gfs2_ondisk.h
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gfs2_ondisk.h
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	/******************************************************************************
	*******************************************************************************
	**
	** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
	**
	** This copyrighted material is made available to anyone wishing to use,
	** modify, copy, or redistribute it subject to the terms and conditions
	** of the GNU General Public License v.2.
	**
	*******************************************************************************
	******************************************************************************/

	#ifndef __GFS2_ONDISK_DOT_H__
	#define __GFS2_ONDISK_DOT_H__

	#define GFS2_MAGIC 0x07131974
	#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 1100
	#define GFS2_FORMAT_ED 1200
	#define GFS2_FORMAT_UT 1300
	#define GFS2_FORMAT_QC 1400
	/* These are format numbers for entities contained in files */
	#define GFS2_FORMAT_RI 1500
	#define GFS2_FORMAT_DE 1600
	#define GFS2_FORMAT_QU 1700
	/* These are part of the superblock */
	#define GFS2_FORMAT_FS 1801
	#define GFS2_FORMAT_MULTI 1900

	/*
	* An on-disk inode number
	*/

	#define gfs2_inum_equal(ino1, ino2) \
	(((ino1)->no_formal_ino == (ino2)->no_formal_ino) && \
	((ino1)->no_addr == (ino2)->no_addr))

	struct gfs2_inum {
	uint64_t no_formal_ino;
	uint64_t 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 10
	#define GFS2_METATYPE_EA 11
	#define GFS2_METATYPE_ED 12
	#define GFS2_METATYPE_UT 13
	#define GFS2_METATYPE_QC 14

	struct gfs2_meta_header {
	uint32_t mh_magic;
	uint16_t mh_type;
	uint16_t mh_format;
	uint64_t mh_blkno;
	};

	/*
	* 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;

	uint32_t sb_fs_format;
	uint32_t sb_multihost_format;

	uint32_t sb_bsize;
	uint32_t sb_bsize_shift;

	struct gfs2_inum sb_master_dir;

	char sb_lockproto[GFS2_LOCKNAME_LEN];
	char sb_locktable[GFS2_LOCKNAME_LEN];
	};

	/*
	* resource index structure
	*/

	struct gfs2_rindex {
	uint64_t ri_addr; /* grp block disk address */
	uint32_t ri_length; /* length of rgrp header in fs blocks */
	uint32_t ri_pad;

	uint64_t ri_data0; /* first data location */
	uint32_t ri_data; /* num of data blocks in rgrp */

	uint32_t ri_bitbytes; /* number of bytes in data bitmaps */

	char ri_reserved[32];
	};

	/*
	* resource group header structure
	*/

	/* Number of blocks per byte in rgrp */
	#define GFS2_NBBY 4
	#define GFS2_BIT_SIZE 2
	#define GFS2_BIT_MASK 0x00000003

	#define GFS2_BLKST_FREE 0
	#define GFS2_BLKST_USED 1
	#define GFS2_BLKST_INVALID 2
	#define GFS2_BLKST_DINODE 3

	#define GFS2_RGF_JOURNAL 0x00000001
	#define GFS2_RGF_METAONLY 0x00000002
	#define GFS2_RGF_DATAONLY 0x00000004
	#define GFS2_RGF_NOALLOC 0x00000008

	struct gfs2_rgrp {
	struct gfs2_meta_header rg_header;

	uint32_t rg_flags;
	uint32_t rg_free;
	uint32_t rg_dinodes;

	char rg_reserved[36];
	};

	/*
	* quota structure
	*/

	struct gfs2_quota {
	uint64_t qu_limit;
	uint64_t qu_warn;
	int64_t qu_value;
	};

	/*
	* dinode structure
	*/

	#define GFS2_MAX_META_HEIGHT 10
	#define GFS2_DIR_MAX_DEPTH 17

	#define DT2IF(dt) (((dt) << 12) & S_IFMT)
	#define IF2DT(sif) (((sif) & S_IFMT) >> 12)

	/* Dinode flags */
	#define GFS2_DIF_SYSTEM 0x00000001
	#define GFS2_DIF_JDATA 0x00000002
	#define GFS2_DIF_EXHASH 0x00000004
	#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_INHERIT_DIRECTIO 0x00000200
	#define GFS2_DIF_INHERIT_JDATA 0x00000400
	#define GFS2_DIF_TRUNC_IN_PROG 0x00000800

	struct gfs2_dinode {
	struct gfs2_meta_header di_header;

	struct gfs2_inum di_num;

	uint32_t di_mode; /* mode of file */
	uint32_t di_uid; /* owner's user id */
	uint32_t di_gid; /* owner's group id */
	uint32_t di_nlink; /* number of links to this file */
	uint64_t di_size; /* number of bytes in file */
	uint64_t di_blocks; /* number of blocks in file */
	int64_t di_atime; /* time last accessed */
	int64_t di_mtime; /* time last modified */
	int64_t di_ctime; /* time last changed */
	uint32_t di_major; /* device major number */
	uint32_t di_minor; /* device minor number */

	uint64_t di_goal_meta; /* rgrp to alloc from next */
	uint64_t di_goal_data; /* data block goal */

	uint32_t di_flags; /* GFS2_DIF_... */
	uint32_t di_payload_format; /* GFS2_FORMAT_... */
	uint16_t di_height; /* height of metadata */

