+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * 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)
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- */
-
-#ifndef LINUX_EXT2_FS_H
-#define LINUX_EXT2_FS_H 1
-
-/*
- * Special inode numbers
- */
-#define EXT2_BAD_INO 1 /* Bad blocks inode */
-#define EXT2_ROOT_INO 2 /* Root inode */
-#define EXT2_ACL_IDX_INO 3 /* ACL inode */
-#define EXT2_ACL_DATA_INO 4 /* ACL inode */
-#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
-#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
-#define EXT2_RESIZE_INO 7 /* Reserved group descriptors inode */
-#define EXT2_JOURNAL_INO 8 /* Journal inode */
-
-/* First non-reserved inode for old ext2 filesystems */
-#define EXT2_GOOD_OLD_FIRST_INO 11
-
-/*
- * The second extended file system magic number
- */
-#define EXT2_SUPER_MAGIC 0xEF53
-
-/* 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_LOG_SIZE 10 /* 1024 */
-#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */
-#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE)
-#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE)
-#define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
-#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)
-#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(uint32_t))
-
-/*
- * Macro-instructions used to manage fragments
- */
-#define EXT2_MIN_FRAG_SIZE EXT2_MIN_BLOCK_SIZE
-#define EXT2_MAX_FRAG_SIZE EXT2_MAX_BLOCK_SIZE
-#define EXT2_MIN_FRAG_LOG_SIZE EXT2_MIN_BLOCK_LOG_SIZE
-#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))
-
-/*
- * ACL structures
- */
-struct ext2_acl_header { /* Header of Access Control Lists */
- uint32_t aclh_size;
- uint32_t aclh_file_count;
- uint32_t aclh_acle_count;
- uint32_t aclh_first_acle;
-};
-
-struct ext2_acl_entry { /* Access Control List Entry */
- uint32_t acle_size;
- uint16_t acle_perms; /* Access permissions */
- uint16_t acle_type; /* Type of entry */
- uint16_t acle_tag; /* User or group identity */
- uint16_t acle_pad1;
- uint32_t acle_next; /* Pointer on next entry for the */
- /* same inode or on next free entry */
-};
-
-/*
- * Structure of a blocks group descriptor
- */
-struct ext2_group_desc {
- uint32_t bg_block_bitmap; /* Blocks bitmap block */
- uint32_t bg_inode_bitmap; /* Inodes bitmap block */
- uint32_t bg_inode_table; /* Inodes table block */
- uint16_t bg_free_blocks_count; /* Free blocks count */
- uint16_t bg_free_inodes_count; /* Free inodes count */
- uint16_t bg_used_dirs_count; /* Directories count */
- uint16_t bg_pad;
- uint32_t bg_reserved[3];
-};
-
-/*
- * Data structures used by the directory indexing feature
- *
- * Note: all of the multibyte integer fields are little endian.
- */
-
-/*
- * Note: dx_root_info is laid out so that if it should somehow get
- * overlaid by a dirent the two low bits of the hash version will be
- * zero. Therefore, the hash version mod 4 should never be 0.
- * Sincerely, the paranoia department.
- */
-struct ext2_dx_root_info {
- uint32_t reserved_zero;
- uint8_t hash_version; /* 0 now, 1 at release */
- uint8_t info_length; /* 8 */
- uint8_t indirect_levels;
- uint8_t unused_flags;
-};
-
-#define EXT2_HASH_LEGACY 0
-#define EXT2_HASH_HALF_MD4 1
-#define EXT2_HASH_TEA 2
-
-#define EXT2_HASH_FLAG_INCOMPAT 0x1
-
-struct ext2_dx_entry {
- uint32_t hash;
- uint32_t block;
-};
-
-struct ext2_dx_countlimit {
- uint16_t limit;
- uint16_t count;
-};
-
-
-/*
- * Macro-instructions used to manage group descriptors
- */
-#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group)
-#define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group)
-#define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s))
-/* limits imposed by 16-bit value gd_free_{blocks,inode}_count */
-#define EXT2_MAX_BLOCKS_PER_GROUP(s) ((1 << 16) - 8)
-#define EXT2_MAX_INODES_PER_GROUP(s) ((1 << 16) - EXT2_INODES_PER_BLOCK(s))
-#define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
-
-/*
- * 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
- */
-#define EXT2_SECRM_FL 0x00000001 /* Secure deletion */
-#define EXT2_UNRM_FL 0x00000002 /* Undelete */
-#define EXT2_COMPR_FL 0x00000004 /* Compress file */
-#define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */
-#define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */
-#define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */
-#define EXT2_NODUMP_FL 0x00000040 /* do not dump file */
-#define EXT2_NOATIME_FL 0x00000080 /* do not update atime */
-/* Reserved for compression usage... */
-#define EXT2_DIRTY_FL 0x00000100
-#define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
-#define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */
-#define EXT2_ECOMPR_FL 0x00000800 /* Compression error */
-/* End compression flags --- maybe not all used */
-#define EXT2_BTREE_FL 0x00001000 /* btree format dir */
-#define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */
-#define EXT2_IMAGIC_FL 0x00002000
-#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
-#define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */
-#define EXT2_DIRSYNC_FL 0x00010000 /* Synchronous directory modifications */
-#define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
-#define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */
-#define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
-
-#define EXT2_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
-#define EXT2_FL_USER_MODIFIABLE 0x000080FF /* User modifiable flags */
-
-/*
- * ioctl commands
- */
