[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__

#include <linux/types.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
#define GFS2_CONTROL_LOCK	4
#define GFS2_MOUNTED_LOCK	5

/* 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;
};

/*
 * 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;
	/* This union is to keep userspace happy */
	union {
		__be32 mh_jid;		/* Was incarnation number in gfs1 */
		__be32 __pad1;
	};
};

/*
 * 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];

	struct gfs2_inum __pad3; /* Was quota inode in gfs1 */
	struct gfs2_inum __pad4; /* Was licence inode in gfs1 */
#define GFS2_HAS_UUID 1
	__u8 sb_uuid[16]; /* The UUID, maybe 0 for backwards compat */
};

/*
 * 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 */
	__be32 di_atime_nsec;   /* nsec portion of atime */
	__be32 di_mtime_nsec;   /* nsec portion of mtime */
	__be32 di_ctime_nsec;   /* nsec portion of ctime */

	__u8 di_reserved[44];
};

/*
 * 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
 *
 * This works in a similar way to dirents. There is a fixed size header
 * followed by a variable length section made up of the name and the
 * associated data. In the case of a "stuffed" entry, the value is
 * inline directly after the name, the ea_num_ptrs entry will be
 * zero in that case. For non-"stuffed" entries, there will be
 * a set of pointers (aligned to 8 byte boundary) to the block(s)
 * containing the value.
 *
 * The blocks containing the values and the blocks containing the
 * extended attribute headers themselves all start with the common
 * metadata header. Each inode, if it has extended attributes, will
 * have either a single block containing the extended attribute headers
 * or a single indirect block pointing to blocks containing the
 * extended attribure headers.
 *
 * The maximim size of the data part of an extended attribute is 64k
 * so the number of blocks required depends upon block size. Since the
 * block size also determines the number of pointers in an indirect
 * block, its a fairly complicated calculation to work out the maximum
 * number of blocks that an inode may have relating to extended attributes.
 *
 */

#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;
};

struct gfs2_quota_lvb {
        __be32 qb_magic;
        __u32 __pad;
        __be64 qb_limit;      /* Hard limit of # blocks to alloc */
        __be64 qb_warn;       /* Warn user when alloc is above this # */
        __be64 qb_value;       /* Current # blocks allocated */
};

