fs/jfs/super.c

   1 /*
   2  *   Copyright (C) International Business Machines Corp., 2000-2004
   3  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
   4  *
   5  *   This program is free software;  you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation; either version 2 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *   the GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program;  if not, write to the Free Software
  17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/fs.h>
  21 #include <linux/config.h>
  22 #include <linux/module.h>
  23 #include <linux/parser.h>
  24 #include <linux/completion.h>
  25 #include <linux/vfs.h>
  26 #include <asm/uaccess.h>
  27
  28 #include "jfs_incore.h"
  29 #include "jfs_filsys.h"
  30 #include "jfs_metapage.h"
  31 #include "jfs_superblock.h"
  32 #include "jfs_dmap.h"
  33 #include "jfs_imap.h"
  34 #include "jfs_acl.h"
  35 #include "jfs_debug.h"
  36
  37 MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
  38 MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
  39 MODULE_LICENSE("GPL");
  40
  41 static kmem_cache_t * jfs_inode_cachep;
  42
  43 static struct super_operations jfs_super_operations;
  44 static struct export_operations jfs_export_operations;
  45 static struct file_system_type jfs_fs_type;
  46
  47 int jfs_stop_threads;
  48 static pid_t jfsIOthread;
  49 static pid_t jfsCommitThread;
  50 static pid_t jfsSyncThread;
  51 DECLARE_COMPLETION(jfsIOwait);
  52
  53 #ifdef CONFIG_JFS_DEBUG
  54 int jfsloglevel = JFS_LOGLEVEL_WARN;
  55 MODULE_PARM(jfsloglevel, "i");
  56 MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
  57 #endif
  58
  59 /*
  60  * External declarations
  61  */
  62 extern int jfs_mount(struct super_block *);
  63 extern int jfs_mount_rw(struct super_block *, int);
  64 extern int jfs_umount(struct super_block *);
  65 extern int jfs_umount_rw(struct super_block *);
  66
  67 extern int jfsIOWait(void *);
  68 extern int jfs_lazycommit(void *);
  69 extern int jfs_sync(void *);
  70
  71 extern void jfs_read_inode(struct inode *inode);
  72 extern void jfs_dirty_inode(struct inode *inode);
  73 extern void jfs_delete_inode(struct inode *inode);
  74 extern void jfs_write_inode(struct inode *inode, int wait);
  75
  76 extern struct dentry *jfs_get_parent(struct dentry *dentry);
  77 extern int jfs_extendfs(struct super_block *, s64, int);
  78
  79 #ifdef PROC_FS_JFS              /* see jfs_debug.h */
  80 extern void jfs_proc_init(void);
  81 extern void jfs_proc_clean(void);
  82 #endif
  83
  84 extern wait_queue_head_t jfs_IO_thread_wait;
  85 extern wait_queue_head_t jfs_commit_thread_wait;
  86 extern wait_queue_head_t jfs_sync_thread_wait;
  87
  88 static void jfs_handle_error(struct super_block *sb)
  89 {
  90         struct jfs_sb_info *sbi = JFS_SBI(sb);
  91
  92         if (sb->s_flags & MS_RDONLY)
  93                 return;
  94
  95         updateSuper(sb, FM_DIRTY);
  96
  97         if (sbi->flag & JFS_ERR_PANIC)
  98                 panic("JFS (device %s): panic forced after error\n",
  99                         sb->s_id);
 100         else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
 101                 jfs_err("ERROR: (device %s): remounting filesystem "
 102                         "as read-only\n",
 103                         sb->s_id);
 104                 sb->s_flags |= MS_RDONLY;
 105         }
 106
 107         /* nothing is done for continue beyond marking the superblock dirty */
 108 }
 109
 110 void jfs_error(struct super_block *sb, const char * function, ...)
