| 54 | } |
| 55 | |
| 56 | static int use_buf(struct io_uring *ring, void *addr, int index) |
| 57 | { |
| 58 | struct io_uring_sqe *sqe; |
| 59 | struct io_uring_cqe *cqe; |
| 60 | char src_buf[32]; |
| 61 | int fds[2], ret; |
| 62 | |
| 63 | fdinfo_read(ring); |
| 64 | |
| 65 | if (pipe(fds) < 0) |
| 66 | return -errno; |
| 67 | |
| 68 | memset(src_buf, 0xbb, sizeof(src_buf)); |
| 69 | |
| 70 | sqe = io_uring_get_sqe(ring); |
| 71 | io_uring_prep_read_fixed(sqe, fds[0], addr, sizeof(src_buf), 0, index); |
| 72 | io_uring_submit(ring); |
| 73 | |
| 74 | ret = write(fds[1], src_buf, sizeof(src_buf)); |
| 75 | if (ret < 0) |
| 76 | return -errno; |
| 77 | |
| 78 | ret = io_uring_wait_cqe(ring, &cqe); |
| 79 | if (ret) { |
| 80 | fprintf(stderr, "wait_cqe: %d\n", ret); |
| 81 | return ret; |
| 82 | } |
| 83 | |
| 84 | ret = cqe->res; |
| 85 | io_uring_cqe_seen(ring, cqe); |
| 86 | if (ret < 0) |
| 87 | return ret; |
| 88 | close(fds[0]); |
| 89 | close(fds[1]); |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | static int test_offsets(void) |
| 94 | { |