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 = 20; /* 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
 241                 if (!err)
 242                         err = class_process_config(lcfg);
 243                 OBD_FREE(lcfg, data->ioc_plen1);
 244                 GOTO(out, err);
 245         }
 246
 247         case OBD_GET_VERSION:
 248                 if (!data->ioc_inlbuf1) {
 249                         CERROR("No buffer passed in ioctl\n");
 250                         GOTO(out, err = -EINVAL);
 251                 }
 252
 253                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 254                         CERROR("ioctl buffer too small to hold version\n");
 255                         GOTO(out, err = -EINVAL);
 256                 }
 257
 258                 memcpy(data->ioc_bulk, BUILD_VERSION,
 259                        strlen(BUILD_VERSION) + 1);
 260
 261                 err = copy_to_user((void *)arg, data, len);
 262                 if (err)
 263                         err = -EFAULT;
 264                 GOTO(out, err);
 265
 266         case OBD_IOC_NAME2DEV: {
 267                 /* Resolve a device name.  This does not change the
 268                  * currently selected device.
 269                  */
 270                 int dev;
 271
 272                 dev = class_resolve_dev_name(data->ioc_inllen1,
 273                                              data->ioc_inlbuf1);
 274                 data->ioc_dev = dev;
 275                 if (dev < 0)
 276                         GOTO(out, err = -EINVAL);
 277
 278                 err = copy_to_user((void *)arg, data, sizeof(*data));
 279                 if (err)
 280                         err = -EFAULT;
 281                 GOTO(out, err);
 282         }
 283
 284         case OBD_IOC_UUID2DEV: {
 285                 /* Resolve a device uuid.  This does not change the
 286                  * currently selected device.
 287                  */
 288                 int dev;
 289                 struct obd_uuid uuid;
 290
 291                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 292                         CERROR("No UUID passed!\n");
 293                         GOTO(out, err = -EINVAL);
 294                 }
 295                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 296                         CERROR("UUID not NUL terminated!\n");
 297                         GOTO(out, err = -EINVAL);
 298                 }
 299
 300                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 301                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 302                 dev = class_uuid2dev(&uuid);
 303                 data->ioc_dev = dev;
 304                 if (dev == -1) {
 305                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 306                                data->ioc_inlbuf1);
 307                         GOTO(out, err = -EINVAL);
 308                 }
 309
 310                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 311                        dev);
 312                 err = copy_to_user((void *)arg, data, sizeof(*data));
 313                 if (err)
 314                         err = -EFAULT;
 315                 GOTO(out, err);
 316         }
 317
 318
 319         case OBD_IOC_CLOSE_UUID: {
 320                 ptl_nid_t       peer_nid;
 321                 __u32           peer_nal;
 322                 CDEBUG(D_IOCTL, "closing all connections to uuid %s\n",
 323                        data->ioc_inlbuf1);
 324                 lustre_uuid_to_peer(data->ioc_inlbuf1, &peer_nal, &peer_nid);
 325                 GOTO(out, err = 0);
 326         }
 327
 328         }
 329
 330         if (data->ioc_dev >= MAX_OBD_DEVICES) {
 331                 CERROR("OBD ioctl: No device\n");
 332                 GOTO(out, err = -EINVAL);
 333         }
 334         obd = &obd_dev[data->ioc_dev];
 335         if (!(obd && obd->obd_set_up) || obd->obd_stopping) {
 336                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 337                 GOTO(out, err = -EINVAL);
 338         }
 339
 340         switch(cmd) {
 341         case OBD_IOC_NO_TRANSNO: {
 342                 if (!obd->obd_attached) {
 343                         CERROR("Device %d not attached\n", obd->obd_minor);
 344                         GOTO(out, err = -ENODEV);
 345                 }
 346                 CDEBUG(D_IOCTL,
 347                        "disabling committed-transno notifications on %d\n",
 348                        obd->obd_minor);
 349                 obd->obd_no_transno = 1;
