/* SPDX-License-Identifier: MIT */

/*

 * Description: test io_uring poll cancel handling

 *

 */

#include <errno.h>

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <string.h>

#include <inttypes.h>

#include <sys/poll.h>

#include <sys/wait.h>

#include <sys/signal.h>

#include "liburing.h"

struct poll_data {

	unsigned is_poll;

	unsigned is_cancel;

};

static void sig_alrm(int sig)

{

	fprintf(stderr, "Timed out!\n");

	exit(1);

}

int main(int argc, char *argv[])

{

	struct io_uring ring;

	int pipe1[2];

	struct io_uring_cqe *cqe;

	struct io_uring_sqe *sqe;

	struct poll_data *pd, pds[2];

	struct sigaction act;

	int ret;

	if (argc > 1)

		return 0;

	if (pipe(pipe1) != 0) {

		perror("pipe");

		return 1;

	}

	ret = io_uring_queue_init(2, &ring, 0);

	if (ret) {

		fprintf(stderr, "ring setup failed: %d\n", ret);

		return 1;

	}

	memset(&act, 0, sizeof(act));

	act.sa_handler = sig_alrm;

	act.sa_flags = SA_RESTART;

	sigaction(SIGALRM, &act, NULL);

	alarm(1);

	sqe = io_uring_get_sqe(&ring);

	if (!sqe) {

		fprintf(stderr, "get sqe failed\n");

		return 1;

	}

	io_uring_prep_poll_add(sqe, pipe1[0], POLLIN);

	pds[0].is_poll = 1;

	pds[0].is_cancel = 0;

	io_uring_sqe_set_data(sqe, &pds[0]);

	ret = io_uring_submit(&ring);

	if (ret <= 0) {

		fprintf(stderr, "sqe submit failed\n");

		return 1;

	}

	sqe = io_uring_get_sqe(&ring);

	if (!sqe) {

		fprintf(stderr, "get sqe failed\n");

		return 1;

	}

	pds[1].is_poll = 0;

	pds[1].is_cancel = 1;

	io_uring_prep_poll_remove(sqe, &pds[0]);

	io_uring_sqe_set_data(sqe, &pds[1]);

	ret = io_uring_submit(&ring);

	if (ret <= 0) {

		fprintf(stderr, "sqe submit failed: %d\n", ret);

		return 1;

	}

	ret = io_uring_wait_cqe(&ring, &cqe);

	if (ret < 0) {

		fprintf(stderr, "wait cqe failed: %d\n", ret);

		return 1;

	}

	pd = io_uring_cqe_get_data(cqe);

	if (pd->is_poll && cqe->res != -ECANCELED) {

		fprintf(stderr ,"sqe (add=%d/remove=%d) failed with %ld\n",

					pd->is_poll, pd->is_cancel,

					(long) cqe->res);

		return 1;

	} else if (pd->is_cancel && cqe->res) {

		fprintf(stderr, "sqe (add=%d/remove=%d) failed with %ld\n",

					pd->is_poll, pd->is_cancel,

					(long) cqe->res);

		return 1;

	}

	io_uring_cqe_seen(&ring, cqe);

	ret = io_uring_wait_cqe(&ring, &cqe);

	if (ret < 0) {

		fprintf(stderr, "wait_cqe: %d\n", ret);

		return 1;

	}

	pd = io_uring_cqe_get_data(cqe);

	if (pd->is_poll && cqe->res != -ECANCELED) {

		fprintf(stderr, "sqe (add=%d/remove=%d) failed with %ld\n",

					pd->is_poll, pd->is_cancel,

					(long) cqe->res);

		return 1;

	} else if (pd->is_cancel && cqe->res) {

		fprintf(stderr, "sqe (add=%d/remove=%d) failed with %ld\n",

					pd->is_poll, pd->is_cancel,

					(long) cqe->res);

		return 1;

	}

	io_uring_cqe_seen(&ring, cqe);

	return 0;

}