[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;

/*
 * 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__

#if defined(XFS_BMBT_TRACE)
/*
 * 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 */
extern ktrace_t	*xfs_bmbt_trace_buf;
#endif

/*
 * 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_increment(struct xfs_btree_cur *, int, int *);
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);

#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;
	27
	28	/*
	29	* Bmap root header, on-disk form only.
	30	*/
16259e7d CH	31	typedef struct xfs_bmdr_block {
	32	__be16 bb_level; /* 0 is a leaf */
	33	__be16 bb_numrecs; /* current # of data records */
1da177e4 LT	34	} xfs_bmdr_block_t;
	35
	36	/*
	37	* Bmap btree record and extent descriptor.
1da177e4 LT	38	* l0:63 is an extent flag (value 1 indicates non-normal).
	39	* l0:9-62 are startoff.
	40	* l0:0-8 and l1:21-63 are startblock.
	41	* l1:0-20 are blockcount.
	42	*/
1da177e4	43	#define BMBT_EXNTFLAG_BITLEN 1
1da177e4	44	#define BMBT_STARTOFF_BITLEN 54
1da177e4	45	#define BMBT_STARTBLOCK_BITLEN 52
1da177e4 LT	46	#define BMBT_BLOCKCOUNT_BITLEN 21
1da177e4 LT	47
1da177e4 LT	48
	49	#define BMBT_USE_64 1
	50
	51	typedef struct xfs_bmbt_rec_32
	52	{
	53	__uint32_t l0, l1, l2, l3;
	54	} xfs_bmbt_rec_32_t;
	55	typedef struct xfs_bmbt_rec_64
	56	{
cd8b0a97	57	__be64 l0, l1;
1da177e4 LT	58	} xfs_bmbt_rec_64_t;
	59
	60	typedef __uint64_t xfs_bmbt_rec_base_t; /* use this for casts */
	61	typedef xfs_bmbt_rec_64_t xfs_bmbt_rec_t, xfs_bmdr_rec_t;
	62
a6f64d4a CH	63	typedef struct xfs_bmbt_rec_host {
	64	__uint64_t l0, l1;
	65	} xfs_bmbt_rec_host_t;
	66
1da177e4 LT	67	/*
	68	* Values and macros for delayed-allocation startblock fields.
	69	*/
	70	#define STARTBLOCKVALBITS 17
	71	#define STARTBLOCKMASKBITS (15 + XFS_BIG_BLKNOS * 20)
	72	#define DSTARTBLOCKMASKBITS (15 + 20)
	73	#define STARTBLOCKMASK \
	74	(((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
	75	#define DSTARTBLOCKMASK \
	76	(((((xfs_dfsbno_t)1) << DSTARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
a844f451	77
1da177e4	78	#define ISNULLSTARTBLOCK(x) isnullstartblock(x)
a844f451 NS	79	static inline int isnullstartblock(xfs_fsblock_t x)
	80	{
	81	return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK;
	82	}
	83
1da177e4	84	#define ISNULLDSTARTBLOCK(x) isnulldstartblock(x)
a844f451 NS	85	static inline int isnulldstartblock(xfs_dfsbno_t x)
	86	{
	87	return ((x) & DSTARTBLOCKMASK) == DSTARTBLOCKMASK;
	88	}
	89
1da177e4	90	#define NULLSTARTBLOCK(k) nullstartblock(k)
a844f451 NS	91	static inline xfs_fsblock_t nullstartblock(int k)
	92	{
	93	ASSERT(k < (1 << STARTBLOCKVALBITS));
	94	return STARTBLOCKMASK \| (k);
	95	}
	96
1da177e4	97	#define STARTBLOCKVAL(x) startblockval(x)
a844f451 NS	98	static inline xfs_filblks_t startblockval(xfs_fsblock_t x)
	99	{
	100	return (xfs_filblks_t)((x) & ~STARTBLOCKMASK);
	101	}
1da177e4 LT	102
	103	/*
	104	* Possible extent formats.
