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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/commands/feature_compatibility_version_parser.h"
#include "mongo/base/status.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/db/commands/feature_compatibility_version_document_gen.h"
#include "mongo/db/commands/feature_compatibility_version_documentation.h"
#include "mongo/db/namespace_string.h"
#include "mongo/util/version/releases.h"
namespace mongo {
using GenericFCV = multiversion::GenericFCV;
multiversion::FeatureCompatibilityVersion FeatureCompatibilityVersionParser::parseVersion(
StringData versionString) {
if (versionString == multiversion::toString(GenericFCV::kLastLTS)) {
return GenericFCV::kLastLTS;
}
if (versionString == multiversion::toString(GenericFCV::kLastContinuous)) {
return GenericFCV::kLastContinuous;
}
if (versionString == multiversion::toString(GenericFCV::kLatest)) {
return GenericFCV::kLatest;
}
uasserted(
4926900,
str::stream() << "Invalid value for " << multiversion::kParameterName << "document in "
<< NamespaceString::kServerConfigurationNamespace.toString() << ", found "
<< versionString << ", expected '"
<< multiversion::toString(GenericFCV::kLastLTS) << "' or '"
<< multiversion::toString(GenericFCV::kLastContinuous) << "' or '"
<< multiversion::toString(GenericFCV::kLatest) << ". See "
<< feature_compatibility_version_documentation::kCompatibilityLink << ".");
}
multiversion::FeatureCompatibilityVersion
FeatureCompatibilityVersionParser::parseVersionForFeatureFlags(StringData versionString) {
return multiversion::parseVersionForFeatureFlags(versionString);
}
StringData FeatureCompatibilityVersionParser::serializeVersion(
multiversion::FeatureCompatibilityVersion version) {
invariant(version == GenericFCV::kLastLTS || version == GenericFCV::kLastContinuous ||
version == GenericFCV::kLatest,
"Invalid version value for featureCompatibilityVersion documents");
return multiversion::toString(version);
}
StringData FeatureCompatibilityVersionParser::serializeVersionForFeatureFlags(
multiversion::FeatureCompatibilityVersion version) {
if (multiversion::isStandardFCV(version)) {
return multiversion::toString(version);
}
uasserted(ErrorCodes::BadValue,
fmt::format("Invalid FCV version {} for feature flag.", version));
}
Status FeatureCompatibilityVersionParser::validatePreviousVersionField(
multiversion::FeatureCompatibilityVersion version) {
if (version == GenericFCV::kLatest) {
return Status::OK();
}
return Status(ErrorCodes::Error(4926901),
"when present, 'previousVersion' field must be the latest binary version");
}
StatusWith<multiversion::FeatureCompatibilityVersion> FeatureCompatibilityVersionParser::parse(
const BSONObj& featureCompatibilityVersionDoc) {
try {
auto fcvDoc = FeatureCompatibilityVersionDocument::parse(
IDLParserErrorContext("FeatureCompatibilityVersionParser"),
featureCompatibilityVersionDoc);
auto version = fcvDoc.getVersion();
auto targetVersion = fcvDoc.getTargetVersion();
auto previousVersion = fcvDoc.getPreviousVersion();
// Downgrading FCV.
if ((version == GenericFCV::kLastLTS || version == GenericFCV::kLastContinuous) &&
version == targetVersion) {
// Downgrading FCV must have a "previousVersion" field.
if (!previousVersion) {
return Status(ErrorCodes::Error(4926902),
str::stream()
<< "Missing field "
<< FeatureCompatibilityVersionDocument::kPreviousVersionFieldName
<< " in downgrading states for " << multiversion::kParameterName
<< " document in "
<< NamespaceString::kServerConfigurationNamespace.toString()
<< ": " << featureCompatibilityVersionDoc << ". See "
<< feature_compatibility_version_documentation::kCompatibilityLink
<< ".");
}
if (version == GenericFCV::kLastLTS) {
// Downgrading to last-lts.
return GenericFCV::kDowngradingFromLatestToLastLTS;
} else {
return GenericFCV::kDowngradingFromLatestToLastContinuous;
}
}
// Non-downgrading FCV must not have a "previousVersion" field.
if (previousVersion) {
return Status(ErrorCodes::Error(4926903),
str::stream()
<< "Unexpected field "
<< FeatureCompatibilityVersionDocument::kPreviousVersionFieldName
<< " in non-downgrading states for " << multiversion::kParameterName
<< " document in "
<< NamespaceString::kServerConfigurationNamespace.toString() << ": "
<< featureCompatibilityVersionDoc << ". See "
<< feature_compatibility_version_documentation::kCompatibilityLink
<< ".");
}
// Upgrading FCV.
if (targetVersion) {
// For upgrading FCV, "targetVersion" must be kLatest or kLastContinuous and "version"
// must be kLastContinuous or kLastLTS.
if (targetVersion == GenericFCV::kLastLTS || version == GenericFCV::kLatest) {
return Status(ErrorCodes::Error(4926904),
str::stream()
<< "Invalid " << multiversion::kParameterName << " document in "
<< NamespaceString::kServerConfigurationNamespace.toString()
<< ": " << featureCompatibilityVersionDoc << ". See "
<< feature_compatibility_version_documentation::kCompatibilityLink
<< ".");
}
if (version == GenericFCV::kLastLTS) {
return targetVersion == GenericFCV::kLastContinuous
? GenericFCV::kUpgradingFromLastLTSToLastContinuous
: GenericFCV::kUpgradingFromLastLTSToLatest;
} else {
uassert(5070601,
str::stream()
<< "Invalid " << multiversion::kParameterName << " document in "
<< NamespaceString::kServerConfigurationNamespace.toString() << ": "
<< featureCompatibilityVersionDoc << ". See "
<< feature_compatibility_version_documentation::kCompatibilityLink
<< ".",
version == GenericFCV::kLastContinuous);
return GenericFCV::kUpgradingFromLastContinuousToLatest;
}
}
// No "targetVersion" or "previousVersion" field.
return version;
} catch (const DBException& e) {
auto status = e.toStatus();
status.addContext(str::stream()
<< "Invalid " << multiversion::kParameterName << " document in "
<< NamespaceString::kServerConfigurationNamespace.toString() << ": "
<< featureCompatibilityVersionDoc << ". See "
<< feature_compatibility_version_documentation::kCompatibilityLink
<< ".");
return status;
}
MONGO_UNREACHABLE
}
} // namespace mongo
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