lustre/obdclass/class_obd.c

   1 /*
   2  *              An implementation of a loadable kernel mode driver providing
   3  *              multiple kernel/user space bidirectional communications links.
   4  *
   5  *              Author:         Alan Cox <alan@cymru.net>
   6  *
   7  *              This program is free software; you can redistribute it and/or
   8  *              modify it under the terms of the GNU General Public License
   9  *              as published by the Free Software Foundation; either version
  10  *              2 of the License, or (at your option) any later version.
  11  *
  12  *              Adapted to become the Linux 2.0 Coda pseudo device
  13  *              Peter  Braam  <braam@maths.ox.ac.uk>
  14  *              Michael Callahan <mjc@emmy.smith.edu>
  15  *
  16  *              Changes for Linux 2.1
  17  *              Copyright (c) 1997 Carnegie-Mellon University
  18  *
  19  *              Redone again for Intermezzo
  20  *              Copyright (c) 1998 Peter J. Braam
  21  *
  22  *              Hacked up again for simulated OBD
  23  *              Copyright (c) 1999 Stelias Computing, Inc.
  24  *                (authors {pschwan,braam}@stelias.com)
  25  *              Copyright (C) 1999 Seagate Technology, Inc.
  26  *
  27  *
  28  */
  29
  30 #define EXPORT_SYMTAB
  31
  32 #include <linux/config.h> /* for CONFIG_PROC_FS */
  33 #include <linux/module.h>
  34 #include <linux/errno.h>
  35 #include <linux/kernel.h>
  36 #include <linux/major.h>
  37 #include <linux/sched.h>
  38 #include <linux/lp.h>
  39 #include <linux/malloc.h>
  40 #include <linux/ioport.h>
  41 #include <linux/fcntl.h>
  42 #include <linux/delay.h>
  43 #include <linux/skbuff.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/vmalloc.h>
  46 #include <linux/fs.h>
  47 #include <linux/poll.h>
  48 #include <linux/init.h>
  49 #include <linux/list.h>
  50 #include <asm/io.h>
  51 #include <asm/segment.h>
  52 #include <asm/system.h>
  53 #include <asm/poll.h>
  54 #include <asm/uaccess.h>
  55
  56 #include <linux/obd_support.h>
  57 #include <linux/obd_class.h>
  58
  59 int           obd_print_entry = 1;
  60 int           obd_debug_level = 4095;
  61 struct obd_device obd_dev[MAX_OBD_DEVICES];
  62 struct list_head obd_types;
  63
  64 /* called when opening /dev/obdNNN */
  65 static int obd_class_open(struct inode * inode, struct file * file)
  66 {
  67         int dev;
  68         ENTRY;
  69
  70         if (!inode)
  71                 return -EINVAL;
  72         dev = MINOR(inode->i_rdev);
  73         if (dev >= MAX_OBD_DEVICES)
  74                 return -ENODEV;
  75         obd_dev[dev].obd_refcnt++;
  76         CDEBUG(D_PSDEV, "Refcount now %d\n", obd_dev[dev].obd_refcnt++);
  77
  78         MOD_INC_USE_COUNT;
  79         EXIT;
  80         return 0;
  81 }
  82
  83 /* called when closing /dev/obdNNN */
  84 static int obd_class_release(struct inode * inode, struct file * file)
  85 {
  86         int dev;
  87         ENTRY;
  88
  89         if (!inode)
  90                 return -EINVAL;
  91         dev = MINOR(inode->i_rdev);
  92         if (dev >= MAX_OBD_DEVICES)
  93                 return -ENODEV;
  94         fsync_dev(inode->i_rdev);
  95         if (obd_dev[dev].obd_refcnt <= 0)
  96                 printk(KERN_ALERT "presto_psdev_release: refcount(%d) <= 0\n",
  97                        obd_dev[dev].obd_refcnt);
  98         obd_dev[dev].obd_refcnt--;
  99
 100         CDEBUG(D_PSDEV, "Refcount now %d\n", obd_dev[dev].obd_refcnt++);
 101
 102         MOD_DEC_USE_COUNT;
 103
 104         EXIT;
 105         return 0;
 106 }
 107
 108 /* support function */
 109 static struct obd_type *obd_nm_to_type(char *nm)
 110 {
 111         struct list_head *tmp;
 112         struct obd_type *type;
 113
 114         tmp = &obd_types;
 115         while ( (tmp = tmp->next) != &obd_types ) {
 116                 type = list_entry(tmp, struct obd_type, typ_chain);
 117                 if (strlen(type->typ_name) == strlen(nm) &&
 118                     strcmp(type->typ_name, nm) == 0 ) {
 119                         return type;
