1 // SPDX-License-Identifier: GPL-2.0
2
3 #include "bcachefs.h"
4 #include "journal_sb.h"
5 #include "darray.h"
6
7 #include <linux/sort.h>
8
9 /* BCH_SB_FIELD_journal: */
10
11 static int u64_cmp(const void *_l, const void *_r)
12 {
13 const u64 *l = _l;
14 const u64 *r = _r;
15
16 return cmp_int(*l, *r);
17 }
18
19 static int bch2_sb_journal_validate(struct bch_sb *sb, struct bch_sb_field *f,
20 enum bch_validate_flags flags, struct printbuf *err)
21 {
22 struct bch_sb_field_journal *journal = field_to_type(f, journal);
23 struct bch_member m = bch2_sb_member_get(sb, sb->dev_idx);
24 int ret = -BCH_ERR_invalid_sb_journal;
25 unsigned nr;
26 unsigned i;
27 u64 *b;
28
29 nr = bch2_nr_journal_buckets(journal);
30 if (!nr)
31 return 0;
32
33 b = kmalloc_array(nr, sizeof(u64), GFP_KERNEL);
34 if (!b)
35 return -BCH_ERR_ENOMEM_sb_journal_validate;
36
37 for (i = 0; i < nr; i++)
38 b[i] = le64_to_cpu(journal->buckets[i]);
39
40 sort(b, nr, sizeof(u64), u64_cmp, NULL);
41
42 if (!b[0]) {
43 prt_printf(err, "journal bucket at sector 0");
44 goto err;
45 }
46
47 if (b[0] < le16_to_cpu(m.first_bucket)) {
48 prt_printf(err, "journal bucket %llu before first bucket %u",
49 b[0], le16_to_cpu(m.first_bucket));
50 goto err;
51 }
52
53 if (b[nr - 1] >= le64_to_cpu(m.nbuckets)) {
54 prt_printf(err, "journal bucket %llu past end of device (nbuckets %llu)",
55 b[nr - 1], le64_to_cpu(m.nbuckets));
56 goto err;
57 }
58
59 for (i = 0; i + 1 < nr; i++)
60 if (b[i] == b[i + 1]) {
61 prt_printf(err, "duplicate journal buckets %llu", b[i]);
62 goto err;
63 }
64
65 ret = 0;
66 err:
67 kfree(b);
68 return ret;
69 }
70
71 static void bch2_sb_journal_to_text(struct printbuf *out, struct bch_sb *sb,
72 struct bch_sb_field *f)
73 {
74 struct bch_sb_field_journal *journal = field_to_type(f, journal);
75 unsigned i, nr = bch2_nr_journal_buckets(journal);
76
77 prt_printf(out, "Buckets: ");
78 for (i = 0; i < nr; i++)
79 prt_printf(out, " %llu", le64_to_cpu(journal->buckets[i]));
80 prt_newline(out);
81 }
82
83 const struct bch_sb_field_ops bch_sb_field_ops_journal = {
84 .validate = bch2_sb_journal_validate,
85 .to_text = bch2_sb_journal_to_text,
86 };
87
88 struct u64_range {
89 u64 start;
90 u64 end;
91 };
92
93 static int u64_range_cmp(const void *_l, const void *_r)
94 {
95 const struct u64_range *l = _l;
96 const struct u64_range *r = _r;
97
98 return cmp_int(l->start, r->start);
99 }
100
101 static int bch2_sb_journal_v2_validate(struct bch_sb *sb, struct bch_sb_field *f,
102 enum bch_validate_flags flags, struct printbuf *err)
103 {
104 struct bch_sb_field_journal_v2 *journal = field_to_type(f, journal_v2);
105 struct bch_member m = bch2_sb_member_get(sb, sb->dev_idx);
106 int ret = -BCH_ERR_invalid_sb_journal;
107 unsigned nr;
108 unsigned i;
109 struct u64_range *b;
110
111 nr = bch2_sb_field_journal_v2_nr_entries(journal);
112 if (!nr)
113 return 0;
114
115 b = kmalloc_array(nr, sizeof(*b), GFP_KERNEL);
