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// SPDX-License-Identifier: MIT
/*
* Description: test pipe creation through io_uring
*
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "helpers.h"
#include "liburing.h"
static int no_pipe;
struct params {
int fixed;
int async;
int too_small;
};
static int pipe_comms(struct io_uring *ring, int *fds, struct params *p)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
char src[32], dst[32];
int i, ret;
memset(src, 0x5a, sizeof(src));
memset(dst, 0, sizeof(dst));
sqe = io_uring_get_sqe(ring);
io_uring_prep_write(sqe, fds[1], src, sizeof(src), 0);
if (p->fixed)
sqe->flags |= IOSQE_FIXED_FILE;
sqe->user_data = 1;
io_uring_submit(ring);
sqe = io_uring_get_sqe(ring);
io_uring_prep_read(sqe, fds[0], dst, sizeof(dst), 0);
if (p->fixed)
sqe->flags |= IOSQE_FIXED_FILE;
sqe->user_data = 2;
io_uring_submit(ring);
for (i = 0; i < 2; i++) {
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "wait cqe %d\n", ret);
return 1;
}
if (cqe->res != 32) {
printf("ud=%d, res=%d\n", (int) cqe->user_data, cqe->res);
return 1;
}
io_uring_cqe_seen(ring, cqe);
}
return memcmp(dst, src, sizeof(src));
}
static int pipe_test(int init_flags, struct params *p)
{
struct io_uring ring;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int ret, fds[2];
ret = io_uring_queue_init(8, &ring, init_flags);
/* can hit -ENOMEM due to repeated ring creation and teardowns */
if (ret == -ENOMEM) {
usleep(1000);
return 0;
} else if (ret) {
fprintf(stderr, "ring_init: %d\n", ret);
return 1;
}
if (p->fixed) {
int sz;
if (p->too_small)
sz = 1;
else
sz = 100;
ret = io_uring_register_files_sparse(&ring, sz);
if (ret) {
if (ret == -EINVAL) {
no_pipe = 1;
return 0;
}
fprintf(stderr, "Failed to register sparse table %d\n", ret);
return 1;
}
}
fds[0] = fds[1] = -1;
sqe = io_uring_get_sqe(&ring);
if (!p->fixed)
io_uring_prep_pipe(sqe, fds, 0);
else
io_uring_prep_pipe_direct(sqe, fds, 0, IORING_FILE_INDEX_ALLOC);
if (p->async)
sqe->flags |= IOSQE_ASYNC;
io_uring_submit(&ring);
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait: %d\n", ret);
return 1;
}
if (cqe->res) {
if (cqe->res == -EINVAL) {
no_pipe = 1;
return 0;
}
if (p->fixed && p->too_small && cqe->res == -ENFILE)
goto done;
fprintf(stderr, "Bad cqe res %d\n", cqe->res);
return 1;
}
io_uring_cqe_seen(&ring, cqe);
ret = pipe_comms(&ring, fds, p);
if (!p->fixed) {
close(fds[0]);
close(fds[1]);
}
done:
io_uring_queue_exit(&ring);
return ret;
}
int main(int argc, char *argv[])
{
int init_flags[] = { 0, IORING_SETUP_SQPOLL, IORING_SETUP_DEFER_TASKRUN | IORING_SETUP_SINGLE_ISSUER };
struct params ps[] = {
{ 0, 0, 0 },
{ 0, 1, 0 },
{ 1, 0, 0 },
{ 1, 1, 0 },
{ 0, 0, 1 },
{ 0, 1, 1 },
{ 1, 0, 1 },
{ 1, 1, 1 } };
int i, j;
if (argc > 1)
return T_EXIT_SKIP;
for (i = 0; i < ARRAY_SIZE(init_flags); i++) {
for (j = 0; j < ARRAY_SIZE(ps); j++) {
if (pipe_test(init_flags[i], &ps[j])) {
fprintf(stderr, "pipe %x %d/%d/%d failed\n",
init_flags[i], ps[j].fixed, ps[j].async,
ps[j].too_small);
return T_EXIT_FAIL;
}
if (no_pipe)
return T_EXIT_SKIP;
}
}
return T_EXIT_PASS;
}
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