include/sys/uio.h

   1 /*****************************************************************************\
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *  For details, see <http://github.com/behlendorf/spl/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23 \*****************************************************************************/
  24
  25 #ifndef _SPL_UIO_H
  26 #define _SPL_UIO_H
  27
  28 #include <linux/uio.h>
  29 #include <asm/uaccess.h>
  30 #include <sys/types.h>
  31
  32 typedef enum uio_rw {
  33         UIO_READ =      0,
  34         UIO_WRITE =     1,
  35 } uio_rw_t;
  36
  37 typedef enum uio_seg {
  38         UIO_USERSPACE = 0,
  39         UIO_SYSSPACE =  1,
  40         UIO_USERISPACE =2,
  41 } uio_seg_t;
  42
  43 typedef struct uio {
  44         struct iovec    *uio_iov;       /* pointer to array of iovecs */
  45         int             uio_iovcnt;     /* number of iovecs */
  46         offset_t        uio_loffset;    /* file offset */
  47         uio_seg_t       uio_segflg;     /* address space (kernel or user) */
  48         uint16_t        uio_fmode;      /* file mode flags */
  49         uint16_t        uio_extflg;     /* extended flags */
  50         offset_t        uio_limit;      /* u-limit (maximum byte offset) */
  51         ssize_t         uio_resid;      /* residual count */
  52 } uio_t;
  53
  54 typedef struct aio_req {
  55         uio_t           *aio_uio;       /* UIO for this request */
  56         void            *aio_private;
  57 } aio_req_t;
  58
  59 #endif /* SPL_UIO_H */