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 * Test whether writefd is set by select() when eventfd() counter value is 13f08c3bdfSopenharmony_ci * not the maximum value, then check if writefd is not set when eventfd() 14f08c3bdfSopenharmony_ci * counter value is maximum value. 15f08c3bdfSopenharmony_ci */ 16f08c3bdfSopenharmony_ci 17f08c3bdfSopenharmony_ci#include <stdlib.h> 18f08c3bdfSopenharmony_ci#include <sys/eventfd.h> 19f08c3bdfSopenharmony_ci#include "tst_test.h" 20f08c3bdfSopenharmony_ci 21f08c3bdfSopenharmony_cistatic void run(void) 22f08c3bdfSopenharmony_ci{ 23f08c3bdfSopenharmony_ci int fd; 24f08c3bdfSopenharmony_ci fd_set writefds; 25f08c3bdfSopenharmony_ci uint64_t val; 26f08c3bdfSopenharmony_ci uint64_t non_max = 10; 27f08c3bdfSopenharmony_ci uint64_t max = UINT64_MAX - 1; 28f08c3bdfSopenharmony_ci struct timeval timeout = { 0, 0 }; 29f08c3bdfSopenharmony_ci 30f08c3bdfSopenharmony_ci fd = TST_EXP_FD(eventfd(0, EFD_NONBLOCK)); 31f08c3bdfSopenharmony_ci 32f08c3bdfSopenharmony_ci FD_ZERO(&writefds); 33f08c3bdfSopenharmony_ci FD_SET(fd, &writefds); 34f08c3bdfSopenharmony_ci 35f08c3bdfSopenharmony_ci SAFE_WRITE(0, fd, &non_max, sizeof(non_max)); 36f08c3bdfSopenharmony_ci TEST(select(fd + 1, NULL, &writefds, NULL, &timeout)); 37f08c3bdfSopenharmony_ci if (TST_RET == -1) 38f08c3bdfSopenharmony_ci tst_brk(TBROK | TERRNO, "select"); 39f08c3bdfSopenharmony_ci 40f08c3bdfSopenharmony_ci TST_EXP_EQ_LI(FD_ISSET(fd, &writefds), 1); 41f08c3bdfSopenharmony_ci 42f08c3bdfSopenharmony_ci SAFE_READ(0, fd, &val, sizeof(val)); 43f08c3bdfSopenharmony_ci SAFE_WRITE(0, fd, &max, sizeof(max)); 44f08c3bdfSopenharmony_ci 45f08c3bdfSopenharmony_ci TEST(select(fd + 1, NULL, &writefds, NULL, &timeout)); 46f08c3bdfSopenharmony_ci if (TST_RET == -1) 47f08c3bdfSopenharmony_ci tst_brk(TBROK | TERRNO, "select"); 48f08c3bdfSopenharmony_ci 49f08c3bdfSopenharmony_ci TST_EXP_EQ_LI(FD_ISSET(fd, &writefds), 0); 50f08c3bdfSopenharmony_ci 51f08c3bdfSopenharmony_ci SAFE_CLOSE(fd); 52f08c3bdfSopenharmony_ci} 53f08c3bdfSopenharmony_ci 54f08c3bdfSopenharmony_cistatic struct tst_test test = { 55f08c3bdfSopenharmony_ci .test_all = run, 56f08c3bdfSopenharmony_ci .needs_kconfigs = (const char *[]) { 57f08c3bdfSopenharmony_ci "CONFIG_EVENTFD", 58f08c3bdfSopenharmony_ci NULL 59f08c3bdfSopenharmony_ci }, 60f08c3bdfSopenharmony_ci}; 61