119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * linux/include/linux/ext2_fs.h 319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Copyright (C) 1992, 1993, 1994, 1995 519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Remy Card (card@masi.ibp.fr) 619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Laboratoire MASI - Institut Blaise Pascal 719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Universite Pierre et Marie Curie (Paris VI) 819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * from 1019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 1119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * linux/include/linux/minix_fs.h 1219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 1319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Copyright (C) 1991, 1992 Linus Torvalds 1419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 1519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 1619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifndef _LINUX_EXT2_FS_H 1719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define _LINUX_EXT2_FS_H 1819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 1919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#include <ext2fs/ext2_types.h> /* Changed from linux/types.h */ 2019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 2119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 2219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * The second extended filesystem constants/structures 2319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 2419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 2519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 2619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Define EXT2FS_DEBUG to produce debug messages 2719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 2819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#undef EXT2FS_DEBUG 2919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 3019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 3119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files 3219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 3319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_PREALLOCATE 3419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFAULT_PREALLOC_BLOCKS 8 3519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 3619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 3719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * The second extended file system version 3819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 3919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2FS_DATE "95/08/09" 4019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2FS_VERSION "0.5b" 4119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 4219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 4319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Special inode numbers 4419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 4519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BAD_INO 1 /* Bad blocks inode */ 4619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ROOT_INO 2 /* Root inode */ 4719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ACL_IDX_INO 3 /* ACL inode */ 4819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ACL_DATA_INO 4 /* ACL inode */ 4919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ 5019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ 5119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_RESIZE_INO 7 /* Reserved group descriptors inode */ 5219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_JOURNAL_INO 8 /* Journal inode */ 5319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 5419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* First non-reserved inode for old ext2 filesystems */ 5519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_GOOD_OLD_FIRST_INO 11 5619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 5719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 5819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * The second extended file system magic number 5919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 6019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SUPER_MAGIC 0xEF53 6119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 6219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __KERNEL__ 6319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SB(sb) (&((sb)->u.ext2_sb)) 6419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 6519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* Assume that user mode programs are passing in an ext2fs superblock, not 6619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * a kernel struct super_block. This will allow us to call the feature-test 6719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * macros from user land. */ 6819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SB(sb) (sb) 6919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 7019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 7119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 7219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Maximal count of links to a file 7319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 7419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_LINK_MAX 65000 7519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 7619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 7719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Macro-instructions used to manage several block sizes 7819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 7919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ 8019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ 8119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) 8219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) 8319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __KERNEL__ 8419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize) 8519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 8619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->addr_per_block_bits) 8719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size) 8819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino) 8919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 9019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size) 9119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 9219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 9319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_GOOD_OLD_INODE_SIZE : (s)->s_inode_size) 9419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 9519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_GOOD_OLD_FIRST_INO : (s)->s_first_ino) 9619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 9719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(__u32)) 9819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 9919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 10019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Macro-instructions used to manage fragments 10119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 10219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MIN_FRAG_SIZE EXT2_MIN_BLOCK_SIZE 10319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_FRAG_SIZE EXT2_MAX_BLOCK_SIZE 10419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MIN_FRAG_LOG_SIZE EXT2_MIN_BLOCK_LOG_SIZE 10519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __KERNEL__ 10619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project# define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size) 10719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block) 10819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 10919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project# define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) 11019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) 11119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 11219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 11319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 11419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * ACL structures 11519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 11619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_acl_header /* Header of Access Control Lists */ 11719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 11819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 aclh_size; 11919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 aclh_file_count; 12019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 aclh_acle_count; 12119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 aclh_first_acle; 12219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 12319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 12419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_acl_entry /* Access Control List Entry */ 12519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 12619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 acle_size; 12719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 acle_perms; /* Access permissions */ 12819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 acle_type; /* Type of entry */ 12919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 acle_tag; /* User or group identity */ 13019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 acle_pad1; 13119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 acle_next; /* Pointer on next entry for the */ 13219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* same inode or on next free entry */ 13319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 13419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 13519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 