lustre/lvfs/lvfs_linux.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  lustre/lib/lvfs_linux.c
   5  *  Lustre filesystem abstraction routines
   6  *
   7  *  Copyright (C) 2002, 2003 Cluster File Systems, Inc.
   8  *   Author: Andreas Dilger <adilger@clusterfs.com>
   9  *
  10  *   This file is part of Lustre, http://www.lustre.org.
  11  *
  12  *   Lustre is free software; you can redistribute it and/or
  13  *   modify it under the terms of version 2 of the GNU General Public
  14  *   License as published by the Free Software Foundation.
  15  *
  16  *   Lustre is distributed in the hope that it will be useful,
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *   GNU General Public License for more details.
  20  *
  21  *   You should have received a copy of the GNU General Public License
  22  *   along with Lustre; if not, write to the Free Software
  23  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #ifndef EXPORT_SYMTAB
  27 # define EXPORT_SYMTAB
  28 #endif
  29
  30 #define DEBUG_SUBSYSTEM S_FILTER
  31
  32 #include <linux/version.h>
  33 #include <linux/fs.h>
  34 #include <asm/unistd.h>
  35 #include <linux/slab.h>
  36 #include <linux/pagemap.h>
  37 #include <linux/quotaops.h>
  38 #include <linux/version.h>
  39 #include <libcfs/kp30.h>
  40 #include <linux/lustre_fsfilt.h>
  41 #include <linux/obd.h>
  42 #include <linux/obd_class.h>
  43 #include <linux/module.h>
  44 #include <linux/init.h>
  45 #include <linux/lustre_compat25.h>
  46 #include <linux/lvfs.h>
  47 #include "lvfs_internal.h"
  48
  49 #include <linux/obd.h>
  50 #include <linux/lustre_lib.h>
  51 #include <linux/lustre_mds.h>   /* for mds_grp_hash_entry */
  52
  53 atomic_t obd_memory;
  54 int obd_memmax;
  55
  56 /* Debugging check only needed during development */
  57 #ifdef OBD_CTXT_DEBUG
  58 # define ASSERT_CTXT_MAGIC(magic) LASSERT((magic) == OBD_RUN_CTXT_MAGIC)
  59 # define ASSERT_NOT_KERNEL_CTXT(msg) LASSERTF(!segment_eq(get_fs(), get_ds()),\
  60                                               msg)
  61 # define ASSERT_KERNEL_CTXT(msg) LASSERTF(segment_eq(get_fs(), get_ds()), msg)
  62
  63 #else
  64 # define ASSERT_CTXT_MAGIC(magic) do {} while(0)
  65 # define ASSERT_NOT_KERNEL_CTXT(msg) do {} while(0)
  66 # define ASSERT_KERNEL_CTXT(msg) do {} while(0)
  67 #endif
  68
  69 static void push_group_info(struct lvfs_run_ctxt *save,
  70                             struct group_info *ginfo)
  71 {
  72         if (!ginfo) {
  73                 save->ngroups = current_ngroups;
  74                 current_ngroups = 0;
  75         } else {
  76 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
  77                 task_lock(current);
  78                 save->group_info = current->group_info;
  79                 current->group_info = ginfo;
  80                 task_unlock(current);
  81 #else
  82                 LASSERT(ginfo->ngroups <= NGROUPS);
  83                 /* save old */
  84                 save->group_info.ngroups = current->ngroups;
  85                 if (current->ngroups)
  86                         memcpy(save->group_info.small_block, current->groups,
  87                                current->ngroups);
  88                 /* push new */
  89                 current->ngroups = ginfo->ngroups;
  90                 if (ginfo->ngroups)
  91                         memcpy(current->groups, ginfo->small_block,
  92                                current->ngroups);
  93 #endif
  94         }
  95 }
  96
  97 static void pop_group_info(struct lvfs_run_ctxt *save,
  98                            struct group_info *ginfo)
  99 {
 100         if (!ginfo) {
 101                 current_ngroups = save->ngroups;
 102         } else {
 103 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4)
 104                 task_lock(current);
 105                 current->group_info = save->group_info;
 106                 task_unlock(current);
 107 #else
 108                 current->ngroups = ginfo->ngroups;
 109                 if (current->ngroups)
 110                         memcpy(current->groups, save->group_info.small_block,
 111                                current->ngroups);
 112 #endif
 113         }
 114 }
 115
 116 /* push / pop to root of obd store */
 117 void push_ctxt(struct lvfs_run_ctxt *save, struct lvfs_run_ctxt *new_ctx,
 118                struct lvfs_ucred *uc)
 119 {
 120         //ASSERT_NOT_KERNEL_CTXT("already in kernel context!\n");
