ext3_fs.h

自己做的交叉编译工具！gcc-3.4.5,glibc-2.3.6在ubuntu8.04上做的面向kernel-2.6.28的交叉编译工具

#define EXT3_MOUNT_CHECK		0x00001	/* Do mount-time checks */
#define EXT3_MOUNT_OLDALLOC		0x00002  /* Don't use the new Orlov allocator */
#define EXT3_MOUNT_GRPID		0x00004	/* Create files with directory's group */
#define EXT3_MOUNT_DEBUG		0x00008	/* Some debugging messages */
#define EXT3_MOUNT_ERRORS_CONT		0x00010	/* Continue on errors */
#define EXT3_MOUNT_ERRORS_RO		0x00020	/* Remount fs ro on errors */
#define EXT3_MOUNT_ERRORS_PANIC		0x00040	/* Panic on errors */
#define EXT3_MOUNT_MINIX_DF		0x00080	/* Mimics the Minix statfs */
#define EXT3_MOUNT_NOLOAD		0x00100	/* Don't use existing journal*/
#define EXT3_MOUNT_ABORT		0x00200	/* Fatal error detected */
#define EXT3_MOUNT_DATA_FLAGS		0x00C00	/* Mode for data writes: */
#define EXT3_MOUNT_JOURNAL_DATA		0x00400	/* Write data to journal */
#define EXT3_MOUNT_ORDERED_DATA		0x00800	/* Flush data before commit */
#define EXT3_MOUNT_WRITEBACK_DATA	0x00C00	/* No data ordering */
#define EXT3_MOUNT_UPDATE_JOURNAL	0x01000	/* Update the journal format */
#define EXT3_MOUNT_NO_UID32		0x02000  /* Disable 32-bit UIDs */
#define EXT3_MOUNT_XATTR_USER		0x04000	/* Extended user attributes */
#define EXT3_MOUNT_POSIX_ACL		0x08000	/* POSIX Access Control Lists */
#define EXT3_MOUNT_RESERVATION		0x10000	/* Preallocation */
#define EXT3_MOUNT_BARRIER		0x20000 /* Use block barriers */
#define EXT3_MOUNT_NOBH			0x40000 /* No bufferheads */

/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
#ifndef _LINUX_EXT2_FS_H
#define clear_opt(o, opt)		o &= ~EXT3_MOUNT_##opt
#define set_opt(o, opt)			o |= EXT3_MOUNT_##opt
#define test_opt(sb, opt)		(EXT3_SB(sb)->s_mount_opt & \
					 EXT3_MOUNT_##opt)
#else
#define EXT2_MOUNT_NOLOAD		EXT3_MOUNT_NOLOAD
#define EXT2_MOUNT_ABORT		EXT3_MOUNT_ABORT
#define EXT2_MOUNT_DATA_FLAGS		EXT3_MOUNT_DATA_FLAGS
#endif

#define ext3_set_bit			ext2_set_bit
#define ext3_set_bit_atomic		ext2_set_bit_atomic
#define ext3_clear_bit			ext2_clear_bit
#define ext3_clear_bit_atomic		ext2_clear_bit_atomic
#define ext3_test_bit			ext2_test_bit
#define ext3_find_first_zero_bit	ext2_find_first_zero_bit
#define ext3_find_next_zero_bit		ext2_find_next_zero_bit

/*
 * Maximal mount counts between two filesystem checks
 */
#define EXT3_DFL_MAX_MNT_COUNT		20	/* Allow 20 mounts */
#define EXT3_DFL_CHECKINTERVAL		0	/* Don't use interval check */

/*
 * Behaviour when detecting errors
 */
#define EXT3_ERRORS_CONTINUE		1	/* Continue execution */
#define EXT3_ERRORS_RO			2	/* Remount fs read-only */
#define EXT3_ERRORS_PANIC		3	/* Panic */
#define EXT3_ERRORS_DEFAULT		EXT3_ERRORS_CONTINUE

