2 * Copyright (C) International Business Machines Corp., 2000-2004
3 * Portions Copyright (C) Christoph Hellwig, 2001-2002
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.
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.
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
21 #include <linux/module.h>
22 #include <linux/parser.h>
23 #include <linux/completion.h>
24 #include <linux/vfs.h>
25 #include <linux/quotaops.h>
26 #include <linux/mount.h>
27 #include <linux/moduleparam.h>
28 #include <linux/kthread.h>
29 #include <linux/posix_acl.h>
30 #include <linux/buffer_head.h>
31 #include <linux/exportfs.h>
32 #include <linux/crc32.h>
33 #include <linux/slab.h>
34 #include <asm/uaccess.h>
35 #include <linux/seq_file.h>
36 #include <linux/blkdev.h>
38 #include "jfs_incore.h"
39 #include "jfs_filsys.h"
40 #include "jfs_inode.h"
41 #include "jfs_metapage.h"
42 #include "jfs_superblock.h"
46 #include "jfs_debug.h"
48 MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
49 MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
50 MODULE_LICENSE("GPL");
52 static struct kmem_cache * jfs_inode_cachep;
54 static const struct super_operations jfs_super_operations;
55 static const struct export_operations jfs_export_operations;
56 static struct file_system_type jfs_fs_type;
58 #define MAX_COMMIT_THREADS 64
59 static int commit_threads = 0;
60 module_param(commit_threads, int, 0);
61 MODULE_PARM_DESC(commit_threads, "Number of commit threads");
63 static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
64 struct task_struct *jfsIOthread;
65 struct task_struct *jfsSyncThread;
67 #ifdef CONFIG_JFS_DEBUG
68 int jfsloglevel = JFS_LOGLEVEL_WARN;
69 module_param(jfsloglevel, int, 0644);
70 MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
73 static void jfs_handle_error(struct super_block *sb)
75 struct jfs_sb_info *sbi = JFS_SBI(sb);
77 if (sb->s_flags & MS_RDONLY)
80 updateSuper(sb, FM_DIRTY);
82 if (sbi->flag & JFS_ERR_PANIC)
83 panic("JFS (device %s): panic forced after error\n",
85 else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
86 jfs_err("ERROR: (device %s): remounting filesystem "
89 sb->s_flags |= MS_RDONLY;
92 /* nothing is done for continue beyond marking the superblock dirty */
95 void jfs_error(struct super_block *sb, const char *fmt, ...)
105 pr_err("ERROR: (device %s): %pf: %pV\n",
106 sb->s_id, __builtin_return_address(0), &vaf);
110 jfs_handle_error(sb);
113 static struct inode *jfs_alloc_inode(struct super_block *sb)
115 struct jfs_inode_info *jfs_inode;
117 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
120 return &jfs_inode->vfs_inode;
123 static void jfs_i_callback(struct rcu_head *head)
125 struct inode *inode = container_of(head, struct inode, i_rcu);
126 struct jfs_inode_info *ji = JFS_IP(inode);
127 kmem_cache_free(jfs_inode_cachep, ji);
130 static void jfs_destroy_inode(struct inode *inode)
132 struct jfs_inode_info *ji = JFS_IP(inode);
134 BUG_ON(!list_empty(&ji->anon_inode_list));
136 spin_lock_irq(&ji->ag_lock);
137 if (ji->active_ag != -1) {
138 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
139 atomic_dec(&bmap->db_active[ji->active_ag]);
142 spin_unlock_irq(&ji->ag_lock);
143 call_rcu(&inode->i_rcu, jfs_i_callback);
146 static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
148 struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
150 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
152 jfs_info("In jfs_statfs");
153 buf->f_type = JFS_SUPER_MAGIC;
154 buf->f_bsize = sbi->bsize;
155 buf->f_blocks = sbi->bmap->db_mapsize;
156 buf->f_bfree = sbi->bmap->db_nfree;
157 buf->f_bavail = sbi->bmap->db_nfree;
159 * If we really return the number of allocated & free inodes, some
160 * applications will fail because they won't see enough free inodes.
