--- /dev/null
+// 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_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,
+ 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;
+ 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);
+ }
+
+ 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,
+ 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;
+}
projects / bcachefs-tools-debian / blobdiff