Migrate to containerd v1.7.0 and update dependencies

* Updates containerd to v1.7.0 and new binary for 32-bit
Arm OSes.
* Updates Go dependencies - openfaas and external

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

vendor/github.com/moby/sys/mountinfo/mounted_linux.go

@@ -7,6 +7,34 @@ import (
 	"golang.org/x/sys/unix"
 )
 
+// MountedFast is a method of detecting a mount point without reading
+// mountinfo from procfs. A caller can only trust the result if no error
+// and sure == true are returned. Otherwise, other methods (e.g. parsing
+// /proc/mounts) have to be used. If unsure, use Mounted instead (which
+// uses MountedFast, but falls back to parsing mountinfo if needed).
+//
+// If a non-existent path is specified, an appropriate error is returned.
+// In case the caller is not interested in this particular error, it should
+// be handled separately using e.g. errors.Is(err, fs.ErrNotExist).
+//
+// This function is only available on Linux. When available (since kernel
+// v5.6), openat2(2) syscall is used to reliably detect all mounts. Otherwise,
+// the implementation falls back to using stat(2), which can reliably detect
+// normal (but not bind) mounts.
+func MountedFast(path string) (mounted, sure bool, err error) {
+	// Root is always mounted.
+	if path == string(os.PathSeparator) {
+		return true, true, nil
+	}
+
+	path, err = normalizePath(path)
+	if err != nil {
+		return false, false, err
+	}
+	mounted, sure, err = mountedFast(path)
+	return
+}
+
 // mountedByOpenat2 is a method of detecting a mount that works for all kinds
 // of mounts (incl. bind mounts), but requires a recent (v5.6+) linux kernel.
 func mountedByOpenat2(path string) (bool, error) {
@@ -34,24 +62,40 @@ func mountedByOpenat2(path string) (bool, error) {
 	return false, &os.PathError{Op: "openat2", Path: path, Err: err}
 }
 
-func mounted(path string) (bool, error) {
-	path, err := normalizePath(path)
-	if err != nil {
-		return false, err
+// mountedFast is similar to MountedFast, except it expects a normalized path.
+func mountedFast(path string) (mounted, sure bool, err error) {
+	// Root is always mounted.
+	if path == string(os.PathSeparator) {
+		return true, true, nil
 	}
+
 	// Try a fast path, using openat2() with RESOLVE_NO_XDEV.
-	mounted, err := mountedByOpenat2(path)
+	mounted, err = mountedByOpenat2(path)
 	if err == nil {
-		return mounted, nil
+		return mounted, true, nil
 	}
+
 	// Another fast path: compare st.st_dev fields.
 	mounted, err = mountedByStat(path)
 	// This does not work for bind mounts, so false negative
 	// is possible, therefore only trust if return is true.
 	if mounted && err == nil {
+		return true, true, nil
+	}
+
+	return
+}
+
+func mounted(path string) (bool, error) {
+	path, err := normalizePath(path)
+	if err != nil {
+		return false, err
+	}
+	mounted, sure, err := mountedFast(path)
+	if sure && err == nil {
 		return mounted, nil
 	}
 
-	// Fallback to parsing mountinfo
+	// Fallback to parsing mountinfo.
 	return mountedByMountinfo(path)
 }

vendor/github.com/moby/sys/mountinfo/mounted_unix.go

@@ -1,10 +1,9 @@
-//go:build linux || (freebsd && cgo) || (openbsd && cgo) || (darwin && cgo)
-// +build linux freebsd,cgo openbsd,cgo darwin,cgo
+//go:build linux || freebsd || openbsd || darwin
+// +build linux freebsd openbsd darwin
 
