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