1 /* 2 * Copyright (c) 1982, 1986, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)uio.h 8.5 (Berkeley) 2/22/94 34 * $FreeBSD: src/sys/sys/uio.h,v 1.11.2.1 2001/09/28 16:58:35 dillon Exp $ 35 * $DragonFly: src/sys/sys/uio.h,v 1.2 2003/06/17 04:28:59 dillon Exp $ 36 */ 37 38 #ifndef _SYS_UIO_H_ 39 #define _SYS_UIO_H_ 40 41 /* 42 * XXX 43 * iov_base should be a void *. 44 */ 45 struct iovec { 46 char *iov_base; /* Base address. */ 47 size_t iov_len; /* Length. */ 48 }; 49 50 enum uio_rw { UIO_READ, UIO_WRITE }; 51 52 /* Segment flag values. */ 53 enum uio_seg { 54 UIO_USERSPACE, /* from user data space */ 55 UIO_SYSSPACE, /* from system space */ 56 UIO_USERISPACE, /* from user I space */ 57 UIO_NOCOPY /* don't copy, already in object */ 58 }; 59 60 #ifdef _KERNEL 61 62 struct uio { 63 struct iovec *uio_iov; 64 int uio_iovcnt; 65 off_t uio_offset; 66 int uio_resid; 67 enum uio_seg uio_segflg; 68 enum uio_rw uio_rw; 69 struct proc *uio_procp; 70 }; 71 72 /* 73 * Limits 74 */ 75 #define UIO_MAXIOV 1024 /* max 1K of iov's */ 76 #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */ 77 78 struct vm_object; 79 80 void uio_yield __P((void)); 81 int uiomove __P((caddr_t, int, struct uio *)); 82 int uiomoveco __P((caddr_t, int, struct uio *, struct vm_object *)); 83 int uioread __P((int, struct uio *, struct vm_object *, int *)); 84 85 #else /* !_KERNEL */ 86 87 #include <sys/cdefs.h> 88 89 __BEGIN_DECLS 90 ssize_t readv __P((int, const struct iovec *, int)); 91 ssize_t writev __P((int, const struct iovec *, int)); 92 __END_DECLS 93 94 #endif /* _KERNEL */ 95 96 #endif /* !_SYS_UIO_H_ */ 97