1/*
2 * freefs.c --- free an ext2 filesystem
3 *
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 Library
8 * General Public License, version 2.
9 * %End-Header%
10 */
11
12#include "config.h"
13#include <stdio.h>
14#if HAVE_UNISTD_H
15#include <unistd.h>
16#endif
17
18#include "ext2_fs.h"
19#include "ext2fsP.h"
20#include "hashmap.h"
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	if (fs->image_header)
46		ext2fs_free_mem(&fs->image_header);
47
48	if (fs->badblocks)
49		ext2fs_badblocks_list_free(fs->badblocks);
50	fs->badblocks = 0;
51
52	if (fs->dblist)
53		ext2fs_free_dblist(fs->dblist);
54
55	if (fs->icache)
56		ext2fs_free_inode_cache(fs->icache);
57
58	if (fs->mmp_buf)
59		ext2fs_free_mem(&fs->mmp_buf);
60	if (fs->mmp_cmp)
61		ext2fs_free_mem(&fs->mmp_cmp);
62
63	if (fs->block_sha_map)
64		ext2fs_hashmap_free(fs->block_sha_map);
65
66	fs->magic = 0;
67
68	ext2fs_zero_blocks2(NULL, 0, 0, NULL, NULL);
69	ext2fs_free_mem(&fs);
70}
71
72/*
73 * This procedure frees a badblocks list.
74 */
75void ext2fs_u32_list_free(ext2_u32_list bb)
76{
77	if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
78		return;
79
80	if (bb->list)
81		ext2fs_free_mem(&bb->list);
82	bb->list = 0;
83	ext2fs_free_mem(&bb);
84}
85
86void ext2fs_badblocks_list_free(ext2_badblocks_list bb)
87{
88	ext2fs_u32_list_free((ext2_u32_list) bb);
89}
90
91
92/*
93 * Free a directory block list
94 */
95void ext2fs_free_dblist(ext2_dblist dblist)
96{
97	if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST))
98		return;
99
100	if (dblist->list)
101		ext2fs_free_mem(&dblist->list);
102	dblist->list = 0;
103	if (dblist->fs && dblist->fs->dblist == dblist)
104		dblist->fs->dblist = 0;
105	dblist->magic = 0;
106	ext2fs_free_mem(&dblist);
107}
108
109