13619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Structure of a blocks group descriptor 13719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 13819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_group_desc 13919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 14019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_block_bitmap; /* Blocks bitmap block */ 14119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_bitmap; /* Inodes bitmap block */ 14219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_table; /* Inodes table block */ 14319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_blocks_count; /* Free blocks count */ 14419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_inodes_count; /* Free inodes count */ 14519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_used_dirs_count; /* Directories count */ 14619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_flags; 14719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_reserved[2]; 14819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_itable_unused; /* Unused inodes count */ 14919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/ 15019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 15119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 15219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext4_group_desc 15319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 15419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_block_bitmap; /* Blocks bitmap block */ 15519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_bitmap; /* Inodes bitmap block */ 15619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_table; /* Inodes table block */ 15719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_blocks_count; /* Free blocks count */ 15819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_inodes_count; /* Free inodes count */ 15919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_used_dirs_count; /* Directories count */ 16019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_flags; 16119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_reserved[2]; 16219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_itable_unused; /* Unused inodes count */ 16319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/ 16419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 16519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 16619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_table_hi; /* Inodes table block MSB */ 16719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_blocks_count_hi;/* Free blocks count MSB */ 16819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_inodes_count_hi;/* Free inodes count MSB */ 16919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_used_dirs_count_hi; /* Directories count MSB */ 17019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_pad; 17119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_reserved2[3]; 17219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 17319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 17419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not initialized */ 17519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not initialized */ 1763984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 17719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 17819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 17919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Data structures used by the directory indexing feature 18019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 18119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Note: all of the multibyte integer fields are little endian. 18219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 18319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 18419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 18519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Note: dx_root_info is laid out so that if it should somehow get 18619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * overlaid by a dirent the two low bits of the hash version will be 18719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * zero. Therefore, the hash version mod 4 should never be 0. 18819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Sincerely, the paranoia department. 18919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 19019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dx_root_info { 19119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 reserved_zero; 19219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 hash_version; /* 0 now, 1 at release */ 19319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 info_length; /* 8 */ 19419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 indirect_levels; 19519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 unused_flags; 19619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 19719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 19819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_LEGACY 0 19919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_HALF_MD4 1 20019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_TEA 2 20119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_LEGACY_UNSIGNED 3 /* reserved for userspace lib */ 20219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_HALF_MD4_UNSIGNED 4 /* reserved for userspace lib */ 20319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_TEA_UNSIGNED 5 /* reserved for userspace lib */ 20419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 20519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_FLAG_INCOMPAT 0x1 20619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 20719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dx_entry { 20819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 hash; 20919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 block; 21019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 21119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 21219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dx_countlimit { 21319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 limit; 21419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 count; 21519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 21619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 21719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 21819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 21919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Macro-instructions used to manage group descriptors 22019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 2213984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_MIN_DESC_SIZE 32 2223984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_MIN_DESC_SIZE_64BIT 64 2233984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_MAX_DESC_SIZE EXT2_MIN_BLOCK_SIZE 2243984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_DESC_SIZE(s) \ 2253984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt ((EXT2_SB(s)->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT) ? \ 2263984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt (s)->s_desc_size : EXT2_MIN_DESC_SIZE) 2273984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 22819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group) 22919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group) 23019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s)) 23119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* limits imposed by 16-bit value gd_free_{blocks,inode}_count */ 23219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_BLOCKS_PER_GROUP(s) ((1 << 16) - 8) 23319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_INODES_PER_GROUP(s) ((1 << 16) - EXT2_INODES_PER_BLOCK(s)) 23419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __KERNEL__ 23519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block) 23619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits) 23719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 2383984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_DESC_SIZE(s)) 23919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 24019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 24119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 24219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Constants relative to the data blocks 24319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 24419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NDIR_BLOCKS 12 24519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS 24619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) 24719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) 24819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) 24919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 25019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 25119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Inode flags 25219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 25319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SECRM_FL 0x00000001 /* Secure deletion */ 25419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_UNRM_FL 0x00000002 /* Undelete */ 25519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_COMPR_FL 0x00000004 /* Compress file */ 25619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */ 25719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */ 25819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */ 25919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NODUMP_FL 0x00000040 /* do not dump file */ 26019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NOATIME_FL 0x00000080 /* do not update atime */ 26119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* Reserved for compression