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_metapage.h" 32 #include "jfs_superblock.h" 33 #include "jfs_dmap.h" 34 #include "jfs_imap.h" 35 #include "jfs_acl.h" 36 #include "jfs_debug.h" 37 38 MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); 39 MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); 40 MODULE_LICENSE("GPL"); 41 42 static kmem_cache_t * jfs_inode_cachep; 43 44 static struct super_operations jfs_super_operations; 45 static struct export_operations jfs_export_operations; 46 static struct file_system_type jfs_fs_type; 47 48 #define MAX_COMMIT_THREADS 64 49 static int commit_threads = 0; 50 module_param(commit_threads, int, 0); 51 MODULE_PARM_DESC(commit_threads, "Number of commit threads"); 52 53 int jfs_stop_threads; 54 static pid_t jfsIOthread; 55 static pid_t jfsCommitThread[MAX_COMMIT_THREADS]; 56 static pid_t jfsSyncThread; 57 DECLARE_COMPLETION(jfsIOwait); 58 59 #ifdef CONFIG_JFS_DEBUG 60 int jfsloglevel = JFS_LOGLEVEL_WARN; 61 module_param(jfsloglevel, int, 0644); 62 MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); 63 #endif 64 65 /* 66 * External declarations 67 */ 68 extern int jfs_mount(struct super_block *); 69 extern int jfs_mount_rw(struct super_block *, int); 70 extern int jfs_umount(struct super_block *); 71 extern int jfs_umount_rw(struct super_block *); 72 73 extern int jfsIOWait(void *); 74 extern int jfs_lazycommit(void *); 75 extern int jfs_sync(void *); 76 77 extern void jfs_read_inode(struct inode *inode); 78 extern void jfs_dirty_inode(struct inode *inode); 79 extern void jfs_delete_inode(struct inode *inode); 80 extern int jfs_write_inode(struct inode *inode, int wait); 81 82 extern struct dentry *jfs_get_parent(struct dentry *dentry); 83 extern int jfs_extendfs(struct super_block *, s64, int); 84 85 extern struct dentry_operations jfs_ci_dentry_operations; 86 87 #ifdef PROC_FS_JFS /* see jfs_debug.h */ 88 extern void jfs_proc_init(void); 89 extern void jfs_proc_clean(void); 90 #endif 91 92 extern wait_queue_head_t jfs_IO_thread_wait; 93 extern wait_queue_head_t jfs_commit_thread_wait; 94 extern wait_queue_head_t jfs_sync_thread_wait; 95 96 static void jfs_handle_error(struct super_block *sb) 97 { 98 struct jfs_sb_info *sbi = JFS_SBI(sb); 99 100 if (sb->s_flags & MS_RDONLY) 101 return; 102 103 updateSuper(sb, FM_DIRTY); 104 105 if (sbi->flag & JFS_ERR_PANIC) 106 panic("JFS (device %s): panic forced after error\n", 107 sb->s_id); 108 else if (sbi->flag & JFS_ERR_REMOUNT_RO) { 109 jfs_err("ERROR: (device %s): remounting filesystem " 110 "as read-only\n", 111 sb->s_id); 112 sb->s_flags |= MS_RDONLY; 113 } 114 115 /* nothing is done for continue beyond marking the superblock dirty */ 116 } 117 118 void jfs_error(struct super_block *sb, const char * function, ...) 119 { 120 static char error_buf[256]; 121 va_list args; 122 123 va_start(args, function); 124 vsprintf(error_buf, function, args); 125 va_end(args); 126 127 printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf); 128 129 jfs_handle_error(sb); 130 } 131 132 static struct inode *jfs_alloc_inode(struct super_block *sb) 133 { 134 struct jfs_inode_info *jfs_inode; 135 136 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); 137 if (!jfs_inode) 138 return NULL; 139 return &jfs_inode->vfs_inode; 140 } 141 142 static void jfs_destroy_inode(struct inode *inode) 143 { 144 struct jfs_inode_info *ji = JFS_IP(inode); 145 146 spin_lock_irq(&ji->ag_lock); 147 if (ji->active_ag != -1) { 148 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; 149 