syscalls/ioctl_loop06: Add LOOP_SET_BLOCK_SIZE error test

Signed-off-by: Yang Xu <[email protected]>
Reviwed-by: Cyril Hrubis <[email protected]>

Author: xuyang0410

runtest/syscalls

@@ -534,6 +534,7 @@ ioctl_loop02 ioctl_loop02
 ioctl_loop03 ioctl_loop03
 ioctl_loop04 ioctl_loop04
 ioctl_loop05 ioctl_loop05
+ioctl_loop06 ioctl_loop06
 
 ioctl_ns01 ioctl_ns01
 ioctl_ns02 ioctl_ns02

testcases/kernel/syscalls/ioctl/.gitignore

@@ -11,6 +11,7 @@
 /ioctl_loop03
 /ioctl_loop04
 /ioctl_loop05
+/ioctl_loop06
 /ioctl_ns01
 /ioctl_ns02
 /ioctl_ns03

testcases/kernel/syscalls/ioctl/ioctl_loop06.c

@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2020 FUJITSU LIMITED. All rights reserved.
+ * Author: Yang Xu <[email protected]>
+ *
+ * This is a basic ioctl error test about loopdevice
+ * LOOP_SET_BLOCK_SIZE.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include "lapi/loop.h"
+#include "tst_test.h"
+
+static char dev_path[1024];
+static int dev_num, dev_fd, attach_flag;
+static unsigned int invalid_value, half_value, unalign_value;
+
+static struct tcase {
+	unsigned int *setvalue;
+	int exp_err;
+	char *message;
+} tcases[] = {
+	{&half_value, EINVAL, "arg < 512"},
+	{&invalid_value, EINVAL, "arg > PAGE_SIZE"},
+	{&unalign_value, EINVAL, "arg != power_of_2"},
+};
+
+static void verify_ioctl_loop(unsigned int n)
+{
+	struct tcase *tc = &tcases[n];
+
+	tst_res(TINFO, "%s", tc->message);
+	TEST(ioctl(dev_fd, LOOP_SET_BLOCK_SIZE, *(tc->setvalue)));
+	if (TST_RET == 0) {
+		tst_res(TFAIL, "LOOP_SET_BLOCK_SIZE succeed unexpectedly");
+		return;
+	}
+
+	if (TST_ERR == tc->exp_err) {
+		tst_res(TPASS | TTERRNO, "LOOP_SET_BLOCK_SIZE failed as expected");
+	} else {
+		tst_res(TFAIL | TTERRNO, "LOOP_SET_BLOCK_SIZE failed expected %s got",
+				tst_strerrno(tc->exp_err));
+	}
+}
+
+static void setup(void)
+{
+	unsigned int pg_size;
+
+	dev_num = tst_find_free_loopdev(dev_path, sizeof(dev_path));
+	if (dev_num < 0)
+		tst_brk(TBROK, "Failed to find free loop device");
+
+	tst_fill_file("test.img", 0, 1024, 1024);
+	tst_attach_device(dev_path, "test.img");
+	attach_flag = 1;
+	half_value = 256;
+	pg_size = getpagesize();
+	invalid_value = pg_size * 2 ;
+	unalign_value = pg_size - 1;
+
+	dev_fd = SAFE_OPEN(dev_path, O_RDWR);
+
+	if (ioctl(dev_fd, LOOP_SET_BLOCK_SIZE, 512) && errno == EINVAL)
+		tst_brk(TCONF, "LOOP_SET_BLOCK_SIZE is not supported");
+}
+
+static void cleanup(void)
+{
+	if (dev_fd > 0)
+		SAFE_CLOSE(dev_fd);
+	if (attach_flag)
+		tst_detach_device(dev_path);
+}
+
+static struct tst_test test = {
+	.setup = setup,
+	.cleanup = cleanup,
+	.test = verify_ioctl_loop,
+	.tcnt = ARRAY_SIZE(tcases),
+	.needs_root = 1,
+	.needs_tmpdir = 1,
+	.needs_drivers = (const char *const []) {
+		"loop",
+		NULL
+	}
+};