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
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_EC_H
#define _BCACHEFS_EC_H
#include "ec_types.h"
#include "buckets_types.h"
#include "keylist_types.h"
const char *bch2_stripe_invalid(const struct bch_fs *, struct bkey_s_c);
void bch2_stripe_to_text(struct printbuf *, struct bch_fs *,
struct bkey_s_c);
#define bch2_bkey_ops_stripe (struct bkey_ops) { \
.key_invalid = bch2_stripe_invalid, \
.val_to_text = bch2_stripe_to_text, \
.swab = bch2_ptr_swab, \
}
static inline unsigned stripe_csums_per_device(const struct bch_stripe *s)
{
return DIV_ROUND_UP(le16_to_cpu(s->sectors),
1 << s->csum_granularity_bits);
}
static inline unsigned stripe_csum_offset(const struct bch_stripe *s,
unsigned dev, unsigned csum_idx)
{
unsigned csum_bytes = bch_crc_bytes[s->csum_type];
return sizeof(struct bch_stripe) +
sizeof(struct bch_extent_ptr) * s->nr_blocks +
(dev * stripe_csums_per_device(s) + csum_idx) * csum_bytes;
}
static inline unsigned stripe_blockcount_offset(const struct bch_stripe *s,
unsigned idx)
{
return stripe_csum_offset(s, s->nr_blocks, 0) +
sizeof(u16) * idx;
}
static inline unsigned stripe_blockcount_get(const struct bch_stripe *s,
unsigned idx)
{
return le16_to_cpup((void *) s + stripe_blockcount_offset(s, idx));
}
static inline void stripe_blockcount_set(struct bch_stripe *s,
unsigned idx, unsigned v)
{
__le16 *p = (void *) s + stripe_blockcount_offset(s, idx);
*p = cpu_to_le16(v);
}
static inline unsigned stripe_val_u64s(const struct bch_stripe *s)
{
return DIV_ROUND_UP(stripe_blockcount_offset(s, s->nr_blocks),
sizeof(u64));
}
static inline void *stripe_csum(struct bch_stripe *s,
unsigned block, unsigned csum_idx)
{
EBUG_ON(block >= s->nr_blocks);
EBUG_ON(csum_idx >= stripe_csums_per_device(s));
return (void *) s + stripe_csum_offset(s, block, csum_idx);
}
static inline struct bch_csum stripe_csum_get(struct bch_stripe *s,
unsigned block, unsigned csum_idx)
{
struct bch_csum csum = { 0 };
memcpy(&csum, stripe_csum(s, block, csum_idx), bch_crc_bytes[s->csum_type]);
return csum;
}
static inline void stripe_csum_set(struct bch_stripe *s,
unsigned block, unsigned csum_idx,
struct bch_csum csum)
{
memcpy(stripe_csum(s, block, csum_idx), &csum, bch_crc_bytes[s->csum_type]);
}
static inline bool __bch2_ptr_matches_stripe(const struct bch_stripe *s,
const struct bch_extent_ptr *ptr,
unsigned block)
{
unsigned nr_data = s->nr_blocks - s->nr_redundant;
if (block >= nr_data)
return false;
return ptr->dev == s->ptrs[block].dev &&
ptr->gen == s->ptrs[block].gen &&
ptr->offset >= s->ptrs[block].offset &&
ptr->offset < s->ptrs[block].offset + le16_to_cpu(s->sectors);
}
static inline bool bch2_ptr_matches_stripe(const struct bch_stripe *s,
struct extent_ptr_decoded p)
{
BUG_ON(!p.has_ec);
return __bch2_ptr_matches_stripe(s, &p.ptr, p.ec.block);
}
struct bch_read_bio;
struct ec_stripe_buf {
/* might not be buffering the entire stripe: */
unsigned offset;
unsigned size;
unsigned long valid[BITS_TO_LONGS(BCH_BKEY_PTRS_MAX)];
void *data[BCH_BKEY_PTRS_MAX];
union {
struct bkey_i_stripe key;
u64 pad[255];
};
};
struct ec_stripe_head;
struct ec_stripe_new {
struct bch_fs *c;
struct ec_stripe_head *h;
struct mutex lock;
struct list_head list;
struct closure iodone;
/* counts in flight writes, stripe is created when pin == 0 */
atomic_t pin;
int err;
u8 nr_data;
u8 nr_parity;
bool allocated;
bool pending;
bool have_existing_stripe;
unsigned long blocks_gotten[BITS_TO_LONGS(BCH_BKEY_PTRS_MAX)];
unsigned long blocks_allocated[BITS_TO_LONGS(BCH_BKEY_PTRS_MAX)];
open_bucket_idx_t blocks[BCH_BKEY_PTRS_MAX];
struct disk_reservation res;
struct keylist keys;
u64 inline_keys[BKEY_U64s * 8];
struct ec_stripe_buf new_stripe;
struct ec_stripe_buf existing_stripe;
};
struct ec_stripe_head {
struct list_head list;
struct mutex lock;
unsigned target;
unsigned algo;
unsigned redundancy;
bool copygc;
struct bch_devs_mask devs;
unsigned nr_active_devs;
unsigned blocksize;
struct dev_stripe_state block_stripe;
struct dev_stripe_state parity_stripe;
struct ec_stripe_new *s;
};
int bch2_ec_read_extent(struct bch_fs *, struct bch_read_bio *);
void *bch2_writepoint_ec_buf(struct bch_fs *, struct write_point *);
void bch2_ec_add_backpointer(struct bch_fs *, struct write_point *,
struct bpos, unsigned);
void bch2_ec_bucket_written(struct bch_fs *, struct open_bucket *);
void bch2_ec_bucket_cancel(struct bch_fs *, struct open_bucket *);
int bch2_ec_stripe_new_alloc(struct bch_fs *, struct ec_stripe_head *);
void bch2_ec_stripe_head_put(struct bch_fs *, struct ec_stripe_head *);
struct ec_stripe_head *bch2_ec_stripe_head_get(struct bch_fs *,
unsigned, unsigned, unsigned, bool, struct closure *);
void bch2_stripes_heap_update(struct bch_fs *, struct stripe *, size_t);
void bch2_stripes_heap_del(struct bch_fs *, struct stripe *, size_t);
void bch2_stripes_heap_insert(struct bch_fs *, struct stripe *, size_t);
void bch2_ec_stop_dev(struct bch_fs *, struct bch_dev *);
void bch2_ec_flush_new_stripes(struct bch_fs *);
void bch2_stripes_heap_start(struct bch_fs *);
struct journal_keys;
int bch2_stripes_read(struct bch_fs *, struct journal_keys *);
int bch2_stripes_write(struct bch_fs *, unsigned);
int bch2_ec_mem_alloc(struct bch_fs *, bool);
void bch2_stripes_heap_to_text(struct printbuf *, struct bch_fs *);
void bch2_new_stripes_to_text(struct printbuf *, struct bch_fs *);
void bch2_fs_ec_exit(struct bch_fs *);
int bch2_fs_ec_init(struct bch_fs *);
#endif /* _BCACHEFS_EC_H */
|
