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 truncate_inode_pages(sbi->direct_inode->i_mapping, 0); 214 iput(sbi->direct_inode); 215 sbi->direct_inode = NULL; 216 217 kfree(sbi); 218 } 219 220 enum { 221 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, 222 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, 223 }; 224 225 static match_table_t tokens = { 226 {Opt_integrity, "integrity"}, 227 {Opt_nointegrity, "nointegrity"}, 228 {Opt_iocharset, "iocharset=%s"}, 229 {Opt_resize, "resize=%u"}, 230 {Opt_resize_nosize, "resize"}, 231 {Opt_errors, "errors=%s"}, 232 {Opt_ignore, "noquota"}, 233 {Opt_ignore, "quota"}, 234 {Opt_ignore, "usrquota"}, 235 {Opt_ignore, "grpquota"}, 236 {Opt_err, NULL} 237 }; 238 239 static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, 240 int *flag) 241 { 242 void *nls_map = (void *)-1; /* -1: no change; NULL: none */ 243 char *p; 244 struct jfs_sb_info *sbi = JFS_SBI(sb); 245 246 *newLVSize = 0; 247 248 if (!options) 249 return 1; 250 251 while ((p = strsep(&options, ",")) != NULL) { 252 substring_t args[MAX_OPT_ARGS]; 253 int token; 254 if (!*p) 255 continue; 256 257 token = match_token(p, tokens, args); 258 switch (token) { 259 case Opt_integrity: 260 *flag &= ~JFS_NOINTEGRITY; 261 break; 262 case Opt_nointegrity: 263 *flag |= JFS_NOINTEGRITY; 264 break; 265 case Opt_ignore: 266 /* Silently ignore the quota options */ 267 /* Don't do anything ;-) */ 268 break; 269 case Opt_iocharset: 270 if (nls_map && nls_map != (void *) -1) 271 unload_nls(nls_map); 272 if (!strcmp(args[0].from, "none")) 273 nls_map = NULL; 274 else { 275 nls_map = load_nls(args[0].from); 276 if (!nls_map) { 277 printk(KERN_ERR 278 "JFS: charset not found\n"); 279 goto cleanup; 280 } 281 } 282 break; 283 case Opt_resize: 284 { 285 char *resize = args[0].from; 286 *newLVSize = simple_strtoull(resize, &resize, 0); 287 break; 288 } 289 case Opt_resize_nosize: 290 { 291 *newLVSize = sb->s_bdev->bd_inode->i_size >> 292 sb->s_blocksize_bits; 293 if (*newLVSize == 0) 294 printk(KERN_ERR 295 "JFS: Cannot determine volume size\n"); 296 break; 297 } 298 case Opt_errors: 299 { 300 char *errors = args[0].from; 301 if (!errors || !*errors) 302 goto cleanup; 303 if (!strcmp(errors, "continue")) { 304 *flag &= ~JFS_ERR_REMOUNT_RO; 305 *flag &= ~JFS_ERR_PANIC; 306 *flag |= JFS_ERR_CONTINUE; 307 } else if (!strcmp(errors, "remount-ro")) { 308 *flag &= ~JFS_ERR_CONTINUE; 309 *flag &= ~JFS_ERR_PANIC; 310 *flag |= JFS_ERR_REMOUNT_RO; 311 } else if (!strcmp(errors, "panic")) { 312 *flag &= ~JFS_ERR_CONTINUE; 313 *flag &= ~JFS_ERR_REMOUNT_RO; 314 *flag |= JFS_ERR_PANIC; 315 } else { 316 printk(KERN_ERR 317 "JFS: %s is an invalid error handler\n", 318 errors); 319 goto cleanup; 320 } 321 break; 322 } 323 default: 324 printk("jfs: Unrecognized mount option \"%s\" " 325 " or missing value\n", p); 326 goto cleanup; 327 } 328 } 329 330 if (nls_map != (void *) -1) { 331 /* Discard old (if remount) */ 332 if (sbi->nls_tab) 333 unload_nls(sbi->nls_tab); 334 sbi->nls_tab = nls_map; 335 } 336 return 1; 337 338 cleanup: 339 if (nls_map && nls_map != (void *) -1) 340 unload_nls(nls_map); 341 return 0; 342 } 343 344 static int jfs_remount(struct super_block *sb, int *flags, char *data) 345 { 346 s64 newLVSize = 0; 347 int rc = 0; 348 int flag = JFS_SBI(sb)->flag; 349 350 