	105	*/
	106	typedef enum {
	107	XFS_EXTFMT_NOSTATE = 0,
	108	XFS_EXTFMT_HASSTATE
	109	} xfs_exntfmt_t;
	110
	111	/*
	112	* Possible extent states.
	113	*/
	114	typedef enum {
	115	XFS_EXT_NORM, XFS_EXT_UNWRITTEN,
	116	XFS_EXT_DMAPI_OFFLINE, XFS_EXT_INVALID
	117	} xfs_exntst_t;
	118
	119	/*
	120	* Extent state and extent format macros.
	121	*/
a844f451	122	#define XFS_EXTFMT_INODE(x) \
62118709	123	(xfs_sb_version_hasextflgbit(&((x)->i_mount->m_sb)) ? \
a844f451	124	XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE)
1da177e4 LT	125	#define ISUNWRITTEN(x) ((x)->br_state == XFS_EXT_UNWRITTEN)
	126
	127	/*
	128	* Incore version of above.
	129	*/
	130	typedef struct xfs_bmbt_irec
	131	{
	132	xfs_fileoff_t br_startoff; /* starting file offset */
	133	xfs_fsblock_t br_startblock; /* starting block number */
	134	xfs_filblks_t br_blockcount; /* number of blocks */
	135	xfs_exntst_t br_state; /* extent state */
	136	} xfs_bmbt_irec_t;
	137
	138	/*
	139	* Key structure for non-leaf levels of the tree.
	140	*/
8801bb99 CH	141	typedef struct xfs_bmbt_key {
8801bb99 CH	142	__be64 br_startoff; /* starting file offset */
1da177e4 LT	143	} xfs_bmbt_key_t, xfs_bmdr_key_t;
1da177e4 LT	144
397b5208 CH	145	/* btree pointer type */
	146	typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t;
	147
	148	/* btree block header type */
1da177e4 LT	149	typedef struct xfs_btree_lblock xfs_bmbt_block_t;
1da177e4 LT	150
a844f451	151	#define XFS_BUF_TO_BMBT_BLOCK(bp) ((xfs_bmbt_block_t *)XFS_BUF_PTR(bp))
1da177e4	152
a844f451 NS	153	#define XFS_BMAP_RBLOCK_DSIZE(lev,cur) ((cur)->bc_private.b.forksize)
a844f451 NS	154	#define XFS_BMAP_RBLOCK_ISIZE(lev,cur) \
1da177e4	155	((int)XFS_IFORK_PTR((cur)->bc_private.b.ip, \
a844f451	156	(cur)->bc_private.b.whichfork)->if_broot_bytes)
1da177e4	157
1da177e4	158	#define XFS_BMAP_BLOCK_DMAXRECS(lev,cur) \
a844f451	159	(((lev) == (cur)->bc_nlevels - 1 ? \
1da177e4 LT	160	XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur), \
1da177e4 LT	161	xfs_bmdr, (lev) == 0) : \
a844f451	162	((cur)->bc_mp->m_bmap_dmxr[(lev) != 0])))
1da177e4	163	#define XFS_BMAP_BLOCK_IMAXRECS(lev,cur) \
a844f451 NS	164	(((lev) == (cur)->bc_nlevels - 1 ? \
	165	XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur),\
	166	xfs_bmbt, (lev) == 0) : \
	167	((cur)->bc_mp->m_bmap_dmxr[(lev) != 0])))
1da177e4	168
1da177e4	169	#define XFS_BMAP_BLOCK_DMINRECS(lev,cur) \
a844f451 NS	170	(((lev) == (cur)->bc_nlevels - 1 ? \
	171	XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur),\
	172	xfs_bmdr, (lev) == 0) : \
	173	((cur)->bc_mp->m_bmap_dmnr[(lev) != 0])))
1da177e4	174	#define XFS_BMAP_BLOCK_IMINRECS(lev,cur) \
a844f451 NS	175	(((lev) == (cur)->bc_nlevels - 1 ? \
