| /* |
| * linux/include/linux/ext2_fs.h |
| * |
| * Copyright (C) 1992, 1993, 1994, 1995 |
| * Remy Card (card@masi.ibp.fr) |
| * Laboratoire MASI - Institut Blaise Pascal |
| * Universite Pierre et Marie Curie (Paris VI) |
| * |
| * from |
| * |
| * linux/include/linux/minix_fs.h |
| * |
| * Copyright (C) 1991, 1992 Linus Torvalds |
| */ |
| |
| #ifndef _LINUX_EXT2_FS_H |
| #define _LINUX_EXT2_FS_H |
| |
| #include <linux/types.h> |
| #include <linux/magic.h> |
| |
| /* |
| * The second extended filesystem constants/structures |
| */ |
| |
| /* |
| * Define EXT2FS_DEBUG to produce debug messages |
| */ |
| #undef EXT2FS_DEBUG |
| |
| /* |
| * Define EXT2_RESERVATION to reserve data blocks for expanding files |
| */ |
| #define EXT2_DEFAULT_RESERVE_BLOCKS 8 |
| /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ |
| #define EXT2_MAX_RESERVE_BLOCKS 1027 |
| #define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0 |
| /* |
| * The second extended file system version |
| */ |
| #define EXT2FS_DATE "95/08/09" |
| #define EXT2FS_VERSION "0.5b" |
| |
| /* |
| * Debug code |
| */ |
| #ifdef EXT2FS_DEBUG |
| # define ext2_debug(f, a...) { \ |
| printk ("EXT2-fs DEBUG (%s, %d): %s:", \ |
| __FILE__, __LINE__, __func__); \ |
| printk (f, ## a); \ |
| } |
| #else |
| # define ext2_debug(f, a...) /**/ |
| #endif |
| |
| /* |
| * Special inode numbers |
| */ |
| #define EXT2_BAD_INO 1 /* Bad blocks inode */ |
| #define EXT2_ROOT_INO 2 /* Root inode */ |
| #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ |
| #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ |
| |
| /* First non-reserved inode for old ext2 filesystems */ |
| #define EXT2_GOOD_OLD_FIRST_INO 11 |
| |
| /* Assume that user mode programs are passing in an ext2fs superblock, not |
| * a kernel struct super_block. This will allow us to call the feature-test |
| * macros from user land. */ |
| #define EXT2_SB(sb) (sb) |
| |
| /* |
| * Maximal count of links to a file |
| */ |
| #define EXT2_LINK_MAX 32000 |
| |
| /* |
| * Macro-instructions used to manage several block sizes |
| */ |
| #define EXT2_MIN_BLOCK_SIZE 1024 |
| #define EXT2_MAX_BLOCK_SIZE 4096 |
| #define EXT2_MIN_BLOCK_LOG_SIZE 10 |
| # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
| #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32)) |
| # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
| #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ |
| EXT2_GOOD_OLD_INODE_SIZE : \ |
| (s)->s_inode_size) |
| #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ |
| EXT2_GOOD_OLD_FIRST_INO : \ |
| (s)->s_first_ino) |
| |
| /* |
| * Macro-instructions used to manage fragments |
| */ |
| #define EXT2_MIN_FRAG_SIZE 1024 |
| #define EXT2_MAX_FRAG_SIZE 4096 |
| #define EXT2_MIN_FRAG_LOG_SIZE 10 |
| # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) |
| # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) |
| |
| /* |
| * Structure of a blocks group descriptor |
| */ |
| struct ext2_group_desc |
| { |
| __le32 bg_block_bitmap; /* Blocks bitmap block */ |
| __le32 bg_inode_bitmap; /* Inodes bitmap block */ |
| __le32 bg_inode_table; /* Inodes table block */ |
| __le16 bg_free_blocks_count; /* Free blocks count */ |
| __le16 bg_free_inodes_count; /* Free inodes count */ |
| __le16 bg_used_dirs_count; /* Directories count */ |
| __le16 bg_pad; |
| __le32 bg_reserved[3]; |
| }; |
| |
| /* |
