//go:build linux
// +build linux

// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"). You may
// not use this file except in compliance with the License. A copy of the
// License is located at
//
//	http://aws.amazon.com/apache2.0/
//
// or in the "license" file accompanying this file. This file is distributed
// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
// express or implied. See the License for the specific language governing
// permissions and limitations under the License.

package driver

import (
	"fmt"
	"strconv"
	"strings"
)

func (d *nodeService) getBlockSizeBytes(devicePath string) (int64, error) {
	cmd := d.mounter.(*NodeMounter).Exec.Command("blockdev", "--getsize64", devicePath)
	output, err := cmd.Output()
	if err != nil {
		return -1, fmt.Errorf("error when getting size of block volume at path %s: output: %s, err: %w", devicePath, string(output), err)
	}
	strOut := strings.TrimSpace(string(output))
	gotSizeBytes, err := strconv.ParseInt(strOut, 10, 64)
	if err != nil {
		return -1, fmt.Errorf("failed to parse size %s as int", strOut)
	}
	return gotSizeBytes, nil
}