usage... */ 26219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIRTY_FL 0x00000100 26319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 26419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */ 26519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ECOMPR_FL 0x00000800 /* Compression error */ 26619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* End compression flags --- maybe not all used */ 26719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BTREE_FL 0x00001000 /* btree format dir */ 26819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */ 26919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IMAGIC_FL 0x00002000 27019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 27119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 27219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIRSYNC_FL 0x00010000 /* Synchronous directory modifications */ 27319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 2743984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ 27519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 2763984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ 27719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ 27819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 2793984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */ 2803984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_FL_USER_MODIFIABLE 0x004B80FF /* User modifiable flags */ 28119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 28219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 28319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * ioctl commands 28419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 28519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 28619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* Used for online resize */ 28719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_new_group_input { 28819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 group; /* Group number for this data */ 28919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 block_bitmap; /* Absolute block number of block bitmap */ 29019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 inode_bitmap; /* Absolute block number of inode bitmap */ 29119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 inode_table; /* Absolute block number of inode table start */ 29219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 blocks_count; /* Total number of blocks in this group */ 29319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 reserved_blocks; /* Number of reserved blocks in this group */ 29419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 unused; /* Number of reserved GDT blocks in group */ 29519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 29619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 2973984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidtstruct ext4_new_group_input { 2983984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u32 group; /* Group number for this data */ 2993984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u64 block_bitmap; /* Absolute block number of block bitmap */ 3003984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u64 inode_bitmap; /* Absolute block number of inode bitmap */ 3013984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u64 inode_table; /* Absolute block number of inode table start */ 3023984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u32 blocks_count; /* Total number of blocks in this group */ 3033984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 reserved_blocks; /* Number of reserved blocks in this group */ 3043984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 unused; 3053984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt}; 3063984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 30719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __GNU__ /* Needed for the Hurd */ 30819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define _IOT_ext2_new_group_input _IOT (_IOTS(__u32), 5, _IOTS(__u16), 2, 0, 0) 30919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 31019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 31119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GETFLAGS _IOR('f', 1, long) 31219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_SETFLAGS _IOW('f', 2, long) 31319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GETVERSION _IOR('v', 1, long) 31419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_SETVERSION _IOW('v', 2, long) 31519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GETVERSION_NEW _IOR('f', 3, long) 31619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_SETVERSION_NEW _IOW('f', 4, long) 31719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 31819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GROUP_ADD _IOW('f', 8,struct ext2_new_group_input) 3193984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT4_IOC_GROUP_ADD _IOW('f', 8,struct ext4_new_group_input) 32019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 32119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 32219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Structure of an inode on the disk 32319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 32419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_inode { 32519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_mode; /* File mode */ 32619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_uid; /* Low 16 bits of Owner Uid */ 32719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_size; /* Size in bytes */ 32819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_atime; /* Access time */ 32919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_ctime; /* Inode change time */ 33019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_mtime; /* Modification time */ 33119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_dtime; /* Deletion Time */ 33219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_gid; /* Low 16 bits of Group Id */ 33319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_links_count; /* Links count */ 33419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_blocks; /* Blocks count */ 33519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_flags; /* File flags */ 33619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project union { 33719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 33819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 l_i_version; /* was l_i_reserved1 */ 33919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } linux1; 34019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 34119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 h_i_translator; 34219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } hurd1; 34319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } osd1; /* OS dependent 1 */ 34419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ 34519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_generation; /* File version (for NFS) */ 34619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_file_acl; /* File ACL */ 34719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_dir_acl; /* Directory ACL */ 34819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_faddr; /* Fragment address */ 34919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project union { 35019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 35119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_blocks_hi; 3523984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 l_i_file_acl_high; 35319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_uid_high; /* these 2 fields */ 35419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_gid_high; /* were reserved2[0] */ 35519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 l_i_reserved2; 35619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } linux2; 35719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 35819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 h_i_frag; /* Fragment number */ 35919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 h_i_fsize; /* Fragment size */ 36019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_mode_high; 36119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_uid_high; 36219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_gid_high; 36319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 h_i_author; 36419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } hurd2; 36519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } osd2; /* OS dependent 2 */ 36619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 36719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 36819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 36919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Permanent part of an large inode on the disk 37019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 37119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_inode_large { 37219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_mode; /* File mode */ 37319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_uid; /* Low 16 bits of Owner Uid */ 37419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_size; /* Size in bytes */ 37519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_atime; /* Access time */ 37619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_ctime; /* Inode Change time */ 37719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_mtime; /* Modification time */ 37819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_dtime; /* Deletion Time */ 37919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_gid; /* Low 16 bits of Group Id */ 38019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_links_count; /* Links