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 <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	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	fs->magic = 0;
64
65	ext2fs_free_mem(&fs);
66}
67
68/*
69 * Free the inode cache structure
70 */
71static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache)
72{
73	if (--icache->refcount)
74		return;
75	if (icache->buffer)
76		ext2fs_free_mem(&icache->buffer);
77	if (icache->cache)
78		ext2fs_free_mem(&icache->cache);
79	icache->buffer_blk = 0;
80	ext2fs_free_mem(&icache);
81}
82
83/*
84 * This procedure frees a badblocks list.
85 */
86void ext2fs_u32_list_free(ext2_u32_list bb)
87{
88	if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
89		return;
90
91	if (bb->list)
92		ext2fs_free_mem(&bb->list);
93	bb->list = 0;
94	ext2fs_free_mem(&bb);
95}
96
97void ext2fs_badblocks_list_free(ext2_badblocks_list bb)
98{
99	ext2fs_u32_list_free((ext2_u32_list) bb);
100}
101
102
103/*
104 * Free a directory block list
105 */
106void ext2fs_free_dblist(ext2_dblist dblist)
107{
108	if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST))
109		return;
110
111	if (dblist->list)
112		ext2fs_free_mem(&dblist->list);
113	dblist->list = 0;
114	if (dblist->fs && dblist->fs->dblist == dblist)
115		dblist->fs->dblist = 0;
116	dblist->magic = 0;
117	ext2fs_free_mem(&dblist);
118}
119
120