1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
6 #ifndef __XFS_ALLOC_BTREE_H__
7 #define __XFS_ALLOC_BTREE_H__
10 * Freespace on-disk structures
16 struct xbtree_afakeroot;
19 * Btree block header size depends on a superblock flag.
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)
26 * Record, key, and pointer address macros for btree blocks.
28 * (note that some of these may appear unused, but they are used in userspace)
30 #define XFS_ALLOC_REC_ADDR(mp, block, index) \
31 ((xfs_alloc_rec_t *) \
33 XFS_ALLOC_BLOCK_LEN(mp) + \
34 (((index) - 1) * sizeof(xfs_alloc_rec_t))))
36 #define XFS_ALLOC_KEY_ADDR(mp, block, index) \
37 ((xfs_alloc_key_t *) \
39 XFS_ALLOC_BLOCK_LEN(mp) + \
40 ((index) - 1) * sizeof(xfs_alloc_key_t)))
42 #define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \
43 ((xfs_alloc_ptr_t *) \
45 XFS_ALLOC_BLOCK_LEN(mp) + \
46 (maxrecs) * sizeof(xfs_alloc_key_t) + \
47 ((index) - 1) * sizeof(xfs_alloc_ptr_t)))
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,
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);
59 void xfs_allocbt_commit_staged_btree(struct xfs_btree_cur *cur,
60 struct xfs_trans *tp, struct xfs_buf *agbp);
62 #endif /* __XFS_ALLOC_BTREE_H__ */