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/module.h> 22 #include <linux/parser.h> 23 #include <linux/completion.h> 24 #include <linux/vfs.h> 25 #include <linux/mount.h> 26 #include <linux/moduleparam.h> 27 #include <linux/kthread.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 static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS]; 58 struct task_struct *jfsIOthread; 59 struct task_struct *jfsSyncThread; 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 BUG_ON(!list_empty(&ji->anon_inode_list)); 118 119 spin_lock_irq(&ji->ag_lock); 120 if (ji->active_ag != -1) { 121 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; 122 atomic_dec(&bmap->db_active[ji->active_ag]); 123 ji->active_ag = -1; 124 } 125 spin_unlock_irq(&ji->ag_lock); 126 127 #ifdef CONFIG_JFS_POSIX_ACL 128 if (ji->i_acl != JFS_ACL_NOT_CACHED) { 129 posix_acl_release(ji->i_acl); 130 ji->i_acl = JFS_ACL_NOT_CACHED; 131 } 132 if (ji->i_default_acl != JFS_ACL_NOT_CACHED) { 133 posix_acl_release(ji->i_default_acl); 134 ji->i_default_acl = JFS_ACL_NOT_CACHED; 135 } 136 #endif 137 138 kmem_cache_free(jfs_inode_cachep, ji); 139 } 140 141 static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) 142 { 143 struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); 144 s64 maxinodes; 145 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; 146 147 jfs_info("In jfs_statfs"); 148 buf->f_type = JFS_SUPER_MAGIC; 149 buf->f_bsize = sbi->bsize; 150 buf->f_blocks = sbi->bmap->db_mapsize; 151 buf->f_bfree = sbi->bmap->db_nfree; 152 buf->f_bavail = sbi->bmap->db_nfree; 153 /* 154 * If we really return the number of allocated & free inodes, some 155 * applications will fail because they won't see enough free inodes. 156 * We'll try to calculate some guess as to how may inodes we can 157 * really allocate 158 * 159 * buf->f_files = atomic_read(&imap->im_numinos); 160 * buf->f_ffree = atomic_read(&imap->im_numfree); 161 */ 162 maxinodes = min((s64) atomic_read(&imap->im_numinos) + 163 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) 164 << L2INOSPEREXT), (s64) 0xffffffffLL); 165 buf->f_files = maxinodes; 166 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - 167 atomic_read(&imap->im_numfree)); 168 169 buf->f_namelen = JFS_NAME_MAX; 170 return 0; 171 } 172 173 static void jfs_put_super(struct super_block *sb) 174 { 175 struct jfs_sb_info *sbi = JFS_SBI(sb); 176 int rc; 177 178 jfs_info("In jfs_put_super"); 179 rc = jfs_umount(sb); 180 if (rc) 181 jfs_err("jfs_umount failed with return code %d", rc); 182 if (sbi->nls_tab) 183 unload_nls(sbi->nls_tab); 184 sbi->nls_tab = NULL; 185 186 truncate_inode_pages(sbi->direct_inode->i_mapping, 0); 187 iput(sbi->direct_inode); 188 sbi->direct_inode = NULL; 189 190 kfree(sbi); 191 } 192 193 enum { 194 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, 195 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, 196 Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask 197 }; 198 199 static match_table_t tokens = { 200 {Opt_integrity, "integrity"}, 201 {Opt_nointegrity, "nointegrity"}, 202 {Opt_iocharset, "iocharset=%s"}, 203 {Opt_resize, "resize=%u"}, 204 {Opt_resize_nosize, "resize"}, 205 {Opt_errors, "errors=%s"}, 206 {Opt_ignore, "noquota"}, 207 {Opt_ignore, "quota"}, 208 {Opt_usrquota, "usrquota"}, 209 {Opt_grpquota, "grpquota"}, 210 {Opt_uid, "uid=%u"}, 211 {Opt_gid, "gid=%u"}, 212 {Opt_umask, "umask=%u"}, 213 {Opt_err, NULL} 214 }; 215 216 static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, 217 int *flag) 218 { 219 void *nls_map = (void *)-1; /* -1: no change; NULL: none */ 220 char *p; 221 struct jfs_sb_info *sbi = JFS_SBI(sb); 222 223 *newLVSize = 0; 224 225 if (!options) 226 return 1; 227 228 while ((p = strsep(&options, ",")) != NULL) { 229 substring_t args[MAX_OPT_ARGS]; 230 int token; 231 if (!