Bump github.com/docker/docker

Bumps [github.com/docker/docker](https://github.com/docker/docker) from 20.10.3-0.20210216175712-646072ed6524+incompatible to 20.10.6+incompatible.
- [Release notes](https://github.com/docker/docker/releases)
- [Changelog](https://github.com/moby/moby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/docker/docker/commits/v20.10.6)

Signed-off-by: dependabot[bot] <support@github.com>

20 files changed, 0 insertions, 1876 deletions

diff --git a/vendor/github.com/containerd/continuity/fs/copy.go b/vendor/github.com/containerd/continuity/fs/copy.go
deleted file mode 100644
index 818bba2cd..000000000
--- a/vendor/github.com/containerd/continuity/fs/copy.go
+++ /dev/null
@@ -1,176 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"io/ioutil"
-	"os"
-	"path/filepath"
-	"sync"
-
-	"github.com/pkg/errors"
-)
-
-var bufferPool = &sync.Pool{
-	New: func() interface{} {
-		buffer := make([]byte, 32*1024)
-		return &buffer
-	},
-}
-
-// XAttrErrorHandlers transform a non-nil xattr error.
-// Return nil to ignore an error.
-// xattrKey can be empty for listxattr operation.
-type XAttrErrorHandler func(dst, src, xattrKey string, err error) error
-
-type copyDirOpts struct {
-	xeh XAttrErrorHandler
-}
-
-type CopyDirOpt func(*copyDirOpts) error
-
-// WithXAttrErrorHandler allows specifying XAttrErrorHandler
-// If nil XAttrErrorHandler is specified (default), CopyDir stops
-// on a non-nil xattr error.
-func WithXAttrErrorHandler(xeh XAttrErrorHandler) CopyDirOpt {
-	return func(o *copyDirOpts) error {
-		o.xeh = xeh
-		return nil
-	}
-}
-
-// WithAllowXAttrErrors allows ignoring xattr errors.
-func WithAllowXAttrErrors() CopyDirOpt {
-	xeh := func(dst, src, xattrKey string, err error) error {
-		return nil
-	}
-	return WithXAttrErrorHandler(xeh)
-}
-
-// CopyDir copies the directory from src to dst.
-// Most efficient copy of files is attempted.
-func CopyDir(dst, src string, opts ...CopyDirOpt) error {
-	var o copyDirOpts
-	for _, opt := range opts {
-		if err := opt(&o); err != nil {
-			return err
-		}
-	}
-	inodes := map[uint64]string{}
-	return copyDirectory(dst, src, inodes, &o)
-}
-
-func copyDirectory(dst, src string, inodes map[uint64]string, o *copyDirOpts) error {
-	stat, err := os.Stat(src)
-	if err != nil {
-		return errors.Wrapf(err, "failed to stat %s", src)
-	}
-	if !stat.IsDir() {
-		return errors.Errorf("source %s is not directory", src)
-	}
-
-	if st, err := os.Stat(dst); err != nil {
-		if err := os.Mkdir(dst, stat.Mode()); err != nil {
-			return errors.Wrapf(err, "failed to mkdir %s", dst)
-		}
-	} else if !st.IsDir() {
-		return errors.Errorf("cannot copy to non-directory: %s", dst)
-	} else {
-		if err := os.Chmod(dst, stat.Mode()); err != nil {
-			return errors.Wrapf(err, "failed to chmod on %s", dst)
-		}
-	}
-
-	fis, err := ioutil.ReadDir(src)
-	if err != nil {
-		return errors.Wrapf(err, "failed to read %s", src)
-	}
-
-	if err := copyFileInfo(stat, dst); err != nil {
-		return errors.Wrapf(err, "failed to copy file info for %s", dst)
-	}
-
-	if err := copyXAttrs(dst, src, o.xeh); err != nil {
-		return errors.Wrap(err, "failed to copy xattrs")
-	}
-
-	for _, fi := range fis {
-		source := filepath.Join(src, fi.Name())
-		target := filepath.Join(dst, fi.Name())
-
-		switch {
-		case fi.IsDir():
-			if err := copyDirectory(target, source, inodes, o); err != nil {
-				return err
-			}
-			continue
-		case (fi.Mode() & os.ModeType) == 0:
-			link, err := getLinkSource(target, fi, inodes)
-			if err != nil {
-				return errors.Wrap(err, "failed to get hardlink")
-			}
-			if link != "" {
-				if err := os.Link(link, target); err != nil {
-					return errors.Wrap(err, "failed to create hard link")
-				}
-			} else if err := CopyFile(target, source); err != nil {
-				return errors.Wrap(err, "failed to copy files")
-			}
-		case (fi.Mode() & os.ModeSymlink) == os.ModeSymlink:
-			link, err := os.Readlink(source)
-			if err != nil {
-				return errors.Wrapf(err, "failed to read link: %s", source)
-			}
-			if err := os.Symlink(link, target); err != nil {
-				return errors.Wrapf(err, "failed to create symlink: %s", target)
-			}
-		case (fi.Mode() & os.ModeDevice) == os.ModeDevice:
-			if err := copyDevice(target, fi); err != nil {
-				return errors.Wrapf(err, "failed to create device")
-			}
-		default:
-			// TODO: Support pipes and sockets
-			return errors.Wrapf(err, "unsupported mode %s", fi.Mode())
-		}
-		if err := copyFileInfo(fi, target); err != nil {
-			return errors.Wrap(err, "failed to copy file info")
-		}
-
-		if err := copyXAttrs(target, source, o.xeh); err != nil {
-			return errors.Wrap(err, "failed to copy xattrs")
-		}
-	}
-
-	return nil
-}
-
-// CopyFile copies the source file to the target.
-// The most efficient means of copying is used for the platform.
