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/kthread.h>
29 #include <linux/posix_acl.h>
30 #include <asm/uaccess.h>
31 #include <linux/seq_file.h>
33 #include "jfs_incore.h"
34 #include "jfs_filsys.h"
35 #include "jfs_inode.h"
36 #include "jfs_metapage.h"
37 #include "jfs_superblock.h"
41 #include "jfs_debug.h"
43 MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
44 MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
45 MODULE_LICENSE("GPL");
47 static kmem_cache_t * jfs_inode_cachep;
49 static struct super_operations jfs_super_operations;
50 static struct export_operations jfs_export_operations;
51 static struct file_system_type jfs_fs_type;
53 #define MAX_COMMIT_THREADS 64
54 static int commit_threads = 0;
55 module_param(commit_threads, int, 0);
56 MODULE_PARM_DESC(commit_threads, "Number of commit threads");
58 static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
59 struct task_struct *jfsIOthread;
60 struct task_struct *jfsSyncThread;
62 #ifdef CONFIG_JFS_DEBUG
63 int jfsloglevel = JFS_LOGLEVEL_WARN;
64 module_param(jfsloglevel, int, 0644);
65 MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
68 static void jfs_handle_error(struct super_block *sb)
70 struct jfs_sb_info *sbi = JFS_SBI(sb);
72 if (sb->s_flags & MS_RDONLY)
75 updateSuper(sb, FM_DIRTY);
77 if (sbi->flag & JFS_ERR_PANIC)
78 panic("JFS (device %s): panic forced after error\n",
80 else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
81 jfs_err("ERROR: (device %s): remounting filesystem "
84 sb->s_flags |= MS_RDONLY;
87 /* nothing is done for continue beyond marking the superblock dirty */
90 void jfs_error(struct super_block *sb, const char * function, ...)
92 static char error_buf[256];
95 va_start(args, function);
96 vsprintf(error_buf, function, args);
99 printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf);
101 jfs_handle_error(sb);
104 static struct inode *jfs_alloc_inode(struct super_block *sb)
106 struct jfs_inode_info *jfs_inode;
108 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
111 return &jfs_inode->vfs_inode;
114 static void jfs_destroy_inode(struct inode *inode)
116 struct jfs_inode_info *ji = JFS_IP(inode);
118 BUG_ON(!list_empty(&ji->anon_inode_list));
120 spin_lock_irq(&ji->ag_lock);
121 if (ji->active_ag != -1) {
122 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
123 atomic_dec(&bmap->db_active[ji->active_ag]);
126 spin_unlock_irq(&ji->ag_lock);
128 #ifdef CONFIG_JFS_POSIX_ACL
129 if (ji->i_acl != JFS_ACL_NOT_CACHED) {
130 posix_acl_release(ji->i_acl);
131 ji->i_acl = JFS_ACL_NOT_CACHED;
133 if (ji->i_default_acl != JFS_ACL_NOT_CACHED) {
134 posix_acl_release(ji->i_default_acl);
135 ji->i_default_acl = JFS_ACL_NOT_CACHED;
139 kmem_cache_free(jfs_inode_cachep, ji);
142 static int jfs_statfs(struct super_block *sb, struct kstatfs *buf)
144 struct jfs_sb_info *sbi = JFS_SBI(sb);
146 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
148 jfs_info("In jfs_statfs");
149 buf->f_type = JFS_SUPER_MAGIC;
150 buf->f_bsize = sbi->bsize;
151 buf->f_blocks = sbi->bmap->db_mapsize;
152 buf->f_bfree = sbi->bmap->db_nfree;
153 buf->f_bavail = sbi->bmap->db_nfree;
155 * If we really return the number of allocated & free inodes, some
156 * applications will fail because they won't see enough free inodes.