116 if (!b)
117 return -BCH_ERR_ENOMEM_sb_journal_v2_validate;
118
119 for (i = 0; i < nr; i++) {
120 b[i].start = le64_to_cpu(journal->d[i].start);
121 b[i].end = b[i].start + le64_to_cpu(journal->d[i].nr);
122 }
123
124 sort(b, nr, sizeof(*b), u64_range_cmp, NULL);
125
126 if (!b[0].start) {
127 prt_printf(err, "journal bucket at sector 0");
128 goto err;
129 }
130
131 if (b[0].start < le16_to_cpu(m.first_bucket)) {
132 prt_printf(err, "journal bucket %llu before first bucket %u",
133 b[0].start, le16_to_cpu(m.first_bucket));
134 goto err;
135 }
136
137 if (b[nr - 1].end > le64_to_cpu(m.nbuckets)) {
138 prt_printf(err, "journal bucket %llu past end of device (nbuckets %llu)",
139 b[nr - 1].end - 1, le64_to_cpu(m.nbuckets));
140 goto err;
141 }
142
143 for (i = 0; i + 1 < nr; i++) {
144 if (b[i].end > b[i + 1].start) {
145 prt_printf(err, "duplicate journal buckets in ranges %llu-%llu, %llu-%llu",
146 b[i].start, b[i].end, b[i + 1].start, b[i + 1].end);
147 goto err;
148 }
149 }
150
151 ret = 0;
152 err:
153 kfree(b);
154 return ret;
155 }
156
157 static void bch2_sb_journal_v2_to_text(struct printbuf *out, struct bch_sb *sb,
158 struct bch_sb_field *f)
159 {
160 struct bch_sb_field_journal_v2 *journal = field_to_type(f, journal_v2);
161 unsigned i, nr = bch2_sb_field_journal_v2_nr_entries(journal);
162
163 prt_printf(out, "Buckets: ");
164 for (i = 0; i < nr; i++)
165 prt_printf(out, " %llu-%llu",
166 le64_to_cpu(journal->d[i].start),
167 le64_to_cpu(journal->d[i].start) + le64_to_cpu(journal->d[i].nr));
168 prt_newline(out);
169 }
170
171 const struct bch_sb_field_ops bch_sb_field_ops_journal_v2 = {
172 .validate = bch2_sb_journal_v2_validate,
173 .to_text = bch2_sb_journal_v2_to_text,
174 };
175
176 int bch2_journal_buckets_to_sb(struct bch_fs *c, struct bch_dev *ca,
177 u64 *buckets, unsigned nr)
178 {
179 struct bch_sb_field_journal_v2 *j;
180 unsigned i, dst = 0, nr_compacted = 1;
181
182 if (c)
183 lockdep_assert_held(&c->sb_lock);
184
185 if (!nr) {
186 bch2_sb_field_delete(&ca->disk_sb, BCH_SB_FIELD_journal);
187 bch2_sb_field_delete(&ca->disk_sb, BCH_SB_FIELD_journal_v2);
188 return 0;
189 }
190
191 for (i = 0; i + 1 < nr; i++)
192 if (buckets[i] + 1 != buckets[i + 1])
193 nr_compacted++;
194
195 j = bch2_sb_field_resize(&ca->disk_sb, journal_v2,
196 (sizeof(*j) + sizeof(j->d[0]) * nr_compacted) / sizeof(u64));
197 if (!j)
198 return -BCH_ERR_ENOSPC_sb_journal;
199
200 bch2_sb_field_delete(&ca->disk_sb, BCH_SB_FIELD_journal);
201
202 j->d[dst].start = cpu_to_le64(buckets[0]);
203 j->d[dst].nr = cpu_to_le64(1);
204
205 for (i = 1; i < nr; i++) {
206 if (buckets[i] == buckets[i - 1] + 1) {
207 le64_add_cpu(&j->d[dst].nr, 1);
208 } else {
209 dst++;
210 j->d[dst].start = cpu_to_le64(buckets[i]);
211 j->d[dst].nr = cpu_to_le64(1);
212 }
213 }
214
215 BUG_ON(dst + 1 != nr_compacted);
216 return 0;
217 }
218
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