Unified Volume Mounts (#9)

* initial api for unified mounts

* update protobuf to better preserve compat

Author: azenla

protect/control/v1/common.proto

@@ -357,15 +357,15 @@ message WorkloadBlockDeviceStatus {
 }
 
 message WorkloadMountInfo {
-  uint64 device_id = 1;
   string tag = 2;
-  string host_directory = 3;
-  string host_file = 4;
+  string host_path = 3;
   string target_path = 5;
+  reserved 1, 4;
 }
 
 message WorkloadMountStatus {
-  repeated WorkloadMountInfo devices = 1;
+  repeated WorkloadMountInfo mounts = 2;
+  reserved 1;
 }
 
 message WorkloadExitStatus {
@@ -490,6 +490,7 @@ message ZoneScratchDiskSpecStaticBlock {
 
 message ZoneDeviceStatus {
   repeated ZoneDiskStatus disks = 1;
+  ZoneMountStatus mount = 2;
 }
 
 enum ZoneDiskStatusDiskPurpose {
@@ -507,6 +508,12 @@ message ZoneDiskStatus {
   bool delete = 6;
 }
 
+message ZoneMountStatus {
+  uint64 device_id = 1;
+  string host_path = 2;
+  string tag = 3;
+}
+
 message OciRegistryUsernamePassword {
   // username to provide, empty means no username.
   string username = 1;