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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_SUBVOLUME_H
#define _BCACHEFS_SUBVOLUME_H
#include "darray.h"
#include "subvolume_types.h"
void bch2_snapshot_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
int bch2_snapshot_invalid(const struct bch_fs *, struct bkey_s_c,
unsigned, struct printbuf *);
#define bch2_bkey_ops_snapshot ((struct bkey_ops) { \
.key_invalid = bch2_snapshot_invalid, \
.val_to_text = bch2_snapshot_to_text, \
})
int bch2_mark_snapshot(struct btree_trans *, struct bkey_s_c,
struct bkey_s_c, unsigned);
static inline struct snapshot_t *snapshot_t(struct bch_fs *c, u32 id)
{
return genradix_ptr(&c->snapshots, U32_MAX - id);
}
static inline u32 bch2_snapshot_parent(struct bch_fs *c, u32 id)
{
return snapshot_t(c, id)->parent;
}
static inline u32 bch2_snapshot_equiv(struct bch_fs *c, u32 id)
{
return snapshot_t(c, id)->equiv;
}
static inline bool bch2_snapshot_is_equiv(struct bch_fs *c, u32 id)
{
return id == snapshot_t(c, id)->equiv;
}
static inline u32 bch2_snapshot_internal_node(struct bch_fs *c, u32 id)
{
struct snapshot_t *s = snapshot_t(c, id);
return s->children[0] || s->children[1];
}
static inline u32 bch2_snapshot_sibling(struct bch_fs *c, u32 id)
{
struct snapshot_t *s;
u32 parent = bch2_snapshot_parent(c, id);
if (!parent)
return 0;
s = snapshot_t(c, bch2_snapshot_parent(c, id));
if (id == s->children[0])
return s->children[1];
if (id == s->children[1])
return s->children[0];
return 0;
}
static inline bool bch2_snapshot_is_ancestor(struct bch_fs *c, u32 id, u32 ancestor)
{
while (id && id < ancestor)
id = bch2_snapshot_parent(c, id);
return id == ancestor;
}
static inline bool snapshot_list_has_id(snapshot_id_list *s, u32 id)
{
u32 *i;
darray_for_each(*s, i)
if (*i == id)
return true;
return false;
}
static inline bool snapshot_list_has_ancestor(struct bch_fs *c, snapshot_id_list *s, u32 id)
{
u32 *i;
darray_for_each(*s, i)
if (bch2_snapshot_is_ancestor(c, id, *i))
return true;
return false;
}
static inline int snapshot_list_add(struct bch_fs *c, snapshot_id_list *s, u32 id)
{
int ret;
BUG_ON(snapshot_list_has_id(s, id));
ret = darray_push(s, id);
if (ret)
bch_err(c, "error reallocating snapshot_id_list (size %zu)", s->size);
return ret;
}
int bch2_fs_check_snapshots(struct bch_fs *);
int bch2_fs_check_subvols(struct bch_fs *);
void bch2_fs_snapshots_exit(struct bch_fs *);
int bch2_fs_snapshots_start(struct bch_fs *);
int bch2_subvolume_invalid(const struct bch_fs *, struct bkey_s_c,
unsigned, struct printbuf *);
void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
#define bch2_bkey_ops_subvolume ((struct bkey_ops) { \
.key_invalid = bch2_subvolume_invalid, \
.val_to_text = bch2_subvolume_to_text, \
})
int bch2_subvolume_get(struct btree_trans *, unsigned,
bool, int, struct bch_subvolume *);
int bch2_snapshot_get_subvol(struct btree_trans *, u32,
struct bch_subvolume *);
int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
/* only exported for tests: */
int bch2_snapshot_node_create(struct btree_trans *, u32,
u32 *, u32 *, unsigned);
int bch2_delete_dead_snapshots(struct bch_fs *);
void bch2_delete_dead_snapshots_async(struct bch_fs *);
int bch2_subvolume_delete(struct btree_trans *, u32);
int bch2_subvolume_unlink(struct btree_trans *, u32);
int bch2_subvolume_create(struct btree_trans *, u64, u32,
u32 *, u32 *, bool);
int bch2_fs_subvolumes_init(struct bch_fs *);
#endif /* _BCACHEFS_SUBVOLUME_H */
|