count */ 38119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_blocks; /* Blocks count */ 38219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_flags; /* File flags */ 38319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project union { 38419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 38519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 l_i_version; /* was l_i_reserved1 */ 38619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } linux1; 38719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 38819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 h_i_translator; 38919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } hurd1; 39019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } osd1; /* OS dependent 1 */ 39119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ 39219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_generation; /* File version (for NFS) */ 39319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_file_acl; /* File ACL */ 39419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_dir_acl; /* Directory ACL */ 39519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_faddr; /* Fragment address */ 39619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project union { 39719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 39819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_blocks_hi; 3993984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 l_i_file_acl_high; 40019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_uid_high; /* these 2 fields */ 40119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_gid_high; /* were reserved2[0] */ 40219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 l_i_reserved2; 40319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } linux2; 40419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 40519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 h_i_frag; /* Fragment number */ 40619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 h_i_fsize; /* Fragment size */ 40719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_mode_high; 40819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_uid_high; 40919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_gid_high; 41019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 h_i_author; 41119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } hurd2; 41219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } osd2; /* OS dependent 2 */ 41319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_extra_isize; 41419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_pad1; 41519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ 41619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_mtime_extra; /* extra Modification time (nsec << 2 | epoch) */ 41719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 41819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_crtime; /* File creation time */ 41919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_crtime_extra; /* extra File creation time (nsec << 2 | epoch)*/ 4203984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u32 i_version_hi; /* high 32 bits for 64-bit version */ 42119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 42219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 42319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_size_high i_dir_acl 42419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 42519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if defined(__KERNEL__) || defined(__linux__) 42619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_reserved1 osd1.linux1.l_i_reserved1 42719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_frag osd2.linux2.l_i_frag 42819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_fsize osd2.linux2.l_i_fsize 42919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_uid_low i_uid 43019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_gid_low i_gid 43119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_uid_high osd2.linux2.l_i_uid_high 43219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_gid_high osd2.linux2.l_i_gid_high 43319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_reserved2 osd2.linux2.l_i_reserved2 43419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 43519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if defined(__GNU__) 43619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 43719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_translator osd1.hurd1.h_i_translator 43819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_frag osd2.hurd2.h_i_frag; 43919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_fsize osd2.hurd2.h_i_fsize; 44019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_uid_high osd2.hurd2.h_i_uid_high 44119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_gid_high osd2.hurd2.h_i_gid_high 44219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_author osd2.hurd2.h_i_author 44319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 44419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* __GNU__ */ 44519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* defined(__KERNEL__) || defined(__linux__) */ 44619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 44719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define inode_uid(inode) ((inode).i_uid | (inode).osd2.linux2.l_i_uid_high << 16) 44819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define inode_gid(inode) ((inode).i_gid | (inode).osd2.linux2.l_i_gid_high << 16) 44919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define ext2fs_set_i_uid_high(inode,x) ((inode).osd2.linux2.l_i_uid_high = (x)) 45019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define ext2fs_set_i_gid_high(inode,x) ((inode).osd2.linux2.l_i_gid_high = (x)) 45119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 45219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 45319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * File system states 45419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 45519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ 45619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERROR_FS 0x0002 /* Errors detected */ 4573984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */ 45819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 45919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 46019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Misc. filesystem flags 46119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 46219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ 46319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ 46419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FLAGS_TEST_FILESYS 0x0004 /* OK for use on development code */ 46519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 46619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 46719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Mount flags 46819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 46919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */ 47019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */ 47119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */ 47219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */ 47319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */ 47419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */ 47519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */ 47619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */ 47719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 47819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt 47919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define set_opt(o, opt) o |= EXT2_MOUNT_##opt 48019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \ 48119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_MOUNT_##opt) 48219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 48319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Maximal mount counts between two filesystem checks 48419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 48519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 48619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 48719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 48819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 48919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Behaviour when detecting errors 49019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 49119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ 49219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERRORS_RO 2 /* Remount fs read-only */ 49319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERRORS_PANIC 3 /* Panic */ 49419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE 49519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 49619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 49719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Structure of the super block 49819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 49919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_super_block { 50019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_inodes_count; /* Inodes count */ 50119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_blocks_count; /* Blocks count */ 50219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_r_blocks_count; /* Reserved blocks count */ 50319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_free_blocks_count; /* Free blocks count */ 50419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_free_inodes_count; /* Free inodes count */ 50519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_first_data_block; /* First Data Block */ 50619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_log_block_size; /* Block