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test/tty-write-dpoll.c
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Jens Axboe
test/tty-write-dpoll: add test case for double poll write
23 мар 2022, 04:39
23 мар 2022, 04:39
0faab9e
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/* SPDX-License-Identifier: MIT */ /* * Test double poll tty write. A test case for the regression fixed by: * * commit 6e295a664efd083ac9a5c1a8130c45be1db0cde7 * Author: Jens Axboe <axboe@kernel.dk> * Date: Tue Mar 22 13:11:28 2022 -0600 * * io_uring: fix assuming triggered poll waitqueue is the single poll * */ #include <errno.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include <fcntl.h> #include "liburing.h" #include "helpers.h" #define SQES 128 #define BUFSIZE 512 int main(int argc, char *argv[]) { static char buf[BUFSIZE]; struct iovec vecs[SQES]; struct io_uring ring; int ret, i, fd; if (argc > 1) return 0; fd = open("/dev/ttyS0", O_RDWR | O_NONBLOCK); if (fd < 0) return 0; ret = t_create_ring(SQES, &ring, 0); if (ret == T_SETUP_SKIP) return 0; else if (ret < 0) return 1; for (i = 0; i < SQES; i++) { struct io_uring_sqe *sqe; sqe = io_uring_get_sqe(&ring); vecs[i].iov_base = buf; vecs[i].iov_len = sizeof(buf); io_uring_prep_writev(sqe, fd, &vecs[i], 1, 0); } ret = io_uring_submit(&ring); if (ret != SQES) { fprintf(stderr, "submit: %d\n", ret); return 1; } return 0; }