufs[j] != NULL)
 533                                 __free_pages(bufs[j], 0);
 534         brw_free:
 535                 OBD_FREE(bufs, pages * sizeof(*bufs));
 536                 OBD_FREE(counts, pages * sizeof(*counts));
 537                 OBD_FREE(offsets, pages * sizeof(*offsets));
 538                 OBD_FREE(flags, pages * sizeof(*flags));
 539                 GOTO(out, err);
 540         }
 541         default:
 542                 obd_data2conn(&conn, data);
 543
 544                 err = obd_iocontrol(cmd, &conn, len, data, NULL);
 545                 if (err)
 546                         GOTO(out, err);
 547
 548                 err = copy_to_user((int *)arg, data, len);
 549                 GOTO(out, err);
 550         }
 551
 552  out:
 553         if (buf)
 554                 OBD_FREE(buf, len);
 555         up(&obd_conf_sem);
 556         RETURN(err);
 557 } /* obd_class_ioctl */
 558
 559
 560
 561 /* declare character device */
 562 static struct file_operations obd_psdev_fops = {
 563         ioctl: obd_class_ioctl,       /* ioctl */
 564         open: obd_class_open,        /* open */
 565         release: obd_class_release,     /* release */
 566 };
 567
 568 /* modules setup */
 569 #define OBD_MINOR 241
 570 static struct miscdevice obd_psdev = {
 571         OBD_MINOR,
 572         "obd_psdev",
 573         &obd_psdev_fops
 574 };
 575
 576
 577 EXPORT_SYMBOL(obd_dev);
 578 EXPORT_SYMBOL(obdo_cachep);
 579 EXPORT_SYMBOL(obd_memory);
 580 EXPORT_SYMBOL(obd_fail_loc);
 581
 582 EXPORT_SYMBOL(class_register_type);
 583 EXPORT_SYMBOL(class_unregister_type);
 584 EXPORT_SYMBOL(class_name2dev);
 585 EXPORT_SYMBOL(class_uuid2dev);
 586 EXPORT_SYMBOL(class_uuid2obd);
 587 EXPORT_SYMBOL(class_new_export);
 588 EXPORT_SYMBOL(class_connect);
 589 EXPORT_SYMBOL(class_conn2export);
 590 EXPORT_SYMBOL(class_rconn2export);
 591 EXPORT_SYMBOL(class_conn2obd);
 592 EXPORT_SYMBOL(class_disconnect);
 593 EXPORT_SYMBOL(class_disconnect_all);
 594 //EXPORT_SYMBOL(class_multi_setup);
 595 //EXPORT_SYMBOL(class_multi_cleanup);
 596
 597 static int __init init_obdclass(void)
 598 {
 599         int err;
 600         int i;
 601
 602         printk(KERN_INFO "OBD class driver  v0.9, info@clusterfs.com\n");
 603
 604         sema_init(&obd_conf_sem, 1);
 605         INIT_LIST_HEAD(&obd_types);
 606
 607         if ((err = misc_register(&obd_psdev))) {
 608                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 609                 return err;
 610         }
 611
 612         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 613                 memset(&(obd_dev[i]), 0, sizeof(obd_dev[i]));
 614                 obd_dev[i].obd_minor = i;
 615                 INIT_LIST_HEAD(&obd_dev[i].obd_exports);
 616         }
 617
 618         err = obd_init_caches();
 619         if (err)
 620                 return err;
 621         obd_sysctl_init();
 622         return 0;
 623 }
 624
 625 static void __exit cleanup_obdclass(void)
 626 {
 627         int i;
 628         ENTRY;
 629
 630         misc_deregister(&obd_psdev);
 631         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 632                 struct obd_device *obd = &obd_dev[i];
 633                 if (obd->obd_type && (obd->obd_flags & OBD_SET_UP) &&
 634                     OBT(obd) && OBP(obd, detach)) {
 635                         /* XXX should this call generic detach otherwise? */
 636                         OBP(obd, detach)(obd);
 637                 }
 638         }
 639
 640         obd_cleanup_caches();
 641         obd_sysctl_clean();
 642         CERROR("obd memory leaked: %ld bytes\n", obd_memory);
 643         EXIT;
 644 }
 645
 646 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 647 MODULE_DESCRIPTION("Lustre Class Driver v1.0");
 648 MODULE_LICENSE("GPL");
 649
 650 module_init(init_obdclass);
 651 module_exit(cleanup_obdclass);