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>
37 #include "jfs_incore.h"
38 #include "jfs_filsys.h"
39 #include "jfs_inode.h"
40 #include "jfs_metapage.h"
41 #include "jfs_superblock.h"
45 #include "jfs_debug.h"
47 MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
48 MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
49 MODULE_LICENSE("GPL");
51 static struct kmem_cache
* jfs_inode_cachep
;
53 static const struct super_operations jfs_super_operations
;
54 static const struct export_operations jfs_export_operations
;
55 static struct file_system_type jfs_fs_type
;
57 #define MAX_COMMIT_THREADS 64
58 static int commit_threads
= 0;
59 module_param(commit_threads
, int, 0);
60 MODULE_PARM_DESC(commit_threads
, "Number of commit threads");
62 static struct task_struct
*jfsCommitThread
[MAX_COMMIT_THREADS
];
63 struct task_struct
*jfsIOthread
;
64 struct task_struct
*jfsSyncThread
;
66 #ifdef CONFIG_JFS_DEBUG
67 int jfsloglevel
= JFS_LOGLEVEL_WARN
;
68 module_param(jfsloglevel
, int, 0644);
69 MODULE_PARM_DESC(jfsloglevel
, "Specify JFS loglevel (0, 1 or 2)");
72 static void jfs_handle_error(struct super_block
*sb
)
74 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
76 if (sb
->s_flags
& MS_RDONLY
)
79 updateSuper(sb
, FM_DIRTY
);
81 if (sbi
->flag
& JFS_ERR_PANIC
)
82 panic("JFS (device %s): panic forced after error\n",
84 else if (sbi
->flag
& JFS_ERR_REMOUNT_RO
) {
85 jfs_err("ERROR: (device %s): remounting filesystem "
88 sb
->s_flags
|= MS_RDONLY
;
91 /* nothing is done for continue beyond marking the superblock dirty */
94 void jfs_error(struct super_block
*sb
, const char * function
, ...)
96 static char error_buf
[256];
99 va_start(args
, function
);
100 vsnprintf(error_buf
, sizeof(error_buf
), function
, args
);
103 printk(KERN_ERR
"ERROR: (device %s): %s\n", sb
->s_id
, error_buf
);
105 jfs_handle_error(sb
);
108 static struct inode
*jfs_alloc_inode(struct super_block
*sb
)
110 struct jfs_inode_info
*jfs_inode
;
112 jfs_inode
= kmem_cache_alloc(jfs_inode_cachep
, GFP_NOFS
);
115 return &jfs_inode
->vfs_inode
;
118 static void jfs_i_callback(struct rcu_head
*head
)
120 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
121 struct jfs_inode_info
*ji
= JFS_IP(inode
);
122 kmem_cache_free(jfs_inode_cachep
, ji
);
125 static void jfs_destroy_inode(struct inode
*inode
)
127 struct jfs_inode_info
*ji
= JFS_IP(inode
);
129 BUG_ON(!list_empty(&ji
->anon_inode_list
));
131 spin_lock_irq(&ji
->ag_lock
);
132 if (ji
->active_ag
!= -1) {
133 struct bmap
*bmap
= JFS_SBI(inode
->i_sb
)->bmap
;
134 atomic_dec(&bmap
->db_active
[ji
->active_ag
]);
137 spin_unlock_irq(&ji
->ag_lock
);
138 call_rcu(&inode
->i_rcu
, jfs_i_callback
);
141 static int jfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
143 struct jfs_sb_info
*sbi
= JFS_SBI(dentry
