1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) International Business Machines Corp., 2000-2004
9 * note: file system in transition to aggregate/fileset:
12 * file system unmount is interpreted as mount of the single/only
13 * fileset in the aggregate and, if unmount of the last fileset,
14 * as unmount of the aggerate;
18 #include "jfs_incore.h"
19 #include "jfs_filsys.h"
20 #include "jfs_superblock.h"
23 #include "jfs_metapage.h"
24 #include "jfs_debug.h"
27 * NAME: jfs_umount(vfsp, flags, crp)
29 * FUNCTION: vfs_umount()
31 * PARAMETERS: vfsp - virtual file system pointer
32 * flags - unmount for shutdown
35 * RETURN : EBUSY - device has open files
37 int jfs_umount(struct super_block *sb)
39 struct jfs_sb_info *sbi = JFS_SBI(sb);
40 struct inode *ipbmap = sbi->ipbmap;
41 struct inode *ipimap = sbi->ipimap;
42 struct inode *ipaimap = sbi->ipaimap;
43 struct inode *ipaimap2 = sbi->ipaimap2;
47 jfs_info("UnMount JFS: sb:0x%p", sb);
50 * update superblock and close log
52 * if mounted read-write and log based recovery was enabled
56 * Wait for outstanding transactions to be written to log:
58 jfs_flush_journal(log, 2);
61 * close fileset inode allocation map (aka fileset inode)
65 diFreeSpecial(ipimap);
69 * close secondary aggregate inode allocation map
71 ipaimap2 = sbi->ipaimap2;
73 diUnmount(ipaimap2, 0);
74 diFreeSpecial(ipaimap2);
79 * close aggregate inode allocation map
81 ipaimap = sbi->ipaimap;
82 diUnmount(ipaimap, 0);
83 diFreeSpecial(ipaimap);
87 * close aggregate block allocation map
91 diFreeSpecial(ipbmap);
95 * Make sure all metadata makes it to disk before we mark
96 * the superblock as clean
98 filemap_write_and_wait(sbi->direct_inode->i_mapping);
101 * ensure all file system file pages are propagated to their
102 * home blocks on disk (and their in-memory buffer pages are
103 * invalidated) BEFORE updating file system superblock state
104 * (to signify file system is unmounted cleanly, and thus in
105 * consistent state) and log superblock active file system
106 * list (to signify skip logredo()).
108 if (log) { /* log = NULL if read-only mount */
109 updateSuper(sb, FM_CLEAN);
114 * remove file system from log active file system list.
118 jfs_info("UnMount JFS Complete: rc = %d", rc);
123 int jfs_umount_rw(struct super_block *sb)
125 struct jfs_sb_info *sbi = JFS_SBI(sb);
126 struct jfs_log *log = sbi->log;
134 * remove file system from log active file system list.
136 jfs_flush_journal(log, 2);
139 * Make sure all metadata makes it to disk
145 * Note that we have to do this even if sync_blockdev() will
146 * do exactly the same a few instructions later: We can't
147 * mark the superblock clean before everything is flushed to
150 filemap_write_and_wait(sbi->direct_inode->i_mapping);
152 updateSuper(sb, FM_CLEAN);
154 return lmLogClose(sb);