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/mount.h> 27 #include <linux/moduleparam.h> 28 #include <linux/posix_acl.h> 29 #include <asm/uaccess.h> 30 #include <linux/seq_file.h> 31 32 #include "jfs_incore.h" 33 #include "jfs_filsys.h" 34 #include "jfs_inode.h" 35 #include "jfs_metapage.h" 36 #include "jfs_superblock.h" 37 #include "jfs_dmap.h" 38 #include "jfs_imap.h" 39 #include "jfs_acl.h" 40 #include "jfs_debug.h" 41 42 MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); 43 MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); 44 MODULE_LICENSE("GPL"); 45 46 static kmem_cache_t * jfs_inode_cachep; 47 48 static struct super_operations jfs_super_operations; 49 static struct export_operations jfs_export_operations; 50 static struct file_system_type jfs_fs_type; 51 52 #define MAX_COMMIT_THREADS 64 53 static int commit_threads = 0; 54 module_param(commit_threads, int, 0); 55 MODULE_PARM_DESC(commit_threads, "Number of commit threads"); 56 57 int jfs_stop_threads; 58 static pid_t jfsIOthread; 59 static pid_t jfsCommitThread[MAX_COMMIT_THREADS]; 60 static pid_t jfsSyncThread; 61 DECLARE_COMPLETION(jfsIOwait); 62 63 #ifdef CONFIG_JFS_DEBUG 64 int jfsloglevel = JFS_LOGLEVEL_WARN; 65 module_param(jfsloglevel, int, 0644); 66 MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); 67 #endif 68 69 static void jfs_handle_error(struct super_block *sb) 70 { 71 struct jfs_sb_info *sbi = JFS_SBI(sb); 72 73 if (sb->s_flags & MS_RDONLY) 74 return; 75 76 updateSuper(sb, FM_DIRTY); 77 78 if (sbi->flag & JFS_ERR_PANIC) 79 panic("JFS (device %s): panic forced after error\n", 80 sb->s_id); 81 else if (sbi->flag & JFS_ERR_REMOUNT_RO) { 82 jfs_err("ERROR: (device %s): remounting filesystem " 83 "as read-only\n", 84 sb->s_id); 85 sb->s_flags |= MS_RDONLY; 86 } 87 88 /* nothing is done for continue beyond marking the superblock dirty */ 89 } 90 91 void jfs_error(struct super_block *sb, const char * function, ...) 92 { 93 static char error_buf[256]; 94 va_list args; 95 96 va_start(args, function); 97 vsprintf(error_buf, function, args); 98 va_end(args); 99 100 printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf); 101 102 jfs_handle_error(sb); 103 } 104 105 static struct inode *jfs_alloc_inode(struct super_block *sb) 106 { 107 struct jfs_inode_info *jfs_inode; 108 109 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); 110 if (!jfs_inode) 111 return NULL; 112 return &jfs_inode->vfs_inode; 113 } 114 115 static void jfs_destroy_inode(struct inode *inode) 116 { 117 struct jfs_inode_info *ji = JFS_IP(inode); 118 119 BUG_ON(!list_empty(&ji->anon_inode_list)); 120 121 spin_lock_irq(&ji->ag_lock); 122 if (ji->active_ag != -1) { 123 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; 124 atomic_dec(&bmap->db_active[ji->active_ag]); 125 ji->active_ag = -1; 126 } 127 spin_unlock_irq(&ji->ag_lock); 128 129 #ifdef CONFIG_JFS_POSIX_ACL 130 if (ji->i_acl != JFS_ACL_NOT_CACHED) { 131 posix_acl_release(ji->i_acl); 132 ji->i_acl = JFS_ACL_NOT_CACHED; 133 } 134 if (ji->i_default_acl != JFS_ACL_NOT_CACHED) { 135 posix_acl_release(ji->i_default_acl); 136 ji->i_default_acl = JFS_ACL_NOT_CACHED; 137 } 138 #endif 139 140 kmem_cache_free(jfs_inode_cachep, ji); 141 } 142 143 static int jfs_statfs(struct super_block *sb, struct kstatfs *buf) 144 { 145 struct jfs_sb_info *sbi = JFS_SBI(sb); 146 s64 maxinodes; 147 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; 148 149 jfs_info("In jfs_statfs"); 150 buf->f_type = JFS_SUPER_MAGIC; 151 buf->f_bsize = sbi->bsize; 152 buf->f_blocks = sbi->bmap->db_mapsize; 153 buf->f_bfree = sbi->bmap->db_nfree; 154 buf->f_bavail = sbi->bmap->db_nfree; 155 /* 156 * If we really return the number of allocated & free inodes, some 157 * applications will fail because they won't see enough free inodes. 158 * We'll try to calculate some guess as to how may inodes we can 159 * really allocate 160 * 161 * buf->f_files = atomic_read(&imap->im_numinos); 162 * buf->f_ffree = atomic_read(&imap->im_numfree); 163 */ 164 maxinodes = min((s64) atomic_read(&imap->im_numinos) + 165 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) 166 << L2INOSPEREXT), (s64) 0xffffffffLL); 167 buf->f_files = maxinodes; 168 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - 169 atomic_read(&imap->im_numfree)); 170 171 buf->f_namelen = JFS_NAME_MAX; 172 return 0; 173 } 174 175 static void jfs_put_super(struct super_block *sb) 176 { 177 struct jfs_sb_info *sbi = JFS_SBI(sb); 178 int rc; 179 180 jfs_info("In jfs_put_super"); 181 rc = jfs_umount(sb); 182 if (rc) 183 jfs_err("jfs_umount failed with return code %d", rc); 184 if (sbi->nls_tab) 185 unload_nls(sbi->nls_tab); 186 sbi->nls_tab = NULL; 187 188 truncate_inode_pages(sbi->direct_inode->i_mapping, 0); 189 iput(sbi->direct_inode); 190 sbi->direct_inode = NULL; 191 192 kfree(sbi); 193 } 194 195 enum { 196 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, 197 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, 198 Opt_usrquota, Opt_grpquota 199 }; 200 201 static match_table_t tokens = { 202 {Opt_integrity, "integrity"}, 203 {Opt_nointegrity, "nointegrity"}, 204 {Opt_iocharset, "iocharset=%s"}, 205 {Opt_resize, "resize=%u"}, 206 {Opt_resize_nosize, "resize"}, 207 {Opt_errors, "errors=%s"}, 208 {Opt_ignore, "noquota"}, 209 {Opt_ignore, "quota"}, 210 {Opt_usrquota, "usrquota"}, 211 {Opt_grpquota, "grpquota"}, 212 {Opt_err, NULL} 213 }; 214 215 static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, 216 int *flag) 217 { 218 void *nls_map = (void *)-1; /* -1: no change; NULL: none */ 219 char *p; 220 struct jfs_sb_info *sbi = JFS_SBI(sb); 221 222 *newLVSize = 0; 223 224 if (!options) 225 return 1; 226 227 while ((p = strsep(&options, ",")) != NULL) { 228 substring_t args[MAX_OPT_ARGS]; 229 int token; 230 if (!