Merge pull request #135 from thaJeztah/18.09_backport_xattr_fix

[18.09 backport] Ignore xattr ENOTSUP errors on copy (fixes #38155)
Upstream-commit: db7a8cb7ba2de79d68ec73c158571319f82ba212
Component: engine

components/engine/container/container_unix.go

@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"syscall"
 
 	"github.com/containerd/continuity/fs"
 	"github.com/docker/docker/api/types"
@@ -388,6 +389,18 @@ func (container *Container) DetachAndUnmount(volumeEventLog func(name, action st
 	return container.UnmountVolumes(volumeEventLog)
 }
 
+// ignoreUnsupportedXAttrs ignores errors when extended attributes
+// are not supported
+func ignoreUnsupportedXAttrs() fs.CopyDirOpt {
+	xeh := func(dst, src, xattrKey string, err error) error {
+		if errors.Cause(err) != syscall.ENOTSUP {
+			return err
+		}
+		return nil
+	}
+	return fs.WithXAttrErrorHandler(xeh)
+}
+
 // copyExistingContents copies from the source to the destination and
 // ensures the ownership is appropriately set.
 func copyExistingContents(source, destination string) error {
@@ -399,7 +412,7 @@ func copyExistingContents(source, destination string) error {
 		// destination is not empty, do not copy
 		return nil
 	}
-	return fs.CopyDir(destination, source)
+	return fs.CopyDir(destination, source, ignoreUnsupportedXAttrs())
 }
 
 // TmpfsMounts returns the list of tmpfs mounts

components/engine/vendor.conf

@@ -120,7 +120,7 @@ google.golang.org/genproto 694d95ba50e67b2e363f3483057db5d4910c18f9
 # containerd
 github.com/containerd/containerd 9754871865f7fe2f4e74d43e2fc7ccd237edcbce # v1.2.2
 github.com/containerd/fifo 3d5202aec260678c48179c56f40e6f38a095738c
-github.com/containerd/continuity bd77b46c8352f74eb12c85bdc01f4b90f69d66b4
+github.com/containerd/continuity 004b46473808b3e7a4a3049c20e4376c91eb966d
 github.com/containerd/cgroups 5e610833b72089b37d0e615de9a92dfc043757c2
 github.com/containerd/console c12b1e7919c14469339a5d38f2f8ed9b64a9de23
 github.com/containerd/cri 0d5cabd006cb5319dc965046067b8432d9fa5ef8 # release/1.2 branch