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 || !OBP(obddev,attach)) {
 203                         obddev->obd_flags |=  OBD_ATTACHED;
 204                         type->typ_refcnt++;
 205                         MOD_INC_USE_COUNT;
 206                         return 0;
 207                 }
 208
 209                 /* do the attach */
 210                 err = OBP(obddev,attach)(obddev,
 211                                          input.att_datalen, &input.att_data);
 212                 OBD_FREE(input.att_data, input.att_datalen);
 213
 214                 if ( err ) {
 215                         obddev->obd_flags &= ~OBD_ATTACHED;
 216                         obddev->obd_type = NULL;
 217                 } else {
 218                         obddev->obd_flags |=  OBD_ATTACHED;
 219                         type->typ_refcnt++;
 220                         MOD_INC_USE_COUNT;
 221                 }
 222                 return err;
 223         }
 224         case OBD_IOC_FORMAT: {
 225                 struct ioc_format {
 226                         int format_datalen;
 227                         void *format_data;
 228                 } input;
 229
 230                 /* have we attached a type to this device */
 231                 if ( !obddev->obd_type ) {
 232                         CDEBUG(D_IOCTL, "OBD Device %d has no type.\n", dev);
 233                         return -EINVAL;
 234                 }
 235
 236                 /* get main structure */
 237                 err = copy_from_user(&input, (void *) arg, sizeof(input));
 238                 if (err)
 239                         return err;
 240
 241                 err = getdata(input.format_datalen, &input.format_data);
 242                 if (err)
 243                         return err;
 244
 245                 if (!obddev->obd_type->typ_ops ||
 246                     !obddev->obd_type->typ_ops->o_format )
 247                         return -EOPNOTSUPP;
 248
 249                 /* do the format */
 250                 CDEBUG(D_IOCTL, "Format %d, type %s\n", dev,
 251                        obddev->obd_type->typ_name);
 252                 err = obddev->obd_type->typ_ops->o_format
 253                         (obddev, input.format_datalen, input.format_data);
 254
 255                 OBD_FREE(input.format_data, input.format_datalen);
 256                 return err;
 257         }
 258         case OBD_IOC_PARTITION: {
 259                 struct ioc_part {
 260                         int part_datalen;
 261                         void *part_data;
 262                 } input;
 263
 264                 /* have we attached a type to this device */
 265                 if ( !obddev->obd_type ) {
 266                         CDEBUG(D_IOCTL, "OBD Device %d has no type.\n", dev);
 267                         return -EINVAL;
 268                 }
 269
 270                 /* get main structure */
 271                 err = copy_from_user(&input, (void *) arg, sizeof(input));
 272                 if (err)
 273                         return err;
 274
 275                 err = getdata(input.part_datalen, &input.part_data);
 276                 if (err)
 277                         return err;
 278
 279                 if (!obddev->obd_type->typ_ops ||
 280                     !obddev->obd_type->typ_ops->o_partition )
 281                         return -EOPNOTSUPP;
 282
 283                 /* do the partition */
 284                 CDEBUG(D_IOCTL, "Partition %d, type %s\n", dev,
 285                        obddev->obd_type->typ_name);
 286                 err = obddev->obd_type->typ_ops->o_partition
 287                         (obddev, input.part_datalen, input.part_data);
 288
 289                 OBD_FREE(input.part_data, input.part_datalen);
 290                 return err;
 291         }
 292         case OBD_IOC_SETUP_OBDDEV: {
 293                 struct ioc_setup {
 294                         int setup_datalen;
 295                         void *setup_data;
 296                 } input;
 297
 298                 /* have we attached a type to this device */
 299                 if (!(obddev->obd_flags & OBD_ATTACHED)) {
 300                         CDEBUG(D_IOCTL, "OBD Device %d has no type.\n", dev);
 301                         return -EINVAL;
 302                 }
 303
 304                 /* has this been done already? */
 305                 if ( obddev->obd_flags & OBD_SET_UP ) {
