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 if (fs->image_header) 45 ext2fs_free_mem(&fs->image_header); 46 47 if (fs->badblocks) 48 ext2fs_badblocks_list_free(fs->badblocks); 49 fs->badblocks = 0; 50 51 if (fs->dblist) 52 ext2fs_free_dblist(fs->dblist); 53 54 if (fs->icache) 55 ext2fs_free_inode_cache(fs->icache); 56 57 if (fs->mmp_buf) 58 ext2fs_free_mem(&fs->mmp_buf); 59 if (fs->mmp_cmp) 60 ext2fs_free_mem(&fs->mmp_cmp); 61 62 fs->magic = 0; 63 64 ext2fs_zero_blocks2(NULL, 0, 0, NULL, NULL); 65 ext2fs_free_mem(&fs); 66 } 67 68 /* 69 * This procedure frees a badblocks list. 70 */ 71 void ext2fs_u32_list_free(ext2_u32_list bb) 72 { 73 if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST) 74 return; 75 76 if (bb->list) 77 ext2fs_free_mem(&bb->list); 78 bb->list = 0; 79 ext2fs_free_mem(&bb); 80 } 81 82 void ext2fs_badblocks_list_free(ext2_badblocks_list bb) 83 { 84 ext2fs_u32_list_free((ext2_u32_list) bb); 85 } 86 87 88 /* 89 * Free a directory block list 90 */ 91 void ext2fs_free_dblist(ext2_dblist dblist) 92 { 93 if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST)) 94 return; 95 96 if (dblist->list) 97 ext2fs_free_mem(&dblist->list); 98 dblist->list = 0; 99 if (dblist->fs && dblist->fs->dblist == dblist) 100 dblist->fs->dblist = 0; 101 dblist->magic = 0; 102 ext2fs_free_mem(&dblist); 103 } 104 105
