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Switch xfs from using a big endian internal representation for
the in memory copy of extents to a host byte order representation.
The internal extents are read in once, then modified seperately
from the on disk ones. Since we search and manipulate the extents
multiple times, it is cheaper to convert them to host byte order
once and then keep them in that format. Worth about 5 to 10%
reduction in cpu time for some loads. Complicated by the fact
that the in memory extents are written out to the log sometimes,
and when expanding extents are used to write out the initial
block of extents.
prototypes for disk format extent functions

/*
 * Copyright (c) 2000 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_BMAP_BTREE_H__
#define __XFS_BMAP_BTREE_H__

#define XFS_BMAP_MAGIC	0x424d4150	/* 'BMAP' */

struct xfs_btree_cur;
struct xfs_btree_lblock;
struct xfs_mount;
struct xfs_inode;

/*
 * Bmap root header, on-disk form only.
 */
typedef struct xfs_bmdr_block
{
	__uint16_t	bb_level;	/* 0 is a leaf */
	__uint16_t	bb_numrecs;	/* current # of data records */
} xfs_bmdr_block_t;

/*
 * Bmap btree record and extent descriptor.
 * For 32-bit kernels,
 *  l0:31 is an extent flag (value 1 indicates non-normal).
 *  l0:0-30 and l1:9-31 are startoff.
 *  l1:0-8, l2:0-31, and l3:21-31 are startblock.
 *  l3:0-20 are blockcount.
 * For 64-bit kernels,
 *  l0:63 is an extent flag (value 1 indicates non-normal).
 *  l0:9-62 are startoff.
 *  l0:0-8 and l1:21-63 are startblock.
 *  l1:0-20 are blockcount.
 */

#if __BYTE_ORDER == __LITTLE_ENDIAN

#define BMBT_TOTAL_BITLEN	128	/* 128 bits, 16 bytes */
#define BMBT_EXNTFLAG_BITOFF	0
#define BMBT_EXNTFLAG_BITLEN	1
#define BMBT_STARTOFF_BITOFF	(BMBT_EXNTFLAG_BITOFF + BMBT_EXNTFLAG_BITLEN)
#define BMBT_STARTOFF_BITLEN	54
#define BMBT_STARTBLOCK_BITOFF	(BMBT_STARTOFF_BITOFF + BMBT_STARTOFF_BITLEN)
#define BMBT_STARTBLOCK_BITLEN	52
#define BMBT_BLOCKCOUNT_BITOFF	\
	(BMBT_STARTBLOCK_BITOFF + BMBT_STARTBLOCK_BITLEN)
#define BMBT_BLOCKCOUNT_BITLEN	(BMBT_TOTAL_BITLEN - BMBT_BLOCKCOUNT_BITOFF)

#else

#define BMBT_TOTAL_BITLEN	128	/* 128 bits, 16 bytes */
#define BMBT_EXNTFLAG_BITOFF	63
#define BMBT_EXNTFLAG_BITLEN	1
#define BMBT_STARTOFF_BITOFF	(BMBT_EXNTFLAG_BITOFF - BMBT_STARTOFF_BITLEN)
#define BMBT_STARTOFF_BITLEN	54
#define BMBT_STARTBLOCK_BITOFF	85 /* 128 - 43 (other 9 is in first word) */
#define BMBT_STARTBLOCK_BITLEN	52
#define BMBT_BLOCKCOUNT_BITOFF	64 /* Start of second 64 bit container */
#define BMBT_BLOCKCOUNT_BITLEN	21

#endif


#define BMBT_USE_64	1

typedef struct xfs_bmbt_rec_32
{
	__uint32_t		l0, l1, l2, l3;
} xfs_bmbt_rec_32_t;
typedef struct xfs_bmbt_rec_64
{
	__uint64_t		l0, l1;
} xfs_bmbt_rec_64_t;

typedef __uint64_t	xfs_bmbt_rec_base_t;	/* use this for casts */
typedef xfs_bmbt_rec_64_t xfs_bmbt_rec_t, xfs_bmdr_rec_t;