 306                         CDEBUG(D_IOCTL, "Device %d already setup (type %s)\n",
 307                                dev, obddev->obd_type->typ_name);
 308                         return -EINVAL;
 309                 }
 310
 311                 /* get main structure */
 312                 err = copy_from_user(&input, (void *) arg, sizeof(input));
 313                 if (err)
 314                         return err;
 315
 316                 err = getdata(input.setup_datalen, &input.setup_data);
 317                 if (err)
 318                         return err;
 319
 320                 /* do the setup */
 321                 CDEBUG(D_IOCTL, "Setup %d, type %s\n", dev,
 322                        obddev->obd_type->typ_name);
 323                 if ( !obddev->obd_type->typ_ops ||
 324                      !obddev->obd_type->typ_ops->o_setup ) {
 325                         obddev->obd_flags |= OBD_SET_UP;
 326                         return 0;
 327                 }
 328
 329                 err = obddev->obd_type->typ_ops->o_setup
 330                         (obddev, input.setup_datalen, input.setup_data);
 331
 332                 if ( err )
 333                         obddev->obd_flags &= ~OBD_SET_UP;
 334                 else
 335                         obddev->obd_flags |= OBD_SET_UP;
 336                 return err;
 337         }
 338         case OBD_IOC_CLEANUP: {
 339                 int rc;
 340
 341                 /* has this minor been registered? */
 342                 if (!obddev->obd_type)
 343                         return -ENODEV;
 344
 345                 if ( !obddev->obd_type->typ_refcnt )
 346                         printk("OBD_CLEANUP: refcount wrap!\n");
 347
 348                 if ( !obddev->obd_type->typ_ops->o_cleanup )
 349                         goto cleanup_out;
 350
 351                 /* cleanup has no argument */
 352                 rc = OBP(obddev, cleanup)(obddev);
 353                 if ( rc )
 354                         return rc;
 355
 356         cleanup_out:
 357                 obddev->obd_flags = 0;
 358                 obddev->obd_type->typ_refcnt--;
 359                 obddev->obd_type = NULL;
 360                 MOD_DEC_USE_COUNT;
 361                 return 0;
 362         }
 363         case OBD_IOC_CONNECT:
 364         {
 365                 struct obd_conn_info conninfo;
 366
 367                 if ( (!(obddev->obd_flags & OBD_SET_UP)) ||
 368                      (!(obddev->obd_flags & OBD_ATTACHED))) {
 369                         CDEBUG(D_IOCTL, "Device not attached or set up\n");
 370                         return -EINVAL;
 371                 }
 372
 373                 if (obddev->obd_type->typ_ops->o_connect(obddev, &conninfo))
 374                         return -EINVAL;
 375
 376                 return copy_to_user((int *)arg, &conninfo,
 377                                     sizeof(struct obd_conn_info));
 378         }
 379         case OBD_IOC_DISCONNECT:
 380                 /* frees data structures */
 381                 /* has this minor been registered? */
 382                 if (!obddev->obd_type)
 383                         return -ENODEV;
 384
 385                 get_user(cli_id, (int *) arg);
 386
 387                 OBP(obddev, disconnect)(cli_id);
 388                 return 0;
 389
 390         case OBD_IOC_SYNC: {
 391                 /* sync doesn't need a connection ID, because it knows
 392                  * what device it was called on, and can thus get the
 393                  * superblock that it needs. */
 394                 /* has this minor been registered? */
 395                 if (!obddev->obd_type)
 396                         return -ENODEV;
 397
 398                 if (!obddev->u.sim.sim_sb || !obddev->u.sim.sim_sb->s_dev) {
 399                         CDEBUG(D_IOCTL, "fatal: device not initialized.\n");
 400                         err = -EINVAL;
 401                 } else {
 402                         if ((err = fsync_dev(obddev->u.sim.sim_sb->s_dev)))
 403                                 CDEBUG(D_IOCTL, "sync: fsync_dev failure\n");
 404                         else
 405                                 CDEBUG(D_IOCTL, "sync: success\n");
 406                 }
 407
 408                 return put_user(err, (int *) arg);
 409         }
 410         case OBD_IOC_CREATE: {
 411                 int err;
