minio/cmd/format-disk-cache_test.go

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/*
* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"context"
"io"
"os"
"testing"
)
// Returns format.Cache.Version
func formatCacheGetVersion(r io.ReadSeeker) (string, error) {
format := &formatCacheVersionDetect{}
if err := jsonLoad(r, format); err != nil {
return "", err
}
return format.Cache.Version, nil
}
// TestDiskCacheFormat - tests initFormatCache, formatMetaGetFormatBackendCache, formatCacheGetVersion.
func TestDiskCacheFormat(t *testing.T) {
ctx := context.Background()
fsDirs, err := getRandomDisks(1)
if err != nil {
t.Fatal(err)
}
_, err = initFormatCache(ctx, fsDirs)
if err != nil {
t.Fatal(err)
}
// Do the basic sanity checks to check if initFormatCache() did its job.
cacheFormatPath := pathJoin(fsDirs[0], minioMetaBucket, formatConfigFile)
f, err := os.OpenFile(cacheFormatPath, os.O_RDWR, 0)
if err != nil {
t.Fatal(err)
}
defer f.Close()
version, err := formatCacheGetVersion(f)
if err != nil {
t.Fatal(err)
}
if version != formatCacheVersionV1 {
t.Fatalf(`expected: %s, got: %s`, formatCacheVersionV1, version)
}
// Corrupt the format.json file and test the functions.
// formatMetaGetFormatBackendFS, formatFSGetVersion, initFormatFS should return errors.
if err = f.Truncate(0); err != nil {
t.Fatal(err)
}
if _, err = f.WriteString("b"); err != nil {
t.Fatal(err)
}
if _, err = loadAndValidateCacheFormat(context.Background(), fsDirs); err == nil {
t.Fatal("expected to fail")
}
// With unknown formatMetaV1.Version formatMetaGetFormatCache, initFormatCache should return error.
if err = f.Truncate(0); err != nil {
t.Fatal(err)
}
// Here we set formatMetaV1.Version to "2"
if _, err = f.WriteString(`{"version":"2","format":"cache","cache":{"version":"1"}}`); err != nil {
t.Fatal(err)
}
if _, err = loadAndValidateCacheFormat(context.Background(), fsDirs); err == nil {
t.Fatal("expected to fail")
}
}
// generates a valid format.json for Cache backend.
func genFormatCacheValid() []*formatCacheV1 {
disks := make([]string, 8)
formatConfigs := make([]*formatCacheV1, 8)
for index := range disks {
disks[index] = mustGetUUID()
}
for index := range disks {
format := &formatCacheV1{}
format.Version = formatMetaVersion1
format.Format = formatCache
format.Cache.Version = formatCacheVersionV1
format.Cache.This = disks[index]
format.Cache.Disks = disks
formatConfigs[index] = format
}
return formatConfigs
}
// generates a invalid format.json version for Cache backend.
func genFormatCacheInvalidVersion() []*formatCacheV1 {
disks := make([]string, 8)
formatConfigs := make([]*formatCacheV1, 8)
for index := range disks {
disks[index] = mustGetUUID()
}
for index := range disks {
format := &formatCacheV1{}
format.Version = formatMetaVersion1
format.Format = formatCache
format.Cache.Version = formatCacheVersionV1
format.Cache.This = disks[index]
format.Cache.Disks = disks
formatConfigs[index] = format
}
// Corrupt version numbers.
formatConfigs[0].Version = "2"
formatConfigs[3].Version = "-1"
return formatConfigs
}
// generates a invalid format.json version for Cache backend.
func genFormatCacheInvalidFormat() []*formatCacheV1 {
disks := make([]string, 8)
formatConfigs := make([]*formatCacheV1, 8)
for index := range disks {
disks[index] = mustGetUUID()
}
for index := range disks {
format := &formatCacheV1{}
format.Version = formatMetaVersion1
format.Format = formatCache
format.Cache.Version = formatCacheVersionV1
format.Cache.This = disks[index]
format.Cache.Disks = disks
formatConfigs[index] = format
}
// Corrupt format.
formatConfigs[0].Format = "cach"
formatConfigs[3].Format = "cach"
return formatConfigs
}
// generates a invalid format.json version for Cache backend.
func genFormatCacheInvalidCacheVersion() []*formatCacheV1 {
disks := make([]string, 8)
formatConfigs := make([]*formatCacheV1, 8)
for index := range disks {
disks[index] = mustGetUUID()
}
for index := range disks {
format := &formatCacheV1{}
format.Version = formatMetaVersion1
format.Format = formatCache
format.Cache.Version = formatCacheVersionV1
format.Cache.This = disks[index]
format.Cache.Disks = disks
formatConfigs[index] = format
}
// Corrupt version numbers.
