rebase: update kubernetes to v1.20.0

updated kubernetes packages to latest
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/mount-utils/mount_windows.go

@@ -0,0 +1,330 @@
+// +build windows
+
+/*
+Copyright 2017 The Kubernetes Authors.
+
+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 mount
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"k8s.io/klog/v2"
+	"k8s.io/utils/keymutex"
+)
+
+const (
+	accessDenied string = "access is denied"
+)
+
+// Mounter provides the default implementation of mount.Interface
+// for the windows platform.  This implementation assumes that the
+// kubelet is running in the host's root mount namespace.
+type Mounter struct {
+	mounterPath string
+}
+
+// New returns a mount.Interface for the current system.
+// It provides options to override the default mounter behavior.
+// mounterPath allows using an alternative to `/bin/mount` for mounting.
+func New(mounterPath string) Interface {
+	return &Mounter{
+		mounterPath: mounterPath,
+	}
+}
+
+// acquire lock for smb mount
+var getSMBMountMutex = keymutex.NewHashed(0)
+
+// Mount : mounts source to target with given options.
+// currently only supports cifs(smb), bind mount(for disk)
+func (mounter *Mounter) Mount(source string, target string, fstype string, options []string) error {
+	return mounter.MountSensitive(source, target, fstype, options, nil /* sensitiveOptions */)
+}
+
+// MountSensitiveWithoutSystemd is the same as MountSensitive() but disable using ssytemd mount.
+// Windows not supported systemd mount, this function degrades to MountSensitive().
+func (mounter *Mounter) MountSensitiveWithoutSystemd(source string, target string, fstype string, options []string, sensitiveOptions []string) error {
+	return mounter.MountSensitive(source, target, fstype, options, sensitiveOptions /* sensitiveOptions */)
+}
+
+// MountSensitive is the same as Mount() but this method allows
+// sensitiveOptions to be passed in a separate parameter from the normal
+// mount options and ensures the sensitiveOptions are never logged. This
+// method should be used by callers that pass sensitive material (like
+// passwords) as mount options.
+func (mounter *Mounter) MountSensitive(source string, target string, fstype string, options []string, sensitiveOptions []string) error {
+	target = NormalizeWindowsPath(target)
+	sanitizedOptionsForLogging := sanitizedOptionsForLogging(options, sensitiveOptions)
+
+	if source == "tmpfs" {
+		klog.V(3).Infof("mounting source (%q), target (%q), with options (%q)", source, target, sanitizedOptionsForLogging)
+		return os.MkdirAll(target, 0755)
+	}
+
+	parentDir := filepath.Dir(target)
+	if err := os.MkdirAll(parentDir, 0755); err != nil {
+		return err
+	}
+
+	klog.V(4).Infof("mount options(%q) source:%q, target:%q, fstype:%q, begin to mount",
+		sanitizedOptionsForLogging, source, target, fstype)
+	bindSource := source
+
+	if bind, _, _, _ := MakeBindOptsSensitive(options, sensitiveOptions); bind {
+		bindSource = NormalizeWindowsPath(source)
+	} else {
+		allOptions := []string{}
+		allOptions = append(allOptions, options...)
+		allOptions = append(allOptions, sensitiveOptions...)
+		if len(allOptions) < 2 {
+			return fmt.Errorf("mount options(%q) should have at least 2 options, current number:%d, source:%q, target:%q",
+				sanitizedOptionsForLogging, len(allOptions), source, target)
+		}
+
+		// currently only cifs mount is supported
+		if strings.ToLower(fstype) != "cifs" {
+			return fmt.Errorf("only cifs mount is supported now, fstype: %q, mounting source (%q), target (%q), with options (%q)", fstype, source, target, sanitizedOptionsForLogging)
+		}
+
+		// lock smb mount for the same source
+		getSMBMountMutex.LockKey(source)
+		defer getSMBMountMutex.UnlockKey(source)
+
+		username := allOptions[0]
+		password := allOptions[1]
+		if output, err := newSMBMapping(username, password, source); err != nil {
+			klog.Warningf("SMB Mapping(%s) returned with error(%v), output(%s)", source, err, string(output))
+			if isSMBMappingExist(source) {
+				valid, err := isValidPath(source)
+				if !valid {
+					if err == nil || isAccessDeniedError(err) {
+						klog.V(2).Infof("SMB Mapping(%s) already exists while it's not valid, return error: %v, now begin to remove and remount", source, err)
+						if output, err = removeSMBMapping(source); err != nil {
+							return fmt.Errorf("Remove-SmbGlobalMapping failed: %v, output: %q", err, output)
+						}
+						if output, err := newSMBMapping(username, password, source); err != nil {
+							return fmt.Errorf("New-SmbGlobalMapping(%s) failed: %v, output: %q", source, err, output)
+						}
+					}
+				} else {
+					klog.V(2).Infof("SMB Mapping(%s) already exists and is still valid, skip error(%v)", source, err)
+				}
+			} else {
+				return fmt.Errorf("New-SmbGlobalMapping(%s) failed: %v, output: %q", source, err, output)
+			}
+		}
+	}
+
+	// There is an issue in golang where EvalSymlinks fails on Windows when passed a
+	// UNC share root path without a trailing backslash.
