[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 */
};

struct gfs2_sb_host {
	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];
};

struct gfs2_dinode_host {
	struct gfs2_meta_header di_header;

	struct gfs2_inum di_num;

	__u32 di_mode;	/* mode of file */
	__u32 di_uid;	/* owner's user id */
	__u32 di_gid;	/* owner's group id */
	__u32 di_nlink;	/* number of links to this file */
	__u64 di_size;	/* number of bytes in file */
	__u64 di_blocks;	/* number of blocks in file */
	__u64 di_atime;	/* time last accessed */
	__u64 di_mtime;	/* time last modified */
	__u64 di_ctime;	/* time last changed */
	__u32 di_major;	/* device major number */
	__u32 di_minor;	/* device minor number */

	/* This section varies from gfs1. Padding added to align with
         * remainder of dinode
	 */
	__u64 di_goal_meta;	/* rgrp to alloc from next */
	__u64 di_goal_data;	/* data block goal */
	__u64 di_generation;	/* generation number for NFS */

	__u32 di_flags;	/* GFS2_DIF_... */
	__u32 di_payload_format;  /* GFS2_FORMAT_... */
	__u16 di_height;	/* height of metadata */

	/* These only apply to directories  */
	__u16 di_depth;	/* Number of bits in the table */
	__u32 di_entries;	/* The number of entries in the directory */

