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/* SPDX-License-Identifier: MIT */
/*
* Description: test SQPOLL with IORING_SETUP_ATTACH_WQ and closing of
* the original ring descriptor.
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/poll.h>
#include <sys/eventfd.h>
#include <sys/resource.h>
#include "helpers.h"
#include "liburing.h"
#define FILE_SIZE (128 * 1024 * 1024)
#define BS 4096
#define BUFFERS 64
#define NR_RINGS 4
static struct iovec *vecs;
static struct io_uring rings[NR_RINGS];
static int wait_io(struct io_uring *ring, int nr_ios)
{
struct io_uring_cqe *cqe;
while (nr_ios) {
io_uring_wait_cqe(ring, &cqe);
if (cqe->res != BS) {
fprintf(stderr, "Unexpected ret %d\n", cqe->res);
return 1;
}
io_uring_cqe_seen(ring, cqe);
nr_ios--;
}
return 0;
}
static int queue_io(struct io_uring *ring, int fd, int nr_ios)
{
unsigned long off;
int i;
i = 0;
off = 0;
while (nr_ios) {
struct io_uring_sqe *sqe;
sqe = io_uring_get_sqe(ring);
if (!sqe)
break;
io_uring_prep_read(sqe, fd, vecs[i].iov_base, vecs[i].iov_len, off);
nr_ios--;
i++;
off += BS;
}
io_uring_submit(ring);
return i;
}
static int do_io(int fd, int ring_start, int ring_end)
{
int i, rets[NR_RINGS];
unsigned ios = 0;
while (ios < 32) {
for (i = ring_start; i < ring_end; i++) {
int ret = queue_io(&rings[i], fd, BUFFERS);
if (ret < 0)
goto err;
rets[i] = ret;
}
for (i = ring_start; i < ring_end; i++) {
if (wait_io(&rings[i], rets[i]))
goto err;
}
ios += BUFFERS;
}
return 0;
err:
return 1;
}
static int test(int fd, int do_dup_and_close, int close_ring)
{
int i, ret, ring_fd;
for (i = 0; i < NR_RINGS; i++) {
struct io_uring_params p = { };
p.flags = IORING_SETUP_SQPOLL;
p.sq_thread_idle = 100;
if (i) {
p.wq_fd = rings[0].ring_fd;
p.flags |= IORING_SETUP_ATTACH_WQ;
}
ret = io_uring_queue_init_params(BUFFERS, &rings[i], &p);
if (ret) {
fprintf(stderr, "queue_init: %d/%d\n", ret, i);
goto err;
}
/* no sharing for non-fixed either */
if (!(p.features & IORING_FEAT_SQPOLL_NONFIXED)) {
fprintf(stdout, "No SQPOLL sharing, skipping\n");
return 0;
}
}
/* test all rings */
if (do_io(fd, 0, NR_RINGS))
goto err;
/* dup and close original ring fd */
ring_fd = dup(rings[0].ring_fd);
if (close_ring)
close(rings[0].ring_fd);
rings[0].ring_fd = ring_fd;
if (do_dup_and_close)
goto done;
/* test all but closed one */
if (do_io(fd, 1, NR_RINGS))
goto err;
/* test closed one */
if (do_io(fd, 0, 1))
goto err;
/* make sure thread is idle so we enter the kernel */
usleep(200000);
/* test closed one */
if (do_io(fd, 0, 1))
goto err;
done:
for (i = 0; i < NR_RINGS; i++)
io_uring_queue_exit(&rings[i]);
return 0;
err:
return 1;
}
int main(int argc, char *argv[])
{
char *fname;
int ret, fd;
if (argc > 1) {
fname = argv[1];
} else {
fname = ".basic-rw";
t_create_file(fname, FILE_SIZE);
}
vecs = t_create_buffers(BUFFERS, BS);
fd = open(fname, O_RDONLY | O_DIRECT);
if (fd < 0) {
perror("open");
return -1;
}
ret = test(fd, 0, 0);
if (ret) {
fprintf(stderr, "test 0 0 failed\n");
goto err;
}
ret = test(fd, 0, 1);
if (ret) {
fprintf(stderr, "test 0 1 failed\n");
goto err;
}
ret = test(fd, 1, 0);
if (ret) {
fprintf(stderr, "test 1 0 failed\n");
goto err;
}
if (fname != argv[1])
unlink(fname);
return 0;
err:
if (fname != argv[1])
unlink(fname);
return 1;
}
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