[linux-2.6-block.git] / include / uapi / linux / gfs2_ondisk.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * 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_FREEZE_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
#define GFS2_RGF_TRIMMED	0x00000010

struct gfs2_rgrp_lvb {
	__be32 rl_magic;
	__be32 rl_flags;
	__be32 rl_free;
	__be32 rl_dinodes;
	__be64 rl_igeneration;
	__be32 rl_unlinked;
	__be32 __pad;
};

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_TopLevel		= 10,
	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_TOPDIR			0x00000400 /* New in gfs2 */
#define GFS2_DIF_TRUNC_IN_PROG		0x20000000 /* New in gfs2 */
#define GFS2_DIF_INHERIT_DIRECTIO	0x40000000 /* only in gfs1 */
#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)
#define GFS2_MIN_DIRENT_SIZE (GFS2_DIRENT_SIZE(1))


struct gfs2_dirent {
	struct gfs2_inum de_inum;
	__be32 de_hash;
	__be16 de_rec_len;
	__be16 de_name_len;
	__be16 de_type;
	__be16 de_rahead;
	union {
		__u8 __pad[12];
		struct {
			__u32 de_cookie; /* ondisk value not used */
			__u8 pad3[8];
		};
	};
};

/*
 * 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 */

	union {
		__u8 lf_reserved[64];
		struct {
			__be64 lf_inode;	/* Dir inode number */
			__be32 lf_dist;		/* Dist from inode on chain */
			__be32 lf_nsec;		/* Last ins/del usecs */
			__be64 lf_sec;		/* Last ins/del in secs */
			__u8 lf_reserved2[40];
		};
	};
};

/*
 * 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 attribute headers.
 *
 * The maximum 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
e2be04c7	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
b3b94faa	2	/*
feaa7bba SW	3	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	4	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
	5	*
	6	* This copyrighted material is made available to anyone wishing to use,
	7	* modify, copy, or redistribute it subject to the terms and conditions
	8	* of the GNU General Public License v.2.
	9	*/
b3b94faa DT	10
	11	#ifndef __GFS2_ONDISK_DOT_H__
	12	#define __GFS2_ONDISK_DOT_H__
	13
237416fe JSR	14	#include <linux/types.h>
237416fe JSR	15
b3b94faa DT	16	#define GFS2_MAGIC 0x01161970
	17	#define GFS2_BASIC_BLOCK 512
	18	#define GFS2_BASIC_BLOCK_SHIFT 9
	19
	20	/* Lock numbers of the LM_TYPE_NONDISK type */
	21
	22	#define GFS2_MOUNT_LOCK 0
	23	#define GFS2_LIVE_LOCK 1
24972557	24	#define GFS2_FREEZE_LOCK 2
b3b94faa	25	#define GFS2_RENAME_LOCK 3
e0c2a9aa DT	26	#define GFS2_CONTROL_LOCK 4
e0c2a9aa DT	27	#define GFS2_MOUNTED_LOCK 5
b3b94faa DT	28
	29	/* Format numbers for various metadata types */
	30
	31	#define GFS2_FORMAT_NONE 0
	32	#define GFS2_FORMAT_SB 100
	33	#define GFS2_FORMAT_RG 200
	34	#define GFS2_FORMAT_RB 300
	35	#define GFS2_FORMAT_DI 400
	36	#define GFS2_FORMAT_IN 500
	37	#define GFS2_FORMAT_LF 600
	38	#define GFS2_FORMAT_JD 700
	39	#define GFS2_FORMAT_LH 800
	40	#define GFS2_FORMAT_LD 900
	41	#define GFS2_FORMAT_LB 1000
fc69d0d3 SW	42	#define GFS2_FORMAT_EA 1600
fc69d0d3 SW	43	#define GFS2_FORMAT_ED 1700
b3b94faa DT	44	#define GFS2_FORMAT_QC 1400
b3b94faa DT	45	/* These are format numbers for entities contained in files */
fc69d0d3 SW	46	#define GFS2_FORMAT_RI 1100
	47	#define GFS2_FORMAT_DE 1200
	48	#define GFS2_FORMAT_QU 1500
b3b94faa DT	49	/* These are part of the superblock */
	50	#define GFS2_FORMAT_FS 1801
	51	#define GFS2_FORMAT_MULTI 1900
	52
	53	/*
	54	* An on-disk inode number
	55	*/
	56
b3b94faa DT	57	struct gfs2_inum {
	58	__be64 no_formal_ino;
	59	__be64 no_addr;
	60	};
	61
	62	/*
	63	* Generic metadata head structure
	64	* Every inplace buffer logged in the journal must start with this.
