[LTP] [PATCH v6 13/16] Add statmount07 test

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

This test is verifying that statmount syscall is raising the correct
errors according with invalid input values.

Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 runtest/syscalls                                  |   1 +
 testcases/kernel/syscalls/statmount/.gitignore    |   1 +
 testcases/kernel/syscalls/statmount/statmount07.c | 144 ++++++++++++++++++++++
 3 files changed, 146 insertions(+)

diff --git a/runtest/syscalls b/runtest/syscalls
index a742e405b..bf222e466 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -1580,6 +1580,7 @@ statmount03 statmount03
 statmount04 statmount04
 statmount05 statmount05
 statmount06 statmount06
+statmount07 statmount07
 
 statfs01 statfs01
 statfs01_64 statfs01_64
diff --git a/testcases/kernel/syscalls/statmount/.gitignore b/testcases/kernel/syscalls/statmount/.gitignore
index 03a75bd40..b2a55c077 100644
--- a/testcases/kernel/syscalls/statmount/.gitignore
+++ b/testcases/kernel/syscalls/statmount/.gitignore
@@ -4,3 +4,4 @@ statmount03
 statmount04
 statmount05
 statmount06
+statmount07
diff --git a/testcases/kernel/syscalls/statmount/statmount07.c b/testcases/kernel/syscalls/statmount/statmount07.c
new file mode 100644
index 000000000..0cc834298
--- /dev/null
+++ b/testcases/kernel/syscalls/statmount/statmount07.c
@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2024 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * This test verifies that statmount() is raising the correct errors according
+ * with invalid input values.
+ */
+
+#define _GNU_SOURCE
+
+#include "statmount.h"
+#include "lapi/stat.h"
+
+#define MNTPOINT "mntpoint"
+
+static struct statmount *st_mount;
+static struct statmount *st_mount_null;
+static struct statmount *st_mount_small;
+static uint64_t mnt_id;
+static uint64_t mnt_id_dont_exist = -1;
+static size_t buff_size;
+static size_t buff_size_invalid = -1;
+
+struct tcase {
+	int exp_errno;
+	char *msg;
+	uint64_t *mnt_id;
+	uint64_t mask;
+	unsigned int flags;
+	size_t *buff_size;
+	struct statmount **buff;
+} tcases[] = {
+	{
+		ENOENT,
+		"mount id doesn't exist'",
+		&mnt_id_dont_exist,
+		0,
+		0,
+		&buff_size,
+		&st_mount
+	},
+	{
+		EOVERFLOW,
+		"invalid mask",
+		&mnt_id,
+		-1,
+		0,
+		&buff_size,
+		&st_mount
+	},
+	{
+		EOVERFLOW,
+		"small buffer for fs type",
+		&mnt_id,
+		STATMOUNT_FS_TYPE,
+		0,
+		&buff_size,
+		&st_mount_small
+	},
+	{
+		EOVERFLOW,
+		"small buffer for mnt root",
+		&mnt_id,
+		STATMOUNT_MNT_ROOT,
+		0,
+		&buff_size,
+		&st_mount_small
+	},
+	{
+		EOVERFLOW,
+		"small buffer for mnt point",
+		&mnt_id,
+		STATMOUNT_MNT_POINT,
+		0,
+		&buff_size,
+		&st_mount_small
+	},
+	{
+		EINVAL,
+		"flags must be zero",
+		&mnt_id,
+		0,
+		1,
+		&buff_size,
+		&st_mount
+	},
+	{
+		EFAULT,
+		"invalid buffer size",
+		&mnt_id,
+		0,
+		0,
+		&buff_size_invalid,
+		&st_mount
+	},
+	{
+		EFAULT,
+		"invalid buffer pointer",
+		&mnt_id,
+		0,
+		0,
+		&buff_size,
+		&st_mount_null
+	},
+};
+
+static void run(unsigned int n)
+{
+	struct tcase *tc = &tcases[n];
+
+	memset(st_mount, 0, sizeof(struct statmount));
+
+	TST_EXP_FAIL(statmount(*tc->mnt_id, tc->mask,
+		*tc->buff, *tc->buff_size, tc->flags),
+		tc->exp_errno, "%s", tc->msg);
+}
+
+static void setup(void)
+{
+	struct ltp_statx sx;
+
+	SAFE_STATX(AT_FDCWD, MNTPOINT, 0, STATX_MNT_ID_UNIQUE, &sx);
+
+	mnt_id = sx.data.stx_mnt_id;
+	buff_size = sizeof(struct statmount);
+}
+static struct tst_test test = {
+	.test = run,
+	.tcnt = ARRAY_SIZE(tcases),
+	.setup = setup,
+	.min_kver = "6.8",
+	.mount_device = 1,
+	.mntpoint = MNTPOINT,
+	.format_device = 1,
+	.bufs = (struct tst_buffers []) {
+		{&st_mount, .size = sizeof(struct statmount)},
+		{&st_mount_small, .size = sizeof(struct statmount)},
+		{}
+	}
+};

-- 
2.43.0