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 <linux/moduleparam.h>
  27 #include <linux/posix_acl.h>
  28 #include <asm/uaccess.h>
  29
  30 #include "jfs_incore.h"
  31 #include "jfs_filsys.h"
  32 #include "jfs_inode.h"
  33 #include "jfs_metapage.h"
  34 #include "jfs_superblock.h"
  35 #include "jfs_dmap.h"
  36 #include "jfs_imap.h"
  37 #include "jfs_acl.h"
  38 #include "jfs_debug.h"
  39
  40 MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
  41 MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
  42 MODULE_LICENSE("GPL");
  43
  44 static kmem_cache_t * jfs_inode_cachep;
  45
  46 static struct super_operations jfs_super_operations;
  47 static struct export_operations jfs_export_operations;
  48 static struct file_system_type jfs_fs_type;
  49
  50 #define MAX_COMMIT_THREADS 64
  51 static int commit_threads = 0;
  52 module_param(commit_threads, int, 0);
  53 MODULE_PARM_DESC(commit_threads, "Number of commit threads");
  54
  55 int jfs_stop_threads;
  56 static pid_t jfsIOthread;
  57 static pid_t jfsCommitThread[MAX_COMMIT_THREADS];
  58 static pid_t jfsSyncThread;
  59 DECLARE_COMPLETION(jfsIOwait);
  60
  61 #ifdef CONFIG_JFS_DEBUG
  62 int jfsloglevel = JFS_LOGLEVEL_WARN;
  63 module_param(jfsloglevel, int, 0644);
  64 MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
  65 #endif
  66
  67 static void jfs_handle_error(struct super_block *sb)
  68 {
  69         struct jfs_sb_info *sbi = JFS_SBI(sb);
  70
  71         if (sb->s_flags & MS_RDONLY)
  72                 return;
  73
  74         updateSuper(sb, FM_DIRTY);
  75
  76         if (sbi->flag & JFS_ERR_PANIC)
  77                 panic("JFS (device %s): panic forced after error\n",
  78                         sb->s_id);
  79         else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
  80                 jfs_err("ERROR: (device %s): remounting filesystem "
  81                         "as read-only\n",
  82                         sb->s_id);
  83                 sb->s_flags |= MS_RDONLY;
  84         }
  85
  86         /* nothing is done for continue beyond marking the superblock dirty */
  87 }
  88
  89 void jfs_error(struct super_block *sb, const char * function, ...)
  90 {
  91         static char error_buf[256];
  92         va_list args;
  93
  94         va_start(args, function);
  95         vsprintf(error_buf, function, args);
  96         va_end(args);
  97
  98         printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf);
  99
 100         jfs_handle_error(sb);
 101 }
 102
 103 static struct inode *jfs_alloc_inode(struct super_block *sb)
 104 {
 105         struct jfs_inode_info *jfs_inode;
 106
 107         jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
 108         if (!jfs_inode)
 109                 return NULL;
 110         return &jfs_inode->vfs_inode;
 111 }
 112
 113 static void jfs_destroy_inode(struct inode *inode)
 114 {
 115         struct jfs_inode_info *ji = JFS_IP(inode);
 116
 117         spin_lock_irq(&ji->ag_lock);
 118         if (ji->active_ag != -1) {
 119                 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
 120                 atomic_dec(&bmap->db_active[ji->active_ag]);
 121                 ji->active_ag = -1;
 122         }
 123         spin_unlock_irq(&ji->ag_lock);
 124
 125 #ifdef CONFIG_JFS_POSIX_ACL
 126         if (ji->i_acl != JFS_ACL_NOT_CACHED) {
 127                 posix_acl_release(ji->i_acl);
 128                 ji->i_acl = JFS_ACL_NOT_CACHED;
 129         }
 130         if (ji->i_default_acl != JFS_ACL_NOT_CACHED) {
 131                 posix_acl_release(ji->i_default_acl);
 132                 ji->i_default_acl = JFS_ACL_NOT_CACHED;
 133         }
 134 #endif
 135
 136         kmem_cache_free(jfs_inode_cachep, ji);
 137 }
 138
 139 static int jfs_statfs(struct super_block *sb, struct kstatfs *buf)
 140 {
 141         struct jfs_sb_info *sbi = JFS_SBI(sb);
 142         s64 maxinodes;
 143         struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
 144
 145         jfs_info("In jfs_statfs");
 146         buf->f_type = JFS_SUPER_MAGIC;
 147         buf->f_bsize = sbi->bsize;
 148         buf->f_blocks = sbi->bmap->db_mapsize;
 149         buf->f_bfree = sbi->bmap->db_nfree;
 150         buf->f_bavail = sbi->bmap->db_nfree;
 151         /*
 152          * If we really return the number of allocated & free inodes, some
 153          * applications will fail because they won't see enough free inodes.
