Merge pull request #44055 from thaJeztah/22.06_backport_migrate_sequential

[22.06 backport] replace pkg/system Sequential funcs with moby/sys/sequential

image/tarexport/load.go

@@ -20,6 +20,7 @@ import (
 	"github.com/docker/docker/pkg/streamformatter"
 	"github.com/docker/docker/pkg/stringid"
 	"github.com/docker/docker/pkg/system"
+	"github.com/moby/sys/sequential"
 	"github.com/moby/sys/symlink"
 	"github.com/opencontainers/go-digest"
 	"github.com/sirupsen/logrus"
@@ -168,9 +169,9 @@ func (l *tarexporter) setParentID(id, parentID image.ID) error {
 }
 
 func (l *tarexporter) loadLayer(filename string, rootFS image.RootFS, id string, foreignSrc distribution.Descriptor, progressOutput progress.Output) (layer.Layer, error) {
-	// We use system.OpenSequential to use sequential file access on Windows, avoiding
-	// depleting the standby list. On Linux, this equates to a regular os.Open.
-	rawTar, err := system.OpenSequential(filename)
+	// We use sequential file access to avoid depleting the standby list on Windows.
+	// On Linux, this equates to a regular os.Open.
+	rawTar, err := sequential.Open(filename)
 	if err != nil {
 		logrus.Debugf("Error reading embedded tar: %v", err)
 		return nil, err

image/tarexport/save.go

@@ -16,6 +16,7 @@ import (
 	"github.com/docker/docker/layer"
 	"github.com/docker/docker/pkg/archive"
 	"github.com/docker/docker/pkg/system"
+	"github.com/moby/sys/sequential"
 	"github.com/opencontainers/go-digest"
 	"github.com/pkg/errors"
 )
@@ -377,10 +378,9 @@ func (s *saveSession) saveLayer(id layer.ChainID, legacyImg image.V1Image, creat
 			return distribution.Descriptor{}, errors.Wrap(err, "error creating symlink while saving layer")
 		}
 	} else {
-		// Use system.CreateSequential rather than os.Create. This ensures sequential
-		// file access on Windows to avoid eating into MM standby list.
-		// On Linux, this equates to a regular os.Create.
-		tarFile, err := system.CreateSequential(layerPath)
+		// We use sequential file access to avoid depleting the standby list on
+		// Windows. On Linux, this equates to a regular os.Create.
+		tarFile, err := sequential.Create(layerPath)
 		if err != nil {
 			return distribution.Descriptor{}, err
 		}

pkg/archive/archive.go

@@ -25,6 +25,7 @@ import (
 	"github.com/docker/docker/pkg/pools"
 	"github.com/docker/docker/pkg/system"
 	"github.com/klauspost/compress/zstd"
+	"github.com/moby/sys/sequential"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	exec "golang.org/x/sys/execabs"
@@ -660,10 +661,9 @@ func (ta *tarAppender) addTarFile(path, name string) error {
 	}
 
 	if hdr.Typeflag == tar.TypeReg && hdr.Size > 0 {
-		// We use system.OpenSequential to ensure we use sequential file
-		// access on Windows to avoid depleting the standby list.
-		// On Linux, this equates to a regular os.Open.
-		file, err := system.OpenSequential(path)
+		// We use sequential file access to avoid depleting the standby list on
+		// Windows. On Linux, this equates to a regular os.Open.
+		file, err := sequential.Open(path)
 		if err != nil {
 			return err
 		}
@@ -701,10 +701,9 @@ func createTarFile(path, extractDir string, hdr *tar.Header, reader io.Reader, L
 		}
 
 	case tar.TypeReg, tar.TypeRegA:
-		// Source is regular file. We use system.OpenFileSequential to use sequential
-		// file access to avoid depleting the standby list on Windows.
-		// On Linux, this equates to a regular os.OpenFile
-		file, err := system.OpenFileSequential(path, os.O_CREATE|os.O_WRONLY, hdrInfo.Mode())
+		// Source is regular file. We use sequential file access to avoid depleting
+		// the standby list on Windows. On Linux, this equates to a regular os.OpenFile.
+		file, err := sequential.OpenFile(path, os.O_CREATE|os.O_WRONLY, hdrInfo.Mode())
 		if err != nil {
 			return err
 		}