+	// Ex: \\SERVER\share will fail to resolve but \\SERVER\share\ will resolve
+	// containerD on Windows calls EvalSymlinks so we'll add the backslash when making the symlink if it is missing.
+	// https://github.com/golang/go/pull/42096 fixes this issue in golang but a fix will not be available until
+	// golang v1.16
+	mklinkSource := bindSource
+	if !strings.HasSuffix(mklinkSource, "\\") {
+		mklinkSource = mklinkSource + "\\"
+	}
+
+	output, err := exec.Command("cmd", "/c", "mklink", "/D", target, mklinkSource).CombinedOutput()
+	if err != nil {
+		klog.Errorf("mklink failed: %v, source(%q) target(%q) output: %q", err, mklinkSource, target, string(output))
+		return err
+	}
+	klog.V(2).Infof("mklink source(%q) on target(%q) successfully, output: %q", mklinkSource, target, string(output))
+
+	return nil
+}
+
+// do the SMB mount with username, password, remotepath
+// return (output, error)
+func newSMBMapping(username, password, remotepath string) (string, error) {
+	if username == "" || password == "" || remotepath == "" {
+		return "", fmt.Errorf("invalid parameter(username: %s, password: %s, remoteapth: %s)", username, sensitiveOptionsRemoved, remotepath)
+	}
+
+	// use PowerShell Environment Variables to store user input string to prevent command line injection
+	// https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_environment_variables?view=powershell-5.1
+	cmdLine := `$PWord = ConvertTo-SecureString -String $Env:smbpassword -AsPlainText -Force` +
+		`;$Credential = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $Env:smbuser, $PWord` +
+		`;New-SmbGlobalMapping -RemotePath $Env:smbremotepath -Credential $Credential`
+	cmd := exec.Command("powershell", "/c", cmdLine)
+	cmd.Env = append(os.Environ(),
+		fmt.Sprintf("smbuser=%s", username),
+		fmt.Sprintf("smbpassword=%s", password),
+		fmt.Sprintf("smbremotepath=%s", remotepath))
+
+	output, err := cmd.CombinedOutput()
+	return string(output), err
+}
+
+// check whether remotepath is already mounted
+func isSMBMappingExist(remotepath string) bool {
+	cmd := exec.Command("powershell", "/c", `Get-SmbGlobalMapping -RemotePath $Env:smbremotepath`)
+	cmd.Env = append(os.Environ(), fmt.Sprintf("smbremotepath=%s", remotepath))
+	_, err := cmd.CombinedOutput()
+	return err == nil
+}
+
+// check whether remotepath is valid
+// return (true, nil) if remotepath is valid
+func isValidPath(remotepath string) (bool, error) {
+	cmd := exec.Command("powershell", "/c", `Test-Path $Env:remoteapth`)
+	cmd.Env = append(os.Environ(), fmt.Sprintf("remoteapth=%s", remotepath))
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return false, fmt.Errorf("returned output: %s, error: %v", string(output), err)
+	}
+
+	return strings.HasPrefix(strings.ToLower(string(output)), "true"), nil
+}
+
+func isAccessDeniedError(err error) bool {
+	return err != nil && strings.Contains(strings.ToLower(err.Error()), accessDenied)
+}
+
+// remove SMB mapping
+func removeSMBMapping(remotepath string) (string, error) {
+	cmd := exec.Command("powershell", "/c", `Remove-SmbGlobalMapping -RemotePath $Env:smbremotepath -Force`)
+	cmd.Env = append(os.Environ(), fmt.Sprintf("smbremotepath=%s", remotepath))
+	output, err := cmd.CombinedOutput()
+	return string(output), err
+}
+
+// Unmount unmounts the target.
+func (mounter *Mounter) Unmount(target string) error {
+	klog.V(4).Infof("azureMount: Unmount target (%q)", target)
+	target = NormalizeWindowsPath(target)
+	if output, err := exec.Command("cmd", "/c", "rmdir", target).CombinedOutput(); err != nil {
+		klog.Errorf("rmdir failed: %v, output: %q", err, string(output))
+		return err
+	}
+	return nil
+}
+
+// List returns a list of all mounted filesystems. todo
+func (mounter *Mounter) List() ([]MountPoint, error) {
+	return []MountPoint{}, nil
+}
+
+// IsLikelyNotMountPoint determines if a directory is not a mountpoint.
