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 <libcfs/list.h>
  71 #include "llog_internal.h"
  72
  73 #ifndef __KERNEL__
  74 /* liblustre workaround */
  75 atomic_t portal_kmemory = {0};
  76 #endif
  77
  78 struct obd_device obd_dev[MAX_OBD_DEVICES];
  79 struct list_head obd_types;
  80 spinlock_t obd_dev_lock;
  81 #ifndef __KERNEL__
  82 atomic_t obd_memory;
  83 int obd_memmax;
  84 #endif
  85
  86 int proc_version;
  87
  88 /* The following are visible and mutable through /proc/sys/lustre/. */
  89 unsigned int obd_fail_loc;
  90 unsigned int obd_dump_on_timeout;
  91 unsigned int obd_timeout = 100; /* seconds */
  92 unsigned int ldlm_timeout = 6;  /* seconds */
  93 char obd_lustre_upcall[128] = "DEFAULT"; /* or NONE or /full/path/to/upcall  */
  94 unsigned int obd_sync_filter; /* = 0, don't sync by default */
  95
  96 DECLARE_WAIT_QUEUE_HEAD(obd_race_waitq);
  97
  98 #ifdef __KERNEL__
  99 unsigned int obd_print_fail_loc(void)
 100 {
 101         CWARN("obd_fail_loc = %x\n", obd_fail_loc);
 102         return obd_fail_loc;
 103 }
 104
 105 void ll_set_rdonly(ll_sbdev_type dev)
 106 {
 107         CDEBUG(D_IOCTL | D_HA, "set dev %ld rdonly\n", (long)dev);
 108         ll_sbdev_sync(dev);
 109 #ifdef HAVE_OLD_DEV_SET_RDONLY
 110         dev_set_rdonly(dev, 2);
 111 #else
 112         dev_set_rdonly(dev);
 113 #endif
 114 }
 115
 116 void ll_clear_rdonly(ll_sbdev_type dev)
 117 {
 118 #ifndef HAVE_CLEAR_RDONLY_ON_PUT
 119         CDEBUG(D_IOCTL | D_HA, "unset dev %ld rdonly\n", (long)dev);
 120         if (ll_check_rdonly(dev)) {
 121                 ll_sbdev_sync(dev);
 122 #ifdef HAVE_OLD_DEV_SET_RDONLY
 123                 dev_clear_rdonly(2);
 124 #else
 125                 dev_clear_rdonly(dev);
 126 #endif
 127         }
 128 #else
 129         CDEBUG(D_IOCTL | D_HA, "(will unset dev %ld rdonly on put)\n",
 130                (long)dev);
 131 #endif
 132 }
 133
 134 /*  opening /dev/obd */
 135 static int obd_class_open(struct inode * inode, struct file * file)
 136 {
 137         ENTRY;
 138
 139         PORTAL_MODULE_USE;
 140         RETURN(0);
 141 }
 142
 143 /*  closing /dev/obd */
 144 static int obd_class_release(struct inode * inode, struct file * file)
 145 {
 146         ENTRY;
 147
 148         PORTAL_MODULE_UNUSE;
 149         RETURN(0);
 150 }
 151 #endif
 152
 153 static inline void obd_data2conn(struct lustre_handle *conn,
 154                                  struct obd_ioctl_data *data)
 155 {
 156         memset(conn, 0, sizeof *conn);
 157         conn->cookie = data->ioc_cookie;
 158 }
 159
 160 static inline void obd_conn2data(struct obd_ioctl_data *data,
 161                                  struct lustre_handle *conn)
 162 {
 163         data->ioc_cookie = conn->cookie;
 164 }
 165
 166 int class_resolve_dev_name(uint32_t len, char *name)
 167 {
 168         int rc;
 169         int dev;
 170
 171         if (!len || !name) {
 172                 CERROR("No name passed,!\n");
 173                 GOTO(out, rc = -EINVAL);
 174         }
 175         if (name[len - 1] != 0) {
 176                 CERROR("Name not nul terminated!\n");
 177                 GOTO(out, rc = -EINVAL);
 178         }
 179
 180         CDEBUG(D_IOCTL, "device name %s\n", name);
 181         dev = class_name2dev(name);
 182         if (dev == -1) {
 183                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 184                 GOTO(out, rc = -EINVAL);
 185         }
 186
 187         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 188         rc = dev;
 189
 190 out:
 191         RETURN(rc);
 192 }
 193
 194 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 195 {
