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1/*
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{
52 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 */
111 filemap_write_and_wait(sbi->direct_inode->i_mapping);
112
113 /*
114 * ensure all file system file pages are propagated to their
115 * home blocks on disk (and their in-memory buffer pages are
116 * invalidated) BEFORE updating file system superblock state
117 * (to signify file system is unmounted cleanly, and thus in
118 * consistent state) and log superblock active file system
119 * list (to signify skip logredo()).
120 */
121 if (log) { /* log = NULL if read-only mount */
122 updateSuper(sb, FM_CLEAN);
123
124 /*
125 * close log:
126 *
127 * remove file system from log active file system list.
128 */
129 rc = lmLogClose(sb);
130 }
131 jfs_info("UnMount JFS Complete: rc = %d", rc);
132 return rc;
133}
134
135
136int jfs_umount_rw(struct super_block *sb)
137{
138 struct jfs_sb_info *sbi = JFS_SBI(sb);
139 struct jfs_log *log = sbi->log;
140
141 if (!log)
142 return 0;
143
144 /*
145 * close log:
146 *
147 * remove file system from log active file system list.
148 */
149 jfs_flush_journal(log, 2);
150
151 /*
152 * Make sure all metadata makes it to disk
153 */
154 dbSync(sbi->ipbmap);
155 diSync(sbi->ipimap);
156
157 /*
158 * Note that we have to do this even if sync_blockdev() will
159 * do exactly the same a few instructions later: We can't
160 * mark the superblock clean before everything is flushed to
161 * disk.
162 */
163 filemap_write_and_wait(sbi->direct_inode->i_mapping);
164
165 updateSuper(sb, FM_CLEAN);
166
167 return lmLogClose(sb);
168}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) International Business Machines Corp., 2000-2004
4 */
5
6/*
7 * jfs_umount.c
8 *
9 * note: file system in transition to aggregate/fileset:
10 * (ref. jfs_mount.c)
11 *
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;
15 */
16
17#include <linux/fs.h>
18#include "jfs_incore.h"
19#include "jfs_filsys.h"
20#include "jfs_superblock.h"
21#include "jfs_dmap.h"
22#include "jfs_imap.h"
23#include "jfs_metapage.h"
24#include "jfs_debug.h"
25
26/*
27 * NAME: jfs_umount(vfsp, flags, crp)
28 *
29 * FUNCTION: vfs_umount()
30 *
31 * PARAMETERS: vfsp - virtual file system pointer
32 * flags - unmount for shutdown
33 * crp - credential
34 *
35 * RETURN : EBUSY - device has open files
36 */
37int jfs_umount(struct super_block *sb)
38{
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;
44 struct jfs_log *log;
45 int rc = 0;
46
47 jfs_info("UnMount JFS: sb:0x%p", sb);
48
49 /*
50 * update superblock and close log
51 *
52 * if mounted read-write and log based recovery was enabled
53 */
54 if ((log = sbi->log))
55 /*
56 * Wait for outstanding transactions to be written to log:
57 */
58 jfs_flush_journal(log, 2);
59
60 /*
61 * close fileset inode allocation map (aka fileset inode)
62 */
63 diUnmount(ipimap, 0);
64
65 diFreeSpecial(ipimap);
66 sbi->ipimap = NULL;
67
68 /*
69 * close secondary aggregate inode allocation map
70 */
71 if (ipaimap2) {
72 diUnmount(ipaimap2, 0);
73 diFreeSpecial(ipaimap2);
74 sbi->ipaimap2 = NULL;
75 }
76
77 /*
78 * close aggregate inode allocation map
79 */
80 diUnmount(ipaimap, 0);
81 diFreeSpecial(ipaimap);
82 sbi->ipaimap = NULL;
83
84 /*
85 * close aggregate block allocation map
86 */
87 dbUnmount(ipbmap, 0);
88
89 diFreeSpecial(ipbmap);
90 sbi->ipbmap = NULL;
91
92 /*
93 * Make sure all metadata makes it to disk before we mark
94 * the superblock as clean
95 */
96 filemap_write_and_wait(sbi->direct_inode->i_mapping);
97
98 /*
99 * ensure all file system file pages are propagated to their
100 * home blocks on disk (and their in-memory buffer pages are
101 * invalidated) BEFORE updating file system superblock state
102 * (to signify file system is unmounted cleanly, and thus in
103 * consistent state) and log superblock active file system
104 * list (to signify skip logredo()).
105 */
106 if (log) { /* log = NULL if read-only mount */
107 updateSuper(sb, FM_CLEAN);
108
109 /*
110 * close log:
111 *
112 * remove file system from log active file system list.
113 */
114 rc = lmLogClose(sb);
115 }
116 jfs_info("UnMount JFS Complete: rc = %d", rc);
117 return rc;
118}
119
120
121int jfs_umount_rw(struct super_block *sb)
122{
123 struct jfs_sb_info *sbi = JFS_SBI(sb);
124 struct jfs_log *log = sbi->log;
125
126 if (!log)
127 return 0;
128
129 /*
130 * close log:
131 *
132 * remove file system from log active file system list.
133 */
134 jfs_flush_journal(log, 2);
135
136 /*
137 * Make sure all metadata makes it to disk
138 */
139 dbSync(sbi->ipbmap);
140 diSync(sbi->ipimap);
141
142 /*
143 * Note that we have to do this even if sync_blockdev() will
144 * do exactly the same a few instructions later: We can't
145 * mark the superblock clean before everything is flushed to
146 * disk.
147 */
148 filemap_write_and_wait(sbi->direct_inode->i_mapping);
149
150 updateSuper(sb, FM_CLEAN);
151
152 return lmLogClose(sb);
153}