92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
|
|
/* All Rights Reserved */
|
|
|
|
/*
|
|
* University Copyright- Copyright (c) 1982, 1986, 1988
|
|
* The Regents of the University of California
|
|
* All Rights Reserved
|
|
*
|
|
* University Acknowledgment- Portions of this document are derived from
|
|
* software developed by the University of California, Berkeley, and its
|
|
* contributors.
|
|
*/
|
|
|
|
/*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/vnode.h>
|
|
|
|
/*
|
|
* same as uiomove() but doesn't modify uio structure.
|
|
* return in cbytes how many bytes were copied.
|
|
*/
|
|
int
|
|
uiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes)
|
|
{
|
|
struct iovec small_iovec[1];
|
|
struct uio small_uio_clone;
|
|
struct uio *uio_clone;
|
|
int error;
|
|
|
|
ASSERT3U(uio->uio_rw, ==, rw);
|
|
if (uio->uio_iovcnt == 1) {
|
|
small_uio_clone = *uio;
|
|
small_iovec[0] = *uio->uio_iov;
|
|
small_uio_clone.uio_iov = small_iovec;
|
|
uio_clone = &small_uio_clone;
|
|
} else {
|
|
uio_clone = cloneuio(uio);
|
|
}
|
|
|
|
error = vn_io_fault_uiomove(p, n, uio_clone);
|
|
*cbytes = uio->uio_resid - uio_clone->uio_resid;
|
|
if (uio_clone != &small_uio_clone)
|
|
free(uio_clone, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Drop the next n chars out of *uiop.
|
|
*/
|
|
void
|
|
uioskip(uio_t *uio, size_t n)
|
|
{
|
|
enum uio_seg segflg;
|
|
|
|
/* For the full compatibility with illumos. */
|
|
if (n > uio->uio_resid)
|
|
return;
|
|
|
|
segflg = uio->uio_segflg;
|
|
uio->uio_segflg = UIO_NOCOPY;
|
|
uiomove(NULL, n, uio->uio_rw, uio);
|
|
uio->uio_segflg = segflg;
|
|
}
|