161 * We'll try to calculate some guess as to how many inodes we can
164 * buf->f_files = atomic_read(&imap->im_numinos);
165 * buf->f_ffree = atomic_read(&imap->im_numfree);
167 maxinodes = min((s64) atomic_read(&imap->im_numinos) +
168 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
169 << L2INOSPEREXT), (s64) 0xffffffffLL);
170 buf->f_files = maxinodes;
171 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
172 atomic_read(&imap->im_numfree));
173 buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
174 buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
175 sizeof(sbi->uuid)/2);
177 buf->f_namelen = JFS_NAME_MAX;
181 static void jfs_put_super(struct super_block *sb)
183 struct jfs_sb_info *sbi = JFS_SBI(sb);
186 jfs_info("In jfs_put_super");
188 dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
192 jfs_err("jfs_umount failed with return code %d", rc);
194 unload_nls(sbi->nls_tab);
196 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
197 iput(sbi->direct_inode);
203 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
204 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
205 Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask,
206 Opt_discard, Opt_nodiscard, Opt_discard_minblk
209 static const match_table_t tokens = {
210 {Opt_integrity, "integrity"},
211 {Opt_nointegrity, "nointegrity"},
212 {Opt_iocharset, "iocharset=%s"},
213 {Opt_resize, "resize=%u"},
214 {Opt_resize_nosize, "resize"},
215 {Opt_errors, "errors=%s"},
216 {Opt_ignore, "noquota"},
217 {Opt_ignore, "quota"},
218 {Opt_usrquota, "usrquota"},
219 {Opt_grpquota, "grpquota"},
222 {Opt_umask, "umask=%u"},
223 {Opt_discard, "discard"},
224 {Opt_nodiscard, "nodiscard"},
225 {Opt_discard_minblk, "discard=%u"},
229 static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
232 void *nls_map = (void *)-1; /* -1: no change; NULL: none */
234 struct jfs_sb_info *sbi = JFS_SBI(sb);
241 while ((p = strsep(&options, ",")) != NULL) {
242 substring_t args[MAX_OPT_ARGS];
247 token = match_token(p, tokens, args);
250 *flag &= ~JFS_NOINTEGRITY;
252 case Opt_nointegrity:
253 *flag |= JFS_NOINTEGRITY;
256 /* Silently ignore the quota options */
257 /* Don't do anything ;-) */
260 if (nls_map && nls_map != (void *) -1)
262 if (!strcmp(args[0].from, "none"))
265 nls_map = load_nls(args[0].from);
267 pr_err("JFS: charset not found\n");
274 char *resize = args[0].from;
275 *newLVSize = simple_strtoull(resize, &resize, 0);
278 case Opt_resize_nosize:
280 *newLVSize = sb->s_bdev->bd_inode->i_size >>
281 sb->s_blocksize_bits;
283 pr_err("JFS: Cannot determine volume size\n");
288 char *errors = args[0].from;
289 if (!errors || !*errors)
291 if (!strcmp(errors, "continue")) {
292 *flag &= ~JFS_ERR_REMOUNT_RO;
293 *flag &= ~JFS_ERR_PANIC;
294 *flag |= JFS_ERR_CONTINUE;
295 } else if (!strcmp(errors, "remount-ro")) {
296 *flag &= ~JFS_ERR_CONTINUE;
297 *flag &= ~JFS_ERR_PANIC;
298 *flag |= JFS_ERR_REMOUNT_RO;
299 } else if (!strcmp(errors, "panic")) {
300 *flag &= ~JFS_ERR_CONTINUE;
301 *flag &= ~JFS_ERR_REMOUNT_RO;
302 *flag |= JFS_ERR_PANIC;
304 pr_err("JFS: %s is an invalid error handler\n",
314 *flag |= JFS_USRQUOTA;
317 *flag |= JFS_GRPQUOTA;
323 pr_err("JFS: quota operations not supported\n");
328 char *uid = args[0].from;
329 uid_t val = simple_strtoul(uid, &uid, 0);
330 sbi->uid = make_kuid(current_user_ns(), val);
331 if (!uid_valid(sbi->uid))
338 char *gid = args[0].from;
339 gid_t val = simple_strtoul(gid, &gid, 0);
340 sbi->gid = make_kgid(current_user_ns(), val);
341 if (!gid_valid(sbi->gid))
348 char *umask = args[0].from;
349 sbi->umask = simple_strtoul(umask, &umask, 8);
350 if (sbi->umask & ~0777) {
351 pr_err("JFS: Invalid value of umask\n");
359 struct request_queue *q = bdev_get_queue(sb->s_bdev);
