// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (c) 2020 FUJITSU LIMITED. All rights reserved. * Author: Yang Xu * * This is a basic ioctl test about loopdevice LOOP_SET_STATUS64 * and LOOP_GET_STATUS64. * Test its lo_sizelimit field. If lo_sizelimit is 0,it means max * available. If sizelimit is less than loop_size, loopsize will * be truncated. */ #include #include #include #include #include "lapi/loop.h" #include "tst_test.h" static char dev_path[1024], sys_loop_sizepath[1024], sys_loop_sizelimitpath[1024]; static int dev_num, dev_fd, file_fd, attach_flag; static struct tcase { unsigned int set_sizelimit; unsigned int exp_loopsize; char *message; } tcases[] = { {1024 * 4096, 2048, "When sizelimit is greater than loopsize "}, {1024 * 512, 1024, "When sizelimit is less than loopsize"}, }; static void verify_ioctl_loop(unsigned int n) { struct tcase *tc = &tcases[n]; struct loop_info64 loopinfo, loopinfoget; tst_res(TINFO, "%s", tc->message); memset(&loopinfo, 0, sizeof(loopinfo)); memset(&loopinfoget, 0, sizeof(loopinfoget)); loopinfo.lo_sizelimit = tc->set_sizelimit; TST_RETRY_FUNC(ioctl(dev_fd, LOOP_SET_STATUS64, &loopinfo), TST_RETVAL_EQ0); TST_ASSERT_INT(sys_loop_sizepath, tc->exp_loopsize); TST_ASSERT_INT(sys_loop_sizelimitpath, tc->set_sizelimit); SAFE_IOCTL(dev_fd, LOOP_GET_STATUS64, &loopinfoget); if (loopinfoget.lo_sizelimit == tc->set_sizelimit) tst_res(TPASS, "LOOP_GET_STATUS64 gets correct lo_sizelimit(%d)", tc->set_sizelimit); else tst_res(TFAIL, "LOOP_GET_STATUS64 gets wrong lo_sizelimit(%llu), expect %d", loopinfoget.lo_sizelimit, tc->set_sizelimit); /*Reset*/ loopinfo.lo_sizelimit = 0; TST_RETRY_FUNC(ioctl(dev_fd, LOOP_SET_STATUS, &loopinfo), TST_RETVAL_EQ0); } static void setup(void) { 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, 1); tst_attach_device(dev_path, "test.img"); attach_flag = 1; sprintf(sys_loop_sizepath, "/sys/block/loop%d/size", dev_num); sprintf(sys_loop_sizelimitpath, "/sys/block/loop%d/loop/sizelimit", dev_num); dev_fd = SAFE_OPEN(dev_path, O_RDWR); tst_res(TINFO, "original loop size 2048 sectors"); } static void cleanup(void) { if (dev_fd > 0) SAFE_CLOSE(dev_fd); if (file_fd > 0) SAFE_CLOSE(file_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 } };