From d1e063beb43e595680c65e3804d1f8ddff53373b Mon Sep 17 00:00:00 2001 From: Guido Guenther Date: Sat, 18 Nov 2006 23:48:07 +0100 Subject: Imported Debian version 0.3.8.8 --- e2fslib/freefs.c | 137 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 e2fslib/freefs.c (limited to 'e2fslib/freefs.c') diff --git a/e2fslib/freefs.c b/e2fslib/freefs.c new file mode 100644 index 0000000..5cb3cf8 --- /dev/null +++ b/e2fslib/freefs.c @@ -0,0 +1,137 @@ +/* + * 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 +#if HAVE_UNISTD_H +#include +#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->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->orig_super) + ext2fs_free_mem((void **) &fs->orig_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) + 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((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); +} + -- cgit v1.2.3