	65	*/
	66
	67	#define GFS2_METATYPE_NONE 0
	68	#define GFS2_METATYPE_SB 1
	69	#define GFS2_METATYPE_RG 2
	70	#define GFS2_METATYPE_RB 3
	71	#define GFS2_METATYPE_DI 4
	72	#define GFS2_METATYPE_IN 5
	73	#define GFS2_METATYPE_LF 6
	74	#define GFS2_METATYPE_JD 7
	75	#define GFS2_METATYPE_LH 8
	76	#define GFS2_METATYPE_LD 9
fc69d0d3 SW	77	#define GFS2_METATYPE_LB 12
	78	#define GFS2_METATYPE_EA 10
	79	#define GFS2_METATYPE_ED 11
b3b94faa DT	80	#define GFS2_METATYPE_QC 14
	81
	82	struct gfs2_meta_header {
	83	__be32 mh_magic;
	84	__be32 mh_type;
	85	__be64 __pad0; /* Was generation number in gfs1 */
	86	__be32 mh_format;
0ab7d13f SW	87	/* This union is to keep userspace happy */
	88	union {
	89	__be32 mh_jid; /* Was incarnation number in gfs1 */
	90	__be32 __pad1;
	91	};
b3b94faa DT	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];
6d80c39f SW	130
	131	struct gfs2_inum __pad3; /* Was quota inode in gfs1 */
	132	struct gfs2_inum __pad4; /* Was licence inode in gfs1 */
	133	#define GFS2_HAS_UUID 1
	134	__u8 sb_uuid[16]; /* The UUID, maybe 0 for backwards compat */
b3b94faa DT	135	};
	136
	137	/*
	138	* resource index structure
	139	*/
	140
	141	struct gfs2_rindex {
	142	__be64 ri_addr; /* grp block disk address */
	143	__be32 ri_length; /* length of rgrp header in fs blocks */
	144	__u32 __pad;
	145
	146	__be64 ri_data0; /* first data location */
	147	__be32 ri_data; /* num of data blocks in rgrp */
	148
	149	__be32 ri_bitbytes; /* number of bytes in data bitmaps */
	150
	151	__u8 ri_reserved[64];
	152	};
	153
	154	/*
	155	* resource group header structure
	156	*/
	157
	158	/* Number of blocks per byte in rgrp */
	159	#define GFS2_NBBY 4
	160	#define GFS2_BIT_SIZE 2
	161	#define GFS2_BIT_MASK 0x00000003
	162
	163	#define GFS2_BLKST_FREE 0
	164	#define GFS2_BLKST_USED 1
feaa7bba	165	#define GFS2_BLKST_UNLINKED 2
b3b94faa DT	166	#define GFS2_BLKST_DINODE 3
	167
	168	#define GFS2_RGF_JOURNAL 0x00000001
	169	#define GFS2_RGF_METAONLY 0x00000002
	170	#define GFS2_RGF_DATAONLY 0x00000004
	171	#define GFS2_RGF_NOALLOC 0x00000008
66fc061b	172	#define GFS2_RGF_TRIMMED 0x00000010
b3b94faa	173
90306c41 BM	174	struct gfs2_rgrp_lvb {
	175	__be32 rl_magic;
	176	__be32 rl_flags;
	177	__be32 rl_free;
	178	__be32 rl_dinodes;
	179	__be64 rl_igeneration;
	180	__be32 rl_unlinked;
	181	__be32 __pad;
	182	};
	183
b3b94faa DT	184	struct gfs2_rgrp {
	185	struct gfs2_meta_header rg_header;
	186
	187	__be32 rg_flags;
	188	__be32 rg_free;
	189	__be32 rg_dinodes;
4340fe62 SW	190	__be32 __pad;
4340fe62 SW	191	__be64 rg_igeneration;
b3b94faa	192
4340fe62	193	__u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */
b3b94faa DT	194	};
	195
	196	/*
	197	* quota structure
	198	*/
	199
	200	struct gfs2_quota {
	201	__be64 qu_limit;
	202	__be64 qu_warn;
	203	__be64 qu_value;
1ccaba30	204	__u8 qu_reserved[64];
b3b94faa DT	205	};
	206
	207	/*
	208	* dinode structure
	209	*/
	210
