| /* |
| * 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 <sys/types.h> |
| #include_next <sys/uio.h> |
| |
| #ifdef __APPLE__ |
| #include <sys/_types/_iovec_t.h> |
| #endif |
| |
| #include <stdint.h> |
| typedef struct iovec iovec_t; |
| |
| #if defined(__linux__) || defined(__APPLE__) |
| typedef enum zfs_uio_rw { |
| UIO_READ = 0, |
| UIO_WRITE = 1, |
| } zfs_uio_rw_t; |
| |
| typedef enum zfs_uio_seg { |
| UIO_USERSPACE = 0, |
| UIO_SYSSPACE = 1, |
| } zfs_uio_seg_t; |
| |
| #elif defined(__FreeBSD__) |
| typedef enum uio_seg zfs_uio_seg_t; |
| #endif |
| |
| typedef struct zfs_uio { |
| struct iovec *uio_iov; /* pointer to array of iovecs */ |
| int uio_iovcnt; /* number of iovecs */ |
| offset_t uio_loffset; /* file offset */ |
| zfs_uio_seg_t uio_segflg; /* address space (kernel or user) */ |
| uint16_t uio_fmode; /* file mode flags */ |
| uint16_t uio_extflg; /* extended flags */ |
| ssize_t uio_resid; /* residual count */ |
| } zfs_uio_t; |
| |
| #define zfs_uio_segflg(uio) (uio)->uio_segflg |
| #define zfs_uio_offset(uio) (uio)->uio_loffset |
| #define zfs_uio_resid(uio) (uio)->uio_resid |
| #define zfs_uio_iovcnt(uio) (uio)->uio_iovcnt |
| #define zfs_uio_iovlen(uio, idx) (uio)->uio_iov[(idx)].iov_len |
| #define zfs_uio_iovbase(uio, idx) (uio)->uio_iov[(idx)].iov_base |
| |
| static inline void |
| zfs_uio_iov_at_index(zfs_uio_t *uio, uint_t idx, void **base, uint64_t *len) |
| { |
| *base = zfs_uio_iovbase(uio, idx); |
| *len = zfs_uio_iovlen(uio, idx); |
| } |
| |
| static inline void |
| zfs_uio_advance(zfs_uio_t *uio, size_t size) |
| { |
| uio->uio_resid -= size; |
| uio->uio_loffset += size; |
| } |
| |
| static inline offset_t |
| zfs_uio_index_at_offset(zfs_uio_t *uio, offset_t off, uint_t *vec_idx) |
| { |
| *vec_idx = 0; |
| while (*vec_idx < (uint_t)zfs_uio_iovcnt(uio) && |
| off >= (offset_t)zfs_uio_iovlen(uio, *vec_idx)) { |
| off -= zfs_uio_iovlen(uio, *vec_idx); |
| (*vec_idx)++; |
| } |
| |
| return (off); |
| } |
| |
| #endif /* _SYS_UIO_H */ |