1d8a8c63db
Verify() was being called by caller after the data has been successfully read after io.EOF. This disconnection opens a race under concurrent access to such an object. Verification is not necessary outside of Read() call, we can simply just do checksum verification right inside Read() call at io.EOF. This approach simplifies the usage.
441 lines
12 KiB
Go
441 lines
12 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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"os"
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"path/filepath"
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"testing"
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"time"
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)
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// validates functionality provided to find most common
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// time occurrence from a list of time.
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func TestCommonTime(t *testing.T) {
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// List of test cases for common modTime.
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testCases := []struct {
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times []time.Time
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time time.Time
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}{
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{
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// 1. Tests common times when slice has varying time elements.
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[]time.Time{
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time.Unix(0, 1).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 1).UTC(),
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}, time.Unix(0, 3).UTC(),
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},
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{
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// 2. Tests common time obtained when all elements are equal.
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[]time.Time{
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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}, time.Unix(0, 3).UTC(),
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},
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{
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// 3. Tests common time obtained when elements have a mixture
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// of sentinel values.
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[]time.Time{
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 1).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 4).UTC(),
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time.Unix(0, 3).UTC(),
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timeSentinel,
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timeSentinel,
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timeSentinel,
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}, time.Unix(0, 3).UTC(),
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},
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}
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// Tests all the testcases, and validates them against expected
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// common modtime. Tests fail if modtime does not match.
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for i, testCase := range testCases {
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// Obtain a common mod time from modTimes slice.
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ctime, _ := commonTime(testCase.times)
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if testCase.time != ctime {
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t.Fatalf("Test case %d, expect to pass but failed. Wanted modTime: %s, got modTime: %s\n", i+1, testCase.time, ctime)
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}
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}
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}
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// partsMetaFromModTimes - returns slice of modTimes given metadata of
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// an object part.
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func partsMetaFromModTimes(modTimes []time.Time, algorithm BitrotAlgorithm, checksums []ChecksumInfo) []xlMetaV1 {
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var partsMetadata []xlMetaV1
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for _, modTime := range modTimes {
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partsMetadata = append(partsMetadata, xlMetaV1{
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Erasure: ErasureInfo{
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Checksums: checksums,
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},
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Stat: statInfo{
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ModTime: modTime,
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},
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Parts: []objectPartInfo{
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{
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Name: "part.1",
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},
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},
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})
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}
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return partsMetadata
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}
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// toPosix - fetches *posix object from StorageAPI.
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func toPosix(disk StorageAPI) *posix {
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retryDisk, ok := disk.(*retryStorage)
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if !ok {
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return nil
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}
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pDisk, ok := retryDisk.remoteStorage.(*posix)
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if !ok {
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return nil
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}
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return pDisk
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}
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// TestListOnlineDisks - checks if listOnlineDisks and outDatedDisks
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// are consistent with each other.
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func TestListOnlineDisks(t *testing.T) {
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rootPath, err := newTestConfig(globalMinioDefaultRegion)
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if err != nil {
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t.Fatalf("Failed to initialize config - %v", err)
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}
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defer os.RemoveAll(rootPath)
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obj, disks, err := prepareXL()
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if err != nil {
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t.Fatalf("Prepare XL backend failed - %v", err)
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}
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defer removeRoots(disks)
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type tamperKind int
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const (
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noTamper tamperKind = iota
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deletePart tamperKind = iota
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corruptPart tamperKind = iota
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)
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threeNanoSecs := time.Unix(0, 3).UTC()
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fourNanoSecs := time.Unix(0, 4).UTC()
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modTimesThreeNone := []time.Time{
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threeNanoSecs, threeNanoSecs, threeNanoSecs, threeNanoSecs,
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threeNanoSecs, threeNanoSecs, threeNanoSecs,
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timeSentinel, timeSentinel, timeSentinel, timeSentinel,
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timeSentinel, timeSentinel, timeSentinel, timeSentinel,
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timeSentinel,
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}
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modTimesThreeFour := []time.Time{
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threeNanoSecs, threeNanoSecs, threeNanoSecs, threeNanoSecs,
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threeNanoSecs, threeNanoSecs, threeNanoSecs, threeNanoSecs,
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fourNanoSecs, fourNanoSecs, fourNanoSecs, fourNanoSecs,
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fourNanoSecs, fourNanoSecs, fourNanoSecs, fourNanoSecs,
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}
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testCases := []struct {
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modTimes []time.Time
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expectedTime time.Time
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errs []error
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_tamperBackend tamperKind
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}{
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{
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modTimes: modTimesThreeFour,
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expectedTime: fourNanoSecs,
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errs: []error{
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nil, nil, nil, nil, nil, nil, nil, nil, nil,
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nil, nil, nil, nil, nil, nil, nil,
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},
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_tamperBackend: noTamper,
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},
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{
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modTimes: modTimesThreeNone,
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expectedTime: threeNanoSecs,
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errs: []error{
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// Disks that have a valid xl.json.