 154          * We'll try to calculate some guess as to how may inodes we can
 155          * really allocate
 156          *
 157          * buf->f_files = atomic_read(&imap->im_numinos);
 158          * buf->f_ffree = atomic_read(&imap->im_numfree);
 159          */
 160         maxinodes = min((s64) atomic_read(&imap->im_numinos) +
 161                         ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
 162                          << L2INOSPEREXT), (s64) 0xffffffffLL);
 163         buf->f_files = maxinodes;
 164         buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
 165                                     atomic_read(&imap->im_numfree));
 166
 167         buf->f_namelen = JFS_NAME_MAX;
 168         return 0;
 169 }
 170
 171 static void jfs_put_super(struct super_block *sb)
 172 {
 173         struct jfs_sb_info *sbi = JFS_SBI(sb);
 174         int rc;
 175
 176         jfs_info("In jfs_put_super");
 177         rc = jfs_umount(sb);
 178         if (rc)
 179                 jfs_err("jfs_umount failed with return code %d", rc);
 180         if (sbi->nls_tab)
 181                 unload_nls(sbi->nls_tab);
 182         sbi->nls_tab = NULL;
 183
 184         truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
 185         iput(sbi->direct_inode);
 186         sbi->direct_inode = NULL;
 187
 188         kfree(sbi);
 189 }
 190
 191 enum {
 192         Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
 193         Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err,
 194 };
 195
 196 static match_table_t tokens = {
 197         {Opt_integrity, "integrity"},
 198         {Opt_nointegrity, "nointegrity"},
 199         {Opt_iocharset, "iocharset=%s"},
 200         {Opt_resize, "resize=%u"},
 201         {Opt_resize_nosize, "resize"},
 202         {Opt_errors, "errors=%s"},
 203         {Opt_ignore, "noquota"},
 204         {Opt_ignore, "quota"},
 205         {Opt_ignore, "usrquota"},
 206         {Opt_ignore, "grpquota"},
 207         {Opt_err, NULL}
 208 };
 209
 210 static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
 211                          int *flag)
 212 {
 213         void *nls_map = (void *)-1;     /* -1: no change;  NULL: none */
 214         char *p;
 215         struct jfs_sb_info *sbi = JFS_SBI(sb);
 216
 217         *newLVSize = 0;
 218
 219         if (!options)
 220                 return 1;
 221
 222         while ((p = strsep(&options, ",")) != NULL) {
 223                 substring_t args[MAX_OPT_ARGS];
 224                 int token;
 225                 if (!*p)
 226                         continue;
 227
 228                 token = match_token(p, tokens, args);
 229                 switch (token) {
 230                 case Opt_integrity:
 231                         *flag &= ~JFS_NOINTEGRITY;
 232                         break;
 233                 case Opt_nointegrity:
 234                         *flag |= JFS_NOINTEGRITY;
 235                         break;
 236                 case Opt_ignore:
 237                         /* Silently ignore the quota options */
 238                         /* Don't do anything ;-) */
 239                         break;
 240                 case Opt_iocharset:
 241                         if (nls_map && nls_map != (void *) -1)
 242                                 unload_nls(nls_map);
 243                         if (!strcmp(args[0].from, "none"))
 244                                 nls_map = NULL;
 245                         else {
 246                                 nls_map = load_nls(args[0].from);
 247                                 if (!nls_map) {
 248                                         printk(KERN_ERR
 249                                                "JFS: charset not found\n");
 250                                         goto cleanup;
 251                                 }
 252                         }
 253                         break;
 254                 case Opt_resize:
 255                 {
