154 lines
4 KiB
Go
154 lines
4 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 implied.
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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 donut
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import (
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"errors"
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"os"
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"path"
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"syscall"
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"io/ioutil"
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"github.com/minio/minio/pkg/iodine"
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)
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// internal disk struct
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type disk struct {
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root string
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order int
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filesystem map[string]string
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}
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// NewDisk - instantiate new disk
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func NewDisk(diskPath string, diskOrder int) (Disk, error) {
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if diskPath == "" || diskOrder < 0 {
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return nil, iodine.New(errors.New("invalid argument"), 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 nil, iodine.New(err, 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 nil, iodine.New(err, nil)
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}
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if !st.IsDir() {
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return nil, iodine.New(syscall.ENOTDIR, nil)
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}
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d := disk{
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root: diskPath,
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order: diskOrder,
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filesystem: make(map[string]string),
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}
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if fsType := d.getFSType(s.Type); fsType != "UNKNOWN" {
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d.filesystem["FSType"] = fsType
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d.filesystem["MountPoint"] = d.root
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return d, nil
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}
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return nil, iodine.New(errors.New("unsupported filesystem"), nil)
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}
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// GetPath - get root disk path
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func (d disk) GetPath() string {
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return d.root
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}
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// GetOrder - get order of disk present in graph
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func (d disk) GetOrder() int {
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return d.order
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}
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// GetFSInfo - get disk filesystem and its usage information
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func (d disk) GetFSInfo() map[string]string {
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s := syscall.Statfs_t{}
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err := syscall.Statfs(d.root, &s)
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if err != nil {
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return nil
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}
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d.filesystem["Total"] = d.formatBytes(s.Bsize * int64(s.Blocks))
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d.filesystem["Free"] = d.formatBytes(s.Bsize * int64(s.Bfree))
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return d.filesystem
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}
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// MakeDir - make a directory inside disk root path
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func (d disk) MakeDir(dirname string) error {
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return os.MkdirAll(path.Join(d.root, 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 (d disk) ListDir(dirname string) ([]os.FileInfo, error) {
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contents, err := ioutil.ReadDir(path.Join(d.root, 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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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 (d disk) ListFiles(dirname string) ([]os.FileInfo, error) {
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contents, err := ioutil.ReadDir(path.Join(d.root, 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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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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// MakeFile - create a file inside disk root path
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func (d disk) MakeFile(filename string) (*os.File, error) {
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if filename == "" {
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return nil, iodine.New(errors.New("Invalid argument"), nil)
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}
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filePath := path.Join(d.root, filename)
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// Create directories if they don't exist
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if err := os.MkdirAll(path.Dir(filePath), 0700); err != nil {
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return nil, iodine.New(err, nil)
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}
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dataFile, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE, 0600)
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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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// OpenFile - read a file inside disk root path
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func (d disk) OpenFile(filename string) (*os.File, error) {
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if filename == "" {
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return nil, iodine.New(errors.New("Invalid argument"), nil)
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}
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dataFile, err := os.Open(path.Join(d.root, 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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