157 * We'll try to calculate some guess as to how may inodes we can
160 * buf->f_files = atomic_read(&imap->im_numinos);
161 * buf->f_ffree = atomic_read(&imap->im_numfree);
163 maxinodes = min((s64) atomic_read(&imap->im_numinos) +
164 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
165 << L2INOSPEREXT), (s64) 0xffffffffLL);
166 buf->f_files = maxinodes;
167 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
168 atomic_read(&imap->im_numfree));
170 buf->f_namelen = JFS_NAME_MAX;
174 static void jfs_put_super(struct super_block *sb)
176 struct jfs_sb_info *sbi = JFS_SBI(sb);
179 jfs_info("In jfs_put_super");
182 jfs_err("jfs_umount failed with return code %d", rc);
184 unload_nls(sbi->nls_tab);
187 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
188 iput(sbi->direct_inode);
189 sbi->direct_inode = NULL;
195 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
196 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
197 Opt_usrquota, Opt_grpquota
200 static match_table_t tokens = {
201 {Opt_integrity, "integrity"},
202 {Opt_nointegrity, "nointegrity"},
203 {Opt_iocharset, "iocharset=%s"},
204 {Opt_resize, "resize=%u"},
205 {Opt_resize_nosize, "resize"},
206 {Opt_errors, "errors=%s"},
207 {Opt_ignore, "noquota"},
208 {Opt_ignore, "quota"},
209 {Opt_usrquota, "usrquota"},
210 {Opt_grpquota, "grpquota"},
214 static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
217 void *nls_map = (void *)-1; /* -1: no change; NULL: none */
219 struct jfs_sb_info *sbi = JFS_SBI(sb);
226 while ((p = strsep(&options, ",")) != NULL) {
227 substring_t args[MAX_OPT_ARGS];
232 token = match_token(p, tokens, args);
235 *flag &= ~JFS_NOINTEGRITY;
237 case Opt_nointegrity:
238 *flag |= JFS_NOINTEGRITY;
241 /* Silently ignore the quota options */
242 /* Don't do anything ;-) */
245 if (nls_map && nls_map != (void *) -1)
247 if (!strcmp(args[0].from, "none"))
250 nls_map = load_nls(args[0].from);
253 "JFS: charset not found\n");
260 char *resize = args[0].from;
261 *newLVSize = simple_strtoull(resize, &resize, 0);
264 case Opt_resize_nosize:
266 *newLVSize = sb->s_bdev->bd_inode->i_size >>
267 sb->s_blocksize_bits;
270 "JFS: Cannot determine volume size\n");
275 char *errors = args[0].from;
276 if (!errors || !*errors)
278 if (!strcmp(errors, "continue")) {
279 *flag &= ~JFS_ERR_REMOUNT_RO;
280 *flag &= ~JFS_ERR_PANIC;
281 *flag |= JFS_ERR_CONTINUE;
282 } else if (!strcmp(errors, "remount-ro")) {
283 *flag &= ~JFS_ERR_CONTINUE;
284 *flag &= ~JFS_ERR_PANIC;
285 *flag |= JFS_ERR_REMOUNT_RO;
286 } else if (!strcmp(errors, "panic")) {
287 *flag &= ~JFS_ERR_CONTINUE;
288 *flag &= ~JFS_ERR_REMOUNT_RO;
289 *flag |= JFS_ERR_PANIC;
292 "JFS: %s is an invalid error handler\n",
299 #if defined(CONFIG_QUOTA)
302 *flag |= JFS_USRQUOTA;
305 *flag |= JFS_GRPQUOTA;
312 "JFS: quota operations not supported\n");
317 printk("jfs: Unrecognized mount option \"%s\" "
318 " or missing value\n", p);
323 if (nls_map != (void *) -1) {
324 /* Discard old (if remount) */
326 unload_nls(sbi->nls_tab);
327 sbi->nls_tab = nls_map;
332 if (nls_map && nls_map != (void *) -1)
337 static int jfs_remount(struct super_block *sb, int *flags, char *data)
341 int flag = JFS_SBI(sb)->flag;
343 if (!parse_options(data, sb, &newLVSize, &flag)) {
347 if (sb->s_flags & MS_RDONLY) {
349 "JFS: resize requires volume to be mounted read-write\n");
352 rc = jfs_extendfs(sb, newLVSize, 0);
357 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
359 * Invalidate any previously read metadata. fsck may have
360 * changed the on-disk data since we mounted r/o
362 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
364 JFS_SBI(sb)->flag = flag;
365 return jfs_mount_rw(sb, 1);
367 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
368 rc = jfs_umount_rw(sb);
369 JFS_SBI(sb)->flag = flag;
372 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
373 if (!(sb->s_flags & MS_RDONLY)) {
374 rc = jfs_umount_rw(sb);
377 JFS_SBI(sb)->flag = flag;
378 return jfs_mount_rw(sb, 1);
380 JFS_SBI(sb)->flag = flag;
385 static int jfs_fill_super(struct super_block *sb, void *data, int silent)
387 struct jfs_sb_info *sbi;
393 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
395 if (!new_valid_dev(sb->s_bdev->bd_dev))
398 sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
401 memset(sbi, 0, sizeof (struct jfs_sb_info));
405 /* initialize the mount flag and determine the default error handler */
406 flag = JFS_ERR_REMOUNT_RO;
408 if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
414 #ifdef CONFIG_JFS_POSIX_ACL
415 sb->s_flags |= MS_POSIXACL;
419 printk(KERN_ERR "resize option for remount only\n");
424 * Initialize blocksize to 4K.
