1*c5803757Szrj /* 2*c5803757Szrj * Copyright (c) 1982, 1986, 1993, 1994 3*c5803757Szrj * The Regents of the University of California. All rights reserved. 4*c5803757Szrj * 5*c5803757Szrj * Redistribution and use in source and binary forms, with or without 6*c5803757Szrj * modification, are permitted provided that the following conditions 7*c5803757Szrj * are met: 8*c5803757Szrj * 1. Redistributions of source code must retain the above copyright 9*c5803757Szrj * notice, this list of conditions and the following disclaimer. 10*c5803757Szrj * 2. Redistributions in binary form must reproduce the above copyright 11*c5803757Szrj * notice, this list of conditions and the following disclaimer in the 12*c5803757Szrj * documentation and/or other materials provided with the distribution. 13*c5803757Szrj * 3. Neither the name of the University nor the names of its contributors 14*c5803757Szrj * may be used to endorse or promote products derived from this software 15*c5803757Szrj * without specific prior written permission. 16*c5803757Szrj * 17*c5803757Szrj * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18*c5803757Szrj * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*c5803757Szrj * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*c5803757Szrj * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21*c5803757Szrj * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*c5803757Szrj * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*c5803757Szrj * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*c5803757Szrj * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*c5803757Szrj * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*c5803757Szrj * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*c5803757Szrj * SUCH DAMAGE. 28*c5803757Szrj * 29*c5803757Szrj * @(#)uio.h 8.5 (Berkeley) 2/22/94 30*c5803757Szrj */ 31*c5803757Szrj 32*c5803757Szrj #ifndef _SYS__UIO_H_ 33*c5803757Szrj #define _SYS__UIO_H_ 34*c5803757Szrj 35*c5803757Szrj /* 36*c5803757Szrj * Do not include this header outside _KERNEL or _KERNEL_STRUCTURES scopes. 37*c5803757Szrj * Used in <sys/user.h>. 38*c5803757Szrj */ 39*c5803757Szrj 40*c5803757Szrj #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 41*c5803757Szrj enum uio_rw { 42*c5803757Szrj UIO_READ, 43*c5803757Szrj UIO_WRITE 44*c5803757Szrj }; 45*c5803757Szrj 46*c5803757Szrj /* Segment flag values. */ 47*c5803757Szrj enum uio_seg { 48*c5803757Szrj UIO_USERSPACE, /* from user data space */ 49*c5803757Szrj UIO_SYSSPACE, /* from system space */ 50*c5803757Szrj UIO_NOCOPY /* don't copy, already in object */ 51*c5803757Szrj }; 52*c5803757Szrj 53*c5803757Szrj struct iovec; 54*c5803757Szrj struct thread; 55*c5803757Szrj 56*c5803757Szrj /* 57*c5803757Szrj * uio_td is primarily used for USERSPACE transfers, but some devices 58*c5803757Szrj * like ttys may also use it to get at the process. 59*c5803757Szrj * 60*c5803757Szrj * NOTE: uio_resid: Previously used int and FreeBSD decided to use ssize_t, 61*c5803757Szrj * but after reviewing use cases and in particular the fact that the 62*c5803757Szrj * iov uses an unsigned quantity, DragonFly will use the (unsigned) 63*c5803757Szrj * size_t. 64*c5803757Szrj */ 65*c5803757Szrj struct uio { 66*c5803757Szrj struct iovec *uio_iov; 67*c5803757Szrj int uio_iovcnt; 68*c5803757Szrj off_t uio_offset; 69*c5803757Szrj size_t uio_resid; 70*c5803757Szrj enum uio_seg uio_segflg; 71*c5803757Szrj enum uio_rw uio_rw; 72*c5803757Szrj struct thread *uio_td; 73*c5803757Szrj }; 74*c5803757Szrj #endif /* _KERNEL || _KERNEL_STRUCTURES */ 75*c5803757Szrj 76*c5803757Szrj #endif /* !_SYS__UIO_H_ */ 77