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"
47 #include "jfs_xattr.h"
49 MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
50 MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
51 MODULE_LICENSE("GPL");
53 static struct kmem_cache * jfs_inode_cachep;
55 static const struct super_operations jfs_super_operations;
56 static const struct export_operations jfs_export_operations;
57 static struct file_system_type jfs_fs_type;
59 #define MAX_COMMIT_THREADS 64
60 static int commit_threads = 0;
61 module_param(commit_threads, int, 0);
62 MODULE_PARM_DESC(commit_threads, "Number of commit threads");
64 static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
65 struct task_struct *jfsIOthread;
66 struct task_struct *jfsSyncThread;
68 #ifdef CONFIG_JFS_DEBUG
69 int jfsloglevel = JFS_LOGLEVEL_WARN;
70 module_param(jfsloglevel, int, 0644);
71 MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
74 static void jfs_handle_error(struct super_block *sb)
76 struct jfs_sb_info *sbi = JFS_SBI(sb);
78 if (sb->s_flags & MS_RDONLY)
81 updateSuper(sb, FM_DIRTY);
83 if (sbi->flag & JFS_ERR_PANIC)
84 panic("JFS (device %s): panic forced after error\n",
86 else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
87 jfs_err("ERROR: (device %s): remounting filesystem "
90 sb->s_flags |= MS_RDONLY;
93 /* nothing is done for continue beyond marking the superblock dirty */
96 void jfs_error(struct super_block *sb, const char *fmt, ...)
106 pr_err("ERROR: (device %s): %pf: %pV\n",
107 sb->s_id, __builtin_return_address(0), &vaf);
111 jfs_handle_error(sb);
114 static struct inode *jfs_alloc_inode(struct super_block *sb)
116 struct jfs_inode_info *jfs_inode;
118 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
121 return &jfs_inode->vfs_inode;
124 static void jfs_i_callback(struct rcu_head *head)
126 struct inode *inode = container_of(head, struct inode, i_rcu);
127 struct jfs_inode_info *ji = JFS_IP(inode);
128 kmem_cache_free(jfs_inode_cachep, ji);
131 static void jfs_destroy_inode(struct inode *inode)
133 struct jfs_inode_info *ji = JFS_IP(inode);
135 BUG_ON(!list_empty(&ji->anon_inode_list));
137 spin_lock_irq(&ji->ag_lock);
138 if (ji->active_ag != -1) {
139 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
140 atomic_dec(&bmap->db_active[ji->active_ag]);
143 spin_unlock_irq(&ji->ag_lock);
144 call_rcu(&inode->i_rcu, jfs_i_callback);
147 static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
149 struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
151 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
153 jfs_info("In jfs_statfs");
154 buf->f_type = JFS_SUPER_MAGIC;
155 buf->f_bsize = sbi->bsize;
156 buf->f_blocks = sbi->bmap->db_mapsize;
157 buf->f_bfree = sbi->bmap->db_nfree;
158 buf->f_bavail = sbi->bmap->db_nfree;
160 * If we really return the number of allocated & free inodes, some
161 * applications will fail because they won't see enough free inodes.