	/* These only apply to directories */
	uint16_t di_depth; /* Number of bits in the table */
	uint32_t di_entries; /* The number of entries in the directory */

	uint64_t di_eattr; /* extended attribute block number */

	char di_reserved[32];
	};

	/*
	* 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;
	uint32_t de_hash;
	uint32_t de_rec_len;
	uint8_t de_name_len;
	uint8_t de_type;
	uint16_t de_pad1;
	uint32_t de_pad2;
	};

	/*
	* Header of leaf directory nodes
	*/

	struct gfs2_leaf {
	struct gfs2_meta_header lf_header;

	uint16_t lf_depth; /* Depth of leaf */
	uint16_t lf_entries; /* Number of dirents in leaf */
	uint32_t lf_dirent_format; /* Format of the dirents */
	uint64_t lf_next; /* Next leaf, if overflow */

	char lf_reserved[32];
	};

	/*
	* Extended attribute header format
	*/

	#define GFS2_EA_MAX_NAME_LEN 255
	#define GFS2_EA_MAX_DATA_LEN 65536

	#define GFS2_EATYPE_UNUSED 0
	#define GFS2_EATYPE_USR 1
	#define GFS2_EATYPE_SYS 2

	#define GFS2_EATYPE_LAST 2
	#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)

	#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */

	struct gfs2_ea_header {
	uint32_t ea_rec_len;
	uint32_t ea_data_len;
	uint8_t ea_name_len; /* no NULL pointer after the string */
	uint8_t ea_type; /* GFS2_EATYPE_... */
	uint8_t ea_flags; /* GFS2_EAFLAG_... */
	uint8_t ea_num_ptrs;
	uint32_t ea_pad;
	};

	/*
	* Log header structure
	*/

	#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */

	struct gfs2_log_header {
	struct gfs2_meta_header lh_header;

	uint64_t lh_sequence; /* Sequence number of this transaction */
	uint32_t lh_flags; /* GFS2_LOG_HEAD_... */
	uint32_t lh_tail; /* Block number of log tail */
	uint32_t lh_blkno;
	uint32_t 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. */

	struct gfs2_log_descriptor {
	struct gfs2_meta_header ld_header;

	uint32_t ld_type; /* GFS2_LOG_DESC_... */
	uint32_t ld_length; /* Number of buffers in this chunk */
	uint32_t ld_data1; /* descriptor-specific field */
	uint32_t ld_data2; /* descriptor-specific field */

	char 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 {
	uint64_t ir_start;
	uint64_t ir_length;
	};

	/*
	* Statfs change
	* Describes an change to the pool of free and allocated
	* blocks.
	*/

	struct gfs2_statfs_change {
	int64_t sc_total;
	int64_t sc_free;
	int64_t sc_dinodes;
	};

	/*
	* Unlinked Tag
	* Describes an allocated inode that isn't linked into
	* the directory tree and might need to be deallocated.
	*/

	#define GFS2_UTF_UNINIT 0x00000001

	struct gfs2_unlinked_tag {
	struct gfs2_inum ut_inum;
	uint32_t ut_flags; /* GFS2_UTF_... */
	uint32_t ut_pad;
	};

	/*
	* Quota change
	* Describes an allocation change for a particular
	* user or group.
	*/

	#define GFS2_QCF_USER 0x00000001

	struct gfs2_quota_change {
	int64_t qc_change;
	uint32_t qc_flags; /* GFS2_QCF_... */
	uint32_t qc_id;
	};

	/* Endian functions */

	#undef GFS2_ENDIAN_BIG

	#ifdef GFS2_ENDIAN_BIG

	#define gfs2_16_to_cpu be16_to_cpu
	#define gfs2_32_to_cpu be32_to_cpu
	#define gfs2_64_to_cpu be64_to_cpu

	#define cpu_to_gfs2_16 cpu_to_be16
	#define cpu_to_gfs2_32 cpu_to_be32
	#define cpu_to_gfs2_64 cpu_to_be64

	#else /* GFS2_ENDIAN_BIG */

	#define gfs2_16_to_cpu le16_to_cpu
	#define gfs2_32_to_cpu le32_to_cpu
	#define gfs2_64_to_cpu le64_to_cpu

	#define cpu_to_gfs2_16 cpu_to_le16
	#define cpu_to_gfs2_32 cpu_to_le32
	#define cpu_to_gfs2_64 cpu_to_le64