*p) 231 continue; 232 233 token = match_token(p, tokens, args); 234 switch (token) { 235 case Opt_integrity: 236 *flag &= ~JFS_NOINTEGRITY; 237 break; 238 case Opt_nointegrity: 239 *flag |= JFS_NOINTEGRITY; 240 break; 241 case Opt_ignore: 242 /* Silently ignore the quota options */ 243 /* Don't do anything ;-) */ 244 break; 245 case Opt_iocharset: 246 if (nls_map && nls_map != (void *) -1) 247 unload_nls(nls_map); 248 if (!strcmp(args[0].from, "none")) 249 nls_map = NULL; 250 else { 251 nls_map = load_nls(args[0].from); 252 if (!nls_map) { 253 printk(KERN_ERR 254 "JFS: charset not found\n"); 255 goto cleanup; 256 } 257 } 258 break; 259 case Opt_resize: 260 { 261 char *resize = args[0].from; 262 *newLVSize = simple_strtoull(resize, &resize, 0); 263 break; 264 } 265 case Opt_resize_nosize: 266 { 267 *newLVSize = sb->s_bdev->bd_inode->i_size >> 268 sb->s_blocksize_bits; 269 if (*newLVSize == 0) 270 printk(KERN_ERR 271 "JFS: Cannot determine volume size\n"); 272 break; 273 } 274 case Opt_errors: 275 { 276 char *errors = args[0].from; 277 if (!errors || !*errors) 278 goto cleanup; 279 if (!strcmp(errors, "continue")) { 280 *flag &= ~JFS_ERR_REMOUNT_RO; 281 *flag &= ~JFS_ERR_PANIC; 282 *flag |= JFS_ERR_CONTINUE; 283 } else if (!strcmp(errors, "remount-ro")) { 284 *flag &= ~JFS_ERR_CONTINUE; 285 *flag &= ~JFS_ERR_PANIC; 286 *flag |= JFS_ERR_REMOUNT_RO; 287 } else if (!strcmp(errors, "panic")) { 288 *flag &= ~JFS_ERR_CONTINUE; 289 *flag &= ~JFS_ERR_REMOUNT_RO; 290 *flag |= JFS_ERR_PANIC; 291 } else { 292 printk(KERN_ERR 293 "JFS: %s is an invalid error handler\n", 294 errors); 295 goto cleanup; 296 } 297 break; 298 } 299 300 #if defined(CONFIG_QUOTA) 301 case Opt_quota: 302 case Opt_usrquota: 303 *flag |= JFS_USRQUOTA; 304 break; 305 case Opt_grpquota: 306 *flag |= JFS_GRPQUOTA; 307 break; 308 #else 309 case Opt_usrquota: 310 case Opt_grpquota: 311 case Opt_quota: 312 printk(KERN_ERR 313 "JFS: quota operations not supported\n"); 314 break; 315 #endif 316 317 default: 318 printk("jfs: Unrecognized mount option \"%s\" " 319 " or missing value\n", p); 320 goto cleanup; 321 } 322 } 323 324 if (nls_map != (void *) -1) { 325 /* Discard old (if remount) */ 326 if (sbi->nls_tab) 327 unload_nls(sbi->nls_tab); 328 sbi->nls_tab = nls_map; 329 } 330 return 1; 331 332 cleanup: 333 if (nls_map && nls_map != (void *) -1) 334 unload_nls(nls_map); 335 return 0; 336 } 337 338 static int jfs_remount(struct super_block *sb, int *flags, char *data) 339 { 340 s64 newLVSize = 0; 341 int rc = 0; 342 int flag = JFS_SBI(sb)->flag; 343 344 if (!parse_options(data, sb, &newLVSize, &flag)) { 345 return -EINVAL; 346 } 347 if (newLVSize) { 348 if (sb->s_flags & MS_RDONLY) { 349 printk(KERN_ERR 350 "JFS: resize requires volume to be mounted read-write\n"); 351 return -EROFS; 352 } 353 rc = jfs_extendfs(sb, newLVSize, 0); 354 if (rc) 355 return rc; 356 } 357 358 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { 359 /* 360 * Invalidate any previously read metadata. fsck may have 361 * changed the on-disk data since we mounted r/o 362 */ 363 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); 364 365 JFS_SBI(sb)->flag = flag; 366 return jfs_mount_rw(sb, 1); 367 } 368 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { 369 rc = jfs_umount_rw(sb); 370 JFS_SBI(sb)->flag = flag; 371 return rc; 372 } 373 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) 374 if (!