360 /* if set to 1, even copying files will cause
362 * -> user has more control over the online trimming
364 sbi->minblks_trim = 64;
365 if (blk_queue_discard(q)) {
366 *flag |= JFS_DISCARD;
368 pr_err("JFS: discard option " \
369 "not supported on device\n");
375 *flag &= ~JFS_DISCARD;
378 case Opt_discard_minblk:
380 struct request_queue *q = bdev_get_queue(sb->s_bdev);
381 char *minblks_trim = args[0].from;
382 if (blk_queue_discard(q)) {
383 *flag |= JFS_DISCARD;
384 sbi->minblks_trim = simple_strtoull(
385 minblks_trim, &minblks_trim, 0);
387 pr_err("JFS: discard option " \
388 "not supported on device\n");
394 printk("jfs: Unrecognized mount option \"%s\" "
395 " or missing value\n", p);
400 if (nls_map != (void *) -1) {
401 /* Discard old (if remount) */
402 unload_nls(sbi->nls_tab);
403 sbi->nls_tab = nls_map;
408 if (nls_map && nls_map != (void *) -1)
413 static int jfs_remount(struct super_block *sb, int *flags, char *data)
417 int flag = JFS_SBI(sb)->flag;
420 if (!parse_options(data, sb, &newLVSize, &flag)) {
425 if (sb->s_flags & MS_RDONLY) {
426 pr_err("JFS: resize requires volume" \
427 " to be mounted read-write\n");
430 rc = jfs_extendfs(sb, newLVSize, 0);
435 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
437 * Invalidate any previously read metadata. fsck may have
438 * changed the on-disk data since we mounted r/o
440 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
442 JFS_SBI(sb)->flag = flag;
443 ret = jfs_mount_rw(sb, 1);
445 /* mark the fs r/w for quota activity */
446 sb->s_flags &= ~MS_RDONLY;
448 dquot_resume(sb, -1);
451 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
452 rc = dquot_suspend(sb, -1);
456 rc = jfs_umount_rw(sb);
457 JFS_SBI(sb)->flag = flag;
460 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
461 if (!(sb->s_flags & MS_RDONLY)) {
462 rc = jfs_umount_rw(sb);
466 JFS_SBI(sb)->flag = flag;
467 ret = jfs_mount_rw(sb, 1);
470 JFS_SBI(sb)->flag = flag;
475 static int jfs_fill_super(struct super_block *sb, void *data, int silent)
477 struct jfs_sb_info *sbi;
481 int flag, ret = -EINVAL;
483 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
485 if (!new_valid_dev(sb->s_bdev->bd_dev))
488 sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
493 sb->s_max_links = JFS_LINK_MAX;
495 sbi->uid = INVALID_UID;
496 sbi->gid = INVALID_GID;
499 /* initialize the mount flag and determine the default error handler */
500 flag = JFS_ERR_REMOUNT_RO;
502 if (!parse_options((char *) data, sb, &newLVSize, &flag))
506 #ifdef CONFIG_JFS_POSIX_ACL
507 sb->s_flags |= MS_POSIXACL;
511 pr_err("resize option for remount only\n");
516 * Initialize blocksize to 4K.
518 sb_set_blocksize(sb, PSIZE);
521 * Set method vectors.
523 sb->s_op = &jfs_super_operations;
524 sb->s_export_op = &jfs_export_operations;
526 sb->dq_op = &dquot_operations;
527 sb->s_qcop = &dquot_quotactl_ops;
531 * Initialize direct-mapping inode/address-space
533 inode = new_inode(sb);
539 inode->i_size = sb->s_bdev->bd_inode->i_size;
540 inode->i_mapping->a_ops = &jfs_metapage_aops;
541 insert_inode_hash(inode);
542 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
544 sbi->direct_inode = inode;
549 jfs_err("jfs_mount failed w/return code = %d", rc);
551 goto out_mount_failed;
553 if (sb->s_flags & MS_RDONLY)
556 rc = jfs_mount_rw(sb, 0);
559 jfs_err("jfs_mount_rw failed, return code = %d",
566 sb->s_magic = JFS_SUPER_MAGIC;
568 if (sbi->mntflag & JFS_OS2)
569 sb->s_d_op = &jfs_ci_dentry_operations;
571 inode = jfs_iget(sb, ROOT_I);
573 ret = PTR_ERR(inode);
576 sb->s_root = d_make_root(inode);
580 /* logical blocks are represented by 40 bits in pxd_t, etc. */
581 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
582 #if BITS_PER_LONG == 32
584 * Page cache is indexed by long.
