[deliverable/linux.git] / fs / xfs / xfs_bmap_btree.h

/*
 * Copyright (c) 2000,2002-2005 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_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;
struct xfs_trans;

/*
 * Bmap root header, on-disk form only.
 */
typedef struct xfs_bmdr_block {
	__be16		bb_level;	/* 0 is a leaf */
	__be16		bb_numrecs;	/* current # of data records */
} xfs_bmdr_block_t;

/*
 * Bmap btree record and extent descriptor.
 *  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.
 */
#define BMBT_EXNTFLAG_BITLEN	1
#define BMBT_STARTOFF_BITLEN	54
#define BMBT_STARTBLOCK_BITLEN	52
#define BMBT_BLOCKCOUNT_BITLEN	21


#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
{
	__be64			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;

typedef struct xfs_bmbt_rec_host {
	__uint64_t		l0, l1;
} xfs_bmbt_rec_host_t;

/*
 * Values and macros for delayed-allocation startblock fields.
 */
#define STARTBLOCKVALBITS	17
#define STARTBLOCKMASKBITS	(15 + XFS_BIG_BLKNOS * 20)
#define DSTARTBLOCKMASKBITS	(15 + 20)
#define STARTBLOCKMASK		\
	(((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
#define DSTARTBLOCKMASK		\
	(((((xfs_dfsbno_t)1) << DSTARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)

#define ISNULLSTARTBLOCK(x)	isnullstartblock(x)
static inline int isnullstartblock(xfs_fsblock_t x)
{
	return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK;
}

#define ISNULLDSTARTBLOCK(x)	isnulldstartblock(x)
static inline int isnulldstartblock(xfs_dfsbno_t x)
{
	return ((x) & DSTARTBLOCKMASK) == DSTARTBLOCKMASK;
}

#define NULLSTARTBLOCK(k)	nullstartblock(k)
static inline xfs_fsblock_t nullstartblock(int k)
{
	ASSERT(k < (1 << STARTBLOCKVALBITS));
	return STARTBLOCKMASK | (k);
}

#define STARTBLOCKVAL(x)	startblockval(x)
static inline xfs_filblks_t startblockval(xfs_fsblock_t x)
{
	return (xfs_filblks_t)((x) & ~STARTBLOCKMASK);
}

/*
 * 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_EXT_INVALID
} xfs_exntst_t;

/*
 * Extent state and extent format macros.
 */
#define XFS_EXTFMT_INODE(x)	\
	(xfs_sb_version_hasextflgbit(&((x)->i_mount->m_sb)) ? \
		XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE)
#define ISUNWRITTEN(x)	((x)->br_state == 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 {
	__be64		br_startoff;	/* starting file offset */
} xfs_bmbt_key_t, xfs_bmdr_key_t;

/* btree pointer type */
typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t;

/* btree block header type */
typedef struct xfs_btree_lblock xfs_bmbt_block_t;

#define XFS_BUF_TO_BMBT_BLOCK(bp)	((xfs_bmbt_block_t *)XFS_BUF_PTR(bp))

#define XFS_BMAP_RBLOCK_DSIZE(lev,cur)	((cur)->bc_private.b.forksize)
#define XFS_BMAP_RBLOCK_ISIZE(lev,cur)	\
	((int)XFS_IFORK_PTR((cur)->bc_private.b.ip, \
		    (cur)->bc_private.b.whichfork)->if_broot_bytes)

#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])))
#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])))

#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])))
#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])))

#define XFS_BMAP_REC_DADDR(bb,i,cur)	(XFS_BTREE_REC_ADDR(xfs_bmbt, bb, i))

#define XFS_BMAP_REC_IADDR(bb,i,cur)	(XFS_BTREE_REC_ADDR(xfs_bmbt, bb, i))

#define XFS_BMAP_KEY_DADDR(bb,i,cur)	\
	(XFS_BTREE_KEY_ADDR(xfs_bmbt, bb, i))

