[LTP] [PATCH v1] Add common.h utilities for aiodio tests

[Andrea Cervesato]

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 testcases/kernel/io/ltp-aiodio/common.h | 55 +++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 testcases/kernel/io/ltp-aiodio/common.h

diff --git a/testcases/kernel/io/ltp-aiodio/common.h b/testcases/kernel/io/ltp-aiodio/common.h
new file mode 100644
index 000000000..230d9d392
--- /dev/null
+++ b/testcases/kernel/io/ltp-aiodio/common.h
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2021 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Common utilities for aiodio tests.
+ */
+
+#include <stdlib.h>
+#include "tst_test.h"
+
+static char *check_zero(char *buf, int size)
+{
+	char *p;
+
+	p = buf;
+
+	while (size > 0) {
+		if (*buf != 0) {
+			tst_res(TINFO,
+				"non zero buffer at buf[%lu] => 0x%02x,%02x,%02x,%02x",
+				buf - p, (unsigned int)buf[0],
+				size > 1 ? (unsigned int)buf[1] : 0,
+				size > 2 ? (unsigned int)buf[2] : 0,
+				size > 3 ? (unsigned int)buf[3] : 0);
+			tst_res(TINFO, "buf %p, p %p", buf, p);
+			return buf;
+		}
+		buf++;
+		size--;
+	}
+
+	return 0;
+}
+
+static void io_append(const char *path, char pattern, int flags, size_t bs, size_t bcount)
+{
+	int fd;
+	size_t i;
+	char *bufptr;
+
+	bufptr = SAFE_MEMALIGN(getpagesize(), bs);
+	memset(bufptr, pattern, bs);
+
+	fd = SAFE_OPEN(path, flags, 0666);
+
+	for (i = 0; i < bcount; i++)
+		SAFE_WRITE(1, fd, bufptr, bs);
+
+	free(bufptr);
+	SAFE_CLOSE(fd);
+}
-- 
2.34.0