(sb->s_flags & MS_RDONLY)) { 375 rc = jfs_umount_rw(sb); 376 if (rc) 377 return rc; 378 JFS_SBI(sb)->flag = flag; 379 return jfs_mount_rw(sb, 1); 380 } 381 JFS_SBI(sb)->flag = flag; 382 383 return 0; 384 } 385 386 static int jfs_fill_super(struct super_block *sb, void *data, int silent) 387 { 388 struct jfs_sb_info *sbi; 389 struct inode *inode; 390 int rc; 391 s64 newLVSize = 0; 392 int flag; 393 394 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); 395 396 if (!new_valid_dev(sb->s_bdev->bd_dev)) 397 return -EOVERFLOW; 398 399 sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); 400 if (!sbi) 401 return -ENOSPC; 402 memset(sbi, 0, sizeof (struct jfs_sb_info)); 403 sb->s_fs_info = sbi; 404 sbi->sb = sb; 405 406 /* initialize the mount flag and determine the default error handler */ 407 flag = JFS_ERR_REMOUNT_RO; 408 409 if (!parse_options((char *) data, sb, &newLVSize, &flag)) { 410 kfree(sbi); 411 return -EINVAL; 412 } 413 sbi->flag = flag; 414 415 #ifdef CONFIG_JFS_POSIX_ACL 416 sb->s_flags |= MS_POSIXACL; 417 #endif 418 419 if (newLVSize) { 420 printk(KERN_ERR "resize option for remount only\n"); 421 return -EINVAL; 422 } 423 424 /* 425 * Initialize blocksize to 4K. 426 */ 427 sb_set_blocksize(sb, PSIZE); 428 429 /* 430 * Set method vectors. 431 */ 432 sb->s_op = &jfs_super_operations; 433 sb->s_export_op = &jfs_export_operations; 434 435 /* 436 * Initialize direct-mapping inode/address-space 437 */ 438 inode = new_inode(sb); 439 if (inode == NULL) 440 goto out_kfree; 441 inode->i_ino = 0; 442 inode->i_nlink = 1; 443 inode->i_size = sb->s_bdev->bd_inode->i_size; 444 inode->i_mapping->a_ops = &jfs_metapage_aops; 445 insert_inode_hash(inode); 446 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); 447 448 sbi->direct_inode = inode; 449 450 rc = jfs_mount(sb); 451 if (rc) { 452 if (!silent) { 453 jfs_err("jfs_mount failed w/return code = %d", rc); 454 } 455 goto out_mount_failed; 456 } 457 if (sb->s_flags & MS_RDONLY) 458 sbi->log = NULL; 459 else { 460 rc = jfs_mount_rw(sb, 0); 461 if (rc) { 462 if (!silent) { 463 jfs_err("jfs_mount_rw failed, return code = %d", 464 rc); 465 } 466 goto out_no_rw; 467 } 468 } 469 470 sb->s_magic = JFS_SUPER_MAGIC; 471 472 inode = iget(sb, ROOT_I); 473 if (!inode || is_bad_inode(inode)) 474 goto out_no_root; 475 sb->s_root = d_alloc_root(inode); 476 if (!sb->s_root) 477 goto out_no_root; 478 479 if (sbi->mntflag & JFS_OS2) 480 sb->s_root->d_op = &jfs_ci_dentry_operations; 481 482 /* logical blocks are represented by 40 bits in pxd_t, etc. */ 483 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; 484 #if BITS_PER_LONG == 32 485 /* 486 * Page cache is indexed by long. 487 * I would use MAX_LFS_FILESIZE, but it's only half as big 488 */ 489 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); 490 #endif 491 sb->s_time_gran = 1; 492 return 0; 493 494 out_no_root: 495 jfs_err("jfs_read_super: get root inode failed"); 496 if (inode) 497 iput(inode); 498 499 out_no_rw: 500 rc = jfs_umount(sb); 501 if (rc) { 502 jfs_err("jfs_umount failed with return code %d", rc); 503 } 504 out_mount_failed: 505 filemap_fdatawrite(sbi->direct_inode->i_mapping); 506 filemap_fdatawait(sbi->direct_inode->i_mapping); 507 truncate_inode_pages(sbi->direct_inode->i_mapping, 0); 508 make_bad_inode(sbi->direct_inode); 509 iput(sbi->direct_inode); 510 sbi->direct_inode = NULL; 511 out_kfree: 512 if (sbi->nls_tab) 513 unload_nls(sbi->nls_tab); 514 kfree(sbi); 515 return -EINVAL; 516 } 517 518 static void jfs_write_super_lockfs(struct super_block *sb) 519 { 520 struct jfs_sb_info *sbi = JFS_SBI(sb); 521 struct jfs_log *log = sbi->log; 522 523 if (!