1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* 1 /*
3 * Copyright (C) International Business Mach !! 2 * Copyright (c) International Business Machines Corp., 2000-2002
>> 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
4 */ 17 */
5 18
6 /* 19 /*
7 * jfs_umount.c 20 * jfs_umount.c
8 * 21 *
9 * note: file system in transition to aggregat 22 * note: file system in transition to aggregate/fileset:
10 * (ref. jfs_mount.c) 23 * (ref. jfs_mount.c)
11 * 24 *
12 * file system unmount is interpreted as mount !! 25 * file system unmount is interpreted as mount of the single/only
13 * fileset in the aggregate and, if unmount of !! 26 * fileset in the aggregate and, if unmount of the last fileset,
14 * as unmount of the aggerate; 27 * as unmount of the aggerate;
15 */ 28 */
16 29
17 #include <linux/fs.h> 30 #include <linux/fs.h>
18 #include "jfs_incore.h" 31 #include "jfs_incore.h"
19 #include "jfs_filsys.h" 32 #include "jfs_filsys.h"
20 #include "jfs_superblock.h" 33 #include "jfs_superblock.h"
21 #include "jfs_dmap.h" 34 #include "jfs_dmap.h"
22 #include "jfs_imap.h" 35 #include "jfs_imap.h"
23 #include "jfs_metapage.h" 36 #include "jfs_metapage.h"
24 #include "jfs_debug.h" 37 #include "jfs_debug.h"
25 38
26 /* 39 /*
27 * NAME: jfs_umount(vfsp, flags, crp) 40 * NAME: jfs_umount(vfsp, flags, crp)
28 * 41 *
29 * FUNCTION: vfs_umount() 42 * FUNCTION: vfs_umount()
30 * 43 *
31 * PARAMETERS: vfsp - virtual file system 44 * PARAMETERS: vfsp - virtual file system pointer
32 * flags - unmount for shutdown 45 * flags - unmount for shutdown
33 * crp - credential 46 * crp - credential
34 * 47 *
35 * RETURN : EBUSY - device has open file 48 * RETURN : EBUSY - device has open files
36 */ 49 */
37 int jfs_umount(struct super_block *sb) 50 int jfs_umount(struct super_block *sb)
38 { 51 {
>> 52 struct address_space *bdev_mapping = sb->s_bdev->bd_inode->i_mapping;
39 struct jfs_sb_info *sbi = JFS_SBI(sb); 53 struct jfs_sb_info *sbi = JFS_SBI(sb);
40 struct inode *ipbmap = sbi->ipbmap; 54 struct inode *ipbmap = sbi->ipbmap;
41 struct inode *ipimap = sbi->ipimap; 55 struct inode *ipimap = sbi->ipimap;
42 struct inode *ipaimap = sbi->ipaimap; 56 struct inode *ipaimap = sbi->ipaimap;
43 struct inode *ipaimap2 = sbi->ipaimap2 57 struct inode *ipaimap2 = sbi->ipaimap2;
44 struct jfs_log *log; 58 struct jfs_log *log;
45 int rc = 0; 59 int rc = 0;
46 60
47 jfs_info("UnMount JFS: sb:0x%p", sb); 61 jfs_info("UnMount JFS: sb:0x%p", sb);
48 62
49 /* 63 /*
50 * update superblock and close lo !! 64 * update superblock and close log
51 * 65 *
52 * if mounted read-write and log based 66 * if mounted read-write and log based recovery was enabled
53 */ 67 */
54 if ((log = sbi->log)) 68 if ((log = sbi->log))
55 /* 69 /*
56 * Wait for outstanding transa !! 70 * Wait for outstanding transactions to be written to log:
57 */ 71 */
58 jfs_flush_journal(log, 2); 72 jfs_flush_journal(log, 2);
59 73
60 /* 74 /*
61 * close fileset inode allocation map 75 * close fileset inode allocation map (aka fileset inode)
62 */ 76 */
63 diUnmount(ipimap, 0); 77 diUnmount(ipimap, 0);
64 78
65 diFreeSpecial(ipimap); 79 diFreeSpecial(ipimap);
66 sbi->ipimap = NULL; 80 sbi->ipimap = NULL;
67 81
68 /* 82 /*
69 * close secondary aggregate inode all 83 * close secondary aggregate inode allocation map
70 */ 84 */
>> 85 ipaimap2 = sbi->ipaimap2;
71 if (ipaimap2) { 86 if (ipaimap2) {
72 diUnmount(ipaimap2, 0); 87 diUnmount(ipaimap2, 0);
73 diFreeSpecial(ipaimap2); 88 diFreeSpecial(ipaimap2);
74 sbi->ipaimap2 = NULL; 89 sbi->ipaimap2 = NULL;
75 } 90 }
76 91
77 /* 92 /*
78 * close aggregate inode allocation ma 93 * close aggregate inode allocation map