if (!parse_options(data, sb, &newLVSize, &flag)) { 351 return -EINVAL; 352 } 353 if (newLVSize) { 354 if (sb->s_flags & MS_RDONLY) { 355 printk(KERN_ERR 356 "JFS: resize requires volume to be mounted read-write\n"); 357 return -EROFS; 358 } 359 rc = jfs_extendfs(sb, newLVSize, 0); 360 if (rc) 361 return rc; 362 } 363 364 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { 365 /* 366 * Invalidate any previously read metadata. fsck may have 367 * changed the on-disk data since we mounted r/o 368 */ 369 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); 370 371 JFS_SBI(sb)->flag = flag; 372 return jfs_mount_rw(sb, 1); 373 } 374 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { 375 rc = jfs_umount_rw(sb); 376 JFS_SBI(sb)->flag = flag; 377 return rc; 378 } 379 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) 380 if (!(sb->s_flags & MS_RDONLY)) { 381 rc = jfs_umount_rw(sb); 382 if (rc) 383 return rc; 384 JFS_SBI(sb)->flag = flag; 385 return jfs_mount_rw(sb, 1); 386 } 387 JFS_SBI(sb)->flag = flag; 388 389 return 0; 390 } 391 392 static int jfs_fill_super(struct super_block *sb, void *data, int silent) 393 { 394 struct jfs_sb_info *sbi; 395 struct inode *inode; 396 int rc; 397 s64 newLVSize = 0; 398 int flag; 399 400 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); 401 402 if (!new_valid_dev(sb->s_bdev->bd_dev)) 403 return -EOVERFLOW; 404 405 sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); 406 if (!sbi) 407 return -ENOSPC; 408 memset(sbi, 0, sizeof (struct jfs_sb_info)); 409 sb->s_fs_info = sbi; 410 sbi->sb = sb; 411 412 /* initialize the mount flag and determine the default error handler */ 413 flag = JFS_ERR_REMOUNT_RO; 414 415 if (!parse_options((char *) data, sb, &newLVSize, &flag)) { 416 kfree(sbi); 417 return -EINVAL; 418 } 419 sbi->flag = flag; 420 421 #ifdef CONFIG_JFS_POSIX_ACL 422 sb->s_flags |= MS_POSIXACL; 423 #endif 424 425 if (newLVSize) { 426 printk(KERN_ERR "resize option for remount only\n"); 427 return -EINVAL; 428 } 429 430 /* 431 * Initialize blocksize to 4K. 432 */ 433 sb_set_blocksize(sb, PSIZE); 434 435 /* 436 * Set method vectors. 437 */ 438 sb->s_op = &jfs_super_operations; 439 sb->s_export_op = &jfs_export_operations; 440 441 /* 442 * Initialize direct-mapping inode/address-space 443 */ 444 inode = new_inode(sb); 445 if (inode == NULL) 446 goto out_kfree; 447 inode->i_ino = 0; 448 inode->i_nlink = 1; 449 inode->i_size = sb->s_bdev->bd_inode->i_size; 450 inode->i_mapping->a_ops = &jfs_metapage_aops; 451 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); 452 453 sbi->direct_inode = inode; 454 455 rc = jfs_mount(sb); 456 if (rc) { 457 if (!silent) { 458 jfs_err("jfs_mount failed w/return code = %d", rc); 459 } 460 goto out_mount_failed; 461 } 462 if (sb->s_flags & MS_RDONLY) 463 sbi->log = NULL; 464 else { 465 rc = jfs_mount_rw(sb, 0); 466 if (rc) { 467 if (!silent) { 468 jfs_err("jfs_mount_rw failed, return code = %d", 469 rc); 470 } 471 goto out_no_rw; 472 } 473 } 474 475 sb->s_magic = JFS_SUPER_MAGIC; 476 477 inode = iget(sb, ROOT_I); 478 if (!inode || is_bad_inode(inode)) 479 goto out_no_root; 480 sb->s_root = d_alloc_root(inode); 481 if (!sb->s_root) 482 goto out_no_root; 483 484 if (sbi->mntflag & JFS_OS2) 485 sb->s_root->d_op = &jfs_ci_dentry_operations; 486 487 /* logical blocks are represented