// Copyright 2022 The ChromiumOS Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto3";

option optimize_for = LITE_RUNTIME;

package lvmd;
option go_package = "go.chromium.org/chromiumos/system_api/lvmd_proto";

// Encapsulates information about an LVM physical volume.
message PhysicalVolume {
  string device_path = 1;
}

// Encapsulates information about an LVM volume group.
message VolumeGroup {
  string name = 1;
}

// Encapsulates information about an LVM thinpool.
message Thinpool {
  VolumeGroup volume_group = 1;
  string name = 2;
  int64 total_bytes = 3;
  int64 free_bytes = 4;
}

// Encapsulates logical volume configuration information.
message LogicalVolumeConfiguration {
  string name = 1;

  // Size is in MiB.
  int64 size = 2;
}

// Encapsulates the request into CreateLogicalVolumes API.
message CreateLogicalVolumesRequest {
  // Encapsulates the info needed to create a single logical volume.
  message LogicalVolumeInfo {
    Thinpool thinpool = 1;
    LogicalVolumeConfiguration lv_config = 2;
  }
  repeated LogicalVolumeInfo logical_volume_infos = 1;
}

// Encapsulates the response from CreateLogicalVolumes API.
// Note: Use a proto in case response need to be expanded/tweaked without
// breaking callers of the API.
message CreateLogicalVolumesResponse {
  LogicalVolumeList logical_volume_list = 1;
}

// Encapsulates the request into RemoveLogicalVolumes API.
message RemoveLogicalVolumesRequest {
  LogicalVolumeList logical_volume_list = 1;
}

// Encapsulates the response from  RemoveLogicalVolumes API.
// Note: Use a proto in case response need to be expanded/tweaked without
// breaking callers of the API.
message RemoveLogicalVolumesResponse {
  LogicalVolumeList logical_volume_list = 1;
}

// Encapsulates information about an LVM logical volume.
message LogicalVolume {
  VolumeGroup volume_group = 1;
  string name = 2;
  string path = 3;

  // Size in MiB, or -1 for error.
  int64 size = 4;
}

// Holds a list of LVM logical volumes.
message LogicalVolumeList {
  repeated LogicalVolume logical_volume = 1;
}