lib/ext2fs/freefs.c

   1 /*
   2  * freefs.c --- free an ext2 filesystem
   3  *
   4  * Copyright (C) 1993, 1994 Theodore Ts'o.  This file may be redistributed
   5  * under the terms of the GNU Public License.
   6  */
   7
   8 #include <stdio.h>
   9 #include <unistd.h>
  10 #include <stdlib.h>
  11
  12 #include <linux/ext2_fs.h>
  13
  14 #include "ext2fs.h"
  15
  16 void ext2fs_free(ext2_filsys fs)
  17 {
  18         if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS))
  19                 return;
  20         if (fs->io) {
  21                 io_channel_close(fs->io);
  22         }
  23         if (fs->device_name)
  24                 free(fs->device_name);
  25         if (fs->super)
  26                 free(fs->super);
  27         if (fs->group_desc)
  28                 free(fs->group_desc);
  29         if (fs->block_map)
  30                 ext2fs_free_block_bitmap(fs->block_map);
  31         if (fs->inode_map)
  32                 ext2fs_free_inode_bitmap(fs->inode_map);
  33         free(fs);
  34 }
  35
  36 void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap)
  37 {
  38         if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_GENERIC_BITMAP))
  39                 return;
  40
  41         bitmap->magic = 0;
  42         if (bitmap->description) {
  43                 free(bitmap->description);
  44                 bitmap->description = 0;
  45         }
  46         if (bitmap->bitmap) {
  47                 free(bitmap->bitmap);
  48                 bitmap->bitmap = 0;
  49         }
  50         free(bitmap);
  51 }
  52
  53 void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
  54 {
  55         if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_INODE_BITMAP))
  56                 return;
  57
  58         bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
  59         ext2fs_free_generic_bitmap(bitmap);
  60 }
  61
  62 void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
  63 {
  64         if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_BLOCK_BITMAP))
  65                 return;
  66
  67         bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
  68         ext2fs_free_generic_bitmap(bitmap);
  69 }
  70