| 1 | /*
|
|---|
| 2 | * Copyright (c) 2011 Frantisek Princ
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup libext4
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 |
|
|---|
| 33 | #ifndef LIBEXT4_LIBEXT4_BLOCK_GROUP_H_
|
|---|
| 34 | #define LIBEXT4_LIBEXT4_BLOCK_GROUP_H_
|
|---|
| 35 |
|
|---|
| 36 | #include <sys/types.h>
|
|---|
| 37 |
|
|---|
| 38 | /*
|
|---|
| 39 | * Structure of a blocks group descriptor
|
|---|
| 40 | */
|
|---|
| 41 | typedef struct ext4_block_group {
|
|---|
| 42 | uint32_t bg_block_bitmap_lo; // Blocks bitmap block
|
|---|
| 43 | uint32_t bg_inode_bitmap_lo; // Inodes bitmap block
|
|---|
| 44 | uint32_t bg_inode_table_lo; // Inodes table block
|
|---|
| 45 | uint16_t bg_free_blocks_count_lo; // Free blocks count
|
|---|
| 46 | uint16_t bg_free_inodes_count_lo; // Free inodes count
|
|---|
| 47 | uint16_t bg_used_dirs_count_lo; // Directories count
|
|---|
| 48 | uint16_t bg_flags; // EXT4_BG_flags (INODE_UNINIT, etc)
|
|---|
| 49 | uint32_t bg_reserved[2]; // Likely block/inode bitmap checksum
|
|---|
| 50 | uint16_t bg_itable_unused_lo; // Unused inodes count
|
|---|
| 51 | uint16_t bg_checksum; // crc16(sb_uuid+group+desc)
|
|---|
| 52 | uint32_t bg_block_bitmap_hi; // Blocks bitmap block MSB
|
|---|
| 53 | uint32_t bg_inode_bitmap_hi; // Inodes bitmap block MSB
|
|---|
| 54 | uint32_t bg_inode_table_hi; // Inodes table block MSB
|
|---|
| 55 | uint16_t bg_free_blocks_count_hi; // Free blocks count MSB
|
|---|
| 56 | uint16_t bg_free_inodes_count_hi; // Free inodes count MSB
|
|---|
| 57 | uint16_t bg_used_dirs_count_hi; // Directories count MSB
|
|---|
| 58 | uint16_t bg_itable_unused_hi; // Unused inodes count MSB
|
|---|
| 59 | uint32_t bg_reserved2[3]; // Padding
|
|---|
| 60 | } ext4_group_desc_t;
|
|---|
| 61 |
|
|---|
| 62 | #endif
|
|---|
| 63 |
|
|---|
| 64 | /**
|
|---|
| 65 | * @}
|
|---|
| 66 | */
|
|---|
