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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)uio.h 8.5 (Berkeley) 2/22/94 30 * $FreeBSD: src/sys/sys/uio.h,v 1.11.2.1 2001/09/28 16:58:35 dillon Exp $ 31 */ 32 33 #ifndef _SYS_UIO_H_ 34 #define _SYS_UIO_H_ 35 36 #include <sys/cdefs.h> 37 #include <sys/_iovec.h> 38 #include <machine/stdint.h> 39 40 #if __BSD_VISIBLE 41 #ifndef _OFF_T_DECLARED 42 typedef __off_t off_t; 43 #define _OFF_T_DECLARED 44 #endif 45 #endif 46 47 /* The size_t is expected to be provided by <sys/_iovec.h> */ 48 49 #ifndef _SSIZE_T_DECLARED 50 typedef __ssize_t ssize_t; 51 #define _SSIZE_T_DECLARED 52 #endif 53 54 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 55 #include <sys/_uio.h> /* struct uio and enums */ 56 57 /* 58 * Limits 59 */ 60 #define UIO_MAXIOV 1024 /* max 1K of iov's */ 61 #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */ 62 63 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 64 65 #if defined(_KERNEL) 66 struct buf; 67 struct vm_object; 68 struct vm_page; 69 70 int uiomove (caddr_t, size_t, struct uio *); 71 int uiomove_nofault (caddr_t, size_t, struct uio *); 72 int uiomovebp (struct buf *, caddr_t, size_t, struct uio *); 73 int uiomovez (size_t, struct uio *); 74 int uiomove_frombuf (void *buf, size_t buflen, struct uio *uio); 75 int uiomove_fromphys(struct vm_page *ma[], vm_offset_t offset, 76 size_t n, struct uio *uio); 77 int uioread (int, struct uio *, struct vm_object *, int *); 78 int iovec_copyin(const struct iovec *, struct iovec **, struct iovec *, 79 int, size_t *); 80 81 #ifdef MALLOC_DECLARE 82 MALLOC_DECLARE(M_IOV); /* only if <sys/malloc.h> included before! */ 83 #endif 84 85 #ifdef MALLOC_DEFINE 86 #include <sys/_null.h> /* XXX, visibility */ 87 /* 88 * MPSAFE 89 */ 90 static __inline void 91 iovec_free(struct iovec **kiov, struct iovec *siov) 92 { 93 if (*kiov != siov) { 94 kfree(*kiov, M_IOV); 95 *kiov = NULL; 96 } 97 } 98 #endif 99 #endif /* _KERNEL */ 100 101 #ifndef _KERNEL 102 __BEGIN_DECLS 103 ssize_t readv(int, const struct iovec *, int); 104 ssize_t writev(int, const struct iovec *, int); 105 #if __BSD_VISIBLE 106 ssize_t preadv(int, const struct iovec *, int, off_t); 107 ssize_t pwritev(int, const struct iovec *, int, off_t); 108 #endif 109 __END_DECLS 110 #endif /* !_KERNEL */ 111 112 #endif /* !_SYS_UIO_H_ */ 113