	#endif /* GFS2_ENDIAN_BIG */

	/* Translation functions */

	void gfs2_inum_in(struct gfs2_inum no, char buf);
	void gfs2_inum_out(struct gfs2_inum no, char buf);
	void gfs2_meta_header_in(struct gfs2_meta_header mh, char buf);
	void gfs2_meta_header_out(struct gfs2_meta_header mh, char buf);
	void gfs2_sb_in(struct gfs2_sb sb, char buf);
	void gfs2_sb_out(struct gfs2_sb sb, char buf);
	void gfs2_rindex_in(struct gfs2_rindex ri, char buf);
	void gfs2_rindex_out(struct gfs2_rindex ri, char buf);
	void gfs2_rgrp_in(struct gfs2_rgrp rg, char buf);
	void gfs2_rgrp_out(struct gfs2_rgrp rg, char buf);
	void gfs2_quota_in(struct gfs2_quota qu, char buf);
	void gfs2_quota_out(struct gfs2_quota qu, char buf);
	void gfs2_dinode_in(struct gfs2_dinode di, char buf);
	void gfs2_dinode_out(struct gfs2_dinode di, char buf);
	void gfs2_dirent_in(struct gfs2_dirent de, char buf);
	void gfs2_dirent_out(struct gfs2_dirent de, char buf);
	void gfs2_leaf_in(struct gfs2_leaf lf, char buf);
	void gfs2_leaf_out(struct gfs2_leaf lf, char buf);
	void gfs2_ea_header_in(struct gfs2_ea_header ea, char buf);
	void gfs2_ea_header_out(struct gfs2_ea_header ea, char buf);
	void gfs2_log_header_in(struct gfs2_log_header lh, char buf);
	void gfs2_log_header_out(struct gfs2_log_header lh, char buf);
	void gfs2_log_descriptor_in(struct gfs2_log_descriptor ld, char buf);
	void gfs2_log_descriptor_out(struct gfs2_log_descriptor ld, char buf);
	void gfs2_inum_range_in(struct gfs2_inum_range ir, char buf);
	void gfs2_inum_range_out(struct gfs2_inum_range ir, char buf);
	void gfs2_statfs_change_in(struct gfs2_statfs_change sc, char buf);
	void gfs2_statfs_change_out(struct gfs2_statfs_change sc, char buf);
	void gfs2_unlinked_tag_in(struct gfs2_unlinked_tag ut, char buf);
	void gfs2_unlinked_tag_out(struct gfs2_unlinked_tag ut, char buf);
	void gfs2_quota_change_in(struct gfs2_quota_change qc, char buf);
	void gfs2_quota_change_out(struct gfs2_quota_change qc, char buf);

	/* Printing functions */

	void gfs2_inum_print(struct gfs2_inum *no);
	void gfs2_meta_header_print(struct gfs2_meta_header *mh);
	void gfs2_sb_print(struct gfs2_sb *sb);
	void gfs2_rindex_print(struct gfs2_rindex *ri);
	void gfs2_rgrp_print(struct gfs2_rgrp *rg);
	void gfs2_quota_print(struct gfs2_quota *qu);
	void gfs2_dinode_print(struct gfs2_dinode *di);
	void gfs2_dirent_print(struct gfs2_dirent de, char name);
	void gfs2_leaf_print(struct gfs2_leaf *lf);
	void gfs2_ea_header_print(struct gfs2_ea_header ea, char name);
	void gfs2_log_header_print(struct gfs2_log_header *lh);
	void gfs2_log_descriptor_print(struct gfs2_log_descriptor *ld);
	void gfs2_inum_range_print(struct gfs2_inum_range *ir);
	void gfs2_statfs_change_print(struct gfs2_statfs_change *sc);
	void gfs2_unlinked_tag_print(struct gfs2_unlinked_tag *ut);
	void gfs2_quota_change_print(struct gfs2_quota_change *qc);

	/* The hash function for ExHash directories and
	crcs of commit blocks */

	uint32_t gfs2_disk_hash(const char *data, int len);

	#endif /* __GFS2_ONDISK_DOT_H__ */



	#ifdef WANT_GFS2_CONVERSION_FUNCTIONS

	#define CPIN_08(s1, s2, member, count) {memcpy((s1->member), (s2->member), (count));}
	#define CPOUT_08(s1, s2, member, count) {memcpy((s2->member), (s1->member), (count));}
	#define CPIN_16(s1, s2, member) {(s1->member) = gfs2_16_to_cpu((s2->member));}
	#define CPOUT_16(s1, s2, member) {(s2->member) = cpu_to_gfs2_16((s1->member));}
	#define CPIN_32(s1, s2, member) {(s1->member) = gfs2_32_to_cpu((s2->member));}
	#define CPOUT_32(s1, s2, member) {(s2->member) = cpu_to_gfs2_32((s1->member));}
	#define CPIN_64(s1, s2, member) {(s1->member) = gfs2_64_to_cpu((s2->member));}
	#define CPOUT_64(s1, s2, member) {(s2->member) = cpu_to_gfs2_64((s1->member));}

	#define pv(struct, member, fmt) printk(" "#member" = "fmt"\n", struct->member);
	#define pa(struct, member, count) print_array(#member, struct->member, count);

	/**
	* print_array - Print out an array of bytes
	* @title: what to print before the array
	* @buf: the array
	* @count: the number of bytes
	*
	*/

	static void print_array(char title, char buf, int count)
	{
	int x;

	printk(" %s =\n", title);
	for (x = 0; x < count; x++) {
	printk("%.2X ", (unsigned char)buf[x]);
	if (x % 16 == 15)
	printk("\n");
	}
	if (x % 16)
	printk("\n");
	}

	/**
	* gfs2_inum_in - Read in an inode number
	* @no: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_inum_in(struct gfs2_inum no, char buf)
	{
	struct gfs2_inum str = (struct gfs2_inum )buf;

	CPIN_64(no, str, no_formal_ino);
	CPIN_64(no, str, no_addr);
	}

	/**
	* gfs2_inum_out - Write out an inode number
	* @no: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_inum_out(struct gfs2_inum no, char buf)
	{
	struct gfs2_inum str = (struct gfs2_inum )buf;

	CPOUT_64(no, str, no_formal_ino);
	CPOUT_64(no, str, no_addr);
	}

	/**
	* gfs2_inum_print - Print out a inode number
	* @no: the cpu-order buffer
	*
	*/

	void gfs2_inum_print(struct gfs2_inum *no)
	{
	pv(no, no_formal_ino, "%"PRIu64);
	pv(no, no_addr, "%"PRIu64);
	}