by 40 bits in pxd_t, etc. */ 488 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; 489 #if BITS_PER_LONG == 32 490 /* 491 * Page cache is indexed by long. 492 * I would use MAX_LFS_FILESIZE, but it's only half as big 493 */ 494 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); 495 #endif 496 sb->s_time_gran = 1; 497 return 0; 498 499 out_no_root: 500 jfs_err("jfs_read_super: get root inode failed"); 501 if (inode) 502 iput(inode); 503 504 out_no_rw: 505 rc = jfs_umount(sb); 506 if (rc) { 507 jfs_err("jfs_umount failed with return code %d", rc); 508 } 509 out_mount_failed: 510 filemap_fdatawrite(sbi->direct_inode->i_mapping); 511 filemap_fdatawait(sbi->direct_inode->i_mapping); 512 truncate_inode_pages(sbi->direct_inode->i_mapping, 0); 513 make_bad_inode(sbi->direct_inode); 514 iput(sbi->direct_inode); 515 sbi->direct_inode = NULL; 516 out_kfree: 517 if (sbi->nls_tab) 518 unload_nls(sbi->nls_tab); 519 kfree(sbi); 520 return -EINVAL; 521 } 522 523 static void jfs_write_super_lockfs(struct super_block *sb) 524 { 525 struct jfs_sb_info *sbi = JFS_SBI(sb); 526 struct jfs_log *log = sbi->log; 527 528 if (!(sb->s_flags & MS_RDONLY)) { 529 txQuiesce(sb); 530 lmLogShutdown(log); 531 updateSuper(sb, FM_CLEAN); 532 } 533 } 534 535 static void jfs_unlockfs(struct super_block *sb) 536 { 537 struct jfs_sb_info *sbi = JFS_SBI(sb); 538 struct jfs_log *log = sbi->log; 539 int rc = 0; 540 541 if (!(sb->s_flags & MS_RDONLY)) { 542 updateSuper(sb, FM_MOUNT); 543 if ((rc = lmLogInit(log))) 544 jfs_err("jfs_unlock failed with return code %d", rc); 545 else 546 txResume(sb); 547 } 548 } 549 550 static struct super_block *jfs_get_sb(struct file_system_type *fs_type, 551 int flags, const char *dev_name, void *data) 552 { 553 return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super); 554 } 555 556 static int jfs_sync_fs(struct super_block *sb, int wait) 557 { 558 struct jfs_log *log = JFS_SBI(sb)->log; 559 560 /* log == NULL indicates read-only mount */ 561 if (log) { 562 jfs_flush_journal(log, wait); 563 jfs_syncpt(log); 564 } 565 566 return 0; 567 } 568 569 static struct super_operations jfs_super_operations = { 570 .alloc_inode = jfs_alloc_inode, 571 .destroy_inode = jfs_destroy_inode, 572 .read_inode = jfs_read_inode, 573 .dirty_inode = jfs_dirty_inode, 574 .write_inode = jfs_write_inode, 575 .delete_inode = jfs_delete_inode, 576 .put_super = jfs_put_super, 577 .sync_fs = jfs_sync_fs, 578 .write_super_lockfs = jfs_write_super_lockfs, 579 .unlockfs = jfs_unlockfs, 580 .statfs = jfs_statfs, 581 .remount_fs = jfs_remount, 582 }; 583 584 static struct export_operations jfs_export_operations = { 585 .get_parent = jfs_get_parent, 586 }; 587 588 static struct file_system_type jfs_fs_type = { 589 .owner = THIS_MODULE, 590 .name = "jfs", 591 .get_sb = jfs_get_sb, 592 .kill_sb = kill_block_super, 593 .fs_flags = FS_REQUIRES_DEV, 594 }; 595 596 extern int metapage_init(void); 597 extern int txInit(void); 598 extern void txExit(void); 599 extern void metapage_exit(void); 600 601 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags) 602 { 603 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; 604 605 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == 606 SLAB_CTOR_CONSTRUCTOR) { 607 memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); 608 