71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Linux Test Project, 2021
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* Author: Xie Ziyao <ziyaoxie@outlook.com>
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*/
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/*\
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* [Description]
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*
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* Verify that the maximum number of nesting allowed inside epoll sets is 5,
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* otherwise epoll_ctl fails with EINVAL.
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*/
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#include <poll.h>
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#include <sys/epoll.h>
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#include "tst_test.h"
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#define MAX_DEPTH 5
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static int epfd, new_epfd;
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static int fd[2];
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static struct epoll_event events = {.events = EPOLLIN};
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static void setup(void)
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{
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int depth;
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SAFE_PIPE(fd);
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for (depth = 0, epfd = fd[0]; depth < MAX_DEPTH; depth++) {
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new_epfd = epoll_create(1);
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if (new_epfd == -1)
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tst_brk(TBROK | TERRNO, "fail to create epoll instance");
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events.data.fd = epfd;
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if (epoll_ctl(new_epfd, EPOLL_CTL_ADD, epfd, &events))
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tst_brk(TBROK | TERRNO, "epoll_clt(..., EPOLL_CTL_ADD, ...)");
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epfd = new_epfd;
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}
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}
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static void cleanup(void)
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{
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if (fd[0])
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SAFE_CLOSE(fd[0]);
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if (fd[1])
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SAFE_CLOSE(fd[1]);
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}
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static void verify_epoll_ctl(void)
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{
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new_epfd = epoll_create(1);
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if (new_epfd == -1)
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tst_brk(TBROK | TERRNO, "fail to create epoll instance");
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events.data.fd = epfd;
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TST_EXP_FAIL(epoll_ctl(new_epfd, EPOLL_CTL_ADD, epfd, &events), EINVAL,
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"epoll_clt(..., EPOLL_CTL_ADD, ...) with number of nesting is 5");
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SAFE_CLOSE(new_epfd);
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}
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static struct tst_test test = {
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.setup = setup,
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.cleanup = cleanup,
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.test_all = verify_epoll_ctl,
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};
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