[linux-2.6-block.git] / include / linux / gfs2_ondisk.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		1600
#define GFS2_FORMAT_ED		1700
#define GFS2_FORMAT_UT		1300
#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_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;
	__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)

/* 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;
	__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_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. */

#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;
};

/*
 * 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;
};

#ifdef __KERNEL__
/* Translation functions */

extern void gfs2_inum_in(struct gfs2_inum *no, char *buf);
extern void gfs2_inum_out(const 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_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 /* __KERNEL__ */

#endif /* __GFS2_ONDISK_DOT_H__ */
Commit	Line	Data
b3b94faa	1	/*
fc69d0d3 SW	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	3	* Copyright (C) 2004-2005 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_UT 1300
	40	#define GFS2_FORMAT_QC 1400
	41	/* These are format numbers for entities contained in files */
fc69d0d3 SW	42	#define GFS2_FORMAT_RI 1100
	43	#define GFS2_FORMAT_DE 1200
	44	#define GFS2_FORMAT_QU 1500
b3b94faa DT	45	/* These are part of the superblock */
	46	#define GFS2_FORMAT_FS 1801
	47	#define GFS2_FORMAT_MULTI 1900
	48
	49	/*
	50	* An on-disk inode number
	51	*/
	52
b3b94faa DT	53	struct gfs2_inum {
	54	__be64 no_formal_ino;
	55	__be64 no_addr;
	56	};
	57
5c676f6d SW	58	static inline int gfs2_inum_equal(const struct gfs2_inum *ino1,
	59	const struct gfs2_inum *ino2)
	60	{
	61	return ino1->no_formal_ino == ino2->no_formal_ino &&
	62	ino1->no_addr == ino2->no_addr;
	63	}
	64
b3b94faa DT	65	/*
	66	* Generic metadata head structure
	67	* Every inplace buffer logged in the journal must start with this.
	68	*/
	69
	70	#define GFS2_METATYPE_NONE 0
	71	#define GFS2_METATYPE_SB 1
	72	#define GFS2_METATYPE_RG 2
	73	#define GFS2_METATYPE_RB 3
	74	#define GFS2_METATYPE_DI 4
	75	#define GFS2_METATYPE_IN 5
	76	#define GFS2_METATYPE_LF 6
	77	#define GFS2_METATYPE_JD 7
	78	#define GFS2_METATYPE_LH 8
	79	#define GFS2_METATYPE_LD 9
fc69d0d3 SW	80	#define GFS2_METATYPE_LB 12
	81	#define GFS2_METATYPE_EA 10
	82	#define GFS2_METATYPE_ED 11
b3b94faa DT	83	#define GFS2_METATYPE_UT 13
	84	#define GFS2_METATYPE_QC 14
	85
	86	struct gfs2_meta_header {
	87	__be32 mh_magic;
	88	__be32 mh_type;
	89	__be64 __pad0; /* Was generation number in gfs1 */
	90	__be32 mh_format;
	91	__be32 __pad1; /* Was incarnation number in gfs1 */
	92	};
	93
	94	/*
	95	* super-block structure
	96	*
	97	* It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes)
	98	*
	99	* Order is important, need to be able to read old superblocks to do on-disk
	100	* version upgrades.
