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/ioctls.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/lustre_debug.h>
  45 #include <linux/smp_lock.h>
  46 #include <linux/lprocfs_status.h>
  47
  48 struct semaphore obd_conf_sem;   /* serialize configuration commands */
  49 struct obd_device obd_dev[MAX_OBD_DEVICES];
  50 struct list_head obd_types;
  51 unsigned long obd_memory;
  52
  53 /* The following are visible and mutable through /proc/sys/lustre/. */
  54 unsigned long obd_fail_loc;
  55 unsigned long obd_timeout = 100;
  56 char obd_recovery_upcall[128] = "/usr/lib/lustre/ha_assist";
  57
  58 extern struct obd_type *class_nm_to_type(char *nm);
  59
  60 /*  opening /dev/obd */
  61 static int obd_class_open(struct inode * inode, struct file * file)
  62 {
  63         ENTRY;
  64
  65         file->private_data = NULL;
  66         CDEBUG(D_IOCTL, "MOD_INC_USE for open: count = %d\n",
  67                atomic_read(&(THIS_MODULE)->uc.usecount));
  68         MOD_INC_USE_COUNT;
  69         RETURN(0);
  70 }
  71
  72 /*  closing /dev/obd */
  73 static int obd_class_release(struct inode * inode, struct file * file)
  74 {
  75         ENTRY;
  76
  77         // XXX drop lsm, connections here
  78         if (file->private_data)
  79                 file->private_data = NULL;
  80
  81         CDEBUG(D_IOCTL, "MOD_DEC_USE for close: count = %d\n",
  82                atomic_read(&(THIS_MODULE)->uc.usecount) - 1);
  83         MOD_DEC_USE_COUNT;
  84         RETURN(0);
  85 }
  86
  87
  88 inline void obd_data2conn(struct lustre_handle *conn, struct obd_ioctl_data *data)
  89 {
  90         conn->addr = data->ioc_addr;
  91         conn->cookie = data->ioc_cookie;
  92 }
  93
  94
  95 inline void obd_conn2data(struct obd_ioctl_data *data, struct lustre_handle *conn)
  96 {
  97         data->ioc_addr = conn->addr;
  98         data->ioc_cookie = conn->cookie;
  99 }
 100
 101 static void forcibly_detach_exports(struct obd_device *obd)
 102 {
 103         int rc;
 104         struct list_head *tmp, *n;
 105         struct lustre_handle fake_conn;
 106
 107         CDEBUG(D_IOCTL, "OBD device %d (%p) has exports, "
 108                "disconnecting them", obd->obd_minor, obd);
 109         list_for_each_safe(tmp, n, &obd->obd_exports) {
 110                 struct obd_export *exp = list_entry(tmp, struct obd_export,
 111                                                     exp_obd_chain);
 112                 fake_conn.addr = (__u64)(unsigned long)exp;
 113                 fake_conn.cookie = exp->exp_cookie;
 114                 rc = obd_disconnect(&fake_conn);
 115                 if (rc) {
 116                         CDEBUG(D_IOCTL, "disconnecting export %p failed: %d\n",
 117                                exp, rc);
 118                 } else {
 119                         CDEBUG(D_IOCTL, "export %p disconnected\n", exp);
 120                 }
 121         }
 122 }
 123
 124 /* to control /dev/obd */
 125 static int obd_class_ioctl (struct inode * inode, struct file * filp,
 126                             unsigned int cmd, unsigned long arg)
 127 {
 128         char *buf = NULL;
 129         int len = 0;
 130         struct obd_ioctl_data *data;
 131         struct obd_device *obd = filp->private_data;
 132
 133         struct lustre_handle conn;
 134         int rw = OBD_BRW_READ;
 135         int err = 0;
 136         int serialised = 0;
 137
 138         ENTRY;
 139
 140         switch (cmd)
 141         {
 142         case OBD_IOC_BRW_WRITE:
 143         case OBD_IOC_BRW_READ:
 144         case OBD_IOC_GETATTR:
 145                 break;
 146         default:
 147                 down(&obd_conf_sem);
 148                 serialised = 1;
 149                 break;
 150         }
 151
 152         if (!obd && cmd != OBD_IOC_DEVICE && cmd != TCGETS &&
 153             cmd != OBD_IOC_LIST &&
 154             cmd != OBD_IOC_NAME2DEV && cmd != OBD_IOC_NEWDEV) {
 155                 CERROR("OBD ioctl: No device\n");
 156                 GOTO(out, err=-EINVAL);
