include/linux/gfs2_ondisk.h - kernel/msm-5.4 - Gitiles

 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
  *
  * This copyrighted material is made available to anyone wishing to use,
  * modify, copy, or redistribute it subject to the terms and conditions
  * of the GNU General Public License v.2.
  */

 #ifndef __GFS2_ONDISK_DOT_H__
 #define __GFS2_ONDISK_DOT_H__

 #define GFS2_MAGIC		0x01161970
 #define GFS2_BASIC_BLOCK	512
 #define GFS2_BASIC_BLOCK_SHIFT	9

 /* Lock numbers of the LM_TYPE_NONDISK type */

 #define GFS2_MOUNT_LOCK		0
 #define GFS2_LIVE_LOCK		1
 #define GFS2_TRANS_LOCK		2
 #define GFS2_RENAME_LOCK	3

 /* Format numbers for various metadata types */

 #define GFS2_FORMAT_NONE	0
 #define GFS2_FORMAT_SB		100
 #define GFS2_FORMAT_RG		200
 #define GFS2_FORMAT_RB		300
 #define GFS2_FORMAT_DI		400
 #define GFS2_FORMAT_IN		500
 #define GFS2_FORMAT_LF		600
 #define GFS2_FORMAT_JD		700
 #define GFS2_FORMAT_LH		800
 #define GFS2_FORMAT_LD		900
 #define GFS2_FORMAT_LB		1000
 #define GFS2_FORMAT_EA		1100
 #define GFS2_FORMAT_ED		1200
 #define GFS2_FORMAT_UT		1300
 #define GFS2_FORMAT_QC		1400
 /* These are format numbers for entities contained in files */
 #define GFS2_FORMAT_RI		1500
 #define GFS2_FORMAT_DE		1600
 #define GFS2_FORMAT_QU		1700
 /* These are part of the superblock */
 #define GFS2_FORMAT_FS		1801
 #define GFS2_FORMAT_MULTI	1900

 /*
  * An on-disk inode number
  */

 #define gfs2_inum_equal(ino1, ino2) \
 	(((ino1)->no_formal_ino == (ino2)->no_formal_ino) && \
 	((ino1)->no_addr == (ino2)->no_addr))

 struct gfs2_inum {
 	__be64 no_formal_ino;
 	__be64 no_addr;
 };

 /*
  * Generic metadata head structure
  * Every inplace buffer logged in the journal must start with this.
  */

 #define GFS2_METATYPE_NONE	0
 #define GFS2_METATYPE_SB	1
 #define GFS2_METATYPE_RG	2
 #define GFS2_METATYPE_RB	3
 #define GFS2_METATYPE_DI	4
 #define GFS2_METATYPE_IN	5
 #define GFS2_METATYPE_LF	6
 #define GFS2_METATYPE_JD	7
 #define GFS2_METATYPE_LH	8
 #define GFS2_METATYPE_LD	9
 #define GFS2_METATYPE_LB	10
 #define GFS2_METATYPE_EA	11
 #define GFS2_METATYPE_ED	12
 #define GFS2_METATYPE_UT	13
 #define GFS2_METATYPE_QC	14

 struct gfs2_meta_header {
 	__be32 mh_magic;
 	__be32 mh_type;
 	__be64 __pad0;		/* Was generation number in gfs1 */
 	__be32 mh_format;
 	__be32 __pad1;		/* Was incarnation number in gfs1 */
 };

 /*
  * super-block structure
  *
  * It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes)
  *
  * Order is important, need to be able to read old superblocks to do on-disk
  * version upgrades.
  */

 /* Address of superblock in GFS2 basic blocks */
 #define GFS2_SB_ADDR		128

 /* The lock number for the superblock (must be zero) */
 #define GFS2_SB_LOCK		0

 /* Requirement:  GFS2_LOCKNAME_LEN % 8 == 0
    Includes: the fencing zero at the end */
 #define GFS2_LOCKNAME_LEN	64

 struct gfs2_sb {
 	struct gfs2_meta_header sb_header;

