Add flag for restricting downloads
This adds a flag that can be used to turn off the ability to download
and apply updates from the API. This value applies to all future
update checks that the update_engine performs. Changing this value
during an update check has no effect on the current update check.
Bug: 66016687
Test: unit-tests, manual OTA
Change-Id: I655adf23cae44c63079bfa9dc18ba8ca65d7a304
(cherry picked from commit e22f2ddfec92623d38efbf17c17917f68e52907a)
diff --git a/update_manager/real_updater_provider.cc b/update_manager/real_updater_provider.cc
index a085f42..efa3609 100644
--- a/update_manager/real_updater_provider.cc
+++ b/update_manager/real_updater_provider.cc
@@ -38,6 +38,7 @@
using chromeos_update_engine::OmahaRequestParams;
using chromeos_update_engine::SystemState;
using std::string;
+using update_engine::UpdateAttemptFlags;
using update_engine::UpdateEngineStatus;
namespace chromeos_update_manager {
@@ -416,40 +417,66 @@
DISALLOW_COPY_AND_ASSIGN(ForcedUpdateRequestedVariable);
};
+// A variable returning the current update restrictions that are in effect.
+class UpdateRestrictionsVariable
+ : public UpdaterVariableBase<UpdateRestrictions> {
+ public:
+ UpdateRestrictionsVariable(const string& name, SystemState* system_state)
+ : UpdaterVariableBase<UpdateRestrictions>(
+ name, kVariableModePoll, system_state) {}
+
+ private:
+ const UpdateRestrictions* GetValue(TimeDelta /* timeout */,
+ string* /* errmsg */) override {
+ UpdateAttemptFlags attempt_flags =
+ system_state()->update_attempter()->GetCurrentUpdateAttemptFlags();
+ UpdateRestrictions restriction_flags = UpdateRestrictions::kNone;
+ // Don't blindly copy the whole value, test and set bits that should
+ // transfer from one set of flags to the other.
+ if (attempt_flags & UpdateAttemptFlags::kFlagRestrictDownload) {
+ restriction_flags = static_cast<UpdateRestrictions>(
+ restriction_flags | UpdateRestrictions::kRestrictDownloading);
+ }
+
+ return new UpdateRestrictions(restriction_flags);
+ }
+
+ DISALLOW_COPY_AND_ASSIGN(UpdateRestrictionsVariable);
+};
+
// RealUpdaterProvider methods.
RealUpdaterProvider::RealUpdaterProvider(SystemState* system_state)
- : system_state_(system_state),
- var_updater_started_time_("updater_started_time",
- system_state->clock()->GetWallclockTime()),
- var_last_checked_time_(
- new LastCheckedTimeVariable("last_checked_time", system_state_)),
- var_update_completed_time_(
- new UpdateCompletedTimeVariable("update_completed_time",
- system_state_)),
- var_progress_(new ProgressVariable("progress", system_state_)),
- var_stage_(new StageVariable("stage", system_state_)),
- var_new_version_(new NewVersionVariable("new_version", system_state_)),
- var_payload_size_(new PayloadSizeVariable("payload_size", system_state_)),
- var_curr_channel_(new CurrChannelVariable("curr_channel", system_state_)),
- var_new_channel_(new NewChannelVariable("new_channel", system_state_)),
- var_p2p_enabled_(
- new BooleanPrefVariable("p2p_enabled", system_state_->prefs(),
- chromeos_update_engine::kPrefsP2PEnabled,
- false)),
- var_cellular_enabled_(
- new BooleanPrefVariable(
- "cellular_enabled", system_state_->prefs(),
- chromeos_update_engine::kPrefsUpdateOverCellularPermission,
- false)),
- var_consecutive_failed_update_checks_(
- new ConsecutiveFailedUpdateChecksVariable(
- "consecutive_failed_update_checks", system_state_)),
- var_server_dictated_poll_interval_(
- new ServerDictatedPollIntervalVariable(
- "server_dictated_poll_interval", system_state_)),
- var_forced_update_requested_(
- new ForcedUpdateRequestedVariable(
- "forced_update_requested", system_state_)) {}
-
+ : system_state_(system_state),
+ var_updater_started_time_("updater_started_time",
+ system_state->clock()->GetWallclockTime()),
+ var_last_checked_time_(
+ new LastCheckedTimeVariable("last_checked_time", system_state_)),
+ var_update_completed_time_(new UpdateCompletedTimeVariable(
+ "update_completed_time", system_state_)),
+ var_progress_(new ProgressVariable("progress", system_state_)),
+ var_stage_(new StageVariable("stage", system_state_)),
+ var_new_version_(new NewVersionVariable("new_version", system_state_)),
+ var_payload_size_(new PayloadSizeVariable("payload_size", system_state_)),
+ var_curr_channel_(new CurrChannelVariable("curr_channel", system_state_)),
+ var_new_channel_(new NewChannelVariable("new_channel", system_state_)),
+ var_p2p_enabled_(
+ new BooleanPrefVariable("p2p_enabled",
+ system_state_->prefs(),
+ chromeos_update_engine::kPrefsP2PEnabled,
+ false)),
+ var_cellular_enabled_(new BooleanPrefVariable(
+ "cellular_enabled",
+ system_state_->prefs(),
+ chromeos_update_engine::kPrefsUpdateOverCellularPermission,
+ false)),
+ var_consecutive_failed_update_checks_(
+ new ConsecutiveFailedUpdateChecksVariable(
+ "consecutive_failed_update_checks", system_state_)),
+ var_server_dictated_poll_interval_(new ServerDictatedPollIntervalVariable(
+ "server_dictated_poll_interval", system_state_)),
+ var_forced_update_requested_(new ForcedUpdateRequestedVariable(
+ "forced_update_requested", system_state_)),
+ var_update_restrictions_(new UpdateRestrictionsVariable(
+ "update_restrictions", system_state_)) {}
} // namespace chromeos_update_manager