 120                 }
 121         }
 122         return NULL;
 123 }
 124
 125
 126 static int getdata(int len, void **data)
 127 {
 128         void *tmp = NULL;
 129
 130         if (!len)
 131                 return 0;
 132
 133         OBD_ALLOC(tmp, void *, len);
 134         if ( !tmp )
 135                 return -ENOMEM;
 136
 137         memset(tmp, 0, len);
 138         if ( copy_from_user(tmp, *data, len)) {
 139                 OBD_FREE(tmp,len);
 140                 return -EFAULT;
 141         }
 142         *data = tmp;
 143
 144         return 0;
 145 }
 146
 147 /* to control /dev/obdNNN */
 148 static int obd_class_ioctl (struct inode * inode, struct file * filp,
 149                             unsigned int cmd, unsigned long arg)
 150 {
 151         int err, i_ino, dev;
 152         struct obd_device *obddev;
 153         struct oic_rw_s rw_s; /* read, write */
 154         long int cli_id; /* connect, disconnect */
 155
 156         struct oic_prealloc_s prealloc; /* preallocate */
 157
 158         if (!inode)
 159                 return -EINVAL;
 160
 161         dev = MINOR(inode->i_rdev);
 162         if (dev > MAX_OBD_DEVICES)
 163                 return -ENODEV;
 164         obddev = &obd_dev[dev];
 165
 166         switch (cmd) {
 167         case OBD_IOC_ATTACH: {
 168                 struct obd_type *type;
 169                 struct oic_attach input;
 170
 171                 /* have we attached a type to this device */
 172                 if ( obddev->obd_type || (obddev->obd_flags & OBD_ATTACHED) ){
 173                         CDEBUG(D_IOCTL, "OBD Device %d already attached to type %s.\n", dev, obddev->obd_type->typ_name);
 174                         return -EINVAL;
 175                 }
 176
 177                 /* get data structures */
 178                 err = copy_from_user(&input, (void *) arg, sizeof(input));
 179                 if (err)
 180                         return err;
 181
 182                 if ( (err = getdata(input.att_typelen + 1, &input.att_type)) )
 183                         return err;
 184
 185                 /* find the type */
 186                 err = -EINVAL;
 187                 type = obd_nm_to_type(input.att_type);
 188                 OBD_FREE(input.att_type, input.att_typelen + 1);
 189                 if ( !type ) {
 190                         printk("Unknown obd type dev %d\n", dev);
 191                         return err;
 192                 }
 193                 obddev->obd_type = type;
 194
 195                 /* get the attach data */
 196                 if ( (err = getdata(input.att_datalen, &input.att_data)) ) {
 197                         return err;
 198                 }
 199
 200                 CDEBUG(D_IOCTL, "Attach %d, type %s\n",
 201                        dev, obddev->obd_type->typ_name);
 202                 if (!obddev->obd_type->typ_ops ||
 203                     !obddev->obd_type->typ_ops->o_attach ) {
 204                         obddev->obd_flags |=  OBD_ATTACHED;
 205                         type->typ_refcnt++;
 206                         MOD_INC_USE_COUNT;
 207                         return 0;
 208                 }
 209
 210                 /* do the attach */
 211                 err = obddev->obd_type->typ_ops->o_attach
 212                         (obddev,  input.att_datalen, &input.att_data);
 213                 OBD_FREE(input.att_data, input.att_datalen);
 214
 215                 if ( err ) {
 216                         obddev->obd_flags &= ~OBD_ATTACHED;
 217                         obddev->obd_type = NULL;
 218                 } else {
 219                         obddev->obd_flags |=  OBD_ATTACHED;
 220                         type->typ_refcnt++;
 221                         MOD_INC_USE_COUNT;
 222                 }
 223                 return err;
 224         }
 225         case OBD_IOC_FORMAT: {
 226                 struct ioc_format {
 227                         int format_datalen;
 228                         void *format_data;
 229                 } input;
 230
 231                 /* have we attached a type to this device */
