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Encumbrance review done.
Add copyright and license words consistent with GPL.
Refer to http://fsg.melbourne.sgi.com/reviews/ for details.

There is a slight change in the license terms and conditions words
to go with the copyrights, so most of the files are not getting
new GPL's, just updated versions ... but there are 20-30 more files
here as well.

/*
 * Copyright (C) 1999 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; either version 2 of the License, or (at
 * your option) any later version.
 * 
 * This program is distributed in the hope that it will 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */
#ifndef _FS_XFS_BTREE_H
#define	_FS_XFS_BTREE_H

#ident "$Revision: 1.46 $"

struct xfs_buf;
struct xfs_bmap_free;
struct xfs_inode;
struct xfs_mount;
struct xfs_trans;

/*
 * This nonsense is to make -wlint happy.
 */
#define	XFS_LOOKUP_EQ	((xfs_lookup_t)XFS_LOOKUP_EQi)
#define	XFS_LOOKUP_LE	((xfs_lookup_t)XFS_LOOKUP_LEi)
#define	XFS_LOOKUP_GE	((xfs_lookup_t)XFS_LOOKUP_GEi)

#define	XFS_BTNUM_BNO	((xfs_btnum_t)XFS_BTNUM_BNOi)
#define	XFS_BTNUM_CNT	((xfs_btnum_t)XFS_BTNUM_CNTi)
#define	XFS_BTNUM_BMAP	((xfs_btnum_t)XFS_BTNUM_BMAPi)
#define	XFS_BTNUM_INO	((xfs_btnum_t)XFS_BTNUM_INOi)

/*
 * Short form header: space allocation btrees.
 */
typedef struct xfs_btree_sblock
{
	__uint32_t	bb_magic;	/* magic number for block type */
	__uint16_t	bb_level;	/* 0 is a leaf */
	__uint16_t	bb_numrecs;	/* current # of data records */
	xfs_agblock_t	bb_leftsib;	/* left sibling block or NULLAGBLOCK */
	xfs_agblock_t	bb_rightsib;	/* right sibling block or NULLAGBLOCK */
} xfs_btree_sblock_t;

/*
 * Long form header: bmap btrees.
 */
typedef struct xfs_btree_lblock
{
	__uint32_t	bb_magic;	/* magic number for block type */
	__uint16_t	bb_level;	/* 0 is a leaf */
	__uint16_t	bb_numrecs;	/* current # of data records */
	xfs_dfsbno_t	bb_leftsib;	/* left sibling block or NULLDFSBNO */
	xfs_dfsbno_t	bb_rightsib;	/* right sibling block or NULLDFSBNO */
} xfs_btree_lblock_t;

/*
 * Combined header and structure, used by common code.
 */
typedef struct xfs_btree_hdr
{
	__uint32_t	bb_magic;	/* magic number for block type */
	__uint16_t	bb_level;	/* 0 is a leaf */
	__uint16_t	bb_numrecs;	/* current # of data records */
} xfs_btree_hdr_t;

typedef struct xfs_btree_block
{
	xfs_btree_hdr_t	bb_h;		/* header */
	union		{
		struct	{
			xfs_agblock_t	bb_leftsib;
			xfs_agblock_t	bb_rightsib;
		}	s;		/* short form pointers */
		struct	{
			xfs_dfsbno_t	bb_leftsib;
			xfs_dfsbno_t	bb_rightsib;
		}	l;		/* long form pointers */
	}		bb_u;		/* rest */
} xfs_btree_block_t;

/*
 * For logging record fields.
 */
#define	XFS_BB_MAGIC		0x01
#define	XFS_BB_LEVEL		0x02
#define	XFS_BB_NUMRECS		0x04
#define	XFS_BB_LEFTSIB		0x08
#define	XFS_BB_RIGHTSIB		0x10
#define	XFS_BB_NUM_BITS		5
#define	XFS_BB_ALL_BITS		((1 << XFS_BB_NUM_BITS) - 1)

/*
 * Boolean to select which form of xfs_btree_block_t.bb_u to use.
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BTREE_LONG_PTRS)
int xfs_btree_long_ptrs(xfs_btnum_t btnum);
#define	XFS_BTREE_LONG_PTRS(btnum)	((btnum) == XFS_BTNUM_BMAP)
#else
#define	XFS_BTREE_LONG_PTRS(btnum)	((btnum) == XFS_BTNUM_BMAP)
#endif

/*
 * Magic numbers for btree blocks.
 */
extern const __uint32_t	xfs_magics[];

