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139 lines
3.6 KiB
139 lines
3.6 KiB
/*
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* Minio Cloud Storage, (C) 2016 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 cmd
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import (
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"github.com/minio/minio/pkg/disk"
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"sync"
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)
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// naughtyDisk wraps a POSIX disk and returns programmed errors
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// specified by the developer. The purpose is to simulate errors
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// that are hard to simulate in practise like DiskNotFound.
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// Programmed errors are stored in errors field.
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type naughtyDisk struct {
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// The real disk
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disk *posix
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// Programmed errors: API call number => error to return
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errors map[int]error
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// The error to return when no error value is programmed
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defaultErr error
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// The current API call number
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callNR int
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// Data protection
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mu sync.Mutex
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}
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func newNaughtyDisk(d *posix, errs map[int]error, defaultErr error) *naughtyDisk {
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return &naughtyDisk{disk: d, errors: errs, defaultErr: defaultErr}
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}
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func (d *naughtyDisk) calcError() (err error) {
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d.mu.Lock()
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defer d.mu.Unlock()
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d.callNR++
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if err, ok := d.errors[d.callNR]; ok {
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return err
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}
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if d.defaultErr != nil {
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return d.defaultErr
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}
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return nil
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}
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func (d *naughtyDisk) DiskInfo() (info disk.Info, err error) {
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if err := d.calcError(); err != nil {
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return info, err
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}
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return d.disk.DiskInfo()
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}
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func (d *naughtyDisk) MakeVol(volume string) (err error) {
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if err := d.calcError(); err != nil {
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return err
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}
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return d.disk.MakeVol(volume)
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}
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func (d *naughtyDisk) ListVols() (vols []VolInfo, err error) {
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if err := d.calcError(); err != nil {
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return nil, err
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}
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return d.disk.ListVols()
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}
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func (d *naughtyDisk) StatVol(volume string) (volInfo VolInfo, err error) {
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if err := d.calcError(); err != nil {
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return VolInfo{}, err
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}
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return d.disk.StatVol(volume)
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}
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func (d *naughtyDisk) DeleteVol(volume string) (err error) {
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if err := d.calcError(); err != nil {
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return err
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}
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return d.disk.DeleteVol(volume)
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}
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func (d *naughtyDisk) ListDir(volume, path string) (entries []string, err error) {
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if err := d.calcError(); err != nil {
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return []string{}, err
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}
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return d.disk.ListDir(volume, path)
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}
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func (d *naughtyDisk) ReadFile(volume string, path string, offset int64, buf []byte) (n int64, err error) {
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if err := d.calcError(); err != nil {
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return 0, err
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}
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return d.disk.ReadFile(volume, path, offset, buf)
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}
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func (d *naughtyDisk) AppendFile(volume, path string, buf []byte) error {
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if err := d.calcError(); err != nil {
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return err
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}
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return d.disk.AppendFile(volume, path, buf)
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}
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func (d *naughtyDisk) RenameFile(srcVolume, srcPath, dstVolume, dstPath string) error {
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if err := d.calcError(); err != nil {
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return err
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}
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return d.disk.RenameFile(srcVolume, srcPath, dstVolume, dstPath)
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}
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func (d *naughtyDisk) StatFile(volume string, path string) (file FileInfo, err error) {
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if err := d.calcError(); err != nil {
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return FileInfo{}, err
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}
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return d.disk.StatFile(volume, path)
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}
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func (d *naughtyDisk) DeleteFile(volume string, path string) (err error) {
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if err := d.calcError(); err != nil {
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return err
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}
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return d.disk.DeleteFile(volume, path)
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}
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func (d *naughtyDisk) ReadAll(volume string, path string) (buf []byte, err error) {
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if err := d.calcError(); err != nil {
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return nil, err
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}
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return d.disk.ReadAll(volume, path)
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}
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