 232                 if ( !obddev->obd_type ) {
 233                         CDEBUG(D_IOCTL, "OBD Device %d has no type.\n", dev);
 234                         return -EINVAL;
 235                 }
 236
 237                 /* get main structure */
 238                 err = copy_from_user(&input, (void *) arg, sizeof(input));
 239                 if (err)
 240                         return err;
 241
 242                 err = getdata(input.format_datalen, &input.format_data);
 243                 if (err)
 244                         return err;
 245
 246                 if (!obddev->obd_type->typ_ops ||
 247                     !obddev->obd_type->typ_ops->o_format )
 248                         return -EOPNOTSUPP;
 249
 250                 /* do the format */
 251                 CDEBUG(D_IOCTL, "Format %d, type %s\n", dev,
 252                        obddev->obd_type->typ_name);
 253                 err = obddev->obd_type->typ_ops->o_format
 254                         (obddev, input.format_datalen, input.format_data);
 255
 256                 OBD_FREE(input.format_data, input.format_datalen);
 257                 return err;
 258         }
 259         case OBD_IOC_PARTITION: {
 260                 struct ioc_part {
 261                         int part_datalen;
 262                         void *part_data;
 263                 } input;
 264
 265                 /* have we attached a type to this device */
 266                 if ( !obddev->obd_type ) {
 267                         CDEBUG(D_IOCTL, "OBD Device %d has no type.\n", dev);
 268                         return -EINVAL;
 269                 }
 270
 271                 /* get main structure */
 272                 err = copy_from_user(&input, (void *) arg, sizeof(input));
 273                 if (err)
 274                         return err;
 275
 276                 err = getdata(input.part_datalen, &input.part_data);
 277                 if (err)
 278                         return err;
 279
 280                 if (!obddev->obd_type->typ_ops ||
 281                     !obddev->obd_type->typ_ops->o_partition )
 282                         return -EOPNOTSUPP;
 283
 284                 /* do the partition */
 285                 CDEBUG(D_IOCTL, "Partition %d, type %s\n", dev,
 286                        obddev->obd_type->typ_name);
 287                 err = obddev->obd_type->typ_ops->o_partition
 288                         (obddev, input.part_datalen, input.part_data);
 289
 290                 OBD_FREE(input.part_data, input.part_datalen);
 291                 return err;
 292         }
 293         case OBD_IOC_SETUP_OBDDEV: {
 294                 struct ioc_setup {
 295                         int setup_datalen;
 296                         void *setup_data;
 297                 } input;
 298
 299                 /* have we attached a type to this device */
 300                 if (!(obddev->obd_flags & OBD_ATTACHED)) {
 301                         CDEBUG(D_IOCTL, "OBD Device %d has no type.\n", dev);
 302                         return -EINVAL;
 303                 }
 304
 305                 /* has this been done already? */
 306                 if ( obddev->obd_flags & OBD_SET_UP ) {
 307                         CDEBUG(D_IOCTL, "Device %d already setup (type %s)\n",
 308                                dev, obddev->obd_type->typ_name);
 309                         return -EINVAL;
 310                 }
 311
 312                 /* get main structure */
 313                 err = copy_from_user(&input, (void *) arg, sizeof(input));
 314                 if (err)
 315                         return err;
 316
 317                 err = getdata(input.setup_datalen, &input.setup_data);
 318                 if (err)
 319                         return err;
 320
 321                 /* do the setup */
 322                 CDEBUG(D_IOCTL, "Setup %d, type %s\n", dev,
 323                        obddev->obd_type->typ_name);
 324                 if ( !obddev->obd_type->typ_ops ||
 325                      !obddev->obd_type->typ_ops->o_setup )
 326                         return -EOPNOTSUPP;
