11553Srgrimes/* 21553Srgrimes * CDDL HEADER START 31553Srgrimes * 41553Srgrimes * The contents of this file are subject to the terms of the 51553Srgrimes * Common Development and Distribution License (the "License"). 61553Srgrimes * You may not use this file except in compliance with the License. 71553Srgrimes * 81553Srgrimes * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 91553Srgrimes * or http://www.opensolaris.org/os/licensing. 101553Srgrimes * See the License for the specific language governing permissions 111553Srgrimes * and limitations under the License. 121553Srgrimes * 131553Srgrimes * When distributing Covered Code, include this CDDL HEADER in each 141553Srgrimes * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 151553Srgrimes * If applicable, add the following below this CDDL HEADER, with the 161553Srgrimes * fields enclosed by brackets "[]" replaced with your own identifying 171553Srgrimes * information: Portions Copyright [yyyy] [name of copyright owner] 181553Srgrimes * 191553Srgrimes * CDDL HEADER END 201553Srgrimes */ 211553Srgrimes/* 221553Srgrimes * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 231553Srgrimes * Use is subject to license terms. 241553Srgrimes */ 251553Srgrimes 261553Srgrimes/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 271553Srgrimes/* All Rights Reserved */ 281553Srgrimes 291553Srgrimes/* 301553Srgrimes * University Copyright- Copyright (c) 1982, 1986, 1988 3130642Scharnier * The Regents of the University of California 321553Srgrimes * All Rights Reserved 331553Srgrimes * 341553Srgrimes * University Acknowledgment- Portions of this document are derived from 351553Srgrimes * software developed by the University of California, Berkeley, and its 361553Srgrimes * contributors. 3730642Scharnier */ 381553Srgrimes 3930642Scharnier/* 4030642Scharnier */ 4150479Speter 421553Srgrimes#include <sys/types.h> 431553Srgrimes#include <sys/uio.h> 441553Srgrimes#include <sys/vnode.h> 451553Srgrimes 4630642Scharnier/* 471553Srgrimes * same as uiomove() but doesn't modify uio structure. 4830642Scharnier * return in cbytes how many bytes were copied. 491553Srgrimes */ 50116078Simpint 511553Srgrimesuiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes) 5230642Scharnier{ 531553Srgrimes struct iovec small_iovec[1]; 541553Srgrimes struct uio small_uio_clone; 551553Srgrimes struct uio *uio_clone; 561553Srgrimes int error; 571553Srgrimes 58120995Stjr ASSERT3U(uio->uio_rw, ==, rw); 59120995Stjr if (uio->uio_iovcnt == 1) { 601553Srgrimes small_uio_clone = *uio; 611553Srgrimes small_iovec[0] = *uio->uio_iov; 62173412Skevlo small_uio_clone.uio_iov = small_iovec; 631553Srgrimes uio_clone = &small_uio_clone; 641553Srgrimes } else { 65246209Scharnier uio_clone = cloneuio(uio); 661553Srgrimes } 671553Srgrimes 681553Srgrimes error = vn_io_fault_uiomove(p, n, uio_clone); 691553Srgrimes *cbytes = uio->uio_resid - uio_clone->uio_resid; 701553Srgrimes if (uio_clone != &small_uio_clone) 711553Srgrimes freeuio(uio_clone); 721553Srgrimes return (error); 731553Srgrimes} 7430642Scharnier 7530642Scharnier/* 76220970Ssimon * Drop the next n chars out of *uiop. 77220970Ssimon */ 781553Srgrimesvoid 791553Srgrimesuioskip(uio_t *uio, size_t n) 801553Srgrimes{ 811553Srgrimes enum uio_seg segflg; 821553Srgrimes 831553Srgrimes /* For the full compatibility with illumos. */ 841553Srgrimes if (n > uio->uio_resid) 851553Srgrimes return; 861553Srgrimes 871553Srgrimes segflg = uio->uio_segflg; 881553Srgrimes uio->uio_segflg = UIO_NOCOPY; 891553Srgrimes uiomove(NULL, n, uio->uio_rw, uio); 901553Srgrimes uio->uio_segflg = segflg; 911553Srgrimes} 921553Srgrimes