vendor: update buildkit to 8effd45b

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/moby/sys/mount/doc.go

@@ -0,0 +1,4 @@
+// Package mount provides a set of functions to mount and unmount mounts.
+//
+// Currently it supports Linux. For historical reasons, there is also some support for FreeBSD.
+package mount

vendor/github.com/moby/sys/mount/flags_bsd.go

@@ -1,28 +1,25 @@
-// +build freebsd,cgo
+// +build freebsd openbsd
 
 package mount
 
-/*
-#include <sys/mount.h>
-*/
-import "C"
+import "golang.org/x/sys/unix"
 
 const (
 	// RDONLY will mount the filesystem as read-only.
-	RDONLY = C.MNT_RDONLY
+	RDONLY = unix.MNT_RDONLY
 
 	// NOSUID will not allow set-user-identifier or set-group-identifier bits to
 	// take effect.
-	NOSUID = C.MNT_NOSUID
+	NOSUID = unix.MNT_NOSUID
 
 	// NOEXEC will not allow execution of any binaries on the mounted file system.
-	NOEXEC = C.MNT_NOEXEC
+	NOEXEC = unix.MNT_NOEXEC
 
 	// SYNCHRONOUS will allow any I/O to the file system to be done synchronously.
-	SYNCHRONOUS = C.MNT_SYNCHRONOUS
+	SYNCHRONOUS = unix.MNT_SYNCHRONOUS
 
 	// NOATIME will not update the file access time when reading from a file.
-	NOATIME = C.MNT_NOATIME
+	NOATIME = unix.MNT_NOATIME
 )
 
 // These flags are unsupported.

vendor/github.com/moby/sys/mount/flags_unix.go

@@ -1,3 +1,5 @@
+// +build !darwin,!windows
+
 package mount
 
 import (

vendor/github.com/moby/sys/mount/flags_unsupported.go

@@ -1,30 +0,0 @@
-// +build !linux,!freebsd freebsd,!cgo
-
-package mount
-
-// These flags are unsupported.
-const (
-	BIND        = 0
-	DIRSYNC     = 0
-	MANDLOCK    = 0
-	NOATIME     = 0
-	NODEV       = 0
-	NODIRATIME  = 0
-	NOEXEC      = 0
-	NOSUID      = 0
-	UNBINDABLE  = 0
-	RUNBINDABLE = 0
-	PRIVATE     = 0
-	RPRIVATE    = 0
-	SHARED      = 0
-	RSHARED     = 0
-	SLAVE       = 0
-	RSLAVE      = 0
-	RBIND       = 0
-	RELATIME    = 0
-	REMOUNT     = 0
-	STRICTATIME = 0
-	SYNCHRONOUS = 0
-	RDONLY      = 0
-	mntDetach   = 0
-)

vendor/github.com/moby/sys/mount/go.mod

@@ -3,6 +3,6 @@ module github.com/moby/sys/mount
 go 1.14
 
 require (
-	github.com/moby/sys/mountinfo v0.1.0
-	golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae
+	github.com/moby/sys/mountinfo v0.4.0
+	golang.org/x/sys v0.0.0-20200922070232-aee5d888a860
 )

vendor/github.com/moby/sys/mount/go.sum

@@ -1,4 +1,5 @@
-github.com/moby/sys/mountinfo v0.1.0 h1:r8vMRbMAFEAfiNptYVokP+nfxPJzvRuia5e2vzXtENo=
-github.com/moby/sys/mountinfo v0.1.0/go.mod h1:w2t2Avltqx8vE7gX5l+QiBKxODu2TX0+Syr3h52Tw4o=
-golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepxRw6jWvR5iDRdvjHgy8=
-golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+github.com/moby/sys/mountinfo v0.4.0 h1:1KInV3Huv18akCu58V7lzNlt+jFmqlu1EaErnEHE/VM=
+github.com/moby/sys/mountinfo v0.4.0/go.mod h1:rEr8tzG/lsIZHBtN/JjGG+LMYx9eXgW2JI+6q0qou+A=
+golang.org/x/sys v0.0.0-20200909081042-eff7692f9009/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200922070232-aee5d888a860 h1:YEu4SMq7D0cmT7CBbXfcH0NZeuChAXwsHe/9XueUO6o=
+golang.org/x/sys v0.0.0-20200922070232-aee5d888a860/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

vendor/github.com/moby/sys/mount/mount_unix.go

@@ -1,4 +1,4 @@
-// +build go1.13
+// +build !darwin,!windows
 
 package mount
 
@@ -7,6 +7,7 @@ import (
 	"sort"
 
