test: test ring exit cancels SQPOLL's iowq
Another SQPOLL cancellation test making sure that io_uring_queue_exit()
does cancel all requests and free the ring, in particular for SQPOLL
requests gone to iowq.
[axboe: silence unchecked read return]
@@ -438,6 +438,48 @@ static int test_cancel_inflight_exit(void)
return 0;
}
+static int test_sqpoll_cancel_iowq_requests(void)
+{
+ struct io_uring ring;
+ struct io_uring_sqe *sqe;
+ int ret, fds[2];
+ char buffer[16];
+
+ ret = io_uring_queue_init(8, &ring, IORING_SETUP_SQPOLL);
+ if (ret) {
+ fprintf(stderr, "ring create failed: %d\n", ret);
+ return 1;
+ }
+ if (pipe(fds)) {
+ perror("pipe");
+ return 1;
+ }
+ /* pin both pipe ends via io-wq */
+ sqe = io_uring_get_sqe(&ring);
+ io_uring_prep_read(sqe, fds[0], buffer, 10, 0);
+ sqe->flags |= IOSQE_ASYNC | IOSQE_IO_LINK;
+ sqe->user_data = 1;
+
+ sqe = io_uring_get_sqe(&ring);
+ io_uring_prep_write(sqe, fds[1], buffer, 10, 0);
+ sqe->flags |= IOSQE_ASYNC;
+ sqe->user_data = 2;
+ ret = io_uring_submit(&ring);
+ if (ret != 2) {
+ fprintf(stderr, "%s: got %d, wanted 1\n", __FUNCTION__, ret);
+ return 1;
+ }
+
+ /* wait for sqpoll to kick in and submit before exit */
+ sleep(1);
+ io_uring_queue_exit(&ring);
+
+ /* close the write end, so if ring is cancelled properly read() fails*/
+ close(fds[1]);
+ ret = read(fds[0], buffer, 10);
+ close(fds[0]);
+ return 0;
+}
int main(int argc, char *argv[])
{
@@ -461,6 +503,11 @@ int main(int argc, char *argv[])
return 1;
}
+ if (test_sqpoll_cancel_iowq_requests()) {
+ fprintf(stderr, "test_sqpoll_cancel_iowq_requests() failed\n");
+ return 1;
+ }
+
t_create_file(".basic-rw", FILE_SIZE);
vecs = t_create_buffers(BUFFERS, BS);
