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/*
* Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _OPENSOLARIS_SYS_UIO_H_
#define _OPENSOLARIS_SYS_UIO_H_
#ifndef _STANDALONE
#include_next <sys/uio.h>
#include <sys/_uio.h>
#include <sys/debug.h>
#define uio_loffset uio_offset
typedef struct uio uio_t;
typedef struct iovec iovec_t;
typedef enum uio_seg uio_seg_t;
typedef enum xuio_type {
UIOTYPE_ASYNCIO,
UIOTYPE_ZEROCOPY
} xuio_type_t;
typedef struct xuio {
uio_t xu_uio;
/* Extended uio fields */
enum xuio_type xu_type; /* What kind of uio structure? */
union {
struct {
int xu_zc_rw;
void *xu_zc_priv;
} 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
static __inline int
zfs_uiomove(void *cp, size_t n, enum uio_rw dir, uio_t *uio)
{
ASSERT(uio->uio_rw == dir);
return (uiomove(cp, (int)n, uio));
}
#define uiomove(cp, n, dir, uio) zfs_uiomove((cp), (n), (dir), (uio))
int uiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes);
void uioskip(uio_t *uiop, size_t n);
#define uio_segflg(uio) (uio)->uio_segflg
#define uio_offset(uio) (uio)->uio_loffset
#define uio_resid(uio) (uio)->uio_resid
#define uio_iovcnt(uio) (uio)->uio_iovcnt
#define uio_iovlen(uio, idx) (uio)->uio_iov[(idx)].iov_len
#define uio_iovbase(uio, idx) (uio)->uio_iov[(idx)].iov_base
#define uio_fault_disable(uio, set)
static inline void
uio_iov_at_index(uio_t *uio, uint_t idx, void **base, uint64_t *len)
{
*base = uio_iovbase(uio, idx);
*len = uio_iovlen(uio, idx);
}
static inline void
uio_advance(uio_t *uio, size_t size)
{
uio->uio_resid -= size;
uio->uio_loffset += size;
}
static inline offset_t
uio_index_at_offset(uio_t *uio, offset_t off, uint_t *vec_idx)
{
*vec_idx = 0;
while (*vec_idx < uio_iovcnt(uio) && off >= uio_iovlen(uio, *vec_idx)) {
off -= uio_iovlen(uio, *vec_idx);
(*vec_idx)++;
}
return (off);
}
#endif /* !_STANDALONE */
#endif /* !_OPENSOLARIS_SYS_UIO_H_ */
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