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 #include "hashmap.h"
  21
  22 void ext2fs_free(ext2_filsys fs)
  23 {
  24         if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS))
  25                 return;
  26         if (fs->image_io != fs->io) {
  27                 if (fs->image_io)
  28                         io_channel_close(fs->image_io);
  29         }
  30         if (fs->io) {
  31                 io_channel_close(fs->io);
  32         }
  33         if (fs->device_name)
  34                 ext2fs_free_mem(&fs->device_name);
  35         if (fs->super)
  36                 ext2fs_free_mem(&fs->super);
  37         if (fs->orig_super)
  38                 ext2fs_free_mem(&fs->orig_super);
  39         if (fs->group_desc)
  40                 ext2fs_free_mem(&fs->group_desc);
  41         if (fs->block_map)
  42                 ext2fs_free_block_bitmap(fs->block_map);
  43         if (fs->inode_map)
  44                 ext2fs_free_inode_bitmap(fs->inode_map);
  45         if (fs->image_header)
  46                 ext2fs_free_mem(&fs->image_header);
  47
  48         if (fs->badblocks)
  49                 ext2fs_badblocks_list_free(fs->badblocks);
  50         fs->badblocks = 0;
  51
  52         if (fs->dblist)
  53                 ext2fs_free_dblist(fs->dblist);
  54
  55         if (fs->icache)
  56                 ext2fs_free_inode_cache(fs->icache);
  57
  58         if (fs->mmp_buf)
  59                 ext2fs_free_mem(&fs->mmp_buf);
  60         if (fs->mmp_cmp)
  61                 ext2fs_free_mem(&fs->mmp_cmp);
  62
  63         if (fs->block_sha_map)
  64                 ext2fs_hashmap_free(fs->block_sha_map);
  65
  66         fs->magic = 0;
  67
  68         ext2fs_zero_blocks2(NULL, 0, 0, NULL, NULL);
  69         ext2fs_free_mem(&fs);
  70 }
  71
  72 /*
  73  * This procedure frees a badblocks list.
  74  */
  75 void ext2fs_u32_list_free(ext2_u32_list bb)
  76 {
  77         if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
  78                 return;
  79
  80         if (bb->list)
  81                 ext2fs_free_mem(&bb->list);
  82         bb->list = 0;
  83         ext2fs_free_mem(&bb);
  84 }
  85
  86 void ext2fs_badblocks_list_free(ext2_badblocks_list bb)
  87 {
  88         ext2fs_u32_list_free((ext2_u32_list) bb);
  89 }
  90
  91
  92 /*
  93  * Free a directory block list
  94  */
  95 void ext2fs_free_dblist(ext2_dblist dblist)
  96 {
  97         if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST))
  98                 return;
  99
 100         if (dblist->list)
 101                 ext2fs_free_mem(&dblist->list);
 102         dblist->list = 0;
 103         if (dblist->fs && dblist->fs->dblist == dblist)
 104                 dblist->fs->dblist = 0;
 105         dblist->magic = 0;
 106         ext2fs_free_mem(&dblist);
 107 }
 108