 196         char *buf = NULL;
 197         struct obd_ioctl_data *data;
 198         struct portals_debug_ioctl_data *debug_data;
 199         struct obd_device *obd = NULL;
 200         int err = 0, len = 0;
 201         ENTRY;
 202
 203         if (current->fsuid != 0)
 204                 RETURN(err = -EACCES);
 205
 206         if ((cmd & 0xffffff00) == ((int)'T') << 8) /* ignore all tty ioctls */
 207                 RETURN(err = -ENOTTY);
 208
 209         /* only for debugging */
 210         if (cmd == PTL_IOC_DEBUG_MASK) {
 211                 debug_data = (struct portals_debug_ioctl_data*)arg;
 212                 portal_subsystem_debug = debug_data->subs;
 213                 portal_debug = debug_data->debug;
 214                 return 0;
 215         }
 216
 217         CDEBUG(D_IOCTL, "cmd = %x, obd = %p\n", cmd, obd);
 218         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 219                 CERROR("OBD ioctl: data error\n");
 220                 GOTO(out, err = -EINVAL);
 221         }
 222         data = (struct obd_ioctl_data *)buf;
 223
 224         switch (cmd) {
 225         case OBD_IOC_PROCESS_CFG: {
 226                 struct lustre_cfg *lcfg;
 227
 228                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 229                         CERROR("No config buffer passed!\n");
 230                         GOTO(out, err = -EINVAL);
 231                 }
 232
 233                 err = lustre_cfg_sanity_check(data->ioc_pbuf1,
 234                                               data->ioc_plen1);
 235                 if (err)
 236                         GOTO(out, err);
 237
 238                 OBD_ALLOC(lcfg, data->ioc_plen1);
 239                 err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1);
 240                 if (err)
 241                         GOTO(out, err);
 242
 243                 err = class_process_config(lcfg);
 244                 OBD_FREE(lcfg, data->ioc_plen1);
 245                 GOTO(out, err);
 246         }
 247
 248         case OBD_GET_VERSION:
 249                 if (!data->ioc_inlbuf1) {
 250                         CERROR("No buffer passed in ioctl\n");
 251                         GOTO(out, err = -EINVAL);
 252                 }
 253
 254                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 255                         CERROR("ioctl buffer too small to hold version\n");
 256                         GOTO(out, err = -EINVAL);
 257                 }
 258
 259                 memcpy(data->ioc_bulk, BUILD_VERSION,
 260                        strlen(BUILD_VERSION) + 1);
 261
 262                 err = copy_to_user((void *)arg, data, len);
 263                 if (err)
 264                         err = -EFAULT;
 265                 GOTO(out, err);
 266
 267         case OBD_IOC_NAME2DEV: {
 268                 /* Resolve a device name.  This does not change the
 269                  * currently selected device.
 270                  */
 271                 int dev;
 272
 273                 dev = class_resolve_dev_name(data->ioc_inllen1,
 274                                              data->ioc_inlbuf1);
 275                 data->ioc_dev = dev;
 276                 if (dev < 0)
 277                         GOTO(out, err = -EINVAL);
 278
 279                 err = copy_to_user((void *)arg, data, sizeof(*data));
 280                 if (err)
 281                         err = -EFAULT;
 282                 GOTO(out, err);
 283         }
 284
 285         case OBD_IOC_UUID2DEV: {
 286                 /* Resolve a device uuid.  This does not change the
 287                  * currently selected device.