| * Macro-instructions used to manage group descriptors |
| */ |
| # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
| # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc)) |
| # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
| |
| /* |
| * Constants relative to the data blocks |
| */ |
| #define EXT2_NDIR_BLOCKS 12 |
| #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS |
| #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) |
| #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) |
| #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) |
| |
| /* |
| * Inode flags (GETFLAGS/SETFLAGS) |
| */ |
| #define EXT2_SECRM_FL FS_SECRM_FL /* Secure deletion */ |
| #define EXT2_UNRM_FL FS_UNRM_FL /* Undelete */ |
| #define EXT2_COMPR_FL FS_COMPR_FL /* Compress file */ |
| #define EXT2_SYNC_FL FS_SYNC_FL /* Synchronous updates */ |
| #define EXT2_IMMUTABLE_FL FS_IMMUTABLE_FL /* Immutable file */ |
| #define EXT2_APPEND_FL FS_APPEND_FL /* writes to file may only append */ |
| #define EXT2_NODUMP_FL FS_NODUMP_FL /* do not dump file */ |
| #define EXT2_NOATIME_FL FS_NOATIME_FL /* do not update atime */ |
| /* Reserved for compression usage... */ |
| #define EXT2_DIRTY_FL FS_DIRTY_FL |
| #define EXT2_COMPRBLK_FL FS_COMPRBLK_FL /* One or more compressed clusters */ |
| #define EXT2_NOCOMP_FL FS_NOCOMP_FL /* Don't compress */ |
| #define EXT2_ECOMPR_FL FS_ECOMPR_FL /* Compression error */ |
| /* End compression flags --- maybe not all used */ |
| #define EXT2_BTREE_FL FS_BTREE_FL /* btree format dir */ |
| #define EXT2_INDEX_FL FS_INDEX_FL /* hash-indexed directory */ |
| #define EXT2_IMAGIC_FL FS_IMAGIC_FL /* AFS directory */ |
| #define EXT2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL /* Reserved for ext3 */ |
| #define EXT2_NOTAIL_FL FS_NOTAIL_FL /* file tail should not be merged */ |
| #define EXT2_DIRSYNC_FL FS_DIRSYNC_FL /* dirsync behaviour (directories only) */ |
| #define EXT2_TOPDIR_FL FS_TOPDIR_FL /* Top of directory hierarchies*/ |
| #define EXT2_RESERVED_FL FS_RESERVED_FL /* reserved for ext2 lib */ |
| |
| #define EXT2_FL_USER_VISIBLE FS_FL_USER_VISIBLE /* User visible flags */ |
| #define EXT2_FL_USER_MODIFIABLE FS_FL_USER_MODIFIABLE /* User modifiable flags */ |
| |
| /* Flags that should be inherited by new inodes from their parent. */ |
| #define EXT2_FL_INHERITED (EXT2_SECRM_FL | EXT2_UNRM_FL | EXT2_COMPR_FL |\ |
| EXT2_SYNC_FL | EXT2_IMMUTABLE_FL | EXT2_APPEND_FL |\ |
| EXT2_NODUMP_FL | EXT2_NOATIME_FL | EXT2_COMPRBLK_FL|\ |
| EXT2_NOCOMP_FL | EXT2_JOURNAL_DATA_FL |\ |
| EXT2_NOTAIL_FL | EXT2_DIRSYNC_FL) |
| |
| /* Flags that are appropriate for regular files (all but dir-specific ones). */ |
| #define EXT2_REG_FLMASK (~(EXT2_DIRSYNC_FL | EXT2_TOPDIR_FL)) |
| |
| /* Flags that are appropriate for non-directories/regular files. */ |
| #define EXT2_OTHER_FLMASK (EXT2_NODUMP_FL | EXT2_NOATIME_FL) |
| |
| /* Mask out flags that are inappropriate for the given type of inode. */ |
| static __inline__ __u32 ext2_mask_flags(umode_t mode, __u32 flags) |
| { |
| if (S_ISDIR(mode)) |
| return flags; |
| else if (S_ISREG(mode)) |
| return flags & EXT2_REG_FLMASK; |
| else |
| return flags & EXT2_OTHER_FLMASK; |
| } |
| |
| /* |
| * ioctl commands |
| */ |
| #define EXT2_IOC_GETFLAGS FS_IOC_GETFLAGS |
| #define EXT2_IOC_SETFLAGS FS_IOC_SETFLAGS |
| #define EXT2_IOC_GETVERSION FS_IOC_GETVERSION |
