Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 700 insertions, 0 deletions

diff --git a/fs/jfs/super.c b/fs/jfs/super.c
new file mode 100644
index 000000000000..5856866e24fc
--- /dev/null
+++ b/fs/jfs/super.c
@@ -0,0 +1,700 @@
+/*
+ *   Copyright (C) International Business Machines Corp., 2000-2004
+ *   Portions Copyright (C) Christoph Hellwig, 2001-2002
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or 
+ *   (at your option) any later version.
+ * 
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program;  if not, write to the Free Software 
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/fs.h>
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/parser.h>
+#include <linux/completion.h>
+#include <linux/vfs.h>
+#include <linux/moduleparam.h>
+#include <asm/uaccess.h>
+
+#include "jfs_incore.h"
+#include "jfs_filsys.h"
+#include "jfs_metapage.h"
+#include "jfs_superblock.h"
+#include "jfs_dmap.h"
+#include "jfs_imap.h"
+#include "jfs_acl.h"
+#include "jfs_debug.h"
+
+MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
+MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
+MODULE_LICENSE("GPL");
+
+static kmem_cache_t * jfs_inode_cachep;
+
+static struct super_operations jfs_super_operations;
+static struct export_operations jfs_export_operations;
+static struct file_system_type jfs_fs_type;
+
+#define MAX_COMMIT_THREADS 64
+static int commit_threads = 0;
+module_param(commit_threads, int, 0);
+MODULE_PARM_DESC(commit_threads, "Number of commit threads");
+
+int jfs_stop_threads;
+static pid_t jfsIOthread;
+static pid_t jfsCommitThread[MAX_COMMIT_THREADS];
+static pid_t jfsSyncThread;
+DECLARE_COMPLETION(jfsIOwait);
+
+#ifdef CONFIG_JFS_DEBUG
+int jfsloglevel = JFS_LOGLEVEL_WARN;
+module_param(jfsloglevel, int, 0644);
+MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
+#endif
+
+/*
+ * External declarations
+ */
+extern int jfs_mount(struct super_block *);
+extern int jfs_mount_rw(struct super_block *, int);
+extern int jfs_umount(struct super_block *);
+extern int jfs_umount_rw(struct super_block *);
+
+extern int jfsIOWait(void *);
+extern int jfs_lazycommit(void *);
+extern int jfs_sync(void *);
+
+extern void jfs_read_inode(struct inode *inode);
+extern void jfs_dirty_inode(struct inode *inode);
+extern void jfs_delete_inode(struct inode *inode);
+extern int jfs_write_inode(struct inode *inode, int wait);
+
+extern struct dentry *jfs_get_parent(struct dentry *dentry);
+extern int jfs_extendfs(struct super_block *, s64, int);
+
+extern struct dentry_operations jfs_ci_dentry_operations;
+
+#ifdef PROC_FS_JFS              /* see jfs_debug.h */
+extern void jfs_proc_init(void);
+extern void jfs_proc_clean(void);
+#endif
+
+extern wait_queue_head_t jfs_IO_thread_wait;
+extern wait_queue_head_t jfs_commit_thread_wait;
+extern wait_queue_head_t jfs_sync_thread_wait;
+
+static void jfs_handle_error(struct super_block *sb)
+{
+        struct jfs_sb_info *sbi = JFS_SBI(sb);
+
+        if (sb->s_flags & MS_RDONLY)
+                return;
+
+        updateSuper(sb, FM_DIRTY);
+
+        if (sbi->flag & JFS_ERR_PANIC)
+                panic("JFS (device %s): panic forced after error\n",
+                        sb->s_id);
+        else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
+                jfs_err("ERROR: (device %s): remounting filesystem "
+                        "as read-only\n",
+                        sb->s_id);
+                sb->s_flags |= MS_RDONLY;
+        } 
+
+        /* nothing is done for continue beyond marking the superblock dirty */
+}
+
+void jfs_error(struct super_block *sb, const char * function, ...)
