[linux-2.6-block.git] / fs / xfs / libxfs / xfs_bmap_btree.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#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_has_crc(((mp))) ? \
		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(const struct xfs_bmbt_rec *r);
extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r);
void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r,
		struct xfs_bmbt_irec *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);

extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp,
		unsigned long long len);

#endif	/* __XFS_BMAP_BTREE_H__ */
Commit	Line	Data
508578f2	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4	2	/*
7b718769 NS	3	* Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
7b718769 NS	4	* All Rights Reserved.
1da177e4 LT	5	*/
	6	#ifndef __XFS_BMAP_BTREE_H__
	7	#define __XFS_BMAP_BTREE_H__
	8
1da177e4	9	struct xfs_btree_cur;
136341b4	10	struct xfs_btree_block;
1da177e4 LT	11	struct xfs_mount;
1da177e4 LT	12	struct xfs_inode;
561f7d17	13	struct xfs_trans;
1da177e4	14
7cc95a82 CH	15	/*
7cc95a82 CH	16	* Btree block header size depends on a superblock flag.
7cc95a82	17	*/
ee1a47ab	18	#define XFS_BMBT_BLOCK_LEN(mp) \
38c26bfd	19	(xfs_has_crc(((mp))) ? \
ee1a47ab	20	XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)
1da177e4	21
136341b4 CH	22	#define XFS_BMBT_REC_ADDR(mp, block, index) \
	23	((xfs_bmbt_rec_t *) \
	24	((char *)(block) + \
7cc95a82	25	XFS_BMBT_BLOCK_LEN(mp) + \
136341b4 CH	26	((index) - 1) * sizeof(xfs_bmbt_rec_t)))
	27
	28	#define XFS_BMBT_KEY_ADDR(mp, block, index) \
	29	((xfs_bmbt_key_t *) \
	30	((char *)(block) + \
7cc95a82	31	XFS_BMBT_BLOCK_LEN(mp) + \
136341b4 CH	32	((index) - 1) * sizeof(xfs_bmbt_key_t)))
	33
	34	#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \
	35	((xfs_bmbt_ptr_t *) \
	36	((char *)(block) + \
7cc95a82	37	XFS_BMBT_BLOCK_LEN(mp) + \
136341b4 CH	38	(maxrecs) * sizeof(xfs_bmbt_key_t) + \
	39	((index) - 1) * sizeof(xfs_bmbt_ptr_t)))
	40
	41	#define XFS_BMDR_REC_ADDR(block, index) \
	42	((xfs_bmdr_rec_t *) \
	43	((char *)(block) + \
	44	sizeof(struct xfs_bmdr_block) + \
	45	((index) - 1) * sizeof(xfs_bmdr_rec_t)))
	46
	47	#define XFS_BMDR_KEY_ADDR(block, index) \
	48	((xfs_bmdr_key_t *) \
	49	((char *)(block) + \
	50	sizeof(struct xfs_bmdr_block) + \
	51	((index) - 1) * sizeof(xfs_bmdr_key_t)))
	52
	53	#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \
	54	((xfs_bmdr_ptr_t *) \
	55	((char *)(block) + \
	56	sizeof(struct xfs_bmdr_block) + \
	57	(maxrecs) * sizeof(xfs_bmdr_key_t) + \
	58	((index) - 1) * sizeof(xfs_bmdr_ptr_t)))
1da177e4 LT	59
	60	/*
	61	* These are to be used when we know the size of the block and
	62	* we don't have a cursor.
	63	*/
136341b4 CH	64	#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \
136341b4 CH	65	XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0))
1da177e4	66
ee1a47ab CH	67	#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \
ee1a47ab CH	68	(int)(XFS_BMBT_BLOCK_LEN(mp) + \
a844f451 NS	69	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
a844f451 NS	70
ee1a47ab CH	71	#define XFS_BMAP_BROOT_SPACE(mp, bb) \
ee1a47ab CH	72	(XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs)))
a844f451 NS	73	#define XFS_BMDR_SPACE_CALC(nrecs) \
	74	(int)(sizeof(xfs_bmdr_block_t) + \
	75	((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
427d9fe2 ES	76	#define XFS_BMAP_BMDR_SPACE(bb) \
427d9fe2 ES	77	(XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
1da177e4 LT	78
	79	/*
	80	* Maximum number of bmap btree levels.
	81	*/
a844f451	82	#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
1da177e4	83
1da177e4 LT	84	/*
	85	* Prototypes for xfs_bmap.c to call.
	86	*/
ee1a47ab	87	extern void xfs_bmdr_to_bmbt(struct xfs_inode , xfs_bmdr_block_t , int,
7cc95a82	88	struct xfs_btree_block *, int);
1da177e4	89
a67d00a5	90	void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec r, struct xfs_bmbt_irec s);
23825cd1 DW	91	extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(const struct xfs_bmbt_rec *r);
23825cd1 DW	92	extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r);
22ece4e8 DW	93	void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r,
22ece4e8 DW	94	struct xfs_bmbt_irec *s);
1da177e4	95
7cc95a82	96	extern void xfs_bmbt_to_bmdr(struct xfs_mount , struct xfs_btree_block , int,
60197e8d CH	97	xfs_bmdr_block_t *, int);
	98
	99	extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
152d93b7	100	extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
60197e8d	101	extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
1da177e4	102
21b5c978	103	extern int xfs_bmbt_change_owner(struct xfs_trans tp, struct xfs_inode ip,
638f4416 DC	104	int whichfork, xfs_ino_t new_owner,
638f4416 DC	105	struct list_head *buffer_list);
21b5c978	106
561f7d17 CH	107	extern struct xfs_btree_cur xfs_bmbt_init_cursor(struct xfs_mount ,
	108	struct xfs_trans , struct xfs_inode , int);
	109
14861c47 DW	110	extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp,
	111	unsigned long long len);
	112
1da177e4	113	#endif /* __XFS_BMAP_BTREE_H__ */