12f67d47f1
Under any concurrent removeObjects in progress
might have removed the parents of the same prefix
for which there is an ongoing putObject request.
An inconsistent situation may arise as explained
below even under sufficient locking.
PutObject is almost successful at the last stage when
a temporary file is renamed to its actual namespace
at `a/b/c/object1`. Concurrently a RemoveObject is
also in progress at the same prefix for an `a/b/c/object2`.
To create the object1 at location `a/b/c` PutObject has
to create all the parents recursively.
```
a/b/c - os.MkdirAll loops through has now created
'a/' and 'b/' about to create 'c/'
a/b/c/object2 - at this point 'c/' and 'object2'
are deleted about to delete b/
```
Now for os.MkdirAll loop the expected situation is
that top level parent 'a/b/' exists which it created
, such that it can create 'c/' - since removeObject
and putObject do not compete for lock due to holding
locks at different resources. removeObject proceeds
to delete parent 'b/' since 'c/' is not yet present,
once deleted 'os.MkdirAll' would receive an error as
syscall.ENOENT which would fail the putObject request.
This PR tries to address this issue by implementing
a safer/guarded approach where we would retry an operation
such as `os.MkdirAll` and `os.Rename` if both operations
observe syscall.ENOENT.
Fixes #5254
550 lines
18 KiB
Go
550 lines
18 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016, 2017 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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"bytes"
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"io"
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"io/ioutil"
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"os"
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"path"
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"testing"
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"github.com/minio/minio/pkg/errors"
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"github.com/minio/minio/pkg/lock"
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)
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func TestFSRenameFile(t *testing.T) {
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// create posix test setup
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_, path, err := newPosixTestSetup()
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if err != nil {
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t.Fatalf("Unable to create posix test setup, %s", err)
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}
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defer os.RemoveAll(path)
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if err = fsMkdir(pathJoin(path, "testvolume1")); err != nil {
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t.Fatal(err)
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}
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if err = fsRenameFile(pathJoin(path, "testvolume1"), pathJoin(path, "testvolume2")); err != nil {
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t.Fatal(err)
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}
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if err = fsRenameFile(pathJoin(path, "testvolume1"), pathJoin(path, "testvolume2")); errors.Cause(err) != errFileNotFound {
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t.Fatal(err)
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}
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if err = fsRenameFile(pathJoin(path, "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"), pathJoin(path, "testvolume2")); errors.Cause(err) != errFileNameTooLong {
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t.Fatal("Unexpected error", err)
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}
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if err = fsRenameFile(pathJoin(path, "testvolume1"), pathJoin(path, "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001")); errors.Cause(err) != errFileNameTooLong {
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t.Fatal("Unexpected error", err)
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}
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}
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func TestFSStats(t *testing.T) {
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// create posix test setup
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_, path, err := newPosixTestSetup()
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if err != nil {
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t.Fatalf("Unable to create posix test setup, %s", err)
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}
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defer os.RemoveAll(path)
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// Setup test environment.
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if err = fsMkdir(""); errors.Cause(err) != errInvalidArgument {
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t.Fatal("Unexpected error", err)
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}
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if err = fsMkdir(pathJoin(path, "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001")); errors.Cause(err) != errFileNameTooLong {
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t.Fatal("Unexpected error", err)
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}
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if err = fsMkdir(pathJoin(path, "success-vol")); err != nil {
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t.Fatalf("Unable to create volume, %s", err)
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}
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var reader = bytes.NewReader([]byte("Hello, world"))
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if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, nil, 0); err != nil {
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t.Fatalf("Unable to create file, %s", err)
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}
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// Seek back.
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reader.Seek(0, 0)
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if err = fsMkdir(pathJoin(path, "success-vol", "success-file")); errors.Cause(err) != errVolumeExists {
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t.Fatal("Unexpected error", err)
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}
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if _, err = fsCreateFile(pathJoin(path, "success-vol", "path/to/success-file"), reader, nil, 0); err != nil {
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t.Fatalf("Unable to create file, %s", err)
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}
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// Seek back.
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reader.Seek(0, 0)
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testCases := []struct {
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srcFSPath string
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srcVol string
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srcPath string
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expectedErr error
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}{
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// Test case - 1.
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// Test case with valid inputs, expected to pass.
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{
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srcFSPath: path,
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srcVol: "success-vol",
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srcPath: "success-file",
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expectedErr: nil,
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},
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// Test case - 2.
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// Test case with valid inputs, expected to pass.
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{
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srcFSPath: path,
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srcVol: "success-vol",
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srcPath: "path/to/success-file",
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expectedErr: nil,
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},
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// Test case - 3.
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// Test case with non-existent file.
