kata-env: add SharedFS option to output

It's useful to know whether virtio-9p or virtio-fs is being used.  Add
the status to the kata-env output.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

cli/kata-env.go

@@ -92,6 +92,7 @@ type HypervisorInfo struct {
 	MemorySlots       uint32
 	Debug             bool
 	UseVSock          bool
+	SharedFS          string
 }
 
 // ProxyInfo stores proxy details
@@ -352,6 +353,7 @@ func getHypervisorInfo(config oci.RuntimeConfig) HypervisorInfo {
 		UseVSock:          config.HypervisorConfig.UseVSock,
 		MemorySlots:       config.HypervisorConfig.MemSlots,
 		EntropySource:     config.HypervisorConfig.EntropySource,
+		SharedFS:          config.HypervisorConfig.SharedFS,
 	}
 }
 

cli/kata-env_test.go

@@ -37,6 +37,7 @@ const testHypervisorVersion = "QEMU emulator version 2.7.0+git.741f430a96-6.1, C
 
 var (
 	hypervisorDebug = false
+	enableVirtioFS  = false
 	proxyDebug      = false
 	runtimeDebug    = false
 	runtimeTrace    = false
@@ -91,6 +92,7 @@ func makeRuntimeConfig(prefixDir string) (configFile string, config oci.RuntimeC
 	enableIOThreads := true
 	hotplugVFIOOnRootBus := true
 	disableNewNetNs := false
+	sharedFS := "virtio-9p"
 
 	filesToCreate := []string{
 		hypervisorPath,
@@ -126,6 +128,10 @@ func makeRuntimeConfig(prefixDir string) (configFile string, config oci.RuntimeC
 		return "", oci.RuntimeConfig{}, err
 	}
 
+	if enableVirtioFS {
+		sharedFS = "virtio-fs"
+	}
+
 	hypConfig := katautils.GetDefaultHypervisorConfig()
 
 	configFileOptions := katatestutils.RuntimeConfigOptions{
@@ -157,6 +163,7 @@ func makeRuntimeConfig(prefixDir string) (configFile string, config oci.RuntimeC
 		NetmonDebug:          netmonDebug,
 		AgentDebug:           agentDebug,
 		AgentTrace:           agentTrace,
+		SharedFS:             sharedFS,
 	}
 
 	runtimeConfig := katatestutils.MakeRuntimeConfigFileData(configFileOptions)
@@ -321,6 +328,7 @@ func getExpectedHypervisor(config oci.RuntimeConfig) HypervisorInfo {
 		MemorySlots:       config.HypervisorConfig.MemSlots,
 		Debug:             config.HypervisorConfig.Debug,
 		EntropySource:     config.HypervisorConfig.EntropySource,
+		SharedFS:          config.HypervisorConfig.SharedFS,
 	}
 }
 
@@ -498,6 +506,7 @@ func TestEnvGetEnvInfo(t *testing.T) {
 	// options are tested.
 	for _, toggle := range []bool{false, true} {
 		hypervisorDebug = toggle
+		enableVirtioFS = toggle
 		proxyDebug = toggle
 		runtimeDebug = toggle
 		runtimeTrace = toggle

pkg/katatestutils/utils.go

@@ -27,6 +27,7 @@ type RuntimeConfigOptions struct {
 	BlockDeviceDriver    string
 	AgentTraceMode       string
 	AgentTraceType       string
+	SharedFS             string
 	DisableBlock         bool
 	EnableIOThreads      bool
 	HotplugVFIOOnRootBus bool
@@ -61,6 +62,8 @@ func MakeRuntimeConfigFileData(config RuntimeConfigOptions) string {
 	msize_9p = ` + strconv.FormatUint(uint64(config.DefaultMsize9p), 10) + `
 	enable_debug = ` + strconv.FormatBool(config.HypervisorDebug) + `
 	guest_hook_path = "` + config.DefaultGuestHookPath + `"
+	shared_fs = "` + config.SharedFS + `"
+	virtio_fs_daemon = "/path/to/virtiofsd"
 
 	[proxy.kata]
 	enable_debug = ` + strconv.FormatBool(config.ProxyDebug) + `

pkg/katautils/config_test.go

@@ -83,6 +83,7 @@ func createAllRuntimeConfigFiles(dir, hypervisor string) (config testRuntimeConf
 	enableIOThreads := true
 	hotplugVFIOOnRootBus := true
 	disableNewNetNs := false
+	sharedFS := "virtio-9p"
 
 	configFileOptions := katatestutils.RuntimeConfigOptions{
 		Hypervisor:           "qemu",
@@ -113,6 +114,7 @@ func createAllRuntimeConfigFiles(dir, hypervisor string) (config testRuntimeConf
 		NetmonDebug:          netmonDebug,
 		AgentDebug:           agentDebug,
 		AgentTrace:           agentTrace,
+		SharedFS:             sharedFS,
 	}
 
 	runtimeConfigFileData := katatestutils.MakeRuntimeConfigFileData(configFileOptions)
@@ -160,6 +162,8 @@ func createAllRuntimeConfigFiles(dir, hypervisor string) (config testRuntimeConf
 		MemSlots:              defaultMemSlots,
 		EntropySource:         defaultEntropySource,
 		GuestHookPath:         defaultGuestHookPath,
+		SharedFS:              sharedFS,
+		VirtioFSDaemon:        "/path/to/virtiofsd",
 	}
 
 	agentConfig := vc.KataAgentConfig{}