1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* 1 /*
3 * Copyright (C) International Business Mach 2 * Copyright (C) International Business Machines Corp., 2000-2004
>> 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
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 {
39 struct jfs_sb_info *sbi = JFS_SBI(sb); 52 struct jfs_sb_info *sbi = JFS_SBI(sb);
40 struct inode *ipbmap = sbi->ipbmap; 53 struct inode *ipbmap = sbi->ipbmap;
41 struct inode *ipimap = sbi->ipimap; 54 struct inode *ipimap = sbi->ipimap;
42 struct inode *ipaimap = sbi->ipaimap; 55 struct inode *ipaimap = sbi->ipaimap;
43 struct inode *ipaimap2 = sbi->ipaimap2 56 struct inode *ipaimap2 = sbi->ipaimap2;
44 struct jfs_log *log; 57 struct jfs_log *log;
45 int rc = 0; 58 int rc = 0;
46 59
47 jfs_info("UnMount JFS: sb:0x%p", sb); 60 jfs_info("UnMount JFS: sb:0x%p", sb);
48 61
49 /* 62 /*
50 * update superblock and close lo 63 * update superblock and close log
51 * 64 *
52 * if mounted read-write and log based 65 * if mounted read-write and log based recovery was enabled
53 */ 66 */
54 if ((log = sbi->log)) 67 if ((log = sbi->log))
55 /* 68 /*
56 * Wait for outstanding transa 69 * Wait for outstanding transactions to be written to log:
57 */ 70 */
58 jfs_flush_journal(log, 2); 71 jfs_flush_journal(log, 2);
59 72
60 /* 73 /*
61 * close fileset inode allocation map 74 * close fileset inode allocation map (aka fileset inode)
62 */ 75 */
63 diUnmount(ipimap, 0); 76 diUnmount(ipimap, 0);
64 77
65 diFreeSpecial(ipimap); 78 diFreeSpecial(ipimap);
66 sbi->ipimap = NULL; 79 sbi->ipimap = NULL;
67 80
68 /* 81 /*
69 * close secondary aggregate inode all 82 * close secondary aggregate inode allocation map
70 */ 83 */
>> 84 ipaimap2 = sbi->ipaimap2;
71 if (ipaimap2) { 85 if (ipaimap2) {
72 diUnmount(ipaimap2, 0); 86 diUnmount(ipaimap2, 0);
73 diFreeSpecial(ipaimap2); 87 diFreeSpecial(ipaimap2);
74 sbi->ipaimap2 = NULL; 88 sbi->ipaimap2 = NULL;
75 } 89 }
76 90
77 /* 91 /*
78 * close aggregate inode allocation ma 92 * close aggregate inode allocation map
79 */ 93 */
>> 94 ipaimap = sbi->ipaimap;
80 diUnmount(ipaimap, 0); 95 diUnmount(ipaimap, 0);
81 diFreeSpecial(ipaimap); 96 diFreeSpecial(ipaimap);
82 sbi->ipaimap = NULL; 97 sbi->ipaimap = NULL;
83 98
84 /* 99 /*
85 * close aggregate block allocation ma 100 * close aggregate block allocation map
86 */ 101 */
87 dbUnmount(ipbmap, 0); 102 dbUnmount(ipbmap, 0);
88 103
89 diFreeSpecial(ipbmap); 104 diFreeSpecial(ipbmap);
90 sbi->ipbmap = NULL; !! 105 sbi->ipimap = NULL;
91 106
92 /* 107 /*
93 * Make sure all metadata makes it to 108 * Make sure all metadata makes it to disk before we mark
94 * the superblock as clean 109 * the superblock as clean
95 */ 110 */
96 filemap_write_and_wait(sbi->direct_ino 111 filemap_write_and_wait(sbi->direct_inode->i_mapping);
97 112
98 /* 113 /*
99 * ensure all file system file pages a 114 * ensure all file system file pages are propagated to their
100 * home blocks on disk (and their in-m 115 * home blocks on disk (and their in-memory buffer pages are
101 * invalidated) BEFORE updating file s 116 * invalidated) BEFORE updating file system superblock state
102 * (to signify file system is unmounte 117 * (to signify file system is unmounted cleanly, and thus in
103 * consistent state) and log superbloc 118 * consistent state) and log superblock active file system
104 * list (to signify skip logredo()). 119 * list (to signify skip logredo()).
105 */ 120 */
106 if (log) { /* log = NULL 121 if (log) { /* log = NULL if read-only mount */
107 updateSuper(sb, FM_CLEAN); 122 updateSuper(sb, FM_CLEAN);
108 123
109 /* 124 /*
110 * close log: 125 * close log:
111 * 126 *
112 * remove file system from log 127 * remove file system from log active file system list.
113 */ 128 */
114 rc = lmLogClose(sb); 129 rc = lmLogClose(sb);
115 } 130 }
116 jfs_info("UnMount JFS Complete: rc = % 131 jfs_info("UnMount JFS Complete: rc = %d", rc);
117 return rc; 132 return rc;
118 } 133 }
119 134
120 135
121 int jfs_umount_rw(struct super_block *sb) 136 int jfs_umount_rw(struct super_block *sb)
122 { 137 {
123 struct jfs_sb_info *sbi = JFS_SBI(sb); 138 struct jfs_sb_info *sbi = JFS_SBI(sb);
124 struct jfs_log *log = sbi->log; 139 struct jfs_log *log = sbi->log;
125 140
126 if (!log) 141 if (!log)
127 return 0; 142 return 0;
128 143
129 /* 144 /*
130 * close log: 145 * close log:
131 * 146 *
132 * remove file system from log active 147 * remove file system from log active file system list.
133 */ 148 */
134 jfs_flush_journal(log, 2); 149 jfs_flush_journal(log, 2);
135 150
136 /* 151 /*
137 * Make sure all metadata makes it to 152 * Make sure all metadata makes it to disk
138 */ 153 */
139 dbSync(sbi->ipbmap); 154 dbSync(sbi->ipbmap);
140 diSync(sbi->ipimap); 155 diSync(sbi->ipimap);
141 156
142 /* 157 /*
143 * Note that we have to do this even i 158 * Note that we have to do this even if sync_blockdev() will
144 * do exactly the same a few instructi 159 * do exactly the same a few instructions later: We can't
145 * mark the superblock clean before ev 160 * mark the superblock clean before everything is flushed to
146 * disk. 161 * disk.
147 */ 162 */
148 filemap_write_and_wait(sbi->direct_ino 163 filemap_write_and_wait(sbi->direct_inode->i_mapping);
149 164
150 updateSuper(sb, FM_CLEAN); 165 updateSuper(sb, FM_CLEAN);
151 166
152 return lmLogClose(sb); 167 return lmLogClose(sb);
153 } 168 }
154 169
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