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  * Object Devices Class Driver
   5  *
   6  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * These are the only exported functions, they provide some generic
  24  * infrastructure for managing object devices
  25  */
  26
  27 #define DEBUG_SUBSYSTEM S_CLASS
  28 #ifndef EXPORT_SYMTAB
  29 # define EXPORT_SYMTAB
  30 #endif
  31 #ifdef __KERNEL__
  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/slab.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/fs.h>
  46 #include <linux/poll.h>
  47 #include <linux/init.h>
  48 #include <linux/list.h>
  49 #include <linux/highmem.h>
  50 #include <asm/io.h>
  51 #include <asm/ioctls.h>
  52 #include <asm/system.h>
  53 #include <asm/poll.h>
  54 #include <asm/uaccess.h>
  55 #include <linux/miscdevice.h>
  56 #include <linux/smp_lock.h>
  57 #include <linux/seq_file.h>
  58 #else
  59 # include <liblustre.h>
  60 #endif
  61
  62 #include <linux/obd_support.h>
  63 #include <linux/obd_class.h>
  64 #include <linux/lustre_debug.h>
  65 #include <linux/lprocfs_status.h>
  66 #ifdef __KERNEL__
  67 #include <linux/lustre_build_version.h>
  68 #include <linux/lustre_version.h>
  69 #endif
  70 #include <portals/list.h>
  71
  72 #ifndef __KERNEL__
  73 /* liblustre workaround */
  74 atomic_t portal_kmemory = {0};
  75 #endif
  76
  77 struct semaphore obd_conf_sem;   /* serialize configuration commands */
  78 struct obd_device obd_dev[MAX_OBD_DEVICES];
  79 struct list_head obd_types;
  80 #ifndef __KERNEL__
  81 atomic_t obd_memory;
  82 int obd_memmax;
  83 #endif
  84
  85 int proc_version;
  86
  87 /* The following are visible and mutable through /proc/sys/lustre/. */
  88 unsigned int obd_fail_loc;
  89 unsigned int obd_timeout = 100;
  90 char obd_lustre_upcall[128] = "DEFAULT"; /* or NONE or /full/path/to/upcall  */
  91 unsigned int obd_sync_filter; /* = 0, don't sync by default */
  92
  93 DECLARE_WAIT_QUEUE_HEAD(obd_race_waitq);
  94
  95 #ifdef __KERNEL__
  96 /*  opening /dev/obd */
  97 static int obd_class_open(struct inode * inode, struct file * file)
  98 {
  99         ENTRY;
 100
 101         PORTAL_MODULE_USE;
 102         RETURN(0);
 103 }
 104
 105 /*  closing /dev/obd */
 106 static int obd_class_release(struct inode * inode, struct file * file)
 107 {
 108         ENTRY;
 109
 110         PORTAL_MODULE_UNUSE;
 111         RETURN(0);
 112 }
 113 #endif
 114
 115 static inline void obd_data2conn(struct lustre_handle *conn,
 116                                  struct obd_ioctl_data *data)
 117 {
 118         memset(conn, 0, sizeof *conn);
 119         conn->cookie = data->ioc_cookie;
 120 }
 121
 122 static inline void obd_conn2data(struct obd_ioctl_data *data,
 123                                  struct lustre_handle *conn)
 124 {
 125         data->ioc_cookie = conn->cookie;
 126 }
 127
 128 int class_resolve_dev_name(uint32_t len, char *name)
 129 {
 130         int rc;
 131         int dev;
 132
 133         if (!len || !name) {
 134                 CERROR("No name passed,!\n");
 135                 GOTO(out, rc = -EINVAL);
 136         }
 137         if (name[len - 1] != 0) {
 138                 CERROR("Name not nul terminated!\n");
 139                 GOTO(out, rc = -EINVAL);
 140         }
 141
 142         CDEBUG(D_IOCTL, "device name %s\n", name);
 143         dev = class_name2dev(name);
 144         if (dev == -1) {
 145                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 146                 GOTO(out, rc = -EINVAL);
 147         }
 148
 149         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 150         rc = dev;