#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
237416fe JSR	13	#include <linux/types.h>
237416fe JSR	14
b3b94faa DT	15	#define GFS2_MAGIC 0x01161970
	16	#define GFS2_BASIC_BLOCK 512
	17	#define GFS2_BASIC_BLOCK_SHIFT 9
	18
	19	/* Lock numbers of the LM_TYPE_NONDISK type */
	20
	21	#define GFS2_MOUNT_LOCK 0
	22	#define GFS2_LIVE_LOCK 1
	23	#define GFS2_TRANS_LOCK 2
	24	#define GFS2_RENAME_LOCK 3
e0c2a9aa DT	25	#define GFS2_CONTROL_LOCK 4
e0c2a9aa DT	26	#define GFS2_MOUNTED_LOCK 5
b3b94faa DT	27
	28	/* Format numbers for various metadata types */
	29
	30	#define GFS2_FORMAT_NONE 0
	31	#define GFS2_FORMAT_SB 100
	32	#define GFS2_FORMAT_RG 200
	33	#define GFS2_FORMAT_RB 300
	34	#define GFS2_FORMAT_DI 400
	35	#define GFS2_FORMAT_IN 500
	36	#define GFS2_FORMAT_LF 600
	37	#define GFS2_FORMAT_JD 700
	38	#define GFS2_FORMAT_LH 800
	39	#define GFS2_FORMAT_LD 900
	40	#define GFS2_FORMAT_LB 1000
fc69d0d3 SW	41	#define GFS2_FORMAT_EA 1600
fc69d0d3 SW	42	#define GFS2_FORMAT_ED 1700
b3b94faa DT	43	#define GFS2_FORMAT_QC 1400
b3b94faa DT	44	/* These are format numbers for entities contained in files */
fc69d0d3 SW	45	#define GFS2_FORMAT_RI 1100
	46	#define GFS2_FORMAT_DE 1200
	47	#define GFS2_FORMAT_QU 1500
b3b94faa DT	48	/* These are part of the superblock */
	49	#define GFS2_FORMAT_FS 1801
	50	#define GFS2_FORMAT_MULTI 1900
	51
	52	/*
	53	* An on-disk inode number
	54	*/
	55
b3b94faa DT	56	struct gfs2_inum {
	57	__be64 no_formal_ino;
	58	__be64 no_addr;
	59	};
	60
	61	/*
	62	* Generic metadata head structure
	63	* Every inplace buffer logged in the journal must start with this.
	64	*/
	65
	66	#define GFS2_METATYPE_NONE 0
	67	#define GFS2_METATYPE_SB 1
	68	#define GFS2_METATYPE_RG 2
	69	#define GFS2_METATYPE_RB 3
	70	#define GFS2_METATYPE_DI 4
	71	#define GFS2_METATYPE_IN 5
	72	#define GFS2_METATYPE_LF 6
	73	#define GFS2_METATYPE_JD 7
	74	#define GFS2_METATYPE_LH 8
	75	#define GFS2_METATYPE_LD 9
fc69d0d3 SW	76	#define GFS2_METATYPE_LB 12
	77	#define GFS2_METATYPE_EA 10
	78	#define GFS2_METATYPE_ED 11
b3b94faa DT	79	#define GFS2_METATYPE_QC 14
	80
	81	struct gfs2_meta_header {
	82	__be32 mh_magic;
	83	__be32 mh_type;
	84	__be64 __pad0; /* Was generation number in gfs1 */
	85	__be32 mh_format;
0ab7d13f SW	86	/* This union is to keep userspace happy */
	87	union {
	88	__be32 mh_jid; /* Was incarnation number in gfs1 */
	89	__be32 __pad1;
	90	};
b3b94faa DT	91	};
	92
	93	/*
	94	* super-block structure
	95	*
	96	* It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes)
	97	*
	98	* Order is important, need to be able to read old superblocks to do on-disk
	99	* version upgrades.
	100	*/
	101
	102	/* Address of superblock in GFS2 basic blocks */
	103	#define GFS2_SB_ADDR 128
	104
	105	/* The lock number for the superblock (must be zero) */
	106	#define GFS2_SB_LOCK 0
	107
	108	/* Requirement: GFS2_LOCKNAME_LEN % 8 == 0
	109	Includes: the fencing zero at the end */
	110	#define GFS2_LOCKNAME_LEN 64
	111
	112	struct gfs2_sb {
	113	struct gfs2_meta_header sb_header;
	114
	115	__be32 sb_fs_format;
	116	__be32 sb_multihost_format;
	117	__u32 __pad0; /* Was superblock flags in gfs1 */
	118
	119	__be32 sb_bsize;
	120	__be32 sb_bsize_shift;
	121	__u32 __pad1; /* Was journal segment size in gfs1 */
	122
	123	struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */
	124	struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */
	125	struct gfs2_inum sb_root_dir;
	126
	127	char sb_lockproto[GFS2_LOCKNAME_LEN];
	128	char sb_locktable[GFS2_LOCKNAME_LEN];
6d80c39f SW	129
	130	struct gfs2_inum __pad3; /* Was quota inode in gfs1 */
	131	struct gfs2_inum __pad4; /* Was licence inode in gfs1 */
	132	#define GFS2_HAS_UUID 1
	133	__u8 sb_uuid[16]; /* The UUID, maybe 0 for backwards compat */
b3b94faa DT	134	};
	135
	136	/*
	137	* resource index structure
	138	*/
	139
	140	struct gfs2_rindex {
	141	__be64 ri_addr; /* grp block disk address */
	142	__be32 ri_length; /* length of rgrp header in fs blocks */
	143	__u32 __pad;
	144
	145	__be64 ri_data0; /* first data location */
	146	__be32 ri_data; /* num of data blocks in rgrp */
	147
	148	__be32 ri_bitbytes; /* number of bytes in data bitmaps */
	149
	150	__u8 ri_reserved[64];
	151	};
	152
	153	/*
	154	* resource group header structure
	155	*/
	156
	157	/* Number of blocks per byte in rgrp */
	158	#define GFS2_NBBY 4
	159	#define GFS2_BIT_SIZE 2
	160	#define GFS2_BIT_MASK 0x00000003
	161
	162	#define GFS2_BLKST_FREE 0
	163	#define GFS2_BLKST_USED 1
feaa7bba	164	#define GFS2_BLKST_UNLINKED 2
b3b94faa DT	165	#define GFS2_BLKST_DINODE 3
	166
	167	#define GFS2_RGF_JOURNAL 0x00000001
	168	#define GFS2_RGF_METAONLY 0x00000002
	169	#define GFS2_RGF_DATAONLY 0x00000004
	170	#define GFS2_RGF_NOALLOC 0x00000008
	171
	172	struct gfs2_rgrp {
	173	struct gfs2_meta_header rg_header;
	174
	175	__be32 rg_flags;
	176	__be32 rg_free;
	177	__be32 rg_dinodes;
4340fe62 SW	178	__be32 __pad;
4340fe62 SW	179	__be64 rg_igeneration;
b3b94faa	180
4340fe62	181	__u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */
b3b94faa DT	182	};
	183
	184	/*
	185	* quota structure
	186	*/
	187
	188	struct gfs2_quota {
	189	__be64 qu_limit;
	190	__be64 qu_warn;
	191	__be64 qu_value;
1ccaba30	192	__u8 qu_reserved[64];
b3b94faa DT	193	};
	194
	195	/*
	196	* dinode structure
	197	*/
	198
	199	#define GFS2_MAX_META_HEIGHT 10
	200	#define GFS2_DIR_MAX_DEPTH 17
	201
	202	#define DT2IF(dt) (((dt) << 12) & S_IFMT)
	203	#define IF2DT(sif) (((sif) & S_IFMT) >> 12)
	204
7ea9ea83 SW	205	enum {
	206	gfs2fl_Jdata = 0,
	207	gfs2fl_ExHash = 1,
	208	gfs2fl_Unused = 2,
	209	gfs2fl_EaIndirect = 3,
	210	gfs2fl_Directio = 4,
	211	gfs2fl_Immutable = 5,
	212	gfs2fl_AppendOnly = 6,
	213	gfs2fl_NoAtime = 7,
	214	gfs2fl_Sync = 8,
	215	gfs2fl_System = 9,
	216	gfs2fl_TruncInProg = 29,
	217	gfs2fl_InheritDirectio = 30,
	218	gfs2fl_InheritJdata = 31,
	219	};
	220
b3b94faa DT	221	/* Dinode flags */
	222	#define GFS2_DIF_JDATA 0x00000001
	223	#define GFS2_DIF_EXHASH 0x00000002
	224	#define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
	225	#define GFS2_DIF_EA_INDIRECT 0x00000008
	226	#define GFS2_DIF_DIRECTIO 0x00000010
	227	#define GFS2_DIF_IMMUTABLE 0x00000020
	228	#define GFS2_DIF_APPENDONLY 0x00000040
	229	#define GFS2_DIF_NOATIME 0x00000080
	230	#define GFS2_DIF_SYNC 0x00000100
	231	#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
	232	#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
	233	#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
	234	#define GFS2_DIF_INHERIT_JDATA 0x80000000
	235
	236	struct gfs2_dinode {
	237	struct gfs2_meta_header di_header;
	238
	239	struct gfs2_inum di_num;
	240
	241	__be32 di_mode; /* mode of file */
	242	__be32 di_uid; /* owner's user id */
	243	__be32 di_gid; /* owner's group id */
