summaryrefslogtreecommitdiff
path: root/test/eeed8b54e0df-test.c
blob: b6e27ccdfdda708d174434030d7e7150698818e1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
/* SPDX-License-Identifier: MIT */
/*
 * Description: -EAGAIN handling
 *
 */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>

#include "helpers.h"
#include "liburing.h"

#define BLOCK	4096

#ifndef RWF_NOWAIT
#define RWF_NOWAIT	8
#endif

static int get_file_fd(void)
{
	ssize_t ret;
	char *buf;
	int fd;

	fd = open("testfile", O_RDWR | O_CREAT, 0644);
	if (fd < 0) {
		perror("open file");
		return -1;
	}

	buf = t_malloc(BLOCK);
	ret = write(fd, buf, BLOCK);
	if (ret != BLOCK) {
		if (ret < 0)
			perror("write");
		else
			printf("Short write\n");
		goto err;
	}
	fsync(fd);

	if (posix_fadvise(fd, 0, 4096, POSIX_FADV_DONTNEED)) {
		perror("fadvise");
err:
		close(fd);
		free(buf);
		return -1;
	}

	free(buf);
	return fd;
}

static void put_file_fd(int fd)
{
	close(fd);
	unlink("testfile");
}

int main(int argc, char *argv[])
{
	struct io_uring ring;
	struct io_uring_sqe *sqe;
	struct io_uring_cqe *cqe;
	struct iovec iov;
	int ret, fd;

	if (argc > 1)
		return 0;

	iov.iov_base = t_malloc(4096);
	iov.iov_len = 4096;

	ret = io_uring_queue_init(2, &ring, 0);
	if (ret) {
		printf("ring setup failed\n");
		return 1;

	}

	sqe = io_uring_get_sqe(&ring);
	if (!sqe) {
		printf("get sqe failed\n");
		return 1;
	}

	fd = get_file_fd();
	if (fd < 0)
		return 1;

	io_uring_prep_readv(sqe, fd, &iov, 1, 0);
	sqe->rw_flags = RWF_NOWAIT;

	ret = io_uring_submit(&ring);
	if (ret != 1) {
		printf("Got submit %d, expected 1\n", ret);
		goto err;
	}

	ret = io_uring_peek_cqe(&ring, &cqe);
	if (ret) {
		printf("Ring peek got %d\n", ret);
		goto err;
	}

	if (cqe->res != -EAGAIN && cqe->res != 4096) {
		printf("cqe error: %d\n", cqe->res);
		goto err;
	}

	put_file_fd(fd);
	return 0;
err:
	put_file_fd(fd);
	return 1;
}