1 files changed, 108 insertions, 0 deletions
diff --git a/src/kernel/tests/include/tst_device.h b/src/kernel/tests/include/tst_device.h
new file mode 100644
index 0000000..00687a2
--- /dev/null
+++ b/src/kernel/tests/include/tst_device.h
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2016-2019 Cyril Hrubis <chrubis@suse.cz>
+ */
+
+#ifndef TST_DEVICE_H__
+#define TST_DEVICE_H__
+
+#include <unistd.h>
+
+struct tst_device {
+	const char *dev;
+	const char *fs_type;
+};
+
+/*
+ * Automatically initialized if test.needs_device is set.
+ */
+extern struct tst_device *tst_device;
+
+/*
+ * Just like umount() but retries several times on failure.
+ * @path: Path to umount
+ */
+int tst_umount(const char *path);
+
+/*
+ * Verifies if an earlier mount is successful or not.
+ * @path: Mount path to verify
+ */
+int tst_is_mounted(const char *path);
+int tst_is_mounted_at_tmpdir(const char *path);
+
+/*
+ * Clears a first few blocks of the device. This is needed when device has
+ * already been formatted with a filesystems, subset of mkfs.foo utils aborts
+ * the operation if it finds a filesystem signature there.
+ *
+ * Note that this is called from tst_mkfs() automatically, so you probably will
+ * not need to use this from the test yourself.
+ */
+int tst_clear_device(const char *dev);
+
+/*
+ * Finds a free xloop device for use and returns the free xloopdev minor(-1 for no
+ * free xloopdev). If path is non-NULL, it will be filled with free xloopdev path.
+ *
+ */
+int tst_find_free_xloopdev(const char *path, size_t path_len);
+
+/*
+ * Attaches a file to a xloop device.
+ *
+ * @dev_path Path to the xloop device e.g. /dev/xloop0
+ * @file_path Path to a file e.g. disk.img
+ * @return Zero on success, non-zero otherwise.
+ */
+int tst_attach_device(const char *dev_path, const char *file_path);
+
+/*
+ * Detaches a file from a xloop device fd.
+ *
+ * @dev_path Path to the xloop device e.g. /dev/xloop0
+ * @dev_fd a open fd for the xloop device
+ * @return Zero on succes, non-zero otherwise.
+ */
+int tst_detach_device_by_fd(const char *dev_path, int dev_fd);
+
+/*
+ * Detaches a file from a xloop device.
+ *
+ * @dev_path Path to the xloop device e.g. /dev/xloop0
+ * @return Zero on succes, non-zero otherwise.
+ *
+ * Internally this function opens the device and calls
+ * tst_detach_device_by_fd(). If you keep device file descriptor open you
+ * have to call the by_fd() variant since having the device open twice will
+ * prevent it from being detached.
+ */
+int tst_detach_device(const char *dev_path);
+
+/*
+ * To avoid FS deferred IO metadata/cache interference, so we do syncfs
+ * simply before the tst_dev_bytes_written invocation. For easy to use,
+ * we create this inline function tst_dev_sync.
+ */
+int tst_dev_sync(int fd);
+
+/*
+ * Reads test block device stat file and returns the bytes written since the
+ * last call of this function.
+ * @dev: test block device
+ */
+unsigned long tst_dev_bytes_written(const char *dev);
+
+/*
+ * Wipe the contents of given directory but keep the directory itself
+ */
+void tst_purge_dir(const char *path);
+
+/*
+ * Find the file or path belongs to which block dev
+ * @path  Path to find the backing dev
+ * @dev   The block dev
+ */
+void tst_find_backing_dev(const char *path, char *dev);
+
+#endif	/* TST_DEVICE_H__ */