Add naughty disk to simulate disk errors (#2645)
Anis Elleuch
8 years ago
committed by
Harshavardhana
parent
400e9309f1
commit
421cccb1d7
@ -1,115 +0,0 @@ |
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/* |
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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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// Simulates disk returning errFaultyDisk on all methods of StorageAPI
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// interface after successCount number of successes.
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type faultyDisk struct { |
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disk *posix |
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successCount int |
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} |
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// instantiates a faulty
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func newFaultyDisk(disk *posix, n int) *faultyDisk { |
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return &faultyDisk{disk: disk, successCount: n} |
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} |
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func (f *faultyDisk) MakeVol(volume string) (err error) { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.MakeVol(volume) |
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} |
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return errFaultyDisk |
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} |
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func (f *faultyDisk) ListVols() (vols []VolInfo, err error) { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.ListVols() |
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} |
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return nil, errFaultyDisk |
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} |
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func (f *faultyDisk) StatVol(volume string) (volInfo VolInfo, err error) { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.StatVol(volume) |
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} |
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return VolInfo{}, errFaultyDisk |
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} |
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func (f *faultyDisk) DeleteVol(volume string) (err error) { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.DeleteVol(volume) |
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} |
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return errFaultyDisk |
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} |
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func (f *faultyDisk) ListDir(volume, path string) (entries []string, err error) { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.ListDir(volume, path) |
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} |
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return []string{}, errFaultyDisk |
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} |
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func (f *faultyDisk) ReadFile(volume string, path string, offset int64, buf []byte) (n int64, err error) { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.ReadFile(volume, path, offset, buf) |
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} |
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return 0, errFaultyDisk |
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} |
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func (f *faultyDisk) AppendFile(volume, path string, buf []byte) error { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.AppendFile(volume, path, buf) |
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} |
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return errFaultyDisk |
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} |
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func (f *faultyDisk) RenameFile(srcVolume, srcPath, dstVolume, dstPath string) error { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.RenameFile(srcVolume, srcPath, dstVolume, dstPath) |
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} |
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return errFaultyDisk |
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} |
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func (f *faultyDisk) StatFile(volume string, path string) (file FileInfo, err error) { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.StatFile(volume, path) |
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} |
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return FileInfo{}, errFaultyDisk |
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} |
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func (f *faultyDisk) DeleteFile(volume string, path string) (err error) { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.DeleteFile(volume, path) |
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} |
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return errFaultyDisk |
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} |
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func (f *faultyDisk) ReadAll(volume string, path string) (buf []byte, err error) { |
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if f.successCount > 0 { |
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f.successCount-- |
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return f.disk.ReadAll(volume, path) |
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} |
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return nil, errFaultyDisk |
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} |
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@ -0,0 +1,123 @@ |
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/* |
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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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// 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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} |
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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.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) 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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