[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;
	union {
		__be32 __pad;
		__be32 rg_skip; /* Distance to the next rgrp in fs blocks */
	};
	__be64 rg_igeneration;
	/* The following 3 fields are duplicated from gfs2_rindex to reduce
	   reliance on the rindex */
	__be64 rg_data0;     /* First data location */
	__be32 rg_data;      /* Number of data blocks in rgrp */
	__be32 rg_bitbytes;  /* Number of bytes in data bitmaps */
	__be32 rg_crc;       /* crc32 of the structure with this field 0 */

	__u8 rg_reserved[60]; /* 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 */
#define GFS2_LOG_HEAD_FLUSH_NORMAL	0x00000002 /* normal log flush */
#define GFS2_LOG_HEAD_FLUSH_SYNC	0x00000004 /* Sync log flush */
#define GFS2_LOG_HEAD_FLUSH_SHUTDOWN	0x00000008 /* Shutdown log flush */
#define GFS2_LOG_HEAD_FLUSH_FREEZE	0x00000010 /* Freeze flush */
#define GFS2_LOG_HEAD_RECOVERY		0x00000020 /* Journal recovery */
#define GFS2_LOG_HEAD_USERSPACE		0x80000000 /* Written by gfs2-utils */

/* Log flush callers */
#define GFS2_LFC_SHUTDOWN		0x00000100
#define GFS2_LFC_JDATA_WPAGES		0x00000200
#define GFS2_LFC_SET_FLAGS		0x00000400
#define GFS2_LFC_AIL_EMPTY_GL		0x00000800
#define GFS2_LFC_AIL_FLUSH		0x00001000
#define GFS2_LFC_RGRP_GO_SYNC		0x00002000
#define GFS2_LFC_INODE_GO_SYNC		0x00004000
#define GFS2_LFC_INODE_GO_INVAL		0x00008000
#define GFS2_LFC_FREEZE_GO_SYNC		0x00010000
#define GFS2_LFC_KILL_SB		0x00020000
#define GFS2_LFC_DO_SYNC		0x00040000
#define GFS2_LFC_INPLACE_RESERVE	0x00080000
#define GFS2_LFC_WRITE_INODE		0x00100000
#define GFS2_LFC_MAKE_FS_RO		0x00200000
#define GFS2_LFC_SYNC_FS		0x00400000
#define GFS2_LFC_EVICT_INODE		0x00800000
#define GFS2_LFC_TRANS_END		0x01000000
#define GFS2_LFC_LOGD_JFLUSH_REQD	0x02000000
#define GFS2_LFC_LOGD_AIL_FLUSH_REQD	0x04000000

#define LH_V1_SIZE (offsetofend(struct gfs2_log_header, lh_hash))

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;		/* crc up to here with this field 0 */

	/* Version 2 additional fields start here */
	__be32 lh_crc;		/* crc32c from lh_nsec to end of block */
	__be32 lh_nsec;		/* Nanoseconds of timestamp */
	__be64 lh_sec;		/* Seconds of timestamp */
	__be64 lh_addr;		/* Block addr of this log header (absolute) */
	__be64 lh_jinode;	/* Journal inode number */
	__be64 lh_statfs_addr;	/* Local statfs inode number */
	__be64 lh_quota_addr;	/* Local quota change inode number */

	/* Statfs local changes (i.e. diff from global statfs) */
	__be64 lh_local_total;
	__be64 lh_local_free;
	__be64 lh_local_dinodes;
};

/*
 * 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;
65adc273 AP	190	union {
	191	__be32 __pad;
	192	__be32 rg_skip; /* Distance to the next rgrp in fs blocks */
	193	};
4340fe62	194	__be64 rg_igeneration;
166725d9 AP	195	/* The following 3 fields are duplicated from gfs2_rindex to reduce
	196	reliance on the rindex */
	197	__be64 rg_data0; /* First data location */
	198	__be32 rg_data; /* Number of data blocks in rgrp */
	199	__be32 rg_bitbytes; /* Number of bytes in data bitmaps */
850d2d91	200	__be32 rg_crc; /* crc32 of the structure with this field 0 */