 111 {
 112         static char error_buf[256];
 113         va_list args;
 114
 115         va_start(args, function);
 116         vsprintf(error_buf, function, args);
 117         va_end(args);
 118
 119         printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf);
 120
 121         jfs_handle_error(sb);
 122 }
 123
 124 static struct inode *jfs_alloc_inode(struct super_block *sb)
 125 {
 126         struct jfs_inode_info *jfs_inode;
 127
 128         jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
 129         if (!jfs_inode)
 130                 return NULL;
 131         return &jfs_inode->vfs_inode;
 132 }
 133
 134 static void jfs_destroy_inode(struct inode *inode)
 135 {
 136         struct jfs_inode_info *ji = JFS_IP(inode);
 137
 138         if (ji->active_ag != -1) {
 139                 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
 140                 atomic_dec(&bmap->db_active[ji->active_ag]);
 141         }
 142
 143 #ifdef CONFIG_JFS_POSIX_ACL
 144         if (ji->i_acl != JFS_ACL_NOT_CACHED) {
 145                 posix_acl_release(ji->i_acl);
 146                 ji->i_acl = JFS_ACL_NOT_CACHED;
 147         }
 148         if (ji->i_default_acl != JFS_ACL_NOT_CACHED) {
 149                 posix_acl_release(ji->i_default_acl);
 150                 ji->i_default_acl = JFS_ACL_NOT_CACHED;
 151         }
 152 #endif
 153
 154         kmem_cache_free(jfs_inode_cachep, ji);
 155 }
 156
 157 static int jfs_statfs(struct super_block *sb, struct kstatfs *buf)
 158 {
 159         struct jfs_sb_info *sbi = JFS_SBI(sb);
 160         s64 maxinodes;
 161         struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
 162
 163         jfs_info("In jfs_statfs");
 164         buf->f_type = JFS_SUPER_MAGIC;
 165         buf->f_bsize = sbi->bsize;
 166         buf->f_blocks = sbi->bmap->db_mapsize;
 167         buf->f_bfree = sbi->bmap->db_nfree;
 168         buf->f_bavail = sbi->bmap->db_nfree;
 169         /*
 170          * If we really return the number of allocated & free inodes, some
 171          * applications will fail because they won't see enough free inodes.
 172          * We'll try to calculate some guess as to how may inodes we can
 173          * really allocate
 174          *
 175          * buf->f_files = atomic_read(&imap->im_numinos);
 176          * buf->f_ffree = atomic_read(&imap->im_numfree);
 177          */
 178         maxinodes = min((s64) atomic_read(&imap->im_numinos) +
 179                         ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
 180                          << L2INOSPEREXT), (s64) 0xffffffffLL);
 181         buf->f_files = maxinodes;
 182         buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
 183                                     atomic_read(&imap->im_numfree));
 184
 185         buf->f_namelen = JFS_NAME_MAX;
 186         return 0;
 187 }
 188
 189 static void jfs_put_super(struct super_block *sb)
 190 {
 191         struct jfs_sb_info *sbi = JFS_SBI(sb);
 192         int rc;
 193
 194         jfs_info("In jfs_put_super");
 195         rc = jfs_umount(sb);
 196         if (rc)
 197                 jfs_err("jfs_umount failed with return code %d", rc);
 198         if (sbi->nls_tab)
 199                 unload_nls(sbi->nls_tab);
 200         sbi->nls_tab = NULL;
 201
 202         kfree(sbi);
 203 }
 204
 205 enum {
 206         Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
 207         Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err,
 208 };
 209
 210 static match_table_t tokens = {
 211         {Opt_integrity, "integrity"},
 212         {Opt_nointegrity, "nointegrity"},
 213         {Opt_iocharset, "iocharset=%s"},
 214         {Opt_resize, "resize=%u"},
 215         {Opt_resize_nosize, "resize"},
 216         {Opt_errors, "errors=%s"},
 217         {Opt_ignore, "noquota"},
 218         {Opt_ignore, "quota"},
 219         {Opt_ignore, "usrquota"},
 220         {Opt_ignore, "grpquota"},
 221         {Opt_err, NULL}
 222 };
 223
 224 static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
 225                          int *flag)
 226 {
 227         void *nls_map = NULL;
 228         char *p;
 229         struct jfs_sb_info *sbi = JFS_SBI(sb);
