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 */ 538558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT2_EXCLUDE_INO 9 /* The "exclude" inode, for snapshots */ 5419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 5519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* First non-reserved inode for old ext2 filesystems */ 5619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_GOOD_OLD_FIRST_INO 11 5719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 5819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 5919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * The second extended file system magic number 6019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 6119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SUPER_MAGIC 0xEF53 6219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 6319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __KERNEL__ 6419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SB(sb) (&((sb)->u.ext2_sb)) 6519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 6619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* Assume that user mode programs are passing in an ext2fs superblock, not 6719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * a kernel struct super_block. This will allow us to call the feature-test 6819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * macros from user land. */ 6919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SB(sb) (sb) 7019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 7119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 7219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 7319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Maximal count of links to a file 7419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 7519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_LINK_MAX 65000 7619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 7719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 7819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Macro-instructions used to manage several block sizes 7919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 8019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ 8119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ 8219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) 8319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) 8419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __KERNEL__ 8519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize) 8619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 8719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->addr_per_block_bits) 8819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size) 8919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino) 9019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 9119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size) 9219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 9319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 9419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_GOOD_OLD_INODE_SIZE : (s)->s_inode_size) 9519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ 9619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_GOOD_OLD_FIRST_INO : (s)->s_first_ino) 9719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 9819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(__u32)) 9919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 10019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 10119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Macro-instructions used to manage fragments 10219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 10319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MIN_FRAG_SIZE EXT2_MIN_BLOCK_SIZE 10419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_FRAG_SIZE EXT2_MAX_BLOCK_SIZE 10519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MIN_FRAG_LOG_SIZE EXT2_MIN_BLOCK_LOG_SIZE 10619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __KERNEL__ 10719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project# define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size) 10819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block) 10919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 11019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project# define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) 11119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) 11219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 11319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 11419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 11519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * ACL structures 11619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 11719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_acl_header /* Header of Access Control Lists */ 11819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 11919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 aclh_size; 12019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 aclh_file_count; 12119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 aclh_acle_count; 12219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 aclh_first_acle; 12319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 12419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 12519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_acl_entry /* Access Control List Entry */ 12619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 12719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 acle_size; 12819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 acle_perms; /* Access permissions */ 12919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 acle_type; /* Type of entry */ 13019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 acle_tag; /* User or group identity */ 13119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 acle_pad1; 13219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 acle_next; /* Pointer on next entry for the */ 13319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* same inode or on next free entry */ 13419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 13519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 13619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 13719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Structure of a blocks group descriptor 13819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 13919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_group_desc 14019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 14119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_block_bitmap; /* Blocks bitmap block */ 14219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_bitmap; /* Inodes bitmap block */ 14319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_table; /* Inodes table block */ 14419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_blocks_count; /* Free blocks count */ 14519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_inodes_count; /* Free inodes count */ 14619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_used_dirs_count; /* Directories count */ 14719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_flags; 14819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_reserved[2]; 14919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_itable_unused; /* Unused inodes count */ 15019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/ 15119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 15219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 15319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext4_group_desc 15419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project{ 15519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_block_bitmap; /* Blocks bitmap block */ 15619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_bitmap; /* Inodes bitmap block */ 15719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_table; /* Inodes table block */ 15819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_blocks_count; /* Free blocks count */ 15919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_inodes_count; /* Free inodes count */ 16019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_used_dirs_count; /* Directories count */ 16119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_flags; 16219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_reserved[2]; 16319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_itable_unused; /* Unused inodes count */ 