162 * We'll try to calculate some guess as to how many inodes we can
165 * buf->f_files = atomic_read(&imap->im_numinos);
166 * buf->f_ffree = atomic_read(&imap->im_numfree);
168 maxinodes = min((s64) atomic_read(&imap->im_numinos) +
169 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
170 << L2INOSPEREXT), (s64) 0xffffffffLL);
171 buf->f_files = maxinodes;
172 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
173 atomic_read(&imap->im_numfree));
174 buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
175 buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
176 sizeof(sbi->uuid)/2);
178 buf->f_namelen = JFS_NAME_MAX;
182 static void jfs_put_super(struct super_block *sb)
184 struct jfs_sb_info *sbi = JFS_SBI(sb);
187 jfs_info("In jfs_put_super");
189 dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
193 jfs_err("jfs_umount failed with return code %d", rc);
195 unload_nls(sbi->nls_tab);
197 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
198 iput(sbi->direct_inode);
204 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
205 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
206 Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask,
207 Opt_discard, Opt_nodiscard, Opt_discard_minblk
210 static const match_table_t tokens = {
211 {Opt_integrity, "integrity"},
212 {Opt_nointegrity, "nointegrity"},
213 {Opt_iocharset, "iocharset=%s"},
214 {Opt_resize, "resize=%u"},
215 {Opt_resize_nosize, "resize"},
216 {Opt_errors, "errors=%s"},
217 {Opt_ignore, "noquota"},
218 {Opt_ignore, "quota"},
219 {Opt_usrquota, "usrquota"},
220 {Opt_grpquota, "grpquota"},
223 {Opt_umask, "umask=%u"},
224 {Opt_discard, "discard"},
225 {Opt_nodiscard, "nodiscard"},
226 {Opt_discard_minblk, "discard=%u"},
230 static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
233 void *nls_map = (void *)-1; /* -1: no change; NULL: none */
235 struct jfs_sb_info *sbi = JFS_SBI(sb);
242 while ((p = strsep(&options, ",")) != NULL) {
243 substring_t args[MAX_OPT_ARGS];
248 token = match_token(p, tokens, args);
251 *flag &= ~JFS_NOINTEGRITY;
253 case Opt_nointegrity:
254 *flag |= JFS_NOINTEGRITY;
257 /* Silently ignore the quota options */
258 /* Don't do anything ;-) */
261 if (nls_map && nls_map != (void *) -1)
263 if (!strcmp(args[0].from, "none"))
266 nls_map = load_nls(args[0].from);
268 pr_err("JFS: charset not found\n");
275 char *resize = args[0].from;
276 *newLVSize = simple_strtoull(resize, &resize, 0);
279 case Opt_resize_nosize:
281 *newLVSize = sb->s_bdev->bd_inode->i_size >>
282 sb->s_blocksize_bits;
284 pr_err("JFS: Cannot determine volume size\n");
289 char *errors = args[0].from;
290 if (!errors || !*errors)
292 if (!strcmp(errors, "continue")) {
293 *flag &= ~JFS_ERR_REMOUNT_RO;
294 *flag &= ~JFS_ERR_PANIC;
295 *flag |= JFS_ERR_CONTINUE;
296 } else if (!strcmp(errors, "remount-ro")) {
297 *flag &= ~JFS_ERR_CONTINUE;
298 *flag &= ~JFS_ERR_PANIC;
299 *flag |= JFS_ERR_REMOUNT_RO;
300 } else if (!strcmp(errors, "panic")) {
301 *flag &= ~JFS_ERR_CONTINUE;
302 *flag &= ~JFS_ERR_REMOUNT_RO;
303 *flag |= JFS_ERR_PANIC;
305 pr_err("JFS: %s is an invalid error handler\n",
315 *flag |= JFS_USRQUOTA;
318 *flag |= JFS_GRPQUOTA;
324 pr_err("JFS: quota operations not supported\n");
329 char *uid = args[0].from;
330 uid_t val = simple_strtoul(uid, &uid, 0);
331 sbi->uid = make_kuid(current_user_ns(), val);
332 if (!uid_valid(sbi->uid))
339 char *gid = args[0].from;
340 gid_t val = simple_strtoul(gid, &gid, 0);
341 sbi->gid = make_kgid(current_user_ns(), val);
342 if (!gid_valid(sbi->gid))
349 char *umask = args[0].from;
350 sbi->umask = simple_strtoul(umask, &umask, 8);
351 if (sbi->umask & ~0777) {
352 pr_err("JFS: Invalid value of umask\n");
360 struct request_queue *q = bdev_get_queue(sb->s_bdev);
361 /* if set to 1, even copying files will cause
363 * -> user has more control over the online trimming
365 sbi->minblks_trim = 64;
366 if (blk_queue_discard(q)) {
367 *flag |= JFS_DISCARD;
369 pr_err("JFS: discard option " \
370 "not supported on device\n");
376 *flag &= ~JFS_DISCARD;
379 case Opt_discard_minblk:
381 struct request_queue *q = bdev_get_queue(sb->s_bdev);
382 char *minblks_trim = args[0].from;
383 if (blk_queue_discard(q)) {
384 *flag |= JFS_DISCARD;
385 sbi->minblks_trim = simple_strtoull(