size */ 50719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __s32 s_log_frag_size; /* Fragment size */ 50819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_blocks_per_group; /* # Blocks per group */ 50919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_frags_per_group; /* # Fragments per group */ 51019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_inodes_per_group; /* # Inodes per group */ 51119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_mtime; /* Mount time */ 51219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_wtime; /* Write time */ 51319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_mnt_count; /* Mount count */ 51419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __s16 s_max_mnt_count; /* Maximal mount count */ 51519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_magic; /* Magic signature */ 51619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_state; /* File system state */ 51719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_errors; /* Behaviour when detecting errors */ 51819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_minor_rev_level; /* minor revision level */ 51919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_lastcheck; /* time of last check */ 52019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_checkinterval; /* max. time between checks */ 52119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_creator_os; /* OS */ 52219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_rev_level; /* Revision level */ 52319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_def_resuid; /* Default uid for reserved blocks */ 52419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_def_resgid; /* Default gid for reserved blocks */ 52519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 52619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * These fields are for EXT2_DYNAMIC_REV superblocks only. 52719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 52819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Note: the difference between the compatible feature set and 52919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * the incompatible feature set is that if there is a bit set 53019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * in the incompatible feature set that the kernel doesn't 53119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * know about, it should refuse to mount the filesystem. 53219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 53319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * e2fsck's requirements are more strict; if it doesn't know 53419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * about a feature in either the compatible or incompatible 53519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * feature set, it must abort and not try to meddle with 53619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * things it doesn't understand... 53719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 53819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_first_ino; /* First non-reserved inode */ 53919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_inode_size; /* size of inode structure */ 54019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_block_group_nr; /* block group # of this superblock */ 54119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_feature_compat; /* compatible feature set */ 54219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_feature_incompat; /* incompatible feature set */ 54319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_feature_ro_compat; /* readonly-compatible feature set */ 54419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_uuid[16]; /* 128-bit uuid for volume */ 54519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char s_volume_name[16]; /* volume name */ 54619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char s_last_mounted[64]; /* directory where last mounted */ 54719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_algorithm_usage_bitmap; /* For compression */ 54819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 54919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Performance hints. Directory preallocation should only 55019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on. 55119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 55219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 55319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 55419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_reserved_gdt_blocks; /* Per group table for online growth */ 55519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 55619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set. 55719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 55819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 55919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_journal_inum; /* inode number of journal file */ 56019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_journal_dev; /* device number of journal file */ 56119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_last_orphan; /* start of list of inodes to delete */ 56219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_hash_seed[4]; /* HTREE hash seed */ 56319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_def_hash_version; /* Default hash version to use */ 56419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_jnl_backup_type; /* Default type of journal backup */ 56519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_desc_size; /* Group desc. size: INCOMPAT_64BIT */ 56619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_default_mount_opts; 56719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_first_meta_bg; /* First metablock group */ 56819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_mkfs_time; /* When the filesystem was created */ 56919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_jnl_blocks[17]; /* Backup of the journal inode */ 57019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_blocks_count_hi; /* Blocks count high 32bits */ 57119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_r_blocks_count_hi; /* Reserved blocks count high 32 bits*/ 57219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_free_blocks_hi; /* Free blocks count */ 57319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_min_extra_isize; /* All inodes have at least # bytes */ 57419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_want_extra_isize; /* New inodes should reserve # bytes */ 57519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_flags; /* Miscellaneous flags */ 57619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_raid_stride; /* RAID stride */ 57719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_mmp_interval; /* # seconds to wait in MMP checking */ 57819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u64 s_mmp_block; /* Block for multi-mount protection */ 57919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ 5803984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 5813984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u8 s_reserved_char_pad; 5823984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 s_reserved_pad; /* Padding to next 32bits */ 5833984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u64 s_kbytes_written; /* nr of lifetime kilobytes written */ 5843984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u32 s_reserved[160]; /* Padding to the end of the block */ 58519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 58619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 58719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 58819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Codes for operating systems 58919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 59019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_OS_LINUX 0 59119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_OS_HURD 1 5923984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_OBSO_OS_MASIX 2 59319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_OS_FREEBSD 3 59419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_OS_LITES 4 59519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 59619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 59719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Revision levels 59819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 59919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ 60019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 60119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 60219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV 60319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV 60419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 60519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_GOOD_OLD_INODE_SIZE 128 60619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 60719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 60819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Journal inode backup types 60919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 61019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_JNL_BACKUP_BLOCKS 1 61119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 61219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 61319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Feature set definitions 61419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 61519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 61619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ 61719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ( EXT2_SB(sb)->s_feature_compat & (mask) ) 61819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ 