fcntl40.c: Test fcntl using F_CREATED_QUERY

Signed-off-by: Wei Gao <wegao@suse.com>

This is new test case for fcntl using new F_CREATED_QUERY operation.
Based on a kernel selftest commit d0fe8920cbe4.

Signed-off-by: Wei Gao <wegao@suse.com>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>

Author: Wei Gao via ltp

include/lapi/fcntl.h

@@ -154,6 +154,14 @@
 # define RENAME_WHITEOUT		(1 << 2)
 #endif
 
+#ifndef F_LINUX_SPECIFIC_BASE
+#define F_LINUX_SPECIFIC_BASE 1024
+#endif
+
+#ifndef F_CREATED_QUERY
+#define F_CREATED_QUERY (F_LINUX_SPECIFIC_BASE + 4)
+#endif
+
 /* splice, vmsplice, tee */
 
 #ifndef SPLICE_F_NONBLOCK

runtest/syscalls

@@ -362,6 +362,8 @@ fcntl38 fcntl38
 fcntl38_64 fcntl38_64
 fcntl39 fcntl39
 fcntl39_64 fcntl39_64
+fcntl40 fcntl40
+fcntl40_64 fcntl40_64
 
 fdatasync01 fdatasync01
 fdatasync02 fdatasync02

testcases/kernel/syscalls/fcntl/.gitignore

@@ -72,3 +72,5 @@
 /fcntl38_64
 /fcntl39
 /fcntl39_64
+/fcntl40
+/fcntl40_64

testcases/kernel/syscalls/fcntl/fcntl40.c

@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2024 SUSE Wei Gao <wegao@suse.com>
+ */
+
+/*\
+ * Basic test for fcntl using F_CREATED_QUERY.
+ * Verify if the fcntl() syscall is recognizing whether a file has been
+ * created or not via O_CREAT when O_CLOEXEC is also used.
+ *
+ * Test is based on a kernel selftests commit d0fe8920cbe4.
+ */
+
+#include "lapi/fcntl.h"
+#include "tst_test.h"
+
+#define TEST_NAME "LTP_FCNTL_CREATED_QUERY_TEST"
+
+static void verify_fcntl(void)
+{
+	int fd;
+
+	fd = SAFE_OPEN("/dev/null", O_RDONLY | O_CLOEXEC);
+
+	/* We didn't create "/dev/null". */
+	TST_EXP_EQ_LI(fcntl(fd, F_CREATED_QUERY, 0), 0);
+	SAFE_CLOSE(fd);
+
+	fd = SAFE_OPEN(TEST_NAME, O_CREAT | O_RDONLY | O_CLOEXEC, 0600);
+
+	TST_EXP_EQ_LI(fcntl(fd, F_CREATED_QUERY, 0), 1);
+	SAFE_CLOSE(fd);
+
+	fd = SAFE_OPEN(TEST_NAME, O_RDONLY | O_CLOEXEC);
+
+	/* We're opening it again, so no positive creation check. */
+	TST_EXP_EQ_LI(fcntl(fd, F_CREATED_QUERY, 0), 0);
+	SAFE_CLOSE(fd);
+	SAFE_UNLINK(TEST_NAME);
+}
+
+static struct tst_test test = {
+	.test_all = verify_fcntl,
+	.needs_tmpdir = 1,
+	.min_kver = "6.12",
+};