	244	__be32 di_nlink; /* number of links to this file */
	245	__be64 di_size; /* number of bytes in file */
	246	__be64 di_blocks; /* number of blocks in file */
	247	__be64 di_atime; /* time last accessed */
	248	__be64 di_mtime; /* time last modified */
	249	__be64 di_ctime; /* time last changed */
	250	__be32 di_major; /* device major number */
	251	__be32 di_minor; /* device minor number */
	252
	253	/* This section varies from gfs1. Padding added to align with
	254	* remainder of dinode
	255	*/
	256	__be64 di_goal_meta; /* rgrp to alloc from next */
	257	__be64 di_goal_data; /* data block goal */
4340fe62	258	__be64 di_generation; /* generation number for NFS */
b3b94faa DT	259
	260	__be32 di_flags; /* GFS2_DIF_... */
	261	__be32 di_payload_format; /* GFS2_FORMAT_... */
	262	__u16 __pad1; /* Was ditype in gfs1 */
	263	__be16 di_height; /* height of metadata */
	264	__u32 __pad2; /* Unused incarnation number from gfs1 */
	265
	266	/* These only apply to directories */
	267	__u16 __pad3; /* Padding */
	268	__be16 di_depth; /* Number of bits in the table */
	269	__be32 di_entries; /* The number of entries in the directory */
	270
	271	struct gfs2_inum __pad4; /* Unused even in current gfs1 */
	272
	273	__be64 di_eattr; /* extended attribute block number */
4bd91ba1 SW	274	__be32 di_atime_nsec; /* nsec portion of atime */
	275	__be32 di_mtime_nsec; /* nsec portion of mtime */
	276	__be32 di_ctime_nsec; /* nsec portion of ctime */
b3b94faa	277
4bd91ba1	278	__u8 di_reserved[44];
b3b94faa DT	279	};
	280
	281	/*
	282	* directory structure - many of these per directory file
	283	*/
	284
	285	#define GFS2_FNAMESIZE 255
	286	#define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)
	287
	288	struct gfs2_dirent {
	289	struct gfs2_inum de_inum;
	290	__be32 de_hash;
fc69d0d3 SW	291	__be16 de_rec_len;
	292	__be16 de_name_len;
	293	__be16 de_type;
	294	__u8 __pad[14];
b3b94faa DT	295	};
	296
	297	/*
	298	* Header of leaf directory nodes
	299	*/
	300
	301	struct gfs2_leaf {
	302	struct gfs2_meta_header lf_header;
	303
	304	__be16 lf_depth; /* Depth of leaf */
	305	__be16 lf_entries; /* Number of dirents in leaf */
	306	__be32 lf_dirent_format; /* Format of the dirents */
	307	__be64 lf_next; /* Next leaf, if overflow */
	308
fc69d0d3	309	__u8 lf_reserved[64];
b3b94faa DT	310	};
	311
	312	/*
	313	* Extended attribute header format
b6ed2e03 SW	314	*
	315	* This works in a similar way to dirents. There is a fixed size header
	316	* followed by a variable length section made up of the name and the
	317	* associated data. In the case of a "stuffed" entry, the value is
	318	* inline directly after the name, the ea_num_ptrs entry will be
	319	* zero in that case. For non-"stuffed" entries, there will be
	320	* a set of pointers (aligned to 8 byte boundary) to the block(s)
	321	* containing the value.
	322	*
	323	* The blocks containing the values and the blocks containing the
	324	* extended attribute headers themselves all start with the common
	325	* metadata header. Each inode, if it has extended attributes, will
	326	* have either a single block containing the extended attribute headers
	327	* or a single indirect block pointing to blocks containing the
	328	* extended attribure headers.
	329	*
	330	* The maximim size of the data part of an extended attribute is 64k
	331	* so the number of blocks required depends upon block size. Since the
