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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_SB_MEMBERS_H
#define _BCACHEFS_SB_MEMBERS_H
#include "darray.h"
extern char * const bch2_member_error_strs[];
static inline struct bch_member *
__bch2_members_v2_get_mut(struct bch_sb_field_members_v2 *mi, unsigned i)
{
return (void *) mi->_members + (i * le16_to_cpu(mi->member_bytes));
}
int bch2_sb_members_v2_init(struct bch_fs *c);
int bch2_sb_members_cpy_v2_v1(struct bch_sb_handle *disk_sb);
struct bch_member *bch2_members_v2_get_mut(struct bch_sb *sb, int i);
struct bch_member bch2_sb_member_get(struct bch_sb *sb, int i);
static inline bool bch2_dev_is_online(struct bch_dev *ca)
{
return !percpu_ref_is_zero(&ca->io_ref);
}
static inline bool bch2_dev_is_readable(struct bch_dev *ca)
{
return bch2_dev_is_online(ca) &&
ca->mi.state != BCH_MEMBER_STATE_failed;
}
static inline bool bch2_dev_get_ioref(struct bch_dev *ca, int rw)
{
if (!percpu_ref_tryget(&ca->io_ref))
return false;
if (ca->mi.state == BCH_MEMBER_STATE_rw ||
(ca->mi.state == BCH_MEMBER_STATE_ro && rw == READ))
return true;
percpu_ref_put(&ca->io_ref);
return false;
}
static inline unsigned dev_mask_nr(const struct bch_devs_mask *devs)
{
return bitmap_weight(devs->d, BCH_SB_MEMBERS_MAX);
}
static inline bool bch2_dev_list_has_dev(struct bch_devs_list devs,
unsigned dev)
{
darray_for_each(devs, i)
if (*i == dev)
return true;
return false;
}
static inline void bch2_dev_list_drop_dev(struct bch_devs_list *devs,
unsigned dev)
{
darray_for_each(*devs, i)
if (*i == dev) {
darray_remove_item(devs, i);
return;
}
}
static inline void bch2_dev_list_add_dev(struct bch_devs_list *devs,
unsigned dev)
{
if (!bch2_dev_list_has_dev(*devs, dev)) {
BUG_ON(devs->nr >= ARRAY_SIZE(devs->data));
devs->data[devs->nr++] = dev;
}
}
static inline struct bch_devs_list bch2_dev_list_single(unsigned dev)
{
return (struct bch_devs_list) { .nr = 1, .data[0] = dev };
}
static inline struct bch_dev *__bch2_next_dev_idx(struct bch_fs *c, unsigned idx,
const struct bch_devs_mask *mask)
{
struct bch_dev *ca = NULL;
while ((idx = mask
? find_next_bit(mask->d, c->sb.nr_devices, idx)
: idx) < c->sb.nr_devices &&
!(ca = rcu_dereference_check(c->devs[idx],
lockdep_is_held(&c->state_lock))))
idx++;
return ca;
}
static inline struct bch_dev *__bch2_next_dev(struct bch_fs *c, struct bch_dev *ca,
const struct bch_devs_mask *mask)
{
return __bch2_next_dev_idx(c, ca ? ca->dev_idx + 1 : 0, mask);
}
#define for_each_member_device_rcu(_c, _ca, _mask) \
for (struct bch_dev *_ca = NULL; \
(_ca = __bch2_next_dev((_c), _ca, (_mask)));)
static inline struct bch_dev *bch2_get_next_dev(struct bch_fs *c, struct bch_dev *ca)
{
if (ca)
percpu_ref_put(&ca->ref);
rcu_read_lock();
if ((ca = __bch2_next_dev(c, ca, NULL)))
percpu_ref_get(&ca->ref);
rcu_read_unlock();
return ca;
}
/*
* If you break early, you must drop your ref on the current device
*/
#define __for_each_member_device(_c, _ca) \
