[WIP] lint a bit, update deps

vendor/github.com/cockroachdb/pebble/vfs/disk_usage_openbsd.go

@@ -0,0 +1,26 @@
+// Copyright 2023 The LevelDB-Go and Pebble Authors. All rights reserved. Use
+// of this source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+
+//go:build openbsd
+// +build openbsd
+
+package vfs
+
+import "golang.org/x/sys/unix"
+
+func (defaultFS) GetDiskUsage(path string) (DiskUsage, error) {
+	stat := unix.Statfs_t{}
+	if err := unix.Statfs(path, &stat); err != nil {
+		return DiskUsage{}, err
+	}
+
+	freeBytes := uint64(stat.F_bsize) * uint64(stat.F_bfree)
+	availBytes := uint64(stat.F_bsize) * uint64(stat.F_bavail)
+	totalBytes := uint64(stat.F_bsize) * uint64(stat.F_blocks)
+	return DiskUsage{
+		AvailBytes: availBytes,
+		TotalBytes: totalBytes,
+		UsedBytes:  totalBytes - freeBytes,
+	}, nil
+}