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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2020 FUJITSU LIMITED. All rights reserved.
* Author: Yang Xu <xuyang2018.jy@cn.jujitsu.com>
*
* This is a basic ioctl test about xloopdevice.
*
* It is designed to test XLOOP_SET_CAPACITY can update a live
* xloop device size when we change the size of the underlying
* backing file. Also check sys value.
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include "lapi/xloop.h"
#include "tst_test.h"
#define OLD_SIZE 10240
#define NEW_SIZE 5120
static char dev_path[1024], sys_xloop_sizepath[1024];
static char *wrbuf;
static int dev_num, dev_fd, file_fd, attach_flag;
static void verify_ioctl_xloop(void)
{
struct xloop_info xloopinfoget;
memset(&xloopinfoget, 0, sizeof(xloopinfoget));
tst_fill_file("test.img", 0, 1024, OLD_SIZE/1024);
tst_attach_device(dev_path, "test.img");
attach_flag = 1;
TST_ASSERT_INT(sys_xloop_sizepath, OLD_SIZE/512);
file_fd = SAFE_OPEN("test.img", O_RDWR);
SAFE_IOCTL(dev_fd, XLOOP_GET_STATUS, &xloopinfoget);
if (xloopinfoget.xlo_flags & XLO_FLAGS_READ_ONLY)
tst_brk(TCONF, "Current environment has unexpected XLO_FLAGS_READ_ONLY flag");
SAFE_TRUNCATE("test.img", NEW_SIZE);
SAFE_IOCTL(dev_fd, XLOOP_SET_CAPACITY);
SAFE_LSEEK(dev_fd, 0, SEEK_SET);
/*check that we can't write data beyond 5K into xloop device*/
TEST(write(dev_fd, wrbuf, OLD_SIZE));
if (TST_RET == NEW_SIZE) {
tst_res(TPASS, "XLOOP_SET_CAPACITY set xloop size to %d", NEW_SIZE);
} else {
tst_res(TFAIL, "XLOOP_SET_CAPACITY didn't set xloop size to %d, its size is %ld",
NEW_SIZE, TST_RET);
}
TST_ASSERT_INT(sys_xloop_sizepath, NEW_SIZE/512);
SAFE_CLOSE(file_fd);
tst_detach_device_by_fd(dev_path, dev_fd);
unlink("test.img");
attach_flag = 0;
}
static void setup(void)
{
dev_num = tst_find_free_xloopdev(dev_path, sizeof(dev_path));
if (dev_num < 0)
tst_brk(TBROK, "Failed to find free xloop device");
wrbuf = SAFE_MALLOC(OLD_SIZE);
memset(wrbuf, 'x', OLD_SIZE);
sprintf(sys_xloop_sizepath, "/sys/block/xloop%d/size", dev_num);
dev_fd = SAFE_OPEN(dev_path, O_RDWR);
}
static void cleanup(void)
{
if (dev_fd > 0)
SAFE_CLOSE(dev_fd);
if (file_fd > 0)
SAFE_CLOSE(file_fd);
if (wrbuf)
free(wrbuf);
if (attach_flag)
tst_detach_device(dev_path);
}
static struct tst_test test = {
.setup = setup,
.cleanup = cleanup,
.test_all = verify_ioctl_xloop,
.needs_root = 1,
.needs_tmpdir = 1,
.needs_drivers = (const char *const []) {
"xloop",
"xloop_file_fmt_raw",
NULL
}
};
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