-func CopyFile(target, source string) error {
-	src, err := os.Open(source)
-	if err != nil {
-		return errors.Wrapf(err, "failed to open source %s", source)
-	}
-	defer src.Close()
-	tgt, err := os.Create(target)
-	if err != nil {
-		return errors.Wrapf(err, "failed to open target %s", target)
-	}
-	defer tgt.Close()
-
-	return copyFileContent(tgt, src)
-}
diff --git a/vendor/github.com/containerd/continuity/fs/copy_darwinopenbsdsolaris.go b/vendor/github.com/containerd/continuity/fs/copy_darwinopenbsdsolaris.go
deleted file mode 100644
index 92ccacf9a..000000000
--- a/vendor/github.com/containerd/continuity/fs/copy_darwinopenbsdsolaris.go
+++ /dev/null
@@ -1,40 +0,0 @@
-// +build darwin openbsd solaris
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"os"
-	"syscall"
-
-	"github.com/pkg/errors"
-	"golang.org/x/sys/unix"
-)
-
-func copyDevice(dst string, fi os.FileInfo) error {
-	st, ok := fi.Sys().(*syscall.Stat_t)
-	if !ok {
-		return errors.New("unsupported stat type")
-	}
-	return unix.Mknod(dst, uint32(fi.Mode()), int(st.Rdev))
-}
-
-func utimesNano(name string, atime, mtime syscall.Timespec) error {
-	timespec := []syscall.Timespec{atime, mtime}
-	return syscall.UtimesNano(name, timespec)
-}
diff --git a/vendor/github.com/containerd/continuity/fs/copy_freebsd.go b/vendor/github.com/containerd/continuity/fs/copy_freebsd.go
deleted file mode 100644
index 4b116c95e..000000000
--- a/vendor/github.com/containerd/continuity/fs/copy_freebsd.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// +build freebsd
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"os"
-	"syscall"
-
-	"github.com/pkg/errors"
-	"golang.org/x/sys/unix"
-)
-
-func copyDevice(dst string, fi os.FileInfo) error {
-	st, ok := fi.Sys().(*syscall.Stat_t)
-	if !ok {
-		return errors.New("unsupported stat type")
-	}
-	return unix.Mknod(dst, uint32(fi.Mode()), st.Rdev)
-}
-
-func utimesNano(name string, atime, mtime syscall.Timespec) error {
-	at := unix.NsecToTimespec(atime.Nano())
-	mt := unix.NsecToTimespec(mtime.Nano())
-	utimes := [2]unix.Timespec{at, mt}
-	return unix.UtimesNanoAt(unix.AT_FDCWD, name, utimes[0:], unix.AT_SYMLINK_NOFOLLOW)
-}
diff --git a/vendor/github.com/containerd/continuity/fs/copy_linux.go b/vendor/github.com/containerd/continuity/fs/copy_linux.go
deleted file mode 100644
index 72bae7d4e..000000000
--- a/vendor/github.com/containerd/continuity/fs/copy_linux.go
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"io"
-	"os"
-	"syscall"
-
-	"github.com/containerd/continuity/sysx"
-	"github.com/pkg/errors"
-	"golang.org/x/sys/unix"
-)
-
-func copyFileInfo(fi os.FileInfo, name string) error {
-	st := fi.Sys().(*syscall.Stat_t)
-	if err := os.Lchown(name, int(st.Uid), int(st.Gid)); err != nil {
-		if os.IsPermission(err) {
-			// Normally if uid/gid are the same this would be a no-op, but some
-			// filesystems may still return EPERM... for instance NFS does this.
-			// In such a case, this is not an error.
-			if dstStat, err2 := os.Lstat(name); err2 == nil {
-				st2 := dstStat.Sys().(*syscall.Stat_t)
-				if st.Uid == st2.Uid && st.Gid == st2.Gid {
-					err = nil
-				}
-			}
-		}
-		if err != nil {
-			return errors.Wrapf(err, "failed to chown %s", name)
-		}
-	}
-
-	if (fi.Mode() & os.ModeSymlink) != os.ModeSymlink {
-		if err := os.Chmod(name, fi.Mode()); err != nil {
-			return errors.Wrapf(err, "failed to chmod %s", name)
-		}
-	}
-
-	timespec := []unix.Timespec{
-		unix.NsecToTimespec(syscall.TimespecToNsec(StatAtime(st))),
-		unix.NsecToTimespec(syscall.TimespecToNsec(StatMtime(st))),
-	}
-	if err := unix.UtimesNanoAt(unix.AT_FDCWD, name, timespec, unix.AT_SYMLINK_NOFOLLOW); err != nil {
-		return errors.Wrapf(err, "failed to utime %s", name)
-	}
-
-	return nil
-}
-
-const maxSSizeT = int64(^uint(0) >> 1)
-
-func copyFileContent(dst, src *os.File) error {
-	st, err := src.Stat()
-	if err != nil {
-		return errors.Wrap(err, "unable to stat source")
-	}
-
-	size := st.Size()
-	first := true
-	srcFd := int(src.Fd())
-	dstFd := int(dst.Fd())
-
-	for size > 0 {
-		// Ensure that we are never trying to copy more than SSIZE_MAX at a
-		// time and at the same time avoids overflows when the file is larger
-		// than 4GB on 32-bit systems.
-		var copySize int
-		if size > maxSSizeT {
-			copySize = int(maxSSizeT)
-		} else {
-			copySize = int(size)
-		}
-		n, err := unix.CopyFileRange(srcFd, nil, dstFd, nil, copySize, 0)
-		if err != nil {
-			if (err != unix.ENOSYS && err != unix.EXDEV) || !first {
-				return errors.Wrap(err, "copy file range failed")
-			}
-
-			buf := bufferPool.Get().(*[]byte)
-			_, err = io.CopyBuffer(dst, src, *buf)
-			bufferPool.Put(buf)
-			return errors.Wrap(err, "userspace copy failed")
-		}
-
-		first = false
-		size -= int64(n)
-	}
-
-	return nil
-}
-
-func copyXAttrs(dst, src string, xeh XAttrErrorHandler) error {
-	xattrKeys, err := sysx.LListxattr(src)
-	if err != nil {
-		e := errors.Wrapf(err, "failed to list xattrs on %s", src)
-		if xeh != nil {
-			e = xeh(dst, src, "", e)
-		}
-		return e
-	}
-	for _, xattr := range xattrKeys {
-		data, err := sysx.LGetxattr(src, xattr)
-		if err != nil {
-			e := errors.Wrapf(err, "failed to get xattr %q on %s", xattr, src)
-			if xeh != nil {
-				if e = xeh(dst, src, xattr, e); e == nil {
-					continue
-				}
-			}
-			return e
-		}
-		if err := sysx.LSetxattr(dst, xattr, data, 0); err != nil {
-			e := errors.Wrapf(err, "failed to set xattr %q on %s", xattr, dst)
-			if xeh != nil {
-				if e = xeh(dst, src, xattr, e); e == nil {
-					continue
-				}
-			}
-			return e
-		}
-	}
-
-	return nil
-}
-
-func copyDevice(dst string, fi os.FileInfo) error {
-	st, ok := fi.Sys().(*syscall.Stat_t)
-	if !ok {
-		return errors.New("unsupported stat type")
-	}
-	return unix.Mknod(dst, uint32(fi.Mode()), int(st.Rdev))
-}
diff --git a/vendor/github.com/containerd/continuity/fs/copy_unix.go b/vendor/github.com/containerd/continuity/fs/copy_unix.go
deleted file mode 100644
index dfd857aaa..000000000
--- a/vendor/github.com/containerd/continuity/fs/copy_unix.go
+++ /dev/null
@@ -1,102 +0,0 @@
-// +build darwin freebsd openbsd solaris
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"io"
-	"os"
-	"syscall"
-
-	"github.com/containerd/continuity/sysx"
-	"github.com/pkg/errors"
-)
-
-func copyFileInfo(fi os.FileInfo, name string) error {
-	st := fi.Sys().(*syscall.Stat_t)
-	if err := os.Lchown(name, int(st.Uid), int(st.Gid)); err != nil {
-		if os.IsPermission(err) {
-			// Normally if uid/gid are the same this would be a no-op, but some
-			// filesystems may still return EPERM... for instance NFS does this.