 230
 231         *newLVSize = 0;
 232
 233         if (!options)
 234                 return 1;
 235
 236         while ((p = strsep(&options, ",")) != NULL) {
 237                 substring_t args[MAX_OPT_ARGS];
 238                 int token;
 239                 if (!*p)
 240                         continue;
 241
 242                 token = match_token(p, tokens, args);
 243                 switch (token) {
 244                 case Opt_integrity:
 245                         *flag &= ~JFS_NOINTEGRITY;
 246                         break;
 247                 case Opt_nointegrity:
 248                         *flag |= JFS_NOINTEGRITY;
 249                         break;
 250                 case Opt_ignore:
 251                         /* Silently ignore the quota options */
 252                         /* Don't do anything ;-) */
 253                         break;
 254                 case Opt_iocharset:
 255                         if (nls_map)    /* specified iocharset twice! */
 256                                 unload_nls(nls_map);
 257                         nls_map = load_nls(args[0].from);
 258                         if (!nls_map) {
 259                                 printk(KERN_ERR "JFS: charset not found\n");
 260                                 goto cleanup;
 261                         }
 262                         break;
 263                 case Opt_resize:
 264                 {
 265                         char *resize = args[0].from;
 266                         *newLVSize = simple_strtoull(resize, &resize, 0);
 267                         break;
 268                 }
 269                 case Opt_resize_nosize:
 270                 {
 271                         *newLVSize = sb->s_bdev->bd_inode->i_size >>
 272                                 sb->s_blocksize_bits;
 273                         if (*newLVSize == 0)
 274                                 printk(KERN_ERR
 275                                        "JFS: Cannot determine volume size\n");
 276                         break;
 277                 }
 278                 case Opt_errors:
 279                 {
 280                         char *errors = args[0].from;
 281                         if (!errors || !*errors)
 282                                 goto cleanup;
 283                         if (!strcmp(errors, "continue")) {
 284                                 *flag &= ~JFS_ERR_REMOUNT_RO;
 285                                 *flag &= ~JFS_ERR_PANIC;
 286                                 *flag |= JFS_ERR_CONTINUE;
 287                         } else if (!strcmp(errors, "remount-ro")) {
 288                                 *flag &= ~JFS_ERR_CONTINUE;
 289                                 *flag &= ~JFS_ERR_PANIC;
 290                                 *flag |= JFS_ERR_REMOUNT_RO;
 291                         } else if (!strcmp(errors, "panic")) {
 292                                 *flag &= ~JFS_ERR_CONTINUE;
 293                                 *flag &= ~JFS_ERR_REMOUNT_RO;
 294                                 *flag |= JFS_ERR_PANIC;
 295                         } else {
 296                                 printk(KERN_ERR
 297                                        "JFS: %s is an invalid error handler\n",
 298                                        errors);
 299                                 goto cleanup;
 300                         }
 301                         break;
 302                 }
 303                 default:
 304                         printk("jfs: Unrecognized mount option \"%s\" "
 305                                         " or missing value\n", p);
 306                         goto cleanup;
 307                 }
 308         }
 309
 310         if (nls_map) {
 311                 /* Discard old (if remount) */
 312                 if (sbi->nls_tab)
 313                         unload_nls(sbi->nls_tab);
 314                 sbi->nls_tab = nls_map;
 315         }
 316         return 1;
 317
 318 cleanup:
 319         if (nls_map)
 320                 unload_nls(nls_map);
 321         return 0;
 322 }
 323
 324 static int jfs_remount(struct super_block *sb, int *flags, char *data)
 325 {