atomic_dec(&bmap->db_active[ji->active_ag]); 150 ji->active_ag = -1; 151 } 152 spin_unlock_irq(&ji->ag_lock); 153 154 #ifdef CONFIG_JFS_POSIX_ACL 155 if (ji->i_acl != JFS_ACL_NOT_CACHED) { 156 posix_acl_release(ji->i_acl); 157 ji->i_acl = JFS_ACL_NOT_CACHED; 158 } 159 if (ji->i_default_acl != JFS_ACL_NOT_CACHED) { 160 posix_acl_release(ji->i_default_acl); 161 ji->i_default_acl = JFS_ACL_NOT_CACHED; 162 } 163 #endif 164 165 kmem_cache_free(jfs_inode_cachep, ji); 166 } 167 168 static int jfs_statfs(struct super_block *sb, struct kstatfs *buf) 169 { 170 struct jfs_sb_info *sbi = JFS_SBI(sb); 171 s64 maxinodes; 172 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; 173 174 jfs_info("In jfs_statfs"); 175 buf->f_type = JFS_SUPER_MAGIC; 176 buf->f_bsize = sbi->bsize; 177 buf->f_blocks = sbi->bmap->db_mapsize; 178 buf->f_bfree = sbi->bmap->db_nfree; 179 buf->f_bavail = sbi->bmap->db_nfree; 180 /* 181 * If we really return the number of allocated & free inodes, some 182 * applications will fail because they won't see enough free inodes. 183 * We'll try to calculate some guess as to how may inodes we can 184 * really allocate 185 * 186 * buf->f_files = atomic_read(&imap->im_numinos); 187 * buf->f_ffree = atomic_read(&imap->im_numfree); 188 */ 189 maxinodes = min((s64) atomic_read(&imap->im_numinos) + 190 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) 191 << L2INOSPEREXT), (s64) 0xffffffffLL); 192 buf->f_files = maxinodes; 193 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - 194 atomic_read(&imap->im_numfree)); 195 196 buf->f_namelen = JFS_NAME_MAX; 197 return 0; 198 } 199 200 static void jfs_put_super(struct super_block *sb) 201 { 202 struct jfs_sb_info *sbi = JFS_SBI(sb); 203 int rc; 204 205 jfs_info("In jfs_put_super"); 206 rc = jfs_umount(sb); 207 if (rc) 208 jfs_err("jfs_umount failed with return code %d", rc); 209 if (sbi->nls_tab) 210 unload_nls(sbi->nls_tab); 211 sbi->nls_tab = NULL; 212 213 kfree(sbi); 214 } 215 216 enum { 217 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, 218 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, 219 }; 220 221 static match_table_t tokens = { 222 {Opt_integrity, "integrity"}, 223 {Opt_nointegrity, "nointegrity"}, 224 {Opt_iocharset, "iocharset=%s"}, 225 {Opt_resize, "resize=%u"}, 226 {Opt_resize_nosize, "resize"}, 227 {Opt_errors, "errors=%s"}, 228 {Opt_ignore, "noquota"}, 229 {Opt_ignore, "quota"}, 230 {Opt_ignore, "usrquota"}, 231 {Opt_ignore, "grpquota"}, 232 {Opt_err, NULL} 233 }; 234 235 static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, 236 int *flag) 237 { 238 void *nls_map = (void *)-1; /* -1: no change; NULL: none */ 239 char *p; 240 struct jfs_sb_info *sbi = JFS_SBI(sb); 241 242 *newLVSize = 0; 243 244 if (!options) 245 return 1; 246 247 while ((p = strsep(&options, ",")) != NULL) { 248 substring_t args[MAX_OPT_ARGS]; 249 int token; 250 if (!*p) 251 continue; 252 253 token = match_token(p, tokens, args); 254 switch (token) { 255 case Opt_integrity: 256 *flag &= ~JFS_NOINTEGRITY; 257 break; 258 case Opt_nointegrity: 259 *flag |= JFS_NOINTEGRITY; 260 break; 261 case Opt_ignore: 262 /* Silently ignore the quota options */ 263 /* Don't do anything ;-) */ 264 break; 265 case Opt_iocharset: 266 if (nls_map && nls_map != (void *) -1) 267 unload_nls(nls_map); 268 if (!strcmp(args[0].from, "none")) 269 nls_map = NULL; 270 else { 271 nls_map = load_nls(args[0].from); 272 if (!nls_map) { 273 printk(KERN_ERR 274 "JFS: charset not found\n"); 275 goto cleanup; 276 } 277 } 278 break; 279 case Opt_resize: 280 { 281 char *resize = args[0].from; 282 *newLVSize = simple_strtoull(resize, &resize, 0); 283 break; 284 } 285 case Opt_resize_nosize: 286 { 287 *newLVSize = sb->s_bdev->bd_inode->i_size >> 288 sb->s_blocksize_bits; 289 if (*newLVSize == 0) 290 printk(KERN_ERR 291 "JFS: Cannot determine volume size\n"); 292 break; 293 } 294 case Opt_errors: 295 { 296 char *errors = args[0].from; 297 if (!errors || !