16419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/ 16519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 16619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 16719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_inode_table_hi; /* Inodes table block MSB */ 16819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_blocks_count_hi;/* Free blocks count MSB */ 16919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_free_inodes_count_hi;/* Free inodes count MSB */ 17019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_used_dirs_count_hi; /* Directories count MSB */ 17119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 bg_pad; 17219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 bg_reserved2[3]; 17319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 17419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 17519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not initialized */ 17619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not initialized */ 1773984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 17819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 17919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 18019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Data structures used by the directory indexing feature 18119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 18219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Note: all of the multibyte integer fields are little endian. 18319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 18419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 18519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 18619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Note: dx_root_info is laid out so that if it should somehow get 18719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * overlaid by a dirent the two low bits of the hash version will be 18819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * zero. Therefore, the hash version mod 4 should never be 0. 18919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Sincerely, the paranoia department. 19019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 19119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dx_root_info { 19219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 reserved_zero; 19319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 hash_version; /* 0 now, 1 at release */ 19419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 info_length; /* 8 */ 19519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 indirect_levels; 19619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 unused_flags; 19719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 19819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 19919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_LEGACY 0 20019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_HALF_MD4 1 20119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_TEA 2 20219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_LEGACY_UNSIGNED 3 /* reserved for userspace lib */ 20319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_HALF_MD4_UNSIGNED 4 /* reserved for userspace lib */ 20419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_TEA_UNSIGNED 5 /* reserved for userspace lib */ 20519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 20619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HASH_FLAG_INCOMPAT 0x1 20719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 20819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dx_entry { 20919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 hash; 21019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 block; 21119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 21219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 21319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dx_countlimit { 21419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 limit; 21519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 count; 21619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 21719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 21819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 21919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 22019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Macro-instructions used to manage group descriptors 22119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 2223984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_MIN_DESC_SIZE 32 2233984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_MIN_DESC_SIZE_64BIT 64 2243984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_MAX_DESC_SIZE EXT2_MIN_BLOCK_SIZE 2253984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_DESC_SIZE(s) \ 2263984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt ((EXT2_SB(s)->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT) ? \ 2273984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt (s)->s_desc_size : EXT2_MIN_DESC_SIZE) 2283984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 22919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group) 23019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group) 23119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s)) 23219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* limits imposed by 16-bit value gd_free_{blocks,inode}_count */ 23319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_BLOCKS_PER_GROUP(s) ((1 << 16) - 8) 23419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_INODES_PER_GROUP(s) ((1 << 16) - EXT2_INODES_PER_BLOCK(s)) 23519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __KERNEL__ 23619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block) 23719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits) 23819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 2393984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_DESC_SIZE(s)) 24019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 24119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 24219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 24319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Constants relative to the data blocks 24419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 24519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NDIR_BLOCKS 12 24619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS 24719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) 24819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) 24919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) 25019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 25119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 25219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Inode flags 25319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 25419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SECRM_FL 0x00000001 /* Secure deletion */ 25519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_UNRM_FL 0x00000002 /* Undelete */ 25619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_COMPR_FL 0x00000004 /* Compress file */ 25719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */ 25819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */ 25919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */ 26019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NODUMP_FL 0x00000040 /* do not dump file */ 26119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NOATIME_FL 0x00000080 /* do not update atime */ 26219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* Reserved for compression usage... */ 26319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIRTY_FL 0x00000100 26419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 26519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */ 26619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ECOMPR_FL 0x00000800 /* Compression error */ 26719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* End compression flags --- maybe not all used */ 26819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_BTREE_FL 0x00001000 /* btree format dir */ 26919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */ 27019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IMAGIC_FL 0x00002000 27119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 27219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 27319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIRSYNC_FL 0x00010000 /* Synchronous directory modifications */ 27419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 