dbus/vm_concierge/concierge_service.proto

// Copyright 2017 The Chromium OS Authors. All rights reserved.
// 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;

// This file defines messages used for starting, stopping, and managing VMs.
package vm_tools.concierge;
option go_package = "vm_concierge_proto";

// Specification of the key components of a VM.
//
// TODO(crbug/1121046): This spec may be insufficient for DLC, consider
// re-designing it.
message VirtualMachineSpec {
  // Path to the kernel that should be used for the VM.
  string kernel = 1;

  // Path to the disk image that should be used as the root file system for
  // the VM.
  string rootfs = 2;

  // ID of a DLC package that contains the kernel and rootfs. If this field is
  // set, the kernel() and rootfs() fields will be ignored when calculating the
  // path to the VM's image files.
  string dlc_id = 3;

  // Optional path to the initrd that should be used for the VM.
  string initrd = 4;
}

// The type of disk image.
enum DiskImageType {
  // A raw file.
  DISK_IMAGE_RAW = 0;

  // A qcow2-compatible disk image.
  DISK_IMAGE_QCOW2 = 1;

  // Automatically choose a disk image type.
  DISK_IMAGE_AUTO = 2;

  // A plugin VM disk image.
  DISK_IMAGE_PLUGINVM = 3;
}

// Describes any additional disk images that should be mounted inside the VM.
message DiskImage {
  // Path to the disk image on the host.
  string path = 1;

  // Path where this disk image will be mounted inside the VM.
  string mount_point = 2;

  // The file system type for this disk image.
  string fstype = 3;

  // Any special flags to be used when mounting the file system.  Specified the
  // same way as in mount(2).
  uint64 flags = 4;

  // Any additional data associated with the mount.
  string data = 5;

  // If true, the disk image will be mounted writable.
  bool writable = 6;

  // If true, the disk image will be mounted.
  bool do_mount = 7;

  // Image type of the disk.
  DiskImageType image_type = 8;
}

// Information about a particular VM.
message VmInfo {
  // The IPv4 address assigned to the VM, in network byte order.
  fixed32 ipv4_address = 1;

  // The process ID of the main crosvm process for the VM.
  int32 pid = 2;

  // The virtual socket context id assigned to the VM.
  int64 cid = 3;

  // The handle to a 9p server managed by the seneschal system service.  Use
  // this handle when making requests to that service to manage the files shared
  // with this VM.
  uint32 seneschal_server_handle = 4;

  // Permission token assigned to the VM. Use this token when making requests
  // to the VM permission service to determine what permissions have been
  // granted to the VM. The token is also to be used to identify VM to the
  // service providers (camera, CRAS, etc).
  string permission_token = 5;

  enum VmType {
    // Default value indicating an unknown or custom VM.
    UNKNOWN = 0;

    // VM is associated with a specific feature.
    TERMINA = 1;
    ARC_VM = 2;
    PLUGIN_VM = 3;
  };

  // What type of VM this is.
  VmType vm_type = 6;
}

// Optional fields for network configuration.
message NetworkOptions {
  // Toggles the IFF_VNET_HDR option for the TAP device.
  bool enable_vnet_hdr = 1;
}

// Information that must be included with every StartVm dbus message.
message StartVmRequest {
  // The VM that should be started. This is ignored if starting a termina VM,
  // which will always use the latest component from imageloader.
  VirtualMachineSpec vm = 1;

  // Any additional disks that should be mounted inside the VM.
  repeated DiskImage disks = 2;

  // Path to a shared directory that will be mounted via NFS inside the VM.
  // DEPRECATED: The server never did anything with this field.  Instead callers
  // should use the |shared_dir_handle| field of the VmInfo message to get a
  // server handle that can be used in requests to the seneschal system service.
  string shared_directory = 3 [deprecated = true];

  // The human-readable name to be assigned to this VM.
  string name = 4;

  // If true, concierge should also perform termina-specific setup.
  bool start_termina = 5;

  // The owner of the vm.
  string owner_id = 7;

  // Enable GPU in the started Vm.
  bool enable_gpu = 8;

  // Provide a software-based virtual Trusted Platform Module to the VM. The TPM
  // is backed by libtpm2's TPM simulator and does not interact with any
  // physical TPM on the host device. TPM state does not persist across VM
  // launches. In order for the VM to see the virtual TPM, the guest kernel must
  // contain a virtio TPM driver.
  bool software_tpm = 9;