+{
+        static char error_buf[256];
+        va_list args;
+
+        va_start(args, function);
+        vsprintf(error_buf, function, args);
+        va_end(args);
+
+        printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf);
+
+        jfs_handle_error(sb);
+}
+
+static struct inode *jfs_alloc_inode(struct super_block *sb)
+{
+        struct jfs_inode_info *jfs_inode;
+
+        jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
+        if (!jfs_inode)
+                return NULL;
+        return &jfs_inode->vfs_inode;
+}
+
+static void jfs_destroy_inode(struct inode *inode)
+{
+        struct jfs_inode_info *ji = JFS_IP(inode);
+
+        spin_lock_irq(&ji->ag_lock);
+        if (ji->active_ag != -1) {
+                struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
+                atomic_dec(&bmap->db_active[ji->active_ag]);
+                ji->active_ag = -1;
+        }
+        spin_unlock_irq(&ji->ag_lock);
+
+#ifdef CONFIG_JFS_POSIX_ACL
+        if (ji->i_acl != JFS_ACL_NOT_CACHED) {
+                posix_acl_release(ji->i_acl);
+                ji->i_acl = JFS_ACL_NOT_CACHED;
+        }
+        if (ji->i_default_acl != JFS_ACL_NOT_CACHED) {
+                posix_acl_release(ji->i_default_acl);
+                ji->i_default_acl = JFS_ACL_NOT_CACHED;
+        }
+#endif
+
+        kmem_cache_free(jfs_inode_cachep, ji);
+}
+
+static int jfs_statfs(struct super_block *sb, struct kstatfs *buf)
+{
+        struct jfs_sb_info *sbi = JFS_SBI(sb);
+        s64 maxinodes;
+        struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
+
+        jfs_info("In jfs_statfs");
+        buf->f_type = JFS_SUPER_MAGIC;
+        buf->f_bsize = sbi->bsize;
+        buf->f_blocks = sbi->bmap->db_mapsize;
+        buf->f_bfree = sbi->bmap->db_nfree;
+        buf->f_bavail = sbi->bmap->db_nfree;
+        /*
+         * If we really return the number of allocated & free inodes, some
+         * applications will fail because they won't see enough free inodes.
+         * We'll try to calculate some guess as to how may inodes we can
+         * really allocate
+         *
+         * buf->f_files = atomic_read(&imap->im_numinos);
+         * buf->f_ffree = atomic_read(&imap->im_numfree);
+         */
+        maxinodes = min((s64) atomic_read(&imap->im_numinos) +
+                        ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
+                         << L2INOSPEREXT), (s64) 0xffffffffLL);
+        buf->f_files = maxinodes;
+        buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
+                                    atomic_read(&imap->im_numfree));
+
+        buf->f_namelen = JFS_NAME_MAX;
+        return 0;
+}
+
+static void jfs_put_super(struct super_block *sb)
+{
+        struct jfs_sb_info *sbi = JFS_SBI(sb);
+        int rc;
+
+        jfs_info("In jfs_put_super");
+        rc = jfs_umount(sb);
+        if (rc)
+                jfs_err("jfs_umount failed with return code %d", rc);
+        if (sbi->nls_tab)
+                unload_nls(sbi->nls_tab);
+        sbi->nls_tab = NULL;
+
+        kfree(sbi);
+}
+
+enum {
+        Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
+        Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err,
+};
+
+static match_table_t tokens = {
+        {Opt_integrity, "integrity"},
+        {Opt_nointegrity, "nointegrity"},
+        {Opt_iocharset, "iocharset=%s"},
+        {Opt_resize, "resize=%u"},
+        {Opt_resize_nosize, "resize"},
+        {Opt_errors, "errors=%s"},
+        {Opt_ignore, "noquota"},
+        {Opt_ignore, "quota"},
+        {Opt_ignore, "usrquota"},
+        {Opt_ignore, "grpquota"},
+        {Opt_err, NULL}
+};
+
+static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
+                         int *flag)
+{
+        void *nls_map = (void *)-1;     /* -1: no change;  NULL: none */
+        char *p;
+        struct jfs_sb_info *sbi = JFS_SBI(sb);
+
+        *newLVSize = 0;
+
+        if (!options)
+                return 1;
+
+        while ((p = strsep(&options, ",")) != NULL) {
+                substring_t args[MAX_OPT_ARGS];
+                int token;
+                if (!*p)
+                        continue;
+
+                token = match_token(p, tokens, args);
+                switch (token) {
+                case Opt_integrity:
+                        *flag &= ~JFS_NOINTEGRITY;
+                        break;
+                case Opt_nointegrity:
+                        *flag |= JFS_NOINTEGRITY;
+                        break;
+                case Opt_ignore:
+                        /* Silently ignore the quota options */
+                        /* Don't do anything ;-) */
+                        break;
+                case Opt_iocharset:
+                        if (nls_map && nls_map != (void *) -1)
+                                unload_nls(nls_map);
+                        if (!strcmp(args[0].from, "none"))
+                                nls_map = NULL;
+                        else {
+                                nls_map = load_nls(args[0].from);
+                                if (!nls_map) {
+                                        printk(KERN_ERR
+                                               "JFS: charset not found\n");
