65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2014 Red Hat, Inc.
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* Copyright (C) 2021 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
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*/
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/*\
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* [Description]
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*
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* Tests an unbindable mount: unbindable mount is an unbindable
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* private mount.
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*
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* - Creates directories DIRA, DIRB and files DIRA/"A", DIRB/"B"
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* - Unshares mount namespace and makes it private (so mounts/umounts have no
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* effect on a real system)
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* - Bind mounts directory DIRA to DIRA
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* - Makes directory DIRA unbindable
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* - Check if bind mount unbindable DIRA to DIRB fails as expected
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*/
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#include <sys/wait.h>
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#include <sys/mount.h>
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#include "mountns.h"
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#include "tst_test.h"
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static void run(void)
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{
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SAFE_UNSHARE(CLONE_NEWNS);
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/* makes sure mounts/umounts have no effect on a real system */
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SAFE_MOUNT("none", "/", "none", MS_REC | MS_PRIVATE, NULL);
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SAFE_MOUNT(DIRA, DIRA, "none", MS_BIND, NULL);
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SAFE_MOUNT("none", DIRA, "none", MS_UNBINDABLE, NULL);
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if (mount(DIRA, DIRB, "none", MS_BIND, NULL) == -1) {
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tst_res(TPASS, "unbindable mount passed");
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} else {
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SAFE_UMOUNT(DIRB);
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tst_res(TFAIL, "unbindable mount faled");
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}
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SAFE_UMOUNT(DIRA);
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}
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static void setup(void)
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{
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check_newns();
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create_folders();
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}
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static void cleanup(void)
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{
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umount_folders();
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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 = run,
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.needs_root = 1,
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.needs_tmpdir = 1,
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};
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