  // This flag is only respected in developer mode and offers two things -
  // - It can treat a trusted VM as untrusted and run it on insecure host
  // kernels.
  // - It can run an untrusted VM on insecure host kernels.
  bool run_as_untrusted = 10;

  // Enable audio capture in the started Vm.
  bool enable_audio_capture = 11;

  // The number of CPUs to give to the VM.  Cannot be larger than the number of
  // CPUs on the device and cannot be 0.
  uint32 cpus = 12;

  // Make the rootfs writable.
  bool writable_rootfs = 15;

  // If true, a file descriptor must be passed along with the message and that
  // file descriptor will be used for kernel.
  // Ignored unless |start_termina| is true.
  bool use_fd_for_kernel = 13;

  // If true, a file descriptor must be passed along with the message and that
  // file descriptor will be used for rootfs.
  // If |use_fd_for_kernel| is true, the fd for rootfs must be passed after
  // that for kernel.
  // Ignored unless |start_termina| is true.
  bool use_fd_for_rootfs = 14;

  // If true, a file descriptor must be passed along with the message and that
  // file descriptor will be used for storage.
  // If |use_fd_for_kernel| or |use_fd_for_rootfs| is true, the fd for storage
  // must be passed after ones for kernel and rootfs.
  // Ignored unless |start_termina| is true.
  bool use_fd_for_storage = 6;
}

// Information that must be included with every StartPluginVm request.
message StartPluginVmRequest {
  // An identifier for this VM.
  string name = 1;

  // The cryptohome id of the owner of this VM.
  string owner_id = 2;

  // The number of CPUs to give to the VM.  Cannot be larger than the number of
  // CPUs on the device and cannot be 0.
  uint32 cpus = 3;

  // Parameters to pass to the plugin process.
  repeated string params = 4;

  // The IPv4 address to assign to the VM in network-byte order.  Must be in the
  // 100.115.92.128/28 subnet and must not be already assigned to another VM.
  // If unspecified, a /29 subnet will be dynamically allocated
  // from 100.115.93.0/24.
  // Note: this field will be deprecated.
  fixed32 guest_ipv4_address = 5;

  // The EUI-48 MAC address to assign to the host side of the ethernet interface
  // to the VM. Must be exactly 6 bytes and must not be in use by another VM.
  // Must have the locally administered bit (0x02) set and the multicast bit
  // (0x01) unset.
  // If empty, a random MAC address will be generated and assigned.
  // Note: this field will be deprecated.
  bytes host_mac_address = 6;

  // Indicates that a specific /29 subnet should be allocated from
  // 100.115.93.0/24 for use by this VM; and if it is not available, then the
  // request should fail.
  // This field is only used if |guest_ipv4_address| is empty.
  // Valid values are 1 - 32, inclusive.
  uint32 subnet_index = 7;

  // Additional networking options.
  NetworkOptions net_options = 8;
}

// Information that must be included with every StartArcVm request.
message StartArcVmRequest {
  // The VM that should be started.
  VirtualMachineSpec vm = 1;

  // Any additional disks that should be mounted inside the VM.
  repeated DiskImage disks = 2;

  // An identifier for this VM.
  string name = 3;

  // The cryptohome id of the owner of this VM.
  string owner_id = 4;

  // Parameters to pass to the ARCVM's init process.
  repeated string params = 5;

  // Path to Android fstab.
  string fstab = 6;

  // The number of CPUs to give to the VM.  Cannot be larger than the number of
  // CPUs on the device and cannot be 0.
  uint32 cpus = 7;

  // Whether the guest kernel root file system is writable.
  bool rootfs_writable = 8;

  // Ignore development configuration directives when ARCVM is started.
  bool ignore_dev_conf = 9;
}

enum VmStatus {
  // Unknown status.
  VM_STATUS_UNKNOWN = 0;

  // The VM is already running.
  VM_STATUS_RUNNING = 1;

  // The VM is currently starting up.
  VM_STATUS_STARTING = 2;

  // The VM failed to startup.
  VM_STATUS_FAILURE = 3;
}

// Information sent back by vm_concierge in response to a StartVm dbus message.
message StartVmResponse {
  // If true, the VM was started successfully.  |vm_info| will have non-default
  // values only if this is true.
  bool success = 1;

