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validator.go
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validator.go
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// Copyright 2017 CoreOS, 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 blackbox
import (
"context"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"regexp"
"strconv"
"strings"
"syscall"
"testing"
"github.com/coreos/ignition/internal/exec/util"
"github.com/coreos/ignition/tests/types"
)
func regexpSearch(itemName, pattern string, data []byte) (string, error) {
re := regexp.MustCompile(pattern)
match := re.FindSubmatch(data)
if len(match) < 2 {
return "", fmt.Errorf("couldn't find %s", itemName)
}
return string(match[1]), nil
}
func getPartitionSet(device string) (map[int]struct{}, error) {
sgdiskOverview, err := exec.Command("sgdisk", "-p", device).CombinedOutput()
if err != nil {
return nil, fmt.Errorf("sgdisk -p %s failed: %v", device, err)
}
//What this regex means: num start end size,code,name
re := regexp.MustCompile("\n\\W+(\\d+)\\W+\\d+\\W+\\d+\\W+\\d+.*")
ret := map[int]struct{}{}
for _, match := range re.FindAllStringSubmatch(string(sgdiskOverview), -1) {
if len(match) == 0 {
continue
}
if len(match) != 2 {
return nil, fmt.Errorf("Invalid regex result from parsing sgdisk")
}
num, err := strconv.Atoi(match[1])
if err != nil {
return nil, err
}
ret[num] = struct{}{}
}
return ret, nil
}
func validateDisk(t *testing.T, d types.Disk) error {
partitionSet, err := getPartitionSet(d.Device)
if err != nil {
return err
}
for _, e := range d.Partitions {
if e.TypeCode == "blank" {
continue
}
if _, ok := partitionSet[e.Number]; !ok {
t.Errorf("Partition %d is missing", e.Number)
}
delete(partitionSet, e.Number)
sgdiskInfo, err := exec.Command(
"sgdisk", "-i", strconv.Itoa(e.Number),
d.Device).CombinedOutput()
if err != nil {
t.Error("sgdisk -i", strconv.Itoa(e.Number), err)
return nil
}
actualGUID, err := regexpSearch("GUID", "Partition unique GUID: (?P<partition_guid>[\\d\\w-]+)", sgdiskInfo)
if err != nil {
return err
}
actualTypeGUID, err := regexpSearch("type GUID", "Partition GUID code: (?P<partition_code>[\\d\\w-]+)", sgdiskInfo)
if err != nil {
return err
}
actualSectors, err := regexpSearch("partition size", "Partition size: (?P<sectors>\\d+) sectors", sgdiskInfo)
if err != nil {
return err
}
actualLabel, err := regexpSearch("partition name", "Partition name: '(?P<name>[\\d\\w-_]+)'", sgdiskInfo)
if err != nil {
return err
}
// have to align the size to the nearest sector alignment boundary first
expectedSectors := types.Align(e.Length, d.Alignment)
if e.TypeGUID != "" && formatUUID(e.TypeGUID) != formatUUID(actualTypeGUID) {
t.Error("TypeGUID does not match!", e.TypeGUID, actualTypeGUID)
}
if e.GUID != "" && formatUUID(e.GUID) != formatUUID(actualGUID) {
t.Error("GUID does not match!", e.GUID, actualGUID)
}
if e.Label != actualLabel {
t.Error("Label does not match!", e.Label, actualLabel)
}
if strconv.Itoa(expectedSectors) != actualSectors {
t.Error(
"Sectors does not match!", expectedSectors, actualSectors)
}
}
if len(partitionSet) != 0 {
t.Error("Disk had extra partitions", partitionSet)
}
// TODO: inspect the disk without triggering partition rescans so we don't need to settle here
if _, err := runWithoutContext("udevadm", "settle"); err != nil {
t.Log(err)
}
return nil
}
func formatUUID(s string) string {
return strings.ToUpper(strings.Replace(s, "-", "", -1))
}
func validateFilesystems(t *testing.T, expected []*types.Partition) error {
for _, e := range expected {
if e.FilesystemType != "" {
filesystemType, err := util.FilesystemType(e.Device)
if err != nil {
return fmt.Errorf("couldn't determine filesystem type: %v", err)
}
if filesystemType != e.FilesystemType {
t.Errorf("FilesystemType does not match, expected:%q actual:%q",
e.FilesystemType, filesystemType)
}
}
if e.FilesystemUUID != "" {
filesystemUUID, err := util.FilesystemUUID(e.Device)
if err != nil {
return fmt.Errorf("couldn't determine filesystem uuid: %v", err)
}
if formatUUID(filesystemUUID) != formatUUID(e.FilesystemUUID) {
t.Errorf("FilesystemUUID does not match, expected:%q actual:%q",
e.FilesystemUUID, filesystemUUID)
}
}
if e.FilesystemLabel != "" {
filesystemLabel, err := util.FilesystemLabel(e.Device)
if err != nil {
return fmt.Errorf("couldn't determine filesystem label: %v", err)
}
if filesystemLabel != e.FilesystemLabel {
t.Errorf("FilesystemLabel does not match, expected:%q actual:%q",
