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/config.h>
22 #include <linux/module.h>
23 #include <linux/parser.h>
24 #include <linux/completion.h>
25 #include <linux/vfs.h>
26 #include <linux/mount.h>
27 #include <linux/moduleparam.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");
58 static pid_t jfsIOthread;
59 static pid_t jfsCommitThread[MAX_COMMIT_THREADS];
60 static pid_t jfsSyncThread;
61 DECLARE_COMPLETION(jfsIOwait);
63 #ifdef CONFIG_JFS_DEBUG
64 int jfsloglevel = JFS_LOGLEVEL_WARN;
65 module_param(jfsloglevel, int, 0644);
66 MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
69 static void jfs_handle_error(struct super_block *sb)
71 struct jfs_sb_info *sbi = JFS_SBI(sb);
73 if (sb->s_flags & MS_RDONLY)
76 updateSuper(sb, FM_DIRTY);
78 if (sbi->flag & JFS_ERR_PANIC)
79 panic("JFS (device %s): panic forced after error\n",
81 else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
82 jfs_err("ERROR: (device %s): remounting filesystem "
85 sb->s_flags |= MS_RDONLY;
88 /* nothing is done for continue beyond marking the superblock dirty */
91 void jfs_error(struct super_block *sb, const char * function, ...)
93 static char error_buf[256];
96 va_start(args, function);
97 vsprintf(error_buf, function, args);
100 printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf);
102 jfs_handle_error(sb);
105 static struct inode *jfs_alloc_inode(struct super_block *sb)
107 struct jfs_inode_info *jfs_inode;
109 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
112 return &jfs_inode->vfs_inode;
115 static void jfs_destroy_inode(struct inode *inode)
117 struct jfs_inode_info *ji = JFS_IP(inode);
119 BUG_ON(!list_empty(&ji->anon_inode_list));
121 spin_lock_irq(&ji->ag_lock);
122 if (ji->active_ag != -1) {
123 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
124 atomic_dec(&bmap->db_active[ji->active_ag]);
127 spin_unlock_irq(&ji->ag_lock);
129 #ifdef CONFIG_JFS_POSIX_ACL
130 if (ji->i_acl != JFS_ACL_NOT_CACHED) {
131 posix_acl_release(ji->i_acl);
132 ji->i_acl = JFS_ACL_NOT_CACHED;
134 if (ji->i_default_acl != JFS_ACL_NOT_CACHED) {
135 posix_acl_release(ji->i_default_acl);
136 ji->i_default_acl = JFS_ACL_NOT_CACHED;
140 kmem_cache_free(jfs_inode_cachep, ji);
143 static int jfs_statfs(struct super_block *sb, struct kstatfs *buf)
145 struct jfs_sb_info *sbi = JFS_SBI(sb);
147 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
149 jfs_info("In jfs_statfs");
150 buf->f_type = JFS_SUPER_MAGIC;
151 buf->f_bsize = sbi->bsize;
152 buf->f_blocks = sbi->bmap->db_mapsize;
153 buf->f_bfree = sbi->bmap->db_nfree;
154 buf->f_bavail = sbi->bmap->db_nfree;
156 * If we really return the number of allocated & free inodes, some
157 * applications will fail because they won't see enough free inodes.
158 * We'll try to calculate some guess as to how may inodes we can
161 * buf->f_files = atomic_read(&imap->im_numinos);
162 * buf->f_ffree = atomic_read(&imap->im_numfree);
164 maxinodes = min((s64) atomic_read(&imap->im_numinos) +
165 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
166 << L2INOSPEREXT), (s64) 0xffffffffLL);
167 buf->f_files = maxinodes;
168 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
169 atomic_read(&imap->im_numfree));
171 buf->f_namelen = JFS_NAME_MAX;
175 static void jfs_put_super(struct super_block *sb)
177 struct jfs_sb_info *sbi = JFS_SBI(sb);
180 jfs_info("In jfs_put_super");
183 jfs_err("jfs_umount failed with return code %d", rc);
185 unload_nls(sbi->nls_tab);
188 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
189 iput(sbi->direct_inode);
190 sbi->direct_inode = NULL;
196 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