-			// In such a case, this is not an error.
-			if dstStat, err2 := os.Lstat(name); err2 == nil {
-				st2 := dstStat.Sys().(*syscall.Stat_t)
-				if st.Uid == st2.Uid && st.Gid == st2.Gid {
-					err = nil
-				}
-			}
-		}
-		if err != nil {
-			return errors.Wrapf(err, "failed to chown %s", name)
-		}
-	}
-
-	if (fi.Mode() & os.ModeSymlink) != os.ModeSymlink {
-		if err := os.Chmod(name, fi.Mode()); err != nil {
-			return errors.Wrapf(err, "failed to chmod %s", name)
-		}
-	}
-
-	if err := utimesNano(name, StatAtime(st), StatMtime(st)); err != nil {
-		return errors.Wrapf(err, "failed to utime %s", name)
-	}
-
-	return nil
-}
-
-func copyFileContent(dst, src *os.File) error {
-	buf := bufferPool.Get().(*[]byte)
-	_, err := io.CopyBuffer(dst, src, *buf)
-	bufferPool.Put(buf)
-
-	return err
-}
-
-func copyXAttrs(dst, src string, xeh XAttrErrorHandler) error {
-	xattrKeys, err := sysx.LListxattr(src)
-	if err != nil {
-		e := errors.Wrapf(err, "failed to list xattrs on %s", src)
-		if xeh != nil {
-			e = xeh(dst, src, "", e)
-		}
-		return e
-	}
-	for _, xattr := range xattrKeys {
-		data, err := sysx.LGetxattr(src, xattr)
-		if err != nil {
-			e := errors.Wrapf(err, "failed to get xattr %q on %s", xattr, src)
-			if xeh != nil {
-				if e = xeh(dst, src, xattr, e); e == nil {
-					continue
-				}
-			}
-			return e
-		}
-		if err := sysx.LSetxattr(dst, xattr, data, 0); err != nil {
-			e := errors.Wrapf(err, "failed to set xattr %q on %s", xattr, dst)
-			if xeh != nil {
-				if e = xeh(dst, src, xattr, e); e == nil {
-					continue
-				}
-			}
-			return e
-		}
-	}
-
-	return nil
-}
diff --git a/vendor/github.com/containerd/continuity/fs/copy_windows.go b/vendor/github.com/containerd/continuity/fs/copy_windows.go
deleted file mode 100644
index 27c7d7dbb..000000000
--- a/vendor/github.com/containerd/continuity/fs/copy_windows.go
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"io"
-	"os"
-
-	"github.com/pkg/errors"
-)
-
-func copyFileInfo(fi os.FileInfo, name string) error {
-	if err := os.Chmod(name, fi.Mode()); err != nil {
-		return errors.Wrapf(err, "failed to chmod %s", name)
-	}
-
-	// TODO: copy windows specific metadata
-
-	return nil
-}
-
-func copyFileContent(dst, src *os.File) error {
-	buf := bufferPool.Get().(*[]byte)
-	_, err := io.CopyBuffer(dst, src, *buf)
-	bufferPool.Put(buf)
-	return err
-}
-
-func copyXAttrs(dst, src string, xeh XAttrErrorHandler) error {
-	return nil
-}
-
-func copyDevice(dst string, fi os.FileInfo) error {
-	return errors.New("device copy not supported")
-}
diff --git a/vendor/github.com/containerd/continuity/fs/diff.go b/vendor/github.com/containerd/continuity/fs/diff.go
deleted file mode 100644
index e64f9e73d..000000000
--- a/vendor/github.com/containerd/continuity/fs/diff.go
+++ /dev/null
@@ -1,326 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"context"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"golang.org/x/sync/errgroup"
-
-	"github.com/sirupsen/logrus"
-)
-
-// ChangeKind is the type of modification that
-// a change is making.
-type ChangeKind int
-
-const (
-	// ChangeKindUnmodified represents an unmodified
-	// file
-	ChangeKindUnmodified = iota
-
-	// ChangeKindAdd represents an addition of
-	// a file
-	ChangeKindAdd
-
-	// ChangeKindModify represents a change to
-	// an existing file
-	ChangeKindModify
-
-	// ChangeKindDelete represents a delete of
-	// a file
-	ChangeKindDelete
-)
-
-func (k ChangeKind) String() string {
-	switch k {
-	case ChangeKindUnmodified:
-		return "unmodified"
-	case ChangeKindAdd:
-		return "add"
-	case ChangeKindModify:
-		return "modify"
-	case ChangeKindDelete:
-		return "delete"
-	default:
-		return ""
-	}
-}
-
-// Change represents single change between a diff and its parent.
-type Change struct {
-	Kind ChangeKind
-	Path string
-}
-
-// ChangeFunc is the type of function called for each change
-// computed during a directory changes calculation.
-type ChangeFunc func(ChangeKind, string, os.FileInfo, error) error
-
-// Changes computes changes between two directories calling the
-// given change function for each computed change. The first
-// directory is intended to the base directory and second
-// directory the changed directory.
-//
-// The change callback is called by the order of path names and
-// should be appliable in that order.
-//  Due to this apply ordering, the following is true
-//  - Removed directory trees only create a single change for the root
-//    directory removed. Remaining changes are implied.
-//  - A directory which is modified to become a file will not have
-//    delete entries for sub-path items, their removal is implied
-//    by the removal of the parent directory.