 121         ASSERT_CTXT_MAGIC(new_ctx->magic);
 122         LASSERT(save->magic != OBD_RUN_CTXT_MAGIC || save->pid != current->pid);
 123         OBD_SET_CTXT_MAGIC(save);
 124         save->pid = current->pid;
 125
 126         /*
 127         CDEBUG(D_INFO,
 128                "= push %p->%p = cur fs %p pwd %p:d%d:i%d (%.*s), pwdmnt %p:%d\n",
 129                save, current, current->fs, current->fs->pwd,
 130                atomic_read(&current->fs->pwd->d_count),
 131                atomic_read(&current->fs->pwd->d_inode->i_count),
 132                current->fs->pwd->d_name.len, current->fs->pwd->d_name.name,
 133                current->fs->pwdmnt,
 134                atomic_read(&current->fs->pwdmnt->mnt_count));
 135         */
 136
 137         save->fs = get_fs();
 138         LASSERT(atomic_read(&current->fs->pwd->d_count));
 139         LASSERT(atomic_read(&new_ctx->pwd->d_count));
 140         save->pwd = dget(current->fs->pwd);
 141         save->pwdmnt = mntget(current->fs->pwdmnt);
 142         save->ngroups = current_ngroups;
 143         save->luc.luc_umask = current->fs->umask;
 144
 145         LASSERT(save->pwd);
 146         LASSERT(save->pwdmnt);
 147         LASSERT(new_ctx->pwd);
 148         LASSERT(new_ctx->pwdmnt);
 149
 150         if (uc) {
 151                 save->luc.luc_uid = current->uid;
 152                 save->luc.luc_gid = current->gid;
 153                 save->luc.luc_fsuid = current->fsuid;
 154                 save->luc.luc_fsgid = current->fsgid;
 155                 save->luc.luc_cap = current->cap_effective;
 156                 save->luc.luc_nid = current->user->nid;
 157
 158                 current->uid = uc->luc_uid;
 159                 current->gid = uc->luc_gid;
 160                 current->fsuid = uc->luc_fsuid;
 161                 current->fsgid = uc->luc_fsgid;
 162                 current->cap_effective = uc->luc_cap;
 163                 current->user->nid = uc->luc_nid;
 164
 165                 push_group_info(save, uc->luc_ginfo);
 166         }
 167         current->fs->umask = 0; /* umask already applied on client */
 168         set_fs(new_ctx->fs);
 169         set_fs_pwd(current->fs, new_ctx->pwdmnt, new_ctx->pwd);
 170
 171         /*
 172         CDEBUG(D_INFO,
 173                "= push %p->%p = cur fs %p pwd %p:d%d:i%d (%.*s), pwdmnt %p:%d\n",
 174                new_ctx, current, current->fs, current->fs->pwd,
 175                atomic_read(&current->fs->pwd->d_count),
 176                atomic_read(&current->fs->pwd->d_inode->i_count),
 177                current->fs->pwd->d_name.len, current->fs->pwd->d_name.name,
 178                current->fs->pwdmnt,
 179                atomic_read(&current->fs->pwdmnt->mnt_count));
 180         */
 181 }
 182 EXPORT_SYMBOL(push_ctxt);
 183
 184 void pop_ctxt(struct lvfs_run_ctxt *saved, struct lvfs_run_ctxt *new_ctx,
 185               struct lvfs_ucred *uc)
 186 {
 187         //printk("pc0");
 188         ASSERT_CTXT_MAGIC(saved->magic);
 189         LASSERT(saved->pid == current->pid);
 190         saved->magic = 0;
 191         saved->pid = 0;
 192         //printk("pc1");
 193         ASSERT_KERNEL_CTXT("popping non-kernel context!\n");
 194
 195         /*
 196         CDEBUG(D_INFO,
 197                " = pop  %p==%p = cur %p pwd %p:d%d:i%d (%.*s), pwdmnt %p:%d\n",
 198                new_ctx, current, current->fs, current->fs->pwd,
 199                atomic_read(&current->fs->pwd->d_count),
 200                atomic_read(&current->fs->pwd->d_inode->i_count),
 201                current->fs->pwd->d_name.len, current->fs->pwd->d_name.name,
 202                current->fs->pwdmnt,
 203                atomic_read(&current->fs->pwdmnt->mnt_count));
 204         */
 205
 206         LASSERT(current->fs->pwd == new_ctx->pwd);
 207         LASSERT(current->fs->pwdmnt == new_ctx->pwdmnt);
 208
 209         set_fs(saved->fs);
 210         set_fs_pwd(current->fs, saved->pwdmnt, saved->pwd);
 211
 212         dput(saved->pwd);
 213         mntput(saved->pwdmnt);
 214         current->fs->umask = saved->luc.luc_umask;
 215         if (uc) {
 216                 current->uid = saved->luc.luc_uid;
 217                 current->gid = saved->luc.luc_gid;
 218                 current->fsuid = saved->luc.luc_fsuid;
 219                 current->fsgid = saved->luc.luc_fsgid;
 220                 current->cap_effective = saved->luc.luc_cap;
