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                 type = class_nm_to_type(data->ioc_inlbuf1);
 278                 if (!type) {
 279                         CERROR("OBD: unknown type dev %d\n", obd->obd_minor);
 280                         GOTO(out, err=-EINVAL);
 281                 }
 282
 283                 obd->obd_type = type;
 284                 INIT_LIST_HEAD(&obd->obd_exports);
 285
 286                 /* do the attach */
 287                 if (OBT(obd) && OBP(obd, attach))
 288                         err = OBP(obd,attach)(obd, sizeof(*data), data);
 289                 if (err) {
 290                         obd->obd_type = NULL;
 291                 } else {
 292                         obd->obd_flags |= OBD_ATTACHED;
 293                         type->typ_refcnt++;
 294                         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s\n",
 295                                obd->obd_minor, data->ioc_inlbuf1);
 296                         if (data->ioc_inlbuf2) {
 297                                 int len = strlen(data->ioc_inlbuf2) + 1;
 298                                 OBD_ALLOC(obd->obd_name, len);
 299                                 if (!obd->obd_name) {
 300                                         CERROR("no memory\n");
 301                                         LBUG();
 302                                 }
 303                                 memcpy(obd->obd_name, data->ioc_inlbuf2, len);
 304                                 //obd->obd_proc_entry =
 305                                 //        proc_lustre_register_obd_device(obd);
 306                         } else {
 307                                 CERROR("WARNING: unnamed obd device\n");
 308                                 obd->obd_proc_entry = NULL;
 309                         }
 310
 311                         if (data->ioc_inlbuf3) {
 312                                 int len = strlen(data->ioc_inlbuf3);
 313                                 if (len > 37) {
 314                                         CERROR("uuid should be shorter than 37 bytes\n");
 315                                         if (obd->obd_name)
 316                                                 OBD_FREE(obd->obd_name,
 317                                                          strlen(obd->obd_name) + 1);
 318                                         GOTO(out, err=-EINVAL);
 319                                 }
 320                                 memcpy(obd->obd_uuid, data->ioc_inlbuf3,
 321                                        sizeof(obd->obd_uuid));
 322                         }
 323
 324                         MOD_INC_USE_COUNT;
 325                 }
 326
 327                 GOTO(out, err);
 328         }
 329
 330         case OBD_IOC_DETACH: {
 331                 ENTRY;
 332                 if (obd->obd_flags & OBD_SET_UP) {
 333                         CERROR("OBD device %d still set up\n", obd->obd_minor);
 334                         GOTO(out, err=-EBUSY);
 335                 }
 336                 if (! (obd->obd_flags & OBD_ATTACHED) ) {
 337                         CERROR("OBD device %d not attached\n", obd->obd_minor);
 338                         GOTO(out, err=-ENODEV);
 339                 }
 340                 if ( !list_empty(&obd->obd_exports) ) {
 341                         CERROR("OBD device %d has exports\n",
 342                                obd->obd_minor);
 343                         GOTO(out, err=-EBUSY);
 344                 }
 345
 346                 if (obd->obd_name) {
 347                         OBD_FREE(obd->obd_name, strlen(obd->obd_name)+1);
 348                         obd->obd_name = NULL;
 349                 }
 350
 351                 //if (obd->obd_proc_entry)
 352                   //      proc_lustre_release_obd_device(obd);
 353
 354                 obd->obd_flags &= ~OBD_ATTACHED;
 355                 obd->obd_type->typ_refcnt--;
 356                 obd->obd_type = NULL;
 357                 MOD_DEC_USE_COUNT;
 358                 GOTO(out, err=0);
 359         }
 360
 361         case OBD_IOC_SETUP: {
 362                 /* have we attached a type to this device? */
 363                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 364                         CERROR("Device %d not attached\n", obd->obd_minor);
 365                         GOTO(out, err=-ENODEV);
 366                 }
 367
 368                 /* has this been done already? */
 369                 if ( obd->obd_flags & OBD_SET_UP ) {