 288                  */
 289                 int dev;
 290                 struct obd_uuid uuid;
 291
 292                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 293                         CERROR("No UUID passed!\n");
 294                         GOTO(out, err = -EINVAL);
 295                 }
 296                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 297                         CERROR("UUID not NUL terminated!\n");
 298                         GOTO(out, err = -EINVAL);
 299                 }
 300
 301                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 302                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 303                 dev = class_uuid2dev(&uuid);
 304                 data->ioc_dev = dev;
 305                 if (dev == -1) {
 306                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 307                                data->ioc_inlbuf1);
 308                         GOTO(out, err = -EINVAL);
 309                 }
 310
 311                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 312                        dev);
 313                 err = copy_to_user((void *)arg, data, sizeof(*data));
 314                 if (err)
 315                         err = -EFAULT;
 316                 GOTO(out, err);
 317         }
 318
 319
 320         case OBD_IOC_CLOSE_UUID: {
 321                 ptl_nid_t       peer_nid;
 322                 __u32           peer_nal;
 323                 CDEBUG(D_IOCTL, "closing all connections to uuid %s\n",
 324                        data->ioc_inlbuf1);
 325                 lustre_uuid_to_peer(data->ioc_inlbuf1, &peer_nal, &peer_nid);
 326                 GOTO(out, err = 0);
 327         }
 328
 329         }
 330
 331         if (data->ioc_dev >= MAX_OBD_DEVICES) {
 332                 CERROR("OBD ioctl: No device\n");
 333                 GOTO(out, err = -EINVAL);
 334         }
 335         obd = &obd_dev[data->ioc_dev];
 336         if (!(obd && obd->obd_set_up) || obd->obd_stopping) {
 337                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 338                 GOTO(out, err = -EINVAL);
 339         }
 340
 341         switch(cmd) {
 342         case OBD_IOC_NO_TRANSNO: {
 343                 if (!obd->obd_attached) {
 344                         CERROR("Device %d not attached\n", obd->obd_minor);
 345                         GOTO(out, err = -ENODEV);
 346                 }
 347                 CDEBUG(D_IOCTL,
 348                        "disabling committed-transno notifications on %d\n",
 349                        obd->obd_minor);
 350                 obd->obd_no_transno = 1;
 351                 GOTO(out, err = 0);
 352         }
 353
 354         default: {
 355                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 356                 if (err)
 357                         GOTO(out, err);
 358
 359                 err = copy_to_user((void *)arg, data, len);
 360                 if (err)
 361                         err = -EFAULT;
 362                 GOTO(out, err);
 363         }
 364         }
 365
 366  out:
 367         if (buf)
 368                 obd_ioctl_freedata(buf, len);
 369         RETURN(err);
 370 } /* class_handle_ioctl */
 371
 372
 373
 374 #define OBD_MINOR 241
 375 #ifdef __KERNEL__
 376 /* to control /dev/obd */
 377 static int obd_class_ioctl(struct inode *inode, struct file *filp,
 378                            unsigned int cmd, unsigned long arg)
 379 {
 380         return class_handle_ioctl(cmd, arg);
 381 }
 382
 383 /* declare character device */
 384 static struct file_operations obd_psdev_fops = {
 385         .owner   = THIS_MODULE,
 386         .ioctl   = obd_class_ioctl,     /* ioctl */
 387         .open    = obd_class_open,      /* open */
 388         .release = obd_class_release,   /* release */
 389 };
 390
 391 /* modules setup */
 392 static struct miscdevice obd_psdev = {
 393         .minor = OBD_MINOR,
 394         .name  = "obd_psdev",
 395         .fops  = &obd_psdev_fops,
 396 };
 397 #else
 398 void *obd_psdev = NULL;
 399 #endif
 400
 401 EXPORT_SYMBOL(obd_dev);
 402 EXPORT_SYMBOL(obdo_cachep);
 403 EXPORT_SYMBOL(qunit_cachep);
 404 EXPORT_SYMBOL(qunit_hash_lock);
 405 EXPORT_SYMBOL(qunit_hash);
 406 EXPORT_SYMBOL(obd_fail_loc);
 407 EXPORT_SYMBOL(ll_set_rdonly);