 157         }
 158         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 159                 CERROR("OBD ioctl: data error\n");
 160                 GOTO(out, err=-EINVAL);
 161         }
 162         data = (struct obd_ioctl_data *)buf;
 163
 164         switch (cmd) {
 165         case TCGETS:
 166                 GOTO(out, err=-EINVAL);
 167         case OBD_IOC_DEVICE: {
 168                 CDEBUG(D_IOCTL, "\n");
 169                 if (data->ioc_dev >= MAX_OBD_DEVICES || data->ioc_dev < 0) {
 170                         CERROR("OBD ioctl: DEVICE insufficient devices\n");
 171                         GOTO(out, err=-EINVAL);
 172                 }
 173                 CDEBUG(D_IOCTL, "device %d\n", data->ioc_dev);
 174
 175                 filp->private_data = &obd_dev[data->ioc_dev];
 176                 GOTO(out, err=0);
 177         }
 178
 179         case OBD_IOC_LIST: {
 180                 int i;
 181                 char *buf2 = data->ioc_bulk;
 182                 int remains = data->ioc_inllen1;
 183
 184                 if (!data->ioc_inlbuf1) {
 185                         CERROR("No buffer passed!\n");
 186                         GOTO(out, err=-EINVAL);
 187                 }
 188
 189
 190                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 191                         int l;
 192                         char *status;
 193                         struct obd_device *obd = &obd_dev[i];
 194                         if (!obd->obd_type)
 195                                 continue;
 196                         if (obd->obd_flags & OBD_SET_UP)
 197                                 status = "UP";
 198                         else if (obd->obd_flags & OBD_ATTACHED)
 199                                 status = "AT";
 200                         else
 201                                 status = "-";
 202                         l = snprintf(buf2, remains, "%2d %s %s %s %s %d\n",
 203                                      i, status, obd->obd_type->typ_name,
 204                                      obd->obd_name, obd->obd_uuid, obd->obd_type->typ_refcnt);
 205                         buf2 +=l;
 206                         remains -=l;
 207                         if (remains <= 0) {
 208                                 CERROR("not enough space for device listing\n");
 209                                 break;
 210                         }
 211                 }
 212
 213                 err = copy_to_user((void *)arg, data, len);
 214                 GOTO(out, err);
 215         }
 216
 217
 218         case OBD_IOC_NAME2DEV: {
 219                 /* Resolve a device name.  This does not change the
 220                  * currently selected device.
 221                  */
 222                 int dev;
 223
 224                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1 ) {
 225                         CERROR("No name passed,!\n");
 226                         GOTO(out, err=-EINVAL);
 227                 }
 228                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 229                         CERROR("Name not nul terminated!\n");
 230                         GOTO(out, err=-EINVAL);
 231                 }
 232
 233                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 234                 dev = class_name2dev(data->ioc_inlbuf1);
 235                 data->ioc_dev = dev;
 236                 if (dev == -1) {
 237                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 238                                data->ioc_inlbuf1);
 239                         GOTO(out, err=-EINVAL);
 240                 }
 241
 242                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 243                        dev);
 244                 err = copy_to_user((void *)arg, data, sizeof(*data));
 245                 GOTO(out, err);
 246         }
 247
 248         case OBD_IOC_UUID2DEV: {
 249                 /* Resolve a device uuid.  This does not change the
 250                  * currently selected device.
