SERVER-60817 Check write concern string for validity

1 files changed, 8 insertions, 1 deletions

diff --git a/src/mongo/db/repl/repl_set_config.cpp b/src/mongo/db/repl/repl_set_config.cpp
index a626634af15..ecae0048ee3 100644
--- a/src/mongo/db/repl/repl_set_config.cpp
+++ b/src/mongo/db/repl/repl_set_config.cpp
@@ -427,7 +427,7 @@ Status ReplSetConfig::_validate(bool allowSplitHorizonIP) const {
 
 Status ReplSetConfig::checkIfWriteConcernCanBeSatisfied(
     const WriteConcernOptions& writeConcern) const {
-    if (!writeConcern.wMode.empty() && writeConcern.wMode != WriteConcernOptions::kMajority) {
+    if (writeConcern.writeModeIsCustom()) {
         StatusWith<ReplSetTagPattern> tagPatternStatus = findCustomWriteMode(writeConcern.wMode);
         if (!tagPatternStatus.isOK()) {
             return tagPatternStatus.getStatus();
@@ -738,6 +738,13 @@ bool ReplSetConfig::containsCustomizedGetLastErrorDefaults() const {
              getLastErrorDefaults.syncMode == WriteConcernOptions::SyncMode::UNSET);
 }
 
+Status ReplSetConfig::validateWriteConcern(const WriteConcernOptions& writeConcern) const {
+    if (writeConcern.writeModeIsCustom()) {
+        return findCustomWriteMode(writeConcern.wMode).getStatus();
+    }
+    return Status::OK();
+}
+
 bool ReplSetConfig::isSplitConfig() const {
     return !!_recipientConfig;
 }