 	"github.com/moby/sys/mountinfo"
+	"golang.org/x/sys/unix"
 )
 
 // Mount will mount filesystem according to the specified configuration.
@@ -18,9 +19,22 @@ func Mount(device, target, mType, options string) error {
 }
 
 // Unmount lazily unmounts a filesystem on supported platforms, otherwise does
-// a normal unmount.  If target is not a mount point, no error is returned.
+// a normal unmount. If target is not a mount point, no error is returned.
 func Unmount(target string) error {
-	return unmount(target, mntDetach)
+	err := unix.Unmount(target, mntDetach)
+	if err == nil || err == unix.EINVAL {
+		// Ignore "not mounted" error here. Note the same error
+		// can be returned if flags are invalid, so this code
+		// assumes that the flags value is always correct.
+		return nil
+	}
+
+	return &mountError{
+		op:     "umount",
+		target: target,
+		flags:  uintptr(mntDetach),
+		err:    err,
+	}
 }
 
 // RecursiveUnmount unmounts the target and all mounts underneath, starting
@@ -32,7 +46,7 @@ func RecursiveUnmount(target string) error {
 	// platforms, if there are submounts, we'll get EBUSY (and fall back
 	// to the slow path). NOTE we do not ignore EINVAL here as target might
 	// not be a mount point itself (but there can be mounts underneath).
-	if err := unmountBare(target, mntDetach); err == nil {
+	if err := unix.Unmount(target, mntDetach); err == nil {
 		return nil
 	}
 
@@ -47,12 +61,18 @@ func RecursiveUnmount(target string) error {
 		return len(mounts[i].Mountpoint) > len(mounts[j].Mountpoint)
 	})
 
-	var suberr error
+	var (
+		suberr    error
+		lastMount = len(mounts) - 1
+	)
 	for i, m := range mounts {
-		err = unmount(m.Mountpoint, mntDetach)
+		err = Unmount(m.Mountpoint)
 		if err != nil {
-			if i == len(mounts)-1 { // last mount
-				return fmt.Errorf("%w (possible cause: %s)", err, suberr)
+			if i == lastMount {
+				if suberr != nil {
+					return fmt.Errorf("%w (possible cause: %s)", err, suberr)
+				}
+				return err
 			}
 			// This is a submount, we can ignore the error for now,
 			// the final unmount will fail if this is a real problem.

vendor/github.com/moby/sys/mount/mounter_bsd.go

@@ -1,3 +1,5 @@
+// +build freebsd,cgo openbsd,cgo
+
 package mount
 
 /*

vendor/github.com/moby/sys/mount/mounter_unsupported.go

@@ -1,7 +1,7 @@
-// +build !linux,!freebsd freebsd,!cgo
+// +build !linux,!freebsd,!openbsd,!windows freebsd,!cgo openbsd,!cgo
 
 package mount
 
 func mount(device, target, mType string, flag uintptr, data string) error {
-	panic("Not implemented")
+	panic("cgo required on freebsd and openbsd")
 }

vendor/github.com/moby/sys/mount/unmount_unix.go

@@ -1,26 +0,0 @@
-// +build !windows
-
-package mount
-
-import "golang.org/x/sys/unix"
-
-func unmountBare(target string, flags int) error {
-	return unix.Unmount(target, flags)
-}
-
-func unmount(target string, flags int) error {
-	err := unmountBare(target, flags)
-	if err == nil || err == unix.EINVAL {
-		// Ignore "not mounted" error here. Note the same error
-		// can be returned if flags are invalid, so this code
-		// assumes that the flags value is always correct.
-		return nil
-	}
-
-	return &mountError{
-		op:     "umount",
-		target: target,
-		flags:  uintptr(flags),
-		err:    err,
-	}
-}

vendor/github.com/moby/sys/mount/unmount_unsupported.go

@@ -1,11 +0,0 @@
-// +build windows
-
-package mount
-
-func unmountBare(_ string, _ int) error {
-	panic("Not implemented")
-}
-
-func unmount(_ string, _ int) error {
-	panic("Not implemented")
-}