#define XFS_BMAP_KEY_IADDR(bb,i,cur)	\
	(XFS_BTREE_KEY_ADDR(xfs_bmbt, bb, i))

#define XFS_BMAP_PTR_DADDR(bb,i,cur)	\
	(XFS_BTREE_PTR_ADDR(xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS(	\
				be16_to_cpu((bb)->bb_level), cur)))
#define XFS_BMAP_PTR_IADDR(bb,i,cur)	\
	(XFS_BTREE_PTR_ADDR(xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS(	\
				be16_to_cpu((bb)->bb_level), cur)))

/*
 * These are to be used when we know the size of the block and
 * we don't have a cursor.
 */
#define XFS_BMAP_BROOT_REC_ADDR(bb,i,sz) \
	(XFS_BTREE_REC_ADDR(xfs_bmbt,bb,i))
#define XFS_BMAP_BROOT_KEY_ADDR(bb,i,sz) \
	(XFS_BTREE_KEY_ADDR(xfs_bmbt,bb,i))
#define XFS_BMAP_BROOT_PTR_ADDR(bb,i,sz) \
	(XFS_BTREE_PTR_ADDR(xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz)))

#define XFS_BMAP_BROOT_NUMRECS(bb)	be16_to_cpu((bb)->bb_numrecs)
#define XFS_BMAP_BROOT_MAXRECS(sz)	XFS_BTREE_BLOCK_MAXRECS(sz,xfs_bmbt,0)

#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) \
	(int)(sizeof(xfs_bmbt_block_t) + \
	       ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))

#define XFS_BMAP_BROOT_SPACE(bb) \
	(XFS_BMAP_BROOT_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
#define XFS_BMDR_SPACE_CALC(nrecs) \
	(int)(sizeof(xfs_bmdr_block_t) + \
	       ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))

/*
 * Maximum number of bmap btree levels.
 */
#define XFS_BM_MAXLEVELS(mp,w)		((mp)->m_bm_maxlevels[(w)])

#define XFS_BMAP_SANITY_CHECK(mp,bb,level) \
	(be32_to_cpu((bb)->bb_magic) == XFS_BMAP_MAGIC && \
	 be16_to_cpu((bb)->bb_level) == level && \
	 be16_to_cpu((bb)->bb_numrecs) > 0 && \
	 be16_to_cpu((bb)->bb_numrecs) <= (mp)->m_bmap_dmxr[(level) != 0])


#ifdef __KERNEL__

/*
 * Prototypes for xfs_bmap.c to call.
 */
extern void xfs_bmdr_to_bmbt(xfs_bmdr_block_t *, int, xfs_bmbt_block_t *, int);
extern int xfs_bmbt_decrement(struct xfs_btree_cur *, int, int *);
extern int xfs_bmbt_delete(struct xfs_btree_cur *, int *);
extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s);
extern xfs_bmbt_block_t *xfs_bmbt_get_block(struct xfs_btree_cur *cur,
						int, struct xfs_buf **bpp);
extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r);
extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r);
extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r);
extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_host_t *r);

extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s);
extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r);
extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r);

extern int xfs_bmbt_insert(struct xfs_btree_cur *, int *);
extern void xfs_bmbt_log_block(struct xfs_btree_cur *, struct xfs_buf *, int);
extern void xfs_bmbt_log_recs(struct xfs_btree_cur *, struct xfs_buf *, int,
				int);
extern int xfs_bmbt_lookup_eq(struct xfs_btree_cur *, xfs_fileoff_t,
				xfs_fsblock_t, xfs_filblks_t, int *);
extern int xfs_bmbt_lookup_ge(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.
 */
extern int xfs_bmbt_newroot(struct xfs_btree_cur *cur, int *lflags, int *stat);

extern void xfs_bmbt_set_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s);
extern void xfs_bmbt_set_allf(xfs_bmbt_rec_host_t *r, xfs_fileoff_t o,
			xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
extern void xfs_bmbt_set_blockcount(xfs_bmbt_rec_host_t *r, xfs_filblks_t v);
extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v);
extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v);
extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v);

extern void xfs_bmbt_disk_set_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s);
extern 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);

extern void xfs_bmbt_to_bmdr(xfs_bmbt_block_t *, int, xfs_bmdr_block_t *, int);
extern int xfs_bmbt_update(struct xfs_btree_cur *, xfs_fileoff_t,
				xfs_fsblock_t, xfs_filblks_t, xfs_exntst_t);

extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
		struct xfs_trans *, struct xfs_inode *, int);