/*
 * Values and macros for delayed-allocation startblock fields.
 */
#define STARTBLOCKVALBITS	17
#define STARTBLOCKMASKBITS	(15 + XFS_BIG_FILESYSTEMS * 20)
#define DSTARTBLOCKMASKBITS	(15 + 20)
#define STARTBLOCKMASK		\
	(((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
#define DSTARTBLOCKMASK		\
	(((((xfs_dfsbno_t)1) << DSTARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_ISNULLSTARTBLOCK)
int isnullstartblock(xfs_fsblock_t x);
#define ISNULLSTARTBLOCK(x)	isnullstartblock(x)
#else
#define ISNULLSTARTBLOCK(x)	(((x) & STARTBLOCKMASK) == STARTBLOCKMASK)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_ISNULLDSTARTBLOCK)
int isnulldstartblock(xfs_dfsbno_t x);
#define ISNULLDSTARTBLOCK(x)	isnulldstartblock(x)
#else
#define ISNULLDSTARTBLOCK(x)	(((x) & DSTARTBLOCKMASK) == DSTARTBLOCKMASK)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_NULLSTARTBLOCK)
xfs_fsblock_t nullstartblock(int k);
#define NULLSTARTBLOCK(k)	nullstartblock(k)
#else
#define NULLSTARTBLOCK(k)	\
	((ASSERT(k < (1 << STARTBLOCKVALBITS))), (STARTBLOCKMASK | (k)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_STARTBLOCKVAL)
xfs_filblks_t startblockval(xfs_fsblock_t x);
#define STARTBLOCKVAL(x)	startblockval(x)
#else
#define STARTBLOCKVAL(x)	((xfs_filblks_t)((x) & ~STARTBLOCKMASK))
#endif

/*
 * Possible extent formats.
 */
typedef enum {
	XFS_EXTFMT_NOSTATE = 0,
	XFS_EXTFMT_HASSTATE
} xfs_exntfmt_t;

/*
 * Possible extent states.
 */
typedef enum {
	XFS_EXT_NORM, XFS_EXT_UNWRITTEN,
	XFS_EXT_DMAPI_OFFLINE
} xfs_exntst_t;

/*
 * Extent state and extent format macros.
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_EXTFMT_INODE )
xfs_exntfmt_t xfs_extfmt_inode(struct xfs_inode *ip);
#define XFS_EXTFMT_INODE(x)	xfs_extfmt_inode(x)
#else
#define XFS_EXTFMT_INODE(x) \
  (XFS_SB_VERSION_HASEXTFLGBIT(&((x)->i_mount->m_sb)) ? \
	XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE)
#endif
#define ISUNWRITTEN(x)		((x) == XFS_EXT_UNWRITTEN)

/*
 * Incore version of above.
 */
typedef struct xfs_bmbt_irec
{
	xfs_fileoff_t	br_startoff;	/* starting file offset */
	xfs_fsblock_t	br_startblock;	/* starting block number */
	xfs_filblks_t	br_blockcount;	/* number of blocks */
	xfs_exntst_t	br_state;	/* extent state */
} xfs_bmbt_irec_t;

/*
 * Key structure for non-leaf levels of the tree.
 */
typedef struct xfs_bmbt_key
{
	xfs_dfiloff_t	br_startoff;	/* starting file offset */
} xfs_bmbt_key_t, xfs_bmdr_key_t;

typedef xfs_dfsbno_t xfs_bmbt_ptr_t, xfs_bmdr_ptr_t;	/* btree pointer type */
					/* btree block header type */
typedef struct xfs_btree_lblock xfs_bmbt_block_t;

