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