	176	XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur),\
	177	xfs_bmbt, (lev) == 0) : \
	178	((cur)->bc_mp->m_bmap_dmnr[(lev) != 0])))
	179
2c36dded ES	180	#define XFS_BMAP_REC_DADDR(bb,i,cur) (XFS_BTREE_REC_ADDR(xfs_bmbt, bb, i))
	181
	182	#define XFS_BMAP_REC_IADDR(bb,i,cur) (XFS_BTREE_REC_ADDR(xfs_bmbt, bb, i))
a844f451 NS	183
a844f451 NS	184	#define XFS_BMAP_KEY_DADDR(bb,i,cur) \
2c36dded ES	185	(XFS_BTREE_KEY_ADDR(xfs_bmbt, bb, i))
2c36dded ES	186
a844f451	187	#define XFS_BMAP_KEY_IADDR(bb,i,cur) \
2c36dded	188	(XFS_BTREE_KEY_ADDR(xfs_bmbt, bb, i))
a844f451 NS	189
a844f451 NS	190	#define XFS_BMAP_PTR_DADDR(bb,i,cur) \
2c36dded	191	(XFS_BTREE_PTR_ADDR(xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS( \
16259e7d	192	be16_to_cpu((bb)->bb_level), cur)))
a844f451	193	#define XFS_BMAP_PTR_IADDR(bb,i,cur) \
2c36dded	194	(XFS_BTREE_PTR_ADDR(xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS( \
16259e7d	195	be16_to_cpu((bb)->bb_level), cur)))
1da177e4 LT	196
	197	/*
	198	* These are to be used when we know the size of the block and
	199	* we don't have a cursor.
	200	*/
1da177e4	201	#define XFS_BMAP_BROOT_REC_ADDR(bb,i,sz) \
2c36dded	202	(XFS_BTREE_REC_ADDR(xfs_bmbt,bb,i))
1da177e4	203	#define XFS_BMAP_BROOT_KEY_ADDR(bb,i,sz) \
2c36dded	204	(XFS_BTREE_KEY_ADDR(xfs_bmbt,bb,i))
1da177e4	205	#define XFS_BMAP_BROOT_PTR_ADDR(bb,i,sz) \
2c36dded	206	(XFS_BTREE_PTR_ADDR(xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz)))
a844f451	207
16259e7d	208	#define XFS_BMAP_BROOT_NUMRECS(bb) be16_to_cpu((bb)->bb_numrecs)
a844f451	209	#define XFS_BMAP_BROOT_MAXRECS(sz) XFS_BTREE_BLOCK_MAXRECS(sz,xfs_bmbt,0)
1da177e4	210
1da177e4	211	#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) \
a844f451 NS	212	(int)(sizeof(xfs_bmbt_block_t) + \
	213	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
	214
1da177e4	215	#define XFS_BMAP_BROOT_SPACE(bb) \
16259e7d	216	(XFS_BMAP_BROOT_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
a844f451 NS	217	#define XFS_BMDR_SPACE_CALC(nrecs) \
	218	(int)(sizeof(xfs_bmdr_block_t) + \
	219	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
1da177e4 LT	220
	221	/*
	222	* Maximum number of bmap btree levels.
	223	*/
a844f451	224	#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
1da177e4	225
a844f451	226	#define XFS_BMAP_SANITY_CHECK(mp,bb,level) \
16259e7d CH	227	(be32_to_cpu((bb)->bb_magic) == XFS_BMAP_MAGIC && \
	228	be16_to_cpu((bb)->bb_level) == level && \
	229	be16_to_cpu((bb)->bb_numrecs) > 0 && \
	230	be16_to_cpu((bb)->bb_numrecs) <= (mp)->m_bmap_dmxr[(level) != 0])
1da177e4 LT	231
	232
	233	#ifdef __KERNEL__
	234
	235	#if defined(XFS_BMBT_TRACE)
	236	/*
	237	* Trace buffer entry types.