2753984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ 27619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 2778558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 2783984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ 2798558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_SNAPFILE_FL 0x01000000 /* Inode is a snapshot */ 2808558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_SNAPFILE_DELETED_FL 0x04000000 /* Snapshot is being deleted */ 2818558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_SNAPFILE_SHRUNK_FL 0x08000000 /* Snapshot shrink has completed */ 28219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ 28319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 2843984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */ 2853984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_FL_USER_MODIFIABLE 0x004B80FF /* User modifiable flags */ 28619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 28719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 28819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * ioctl commands 28919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 29019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 29119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* Used for online resize */ 29219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_new_group_input { 29319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 group; /* Group number for this data */ 29419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 block_bitmap; /* Absolute block number of block bitmap */ 29519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 inode_bitmap; /* Absolute block number of inode bitmap */ 29619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 inode_table; /* Absolute block number of inode table start */ 29719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 blocks_count; /* Total number of blocks in this group */ 29819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 reserved_blocks; /* Number of reserved blocks in this group */ 29919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 unused; /* Number of reserved GDT blocks in group */ 30019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 30119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 3023984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidtstruct ext4_new_group_input { 3033984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u32 group; /* Group number for this data */ 3043984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u64 block_bitmap; /* Absolute block number of block bitmap */ 3053984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u64 inode_bitmap; /* Absolute block number of inode bitmap */ 3063984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u64 inode_table; /* Absolute block number of inode table start */ 3073984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u32 blocks_count; /* Total number of blocks in this group */ 3083984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 reserved_blocks; /* Number of reserved blocks in this group */ 3093984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 unused; 3103984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt}; 3113984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt 31219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#ifdef __GNU__ /* Needed for the Hurd */ 31319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define _IOT_ext2_new_group_input _IOT (_IOTS(__u32), 5, _IOTS(__u16), 2, 0, 0) 31419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif 31519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 31619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GETFLAGS _IOR('f', 1, long) 31719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_SETFLAGS _IOW('f', 2, long) 31819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GETVERSION _IOR('v', 1, long) 31919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_SETVERSION _IOW('v', 2, long) 32019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GETVERSION_NEW _IOR('f', 3, long) 32119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_SETVERSION_NEW _IOW('f', 4, long) 32219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 32319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_IOC_GROUP_ADD _IOW('f', 8,struct ext2_new_group_input) 3243984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT4_IOC_GROUP_ADD _IOW('f', 8,struct ext4_new_group_input) 32519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 32619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 32719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Structure of an inode on the disk 32819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 32919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_inode { 33019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_mode; /* File mode */ 33119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_uid; /* Low 16 bits of Owner Uid */ 33219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_size; /* Size in bytes */ 33319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_atime; /* Access time */ 33419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_ctime; /* Inode change time */ 33519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_mtime; /* Modification time */ 33619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_dtime; /* Deletion Time */ 33719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_gid; /* Low 16 bits of Group Id */ 33819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_links_count; /* Links count */ 33919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_blocks; /* Blocks count */ 34019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_flags; /* File flags */ 34119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project union { 34219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 34319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 l_i_version; /* was l_i_reserved1 */ 34419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } linux1; 34519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 34619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 h_i_translator; 34719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } hurd1; 34819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } osd1; /* OS dependent 1 */ 34919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ 35019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_generation; /* File version (for NFS) */ 35119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_file_acl; /* File ACL */ 35219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_dir_acl; /* Directory ACL */ 35319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_faddr; /* Fragment address */ 35419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project union { 35519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 35619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_blocks_hi; 3573984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 l_i_file_acl_high; 35819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_uid_high; /* these 2 fields */ 35919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_gid_high; /* were reserved2[0] */ 36019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 l_i_reserved2; 36119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } linux2; 36219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 36319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 h_i_frag; /* Fragment number */ 36419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 h_i_fsize; /* Fragment size */ 36519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_mode_high; 36619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_uid_high; 36719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_gid_high; 36819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 h_i_author; 36919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } hurd2; 37019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } osd2; /* OS dependent 2 */ 37119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 37219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 37319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 37419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Permanent part of an large inode on the disk 37519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 37619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_inode_large { 37719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_mode; /* File mode */ 