 221                 current->user->nid = saved->luc.luc_nid;
 222                 pop_group_info(saved, uc->luc_ginfo);
 223         }
 224
 225         /*
 226         CDEBUG(D_INFO,
 227                "= pop  %p->%p = cur fs %p pwd %p:d%d:i%d (%.*s), pwdmnt %p:%d\n",
 228                saved, current, current->fs, current->fs->pwd,
 229                atomic_read(&current->fs->pwd->d_count),
 230                atomic_read(&current->fs->pwd->d_inode->i_count),
 231                current->fs->pwd->d_name.len, current->fs->pwd->d_name.name,
 232                current->fs->pwdmnt,
 233                atomic_read(&current->fs->pwdmnt->mnt_count));
 234         */
 235 }
 236 EXPORT_SYMBOL(pop_ctxt);
 237
 238 /* utility to make a file */
 239 struct dentry *simple_mknod(struct dentry *dir, char *name, int mode, int fix)
 240 {
 241         struct dentry *dchild;
 242         int err = 0;
 243         ENTRY;
 244
 245         ASSERT_KERNEL_CTXT("kernel doing mknod outside kernel context\n");
 246         CDEBUG(D_INODE, "creating file %.*s\n", (int)strlen(name), name);
 247
 248         dchild = ll_lookup_one_len(name, dir, strlen(name));
 249         if (IS_ERR(dchild))
 250                 GOTO(out_up, dchild);
 251
 252         if (dchild->d_inode) {
 253                 int old_mode = dchild->d_inode->i_mode;
 254                 if (!S_ISREG(old_mode))
 255                         GOTO(out_err, err = -EEXIST);
 256
 257                 /* Fixup file permissions if necessary */
 258                 if (fix && (old_mode & S_IALLUGO) != (mode & S_IALLUGO)) {
 259                         CWARN("fixing permissions on %s from %o to %o\n",
 260                               name, old_mode, mode);
 261                         dchild->d_inode->i_mode = (mode & S_IALLUGO) |
 262                                                   (old_mode & ~S_IALLUGO);
 263                         mark_inode_dirty(dchild->d_inode);
 264                 }
 265                 GOTO(out_up, dchild);
 266         }
 267
 268         err = ll_vfs_create(dir->d_inode, dchild, (mode & ~S_IFMT) | S_IFREG,
 269                             NULL);
 270         if (err)
 271                 GOTO(out_err, err);
 272
 273         RETURN(dchild);
 274
 275 out_err:
 276         dput(dchild);
 277         dchild = ERR_PTR(err);
 278 out_up:
 279         return dchild;
 280 }
 281 EXPORT_SYMBOL(simple_mknod);
 282
 283 /* utility to make a directory */
 284 struct dentry *simple_mkdir(struct dentry *dir, char *name, int mode, int fix)
 285 {
 286         struct dentry *dchild;
 287         int err = 0;
 288         ENTRY;
 289
 290         ASSERT_KERNEL_CTXT("kernel doing mkdir outside kernel context\n");
 291         CDEBUG(D_INODE, "creating directory %.*s\n", (int)strlen(name), name);
 292         dchild = ll_lookup_one_len(name, dir, strlen(name));
 293         if (IS_ERR(dchild))
 294                 GOTO(out_up, dchild);
 295
 296         if (dchild->d_inode) {
 297                 int old_mode = dchild->d_inode->i_mode;
 298                 if (!S_ISDIR(old_mode)) {
 299                         CERROR("found %s (%lu/%u) is mode %o\n", name,
 300                                dchild->d_inode->i_ino,
 301                                dchild->d_inode->i_generation, old_mode);
 302                         GOTO(out_err, err = -ENOTDIR);
 303                 }
 304
 305                 /* Fixup directory permissions if necessary */
 306                 if (fix && (old_mode & S_IALLUGO) != (mode & S_IALLUGO)) {
 307                         CWARN("fixing permissions on %s from %o to %o\n",
 308                               name, old_mode, mode);
 309                         dchild->d_inode->i_mode = (mode & S_IALLUGO) |
 310                                                   (old_mode & ~S_IALLUGO);
 311                         mark_inode_dirty(dchild->d_inode);
 312                 }
 313                 GOTO(out_up, dchild);
 314         }
 315
 316         err = vfs_mkdir(dir->d_inode, dchild, mode);
 317         if (err)
 318                 GOTO(out_err, err);
 319
 320         RETURN(dchild);
 321
 322 out_err:
 323         dput(dchild);
 324         dchild = ERR_PTR(err);
 325 out_up:
 326         return dchild;
 327 }
 328 EXPORT_SYMBOL(simple_mkdir);
 329
 330 /*
 331  * Read a file from within kernel context.  Prior to calling this
 332  * function we should already have done a push_ctxt().