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_BMBT_BLOCK)
xfs_bmbt_block_t *xfs_buf_to_bmbt_block(struct xfs_buf *bp);
#define XFS_BUF_TO_BMBT_BLOCK(bp)		xfs_buf_to_bmbt_block(bp)
#else
#define XFS_BUF_TO_BMBT_BLOCK(bp) ((xfs_bmbt_block_t *)(XFS_BUF_PTR(bp)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_RBLOCK_DSIZE)
int xfs_bmap_rblock_dsize(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_RBLOCK_DSIZE(lev,cur)		xfs_bmap_rblock_dsize(lev,cur)
#else
#define XFS_BMAP_RBLOCK_DSIZE(lev,cur) ((cur)->bc_private.b.forksize)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_RBLOCK_ISIZE)
int xfs_bmap_rblock_isize(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_RBLOCK_ISIZE(lev,cur)		xfs_bmap_rblock_isize(lev,cur)
#else
#define XFS_BMAP_RBLOCK_ISIZE(lev,cur) \
	((int)XFS_IFORK_PTR((cur)->bc_private.b.ip, \
			    (cur)->bc_private.b.whichfork)->if_broot_bytes)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_IBLOCK_SIZE)
int xfs_bmap_iblock_size(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_IBLOCK_SIZE(lev,cur)		xfs_bmap_iblock_size(lev,cur)
#else
#define XFS_BMAP_IBLOCK_SIZE(lev,cur) (1 << (cur)->bc_blocklog)
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_DSIZE)
int xfs_bmap_block_dsize(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_DSIZE(lev,cur)		xfs_bmap_block_dsize(lev,cur)
#else
#define XFS_BMAP_BLOCK_DSIZE(lev,cur) \
	((lev) == (cur)->bc_nlevels - 1 ? \
		XFS_BMAP_RBLOCK_DSIZE(lev,cur) : \
		XFS_BMAP_IBLOCK_SIZE(lev,cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_ISIZE)
int xfs_bmap_block_isize(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_ISIZE(lev,cur)		xfs_bmap_block_isize(lev,cur)
#else
#define XFS_BMAP_BLOCK_ISIZE(lev,cur) \
	((lev) == (cur)->bc_nlevels - 1 ? \
		XFS_BMAP_RBLOCK_ISIZE(lev,cur) : \
		XFS_BMAP_IBLOCK_SIZE(lev,cur))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_DMAXRECS)
int xfs_bmap_block_dmaxrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_DMAXRECS(lev,cur)	xfs_bmap_block_dmaxrecs(lev,cur)
#else
#define XFS_BMAP_BLOCK_DMAXRECS(lev,cur) \
	((lev) == (cur)->bc_nlevels - 1 ? \
		XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur), \
			xfs_bmdr, (lev) == 0) : \
		((cur)->bc_mp->m_bmap_dmxr[(lev) != 0]))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_IMAXRECS)
int xfs_bmap_block_imaxrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_IMAXRECS(lev,cur)	xfs_bmap_block_imaxrecs(lev,cur)
#else
#define XFS_BMAP_BLOCK_IMAXRECS(lev,cur) \
	((lev) == (cur)->bc_nlevels - 1 ? \
		XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur), \
			xfs_bmbt, (lev) == 0) : \
		((cur)->bc_mp->m_bmap_dmxr[(lev) != 0]))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_DMINRECS)
int xfs_bmap_block_dminrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_DMINRECS(lev,cur)	xfs_bmap_block_dminrecs(lev,cur)
#else
#define XFS_BMAP_BLOCK_DMINRECS(lev,cur) \
	((lev) == (cur)->bc_nlevels - 1 ? \
		XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur), \
