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) 700