 package mountinfo
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
 
@@ -33,13 +32,13 @@ func mountedByStat(path string) (bool, error) {
 
 func normalizePath(path string) (realPath string, err error) {
 	if realPath, err = filepath.Abs(path); err != nil {
-		return "", fmt.Errorf("unable to get absolute path for %q: %w", path, err)
+		return "", err
 	}
 	if realPath, err = filepath.EvalSymlinks(realPath); err != nil {
-		return "", fmt.Errorf("failed to canonicalise path for %q: %w", path, err)
+		return "", err
 	}
 	if _, err := os.Stat(realPath); err != nil {
-		return "", fmt.Errorf("failed to stat target of %q: %w", path, err)
+		return "", err
 	}
 	return realPath, nil
 }

vendor/github.com/moby/sys/mountinfo/mountinfo.go

@@ -13,9 +13,9 @@ func GetMounts(f FilterFunc) ([]*Info, error) {
 // Mounted determines if a specified path is a mount point. In case of any
 // error, false (and an error) is returned.
 //
-// The non-existent path returns an error. If a caller is not interested
-// in this particular error, it should handle it separately using e.g.
-// errors.Is(err, os.ErrNotExist).
+// If a non-existent path is specified, an appropriate error is returned.
+// In case the caller is not interested in this particular error, it should
+// be handled separately using e.g. errors.Is(err, fs.ErrNotExist).
 func Mounted(path string) (bool, error) {
 	// root is always mounted
 	if path == string(os.PathSeparator) {

vendor/github.com/moby/sys/mountinfo/mountinfo_bsd.go

@@ -1,53 +1,37 @@
-//go:build (freebsd && cgo) || (openbsd && cgo) || (darwin && cgo)
-// +build freebsd,cgo openbsd,cgo darwin,cgo
+//go:build freebsd || openbsd || darwin
+// +build freebsd openbsd darwin
 
 package mountinfo
 
-/*
-#include <sys/param.h>
-#include <sys/ucred.h>
-#include <sys/mount.h>
-*/
-import "C"
-
-import (
-	"fmt"
-	"reflect"
-	"unsafe"
-)
+import "golang.org/x/sys/unix"
 
 // parseMountTable returns information about mounted filesystems
 func parseMountTable(filter FilterFunc) ([]*Info, error) {
-	var rawEntries *C.struct_statfs
-
-	count := int(C.getmntinfo(&rawEntries, C.MNT_WAIT))
-	if count == 0 {
-		return nil, fmt.Errorf("failed to call getmntinfo")
+	count, err := unix.Getfsstat(nil, unix.MNT_WAIT)
+	if err != nil {
+		return nil, err
 	}
 
-	var entries []C.struct_statfs
-	header := (*reflect.SliceHeader)(unsafe.Pointer(&entries))
-	header.Cap = count
-	header.Len = count
-	header.Data = uintptr(unsafe.Pointer(rawEntries))
+	entries := make([]unix.Statfs_t, count)
+	_, err = unix.Getfsstat(entries, unix.MNT_WAIT)
+	if err != nil {
+		return nil, err
+	}
 
 	var out []*Info
 	for _, entry := range entries {
-		var mountinfo Info
 		var skip, stop bool
-		mountinfo.Mountpoint = C.GoString(&entry.f_mntonname[0])
-		mountinfo.FSType = C.GoString(&entry.f_fstypename[0])
-		mountinfo.Source = C.GoString(&entry.f_mntfromname[0])
+		mountinfo := getMountinfo(&entry)
 
 		if filter != nil {
 			// filter out entries we're not interested in
-			skip, stop = filter(&mountinfo)
+			skip, stop = filter(mountinfo)
 			if skip {
 				continue
 			}
 		}
 
