#include "../config-host.h" /* SPDX-License-Identifier: MIT */ /* * Test io_uring_register with a registered ring (IORING_REGISTER_USE_REGISTERED_RING) * */ #include #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; }