formatConfigs[0].Cache.Version = "10"
formatConfigs[3].Cache.Version = "-1"
return formatConfigs
}
// generates a invalid format.json version for Cache backend.
func genFormatCacheInvalidDisksCount() []*formatCacheV1 {
disks := make([]string, 7)
formatConfigs := make([]*formatCacheV1, 8)
for index := range disks {
disks[index] = mustGetUUID()
}
for index := range disks {
format := &formatCacheV1{}
format.Version = formatMetaVersion1
format.Format = formatCache
format.Cache.Version = formatCacheVersionV1
format.Cache.This = disks[index]
format.Cache.Disks = disks
formatConfigs[index] = format
}
return formatConfigs
}
// generates a invalid format.json Disks for Cache backend.
func genFormatCacheInvalidDisks() []*formatCacheV1 {
disks := make([]string, 8)
formatConfigs := make([]*formatCacheV1, 8)
for index := range disks {
disks[index] = mustGetUUID()
}
for index := range disks {
format := &formatCacheV1{}
format.Version = formatMetaVersion1
format.Format = formatCache
format.Cache.Version = formatCacheVersionV1
format.Cache.This = disks[index]
format.Cache.Disks = disks
formatConfigs[index] = format
}
for index := range disks {
disks[index] = mustGetUUID()
}
// Corrupt Disks entries on disk 6 and disk 8.
formatConfigs[5].Cache.Disks = disks
formatConfigs[7].Cache.Disks = disks
return formatConfigs
}
// generates a invalid format.json This disk UUID for Cache backend.
func genFormatCacheInvalidThis() []*formatCacheV1 {
disks := make([]string, 8)
formatConfigs := make([]*formatCacheV1, 8)
for index := range disks {
disks[index] = mustGetUUID()
}
for index := range disks {
format := &formatCacheV1{}
format.Version = formatMetaVersion1
format.Format = formatCache
format.Cache.Version = formatCacheVersionV1
format.Cache.This = disks[index]
format.Cache.Disks = disks
formatConfigs[index] = format
}
// Make disk 5 and disk 8 have inconsistent disk uuid's.
formatConfigs[4].Cache.This = mustGetUUID()
formatConfigs[7].Cache.This = mustGetUUID()
return formatConfigs
}
// generates a invalid format.json Disk UUID in wrong order for Cache backend.
func genFormatCacheInvalidDisksOrder() []*formatCacheV1 {
disks := make([]string, 8)
formatConfigs := make([]*formatCacheV1, 8)
for index := range disks {
disks[index] = mustGetUUID()
}
for index := range disks {
format := &formatCacheV1{}
format.Version = formatMetaVersion1
format.Format = formatCache
format.Cache.Version = formatCacheVersionV1
format.Cache.This = disks[index]
format.Cache.Disks = disks
formatConfigs[index] = format
}
// Re order disks for failure case.
var disks1 = make([]string, 8)
copy(disks1, disks)
disks1[1], disks1[2] = disks[2], disks[1]
formatConfigs[2].Cache.Disks = disks1
return formatConfigs
}
// Wrapper for calling FormatCache tests - validates
// - valid format
// - unrecognized version number
// - unrecognized format tag
// - unrecognized cache version
// - wrong number of Disks entries
// - invalid This uuid
// - invalid Disks order
func TestFormatCache(t *testing.T) {
formatInputCases := [][]*formatCacheV1{
genFormatCacheValid(),
genFormatCacheInvalidVersion(),
genFormatCacheInvalidFormat(),
genFormatCacheInvalidCacheVersion(),
genFormatCacheInvalidDisksCount(),
genFormatCacheInvalidDisks(),
genFormatCacheInvalidThis(),
genFormatCacheInvalidDisksOrder(),
}
testCases := []struct {
formatConfigs []*formatCacheV1
shouldPass bool
}{
{
formatConfigs: formatInputCases[0],
shouldPass: true,
},
{
formatConfigs: formatInputCases[1],
shouldPass: false,
},
{
formatConfigs: formatInputCases[2],
shouldPass: false,
},
{
formatConfigs: formatInputCases[3],
shouldPass: false,
},
{
formatConfigs: formatInputCases[4],
shouldPass: false,
},
{
formatConfigs: formatInputCases[5],
shouldPass: false,
},
{
formatConfigs: formatInputCases[6],
shouldPass: false,
},
{
formatConfigs: formatInputCases[7],
shouldPass: false,
},
}
for i, testCase := range testCases {
err := validateCacheFormats(context.Background(), testCase.formatConfigs)
if err != nil && testCase.shouldPass {
t.Errorf("Test %d: Expected to pass but failed with %s", i+1, err)
}
if err == nil && !testCase.shouldPass {
t.Errorf("Test %d: Expected to fail but passed instead", i+1)
}
}
}