-//
-// Opaque directories will not be treated specially and each file
-// removed from the base directory will show up as a removal.
-//
-// File content comparisons will be done on files which have timestamps
-// which may have been truncated. If either of the files being compared
-// has a zero value nanosecond value, each byte will be compared for
-// differences. If 2 files have the same seconds value but different
-// nanosecond values where one of those values is zero, the files will
-// be considered unchanged if the content is the same. This behavior
-// is to account for timestamp truncation during archiving.
-func Changes(ctx context.Context, a, b string, changeFn ChangeFunc) error {
-	if a == "" {
-		logrus.Debugf("Using single walk diff for %s", b)
-		return addDirChanges(ctx, changeFn, b)
-	} else if diffOptions := detectDirDiff(b, a); diffOptions != nil {
-		logrus.Debugf("Using single walk diff for %s from %s", diffOptions.diffDir, a)
-		return diffDirChanges(ctx, changeFn, a, diffOptions)
-	}
-
-	logrus.Debugf("Using double walk diff for %s from %s", b, a)
-	return doubleWalkDiff(ctx, changeFn, a, b)
-}
-
-func addDirChanges(ctx context.Context, changeFn ChangeFunc, root string) error {
-	return filepath.Walk(root, func(path string, f os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
-		// Rebase path
-		path, err = filepath.Rel(root, path)
-		if err != nil {
-			return err
-		}
-
-		path = filepath.Join(string(os.PathSeparator), path)
-
-		// Skip root
-		if path == string(os.PathSeparator) {
-			return nil
-		}
-
-		return changeFn(ChangeKindAdd, path, f, nil)
-	})
-}
-
-// diffDirOptions is used when the diff can be directly calculated from
-// a diff directory to its base, without walking both trees.
-type diffDirOptions struct {
-	diffDir      string
-	skipChange   func(string) (bool, error)
-	deleteChange func(string, string, os.FileInfo) (string, error)
-}
-
-// diffDirChanges walks the diff directory and compares changes against the base.
-func diffDirChanges(ctx context.Context, changeFn ChangeFunc, base string, o *diffDirOptions) error {
-	changedDirs := make(map[string]struct{})
-	return filepath.Walk(o.diffDir, func(path string, f os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
-		// Rebase path
-		path, err = filepath.Rel(o.diffDir, path)
-		if err != nil {
-			return err
-		}
-
-		path = filepath.Join(string(os.PathSeparator), path)
-
-		// Skip root
-		if path == string(os.PathSeparator) {
-			return nil
-		}
-
-		// TODO: handle opaqueness, start new double walker at this
-		// location to get deletes, and skip tree in single walker
-
-		if o.skipChange != nil {
-			if skip, err := o.skipChange(path); skip {
-				return err
-			}
-		}
-
-		var kind ChangeKind
-
-		deletedFile, err := o.deleteChange(o.diffDir, path, f)
-		if err != nil {
-			return err
-		}
-
-		// Find out what kind of modification happened
-		if deletedFile != "" {
-			path = deletedFile
-			kind = ChangeKindDelete
-			f = nil
-		} else {
-			// Otherwise, the file was added
-			kind = ChangeKindAdd
-
-			// ...Unless it already existed in a base, in which case, it's a modification
-			stat, err := os.Stat(filepath.Join(base, path))
-			if err != nil && !os.IsNotExist(err) {
-				return err
-			}
-			if err == nil {
-				// The file existed in the base, so that's a modification
-
-				// However, if it's a directory, maybe it wasn't actually modified.
-				// If you modify /foo/bar/baz, then /foo will be part of the changed files only because it's the parent of bar
-				if stat.IsDir() && f.IsDir() {
-					if f.Size() == stat.Size() && f.Mode() == stat.Mode() && sameFsTime(f.ModTime(), stat.ModTime()) {
-						// Both directories are the same, don't record the change
-						return nil
-					}
-				}
-				kind = ChangeKindModify
-			}
-		}
-
-		// If /foo/bar/file.txt is modified, then /foo/bar must be part of the changed files.
-		// This block is here to ensure the change is recorded even if the
-		// modify time, mode and size of the parent directory in the rw and ro layers are all equal.
-		// Check https://github.com/docker/docker/pull/13590 for details.
-		if f.IsDir() {
-			changedDirs[path] = struct{}{}
-		}
-		if kind == ChangeKindAdd || kind == ChangeKindDelete {
-			parent := filepath.Dir(path)
-			if _, ok := changedDirs[parent]; !ok && parent != "/" {
-				pi, err := os.Stat(filepath.Join(o.diffDir, parent))
-				if err := changeFn(ChangeKindModify, parent, pi, err); err != nil {
-					return err
-				}
-				changedDirs[parent] = struct{}{}
-			}
-		}
-
-		return changeFn(kind, path, f, nil)
-	})
-}
-
-// doubleWalkDiff walks both directories to create a diff
-func doubleWalkDiff(ctx context.Context, changeFn ChangeFunc, a, b string) (err error) {
-	g, ctx := errgroup.WithContext(ctx)
-
-	var (
-		c1 = make(chan *currentPath)
-		c2 = make(chan *currentPath)
-
-		f1, f2 *currentPath
-		rmdir  string
-	)
-	g.Go(func() error {
-		defer close(c1)
-		return pathWalk(ctx, a, c1)
-	})
-	g.Go(func() error {
-		defer close(c2)
-		return pathWalk(ctx, b, c2)
-	})
-	g.Go(func() error {
-		for c1 != nil || c2 != nil {
-			if f1 == nil && c1 != nil {
-				f1, err = nextPath(ctx, c1)
-				if err != nil {
-					return err
-				}
-				if f1 == nil {
-					c1 = nil
-				}
-			}
-
-			if f2 == nil && c2 != nil {
-				f2, err = nextPath(ctx, c2)
-				if err != nil {
-					return err
-				}
-				if f2 == nil {
-					c2 = nil
-				}
-			}
-			if f1 == nil && f2 == nil {
-				continue
-			}
-
-			var f os.FileInfo
-			k, p := pathChange(f1, f2)
-			switch k {
-			case ChangeKindAdd:
-				if rmdir != "" {
-					rmdir = ""
-				}
-				f = f2.f
-				f2 = nil
-			case ChangeKindDelete:
-				// Check if this file is already removed by being
-				// under of a removed directory
-				if rmdir != "" && strings.HasPrefix(f1.path, rmdir) {
-					f1 = nil
-					continue