 256                         char *resize = args[0].from;
 257                         *newLVSize = simple_strtoull(resize, &resize, 0);
 258                         break;
 259                 }
 260                 case Opt_resize_nosize:
 261                 {
 262                         *newLVSize = sb->s_bdev->bd_inode->i_size >>
 263                                 sb->s_blocksize_bits;
 264                         if (*newLVSize == 0)
 265                                 printk(KERN_ERR
 266                                        "JFS: Cannot determine volume size\n");
 267                         break;
 268                 }
 269                 case Opt_errors:
 270                 {
 271                         char *errors = args[0].from;
 272                         if (!errors || !*errors)
 273                                 goto cleanup;
 274                         if (!strcmp(errors, "continue")) {
 275                                 *flag &= ~JFS_ERR_REMOUNT_RO;
 276                                 *flag &= ~JFS_ERR_PANIC;
 277                                 *flag |= JFS_ERR_CONTINUE;
 278                         } else if (!strcmp(errors, "remount-ro")) {
 279                                 *flag &= ~JFS_ERR_CONTINUE;
 280                                 *flag &= ~JFS_ERR_PANIC;
 281                                 *flag |= JFS_ERR_REMOUNT_RO;
 282                         } else if (!strcmp(errors, "panic")) {
 283                                 *flag &= ~JFS_ERR_CONTINUE;
 284                                 *flag &= ~JFS_ERR_REMOUNT_RO;
 285                                 *flag |= JFS_ERR_PANIC;
 286                         } else {
 287                                 printk(KERN_ERR
 288                                        "JFS: %s is an invalid error handler\n",
 289                                        errors);
 290                                 goto cleanup;
 291                         }
 292                         break;
 293                 }
 294                 default:
 295                         printk("jfs: Unrecognized mount option \"%s\" "
 296                                         " or missing value\n", p);
 297                         goto cleanup;
 298                 }
 299         }
 300
 301         if (nls_map != (void *) -1) {
 302                 /* Discard old (if remount) */
 303                 if (sbi->nls_tab)
 304                         unload_nls(sbi->nls_tab);
 305                 sbi->nls_tab = nls_map;
 306         }
 307         return 1;
 308
 309 cleanup:
 310         if (nls_map && nls_map != (void *) -1)
 311                 unload_nls(nls_map);
 312         return 0;
 313 }
 314
 315 static int jfs_remount(struct super_block *sb, int *flags, char *data)
 316 {
 317         s64 newLVSize = 0;
 318         int rc = 0;
 319         int flag = JFS_SBI(sb)->flag;
 320
 321         if (!parse_options(data, sb, &newLVSize, &flag)) {
 322                 return -EINVAL;
 323         }
 324         if (newLVSize) {
 325                 if (sb->s_flags & MS_RDONLY) {
 326                         printk(KERN_ERR
 327                   "JFS: resize requires volume to be mounted read-write\n");
 328                         return -EROFS;
 329                 }
 330                 rc = jfs_extendfs(sb, newLVSize, 0);
 331                 if (rc)
 332                         return rc;
 333         }
 334
 335         if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
 336                 /*
 337                  * Invalidate any previously read metadata.  fsck may have
 338                  * changed the on-disk data since we mounted r/o
 339                  */
 340                 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
 341
 342                 JFS_SBI(sb)->flag = flag;
 343                 return jfs_mount_rw(sb, 1);
 344         }
 345         if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
 346                 rc = jfs_umount_rw(sb);