426 sb_set_blocksize(sb, PSIZE);
429 * Set method vectors.
431 sb->s_op = &jfs_super_operations;
432 sb->s_export_op = &jfs_export_operations;
435 * Initialize direct-mapping inode/address-space
437 inode = new_inode(sb);
442 inode->i_size = sb->s_bdev->bd_inode->i_size;
443 inode->i_mapping->a_ops = &jfs_metapage_aops;
444 insert_inode_hash(inode);
445 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
447 sbi->direct_inode = inode;
452 jfs_err("jfs_mount failed w/return code = %d", rc);
454 goto out_mount_failed;
456 if (sb->s_flags & MS_RDONLY)
459 rc = jfs_mount_rw(sb, 0);
462 jfs_err("jfs_mount_rw failed, return code = %d",
469 sb->s_magic = JFS_SUPER_MAGIC;
471 inode = iget(sb, ROOT_I);
472 if (!inode || is_bad_inode(inode))
474 sb->s_root = d_alloc_root(inode);
478 if (sbi->mntflag & JFS_OS2)
479 sb->s_root->d_op = &jfs_ci_dentry_operations;
481 /* logical blocks are represented by 40 bits in pxd_t, etc. */
482 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
483 #if BITS_PER_LONG == 32
485 * Page cache is indexed by long.
486 * I would use MAX_LFS_FILESIZE, but it's only half as big
488 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
494 jfs_err("jfs_read_super: get root inode failed");
501 jfs_err("jfs_umount failed with return code %d", rc);
504 filemap_write_and_wait(sbi->direct_inode->i_mapping);
505 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
506 make_bad_inode(sbi->direct_inode);
507 iput(sbi->direct_inode);
508 sbi->direct_inode = NULL;
511 unload_nls(sbi->nls_tab);
516 static void jfs_write_super_lockfs(struct super_block *sb)
518 struct jfs_sb_info *sbi = JFS_SBI(sb);
519 struct jfs_log *log = sbi->log;
521 if (!(sb->s_flags & MS_RDONLY)) {
524 updateSuper(sb, FM_CLEAN);
528 static void jfs_unlockfs(struct super_block *sb)
530 struct jfs_sb_info *sbi = JFS_SBI(sb);
531 struct jfs_log *log = sbi->log;
534 if (!(sb->s_flags & MS_RDONLY)) {
535 updateSuper(sb, FM_MOUNT);
536 if ((rc = lmLogInit(log)))
537 jfs_err("jfs_unlock failed with return code %d", rc);
543 static struct super_block *jfs_get_sb(struct file_system_type *fs_type,
544 int flags, const char *dev_name, void *data)
546 return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
549 static int jfs_sync_fs(struct super_block *sb, int wait)
551 struct jfs_log *log = JFS_SBI(sb)->log;
553 /* log == NULL indicates read-only mount */
555 jfs_flush_journal(log, wait);
562 static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
564 struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb);
566 if (sbi->flag & JFS_NOINTEGRITY)
567 seq_puts(seq, ",nointegrity");
569 seq_puts(seq, ",integrity");
571 #if defined(CONFIG_QUOTA)
572 if (sbi->flag & JFS_USRQUOTA)
573 seq_puts(seq, ",usrquota");
575 if (sbi->flag & JFS_GRPQUOTA)
576 seq_puts(seq, ",grpquota");
582 static struct super_operations jfs_super_operations = {
583 .alloc_inode = jfs_alloc_inode,
584 .destroy_inode = jfs_destroy_inode,
585 .read_inode = jfs_read_inode,
586 .dirty_inode = jfs_dirty_inode,
