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-rw-r--r--fs/bcachefs/sb-errors.c170
1 files changed, 170 insertions, 0 deletions
diff --git a/fs/bcachefs/sb-errors.c b/fs/bcachefs/sb-errors.c
new file mode 100644
index 0000000000..5f5bcae391
--- /dev/null
+++ b/fs/bcachefs/sb-errors.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "bcachefs.h"
+#include "sb-errors.h"
+#include "super-io.h"
+
+const char * const bch2_sb_error_strs[] = {
+#define x(t, n, ...) [n] = #t,
+ BCH_SB_ERRS()
+ NULL
+};
+
+static void bch2_sb_error_id_to_text(struct printbuf *out, enum bch_sb_error_id id)
+{
+ if (id < BCH_SB_ERR_MAX)
+ prt_str(out, bch2_sb_error_strs[id]);
+ else
+ prt_printf(out, "(unknown error %u)", id);
+}
+
+static inline unsigned bch2_sb_field_errors_nr_entries(struct bch_sb_field_errors *e)
+{
+ return bch2_sb_field_nr_entries(e);
+}
+
+static inline unsigned bch2_sb_field_errors_u64s(unsigned nr)
+{
+ return (sizeof(struct bch_sb_field_errors) +
+ sizeof(struct bch_sb_field_error_entry) * nr) / sizeof(u64);
+}
+
+static int bch2_sb_errors_validate(struct bch_sb *sb, struct bch_sb_field *f,
+ struct printbuf *err)
+{
+ struct bch_sb_field_errors *e = field_to_type(f, errors);
+ unsigned i, nr = bch2_sb_field_errors_nr_entries(e);
+
+ for (i = 0; i < nr; i++) {
+ if (!BCH_SB_ERROR_ENTRY_NR(&e->entries[i])) {
+ prt_printf(err, "entry with count 0 (id ");
+ bch2_sb_error_id_to_text(err, BCH_SB_ERROR_ENTRY_ID(&e->entries[i]));
+ prt_printf(err, ")");
+ return -BCH_ERR_invalid_sb_errors;
+ }
+
+ if (i + 1 < nr &&
+ BCH_SB_ERROR_ENTRY_ID(&e->entries[i]) >=
+ BCH_SB_ERROR_ENTRY_ID(&e->entries[i + 1])) {
+ prt_printf(err, "entries out of order");
+ return -BCH_ERR_invalid_sb_errors;
+ }
+ }
+
+ return 0;
+}
+
+static void bch2_sb_errors_to_text(struct printbuf *out, struct bch_sb *sb,
+ struct bch_sb_field *f)
+{
+ struct bch_sb_field_errors *e = field_to_type(f, errors);
+ unsigned i, nr = bch2_sb_field_errors_nr_entries(e);
+
+ if (out->nr_tabstops <= 1)
+ printbuf_tabstop_push(out, 16);
+
+ for (i = 0; i < nr; i++) {
+ bch2_sb_error_id_to_text(out, BCH_SB_ERROR_ENTRY_ID(&e->entries[i]));
+ prt_tab(out);
+ prt_u64(out, BCH_SB_ERROR_ENTRY_NR(&e->entries[i]));
+ prt_tab(out);
+ bch2_prt_datetime(out, le64_to_cpu(e->entries[i].last_error_time));
+ prt_newline(out);
+ }
+}
+
+const struct bch_sb_field_ops bch_sb_field_ops_errors = {
+ .validate = bch2_sb_errors_validate,
+ .to_text = bch2_sb_errors_to_text,
+};
+
+void bch2_sb_error_count(struct bch_fs *c, enum bch_sb_error_id err)
+{
+ bch_sb_errors_cpu *e = &c->fsck_error_counts;
+ struct bch_sb_error_entry_cpu n = {
+ .id = err,
+ .nr = 1,
+ .last_error_time = ktime_get_real_seconds()
+ };
+ unsigned i;
+
+ mutex_lock(&c->fsck_error_counts_lock);
+ for (i = 0; i < e->nr; i++) {
+ if (err == e->data[i].id) {
+ e->data[i].nr++;
+ e->data[i].last_error_time = n.last_error_time;
+ goto out;
+ }
+ if (err < e->data[i].id)
+ break;
+ }
+
+ if (darray_make_room(e, 1))
+ goto out;
+
+ darray_insert_item(e, i, n);
+out:
+ mutex_unlock(&c->fsck_error_counts_lock);
+}
+
+void bch2_sb_errors_from_cpu(struct bch_fs *c)
+{
+ bch_sb_errors_cpu *src = &c->fsck_error_counts;
+ struct bch_sb_field_errors *dst =
+ bch2_sb_field_resize(&c->disk_sb, errors,
+ bch2_sb_field_errors_u64s(src->nr));
+ unsigned i;
+
+ if (!dst)
+ return;
+
+ for (i = 0; i < src->nr; i++) {
+ SET_BCH_SB_ERROR_ENTRY_ID(&dst->entries[i], src->data[i].id);
+ SET_BCH_SB_ERROR_ENTRY_NR(&dst->entries[i], src->data[i].nr);
+ dst->entries[i].last_error_time = cpu_to_le64(src->data[i].last_error_time);
+ }
+}
+
+static int bch2_sb_errors_to_cpu(struct bch_fs *c)
+{
+ struct bch_sb_field_errors *src = bch2_sb_field_get(c->disk_sb.sb, errors);
+ bch_sb_errors_cpu *dst = &c->fsck_error_counts;
+ unsigned i, nr = bch2_sb_field_errors_nr_entries(src);
+ int ret;
+
+ if (!nr)
+ return 0;
+
+ mutex_lock(&c->fsck_error_counts_lock);
+ ret = darray_make_room(dst, nr);
+ if (ret)
+ goto err;
+
+ dst->nr = nr;
+
+ for (i = 0; i < nr; i++) {
+ dst->data[i].id = BCH_SB_ERROR_ENTRY_ID(&src->entries[i]);
+ dst->data[i].nr = BCH_SB_ERROR_ENTRY_NR(&src->entries[i]);
+ dst->data[i].last_error_time = le64_to_cpu(src->entries[i].last_error_time);
+ }
+err:
+ mutex_unlock(&c->fsck_error_counts_lock);
+
+ return ret;
+}
+
+void bch2_fs_sb_errors_exit(struct bch_fs *c)
+{
+ darray_exit(&c->fsck_error_counts);
+}
+
+void bch2_fs_sb_errors_init_early(struct bch_fs *c)
+{
+ mutex_init(&c->fsck_error_counts_lock);
+ darray_init(&c->fsck_error_counts);
+}
+
+int bch2_fs_sb_errors_init(struct bch_fs *c)
+{
+ return bch2_sb_errors_to_cpu(c);
+}