 412                 struct oic_create_s foo;
 413
 414                 if ( copy_from_user(&foo, (const void *)arg, sizeof(foo)) )
 415                         return -EFAULT;
 416
 417                 /* has this minor been registered? */
 418                 if ( !(obddev->obd_flags & OBD_ATTACHED) ||
 419                      !(obddev->obd_flags & OBD_SET_UP))
 420                         return -ENODEV;
 421
 422
 423                 if (!obddev->u.sim.sim_sb) {
 424                         CDEBUG(D_IOCTL, "fatal: device not initialized.\n");
 425                         return put_user(-EINVAL, (int *) arg);
 426                 }
 427
 428                 i_ino = OBP(obddev, create)(foo.conn_id, foo.prealloc, &err);
 429                 if (err) {
 430                         CDEBUG(D_IOCTL, "create: obd_inode_new failure\n");
 431                         /* 0 is the only error value */
 432                         return put_user(0, (int *) arg);
 433                 }
 434
 435                 return put_user(i_ino, (int *) arg);
 436         }
 437         case OBD_IOC_DESTROY:
 438         {
 439                 struct destroy_s {
 440                         unsigned int conn_id;
 441                         unsigned int ino;
 442                 } destroy;
 443
 444                 /* has this minor been registered? */
 445                 if (!obddev->obd_type)
 446                         return -ENODEV;
 447
 448
 449                 copy_from_user(&destroy, (int *)arg, sizeof(struct destroy_s));
 450                 if ( !obddev->obd_type ||
 451                      !obddev->obd_type->typ_ops->o_destroy)
 452                         return -EINVAL;
 453
 454                 return obddev->obd_type->typ_ops->o_destroy(destroy.conn_id, destroy.ino);
 455         }
 456         case OBD_IOC_SETATTR:
 457         {
 458                 int err;
 459                 struct oic_attr_s foo;
 460                 struct inode holder;
 461
 462                 /* has this minor been registered? */
 463                 if (!obddev->obd_type)
 464                         return -ENODEV;
 465
 466
 467                 err= copy_from_user(&foo, (int *)arg, sizeof(foo));
 468                 if (err)
 469                         return err;
 470
 471                 if ( !obddev->obd_type ||
 472                      !obddev->obd_type->typ_ops->o_setattr)
 473                         return -EINVAL;
 474
 475                 inode_setattr(&holder, &foo.iattr);
 476                 return obddev->obd_type->typ_ops->o_setattr(foo.conn_id, foo.ino, &holder);
 477         }
 478
 479         case OBD_IOC_GETATTR:
 480         {
 481                 int err;
 482                 struct tmp {
 483                         unsigned int conn_id;
 484                         unsigned long ino;
 485                 } foo;
 486                 struct iattr iattr;
 487                 struct inode holder;
 488                 copy_from_user(&foo, (int *)arg, sizeof(struct tmp));
 489
 490                 if ( !obddev->obd_type ||
 491                      !obddev->obd_type->typ_ops->o_getattr)
 492                         return -EINVAL;
 493
 494                 if (obddev->obd_type->typ_ops->o_getattr(foo.conn_id,
 495                                                          foo.ino, &holder))
 496                         return -EINVAL;
 497
 498                 inode_to_iattr(&holder, &iattr);
 499                 err = copy_to_user((int *)arg, &iattr, sizeof(iattr));
 500                 return err;
 501         }
 502
 503         case OBD_IOC_READ2:
 504         {
 505                 int err;
 506
 507                 /* has this minor been registered? */
 508                 if (!obddev->obd_type)
 509                         return -ENODEV;
 510
 511                 err = copy_from_user(&rw_s, (int *)arg, sizeof(struct oic_rw_s));
 512                 if ( err )
 513                         return err;
 514
 515                 if ( !obddev->obd_type->typ_ops ||
 516                      !obddev->obd_type->typ_ops->o_read )
 517                         return -EINVAL;
 518
 519                 rw_s.count = obddev->obd_type->typ_ops->o_read2(rw_s.conn_id,
 520                                        rw_s.inode,
 521                                        rw_s.buf,
 522                                        rw_s.count,
 523                                        rw_s.offset,