 	__be32 sb_fs_format;
 	__be32 sb_multihost_format;
 	__u32  __pad0;	/* Was superblock flags in gfs1 */

 	__be32 sb_bsize;
 	__be32 sb_bsize_shift;
 	__u32 __pad1;	/* Was journal segment size in gfs1 */

 	struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */
 	struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */
 	struct gfs2_inum sb_root_dir;

 	char sb_lockproto[GFS2_LOCKNAME_LEN];
 	char sb_locktable[GFS2_LOCKNAME_LEN];
 	/* In gfs1, quota and license dinodes followed */
 };

 /*
  * resource index structure
  */

 struct gfs2_rindex {
 	__be64 ri_addr;	/* grp block disk address */
 	__be32 ri_length;	/* length of rgrp header in fs blocks */
 	__u32 __pad;

 	__be64 ri_data0;	/* first data location */
 	__be32 ri_data;	/* num of data blocks in rgrp */

 	__be32 ri_bitbytes;	/* number of bytes in data bitmaps */

 	__u8 ri_reserved[64];
 };

 /*
  * resource group header structure
  */

 /* Number of blocks per byte in rgrp */
 #define GFS2_NBBY		4
 #define GFS2_BIT_SIZE		2
 #define GFS2_BIT_MASK		0x00000003

 #define GFS2_BLKST_FREE		0
 #define GFS2_BLKST_USED		1
 #define GFS2_BLKST_INVALID	2
 #define GFS2_BLKST_DINODE	3

 #define GFS2_RGF_JOURNAL	0x00000001
 #define GFS2_RGF_METAONLY	0x00000002
 #define GFS2_RGF_DATAONLY	0x00000004
 #define GFS2_RGF_NOALLOC	0x00000008

 struct gfs2_rgrp {
 	struct gfs2_meta_header rg_header;

 	__be32 rg_flags;
 	__be32 rg_free;
 	__be32 rg_dinodes;

 	__u8 rg_reserved[92]; /* Several fields from gfs1 now reserved */
 };

 /*
  * quota structure
  */

 struct gfs2_quota {
 	__be64 qu_limit;
 	__be64 qu_warn;
 	__be64 qu_value;
 };

 /*
  * dinode structure
  */

 #define GFS2_MAX_META_HEIGHT	10
 #define GFS2_DIR_MAX_DEPTH	17

 #define DT2IF(dt) (((dt) << 12) & S_IFMT)
 #define IF2DT(sif) (((sif) & S_IFMT) >> 12)

 /* Dinode flags */
 #define GFS2_DIF_JDATA			0x00000001
 #define GFS2_DIF_EXHASH			0x00000002
 #define GFS2_DIF_UNUSED			0x00000004  /* only in gfs1 */
 #define GFS2_DIF_EA_INDIRECT		0x00000008
 #define GFS2_DIF_DIRECTIO		0x00000010
 #define GFS2_DIF_IMMUTABLE		0x00000020
 #define GFS2_DIF_APPENDONLY		0x00000040
 #define GFS2_DIF_NOATIME		0x00000080
 #define GFS2_DIF_SYNC			0x00000100
 #define GFS2_DIF_SYSTEM			0x00000200 /* New in gfs2 */
 #define GFS2_DIF_TRUNC_IN_PROG		0x20000000 /* New in gfs2 */
 #define GFS2_DIF_INHERIT_DIRECTIO	0x40000000
 #define GFS2_DIF_INHERIT_JDATA		0x80000000

 struct gfs2_dinode {
 	struct gfs2_meta_header di_header;

 	struct gfs2_inum di_num;

 	__be32 di_mode;	/* mode of file */
 	__be32 di_uid;	/* owner's user id */
 	__be32 di_gid;	/* owner's group id */
 	__be32 di_nlink;	/* number of links to this file */
 	__be64 di_size;	/* number of bytes in file */
 	__be64 di_blocks;	/* number of blocks in file */
 	__be64 di_atime;	/* time last accessed */
 	__be64 di_mtime;	/* time last modified */
 	__be64 di_ctime;	/* time last changed */
 	__be32 di_major;	/* device major number */
 	__be32 di_minor;	/* device minor number */