INIT_LIST_HEAD(&jfs_ip->anon_inode_list); 609 init_rwsem(&jfs_ip->rdwrlock); 610 init_MUTEX(&jfs_ip->commit_sem); 611 init_rwsem(&jfs_ip->xattr_sem); 612 spin_lock_init(&jfs_ip->ag_lock); 613 jfs_ip->active_ag = -1; 614 #ifdef CONFIG_JFS_POSIX_ACL 615 jfs_ip->i_acl = JFS_ACL_NOT_CACHED; 616 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; 617 #endif 618 inode_init_once(&jfs_ip->vfs_inode); 619 } 620 } 621 622 static int __init init_jfs_fs(void) 623 { 624 int i; 625 int rc; 626 627 jfs_inode_cachep = 628 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, 629 SLAB_RECLAIM_ACCOUNT, init_once, NULL); 630 if (jfs_inode_cachep == NULL) 631 return -ENOMEM; 632 633 /* 634 * Metapage initialization 635 */ 636 rc = metapage_init(); 637 if (rc) { 638 jfs_err("metapage_init failed w/rc = %d", rc); 639 goto free_slab; 640 } 641 642 /* 643 * Transaction Manager initialization 644 */ 645 rc = txInit(); 646 if (rc) { 647 jfs_err("txInit failed w/rc = %d", rc); 648 goto free_metapage; 649 } 650 651 /* 652 * I/O completion thread (endio) 653 */ 654 jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL); 655 if (jfsIOthread < 0) { 656 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread); 657 goto end_txmngr; 658 } 659 wait_for_completion(&jfsIOwait); /* Wait until thread starts */ 660 661 if (commit_threads < 1) 662 commit_threads = num_online_cpus(); 663 if (commit_threads > MAX_COMMIT_THREADS) 664 commit_threads = MAX_COMMIT_THREADS; 665 666 for (i = 0; i < commit_threads; i++) { 667 jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL, 668 CLONE_KERNEL); 669 if (jfsCommitThread[i] < 0) { 670 jfs_err("init_jfs_fs: fork failed w/rc = %d", 671 jfsCommitThread[i]); 672 commit_threads = i; 673 goto kill_committask; 674 } 675 /* Wait until thread starts */ 676 wait_for_completion(&jfsIOwait); 677 } 678 679 jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL); 680 if (jfsSyncThread < 0) { 681 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread); 682 goto kill_committask; 683 } 684 wait_for_completion(&jfsIOwait); /* Wait until thread starts */ 685 686 #ifdef PROC_FS_JFS 687 jfs_proc_init(); 688 #endif 689 690 return register_filesystem(&jfs_fs_type); 691 692 kill_committask: 693 jfs_stop_threads = 1; 694 wake_up_all(&jfs_commit_thread_wait); 695 for (i = 0; i < commit_threads; i++) 696 wait_for_completion(&jfsIOwait); 697 698 wake_up(&jfs_IO_thread_wait); 699 wait_for_completion(&jfsIOwait); /* Wait for thread exit */ 700 end_txmngr: 701 txExit(); 702 free_metapage: 703 metapage_exit(); 704 free_slab: 705 kmem_cache_destroy(jfs_inode_cachep); 706 return rc; 707 } 708 709 static void __exit exit_jfs_fs(void) 710 { 711 int i; 712 713 jfs_info("exit_jfs_fs called"); 714 715 jfs_stop_threads = 1; 716 txExit(); 717 metapage_exit(); 718 wake_up(&jfs_IO_thread_wait); 719 wait_for_completion(&jfsIOwait); /* Wait until IO thread exits */ 720 wake_up_all(&jfs_commit_thread_wait); 721 for (i = 0; i < commit_threads; i++) 722 wait_for_completion(&jfsIOwait); 723 wake_up(&jfs_sync_thread_wait); 724 wait_for_completion(&jfsIOwait); /* Wait until Sync thread exits */ 725 #ifdef PROC_FS_JFS 726 jfs_proc_clean(); 727 #endif 728 unregister_filesystem(&jfs_fs_type); 729 kmem_cache_destroy(jfs_inode_cachep); 730 } 731 732 module_init(init_jfs_fs) 733 module_exit(exit_jfs_fs) 734