 327
 328                 err = obddev->obd_type->typ_ops->o_setup
 329                         (obddev, input.setup_datalen, input.setup_data);
 330
 331                 if ( err )
 332                         obddev->obd_flags &= ~OBD_SET_UP;
 333                 else
 334                         obddev->obd_flags |= OBD_SET_UP;
 335                 return err;
 336         }
 337         case OBD_IOC_CLEANUP_OBDDEV: {
 338                 int rc;
 339
 340                 /* has this minor been registered? */
 341                 if (!obddev->obd_type)
 342                         return -ENODEV;
 343
 344                 if ( !obddev->obd_type->typ_refcnt )
 345                         printk("OBD_CLEANUP: refcount wrap!\n");
 346
 347                 if ( !obddev->obd_type->typ_ops->o_cleanup )
 348                         goto cleanup_out;
 349
 350                 /* cleanup has no argument */
 351                 rc = obddev->obd_type->typ_ops->o_cleanup(obddev);
 352                 if ( rc )
 353                         return rc;
 354
 355         cleanup_out:
 356                 obddev->obd_flags = 0;
 357                 obddev->obd_type->typ_refcnt--;
 358                 obddev->obd_type = NULL;
 359                 MOD_DEC_USE_COUNT;
 360                 return 0;
 361         }
 362         case OBD_IOC_CONNECT:
 363         {
 364                 struct obd_conn_info conninfo;
 365
 366                 if ( (!(obddev->obd_flags & OBD_SET_UP)) ||
 367                      (!(obddev->obd_flags & OBD_ATTACHED))) {
 368                         CDEBUG(D_IOCTL, "Device not attached or set up\n");
 369                         return -EINVAL;
 370                 }
 371
 372                 if (obddev->obd_type->typ_ops->o_connect(obddev, &conninfo))
 373                         return -EINVAL;
 374
 375                 return copy_to_user((int *)arg, &conninfo,
 376                                     sizeof(struct obd_conn_info));
 377         }
 378         case OBD_IOC_DISCONNECT:
 379                 /* frees data structures */
 380                 /* has this minor been registered? */
 381                 if (!obddev->obd_type)
 382                         return -ENODEV;
 383
 384                 get_user(cli_id, (int *) arg);
 385
 386                 obddev->obd_type->typ_ops->o_disconnect(cli_id);
 387                 return 0;
 388
 389         case OBD_IOC_SYNC:
 390                 /* sync doesn't need a connection ID, because it knows
 391                  * what device it was called on, and can thus get the
 392                  * superblock that it needs. */
 393                 /* has this minor been registered? */
 394                 if (!obddev->obd_type)
 395                         return -ENODEV;
 396
 397                 if (!obddev->u.sim.sim_sb || !obddev->u.sim.sim_sb->s_dev) {
 398                         CDEBUG(D_IOCTL, "fatal: device not initialized.\n");
 399                         err = -EINVAL;
 400                 } else {
 401                         if ((err = fsync_dev(obddev->u.sim.sim_sb->s_dev)))
 402                                 CDEBUG(D_IOCTL, "sync: fsync_dev failure\n");
 403                         else
 404                                 CDEBUG(D_IOCTL, "sync: success\n");
 405                 }
 406
 407                 return put_user(err, (int *) arg);
 408         case OBD_IOC_CREATE:
 409                 /* similarly, create doesn't need a connection ID for
 410                  * the same reasons. */
 411
 412                 /* has this minor been registered? */
 413                 if (!obddev->obd_type)
 414                         return -ENODEV;
 415
 416
 417                 if (!obddev->u.sim.sim_sb) {
 418                         CDEBUG(D_IOCTL, "fatal: device not initialized.\n");
 419                         return put_user(-EINVAL, (int *) arg);
 420                 }
 421
 422                 i_ino = obddev->obd_type->typ_ops->o_create(obddev, 0, &err);
 423                 if (err) {
 424                         CDEBUG(D_IOCTL, "create: obd_inode_new failure\n");
