[LTP] [PATCH v1] fcntl40.c: Test fcntl using F_CREATED_QUERY

[Wei Gao]

Signed-off-by: Wei Gao <wegao@suse.com>
---
 include/lapi/fcntl.h                       |  8 ++++
 runtest/syscalls                           |  2 +
 testcases/kernel/syscalls/fcntl/.gitignore |  2 +
 testcases/kernel/syscalls/fcntl/fcntl40.c  | 52 ++++++++++++++++++++++
 4 files changed, 64 insertions(+)
 create mode 100644 testcases/kernel/syscalls/fcntl/fcntl40.c

diff --git a/include/lapi/fcntl.h b/include/lapi/fcntl.h
index 761331798..7c0502488 100644
--- a/include/lapi/fcntl.h
+++ b/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
diff --git a/runtest/syscalls b/runtest/syscalls
index ded035ee8..43e493eb1 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -363,6 +363,8 @@ fcntl38 fcntl38
 fcntl38_64 fcntl38_64
 fcntl39 fcntl39
 fcntl39_64 fcntl39_64
+fcntl40 fcntl40
+fcntl40_64 fcntl40_64
 
 fdatasync01 fdatasync01
 fdatasync02 fdatasync02
diff --git a/testcases/kernel/syscalls/fcntl/.gitignore b/testcases/kernel/syscalls/fcntl/.gitignore
index e60176973..e3486ee45 100644
--- a/testcases/kernel/syscalls/fcntl/.gitignore
+++ b/testcases/kernel/syscalls/fcntl/.gitignore
@@ -72,3 +72,5 @@
 /fcntl38_64
 /fcntl39
 /fcntl39_64
+/fcntl40
+/fcntl40_64
diff --git a/testcases/kernel/syscalls/fcntl/fcntl40.c b/testcases/kernel/syscalls/fcntl/fcntl40.c
new file mode 100644
index 000000000..ef03becef
--- /dev/null
+++ b/testcases/kernel/syscalls/fcntl/fcntl40.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2024 SUSE Wei Gao <wegao@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Basic test for fcntl using F_CREATED_QUERY.
+ *
+ * It is based on the following kernel commit:
+ * commit d0fe8920cbe42547798fd806f078eeaaba05df18
+ * Author: Christian Brauner brauner@kernel.org
+ * Date: Wed Jul 24 15:15:36 2024 +0200
+ */
+
+#include "lapi/fcntl.h"
+#include "tst_test.h"
+
+static void verify_fcntl(void)
+{
+	for (int i = 0; i < 101; i++) {
+		int fd;
+		char path[PATH_MAX];
+
+		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);
+		close(fd);
+
+		sprintf(path, "aaaa_%d", i);
+		fd = SAFE_OPEN(path, O_CREAT | O_RDONLY | O_CLOEXEC, 0600);
+
+		/* We created "aaaa_%d". */
+		TST_EXP_EQ_LI(fcntl(fd, F_CREATED_QUERY, 0), 1);
+		close(fd);
+
+		fd = SAFE_OPEN(path, 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);
+		close(fd);
+		unlink(path);
+	}
+}
+
+static struct tst_test test = {
+	.test_all = verify_fcntl,
+	.needs_tmpdir = 1,
+	.min_kver = "6.12",
+};
-- 
2.35.3