37819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_uid; /* Low 16 bits of Owner Uid */ 37919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_size; /* Size in bytes */ 38019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_atime; /* Access time */ 38119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_ctime; /* Inode Change time */ 38219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_mtime; /* Modification time */ 38319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_dtime; /* Deletion Time */ 38419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_gid; /* Low 16 bits of Group Id */ 38519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_links_count; /* Links count */ 38619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_blocks; /* Blocks count */ 38719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_flags; /* File flags */ 38819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project union { 38919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 39019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 l_i_version; /* was l_i_reserved1 */ 39119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } linux1; 39219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 39319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 h_i_translator; 39419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } hurd1; 39519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } osd1; /* OS dependent 1 */ 39619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ 39719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_generation; /* File version (for NFS) */ 39819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_file_acl; /* File ACL */ 39919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_dir_acl; /* Directory ACL */ 40019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_faddr; /* Fragment address */ 40119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project union { 40219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 40319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_blocks_hi; 4043984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 l_i_file_acl_high; 40519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_uid_high; /* these 2 fields */ 40619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 l_i_gid_high; /* were reserved2[0] */ 40719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 l_i_reserved2; 40819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } linux2; 40919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project struct { 41019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 h_i_frag; /* Fragment number */ 41119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 h_i_fsize; /* Fragment size */ 41219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_mode_high; 41319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_uid_high; 41419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 h_i_gid_high; 41519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 h_i_author; 41619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } hurd2; 41719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project } osd2; /* OS dependent 2 */ 41819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_extra_isize; 41919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 i_pad1; 42019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ 42119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_mtime_extra; /* extra Modification time (nsec << 2 | epoch) */ 42219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 42319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_crtime; /* File creation time */ 42419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 i_crtime_extra; /* extra File creation time (nsec << 2 | epoch)*/ 4253984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u32 i_version_hi; /* high 32 bits for 64-bit version */ 42619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 42719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 42819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_size_high i_dir_acl 42919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 43019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if defined(__KERNEL__) || defined(__linux__) 43119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_reserved1 osd1.linux1.l_i_reserved1 43219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_frag osd2.linux2.l_i_frag 43319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_fsize osd2.linux2.l_i_fsize 43419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_uid_low i_uid 43519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_gid_low i_gid 43619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_uid_high osd2.linux2.l_i_uid_high 43719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_gid_high osd2.linux2.l_i_gid_high 43819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_reserved2 osd2.linux2.l_i_reserved2 43919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#else 44019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#if defined(__GNU__) 44119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 44219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_translator osd1.hurd1.h_i_translator 44319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_frag osd2.hurd2.h_i_frag; 44419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_fsize osd2.hurd2.h_i_fsize; 44519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_uid_high osd2.hurd2.h_i_uid_high 44619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_gid_high osd2.hurd2.h_i_gid_high 44719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define i_author osd2.hurd2.h_i_author 44819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 44919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* __GNU__ */ 45019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* defined(__KERNEL__) || defined(__linux__) */ 45119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 45219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define inode_uid(inode) ((inode).i_uid | (inode).osd2.linux2.l_i_uid_high << 16) 45319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define inode_gid(inode) ((inode).i_gid | (inode).osd2.linux2.l_i_gid_high << 16) 45419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define ext2fs_set_i_uid_high(inode,x) ((inode).osd2.linux2.l_i_uid_high = (x)) 45519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define ext2fs_set_i_gid_high(inode,x) ((inode).osd2.linux2.l_i_gid_high = (x)) 45619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 45719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 45819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * File system states 45919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 46019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ 46119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERROR_FS 0x0002 /* Errors detected */ 4623984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */ 46319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 46419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 46519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Misc. filesystem flags 46619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 46719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ 46819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ 46919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FLAGS_TEST_FILESYS 0x0004 /* OK for use on development code */ 4708558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT2_FLAGS_IS_SNAPSHOT 0x0010 /* This is a snapshot image */ 4718558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT2_FLAGS_FIX_SNAPSHOT 0x0020 /* Snapshot inodes corrupted */ 4728558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT2_FLAGS_FIX_EXCLUDE 0x0040 /* Exclude bitmaps corrupted */ 47319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 47419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 47519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Mount flags 47619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 47719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */ 47819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */ 47919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */ 48019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */ 48119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */ 48219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */ 48319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */ 48419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */ 48519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 48619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt 48719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define set_opt(o, opt) o |= EXT2_MOUNT_##opt 48819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \ 48919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_MOUNT_##opt) 49019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 49119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Maximal mount counts between two filesystem checks 49219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 49319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 49419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 49519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 49619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 49719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Behaviour when detecting errors 49819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 49919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ 50019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERRORS_RO 2 /* Remount fs read-only */ 50119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERRORS_PANIC 3 /* Panic */ 50219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE 50319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 5048558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#if (__GNUC__ >= 4) 5058558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define ext4_offsetof(TYPE,MEMBER) __builtin_offsetof(TYPE,MEMBER) 5068558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#else 5078558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define ext4_offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 5088558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#endif 5098558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall 51019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 51119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Structure of the super block 51219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 51319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_super_block { 51419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_inodes_count; /* Inodes count */ 51519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_blocks_count; /* Blocks count */ 51619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_r_blocks_count; /* Reserved blocks count */ 51719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_free_blocks_count; /* Free blocks count */ 51819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_free_inodes_count; /* Free inodes count */ 51919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_first_data_block; /* First Data Block */ 52019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_log_block_size; /* Block size */ 52119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __s32 s_log_frag_size; /* Fragment size */ 52219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_blocks_per_group; /* # Blocks per group */ 52319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_frags_per_group; /* # Fragments per group */ 52419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_inodes_per_group; /* # Inodes per group */ 52519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_mtime; /* Mount time */ 52619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_wtime; /* Write time */ 52719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_mnt_count; /* Mount count */ 52819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __s16 s_max_mnt_count; /* Maximal mount count */ 52919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_magic; /* Magic signature */ 53019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_state; /* File system state */ 53119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_errors; /* Behaviour when detecting errors */ 53219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_minor_rev_level; /* minor revision level */ 53319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_lastcheck; /* time of last check */ 53419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_checkinterval; /* max. time between checks */ 53519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_creator_os; /* OS */ 53619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_rev_level; /* Revision level */ 53719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_def_resuid; /* Default uid for reserved blocks */ 53819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_def_resgid; /* Default gid for reserved blocks */ 53919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 54019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * These fields are for EXT2_DYNAMIC_REV superblocks only. 54119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 54219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Note: the difference between the compatible feature set and 54319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * the incompatible feature set is that if there is a bit set 54419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * in the incompatible feature set that the kernel doesn't 54519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * know about, it should refuse to mount the filesystem. 54619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 54719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * e2fsck's requirements are more strict; if it doesn't know 54819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * about a feature in either the compatible or incompatible 54919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * feature set, it must abort and not try to meddle with 55019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * things it doesn't understand... 55119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 55219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_first_ino; /* First non-reserved inode */ 55319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_inode_size; /* size of inode structure */ 55419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_block_group_nr; /* block group # of this superblock */ 55519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_feature_compat; /* compatible feature set */ 55619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_feature_incompat; /* incompatible feature set */ 55719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_feature_ro_compat; /* readonly-compatible feature set */ 55819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_uuid[16]; /* 128-bit uuid for volume */ 55919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char s_volume_name[16]; /* volume name */ 56019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char s_last_mounted[64]; /* directory where last mounted */ 56119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_algorithm_usage_bitmap; /* For compression */ 56219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 56319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Performance hints. Directory preallocation should only 56419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on. 56519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 56619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 56719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 56819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_reserved_gdt_blocks; /* Per group table for online growth */ 56919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project /* 57019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set. 57119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 57219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 57319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_journal_inum; /* inode number of journal file */ 57419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_journal_dev; /* device number of journal file */ 57519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_last_orphan; /* start of list of inodes to delete */ 57619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_hash_seed[4]; /* HTREE hash seed */ 57719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_def_hash_version; /* Default hash version to use */ 57819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 s_jnl_backup_type; /* Default type of journal backup */ 57919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_desc_size; /* Group desc. size: INCOMPAT_64BIT */ 58019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_default_mount_opts; 