[821] | 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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