 350                 GOTO(out, err = 0);
 351         }
 352
 353         default: {
 354                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 355                 if (err)
 356                         GOTO(out, err);
 357
 358                 err = copy_to_user((void *)arg, data, len);
 359                 if (err)
 360                         err = -EFAULT;
 361                 GOTO(out, err);
 362         }
 363         }
 364
 365  out:
 366         if (buf)
 367                 obd_ioctl_freedata(buf, len);
 368         RETURN(err);
 369 } /* class_handle_ioctl */
 370
 371
 372
 373 #define OBD_MINOR 241
 374 #ifdef __KERNEL__
 375 /* to control /dev/obd */
 376 static int obd_class_ioctl(struct inode *inode, struct file *filp,
 377                            unsigned int cmd, unsigned long arg)
 378 {
 379         return class_handle_ioctl(cmd, arg);
 380 }
 381
 382 /* declare character device */
 383 static struct file_operations obd_psdev_fops = {
 384         .owner   = THIS_MODULE,
 385         .ioctl   = obd_class_ioctl,     /* ioctl */
 386         .open    = obd_class_open,      /* open */
 387         .release = obd_class_release,   /* release */
 388 };
 389
 390 /* modules setup */
 391 static struct miscdevice obd_psdev = {
 392         .minor = OBD_MINOR,
 393         .name  = "obd",
 394         .fops  = &obd_psdev_fops,
 395 };
 396 #else
 397 void *obd_psdev = NULL;
 398 #endif
 399
 400 EXPORT_SYMBOL(obd_dev);
 401 EXPORT_SYMBOL(obd_fail_loc);
 402 EXPORT_SYMBOL(ll_set_rdonly);
 403 EXPORT_SYMBOL(ll_clear_rdonly);
 404 EXPORT_SYMBOL(obd_print_fail_loc);
 405 EXPORT_SYMBOL(obd_race_waitq);
 406 EXPORT_SYMBOL(obd_dump_on_timeout);
 407 EXPORT_SYMBOL(obd_timeout);
 408 EXPORT_SYMBOL(ldlm_timeout);
 409 EXPORT_SYMBOL(obd_lustre_upcall);
 410 EXPORT_SYMBOL(obd_sync_filter);
 411 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
 412 EXPORT_SYMBOL(ptlrpc_abort_inflight_superhack);
 413
 414 struct proc_dir_entry *proc_lustre_root;
 415 EXPORT_SYMBOL(proc_lustre_root);
 416
 417 EXPORT_SYMBOL(class_register_type);
 418 EXPORT_SYMBOL(class_unregister_type);
 419 EXPORT_SYMBOL(class_get_type);
 420 EXPORT_SYMBOL(class_put_type);
 421 EXPORT_SYMBOL(class_name2dev);
 422 EXPORT_SYMBOL(class_name2obd);
 423 EXPORT_SYMBOL(class_uuid2dev);
 424 EXPORT_SYMBOL(class_uuid2obd);
 425 EXPORT_SYMBOL(class_find_client_obd);
 426 EXPORT_SYMBOL(class_find_client_notype);
 427 EXPORT_SYMBOL(class_devices_in_group);
 428 EXPORT_SYMBOL(class_conn2export);
 429 EXPORT_SYMBOL(class_exp2obd);
 430 EXPORT_SYMBOL(class_conn2obd);
 431 EXPORT_SYMBOL(class_exp2cliimp);
 432 EXPORT_SYMBOL(class_conn2cliimp);
 433 EXPORT_SYMBOL(class_disconnect);
 434
 435 /* uuid.c */
 436 EXPORT_SYMBOL(class_uuid_unparse);
 437 EXPORT_SYMBOL(lustre_uuid_to_peer);
 438
 439 EXPORT_SYMBOL(class_handle_hash);
 440 EXPORT_SYMBOL(class_handle_unhash);
 441 EXPORT_SYMBOL(class_handle2object);
 442
 443 /* config.c */
 444 EXPORT_SYMBOL(class_get_profile);
 445 EXPORT_SYMBOL(class_del_profile);
 446 EXPORT_SYMBOL(class_process_config);
 447 EXPORT_SYMBOL(class_config_parse_llog);
 448 EXPORT_SYMBOL(class_config_dump_llog);
 449 EXPORT_SYMBOL(class_attach);
 450 EXPORT_SYMBOL(class_setup);
 451 EXPORT_SYMBOL(class_cleanup);
 452 EXPORT_SYMBOL(class_detach);
 453
 454 #ifdef LPROCFS
 455 int obd_proc_read_version(char *page, char **start, off_t off, int count,
 456                           int *eof, void *data)
 457 {
 458         *eof = 1;
 459         return snprintf(page, count, "%s\n", BUILD_VERSION);
 460 }
 461
 462 int obd_proc_read_kernel_version(char *page, char **start, off_t off, int count,
 463                                  int *eof, void *data)
 464 {
 465         *eof = 1;
 466         return snprintf(page, count, "%u\n", LUSTRE_KERNEL_VERSION);
 467 }
 468
 469 int obd_proc_read_pinger(char *page, char **start, off_t off, int count,
 470                          int *eof, void *data)
 471 {
 472         *eof = 1;
 473         return snprintf(page, count, "%s\n",
 474 #ifdef ENABLE_PINGER
 475                         "on"
 476 #else
 477                         "off"
 478 #endif
 479                        );
 480 }
 481
 482 /* Root for /proc/fs/lustre */
 483 struct lprocfs_vars lprocfs_base[] = {
 484         { "version", obd_proc_read_version, NULL, NULL },
 485         { "kernel_version", obd_proc_read_kernel_version, NULL, NULL },
 486         { "pinger", obd_proc_read_pinger, NULL, NULL },
 487         { 0 }
 488 };
 489 #else
 490 #define lprocfs_base NULL
 491 #endif /* LPROCFS */
 492
 493 #ifdef __KERNEL__
 494 static void *obd_device_list_seq_start(struct seq_file *p, loff_t*pos)