  // If the VM failed to start, the reason for the failure.
  string failure_reason = 2;

  // Information about the VM that was started, if successful.
  VmInfo vm_info = 3;

  // Status of the VM. If VM_STATUS_RUNNING, it is not necessary to wait for a
  // TremplinStartedSignal before starting a container in the VM.
  VmStatus status = 4;

  enum MountResult {
    // The mountability of the disk is unknown, typically because the
    // call failed before trying to mount the disk.
    UNKNOWN = 0;

    // The disk mount succeeded completely.
    SUCCESS = 1;

    // The disk mount succeeded, but some data loss is
    // likely. Currently this occurrs when the initial mount fails,
    // but succeeds on a retry with -o usebackuproots.
    PARTIAL_DATA_LOSS = 2;

    // The disk is unmountable.
    FAILURE = 3;
  }

  MountResult mount_result = 5;
}

// Message used in the signal for when a VM has started.
message VmStartedSignal {
  // The name of the VM which has started.
  string name = 1;

  // The owner of the vm.
  string owner_id = 2;

  // Information about the VM that was started, if successful.
  VmInfo vm_info = 3;

  // Status of the VM. If VM_STATUS_RUNNING, it is not necessary to wait for a
  // TremplinStartedSignal before starting a container in the VM.
  VmStatus status = 4;
}

// Information that must be included with every StopVm dbus message.
message StopVmRequest {
  // The name of the VM to be stopped.
  string name = 1;

  // The owner of the vm.
  string owner_id = 2;
}

// Response sent back by vm_concierge when it receives a StopVm dbus message.
message StopVmResponse {
  // If true, the requested VM was stopped.
  bool success = 1;

  // The failure_reason if the requested VM could not be stopped.
  string failure_reason = 2;
}

// Message used in the signal for when a VM has stopped.
message VmStoppedSignal {
  // The name of the VM which has stopped.
  string name = 1;

  // The owner of the vm.
  string owner_id = 2;

  // The virtual socket context id assigned to the VM that was stopped.
  int64 cid = 3;
}

// Information that must be included with every SuspendVm dbus message.
message SuspendVmRequest {
  // The name of the VM to be stopped.
  string name = 1;

  // The owner of the vm.
  string owner_id = 2;
}

message SuspendVmResponse {
  // If true, the requested VM was suspended.
  bool success = 1;

  // The failure_reason if the requested VM could not be suspended.
  string failure_reason = 2;
}

// Information that must be included with every ResumeVm dbus message.
message ResumeVmRequest {
  // The name of the VM to be stopped.
  string name = 1;

  // The owner of the vm.
  string owner_id = 2;
}

message ResumeVmResponse {
  // If true, the requested VM was suspended.
  bool success = 1;

  // The failure_reason if the requested VM could not be suspended.
  string failure_reason = 2;
}

// Response to a SyncTimes RPC.
message SyncVmTimesResponse {
  // The total number of VMs we attempted to update.
  uint32 requests = 1;
  // Number of failed requests.
  uint32 failures = 2;
  // Reasons for failures, if any.
  repeated string failure_reason = 3;
}

// Request for information about the VM.
message GetVmInfoRequest {
  // The name of the VM to query.
  string name = 1;

  // The owner of the vm.
  string owner_id = 2;
}

// Response sent back by vm_concierge for a GetVmInfo dbus message.
message GetVmInfoResponse {
  // If true, the requested VM exists and info was returned.
  bool success = 1;

  // Information about the VM that was requested.
  VmInfo vm_info = 2;
}

// Request for information about the VM that is specific to
// enterprise reporting.
message GetVmEnterpriseReportingInfoRequest {
  // The name of the VM.
  string vm_name = 1;

  // The owner of the VM (cryptohome id).
  string owner_id = 2;
}

// Response sent back by vm_concierge after it receives a
// GetEnterpriseReportingInfo call. Right now this only returns the kernel
// version of the Termina VM. The VM must be running in order for the call to
// deliver the kernel version.
message GetVmEnterpriseReportingInfoResponse {
  bool success = 1;
  string failure_reason = 2;

  string vm_kernel_version = 3;
}

// The type of storage location for a disk image.
enum StorageLocation {
  // Subdirectory under /home/root/<id>/crosvm.
  STORAGE_CRYPTOHOME_ROOT = 0;

