CDRIVER-1031 gridfs inherits client config

Author: ajdavis

NEWS

@@ -1,3 +1,14 @@
+mongo-c-driver 1.3.1
+====================
+
+  * mongoc_client_get_gridfs now copies the client's read preferences, read
+    concern, and write concern to the newly created mongoc_gridfs_t. Before
+    this fix, GridFS operations were always executed with the default config:
+    data was read from the primary, with the read concern level "local", and
+    written with write concern "acknowledged". Now, if you have configured any
+    of these options on the mongoc_client_t, they are respected by the
+    mongoc_gridfs_t.
+
 mongo-c-driver 1.3.0
 ====================
 

src/mongoc/mongoc-gridfs.c

@@ -90,6 +90,9 @@ _mongoc_gridfs_new (mongoc_client_t *client,
                     bson_error_t    *error)
 {
    mongoc_gridfs_t *gridfs;
+   const mongoc_read_prefs_t *read_prefs;
+   const mongoc_read_concern_t *read_concern;
+   const mongoc_write_concern_t *write_concern;
    char buf[128];
    bool r;
 
@@ -117,11 +120,17 @@ _mongoc_gridfs_new (mongoc_client_t *client,
 
    gridfs->client = client;
 
+   read_prefs = mongoc_client_get_read_prefs (client);
+   read_concern = mongoc_client_get_read_concern (client);
+   write_concern = mongoc_client_get_write_concern (client);
+
    bson_snprintf (buf, sizeof(buf), "%s.chunks", prefix);
-   gridfs->chunks = _mongoc_collection_new (client, db, buf, NULL, NULL, NULL);
+   gridfs->chunks = _mongoc_collection_new (client, db, buf, read_prefs,
+                                            read_concern, write_concern);
 
    bson_snprintf (buf, sizeof(buf), "%s.files", prefix);
-   gridfs->files = _mongoc_collection_new (client, db, buf, NULL, NULL, NULL);
+   gridfs->files = _mongoc_collection_new (client, db, buf, read_prefs,
+                                           read_concern, write_concern);
 
    r = _mongoc_gridfs_ensure_index (gridfs, error);