SERVER-42120 Add configsvrRenameCollection that takes NamespaceSerializer locks and distributed locks on the database and collection.

2 files changed, 128 insertions, 0 deletions

diff --git a/src/mongo/db/s/SConscript b/src/mongo/db/s/SConscript
index 528b880d93c..62583c09cf8 100644
--- a/src/mongo/db/s/SConscript
+++ b/src/mongo/db/s/SConscript
@@ -266,6 +266,7 @@ env.Library(
         'config/configsvr_move_chunk_command.cpp',
         'config/configsvr_move_primary_command.cpp',
         'config/configsvr_refine_collection_shard_key_command.cpp',
+        'config/configsvr_rename_collection_command.cpp',
         'config/configsvr_remove_shard_command.cpp',
         'config/configsvr_remove_shard_from_zone_command.cpp',
         'config/configsvr_shard_collection_command.cpp',
diff --git a/src/mongo/db/s/config/configsvr_rename_collection_command.cpp b/src/mongo/db/s/config/configsvr_rename_collection_command.cpp
new file mode 100644
index 00000000000..71f30139d4f
--- /dev/null
+++ b/src/mongo/db/s/config/configsvr_rename_collection_command.cpp
@@ -0,0 +1,127 @@
+/**
+ *    Copyright (C) 2019-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.
+ */
+
+#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/db/auth/authorization_session.h"
+#include "mongo/db/commands.h"
+#include "mongo/db/namespace_string.h"
+#include "mongo/db/s/config/sharding_catalog_manager.h"
+#include "mongo/s/grid.h"
+#include "mongo/s/request_types/rename_collection_gen.h"
+
+namespace mongo {
+namespace {
+/**
+ * Internal command run on config servers to rename a collection.
+ */
+class ConfigSvrRenameCollectionCommand final
+    : public TypedCommand<ConfigSvrRenameCollectionCommand> {
+public:
+    using Request = ConfigsvrRenameCollection;
+
+    class Invocation final : public InvocationBase {
+    public:
+        using InvocationBase::InvocationBase;
+
+        void typedRun(OperationContext* opCtx) {
+            const NamespaceString& nssSource = ns();
+            const NamespaceString nssTarget = Request().getTo();
+
+            uassert(ErrorCodes::IllegalOperation,
+                    "_configsvrRenameCollection can only be run on config servers",
+                    serverGlobalParams.clusterRole == ClusterRole::ConfigServer);
+            uassert(ErrorCodes::InvalidOptions,
+                    "renameCollection must be called with majority writeConcern",
+                    opCtx->getWriteConcern().wMode == WriteConcernOptions::kMajority);
+
+            // Set the operation context read concern level to local for reads into the config
+            // database.
+            repl::ReadConcernArgs::get(opCtx) =
+                repl::ReadConcernArgs(repl::ReadConcernLevel::kLocalReadConcern);
+
+            const auto catalogClient = Grid::get(opCtx)->catalogClient();
+
+            // For renameCollection within a database, we already take an exclusive lock on the
+            // database, so subsequent locks are more of a locking pattern formality rather than
+            // a necessity. Currently only assumes renaming within a database not across databases.
+            auto scopedDbLockSource =
+                ShardingCatalogManager::get(opCtx)->serializeCreateOrDropDatabase(opCtx,
+                                                                                  nssSource.db());
+            auto scopedCollLockSource =
+                ShardingCatalogManager::get(opCtx)->serializeCreateOrDropCollection(opCtx,
+                                                                                    nssSource);
+            auto scopedCollLockTarget =
+                ShardingCatalogManager::get(opCtx)->serializeCreateOrDropCollection(opCtx,
+                                                                                    nssTarget);
+
+            auto dbDistLockSource = uassertStatusOK(catalogClient->getDistLockManager()->lock(
+                opCtx, nssSource.db(), "renameCollection", DistLockManager::kDefaultLockTimeout));
+            auto collDistLockSource = uassertStatusOK(catalogClient->getDistLockManager()->lock(
+                opCtx, nssSource.ns(), "renameCollection", DistLockManager::kDefaultLockTimeout));
+            auto collDistLockTarget = uassertStatusOK(catalogClient->getDistLockManager()->lock(
+                opCtx, nssTarget.ns(), "renameCollection", DistLockManager::kDefaultLockTimeout));
+        }
+
+    private:
+        NamespaceString ns() const override {
+            return request().getRenameCollection();
+        }
+
+        bool supportsWriteConcern() const override {
+            return true;
+        }
+
+        void doCheckAuthorization(OperationContext* opCtx) const override {
+            uassert(ErrorCodes::Unauthorized,
+                    "Unauthorized",
+                    AuthorizationSession::get(opCtx->getClient())
+                        ->isAuthorizedForActionsOnResource(ResourcePattern::forClusterResource(),
+                                                           ActionType::internal));
+        }
+    };
+
+    std::string help() const override {
+        return "Internal command, which is exported by the sharding config server."
+               "Renames a collection";
+    }
+
+    bool adminOnly() const override {
+        return true;
+    }
+
+    AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
+        return AllowedOnSecondary::kNever;
+    }
+} configSvrRenameCollectionCmd;
+
+}  // namespace
+}  // namespace mongo