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 structures 11 */ 12 13 struct xfs_buf; 14 struct xfs_btree_cur; 15 struct xfs_mount; 16 struct xbtree_afakeroot; 17 18 /* 19 * Btree block header size depends on a superblock flag. 20 */ 21 #define XFS_ALLOC_BLOCK_LEN(mp) \ 22 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ 23 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) 24 25 /* 26 * Record, key, and pointer address macros for btree blocks. 27 * 28 * (note that some of these may appear unused, but they are used in userspace) 29 */ 30 #define XFS_ALLOC_REC_ADDR(mp, block, index) \ 31 ((xfs_alloc_rec_t *) \ 32 ((char *)(block) + \ 33 XFS_ALLOC_BLOCK_LEN(mp) + \ 34 (((index) - 1) * sizeof(xfs_alloc_rec_t)))) 35 36 #define XFS_ALLOC_KEY_ADDR(mp, block, index) \ 37 ((xfs_alloc_key_t *) \ 38 ((char *)(block) + \ 39 XFS_ALLOC_BLOCK_LEN(mp) + \ 40 ((index) - 1) * sizeof(xfs_alloc_key_t))) 41 42 #define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \ 43 ((xfs_alloc_ptr_t *) \ 44 ((char *)(block) + \ 45 XFS_ALLOC_BLOCK_LEN(mp) + \ 46 (maxrecs) * sizeof(xfs_alloc_key_t) + \ 47 ((index) - 1) * sizeof(xfs_alloc_ptr_t))) 48 49 extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, 50 struct xfs_trans *, struct xfs_buf *, 51 xfs_agnumber_t, xfs_btnum_t); 52 struct xfs_btree_cur *xfs_allocbt_stage_cursor(struct xfs_mount *mp, 53 struct xbtree_afakeroot *afake, xfs_agnumber_t agno, 54 xfs_btnum_t btnum); 55 extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int); 56 extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp, 57 unsigned long long len); 58 59 void xfs_allocbt_commit_staged_btree(struct xfs_btree_cur *cur, 60 struct xfs_trans *tp, struct xfs_buf *agbp); 61 62 #endif /* __XFS_ALLOC_BTREE_H__ */ 63