 326         s64 newLVSize = 0;
 327         int rc = 0;
 328         int flag = JFS_SBI(sb)->flag;
 329
 330         if (!parse_options(data, sb, &newLVSize, &flag)) {
 331                 return -EINVAL;
 332         }
 333         if (newLVSize) {
 334                 if (sb->s_flags & MS_RDONLY) {
 335                         printk(KERN_ERR
 336                   "JFS: resize requires volume to be mounted read-write\n");
 337                         return -EROFS;
 338                 }
 339                 rc = jfs_extendfs(sb, newLVSize, 0);
 340                 if (rc)
 341                         return rc;
 342         }
 343
 344         if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
 345                 JFS_SBI(sb)->flag = flag;
 346                 return jfs_mount_rw(sb, 1);
 347         }
 348         if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
 349                 rc = jfs_umount_rw(sb);
 350                 JFS_SBI(sb)->flag = flag;
 351                 return rc;
 352         }
 353         if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
 354                 if (!(sb->s_flags & MS_RDONLY)) {
 355                         rc = jfs_umount_rw(sb);
 356                         if (rc)
 357                                 return rc;
 358                         JFS_SBI(sb)->flag = flag;
 359                         return jfs_mount_rw(sb, 1);
 360                 }
 361         JFS_SBI(sb)->flag = flag;
 362
 363         return 0;
 364 }
 365
 366 static int jfs_fill_super(struct super_block *sb, void *data, int silent)
 367 {
 368         struct jfs_sb_info *sbi;
 369         struct inode *inode;
 370         int rc;
 371         s64 newLVSize = 0;
 372         int flag;
 373
 374         jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
 375
 376         if (!new_valid_dev(sb->s_bdev->bd_dev))
 377                 return -EOVERFLOW;
 378
 379         sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
 380         if (!sbi)
 381                 return -ENOSPC;
 382         memset(sbi, 0, sizeof (struct jfs_sb_info));
 383         sb->s_fs_info = sbi;
 384         sbi->sb = sb;
 385
 386         /* initialize the mount flag and determine the default error handler */
 387         flag = JFS_ERR_REMOUNT_RO;
 388
 389         if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
 390                 kfree(sbi);
 391                 return -EINVAL;
 392         }
 393         sbi->flag = flag;
 394
 395         if (newLVSize) {
 396                 printk(KERN_ERR "resize option for remount only\n");
 397                 return -EINVAL;
 398         }
 399
 400         /*
 401          * Initialize blocksize to 4K.
 402          */
 403         sb_set_blocksize(sb, PSIZE);
 404
 405         /*
 406          * Set method vectors.
 407          */
 408         sb->s_op = &jfs_super_operations;
 409         sb->s_export_op = &jfs_export_operations;
 410
 411         rc = jfs_mount(sb);
 412         if (rc) {
 413                 if (!silent) {
 414                         jfs_err("jfs_mount failed w/return code = %d", rc);
 415                 }
 416                 goto out_kfree;
 417         }
 418         if (sb->s_flags & MS_RDONLY)
 419                 sbi->log = 0;
 420         else {
 421                 rc = jfs_mount_rw(sb, 0);
 422                 if (rc) {
 423                         if (!silent) {
 424                                 jfs_err("jfs_mount_rw failed, return code = %d",
 425                                         rc);
 426                         }
 427                         goto out_no_rw;
 428                 }
 429         }
 430
 431         sb->s_magic = JFS_SUPER_MAGIC;
 432
 433         inode = iget(sb, ROOT_I);
 434         if (!inode || is_bad_inode(inode))
 435                 goto out_no_root;
 436         sb->s_root = d_alloc_root(inode);
 437         if (!sb->s_root)
 438                 goto out_no_root;
 439
 440         /* logical blocks are represented by 40 bits in pxd_t, etc. */
 441         sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
 442 #if BITS_PER_LONG == 32
 443         /*
 444          * Page cache is indexed by long.