 408 EXPORT_SYMBOL(ll_clear_rdonly);
 409 EXPORT_SYMBOL(obd_print_fail_loc);
 410 EXPORT_SYMBOL(obd_race_waitq);
 411 EXPORT_SYMBOL(obd_dump_on_timeout);
 412 EXPORT_SYMBOL(obd_timeout);
 413 EXPORT_SYMBOL(ldlm_timeout);
 414 EXPORT_SYMBOL(obd_lustre_upcall);
 415 EXPORT_SYMBOL(obd_sync_filter);
 416 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 417 EXPORT_SYMBOL(ptlrpc_abort_inflight_superhack);
 418 EXPORT_SYMBOL(proc_lustre_root);
 419
 420 EXPORT_SYMBOL(class_register_type);
 421 EXPORT_SYMBOL(class_unregister_type);
 422 EXPORT_SYMBOL(class_get_type);
 423 EXPORT_SYMBOL(class_put_type);
 424 EXPORT_SYMBOL(class_name2dev);
 425 EXPORT_SYMBOL(class_name2obd);
 426 EXPORT_SYMBOL(class_uuid2dev);
 427 EXPORT_SYMBOL(class_uuid2obd);
 428 EXPORT_SYMBOL(class_find_client_obd);
 429 EXPORT_SYMBOL(class_find_client_notype);
 430 EXPORT_SYMBOL(class_devices_in_group);
 431 EXPORT_SYMBOL(__class_export_put);
 432 EXPORT_SYMBOL(class_new_export);
 433 EXPORT_SYMBOL(class_unlink_export);
 434 EXPORT_SYMBOL(class_import_get);
 435 EXPORT_SYMBOL(class_import_put);
 436 EXPORT_SYMBOL(class_new_import);
 437 EXPORT_SYMBOL(class_destroy_import);
 438 EXPORT_SYMBOL(class_connect);
 439 EXPORT_SYMBOL(class_conn2export);
 440 EXPORT_SYMBOL(class_exp2obd);
 441 EXPORT_SYMBOL(class_conn2obd);
 442 EXPORT_SYMBOL(class_exp2cliimp);
 443 EXPORT_SYMBOL(class_conn2cliimp);
 444 EXPORT_SYMBOL(class_disconnect);
 445 EXPORT_SYMBOL(class_disconnect_exports);
 446 EXPORT_SYMBOL(class_disconnect_stale_exports);
 447 EXPORT_SYMBOL(class_update_export_timer);
 448
 449 EXPORT_SYMBOL(oig_init);
 450 EXPORT_SYMBOL(oig_release);
 451 EXPORT_SYMBOL(oig_add_one);
 452 EXPORT_SYMBOL(oig_wait);
 453 EXPORT_SYMBOL(oig_complete_one);
 454
 455 EXPORT_SYMBOL(ping_evictor_start);
 456 EXPORT_SYMBOL(ping_evictor_stop);
 457
 458 /* uuid.c */
 459 EXPORT_SYMBOL(class_uuid_unparse);
 460 EXPORT_SYMBOL(lustre_uuid_to_peer);
 461
 462 EXPORT_SYMBOL(class_handle_hash);
 463 EXPORT_SYMBOL(class_handle_unhash);
 464 EXPORT_SYMBOL(class_handle2object);
 465
 466 /* config.c */
 467 EXPORT_SYMBOL(class_get_profile);
 468 EXPORT_SYMBOL(class_del_profile);
 469 EXPORT_SYMBOL(class_process_config);
 470 EXPORT_SYMBOL(class_config_parse_llog);
 471 EXPORT_SYMBOL(class_config_dump_llog);
 472 EXPORT_SYMBOL(class_attach);
 473 EXPORT_SYMBOL(class_setup);
 474 EXPORT_SYMBOL(class_cleanup);
 475 EXPORT_SYMBOL(class_detach);
 476
 477 #ifdef LPROCFS
 478 int obd_proc_read_version(char *page, char **start, off_t off, int count,
 479                           int *eof, void *data)
 480 {
 481         *eof = 1;
 482         return snprintf(page, count, "%s\n", BUILD_VERSION);
 483 }
 484
 485 int obd_proc_read_kernel_version(char *page, char **start, off_t off, int count,
 486                                  int *eof, void *data)
 487 {
 488         *eof = 1;
 489         return snprintf(page, count, "%u\n", LUSTRE_KERNEL_VERSION);
 490 }
 491
 492 int obd_proc_read_pinger(char *page, char **start, off_t off, int count,
 493                          int *eof, void *data)
 494 {
 495         *eof = 1;
 496         return snprintf(page, count, "%s\n",
 497 #ifdef ENABLE_PINGER
 498                         "on"
 499 #else
 500                         "off"
 501 #endif
 502                        );
 503 }
 504
 505 /* Root for /proc/fs/lustre */
 506 struct proc_dir_entry *proc_lustre_root = NULL;
 507 struct lprocfs_vars lprocfs_base[] = {
 508         { "version", obd_proc_read_version, NULL, NULL },
 509         { "kernel_version", obd_proc_read_kernel_version, NULL, NULL },
 510         { "pinger", obd_proc_read_pinger, NULL, NULL },
 511         { 0 }
 512 };
 513
 514 static void *obd_device_list_seq_start(struct seq_file *p, loff_t*pos)
 515 {
 516         if (*pos >= MAX_OBD_DEVICES)
 517                 return NULL;
 518         return &obd_dev[*pos];
 519 }
 520
 521 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 522 {
 523 }
 524
 525 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 526 {
 527         ++*pos;
 528         if (*pos >= MAX_OBD_DEVICES)
 529                 return NULL;
 530         return &obd_dev[*pos];
 531 }
 532
 533 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 534 {
 535         struct obd_device *obd = (struct obd_device *)v;
 536         int index = obd - &obd_dev[0];
