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
38 struct 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
51 typedef struct uio uio_t;
52 typedef struct iovec iovec_t;
53
54 typedef enum xuio_type {
55 UIOTYPE_ASYNCIO,
56 UIOTYPE_ZEROCOPY
57 } xuio_type_t;
58
59 typedef 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
76 static __inline int
zfs_uiomove(void * cp,size_t n,enum uio_rw dir,uio_t * uio)77 zfs_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
85 int uiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes);
86 void uioskip(uio_t *uiop, size_t n);
87 #endif /* BUILDING_ZFS */
88
89 #endif /* !_OPENSOLARIS_SYS_UIO_H_ */
90