xref: /openbmc/linux/fs/xfs/libxfs/xfs_ialloc_btree.h (revision 98ddec80)
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 
17 /*
18  * Btree block header size depends on a superblock flag.
19  */
20 #define XFS_INOBT_BLOCK_LEN(mp) \
21 	(xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
22 		XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
23 
24 /*
25  * Record, key, and pointer address macros for btree blocks.
26  *
27  * (note that some of these may appear unused, but they are used in userspace)
28  */
29 #define XFS_INOBT_REC_ADDR(mp, block, index) \
30 	((xfs_inobt_rec_t *) \
31 		((char *)(block) + \
32 		 XFS_INOBT_BLOCK_LEN(mp) + \
33 		 (((index) - 1) * sizeof(xfs_inobt_rec_t))))
34 
35 #define XFS_INOBT_KEY_ADDR(mp, block, index) \
36 	((xfs_inobt_key_t *) \
37 		((char *)(block) + \
38 		 XFS_INOBT_BLOCK_LEN(mp) + \
39 		 ((index) - 1) * sizeof(xfs_inobt_key_t)))
40 
41 #define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
42 	((xfs_inobt_ptr_t *) \
43 		((char *)(block) + \
44 		 XFS_INOBT_BLOCK_LEN(mp) + \
45 		 (maxrecs) * sizeof(xfs_inobt_key_t) + \
46 		 ((index) - 1) * sizeof(xfs_inobt_ptr_t)))
47 
48 extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *,
49 		struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t,
50 		xfs_btnum_t);
51 extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
52 
53 /* ir_holemask to inode allocation bitmap conversion */
54 uint64_t xfs_inobt_irec_to_allocmask(struct xfs_inobt_rec_incore *);
55 
56 #if defined(DEBUG) || defined(XFS_WARN)
57 int xfs_inobt_rec_check_count(struct xfs_mount *,
58 			      struct xfs_inobt_rec_incore *);
59 #else
60 #define xfs_inobt_rec_check_count(mp, rec)	0
61 #endif	/* DEBUG */
62 
63 int xfs_finobt_calc_reserves(struct xfs_mount *mp, xfs_agnumber_t agno,
64 		xfs_extlen_t *ask, xfs_extlen_t *used);
65 extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp,
66 		unsigned long long len);
67 
68 #endif	/* __XFS_IALLOC_BTREE_H__ */
69