1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) International Business Machines Corp., 2000-2004
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun /*
7*4882a593Smuzhiyun * jfs_umount.c
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * note: file system in transition to aggregate/fileset:
10*4882a593Smuzhiyun * (ref. jfs_mount.c)
11*4882a593Smuzhiyun *
12*4882a593Smuzhiyun * file system unmount is interpreted as mount of the single/only
13*4882a593Smuzhiyun * fileset in the aggregate and, if unmount of the last fileset,
14*4882a593Smuzhiyun * as unmount of the aggerate;
15*4882a593Smuzhiyun */
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #include <linux/fs.h>
18*4882a593Smuzhiyun #include "jfs_incore.h"
19*4882a593Smuzhiyun #include "jfs_filsys.h"
20*4882a593Smuzhiyun #include "jfs_superblock.h"
21*4882a593Smuzhiyun #include "jfs_dmap.h"
22*4882a593Smuzhiyun #include "jfs_imap.h"
23*4882a593Smuzhiyun #include "jfs_metapage.h"
24*4882a593Smuzhiyun #include "jfs_debug.h"
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun /*
27*4882a593Smuzhiyun * NAME: jfs_umount(vfsp, flags, crp)
28*4882a593Smuzhiyun *
29*4882a593Smuzhiyun * FUNCTION: vfs_umount()
30*4882a593Smuzhiyun *
31*4882a593Smuzhiyun * PARAMETERS: vfsp - virtual file system pointer
32*4882a593Smuzhiyun * flags - unmount for shutdown
33*4882a593Smuzhiyun * crp - credential
34*4882a593Smuzhiyun *
35*4882a593Smuzhiyun * RETURN : EBUSY - device has open files
36*4882a593Smuzhiyun */
jfs_umount(struct super_block * sb)37*4882a593Smuzhiyun int jfs_umount(struct super_block *sb)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun struct jfs_sb_info *sbi = JFS_SBI(sb);
40*4882a593Smuzhiyun struct inode *ipbmap = sbi->ipbmap;
41*4882a593Smuzhiyun struct inode *ipimap = sbi->ipimap;
42*4882a593Smuzhiyun struct inode *ipaimap = sbi->ipaimap;
43*4882a593Smuzhiyun struct inode *ipaimap2 = sbi->ipaimap2;
44*4882a593Smuzhiyun struct jfs_log *log;
45*4882a593Smuzhiyun int rc = 0;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun jfs_info("UnMount JFS: sb:0x%p", sb);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun /*
50*4882a593Smuzhiyun * update superblock and close log
51*4882a593Smuzhiyun *
52*4882a593Smuzhiyun * if mounted read-write and log based recovery was enabled
53*4882a593Smuzhiyun */
54*4882a593Smuzhiyun if ((log = sbi->log))
55*4882a593Smuzhiyun /*
56*4882a593Smuzhiyun * Wait for outstanding transactions to be written to log:
57*4882a593Smuzhiyun */
58*4882a593Smuzhiyun jfs_flush_journal(log, 2);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun /*
61*4882a593Smuzhiyun * close fileset inode allocation map (aka fileset inode)
62*4882a593Smuzhiyun */
63*4882a593Smuzhiyun diUnmount(ipimap, 0);
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun diFreeSpecial(ipimap);
66*4882a593Smuzhiyun sbi->ipimap = NULL;
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun /*
69*4882a593Smuzhiyun * close secondary aggregate inode allocation map
70*4882a593Smuzhiyun */
71*4882a593Smuzhiyun ipaimap2 = sbi->ipaimap2;
72*4882a593Smuzhiyun if (ipaimap2) {
73*4882a593Smuzhiyun diUnmount(ipaimap2, 0);
74*4882a593Smuzhiyun diFreeSpecial(ipaimap2);
75*4882a593Smuzhiyun sbi->ipaimap2 = NULL;
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun /*
79*4882a593Smuzhiyun * close aggregate inode allocation map
