89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
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* Copyright (c) 2014 Cyril Hrubis <chrubis@suse.cz>
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* Author: Nirmala Devi Dhanasekar <nirmala.devi@wipro.com>
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*
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* Check for basic errors returned by umount(2) system call.
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*
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* Verify that umount(2) returns -1 and sets errno to
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* 1) EBUSY if it cannot be umounted, because dir is still busy.
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* 2) EFAULT if specialfile or device file points to invalid address space.
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* 3) ENOENT if pathname was empty or has a nonexistent component.
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* 4) EINVAL if specialfile or device is invalid or not a mount point.
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* 5) ENAMETOOLONG if pathname was longer than MAXPATHLEN.
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*/
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#include <errno.h>
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#include <string.h>
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#include <sys/mount.h>
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#include "tst_test.h"
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#define MNTPOINT "mntpoint"
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static char long_path[PATH_MAX + 2];
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static int mount_flag;
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static int fd;
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static struct tcase {
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const char *err_desc;
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const char *mntpoint;
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int exp_errno;
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} tcases[] = {
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{"Already mounted/busy", MNTPOINT, EBUSY},
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{"Invalid address", NULL, EFAULT},
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{"Directory not found", "nonexistent", ENOENT},
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{"Invalid device", "./", EINVAL},
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{"Pathname too long", long_path, ENAMETOOLONG}
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};
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static void verify_umount(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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TEST(umount(tc->mntpoint));
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if (TST_RET != -1) {
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tst_res(TFAIL, "umount() succeeds unexpectedly");
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return;
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}
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if (tc->exp_errno != TST_ERR) {
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tst_res(TFAIL | TTERRNO, "umount() should fail with %s",
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tst_strerrno(tc->exp_errno));
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return;
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}
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tst_res(TPASS | TTERRNO, "umount() fails as expected: %s",
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tc->err_desc);
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}
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static void setup(void)
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{
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memset(long_path, 'a', PATH_MAX + 1);
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SAFE_MKDIR(MNTPOINT, 0775);
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SAFE_MOUNT(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, NULL);
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mount_flag = 1;
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fd = SAFE_CREAT(MNTPOINT "/file", 0777);
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}
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static void cleanup(void)
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{
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if (fd > 0)
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SAFE_CLOSE(fd);
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if (mount_flag)
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tst_umount(MNTPOINT);
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.needs_root = 1,
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.format_device = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test = verify_umount,
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};
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