585 * I would use MAX_LFS_FILESIZE, but it's only half as big
587 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes);
593 jfs_err("jfs_read_super: get root dentry failed");
598 jfs_err("jfs_umount failed with return code %d", rc);
601 filemap_write_and_wait(sbi->direct_inode->i_mapping);
602 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
603 make_bad_inode(sbi->direct_inode);
604 iput(sbi->direct_inode);
605 sbi->direct_inode = NULL;
608 unload_nls(sbi->nls_tab);
614 static int jfs_freeze(struct super_block *sb)
616 struct jfs_sb_info *sbi = JFS_SBI(sb);
617 struct jfs_log *log = sbi->log;
620 if (!(sb->s_flags & MS_RDONLY)) {
622 rc = lmLogShutdown(log);
624 jfs_error(sb, "lmLogShutdown failed\n");
626 /* let operations fail rather than hang */
631 rc = updateSuper(sb, FM_CLEAN);
633 jfs_err("jfs_freeze: updateSuper failed\n");
635 * Don't fail here. Everything succeeded except
636 * marking the superblock clean, so there's really
637 * no harm in leaving it frozen for now.
644 static int jfs_unfreeze(struct super_block *sb)
646 struct jfs_sb_info *sbi = JFS_SBI(sb);
647 struct jfs_log *log = sbi->log;
650 if (!(sb->s_flags & MS_RDONLY)) {
651 rc = updateSuper(sb, FM_MOUNT);
653 jfs_error(sb, "updateSuper failed\n");
658 jfs_error(sb, "lmLogInit failed\n");
665 static struct dentry *jfs_do_mount(struct file_system_type *fs_type,
666 int flags, const char *dev_name, void *data)
668 return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
671 static int jfs_sync_fs(struct super_block *sb, int wait)
673 struct jfs_log *log = JFS_SBI(sb)->log;
675 /* log == NULL indicates read-only mount */
678 * Write quota structures to quota file, sync_blockdev() will
679 * write them to disk later
681 dquot_writeback_dquots(sb, -1);
682 jfs_flush_journal(log, wait);
689 static int jfs_show_options(struct seq_file *seq, struct dentry *root)
691 struct jfs_sb_info *sbi = JFS_SBI(root->d_sb);
693 if (uid_valid(sbi->uid))
694 seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid));
695 if (gid_valid(sbi->gid))
696 seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid));
697 if (sbi->umask != -1)
698 seq_printf(seq, ",umask=%03o", sbi->umask);
699 if (sbi->flag & JFS_NOINTEGRITY)
700 seq_puts(seq, ",nointegrity");
701 if (sbi->flag & JFS_DISCARD)
702 seq_printf(seq, ",discard=%u", sbi->minblks_trim);
704 seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset);
705 if (sbi->flag & JFS_ERR_CONTINUE)
706 seq_printf(seq, ",errors=continue");
707 if (sbi->flag & JFS_ERR_PANIC)
708 seq_printf(seq, ",errors=panic");
711 if (sbi->flag & JFS_USRQUOTA)
712 seq_puts(seq, ",usrquota");
714 if (sbi->flag & JFS_GRPQUOTA)
715 seq_puts(seq, ",grpquota");
723 /* Read data from quotafile - avoid pagecache and such because we cannot afford
724 * acquiring the locks... As quota files are never truncated and quota code
725 * itself serializes the operations (and no one else should touch the files)
726 * we don't have to be afraid of races */
727 static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,
728 size_t len, loff_t off)
730 struct inode *inode = sb_dqopt(sb)->files[type];
731 sector_t blk = off >> sb->s_blocksize_bits;
733 int offset = off & (sb->s_blocksize - 1);
736 struct buffer_head tmp_bh;
737 struct buffer_head *bh;
738 loff_t i_size = i_size_read(inode);
742 if (off+len > i_size)
746 tocopy = sb->s_blocksize - offset < toread ?
747 sb->s_blocksize - offset : toread;
750 tmp_bh.b_size = 1 << inode->i_blkbits;
751 err = jfs_get_block(inode, blk, &tmp_bh, 0);
754 if (!buffer_mapped(&tmp_bh)) /* A hole? */
755 memset(data, 0, tocopy);
757 bh = sb_bread(sb, tmp_bh.b_blocknr);
760 memcpy(data, bh->b_data+offset, tocopy);
771 /* Write to quotafile */
772 static ssize_t jfs_quota_write(struct super_block *sb, int type,
773 const char *data, size_t len, loff_t off)
775 struct inode *inode = sb_dqopt(sb)->files[type];
776 sector_t blk = off >> sb->s_blocksize_bits;
778 int offset = off & (sb->s_blocksize - 1);
780 size_t towrite = len;
781 struct buffer_head tmp_bh;
782 struct buffer_head *bh;
784 mutex_lock(&inode->i_mutex);
785 while (towrite > 0) {
786 tocopy = sb->s_blocksize - offset < towrite ?