e.FilesystemLabel, filesystemLabel)
}
}
}
return nil
}
func validatePartitionNodes(t *testing.T, ctx context.Context, partition *types.Partition) {
if err := mountPartition(ctx, partition); err != nil {
t.Errorf("failed to mount %s: %v", partition.Device, err)
}
defer func() {
if err := umountPartition(partition); err != nil {
// failing to unmount is not a validation failure
t.Logf("Failed to unmount %s: %v", partition.MountPath, err)
}
}()
for _, file := range partition.Files {
validateFile(t, partition, file)
}
for _, dir := range partition.Directories {
validateDirectory(t, partition, dir)
}
for _, link := range partition.Links {
validateLink(t, partition, link)
}
for _, node := range partition.RemovedNodes {
path := filepath.Join(partition.MountPath, node.Directory, node.Name)
if _, err := os.Stat(path); !os.IsNotExist(err) {
t.Error("Node was expected to be removed and is present!", path)
}
}
}
func validateFilesDirectoriesAndLinks(t *testing.T, ctx context.Context, expected []*types.Partition) {
for _, partition := range expected {
if partition.TypeCode == "blank" || partition.Length == 0 || partition.FilesystemType == "" || partition.FilesystemType == "swap" {
continue
}
validatePartitionNodes(t, ctx, partition)
}
}
func validateFile(t *testing.T, partition *types.Partition, file types.File) {
path := filepath.Join(partition.MountPath, file.Node.Directory, file.Node.Name)
fileInfo, err := os.Stat(path)
if err != nil {
t.Errorf("Error stat'ing file %s: %v", path, err)
return
}
if file.Contents != "" {
dat, err := ioutil.ReadFile(path)
if err != nil {
t.Error("Error when reading file", path)
return
}
actualContents := string(dat)
if file.Contents != actualContents {
t.Error("Contents of file", path, "do not match!",
file.Contents, actualContents)
}
}
validateMode(t, path, file.Mode)
validateNode(t, fileInfo, file.Node)
}
func validateDirectory(t *testing.T, partition *types.Partition, dir types.Directory) {
path := filepath.Join(partition.MountPath, dir.Node.Directory, dir.Node.Name)
dirInfo, err := os.Stat(path)
if err != nil {
t.Errorf("Error stat'ing directory %s: %v", path, err)
return
}
if !dirInfo.IsDir() {
t.Errorf("Node at %s is not a directory!", path)
}
validateMode(t, path, dir.Mode)
validateNode(t, dirInfo, dir.Node)
}
func validateLink(t *testing.T, partition *types.Partition, link types.Link) {
linkPath := filepath.Join(partition.MountPath, link.Node.Directory, link.Node.Name)
linkInfo, err := os.Lstat(linkPath)
if err != nil {
t.Error("Error stat'ing link \"" + linkPath + "\": " + err.Error())
return
}
if link.Hard {
targetPath := filepath.Join(partition.MountPath, link.Target)
targetInfo, err := os.Stat(targetPath)
if err != nil {
t.Error("Error stat'ing target \"" + targetPath + "\": " + err.Error())
return
}
if linkInfoSys, ok := linkInfo.Sys().(*syscall.Stat_t); ok {
if targetInfoSys, ok := targetInfo.Sys().(*syscall.Stat_t); ok {
if linkInfoSys.Ino != targetInfoSys.Ino {
t.Error("Hard link and target don't have same inode value: " + linkPath + " " + targetPath)
return
}
} else {
t.Error("Stat type assertion failed, this will only work on Linux")
return
}
} else {
t.Error("Stat type assertion failed, this will only work on Linux")
return
}
} else {
if linkInfo.Mode()&os.ModeType != os.ModeSymlink {
t.Errorf("Node at symlink path is not a symlink (it's a %s): %s", linkInfo.Mode().String(), linkPath)
return
}
targetPath, err := os.Readlink(linkPath)
if err != nil {
t.Error("Error reading symbolic link: " + err.Error())
return
}
if targetPath != link.Target {
t.Errorf("Actual and expected symbolic link targets don't match. Expected %q, got %q", link.Target, targetPath)
return
}
}
validateNode(t, linkInfo, link.Node)
}
func validateMode(t *testing.T, path string, mode int) {
if mode != 0 {
fileInfo, err := os.Stat(path)
if err != nil {
t.Error("Error running stat on node", path, err)
return
}
if fileInfo.Mode() != os.FileMode(mode) {
t.Error("Node Mode does not match", path, mode, fileInfo.Mode())
}
}
}
func validateNode(t *testing.T, nodeInfo os.FileInfo, node types.Node) {
if nodeInfoSys, ok := nodeInfo.Sys().(*syscall.Stat_t); ok {
if nodeInfoSys.Uid != uint32(node.User) {
t.Error("Node has the wrong owner", node.User, nodeInfoSys.Uid)
}
if nodeInfoSys.Gid != uint32(node.Group) {
t.Error("Node has the wrong group owner", node.Group, nodeInfoSys.Gid)
}
} else {
t.Error("Stat type assertion failed, this will only work on Linux")
return
}
}