blob: 5cf91785b5416be6016ab720871cd0b3bcc9477c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) International Business Machines Corp., 2000-2004
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19/*
20 * jfs_umount.c
21 *
22 * note: file system in transition to aggregate/fileset:
23 * (ref. jfs_mount.c)
24 *
25 * file system unmount is interpreted as mount of the single/only
26 * fileset in the aggregate and, if unmount of the last fileset,
27 * as unmount of the aggerate;
28 */
29
30#include <linux/fs.h>
31#include "jfs_incore.h"
32#include "jfs_filsys.h"
33#include "jfs_superblock.h"
34#include "jfs_dmap.h"
35#include "jfs_imap.h"
36#include "jfs_metapage.h"
37#include "jfs_debug.h"
38
39/*
40 * NAME: jfs_umount(vfsp, flags, crp)
41 *
42 * FUNCTION: vfs_umount()
43 *
44 * PARAMETERS: vfsp - virtual file system pointer
45 * flags - unmount for shutdown
46 * crp - credential
47 *
48 * RETURN : EBUSY - device has open files
49 */
50int jfs_umount(struct super_block *sb)
51{
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 struct jfs_sb_info *sbi = JFS_SBI(sb);
53 struct inode *ipbmap = sbi->ipbmap;
54 struct inode *ipimap = sbi->ipimap;
55 struct inode *ipaimap = sbi->ipaimap;
56 struct inode *ipaimap2 = sbi->ipaimap2;
57 struct jfs_log *log;
58 int rc = 0;
59
60 jfs_info("UnMount JFS: sb:0x%p", sb);
61
62 /*
63 * update superblock and close log
64 *
65 * if mounted read-write and log based recovery was enabled
66 */
67 if ((log = sbi->log))
68 /*
69 * Wait for outstanding transactions to be written to log:
70 */
71 jfs_flush_journal(log, 2);
72
73 /*
74 * close fileset inode allocation map (aka fileset inode)
75 */
76 diUnmount(ipimap, 0);
77
78 diFreeSpecial(ipimap);
79 sbi->ipimap = NULL;
80
81 /*
82 * close secondary aggregate inode allocation map
83 */
84 ipaimap2 = sbi->ipaimap2;
85 if (ipaimap2) {
86 diUnmount(ipaimap2, 0);
87 diFreeSpecial(ipaimap2);
88 sbi->ipaimap2 = NULL;
89 }
90
91 /*
92 * close aggregate inode allocation map
93 */
94 ipaimap = sbi->ipaimap;
95 diUnmount(ipaimap, 0);
96 diFreeSpecial(ipaimap);
97 sbi->ipaimap = NULL;
98
99 /*
100 * close aggregate block allocation map
101 */
102 dbUnmount(ipbmap, 0);
103
104 diFreeSpecial(ipbmap);
105 sbi->ipimap = NULL;
106
107 /*
108 * Make sure all metadata makes it to disk before we mark
109 * the superblock as clean
110 */
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600111 filemap_fdatawrite(sbi->direct_inode->i_mapping);
112 filemap_fdatawait(sbi->direct_inode->i_mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114 /*
115 * ensure all file system file pages are propagated to their
116 * home blocks on disk (and their in-memory buffer pages are
117 * invalidated) BEFORE updating file system superblock state
118 * (to signify file system is unmounted cleanly, and thus in
119 * consistent state) and log superblock active file system
120 * list (to signify skip logredo()).
121 */
122 if (log) { /* log = NULL if read-only mount */
123 updateSuper(sb, FM_CLEAN);
124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 /*
126 * close log:
127 *
128 * remove file system from log active file system list.
129 */
130 rc = lmLogClose(sb);
131 }
132 jfs_info("UnMount JFS Complete: rc = %d", rc);
133 return rc;
134}
135
136
137int jfs_umount_rw(struct super_block *sb)
138{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 struct jfs_sb_info *sbi = JFS_SBI(sb);
140 struct jfs_log *log = sbi->log;
141
142 if (!log)
143 return 0;
144
145 /*
146 * close log:
147 *
148 * remove file system from log active file system list.
149 */
150 jfs_flush_journal(log, 2);
151
152 /*
153 * Make sure all metadata makes it to disk
154 */
155 dbSync(sbi->ipbmap);
156 diSync(sbi->ipimap);
157
158 /*
159 * Note that we have to do this even if sync_blockdev() will
160 * do exactly the same a few instructions later: We can't
161 * mark the superblock clean before everything is flushed to
162 * disk.
163 */
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600164 filemap_fdatawrite(sbi->direct_inode->i_mapping);
165 filemap_fdatawait(sbi->direct_inode->i_mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167 updateSuper(sb, FM_CLEAN);
168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 return lmLogClose(sb);
170}