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nil, nil, nil, nil, nil, nil, nil,
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// Majority of disks don't have xl.json.
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errFileNotFound, errFileNotFound,
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errFileNotFound, errFileNotFound,
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errFileNotFound, errDiskAccessDenied,
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errDiskNotFound, errFileNotFound,
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errFileNotFound,
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},
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_tamperBackend: deletePart,
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},
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{
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modTimes: modTimesThreeNone,
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expectedTime: threeNanoSecs,
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errs: []error{
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// Disks that have a valid xl.json.
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nil, nil, nil, nil, nil, nil, nil,
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// Majority of disks don't have xl.json.
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errFileNotFound, errFileNotFound,
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errFileNotFound, errFileNotFound,
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errFileNotFound, errDiskAccessDenied,
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errDiskNotFound, errFileNotFound,
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errFileNotFound,
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},
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_tamperBackend: corruptPart,
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},
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}
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bucket := "bucket"
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object := "object"
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data := bytes.Repeat([]byte("a"), 1024)
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xlDisks := obj.(*xlObjects).storageDisks
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for i, test := range testCases {
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// Prepare bucket/object backend for the tests below.
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// Cleanup from previous test.
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obj.DeleteObject(bucket, object)
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obj.DeleteBucket(bucket)
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err = obj.MakeBucketWithLocation("bucket", "")
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if err != nil {
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t.Fatalf("Failed to make a bucket %v", err)
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}
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_, err = obj.PutObject(bucket, object, mustGetHashReader(t, bytes.NewReader(data), int64(len(data)), "", ""), nil)
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if err != nil {
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t.Fatalf("Failed to putObject %v", err)
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}
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// Fetch xl.json from first disk to construct partsMetadata for the tests.
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xlMeta, err := readXLMeta(xlDisks[0], bucket, object)
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if err != nil {
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t.Fatalf("Test %d: Failed to read xl.json %v", i+1, err)
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}
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tamperedIndex := -1
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switch test._tamperBackend {
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case deletePart:
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for index, err := range test.errs {
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if err != nil {
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continue
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}
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// Remove a part from a disk
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// which has a valid xl.json,
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// and check if that disk
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// appears in outDatedDisks.
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tamperedIndex = index
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dErr := xlDisks[index].DeleteFile(bucket, filepath.Join(object, "part.1"))
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if dErr != nil {
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t.Fatalf("Test %d: Failed to delete %s - %v", i+1,
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filepath.Join(object, "part.1"), dErr)
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}
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break
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}
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case corruptPart:
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for index, err := range test.errs {
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if err != nil {
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continue
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}
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// Corrupt a part from a disk
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// which has a valid xl.json,
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// and check if that disk
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// appears in outDatedDisks.
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tamperedIndex = index
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dErr := xlDisks[index].AppendFile(bucket, filepath.Join(object, "part.1"), []byte("corruption"))
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if dErr != nil {
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t.Fatalf("Test %d: Failed to append corrupting data at the end of file %s - %v",
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i+1, filepath.Join(object, "part.1"), dErr)
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}
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break
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}
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}
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partsMetadata := partsMetaFromModTimes(test.modTimes, DefaultBitrotAlgorithm, xlMeta.Erasure.Checksums)
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onlineDisks, modTime := listOnlineDisks(xlDisks, partsMetadata, test.errs)
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availableDisks, newErrs, _ := disksWithAllParts(onlineDisks, partsMetadata, test.errs, bucket, object)
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test.errs = newErrs
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outdatedDisks := outDatedDisks(xlDisks, availableDisks, test.errs, partsMetadata, bucket, object)
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if modTime.Equal(timeSentinel) {
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t.Fatalf("Test %d: modTime should never be equal to timeSentinel, but found equal",
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i+1)
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}
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if test._tamperBackend != noTamper {
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if tamperedIndex != -1 && outdatedDisks[tamperedIndex] == nil {
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t.Fatalf("Test %d: disk (%v) with part.1 missing is an outdated disk, but wasn't listed by outDatedDisks",
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i+1, xlDisks[tamperedIndex])
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}
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}
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if !modTime.Equal(test.expectedTime) {
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t.Fatalf("Test %d: Expected modTime to be equal to %v but was found to be %v",
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i+1, test.expectedTime, modTime)
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}
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// Check if a disk is considered both online and outdated,
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// which is a contradiction, except if parts are missing.
