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-rw-r--r--src/shared/loop-util.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/src/shared/loop-util.h b/src/shared/loop-util.h
new file mode 100644
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+++ b/src/shared/loop-util.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include "macro.h"
+
+typedef struct LoopDevice LoopDevice;
+
+/* Some helpers for setting up loopback block devices */
+
+struct LoopDevice {
+ int fd;
+ int nr;
+ char *node;
+ bool relinquished;
+};
+
+int loop_device_make(int fd, int open_flags, LoopDevice **ret);
+int loop_device_make_by_path(const char *path, int open_flags, LoopDevice **ret);
+
+LoopDevice* loop_device_unref(LoopDevice *d);
+DEFINE_TRIVIAL_CLEANUP_FUNC(LoopDevice*, loop_device_unref);
+
+void loop_device_relinquish(LoopDevice *d);