b3b94faa	201
850d2d91	202	__u8 rg_reserved[60]; /* Several fields from gfs1 now reserved */
b3b94faa DT	203	};
	204
	205	/*
	206	* quota structure
	207	*/
	208
	209	struct gfs2_quota {
	210	__be64 qu_limit;
	211	__be64 qu_warn;
	212	__be64 qu_value;
1ccaba30	213	__u8 qu_reserved[64];
b3b94faa DT	214	};
	215
	216	/*
	217	* dinode structure
	218	*/
	219
	220	#define GFS2_MAX_META_HEIGHT 10
	221	#define GFS2_DIR_MAX_DEPTH 17
	222
	223	#define DT2IF(dt) (((dt) << 12) & S_IFMT)
	224	#define IF2DT(sif) (((sif) & S_IFMT) >> 12)
	225
7ea9ea83 SW	226	enum {
	227	gfs2fl_Jdata = 0,
	228	gfs2fl_ExHash = 1,
	229	gfs2fl_Unused = 2,
	230	gfs2fl_EaIndirect = 3,
	231	gfs2fl_Directio = 4,
	232	gfs2fl_Immutable = 5,
	233	gfs2fl_AppendOnly = 6,
	234	gfs2fl_NoAtime = 7,
	235	gfs2fl_Sync = 8,
	236	gfs2fl_System = 9,
23d0bb83	237	gfs2fl_TopLevel = 10,
7ea9ea83 SW	238	gfs2fl_TruncInProg = 29,
	239	gfs2fl_InheritDirectio = 30,
	240	gfs2fl_InheritJdata = 31,
	241	};
	242
b3b94faa DT	243	/* Dinode flags */
	244	#define GFS2_DIF_JDATA 0x00000001
	245	#define GFS2_DIF_EXHASH 0x00000002
	246	#define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
	247	#define GFS2_DIF_EA_INDIRECT 0x00000008
	248	#define GFS2_DIF_DIRECTIO 0x00000010
	249	#define GFS2_DIF_IMMUTABLE 0x00000020
	250	#define GFS2_DIF_APPENDONLY 0x00000040
	251	#define GFS2_DIF_NOATIME 0x00000080
	252	#define GFS2_DIF_SYNC 0x00000100
	253	#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
23d0bb83	254	#define GFS2_DIF_TOPDIR 0x00000400 /* New in gfs2 */
b3b94faa	255	#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
23d0bb83	256	#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 /* only in gfs1 */
b3b94faa DT	257	#define GFS2_DIF_INHERIT_JDATA 0x80000000
	258
	259	struct gfs2_dinode {
	260	struct gfs2_meta_header di_header;
	261
	262	struct gfs2_inum di_num;
	263
	264	__be32 di_mode; /* mode of file */
	265	__be32 di_uid; /* owner's user id */
	266	__be32 di_gid; /* owner's group id */
	267	__be32 di_nlink; /* number of links to this file */
	268	__be64 di_size; /* number of bytes in file */
	269	__be64 di_blocks; /* number of blocks in file */
	270	__be64 di_atime; /* time last accessed */
	271	__be64 di_mtime; /* time last modified */
	272	__be64 di_ctime; /* time last changed */
	273	__be32 di_major; /* device major number */
	274	__be32 di_minor; /* device minor number */
	275
	276	/* This section varies from gfs1. Padding added to align with
	277	* remainder of dinode
	278	*/
	279	__be64 di_goal_meta; /* rgrp to alloc from next */
	280	__be64 di_goal_data; /* data block goal */
4340fe62	281	__be64 di_generation; /* generation number for NFS */
b3b94faa DT	282
	283	__be32 di_flags; /* GFS2_DIF_... */
	284	__be32 di_payload_format; /* GFS2_FORMAT_... */
	285	__u16 __pad1; /* Was ditype in gfs1 */
	286	__be16 di_height; /* height of metadata */
	287	__u32 __pad2; /* Unused incarnation number from gfs1 */
	288
	289	/* These only apply to directories */
	290	__u16 __pad3; /* Padding */
	291	__be16 di_depth; /* Number of bits in the table */
	292	__be32 di_entries; /* The number of entries in the directory */