 251                  */
 252                 int dev;
 253
 254                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 255                         CERROR("No UUID passed!\n");
 256                         GOTO(out, err=-EINVAL);
 257                 }
 258                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 259                         CERROR("Name not nul terminated!\n");
 260                         GOTO(out, err=-EINVAL);
 261                 }
 262
 263                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 264                 dev = class_uuid2dev(data->ioc_inlbuf1);
 265                 data->ioc_dev = dev;
 266                 if (dev == -1) {
 267                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 268                                data->ioc_inlbuf1);
 269                         GOTO(out, err=-EINVAL);
 270                 }
 271
 272                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 273                        dev);
 274                 err = copy_to_user((void *)arg, data, sizeof(*data));
 275                 GOTO(out, err);
 276         }
 277
 278         case OBD_IOC_NEWDEV: {
 279                 int dev = -1;
 280                 int i;
 281
 282                 filp->private_data = NULL;
 283                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 284                         struct obd_device *obd = &obd_dev[i];
 285                         if (!obd->obd_type) {
 286                                 filp->private_data = obd;
 287                                 dev = i;
 288                                 break;
 289                         }
 290                 }
 291
 292
 293                 data->ioc_dev = dev;
 294                 if (dev == -1)
 295                         GOTO(out, err=-EINVAL);
 296
 297                 err = copy_to_user((void *)arg, data, sizeof(*data));
 298                 GOTO(out, err);
 299         }
 300
 301         case OBD_IOC_ATTACH: {
 302                 struct obd_type *type;
 303                 int minor;
 304
 305                 /* have we attached a type to this device */
 306                 if (obd->obd_flags & OBD_ATTACHED || obd->obd_type) {
 307                         CERROR("OBD: Device %d already typed as %s.\n",
 308                                obd->obd_minor, MKSTR(obd->obd_type->typ_name));
 309                         GOTO(out, err=-EBUSY);
 310                 }
 311
 312                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 313                         CERROR("No type passed!\n");
 314                         GOTO(out, err=-EINVAL);
 315                 }
 316                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 317                         CERROR("Type not nul terminated!\n");
 318                         GOTO(out, err=-EINVAL);
 319                 }
 320
 321                 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 322                        MKSTR(data->ioc_inlbuf1),
 323                        MKSTR(data->ioc_inlbuf2), MKSTR(data->ioc_inlbuf3));
 324
 325                 /* find the type */
 326                 type = class_nm_to_type(data->ioc_inlbuf1);
 327                 if (!type) {
 328                         CERROR("OBD: unknown type dev %d\n", obd->obd_minor);
 329                         GOTO(out, err=-EINVAL);
 330                 }
 331
 332                 minor = obd->obd_minor;
 333                 memset(obd, 0, sizeof(*obd));
 334                 obd->obd_minor = minor;
 335                 obd->obd_type = type;
 336                 INIT_LIST_HEAD(&obd->obd_exports);
 337                 INIT_LIST_HEAD(&obd->obd_imports);
 338                 spin_lock_init(&obd->obd_dev_lock);
 339
 340                         if (data->ioc_inlbuf2) {
 341                                 int len = strlen(data->ioc_inlbuf2) + 1;
 342                                 OBD_ALLOC(obd->obd_name, len);
 343                                 if (!obd->obd_name) {
 344                                         CERROR("no memory\n");
 345                                         LBUG();
 346                                 }
 347                                 memcpy(obd->obd_name, data->ioc_inlbuf2, len);
