// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright ( C ) International Business Machines Corp . , 2000 - 2004
*/
/*
* 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 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
*/
if (ipaimap2) {
diUnmount(ipaimap2, 0 );
diFreeSpecial(ipaimap2);
sbi->ipaimap2 = NULL;
}
/*
* close aggregate inode allocation map
*/
diUnmount(ipaimap, 0 );
diFreeSpecial(ipaimap);
sbi->ipaimap = NULL;
/*
* close aggregate block allocation map
*/
dbUnmount(ipbmap, 0 );
diFreeSpecial(ipbmap);
sbi->ipbmap = NULL;
/*
* Make sure all metadata makes it to disk before we mark
* the superblock as clean
*/
filemap_write_and_wait(sbi->direct_inode->i_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);
/*
* 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 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_write_and_wait(sbi->direct_inode->i_mapping);
updateSuper(sb, FM_CLEAN);
return lmLogClose(sb);
}
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(vorverarbeitet am 2026-09-29)
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