 333  */
 334 int lustre_fread(struct file *file, void *buf, int len, loff_t *off)
 335 {
 336         ASSERT_KERNEL_CTXT("kernel doing read outside kernel context\n");
 337         if (!file || !file->f_op || !file->f_op->read || !off)
 338                 RETURN(-ENOSYS);
 339
 340         return file->f_op->read(file, buf, len, off);
 341 }
 342 EXPORT_SYMBOL(lustre_fread);
 343
 344 /*
 345  * Write a file from within kernel context.  Prior to calling this
 346  * function we should already have done a push_ctxt().
 347  */
 348 int lustre_fwrite(struct file *file, const void *buf, int len, loff_t *off)
 349 {
 350         ENTRY;
 351         ASSERT_KERNEL_CTXT("kernel doing write outside kernel context\n");
 352         if (!file)
 353                 RETURN(-ENOENT);
 354         if (!file->f_op)
 355                 RETURN(-ENOSYS);
 356         if (!off)
 357                 RETURN(-EINVAL);
 358
 359         if (!file->f_op->write)
 360                 RETURN(-EROFS);
 361
 362         RETURN(file->f_op->write(file, buf, len, off));
 363 }
 364 EXPORT_SYMBOL(lustre_fwrite);
 365
 366 /*
 367  * Sync a file from within kernel context.  Prior to calling this
 368  * function we should already have done a push_ctxt().
 369  */
 370 int lustre_fsync(struct file *file)
 371 {
 372         ENTRY;
 373         ASSERT_KERNEL_CTXT("kernel doing sync outside kernel context\n");
 374         if (!file || !file->f_op || !file->f_op->fsync)
 375                 RETURN(-ENOSYS);
 376
 377         RETURN(file->f_op->fsync(file, file->f_dentry, 0));
 378 }
 379 EXPORT_SYMBOL(lustre_fsync);
 380
 381 struct l_file *l_dentry_open(struct lvfs_run_ctxt *ctxt, struct l_dentry *de,
 382                              int flags)
 383 {
 384         mntget(ctxt->pwdmnt);
 385         return dentry_open(de, ctxt->pwdmnt, flags);
 386 }
 387 EXPORT_SYMBOL(l_dentry_open);
 388
 389 static int l_filldir(void *__buf, const char *name, int namlen, loff_t offset,
 390                      ino_t ino, unsigned int d_type)
 391 {
 392         struct l_linux_dirent *dirent;
 393         struct l_readdir_callback *buf = (struct l_readdir_callback *)__buf;
 394
 395         dirent = buf->lrc_dirent;
 396         if (dirent)
 397                dirent->lld_off = offset;
 398
 399         OBD_ALLOC(dirent, sizeof(*dirent));
 400         if (!dirent)
 401                 return -ENOMEM;
 402
 403         list_add_tail(&dirent->lld_list, buf->lrc_list);
 404
 405         buf->lrc_dirent = dirent;
 406         dirent->lld_ino = ino;
 407         LASSERT(sizeof(dirent->lld_name) >= namlen + 1);
 408         memcpy(dirent->lld_name, name, namlen);
 409
 410         return 0;
 411 }
 412
 413 long l_readdir(struct file *file, struct list_head *dentry_list)
 414 {
 415         struct l_linux_dirent *lastdirent;
 416         struct l_readdir_callback buf;
 417         int error;
 418
 419         buf.lrc_dirent = NULL;
 420         buf.lrc_list = dentry_list;
 421
 422         error = vfs_readdir(file, l_filldir, &buf);
 423         if (error < 0)
 424                 return error;
 425
 426         lastdirent = buf.lrc_dirent;
 427         if (lastdirent)
 428                 lastdirent->lld_off = file->f_pos;
 429
 430         return 0;
 431 }
 432 EXPORT_SYMBOL(l_readdir);
 433 EXPORT_SYMBOL(obd_memory);
 434 EXPORT_SYMBOL(obd_memmax);
 435
