// 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; /* * Btree block header size depends on a superblock flag. */ #define XFS_ALLOC_BLOCK_LEN(mp) \ (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ 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 *, struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t, xfs_btnum_t); 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); #endif /* __XFS_ALLOC_BTREE_H__ */