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
|
#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/types.h>
#include "helpers.h"
#include "liburing.h"
#define IOVECS_LEN 2
int main(int argc, char *argv[])
{
struct iovec iovecs[IOVECS_LEN];
struct io_uring ring;
int i, fd, ret;
if (argc > 1)
return T_EXIT_SKIP;
fd = open("/dev/zero", O_RDONLY);
if (fd < 0) {
fprintf(stderr, "Failed to open /dev/zero\n");
return T_EXIT_FAIL;
}
if (io_uring_queue_init(32, &ring, 0) < 0) {
fprintf(stderr, "Failed to init io_uring\n");
close(fd);
return T_EXIT_FAIL;
}
for (i = 0; i < IOVECS_LEN; ++i) {
iovecs[i].iov_base = t_malloc(64);
iovecs[i].iov_len = 64;
}
ret = io_uring_register_buffers(&ring, iovecs, IOVECS_LEN);
if (ret) {
fprintf(stderr, "Failed to register buffers\n");
return T_EXIT_FAIL;
}
for (i = 0; i < IOVECS_LEN; ++i) {
struct io_uring_sqe *sqe = io_uring_get_sqe(&ring);
const char *str = "#include <errno.h>";
iovecs[i].iov_len = strlen(str);
io_uring_prep_read_fixed(sqe, fd, iovecs[i].iov_base, strlen(str), 0, i);
if (i == 0)
io_uring_sqe_set_flags(sqe, IOSQE_IO_LINK);
io_uring_sqe_set_data(sqe, (void *)str);
}
ret = io_uring_submit_and_wait(&ring, IOVECS_LEN);
if (ret < 0) {
fprintf(stderr, "Failed to submit IO\n");
return T_EXIT_FAIL;
} else if (ret < 2) {
fprintf(stderr, "Submitted %d, wanted %d\n", ret, IOVECS_LEN);
return T_EXIT_FAIL;
}
for (i = 0; i < IOVECS_LEN; i++) {
struct io_uring_cqe *cqe;
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait_cqe=%d\n", ret);
return T_EXIT_FAIL;
}
if (cqe->res != iovecs[i].iov_len) {
fprintf(stderr, "read: wanted %ld, got %d\n",
(long) iovecs[i].iov_len, cqe->res);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(&ring, cqe);
}
close(fd);
io_uring_queue_exit(&ring);
for (i = 0; i < IOVECS_LEN; ++i)
free(iovecs[i].iov_base);
return T_EXIT_PASS;
}
|