/*
 * Structure of the super block
 */
struct ext3_super_block {
/*00*/	__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 */
/*10*/	__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 */
/*20*/	__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 */
/*30*/	__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 */
/*40*/	__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 */
/*50*/	__le16	s_def_resuid;		/* Default uid for reserved blocks */
	__le16	s_def_resgid;		/* Default gid for reserved blocks */
	/*
	 * These fields are for EXT3_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 */
/*60*/	__le32	s_feature_incompat;	/* incompatible feature set */
	__le32	s_feature_ro_compat;	/* readonly-compatible feature set */
/*68*/	__u8	s_uuid[16];		/* 128-bit uuid for volume */
/*78*/	char	s_volume_name[16];	/* volume name */
/*88*/	char	s_last_mounted[64];	/* directory where last mounted */
/*C8*/	__le32	s_algorithm_usage_bitmap; /* For compression */
	/*
	 * Performance hints.  Directory preallocation should only
	 * happen if the EXT3_FEATURE_COMPAT_DIR_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_reserved_gdt_blocks;	/* Per group desc for online growth */
	/*
	 * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
	 */
/*D0*/	__u8	s_journal_uuid[16];	/* uuid of journal superblock */
/*E0*/	__le32	s_journal_inum;		/* inode number of journal file */
	__le32	s_journal_dev;		/* device number of journal file */
	__le32	s_last_orphan;		/* start of list of inodes to delete */
	__le32	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 */
};

/* Assume that user mode programs are passing in an ext3fs superblock, not
 * a kernel struct super_block.  This will allow us to call the feature-test
 * macros from user land. */
#define EXT3_SB(sb)	(sb)

#define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime

/*
 * Codes for operating systems
 */
#define EXT3_OS_LINUX		0
#define EXT3_OS_HURD		1
#define EXT3_OS_MASIX		2
#define EXT3_OS_FREEBSD		3
#define EXT3_OS_LITES		4

/*
 * Revision levels
 */
#define EXT3_GOOD_OLD_REV	0	/* The good old (original) format */
#define EXT3_DYNAMIC_REV	1	/* V2 format w/ dynamic inode sizes */

#define EXT3_CURRENT_REV	EXT3_GOOD_OLD_REV
#define EXT3_MAX_SUPP_REV	EXT3_DYNAMIC_REV

#define EXT3_GOOD_OLD_INODE_SIZE 128

/*
 * Feature set definitions
 */

#define EXT3_HAS_COMPAT_FEATURE(sb,mask)			\
	( EXT3_SB(sb)->s_es->s_feature_compat & __cpu_to_le32(mask) )
#define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask)			\
	( EXT3_SB(sb)->s_es->s_feature_ro_compat & __cpu_to_le32(mask) )
#define EXT3_HAS_INCOMPAT_FEATURE(sb,mask)			\
	( EXT3_SB(sb)->s_es->s_feature_incompat & __cpu_to_le32(mask) )
#define EXT3_SET_COMPAT_FEATURE(sb,mask)			\
	EXT3_SB(sb)->s_es->s_feature_compat |= __cpu_to_le32(mask)
#define EXT3_SET_RO_COMPAT_FEATURE(sb,mask)			\
	EXT3_SB(sb)->s_es->s_feature_ro_compat |= __cpu_to_le32(mask)
#define EXT3_SET_INCOMPAT_FEATURE(sb,mask)			\
	EXT3_SB(sb)->s_es->s_feature_incompat |= __cpu_to_le32(mask)
#define EXT3_CLEAR_COMPAT_FEATURE(sb,mask)			\
	EXT3_SB(sb)->s_es->s_feature_compat &= ~__cpu_to_le32(mask)
#define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask)			\
	EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~__cpu_to_le32(mask)
#define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask)			\
	EXT3_SB(sb)->s_es->s_feature_incompat &= ~__cpu_to_le32(mask)

#define EXT3_FEATURE_COMPAT_DIR_PREALLOC	0x0001
#define EXT3_FEATURE_COMPAT_IMAGIC_INODES	0x0002
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL		0x0004
#define EXT3_FEATURE_COMPAT_EXT_ATTR		0x0008
#define EXT3_FEATURE_COMPAT_RESIZE_INODE	0x0010
#define EXT3_FEATURE_COMPAT_DIR_INDEX		0x0020

