1 // SPDX-License-Identifier: GPL-2.0-or-later 2 // Copyright (c) 2025 Christian Brauner <brauner@kernel.org> 3 4 #define _GNU_SOURCE 5 #include <fcntl.h> 6 #include <stdio.h> 7 #include <stdlib.h> 8 #include <sys/stat.h> 9 #include <unistd.h> 10 #include <errno.h> 11 #include <string.h> 12 #include <linux/nsfs.h> 13 14 #include "../kselftest_harness.h" 15 16 struct ns_info { 17 const char *name; 18 const char *proc_path; 19 unsigned int expected_ino; 20 }; 21 22 static struct ns_info namespaces[] = { 23 { "ipc", "/proc/1/ns/ipc", IPC_NS_INIT_INO }, 24 { "uts", "/proc/1/ns/uts", UTS_NS_INIT_INO }, 25 { "user", "/proc/1/ns/user", USER_NS_INIT_INO }, 26 { "pid", "/proc/1/ns/pid", PID_NS_INIT_INO }, 27 { "cgroup", "/proc/1/ns/cgroup", CGROUP_NS_INIT_INO }, 28 { "time", "/proc/1/ns/time", TIME_NS_INIT_INO }, 29 { "net", "/proc/1/ns/net", NET_NS_INIT_INO }, 30 { "mnt", "/proc/1/ns/mnt", MNT_NS_INIT_INO }, 31 }; 32 33 TEST(init_namespace_inodes) 34 { 35 struct stat st; 36 37 for (int i = 0; i < sizeof(namespaces) / sizeof(namespaces[0]); i++) { 38 int ret = stat(namespaces[i].proc_path, &st); 39 40 /* Some namespaces might not be available (e.g., time namespace on older kernels) */ 41 if (ret < 0) { 42 if (errno == ENOENT) { 43 ksft_test_result_skip("%s namespace not available\n", 44 namespaces[i].name); 45 continue; 46 } 47 ASSERT_GE(ret, 0) 48 TH_LOG("Failed to stat %s: %s", 49 namespaces[i].proc_path, strerror(errno)); 50 } 51 52 ASSERT_EQ(st.st_ino, namespaces[i].expected_ino) 53 TH_LOG("Namespace %s has inode 0x%lx, expected 0x%x", 54 namespaces[i].name, st.st_ino, namespaces[i].expected_ino); 55 56 ksft_print_msg("Namespace %s: inode 0x%lx matches expected 0x%x\n", 57 namespaces[i].name, st.st_ino, namespaces[i].expected_ino); 58 } 59 } 60 61 TEST_HARNESS_MAIN 62