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