->d_sb
);
145 struct inomap
*imap
= JFS_IP(sbi
->ipimap
)->i_imap
;
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
;
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
159 * buf->f_files = atomic_read(&imap->im_numinos);
160 * buf->f_ffree = atomic_read(&imap->im_numfree);
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 buf
->f_fsid
.val
[0] = (u32
)crc32_le(0, sbi
->uuid
, sizeof(sbi
->uuid
)/2);
169 buf
->f_fsid
.val
[1] = (u32
)crc32_le(0, sbi
->uuid
+ sizeof(sbi
->uuid
)/2,
170 sizeof(sbi
->uuid
)/2);
172 buf
->f_namelen
= JFS_NAME_MAX
;
176 static void jfs_put_super(struct super_block
*sb
)
178 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
181 jfs_info("In jfs_put_super");
183 dquot_disable(sb
, -1, DQUOT_USAGE_ENABLED
| DQUOT_LIMITS_ENABLED
);
187 jfs_err("jfs_umount failed with return code %d", rc
);
189 unload_nls(sbi
->nls_tab
);
191 truncate_inode_pages(sbi
->direct_inode
->i_mapping
, 0);
192 iput(sbi
->direct_inode
);
198 Opt_integrity
, Opt_nointegrity
, Opt_iocharset
, Opt_resize
,
199 Opt_resize_nosize
, Opt_errors
, Opt_ignore
, Opt_err
, Opt_quota
,
200 Opt_usrquota
, Opt_grpquota
, Opt_uid
, Opt_gid
, Opt_umask
203 static const match_table_t tokens
= {
204 {Opt_integrity
, "integrity"},
205 {Opt_nointegrity
, "nointegrity"},
206 {Opt_iocharset
, "iocharset=%s"},
207 {Opt_resize
, "resize=%u"},
208 {Opt_resize_nosize
, "resize"},
209 {Opt_errors
, "errors=%s"},
210 {Opt_ignore
, "noquota"},
211 {Opt_ignore
, "quota"},
212 {Opt_usrquota
, "usrquota"},
213 {Opt_grpquota
, "grpquota"},
216 {Opt_umask
, "umask=%u"},
220 static int parse_options(char *options
, struct super_block
*sb
, s64
*newLVSize
,
223 void *nls_map
= (void *)-1; /* -1: no change; NULL: none */
225 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
232 while ((p
= strsep(&options
, ",")) != NULL
) {
233 substring_t args
[MAX_OPT_ARGS
];
238 token
= match_token(p
, tokens
, args
);
241 *flag
&= ~JFS_NOINTEGRITY
;
243 case Opt_nointegrity
:
244 *flag
|= JFS_NOINTEGRITY
;
247 /* Silently ignore the quota options */
248 /* Don't do anything ;-) */
251 if (nls_map
&& nls_map
!= (void *) -1)
253 if (!strcmp(args
[0].from
, "none"))
256 nls_map
= load_nls(args
[0].from
);
259 "JFS: charset not found\n");
266 char *resize
= args
[0].from
;
267 *newLVSize
= simple_strtoull(resize
, &resize
, 0);
270 case Opt_resize_nosize
:
272 *newLVSize
= sb
->s_bdev
->bd_inode
->i_size
>>
273 sb
->s_blocksize_bits
;
276 "JFS: Cannot determine volume size\n");
281 char *errors
= args
[0].from
;
282 if (!errors
|| !*errors
)
284 if (!strcmp(errors
, "continue")) {
285 *flag
&= ~JFS_ERR_REMOUNT_RO
;
286 *flag
&= ~JFS_ERR_PANIC
;
287 *flag
|= JFS_ERR_CONTINUE
;
288 } else if (!strcmp(errors
, "remount-ro")) {
289 *flag
&= ~JFS_ERR_CONTINUE
;
290 *flag
&= ~JFS_ERR_PANIC
;
291 *flag