 151
 152 out:
 153         RETURN(rc);
 154 }
 155
 156 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 157 {
 158         char *buf = NULL;
 159         struct obd_ioctl_data *data;
 160         struct portals_debug_ioctl_data *debug_data;
 161         struct obd_device *obd = NULL;
 162         int err = 0, len = 0, serialised = 0;
 163         ENTRY;
 164
 165         if (current->fsuid != 0)
 166                 RETURN(err = -EACCES);
 167
 168         if ((cmd & 0xffffff00) == ((int)'T') << 8) /* ignore all tty ioctls */
 169                 RETURN(err = -ENOTTY);
 170
 171         /* only for debugging */
 172         if (cmd == PTL_IOC_DEBUG_MASK) {
 173                 debug_data = (struct portals_debug_ioctl_data*)arg;
 174                 portal_subsystem_debug = debug_data->subs;
 175                 portal_debug = debug_data->debug;
 176                 return 0;
 177         }
 178
 179         switch (cmd) {
 180         case OBD_IOC_BRW_WRITE:
 181         case OBD_IOC_BRW_READ:
 182         case OBD_IOC_GETATTR:
 183         case ECHO_IOC_ENQUEUE:
 184         case ECHO_IOC_CANCEL:
 185         case OBD_IOC_CLIENT_RECOVER:
 186         case OBD_IOC_CATLOGLIST:
 187         case OBD_IOC_LLOG_INFO:
 188         case OBD_IOC_LLOG_PRINT:
 189         case OBD_IOC_LLOG_CANCEL:
 190         case OBD_IOC_LLOG_CHECK:
 191         case OBD_IOC_LLOG_REMOVE:
 192                 break;
 193         default:
 194                 down(&obd_conf_sem);
 195                 serialised = 1;
 196                 break;
 197         }
 198
 199         CDEBUG(D_IOCTL, "cmd = %x, obd = %p\n", cmd, obd);
 200         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 201                 CERROR("OBD ioctl: data error\n");
 202                 GOTO(out, err = -EINVAL);
 203         }
 204         data = (struct obd_ioctl_data *)buf;
 205
 206         switch (cmd) {
 207         case OBD_IOC_PROCESS_CFG: {
 208                 char *buf;
 209                 struct lustre_cfg *lcfg;
 210
 211                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 212                         CERROR("No config buffer passed!\n");
 213                         GOTO(out, err = -EINVAL);
 214                 }
 215                 err = lustre_cfg_getdata(&buf, data->ioc_plen1,
 216                                          data->ioc_pbuf1, 0);
 217                 if (err)
 218                         GOTO(out, err);
 219                 lcfg = (struct lustre_cfg* ) buf;
 220
 221                 err = class_process_config(lcfg);
 222                 lustre_cfg_freedata(buf, data->ioc_plen1);
 223                 GOTO(out, err);
 224         }
 225
 226         case OBD_GET_VERSION:
 227                 if (!data->ioc_inlbuf1) {
 228                         CERROR("No buffer passed in ioctl\n");
 229                         GOTO(out, err = -EINVAL);
 230                 }
 231
 232                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 233                         CERROR("ioctl buffer too small to hold version\n");
 234                         GOTO(out, err = -EINVAL);
 235                 }
 236
 237                 memcpy(data->ioc_bulk, BUILD_VERSION,
 238                        strlen(BUILD_VERSION) + 1);
 239
 240                 err = copy_to_user((void *)arg, data, len);
 241                 if (err)
 242                         err = -EFAULT;
 243                 GOTO(out, err);
 244
 245         case OBD_IOC_NAME2DEV: {
 246                 /* Resolve a device name.  This does not change the
 247                  * currently selected device.
