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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/policy/core/common/policy_statistics_collector.h"
#include <algorithm>
#include <string>
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/location.h"
#include "base/metrics/histogram_functions.h"
#include "base/notreached.h"
#include "base/task/task_runner.h"
#include "base/time/time.h"
#include "components/policy/core/common/cloud/enterprise_metrics.h"
#include "components/policy/core/common/policy_map.h"
#include "components/policy/core/common/policy_pref_names.h"
#include "components/policy/core/common/policy_service.h"
#include "components/policy/core/common/policy_types.h"
#include "components/policy/policy_constants.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
namespace policy {
namespace {
constexpr char kPoliciesSourceMetricsName[] = "Enterprise.Policies.Sources";
constexpr const char* kCBCMEnrollmentPolicies[] = {
"CloudManagementEnrollmentToken", "CloudManagementEnrollmentMandatory"};
enum SimplePolicySource {
kNone = 0,
kCloud = 1 << 0,
kPlatform = 1 << 1,
kMerge = kCloud | kPlatform,
kEnrollment = 1 << 2,
};
SimplePolicySource SimplifyPolicySource(PolicySource source,
const std::string& policy_name) {
switch (source) {
case POLICY_SOURCE_CLOUD:
case POLICY_SOURCE_CLOUD_FROM_ASH:
return kCloud;
case POLICY_SOURCE_PLATFORM:
case POLICY_SOURCE_ACTIVE_DIRECTORY:
// Adjust for enrollment policies which can never be set from cloud.
// Count them as cloud policy so that a device is considered as cloud
// managed even if there is enrollment token only.
for (const char* enrollment_policy : kCBCMEnrollmentPolicies) {
if (policy_name == enrollment_policy)
return kEnrollment;
}
return kPlatform;
case POLICY_SOURCE_MERGED:
return kMerge;
default:
// Other sources are only used for speicial cases and will not be counted.
return kNone;
}
}
void RecordPoliciesSources(SimplePolicySource source) {
if ((source & kMerge) == kMerge) {
base::UmaHistogramEnumeration(kPoliciesSourceMetricsName,
PoliciesSources::kHybrid);
} else if (source & kPlatform) {
base::UmaHistogramEnumeration(kPoliciesSourceMetricsName,
PoliciesSources::kPlatformOnly);
} else if (source & kCloud) {
if (source & kEnrollment) {
base::UmaHistogramEnumeration(
kPoliciesSourceMetricsName,
PoliciesSources::kCloudOnlyExceptEnrollment);
} else {
base::UmaHistogramEnumeration(kPoliciesSourceMetricsName,
PoliciesSources::kCloudOnly);
}
} else if (source & kEnrollment) {
base::UmaHistogramEnumeration(kPoliciesSourceMetricsName,
PoliciesSources::kEnrollmentOnly);
}
}
} // namespace
const base::TimeDelta PolicyStatisticsCollector::kStatisticsUpdateRate =
base::Days(1);
PolicyStatisticsCollector::PolicyStatisticsCollector(
const GetChromePolicyDetailsCallback& get_details,
const Schema& chrome_schema,
PolicyService* policy_service,
PrefService* prefs,
const scoped_refptr<base::TaskRunner>& task_runner)
: get_details_(get_details),
chrome_schema_(chrome_schema),
policy_service_(policy_service),
prefs_(prefs),
task_runner_(task_runner) {}
PolicyStatisticsCollector::~PolicyStatisticsCollector() = default;
void PolicyStatisticsCollector::Initialize() {
base::Time last_update =
prefs_->GetTime(policy_prefs::kLastPolicyStatisticsUpdate);
base::TimeDelta delay =
std::max(base::Time::Now() - last_update, base::TimeDelta());
if (delay >= kStatisticsUpdateRate)
CollectStatistics();
else
ScheduleUpdate(kStatisticsUpdateRate - delay);
}
// static
void PolicyStatisticsCollector::RegisterPrefs(PrefRegistrySimple* registry) {
registry->RegisterInt64Pref(policy_prefs::kLastPolicyStatisticsUpdate, 0);
}
void PolicyStatisticsCollector::RecordPolicyUse(int id, Condition condition) {
std::string suffix;
switch (condition) {
case kDefault:
break;
case kMandatory:
suffix = ".Mandatory";
break;
case kRecommended:
suffix = ".Recommended";
break;
}
base::UmaHistogramSparse("Enterprise.Policies" + suffix, id);
}
void PolicyStatisticsCollector::CollectStatistics() {
const PolicyMap& policies = policy_service_->GetPolicies(
PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()));
int source = kNone;
// Collect statistics.
for (Schema::Iterator it(chrome_schema_.GetPropertiesIterator());
!it.IsAtEnd(); it.Advance()) {
const PolicyMap::Entry* policy_entry = policies.Get(it.key());
if (!policy_entry)
continue;
const PolicyDetails* details = get_details_.Run(it.key());
if (details) {
RecordPolicyUse(details->id, kDefault);
if (policies.Get(it.key())->level == POLICY_LEVEL_MANDATORY) {
RecordPolicyUse(details->id, kMandatory);
} else {
RecordPolicyUse(details->id, kRecommended);
}
} else {
NOTREACHED();
}
source |= SimplifyPolicySource(policy_entry->source, it.key());
}
RecordPoliciesSources(static_cast<SimplePolicySource>(source));
// Take care of next update.
prefs_->SetTime(policy_prefs::kLastPolicyStatisticsUpdate, base::Time::Now());
ScheduleUpdate(kStatisticsUpdateRate);
}
void PolicyStatisticsCollector::ScheduleUpdate(base::TimeDelta delay) {
update_callback_.Reset(base::BindOnce(
&PolicyStatisticsCollector::CollectStatistics, base::Unretained(this)));
task_runner_->PostDelayedTask(FROM_HERE, update_callback_.callback(), delay);
}
} // namespace policy
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