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ash / components / arc / mojom / disk_space.mojom [blame]

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Next MinVersion: 6

module arc.mojom;

// Represents total storage usage of Android applications.
struct ApplicationsSize {
  // Usage for APK and OBB.
  uint64 total_code_bytes;
  // Usage for data and media.
  uint64 total_data_bytes;
  // Usage for applications' cache.
  uint64 total_cache_bytes;
};

struct DiskSpace {
  uint64 space_in_bytes;
};

struct QuotaSpaces {
  array<int64> curspaces_for_uids;
  array<int64> curspaces_for_gids;
  array<int64> curspaces_for_project_ids;
};

// Next Method ID: 7
// Deprecated method ID: 4
interface DiskSpaceHost {
  // Whether cryptohome supports quota-based stats.
  IsQuotaSupported@0() => (bool supported);

  // Get the current quota-based disk space usage for a uid. Returns -1 for
  // failure.
  GetQuotaCurrentSpaceForUid@1(uint32 uid) => (int64 cur_space);

  // Get the current quota-based disk space usage for a gid. Returns -1 for
  // failure.
  GetQuotaCurrentSpaceForGid@2(uint32 gid) => (int64 cur_space);

  // Get the current quota-based disk space usage for a project ID. Returns -1
  // for failure.
  [MinVersion=1] GetQuotaCurrentSpaceForProjectId@3(uint32 project_id) =>
      (int64 cur_space);

  // Returns lists of disk space currently used by each of the given IDs, by
  // translating the given ARC-side IDs to CrOS-side IDs and calling spaced's
  // GetQuotaCurrentSpacesForIds D-Bus method.
  // A null value is returned when this method itself fails (e.g. when there is
  // an invalid ID in the arguments, the D-Bus call to spaced fails, etc.)
  // An empty list is returned (for each ID type) when spaced does not return
  // results for all requested IDs, which can happen when it fails to get the
  // device path for the directory to query quota on.
  // When this method itself succeeds but fails to retrieve the space for a
  // particular ID due to a quotactl failure, its value is set to -1 in the
  // corresponding element in the list.
  [MinVersion=5] GetQuotaCurrentSpacesForIds@6(array<uint32> uids,
                                               array<uint32> gids,
                                               array<uint32> project_ids) =>
      (QuotaSpaces? quota_spaces);

  // Get free disk space in the stateful partition.
  [MinVersion=2] GetFreeDiskSpace@5() => (DiskSpace? free_space);
};

// Next Method ID: 3
interface DiskSpaceInstance {
  // Establishes full-duplex communication with the host.
  Init@0(pending_remote<DiskSpaceHost> host_remote) => ();

  // Retrieves storage usage (code, data, and cache) of all applications.
  // Returns the combined usage on internal and external storage.
  // The `succeeded` value indicates whether there is any error on ARC side.
  // When `succeeded` is false, `applications_size` is null.
  [MinVersion=3] GetApplicationsSize@1()
      => (bool succeeded, ApplicationsSize? applications_size);

  // Requests ARC to resize storage balloon so that the free space in ARC
  // becomes `free_space_bytes`. If `free_space_bytes` is larger than the total
  // disk size minus the space used by ARC, the balloon just becomes its minimum
  // size.
  [MinVersion=4] ResizeStorageBalloon@2(int64 free_space_bytes);
};