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/*
* freefs.c --- free an ext2 filesystem
*
* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
#include <stdio.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "ext2_fs.h"
#include "ext2fsP.h"
static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache);
void ext2fs_free(ext2_filsys fs)
{
if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS))
return;
if (fs->image_io != fs->io) {
if (fs->image_io)
io_channel_close(fs->image_io);
}
if (fs->io) {
io_channel_close(fs->io);
}
if (fs->device_name)
ext2fs_free_mem(&fs->device_name);
if (fs->super)
ext2fs_free_mem(&fs->super);
if (fs->orig_super)
ext2fs_free_mem(&fs->orig_super);
if (fs->group_desc)
ext2fs_free_mem(&fs->group_desc);
if (fs->block_map)
ext2fs_free_block_bitmap(fs->block_map);
if (fs->inode_map)
ext2fs_free_inode_bitmap(fs->inode_map);
if (fs->badblocks)
ext2fs_badblocks_list_free(fs->badblocks);
fs->badblocks = 0;
if (fs->dblist)
ext2fs_free_dblist(fs->dblist);
if (fs->icache)
ext2fs_free_inode_cache(fs->icache);
fs->magic = 0;
ext2fs_free_mem(&fs);
}
void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap)
{
if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_GENERIC_BITMAP))
return;
bitmap->magic = 0;
if (bitmap->description) {
ext2fs_free_mem(&bitmap->description);
bitmap->description = 0;
}
if (bitmap->bitmap) {
ext2fs_free_mem(&bitmap->bitmap);
bitmap->bitmap = 0;
}
ext2fs_free_mem(&bitmap);
}
void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
{
if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_INODE_BITMAP))
return;
bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
ext2fs_free_generic_bitmap(bitmap);
}
void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
{
if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_BLOCK_BITMAP))
return;
bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
ext2fs_free_generic_bitmap(bitmap);
}
/*
* Free the inode cache structure
*/
static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache)
{
if (--icache->refcount)
return;
if (icache->buffer)
ext2fs_free_mem(&icache->buffer);
if (icache->cache)
ext2fs_free_mem(&icache->cache);
icache->buffer_blk = 0;
ext2fs_free_mem(&icache);
}
/*
* This procedure frees a badblocks list.
*/
void ext2fs_u32_list_free(ext2_u32_list bb)
{
if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
return;
if (bb->list)
ext2fs_free_mem(&bb->list);
bb->list = 0;
ext2fs_free_mem(&bb);
}
void ext2fs_badblocks_list_free(ext2_badblocks_list bb)
{
ext2fs_u32_list_free((ext2_u32_list) bb);
}
/*
* Free a directory block list
*/
void ext2fs_free_dblist(ext2_dblist dblist)
{
if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST))
return;
if (dblist->list)
ext2fs_free_mem(&dblist->list);
dblist->list = 0;
if (dblist->fs && dblist->fs->dblist == dblist)
dblist->fs->dblist = 0;
dblist->magic = 0;
ext2fs_free_mem(&dblist);
}
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