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
|
// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
#include "journal_sb.h"
#include "darray.h"
#include <linux/sort.h>
/* BCH_SB_FIELD_journal: */
static int u64_cmp(const void *_l, const void *_r)
{
const u64 *l = _l;
const u64 *r = _r;
return cmp_int(*l, *r);
}
static int bch2_sb_journal_validate(struct bch_sb *sb,
struct bch_sb_field *f,
struct printbuf *err)
{
struct bch_sb_field_journal *journal = field_to_type(f, journal);
struct bch_member *m = bch2_sb_get_members(sb)->members + sb->dev_idx;
int ret = -BCH_ERR_invalid_sb_journal;
unsigned nr;
unsigned i;
u64 *b;
nr = bch2_nr_journal_buckets(journal);
if (!nr)
return 0;
b = kmalloc_array(nr, sizeof(u64), GFP_KERNEL);
if (!b)
return -ENOMEM;
for (i = 0; i < nr; i++)
b[i] = le64_to_cpu(journal->buckets[i]);
sort(b, nr, sizeof(u64), u64_cmp, NULL);
if (!b[0]) {
prt_printf(err, "journal bucket at sector 0");
goto err;
}
if (b[0] < le16_to_cpu(m->first_bucket)) {
prt_printf(err, "journal bucket %llu before first bucket %u",
b[0], le16_to_cpu(m->first_bucket));
goto err;
}
if (b[nr - 1] >= le64_to_cpu(m->nbuckets)) {
prt_printf(err, "journal bucket %llu past end of device (nbuckets %llu)",
b[nr - 1], le64_to_cpu(m->nbuckets));
goto err;
}
for (i = 0; i + 1 < nr; i++)
if (b[i] == b[i + 1]) {
prt_printf(err, "duplicate journal buckets %llu", b[i]);
goto err;
}
ret = 0;
err:
kfree(b);
return ret;
}
static void bch2_sb_journal_to_text(struct printbuf *out, struct bch_sb *sb,
struct bch_sb_field *f)
{
struct bch_sb_field_journal *journal = field_to_type(f, journal);
unsigned i, nr = bch2_nr_journal_buckets(journal);
prt_printf(out, "Buckets: ");
for (i = 0; i < nr; i++)
prt_printf(out, " %llu", le64_to_cpu(journal->buckets[i]));
prt_newline(out);
}
const struct bch_sb_field_ops bch_sb_field_ops_journal = {
.validate = bch2_sb_journal_validate,
.to_text = bch2_sb_journal_to_text,
};
struct u64_range {
u64 start;
u64 end;
};
static int u64_range_cmp(const void *_l, const void *_r)
{
const struct u64_range *l = _l;
const struct u64_range *r = _r;
return cmp_int(l->start, r->start);
}
static int bch2_sb_journal_v2_validate(struct bch_sb *sb,
struct bch_sb_field *f,
struct printbuf *err)
{
struct bch_sb_field_journal_v2 *journal = field_to_type(f, journal_v2);
struct bch_member *m = bch2_sb_get_members(sb)->members + sb->dev_idx;
int ret = -BCH_ERR_invalid_sb_journal;
unsigned nr;
unsigned i;
struct u64_range *b;
nr = bch2_sb_field_journal_v2_nr_entries(journal);
if (!nr)
return 0;
b = kmalloc_array(nr, sizeof(*b), GFP_KERNEL);
if (!b)
return -ENOMEM;
for (i = 0; i < nr; i++) {
b[i].start = le64_to_cpu(journal->d[i].start);
b[i].end = b[i].start + le64_to_cpu(journal->d[i].nr);
}
sort(b, nr, sizeof(*b), u64_range_cmp, NULL);
if (!b[0].start) {
prt_printf(err, "journal bucket at sector 0");
goto err;
}
if (b[0].start < le16_to_cpu(m->first_bucket)) {
prt_printf(err, "journal bucket %llu before first bucket %u",
b[0].start, le16_to_cpu(m->first_bucket));
goto err;
}
if (b[nr - 1].end > le64_to_cpu(m->nbuckets)) {
prt_printf(err, "journal bucket %llu past end of device (nbuckets %llu)",
b[nr - 1].end - 1, le64_to_cpu(m->nbuckets));
goto err;
}
for (i = 0; i + 1 < nr; i++) {
if (b[i].end > b[i + 1].start) {
prt_printf(err, "duplicate journal buckets in ranges %llu-%llu, %llu-%llu",
b[i].start, b[i].end, b[i + 1].start, b[i + 1].end);
goto err;
}
}
ret = 0;
err:
kfree(b);
return ret;
}
static void bch2_sb_journal_v2_to_text(struct printbuf *out, struct bch_sb *sb,
struct bch_sb_field *f)
{
struct bch_sb_field_journal_v2 *journal = field_to_type(f, journal_v2);
unsigned i, nr = bch2_sb_field_journal_v2_nr_entries(journal);
prt_printf(out, "Buckets: ");
for (i = 0; i < nr; i++)
prt_printf(out, " %llu-%llu",
le64_to_cpu(journal->d[i].start),
le64_to_cpu(journal->d[i].start) + le64_to_cpu(journal->d[i].nr));
prt_newline(out);
}
const struct bch_sb_field_ops bch_sb_field_ops_journal_v2 = {
.validate = bch2_sb_journal_v2_validate,
.to_text = bch2_sb_journal_v2_to_text,
};
int bch2_journal_buckets_to_sb(struct bch_fs *c, struct bch_dev *ca)
{
struct journal_device *ja = &ca->journal;
struct bch_sb_field_journal_v2 *j;
unsigned i, dst = 0, nr = 1;
if (c)
lockdep_assert_held(&c->sb_lock);
if (!ja->nr) {
bch2_sb_field_delete(&ca->disk_sb, BCH_SB_FIELD_journal);
bch2_sb_field_delete(&ca->disk_sb, BCH_SB_FIELD_journal_v2);
return 0;
}
for (i = 0; i + 1 < ja->nr; i++)
if (ja->buckets[i] + 1 != ja->buckets[i + 1])
nr++;
j = bch2_sb_resize_journal_v2(&ca->disk_sb,
(sizeof(*j) + sizeof(j->d[0]) * nr) / sizeof(u64));
if (!j)
return -BCH_ERR_ENOSPC_sb_journal;
bch2_sb_field_delete(&ca->disk_sb, BCH_SB_FIELD_journal);
j->d[dst].start = le64_to_cpu(ja->buckets[0]);
j->d[dst].nr = le64_to_cpu(1);
for (i = 1; i < ja->nr; i++) {
if (ja->buckets[i] == ja->buckets[i - 1] + 1) {
le64_add_cpu(&j->d[dst].nr, 1);
} else {
dst++;
j->d[dst].start = le64_to_cpu(ja->buckets[i]);
j->d[dst].nr = le64_to_cpu(1);
}
}
BUG_ON(dst + 1 != nr);
return 0;
}
|
