1f08c3bdfSopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 2f08c3bdfSopenharmony_ci/* 3f08c3bdfSopenharmony_ci * Copyright (c) International Business Machines Corp., 2001 4f08c3bdfSopenharmony_ci * Copyright (c) 2008 Vijay Kumar B. <vijaykumar@bravegnu.org> 5f08c3bdfSopenharmony_ci * Copyright (c) Linux Test Project, 2008-2022 6f08c3bdfSopenharmony_ci * Copyright (C) 2023 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com> 7f08c3bdfSopenharmony_ci */ 8f08c3bdfSopenharmony_ci 9f08c3bdfSopenharmony_ci/*\ 10f08c3bdfSopenharmony_ci * [Description] 11f08c3bdfSopenharmony_ci * 12f08c3bdfSopenharmony_ci * Verify read operation for eventfd fail with: 13f08c3bdfSopenharmony_ci * 14f08c3bdfSopenharmony_ci * - EAGAIN when counter is zero on non blocking fd 15f08c3bdfSopenharmony_ci * - EINVAL when buffer size is less than 8 bytes 16f08c3bdfSopenharmony_ci */ 17f08c3bdfSopenharmony_ci 18f08c3bdfSopenharmony_ci#include <stdlib.h> 19f08c3bdfSopenharmony_ci#include <sys/eventfd.h> 20f08c3bdfSopenharmony_ci#include "tst_test.h" 21f08c3bdfSopenharmony_ci 22f08c3bdfSopenharmony_ci#define EVENT_COUNT 10 23f08c3bdfSopenharmony_ci 24f08c3bdfSopenharmony_cistatic void run(void) 25f08c3bdfSopenharmony_ci{ 26f08c3bdfSopenharmony_ci int fd; 27f08c3bdfSopenharmony_ci uint64_t val; 28f08c3bdfSopenharmony_ci uint32_t invalid; 29f08c3bdfSopenharmony_ci 30f08c3bdfSopenharmony_ci fd = TST_EXP_FD(eventfd(EVENT_COUNT, EFD_NONBLOCK)); 31f08c3bdfSopenharmony_ci 32f08c3bdfSopenharmony_ci SAFE_READ(0, fd, &val, sizeof(val)); 33f08c3bdfSopenharmony_ci TST_EXP_EQ_LI(val, EVENT_COUNT); 34f08c3bdfSopenharmony_ci 35f08c3bdfSopenharmony_ci TST_EXP_FAIL(read(fd, &val, sizeof(val)), EAGAIN); 36f08c3bdfSopenharmony_ci TST_EXP_FAIL(read(fd, &invalid, sizeof(invalid)), EINVAL); 37f08c3bdfSopenharmony_ci 38f08c3bdfSopenharmony_ci SAFE_CLOSE(fd); 39f08c3bdfSopenharmony_ci} 40f08c3bdfSopenharmony_ci 41f08c3bdfSopenharmony_cistatic struct tst_test test = { 42f08c3bdfSopenharmony_ci .test_all = run, 43f08c3bdfSopenharmony_ci .needs_kconfigs = (const char *[]) { 44f08c3bdfSopenharmony_ci "CONFIG_EVENTFD", 45f08c3bdfSopenharmony_ci NULL 46f08c3bdfSopenharmony_ci }, 47f08c3bdfSopenharmony_ci}; 48