|= JFS_ERR_REMOUNT_RO
;
292 } else if (!strcmp(errors
, "panic")) {
293 *flag
&= ~JFS_ERR_CONTINUE
;
294 *flag
&= ~JFS_ERR_REMOUNT_RO
;
295 *flag
|= JFS_ERR_PANIC
;
298 "JFS: %s is an invalid error handler\n",
308 *flag
|= JFS_USRQUOTA
;
311 *flag
|= JFS_GRPQUOTA
;
318 "JFS: quota operations not supported\n");
323 char *uid
= args
[0].from
;
324 sbi
->uid
= simple_strtoul(uid
, &uid
, 0);
329 char *gid
= args
[0].from
;
330 sbi
->gid
= simple_strtoul(gid
, &gid
, 0);
335 char *umask
= args
[0].from
;
336 sbi
->umask
= simple_strtoul(umask
, &umask
, 8);
337 if (sbi
->umask
& ~0777) {
339 "JFS: Invalid value of umask\n");
345 printk("jfs: Unrecognized mount option \"%s\" "
346 " or missing value\n", p
);
351 if (nls_map
!= (void *) -1) {
352 /* Discard old (if remount) */
353 unload_nls(sbi
->nls_tab
);
354 sbi
->nls_tab
= nls_map
;
359 if (nls_map
&& nls_map
!= (void *) -1)
364 static int jfs_remount(struct super_block
*sb
, int *flags
, char *data
)
368 int flag
= JFS_SBI(sb
)->flag
;
371 if (!parse_options(data
, sb
, &newLVSize
, &flag
)) {
376 if (sb
->s_flags
& MS_RDONLY
) {
378 "JFS: resize requires volume to be mounted read-write\n");
381 rc
= jfs_extendfs(sb
, newLVSize
, 0);
386 if ((sb
->s_flags
& MS_RDONLY
) && !(*flags
& MS_RDONLY
)) {
388 * Invalidate any previously read metadata. fsck may have
389 * changed the on-disk data since we mounted r/o
391 truncate_inode_pages(JFS_SBI(sb
)->direct_inode
->i_mapping
, 0);
393 JFS_SBI(sb
)->flag
= flag
;
394 ret
= jfs_mount_rw(sb
, 1);
396 /* mark the fs r/w for quota activity */
397 sb
->s_flags
&= ~MS_RDONLY
;
399 dquot_resume(sb
, -1);
402 if ((!(sb
->s_flags
& MS_RDONLY
)) && (*flags
& MS_RDONLY
)) {
403 rc
= dquot_suspend(sb
, -1);
407 rc
= jfs_umount_rw(sb
);
408 JFS_SBI(sb
)->flag
= flag
;
411 if ((JFS_SBI(sb
)->flag
& JFS_NOINTEGRITY
) != (flag
& JFS_NOINTEGRITY
))
412 if (!(sb
->s_flags
& MS_RDONLY
)) {
413 rc
= jfs_umount_rw(sb
);
417 JFS_SBI(sb
)->flag
= flag
;
418 ret
= jfs_mount_rw(sb
, 1);
421 JFS_SBI(sb
)->flag
= flag
;
426 static int jfs_fill_super(struct super_block
*sb
, void *data
, int silent
)
428 struct jfs_sb_info
*sbi
;
432 int flag
, ret
= -EINVAL
;
434 jfs_info("In jfs_read_super: s_flags=0x%lx", sb
->s_flags
);
436 if (!new_valid_dev(sb
->s_bdev
->bd_dev
))
439 sbi
= kzalloc(sizeof (struct jfs_sb_info
), GFP_KERNEL
);
444 sb
->s_max_links
= JFS_LINK_MAX
;
446 sbi
->uid
= sbi
->gid
= sbi
->umask
= -1;
448 /* initialize the mount flag and determine the default error handler */
449 flag
= JFS_ERR_REMOUNT_RO
;
451 if (!parse_options((char *) data
, sb
, &newLVSize
, &flag
))
455 #ifdef CONFIG_JFS_POSIX_ACL
456 sb
->s_flags
|= MS_POSIXACL
;
460 printk(KERN_ERR
"resize option for remount only\n");
465 * Initialize blocksize to 4K.
467 sb_set_blocksize(sb
, PSIZE
);
470 * Set method vectors.
