Jens Axboe | e502435 | 2020-02-11 20:34:12 -0700 | [diff] [blame] | 1 | /* SPDX-License-Identifier: MIT */ |
Jens Axboe | d6440b0 | 2019-12-22 20:29:04 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Description: test io_uring poll handling |
| 4 | * |
| 5 | */ |
| 6 | #include <errno.h> |
| 7 | #include <stdio.h> |
| 8 | #include <unistd.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <string.h> |
| 11 | #include <signal.h> |
| 12 | #include <fcntl.h> |
| 13 | #include <sys/poll.h> |
| 14 | #include <sys/wait.h> |
| 15 | #include <sys/select.h> |
| 16 | #include <pthread.h> |
| 17 | #include <sys/epoll.h> |
| 18 | |
| 19 | #include "liburing.h" |
| 20 | |
| 21 | struct thread_data { |
| 22 | struct io_uring *ring; |
| 23 | int fd; |
| 24 | int events; |
| 25 | const char *test; |
| 26 | int out[2]; |
| 27 | }; |
| 28 | |
| 29 | static void *epoll_wait_fn(void *data) |
| 30 | { |
| 31 | struct thread_data *td = data; |
| 32 | struct epoll_event ev; |
| 33 | |
| 34 | if (epoll_wait(td->fd, &ev, 1, -1) < 0) { |
| 35 | perror("epoll_wait"); |
| 36 | goto err; |
| 37 | } |
| 38 | |
| 39 | return NULL; |
| 40 | err: |
| 41 | return (void *) 1; |
| 42 | } |
| 43 | |
| 44 | static void *iou_poll(void *data) |
| 45 | { |
| 46 | struct thread_data *td = data; |
| 47 | struct io_uring_sqe *sqe; |
| 48 | struct io_uring_cqe *cqe; |
| 49 | int ret; |
| 50 | |
| 51 | sqe = io_uring_get_sqe(td->ring); |
| 52 | io_uring_prep_poll_add(sqe, td->fd, td->events); |
| 53 | |
| 54 | ret = io_uring_submit(td->ring); |
| 55 | if (ret != 1) { |
| 56 | fprintf(stderr, "submit got %d\n", ret); |
| 57 | goto err; |
| 58 | } |
| 59 | |
| 60 | ret = io_uring_wait_cqe(td->ring, &cqe); |
| 61 | if (ret) { |
| 62 | fprintf(stderr, "wait_cqe: %d\n", ret); |
| 63 | goto err; |
| 64 | } |
| 65 | |
| 66 | td->out[0] = cqe->res & 0x3f; |
| 67 | io_uring_cqe_seen(td->ring, cqe); |
| 68 | return NULL; |
| 69 | err: |
| 70 | return (void *) 1; |
| 71 | } |
| 72 | |
| 73 | static void *poll_pipe(void *data) |
| 74 | { |
| 75 | struct thread_data *td = data; |
| 76 | struct pollfd pfd; |
| 77 | int ret; |
| 78 | |
| 79 | pfd.fd = td->fd; |
| 80 | pfd.events = td->events; |
| 81 | |
| 82 | ret = poll(&pfd, 1, -1); |
| 83 | if (ret < 0) |
| 84 | perror("poll"); |
| 85 | |
| 86 | td->out[1] = pfd.revents; |
| 87 | return NULL; |
| 88 | } |
| 89 | |
| 90 | static int do_pipe_pollin_test(struct io_uring *ring) |
| 91 | { |
| 92 | struct thread_data td; |
| 93 | pthread_t threads[2]; |
| 94 | int ret, pipe1[2]; |
| 95 | char buf; |
| 96 | |
| 97 | if (pipe(pipe1) < 0) { |
| 98 | perror("pipe"); |
| 99 | return 1; |
| 100 | } |
| 101 | |
| 102 | td.ring = ring; |
| 103 | td.fd = pipe1[0]; |
| 104 | td.events = POLLIN; |
| 105 | td.test = __FUNCTION__; |
| 106 | |
| 107 | pthread_create(&threads[1], NULL, iou_poll, &td); |
| 108 | pthread_create(&threads[0], NULL, poll_pipe, &td); |
| 109 | usleep(100000); |
| 110 | |
| 111 | buf = 0x89; |
| 112 | ret = write(pipe1[1], &buf, sizeof(buf)); |
| 113 | if (ret != sizeof(buf)) { |
| 114 | fprintf(stderr, "write failed: %d\n", ret); |
| 115 | return 1; |
| 116 | } |
| 117 | |
| 118 | pthread_join(threads[0], NULL); |
| 119 | pthread_join(threads[1], NULL); |
| 120 | |
| 121 | if (td.out[0] != td.out[1]) { |
| 122 | fprintf(stderr, "%s: res %x/%x differ\n", __FUNCTION__, |
| 123 | td.out[0], td.out[1]); |
| 124 | return 1; |
| 125 | } |