*errors) 298 goto cleanup; 299 if (!strcmp(errors, "continue")) { 300 *flag &= ~JFS_ERR_REMOUNT_RO; 301 *flag &= ~JFS_ERR_PANIC; 302 *flag |= JFS_ERR_CONTINUE; 303 } else if (!strcmp(errors, "remount-ro")) { 304 *flag &= ~JFS_ERR_CONTINUE; 305 *flag &= ~JFS_ERR_PANIC; 306 *flag |= JFS_ERR_REMOUNT_RO; 307 } else if (!strcmp(errors, "panic")) { 308 *flag &= ~JFS_ERR_CONTINUE; 309 *flag &= ~JFS_ERR_REMOUNT_RO; 310 *flag |= JFS_ERR_PANIC; 311 } else { 312 printk(KERN_ERR 313 "JFS: %s is an invalid error handler\n", 314 errors); 315 goto cleanup; 316 } 317 break; 318 } 319 default: 320 printk("jfs: Unrecognized mount option \"%s\" " 321 " or missing value\n", p); 322 goto cleanup; 323 } 324 } 325 326 if (nls_map != (void *) -1) { 327 /* Discard old (if remount) */ 328 if (sbi->nls_tab) 329 unload_nls(sbi->nls_tab); 330 sbi->nls_tab = nls_map; 331 } 332 return 1; 333 334 cleanup: 335 if (nls_map && nls_map != (void *) -1) 336 unload_nls(nls_map); 337 return 0; 338 } 339 340 static int jfs_remount(struct super_block *sb, int *flags, char *data) 341 { 342 s64 newLVSize = 0; 343 int rc = 0; 344 int flag = JFS_SBI(sb)->flag; 345 346 if (!parse_options(data, sb, &newLVSize, &flag)) { 347 return -EINVAL; 348 } 349 if (newLVSize) { 350 if (sb->s_flags & MS_RDONLY) { 351 printk(KERN_ERR 352 "JFS: resize requires volume to be mounted read-write\n"); 353 return -EROFS; 354 } 355 rc = jfs_extendfs(sb, newLVSize, 0); 356 if (rc) 357 return rc; 358 } 359 360 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { 361 JFS_SBI(sb)->flag = flag; 362 return jfs_mount_rw(sb, 1); 363 } 364 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { 365 rc = jfs_umount_rw(sb); 366 JFS_SBI(sb)->flag = flag; 367 return rc; 368 } 369 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) 370 if (!(sb->s_flags & MS_RDONLY)) { 371 rc = jfs_umount_rw(sb); 372 if (rc) 373 return rc; 374 JFS_SBI(sb)->flag = flag; 375 return jfs_mount_rw(sb, 1); 376 } 377 JFS_SBI(sb)->flag = flag; 378 379 return 0; 380 } 381 382 static int jfs_fill_super(struct super_block *sb, void *data, int silent) 383 { 384 struct jfs_sb_info *sbi; 385 struct inode *inode; 386 int rc; 387 s64 newLVSize = 0; 388 int flag; 389 390 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); 391 392 if (!new_valid_dev(sb->s_bdev->bd_dev)) 393 return -EOVERFLOW; 394 395 sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); 396 if (!sbi) 397 return -ENOSPC; 398 memset(sbi, 0, sizeof (struct jfs_sb_info)); 399 sb->s_fs_info = sbi; 400 sbi->sb = sb; 401 402 /* initialize the mount flag and determine the default error handler */ 403 flag = JFS_ERR_REMOUNT_RO; 404 405 if (!parse_options((char *) data, sb, &newLVSize, &flag)) { 406 kfree(sbi); 407 return -EINVAL; 408 } 409 sbi->flag = flag; 410 411 #ifdef CONFIG_JFS_POSIX_ACL 412 sb->s_flags |= MS_POSIXACL; 413 #endif 414 415 if (newLVSize) { 416 printk(KERN_ERR "resize option for remount only\n"); 417 return -EINVAL; 418 } 419 420 /* 421 * Initialize blocksize to 4K. 422 */ 423 sb_set_blocksize(sb, PSIZE); 424 425 /* 426 * Set method vectors. 