80*4882a593Smuzhiyun */
81*4882a593Smuzhiyun ipaimap = sbi->ipaimap;
82*4882a593Smuzhiyun diUnmount(ipaimap, 0);
83*4882a593Smuzhiyun diFreeSpecial(ipaimap);
84*4882a593Smuzhiyun sbi->ipaimap = NULL;
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun /*
87*4882a593Smuzhiyun * close aggregate block allocation map
88*4882a593Smuzhiyun */
89*4882a593Smuzhiyun dbUnmount(ipbmap, 0);
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun diFreeSpecial(ipbmap);
92*4882a593Smuzhiyun sbi->ipimap = NULL;
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun /*
95*4882a593Smuzhiyun * Make sure all metadata makes it to disk before we mark
96*4882a593Smuzhiyun * the superblock as clean
97*4882a593Smuzhiyun */
98*4882a593Smuzhiyun filemap_write_and_wait(sbi->direct_inode->i_mapping);
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun /*
101*4882a593Smuzhiyun * ensure all file system file pages are propagated to their
102*4882a593Smuzhiyun * home blocks on disk (and their in-memory buffer pages are
103*4882a593Smuzhiyun * invalidated) BEFORE updating file system superblock state
104*4882a593Smuzhiyun * (to signify file system is unmounted cleanly, and thus in
105*4882a593Smuzhiyun * consistent state) and log superblock active file system
106*4882a593Smuzhiyun * list (to signify skip logredo()).
107*4882a593Smuzhiyun */
108*4882a593Smuzhiyun if (log) { /* log = NULL if read-only mount */
109*4882a593Smuzhiyun updateSuper(sb, FM_CLEAN);
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun /*
112*4882a593Smuzhiyun * close log:
113*4882a593Smuzhiyun *
114*4882a593Smuzhiyun * remove file system from log active file system list.
115*4882a593Smuzhiyun */
116*4882a593Smuzhiyun rc = lmLogClose(sb);
117*4882a593Smuzhiyun }
118*4882a593Smuzhiyun jfs_info("UnMount JFS Complete: rc = %d", rc);
119*4882a593Smuzhiyun return rc;
120*4882a593Smuzhiyun }
121*4882a593Smuzhiyun
122*4882a593Smuzhiyun
jfs_umount_rw(struct super_block * sb)123*4882a593Smuzhiyun int jfs_umount_rw(struct super_block *sb)
124*4882a593Smuzhiyun {
125*4882a593Smuzhiyun struct jfs_sb_info *sbi = JFS_SBI(sb);
126*4882a593Smuzhiyun struct jfs_log *log = sbi->log;
127*4882a593Smuzhiyun
128*4882a593Smuzhiyun if (!log)
129*4882a593Smuzhiyun return 0;
130*4882a593Smuzhiyun
131*4882a593Smuzhiyun /*
132*4882a593Smuzhiyun * close log:
133*4882a593Smuzhiyun *
134*4882a593Smuzhiyun * remove file system from log active file system list.
135*4882a593Smuzhiyun */
136*4882a593Smuzhiyun jfs_flush_journal(log, 2);
137*4882a593Smuzhiyun
138*4882a593Smuzhiyun /*
139*4882a593Smuzhiyun * Make sure all metadata makes it to disk
140*4882a593Smuzhiyun */
141*4882a593Smuzhiyun dbSync(sbi->ipbmap);
142*4882a593Smuzhiyun diSync(sbi->ipimap);
143*4882a593Smuzhiyun
144*4882a593Smuzhiyun /*
145*4882a593Smuzhiyun * Note that we have to do this even if sync_blockdev() will
146*4882a593Smuzhiyun * do exactly the same a few instructions later: We can't
147*4882a593Smuzhiyun * mark the superblock clean before everything is flushed to
148*4882a593Smuzhiyun * disk.
149*4882a593Smuzhiyun */
150*4882a593Smuzhiyun filemap_write_and_wait(sbi->direct_inode->i_mapping);
151*4882a593Smuzhiyun
152*4882a593Smuzhiyun updateSuper(sb, FM_CLEAN);
153*4882a593Smuzhiyun
154*4882a593Smuzhiyun return lmLogClose(sb);
155*4882a593Smuzhiyun }
156