472 sb
->s_op
= &jfs_super_operations
;
473 sb
->s_export_op
= &jfs_export_operations
;
475 sb
->dq_op
= &dquot_operations
;
476 sb
->s_qcop
= &dquot_quotactl_ops
;
480 * Initialize direct-mapping inode/address-space
482 inode
= new_inode(sb
);
488 inode
->i_size
= sb
->s_bdev
->bd_inode
->i_size
;
489 inode
->i_mapping
->a_ops
= &jfs_metapage_aops
;
490 insert_inode_hash(inode
);
491 mapping_set_gfp_mask(inode
->i_mapping
, GFP_NOFS
);
493 sbi
->direct_inode
= inode
;
498 jfs_err("jfs_mount failed w/return code = %d", rc
);
500 goto out_mount_failed
;
502 if (sb
->s_flags
& MS_RDONLY
)
505 rc
= jfs_mount_rw(sb
, 0);
508 jfs_err("jfs_mount_rw failed, return code = %d",
515 sb
->s_magic
= JFS_SUPER_MAGIC
;
517 if (sbi
->mntflag
& JFS_OS2
)
518 sb
->s_d_op
= &jfs_ci_dentry_operations
;
520 inode
= jfs_iget(sb
, ROOT_I
);
522 ret
= PTR_ERR(inode
);
525 sb
->s_root
= d_make_root(inode
);
529 /* logical blocks are represented by 40 bits in pxd_t, etc. */
530 sb
->s_maxbytes
= ((u64
) sb
->s_blocksize
) << 40;
531 #if BITS_PER_LONG == 32
533 * Page cache is indexed by long.
534 * I would use MAX_LFS_FILESIZE, but it's only half as big
536 sb
->s_maxbytes
= min(((u64
) PAGE_CACHE_SIZE
<< 32) - 1, (u64
)sb
->s_maxbytes
);
542 jfs_err("jfs_read_super: get root dentry failed");
547 jfs_err("jfs_umount failed with return code %d", rc
);
550 filemap_write_and_wait(sbi
->direct_inode
->i_mapping
);
551 truncate_inode_pages(sbi
->direct_inode
->i_mapping
, 0);
552 make_bad_inode(sbi
->direct_inode
);
553 iput(sbi
->direct_inode
);
554 sbi
->direct_inode
= NULL
;
557 unload_nls(sbi
->nls_tab
);
563 static int jfs_freeze(struct super_block
*sb
)
565 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
566 struct jfs_log
*log
= sbi
->log
;
568 if (!(sb
->s_flags
& MS_RDONLY
)) {
571 updateSuper(sb
, FM_CLEAN
);
576 static int jfs_unfreeze(struct super_block
*sb
)
578 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
579 struct jfs_log
*log
= sbi
->log
;
582 if (!(sb
->s_flags
& MS_RDONLY
)) {
583 updateSuper(sb
, FM_MOUNT
);
584 if ((rc
= lmLogInit(log
)))
585 jfs_err("jfs_unlock failed with return code %d", rc
);
592 static struct dentry
*jfs_do_mount(struct file_system_type
*fs_type
,
593 int flags
, const char *dev_name
, void *data
)
595 return mount_bdev(fs_type
, flags
, dev_name
, data
, jfs_fill_super
);
598 static int jfs_sync_fs(struct super_block
*sb
, int wait
)
600 struct jfs_log
*log
= JFS_SBI(sb
)->log
;
602 /* log == NULL indicates read-only mount */
605 * Write quota structures to quota file, sync_blockdev() will
606 * write them to disk later
608 dquot_writeback_dquots(sb
, -1);
609 jfs_flush_journal(log
, wait
);
616 static int jfs_show_options(struct seq_file
*seq
, struct dentry
*root
)
618 struct jfs_sb_info
*sbi
= JFS_SBI(root
->d_sb
);
621 seq_printf(seq
, ",uid=%d", sbi
->uid
);
623 seq_printf(seq
, ",gid=%d", sbi
->gid
);
624 if (sbi
->umask
!= -1)
625 seq_printf(seq
, ",umask=%03o", sbi
->umask
);
626 if (sbi
->flag
& JFS_NOINTEGRITY