58119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_first_meta_bg; /* First metablock group */ 58219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_mkfs_time; /* When the filesystem was created */ 58319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_jnl_blocks[17]; /* Backup of the journal inode */ 58419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_blocks_count_hi; /* Blocks count high 32bits */ 58519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_r_blocks_count_hi; /* Reserved blocks count high 32 bits*/ 58619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_free_blocks_hi; /* Free blocks count */ 58719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_min_extra_isize; /* All inodes have at least # bytes */ 58819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_want_extra_isize; /* New inodes should reserve # bytes */ 58919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_flags; /* Miscellaneous flags */ 59019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_raid_stride; /* RAID stride */ 59119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 s_mmp_interval; /* # seconds to wait in MMP checking */ 59219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u64 s_mmp_block; /* Block for multi-mount protection */ 59319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ 5943984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 5953984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u8 s_reserved_char_pad; 5963984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u16 s_reserved_pad; /* Padding to next 32bits */ 5973984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt __u64 s_kbytes_written; /* nr of lifetime kilobytes written */ 5988558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_snapshot_inum; /* Inode number of active snapshot */ 5998558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_snapshot_id; /* sequential ID of active snapshot */ 6008558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u64 s_snapshot_r_blocks_count; /* reserved blocks for active 6018558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall snapshot's future use */ 6028558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_snapshot_list; /* inode number of the head of the on-disk snapshot list */ 6038558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_S_ERR_START ext4_offsetof(struct ext2_super_block, s_error_count) 6048558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_error_count; /* number of fs errors */ 6058558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_first_error_time; /* first time an error happened */ 6068558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_first_error_ino; /* inode involved in first error */ 6078558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u64 s_first_error_block; /* block involved of first error */ 6088558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u8 s_first_error_func[32]; /* function where the error happened */ 6098558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_first_error_line; /* line number where error happened */ 6108558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_last_error_time; /* most recent time of an error */ 6118558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_last_error_ino; /* inode involved in last error */ 6128558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_last_error_line; /* line number where error happened */ 6138558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u64 s_last_error_block; /* block involved of last error */ 6148558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u8 s_last_error_func[32]; /* function where the error happened */ 6158558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_S_ERR_END ext4_offsetof(struct ext2_super_block, s_mount_opts) 6168558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u8 s_mount_opts[64]; 6178558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall __u32 s_reserved[112]; /* Padding to the end of the block */ 61819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 61919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 6208558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) 6218558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall 62219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 62319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Codes for operating systems 62419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 62519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_OS_LINUX 0 62619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_OS_HURD 1 6273984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT2_OBSO_OS_MASIX 2 62819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_OS_FREEBSD 3 62919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_OS_LITES 4 63019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 63119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 63219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Revision levels 63319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 63419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ 63519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 63619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 63719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV 63819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV 63919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 64019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_GOOD_OLD_INODE_SIZE 128 64119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 64219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 64319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Journal inode backup types 64419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 64519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_JNL_BACKUP_BLOCKS 1 64619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 64719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 64819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Feature set definitions 64919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 65019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 65119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ 65219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ( EXT2_SB(sb)->s_feature_compat & (mask) ) 65319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ 65419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ( EXT2_SB(sb)->s_feature_ro_compat & (mask) ) 65519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ 65619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ( EXT2_SB(sb)->s_feature_incompat & (mask) ) 65719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 65819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001 65919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002 66019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 66119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008 66219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_RESIZE_INODE 0x0010 66319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020 66419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_LAZY_BG 0x0040 6658558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT2_FEATURE_COMPAT_EXCLUDE_INODE 0x0080 66619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 66719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 66819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 66919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 not used */ 67019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 67119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 67219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 67319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 6748558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_FEATURE_RO_COMPAT_HAS_SNAPSHOT 0x0080 67519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 67619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 67719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 67819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 67919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 68019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010 68119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040 68219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 68319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT4_FEATURE_INCOMPAT_MMP 0x0100 6843984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 