	/**
	* gfs2_meta_header_in - Read in a metadata header
	* @mh: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_meta_header_in(struct gfs2_meta_header mh, char buf)
	{
	struct gfs2_meta_header str = (struct gfs2_meta_header )buf;

	CPIN_32(mh, str, mh_magic);
	CPIN_16(mh, str, mh_type);
	CPIN_16(mh, str, mh_format);
	CPIN_64(mh, str, mh_blkno);
	}

	/**
	* gfs2_meta_header_in - Write out a metadata header
	* @mh: the cpu-order structure
	* @buf: the disk-order buffer
	*
	* Don't ever change the generation number in this routine.
	* It's done manually in increment_generation().
	*/

	void gfs2_meta_header_out(struct gfs2_meta_header mh, char buf)
	{
	struct gfs2_meta_header str = (struct gfs2_meta_header )buf;

	CPOUT_32(mh, str, mh_magic);
	CPOUT_16(mh, str, mh_type);
	CPOUT_16(mh, str, mh_format);
	CPOUT_64(mh, str, mh_blkno);
	}

	/**
	* gfs2_meta_header_print - Print out a metadata header
	* @mh: the cpu-order buffer
	*
	*/

	void gfs2_meta_header_print(struct gfs2_meta_header *mh)
	{
	pv(mh, mh_magic, "0x%.8X");
	pv(mh, mh_type, "%u");
	pv(mh, mh_format, "%u");
	pv(mh, mh_blkno, "%"PRIu64);
	}

	/**
	* gfs2_sb_in - Read in a superblock
	* @sb: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_sb_in(struct gfs2_sb sb, char buf)
	{
	struct gfs2_sb str = (struct gfs2_sb )buf;

	gfs2_meta_header_in(&sb->sb_header, buf);

	CPIN_32(sb, str, sb_fs_format);
	CPIN_32(sb, str, sb_multihost_format);

	CPIN_32(sb, str, sb_bsize);
	CPIN_32(sb, str, sb_bsize_shift);

	gfs2_inum_in(&sb->sb_master_dir, (char *)&str->sb_master_dir);

	CPIN_08(sb, str, sb_lockproto, GFS2_LOCKNAME_LEN);
	CPIN_08(sb, str, sb_locktable, GFS2_LOCKNAME_LEN);
	}

	/**
	* gfs2_sb_out - Write out a superblock
	* @sb: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_sb_out(struct gfs2_sb sb, char buf)
	{
	struct gfs2_sb str = (struct gfs2_sb )buf;

	gfs2_meta_header_out(&sb->sb_header, buf);

	CPOUT_32(sb, str, sb_fs_format);
	CPOUT_32(sb, str, sb_multihost_format);

	CPOUT_32(sb, str, sb_bsize);
	CPOUT_32(sb, str, sb_bsize_shift);

	gfs2_inum_out(&sb->sb_master_dir, (char *)&str->sb_master_dir);

	CPOUT_08(sb, str, sb_lockproto, GFS2_LOCKNAME_LEN);
	CPOUT_08(sb, str, sb_locktable, GFS2_LOCKNAME_LEN);
	}

	/**
	* gfs2_sb_print - Print out a superblock
	* @sb: the cpu-order buffer
	*
	*/

	void gfs2_sb_print(struct gfs2_sb *sb)
	{
	gfs2_meta_header_print(&sb->sb_header);

	pv(sb, sb_fs_format, "%u");
	pv(sb, sb_multihost_format, "%u");

	pv(sb, sb_bsize, "%u");
	pv(sb, sb_bsize_shift, "%u");

	gfs2_inum_print(&sb->sb_master_dir);

	pv(sb, sb_lockproto, "%s");
	pv(sb, sb_locktable, "%s");
	}

	/**
	* gfs2_rindex_in - Read in a resource index structure
	* @ri: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_rindex_in(struct gfs2_rindex ri, char buf)
	{
	struct gfs2_rindex str = (struct gfs2_rindex )buf;

	CPIN_64(ri, str, ri_addr);
	CPIN_32(ri, str, ri_length);
	CPIN_32(ri, str, ri_pad);

	CPIN_64(ri, str, ri_data0);
	CPIN_32(ri, str, ri_data);

	CPIN_32(ri, str, ri_bitbytes);

	CPIN_08(ri, str, ri_reserved, 32);
	}

	/**
	* gfs2_rindex_out - Write out a resource index structure
	* @ri: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_rindex_out(struct gfs2_rindex ri, char buf)
	{
	struct gfs2_rindex str = (struct gfs2_rindex )buf;

	CPOUT_64(ri, str, ri_addr);
	CPOUT_32(ri, str, ri_length);
	CPOUT_32(ri, str, ri_pad);

	CPOUT_64(ri, str, ri_data0);
	CPOUT_32(ri, str, ri_data);

	CPOUT_32(ri, str, ri_bitbytes);