587 .write_inode = jfs_write_inode,
588 .delete_inode = jfs_delete_inode,
589 .put_super = jfs_put_super,
590 .sync_fs = jfs_sync_fs,
591 .write_super_lockfs = jfs_write_super_lockfs,
592 .unlockfs = jfs_unlockfs,
593 .statfs = jfs_statfs,
594 .remount_fs = jfs_remount,
595 .show_options = jfs_show_options
598 static struct export_operations jfs_export_operations = {
599 .get_parent = jfs_get_parent,
602 static struct file_system_type jfs_fs_type = {
603 .owner = THIS_MODULE,
605 .get_sb = jfs_get_sb,
606 .kill_sb = kill_block_super,
607 .fs_flags = FS_REQUIRES_DEV,
610 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
612 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
614 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
615 SLAB_CTOR_CONSTRUCTOR) {
616 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
617 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
618 init_rwsem(&jfs_ip->rdwrlock);
619 mutex_init(&jfs_ip->commit_mutex);
620 init_rwsem(&jfs_ip->xattr_sem);
621 spin_lock_init(&jfs_ip->ag_lock);
622 jfs_ip->active_ag = -1;
623 #ifdef CONFIG_JFS_POSIX_ACL
624 jfs_ip->i_acl = JFS_ACL_NOT_CACHED;
625 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED;
627 inode_init_once(&jfs_ip->vfs_inode);
631 static int __init init_jfs_fs(void)
637 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
638 SLAB_RECLAIM_ACCOUNT, init_once, NULL);
639 if (jfs_inode_cachep == NULL)
643 * Metapage initialization
645 rc = metapage_init();
647 jfs_err("metapage_init failed w/rc = %d", rc);
652 * Transaction Manager initialization
656 jfs_err("txInit failed w/rc = %d", rc);
661 * I/O completion thread (endio)
663 jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
664 if (IS_ERR(jfsIOthread)) {
665 rc = PTR_ERR(jfsIOthread);
666 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
670 if (commit_threads < 1)
671 commit_threads = num_online_cpus();
672 if (commit_threads > MAX_COMMIT_THREADS)
673 commit_threads = MAX_COMMIT_THREADS;
675 for (i = 0; i < commit_threads; i++) {
676 jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit");
677 if (IS_ERR(jfsCommitThread[i])) {
678 rc = PTR_ERR(jfsCommitThread[i]);
679 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
681 goto kill_committask;
685 jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
686 if (IS_ERR(jfsSyncThread)) {
687 rc = PTR_ERR(jfsSyncThread);
688 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
689 goto kill_committask;
696 return register_filesystem(&jfs_fs_type);
699 for (i = 0; i < commit_threads; i++)
700 kthread_stop(jfsCommitThread[i]);
701 kthread_stop(jfsIOthread);
707 kmem_cache_destroy(jfs_inode_cachep);
711 static void __exit exit_jfs_fs(void)
715 jfs_info("exit_jfs_fs called");
720 kthread_stop(jfsIOthread);
721 for (i = 0; i < commit_threads; i++)
722 kthread_stop(jfsCommitThread[i]);
723 kthread_stop(jfsSyncThread);
727 unregister_filesystem(&jfs_fs_type);
728 kmem_cache_destroy(jfs_inode_cachep);
731 module_init(init_jfs_fs)
732 module_exit(exit_jfs_fs)