	332	* block size also determines the number of pointers in an indirect
	333	* block, its a fairly complicated calculation to work out the maximum
	334	* number of blocks that an inode may have relating to extended attributes.
	335	*
b3b94faa DT	336	*/
	337
	338	#define GFS2_EA_MAX_NAME_LEN 255
	339	#define GFS2_EA_MAX_DATA_LEN 65536
	340
	341	#define GFS2_EATYPE_UNUSED 0
	342	#define GFS2_EATYPE_USR 1
	343	#define GFS2_EATYPE_SYS 2
639b6d79	344	#define GFS2_EATYPE_SECURITY 3
b3b94faa	345
639b6d79	346	#define GFS2_EATYPE_LAST 3
b3b94faa DT	347	#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)
	348
	349	#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */
	350
	351	struct gfs2_ea_header {
	352	__be32 ea_rec_len;
	353	__be32 ea_data_len;
	354	__u8 ea_name_len; /* no NULL pointer after the string */
	355	__u8 ea_type; /* GFS2_EATYPE_... */
	356	__u8 ea_flags; /* GFS2_EAFLAG_... */
	357	__u8 ea_num_ptrs;
	358	__u32 __pad;
	359	};
	360
	361	/*
	362	* Log header structure
	363	*/
	364
	365	#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */
	366
	367	struct gfs2_log_header {
	368	struct gfs2_meta_header lh_header;
	369
	370	__be64 lh_sequence; /* Sequence number of this transaction */
	371	__be32 lh_flags; /* GFS2_LOG_HEAD_... */
	372	__be32 lh_tail; /* Block number of log tail */
	373	__be32 lh_blkno;
	374	__be32 lh_hash;
	375	};
	376
	377	/*
	378	* Log type descriptor
	379	*/
	380
	381	#define GFS2_LOG_DESC_METADATA 300
	382	/* ld_data1 is the number of metadata blocks in the descriptor.
	383	ld_data2 is unused. */
	384
	385	#define GFS2_LOG_DESC_REVOKE 301
	386	/* ld_data1 is the number of revoke blocks in the descriptor.
	387	ld_data2 is unused. */
	388
18ec7d5c SW	389	#define GFS2_LOG_DESC_JDATA 302
	390	/* ld_data1 is the number of data blocks in the descriptor.
	391	ld_data2 is unused. */
	392
b3b94faa DT	393	struct gfs2_log_descriptor {
	394	struct gfs2_meta_header ld_header;
	395
	396	__be32 ld_type; /* GFS2_LOG_DESC_... */
	397	__be32 ld_length; /* Number of buffers in this chunk */
	398	__be32 ld_data1; /* descriptor-specific field */
	399	__be32 ld_data2; /* descriptor-specific field */
	400
	401	__u8 ld_reserved[32];
	402	};
	403
	404	/*
	405	* Inum Range
	406	* Describe a range of formal inode numbers allocated to
	407	* one machine to assign to inodes.
	408	*/
	409
	410	#define GFS2_INUM_QUANTUM 1048576
	411
	412	struct gfs2_inum_range {
	413	__be64 ir_start;
	414	__be64 ir_length;
	415	};
	416
	417	/*
	418	* Statfs change
	419	* Describes an change to the pool of free and allocated
	420	* blocks.
	421	*/
	422
	423	struct gfs2_statfs_change {
	424	__be64 sc_total;
	425	__be64 sc_free;
	426	__be64 sc_dinodes;
	427	};
	428
b3b94faa DT	429	/*
	430	* Quota change
	431	* Describes an allocation change for a particular
	432	* user or group.
	433	*/
	434
	435	#define GFS2_QCF_USER 0x00000001
	436
	437	struct gfs2_quota_change {
	438	__be64 qc_change;
	439	__be32 qc_flags; /* GFS2_QCF_... */
	440	__be32 qc_id;
	441	};
	442
2a87ab08 AD	443	struct gfs2_quota_lvb {
2a87ab08 AD	444	__be32 qb_magic;
518bbde3	445	__u32 __pad;
2a87ab08 AD	446	__be64 qb_limit; /* Hard limit of # blocks to alloc */
	447	__be64 qb_warn; /* Warn user when alloc is above this # */
	448	__be64 qb_value; /* Current # blocks allocated */
	449	};
	450
b3b94faa	451	#endif /* __GFS2_ONDISK_DOT_H__ */