SERVER-27772 Force noop write on primary when readConcern:afterClusterTime > clusterTime on secondaries

1 files changed, 0 insertions, 172 deletions

diff --git a/src/mongo/db/read_concern.cpp b/src/mongo/db/read_concern.cpp
deleted file mode 100644
index 80602ff2fce..00000000000
--- a/src/mongo/db/read_concern.cpp
+++ /dev/null
@@ -1,172 +0,0 @@
-/**
- *    Copyright (C) 2016 MongoDB Inc.
- *
- *    This program is free software: you can redistribute it and/or  modify
- *    it under the terms of the GNU Affero General Public License, version 3,
- *    as published by the Free Software Foundation.
- *
- *    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
- *    GNU Affero General Public License for more details.
- *
- *    You should have received a copy of the GNU Affero General Public License
- *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- *    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 GNU Affero General 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.
- */
-
-#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kCommand
-
-#include "mongo/platform/basic.h"
-
-#include "mongo/db/read_concern.h"
-
-#include "mongo/base/status.h"
-#include "mongo/base/status_with.h"
-#include "mongo/db/commands.h"
-#include "mongo/db/concurrency/d_concurrency.h"
-#include "mongo/db/concurrency/write_conflict_exception.h"
-#include "mongo/db/curop.h"
-#include "mongo/db/op_observer.h"
-#include "mongo/db/operation_context.h"
-#include "mongo/db/repl/read_concern_args.h"
-#include "mongo/db/repl/repl_client_info.h"
-#include "mongo/db/repl/replication_coordinator.h"
-#include "mongo/db/server_options.h"
-#include "mongo/db/server_parameters.h"
-#include "mongo/util/log.h"
-
-namespace mongo {
-namespace {
-
-// This is a special flag that allows for testing of snapshot behavior by skipping the replication
-// related checks and isolating the storage/query side of snapshotting.
-bool testingSnapshotBehaviorInIsolation = false;
-ExportedServerParameter<bool, ServerParameterType::kStartupOnly> TestingSnapshotBehaviorInIsolation(
-    ServerParameterSet::getGlobal(),
-    "testingSnapshotBehaviorInIsolation",
-    &testingSnapshotBehaviorInIsolation);
-
-}  // namespace
-
-Status waitForReadConcern(OperationContext* opCtx, const repl::ReadConcernArgs& readConcernArgs) {
-    repl::ReplicationCoordinator* const replCoord = repl::ReplicationCoordinator::get(opCtx);
-
-    if (readConcernArgs.getLevel() == repl::ReadConcernLevel::kLinearizableReadConcern) {
-        if (replCoord->getReplicationMode() != repl::ReplicationCoordinator::modeReplSet) {
-            // For master/slave and standalone nodes, Linearizable Read is not supported.
-            return {ErrorCodes::NotAReplicaSet,
-                    "node needs to be a replica set member to use read concern"};
-        }
-
-        // Replica sets running pv0 do not support linearizable read concern until further testing
-        // is completed (SERVER-27025).
-        if (!replCoord->isV1ElectionProtocol()) {
-            return {
-                ErrorCodes::IncompatibleElectionProtocol,
-                "Replica sets running protocol version 0 do not support readConcern: linearizable"};
-        }
-
-        if (readConcernArgs.getArgsOpTime()) {
-            return {ErrorCodes::FailedToParse,
-                    "afterOpTime not compatible with linearizable read concern"};
-        }
-
-        if (!replCoord->getMemberState().primary()) {
-            return {ErrorCodes::NotMaster,
-                    "cannot satisfy linearizable read concern on non-primary node"};
-        }
-    }
-
-    // Skip waiting for the OpTime when testing snapshot behavior
-    if (!testingSnapshotBehaviorInIsolation && !readConcernArgs.isEmpty()) {
-        Status status = replCoord->waitUntilOpTimeForRead(opCtx, readConcernArgs);
-        if (!status.isOK()) {
-            return status;
-        }
-    }
-
-    if ((replCoord->getReplicationMode() == repl::ReplicationCoordinator::Mode::modeReplSet ||
-         testingSnapshotBehaviorInIsolation) &&
-        readConcernArgs.getLevel() == repl::ReadConcernLevel::kMajorityReadConcern) {
-        // ReadConcern Majority is not supported in ProtocolVersion 0.
-        if (!testingSnapshotBehaviorInIsolation && !replCoord->isV1ElectionProtocol()) {
-            return {ErrorCodes::ReadConcernMajorityNotEnabled,
-                    str::stream() << "Replica sets running protocol version 0 do not support "
-                                     "readConcern: majority"};
-        }
-
-        const int debugLevel = serverGlobalParams.clusterRole == ClusterRole::ConfigServer ? 1 : 2;
-
-        LOG(debugLevel) << "Waiting for 'committed' snapshot to be available for reading: "
-                        << readConcernArgs;
-
-        Status status = opCtx->recoveryUnit()->setReadFromMajorityCommittedSnapshot();
-
-        // Wait until a snapshot is available.
-        while (status == ErrorCodes::ReadConcernMajorityNotAvailableYet) {
-            LOG(debugLevel) << "Snapshot not available yet.";
-            replCoord->waitUntilSnapshotCommitted(opCtx, SnapshotName::min());
-            status = opCtx->recoveryUnit()->setReadFromMajorityCommittedSnapshot();
-        }
-
-        if (!status.isOK()) {
-            return status;
-        }
-
-        LOG(debugLevel) << "Using 'committed' snapshot: " << CurOp::get(opCtx)->query();
-    }
-
-    return Status::OK();
-}
-
-Status waitForLinearizableReadConcern(OperationContext* opCtx) {
-
-    repl::ReplicationCoordinator* replCoord =
-        repl::ReplicationCoordinator::get(opCtx->getClient()->getServiceContext());
-
-    {
-        Lock::DBLock lk(opCtx, "local", MODE_IX);
-        Lock::CollectionLock lock(opCtx->lockState(), "local.oplog.rs", MODE_IX);
-
-        if (!replCoord->canAcceptWritesForDatabase(opCtx, "admin")) {
-            return {ErrorCodes::NotMaster,
-                    "No longer primary when waiting for linearizable read concern"};
-        }
-
-        MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
-
-            WriteUnitOfWork uow(opCtx);
-            opCtx->getClient()->getServiceContext()->getOpObserver()->onOpMessage(
-                opCtx,
-                BSON("msg"
-                     << "linearizable read"));
-            uow.commit();
-        }
-        MONGO_WRITE_CONFLICT_RETRY_LOOP_END(
-            opCtx, "waitForLinearizableReadConcern", "local.rs.oplog");
-    }
-    WriteConcernOptions wc = WriteConcernOptions(
-        WriteConcernOptions::kMajority, WriteConcernOptions::SyncMode::UNSET, 0);
-
-    repl::OpTime lastOpApplied = repl::ReplClientInfo::forClient(opCtx->getClient()).getLastOp();
-    auto awaitReplResult = replCoord->awaitReplication(opCtx, lastOpApplied, wc);
-    if (awaitReplResult.status == ErrorCodes::WriteConcernFailed) {
-        return Status(ErrorCodes::LinearizableReadConcernError,
-                      "Failed to confirm that read was linearizable.");
-    }
-    return awaitReplResult.status;
-}
-
-}  // namespace mongo