 347                 JFS_SBI(sb)->flag = flag;
 348                 return rc;
 349         }
 350         if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
 351                 if (!(sb->s_flags & MS_RDONLY)) {
 352                         rc = jfs_umount_rw(sb);
 353                         if (rc)
 354                                 return rc;
 355                         JFS_SBI(sb)->flag = flag;
 356                         return jfs_mount_rw(sb, 1);
 357                 }
 358         JFS_SBI(sb)->flag = flag;
 359
 360         return 0;
 361 }
 362
 363 static int jfs_fill_super(struct super_block *sb, void *data, int silent)
 364 {
 365         struct jfs_sb_info *sbi;
 366         struct inode *inode;
 367         int rc;
 368         s64 newLVSize = 0;
 369         int flag;
 370
 371         jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
 372
 373         if (!new_valid_dev(sb->s_bdev->bd_dev))
 374                 return -EOVERFLOW;
 375
 376         sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
 377         if (!sbi)
 378                 return -ENOSPC;
 379         memset(sbi, 0, sizeof (struct jfs_sb_info));
 380         sb->s_fs_info = sbi;
 381         sbi->sb = sb;
 382
 383         /* initialize the mount flag and determine the default error handler */
 384         flag = JFS_ERR_REMOUNT_RO;
 385
 386         if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
 387                 kfree(sbi);
 388                 return -EINVAL;
 389         }
 390         sbi->flag = flag;
 391
 392 #ifdef CONFIG_JFS_POSIX_ACL
 393         sb->s_flags |= MS_POSIXACL;
 394 #endif
 395
 396         if (newLVSize) {
 397                 printk(KERN_ERR "resize option for remount only\n");
 398                 return -EINVAL;
 399         }
 400
 401         /*
 402          * Initialize blocksize to 4K.
 403          */
 404         sb_set_blocksize(sb, PSIZE);
 405
 406         /*
 407          * Set method vectors.
 408          */
 409         sb->s_op = &jfs_super_operations;
 410         sb->s_export_op = &jfs_export_operations;
 411
 412         /*
 413          * Initialize direct-mapping inode/address-space
 414          */
 415         inode = new_inode(sb);
 416         if (inode == NULL)
 417                 goto out_kfree;
 418         inode->i_ino = 0;
 419         inode->i_nlink = 1;
 420         inode->i_size = sb->s_bdev->bd_inode->i_size;
 421         inode->i_mapping->a_ops = &jfs_metapage_aops;
 422         mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 423
 424         sbi->direct_inode = inode;
 425
 426         rc = jfs_mount(sb);
 427         if (rc) {
 428                 if (!silent) {
 429                         jfs_err("jfs_mount failed w/return code = %d", rc);
 430                 }
 431                 goto out_mount_failed;
 432         }
 433         if (sb->s_flags & MS_RDONLY)
 434                 sbi->log = NULL;
 435         else {
 436                 rc = jfs_mount_rw(sb, 0);
 437                 if (rc) {
 438                         if (!silent) {
 439                                 jfs_err("jfs_mount_rw failed, return code = %d",
 440                                         rc);
 441                         }
 442                         goto out_no_rw;
 443                 }
 444         }
 445
 446         sb->s_magic = JFS_SUPER_MAGIC;
 447
 448         inode = iget(sb, ROOT_I);
 449         if (!inode || is_bad_inode(inode))
 450                 goto out_no_root;
 451         sb->s_root = d_alloc_root(inode);
 452         if (!sb->s_root)
 453                 goto out_no_root;
 454
 455         if (sbi->mntflag & JFS_OS2)
 456                 sb->s_root->d_op = &jfs_ci_dentry_operations;
 457
 458         /* logical blocks are represented by 40 bits in pxd_t, etc. */
 459         sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
 460 #if BITS_PER_LONG == 32
 461         /*
 462          * Page cache is indexed by long.
