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1/* SPDX-License-Identifier: GPL-2.0 */2 3#ifndef _CLONE3_SELFTESTS_H4#define _CLONE3_SELFTESTS_H5 6#define _GNU_SOURCE7#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_clone319#define __NR_clone3 -120#endif21 22struct __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 36static 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 43static 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("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, sizeof(args));54 if (!pid)55 exit(EXIT_SUCCESS);56 57 if (pid > 0) {58 wait(NULL);59 ksft_exit_fail_msg(60 "Managed to create child process with invalid exit_signal\n");61 }62 63 if (errno == ENOSYS)64 ksft_exit_skip("clone3() syscall is not supported\n");65 66 ksft_print_msg("clone3() syscall supported\n");67}68 69#endif /* _CLONE3_SELFTESTS_H */70