[deliverable/linux.git] / include / linux / gfs2_ondisk.h

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 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		1600
#define GFS2_FORMAT_ED		1700
#define GFS2_FORMAT_QC		1400
/* These are format numbers for entities contained in files */
#define GFS2_FORMAT_RI		1100
#define GFS2_FORMAT_DE		1200
#define GFS2_FORMAT_QU		1500
/* These are part of the superblock */
#define GFS2_FORMAT_FS		1801
#define GFS2_FORMAT_MULTI	1900

/*
 * An on-disk inode number
 */

struct gfs2_inum {
	__be64 no_formal_ino;
	__be64 no_addr;
};

static inline int gfs2_inum_equal(const struct gfs2_inum *ino1,
				  const struct gfs2_inum *ino2)
{
	return ino1->no_formal_ino == ino2->no_formal_ino &&
	       ino1->no_addr == ino2->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	12
#define GFS2_METATYPE_EA	10
#define GFS2_METATYPE_ED	11
#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_UNLINKED	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;
	__be32 __pad;
	__be64 rg_igeneration;

	__u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */
};

/*
 * quota structure
 */

struct gfs2_quota {
	__be64 qu_limit;
	__be64 qu_warn;
	__be64 qu_value;
	__u8 qu_reserved[64];
};

/*
 * 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)

enum {
	gfs2fl_Jdata		= 0,
	gfs2fl_ExHash		= 1,
	gfs2fl_Unused		= 2,
	gfs2fl_EaIndirect	= 3,
	gfs2fl_Directio		= 4,
	gfs2fl_Immutable	= 5,
	gfs2fl_AppendOnly	= 6,
	gfs2fl_NoAtime		= 7,
	gfs2fl_Sync		= 8,
	gfs2fl_System		= 9,
	gfs2fl_TruncInProg	= 29,
	gfs2fl_InheritDirectio	= 30,
	gfs2fl_InheritJdata	= 31,
};

/* 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 */
	__be64 di_generation;	/* generation number for NFS */

	__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;
	__be16 de_rec_len;
	__be16 de_name_len;
	__be16 de_type;
	__u8 __pad[14];
};

/*
 * 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[64];
};

/*
 * 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_SECURITY	3

#define GFS2_EATYPE_LAST	3
#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. */

#define GFS2_LOG_DESC_JDATA	302
/* ld_data1 is the number of data 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;
};

/*
 * 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;
};

#ifdef __KERNEL__
/* Translation functions */

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

/* Printing functions */

extern void gfs2_rindex_print(const struct gfs2_rindex *ri);
extern void gfs2_dinode_print(const struct gfs2_dinode *di);