+                                        goto cleanup;
+                                }
+                        }
+                        break;
+                case Opt_resize:
+                {
+                        char *resize = args[0].from;
+                        *newLVSize = simple_strtoull(resize, &resize, 0);
+                        break;
+                }
+                case Opt_resize_nosize:
+                {
+                        *newLVSize = sb->s_bdev->bd_inode->i_size >>
+                                sb->s_blocksize_bits;
+                        if (*newLVSize == 0)
+                                printk(KERN_ERR
+                                       "JFS: Cannot determine volume size\n");
+                        break;
+                }
+                case Opt_errors:
+                {
+                        char *errors = args[0].from;
+                        if (!errors || !*errors)
+                                goto cleanup;
+                        if (!strcmp(errors, "continue")) {
+                                *flag &= ~JFS_ERR_REMOUNT_RO;
+                                *flag &= ~JFS_ERR_PANIC;
+                                *flag |= JFS_ERR_CONTINUE;
+                        } else if (!strcmp(errors, "remount-ro")) {
+                                *flag &= ~JFS_ERR_CONTINUE;
+                                *flag &= ~JFS_ERR_PANIC;
+                                *flag |= JFS_ERR_REMOUNT_RO;
+                        } else if (!strcmp(errors, "panic")) {
+                                *flag &= ~JFS_ERR_CONTINUE;
+                                *flag &= ~JFS_ERR_REMOUNT_RO;
+                                *flag |= JFS_ERR_PANIC;
+                        } else {
+                                printk(KERN_ERR
+                                       "JFS: %s is an invalid error handler\n",
+                                       errors);
+                                goto cleanup;
+                        }
+                        break;
+                }
+                default:
+                        printk("jfs: Unrecognized mount option \"%s\" "
+                                        " or missing value\n", p);
+                        goto cleanup;
+                }
+        }
+
+        if (nls_map != (void *) -1) {
+                /* Discard old (if remount) */
+                if (sbi->nls_tab)
+                        unload_nls(sbi->nls_tab);
+                sbi->nls_tab = nls_map;
+        }
+        return 1;
+
+cleanup:
+        if (nls_map && nls_map != (void *) -1)
+                unload_nls(nls_map);
+        return 0;
+}
+
+static int jfs_remount(struct super_block *sb, int *flags, char *data)
+{
+        s64 newLVSize = 0;
+        int rc = 0;
+        int flag = JFS_SBI(sb)->flag;
+
+        if (!parse_options(data, sb, &newLVSize, &flag)) {
+                return -EINVAL;
+        }
+        if (newLVSize) {
+                if (sb->s_flags & MS_RDONLY) {
+                        printk(KERN_ERR
+                  "JFS: resize requires volume to be mounted read-write\n");
+                        return -EROFS;
+                }
+                rc = jfs_extendfs(sb, newLVSize, 0);
+                if (rc)
+                        return rc;
+        }
+
+        if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
+                JFS_SBI(sb)->flag = flag;
+                return jfs_mount_rw(sb, 1);
+        }
+        if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
+                rc = jfs_umount_rw(sb);
+                JFS_SBI(sb)->flag = flag;
+                return rc;
+        }
+        if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
+                if (!(sb->s_flags & MS_RDONLY)) {
+                        rc = jfs_umount_rw(sb);
+                        if (rc)
+                                return rc;
+                        JFS_SBI(sb)->flag = flag;
+                        return jfs_mount_rw(sb, 1);
+                }
+        JFS_SBI(sb)->flag = flag;
+
+        return 0;
+}
+
+static int jfs_fill_super(struct super_block *sb, void *data, int silent)
+{
+        struct jfs_sb_info *sbi;
+        struct inode *inode;
+        int rc;
+        s64 newLVSize = 0;
+        int flag;
+
+        jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
+
+        if (!new_valid_dev(sb->s_bdev->bd_dev))
+                return -EOVERFLOW;
+
+        sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
+        if (!sbi)
+                return -ENOSPC;
+        memset(sbi, 0, sizeof (struct jfs_sb_info));
+        sb->s_fs_info = sbi;
+        sbi->sb = sb;
+
+        /* initialize the mount flag and determine the default error handler */
+        flag = JFS_ERR_REMOUNT_RO;
+
+        if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
+                kfree(sbi);
+                return -EINVAL;
+        }
+        sbi->flag = flag;
+
+#ifdef CONFIG_JFS_POSIX_ACL
+        sb->s_flags |= MS_POSIXACL;
+#endif
+
+        if (newLVSize) {
+                printk(KERN_ERR "resize option for remount only\n");
+                return -EINVAL;
+        }
+
+        /*
+         * Initialize blocksize to 4K.
