LXR busybox/e2fsprogs/old_e2fsprogs/ext2fs/freefs.c

   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