/*
 * Maximum and minimum records in a btree block.
 * Given block size, type prefix, and leaf flag (0 or 1).
 * The divisor below is equivalent to lf ? (e1) : (e2) but that produces
 * compiler warnings.
 */
#define	XFS_BTREE_BLOCK_MAXRECS(bsz,t,lf)	\
	((int)(((bsz) - (uint)sizeof(t ## _block_t)) / \
	 (((lf) * (uint)sizeof(t ## _rec_t)) + \
	  ((1 - (lf)) * \
	   ((uint)sizeof(t ## _key_t) + (uint)sizeof(t ## _ptr_t))))))
#define	XFS_BTREE_BLOCK_MINRECS(bsz,t,lf)	\
	(XFS_BTREE_BLOCK_MAXRECS(bsz,t,lf) / 2)

/*
 * Record, key, and pointer address calculation macros.
 * Given block size, type prefix, block pointer, and index of requested entry
 * (first entry numbered 1).
 */
#define	XFS_BTREE_REC_ADDR(bsz,t,bb,i,mxr)	\
	((t ## _rec_t *)((char *)(bb) + sizeof(t ## _block_t) + \
	 ((i) - 1) * sizeof(t ## _rec_t)))
#define	XFS_BTREE_KEY_ADDR(bsz,t,bb,i,mxr)	\
	((t ## _key_t *)((char *)(bb) + sizeof(t ## _block_t) + \
	 ((i) - 1) * sizeof(t ## _key_t)))
#define	XFS_BTREE_PTR_ADDR(bsz,t,bb,i,mxr)	\
	((t ## _ptr_t *)((char *)(bb) + sizeof(t ## _block_t) + \
	 (mxr) * sizeof(t ## _key_t) + ((i) - 1) * sizeof(t ## _ptr_t)))

#define	XFS_BTREE_MAXLEVELS	8	/* max of all btrees */

/*
 * Btree cursor structure.
 * This collects all information needed by the btree code in one place.
 */
typedef struct xfs_btree_cur
{
	struct xfs_trans	*bc_tp;	/* transaction we're in, if any */
	struct xfs_mount	*bc_mp;	/* file system mount struct */
	union {
		xfs_alloc_rec_t		a;
		xfs_bmbt_irec_t		b;
		xfs_inobt_rec_t		i;
	}		bc_rec;		/* current insert/search record value */
	struct xfs_buf	*bc_bufs[XFS_BTREE_MAXLEVELS];	/* buf ptr per level */
	int		bc_ptrs[XFS_BTREE_MAXLEVELS];	/* key/record # */
	__uint8_t	bc_ra[XFS_BTREE_MAXLEVELS];	/* readahead bits */
#define	XFS_BTCUR_LEFTRA	1	/* left sibling has been read-ahead */
#define	XFS_BTCUR_RIGHTRA	2	/* right sibling has been read-ahead */
	__uint8_t	bc_nlevels;	/* number of levels in the tree */
	__uint8_t	bc_blocklog;	/* log2(blocksize) of btree blocks */
	xfs_btnum_t	bc_btnum;	/* identifies which btree type */
	union {
		struct {			/* needed for BNO, CNT */
			struct xfs_buf	*agbp;	/* agf buffer pointer */
			xfs_agnumber_t	agno;	/* ag number */
		} a;
		struct {			/* needed for BMAP */
			struct xfs_inode *ip;	/* pointer to our inode */
			struct xfs_bmap_free *flist;	/* list to free after */
			xfs_fsblock_t	firstblock;	/* 1st blk allocated */
			int		allocated;	/* count of alloced */
			short		forksize;	/* fork's inode space */
			char		whichfork;	/* data or attr fork */
			char		flags;		/* flags */
#define	XFS_BTCUR_BPRV_WASDEL	1			/* was delayed */
		} b;
		struct {			/* needed for INO */
			struct xfs_buf	*agbp;	/* agi buffer pointer */
			xfs_agnumber_t	agno;	/* ag number */
		} i;
	}		bc_private;	/* per-btree type data */
} xfs_btree_cur_t;

/*
 * Convert from buffer to btree block header.
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_BLOCK)
xfs_btree_block_t *xfs_buf_to_block(struct xfs_buf *bp);
#define	XFS_BUF_TO_BLOCK(bp)	xfs_buf_to_block(bp)
#else
#define	XFS_BUF_TO_BLOCK(bp)	((xfs_btree_block_t *)(XFS_BUF_PTR(bp)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_LBLOCK)
xfs_btree_lblock_t *xfs_buf_to_lblock(struct xfs_buf *bp);
#define	XFS_BUF_TO_LBLOCK(bp)	xfs_buf_to_lblock(bp)
#else
#define	XFS_BUF_TO_LBLOCK(bp)	((xfs_btree_lblock_t *)(XFS_BUF_PTR(bp)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_SBLOCK)
xfs_btree_sblock_t *xfs_buf_to_sblock(struct xfs_buf *bp);
#define	XFS_BUF_TO_SBLOCK(bp)	xfs_buf_to_sblock(bp)
#else
#define	XFS_BUF_TO_SBLOCK(bp)	((xfs_btree_sblock_t *)(XFS_BUF_PTR(bp)))
#endif