 	/* This section varies from gfs1. Padding added to align with
          * remainder of dinode
 	 */
 	__be64 di_goal_meta;	/* rgrp to alloc from next */
 	__be64 di_goal_data;	/* data block goal */
 	__u32 __pad[2];

 	__be32 di_flags;	/* GFS2_DIF_... */
 	__be32 di_payload_format;  /* GFS2_FORMAT_... */
 	__u16 __pad1;	/* Was ditype in gfs1 */
 	__be16 di_height;	/* height of metadata */
 	__u32 __pad2;	/* Unused incarnation number from gfs1 */

 	/* These only apply to directories  */
 	__u16 __pad3;	/* Padding */
 	__be16 di_depth;	/* Number of bits in the table */
 	__be32 di_entries;	/* The number of entries in the directory */

 	struct gfs2_inum __pad4; /* Unused even in current gfs1 */

 	__be64 di_eattr;	/* extended attribute block number */

 	__u8 di_reserved[56];
 };

 /*
  * directory structure - many of these per directory file
  */

 #define GFS2_FNAMESIZE		255
 #define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)

 struct gfs2_dirent {
 	struct gfs2_inum de_inum;
 	__be32 de_hash;
 	__be32 de_rec_len;
 	__u8 de_name_len;
 	__u8 de_type;
 	__u16 __pad1;
 	__u32 __pad2;
 };

 /*
  * Header of leaf directory nodes
  */

 struct gfs2_leaf {
 	struct gfs2_meta_header lf_header;

 	__be16 lf_depth;		/* Depth of leaf */
 	__be16 lf_entries;		/* Number of dirents in leaf */
 	__be32 lf_dirent_format;	/* Format of the dirents */
 	__be64 lf_next;			/* Next leaf, if overflow */

 	__u8 lf_reserved[32];
 };

 /*
  * Extended attribute header format
  */

 #define GFS2_EA_MAX_NAME_LEN	255
 #define GFS2_EA_MAX_DATA_LEN	65536

 #define GFS2_EATYPE_UNUSED	0
 #define GFS2_EATYPE_USR		1
 #define GFS2_EATYPE_SYS		2

 #define GFS2_EATYPE_LAST	2
 #define GFS2_EATYPE_VALID(x)	((x) <= GFS2_EATYPE_LAST)

 #define GFS2_EAFLAG_LAST	0x01	/* last ea in block */

 struct gfs2_ea_header {
 	__be32 ea_rec_len;
 	__be32 ea_data_len;
 	__u8 ea_name_len;	/* no NULL pointer after the string */
 	__u8 ea_type;		/* GFS2_EATYPE_... */
 	__u8 ea_flags;		/* GFS2_EAFLAG_... */
 	__u8 ea_num_ptrs;
 	__u32 __pad;
 };

 /*
  * Log header structure
  */

 #define GFS2_LOG_HEAD_UNMOUNT	0x00000001	/* log is clean */

 struct gfs2_log_header {
 	struct gfs2_meta_header lh_header;

 	__be64 lh_sequence;	/* Sequence number of this transaction */
 	__be32 lh_flags;	/* GFS2_LOG_HEAD_... */
 	__be32 lh_tail;		/* Block number of log tail */
 	__be32 lh_blkno;
 	__be32 lh_hash;
 };

 /*
  * Log type descriptor
  */

 #define GFS2_LOG_DESC_METADATA	300
 /* ld_data1 is the number of metadata blocks in the descriptor.
    ld_data2 is unused. */

 #define GFS2_LOG_DESC_REVOKE	301
 /* ld_data1 is the number of revoke blocks in the descriptor.
    ld_data2 is unused. */

 struct gfs2_log_descriptor {
 	struct gfs2_meta_header ld_header;

 	__be32 ld_type;		/* GFS2_LOG_DESC_... */
 	__be32 ld_length;	/* Number of buffers in this chunk */
 	__be32 ld_data1;	/* descriptor-specific field */
 	__be32 ld_data2;	/* descriptor-specific field */

