89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2019 Federico Bonfiglio fedebonfi95@gmail.com
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*/
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/*
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* Test ioctl_ns with NS_GET_PARENT request.
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*
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* Parent process tries to get parent of initial namespace, which should
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* fail with EPERM because it has no parent.
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*
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* Child process has a new pid namespace, which should make the call fail
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* with EPERM error.
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*
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*/
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#define _GNU_SOURCE
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#include <errno.h>
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#include <sched.h>
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#include <stdlib.h>
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#include "tst_test.h"
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#include "lapi/ioctl_ns.h"
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#include "lapi/namespaces_constants.h"
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#define STACK_SIZE (1024 * 1024)
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static char *child_stack;
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static void setup(void)
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{
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int exists = access("/proc/self/ns/pid", F_OK);
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if (exists < 0)
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tst_res(TCONF, "namespace not available");
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child_stack = ltp_alloc_stack(STACK_SIZE);
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if (!child_stack)
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tst_brk(TBROK|TERRNO, "stack alloc");
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}
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static void cleanup(void)
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{
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free(child_stack);
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}
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static void test_ns_get_parent(void)
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{
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int fd, parent_fd;
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fd = SAFE_OPEN("/proc/self/ns/pid", O_RDONLY);
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parent_fd = ioctl(fd, NS_GET_PARENT);
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if (parent_fd == -1) {
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if (errno == ENOTTY)
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tst_brk(TCONF, "ioctl(NS_GET_PARENT) not implemented");
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if (errno == EPERM)
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tst_res(TPASS, "NS_GET_PARENT fails with EPERM");
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else
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tst_res(TFAIL | TERRNO, "unexpected ioctl error");
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} else {
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SAFE_CLOSE(fd);
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tst_res(TFAIL, "call to ioctl succeded");
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}
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}
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static int child(void *arg LTP_ATTRIBUTE_UNUSED)
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{
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test_ns_get_parent();
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return 0;
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}
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static void run(void)
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{
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test_ns_get_parent();
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if (ltp_clone(CLONE_NEWPID | SIGCHLD, &child, 0,
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STACK_SIZE, child_stack) == -1)
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tst_brk(TBROK | TERRNO, "ltp_clone failed");
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}
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static struct tst_test test = {
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.test_all = run,
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.forks_child = 1,
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.needs_root = 1,
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.min_kver = "4.9",
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.setup = setup,
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.cleanup = cleanup,
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};
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