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overlappingDisks := make(map[string]*posix)
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for _, availableDisk := range availableDisks {
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if availableDisk == nil {
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continue
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}
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pDisk := toPosix(availableDisk)
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overlappingDisks[pDisk.diskPath] = pDisk
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}
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for index, outdatedDisk := range outdatedDisks {
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// ignore the intentionally tampered disk,
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// this is expected to appear as outdated
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// disk, since it doesn't have all the parts.
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if index == tamperedIndex {
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continue
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}
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if outdatedDisk == nil {
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continue
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}
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pDisk := toPosix(outdatedDisk)
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if _, ok := overlappingDisks[pDisk.diskPath]; ok {
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t.Errorf("Test %d: Outdated disk %v was also detected as an online disk - %v %v",
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i+1, pDisk, availableDisks, outdatedDisks)
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}
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// errors other than errFileNotFound doesn't imply that the disk is outdated.
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if test.errs[index] != nil && test.errs[index] != errFileNotFound && outdatedDisk != nil {
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t.Errorf("Test %d: error (%v) other than errFileNotFound doesn't imply that the disk (%v) could be outdated",
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i+1, test.errs[index], pDisk)
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}
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}
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}
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}
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func TestDisksWithAllParts(t *testing.T) {
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rootPath, err := newTestConfig(globalMinioDefaultRegion)
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if err != nil {
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t.Fatalf("Failed to initialize config - %v", err)
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}
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defer os.RemoveAll(rootPath)
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obj, disks, err := prepareXL()
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if err != nil {
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t.Fatalf("Prepare XL backend failed - %v", err)
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}
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defer removeRoots(disks)
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bucket := "bucket"
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object := "object"
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// make data with more than one part
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partCount := 3
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data := bytes.Repeat([]byte("a"), int(globalPutPartSize)*partCount)
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xl := obj.(*xlObjects)
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xlDisks := xl.storageDisks
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err = obj.MakeBucketWithLocation("bucket", "")
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if err != nil {
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t.Fatalf("Failed to make a bucket %v", err)
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}
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_, err = obj.PutObject(bucket, object, mustGetHashReader(t, bytes.NewReader(data), int64(len(data)), "", ""), nil)
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if err != nil {
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t.Fatalf("Failed to putObject %v", err)
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}
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partsMetadata, errs := readAllXLMetadata(xlDisks, bucket, object)
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if reducedErr := reduceReadQuorumErrs(errs, objectOpIgnoredErrs, xl.readQuorum); reducedErr != nil {
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t.Fatalf("Failed to read xl meta data %v", reducedErr)
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}
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diskFailures := make(map[int]string)
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// key = disk index, value = part name with hash mismatch
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diskFailures[0] = "part.3"
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diskFailures[3] = "part.1"
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diskFailures[15] = "part.2"
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for diskIndex, partName := range diskFailures {
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for index, info := range partsMetadata[diskIndex].Erasure.Checksums {
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if info.Name == partName {
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partsMetadata[diskIndex].Erasure.Checksums[index].Hash[0]++
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}
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}
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}
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errs = make([]error, len(xlDisks))
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filteredDisks, errs, err := disksWithAllParts(xlDisks, partsMetadata, errs, bucket, object)
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if err != nil {
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t.Errorf("Unexpected error: %s", err)
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}
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if len(filteredDisks) != len(xlDisks) {
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t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
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}
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for diskIndex, disk := range filteredDisks {
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if _, ok := diskFailures[diskIndex]; ok {
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if disk != nil {
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t.Errorf("Disk not filtered as expected, disk: %d", diskIndex)
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}
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if errs[diskIndex] == nil {
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t.Errorf("Expected error not received, diskIndex: %d", diskIndex)
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}
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} else {
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if disk == nil {
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t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
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}
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if errs[diskIndex] != nil {
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t.Errorf("Unexpected error, %s, diskIndex: %d", errs[diskIndex], diskIndex)
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}
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}
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}
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// Test that all disks are returned without any failures with unmodified
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// meta data
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partsMetadata, errs = readAllXLMetadata(xlDisks, bucket, object)
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if err != nil {
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t.Fatalf("Failed to read xl meta data %v", err)
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}
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filteredDisks, errs, err = disksWithAllParts(xlDisks, partsMetadata, errs, bucket, object)
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if err != nil {
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t.Errorf("Unexpected error: %s", err)
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}
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if len(filteredDisks) != len(xlDisks) {
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t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
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}
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for diskIndex, disk := range filteredDisks {
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if errs[diskIndex] != nil {
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t.Errorf("Unexpected error %s", errs[diskIndex])
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}
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if disk == nil {
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t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
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}
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}
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}
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