	CPOUT_08(ri, str, ri_reserved, 32);
	}

	/**
	* gfs2_rindex_print - Print out a resource index structure
	* @ri: the cpu-order buffer
	*
	*/

	void gfs2_rindex_print(struct gfs2_rindex *ri)
	{
	pv(ri, ri_addr, "%"PRIu64);
	pv(ri, ri_length, "%u");
	pv(ri, ri_pad, "%u");

	pv(ri, ri_data0, "%"PRIu64);
	pv(ri, ri_data, "%u");

	pv(ri, ri_bitbytes, "%u");

	pa(ri, ri_reserved, 32);
	}

	/**
	* gfs2_rgrp_in - Read in a resource group header
	* @rg: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_rgrp_in(struct gfs2_rgrp rg, char buf)
	{
	struct gfs2_rgrp str = (struct gfs2_rgrp )buf;

	gfs2_meta_header_in(&rg->rg_header, buf);
	CPIN_32(rg, str, rg_flags);
	CPIN_32(rg, str, rg_free);
	CPIN_32(rg, str, rg_dinodes);

	CPIN_08(rg, str, rg_reserved, 36);
	}

	/**
	* gfs2_rgrp_out - Write out a resource group header
	* @rg: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_rgrp_out(struct gfs2_rgrp rg, char buf)
	{
	struct gfs2_rgrp str = (struct gfs2_rgrp )buf;

	gfs2_meta_header_out(&rg->rg_header, buf);
	CPOUT_32(rg, str, rg_flags);
	CPOUT_32(rg, str, rg_free);
	CPOUT_32(rg, str, rg_dinodes);

	CPOUT_08(rg, str, rg_reserved, 36);
	}

	/**
	* gfs2_rgrp_print - Print out a resource group header
	* @rg: the cpu-order buffer
	*
	*/

	void gfs2_rgrp_print(struct gfs2_rgrp *rg)
	{
	gfs2_meta_header_print(&rg->rg_header);
	pv(rg, rg_flags, "%u");
	pv(rg, rg_free, "%u");
	pv(rg, rg_dinodes, "%u");

	pa(rg, rg_reserved, 36);
	}

	/**
	* gfs2_quota_in - Read in a qu structures
	* @qu: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_quota_in(struct gfs2_quota qu, char buf)
	{
	struct gfs2_quota str = (struct gfs2_quota )buf;

	CPIN_64(qu, str, qu_limit);
	CPIN_64(qu, str, qu_warn);
	CPIN_64(qu, str, qu_value);
	}

	/**
	* gfs2_quota_out - Write out a qu structure
	* @qu: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_quota_out(struct gfs2_quota qu, char buf)
	{
	struct gfs2_quota str = (struct gfs2_quota )buf;

	CPOUT_64(qu, str, qu_limit);
	CPOUT_64(qu, str, qu_warn);
	CPOUT_64(qu, str, qu_value);
	}

	/**
	* gfs2_quota_print - Print out a qu structure
	* @qu: the cpu-order buffer
	*
	*/

	void gfs2_quota_print(struct gfs2_quota *qu)
	{
	pv(qu, qu_limit, "%"PRIu64);
	pv(qu, qu_warn, "%"PRIu64);
	pv(qu, qu_value, "%"PRId64);
	}

	/**
	* gfs2_dinode_in - Read in a di
	* @di: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_dinode_in(struct gfs2_dinode di, char buf)
	{
	struct gfs2_dinode str = (struct gfs2_dinode )buf;

	gfs2_meta_header_in(&di->di_header, buf);
	gfs2_inum_in(&di->di_num, (char *)&str->di_num);

	CPIN_32(di, str, di_mode);
	CPIN_32(di, str, di_uid);
	CPIN_32(di, str, di_gid);
	CPIN_32(di, str, di_nlink);
	CPIN_64(di, str, di_size);
	CPIN_64(di, str, di_blocks);
	CPIN_64(di, str, di_atime);
	CPIN_64(di, str, di_mtime);
	CPIN_64(di, str, di_ctime);
	CPIN_32(di, str, di_major);
	CPIN_32(di, str, di_minor);

	CPIN_64(di, str, di_goal_meta);
	CPIN_64(di, str, di_goal_data);

	CPIN_32(di, str, di_flags);
	CPIN_32(di, str, di_payload_format);
	CPIN_16(di, str, di_height);

	CPIN_16(di, str, di_depth);
	CPIN_32(di, str, di_entries);

	CPIN_64(di, str, di_eattr);

	CPIN_08(di, str, di_reserved, 32);
	}

	/**
	* gfs2_dinode_out - Write out a di
	* @di: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_dinode_out(struct gfs2_dinode di, char buf)
	{
	struct gfs2_dinode str = (struct gfs2_dinode )buf;

	gfs2_meta_header_out(&di->di_header, buf);
	gfs2_inum_out(&di->di_num, (char *)&str->di_num);

	CPOUT_32(di, str, di_mode);
	CPOUT_32(di, str, di_uid);
	CPOUT_32(di, str, di_gid);
	CPOUT_32(di, str, di_nlink);
	CPOUT_64(di, str, di_size);
	CPOUT_64(di, str, di_blocks);
	CPOUT_64(di, str, di_atime);
	CPOUT_64(di, str, di_mtime);
	CPOUT_64(di, str, di_ctime);
	CPOUT_32(di, str, di_major);
	CPOUT_32(di, str, di_minor);

	CPOUT_64(di, str, di_goal_meta);
	CPOUT_64(di, str, di_goal_data);

	CPOUT_32(di, str, di_flags);
	CPOUT_32(di, str, di_payload_format);
	CPOUT_16(di, str, di_height);

	CPOUT_16(di, str, di_depth);
	CPOUT_32(di, str, di_entries);

