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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.4 * All Rights Reserved.5 */6#ifndef __XFS_ALLOC_BTREE_H__7#define __XFS_ALLOC_BTREE_H__8 9/*10 * Freespace on-disk structures11 */12 13struct xfs_buf;14struct xfs_btree_cur;15struct xfs_mount;16struct xfs_perag;17struct xbtree_afakeroot;18 19/*20 * Btree block header size depends on a superblock flag.21 */22#define XFS_ALLOC_BLOCK_LEN(mp) \23 (xfs_has_crc(((mp))) ? \24 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)25 26/*27 * Record, key, and pointer address macros for btree blocks.28 *29 * (note that some of these may appear unused, but they are used in userspace)30 */31#define XFS_ALLOC_REC_ADDR(mp, block, index) \32 ((xfs_alloc_rec_t *) \33 ((char *)(block) + \34 XFS_ALLOC_BLOCK_LEN(mp) + \35 (((index) - 1) * sizeof(xfs_alloc_rec_t))))36 37#define XFS_ALLOC_KEY_ADDR(mp, block, index) \38 ((xfs_alloc_key_t *) \39 ((char *)(block) + \40 XFS_ALLOC_BLOCK_LEN(mp) + \41 ((index) - 1) * sizeof(xfs_alloc_key_t)))42 43#define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \44 ((xfs_alloc_ptr_t *) \45 ((char *)(block) + \46 XFS_ALLOC_BLOCK_LEN(mp) + \47 (maxrecs) * sizeof(xfs_alloc_key_t) + \48 ((index) - 1) * sizeof(xfs_alloc_ptr_t)))49 50struct xfs_btree_cur *xfs_bnobt_init_cursor(struct xfs_mount *mp,51 struct xfs_trans *tp, struct xfs_buf *bp,52 struct xfs_perag *pag);53struct xfs_btree_cur *xfs_cntbt_init_cursor(struct xfs_mount *mp,54 struct xfs_trans *tp, struct xfs_buf *bp,55 struct xfs_perag *pag);56unsigned int xfs_allocbt_maxrecs(struct xfs_mount *mp, unsigned int blocklen,57 bool leaf);58extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp,59 unsigned long long len);60 61void xfs_allocbt_commit_staged_btree(struct xfs_btree_cur *cur,62 struct xfs_trans *tp, struct xfs_buf *agbp);63 64unsigned int xfs_allocbt_maxlevels_ondisk(void);65 66int __init xfs_allocbt_init_cur_cache(void);67void xfs_allocbt_destroy_cur_cache(void);68 69#endif /* __XFS_ALLOC_BTREE_H__ */70