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/*
* 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 https://opensource.org/licenses/CDDL-1.0.
* 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, ssize_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 */
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