	CPOUT_64(di, str, di_eattr);

	CPOUT_08(di, str, di_reserved, 32);
	}

	/**
	* gfs2_dinode_print - Print out a di
	* @di: the cpu-order buffer
	*
	*/

	void gfs2_dinode_print(struct gfs2_dinode *di)
	{
	gfs2_meta_header_print(&di->di_header);
	gfs2_inum_print(&di->di_num);

	pv(di, di_mode, "0%o");
	pv(di, di_uid, "%u");
	pv(di, di_gid, "%u");
	pv(di, di_nlink, "%u");
	pv(di, di_size, "%"PRIu64);
	pv(di, di_blocks, "%"PRIu64);
	pv(di, di_atime, "%"PRId64);
	pv(di, di_mtime, "%"PRId64);
	pv(di, di_ctime, "%"PRId64);
	pv(di, di_major, "%u");
	pv(di, di_minor, "%u");

	pv(di, di_goal_meta, "%"PRIu64);
	pv(di, di_goal_data, "%"PRIu64);

	pv(di, di_flags, "0x%.8X");
	pv(di, di_payload_format, "%u");
	pv(di, di_height, "%u");

	pv(di, di_depth, "%u");
	pv(di, di_entries, "%u");

	pv(di, di_eattr, "%"PRIu64);

	pa(di, di_reserved, 32);
	}

	/**
	* gfs2_dirent_in - Read in a directory entry
	* @de: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_dirent_in(struct gfs2_dirent de, char buf)
	{
	struct gfs2_dirent str = (struct gfs2_dirent )buf;

	gfs2_inum_in(&de->de_inum, buf);
	CPIN_32(de, str, de_hash);
	CPIN_32(de, str, de_rec_len);
	de->de_name_len = str->de_name_len;
	de->de_type = str->de_type;
	CPIN_16(de, str, de_pad1);
	CPIN_32(de, str, de_pad2);
	}

	/**
	* gfs2_dirent_out - Write out a directory entry
	* @de: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_dirent_out(struct gfs2_dirent de, char buf)
	{
	struct gfs2_dirent str = (struct gfs2_dirent )buf;

	gfs2_inum_out(&de->de_inum, buf);
	CPOUT_32(de, str, de_hash);
	CPOUT_32(de, str, de_rec_len);
	str->de_name_len = de->de_name_len;
	str->de_type = de->de_type;
	CPOUT_16(de, str, de_pad1);
	CPOUT_32(de, str, de_pad2);
	}

	/**
	* gfs2_dirent_print - Print out a directory entry
	* @de: the cpu-order buffer
	* @name: the filename
	*
	*/

	void gfs2_dirent_print(struct gfs2_dirent de, char name)
	{
	char buf[GFS2_FNAMESIZE + 1];

	gfs2_inum_print(&de->de_inum);
	pv(de, de_hash, "0x%.8X");
	pv(de, de_rec_len, "%u");
	pv(de, de_name_len, "%u");
	pv(de, de_type, "%u");
	pv(de, de_pad1, "%u");
	pv(de, de_pad2, "%u");

	memset(buf, 0, GFS2_FNAMESIZE + 1);
	memcpy(buf, name, de->de_name_len);
	printk(" name = %s\n", buf);
	}

	/**
	* gfs2_leaf_in - Read in a directory lf header
	* @lf: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_leaf_in(struct gfs2_leaf lf, char buf)
	{
	struct gfs2_leaf str = (struct gfs2_leaf )buf;

	gfs2_meta_header_in(&lf->lf_header, buf);
	CPIN_16(lf, str, lf_depth);
	CPIN_16(lf, str, lf_entries);
	CPIN_32(lf, str, lf_dirent_format);
	CPIN_64(lf, str, lf_next);

	CPIN_08(lf, str, lf_reserved, 32);
	}

	/**
	* gfs2_leaf_out - Write out a directory lf header
	* @lf: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_leaf_out(struct gfs2_leaf lf, char buf)
	{
	struct gfs2_leaf str = (struct gfs2_leaf )buf;

	gfs2_meta_header_out(&lf->lf_header, buf);
	CPOUT_16(lf, str, lf_depth);
	CPOUT_16(lf, str, lf_entries);
	CPOUT_32(lf, str, lf_dirent_format);
	CPOUT_64(lf, str, lf_next);

	CPOUT_08(lf, str, lf_reserved, 32);
	}

	/**
	* gfs2_leaf_print - Print out a directory lf header
	* @lf: the cpu-order buffer
	*
	*/

	void gfs2_leaf_print(struct gfs2_leaf *lf)
	{
	gfs2_meta_header_print(&lf->lf_header);
	pv(lf, lf_depth, "%u");
	pv(lf, lf_entries, "%u");
	pv(lf, lf_dirent_format, "%u");
	pv(lf, lf_next, "%"PRIu64);

	pa(lf, lf_reserved, 32);
	}

	/**
	* gfs2_ea_header_in - Read in a Extended Attribute header
	* @qc: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_ea_header_in(struct gfs2_ea_header ea, char buf)
	{
	struct gfs2_ea_header str = (struct gfs2_ea_header )buf;

	CPIN_32(ea, str, ea_rec_len);
	CPIN_32(ea, str, ea_data_len);
	ea->ea_name_len = str->ea_name_len;
	ea->ea_type = str->ea_type;
	ea->ea_flags = str->ea_flags;
	ea->ea_num_ptrs = str->ea_num_ptrs;
	CPIN_32(ea, str, ea_pad);
	}

