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minio/cmd/naughty-disk_test.go

182 lines
4.6 KiB

/*
* 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 (
"io"
"sync"
)
// naughtyDisk wraps a POSIX disk and returns programmed errors
// specified by the developer. The purpose is to simulate errors
// that are hard to simulate in practice like DiskNotFound.
// Programmed errors are stored in errors field.
type naughtyDisk struct {
// The real disk
disk StorageAPI
// Programmed errors: API call number => error to return
errors map[int]error
// The error to return when no error value is programmed
defaultErr error
// The current API call number
callNR int
// Data protection
mu sync.Mutex
}
func newNaughtyDisk(d StorageAPI, errs map[int]error, defaultErr error) *naughtyDisk {
return &naughtyDisk{disk: d, errors: errs, defaultErr: defaultErr}
}
func (d *naughtyDisk) String() string {
return d.disk.String()
}
func (d *naughtyDisk) IsOnline() bool {
if err := d.calcError(); err != nil {
return err == errDiskNotFound
}
return d.disk.IsOnline()
}
func (d *naughtyDisk) LastError() (err error) {
return nil
}
func (d *naughtyDisk) Close() (err error) {
if err = d.calcError(); err != nil {
return err
}
return d.disk.Close()
}
func (d *naughtyDisk) calcError() (err error) {
d.mu.Lock()
defer d.mu.Unlock()
d.callNR++
if err, ok := d.errors[d.callNR]; ok {
return err
}
if d.defaultErr != nil {
return d.defaultErr
}
return nil
}
func (d *naughtyDisk) DiskInfo() (info DiskInfo, err error) {
if err := d.calcError(); err != nil {
return info, err
}
return d.disk.DiskInfo()
}
func (d *naughtyDisk) MakeVol(volume string) (err error) {
if err := d.calcError(); err != nil {
return err
}
return d.disk.MakeVol(volume)
}
func (d *naughtyDisk) ListVols() (vols []VolInfo, err error) {
if err := d.calcError(); err != nil {
return nil, err
}
return d.disk.ListVols()
}
func (d *naughtyDisk) StatVol(volume string) (volInfo VolInfo, err error) {
if err := d.calcError(); err != nil {
return VolInfo{}, err
}
return d.disk.StatVol(volume)
}
func (d *naughtyDisk) DeleteVol(volume string) (err error) {
if err := d.calcError(); err != nil {
return err
}
return d.disk.DeleteVol(volume)
}
func (d *naughtyDisk) ListDir(volume, path string, count int) (entries []string, err error) {
if err := d.calcError(); err != nil {
return []string{}, err
}
return d.disk.ListDir(volume, path, count)
}
func (d *naughtyDisk) ReadFile(volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error) {
if err := d.calcError(); err != nil {
return 0, err
}
return d.disk.ReadFile(volume, path, offset, buf, verifier)
}
func (d *naughtyDisk) ReadFileStream(volume, path string, offset, length int64) (io.ReadCloser, error) {
if err := d.calcError(); err != nil {
return nil, err
}
return d.disk.ReadFileStream(volume, path, offset, length)
}
func (d *naughtyDisk) CreateFile(volume, path string, size int64, reader io.Reader) error {
if err := d.calcError(); err != nil {
return err
}
return d.disk.CreateFile(volume, path, size, reader)
}
func (d *naughtyDisk) AppendFile(volume, path string, buf []byte) error {
if err := d.calcError(); err != nil {
return err
}
return d.disk.AppendFile(volume, path, buf)
}
func (d *naughtyDisk) RenameFile(srcVolume, srcPath, dstVolume, dstPath string) error {
if err := d.calcError(); err != nil {
return err
}
return d.disk.RenameFile(srcVolume, srcPath, dstVolume, dstPath)
}
func (d *naughtyDisk) StatFile(volume string, path string) (file FileInfo, err error) {
if err := d.calcError(); err != nil {
return FileInfo{}, err
}
return d.disk.StatFile(volume, path)
}
func (d *naughtyDisk) DeleteFile(volume string, path string) (err error) {
if err := d.calcError(); err != nil {
return err
}
return d.disk.DeleteFile(volume, path)
}
func (d *naughtyDisk) WriteAll(volume string, path string, buf []byte) (err error) {
if err := d.calcError(); err != nil {
return err
}
return d.disk.WriteAll(volume, path, buf)
}
func (d *naughtyDisk) ReadAll(volume string, path string) (buf []byte, err error) {
if err := d.calcError(); err != nil {
return nil, err
}
return d.disk.ReadAll(volume, path)
}