386 minblks_trim, &minblks_trim, 0);
388 pr_err("JFS: discard option " \
389 "not supported on device\n");
395 printk("jfs: Unrecognized mount option \"%s\" "
396 " or missing value\n", p);
401 if (nls_map != (void *) -1) {
402 /* Discard old (if remount) */
403 unload_nls(sbi->nls_tab);
404 sbi->nls_tab = nls_map;
409 if (nls_map && nls_map != (void *) -1)
414 static int jfs_remount(struct super_block *sb, int *flags, char *data)
418 int flag = JFS_SBI(sb)->flag;
421 if (!parse_options(data, sb, &newLVSize, &flag)) {
426 if (sb->s_flags & MS_RDONLY) {
427 pr_err("JFS: resize requires volume" \
428 " to be mounted read-write\n");
431 rc = jfs_extendfs(sb, newLVSize, 0);
436 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
438 * Invalidate any previously read metadata. fsck may have
439 * changed the on-disk data since we mounted r/o
441 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
443 JFS_SBI(sb)->flag = flag;
444 ret = jfs_mount_rw(sb, 1);
446 /* mark the fs r/w for quota activity */
447 sb->s_flags &= ~MS_RDONLY;
449 dquot_resume(sb, -1);
452 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
453 rc = dquot_suspend(sb, -1);
457 rc = jfs_umount_rw(sb);
458 JFS_SBI(sb)->flag = flag;
461 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
462 if (!(sb->s_flags & MS_RDONLY)) {
463 rc = jfs_umount_rw(sb);
467 JFS_SBI(sb)->flag = flag;
468 ret = jfs_mount_rw(sb, 1);
471 JFS_SBI(sb)->flag = flag;
476 static int jfs_fill_super(struct super_block *sb, void *data, int silent)
478 struct jfs_sb_info *sbi;
482 int flag, ret = -EINVAL;
484 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
486 if (!new_valid_dev(sb->s_bdev->bd_dev))
489 sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
494 sb->s_max_links = JFS_LINK_MAX;
496 sbi->uid = INVALID_UID;
497 sbi->gid = INVALID_GID;
500 /* initialize the mount flag and determine the default error handler */
501 flag = JFS_ERR_REMOUNT_RO;
503 if (!parse_options((char *) data, sb, &newLVSize, &flag))
507 #ifdef CONFIG_JFS_POSIX_ACL
508 sb->s_flags |= MS_POSIXACL;
512 pr_err("resize option for remount only\n");
517 * Initialize blocksize to 4K.
519 sb_set_blocksize(sb, PSIZE);
522 * Set method vectors.
524 sb->s_op = &jfs_super_operations;
525 sb->s_export_op = &jfs_export_operations;
526 sb->s_xattr = jfs_xattr_handlers;
528 sb->dq_op = &dquot_operations;
529 sb->s_qcop = &dquot_quotactl_ops;
533 * Initialize direct-mapping inode/address-space
535 inode = new_inode(sb);
541 inode->i_size = sb->s_bdev->bd_inode->i_size;
542 inode->i_mapping->a_ops = &jfs_metapage_aops;
543 insert_inode_hash(inode);
544 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
546 sbi->direct_inode = inode;
551 jfs_err("jfs_mount failed w/return code = %d", rc);
553 goto out_mount_failed;
555 if (sb->s_flags & MS_RDONLY)
558 rc = jfs_mount_rw(sb, 0);
561 jfs_err("jfs_mount_rw failed, return code = %d",
568 sb->s_magic = JFS_SUPER_MAGIC;
570 if (sbi->mntflag & JFS_OS2)
571 sb->s_d_op = &jfs_ci_dentry_operations;
573 inode = jfs_iget(sb, ROOT_I);
575 ret = PTR_ERR(inode);
578 sb->s_root = d_make_root(inode);
582 /* logical blocks are represented by 40 bits in pxd_t, etc. */
583 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
584 #if BITS_PER_LONG == 32
586 * Page cache is indexed by long.
587 * I would use MAX_LFS_FILESIZE, but it's only half as big
589 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes);
595 jfs_err("jfs_read_super: get root dentry failed");
600 jfs_err("jfs_umount failed with return code %d", rc);
603 filemap_write_and_wait(sbi->direct_inode->i_mapping);
604 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
605 make_bad_inode(sbi->direct_inode);
606 iput(sbi->direct_inode);
607 sbi->direct_inode = NULL;
610 unload_nls(sbi->nls_tab);
616 static int jfs_freeze(struct super_block *sb)
618 struct jfs_sb_info *sbi = JFS_SBI(sb);
619 struct jfs_log *log = sbi->log;
622 if (!(sb->s_flags & MS_RDONLY)) {
624 rc = lmLogShutdown(log);
626 jfs_error(sb, "lmLogShutdown failed\n");
628 /* let operations fail rather than hang */
633 rc = updateSuper(sb, FM_CLEAN);
635 jfs_err("jfs_freeze: updateSuper failed\n");
637 * Don't fail here. Everything succeeded except
638 * marking the superblock clean, so there's really
639 * no harm in leaving it frozen for now.