| 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | static int do_pipe_pollout_test(struct io_uring *ring) |
| 130 | { |
| 131 | struct thread_data td; |
| 132 | pthread_t threads[2]; |
| 133 | int ret, pipe1[2]; |
| 134 | char buf; |
| 135 | |
| 136 | if (pipe(pipe1) < 0) { |
| 137 | perror("pipe"); |
| 138 | return 1; |
| 139 | } |
| 140 | |
| 141 | td.ring = ring; |
| 142 | td.fd = pipe1[1]; |
| 143 | td.events = POLLOUT; |
| 144 | td.test = __FUNCTION__; |
| 145 | |
| 146 | pthread_create(&threads[0], NULL, poll_pipe, &td); |
| 147 | pthread_create(&threads[1], NULL, iou_poll, &td); |
| 148 | usleep(100000); |
| 149 | |
| 150 | buf = 0x89; |
| 151 | ret = write(pipe1[1], &buf, sizeof(buf)); |
| 152 | if (ret != sizeof(buf)) { |
| 153 | fprintf(stderr, "write failed: %d\n", ret); |
| 154 | return 1; |
| 155 | } |
| 156 | |
| 157 | pthread_join(threads[0], NULL); |
| 158 | pthread_join(threads[1], NULL); |
| 159 | |
| 160 | if (td.out[0] != td.out[1]) { |
| 161 | fprintf(stderr, "%s: res %x/%x differ\n", __FUNCTION__, |
| 162 | td.out[0], td.out[1]); |
| 163 | return 1; |
| 164 | } |
| 165 | |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | static int do_fd_test(struct io_uring *ring, const char *fname, int events) |
| 170 | { |
| 171 | struct thread_data td; |
| 172 | pthread_t threads[2]; |
| 173 | int fd; |
| 174 | |
| 175 | fd = open(fname, O_RDONLY); |
| 176 | if (fd < 0) { |
| 177 | perror("open"); |
| 178 | return 1; |
| 179 | } |
| 180 | |
| 181 | td.ring = ring; |
| 182 | td.fd = fd; |
| 183 | td.events = events; |
| 184 | td.test = __FUNCTION__; |
| 185 | |
| 186 | pthread_create(&threads[0], NULL, poll_pipe, &td); |
| 187 | pthread_create(&threads[1], NULL, iou_poll, &td); |
| 188 | |
| 189 | pthread_join(threads[0], NULL); |
| 190 | pthread_join(threads[1], NULL); |
| 191 | |
| 192 | if (td.out[0] != td.out[1]) { |
| 193 | fprintf(stderr, "%s: res %x/%x differ\n", __FUNCTION__, |
| 194 | td.out[0], td.out[1]); |
| 195 | return 1; |
| 196 | } |
| 197 | |
| 198 | return 0; |
| 199 | } |
| 200 | |
Jens Axboe | ad42876 | 2020-02-06 09:56:59 -0700 | [diff] [blame] | 201 | static int iou_epoll_ctl(struct io_uring *ring, int epfd, int fd, |
| 202 | struct epoll_event *ev) |
| 203 | { |
| 204 | struct io_uring_sqe *sqe; |
| 205 | struct io_uring_cqe *cqe; |
| 206 | int ret; |
| 207 | |
| 208 | sqe = io_uring_get_sqe(ring); |
| 209 | if (!sqe) { |
| 210 | fprintf(stderr, "Failed to get sqe\n"); |
| 211 | return 1; |
| 212 | } |
| 213 | |
| 214 | io_uring_prep_epoll_ctl(sqe, epfd, fd, EPOLL_CTL_ADD, ev); |
| 215 | |
| 216 | ret = io_uring_submit(ring); |
| 217 | if (ret != 1) { |
| 218 | fprintf(stderr, "submit: %d\n", ret); |
| 219 | return 1; |
| 220 | } |
| 221 | |
| 222 | ret = io_uring_wait_cqe(ring, &cqe); |
| 223 | if (ret) { |
| 224 | fprintf(stderr, "wait_cqe: %d\n", ret); |
| 225 | return 1; |
| 226 | } |
| 227 | |
| 228 | ret = cqe->res; |
| 229 | io_uring_cqe_seen(ring, cqe); |
| 230 | return ret; |
| 231 | } |
| 232 | |
| 233 | static int do_test_epoll(struct io_uring *ring, int iou_epoll_add) |
Jens Axboe | d6440b0 | 2019-12-22 20:29:04 -0700 | [diff] [blame] | 234 | { |
| 235 | struct epoll_event ev; |
| 236 | struct thread_data td; |
| 237 | pthread_t threads[2]; |
| 238 | int ret, pipe1[2]; |
| 239 | char buf; |
| 240 | int fd; |
| 241 | |
| 242 | fd = epoll_create1(0); |
| 243 | if (fd < 0) { |
| 244 | perror("epoll_create"); |
| 245 | return 1; |
| 246 | } |
| 247 | |
