1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
6 #ifndef __XFS_BMAP_BTREE_H__
7 #define __XFS_BMAP_BTREE_H__
10 struct xfs_btree_block;
14 struct xbtree_ifakeroot;
17 * Btree block header size depends on a superblock flag.
19 #define XFS_BMBT_BLOCK_LEN(mp) \
20 (xfs_has_crc(((mp))) ? \
21 XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)
23 #define XFS_BMBT_REC_ADDR(mp, block, index) \
26 XFS_BMBT_BLOCK_LEN(mp) + \
27 ((index) - 1) * sizeof(xfs_bmbt_rec_t)))
29 #define XFS_BMBT_KEY_ADDR(mp, block, index) \
32 XFS_BMBT_BLOCK_LEN(mp) + \
33 ((index) - 1) * sizeof(xfs_bmbt_key_t)))
35 #define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \
38 XFS_BMBT_BLOCK_LEN(mp) + \
39 (maxrecs) * sizeof(xfs_bmbt_key_t) + \
40 ((index) - 1) * sizeof(xfs_bmbt_ptr_t)))
42 #define XFS_BMDR_REC_ADDR(block, index) \
45 sizeof(struct xfs_bmdr_block) + \
46 ((index) - 1) * sizeof(xfs_bmdr_rec_t)))
48 #define XFS_BMDR_KEY_ADDR(block, index) \
51 sizeof(struct xfs_bmdr_block) + \
52 ((index) - 1) * sizeof(xfs_bmdr_key_t)))
54 #define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \
57 sizeof(struct xfs_bmdr_block) + \
58 (maxrecs) * sizeof(xfs_bmdr_key_t) + \
59 ((index) - 1) * sizeof(xfs_bmdr_ptr_t)))
62 * These are to be used when we know the size of the block and
63 * we don't have a cursor.
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))
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))))
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)))
81 * Maximum number of bmap btree levels.
83 #define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
86 * Prototypes for xfs_bmap.c to call.
88 extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
89 struct xfs_btree_block *, int);
91 void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s);
92 extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(const struct xfs_bmbt_rec *r);
93 extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r);
94 void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r,
95 struct xfs_bmbt_irec *s);
97 extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int,
98 xfs_bmdr_block_t *, int);
100 extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
101 extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
102 extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
104 extern 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);
108 extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
109 struct xfs_trans *, struct xfs_inode *, int);
110 struct xfs_btree_cur *xfs_bmbt_stage_cursor(struct xfs_mount *mp,
111 struct xfs_inode *ip, struct xbtree_ifakeroot *ifake);
112 void xfs_bmbt_commit_staged_btree(struct xfs_btree_cur *cur,
113 struct xfs_trans *tp, int whichfork);
115 extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp,
116 unsigned long long len);
118 unsigned int xfs_bmbt_maxlevels_ondisk(void);
120 int __init xfs_bmbt_init_cur_cache(void);
121 void xfs_bmbt_destroy_cur_cache(void);
123 #endif /* __XFS_BMAP_BTREE_H__ */