#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER	0x0001
#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE	0x0002
#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR	0x0004

#define EXT3_FEATURE_INCOMPAT_COMPRESSION	0x0001
#define EXT3_FEATURE_INCOMPAT_FILETYPE		0x0002
#define EXT3_FEATURE_INCOMPAT_RECOVER		0x0004 /* Needs recovery */
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV	0x0008 /* Journal device */
#define EXT3_FEATURE_INCOMPAT_META_BG		0x0010

#define EXT3_FEATURE_COMPAT_SUPP	EXT2_FEATURE_COMPAT_EXT_ATTR
#define EXT3_FEATURE_INCOMPAT_SUPP	(EXT3_FEATURE_INCOMPAT_FILETYPE| \
					 EXT3_FEATURE_INCOMPAT_RECOVER| \
					 EXT3_FEATURE_INCOMPAT_META_BG)
#define EXT3_FEATURE_RO_COMPAT_SUPP	(EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
					 EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
					 EXT3_FEATURE_RO_COMPAT_BTREE_DIR)

/*
 * Default values for user and/or group using reserved blocks
 */
#define	EXT3_DEF_RESUID		0
#define	EXT3_DEF_RESGID		0

/*
 * Default mount options
 */
#define EXT3_DEFM_DEBUG		0x0001
#define EXT3_DEFM_BSDGROUPS	0x0002
#define EXT3_DEFM_XATTR_USER	0x0004
#define EXT3_DEFM_ACL		0x0008
#define EXT3_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 EXT3_NAME_LEN 255

struct ext3_dir_entry {
	__le32	inode;			/* Inode number */
	__le16	rec_len;		/* Directory entry length */
	__le16	name_len;		/* Name length */
	char	name[EXT3_NAME_LEN];	/* File name */
};

/*
 * The new version of the directory entry.  Since EXT3 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 ext3_dir_entry_2 {
	__le32	inode;			/* Inode number */
	__le16	rec_len;		/* Directory entry length */
	__u8	name_len;		/* Name length */
	__u8	file_type;
	char	name[EXT3_NAME_LEN];	/* File name */
};

/*
 * Ext3 directory file types.  Only the low 3 bits are used.  The
 * other bits are reserved for now.
 */
#define EXT3_FT_UNKNOWN		0
#define EXT3_FT_REG_FILE	1
#define EXT3_FT_DIR		2
#define EXT3_FT_CHRDEV		3
#define EXT3_FT_BLKDEV		4
#define EXT3_FT_FIFO		5
#define EXT3_FT_SOCK		6
#define EXT3_FT_SYMLINK		7

#define EXT3_FT_MAX		8

/*
 * EXT3_DIR_PAD defines the directory entries boundaries
 *
 * NOTE: It must be a multiple of 4
 */
#define EXT3_DIR_PAD			4
#define EXT3_DIR_ROUND			(EXT3_DIR_PAD - 1)
#define EXT3_DIR_REC_LEN(name_len)	(((name_len) + 8 + EXT3_DIR_ROUND) & \
					 ~EXT3_DIR_ROUND)
/*
 * Hash Tree Directory indexing
 * (c) Daniel Phillips, 2001
 */

#ifdef CONFIG_EXT3_INDEX
  #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \
					      EXT3_FEATURE_COMPAT_DIR_INDEX) && \
		      (EXT3_I(dir)->i_flags & EXT3_INDEX_FL))
#define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX)
#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
#else
  #define is_dx(dir) 0
#define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX)
#define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
#endif

/* Legal values for the dx_root hash_version field: */

#define DX_HASH_LEGACY		0
#define DX_HASH_HALF_MD4	1
#define DX_HASH_TEA		2

/* hash info structure used by the directory hash */
struct dx_hash_info
{
	__u32		hash;
	__u32		minor_hash;
	__s32		hash_version;
	__u32		*seed;
};

#define EXT3_HTREE_EOF	0x7fffffff

#endif	/* _LINUX_EXT3_FS_H */