*p) 232 continue; 233 234 token = match_token(p, tokens, args); 235 switch (token) { 236 case Opt_integrity: 237 *flag &= ~JFS_NOINTEGRITY; 238 break; 239 case Opt_nointegrity: 240 *flag |= JFS_NOINTEGRITY; 241 break; 242 case Opt_ignore: 243 /* Silently ignore the quota options */ 244 /* Don't do anything ;-) */ 245 break; 246 case Opt_iocharset: 247 if (nls_map && nls_map != (void *) -1) 248 unload_nls(nls_map); 249 if (!strcmp(args[0].from, "none")) 250 nls_map = NULL; 251 else { 252 nls_map = load_nls(args[0].from); 253 if (!nls_map) { 254 printk(KERN_ERR 255 "JFS: charset not found\n"); 256 goto cleanup; 257 } 258 } 259 break; 260 case Opt_resize: 261 { 262 char *resize = args[0].from; 263 *newLVSize = simple_strtoull(resize, &resize, 0); 264 break; 265 } 266 case Opt_resize_nosize: 267 { 268 *newLVSize = sb->s_bdev->bd_inode->i_size >> 269 sb->s_blocksize_bits; 270 if (*newLVSize == 0) 271 printk(KERN_ERR 272 "JFS: Cannot determine volume size\n"); 273 break; 274 } 275 case Opt_errors: 276 { 277 char *errors = args[0].from; 278 if (!errors || !*errors) 279 goto cleanup; 280 if (!strcmp(errors, "continue")) { 281 *flag &= ~JFS_ERR_REMOUNT_RO; 282 *flag &= ~JFS_ERR_PANIC; 283 *flag |= JFS_ERR_CONTINUE; 284 } else if (!strcmp(errors, "remount-ro")) { 285 *flag &= ~JFS_ERR_CONTINUE; 286 *flag &= ~JFS_ERR_PANIC; 287 *flag |= JFS_ERR_REMOUNT_RO; 288 } else if (!strcmp(errors, "panic")) { 289 *flag &= ~JFS_ERR_CONTINUE; 290 *flag &= ~JFS_ERR_REMOUNT_RO; 291 *flag |= JFS_ERR_PANIC; 292 } else { 293 printk(KERN_ERR 294 "JFS: %s is an invalid error handler\n", 295 errors); 296 goto cleanup; 297 } 298 break; 299 } 300 301 #if defined(CONFIG_QUOTA) 302 case Opt_quota: 303 case Opt_usrquota: 304 *flag |= JFS_USRQUOTA; 305 break; 306 case Opt_grpquota: 307 *flag |= JFS_GRPQUOTA; 308 break; 309 #else 310 case Opt_usrquota: 311 case Opt_grpquota: 312 case Opt_quota: 313 printk(KERN_ERR 314 "JFS: quota operations not supported\n"); 315 break; 316 #endif 317 case Opt_uid: 318 { 319 char *uid = args[0].from; 320 sbi->uid = simple_strtoul(uid, &uid, 0); 321 break; 322 } 323 case Opt_gid: 324 { 325 char *gid = args[0].from; 326 sbi->gid = simple_strtoul(gid, &gid, 0); 327 break; 328 } 329 case Opt_umask: 330 { 331 char *umask = args[0].from; 332 sbi->umask = simple_strtoul(umask, &umask, 8); 333 if (sbi->umask & ~0777) { 334 printk(KERN_ERR 335 "JFS: Invalid value of umask\n"); 336 goto cleanup; 337 } 338 break; 339 } 340 default: 341 printk("jfs: Unrecognized mount option \"%s\" " 342 " or missing value\n", p); 343 goto cleanup; 344 } 345 } 346 347 if (nls_map != (void *) -1) { 348 /* Discard old (if remount) */ 349 if (sbi->nls_tab) 350 unload_nls(sbi->nls_tab); 351 sbi->nls_tab = nls_map; 352 } 353 return 1; 354 355 cleanup: 356 if (nls_map && nls_map != (void *) -1) 357 unload_nls(nls_map); 358 return 0; 359 } 360 361 static int jfs_remount(struct super_block *sb, int *flags, char *data) 362 { 363 s64 newLVSize = 0; 364 int rc = 0; 365 int flag = JFS_SBI(sb)->flag; 366 367 if (!parse_options(data, sb, &newLVSize, &flag)) { 368 return -EINVAL; 369 } 370 if (newLVSize) { 371 if (sb->s_flags & MS_RDONLY) { 372 printk(KERN_ERR 373 "JFS: resize requires volume to be mounted read-write\n"); 374 return -EROFS; 375 } 376 rc = jfs_extendfs(sb, newLVSize, 0); 377 if (rc) 378 return rc; 379 } 380 381 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { 382 /* 383 * Invalidate any previously read metadata. fsck may have 384 * changed the on-disk data since we mounted r/o 385 */ 386 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); 387 388 JFS_SBI(sb)->flag = flag; 389 return jfs_mount_rw(sb, 1); 390 } 391 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { 392 rc = jfs_umount_rw(sb); 393 JFS_SBI(sb)->flag = flag; 394 return rc; 395 } 396 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) 397 if (!(sb->s_flags & MS_RDONLY)) { 398 rc = jfs_umount_rw(sb); 399 if (rc) 400 return rc; 401 JFS_SBI(sb)->flag = flag; 402 return jfs_mount_rw(sb, 1); 403 } 404 JFS_SBI(sb)->flag = flag; 405 406 return 0; 407 } 408 409 static int jfs_fill_super(struct super_block *sb, void *data, int silent) 410 { 411 struct jfs_sb_info *sbi; 412 struct inode *inode; 413 int rc; 414 s64 newLVSize = 0; 415 int flag; 416 417 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); 418 419 if (!new_valid_dev(sb->s_bdev->bd_dev)) 420 return -EOVERFLOW; 421 422 sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); 423 if (!sbi) 424 return -ENOSPC; 425 sb->s_fs_info = sbi; 426 sbi->sb = sb; 427 sbi->uid = sbi->gid = sbi->umask = -1; 428 429 /* initialize the mount flag and determine the default error handler */ 430 flag = JFS_ERR_REMOUNT_RO; 431 432 if (!parse_options((char *) data, sb, &newLVSize, &flag)) { 433 kfree(sbi); 434 return -EINVAL; 435 } 436 sbi->flag = flag; 437 438 #ifdef CONFIG_JFS_POSIX_ACL 439 sb->s_flags |= MS_POSIXACL; 440 #endif 441 442 if (newLVSize) { 443 printk(KERN_ERR "resize option for remount only\n"); 444 return -EINVAL; 445 } 446 447 /* 448 * Initialize blocksize to 4K. 449 */ 450 sb_set_blocksize(sb, PSIZE); 451 452 /* 453 * Set method vectors. 454 */ 455 sb->s_op = &jfs_super_operations; 456 sb->s_export_op = &jfs_export_operations; 457 458 /* 459 * Initialize direct-mapping inode/address-space 460 */ 461 inode = new_inode(sb); 462 if (inode == NULL) 463 goto out_kfree; 464 inode->i_ino = 0; 465 inode->i_nlink = 1; 466 inode->i_size = sb->s_bdev->bd_inode->i_size; 467 inode->i_mapping->a_ops = &jfs_metapage_aops; 468 insert_inode_hash(inode); 469 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); 470 471 sbi->direct_inode = inode; 472 473 rc = jfs_mount(sb); 474 if (rc) { 475 if (!silent) { 476 jfs_err("jfs_mount failed w/return code = %d", rc); 477 } 478 goto out_mount_failed; 479 } 480 if (sb->s_flags & MS_RDONLY) 481 sbi->log = NULL; 482 else { 483 rc = jfs_mount_rw(sb, 0); 484 if (rc) { 485 if (!silent) { 486 jfs_err("jfs_mount_rw failed, return code = %d", 487 rc); 488 } 489 goto out_no_rw; 490 } 491 } 492 493 sb->s_magic = JFS_SUPER_MAGIC; 494 495 inode = iget(sb, ROOT_I); 496 if (!inode || is_bad_inode(inode)) 497 goto out_no_root; 498 sb->s_root = d_alloc_root(inode); 499 if (!sb->s_root) 500 goto out_no_root; 501 502 if (sbi->mntflag & JFS_OS2) 503 sb->s_root->d_op = &jfs_ci_dentry_operations; 504 505 /* logical blocks are represented by 40 bits in pxd_t, etc. */ 506 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; 507 #if BITS_PER_LONG == 32 508 /* 509 * Page cache is indexed by long. 510 * I would use MAX_LFS_FILESIZE, but it's only half as big 511 */ 512 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); 513 #endif 514 sb->s_time_gran = 1; 515 return 0; 516 517 out_no_root: 518 jfs_err("jfs_read_super: get root inode failed"); 519 if (inode) 520 iput(inode); 521 522 out_no_rw: 523 rc = jfs_umount(sb); 524 if (rc) { 525 jfs_err("jfs_umount failed with return code %d", rc); 526 } 527 out_mount_failed: 528 filemap_write_and_wait(sbi->direct_inode->i_mapping); 529 truncate_inode_pages(sbi->direct_inode->i_mapping, 0); 530 make_bad_inode(sbi->direct_inode); 531 iput(sbi->direct_inode); 532 sbi->direct_inode = NULL; 533 out_kfree: 534 if (sbi->nls_tab) 535 unload_nls(sbi->nls_tab); 536 kfree(sbi); 537 return -EINVAL; 538 } 539 540 static void jfs_write_super_lockfs(struct super_block *sb) 541 { 542 struct jfs_sb_info *sbi = JFS_SBI(sb); 543 struct jfs_log *log = sbi->log; 544 545 if (!(sb->s_flags & MS_RDONLY)) { 546 txQuiesce(sb); 547 lmLogShutdown(log); 548 updateSuper(sb, FM_CLEAN); 549 } 550 } 551 552 static void jfs_unlockfs(struct super_block *sb) 553 { 554 struct jfs_sb_info *sbi = JFS_SBI(sb); 555 struct jfs_log *log = sbi->log; 556 int rc = 0; 557 558 if (!(sb->s_flags & MS_RDONLY)) { 559 updateSuper(sb, FM_MOUNT); 560 if ((rc = lmLogInit(log))) 561 jfs_err("jfs_unlock failed with return code %d", rc); 562 else 563 txResume(sb); 564 } 565 } 566 567 static int jfs_get_sb(struct file_system_type *fs_type, 568 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 569 { 570 return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super, 571 mnt); 572 } 573 574 static int jfs_sync_fs(struct super_block *sb, int wait) 575 { 576 struct jfs_log *log = JFS_SBI(sb)->log; 577 578 /* log == NULL indicates read-only mount */ 579 if (log) { 580 jfs_flush_journal(log, wait); 581 jfs_syncpt(log, 0); 582 } 583 584 return 0; 585 } 586 587 static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) 588 { 589 struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); 590 591 if (sbi->uid != -1) 592 seq_printf(seq, ",uid=%d", sbi->uid); 593 if (sbi->gid != -1) 594 seq_printf(seq, ",gid=%d", sbi->gid); 595 if (sbi->umask != -1) 596 seq_printf(seq, ",umask=%03o", sbi->umask); 597 if (sbi->flag & JFS_NOINTEGRITY) 598 seq_puts(seq, ",nointegrity"); 599 600 #if defined(CONFIG_QUOTA) 601 if (sbi->flag & JFS_USRQUOTA) 602 seq_puts(seq, ",usrquota"); 603 604 if (sbi->flag & JFS_GRPQUOTA) 605 seq_puts(seq, ",grpquota"); 606 #endif 607 608 return 0; 609 } 610 611 static struct super_operations jfs_super_operations = { 612 .alloc_inode = jfs_alloc_inode, 613 .destroy_inode = jfs_destroy_inode, 614 .read_inode = jfs_read_inode, 615 .dirty_inode = jfs_dirty_inode, 616 .write_inode = jfs_write_inode, 617 .delete_inode = jfs_delete_inode, 618 .put_super = jfs_put_super, 619 .sync_fs = jfs_sync_fs, 620 .write_super_lockfs = jfs_write_super_lockfs, 621 .unlockfs = jfs_unlockfs, 622 .statfs = jfs_statfs, 623 .remount_fs = jfs_remount, 624 .show_options = jfs_show_options 625 }; 626 627 static struct export_operations jfs_export_operations = { 628 .get_parent = jfs_get_parent, 629 }; 630 