#ifdef DEBUG
/*
 * Debug routine: check that block header is ok.
 */
void
xfs_btree_check_block(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	xfs_btree_block_t	*block,	/* generic btree block pointer */
	int			level,	/* level of the btree block */
	struct xfs_buf		*bp);	/* buffer containing block, if any */

/*
 * Debug routine: check that keys are in the right order.
 */
void
xfs_btree_check_key(
	xfs_btnum_t		btnum,	/* btree identifier */
	void			*ak1,	/* pointer to left (lower) key */
	void			*ak2);	/* pointer to right (higher) key */

/*
 * Debug routine: check that records are in the right order.
 */
void
xfs_btree_check_rec(
	xfs_btnum_t		btnum,	/* btree identifier */
	void			*ar1,	/* pointer to left (lower) record */
	void			*ar2);	/* pointer to right (higher) record */
#else
#define	xfs_btree_check_block(a,b,c,d)
#define	xfs_btree_check_key(a,b,c)
#define	xfs_btree_check_rec(a,b,c)
#endif	/* DEBUG */

/*
 * Checking routine: check that long form block header is ok.
 */
int					/* error (0 or EFSCORRUPTED) */
xfs_btree_check_lblock(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	xfs_btree_lblock_t	*block,	/* btree long form block pointer */
	int			level,	/* level of the btree block */
	struct xfs_buf		*bp);	/* buffer containing block, if any */

/*
 * Checking routine: check that (long) pointer is ok.
 */
int					/* error (0 or EFSCORRUPTED) */
xfs_btree_check_lptr(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	xfs_dfsbno_t		ptr,	/* btree block disk address */
	int			level);	/* btree block level */

/*
 * Checking routine: check that short form block header is ok.
 */
int					/* error (0 or EFSCORRUPTED) */
xfs_btree_check_sblock(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	xfs_btree_sblock_t	*block,	/* btree short form block pointer */
	int			level,	/* level of the btree block */
	struct xfs_buf		*bp);	/* buffer containing block */

/*
 * Checking routine: check that (short) pointer is ok.
 */
int					/* error (0 or EFSCORRUPTED) */
xfs_btree_check_sptr(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	xfs_agblock_t		ptr,	/* btree block disk address */
	int			level);	/* btree block level */

/*
 * Delete the btree cursor.
 */
void
xfs_btree_del_cursor(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	int			error);	/* del because of error */

/*
 * Values for the error parameter of xfs_btree_del_cursor().
 */
#define	XFS_BTREE_NOERROR	0
#define	XFS_BTREE_ERROR		1

/*
 * Duplicate the btree cursor.
 * Allocate a new one, copy the record, re-get the buffers.
 */
int					/* error */
xfs_btree_dup_cursor(
	xfs_btree_cur_t		*cur,	/* input cursor */
	xfs_btree_cur_t		**ncur);/* output cursor */

/*
 * Change the cursor to point to the first record in the current block
 * at the given level.  Other levels are unaffected.
 */
int					/* success=1, failure=0 */
xfs_btree_firstrec(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	int			level);	/* level to change */

/*
 * Retrieve the block pointer from the cursor at the given level.
 * This may be a bmap btree root or from a buffer.
 */
xfs_btree_block_t *			/* generic btree block pointer */
xfs_btree_get_block(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	int			level,	/* level in btree */
	struct xfs_buf		**bpp);	/* buffer containing the block */

/*
 * Get a buffer for the block, return it with no data read.
 * Long-form addressing.
 */
struct xfs_buf *				/* buffer for fsbno */
xfs_btree_get_bufl(
	struct xfs_mount	*mp,	/* file system mount point */
	struct xfs_trans	*tp,	/* transaction pointer */
	xfs_fsblock_t		fsbno,	/* file system block number */
	uint			lock);	/* lock flags for get_buf */

/*
 * Get a buffer for the block, return it with no data read.
 * Short-form addressing.
 */
struct xfs_buf *				/* buffer for agno/agbno */
xfs_btree_get_bufs(
	struct xfs_mount	*mp,	/* file system mount point */
	struct xfs_trans	*tp,	/* transaction pointer */
	xfs_agnumber_t		agno,	/* allocation group number */
	xfs_agblock_t		agbno,	/* allocation group block number */
	uint			lock);	/* lock flags for get_buf */

