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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2000,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#ifndef __XFS_ALLOC_BTREE_H__
#define __XFS_ALLOC_BTREE_H__
/*
* Freespace on-disk structures
*/
struct xfs_buf;
struct xfs_btree_cur;
struct xfs_mount;
struct xfs_perag;
struct xbtree_afakeroot;
/*
* Btree block header size depends on a superblock flag.
*/
#define XFS_ALLOC_BLOCK_LEN(mp) \
(xfs_has_crc(((mp))) ? \
XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
/*
* Record, key, and pointer address macros for btree blocks.
*
* (note that some of these may appear unused, but they are used in userspace)
*/
#define XFS_ALLOC_REC_ADDR(mp, block, index) \
((xfs_alloc_rec_t *) \
((char *)(block) + \
XFS_ALLOC_BLOCK_LEN(mp) + \
(((index) - 1) * sizeof(xfs_alloc_rec_t))))
#define XFS_ALLOC_KEY_ADDR(mp, block, index) \
((xfs_alloc_key_t *) \
((char *)(block) + \
XFS_ALLOC_BLOCK_LEN(mp) + \
((index) - 1) * sizeof(xfs_alloc_key_t)))
#define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \
((xfs_alloc_ptr_t *) \
((char *)(block) + \
XFS_ALLOC_BLOCK_LEN(mp) + \
(maxrecs) * sizeof(xfs_alloc_key_t) + \
((index) - 1) * sizeof(xfs_alloc_ptr_t)))
extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *mp,
struct xfs_trans *tp, struct xfs_buf *bp,
struct xfs_perag *pag, xfs_btnum_t btnum);
struct xfs_btree_cur *xfs_allocbt_stage_cursor(struct xfs_mount *mp,
struct xbtree_afakeroot *afake, struct xfs_perag *pag,
xfs_btnum_t btnum);
extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int);
extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp,
unsigned long long len);
void xfs_allocbt_commit_staged_btree(struct xfs_btree_cur *cur,
struct xfs_trans *tp, struct xfs_buf *agbp);
unsigned int xfs_allocbt_maxlevels_ondisk(void);
int __init xfs_allocbt_init_cur_cache(void);
void xfs_allocbt_destroy_cur_cache(void);
#endif /* __XFS_ALLOC_BTREE_H__ */
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