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 
13 struct xfs_buf;
14 struct xfs_btree_cur;
15 struct xfs_mount;
16 struct 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 
49 extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_perag *pag,
50 		struct xfs_trans *tp, struct xfs_buf *agbp, xfs_btnum_t btnum);
51 struct xfs_btree_cur *xfs_inobt_stage_cursor(struct xfs_perag *pag,
52 		struct xbtree_afakeroot *afake, xfs_btnum_t btnum);
53 extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
54 
55 /* ir_holemask to inode allocation bitmap conversion */
56 uint64_t xfs_inobt_irec_to_allocmask(struct xfs_inobt_rec_incore *);
57 
58 #if defined(DEBUG) || defined(XFS_WARN)
59 int xfs_inobt_rec_check_count(struct xfs_mount *,
60 			      struct xfs_inobt_rec_incore *);
61 #else
62 #define xfs_inobt_rec_check_count(mp, rec)	0
63 #endif	/* DEBUG */
64 
65 int xfs_finobt_calc_reserves(struct xfs_perag *perag, struct xfs_trans *tp,
66 		xfs_extlen_t *ask, xfs_extlen_t *used);
67 extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp,
68 		unsigned long long len);
69 int xfs_inobt_cur(struct xfs_perag *pag, struct xfs_trans *tp,
70 		xfs_btnum_t btnum, struct xfs_btree_cur **curpp,
71 		struct xfs_buf **agi_bpp);
72 
73 void xfs_inobt_commit_staged_btree(struct xfs_btree_cur *cur,
74 		struct xfs_trans *tp, struct xfs_buf *agbp);
75 
76 unsigned int xfs_iallocbt_maxlevels_ondisk(void);
77 
78 int __init xfs_inobt_init_cur_cache(void);
79 void xfs_inobt_destroy_cur_cache(void);
80 
81 #endif	/* __XFS_IALLOC_BTREE_H__ */
82