-#define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
-#define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
-#define EXT2_IOC_GETVERSION _IOR('v', 1, long)
-#define EXT2_IOC_SETVERSION _IOW('v', 2, long)
-
-/*
- * Structure of an inode on the disk
- */
-struct ext2_inode {
- uint16_t i_mode; /* File mode */
- uint16_t i_uid; /* Low 16 bits of Owner Uid */
- uint32_t i_size; /* Size in bytes */
- uint32_t i_atime; /* Access time */
- uint32_t i_ctime; /* Creation time */
- uint32_t i_mtime; /* Modification time */
- uint32_t i_dtime; /* Deletion Time */
- uint16_t i_gid; /* Low 16 bits of Group Id */
- uint16_t i_links_count; /* Links count */
- uint32_t i_blocks; /* Blocks count */
- uint32_t i_flags; /* File flags */
- union {
- struct {
- uint32_t l_i_reserved1;
- } linux1;
- struct {
- uint32_t h_i_translator;
- } hurd1;
- struct {
- uint32_t m_i_reserved1;
- } masix1;
- } osd1; /* OS dependent 1 */
- uint32_t i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
- uint32_t i_generation; /* File version (for NFS) */
- uint32_t i_file_acl; /* File ACL */
- uint32_t i_dir_acl; /* Directory ACL */
- uint32_t i_faddr; /* Fragment address */
- union {
- struct {
- uint8_t l_i_frag; /* Fragment number */
- uint8_t l_i_fsize; /* Fragment size */
- uint16_t i_pad1;
- uint16_t l_i_uid_high; /* these 2 fields */
- uint16_t l_i_gid_high; /* were reserved2[0] */
- uint32_t l_i_reserved2;
- } linux2;
- struct {
- uint8_t h_i_frag; /* Fragment number */
- uint8_t h_i_fsize; /* Fragment size */
- uint16_t h_i_mode_high;
- uint16_t h_i_uid_high;
- uint16_t h_i_gid_high;
- uint32_t h_i_author;
- } hurd2;
- struct {
- uint8_t m_i_frag; /* Fragment number */
- uint8_t m_i_fsize; /* Fragment size */
- uint16_t m_pad1;
- uint32_t m_i_reserved2[2];
- } masix2;
- } osd2; /* OS dependent 2 */
-};
-
-/*
- * Permanent part of an large inode on the disk
- */
-struct ext2_inode_large {
- uint16_t i_mode; /* File mode */
- uint16_t i_uid; /* Low 16 bits of Owner Uid */
- uint32_t i_size; /* Size in bytes */
- uint32_t i_atime; /* Access time */
- uint32_t i_ctime; /* Creation time */
- uint32_t i_mtime; /* Modification time */
- uint32_t i_dtime; /* Deletion Time */
- uint16_t i_gid; /* Low 16 bits of Group Id */
- uint16_t i_links_count; /* Links count */
- uint32_t i_blocks; /* Blocks count */
- uint32_t i_flags; /* File flags */
- union {
- struct {
- uint32_t l_i_reserved1;
- } linux1;
- struct {
- uint32_t h_i_translator;
- } hurd1;
- struct {
- uint32_t m_i_reserved1;
- } masix1;
- } osd1; /* OS dependent 1 */
- uint32_t i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
- uint32_t i_generation; /* File version (for NFS) */
- uint32_t i_file_acl; /* File ACL */
- uint32_t i_dir_acl; /* Directory ACL */
- uint32_t i_faddr; /* Fragment address */
- union {
- struct {
- uint8_t l_i_frag; /* Fragment number */
- uint8_t l_i_fsize; /* Fragment size */
- uint16_t i_pad1;
- uint16_t l_i_uid_high; /* these 2 fields */
- uint16_t l_i_gid_high; /* were reserved2[0] */
- uint32_t l_i_reserved2;
- } linux2;
- struct {
- uint8_t h_i_frag; /* Fragment number */
- uint8_t h_i_fsize; /* Fragment size */
- uint16_t h_i_mode_high;
- uint16_t h_i_uid_high;
- uint16_t h_i_gid_high;
- uint32_t h_i_author;
- } hurd2;
- struct {
- uint8_t m_i_frag; /* Fragment number */
- uint8_t m_i_fsize; /* Fragment size */
- uint16_t m_pad1;
- uint32_t m_i_reserved2[2];
- } masix2;
- } osd2; /* OS dependent 2 */
- uint16_t i_extra_isize;
- uint16_t i_pad1;
-};
-
-#define i_size_high i_dir_acl
-
-/*
- * File system states
- */
-#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
-#define EXT2_ERROR_FS 0x0002 /* Errors detected */
-
-/*
- * Mount flags
- */
-#define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */
-#define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
-#define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
-#define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
-#define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
-#define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
-#define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
-#define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */
-
-#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 {
- uint32_t s_inodes_count; /* Inodes count */
- uint32_t s_blocks_count; /* Blocks count */
- uint32_t s_r_blocks_count; /* Reserved blocks count */
- uint32_t s_free_blocks_count; /* Free blocks count */
- uint32_t s_free_inodes_count; /* Free inodes count */
- uint32_t s_first_data_block; /* First Data Block */
- uint32_t s_log_block_size; /* Block size */
- int32_t s_log_frag_size; /* Fragment size */
- uint32_t s_blocks_per_group; /* # Blocks per group */
- uint32_t s_frags_per_group; /* # Fragments per group */
- uint32_t s_inodes_per_group; /* # Inodes per group */
- uint32_t s_mtime; /* Mount time */
- uint32_t s_wtime; /* Write time */
- uint16_t s_mnt_count; /* Mount count */
- int16_t s_max_mnt_count; /* Maximal mount count */
- uint16_t s_magic; /* Magic signature */
- uint16_t s_state; /* File system state */
- uint16_t s_errors; /* Behaviour when detecting errors */
- uint16_t s_minor_rev_level; /* minor revision level */
- uint32_t s_lastcheck; /* time of last check */
- uint32_t s_checkinterval; /* max. time between checks */
- uint32_t s_creator_os; /* OS */
- uint32_t s_rev_level; /* Revision level */
- uint16_t s_def_resuid; /* Default uid for reserved blocks */
- uint16_t 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...