#endif /* __KERNEL__ */

#endif /* __GFS2_ONDISK_DOT_H__ */
Commit	Line	Data
b3b94faa	1	/*
feaa7bba SW	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
	7	* of the GNU General Public License v.2.
	8	*/
b3b94faa DT	9
	10	#ifndef __GFS2_ONDISK_DOT_H__
	11	#define __GFS2_ONDISK_DOT_H__
	12
	13	#define GFS2_MAGIC 0x01161970
	14	#define GFS2_BASIC_BLOCK 512
	15	#define GFS2_BASIC_BLOCK_SHIFT 9
	16
	17	/* Lock numbers of the LM_TYPE_NONDISK type */
	18
	19	#define GFS2_MOUNT_LOCK 0
	20	#define GFS2_LIVE_LOCK 1
	21	#define GFS2_TRANS_LOCK 2
	22	#define GFS2_RENAME_LOCK 3
	23
	24	/* Format numbers for various metadata types */
	25
	26	#define GFS2_FORMAT_NONE 0
	27	#define GFS2_FORMAT_SB 100
	28	#define GFS2_FORMAT_RG 200
	29	#define GFS2_FORMAT_RB 300
	30	#define GFS2_FORMAT_DI 400
	31	#define GFS2_FORMAT_IN 500
	32	#define GFS2_FORMAT_LF 600
	33	#define GFS2_FORMAT_JD 700
	34	#define GFS2_FORMAT_LH 800
	35	#define GFS2_FORMAT_LD 900
	36	#define GFS2_FORMAT_LB 1000
fc69d0d3 SW	37	#define GFS2_FORMAT_EA 1600
fc69d0d3 SW	38	#define GFS2_FORMAT_ED 1700
b3b94faa DT	39	#define GFS2_FORMAT_QC 1400
b3b94faa DT	40	/* These are format numbers for entities contained in files */
fc69d0d3 SW	41	#define GFS2_FORMAT_RI 1100
	42	#define GFS2_FORMAT_DE 1200
	43	#define GFS2_FORMAT_QU 1500
b3b94faa DT	44	/* These are part of the superblock */
	45	#define GFS2_FORMAT_FS 1801
	46	#define GFS2_FORMAT_MULTI 1900
	47
	48	/*
	49	* An on-disk inode number
	50	*/
	51
b3b94faa DT	52	struct gfs2_inum {
	53	__be64 no_formal_ino;
	54	__be64 no_addr;
	55	};
	56
5c676f6d SW	57	static inline int gfs2_inum_equal(const struct gfs2_inum *ino1,
	58	const struct gfs2_inum *ino2)
	59	{
	60	return ino1->no_formal_ino == ino2->no_formal_ino &&
	61	ino1->no_addr == ino2->no_addr;
	62	}
	63
b3b94faa DT	64	/*
	65	* Generic metadata head structure
	66	* Every inplace buffer logged in the journal must start with this.
	67	*/
	68
	69	#define GFS2_METATYPE_NONE 0
	70	#define GFS2_METATYPE_SB 1
	71	#define GFS2_METATYPE_RG 2
	72	#define GFS2_METATYPE_RB 3
	73	#define GFS2_METATYPE_DI 4
	74	#define GFS2_METATYPE_IN 5
	75	#define GFS2_METATYPE_LF 6
	76	#define GFS2_METATYPE_JD 7
	77	#define GFS2_METATYPE_LH 8
	78	#define GFS2_METATYPE_LD 9
fc69d0d3 SW	79	#define GFS2_METATYPE_LB 12
	80	#define GFS2_METATYPE_EA 10
	81	#define GFS2_METATYPE_ED 11
b3b94faa DT	82	#define GFS2_METATYPE_QC 14
	83
	84	struct gfs2_meta_header {
	85	__be32 mh_magic;
	86	__be32 mh_type;
	87	__be64 __pad0; /* Was generation number in gfs1 */
	88	__be32 mh_format;
	89	__be32 __pad1; /* Was incarnation number in gfs1 */
	90	};
	91
	92	/*
	93	* super-block structure
	94	*
	95	* It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes)
	96	*
	97	* Order is important, need to be able to read old superblocks to do on-disk
	98	* version upgrades.
	99	*/
	100
	101	/* Address of superblock in GFS2 basic blocks */
	102	#define GFS2_SB_ADDR 128
	103
	104	/* The lock number for the superblock (must be zero) */
	105	#define GFS2_SB_LOCK 0
	106
	107	/* Requirement: GFS2_LOCKNAME_LEN % 8 == 0
	108	Includes: the fencing zero at the end */
	109	#define GFS2_LOCKNAME_LEN 64
	110
	111	struct gfs2_sb {
	112	struct gfs2_meta_header sb_header;
	113
	114	__be32 sb_fs_format;
	115	__be32 sb_multihost_format;
	116	__u32 __pad0; /* Was superblock flags in gfs1 */
	117
	118	__be32 sb_bsize;
	119	__be32 sb_bsize_shift;