-				} else if f1.f.IsDir() {
-					rmdir = f1.path + string(os.PathSeparator)
-				} else if rmdir != "" {
-					rmdir = ""
-				}
-				f1 = nil
-			case ChangeKindModify:
-				same, err := sameFile(f1, f2)
-				if err != nil {
-					return err
-				}
-				if f1.f.IsDir() && !f2.f.IsDir() {
-					rmdir = f1.path + string(os.PathSeparator)
-				} else if rmdir != "" {
-					rmdir = ""
-				}
-				f = f2.f
-				f1 = nil
-				f2 = nil
-				if same {
-					if !isLinked(f) {
-						continue
-					}
-					k = ChangeKindUnmodified
-				}
-			}
-			if err := changeFn(k, p, f, nil); err != nil {
-				return err
-			}
-		}
-		return nil
-	})
-
-	return g.Wait()
-}
diff --git a/vendor/github.com/containerd/continuity/fs/diff_unix.go b/vendor/github.com/containerd/continuity/fs/diff_unix.go
deleted file mode 100644
index 7913af27d..000000000
--- a/vendor/github.com/containerd/continuity/fs/diff_unix.go
+++ /dev/null
@@ -1,74 +0,0 @@
-// +build !windows
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"bytes"
-	"os"
-	"syscall"
-
-	"github.com/containerd/continuity/sysx"
-	"github.com/pkg/errors"
-)
-
-// detectDirDiff returns diff dir options if a directory could
-// be found in the mount info for upper which is the direct
-// diff with the provided lower directory
-func detectDirDiff(upper, lower string) *diffDirOptions {
-	// TODO: get mount options for upper
-	// TODO: detect AUFS
-	// TODO: detect overlay
-	return nil
-}
-
-// compareSysStat returns whether the stats are equivalent,
-// whether the files are considered the same file, and
-// an error
-func compareSysStat(s1, s2 interface{}) (bool, error) {
-	ls1, ok := s1.(*syscall.Stat_t)
-	if !ok {
-		return false, nil
-	}
-	ls2, ok := s2.(*syscall.Stat_t)
-	if !ok {
-		return false, nil
-	}
-
-	return ls1.Mode == ls2.Mode && ls1.Uid == ls2.Uid && ls1.Gid == ls2.Gid && ls1.Rdev == ls2.Rdev, nil
-}
-
-func compareCapabilities(p1, p2 string) (bool, error) {
-	c1, err := sysx.LGetxattr(p1, "security.capability")
-	if err != nil && err != sysx.ENODATA {
-		return false, errors.Wrapf(err, "failed to get xattr for %s", p1)
-	}
-	c2, err := sysx.LGetxattr(p2, "security.capability")
-	if err != nil && err != sysx.ENODATA {
-		return false, errors.Wrapf(err, "failed to get xattr for %s", p2)
-	}
-	return bytes.Equal(c1, c2), nil
-}
-
-func isLinked(f os.FileInfo) bool {
-	s, ok := f.Sys().(*syscall.Stat_t)
-	if !ok {
-		return false
-	}
-	return !f.IsDir() && s.Nlink > 1
-}
diff --git a/vendor/github.com/containerd/continuity/fs/diff_windows.go b/vendor/github.com/containerd/continuity/fs/diff_windows.go
deleted file mode 100644
index 4bfa72d3a..000000000
--- a/vendor/github.com/containerd/continuity/fs/diff_windows.go
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"os"
-
-	"golang.org/x/sys/windows"
-)
-
-func detectDirDiff(upper, lower string) *diffDirOptions {
-	return nil
-}
-
-func compareSysStat(s1, s2 interface{}) (bool, error) {
-	f1, ok := s1.(windows.Win32FileAttributeData)
-	if !ok {
-		return false, nil
-	}
-	f2, ok := s2.(windows.Win32FileAttributeData)
-	if !ok {
-		return false, nil
-	}
-	return f1.FileAttributes == f2.FileAttributes, nil
-}
-
-func compareCapabilities(p1, p2 string) (bool, error) {
-	// TODO: Use windows equivalent
-	return true, nil
-}
-
-func isLinked(os.FileInfo) bool {
-	return false
-}
diff --git a/vendor/github.com/containerd/continuity/fs/dtype_linux.go b/vendor/github.com/containerd/continuity/fs/dtype_linux.go
deleted file mode 100644
index 10510d8de..000000000
--- a/vendor/github.com/containerd/continuity/fs/dtype_linux.go
+++ /dev/null
@@ -1,103 +0,0 @@
-// +build linux
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"fmt"
-	"io/ioutil"
-	"os"
-	"syscall"
-	"unsafe"
-)
-
-func locateDummyIfEmpty(path string) (string, error) {
-	children, err := ioutil.ReadDir(path)
-	if err != nil {
-		return "", err
-	}
-	if len(children) != 0 {
-		return "", nil
-	}
-	dummyFile, err := ioutil.TempFile(path, "fsutils-dummy")
-	if err != nil {
-		return "", err
-	}
-	name := dummyFile.Name()
-	err = dummyFile.Close()
-	return name, err
-}
-
-// SupportsDType returns whether the filesystem mounted on path supports d_type
-func SupportsDType(path string) (bool, error) {
-	// locate dummy so that we have at least one dirent
-	dummy, err := locateDummyIfEmpty(path)
-	if err != nil {
-		return false, err
-	}
-	if dummy != "" {
-		defer os.Remove(dummy)
-	}
-
-	visited := 0
-	supportsDType := true
-	fn := func(ent *syscall.Dirent) bool {
-		visited++
-		if ent.Type == syscall.DT_UNKNOWN {
-			supportsDType = false
-			// stop iteration
-			return true
-		}
-		// continue iteration
-		return false
-	}
-	if err = iterateReadDir(path, fn); err != nil {
-		return false, err
-	}
-	if visited == 0 {
-		return false, fmt.Errorf("did not hit any dirent during iteration %s", path)
-	}
-	return supportsDType, nil
-}
-
-func iterateReadDir(path string, fn func(*syscall.Dirent) bool) error {
-	d, err := os.Open(path)
-	if err != nil {
-		return err
-	}
-	defer d.Close()
-	fd := int(d.Fd())
-	buf := make([]byte, 4096)
-	for {
-		nbytes, err := syscall.ReadDirent(fd, buf)
-		if err != nil {
-			return err
-		}
-		if nbytes == 0 {
-			break
-		}
-		for off := 0; off < nbytes; {
-			ent := (*syscall.Dirent)(unsafe.Pointer(&buf[off]))
-			if stop := fn(ent); stop {
-				return nil
-			}
-			off += int(ent.Reclen)
-		}
-	}
-	return nil
-}
diff --git a/vendor/github.com/containerd/continuity/fs/du.go b/vendor/github.com/containerd/continuity/fs/du.go
deleted file mode 100644
index fccc985dc..000000000
--- a/vendor/github.com/containerd/continuity/fs/du.go
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import "context"
-
-// Usage of disk information
-type Usage struct {
-	Inodes int64
-	Size   int64
-}
-
-// DiskUsage counts the number of inodes and disk usage for the resources under
-// path.