	/**
	* gfs2_ea_header_out - Write out a Extended Attribute header
	* @ea: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_ea_header_out(struct gfs2_ea_header ea, char buf)
	{
	struct gfs2_ea_header str = (struct gfs2_ea_header )buf;

	CPOUT_32(ea, str, ea_rec_len);
	CPOUT_32(ea, str, ea_data_len);
	str->ea_name_len = ea->ea_name_len;
	str->ea_type = ea->ea_type;
	str->ea_flags = ea->ea_flags;
	str->ea_num_ptrs = ea->ea_num_ptrs;
	CPOUT_32(ea, str, ea_pad);
	}

	/**
	* gfs2_ea_header_print - Print out a Extended Attribute header
	* @ea: the cpu-order buffer
	*
	*/

	void gfs2_ea_header_print(struct gfs2_ea_header ea, char name)
	{
	char buf[GFS2_EA_MAX_NAME_LEN + 1];

	pv(ea, ea_rec_len, "%u");
	pv(ea, ea_data_len, "%u");
	pv(ea, ea_name_len, "%u");
	pv(ea, ea_type, "%u");
	pv(ea, ea_flags, "%u");
	pv(ea, ea_num_ptrs, "%u");
	pv(ea, ea_pad, "%u");

	memset(buf, 0, GFS2_EA_MAX_NAME_LEN + 1);
	memcpy(buf, name, ea->ea_name_len);
	printk(" name = %s\n", buf);
	}

	/**
	* gfs2_log_header_in - Read in a log header
	* @lh: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_log_header_in(struct gfs2_log_header lh, char buf)
	{
	struct gfs2_log_header str = (struct gfs2_log_header )buf;

	gfs2_meta_header_in(&lh->lh_header, buf);
	CPIN_64(lh, str, lh_sequence);
	CPIN_32(lh, str, lh_flags);
	CPIN_32(lh, str, lh_tail);
	CPIN_32(lh, str, lh_blkno);
	CPIN_32(lh, str, lh_hash);
	}

	/**
	* gfs2_log_header_out - Write out a log header
	* @lh: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_log_header_out(struct gfs2_log_header lh, char buf)
	{
	struct gfs2_log_header str = (struct gfs2_log_header )buf;

	gfs2_meta_header_out(&lh->lh_header, buf);
	CPOUT_64(lh, str, lh_sequence);
	CPOUT_32(lh, str, lh_flags);
	CPOUT_32(lh, str, lh_tail);
	CPOUT_32(lh, str, lh_blkno);
	CPOUT_32(lh, str, lh_hash);
	}

	/**
	* gfs2_log_header_print - Print out a log header
	* @lh: the cpu-order buffer
	*
	*/

	void gfs2_log_header_print(struct gfs2_log_header *lh)
	{
	gfs2_meta_header_print(&lh->lh_header);
	pv(lh, lh_sequence, "%"PRIu64);
	pv(lh, lh_flags, "0x%.8X");
	pv(lh, lh_tail, "%u");
	pv(lh, lh_blkno, "%u");
	pv(lh, lh_hash, "0x%.8X");
	}

	/**
	* gfs2_log_descriptor_in - Read in a log descriptor
	* @ld: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_log_descriptor_in(struct gfs2_log_descriptor ld, char buf)
	{
	struct gfs2_log_descriptor str = (struct gfs2_log_descriptor )buf;

	gfs2_meta_header_in(&ld->ld_header, buf);
	CPIN_32(ld, str, ld_type);
	CPIN_32(ld, str, ld_length);
	CPIN_32(ld, str, ld_data1);
	CPIN_32(ld, str, ld_data2);

	CPIN_08(ld, str, ld_reserved, 32);
	}

	/**
	* gfs2_log_descriptor_out - Write out a log descriptor
	* @ld: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_log_descriptor_out(struct gfs2_log_descriptor ld, char buf)
	{
	struct gfs2_log_descriptor str = (struct gfs2_log_descriptor )buf;

	gfs2_meta_header_out(&ld->ld_header, buf);
	CPOUT_32(ld, str, ld_type);
	CPOUT_32(ld, str, ld_length);
	CPOUT_32(ld, str, ld_data1);
	CPOUT_32(ld, str, ld_data2);

	CPOUT_08(ld, str, ld_reserved, 32);
	}

	/**
	* gfs2_log_descriptor_print - Print out a log descriptor
	* @ld: the cpu-order buffer
	*
	*/

	void gfs2_log_descriptor_print(struct gfs2_log_descriptor *ld)
	{
	gfs2_meta_header_print(&ld->ld_header);
	pv(ld, ld_type, "%u");
	pv(ld, ld_length, "%u");
	pv(ld, ld_data1, "%u");
	pv(ld, ld_data2, "%u");

	pa(ld, ld_reserved, 32);
	}

	/**
	* gfs2_inum_range_in - Read in an inum range
	* @ir: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_inum_range_in(struct gfs2_inum_range ir, char buf)
	{
	struct gfs2_inum_range str = (struct gfs2_inum_range )buf;

	CPIN_64(ir, str, ir_start);
	CPIN_64(ir, str, ir_length);
	}

	/**
	* gfs2_inum_range_out - Write out an inum range
	* @ir: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_inum_range_out(struct gfs2_inum_range ir, char buf)
	{
	struct gfs2_inum_range str = (struct gfs2_inum_range )buf;

