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332 lines
9.3 KiB
332 lines
9.3 KiB
/*
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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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"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, 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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Checksum: 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 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, int64(len(data)), bytes.NewReader(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, xlMeta.Erasure.Checksum)
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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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