6858558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 6868558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 68719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 68819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 68919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_COMPAT_SUPP 0 69019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE) 69119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 69219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ 6933984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt EXT4_FEATURE_RO_COMPAT_DIR_NLINK| \ 69419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project EXT2_FEATURE_RO_COMPAT_BTREE_DIR) 69519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 69619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 69719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Default values for user and/or group using reserved blocks 69819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 69919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEF_RESUID 0 70019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEF_RESGID 0 70119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 70219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 70319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Default mount options 70419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 70519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_DEBUG 0x0001 70619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_BSDGROUPS 0x0002 70719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_XATTR_USER 0x0004 70819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_ACL 0x0008 70919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DEFM_UID16 0x0010 7103984b61df41c68966bdfbb2a5e5a45ef4b9a536cDmitry Shmidt#define EXT3_DEFM_JMODE 0x0060 71119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_DEFM_JMODE_DATA 0x0020 71219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_DEFM_JMODE_ORDERED 0x0040 71319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT3_DEFM_JMODE_WBACK 0x0060 7148558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_DEFM_NOBARRIER 0x0100 7158558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_DEFM_BLOCK_VALIDITY 0x0200 7168558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_DEFM_DISCARD 0x0400 7178558eab78390d1924cd6b255686ceef133f294d5Ken Sumrall#define EXT4_DEFM_NODELALLOC 0x0800 71819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 71919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 72019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Structure of a directory entry 72119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 72219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_NAME_LEN 255 72319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 72419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dir_entry { 72519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 inode; /* Inode number */ 72619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 rec_len; /* Directory entry length */ 72719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 name_len; /* Name length */ 72819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char name[EXT2_NAME_LEN]; /* File name */ 72919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 73019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 73119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 73219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * The new version of the directory entry. Since EXT2 structures are 73319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * stored in intel byte order, and the name_len field could never be 73419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * bigger than 255 chars, it's safe to reclaim the extra byte for the 73519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * file_type field. 73619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 73719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct ext2_dir_entry_2 { 73819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 inode; /* Inode number */ 73919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 rec_len; /* Directory entry length */ 74019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 name_len; /* Name length */ 74119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u8 file_type; 74219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char name[EXT2_NAME_LEN]; /* File name */ 74319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 74419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 74519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 74619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Ext2 directory file types. Only the low 3 bits are used. The 74719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * other bits are reserved for now. 74819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 74919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_UNKNOWN 0 75019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_REG_FILE 1 75119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_DIR 2 75219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_CHRDEV 3 75319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_BLKDEV 4 75419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_FIFO 5 75519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_SOCK 6 75619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_SYMLINK 7 75719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 75819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_FT_MAX 8 75919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 76019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 76119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * EXT2_DIR_PAD defines the directory entries boundaries 76219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * 76319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * NOTE: It must be a multiple of 4 76419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 76519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIR_PAD 4 76619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) 76719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ 76819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project ~EXT2_DIR_ROUND) 76919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 77019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 77119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * This structure will be used for multiple mount protection. It will be 77219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * written into the block number saved in the s_mmp_block field in the 77319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * superblock. 77419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 77519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MMP_MAGIC 0x004D4D50 /* ASCII for MMP */ 77619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MMP_CLEAN 0xFF4D4D50 /* Value of mmp_seq for clean unmount */ 77719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MMP_FSCK_ON 0xE24D4D50 /* Value of mmp_seq when being fscked */ 77819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 77919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Projectstruct mmp_struct { 78019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 mmp_magic; 78119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 mmp_seq; 78219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u64 mmp_time; 78319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char mmp_nodename[64]; 78419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project char mmp_bdevname[32]; 78519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 mmp_interval; 78619dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u16 mmp_pad1; 78719dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project __u32 mmp_pad2; 78819dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project}; 78919dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 79019dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project/* 79119dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project * Interval in number of seconds to update the MMP sequence number. 79219dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project */ 79319dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#define EXT2_MMP_DEF_INTERVAL 5 79419dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project 79519dacda2b02bb08c0ffb649f84526b249c749279The Android Open Source Project#endif /* _LINUX_EXT2_FS_H */ 796