144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2020 FUJITSU LIMITED. All rights reserved.
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* Author: Yang Xu <xuyang2018.jy@cn.jujitsu.com>
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*
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* This is a basic error test about the invalid block size of loopdevice
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* by using LOOP_SET_BLOCK_SIZE or LOOP_CONFIGURE ioctl.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include "lapi/loop.h"
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#include "tst_test.h"
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static char dev_path[1024];
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static int dev_num, dev_fd, file_fd, attach_flag, loop_configure_sup = 1;
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static unsigned int invalid_value, half_value, unalign_value;
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static struct loop_config loopconfig;
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static struct tcase {
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unsigned int *setvalue;
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int ioctl_flag;
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char *message;
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} tcases[] = {
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{&half_value, LOOP_SET_BLOCK_SIZE,
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"Using LOOP_SET_BLOCK_SIZE with arg < 512"},
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{&invalid_value, LOOP_SET_BLOCK_SIZE,
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"Using LOOP_SET_BLOCK_SIZE with arg > PAGE_SIZE"},
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{&unalign_value, LOOP_SET_BLOCK_SIZE,
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"Using LOOP_SET_BLOCK_SIZE with arg != power_of_2"},
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{&half_value, LOOP_CONFIGURE,
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"Using LOOP_CONFIGURE with block_size < 512"},
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{&invalid_value, LOOP_CONFIGURE,
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"Using LOOP_CONFIGURE with block_size > PAGE_SIZE"},
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{&unalign_value, LOOP_CONFIGURE,
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"Using LOOP_CONFIGURE with block_size != power_of_2"},
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};
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static void verify_ioctl_loop(unsigned int n)
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{
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if (tcases[n].ioctl_flag == LOOP_CONFIGURE)
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TEST(ioctl(dev_fd, LOOP_CONFIGURE, &loopconfig));
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else
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TEST(ioctl(dev_fd, LOOP_SET_BLOCK_SIZE, *(tcases[n].setvalue)));
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if (TST_RET == 0) {
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tst_res(TFAIL, "Set block size succeed unexpectedly");
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if (tcases[n].ioctl_flag == LOOP_CONFIGURE)
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tst_detach_device_by_fd(dev_path, dev_fd);
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return;
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}
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if (TST_ERR == EINVAL)
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tst_res(TPASS | TTERRNO, "Set block size failed as expected");
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else
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tst_res(TFAIL | TTERRNO, "Set block size failed expected EINVAL got");
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}
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static void run(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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tst_res(TINFO, "%s", tc->message);
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if (tc->ioctl_flag == LOOP_SET_BLOCK_SIZE) {
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if (!attach_flag) {
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tst_attach_device(dev_path, "test.img");
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attach_flag = 1;
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}
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verify_ioctl_loop(n);
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return;
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}
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if (tc->ioctl_flag == LOOP_CONFIGURE && !loop_configure_sup) {
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tst_res(TCONF, "LOOP_CONFIGURE ioctl not supported");
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return;
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}
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if (attach_flag) {
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tst_detach_device_by_fd(dev_path, dev_fd);
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attach_flag = 0;
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}
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loopconfig.block_size = *(tc->setvalue);
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verify_ioctl_loop(n);
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}
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static void setup(void)
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{
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unsigned int pg_size;
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int ret;
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dev_num = tst_find_free_loopdev(dev_path, sizeof(dev_path));
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if (dev_num < 0)
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tst_brk(TBROK, "Failed to find free loop device");
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tst_fill_file("test.img", 0, 1024, 1024);
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half_value = 256;
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pg_size = getpagesize();
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invalid_value = pg_size * 2 ;
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unalign_value = pg_size - 1;
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dev_fd = SAFE_OPEN(dev_path, O_RDWR);
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if (ioctl(dev_fd, LOOP_SET_BLOCK_SIZE, 512) && errno == EINVAL)
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tst_brk(TCONF, "LOOP_SET_BLOCK_SIZE is not supported");
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file_fd = SAFE_OPEN("test.img", O_RDWR);
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loopconfig.fd = -1;
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ret = ioctl(dev_fd, LOOP_CONFIGURE, &loopconfig);
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if (ret && errno != EBADF) {
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tst_res(TINFO | TERRNO, "LOOP_CONFIGURE is not supported");
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loop_configure_sup = 0;
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return;
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}
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loopconfig.fd = file_fd;
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}
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static void cleanup(void)
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{
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if (dev_fd > 0)
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SAFE_CLOSE(dev_fd);
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if (file_fd > 0)
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SAFE_CLOSE(file_fd);
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if (attach_flag)
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tst_detach_device(dev_path);
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}
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static struct tst_test test = {
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.setup = setup,
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.cleanup = cleanup,
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.test = run,
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.tcnt = ARRAY_SIZE(tcases),
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.needs_root = 1,
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.needs_tmpdir = 1,
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.needs_drivers = (const char *const []) {
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"loop",
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NULL
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}
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};
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