242 lines
6.5 KiB
Go
242 lines
6.5 KiB
Go
/*
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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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"context"
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"io"
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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 practice 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 StorageAPI
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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 StorageAPI, 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) String() string {
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return d.disk.String()
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}
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func (d *naughtyDisk) IsOnline() bool {
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if err := d.calcError(); err != nil {
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return err == errDiskNotFound
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}
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return d.disk.IsOnline()
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}
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func (d *naughtyDisk) IsLocal() bool {
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return d.disk.IsLocal()
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}
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func (d *naughtyDisk) Hostname() string {
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return d.disk.Hostname()
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}
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func (d *naughtyDisk) Close() (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.Close()
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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) GetDiskID() (string, error) {
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return d.disk.GetDiskID()
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}
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func (d *naughtyDisk) SetDiskID(id string) {
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d.disk.SetDiskID(id)
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}
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func (d *naughtyDisk) CrawlAndGetDataUsage(ctx context.Context, cache dataUsageCache) (info dataUsageCache, err error) {
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return d.disk.CrawlAndGetDataUsage(ctx, cache)
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}
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func (d *naughtyDisk) DiskInfo() (info DiskInfo, 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) MakeVolBulk(volumes ...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.MakeVolBulk(volumes...)
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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, forceDelete bool) (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, forceDelete)
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}
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func (d *naughtyDisk) WalkSplunk(volume, path, marker string, endWalkCh <-chan struct{}) (chan FileInfo, 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.WalkSplunk(volume, path, marker, endWalkCh)
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}
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func (d *naughtyDisk) Walk(volume, path, marker string, recursive bool, leafFile string, readMetadataFn readMetadataFunc, endWalkCh <-chan struct{}) (chan FileInfo, 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.Walk(volume, path, marker, recursive, leafFile, readMetadataFn, endWalkCh)
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}
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func (d *naughtyDisk) ListDir(volume, path string, count int, leafFile 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, count, leafFile)
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}
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func (d *naughtyDisk) ReadFile(volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (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, verifier)
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}
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func (d *naughtyDisk) ReadFileStream(volume, path string, offset, length int64) (io.ReadCloser, 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.ReadFileStream(volume, path, offset, length)
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}
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func (d *naughtyDisk) CreateFile(volume, path string, size int64, reader io.Reader) 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.CreateFile(volume, path, size, reader)
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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) DeleteFileBulk(volume string, paths []string) ([]error, error) {
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errs := make([]error, len(paths))
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for idx, path := range paths {
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errs[idx] = d.disk.DeleteFile(volume, path)
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}
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return errs, nil
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}
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func (d *naughtyDisk) DeletePrefixes(volume string, paths []string) ([]error, 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.DeletePrefixes(volume, paths)
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}
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func (d *naughtyDisk) WriteAll(volume string, path string, reader io.Reader) (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.WriteAll(volume, path, reader)
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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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func (d *naughtyDisk) VerifyFile(volume, path string, size int64, algo BitrotAlgorithm, sum []byte, shardSize int64) 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.VerifyFile(volume, path, size, algo, sum, shardSize)
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}
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