- */
- uint32_t s_first_ino; /* First non-reserved inode */
- uint16_t s_inode_size; /* size of inode structure */
- uint16_t s_block_group_nr; /* block group # of this superblock */
- uint32_t s_feature_compat; /* compatible feature set */
- uint32_t s_feature_incompat; /* incompatible feature set */
- uint32_t s_feature_ro_compat; /* readonly-compatible feature set */
- uint8_t s_uuid[16]; /* 128-bit uuid for volume */
- char s_volume_name[16]; /* volume name */
- char s_last_mounted[64]; /* directory where last mounted */
- uint32_t s_algorithm_usage_bitmap; /* For compression */
- /*
- * Performance hints. Directory preallocation should only
- * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on.
- */
- uint8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
- uint8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
- uint16_t s_reserved_gdt_blocks; /* Per group table for online growth */
- /*
- * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set.
- */
- uint8_t s_journal_uuid[16]; /* uuid of journal superblock */
- uint32_t s_journal_inum; /* inode number of journal file */
- uint32_t s_journal_dev; /* device number of journal file */
- uint32_t s_last_orphan; /* start of list of inodes to delete */
- uint32_t s_hash_seed[4]; /* HTREE hash seed */
- uint8_t s_def_hash_version; /* Default hash version to use */
- uint8_t s_jnl_backup_type; /* Default type of journal backup */
- uint16_t s_reserved_word_pad;
- uint32_t s_default_mount_opts;
- uint32_t s_first_meta_bg; /* First metablock group */
- uint32_t s_mkfs_time; /* When the filesystem was created */
- uint32_t s_jnl_blocks[17]; /* Backup of the journal inode */
- uint32_t s_reserved[172]; /* 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
-
-/*
- * Journal inode backup types
- */
-#define EXT3_JNL_BACKUP_BLOCKS 1
-
-/*
- * Feature set definitions
- */
-
-#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
- ( EXT2_SB(sb)->s_feature_compat & (mask) )
-#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
- ( EXT2_SB(sb)->s_feature_ro_compat & (mask) )
-#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
- ( EXT2_SB(sb)->s_feature_incompat & (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_INODE 0x0010
-#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
-
-#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
-#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
-/* #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 not used */
-
-#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
-#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
-#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
-#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
-#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
-#define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040
-
-
-#define EXT2_FEATURE_COMPAT_SUPP 0
-#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE)
-#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
- EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
- EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
-
-/*
- * 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
-#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 {
- uint32_t inode; /* Inode number */
- uint16_t rec_len; /* Directory entry length */
- uint16_t 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 {
- uint32_t inode; /* Inode number */
- uint16_t rec_len; /* Directory entry length */
- uint8_t name_len; /* Name length */
- uint8_t 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.
- */
-#define EXT2_FT_UNKNOWN 0
-#define EXT2_FT_REG_FILE 1
-#define EXT2_FT_DIR 2
-#define EXT2_FT_CHRDEV 3
-#define EXT2_FT_BLKDEV 4
-#define EXT2_FT_FIFO 5
-#define EXT2_FT_SOCK 6
-#define EXT2_FT_SYMLINK 7
-
-#define EXT2_FT_MAX 8
-
-/*
- * 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)
-
-#endif
*/
/* Constants and structures */
-#include "e2fs_defs.h"
+#include "bb_e2fs_defs.h"
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
* s_reserved_gdt_blocks must be zero.
*/
if (!(fs->super->s_feature_compat &
- EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
+ EXT2_FEATURE_COMPAT_RESIZE_INO)) {
if (fs->super->s_reserved_gdt_blocks) {
pctx.num = fs->super->s_reserved_gdt_blocks;
if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
if (retval) {
if (fs->super->s_feature_compat &
- EXT2_FEATURE_COMPAT_RESIZE_INODE)
+ EXT2_FEATURE_COMPAT_RESIZE_INO)
ctx->flags |= E2F_FLAG_RESIZE_INODE;
return;
}
* the resize inode is cleared; then we're done.