	120	__u32 __pad1; /* Was journal segment size in gfs1 */
	121
	122	struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */
	123	struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */
	124	struct gfs2_inum sb_root_dir;
	125
	126	char sb_lockproto[GFS2_LOCKNAME_LEN];
	127	char sb_locktable[GFS2_LOCKNAME_LEN];
	128	/* In gfs1, quota and license dinodes followed */
	129	};
	130
	131	/*
	132	* resource index structure
	133	*/
	134
	135	struct gfs2_rindex {
	136	__be64 ri_addr; /* grp block disk address */
	137	__be32 ri_length; /* length of rgrp header in fs blocks */
	138	__u32 __pad;
	139
	140	__be64 ri_data0; /* first data location */
	141	__be32 ri_data; /* num of data blocks in rgrp */
	142
	143	__be32 ri_bitbytes; /* number of bytes in data bitmaps */
	144
	145	__u8 ri_reserved[64];
146	};
147
148	/*
149	* resource group header structure
150	*/
151
152	/* Number of blocks per byte in rgrp */
153	#define GFS2_NBBY 4
154	#define GFS2_BIT_SIZE 2
155	#define GFS2_BIT_MASK 0x00000003
156
157	#define GFS2_BLKST_FREE 0
158	#define GFS2_BLKST_USED 1
feaa7bba	159	#define GFS2_BLKST_UNLINKED 2
b3b94faa DT	160	#define GFS2_BLKST_DINODE 3
	161
	162	#define GFS2_RGF_JOURNAL 0x00000001
	163	#define GFS2_RGF_METAONLY 0x00000002
	164	#define GFS2_RGF_DATAONLY 0x00000004
	165	#define GFS2_RGF_NOALLOC 0x00000008
	166
	167	struct gfs2_rgrp {
	168	struct gfs2_meta_header rg_header;
	169
	170	__be32 rg_flags;
	171	__be32 rg_free;
	172	__be32 rg_dinodes;
4340fe62 SW	173	__be32 __pad;
4340fe62 SW	174	__be64 rg_igeneration;
b3b94faa	175
4340fe62	176	__u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */
b3b94faa DT	177	};
	178
	179	/*
	180	* quota structure
	181	*/
	182
	183	struct gfs2_quota {
	184	__be64 qu_limit;
	185	__be64 qu_warn;
	186	__be64 qu_value;
fc69d0d3	187	__u8 qu_reserved[64];
b3b94faa DT	188	};
	189
	190	/*
	191	* dinode structure
	192	*/
	193
	194	#define GFS2_MAX_META_HEIGHT 10
	195	#define GFS2_DIR_MAX_DEPTH 17
	196
	197	#define DT2IF(dt) (((dt) << 12) & S_IFMT)
	198	#define IF2DT(sif) (((sif) & S_IFMT) >> 12)
	199
7ea9ea83 SW	200	enum {
	201	gfs2fl_Jdata = 0,
	202	gfs2fl_ExHash = 1,
	203	gfs2fl_Unused = 2,
	204	gfs2fl_EaIndirect = 3,
	205	gfs2fl_Directio = 4,
	206	gfs2fl_Immutable = 5,
	207	gfs2fl_AppendOnly = 6,
	208	gfs2fl_NoAtime = 7,
	209	gfs2fl_Sync = 8,
	210	gfs2fl_System = 9,
	211	gfs2fl_TruncInProg = 29,
	212	gfs2fl_InheritDirectio = 30,
	213	gfs2fl_InheritJdata = 31,
	214	};
	215
b3b94faa DT	216	/* Dinode flags */
	217	#define GFS2_DIF_JDATA 0x00000001
	218	#define GFS2_DIF_EXHASH 0x00000002
	219	#define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
	220	#define GFS2_DIF_EA_INDIRECT 0x00000008
	221	#define GFS2_DIF_DIRECTIO 0x00000010
	222	#define GFS2_DIF_IMMUTABLE 0x00000020
	223	#define GFS2_DIF_APPENDONLY 0x00000040
	224	#define GFS2_DIF_NOATIME 0x00000080
	225	#define GFS2_DIF_SYNC 0x00000100
	226	#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
	227	#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
	228	#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
	229	#define GFS2_DIF_INHERIT_JDATA 0x80000000
	230
	231	struct gfs2_dinode {
	232	struct gfs2_meta_header di_header;
	233
	234	struct gfs2_inum di_num;
	235
	236	__be32 di_mode; /* mode of file */
	237	__be32 di_uid; /* owner's user id */
	238	__be32 di_gid; /* owner's group id */