 	__u8 ld_reserved[32];
 };

 /*
  * Inum Range
  * Describe a range of formal inode numbers allocated to
  * one machine to assign to inodes.
  */

 #define GFS2_INUM_QUANTUM	1048576

 struct gfs2_inum_range {
 	__be64 ir_start;
 	__be64 ir_length;
 };

 /*
  * Statfs change
  * Describes an change to the pool of free and allocated
  * blocks.
  */

 struct gfs2_statfs_change {
 	__be64 sc_total;
 	__be64 sc_free;
 	__be64 sc_dinodes;
 };

 /*
  * Unlinked Tag
  * Describes an allocated inode that isn't linked into
  * the directory tree and might need to be deallocated.
  */

 #define GFS2_UTF_UNINIT		0x00000001

 struct gfs2_unlinked_tag {
 	struct gfs2_inum ut_inum;
 	__be32 ut_flags;	/* GFS2_UTF_... */
 	__u32 __pad;
 };

 /*
  * Quota change
  * Describes an allocation change for a particular
  * user or group.
  */

 #define GFS2_QCF_USER		0x00000001

 struct gfs2_quota_change {
 	__be64 qc_change;
 	__be32 qc_flags;	/* GFS2_QCF_... */
 	__be32 qc_id;
 };

 /* Translation functions */

 extern void gfs2_inum_in(struct gfs2_inum *no, char *buf);
 extern void gfs2_inum_out(struct gfs2_inum *no, char *buf);
 extern void gfs2_sb_in(struct gfs2_sb *sb, char *buf);
 extern void gfs2_rindex_in(struct gfs2_rindex *ri, char *buf);
 extern void gfs2_rindex_out(struct gfs2_rindex *ri, char *buf);
 extern void gfs2_rgrp_in(struct gfs2_rgrp *rg, char *buf);
 extern void gfs2_rgrp_out(struct gfs2_rgrp *rg, char *buf);
 extern void gfs2_quota_in(struct gfs2_quota *qu, char *buf);
 extern void gfs2_quota_out(struct gfs2_quota *qu, char *buf);
 extern void gfs2_dinode_in(struct gfs2_dinode *di, char *buf);
 extern void gfs2_dinode_out(struct gfs2_dinode *di, char *buf);
 extern void gfs2_leaf_in(struct gfs2_leaf *lf, char *buf);
 extern void gfs2_ea_header_in(struct gfs2_ea_header *ea, char *buf);
 extern void gfs2_ea_header_out(struct gfs2_ea_header *ea, char *buf);
 extern void gfs2_log_header_in(struct gfs2_log_header *lh, char *buf);
 extern void gfs2_inum_range_in(struct gfs2_inum_range *ir, char *buf);
 extern void gfs2_inum_range_out(struct gfs2_inum_range *ir, char *buf);
 extern void gfs2_statfs_change_in(struct gfs2_statfs_change *sc, char *buf);
 extern void gfs2_statfs_change_out(struct gfs2_statfs_change *sc, char *buf);
 extern void gfs2_unlinked_tag_in(struct gfs2_unlinked_tag *ut, char *buf);
 extern void gfs2_unlinked_tag_out(struct gfs2_unlinked_tag *ut, char *buf);
 extern void gfs2_quota_change_in(struct gfs2_quota_change *qc, char *buf);

 /* Printing functions */

 extern void gfs2_inum_print(struct gfs2_inum *no);
 extern void gfs2_meta_header_print(struct gfs2_meta_header *mh);
 extern void gfs2_sb_print(struct gfs2_sb *sb);
 extern void gfs2_rindex_print(struct gfs2_rindex *ri);
 extern void gfs2_rgrp_print(struct gfs2_rgrp *rg);
 extern void gfs2_quota_print(struct gfs2_quota *qu);
 extern void gfs2_dinode_print(struct gfs2_dinode *di);
 extern void gfs2_dirent_print(struct gfs2_dirent *de, char *name);
 extern void gfs2_leaf_print(struct gfs2_leaf *lf);
 extern void gfs2_ea_header_print(struct gfs2_ea_header *ea, char *name);
 extern void gfs2_log_header_print(struct gfs2_log_header *lh);
 extern void gfs2_log_descriptor_print(struct gfs2_log_descriptor *ld);
 extern void gfs2_inum_range_print(struct gfs2_inum_range *ir);
 extern void gfs2_statfs_change_print(struct gfs2_statfs_change *sc);
 extern void gfs2_unlinked_tag_print(struct gfs2_unlinked_tag *ut);
 extern void gfs2_quota_change_print(struct gfs2_quota_change *qc);