646 static int jfs_unfreeze(struct super_block *sb)
648 struct jfs_sb_info *sbi = JFS_SBI(sb);
649 struct jfs_log *log = sbi->log;
652 if (!(sb->s_flags & MS_RDONLY)) {
653 rc = updateSuper(sb, FM_MOUNT);
655 jfs_error(sb, "updateSuper failed\n");
660 jfs_error(sb, "lmLogInit failed\n");
667 static struct dentry *jfs_do_mount(struct file_system_type *fs_type,
668 int flags, const char *dev_name, void *data)
670 return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
673 static int jfs_sync_fs(struct super_block *sb, int wait)
675 struct jfs_log *log = JFS_SBI(sb)->log;
677 /* log == NULL indicates read-only mount */
680 * Write quota structures to quota file, sync_blockdev() will
681 * write them to disk later
683 dquot_writeback_dquots(sb, -1);
684 jfs_flush_journal(log, wait);
691 static int jfs_show_options(struct seq_file *seq, struct dentry *root)
693 struct jfs_sb_info *sbi = JFS_SBI(root->d_sb);
695 if (uid_valid(sbi->uid))
696 seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid));
697 if (gid_valid(sbi->gid))
698 seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid));
699 if (sbi->umask != -1)
700 seq_printf(seq, ",umask=%03o", sbi->umask);
701 if (sbi->flag & JFS_NOINTEGRITY)
702 seq_puts(seq, ",nointegrity");
703 if (sbi->flag & JFS_DISCARD)
704 seq_printf(seq, ",discard=%u", sbi->minblks_trim);
706 seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset);
707 if (sbi->flag & JFS_ERR_CONTINUE)
708 seq_printf(seq, ",errors=continue");
709 if (sbi->flag & JFS_ERR_PANIC)
710 seq_printf(seq, ",errors=panic");
713 if (sbi->flag & JFS_USRQUOTA)
714 seq_puts(seq, ",usrquota");
716 if (sbi->flag & JFS_GRPQUOTA)
717 seq_puts(seq, ",grpquota");
725 /* Read data from quotafile - avoid pagecache and such because we cannot afford
726 * acquiring the locks... As quota files are never truncated and quota code
727 * itself serializes the operations (and no one else should touch the files)
728 * we don't have to be afraid of races */
729 static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,
730 size_t len, loff_t off)
732 struct inode *inode = sb_dqopt(sb)->files[type];
733 sector_t blk = off >> sb->s_blocksize_bits;
735 int offset = off & (sb->s_blocksize - 1);
738 struct buffer_head tmp_bh;
739 struct buffer_head *bh;
740 loff_t i_size = i_size_read(inode);
744 if (off+len > i_size)
748 tocopy = sb->s_blocksize - offset < toread ?
749 sb->s_blocksize - offset : toread;
752 tmp_bh.b_size = 1 << inode->i_blkbits;
753 err = jfs_get_block(inode, blk, &tmp_bh, 0);
756 if (!buffer_mapped(&tmp_bh)) /* A hole? */
757 memset(data, 0, tocopy);
759 bh = sb_bread(sb, tmp_bh.b_blocknr);
762 memcpy(data, bh->b_data+offset, tocopy);
773 /* Write to quotafile */
774 static ssize_t jfs_quota_write(struct super_block *sb, int type,
775 const char *data, size_t len, loff_t off)
777 struct inode *inode = sb_dqopt(sb)->files[type];
778 sector_t blk = off >> sb->s_blocksize_bits;
780 int offset = off & (sb->s_blocksize - 1);
782 size_t towrite = len;
783 struct buffer_head tmp_bh;
784 struct buffer_head *bh;
786 mutex_lock(&inode->i_mutex);
787 while (towrite > 0) {
788 tocopy = sb->s_blocksize - offset < towrite ?
