168 lines
4 KiB
C
168 lines
4 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2000-2004
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* jfs_umount.c
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*
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* note: file system in transition to aggregate/fileset:
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* (ref. jfs_mount.c)
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*
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* file system unmount is interpreted as mount of the single/only
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* fileset in the aggregate and, if unmount of the last fileset,
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* as unmount of the aggerate;
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*/
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#include <linux/fs.h>
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#include "jfs_incore.h"
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#include "jfs_filsys.h"
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#include "jfs_superblock.h"
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#include "jfs_dmap.h"
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#include "jfs_imap.h"
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#include "jfs_metapage.h"
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#include "jfs_debug.h"
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/*
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* NAME: jfs_umount(vfsp, flags, crp)
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*
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* FUNCTION: vfs_umount()
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*
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* PARAMETERS: vfsp - virtual file system pointer
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* flags - unmount for shutdown
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* crp - credential
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*
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* RETURN : EBUSY - device has open files
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*/
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int jfs_umount(struct super_block *sb)
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{
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struct jfs_sb_info *sbi = JFS_SBI(sb);
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struct inode *ipbmap = sbi->ipbmap;
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struct inode *ipimap = sbi->ipimap;
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struct inode *ipaimap = sbi->ipaimap;
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struct inode *ipaimap2 = sbi->ipaimap2;
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struct jfs_log *log;
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int rc = 0;
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jfs_info("UnMount JFS: sb:0x%p", sb);
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/*
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* update superblock and close log
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*
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* if mounted read-write and log based recovery was enabled
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*/
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if ((log = sbi->log))
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/*
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* Wait for outstanding transactions to be written to log:
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*/
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jfs_flush_journal(log, 2);
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/*
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* close fileset inode allocation map (aka fileset inode)
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*/
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diUnmount(ipimap, 0);
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diFreeSpecial(ipimap);
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sbi->ipimap = NULL;
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/*
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* close secondary aggregate inode allocation map
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*/
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ipaimap2 = sbi->ipaimap2;
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if (ipaimap2) {
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diUnmount(ipaimap2, 0);
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diFreeSpecial(ipaimap2);
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sbi->ipaimap2 = NULL;
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}
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/*
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* close aggregate inode allocation map
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*/
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ipaimap = sbi->ipaimap;
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diUnmount(ipaimap, 0);
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diFreeSpecial(ipaimap);
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sbi->ipaimap = NULL;
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/*
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* close aggregate block allocation map
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*/
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dbUnmount(ipbmap, 0);
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diFreeSpecial(ipbmap);
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sbi->ipimap = NULL;
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/*
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* Make sure all metadata makes it to disk before we mark
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* the superblock as clean
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*/
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filemap_write_and_wait(sbi->direct_inode->i_mapping);
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/*
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* ensure all file system file pages are propagated to their
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* home blocks on disk (and their in-memory buffer pages are
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* invalidated) BEFORE updating file system superblock state
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* (to signify file system is unmounted cleanly, and thus in
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* consistent state) and log superblock active file system
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* list (to signify skip logredo()).
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*/
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if (log) { /* log = NULL if read-only mount */
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updateSuper(sb, FM_CLEAN);
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/*
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* close log:
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*
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* remove file system from log active file system list.
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*/
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rc = lmLogClose(sb);
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}
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jfs_info("UnMount JFS Complete: rc = %d", rc);
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return rc;
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}
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int jfs_umount_rw(struct super_block *sb)
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{
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struct jfs_sb_info *sbi = JFS_SBI(sb);
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struct jfs_log *log = sbi->log;
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if (!log)
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return 0;
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/*
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* close log:
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*
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* remove file system from log active file system list.
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*/
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jfs_flush_journal(log, 2);
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/*
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* Make sure all metadata makes it to disk
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*/
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dbSync(sbi->ipbmap);
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diSync(sbi->ipimap);
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/*
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* Note that we have to do this even if sync_blockdev() will
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* do exactly the same a few instructions later: We can't
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* mark the superblock clean before everything is flushed to
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* disk.
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*/
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filemap_write_and_wait(sbi->direct_inode->i_mapping);
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updateSuper(sb, FM_CLEAN);
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return lmLogClose(sb);
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}
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