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This is a two fold change, first it moves the translation
between linux dev_t and kdev_t up the call stack in xfs
and makes the bulk of xfs work in terms of its on disk
dev_t format. It also cleans up a few related chunks of
code.

The other part of the change reworks how we keep the linux
inode contents and the xfs inode fields in sync. A number
of places where we resynced the two have been removed, these
were basically replicating work elsewhere in the filesystem.
We now also ensure that the inode fields are filled in
before calling unlock_new_inode - there used to be a window.
Finally all the code which hooks together the linux inode
and the xfs inode is brought together as a more coherent
whole rather than being scattered around the inode create
path. Most calls to revalidate the linux inode from the
xfs inode are removed.
Change xfs dev_t manipulation macros to be XFS_ from IRIX_

/*
 * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.	 Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */
#ifndef __XFS_TYPES_H__
#define __XFS_TYPES_H__

#ifdef __KERNEL__

#include <linux/types.h>

/*
 * POSIX Extensions
 */
typedef unsigned char		uchar_t;
typedef unsigned short		ushort_t;
typedef unsigned int		uint_t;
typedef unsigned long		ulong_t;

/*
 * Additional type declarations for XFS
 */
typedef signed char		__int8_t;
typedef unsigned char		__uint8_t;
typedef signed short int	__int16_t;
typedef unsigned short int	__uint16_t;
typedef signed int		__int32_t;
typedef unsigned int		__uint32_t;
typedef signed long long int	__int64_t;
typedef unsigned long long int	__uint64_t;

typedef enum { B_FALSE, B_TRUE } boolean_t;


typedef __int64_t		prid_t;		/* project ID */
typedef __uint32_t		inst_t;		/* an instruction */

typedef __u64			xfs_off_t;
typedef __u64			xfs_ino_t;	/* <inode> type */
typedef __s64			xfs_daddr_t;	/* <disk address> type */
typedef char *			xfs_caddr_t;	/* <core address> type */
typedef __u32			xfs_dev_t;

typedef struct timespec		timespec_t;

typedef struct {
	unsigned char	__u_bits[16];
} uuid_t;

/* __psint_t is the same size as a pointer */
#if (BITS_PER_LONG == 32)
typedef __int32_t __psint_t;
typedef __uint32_t __psunsigned_t;
#elif (BITS_PER_LONG == 64)
typedef __int64_t __psint_t;
typedef __uint64_t __psunsigned_t;
#else
#error BITS_PER_LONG must be 32 or 64
#endif

#endif	/* __KERNEL__ */

/*
 * Some types are conditional based on the selected configuration.
 * Set XFS_BIG_FILESYSTEMS=1 or 0 depending on the desired configuration.
 * XFS_BIG_FILESYSTEMS needs daddr_t to be 64 bits
 *
 * On linux right now we are limited to 2^32 512 byte blocks in a
 * filesystem, Once this limit is changed, setting this to 1
 * will allow XFS to go larger. With BIG_FILESYSTEMS set to 0
 * a 4K block filesystem could still theoretically be 16Gbytes
 * long, so on an ia32 box the 32 bit page index will then be
 * the limiting factor.
 */

#ifndef XFS_BIG_FILESYSTEMS
#define XFS_BIG_FILESYSTEMS	0
#endif

typedef __uint32_t	xfs_agblock_t;	/* blockno in alloc. group */
typedef __uint32_t	xfs_extlen_t;	/* extent length in blocks */
typedef __uint32_t	xfs_agnumber_t; /* allocation group number */
typedef __int32_t	xfs_extnum_t;	/* # of extents in a file */
typedef __int16_t	xfs_aextnum_t;	/* # extents in an attribute fork */
typedef __int64_t	xfs_fsize_t;	/* bytes in a file */
typedef __uint64_t	xfs_ufsize_t;	/* unsigned bytes in a file */

typedef __int32_t	xfs_suminfo_t;	/* type of bitmap summary info */
typedef __int32_t	xfs_rtword_t;	/* word type for bitmap manipulations */

typedef __int64_t	xfs_lsn_t;	/* log sequence number */
typedef __int32_t	xfs_tid_t;	/* transaction identifier */

typedef __uint32_t	xfs_dablk_t;	/* dir/attr block number (in file) */
typedef __uint32_t	xfs_dahash_t;	/* dir/attr hash value */

typedef __uint16_t	xfs_prid_t;	/* prid_t truncated to 16bits in XFS */

/*
 * These types are 64 bits on disk but are either 32 or 64 bits in memory.
 * Disk based types:
 */
typedef __uint64_t	xfs_dfsbno_t;	/* blockno in filesystem (agno|agbno) */
typedef __uint64_t	xfs_drfsbno_t;	/* blockno in filesystem (raw) */
typedef __uint64_t	xfs_drtbno_t;	/* extent (block) in realtime area */
typedef __uint64_t	xfs_dfiloff_t;	/* block number in a file */
typedef __uint64_t	xfs_dfilblks_t; /* number of blocks in a file */

