[mirror_ubuntu-artful-kernel.git] / fs / xfs / libxfs / 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__

struct xfs_btree_cur;
struct xfs_btree_block;
struct xfs_mount;
struct xfs_inode;
struct xfs_trans;

/*
 * 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)

/*
 * Btree block header size depends on a superblock flag.
 */
#define XFS_BMBT_BLOCK_LEN(mp) \
	(xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
		XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)

#define XFS_BMBT_REC_ADDR(mp, block, index) \
	((xfs_bmbt_rec_t *) \
		((char *)(block) + \
		 XFS_BMBT_BLOCK_LEN(mp) + \
		 ((index) - 1) * sizeof(xfs_bmbt_rec_t)))

#define XFS_BMBT_KEY_ADDR(mp, block, index) \
	((xfs_bmbt_key_t *) \
		((char *)(block) + \
		 XFS_BMBT_BLOCK_LEN(mp) + \
		 ((index) - 1) * sizeof(xfs_bmbt_key_t)))

#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \
	((xfs_bmbt_ptr_t *) \
		((char *)(block) + \
		 XFS_BMBT_BLOCK_LEN(mp) + \
		 (maxrecs) * sizeof(xfs_bmbt_key_t) + \
		 ((index) - 1) * sizeof(xfs_bmbt_ptr_t)))

#define XFS_BMDR_REC_ADDR(block, index) \
	((xfs_bmdr_rec_t *) \
		((char *)(block) + \
		 sizeof(struct xfs_bmdr_block) + \
	         ((index) - 1) * sizeof(xfs_bmdr_rec_t)))

#define XFS_BMDR_KEY_ADDR(block, index) \
	((xfs_bmdr_key_t *) \
		((char *)(block) + \
		 sizeof(struct xfs_bmdr_block) + \
		 ((index) - 1) * sizeof(xfs_bmdr_key_t)))

#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \
	((xfs_bmdr_ptr_t *) \
		((char *)(block) + \
		 sizeof(struct xfs_bmdr_block) + \
		 (maxrecs) * sizeof(xfs_bmdr_key_t) + \
		 ((index) - 1) * sizeof(xfs_bmdr_ptr_t)))

/*
 * These are to be used when we know the size of the block and
 * we don't have a cursor.
 */
#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \
	XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0))

#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \
	(int)(XFS_BMBT_BLOCK_LEN(mp) + \
	       ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))

#define XFS_BMAP_BROOT_SPACE(mp, bb) \
	(XFS_BMAP_BROOT_SPACE_CALC(mp, 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))))
#define XFS_BMAP_BMDR_SPACE(bb) \
	(XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))

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

/*
 * Prototypes for xfs_bmap.c to call.
 */
extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
			struct xfs_btree_block *, int);
extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s);
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 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 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_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(struct xfs_mount *, struct xfs_btree_block *, int,
			xfs_bmdr_block_t *, int);

extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);

extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip,
				 int whichfork, xfs_ino_t new_owner,
				 struct list_head *buffer_list);