pkg/system/filesys.go

@@ -0,0 +1,19 @@
+package system
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// IsAbs is a platform-agnostic wrapper for filepath.IsAbs.
+//
+// On Windows, golang filepath.IsAbs does not consider a path \windows\system32
+// as absolute as it doesn't start with a drive-letter/colon combination. However,
+// in docker we need to verify things such as WORKDIR /windows/system32 in
+// a Dockerfile (which gets translated to \windows\system32 when being processed
+// by the daemon). This SHOULD be treated as absolute from a docker processing
+// perspective.
+func IsAbs(path string) bool {
+	return filepath.IsAbs(path) || strings.HasPrefix(path, string(os.PathSeparator))
+}

pkg/system/filesys_deprecated.go

@@ -0,0 +1,35 @@
+package system
+
+import (
+	"os"
+
+	"github.com/moby/sys/sequential"
+)
+
+// CreateSequential is deprecated.
+//
+// Deprecated: use os.Create or github.com/moby/sys/sequential.Create()
+func CreateSequential(name string) (*os.File, error) {
+	return sequential.Create(name)
+}
+
+// OpenSequential is deprecated.
+//
+// Deprecated: use os.Open or github.com/moby/sys/sequential.Open
+func OpenSequential(name string) (*os.File, error) {
+	return sequential.Open(name)
+}
+
+// OpenFileSequential is deprecated.
+//
+// Deprecated: use github.com/moby/sys/sequential.OpenFile()
+func OpenFileSequential(name string, flag int, perm os.FileMode) (*os.File, error) {
+	return sequential.OpenFile(name, flag, perm)
+}
+
+// TempFileSequential is deprecated.
+//
+// Deprecated: use os.CreateTemp or github.com/moby/sys/sequential.CreateTemp
+func TempFileSequential(dir, prefix string) (f *os.File, err error) {
+	return sequential.CreateTemp(dir, prefix)
+}

pkg/system/filesys_unix.go

@@ -3,10 +3,7 @@
 
 package system // import "github.com/docker/docker/pkg/system"
 
-import (
-	"os"
-	"path/filepath"
-)
+import "os"
 
 // MkdirAllWithACL is a wrapper for os.MkdirAll on unix systems.
 func MkdirAllWithACL(path string, perm os.FileMode, sddl string) error {
@@ -18,50 +15,3 @@ func MkdirAllWithACL(path string, perm os.FileMode, sddl string) error {
 func MkdirAll(path string, perm os.FileMode) error {
 	return os.MkdirAll(path, perm)
 }
-
-// IsAbs is a platform-specific wrapper for filepath.IsAbs.
-func IsAbs(path string) bool {
-	return filepath.IsAbs(path)
-}
-
-// The functions below here are wrappers for the equivalents in the os and ioutils packages.
-// They are passthrough on Unix platforms, and only relevant on Windows.
-
-// CreateSequential 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 CreateSequential(name string) (*os.File, error) {
-	return os.Create(name)
-}
-
-// OpenSequential 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 OpenSequential(name string) (*os.File, error) {
-	return os.Open(name)
-}
-
-// OpenFileSequential 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 OpenFileSequential(name string, flag int, perm os.FileMode) (*os.File, error) {
-	return os.OpenFile(name, flag, perm)
-}
-
-// TempFileSequential 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 TempFileSequential(dir, prefix string) (f *os.File, err error) {
-	return os.CreateTemp(dir, prefix)
-}

pkg/system/filesys_windows.go

@@ -2,13 +2,8 @@ package system // import "github.com/docker/docker/pkg/system"
 
 import (
 	"os"
-	"path/filepath"
 	"regexp"
-	"strconv"
-	"strings"
-	"sync"
 	"syscall"
-	"time"
 	"unsafe"
 
