logging: include module logs from its parent namespace (#8221)

logging.go

@@ -550,7 +550,12 @@ func (cl *CustomLog) loggerAllowed(name string, isModule bool) bool {
 		for _, namespace := range cl.Include {
 			var hasPrefix bool
 			if isModule {
-				hasPrefix = strings.HasPrefix(namespace+".", name)
+				// the namespace is the module or one of its
+				// sub-loggers (e.g. "http.log.access" for "http")
+				hasPrefix = strings.HasPrefix(namespace+".", name) ||
+					// the namespace is a parent of the module (e.g.
+					// "http.handlers" for "http.handlers.file_server")
+					strings.HasPrefix(name, namespace+".")
 			} else {
 				hasPrefix = strings.HasPrefix(name, namespace+".")
 			}

logging_test.go

@@ -87,6 +87,18 @@ func TestCustomLog_loggerAllowed(t *testing.T) {
 			},
 			want: true,
 		},
+		{
+			name: "include module from parent",
+			fields: fields{
+				Include: []string{"foo"},
+				Exclude: []string{},
+			},
+			args: args{
+				name:     "foo.bar",
+				isModule: true,
+			},
+			want: true,
+		},
 		{
 			name: "excluded module is not printed",
 			fields: fields{