-		out = append(out, &mountinfo)
+		out = append(out, mountinfo)
 		if stop {
 			break
 		}

vendor/github.com/moby/sys/mountinfo/mountinfo_freebsdlike.go

@@ -0,0 +1,14 @@
+//go:build freebsd || darwin
+// +build freebsd darwin
+
+package mountinfo
+
+import "golang.org/x/sys/unix"
+
+func getMountinfo(entry *unix.Statfs_t) *Info {
+	return &Info{
+		Mountpoint: unix.ByteSliceToString(entry.Mntonname[:]),
+		FSType:     unix.ByteSliceToString(entry.Fstypename[:]),
+		Source:     unix.ByteSliceToString(entry.Mntfromname[:]),
+	}
+}

vendor/github.com/moby/sys/mountinfo/mountinfo_openbsd.go

@@ -0,0 +1,11 @@
+package mountinfo
+
+import "golang.org/x/sys/unix"
+
+func getMountinfo(entry *unix.Statfs_t) *Info {
+	return &Info{
+		Mountpoint: unix.ByteSliceToString(entry.F_mntonname[:]),
+		FSType:     unix.ByteSliceToString(entry.F_fstypename[:]),
+		Source:     unix.ByteSliceToString(entry.F_mntfromname[:]),
+	}
+}

vendor/github.com/moby/sys/mountinfo/mountinfo_unsupported.go

@@ -1,5 +1,5 @@
-//go:build (!windows && !linux && !freebsd && !openbsd && !darwin) || (freebsd && !cgo) || (openbsd && !cgo) || (darwin && !cgo)
-// +build !windows,!linux,!freebsd,!openbsd,!darwin freebsd,!cgo openbsd,!cgo darwin,!cgo
+//go:build !windows && !linux && !freebsd && !openbsd && !darwin
+// +build !windows,!linux,!freebsd,!openbsd,!darwin
 
 package mountinfo
 

vendor/github.com/moby/sys/sequential/LICENSE

@@ -0,0 +1,202 @@
+
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vendor/github.com/moby/sys/sequential/doc.go

@@ -0,0 +1,15 @@
+// Package sequential provides a set of functions for managing sequential
+// files on Windows.
+//
+// The origin of these functions are the golang OS and windows packages,
+// slightly modified to only cope with files, not directories due to the
+// specific use case.
+//
+// The alteration is to allow a file on Windows to be opened with
+// FILE_FLAG_SEQUENTIAL_SCAN (particular for docker load), to avoid eating
+// the standby list, particularly when accessing large files such as layer.tar.
+//
+// For non-Windows platforms, the package provides wrappers for the equivalents
+// in the os packages. They are passthrough on Unix platforms, and only relevant
+// on Windows.
+package sequential

vendor/github.com/moby/sys/sequential/sequential_unix.go

@@ -0,0 +1,45 @@
+//go:build !windows
+// +build !windows
+
+package sequential
+
+import "os"
+
+// Create creates the named file with mode 0666 (before umask), truncating
+// it if it already exists. If successful, methods on the returned
+// File can be used for I/O; the associated file descriptor has mode
+// O_RDWR.
+// If there is an error, it will be of type *PathError.
+func Create(name string) (*os.File, error) {
+	return os.Create(name)
+}
+
+// Open opens the named file for reading. If successful, methods on
+// the returned file can be used for reading; the associated file
+// descriptor has mode O_RDONLY.
+// If there is an error, it will be of type *PathError.
+func Open(name string) (*os.File, error) {
+	return os.Open(name)
+}
+
+// OpenFile is the generalized open call; most users will use Open
+// or Create instead. It opens the named file with specified flag
+// (O_RDONLY etc.) and perm, (0666 etc.) if applicable. If successful,
+// methods on the returned File can be used for I/O.
+// If there is an error, it will be of type *PathError.
+func OpenFile(name string, flag int, perm os.FileMode) (*os.File, error) {
+	return os.OpenFile(name, flag, perm)
+}
+
+// CreateTemp creates a new temporary file in the directory dir
+// with a name beginning with prefix, opens the file for reading
+// and writing, and returns the resulting *os.File.
+// If dir is the empty string, TempFile uses the default directory
+// for temporary files (see os.TempDir).
+// Multiple programs calling TempFile simultaneously
+// will not choose the same file. The caller can use f.Name()
+// to find the pathname of the file. It is the caller's responsibility
+// to remove the file when no longer needed.
+func CreateTemp(dir, prefix string) (f *os.File, err error) {
+	return os.CreateTemp(dir, prefix)
+}