-func DiskUsage(ctx context.Context, roots ...string) (Usage, error) {
-	return diskUsage(ctx, roots...)
-}
-
-// DiffUsage counts the numbers of inodes and disk usage in the
-// diff between the 2 directories. The first path is intended
-// as the base directory and the second as the changed directory.
-func DiffUsage(ctx context.Context, a, b string) (Usage, error) {
-	return diffUsage(ctx, a, b)
-}
diff --git a/vendor/github.com/containerd/continuity/fs/du_unix.go b/vendor/github.com/containerd/continuity/fs/du_unix.go
deleted file mode 100644
index 9da43d1bc..000000000
--- a/vendor/github.com/containerd/continuity/fs/du_unix.go
+++ /dev/null
@@ -1,120 +0,0 @@
-// +build !windows
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"context"
-	"os"
-	"path/filepath"
-	"syscall"
-)
-
-// blocksUnitSize is the unit used by `st_blocks` in `stat` in bytes.
-// See https://man7.org/linux/man-pages/man2/stat.2.html
-//   st_blocks
-//     This field indicates the number of blocks allocated to the
-//     file, in 512-byte units.  (This may be smaller than
-//     st_size/512 when the file has holes.)
-const blocksUnitSize = 512
-
-type inode struct {
-	// TODO(stevvooe): Can probably reduce memory usage by not tracking
-	// device, but we can leave this right for now.
-	dev, ino uint64
-}
-
-func newInode(stat *syscall.Stat_t) inode {
-	return inode{
-		// Dev is uint32 on darwin/bsd, uint64 on linux/solaris/freebsd
-		dev: uint64(stat.Dev), // nolint: unconvert
-		// Ino is uint32 on bsd, uint64 on darwin/linux/solaris/freebsd
-		ino: uint64(stat.Ino), // nolint: unconvert
-	}
-}
-
-func diskUsage(ctx context.Context, roots ...string) (Usage, error) {
-
-	var (
-		size   int64
-		inodes = map[inode]struct{}{} // expensive!
-	)
-
-	for _, root := range roots {
-		if err := filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
-			if err != nil {
-				return err
-			}
-
-			select {
-			case <-ctx.Done():
-				return ctx.Err()
-			default:
-			}
-
-			stat := fi.Sys().(*syscall.Stat_t)
-			inoKey := newInode(stat)
-			if _, ok := inodes[inoKey]; !ok {
-				inodes[inoKey] = struct{}{}
-				size += stat.Blocks * blocksUnitSize
-			}
-
-			return nil
-		}); err != nil {
-			return Usage{}, err
-		}
-	}
-
-	return Usage{
-		Inodes: int64(len(inodes)),
-		Size:   size,
-	}, nil
-}
-
-func diffUsage(ctx context.Context, a, b string) (Usage, error) {
-	var (
-		size   int64
-		inodes = map[inode]struct{}{} // expensive!
-	)
-
-	if err := Changes(ctx, a, b, func(kind ChangeKind, _ string, fi os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
-		if kind == ChangeKindAdd || kind == ChangeKindModify {
-			stat := fi.Sys().(*syscall.Stat_t)
-			inoKey := newInode(stat)
-			if _, ok := inodes[inoKey]; !ok {
-				inodes[inoKey] = struct{}{}
-				size += stat.Blocks * blocksUnitSize
-			}
-
-			return nil
-
-		}
-		return nil
-	}); err != nil {
-		return Usage{}, err
-	}
-
-	return Usage{
-		Inodes: int64(len(inodes)),
-		Size:   size,
-	}, nil
-}
diff --git a/vendor/github.com/containerd/continuity/fs/du_windows.go b/vendor/github.com/containerd/continuity/fs/du_windows.go
deleted file mode 100644
index 8f25ec59c..000000000
--- a/vendor/github.com/containerd/continuity/fs/du_windows.go
+++ /dev/null
@@ -1,82 +0,0 @@
-// +build windows
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"context"
-	"os"
-	"path/filepath"
-)
-
-func diskUsage(ctx context.Context, roots ...string) (Usage, error) {
-	var (
-		size int64
-	)
-
-	// TODO(stevvooe): Support inodes (or equivalent) for windows.
-
-	for _, root := range roots {
-		if err := filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
-			if err != nil {
-				return err
-			}
-
-			select {
-			case <-ctx.Done():
-				return ctx.Err()
-			default:
-			}
-
-			size += fi.Size()
-			return nil
-		}); err != nil {
-			return Usage{}, err
-		}
-	}
-
-	return Usage{
-		Size: size,
-	}, nil
-}
-
-func diffUsage(ctx context.Context, a, b string) (Usage, error) {
-	var (
-		size int64
-	)
-
-	if err := Changes(ctx, a, b, func(kind ChangeKind, _ string, fi os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
-		if kind == ChangeKindAdd || kind == ChangeKindModify {
-			size += fi.Size()
-
-			return nil
-
-		}
-		return nil
-	}); err != nil {
-		return Usage{}, err
-	}
-
-	return Usage{
-		Size: size,
-	}, nil
-}
diff --git a/vendor/github.com/containerd/continuity/fs/hardlink.go b/vendor/github.com/containerd/continuity/fs/hardlink.go
deleted file mode 100644
index 762aa45e6..000000000
--- a/vendor/github.com/containerd/continuity/fs/hardlink.go
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import "os"
-
-// GetLinkInfo returns an identifier representing the node a hardlink is pointing
-// to. If the file is not hard linked then 0 will be returned.
-func GetLinkInfo(fi os.FileInfo) (uint64, bool) {
-	return getLinkInfo(fi)
-}
-
-// getLinkSource returns a path for the given name and
-// file info to its link source in the provided inode
-// map. If the given file name is not in the map and
-// has other links, it is added to the inode map
-// to be a source for other link locations.
