bcachefs: Fix BCH_SB_ERRS() so we can reorder

BCH_SB_ERRS() has a field for the actual enum val so that we can reorder
to reorganize, but the way BCH_SB_ERR_MAX was defined didn't allow for
this.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/bcachefs.h

@@ -776,7 +776,7 @@ struct bch_fs {
 		unsigned	nsec_per_time_unit;
 		u64		features;
 		u64		compat;
-		unsigned long	errors_silent[BITS_TO_LONGS(BCH_SB_ERR_MAX)];
+		unsigned long	errors_silent[BITS_TO_LONGS(BCH_FSCK_ERR_MAX)];
 		u64		btrees_lost_data;
 	}			sb;
 

fs/bcachefs/sb-downgrade.c

@@ -312,8 +312,7 @@ static void bch2_sb_downgrade_to_text(struct printbuf *out, struct bch_sb *sb,
 			if (!first)
 				prt_char(out, ',');
 			first = false;
-			unsigned e = le16_to_cpu(i->errors[j]);
-			prt_str(out, e < BCH_SB_ERR_MAX ? bch2_sb_error_strs[e] : "(unknown)");
+			bch2_sb_error_id_to_text(out, le16_to_cpu(i->errors[j]));
 		}
 		prt_newline(out);
 	}
@@ -401,7 +400,7 @@ void bch2_sb_set_downgrade(struct bch_fs *c, unsigned new_minor, unsigned old_mi
 
 			for (unsigned j = 0; j < le16_to_cpu(i->nr_errors); j++) {
 				unsigned e = le16_to_cpu(i->errors[j]);
-				if (e < BCH_SB_ERR_MAX)
+				if (e < BCH_FSCK_ERR_MAX)
 					__set_bit(e, c->sb.errors_silent);
 				if (e < sizeof(ext->errors_silent) * 8)
 					__set_bit_le64(e, ext->errors_silent);

fs/bcachefs/sb-errors.c

@@ -7,12 +7,12 @@
 const char * const bch2_sb_error_strs[] = {
 #define x(t, n, ...) [n] = #t,
 	BCH_SB_ERRS()
-	NULL
+#undef x
 };
 
-static void bch2_sb_error_id_to_text(struct printbuf *out, enum bch_sb_error_id id)
+void bch2_sb_error_id_to_text(struct printbuf *out, enum bch_sb_error_id id)
 {
-	if (id < BCH_SB_ERR_MAX)
+	if (id < BCH_FSCK_ERR_MAX)
 		prt_str(out, bch2_sb_error_strs[id]);
 	else
 		prt_printf(out, "(unknown error %u)", id);

fs/bcachefs/sb-errors.h

@@ -6,6 +6,8 @@
 
 extern const char * const bch2_sb_error_strs[];
 
+void bch2_sb_error_id_to_text(struct printbuf *, enum bch_sb_error_id);
+
 extern const struct bch_sb_field_ops bch_sb_field_ops_errors;
 
 void bch2_sb_error_count(struct bch_fs *, enum bch_sb_error_id);

fs/bcachefs/sb-errors_format.h

@@ -292,12 +292,12 @@ enum bch_fsck_flags {
 	x(accounting_key_replicas_nr_devs_0,			278,	FSCK_AUTOFIX)	\
 	x(accounting_key_replicas_nr_required_bad,		279,	FSCK_AUTOFIX)	\
 	x(accounting_key_replicas_devs_unsorted,		280,	FSCK_AUTOFIX)	\
+	x(MAX,							281,	0)
 
 enum bch_sb_error_id {
 #define x(t, n, ...) BCH_FSCK_ERR_##t = n,
 	BCH_SB_ERRS()
 #undef x
-	BCH_SB_ERR_MAX
 };
 
 struct bch_sb_field_errors {