*/
if (!(fs->super->s_feature_compat &
- EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
+ EXT2_FEATURE_COMPAT_RESIZE_INO)) {
for (i=0; i < EXT2_N_BLOCKS; i++) {
if (inode.i_block[i])
break;
"ext_attr" },
{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX,
"dir_index" },
- { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_RESIZE_INODE,
+ { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_RESIZE_INO,
"resize_inode" },
{ E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER,
"sparse_super" },
#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_INODE 0x0010
+#define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\
EXT2_FEATURE_COMPAT_IMAGIC_INODES|\
EXT3_FEATURE_COMPAT_HAS_JOURNAL|\
- EXT2_FEATURE_COMPAT_RESIZE_INODE|\
+ EXT2_FEATURE_COMPAT_RESIZE_INO|\
EXT2_FEATURE_COMPAT_DIR_INDEX|\
EXT2_FEATURE_COMPAT_EXT_ATTR)
/*
* check the number of reserved group descriptor table blocks
*/
- if (super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE)
+ if (super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INO)
rsv_gdt = calc_reserved_gdt_blocks(fs);
else
rsv_gdt = 0;
if (rsv_gdb > 0) {
sb_param->s_feature_compat |=
- EXT2_FEATURE_COMPAT_RESIZE_INODE;
+ EXT2_FEATURE_COMPAT_RESIZE_INO;
sb_param->s_reserved_gdt_blocks = rsv_gdb;
}
static __u32 ok_features[3] = {
EXT3_FEATURE_COMPAT_HAS_JOURNAL |
- EXT2_FEATURE_COMPAT_RESIZE_INODE |
+ EXT2_FEATURE_COMPAT_RESIZE_INO |
EXT2_FEATURE_COMPAT_DIR_INDEX, /* Compat */
EXT2_FEATURE_INCOMPAT_FILETYPE| /* Incompat */
EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|
/* Since sparse_super is the default, we would only have a problem
* here if it was explicitly disabled.
*/
- if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE) &&
+ if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INO) &&
!(param.s_feature_ro_compat&EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
bb_error_msg_and_die("reserved online resize blocks not supported "
"on non-sparse filesystem");
reserve_inodes(fs);
create_bad_block_inode(fs, bb_list);
if (fs->super->s_feature_compat &
- EXT2_FEATURE_COMPAT_RESIZE_INODE) {
+ EXT2_FEATURE_COMPAT_RESIZE_INO) {
retval = ext2fs_create_resize_inode(fs);
mke2fs_error_msg_and_die(retval, "reserve blocks for online resize");
}
*/
#include "libbb.h"
#include <linux/fs.h>
-#include "bb_linux_ext2_fs.h"
+#include "bb_e2fs_defs.h"
// storage helpers
char BUG_wrong_field_size(void);
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * 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)
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+#ifndef LINUX_EXT2_FS_H
+#define LINUX_EXT2_FS_H 1
+
+/*
+ * Special inode numbers
+ */
+#define EXT2_BAD_INO 1 /* Bad blocks inode */
+#define EXT2_ROOT_INO 2 /* Root inode */
+#define EXT2_ACL_IDX_INO 3 /* ACL inode */
+#define EXT2_ACL_DATA_INO 4 /* ACL inode */
+#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
+#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
+#define EXT2_RESIZE_INO 7 /* Reserved group descriptors inode */
+#define EXT2_JOURNAL_INO 8 /* Journal inode */
+
+/* First non-reserved inode for old ext2 filesystems */
+#define EXT2_GOOD_OLD_FIRST_INO 11
+
+/*
+ * The second extended file system magic number
+ */
+#define EXT2_SUPER_MAGIC 0xEF53
+
+/* 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_LOG_SIZE 10 /* 1024 */
+#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */
+#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE)
+#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE)
+#define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
+#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)
+#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(uint32_t))
+
+/*
+ * Macro-instructions used to manage fragments
+ */
+#define EXT2_MIN_FRAG_SIZE EXT2_MIN_BLOCK_SIZE
+#define EXT2_MAX_FRAG_SIZE EXT2_MAX_BLOCK_SIZE
+#define EXT2_MIN_FRAG_LOG_SIZE EXT2_MIN_BLOCK_LOG_SIZE
+#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))
+
+/*
+ * ACL structures
+ */
+struct ext2_acl_header { /* Header of Access Control Lists */
+ uint32_t aclh_size;
+ uint32_t aclh_file_count;
+ uint32_t aclh_acle_count;
+ uint32_t aclh_first_acle;
+};
+
+struct ext2_acl_entry { /* Access Control List Entry */
+ uint32_t acle_size;
+ uint16_t acle_perms; /* Access permissions */
+ uint16_t acle_type; /* Type of entry */
+ uint16_t acle_tag; /* User or group identity */
+ uint16_t acle_pad1;
+ uint32_t acle_next; /* Pointer on next entry for the */
+ /* same inode or on next free entry */
+};
+
+/*
+ * Structure of a blocks group descriptor
+ */
+struct ext2_group_desc {
+ uint32_t bg_block_bitmap; /* Blocks bitmap block */
+ uint32_t bg_inode_bitmap; /* Inodes bitmap block */
+ uint32_t bg_inode_table; /* Inodes table block */
+ uint16_t bg_free_blocks_count; /* Free blocks count */
+ uint16_t bg_free_inodes_count; /* Free inodes count */
+ uint16_t bg_used_dirs_count; /* Directories count */
+ uint16_t bg_pad;
+ uint32_t bg_reserved[3];
+};
+
+/*
+ * Data structures used by the directory indexing feature
+ *
+ * Note: all of the multibyte integer fields are little endian.