	211	#define GFS2_MAX_META_HEIGHT 10
	212	#define GFS2_DIR_MAX_DEPTH 17
	213
	214	#define DT2IF(dt) (((dt) << 12) & S_IFMT)
	215	#define IF2DT(sif) (((sif) & S_IFMT) >> 12)
	216
7ea9ea83 SW	217	enum {
	218	gfs2fl_Jdata = 0,
	219	gfs2fl_ExHash = 1,
	220	gfs2fl_Unused = 2,
	221	gfs2fl_EaIndirect = 3,
	222	gfs2fl_Directio = 4,
	223	gfs2fl_Immutable = 5,
	224	gfs2fl_AppendOnly = 6,
	225	gfs2fl_NoAtime = 7,
	226	gfs2fl_Sync = 8,
	227	gfs2fl_System = 9,
23d0bb83	228	gfs2fl_TopLevel = 10,
7ea9ea83 SW	229	gfs2fl_TruncInProg = 29,
	230	gfs2fl_InheritDirectio = 30,
	231	gfs2fl_InheritJdata = 31,
	232	};
	233
b3b94faa DT	234	/* Dinode flags */
	235	#define GFS2_DIF_JDATA 0x00000001
	236	#define GFS2_DIF_EXHASH 0x00000002
	237	#define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
	238	#define GFS2_DIF_EA_INDIRECT 0x00000008
	239	#define GFS2_DIF_DIRECTIO 0x00000010
	240	#define GFS2_DIF_IMMUTABLE 0x00000020
	241	#define GFS2_DIF_APPENDONLY 0x00000040
	242	#define GFS2_DIF_NOATIME 0x00000080
	243	#define GFS2_DIF_SYNC 0x00000100
	244	#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
23d0bb83	245	#define GFS2_DIF_TOPDIR 0x00000400 /* New in gfs2 */
b3b94faa	246	#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
23d0bb83	247	#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 /* only in gfs1 */
b3b94faa DT	248	#define GFS2_DIF_INHERIT_JDATA 0x80000000
	249
	250	struct gfs2_dinode {
	251	struct gfs2_meta_header di_header;
	252
	253	struct gfs2_inum di_num;
	254
	255	__be32 di_mode; /* mode of file */
	256	__be32 di_uid; /* owner's user id */
	257	__be32 di_gid; /* owner's group id */
	258	__be32 di_nlink; /* number of links to this file */
	259	__be64 di_size; /* number of bytes in file */
	260	__be64 di_blocks; /* number of blocks in file */
	261	__be64 di_atime; /* time last accessed */
	262	__be64 di_mtime; /* time last modified */
	263	__be64 di_ctime; /* time last changed */
	264	__be32 di_major; /* device major number */
	265	__be32 di_minor; /* device minor number */
	266
	267	/* This section varies from gfs1. Padding added to align with
	268	* remainder of dinode
	269	*/
	270	__be64 di_goal_meta; /* rgrp to alloc from next */
	271	__be64 di_goal_data; /* data block goal */
4340fe62	272	__be64 di_generation; /* generation number for NFS */
b3b94faa DT	273
	274	__be32 di_flags; /* GFS2_DIF_... */
	275	__be32 di_payload_format; /* GFS2_FORMAT_... */
	276	__u16 __pad1; /* Was ditype in gfs1 */
	277	__be16 di_height; /* height of metadata */
	278	__u32 __pad2; /* Unused incarnation number from gfs1 */
	279
	280	/* These only apply to directories */
	281	__u16 __pad3; /* Padding */
	282	__be16 di_depth; /* Number of bits in the table */
	283	__be32 di_entries; /* The number of entries in the directory */
	284
	285	struct gfs2_inum __pad4; /* Unused even in current gfs1 */
	286
	287	__be64 di_eattr; /* extended attribute block number */
