include/os/freebsd/spl/sys/uio.h

   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 #ifndef _STANDALONE
  33
  34 #include_next <sys/uio.h>
  35 #include <sys/_uio.h>
  36 #include <sys/debug.h>
  37
  38 typedef struct iovec    iovec_t;
  39 typedef enum uio_seg    zfs_uio_seg_t;
  40 typedef enum uio_rw     zfs_uio_rw_t;
  41
  42 typedef struct zfs_uio {
  43         struct uio      *uio;
  44 } zfs_uio_t;
  45
  46 #define GET_UIO_STRUCT(u)       (u)->uio
  47 #define zfs_uio_segflg(u)       GET_UIO_STRUCT(u)->uio_segflg
  48 #define zfs_uio_offset(u)       GET_UIO_STRUCT(u)->uio_offset
  49 #define zfs_uio_resid(u)        GET_UIO_STRUCT(u)->uio_resid
  50 #define zfs_uio_iovcnt(u)       GET_UIO_STRUCT(u)->uio_iovcnt
  51 #define zfs_uio_iovlen(u, idx)  GET_UIO_STRUCT(u)->uio_iov[(idx)].iov_len
  52 #define zfs_uio_iovbase(u, idx) GET_UIO_STRUCT(u)->uio_iov[(idx)].iov_base
  53 #define zfs_uio_td(u)           GET_UIO_STRUCT(u)->uio_td
  54 #define zfs_uio_rw(u)           GET_UIO_STRUCT(u)->uio_rw
  55 #define zfs_uio_fault_disable(u, set)
  56 #define zfs_uio_prefaultpages(size, u)  (0)
  57
  58 static inline void
  59 zfs_uio_setoffset(zfs_uio_t *uio, offset_t off)
  60 {
  61         zfs_uio_offset(uio) = off;
  62 }
  63
  64 static inline void
  65 zfs_uio_advance(zfs_uio_t *uio, size_t size)
  66 {
  67         zfs_uio_resid(uio) -= size;
  68         zfs_uio_offset(uio) += size;
  69 }
  70
  71 static __inline void
  72 zfs_uio_init(zfs_uio_t *uio, struct uio *uio_s)
  73 {
  74         GET_UIO_STRUCT(uio) = uio_s;
  75 }
  76
  77 int zfs_uio_fault_move(void *p, size_t n, zfs_uio_rw_t dir, zfs_uio_t *uio);
  78
  79 #endif /* !_STANDALONE */
  80
  81 #endif  /* !_OPENSOLARIS_SYS_UIO_H_ */