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/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>
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"
40 #include "jfs_debug.h"
42 MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
43 MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
44 MODULE_LICENSE("GPL");
46 static kmem_cache_t
* jfs_inode_cachep
;
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
;
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");
57 static struct task_struct
*jfsCommitThread
[MAX_COMMIT_THREADS
];
58 struct task_struct
*jfsIOthread
;
59 struct task_struct
*jfsSyncThread
;
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)");
67 static void jfs_handle_error(struct super_block
*sb
)
69 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
71 if (sb
->s_flags
& MS_RDONLY
)
74 updateSuper(sb
, FM_DIRTY
);
76 if (sbi
->flag
& JFS_ERR_PANIC
)
77 panic("JFS (device %s): panic forced after error\n",
79 else if (sbi
->flag
& JFS_ERR_REMOUNT_RO
) {
80 jfs_err("ERROR: (device %s): remounting filesystem "
83 sb
->s_flags
|= MS_RDONLY
;
86 /* nothing is done for continue beyond marking the superblock dirty */
89 void jfs_error(struct super_block
*sb
, const char * function
, ...)
91 static char error_buf
[256];
94 va_start(args
, function
);
95 vsprintf(error_buf
, function
, args
);
98 printk(KERN_ERR
"ERROR: (device %s): %s\n", sb
->s_id
, error_buf
);
100 jfs_handle_error(sb
);
103 static struct inode
*jfs_alloc_inode(struct super_block
*sb
)
105 struct jfs_inode_info
*jfs_inode
;
107 jfs_inode
= kmem_cache_alloc(jfs_inode_cachep
, GFP_NOFS
);
110 return &jfs_inode
->vfs_inode
;
113 static void jfs_destroy_inode(struct inode
*inode
)
115 struct jfs_inode_info
*ji
= JFS_IP(inode
);
117 BUG_ON(!list_empty(&ji
->anon_inode_list
));
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
]);
125 spin_unlock_irq(&ji
->ag_lock
);
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
;
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
;
138 kmem_cache_free(jfs_inode_cachep
, ji
);
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
));
169 buf
->f_namelen
= JFS_NAME_MAX
;
173 static void jfs_put_super(struct super_block
*sb
)
175 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
178 jfs_info("In jfs_put_super");
181 jfs_err("jfs_umount failed with return code %d", rc
);
183 unload_nls(sbi
->nls_tab
);
186 truncate_inode_pages(sbi
->direct_inode
->i_mapping
, 0);
187 iput(sbi
->direct_inode
);
188 sbi
->direct_inode
= NULL
;
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
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"},
212 {Opt_umask
, "umask=%u"},
216 static int parse_options(char *options
, struct super_block
*sb
, s64
*newLVSize
,
219 void *nls_map
= (void *)-1; /* -1: no change; NULL: none */
221 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
228 while ((p
= strsep(&options
, ",")) != NULL
) {
229 substring_t args
[MAX_OPT_ARGS
];
234 token
= match_token(p
, tokens
, args
);
237 *flag
&= ~JFS_NOINTEGRITY
;
239 case Opt_nointegrity
:
240 *flag
|= JFS_NOINTEGRITY
;
243 /* Silently ignore the quota options */
244 /* Don't do anything ;-) */
247 if (nls_map
&& nls_map
!= (void *) -1)
249 if (!strcmp(args
[0].from
, "none"))
252 nls_map
= load_nls(args
[0].from
);
255 "JFS: charset not found\n");
262 char *resize
= args
[0].from
;
263 *newLVSize
= simple_strtoull(resize
, &resize
, 0);
266 case Opt_resize_nosize
:
268 *newLVSize
= sb
->s_bdev