+ */
+
+/*
+ * Note: dx_root_info is laid out so that if it should somehow get
+ * overlaid by a dirent the two low bits of the hash version will be
+ * zero. Therefore, the hash version mod 4 should never be 0.
+ * Sincerely, the paranoia department.
+ */
+struct ext2_dx_root_info {
+ uint32_t reserved_zero;
+ uint8_t hash_version; /* 0 now, 1 at release */
+ uint8_t info_length; /* 8 */
+ uint8_t indirect_levels;
+ uint8_t unused_flags;
+};
+
+#define EXT2_HASH_LEGACY 0
+#define EXT2_HASH_HALF_MD4 1
+#define EXT2_HASH_TEA 2
+
+#define EXT2_HASH_FLAG_INCOMPAT 0x1
+
+struct ext2_dx_entry {
+ uint32_t hash;
+ uint32_t block;
+};
+
+struct ext2_dx_countlimit {
+ uint16_t limit;
+ uint16_t count;
+};
+
+
+/*
+ * Macro-instructions used to manage group descriptors
+ */
+#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group)
+#define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group)
+#define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s))
+/* limits imposed by 16-bit value gd_free_{blocks,inode}_count */
+#define EXT2_MAX_BLOCKS_PER_GROUP(s) ((1 << 16) - 8)
+#define EXT2_MAX_INODES_PER_GROUP(s) ((1 << 16) - EXT2_INODES_PER_BLOCK(s))
+#define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
+
+/*
+ * 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
+ */
+#define EXT2_SECRM_FL 0x00000001 /* Secure deletion */
+#define EXT2_UNRM_FL 0x00000002 /* Undelete */
+#define EXT2_COMPR_FL 0x00000004 /* Compress file */
+#define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */
+#define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */
+#define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */
+#define EXT2_NODUMP_FL 0x00000040 /* do not dump file */
+#define EXT2_NOATIME_FL 0x00000080 /* do not update atime */
+/* Reserved for compression usage... */
+#define EXT2_DIRTY_FL 0x00000100
+#define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
+#define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */
+#define EXT2_ECOMPR_FL 0x00000800 /* Compression error */
+/* End compression flags --- maybe not all used */
+#define EXT2_BTREE_FL 0x00001000 /* btree format dir */
+#define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */
+#define EXT2_IMAGIC_FL 0x00002000
+#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
+#define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */
+#define EXT2_DIRSYNC_FL 0x00010000 /* Synchronous directory modifications */
+#define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
+#define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */
+#define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
+
+#define EXT2_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
+#define EXT2_FL_USER_MODIFIABLE 0x000080FF /* User modifiable flags */
+
+/*
+ * ioctl commands
+ */
+#define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
+#define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
+#define EXT2_IOC_GETVERSION _IOR('v', 1, long)
+#define EXT2_IOC_SETVERSION _IOW('v', 2, long)
+
+/*
+ * Structure of an inode on the disk
+ */
+struct ext2_inode {
+ uint16_t i_mode; /* File mode */
+ uint16_t i_uid; /* Low 16 bits of Owner Uid */
+ uint32_t i_size; /* Size in bytes */
+ uint32_t i_atime; /* Access time */
+ uint32_t i_ctime; /* Creation time */
+ uint32_t i_mtime; /* Modification time */
+ uint32_t i_dtime; /* Deletion Time */
+ uint16_t i_gid; /* Low 16 bits of Group Id */
+ uint16_t i_links_count; /* Links count */
+ uint32_t i_blocks; /* Blocks count */
+ uint32_t i_flags; /* File flags */
+ union {
+ struct {
+ uint32_t l_i_reserved1;
+ } linux1;
+ struct {
+ uint32_t h_i_translator;
+ } hurd1;
+ struct {
+ uint32_t m_i_reserved1;
+ } masix1;
+ } osd1; /* OS dependent 1 */
+ uint32_t i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
+ uint32_t i_generation; /* File version (for NFS) */
+ uint32_t i_file_acl; /* File ACL */
+ uint32_t i_dir_acl; /* Directory ACL */
+ uint32_t i_faddr; /* Fragment address */
+ union {
+ struct {
+ uint8_t l_i_frag; /* Fragment number */
+ uint8_t l_i_fsize; /* Fragment size */
+ uint16_t i_pad1;
+ uint16_t l_i_uid_high; /* these 2 fields */