(sb->s_flags & MS_RDONLY)) { 524 txQuiesce(sb); 525 lmLogShutdown(log); 526 updateSuper(sb, FM_CLEAN); 527 } 528 } 529 530 static void jfs_unlockfs(struct super_block *sb) 531 { 532 struct jfs_sb_info *sbi = JFS_SBI(sb); 533 struct jfs_log *log = sbi->log; 534 int rc = 0; 535 536 if (!(sb->s_flags & MS_RDONLY)) { 537 updateSuper(sb, FM_MOUNT); 538 if ((rc = lmLogInit(log))) 539 jfs_err("jfs_unlock failed with return code %d", rc); 540 else 541 txResume(sb); 542 } 543 } 544 545 static struct super_block *jfs_get_sb(struct file_system_type *fs_type, 546 int flags, const char *dev_name, void *data) 547 { 548 return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super); 549 } 550 551 static int jfs_sync_fs(struct super_block *sb, int wait) 552 { 553 struct jfs_log *log = JFS_SBI(sb)->log; 554 555 /* log == NULL indicates read-only mount */ 556 if (log) { 557 jfs_flush_journal(log, wait); 558 jfs_syncpt(log, 0); 559 } 560 561 return 0; 562 } 563 564 static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) 565 { 566 struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); 567 568 if (sbi->flag & JFS_NOINTEGRITY) 569 seq_puts(seq, ",nointegrity"); 570 else 571 seq_puts(seq, ",integrity"); 572 573 #if defined(CONFIG_QUOTA) 574 if (sbi->flag & JFS_USRQUOTA) 575 seq_puts(seq, ",usrquota"); 576 577 if (sbi->flag & JFS_GRPQUOTA) 578 seq_puts(seq, ",grpquota"); 579 #endif 580 581 return 0; 582 } 583 584 static struct super_operations jfs_super_operations = { 585 .alloc_inode = jfs_alloc_inode, 586 .destroy_inode = jfs_destroy_inode, 587 .read_inode = jfs_read_inode, 588 .dirty_inode = jfs_dirty_inode, 589 .write_inode = jfs_write_inode, 590 .delete_inode = jfs_delete_inode, 591 .put_super = jfs_put_super, 592 .sync_fs = jfs_sync_fs, 593 .write_super_lockfs = jfs_write_super_lockfs, 594 .unlockfs = jfs_unlockfs, 595 .statfs = jfs_statfs, 596 .remount_fs = jfs_remount, 597 .show_options = jfs_show_options 598 }; 599 600 static struct export_operations jfs_export_operations = { 601 .get_parent = jfs_get_parent, 602 }; 603 604 static struct file_system_type jfs_fs_type = { 605 .owner = THIS_MODULE, 606 .name = "jfs", 607 .get_sb = jfs_get_sb, 608 .kill_sb = kill_block_super, 609 .fs_flags = FS_REQUIRES_DEV, 610 }; 611 612 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags) 613 { 614 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; 615 616 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == 617 SLAB_CTOR_CONSTRUCTOR) { 618 memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); 619 INIT_LIST_HEAD(&jfs_ip->anon_inode_list); 620 init_rwsem(&jfs_ip->rdwrlock); 621 init_MUTEX(&jfs_ip->commit_sem); 622 init_rwsem(&jfs_ip->xattr_sem); 623 spin_lock_init(&jfs_ip->ag_lock); 624 jfs_ip->active_ag = -1; 