 348                         } else {
 349                                 CERROR("WARNING: unnamed obd device\n");
 350                         }
 351                         if (data->ioc_inlbuf3) {
 352                                 int len = strlen(data->ioc_inlbuf3);
 353                                 if (len >= sizeof(obd->obd_uuid)) {
 354                                         CERROR("uuid must be < %d bytes long\n",
 355                                                sizeof(obd->obd_uuid));
 356                                         if (obd->obd_name)
 357                                                 OBD_FREE(obd->obd_name,
 358                                                          strlen(obd->obd_name) + 1);
 359                                         GOTO(out, err=-EINVAL);
 360                                 }
 361                                 memcpy(obd->obd_uuid, data->ioc_inlbuf3, len);
 362                         }
 363                 /* do the attach */
 364                 if (OBP(obd, attach))
 365                         err = OBP(obd,attach)(obd, sizeof(*data), data);
 366                 if (err) {
 367                         if(data->ioc_inlbuf2)
 368                                 OBD_FREE(obd->obd_name, strlen(obd->obd_name)+1);
 369                         obd->obd_type = NULL;
 370
 371                         } else {
 372                         obd->obd_flags |= OBD_ATTACHED;
 373
 374                         type->typ_refcnt++;
 375                         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s\n",
 376                                obd->obd_minor, data->ioc_inlbuf1);
 377
 378                         CDEBUG(D_IOCTL, "MOD_INC_USE for attach: count = %d\n",
 379                                atomic_read(&(THIS_MODULE)->uc.usecount));
 380                         MOD_INC_USE_COUNT;
 381                 }
 382
 383                 GOTO(out, err);
 384         }
 385
 386         case OBD_IOC_DETACH: {
 387                 ENTRY;
 388                 if (obd->obd_flags & OBD_SET_UP) {
 389                         CERROR("OBD device %d still set up\n", obd->obd_minor);
 390                         GOTO(out, err=-EBUSY);
 391                 }
 392                 if (!(obd->obd_flags & OBD_ATTACHED) ) {
 393                         CERROR("OBD device %d not attached\n", obd->obd_minor);
 394                         GOTO(out, err=-ENODEV);
 395                 }
 396                 if (!list_empty(&obd->obd_exports)) {
 397                         if (!data->ioc_inlbuf1 || data->ioc_inlbuf1[0] != 'F') {
 398                                 CERROR("OBD device %d (%p) has exports\n",
 399                                        obd->obd_minor, obd);
 400                                 GOTO(out, err=-EBUSY);
 401                         }
 402                         forcibly_detach_exports(obd);
 403                 }
 404                    if (OBP(obd, detach))
 405                         err=OBP(obd,detach)(obd);
 406
 407                 if (obd->obd_name) {
 408                         OBD_FREE(obd->obd_name, strlen(obd->obd_name)+1);
 409                         obd->obd_name = NULL;
 410                 }
 411
 412                 obd->obd_flags &= ~OBD_ATTACHED;
 413                 obd->obd_type->typ_refcnt--;
 414                 obd->obd_type = NULL;
 415                 CDEBUG(D_IOCTL, "MOD_DEC_USE for detach: count = %d\n",
 416                        atomic_read(&(THIS_MODULE)->uc.usecount) - 1);
 417                 MOD_DEC_USE_COUNT;
 418                 GOTO(out, err = 0);
 419         }
 420
 421         case OBD_IOC_SETUP: {
 422                 /* have we attached a type to this device? */
 423                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 424                         CERROR("Device %d not attached\n", obd->obd_minor);
 425                         GOTO(out, err=-ENODEV);
 426                 }
 427
 428                 /* has this been done already? */
 429                 if ( obd->obd_flags & OBD_SET_UP ) {
 430                         CERROR("Device %d already setup (type %s)\n",
 431                                obd->obd_minor, obd->obd_type->typ_name);