for (; (_ca = bch2_get_next_dev(_c, _ca));)
#define for_each_member_device(_c, _ca) \
for (struct bch_dev *_ca = NULL; \
(_ca = bch2_get_next_dev(_c, _ca));)
static inline struct bch_dev *bch2_get_next_online_dev(struct bch_fs *c,
struct bch_dev *ca,
unsigned state_mask)
{
if (ca)
percpu_ref_put(&ca->io_ref);
rcu_read_lock();
while ((ca = __bch2_next_dev(c, ca, NULL)) &&
(!((1 << ca->mi.state) & state_mask) ||
!percpu_ref_tryget(&ca->io_ref)))
;
rcu_read_unlock();
return ca;
}
#define __for_each_online_member(_c, _ca, state_mask) \
for (struct bch_dev *_ca = NULL; \
(_ca = bch2_get_next_online_dev(_c, _ca, state_mask));)
#define for_each_online_member(c, ca) \
__for_each_online_member(c, ca, ~0)
#define for_each_rw_member(c, ca) \
__for_each_online_member(c, ca, BIT(BCH_MEMBER_STATE_rw))
#define for_each_readable_member(c, ca) \
__for_each_online_member(c, ca, BIT( BCH_MEMBER_STATE_rw)|BIT(BCH_MEMBER_STATE_ro))
/*
* If a key exists that references a device, the device won't be going away and
* we can omit rcu_read_lock():
*/
static inline struct bch_dev *bch_dev_bkey_exists(const struct bch_fs *c, unsigned idx)
{
EBUG_ON(idx >= c->sb.nr_devices || !c->devs[idx]);
return rcu_dereference_check(c->devs[idx], 1);
}
static inline struct bch_dev *bch_dev_locked(struct bch_fs *c, unsigned idx)
{
EBUG_ON(idx >= c->sb.nr_devices || !c->devs[idx]);
return rcu_dereference_protected(c->devs[idx],
lockdep_is_held(&c->sb_lock) ||
lockdep_is_held(&c->state_lock));
}
/* XXX kill, move to struct bch_fs */
static inline struct bch_devs_mask bch2_online_devs(struct bch_fs *c)
{
struct bch_devs_mask devs;
memset(&devs, 0, sizeof(devs));
for_each_online_member(c, ca)
__set_bit(ca->dev_idx, devs.d);
return devs;
}
extern const struct bch_sb_field_ops bch_sb_field_ops_members_v1;
extern const struct bch_sb_field_ops bch_sb_field_ops_members_v2;
static inline bool bch2_member_exists(struct bch_member *m)
{
return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
}
static inline bool bch2_dev_exists(struct bch_sb *sb, unsigned dev)
{
if (dev < sb->nr_devices) {
struct bch_member m = bch2_sb_member_get(sb, dev);
return bch2_member_exists(&m);
}
return false;
}
static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
{
return (struct bch_member_cpu) {
.nbuckets = le64_to_cpu(mi->nbuckets),
.first_bucket = le16_to_cpu(mi->first_bucket),
.bucket_size = le16_to_cpu(mi->bucket_size),
.group = BCH_MEMBER_GROUP(mi),
.state = BCH_MEMBER_STATE(mi),
.discard = BCH_MEMBER_DISCARD(mi),
.data_allowed = BCH_MEMBER_DATA_ALLOWED(mi),
.durability = BCH_MEMBER_DURABILITY(mi)
? BCH_MEMBER_DURABILITY(mi) - 1
: 1,
.freespace_initialized = BCH_MEMBER_FREESPACE_INITIALIZED(mi),
.valid = bch2_member_exists(mi),
};
}
void bch2_sb_members_from_cpu(struct bch_fs *);
void bch2_dev_io_errors_to_text(struct printbuf *, struct bch_dev *);
void bch2_dev_errors_reset(struct bch_dev *);
#endif /* _BCACHEFS_SB_MEMBERS_H */
|