787 sb->s_blocksize - offset : towrite;
790 tmp_bh.b_size = 1 << inode->i_blkbits;
791 err = jfs_get_block(inode, blk, &tmp_bh, 1);
794 if (offset || tocopy != sb->s_blocksize)
795 bh = sb_bread(sb, tmp_bh.b_blocknr);
797 bh = sb_getblk(sb, tmp_bh.b_blocknr);
803 memcpy(bh->b_data+offset, data, tocopy);
804 flush_dcache_page(bh->b_page);
805 set_buffer_uptodate(bh);
806 mark_buffer_dirty(bh);
815 if (len == towrite) {
816 mutex_unlock(&inode->i_mutex);
819 if (inode->i_size < off+len-towrite)
820 i_size_write(inode, off+len-towrite);
822 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
823 mark_inode_dirty(inode);
824 mutex_unlock(&inode->i_mutex);
825 return len - towrite;
830 static const struct super_operations jfs_super_operations = {
831 .alloc_inode = jfs_alloc_inode,
832 .destroy_inode = jfs_destroy_inode,
833 .dirty_inode = jfs_dirty_inode,
834 .write_inode = jfs_write_inode,
835 .evict_inode = jfs_evict_inode,
836 .put_super = jfs_put_super,
837 .sync_fs = jfs_sync_fs,
838 .freeze_fs = jfs_freeze,
839 .unfreeze_fs = jfs_unfreeze,
840 .statfs = jfs_statfs,
841 .remount_fs = jfs_remount,
842 .show_options = jfs_show_options,
844 .quota_read = jfs_quota_read,
845 .quota_write = jfs_quota_write,
849 static const struct export_operations jfs_export_operations = {
850 .fh_to_dentry = jfs_fh_to_dentry,
851 .fh_to_parent = jfs_fh_to_parent,
852 .get_parent = jfs_get_parent,
855 static struct file_system_type jfs_fs_type = {
856 .owner = THIS_MODULE,
858 .mount = jfs_do_mount,
859 .kill_sb = kill_block_super,
860 .fs_flags = FS_REQUIRES_DEV,
862 MODULE_ALIAS_FS("jfs");
864 static void init_once(void *foo)
866 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
868 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
869 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
870 init_rwsem(&jfs_ip->rdwrlock);
871 mutex_init(&jfs_ip->commit_mutex);
872 init_rwsem(&jfs_ip->xattr_sem);
873 spin_lock_init(&jfs_ip->ag_lock);
874 jfs_ip->active_ag = -1;
875 inode_init_once(&jfs_ip->vfs_inode);
878 static int __init init_jfs_fs(void)
884 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
885 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
887 if (jfs_inode_cachep == NULL)
891 * Metapage initialization
893 rc = metapage_init();
895 jfs_err("metapage_init failed w/rc = %d", rc);
900 * Transaction Manager initialization
904 jfs_err("txInit failed w/rc = %d", rc);
909 * I/O completion thread (endio)
911 jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
912 if (IS_ERR(jfsIOthread)) {
913 rc = PTR_ERR(jfsIOthread);
914 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
918 if (commit_threads < 1)
919 commit_threads = num_online_cpus();
920 if (commit_threads > MAX_COMMIT_THREADS)
921 commit_threads = MAX_COMMIT_THREADS;
923 for (i = 0; i < commit_threads; i++) {
924 jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit");
925 if (IS_ERR(jfsCommitThread[i])) {
926 rc = PTR_ERR(jfsCommitThread[i]);
927 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
929 goto kill_committask;
933 jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
934 if (IS_ERR(jfsSyncThread)) {
935 rc = PTR_ERR(jfsSyncThread);
936 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
937 goto kill_committask;
944 rc = register_filesystem(&jfs_fs_type);
951 kthread_stop(jfsSyncThread);
953 for (i = 0; i < commit_threads; i++)
954 kthread_stop(jfsCommitThread[i]);
955 kthread_stop(jfsIOthread);
961 kmem_cache_destroy(jfs_inode_cachep);
965 static void __exit exit_jfs_fs(void)
969 jfs_info("exit_jfs_fs called");
974 kthread_stop(jfsIOthread);
975 for (i = 0; i < commit_threads; i++)
976 kthread_stop(jfsCommitThread[i]);
977 kthread_stop(jfsSyncThread);
981 unregister_filesystem(&jfs_fs_type);
984 * Make sure all delayed rcu free inodes are flushed before we
988 kmem_cache_destroy(jfs_inode_cachep);
991 module_init(init_jfs_fs)
992 module_exit(exit_jfs_fs)