			xfs_bmdr, (lev) == 0) : \
		((cur)->bc_mp->m_bmap_dmnr[(lev) != 0]))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_IMINRECS)
int xfs_bmap_block_iminrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_IMINRECS(lev,cur)	xfs_bmap_block_iminrecs(lev,cur)
#else
#define XFS_BMAP_BLOCK_IMINRECS(lev,cur) \
	((lev) == (cur)->bc_nlevels - 1 ? \
		XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur), \
			xfs_bmbt, (lev) == 0) : \
		((cur)->bc_mp->m_bmap_dmnr[(lev) != 0]))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_REC_DADDR)
xfs_bmbt_rec_t *
xfs_bmap_rec_daddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_REC_DADDR(bb,i,cur)		xfs_bmap_rec_daddr(bb,i,cur)
#else
#define XFS_BMAP_REC_DADDR(bb,i,cur) \
	XFS_BTREE_REC_ADDR(XFS_BMAP_BLOCK_DSIZE(		\
		INT_GET((bb)->bb_level, ARCH_CONVERT), cur),	\
		xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS(	\
			INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_REC_IADDR)
xfs_bmbt_rec_t *
xfs_bmap_rec_iaddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_REC_IADDR(bb,i,cur)		xfs_bmap_rec_iaddr(bb,i,cur)
#else
#define XFS_BMAP_REC_IADDR(bb,i,cur) \
	XFS_BTREE_REC_ADDR(XFS_BMAP_BLOCK_ISIZE(		\
		INT_GET((bb)->bb_level, ARCH_CONVERT), cur),	\
		xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS(	\
			INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_KEY_DADDR)
xfs_bmbt_key_t *
xfs_bmap_key_daddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_KEY_DADDR(bb,i,cur)		xfs_bmap_key_daddr(bb,i,cur)
#else
#define XFS_BMAP_KEY_DADDR(bb,i,cur) \
	XFS_BTREE_KEY_ADDR(XFS_BMAP_BLOCK_DSIZE(		\
		INT_GET((bb)->bb_level, ARCH_CONVERT), cur),	\
		xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS(	\
			INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_KEY_IADDR)
xfs_bmbt_key_t *
xfs_bmap_key_iaddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_KEY_IADDR(bb,i,cur)		xfs_bmap_key_iaddr(bb,i,cur)
#else
#define XFS_BMAP_KEY_IADDR(bb,i,cur) \
	XFS_BTREE_KEY_ADDR(XFS_BMAP_BLOCK_ISIZE(		\
		INT_GET((bb)->bb_level, ARCH_CONVERT), cur),	\
		xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS(	\
			INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_PTR_DADDR)
xfs_bmbt_ptr_t *
xfs_bmap_ptr_daddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_PTR_DADDR(bb,i,cur)		xfs_bmap_ptr_daddr(bb,i,cur)
#else
#define XFS_BMAP_PTR_DADDR(bb,i,cur) \
	XFS_BTREE_PTR_ADDR(XFS_BMAP_BLOCK_DSIZE(		\
		INT_GET((bb)->bb_level, ARCH_CONVERT), cur),	\
		xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS(	\
			INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_PTR_IADDR)
xfs_bmbt_ptr_t *
xfs_bmap_ptr_iaddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_PTR_IADDR(bb,i,cur)		xfs_bmap_ptr_iaddr(bb,i,cur)
#else
#define XFS_BMAP_PTR_IADDR(bb,i,cur) \
	XFS_BTREE_PTR_ADDR(XFS_BMAP_BLOCK_ISIZE(		\
		INT_GET((bb)->bb_level, ARCH_CONVERT), cur),	\
		xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS(	\
			INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif

