5 files changed, 3 insertions, 60 deletions

diff --git a/runsc/boot/fs.go b/runsc/boot/fs.go
index e1181271a..9cd4f97da 100644
--- a/runsc/boot/fs.go
+++ b/runsc/boot/fs.go
@@ -221,9 +221,6 @@ func mountFlags(opts []string) fs.MountSourceFlags {
 			mf.NoAtime = true
 		case "noexec":
 			mf.NoExec = true
-		case "bind", "rbind":
-			// When options include either "bind" or "rbind",
-			// it's converted to a 9P mount.
 		default:
 			log.Warningf("ignoring unknown mount option %q", o)
 		}
@@ -770,10 +767,6 @@ func (c *containerMounter) getMountNameAndOptions(conf *Config, m specs.Mount) (
 		useOverlay bool
 	)
 
-	if isBindMount(m) {
-		m.Type = bind
-	}
-
 	switch m.Type {
 	case devpts.Name, devtmpfs.Name, procvfs2.Name, sysvfs2.Name:
 		fsName = m.Type
@@ -801,18 +794,6 @@ func (c *containerMounter) getMountNameAndOptions(conf *Config, m specs.Mount) (
 	return fsName, opts, useOverlay, nil
 }
 
-func isBindMount(m specs.Mount) bool {
-	for _, opt := range m.Options {
-		// When options include either "bind" or "rbind", this behaves as
-		// bind mount even if the mount type is equal to a filesystem supported
-		// on runsc.
-		if opt == "bind" || opt == "rbind" {
-			return true
-		}
-	}
-	return false
-}
-
 func (c *containerMounter) getMountAccessType(mount specs.Mount) FileAccessType {
 	if hint := c.hints.findMount(mount); hint != nil {
 		return hint.fileAccessType()
diff --git a/runsc/boot/vfs.go b/runsc/boot/vfs.go
index 147c901c4..fefeeff58 100644
--- a/runsc/boot/vfs.go
+++ b/runsc/boot/vfs.go
@@ -235,7 +235,7 @@ func (c *containerMounter) prepareMountsVFS2() ([]mountAndFD, error) {
 		fd := -1
 		// Only bind mounts use host FDs; see
 		// containerMounter.getMountNameAndOptionsVFS2.
-		if m.Type == bind || isBindMount(m) {
+		if m.Type == bind {
 			fd = c.fds.remove()
 		}
 		mounts = append(mounts, mountAndFD{
@@ -305,10 +305,6 @@ func (c *containerMounter) getMountNameAndOptionsVFS2(conf *Config, m *mountAndF
 		useOverlay bool
 	)
 
-	if isBindMount(m.Mount) {
-		m.Type = bind
-	}
-
 	switch m.Type {
 	case devpts.Name, devtmpfs.Name, proc.Name, sys.Name:
 		fsName = m.Type
diff --git a/runsc/container/container_test.go b/runsc/container/container_test.go
index 1a6d50d0d..d59a1d97e 100644
--- a/runsc/container/container_test.go
+++ b/runsc/container/container_test.go
@@ -1537,28 +1537,6 @@ func TestReadonlyMount(t *testing.T) {
 	}
 }
 
-func TestBindMountByOption(t *testing.T) {
-	for _, conf := range configs(t, overlay) {
-		t.Logf("Running test with conf: %+v", conf)
-
-		dir, err := ioutil.TempDir(testutil.TmpDir(), "bind-mount")
-		spec := testutil.NewSpecWithArgs("/bin/touch", path.Join(dir, "file"))
-		if err != nil {
-			t.Fatalf("ioutil.TempDir() failed: %v", err)
-		}
-		spec.Mounts = append(spec.Mounts, specs.Mount{
-			Destination: dir,
-			Source:      dir,
-			Type:        "none",
-			Options:     []string{"rw", "bind"},
-		})
-
-		if err := run(spec, conf); err != nil {
-			t.Fatalf("error running sandbox: %v", err)
-		}
-	}
-}
-
 // TestAbbreviatedIDs checks that runsc supports using abbreviated container
 // IDs in place of full IDs.
 func TestAbbreviatedIDs(t *testing.T) {
diff --git a/runsc/container/multi_container_test.go b/runsc/container/multi_container_test.go
index f6861b1dd..e3704b453 100644
--- a/runsc/container/multi_container_test.go
+++ b/runsc/container/multi_container_test.go
@@ -1394,7 +1394,7 @@ func TestMultiContainerSharedMountUnsupportedOptions(t *testing.T) {
 		Destination: "/mydir/test",
 		Source:      "/some/dir",
 		Type:        "tmpfs",
-		Options:     []string{"rw", "relatime"},
+		Options:     []string{"rw", "rbind", "relatime"},
 	}
 	podSpec[0].Mounts = append(podSpec[0].Mounts, mnt0)
 
diff --git a/runsc/specutils/specutils.go b/runsc/specutils/specutils.go
index 202518b58..837d5e238 100644
--- a/runsc/specutils/specutils.go
+++ b/runsc/specutils/specutils.go
@@ -311,19 +311,7 @@ func capsFromNames(names []string, skipSet map[linux.Capability]struct{}) (auth.
 
 // Is9PMount returns true if the given mount can be mounted as an external gofer.
 func Is9PMount(m specs.Mount) bool {
-	var isBind bool
-	switch m.Type {
-	case "bind":
-		isBind = true
-	default:
-		for _, opt := range m.Options {
-			if opt == "bind" || opt == "rbind" {
-				isBind = true
-				break
-			}
-		}
-	}
-	return isBind && m.Source != "" && IsSupportedDevMount(m)
+	return m.Type == "bind" && m.Source != "" && IsSupportedDevMount(m)
 }
 
 // IsSupportedDevMount returns true if the mount is a supported /dev mount.