 370                         CERROR("Device %d already setup (type %s)\n",
 371                                obd->obd_minor, obd->obd_type->typ_name);
 372                         GOTO(out, err=-EBUSY);
 373                 }
 374
 375                 if ( OBT(obd) && OBP(obd, setup) )
 376                         err = obd_setup(obd, sizeof(*data), data);
 377
 378                 if (!err) {
 379                         obd->obd_type->typ_refcnt++;
 380                         obd->obd_flags |= OBD_SET_UP;
 381                 }
 382
 383                 GOTO(out, err);
 384         }
 385         case OBD_IOC_CLEANUP: {
 386                 /* have we attached a type to this device? */
 387                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 388                         CERROR("Device %d not attached\n", obd->obd_minor);
 389                         GOTO(out, err=-ENODEV);
 390                 }
 391
 392                 if ( OBT(obd) && OBP(obd, cleanup) )
 393                         err = obd_cleanup(obd);
 394
 395                 if (!err) {
 396                         obd->obd_flags &= ~OBD_SET_UP;
 397                         obd->obd_type->typ_refcnt--;
 398                 }
 399                 GOTO(out, err);
 400         }
 401
 402         case OBD_IOC_CONNECT: {
 403                 obd_data2conn(&conn, data);
 404
 405                 err = obd_connect(&conn, obd);
 406
 407                 CDEBUG(D_IOCTL, "assigned export %Lx\n", conn.addr);
 408                 obd_conn2data(data, &conn);
 409                 if (err)
 410                         GOTO(out, err);
 411
 412                 err = copy_to_user((int *)arg, data, sizeof(*data));
 413                 GOTO(out, err);
 414         }
 415
 416         case OBD_IOC_DISCONNECT: {
 417                 obd_data2conn(&conn, data);
 418                 err = obd_disconnect(&conn);
 419                 GOTO(out, err);
 420         }
 421
 422         case OBD_IOC_DEC_USE_COUNT: {
 423                 MOD_DEC_USE_COUNT;
 424                 GOTO(out, err=0);
 425         }
 426
 427         case OBD_IOC_CREATE: {
 428                 struct lov_stripe_md *ea;
 429                 obd_data2conn(&conn, data);
 430
 431
 432                 err = obd_create(&conn, &data->ioc_obdo1, &ea);
 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                 //void *ea;
 463                 obd_data2conn(&conn, data);
 464
 465                 err = obd_destroy(&conn, &data->ioc_obdo1, NULL);
 466                 if (err)
 467                         GOTO(out, err);
 468
 469                 err = copy_to_user((int *)arg, data, sizeof(*data));
 470                 GOTO(out, err);
 471         }
 472
 473         case OBD_IOC_BRW_WRITE:
 474                 rw = OBD_BRW_WRITE;
 475         case OBD_IOC_BRW_READ: {
 476                 struct lov_stripe_md smd;
 477                 obd_count       pages = 0;
 478                 struct page     **bufs = NULL;
 479                 obd_size        *counts = NULL;
 480                 obd_off         *offsets = NULL;
 481                 obd_flag        *flags = NULL;
 482                 int             j;
 483                 unsigned long off;
 484                 void *from;
 485
 486                 obd_data2conn(&conn, data);
 487
 488                 pages = data->ioc_plen1 / PAGE_SIZE;
 489
 490                 CDEBUG(D_INODE, "BRW %s with %d pages\n",
 491                        rw == OBD_BRW_READ ? "read" : "write", pages);
 492                 OBD_ALLOC(bufs, pages * sizeof(*bufs));
 493                 OBD_ALLOC(counts, pages * sizeof(*counts));
 494                 OBD_ALLOC(offsets, pages * sizeof(*offsets));
 495                 OBD_ALLOC(flags, pages * sizeof(*flags));
 496                 if (!bufs || !counts || !offsets || !flags) {
 497                         CERROR("no memory for %d BRW per-page data\n", pages);
 498                         GOTO(brw_free, err = -ENOMEM);
 499                 }
 500
 501                 memset(&smd, 0, sizeof(smd));
 502                 smd.lmd_object_id = data->ioc_obdo1.o_id;
 503
 504                 from = (&data->ioc_pbuf1)[0];
 505                 off = data->ioc_offset;
 506
 507                 for (j = 0; j < pages;
 508                      j++, off += PAGE_SIZE, from += PAGE_SIZE) {
 509                         unsigned long to;
 510
 511                         to = __get_free_pages(GFP_KERNEL, 0);
 512                         if (!to) {
 513                                 /*      ||