 524                                        &err);
 525                 if ( err )
 526                         return err;
 527
 528                 err = copy_to_user((int*)arg, &rw_s.count,
 529                                    sizeof(unsigned long));
 530                 return err;
 531         }
 532
 533
 534         case OBD_IOC_READ:
 535         {
 536                 int err;
 537                 /* has this minor been registered? */
 538                 if (!obddev->obd_type)
 539                         return -ENODEV;
 540
 541
 542                 err = copy_from_user(&rw_s, (int *)arg, sizeof(struct oic_rw_s));
 543                 if ( err )
 544                         return err;
 545
 546                 if ( !obddev->obd_type->typ_ops ||
 547                      !obddev->obd_type->typ_ops->o_read )
 548                         return -EINVAL;
 549
 550                 rw_s.count = obddev->obd_type->typ_ops->o_read(rw_s.conn_id,
 551                                                                rw_s.inode,
 552                                                                rw_s.buf,
 553                                                                rw_s.count,
 554                                                                rw_s.offset,
 555                                                                &err);
 556                 if ( err )
 557                         return err;
 558
 559                 err = copy_to_user((int*)arg, &rw_s.count,
 560                                    sizeof(unsigned long));
 561                 return err;
 562         }
 563
 564         case OBD_IOC_WRITE:
 565         {
 566                 int err;
 567                 /* has this minor been registered? */
 568                 if (!obddev->obd_type)
 569                         return -ENODEV;
 570
 571
 572                 copy_from_user(&rw_s, (int *)arg, sizeof(struct oic_rw_s));
 573                 CDEBUG(D_IOCTL, "\n");
 574                 if ( !obddev->obd_type->typ_ops->o_write )
 575                         return -EINVAL;
 576                 rw_s.count =
 577                         obddev->obd_type->typ_ops->o_write(rw_s.conn_id,
 578                                                            rw_s.inode,
 579                                                            rw_s.buf,
 580                                                            rw_s.count,
 581                                                            rw_s.offset,
 582                                                            &err);
 583
 584                 printk("Result rw_s.count %ld\n", rw_s.count);
 585                 return (int)rw_s.count;
 586                 copy_to_user((int *)arg, &rw_s.count,
 587                              sizeof(unsigned long));
 588                 return err;
 589         }
 590         case OBD_IOC_PREALLOCATE:
 591                 /* has this minor been registered? */
 592                 if (!obddev->obd_type)
 593                         return -ENODEV;
 594
 595
 596                 copy_from_user(&prealloc, (int *)arg,
 597                                sizeof(struct oic_prealloc_s));
 598
 599                 if (!obddev->u.sim.sim_sb || !obddev->u.sim.sim_sb->s_dev) {
 600                         CDEBUG(D_IOCTL, "fatal: device not initialized.\n");
 601                         return -EINVAL;
 602                 }
 603
 604                 if (!obddev->obd_type ||
 605                     !obddev->obd_type->typ_ops->o_preallocate)
 606                         return -EINVAL;
 607
 608                 prealloc.alloc =
 609                         obddev->obd_type->typ_ops->o_preallocate(prealloc.cli_id, prealloc.alloc,
 610                                                prealloc.inodes, &err);
 611                 if ( err )
 612                         return err;
 613                 return copy_to_user((int *)arg, &prealloc,
 614                                     sizeof(struct oic_prealloc_s));
 615         case OBD_IOC_STATFS:
 616         {
 617                 struct statfs *tmp;
 618                 unsigned int conn_id;
 619                 struct statfs buf;
 620                 int rc;
 621
 622                 /* has this minor been registered? */
 623                 if (!obddev->obd_type)
 624                         return -ENODEV;
 625
 626                 tmp = (void *)arg + sizeof(unsigned int);