 	"golang.org/x/sys/windows"
@@ -121,172 +116,3 @@ func mkdirWithACL(name string, sddl string) error {
 	}
 	return nil
 }
-
-// IsAbs is a platform-specific wrapper for filepath.IsAbs. On Windows,
-// golang filepath.IsAbs does not consider a path \windows\system32 as absolute
-// as it doesn't start with a drive-letter/colon combination. However, in
-// docker we need to verify things such as WORKDIR /windows/system32 in
-// a Dockerfile (which gets translated to \windows\system32 when being processed
-// by the daemon. This SHOULD be treated as absolute from a docker processing
-// perspective.
-func IsAbs(path string) bool {
-	if filepath.IsAbs(path) || strings.HasPrefix(path, string(os.PathSeparator)) {
-		return true
-	}
-	return false
-}
-
-// The origin of the functions below here 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.
-
-// CreateSequential 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 CreateSequential(name string) (*os.File, error) {
-	return OpenFileSequential(name, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0)
-}
-
-// OpenSequential 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 OpenSequential(name string) (*os.File, error) {
-	return OpenFileSequential(name, os.O_RDONLY, 0)
-}
-
-// OpenFileSequential 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 OpenFileSequential(name string, flag int, _ os.FileMode) (*os.File, error) {
-	if name == "" {
-		return nil, &os.PathError{Op: "open", Path: name, Err: syscall.ENOENT}
-	}
-	r, errf := windowsOpenFileSequential(name, flag, 0)
-	if errf == nil {
-		return r, nil
-	}
-	return nil, &os.PathError{Op: "open", Path: name, Err: errf}
-}
-
-func windowsOpenFileSequential(name string, flag int, _ os.FileMode) (file *os.File, err error) {
-	r, e := windowsOpenSequential(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 windowsOpenSequential(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 TempFileSequential
-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:]
-}
-
-// TempFileSequential 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 TempFileSequential(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 = OpenFileSequential(name, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
-		if os.IsExist(err) {
-			if nconflict++; nconflict > 10 {
-				randmu.Lock()
-				rand = reseed()
-				randmu.Unlock()
-			}
-			continue
-		}
-		break
-	}
-	return
-}

vendor.mod

@@ -55,6 +55,7 @@ require (
 	github.com/moby/swarmkit/v2 v2.0.0-20220721174824-48dd89375d0a
 	github.com/moby/sys/mount v0.3.3
 	github.com/moby/sys/mountinfo v0.6.2
+	github.com/moby/sys/sequential v0.0.0-20220829095930-b22ba8a69b30
 	github.com/moby/sys/signal v0.7.0
 	github.com/moby/sys/symlink v0.2.0
 	github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6

vendor.sum

@@ -770,6 +770,8 @@ github.com/moby/sys/mountinfo v0.5.0/go.mod h1:3bMD3Rg+zkqx8MRYPi7Pyb0Ie97QEBmdx
 github.com/moby/sys/mountinfo v0.6.0/go.mod h1:3bMD3Rg+zkqx8MRYPi7Pyb0Ie97QEBmdxbhnCLlSvSU=
 github.com/moby/sys/mountinfo v0.6.2 h1:BzJjoreD5BMFNmD9Rus6gdd1pLuecOFPt8wC+Vygl78=
 github.com/moby/sys/mountinfo v0.6.2/go.mod h1:IJb6JQeOklcdMU9F5xQ8ZALD+CUr5VlGpwtX+VE0rpI=
+github.com/moby/sys/sequential v0.0.0-20220829095930-b22ba8a69b30 h1:LIL30sRWu2XhxsKr+Ek68J1zeaRatA+fv4UgX82P1+g=
+github.com/moby/sys/sequential v0.0.0-20220829095930-b22ba8a69b30/go.mod h1:tH2cOOs5V9MlPiXcQzRC+eEyab644PWKGRYaaV5ZZlo=
 github.com/moby/sys/signal v0.6.0/go.mod h1:GQ6ObYZfqacOwTtlXvcmh9A26dVRul/hbOZn88Kg8Tg=
 github.com/moby/sys/signal v0.7.0 h1:25RW3d5TnQEoKvRbEKUGay6DCQ46IxAVTT9CUMgmsSI=
 github.com/moby/sys/signal v0.7.0/go.mod h1:GQ6ObYZfqacOwTtlXvcmh9A26dVRul/hbOZn88Kg8Tg=

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

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   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.

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/modules.txt

@@ -667,6 +667,9 @@ github.com/moby/sys/mount
 # github.com/moby/sys/mountinfo v0.6.2
 ## explicit; go 1.16
 github.com/moby/sys/mountinfo
+# github.com/moby/sys/sequential v0.0.0-20220829095930-b22ba8a69b30
+## explicit; go 1.17
+github.com/moby/sys/sequential
 # github.com/moby/sys/signal v0.7.0
 ## explicit; go 1.16
 github.com/moby/sys/signal