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/*
* Description: test io_uring poll handling
*
* Based on 22.t from libaio
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include "../src/liburing.h"
int main(int argc, char *argv[])
{
pid_t parent = getpid(), p;
int pipe1[2], pipe2[2];
struct io_uring cring, pring;
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
int ret;
if (pipe(pipe1) != 0 || pipe(pipe2) != 0) {
printf("pipe failed\n");
return 1;
}
p = fork();
switch (p) {
case -1:
printf("fork failed\n");
exit(2);
case 0:
close(pipe1[1]);
close(pipe2[0]);
ret = io_uring_queue_init(1, &cring, 0);
if (ret) {
printf("child: ring setup failed\n");
return 1;
}
sqe = io_uring_get_sqe(&cring);
if (!sqe) {
printf("child: get sqe failed\n");
return 1;
}
memset(sqe, 0, sizeof(*sqe));
sqe->opcode = IORING_OP_POLL;
sqe->fd = pipe1[0];
sqe->poll_events = POLLIN;
sqe->user_data = (unsigned long) &sqe;
ret = io_uring_submit(&cring);
if (ret <= 0) {
printf("child: sqe submit failed\n");
return 1;
}
do {
if (getppid() != parent) {
printf("parent died\n");
exit(2);
}
ret = io_uring_wait_completion(&cring, &cqe);
} while (ret != 0);
if (ret < 0) {
printf("child: completion get failed\n");
return 1;
}
do {
errno = 0;
ret = write(pipe2[1], "foo", 3);
} while (ret == -1 && errno == EINTR);
exit(0);
default:
close(pipe1[0]);
close(pipe2[1]);
ret = io_uring_queue_init(1, &pring, 0);
if (ret) {
printf("parent: ring setup failed\n");
return 1;
}
sqe = io_uring_get_sqe(&pring);
if (!sqe) {
printf("parent: get sqe failed\n");
return 1;
}
memset(sqe, 0, sizeof(*sqe));
sqe->opcode = IORING_OP_POLL;
sqe->fd = pipe2[0];
sqe->poll_events = POLLIN;
sqe->user_data = (unsigned long) &sqe;
ret = io_uring_submit(&pring);
if (ret <= 0) {
printf("parent: sqe submit failed\n");
return 1;
}
kill(p, SIGUSR1);
ret = io_uring_wait_completion(&pring, &cqe);
if (ret < 0) {
printf("parent: cqe get failed\n");
return 1;
}
if (cqe->user_data != (unsigned long) &sqe) {
printf("parent: cqe wrong fd\n");
return 1;
}
if ((cqe->res & POLLIN) != POLLIN) {
printf("parent: cqe did not report readable fd\n");
return 1;
}
return 0;
}
}
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