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