)
627 seq_puts(seq
, ",nointegrity");
629 seq_printf(seq
, ",iocharset=%s", sbi
->nls_tab
->charset
);
630 if (sbi
->flag
& JFS_ERR_CONTINUE
)
631 seq_printf(seq
, ",errors=continue");
632 if (sbi
->flag
& JFS_ERR_PANIC
)
633 seq_printf(seq
, ",errors=panic");
636 if (sbi
->flag
& JFS_USRQUOTA
)
637 seq_puts(seq
, ",usrquota");
639 if (sbi
->flag
& JFS_GRPQUOTA
)
640 seq_puts(seq
, ",grpquota");
648 /* Read data from quotafile - avoid pagecache and such because we cannot afford
649 * acquiring the locks... As quota files are never truncated and quota code
650 * itself serializes the operations (and no one else should touch the files)
651 * we don't have to be afraid of races */
652 static ssize_t
jfs_quota_read(struct super_block
*sb
, int type
, char *data
,
653 size_t len
, loff_t off
)
655 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
656 sector_t blk
= off
>> sb
->s_blocksize_bits
;
658 int offset
= off
& (sb
->s_blocksize
- 1);
661 struct buffer_head tmp_bh
;
662 struct buffer_head
*bh
;
663 loff_t i_size
= i_size_read(inode
);
667 if (off
+len
> i_size
)
671 tocopy
= sb
->s_blocksize
- offset
< toread
?
672 sb
->s_blocksize
- offset
: toread
;
675 tmp_bh
.b_size
= 1 << inode
->i_blkbits
;
676 err
= jfs_get_block(inode
, blk
, &tmp_bh
, 0);
679 if (!buffer_mapped(&tmp_bh
)) /* A hole? */
680 memset(data
, 0, tocopy
);
682 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
685 memcpy(data
, bh
->b_data
+offset
, tocopy
);
696 /* Write to quotafile */
697 static ssize_t
jfs_quota_write(struct super_block
*sb
, int type
,
698 const char *data
, size_t len
, loff_t off
)
700 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
701 sector_t blk
= off
>> sb
->s_blocksize_bits
;
703 int offset
= off
& (sb
->s_blocksize
- 1);
705 size_t towrite
= len
;
706 struct buffer_head tmp_bh
;
707 struct buffer_head
*bh
;
709 mutex_lock(&inode
->i_mutex
);
710 while (towrite
> 0) {
711 tocopy
= sb
->s_blocksize
- offset
< towrite
?
712 sb
->s_blocksize
- offset
: towrite
;
715 tmp_bh
.b_size
= 1 << inode
->i_blkbits
;
716 err
= jfs_get_block(inode
, blk
, &tmp_bh
, 1);
719 if (offset
|| tocopy
!= sb
->s_blocksize
)
720 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
722 bh
= sb_getblk(sb
, tmp_bh
.b_blocknr
);
728 memcpy(bh
->b_data
+offset
, data
, tocopy
);
729 flush_dcache_page(bh
->b_page
);
730 set_buffer_uptodate(bh
);
731 mark_buffer_dirty(bh
);
740 if (len
== towrite
) {
741 mutex_unlock(&inode
->i_mutex
);
744 if (inode
->i_size
< off
+len
-towrite
)
745 i_size_write(inode
, off
+len
-towrite
);
747 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
748 mark_inode_dirty(inode
);
749 mutex_unlock(&inode
->i_mutex
);
750 return len
- towrite
;
755 static const struct super_operations jfs_super_operations
= {
756 .alloc_inode
= jfs_alloc_inode
,
757 .destroy_inode
= jfs_destroy_inode
,
758 .dirty_inode
= jfs_dirty_inode
,
759 .write_inode
= jfs_write_inode
,
760 .evict_inode
= jfs_evict_inode
,
761 .put_super
= jfs_put_super