->bd_inode
->i_size
>>
269 sb
->s_blocksize_bits
;
272 "JFS: Cannot determine volume size\n");
277 char *errors
= args
[0].from
;
278 if (!errors
|| !*errors
)
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
;
294 "JFS: %s is an invalid error handler\n",
301 #if defined(CONFIG_QUOTA)
304 *flag
|= JFS_USRQUOTA
;
307 *flag
|= JFS_GRPQUOTA
;
314 "JFS: quota operations not supported\n");
319 char *uid
= args
[0].from
;
320 sbi
->uid
= simple_strtoul(uid
, &uid
, 0);
325 char *gid
= args
[0].from
;
326 sbi
->gid
= simple_strtoul(gid
, &gid
, 0);
331 char *umask
= args
[0].from
;
332 sbi
->umask
= simple_strtoul(umask
, &umask
, 8);
333 if (sbi
->umask
& ~0777) {
335 "JFS: Invalid value of umask\n");
341 printk("jfs: Unrecognized mount option \"%s\" "
342 " or missing value\n", p
);
347 if (nls_map
!= (void *) -1) {
348 /* Discard old (if remount) */
350 unload_nls(sbi
->nls_tab
);
351 sbi
->nls_tab
= nls_map
;
356 if (nls_map
&& nls_map
!= (void *) -1)
361 static int jfs_remount(struct super_block
*sb
, int *flags
, char *data
)
365 int flag
= JFS_SBI(sb
)->flag
;
367 if (!parse_options(data
, sb
, &newLVSize
, &flag
)) {
371 if (sb
->s_flags
& MS_RDONLY
) {
373 "JFS: resize requires volume to be mounted read-write\n");
376 rc
= jfs_extendfs(sb
, newLVSize
, 0);
381 if ((sb
->s_flags
& MS_RDONLY
) && !(*flags
& MS_RDONLY
)) {
383 * Invalidate any previously read metadata. fsck may have
384 * changed the on-disk data since we mounted r/o
386 truncate_inode_pages(JFS_SBI(sb
)->direct_inode
->i_mapping
, 0);
388 JFS_SBI(sb
)->flag
= flag
;
389 return jfs_mount_rw(sb
, 1);
391 if ((!(sb
->s_flags
& MS_RDONLY
)) && (*flags
& MS_RDONLY
)) {
392 rc
= jfs_umount_rw(sb
);
393 JFS_SBI(sb
)->flag
= flag
;
396 if ((JFS_SBI(sb
)->flag
& JFS_NOINTEGRITY
) != (flag
& JFS_NOINTEGRITY
))
397 if (!(sb
->s_flags
& MS_RDONLY
)) {
398 rc
= jfs_umount_rw(sb
);
401 JFS_SBI(sb
)->flag
= flag
;
402 return jfs_mount_rw(sb
, 1);
404 JFS_SBI(sb
)->flag
= flag
;
409 static int jfs_fill_super(struct super_block
*sb
, void *data
, int silent
)
411 struct jfs_sb_info
*sbi
;
417 jfs_info("In jfs_read_super: s_flags=0x%lx", sb
->s_flags
);
419 if (!new_valid_dev(sb
->s_bdev
->bd_dev
))
422 sbi
= kzalloc(sizeof (struct jfs_sb_info
), GFP_KERNEL
);
427 sbi
->uid
= sbi
->gid
= sbi
->umask
= -1;
429 /* initialize the mount flag and determine the default error handler */
430 flag
= JFS_ERR_REMOUNT_RO
;
432 if (!parse_options((char *) data
, sb
, &newLVSize
, &flag
)) {
438 #ifdef CONFIG_JFS_POSIX_ACL
439 sb
->s_flags
|= MS_POSIXACL
;
443 printk(KERN_ERR
"resize option for remount only\n");
448 * Initialize blocksize to 4K.
450 sb_set_blocksize(sb
, PSIZE
);
453 * Set method vectors.
455 sb
->s_op
= &jfs_super_operations
;
456 sb
->s_export_op
= &jfs_export_operations
;
459 * Initialize direct-mapping inode/address-space
461 inode
= new_inode(sb
);
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
);
471 sbi
->direct_inode
= inode
;
476 jfs_err("jfs_mount failed w/return code = %d", rc
);
478 goto out_mount_failed
;
480 if (sb
->s_flags
& MS_RDONLY
)
483 rc
= jfs_mount_rw(sb
, 0);
486 jfs_err("jfs_mount_rw failed, return code = %d",
493 sb
->s_magic
= JFS_SUPER_MAGIC
;
495 inode
= iget(sb
, ROOT_I
);
496 if (!inode
|| is_bad_inode(inode
))
498 sb
->s_root
= d_alloc_root(inode
);
502 if (sbi
->mntflag
& JFS_OS2
)
503 sb
->s_root
->d_op
= &jfs_ci_dentry_operations
;
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
509 * Page cache is indexed by long.