789 sb->s_blocksize - offset : towrite;
792 tmp_bh.b_size = 1 << inode->i_blkbits;
793 err = jfs_get_block(inode, blk, &tmp_bh, 1);
796 if (offset || tocopy != sb->s_blocksize)
797 bh = sb_bread(sb, tmp_bh.b_blocknr);
799 bh = sb_getblk(sb, tmp_bh.b_blocknr);
805 memcpy(bh->b_data+offset, data, tocopy);
806 flush_dcache_page(bh->b_page);
807 set_buffer_uptodate(bh);
808 mark_buffer_dirty(bh);
817 if (len == towrite) {
818 mutex_unlock(&inode->i_mutex);
821 if (inode->i_size < off+len-towrite)
822 i_size_write(inode, off+len-towrite);
824 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
825 mark_inode_dirty(inode);
826 mutex_unlock(&inode->i_mutex);
827 return len - towrite;
832 static const struct super_operations jfs_super_operations = {
833 .alloc_inode = jfs_alloc_inode,
834 .destroy_inode = jfs_destroy_inode,
835 .dirty_inode = jfs_dirty_inode,
836 .write_inode = jfs_write_inode,
837 .evict_inode = jfs_evict_inode,
838 .put_super = jfs_put_super,
839 .sync_fs = jfs_sync_fs,
840 .freeze_fs = jfs_freeze,
841 .unfreeze_fs = jfs_unfreeze,
842 .statfs = jfs_statfs,
843 .remount_fs = jfs_remount,
844 .show_options = jfs_show_options,
846 .quota_read = jfs_quota_read,
847 .quota_write = jfs_quota_write,
851 static const struct export_operations jfs_export_operations = {
852 .fh_to_dentry = jfs_fh_to_dentry,
853 .fh_to_parent = jfs_fh_to_parent,
854 .get_parent = jfs_get_parent,
857 static struct file_system_type jfs_fs_type = {
858 .owner = THIS_MODULE,
860 .mount = jfs_do_mount,
861 .kill_sb = kill_block_super,
862 .fs_flags = FS_REQUIRES_DEV,
864 MODULE_ALIAS_FS("jfs");
866 static void init_once(void *foo)
868 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
870 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
871 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
872 init_rwsem(&jfs_ip->rdwrlock);
873 mutex_init(&jfs_ip->commit_mutex);
874 init_rwsem(&jfs_ip->xattr_sem);
875 spin_lock_init(&jfs_ip->ag_lock);
876 jfs_ip->active_ag = -1;
877 inode_init_once(&jfs_ip->vfs_inode);
880 static int __init init_jfs_fs(void)
886 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
887 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
889 if (jfs_inode_cachep == NULL)
893 * Metapage initialization
895 rc = metapage_init();
897 jfs_err("metapage_init failed w/rc = %d", rc);
902 * Transaction Manager initialization
906 jfs_err("txInit failed w/rc = %d", rc);
911 * I/O completion thread (endio)
913 jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
914 if (IS_ERR(jfsIOthread)) {
915 rc = PTR_ERR(jfsIOthread);
916 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
920 if (commit_threads < 1)
921 commit_threads = num_online_cpus();
922 if (commit_threads > MAX_COMMIT_THREADS)
923 commit_threads = MAX_COMMIT_THREADS;
925 for (i = 0; i < commit_threads; i++) {
926 jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit");
927 if (IS_ERR(jfsCommitThread[i])) {
928 rc = PTR_ERR(jfsCommitThread[i]);
929 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
931 goto kill_committask;
935 jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
936 if (IS_ERR(jfsSyncThread)) {
937 rc = PTR_ERR(jfsSyncThread);
938 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
939 goto kill_committask;
946 rc = register_filesystem(&jfs_fs_type);
953 kthread_stop(jfsSyncThread);
955 for (i = 0; i < commit_threads; i++)
956 kthread_stop(jfsCommitThread[i]);
957 kthread_stop(jfsIOthread);
963 kmem_cache_destroy(jfs_inode_cachep);
967 static void __exit exit_jfs_fs(void)
971 jfs_info("exit_jfs_fs called");
976 kthread_stop(jfsIOthread);
977 for (i = 0; i < commit_threads; i++)
978 kthread_stop(jfsCommitThread[i]);
979 kthread_stop(jfsSyncThread);
983 unregister_filesystem(&jfs_fs_type);
986 * Make sure all delayed rcu free inodes are flushed before we
990 kmem_cache_destroy(jfs_inode_cachep);
993 module_init(init_jfs_fs)
994 module_exit(exit_jfs_fs)