vendor/github.com/moby/sys/sequential/sequential_windows.go

@@ -0,0 +1,161 @@
+package sequential
+
+import (
+	"os"
+	"path/filepath"
+	"strconv"
+	"sync"
+	"syscall"
+	"time"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+// Create creates the named file with mode 0666 (before umask), truncating
+// it if it already exists. If successful, methods on the returned
+// File can be used for I/O; the associated file descriptor has mode
+// O_RDWR.
+// If there is an error, it will be of type *PathError.
+func Create(name string) (*os.File, error) {
+	return OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0)
+}
+
+// Open opens the named file for reading. If successful, methods on
+// the returned file can be used for reading; the associated file
+// descriptor has mode O_RDONLY.
+// If there is an error, it will be of type *PathError.
+func Open(name string) (*os.File, error) {
+	return OpenFile(name, os.O_RDONLY, 0)
+}
+
+// OpenFile is the generalized open call; most users will use Open
+// or Create instead.
+// If there is an error, it will be of type *PathError.
+func OpenFile(name string, flag int, _ os.FileMode) (*os.File, error) {
+	if name == "" {
+		return nil, &os.PathError{Op: "open", Path: name, Err: syscall.ENOENT}
+	}
+	r, err := openFileSequential(name, flag, 0)
+	if err == nil {
+		return r, nil
+	}
+	return nil, &os.PathError{Op: "open", Path: name, Err: err}
+}
+
+func openFileSequential(name string, flag int, _ os.FileMode) (file *os.File, err error) {
+	r, e := openSequential(name, flag|windows.O_CLOEXEC, 0)
+	if e != nil {
+		return nil, e
+	}
+	return os.NewFile(uintptr(r), name), nil
+}
+
+func makeInheritSa() *windows.SecurityAttributes {
+	var sa windows.SecurityAttributes
+	sa.Length = uint32(unsafe.Sizeof(sa))
+	sa.InheritHandle = 1
+	return &sa
+}
+
+func openSequential(path string, mode int, _ uint32) (fd windows.Handle, err error) {
+	if len(path) == 0 {
+		return windows.InvalidHandle, windows.ERROR_FILE_NOT_FOUND
+	}
+	pathp, err := windows.UTF16PtrFromString(path)
+	if err != nil {
+		return windows.InvalidHandle, err
+	}
+	var access uint32
+	switch mode & (windows.O_RDONLY | windows.O_WRONLY | windows.O_RDWR) {
+	case windows.O_RDONLY:
+		access = windows.GENERIC_READ
+	case windows.O_WRONLY:
+		access = windows.GENERIC_WRITE
+	case windows.O_RDWR:
+		access = windows.GENERIC_READ | windows.GENERIC_WRITE
+	}
+	if mode&windows.O_CREAT != 0 {
+		access |= windows.GENERIC_WRITE
+	}
+	if mode&windows.O_APPEND != 0 {
+		access &^= windows.GENERIC_WRITE
+		access |= windows.FILE_APPEND_DATA
+	}
+	sharemode := uint32(windows.FILE_SHARE_READ | windows.FILE_SHARE_WRITE)
+	var sa *windows.SecurityAttributes
+	if mode&windows.O_CLOEXEC == 0 {
+		sa = makeInheritSa()
+	}
+	var createmode uint32
+	switch {
+	case mode&(windows.O_CREAT|windows.O_EXCL) == (windows.O_CREAT | windows.O_EXCL):
+		createmode = windows.CREATE_NEW
+	case mode&(windows.O_CREAT|windows.O_TRUNC) == (windows.O_CREAT | windows.O_TRUNC):
+		createmode = windows.CREATE_ALWAYS
+	case mode&windows.O_CREAT == windows.O_CREAT:
+		createmode = windows.OPEN_ALWAYS
+	case mode&windows.O_TRUNC == windows.O_TRUNC:
+		createmode = windows.TRUNCATE_EXISTING
+	default:
+		createmode = windows.OPEN_EXISTING
+	}
+	// Use FILE_FLAG_SEQUENTIAL_SCAN rather than FILE_ATTRIBUTE_NORMAL as implemented in golang.
+	// https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858(v=vs.85).aspx
+	const fileFlagSequentialScan = 0x08000000 // FILE_FLAG_SEQUENTIAL_SCAN
+	h, e := windows.CreateFile(pathp, access, sharemode, sa, createmode, fileFlagSequentialScan, 0)
+	return h, e
+}
+
+// Helpers for CreateTemp
+var rand uint32
+var randmu sync.Mutex
+
+func reseed() uint32 {
+	return uint32(time.Now().UnixNano() + int64(os.Getpid()))
+}
+
+func nextSuffix() string {
+	randmu.Lock()
+	r := rand
+	if r == 0 {
+		r = reseed()
+	}
+	r = r*1664525 + 1013904223 // constants from Numerical Recipes
+	rand = r
+	randmu.Unlock()
+	return strconv.Itoa(int(1e9 + r%1e9))[1:]
+}
+
+// CreateTemp is a copy of os.CreateTemp, modified to use sequential
+// file access. Below is the original comment from golang:
+// TempFile creates a new temporary file in the directory dir
+// with a name beginning with prefix, opens the file for reading
+// and writing, and returns the resulting *os.File.
+// If dir is the empty string, TempFile uses the default directory
+// for temporary files (see os.TempDir).
+// Multiple programs calling TempFile simultaneously
+// will not choose the same file. The caller can use f.Name()
+// to find the pathname of the file. It is the caller's responsibility
+// to remove the file when no longer needed.
+func CreateTemp(dir, prefix string) (f *os.File, err error) {
+	if dir == "" {
+		dir = os.TempDir()
+	}
+
+	nconflict := 0
+	for i := 0; i < 10000; i++ {
+		name := filepath.Join(dir, prefix+nextSuffix())
+		f, err = OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0o600)
+		if os.IsExist(err) {
+			if nconflict++; nconflict > 10 {
+				randmu.Lock()
+				rand = reseed()
+				randmu.Unlock()
+			}
+			continue
+		}
+		break
+	}
+	return
+}

