1 // SPDX-License-Identifier: GPL-2.0-or-later 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* 2 /*
3 * Copyright (C) International Business Mach 3 * Copyright (C) International Business Machines Corp., 2000-2004
4 */ 4 */
5 5
6 /* 6 /*
7 * jfs_umount.c 7 * jfs_umount.c
8 * 8 *
9 * note: file system in transition to aggregat 9 * note: file system in transition to aggregate/fileset:
10 * (ref. jfs_mount.c) 10 * (ref. jfs_mount.c)
11 * 11 *
12 * file system unmount is interpreted as mount 12 * file system unmount is interpreted as mount of the single/only
13 * fileset in the aggregate and, if unmount of 13 * fileset in the aggregate and, if unmount of the last fileset,
14 * as unmount of the aggerate; 14 * as unmount of the aggerate;
15 */ 15 */
16 16
17 #include <linux/fs.h> 17 #include <linux/fs.h>
18 #include "jfs_incore.h" 18 #include "jfs_incore.h"
19 #include "jfs_filsys.h" 19 #include "jfs_filsys.h"
20 #include "jfs_superblock.h" 20 #include "jfs_superblock.h"
21 #include "jfs_dmap.h" 21 #include "jfs_dmap.h"
22 #include "jfs_imap.h" 22 #include "jfs_imap.h"
23 #include "jfs_metapage.h" 23 #include "jfs_metapage.h"
24 #include "jfs_debug.h" 24 #include "jfs_debug.h"
25 25
26 /* 26 /*
27 * NAME: jfs_umount(vfsp, flags, crp) 27 * NAME: jfs_umount(vfsp, flags, crp)
28 * 28 *
29 * FUNCTION: vfs_umount() 29 * FUNCTION: vfs_umount()
30 * 30 *
31 * PARAMETERS: vfsp - virtual file system 31 * PARAMETERS: vfsp - virtual file system pointer
32 * flags - unmount for shutdown 32 * flags - unmount for shutdown
33 * crp - credential 33 * crp - credential
34 * 34 *
35 * RETURN : EBUSY - device has open file 35 * RETURN : EBUSY - device has open files
36 */ 36 */
37 int jfs_umount(struct super_block *sb) 37 int jfs_umount(struct super_block *sb)
38 { 38 {
39 struct jfs_sb_info *sbi = JFS_SBI(sb); 39 struct jfs_sb_info *sbi = JFS_SBI(sb);
40 struct inode *ipbmap = sbi->ipbmap; 40 struct inode *ipbmap = sbi->ipbmap;
41 struct inode *ipimap = sbi->ipimap; 41 struct inode *ipimap = sbi->ipimap;
42 struct inode *ipaimap = sbi->ipaimap; 42 struct inode *ipaimap = sbi->ipaimap;
43 struct inode *ipaimap2 = sbi->ipaimap2 43 struct inode *ipaimap2 = sbi->ipaimap2;
44 struct jfs_log *log; 44 struct jfs_log *log;
45 int rc = 0; 45 int rc = 0;
46 46
47 jfs_info("UnMount JFS: sb:0x%p", sb); 47 jfs_info("UnMount JFS: sb:0x%p", sb);
48 48
49 /* 49 /*
50 * update superblock and close lo 50 * update superblock and close log
51 * 51 *
52 * if mounted read-write and log based 52 * if mounted read-write and log based recovery was enabled
53 */ 53 */
54 if ((log = sbi->log)) 54 if ((log = sbi->log))
55 /* 55 /*
56 * Wait for outstanding transa 56 * Wait for outstanding transactions to be written to log:
57 */ 57 */
58 jfs_flush_journal(log, 2); 58 jfs_flush_journal(log, 2);
59 59
60 /* 60 /*
61 * close fileset inode allocation map 61 * close fileset inode allocation map (aka fileset inode)
62 */ 62 */
63 diUnmount(ipimap, 0); 63 diUnmount(ipimap, 0);
64 64
65 diFreeSpecial(ipimap); 65 diFreeSpecial(ipimap);
66 sbi->ipimap = NULL; 66 sbi->ipimap = NULL;
67 67
68 /* 68 /*
69 * close secondary aggregate inode all 69 * close secondary aggregate inode allocation map
70 */ 70 */
>> 71 ipaimap2 = sbi->ipaimap2;
71 if (ipaimap2) { 72 if (ipaimap2) {
72 diUnmount(ipaimap2, 0); 73 diUnmount(ipaimap2, 0);
73 diFreeSpecial(ipaimap2); 74 diFreeSpecial(ipaimap2);
74 sbi->ipaimap2 = NULL; 75 sbi->ipaimap2 = NULL;
75 } 76 }
76 77
77 /* 78 /*
