| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | |
| 3 | #ifndef _CLONE3_SELFTESTS_H |
| 4 | #define _CLONE3_SELFTESTS_H |
| 5 | |
| 6 | #define _GNU_SOURCE |
| 7 | #include <sched.h> |
| 8 | #include <linux/sched.h> |
| 9 | #include <linux/types.h> |
| 10 | #include <stdint.h> |
| 11 | #include <syscall.h> |
| 12 | #include <sys/wait.h> |
| 13 | |
| 14 | #include "../kselftest.h" |
| 15 | |
| 16 | #define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr))) |
| 17 | |
| 18 | #ifndef __NR_clone3 |
| 19 | #define __NR_clone3 -1 |
| 20 | #endif |
| 21 | |
| 22 | struct __clone_args { |
| 23 | __aligned_u64 flags; |
| 24 | __aligned_u64 pidfd; |
| 25 | __aligned_u64 child_tid; |
| 26 | __aligned_u64 parent_tid; |
| 27 | __aligned_u64 exit_signal; |
| 28 | __aligned_u64 stack; |
| 29 | __aligned_u64 stack_size; |
| 30 | __aligned_u64 tls; |
| 31 | __aligned_u64 set_tid; |
| 32 | __aligned_u64 set_tid_size; |
| 33 | __aligned_u64 cgroup; |
| 34 | }; |
| 35 | |
| 36 | static pid_t sys_clone3(struct __clone_args *args, size_t size) |
| 37 | { |
| 38 | fflush(stdout); |
| 39 | fflush(stderr); |
| 40 | return syscall(__NR_clone3, args, size); |
| 41 | } |
| 42 | |
| 43 | static inline void test_clone3_supported(void) |
| 44 | { |
| 45 | pid_t pid; |
| 46 | struct __clone_args args = {}; |
| 47 | |
| 48 | if (__NR_clone3 < 0) |
| 49 | ksft_exit_skip(msg: "clone3() syscall is not supported\n"); |
| 50 | |
| 51 | /* Set to something that will always cause EINVAL. */ |
| 52 | args.exit_signal = -1; |
| 53 | pid = sys_clone3(args: &args, size: sizeof(args)); |
| 54 | if (!pid) |
| 55 | exit(EXIT_SUCCESS); |
| 56 | |
| 57 | if (pid > 0) { |
| 58 | wait(NULL); |
| 59 | ksft_exit_fail_msg( |
| 60 | msg: "Managed to create child process with invalid exit_signal\n"); |
| 61 | } |
| 62 | |
| 63 | if (errno == ENOSYS) |
| 64 | ksft_exit_skip(msg: "clone3() syscall is not supported\n"); |
| 65 | |
| 66 | ksft_print_msg(msg: "clone3() syscall supported\n"); |
| 67 | } |
| 68 | |
| 69 | #endif /* _CLONE3_SELFTESTS_H */ |
| 70 |