 463          * I would use MAX_LFS_FILESIZE, but it's only half as big
 464          */
 465         sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
 466 #endif
 467         sb->s_time_gran = 1;
 468         return 0;
 469
 470 out_no_root:
 471         jfs_err("jfs_read_super: get root inode failed");
 472         if (inode)
 473                 iput(inode);
 474
 475 out_no_rw:
 476         rc = jfs_umount(sb);
 477         if (rc) {
 478                 jfs_err("jfs_umount failed with return code %d", rc);
 479         }
 480 out_mount_failed:
 481         filemap_fdatawrite(sbi->direct_inode->i_mapping);
 482         filemap_fdatawait(sbi->direct_inode->i_mapping);
 483         truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
 484         make_bad_inode(sbi->direct_inode);
 485         iput(sbi->direct_inode);
 486         sbi->direct_inode = NULL;
 487 out_kfree:
 488         if (sbi->nls_tab)
 489                 unload_nls(sbi->nls_tab);
 490         kfree(sbi);
 491         return -EINVAL;
 492 }
 493
 494 static void jfs_write_super_lockfs(struct super_block *sb)
 495 {
 496         struct jfs_sb_info *sbi = JFS_SBI(sb);
 497         struct jfs_log *log = sbi->log;
 498
 499         if (!(sb->s_flags & MS_RDONLY)) {
 500                 txQuiesce(sb);
 501                 lmLogShutdown(log);
 502                 updateSuper(sb, FM_CLEAN);
 503         }
 504 }
 505
 506 static void jfs_unlockfs(struct super_block *sb)
 507 {
 508         struct jfs_sb_info *sbi = JFS_SBI(sb);
 509         struct jfs_log *log = sbi->log;
 510         int rc = 0;
 511
 512         if (!(sb->s_flags & MS_RDONLY)) {
 513                 updateSuper(sb, FM_MOUNT);
 514                 if ((rc = lmLogInit(log)))
 515                         jfs_err("jfs_unlock failed with return code %d", rc);
 516                 else
 517                         txResume(sb);
 518         }
 519 }
 520
 521 static struct super_block *jfs_get_sb(struct file_system_type *fs_type,
 522         int flags, const char *dev_name, void *data)
 523 {
 524         return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
 525 }
 526
 527 static int jfs_sync_fs(struct super_block *sb, int wait)
 528 {
 529         struct jfs_log *log = JFS_SBI(sb)->log;
 530
 531         /* log == NULL indicates read-only mount */
 532         if (log) {
 533                 jfs_flush_journal(log, wait);
 534                 jfs_syncpt(log);
 535         }
 536
 537         return 0;
 538 }
 539
 540 static struct super_operations jfs_super_operations = {
 541         .alloc_inode    = jfs_alloc_inode,
 542         .destroy_inode  = jfs_destroy_inode,
 543         .read_inode     = jfs_read_inode,
 544         .dirty_inode    = jfs_dirty_inode,
 545         .write_inode    = jfs_write_inode,
 546         .delete_inode   = jfs_delete_inode,
 547         .put_super      = jfs_put_super,
 548         .sync_fs        = jfs_sync_fs,
 549         .write_super_lockfs = jfs_write_super_lockfs,
 550         .unlockfs       = jfs_unlockfs,
 551         .statfs         = jfs_statfs,
 552         .remount_fs     = jfs_remount,
 553 };
 554
 555 static struct export_operations jfs_export_operations = {
 556         .get_parent     = jfs_get_parent,
 557 };
 558
 559 static struct file_system_type jfs_fs_type = {
 560         .owner          = THIS_MODULE,
 561         .name           = "jfs",
 562         .get_sb         = jfs_get_sb,
 563         .kill_sb        = kill_block_super,
 564         .fs_flags       = FS_REQUIRES_DEV,
 565 };
 566
 567 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
 568 {
 569         struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
 570
 571         if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
 572             SLAB_CTOR_CONSTRUCTOR) {
 573                 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
 574                 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
 575                 init_rwsem(&jfs_ip->rdwrlock);
 576                 init_MUTEX(&jfs_ip->commit_sem);
 577                 init_rwsem(&jfs_ip->xattr_sem);
 578                 spin_lock_init(&jfs_ip->ag_lock);
 579                 jfs_ip->active_ag = -1;
 580 #ifdef CONFIG_JFS_POSIX_ACL