79 */ 94 */
>> 95 ipaimap = sbi->ipaimap;
80 diUnmount(ipaimap, 0); 96 diUnmount(ipaimap, 0);
81 diFreeSpecial(ipaimap); 97 diFreeSpecial(ipaimap);
82 sbi->ipaimap = NULL; 98 sbi->ipaimap = NULL;
83 99
84 /* 100 /*
85 * close aggregate block allocation ma 101 * close aggregate block allocation map
86 */ 102 */
87 dbUnmount(ipbmap, 0); 103 dbUnmount(ipbmap, 0);
88 104
89 diFreeSpecial(ipbmap); 105 diFreeSpecial(ipbmap);
90 sbi->ipbmap = NULL; !! 106 sbi->ipimap = NULL;
91 107
92 /* 108 /*
93 * Make sure all metadata makes it to 109 * Make sure all metadata makes it to disk before we mark
94 * the superblock as clean 110 * the superblock as clean
95 */ 111 */
96 filemap_write_and_wait(sbi->direct_ino !! 112 filemap_fdatawrite(bdev_mapping);
>> 113 filemap_fdatawait(bdev_mapping);
97 114
98 /* 115 /*
99 * ensure all file system file pages a 116 * ensure all file system file pages are propagated to their
100 * home blocks on disk (and their in-m !! 117 * home blocks on disk (and their in-memory buffer pages are
101 * invalidated) BEFORE updating file s 118 * invalidated) BEFORE updating file system superblock state
102 * (to signify file system is unmounte !! 119 * (to signify file system is unmounted cleanly, and thus in
103 * consistent state) and log superbloc !! 120 * consistent state) and log superblock active file system
104 * list (to signify skip logredo()). 121 * list (to signify skip logredo()).
105 */ 122 */
106 if (log) { /* log = NULL 123 if (log) { /* log = NULL if read-only mount */
107 updateSuper(sb, FM_CLEAN); !! 124 rc = updateSuper(sb, FM_CLEAN);
108 125
109 /* 126 /*
110 * close log: !! 127 * close log:
111 * 128 *
112 * remove file system from log 129 * remove file system from log active file system list.
113 */ 130 */
114 rc = lmLogClose(sb); !! 131 rc = lmLogClose(sb, log);
115 } 132 }
116 jfs_info("UnMount JFS Complete: rc = % 133 jfs_info("UnMount JFS Complete: rc = %d", rc);
117 return rc; 134 return rc;
118 } 135 }
119 136
120 137
121 int jfs_umount_rw(struct super_block *sb) 138 int jfs_umount_rw(struct super_block *sb)
122 { 139 {
>> 140 struct address_space *bdev_mapping = sb->s_bdev->bd_inode->i_mapping;
123 struct jfs_sb_info *sbi = JFS_SBI(sb); 141 struct jfs_sb_info *sbi = JFS_SBI(sb);
124 struct jfs_log *log = sbi->log; 142 struct jfs_log *log = sbi->log;
125 143
126 if (!log) 144 if (!log)
127 return 0; 145 return 0;
128 146
129 /* 147 /*
130 * close log: !! 148 * close log:
131 * 149 *
132 * remove file system from log active 150 * remove file system from log active file system list.
133 */ 151 */
134 jfs_flush_journal(log, 2); 152 jfs_flush_journal(log, 2);
135 153
136 /* 154 /*
137 * Make sure all metadata makes it to 155 * Make sure all metadata makes it to disk
138 */ 156 */
139 dbSync(sbi->ipbmap); 157 dbSync(sbi->ipbmap);
140 diSync(sbi->ipimap); 158 diSync(sbi->ipimap);
141 159
142 /* 160 /*
143 * Note that we have to do this even i 161 * Note that we have to do this even if sync_blockdev() will
144 * do exactly the same a few instructi 162 * do exactly the same a few instructions later: We can't
145 * mark the superblock clean before ev 163 * mark the superblock clean before everything is flushed to
146 * disk. 164 * disk.
147 */ 165 */
148 filemap_write_and_wait(sbi->direct_ino !! 166 filemap_fdatawrite(bdev_mapping);
>> 167 filemap_fdatawait(bdev_mapping);
149 168
150 updateSuper(sb, FM_CLEAN); 169 updateSuper(sb, FM_CLEAN);
>> 170 sbi->log = NULL;
151 171
152 return lmLogClose(sb); !! 172 return lmLogClose(sb, log);
153 } 173 }
154 174
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