1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#ifndef __XFS_BMAP_BTREE_H__
7#define __XFS_BMAP_BTREE_H__
8
9struct xfs_btree_cur;
10struct xfs_btree_block;
11struct xfs_mount;
12struct xfs_inode;
13struct xfs_trans;
14struct xbtree_ifakeroot;
15
16/*
17 * Btree block header size depends on a superblock flag.
18 */
19#define XFS_BMBT_BLOCK_LEN(mp) \
20 (xfs_has_crc(((mp))) ? \
21 XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)
22
23#define XFS_BMBT_REC_ADDR(mp, block, index) \
24 ((xfs_bmbt_rec_t *) \
25 ((char *)(block) + \
26 XFS_BMBT_BLOCK_LEN(mp) + \
27 ((index) - 1) * sizeof(xfs_bmbt_rec_t)))
28
29#define XFS_BMBT_KEY_ADDR(mp, block, index) \
30 ((xfs_bmbt_key_t *) \
31 ((char *)(block) + \
32 XFS_BMBT_BLOCK_LEN(mp) + \
33 ((index) - 1) * sizeof(xfs_bmbt_key_t)))
34
35#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \
36 ((xfs_bmbt_ptr_t *) \
37 ((char *)(block) + \
38 XFS_BMBT_BLOCK_LEN(mp) + \
39 (maxrecs) * sizeof(xfs_bmbt_key_t) + \
40 ((index) - 1) * sizeof(xfs_bmbt_ptr_t)))
41
42#define XFS_BMDR_REC_ADDR(block, index) \
43 ((xfs_bmdr_rec_t *) \
44 ((char *)(block) + \
45 sizeof(struct xfs_bmdr_block) + \
46 ((index) - 1) * sizeof(xfs_bmdr_rec_t)))
47
48#define XFS_BMDR_KEY_ADDR(block, index) \
49 ((xfs_bmdr_key_t *) \
50 ((char *)(block) + \
51 sizeof(struct xfs_bmdr_block) + \
52 ((index) - 1) * sizeof(xfs_bmdr_key_t)))
53
54#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \
55 ((xfs_bmdr_ptr_t *) \
56 ((char *)(block) + \
57 sizeof(struct xfs_bmdr_block) + \
58 (maxrecs) * sizeof(xfs_bmdr_key_t) + \
59 ((index) - 1) * sizeof(xfs_bmdr_ptr_t)))
60
61/*
62 * These are to be used when we know the size of the block and
63 * we don't have a cursor.
64 */
65#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \
66 XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0))
67
68#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \
69 (int)(XFS_BMBT_BLOCK_LEN(mp) + \
70 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
71
72#define XFS_BMAP_BROOT_SPACE(mp, bb) \
73 (XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs)))
74#define XFS_BMDR_SPACE_CALC(nrecs) \
75 (int)(sizeof(xfs_bmdr_block_t) + \
76 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
77#define XFS_BMAP_BMDR_SPACE(bb) \
78 (XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
79
80/*
81 * Maximum number of bmap btree levels.
82 */
83#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
84
85/*
86 * Prototypes for xfs_bmap.c to call.
87 */
88extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
89 struct xfs_btree_block *, int);
90
91void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s);
92extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(const struct xfs_bmbt_rec *r);
93extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r);
94void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r,
95 struct xfs_bmbt_irec *s);
96
97extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int,
98 xfs_bmdr_block_t *, int);
99
100extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
101extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
102extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
103
104extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip,
105 int whichfork, xfs_ino_t new_owner,
106 struct list_head *buffer_list);
107
108extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
109 struct xfs_trans *, struct xfs_inode *, int);
110void xfs_bmbt_commit_staged_btree(struct xfs_btree_cur *cur,
111 struct xfs_trans *tp, int whichfork);
112
113extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp,
114 unsigned long long len);
115
116unsigned int xfs_bmbt_maxlevels_ondisk(void);
117
118int __init xfs_bmbt_init_cur_cache(void);
119void xfs_bmbt_destroy_cur_cache(void);
120
121void xfs_bmbt_init_block(struct xfs_inode *ip, struct xfs_btree_block *buf,
122 struct xfs_buf *bp, __u16 level, __u16 numrecs);
123
124#endif /* __XFS_BMAP_BTREE_H__ */
125

source code of linux/fs/xfs/libxfs/xfs_bmap_btree.h