#endif	/* __KERNEL__ */

#endif	/* __XFS_BMAP_BTREE_H__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18	#ifndef __XFS_BMAP_BTREE_H__
	19	#define __XFS_BMAP_BTREE_H__
	20
	21	#define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */
	22
	23	struct xfs_btree_cur;
	24	struct xfs_btree_lblock;
	25	struct xfs_mount;
	26	struct xfs_inode;
561f7d17	27	struct xfs_trans;
1da177e4 LT	28
	29	/*
	30	* Bmap root header, on-disk form only.
	31	*/
16259e7d CH	32	typedef struct xfs_bmdr_block {
	33	__be16 bb_level; /* 0 is a leaf */
	34	__be16 bb_numrecs; /* current # of data records */
1da177e4 LT	35	} xfs_bmdr_block_t;
	36
	37	/*
	38	* Bmap btree record and extent descriptor.
1da177e4 LT	39	* l0:63 is an extent flag (value 1 indicates non-normal).
	40	* l0:9-62 are startoff.
	41	* l0:0-8 and l1:21-63 are startblock.
	42	* l1:0-20 are blockcount.
	43	*/
1da177e4	44	#define BMBT_EXNTFLAG_BITLEN 1
1da177e4	45	#define BMBT_STARTOFF_BITLEN 54
1da177e4	46	#define BMBT_STARTBLOCK_BITLEN 52
1da177e4 LT	47	#define BMBT_BLOCKCOUNT_BITLEN 21
1da177e4 LT	48
1da177e4 LT	49
	50	#define BMBT_USE_64 1
	51
	52	typedef struct xfs_bmbt_rec_32
	53	{
	54	__uint32_t l0, l1, l2, l3;
	55	} xfs_bmbt_rec_32_t;
	56	typedef struct xfs_bmbt_rec_64
	57	{
cd8b0a97	58	__be64 l0, l1;
1da177e4 LT	59	} xfs_bmbt_rec_64_t;
	60
	61	typedef __uint64_t xfs_bmbt_rec_base_t; /* use this for casts */
	62	typedef xfs_bmbt_rec_64_t xfs_bmbt_rec_t, xfs_bmdr_rec_t;
	63
a6f64d4a CH	64	typedef struct xfs_bmbt_rec_host {
	65	__uint64_t l0, l1;
	66	} xfs_bmbt_rec_host_t;
	67
1da177e4 LT	68	/*
	69	* Values and macros for delayed-allocation startblock fields.
	70	*/
	71	#define STARTBLOCKVALBITS 17
	72	#define STARTBLOCKMASKBITS (15 + XFS_BIG_BLKNOS * 20)
	73	#define DSTARTBLOCKMASKBITS (15 + 20)
	74	#define STARTBLOCKMASK \
	75	(((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
	76	#define DSTARTBLOCKMASK \
	77	(((((xfs_dfsbno_t)1) << DSTARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
a844f451	78
1da177e4	79	#define ISNULLSTARTBLOCK(x) isnullstartblock(x)
a844f451 NS	80	static inline int isnullstartblock(xfs_fsblock_t x)
	81	{
	82	return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK;
	83	}
	84
1da177e4	85	#define ISNULLDSTARTBLOCK(x) isnulldstartblock(x)
a844f451 NS	86	static inline int isnulldstartblock(xfs_dfsbno_t x)
	87	{
	88	return ((x) & DSTARTBLOCKMASK) == DSTARTBLOCKMASK;
	89	}
	90
1da177e4	91	#define NULLSTARTBLOCK(k) nullstartblock(k)
a844f451 NS	92	static inline xfs_fsblock_t nullstartblock(int k)
	93	{
	94	ASSERT(k < (1 << STARTBLOCKVALBITS));
	95	return STARTBLOCKMASK \| (k);
	96	}
	97
1da177e4	98	#define STARTBLOCKVAL(x) startblockval(x)
a844f451 NS	99	static inline xfs_filblks_t startblockval(xfs_fsblock_t x)
	100	{
	101	return (xfs_filblks_t)((x) & ~STARTBLOCKMASK);
	102	}