 #endif /* __GFS2_ONDISK_DOT_H__ */
	/*
	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
	*
	* This copyrighted material is made available to anyone wishing to use,
	* modify, copy, or redistribute it subject to the terms and conditions
	* of the GNU General Public License v.2.
	*/

	#ifndef __GFS2_ONDISK_DOT_H__
	#define __GFS2_ONDISK_DOT_H__

	#define GFS2_MAGIC 0x01161970
	#define GFS2_BASIC_BLOCK 512
	#define GFS2_BASIC_BLOCK_SHIFT 9

	/* Lock numbers of the LM_TYPE_NONDISK type */

	#define GFS2_MOUNT_LOCK 0
	#define GFS2_LIVE_LOCK 1
	#define GFS2_TRANS_LOCK 2
	#define GFS2_RENAME_LOCK 3

	/* Format numbers for various metadata types */

	#define GFS2_FORMAT_NONE 0
	#define GFS2_FORMAT_SB 100
	#define GFS2_FORMAT_RG 200
	#define GFS2_FORMAT_RB 300
	#define GFS2_FORMAT_DI 400
	#define GFS2_FORMAT_IN 500
	#define GFS2_FORMAT_LF 600
	#define GFS2_FORMAT_JD 700
	#define GFS2_FORMAT_LH 800
	#define GFS2_FORMAT_LD 900
	#define GFS2_FORMAT_LB 1000
	#define GFS2_FORMAT_EA 1100
	#define GFS2_FORMAT_ED 1200
	#define GFS2_FORMAT_UT 1300
	#define GFS2_FORMAT_QC 1400
	/* These are format numbers for entities contained in files */
	#define GFS2_FORMAT_RI 1500
	#define GFS2_FORMAT_DE 1600
	#define GFS2_FORMAT_QU 1700
	/* These are part of the superblock */
	#define GFS2_FORMAT_FS 1801
	#define GFS2_FORMAT_MULTI 1900

	/*
	* An on-disk inode number
	*/

	#define gfs2_inum_equal(ino1, ino2) \
	(((ino1)->no_formal_ino == (ino2)->no_formal_ino) && \
	((ino1)->no_addr == (ino2)->no_addr))

	struct gfs2_inum {
	__be64 no_formal_ino;
	__be64 no_addr;
	};

	/*
	* Generic metadata head structure
	* Every inplace buffer logged in the journal must start with this.
	*/

	#define GFS2_METATYPE_NONE 0
	#define GFS2_METATYPE_SB 1
	#define GFS2_METATYPE_RG 2
	#define GFS2_METATYPE_RB 3
	#define GFS2_METATYPE_DI 4
	#define GFS2_METATYPE_IN 5
	#define GFS2_METATYPE_LF 6
	#define GFS2_METATYPE_JD 7
	#define GFS2_METATYPE_LH 8
	#define GFS2_METATYPE_LD 9
	#define GFS2_METATYPE_LB 10
	#define GFS2_METATYPE_EA 11
	#define GFS2_METATYPE_ED 12
	#define GFS2_METATYPE_UT 13
	#define GFS2_METATYPE_QC 14

	struct gfs2_meta_header {
	__be32 mh_magic;
	__be32 mh_type;
	__be64 __pad0; /* Was generation number in gfs1 */
	__be32 mh_format;
	__be32 __pad1; /* Was incarnation number in gfs1 */
	};

	/*
	* super-block structure
	*
	* It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes)
	*
	* Order is important, need to be able to read old superblocks to do on-disk
	* version upgrades.
	*/