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

#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
1da177e4	21	struct xfs_btree_cur;
136341b4	22	struct xfs_btree_block;
1da177e4 LT	23	struct xfs_mount;
1da177e4 LT	24	struct xfs_inode;
561f7d17	25	struct xfs_trans;
1da177e4	26
1da177e4 LT	27	/*
	28	* Extent state and extent format macros.
	29	*/
a844f451	30	#define XFS_EXTFMT_INODE(x) \
62118709	31	(xfs_sb_version_hasextflgbit(&((x)->i_mount->m_sb)) ? \
a844f451	32	XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE)
1da177e4 LT	33	#define ISUNWRITTEN(x) ((x)->br_state == XFS_EXT_UNWRITTEN)
1da177e4 LT	34
7cc95a82 CH	35	/*
7cc95a82 CH	36	* Btree block header size depends on a superblock flag.
7cc95a82	37	*/
ee1a47ab CH	38	#define XFS_BMBT_BLOCK_LEN(mp) \
	39	(xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
	40	XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)
1da177e4	41
136341b4 CH	42	#define XFS_BMBT_REC_ADDR(mp, block, index) \
	43	((xfs_bmbt_rec_t *) \
	44	((char *)(block) + \
7cc95a82	45	XFS_BMBT_BLOCK_LEN(mp) + \
136341b4 CH	46	((index) - 1) * sizeof(xfs_bmbt_rec_t)))
	47
	48	#define XFS_BMBT_KEY_ADDR(mp, block, index) \
	49	((xfs_bmbt_key_t *) \
	50	((char *)(block) + \
7cc95a82	51	XFS_BMBT_BLOCK_LEN(mp) + \
136341b4 CH	52	((index) - 1) * sizeof(xfs_bmbt_key_t)))
	53
	54	#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \
	55	((xfs_bmbt_ptr_t *) \
	56	((char *)(block) + \
7cc95a82	57	XFS_BMBT_BLOCK_LEN(mp) + \
136341b4 CH	58	(maxrecs) * sizeof(xfs_bmbt_key_t) + \
	59	((index) - 1) * sizeof(xfs_bmbt_ptr_t)))
	60
	61	#define XFS_BMDR_REC_ADDR(block, index) \
	62	((xfs_bmdr_rec_t *) \
	63	((char *)(block) + \
	64	sizeof(struct xfs_bmdr_block) + \
	65	((index) - 1) * sizeof(xfs_bmdr_rec_t)))
	66
	67	#define XFS_BMDR_KEY_ADDR(block, index) \
	68	((xfs_bmdr_key_t *) \
	69	((char *)(block) + \
	70	sizeof(struct xfs_bmdr_block) + \
	71	((index) - 1) * sizeof(xfs_bmdr_key_t)))
	72
	73	#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \
	74	((xfs_bmdr_ptr_t *) \
	75	((char *)(block) + \
	76	sizeof(struct xfs_bmdr_block) + \
	77	(maxrecs) * sizeof(xfs_bmdr_key_t) + \
	78	((index) - 1) * sizeof(xfs_bmdr_ptr_t)))
1da177e4 LT	79
	80	/*
	81	* These are to be used when we know the size of the block and
	82	* we don't have a cursor.
	83	*/
136341b4 CH	84	#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \
136341b4 CH	85	XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0))
1da177e4	86
ee1a47ab CH	87	#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \
ee1a47ab CH	88	(int)(XFS_BMBT_BLOCK_LEN(mp) + \
a844f451 NS	89	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
a844f451 NS	90
ee1a47ab CH	91	#define XFS_BMAP_BROOT_SPACE(mp, bb) \
ee1a47ab CH	92	(XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs)))
a844f451 NS	93	#define XFS_BMDR_SPACE_CALC(nrecs) \
	94	(int)(sizeof(xfs_bmdr_block_t) + \
	95	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
427d9fe2 ES	96	#define XFS_BMAP_BMDR_SPACE(bb) \
427d9fe2 ES	97	(XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
1da177e4 LT	98
	99	/*
	100	* Maximum number of bmap btree levels.
	101	*/
a844f451	102	#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
1da177e4	103
1da177e4 LT	104	/*
	105	* Prototypes for xfs_bmap.c to call.
	106	*/
ee1a47ab	107	extern void xfs_bmdr_to_bmbt(struct xfs_inode , xfs_bmdr_block_t , int,
7cc95a82	108	struct xfs_btree_block *, int);
a6f64d4a	109	extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t r, xfs_bmbt_irec_t s);
a6f64d4a CH	110	extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r);
	111	extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r);
	112	extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r);
	113	extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_host_t *r);
1da177e4	114
a844f451	115	extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r);
a844f451	116	extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r);
1da177e4	117
a6f64d4a CH	118	extern void xfs_bmbt_set_all(xfs_bmbt_rec_host_t r, xfs_bmbt_irec_t s);
a6f64d4a CH	119	extern void xfs_bmbt_set_allf(xfs_bmbt_rec_host_t *r, xfs_fileoff_t o,
a844f451	120	xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
a6f64d4a CH	121	extern void xfs_bmbt_set_blockcount(xfs_bmbt_rec_host_t *r, xfs_filblks_t v);
	122	extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v);
	123	extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v);
	124	extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v);
1da177e4	125
a844f451 NS	126	extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o,
a844f451 NS	127	xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
1da177e4	128
7cc95a82	129	extern void xfs_bmbt_to_bmdr(struct xfs_mount , struct xfs_btree_block , int,
60197e8d CH	130	xfs_bmdr_block_t *, int);
	131
	132	extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
152d93b7	133	extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
60197e8d	134	extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
1da177e4	135
21b5c978	136	extern int xfs_bmbt_change_owner(struct xfs_trans tp, struct xfs_inode ip,
638f4416 DC	137	int whichfork, xfs_ino_t new_owner,
638f4416 DC	138	struct list_head *buffer_list);
21b5c978	139
561f7d17 CH	140	extern struct xfs_btree_cur xfs_bmbt_init_cursor(struct xfs_mount ,
	141	struct xfs_trans , struct xfs_inode , int);
	142
1da177e4	143	#endif /* __XFS_BMAP_BTREE_H__ */