You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 
minio/pkg/storage/donut/disk/disk.go

175 lines
4.8 KiB

/*
* Minimalist Object Storage, (C) 2015 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or impliedisk.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package disk
import (
"fmt"
"os"
"path/filepath"
"strconv"
"strings"
"syscall"
"github.com/minio/minio/pkg/iodine"
)
// Disk container for disk parameters
type Disk struct {
path string
fsInfo map[string]string
}
// New - instantiate new disk
func New(diskPath string) (Disk, error) {
if diskPath == "" {
return Disk{}, iodine.New(InvalidArgument{}, nil)
}
s := syscall.Statfs_t{}
err := syscall.Statfs(diskPath, &s)
if err != nil {
return Disk{}, iodine.New(err, nil)
}
st, err := os.Stat(diskPath)
if err != nil {
return Disk{}, iodine.New(err, nil)
}
if !st.IsDir() {
return Disk{}, iodine.New(syscall.ENOTDIR, nil)
}
disk := Disk{
path: diskPath,
fsInfo: make(map[string]string),
}
if fsType := getFSType(s.Type); fsType != "UNKNOWN" {
disk.fsInfo["FSType"] = fsType
disk.fsInfo["MountPoint"] = disk.path
return disk, nil
}
return Disk{}, iodine.New(UnsupportedFilesystem{Type: strconv.FormatInt(s.Type, 10)},
map[string]string{"Type": strconv.FormatInt(s.Type, 10)})
}
// GetPath - get root disk path
func (disk Disk) GetPath() string {
return disk.path
}
// GetFSInfo - get disk filesystem and its usage information
func (disk Disk) GetFSInfo() map[string]string {
s := syscall.Statfs_t{}
err := syscall.Statfs(disk.path, &s)
if err != nil {
return nil
}
disk.fsInfo["Total"] = formatBytes(s.Bsize * int64(s.Blocks))
disk.fsInfo["Free"] = formatBytes(s.Bsize * int64(s.Bfree))
disk.fsInfo["TotalB"] = strconv.FormatInt(s.Bsize*int64(s.Blocks), 10)
disk.fsInfo["FreeB"] = strconv.FormatInt(s.Bsize*int64(s.Bfree), 10)
return disk.fsInfo
}
// MakeDir - make a directory inside disk root path
func (disk Disk) MakeDir(dirname string) error {
return os.MkdirAll(filepath.Join(disk.path, dirname), 0700)
}
// ListDir - list a directory inside disk root path, get only directories
func (disk Disk) ListDir(dirname string) ([]os.FileInfo, error) {
dir, err := os.Open(filepath.Join(disk.path, dirname))
if err != nil {
return nil, iodine.New(err, nil)
}
contents, err := dir.Readdir(-1)
if err != nil {
return nil, iodine.New(err, nil)
}
var directories []os.FileInfo
for _, content := range contents {
// Include only directories, ignore everything else
if content.IsDir() {
directories = append(directories, content)
}
}
return directories, nil
}
// ListFiles - list a directory inside disk root path, get only files
func (disk Disk) ListFiles(dirname string) ([]os.FileInfo, error) {
dir, err := os.Open(filepath.Join(disk.path, dirname))
if err != nil {
return nil, iodine.New(err, nil)
}
contents, err := dir.Readdir(-1)
if err != nil {
return nil, iodine.New(err, nil)
}
var files []os.FileInfo
for _, content := range contents {
// Include only regular files, ignore everything else
if content.Mode().IsRegular() {
files = append(files, content)
}
}
return files, nil
}
// CreateFile - create a file inside disk root path
func (disk Disk) CreateFile(filename string) (*os.File, error) {
if filename == "" {
return nil, iodine.New(InvalidArgument{}, nil)
}
filePath := filepath.Join(disk.path, filename)
// Create directories if they don't exist
if err := os.MkdirAll(filepath.Dir(filePath), 0700); err != nil {
return nil, iodine.New(err, nil)
}
dataFile, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return nil, iodine.New(err, nil)
}
return dataFile, nil
}
// OpenFile - read a file inside disk root path
func (disk Disk) OpenFile(filename string) (*os.File, error) {
if filename == "" {
return nil, iodine.New(InvalidArgument{}, nil)
}
dataFile, err := os.Open(filepath.Join(disk.path, filename))
if err != nil {
return nil, iodine.New(err, nil)
}
return dataFile, nil
}
// formatBytes - Convert bytes to human readable string. Like a 2 MB, 64.2 KB, 52 B
func formatBytes(i int64) (result string) {
switch {
case i > (1024 * 1024 * 1024 * 1024):
result = fmt.Sprintf("%.02f TB", float64(i)/1024/1024/1024/1024)
case i > (1024 * 1024 * 1024):
result = fmt.Sprintf("%.02f GB", float64(i)/1024/1024/1024)
case i > (1024 * 1024):
result = fmt.Sprintf("%.02f MB", float64(i)/1024/1024)
case i > 1024:
result = fmt.Sprintf("%.02f KB", float64(i)/1024)
default:
result = fmt.Sprintf("%d B", i)
}
result = strings.Trim(result, " ")
return
}