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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 
ext2fs_free(ext2_filsys fs)21 void ext2fs_free(ext2_filsys fs)
22 {
23 	if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS))
24 		return;
25 	if (fs->image_io != fs->io) {
26 		if (fs->image_io)
27 			io_channel_close(fs->image_io);
28 	}
29 	if (fs->io) {
30 		io_channel_close(fs->io);
31 	}
32 	if (fs->device_name)
33 		ext2fs_free_mem(&fs->device_name);
34 	if (fs->super)
35 		ext2fs_free_mem(&fs->super);
36 	if (fs->orig_super)
37 		ext2fs_free_mem(&fs->orig_super);
38 	if (fs->group_desc)
39 		ext2fs_free_mem(&fs->group_desc);
40 	if (fs->block_map)
41 		ext2fs_free_block_bitmap(fs->block_map);
42 	if (fs->inode_map)
43 		ext2fs_free_inode_bitmap(fs->inode_map);
44 	if (fs->image_header)
45 		ext2fs_free_mem(&fs->image_header);
46 
47 	if (fs->badblocks)
48 		ext2fs_badblocks_list_free(fs->badblocks);
49 	fs->badblocks = 0;
50 
51 	if (fs->dblist)
52 		ext2fs_free_dblist(fs->dblist);
53 
54 	if (fs->icache)
55 		ext2fs_free_inode_cache(fs->icache);
56 
57 	if (fs->mmp_buf)
58 		ext2fs_free_mem(&fs->mmp_buf);
59 	if (fs->mmp_cmp)
60 		ext2fs_free_mem(&fs->mmp_cmp);
61 
62 	fs->magic = 0;
63 
64 	ext2fs_zero_blocks2(NULL, 0, 0, NULL, NULL);
65 	ext2fs_free_mem(&fs);
66 }
67 
68 /*
69  * This procedure frees a badblocks list.
70  */
ext2fs_u32_list_free(ext2_u32_list bb)71 void ext2fs_u32_list_free(ext2_u32_list bb)
72 {
73 	if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
74 		return;
75 
76 	if (bb->list)
77 		ext2fs_free_mem(&bb->list);
78 	bb->list = 0;
79 	ext2fs_free_mem(&bb);
80 }
81 
ext2fs_badblocks_list_free(ext2_badblocks_list bb)82 void ext2fs_badblocks_list_free(ext2_badblocks_list bb)
83 {
84 	ext2fs_u32_list_free((ext2_u32_list) bb);
85 }
86 
87 
88 /*
89  * Free a directory block list
90  */
ext2fs_free_dblist(ext2_dblist dblist)91 void ext2fs_free_dblist(ext2_dblist dblist)
92 {
93 	if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST))
94 		return;
95 
96 	if (dblist->list)
97 		ext2fs_free_mem(&dblist->list);
98 	dblist->list = 0;
99 	if (dblist->fs && dblist->fs->dblist == dblist)
100 		dblist->fs->dblist = 0;
101 	dblist->magic = 0;
102 	ext2fs_free_mem(&dblist);
103 }
104 
105