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