1/* vi: set sw=4 ts=4: */ 2/* 3 * freefs.c --- free an ext2 filesystem 4 * 5 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o. 6 * 7 * %Begin-Header% 8 * This file may be redistributed under the terms of the GNU Public 9 * License. 10 * %End-Header% 11 */ 12 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 21static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache); 22 23void ext2fs_free(ext2_filsys fs) 24{ 25 if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)) 26 return; 27 if (fs->image_io != fs->io) { 28 if (fs->image_io) 29 io_channel_close(fs->image_io); 30 } 31 if (fs->io) { 32 io_channel_close(fs->io); 33 } 34 ext2fs_free_mem(&fs->device_name); 35 ext2fs_free_mem(&fs->super); 36 ext2fs_free_mem(&fs->orig_super); 37 ext2fs_free_mem(&fs->group_desc); 38 ext2fs_free_block_bitmap(fs->block_map); 39 ext2fs_free_inode_bitmap(fs->inode_map); 40 41 ext2fs_badblocks_list_free(fs->badblocks); 42 fs->badblocks = 0; 43 44 ext2fs_free_dblist(fs->dblist); 45 46 if (fs->icache) 47 ext2fs_free_inode_cache(fs->icache); 48 49 fs->magic = 0; 50 51 ext2fs_free_mem(&fs); 52} 53 54void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap) 55{ 56 if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_GENERIC_BITMAP)) 57 return; 58 59 bitmap->magic = 0; 60 ext2fs_free_mem(&bitmap->description); 61 ext2fs_free_mem(&bitmap->bitmap); 62 ext2fs_free_mem(&bitmap); 63} 64 65void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap) 66{ 67 if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_INODE_BITMAP)) 68 return; 69 70 bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP; 71 ext2fs_free_generic_bitmap(bitmap); 72} 73 74void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap) 75{ 76 if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_BLOCK_BITMAP)) 77 return; 78 79 bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP; 80 ext2fs_free_generic_bitmap(bitmap); 81} 82 83/* 84 * Free the inode cache structure 85 */ 86static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache) 87{ 88 if (--icache->refcount) 89 return; 90 ext2fs_free_mem(&icache->buffer); 91 ext2fs_free_mem(&icache->cache); 92 icache->buffer_blk = 0; 93 ext2fs_free_mem(&icache); 94} 95 96/* 97 * This procedure frees a badblocks list. 98 */ 99void ext2fs_u32_list_free(ext2_u32_list bb) 100{ 101 if (!bb || bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST) 102 return; 103 104 ext2fs_free_mem(&bb->list); 105 ext2fs_free_mem(&bb); 106} 107 108void ext2fs_badblocks_list_free(ext2_badblocks_list bb) 109{ 110 ext2fs_u32_list_free((ext2_u32_list) bb); 111} 112 113 114/* 115 * Free a directory block list 116 */ 117void ext2fs_free_dblist(ext2_dblist dblist) 118{ 119 if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST)) 120 return; 121 122 ext2fs_free_mem(&dblist->list); 123 if (dblist->fs && dblist->fs->dblist == dblist) 124 dblist->fs->dblist = 0; 125 dblist->magic = 0; 126 ext2fs_free_mem(&dblist); 127} 128