 537         char *status;
 538
 539         if (!obd->obd_type)
 540                 return 0;
 541         if (obd->obd_stopping)
 542                 status = "ST";
 543         else if (obd->obd_set_up)
 544                 status = "UP";
 545         else if (obd->obd_attached)
 546                 status = "AT";
 547         else
 548                 status = "--";
 549
 550         return seq_printf(p, "%3d %s %s %s %s %d\n",
 551                           (int)index, status, obd->obd_type->typ_name,
 552                           obd->obd_name, obd->obd_uuid.uuid,
 553                           atomic_read(&obd->obd_refcount));
 554 }
 555
 556 struct seq_operations obd_device_list_sops = {
 557         .start = obd_device_list_seq_start,
 558         .stop = obd_device_list_seq_stop,
 559         .next = obd_device_list_seq_next,
 560         .show = obd_device_list_seq_show,
 561 };
 562
 563 static int obd_device_list_open(struct inode *inode, struct file *file)
 564 {
 565         struct proc_dir_entry *dp = PDE(inode);
 566         struct seq_file *seq;
 567         int rc = seq_open(file, &obd_device_list_sops);
 568
 569         if (rc)
 570                 return rc;
 571
 572         seq = file->private_data;
 573         seq->private = dp->data;
 574
 575         return 0;
 576 }
 577
 578 struct file_operations obd_device_list_fops = {
 579         .owner   = THIS_MODULE,
 580         .open    = obd_device_list_open,
 581         .read    = seq_read,
 582         .llseek  = seq_lseek,
 583         .release = seq_release,
 584 };
 585 #endif
 586
 587 #define OBD_INIT_CHECK
 588 #ifdef OBD_INIT_CHECK
 589 int obd_init_checks(void)
 590 {
 591         __u64 u64val, div64val;
 592         char buf[64];
 593         int len, ret = 0;
 594
 595         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s, LPSZ=%s, LPSSZ=%s\n",
 596                LPU64, LPD64, LPX64, LPSZ, LPSSZ);
 597
 598         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", OBD_OBJECT_EOF);
 599
 600         u64val = OBD_OBJECT_EOF;
 601         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 602         if (u64val != OBD_OBJECT_EOF) {
 603                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 604                        u64val, sizeof(u64val));
 605                 ret = -EINVAL;
 606         }
 607         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 608         if (len != 18) {
 609                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 610                 ret = -EINVAL;
 611         }
 612
 613         div64val = OBD_OBJECT_EOF;
 614         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 615         if (u64val != OBD_OBJECT_EOF) {
 616                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 617                        u64val, sizeof(u64val));
 618                 ret = -EOVERFLOW;
 619         }
 620         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 621                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 622                        u64val, sizeof(u64val));
 623                 return -EOVERFLOW;
 624         }
 625         if (do_div(div64val, 256) != (u64val & 255)) {
 626                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 627                 return -EOVERFLOW;
 628         }
 629         if (u64val >> 8 != div64val) {
 630                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 631                        u64val, div64val, u64val >> 8);
 632                 return -EOVERFLOW;
 633         }
 634         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 635         if (len != 18) {
 636                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 637                 ret = -EINVAL;
 638         }
 639         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 640         if (len != 20) {
 641                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 642                 ret = -EINVAL;
 643         }
 644         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 645         if (len != 2) {
 646                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 647                 ret = -EINVAL;
 648         }
 649         if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) {
 650                 CWARN("mask failed: u64val "LPU64" >= %lu\n", u64val,PAGE_SIZE);
