diff options
Diffstat (limited to 'kernel/tests/testcases/kernel/syscalls/ioctl/ioctl_loop01.c')
| -rw-r--r-- | kernel/tests/testcases/kernel/syscalls/ioctl/ioctl_loop01.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/kernel/tests/testcases/kernel/syscalls/ioctl/ioctl_loop01.c b/kernel/tests/testcases/kernel/syscalls/ioctl/ioctl_loop01.c new file mode 100644 index 0000000..cf71184 --- /dev/null +++ b/kernel/tests/testcases/kernel/syscalls/ioctl/ioctl_loop01.c @@ -0,0 +1,155 @@ +// 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 loopdevice. + * It is designed to test LO_FLAGS_AUTOCLEAR and LO_FLAGS_PARTSCAN flag. + * + * For LO_FLAGS_AUTOCLEAR flag, we only check autoclear field value in sys + * directory and also get lo_flags by using LOOP_GET_STATUS. + * + * For LO_FLAGS_PARTSCAN flag, it is the same as LO_FLAGS_AUTOCLEAR flag. + * But we also check whether we can scan partition table correctly ie check + * whether /dev/loopnp1 and /sys/bloclk/loop0/loop0p1 existed. + * + * For LO_FLAGS_AUTOCLEAR flag, it can be clear. For LO_FLAGS_PARTSCAN flag, + * it cannot be clear. We also check this. + * + * It is also a regression test for kernel + * commit 10c70d95c0f2 ("block: remove the bd_openers checks in blk_drop_partitions") + * commit 6ac92fb5cdff ("loop: Fix wrong masking of status flags"). + */ + +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include "lapi/loop.h" +#include "tst_test.h" + +static char dev_path[1024], backing_path[1024], backing_file_path[1024]; +static int dev_num, attach_flag, dev_fd, parted_sup; + +/* + * In drivers/block/loop.c code, set status function doesn't handle + * LO_FLAGS_READ_ONLY flag and ingore it. Only loop_set_fd with read only mode + * file_fd, lo_flags will include LO_FLAGS_READ_ONLY and it's the same for + * LO_FLAGS_DIRECT_IO. + */ +#define SET_FLAGS (LO_FLAGS_AUTOCLEAR | LO_FLAGS_PARTSCAN | LO_FLAGS_READ_ONLY | LO_FLAGS_DIRECT_IO) +#define GET_FLAGS (LO_FLAGS_AUTOCLEAR | LO_FLAGS_PARTSCAN) + +static char partscan_path[1024], autoclear_path[1024]; +static char loop_partpath[1026], sys_loop_partpath[1026]; + +static void check_loop_value(int set_flag, int get_flag, int autoclear_field) +{ + struct loop_info loopinfo = {0}, loopinfoget = {0}; + int ret; + + loopinfo.lo_flags = set_flag; + SAFE_IOCTL(dev_fd, LOOP_SET_STATUS, &loopinfo); + SAFE_IOCTL(dev_fd, LOOP_GET_STATUS, &loopinfoget); + + if (loopinfoget.lo_flags & ~get_flag) + tst_res(TFAIL, "expect %d but got %d", get_flag, loopinfoget.lo_flags); + else + tst_res(TPASS, "get expected lo_flag %d", loopinfoget.lo_flags); + + TST_ASSERT_INT(partscan_path, 1); + TST_ASSERT_INT(autoclear_path, autoclear_field); + + if (!parted_sup) { + tst_res(TINFO, "Current environment doesn't have parted disk, skip it"); + return; + } + + ret = TST_RETRY_FN_EXP_BACKOFF(access(loop_partpath, F_OK), TST_RETVAL_EQ0, 30); + if (ret == 0) + tst_res(TPASS, "access %s succeeds", loop_partpath); + else + tst_res(TFAIL, "access %s fails", loop_partpath); + + ret = TST_RETRY_FN_EXP_BACKOFF(access(sys_loop_partpath, F_OK), TST_RETVAL_EQ0, 30); + if (ret == 0) + tst_res(TPASS, "access %s succeeds", sys_loop_partpath); + else + tst_res(TFAIL, "access %s fails", sys_loop_partpath); +} + +static void verify_ioctl_loop(void) +{ + tst_attach_device(dev_path, "test.img"); + attach_flag = 1; + + TST_ASSERT_INT(partscan_path, 0); + TST_ASSERT_INT(autoclear_path, 0); + TST_ASSERT_STR(backing_path, backing_file_path); + + check_loop_value(SET_FLAGS, GET_FLAGS, 1); + + tst_res(TINFO, "Test flag can be clear"); + check_loop_value(0, LO_FLAGS_PARTSCAN, 0); + + tst_detach_device_by_fd(dev_path, dev_fd); + attach_flag = 0; +} + +static void setup(void) +{ + int ret; + const char *const cmd_parted[] = {"parted", "-s", "test.img", "mklabel", "msdos", "mkpart", + "primary", "ext4", "1M", "10M", NULL}; + + 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, 10); + + ret = tst_cmd(cmd_parted, NULL, NULL, TST_CMD_PASS_RETVAL); + switch (ret) { + case 0: + parted_sup = 1; + break; + case 255: + tst_res(TCONF, "parted binary not installed or failed"); + break; + default: + tst_res(TCONF, "parted exited with %i", ret); + break; + } + + sprintf(partscan_path, "/sys/block/loop%d/loop/partscan", dev_num); + sprintf(autoclear_path, "/sys/block/loop%d/loop/autoclear", dev_num); + sprintf(backing_path, "/sys/block/loop%d/loop/backing_file", dev_num); + sprintf(sys_loop_partpath, "/sys/block/loop%d/loop%dp1", dev_num, dev_num); + sprintf(backing_file_path, "%s/test.img", tst_get_tmpdir()); + sprintf(loop_partpath, "%sp1", dev_path); + dev_fd = SAFE_OPEN(dev_path, O_RDWR); +} + +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_all = verify_ioctl_loop, + .needs_root = 1, + .needs_drivers = (const char *const []) { + "loop", + NULL + }, + .tags = (const struct tst_tag[]) { + {"linux-git", "10c70d95c0f2"}, + {"linux-git", "6ac92fb5cdff"}, + {} + }, + .needs_tmpdir = 1, +}; |