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Commit | Line | Data |
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3839e657 TT |
1 | /* |
2 | * closefs.c --- close an ext2 filesystem | |
3 | * | |
4 | * Copyright (C) 1993, 1994 Theodore Ts'o. This file may be redistributed | |
5 | * under the terms of the GNU Public License. | |
6 | */ | |
7 | ||
8 | #include <stdio.h> | |
9 | #include <unistd.h> | |
10 | #include <stdlib.h> | |
11 | #include <time.h> | |
12 | ||
3839e657 TT |
13 | #include <linux/ext2_fs.h> |
14 | ||
15 | #include "ext2fs.h" | |
16 | ||
17 | errcode_t ext2fs_flush(ext2_filsys fs) | |
18 | { | |
19 | int i,j; | |
20 | int group_block; | |
21 | errcode_t retval; | |
22 | char *group_ptr; | |
f3db3566 | 23 | unsigned long fs_state; |
3839e657 | 24 | |
f3db3566 TT |
25 | EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); |
26 | ||
3839e657 TT |
27 | /* |
28 | * Write out master superblock. This has to be done | |
29 | * separately, since it is located at a fixed location | |
30 | * (SUPERBLOCK_OFFSET). | |
31 | */ | |
32 | fs->super->s_wtime = time(NULL); | |
33 | io_channel_set_blksize(fs->io, SUPERBLOCK_OFFSET); | |
34 | retval = io_channel_write_blk(fs->io, 1, -SUPERBLOCK_SIZE, fs->super); | |
35 | if (retval) | |
36 | return retval; | |
37 | io_channel_set_blksize(fs->io, fs->blocksize); | |
38 | ||
f3db3566 TT |
39 | /* |
40 | * Save the state of the FS and set it to non valid for the | |
41 | * backup superblocks | |
42 | */ | |
43 | fs_state = fs->super->s_state; | |
44 | fs->super->s_state &= ~EXT2_VALID_FS; | |
45 | ||
3839e657 TT |
46 | /* |
47 | * Write out the master group descriptors, and the backup | |
48 | * superblocks and group descriptors. | |
49 | */ | |
50 | group_block = fs->super->s_first_data_block; | |
51 | for (i = 0; i < fs->group_desc_count; i++) { | |
52 | if (i !=0 ) { | |
53 | retval = io_channel_write_blk(fs->io, group_block, | |
54 | -SUPERBLOCK_SIZE, | |
55 | fs->super); | |
f3db3566 TT |
56 | if (retval) { |
57 | fs->super->s_state = fs_state; | |
3839e657 | 58 | return retval; |
f3db3566 | 59 | } |
3839e657 TT |
60 | } |
61 | group_ptr = (char *) fs->group_desc; | |
62 | for (j=0; j < fs->desc_blocks; j++) { | |
63 | retval = io_channel_write_blk(fs->io, | |
64 | group_block+1+j, 1, | |
65 | group_ptr); | |
f3db3566 TT |
66 | if (retval) { |
67 | fs->super->s_state = fs_state; | |
3839e657 | 68 | return retval; |
f3db3566 | 69 | } |
3839e657 TT |
70 | group_ptr += fs->blocksize; |
71 | } | |
72 | group_block += EXT2_BLOCKS_PER_GROUP(fs->super); | |
73 | } | |
74 | ||
f3db3566 TT |
75 | fs->super->s_state = fs_state; |
76 | ||
3839e657 TT |
77 | /* |
78 | * If the write_bitmaps() function is present, call it to | |
79 | * flush the bitmaps. This is done this way so that a simple | |
80 | * program that doesn't mess with the bitmaps doesn't need to | |
81 | * drag in the bitmaps.c code. | |
82 | */ | |
83 | if (fs->write_bitmaps) { | |
84 | retval = fs->write_bitmaps(fs); | |
85 | if (retval) | |
86 | return retval; | |
87 | } | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | errcode_t ext2fs_close(ext2_filsys fs) | |
93 | { | |
94 | errcode_t retval; | |
95 | ||
f3db3566 TT |
96 | EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); |
97 | ||
3839e657 TT |
98 | if (fs->flags & EXT2_FLAG_DIRTY) { |
99 | retval = ext2fs_flush(fs); | |
100 | if (retval) | |
101 | return retval; | |
102 | } | |
103 | ext2fs_free(fs); | |
104 | return 0; | |
105 | } |