 432                         GOTO(out, err=-EBUSY);
 433                 }
 434
 435                 if ( OBT(obd) && OBP(obd, setup) )
 436                         err = obd_setup(obd, sizeof(*data), data);
 437
 438                 if (!err) {
 439                         obd->obd_type->typ_refcnt++;
 440                         obd->obd_flags |= OBD_SET_UP;
 441                 }
 442
 443                 GOTO(out, err);
 444         }
 445         case OBD_IOC_CLEANUP: {
 446                 /* have we attached a type to this device? */
 447                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 448                         CERROR("Device %d not attached\n", obd->obd_minor);
 449                         GOTO(out, err=-ENODEV);
 450                 }
 451
 452                 if ( OBT(obd) && OBP(obd, cleanup) )
 453                         err = obd_cleanup(obd);
 454
 455                 if (!err) {
 456                         obd->obd_flags &= ~OBD_SET_UP;
 457                         obd->obd_type->typ_refcnt--;
 458                 }
 459                 GOTO(out, err);
 460         }
 461
 462         case OBD_IOC_CONNECT: {
 463                 char * cluuid = "OBD_CLASS_UUID";
 464                 obd_data2conn(&conn, data);
 465
 466                 err = obd_connect(&conn, obd, cluuid, NULL, NULL);
 467
 468                 CDEBUG(D_IOCTL, "assigned export "LPX64"\n", conn.addr);
 469                 obd_conn2data(data, &conn);
 470                 if (err)
 471                         GOTO(out, err);
 472
 473                 err = copy_to_user((void *)arg, data, sizeof(*data));
 474                 // XXX save connection data into file handle
 475                 GOTO(out, err);
 476         }
 477
 478         case OBD_IOC_DISCONNECT: {
 479                 obd_data2conn(&conn, data);
 480                 err = obd_disconnect(&conn);
 481                 GOTO(out, err);
 482         }
 483
 484         case OBD_IOC_DEC_USE_COUNT: {
 485                 CDEBUG(D_IOCTL, "MOD_DEC_USE for force dec: count = %d\n",
 486                        atomic_read(&(THIS_MODULE)->uc.usecount) - 1);
 487                 MOD_DEC_USE_COUNT;
 488                 GOTO(out, err=0);
 489         }
 490
 491         case OBD_IOC_CREATE: {
 492                 struct lov_stripe_md *lsm = NULL;
 493                 obd_data2conn(&conn, data);
 494
 495 #warning FIXME: save lsm into file handle for other ops, release on close
 496                 err = obd_create(&conn, &data->ioc_obdo1, &lsm);
 497                 if (!err)
 498                         err = copy_to_user((void *)arg, data, sizeof(*data));
 499                 GOTO(out, err);
 500         }
 501
 502         case OBD_IOC_GETATTR: {
 503
 504                 obd_data2conn(&conn, data);
 505                 err = obd_getattr(&conn, &data->ioc_obdo1, NULL);
 506                 if (!err)
 507                         err = copy_to_user((void *)arg, data, sizeof(*data));
 508                 GOTO(out, err);
 509         }
 510
 511         case OBD_IOC_SETATTR: {
 512                 obd_data2conn(&conn, data);
 513                 err = obd_setattr(&conn, &data->ioc_obdo1, NULL);
 514                 if (!err)
 515                         err = copy_to_user((void *)arg, data, sizeof(*data));
 516                 GOTO(out, err);
 517         }
 518
 519         case OBD_IOC_DESTROY: {
 520                 //void *ea;
 521                 obd_data2conn(&conn, data);
 522
 523                 err = obd_destroy(&conn, &data->ioc_obdo1, NULL);
 524                 if (!err)
 525                         err = copy_to_user((void *)arg, data, sizeof(*data));
 526                 GOTO(out, err);
 527         }
 528
 529         case OBD_IOC_OPEN: {
 530                 struct lov_stripe_md *lsm = NULL; // XXX fill in from create
 531
 532                 obd_data2conn(&conn, data);
 533                 err = obd_open(&conn, &data->ioc_obdo1, lsm);
 534                 if (!err)
 535                         err = copy_to_user((void *)arg, data, sizeof(*data));
 536                 GOTO(out, err);
 537         }
 538
 539         case OBD_IOC_CLOSE: {
 540                 struct lov_stripe_md *lsm = NULL; // XXX fill in from create
 541