631 static struct file_system_type jfs_fs_type = { 632 .owner = THIS_MODULE, 633 .name = "jfs", 634 .get_sb = jfs_get_sb, 635 .kill_sb = kill_block_super, 636 .fs_flags = FS_REQUIRES_DEV, 637 }; 638 639 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags) 640 { 641 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; 642 643 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == 644 SLAB_CTOR_CONSTRUCTOR) { 645 memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); 646 INIT_LIST_HEAD(&jfs_ip->anon_inode_list); 647 init_rwsem(&jfs_ip->rdwrlock); 648 mutex_init(&jfs_ip->commit_mutex); 649 init_rwsem(&jfs_ip->xattr_sem); 650 spin_lock_init(&jfs_ip->ag_lock); 651 jfs_ip->active_ag = -1; 652 #ifdef CONFIG_JFS_POSIX_ACL 653 jfs_ip->i_acl = JFS_ACL_NOT_CACHED; 654 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; 655 #endif 656 inode_init_once(&jfs_ip->vfs_inode); 657 } 658 } 659 660 static int __init init_jfs_fs(void) 661 { 662 int i; 663 int rc; 664 665 jfs_inode_cachep = 666 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, 667 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, 668 init_once, NULL); 669 if (jfs_inode_cachep == NULL) 670 return -ENOMEM; 671 672 /* 673 * Metapage initialization 674 */ 675 rc = metapage_init(); 676 if (rc) { 677 jfs_err("metapage_init failed w/rc = %d", rc); 678 goto free_slab; 679 } 680 681 /* 682 * Transaction Manager initialization 683 */ 684 rc = txInit(); 685 if (rc) { 686 jfs_err("txInit failed w/rc = %d", rc); 687 goto free_metapage; 688 } 689 690 /* 691 * I/O completion thread (endio) 692 */ 693 jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); 694 if (IS_ERR(jfsIOthread)) { 695 rc = PTR_ERR(jfsIOthread); 696 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); 697 goto end_txmngr; 698 } 699 700 if (commit_threads < 1) 701 commit_threads = num_online_cpus(); 702 if (commit_threads > MAX_COMMIT_THREADS) 703 commit_threads = MAX_COMMIT_THREADS; 704 705 for (i = 0; i < commit_threads; i++) { 706 jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); 707 if (IS_ERR(jfsCommitThread[i])) { 708 rc = PTR_ERR(jfsCommitThread[i]); 709 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); 710 commit_threads = i; 711 goto kill_committask; 712 } 713 } 714 715 jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); 716 if (IS_ERR(jfsSyncThread)) { 717 rc = PTR_ERR(jfsSyncThread); 718 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); 719 goto kill_committask; 720 } 721 722 #ifdef PROC_FS_JFS 723 jfs_proc_init(); 724 #endif 725 726 return register_filesystem(&jfs_fs_type); 727 728 kill_committask: 729 for (i = 0; i < commit_threads; i++) 730 kthread_stop(jfsCommitThread[i]); 731 kthread_stop(jfsIOthread); 732 end_txmngr: 733 txExit(); 734 free_metapage: 735 metapage_exit(); 736 free_slab: 737 kmem_cache_destroy(jfs_inode_cachep); 738 return rc; 739 } 740 741 static void __exit exit_jfs_fs(void) 742 { 743 int i; 744 745 jfs_info("exit_jfs_fs called"); 746 747 txExit(); 748 metapage_exit(); 749 750 kthread_stop(jfsIOthread); 751 for (i = 0; i < commit_threads; i++) 752 kthread_stop(jfsCommitThread[i]); 753 kthread_stop(jfsSyncThread); 754 #ifdef PROC_FS_JFS 755 jfs_proc_clean(); 756 #endif 757 unregister_filesystem(&jfs_fs_type); 758 kmem_cache_destroy(jfs_inode_cachep); 759 } 760 761 module_init(init_jfs_fs) 762 module_exit(exit_jfs_fs) 763