 436 #if defined (CONFIG_DEBUG_MEMORY) && defined(__KERNEL__)
 437 static spinlock_t obd_memlist_lock = SPIN_LOCK_UNLOCKED;
 438 static struct hlist_head *obd_memtable;
 439 static unsigned long obd_memtable_size;
 440
 441 static int lvfs_memdbg_init(int size)
 442 {
 443         struct hlist_head *head;
 444         int i;
 445
 446         LASSERT(size > sizeof(sizeof(struct hlist_head)));
 447         obd_memtable_size = size / sizeof(struct hlist_head);
 448
 449         CWARN("allocating %lu malloc entries\n",
 450               (unsigned long)obd_memtable_size);
 451
 452         obd_memtable = kmalloc(size, GFP_KERNEL);
 453         if (!obd_memtable)
 454                 return -ENOMEM;
 455
 456         i = obd_memtable_size;
 457         head = obd_memtable;
 458         do {
 459                 INIT_HLIST_HEAD(head);
 460                 head++;
 461                 i--;
 462         } while(i);
 463
 464         return 0;
 465 }
 466
 467 static int lvfs_memdbg_cleanup(void)
 468 {
 469         struct hlist_node *node = NULL, *tmp = NULL;
 470         struct hlist_head *head;
 471         struct mem_track *mt;
 472         int i;
 473
 474         spin_lock(&obd_memlist_lock);
 475         for (i = 0, head = obd_memtable; i < obd_memtable_size; i++, head++) {
 476                 hlist_for_each_safe(node, tmp, head) {
 477                         mt = hlist_entry(node, struct mem_track, m_hash);
 478                         hlist_del_init(&mt->m_hash);
 479                         kfree(mt);
 480                 }
 481         }
 482         spin_unlock(&obd_memlist_lock);
 483         kfree(obd_memtable);
 484         return 0;
 485 }
 486
 487 static inline unsigned long const hashfn(void *ptr)
 488 {
 489         return (unsigned long)ptr &
 490                 (obd_memtable_size - 1);
 491 }
 492
 493 static void __lvfs_memdbg_insert(struct mem_track *mt)
 494 {
 495         struct hlist_head *head = obd_memtable +
 496                 hashfn(mt->m_ptr);
 497         hlist_add_head(&mt->m_hash, head);
 498 }
 499
 500 void lvfs_memdbg_insert(struct mem_track *mt)
 501 {
 502         spin_lock(&obd_memlist_lock);
 503         __lvfs_memdbg_insert(mt);
 504         spin_unlock(&obd_memlist_lock);
 505 }
 506 EXPORT_SYMBOL(lvfs_memdbg_insert);
 507
 508 static void __lvfs_memdbg_remove(struct mem_track *mt)
 509 {
 510         hlist_del_init(&mt->m_hash);
 511 }
 512
 513 void lvfs_memdbg_remove(struct mem_track *mt)
 514 {
 515         spin_lock(&obd_memlist_lock);
 516         __lvfs_memdbg_remove(mt);
 517         spin_unlock(&obd_memlist_lock);
 518 }
 519 EXPORT_SYMBOL(lvfs_memdbg_remove);
 520
 521 static struct mem_track *__lvfs_memdbg_find(void *ptr)
 522 {
 523         struct hlist_node *node = NULL;
 524         struct mem_track *mt = NULL;
 525         struct hlist_head *head;
 526
 527         head = obd_memtable + hashfn(ptr);
 528
 529         hlist_for_each(node, head) {
 530                 mt = hlist_entry(node, struct mem_track, m_hash);
 531                 if ((unsigned long)mt->m_ptr == (unsigned long)ptr)
 532                         break;
 533                 mt = NULL;
 534         }
 535         return mt;
 536 }
 537
 538 struct mem_track *lvfs_memdbg_find(void *ptr)
 539 {
 540         struct mem_track *mt;
 541
 542         spin_lock(&obd_memlist_lock);
 543         mt = __lvfs_memdbg_find(ptr);
