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      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
     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