| #define EXT2_IOC_SETVERSION FS_IOC_SETVERSION |
| #define EXT2_IOC_GETRSVSZ _IOR('f', 5, long) |
| #define EXT2_IOC_SETRSVSZ _IOW('f', 6, long) |
| |
| /* |
| * ioctl commands in 32 bit emulation |
| */ |
| #define EXT2_IOC32_GETFLAGS FS_IOC32_GETFLAGS |
| #define EXT2_IOC32_SETFLAGS FS_IOC32_SETFLAGS |
| #define EXT2_IOC32_GETVERSION FS_IOC32_GETVERSION |
| #define EXT2_IOC32_SETVERSION FS_IOC32_SETVERSION |
| |
| /* |
| * Structure of an inode on the disk |
| */ |
| struct ext2_inode { |
| __le16 i_mode; /* File mode */ |
| __le16 i_uid; /* Low 16 bits of Owner Uid */ |
| __le32 i_size; /* Size in bytes */ |
| __le32 i_atime; /* Access time */ |
| __le32 i_ctime; /* Creation time */ |
| __le32 i_mtime; /* Modification time */ |
| __le32 i_dtime; /* Deletion Time */ |
| __le16 i_gid; /* Low 16 bits of Group Id */ |
| __le16 i_links_count; /* Links count */ |
| __le32 i_blocks; /* Blocks count */ |
| __le32 i_flags; /* File flags */ |
| union { |
| struct { |
| __le32 l_i_reserved1; |
| } linux1; |
| struct { |
| __le32 h_i_translator; |
| } hurd1; |
| struct { |
| __le32 m_i_reserved1; |
| } masix1; |
| } osd1; /* OS dependent 1 */ |
| __le32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ |
| __le32 i_generation; /* File version (for NFS) */ |
| __le32 i_file_acl; /* File ACL */ |
| __le32 i_dir_acl; /* Directory ACL */ |
| __le32 i_faddr; /* Fragment address */ |
| union { |
| struct { |
| __u8 l_i_frag; /* Fragment number */ |
| __u8 l_i_fsize; /* Fragment size */ |
| __u16 i_pad1; |
| __le16 l_i_uid_high; /* these 2 fields */ |
| __le16 l_i_gid_high; /* were reserved2[0] */ |
| __u32 l_i_reserved2; |
| } linux2; |
| struct { |
| __u8 h_i_frag; /* Fragment number */ |
| __u8 h_i_fsize; /* Fragment size */ |
| __le16 h_i_mode_high; |
| __le16 h_i_uid_high; |
| __le16 h_i_gid_high; |
| __le32 h_i_author; |
| } hurd2; |
| struct { |
| __u8 m_i_frag; /* Fragment number */ |
| __u8 m_i_fsize; /* Fragment size */ |
| __u16 m_pad1; |
| __u32 m_i_reserved2[2]; |
| } masix2; |
| } osd2; /* OS dependent 2 */ |
| }; |
| |
| #define i_size_high i_dir_acl |
| |
| #if defined(__KERNEL__) || defined(__linux__) |
| #define i_reserved1 osd1.linux1.l_i_reserved1 |
| #define i_frag osd2.linux2.l_i_frag |
| #define i_fsize osd2.linux2.l_i_fsize |
| #define i_uid_low i_uid |
| #define i_gid_low i_gid |
| #define i_uid_high osd2.linux2.l_i_uid_high |
| #define i_gid_high osd2.linux2.l_i_gid_high |
| #define i_reserved2 osd2.linux2.l_i_reserved2 |
| #endif |
| |
| #ifdef __hurd__ |
| #define i_translator osd1.hurd1.h_i_translator |
| #define i_frag osd2.hurd2.h_i_frag |
| #define i_fsize osd2.hurd2.h_i_fsize |
| #define i_uid_high osd2.hurd2.h_i_uid_high |
| #define i_gid_high osd2.hurd2.h_i_gid_high |
| #define i_author osd2.hurd2.h_i_author |
| #endif |
| |
| #ifdef __masix__ |
| #define i_reserved1 osd1.masix1.m_i_reserved1 |
| #define i_frag osd2.masix2.m_i_frag |
| #define i_fsize osd2.masix2.m_i_fsize |
| #define i_reserved2 osd2.masix2.m_i_reserved2 |
| #endif |
| |
| /* |
| * File system states |
| */ |
| #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ |
| #define EXT2_ERROR_FS 0x0002 /* Errors detected */ |
| |
| /* |
| * Mount flags |
| */ |
| #define EXT2_MOUNT_CHECK 0x000001 /* Do mount-time checks */ |
| #define EXT2_MOUNT_OLDALLOC 0x000002 /* Don't use the new Orlov allocator */ |
