diff options
Diffstat (limited to 'fs/jfs/jfs_umount.c')
| -rw-r--r-- | fs/jfs/jfs_umount.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/fs/jfs/jfs_umount.c b/fs/jfs/jfs_umount.c new file mode 100644 index 00000000000..f31a9e3f3fe --- /dev/null +++ b/fs/jfs/jfs_umount.c @@ -0,0 +1,178 @@ +/* + * 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); +} |