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/*
* Copyright (C) International Business Machines Corp., 2000-2004
*
* 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
*/
/*
* jfs_umount.c
*
* note: file system in transition to aggregate/fileset:
* (ref. jfs_mount.c)
*
* file system unmount is interpreted as mount of the single/only
* fileset in the aggregate and, if unmount of the last fileset,
* as unmount of the aggerate;
*/
#include <linux/fs.h>
#include "jfs_incore.h"
#include "jfs_filsys.h"
#include "jfs_superblock.h"
#include "jfs_dmap.h"
#include "jfs_imap.h"
#include "jfs_metapage.h"
#include "jfs_debug.h"
/*
* NAME: jfs_umount(vfsp, flags, crp)
*
* FUNCTION: vfs_umount()
*
* PARAMETERS: vfsp - virtual file system pointer
* flags - unmount for shutdown
* crp - credential
*
* RETURN : EBUSY - device has open files
*/
int jfs_umount(struct super_block *sb)
{
struct address_space *bdev_mapping = sb->s_bdev->bd_inode->i_mapping;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipbmap = sbi->ipbmap;
struct inode *ipimap = sbi->ipimap;
struct inode *ipaimap = sbi->ipaimap;
struct inode *ipaimap2 = sbi->ipaimap2;
struct jfs_log *log;
int rc = 0;
jfs_info("UnMount JFS: sb:0x%p", sb);
/*
* update superblock and close log
*
* if mounted read-write and log based recovery was enabled
*/
if ((log = sbi->log))
/*
* Wait for outstanding transactions to be written to log:
*/
jfs_flush_journal(log, 2);
/*
* close fileset inode allocation map (aka fileset inode)
*/
diUnmount(ipimap, 0);
diFreeSpecial(ipimap);
sbi->ipimap = NULL;
/*
* close secondary aggregate inode allocation map
*/
ipaimap2 = sbi->ipaimap2;
if (ipaimap2) {
diUnmount(ipaimap2, 0);
diFreeSpecial(ipaimap2);
sbi->ipaimap2 = NULL;
}
/*
* close aggregate inode allocation map
*/
ipaimap = sbi->ipaimap;
diUnmount(ipaimap, 0);
diFreeSpecial(ipaimap);
sbi->ipaimap = NULL;
/*
* close aggregate block allocation map
*/
dbUnmount(ipbmap, 0);
diFreeSpecial(ipbmap);
sbi->ipimap = NULL;
/*
* Make sure all metadata makes it to disk before we mark
* the superblock as clean
*/
filemap_fdatawrite(bdev_mapping);
filemap_fdatawait(bdev_mapping);
/*
* ensure all file system file pages are propagated to their
* home blocks on disk (and their in-memory buffer pages are
* invalidated) BEFORE updating file system superblock state
* (to signify file system is unmounted cleanly, and thus in
* consistent state) and log superblock active file system
* list (to signify skip logredo()).
*/
if (log) { /* log = NULL if read-only mount */
updateSuper(sb, FM_CLEAN);
/* Restore default gfp_mask for bdev */
mapping_set_gfp_mask(bdev_mapping, GFP_USER);
/*
* close log:
*
* remove file system from log active file system list.
*/
rc = lmLogClose(sb);
}
jfs_info("UnMount JFS Complete: rc = %d", rc);
return rc;
}
int jfs_umount_rw(struct super_block *sb)
{
struct address_space *bdev_mapping = sb->s_bdev->bd_inode->i_mapping;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct jfs_log *log = sbi->log;
if (!log)
return 0;
/*
* close log:
*
* remove file system from log active file system list.
*/
jfs_flush_journal(log, 2);
/*
* Make sure all metadata makes it to disk
*/
dbSync(sbi->ipbmap);
diSync(sbi->ipimap);
/*
* Note that we have to do this even if sync_blockdev() will
* do exactly the same a few instructions later: We can't
* mark the superblock clean before everything is flushed to
* disk.
*/
filemap_fdatawrite(bdev_mapping);
filemap_fdatawait(bdev_mapping);
updateSuper(sb, FM_CLEAN);
/* Restore default gfp_mask for bdev */
mapping_set_gfp_mask(bdev_mapping, GFP_USER);
return lmLogClose(sb);
}
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