// 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,
enum bch_validate_flags flags, struct printbuf *err)
{
struct bch_sb_field_journal *journal = field_to_type(f, journal);
struct bch_member m = bch2_sb_member_get(sb, 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 -BCH_ERR_ENOMEM_sb_journal_validate;
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,
enum bch_validate_flags flags, struct printbuf *err)
{
struct bch_sb_field_journal_v2 *journal = field_to_type(f, journal_v2);
struct bch_member m = bch2_sb_member_get(sb, sb->dev_idx);
int ret = -BCH_ERR_invalid_sb_journal;
u64 sum = 0;
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 -BCH_ERR_ENOMEM_sb_journal_v2_validate;
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);
if (b[i].end <= b[i].start) {
prt_printf(err, "journal buckets entry with bad nr: %llu+%llu",
le64_to_cpu(journal->d[i].start),
le64_to_cpu(journal->d[i].nr));
goto err;
}
sum += 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;
}
}
if (sum > UINT_MAX) {
prt_printf(err, "too many journal buckets: %llu > %u", sum, UINT_MAX);
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,
u64 *buckets, unsigned nr)
{
struct bch_sb_field_journal_v2 *j;
unsigned i, dst = 0, nr_compacted = 1;
if (c)
lockdep_assert_held(&c->sb_lock);
if (!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 < nr; i++)
if (buckets[i] + 1 != buckets[i + 1])
nr_compacted++;
j = bch2_sb_field_resize(&ca->disk_sb, journal_v2,
(sizeof(*j) + sizeof(j->d[0]) * nr_compacted) / 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 = cpu_to_le64(buckets[0]);
j->d[dst].nr = cpu_to_le64(1);
for (i = 1; i < nr; i++) {
if (buckets[i] == buckets[i - 1] + 1) {
le64_add_cpu(&j->d[dst].nr, 1);
} else {
dst++;
j->d[dst].start = cpu_to_le64(buckets[i]);
j->d[dst].nr = cpu_to_le64(1);
}
}
BUG_ON(dst + 1 != nr_compacted);
return 0;
}
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