 544         spin_unlock(&obd_memlist_lock);
 545
 546         return mt;
 547 }
 548 EXPORT_SYMBOL(lvfs_memdbg_find);
 549
 550 int lvfs_memdbg_check_insert(struct mem_track *mt)
 551 {
 552         spin_lock(&obd_memlist_lock);
 553         if (!__lvfs_memdbg_find(mt->m_ptr)) {
 554                 __lvfs_memdbg_insert(mt);
 555                 spin_unlock(&obd_memlist_lock);
 556                 return 1;
 557         }
 558         spin_unlock(&obd_memlist_lock);
 559         return 0;
 560 }
 561 EXPORT_SYMBOL(lvfs_memdbg_check_insert);
 562
 563 struct mem_track *
 564 lvfs_memdbg_check_remove(void *ptr)
 565 {
 566         struct mem_track *mt;
 567
 568         spin_lock(&obd_memlist_lock);
 569         mt = __lvfs_memdbg_find(ptr);
 570         if (mt) {
 571                 __lvfs_memdbg_remove(mt);
 572                 spin_unlock(&obd_memlist_lock);
 573                 return mt;
 574         }
 575         spin_unlock(&obd_memlist_lock);
 576         return NULL;
 577 }
 578 EXPORT_SYMBOL(lvfs_memdbg_check_remove);
 579 #endif
 580
 581 void lvfs_memdbg_show(void)
 582 {
 583 #if defined (CONFIG_DEBUG_MEMORY) && defined(__KERNEL__)
 584         struct hlist_node *node = NULL;
 585         struct hlist_head *head;
 586         struct mem_track *mt;
 587 #endif
 588         int leaked;
 589
 590 #if defined (CONFIG_DEBUG_MEMORY) && defined(__KERNEL__)
 591         int i;
 592 #endif
 593
 594         leaked = atomic_read(&obd_memory);
 595
 596         if (leaked > 0) {
 597                 CWARN("memory leaks detected (max %d, leaked %d)\n",
 598                       obd_memmax, leaked);
 599
 600 #if defined (CONFIG_DEBUG_MEMORY) && defined(__KERNEL__)
 601                 spin_lock(&obd_memlist_lock);
 602                 for (i = 0, head = obd_memtable; i < obd_memtable_size; i++, head++) {
 603                         hlist_for_each(node, head) {
 604                                 mt = hlist_entry(node, struct mem_track, m_hash);
 605                                 CWARN("  [%s] ptr: 0x%p, size: %d, src at \"%s\"\n",
 606                                       ((mt->m_flags & MT_FLAGS_WRONG_SIZE) ?
 607                                        "wrong ck size" : "leaked memory"),
 608                                       mt->m_ptr, mt->m_size, mt->m_loc);
 609                         }
 610                 }
 611                 spin_unlock(&obd_memlist_lock);
 612 #endif
 613                 /* remove for production */
 614                 portals_debug_dumplog();
 615         }
 616 }
 617 EXPORT_SYMBOL(lvfs_memdbg_show);
 618
 619 static int __init lvfs_linux_init(void)
 620 {
 621         ENTRY;
 622 #if defined (CONFIG_DEBUG_MEMORY) && defined(__KERNEL__)
 623         lvfs_memdbg_init(PAGE_SIZE);
 624 #endif
 625         lvfs_mount_list_init();
 626         RETURN(0);
 627 }
 628
 629 static void __exit lvfs_linux_exit(void)
 630 {
 631         ENTRY;
 632
 633         lvfs_mount_list_cleanup();
 634         lvfs_memdbg_show();
 635
 636 #if defined (CONFIG_DEBUG_MEMORY) && defined(__KERNEL__)
 637         lvfs_memdbg_cleanup();
 638 #endif
 639         EXIT;
 640         return;
 641 }
 642
 643 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 644 MODULE_DESCRIPTION("Lustre VFS Filesystem Helper v0.1");
 645 MODULE_LICENSE("GPL");
 646
 647 module_init(lvfs_linux_init);
 648 module_exit(lvfs_linux_exit);