 248                  */
 249                 int dev;
 250
 251                 dev = class_resolve_dev_name(data->ioc_inllen1,
 252                                              data->ioc_inlbuf1);
 253                 data->ioc_dev = dev;
 254                 if (dev < 0)
 255                         GOTO(out, err = -EINVAL);
 256
 257                 err = copy_to_user((void *)arg, data, sizeof(*data));
 258                 if (err)
 259                         err = -EFAULT;
 260                 GOTO(out, err);
 261         }
 262
 263         case OBD_IOC_UUID2DEV: {
 264                 /* Resolve a device uuid.  This does not change the
 265                  * currently selected device.
 266                  */
 267                 int dev;
 268                 struct obd_uuid uuid;
 269
 270                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 271                         CERROR("No UUID passed!\n");
 272                         GOTO(out, err = -EINVAL);
 273                 }
 274                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 275                         CERROR("UUID not NUL terminated!\n");
 276                         GOTO(out, err = -EINVAL);
 277                 }
 278
 279                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 280                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 281                 dev = class_uuid2dev(&uuid);
 282                 data->ioc_dev = dev;
 283                 if (dev == -1) {
 284                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 285                                data->ioc_inlbuf1);
 286                         GOTO(out, err = -EINVAL);
 287                 }
 288
 289                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 290                        dev);
 291                 err = copy_to_user((void *)arg, data, sizeof(*data));
 292                 if (err)
 293                         err = -EFAULT;
 294                 GOTO(out, err);
 295         }
 296
 297
 298         case OBD_IOC_CLOSE_UUID: {
 299                 ptl_nid_t       peer_nid;
 300                 __u32           peer_nal;
 301                 CDEBUG(D_IOCTL, "closing all connections to uuid %s\n",
 302                        data->ioc_inlbuf1);
 303                 lustre_uuid_to_peer(data->ioc_inlbuf1, &peer_nal, &peer_nid);
 304                 GOTO(out, err = 0);
 305         }
 306
 307         }
 308
 309         if (data->ioc_dev >= MAX_OBD_DEVICES) {
 310                 CERROR("OBD ioctl: No device\n");
 311                 GOTO(out, err = -EINVAL);
 312         }
 313         obd = &obd_dev[data->ioc_dev];
 314         if (!(obd && obd->obd_set_up) || obd->obd_stopping) {
 315                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 316                 GOTO(out, err = -EINVAL);
 317         }
 318
 319         switch(cmd) {
 320         case OBD_IOC_NO_TRANSNO: {
 321                 if (!obd->obd_attached) {
 322                         CERROR("Device %d not attached\n", obd->obd_minor);
 323                         GOTO(out, err = -ENODEV);
 324                 }
 325                 CDEBUG(D_IOCTL,
 326                        "disabling committed-transno notifications on %d\n",
 327                        obd->obd_minor);
 328                 obd->obd_no_transno = 1;
 329                 GOTO(out, err = 0);
 330         }
 331
 332         default: {
 333                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 334                 if (err)
 335                         GOTO(out, err);
 336
 337                 err = copy_to_user((void *)arg, data, len);