 425                         /* 0 is the only error value */
 426                         return put_user(0, (int *) arg);
 427                 }
 428
 429                 return put_user(i_ino, (int *) arg);
 430         case OBD_IOC_DESTROY:
 431         {
 432                 struct destroy_s {
 433                         unsigned int conn_id;
 434                         unsigned int ino;
 435                 } destroy;
 436
 437                 /* has this minor been registered? */
 438                 if (!obddev->obd_type)
 439                         return -ENODEV;
 440
 441
 442                 copy_from_user(&destroy, (int *)arg, sizeof(struct destroy_s));
 443                 if ( !obddev->obd_type ||
 444                      !obddev->obd_type->typ_ops->o_destroy)
 445                         return -EINVAL;
 446
 447                 return obddev->obd_type->typ_ops->o_destroy(destroy.conn_id, destroy.ino);
 448         }
 449         case OBD_IOC_SETATTR:
 450         {
 451                 int err;
 452                 struct tmp {
 453                         unsigned int conn_id;
 454                         unsigned long ino;
 455                         struct iattr iattr;
 456                 } foo;
 457                 struct inode holder;
 458                 /* has this minor been registered? */
 459                 if (!obddev->obd_type)
 460                         return -ENODEV;
 461
 462
 463                 err= copy_from_user(&foo, (int *)arg, sizeof(struct tmp));
 464                 if (err)
 465                         return err;
 466
 467                 if ( !obddev->obd_type ||
 468                      !obddev->obd_type->typ_ops->o_setattr)
 469                         return -EINVAL;
 470
 471                 inode_setattr(&holder, &foo.iattr);
 472                 return obddev->obd_type->typ_ops->o_setattr(foo.conn_id, foo.ino, &holder);
 473         }
 474
 475         case OBD_IOC_GETATTR:
 476         {
 477                 int err;
 478                 struct tmp {
 479                         unsigned int conn_id;
 480                         unsigned long ino;
 481                 } foo;
 482                 struct iattr iattr;
 483                 struct inode holder;
 484                 copy_from_user(&foo, (int *)arg, sizeof(struct tmp));
 485
 486                 if ( !obddev->obd_type ||
 487                      !obddev->obd_type->typ_ops->o_getattr)
 488                         return -EINVAL;
 489
 490                 if (obddev->obd_type->typ_ops->o_getattr(foo.conn_id,
 491                                                          foo.ino, &holder))
 492                         return -EINVAL;
 493
 494                 inode_to_iattr(&holder, &iattr);
 495                 err = copy_to_user((int *)arg, &iattr, sizeof(iattr));
 496                 return err;
 497         }
 498
 499         case OBD_IOC_READ2:
 500         {
 501                 int err;
 502
 503                 /* has this minor been registered? */
 504                 if (!obddev->obd_type)
 505                         return -ENODEV;
 506
 507                 err = copy_from_user(&rw_s, (int *)arg, sizeof(struct oic_rw_s));
 508                 if ( err )
 509                         return err;
 510
 511                 if ( !obddev->obd_type->typ_ops ||
 512                      !obddev->obd_type->typ_ops->o_read )
 513                         return -EINVAL;
 514
 515                 rw_s.count = obddev->obd_type->typ_ops->o_read2(rw_s.conn_id,
 516                                        rw_s.inode,
 517                                        rw_s.buf,
 518                                        rw_s.count,
 519                                        rw_s.offset,
 520                                        &err);
 521                 if ( err )
 522                         return err;
 523
 524                 err = copy_to_user((int*)arg, &rw_s.count,
 525                                    sizeof(unsigned long));
 526                 return err;
 527         }
 528
 529
 530         case OBD_IOC_READ:
 531         {
 532                 int err;
