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Rework DMAPI bulkstat calls in such a way that we can directly extract inline attributes out of the bulkstat buffer (for that case), rather than using an (extremely expensive for large icount filesystems) iget for fetching attrs.
Merge of xfs-linux-melb:xfs-kern:26602a by kenmcd.

/*
 * Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms 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.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_ITABLE_H__
#define	__XFS_ITABLE_H__

/*
 * xfs_bulkstat() is used to fill in xfs_bstat structures as well as dm_stat
 * structures (by the dmi library). This is a pointer to a formatter function
 * that will iget the inode and fill in the appropriate structure.
 * see xfs_bulkstat_one() and xfs_dm_bulkstat_one() in dmapi_xfs.c
 */
typedef int (*bulkstat_one_pf)(struct xfs_mount	*mp,
			       xfs_ino_t	ino,
			       void		__user *buffer,
			       int		ubsize,
			       void		*private_data,
			       xfs_daddr_t	bno,
			       int		*ubused,
			       void		*dip,
			       int		*stat);

/*
 * Values for stat return value.
 */
#define BULKSTAT_RV_NOTHING	0
#define BULKSTAT_RV_DIDONE	1
#define BULKSTAT_RV_GIVEUP	2

/*
 * Values for bulkstat flag argument.
 */
#define BULKSTAT_FG_IGET	0x1	/* Go through the buffer cache */
#define BULKSTAT_FG_QUICK	0x2	/* No iget, walk the dinode cluster */
#define BULKSTAT_FG_INLINE	0x4	/* No iget if inline attrs */

/*
 * Return stat information in bulk (by-inode) for the filesystem.
 */
int					/* error status */
xfs_bulkstat(
	xfs_mount_t	*mp,		/* mount point for filesystem */
	xfs_ino_t	*lastino,	/* last inode returned */
	int		*count,		/* size of buffer/count returned */
	bulkstat_one_pf formatter,	/* func that'd fill a single buf */
	void		*private_data,	/* private data for formatter */
	size_t		statstruct_size,/* sizeof struct that we're filling */
	char		__user *ubuffer,/* buffer with inode stats */
	int		flags,		/* flag to control access method */
	int		*done);		/* 1 if there are more stats to get */

int
xfs_bulkstat_single(
	xfs_mount_t		*mp,
	xfs_ino_t		*lastinop,
	char			__user *buffer,
	int			*done);

int
xfs_bulkstat_one(
	xfs_mount_t		*mp,
	xfs_ino_t		ino,
	void			__user *buffer,
	int			ubsize,
	void			*private_data,
	xfs_daddr_t		bno,
	int			*ubused,
	void			*dibuff,
	int			*stat);

int					/* error status */
xfs_inumbers(
	xfs_mount_t		*mp,	/* mount point for filesystem */
	xfs_ino_t		*last,	/* last inode returned */
	int			*count,	/* size of buffer/count returned */
	xfs_inogrp_t		__user *buffer);/* buffer with inode info */

#endif	/* __XFS_ITABLE_H__ */