 338                 if (err)
 339                         err = -EFAULT;
 340                 GOTO(out, err);
 341         }
 342         }
 343
 344  out:
 345         if (buf)
 346                 obd_ioctl_freedata(buf, len);
 347         if (serialised)
 348                 up(&obd_conf_sem);
 349         RETURN(err);
 350 } /* class_handle_ioctl */
 351
 352
 353
 354 #define OBD_MINOR 241
 355 #ifdef __KERNEL__
 356 /* to control /dev/obd */
 357 static int obd_class_ioctl(struct inode *inode, struct file *filp,
 358                            unsigned int cmd, unsigned long arg)
 359 {
 360         return class_handle_ioctl(cmd, arg);
 361 }
 362
 363 /* declare character device */
 364 static struct file_operations obd_psdev_fops = {
 365         .owner   = THIS_MODULE,
 366         .ioctl   = obd_class_ioctl,     /* ioctl */
 367         .open    = obd_class_open,      /* open */
 368         .release = obd_class_release,   /* release */
 369 };
 370
 371 /* modules setup */
 372 static struct miscdevice obd_psdev = {
 373         .minor = OBD_MINOR,
 374         .name  = "obd_psdev",
 375         .fops  = &obd_psdev_fops,
 376 };
 377 #else
 378 void *obd_psdev = NULL;
 379 #endif
 380
 381 EXPORT_SYMBOL(obd_dev);
 382 EXPORT_SYMBOL(obdo_cachep);
 383 EXPORT_SYMBOL(obd_fail_loc);
 384 EXPORT_SYMBOL(obd_race_waitq);
 385 EXPORT_SYMBOL(obd_timeout);
 386 EXPORT_SYMBOL(obd_lustre_upcall);
 387 EXPORT_SYMBOL(obd_sync_filter);
 388 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 389 EXPORT_SYMBOL(ptlrpc_abort_inflight_superhack);
 390 EXPORT_SYMBOL(proc_lustre_root);
 391
 392 EXPORT_SYMBOL(class_register_type);
 393 EXPORT_SYMBOL(class_unregister_type);
 394 EXPORT_SYMBOL(class_get_type);
 395 EXPORT_SYMBOL(class_put_type);
 396 EXPORT_SYMBOL(class_name2dev);
 397 EXPORT_SYMBOL(class_name2obd);
 398 EXPORT_SYMBOL(class_uuid2dev);
 399 EXPORT_SYMBOL(class_uuid2obd);
 400 EXPORT_SYMBOL(class_find_client_obd);
 401 EXPORT_SYMBOL(class_devices_in_group);
 402 EXPORT_SYMBOL(__class_export_put);
 403 EXPORT_SYMBOL(class_new_export);
 404 EXPORT_SYMBOL(class_unlink_export);
 405 EXPORT_SYMBOL(class_import_get);
 406 EXPORT_SYMBOL(class_import_put);
 407 EXPORT_SYMBOL(class_new_import);
 408 EXPORT_SYMBOL(class_destroy_import);
 409 EXPORT_SYMBOL(class_connect);
 410 EXPORT_SYMBOL(class_conn2export);
 411 EXPORT_SYMBOL(class_exp2obd);
 412 EXPORT_SYMBOL(class_conn2obd);
 413 EXPORT_SYMBOL(class_exp2cliimp);
 414 EXPORT_SYMBOL(class_conn2cliimp);
 415 EXPORT_SYMBOL(class_disconnect);
 416 EXPORT_SYMBOL(class_disconnect_exports);
 417
 418 EXPORT_SYMBOL(oig_init);
 419 EXPORT_SYMBOL(oig_release);
 420 EXPORT_SYMBOL(oig_add_one);
 421 EXPORT_SYMBOL(oig_wait);
 422 EXPORT_SYMBOL(oig_complete_one);
 423
 424 /* uuid.c */
 425 EXPORT_SYMBOL(class_uuid_unparse);
 426 EXPORT_SYMBOL(lustre_uuid_to_peer);
 427
 428 EXPORT_SYMBOL(class_handle_hash);
 429 EXPORT_SYMBOL(class_handle_unhash);
 430 EXPORT_SYMBOL(class_handle2object);
 431
 432 /* config.c */
 433 EXPORT_SYMBOL(class_get_profile);
 434 EXPORT_SYMBOL(class_del_profile);
 435 EXPORT_SYMBOL(class_process_config);
 436 EXPORT_SYMBOL(class_config_parse_llog);
 437 EXPORT_SYMBOL(class_config_dump_llog);
 438 EXPORT_SYMBOL(class_attach);
 439 EXPORT_SYMBOL(class_setup);
 440 EXPORT_SYMBOL(class_cleanup);
 441 EXPORT_SYMBOL(class_detach);
 442
 443 #ifdef LPROCFS
 444 int obd_proc_read_version(char *page, char **start, off_t off, int count,
 445                           int *eof, void *data)
 446 {
 447         *eof = 1;
 448         return snprintf(page, count, "%s\n", BUILD_VERSION);
 449 }
 450