 627                 get_user(conn_id, (int *) arg);
 628                 if ( !obddev->obd_type ||
 629                      !obddev->obd_type->typ_ops->o_statfs)
 630                         return -EINVAL;
 631
 632                 rc = obddev->obd_type->typ_ops->o_statfs(conn_id, &buf);
 633                 if ( rc )
 634                         return rc;
 635                 rc = copy_to_user(tmp, &buf, sizeof(buf));
 636                 return rc;
 637
 638         }
 639         default:
 640                 printk("invalid ioctl: cmd = %x, arg = %lx\n", cmd, arg);
 641                 return -ENOTTY;
 642         }
 643 }
 644
 645 /* Driver interface done, utility functions follow */
 646
 647 int obd_register_type(struct obd_ops *ops, char *nm)
 648 {
 649         struct obd_type *type;
 650
 651         if  ( obd_nm_to_type(nm) ) {
 652                 CDEBUG(D_IOCTL, "Type %s already registered\n", nm);
 653                 return -1;
 654         }
 655
 656         OBD_ALLOC(type, struct obd_type * , sizeof(*type));
 657         if ( !type )
 658                 return -ENOMEM;
 659         memset(type, 0, sizeof(*type));
 660         INIT_LIST_HEAD(&type->typ_chain);
 661
 662         list_add(&type->typ_chain, obd_types.next);
 663         type->typ_ops = ops;
 664         type->typ_name = nm;
 665         return 0;
 666 }
 667
 668 int obd_unregister_type(char *nm)
 669 {
 670         struct obd_type *type = obd_nm_to_type(nm);
 671
 672         if ( !type )
 673                 return -1;
 674
 675         if ( type->typ_refcnt )
 676                 return -1;
 677
 678         list_del(&type->typ_chain);
 679         OBD_FREE(type, sizeof(*type));
 680         return 0;
 681 }
 682
 683 /* declare character device */
 684 static struct file_operations obd_psdev_fops = {
 685         NULL,                  /* llseek */
 686         NULL,                  /* read */
 687         NULL,                  /* write */
 688         NULL,                  /* presto_psdev_readdir */
 689         NULL,                  /* poll */
 690         obd_class_ioctl,       /* ioctl */
 691         NULL,                  /* presto_psdev_mmap */
 692         obd_class_open,        /* open */
 693         NULL,
 694         obd_class_release,     /* release */
 695         NULL,                  /* fsync */
 696         NULL,                  /* fasync */
 697         NULL,                  /* check_media_change */
 698         NULL,                  /* revalidate */
 699         NULL                   /* lock */
 700 };
 701
 702
 703 /* modules setup */
 704
 705 int init_obd(void)
 706 {
 707         int i;
 708
 709         printk(KERN_INFO "OBD class driver  v0.002, braam@stelias.com\n");
 710
 711         INIT_LIST_HEAD(&obd_types);
 712
 713         if (register_chrdev(OBD_PSDEV_MAJOR,"obd_psdev",
 714                             &obd_psdev_fops)) {
 715                 printk(KERN_ERR "obd_psdev: unable to get major %d\n",
 716                        OBD_PSDEV_MAJOR);
 717                 return -EIO;
 718         }
 719
 720         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 721                 memset(&(obd_dev[i]), 0, sizeof(obd_dev[i]));
 722                 INIT_LIST_HEAD(&obd_dev[i].obd_gen_clients);
 723         }
 724
 725         obd_sysctl_init();
 726
 727         return 0;
 728 }
 729
 730 EXPORT_SYMBOL(obd_register_type);
 731 EXPORT_SYMBOL(obd_unregister_type);
 732
 733 EXPORT_SYMBOL(obd_print_entry);
 734 EXPORT_SYMBOL(obd_debug_level);
 735 EXPORT_SYMBOL(obd_dev);
 736
 737 EXPORT_SYMBOL(gen_connect);
 738 EXPORT_SYMBOL(gen_client);
 739 EXPORT_SYMBOL(gen_cleanup);
 740 EXPORT_SYMBOL(gen_disconnect);
 741
 742 EXPORT_SYMBOL(gen_multi_attach);
 743 EXPORT_SYMBOL(gen_multi_setup);
 744 EXPORT_SYMBOL(gen_multi_cleanup);
 745
 746
 747 #ifdef MODULE
 748 int init_module(void)
 749 {
 750         return init_obd();
 751 }
 752
 753 void cleanup_module(void)
 754 {
 755         int i;
 756         ENTRY;
 757
 758         unregister_chrdev(OBD_PSDEV_MAJOR, "obd_psdev");
 759         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 760                 struct obd_device *obddev = &obd_dev[i];
 761                 if ( obddev->obd_type &&
 762                      obddev->obd_type->typ_ops->o_cleanup_device )
 763                         OBP(obddev, cleanup_device)(obddev);
 764         }
 765
 766         obd_sysctl_clean();
 767 }
 768 #endif