4bd91ba1 SW	288	__be32 di_atime_nsec; /* nsec portion of atime */
	289	__be32 di_mtime_nsec; /* nsec portion of mtime */
	290	__be32 di_ctime_nsec; /* nsec portion of ctime */
b3b94faa	291
4bd91ba1	292	__u8 di_reserved[44];
b3b94faa DT	293	};
	294
	295	/*
	296	* directory structure - many of these per directory file
	297	*/
	298
	299	#define GFS2_FNAMESIZE 255
	300	#define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)
471f3db2 BM	301	#define GFS2_MIN_DIRENT_SIZE (GFS2_DIRENT_SIZE(1))
471f3db2 BM	302
b3b94faa DT	303
	304	struct gfs2_dirent {
	305	struct gfs2_inum de_inum;
	306	__be32 de_hash;
fc69d0d3 SW	307	__be16 de_rec_len;
	308	__be16 de_name_len;
	309	__be16 de_type;
471f3db2	310	__be16 de_rahead;
44aaada9	311	union {
471f3db2	312	__u8 __pad[12];
44aaada9	313	struct {
471f3db2 BM	314	__u32 de_cookie; /* ondisk value not used */
471f3db2 BM	315	__u8 pad3[8];
44aaada9 SW	316	};
44aaada9 SW	317	};
b3b94faa DT	318	};
	319
	320	/*
	321	* Header of leaf directory nodes
	322	*/
	323
	324	struct gfs2_leaf {
	325	struct gfs2_meta_header lf_header;
	326
	327	__be16 lf_depth; /* Depth of leaf */
	328	__be16 lf_entries; /* Number of dirents in leaf */
	329	__be32 lf_dirent_format; /* Format of the dirents */
	330	__be64 lf_next; /* Next leaf, if overflow */
	331
01bcb0de SW	332	union {
	333	__u8 lf_reserved[64];
	334	struct {
	335	__be64 lf_inode; /* Dir inode number */
	336	__be32 lf_dist; /* Dist from inode on chain */
	337	__be32 lf_nsec; /* Last ins/del usecs */
	338	__be64 lf_sec; /* Last ins/del in secs */
	339	__u8 lf_reserved2[40];
	340	};
	341	};
b3b94faa DT	342	};
	343
	344	/*
	345	* Extended attribute header format
b6ed2e03 SW	346	*
	347	* This works in a similar way to dirents. There is a fixed size header
	348	* followed by a variable length section made up of the name and the
	349	* associated data. In the case of a "stuffed" entry, the value is
	350	* inline directly after the name, the ea_num_ptrs entry will be
	351	* zero in that case. For non-"stuffed" entries, there will be
	352	* a set of pointers (aligned to 8 byte boundary) to the block(s)
	353	* containing the value.
	354	*
	355	* The blocks containing the values and the blocks containing the
	356	* extended attribute headers themselves all start with the common
	357	* metadata header. Each inode, if it has extended attributes, will
	358	* have either a single block containing the extended attribute headers
	359	* or a single indirect block pointing to blocks containing the
b2c8b3ea	360	* extended attribute headers.
b6ed2e03	361	*
b2c8b3ea	362	* The maximum size of the data part of an extended attribute is 64k
b6ed2e03 SW	363	* so the number of blocks required depends upon block size. Since the
	364	* block size also determines the number of pointers in an indirect
	365	* block, its a fairly complicated calculation to work out the maximum
	366	* number of blocks that an inode may have relating to extended attributes.