-func getLinkSource(name string, fi os.FileInfo, inodes map[uint64]string) (string, error) {
-	inode, isHardlink := getLinkInfo(fi)
-	if !isHardlink {
-		return "", nil
-	}
-
-	path, ok := inodes[inode]
-	if !ok {
-		inodes[inode] = name
-	}
-	return path, nil
-}
diff --git a/vendor/github.com/containerd/continuity/fs/hardlink_unix.go b/vendor/github.com/containerd/continuity/fs/hardlink_unix.go
deleted file mode 100644
index f95f0904c..000000000
--- a/vendor/github.com/containerd/continuity/fs/hardlink_unix.go
+++ /dev/null
@@ -1,34 +0,0 @@
-// +build !windows
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"os"
-	"syscall"
-)
-
-func getLinkInfo(fi os.FileInfo) (uint64, bool) {
-	s, ok := fi.Sys().(*syscall.Stat_t)
-	if !ok {
-		return 0, false
-	}
-
-	// Ino is uint32 on bsd, uint64 on darwin/linux/solaris
-	return uint64(s.Ino), !fi.IsDir() && s.Nlink > 1 // nolint: unconvert
-}
diff --git a/vendor/github.com/containerd/continuity/fs/hardlink_windows.go b/vendor/github.com/containerd/continuity/fs/hardlink_windows.go
deleted file mode 100644
index 748554714..000000000
--- a/vendor/github.com/containerd/continuity/fs/hardlink_windows.go
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import "os"
-
-func getLinkInfo(fi os.FileInfo) (uint64, bool) {
-	return 0, false
-}
diff --git a/vendor/github.com/containerd/continuity/fs/path.go b/vendor/github.com/containerd/continuity/fs/path.go
deleted file mode 100644
index c26be7989..000000000
--- a/vendor/github.com/containerd/continuity/fs/path.go
+++ /dev/null
@@ -1,311 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"bytes"
-	"context"
-	"io"
-	"os"
-	"path/filepath"
-
-	"github.com/pkg/errors"
-)
-
-var (
-	errTooManyLinks = errors.New("too many links")
-)
-
-type currentPath struct {
-	path     string
-	f        os.FileInfo
-	fullPath string
-}
-
-func pathChange(lower, upper *currentPath) (ChangeKind, string) {
-	if lower == nil {
-		if upper == nil {
-			panic("cannot compare nil paths")
-		}
-		return ChangeKindAdd, upper.path
-	}
-	if upper == nil {
-		return ChangeKindDelete, lower.path
-	}
-
-	switch i := directoryCompare(lower.path, upper.path); {
-	case i < 0:
-		// File in lower that is not in upper
-		return ChangeKindDelete, lower.path
-	case i > 0:
-		// File in upper that is not in lower
-		return ChangeKindAdd, upper.path
-	default:
-		return ChangeKindModify, upper.path
-	}
-}
-
-func directoryCompare(a, b string) int {
-	l := len(a)
-	if len(b) < l {
-		l = len(b)
-	}
-	for i := 0; i < l; i++ {
-		c1, c2 := a[i], b[i]
-		if c1 == filepath.Separator {
-			c1 = byte(0)
-		}
-		if c2 == filepath.Separator {
-			c2 = byte(0)
-		}
-		if c1 < c2 {
-			return -1
-		}
-		if c1 > c2 {
-			return +1
-		}
-	}
-	if len(a) < len(b) {
-		return -1
-	}
-	if len(a) > len(b) {
-		return +1
-	}
-	return 0
-}
-
-func sameFile(f1, f2 *currentPath) (bool, error) {
-	if os.SameFile(f1.f, f2.f) {
-		return true, nil
-	}
-
-	equalStat, err := compareSysStat(f1.f.Sys(), f2.f.Sys())
-	if err != nil || !equalStat {
-		return equalStat, err
-	}
-
-	if eq, err := compareCapabilities(f1.fullPath, f2.fullPath); err != nil || !eq {
-		return eq, err
-	}
-
-	// If not a directory also check size, modtime, and content
-	if !f1.f.IsDir() {
-		if f1.f.Size() != f2.f.Size() {
-			return false, nil
-		}
-		t1 := f1.f.ModTime()
-		t2 := f2.f.ModTime()
-
-		if t1.Unix() != t2.Unix() {
-			return false, nil
-		}
-
-		// If the timestamp may have been truncated in both of the
-		// files, check content of file to determine difference
-		if t1.Nanosecond() == 0 && t2.Nanosecond() == 0 {
-			if (f1.f.Mode() & os.ModeSymlink) == os.ModeSymlink {
-				return compareSymlinkTarget(f1.fullPath, f2.fullPath)
-			}
-			if f1.f.Size() == 0 { // if file sizes are zero length, the files are the same by definition
-				return true, nil
-			}
-			return compareFileContent(f1.fullPath, f2.fullPath)
-		} else if t1.Nanosecond() != t2.Nanosecond() {
-			return false, nil
-		}
-	}
-
-	return true, nil
-}
-
-func compareSymlinkTarget(p1, p2 string) (bool, error) {
-	t1, err := os.Readlink(p1)
-	if err != nil {
-		return false, err
-	}
-	t2, err := os.Readlink(p2)
-	if err != nil {
-		return false, err
-	}
-	return t1 == t2, nil
-}
-
-const compareChuckSize = 32 * 1024
-
-// compareFileContent compares the content of 2 same sized files
-// by comparing each byte.
-func compareFileContent(p1, p2 string) (bool, error) {
-	f1, err := os.Open(p1)
-	if err != nil {
-		return false, err
-	}
-	defer f1.Close()
-	f2, err := os.Open(p2)
-	if err != nil {
-		return false, err
-	}
-	defer f2.Close()
-
-	b1 := make([]byte, compareChuckSize)
-	b2 := make([]byte, compareChuckSize)
-	for {
-		n1, err1 := f1.Read(b1)
-		if err1 != nil && err1 != io.EOF {
-			return false, err1
-		}
-		n2, err2 := f2.Read(b2)
-		if err2 != nil && err2 != io.EOF {
-			return false, err2
-		}
-		if n1 != n2 || !bytes.Equal(b1[:n1], b2[:n2]) {
-			return false, nil
-		}
-		if err1 == io.EOF && err2 == io.EOF {
-			return true, nil
-		}
-	}
-}
-
-func pathWalk(ctx context.Context, root string, pathC chan<- *currentPath) error {
-	return filepath.Walk(root, func(path string, f os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
-		// Rebase path
-		path, err = filepath.Rel(root, path)
-		if err != nil {
-			return err
-		}
-
-		path = filepath.Join(string(os.PathSeparator), path)
-
-		// Skip root
-		if path == string(os.PathSeparator) {
-			return nil
-		}
-
-		p := &currentPath{
-			path:     path,
-			f:        f,
-			fullPath: filepath.Join(root, path),
-		}
-
-		select {
-		case <-ctx.Done():
-			return ctx.Err()
-		case pathC <- p:
-			return nil
-		}
-	})
-}
-
-func nextPath(ctx context.Context, pathC <-chan *currentPath) (*currentPath, error) {
-	select {
-	case <-ctx.Done():
-		return nil, ctx.Err()
-	case p := <-pathC:
-		return p, nil
-	}
-}
-
-// RootPath joins a path with a root, evaluating and bounding any
-// symlink to the root directory.