| #define EXT2_MOUNT_GRPID 0x000004 /* Create files with directory's group */ |
| #define EXT2_MOUNT_DEBUG 0x000008 /* Some debugging messages */ |
| #define EXT2_MOUNT_ERRORS_CONT 0x000010 /* Continue on errors */ |
| #define EXT2_MOUNT_ERRORS_RO 0x000020 /* Remount fs ro on errors */ |
| #define EXT2_MOUNT_ERRORS_PANIC 0x000040 /* Panic on errors */ |
| #define EXT2_MOUNT_MINIX_DF 0x000080 /* Mimics the Minix statfs */ |
| #define EXT2_MOUNT_NOBH 0x000100 /* No buffer_heads */ |
| #define EXT2_MOUNT_NO_UID32 0x000200 /* Disable 32-bit UIDs */ |
| #define EXT2_MOUNT_XATTR_USER 0x004000 /* Extended user attributes */ |
| #define EXT2_MOUNT_POSIX_ACL 0x008000 /* POSIX Access Control Lists */ |
| #define EXT2_MOUNT_XIP 0x010000 /* Execute in place */ |
| #define EXT2_MOUNT_USRQUOTA 0x020000 /* user quota */ |
| #define EXT2_MOUNT_GRPQUOTA 0x040000 /* group quota */ |
| #define EXT2_MOUNT_RESERVATION 0x080000 /* Preallocation */ |
| |
| |
| #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt |
| #define set_opt(o, opt) o |= EXT2_MOUNT_##opt |
| #define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \ |
| EXT2_MOUNT_##opt) |
| /* |
| * Maximal mount counts between two filesystem checks |
| */ |
| #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
| #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */ |
| |
| /* |
| * Behaviour when detecting errors |
| */ |
| #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ |
| #define EXT2_ERRORS_RO 2 /* Remount fs read-only */ |
| #define EXT2_ERRORS_PANIC 3 /* Panic */ |
| #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE |
| |
| /* |
| * Structure of the super block |
| */ |
| struct ext2_super_block { |
| __le32 s_inodes_count; /* Inodes count */ |
| __le32 s_blocks_count; /* Blocks count */ |
| __le32 s_r_blocks_count; /* Reserved blocks count */ |
| __le32 s_free_blocks_count; /* Free blocks count */ |
| __le32 s_free_inodes_count; /* Free inodes count */ |
| __le32 s_first_data_block; /* First Data Block */ |
| __le32 s_log_block_size; /* Block size */ |
| __le32 s_log_frag_size; /* Fragment size */ |
| __le32 s_blocks_per_group; /* # Blocks per group */ |
| __le32 s_frags_per_group; /* # Fragments per group */ |
| __le32 s_inodes_per_group; /* # Inodes per group */ |
| __le32 s_mtime; /* Mount time */ |
| __le32 s_wtime; /* Write time */ |
| __le16 s_mnt_count; /* Mount count */ |
| __le16 s_max_mnt_count; /* Maximal mount count */ |
| __le16 s_magic; /* Magic signature */ |
| __le16 s_state; /* File system state */ |
| __le16 s_errors; /* Behaviour when detecting errors */ |
| __le16 s_minor_rev_level; /* minor revision level */ |
| __le32 s_lastcheck; /* time of last check */ |
| __le32 s_checkinterval; /* max. time between checks */ |
| __le32 s_creator_os; /* OS */ |
| __le32 s_rev_level; /* Revision level */ |
| __le16 s_def_resuid; /* Default uid for reserved blocks */ |
| __le16 s_def_resgid; /* Default gid for reserved blocks */ |
| /* |
| * These fields are for EXT2_DYNAMIC_REV superblocks only. |
| * |
| * Note: the difference between the compatible feature set and |
| * the incompatible feature set is that if there is a bit set |
| * in the incompatible feature set that the kernel doesn't |
| * know about, it should refuse to mount the filesystem. |
| * |
| * e2fsck's requirements are more strict; if it doesn't know |
| * about a feature in either the compatible or incompatible |