	239	__be32 di_nlink; /* number of links to this file */
	240	__be64 di_size; /* number of bytes in file */
	241	__be64 di_blocks; /* number of blocks in file */
	242	__be64 di_atime; /* time last accessed */
	243	__be64 di_mtime; /* time last modified */
	244	__be64 di_ctime; /* time last changed */
	245	__be32 di_major; /* device major number */
	246	__be32 di_minor; /* device minor number */
	247
	248	/* This section varies from gfs1. Padding added to align with
	249	* remainder of dinode
	250	*/
	251	__be64 di_goal_meta; /* rgrp to alloc from next */
	252	__be64 di_goal_data; /* data block goal */
4340fe62	253	__be64 di_generation; /* generation number for NFS */
b3b94faa DT	254
	255	__be32 di_flags; /* GFS2_DIF_... */
	256	__be32 di_payload_format; /* GFS2_FORMAT_... */
	257	__u16 __pad1; /* Was ditype in gfs1 */
	258	__be16 di_height; /* height of metadata */
	259	__u32 __pad2; /* Unused incarnation number from gfs1 */
	260
	261	/* These only apply to directories */
	262	__u16 __pad3; /* Padding */
	263	__be16 di_depth; /* Number of bits in the table */
	264	__be32 di_entries; /* The number of entries in the directory */
	265
	266	struct gfs2_inum __pad4; /* Unused even in current gfs1 */
	267
	268	__be64 di_eattr; /* extended attribute block number */
	269
	270	__u8 di_reserved[56];
	271	};
	272
	273	/*
	274	* directory structure - many of these per directory file
	275	*/
	276
	277	#define GFS2_FNAMESIZE 255
	278	#define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)
	279
	280	struct gfs2_dirent {
	281	struct gfs2_inum de_inum;
	282	__be32 de_hash;
fc69d0d3 SW	283	__be16 de_rec_len;
	284	__be16 de_name_len;
	285	__be16 de_type;
	286	__u8 __pad[14];
b3b94faa DT	287	};
	288
	289	/*
	290	* Header of leaf directory nodes
	291	*/
	292
	293	struct gfs2_leaf {
	294	struct gfs2_meta_header lf_header;
	295
	296	__be16 lf_depth; /* Depth of leaf */
	297	__be16 lf_entries; /* Number of dirents in leaf */
	298	__be32 lf_dirent_format; /* Format of the dirents */
	299	__be64 lf_next; /* Next leaf, if overflow */
	300
fc69d0d3	301	__u8 lf_reserved[64];
b3b94faa DT	302	};
	303
	304	/*
	305	* Extended attribute header format
	306	*/
	307
	308	#define GFS2_EA_MAX_NAME_LEN 255
	309	#define GFS2_EA_MAX_DATA_LEN 65536
	310
	311	#define GFS2_EATYPE_UNUSED 0
	312	#define GFS2_EATYPE_USR 1
	313	#define GFS2_EATYPE_SYS 2
639b6d79	314	#define GFS2_EATYPE_SECURITY 3
b3b94faa	315
639b6d79	316	#define GFS2_EATYPE_LAST 3
b3b94faa DT	317	#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)
	318
	319	#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */
	320
	321	struct gfs2_ea_header {
	322	__be32 ea_rec_len;
	323	__be32 ea_data_len;
	324	__u8 ea_name_len; /* no NULL pointer after the string */
	325	__u8 ea_type; /* GFS2_EATYPE_... */
	326	__u8 ea_flags; /* GFS2_EAFLAG_... */
	327	__u8 ea_num_ptrs;
	328	__u32 __pad;
	329	};
	330
	331	/*
	332	* Log header structure
	333	*/
	334
	335	#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */
	336
	337	struct gfs2_log_header {
	338	struct gfs2_meta_header lh_header;
	339
	340	__be64 lh_sequence; /* Sequence number of this transaction */
	341	__be32 lh_flags; /* GFS2_LOG_HEAD_... */
	342	__be32 lh_tail; /* Block number of log tail */
	343	__be32 lh_blkno;
	344	__be32 lh_hash;
	345	};
	346
	347	/*
	348	* Log type descriptor
	349	*/
	350
	351	#define GFS2_LOG_DESC_METADATA 300
