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 xfs_perag; 17 struct 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 50 extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *mp, 51 struct xfs_trans *tp, struct xfs_buf *bp, 52 struct xfs_perag *pag, xfs_btnum_t btnum); 53 struct xfs_btree_cur *xfs_allocbt_stage_cursor(struct xfs_mount *mp, 54 struct xbtree_afakeroot *afake, struct xfs_perag *pag, 55 xfs_btnum_t btnum); 56 extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int); 57 extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp, 58 unsigned long long len); 59 60 void xfs_allocbt_commit_staged_btree(struct xfs_btree_cur *cur, 61 struct xfs_trans *tp, struct xfs_buf *agbp); 62 63 #endif /* __XFS_ALLOC_BTREE_H__ */ 64