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gerrit.nordix.org / codeaurora / busybox / c1ef7bdd8d002ae0889efcf883d0e1b7faa938d4 / . / e2fsprogs / ext2fs / freefs.c
blob: 3fd51f2579e1da216fa58828bb8146e533475511 [file] [log] [blame]
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]1/*
2 * freefs.c --- free an ext2 filesystem
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame^]3 *
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]4 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12#include <stdio.h>
13#if HAVE_UNISTD_H
14#include <unistd.h>
15#endif
16
17#include "ext2_fs.h"
18#include "ext2fsP.h"
19
20static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache);
21
22void ext2fs_free(ext2_filsys fs)
23{
24 if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS))
25 return;
26 if (fs->image_io != fs->io) {
27 if (fs->image_io)
28 io_channel_close(fs->image_io);
29 }
30 if (fs->io) {
31 io_channel_close(fs->io);
32 }
33 if (fs->device_name)
34 ext2fs_free_mem(&fs->device_name);
35 if (fs->super)
36 ext2fs_free_mem(&fs->super);
37 if (fs->orig_super)
38 ext2fs_free_mem(&fs->orig_super);
39 if (fs->group_desc)
40 ext2fs_free_mem(&fs->group_desc);
41 if (fs->block_map)
42 ext2fs_free_block_bitmap(fs->block_map);
43 if (fs->inode_map)
44 ext2fs_free_inode_bitmap(fs->inode_map);
45
46 if (fs->badblocks)
47 ext2fs_badblocks_list_free(fs->badblocks);
48 fs->badblocks = 0;
49
50 if (fs->dblist)
51 ext2fs_free_dblist(fs->dblist);
52
53 if (fs->icache)
54 ext2fs_free_inode_cache(fs->icache);
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame^]55
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]56 fs->magic = 0;
57
58 ext2fs_free_mem(&fs);
59}
60
61void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap)
62{
63 if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_GENERIC_BITMAP))
64 return;
65
66 bitmap->magic = 0;
67 if (bitmap->description) {
68 ext2fs_free_mem(&bitmap->description);
69 bitmap->description = 0;
70 }
71 if (bitmap->bitmap) {
72 ext2fs_free_mem(&bitmap->bitmap);
73 bitmap->bitmap = 0;
74 }
75 ext2fs_free_mem(&bitmap);
76}
77
78void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
79{
80 if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_INODE_BITMAP))
81 return;
82
83 bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
84 ext2fs_free_generic_bitmap(bitmap);
85}
86
87void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
88{
89 if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_BLOCK_BITMAP))
90 return;
91
92 bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
93 ext2fs_free_generic_bitmap(bitmap);
94}
95
96/*
97 * Free the inode cache structure
98 */
99static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache)
100{
101 if (--icache->refcount)
102 return;
103 if (icache->buffer)
104 ext2fs_free_mem(&icache->buffer);
105 if (icache->cache)
106 ext2fs_free_mem(&icache->cache);
107 icache->buffer_blk = 0;
108 ext2fs_free_mem(&icache);
109}
110
111/*
112 * This procedure frees a badblocks list.
113 */
114void ext2fs_u32_list_free(ext2_u32_list bb)
115{
116 if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
117 return;
118
119 if (bb->list)
120 ext2fs_free_mem(&bb->list);
121 bb->list = 0;
122 ext2fs_free_mem(&bb);
123}
124
125void ext2fs_badblocks_list_free(ext2_badblocks_list bb)
126{
127 ext2fs_u32_list_free((ext2_u32_list) bb);
128}
129
130
131/*
132 * Free a directory block list
133 */
134void ext2fs_free_dblist(ext2_dblist dblist)
135{
136 if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST))
137 return;
138
139 if (dblist->list)
140 ext2fs_free_mem(&dblist->list);
141 dblist->list = 0;
142 if (dblist->fs && dblist->fs->dblist == dblist)
143 dblist->fs->dblist = 0;
144 dblist->magic = 0;
145 ext2fs_free_mem(&dblist);
146}
147