 495 {
 496         if (*pos >= MAX_OBD_DEVICES)
 497                 return NULL;
 498         return &obd_dev[*pos];
 499 }
 500
 501 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 502 {
 503 }
 504
 505 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 506 {
 507         ++*pos;
 508         if (*pos >= MAX_OBD_DEVICES)
 509                 return NULL;
 510         return &obd_dev[*pos];
 511 }
 512
 513 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 514 {
 515         struct obd_device *obd = (struct obd_device *)v;
 516         int index = obd - &obd_dev[0];
 517         char *status;
 518
 519         if (!obd->obd_type)
 520                 return 0;
 521         if (obd->obd_stopping)
 522                 status = "ST";
 523         else if (obd->obd_set_up)
 524                 status = "UP";
 525         else if (obd->obd_attached)
 526                 status = "AT";
 527         else
 528                 status = "--";
 529
 530         return seq_printf(p, "%3d %s %s %s %s %d\n",
 531                           (int)index, status, obd->obd_type->typ_name,
 532                           obd->obd_name, obd->obd_uuid.uuid,
 533                           atomic_read(&obd->obd_refcount));
 534 }
 535
 536 struct seq_operations obd_device_list_sops = {
 537         .start = obd_device_list_seq_start,
 538         .stop = obd_device_list_seq_stop,
 539         .next = obd_device_list_seq_next,
 540         .show = obd_device_list_seq_show,
 541 };
 542
 543 static int obd_device_list_open(struct inode *inode, struct file *file)
 544 {
 545         struct proc_dir_entry *dp = PDE(inode);
 546         struct seq_file *seq;
 547         int rc = seq_open(file, &obd_device_list_sops);
 548
 549         if (rc)
 550                 return rc;
 551
 552         seq = file->private_data;
 553         seq->private = dp->data;
 554
 555         return 0;
 556 }
 557
 558 struct file_operations obd_device_list_fops = {
 559         .owner   = THIS_MODULE,
 560         .open    = obd_device_list_open,
 561         .read    = seq_read,
 562         .llseek  = seq_lseek,
 563         .release = seq_release,
 564 };
 565 #endif
 566
 567 #define OBD_INIT_CHECK
 568 #ifdef OBD_INIT_CHECK
 569 int obd_init_checks(void)
 570 {
 571         __u64 u64val, div64val;
 572         char buf[64];
 573         int len, ret = 0;
 574
 575         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s, LPSZ=%s, LPSSZ=%s\n",
 576                LPU64, LPD64, LPX64, LPSZ, LPSSZ);
 577
 578         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 579
 580         u64val = OBD_OBJECT_EOF;
 581         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 582         if (u64val != OBD_OBJECT_EOF) {
 583                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 584                        u64val, (int)sizeof(u64val));
 585                 ret = -EINVAL;
 586         }
 587         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 588         if (len != 18) {
 589                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 590                 ret = -EINVAL;
 591         }
 592
 593         div64val = OBD_OBJECT_EOF;
 594         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 595         if (u64val != OBD_OBJECT_EOF) {
 596                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 597                        u64val, (int)sizeof(u64val));
 598                 ret = -EOVERFLOW;
 599         }
 600         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 601                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 602                        u64val, (int)sizeof(u64val));
 603                 return -EOVERFLOW;
 604         }
 605         if (do_div(div64val, 256) != (u64val & 255)) {
 606                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 607                 return -EOVERFLOW;
 608         }
 609         if (u64val >> 8 != div64val) {
 610                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 611                        u64val, div64val, u64val >> 8);
 612                 return -EOVERFLOW;
 613         }
 614         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 615         if (len != 18) {
 616                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 617                 ret = -EINVAL;
 618         }
 619         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 620         if (len != 20) {
 621                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 622                 ret = -EINVAL;
 623         }