+ uint16_t l_i_gid_high; /* were reserved2[0] */
+ uint32_t l_i_reserved2;
+ } linux2;
+ struct {
+ uint8_t h_i_frag; /* Fragment number */
+ uint8_t h_i_fsize; /* Fragment size */
+ uint16_t h_i_mode_high;
+ uint16_t h_i_uid_high;
+ uint16_t h_i_gid_high;
+ uint32_t h_i_author;
+ } hurd2;
+ struct {
+ uint8_t m_i_frag; /* Fragment number */
+ uint8_t m_i_fsize; /* Fragment size */
+ uint16_t m_pad1;
+ uint32_t m_i_reserved2[2];
+ } masix2;
+ } osd2; /* OS dependent 2 */
+};
+
+/*
+ * Permanent part of an large inode on the disk
+ */
+struct ext2_inode_large {
+ uint16_t i_mode; /* File mode */
+ uint16_t i_uid; /* Low 16 bits of Owner Uid */
+ uint32_t i_size; /* Size in bytes */
+ uint32_t i_atime; /* Access time */
+ uint32_t i_ctime; /* Creation time */
+ uint32_t i_mtime; /* Modification time */
+ uint32_t i_dtime; /* Deletion Time */
+ uint16_t i_gid; /* Low 16 bits of Group Id */
+ uint16_t i_links_count; /* Links count */
+ uint32_t i_blocks; /* Blocks count */
+ uint32_t i_flags; /* File flags */
+ union {
+ struct {
+ uint32_t l_i_reserved1;
+ } linux1;
+ struct {
+ uint32_t h_i_translator;
+ } hurd1;
+ struct {
+ uint32_t m_i_reserved1;
+ } masix1;
+ } osd1; /* OS dependent 1 */
+ uint32_t i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
+ uint32_t i_generation; /* File version (for NFS) */
+ uint32_t i_file_acl; /* File ACL */
+ uint32_t i_dir_acl; /* Directory ACL */
+ uint32_t i_faddr; /* Fragment address */
+ union {
+ struct {
+ uint8_t l_i_frag; /* Fragment number */
+ uint8_t l_i_fsize; /* Fragment size */
+ uint16_t i_pad1;
+ uint16_t l_i_uid_high; /* these 2 fields */
+ uint16_t l_i_gid_high; /* were reserved2[0] */
+ uint32_t l_i_reserved2;
+ } linux2;
+ struct {
+ uint8_t h_i_frag; /* Fragment number */
+ uint8_t h_i_fsize; /* Fragment size */
+ uint16_t h_i_mode_high;
+ uint16_t h_i_uid_high;
+ uint16_t h_i_gid_high;
+ uint32_t h_i_author;
+ } hurd2;
+ struct {
+ uint8_t m_i_frag; /* Fragment number */
+ uint8_t m_i_fsize; /* Fragment size */
+ uint16_t m_pad1;
+ uint32_t m_i_reserved2[2];
+ } masix2;
+ } osd2; /* OS dependent 2 */
+ uint16_t i_extra_isize;
+ uint16_t i_pad1;
+};
+
+#define i_size_high i_dir_acl
+
+/*
+ * File system states
+ */
+#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
+#define EXT2_ERROR_FS 0x0002 /* Errors detected */
+
+/*
+ * Mount flags
+ */
+#define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */
+#define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
+#define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
+#define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
+#define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
+#define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
+#define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
+#define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */
+
+#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 {
+ uint32_t s_inodes_count; /* Inodes count */
+ uint32_t s_blocks_count; /* Blocks count */
+ uint32_t s_r_blocks_count; /* Reserved blocks count */
+ uint32_t s_free_blocks_count; /* Free blocks count */
+ uint32_t s_free_inodes_count; /* Free inodes count */
+ uint32_t s_first_data_block; /* First Data Block */
+ uint32_t s_log_block_size; /* Block size */
+ int32_t s_log_frag_size; /* Fragment size */
+ uint32_t s_blocks_per_group; /* # Blocks per group */
+ uint32_t s_frags_per_group; /* # Fragments per group */
+ uint32_t s_inodes_per_group; /* # Inodes per group */
+ uint32_t s_mtime; /* Mount time */
+ uint32_t s_wtime; /* Write time */
+ uint16_t s_mnt_count; /* Mount count */
+ int16_t s_max_mnt_count; /* Maximal mount count */
+ uint16_t s_magic; /* Magic signature */
+ uint16_t s_state; /* File system state */
+ uint16_t s_errors; /* Behaviour when detecting errors */
+ uint16_t s_minor_rev_level; /* minor revision level */
+ uint32_t s_lastcheck; /* time of last check */
+ uint32_t s_checkinterval; /* max. time between checks */
+ uint32_t s_creator_os; /* OS */
+ uint32_t s_rev_level; /* Revision level */
+ uint16_t s_def_resuid; /* Default uid for reserved blocks */
+ uint16_t 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...
