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