	101	*/
	102
	103	/* Address of superblock in GFS2 basic blocks */
	104	#define GFS2_SB_ADDR 128
	105
	106	/* The lock number for the superblock (must be zero) */
	107	#define GFS2_SB_LOCK 0
	108
	109	/* Requirement: GFS2_LOCKNAME_LEN % 8 == 0
	110	Includes: the fencing zero at the end */
	111	#define GFS2_LOCKNAME_LEN 64
	112
	113	struct gfs2_sb {
	114	struct gfs2_meta_header sb_header;
	115
	116	__be32 sb_fs_format;
	117	__be32 sb_multihost_format;
	118	__u32 __pad0; /* Was superblock flags in gfs1 */
	119
	120	__be32 sb_bsize;
	121	__be32 sb_bsize_shift;
	122	__u32 __pad1; /* Was journal segment size in gfs1 */
	123
	124	struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */
	125	struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */
	126	struct gfs2_inum sb_root_dir;
	127
	128	char sb_lockproto[GFS2_LOCKNAME_LEN];
	129	char sb_locktable[GFS2_LOCKNAME_LEN];
	130	/* In gfs1, quota and license dinodes followed */
	131	};
	132
	133	/*
	134	* resource index structure
	135	*/
	136
	137	struct gfs2_rindex {
	138	__be64 ri_addr; /* grp block disk address */
	139	__be32 ri_length; /* length of rgrp header in fs blocks */
	140	__u32 __pad;
	141
	142	__be64 ri_data0; /* first data location */
	143	__be32 ri_data; /* num of data blocks in rgrp */
	144
	145	__be32 ri_bitbytes; /* number of bytes in data bitmaps */
	146
147	__u8 ri_reserved[64];
148	};
149
150	/*
151	* resource group header structure
152	*/
153
154	/* Number of blocks per byte in rgrp */
155	#define GFS2_NBBY 4
156	#define GFS2_BIT_SIZE 2
157	#define GFS2_BIT_MASK 0x00000003
158
159	#define GFS2_BLKST_FREE 0
160	#define GFS2_BLKST_USED 1
161	#define GFS2_BLKST_INVALID 2
162	#define GFS2_BLKST_DINODE 3
163
164	#define GFS2_RGF_JOURNAL 0x00000001
165	#define GFS2_RGF_METAONLY 0x00000002
166	#define GFS2_RGF_DATAONLY 0x00000004
167	#define GFS2_RGF_NOALLOC 0x00000008
168
169	struct gfs2_rgrp {
170	struct gfs2_meta_header rg_header;
171
172	__be32 rg_flags;
173	__be32 rg_free;
174	__be32 rg_dinodes;
175
176	__u8 rg_reserved[92]; /* Several fields from gfs1 now reserved */
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
	200	/* Dinode flags */
	201	#define GFS2_DIF_JDATA 0x00000001
	202	#define GFS2_DIF_EXHASH 0x00000002
	203	#define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
	204	#define GFS2_DIF_EA_INDIRECT 0x00000008
	205	#define GFS2_DIF_DIRECTIO 0x00000010
	206	#define GFS2_DIF_IMMUTABLE 0x00000020
	207	#define GFS2_DIF_APPENDONLY 0x00000040
	208	#define GFS2_DIF_NOATIME 0x00000080
	209	#define GFS2_DIF_SYNC 0x00000100
	210	#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
	211	#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
	212	#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
	213	#define GFS2_DIF_INHERIT_JDATA 0x80000000
	214
	215	struct gfs2_dinode {
	216	struct gfs2_meta_header di_header;
	217
	218	struct gfs2_inum di_num;
	219
	220	__be32 di_mode; /* mode of file */
	221	__be32 di_uid; /* owner's user id */
	222	__be32 di_gid; /* owner's group id */
	223	__be32 di_nlink; /* number of links to this file */
	224	__be64 di_size; /* number of bytes in file */
	225	__be64 di_blocks; /* number of blocks in file */
	226	__be64 di_atime; /* time last accessed */
	227	__be64 di_mtime; /* time last modified */
	228	__be64 di_ctime; /* time last changed */
	229	__be32 di_major; /* device major number */
	230	__be32 di_minor; /* device minor number */
	231
	232	/* This section varies from gfs1. Padding added to align with
	233	* remainder of dinode
	234	*/
	235	__be64 di_goal_meta; /* rgrp to alloc from next */
	236	__be64 di_goal_data; /* data block goal */
	237	__u32 __pad[2];
	238
	239	__be32 di_flags; /* GFS2_DIF_... */
	240	__be32 di_payload_format; /* GFS2_FORMAT_... */
	241	__u16 __pad1; /* Was ditype in gfs1 */
	242	__be16 di_height; /* height of metadata */
