1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or https://opensource.org/licenses/CDDL-1.0.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2018 Canonical. All rights reserved.
24 */
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <unistd.h>
29 #include <fcntl.h>
30 #include <sys/mman.h>
31 #include <sys/types.h>
32 #include <sys/stat.h>
33 #include <libaio.h>
34 #include <err.h>
35
36 static io_context_t io_ctx;
37
38 static void
do_sync_io(struct iocb * iocb)39 do_sync_io(struct iocb *iocb)
40 {
41 struct io_event event;
42 struct iocb *iocbs[] = { iocb };
43 struct timespec ts = { 30, 0 };
44
45 if (io_submit(io_ctx, 1, iocbs) != 1)
46 err(1, "io_submit failed");
47
48 if (io_getevents(io_ctx, 0, 1, &event, &ts) != 1)
49 err(1, "io_getevents failed");
50 }
51
52 int
main(int argc,char ** argv)53 main(int argc, char **argv)
54 {
55 (void) argc;
56 char *buf;
57 int page_size = getpagesize();
58 int buf_size = strtol(argv[2], NULL, 0);
59 int rwfd;
60 struct iocb iocb;
61
62 if (io_queue_init(1024, &io_ctx))
63 err(1, "io_queue_init failed");
64
65 rwfd = open(argv[1], O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
66 if (rwfd < 0)
67 err(1, "open failed");
68
69 if (ftruncate(rwfd, buf_size) < 0)
70 err(1, "ftruncate failed");
71
72 buf = mmap(0, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, rwfd, 0);
73 if (buf == MAP_FAILED)
74 err(1, "mmap failed");
75
76 (void) io_prep_pwrite(&iocb, rwfd, buf, buf_size, 0);
77 do_sync_io(&iocb);
78
79 (void) io_prep_pread(&iocb, rwfd, buf, buf_size, 0);
80 do_sync_io(&iocb);
81
82 if (close(rwfd))
83 err(1, "close failed");
84
85 if (io_queue_release(io_ctx) != 0)
86 err(1, "io_queue_release failed");
87
88 return (0);
89 }
90