types: Make FS sharing disable by default

All the other caps are inverted (not supported by default).

Make fs sharing not supported by default and let hypervisors
expose if it supports it.

Signed-off-by: Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>

virtcontainers/acrn_arch_base.go

@@ -360,8 +360,6 @@ func (a *acrnArchBase) memoryTopology(memoryMb uint64) Memory {
 func (a *acrnArchBase) capabilities() types.Capabilities {
 	var caps types.Capabilities
 
-	// For devicemapper disable support for filesystem sharing
-	caps.SetFsSharingUnsupported()
 	caps.SetBlockDeviceSupport()
 	caps.SetBlockDeviceHotplugSupport()
 

virtcontainers/fc.go

@@ -1065,7 +1065,6 @@ func (fc *firecracker) capabilities() types.Capabilities {
 	span, _ := fc.trace("capabilities")
 	defer span.Finish()
 	var caps types.Capabilities
-	caps.SetFsSharingUnsupported()
 	caps.SetBlockDeviceHotplugSupport()
 
 	return caps

virtcontainers/qemu_amd64.go

@@ -119,6 +119,7 @@ func (q *qemuAmd64) capabilities() types.Capabilities {
 	}
 
 	caps.SetMultiQueueSupport()
+	caps.SetFsSharingSupport()
 
 	return caps
 }

virtcontainers/qemu_arch_base.go

@@ -271,6 +271,7 @@ func (q *qemuArchBase) capabilities() types.Capabilities {
 	var caps types.Capabilities
 	caps.SetBlockDeviceHotplugSupport()
 	caps.SetMultiQueueSupport()
+	caps.SetFsSharingSupport()
 	return caps
 }
 

virtcontainers/types/capabilities.go

@@ -9,7 +9,7 @@ const (
 	blockDeviceSupport = 1 << iota
 	blockDeviceHotplugSupport
 	multiQueueSupport
-	fsSharingUnsupported
+	fsSharingSupported
 )
 
 // Capabilities describe a virtcontainers hypervisor capabilities
@@ -50,10 +50,10 @@ func (caps *Capabilities) SetMultiQueueSupport() {
 
 // IsFsSharingSupported tells if an hypervisor supports host filesystem sharing.
 func (caps *Capabilities) IsFsSharingSupported() bool {
-	return caps.flags&fsSharingUnsupported == 0
+	return caps.flags&fsSharingSupported != 0
 }
 
 // SetFsSharingUnsupported sets the host filesystem sharing capability to true.
-func (caps *Capabilities) SetFsSharingUnsupported() {
-	caps.flags |= fsSharingUnsupported
+func (caps *Capabilities) SetFsSharingSupport() {
+	caps.flags |= fsSharingSupported
 }

virtcontainers/types/capabilities_test.go

@@ -30,7 +30,7 @@ func TestBlockDeviceHotplugCapability(t *testing.T) {
 func TestFsSharingCapability(t *testing.T) {
 	var caps Capabilities
 
-	assert.True(t, caps.IsFsSharingSupported())
-	caps.SetFsSharingUnsupported()
 	assert.False(t, caps.IsFsSharingSupported())
+	caps.SetFsSharingSupport()
+	assert.True(t, caps.IsFsSharingSupported())
 }