/*
 * Memory based types are conditional.
 */
#if XFS_BIG_FILESYSTEMS
typedef __uint64_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
typedef __uint64_t	xfs_rfsblock_t; /* blockno in filesystem (raw) */
typedef __uint64_t	xfs_rtblock_t;	/* extent (block) in realtime area */
typedef __int64_t	xfs_srtblock_t; /* signed version of xfs_rtblock_t */
#else
typedef __uint32_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
typedef __uint32_t	xfs_rfsblock_t; /* blockno in filesystem (raw) */
typedef __uint32_t	xfs_rtblock_t;	/* extent (block) in realtime area */
typedef __int32_t	xfs_srtblock_t; /* signed version of xfs_rtblock_t */
#endif
typedef __uint64_t	xfs_fileoff_t;	/* block number in a file */
typedef __int64_t	xfs_sfiloff_t;	/* signed block number in a file */
typedef __uint64_t	xfs_filblks_t;	/* number of blocks in a file */

typedef __uint8_t	xfs_arch_t;	/* architecutre of an xfs fs */

/*
 * Null values for the types.
 */
#define NULLDFSBNO	((xfs_dfsbno_t)-1)
#define NULLDRFSBNO	((xfs_drfsbno_t)-1)
#define NULLDRTBNO	((xfs_drtbno_t)-1)
#define NULLDFILOFF	((xfs_dfiloff_t)-1)

#define NULLFSBLOCK	((xfs_fsblock_t)-1)
#define NULLRFSBLOCK	((xfs_rfsblock_t)-1)
#define NULLRTBLOCK	((xfs_rtblock_t)-1)
#define NULLFILEOFF	((xfs_fileoff_t)-1)

#define NULLAGBLOCK	((xfs_agblock_t)-1)
#define NULLAGNUMBER	((xfs_agnumber_t)-1)
#define NULLEXTNUM	((xfs_extnum_t)-1)

#define NULLCOMMITLSN	((xfs_lsn_t)-1)

/*
 * Max values for extlen, extnum, aextnum.
 */
#define MAXEXTLEN	((xfs_extlen_t)0x001fffff)	/* 21 bits */
#define MAXEXTNUM	((xfs_extnum_t)0x7fffffff)	/* signed int */
#define MAXAEXTNUM	((xfs_aextnum_t)0x7fff)		/* signed short */

/*
 * MAXNAMELEN is the length (including the terminating null) of
 * the longest permissible file (component) name.
 */
#define MAXNAMELEN	256

typedef enum {
	XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
} xfs_lookup_t;

typedef enum {
	XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
	XFS_BTNUM_MAX
} xfs_btnum_t;