	/* Address of superblock in GFS2 basic blocks */
	#define GFS2_SB_ADDR 128

	/* The lock number for the superblock (must be zero) */
	#define GFS2_SB_LOCK 0

	/* Requirement: GFS2_LOCKNAME_LEN % 8 == 0
	Includes: the fencing zero at the end */
	#define GFS2_LOCKNAME_LEN 64

	struct gfs2_sb {
	struct gfs2_meta_header sb_header;

	__be32 sb_fs_format;
	__be32 sb_multihost_format;
	__u32 __pad0; /* Was superblock flags in gfs1 */

	__be32 sb_bsize;
	__be32 sb_bsize_shift;
	__u32 __pad1; /* Was journal segment size in gfs1 */

	struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */
	struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */
	struct gfs2_inum sb_root_dir;

	char sb_lockproto[GFS2_LOCKNAME_LEN];
	char sb_locktable[GFS2_LOCKNAME_LEN];
	/* In gfs1, quota and license dinodes followed */
	};

	/*
	* resource index structure
	*/

	struct gfs2_rindex {
	__be64 ri_addr; /* grp block disk address */
	__be32 ri_length; /* length of rgrp header in fs blocks */
	__u32 __pad;

	__be64 ri_data0; /* first data location */
	__be32 ri_data; /* num of data blocks in rgrp */

	__be32 ri_bitbytes; /* number of bytes in data bitmaps */

	__u8 ri_reserved[64];
	};

	/*
	* resource group header structure
	*/

	/* Number of blocks per byte in rgrp */
	#define GFS2_NBBY 4
	#define GFS2_BIT_SIZE 2
	#define GFS2_BIT_MASK 0x00000003

	#define GFS2_BLKST_FREE 0
	#define GFS2_BLKST_USED 1
	#define GFS2_BLKST_INVALID 2
	#define GFS2_BLKST_DINODE 3

	#define GFS2_RGF_JOURNAL 0x00000001
	#define GFS2_RGF_METAONLY 0x00000002
	#define GFS2_RGF_DATAONLY 0x00000004
	#define GFS2_RGF_NOALLOC 0x00000008

	struct gfs2_rgrp {
	struct gfs2_meta_header rg_header;

	__be32 rg_flags;
	__be32 rg_free;
	__be32 rg_dinodes;

	__u8 rg_reserved[92]; /* Several fields from gfs1 now reserved */
	};

	/*
	* quota structure
	*/

	struct gfs2_quota {
	__be64 qu_limit;
	__be64 qu_warn;
	__be64 qu_value;
	};

	/*
	* dinode structure
	*/

	#define GFS2_MAX_META_HEIGHT 10
	#define GFS2_DIR_MAX_DEPTH 17

	#define DT2IF(dt) (((dt) << 12) & S_IFMT)
	#define IF2DT(sif) (((sif) & S_IFMT) >> 12)

	/* Dinode flags */
	#define GFS2_DIF_JDATA 0x00000001
	#define GFS2_DIF_EXHASH 0x00000002
	#define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
	#define GFS2_DIF_EA_INDIRECT 0x00000008
	#define GFS2_DIF_DIRECTIO 0x00000010
	#define GFS2_DIF_IMMUTABLE 0x00000020
	#define GFS2_DIF_APPENDONLY 0x00000040
	#define GFS2_DIF_NOATIME 0x00000080
	#define GFS2_DIF_SYNC 0x00000100
	#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
	#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
	#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
	#define GFS2_DIF_INHERIT_JDATA 0x80000000

	struct gfs2_dinode {
	struct gfs2_meta_header di_header;

	struct gfs2_inum di_num;

	__be32 di_mode; /* mode of file */
	__be32 di_uid; /* owner's user id */
	__be32 di_gid; /* owner's group id */
	__be32 di_nlink; /* number of links to this file */
	__be64 di_size; /* number of bytes in file */
	__be64 di_blocks; /* number of blocks in file */
	__be64 di_atime; /* time last accessed */
	__be64 di_mtime; /* time last modified */
	__be64 di_ctime; /* time last changed */
	__be32 di_major; /* device major number */
	__be32 di_minor; /* device minor number */

