1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
 4 * All Rights Reserved.
 5 */
 6#ifndef __XFS_IALLOC_BTREE_H__
 7#define	__XFS_IALLOC_BTREE_H__
 8
 9/*
10 * Inode map on-disk structures
11 */
12
13struct xfs_buf;
14struct xfs_btree_cur;
15struct xfs_mount;
16struct xfs_perag;
17
18/*
19 * Btree block header size depends on a superblock flag.
20 */
21#define XFS_INOBT_BLOCK_LEN(mp) \
22	(xfs_has_crc(((mp))) ? \
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_INOBT_REC_ADDR(mp, block, index) \
31	((xfs_inobt_rec_t *) \
32		((char *)(block) + \
33		 XFS_INOBT_BLOCK_LEN(mp) + \
34		 (((index) - 1) * sizeof(xfs_inobt_rec_t))))
35
36#define XFS_INOBT_KEY_ADDR(mp, block, index) \
37	((xfs_inobt_key_t *) \
38		((char *)(block) + \
39		 XFS_INOBT_BLOCK_LEN(mp) + \
40		 ((index) - 1) * sizeof(xfs_inobt_key_t)))
41
42#define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
43	((xfs_inobt_ptr_t *) \
44		((char *)(block) + \
45		 XFS_INOBT_BLOCK_LEN(mp) + \
46		 (maxrecs) * sizeof(xfs_inobt_key_t) + \
47		 ((index) - 1) * sizeof(xfs_inobt_ptr_t)))
48
49extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *mp,
50		struct xfs_trans *tp, struct xfs_buf *agbp,
51		struct xfs_perag *pag, xfs_btnum_t btnum);
52struct xfs_btree_cur *xfs_inobt_stage_cursor(struct xfs_mount *mp,
53		struct xbtree_afakeroot *afake, struct xfs_perag *pag,
54		xfs_btnum_t btnum);
55extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
56
57/* ir_holemask to inode allocation bitmap conversion */
58uint64_t xfs_inobt_irec_to_allocmask(struct xfs_inobt_rec_incore *);
59
60#if defined(DEBUG) || defined(XFS_WARN)
61int xfs_inobt_rec_check_count(struct xfs_mount *,
62			      struct xfs_inobt_rec_incore *);
63#else
64#define xfs_inobt_rec_check_count(mp, rec)	0
65#endif	/* DEBUG */
66
67int xfs_finobt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp,
68		struct xfs_perag *pag, xfs_extlen_t *ask, xfs_extlen_t *used);
69extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp,
70		unsigned long long len);
71int xfs_inobt_cur(struct xfs_mount *mp, struct xfs_trans *tp,
72		struct xfs_perag *pag, xfs_btnum_t btnum,
73		struct xfs_btree_cur **curpp, struct xfs_buf **agi_bpp);
74
75void xfs_inobt_commit_staged_btree(struct xfs_btree_cur *cur,
76		struct xfs_trans *tp, struct xfs_buf *agbp);
77
78unsigned int xfs_iallocbt_maxlevels_ondisk(void);
79
80int __init xfs_inobt_init_cur_cache(void);
81void xfs_inobt_destroy_cur_cache(void);
82
83#endif	/* __XFS_IALLOC_BTREE_H__ */