427 */ 428 sb->s_op = &jfs_super_operations; 429 sb->s_export_op = &jfs_export_operations; 430 431 rc = jfs_mount(sb); 432 if (rc) { 433 if (!silent) { 434 jfs_err("jfs_mount failed w/return code = %d", rc); 435 } 436 goto out_kfree; 437 } 438 if (sb->s_flags & MS_RDONLY) 439 sbi->log = NULL; 440 else { 441 rc = jfs_mount_rw(sb, 0); 442 if (rc) { 443 if (!silent) { 444 jfs_err("jfs_mount_rw failed, return code = %d", 445 rc); 446 } 447 goto out_no_rw; 448 } 449 } 450 451 sb->s_magic = JFS_SUPER_MAGIC; 452 453 inode = iget(sb, ROOT_I); 454 if (!inode || is_bad_inode(inode)) 455 goto out_no_root; 456 sb->s_root = d_alloc_root(inode); 457 if (!sb->s_root) 458 goto out_no_root; 459 460 if (sbi->mntflag & JFS_OS2) 461 sb->s_root->d_op = &jfs_ci_dentry_operations; 462 463 /* logical blocks are represented by 40 bits in pxd_t, etc. */ 464 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; 465 #if BITS_PER_LONG == 32 466 /* 467 * Page cache is indexed by long. 468 * I would use MAX_LFS_FILESIZE, but it's only half as big 469 */ 470 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); 471 #endif 472 sb->s_time_gran = 1; 473 return 0; 474 475 out_no_root: 476 jfs_err("jfs_read_super: get root inode failed"); 477 if (inode) 478 iput(inode); 479 480 out_no_rw: 481 rc = jfs_umount(sb); 482 if (rc) { 483 jfs_err("jfs_umount failed with return code %d", rc); 484 } 485 out_kfree: 486 if (sbi->nls_tab) 487 unload_nls(sbi->nls_tab); 488 kfree(sbi); 489 return -EINVAL; 490 } 491 492 static void jfs_write_super_lockfs(struct super_block *sb) 493 { 494 struct jfs_sb_info *sbi = JFS_SBI(sb); 495 struct jfs_log *log = sbi->log; 496 497 if (!(sb->s_flags & MS_RDONLY)) { 498 txQuiesce(sb); 499 lmLogShutdown(log); 500 updateSuper(sb, FM_CLEAN); 501 } 502 } 503 504 static void jfs_unlockfs(struct super_block *sb) 505 { 506 struct jfs_sb_info *sbi = JFS_SBI(sb); 507 struct jfs_log *log = sbi->log; 508 int rc = 0; 509 510 if (!(sb->s_flags & MS_RDONLY)) { 511 updateSuper(sb, FM_MOUNT); 512 if ((rc = lmLogInit(log))) 513 jfs_err("jfs_unlock failed with return code %d", rc); 514 else 515 txResume(sb); 516 } 517 } 518 519 static struct super_block *jfs_get_sb(struct file_system_type *fs_type, 520 int flags, const char *dev_name, void *data) 521 { 522 return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super); 523 } 524 525 static int jfs_sync_fs(struct super_block *sb, int wait) 526 { 527 struct jfs_log *log = JFS_SBI(sb)->log; 528 529 /* log == NULL indicates read-only mount */ 530 if (log) 531 jfs_flush_journal(log, wait); 532 533 return 0; 534 } 535 536 static struct super_operations jfs_super_operations = { 537 .alloc_inode = jfs_alloc_inode, 538 .destroy_inode = jfs_destroy_inode, 539 .read_inode = jfs_read_inode, 540 .dirty_inode = jfs_dirty_inode, 541 .write_inode = jfs_write_inode, 542 .delete_inode = jfs_delete_inode, 543 .put_super = jfs_put_super, 544 .sync_fs = jfs_sync_fs, 545 .write_super_lockfs = jfs_write_super_lockfs, 546 .unlockfs = jfs_unlockfs, 547 .statfs = jfs_statfs, 548 .remount_fs = jfs_remount, 549 }; 550 551 static struct export_operations jfs_export_operations = { 552 .get_parent = jfs_get_parent, 553 }; 554 555 static struct file_system_type jfs_fs_type = { 556 .owner = THIS_MODULE, 557 .name = "jfs", 558 .get_sb = jfs_get_sb, 559 .kill_sb = kill_block_super, 560 .fs_flags = FS_REQUIRES_DEV, 561 }; 562 563 extern int metapage_init(void); 564 extern int txInit(void); 565 extern void txExit(void); 566 extern void metapage_exit(void); 567 568 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags) 569 { 570 