78 * close aggregate inode allocation ma 79 * close aggregate inode allocation map
79 */ 80 */
>> 81 ipaimap = sbi->ipaimap;
80 diUnmount(ipaimap, 0); 82 diUnmount(ipaimap, 0);
81 diFreeSpecial(ipaimap); 83 diFreeSpecial(ipaimap);
82 sbi->ipaimap = NULL; 84 sbi->ipaimap = NULL;
83 85
84 /* 86 /*
85 * close aggregate block allocation ma 87 * close aggregate block allocation map
86 */ 88 */
87 dbUnmount(ipbmap, 0); 89 dbUnmount(ipbmap, 0);
88 90
89 diFreeSpecial(ipbmap); 91 diFreeSpecial(ipbmap);
90 sbi->ipbmap = NULL; !! 92 sbi->ipimap = NULL;
91 93
92 /* 94 /*
93 * Make sure all metadata makes it to 95 * Make sure all metadata makes it to disk before we mark
94 * the superblock as clean 96 * the superblock as clean
95 */ 97 */
96 filemap_write_and_wait(sbi->direct_ino 98 filemap_write_and_wait(sbi->direct_inode->i_mapping);
97 99
98 /* 100 /*
99 * ensure all file system file pages a 101 * ensure all file system file pages are propagated to their
100 * home blocks on disk (and their in-m 102 * home blocks on disk (and their in-memory buffer pages are
101 * invalidated) BEFORE updating file s 103 * invalidated) BEFORE updating file system superblock state
102 * (to signify file system is unmounte 104 * (to signify file system is unmounted cleanly, and thus in
103 * consistent state) and log superbloc 105 * consistent state) and log superblock active file system
104 * list (to signify skip logredo()). 106 * list (to signify skip logredo()).
105 */ 107 */
106 if (log) { /* log = NULL 108 if (log) { /* log = NULL if read-only mount */
107 updateSuper(sb, FM_CLEAN); 109 updateSuper(sb, FM_CLEAN);
108 110
109 /* 111 /*
110 * close log: 112 * close log:
111 * 113 *
112 * remove file system from log 114 * remove file system from log active file system list.
113 */ 115 */
114 rc = lmLogClose(sb); 116 rc = lmLogClose(sb);
115 } 117 }
116 jfs_info("UnMount JFS Complete: rc = % 118 jfs_info("UnMount JFS Complete: rc = %d", rc);
117 return rc; 119 return rc;
118 } 120 }
119 121
120 122
121 int jfs_umount_rw(struct super_block *sb) 123 int jfs_umount_rw(struct super_block *sb)
122 { 124 {
123 struct jfs_sb_info *sbi = JFS_SBI(sb); 125 struct jfs_sb_info *sbi = JFS_SBI(sb);
124 struct jfs_log *log = sbi->log; 126 struct jfs_log *log = sbi->log;
125 127
126 if (!log) 128 if (!log)
127 return 0; 129 return 0;
128 130
129 /* 131 /*
130 * close log: 132 * close log:
131 * 133 *
132 * remove file system from log active 134 * remove file system from log active file system list.
133 */ 135 */
134 jfs_flush_journal(log, 2); 136 jfs_flush_journal(log, 2);
135 137
136 /* 138 /*
137 * Make sure all metadata makes it to 139 * Make sure all metadata makes it to disk
138 */ 140 */
139 dbSync(sbi->ipbmap); 141 dbSync(sbi->ipbmap);
140 diSync(sbi->ipimap); 142 diSync(sbi->ipimap);
141 143
142 /* 144 /*
143 * Note that we have to do this even i 145 * Note that we have to do this even if sync_blockdev() will
144 * do exactly the same a few instructi 146 * do exactly the same a few instructions later: We can't
145 * mark the superblock clean before ev 147 * mark the superblock clean before everything is flushed to
146 * disk. 148 * disk.
147 */ 149 */
148 filemap_write_and_wait(sbi->direct_ino 150 filemap_write_and_wait(sbi->direct_inode->i_mapping);
149 151
150 updateSuper(sb, FM_CLEAN); 152 updateSuper(sb, FM_CLEAN);
151 153
152 return lmLogClose(sb); 154 return lmLogClose(sb);
153 } 155 }
154 156
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.