// 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