 445          * I would use MAX_LFS_FILESIZE, but it's only half as big
 446          */
 447         sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
 448 #endif
 449
 450         return 0;
 451
 452 out_no_root:
 453         jfs_err("jfs_read_super: get root inode failed");
 454         if (inode)
 455                 iput(inode);
 456
 457 out_no_rw:
 458         rc = jfs_umount(sb);
 459         if (rc) {
 460                 jfs_err("jfs_umount failed with return code %d", rc);
 461         }
 462 out_kfree:
 463         if (sbi->nls_tab)
 464                 unload_nls(sbi->nls_tab);
 465         kfree(sbi);
 466         return -EINVAL;
 467 }
 468
 469 static void jfs_write_super_lockfs(struct super_block *sb)
 470 {
 471         struct jfs_sb_info *sbi = JFS_SBI(sb);
 472         struct jfs_log *log = sbi->log;
 473
 474         if (!(sb->s_flags & MS_RDONLY)) {
 475                 txQuiesce(sb);
 476                 lmLogShutdown(log);
 477                 updateSuper(sb, FM_CLEAN);
 478         }
 479 }
 480
 481 static void jfs_unlockfs(struct super_block *sb)
 482 {
 483         struct jfs_sb_info *sbi = JFS_SBI(sb);
 484         struct jfs_log *log = sbi->log;
 485         int rc = 0;
 486
 487         if (!(sb->s_flags & MS_RDONLY)) {
 488                 updateSuper(sb, FM_MOUNT);
 489                 if ((rc = lmLogInit(log)))
 490                         jfs_err("jfs_unlock failed with return code %d", rc);
 491                 else
 492                         txResume(sb);
 493         }
 494 }
 495
 496 static struct super_block *jfs_get_sb(struct file_system_type *fs_type,
 497         int flags, const char *dev_name, void *data)
 498 {
 499         return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
 500 }
 501
 502 static int jfs_sync_fs(struct super_block *sb, int wait)
 503 {
 504         struct jfs_log *log = JFS_SBI(sb)->log;
 505
 506         /* log == NULL indicates read-only mount */
 507         if (log)
 508                 jfs_flush_journal(log, wait);
 509
 510         return 0;
 511 }
 512
 513 static struct super_operations jfs_super_operations = {
 514         .alloc_inode    = jfs_alloc_inode,
 515         .destroy_inode  = jfs_destroy_inode,
 516         .read_inode     = jfs_read_inode,
 517         .dirty_inode    = jfs_dirty_inode,
 518         .write_inode    = jfs_write_inode,
 519         .delete_inode   = jfs_delete_inode,
 520         .put_super      = jfs_put_super,
 521         .sync_fs        = jfs_sync_fs,
 522         .write_super_lockfs = jfs_write_super_lockfs,
 523         .unlockfs       = jfs_unlockfs,
 524         .statfs         = jfs_statfs,
 525         .remount_fs     = jfs_remount,
 526 };
 527
 528 static struct export_operations jfs_export_operations = {
 529         .get_parent     = jfs_get_parent,
 530 };
 531
 532 static struct file_system_type jfs_fs_type = {
 533         .owner          = THIS_MODULE,
 534         .name           = "jfs",
 535         .get_sb         = jfs_get_sb,
 536         .kill_sb        = kill_block_super,
 537         .fs_flags       = FS_REQUIRES_DEV,
 538 };
 539
 540 extern int metapage_init(void);
 541 extern int txInit(void);
 542 extern void txExit(void);
 543 extern void metapage_exit(void);
 544
 545 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
 546 {
 547         struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
 548
 549         if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
 550             SLAB_CTOR_CONSTRUCTOR) {
 551                 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
 552                 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
 553                 init_rwsem(&jfs_ip->rdwrlock);
 554                 init_MUTEX(&jfs_ip->commit_sem);