	__u64 di_eattr;	/* extended attribute block number */
};

/*
 * 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_host *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_host *di, const void *buf);
extern void gfs2_dinode_out(const struct gfs2_dinode_host *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_host *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
f50dfaf7 AV	131	struct gfs2_sb_host {
	132	struct gfs2_meta_header sb_header;
	133
	134	__be32 sb_fs_format;
	135	__be32 sb_multihost_format;
	136	__u32 __pad0; /* Was superblock flags in gfs1 */
	137
	138	__be32 sb_bsize;
	139	__be32 sb_bsize_shift;
	140	__u32 __pad1; /* Was journal segment size in gfs1 */
	141
	142	struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */
	143	struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */
	144	struct gfs2_inum sb_root_dir;
	145
	146	char sb_lockproto[GFS2_LOCKNAME_LEN];
	147	char sb_locktable[GFS2_LOCKNAME_LEN];
	148	/* In gfs1, quota and license dinodes followed */
	149	};
	150
b3b94faa DT	151	/*
	152	* resource index structure
	153	*/
	154
	155	struct gfs2_rindex {
	156	__be64 ri_addr; /* grp block disk address */
	157	__be32 ri_length; /* length of rgrp header in fs blocks */
	158	__u32 __pad;
	159
	160	__be64 ri_data0; /* first data location */
	161	__be32 ri_data; /* num of data blocks in rgrp */
	162
	163	__be32 ri_bitbytes; /* number of bytes in data bitmaps */
	164
	165	__u8 ri_reserved[64];
	166	};
	167
	168	/*
	169	* resource group header structure
	170	*/
	171
	172	/* Number of blocks per byte in rgrp */
	173	#define GFS2_NBBY 4
	174	#define GFS2_BIT_SIZE 2
	175	#define GFS2_BIT_MASK 0x00000003
	176
	177	#define GFS2_BLKST_FREE 0
	178	#define GFS2_BLKST_USED 1
feaa7bba	179	#define GFS2_BLKST_UNLINKED 2
b3b94faa DT	180	#define GFS2_BLKST_DINODE 3
	181
	182	#define GFS2_RGF_JOURNAL 0x00000001
	183	#define GFS2_RGF_METAONLY 0x00000002
	184	#define GFS2_RGF_DATAONLY 0x00000004
	185	#define GFS2_RGF_NOALLOC 0x00000008
	186
	187	struct gfs2_rgrp {
	188	struct gfs2_meta_header rg_header;
	189
	190	__be32 rg_flags;
	191	__be32 rg_free;
	192	__be32 rg_dinodes;
4340fe62 SW	193	__be32 __pad;
4340fe62 SW	194	__be64 rg_igeneration;
b3b94faa	195
4340fe62	196	__u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */
b3b94faa DT	197	};
	198
	199	/*
	200	* quota structure
	201	*/
	202
	203	struct gfs2_quota {
	204	__be64 qu_limit;
	205	__be64 qu_warn;
	206	__be64 qu_value;
fc69d0d3	207	__u8 qu_reserved[64];
b3b94faa DT	208	};
	209
	210	/*
	211	* dinode structure
	212	*/
	213
	214	#define GFS2_MAX_META_HEIGHT 10
	215	#define GFS2_DIR_MAX_DEPTH 17
	216
	217	#define DT2IF(dt) (((dt) << 12) & S_IFMT)
	218	#define IF2DT(sif) (((sif) & S_IFMT) >> 12)
	219
7ea9ea83 SW	220	enum {
	221	gfs2fl_Jdata = 0,
	222	gfs2fl_ExHash = 1,
	223	gfs2fl_Unused = 2,
	224	gfs2fl_EaIndirect = 3,
	225	gfs2fl_Directio = 4,
	226	gfs2fl_Immutable = 5,
	227	gfs2fl_AppendOnly = 6,
	228	gfs2fl_NoAtime = 7,
	229	gfs2fl_Sync = 8,
	230	gfs2fl_System = 9,
	231	gfs2fl_TruncInProg = 29,
	232	gfs2fl_InheritDirectio = 30,
	233	gfs2fl_InheritJdata = 31,
	234	};
	235
b3b94faa DT	236	/* Dinode flags */
	237	#define GFS2_DIF_JDATA 0x00000001
	238	#define GFS2_DIF_EXHASH 0x00000002
	239	#define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
	240	#define GFS2_DIF_EA_INDIRECT 0x00000008
	241	#define GFS2_DIF_DIRECTIO 0x00000010
	242	#define GFS2_DIF_IMMUTABLE 0x00000020
	243	#define GFS2_DIF_APPENDONLY 0x00000040
	244	#define GFS2_DIF_NOATIME 0x00000080
	245	#define GFS2_DIF_SYNC 0x00000100
	246	#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
	247	#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
	248	#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
	249	#define GFS2_DIF_INHERIT_JDATA 0x80000000
	250
	251	struct gfs2_dinode {
	252	struct gfs2_meta_header di_header;
	253
	254	struct gfs2_inum di_num;
	255
	256	__be32 di_mode; /* mode of file */
	257	__be32 di_uid; /* owner's user id */
	258	__be32 di_gid; /* owner's group id */
	259	__be32 di_nlink; /* number of links to this file */
	260	__be64 di_size; /* number of bytes in file */