 651                 ret = -EINVAL;
 652         }
 653
 654         return ret;
 655 }
 656 #else
 657 #define obd_init_checks() do {} while(0)
 658 #endif
 659
 660 #ifdef __KERNEL__
 661 static int __init init_obdclass(void)
 662 #else
 663 int init_obdclass(void)
 664 #endif
 665 {
 666         struct obd_device *obd;
 667 #ifdef LPROCFS
 668         struct proc_dir_entry *entry;
 669 #endif
 670         int err;
 671         int i;
 672
 673         printk(KERN_INFO "Lustre: OBD class driver Build Version: "
 674                BUILD_VERSION", info@clusterfs.com\n");
 675
 676         err = obd_init_checks();
 677         if (err == -EOVERFLOW)
 678                 return err;
 679
 680         class_init_uuidlist();
 681         err = class_handle_init();
 682         if (err)
 683                 return err;
 684
 685         spin_lock_init(&obd_dev_lock);
 686         INIT_LIST_HEAD(&obd_types);
 687
 688         err = misc_register(&obd_psdev);
 689         if (err) {
 690                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 691                 return err;
 692         }
 693
 694         /* This struct is already zerod for us (static global) */
 695         for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
 696                 obd->obd_minor = i;
 697
 698         err = obd_init_caches();
 699         if (err)
 700                 return err;
 701
 702 #ifdef __KERNEL__
 703         obd_sysctl_init();
 704 #endif
 705
 706 #ifdef LPROCFS
 707         proc_lustre_root = proc_mkdir("lustre", proc_root_fs);
 708         if (!proc_lustre_root) {
 709                 printk(KERN_ERR
 710                        "LustreError: error registering /proc/fs/lustre\n");
 711                 RETURN(-ENOMEM);
 712         }
 713         proc_version = lprocfs_add_vars(proc_lustre_root, lprocfs_base, NULL);
 714         entry = create_proc_entry("devices", 0444, proc_lustre_root);
 715         if (entry == NULL) {
 716                 printk(KERN_ERR "LustreError: error registering "
 717                        "/proc/fs/lustre/devices\n");
 718                 lprocfs_remove(proc_lustre_root);
 719                 RETURN(-ENOMEM);
 720         }
 721         entry->proc_fops = &obd_device_list_fops;
 722 #endif
 723         return 0;
 724 }
 725
 726 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 727  * ifdef to the end of the file to cover module and versioning goo.*/
 728 #ifdef __KERNEL__
 729
 730 static void cleanup_obdclass(void)
 731 {
 732         int i;
 733         int leaked;
 734         ENTRY;
 735
 736         misc_deregister(&obd_psdev);
 737         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 738                 struct obd_device *obd = &obd_dev[i];
 739                 if (obd->obd_type && obd->obd_set_up &&
 740                     OBT(obd) && OBP(obd, detach)) {
 741                         /* XXX should this call generic detach otherwise? */
 742                         OBP(obd, detach)(obd);
 743                 }
 744         }
 745
 746         obd_cleanup_caches();
 747         obd_sysctl_clean();
 748 #ifdef LPROCFS
 749         if (proc_lustre_root) {
 750                 lprocfs_remove(proc_lustre_root);
 751                 proc_lustre_root = NULL;
 752         }
 753 #endif
 754
 755         class_handle_cleanup();
 756         class_exit_uuidlist();
 757
 758         leaked = atomic_read(&obd_memory);
 759         CDEBUG(leaked ? D_ERROR : D_INFO,
 760                "obd mem max: %d leaked: %d\n", obd_memmax, leaked);
 761
 762         EXIT;
 763 }
 764
 765 /* Check that we're building against the appropriate version of the Lustre
 766  * kernel patch */
 767 #include <linux/lustre_version.h>
 768 #define LUSTRE_MIN_VERSION 32
 769 #define LUSTRE_MAX_VERSION 45
 770 #if (LUSTRE_KERNEL_VERSION < LUSTRE_MIN_VERSION)
 771 # error Cannot continue: Your Lustre kernel patch is older than the sources
 772 #elif (LUSTRE_KERNEL_VERSION > LUSTRE_MAX_VERSION)
 773 # error Cannot continue: Your Lustre sources are older than the kernel patch
 774 #endif
 775
 776 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 777 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 778 MODULE_LICENSE("GPL");
 779
 780 module_init(init_obdclass);
 781 module_exit(cleanup_obdclass);
 782 #endif