 533                 /* has this minor been registered? */
 534                 if (!obddev->obd_type)
 535                         return -ENODEV;
 536
 537
 538                 err = copy_from_user(&rw_s, (int *)arg, sizeof(struct oic_rw_s));
 539                 if ( err )
 540                         return err;
 541
 542                 if ( !obddev->obd_type->typ_ops ||
 543                      !obddev->obd_type->typ_ops->o_read )
 544                         return -EINVAL;
 545
 546                 rw_s.count = obddev->obd_type->typ_ops->o_read(rw_s.conn_id,
 547                                                                rw_s.inode,
 548                                                                rw_s.buf,
 549                                                                rw_s.count,
 550                                                                rw_s.offset,
 551                                                                &err);
 552                 if ( err )
 553                         return err;
 554
 555                 err = copy_to_user((int*)arg, &rw_s.count,
 556                                    sizeof(unsigned long));
 557                 return err;
 558         }
 559
 560         case OBD_IOC_WRITE:
 561         {
 562                 int err;
 563                 /* has this minor been registered? */
 564                 if (!obddev->obd_type)
 565                         return -ENODEV;
 566
 567
 568                 copy_from_user(&rw_s, (int *)arg, sizeof(struct oic_rw_s));
 569                 CDEBUG(D_IOCTL, "\n");
 570                 if ( !obddev->obd_type->typ_ops->o_write )
 571                         return -EINVAL;
 572                 rw_s.count =
 573                         obddev->obd_type->typ_ops->o_write(rw_s.conn_id,
 574                                                            rw_s.inode,
 575                                                            rw_s.buf,
 576                                                            rw_s.count,
 577                                                            rw_s.offset,
 578                                                            &err);
 579
 580                 printk("Result rw_s.count %ld\n", rw_s.count);
 581                 return (int)rw_s.count;
 582                 copy_to_user((int *)arg, &rw_s.count,
 583                              sizeof(unsigned long));
 584                 return err;
 585         }
 586         case OBD_IOC_PREALLOCATE:
 587                 /* has this minor been registered? */
 588                 if (!obddev->obd_type)
 589                         return -ENODEV;
 590
 591
 592                 copy_from_user(&prealloc, (int *)arg,
 593                                sizeof(struct oic_prealloc_s));
 594
 595                 if (!obddev->u.sim.sim_sb || !obddev->u.sim.sim_sb->s_dev) {
 596                         CDEBUG(D_IOCTL, "fatal: device not initialized.\n");
 597                         return -EINVAL;
 598                 }
 599
 600                 if (!obddev->obd_type ||
 601                     !obddev->obd_type->typ_ops->o_preallocate)
 602                         return -EINVAL;
 603
 604                 prealloc.alloc =
 605                         obddev->obd_type->typ_ops->o_preallocate(prealloc.cli_id, prealloc.alloc,
 606                                                prealloc.inodes, &err);
 607                 if ( err )
 608                         return err;
 609                 return copy_to_user((int *)arg, &prealloc,
 610                                     sizeof(struct oic_prealloc_s));
 611         case OBD_IOC_STATFS:
 612         {
 613                 struct statfs *tmp;
 614                 unsigned int conn_id;
 615                 struct statfs buf;
 616                 int rc;
 617
 618                 /* has this minor been registered? */
 619                 if (!obddev->obd_type)
 620                         return -ENODEV;
 621
 622                 tmp = (void *)arg + sizeof(unsigned int);
 623                 get_user(conn_id, (int *) arg);
 624                 if ( !obddev->obd_type ||