1da177e4 LT	103
	104	/*
	105	* Possible extent formats.
	106	*/
	107	typedef enum {
	108	XFS_EXTFMT_NOSTATE = 0,
	109	XFS_EXTFMT_HASSTATE
	110	} xfs_exntfmt_t;
	111
	112	/*
	113	* Possible extent states.
	114	*/
	115	typedef enum {
	116	XFS_EXT_NORM, XFS_EXT_UNWRITTEN,
	117	XFS_EXT_DMAPI_OFFLINE, XFS_EXT_INVALID
	118	} xfs_exntst_t;
	119
	120	/*
	121	* Extent state and extent format macros.
	122	*/
a844f451	123	#define XFS_EXTFMT_INODE(x) \
62118709	124	(xfs_sb_version_hasextflgbit(&((x)->i_mount->m_sb)) ? \
a844f451	125	XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE)
1da177e4 LT	126	#define ISUNWRITTEN(x) ((x)->br_state == XFS_EXT_UNWRITTEN)
	127
	128	/*
	129	* Incore version of above.
	130	*/
	131	typedef struct xfs_bmbt_irec
	132	{
	133	xfs_fileoff_t br_startoff; /* starting file offset */
	134	xfs_fsblock_t br_startblock; /* starting block number */
	135	xfs_filblks_t br_blockcount; /* number of blocks */
	136	xfs_exntst_t br_state; /* extent state */
	137	} xfs_bmbt_irec_t;
	138
	139	/*
	140	* Key structure for non-leaf levels of the tree.
	141	*/
8801bb99 CH	142	typedef struct xfs_bmbt_key {
8801bb99 CH	143	__be64 br_startoff; /* starting file offset */
1da177e4 LT	144	} xfs_bmbt_key_t, xfs_bmdr_key_t;
1da177e4 LT	145
397b5208 CH	146	/* btree pointer type */
	147	typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t;
	148
	149	/* btree block header type */
1da177e4 LT	150	typedef struct xfs_btree_lblock xfs_bmbt_block_t;
1da177e4 LT	151
a844f451	152	#define XFS_BUF_TO_BMBT_BLOCK(bp) ((xfs_bmbt_block_t *)XFS_BUF_PTR(bp))
1da177e4	153
a844f451 NS	154	#define XFS_BMAP_RBLOCK_DSIZE(lev,cur) ((cur)->bc_private.b.forksize)
a844f451 NS	155	#define XFS_BMAP_RBLOCK_ISIZE(lev,cur) \
1da177e4	156	((int)XFS_IFORK_PTR((cur)->bc_private.b.ip, \
a844f451	157	(cur)->bc_private.b.whichfork)->if_broot_bytes)
1da177e4	158
1da177e4	159	#define XFS_BMAP_BLOCK_DMAXRECS(lev,cur) \
a844f451	160	(((lev) == (cur)->bc_nlevels - 1 ? \
1da177e4 LT	161	XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur), \
1da177e4 LT	162	xfs_bmdr, (lev) == 0) : \
a844f451	163	((cur)->bc_mp->m_bmap_dmxr[(lev) != 0])))
1da177e4	164	#define XFS_BMAP_BLOCK_IMAXRECS(lev,cur) \
a844f451 NS	165	(((lev) == (cur)->bc_nlevels - 1 ? \
	166	XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur),\
	167	xfs_bmbt, (lev) == 0) : \
	168	((cur)->bc_mp->m_bmap_dmxr[(lev) != 0])))
1da177e4	169
1da177e4	170	#define XFS_BMAP_BLOCK_DMINRECS(lev,cur) \
a844f451 NS	171	(((lev) == (cur)->bc_nlevels - 1 ? \
	172	XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur),\
	173	xfs_bmdr, (lev) == 0) : \
	174	((cur)->bc_mp->m_bmap_dmnr[(lev) != 0])))
1da177e4	175	#define XFS_BMAP_BLOCK_IMINRECS(lev,cur) \
a844f451 NS	176	(((lev) == (cur)->bc_nlevels - 1 ? \
	177	XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur),\
