98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Regression test for incorrect async_list io_should_merge() logic
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* Bug was fixed in 5.5 by (commit: 561fb04 io_uring: replace workqueue usage with io-wq")
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* Affects 5.4 lts branch, at least 5.4.106 is affected.
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "liburing.h"
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#include "helpers.h"
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int main(int argc, char *argv[])
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{
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struct io_uring_sqe *sqe;
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struct io_uring_cqe *cqe;
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struct io_uring ring;
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int ret, fd, pipe1[2];
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char buf[4096];
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struct iovec vec = {
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.iov_base = buf,
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.iov_len = sizeof(buf)
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};
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struct __kernel_timespec ts = {.tv_sec = 3, .tv_nsec = 0};
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if (argc > 1)
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return 0;
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ret = pipe(pipe1);
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assert(!ret);
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fd = open("testfile", O_RDWR | O_CREAT, 0644);
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assert(ret >= 0);
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ret = ftruncate(fd, 4096);
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assert(!ret);
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ret = t_create_ring(4, &ring, 0);
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if (ret == T_SETUP_SKIP)
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return 0;
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else if (ret < 0)
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return 1;
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/* REQ1 */
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sqe = io_uring_get_sqe(&ring);
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io_uring_prep_readv(sqe, pipe1[0], &vec, 1, 0);
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sqe->user_data = 1;
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/* REQ2 */
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sqe = io_uring_get_sqe(&ring);
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io_uring_prep_readv(sqe, fd, &vec, 1, 4096);
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sqe->user_data = 2;
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ret = io_uring_submit(&ring);
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assert(ret == 2);
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ret = io_uring_wait_cqe(&ring, &cqe);
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assert(!ret);
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assert(cqe->res == 0);
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assert(cqe->user_data == 2);
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io_uring_cqe_seen(&ring, cqe);
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/*
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* REQ3
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* Prepare request adjacent to previous one, so merge logic may want to
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* link it to previous request, but because of a bug in merge logic
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* it may be merged with <REQ1> request
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*/
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sqe = io_uring_get_sqe(&ring);
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io_uring_prep_readv(sqe, fd, &vec, 1, 2048);
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sqe->user_data = 3;
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ret = io_uring_submit(&ring);
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assert(ret == 1);
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/*
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* Read may stuck because of bug there request was be incorrecly
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* merged with <REQ1> request
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*/
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ret = io_uring_wait_cqe_timeout(&ring, &cqe, &ts);
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if (ret == -ETIME) {
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printf("TEST_FAIL: readv req3 stuck\n");
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return 1;
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}
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assert(!ret);
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assert(cqe->res == 2048);
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assert(cqe->user_data == 3);
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io_uring_cqe_seen(&ring, cqe);
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io_uring_queue_exit(&ring);
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return 0;
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}
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