| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 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 | static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache); |
| 22 | |
| 23 | void ext2fs_free(ext2_filsys fs) |
| 24 | { |
| 25 | if (!fs || (fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)) |
| 26 | return; |
| 27 | if (fs->image_io != fs->io) { |
| 28 | if (fs->image_io) |
| 29 | io_channel_close(fs->image_io); |
| 30 | } |
| 31 | if (fs->io) { |
| 32 | io_channel_close(fs->io); |
| 33 | } |
| 34 | if (fs->device_name) |
| 35 | ext2fs_free_mem(&fs->device_name); |
| 36 | if (fs->super) |
| 37 | ext2fs_free_mem(&fs->super); |
| 38 | if (fs->orig_super) |
| 39 | ext2fs_free_mem(&fs->orig_super); |
| 40 | if (fs->group_desc) |
| 41 | ext2fs_free_mem(&fs->group_desc); |
| 42 | if (fs->block_map) |
| 43 | ext2fs_free_block_bitmap(fs->block_map); |
| 44 | if (fs->inode_map) |
| 45 | ext2fs_free_inode_bitmap(fs->inode_map); |
| 46 | if (fs->image_header) |
| 47 | ext2fs_free_mem(&fs->image_header); |
| 48 | |
| 49 | if (fs->badblocks) |
| 50 | ext2fs_badblocks_list_free(fs->badblocks); |
| 51 | fs->badblocks = 0; |
| 52 | |
| 53 | if (fs->dblist) |
| 54 | ext2fs_free_dblist(fs->dblist); |
| 55 | |
| 56 | if (fs->icache) |
| 57 | ext2fs_free_inode_cache(fs->icache); |
| 58 | |
| 59 | if (fs->mmp_buf) |
| 60 | ext2fs_free_mem(&fs->mmp_buf); |
| 61 | if (fs->mmp_cmp) |
| 62 | ext2fs_free_mem(&fs->mmp_cmp); |
| 63 | |
| 64 | fs->magic = 0; |
| 65 | |
| 66 | ext2fs_free_mem(&fs); |
| 67 | } |
| 68 | |
| 69 | /* |
| 70 | * Free the inode cache structure |
| 71 | */ |
| 72 | static void ext2fs_free_inode_cache(struct ext2_inode_cache *icache) |
| 73 | { |
| 74 | if (--icache->refcount) |
| 75 | return; |
| 76 | if (icache->buffer) |
| 77 | ext2fs_free_mem(&icache->buffer); |
| 78 | if (icache->cache) |
| 79 | ext2fs_free_mem(&icache->cache); |
| 80 | icache->buffer_blk = 0; |
| 81 | ext2fs_free_mem(&icache); |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * This procedure frees a badblocks list. |
| 86 | */ |
| 87 | void ext2fs_u32_list_free(ext2_u32_list bb) |
| 88 | { |
| 89 | if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST) |
| 90 | return; |
| 91 | |
| 92 | if (bb->list) |
| 93 | ext2fs_free_mem(&bb->list); |
| 94 | bb->list = 0; |
| 95 | ext2fs_free_mem(&bb); |
| 96 | } |
| 97 | |
| 98 | void ext2fs_badblocks_list_free(ext2_badblocks_list bb) |
| 99 | { |
| 100 | ext2fs_u32_list_free((ext2_u32_list) bb); |
| 101 | } |
| 102 | |
| 103 | |
| 104 | /* |
| 105 | * Free a directory block list |
| 106 | */ |
| 107 | void ext2fs_free_dblist(ext2_dblist dblist) |
| 108 | { |
| 109 | if (!dblist || (dblist->magic != EXT2_ET_MAGIC_DBLIST)) |
| 110 | return; |
| 111 | |
| 112 | if (dblist->list) |
| 113 | ext2fs_free_mem(&dblist->list); |
| 114 | dblist->list = 0; |
| 115 | if (dblist->fs && dblist->fs->dblist == dblist) |
| 116 | dblist->fs->dblist = 0; |
| 117 | dblist->magic = 0; |
| 118 | ext2fs_free_mem(&dblist); |
| 119 | } |
| 120 | |