1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2018-2023 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_SCRUB_BITMAP_H__
#define __XFS_SCRUB_BITMAP_H__
struct xbitmap {
struct rb_root_cached xb_root;
};
void xbitmap_init(struct xbitmap *bitmap);
void xbitmap_destroy(struct xbitmap *bitmap);
int xbitmap_clear(struct xbitmap *bitmap, uint64_t start, uint64_t len);
int xbitmap_set(struct xbitmap *bitmap, uint64_t start, uint64_t len);
int xbitmap_disunion(struct xbitmap *bitmap, struct xbitmap *sub);
uint64_t xbitmap_hweight(struct xbitmap *bitmap);
/*
* Return codes for the bitmap iterator functions are 0 to continue iterating,
* and non-zero to stop iterating. Any non-zero value will be passed up to the
* iteration caller. The special value -ECANCELED can be used to stop
* iteration, because neither bitmap iterator ever generates that error code on
* its own. Callers must not modify the bitmap while walking it.
*/
typedef int (*xbitmap_walk_fn)(uint64_t start, uint64_t len, void *priv);
int xbitmap_walk(struct xbitmap *bitmap, xbitmap_walk_fn fn,
void *priv);
bool xbitmap_empty(struct xbitmap *bitmap);
bool xbitmap_test(struct xbitmap *bitmap, uint64_t start, uint64_t *len);
/* Bitmaps, but for type-checked for xfs_agblock_t */
struct xagb_bitmap {
struct xbitmap agbitmap;
};
static inline void xagb_bitmap_init(struct xagb_bitmap *bitmap)
{
xbitmap_init(&bitmap->agbitmap);
}
static inline void xagb_bitmap_destroy(struct xagb_bitmap *bitmap)
{
xbitmap_destroy(&bitmap->agbitmap);
}
static inline int xagb_bitmap_clear(struct xagb_bitmap *bitmap,
xfs_agblock_t start, xfs_extlen_t len)
{
return xbitmap_clear(&bitmap->agbitmap, start, len);
}
static inline int xagb_bitmap_set(struct xagb_bitmap *bitmap,
xfs_agblock_t start, xfs_extlen_t len)
{
return xbitmap_set(&bitmap->agbitmap, start, len);
}
static inline bool
xagb_bitmap_test(
struct xagb_bitmap *bitmap,
xfs_agblock_t start,
xfs_extlen_t *len)
{
uint64_t biglen = *len;
bool ret;
ret = xbitmap_test(&bitmap->agbitmap, start, &biglen);
if (start + biglen >= UINT_MAX) {
ASSERT(0);
biglen = UINT_MAX - start;
}
*len = biglen;
return ret;
}
static inline int xagb_bitmap_disunion(struct xagb_bitmap *bitmap,
struct xagb_bitmap *sub)
{
return xbitmap_disunion(&bitmap->agbitmap, &sub->agbitmap);
}
static inline uint32_t xagb_bitmap_hweight(struct xagb_bitmap *bitmap)
{
return xbitmap_hweight(&bitmap->agbitmap);
}
static inline bool xagb_bitmap_empty(struct xagb_bitmap *bitmap)
{
return xbitmap_empty(&bitmap->agbitmap);
}
static inline int xagb_bitmap_walk(struct xagb_bitmap *bitmap,
xbitmap_walk_fn fn, void *priv)
{
return xbitmap_walk(&bitmap->agbitmap, fn, priv);
}
int xagb_bitmap_set_btblocks(struct xagb_bitmap *bitmap,
struct xfs_btree_cur *cur);
int xagb_bitmap_set_btcur_path(struct xagb_bitmap *bitmap,
struct xfs_btree_cur *cur);
#endif /* __XFS_SCRUB_BITMAP_H__ */
|