	178	xfs_bmbt, (lev) == 0) : \
	179	((cur)->bc_mp->m_bmap_dmnr[(lev) != 0])))
	180
2c36dded ES	181	#define XFS_BMAP_REC_DADDR(bb,i,cur) (XFS_BTREE_REC_ADDR(xfs_bmbt, bb, i))
	182
	183	#define XFS_BMAP_REC_IADDR(bb,i,cur) (XFS_BTREE_REC_ADDR(xfs_bmbt, bb, i))
a844f451 NS	184
a844f451 NS	185	#define XFS_BMAP_KEY_DADDR(bb,i,cur) \
2c36dded ES	186	(XFS_BTREE_KEY_ADDR(xfs_bmbt, bb, i))
2c36dded ES	187
a844f451	188	#define XFS_BMAP_KEY_IADDR(bb,i,cur) \
2c36dded	189	(XFS_BTREE_KEY_ADDR(xfs_bmbt, bb, i))
a844f451 NS	190
a844f451 NS	191	#define XFS_BMAP_PTR_DADDR(bb,i,cur) \
2c36dded	192	(XFS_BTREE_PTR_ADDR(xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS( \
16259e7d	193	be16_to_cpu((bb)->bb_level), cur)))
a844f451	194	#define XFS_BMAP_PTR_IADDR(bb,i,cur) \
2c36dded	195	(XFS_BTREE_PTR_ADDR(xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS( \
16259e7d	196	be16_to_cpu((bb)->bb_level), cur)))
1da177e4 LT	197
	198	/*
	199	* These are to be used when we know the size of the block and
	200	* we don't have a cursor.
	201	*/
1da177e4	202	#define XFS_BMAP_BROOT_REC_ADDR(bb,i,sz) \
2c36dded	203	(XFS_BTREE_REC_ADDR(xfs_bmbt,bb,i))
1da177e4	204	#define XFS_BMAP_BROOT_KEY_ADDR(bb,i,sz) \
2c36dded	205	(XFS_BTREE_KEY_ADDR(xfs_bmbt,bb,i))
1da177e4	206	#define XFS_BMAP_BROOT_PTR_ADDR(bb,i,sz) \
2c36dded	207	(XFS_BTREE_PTR_ADDR(xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz)))
a844f451	208
16259e7d	209	#define XFS_BMAP_BROOT_NUMRECS(bb) be16_to_cpu((bb)->bb_numrecs)
a844f451	210	#define XFS_BMAP_BROOT_MAXRECS(sz) XFS_BTREE_BLOCK_MAXRECS(sz,xfs_bmbt,0)
1da177e4	211
1da177e4	212	#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) \
a844f451 NS	213	(int)(sizeof(xfs_bmbt_block_t) + \
	214	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
	215
1da177e4	216	#define XFS_BMAP_BROOT_SPACE(bb) \
16259e7d	217	(XFS_BMAP_BROOT_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
a844f451 NS	218	#define XFS_BMDR_SPACE_CALC(nrecs) \
	219	(int)(sizeof(xfs_bmdr_block_t) + \
	220	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
1da177e4 LT	221
	222	/*
	223	* Maximum number of bmap btree levels.
	224	*/
a844f451	225	#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
1da177e4	226
a844f451	227	#define XFS_BMAP_SANITY_CHECK(mp,bb,level) \
16259e7d CH	228	(be32_to_cpu((bb)->bb_magic) == XFS_BMAP_MAGIC && \
	229	be16_to_cpu((bb)->bb_level) == level && \
	230	be16_to_cpu((bb)->bb_numrecs) > 0 && \
	231	be16_to_cpu((bb)->bb_numrecs) <= (mp)->m_bmap_dmxr[(level) != 0])
1da177e4 LT	232
	233
	234	#ifdef __KERNEL__
	235
1da177e4 LT	236	/*
	237	* Prototypes for xfs_bmap.c to call.
	238	*/
a844f451 NS	239	extern void xfs_bmdr_to_bmbt(xfs_bmdr_block_t , int, xfs_bmbt_block_t , int);
	240	extern int xfs_bmbt_decrement(struct xfs_btree_cur , int, int );