	243	__u32 __pad2; /* Unused incarnation number from gfs1 */
	244
	245	/* These only apply to directories */
	246	__u16 __pad3; /* Padding */
	247	__be16 di_depth; /* Number of bits in the table */
	248	__be32 di_entries; /* The number of entries in the directory */
	249
	250	struct gfs2_inum __pad4; /* Unused even in current gfs1 */
	251
252	__be64 di_eattr; /* extended attribute block number */
253
254	__u8 di_reserved[56];
255	};
256
257	/*
258	* directory structure - many of these per directory file
259	*/
260
261	#define GFS2_FNAMESIZE 255
262	#define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)
263
264	struct gfs2_dirent {
265	struct gfs2_inum de_inum;
266	__be32 de_hash;
fc69d0d3 SW	267	__be16 de_rec_len;
	268	__be16 de_name_len;
	269	__be16 de_type;
	270	__u8 __pad[14];
b3b94faa DT	271	};
	272
	273	/*
	274	* Header of leaf directory nodes
	275	*/
	276
	277	struct gfs2_leaf {
	278	struct gfs2_meta_header lf_header;
	279
	280	__be16 lf_depth; /* Depth of leaf */
	281	__be16 lf_entries; /* Number of dirents in leaf */
	282	__be32 lf_dirent_format; /* Format of the dirents */
	283	__be64 lf_next; /* Next leaf, if overflow */
	284
fc69d0d3	285	__u8 lf_reserved[64];
b3b94faa DT	286	};
	287
	288	/*
	289	* Extended attribute header format
	290	*/
	291
	292	#define GFS2_EA_MAX_NAME_LEN 255
	293	#define GFS2_EA_MAX_DATA_LEN 65536
	294
	295	#define GFS2_EATYPE_UNUSED 0
	296	#define GFS2_EATYPE_USR 1
	297	#define GFS2_EATYPE_SYS 2
	298
	299	#define GFS2_EATYPE_LAST 2
	300	#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)
	301
	302	#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */
	303
	304	struct gfs2_ea_header {
	305	__be32 ea_rec_len;
	306	__be32 ea_data_len;
	307	__u8 ea_name_len; /* no NULL pointer after the string */
	308	__u8 ea_type; /* GFS2_EATYPE_... */
	309	__u8 ea_flags; /* GFS2_EAFLAG_... */
	310	__u8 ea_num_ptrs;
	311	__u32 __pad;
	312	};
	313
	314	/*
	315	* Log header structure
	316	*/
	317
	318	#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */
	319
	320	struct gfs2_log_header {
	321	struct gfs2_meta_header lh_header;
	322
	323	__be64 lh_sequence; /* Sequence number of this transaction */
	324	__be32 lh_flags; /* GFS2_LOG_HEAD_... */
	325	__be32 lh_tail; /* Block number of log tail */
	326	__be32 lh_blkno;
	327	__be32 lh_hash;
	328	};
	329
	330	/*
	331	* Log type descriptor
	332	*/
	333
	334	#define GFS2_LOG_DESC_METADATA 300
	335	/* ld_data1 is the number of metadata blocks in the descriptor.
	336	ld_data2 is unused. */
	337
	338	#define GFS2_LOG_DESC_REVOKE 301
	339	/* ld_data1 is the number of revoke blocks in the descriptor.
	340	ld_data2 is unused. */
	341
18ec7d5c SW	342	#define GFS2_LOG_DESC_JDATA 302
	343	/* ld_data1 is the number of data blocks in the descriptor.
	344	ld_data2 is unused. */
	345
b3b94faa DT	346	struct gfs2_log_descriptor {
	347	struct gfs2_meta_header ld_header;
	348
	349	__be32 ld_type; /* GFS2_LOG_DESC_... */
	350	__be32 ld_length; /* Number of buffers in this chunk */
	351	__be32 ld_data1; /* descriptor-specific field */
	352	__be32 ld_data2; /* descriptor-specific field */
	353
	354	__u8 ld_reserved[32];
	355	};
	356
	357	/*
	358	* Inum Range
	359	* Describe a range of formal inode numbers allocated to
	360	* one machine to assign to inodes.
	361	*/
	362
	363	#define GFS2_INUM_QUANTUM 1048576
	364
	365	struct gfs2_inum_range {
	366	__be64 ir_start;
	367	__be64 ir_length;
	368	};
	369
	370	/*
	371	* Statfs change
	372	* Describes an change to the pool of free and allocated
	373	* blocks.
	374	*/
	375
	376	struct gfs2_statfs_change {
	377	__be64 sc_total;
	378	__be64 sc_free;
	379	__be64 sc_dinodes;
	380	};
	381
	382	/*
	383	* Unlinked Tag
	384	* Describes an allocated inode that isn't linked into
	385	* the directory tree and might need to be deallocated.