 542                 obd_data2conn(&conn, data);
 543                 err = obd_close(&conn, &data->ioc_obdo1, lsm);
 544                 GOTO(out, err);
 545         }
 546
 547         case OBD_IOC_BRW_WRITE:
 548                 rw = OBD_BRW_WRITE;
 549         case OBD_IOC_BRW_READ: {
 550                 struct lov_stripe_md tmp_lsm; // XXX fill in from create
 551                 struct lov_stripe_md *lsm = &tmp_lsm; // XXX fill in from create
 552                 struct brw_cb_data *brw_cbd = ll_init_brw_cb_data();
 553                 obd_count       pages = 0;
 554                 struct brw_page *pga, *pgp;
 555                 __u64 id = data->ioc_obdo1.o_id;
 556                 int gfp_mask = (id & 1) ? GFP_HIGHUSER : GFP_KERNEL;
 557                 int verify = (id != 0);
 558                 __u64 off;
 559                 int j;
 560
 561                 if (!brw_cbd)
 562                         GOTO(out, err = -ENOMEM);
 563
 564                 obd_data2conn(&conn, data);
 565
 566                 pages = data->ioc_count / PAGE_SIZE;
 567                 off = data->ioc_offset;
 568
 569                 CDEBUG(D_INODE, "BRW %s with %d pages @ "LPX64"\n",
 570                        rw == OBD_BRW_READ ? "read" : "write", pages, off);
 571                 OBD_ALLOC(pga, pages * sizeof(*pga));
 572                 if (!pga) {
 573                         CERROR("no memory for %d BRW per-page data\n", pages);
 574                         GOTO(brw_free, err = -ENOMEM);
 575                 }
 576
 577                 memset(lsm, 0, sizeof(*lsm)); // XXX don't do this later
 578                 lsm->lsm_object_id = id; // ensure id == lsm->lsm_object_id
 579
 580                 for (j = 0, pgp = pga; j < pages; j++, off += PAGE_SIZE, pgp++){
 581                         pgp->pg = alloc_pages(gfp_mask, 0);
 582                         if (!pgp->pg) {
 583                                 CERROR("no memory for brw pages\n");
 584                                 GOTO(brw_cleanup, err = -ENOMEM);
 585                         }
 586                         pgp->count = PAGE_SIZE;
 587                         pgp->off = off;
 588                         pgp->flag = 0;
 589
 590                         if (verify) {
 591                                 void *addr = kmap(pgp->pg);
 592
 593                                 if (rw == OBD_BRW_WRITE)
 594                                         page_debug_setup(addr, pgp->count,
 595                                                          pgp->off, id);
 596                                 else
 597                                         page_debug_setup(addr, pgp->count,
 598                                                          0xdeadbeef00c0ffee,
 599                                                          0xdeadbeef00c0ffee);
 600                                 kunmap(pgp->pg);
 601                         }
 602                 }
 603
 604                 err = obd_brw(rw, &conn, lsm, j, pga, ll_sync_brw_cb, brw_cbd);
 605                 if (err)
 606                         CERROR("test_brw: error from obd_brw: err = %d\n", err);
 607                 EXIT;
 608         brw_cleanup:
 609                 for (j = 0, pgp = pga; j < pages; j++, pgp++) {
 610                         if (pgp->pg != NULL) {
 611                                 if (verify && !err) {
 612                                         void *addr = kmap(pgp->pg);
 613
 614                                         err = page_debug_check("test_brw",
 615                                                                addr,
 616                                                                PAGE_SIZE,
 617                                                                pgp->off,id);
 618                                         kunmap(pgp->pg);
 619                                 }
 620                                 __free_pages(pgp->pg, 0);
 621                         }
 622                 }
 623         brw_free:
 624                 OBD_FREE(pga, pages * sizeof(*pga));
 625                 GOTO(out, err);
 626         }
 627         default:
 628                 obd_data2conn(&conn, data);
 629
 630                 err = obd_iocontrol(cmd, &conn, len, data, NULL);