625 #ifdef CONFIG_JFS_POSIX_ACL 626 jfs_ip->i_acl = JFS_ACL_NOT_CACHED; 627 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; 628 #endif 629 inode_init_once(&jfs_ip->vfs_inode); 630 } 631 } 632 633 static int __init init_jfs_fs(void) 634 { 635 int i; 636 int rc; 637 638 jfs_inode_cachep = 639 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, 640 SLAB_RECLAIM_ACCOUNT, init_once, NULL); 641 if (jfs_inode_cachep == NULL) 642 return -ENOMEM; 643 644 /* 645 * Metapage initialization 646 */ 647 rc = metapage_init(); 648 if (rc) { 649 jfs_err("metapage_init failed w/rc = %d", rc); 650 goto free_slab; 651 } 652 653 /* 654 * Transaction Manager initialization 655 */ 656 rc = txInit(); 657 if (rc) { 658 jfs_err("txInit failed w/rc = %d", rc); 659 goto free_metapage; 660 } 661 662 /* 663 * I/O completion thread (endio) 664 */ 665 jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL); 666 if (jfsIOthread < 0) { 667 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread); 668 goto end_txmngr; 669 } 670 wait_for_completion(&jfsIOwait); /* Wait until thread starts */ 671 672 if (commit_threads < 1) 673 commit_threads = num_online_cpus(); 674 if (commit_threads > MAX_COMMIT_THREADS) 675 commit_threads = MAX_COMMIT_THREADS; 676 677 for (i = 0; i < commit_threads; i++) { 678 jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL, 679 CLONE_KERNEL); 680 if (jfsCommitThread[i] < 0) { 681 jfs_err("init_jfs_fs: fork failed w/rc = %d", 682 jfsCommitThread[i]); 683 commit_threads = i; 684 goto kill_committask; 685 } 686 /* Wait until thread starts */ 687 wait_for_completion(&jfsIOwait); 688 } 689 690 jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL); 691 if (jfsSyncThread < 0) { 692 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread); 693 goto kill_committask; 694 } 695 wait_for_completion(&jfsIOwait); /* Wait until thread starts */ 696 697 #ifdef PROC_FS_JFS 698 jfs_proc_init(); 699 #endif 700 701 return register_filesystem(&jfs_fs_type); 702 703 kill_committask: 704 jfs_stop_threads = 1; 705 wake_up_all(&jfs_commit_thread_wait); 706 for (i = 0; i < commit_threads; i++) 707 wait_for_completion(&jfsIOwait); 708 709 wake_up(&jfs_IO_thread_wait); 710 wait_for_completion(&jfsIOwait); /* Wait for thread exit */ 711 end_txmngr: 712 txExit(); 713 free_metapage: 714 metapage_exit(); 715 free_slab: 716 kmem_cache_destroy(jfs_inode_cachep); 717 return rc; 718 } 719 720 static void __exit exit_jfs_fs(void) 721 { 722 int i; 723 724 jfs_info("exit_jfs_fs called"); 725 726 jfs_stop_threads = 1; 727 txExit(); 728 metapage_exit(); 729 wake_up(&jfs_IO_thread_wait); 730 wait_for_completion(&jfsIOwait); /* Wait until IO thread exits */ 731 wake_up_all(&jfs_commit_thread_wait); 732 for (i = 0; i < commit_threads; i++) 733 wait_for_completion(&jfsIOwait); 734 wake_up(&jfs_sync_thread_wait); 735 wait_for_completion(&jfsIOwait); /* Wait until Sync thread exits */ 736 #ifdef PROC_FS_JFS 737 jfs_proc_clean(); 738 #endif 739 unregister_filesystem(&jfs_fs_type); 740 kmem_cache_destroy(jfs_inode_cachep); 741 } 742 743 module_init(init_jfs_fs) 744 module_exit(exit_jfs_fs) 745