 451 int obd_proc_read_kernel_version(char *page, char **start, off_t off, int count,
 452                                  int *eof, void *data)
 453 {
 454         *eof = 1;
 455         return snprintf(page, count, "%u\n", LUSTRE_KERNEL_VERSION);
 456 }
 457
 458 int obd_proc_read_pinger(char *page, char **start, off_t off, int count,
 459                          int *eof, void *data)
 460 {
 461         *eof = 1;
 462         return snprintf(page, count, "%s\n",
 463 #ifdef ENABLE_PINGER
 464                         "on"
 465 #else
 466                         "off"
 467 #endif
 468                        );
 469 }
 470
 471 /* Root for /proc/fs/lustre */
 472 struct proc_dir_entry *proc_lustre_root = NULL;
 473 struct lprocfs_vars lprocfs_base[] = {
 474         { "version", obd_proc_read_version, NULL, NULL },
 475         { "kernel_version", obd_proc_read_kernel_version, NULL, NULL },
 476         { "pinger", obd_proc_read_pinger, NULL, NULL },
 477         { 0 }
 478 };
 479
 480 static void *obd_device_list_seq_start(struct seq_file *p, loff_t*pos)
 481 {
 482         if (*pos >= MAX_OBD_DEVICES)
 483                 return NULL;
 484         return &obd_dev[*pos];
 485 }
 486
 487 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 488 {
 489 }
 490
 491 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 492 {
 493         ++*pos;
 494         if (*pos >= MAX_OBD_DEVICES)
 495                 return NULL;
 496         return &obd_dev[*pos];
 497 }
 498
 499 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 500 {
 501         struct obd_device *obd = (struct obd_device *)v;
 502         int index = obd - &obd_dev[0];
 503         char *status;
 504
 505         if (!obd->obd_type)
 506                 return 0;
 507         if (obd->obd_stopping)
 508                 status = "ST";
 509         else if (obd->obd_set_up)
 510                 status = "UP";
 511         else if (obd->obd_attached)
 512                 status = "AT";
 513         else
 514                 status = "--";
 515
 516         return seq_printf(p, "%3d %s %s %s %s %d\n",
 517                           (int)index, status, obd->obd_type->typ_name,
 518                           obd->obd_name, obd->obd_uuid.uuid,
 519                           atomic_read(&obd->obd_refcount));
 520 }
 521
 522 struct seq_operations obd_device_list_sops = {
 523         .start = obd_device_list_seq_start,
 524         .stop = obd_device_list_seq_stop,
 525         .next = obd_device_list_seq_next,
 526         .show = obd_device_list_seq_show,
 527 };
 528
 529 static int obd_device_list_open(struct inode *inode, struct file *file)
 530 {
 531         struct proc_dir_entry *dp = PDE(inode);
 532         struct seq_file *seq;
 533         int rc = seq_open(file, &obd_device_list_sops);
 534
 535         if (rc)
 536                 return rc;
 537
 538         seq = file->private_data;
 539         seq->private = dp->data;
 540
 541         return 0;
 542 }
 543
 544 struct file_operations obd_device_list_fops = {
 545         .owner   = THIS_MODULE,
 546         .open    = obd_device_list_open,
 547         .read    = seq_read,
 548         .llseek  = seq_lseek,
 549         .release = seq_release,
 550 };
 551 #endif
 552
 553 #ifdef __KERNEL__
 554 static int __init init_obdclass(void)
 555 #else
 556 int init_obdclass(void)
 557 #endif
 558 {
 559         struct obd_device *obd;
 560 #ifdef LPROCFS
 561         struct proc_dir_entry *entry;
 562 #endif
 563         int err;
 564         int i;
 565
 566         printk(KERN_INFO "Lustre: OBD class driver Build Version: "
 567                BUILD_VERSION", info@clusterfs.com\n");