/* 
 * Allocate a new btree cursor.
 * The cursor is either for allocation (A) or bmap (B).
 */
xfs_btree_cur_t *			/* new btree cursor */
xfs_btree_init_cursor(
	struct xfs_mount	*mp,	/* file system mount point */
	struct xfs_trans	*tp,	/* transaction pointer */
	struct xfs_buf		*agbp,	/* (A only) buffer for agf structure */
	xfs_agnumber_t		agno,	/* (A only) allocation group number */
	xfs_btnum_t		btnum,	/* btree identifier */
	struct xfs_inode	*ip,	/* (B only) inode owning the btree */
	int			whichfork); /* (B only) data/attr fork */

/*
 * Check for the cursor referring to the last block at the given level.
 */
int					/* 1=is last block, 0=not last block */
xfs_btree_islastblock(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	int			level);	/* level to check */

/*
 * Change the cursor to point to the last record in the current block
 * at the given level.  Other levels are unaffected.
 */
int					/* success=1, failure=0 */
xfs_btree_lastrec(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	int			level);	/* level to change */

/*
 * Compute first and last byte offsets for the fields given.
 * Interprets the offsets table, which contains struct field offsets.
 */
void
xfs_btree_offsets(
	__int64_t		fields,	/* bitmask of fields */
	const short		*offsets,/* table of field offsets */
	int			nbits,	/* number of bits to inspect */
	int			*first,	/* output: first byte offset */
	int			*last);	/* output: last byte offset */

/*
 * Get a buffer for the block, return it read in.
 * Long-form addressing.
 */
int					/* error */
xfs_btree_read_bufl(
	struct xfs_mount	*mp,	/* file system mount point */
	struct xfs_trans	*tp,	/* transaction pointer */
	xfs_fsblock_t		fsbno,	/* file system block number */
	uint			lock,	/* lock flags for read_buf */
	struct xfs_buf		**bpp,	/* buffer for fsbno */
	int			refval);/* ref count value for buffer */

/*
 * Get a buffer for the block, return it read in.
 * Short-form addressing.
 */
int					/* error */
xfs_btree_read_bufs(
	struct xfs_mount	*mp,	/* file system mount point */
	struct xfs_trans	*tp,	/* transaction pointer */
	xfs_agnumber_t		agno,	/* allocation group number */
	xfs_agblock_t		agbno,	/* allocation group block number */
	uint			lock,	/* lock flags for read_buf */
	struct xfs_buf		**bpp,	/* buffer for agno/agbno */
	int			refval);/* ref count value for buffer */

/*
 * Read-ahead the block, don't wait for it, don't return a buffer.
 * Long-form addressing.
 */
void					/* error */
xfs_btree_reada_bufl(
	struct xfs_mount	*mp,	/* file system mount point */
	xfs_fsblock_t		fsbno,	/* file system block number */
	xfs_extlen_t		count);	/* count of filesystem blocks */

/*
 * Read-ahead the block, don't wait for it, don't return a buffer.
 * Short-form addressing.
 */
void					/* error */
xfs_btree_reada_bufs(
	struct xfs_mount	*mp,	/* file system mount point */
	xfs_agnumber_t		agno,	/* allocation group number */
	xfs_agblock_t		agbno,	/* allocation group block number */
	xfs_extlen_t		count);	/* count of filesystem blocks */

/*
 * Read-ahead btree blocks, at the given level.
 * Bits in lr are set from XFS_BTCUR_{LEFT,RIGHT}RA.
 */
int					/* readahead block count */
xfs_btree_readahead(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	int			lev,	/* level in btree */
	int			lr);	/* left/right bits */
/*
 * Set the buffer for level "lev" in the cursor to bp, releasing
 * any previous buffer.
 */
void
xfs_btree_setbuf(
	xfs_btree_cur_t		*cur,	/* btree cursor */
	int			lev,	/* level in btree */
	struct xfs_buf		*bp);	/* new buffer to set */