-func RootPath(root, path string) (string, error) {
-	if path == "" {
-		return root, nil
-	}
-	var linksWalked int // to protect against cycles
-	for {
-		i := linksWalked
-		newpath, err := walkLinks(root, path, &linksWalked)
-		if err != nil {
-			return "", err
-		}
-		path = newpath
-		if i == linksWalked {
-			newpath = filepath.Join("/", newpath)
-			if path == newpath {
-				return filepath.Join(root, newpath), nil
-			}
-			path = newpath
-		}
-	}
-}
-
-func walkLink(root, path string, linksWalked *int) (newpath string, islink bool, err error) {
-	if *linksWalked > 255 {
-		return "", false, errTooManyLinks
-	}
-
-	path = filepath.Join("/", path)
-	if path == "/" {
-		return path, false, nil
-	}
-	realPath := filepath.Join(root, path)
-
-	fi, err := os.Lstat(realPath)
-	if err != nil {
-		// If path does not yet exist, treat as non-symlink
-		if os.IsNotExist(err) {
-			return path, false, nil
-		}
-		return "", false, err
-	}
-	if fi.Mode()&os.ModeSymlink == 0 {
-		return path, false, nil
-	}
-	newpath, err = os.Readlink(realPath)
-	if err != nil {
-		return "", false, err
-	}
-	*linksWalked++
-	return newpath, true, nil
-}
-
-func walkLinks(root, path string, linksWalked *int) (string, error) {
-	switch dir, file := filepath.Split(path); {
-	case dir == "":
-		newpath, _, err := walkLink(root, file, linksWalked)
-		return newpath, err
-	case file == "":
-		if os.IsPathSeparator(dir[len(dir)-1]) {
-			if dir == "/" {
-				return dir, nil
-			}
-			return walkLinks(root, dir[:len(dir)-1], linksWalked)
-		}
-		newpath, _, err := walkLink(root, dir, linksWalked)
-		return newpath, err
-	default:
-		newdir, err := walkLinks(root, dir, linksWalked)
-		if err != nil {
-			return "", err
-		}
-		newpath, islink, err := walkLink(root, filepath.Join(newdir, file), linksWalked)
-		if err != nil {
-			return "", err
-		}
-		if !islink {
-			return newpath, nil
-		}
-		if filepath.IsAbs(newpath) {
-			return newpath, nil
-		}
-		return filepath.Join(newdir, newpath), nil
-	}
-}
diff --git a/vendor/github.com/containerd/continuity/fs/stat_darwinfreebsd.go b/vendor/github.com/containerd/continuity/fs/stat_darwinfreebsd.go
deleted file mode 100644
index cb7400a33..000000000
--- a/vendor/github.com/containerd/continuity/fs/stat_darwinfreebsd.go
+++ /dev/null
@@ -1,44 +0,0 @@
-// +build darwin freebsd
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"syscall"
-	"time"
-)
-
-// StatAtime returns the access time from a stat struct
-func StatAtime(st *syscall.Stat_t) syscall.Timespec {
-	return st.Atimespec
-}
-
-// StatCtime returns the created time from a stat struct
-func StatCtime(st *syscall.Stat_t) syscall.Timespec {
-	return st.Ctimespec
-}
-
-// StatMtime returns the modified time from a stat struct
-func StatMtime(st *syscall.Stat_t) syscall.Timespec {
-	return st.Mtimespec
-}
-
-// StatATimeAsTime returns the access time as a time.Time
-func StatATimeAsTime(st *syscall.Stat_t) time.Time {
-	return time.Unix(int64(st.Atimespec.Sec), int64(st.Atimespec.Nsec)) // nolint: unconvert
-}
diff --git a/vendor/github.com/containerd/continuity/fs/stat_linuxopenbsd.go b/vendor/github.com/containerd/continuity/fs/stat_linuxopenbsd.go
deleted file mode 100644
index c68df6e58..000000000
--- a/vendor/github.com/containerd/continuity/fs/stat_linuxopenbsd.go
+++ /dev/null
@@ -1,45 +0,0 @@
-// +build linux openbsd
-
-/*
-   Copyright The containerd 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 fs
-
-import (
-	"syscall"
-	"time"
-)
-
-// StatAtime returns the Atim
-func StatAtime(st *syscall.Stat_t) syscall.Timespec {
-	return st.Atim
-}
-
-// StatCtime returns the Ctim
-func StatCtime(st *syscall.Stat_t) syscall.Timespec {
-	return st.Ctim
-}
-
-// StatMtime returns the Mtim
-func StatMtime(st *syscall.Stat_t) syscall.Timespec {
-	return st.Mtim
-}
-
-// StatATimeAsTime returns st.Atim as a time.Time
-func StatATimeAsTime(st *syscall.Stat_t) time.Time {
-	// The int64 conversions ensure the line compiles for 32-bit systems as well.
-	return time.Unix(int64(st.Atim.Sec), int64(st.Atim.Nsec)) // nolint: unconvert
-}
diff --git a/vendor/github.com/containerd/continuity/fs/time.go b/vendor/github.com/containerd/continuity/fs/time.go
deleted file mode 100644
index cde456123..000000000
--- a/vendor/github.com/containerd/continuity/fs/time.go
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
-   Copyright The containerd 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 fs
-
-import "time"
-
-// Gnu tar and the go tar writer don't have sub-second mtime
-// precision, which is problematic when we apply changes via tar
-// files, we handle this by comparing for exact times, *or* same
-// second count and either a or b having exactly 0 nanoseconds
-func sameFsTime(a, b time.Time) bool {
-	return a == b ||
-		(a.Unix() == b.Unix() &&
-			(a.Nanosecond() == 0 || b.Nanosecond() == 0))
-}