summaryrefslogtreecommitdiff
path: root/e2fsprogs/ext2fs/freefs.c
blob: f0f7b3eec566da4554782deb29c27fe68cfcaca7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
/*
 * freefs.c --- free an ext2 filesystem
 *
 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
 *
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Public
 * License.
 * %End-Header%
 */

#include <stdio.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#include "ext2_fs.h"
#include "ext2fsP.h"

static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache);

void ext2fs_free(ext2_filsys fs)
{
	if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS))
		return;
	if (fs->image_io != fs->io) {
		if (fs->image_io)
			io_channel_close(fs->image_io);
	}
	if (fs->io) {
		io_channel_close(fs->io);
	}
	ext2fs_free_mem(&fs->device_name);
	ext2fs_free_mem(&fs->super);
	ext2fs_free_mem(&fs->orig_super);
	ext2fs_free_mem(&fs->group_desc);
	ext2fs_free_block_bitmap(fs->block_map);
	ext2fs_free_inode_bitmap(fs->inode_map);

	ext2fs_badblocks_list_free(fs->badblocks);
	fs->badblocks = 0;

	ext2fs_free_dblist(fs->dblist);

	if (fs->icache)
		ext2fs_free_inode_cache(fs->icache);

	fs->magic = 0;

	ext2fs_free_mem(&fs);
}

void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap)
{
	if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_GENERIC_BITMAP))
		return;

	bitmap->magic = 0;
	ext2fs_free_mem(&bitmap->description);
	ext2fs_free_mem(&bitmap->bitmap);
	ext2fs_free_mem(&bitmap);
}

void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
{
	if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_INODE_BITMAP))
		return;

	bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
	ext2fs_free_generic_bitmap(bitmap);
}

void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
{
	if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_BLOCK_BITMAP))
		return;

	bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
	ext2fs_free_generic_bitmap(bitmap);
}

/*
 * Free the inode cache structure
 */
static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache)
{
	if (--icache->refcount)
		return;
	ext2fs_free_mem(&icache->buffer);
	ext2fs_free_mem(&icache->cache);
	icache->buffer_blk = 0;
	ext2fs_free_mem(&icache);
}

/*
 * This procedure frees a badblocks list.
 */
void ext2fs_u32_list_free(ext2_u32_list bb)
{
	if (!bb || bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
		return;

	ext2fs_free_mem(&bb->list);
	ext2fs_free_mem(&bb);
}

void ext2fs_badblocks_list_free(ext2_badblocks_list bb)
{
	ext2fs_u32_list_free((ext2_u32_list) bb);
}


/*
 * Free a directory block list
 */
void ext2fs_free_dblist(ext2_dblist dblist)
{
	if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST))
		return;

	ext2fs_free_mem(&dblist->list);
	if (dblist->fs && dblist->fs->dblist == dblist)
		dblist->fs->dblist = 0;
	dblist->magic = 0;
	ext2fs_free_mem(&dblist);
}