+         */
+        sb_set_blocksize(sb, PSIZE);
+
+        /*
+         * Set method vectors.
+         */
+        sb->s_op = &jfs_super_operations;
+        sb->s_export_op = &jfs_export_operations;
+
+        rc = jfs_mount(sb);
+        if (rc) {
+                if (!silent) {
+                        jfs_err("jfs_mount failed w/return code = %d", rc);
+                }
+                goto out_kfree;
+        }
+        if (sb->s_flags & MS_RDONLY)
+                sbi->log = NULL;
+        else {
+                rc = jfs_mount_rw(sb, 0);
+                if (rc) {
+                        if (!silent) {
+                                jfs_err("jfs_mount_rw failed, return code = %d",
+                                        rc);
+                        }
+                        goto out_no_rw;
+                }
+        }
+
+        sb->s_magic = JFS_SUPER_MAGIC;
+
+        inode = iget(sb, ROOT_I);
+        if (!inode || is_bad_inode(inode))
+                goto out_no_root;
+        sb->s_root = d_alloc_root(inode);
+        if (!sb->s_root)
+                goto out_no_root;
+
+        if (sbi->mntflag & JFS_OS2)
+                sb->s_root->d_op = &jfs_ci_dentry_operations;
+
+        /* logical blocks are represented by 40 bits in pxd_t, etc. */
+        sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
+#if BITS_PER_LONG == 32
+        /*
+         * Page cache is indexed by long.
+         * I would use MAX_LFS_FILESIZE, but it's only half as big
+         */
+        sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
+#endif
+        sb->s_time_gran = 1;
+        return 0;
+
+out_no_root:
+        jfs_err("jfs_read_super: get root inode failed");
+        if (inode)
+                iput(inode);
+
+out_no_rw:
+        rc = jfs_umount(sb);
+        if (rc) {
+                jfs_err("jfs_umount failed with return code %d", rc);
+        }
+out_kfree:
+        if (sbi->nls_tab)
+                unload_nls(sbi->nls_tab);
+        kfree(sbi);
+        return -EINVAL;
+}
+
+static void jfs_write_super_lockfs(struct super_block *sb)
+{
+        struct jfs_sb_info *sbi = JFS_SBI(sb);
+        struct jfs_log *log = sbi->log;
+
+        if (!(sb->s_flags & MS_RDONLY)) {
+                txQuiesce(sb);
+                lmLogShutdown(log);
+                updateSuper(sb, FM_CLEAN);
+        }
+}
+
+static void jfs_unlockfs(struct super_block *sb)
+{
+        struct jfs_sb_info *sbi = JFS_SBI(sb);
+        struct jfs_log *log = sbi->log;
+        int rc = 0;
+
+        if (!(sb->s_flags & MS_RDONLY)) {
+                updateSuper(sb, FM_MOUNT);
+                if ((rc = lmLogInit(log)))
+                        jfs_err("jfs_unlock failed with return code %d", rc);
+                else
+                        txResume(sb);
+        }
+}
+
+static struct super_block *jfs_get_sb(struct file_system_type *fs_type, 
+        int flags, const char *dev_name, void *data)
+{
+        return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
+}
+
+static int jfs_sync_fs(struct super_block *sb, int wait)
+{
+        struct jfs_log *log = JFS_SBI(sb)->log;
+
+        /* log == NULL indicates read-only mount */
+        if (log)
+                jfs_flush_journal(log, wait);
+
+        return 0;
+}
+
+static struct super_operations jfs_super_operations = {
+        .alloc_inode    = jfs_alloc_inode,
+        .destroy_inode  = jfs_destroy_inode,
+        .read_inode     = jfs_read_inode,
+        .dirty_inode    = jfs_dirty_inode,
+        .write_inode    = jfs_write_inode,
+        .delete_inode   = jfs_delete_inode,
+        .put_super      = jfs_put_super,
+        .sync_fs        = jfs_sync_fs,
+        .write_super_lockfs = jfs_write_super_lockfs,
+        .unlockfs       = jfs_unlockfs,
+        .statfs         = jfs_statfs,
+        .remount_fs     = jfs_remount,
+};
+
+static struct export_operations jfs_export_operations = {
+        .get_parent     = jfs_get_parent,
+};
+
+static struct file_system_type jfs_fs_type = {
+        .owner          = THIS_MODULE,
+        .name           = "jfs",
+        .get_sb         = jfs_get_sb,
+        .kill_sb        = kill_block_super,
+        .fs_flags       = FS_REQUIRES_DEV,
+};
+
+extern int metapage_init(void);
+extern int txInit(void);
+extern void txExit(void);
+extern void metapage_exit(void);
+
+static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