| * feature set, it must abort and not try to meddle with |
| * things it doesn't understand... |
| */ |
| __le32 s_first_ino; /* First non-reserved inode */ |
| __le16 s_inode_size; /* size of inode structure */ |
| __le16 s_block_group_nr; /* block group # of this superblock */ |
| __le32 s_feature_compat; /* compatible feature set */ |
| __le32 s_feature_incompat; /* incompatible feature set */ |
| __le32 s_feature_ro_compat; /* readonly-compatible feature set */ |
| __u8 s_uuid[16]; /* 128-bit uuid for volume */ |
| char s_volume_name[16]; /* volume name */ |
| char s_last_mounted[64]; /* directory where last mounted */ |
| __le32 s_algorithm_usage_bitmap; /* For compression */ |
| /* |
| * Performance hints. Directory preallocation should only |
| * happen if the EXT2_COMPAT_PREALLOC flag is on. |
| */ |
| __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ |
| __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ |
| __u16 s_padding1; |
| /* |
| * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set. |
| */ |
| __u8 s_journal_uuid[16]; /* uuid of journal superblock */ |
| __u32 s_journal_inum; /* inode number of journal file */ |
| __u32 s_journal_dev; /* device number of journal file */ |
| __u32 s_last_orphan; /* start of list of inodes to delete */ |
| __u32 s_hash_seed[4]; /* HTREE hash seed */ |
| __u8 s_def_hash_version; /* Default hash version to use */ |
| __u8 s_reserved_char_pad; |
| __u16 s_reserved_word_pad; |
| __le32 s_default_mount_opts; |
| __le32 s_first_meta_bg; /* First metablock block group */ |
| __u32 s_reserved[190]; /* Padding to the end of the block */ |
| }; |
| |
| /* |
| * Codes for operating systems |
| */ |
| #define EXT2_OS_LINUX 0 |
| #define EXT2_OS_HURD 1 |
| #define EXT2_OS_MASIX 2 |
| #define EXT2_OS_FREEBSD 3 |
| #define EXT2_OS_LITES 4 |
| |
| /* |
| * Revision levels |
| */ |
| #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ |
| #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ |
| |
| #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV |
| #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV |
| |
| #define EXT2_GOOD_OLD_INODE_SIZE 128 |
| |
| /* |
| * Feature set definitions |
| */ |
| |
| #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ |
| ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) |
| #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ |
| ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) |
| #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ |
| ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) |
| #define EXT2_SET_COMPAT_FEATURE(sb,mask) \ |
| EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) |
| #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \ |
| EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) |
| #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \ |
| EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) |
| #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \ |
| EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) |
| #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ |
| EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) |
| #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \ |
| EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) |
| |
| #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001 |
| #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002 |
