[mirror_ubuntu-jammy-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;

/*
 * 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);

void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *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 void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s);

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
7cc95a82 CH	27	/*
7cc95a82 CH	28	* Btree block header size depends on a superblock flag.
7cc95a82	29	*/
ee1a47ab CH	30	#define XFS_BMBT_BLOCK_LEN(mp) \
	31	(xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
	32	XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)
1da177e4	33
136341b4 CH	34	#define XFS_BMBT_REC_ADDR(mp, block, index) \
	35	((xfs_bmbt_rec_t *) \
	36	((char *)(block) + \
7cc95a82	37	XFS_BMBT_BLOCK_LEN(mp) + \
136341b4 CH	38	((index) - 1) * sizeof(xfs_bmbt_rec_t)))
	39
	40	#define XFS_BMBT_KEY_ADDR(mp, block, index) \
	41	((xfs_bmbt_key_t *) \
	42	((char *)(block) + \
7cc95a82	43	XFS_BMBT_BLOCK_LEN(mp) + \
136341b4 CH	44	((index) - 1) * sizeof(xfs_bmbt_key_t)))
	45
	46	#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \
	47	((xfs_bmbt_ptr_t *) \
	48	((char *)(block) + \
7cc95a82	49	XFS_BMBT_BLOCK_LEN(mp) + \
136341b4 CH	50	(maxrecs) * sizeof(xfs_bmbt_key_t) + \
	51	((index) - 1) * sizeof(xfs_bmbt_ptr_t)))
	52
	53	#define XFS_BMDR_REC_ADDR(block, index) \
	54	((xfs_bmdr_rec_t *) \
	55	((char *)(block) + \
	56	sizeof(struct xfs_bmdr_block) + \
	57	((index) - 1) * sizeof(xfs_bmdr_rec_t)))
	58
	59	#define XFS_BMDR_KEY_ADDR(block, index) \
	60	((xfs_bmdr_key_t *) \
	61	((char *)(block) + \
	62	sizeof(struct xfs_bmdr_block) + \
	63	((index) - 1) * sizeof(xfs_bmdr_key_t)))
	64
	65	#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \
	66	((xfs_bmdr_ptr_t *) \
	67	((char *)(block) + \
	68	sizeof(struct xfs_bmdr_block) + \
	69	(maxrecs) * sizeof(xfs_bmdr_key_t) + \
	70	((index) - 1) * sizeof(xfs_bmdr_ptr_t)))
1da177e4 LT	71
	72	/*
	73	* These are to be used when we know the size of the block and
	74	* we don't have a cursor.
	75	*/
136341b4 CH	76	#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \
136341b4 CH	77	XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0))
1da177e4	78
ee1a47ab CH	79	#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \
ee1a47ab CH	80	(int)(XFS_BMBT_BLOCK_LEN(mp) + \
a844f451 NS	81	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
a844f451 NS	82
ee1a47ab CH	83	#define XFS_BMAP_BROOT_SPACE(mp, bb) \
ee1a47ab CH	84	(XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs)))
a844f451 NS	85	#define XFS_BMDR_SPACE_CALC(nrecs) \
	86	(int)(sizeof(xfs_bmdr_block_t) + \
	87	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
427d9fe2 ES	88	#define XFS_BMAP_BMDR_SPACE(bb) \
427d9fe2 ES	89	(XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
1da177e4 LT	90
	91	/*
	92	* Maximum number of bmap btree levels.
	93	*/
a844f451	94	#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
1da177e4	95
1da177e4 LT	96	/*
	97	* Prototypes for xfs_bmap.c to call.
	98	*/
ee1a47ab	99	extern void xfs_bmdr_to_bmbt(struct xfs_inode , xfs_bmdr_block_t , int,
7cc95a82	100	struct xfs_btree_block *, int);
1da177e4	101
a67d00a5	102	void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec r, struct xfs_bmbt_irec s);
a844f451	103	extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r);
a844f451	104	extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r);
6bdcf26a	105	extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t r, xfs_bmbt_irec_t s);
1da177e4	106
7cc95a82	107	extern void xfs_bmbt_to_bmdr(struct xfs_mount , struct xfs_btree_block , int,
60197e8d CH	108	xfs_bmdr_block_t *, int);
	109
	110	extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
152d93b7	111	extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
60197e8d	112	extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
1da177e4	113
21b5c978	114	extern int xfs_bmbt_change_owner(struct xfs_trans tp, struct xfs_inode ip,
638f4416 DC	115	int whichfork, xfs_ino_t new_owner,
638f4416 DC	116	struct list_head *buffer_list);
21b5c978	117
561f7d17 CH	118	extern struct xfs_btree_cur xfs_bmbt_init_cursor(struct xfs_mount ,
	119	struct xfs_trans , struct xfs_inode , int);
	120
1da177e4	121	#endif /* __XFS_BMAP_BTREE_H__ */