 631                 if (err)
 632                         GOTO(out, err);
 633
 634                 err = copy_to_user((void *)arg, data, len);
 635                 GOTO(out, err);
 636         }
 637
 638  out:
 639         if (buf)
 640                 OBD_FREE(buf, len);
 641         if (serialised)
 642                 up(&obd_conf_sem);
 643         RETURN(err);
 644 } /* obd_class_ioctl */
 645
 646
 647
 648 /* declare character device */
 649 static struct file_operations obd_psdev_fops = {
 650         ioctl: obd_class_ioctl,       /* ioctl */
 651         open: obd_class_open,        /* open */
 652         release: obd_class_release,     /* release */
 653 };
 654
 655 /* modules setup */
 656 #define OBD_MINOR 241
 657 static struct miscdevice obd_psdev = {
 658         OBD_MINOR,
 659         "obd_psdev",
 660         &obd_psdev_fops
 661 };
 662
 663 void (*class_signal_connection_failure)(struct ptlrpc_connection *);
 664
 665 EXPORT_SYMBOL(obd_dev);
 666 EXPORT_SYMBOL(obdo_cachep);
 667 EXPORT_SYMBOL(obd_memory);
 668 EXPORT_SYMBOL(obd_fail_loc);
 669 EXPORT_SYMBOL(obd_timeout);
 670 EXPORT_SYMBOL(obd_recovery_upcall);
 671 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 672
 673 EXPORT_SYMBOL(class_register_type);
 674 EXPORT_SYMBOL(class_unregister_type);
 675 EXPORT_SYMBOL(class_name2dev);
 676 EXPORT_SYMBOL(class_uuid2dev);
 677 EXPORT_SYMBOL(class_uuid2obd);
 678 EXPORT_SYMBOL(class_new_export);
 679 EXPORT_SYMBOL(class_destroy_export);
 680 EXPORT_SYMBOL(class_connect);
 681 EXPORT_SYMBOL(class_conn2export);
 682 EXPORT_SYMBOL(class_conn2obd);
 683 EXPORT_SYMBOL(class_conn2cliimp);
 684 EXPORT_SYMBOL(class_conn2ldlmimp);
 685 EXPORT_SYMBOL(class_disconnect);
 686 EXPORT_SYMBOL(class_disconnect_all);
 687 //EXPORT_SYMBOL(class_uuid_parse);
 688 EXPORT_SYMBOL(class_uuid_unparse);
 689 //EXPORT_SYMBOL(class_multi_setup);
 690 //EXPORT_SYMBOL(class_multi_cleanup);
 691
 692 EXPORT_SYMBOL(class_signal_connection_failure);
 693 EXPORT_SYMBOL(ll_sync_brw_cb);
 694 EXPORT_SYMBOL(ll_init_brw_cb_data);
 695 EXPORT_SYMBOL(class_nm_to_type);
 696
 697 static int __init init_obdclass(void)
 698 {
 699         struct obd_device *obd;
 700         int err;
 701         int i;
 702
 703         printk(KERN_INFO "OBD class driver  v0.9, info@clusterfs.com\n");
 704
 705         sema_init(&obd_conf_sem, 1);
 706         INIT_LIST_HEAD(&obd_types);
 707
 708         if ((err = misc_register(&obd_psdev))) {
 709                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 710                 return err;
 711         }
 712
 713         /* This struct is already zerod for us (static global) */
 714         for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
 715                 obd->obd_minor = i;
 716
 717         err = obd_init_caches();
 718
 719         if (err)
 720                 return err;
 721         obd_sysctl_init();
 722
 723         err=lprocfs_reg_main();
 724
 725         return 0;
 726 }
 727
 728 static void __exit cleanup_obdclass(void)
 729 {
 730         int i, err;
 731         ENTRY;
 732
 733         misc_deregister(&obd_psdev);
 734         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 735                 struct obd_device *obd = &obd_dev[i];
 736                 if (obd->obd_type && (obd->obd_flags & OBD_SET_UP) &&
 737                     OBT(obd) && OBP(obd, detach)) {
 738                         /* XXX should this call generic detach otherwise? */
 739                         OBP(obd, detach)(obd);
 740                 }
 741         }
 742
 743         obd_cleanup_caches();
 744         obd_sysctl_clean();
 745
 746         err = lprocfs_dereg_main();
 747
 748         CERROR("obd memory leaked: %ld bytes\n", obd_memory);
 749         EXIT;
 750 }
 751
 752 /* Check that we're building against the appropriate version of the Lustre
 753  * kernel patch */
 754 #include <linux/lustre_version.h>
 755 #if (LUSTRE_KERNEL_VERSION != 2)
 756 # error Cannot continue: Your Lustre kernel patch is out of date
 757 #endif
 758
 759 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 760 MODULE_DESCRIPTION("Lustre Class Driver v1.0");
 761 MODULE_LICENSE("GPL");
 762
 763 module_init(init_obdclass);
 764 module_exit(cleanup_obdclass);