1 /* $NetBSD: rumpfiber_bio.c,v 1.5 2014/11/04 19:05:17 pooka Exp $ */
2
3 /*-
4 * Copyright (c) 2014 Antti Kantee. All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include "rumpuser_port.h"
29
30 #if !defined(lint)
31 __RCSID("$NetBSD: rumpfiber_bio.c,v 1.5 2014/11/04 19:05:17 pooka Exp $");
32 #endif /* !lint */
33
34 #include <sys/types.h>
35
36 #include <errno.h>
37 #include <stdint.h>
38 #include <unistd.h>
39
40 #include <rump/rumpuser.h>
41
42 #include "rumpuser_int.h"
43
44 void
rumpuser_bio(int fd,int op,void * data,size_t dlen,int64_t doff,rump_biodone_fn biodone,void * bioarg)45 rumpuser_bio(int fd, int op, void *data, size_t dlen, int64_t doff,
46 rump_biodone_fn biodone, void *bioarg)
47 {
48 ssize_t rv;
49 int error = 0;
50
51 if (op & RUMPUSER_BIO_READ) {
52 if ((rv = pread(fd, data, dlen, doff)) == -1)
53 error = rumpuser__errtrans(errno);
54 } else {
55 if ((rv = pwrite(fd, data, dlen, doff)) == -1)
56 error = rumpuser__errtrans(errno);
57 if (error == 0 && (op & RUMPUSER_BIO_SYNC)) {
58 #ifdef HAVE_FSYNC_RANGE
59 fsync_range(fd, FDATASYNC, doff, dlen);
60 #else
61 fsync(fd);
62 #endif
63 }
64 }
65 if (rv == -1)
66 rv = 0;
67 biodone(bioarg, (size_t)rv, error);
68 }
69