	/* This section varies from gfs1. Padding added to align with
	* remainder of dinode
	*/
	__be64 di_goal_meta; /* rgrp to alloc from next */
	__be64 di_goal_data; /* data block goal */
	__u32 __pad[2];

	__be32 di_flags; /* GFS2_DIF_... */
	__be32 di_payload_format; /* GFS2_FORMAT_... */
	__u16 __pad1; /* Was ditype in gfs1 */
	__be16 di_height; /* height of metadata */
	__u32 __pad2; /* Unused incarnation number from gfs1 */

	/* These only apply to directories */
	__u16 __pad3; /* Padding */
	__be16 di_depth; /* Number of bits in the table */
	__be32 di_entries; /* The number of entries in the directory */

	struct gfs2_inum __pad4; /* Unused even in current gfs1 */

	__be64 di_eattr; /* extended attribute block number */

	__u8 di_reserved[56];
	};

	/*
	* directory structure - many of these per directory file
	*/

	#define GFS2_FNAMESIZE 255
	#define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)

	struct gfs2_dirent {
	struct gfs2_inum de_inum;
	__be32 de_hash;
	__be32 de_rec_len;
	__u8 de_name_len;
	__u8 de_type;
	__u16 __pad1;
	__u32 __pad2;
	};

	/*
	* Header of leaf directory nodes
	*/

	struct gfs2_leaf {
	struct gfs2_meta_header lf_header;

	__be16 lf_depth; /* Depth of leaf */
	__be16 lf_entries; /* Number of dirents in leaf */
	__be32 lf_dirent_format; /* Format of the dirents */
	__be64 lf_next; /* Next leaf, if overflow */

	__u8 lf_reserved[32];
	};

	/*
	* Extended attribute header format
	*/

	#define GFS2_EA_MAX_NAME_LEN 255
	#define GFS2_EA_MAX_DATA_LEN 65536

	#define GFS2_EATYPE_UNUSED 0
	#define GFS2_EATYPE_USR 1
	#define GFS2_EATYPE_SYS 2

	#define GFS2_EATYPE_LAST 2
	#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)

	#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */

	struct gfs2_ea_header {
	__be32 ea_rec_len;
	__be32 ea_data_len;
	__u8 ea_name_len; /* no NULL pointer after the string */
	__u8 ea_type; /* GFS2_EATYPE_... */
	__u8 ea_flags; /* GFS2_EAFLAG_... */
	__u8 ea_num_ptrs;
	__u32 __pad;
	};

	/*
	* Log header structure
	*/

	#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */

	struct gfs2_log_header {
	struct gfs2_meta_header lh_header;

	__be64 lh_sequence; /* Sequence number of this transaction */
	__be32 lh_flags; /* GFS2_LOG_HEAD_... */
	__be32 lh_tail; /* Block number of log tail */
	__be32 lh_blkno;
	__be32 lh_hash;
	};

	/*
	* Log type descriptor
	*/

	#define GFS2_LOG_DESC_METADATA 300
	/* ld_data1 is the number of metadata blocks in the descriptor.
	ld_data2 is unused. */

	#define GFS2_LOG_DESC_REVOKE 301
	/* ld_data1 is the number of revoke blocks in the descriptor.
	ld_data2 is unused. */

	struct gfs2_log_descriptor {
	struct gfs2_meta_header ld_header;

	__be32 ld_type; /* GFS2_LOG_DESC_... */
	__be32 ld_length; /* Number of buffers in this chunk */
	__be32 ld_data1; /* descriptor-specific field */
	__be32 ld_data2; /* descriptor-specific field */

	__u8 ld_reserved[32];
	};

	/*
	* Inum Range
	* Describe a range of formal inode numbers allocated to
	* one machine to assign to inodes.
	*/

	#define GFS2_INUM_QUANTUM 1048576

	struct gfs2_inum_range {
	__be64 ir_start;
	__be64 ir_length;
	};

	/*
	* Statfs change
	* Describes an change to the pool of free and allocated
	* blocks.
	*/

	struct gfs2_statfs_change {
	__be64 sc_total;
	__be64 sc_free;
	__be64 sc_dinodes;
	};