,
762 .sync_fs
= jfs_sync_fs
,
763 .freeze_fs
= jfs_freeze
,
764 .unfreeze_fs
= jfs_unfreeze
,
765 .statfs
= jfs_statfs
,
766 .remount_fs
= jfs_remount
,
767 .show_options
= jfs_show_options
,
769 .quota_read
= jfs_quota_read
,
770 .quota_write
= jfs_quota_write
,
774 static const struct export_operations jfs_export_operations
= {
775 .fh_to_dentry
= jfs_fh_to_dentry
,
776 .fh_to_parent
= jfs_fh_to_parent
,
777 .get_parent
= jfs_get_parent
,
780 static struct file_system_type jfs_fs_type
= {
781 .owner
= THIS_MODULE
,
783 .mount
= jfs_do_mount
,
784 .kill_sb
= kill_block_super
,
785 .fs_flags
= FS_REQUIRES_DEV
,
788 static void init_once(void *foo
)
790 struct jfs_inode_info
*jfs_ip
= (struct jfs_inode_info
*) foo
;
792 memset(jfs_ip
, 0, sizeof(struct jfs_inode_info
));
793 INIT_LIST_HEAD(&jfs_ip
->anon_inode_list
);
794 init_rwsem(&jfs_ip
->rdwrlock
);
795 mutex_init(&jfs_ip
->commit_mutex
);
796 init_rwsem(&jfs_ip
->xattr_sem
);
797 spin_lock_init(&jfs_ip
->ag_lock
);
798 jfs_ip
->active_ag
= -1;
799 inode_init_once(&jfs_ip
->vfs_inode
);
802 static int __init
init_jfs_fs(void)
808 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info
), 0,
809 SLAB_RECLAIM_ACCOUNT
|SLAB_MEM_SPREAD
,
811 if (jfs_inode_cachep
== NULL
)
815 * Metapage initialization
817 rc
= metapage_init();
819 jfs_err("metapage_init failed w/rc = %d", rc
);
824 * Transaction Manager initialization
828 jfs_err("txInit failed w/rc = %d", rc
);
833 * I/O completion thread (endio)
835 jfsIOthread
= kthread_run(jfsIOWait
, NULL
, "jfsIO");
836 if (IS_ERR(jfsIOthread
)) {
837 rc
= PTR_ERR(jfsIOthread
);
838 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc
);
842 if (commit_threads
< 1)
843 commit_threads
= num_online_cpus();
844 if (commit_threads
> MAX_COMMIT_THREADS
)
845 commit_threads
= MAX_COMMIT_THREADS
;
847 for (i
= 0; i
< commit_threads
; i
++) {
848 jfsCommitThread
[i
] = kthread_run(jfs_lazycommit
, NULL
, "jfsCommit");
849 if (IS_ERR(jfsCommitThread
[i
])) {
850 rc
= PTR_ERR(jfsCommitThread
[i
]);
851 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc
);
853 goto kill_committask
;
857 jfsSyncThread
= kthread_run(jfs_sync
, NULL
, "jfsSync");
858 if (IS_ERR(jfsSyncThread
)) {
859 rc
= PTR_ERR(jfsSyncThread
);
860 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc
);
861 goto kill_committask
;
868 rc
= register_filesystem(&jfs_fs_type
);
875 kthread_stop(jfsSyncThread
);
877 for (i
= 0; i
< commit_threads
; i
++)
878 kthread_stop(jfsCommitThread
[i
]);
879 kthread_stop(jfsIOthread
);
885 kmem_cache_destroy(jfs_inode_cachep
);
889 static void __exit
exit_jfs_fs(void)
893 jfs_info("exit_jfs_fs called");
898 kthread_stop(jfsIOthread
);
899 for (i
= 0; i
< commit_threads
; i
++)
900 kthread_stop(jfsCommitThread
[i
]);
901 kthread_stop(jfsSyncThread
);
905 unregister_filesystem(&jfs_fs_type
);
908 * Make sure all delayed rcu free inodes are flushed before we
912 kmem_cache_destroy(jfs_inode_cachep
);
915 module_init(init_jfs_fs
)
916 module_exit(exit_jfs_fs
)