lib/ext2fs/freefs.c

   1 /*
   2  * freefs.c --- free an ext2 filesystem
   3  *
   4  * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Library
   8  * General Public License, version 2.
   9  * %End-Header%
  10  */
  11
  12 #include "config.h"
  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
  21 void ext2fs_free(ext2_filsys fs)
  22 {
  23         if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS))
  24                 return;
  25         if (fs->image_io != fs->io) {
  26                 if (fs->image_io)
  27                         io_channel_close(fs->image_io);
  28         }
  29         if (fs->io) {
  30                 io_channel_close(fs->io);
  31         }
  32         if (fs->device_name)
  33                 ext2fs_free_mem(&fs->device_name);
  34         if (fs->super)
  35                 ext2fs_free_mem(&fs->super);
  36         if (fs->orig_super)
  37                 ext2fs_free_mem(&fs->orig_super);
  38         if (fs->group_desc)
  39                 ext2fs_free_mem(&fs->group_desc);
  40         if (fs->block_map)
  41                 ext2fs_free_block_bitmap(fs->block_map);
  42         if (fs->inode_map)
  43                 ext2fs_free_inode_bitmap(fs->inode_map);
  44
  45         if (fs->badblocks)
  46                 ext2fs_badblocks_list_free(fs->badblocks);
  47         fs->badblocks = 0;
  48
  49         if (fs->dblist)
  50                 ext2fs_free_dblist(fs->dblist);
  51
  52         if (fs->icache)
  53                 ext2fs_free_inode_cache(fs->icache);
  54
  55         if (fs->mmp_buf)
  56                 ext2fs_free_mem(&fs->mmp_buf);
  57         if (fs->mmp_cmp)
  58                 ext2fs_free_mem(&fs->mmp_cmp);
  59
  60         fs->magic = 0;
  61
  62         ext2fs_free_mem(&fs);
  63 }
  64
  65 /*
  66  * This procedure frees a badblocks list.
  67  */
  68 void ext2fs_u32_list_free(ext2_u32_list bb)
  69 {
  70         if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
  71                 return;
  72
  73         if (bb->list)
  74                 ext2fs_free_mem(&bb->list);
  75         bb->list = 0;
  76         ext2fs_free_mem(&bb);
  77 }
  78
  79 void ext2fs_badblocks_list_free(ext2_badblocks_list bb)
  80 {
  81         ext2fs_u32_list_free((ext2_u32_list) bb);
  82 }
  83
  84
  85 /*
  86  * Free a directory block list
  87  */
  88 void ext2fs_free_dblist(ext2_dblist dblist)
  89 {
  90         if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST))
  91                 return;
  92
  93         if (dblist->list)
  94                 ext2fs_free_mem(&dblist->list);
  95         dblist->list = 0;
  96         if (dblist->fs && dblist->fs->dblist == dblist)
  97                 dblist->fs->dblist = 0;
  98         dblist->magic = 0;
  99         ext2fs_free_mem(&dblist);
 100 }
 101