  // Subdirectory under /home/root/<id>/pvm.
  STORAGE_CRYPTOHOME_PLUGINVM = 1;
}

// Any changes here must be reflected in the CrostiniDiskImageStatus enum in
// Chrome's enums.xml.
enum DiskImageStatus {
  // Unknown status.
  DISK_STATUS_UNKNOWN = 0;

  // The disk image was created.
  DISK_STATUS_CREATED = 1;

  // The disk already existed.
  DISK_STATUS_EXISTS = 2;

  // Unable to create the disk image.
  DISK_STATUS_FAILED = 3;

  // Specified Disk does not exist.
  DISK_STATUS_DOES_NOT_EXIST = 4;

  // The specified disk was destroyed.
  DISK_STATUS_DESTROYED = 5;

  // The command is executing.
  DISK_STATUS_IN_PROGRESS = 6;

  // The disk image was resized.
  DISK_STATUS_RESIZED = 7;
}

// Request to concierge to create a disk image.
message CreateDiskImageRequest {
  // The cryptohome id for the user's encrypted storage.
  string cryptohome_id = 1;

  // The path to the disk image. This must be a relative path, and any
  // directories must already exist.
  string disk_path = 2;

  // The logical size of the new disk image, in bytes.
  // If non-zero, the disk will be preallocated and fixed to the given size.
  // If unspecified or 0, a size will be chosen automatically and the image will
  // be sparse.
  uint64 disk_size = 3;

  // The type of disk image to be created.
  DiskImageType image_type = 4;

  // The storage location for the disk image.
  StorageLocation storage_location = 5;

  // Size of the source media associated with this image.
  uint64 source_size = 6;

  // Parameters to pass to Plugin VM helper to facilitate creating
  // new image.
  repeated string params = 7;
}

// Response to a CreateDiskImageRequest.
message CreateDiskImageResponse {
  // If true, the disk image has been successfully created.
  DiskImageStatus status = 1;

  // The absolute path to the created disk image, if it was successfully
  // created or already existed.
  string disk_path = 2;

  // The failure reason if the disk image could not be created or doesn't exist.
  string failure_reason = 3;

  // Command identifier if status is DISK_STATUS_IN_PROGRESS.
  string command_uuid = 4;
}

// Request to concierge to destroy a disk image.
message DestroyDiskImageRequest {
  // The cryptohome id for the user's encrypted storage.
  string cryptohome_id = 1;

  // The path to the disk image. This must be a relative path.
  string disk_path = 2;
}

// Response to a DestroyDiskImageRequest.
message DestroyDiskImageResponse {
  // If DISK_STATUS_DESTROYED, the disk image has been successfully destroyed.
  // If DISK_STATUS_DOES_NOT_EXIST, the disk image had already been removed.
  DiskImageStatus status = 1;

  // The failure reason if the disk image could not be destroyed or doesn't
  // exist.
  string failure_reason = 3;
}

// Request to concierge to resize a disk image.
message ResizeDiskImageRequest {
  // The cryptohome id for the user's encrypted storage.
  string cryptohome_id = 1;

  // The name of the vm image.
  string vm_name = 2;

  // The desired logical size of the disk image, in bytes.
  uint64 disk_size = 3;
}

// Response to a ResizeDiskImageRequest.
message ResizeDiskImageResponse {
  // If DISK_STATUS_RESIZED, the disk image has been successfully resized.
  DiskImageStatus status = 1;

  // The failure reason if the disk image could not be resized.
  string failure_reason = 2;

  // Command identifier if status is DISK_STATUS_IN_PROGRESS.
  string command_uuid = 3;
}

// Request to concierge to export a disk image.
// Must be accompanied by an FD. The contents of `disk_path` will be written to
// the passed FD.
message ExportDiskImageRequest {
  // The cryptohome id for the user's encrypted storage.
  string cryptohome_id = 1;

  // The path to the disk image. This must be a relative path.
  string disk_path = 2;

  // Whether we should calculate SHA256 digest of the resulting image. The
  // digest is supposed to be written into the second attached file descriptor.
  bool generate_sha256_digest = 3;
}