/*
 * These are to be used when we know the size of the block and
 * we don't have a cursor.
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_REC_ADDR)
xfs_bmbt_rec_t *xfs_bmap_broot_rec_addr(xfs_bmbt_block_t *bb, int i, int sz);
#define XFS_BMAP_BROOT_REC_ADDR(bb,i,sz)	xfs_bmap_broot_rec_addr(bb,i,sz)
#else
#define XFS_BMAP_BROOT_REC_ADDR(bb,i,sz) \
	XFS_BTREE_REC_ADDR(sz,xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_KEY_ADDR)
xfs_bmbt_key_t *xfs_bmap_broot_key_addr(xfs_bmbt_block_t *bb, int i, int sz);
#define XFS_BMAP_BROOT_KEY_ADDR(bb,i,sz)	xfs_bmap_broot_key_addr(bb,i,sz)
#else
#define XFS_BMAP_BROOT_KEY_ADDR(bb,i,sz) \
	XFS_BTREE_KEY_ADDR(sz,xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_PTR_ADDR)
xfs_bmbt_ptr_t *xfs_bmap_broot_ptr_addr(xfs_bmbt_block_t *bb, int i, int sz);
#define XFS_BMAP_BROOT_PTR_ADDR(bb,i,sz)	xfs_bmap_broot_ptr_addr(bb,i,sz)
#else
#define XFS_BMAP_BROOT_PTR_ADDR(bb,i,sz) \
	XFS_BTREE_PTR_ADDR(sz,xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_NUMRECS)
int xfs_bmap_broot_numrecs(xfs_bmdr_block_t *bb);
#define XFS_BMAP_BROOT_NUMRECS(bb)		xfs_bmap_broot_numrecs(bb)
#else
#define XFS_BMAP_BROOT_NUMRECS(bb) (INT_GET((bb)->bb_numrecs, ARCH_CONVERT))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_MAXRECS)
int xfs_bmap_broot_maxrecs(int sz);
#define XFS_BMAP_BROOT_MAXRECS(sz)		xfs_bmap_broot_maxrecs(sz)
#else
#define XFS_BMAP_BROOT_MAXRECS(sz) XFS_BTREE_BLOCK_MAXRECS(sz,xfs_bmbt,0)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_SPACE_CALC)
int xfs_bmap_broot_space_calc(int nrecs);
#define XFS_BMAP_BROOT_SPACE_CALC(nrecs)	xfs_bmap_broot_space_calc(nrecs)
#else
#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) \
	((int)(sizeof(xfs_bmbt_block_t) + \
	       ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_SPACE)
int xfs_bmap_broot_space(xfs_bmdr_block_t *bb);
#define XFS_BMAP_BROOT_SPACE(bb)		xfs_bmap_broot_space(bb)
#else
#define XFS_BMAP_BROOT_SPACE(bb) \
	XFS_BMAP_BROOT_SPACE_CALC(INT_GET((bb)->bb_numrecs, ARCH_CONVERT))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMDR_SPACE_CALC)
int xfs_bmdr_space_calc(int nrecs);
#define XFS_BMDR_SPACE_CALC(nrecs)		xfs_bmdr_space_calc(nrecs)
#else
#define XFS_BMDR_SPACE_CALC(nrecs)	\
	((int)(sizeof(xfs_bmdr_block_t) + \
	       ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))))
#endif