	261	__be64 di_blocks; /* number of blocks in file */
	262	__be64 di_atime; /* time last accessed */
	263	__be64 di_mtime; /* time last modified */
	264	__be64 di_ctime; /* time last changed */
	265	__be32 di_major; /* device major number */
	266	__be32 di_minor; /* device minor number */
	267
	268	/* This section varies from gfs1. Padding added to align with
	269	* remainder of dinode
	270	*/
	271	__be64 di_goal_meta; /* rgrp to alloc from next */
	272	__be64 di_goal_data; /* data block goal */
4340fe62	273	__be64 di_generation; /* generation number for NFS */
b3b94faa DT	274
	275	__be32 di_flags; /* GFS2_DIF_... */
	276	__be32 di_payload_format; /* GFS2_FORMAT_... */
	277	__u16 __pad1; /* Was ditype in gfs1 */
	278	__be16 di_height; /* height of metadata */
	279	__u32 __pad2; /* Unused incarnation number from gfs1 */
	280
	281	/* These only apply to directories */
	282	__u16 __pad3; /* Padding */
	283	__be16 di_depth; /* Number of bits in the table */
	284	__be32 di_entries; /* The number of entries in the directory */
	285
	286	struct gfs2_inum __pad4; /* Unused even in current gfs1 */
	287
	288	__be64 di_eattr; /* extended attribute block number */
	289
	290	__u8 di_reserved[56];
	291	};
	292
3ca68df6 AV	293	struct gfs2_dinode_host {
	294	struct gfs2_meta_header di_header;
	295
	296	struct gfs2_inum di_num;
	297
5c6edb57 AV	298	__u32 di_mode; /* mode of file */
	299	__u32 di_uid; /* owner's user id */
	300	__u32 di_gid; /* owner's group id */
	301	__u32 di_nlink; /* number of links to this file */
	302	__u64 di_size; /* number of bytes in file */
	303	__u64 di_blocks; /* number of blocks in file */
	304	__u64 di_atime; /* time last accessed */
	305	__u64 di_mtime; /* time last modified */
	306	__u64 di_ctime; /* time last changed */
	307	__u32 di_major; /* device major number */
	308	__u32 di_minor; /* device minor number */
3ca68df6 AV	309
	310	/* This section varies from gfs1. Padding added to align with
	311	* remainder of dinode
	312	*/
5c6edb57 AV	313	__u64 di_goal_meta; /* rgrp to alloc from next */
	314	__u64 di_goal_data; /* data block goal */
	315	__u64 di_generation; /* generation number for NFS */
3ca68df6	316
5c6edb57 AV	317	__u32 di_flags; /* GFS2_DIF_... */
	318	__u32 di_payload_format; /* GFS2_FORMAT_... */
	319	__u16 di_height; /* height of metadata */
3ca68df6 AV	320
3ca68df6 AV	321	/* These only apply to directories */
5c6edb57 AV	322	__u16 di_depth; /* Number of bits in the table */
5c6edb57 AV	323	__u32 di_entries; /* The number of entries in the directory */
3ca68df6	324
5c6edb57	325	__u64 di_eattr; /* extended attribute block number */
3ca68df6 AV	326	};
3ca68df6 AV	327
b3b94faa DT	328	/*
	329	* directory structure - many of these per directory file
	330	*/
	331
	332	#define GFS2_FNAMESIZE 255
	333	#define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)
	334
	335	struct gfs2_dirent {
	336	struct gfs2_inum de_inum;
	337	__be32 de_hash;
fc69d0d3 SW	338	__be16 de_rec_len;
	339	__be16 de_name_len;
	340	__be16 de_type;
	341	__u8 __pad[14];
b3b94faa DT	342	};
	343
	344	/*
	345	* Header of leaf directory nodes
	346	*/
	347
	348	struct gfs2_leaf {
	349	struct gfs2_meta_header lf_header;
	350
	351	__be16 lf_depth; /* Depth of leaf */
	352	__be16 lf_entries; /* Number of dirents in leaf */
	353	__be32 lf_dirent_format; /* Format of the dirents */
	354	__be64 lf_next; /* Next leaf, if overflow */
	355
fc69d0d3	356	__u8 lf_reserved[64];
b3b94faa DT	357	};
	358
	359	/*
	360	* Extended attribute header format
	361	*/
	362
	363	#define GFS2_EA_MAX_NAME_LEN 255
	364	#define GFS2_EA_MAX_DATA_LEN 65536
	365
	366	#define GFS2_EATYPE_UNUSED 0
	367	#define GFS2_EATYPE_USR 1
	368	#define GFS2_EATYPE_SYS 2
639b6d79	369	#define GFS2_EATYPE_SECURITY 3
b3b94faa	370
639b6d79	371	#define GFS2_EATYPE_LAST 3
b3b94faa DT	372	#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)
	373
	374	#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */
	375
	376	struct gfs2_ea_header {
	377	__be32 ea_rec_len;
	378	__be32 ea_data_len;
	379	__u8 ea_name_len; /* no NULL pointer after the string */