/*
 * Min and max functions for extlen, agblock, fileoff, and filblks types.
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_EXTLEN_MIN)
xfs_extlen_t xfs_extlen_min(xfs_extlen_t a, xfs_extlen_t b);
#define	XFS_EXTLEN_MIN(a,b)	xfs_extlen_min(a,b)
#else
#define	XFS_EXTLEN_MIN(a,b)	\
	((xfs_extlen_t)(a) < (xfs_extlen_t)(b) ? \
	 (xfs_extlen_t)(a) : (xfs_extlen_t)(b))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_EXTLEN_MAX)
xfs_extlen_t xfs_extlen_max(xfs_extlen_t a, xfs_extlen_t b);
#define	XFS_EXTLEN_MAX(a,b)	xfs_extlen_max(a,b)
#else
#define	XFS_EXTLEN_MAX(a,b)	\
	((xfs_extlen_t)(a) > (xfs_extlen_t)(b) ? \
	 (xfs_extlen_t)(a) : (xfs_extlen_t)(b))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGBLOCK_MIN)
xfs_agblock_t xfs_agblock_min(xfs_agblock_t a, xfs_agblock_t b);
#define	XFS_AGBLOCK_MIN(a,b)	xfs_agblock_min(a,b)
#else
#define	XFS_AGBLOCK_MIN(a,b)	\
	((xfs_agblock_t)(a) < (xfs_agblock_t)(b) ? \
	 (xfs_agblock_t)(a) : (xfs_agblock_t)(b))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGBLOCK_MAX)
xfs_agblock_t xfs_agblock_max(xfs_agblock_t a, xfs_agblock_t b);
#define	XFS_AGBLOCK_MAX(a,b)	xfs_agblock_max(a,b)
#else
#define	XFS_AGBLOCK_MAX(a,b)	\
	((xfs_agblock_t)(a) > (xfs_agblock_t)(b) ? \
	 (xfs_agblock_t)(a) : (xfs_agblock_t)(b))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FILEOFF_MIN)
xfs_fileoff_t xfs_fileoff_min(xfs_fileoff_t a, xfs_fileoff_t b);
#define	XFS_FILEOFF_MIN(a,b)	xfs_fileoff_min(a,b)
#else
#define	XFS_FILEOFF_MIN(a,b)	\
	((xfs_fileoff_t)(a) < (xfs_fileoff_t)(b) ? \
	 (xfs_fileoff_t)(a) : (xfs_fileoff_t)(b))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FILEOFF_MAX)
xfs_fileoff_t xfs_fileoff_max(xfs_fileoff_t a, xfs_fileoff_t b);
#define	XFS_FILEOFF_MAX(a,b)	xfs_fileoff_max(a,b)
#else
#define	XFS_FILEOFF_MAX(a,b)	\
	((xfs_fileoff_t)(a) > (xfs_fileoff_t)(b) ? \
	 (xfs_fileoff_t)(a) : (xfs_fileoff_t)(b))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FILBLKS_MIN)
xfs_filblks_t xfs_filblks_min(xfs_filblks_t a, xfs_filblks_t b);
#define	XFS_FILBLKS_MIN(a,b)	xfs_filblks_min(a,b)
#else
#define	XFS_FILBLKS_MIN(a,b)	\
	((xfs_filblks_t)(a) < (xfs_filblks_t)(b) ? \
	 (xfs_filblks_t)(a) : (xfs_filblks_t)(b))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FILBLKS_MAX)
xfs_filblks_t xfs_filblks_max(xfs_filblks_t a, xfs_filblks_t b);
#define	XFS_FILBLKS_MAX(a,b)	xfs_filblks_max(a,b)
#else
#define	XFS_FILBLKS_MAX(a,b)	\
	((xfs_filblks_t)(a) > (xfs_filblks_t)(b) ? \
	 (xfs_filblks_t)(a) : (xfs_filblks_t)(b))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FSB_SANITY_CHECK)
int xfs_fsb_sanity_check(struct xfs_mount *mp, xfs_fsblock_t fsb);
#define	XFS_FSB_SANITY_CHECK(mp,fsb)	xfs_fsb_sanity_check(mp,fsb)
#else
#define	XFS_FSB_SANITY_CHECK(mp,fsb)	\
	(XFS_FSB_TO_AGNO(mp, fsb) < mp->m_sb.sb_agcount && \
	 XFS_FSB_TO_AGBNO(mp, fsb) < mp->m_sb.sb_agblocks)
#endif

/*
 * Macros to set EFSCORRUPTED & return/branch.
 */
#define	XFS_WANT_CORRUPTED_GOTO(x,l)	\
	{ \
		int fs_is_ok = (x); \
		ASSERT(fs_is_ok); \
		if (!fs_is_ok) { \
			error = XFS_ERROR(EFSCORRUPTED); \
			goto l; \
		} \
	}

#define	XFS_WANT_CORRUPTED_RETURN(x)	\
	{ \
		int fs_is_ok = (x); \
		ASSERT(fs_is_ok); \
		if (!fs_is_ok) \
			return XFS_ERROR(EFSCORRUPTED); \
	}

#endif	/* !_FS_XFS_BTREE_H */