510 * I would use MAX_LFS_FILESIZE, but it's only half as big
512 sb
->s_maxbytes
= min(((u64
) PAGE_CACHE_SIZE
<< 32) - 1, sb
->s_maxbytes
);
518 jfs_err("jfs_read_super: get root inode failed");
525 jfs_err("jfs_umount failed with return code %d", rc
);
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
;
535 unload_nls(sbi
->nls_tab
);
540 static void jfs_write_super_lockfs(struct super_block
*sb
)
542 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
543 struct jfs_log
*log
= sbi
->log
;
545 if (!(sb
->s_flags
& MS_RDONLY
)) {
548 updateSuper(sb
, FM_CLEAN
);
552 static void jfs_unlockfs(struct super_block
*sb
)
554 struct jfs_sb_info
*sbi
= JFS_SBI(sb
);
555 struct jfs_log
*log
= sbi
->log
;
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
);
567 static int jfs_get_sb(struct file_system_type
*fs_type
,
568 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
570 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, jfs_fill_super
,
574 static int jfs_sync_fs(struct super_block
*sb
, int wait
)
576 struct jfs_log
*log
= JFS_SBI(sb
)->log
;
578 /* log == NULL indicates read-only mount */
580 jfs_flush_journal(log
, wait
);
587 static int jfs_show_options(struct seq_file
*seq
, struct vfsmount
*vfs
)
589 struct jfs_sb_info
*sbi
= JFS_SBI(vfs
->mnt_sb
);
592 seq_printf(seq
, ",uid=%d", sbi
->uid
);
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");
600 #if defined(CONFIG_QUOTA)
601 if (sbi
->flag
& JFS_USRQUOTA
)
602 seq_puts(seq
, ",usrquota");
604 if (sbi
->flag
& JFS_GRPQUOTA
)
605 seq_puts(seq
, ",grpquota");
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
627 static struct export_operations jfs_export_operations
= {
628 .get_parent
= jfs_get_parent
,
631 static struct file_system_type jfs_fs_type
= {
632 .owner
= THIS_MODULE
,
634 .get_sb
= jfs_get_sb
,
635 .kill_sb
= kill_block_super
,
636 .fs_flags
= FS_REQUIRES_DEV
,
639 static void init_once(void *foo
, kmem_cache_t
* cachep
, unsigned long flags
)
641 struct jfs_inode_info
*jfs_ip
= (struct jfs_inode_info
*) foo
;
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
;
656 inode_init_once(&jfs_ip
->vfs_inode
);
660 static int __init
init_jfs_fs(void)
666 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info
), 0,
667 SLAB_RECLAIM_ACCOUNT
|SLAB_MEM_SPREAD
,
669 if (jfs_inode_cachep
== NULL
)
673 * Metapage initialization
675 rc
= metapage_init();
677 jfs_err("metapage_init failed w/rc = %d", rc
);
682 * Transaction Manager initialization
686 jfs_err("txInit failed w/rc = %d", rc
);
691 * I/O completion thread (endio)
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
);
700 if (commit_threads
< 1)
701 commit_threads
= num_online_cpus();
702 if (commit_threads
> MAX_COMMIT_THREADS
)
703 commit_threads
= MAX_COMMIT_THREADS
;
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
);
711 goto kill_committask
;
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
;
726 return register_filesystem(&jfs_fs_type
);
729 for (i
= 0; i
< commit_threads
; i
++)
730 kthread_stop(jfsCommitThread
[i
]);
731 kthread_stop(jfsIOthread
);
737 kmem_cache_destroy(jfs_inode_cachep
);
741 static void __exit
exit_jfs_fs(void)
745 jfs_info("exit_jfs_fs called");
750 kthread_stop(jfsIOthread
);
751 for (i
= 0; i
< commit_threads
; i
++)
752 kthread_stop(jfsCommitThread
[i
]);
753 kthread_stop(jfsSyncThread
);
757 unregister_filesystem(&jfs_fs_type
);
758 kmem_cache_destroy(jfs_inode_cachep
);
761 module_init(init_jfs_fs
)
762 module_exit(exit_jfs_fs
)