 568
 569         class_init_uuidlist();
 570         err = class_handle_init();
 571         if (err)
 572                 return err;
 573
 574         sema_init(&obd_conf_sem, 1);
 575         INIT_LIST_HEAD(&obd_types);
 576
 577         err = misc_register(&obd_psdev);
 578         if (err) {
 579                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 580                 return err;
 581         }
 582
 583         /* This struct is already zerod for us (static global) */
 584         for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
 585                 obd->obd_minor = i;
 586
 587         err = obd_init_caches();
 588         if (err)
 589                 return err;
 590
 591 #ifdef __KERNEL__
 592         obd_sysctl_init();
 593 #endif
 594
 595 #ifdef LPROCFS
 596         proc_lustre_root = proc_mkdir("lustre", proc_root_fs);
 597         if (!proc_lustre_root) {
 598                 printk(KERN_ERR
 599                        "LustreError: error registering /proc/fs/lustre\n");
 600                 RETURN(-ENOMEM);
 601         }
 602         proc_version = lprocfs_add_vars(proc_lustre_root, lprocfs_base, NULL);
 603         entry = create_proc_entry("devices", 0444, proc_lustre_root);
 604         if (entry == NULL) {
 605                 printk(KERN_ERR "LustreError: error registering "
 606                        "/proc/fs/lustre/devices\n");
 607                 lprocfs_remove(proc_lustre_root);
 608                 RETURN(-ENOMEM);
 609         }
 610         entry->proc_fops = &obd_device_list_fops;
 611 #endif
 612         return 0;
 613 }
 614
 615 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 616  * ifdef to the end of the file to cover module and versioning goo.*/
 617 #ifdef __KERNEL__
 618
 619 static void cleanup_obdclass(void)
 620 {
 621         int i;
 622         int leaked;
 623         ENTRY;
 624
 625         misc_deregister(&obd_psdev);
 626         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 627                 struct obd_device *obd = &obd_dev[i];
 628                 if (obd->obd_type && obd->obd_set_up &&
 629                     OBT(obd) && OBP(obd, detach)) {
 630                         /* XXX should this call generic detach otherwise? */
 631                         OBP(obd, detach)(obd);
 632                 }
 633         }
 634
 635         obd_cleanup_caches();
 636         obd_sysctl_clean();
 637 #ifdef LPROCFS
 638         if (proc_lustre_root) {
 639                 lprocfs_remove(proc_lustre_root);
 640                 proc_lustre_root = NULL;
 641         }
 642 #endif
 643
 644         class_handle_cleanup();
 645         class_exit_uuidlist();
 646
 647         leaked = atomic_read(&obd_memory);
 648         CDEBUG(leaked ? D_ERROR : D_INFO,
 649                "obd mem max: %d leaked: %d\n", obd_memmax, leaked);
 650
 651         EXIT;
 652 }
 653
 654 /* Check that we're building against the appropriate version of the Lustre
 655  * kernel patch */
 656 #include <linux/lustre_version.h>
 657 #define LUSTRE_MIN_VERSION 32
 658 #define LUSTRE_MAX_VERSION 36
 659 #if (LUSTRE_KERNEL_VERSION < LUSTRE_MIN_VERSION)
 660 # error Cannot continue: Your Lustre kernel patch is older than the sources
 661 #elif (LUSTRE_KERNEL_VERSION > LUSTRE_MAX_VERSION)
 662 # error Cannot continue: Your Lustre sources are older than the kernel patch
 663 #endif
 664
 665 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 666 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 667 MODULE_LICENSE("GPL");
 668
 669 module_init(init_obdclass);
 670 module_exit(cleanup_obdclass);
 671 #endif