	386	*/
	387
	388	#define GFS2_UTF_UNINIT 0x00000001
	389
	390	struct gfs2_unlinked_tag {
	391	struct gfs2_inum ut_inum;
	392	__be32 ut_flags; /* GFS2_UTF_... */
	393	__u32 __pad;
	394	};
	395
	396	/*
	397	* Quota change
	398	* Describes an allocation change for a particular
	399	* user or group.
	400	*/
	401
	402	#define GFS2_QCF_USER 0x00000001
	403
	404	struct gfs2_quota_change {
	405	__be64 qc_change;
	406	__be32 qc_flags; /* GFS2_QCF_... */
	407	__be32 qc_id;
	408	};
	409
18ec7d5c	410	#ifdef __KERNEL__
b3b94faa DT	411	/* Translation functions */
	412
	413	extern void gfs2_inum_in(struct gfs2_inum no, char buf);
c752666c	414	extern void gfs2_inum_out(const struct gfs2_inum no, char buf);
b3b94faa	415	extern void gfs2_sb_in(struct gfs2_sb sb, char buf);
b3b94faa DT	416	extern void gfs2_rindex_in(struct gfs2_rindex ri, char buf);
	417	extern void gfs2_rindex_out(struct gfs2_rindex ri, char buf);
	418	extern void gfs2_rgrp_in(struct gfs2_rgrp rg, char buf);
	419	extern void gfs2_rgrp_out(struct gfs2_rgrp rg, char buf);
	420	extern void gfs2_quota_in(struct gfs2_quota qu, char buf);
	421	extern void gfs2_quota_out(struct gfs2_quota qu, char buf);
	422	extern void gfs2_dinode_in(struct gfs2_dinode di, char buf);
	423	extern void gfs2_dinode_out(struct gfs2_dinode di, char buf);
b3b94faa DT	424	extern void gfs2_ea_header_in(struct gfs2_ea_header ea, char buf);
	425	extern void gfs2_ea_header_out(struct gfs2_ea_header ea, char buf);
	426	extern void gfs2_log_header_in(struct gfs2_log_header lh, char buf);
	427	extern void gfs2_inum_range_in(struct gfs2_inum_range ir, char buf);
	428	extern void gfs2_inum_range_out(struct gfs2_inum_range ir, char buf);
	429	extern void gfs2_statfs_change_in(struct gfs2_statfs_change sc, char buf);
	430	extern void gfs2_statfs_change_out(struct gfs2_statfs_change sc, char buf);
	431	extern void gfs2_unlinked_tag_in(struct gfs2_unlinked_tag ut, char buf);
	432	extern void gfs2_unlinked_tag_out(struct gfs2_unlinked_tag ut, char buf);
	433	extern void gfs2_quota_change_in(struct gfs2_quota_change qc, char buf);
b3b94faa DT	434
	435	/* Printing functions */
	436
	437	extern void gfs2_inum_print(struct gfs2_inum *no);
	438	extern void gfs2_meta_header_print(struct gfs2_meta_header *mh);
	439	extern void gfs2_sb_print(struct gfs2_sb *sb);
	440	extern void gfs2_rindex_print(struct gfs2_rindex *ri);
	441	extern void gfs2_rgrp_print(struct gfs2_rgrp *rg);
	442	extern void gfs2_quota_print(struct gfs2_quota *qu);
	443	extern void gfs2_dinode_print(struct gfs2_dinode *di);
	444	extern void gfs2_dirent_print(struct gfs2_dirent de, char name);
	445	extern void gfs2_leaf_print(struct gfs2_leaf *lf);
	446	extern void gfs2_ea_header_print(struct gfs2_ea_header ea, char name);
	447	extern void gfs2_log_header_print(struct gfs2_log_header *lh);
	448	extern void gfs2_log_descriptor_print(struct gfs2_log_descriptor *ld);
	449	extern void gfs2_inum_range_print(struct gfs2_inum_range *ir);
	450	extern void gfs2_statfs_change_print(struct gfs2_statfs_change *sc);
	451	extern void gfs2_unlinked_tag_print(struct gfs2_unlinked_tag *ut);
	452	extern void gfs2_quota_change_print(struct gfs2_quota_change *qc);
	453
18ec7d5c SW	454	#endif /* __KERNEL__ */
18ec7d5c SW	455
b3b94faa	456	#endif /* __GFS2_ONDISK_DOT_H__ */