197 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
198 Opt_usrquota, Opt_grpquota, Opt_tagxid
201 static match_table_t tokens = {
202 {Opt_integrity, "integrity"},
203 {Opt_nointegrity, "nointegrity"},
204 {Opt_iocharset, "iocharset=%s"},
205 {Opt_resize, "resize=%u"},
206 {Opt_resize_nosize, "resize"},
207 {Opt_errors, "errors=%s"},
208 {Opt_tagxid, "tagxid"},
209 {Opt_ignore, "noquota"},
210 {Opt_ignore, "quota"},
211 {Opt_usrquota, "usrquota"},
212 {Opt_grpquota, "grpquota"},
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");
317 #ifndef CONFIG_INOXID_NONE
323 printk("jfs: Unrecognized mount option \"%s\" "
324 " or missing value\n", p);
329 if (nls_map != (void *) -1) {
330 /* Discard old (if remount) */
332 unload_nls(sbi->nls_tab);
333 sbi->nls_tab = nls_map;
338 if (nls_map && nls_map != (void *) -1)
343 static int jfs_remount(struct super_block *sb, int *flags, char *data)
347 int flag = JFS_SBI(sb)->flag;
349 if (!parse_options(data, sb, &newLVSize, &flag)) {
353 if ((flag & JFS_TAGXID) && !(sb->s_flags & MS_TAGXID)) {
354 printk(KERN_ERR "JFS: %s: tagxid not permitted on remount.\n",
360 if (sb->s_flags & MS_RDONLY) {
362 "JFS: resize requires volume to be mounted read-write\n");
365 rc = jfs_extendfs(sb, newLVSize, 0);
370 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
372 * Invalidate any previously read metadata. fsck may have
373 * changed the on-disk data since we mounted r/o
375 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
377 JFS_SBI(sb)->flag = flag;
378 return jfs_mount_rw(sb, 1);
380 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
381 rc = jfs_umount_rw(sb);
382 JFS_SBI(sb)->flag = flag;
385 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
386 if (!(sb->s_flags & MS_RDONLY)) {
387 rc = jfs_umount_rw(sb);
390 JFS_SBI(sb)->flag = flag;
391 return jfs_mount_rw(sb, 1);
393 JFS_SBI(sb)->flag = flag;
398 static int jfs_fill_super(struct super_block *sb, void *data, int silent)
400 struct jfs_sb_info *sbi;
406 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
408 if (!new_valid_dev(sb->s_bdev->bd_dev))
411 sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
414 memset(sbi, 0, sizeof (struct jfs_sb_info));
418 /* initialize the mount flag and determine the default error handler */
419 flag = JFS_ERR_REMOUNT_RO;
421 if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
427 #ifdef CONFIG_JFS_POSIX_ACL
428 sb->s_flags |= MS_POSIXACL;
430 /* map mount option tagxid */
431 if (sbi->flag & JFS_TAGXID)
432 sb->s_flags |= MS_TAGXID;
435 printk(KERN_ERR "resize option for remount only\n");
440 * Initialize blocksize to 4K.
442 sb_set_blocksize(sb, PSIZE);
445 * Set method vectors.
447 sb->s_op = &jfs_super_operations;
448 sb->s_export_op = &jfs_export_operations;
451 * Initialize direct-mapping inode/address-space
453 inode = new_inode(sb);
458 inode->i_size = sb->s_bdev->bd_inode->i_size;
459 inode->i_mapping->a_ops = &jfs_metapage_aops;
460 insert_inode_hash(inode);
461 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
463 sbi->direct_inode = inode;
468 jfs_err("jfs_mount failed w/return code = %d", rc);
470 goto out_mount_failed;
472 if (sb->s_flags & MS_RDONLY)
475 rc = jfs_mount_rw(sb, 0);
478 jfs_err("jfs_mount_rw failed, return code = %d",
485 sb->s_magic = JFS_SUPER_MAGIC;
487 inode = iget(sb, ROOT_I);
488 if (!inode || is_bad_inode(inode))
490 sb->s_root = d_alloc_root(inode);
494 if (sbi->mntflag & JFS_OS2)
495 sb->s_root->d_op = &jfs_ci_dentry_operations;
497 /* logical blocks are represented by 40 bits in pxd_t, etc. */
498 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
499 #if BITS_PER_LONG == 32
501 * Page cache is indexed by long.
