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 <stdio.h> 13 #if HAVE_UNISTD_H 14 #include <unistd.h> 15 #endif 16 17 #include "ext2_fs.h" 18 #include "ext2fsP.h" 19 20 static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache); 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 46 if (fs->badblocks) 47 ext2fs_badblocks_list_free(fs->badblocks); 48 fs->badblocks = 0; 49 50 if (fs->dblist) 51 ext2fs_free_dblist(fs->dblist); 52 53 if (fs->icache) 54 ext2fs_free_inode_cache(fs->icache); 55 56 fs->magic = 0; 57 58 ext2fs_free_mem(&fs); 59 } 60 61 /* 62 * Free the inode cache structure 63 */ 64 static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache) 65 { 66 if (--icache->refcount) 67 return; 68 if (icache->buffer) 69 ext2fs_free_mem(&icache->buffer); 70 if (icache->cache) 71 ext2fs_free_mem(&icache->cache); 72 icache->buffer_blk = 0; 73 ext2fs_free_mem(&icache); 74 } 75 76 /* 77 * This procedure frees a badblocks list. 78 */ 79 void ext2fs_u32_list_free(ext2_u32_list bb) 80 { 81 if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST) 82 return; 83 84 if (bb->list) 85 ext2fs_free_mem(&bb->list); 86 bb->list = 0; 87 ext2fs_free_mem(&bb); 88 } 89 90 void ext2fs_badblocks_list_free(ext2_badblocks_list bb) 91 { 92 ext2fs_u32_list_free((ext2_u32_list) bb); 93 } 94 95 96 /* 97 * Free a directory block list 98 */ 99 void ext2fs_free_dblist(ext2_dblist dblist) 100 { 101 if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST)) 102 return; 103 104 if (dblist->list) 105 ext2fs_free_mem(&dblist->list); 106 dblist->list = 0; 107 if (dblist->fs && dblist->fs->dblist == dblist) 108 dblist->fs->dblist = 0; 109 dblist->magic = 0; 110 ext2fs_free_mem(&dblist); 111 } 112 113