	241	extern int xfs_bmbt_delete(struct xfs_btree_cur , int );
a6f64d4a	242	extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t r, xfs_bmbt_irec_t s);
a844f451 NS	243	extern xfs_bmbt_block_t xfs_bmbt_get_block(struct xfs_btree_cur cur,
a844f451 NS	244	int, struct xfs_buf **bpp);
a6f64d4a CH	245	extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r);
	246	extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r);
	247	extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r);
	248	extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_host_t *r);
1da177e4	249
a844f451	250	extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t r, xfs_bmbt_irec_t s);
a844f451	251	extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r);
a844f451	252	extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r);
1da177e4	253
a844f451 NS	254	extern int xfs_bmbt_insert(struct xfs_btree_cur , int );
	255	extern void xfs_bmbt_log_block(struct xfs_btree_cur , struct xfs_buf , int);
	256	extern void xfs_bmbt_log_recs(struct xfs_btree_cur , struct xfs_buf , int,
	257	int);
	258	extern int xfs_bmbt_lookup_eq(struct xfs_btree_cur *, xfs_fileoff_t,
	259	xfs_fsblock_t, xfs_filblks_t, int *);
	260	extern int xfs_bmbt_lookup_ge(struct xfs_btree_cur *, xfs_fileoff_t,
	261	xfs_fsblock_t, xfs_filblks_t, int *);
1da177e4	262
1da177e4 LT	263	/*
	264	* Give the bmap btree a new root block. Copy the old broot contents
	265	* down into a real block and make the broot point to it.
	266	*/
a844f451 NS	267	extern int xfs_bmbt_newroot(struct xfs_btree_cur cur, int lflags, int *stat);
a844f451 NS	268
a6f64d4a CH	269	extern void xfs_bmbt_set_all(xfs_bmbt_rec_host_t r, xfs_bmbt_irec_t s);
a6f64d4a CH	270	extern void xfs_bmbt_set_allf(xfs_bmbt_rec_host_t *r, xfs_fileoff_t o,
a844f451	271	xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
a6f64d4a CH	272	extern void xfs_bmbt_set_blockcount(xfs_bmbt_rec_host_t *r, xfs_filblks_t v);
	273	extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v);
	274	extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v);
	275	extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v);
1da177e4	276
a844f451 NS	277	extern void xfs_bmbt_disk_set_all(xfs_bmbt_rec_t r, xfs_bmbt_irec_t s);
	278	extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o,
	279	xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
1da177e4	280
a844f451 NS	281	extern void xfs_bmbt_to_bmdr(xfs_bmbt_block_t , int, xfs_bmdr_block_t , int);
	282	extern int xfs_bmbt_update(struct xfs_btree_cur *, xfs_fileoff_t,
	283	xfs_fsblock_t, xfs_filblks_t, xfs_exntst_t);
1da177e4	284
561f7d17 CH	285	extern struct xfs_btree_cur xfs_bmbt_init_cursor(struct xfs_mount ,
	286	struct xfs_trans , struct xfs_inode , int);
	287
1da177e4 LT	288	#endif /* __KERNEL__ */
	289
	290	#endif /* __XFS_BMAP_BTREE_H__ */