SERVER-60761 Move the global read-only flag to be an OperationContext function

1 files changed, 21 insertions, 0 deletions

diff --git a/src/mongo/db/service_context.h b/src/mongo/db/service_context.h
index 44e12901cea..10dd5e33203 100644
--- a/src/mongo/db/service_context.h
+++ b/src/mongo/db/service_context.h
@@ -603,6 +603,24 @@ public:
         _catalogGeneration.fetchAndAdd(1);
     }
 
+    void disallowUserWrites() {
+        _userWritesAllowed.store(false);
+    }
+
+    /**
+     * Returns true if user writes are allowed.
+     *
+     * User writes are disallowed when starting with queryableBackupMode or
+     * recoverFromOplogAsStandalone to prevent users from writing to replicated collections in
+     * standalone mode.
+     *
+     * To determine whether an operation must run in read-only mode, use
+     * OperationContext::readOnly().
+     */
+    bool userWritesAllowed() const {
+        return _userWritesAllowed.load();
+    }
+
     LockedClient getLockedClient(OperationId id);
 
 private:
@@ -749,6 +767,9 @@ private:
     // When the catalog is restarted, the generation goes up by one each time.
     AtomicWord<uint64_t> _catalogGeneration{0};
 
+    // Server-wide flag indicating whether users' writes are allowed.
+    AtomicWord<bool> _userWritesAllowed{true};
+
     bool _startupComplete = false;
     stdx::condition_variable _startupCompleteCondVar;
 };