#if defined(CONFIG_PROC_FS) && defined(__KERNEL__) && !defined(XFS_STATS_OFF)
/*
 * XFS global statistics
 */
struct xfsstats {
# define XFSSTAT_END_EXTENT_ALLOC	4
	__uint32_t		xs_allocx;
	__uint32_t		xs_allocb;
	__uint32_t		xs_freex;
	__uint32_t		xs_freeb;
# define XFSSTAT_END_ALLOC_BTREE	(XFSSTAT_END_EXTENT_ALLOC+4)
	__uint32_t		xs_abt_lookup;
	__uint32_t		xs_abt_compare;
	__uint32_t		xs_abt_insrec;
	__uint32_t		xs_abt_delrec;
# define XFSSTAT_END_BLOCK_MAPPING	(XFSSTAT_END_ALLOC_BTREE+7)
	__uint32_t		xs_blk_mapr;
	__uint32_t		xs_blk_mapw;
	__uint32_t		xs_blk_unmap;
	__uint32_t		xs_add_exlist;
	__uint32_t		xs_del_exlist;
	__uint32_t		xs_look_exlist;
	__uint32_t		xs_cmp_exlist;
# define XFSSTAT_END_BLOCK_MAP_BTREE	(XFSSTAT_END_BLOCK_MAPPING+4)
	__uint32_t		xs_bmbt_lookup;
	__uint32_t		xs_bmbt_compare;
	__uint32_t		xs_bmbt_insrec;
	__uint32_t		xs_bmbt_delrec;
# define XFSSTAT_END_DIRECTORY_OPS	(XFSSTAT_END_BLOCK_MAP_BTREE+4)
	__uint32_t		xs_dir_lookup;
	__uint32_t		xs_dir_create;
	__uint32_t		xs_dir_remove;
	__uint32_t		xs_dir_getdents;
# define XFSSTAT_END_TRANSACTIONS	(XFSSTAT_END_DIRECTORY_OPS+3)
	__uint32_t		xs_trans_sync;
	__uint32_t		xs_trans_async;
	__uint32_t		xs_trans_empty;
# define XFSSTAT_END_INODE_OPS		(XFSSTAT_END_TRANSACTIONS+7)
	__uint32_t		xs_ig_attempts;
	__uint32_t		xs_ig_found;
	__uint32_t		xs_ig_frecycle;
	__uint32_t		xs_ig_missed;
	__uint32_t		xs_ig_dup;
	__uint32_t		xs_ig_reclaims;
	__uint32_t		xs_ig_attrchg;
# define XFSSTAT_END_LOG_OPS		(XFSSTAT_END_INODE_OPS+5)
	__uint32_t		xs_log_writes;
	__uint32_t		xs_log_blocks;
	__uint32_t		xs_log_noiclogs;
	__uint32_t		xs_log_force;
	__uint32_t		xs_log_force_sleep;
# define XFSSTAT_END_TAIL_PUSHING	(XFSSTAT_END_LOG_OPS+10)
	__uint32_t		xs_try_logspace;
	__uint32_t		xs_sleep_logspace;
	__uint32_t		xs_push_ail;
	__uint32_t		xs_push_ail_success;
	__uint32_t		xs_push_ail_pushbuf;
	__uint32_t		xs_push_ail_pinned;
	__uint32_t		xs_push_ail_locked;
	__uint32_t		xs_push_ail_flushing;
	__uint32_t		xs_push_ail_restarts;
	__uint32_t		xs_push_ail_flush;
# define XFSSTAT_END_WRITE_CONVERT	(XFSSTAT_END_TAIL_PUSHING+2)
	__uint32_t		xs_xstrat_quick;
	__uint32_t		xs_xstrat_split;
# define XFSSTAT_END_READ_WRITE_OPS	(XFSSTAT_END_WRITE_CONVERT+2)
	__uint32_t		xs_write_calls;
	__uint32_t		xs_read_calls;
# define XFSSTAT_END_ATTRIBUTE_OPS	(XFSSTAT_END_READ_WRITE_OPS+4)
	__uint32_t		xs_attr_get;
	__uint32_t		xs_attr_set;
	__uint32_t		xs_attr_remove;
	__uint32_t		xs_attr_list;
# define XFSSTAT_END_QUOTA_OPS		(XFSSTAT_END_ATTRIBUTE_OPS+8)
	__uint32_t		xs_qm_dqreclaims;
	__uint32_t		xs_qm_dqreclaim_misses;
	__uint32_t		xs_qm_dquot_dups;
	__uint32_t		xs_qm_dqcachemisses;
	__uint32_t		xs_qm_dqcachehits;
	__uint32_t		xs_qm_dqwants;
	__uint32_t		xs_qm_dqshake_reclaims;
	__uint32_t		xs_qm_dqinact_reclaims;
# define XFSSTAT_END_INODE_CLUSTER	(XFSSTAT_END_QUOTA_OPS+3)
	__uint32_t		xs_iflush_count;
	__uint32_t		xs_icluster_flushcnt;
	__uint32_t		xs_icluster_flushinode;
# define XFSSTAT_END_VNODE_OPS		(XFSSTAT_END_INODE_CLUSTER+8)
	__uint32_t		vn_active;	/* # vnodes not on free lists */
	__uint32_t		vn_alloc;	/* # times vn_alloc called */
	__uint32_t		vn_get;		/* # times vn_get called */
	__uint32_t		vn_hold;	/* # times vn_hold called */
	__uint32_t		vn_rele;	/* # times vn_rele called */
	__uint32_t		vn_reclaim;	/* # times vn_reclaim called */
	__uint32_t		vn_remove;	/* # times vn_remove called */
	__uint32_t		vn_free;	/* # times vn_free called */
/* Extra precision counters */
	__uint64_t		xs_xstrat_bytes;
	__uint64_t		xs_write_bytes;
	__uint64_t		xs_read_bytes;
};

extern struct xfsstats xfsstats;

# define XFS_STATS_INC(count)		( (count)++ )
# define XFS_STATS_DEC(count)		( (count)-- )
# define XFS_STATS_ADD(count, inc)	( (count) += (inc) )
#else	/* !CONFIG_PROC_FS */
# define XFS_STATS_INC(count)
# define XFS_STATS_DEC(count)
# define XFS_STATS_ADD(count, inc)
#endif	/* !CONFIG_PROC_FS */



/* juggle IRIX device numbers - still used in ondisk structures */

#ifndef __KERNEL__
#define MKDEV(major, minor)	makedev(major, minor)
#endif

#define XFS_DEV_BITSMAJOR	14
#define XFS_DEV_BITSMINOR	18
#define XFS_DEV_MAXMAJ		0x1ff
#define XFS_DEV_MAXMIN		0x3ffff
#define XFS_DEV_MAJOR(dev)	((int)(((unsigned)(dev)>>XFS_DEV_BITSMINOR) \
				    & XFS_DEV_MAXMAJ))
#define XFS_DEV_MINOR(dev)	((int)((dev)&XFS_DEV_MAXMIN))
#define XFS_MKDEV(major,minor) ((xfs_dev_t)(((major)<<XFS_DEV_BITSMINOR) \
				    | (minor&XFS_DEV_MAXMIN)))

#define XFS_DEV_TO_KDEVT(dev)	mk_kdev(XFS_DEV_MAJOR(dev),XFS_DEV_MINOR(dev))

#endif	/* !__XFS_TYPES_H */