	293
	294	struct gfs2_inum __pad4; /* Unused even in current gfs1 */
	295
	296	__be64 di_eattr; /* extended attribute block number */
4bd91ba1 SW	297	__be32 di_atime_nsec; /* nsec portion of atime */
	298	__be32 di_mtime_nsec; /* nsec portion of mtime */
	299	__be32 di_ctime_nsec; /* nsec portion of ctime */
b3b94faa	300
4bd91ba1	301	__u8 di_reserved[44];
b3b94faa DT	302	};
	303
	304	/*
	305	* directory structure - many of these per directory file
	306	*/
	307
	308	#define GFS2_FNAMESIZE 255
	309	#define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)
471f3db2 BM	310	#define GFS2_MIN_DIRENT_SIZE (GFS2_DIRENT_SIZE(1))
471f3db2 BM	311
b3b94faa DT	312
	313	struct gfs2_dirent {
	314	struct gfs2_inum de_inum;
	315	__be32 de_hash;
fc69d0d3 SW	316	__be16 de_rec_len;
	317	__be16 de_name_len;
	318	__be16 de_type;
471f3db2	319	__be16 de_rahead;
44aaada9	320	union {
471f3db2	321	__u8 __pad[12];
44aaada9	322	struct {
471f3db2 BM	323	__u32 de_cookie; /* ondisk value not used */
471f3db2 BM	324	__u8 pad3[8];
44aaada9 SW	325	};
44aaada9 SW	326	};
b3b94faa DT	327	};
	328
	329	/*
	330	* Header of leaf directory nodes
	331	*/
	332
	333	struct gfs2_leaf {
	334	struct gfs2_meta_header lf_header;
	335
	336	__be16 lf_depth; /* Depth of leaf */
	337	__be16 lf_entries; /* Number of dirents in leaf */
	338	__be32 lf_dirent_format; /* Format of the dirents */
	339	__be64 lf_next; /* Next leaf, if overflow */
	340
01bcb0de SW	341	union {
	342	__u8 lf_reserved[64];
	343	struct {
	344	__be64 lf_inode; /* Dir inode number */
	345	__be32 lf_dist; /* Dist from inode on chain */
	346	__be32 lf_nsec; /* Last ins/del usecs */
	347	__be64 lf_sec; /* Last ins/del in secs */
	348	__u8 lf_reserved2[40];
	349	};
	350	};
b3b94faa DT	351	};
	352
	353	/*
	354	* Extended attribute header format
b6ed2e03 SW	355	*
	356	* This works in a similar way to dirents. There is a fixed size header
	357	* followed by a variable length section made up of the name and the
	358	* associated data. In the case of a "stuffed" entry, the value is
	359	* inline directly after the name, the ea_num_ptrs entry will be
	360	* zero in that case. For non-"stuffed" entries, there will be
	361	* a set of pointers (aligned to 8 byte boundary) to the block(s)
	362	* containing the value.
	363	*
	364	* The blocks containing the values and the blocks containing the
	365	* extended attribute headers themselves all start with the common
	366	* metadata header. Each inode, if it has extended attributes, will
	367	* have either a single block containing the extended attribute headers
	368	* or a single indirect block pointing to blocks containing the
b2c8b3ea	369	* extended attribute headers.
b6ed2e03	370	*
b2c8b3ea	371	* The maximum size of the data part of an extended attribute is 64k
b6ed2e03 SW	372	* so the number of blocks required depends upon block size. Since the
	373	* block size also determines the number of pointers in an indirect
	374	* block, its a fairly complicated calculation to work out the maximum
	375	* number of blocks that an inode may have relating to extended attributes.