+func (mounter *Mounter) IsLikelyNotMountPoint(file string) (bool, error) {
+	stat, err := os.Lstat(file)
+	if err != nil {
+		return true, err
+	}
+
+	if stat.Mode()&os.ModeSymlink != 0 {
+		return false, err
+	}
+	return true, nil
+}
+
+// GetMountRefs : empty implementation here since there is no place to query all mount points on Windows
+func (mounter *Mounter) GetMountRefs(pathname string) ([]string, error) {
+	windowsPath := NormalizeWindowsPath(pathname)
+	pathExists, pathErr := PathExists(windowsPath)
+	if !pathExists {
+		return []string{}, nil
+	} else if IsCorruptedMnt(pathErr) {
+		klog.Warningf("GetMountRefs found corrupted mount at %s, treating as unmounted path", windowsPath)
+		return []string{}, nil
+	} else if pathErr != nil {
+		return nil, fmt.Errorf("error checking path %s: %v", windowsPath, pathErr)
+	}
+	return []string{pathname}, nil
+}
+
+func (mounter *SafeFormatAndMount) formatAndMountSensitive(source string, target string, fstype string, options []string, sensitiveOptions []string) error {
+	// Try to mount the disk
+	klog.V(4).Infof("Attempting to formatAndMount disk: %s %s %s", fstype, source, target)
+
+	if err := ValidateDiskNumber(source); err != nil {
+		klog.Errorf("diskMount: formatAndMount failed, err: %v", err)
+		return err
+	}
+
+	if len(fstype) == 0 {
+		// Use 'NTFS' as the default
+		fstype = "NTFS"
+	}
+
+	// format disk if it is unformatted(raw)
+	cmd := fmt.Sprintf("Get-Disk -Number %s | Where partitionstyle -eq 'raw' | Initialize-Disk -PartitionStyle MBR -PassThru"+
+		" | New-Partition -UseMaximumSize | Format-Volume -FileSystem %s -Confirm:$false", source, fstype)
+	if output, err := mounter.Exec.Command("powershell", "/c", cmd).CombinedOutput(); err != nil {
+		return fmt.Errorf("diskMount: format disk failed, error: %v, output: %q", err, string(output))
+	}
+	klog.V(4).Infof("diskMount: Disk successfully formatted, disk: %q, fstype: %q", source, fstype)
+
+	volumeIds, err := listVolumesOnDisk(source)
+	if err != nil {
+		return err
+	}
+	driverPath := volumeIds[0]
+	target = NormalizeWindowsPath(target)
+	output, err := mounter.Exec.Command("cmd", "/c", "mklink", "/D", target, driverPath).CombinedOutput()
+	if err != nil {
+		klog.Errorf("mklink(%s, %s) failed: %v, output: %q", target, driverPath, err, string(output))
+		return err
+	}
+	klog.V(2).Infof("formatAndMount disk(%s) fstype(%s) on(%s) with output(%s) successfully", driverPath, fstype, target, string(output))
+	return nil
+}
+
+// ListVolumesOnDisk - returns back list of volumes(volumeIDs) in the disk (requested in diskID).
+func listVolumesOnDisk(diskID string) (volumeIDs []string, err error) {
+	cmd := fmt.Sprintf("(Get-Disk -DeviceId %s | Get-Partition | Get-Volume).UniqueId", diskID)
+	output, err := exec.Command("powershell", "/c", cmd).CombinedOutput()
+	klog.V(4).Infof("listVolumesOnDisk id from %s: %s", diskID, string(output))
+	if err != nil {
+		return []string{}, fmt.Errorf("error list volumes on disk. cmd: %s, output: %s, error: %v", cmd, string(output), err)
+	}
+
+	volumeIds := strings.Split(strings.TrimSpace(string(output)), "\r\n")
+	return volumeIds, nil
+}
+
+// getAllParentLinks walks all symbolic links and return all the parent targets recursively
+func getAllParentLinks(path string) ([]string, error) {
+	const maxIter = 255
+	links := []string{}
+	for {
+		links = append(links, path)
+		if len(links) > maxIter {
+			return links, fmt.Errorf("unexpected length of parent links: %v", links)
+		}
+
+		fi, err := os.Lstat(path)
+		if err != nil {
+			return links, fmt.Errorf("Lstat: %v", err)
+		}
+		if fi.Mode()&os.ModeSymlink == 0 {
+			break
+		}
+
+		path, err = os.Readlink(path)
+		if err != nil {
+			return links, fmt.Errorf("Readlink error: %v", err)
+		}
+	}
+
+	return links, nil
+}