1 files changed, 29 insertions, 0 deletions
diff --git a/src/shared/loop-util.h b/src/shared/loop-util.h
new file mode 100644
index 0000000..9538dae
--- /dev/null
+++ b/src/shared/loop-util.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#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, uint64_t offset, uint64_t size, uint32_t loop_flags, LoopDevice **ret);
+int loop_device_make_by_path(const char *path, int open_flags, uint32_t loop_flags, LoopDevice **ret);
+int loop_device_open(const char *loop_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);
+
+int loop_device_refresh_size(LoopDevice *d, uint64_t offset, uint64_t size);
+
+int loop_device_flock(LoopDevice *d, int operation);
+int loop_device_sync(LoopDevice *d);