	367	*
b3b94faa DT	368	*/
	369
	370	#define GFS2_EA_MAX_NAME_LEN 255
	371	#define GFS2_EA_MAX_DATA_LEN 65536
	372
	373	#define GFS2_EATYPE_UNUSED 0
	374	#define GFS2_EATYPE_USR 1
	375	#define GFS2_EATYPE_SYS 2
639b6d79	376	#define GFS2_EATYPE_SECURITY 3
b3b94faa	377
639b6d79	378	#define GFS2_EATYPE_LAST 3
b3b94faa DT	379	#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)
	380
	381	#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */
	382
	383	struct gfs2_ea_header {
	384	__be32 ea_rec_len;
	385	__be32 ea_data_len;
	386	__u8 ea_name_len; /* no NULL pointer after the string */
	387	__u8 ea_type; /* GFS2_EATYPE_... */
	388	__u8 ea_flags; /* GFS2_EAFLAG_... */
	389	__u8 ea_num_ptrs;
	390	__u32 __pad;
	391	};
	392
	393	/*
	394	* Log header structure
	395	*/
	396
	397	#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */
	398
	399	struct gfs2_log_header {
	400	struct gfs2_meta_header lh_header;
	401
	402	__be64 lh_sequence; /* Sequence number of this transaction */
	403	__be32 lh_flags; /* GFS2_LOG_HEAD_... */
	404	__be32 lh_tail; /* Block number of log tail */
	405	__be32 lh_blkno;
	406	__be32 lh_hash;
	407	};
	408
	409	/*
	410	* Log type descriptor
	411	*/
	412
	413	#define GFS2_LOG_DESC_METADATA 300
	414	/* ld_data1 is the number of metadata blocks in the descriptor.
	415	ld_data2 is unused. */
	416
	417	#define GFS2_LOG_DESC_REVOKE 301
	418	/* ld_data1 is the number of revoke blocks in the descriptor.
	419	ld_data2 is unused. */
	420
18ec7d5c SW	421	#define GFS2_LOG_DESC_JDATA 302
	422	/* ld_data1 is the number of data blocks in the descriptor.
	423	ld_data2 is unused. */
	424
b3b94faa DT	425	struct gfs2_log_descriptor {
	426	struct gfs2_meta_header ld_header;
	427
	428	__be32 ld_type; /* GFS2_LOG_DESC_... */
	429	__be32 ld_length; /* Number of buffers in this chunk */
	430	__be32 ld_data1; /* descriptor-specific field */
	431	__be32 ld_data2; /* descriptor-specific field */
	432
	433	__u8 ld_reserved[32];
	434	};
	435
	436	/*
	437	* Inum Range
	438	* Describe a range of formal inode numbers allocated to
	439	* one machine to assign to inodes.
	440	*/
	441
	442	#define GFS2_INUM_QUANTUM 1048576
	443
	444	struct gfs2_inum_range {
	445	__be64 ir_start;
	446	__be64 ir_length;
	447	};
	448
	449	/*
	450	* Statfs change
	451	* Describes an change to the pool of free and allocated
	452	* blocks.
	453	*/
	454
	455	struct gfs2_statfs_change {
	456	__be64 sc_total;
	457	__be64 sc_free;
	458	__be64 sc_dinodes;
	459	};
	460
b3b94faa DT	461	/*
	462	* Quota change
	463	* Describes an allocation change for a particular
	464	* user or group.
	465	*/
	466
	467	#define GFS2_QCF_USER 0x00000001
	468
	469	struct gfs2_quota_change {
	470	__be64 qc_change;
	471	__be32 qc_flags; /* GFS2_QCF_... */
	472	__be32 qc_id;
	473	};
	474
2a87ab08 AD	475	struct gfs2_quota_lvb {
2a87ab08 AD	476	__be32 qb_magic;
518bbde3	477	__u32 __pad;
2a87ab08 AD	478	__be64 qb_limit; /* Hard limit of # blocks to alloc */
	479	__be64 qb_warn; /* Warn user when alloc is above this # */
	480	__be64 qb_value; /* Current # blocks allocated */
	481	};
	482
b3b94faa	483	#endif /* __GFS2_ONDISK_DOT_H__ */