	/*
	* Unlinked Tag
	* Describes an allocated inode that isn't linked into
	* the directory tree and might need to be deallocated.
	*/

	#define GFS2_UTF_UNINIT 0x00000001

	struct gfs2_unlinked_tag {
	struct gfs2_inum ut_inum;
	__be32 ut_flags; /* GFS2_UTF_... */
	__u32 __pad;
	};

	/*
	* Quota change
	* Describes an allocation change for a particular
	* user or group.
	*/

	#define GFS2_QCF_USER 0x00000001

	struct gfs2_quota_change {
	__be64 qc_change;
	__be32 qc_flags; /* GFS2_QCF_... */
	__be32 qc_id;
	};

	/* Translation functions */

	extern void gfs2_inum_in(struct gfs2_inum no, char buf);
	extern void gfs2_inum_out(struct gfs2_inum no, char buf);
	extern void gfs2_sb_in(struct gfs2_sb sb, char buf);
	extern void gfs2_rindex_in(struct gfs2_rindex ri, char buf);
	extern void gfs2_rindex_out(struct gfs2_rindex ri, char buf);
	extern void gfs2_rgrp_in(struct gfs2_rgrp rg, char buf);
	extern void gfs2_rgrp_out(struct gfs2_rgrp rg, char buf);
	extern void gfs2_quota_in(struct gfs2_quota qu, char buf);
	extern void gfs2_quota_out(struct gfs2_quota qu, char buf);
	extern void gfs2_dinode_in(struct gfs2_dinode di, char buf);
	extern void gfs2_dinode_out(struct gfs2_dinode di, char buf);
	extern void gfs2_leaf_in(struct gfs2_leaf lf, char buf);
	extern void gfs2_ea_header_in(struct gfs2_ea_header ea, char buf);
	extern void gfs2_ea_header_out(struct gfs2_ea_header ea, char buf);
	extern void gfs2_log_header_in(struct gfs2_log_header lh, char buf);
	extern void gfs2_inum_range_in(struct gfs2_inum_range ir, char buf);
	extern void gfs2_inum_range_out(struct gfs2_inum_range ir, char buf);
	extern void gfs2_statfs_change_in(struct gfs2_statfs_change sc, char buf);
	extern void gfs2_statfs_change_out(struct gfs2_statfs_change sc, char buf);
	extern void gfs2_unlinked_tag_in(struct gfs2_unlinked_tag ut, char buf);
	extern void gfs2_unlinked_tag_out(struct gfs2_unlinked_tag ut, char buf);
	extern void gfs2_quota_change_in(struct gfs2_quota_change qc, char buf);

	/* Printing functions */

	extern void gfs2_inum_print(struct gfs2_inum *no);
	extern void gfs2_meta_header_print(struct gfs2_meta_header *mh);
	extern void gfs2_sb_print(struct gfs2_sb *sb);
	extern void gfs2_rindex_print(struct gfs2_rindex *ri);
	extern void gfs2_rgrp_print(struct gfs2_rgrp *rg);
	extern void gfs2_quota_print(struct gfs2_quota *qu);
	extern void gfs2_dinode_print(struct gfs2_dinode *di);
	extern void gfs2_dirent_print(struct gfs2_dirent de, char name);
	extern void gfs2_leaf_print(struct gfs2_leaf *lf);
	extern void gfs2_ea_header_print(struct gfs2_ea_header ea, char name);
	extern void gfs2_log_header_print(struct gfs2_log_header *lh);
	extern void gfs2_log_descriptor_print(struct gfs2_log_descriptor *ld);
	extern void gfs2_inum_range_print(struct gfs2_inum_range *ir);
	extern void gfs2_statfs_change_print(struct gfs2_statfs_change *sc);
	extern void gfs2_unlinked_tag_print(struct gfs2_unlinked_tag *ut);
	extern void gfs2_quota_change_print(struct gfs2_quota_change *qc);

	#endif /* __GFS2_ONDISK_DOT_H__ */