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-rw-r--r--arch/um/drivers/ubd.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/um/drivers/ubd.h b/arch/um/drivers/ubd.h
new file mode 100644
index 000000000..2985c1466
--- /dev/null
+++ b/arch/um/drivers/ubd.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001 RidgeRun, Inc (glonnon@ridgerun.com)
+ */
+
+#ifndef __UM_UBD_USER_H
+#define __UM_UBD_USER_H
+
+#include <os.h>
+
+int start_io_thread(struct os_helper_thread **td_out, int *fd_out);
+void *io_thread(void *arg);
+extern int kernel_fd;
+
+extern int ubd_read_poll(int timeout);
+extern int ubd_write_poll(int timeout);
+
+#define UBD_REQ_BUFFER_SIZE 64
+
+#endif
+