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; 571 572 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == 573 SLAB_CTOR_CONSTRUCTOR) { 574 memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); 575 INIT_LIST_HEAD(&jfs_ip->anon_inode_list); 576 init_rwsem(&jfs_ip->rdwrlock); 577 init_MUTEX(&jfs_ip->commit_sem); 578 init_rwsem(&jfs_ip->xattr_sem); 579 spin_lock_init(&jfs_ip->ag_lock); 580 jfs_ip->active_ag = -1; 581 #ifdef CONFIG_JFS_POSIX_ACL 582 jfs_ip->i_acl = JFS_ACL_NOT_CACHED; 583 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; 584 #endif 585 inode_init_once(&jfs_ip->vfs_inode); 586 } 587 } 588 589 static int __init init_jfs_fs(void) 590 { 591 int i; 592 int rc; 593 594 jfs_inode_cachep = 595 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, 596 SLAB_RECLAIM_ACCOUNT, init_once, NULL); 597 if (jfs_inode_cachep == NULL) 598 return -ENOMEM; 599 600 /* 601 * Metapage initialization 602 */ 603 rc = metapage_init(); 604 if (rc) { 605 jfs_err("metapage_init failed w/rc = %d", rc); 606 goto free_slab; 607 } 608 609 /* 610 * Transaction Manager initialization 611 */ 612 rc = txInit(); 613 if (rc) { 614 jfs_err("txInit failed w/rc = %d", rc); 615 goto free_metapage; 616 } 617 618 /* 619 * I/O completion thread (endio) 620 */ 621 jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL); 622 if (jfsIOthread < 0) { 623 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread); 624 goto end_txmngr; 625 } 626 wait_for_completion(&jfsIOwait); /* Wait until thread starts */ 627 628 if (commit_threads < 1) 629 commit_threads = num_online_cpus(); 630 if (commit_threads > MAX_COMMIT_THREADS) 631 commit_threads = MAX_COMMIT_THREADS; 632 633 for (i = 0; i < commit_threads; i++) { 634 jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL, 635 CLONE_KERNEL); 636 if (jfsCommitThread[i] < 0) { 637 jfs_err("init_jfs_fs: fork failed w/rc = %d", 638 jfsCommitThread[i]); 639 commit_threads = i; 640 goto kill_committask; 641 } 642 /* Wait until thread starts */ 643 wait_for_completion(&jfsIOwait); 644 } 645 646 jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL); 647 if (jfsSyncThread < 0) { 648 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread); 649 goto kill_committask; 650 } 651 wait_for_completion(&jfsIOwait); /* Wait until thread starts */ 652 653 #ifdef PROC_FS_JFS 654 jfs_proc_init(); 655 #endif 656 657 return register_filesystem(&jfs_fs_type); 658 659 kill_committask: 660 jfs_stop_threads = 1; 661 wake_up_all(&jfs_commit_thread_wait); 662 for (i = 0; i < commit_threads; i++) 663 wait_for_completion(&jfsIOwait); 664 665 wake_up(&jfs_IO_thread_wait); 666 wait_for_completion(&jfsIOwait); /* Wait for thread exit */ 667 end_txmngr: 668 txExit(); 669 free_metapage: 670 metapage_exit(); 671 free_slab: 672 kmem_cache_destroy(jfs_inode_cachep); 673 return rc; 674 } 675 676 static void __exit exit_jfs_fs(void) 677 { 678 int i; 679 680 jfs_info("exit_jfs_fs called"); 681 682 jfs_stop_threads = 1; 683 txExit(); 684 metapage_exit(); 685 wake_up(&jfs_IO_thread_wait); 686 wait_for_completion(&jfsIOwait); /* Wait until IO thread exits */ 687 wake_up_all(&jfs_commit_thread_wait); 688 for (i = 0; i < commit_threads; i++) 689 wait_for_completion(&jfsIOwait); 690 wake_up(&jfs_sync_thread_wait); 691 wait_for_completion(&jfsIOwait); /* Wait until Sync thread exits */ 692 #ifdef PROC_FS_JFS 693 jfs_proc_clean(); 694 #endif 695 unregister_filesystem(&jfs_fs_type); 696 kmem_cache_destroy(jfs_inode_cachep); 697 } 698 699 module_init(init_jfs_fs) 700 module_exit(exit_jfs_fs) 701