+ */
+ uint32_t s_first_ino; /* First non-reserved inode */
+ uint16_t s_inode_size; /* size of inode structure */
+ uint16_t s_block_group_nr; /* block group # of this superblock */
+ uint32_t s_feature_compat; /* compatible feature set */
+ uint32_t s_feature_incompat; /* incompatible feature set */
+ uint32_t s_feature_ro_compat; /* readonly-compatible feature set */
+ uint8_t s_uuid[16]; /* 128-bit uuid for volume */
+ char s_volume_name[16]; /* volume name */
+ char s_last_mounted[64]; /* directory where last mounted */
+ uint32_t s_algorithm_usage_bitmap; /* For compression */
+ /*
+ * Performance hints. Directory preallocation should only
+ * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on.
+ */
+ uint8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
+ uint8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
+ uint16_t s_reserved_gdt_blocks; /* Per group table for online growth */
+ /*
+ * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set.
+ */
+ uint8_t s_journal_uuid[16]; /* uuid of journal superblock */
+ uint32_t s_journal_inum; /* inode number of journal file */
+ uint32_t s_journal_dev; /* device number of journal file */
+ uint32_t s_last_orphan; /* start of list of inodes to delete */
+ uint32_t s_hash_seed[4]; /* HTREE hash seed */
+ uint8_t s_def_hash_version; /* Default hash version to use */
+ uint8_t s_jnl_backup_type; /* Default type of journal backup */
+ uint16_t s_reserved_word_pad;
+ uint32_t s_default_mount_opts;
+ uint32_t s_first_meta_bg; /* First metablock group */
+ uint32_t s_mkfs_time; /* When the filesystem was created */
+ uint32_t s_jnl_blocks[17]; /* Backup of the journal inode */
+ uint32_t s_reserved[172]; /* 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
+
+/*
+ * Journal inode backup types
+ */
+#define EXT3_JNL_BACKUP_BLOCKS 1
+
+/*
+ * Feature set definitions
+ */
+
+#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
+ ( EXT2_SB(sb)->s_feature_compat & (mask) )
+#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
+ ( EXT2_SB(sb)->s_feature_ro_compat & (mask) )
+#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
+ ( EXT2_SB(sb)->s_feature_incompat & (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_RO_COMPAT_SPARSE_SUPER 0x0001
+#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
+/* #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 not used */
+
+#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
+#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
+#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
+#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
+#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
+#define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040
+
+
+#define EXT2_FEATURE_COMPAT_SUPP 0
+#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE)
+#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
+ EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
+ EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
+
+/*
+ * 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
+#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 {
+ uint32_t inode; /* Inode number */
+ uint16_t rec_len; /* Directory entry length */
+ uint16_t 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 {
+ uint32_t inode; /* Inode number */
+ uint16_t rec_len; /* Directory entry length */
+ uint8_t name_len; /* Name length */
+ uint8_t 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.
+ */
+#define EXT2_FT_UNKNOWN 0
+#define EXT2_FT_REG_FILE 1
+#define EXT2_FT_DIR 2
+#define EXT2_FT_CHRDEV 3
+#define EXT2_FT_BLKDEV 4
+#define EXT2_FT_FIFO 5
+#define EXT2_FT_SOCK 6
+#define EXT2_FT_SYMLINK 7
+
+#define EXT2_FT_MAX 8
+
+/*
+ * 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)
+
+#endif
+++ /dev/null
-/*
- * Work around linux/ext2_fs.h breakage.
- * linux/ext2_fs.h might be removed from future kernel header distribution.
- * See https://bugzilla.kernel.org/show_bug.cgi?id=42986
- *
- * Licensed under GPLv2, see file LICENSE in this source tree.
- */
-#ifndef BB_LINUX_EXT2_FS_H
-#define BB_LINUX_EXT2_FS_H
-
-/*
- * From linux/magic.h
- */
-
-#define EXT2_SUPER_MAGIC 0xEF53
-#define EXT3_SUPER_MAGIC 0xEF53
-#define EXT4_SUPER_MAGIC 0xEF53
-
-/*
- * From linux/ext2_fs.h, with minor changes.