// Response to a ExportDiskImageRequest.
message ExportDiskImageResponse {
  // If DISK_STATUS_CREATED, the disk image has been successfully exported.
  DiskImageStatus status = 1;

  // The failure reason if the disk image could not be exported.
  string failure_reason = 2;

  // Command identifier if status is DISK_STATUS_IN_PROGRESS.
  string command_uuid = 3;
}

// Request to concierge to import a disk image.
// Must be accompanied by an FD. The contents will be written at `disk_path`
// location.
message ImportDiskImageRequest {
  // The cryptohome id for the user's encrypted storage.
  string cryptohome_id = 1;

  // The path to the resulting disk image. This must be a relative path.
  string disk_path = 2;

  // The storage location for the disk image.
  StorageLocation storage_location = 3;

  // Size of the source image (corresponding to the passed FD).
  // Used to calculate progress of the import operation.
  uint64 source_size = 4;
}

// Response to a ImportDiskImageRequest.
message ImportDiskImageResponse {
  // If DISK_STATUS_CREATED, the disk image has been successfully imported.
  DiskImageStatus status = 1;

  // The failure reason if the disk image could not be imported.
  string failure_reason = 2;

  // Command identifier if status is DISK_STATUS_IN_PROGRESS.
  string command_uuid = 3;
}

// Request about status of image import, export, or resize command.
message DiskImageStatusRequest {
  // Command identifier.
  string command_uuid = 1;
}

// Response to DiskImageStatusRequest. Also being sent as a signal.
message DiskImageStatusResponse {
  // Command identifier.
  string command_uuid = 1;

  // Status of the command.
  DiskImageStatus status = 2;

  // The failure reason if the command could not be completed.
  string failure_reason = 3;

  // Progress from 0 to 100.
  uint32 progress = 4;
}

// Request to cancel image import or export command that is being
// executed.
message CancelDiskImageRequest {
  // Command identifier.
  string command_uuid = 1;
}

// Response to CancelDiskImageRequest.
message CancelDiskImageResponse {
  // If true, the request was successfully canceled. The request will
  // fail if it is unknown, or if it has already completed (successfully
  // or unsuccessfully).
  bool success = 1;

  // The failure reason if the command could not be completed.
  string failure_reason = 2;
}

// Request to list all VM disk images in the given storage area.
message ListVmDisksRequest {
  // The cryptohome id for the user's encrypted storage.
  string cryptohome_id = 1;

  // The storage location to check.
  StorageLocation storage_location = 2;

  // Requester may set this field to 'true' to retrieve data about
  // images in all known locations, in which case data in storage_location
  // field will be ignored.
  bool all_locations = 3;

  // Tells concierge to only return data about specified VM with matching
  // name. When empty, information about all VMs will be returned.
  string vm_name = 4;
}

// Information about VM image.
message VmDiskInfo {
  // Name of the image.
  string name = 1;

  // Location of the image.
  StorageLocation storage_location = 2;

  // The size of the image in bytes.
  uint64 size = 3;

  // The minimum size the image may be resized to, or 0 if unknown.
  uint64 min_size = 4;

  // The type of the disk image (raw, qcow2, etc.).
  DiskImageType image_type = 5;

  // True if the user chose the size for this disk.
  // False if the disk is automatically sized based on free space.
  bool user_chosen_size = 6;

  // The absolute path to the disk.
  string path = 7;
}

// Response to ListVmDisks {
message ListVmDisksResponse {
  // If true, the images array is valid.
  bool success = 1;

  // List of disk images.
  repeated VmDiskInfo images = 2;

  // The failure reason if the disks could not be listed.
  string failure_reason = 3;

  // The total size in bytes on disk of the disk images in the response.
  uint64 total_size = 4;
}

// Message used in the signal for when a container has failed to start up.
message ContainerStartedSignal {
  // Name of the VM the container is in.
  string vm_name = 1;

  // Name of the container within the VM.
  string container_name = 2;

  // The owner of the vm and container.
  string owner_id = 3;
}

// Request to start a specified container image within a VM. If the container
// does not exist in the VM it will be created. Used with the StartContainer
// D-Bus message into vm_concierge.
// This method is deprecated and no longer implemented in vm_concierge.
// Requests to start a container should be handled through tremplin instead.
message StartContainerRequest {
  option deprecated = true;