 514                                         copy_from_user((void
 515                                         *)to,from,PAGE_SIZE))
 516                                         free_pages(to, 0);
 517                                 */
 518                                 CERROR("no memory for brw pages\n");
 519                                 GOTO(brw_cleanup, err = -ENOMEM);
 520                         }
 521                         bufs[j] = virt_to_page(to);
 522                         counts[j] = PAGE_SIZE;
 523                         offsets[j] = off;
 524                         flags[j] = 0;
 525                 }
 526
 527                 err = obd_brw(rw, &conn, &smd, j, bufs, counts, offsets, flags,
 528                               NULL, NULL);
 529
 530                 EXIT;
 531         brw_cleanup:
 532                 for (j = 0; j < pages; j++)
 533                         if (bufs[j] != NULL)
 534                                 __free_pages(bufs[j], 0);
 535         brw_free:
 536                 OBD_FREE(bufs, pages * sizeof(*bufs));
 537                 OBD_FREE(counts, pages * sizeof(*counts));
 538                 OBD_FREE(offsets, pages * sizeof(*offsets));
 539                 OBD_FREE(flags, pages * sizeof(*flags));
 540                 GOTO(out, err);
 541         }
 542         default:
 543                 obd_data2conn(&conn, data);
 544
 545                 err = obd_iocontrol(cmd, &conn, len, data, NULL);
 546                 if (err)
 547                         GOTO(out, err);
 548
 549                 err = copy_to_user((int *)arg, data, len);
 550                 GOTO(out, err);
 551         }
 552
 553  out:
 554         if (buf)
 555                 OBD_FREE(buf, len);
 556         up(&obd_conf_sem);
 557         RETURN(err);
 558 } /* obd_class_ioctl */
 559
 560
 561
 562 /* declare character device */
 563 static struct file_operations obd_psdev_fops = {
 564         ioctl: obd_class_ioctl,       /* ioctl */
 565         open: obd_class_open,        /* open */
 566         release: obd_class_release,     /* release */
 567 };
 568
 569 /* modules setup */
 570 #define OBD_MINOR 241
 571 static struct miscdevice obd_psdev = {
 572         OBD_MINOR,
 573         "obd_psdev",
 574         &obd_psdev_fops
 575 };
 576
 577
 578 EXPORT_SYMBOL(obd_dev);
 579 EXPORT_SYMBOL(obdo_cachep);
 580 EXPORT_SYMBOL(obd_memory);
 581 EXPORT_SYMBOL(obd_fail_loc);
 582
 583 EXPORT_SYMBOL(class_register_type);
 584 EXPORT_SYMBOL(class_unregister_type);
 585 EXPORT_SYMBOL(class_name2dev);
 586 EXPORT_SYMBOL(class_uuid2dev);
 587 EXPORT_SYMBOL(class_uuid2obd);
 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_multi_setup);
 594 //EXPORT_SYMBOL(class_multi_cleanup);
 595
 596 static int __init init_obdclass(void)
 597 {
 598         int err;
 599         int i;
 600
 601         printk(KERN_INFO "OBD class driver  v0.9, info@clusterfs.com\n");
 602
 603         sema_init(&obd_conf_sem, 1);
 604         INIT_LIST_HEAD(&obd_types);
 605
 606         if ((err = misc_register(&obd_psdev))) {
 607                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 608                 return err;
 609         }
 610
 611         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 612                 memset(&(obd_dev[i]), 0, sizeof(obd_dev[i]));
 613                 obd_dev[i].obd_minor = i;
 614                 INIT_LIST_HEAD(&obd_dev[i].obd_exports);
 615         }
 616
 617         err = obd_init_caches();
 618         if (err)
 619                 return err;
 620         obd_sysctl_init();
 621         return 0;
 622 }
 623
 624 static void __exit cleanup_obdclass(void)
 625 {
 626         int i;
 627         ENTRY;
 628
 629         misc_deregister(&obd_psdev);
 630         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 631                 struct obd_device *obd = &obd_dev[i];
 632                 if (obd->obd_type && (obd->obd_flags & OBD_SET_UP) &&
 633                     OBT(obd) && OBP(obd, detach)) {
 634                         /* XXX should this call generic detach otherwise? */
 635                         OBP(obd, detach)(obd);
 636                 }
 637         }
 638
 639         obd_cleanup_caches();
 640         obd_sysctl_clean();
 641         CERROR("obd memory leaked: %ld bytes\n", obd_memory);
 642         EXIT;
 643 }
 644
 645 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 646 MODULE_DESCRIPTION("Lustre Class Driver v1.0");
 647 MODULE_LICENSE("GPL");
 648
 649 module_init(init_obdclass);
 650 module_exit(cleanup_obdclass);