/*
 * Maximum number of bmap btree levels.
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BM_MAXLEVELS)
int xfs_bm_maxlevels(struct xfs_mount *mp, int w);
#define XFS_BM_MAXLEVELS(mp,w)			xfs_bm_maxlevels(mp,w)
#else
#define XFS_BM_MAXLEVELS(mp,w)		((mp)->m_bm_maxlevels[w])
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_SANITY_CHECK)
int xfs_bmap_sanity_check(struct xfs_mount *mp, xfs_bmbt_block_t *bb,
	int level);
#define XFS_BMAP_SANITY_CHECK(mp,bb,level)	\
	xfs_bmap_sanity_check(mp,bb,level)
#else
#define XFS_BMAP_SANITY_CHECK(mp,bb,level)	\
	(INT_GET((bb)->bb_magic, ARCH_CONVERT) == XFS_BMAP_MAGIC && \
	 INT_GET((bb)->bb_level, ARCH_CONVERT) == level && \
	 INT_GET((bb)->bb_numrecs, ARCH_CONVERT) > 0 && \
	 INT_GET((bb)->bb_numrecs, ARCH_CONVERT) <= (mp)->m_bmap_dmxr[(level) != 0])
#endif

/*
 * Trace buffer entry types.
 */
#define XFS_BMBT_KTRACE_ARGBI	1
#define XFS_BMBT_KTRACE_ARGBII	2
#define XFS_BMBT_KTRACE_ARGFFFI 3
#define XFS_BMBT_KTRACE_ARGI	4
#define XFS_BMBT_KTRACE_ARGIFK	5
#define XFS_BMBT_KTRACE_ARGIFR	6
#define XFS_BMBT_KTRACE_ARGIK	7
#define XFS_BMBT_KTRACE_CUR	8

#define XFS_BMBT_TRACE_SIZE	4096	/* size of global trace buffer */
#define XFS_BMBT_KTRACE_SIZE	32	/* size of per-inode trace buffer */

#if defined(XFS_ALL_TRACE)
#define XFS_BMBT_TRACE
#endif

#if !defined(DEBUG)
#undef XFS_BMBT_TRACE
#endif


/*
 * Prototypes for xfs_bmap.c to call.
 */

void
xfs_bmdr_to_bmbt(
	xfs_bmdr_block_t *,
	int,
	xfs_bmbt_block_t *,
	int);

int
xfs_bmbt_decrement(
	struct xfs_btree_cur *,
	int,
	int *);

int
xfs_bmbt_delete(
	struct xfs_btree_cur *,
	int,
	int *);

void
xfs_bmbt_get_all(
	xfs_bmbt_rec_t	*r,
	xfs_bmbt_irec_t *s);

xfs_bmbt_block_t *
xfs_bmbt_get_block(
	struct xfs_btree_cur	*cur,
	int			level,
	struct xfs_buf		**bpp);

xfs_filblks_t
xfs_bmbt_get_blockcount(
	xfs_bmbt_rec_t	*r);

xfs_fsblock_t
xfs_bmbt_get_startblock(
	xfs_bmbt_rec_t	*r);

xfs_fileoff_t
xfs_bmbt_get_startoff(
	xfs_bmbt_rec_t	*r);

xfs_exntst_t
xfs_bmbt_get_state(
	xfs_bmbt_rec_t	*r);

#if ARCH_CONVERT != ARCH_NOCONVERT
void
xfs_bmbt_disk_get_all(
	xfs_bmbt_rec_t	*r,
	xfs_bmbt_irec_t *s);

xfs_exntst_t
xfs_bmbt_disk_get_state(
	xfs_bmbt_rec_t	*r);

xfs_filblks_t
xfs_bmbt_disk_get_blockcount(
	xfs_bmbt_rec_t	*r);

xfs_fsblock_t
xfs_bmbt_disk_get_startblock(
	xfs_bmbt_rec_t	*r);

xfs_fileoff_t
xfs_bmbt_disk_get_startoff(
	xfs_bmbt_rec_t	*r);

#else
#define xfs_bmbt_disk_get_all(r, s) \
	xfs_bmbt_get_all(r, s)
#define xfs_bmbt_disk_get_state(r) \
	xfs_bmbt_get_state(r)
#define xfs_bmbt_disk_get_blockcount(r) \
	xfs_bmbt_get_blockcount(r)
#define xfs_bmbt_disk_get_startblock(r) \
	xfs_bmbt_get_blockcount(r)
#define xfs_bmbt_disk_get_startoff(r) \
	xfs_bmbt_get_startoff(r)
#endif

int
xfs_bmbt_increment(
	struct xfs_btree_cur *,
	int,
	int *);

int
xfs_bmbt_insert(
	struct xfs_btree_cur *,
	int *);

int
xfs_bmbt_insert_many(
	struct xfs_btree_cur *,
	int,
	xfs_bmbt_rec_t *,
	int *);