- */
-
-/*
- * 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
- */
-
-/*
- * The second extended filesystem constants/structures
- */
-
-/*
- * 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
-
-/*
- * 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 (uint32_t))
-# 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
-{
- uint32_t bg_block_bitmap; /* Blocks bitmap block */
- uint32_t bg_inode_bitmap; /* Inodes bitmap block */
- uint32_t bg_inode_table; /* Inodes table block */
- uint16_t bg_free_blocks_count; /* Free blocks count */
- uint16_t bg_free_inodes_count; /* Free inodes count */
- uint16_t bg_used_dirs_count; /* Directories count */
- uint16_t bg_pad;
- uint32_t 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 uint32_t ext2_mask_flags(mode_t mode, uint32_t 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 {
- uint16_t i_mode; /* File mode */
- uint16_t i_uid; /* Low 16 bits of Owner Uid */
- uint32_t i_size; /* Size in bytes */
- uint32_t i_atime; /* Access time */
- uint32_t i_ctime; /* Creation time */
- uint32_t i_mtime; /* Modification time */
- uint32_t i_dtime; /* Deletion Time */
- uint16_t i_gid; /* Low 16 bits of Group Id */
- uint16_t i_links_count; /* Links count */
- uint32_t i_blocks; /* Blocks count */
- uint32_t i_flags; /* File flags */
- union {
- struct {
- uint32_t l_i_reserved1;
- } linux1;
- struct {
- uint32_t h_i_translator;
- } hurd1;
- struct {
- uint32_t m_i_reserved1;
- } masix1;
- } osd1; /* OS dependent 1 */
- uint32_t i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
- uint32_t i_generation; /* File version (for NFS) */
- uint32_t i_file_acl; /* File ACL */
- uint32_t i_dir_acl; /* Directory ACL */
- uint32_t i_faddr; /* Fragment address */
- union {
- struct {
- uint8_t l_i_frag; /* Fragment number */
- uint8_t l_i_fsize; /* Fragment size */
- uint16_t i_pad1;
- uint16_t l_i_uid_high; /* these 2 fields */
- uint16_t l_i_gid_high; /* were reserved2[0] */
- uint32_t l_i_reserved2;
- } linux2;
- struct {
- uint8_t h_i_frag; /* Fragment number */
- uint8_t h_i_fsize; /* Fragment size */
- uint16_t h_i_mode_high;
- uint16_t h_i_uid_high;
- uint16_t h_i_gid_high;
- uint32_t h_i_author;
- } hurd2;
- struct {
- uint8_t m_i_frag; /* Fragment number */
- uint8_t m_i_fsize; /* Fragment size */
- uint16_t m_pad1;
- uint32_t 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 {
- uint32_t s_inodes_count; /* Inodes count */
- uint32_t s_blocks_count; /* Blocks count */
- uint32_t s_r_blocks_count; /* Reserved blocks count */
- uint32_t s_free_blocks_count; /* Free blocks count */
- uint32_t s_free_inodes_count; /* Free inodes count */
- uint32_t s_first_data_block; /* First Data Block */
- uint32_t s_log_block_size; /* Block size */
- uint32_t s_log_frag_size; /* Fragment size */
- uint32_t s_blocks_per_group; /* # Blocks per group */
- uint32_t s_frags_per_group; /* # Fragments per group */
- uint32_t s_inodes_per_group; /* # Inodes per group */
- uint32_t s_mtime; /* Mount time */
- uint32_t s_wtime; /* Write time */
- uint16_t s_mnt_count; /* Mount count */
- uint16_t s_max_mnt_count; /* Maximal mount count */
- uint16_t s_magic; /* Magic signature */
- uint16_t s_state; /* File system state */
- uint16_t s_errors; /* Behaviour when detecting errors */
- uint16_t s_minor_rev_level; /* minor revision level */
- uint32_t s_lastcheck; /* time of last check */
- uint32_t s_checkinterval; /* max. time between checks */
- uint32_t s_creator_os; /* OS */
- uint32_t s_rev_level; /* Revision level */
- uint16_t s_def_resuid; /* Default uid for reserved blocks */
- uint16_t 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...
- */
- uint32_t s_first_ino; /* First non-reserved inode */
- uint16_t s_inode_size; /* size of inode structure */
- uint16_t s_block_group_nr; /* block group # of this superblock */
- uint32_t s_feature_compat; /* compatible feature set */
- uint32_t s_feature_incompat; /* incompatible feature set */
- uint32_t s_feature_ro_compat; /* readonly-compatible feature set */
- uint8_t s_uuid[16]; /* 128-bit uuid for volume */
- char s_volume_name[16]; /* volume name */
- char s_last_mounted[64]; /* directory where last mounted */
- uint32_t s_algorithm_usage_bitmap; /* For compression */
- /*
- * Performance hints. Directory preallocation should only
- * happen if the EXT2_COMPAT_PREALLOC flag is on.
- */
- uint8_t s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
- uint8_t s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
- uint16_t s_padding1;
- /*
- * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
- */
- uint8_t s_journal_uuid[16]; /* uuid of journal superblock */
- uint32_t s_journal_inum; /* inode number of journal file */
- uint32_t s_journal_dev; /* device number of journal file */
- uint32_t s_last_orphan; /* start of list of inodes to delete */
- uint32_t s_hash_seed[4]; /* HTREE hash seed */
- uint8_t s_def_hash_version; /* Default hash version to use */
- uint8_t s_reserved_char_pad;
- uint16_t s_reserved_word_pad;
- uint32_t s_default_mount_opts;
- uint32_t s_first_meta_bg; /* First metablock block group */
- uint32_t 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 {
- uint32_t inode; /* Inode number */
- uint16_t rec_len; /* Directory entry length */
- uint16_t 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 {
- uint32_t inode; /* Inode number */
- uint16_t rec_len; /* Directory entry length */
- uint8_t name_len; /* Name length */
- uint8_t 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 = 0,
- EXT2_FT_REG_FILE = 1,
- EXT2_FT_DIR = 2,
- EXT2_FT_CHRDEV = 3,
- EXT2_FT_BLKDEV = 4,
- EXT2_FT_FIFO = 5,
- EXT2_FT_SOCK = 6,
- EXT2_FT_SYMLINK = 7,
- 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
#include "libbb.h"
#include <linux/fs.h>
-#include "bb_linux_ext2_fs.h"
+#include "bb_e2fs_defs.h"
#define ENABLE_FEATURE_MKFS_EXT2_RESERVED_GDT 0
#define ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX 1
projects / oweals / busybox.git / commitdiff