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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2016 Fujitsu Ltd.
* Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
*/
/*\
* [Description]
*
* Verify that epoll_ctl() fails with:
*
* - EBADF if epfd is an invalid fd.
* - EPERM if fd does not support epoll.
* - EBADF if fd is an invalid fd.
* - EINVAL if op is not supported.
* - EINVAL if fd is the same as epfd.
* - EINVAL if events is NULL.
* - ENOENT if fd is not registered with EPOLL_CTL_DEL.
* - ENOENT if fd is not registered with EPOLL_CTL_MOD.
* - EEXIST if fd is already registered with EPOLL_CTL_ADD.
*/
#include <poll.h>
#include <sys/epoll.h>
#include "tst_test.h"
static int epfd;
static int fd[2], unsupported_fd;
static int inv = -1;
static struct epoll_event events[2] = {
{.events = EPOLLIN},
{.events = EPOLLOUT},
};
static struct testcase {
int *epfd;
int opt;
int *fd;
struct epoll_event *event;
int exp_err;
const char *desc;
} tc[] = {
{&inv, EPOLL_CTL_ADD, &fd[1], &events[1], EBADF, "epfd is an invalid fd"},
{&epfd, EPOLL_CTL_ADD, &unsupported_fd, &events[1], EPERM, "fd does not support epoll"},
{&epfd, EPOLL_CTL_ADD, &inv, &events[1], EBADF, "fd is an invalid fd"},
{&epfd, -1, &fd[1], &events[1], EINVAL, "op is not supported"},
{&epfd, EPOLL_CTL_ADD, &epfd, &events[1], EINVAL, "fd is the same as epfd"},
{&epfd, EPOLL_CTL_ADD, &fd[1], NULL, EFAULT, "events is NULL"},
{&epfd, EPOLL_CTL_DEL, &fd[1], &events[1], ENOENT, "fd is not registered with EPOLL_CTL_DEL"},
{&epfd, EPOLL_CTL_MOD, &fd[1], &events[1], ENOENT, "fd is not registered with EPOLL_CTL_MOD"},
{&epfd, EPOLL_CTL_ADD, &fd[0], &events[0], EEXIST, "fd is already registered with EPOLL_CTL_ADD"}
};
static void setup(void)
{
unsupported_fd = SAFE_OPEN(".", O_RDONLY|O_DIRECTORY, 0);
epfd = epoll_create(2);
if (epfd == -1)
tst_brk(TBROK | TERRNO, "fail to create epoll instance");
SAFE_PIPE(fd);
events[0].data.fd = fd[0];
events[1].data.fd = fd[1];
if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd[0], &events[0]))
tst_brk(TBROK | TERRNO, "epoll_ctl(..., EPOLL_CTL_ADD, ...)");
}
static void cleanup(void)
{
if (epfd)
SAFE_CLOSE(epfd);
if (fd[0])
SAFE_CLOSE(fd[0]);
if (fd[1])
SAFE_CLOSE(fd[1]);
}
static void verify_epoll_ctl(unsigned int n)
{
TST_EXP_FAIL(epoll_ctl(*tc[n].epfd, tc[n].opt, *tc[n].fd, tc[n].event),
tc[n].exp_err, "epoll_ctl(...) if %s", tc[n].desc);
}
static struct tst_test test = {
.tcnt = ARRAY_SIZE(tc),
.setup = setup,
.cleanup = cleanup,
.test = verify_epoll_ctl,
};
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