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{
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srcFSPath: path,
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srcVol: "success-vol",
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srcPath: "nonexistent-file",
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expectedErr: errFileNotFound,
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},
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// Test case - 4.
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// Test case with non-existent file path.
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{
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srcFSPath: path,
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srcVol: "success-vol",
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srcPath: "path/2/success-file",
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expectedErr: errFileNotFound,
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},
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// Test case - 5.
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// Test case with path being a directory.
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{
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srcFSPath: path,
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srcVol: "success-vol",
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srcPath: "path",
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expectedErr: errFileAccessDenied,
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},
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// Test case - 6.
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// Test case with src path segment > 255.
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{
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srcFSPath: path,
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srcVol: "success-vol",
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srcPath: "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
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expectedErr: errFileNameTooLong,
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},
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// Test case - 7.
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// Test case validate only srcVol exists.
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{
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srcFSPath: path,
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srcVol: "success-vol",
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expectedErr: nil,
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},
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// Test case - 8.
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// Test case validate only srcVol doesn't exist.
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{
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srcFSPath: path,
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srcVol: "success-vol-non-existent",
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expectedErr: errVolumeNotFound,
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},
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// Test case - 9.
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// Test case validate invalid argument.
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{
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expectedErr: errInvalidArgument,
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},
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}
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for i, testCase := range testCases {
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if testCase.srcPath != "" {
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if _, err := fsStatFile(pathJoin(testCase.srcFSPath, testCase.srcVol,
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testCase.srcPath)); errors.Cause(err) != testCase.expectedErr {
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t.Fatalf("TestPosix case %d: Expected: \"%s\", got: \"%s\"", i+1, testCase.expectedErr, err)
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}
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} else {
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if _, err := fsStatVolume(pathJoin(testCase.srcFSPath, testCase.srcVol)); errors.Cause(err) != testCase.expectedErr {
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t.Fatalf("TestPosix case %d: Expected: \"%s\", got: \"%s\"", i+1, testCase.expectedErr, err)
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}
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}
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}
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}
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func TestFSCreateAndOpen(t *testing.T) {
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// Setup test environment.
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_, path, err := newPosixTestSetup()
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if err != nil {
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t.Fatalf("Unable to create posix test setup, %s", err)
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}
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defer os.RemoveAll(path)
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if err = fsMkdir(pathJoin(path, "success-vol")); err != nil {
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t.Fatalf("Unable to create directory, %s", err)
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}
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if _, err = fsCreateFile("", nil, nil, 0); errors.Cause(err) != errInvalidArgument {
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t.Fatal("Unexpected error", err)
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}
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if _, _, err = fsOpenFile("", -1); errors.Cause(err) != errInvalidArgument {
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t.Fatal("Unexpected error", err)
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}
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var reader = bytes.NewReader([]byte("Hello, world"))
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if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, nil, 0); err != nil {
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t.Fatalf("Unable to create file, %s", err)
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}
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// Seek back.
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reader.Seek(0, 0)
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testCases := []struct {
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srcVol string
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srcPath string
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expectedErr error
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}{
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// Test case - 1.
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// Test case with segment of the volume name > 255.
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{
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srcVol: "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
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srcPath: "success-file",
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expectedErr: errFileNameTooLong,
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},
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// Test case - 2.
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// Test case with src path segment > 255.
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{
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srcVol: "success-vol",
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srcPath: "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
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expectedErr: errFileNameTooLong,
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},
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}
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for i, testCase := range testCases {
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_, err = fsCreateFile(pathJoin(path, testCase.srcVol, testCase.srcPath), reader, nil, 0)
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if errors.Cause(err) != testCase.expectedErr {
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t.Errorf("Test case %d: Expected: \"%s\", got: \"%s\"", i+1, testCase.expectedErr, err)
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}
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_, _, err = fsOpenFile(pathJoin(path, testCase.srcVol, testCase.srcPath), 0)
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if errors.Cause(err) != testCase.expectedErr {
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t.Errorf("Test case %d: Expected: \"%s\", got: \"%s\"", i+1, testCase.expectedErr, err)
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}
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}
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// Attempt to open a directory.
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if _, _, err = fsOpenFile(pathJoin(path), 0); errors.Cause(err) != errIsNotRegular {
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t.Fatal("Unexpected error", err)
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}
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}
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func TestFSDeletes(t *testing.T) {
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// create posix test setup
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_, path, err := newPosixTestSetup()
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if err != nil {
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t.Fatalf("Unable to create posix test setup, %s", err)
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}
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defer os.RemoveAll(path)
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// Setup test environment.
