minio/cmd/storage-interface.go

/*
 * Minio Cloud Storage, (C) 2016 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 implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cmd

import "github.com/minio/minio/pkg/disk"

// StorageAPI interface.
type StorageAPI interface {
	// Stringified version of disk.
	String() string

	// Storage operations.
	Init() (err error)
	Close() (err error)
	DiskInfo() (info disk.Info, err error)

	// Volume operations.
	MakeVol(volume string) (err error)
	ListVols() (vols []VolInfo, err error)
	StatVol(volume string) (vol VolInfo, err error)
	DeleteVol(volume string) (err error)

	// File operations.
	ListDir(volume, dirPath string) ([]string, error)
	ReadFile(volume string, path string, offset int64, buf []byte) (n int64, err error)
	ReadFileWithVerify(volume string, path string, offset int64, buf []byte,
		algo HashAlgo, expectedHash string) (n int64, err error)
	PrepareFile(volume string, path string, len int64) (err error)
	AppendFile(volume string, path string, buf []byte) (err error)
	RenameFile(srcVolume, srcPath, dstVolume, dstPath string) error
	StatFile(volume string, path string) (file FileInfo, err error)
	DeleteFile(volume string, path string) (err error)

	// Read all.
	ReadAll(volume string, path string) (buf []byte, err error)
}