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/* SPDX-License-Identifier: MIT */
/*
* Test io_uring_register with a registered ring (IORING_REGISTER_USE_REGISTERED_RING)
*
*/
#include <stdio.h>
#include "helpers.h"
int main(int argc, char *argv[])
{
struct io_uring ring;
unsigned values[2];
int ret;
if (argc > 1)
return T_EXIT_SKIP;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return T_EXIT_FAIL;
}
if (!(ring.features & IORING_FEAT_REG_REG_RING)) {
fprintf(stderr, "IORING_FEAT_REG_REG_RING not available in kernel\n");
io_uring_queue_exit(&ring);
return T_EXIT_SKIP;
}
ret = io_uring_close_ring_fd(&ring);
if (ret != -EINVAL) {
fprintf(stderr, "closing ring fd should EINVAL before register\n");
goto err;
}
ret = io_uring_unregister_ring_fd(&ring);
if (ret != -EINVAL) {
fprintf(stderr, "unregistering not-registered ring fd should fail\n");
goto err;
}
ret = io_uring_register_ring_fd(&ring);
if (ret != 1) {
fprintf(stderr, "registering ring fd failed\n");
goto err;
}
ret = io_uring_register_ring_fd(&ring);
if (ret != -EEXIST) {
fprintf(stderr, "registering already-registered ring fd should fail\n");
goto err;
}
/* Test a simple io_uring_register operation expected to work.
* io_uring_register_iowq_max_workers is arbitrary.
*/
values[0] = values[1] = 0;
ret = io_uring_register_iowq_max_workers(&ring, values);
if (ret || (values[0] == 0 && values[1] == 0)) {
fprintf(stderr, "io_uring_register operation failed before closing ring fd\n");
goto err;
}
ret = io_uring_close_ring_fd(&ring);
if (ret != 1) {
fprintf(stderr, "closing ring fd failed\n");
goto err;
}
values[0] = values[1] = 0;
ret = io_uring_register_iowq_max_workers(&ring, values);
if (ret || (values[0] == 0 && values[1] == 0)) {
fprintf(stderr, "io_uring_register operation failed after closing ring fd\n");
goto err;
}
ret = io_uring_close_ring_fd(&ring);
if (ret != -EBADF) {
fprintf(stderr, "closing already-closed ring fd should fail\n");
goto err;
}
io_uring_queue_exit(&ring);
return T_EXIT_PASS;
err:
io_uring_queue_exit(&ring);
return T_EXIT_FAIL;
}
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