| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License, Version 1.0 only |
| * (the "License"). You may not use this file except in compliance |
| * with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright 2005 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| |
| /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ |
| /* All Rights Reserved */ |
| |
| /* |
| * University Copyright- Copyright (c) 1982, 1986, 1988 |
| * The Regents of the University of California |
| * All Rights Reserved |
| * |
| * University Acknowledgment- Portions of this document are derived from |
| * software developed by the University of California, Berkeley, and its |
| * contributors. |
| */ |
| |
| #ifndef _LIBSPL_SYS_UIO_H |
| #define _LIBSPL_SYS_UIO_H |
| |
| #include_next <sys/uio.h> |
| |
| typedef struct iovec iovec_t; |
| |
| typedef enum uio_rw { |
| UIO_READ = 0, |
| UIO_WRITE = 1, |
| } uio_rw_t; |
| |
| typedef enum uio_seg { |
| UIO_USERSPACE = 0, |
| UIO_SYSSPACE = 1, |
| UIO_USERISPACE = 2, |
| } uio_seg_t; |
| |
| typedef struct uio { |
| struct iovec *uio_iov; /* pointer to array of iovecs */ |
| int uio_iovcnt; /* number of iovecs */ |
| offset_t uio_loffset; /* file offset */ |
| uio_seg_t uio_segflg; /* address space (kernel or user) */ |
| uint16_t uio_fmode; /* file mode flags */ |
| uint16_t uio_extflg; /* extended flags */ |
| offset_t uio_limit; /* u-limit (maximum byte offset) */ |
| ssize_t uio_resid; /* residual count */ |
| } uio_t; |
| |
| typedef enum xuio_type { |
| UIOTYPE_ASYNCIO, |
| UIOTYPE_ZEROCOPY, |
| } xuio_type_t; |
| |
| #define UIOA_IOV_MAX 16 |
| |
| typedef struct uioa_page_s { /* locked uio_iov state */ |
| int uioa_pfncnt; /* count of pfn_t(s) in *uioa_ppp */ |
| void **uioa_ppp; /* page_t or pfn_t array */ |
| caddr_t uioa_base; /* address base */ |
| size_t uioa_len; /* span length */ |
| } uioa_page_t; |
| |
| typedef struct xuio { |
| uio_t xu_uio; /* embedded UIO structure */ |
| |
| /* Extended uio fields */ |
| enum xuio_type xu_type; /* uio type */ |
| union { |
| struct { |
| uint32_t xu_a_state; /* state of async i/o */ |
| ssize_t xu_a_mbytes; /* bytes moved */ |
| uioa_page_t *xu_a_lcur; /* uioa_locked[] pointer */ |
| void **xu_a_lppp; /* lcur->uioa_pppp[] pointer */ |
| void *xu_a_hwst[4]; /* opaque hardware state */ |
| uioa_page_t xu_a_locked[UIOA_IOV_MAX]; |
| } xu_aio; |
| |
| struct { |
| int xu_zc_rw; /* read or write buffer */ |
| void *xu_zc_priv; /* fs specific */ |
| } xu_zc; |
| } xu_ext; |
| } xuio_t; |
| |
| #define XUIO_XUZC_PRIV(xuio) xuio->xu_ext.xu_zc.xu_zc_priv |
| #define XUIO_XUZC_RW(xuio) xuio->xu_ext.xu_zc.xu_zc_rw |
| |
| #endif /* _SYS_UIO_H */ |