	380	__u8 ea_type; /* GFS2_EATYPE_... */
	381	__u8 ea_flags; /* GFS2_EAFLAG_... */
	382	__u8 ea_num_ptrs;
	383	__u32 __pad;
	384	};
	385
	386	/*
	387	* Log header structure
	388	*/
	389
	390	#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */
	391
	392	struct gfs2_log_header {
	393	struct gfs2_meta_header lh_header;
	394
	395	__be64 lh_sequence; /* Sequence number of this transaction */
	396	__be32 lh_flags; /* GFS2_LOG_HEAD_... */
	397	__be32 lh_tail; /* Block number of log tail */
	398	__be32 lh_blkno;
	399	__be32 lh_hash;
	400	};
	401
	402	/*
	403	* Log type descriptor
	404	*/
	405
	406	#define GFS2_LOG_DESC_METADATA 300
	407	/* ld_data1 is the number of metadata blocks in the descriptor.
	408	ld_data2 is unused. */
	409
	410	#define GFS2_LOG_DESC_REVOKE 301
	411	/* ld_data1 is the number of revoke blocks in the descriptor.
	412	ld_data2 is unused. */
	413
18ec7d5c SW	414	#define GFS2_LOG_DESC_JDATA 302
	415	/* ld_data1 is the number of data blocks in the descriptor.
	416	ld_data2 is unused. */
	417
b3b94faa DT	418	struct gfs2_log_descriptor {
	419	struct gfs2_meta_header ld_header;
	420
	421	__be32 ld_type; /* GFS2_LOG_DESC_... */
	422	__be32 ld_length; /* Number of buffers in this chunk */
	423	__be32 ld_data1; /* descriptor-specific field */
	424	__be32 ld_data2; /* descriptor-specific field */
	425
	426	__u8 ld_reserved[32];
	427	};
	428
	429	/*
	430	* Inum Range
	431	* Describe a range of formal inode numbers allocated to
	432	* one machine to assign to inodes.
	433	*/
	434
	435	#define GFS2_INUM_QUANTUM 1048576
	436
	437	struct gfs2_inum_range {
	438	__be64 ir_start;
	439	__be64 ir_length;
	440	};
	441
	442	/*
	443	* Statfs change
	444	* Describes an change to the pool of free and allocated
	445	* blocks.
	446	*/
	447
	448	struct gfs2_statfs_change {
	449	__be64 sc_total;
	450	__be64 sc_free;
	451	__be64 sc_dinodes;
	452	};
	453
b3b94faa DT	454	/*
	455	* Quota change
	456	* Describes an allocation change for a particular
	457	* user or group.
	458	*/
	459
	460	#define GFS2_QCF_USER 0x00000001
	461
	462	struct gfs2_quota_change {
	463	__be64 qc_change;
	464	__be32 qc_flags; /* GFS2_QCF_... */
	465	__be32 qc_id;
	466	};
	467
18ec7d5c	468	#ifdef __KERNEL__
b3b94faa DT	469	/* Translation functions */
b3b94faa DT	470
38c60ef2 SW	471	extern void gfs2_inum_in(struct gfs2_inum no, const void buf);
38c60ef2 SW	472	extern void gfs2_inum_out(const struct gfs2_inum no, void buf);
f50dfaf7	473	extern void gfs2_sb_in(struct gfs2_sb_host sb, const void buf);
38c60ef2 SW	474	extern void gfs2_rindex_in(struct gfs2_rindex ri, const void buf);
	475	extern void gfs2_rindex_out(const struct gfs2_rindex ri, void buf);
	476	extern void gfs2_rgrp_in(struct gfs2_rgrp rg, const void buf);
	477	extern void gfs2_rgrp_out(const struct gfs2_rgrp rg, void buf);
	478	extern void gfs2_quota_in(struct gfs2_quota qu, const void buf);
	479	extern void gfs2_quota_out(const struct gfs2_quota qu, void buf);
3ca68df6 AV	480	extern void gfs2_dinode_in(struct gfs2_dinode_host di, const void buf);
3ca68df6 AV	481	extern void gfs2_dinode_out(const struct gfs2_dinode_host di, void buf);
38c60ef2 SW	482	extern void gfs2_ea_header_in(struct gfs2_ea_header ea, const void buf);
	483	extern void gfs2_ea_header_out(const struct gfs2_ea_header ea, void buf);
	484	extern void gfs2_log_header_in(struct gfs2_log_header lh, const void buf);
	485	extern void gfs2_inum_range_in(struct gfs2_inum_range ir, const void buf);
	486	extern void gfs2_inum_range_out(const struct gfs2_inum_range ir, void buf);
	487	extern void gfs2_statfs_change_in(struct gfs2_statfs_change sc, const void buf);
	488	extern void gfs2_statfs_change_out(const struct gfs2_statfs_change sc, void buf);
	489	extern void gfs2_quota_change_in(struct gfs2_quota_change qc, const void buf);
b3b94faa DT	490
	491	/* Printing functions */
	492
38c60ef2	493	extern void gfs2_rindex_print(const struct gfs2_rindex *ri);
3ca68df6	494	extern void gfs2_dinode_print(const struct gfs2_dinode_host *di);
b3b94faa	495
18ec7d5c SW	496	#endif /* __KERNEL__ */
18ec7d5c SW	497
b3b94faa	498	#endif /* __GFS2_ONDISK_DOT_H__ */