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
17 struct xbtree_afakeroot;
20 * Btree block header size depends on a superblock flag.
22 #define XFS_ALLOC_BLOCK_LEN(mp) \
23 (xfs_has_crc(((mp))) ? \
24 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
27 * Record, key, and pointer address macros for btree blocks.
29 * (note that some of these may appear unused, but they are used in userspace)
31 #define XFS_ALLOC_REC_ADDR(mp, block, index) \
32 ((xfs_alloc_rec_t *) \
34 XFS_ALLOC_BLOCK_LEN(mp) + \
35 (((index) - 1) * sizeof(xfs_alloc_rec_t))))
37 #define XFS_ALLOC_KEY_ADDR(mp, block, index) \
38 ((xfs_alloc_key_t *) \
40 XFS_ALLOC_BLOCK_LEN(mp) + \
41 ((index) - 1) * sizeof(xfs_alloc_key_t)))
43 #define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \
44 ((xfs_alloc_ptr_t *) \
46 XFS_ALLOC_BLOCK_LEN(mp) + \
47 (maxrecs) * sizeof(xfs_alloc_key_t) + \
48 ((index) - 1) * sizeof(xfs_alloc_ptr_t)))
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,
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);
60 void xfs_allocbt_commit_staged_btree(struct xfs_btree_cur *cur,
61 struct xfs_trans *tp, struct xfs_buf *agbp);
63 unsigned int xfs_allocbt_maxlevels_ondisk(void);
65 int __init xfs_allocbt_init_cur_cache(void);
66 void xfs_allocbt_destroy_cur_cache(void);
68 #endif /* __XFS_ALLOC_BTREE_H__ */