| /* |
| * 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 <linux/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->io) { |
| io_channel_close(fs->io); |
| } |
| if (fs->device_name) |
| ext2fs_free_mem((void **) &fs->device_name); |
| if (fs->super) |
| ext2fs_free_mem((void **) &fs->super); |
| if (fs->group_desc) |
| ext2fs_free_mem((void **) &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) |
| 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((void **) &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((void **) &bitmap->description); |
| bitmap->description = 0; |
| } |
| if (bitmap->bitmap) { |
| ext2fs_free_mem((void **) &bitmap->bitmap); |
| bitmap->bitmap = 0; |
| } |
| ext2fs_free_mem((void **) &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((void **) &icache->buffer); |
| if (icache->cache) |
| ext2fs_free_mem((void **) &icache->cache); |
| icache->buffer_blk = 0; |
| ext2fs_free_mem((void **) &icache); |
| } |
| |
| /* |
| * This procedure frees a badblocks list. |
| */ |
| void ext2fs_badblocks_list_free(ext2_badblocks_list bb) |
| { |
| if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST) |
| return; |
| |
| if (bb->list) |
| ext2fs_free_mem((void **) &bb->list); |
| bb->list = 0; |
| ext2fs_free_mem((void **) &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((void **) &dblist->list); |
| dblist->list = 0; |
| if (dblist->fs && dblist->fs->dblist == dblist) |
| dblist->fs->dblist = 0; |
| dblist->magic = 0; |
| ext2fs_free_mem((void **) &dblist); |
| } |
| |