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18#ifndef __XFS_IALLOC_BTREE_H__
19#define __XFS_IALLOC_BTREE_H__
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24
25struct xfs_buf;
26struct xfs_btree_cur;
27struct xfs_mount;
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31
32#define XFS_IBT_MAGIC 0x49414254
33
34typedef __uint64_t xfs_inofree_t;
35#define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t))
36#define XFS_INODES_PER_CHUNK_LOG (XFS_NBBYLOG + 3)
37#define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1)
38#define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i))
39
40static inline xfs_inofree_t xfs_inobt_maskn(int i, int n)
41{
42 return ((n >= XFS_INODES_PER_CHUNK ? 0 : XFS_INOBT_MASK(n)) - 1) << i;
43}
44
45
46
47
48typedef struct xfs_inobt_rec {
49 __be32 ir_startino;
50 __be32 ir_freecount;
51 __be64 ir_free;
52} xfs_inobt_rec_t;
53
54typedef struct xfs_inobt_rec_incore {
55 xfs_agino_t ir_startino;
56 __int32_t ir_freecount;
57 xfs_inofree_t ir_free;
58} xfs_inobt_rec_incore_t;
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63
64typedef struct xfs_inobt_key {
65 __be32 ir_startino;
66} xfs_inobt_key_t;
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68
69typedef __be32 xfs_inobt_ptr_t;
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73
74#define XFS_IBT_BLOCK(mp) ((xfs_agblock_t)(XFS_CNT_BLOCK(mp) + 1))
75#define XFS_PREALLOC_BLOCKS(mp) ((xfs_agblock_t)(XFS_IBT_BLOCK(mp) + 1))
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81
82#define XFS_INOBT_BLOCK_LEN(mp) XFS_BTREE_SBLOCK_LEN
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88
89#define XFS_INOBT_REC_ADDR(mp, block, index) \
90 ((xfs_inobt_rec_t *) \
91 ((char *)(block) + \
92 XFS_INOBT_BLOCK_LEN(mp) + \
93 (((index) - 1) * sizeof(xfs_inobt_rec_t))))
94
95#define XFS_INOBT_KEY_ADDR(mp, block, index) \
96 ((xfs_inobt_key_t *) \
97 ((char *)(block) + \
98 XFS_INOBT_BLOCK_LEN(mp) + \
99 ((index) - 1) * sizeof(xfs_inobt_key_t)))
100
101#define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
102 ((xfs_inobt_ptr_t *) \
103 ((char *)(block) + \
104 XFS_INOBT_BLOCK_LEN(mp) + \
105 (maxrecs) * sizeof(xfs_inobt_key_t) + \
106 ((index) - 1) * sizeof(xfs_inobt_ptr_t)))
107
108extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *,
109 struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t);
110extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
111
112#endif
113