Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
selftests/namespaces: verify initial namespace inode numbers
Make sure that all works correctly.
Signed-off-by: Christian Brauner <brauner@kernel.org>
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tools/testing/selftests/namespaces/.gitignore
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tools/testing/selftests/namespaces/.gitignore
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tools/testing/selftests/namespaces/Makefile
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tools/testing/selftests/namespaces/Makefile
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tools/testing/selftests/namespaces/init_ino_test.c
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tools/testing/selftests/namespaces/init_ino_test.c
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// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright (c) 2025 Christian Brauner <brauner@kernel.org>
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#define _GNU_SOURCE
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <linux/nsfs.h>
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#include "../kselftest_harness.h"
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struct ns_info {
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const char *name;
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const char *proc_path;
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unsigned int expected_ino;
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};
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static struct ns_info namespaces[] = {
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{ "ipc", "/proc/1/ns/ipc", IPC_NS_INIT_INO },
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{ "uts", "/proc/1/ns/uts", UTS_NS_INIT_INO },
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{ "user", "/proc/1/ns/user", USER_NS_INIT_INO },
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{ "pid", "/proc/1/ns/pid", PID_NS_INIT_INO },
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{ "cgroup", "/proc/1/ns/cgroup", CGROUP_NS_INIT_INO },
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{ "time", "/proc/1/ns/time", TIME_NS_INIT_INO },
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{ "net", "/proc/1/ns/net", NET_NS_INIT_INO },
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{ "mnt", "/proc/1/ns/mnt", MNT_NS_INIT_INO },
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};
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TEST(init_namespace_inodes)
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{
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struct stat st;
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for (int i = 0; i < sizeof(namespaces) / sizeof(namespaces[0]); i++) {
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int ret = stat(namespaces[i].proc_path, &st);
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/* Some namespaces might not be available (e.g., time namespace on older kernels) */
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if (ret < 0) {
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if (errno == ENOENT) {
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ksft_test_result_skip("%s namespace not available\n",
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namespaces[i].name);
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continue;
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}
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ASSERT_GE(ret, 0)
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TH_LOG("Failed to stat %s: %s",
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namespaces[i].proc_path, strerror(errno));
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}
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ASSERT_EQ(st.st_ino, namespaces[i].expected_ino)
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TH_LOG("Namespace %s has inode 0x%lx, expected 0x%x",
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namespaces[i].name, st.st_ino, namespaces[i].expected_ino);
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ksft_print_msg("Namespace %s: inode 0x%lx matches expected 0x%x\n",
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namespaces[i].name, st.st_ino, namespaces[i].expected_ino);
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}
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}
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TEST_HARNESS_MAIN