61919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ( EXT2_SB(sb)->s_feature_ro_compat & (mask) ) 62019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ 62119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ( EXT2_SB(sb)->s_feature_incompat & (mask) ) 62219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 62319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001 62419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002 62519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 62619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008 62719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_RESIZE_INODE 0x0010 62819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020 62919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_LAZY_BG 0x0040 63019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 63119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 63219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 63319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 not used */ 63419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 63519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 63619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 63719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 63819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 63919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 64019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 64119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 64219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 64319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010 64419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040 64519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 64619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_INCOMPAT_MMP 0x0100 6473984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 64819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 64919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 65019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_SUPP 0 65119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE) 65219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 65319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ 6543984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt EXT4_FEATURE_RO_COMPAT_DIR_NLINK| \ 65519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_FEATURE_RO_COMPAT_BTREE_DIR) 65619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 65719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 65819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Default values for user and/or group using reserved blocks 65919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 66019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEF_RESUID 0 66119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEF_RESGID 0 66219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 66319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 66419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Default mount options 66519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 66619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_DEBUG 0x0001 66719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_BSDGROUPS 0x0002 66819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_XATTR_USER 0x0004 66919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_ACL 0x0008 67019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_UID16 0x0010 6713984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT3_DEFM_JMODE 0x0060 67219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_DEFM_JMODE_DATA 0x0020 67319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_DEFM_JMODE_ORDERED 0x0040 67419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_DEFM_JMODE_WBACK 0x0060 67519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 67619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 67719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Structure of a directory entry 67819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 67919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NAME_LEN 255 68019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 68119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dir_entry { 68219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 inode; /* Inode number */ 68319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 rec_len; /* Directory entry length */ 68419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 name_len; /* Name length */ 68519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char name[EXT2_NAME_LEN]; /* File name */ 68619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 68719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 68819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 68919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * The new version of the directory entry. Since EXT2 structures are 69019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * stored in intel byte order, and the name_len field could never be 69119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * bigger than 255 chars, it's safe to reclaim the extra byte for the 69219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * file_type field. 69319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 69419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dir_entry_2 { 69519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 inode; /* Inode number */ 69619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 rec_len; /* Directory entry length */ 69719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 name_len; /* Name length */ 69819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 file_type; 69919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char name[EXT2_NAME_LEN]; /* File name */ 70019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 70119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 70219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 70319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Ext2 directory file types. Only the low 3 bits are used. The 70419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * other bits are reserved for now. 70519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 70619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_UNKNOWN 0 70719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_REG_FILE 1 70819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_DIR 2 70919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_CHRDEV 3 71019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_BLKDEV 4 71119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_FIFO 5 71219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_SOCK 6 71319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_SYMLINK 7 71419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 71519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_MAX 8 71619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 71719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 71819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * EXT2_DIR_PAD defines the directory entries boundaries 71919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 72019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * NOTE: It must be a multiple of 4 72119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 72219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIR_PAD 4 72319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) 72419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ 72519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ~EXT2_DIR_ROUND) 72619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 72719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 72819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * This structure will be used for multiple mount protection. It will be 72919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * written into the block number saved in the s_mmp_block field in the 73019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * superblock. 73119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 73219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MMP_MAGIC 0x004D4D50 /* ASCII for MMP */ 73319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MMP_CLEAN 0xFF4D4D50 /* Value of mmp_seq for clean unmount */ 73419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MMP_FSCK_ON 0xE24D4D50 /* Value of mmp_seq when being fscked */ 73519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 73619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct mmp_struct { 73719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 mmp_magic; 73819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 mmp_seq; 73919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u64 mmp_time; 74019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char mmp_nodename[64]; 74119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char mmp_bdevname[32]; 74219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 mmp_interval; 74319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 mmp_pad1; 74419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 mmp_pad2; 74519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 74619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 74719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 74819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Interval in number of seconds to update the MMP sequence number. 74919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 75019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MMP_DEF_INTERVAL 5 75119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 75219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* _LINUX_EXT2_FS_H */ 753