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if err = fsMkdir(pathJoin(path, "success-vol")); err != nil {
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t.Fatalf("Unable to create directory, %s", err)
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}
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var buf = make([]byte, 4096)
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var reader = bytes.NewReader([]byte("Hello, world"))
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if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, buf, reader.Size()); err != nil {
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t.Fatalf("Unable to create file, %s", err)
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}
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// Seek back.
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reader.Seek(0, io.SeekStart)
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// folder is not empty
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err = fsMkdir(pathJoin(path, "success-vol", "not-empty"))
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if err != nil {
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t.Fatal(err)
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}
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err = ioutil.WriteFile(pathJoin(path, "success-vol", "not-empty", "file"), []byte("data"), 0777)
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if err != nil {
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t.Fatal(err)
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}
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// recursive
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if err = fsMkdir(pathJoin(path, "success-vol", "parent")); err != nil {
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t.Fatal(err)
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}
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if err = fsMkdir(pathJoin(path, "success-vol", "parent", "dir")); err != nil {
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t.Fatal(err)
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}
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testCases := []struct {
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basePath string
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srcVol string
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srcPath string
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expectedErr error
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}{
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// valid case with existing volume and file to delete.
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{
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basePath: path,
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srcVol: "success-vol",
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srcPath: "success-file",
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expectedErr: nil,
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},
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// The file was deleted in the last case, so DeleteFile should fail.
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{
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basePath: path,
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srcVol: "success-vol",
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srcPath: "success-file",
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expectedErr: errFileNotFound,
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},
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// Test case with segment of the volume name > 255.
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{
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basePath: path,
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srcVol: "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
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srcPath: "success-file",
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expectedErr: errFileNameTooLong,
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},
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// Test case with src path segment > 255.
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{
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basePath: path,
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srcVol: "success-vol",
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srcPath: "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
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expectedErr: errFileNameTooLong,
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},
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// Base path is way too long.
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{
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basePath: "path03333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333",
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srcVol: "success-vol",
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srcPath: "object",
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expectedErr: errFileNameTooLong,
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},
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// Directory is not empty. Should give nil, but won't delete.
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{
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basePath: path,
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srcVol: "success-vol",
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srcPath: "not-empty",
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expectedErr: nil,
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},
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// Should delete recursively.
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{
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basePath: path,
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srcVol: "success-vol",
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srcPath: pathJoin("parent", "dir"),
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expectedErr: nil,
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},
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}
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for i, testCase := range testCases {
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if err = fsDeleteFile(testCase.basePath, pathJoin(testCase.basePath, testCase.srcVol, testCase.srcPath)); errors.Cause(err) != testCase.expectedErr {
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t.Errorf("Test case %d: Expected: \"%s\", got: \"%s\"", i+1, testCase.expectedErr, err)
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}
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}
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}
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func BenchmarkFSDeleteFile(b *testing.B) {
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// create posix test setup
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_, path, err := newPosixTestSetup()
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if err != nil {
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b.Fatalf("Unable to create posix test setup, %s", err)
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}
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defer os.RemoveAll(path)
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// Setup test environment.
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if err = fsMkdir(pathJoin(path, "benchmark")); err != nil {
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b.Fatalf("Unable to create directory, %s", err)
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}
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benchDir := pathJoin(path, "benchmark")
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filename := pathJoin(benchDir, "file.txt")
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b.ResetTimer()
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// We need to create and delete the file sequentially inside the benchmark.
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for i := 0; i < b.N; i++ {
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b.StopTimer()
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err = ioutil.WriteFile(filename, []byte("data"), 0777)
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if err != nil {
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b.Fatal(err)
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}
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b.StartTimer()
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err = fsDeleteFile(benchDir, filename)
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if err != nil {
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b.Fatal(err)
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}
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}
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}
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// Tests fs removes.
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func TestFSRemoves(t *testing.T) {
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// create posix test setup
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_, path, err := newPosixTestSetup()
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if err != nil {
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t.Fatalf("Unable to create posix test setup, %s", err)
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}
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defer os.RemoveAll(path)
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// Setup test environment.
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if err = fsMkdir(pathJoin(path, "success-vol")); err != nil {
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t.Fatalf("Unable to create directory, %s", err)
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}
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var reader = bytes.NewReader([]byte("Hello, world"))
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if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, nil, 0); err != nil {
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t.Fatalf("Unable to create file, %s", err)
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}
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// Seek back.
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reader.Seek(0, 0)
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if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file-new"), reader, nil, 0); err != nil {
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t.Fatalf("Unable to create file, %s", err)
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}
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// Seek back.
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reader.Seek(0, 0)
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|
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testCases := []struct {
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srcFSPath string
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|
srcVol string
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srcPath string
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expectedErr error
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}{
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|
// Test case - 1.