vendor/github.com/moby/sys/signal/signal_windows.go

@@ -31,4 +31,27 @@ var SignalMap = map[string]syscall.Signal{
 	"SEGV": syscall.Signal(windows.SIGSEGV),
 	"TERM": syscall.Signal(windows.SIGTERM),
 	"TRAP": syscall.Signal(windows.SIGTRAP),
+
+	// additional linux signals supported for LCOW
+	"CHLD":   syscall.Signal(0x11),
+	"CLD":    syscall.Signal(0x11),
+	"CONT":   syscall.Signal(0x12),
+	"IO":     syscall.Signal(0x1d),
+	"IOT":    syscall.Signal(0x6),
+	"POLL":   syscall.Signal(0x1d),
+	"PROF":   syscall.Signal(0x1b),
+	"PWR":    syscall.Signal(0x1e),
+	"STKFLT": syscall.Signal(0x10),
+	"STOP":   syscall.Signal(0x13),
+	"SYS":    syscall.Signal(0x1f),
+	"TSTP":   syscall.Signal(0x14),
+	"TTIN":   syscall.Signal(0x15),
+	"TTOU":   syscall.Signal(0x16),
+	"URG":    syscall.Signal(0x17),
+	"USR1":   syscall.Signal(0xa),
+	"USR2":   syscall.Signal(0xc),
+	"VTALRM": syscall.Signal(0x1a),
+	"WINCH":  syscall.Signal(0x1c),
+	"XCPU":   syscall.Signal(0x18),
+	"XFSZ":   syscall.Signal(0x19),
 }