void
xfs_bmbt_log_block(
	struct xfs_btree_cur *,
	struct xfs_buf *,
	int);

void
xfs_bmbt_log_recs(
	struct xfs_btree_cur *,
	struct xfs_buf *,
	int,
	int);

int
xfs_bmbt_lookup_eq(
	struct xfs_btree_cur *,
	xfs_fileoff_t,
	xfs_fsblock_t,
	xfs_filblks_t,
	int *);

int
xfs_bmbt_lookup_ge(
	struct xfs_btree_cur *,
	xfs_fileoff_t,
	xfs_fsblock_t,
	xfs_filblks_t,
	int *);

int
xfs_bmbt_lookup_le(
	struct xfs_btree_cur *,
	xfs_fileoff_t,
	xfs_fsblock_t,
	xfs_filblks_t,
	int *);

/*
 * Give the bmap btree a new root block.  Copy the old broot contents
 * down into a real block and make the broot point to it.
 */
int						/* error */
xfs_bmbt_newroot(
	struct xfs_btree_cur	*cur,		/* btree cursor */
	int			*logflags,	/* logging flags for inode */
	int			*stat);		/* return status - 0 fail */

void
xfs_bmbt_set_all(
	xfs_bmbt_rec_t	*r,
	xfs_bmbt_irec_t *s);

void
xfs_bmbt_set_allf(
	xfs_bmbt_rec_t	*r,
	xfs_fileoff_t	o,
	xfs_fsblock_t	b,
	xfs_filblks_t	c,
	xfs_exntst_t	v);

void
xfs_bmbt_set_blockcount(
	xfs_bmbt_rec_t	*r,
	xfs_filblks_t	v);

void
xfs_bmbt_set_startblock(
	xfs_bmbt_rec_t	*r,
	xfs_fsblock_t	v);

void
xfs_bmbt_set_startoff(
	xfs_bmbt_rec_t	*r,
	xfs_fileoff_t	v);

void
xfs_bmbt_set_state(
	xfs_bmbt_rec_t	*r,
	xfs_exntst_t	v);

#if ARCH_CONVERT != ARCH_NOCONVERT
void
xfs_bmbt_disk_set_all(
	xfs_bmbt_rec_t	*r,
	xfs_bmbt_irec_t *s);

void
xfs_bmbt_disk_set_allf(
	xfs_bmbt_rec_t	*r,
	xfs_fileoff_t	o,
	xfs_fsblock_t	b,
	xfs_filblks_t	c,
	xfs_exntst_t	v);
#else
#define xfs_bmbt_disk_set_all(r, s) \
	xfs_bmbt_set_all(r, s)
#define xfs_bmbt_disk_set_allf(r, 0, b, c, v) \
	xfs_bmbt_set_allf(r, 0, b, c, v)
#endif

void
xfs_bmbt_to_bmdr(
	xfs_bmbt_block_t *,
	int,
	xfs_bmdr_block_t *,
	int);

int
xfs_bmbt_update(
	struct xfs_btree_cur *,
	xfs_fileoff_t,
	xfs_fsblock_t,
	xfs_filblks_t,
	xfs_exntst_t);

#ifdef XFSDEBUG
/*
 * Get the data from the pointed-to record.
 */
int
xfs_bmbt_get_rec(
	struct xfs_btree_cur *,
	xfs_fileoff_t *,
	xfs_fsblock_t *,
	xfs_filblks_t *,
	xfs_exntst_t *,
	int *);
#endif


/*
 * Search an extent list for the extent which includes block
 * bno.
 */
xfs_bmbt_rec_t *
xfs_bmap_do_search_extents(
	xfs_bmbt_rec_t *,
	xfs_extnum_t,
	xfs_extnum_t,
	xfs_fileoff_t,
	int *,
	xfs_extnum_t *,
	xfs_bmbt_irec_t *,
	xfs_bmbt_irec_t *);


#endif	/* __XFS_BMAP_BTREE_H__ */