 581                 jfs_ip->i_acl = JFS_ACL_NOT_CACHED;
 582                 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED;
 583 #endif
 584                 inode_init_once(&jfs_ip->vfs_inode);
 585         }
 586 }
 587
 588 static int __init init_jfs_fs(void)
 589 {
 590         int i;
 591         int rc;
 592
 593         jfs_inode_cachep =
 594             kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
 595                             SLAB_RECLAIM_ACCOUNT, init_once, NULL);
 596         if (jfs_inode_cachep == NULL)
 597                 return -ENOMEM;
 598
 599         /*
 600          * Metapage initialization
 601          */
 602         rc = metapage_init();
 603         if (rc) {
 604                 jfs_err("metapage_init failed w/rc = %d", rc);
 605                 goto free_slab;
 606         }
 607
 608         /*
 609          * Transaction Manager initialization
 610          */
 611         rc = txInit();
 612         if (rc) {
 613                 jfs_err("txInit failed w/rc = %d", rc);
 614                 goto free_metapage;
 615         }
 616
 617         /*
 618          * I/O completion thread (endio)
 619          */
 620         jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL);
 621         if (jfsIOthread < 0) {
 622                 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread);
 623                 goto end_txmngr;
 624         }
 625         wait_for_completion(&jfsIOwait);        /* Wait until thread starts */
 626
 627         if (commit_threads < 1)
 628                 commit_threads = num_online_cpus();
 629         if (commit_threads > MAX_COMMIT_THREADS)
 630                 commit_threads = MAX_COMMIT_THREADS;
 631
 632         for (i = 0; i < commit_threads; i++) {
 633                 jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL,
 634                                                    CLONE_KERNEL);
 635                 if (jfsCommitThread[i] < 0) {
 636                         jfs_err("init_jfs_fs: fork failed w/rc = %d",
 637                                 jfsCommitThread[i]);
 638                         commit_threads = i;
 639                         goto kill_committask;
 640                 }
 641                 /* Wait until thread starts */
 642                 wait_for_completion(&jfsIOwait);
 643         }
 644
 645         jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL);
 646         if (jfsSyncThread < 0) {
 647                 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread);
 648                 goto kill_committask;
 649         }
 650         wait_for_completion(&jfsIOwait);        /* Wait until thread starts */
 651
 652 #ifdef PROC_FS_JFS
 653         jfs_proc_init();
 654 #endif
 655
 656         return register_filesystem(&jfs_fs_type);
 657
 658 kill_committask:
 659         jfs_stop_threads = 1;
 660         wake_up_all(&jfs_commit_thread_wait);
 661         for (i = 0; i < commit_threads; i++)
 662                 wait_for_completion(&jfsIOwait);
 663
 664         wake_up(&jfs_IO_thread_wait);
 665         wait_for_completion(&jfsIOwait);        /* Wait for thread exit */
 666 end_txmngr:
 667         txExit();
 668 free_metapage:
 669         metapage_exit();
 670 free_slab:
 671         kmem_cache_destroy(jfs_inode_cachep);
 672         return rc;
 673 }
 674
 675 static void __exit exit_jfs_fs(void)
 676 {
 677         int i;
 678
 679         jfs_info("exit_jfs_fs called");
 680
 681         jfs_stop_threads = 1;
 682         txExit();
 683         metapage_exit();
 684         wake_up(&jfs_IO_thread_wait);
 685         wait_for_completion(&jfsIOwait);        /* Wait until IO thread exits */
 686         wake_up_all(&jfs_commit_thread_wait);
 687         for (i = 0; i < commit_threads; i++)
 688                 wait_for_completion(&jfsIOwait);
 689         wake_up(&jfs_sync_thread_wait);
 690         wait_for_completion(&jfsIOwait);        /* Wait until Sync thread exits */
 691 #ifdef PROC_FS_JFS
 692         jfs_proc_clean();
 693 #endif
 694         unregister_filesystem(&jfs_fs_type);
 695         kmem_cache_destroy(jfs_inode_cachep);
 696 }
 697
 698 module_init(init_jfs_fs)
 699 module_exit(exit_jfs_fs)