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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 | */ |
50 | int 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, 1); |
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 | |
136 | int 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, 1); |
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 | } |
169 |
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v2.6.34-rc5
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