 625                      !obddev->obd_type->typ_ops->o_statfs)
 626                         return -EINVAL;
 627
 628                 rc = obddev->obd_type->typ_ops->o_statfs(conn_id, &buf);
 629                 if ( rc )
 630                         return rc;
 631                 rc = copy_to_user(tmp, &buf, sizeof(buf));
 632                 return rc;
 633
 634         }
 635         default:
 636                 printk("invalid ioctl: cmd = %x, arg = %lx\n", cmd, arg);
 637                 return -ENOTTY;
 638         }
 639 }
 640
 641 /* Driver interface done, utility functions follow */
 642
 643 int obd_register_type(struct obd_ops *ops, char *nm)
 644 {
 645         struct obd_type *type;
 646
 647         if  ( obd_nm_to_type(nm) ) {
 648                 CDEBUG(D_IOCTL, "Type %s already registered\n", nm);
 649                 return -1;
 650         }
 651
 652         OBD_ALLOC(type, struct obd_type * , sizeof(*type));
 653         if ( !type )
 654                 return -ENOMEM;
 655         memset(type, 0, sizeof(*type));
 656         INIT_LIST_HEAD(&type->typ_chain);
 657
 658         list_add(&type->typ_chain, obd_types.next);
 659         type->typ_ops = ops;
 660         type->typ_name = nm;
 661         return 0;
 662 }
 663
 664 int obd_unregister_type(char *nm)
 665 {
 666         struct obd_type *type = obd_nm_to_type(nm);
 667
 668         if ( !type )
 669                 return -1;
 670
 671         if ( type->typ_refcnt )
 672                 return -1;
 673
 674         list_del(&type->typ_chain);
 675         OBD_FREE(type, sizeof(*type));
 676         return 0;
 677 }
 678
 679 /* declare character device */
 680 static struct file_operations obd_psdev_fops = {
 681         NULL,                  /* llseek */
 682         NULL,                  /* read */
 683         NULL,                  /* write */
 684         NULL,                  /* presto_psdev_readdir */
 685         NULL,                  /* poll */
 686         obd_class_ioctl,       /* ioctl */
 687         NULL,                  /* presto_psdev_mmap */
 688         obd_class_open,        /* open */
 689         NULL,
 690         obd_class_release,     /* release */
 691         NULL,                  /* fsync */
 692         NULL,                  /* fasync */
 693         NULL,                  /* check_media_change */
 694         NULL,                  /* revalidate */
 695         NULL                   /* lock */
 696 };
 697
 698
 699 /* modules setup */
 700
 701 int init_obd(void)
 702 {
 703         int i;
 704
 705         printk(KERN_INFO "OBD class driver  v0.002, braam@stelias.com\n");
 706
 707         INIT_LIST_HEAD(&obd_types);
 708
 709         if (register_chrdev(OBD_PSDEV_MAJOR,"obd_psdev",
 710                             &obd_psdev_fops)) {
 711                 printk(KERN_ERR "obd_psdev: unable to get major %d\n",
 712                        OBD_PSDEV_MAJOR);
 713                 return -EIO;
 714         }
 715
 716         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 717                 memset(&(obd_dev[i]), 0, sizeof(obd_dev[i]));
 718                 INIT_LIST_HEAD(&obd_dev[i].u.sim.sim_clients);
 719         }
 720
 721         obd_sysctl_init();
 722
 723         return 0;
 724 }
 725
 726 EXPORT_SYMBOL(obd_register_type);
 727 EXPORT_SYMBOL(obd_unregister_type);
 728
 729 EXPORT_SYMBOL(obd_print_entry);
 730 EXPORT_SYMBOL(obd_debug_level);
 731 EXPORT_SYMBOL(obd_dev);
 732
 733 #ifdef MODULE
 734 int init_module(void)
 735 {
 736         return init_obd();
 737 }
 738
 739 void cleanup_module(void)
 740 {
 741         int i;
 742         ENTRY;
 743
 744         unregister_chrdev(OBD_PSDEV_MAJOR, "obd_psdev");
 745         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 746                 struct obd_device *obddev = &obd_dev[i];
 747                 if ( obddev->obd_type &&
 748                      obddev->obd_type->typ_ops->o_cleanup_device )
 749                         return obddev->obd_type->typ_ops->o_cleanup_device(i);
 750         }
 751
 752         obd_sysctl_clean();
 753 }
 754 #endif