1/*- 2 * Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29#ifndef _OPENSOLARIS_SYS_UIO_H_ 30#define _OPENSOLARIS_SYS_UIO_H_ 31 32#include_next <sys/uio.h> 33#include <sys/debug.h> 34 35#ifndef _KERNEL 36#define FOF_OFFSET 1 /* Use the offset in uio argument */ 37 38struct uio { 39 struct iovec *uio_iov; 40 int uio_iovcnt; 41 off_t uio_offset; 42 int uio_resid; 43 enum uio_seg uio_segflg; 44 enum uio_rw uio_rw; 45 void *uio_td; 46}; 47#endif 48 49#define uio_loffset uio_offset 50 51typedef struct uio uio_t; 52typedef struct iovec iovec_t; 53 54typedef enum xuio_type { 55 UIOTYPE_ASYNCIO, 56 UIOTYPE_ZEROCOPY 57} xuio_type_t; 58 59typedef struct xuio { 60 uio_t xu_uio; 61 62 /* Extended uio fields */ 63 enum xuio_type xu_type; /* What kind of uio structure? */ 64 union { 65 struct { 66 int xu_zc_rw; 67 void *xu_zc_priv; 68 } xu_zc; 69 } xu_ext; 70} xuio_t; 71 72#define XUIO_XUZC_PRIV(xuio) xuio->xu_ext.xu_zc.xu_zc_priv 73#define XUIO_XUZC_RW(xuio) xuio->xu_ext.xu_zc.xu_zc_rw 74 75#ifdef BUILDING_ZFS 76static __inline int 77zfs_uiomove(void *cp, size_t n, enum uio_rw dir, uio_t *uio) 78{ 79 80 ASSERT(uio->uio_rw == dir); 81 return (uiomove(cp, (int)n, uio)); 82} 83#define uiomove(cp, n, dir, uio) zfs_uiomove((cp), (n), (dir), (uio)) 84 85int uiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes); 86void uioskip(uio_t *uiop, size_t n); 87#endif /* BUILDING_ZFS */ 88 89#endif /* !_OPENSOLARIS_SYS_UIO_H_ */ 90