+{
+        struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
+
+        if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
+            SLAB_CTOR_CONSTRUCTOR) {
+                memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
+                INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
+                init_rwsem(&jfs_ip->rdwrlock);
+                init_MUTEX(&jfs_ip->commit_sem);
+                init_rwsem(&jfs_ip->xattr_sem);
+                spin_lock_init(&jfs_ip->ag_lock);
+                jfs_ip->active_ag = -1;
+#ifdef CONFIG_JFS_POSIX_ACL
+                jfs_ip->i_acl = JFS_ACL_NOT_CACHED;
+                jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED;
+#endif
+                inode_init_once(&jfs_ip->vfs_inode);
+        }
+}
+
+static int __init init_jfs_fs(void)
+{
+        int i;
+        int rc;
+
+        jfs_inode_cachep =
+            kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, 
+                            SLAB_RECLAIM_ACCOUNT, init_once, NULL);
+        if (jfs_inode_cachep == NULL)
+                return -ENOMEM;
+
+        /*
+         * Metapage initialization
+         */
+        rc = metapage_init();
+        if (rc) {
+                jfs_err("metapage_init failed w/rc = %d", rc);
+                goto free_slab;
+        }
+
+        /*
+         * Transaction Manager initialization
+         */
+        rc = txInit();
+        if (rc) {
+                jfs_err("txInit failed w/rc = %d", rc);
+                goto free_metapage;
+        }
+
+        /*
+         * I/O completion thread (endio)
+         */
+        jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL);
+        if (jfsIOthread < 0) {
+                jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread);
+                goto end_txmngr;
+        }
+        wait_for_completion(&jfsIOwait);        /* Wait until thread starts */
+
+        if (commit_threads < 1)
+                commit_threads = num_online_cpus();
+        if (commit_threads > MAX_COMMIT_THREADS)
+                commit_threads = MAX_COMMIT_THREADS;
+
+        for (i = 0; i < commit_threads; i++) {
+                jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL,
+                                                   CLONE_KERNEL);
+                if (jfsCommitThread[i] < 0) {
+                        jfs_err("init_jfs_fs: fork failed w/rc = %d",
+                                jfsCommitThread[i]);
+                        commit_threads = i;
+                        goto kill_committask;
+                }
+                /* Wait until thread starts */
+                wait_for_completion(&jfsIOwait);
+        }
+
+        jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL);
+        if (jfsSyncThread < 0) {
+                jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread);
+                goto kill_committask;
+        }
+        wait_for_completion(&jfsIOwait);        /* Wait until thread starts */
+
+#ifdef PROC_FS_JFS
+        jfs_proc_init();
+#endif
+
+        return register_filesystem(&jfs_fs_type);
+
+kill_committask:
+        jfs_stop_threads = 1;
+        wake_up_all(&jfs_commit_thread_wait);
+        for (i = 0; i < commit_threads; i++)
+                wait_for_completion(&jfsIOwait);
+
+        wake_up(&jfs_IO_thread_wait);
+        wait_for_completion(&jfsIOwait);        /* Wait for thread exit */
+end_txmngr:
+        txExit();
+free_metapage:
+        metapage_exit();
+free_slab:
+        kmem_cache_destroy(jfs_inode_cachep);
+        return rc;
+}
+
+static void __exit exit_jfs_fs(void)
+{
+        int i;
+
+        jfs_info("exit_jfs_fs called");
+
+        jfs_stop_threads = 1;
+        txExit();
+        metapage_exit();
+        wake_up(&jfs_IO_thread_wait);
+        wait_for_completion(&jfsIOwait);        /* Wait until IO thread exits */
+        wake_up_all(&jfs_commit_thread_wait);
+        for (i = 0; i < commit_threads; i++)
+                wait_for_completion(&jfsIOwait);
+        wake_up(&jfs_sync_thread_wait);
+        wait_for_completion(&jfsIOwait);        /* Wait until Sync thread exits */
+#ifdef PROC_FS_JFS
+        jfs_proc_clean();
+#endif
+        unregister_filesystem(&jfs_fs_type);
+        kmem_cache_destroy(jfs_inode_cachep);
+}
+
+module_init(init_jfs_fs)
+module_exit(exit_jfs_fs)