 624         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 625         if (len != 2) {
 626                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 627                 ret = -EINVAL;
 628         }
 629         if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) {
 630                 CWARN("mask failed: u64val "LPU64" >= %lu\n", u64val,PAGE_SIZE);
 631                 ret = -EINVAL;
 632         }
 633
 634         return ret;
 635 }
 636 #else
 637 #define obd_init_checks() do {} while(0)
 638 #endif
 639
 640 #ifdef __KERNEL__
 641 static int __init init_obdclass(void)
 642 #else
 643 int init_obdclass(void)
 644 #endif
 645 {
 646         struct obd_device *obd;
 647 #ifdef __KERNEL__
 648         struct proc_dir_entry *entry;
 649 #endif
 650         int err;
 651         int i;
 652
 653         printk(KERN_INFO "Lustre: OBD class driver Build Version: "
 654                BUILD_VERSION", info@clusterfs.com\n");
 655
 656         err = obd_init_checks();
 657         if (err == -EOVERFLOW)
 658                 return err;
 659
 660         class_init_uuidlist();
 661         err = class_handle_init();
 662         if (err)
 663                 return err;
 664
 665         spin_lock_init(&obd_dev_lock);
 666         INIT_LIST_HEAD(&obd_types);
 667
 668         err = misc_register(&obd_psdev);
 669         if (err) {
 670                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 671                 return err;
 672         }
 673
 674         /* This struct is already zerod for us (static global) */
 675         for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
 676                 obd->obd_minor = i;
 677
 678         err = obd_init_caches();
 679         if (err)
 680                 return err;
 681
 682 #ifdef __KERNEL__
 683         obd_sysctl_init();
 684
 685         proc_lustre_root = proc_mkdir("lustre", proc_root_fs);
 686         if (!proc_lustre_root) {
 687                 printk(KERN_ERR
 688                        "LustreError: error registering /proc/fs/lustre\n");
 689                 RETURN(-ENOMEM);
 690         }
 691         proc_version = lprocfs_add_vars(proc_lustre_root, lprocfs_base, NULL);
 692         entry = create_proc_entry("devices", 0444, proc_lustre_root);
 693         if (entry == NULL) {
 694                 printk(KERN_ERR "LustreError: error registering "
 695                        "/proc/fs/lustre/devices\n");
 696                 lprocfs_remove(proc_lustre_root);
 697                 RETURN(-ENOMEM);
 698         }
 699         entry->proc_fops = &obd_device_list_fops;
 700 #endif
 701         return 0;
 702 }
 703
 704 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 705  * ifdef to the end of the file to cover module and versioning goo.*/
 706 #ifdef __KERNEL__
 707
 708 static void cleanup_obdclass(void)
 709 {
 710         int i;
 711         int leaked;
 712         ENTRY;
 713
 714         misc_deregister(&obd_psdev);
 715         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 716                 struct obd_device *obd = &obd_dev[i];
 717                 if (obd->obd_type && obd->obd_set_up &&
 718                     OBT(obd) && OBP(obd, detach)) {
 719                         /* XXX should this call generic detach otherwise? */
 720                         OBP(obd, detach)(obd);
 721                 }
 722         }
 723
 724         obd_cleanup_caches();
 725         obd_sysctl_clean();
 726
 727         if (proc_lustre_root) {
 728                 lprocfs_remove(proc_lustre_root);
 729                 proc_lustre_root = NULL;
 730         }
 731
 732         class_handle_cleanup();
 733         class_exit_uuidlist();
 734
 735         leaked = atomic_read(&obd_memory);
 736         CDEBUG(leaked ? D_ERROR : D_INFO,
 737                "obd mem max: %d leaked: %d\n", obd_memmax, leaked);
 738
 739         EXIT;
 740 }
 741
 742 /* Check that we're building against the appropriate version of the Lustre
 743  * kernel patch */
 744 #include <linux/lustre_version.h>
 745 #define LUSTRE_MIN_VERSION 32
 746 #define LUSTRE_MAX_VERSION 46
 747 #if (LUSTRE_KERNEL_VERSION < LUSTRE_MIN_VERSION)
 748 # error Cannot continue: Your Lustre kernel patch is older than the sources
 749 #elif (LUSTRE_KERNEL_VERSION > LUSTRE_MAX_VERSION)
 750 # error Cannot continue: Your Lustre sources are older than the kernel patch
 751 #endif
 752
 753 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 754 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 755 MODULE_LICENSE("GPL");
 756
 757 module_init(init_obdclass);
 758 module_exit(cleanup_obdclass);
 759 #endif