  // Name of the VM to start the container in.
  string vm_name = 1;

  // Name of the container to start within the VM. If empty, the default
  // container name will be used.
  string container_name = 2;

  // Username for the default user in the container. This is only used if the
  // container has not been created yet.
  string container_username = 3;

  // Async mode is always used now.
  bool async = 4 [deprecated = true];

  // The cryptohome id for the user's encrypted storage. This is used for SSH
  // key storage.
  string cryptohome_id = 5;

  // Represents the privilege level with which a container should be started. If
  // the container is already running this should take effect on the next boot.
  enum PrivilegeLevel {
    // Don't change the privilege level of the container.
    UNCHANGED = 0;

    // Make the container unprivileged.
    UNPRIVILEGED = 1;

    // Make the container privileged.
    PRIVILEGED = 2;
  }

  PrivilegeLevel privilege_level = 6;
}

enum ContainerStatus {
  // Unknown status.
  CONTAINER_STATUS_UNKNOWN = 0;

  // The container is already running.
  CONTAINER_STATUS_RUNNING = 1;

  // The container is currently starting up.
  CONTAINER_STATUS_STARTING = 2;

  // The container failed to startup.
  CONTAINER_STATUS_FAILURE = 3;
}

// Response sent back by vm_concierge when it receives a StartContaienr D-Bus
// message.
message StartContainerResponse {
  // Use the status field instead.
  bool success = 1 [deprecated = true];

  // The failure_reason if the status is CONTAINER_STATUS_FAILURE.
  string failure_reason = 2;

  // The status of the container as a result of the StartContainer call. If the
  // status is CONTAINER_STATUS_STARTING then a D-Bus signal will be sent to
  // indicate whether success or failure occurred. The signal should be
  // registered for before the StartContainer call is made because it may be
  // sent before the call returns.
  ContainerStatus status = 3;
}

// Request to get the SSH keys associated with the host and a specific
// container for the GetContainerSshKeys call. These keys will be generated
// when StartContainer is called the first time for a container, so this should
// not be called until after that call is invoked.
message ContainerSshKeysRequest {
  // Name of the VM to target.
  string vm_name = 1;

  // Name of the container within the VM to target, if empty the default
  // container name will be used.
  string container_name = 2;

  // The cryptohome id for the user's encrypted storage.
  string cryptohome_id = 3;
}

// Response sent back by vm_concierge when it receives a GetContainerSshKeys
// call. If either of the keys do not exist, the empty string will be set for
// that value.
message ContainerSshKeysResponse {
  // Public key of the container for verification of it as a known host. This
  // will be a single line string equivalent to the contents in the ssh-keygen
  // generated file.
  string container_public_key = 1;

  // Private key for the host, counterpart to the public key which is stored in
  // the container as an authorized host. This will be a multiline string that
  // is equivalent to the contents in the ssh-keygen generated file. This will
  // be the same for all VMs/containers.
  string host_private_key = 2;

  // The hostname of the container.
  string hostname = 3;

  // Public key of the host for verification of it as a known host. This
  // will be a single line string equivalent to the contents in the ssh-keygen
  // generated file.
  string host_public_key = 4;

  // Private key for the container, counterpart to the public key which is
  // stored in the container. This will be a multiline string that
  // is equivalent to the contents in the ssh-keygen generated file. This is
  // unique for each container.
  string container_private_key = 5;
}

// Request to vm_concierge to attach a USB device to a VM.
message AttachUsbDeviceRequest {
  // Name of the VM to attach the USB device to.
  string vm_name = 1;

  // The owner of the VM.
  string owner_id = 2;

  // The USB bus the USB device is connected to. This value should fit
  // in a uint8_t.
  uint32 bus_number = 3;

  // The port number of the USB device on the bus. This value should
  // fit in a uint8_t.
  uint32 port_number = 4;

  // Vendor ID of the USB device. This value should fit in a uint16_t.
  uint32 vendor_id = 5;

  // Produce ID of the USB device. This value should fit in a
  // uint16_t.
  uint32 product_id = 6;
}

// Response sent back by vm_concierge after it receives an
// AttachUsbDeviceRequest call.
message AttachUsbDeviceResponse {
  // Was the USB device successfully attached?
  bool success = 1;

  // The USB port number that was allocated to the USB device on the guest.
  uint32 guest_port = 2;