 555                 init_rwsem(&jfs_ip->xattr_sem);
 556                 jfs_ip->active_ag = -1;
 557 #ifdef CONFIG_JFS_POSIX_ACL
 558                 jfs_ip->i_acl = JFS_ACL_NOT_CACHED;
 559                 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED;
 560 #endif
 561                 inode_init_once(&jfs_ip->vfs_inode);
 562         }
 563 }
 564
 565 static int __init init_jfs_fs(void)
 566 {
 567         int rc;
 568
 569         jfs_inode_cachep =
 570             kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
 571                             SLAB_RECLAIM_ACCOUNT, init_once, NULL);
 572         if (jfs_inode_cachep == NULL)
 573                 return -ENOMEM;
 574
 575         /*
 576          * Metapage initialization
 577          */
 578         rc = metapage_init();
 579         if (rc) {
 580                 jfs_err("metapage_init failed w/rc = %d", rc);
 581                 goto free_slab;
 582         }
 583
 584         /*
 585          * Transaction Manager initialization
 586          */
 587         rc = txInit();
 588         if (rc) {
 589                 jfs_err("txInit failed w/rc = %d", rc);
 590                 goto free_metapage;
 591         }
 592
 593         /*
 594          * I/O completion thread (endio)
 595          */
 596         jfsIOthread = kernel_thread(jfsIOWait, 0, CLONE_KERNEL);
 597         if (jfsIOthread < 0) {
 598                 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread);
 599                 goto end_txmngr;
 600         }
 601         wait_for_completion(&jfsIOwait);        /* Wait until thread starts */
 602
 603         jfsCommitThread = kernel_thread(jfs_lazycommit, 0, CLONE_KERNEL);
 604         if (jfsCommitThread < 0) {
 605                 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsCommitThread);
 606                 goto kill_iotask;
 607         }
 608         wait_for_completion(&jfsIOwait);        /* Wait until thread starts */
 609
 610         jfsSyncThread = kernel_thread(jfs_sync, 0, CLONE_KERNEL);
 611         if (jfsSyncThread < 0) {
 612                 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread);
 613                 goto kill_committask;
 614         }
 615         wait_for_completion(&jfsIOwait);        /* Wait until thread starts */
 616
 617 #ifdef PROC_FS_JFS
 618         jfs_proc_init();
 619 #endif
 620
 621         return register_filesystem(&jfs_fs_type);
 622
 623 kill_committask:
 624         jfs_stop_threads = 1;
 625         wake_up(&jfs_commit_thread_wait);
 626         wait_for_completion(&jfsIOwait);        /* Wait for thread exit */
 627 kill_iotask:
 628         jfs_stop_threads = 1;
 629         wake_up(&jfs_IO_thread_wait);
 630         wait_for_completion(&jfsIOwait);        /* Wait for thread exit */
 631 end_txmngr:
 632         txExit();
 633 free_metapage:
 634         metapage_exit();
 635 free_slab:
 636         kmem_cache_destroy(jfs_inode_cachep);
 637         return rc;
 638 }
 639
 640 static void __exit exit_jfs_fs(void)
 641 {
 642         jfs_info("exit_jfs_fs called");
 643
 644         jfs_stop_threads = 1;
 645         txExit();
 646         metapage_exit();
 647         wake_up(&jfs_IO_thread_wait);
 648         wait_for_completion(&jfsIOwait);        /* Wait until IO thread exits */
 649         wake_up(&jfs_commit_thread_wait);
 650         wait_for_completion(&jfsIOwait);        /* Wait until Commit thread exits */
 651         wake_up(&jfs_sync_thread_wait);
 652         wait_for_completion(&jfsIOwait);        /* Wait until Sync thread exits */
 653 #ifdef PROC_FS_JFS
 654         jfs_proc_clean();
 655 #endif
 656         unregister_filesystem(&jfs_fs_type);
 657         kmem_cache_destroy(jfs_inode_cachep);
 658 }
 659
 660 module_init(init_jfs_fs)
 661 module_exit(exit_jfs_fs)