	238	*/
	239	#define XFS_BMBT_KTRACE_ARGBI 1
	240	#define XFS_BMBT_KTRACE_ARGBII 2
	241	#define XFS_BMBT_KTRACE_ARGFFFI 3
	242	#define XFS_BMBT_KTRACE_ARGI 4
	243	#define XFS_BMBT_KTRACE_ARGIFK 5
	244	#define XFS_BMBT_KTRACE_ARGIFR 6
	245	#define XFS_BMBT_KTRACE_ARGIK 7
	246	#define XFS_BMBT_KTRACE_CUR 8
	247
	248	#define XFS_BMBT_TRACE_SIZE 4096 /* size of global trace buffer */
	249	#define XFS_BMBT_KTRACE_SIZE 32 /* size of per-inode trace buffer */
	250	extern ktrace_t *xfs_bmbt_trace_buf;
	251	#endif
	252
	253	/*
	254	* Prototypes for xfs_bmap.c to call.
	255	*/
a844f451 NS	256	extern void xfs_bmdr_to_bmbt(xfs_bmdr_block_t , int, xfs_bmbt_block_t , int);
	257	extern int xfs_bmbt_decrement(struct xfs_btree_cur , int, int );
	258	extern int xfs_bmbt_delete(struct xfs_btree_cur , int );
a6f64d4a	259	extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t r, xfs_bmbt_irec_t s);
a844f451 NS	260	extern xfs_bmbt_block_t xfs_bmbt_get_block(struct xfs_btree_cur cur,
a844f451 NS	261	int, struct xfs_buf **bpp);
a6f64d4a CH	262	extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r);
	263	extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r);
	264	extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r);
	265	extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_host_t *r);
1da177e4	266
a844f451	267	extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t r, xfs_bmbt_irec_t s);
a844f451	268	extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r);
a844f451	269	extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r);
1da177e4	270
a844f451 NS	271	extern int xfs_bmbt_increment(struct xfs_btree_cur , int, int );
	272	extern int xfs_bmbt_insert(struct xfs_btree_cur , int );
	273	extern void xfs_bmbt_log_block(struct xfs_btree_cur , struct xfs_buf , int);
	274	extern void xfs_bmbt_log_recs(struct xfs_btree_cur , struct xfs_buf , int,
	275	int);
	276	extern int xfs_bmbt_lookup_eq(struct xfs_btree_cur *, xfs_fileoff_t,
	277	xfs_fsblock_t, xfs_filblks_t, int *);
	278	extern int xfs_bmbt_lookup_ge(struct xfs_btree_cur *, xfs_fileoff_t,
	279	xfs_fsblock_t, xfs_filblks_t, int *);
1da177e4	280
1da177e4 LT	281	/*
	282	* Give the bmap btree a new root block. Copy the old broot contents
	283	* down into a real block and make the broot point to it.
	284	*/
a844f451 NS	285	extern int xfs_bmbt_newroot(struct xfs_btree_cur cur, int lflags, int *stat);
a844f451 NS	286
a6f64d4a CH	287	extern void xfs_bmbt_set_all(xfs_bmbt_rec_host_t r, xfs_bmbt_irec_t s);
a6f64d4a CH	288	extern void xfs_bmbt_set_allf(xfs_bmbt_rec_host_t *r, xfs_fileoff_t o,
a844f451	289	xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
a6f64d4a CH	290	extern void xfs_bmbt_set_blockcount(xfs_bmbt_rec_host_t *r, xfs_filblks_t v);
	291	extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v);
	292	extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v);
	293	extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v);
1da177e4	294
a844f451 NS	295	extern void xfs_bmbt_disk_set_all(xfs_bmbt_rec_t r, xfs_bmbt_irec_t s);
	296	extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o,
	297	xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
1da177e4	298
a844f451 NS	299	extern void xfs_bmbt_to_bmdr(xfs_bmbt_block_t , int, xfs_bmdr_block_t , int);
	300	extern int xfs_bmbt_update(struct xfs_btree_cur *, xfs_fileoff_t,
	301	xfs_fsblock_t, xfs_filblks_t, xfs_exntst_t);
1da177e4	302
1da177e4 LT	303	#endif /* __KERNEL__ */
	304
	305	#endif /* __XFS_BMAP_BTREE_H__ */