	376	*
b3b94faa DT	377	*/
	378
	379	#define GFS2_EA_MAX_NAME_LEN 255
	380	#define GFS2_EA_MAX_DATA_LEN 65536
	381
	382	#define GFS2_EATYPE_UNUSED 0
	383	#define GFS2_EATYPE_USR 1
	384	#define GFS2_EATYPE_SYS 2
639b6d79	385	#define GFS2_EATYPE_SECURITY 3
b3b94faa	386
639b6d79	387	#define GFS2_EATYPE_LAST 3
b3b94faa DT	388	#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)
	389
	390	#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */
	391
	392	struct gfs2_ea_header {
	393	__be32 ea_rec_len;
	394	__be32 ea_data_len;
	395	__u8 ea_name_len; /* no NULL pointer after the string */
	396	__u8 ea_type; /* GFS2_EATYPE_... */
	397	__u8 ea_flags; /* GFS2_EAFLAG_... */
	398	__u8 ea_num_ptrs;
	399	__u32 __pad;
	400	};
	401
	402	/*
	403	* Log header structure
	404	*/
	405
c1696fb8 BP	406	#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */
	407	#define GFS2_LOG_HEAD_FLUSH_NORMAL 0x00000002 /* normal log flush */
	408	#define GFS2_LOG_HEAD_FLUSH_SYNC 0x00000004 /* Sync log flush */
	409	#define GFS2_LOG_HEAD_FLUSH_SHUTDOWN 0x00000008 /* Shutdown log flush */
	410	#define GFS2_LOG_HEAD_FLUSH_FREEZE 0x00000010 /* Freeze flush */
	411	#define GFS2_LOG_HEAD_RECOVERY 0x00000020 /* Journal recovery */
	412	#define GFS2_LOG_HEAD_USERSPACE 0x80000000 /* Written by gfs2-utils */
	413
805c0907 BP	414	/* Log flush callers */
	415	#define GFS2_LFC_SHUTDOWN 0x00000100
	416	#define GFS2_LFC_JDATA_WPAGES 0x00000200
	417	#define GFS2_LFC_SET_FLAGS 0x00000400
	418	#define GFS2_LFC_AIL_EMPTY_GL 0x00000800
	419	#define GFS2_LFC_AIL_FLUSH 0x00001000
	420	#define GFS2_LFC_RGRP_GO_SYNC 0x00002000
	421	#define GFS2_LFC_INODE_GO_SYNC 0x00004000
	422	#define GFS2_LFC_INODE_GO_INVAL 0x00008000
	423	#define GFS2_LFC_FREEZE_GO_SYNC 0x00010000
	424	#define GFS2_LFC_KILL_SB 0x00020000
	425	#define GFS2_LFC_DO_SYNC 0x00040000
	426	#define GFS2_LFC_INPLACE_RESERVE 0x00080000
	427	#define GFS2_LFC_WRITE_INODE 0x00100000
	428	#define GFS2_LFC_MAKE_FS_RO 0x00200000
	429	#define GFS2_LFC_SYNC_FS 0x00400000
	430	#define GFS2_LFC_EVICT_INODE 0x00800000
	431	#define GFS2_LFC_TRANS_END 0x01000000
	432	#define GFS2_LFC_LOGD_JFLUSH_REQD 0x02000000
	433	#define GFS2_LFC_LOGD_AIL_FLUSH_REQD 0x04000000
	434
c1696fb8	435	#define LH_V1_SIZE (offsetofend(struct gfs2_log_header, lh_hash))
b3b94faa DT	436
	437	struct gfs2_log_header {
	438	struct gfs2_meta_header lh_header;
	439
	440	__be64 lh_sequence; /* Sequence number of this transaction */
	441	__be32 lh_flags; /* GFS2_LOG_HEAD_... */
	442	__be32 lh_tail; /* Block number of log tail */
	443	__be32 lh_blkno;
c1696fb8 BP	444	__be32 lh_hash; /* crc up to here with this field 0 */