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|
// valid case with existing volume and file to delete.
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|
{
|
|
srcFSPath: path,
|
|
srcVol: "success-vol",
|
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srcPath: "success-file",
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expectedErr: nil,
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},
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// Test case - 2.
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// The file was deleted in the last case, so DeleteFile should fail.
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|
{
|
|
srcFSPath: path,
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srcVol: "success-vol",
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|
srcPath: "success-file",
|
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expectedErr: errFileNotFound,
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},
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// Test case - 3.
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|
// Test case with segment of the volume name > 255.
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|
{
|
|
srcFSPath: path,
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|
srcVol: "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
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srcPath: "success-file",
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expectedErr: errFileNameTooLong,
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|
},
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// Test case - 4.
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|
// Test case with src path segment > 255.
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|
{
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srcFSPath: path,
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srcVol: "success-vol",
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|
srcPath: "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
|
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expectedErr: errFileNameTooLong,
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},
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// Test case - 5.
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|
// Test case with src path empty.
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|
{
|
|
srcFSPath: path,
|
|
srcVol: "success-vol",
|
|
expectedErr: errVolumeNotEmpty,
|
|
},
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|
// Test case - 6.
|
|
// Test case with src path empty.
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|
{
|
|
srcFSPath: path,
|
|
srcVol: "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
|
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expectedErr: errFileNameTooLong,
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},
|
|
// Test case - 7.
|
|
// Test case with src path empty.
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|
{
|
|
srcFSPath: path,
|
|
srcVol: "non-existent",
|
|
expectedErr: errVolumeNotFound,
|
|
},
|
|
// Test case - 8.
|
|
// Test case with src and volume path empty.
|
|
{
|
|
expectedErr: errInvalidArgument,
|
|
},
|
|
}
|
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|
|
for i, testCase := range testCases {
|
|
if testCase.srcPath != "" {
|
|
if err = fsRemoveFile(pathJoin(testCase.srcFSPath, testCase.srcVol, testCase.srcPath)); errors.Cause(err) != testCase.expectedErr {
|
|
t.Errorf("Test case %d: Expected: \"%s\", got: \"%s\"", i+1, testCase.expectedErr, err)
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}
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|
} else {
|
|
if err = fsRemoveDir(pathJoin(testCase.srcFSPath, testCase.srcVol, testCase.srcPath)); errors.Cause(err) != testCase.expectedErr {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
if err = fsRemoveAll(pathJoin(path, "success-vol")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if err = fsRemoveAll(""); errors.Cause(err) != errInvalidArgument {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if err = fsRemoveAll("my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"); errors.Cause(err) != errFileNameTooLong {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestFSRemoveMeta(t *testing.T) {
|
|
// create posix test setup
|
|
_, fsPath, err := newPosixTestSetup()
|
|
if err != nil {
|
|
t.Fatalf("Unable to create posix test setup, %s", err)
|
|
}
|
|
defer os.RemoveAll(fsPath)
|
|
|
|
// Setup test environment.
|
|
if err = fsMkdir(pathJoin(fsPath, "success-vol")); err != nil {
|
|
t.Fatalf("Unable to create directory, %s", err)
|
|
}
|
|
|
|
filePath := pathJoin(fsPath, "success-vol", "success-file")
|
|
|
|
var reader = bytes.NewReader([]byte("Hello, world"))
|
|
if _, err = fsCreateFile(filePath, reader, nil, 0); err != nil {
|
|
t.Fatalf("Unable to create file, %s", err)
|
|
}
|
|
|
|
rwPool := &fsIOPool{
|
|
readersMap: make(map[string]*lock.RLockedFile),
|
|
}
|
|
|
|
if _, err := rwPool.Open(filePath); err != nil {
|
|
t.Fatalf("Unable to lock file %s", filePath)
|
|
}
|
|
|
|
defer rwPool.Close(filePath)
|
|
|
|
tmpDir, tmpErr := ioutil.TempDir(globalTestTmpDir, "minio-")
|
|
if tmpErr != nil {
|
|
t.Fatal(tmpErr)
|
|
}
|
|
|
|
if err := fsRemoveMeta(fsPath, filePath, tmpDir); err != nil {
|
|
t.Fatalf("Unable to remove file, %s", err)
|
|
}
|
|
|
|
if _, err := os.Stat((filePath)); !os.IsNotExist(err) {
|
|
t.Fatalf("`%s` file found though it should have been deleted.", filePath)
|
|
}
|
|
|
|
if _, err := os.Stat((path.Dir(filePath))); !os.IsNotExist(err) {
|
|
t.Fatalf("`%s` parent directory found though it should have been deleted.", filePath)
|
|
}
|
|
}
|