| 248 | if (pipe(pipe1) < 0) { |
| 249 | perror("pipe"); |
| 250 | return 1; |
| 251 | } |
| 252 | |
| 253 | ev.events = EPOLLIN; |
| 254 | ev.data.fd = pipe1[0]; |
| 255 | |
Jens Axboe | ad42876 | 2020-02-06 09:56:59 -0700 | [diff] [blame] | 256 | if (!iou_epoll_add) { |
| 257 | if (epoll_ctl(fd, EPOLL_CTL_ADD, pipe1[0], &ev) < 0) { |
| 258 | perror("epoll_ctrl"); |
| 259 | return 1; |
| 260 | } |
| 261 | } else { |
Guillem Jover | 1fb4160 | 2020-02-11 00:45:47 +0100 | [diff] [blame] | 262 | ret = iou_epoll_ctl(ring, fd, pipe1[0], &ev); |
| 263 | if (ret == -EINVAL) { |
| 264 | fprintf(stdout, "epoll not supported, skipping\n"); |
| 265 | return 0; |
| 266 | } else if (ret < 0) { |
Jens Axboe | ad42876 | 2020-02-06 09:56:59 -0700 | [diff] [blame] | 267 | return 1; |
Guillem Jover | 1fb4160 | 2020-02-11 00:45:47 +0100 | [diff] [blame] | 268 | } |
Jens Axboe | d6440b0 | 2019-12-22 20:29:04 -0700 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | td.ring = ring; |
| 272 | td.fd = fd; |
| 273 | td.events = POLLIN; |
| 274 | td.test = __FUNCTION__; |
| 275 | |
| 276 | pthread_create(&threads[0], NULL, iou_poll, &td); |
| 277 | pthread_create(&threads[1], NULL, epoll_wait_fn, &td); |
| 278 | usleep(100000); |
| 279 | |
| 280 | buf = 0x89; |
| 281 | ret = write(pipe1[1], &buf, sizeof(buf)); |
| 282 | if (ret != sizeof(buf)) { |
| 283 | fprintf(stderr, "write failed: %d\n", ret); |
| 284 | return 1; |
| 285 | } |
| 286 | |
| 287 | pthread_join(threads[0], NULL); |
| 288 | pthread_join(threads[1], NULL); |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | int main(int argc, char *argv[]) |
| 293 | { |
| 294 | struct io_uring ring; |
| 295 | const char *fname; |
| 296 | int ret; |
| 297 | |
| 298 | ret = io_uring_queue_init(1, &ring, 0); |
| 299 | if (ret) { |
| 300 | fprintf(stderr, "ring setup failed\n"); |
| 301 | return 1; |
| 302 | } |
| 303 | |
| 304 | ret = do_pipe_pollin_test(&ring); |
| 305 | if (ret) { |
| 306 | fprintf(stderr, "pipe pollin test failed\n"); |
| 307 | return ret; |
| 308 | } |
| 309 | |
| 310 | ret = do_pipe_pollout_test(&ring); |
| 311 | if (ret) { |
| 312 | fprintf(stderr, "pipe pollout test failed\n"); |
| 313 | return ret; |
| 314 | } |
| 315 | |
Jens Axboe | ad42876 | 2020-02-06 09:56:59 -0700 | [diff] [blame] | 316 | ret = do_test_epoll(&ring, 0); |
Jens Axboe | d6440b0 | 2019-12-22 20:29:04 -0700 | [diff] [blame] | 317 | if (ret) { |
Jens Axboe | ad42876 | 2020-02-06 09:56:59 -0700 | [diff] [blame] | 318 | fprintf(stderr, "epoll test 0 failed\n"); |
| 319 | return ret; |
| 320 | } |
| 321 | |
| 322 | ret = do_test_epoll(&ring, 1); |
| 323 | if (ret) { |
| 324 | fprintf(stderr, "epoll test 1 failed\n"); |
Jens Axboe | d6440b0 | 2019-12-22 20:29:04 -0700 | [diff] [blame] | 325 | return ret; |
| 326 | } |
| 327 | |
| 328 | if (argc > 1) |
| 329 | fname = argv[1]; |
| 330 | else |
| 331 | fname = argv[0]; |
| 332 | |
| 333 | ret = do_fd_test(&ring, fname, POLLIN); |
| 334 | if (ret) { |
| 335 | fprintf(stderr, "fd test IN failed\n"); |
| 336 | return ret; |
| 337 | } |
| 338 | |
| 339 | ret = do_fd_test(&ring, fname, POLLOUT); |
| 340 | if (ret) { |
| 341 | fprintf(stderr, "fd test OUT failed\n"); |
| 342 | return ret; |
| 343 | } |
| 344 | |
| 345 | ret = do_fd_test(&ring, fname, POLLOUT | POLLIN); |
| 346 | if (ret) { |
| 347 | fprintf(stderr, "fd test IN|OUT failed\n"); |
| 348 | return ret; |
| 349 | } |
| 350 | |
| 351 | return 0; |
| 352 | |
| 353 | } |