502 * I would use MAX_LFS_FILESIZE, but it's only half as big
504 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
510 jfs_err("jfs_read_super: get root inode failed");
517 jfs_err("jfs_umount failed with return code %d", rc);
520 filemap_write_and_wait(sbi->direct_inode->i_mapping);
521 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
522 make_bad_inode(sbi->direct_inode);
523 iput(sbi->direct_inode);
524 sbi->direct_inode = NULL;
527 unload_nls(sbi->nls_tab);
532 static void jfs_write_super_lockfs(struct super_block *sb)
534 struct jfs_sb_info *sbi = JFS_SBI(sb);
535 struct jfs_log *log = sbi->log;
537 if (!(sb->s_flags & MS_RDONLY)) {
540 updateSuper(sb, FM_CLEAN);
544 static void jfs_unlockfs(struct super_block *sb)
546 struct jfs_sb_info *sbi = JFS_SBI(sb);
547 struct jfs_log *log = sbi->log;
550 if (!(sb->s_flags & MS_RDONLY)) {
551 updateSuper(sb, FM_MOUNT);
552 if ((rc = lmLogInit(log)))
553 jfs_err("jfs_unlock failed with return code %d", rc);
559 static struct super_block *jfs_get_sb(struct file_system_type *fs_type,
560 int flags, const char *dev_name, void *data)
562 return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
565 static int jfs_sync_fs(struct super_block *sb, int wait)
567 struct jfs_log *log = JFS_SBI(sb)->log;
569 /* log == NULL indicates read-only mount */
571 jfs_flush_journal(log, wait);
578 static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
580 struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb);
582 if (sbi->flag & JFS_NOINTEGRITY)
583 seq_puts(seq, ",nointegrity");
585 seq_puts(seq, ",integrity");
587 #if defined(CONFIG_QUOTA)
588 if (sbi->flag & JFS_USRQUOTA)
589 seq_puts(seq, ",usrquota");
591 if (sbi->flag & JFS_GRPQUOTA)
592 seq_puts(seq, ",grpquota");
598 static struct super_operations jfs_super_operations = {
599 .alloc_inode = jfs_alloc_inode,
600 .destroy_inode = jfs_destroy_inode,
601 .read_inode = jfs_read_inode,
602 .dirty_inode = jfs_dirty_inode,
603 .write_inode = jfs_write_inode,
604 .delete_inode = jfs_delete_inode,
605 .put_super = jfs_put_super,
606 .sync_fs = jfs_sync_fs,
607 .write_super_lockfs = jfs_write_super_lockfs,
608 .unlockfs = jfs_unlockfs,
609 .statfs = jfs_statfs,
610 .remount_fs = jfs_remount,
611 .show_options = jfs_show_options
614 static struct export_operations jfs_export_operations = {
615 .get_parent = jfs_get_parent,
618 static struct file_system_type jfs_fs_type = {
619 .owner = THIS_MODULE,
621 .get_sb = jfs_get_sb,
622 .kill_sb = kill_block_super,
623 .fs_flags = FS_REQUIRES_DEV,
626 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
628 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
630 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
631 SLAB_CTOR_CONSTRUCTOR) {
632 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
633 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
634 init_rwsem(&jfs_ip->rdwrlock);
635 init_MUTEX(&jfs_ip->commit_sem);
636 init_rwsem(&jfs_ip->xattr_sem);
637 spin_lock_init(&jfs_ip->ag_lock);
638 jfs_ip->active_ag = -1;
639 #ifdef CONFIG_JFS_POSIX_ACL
640 jfs_ip->i_acl = JFS_ACL_NOT_CACHED;
641 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED;
643 inode_init_once(&jfs_ip->vfs_inode);
647 static int __init init_jfs_fs(void)
653 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
654 SLAB_RECLAIM_ACCOUNT, init_once, NULL);
655 if (jfs_inode_cachep == NULL)
659 * Metapage initialization
661 rc = metapage_init();
663 jfs_err("metapage_init failed w/rc = %d", rc);
668 * Transaction Manager initialization
672 jfs_err("txInit failed w/rc = %d", rc);
677 * I/O completion thread (endio)
679 jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL);
680 if (jfsIOthread < 0) {
681 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread);
684 wait_for_completion(&jfsIOwait); /* Wait until thread starts */
686 if (commit_threads < 1)
687 commit_threads = num_online_cpus();
688 if (commit_threads > MAX_COMMIT_THREADS)
689 commit_threads = MAX_COMMIT_THREADS;
691 for (i = 0; i < commit_threads; i++) {
692 jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL,
694 if (jfsCommitThread[i] < 0) {
695 jfs_err("init_jfs_fs: fork failed w/rc = %d",
698 goto kill_committask;
700 /* Wait until thread starts */
701 wait_for_completion(&jfsIOwait);
704 jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL);
705 if (jfsSyncThread < 0) {
706 jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread);
707 goto kill_committask;
709 wait_for_completion(&jfsIOwait); /* Wait until thread starts */
715 return register_filesystem(&jfs_fs_type);
718 jfs_stop_threads = 1;
719 wake_up_all(&jfs_commit_thread_wait);
720 for (i = 0; i < commit_threads; i++)
721 wait_for_completion(&jfsIOwait);
723 wake_up(&jfs_IO_thread_wait);
724 wait_for_completion(&jfsIOwait); /* Wait for thread exit */
730 kmem_cache_destroy(jfs_inode_cachep);
734 static void __exit exit_jfs_fs(void)
738 jfs_info("exit_jfs_fs called");
740 jfs_stop_threads = 1;
743 wake_up(&jfs_IO_thread_wait);
744 wait_for_completion(&jfsIOwait); /* Wait until IO thread exits */
745 wake_up_all(&jfs_commit_thread_wait);
746 for (i = 0; i < commit_threads; i++)
747 wait_for_completion(&jfsIOwait);
748 wake_up(&jfs_sync_thread_wait);
749 wait_for_completion(&jfsIOwait); /* Wait until Sync thread exits */
753 unregister_filesystem(&jfs_fs_type);
754 kmem_cache_destroy(jfs_inode_cachep);
757 module_init(init_jfs_fs)
758 module_exit(exit_jfs_fs)