  // The reason for the failure, if there was one.
  string reason = 3;
}

// Request sent to remove a USB device from a VM.
message DetachUsbDeviceRequest {
  // The name of the VM.
  string vm_name = 1;

  // The owner of the VM.
  string owner_id = 2;

  // The USB port the device is attached to on the guest. This value
  // should fit in a uint8_t.
  uint32 guest_port = 3;
}

// Response sent back by vm_concierge after it receives a
// DetachUsbDeviceRequest call.
message DetachUsbDeviceResponse {
  // Was the USB device successfully detached?
  bool success = 1;

  // The reason for the failure, if there was one.
  string reason = 2;
}

// Request sent to get a list of all USB devices attached to a guest VM.
message ListUsbDeviceRequest {
  // The name of the VM.
  string vm_name = 1;

  // The owner of the VM.
  string owner_id = 2;
}

// A description of a single USB device.
message UsbDeviceMessage {
  // The port it's attached to.
  uint32 guest_port = 1;

  // The vendor ID of the device.
  uint32 vendor_id = 2;

  // The product ID of the device.
  uint32 product_id = 3;

  // The name of the device.
  string device_name = 4;
}

// Response sent back by vm_concierge after it receives a
// ListUsbDeviceRequest call.
message ListUsbDeviceResponse {
  // Did the request succeed?
  bool success = 1;

  // List of USB device descriptors, one for each attached USB device.
  repeated UsbDeviceMessage usb_devices = 2;
}

// Response sent back by vm_concierge after it receives a GetDnsSettings call.
// Also being broadcast via DnsSettingsChanged signal.
message DnsSettings {
  // List of DNS servers.
  repeated string nameservers = 1;

  // List of search domains.
  repeated string search_domains = 2;
}

enum CpuCgroup {
  // The CPU cgroup for all Termina VM processes.
  CPU_CGROUP_TERMINA = 0;
  // The CPU cgroup for all Plugin VM processes.
  CPU_CGROUP_PLUGINVM = 1;
  // The CPU cgroup for all ARCVM processes.
  CPU_CGROUP_ARCVM = 2;
}

enum CpuRestrictionState {
  // The CPU usage is relaxed.
  CPU_RESTRICTION_FOREGROUND = 0;
  // The CPU usage is tightly restricted.
  CPU_RESTRICTION_BACKGROUND = 1;
}

// Information that must be included with every SetVmCpuRestriction dbus
// message.
message SetVmCpuRestrictionRequest {
  // The CPU cpu cgroup to change.
  CpuCgroup cpu_cgroup = 1;
  // The CPU restriction state to apply.
  CpuRestrictionState cpu_restriction_state = 2;
}

// Response sent back by vm_concierge after it receives a SetVmCpuRestriction
// call.
message SetVmCpuRestrictionResponse {
  // Did the request succeed?
  bool success = 1;
}

// Request to adjust parameters of a given VM.
message AdjustVmRequest {
  // An identifier for this VM.
  string name = 1;

  // The cryptohome id of the owner of this VM.
  string owner_id = 2;

  // Adjustment to be performed.
  string operation = 3;

  // Additional parameters for the adjustment operation.
  repeated string params = 4;
}

// Response to an AdjustVmRequest.
message AdjustVmResponse {
  // If true, the adjustment was done.
  bool success = 1;

  // If the attempt to adjust VM failed, the reason for the failure.
  string failure_reason = 2;
};

// Request to set owner id of a given VM.
message SetVmIdRequest {
  // An identifier for this VM.
  string name = 1;

  // The current cyptohome id of this VM.
  string src_owner_id = 2;

  // The cryptohome id to set for this VM.
  string dest_owner_id = 3;
}

// Response to a SetVmIdRequest.
message SetVmIdResponse {
  // If true, the owner id of the VM was successfully changed.
  bool success = 1;

  // If the attempt to set the owner id failed, the reason for failure.
  string failure_reason = 2;
}

// Message used in the signal for when a VM owner id is changed.
message VmIdChangedSignal {
  // The name of the VM which has changed.
  string name = 1;

  // The new owner of the vm.
  string owner_id = 2;

  // The previous owner of the vm.
  string prev_owner_id = 3;

  // The virtual socket context id assigned to the VM which has changed.
  int64 cid = 4;
}