	352	/* ld_data1 is the number of metadata blocks in the descriptor.
	353	ld_data2 is unused. */
	354
	355	#define GFS2_LOG_DESC_REVOKE 301
	356	/* ld_data1 is the number of revoke blocks in the descriptor.
	357	ld_data2 is unused. */
	358
18ec7d5c SW	359	#define GFS2_LOG_DESC_JDATA 302
	360	/* ld_data1 is the number of data blocks in the descriptor.
	361	ld_data2 is unused. */
	362
b3b94faa DT	363	struct gfs2_log_descriptor {
	364	struct gfs2_meta_header ld_header;
	365
	366	__be32 ld_type; /* GFS2_LOG_DESC_... */
	367	__be32 ld_length; /* Number of buffers in this chunk */
	368	__be32 ld_data1; /* descriptor-specific field */
	369	__be32 ld_data2; /* descriptor-specific field */
	370
	371	__u8 ld_reserved[32];
	372	};
	373
	374	/*
	375	* Inum Range
	376	* Describe a range of formal inode numbers allocated to
	377	* one machine to assign to inodes.
	378	*/
	379
	380	#define GFS2_INUM_QUANTUM 1048576
	381
	382	struct gfs2_inum_range {
	383	__be64 ir_start;
	384	__be64 ir_length;
	385	};
	386
	387	/*
	388	* Statfs change
	389	* Describes an change to the pool of free and allocated
	390	* blocks.
	391	*/
	392
	393	struct gfs2_statfs_change {
	394	__be64 sc_total;
	395	__be64 sc_free;
	396	__be64 sc_dinodes;
	397	};
	398
b3b94faa DT	399	/*
	400	* Quota change
	401	* Describes an allocation change for a particular
	402	* user or group.
	403	*/
	404
	405	#define GFS2_QCF_USER 0x00000001
	406
	407	struct gfs2_quota_change {
	408	__be64 qc_change;
	409	__be32 qc_flags; /* GFS2_QCF_... */
	410	__be32 qc_id;
	411	};
	412
18ec7d5c	413	#ifdef __KERNEL__
b3b94faa DT	414	/* Translation functions */
b3b94faa DT	415
38c60ef2 SW	416	extern void gfs2_inum_in(struct gfs2_inum no, const void buf);
	417	extern void gfs2_inum_out(const struct gfs2_inum no, void buf);
	418	extern void gfs2_sb_in(struct gfs2_sb sb, const void buf);
	419	extern void gfs2_rindex_in(struct gfs2_rindex ri, const void buf);
	420	extern void gfs2_rindex_out(const struct gfs2_rindex ri, void buf);
	421	extern void gfs2_rgrp_in(struct gfs2_rgrp rg, const void buf);
	422	extern void gfs2_rgrp_out(const struct gfs2_rgrp rg, void buf);
	423	extern void gfs2_quota_in(struct gfs2_quota qu, const void buf);
	424	extern void gfs2_quota_out(const struct gfs2_quota qu, void buf);
	425	extern void gfs2_dinode_in(struct gfs2_dinode di, const void buf);
	426	extern void gfs2_dinode_out(const struct gfs2_dinode di, void buf);
	427	extern void gfs2_ea_header_in(struct gfs2_ea_header ea, const void buf);
	428	extern void gfs2_ea_header_out(const struct gfs2_ea_header ea, void buf);
	429	extern void gfs2_log_header_in(struct gfs2_log_header lh, const void buf);
	430	extern void gfs2_inum_range_in(struct gfs2_inum_range ir, const void buf);
	431	extern void gfs2_inum_range_out(const struct gfs2_inum_range ir, void buf);
	432	extern void gfs2_statfs_change_in(struct gfs2_statfs_change sc, const void buf);
	433	extern void gfs2_statfs_change_out(const struct gfs2_statfs_change sc, void buf);
	434	extern void gfs2_quota_change_in(struct gfs2_quota_change qc, const void buf);
b3b94faa DT	435
	436	/* Printing functions */
	437
38c60ef2 SW	438	extern void gfs2_rindex_print(const struct gfs2_rindex *ri);
38c60ef2 SW	439	extern void gfs2_dinode_print(const struct gfs2_dinode *di);
b3b94faa	440
18ec7d5c SW	441	#endif /* __KERNEL__ */
18ec7d5c SW	442
b3b94faa	443	#endif /* __GFS2_ONDISK_DOT_H__ */