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