| #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 |
| #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008 |
| #define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010 |
| #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020 |
| #define EXT2_FEATURE_COMPAT_ANY 0xffffffff |
| |
| #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 |
| #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 |
| #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 |
| #define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff |
| |
| #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 |
| #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 |
| #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 |
| #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 |
| #define EXT2_FEATURE_INCOMPAT_META_BG 0x0010 |
| #define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff |
| |
| #define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR |
| #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \ |
| EXT2_FEATURE_INCOMPAT_META_BG) |
| #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
| EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ |
| EXT2_FEATURE_RO_COMPAT_BTREE_DIR) |
| #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP |
| #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP |
| |
| /* |
| * Default values for user and/or group using reserved blocks |
| */ |
| #define EXT2_DEF_RESUID 0 |
| #define EXT2_DEF_RESGID 0 |
| |
| /* |
| * Default mount options |
| */ |
| #define EXT2_DEFM_DEBUG 0x0001 |
| #define EXT2_DEFM_BSDGROUPS 0x0002 |
| #define EXT2_DEFM_XATTR_USER 0x0004 |
| #define EXT2_DEFM_ACL 0x0008 |
| #define EXT2_DEFM_UID16 0x0010 |
| /* Not used by ext2, but reserved for use by ext3 */ |
| #define EXT3_DEFM_JMODE 0x0060 |
| #define EXT3_DEFM_JMODE_DATA 0x0020 |
| #define EXT3_DEFM_JMODE_ORDERED 0x0040 |
| #define EXT3_DEFM_JMODE_WBACK 0x0060 |
| |
| /* |
| * Structure of a directory entry |
| */ |
| #define EXT2_NAME_LEN 255 |
| |
| struct ext2_dir_entry { |
| __le32 inode; /* Inode number */ |
| __le16 rec_len; /* Directory entry length */ |
| __le16 name_len; /* Name length */ |
| char name[EXT2_NAME_LEN]; /* File name */ |
| }; |
| |
| /* |
| * The new version of the directory entry. Since EXT2 structures are |
| * stored in intel byte order, and the name_len field could never be |
| * bigger than 255 chars, it's safe to reclaim the extra byte for the |
| * file_type field. |
| */ |
| struct ext2_dir_entry_2 { |
| __le32 inode; /* Inode number */ |
| __le16 rec_len; /* Directory entry length */ |
| __u8 name_len; /* Name length */ |
| __u8 file_type; |
| char name[EXT2_NAME_LEN]; /* File name */ |
| }; |
| |
| /* |
| * Ext2 directory file types. Only the low 3 bits are used. The |
| * other bits are reserved for now. |
| */ |
| enum { |
| EXT2_FT_UNKNOWN, |
| EXT2_FT_REG_FILE, |
| EXT2_FT_DIR, |
| EXT2_FT_CHRDEV, |
| EXT2_FT_BLKDEV, |
| EXT2_FT_FIFO, |
| EXT2_FT_SOCK, |
| EXT2_FT_SYMLINK, |
| EXT2_FT_MAX |
| }; |
| |
| /* |
| * EXT2_DIR_PAD defines the directory entries boundaries |
| * |
| * NOTE: It must be a multiple of 4 |
| */ |
| #define EXT2_DIR_PAD 4 |
| #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) |
| #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ |
| ~EXT2_DIR_ROUND) |
| #define EXT2_MAX_REC_LEN ((1<<16)-1) |
| |
| #endif /* _LINUX_EXT2_FS_H */ |