	CPOUT_64(ir, str, ir_start);
	CPOUT_64(ir, str, ir_length);
	}

	/**
	* gfs2_inum_range_print - Print out an inum range
	* @ir: the cpu-order structure
	*
	*/

	void gfs2_inum_range_print(struct gfs2_inum_range *ir)
	{
	pv(ir, ir_start, "%"PRIu64);
	pv(ir, ir_length, "%"PRIu64);
	}

	/**
	* gfs2_statfs_change_in - Read in a statfs change
	* @sc: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_statfs_change_in(struct gfs2_statfs_change sc, char buf)
	{
	struct gfs2_statfs_change str = (struct gfs2_statfs_change )buf;

	CPIN_64(sc, str, sc_total);
	CPIN_64(sc, str, sc_free);
	CPIN_64(sc, str, sc_dinodes);
	}

	/**
	* gfs2_statfs_change_out - Write out a statfs change
	* @sc: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_statfs_change_out(struct gfs2_statfs_change sc, char buf)
	{
	struct gfs2_statfs_change str = (struct gfs2_statfs_change )buf;

	CPOUT_64(sc, str, sc_total);
	CPOUT_64(sc, str, sc_free);
	CPOUT_64(sc, str, sc_dinodes);
	}

	/**
	* gfs2_statfs_change_print - Print out a quota change
	* @sc: the cpu-order buffer
	*
	*/

	void gfs2_statfs_change_print(struct gfs2_statfs_change *sc)
	{
	pv(sc, sc_total, "%"PRId64);
	pv(sc, sc_free, "%"PRId64);
	pv(sc, sc_dinodes, "%"PRId64);
	}

	/**
	* gfs2_unlinked_tag_in - Read in an unlinked tag
	* @ut: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_unlinked_tag_in(struct gfs2_unlinked_tag ut, char buf)
	{
	struct gfs2_unlinked_tag str = (struct gfs2_unlinked_tag )buf;

	gfs2_inum_in(&ut->ut_inum, buf);
	CPIN_32(ut, str, ut_flags);
	CPIN_32(ut, str, ut_pad);
	}

	/**
	* gfs2_unlinked_tag_out - Write out an unlinked tag
	* @ut: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_unlinked_tag_out(struct gfs2_unlinked_tag ut, char buf)
	{
	struct gfs2_unlinked_tag str = (struct gfs2_unlinked_tag )buf;

	gfs2_inum_out(&ut->ut_inum, buf);
	CPOUT_32(ut, str, ut_flags);
	CPOUT_32(ut, str, ut_pad);
	}

	/**
	* gfs2_unlinked_tag_print - Print out an unlinked tag
	* @ut: the cpu-order structure
	*
	*/

	void gfs2_unlinked_tag_print(struct gfs2_unlinked_tag *ut)
	{
	gfs2_inum_print(&ut->ut_inum);
	pv(ut, ut_flags, "%u");
	pv(ut, ut_pad, "%u");
	}

	/**
	* gfs2_quota_change_in - Read in a quota change
	* @qc: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_quota_change_in(struct gfs2_quota_change qc, char buf)
	{
	struct gfs2_quota_change str = (struct gfs2_quota_change )buf;

	CPIN_64(qc, str, qc_change);
	CPIN_32(qc, str, qc_flags);
	CPIN_32(qc, str, qc_id);
	}

	/**
	* gfs2_quota_change_out - Write out a quota change
	* @qc: the cpu-order structure
	* @buf: the disk-order buffer
	*
	*/

	void gfs2_quota_change_out(struct gfs2_quota_change qc, char buf)
	{
	struct gfs2_quota_change str = (struct gfs2_quota_change )buf;

	CPOUT_64(qc, str, qc_change);
	CPOUT_32(qc, str, qc_flags);
	CPOUT_32(qc, str, qc_id);
	}

	/**
	* gfs2_quota_change_print - Print out a quota change
	* @qc: the cpu-order buffer
	*
	*/

	void gfs2_quota_change_print(struct gfs2_quota_change *qc)
	{
	pv(qc, qc_change, "%"PRId64);
	pv(qc, qc_flags, "0x%.8X");
	pv(qc, qc_id, "%u");
	}

	static const uint32_t crc_32_tab[] =
	{
	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
	0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
	0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
	0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
	0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
	0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
	0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
	0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
	0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
	0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
	0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
	0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
	0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
	0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
	0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
	0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
	0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
	0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
	0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
	0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
	};

	/**
	* gfs2_disk_hash - hash an array of data
	* @data: the data to be hashed
	* @len: the length of data to be hashed
	*
	* Take some data and convert it to a 32-bit hash.
	*
	* The hash function is a 32-bit CRC of the data. The algorithm uses
	* the crc_32_tab table above.
	*
	* This may not be the fastest hash function, but it does a fair bit better
	* at providing uniform results than the others I've looked at. That's
	* really important for efficient directories.
	*
	* Returns: the hash
	*/

	uint32_t gfs2_disk_hash(const char *data, int len)
	{
	uint32_t hash = 0xFFFFFFFF;

	for (; len--; data++)
	hash = crc_32_tab[(hash ^ *data) & 0xFF] ^ (hash >> 8);

	hash = ~hash;

	return hash;
	}

	#endif /* WANT_GFS2_CONVERSION_FUNCTIONS */

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