	445
	446	/* Version 2 additional fields start here */
	447	__be32 lh_crc; /* crc32c from lh_nsec to end of block */
	448	__be32 lh_nsec; /* Nanoseconds of timestamp */
	449	__be64 lh_sec; /* Seconds of timestamp */
	450	__be64 lh_addr; /* Block addr of this log header (absolute) */
	451	__be64 lh_jinode; /* Journal inode number */
	452	__be64 lh_statfs_addr; /* Local statfs inode number */
	453	__be64 lh_quota_addr; /* Local quota change inode number */
	454
	455	/* Statfs local changes (i.e. diff from global statfs) */
	456	__be64 lh_local_total;
	457	__be64 lh_local_free;
	458	__be64 lh_local_dinodes;
b3b94faa DT	459	};
	460
	461	/*
	462	* Log type descriptor
	463	*/
	464
	465	#define GFS2_LOG_DESC_METADATA 300
	466	/* ld_data1 is the number of metadata blocks in the descriptor.
	467	ld_data2 is unused. */
	468
	469	#define GFS2_LOG_DESC_REVOKE 301
	470	/* ld_data1 is the number of revoke blocks in the descriptor.
	471	ld_data2 is unused. */
	472
18ec7d5c SW	473	#define GFS2_LOG_DESC_JDATA 302
	474	/* ld_data1 is the number of data blocks in the descriptor.
	475	ld_data2 is unused. */
	476
b3b94faa DT	477	struct gfs2_log_descriptor {
	478	struct gfs2_meta_header ld_header;
	479
	480	__be32 ld_type; /* GFS2_LOG_DESC_... */
	481	__be32 ld_length; /* Number of buffers in this chunk */
	482	__be32 ld_data1; /* descriptor-specific field */
	483	__be32 ld_data2; /* descriptor-specific field */
	484
	485	__u8 ld_reserved[32];
	486	};
	487
	488	/*
	489	* Inum Range
	490	* Describe a range of formal inode numbers allocated to
	491	* one machine to assign to inodes.
	492	*/
	493
	494	#define GFS2_INUM_QUANTUM 1048576
	495
	496	struct gfs2_inum_range {
	497	__be64 ir_start;
	498	__be64 ir_length;
	499	};
	500
	501	/*
	502	* Statfs change
	503	* Describes an change to the pool of free and allocated
	504	* blocks.
	505	*/
	506
	507	struct gfs2_statfs_change {
	508	__be64 sc_total;
	509	__be64 sc_free;
	510	__be64 sc_dinodes;
	511	};
	512
b3b94faa DT	513	/*
	514	* Quota change
	515	* Describes an allocation change for a particular
	516	* user or group.
	517	*/
	518
	519	#define GFS2_QCF_USER 0x00000001
	520
	521	struct gfs2_quota_change {
	522	__be64 qc_change;
	523	__be32 qc_flags; /* GFS2_QCF_... */
	524	__be32 qc_id;
	525	};
	526
2a87ab08 AD	527	struct gfs2_quota_lvb {
2a87ab08 AD	528	__be32 qb_magic;
518bbde3	529	__u32 __pad;
2a87ab08 AD	530	__be64 qb_limit; /* Hard limit of # blocks to alloc */
	531	__be64 qb_warn; /* Warn user when alloc is above this # */
	532	__be64 qb_value; /* Current # blocks allocated */
	533	};
	534
b3b94faa	535	#endif /* __GFS2_ONDISK_DOT_H__ */